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Comparing libev/ev.c (file contents):
Revision 1.273 by root, Mon Nov 3 14:27:06 2008 UTC vs.
Revision 1.389 by root, Wed Aug 3 15:31:23 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
154# endif
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
130# endif 163# endif
131 164
132#endif 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>
… …
160# define WIN32_LEAN_AND_MEAN 196# define WIN32_LEAN_AND_MEAN
161# include <windows.h> 197# include <windows.h>
162# ifndef EV_SELECT_IS_WINSOCKET 198# ifndef EV_SELECT_IS_WINSOCKET
163# define EV_SELECT_IS_WINSOCKET 1 199# define EV_SELECT_IS_WINSOCKET 1
164# endif 200# endif
201# undef EV_AVOID_STDIO
165#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
166 211
167/* 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 */
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
168 253
169#ifndef EV_USE_MONOTONIC 254#ifndef EV_USE_MONOTONIC
170# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 255# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
171# define EV_USE_MONOTONIC 1 256# define EV_USE_MONOTONIC EV_FEATURE_OS
172# else 257# else
173# define EV_USE_MONOTONIC 0 258# define EV_USE_MONOTONIC 0
174# endif 259# endif
175#endif 260#endif
176 261
177#ifndef EV_USE_REALTIME 262#ifndef EV_USE_REALTIME
178# define EV_USE_REALTIME 0 263# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
179#endif 264#endif
180 265
181#ifndef EV_USE_NANOSLEEP 266#ifndef EV_USE_NANOSLEEP
182# if _POSIX_C_SOURCE >= 199309L 267# if _POSIX_C_SOURCE >= 199309L
183# define EV_USE_NANOSLEEP 1 268# define EV_USE_NANOSLEEP EV_FEATURE_OS
184# else 269# else
185# define EV_USE_NANOSLEEP 0 270# define EV_USE_NANOSLEEP 0
186# endif 271# endif
187#endif 272#endif
188 273
189#ifndef EV_USE_SELECT 274#ifndef EV_USE_SELECT
190# define EV_USE_SELECT 1 275# define EV_USE_SELECT EV_FEATURE_BACKENDS
191#endif 276#endif
192 277
193#ifndef EV_USE_POLL 278#ifndef EV_USE_POLL
194# ifdef _WIN32 279# ifdef _WIN32
195# define EV_USE_POLL 0 280# define EV_USE_POLL 0
196# else 281# else
197# define EV_USE_POLL 1 282# define EV_USE_POLL EV_FEATURE_BACKENDS
198# endif 283# endif
199#endif 284#endif
200 285
201#ifndef EV_USE_EPOLL 286#ifndef EV_USE_EPOLL
202# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 287# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
203# define EV_USE_EPOLL 1 288# define EV_USE_EPOLL EV_FEATURE_BACKENDS
204# else 289# else
205# define EV_USE_EPOLL 0 290# define EV_USE_EPOLL 0
206# endif 291# endif
207#endif 292#endif
208 293
… …
214# define EV_USE_PORT 0 299# define EV_USE_PORT 0
215#endif 300#endif
216 301
217#ifndef EV_USE_INOTIFY 302#ifndef EV_USE_INOTIFY
218# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
219# define EV_USE_INOTIFY 1 304# define EV_USE_INOTIFY EV_FEATURE_OS
220# else 305# else
221# define EV_USE_INOTIFY 0 306# define EV_USE_INOTIFY 0
222# endif 307# endif
223#endif 308#endif
224 309
225#ifndef EV_PID_HASHSIZE 310#ifndef EV_PID_HASHSIZE
226# if EV_MINIMAL 311# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
227# define EV_PID_HASHSIZE 1
228# else
229# define EV_PID_HASHSIZE 16
230# endif
231#endif 312#endif
232 313
233#ifndef EV_INOTIFY_HASHSIZE 314#ifndef EV_INOTIFY_HASHSIZE
234# if EV_MINIMAL 315# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
235# define EV_INOTIFY_HASHSIZE 1
236# else
237# define EV_INOTIFY_HASHSIZE 16
238# endif
239#endif 316#endif
240 317
241#ifndef EV_USE_EVENTFD 318#ifndef EV_USE_EVENTFD
242# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 319# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
243# define EV_USE_EVENTFD 1 320# define EV_USE_EVENTFD EV_FEATURE_OS
244# else 321# else
245# define EV_USE_EVENTFD 0 322# define EV_USE_EVENTFD 0
323# endif
324#endif
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
246# endif 331# endif
247#endif 332#endif
248 333
249#if 0 /* debugging */ 334#if 0 /* debugging */
250# define EV_VERIFY 3 335# define EV_VERIFY 3
251# define EV_USE_4HEAP 1 336# define EV_USE_4HEAP 1
252# define EV_HEAP_CACHE_AT 1 337# define EV_HEAP_CACHE_AT 1
253#endif 338#endif
254 339
255#ifndef EV_VERIFY 340#ifndef EV_VERIFY
256# define EV_VERIFY !EV_MINIMAL 341# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
257#endif 342#endif
258 343
259#ifndef EV_USE_4HEAP 344#ifndef EV_USE_4HEAP
260# define EV_USE_4HEAP !EV_MINIMAL 345# define EV_USE_4HEAP EV_FEATURE_DATA
261#endif 346#endif
262 347
263#ifndef EV_HEAP_CACHE_AT 348#ifndef EV_HEAP_CACHE_AT
264# define EV_HEAP_CACHE_AT !EV_MINIMAL 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
265#endif 364#endif
266 365
267/* 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
268 373
269#ifndef CLOCK_MONOTONIC 374#ifndef CLOCK_MONOTONIC
270# undef EV_USE_MONOTONIC 375# undef EV_USE_MONOTONIC
271# define EV_USE_MONOTONIC 0 376# define EV_USE_MONOTONIC 0
272#endif 377#endif
… …
280# undef EV_USE_INOTIFY 385# undef EV_USE_INOTIFY
281# define EV_USE_INOTIFY 0 386# define EV_USE_INOTIFY 0
282#endif 387#endif
283 388
284#if !EV_USE_NANOSLEEP 389#if !EV_USE_NANOSLEEP
285# ifndef _WIN32 390/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux)
286# include <sys/select.h> 392# include <sys/select.h>
287# endif 393# endif
288#endif 394#endif
289 395
290#if EV_USE_INOTIFY 396#if EV_USE_INOTIFY
291# include <sys/utsname.h>
292# include <sys/statfs.h> 397# include <sys/statfs.h>
293# include <sys/inotify.h> 398# include <sys/inotify.h>
294/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 399/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
295# ifndef IN_DONT_FOLLOW 400# ifndef IN_DONT_FOLLOW
296# undef EV_USE_INOTIFY 401# undef EV_USE_INOTIFY
… …
303#endif 408#endif
304 409
305#if EV_USE_EVENTFD 410#if EV_USE_EVENTFD
306/* 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 */
307# include <stdint.h> 412# include <stdint.h>
308# ifdef __cplusplus 413# ifndef EFD_NONBLOCK
309extern "C" { 414# define EFD_NONBLOCK O_NONBLOCK
310# endif 415# endif
311int eventfd (unsigned int initval, int flags); 416# ifndef EFD_CLOEXEC
312# ifdef __cplusplus 417# ifdef O_CLOEXEC
313} 418# define EFD_CLOEXEC O_CLOEXEC
419# else
420# define EFD_CLOEXEC 02000000
421# endif
314# 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};
315#endif 446#endif
316 447
317/**/ 448/**/
318 449
319#if EV_VERIFY >= 3 450#if EV_VERIFY >= 3
320# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 451# define EV_FREQUENT_CHECK ev_verify (EV_A)
321#else 452#else
322# define EV_FREQUENT_CHECK do { } while (0) 453# define EV_FREQUENT_CHECK do { } while (0)
323#endif 454#endif
324 455
325/* 456/*
326 * This is used to avoid floating point rounding problems. 457 * This is used to work around floating point rounding problems.
327 * It is added to ev_rt_now when scheduling periodics
328 * to ensure progress, time-wise, even when rounding
329 * errors are against us.
330 * This value is good at least till the year 4000. 458 * This value is good at least till the year 4000.
331 * Better solutions welcome.
332 */ 459 */
333#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 */
334 462
335#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) */
336#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) */
337/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
338 465
339#if __GNUC__ >= 4 466#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
340# define expect(expr,value) __builtin_expect ((expr),(value)) 467#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
341# define noinline __attribute__ ((noinline)) 468
469/* the following are taken from libecb */
470/* ecb.h start */
471
472/* many compilers define _GNUC_ to some versions but then only implement
473 * what their idiot authors think are the "more important" extensions,
474 * causing enourmous grief in return for some better fake benchmark numbers.
475 * or so.
476 * we try to detect these and simply assume they are not gcc - if they have
477 * an issue with that they should have done it right in the first place.
478 */
479#ifndef ECB_GCC_VERSION
480 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__)
481 #define ECB_GCC_VERSION(major,minor) 0
482 #else
483 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
484 #endif
485#endif
486
487#if __cplusplus
488 #define ecb_inline static inline
489#elif ECB_GCC_VERSION(2,5)
490 #define ecb_inline static __inline__
491#elif ECB_C99
492 #define ecb_inline static inline
342#else 493#else
343# define expect(expr,value) (expr) 494 #define ecb_inline static
344# define noinline
345# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
346# define inline
347# endif 495#endif
496
497#ifndef ECB_MEMORY_FENCE
498 #if ECB_GCC_VERSION(2,5)
499 #if __x86
500 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
501 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
502 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE /* better be safe than sorry */
503 #elif __amd64
504 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
505 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
506 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence")
507 #endif
348#endif 508 #endif
509#endif
349 510
511#ifndef ECB_MEMORY_FENCE
512 #if ECB_GCC_VERSION(4,4)
513 #define ECB_MEMORY_FENCE __sync_synchronize ()
514 #define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); })
515 #define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); })
516 #elif _MSC_VER >= 1400 /* VC++ 2005 */
517 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
518 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
519 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
520 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
521 #elif defined(_WIN32)
522 #include <WinNT.h>
523 #define ECB_MEMORY_FENCE MemoryBarrier ()
524 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
525 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
526 #endif
527#endif
528
529#ifndef ECB_MEMORY_FENCE
530 #include <pthread.h>
531
532 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
533 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
534 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
535 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
536#endif
537
538#if ECB_GCC_VERSION(3,1)
539 #define ecb_attribute(attrlist) __attribute__(attrlist)
540 #define ecb_is_constant(expr) __builtin_constant_p (expr)
541 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
542 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
543#else
544 #define ecb_attribute(attrlist)
545 #define ecb_is_constant(expr) 0
546 #define ecb_expect(expr,value) (expr)
547 #define ecb_prefetch(addr,rw,locality)
548#endif
549
550#define ecb_noinline ecb_attribute ((__noinline__))
551#define ecb_noreturn ecb_attribute ((__noreturn__))
552#define ecb_unused ecb_attribute ((__unused__))
553#define ecb_const ecb_attribute ((__const__))
554#define ecb_pure ecb_attribute ((__pure__))
555
556#if ECB_GCC_VERSION(4,3)
557 #define ecb_artificial ecb_attribute ((__artificial__))
558 #define ecb_hot ecb_attribute ((__hot__))
559 #define ecb_cold ecb_attribute ((__cold__))
560#else
561 #define ecb_artificial
562 #define ecb_hot
563 #define ecb_cold
564#endif
565
566/* put around conditional expressions if you are very sure that the */
567/* expression is mostly true or mostly false. note that these return */
568/* booleans, not the expression. */
350#define expect_false(expr) expect ((expr) != 0, 0) 569#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
351#define expect_true(expr) expect ((expr) != 0, 1) 570#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
571/* ecb.h end */
572
573#define expect_false(cond) ecb_expect_false (cond)
574#define expect_true(cond) ecb_expect_true (cond)
575#define noinline ecb_noinline
576
352#define inline_size static inline 577#define inline_size ecb_inline
353 578
354#if EV_MINIMAL 579#if EV_FEATURE_CODE
580# define inline_speed ecb_inline
581#else
355# define inline_speed static noinline 582# define inline_speed static noinline
583#endif
584
585#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
586
587#if EV_MINPRI == EV_MAXPRI
588# define ABSPRI(w) (((W)w), 0)
356#else 589#else
357# define inline_speed static inline
358#endif
359
360#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
361#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 590# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
591#endif
362 592
363#define EMPTY /* required for microsofts broken pseudo-c compiler */ 593#define EMPTY /* required for microsofts broken pseudo-c compiler */
364#define EMPTY2(a,b) /* used to suppress some warnings */ 594#define EMPTY2(a,b) /* used to suppress some warnings */
365 595
366typedef ev_watcher *W; 596typedef ev_watcher *W;
… …
368typedef ev_watcher_time *WT; 598typedef ev_watcher_time *WT;
369 599
370#define ev_active(w) ((W)(w))->active 600#define ev_active(w) ((W)(w))->active
371#define ev_at(w) ((WT)(w))->at 601#define ev_at(w) ((WT)(w))->at
372 602
603#if EV_USE_REALTIME
604/* sig_atomic_t is used to avoid per-thread variables or locking but still */
605/* giving it a reasonably high chance of working on typical architectures */
606static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
607#endif
608
373#if EV_USE_MONOTONIC 609#if EV_USE_MONOTONIC
374/* sig_atomic_t is used to avoid per-thread variables or locking but still */
375/* giving it a reasonably high chance of working on typical architetcures */
376static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 610static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
611#endif
612
613#ifndef EV_FD_TO_WIN32_HANDLE
614# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
615#endif
616#ifndef EV_WIN32_HANDLE_TO_FD
617# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
618#endif
619#ifndef EV_WIN32_CLOSE_FD
620# define EV_WIN32_CLOSE_FD(fd) close (fd)
377#endif 621#endif
378 622
379#ifdef _WIN32 623#ifdef _WIN32
380# include "ev_win32.c" 624# include "ev_win32.c"
381#endif 625#endif
382 626
383/*****************************************************************************/ 627/*****************************************************************************/
384 628
629/* define a suitable floor function (only used by periodics atm) */
630
631#if EV_USE_FLOOR
632# include <math.h>
633# define ev_floor(v) floor (v)
634#else
635
636#include <float.h>
637
638/* a floor() replacement function, should be independent of ev_tstamp type */
639static ev_tstamp noinline
640ev_floor (ev_tstamp v)
641{
642 /* the choice of shift factor is not terribly important */
643#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
644 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
645#else
646 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
647#endif
648
649 /* argument too large for an unsigned long? */
650 if (expect_false (v >= shift))
651 {
652 ev_tstamp f;
653
654 if (v == v - 1.)
