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Comparing libev/ev.c (file contents):
Revision 1.242 by root, Fri May 9 14:07:19 2008 UTC vs.
Revision 1.378 by root, Mon Jun 13 09:52:36 2011 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008 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 modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
35 * and other provisions required by the GPL. If you do not delete the 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 36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL. 37 * either the BSD or the GPL.
38 */ 38 */
39 39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */ 40/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
47# include EV_CONFIG_H 43# include EV_CONFIG_H
48# else 44# else
49# include "config.h" 45# include "config.h"
50# endif 46# endif
51 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
52# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
54# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
55# endif 71# endif
56# ifndef EV_USE_REALTIME 72# ifndef EV_USE_REALTIME
57# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
58# endif 74# endif
59# else 75# else
60# ifndef EV_USE_MONOTONIC 76# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0 77# define EV_USE_MONOTONIC 0
62# endif 78# endif
63# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
65# endif 81# endif
66# endif 82# endif
67 83
84# if HAVE_NANOSLEEP
68# ifndef EV_USE_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
70# define EV_USE_NANOSLEEP 1 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
71# else 88# else
89# undef EV_USE_NANOSLEEP
72# 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
73# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
74# endif 100# endif
75 101
102# if HAVE_POLL && HAVE_POLL_H
76# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
77# if HAVE_SELECT && HAVE_SYS_SELECT_H 104# define EV_USE_POLL EV_FEATURE_BACKENDS
78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif 105# endif
82# endif
83
84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
86# define EV_USE_POLL 1
87# else 106# else
107# undef EV_USE_POLL
88# define EV_USE_POLL 0 108# define EV_USE_POLL 0
89# endif
90# endif 109# endif
91 110
92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
95# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
96# define EV_USE_EPOLL 0
97# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
98# endif 118# endif
99 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
100# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
106# endif 127# endif
107 128
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
111# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
112# define EV_USE_PORT 0
113# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
114# endif 136# endif
115 137
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1 139# ifndef EV_USE_INOTIFY
119# else
120# define EV_USE_INOTIFY 0 140# define EV_USE_INOTIFY EV_FEATURE_OS
121# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
122# endif 145# endif
123 146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
124# ifndef EV_USE_EVENTFD 148# ifndef EV_USE_SIGNALFD
125# if HAVE_EVENTFD 149# define EV_USE_SIGNALFD EV_FEATURE_OS
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif 150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
130# endif 154# endif
131 155
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
132#endif 163# endif
164
165#endif
133 166
134#include <math.h>
135#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
136#include <fcntl.h> 169#include <fcntl.h>
137#include <stddef.h> 170#include <stddef.h>
138 171
139#include <stdio.h> 172#include <stdio.h>
140 173
141#include <assert.h> 174#include <assert.h>
142#include <errno.h> 175#include <errno.h>
143#include <sys/types.h> 176#include <sys/types.h>
144#include <time.h> 177#include <time.h>
178#include <limits.h>
145 179
146#include <signal.h> 180#include <signal.h>
147 181
148#ifdef EV_H 182#ifdef EV_H
149# include EV_H 183# include EV_H
150#else 184#else
151# include "ev.h" 185# include "ev.h"
152#endif 186#endif
187
188EV_CPP(extern "C" {)
153 189
154#ifndef _WIN32 190#ifndef _WIN32
155# include <sys/time.h> 191# include <sys/time.h>
156# include <sys/wait.h> 192# include <sys/wait.h>
157# include <unistd.h> 193# include <unistd.h>
158#else 194#else
195# include <io.h>
159# define WIN32_LEAN_AND_MEAN 196# define WIN32_LEAN_AND_MEAN
160# include <windows.h> 197# include <windows.h>
161# ifndef EV_SELECT_IS_WINSOCKET 198# ifndef EV_SELECT_IS_WINSOCKET
162# define EV_SELECT_IS_WINSOCKET 1 199# define EV_SELECT_IS_WINSOCKET 1
163# endif 200# endif
201# undef EV_AVOID_STDIO
164#endif 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
165 211
166/* this block tries to deduce configuration from header-defined symbols and defaults */ 212/* this block tries to deduce configuration from header-defined symbols and defaults */
167 213
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
251# endif
252#endif
253
168#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
169# define EV_USE_MONOTONIC 0 258# define EV_USE_MONOTONIC 0
259# endif
170#endif 260#endif
171 261
172#ifndef EV_USE_REALTIME 262#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0 263# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
174#endif 264#endif
175 265
176#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
177# define EV_USE_NANOSLEEP 0 270# define EV_USE_NANOSLEEP 0
271# endif
178#endif 272#endif
179 273
180#ifndef EV_USE_SELECT 274#ifndef EV_USE_SELECT
181# define EV_USE_SELECT 1 275# define EV_USE_SELECT EV_FEATURE_BACKENDS
182#endif 276#endif
183 277
184#ifndef EV_USE_POLL 278#ifndef EV_USE_POLL
185# ifdef _WIN32 279# ifdef _WIN32
186# define EV_USE_POLL 0 280# define EV_USE_POLL 0
187# else 281# else
188# define EV_USE_POLL 1 282# define EV_USE_POLL EV_FEATURE_BACKENDS
189# endif 283# endif
190#endif 284#endif
191 285
192#ifndef EV_USE_EPOLL 286#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 287# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1 288# define EV_USE_EPOLL EV_FEATURE_BACKENDS
195# else 289# else
196# define EV_USE_EPOLL 0 290# define EV_USE_EPOLL 0
197# endif 291# endif
198#endif 292#endif
199 293
… …
205# define EV_USE_PORT 0 299# define EV_USE_PORT 0
206#endif 300#endif
207 301
208#ifndef EV_USE_INOTIFY 302#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1 304# define EV_USE_INOTIFY EV_FEATURE_OS
211# else 305# else
212# define EV_USE_INOTIFY 0 306# define EV_USE_INOTIFY 0
213# endif 307# endif
214#endif 308#endif
215 309
216#ifndef EV_PID_HASHSIZE 310#ifndef EV_PID_HASHSIZE
217# if EV_MINIMAL 311# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
218# define EV_PID_HASHSIZE 1
219# else
220# define EV_PID_HASHSIZE 16
221# endif
222#endif 312#endif
223 313
224#ifndef EV_INOTIFY_HASHSIZE 314#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL 315# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
226# define EV_INOTIFY_HASHSIZE 1
227# else
228# define EV_INOTIFY_HASHSIZE 16
229# endif
230#endif 316#endif
231 317
232#ifndef EV_USE_EVENTFD 318#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 319# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1 320# define EV_USE_EVENTFD EV_FEATURE_OS
235# else 321# else
236# define EV_USE_EVENTFD 0 322# define EV_USE_EVENTFD 0
237# endif 323# endif
238#endif 324#endif
239 325
326#ifndef EV_USE_SIGNALFD
327# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
328# define EV_USE_SIGNALFD EV_FEATURE_OS
329# else
330# define EV_USE_SIGNALFD 0
331# endif
332#endif
333
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
240/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 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
241 373
242#ifndef CLOCK_MONOTONIC 374#ifndef CLOCK_MONOTONIC
243# undef EV_USE_MONOTONIC 375# undef EV_USE_MONOTONIC
244# define EV_USE_MONOTONIC 0 376# define EV_USE_MONOTONIC 0
245#endif 377#endif
… …
253# undef EV_USE_INOTIFY 385# undef EV_USE_INOTIFY
254# define EV_USE_INOTIFY 0 386# define EV_USE_INOTIFY 0
255#endif 387#endif
256 388
257#if !EV_USE_NANOSLEEP 389#if !EV_USE_NANOSLEEP
258# ifndef _WIN32 390/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux)
259# include <sys/select.h> 392# include <sys/select.h>
260# endif 393# endif
261#endif 394#endif
262 395
263#if EV_USE_INOTIFY 396#if EV_USE_INOTIFY
397# include <sys/statfs.h>
264# 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
265#endif 404#endif
266 405
267#if EV_SELECT_IS_WINSOCKET 406#if EV_SELECT_IS_WINSOCKET
268# include <winsock.h> 407# include <winsock.h>
269#endif 408#endif
270 409
271#if EV_USE_EVENTFD 410#if EV_USE_EVENTFD
272/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 411/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
273# include <stdint.h> 412# include <stdint.h>
274# ifdef __cplusplus 413# ifndef EFD_NONBLOCK
275extern "C" { 414# define EFD_NONBLOCK O_NONBLOCK
276# endif 415# endif
277int eventfd (unsigned int initval, int flags); 416# ifndef EFD_CLOEXEC
278# ifdef __cplusplus 417# ifdef O_CLOEXEC
279} 418# define EFD_CLOEXEC O_CLOEXEC
419# else
420# define EFD_CLOEXEC 02000000
421# endif
280# 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};
281#endif 446#endif
282 447
283/**/ 448/**/
284 449
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
285/* 456/*
286 * This is used to avoid floating point rounding problems. 457 * This is used to work around floating point rounding problems.
287 * It is added to ev_rt_now when scheduling periodics
288 * to ensure progress, time-wise, even when rounding
289 * errors are against us.
290 * This value is good at least till the year 4000. 458 * This value is good at least till the year 4000.
291 * Better solutions welcome.
292 */ 459 */
293#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 */
294 462
295#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) */
296#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) */
297/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */ 465
466#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
467#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
298 468
299#if __GNUC__ >= 4 469#if __GNUC__ >= 4
300# define expect(expr,value) __builtin_expect ((expr),(value)) 470# define expect(expr,value) __builtin_expect ((expr),(value))
301# define noinline __attribute__ ((noinline)) 471# define noinline __attribute__ ((noinline))
302#else 472#else
… …
309 479
310#define expect_false(expr) expect ((expr) != 0, 0) 480#define expect_false(expr) expect ((expr) != 0, 0)
311#define expect_true(expr) expect ((expr) != 0, 1) 481#define expect_true(expr) expect ((expr) != 0, 1)
312#define inline_size static inline 482#define inline_size static inline
313 483
314#if EV_MINIMAL 484#if EV_FEATURE_CODE
485# define inline_speed static inline
486#else
315# define inline_speed static noinline 487# define inline_speed static noinline
488#endif
489
490#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
491
492#if EV_MINPRI == EV_MAXPRI
493# define ABSPRI(w) (((W)w), 0)
316#else 494#else
317# define inline_speed static inline
318#endif
319
320#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
321#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 495# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
496#endif
322 497
323#define EMPTY /* required for microsofts broken pseudo-c compiler */ 498#define EMPTY /* required for microsofts broken pseudo-c compiler */
324#define EMPTY2(a,b) /* used to suppress some warnings */ 499#define EMPTY2(a,b) /* used to suppress some warnings */
325 500
326typedef ev_watcher *W; 501typedef ev_watcher *W;
… …
328typedef ev_watcher_time *WT; 503typedef ev_watcher_time *WT;
329 504
330#define ev_active(w) ((W)(w))->active 505#define ev_active(w) ((W)(w))->active
331#define ev_at(w) ((WT)(w))->at 506#define ev_at(w) ((WT)(w))->at
332 507
508#if EV_USE_REALTIME
509/* sig_atomic_t is used to avoid per-thread variables or locking but still */
510/* giving it a reasonably high chance of working on typical architectures */
511static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
512#endif
513
333#if EV_USE_MONOTONIC 514#if EV_USE_MONOTONIC
334/* sig_atomic_t is used to avoid per-thread variables or locking but still */
335/* giving it a reasonably high chance of working on typical architetcures */
336static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 515static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
516#endif
517
518#ifndef EV_FD_TO_WIN32_HANDLE
519# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
520#endif
521#ifndef EV_WIN32_HANDLE_TO_FD
522# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
523#endif
524#ifndef EV_WIN32_CLOSE_FD
525# define EV_WIN32_CLOSE_FD(fd) close (fd)
337#endif 526#endif
338 527
339#ifdef _WIN32 528#ifdef _WIN32
340# include "ev_win32.c" 529# include "ev_win32.c"
341#endif 530#endif
342 531
343/*****************************************************************************/ 532/*****************************************************************************/
344 533
534/* define a suitable floor function (only used by periodics atm) */
535
536#if EV_USE_FLOOR
537# include <math.h>
538# define ev_floor(v) floor (v)
539#else
540
541#include <float.h>
542
543/* a floor() replacement function, should be independent of ev_tstamp type */
544static ev_tstamp noinline
545ev_floor (ev_tstamp v)
546{
547 /* the choice of shift factor is not terribly important */
548#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
549 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
550#else
551 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
552#endif
553
554 /* argument too large for an unsigned long? */
555 if (expect_false (v >= shift))
556 {
557 ev_tstamp f;
558
559 if (v == v - 1.)
560 return v; /* very large number */
561
562 f = shift * ev_floor (v * (1. / shift));
563 return f + ev_floor (v - f);
564 }
565
566 /* special treatment for negative args? */
567 if (expect_false (v < 0.))
568 {
569 ev_tstamp f = -ev_floor (-v);
570
571 return f - (f == v ? 0 : 1);
572 }
573
574 /* fits into an unsigned long */
575 return (unsigned long)v;
576}
577
578#endif
579
580/*****************************************************************************/
581
582#ifdef __linux
583# include <sys/utsname.h>
584#endif
585
586static unsigned int noinline
587ev_linux_version (void)
588{
589#ifdef __linux
590 unsigned int v = 0;
591 struct utsname buf;
592 int i;
593 char *p = buf.release;
594
595 if (uname (&buf))
596 return 0;
597
598 for (i = 3+1; --i; )
599 {
600 unsigned int c = 0;
601
602 for (;;)
603 {
604 if (*p >= '0' && *p <= '9')
605 c = c * 10 + *p++ - '0';
606 else
607 {
608 p += *p == '.';
609 break;
610 }
611 }
612
613 v = (v << 8) | c;
614 }
615
616 return v;
617#else
618 return 0;
619#endif
620}
621
622/*****************************************************************************/
623
624#if EV_AVOID_STDIO
625static void noinline
626ev_printerr (const char *msg)
627{
628 write (STDERR_FILENO, msg, strlen (msg));
629}
630#endif
631
345static void (*syserr_cb)(const char *msg); 632static void (*syserr_cb)(const char *msg);
346 633
347void 634void
348ev_set_syserr_cb (void (*cb)(const char *msg)) 635ev_set_syserr_cb (void (*cb)(const char *msg))
349{ 636{
350 syserr_cb = cb; 637 syserr_cb = cb;
351} 638}
352 639
353static void noinline 640static void noinline
354syserr (const char *msg) 641ev_syserr (const char *msg)
355{ 642{
356 if (!msg) 643 if (!msg)
357 msg = "(libev) system error"; 644 msg = "(libev) system error";
358 645
359 if (syserr_cb) 646 if (syserr_cb)
360 syserr_cb (msg); 647 syserr_cb (msg);
361 else 648 else
362 { 649 {
650#if EV_AVOID_STDIO
651 ev_printerr (msg);
652 ev_printerr (": ");
653 ev_printerr (strerror (errno));
654 ev_printerr ("\n");
655#else
363 perror (msg); 656 perror (msg);
657#endif
364 abort (); 658 abort ();
365 } 659 }
366} 660}
367 661
368static void * 662static void *
369ev_realloc_emul (void *ptr, long size) 663ev_realloc_emul (void *ptr, long size)
370{ 664{
665#if __GLIBC__
666 return realloc (ptr, size);
667#else
371 /* some systems, notably openbsd and darwin, fail to properly 668 /* some systems, notably openbsd and darwin, fail to properly
372 * implement realloc (x, 0) (as required by both ansi c-98 and 669 * implement realloc (x, 0) (as required by both ansi c-89 and
373 * the single unix specification, so work around them here. 670 * the single unix specification, so work around them here.