655 return v; /* very large number */
656
657 f = shift * ev_floor (v * (1. / shift));
658 return f + ev_floor (v - f);
659 }
660
661 /* special treatment for negative args? */
662 if (expect_false (v < 0.))
663 {
664 ev_tstamp f = -ev_floor (-v);
665
666 return f - (f == v ? 0 : 1);
667 }
668
669 /* fits into an unsigned long */
670 return (unsigned long)v;
671}
672
673#endif
674
675/*****************************************************************************/
676
677#ifdef __linux
678# include <sys/utsname.h>
679#endif
680
681static unsigned int noinline ecb_cold
682ev_linux_version (void)
683{
684#ifdef __linux
685 unsigned int v = 0;
686 struct utsname buf;
687 int i;
688 char *p = buf.release;
689
690 if (uname (&buf))
691 return 0;
692
693 for (i = 3+1; --i; )
694 {
695 unsigned int c = 0;
696
697 for (;;)
698 {
699 if (*p >= '0' && *p <= '9')
700 c = c * 10 + *p++ - '0';
701 else
702 {
703 p += *p == '.';
704 break;
705 }
706 }
707
708 v = (v << 8) | c;
709 }
710
711 return v;
712#else
713 return 0;
714#endif
715}
716
717/*****************************************************************************/
718
719#if EV_AVOID_STDIO
720static void noinline ecb_cold
721ev_printerr (const char *msg)
722{
723 write (STDERR_FILENO, msg, strlen (msg));
724}
725#endif
726
385static void (*syserr_cb)(const char *msg); 727static void (*syserr_cb)(const char *msg);
386 728
387void 729void ecb_cold
388ev_set_syserr_cb (void (*cb)(const char *msg)) 730ev_set_syserr_cb (void (*cb)(const char *msg))
389{ 731{
390 syserr_cb = cb; 732 syserr_cb = cb;
391} 733}
392 734
393static void noinline 735static void noinline ecb_cold
394ev_syserr (const char *msg) 736ev_syserr (const char *msg)
395{ 737{
396 if (!msg) 738 if (!msg)
397 msg = "(libev) system error"; 739 msg = "(libev) system error";
398 740
399 if (syserr_cb) 741 if (syserr_cb)
400 syserr_cb (msg); 742 syserr_cb (msg);
401 else 743 else
402 { 744 {
745#if EV_AVOID_STDIO
746 ev_printerr (msg);
747 ev_printerr (": ");
748 ev_printerr (strerror (errno));
749 ev_printerr ("\n");
750#else
403 perror (msg); 751 perror (msg);
752#endif
404 abort (); 753 abort ();
405 } 754 }
406} 755}
407 756
408static void * 757static void *
409ev_realloc_emul (void *ptr, long size) 758ev_realloc_emul (void *ptr, long size)
410{ 759{
760#if __GLIBC__
761 return realloc (ptr, size);
762#else
411 /* some systems, notably openbsd and darwin, fail to properly 763 /* some systems, notably openbsd and darwin, fail to properly
412 * implement realloc (x, 0) (as required by both ansi c-98 and 764 * implement realloc (x, 0) (as required by both ansi c-89 and
413 * the single unix specification, so work around them here. 765 * the single unix specification, so work around them here.
414 */ 766 */
415 767
416 if (size) 768 if (size)
417 return realloc (ptr, size); 769 return realloc (ptr, size);
418 770
419 free (ptr); 771 free (ptr);
420 return 0; 772 return 0;
773#endif
421} 774}
422 775
423static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 776static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
424 777
425void 778void ecb_cold
426ev_set_allocator (void *(*cb)(void *ptr, long size)) 779ev_set_allocator (void *(*cb)(void *ptr, long size))
427{ 780{
428 alloc = cb; 781 alloc = cb;
429} 782}
430 783
… …
433{ 786{
434 ptr = alloc (ptr, size); 787 ptr = alloc (ptr, size);
435 788
436 if (!ptr && size) 789 if (!ptr && size)
437 { 790 {
791#if EV_AVOID_STDIO
792 ev_printerr ("(libev) memory allocation failed, aborting.\n");
793#else
438 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 794 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
795#endif
439 abort (); 796 abort ();
440 } 797 }
441 798
442 return ptr; 799 return ptr;
443} 800}
… …
445#define ev_malloc(size) ev_realloc (0, (size)) 802#define ev_malloc(size) ev_realloc (0, (size))
446#define ev_free(ptr) ev_realloc ((ptr), 0) 803#define ev_free(ptr) ev_realloc ((ptr), 0)
447 804
448/*****************************************************************************/ 805/*****************************************************************************/
449 806
807/* set in reify when reification needed */
808#define EV_ANFD_REIFY 1
809
810/* file descriptor info structure */
450typedef struct 811typedef struct
451{ 812{
452 WL head; 813 WL head;
453 unsigned char events; 814 unsigned char events; /* the events watched for */
454 unsigned char reify; 815 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
455 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 816 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
456 unsigned char unused; 817 unsigned char unused;
457#if EV_USE_EPOLL 818#if EV_USE_EPOLL
458 unsigned int egen; /* generation counter to counter epoll bugs */ 819 unsigned int egen; /* generation counter to counter epoll bugs */
459#endif 820#endif
460#if EV_SELECT_IS_WINSOCKET 821#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
461 SOCKET handle; 822 SOCKET handle;
462#endif 823#endif
824#if EV_USE_IOCP
825 OVERLAPPED or, ow;
826#endif
463} ANFD; 827} ANFD;
464 828
829/* stores the pending event set for a given watcher */
465typedef struct 830typedef struct
466{ 831{
467 W w; 832 W w;
468 int events; 833 int events; /* the pending event set for the given watcher */
469} ANPENDING; 834} ANPENDING;
470 835
471#if EV_USE_INOTIFY 836#if EV_USE_INOTIFY
472/* hash table entry per inotify-id */ 837/* hash table entry per inotify-id */
473typedef struct 838typedef struct
… …
476} ANFS; 841} ANFS;
477#endif 842#endif
478 843
479/* Heap Entry */ 844/* Heap Entry */
480#if EV_HEAP_CACHE_AT 845#if EV_HEAP_CACHE_AT
846 /* a heap element */
481 typedef struct { 847 typedef struct {
482 ev_tstamp at; 848 ev_tstamp at;
483 WT w; 849 WT w;
484 } ANHE; 850 } ANHE;
485 851
486 #define ANHE_w(he) (he).w /* access watcher, read-write */ 852 #define ANHE_w(he) (he).w /* access watcher, read-write */
487 #define ANHE_at(he) (he).at /* access cached at, read-only */ 853 #define ANHE_at(he) (he).at /* access cached at, read-only */
488 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */ 854 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
489#else 855#else
856 /* a heap element */
490 typedef WT ANHE; 857 typedef WT ANHE;
491 858
492 #define ANHE_w(he) (he) 859 #define ANHE_w(he) (he)
493 #define ANHE_at(he) (he)->at 860 #define ANHE_at(he) (he)->at
494 #define ANHE_at_cache(he) 861 #define ANHE_at_cache(he)
… …
518 885
519 static int ev_default_loop_ptr; 886 static int ev_default_loop_ptr;
520 887
521#endif 888#endif
522 889
890#if EV_FEATURE_API
891# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
892# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
893# define EV_INVOKE_PENDING invoke_cb (EV_A)
894#else
895# define EV_RELEASE_CB (void)0
896# define EV_ACQUIRE_CB (void)0
897# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
898#endif
899
900#define EVBREAK_RECURSE 0x80
901
523/*****************************************************************************/ 902/*****************************************************************************/
524 903
904#ifndef EV_HAVE_EV_TIME
525ev_tstamp 905ev_tstamp
526ev_time (void) 906ev_time (void)
527{ 907{
528#if EV_USE_REALTIME 908#if EV_USE_REALTIME
909 if (expect_true (have_realtime))
910 {
529 struct timespec ts; 911 struct timespec ts;
530 clock_gettime (CLOCK_REALTIME, &ts); 912 clock_gettime (CLOCK_REALTIME, &ts);
531 return ts.tv_sec + ts.tv_nsec * 1e-9; 913 return ts.tv_sec + ts.tv_nsec * 1e-9;
532#else 914 }
915#endif
916
533 struct timeval tv; 917 struct timeval tv;
534 gettimeofday (&tv, 0); 918 gettimeofday (&tv, 0);
535 return tv.tv_sec + tv.tv_usec * 1e-6; 919 return tv.tv_sec + tv.tv_usec * 1e-6;
536#endif
537} 920}
921#endif
538 922
539ev_tstamp inline_size 923inline_size ev_tstamp
540get_clock (void) 924get_clock (void)
541{ 925{
542#if EV_USE_MONOTONIC 926#if EV_USE_MONOTONIC
543 if (expect_true (have_monotonic)) 927 if (expect_true (have_monotonic))
544 { 928 {
… …
565 if (delay > 0.) 949 if (delay > 0.)
566 { 950 {
567#if EV_USE_NANOSLEEP 951#if EV_USE_NANOSLEEP
568 struct timespec ts; 952 struct timespec ts;
569 953
570 ts.tv_sec = (time_t)delay; 954 EV_TS_SET (ts, delay);
571 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
572
573 nanosleep (&ts, 0); 955 nanosleep (&ts, 0);
574#elif defined(_WIN32) 956#elif defined(_WIN32)
575 Sleep ((unsigned long)(delay * 1e3)); 957 Sleep ((unsigned long)(delay * 1e3));
576#else 958#else
577 struct timeval tv; 959 struct timeval tv;
578 960
579 tv.tv_sec = (time_t)delay;
580 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
581
582 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 961 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
583 /* somehting nto guaranteed by newer posix versions, but guaranteed */ 962 /* something not guaranteed by newer posix versions, but guaranteed */
584 /* by older ones */ 963 /* by older ones */
964 EV_TV_SET (tv, delay);
585 select (0, 0, 0, 0, &tv); 965 select (0, 0, 0, 0, &tv);
586#endif 966#endif
587 } 967 }
588} 968}
589 969
590/*****************************************************************************/ 970/*****************************************************************************/
591 971
592#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 972#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
593 973
594int inline_size 974/* find a suitable new size for the given array, */
975/* hopefully by rounding to a nice-to-malloc size */
976inline_size int
595array_nextsize (int elem, int cur, int cnt) 977array_nextsize (int elem, int cur, int cnt)
596{ 978{
597 int ncur = cur + 1; 979 int ncur = cur + 1;
598 980
599 do 981 do
… …
610 } 992 }
611 993
612 return ncur; 994 return ncur;
613} 995}
614 996
615static noinline void * 997static void * noinline ecb_cold
616array_realloc (int elem, void *base, int *cur, int cnt) 998array_realloc (int elem, void *base, int *cur, int cnt)
617{ 999{
618 *cur = array_nextsize (elem, *cur, cnt); 1000 *cur = array_nextsize (elem, *cur, cnt);
619 return ev_realloc (base, elem * *cur); 1001 return ev_realloc (base, elem * *cur);
620} 1002}
… …
623 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1005 memset ((void *)(base), 0, sizeof (*(base)) * (count))
624 1006
625#define array_needsize(type,base,cur,cnt,init) \ 1007#define array_needsize(type,base,cur,cnt,init) \
626 if (expect_false ((cnt) > (cur))) \ 1008 if (expect_false ((cnt) > (cur))) \
627 { \ 1009 { \
628 int ocur_ = (cur); \ 1010 int ecb_unused ocur_ = (cur); \
629 (base) = (type *)array_realloc \ 1011 (base) = (type *)array_realloc \
630 (sizeof (type), (base), &(cur), (cnt)); \ 1012 (sizeof (type), (base), &(cur), (cnt)); \
631 init ((base) + (ocur_), (cur) - ocur_); \ 1013 init ((base) + (ocur_), (cur) - ocur_); \
632 } 1014 }
633 1015
… …
640 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1022 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
641 } 1023 }
642#endif 1024#endif
643 1025
644#define array_free(stem, idx) \ 1026#define array_free(stem, idx) \
645 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1027 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
646 1028
647/*****************************************************************************/ 1029/*****************************************************************************/
1030
1031/* dummy callback for pending events */
1032static void noinline
1033pendingcb (EV_P_ ev_prepare *w, int revents)
1034{
1035}
648 1036
649void noinline 1037void noinline
650ev_feed_event (EV_P_ void *w, int revents) 1038ev_feed_event (EV_P_ void *w, int revents)
651{ 1039{
652 W w_ = (W)w; 1040 W w_ = (W)w;
… …
661 pendings [pri][w_->pending - 1].w = w_; 1049 pendings [pri][w_->pending - 1].w = w_;
662 pendings [pri][w_->pending - 1].events = revents; 1050 pendings [pri][w_->pending - 1].events = revents;
663 } 1051 }
664} 1052}
665 1053
666void inline_speed 1054inline_speed void
1055feed_reverse (EV_P_ W w)
1056{
1057 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1058 rfeeds [rfeedcnt++] = w;
1059}
1060
1061inline_size void
1062feed_reverse_done (EV_P_ int revents)
1063{
1064 do
1065 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1066 while (rfeedcnt);
1067}
1068
1069inline_speed void
667queue_events (EV_P_ W *events, int eventcnt, int type) 1070queue_events (EV_P_ W *events, int eventcnt, int type)
668{ 1071{
669 int i; 1072 int i;
670 1073
671 for (i = 0; i < eventcnt; ++i) 1074 for (i = 0; i < eventcnt; ++i)
672 ev_feed_event (EV_A_ events [i], type); 1075 ev_feed_event (EV_A_ events [i], type);
673} 1076}
674 1077
675/*****************************************************************************/ 1078/*****************************************************************************/