374 */ 671 */
375 672
376 if (size) 673 if (size)
377 return realloc (ptr, size); 674 return realloc (ptr, size);
378 675
379 free (ptr); 676 free (ptr);
380 return 0; 677 return 0;
678#endif
381} 679}
382 680
383static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 681static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
384 682
385void 683void
… …
393{ 691{
394 ptr = alloc (ptr, size); 692 ptr = alloc (ptr, size);
395 693
396 if (!ptr && size) 694 if (!ptr && size)
397 { 695 {
696#if EV_AVOID_STDIO
697 ev_printerr ("(libev) memory allocation failed, aborting.\n");
698#else
398 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 699 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
700#endif
399 abort (); 701 abort ();
400 } 702 }
401 703
402 return ptr; 704 return ptr;
403} 705}
… …
405#define ev_malloc(size) ev_realloc (0, (size)) 707#define ev_malloc(size) ev_realloc (0, (size))
406#define ev_free(ptr) ev_realloc ((ptr), 0) 708#define ev_free(ptr) ev_realloc ((ptr), 0)
407 709
408/*****************************************************************************/ 710/*****************************************************************************/
409 711
712/* set in reify when reification needed */
713#define EV_ANFD_REIFY 1
714
715/* file descriptor info structure */
410typedef struct 716typedef struct
411{ 717{
412 WL head; 718 WL head;
413 unsigned char events; 719 unsigned char events; /* the events watched for */
720 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
721 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
414 unsigned char reify; 722 unsigned char unused;
723#if EV_USE_EPOLL
724 unsigned int egen; /* generation counter to counter epoll bugs */
725#endif
415#if EV_SELECT_IS_WINSOCKET 726#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
416 SOCKET handle; 727 SOCKET handle;
417#endif 728#endif
729#if EV_USE_IOCP
730 OVERLAPPED or, ow;
731#endif
418} ANFD; 732} ANFD;
419 733
734/* stores the pending event set for a given watcher */
420typedef struct 735typedef struct
421{ 736{
422 W w; 737 W w;
423 int events; 738 int events; /* the pending event set for the given watcher */
424} ANPENDING; 739} ANPENDING;
425 740
426#if EV_USE_INOTIFY 741#if EV_USE_INOTIFY
427/* hash table entry per inotify-id */ 742/* hash table entry per inotify-id */
428typedef struct 743typedef struct
… …
430 WL head; 745 WL head;
431} ANFS; 746} ANFS;
432#endif 747#endif
433 748
434/* Heap Entry */ 749/* Heap Entry */
435#define EV_HEAP_CACHE_AT 0
436#if EV_HEAP_CACHE_AT 750#if EV_HEAP_CACHE_AT
751 /* a heap element */
437 typedef struct { 752 typedef struct {
753 ev_tstamp at;
438 WT w; 754 WT w;
439 ev_tstamp at;
440 } ANHE; 755 } ANHE;
441 756
442 #define ANHE_w(he) (he).w /* access watcher, read-write */ 757 #define ANHE_w(he) (he).w /* access watcher, read-write */
443 #define ANHE_at(he) (he).at /* access cached at, read-only */ 758 #define ANHE_at(he) (he).at /* access cached at, read-only */
444 #define ANHE_at_set(he) (he).at = (he).w->at /* update at from watcher */ 759 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
445#else 760#else
761 /* a heap element */
446 typedef WT ANHE; 762 typedef WT ANHE;
447 763
448 #define ANHE_w(he) (he) 764 #define ANHE_w(he) (he)
449 #define ANHE_at(he) (he)->at 765 #define ANHE_at(he) (he)->at
450 #define ANHE_at_set(he) 766 #define ANHE_at_cache(he)
451#endif 767#endif
452 768
453#if EV_MULTIPLICITY 769#if EV_MULTIPLICITY
454 770
455 struct ev_loop 771 struct ev_loop
… …
474 790
475 static int ev_default_loop_ptr; 791 static int ev_default_loop_ptr;
476 792
477#endif 793#endif
478 794
795#if EV_FEATURE_API
796# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
797# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
798# define EV_INVOKE_PENDING invoke_cb (EV_A)
799#else
800# define EV_RELEASE_CB (void)0
801# define EV_ACQUIRE_CB (void)0
802# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
803#endif
804
805#define EVBREAK_RECURSE 0x80
806
479/*****************************************************************************/ 807/*****************************************************************************/
480 808
809#ifndef EV_HAVE_EV_TIME
481ev_tstamp 810ev_tstamp
482ev_time (void) 811ev_time (void)
483{ 812{
484#if EV_USE_REALTIME 813#if EV_USE_REALTIME
814 if (expect_true (have_realtime))
815 {
485 struct timespec ts; 816 struct timespec ts;
486 clock_gettime (CLOCK_REALTIME, &ts); 817 clock_gettime (CLOCK_REALTIME, &ts);
487 return ts.tv_sec + ts.tv_nsec * 1e-9; 818 return ts.tv_sec + ts.tv_nsec * 1e-9;
488#else 819 }
820#endif
821
489 struct timeval tv; 822 struct timeval tv;
490 gettimeofday (&tv, 0); 823 gettimeofday (&tv, 0);
491 return tv.tv_sec + tv.tv_usec * 1e-6; 824 return tv.tv_sec + tv.tv_usec * 1e-6;
492#endif
493} 825}
826#endif
494 827
495ev_tstamp inline_size 828inline_size ev_tstamp
496get_clock (void) 829get_clock (void)
497{ 830{
498#if EV_USE_MONOTONIC 831#if EV_USE_MONOTONIC
499 if (expect_true (have_monotonic)) 832 if (expect_true (have_monotonic))
500 { 833 {
… …
521 if (delay > 0.) 854 if (delay > 0.)
522 { 855 {
523#if EV_USE_NANOSLEEP 856#if EV_USE_NANOSLEEP
524 struct timespec ts; 857 struct timespec ts;
525 858
526 ts.tv_sec = (time_t)delay; 859 EV_TS_SET (ts, delay);
527 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
528
529 nanosleep (&ts, 0); 860 nanosleep (&ts, 0);
530#elif defined(_WIN32) 861#elif defined(_WIN32)
531 Sleep ((unsigned long)(delay * 1e3)); 862 Sleep ((unsigned long)(delay * 1e3));
532#else 863#else
533 struct timeval tv; 864 struct timeval tv;
534 865
535 tv.tv_sec = (time_t)delay; 866 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
536 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 867 /* something not guaranteed by newer posix versions, but guaranteed */
537 868 /* by older ones */
869 EV_TV_SET (tv, delay);
538 select (0, 0, 0, 0, &tv); 870 select (0, 0, 0, 0, &tv);
539#endif 871#endif
540 } 872 }
541} 873}
542 874
543/*****************************************************************************/ 875/*****************************************************************************/
544 876
545#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 877#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
546 878
547int inline_size 879/* find a suitable new size for the given array, */
880/* hopefully by rounding to a nice-to-malloc size */
881inline_size int
548array_nextsize (int elem, int cur, int cnt) 882array_nextsize (int elem, int cur, int cnt)
549{ 883{
550 int ncur = cur + 1; 884 int ncur = cur + 1;
551 885
552 do 886 do
… …
569array_realloc (int elem, void *base, int *cur, int cnt) 903array_realloc (int elem, void *base, int *cur, int cnt)
570{ 904{
571 *cur = array_nextsize (elem, *cur, cnt); 905 *cur = array_nextsize (elem, *cur, cnt);
572 return ev_realloc (base, elem * *cur); 906 return ev_realloc (base, elem * *cur);
573} 907}
908
909#define array_init_zero(base,count) \
910 memset ((void *)(base), 0, sizeof (*(base)) * (count))
574 911
575#define array_needsize(type,base,cur,cnt,init) \ 912#define array_needsize(type,base,cur,cnt,init) \
576 if (expect_false ((cnt) > (cur))) \ 913 if (expect_false ((cnt) > (cur))) \
577 { \ 914 { \
578 int ocur_ = (cur); \ 915 int ocur_ = (cur); \
… …
590 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 927 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
591 } 928 }
592#endif 929#endif
593 930
594#define array_free(stem, idx) \ 931#define array_free(stem, idx) \
595 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 932 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
596 933
597/*****************************************************************************/ 934/*****************************************************************************/
935
936/* dummy callback for pending events */
937static void noinline
938pendingcb (EV_P_ ev_prepare *w, int revents)
939{
940}
598 941
599void noinline 942void noinline
600ev_feed_event (EV_P_ void *w, int revents) 943ev_feed_event (EV_P_ void *w, int revents)
601{ 944{
602 W w_ = (W)w; 945 W w_ = (W)w;
… …
611 pendings [pri][w_->pending - 1].w = w_; 954 pendings [pri][w_->pending - 1].w = w_;
612 pendings [pri][w_->pending - 1].events = revents; 955 pendings [pri][w_->pending - 1].events = revents;
613 } 956 }
614} 957}
615 958
616void inline_speed 959inline_speed void
960feed_reverse (EV_P_ W w)
961{
962 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
963 rfeeds [rfeedcnt++] = w;
964}
965
966inline_size void
967feed_reverse_done (EV_P_ int revents)
968{
969 do
970 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
971 while (rfeedcnt);
972}
973
974inline_speed void
617queue_events (EV_P_ W *events, int eventcnt, int type) 975queue_events (EV_P_ W *events, int eventcnt, int type)
618{ 976{
619 int i; 977 int i;
620 978
621 for (i = 0; i < eventcnt; ++i) 979 for (i = 0; i < eventcnt; ++i)
622 ev_feed_event (EV_A_ events [i], type); 980 ev_feed_event (EV_A_ events [i], type);
623} 981}
624 982
625/*****************************************************************************/ 983/*****************************************************************************/
626 984
627void inline_size 985inline_speed void
628anfds_init (ANFD *base, int count)
629{
630 while (count--)
631 {
632 base->head = 0;
633 base->events = EV_NONE;
634 base->reify = 0;
635
636 ++base;
637 }
638}
639
640void inline_speed
641fd_event (EV_P_ int fd, int revents) 986fd_event_nocheck (EV_P_ int fd, int revents)
642{ 987{
643 ANFD *anfd = anfds + fd; 988 ANFD *anfd = anfds + fd;
644 ev_io *w; 989 ev_io *w;
645 990
646 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 991 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
650 if (ev) 995 if (ev)
651 ev_feed_event (EV_A_ (W)w, ev); 996 ev_feed_event (EV_A_ (W)w, ev);
652 } 997 }
653} 998}
654 999
1000/* do not submit kernel events for fds that have reify set */
1001/* because that means they changed while we were polling for new events */
1002inline_speed void
1003fd_event (EV_P_ int fd, int revents)
1004{
1005 ANFD *anfd = anfds + fd;
1006
1007 if (expect_true (!anfd->reify))
1008 fd_event_nocheck (EV_A_ fd, revents);
1009}
1010
655void 1011void
656ev_feed_fd_event (EV_P_ int fd, int revents) 1012ev_feed_fd_event (EV_P_ int fd, int revents)
657{ 1013{
658 if (fd >= 0 && fd < anfdmax) 1014 if (fd >= 0 && fd < anfdmax)
659 fd_event (EV_A_ fd, revents); 1015 fd_event_nocheck (EV_A_ fd, revents);
660} 1016}
661 1017
662void inline_size 1018/* make sure the external fd watch events are in-sync */
1019/* with the kernel/libev internal state */
1020inline_size void
663fd_reify (EV_P) 1021fd_reify (EV_P)
664{ 1022{
665 int i; 1023 int i;
1024
1025#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1026 for (i = 0; i < fdchangecnt; ++i)
1027 {
1028 int fd = fdchanges [i];
1029 ANFD *anfd = anfds + fd;
1030
1031 if (anfd->reify & EV__IOFDSET && anfd->head)
1032 {
1033 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1034
1035 if (handle != anfd->handle)
1036 {
1037 unsigned long arg;
1038
1039 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1040
1041 /* handle changed, but fd didn't - we need to do it in two steps */
1042 backend_modify (EV_A_ fd, anfd->events, 0);
1043 anfd->events = 0;
1044 anfd->handle = handle;
1045 }
1046 }
1047 }
1048#endif
666 1049
667 for (i = 0; i < fdchangecnt; ++i) 1050 for (i = 0; i < fdchangecnt; ++i)
668 { 1051 {
669 int fd = fdchanges [i]; 1052 int fd = fdchanges [i];
670 ANFD *anfd = anfds + fd; 1053 ANFD *anfd = anfds + fd;
671 ev_io *w; 1054 ev_io *w;
672 1055
673 unsigned char events = 0; 1056 unsigned char o_events = anfd->events;
1057 unsigned char o_reify = anfd->reify;
674 1058
675 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1059 anfd->reify = 0;
676 events |= (unsigned char)w->events;
677 1060
678#if EV_SELECT_IS_WINSOCKET 1061 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
679 if (events)
680 { 1062 {
681 unsigned long argp; 1063 anfd->events = 0;
682 #ifdef EV_FD_TO_WIN32_HANDLE 1064
683 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1065 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
684 #else 1066 anfd->events |= (unsigned char)w->events;
685 anfd->handle = _get_osfhandle (fd); 1067
686 #endif 1068 if (o_events != anfd->events)
687 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1069 o_reify = EV__IOFDSET; /* actually |= */
688 } 1070 }
689#endif
690 1071
691 { 1072 if (o_reify & EV__IOFDSET)
692 unsigned char o_events = anfd->events;
693 unsigned char o_reify = anfd->reify;
694
695 anfd->reify = 0;
696 anfd->events = events;
697
698 if (o_events != events || o_reify & EV_IOFDSET)
699 backend_modify (EV_A_ fd, o_events, events); 1073 backend_modify (EV_A_ fd, o_events, anfd->events);
700 }
701 } 1074 }
702 1075
703 fdchangecnt = 0; 1076 fdchangecnt = 0;
704} 1077}
705 1078
706void inline_size 1079/* something about the given fd changed */
1080inline_size void
707fd_change (EV_P_ int fd, int flags) 1081fd_change (EV_P_ int fd, int flags)
708{ 1082{
709 unsigned char reify = anfds [fd].reify; 1083 unsigned char reify = anfds [fd].reify;
710 anfds [fd].reify |= flags; 1084 anfds [fd].reify |= flags;
711 1085
… …
715 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1089 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
716 fdchanges [fdchangecnt - 1] = fd; 1090 fdchanges [fdchangecnt - 1] = fd;
717 } 1091 }
718} 1092}
719 1093
720void inline_speed 1094/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1095inline_speed void
721fd_kill (EV_P_ int fd) 1096fd_kill (EV_P_ int fd)
722{ 1097{
723 ev_io *w; 1098 ev_io *w;
724 1099
725 while ((w = (ev_io *)anfds [fd].head)) 1100 while ((w = (ev_io *)anfds [fd].head))
… …
727 ev_io_stop (EV_A_ w); 1102 ev_io_stop (EV_A_ w);
728 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1103 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
729 } 1104 }
730} 1105}
731 1106
732int inline_size 1107/* check whether the given fd is actually valid, for error recovery */
1108inline_size int
733fd_valid (int fd) 1109fd_valid (int fd)
734{ 1110{
735#ifdef _WIN32 1111#ifdef _WIN32
736 return _get_osfhandle (fd) != -1; 1112 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
737#else 1113#else
738 return fcntl (fd, F_GETFD) != -1; 1114 return fcntl (fd, F_GETFD) != -1;
739#endif 1115#endif
740} 1116}
741 1117
… …
745{ 1121{
746 int fd; 1122 int fd;
747 1123
748 for (fd = 0; fd < anfdmax; ++fd) 1124 for (fd = 0; fd < anfdmax; ++fd)
749 if (anfds [fd].events) 1125 if (anfds [fd].events)
750 if (!fd_valid (fd) == -1 && errno == EBADF) 1126 if (!fd_valid (fd) && errno == EBADF)
751 fd_kill (EV_A_ fd); 1127 fd_kill (EV_A_ fd);
752} 1128}
753 1129
754/* called on ENOMEM in select/poll to kill some fds and retry */ 1130/* called on ENOMEM in select/poll to kill some fds and retry */
755static void noinline 1131static void noinline
… …
759 1135
760 for (fd = anfdmax; fd--; ) 1136 for (fd = anfdmax; fd--; )
761 if (anfds [fd].events) 1137 if (anfds [fd].events)
762 { 1138 {
763 fd_kill (EV_A_ fd); 1139 fd_kill (EV_A_ fd);
764 return; 1140 break;
765 } 1141 }
766} 1142}
767 1143
768/* usually called after fork if backend needs to re-arm all fds from scratch */ 1144/* usually called after fork if backend needs to re-arm all fds from scratch */
769static void noinline 1145static void noinline
… …
773 1149
774 for (fd = 0; fd < anfdmax; ++fd) 1150 for (fd = 0; fd < anfdmax; ++fd)
775 if (anfds [fd].events) 1151 if (anfds [fd].events)
776 { 1152 {
777 anfds [fd].events = 0; 1153 anfds [fd].events = 0;
1154 anfds [fd].emask = 0;
778 fd_change (EV_A_ fd, EV_IOFDSET | 1); 1155 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
779 } 1156 }
780} 1157}
781 1158
1159/* used to prepare libev internal fd's */
1160/* this is not fork-safe */
1161inline_speed void
1162fd_intern (int fd)
1163{
1164#ifdef _WIN32
1165 unsigned long arg = 1;
1166 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1167#else
1168 fcntl (fd, F_SETFD, FD_CLOEXEC);
1169 fcntl (fd, F_SETFL, O_NONBLOCK);
1170#endif
1171}
1172
782/*****************************************************************************/ 1173/*****************************************************************************/
783 1174
784/* 1175/*
785 * the heap functions want a real array index. array index 0 uis guaranteed to not 1176 * the heap functions want a real array index. array index 0 is guaranteed to not
786 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives 1177 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
787 * the branching factor of the d-tree. 1178 * the branching factor of the d-tree.
788 */ 1179 */
789 1180
790/* 1181/*
791 * at the moment we allow libev the luxury of two heaps, 1182 * at the moment we allow libev the luxury of two heaps,
792 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap 1183 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
793 * which is more cache-efficient. 1184 * which is more cache-efficient.
794 * the difference is about 5% with 50000+ watchers. 1185 * the difference is about 5% with 50000+ watchers.