676 1079
677void inline_speed 1080inline_speed void
678fd_event (EV_P_ int fd, int revents) 1081fd_event_nocheck (EV_P_ int fd, int revents)
679{ 1082{
680 ANFD *anfd = anfds + fd; 1083 ANFD *anfd = anfds + fd;
681 ev_io *w; 1084 ev_io *w;
682 1085
683 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1086 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
687 if (ev) 1090 if (ev)
688 ev_feed_event (EV_A_ (W)w, ev); 1091 ev_feed_event (EV_A_ (W)w, ev);
689 } 1092 }
690} 1093}
691 1094
1095/* do not submit kernel events for fds that have reify set */
1096/* because that means they changed while we were polling for new events */
1097inline_speed void
1098fd_event (EV_P_ int fd, int revents)
1099{
1100 ANFD *anfd = anfds + fd;
1101
1102 if (expect_true (!anfd->reify))
1103 fd_event_nocheck (EV_A_ fd, revents);
1104}
1105
692void 1106void
693ev_feed_fd_event (EV_P_ int fd, int revents) 1107ev_feed_fd_event (EV_P_ int fd, int revents)
694{ 1108{
695 if (fd >= 0 && fd < anfdmax) 1109 if (fd >= 0 && fd < anfdmax)
696 fd_event (EV_A_ fd, revents); 1110 fd_event_nocheck (EV_A_ fd, revents);
697} 1111}
698 1112
699void inline_size 1113/* make sure the external fd watch events are in-sync */
1114/* with the kernel/libev internal state */
1115inline_size void
700fd_reify (EV_P) 1116fd_reify (EV_P)
701{ 1117{
702 int i; 1118 int i;
1119
1120#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1121 for (i = 0; i < fdchangecnt; ++i)
1122 {
1123 int fd = fdchanges [i];
1124 ANFD *anfd = anfds + fd;
1125
1126 if (anfd->reify & EV__IOFDSET && anfd->head)
1127 {
1128 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1129
1130 if (handle != anfd->handle)
1131 {
1132 unsigned long arg;
1133
1134 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1135
1136 /* handle changed, but fd didn't - we need to do it in two steps */
1137 backend_modify (EV_A_ fd, anfd->events, 0);
1138 anfd->events = 0;
1139 anfd->handle = handle;
1140 }
1141 }
1142 }
1143#endif
703 1144
704 for (i = 0; i < fdchangecnt; ++i) 1145 for (i = 0; i < fdchangecnt; ++i)
705 { 1146 {
706 int fd = fdchanges [i]; 1147 int fd = fdchanges [i];
707 ANFD *anfd = anfds + fd; 1148 ANFD *anfd = anfds + fd;
708 ev_io *w; 1149 ev_io *w;
709 1150
710 unsigned char events = 0; 1151 unsigned char o_events = anfd->events;
1152 unsigned char o_reify = anfd->reify;
711 1153
712 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1154 anfd->reify = 0;
713 events |= (unsigned char)w->events;
714 1155
715#if EV_SELECT_IS_WINSOCKET 1156 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
716 if (events)
717 { 1157 {
718 unsigned long arg; 1158 anfd->events = 0;
719 #ifdef EV_FD_TO_WIN32_HANDLE 1159
720 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1160 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
721 #else 1161 anfd->events |= (unsigned char)w->events;
722 anfd->handle = _get_osfhandle (fd); 1162
723 #endif 1163 if (o_events != anfd->events)
724 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 1164 o_reify = EV__IOFDSET; /* actually |= */
725 } 1165 }
726#endif
727 1166
728 { 1167 if (o_reify & EV__IOFDSET)
729 unsigned char o_events = anfd->events;
730 unsigned char o_reify = anfd->reify;
731
732 anfd->reify = 0;
733 anfd->events = events;
734
735 if (o_events != events || o_reify & EV_IOFDSET)
736 backend_modify (EV_A_ fd, o_events, events); 1168 backend_modify (EV_A_ fd, o_events, anfd->events);
737 }
738 } 1169 }
739 1170
740 fdchangecnt = 0; 1171 fdchangecnt = 0;
741} 1172}
742 1173
743void inline_size 1174/* something about the given fd changed */
1175inline_size void
744fd_change (EV_P_ int fd, int flags) 1176fd_change (EV_P_ int fd, int flags)
745{ 1177{
746 unsigned char reify = anfds [fd].reify; 1178 unsigned char reify = anfds [fd].reify;
747 anfds [fd].reify |= flags; 1179 anfds [fd].reify |= flags;
748 1180
… …
752 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1184 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
753 fdchanges [fdchangecnt - 1] = fd; 1185 fdchanges [fdchangecnt - 1] = fd;
754 } 1186 }
755} 1187}
756 1188
757void inline_speed 1189/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1190inline_speed void ecb_cold
758fd_kill (EV_P_ int fd) 1191fd_kill (EV_P_ int fd)
759{ 1192{
760 ev_io *w; 1193 ev_io *w;
761 1194
762 while ((w = (ev_io *)anfds [fd].head)) 1195 while ((w = (ev_io *)anfds [fd].head))
… …
764 ev_io_stop (EV_A_ w); 1197 ev_io_stop (EV_A_ w);
765 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1198 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
766 } 1199 }
767} 1200}
768 1201
769int inline_size 1202/* check whether the given fd is actually valid, for error recovery */
1203inline_size int ecb_cold
770fd_valid (int fd) 1204fd_valid (int fd)
771{ 1205{
772#ifdef _WIN32 1206#ifdef _WIN32
773 return _get_osfhandle (fd) != -1; 1207 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
774#else 1208#else
775 return fcntl (fd, F_GETFD) != -1; 1209 return fcntl (fd, F_GETFD) != -1;
776#endif 1210#endif
777} 1211}
778 1212
779/* called on EBADF to verify fds */ 1213/* called on EBADF to verify fds */
780static void noinline 1214static void noinline ecb_cold
781fd_ebadf (EV_P) 1215fd_ebadf (EV_P)
782{ 1216{
783 int fd; 1217 int fd;
784 1218
785 for (fd = 0; fd < anfdmax; ++fd) 1219 for (fd = 0; fd < anfdmax; ++fd)
… …
787 if (!fd_valid (fd) && errno == EBADF) 1221 if (!fd_valid (fd) && errno == EBADF)
788 fd_kill (EV_A_ fd); 1222 fd_kill (EV_A_ fd);
789} 1223}
790 1224
791/* called on ENOMEM in select/poll to kill some fds and retry */ 1225/* called on ENOMEM in select/poll to kill some fds and retry */
792static void noinline 1226static void noinline ecb_cold
793fd_enomem (EV_P) 1227fd_enomem (EV_P)
794{ 1228{
795 int fd; 1229 int fd;
796 1230
797 for (fd = anfdmax; fd--; ) 1231 for (fd = anfdmax; fd--; )
798 if (anfds [fd].events) 1232 if (anfds [fd].events)
799 { 1233 {
800 fd_kill (EV_A_ fd); 1234 fd_kill (EV_A_ fd);
801 return; 1235 break;
802 } 1236 }
803} 1237}
804 1238
805/* usually called after fork if backend needs to re-arm all fds from scratch */ 1239/* usually called after fork if backend needs to re-arm all fds from scratch */
806static void noinline 1240static void noinline
… …
811 for (fd = 0; fd < anfdmax; ++fd) 1245 for (fd = 0; fd < anfdmax; ++fd)
812 if (anfds [fd].events) 1246 if (anfds [fd].events)
813 { 1247 {
814 anfds [fd].events = 0; 1248 anfds [fd].events = 0;
815 anfds [fd].emask = 0; 1249 anfds [fd].emask = 0;
816 fd_change (EV_A_ fd, EV_IOFDSET | 1); 1250 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
817 } 1251 }
818} 1252}
819 1253
1254/* used to prepare libev internal fd's */
1255/* this is not fork-safe */
1256inline_speed void
1257fd_intern (int fd)
1258{
1259#ifdef _WIN32
1260 unsigned long arg = 1;
1261 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1262#else
1263 fcntl (fd, F_SETFD, FD_CLOEXEC);
1264 fcntl (fd, F_SETFL, O_NONBLOCK);
1265#endif
1266}
1267
820/*****************************************************************************/ 1268/*****************************************************************************/
821 1269
822/* 1270/*
823 * the heap functions want a real array index. array index 0 uis guaranteed to not 1271 * the heap functions want a real array index. array index 0 is guaranteed to not
824 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives 1272 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
825 * the branching factor of the d-tree. 1273 * the branching factor of the d-tree.
826 */ 1274 */
827 1275
828/* 1276/*
… …
837#define HEAP0 (DHEAP - 1) /* index of first element in heap */ 1285#define HEAP0 (DHEAP - 1) /* index of first element in heap */
838#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0) 1286#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
839#define UPHEAP_DONE(p,k) ((p) == (k)) 1287#define UPHEAP_DONE(p,k) ((p) == (k))
840 1288
841/* away from the root */ 1289/* away from the root */
842void inline_speed 1290inline_speed void
843downheap (ANHE *heap, int N, int k) 1291downheap (ANHE *heap, int N, int k)
844{ 1292{
845 ANHE he = heap [k]; 1293 ANHE he = heap [k];
846 ANHE *E = heap + N + HEAP0; 1294 ANHE *E = heap + N + HEAP0;
847 1295
… …
887#define HEAP0 1 1335#define HEAP0 1
888#define HPARENT(k) ((k) >> 1) 1336#define HPARENT(k) ((k) >> 1)
889#define UPHEAP_DONE(p,k) (!(p)) 1337#define UPHEAP_DONE(p,k) (!(p))
890 1338
891/* away from the root */ 1339/* away from the root */
892void inline_speed 1340inline_speed void
893downheap (ANHE *heap, int N, int k) 1341downheap (ANHE *heap, int N, int k)
894{ 1342{
895 ANHE he = heap [k]; 1343 ANHE he = heap [k];
896 1344
897 for (;;) 1345 for (;;)
898 { 1346 {
899 int c = k << 1; 1347 int c = k << 1;
900 1348
901 if (c > N + HEAP0 - 1) 1349 if (c >= N + HEAP0)
902 break; 1350 break;
903 1351
904 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) 1352 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
905 ? 1 : 0; 1353 ? 1 : 0;
906 1354
… …
917 ev_active (ANHE_w (he)) = k; 1365 ev_active (ANHE_w (he)) = k;
918} 1366}
919#endif 1367#endif
920 1368
921/* towards the root */ 1369/* towards the root */
922void inline_speed 1370inline_speed void
923upheap (ANHE *heap, int k) 1371upheap (ANHE *heap, int k)
924{ 1372{
925 ANHE he = heap [k]; 1373 ANHE he = heap [k];
926 1374
927 for (;;) 1375 for (;;)
… …
938 1386
939 heap [k] = he; 1387 heap [k] = he;
940 ev_active (ANHE_w (he)) = k; 1388 ev_active (ANHE_w (he)) = k;
941} 1389}
942 1390
943void inline_size 1391/* move an element suitably so it is in a correct place */
1392inline_size void
944adjustheap (ANHE *heap, int N, int k) 1393adjustheap (ANHE *heap, int N, int k)
945{ 1394{
946 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k])) 1395 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
947 upheap (heap, k); 1396 upheap (heap, k);
948 else 1397 else
949 downheap (heap, N, k); 1398 downheap (heap, N, k);
950} 1399}
951 1400
952/* rebuild the heap: this function is used only once and executed rarely */ 1401/* rebuild the heap: this function is used only once and executed rarely */
953void inline_size 1402inline_size void
954reheap (ANHE *heap, int N) 1403reheap (ANHE *heap, int N)
955{ 1404{
956 int i; 1405 int i;
957 1406
958 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */ 1407 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
… …
961 upheap (heap, i + HEAP0); 1410 upheap (heap, i + HEAP0);
962} 1411}
963 1412
964/*****************************************************************************/ 1413/*****************************************************************************/
965 1414
1415/* associate signal watchers to a signal signal */
966typedef struct 1416typedef struct
967{ 1417{
1418 EV_ATOMIC_T pending;
1419#if EV_MULTIPLICITY
1420 EV_P;
1421#endif
968 WL head; 1422 WL head;
969 EV_ATOMIC_T gotsig;
970} ANSIG; 1423} ANSIG;
971 1424
972static ANSIG *signals; 1425static ANSIG signals [EV_NSIG - 1];
973static int signalmax;
974
975static EV_ATOMIC_T gotsig;
976 1426
977/*****************************************************************************/ 1427/*****************************************************************************/
978 1428
979void inline_speed 1429#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
980fd_intern (int fd)
981{
982#ifdef _WIN32
983 unsigned long arg = 1;
984 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
985#else
986 fcntl (fd, F_SETFD, FD_CLOEXEC);
987 fcntl (fd, F_SETFL, O_NONBLOCK);
988#endif
989}
990 1430
991static void noinline 1431static void noinline ecb_cold
992evpipe_init (EV_P) 1432evpipe_init (EV_P)
993{ 1433{
994 if (!ev_is_active (&pipeev)) 1434 if (!ev_is_active (&pipe_w))
995 { 1435 {
996#if EV_USE_EVENTFD 1436# if EV_USE_EVENTFD
1437 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1438 if (evfd < 0 && errno == EINVAL)
997 if ((evfd = eventfd (0, 0)) >= 0) 1439 evfd = eventfd (0, 0);
1440
1441 if (evfd >= 0)
998 { 1442 {
999 evpipe [0] = -1; 1443 evpipe [0] = -1;
1000 fd_intern (evfd); 1444 fd_intern (evfd); /* doing it twice doesn't hurt */
1001 ev_io_set (&pipeev, evfd, EV_READ); 1445 ev_io_set (&pipe_w, evfd, EV_READ);
1002 } 1446 }
1003 else 1447 else
1004#endif 1448# endif
1005 { 1449 {
1006 while (pipe (evpipe)) 1450 while (pipe (evpipe))
1007 ev_syserr ("(libev) error creating signal/async pipe"); 1451 ev_syserr ("(libev) error creating signal/async pipe");
1008 1452
1009 fd_intern (evpipe [0]); 1453 fd_intern (evpipe [0]);
1010 fd_intern (evpipe [1]); 1454 fd_intern (evpipe [1]);
1011 ev_io_set (&pipeev, evpipe [0], EV_READ); 1455 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1012 } 1456 }
1013 1457
1014 ev_io_start (EV_A_ &pipeev); 1458 ev_io_start (EV_A_ &pipe_w);