795 */ 1186 */
796#define EV_USE_4HEAP !EV_MINIMAL
797#if EV_USE_4HEAP 1187#if EV_USE_4HEAP
798 1188
799#define DHEAP 4 1189#define DHEAP 4
800#define HEAP0 (DHEAP - 1) /* index of first element in heap */ 1190#define HEAP0 (DHEAP - 1) /* index of first element in heap */
801 1191#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
802/* towards the root */ 1192#define UPHEAP_DONE(p,k) ((p) == (k))
803void inline_speed
804upheap (ANHE *heap, int k)
805{
806 ANHE he = heap [k];
807
808 for (;;)
809 {
810 int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
811
812 if (p == k || ANHE_at (heap [p]) <= ANHE_at (he))
813 break;
814
815 heap [k] = heap [p];
816 ev_active (ANHE_w (heap [k])) = k;
817 k = p;
818 }
819
820 ev_active (ANHE_w (he)) = k;
821 heap [k] = he;
822}
823 1193
824/* away from the root */ 1194/* away from the root */
825void inline_speed 1195inline_speed void
826downheap (ANHE *heap, int N, int k) 1196downheap (ANHE *heap, int N, int k)
827{ 1197{
828 ANHE he = heap [k]; 1198 ANHE he = heap [k];
829 ANHE *E = heap + N + HEAP0; 1199 ANHE *E = heap + N + HEAP0;
830 1200
831 for (;;) 1201 for (;;)
832 { 1202 {
833 ev_tstamp minat; 1203 ev_tstamp minat;
834 ANHE *minpos; 1204 ANHE *minpos;
835 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0; 1205 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
836 1206
837 // find minimum child 1207 /* find minimum child */
838 if (expect_true (pos + DHEAP - 1 < E)) 1208 if (expect_true (pos + DHEAP - 1 < E))
839 { 1209 {
840 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 1210 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
841 if (ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 1211 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
842 if (ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos)); 1212 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
843 if (ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos)); 1213 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
844 } 1214 }
845 else if (pos < E) 1215 else if (pos < E)
846 { 1216 {
847 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos)); 1217 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
848 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos)); 1218 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
… …
853 break; 1223 break;
854 1224
855 if (ANHE_at (he) <= minat) 1225 if (ANHE_at (he) <= minat)
856 break; 1226 break;
857 1227
1228 heap [k] = *minpos;
858 ev_active (ANHE_w (*minpos)) = k; 1229 ev_active (ANHE_w (*minpos)) = k;
859 heap [k] = *minpos;
860 1230
861 k = minpos - heap; 1231 k = minpos - heap;
862 } 1232 }
863 1233
1234 heap [k] = he;
864 ev_active (ANHE_w (he)) = k; 1235 ev_active (ANHE_w (he)) = k;
865 heap [k] = he;
866} 1236}
867 1237
868#else // 4HEAP 1238#else /* 4HEAP */
869 1239
870#define HEAP0 1 1240#define HEAP0 1
1241#define HPARENT(k) ((k) >> 1)
1242#define UPHEAP_DONE(p,k) (!(p))
871 1243
872/* towards the root */ 1244/* away from the root */
873void inline_speed 1245inline_speed void
874upheap (ANHE *heap, int k) 1246downheap (ANHE *heap, int N, int k)
875{ 1247{
876 ANHE he = heap [k]; 1248 ANHE he = heap [k];
877 1249
878 for (;;) 1250 for (;;)
879 { 1251 {
880 int p = k >> 1; 1252 int c = k << 1;
881 1253
882 /* maybe we could use a dummy element at heap [0]? */ 1254 if (c >= N + HEAP0)
883 if (!p || ANHE_at (heap [p]) <= ANHE_at (he))
884 break; 1255 break;
885 1256
886 heap [k] = heap [p];
887 ev_active (ANHE_w (heap [k])) = k;
888 k = p;
889 }
890
891 heap [k] = w;
892 ev_active (ANHE_w (heap [k])) = k;
893}
894
895/* away from the root */
896void inline_speed
897downheap (ANHE *heap, int N, int k)
898{
899 ANHE he = heap [k];
900
901 for (;;)
902 {
903 int c = k << 1;
904
905 if (c > N)
906 break;
907
908 c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) 1257 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
909 ? 1 : 0; 1258 ? 1 : 0;
910 1259
911 if (w->at <= ANHE_at (heap [c])) 1260 if (ANHE_at (he) <= ANHE_at (heap [c]))
912 break; 1261 break;
913 1262
914 heap [k] = heap [c]; 1263 heap [k] = heap [c];
915 ev_active (ANHE_w (heap [k])) = k; 1264 ev_active (ANHE_w (heap [k])) = k;
916 1265
… …
920 heap [k] = he; 1269 heap [k] = he;
921 ev_active (ANHE_w (he)) = k; 1270 ev_active (ANHE_w (he)) = k;
922} 1271}
923#endif 1272#endif
924 1273
925void inline_size 1274/* towards the root */
1275inline_speed void
1276upheap (ANHE *heap, int k)
1277{
1278 ANHE he = heap [k];
1279
1280 for (;;)
1281 {
1282 int p = HPARENT (k);
1283
1284 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1285 break;
1286
1287 heap [k] = heap [p];
1288 ev_active (ANHE_w (heap [k])) = k;
1289 k = p;
1290 }
1291
1292 heap [k] = he;
1293 ev_active (ANHE_w (he)) = k;
1294}
1295
1296/* move an element suitably so it is in a correct place */
1297inline_size void
926adjustheap (ANHE *heap, int N, int k) 1298adjustheap (ANHE *heap, int N, int k)
927{ 1299{
1300 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
928 upheap (heap, k); 1301 upheap (heap, k);
1302 else
929 downheap (heap, N, k); 1303 downheap (heap, N, k);
1304}
1305
1306/* rebuild the heap: this function is used only once and executed rarely */
1307inline_size void
1308reheap (ANHE *heap, int N)
1309{
1310 int i;
1311
1312 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1313 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1314 for (i = 0; i < N; ++i)
1315 upheap (heap, i + HEAP0);
930} 1316}
931 1317
932/*****************************************************************************/ 1318/*****************************************************************************/
933 1319
1320/* associate signal watchers to a signal signal */
934typedef struct 1321typedef struct
935{ 1322{
1323 EV_ATOMIC_T pending;
1324#if EV_MULTIPLICITY
1325 EV_P;
1326#endif
936 WL head; 1327 WL head;
937 EV_ATOMIC_T gotsig;
938} ANSIG; 1328} ANSIG;
939 1329
940static ANSIG *signals; 1330static ANSIG signals [EV_NSIG - 1];
941static int signalmax;
942
943static EV_ATOMIC_T gotsig;
944
945void inline_size
946signals_init (ANSIG *base, int count)
947{
948 while (count--)
949 {
950 base->head = 0;
951 base->gotsig = 0;
952
953 ++base;
954 }
955}
956 1331
957/*****************************************************************************/ 1332/*****************************************************************************/
958 1333
959void inline_speed 1334#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
960fd_intern (int fd)
961{
962#ifdef _WIN32
963 int arg = 1;
964 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
965#else
966 fcntl (fd, F_SETFD, FD_CLOEXEC);
967 fcntl (fd, F_SETFL, O_NONBLOCK);
968#endif
969}
970 1335
971static void noinline 1336static void noinline
972evpipe_init (EV_P) 1337evpipe_init (EV_P)
973{ 1338{
974 if (!ev_is_active (&pipeev)) 1339 if (!ev_is_active (&pipe_w))
975 { 1340 {
976#if EV_USE_EVENTFD 1341# if EV_USE_EVENTFD
1342 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1343 if (evfd < 0 && errno == EINVAL)
977 if ((evfd = eventfd (0, 0)) >= 0) 1344 evfd = eventfd (0, 0);
1345
1346 if (evfd >= 0)
978 { 1347 {
979 evpipe [0] = -1; 1348 evpipe [0] = -1;
980 fd_intern (evfd); 1349 fd_intern (evfd); /* doing it twice doesn't hurt */
981 ev_io_set (&pipeev, evfd, EV_READ); 1350 ev_io_set (&pipe_w, evfd, EV_READ);
982 } 1351 }
983 else 1352 else
984#endif 1353# endif
985 { 1354 {
986 while (pipe (evpipe)) 1355 while (pipe (evpipe))
987 syserr ("(libev) error creating signal/async pipe"); 1356 ev_syserr ("(libev) error creating signal/async pipe");
988 1357
989 fd_intern (evpipe [0]); 1358 fd_intern (evpipe [0]);
990 fd_intern (evpipe [1]); 1359 fd_intern (evpipe [1]);
991 ev_io_set (&pipeev, evpipe [0], EV_READ); 1360 ev_io_set (&pipe_w, evpipe [0], EV_READ);
992 } 1361 }
993 1362
994 ev_io_start (EV_A_ &pipeev); 1363 ev_io_start (EV_A_ &pipe_w);
995 ev_unref (EV_A); /* watcher should not keep loop alive */ 1364 ev_unref (EV_A); /* watcher should not keep loop alive */
996 } 1365 }
997} 1366}
998 1367
999void inline_size 1368inline_size void
1000evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1369evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1001{ 1370{
1002 if (!*flag) 1371 if (!*flag)
1003 { 1372 {
1004 int old_errno = errno; /* save errno because write might clobber it */
1005
1006 *flag = 1; 1373 *flag = 1;
1007 1374
1375 pipe_write_skipped = 1;
1376
1377 if (pipe_write_wanted)
1378 {
1379 int old_errno = errno; /* save errno because write will clobber it */
1380 char dummy;
1381
1382 pipe_write_skipped = 0;
1383
1384#if EV_USE_EVENTFD
1385 if (evfd >= 0)
1386 {
1387 uint64_t counter = 1;
1388 write (evfd, &counter, sizeof (uint64_t));
1389 }
1390 else
1391#endif
1392 {
1393 /* win32 people keep sending patches that change this write() to send() */
1394 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1395 /* so when you think this write should be a send instead, please find out */
1396 /* where your send() is from - it's definitely not the microsoft send, and */
1397 /* tell me. thank you. */
1398 write (evpipe [1], &dummy, 1);
1399 }
1400
1401 errno = old_errno;
1402 }
1403 }
1404}
1405
1406/* called whenever the libev signal pipe */
1407/* got some events (signal, async) */
1408static void
1409pipecb (EV_P_ ev_io *iow, int revents)
1410{
1411 int i;
1412
1413 if (revents & EV_READ)
1414 {
1008#if EV_USE_EVENTFD 1415#if EV_USE_EVENTFD
1009 if (evfd >= 0) 1416 if (evfd >= 0)
1010 { 1417 {
1011 uint64_t counter = 1; 1418 uint64_t counter;
1012 write (evfd, &counter, sizeof (uint64_t)); 1419 read (evfd, &counter, sizeof (uint64_t));
1013 } 1420 }
1014 else 1421 else
1015#endif 1422#endif
1016 write (evpipe [1], &old_errno, 1); 1423 {
1017
1018 errno = old_errno;
1019 }
1020}
1021
1022static void
1023pipecb (EV_P_ ev_io *iow, int revents)
1024{
1025#if EV_USE_EVENTFD
1026 if (evfd >= 0)
1027 {
1028 uint64_t counter;
1029 read (evfd, &counter, sizeof (uint64_t));
1030 }
1031 else
1032#endif
1033 {
1034 char dummy; 1424 char dummy;
1425 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1035 read (evpipe [0], &dummy, 1); 1426 read (evpipe [0], &dummy, 1);
1427 }
1428 }
1429
1430 pipe_write_skipped = 0;
1431
1432#if EV_SIGNAL_ENABLE
1433 if (sig_pending)
1036 } 1434 {
1435 sig_pending = 0;
1037 1436
1038 if (gotsig && ev_is_default_loop (EV_A)) 1437 for (i = EV_NSIG - 1; i--; )
1039 { 1438 if (expect_false (signals [i].pending))
1040 int signum;
1041 gotsig = 0;
1042
1043 for (signum = signalmax; signum--; )
1044 if (signals [signum].gotsig)
1045 ev_feed_signal_event (EV_A_ signum + 1); 1439 ev_feed_signal_event (EV_A_ i + 1);
1046 } 1440 }
1441#endif
1047 1442
1048#if EV_ASYNC_ENABLE 1443#if EV_ASYNC_ENABLE
1049 if (gotasync) 1444 if (async_pending)
1050 { 1445 {
1051 int i; 1446 async_pending = 0;
1052 gotasync = 0;
1053 1447
1054 for (i = asynccnt; i--; ) 1448 for (i = asynccnt; i--; )
1055 if (asyncs [i]->sent) 1449 if (asyncs [i]->sent)
1056 { 1450 {
1057 asyncs [i]->sent = 0; 1451 asyncs [i]->sent = 0;
… …
1061#endif 1455#endif
1062} 1456}
1063 1457
1064/*****************************************************************************/ 1458/*****************************************************************************/
1065 1459
1460void
1461ev_feed_signal (int signum)
1462{
1463#if EV_MULTIPLICITY
1464 EV_P = signals [signum - 1].loop;
1465
1466 if (!EV_A)
1467 return;
1468#endif
1469
1470 evpipe_init (EV_A);
1471
1472 signals [signum - 1].pending = 1;
1473 evpipe_write (EV_A_ &sig_pending);
1474}
1475
1066static void 1476static void
1067ev_sighandler (int signum) 1477ev_sighandler (int signum)
1068{ 1478{
1069#if EV_MULTIPLICITY
1070 struct ev_loop *loop = &default_loop_struct;
1071#endif
1072
1073#if _WIN32 1479#ifdef _WIN32
1074 signal (signum, ev_sighandler); 1480 signal (signum, ev_sighandler);
1075#endif 1481#endif
1076 1482
1077 signals [signum - 1].gotsig = 1; 1483 ev_feed_signal (signum);
1078 evpipe_write (EV_A_ &gotsig);
1079} 1484}
1080 1485
1081void noinline 1486void noinline
1082ev_feed_signal_event (EV_P_ int signum) 1487ev_feed_signal_event (EV_P_ int signum)
1083{ 1488{
1084 WL w; 1489 WL w;
1085 1490
1491 if (expect_false (signum <= 0 || signum > EV_NSIG))
1492 return;
1493
1494 --signum;
1495
1086#if EV_MULTIPLICITY 1496#if EV_MULTIPLICITY
1087 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr)); 1497 /* it is permissible to try to feed a signal to the wrong loop */
1088#endif 1498 /* or, likely more useful, feeding a signal nobody is waiting for */
1089 1499
1090 --signum; 1500 if (expect_false (signals [signum].loop != EV_A))
1091
1092 if (signum < 0 || signum >= signalmax)
1093 return; 1501 return;
1502#endif
1094 1503
1095 signals [signum].gotsig = 0; 1504 signals [signum].pending = 0;
1096 1505
1097 for (w = signals [signum].head; w; w = w->next) 1506 for (w = signals [signum].head; w; w = w->next)
1098 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1507 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1099} 1508}
1100 1509
1510#if EV_USE_SIGNALFD
1511static void
1512sigfdcb (EV_P_ ev_io *iow, int revents)
1513{
1514 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1515
1516 for (;;)
1517 {
1518 ssize_t res = read (sigfd, si, sizeof (si));
1519
1520 /* not ISO-C, as res might be -1, but works with SuS */
1521 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1522 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1523
1524 if (res < (ssize_t)sizeof (si))
1525 break;
1526 }
1527}
1528#endif
1529
1530#endif
1531
1101/*****************************************************************************/ 1532/*****************************************************************************/
1102 1533
1534#if EV_CHILD_ENABLE
1103static WL childs [EV_PID_HASHSIZE]; 1535static WL childs [EV_PID_HASHSIZE];
1104
1105#ifndef _WIN32
1106 1536
1107static ev_signal childev; 1537static ev_signal childev;
1108 1538
1109#ifndef WIFCONTINUED 1539#ifndef WIFCONTINUED
1110# define WIFCONTINUED(status) 0 1540# define WIFCONTINUED(status) 0
1111#endif 1541#endif
1112 1542
1113void inline_speed 1543/* handle a single child status event */
1544inline_speed void
1114child_reap (EV_P_ int chain, int pid, int status) 1545child_reap (EV_P_ int chain, int pid, int status)
1115{ 1546{
1116 ev_child *w; 1547 ev_child *w;
1117 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 1548 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1118 1549
1119 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1550 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1120 { 1551 {
1121 if ((w->pid == pid || !w->pid) 1552 if ((w->pid == pid || !w->pid)
1122 && (!traced || (w->flags & 1))) 1553 && (!traced || (w->flags & 1)))
1123 { 1554 {
1124 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 1555 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
1131 1562
1132#ifndef WCONTINUED 1563#ifndef WCONTINUED
1133# define WCONTINUED 0 1564# define WCONTINUED 0
1134#endif 1565#endif
1135 1566
1567/* called on sigchld etc., calls waitpid */
1136static void 1568static void
1137childcb (EV_P_ ev_signal *sw, int revents) 1569childcb (EV_P_ ev_signal *sw, int revents)
1138{ 1570{
1139 int pid, status; 1571 int pid, status;
1140 1572
… …
1148 /* make sure we are called again until all children have been reaped */ 1580 /* make sure we are called again until all children have been reaped */
1149 /* we need to do it this way so that the callback gets called before we continue */ 1581 /* we need to do it this way so that the callback gets called before we continue */
1150 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1582 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1151 1583
1152 child_reap (EV_A_ pid, pid, status); 1584 child_reap (EV_A_ pid, pid, status);
1153 if (EV_PID_HASHSIZE > 1) 1585 if ((EV_PID_HASHSIZE) > 1)
1154 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1586 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1155} 1587}
1156 1588
1157#endif 1589#endif
1158 1590