1015 ev_unref (EV_A); /* watcher should not keep loop alive */ 1459 ev_unref (EV_A); /* watcher should not keep loop alive */
1016 } 1460 }
1017} 1461}
1018 1462
1019void inline_size 1463inline_speed void
1020evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1464evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1021{ 1465{
1022 if (!*flag) 1466 if (expect_true (*flag))
1467 return;
1468
1469 *flag = 1;
1470
1471 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1472
1473 pipe_write_skipped = 1;
1474
1475 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1476
1477 if (pipe_write_wanted)
1023 { 1478 {
1479 int old_errno;
1480
1481 pipe_write_skipped = 0; /* just an optimsiation, no fence needed */
1482
1024 int old_errno = errno; /* save errno because write might clobber it */ 1483 old_errno = errno; /* save errno because write will clobber it */
1025
1026 *flag = 1;
1027 1484
1028#if EV_USE_EVENTFD 1485#if EV_USE_EVENTFD
1029 if (evfd >= 0) 1486 if (evfd >= 0)
1030 { 1487 {
1031 uint64_t counter = 1; 1488 uint64_t counter = 1;
1032 write (evfd, &counter, sizeof (uint64_t)); 1489 write (evfd, &counter, sizeof (uint64_t));
1033 } 1490 }
1034 else 1491 else
1035#endif 1492#endif
1493 {
1494 /* win32 people keep sending patches that change this write() to send() */
1495 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1496 /* so when you think this write should be a send instead, please find out */
1497 /* where your send() is from - it's definitely not the microsoft send, and */
1498 /* tell me. thank you. */
1036 write (evpipe [1], &old_errno, 1); 1499 write (evpipe [1], &(evpipe [1]), 1);
1500 }
1037 1501
1038 errno = old_errno; 1502 errno = old_errno;
1039 } 1503 }
1040} 1504}
1041 1505
1506/* called whenever the libev signal pipe */
1507/* got some events (signal, async) */
1042static void 1508static void
1043pipecb (EV_P_ ev_io *iow, int revents) 1509pipecb (EV_P_ ev_io *iow, int revents)
1044{ 1510{
1511 int i;
1512
1513 if (revents & EV_READ)
1514 {
1045#if EV_USE_EVENTFD 1515#if EV_USE_EVENTFD
1046 if (evfd >= 0) 1516 if (evfd >= 0)
1047 { 1517 {
1048 uint64_t counter; 1518 uint64_t counter;
1049 read (evfd, &counter, sizeof (uint64_t)); 1519 read (evfd, &counter, sizeof (uint64_t));
1050 } 1520 }
1051 else 1521 else
1052#endif 1522#endif
1053 { 1523 {
1054 char dummy; 1524 char dummy;
1525 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1055 read (evpipe [0], &dummy, 1); 1526 read (evpipe [0], &dummy, 1);
1527 }
1528 }
1529
1530 pipe_write_skipped = 0;
1531
1532#if EV_SIGNAL_ENABLE
1533 if (sig_pending)
1056 } 1534 {
1535 sig_pending = 0;
1057 1536
1058 if (gotsig && ev_is_default_loop (EV_A)) 1537 for (i = EV_NSIG - 1; i--; )
1059 { 1538 if (expect_false (signals [i].pending))
1060 int signum;
1061 gotsig = 0;
1062
1063 for (signum = signalmax; signum--; )
1064 if (signals [signum].gotsig)
1065 ev_feed_signal_event (EV_A_ signum + 1); 1539 ev_feed_signal_event (EV_A_ i + 1);
1066 } 1540 }
1541#endif
1067 1542
1068#if EV_ASYNC_ENABLE 1543#if EV_ASYNC_ENABLE
1069 if (gotasync) 1544 if (async_pending)
1070 { 1545 {
1071 int i; 1546 async_pending = 0;
1072 gotasync = 0;
1073 1547
1074 for (i = asynccnt; i--; ) 1548 for (i = asynccnt; i--; )
1075 if (asyncs [i]->sent) 1549 if (asyncs [i]->sent)
1076 { 1550 {
1077 asyncs [i]->sent = 0; 1551 asyncs [i]->sent = 0;
… …
1081#endif 1555#endif
1082} 1556}
1083 1557
1084/*****************************************************************************/ 1558/*****************************************************************************/
1085 1559
1560void
1561ev_feed_signal (int signum)
1562{
1563#if EV_MULTIPLICITY
1564 EV_P = signals [signum - 1].loop;
1565
1566 if (!EV_A)
1567 return;
1568#endif
1569
1570 if (!ev_active (&pipe_w))
1571 return;
1572
1573 signals [signum - 1].pending = 1;
1574 evpipe_write (EV_A_ &sig_pending);
1575}
1576
1086static void 1577static void
1087ev_sighandler (int signum) 1578ev_sighandler (int signum)
1088{ 1579{
1089#if EV_MULTIPLICITY
1090 struct ev_loop *loop = &default_loop_struct;
1091#endif
1092
1093#if _WIN32 1580#ifdef _WIN32
1094 signal (signum, ev_sighandler); 1581 signal (signum, ev_sighandler);
1095#endif 1582#endif
1096 1583
1097 signals [signum - 1].gotsig = 1; 1584 ev_feed_signal (signum);
1098 evpipe_write (EV_A_ &gotsig);
1099} 1585}
1100 1586
1101void noinline 1587void noinline
1102ev_feed_signal_event (EV_P_ int signum) 1588ev_feed_signal_event (EV_P_ int signum)
1103{ 1589{
1104 WL w; 1590 WL w;
1105 1591
1592 if (expect_false (signum <= 0 || signum > EV_NSIG))
1593 return;
1594
1595 --signum;
1596
1106#if EV_MULTIPLICITY 1597#if EV_MULTIPLICITY
1107 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr)); 1598 /* it is permissible to try to feed a signal to the wrong loop */
1108#endif 1599 /* or, likely more useful, feeding a signal nobody is waiting for */
1109 1600
1110 --signum; 1601 if (expect_false (signals [signum].loop != EV_A))
1111
1112 if (signum < 0 || signum >= signalmax)
1113 return; 1602 return;
1603#endif
1114 1604
1115 signals [signum].gotsig = 0; 1605 signals [signum].pending = 0;
1116 1606
1117 for (w = signals [signum].head; w; w = w->next) 1607 for (w = signals [signum].head; w; w = w->next)
1118 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1608 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1119} 1609}
1120 1610
1611#if EV_USE_SIGNALFD
1612static void
1613sigfdcb (EV_P_ ev_io *iow, int revents)
1614{
1615 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1616
1617 for (;;)
1618 {
1619 ssize_t res = read (sigfd, si, sizeof (si));
1620
1621 /* not ISO-C, as res might be -1, but works with SuS */
1622 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1623 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1624
1625 if (res < (ssize_t)sizeof (si))
1626 break;
1627 }
1628}
1629#endif
1630
1631#endif
1632
1121/*****************************************************************************/ 1633/*****************************************************************************/
1122 1634
1635#if EV_CHILD_ENABLE
1123static WL childs [EV_PID_HASHSIZE]; 1636static WL childs [EV_PID_HASHSIZE];
1124
1125#ifndef _WIN32
1126 1637
1127static ev_signal childev; 1638static ev_signal childev;
1128 1639
1129#ifndef WIFCONTINUED 1640#ifndef WIFCONTINUED
1130# define WIFCONTINUED(status) 0 1641# define WIFCONTINUED(status) 0
1131#endif 1642#endif
1132 1643
1133void inline_speed 1644/* handle a single child status event */
1645inline_speed void
1134child_reap (EV_P_ int chain, int pid, int status) 1646child_reap (EV_P_ int chain, int pid, int status)
1135{ 1647{
1136 ev_child *w; 1648 ev_child *w;
1137 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 1649 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1138 1650
1139 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1651 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1140 { 1652 {
1141 if ((w->pid == pid || !w->pid) 1653 if ((w->pid == pid || !w->pid)
1142 && (!traced || (w->flags & 1))) 1654 && (!traced || (w->flags & 1)))
1143 { 1655 {
1144 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 1656 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
1151 1663
1152#ifndef WCONTINUED 1664#ifndef WCONTINUED
1153# define WCONTINUED 0 1665# define WCONTINUED 0
1154#endif 1666#endif
1155 1667
1668/* called on sigchld etc., calls waitpid */
1156static void 1669static void
1157childcb (EV_P_ ev_signal *sw, int revents) 1670childcb (EV_P_ ev_signal *sw, int revents)
1158{ 1671{
1159 int pid, status; 1672 int pid, status;
1160 1673
… …
1168 /* make sure we are called again until all children have been reaped */ 1681 /* make sure we are called again until all children have been reaped */
1169 /* we need to do it this way so that the callback gets called before we continue */ 1682 /* we need to do it this way so that the callback gets called before we continue */
1170 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1683 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1171 1684
1172 child_reap (EV_A_ pid, pid, status); 1685 child_reap (EV_A_ pid, pid, status);
1173 if (EV_PID_HASHSIZE > 1) 1686 if ((EV_PID_HASHSIZE) > 1)
1174 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1687 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1175} 1688}
1176 1689
1177#endif 1690#endif
1178 1691
1179/*****************************************************************************/ 1692/*****************************************************************************/
1180 1693
1694#if EV_USE_IOCP
1695# include "ev_iocp.c"
1696#endif
1181#if EV_USE_PORT 1697#if EV_USE_PORT
1182# include "ev_port.c" 1698# include "ev_port.c"
1183#endif 1699#endif
1184#if EV_USE_KQUEUE 1700#if EV_USE_KQUEUE
1185# include "ev_kqueue.c" 1701# include "ev_kqueue.c"
… …
1192#endif 1708#endif
1193#if EV_USE_SELECT 1709#if EV_USE_SELECT
1194# include "ev_select.c" 1710# include "ev_select.c"
1195#endif 1711#endif
1196 1712
1197int 1713int ecb_cold
1198ev_version_major (void) 1714ev_version_major (void)
1199{ 1715{
1200 return EV_VERSION_MAJOR; 1716 return EV_VERSION_MAJOR;
1201} 1717}
1202 1718
1203int 1719int ecb_cold
1204ev_version_minor (void) 1720ev_version_minor (void)
1205{ 1721{
1206 return EV_VERSION_MINOR; 1722 return EV_VERSION_MINOR;
1207} 1723}
1208 1724
1209/* return true if we are running with elevated privileges and should ignore env variables */ 1725/* return true if we are running with elevated privileges and should ignore env variables */
1210int inline_size 1726int inline_size ecb_cold
1211enable_secure (void) 1727enable_secure (void)
1212{ 1728{
1213#ifdef _WIN32 1729#ifdef _WIN32
1214 return 0; 1730 return 0;
1215#else 1731#else
1216 return getuid () != geteuid () 1732 return getuid () != geteuid ()
1217 || getgid () != getegid (); 1733 || getgid () != getegid ();
1218#endif 1734#endif
1219} 1735}
1220 1736
1221unsigned int 1737unsigned int ecb_cold
1222ev_supported_backends (void) 1738ev_supported_backends (void)
1223{ 1739{
1224 unsigned int flags = 0; 1740 unsigned int flags = 0;
1225 1741
1226 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 1742 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
… …
1230 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 1746 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1231 1747
1232 return flags; 1748 return flags;
1233} 1749}
1234 1750
1235unsigned int 1751unsigned int ecb_cold
1236ev_recommended_backends (void) 1752ev_recommended_backends (void)
1237{ 1753{
1238 unsigned int flags = ev_supported_backends (); 1754 unsigned int flags = ev_supported_backends ();
1239 1755
1240#ifndef __NetBSD__ 1756#ifndef __NetBSD__
1241 /* kqueue is borked on everything but netbsd apparently */ 1757 /* kqueue is borked on everything but netbsd apparently */
1242 /* it usually doesn't work correctly on anything but sockets and pipes */ 1758 /* it usually doesn't work correctly on anything but sockets and pipes */
1243 flags &= ~EVBACKEND_KQUEUE; 1759 flags &= ~EVBACKEND_KQUEUE;
1244#endif 1760#endif
1245#ifdef __APPLE__ 1761#ifdef __APPLE__
1246 // flags &= ~EVBACKEND_KQUEUE; for documentation 1762 /* only select works correctly on that "unix-certified" platform */
1247 flags &= ~EVBACKEND_POLL; 1763 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1764 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1765#endif
1766#ifdef __FreeBSD__
1767 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1248#endif 1768#endif
1249 1769
1250 return flags; 1770 return flags;
1251} 1771}
1252 1772
1253unsigned int 1773unsigned int ecb_cold
1254ev_embeddable_backends (void) 1774ev_embeddable_backends (void)
1255{ 1775{
1256 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 1776 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1257 1777
1258 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 1778 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1259 /* please fix it and tell me how to detect the fix */ 1779 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1260 flags &= ~EVBACKEND_EPOLL; 1780 flags &= ~EVBACKEND_EPOLL;
1261 1781
1262 return flags; 1782 return flags;
1263} 1783}
1264 1784
1265unsigned int 1785unsigned int
1266ev_backend (EV_P) 1786ev_backend (EV_P)
1267{ 1787{
1268 return backend; 1788 return backend;
1269} 1789}
1270 1790
1791#if EV_FEATURE_API
1271unsigned int 1792unsigned int
1272ev_loop_count (EV_P) 1793ev_iteration (EV_P)
1273{ 1794{
1274 return loop_count; 1795 return loop_count;
1796}
1797
1798unsigned int
1799ev_depth (EV_P)
1800{
1801 return loop_depth;
1275} 1802}
1276 1803
1277void 1804void
1278ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 1805ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1279{ 1806{
… …