1159/*****************************************************************************/ 1591/*****************************************************************************/
1160 1592
1593#if EV_USE_IOCP
1594# include "ev_iocp.c"
1595#endif
1161#if EV_USE_PORT 1596#if EV_USE_PORT
1162# include "ev_port.c" 1597# include "ev_port.c"
1163#endif 1598#endif
1164#if EV_USE_KQUEUE 1599#if EV_USE_KQUEUE
1165# include "ev_kqueue.c" 1600# include "ev_kqueue.c"
… …
1221 /* kqueue is borked on everything but netbsd apparently */ 1656 /* kqueue is borked on everything but netbsd apparently */
1222 /* it usually doesn't work correctly on anything but sockets and pipes */ 1657 /* it usually doesn't work correctly on anything but sockets and pipes */
1223 flags &= ~EVBACKEND_KQUEUE; 1658 flags &= ~EVBACKEND_KQUEUE;
1224#endif 1659#endif
1225#ifdef __APPLE__ 1660#ifdef __APPLE__
1226 // flags &= ~EVBACKEND_KQUEUE; for documentation 1661 /* only select works correctly on that "unix-certified" platform */
1227 flags &= ~EVBACKEND_POLL; 1662 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1663 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1664#endif
1665#ifdef __FreeBSD__
1666 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1228#endif 1667#endif
1229 1668
1230 return flags; 1669 return flags;
1231} 1670}
1232 1671
… …
1234ev_embeddable_backends (void) 1673ev_embeddable_backends (void)
1235{ 1674{
1236 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 1675 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1237 1676
1238 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 1677 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1239 /* please fix it and tell me how to detect the fix */ 1678 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1240 flags &= ~EVBACKEND_EPOLL; 1679 flags &= ~EVBACKEND_EPOLL;
1241 1680
1242 return flags; 1681 return flags;
1243} 1682}
1244 1683
1245unsigned int 1684unsigned int
1246ev_backend (EV_P) 1685ev_backend (EV_P)
1247{ 1686{
1248 return backend; 1687 return backend;
1249} 1688}
1250 1689
1690#if EV_FEATURE_API
1251unsigned int 1691unsigned int
1252ev_loop_count (EV_P) 1692ev_iteration (EV_P)
1253{ 1693{
1254 return loop_count; 1694 return loop_count;
1255} 1695}
1256 1696
1697unsigned int
1698ev_depth (EV_P)
1699{
1700 return loop_depth;
1701}
1702
1257void 1703void
1258ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 1704ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1259{ 1705{
1260 io_blocktime = interval; 1706 io_blocktime = interval;
1261} 1707}
… …
1264ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 1710ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1265{ 1711{
1266 timeout_blocktime = interval; 1712 timeout_blocktime = interval;
1267} 1713}
1268 1714
1715void
1716ev_set_userdata (EV_P_ void *data)
1717{
1718 userdata = data;
1719}
1720
1721void *
1722ev_userdata (EV_P)
1723{
1724 return userdata;
1725}
1726
1727void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1728{
1729 invoke_cb = invoke_pending_cb;
1730}
1731
1732void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1733{
1734 release_cb = release;
1735 acquire_cb = acquire;
1736}
1737#endif
1738
1739/* initialise a loop structure, must be zero-initialised */
1269static void noinline 1740static void noinline
1270loop_init (EV_P_ unsigned int flags) 1741loop_init (EV_P_ unsigned int flags)
1271{ 1742{
1272 if (!backend) 1743 if (!backend)
1273 { 1744 {
1745 origflags = flags;
1746
1747#if EV_USE_REALTIME
1748 if (!have_realtime)
1749 {
1750 struct timespec ts;
1751
1752 if (!clock_gettime (CLOCK_REALTIME, &ts))
1753 have_realtime = 1;
1754 }
1755#endif
1756
1274#if EV_USE_MONOTONIC 1757#if EV_USE_MONOTONIC
1758 if (!have_monotonic)
1275 { 1759 {
1276 struct timespec ts; 1760 struct timespec ts;
1761
1277 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1762 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1278 have_monotonic = 1; 1763 have_monotonic = 1;
1279 } 1764 }
1280#endif
1281
1282 ev_rt_now = ev_time ();
1283 mn_now = get_clock ();
1284 now_floor = mn_now;
1285 rtmn_diff = ev_rt_now - mn_now;
1286
1287 io_blocktime = 0.;
1288 timeout_blocktime = 0.;
1289 backend = 0;
1290 backend_fd = -1;
1291 gotasync = 0;
1292#if EV_USE_INOTIFY
1293 fs_fd = -2;
1294#endif 1765#endif
1295 1766
1296 /* pid check not overridable via env */ 1767 /* pid check not overridable via env */
1297#ifndef _WIN32 1768#ifndef _WIN32
1298 if (flags & EVFLAG_FORKCHECK) 1769 if (flags & EVFLAG_FORKCHECK)
… …
1302 if (!(flags & EVFLAG_NOENV) 1773 if (!(flags & EVFLAG_NOENV)
1303 && !enable_secure () 1774 && !enable_secure ()
1304 && getenv ("LIBEV_FLAGS")) 1775 && getenv ("LIBEV_FLAGS"))
1305 flags = atoi (getenv ("LIBEV_FLAGS")); 1776 flags = atoi (getenv ("LIBEV_FLAGS"));
1306 1777
1307 if (!(flags & 0x0000ffffU)) 1778 ev_rt_now = ev_time ();
1779 mn_now = get_clock ();
1780 now_floor = mn_now;
1781 rtmn_diff = ev_rt_now - mn_now;
1782#if EV_FEATURE_API
1783 invoke_cb = ev_invoke_pending;
1784#endif
1785
1786 io_blocktime = 0.;
1787 timeout_blocktime = 0.;
1788 backend = 0;
1789 backend_fd = -1;
1790 sig_pending = 0;
1791#if EV_ASYNC_ENABLE
1792 async_pending = 0;
1793#endif
1794 pipe_write_skipped = 0;
1795 pipe_write_wanted = 0;
1796#if EV_USE_INOTIFY
1797 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1798#endif
1799#if EV_USE_SIGNALFD
1800 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1801#endif
1802
1803 if (!(flags & EVBACKEND_MASK))
1308 flags |= ev_recommended_backends (); 1804 flags |= ev_recommended_backends ();
1309 1805
1806#if EV_USE_IOCP
1807 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1808#endif
1310#if EV_USE_PORT 1809#if EV_USE_PORT
1311 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1810 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1312#endif 1811#endif
1313#if EV_USE_KQUEUE 1812#if EV_USE_KQUEUE
1314 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1813 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1321#endif 1820#endif
1322#if EV_USE_SELECT 1821#if EV_USE_SELECT
1323 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1822 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1324#endif 1823#endif
1325 1824
1825 ev_prepare_init (&pending_w, pendingcb);
1826
1827#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1326 ev_init (&pipeev, pipecb); 1828 ev_init (&pipe_w, pipecb);
1327 ev_set_priority (&pipeev, EV_MAXPRI); 1829 ev_set_priority (&pipe_w, EV_MAXPRI);
1830#endif
1328 } 1831 }
1329} 1832}
1330 1833
1331static void noinline 1834/* free up a loop structure */
1835void
1332loop_destroy (EV_P) 1836ev_loop_destroy (EV_P)
1333{ 1837{
1334 int i; 1838 int i;
1335 1839
1840#if EV_MULTIPLICITY
1841 /* mimic free (0) */
1842 if (!EV_A)
1843 return;
1844#endif
1845
1846#if EV_CLEANUP_ENABLE
1847 /* queue cleanup watchers (and execute them) */
1848 if (expect_false (cleanupcnt))
1849 {
1850 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1851 EV_INVOKE_PENDING;
1852 }
1853#endif
1854
1855#if EV_CHILD_ENABLE
1856 if (ev_is_active (&childev))
1857 {
1858 ev_ref (EV_A); /* child watcher */
1859 ev_signal_stop (EV_A_ &childev);
1860 }
1861#endif
1862
1336 if (ev_is_active (&pipeev)) 1863 if (ev_is_active (&pipe_w))
1337 { 1864 {
1338 ev_ref (EV_A); /* signal watcher */ 1865 /*ev_ref (EV_A);*/
1339 ev_io_stop (EV_A_ &pipeev); 1866 /*ev_io_stop (EV_A_ &pipe_w);*/
1340 1867
1341#if EV_USE_EVENTFD 1868#if EV_USE_EVENTFD
1342 if (evfd >= 0) 1869 if (evfd >= 0)
1343 close (evfd); 1870 close (evfd);
1344#endif 1871#endif
1345 1872
1346 if (evpipe [0] >= 0) 1873 if (evpipe [0] >= 0)
1347 { 1874 {
1348 close (evpipe [0]); 1875 EV_WIN32_CLOSE_FD (evpipe [0]);
1349 close (evpipe [1]); 1876 EV_WIN32_CLOSE_FD (evpipe [1]);
1350 } 1877 }
1351 } 1878 }
1879
1880#if EV_USE_SIGNALFD
1881 if (ev_is_active (&sigfd_w))
1882 close (sigfd);
1883#endif
1352 1884
1353#if EV_USE_INOTIFY 1885#if EV_USE_INOTIFY
1354 if (fs_fd >= 0) 1886 if (fs_fd >= 0)
1355 close (fs_fd); 1887 close (fs_fd);
1356#endif 1888#endif
1357 1889
1358 if (backend_fd >= 0) 1890 if (backend_fd >= 0)
1359 close (backend_fd); 1891 close (backend_fd);
1360 1892
1893#if EV_USE_IOCP
1894 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1895#endif
1361#if EV_USE_PORT 1896#if EV_USE_PORT
1362 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1897 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1363#endif 1898#endif
1364#if EV_USE_KQUEUE 1899#if EV_USE_KQUEUE
1365 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 1900 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1380#if EV_IDLE_ENABLE 1915#if EV_IDLE_ENABLE
1381 array_free (idle, [i]); 1916 array_free (idle, [i]);
1382#endif 1917#endif
1383 } 1918 }
1384 1919
1385 ev_free (anfds); anfdmax = 0; 1920 ev_free (anfds); anfds = 0; anfdmax = 0;
1386 1921
1387 /* have to use the microsoft-never-gets-it-right macro */ 1922 /* have to use the microsoft-never-gets-it-right macro */
1923 array_free (rfeed, EMPTY);
1388 array_free (fdchange, EMPTY); 1924 array_free (fdchange, EMPTY);
1389 array_free (timer, EMPTY); 1925 array_free (timer, EMPTY);
1390#if EV_PERIODIC_ENABLE 1926#if EV_PERIODIC_ENABLE
1391 array_free (periodic, EMPTY); 1927 array_free (periodic, EMPTY);
1392#endif 1928#endif
1393#if EV_FORK_ENABLE 1929#if EV_FORK_ENABLE
1394 array_free (fork, EMPTY); 1930 array_free (fork, EMPTY);
1395#endif 1931#endif
1932#if EV_CLEANUP_ENABLE
1933 array_free (cleanup, EMPTY);
1934#endif
1396 array_free (prepare, EMPTY); 1935 array_free (prepare, EMPTY);
1397 array_free (check, EMPTY); 1936 array_free (check, EMPTY);
1398#if EV_ASYNC_ENABLE 1937#if EV_ASYNC_ENABLE
1399 array_free (async, EMPTY); 1938 array_free (async, EMPTY);
1400#endif 1939#endif
1401 1940
1402 backend = 0; 1941 backend = 0;
1942
1943#if EV_MULTIPLICITY
1944 if (ev_is_default_loop (EV_A))
1945#endif
1946 ev_default_loop_ptr = 0;
1947#if EV_MULTIPLICITY
1948 else
1949 ev_free (EV_A);
1950#endif
1403} 1951}
1404 1952
1405#if EV_USE_INOTIFY 1953#if EV_USE_INOTIFY
1406void inline_size infy_fork (EV_P); 1954inline_size void infy_fork (EV_P);
1407#endif 1955#endif
1408 1956
1409void inline_size 1957inline_size void
1410loop_fork (EV_P) 1958loop_fork (EV_P)
1411{ 1959{
1412#if EV_USE_PORT 1960#if EV_USE_PORT
1413 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 1961 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1414#endif 1962#endif
… …
1420#endif 1968#endif
1421#if EV_USE_INOTIFY 1969#if EV_USE_INOTIFY
1422 infy_fork (EV_A); 1970 infy_fork (EV_A);
1423#endif 1971#endif
1424 1972
1425 if (ev_is_active (&pipeev)) 1973 if (ev_is_active (&pipe_w))
1426 { 1974 {
1427 /* this "locks" the handlers against writing to the pipe */ 1975 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1428 /* while we modify the fd vars */
1429 gotsig = 1;
1430#if EV_ASYNC_ENABLE
1431 gotasync = 1;
1432#endif
1433 1976
1434 ev_ref (EV_A); 1977 ev_ref (EV_A);
1435 ev_io_stop (EV_A_ &pipeev); 1978 ev_io_stop (EV_A_ &pipe_w);
1436 1979
1437#if EV_USE_EVENTFD 1980#if EV_USE_EVENTFD
1438 if (evfd >= 0) 1981 if (evfd >= 0)
1439 close (evfd); 1982 close (evfd);
1440#endif 1983#endif
1441 1984
1442 if (evpipe [0] >= 0) 1985 if (evpipe [0] >= 0)
1443 { 1986 {
1444 close (evpipe [0]); 1987 EV_WIN32_CLOSE_FD (evpipe [0]);
1445 close (evpipe [1]); 1988 EV_WIN32_CLOSE_FD (evpipe [1]);
1446 } 1989 }
1447 1990
1991#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1448 evpipe_init (EV_A); 1992 evpipe_init (EV_A);
1449 /* now iterate over everything, in case we missed something */ 1993 /* now iterate over everything, in case we missed something */
1450 pipecb (EV_A_ &pipeev, EV_READ); 1994 pipecb (EV_A_ &pipe_w, EV_READ);
1995#endif
1451 } 1996 }
1452 1997
1453 postfork = 0; 1998 postfork = 0;
1454} 1999}
2000
2001#if EV_MULTIPLICITY
2002
2003struct ev_loop *
2004ev_loop_new (unsigned int flags)
2005{
2006 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2007
2008 memset (EV_A, 0, sizeof (struct ev_loop));
2009 loop_init (EV_A_ flags);
2010
2011 if (ev_backend (EV_A))
2012 return EV_A;
2013
2014 ev_free (EV_A);
2015 return 0;
2016}
2017
2018#endif /* multiplicity */
2019
2020#if EV_VERIFY
2021static void noinline
2022verify_watcher (EV_P_ W w)
2023{
2024 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2025
2026 if (w->pending)
2027 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2028}
2029
2030static void noinline
2031verify_heap (EV_P_ ANHE *heap, int N)
2032{
2033 int i;
2034
2035 for (i = HEAP0; i < N + HEAP0; ++i)
2036 {
2037 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2038 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2039 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2040
2041 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2042 }
2043}
2044
2045static void noinline
2046array_verify (EV_P_ W *ws, int cnt)
2047{
2048 while (cnt--)
2049 {
2050 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2051 verify_watcher (EV_A_ ws [cnt]);
2052 }
2053}
2054#endif
2055
2056#if EV_FEATURE_API
2057void
2058ev_verify (EV_P)
2059{
2060#if EV_VERIFY
2061 int i;
2062 WL w;
2063
2064 assert (activecnt >= -1);
2065
2066 assert (fdchangemax >= fdchangecnt);
2067 for (i = 0; i < fdchangecnt; ++i)
2068 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2069
2070 assert (anfdmax >= 0);
2071 for (i = 0; i < anfdmax; ++i)
2072 for (w = anfds [i].head; w; w = w->next)
2073 {
2074 verify_watcher (EV_A_ (W)w);
2075 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2076 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2077 }
2078
2079 assert (timermax >= timercnt);
2080 verify_heap (EV_A_ timers, timercnt);
2081
2082#if EV_PERIODIC_ENABLE
2083 assert (periodicmax >= periodiccnt);
2084 verify_heap (EV_A_ periodics, periodiccnt);
2085#endif
2086
2087 for (i = NUMPRI; i--; )
2088 {
2089 assert (pendingmax [i] >= pendingcnt [i]);
2090#if EV_IDLE_ENABLE
2091 assert (idleall >= 0);
2092 assert (idlemax [i] >= idlecnt [i]);
2093 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2094#endif
2095 }
2096
2097#if EV_FORK_ENABLE
2098 assert (forkmax >= forkcnt);
2099 array_verify (EV_A_ (W *)forks, forkcnt);
2100#endif
2101
2102#if EV_CLEANUP_ENABLE
2103 assert (cleanupmax >= cleanupcnt);
2104 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2105#endif
2106
2107#if EV_ASYNC_ENABLE
2108 assert (asyncmax >= asynccnt);
2109 array_verify (EV_A_ (W *)asyncs, asynccnt);
2110#endif
2111
2112#if EV_PREPARE_ENABLE
2113 assert (preparemax >= preparecnt);
2114 array_verify (EV_A_ (W *)prepares, preparecnt);
2115#endif
2116
2117#if EV_CHECK_ENABLE
2118 assert (checkmax >= checkcnt);
2119 array_verify (EV_A_ (W *)checks, checkcnt);
2120#endif
2121
2122# if 0
2123#if EV_CHILD_ENABLE
2124 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2125 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2126#endif
2127# endif
2128#endif
2129}
2130#endif
1455 2131
1456#if EV_MULTIPLICITY 2132#if EV_MULTIPLICITY
1457struct ev_loop * 2133struct ev_loop *
1458ev_loop_new (unsigned int flags)
1459{
1460 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1461
1462 memset (loop, 0, sizeof (struct ev_loop));
1463
1464 loop_init (EV_A_ flags);
1465
1466 if (ev_backend (EV_A))
1467 return loop;
1468
1469 return 0;
1470}
1471
1472void
1473ev_loop_destroy (EV_P)
1474{
1475 loop_destroy (EV_A);
1476 ev_free (loop);
1477}
1478
1479void
1480ev_loop_fork (EV_P)
1481{
1482 postfork = 1; /* must be in line with ev_default_fork */
1483}
1484#endif
1485
1486#if EV_MULTIPLICITY
1487struct ev_loop *
1488ev_default_loop_init (unsigned int flags)
1489#else 2134#else
1490int 2135int
2136#endif
1491ev_default_loop (unsigned int flags) 2137ev_default_loop (unsigned int flags)
1492#endif
1493{ 2138{
1494 if (!ev_default_loop_ptr) 2139 if (!ev_default_loop_ptr)
1495 { 2140 {
1496#if EV_MULTIPLICITY 2141#if EV_MULTIPLICITY
1497 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2142 EV_P = ev_default_loop_ptr = &default_loop_struct;
1498#else 2143#else
1499 ev_default_loop_ptr = 1; 2144 ev_default_loop_ptr = 1;
1500#endif 2145#endif
1501 2146
1502 loop_init (EV_A_ flags); 2147 loop_init (EV_A_ flags);
1503 2148