1284ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 1811ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1285{ 1812{
1286 timeout_blocktime = interval; 1813 timeout_blocktime = interval;
1287} 1814}
1288 1815
1816void
1817ev_set_userdata (EV_P_ void *data)
1818{
1819 userdata = data;
1820}
1821
1822void *
1823ev_userdata (EV_P)
1824{
1825 return userdata;
1826}
1827
1828void
1829ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1830{
1831 invoke_cb = invoke_pending_cb;
1832}
1833
1834void
1835ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1836{
1837 release_cb = release;
1838 acquire_cb = acquire;
1839}
1840#endif
1841
1842/* initialise a loop structure, must be zero-initialised */
1289static void noinline 1843static void noinline ecb_cold
1290loop_init (EV_P_ unsigned int flags) 1844loop_init (EV_P_ unsigned int flags)
1291{ 1845{
1292 if (!backend) 1846 if (!backend)
1293 { 1847 {
1848 origflags = flags;
1849
1850#if EV_USE_REALTIME
1851 if (!have_realtime)
1852 {
1853 struct timespec ts;
1854
1855 if (!clock_gettime (CLOCK_REALTIME, &ts))
1856 have_realtime = 1;
1857 }
1858#endif
1859
1294#if EV_USE_MONOTONIC 1860#if EV_USE_MONOTONIC
1861 if (!have_monotonic)
1295 { 1862 {
1296 struct timespec ts; 1863 struct timespec ts;
1864
1297 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1865 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1298 have_monotonic = 1; 1866 have_monotonic = 1;
1299 } 1867 }
1300#endif
1301
1302 ev_rt_now = ev_time ();
1303 mn_now = get_clock ();
1304 now_floor = mn_now;
1305 rtmn_diff = ev_rt_now - mn_now;
1306
1307 io_blocktime = 0.;
1308 timeout_blocktime = 0.;
1309 backend = 0;
1310 backend_fd = -1;
1311 gotasync = 0;
1312#if EV_USE_INOTIFY
1313 fs_fd = -2;
1314#endif 1868#endif
1315 1869
1316 /* pid check not overridable via env */ 1870 /* pid check not overridable via env */
1317#ifndef _WIN32 1871#ifndef _WIN32
1318 if (flags & EVFLAG_FORKCHECK) 1872 if (flags & EVFLAG_FORKCHECK)
… …
1322 if (!(flags & EVFLAG_NOENV) 1876 if (!(flags & EVFLAG_NOENV)
1323 && !enable_secure () 1877 && !enable_secure ()
1324 && getenv ("LIBEV_FLAGS")) 1878 && getenv ("LIBEV_FLAGS"))
1325 flags = atoi (getenv ("LIBEV_FLAGS")); 1879 flags = atoi (getenv ("LIBEV_FLAGS"));
1326 1880
1327 if (!(flags & 0x0000ffffU)) 1881 ev_rt_now = ev_time ();
1882 mn_now = get_clock ();
1883 now_floor = mn_now;
1884 rtmn_diff = ev_rt_now - mn_now;
1885#if EV_FEATURE_API
1886 invoke_cb = ev_invoke_pending;
1887#endif
1888
1889 io_blocktime = 0.;
1890 timeout_blocktime = 0.;
1891 backend = 0;
1892 backend_fd = -1;
1893 sig_pending = 0;
1894#if EV_ASYNC_ENABLE
1895 async_pending = 0;
1896#endif
1897 pipe_write_skipped = 0;
1898 pipe_write_wanted = 0;
1899#if EV_USE_INOTIFY
1900 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1901#endif
1902#if EV_USE_SIGNALFD
1903 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1904#endif
1905
1906 if (!(flags & EVBACKEND_MASK))
1328 flags |= ev_recommended_backends (); 1907 flags |= ev_recommended_backends ();
1329 1908
1909#if EV_USE_IOCP
1910 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1911#endif
1330#if EV_USE_PORT 1912#if EV_USE_PORT
1331 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1913 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1332#endif 1914#endif
1333#if EV_USE_KQUEUE 1915#if EV_USE_KQUEUE
1334 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1916 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1341#endif 1923#endif
1342#if EV_USE_SELECT 1924#if EV_USE_SELECT
1343 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1925 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1344#endif 1926#endif
1345 1927
1928 ev_prepare_init (&pending_w, pendingcb);
1929
1930#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1346 ev_init (&pipeev, pipecb); 1931 ev_init (&pipe_w, pipecb);
1347 ev_set_priority (&pipeev, EV_MAXPRI); 1932 ev_set_priority (&pipe_w, EV_MAXPRI);
1933#endif
1348 } 1934 }
1349} 1935}
1350 1936
1351static void noinline 1937/* free up a loop structure */
1938void ecb_cold
1352loop_destroy (EV_P) 1939ev_loop_destroy (EV_P)
1353{ 1940{
1354 int i; 1941 int i;
1355 1942
1943#if EV_MULTIPLICITY
1944 /* mimic free (0) */
1945 if (!EV_A)
1946 return;
1947#endif
1948
1949#if EV_CLEANUP_ENABLE
1950 /* queue cleanup watchers (and execute them) */
1951 if (expect_false (cleanupcnt))
1952 {
1953 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1954 EV_INVOKE_PENDING;
1955 }
1956#endif
1957
1958#if EV_CHILD_ENABLE
1959 if (ev_is_active (&childev))
1960 {
1961 ev_ref (EV_A); /* child watcher */
1962 ev_signal_stop (EV_A_ &childev);
1963 }
1964#endif
1965
1356 if (ev_is_active (&pipeev)) 1966 if (ev_is_active (&pipe_w))
1357 { 1967 {
1358 ev_ref (EV_A); /* signal watcher */ 1968 /*ev_ref (EV_A);*/
1359 ev_io_stop (EV_A_ &pipeev); 1969 /*ev_io_stop (EV_A_ &pipe_w);*/
1360 1970
1361#if EV_USE_EVENTFD 1971#if EV_USE_EVENTFD
1362 if (evfd >= 0) 1972 if (evfd >= 0)
1363 close (evfd); 1973 close (evfd);
1364#endif 1974#endif
1365 1975
1366 if (evpipe [0] >= 0) 1976 if (evpipe [0] >= 0)
1367 { 1977 {
1368 close (evpipe [0]); 1978 EV_WIN32_CLOSE_FD (evpipe [0]);
1369 close (evpipe [1]); 1979 EV_WIN32_CLOSE_FD (evpipe [1]);
1370 } 1980 }
1371 } 1981 }
1982
1983#if EV_USE_SIGNALFD
1984 if (ev_is_active (&sigfd_w))
1985 close (sigfd);
1986#endif
1372 1987
1373#if EV_USE_INOTIFY 1988#if EV_USE_INOTIFY
1374 if (fs_fd >= 0) 1989 if (fs_fd >= 0)
1375 close (fs_fd); 1990 close (fs_fd);
1376#endif 1991#endif
1377 1992
1378 if (backend_fd >= 0) 1993 if (backend_fd >= 0)
1379 close (backend_fd); 1994 close (backend_fd);
1380 1995
1996#if EV_USE_IOCP
1997 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1998#endif
1381#if EV_USE_PORT 1999#if EV_USE_PORT
1382 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2000 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1383#endif 2001#endif
1384#if EV_USE_KQUEUE 2002#if EV_USE_KQUEUE
1385 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2003 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1400#if EV_IDLE_ENABLE 2018#if EV_IDLE_ENABLE
1401 array_free (idle, [i]); 2019 array_free (idle, [i]);
1402#endif 2020#endif
1403 } 2021 }
1404 2022
1405 ev_free (anfds); anfdmax = 0; 2023 ev_free (anfds); anfds = 0; anfdmax = 0;
1406 2024
1407 /* have to use the microsoft-never-gets-it-right macro */ 2025 /* have to use the microsoft-never-gets-it-right macro */
2026 array_free (rfeed, EMPTY);
1408 array_free (fdchange, EMPTY); 2027 array_free (fdchange, EMPTY);
1409 array_free (timer, EMPTY); 2028 array_free (timer, EMPTY);
1410#if EV_PERIODIC_ENABLE 2029#if EV_PERIODIC_ENABLE
1411 array_free (periodic, EMPTY); 2030 array_free (periodic, EMPTY);
1412#endif 2031#endif
1413#if EV_FORK_ENABLE 2032#if EV_FORK_ENABLE
1414 array_free (fork, EMPTY); 2033 array_free (fork, EMPTY);
1415#endif 2034#endif
2035#if EV_CLEANUP_ENABLE
2036 array_free (cleanup, EMPTY);
2037#endif
1416 array_free (prepare, EMPTY); 2038 array_free (prepare, EMPTY);
1417 array_free (check, EMPTY); 2039 array_free (check, EMPTY);
1418#if EV_ASYNC_ENABLE 2040#if EV_ASYNC_ENABLE
1419 array_free (async, EMPTY); 2041 array_free (async, EMPTY);
1420#endif 2042#endif
1421 2043
1422 backend = 0; 2044 backend = 0;
2045
2046#if EV_MULTIPLICITY
2047 if (ev_is_default_loop (EV_A))
2048#endif
2049 ev_default_loop_ptr = 0;
2050#if EV_MULTIPLICITY
2051 else
2052 ev_free (EV_A);
2053#endif
1423} 2054}
1424 2055
1425#if EV_USE_INOTIFY 2056#if EV_USE_INOTIFY
1426void inline_size infy_fork (EV_P); 2057inline_size void infy_fork (EV_P);
1427#endif 2058#endif
1428 2059
1429void inline_size 2060inline_size void
1430loop_fork (EV_P) 2061loop_fork (EV_P)
1431{ 2062{
1432#if EV_USE_PORT 2063#if EV_USE_PORT
1433 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2064 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1434#endif 2065#endif
… …
1440#endif 2071#endif
1441#if EV_USE_INOTIFY 2072#if EV_USE_INOTIFY
1442 infy_fork (EV_A); 2073 infy_fork (EV_A);
1443#endif 2074#endif
1444 2075
1445 if (ev_is_active (&pipeev)) 2076 if (ev_is_active (&pipe_w))
1446 { 2077 {
1447 /* this "locks" the handlers against writing to the pipe */ 2078 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1448 /* while we modify the fd vars */
1449 gotsig = 1;
1450#if EV_ASYNC_ENABLE
1451 gotasync = 1;
1452#endif
1453 2079
1454 ev_ref (EV_A); 2080 ev_ref (EV_A);
1455 ev_io_stop (EV_A_ &pipeev); 2081 ev_io_stop (EV_A_ &pipe_w);
1456 2082
1457#if EV_USE_EVENTFD 2083#if EV_USE_EVENTFD
1458 if (evfd >= 0) 2084 if (evfd >= 0)
1459 close (evfd); 2085 close (evfd);
1460#endif 2086#endif
1461 2087
1462 if (evpipe [0] >= 0) 2088 if (evpipe [0] >= 0)
1463 { 2089 {
1464 close (evpipe [0]); 2090 EV_WIN32_CLOSE_FD (evpipe [0]);
1465 close (evpipe [1]); 2091 EV_WIN32_CLOSE_FD (evpipe [1]);
1466 } 2092 }
1467 2093
2094#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1468 evpipe_init (EV_A); 2095 evpipe_init (EV_A);
1469 /* now iterate over everything, in case we missed something */ 2096 /* now iterate over everything, in case we missed something */
1470 pipecb (EV_A_ &pipeev, EV_READ); 2097 pipecb (EV_A_ &pipe_w, EV_READ);
2098#endif
1471 } 2099 }
1472 2100
1473 postfork = 0; 2101 postfork = 0;
1474} 2102}
1475 2103
1476#if EV_MULTIPLICITY 2104#if EV_MULTIPLICITY
1477 2105
1478struct ev_loop * 2106struct ev_loop * ecb_cold
1479ev_loop_new (unsigned int flags) 2107ev_loop_new (unsigned int flags)
1480{ 2108{
1481 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2109 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1482 2110
1483 memset (loop, 0, sizeof (struct ev_loop)); 2111 memset (EV_A, 0, sizeof (struct ev_loop));
1484
1485 loop_init (EV_A_ flags); 2112 loop_init (EV_A_ flags);
1486 2113
1487 if (ev_backend (EV_A)) 2114 if (ev_backend (EV_A))
1488 return loop; 2115 return EV_A;
1489 2116
2117 ev_free (EV_A);
1490 return 0; 2118 return 0;
1491} 2119}
1492 2120
1493void 2121#endif /* multiplicity */
1494ev_loop_destroy (EV_P)
1495{
1496 loop_destroy (EV_A);
1497 ev_free (loop);
1498}
1499
1500void
1501ev_loop_fork (EV_P)
1502{
1503 postfork = 1; /* must be in line with ev_default_fork */
1504}
1505 2122
1506#if EV_VERIFY 2123#if EV_VERIFY
1507static void noinline 2124static void noinline ecb_cold
1508verify_watcher (EV_P_ W w) 2125verify_watcher (EV_P_ W w)
1509{ 2126{
1510 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2127 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1511 2128
1512 if (w->pending) 2129 if (w->pending)
1513 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2130 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1514} 2131}
1515 2132
1516static void noinline 2133static void noinline ecb_cold
1517verify_heap (EV_P_ ANHE *heap, int N) 2134verify_heap (EV_P_ ANHE *heap, int N)
1518{ 2135{
1519 int i; 2136 int i;
1520 2137
1521 for (i = HEAP0; i < N + HEAP0; ++i) 2138 for (i = HEAP0; i < N + HEAP0; ++i)
1522 { 2139 {
1523 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i)); 2140 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1524 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i]))); 2141 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1525 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i])))); 2142 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1526 2143
1527 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2144 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1528 } 2145 }
1529} 2146}
1530 2147
1531static void noinline 2148static void noinline ecb_cold
1532array_verify (EV_P_ W *ws, int cnt) 2149array_verify (EV_P_ W *ws, int cnt)
1533{ 2150{
1534 while (cnt--) 2151 while (cnt--)
1535 { 2152 {
1536 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2153 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1537 verify_watcher (EV_A_ ws [cnt]); 2154 verify_watcher (EV_A_ ws [cnt]);
1538 } 2155 }
1539} 2156}
1540#endif 2157#endif
1541 2158
1542void 2159#if EV_FEATURE_API
2160void ecb_cold
1543ev_loop_verify (EV_P) 2161ev_verify (EV_P)
1544{ 2162{
1545#if EV_VERIFY 2163#if EV_VERIFY
1546 int i; 2164 int i;
1547 WL w; 2165 WL w;
1548 2166
1549 assert (activecnt >= -1); 2167 assert (activecnt >= -1);
1550 2168
1551 assert (fdchangemax >= fdchangecnt); 2169 assert (fdchangemax >= fdchangecnt);
1552 for (i = 0; i < fdchangecnt; ++i) 2170 for (i = 0; i < fdchangecnt; ++i)
1553 assert (("negative fd in fdchanges", fdchanges [i] >= 0)); 2171 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1554 2172
1555 assert (anfdmax >= 0); 2173 assert (anfdmax >= 0);
1556 for (i = 0; i < anfdmax; ++i) 2174 for (i = 0; i < anfdmax; ++i)
1557 for (w = anfds [i].head; w; w = w->next) 2175 for (w = anfds [i].head; w; w = w->next)
1558 { 2176 {
1559 verify_watcher (EV_A_ (W)w); 2177 verify_watcher (EV_A_ (W)w);
1560 assert (("inactive fd watcher on anfd list", ev_active (w) == 1)); 2178 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1561 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 2179 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1562 } 2180 }
1563 2181
1564 assert (timermax >= timercnt); 2182 assert (timermax >= timercnt);
1565 verify_heap (EV_A_ timers, timercnt); 2183 verify_heap (EV_A_ timers, timercnt);
1566 2184
… …
1582#if EV_FORK_ENABLE 2200#if EV_FORK_ENABLE
1583 assert (forkmax >= forkcnt); 2201 assert (forkmax >= forkcnt);
1584 array_verify (EV_A_ (W *)forks, forkcnt); 2202 array_verify (EV_A_ (W *)forks, forkcnt);
1585#endif 2203#endif
1586 2204
2205#if EV_CLEANUP_ENABLE
2206 assert (cleanupmax >= cleanupcnt);
2207 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2208#endif
2209
1587#if EV_ASYNC_ENABLE 2210#if EV_ASYNC_ENABLE
1588 assert (asyncmax >= asynccnt); 2211 assert (asyncmax >= asynccnt);
1589 array_verify (EV_A_ (W *)asyncs, asynccnt); 2212 array_verify (EV_A_ (W *)asyncs, asynccnt);
1590#endif 2213#endif
1591 2214
2215#if EV_PREPARE_ENABLE
1592 assert (preparemax >= preparecnt); 2216 assert (preparemax >= preparecnt);
1593 array_verify (EV_A_ (W *)prepares, preparecnt); 2217 array_verify (EV_A_ (W *)prepares, preparecnt);
2218#endif
1594 2219
2220#if EV_CHECK_ENABLE
1595 assert (checkmax >= checkcnt); 2221 assert (checkmax >= checkcnt);
1596 array_verify (EV_A_ (W *)checks, checkcnt); 2222 array_verify (EV_A_ (W *)checks, checkcnt);
2223#endif
1597 2224
1598# if 0 2225# if 0
2226#if EV_CHILD_ENABLE
1599 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2227 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1600 for (signum = signalmax; signum--; ) if (signals [signum].gotsig) 2228 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2229#endif
1601# endif 2230# endif
1602#endif 2231#endif
1603} 2232}
1604 2233#endif
1605#endif /* multiplicity */
1606 2234
1607#if EV_MULTIPLICITY 2235#if EV_MULTIPLICITY
1608struct ev_loop * 2236struct ev_loop * ecb_cold
1609ev_default_loop_init (unsigned int flags)
1610#else 2237#else
1611int 2238int
2239#endif
1612ev_default_loop (unsigned int flags) 2240ev_default_loop (unsigned int flags)
1613#endif
1614{ 2241{
1615 if (!ev_default_loop_ptr) 2242 if (!ev_default_loop_ptr)
1616 { 2243 {
1617#if EV_MULTIPLICITY 2244#if EV_MULTIPLICITY
1618 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2245 EV_P = ev_default_loop_ptr = &default_loop_struct;
1619#else 2246#else
1620 ev_default_loop_ptr = 1; 2247 ev_default_loop_ptr = 1;
1621#endif 2248#endif
1622 2249
1623 loop_init (EV_A_ flags); 2250 loop_init (EV_A_ flags);
1624 2251
1625 if (ev_backend (EV_A)) 2252 if (ev_backend (EV_A))
1626 { 2253 {
1627#ifndef _WIN32 2254#if EV_CHILD_ENABLE
1628 ev_signal_init (&childev, childcb, SIGCHLD); 2255 ev_signal_init (&childev, childcb, SIGCHLD);
1629 ev_set_priority (&childev, EV_MAXPRI); 2256 ev_set_priority (&childev, EV_MAXPRI);
1630 ev_signal_start (EV_A_ &childev); 2257 ev_signal_start (EV_A_ &childev);
1631 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2258 ev_unref (EV_A); /* child watcher should not keep loop alive */
1632#endif 2259#endif
… …
1637 2264
1638 return ev_default_loop_ptr; 2265 return ev_default_loop_ptr;
1639} 2266}
1640 2267
1641void 2268void
1642ev_default_destroy (void) 2269ev_loop_fork (EV_P)
1643{ 2270{
1644#if EV_MULTIPLICITY
1645 struct ev_loop *loop = ev_default_loop_ptr;
1646#endif
1647
1648 ev_default_loop_ptr = 0;
1649
1650#ifndef _WIN32
1651 ev_ref (EV_A); /* child watcher */
1652 ev_signal_stop (EV_A_ &childev);
1653#endif
1654
1655 loop_destroy (EV_A);
1656}
1657
1658void
1659ev_default_fork (void)
1660{
1661#if EV_MULTIPLICITY
1662 struct ev_loop *loop = ev_default_loop_ptr;
1663#endif
1664
1665 postfork = 1; /* must be in line with ev_loop_fork */ 2271 postfork = 1; /* must be in line with ev_default_fork */
1666} 2272}
1667 2273
1668/*****************************************************************************/ 2274/*****************************************************************************/
1669 2275
1670void 2276void
1671ev_invoke (EV_P_ void *w, int revents) 2277ev_invoke (EV_P_ void *w, int revents)
1672{ 2278{
1673 EV_CB_INVOKE ((W)w, revents); 2279 EV_CB_INVOKE ((W)w, revents);
1674} 2280}
1675 2281
1676void inline_speed 2282unsigned int
1677call_pending (EV_P) 2283ev_pending_count (EV_P)
2284{
2285 int pri;
2286 unsigned int count = 0;
2287
2288 for (pri = NUMPRI; pri--; )
2289 count += pendingcnt [pri];
2290
2291 return count;
2292}
2293
2294void noinline
2295ev_invoke_pending (EV_P)
1678{ 2296{
1679 int pri; 2297 int pri;
1680 2298
1681 for (pri = NUMPRI; pri--; ) 2299 for (pri = NUMPRI; pri--; )
1682 while (pendingcnt [pri]) 2300 while (pendingcnt [pri])
1683 { 2301 {
1684 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2302 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1685 2303
1686 if (expect_true (p->w))
1687 {
1688 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1689
1690 p->w->pending = 0; 2304 p->w->pending = 0;
1691 EV_CB_INVOKE (p->w, p->events); 2305 EV_CB_INVOKE (p->w, p->events);
1692 EV_FREQUENT_CHECK; 2306 EV_FREQUENT_CHECK;
1693 }
1694 } 2307 }
1695} 2308}
1696 2309
1697#if EV_IDLE_ENABLE 2310#if EV_IDLE_ENABLE
1698void inline_size 2311/* make idle watchers pending. this handles the "call-idle */
2312/* only when higher priorities are idle" logic */
2313inline_size void
1699idle_reify (EV_P) 2314idle_reify (EV_P)
1700{ 2315{
1701 if (expect_false (idleall)) 2316 if (expect_false (idleall))
1702 { 2317 {
1703 int pri; 2318 int pri;
… …
1715 } 2330 }
1716 } 2331 }
1717} 2332}
1718#endif 2333#endif
1719 2334
1720void inline_size 2335/* make timers pending */
2336inline_size void
1721timers_reify (EV_P) 2337timers_reify (EV_P)
1722{ 2338{
1723 EV_FREQUENT_CHECK; 2339 EV_FREQUENT_CHECK;
1724 2340
1725 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now) 2341 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1726 { 2342 {
1727 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]); 2343 do
1728
1729 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1730
1731 /* first reschedule or stop timer */
1732 if (w->repeat)
1733 { 2344 {
2345 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2346
2347 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2348
2349 /* first reschedule or stop timer */
2350 if (w->repeat)
2351 {
1734 ev_at (w) += w->repeat; 2352 ev_at (w) += w->repeat;
1735 if (ev_at (w) < mn_now) 2353 if (ev_at (w) < mn_now)
1736 ev_at (w) = mn_now; 2354 ev_at (w) = mn_now;
1737 2355
1738 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2356 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1739 2357
1740 ANHE_at_cache (timers [HEAP0]); 2358 ANHE_at_cache (timers [HEAP0]);
1741 downheap (timers, timercnt, HEAP0); 2359 downheap (timers, timercnt, HEAP0);
2360 }
2361 else
2362 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2363
2364 EV_FREQUENT_CHECK;
2365 feed_reverse (EV_A_ (W)w);
1742 } 2366 }
1743 else 2367 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1744 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1745 2368
1746 EV_FREQUENT_CHECK; 2369 feed_reverse_done (EV_A_ EV_TIMER);
1747 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1748 } 2370 }
1749} 2371}
1750 2372
1751#if EV_PERIODIC_ENABLE 2373#if EV_PERIODIC_ENABLE
1752void inline_size 2374
2375static void noinline
2376periodic_recalc (EV_P_ ev_periodic *w)
2377{
2378 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2379 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2380
2381 /* the above almost always errs on the low side */
2382 while (at <= ev_rt_now)
2383 {
2384 ev_tstamp nat = at + w->interval;
2385
2386 /* when resolution fails us, we use ev_rt_now */
2387 if (expect_false (nat == at))
2388 {
2389 at = ev_rt_now;
2390 break;
2391 }
2392
2393 at = nat;
2394 }
2395
2396 ev_at (w) = at;
2397}
2398
2399/* make periodics pending */
2400inline_size void
1753periodics_reify (EV_P) 2401periodics_reify (EV_P)
1754{ 2402{
1755 EV_FREQUENT_CHECK; 2403 EV_FREQUENT_CHECK;
1756 2404
1757 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 2405 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1758 { 2406 {
1759 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 2407 int feed_count = 0;
1760 2408
1761 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/ 2409 do
1762
1763 /* first reschedule or stop timer */
1764 if (w->reschedule_cb)
1765 { 2410 {
2411 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2412
2413 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2414
2415 /* first reschedule or stop timer */
2416 if (w->reschedule_cb)
2417 {
1766 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2418 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1767 2419
1768 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now)); 2420 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1769 2421
1770 ANHE_at_cache (periodics [HEAP0]); 2422 ANHE_at_cache (periodics [HEAP0]);
1771 downheap (periodics, periodiccnt, HEAP0); 2423 downheap (periodics, periodiccnt, HEAP0);
2424 }
2425 else if (w->interval)
2426 {
2427 periodic_recalc (EV_A_ w);
2428 ANHE_at_cache (periodics [HEAP0]);
2429 downheap (periodics, periodiccnt, HEAP0);
2430 }
2431 else
2432 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2433
2434 EV_FREQUENT_CHECK;
2435 feed_reverse (EV_A_ (W)w);
1772 } 2436 }
1773 else if (w->interval) 2437 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1774 {
1775 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1776 /* if next trigger time is not sufficiently in the future, put it there */
1777 /* this might happen because of floating point inexactness */
1778 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1779 {
1780 ev_at (w) += w->interval;
1781 2438
1782 /* if interval is unreasonably low we might still have a time in the past */
1783 /* so correct this. this will make the periodic very inexact, but the user */
1784 /* has effectively asked to get triggered more often than possible */
1785 if (ev_at (w) < ev_rt_now)
1786 ev_at (w) = ev_rt_now;
1787 }
1788
1789 ANHE_at_cache (periodics [HEAP0]);
1790 downheap (periodics, periodiccnt, HEAP0);
1791 }
1792 else
1793 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1794
1795 EV_FREQUENT_CHECK;
1796 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 2439 feed_reverse_done (EV_A_ EV_PERIODIC);
1797 } 2440 }
1798} 2441}
1799 2442
2443/* simply recalculate all periodics */
2444/* TODO: maybe ensure that at least one event happens when jumping forward? */
1800static void noinline 2445static void noinline ecb_cold
1801periodics_reschedule (EV_P) 2446periodics_reschedule (EV_P)
1802{ 2447{
1803 int i; 2448 int i;
1804 2449
1805 /* adjust periodics after time jump */ 2450 /* adjust periodics after time jump */
… …
1808 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 2453 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1809 2454
1810 if (w->reschedule_cb) 2455 if (w->reschedule_cb)
1811 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2456 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1812 else if (w->interval) 2457 else if (w->interval)
1813 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2458 periodic_recalc (EV_A_ w);
1814 2459
1815 ANHE_at_cache (periodics [i]); 2460 ANHE_at_cache (periodics [i]);
1816 } 2461 }
1817 2462
1818 reheap (periodics, periodiccnt); 2463 reheap (periodics, periodiccnt);
1819} 2464}
1820#endif 2465#endif
1821 2466
1822void inline_speed 2467/* adjust all timers by a given offset */
2468static void noinline ecb_cold
2469timers_reschedule (EV_P_ ev_tstamp adjust)
2470{
2471 int i;
2472
2473 for (i = 0; i < timercnt; ++i)
2474 {
2475 ANHE *he = timers + i + HEAP0;
2476 ANHE_w (*he)->at += adjust;
2477 ANHE_at_cache (*he);
2478 }
2479}
2480
2481/* fetch new monotonic and realtime times from the kernel */
2482/* also detect if there was a timejump, and act accordingly */
2483inline_speed void
1823time_update (EV_P_ ev_tstamp max_block) 2484time_update (EV_P_ ev_tstamp max_block)
1824{ 2485{
1825 int i;
1826
1827#if EV_USE_MONOTONIC 2486#if EV_USE_MONOTONIC
1828 if (expect_true (have_monotonic)) 2487 if (expect_true (have_monotonic))
1829 { 2488 {
2489 int i;
1830 ev_tstamp odiff = rtmn_diff; 2490 ev_tstamp odiff = rtmn_diff;
1831 2491
1832 mn_now = get_clock (); 2492 mn_now = get_clock ();
1833 2493
1834 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 2494 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1850 * doesn't hurt either as we only do this on time-jumps or 2510 * doesn't hurt either as we only do this on time-jumps or
1851 * in the unlikely event of having been preempted here. 2511 * in the unlikely event of having been preempted here.