1504 if (ev_backend (EV_A)) 2149 if (ev_backend (EV_A))
1505 { 2150 {
1506#ifndef _WIN32 2151#if EV_CHILD_ENABLE
1507 ev_signal_init (&childev, childcb, SIGCHLD); 2152 ev_signal_init (&childev, childcb, SIGCHLD);
1508 ev_set_priority (&childev, EV_MAXPRI); 2153 ev_set_priority (&childev, EV_MAXPRI);
1509 ev_signal_start (EV_A_ &childev); 2154 ev_signal_start (EV_A_ &childev);
1510 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2155 ev_unref (EV_A); /* child watcher should not keep loop alive */
1511#endif 2156#endif
… …
1516 2161
1517 return ev_default_loop_ptr; 2162 return ev_default_loop_ptr;
1518} 2163}
1519 2164
1520void 2165void
1521ev_default_destroy (void) 2166ev_loop_fork (EV_P)
1522{ 2167{
1523#if EV_MULTIPLICITY
1524 struct ev_loop *loop = ev_default_loop_ptr;
1525#endif
1526
1527#ifndef _WIN32
1528 ev_ref (EV_A); /* child watcher */
1529 ev_signal_stop (EV_A_ &childev);
1530#endif
1531
1532 loop_destroy (EV_A);
1533}
1534
1535void
1536ev_default_fork (void)
1537{
1538#if EV_MULTIPLICITY
1539 struct ev_loop *loop = ev_default_loop_ptr;
1540#endif
1541
1542 if (backend)
1543 postfork = 1; /* must be in line with ev_loop_fork */ 2168 postfork = 1; /* must be in line with ev_default_fork */
1544} 2169}
1545 2170
1546/*****************************************************************************/ 2171/*****************************************************************************/
1547 2172
1548void 2173void
1549ev_invoke (EV_P_ void *w, int revents) 2174ev_invoke (EV_P_ void *w, int revents)
1550{ 2175{
1551 EV_CB_INVOKE ((W)w, revents); 2176 EV_CB_INVOKE ((W)w, revents);
1552} 2177}
1553 2178
1554void inline_speed 2179unsigned int
1555call_pending (EV_P) 2180ev_pending_count (EV_P)
2181{
2182 int pri;
2183 unsigned int count = 0;
2184
2185 for (pri = NUMPRI; pri--; )
2186 count += pendingcnt [pri];
2187
2188 return count;
2189}
2190
2191void noinline
2192ev_invoke_pending (EV_P)
1556{ 2193{
1557 int pri; 2194 int pri;
1558 2195
1559 for (pri = NUMPRI; pri--; ) 2196 for (pri = NUMPRI; pri--; )
1560 while (pendingcnt [pri]) 2197 while (pendingcnt [pri])
1561 { 2198 {
1562 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2199 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1563 2200
1564 if (expect_true (p->w))
1565 {
1566 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1567
1568 p->w->pending = 0; 2201 p->w->pending = 0;
1569 EV_CB_INVOKE (p->w, p->events); 2202 EV_CB_INVOKE (p->w, p->events);
1570 } 2203 EV_FREQUENT_CHECK;
1571 } 2204 }
1572} 2205}
1573 2206
1574#if EV_IDLE_ENABLE 2207#if EV_IDLE_ENABLE
1575void inline_size 2208/* make idle watchers pending. this handles the "call-idle */
2209/* only when higher priorities are idle" logic */
2210inline_size void
1576idle_reify (EV_P) 2211idle_reify (EV_P)
1577{ 2212{
1578 if (expect_false (idleall)) 2213 if (expect_false (idleall))
1579 { 2214 {
1580 int pri; 2215 int pri;
… …
1592 } 2227 }
1593 } 2228 }
1594} 2229}
1595#endif 2230#endif
1596 2231
1597void inline_size 2232/* make timers pending */
2233inline_size void
1598timers_reify (EV_P) 2234timers_reify (EV_P)
1599{ 2235{
2236 EV_FREQUENT_CHECK;
2237
1600 while (timercnt && ANHE_at (timers [HEAP0]) <= mn_now) 2238 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1601 { 2239 {
1602 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]); 2240 do
1603
1604 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1605
1606 /* first reschedule or stop timer */
1607 if (w->repeat)
1608 { 2241 {
2242 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2243
2244 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2245
2246 /* first reschedule or stop timer */
2247 if (w->repeat)
2248 {
2249 ev_at (w) += w->repeat;
2250 if (ev_at (w) < mn_now)
2251 ev_at (w) = mn_now;
2252
1609 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2253 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1610 2254
1611 ev_at (w) += w->repeat;
1612 if (ev_at (w) < mn_now)
1613 ev_at (w) = mn_now;
1614
1615 ANHE_at_set (timers [HEAP0]); 2255 ANHE_at_cache (timers [HEAP0]);
1616 downheap (timers, timercnt, HEAP0); 2256 downheap (timers, timercnt, HEAP0);
2257 }
2258 else
2259 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2260
2261 EV_FREQUENT_CHECK;
2262 feed_reverse (EV_A_ (W)w);
1617 } 2263 }
1618 else 2264 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1619 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1620 2265
1621 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2266 feed_reverse_done (EV_A_ EV_TIMER);
1622 } 2267 }
1623} 2268}
1624 2269
1625#if EV_PERIODIC_ENABLE 2270#if EV_PERIODIC_ENABLE
1626void inline_size 2271
2272static void noinline
2273periodic_recalc (EV_P_ ev_periodic *w)
2274{
2275 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2276 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2277
2278 /* the above almost always errs on the low side */
2279 while (at <= ev_rt_now)
2280 {
2281 ev_tstamp nat = at + w->interval;
2282
2283 /* when resolution fails us, we use ev_rt_now */
2284 if (expect_false (nat == at))
2285 {
2286 at = ev_rt_now;
2287 break;
2288 }
2289
2290 at = nat;
2291 }
2292
2293 ev_at (w) = at;
2294}
2295
2296/* make periodics pending */
2297inline_size void
1627periodics_reify (EV_P) 2298periodics_reify (EV_P)
1628{ 2299{
2300 EV_FREQUENT_CHECK;
2301
1629 while (periodiccnt && ANHE_at (periodics [HEAP0]) <= ev_rt_now) 2302 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1630 { 2303 {
1631 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 2304 int feed_count = 0;
1632 2305
1633 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/ 2306 do
1634
1635 /* first reschedule or stop timer */
1636 if (w->reschedule_cb)
1637 { 2307 {
2308 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2309
2310 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2311
2312 /* first reschedule or stop timer */
2313 if (w->reschedule_cb)
2314 {
1638 ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON); 2315 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2316
1639 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now)); 2317 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2318
1640 ANHE_at_set (periodics [HEAP0]); 2319 ANHE_at_cache (periodics [HEAP0]);
1641 downheap (periodics, periodiccnt, HEAP0); 2320 downheap (periodics, periodiccnt, HEAP0);
2321 }
2322 else if (w->interval)
2323 {
2324 periodic_recalc (EV_A_ w);
2325 ANHE_at_cache (periodics [HEAP0]);
2326 downheap (periodics, periodiccnt, HEAP0);
2327 }
2328 else
2329 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2330
2331 EV_FREQUENT_CHECK;
2332 feed_reverse (EV_A_ (W)w);
1642 } 2333 }
1643 else if (w->interval) 2334 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1644 {
1645 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1646 if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
1647 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
1648 ANHE_at_set (periodics [HEAP0]);
1649 downheap (periodics, periodiccnt, HEAP0);
1650 }
1651 else
1652 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1653 2335
1654 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 2336 feed_reverse_done (EV_A_ EV_PERIODIC);
1655 } 2337 }
1656} 2338}
1657 2339
2340/* simply recalculate all periodics */
2341/* TODO: maybe ensure that at least one event happens when jumping forward? */
1658static void noinline 2342static void noinline
1659periodics_reschedule (EV_P) 2343periodics_reschedule (EV_P)
1660{ 2344{
1661 int i; 2345 int i;
1662 2346
… …
1666 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 2350 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1667 2351
1668 if (w->reschedule_cb) 2352 if (w->reschedule_cb)
1669 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2353 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1670 else if (w->interval) 2354 else if (w->interval)
1671 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2355 periodic_recalc (EV_A_ w);
1672 2356
1673 ANHE_at_set (periodics [i]); 2357 ANHE_at_cache (periodics [i]);
2358 }
2359
2360 reheap (periodics, periodiccnt);
2361}
2362#endif
2363
2364/* adjust all timers by a given offset */
2365static void noinline
2366timers_reschedule (EV_P_ ev_tstamp adjust)
2367{
2368 int i;
2369
2370 for (i = 0; i < timercnt; ++i)
1674 } 2371 {
1675 2372 ANHE *he = timers + i + HEAP0;
1676 /* now rebuild the heap, this for the 2-heap, inefficient for the 4-heap, but correct */ 2373 ANHE_w (*he)->at += adjust;
1677 for (i = periodiccnt >> 1; --i; ) 2374 ANHE_at_cache (*he);
1678 downheap (periodics, periodiccnt, i + HEAP0); 2375 }
1679} 2376}
1680#endif
1681 2377
1682void inline_speed 2378/* fetch new monotonic and realtime times from the kernel */
2379/* also detect if there was a timejump, and act accordingly */
2380inline_speed void
1683time_update (EV_P_ ev_tstamp max_block) 2381time_update (EV_P_ ev_tstamp max_block)
1684{ 2382{
1685 int i;
1686
1687#if EV_USE_MONOTONIC 2383#if EV_USE_MONOTONIC
1688 if (expect_true (have_monotonic)) 2384 if (expect_true (have_monotonic))
1689 { 2385 {
2386 int i;
1690 ev_tstamp odiff = rtmn_diff; 2387 ev_tstamp odiff = rtmn_diff;
1691 2388
1692 mn_now = get_clock (); 2389 mn_now = get_clock ();
1693 2390
1694 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 2391 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1710 * doesn't hurt either as we only do this on time-jumps or 2407 * doesn't hurt either as we only do this on time-jumps or
1711 * in the unlikely event of having been preempted here. 2408 * in the unlikely event of having been preempted here.
1712 */ 2409 */
1713 for (i = 4; --i; ) 2410 for (i = 4; --i; )
1714 { 2411 {
2412 ev_tstamp diff;
1715 rtmn_diff = ev_rt_now - mn_now; 2413 rtmn_diff = ev_rt_now - mn_now;
1716 2414
2415 diff = odiff - rtmn_diff;
2416
1717 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 2417 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1718 return; /* all is well */ 2418 return; /* all is well */
1719 2419
1720 ev_rt_now = ev_time (); 2420 ev_rt_now = ev_time ();
1721 mn_now = get_clock (); 2421 mn_now = get_clock ();
1722 now_floor = mn_now; 2422 now_floor = mn_now;
1723 } 2423 }
1724 2424
2425 /* no timer adjustment, as the monotonic clock doesn't jump */
2426 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1725# if EV_PERIODIC_ENABLE 2427# if EV_PERIODIC_ENABLE
1726 periodics_reschedule (EV_A); 2428 periodics_reschedule (EV_A);
1727# endif 2429# endif
1728 /* no timer adjustment, as the monotonic clock doesn't jump */
1729 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1730 } 2430 }
1731 else 2431 else
1732#endif 2432#endif
1733 { 2433 {
1734 ev_rt_now = ev_time (); 2434 ev_rt_now = ev_time ();
1735 2435
1736 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 2436 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1737 { 2437 {
2438 /* adjust timers. this is easy, as the offset is the same for all of them */
2439 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1738#if EV_PERIODIC_ENABLE 2440#if EV_PERIODIC_ENABLE
1739 periodics_reschedule (EV_A); 2441 periodics_reschedule (EV_A);
1740#endif 2442#endif
1741 /* adjust timers. this is easy, as the offset is the same for all of them */
1742 for (i = 0; i < timercnt; ++i)
1743 {
1744 ANHE *he = timers + i + HEAP0;
1745 ANHE_w (*he)->at += ev_rt_now - mn_now;
1746 ANHE_at_set (*he);
1747 }
1748 } 2443 }
1749 2444
1750 mn_now = ev_rt_now; 2445 mn_now = ev_rt_now;
1751 } 2446 }
1752} 2447}
1753 2448
1754void 2449void
1755ev_ref (EV_P)
1756{
1757 ++activecnt;
1758}
1759
1760void
1761ev_unref (EV_P)
1762{
1763 --activecnt;
1764}
1765
1766static int loop_done;
1767
1768void
1769ev_loop (EV_P_ int flags) 2450ev_run (EV_P_ int flags)
1770{ 2451{
2452#if EV_FEATURE_API
2453 ++loop_depth;
2454#endif
2455
2456 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2457
1771 loop_done = EVUNLOOP_CANCEL; 2458 loop_done = EVBREAK_CANCEL;
1772 2459
1773 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2460 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1774 2461
1775 do 2462 do
1776 { 2463 {
2464#if EV_VERIFY >= 2
2465 ev_verify (EV_A);
2466#endif
2467
1777#ifndef _WIN32 2468#ifndef _WIN32
1778 if (expect_false (curpid)) /* penalise the forking check even more */ 2469 if (expect_false (curpid)) /* penalise the forking check even more */
1779 if (expect_false (getpid () != curpid)) 2470 if (expect_false (getpid () != curpid))
1780 { 2471 {
1781 curpid = getpid (); 2472 curpid = getpid ();
… …
1787 /* we might have forked, so queue fork handlers */ 2478 /* we might have forked, so queue fork handlers */
1788 if (expect_false (postfork)) 2479 if (expect_false (postfork))
1789 if (forkcnt) 2480 if (forkcnt)
1790 { 2481 {
1791 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2482 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1792 call_pending (EV_A); 2483 EV_INVOKE_PENDING;
1793 } 2484 }
1794#endif 2485#endif
1795 2486
2487#if EV_PREPARE_ENABLE
1796 /* queue prepare watchers (and execute them) */ 2488 /* queue prepare watchers (and execute them) */
1797 if (expect_false (preparecnt)) 2489 if (expect_false (preparecnt))
1798 { 2490 {
1799 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2491 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1800 call_pending (EV_A); 2492 EV_INVOKE_PENDING;
1801 } 2493 }
2494#endif
1802 2495
1803 if (expect_false (!activecnt)) 2496 if (expect_false (loop_done))
1804 break; 2497 break;
1805 2498
1806 /* we might have forked, so reify kernel state if necessary */ 2499 /* we might have forked, so reify kernel state if necessary */
1807 if (expect_false (postfork)) 2500 if (expect_false (postfork))
1808 loop_fork (EV_A); 2501 loop_fork (EV_A);
… …
1813 /* calculate blocking time */ 2506 /* calculate blocking time */
1814 { 2507 {
1815 ev_tstamp waittime = 0.; 2508 ev_tstamp waittime = 0.;
1816 ev_tstamp sleeptime = 0.; 2509 ev_tstamp sleeptime = 0.;
1817 2510
2511 /* remember old timestamp for io_blocktime calculation */
2512 ev_tstamp prev_mn_now = mn_now;
2513
2514 /* update time to cancel out callback processing overhead */
2515 time_update (EV_A_ 1e100);
2516
2517 /* from now on, we want a pipe-wake-up */
2518 pipe_write_wanted = 1;
2519
1818 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 2520 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1819 { 2521 {
1820 /* update time to cancel out callback processing overhead */
1821 time_update (EV_A_ 1e100);
1822
1823 waittime = MAX_BLOCKTIME; 2522 waittime = MAX_BLOCKTIME;
1824 2523
1825 if (timercnt) 2524 if (timercnt)
1826 { 2525 {
1827 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 2526 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1828 if (waittime > to) waittime = to; 2527 if (waittime > to) waittime = to;
1829 } 2528 }
1830 2529
1831#if EV_PERIODIC_ENABLE 2530#if EV_PERIODIC_ENABLE
1832 if (periodiccnt) 2531 if (periodiccnt)
1833 { 2532 {
1834 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 2533 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1835 if (waittime > to) waittime = to; 2534 if (waittime > to) waittime = to;
1836 } 2535 }
1837#endif 2536#endif
1838 2537
2538 /* don't let timeouts decrease the waittime below timeout_blocktime */
1839 if (expect_false (waittime < timeout_blocktime)) 2539 if (expect_false (waittime < timeout_blocktime))
1840 waittime = timeout_blocktime; 2540 waittime = timeout_blocktime;
1841 2541
1842 sleeptime = waittime - backend_fudge; 2542 /* at this point, we NEED to wait, so we have to ensure */
2543 /* to pass a minimum nonzero value to the backend */
2544 if (expect_false (waittime < backend_mintime))
2545 waittime = backend_mintime;
1843 2546
2547 /* extra check because io_blocktime is commonly 0 */
1844 if (expect_true (sleeptime > io_blocktime)) 2548 if (expect_false (io_blocktime))
1845 sleeptime = io_blocktime;
1846
1847 if (sleeptime)
1848 { 2549 {
2550 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2551
2552 if (sleeptime > waittime - backend_mintime)
2553 sleeptime = waittime - backend_mintime;
2554
2555 if (expect_true (sleeptime > 0.))