1852 */ 2512 */
1853 for (i = 4; --i; ) 2513 for (i = 4; --i; )
1854 { 2514 {
2515 ev_tstamp diff;
1855 rtmn_diff = ev_rt_now - mn_now; 2516 rtmn_diff = ev_rt_now - mn_now;
1856 2517
2518 diff = odiff - rtmn_diff;
2519
1857 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 2520 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1858 return; /* all is well */ 2521 return; /* all is well */
1859 2522
1860 ev_rt_now = ev_time (); 2523 ev_rt_now = ev_time ();
1861 mn_now = get_clock (); 2524 mn_now = get_clock ();
1862 now_floor = mn_now; 2525 now_floor = mn_now;
1863 } 2526 }
1864 2527
2528 /* no timer adjustment, as the monotonic clock doesn't jump */
2529 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1865# if EV_PERIODIC_ENABLE 2530# if EV_PERIODIC_ENABLE
1866 periodics_reschedule (EV_A); 2531 periodics_reschedule (EV_A);
1867# endif 2532# endif
1868 /* no timer adjustment, as the monotonic clock doesn't jump */
1869 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1870 } 2533 }
1871 else 2534 else
1872#endif 2535#endif
1873 { 2536 {
1874 ev_rt_now = ev_time (); 2537 ev_rt_now = ev_time ();
1875 2538
1876 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 2539 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1877 { 2540 {
2541 /* adjust timers. this is easy, as the offset is the same for all of them */
2542 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1878#if EV_PERIODIC_ENABLE 2543#if EV_PERIODIC_ENABLE
1879 periodics_reschedule (EV_A); 2544 periodics_reschedule (EV_A);
1880#endif 2545#endif
1881 /* adjust timers. this is easy, as the offset is the same for all of them */
1882 for (i = 0; i < timercnt; ++i)
1883 {
1884 ANHE *he = timers + i + HEAP0;
1885 ANHE_w (*he)->at += ev_rt_now - mn_now;
1886 ANHE_at_cache (*he);
1887 }
1888 } 2546 }
1889 2547
1890 mn_now = ev_rt_now; 2548 mn_now = ev_rt_now;
1891 } 2549 }
1892} 2550}
1893 2551
1894void 2552void
1895ev_ref (EV_P)
1896{
1897 ++activecnt;
1898}
1899
1900void
1901ev_unref (EV_P)
1902{
1903 --activecnt;
1904}
1905
1906void
1907ev_now_update (EV_P)
1908{
1909 time_update (EV_A_ 1e100);
1910}
1911
1912static int loop_done;
1913
1914void
1915ev_loop (EV_P_ int flags) 2553ev_run (EV_P_ int flags)
1916{ 2554{
2555#if EV_FEATURE_API
2556 ++loop_depth;
2557#endif
2558
2559 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2560
1917 loop_done = EVUNLOOP_CANCEL; 2561 loop_done = EVBREAK_CANCEL;
1918 2562
1919 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2563 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1920 2564
1921 do 2565 do
1922 { 2566 {
1923#if EV_VERIFY >= 2 2567#if EV_VERIFY >= 2
1924 ev_loop_verify (EV_A); 2568 ev_verify (EV_A);
1925#endif 2569#endif
1926 2570
1927#ifndef _WIN32 2571#ifndef _WIN32
1928 if (expect_false (curpid)) /* penalise the forking check even more */ 2572 if (expect_false (curpid)) /* penalise the forking check even more */
1929 if (expect_false (getpid () != curpid)) 2573 if (expect_false (getpid () != curpid))
… …
1937 /* we might have forked, so queue fork handlers */ 2581 /* we might have forked, so queue fork handlers */
1938 if (expect_false (postfork)) 2582 if (expect_false (postfork))
1939 if (forkcnt) 2583 if (forkcnt)
1940 { 2584 {
1941 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2585 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1942 call_pending (EV_A); 2586 EV_INVOKE_PENDING;
1943 } 2587 }
1944#endif 2588#endif
1945 2589
2590#if EV_PREPARE_ENABLE
1946 /* queue prepare watchers (and execute them) */ 2591 /* queue prepare watchers (and execute them) */
1947 if (expect_false (preparecnt)) 2592 if (expect_false (preparecnt))
1948 { 2593 {
1949 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2594 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1950 call_pending (EV_A); 2595 EV_INVOKE_PENDING;
1951 } 2596 }
2597#endif
1952 2598
1953 if (expect_false (!activecnt)) 2599 if (expect_false (loop_done))
1954 break; 2600 break;
1955 2601
1956 /* we might have forked, so reify kernel state if necessary */ 2602 /* we might have forked, so reify kernel state if necessary */
1957 if (expect_false (postfork)) 2603 if (expect_false (postfork))
1958 loop_fork (EV_A); 2604 loop_fork (EV_A);
… …
1963 /* calculate blocking time */ 2609 /* calculate blocking time */
1964 { 2610 {
1965 ev_tstamp waittime = 0.; 2611 ev_tstamp waittime = 0.;
1966 ev_tstamp sleeptime = 0.; 2612 ev_tstamp sleeptime = 0.;
1967 2613
2614 /* remember old timestamp for io_blocktime calculation */
2615 ev_tstamp prev_mn_now = mn_now;
2616
2617 /* update time to cancel out callback processing overhead */
2618 time_update (EV_A_ 1e100);
2619
2620 /* from now on, we want a pipe-wake-up */
2621 pipe_write_wanted = 1;
2622
2623 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
2624
1968 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 2625 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1969 { 2626 {
1970 /* update time to cancel out callback processing overhead */
1971 time_update (EV_A_ 1e100);
1972
1973 waittime = MAX_BLOCKTIME; 2627 waittime = MAX_BLOCKTIME;
1974 2628
1975 if (timercnt) 2629 if (timercnt)
1976 { 2630 {
1977 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 2631 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1978 if (waittime > to) waittime = to; 2632 if (waittime > to) waittime = to;
1979 } 2633 }
1980 2634
1981#if EV_PERIODIC_ENABLE 2635#if EV_PERIODIC_ENABLE
1982 if (periodiccnt) 2636 if (periodiccnt)
1983 { 2637 {
1984 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 2638 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1985 if (waittime > to) waittime = to; 2639 if (waittime > to) waittime = to;
1986 } 2640 }
1987#endif 2641#endif
1988 2642
2643 /* don't let timeouts decrease the waittime below timeout_blocktime */
1989 if (expect_false (waittime < timeout_blocktime)) 2644 if (expect_false (waittime < timeout_blocktime))
1990 waittime = timeout_blocktime; 2645 waittime = timeout_blocktime;
1991 2646
1992 sleeptime = waittime - backend_fudge; 2647 /* at this point, we NEED to wait, so we have to ensure */
2648 /* to pass a minimum nonzero value to the backend */
2649 if (expect_false (waittime < backend_mintime))
2650 waittime = backend_mintime;
1993 2651
2652 /* extra check because io_blocktime is commonly 0 */
1994 if (expect_true (sleeptime > io_blocktime)) 2653 if (expect_false (io_blocktime))
1995 sleeptime = io_blocktime;
1996
1997 if (sleeptime)
1998 { 2654 {
2655 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2656
2657 if (sleeptime > waittime - backend_mintime)
2658 sleeptime = waittime - backend_mintime;
2659
2660 if (expect_true (sleeptime > 0.))
2661 {
1999 ev_sleep (sleeptime); 2662 ev_sleep (sleeptime);
2000 waittime -= sleeptime; 2663 waittime -= sleeptime;
2664 }
2001 } 2665 }
2002 } 2666 }
2003 2667
2668#if EV_FEATURE_API
2004 ++loop_count; 2669 ++loop_count;
2670#endif
2671 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2005 backend_poll (EV_A_ waittime); 2672 backend_poll (EV_A_ waittime);
2673 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2674
2675 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
2676
2677 if (pipe_write_skipped)
2678 {
2679 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2680 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2681 }
2682
2006 2683
2007 /* update ev_rt_now, do magic */ 2684 /* update ev_rt_now, do magic */
2008 time_update (EV_A_ waittime + sleeptime); 2685 time_update (EV_A_ waittime + sleeptime);
2009 } 2686 }
2010 2687
… …
2017#if EV_IDLE_ENABLE 2694#if EV_IDLE_ENABLE
2018 /* queue idle watchers unless other events are pending */ 2695 /* queue idle watchers unless other events are pending */
2019 idle_reify (EV_A); 2696 idle_reify (EV_A);
2020#endif 2697#endif
2021 2698
2699#if EV_CHECK_ENABLE
2022 /* queue check watchers, to be executed first */ 2700 /* queue check watchers, to be executed first */
2023 if (expect_false (checkcnt)) 2701 if (expect_false (checkcnt))
2024 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2702 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2703#endif
2025 2704
2026 call_pending (EV_A); 2705 EV_INVOKE_PENDING;
2027 } 2706 }
2028 while (expect_true ( 2707 while (expect_true (
2029 activecnt 2708 activecnt
2030 && !loop_done 2709 && !loop_done
2031 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 2710 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2032 )); 2711 ));
2033 2712
2034 if (loop_done == EVUNLOOP_ONE) 2713 if (loop_done == EVBREAK_ONE)
2035 loop_done = EVUNLOOP_CANCEL; 2714 loop_done = EVBREAK_CANCEL;
2715
2716#if EV_FEATURE_API
2717 --loop_depth;
2718#endif
2036} 2719}
2037 2720
2038void 2721void
2039ev_unloop (EV_P_ int how) 2722ev_break (EV_P_ int how)
2040{ 2723{
2041 loop_done = how; 2724 loop_done = how;
2042} 2725}
2043 2726
2727void
2728ev_ref (EV_P)
2729{
2730 ++activecnt;
2731}
2732
2733void
2734ev_unref (EV_P)
2735{
2736 --activecnt;
2737}
2738
2739void
2740ev_now_update (EV_P)
2741{
2742 time_update (EV_A_ 1e100);
2743}
2744
2745void
2746ev_suspend (EV_P)
2747{
2748 ev_now_update (EV_A);
2749}
2750
2751void
2752ev_resume (EV_P)
2753{
2754 ev_tstamp mn_prev = mn_now;
2755
2756 ev_now_update (EV_A);
2757 timers_reschedule (EV_A_ mn_now - mn_prev);
2758#if EV_PERIODIC_ENABLE
2759 /* TODO: really do this? */
2760 periodics_reschedule (EV_A);
2761#endif
2762}
2763
2044/*****************************************************************************/ 2764/*****************************************************************************/
2765/* singly-linked list management, used when the expected list length is short */
2045 2766
2046void inline_size 2767inline_size void
2047wlist_add (WL *head, WL elem) 2768wlist_add (WL *head, WL elem)
2048{ 2769{
2049 elem->next = *head; 2770 elem->next = *head;
2050 *head = elem; 2771 *head = elem;
2051} 2772}
2052 2773
2053void inline_size 2774inline_size void
2054wlist_del (WL *head, WL elem) 2775wlist_del (WL *head, WL elem)
2055{ 2776{
2056 while (*head) 2777 while (*head)
2057 { 2778 {
2058 if (*head == elem) 2779 if (expect_true (*head == elem))
2059 { 2780 {
2060 *head = elem->next; 2781 *head = elem->next;
2061 return; 2782 break;
2062 } 2783 }
2063 2784
2064 head = &(*head)->next; 2785 head = &(*head)->next;
2065 } 2786 }
2066} 2787}
2067 2788
2068void inline_speed 2789/* internal, faster, version of ev_clear_pending */
2790inline_speed void
2069clear_pending (EV_P_ W w) 2791clear_pending (EV_P_ W w)
2070{ 2792{
2071 if (w->pending) 2793 if (w->pending)
2072 { 2794 {
2073 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2795 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2074 w->pending = 0; 2796 w->pending = 0;
2075 } 2797 }
2076} 2798}
2077 2799
2078int 2800int
… …
2082 int pending = w_->pending; 2804 int pending = w_->pending;
2083 2805
2084 if (expect_true (pending)) 2806 if (expect_true (pending))
2085 { 2807 {
2086 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 2808 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2809 p->w = (W)&pending_w;
2087 w_->pending = 0; 2810 w_->pending = 0;
2088 p->w = 0;
2089 return p->events; 2811 return p->events;
2090 } 2812 }
2091 else 2813 else
2092 return 0; 2814 return 0;
2093} 2815}
2094 2816
2095void inline_size 2817inline_size void
2096pri_adjust (EV_P_ W w) 2818pri_adjust (EV_P_ W w)
2097{ 2819{
2098 int pri = w->priority; 2820 int pri = ev_priority (w);
2099 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 2821 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2100 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 2822 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2101 w->priority = pri; 2823 ev_set_priority (w, pri);
2102} 2824}
2103 2825
2104void inline_speed 2826inline_speed void
2105ev_start (EV_P_ W w, int active) 2827ev_start (EV_P_ W w, int active)
2106{ 2828{
2107 pri_adjust (EV_A_ w); 2829 pri_adjust (EV_A_ w);
2108 w->active = active; 2830 w->active = active;
2109 ev_ref (EV_A); 2831 ev_ref (EV_A);
2110} 2832}
2111 2833
2112void inline_size 2834inline_size void
2113ev_stop (EV_P_ W w) 2835ev_stop (EV_P_ W w)
2114{ 2836{
2115 ev_unref (EV_A); 2837 ev_unref (EV_A);
2116 w->active = 0; 2838 w->active = 0;
2117} 2839}
… …
2124 int fd = w->fd; 2846 int fd = w->fd;
2125 2847
2126 if (expect_false (ev_is_active (w))) 2848 if (expect_false (ev_is_active (w)))
2127 return; 2849 return;
2128 2850
2129 assert (("ev_io_start called with negative fd", fd >= 0)); 2851 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2130 assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE)))); 2852 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2131 2853
2132 EV_FREQUENT_CHECK; 2854 EV_FREQUENT_CHECK;
2133 2855
2134 ev_start (EV_A_ (W)w, 1); 2856 ev_start (EV_A_ (W)w, 1);
2135 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 2857 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2136 wlist_add (&anfds[fd].head, (WL)w); 2858 wlist_add (&anfds[fd].head, (WL)w);
2137 2859
2138 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 2860 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2139 w->events &= ~EV_IOFDSET; 2861 w->events &= ~EV__IOFDSET;
2140 2862
2141 EV_FREQUENT_CHECK; 2863 EV_FREQUENT_CHECK;
2142} 2864}
2143 2865
2144void noinline 2866void noinline
… …
2146{ 2868{
2147 clear_pending (EV_A_ (W)w); 2869 clear_pending (EV_A_ (W)w);
2148 if (expect_false (!ev_is_active (w))) 2870 if (expect_false (!ev_is_active (w)))
2149 return; 2871 return;
2150 2872
2151 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2873 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2152 2874
2153 EV_FREQUENT_CHECK; 2875 EV_FREQUENT_CHECK;
2154 2876
2155 wlist_del (&anfds[w->fd].head, (WL)w); 2877 wlist_del (&anfds[w->fd].head, (WL)w);
2156 ev_stop (EV_A_ (W)w); 2878 ev_stop (EV_A_ (W)w);
2157 2879
2158 fd_change (EV_A_ w->fd, 1); 2880 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2159 2881
2160 EV_FREQUENT_CHECK; 2882 EV_FREQUENT_CHECK;
2161} 2883}
2162 2884
2163void noinline 2885void noinline
… …
2166 if (expect_false (ev_is_active (w))) 2888 if (expect_false (ev_is_active (w)))
2167 return; 2889 return;
2168 2890
2169 ev_at (w) += mn_now; 2891 ev_at (w) += mn_now;
2170 2892
2171 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2893 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2172 2894
2173 EV_FREQUENT_CHECK; 2895 EV_FREQUENT_CHECK;
2174 2896
2175 ++timercnt; 2897 ++timercnt;