2556 {
1849 ev_sleep (sleeptime); 2557 ev_sleep (sleeptime);
1850 waittime -= sleeptime; 2558 waittime -= sleeptime;
2559 }
1851 } 2560 }
1852 } 2561 }
1853 2562
2563#if EV_FEATURE_API
1854 ++loop_count; 2564 ++loop_count;
2565#endif
2566 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1855 backend_poll (EV_A_ waittime); 2567 backend_poll (EV_A_ waittime);
2568 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2569
2570 pipe_write_wanted = 0;
2571
2572 if (pipe_write_skipped)
2573 {
2574 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2575 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2576 }
2577
1856 2578
1857 /* update ev_rt_now, do magic */ 2579 /* update ev_rt_now, do magic */
1858 time_update (EV_A_ waittime + sleeptime); 2580 time_update (EV_A_ waittime + sleeptime);
1859 } 2581 }
1860 2582
… …
1867#if EV_IDLE_ENABLE 2589#if EV_IDLE_ENABLE
1868 /* queue idle watchers unless other events are pending */ 2590 /* queue idle watchers unless other events are pending */
1869 idle_reify (EV_A); 2591 idle_reify (EV_A);
1870#endif 2592#endif
1871 2593
2594#if EV_CHECK_ENABLE
1872 /* queue check watchers, to be executed first */ 2595 /* queue check watchers, to be executed first */
1873 if (expect_false (checkcnt)) 2596 if (expect_false (checkcnt))
1874 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2597 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2598#endif
1875 2599
1876 call_pending (EV_A); 2600 EV_INVOKE_PENDING;
1877 } 2601 }
1878 while (expect_true ( 2602 while (expect_true (
1879 activecnt 2603 activecnt
1880 && !loop_done 2604 && !loop_done
1881 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 2605 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
1882 )); 2606 ));
1883 2607
1884 if (loop_done == EVUNLOOP_ONE) 2608 if (loop_done == EVBREAK_ONE)
1885 loop_done = EVUNLOOP_CANCEL; 2609 loop_done = EVBREAK_CANCEL;
1886}
1887 2610
2611#if EV_FEATURE_API
2612 --loop_depth;
2613#endif
2614}
2615
1888void 2616void
1889ev_unloop (EV_P_ int how) 2617ev_break (EV_P_ int how)
1890{ 2618{
1891 loop_done = how; 2619 loop_done = how;
1892} 2620}
1893 2621
2622void
2623ev_ref (EV_P)
2624{
2625 ++activecnt;
2626}
2627
2628void
2629ev_unref (EV_P)
2630{
2631 --activecnt;
2632}
2633
2634void
2635ev_now_update (EV_P)
2636{
2637 time_update (EV_A_ 1e100);
2638}
2639
2640void
2641ev_suspend (EV_P)
2642{
2643 ev_now_update (EV_A);
2644}
2645
2646void
2647ev_resume (EV_P)
2648{
2649 ev_tstamp mn_prev = mn_now;
2650
2651 ev_now_update (EV_A);
2652 timers_reschedule (EV_A_ mn_now - mn_prev);
2653#if EV_PERIODIC_ENABLE
2654 /* TODO: really do this? */
2655 periodics_reschedule (EV_A);
2656#endif
2657}
2658
1894/*****************************************************************************/ 2659/*****************************************************************************/
2660/* singly-linked list management, used when the expected list length is short */
1895 2661
1896void inline_size 2662inline_size void
1897wlist_add (WL *head, WL elem) 2663wlist_add (WL *head, WL elem)
1898{ 2664{
1899 elem->next = *head; 2665 elem->next = *head;
1900 *head = elem; 2666 *head = elem;
1901} 2667}
1902 2668
1903void inline_size 2669inline_size void
1904wlist_del (WL *head, WL elem) 2670wlist_del (WL *head, WL elem)
1905{ 2671{
1906 while (*head) 2672 while (*head)
1907 { 2673 {
1908 if (*head == elem) 2674 if (expect_true (*head == elem))
1909 { 2675 {
1910 *head = elem->next; 2676 *head = elem->next;
1911 return; 2677 break;
1912 } 2678 }
1913 2679
1914 head = &(*head)->next; 2680 head = &(*head)->next;
1915 } 2681 }
1916} 2682}
1917 2683
1918void inline_speed 2684/* internal, faster, version of ev_clear_pending */
2685inline_speed void
1919clear_pending (EV_P_ W w) 2686clear_pending (EV_P_ W w)
1920{ 2687{
1921 if (w->pending) 2688 if (w->pending)
1922 { 2689 {
1923 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2690 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1924 w->pending = 0; 2691 w->pending = 0;
1925 } 2692 }
1926} 2693}
1927 2694
1928int 2695int
… …
1932 int pending = w_->pending; 2699 int pending = w_->pending;
1933 2700
1934 if (expect_true (pending)) 2701 if (expect_true (pending))
1935 { 2702 {
1936 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 2703 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2704 p->w = (W)&pending_w;
1937 w_->pending = 0; 2705 w_->pending = 0;
1938 p->w = 0;
1939 return p->events; 2706 return p->events;
1940 } 2707 }
1941 else 2708 else
1942 return 0; 2709 return 0;
1943} 2710}
1944 2711
1945void inline_size 2712inline_size void
1946pri_adjust (EV_P_ W w) 2713pri_adjust (EV_P_ W w)
1947{ 2714{
1948 int pri = w->priority; 2715 int pri = ev_priority (w);
1949 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 2716 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1950 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 2717 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1951 w->priority = pri; 2718 ev_set_priority (w, pri);
1952} 2719}
1953 2720
1954void inline_speed 2721inline_speed void
1955ev_start (EV_P_ W w, int active) 2722ev_start (EV_P_ W w, int active)
1956{ 2723{
1957 pri_adjust (EV_A_ w); 2724 pri_adjust (EV_A_ w);
1958 w->active = active; 2725 w->active = active;
1959 ev_ref (EV_A); 2726 ev_ref (EV_A);
1960} 2727}
1961 2728
1962void inline_size 2729inline_size void
1963ev_stop (EV_P_ W w) 2730ev_stop (EV_P_ W w)
1964{ 2731{
1965 ev_unref (EV_A); 2732 ev_unref (EV_A);
1966 w->active = 0; 2733 w->active = 0;
1967} 2734}
… …
1974 int fd = w->fd; 2741 int fd = w->fd;
1975 2742
1976 if (expect_false (ev_is_active (w))) 2743 if (expect_false (ev_is_active (w)))
1977 return; 2744 return;
1978 2745
1979 assert (("ev_io_start called with negative fd", fd >= 0)); 2746 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2747 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2748
2749 EV_FREQUENT_CHECK;
1980 2750
1981 ev_start (EV_A_ (W)w, 1); 2751 ev_start (EV_A_ (W)w, 1);
1982 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2752 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1983 wlist_add (&anfds[fd].head, (WL)w); 2753 wlist_add (&anfds[fd].head, (WL)w);
1984 2754
1985 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 2755 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1986 w->events &= ~EV_IOFDSET; 2756 w->events &= ~EV__IOFDSET;
2757
2758 EV_FREQUENT_CHECK;
1987} 2759}
1988 2760
1989void noinline 2761void noinline
1990ev_io_stop (EV_P_ ev_io *w) 2762ev_io_stop (EV_P_ ev_io *w)
1991{ 2763{
1992 clear_pending (EV_A_ (W)w); 2764 clear_pending (EV_A_ (W)w);
1993 if (expect_false (!ev_is_active (w))) 2765 if (expect_false (!ev_is_active (w)))
1994 return; 2766 return;
1995 2767
1996 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2768 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2769
2770 EV_FREQUENT_CHECK;
1997 2771
1998 wlist_del (&anfds[w->fd].head, (WL)w); 2772 wlist_del (&anfds[w->fd].head, (WL)w);
1999 ev_stop (EV_A_ (W)w); 2773 ev_stop (EV_A_ (W)w);
2000 2774
2001 fd_change (EV_A_ w->fd, 1); 2775 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2776
2777 EV_FREQUENT_CHECK;
2002} 2778}
2003 2779
2004void noinline 2780void noinline
2005ev_timer_start (EV_P_ ev_timer *w) 2781ev_timer_start (EV_P_ ev_timer *w)
2006{ 2782{
2007 if (expect_false (ev_is_active (w))) 2783 if (expect_false (ev_is_active (w)))
2008 return; 2784 return;
2009 2785
2010 ev_at (w) += mn_now; 2786 ev_at (w) += mn_now;
2011 2787
2012 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2788 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2013 2789
2790 EV_FREQUENT_CHECK;
2791
2792 ++timercnt;
2014 ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1); 2793 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2015 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 2794 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2016 ANHE_w (timers [ev_active (w)]) = (WT)w; 2795 ANHE_w (timers [ev_active (w)]) = (WT)w;
2017 ANHE_at_set (timers [ev_active (w)]); 2796 ANHE_at_cache (timers [ev_active (w)]);
2018 upheap (timers, ev_active (w)); 2797 upheap (timers, ev_active (w));
2019 2798
2799 EV_FREQUENT_CHECK;
2800
2020 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 2801 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2021} 2802}
2022 2803
2023void noinline 2804void noinline
2024ev_timer_stop (EV_P_ ev_timer *w) 2805ev_timer_stop (EV_P_ ev_timer *w)
2025{ 2806{
2026 clear_pending (EV_A_ (W)w); 2807 clear_pending (EV_A_ (W)w);
2027 if (expect_false (!ev_is_active (w))) 2808 if (expect_false (!ev_is_active (w)))
2028 return; 2809 return;
2029 2810
2811 EV_FREQUENT_CHECK;
2812
2030 { 2813 {
2031 int active = ev_active (w); 2814 int active = ev_active (w);
2032 2815
2033 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); 2816 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2034 2817
2818 --timercnt;
2819
2035 if (expect_true (active < timercnt + HEAP0 - 1)) 2820 if (expect_true (active < timercnt + HEAP0))
2036 { 2821 {
2037 timers [active] = timers [timercnt + HEAP0 - 1]; 2822 timers [active] = timers [timercnt + HEAP0];
2038 adjustheap (timers, timercnt, active); 2823 adjustheap (timers, timercnt, active);
2039 } 2824 }
2040
2041 --timercnt;
2042 } 2825 }
2043 2826
2044 ev_at (w) -= mn_now; 2827 ev_at (w) -= mn_now;
2045 2828
2046 ev_stop (EV_A_ (W)w); 2829 ev_stop (EV_A_ (W)w);
2830
2831 EV_FREQUENT_CHECK;
2047} 2832}
2048 2833
2049void noinline 2834void noinline
2050ev_timer_again (EV_P_ ev_timer *w) 2835ev_timer_again (EV_P_ ev_timer *w)
2051{ 2836{
2837 EV_FREQUENT_CHECK;
2838
2052 if (ev_is_active (w)) 2839 if (ev_is_active (w))
2053 { 2840 {
2054 if (w->repeat) 2841 if (w->repeat)
2055 { 2842 {
2056 ev_at (w) = mn_now + w->repeat; 2843 ev_at (w) = mn_now + w->repeat;
2057 ANHE_at_set (timers [ev_active (w)]); 2844 ANHE_at_cache (timers [ev_active (w)]);
2058 adjustheap (timers, timercnt, ev_active (w)); 2845 adjustheap (timers, timercnt, ev_active (w));
2059 } 2846 }
2060 else 2847 else
2061 ev_timer_stop (EV_A_ w); 2848 ev_timer_stop (EV_A_ w);
2062 } 2849 }
2063 else if (w->repeat) 2850 else if (w->repeat)
2064 { 2851 {
2065 ev_at (w) = w->repeat; 2852 ev_at (w) = w->repeat;
2066 ev_timer_start (EV_A_ w); 2853 ev_timer_start (EV_A_ w);
2067 } 2854 }
2855
2856 EV_FREQUENT_CHECK;
2857}
2858
2859ev_tstamp
2860ev_timer_remaining (EV_P_ ev_timer *w)
2861{
2862 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2068} 2863}
2069 2864
2070#if EV_PERIODIC_ENABLE 2865#if EV_PERIODIC_ENABLE
2071void noinline 2866void noinline
2072ev_periodic_start (EV_P_ ev_periodic *w) 2867ev_periodic_start (EV_P_ ev_periodic *w)
… …
2076 2871
2077 if (w->reschedule_cb) 2872 if (w->reschedule_cb)
2078 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2873 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2079 else if (w->interval) 2874 else if (w->interval)
2080 { 2875 {
2081 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2876 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2082 /* this formula differs from the one in periodic_reify because we do not always round up */ 2877 periodic_recalc (EV_A_ w);
2083 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2084 } 2878 }
2085 else 2879 else
2086 ev_at (w) = w->offset; 2880 ev_at (w) = w->offset;
2087 2881
2882 EV_FREQUENT_CHECK;
2883
2884 ++periodiccnt;
2088 ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1); 2885 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2089 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 2886 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2090 ANHE_w (periodics [ev_active (w)]) = (WT)w; 2887 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2888 ANHE_at_cache (periodics [ev_active (w)]);
2091 upheap (periodics, ev_active (w)); 2889 upheap (periodics, ev_active (w));
2092 2890
2891 EV_FREQUENT_CHECK;
2892
2093 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 2893 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2094} 2894}
2095 2895
2096void noinline 2896void noinline
2097ev_periodic_stop (EV_P_ ev_periodic *w) 2897ev_periodic_stop (EV_P_ ev_periodic *w)
2098{ 2898{
2099 clear_pending (EV_A_ (W)w); 2899 clear_pending (EV_A_ (W)w);
2100 if (expect_false (!ev_is_active (w))) 2900 if (expect_false (!ev_is_active (w)))
2101 return; 2901 return;
2102 2902
2903 EV_FREQUENT_CHECK;
2904
2103 { 2905 {
2104 int active = ev_active (w); 2906 int active = ev_active (w);
2105 2907
2106 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); 2908 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2107 2909
2910 --periodiccnt;
2911
2108 if (expect_true (active < periodiccnt + HEAP0 - 1)) 2912 if (expect_true (active < periodiccnt + HEAP0))
2109 { 2913 {
2110 periodics [active] = periodics [periodiccnt + HEAP0 - 1]; 2914 periodics [active] = periodics [periodiccnt + HEAP0];
2111 adjustheap (periodics, periodiccnt, active); 2915 adjustheap (periodics, periodiccnt, active);
2112 } 2916 }
2113
2114 --periodiccnt;
2115 } 2917 }
2116 2918
2117 ev_stop (EV_A_ (W)w); 2919 ev_stop (EV_A_ (W)w);
2920
2921 EV_FREQUENT_CHECK;
2118} 2922}
2119 2923
2120void noinline 2924void noinline
2121ev_periodic_again (EV_P_ ev_periodic *w) 2925ev_periodic_again (EV_P_ ev_periodic *w)
2122{ 2926{
… …
2128 2932
2129#ifndef SA_RESTART 2933#ifndef SA_RESTART
2130# define SA_RESTART 0 2934# define SA_RESTART 0
2131#endif 2935#endif
2132 2936
2937#if EV_SIGNAL_ENABLE
2938
2133void noinline 2939void noinline
2134ev_signal_start (EV_P_ ev_signal *w) 2940ev_signal_start (EV_P_ ev_signal *w)
2135{ 2941{
2136#if EV_MULTIPLICITY
2137 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2138#endif
2139 if (expect_false (ev_is_active (w))) 2942 if (expect_false (ev_is_active (w)))
2140 return; 2943 return;
2141 2944
2142 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2945 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2143 2946
2144 evpipe_init (EV_A); 2947#if EV_MULTIPLICITY
2948 assert (("libev: a signal must not be attached to two different loops",
2949 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2145 2950
2951 signals [w->signum - 1].loop = EV_A;
2952#endif
2953
2954 EV_FREQUENT_CHECK;
2955
2956#if EV_USE_SIGNALFD
2957 if (sigfd == -2)
2146 { 2958 {
2147#ifndef _WIN32 2959 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2148 sigset_t full, prev; 2960 if (sigfd < 0 && errno == EINVAL)
2149 sigfillset (&full); 2961 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2150 sigprocmask (SIG_SETMASK, &full, &prev);
2151#endif
2152 2962
2153 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 2963 if (sigfd >= 0)
2964 {
2965 fd_intern (sigfd); /* doing it twice will not hurt */
2154 2966
2155#ifndef _WIN32 2967 sigemptyset (&sigfd_set);
2156 sigprocmask (SIG_SETMASK, &prev, 0); 2968
2157#endif 2969 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2970 ev_set_priority (&sigfd_w, EV_MAXPRI);
2971 ev_io_start (EV_A_ &sigfd_w);
2972 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2973 }
2158 } 2974 }
2975
2976 if (sigfd >= 0)
2977 {
2978 /* TODO: check .head */
2979 sigaddset (&sigfd_set, w->signum);
2980 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2981
2982 signalfd (sigfd, &sigfd_set, 0);
2983 }
2984#endif
2159 2985
2160 ev_start (EV_A_ (W)w, 1); 2986 ev_start (EV_A_ (W)w, 1);
2161 wlist_add (&signals [w->signum - 1].head, (WL)w); 2987 wlist_add (&signals [w->signum - 1].head, (WL)w);
2162 2988
2163 if (!((WL)w)->next) 2989 if (!((WL)w)->next)
2990# if EV_USE_SIGNALFD
2991 if (sigfd < 0) /*TODO*/
2992# endif
2164 { 2993 {
2165#if _WIN32 2994# ifdef _WIN32
2995 evpipe_init (EV_A);
2996
2166 signal (w->signum, ev_sighandler); 2997 signal (w->signum, ev_sighandler);
2167#else 2998# else
2168 struct sigaction sa; 2999 struct sigaction sa;
3000
3001 evpipe_init (EV_A);
3002
2169 sa.sa_handler = ev_sighandler; 3003 sa.sa_handler = ev_sighandler;
2170 sigfillset (&sa.sa_mask); 3004 sigfillset (&sa.sa_mask);
2171 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3005 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2172 sigaction (w->signum, &sa, 0); 3006 sigaction (w->signum, &sa, 0);
3007
3008 if (origflags & EVFLAG_NOSIGMASK)
3009 {
3010 sigemptyset (&sa.sa_mask);
3011 sigaddset (&sa.sa_mask, w->signum);
3012 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3013 }
2173#endif 3014#endif
2174 } 3015 }
3016
3017 EV_FREQUENT_CHECK;
2175} 3018}
2176 3019
2177void noinline 3020void noinline
2178ev_signal_stop (EV_P_ ev_signal *w) 3021ev_signal_stop (EV_P_ ev_signal *w)
2179{ 3022{
2180 clear_pending (EV_A_ (W)w); 3023 clear_pending (EV_A_ (W)w);
2181 if (expect_false (!ev_is_active (w))) 3024 if (expect_false (!ev_is_active (w)))
2182 return; 3025 return;
2183 3026
3027 EV_FREQUENT_CHECK;
3028
2184 wlist_del (&signals [w->signum - 1].head, (WL)w); 3029 wlist_del (&signals [w->signum - 1].head, (WL)w);
2185 ev_stop (EV_A_ (W)w); 3030 ev_stop (EV_A_ (W)w);
2186 3031
2187 if (!signals [w->signum - 1].head) 3032 if (!signals [w->signum - 1].head)
3033 {
3034#if EV_MULTIPLICITY
3035 signals [w->signum - 1].loop = 0; /* unattach from signal */
3036#endif
3037#if EV_USE_SIGNALFD
3038 if (sigfd >= 0)
3039 {
3040 sigset_t ss;
3041
3042 sigemptyset (&ss);
3043 sigaddset (&ss, w->signum);
3044 sigdelset (&sigfd_set, w->signum);
3045
3046 signalfd (sigfd, &sigfd_set, 0);
3047 sigprocmask (SIG_UNBLOCK, &ss, 0);
3048 }
3049 else
3050#endif
2188 signal (w->signum, SIG_DFL); 3051 signal (w->signum, SIG_DFL);
3052 }
3053
3054 EV_FREQUENT_CHECK;
2189} 3055}
3056
3057#endif
3058
3059#if EV_CHILD_ENABLE
2190 3060
2191void 3061void
2192ev_child_start (EV_P_ ev_child *w) 3062ev_child_start (EV_P_ ev_child *w)
2193{ 3063{
2194#if EV_MULTIPLICITY 3064#if EV_MULTIPLICITY
2195 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3065 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2196#endif 3066#endif
2197 if (expect_false (ev_is_active (w))) 3067 if (expect_false (ev_is_active (w)))
2198 return; 3068 return;
2199 3069
3070 EV_FREQUENT_CHECK;
3071
2200 ev_start (EV_A_ (W)w, 1); 3072 ev_start (EV_A_ (W)w, 1);
2201 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3073 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3074
3075 EV_FREQUENT_CHECK;
2202} 3076}
2203 3077
2204void 3078void
2205ev_child_stop (EV_P_ ev_child *w) 3079ev_child_stop (EV_P_ ev_child *w)
2206{ 3080{
2207 clear_pending (EV_A_ (W)w); 3081 clear_pending (EV_A_ (W)w);
2208 if (expect_false (!ev_is_active (w))) 3082 if (expect_false (!ev_is_active (w)))
2209 return; 3083 return;
2210 3084
3085 EV_FREQUENT_CHECK;
3086
2211 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3087 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2212 ev_stop (EV_A_ (W)w); 3088 ev_stop (EV_A_ (W)w);
3089
3090 EV_FREQUENT_CHECK;
2213} 3091}
3092
3093#endif
2214 3094
2215#if EV_STAT_ENABLE 3095#if EV_STAT_ENABLE
2216 3096
2217# ifdef _WIN32 3097# ifdef _WIN32
2218# undef lstat 3098# undef lstat
2219# define lstat(a,b) _stati64 (a,b) 3099# define lstat(a,b) _stati64 (a,b)
2220# endif 3100# endif
2221 3101
2222#define DEF_STAT_INTERVAL 5.0074891 3102#define DEF_STAT_INTERVAL 5.0074891
3103#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2223#define MIN_STAT_INTERVAL 0.1074891 3104#define MIN_STAT_INTERVAL 0.1074891
2224 3105
2225static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3106static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2226 3107
2227#if EV_USE_INOTIFY 3108#if EV_USE_INOTIFY
2228# define EV_INOTIFY_BUFSIZE 8192 3109
3110/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3111# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2229 3112
2230static void noinline 3113static void noinline
2231infy_add (EV_P_ ev_stat *w) 3114infy_add (EV_P_ ev_stat *w)
2232{ 3115{
2233 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); 3116 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);
2234 3117
2235 if (w->wd < 0) 3118 if (w->wd >= 0)
3119 {
3120 struct statfs sfs;
3121
3122 /* now local changes will be tracked by inotify, but remote changes won't */
3123 /* unless the filesystem is known to be local, we therefore still poll */
3124 /* also do poll on <2.6.25, but with normal frequency */
3125
3126 if (!fs_2625)
3127 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3128 else if (!statfs (w->path, &sfs)
3129 && (sfs.f_type == 0x1373 /* devfs */
3130 || sfs.f_type == 0xEF53 /* ext2/3 */
3131 || sfs.f_type == 0x3153464a /* jfs */
3132 || sfs.f_type == 0x52654973 /* reiser3 */
3133 || sfs.f_type == 0x01021994 /* tempfs */
3134 || sfs.f_type == 0x58465342 /* xfs */))
3135 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3136 else
3137 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2236 { 3138 }
2237 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3139 else
3140 {
3141 /* can't use inotify, continue to stat */
3142 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2238 3143
2239 /* monitor some parent directory for speedup hints */ 3144 /* if path is not there, monitor some parent directory for speedup hints */
2240 /* note that exceeding the hardcoded limit is not a correctness issue, */ 3145 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2241 /* but an efficiency issue only */ 3146 /* but an efficiency issue only */
2242 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3147 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2243 { 3148 {
2244 char path [4096]; 3149 char path [4096];
2245 strcpy (path, w->path); 3150 strcpy (path, w->path);
… …
2249 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3154 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2250 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3155 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2251 3156
2252 char *pend = strrchr (path, '/'); 3157 char *pend = strrchr (path, '/');
2253 3158
2254 if (!pend) 3159 if (!pend || pend == path)
2255 break; /* whoops, no '/', complain to your admin */ 3160 break;
2256 3161
2257 *pend = 0; 3162 *pend = 0;
2258 w->wd = inotify_add_watch (fs_fd, path, mask); 3163 w->wd = inotify_add_watch (fs_fd, path, mask);
2259 } 3164 }
2260 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3165 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2261 } 3166 }
2262 } 3167 }
2263 else
2264 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2265 3168
2266 if (w->wd >= 0) 3169 if (w->wd >= 0)
2267 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3170 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3171
3172 /* now re-arm timer, if required */
3173 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3174 ev_timer_again (EV_A_ &w->timer);
3175 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2268} 3176}
2269 3177
2270static void noinline 3178static void noinline
2271infy_del (EV_P_ ev_stat *w) 3179infy_del (EV_P_ ev_stat *w)
2272{ 3180{
… …
2275 3183
2276 if (wd < 0) 3184 if (wd < 0)
2277 return; 3185 return;
2278 3186
2279 w->wd = -2; 3187 w->wd = -2;
2280 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3188 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2281 wlist_del (&fs_hash [slot].head, (WL)w); 3189 wlist_del (&fs_hash [slot].head, (WL)w);
2282 3190
2283 /* remove this watcher, if others are watching it, they will rearm */ 3191 /* remove this watcher, if others are watching it, they will rearm */
2284 inotify_rm_watch (fs_fd, wd); 3192 inotify_rm_watch (fs_fd, wd);
2285} 3193}
2286 3194
2287static void noinline 3195static void noinline
2288infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3196infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2289{ 3197{
2290 if (slot < 0) 3198 if (slot < 0)
2291 /* overflow, need to check for all hahs slots */ 3199 /* overflow, need to check for all hash slots */
2292 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3200 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2293 infy_wd (EV_A_ slot, wd, ev); 3201 infy_wd (EV_A_ slot, wd, ev);
2294 else 3202 else
2295 { 3203 {
2296 WL w_; 3204 WL w_;
2297 3205
2298 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3206 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2299 { 3207 {
2300 ev_stat *w = (ev_stat *)w_; 3208 ev_stat *w = (ev_stat *)w_;
2301 w_ = w_->next; /* lets us remove this watcher and all before it */ 3209 w_ = w_->next; /* lets us remove this watcher and all before it */
2302 3210
2303 if (w->wd == wd || wd == -1) 3211 if (w->wd == wd || wd == -1)
2304 { 3212 {
2305 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3213 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2306 { 3214 {
3215 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2307 w->wd = -1; 3216 w->wd = -1;
2308 infy_add (EV_A_ w); /* re-add, no matter what */ 3217 infy_add (EV_A_ w); /* re-add, no matter what */
2309 } 3218 }
2310 3219
2311 stat_timer_cb (EV_A_ &w->timer, 0); 3220 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2316 3225
2317static void 3226static void
2318infy_cb (EV_P_ ev_io *w, int revents) 3227infy_cb (EV_P_ ev_io *w, int revents)
2319{ 3228{
2320 char buf [EV_INOTIFY_BUFSIZE]; 3229 char buf [EV_INOTIFY_BUFSIZE];
2321 struct inotify_event *ev = (struct inotify_event *)buf;
2322 int ofs; 3230 int ofs;
2323 int len = read (fs_fd, buf, sizeof (buf)); 3231 int len = read (fs_fd, buf, sizeof (buf));
2324 3232
2325 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3233 for (ofs = 0; ofs < len; )
3234 {
3235 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2326 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3236 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3237 ofs += sizeof (struct inotify_event) + ev->len;
3238 }
2327} 3239}
2328 3240
2329void inline_size 3241inline_size void
3242ev_check_2625 (EV_P)
3243{
3244 /* kernels < 2.6.25 are borked
3245 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3246 */
3247 if (ev_linux_version () < 0x020619)
3248 return;
3249
3250 fs_2625 = 1;
3251}
3252
3253inline_size int
3254infy_newfd (void)
3255{
3256#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3257 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3258 if (fd >= 0)
3259 return fd;
3260#endif
3261 return inotify_init ();
3262}
3263
3264inline_size void
2330infy_init (EV_P) 3265infy_init (EV_P)
2331{ 3266{
2332 if (fs_fd != -2) 3267 if (fs_fd != -2)
2333 return; 3268 return;
2334 3269
3270 fs_fd = -1;
3271
3272 ev_check_2625 (EV_A);
3273
2335 fs_fd = inotify_init (); 3274 fs_fd = infy_newfd ();
2336 3275
2337 if (fs_fd >= 0) 3276 if (fs_fd >= 0)
2338 { 3277 {
3278 fd_intern (fs_fd);
2339 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3279 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2340 ev_set_priority (&fs_w, EV_MAXPRI); 3280 ev_set_priority (&fs_w, EV_MAXPRI);
2341 ev_io_start (EV_A_ &fs_w); 3281 ev_io_start (EV_A_ &fs_w);
3282 ev_unref (EV_A);
2342 } 3283 }
2343} 3284}
2344 3285
2345void inline_size 3286inline_size void
2346infy_fork (EV_P) 3287infy_fork (EV_P)
2347{ 3288{
2348 int slot; 3289 int slot;
2349 3290
2350 if (fs_fd < 0) 3291 if (fs_fd < 0)
2351 return; 3292 return;
2352 3293
3294 ev_ref (EV_A);
3295 ev_io_stop (EV_A_ &fs_w);
2353 close (fs_fd); 3296 close (fs_fd);
2354 fs_fd = inotify_init (); 3297 fs_fd = infy_newfd ();
2355 3298
3299 if (fs_fd >= 0)
3300 {
3301 fd_intern (fs_fd);
3302 ev_io_set (&fs_w, fs_fd, EV_READ);
3303 ev_io_start (EV_A_ &fs_w);
3304 ev_unref (EV_A);
3305 }
3306
2356 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3307 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2357 { 3308 {
2358 WL w_ = fs_hash [slot].head; 3309 WL w_ = fs_hash [slot].head;
2359 fs_hash [slot].head = 0; 3310 fs_hash [slot].head = 0;
2360 3311
2361 while (w_) 3312 while (w_)
… …
2366 w->wd = -1; 3317 w->wd = -1;
2367 3318
2368 if (fs_fd >= 0) 3319 if (fs_fd >= 0)
2369 infy_add (EV_A_ w); /* re-add, no matter what */ 3320 infy_add (EV_A_ w); /* re-add, no matter what */
2370 else 3321 else
3322 {
3323 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3324 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2371 ev_timer_start (EV_A_ &w->timer); 3325 ev_timer_again (EV_A_ &w->timer);
3326 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3327 }
2372 } 3328 }
2373
2374 } 3329 }
2375} 3330}
2376 3331
3332#endif
3333
3334#ifdef _WIN32
3335# define EV_LSTAT(p,b) _stati64 (p, b)
3336#else
3337# define EV_LSTAT(p,b) lstat (p, b)
2377#endif 3338#endif
2378 3339
2379void 3340void
2380ev_stat_stat (EV_P_ ev_stat *w) 3341ev_stat_stat (EV_P_ ev_stat *w)
2381{ 3342{
… …
2388static void noinline 3349static void noinline
2389stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3350stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2390{ 3351{
2391 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3352 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2392 3353
2393 /* we copy this here each the time so that */ 3354 ev_statdata prev = w->attr;
2394 /* prev has the old value when the callback gets invoked */
2395 w->prev = w->attr;
2396 ev_stat_stat (EV_A_ w); 3355 ev_stat_stat (EV_A_ w);
2397 3356
2398 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3357 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2399 if ( 3358 if (
2400 w->prev.st_dev != w->attr.st_dev 3359 prev.st_dev != w->attr.st_dev
2401 || w->prev.st_ino != w->attr.st_ino 3360 || prev.st_ino != w->attr.st_ino
2402 || w->prev.st_mode != w->attr.st_mode 3361 || prev.st_mode != w->attr.st_mode
2403 || w->prev.st_nlink != w->attr.st_nlink 3362 || prev.st_nlink != w->attr.st_nlink
2404 || w->prev.st_uid != w->attr.st_uid 3363 || prev.st_uid != w->attr.st_uid
2405 || w->prev.st_gid != w->attr.st_gid 3364 || prev.st_gid != w->attr.st_gid
2406 || w->prev.st_rdev != w->attr.st_rdev 3365 || prev.st_rdev != w->attr.st_rdev
2407 || w->prev.st_size != w->attr.st_size 3366 || prev.st_size != w->attr.st_size
2408 || w->prev.st_atime != w->attr.st_atime 3367 || prev.st_atime != w->attr.st_atime
2409 || w->prev.st_mtime != w->attr.st_mtime 3368 || prev.st_mtime != w->attr.st_mtime
2410 || w->prev.st_ctime != w->attr.st_ctime 3369 || prev.st_ctime != w->attr.st_ctime
2411 ) { 3370 ) {
3371 /* we only update w->prev on actual differences */
3372 /* in case we test more often than invoke the callback, */
3373 /* to ensure that prev is always different to attr */
3374 w->prev = prev;
3375
2412 #if EV_USE_INOTIFY 3376 #if EV_USE_INOTIFY
3377 if (fs_fd >= 0)
3378 {
2413 infy_del (EV_A_ w); 3379 infy_del (EV_A_ w);
2414 infy_add (EV_A_ w); 3380 infy_add (EV_A_ w);
2415 ev_stat_stat (EV_A_ w); /* avoid race... */ 3381 ev_stat_stat (EV_A_ w); /* avoid race... */
3382 }
2416 #endif 3383 #endif
2417 3384
2418 ev_feed_event (EV_A_ w, EV_STAT); 3385 ev_feed_event (EV_A_ w, EV_STAT);
2419 } 3386 }
2420} 3387}
… …
2423ev_stat_start (EV_P_ ev_stat *w) 3390ev_stat_start (EV_P_ ev_stat *w)
2424{ 3391{
2425 if (expect_false (ev_is_active (w))) 3392 if (expect_false (ev_is_active (w)))
2426 return; 3393 return;
2427 3394
2428 /* since we use memcmp, we need to clear any padding data etc. */
2429 memset (&w->prev, 0, sizeof (ev_statdata));
2430 memset (&w->attr, 0, sizeof (ev_statdata));
2431
2432 ev_stat_stat (EV_A_ w); 3395 ev_stat_stat (EV_A_ w);
2433 3396
3397 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2434 if (w->interval < MIN_STAT_INTERVAL) 3398 w->interval = MIN_STAT_INTERVAL;
2435 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2436 3399
2437 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3400 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2438 ev_set_priority (&w->timer, ev_priority (w)); 3401 ev_set_priority (&w->timer, ev_priority (w));
2439 3402
2440#if EV_USE_INOTIFY 3403#if EV_USE_INOTIFY
2441 infy_init (EV_A); 3404 infy_init (EV_A);
2442 3405
2443 if (fs_fd >= 0) 3406 if (fs_fd >= 0)
2444 infy_add (EV_A_ w); 3407 infy_add (EV_A_ w);
2445 else 3408 else
2446#endif 3409#endif
3410 {
2447 ev_timer_start (EV_A_ &w->timer); 3411 ev_timer_again (EV_A_ &w->timer);
3412 ev_unref (EV_A);
3413 }
2448 3414
2449 ev_start (EV_A_ (W)w, 1); 3415 ev_start (EV_A_ (W)w, 1);
3416
3417 EV_FREQUENT_CHECK;
2450} 3418}
2451 3419
2452void 3420void
2453ev_stat_stop (EV_P_ ev_stat *w) 3421ev_stat_stop (EV_P_ ev_stat *w)
2454{ 3422{
2455 clear_pending (EV_A_ (W)w); 3423 clear_pending (EV_A_ (W)w);
2456 if (expect_false (!ev_is_active (w))) 3424 if (expect_false (!ev_is_active (w)))
2457 return; 3425 return;
2458 3426
3427 EV_FREQUENT_CHECK;
3428
2459#if EV_USE_INOTIFY 3429#if EV_USE_INOTIFY
2460 infy_del (EV_A_ w); 3430 infy_del (EV_A_ w);
2461#endif 3431#endif
3432
3433 if (ev_is_active (&w->timer))
3434 {
3435 ev_ref (EV_A);
2462 ev_timer_stop (EV_A_ &w->timer); 3436 ev_timer_stop (EV_A_ &w->timer);
3437 }
2463 3438
2464 ev_stop (EV_A_ (W)w); 3439 ev_stop (EV_A_ (W)w);
3440
3441 EV_FREQUENT_CHECK;
2465} 3442}
2466#endif 3443#endif
2467 3444
2468#if EV_IDLE_ENABLE 3445#if EV_IDLE_ENABLE
2469void 3446void
… …
2471{ 3448{
2472 if (expect_false (ev_is_active (w))) 3449 if (expect_false (ev_is_active (w)))
2473 return; 3450 return;
2474 3451
2475 pri_adjust (EV_A_ (W)w); 3452 pri_adjust (EV_A_ (W)w);
3453
3454 EV_FREQUENT_CHECK;
2476 3455
2477 { 3456 {
2478 int active = ++idlecnt [ABSPRI (w)]; 3457 int active = ++idlecnt [ABSPRI (w)];
2479 3458
2480 ++idleall; 3459 ++idleall;
2481 ev_start (EV_A_ (W)w, active); 3460 ev_start (EV_A_ (W)w, active);
2482 3461
2483 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 3462 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2484 idles [ABSPRI (w)][active - 1] = w; 3463 idles [ABSPRI (w)][active - 1] = w;
2485 } 3464 }
3465
3466 EV_FREQUENT_CHECK;
2486} 3467}
2487 3468
2488void 3469void
2489ev_idle_stop (EV_P_ ev_idle *w) 3470ev_idle_stop (EV_P_ ev_idle *w)
2490{ 3471{
2491 clear_pending (EV_A_ (W)w); 3472 clear_pending (EV_A_ (W)w);
2492 if (expect_false (!ev_is_active (w))) 3473 if (expect_false (!ev_is_active (w)))
2493 return; 3474 return;
2494 3475
3476 EV_FREQUENT_CHECK;
3477
2495 { 3478 {
2496 int active = ev_active (w); 3479 int active = ev_active (w);
2497 3480
2498 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 3481 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2499 ev_active (idles [ABSPRI (w)][active - 1]) = active; 3482 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2500 3483
2501 ev_stop (EV_A_ (W)w); 3484 ev_stop (EV_A_ (W)w);
2502 --idleall; 3485 --idleall;
2503 } 3486 }
2504}
2505#endif
2506 3487
3488 EV_FREQUENT_CHECK;
3489}
3490#endif
3491
3492#if EV_PREPARE_ENABLE
2507void 3493void
2508ev_prepare_start (EV_P_ ev_prepare *w) 3494ev_prepare_start (EV_P_ ev_prepare *w)
2509{ 3495{
2510 if (expect_false (ev_is_active (w))) 3496 if (expect_false (ev_is_active (w)))
2511 return; 3497 return;
3498
3499 EV_FREQUENT_CHECK;
2512 3500
2513 ev_start (EV_A_ (W)w, ++preparecnt); 3501 ev_start (EV_A_ (W)w, ++preparecnt);
2514 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 3502 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2515 prepares [preparecnt - 1] = w; 3503 prepares [preparecnt - 1] = w;
3504
3505 EV_FREQUENT_CHECK;
2516} 3506}
2517 3507
2518void 3508void
2519ev_prepare_stop (EV_P_ ev_prepare *w) 3509ev_prepare_stop (EV_P_ ev_prepare *w)
2520{ 3510{
2521 clear_pending (EV_A_ (W)w); 3511 clear_pending (EV_A_ (W)w);
2522 if (expect_false (!ev_is_active (w))) 3512 if (expect_false (!ev_is_active (w)))
2523 return; 3513 return;
2524 3514
3515 EV_FREQUENT_CHECK;
3516
2525 { 3517 {
2526 int active = ev_active (w); 3518 int active = ev_active (w);
2527 3519
2528 prepares [active - 1] = prepares [--preparecnt]; 3520 prepares [active - 1] = prepares [--preparecnt];
2529 ev_active (prepares [active - 1]) = active; 3521 ev_active (prepares [active - 1]) = active;
2530 } 3522 }
2531 3523
2532 ev_stop (EV_A_ (W)w); 3524 ev_stop (EV_A_ (W)w);
2533}
2534 3525
3526 EV_FREQUENT_CHECK;
3527}
3528#endif
3529
3530#if EV_CHECK_ENABLE
2535void 3531void
2536ev_check_start (EV_P_ ev_check *w) 3532ev_check_start (EV_P_ ev_check *w)
2537{ 3533{
2538 if (expect_false (ev_is_active (w))) 3534 if (expect_false (ev_is_active (w)))
2539 return; 3535 return;
3536
3537 EV_FREQUENT_CHECK;
2540 3538
2541 ev_start (EV_A_ (W)w, ++checkcnt); 3539 ev_start (EV_A_ (W)w, ++checkcnt);
2542 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 3540 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2543 checks [checkcnt - 1] = w; 3541 checks [checkcnt - 1] = w;
3542
3543 EV_FREQUENT_CHECK;
2544} 3544}
2545 3545
2546void 3546void
2547ev_check_stop (EV_P_ ev_check *w) 3547ev_check_stop (EV_P_ ev_check *w)
2548{ 3548{
2549 clear_pending (EV_A_ (W)w); 3549 clear_pending (EV_A_ (W)w);
2550 if (expect_false (!ev_is_active (w))) 3550 if (expect_false (!ev_is_active (w)))
2551 return; 3551 return;
2552 3552
3553 EV_FREQUENT_CHECK;
3554
2553 { 3555 {
2554 int active = ev_active (w); 3556 int active = ev_active (w);
2555 3557
2556 checks [active - 1] = checks [--checkcnt]; 3558 checks [active - 1] = checks [--checkcnt];
2557 ev_active (checks [active - 1]) = active; 3559 ev_active (checks [active - 1]) = active;
2558 } 3560 }
2559 3561
2560 ev_stop (EV_A_ (W)w); 3562 ev_stop (EV_A_ (W)w);
3563
3564 EV_FREQUENT_CHECK;
2561} 3565}
3566#endif
2562 3567
2563#if EV_EMBED_ENABLE 3568#if EV_EMBED_ENABLE
2564void noinline 3569void noinline
2565ev_embed_sweep (EV_P_ ev_embed *w) 3570ev_embed_sweep (EV_P_ ev_embed *w)
2566{ 3571{
2567 ev_loop (w->other, EVLOOP_NONBLOCK); 3572 ev_run (w->other, EVRUN_NOWAIT);
2568} 3573}
2569 3574
2570static void 3575static void
2571embed_io_cb (EV_P_ ev_io *io, int revents) 3576embed_io_cb (EV_P_ ev_io *io, int revents)
2572{ 3577{
2573 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3578 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2574 3579
2575 if (ev_cb (w)) 3580 if (ev_cb (w))
2576 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3581 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2577 else 3582 else
2578 ev_loop (w->other, EVLOOP_NONBLOCK); 3583 ev_run (w->other, EVRUN_NOWAIT);
2579} 3584}
2580 3585
2581static void 3586static void
2582embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 3587embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2583{ 3588{
2584 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 3589 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2585 3590
2586 { 3591 {
2587 struct ev_loop *loop = w->other; 3592 EV_P = w->other;
2588 3593
2589 while (fdchangecnt) 3594 while (fdchangecnt)
2590 { 3595 {
2591 fd_reify (EV_A); 3596 fd_reify (EV_A);
2592 ev_loop (EV_A_ EVLOOP_NONBLOCK); 3597 ev_run (EV_A_ EVRUN_NOWAIT);
2593 } 3598 }
2594 } 3599 }
3600}
3601
3602static void
3603embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3604{
3605 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3606
3607 ev_embed_stop (EV_A_ w);
3608
3609 {
3610 EV_P = w->other;
3611
3612 ev_loop_fork (EV_A);
3613 ev_run (EV_A_ EVRUN_NOWAIT);
3614 }
3615
3616 ev_embed_start (EV_A_ w);
2595} 3617}
2596 3618
2597#if 0 3619#if 0
2598static void 3620static void
2599embed_idle_cb (EV_P_ ev_idle *idle, int revents) 3621embed_idle_cb (EV_P_ ev_idle *idle, int revents)
… …
2607{ 3629{
2608 if (expect_false (ev_is_active (w))) 3630 if (expect_false (ev_is_active (w)))
2609 return; 3631 return;
2610 3632
2611 { 3633 {
2612 struct ev_loop *loop = w->other; 3634 EV_P = w->other;
2613 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 3635 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2614 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 3636 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2615 } 3637 }
3638
3639 EV_FREQUENT_CHECK;
2616 3640
2617 ev_set_priority (&w->io, ev_priority (w)); 3641 ev_set_priority (&w->io, ev_priority (w));
2618 ev_io_start (EV_A_ &w->io); 3642 ev_io_start (EV_A_ &w->io);
2619 3643
2620 ev_prepare_init (&w->prepare, embed_prepare_cb); 3644 ev_prepare_init (&w->prepare, embed_prepare_cb);
2621 ev_set_priority (&w->prepare, EV_MINPRI); 3645 ev_set_priority (&w->prepare, EV_MINPRI);
2622 ev_prepare_start (EV_A_ &w->prepare); 3646 ev_prepare_start (EV_A_ &w->prepare);
2623 3647
3648 ev_fork_init (&w->fork, embed_fork_cb);
3649 ev_fork_start (EV_A_ &w->fork);
3650
2624 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 3651 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2625 3652
2626 ev_start (EV_A_ (W)w, 1); 3653 ev_start (EV_A_ (W)w, 1);
3654
3655 EV_FREQUENT_CHECK;
2627} 3656}
2628 3657
2629void 3658void
2630ev_embed_stop (EV_P_ ev_embed *w) 3659ev_embed_stop (EV_P_ ev_embed *w)
2631{ 3660{
2632 clear_pending (EV_A_ (W)w); 3661 clear_pending (EV_A_ (W)w);
2633 if (expect_false (!ev_is_active (w))) 3662 if (expect_false (!ev_is_active (w)))
2634 return; 3663 return;
2635 3664
3665 EV_FREQUENT_CHECK;
3666
2636 ev_io_stop (EV_A_ &w->io); 3667 ev_io_stop (EV_A_ &w->io);
2637 ev_prepare_stop (EV_A_ &w->prepare); 3668 ev_prepare_stop (EV_A_ &w->prepare);
3669 ev_fork_stop (EV_A_ &w->fork);
2638 3670
2639 ev_stop (EV_A_ (W)w); 3671 ev_stop (EV_A_ (W)w);
3672
3673 EV_FREQUENT_CHECK;
2640} 3674}
2641#endif 3675#endif
2642 3676
2643#if EV_FORK_ENABLE 3677#if EV_FORK_ENABLE
2644void 3678void
2645ev_fork_start (EV_P_ ev_fork *w) 3679ev_fork_start (EV_P_ ev_fork *w)
2646{ 3680{
2647 if (expect_false (ev_is_active (w))) 3681 if (expect_false (ev_is_active (w)))
2648 return; 3682 return;
3683
3684 EV_FREQUENT_CHECK;
2649 3685
2650 ev_start (EV_A_ (W)w, ++forkcnt); 3686 ev_start (EV_A_ (W)w, ++forkcnt);
2651 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 3687 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2652 forks [forkcnt - 1] = w; 3688 forks [forkcnt - 1] = w;
3689
3690 EV_FREQUENT_CHECK;
2653} 3691}
2654 3692
2655void 3693void
2656ev_fork_stop (EV_P_ ev_fork *w) 3694ev_fork_stop (EV_P_ ev_fork *w)
2657{ 3695{
2658 clear_pending (EV_A_ (W)w); 3696 clear_pending (EV_A_ (W)w);
2659 if (expect_false (!ev_is_active (w))) 3697 if (expect_false (!ev_is_active (w)))
2660 return; 3698 return;
2661 3699
3700 EV_FREQUENT_CHECK;
3701
2662 { 3702 {
2663 int active = ev_active (w); 3703 int active = ev_active (w);
2664 3704
2665 forks [active - 1] = forks [--forkcnt]; 3705 forks [active - 1] = forks [--forkcnt];
2666 ev_active (forks [active - 1]) = active; 3706 ev_active (forks [active - 1]) = active;
2667 } 3707 }
2668 3708
2669 ev_stop (EV_A_ (W)w); 3709 ev_stop (EV_A_ (W)w);
2670}
2671#endif
2672 3710
3711 EV_FREQUENT_CHECK;
3712}
3713#endif
3714
2673#if EV_ASYNC_ENABLE 3715#if EV_CLEANUP_ENABLE
2674void 3716void
2675ev_async_start (EV_P_ ev_async *w) 3717ev_cleanup_start (EV_P_ ev_cleanup *w)
2676{ 3718{
2677 if (expect_false (ev_is_active (w))) 3719 if (expect_false (ev_is_active (w)))
2678 return; 3720 return;
2679 3721
3722 EV_FREQUENT_CHECK;
3723
3724 ev_start (EV_A_ (W)w, ++cleanupcnt);
3725 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3726 cleanups [cleanupcnt - 1] = w;
3727
3728 /* cleanup watchers should never keep a refcount on the loop */
3729 ev_unref (EV_A);
3730 EV_FREQUENT_CHECK;
3731}
3732
3733void
3734ev_cleanup_stop (EV_P_ ev_cleanup *w)
3735{
3736 clear_pending (EV_A_ (W)w);
3737 if (expect_false (!ev_is_active (w)))
3738 return;
3739
3740 EV_FREQUENT_CHECK;
3741 ev_ref (EV_A);
3742
3743 {
3744 int active = ev_active (w);
3745
3746 cleanups [active - 1] = cleanups [--cleanupcnt];
3747 ev_active (cleanups [active - 1]) = active;
3748 }
3749
3750 ev_stop (EV_A_ (W)w);
3751
3752 EV_FREQUENT_CHECK;
3753}
3754#endif
3755
3756#if EV_ASYNC_ENABLE
3757void
3758ev_async_start (EV_P_ ev_async *w)
3759{
3760 if (expect_false (ev_is_active (w)))
3761 return;
3762
3763 w->sent = 0;
3764
2680 evpipe_init (EV_A); 3765 evpipe_init (EV_A);
3766
3767 EV_FREQUENT_CHECK;
2681 3768
2682 ev_start (EV_A_ (W)w, ++asynccnt); 3769 ev_start (EV_A_ (W)w, ++asynccnt);
2683 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 3770 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2684 asyncs [asynccnt - 1] = w; 3771 asyncs [asynccnt - 1] = w;
3772
3773 EV_FREQUENT_CHECK;
2685} 3774}
2686 3775
2687void 3776void
2688ev_async_stop (EV_P_ ev_async *w) 3777ev_async_stop (EV_P_ ev_async *w)
2689{ 3778{
2690 clear_pending (EV_A_ (W)w); 3779 clear_pending (EV_A_ (W)w);
2691 if (expect_false (!ev_is_active (w))) 3780 if (expect_false (!ev_is_active (w)))
2692 return; 3781 return;
2693 3782
3783 EV_FREQUENT_CHECK;
3784
2694 { 3785 {
2695 int active = ev_active (w); 3786 int active = ev_active (w);
2696 3787
2697 asyncs [active - 1] = asyncs [--asynccnt]; 3788 asyncs [active - 1] = asyncs [--asynccnt];
2698 ev_active (asyncs [active - 1]) = active; 3789 ev_active (asyncs [active - 1]) = active;
2699 } 3790 }
2700 3791
2701 ev_stop (EV_A_ (W)w); 3792 ev_stop (EV_A_ (W)w);
3793
3794 EV_FREQUENT_CHECK;
2702} 3795}
2703 3796
2704void 3797void
2705ev_async_send (EV_P_ ev_async *w) 3798ev_async_send (EV_P_ ev_async *w)
2706{ 3799{
2707 w->sent = 1; 3800 w->sent = 1;
2708 evpipe_write (EV_A_ &gotasync); 3801 evpipe_write (EV_A_ &async_pending);
2709} 3802}
2710#endif 3803#endif
2711 3804
2712/*****************************************************************************/ 3805/*****************************************************************************/
2713 3806
… …
2723once_cb (EV_P_ struct ev_once *once, int revents) 3816once_cb (EV_P_ struct ev_once *once, int revents)
2724{ 3817{
2725 void (*cb)(int revents, void *arg) = once->cb; 3818 void (*cb)(int revents, void *arg) = once->cb;
2726 void *arg = once->arg; 3819 void *arg = once->arg;
2727 3820
2728 ev_io_stop (EV_A_ &once->io); 3821 ev_io_stop (EV_A_ &once->io);
2729 ev_timer_stop (EV_A_ &once->to); 3822 ev_timer_stop (EV_A_ &once->to);
2730 ev_free (once); 3823 ev_free (once);
2731 3824
2732 cb (revents, arg); 3825 cb (revents, arg);
2733} 3826}
2734 3827
2735static void 3828static void
2736once_cb_io (EV_P_ ev_io *w, int revents) 3829once_cb_io (EV_P_ ev_io *w, int revents)
2737{ 3830{
2738 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3831 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3832
3833 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2739} 3834}
2740 3835
2741static void 3836static void
2742once_cb_to (EV_P_ ev_timer *w, int revents) 3837once_cb_to (EV_P_ ev_timer *w, int revents)
2743{ 3838{
2744 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3839 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3840
3841 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2745} 3842}
2746 3843
2747void 3844void
2748ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3845ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2749{ 3846{
2750 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3847 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2751 3848
2752 if (expect_false (!once)) 3849 if (expect_false (!once))
2753 { 3850 {
2754 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3851 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2755 return; 3852 return;
2756 } 3853 }
2757 3854
2758 once->cb = cb; 3855 once->cb = cb;
2759 once->arg = arg; 3856 once->arg = arg;
… …
2771 ev_timer_set (&once->to, timeout, 0.); 3868 ev_timer_set (&once->to, timeout, 0.);
2772 ev_timer_start (EV_A_ &once->to); 3869 ev_timer_start (EV_A_ &once->to);
2773 } 3870 }
2774} 3871}
2775 3872
3873/*****************************************************************************/
3874
3875#if EV_WALK_ENABLE
3876void
3877ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3878{
3879 int i, j;
3880 ev_watcher_list *wl, *wn;
3881
3882 if (types & (EV_IO | EV_EMBED))
3883 for (i = 0; i < anfdmax; ++i)
3884 for (wl = anfds [i].head; wl; )
3885 {
3886 wn = wl->next;
3887
3888#if EV_EMBED_ENABLE
3889 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3890 {
3891 if (types & EV_EMBED)
3892 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3893 }
3894 else
3895#endif
3896#if EV_USE_INOTIFY
3897 if (ev_cb ((ev_io *)wl) == infy_cb)
3898 ;
3899 else
3900#endif
3901 if ((ev_io *)wl != &pipe_w)
3902 if (types & EV_IO)
3903 cb (EV_A_ EV_IO, wl);
3904
3905 wl = wn;
3906 }
3907
3908 if (types & (EV_TIMER | EV_STAT))
3909 for (i = timercnt + HEAP0; i-- > HEAP0; )
3910#if EV_STAT_ENABLE
3911 /*TODO: timer is not always active*/
3912 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3913 {
3914 if (types & EV_STAT)
3915 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3916 }
3917 else
3918#endif
3919 if (types & EV_TIMER)
3920 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3921
3922#if EV_PERIODIC_ENABLE
3923 if (types & EV_PERIODIC)
3924 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3925 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3926#endif
3927
3928#if EV_IDLE_ENABLE
3929 if (types & EV_IDLE)
3930 for (j = NUMPRI; i--; )
3931 for (i = idlecnt [j]; i--; )
3932 cb (EV_A_ EV_IDLE, idles [j][i]);
3933#endif
3934
3935#if EV_FORK_ENABLE
3936 if (types & EV_FORK)
3937 for (i = forkcnt; i--; )
3938 if (ev_cb (forks [i]) != embed_fork_cb)
3939 cb (EV_A_ EV_FORK, forks [i]);
3940#endif
3941
3942#if EV_ASYNC_ENABLE
3943 if (types & EV_ASYNC)
3944 for (i = asynccnt; i--; )
3945 cb (EV_A_ EV_ASYNC, asyncs [i]);
3946#endif
3947
3948#if EV_PREPARE_ENABLE
3949 if (types & EV_PREPARE)
3950 for (i = preparecnt; i--; )
3951# if EV_EMBED_ENABLE
3952 if (ev_cb (prepares [i]) != embed_prepare_cb)
3953# endif
3954 cb (EV_A_ EV_PREPARE, prepares [i]);
3955#endif
3956
3957#if EV_CHECK_ENABLE
3958 if (types & EV_CHECK)
3959 for (i = checkcnt; i--; )
3960 cb (EV_A_ EV_CHECK, checks [i]);
3961#endif
3962
3963#if EV_SIGNAL_ENABLE
3964 if (types & EV_SIGNAL)
3965 for (i = 0; i < EV_NSIG - 1; ++i)
3966 for (wl = signals [i].head; wl; )
3967 {
3968 wn = wl->next;
3969 cb (EV_A_ EV_SIGNAL, wl);
3970 wl = wn;
3971 }
3972#endif
3973
3974#if EV_CHILD_ENABLE
3975 if (types & EV_CHILD)
3976 for (i = (EV_PID_HASHSIZE); i--; )
3977 for (wl = childs [i]; wl; )
3978 {
3979 wn = wl->next;
3980 cb (EV_A_ EV_CHILD, wl);
3981 wl = wn;
3982 }
3983#endif
3984/* EV_STAT 0x00001000 /* stat data changed */
3985/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3986}
3987#endif
3988
2776#if EV_MULTIPLICITY 3989#if EV_MULTIPLICITY
2777 #include "ev_wrap.h" 3990 #include "ev_wrap.h"
2778#endif 3991#endif
2779 3992
2780#ifdef __cplusplus 3993EV_CPP(})
2781}
2782#endif
2783 3994

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