2176 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 2898 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
… …
2179 ANHE_at_cache (timers [ev_active (w)]); 2901 ANHE_at_cache (timers [ev_active (w)]);
2180 upheap (timers, ev_active (w)); 2902 upheap (timers, ev_active (w));
2181 2903
2182 EV_FREQUENT_CHECK; 2904 EV_FREQUENT_CHECK;
2183 2905
2184 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 2906 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2185} 2907}
2186 2908
2187void noinline 2909void noinline
2188ev_timer_stop (EV_P_ ev_timer *w) 2910ev_timer_stop (EV_P_ ev_timer *w)
2189{ 2911{
… …
2194 EV_FREQUENT_CHECK; 2916 EV_FREQUENT_CHECK;
2195 2917
2196 { 2918 {
2197 int active = ev_active (w); 2919 int active = ev_active (w);
2198 2920
2199 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); 2921 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2200 2922
2201 --timercnt; 2923 --timercnt;
2202 2924
2203 if (expect_true (active < timercnt + HEAP0)) 2925 if (expect_true (active < timercnt + HEAP0))
2204 { 2926 {
2205 timers [active] = timers [timercnt + HEAP0]; 2927 timers [active] = timers [timercnt + HEAP0];
2206 adjustheap (timers, timercnt, active); 2928 adjustheap (timers, timercnt, active);
2207 } 2929 }
2208 } 2930 }
2209 2931
2210 EV_FREQUENT_CHECK;
2211
2212 ev_at (w) -= mn_now; 2932 ev_at (w) -= mn_now;
2213 2933
2214 ev_stop (EV_A_ (W)w); 2934 ev_stop (EV_A_ (W)w);
2935
2936 EV_FREQUENT_CHECK;
2215} 2937}
2216 2938
2217void noinline 2939void noinline
2218ev_timer_again (EV_P_ ev_timer *w) 2940ev_timer_again (EV_P_ ev_timer *w)
2219{ 2941{
… …
2237 } 2959 }
2238 2960
2239 EV_FREQUENT_CHECK; 2961 EV_FREQUENT_CHECK;
2240} 2962}
2241 2963
2964ev_tstamp
2965ev_timer_remaining (EV_P_ ev_timer *w)
2966{
2967 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2968}
2969
2242#if EV_PERIODIC_ENABLE 2970#if EV_PERIODIC_ENABLE
2243void noinline 2971void noinline
2244ev_periodic_start (EV_P_ ev_periodic *w) 2972ev_periodic_start (EV_P_ ev_periodic *w)
2245{ 2973{
2246 if (expect_false (ev_is_active (w))) 2974 if (expect_false (ev_is_active (w)))
… …
2248 2976
2249 if (w->reschedule_cb) 2977 if (w->reschedule_cb)
2250 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2978 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2251 else if (w->interval) 2979 else if (w->interval)
2252 { 2980 {
2253 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2981 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2254 /* this formula differs from the one in periodic_reify because we do not always round up */ 2982 periodic_recalc (EV_A_ w);
2255 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2256 } 2983 }
2257 else 2984 else
2258 ev_at (w) = w->offset; 2985 ev_at (w) = w->offset;
2259 2986
2260 EV_FREQUENT_CHECK; 2987 EV_FREQUENT_CHECK;
… …
2266 ANHE_at_cache (periodics [ev_active (w)]); 2993 ANHE_at_cache (periodics [ev_active (w)]);
2267 upheap (periodics, ev_active (w)); 2994 upheap (periodics, ev_active (w));
2268 2995
2269 EV_FREQUENT_CHECK; 2996 EV_FREQUENT_CHECK;
2270 2997
2271 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 2998 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2272} 2999}
2273 3000
2274void noinline 3001void noinline
2275ev_periodic_stop (EV_P_ ev_periodic *w) 3002ev_periodic_stop (EV_P_ ev_periodic *w)
2276{ 3003{
… …
2281 EV_FREQUENT_CHECK; 3008 EV_FREQUENT_CHECK;
2282 3009
2283 { 3010 {
2284 int active = ev_active (w); 3011 int active = ev_active (w);
2285 3012
2286 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); 3013 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2287 3014
2288 --periodiccnt; 3015 --periodiccnt;
2289 3016
2290 if (expect_true (active < periodiccnt + HEAP0)) 3017 if (expect_true (active < periodiccnt + HEAP0))
2291 { 3018 {
2292 periodics [active] = periodics [periodiccnt + HEAP0]; 3019 periodics [active] = periodics [periodiccnt + HEAP0];
2293 adjustheap (periodics, periodiccnt, active); 3020 adjustheap (periodics, periodiccnt, active);
2294 } 3021 }
2295 } 3022 }
2296 3023
2297 EV_FREQUENT_CHECK;
2298
2299 ev_stop (EV_A_ (W)w); 3024 ev_stop (EV_A_ (W)w);
3025
3026 EV_FREQUENT_CHECK;
2300} 3027}
2301 3028
2302void noinline 3029void noinline
2303ev_periodic_again (EV_P_ ev_periodic *w) 3030ev_periodic_again (EV_P_ ev_periodic *w)
2304{ 3031{
… …
2310 3037
2311#ifndef SA_RESTART 3038#ifndef SA_RESTART
2312# define SA_RESTART 0 3039# define SA_RESTART 0
2313#endif 3040#endif
2314 3041
3042#if EV_SIGNAL_ENABLE
3043
2315void noinline 3044void noinline
2316ev_signal_start (EV_P_ ev_signal *w) 3045ev_signal_start (EV_P_ ev_signal *w)
2317{ 3046{
2318#if EV_MULTIPLICITY
2319 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2320#endif
2321 if (expect_false (ev_is_active (w))) 3047 if (expect_false (ev_is_active (w)))
2322 return; 3048 return;
2323 3049
2324 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3050 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2325 3051
2326 evpipe_init (EV_A); 3052#if EV_MULTIPLICITY
3053 assert (("libev: a signal must not be attached to two different loops",
3054 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2327 3055
2328 EV_FREQUENT_CHECK; 3056 signals [w->signum - 1].loop = EV_A;
3057#endif
2329 3058
3059 EV_FREQUENT_CHECK;
3060
3061#if EV_USE_SIGNALFD
3062 if (sigfd == -2)
2330 { 3063 {
2331#ifndef _WIN32 3064 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2332 sigset_t full, prev; 3065 if (sigfd < 0 && errno == EINVAL)
2333 sigfillset (&full); 3066 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2334 sigprocmask (SIG_SETMASK, &full, &prev);
2335#endif
2336 3067
2337 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero); 3068 if (sigfd >= 0)
3069 {
3070 fd_intern (sigfd); /* doing it twice will not hurt */
2338 3071
2339#ifndef _WIN32 3072 sigemptyset (&sigfd_set);
2340 sigprocmask (SIG_SETMASK, &prev, 0); 3073
2341#endif 3074 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3075 ev_set_priority (&sigfd_w, EV_MAXPRI);
3076 ev_io_start (EV_A_ &sigfd_w);
3077 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3078 }
2342 } 3079 }
3080
3081 if (sigfd >= 0)
3082 {
3083 /* TODO: check .head */
3084 sigaddset (&sigfd_set, w->signum);
3085 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3086
3087 signalfd (sigfd, &sigfd_set, 0);
3088 }
3089#endif
2343 3090
2344 ev_start (EV_A_ (W)w, 1); 3091 ev_start (EV_A_ (W)w, 1);
2345 wlist_add (&signals [w->signum - 1].head, (WL)w); 3092 wlist_add (&signals [w->signum - 1].head, (WL)w);
2346 3093
2347 if (!((WL)w)->next) 3094 if (!((WL)w)->next)
3095# if EV_USE_SIGNALFD
3096 if (sigfd < 0) /*TODO*/
3097# endif
2348 { 3098 {
2349#if _WIN32 3099# ifdef _WIN32
3100 evpipe_init (EV_A);
3101
2350 signal (w->signum, ev_sighandler); 3102 signal (w->signum, ev_sighandler);
2351#else 3103# else
2352 struct sigaction sa; 3104 struct sigaction sa;
3105
3106 evpipe_init (EV_A);
3107
2353 sa.sa_handler = ev_sighandler; 3108 sa.sa_handler = ev_sighandler;
2354 sigfillset (&sa.sa_mask); 3109 sigfillset (&sa.sa_mask);
2355 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3110 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2356 sigaction (w->signum, &sa, 0); 3111 sigaction (w->signum, &sa, 0);
3112
3113 if (origflags & EVFLAG_NOSIGMASK)
3114 {
3115 sigemptyset (&sa.sa_mask);
3116 sigaddset (&sa.sa_mask, w->signum);
3117 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3118 }
2357#endif 3119#endif
2358 } 3120 }
2359 3121
2360 EV_FREQUENT_CHECK; 3122 EV_FREQUENT_CHECK;
2361} 3123}
2362 3124
2363void noinline 3125void noinline
… …
2371 3133
2372 wlist_del (&signals [w->signum - 1].head, (WL)w); 3134 wlist_del (&signals [w->signum - 1].head, (WL)w);
2373 ev_stop (EV_A_ (W)w); 3135 ev_stop (EV_A_ (W)w);
2374 3136
2375 if (!signals [w->signum - 1].head) 3137 if (!signals [w->signum - 1].head)
3138 {
3139#if EV_MULTIPLICITY
3140 signals [w->signum - 1].loop = 0; /* unattach from signal */
3141#endif
3142#if EV_USE_SIGNALFD
3143 if (sigfd >= 0)
3144 {
3145 sigset_t ss;
3146
3147 sigemptyset (&ss);
3148 sigaddset (&ss, w->signum);
3149 sigdelset (&sigfd_set, w->signum);
3150
3151 signalfd (sigfd, &sigfd_set, 0);
3152 sigprocmask (SIG_UNBLOCK, &ss, 0);
3153 }
3154 else
3155#endif
2376 signal (w->signum, SIG_DFL); 3156 signal (w->signum, SIG_DFL);
3157 }
2377 3158
2378 EV_FREQUENT_CHECK; 3159 EV_FREQUENT_CHECK;
2379} 3160}
3161
3162#endif
3163
3164#if EV_CHILD_ENABLE
2380 3165
2381void 3166void
2382ev_child_start (EV_P_ ev_child *w) 3167ev_child_start (EV_P_ ev_child *w)
2383{ 3168{
2384#if EV_MULTIPLICITY 3169#if EV_MULTIPLICITY
2385 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3170 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2386#endif 3171#endif
2387 if (expect_false (ev_is_active (w))) 3172 if (expect_false (ev_is_active (w)))
2388 return; 3173 return;
2389 3174
2390 EV_FREQUENT_CHECK; 3175 EV_FREQUENT_CHECK;
2391 3176
2392 ev_start (EV_A_ (W)w, 1); 3177 ev_start (EV_A_ (W)w, 1);
2393 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3178 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2394 3179
2395 EV_FREQUENT_CHECK; 3180 EV_FREQUENT_CHECK;
2396} 3181}
2397 3182
2398void 3183void
… …
2402 if (expect_false (!ev_is_active (w))) 3187 if (expect_false (!ev_is_active (w)))
2403 return; 3188 return;
2404 3189
2405 EV_FREQUENT_CHECK; 3190 EV_FREQUENT_CHECK;
2406 3191
2407 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 3192 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2408 ev_stop (EV_A_ (W)w); 3193 ev_stop (EV_A_ (W)w);
2409 3194
2410 EV_FREQUENT_CHECK; 3195 EV_FREQUENT_CHECK;
2411} 3196}
3197
3198#endif
2412 3199
2413#if EV_STAT_ENABLE 3200#if EV_STAT_ENABLE
2414 3201
2415# ifdef _WIN32 3202# ifdef _WIN32
2416# undef lstat 3203# undef lstat
… …
2422#define MIN_STAT_INTERVAL 0.1074891 3209#define MIN_STAT_INTERVAL 0.1074891
2423 3210
2424static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 3211static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2425 3212
2426#if EV_USE_INOTIFY 3213#if EV_USE_INOTIFY
2427# define EV_INOTIFY_BUFSIZE 8192 3214
3215/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3216# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2428 3217
2429static void noinline 3218static void noinline
2430infy_add (EV_P_ ev_stat *w) 3219infy_add (EV_P_ ev_stat *w)
2431{ 3220{
2432 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); 3221 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);
2433 3222
2434 if (w->wd < 0) 3223 if (w->wd >= 0)
3224 {
3225 struct statfs sfs;
3226
3227 /* now local changes will be tracked by inotify, but remote changes won't */
3228 /* unless the filesystem is known to be local, we therefore still poll */
3229 /* also do poll on <2.6.25, but with normal frequency */
3230
3231 if (!fs_2625)
3232 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3233 else if (!statfs (w->path, &sfs)
3234 && (sfs.f_type == 0x1373 /* devfs */
3235 || sfs.f_type == 0xEF53 /* ext2/3 */
3236 || sfs.f_type == 0x3153464a /* jfs */
3237 || sfs.f_type == 0x52654973 /* reiser3 */
3238 || sfs.f_type == 0x01021994 /* tempfs */
3239 || sfs.f_type == 0x58465342 /* xfs */))
3240 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3241 else
3242 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2435 { 3243 }
3244 else
3245 {
3246 /* can't use inotify, continue to stat */
2436 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 3247 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2437 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2438 3248
2439 /* monitor some parent directory for speedup hints */ 3249 /* if path is not there, monitor some parent directory for speedup hints */
2440 /* note that exceeding the hardcoded path limit is not a correctness issue, */ 3250 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2441 /* but an efficiency issue only */ 3251 /* but an efficiency issue only */
2442 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3252 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2443 { 3253 {
2444 char path [4096]; 3254 char path [4096];
… …
2449 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3259 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2450 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3260 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2451 3261
2452 char *pend = strrchr (path, '/'); 3262 char *pend = strrchr (path, '/');
2453 3263
2454 if (!pend) 3264 if (!pend || pend == path)
2455 break; /* whoops, no '/', complain to your admin */ 3265 break;
2456 3266
2457 *pend = 0; 3267 *pend = 0;
2458 w->wd = inotify_add_watch (fs_fd, path, mask); 3268 w->wd = inotify_add_watch (fs_fd, path, mask);
2459 } 3269 }
2460 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3270 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2461 } 3271 }
2462 } 3272 }
2463 else 3273
2464 { 3274 if (w->wd >= 0)
2465 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3275 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2466 3276
2467 /* now local changes will be tracked by inotify, but remote changes won't */ 3277 /* now re-arm timer, if required */
2468 /* unless the filesystem it known to be local, we therefore still poll */ 3278 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2469 /* also do poll on <2.6.25, but with normal frequency */
2470 struct statfs sfs;
2471
2472 if (fs_2625 && !statfs (w->path, &sfs))
2473 if (sfs.f_type == 0x1373 /* devfs */
2474 || sfs.f_type == 0xEF53 /* ext2/3 */
2475 || sfs.f_type == 0x3153464a /* jfs */
2476 || sfs.f_type == 0x52654973 /* reiser3 */
2477 || sfs.f_type == 0x01021994 /* tempfs */
2478 || sfs.f_type == 0x58465342 /* xfs */)
2479 return;
2480
2481 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2482 ev_timer_again (EV_A_ &w->timer); 3279 ev_timer_again (EV_A_ &w->timer);
2483 } 3280 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2484} 3281}
2485 3282
2486static void noinline 3283static void noinline
2487infy_del (EV_P_ ev_stat *w) 3284infy_del (EV_P_ ev_stat *w)
2488{ 3285{
… …
2491 3288
2492 if (wd < 0) 3289 if (wd < 0)
2493 return; 3290 return;
2494 3291
2495 w->wd = -2; 3292 w->wd = -2;
2496 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3293 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2497 wlist_del (&fs_hash [slot].head, (WL)w); 3294 wlist_del (&fs_hash [slot].head, (WL)w);
2498 3295
2499 /* remove this watcher, if others are watching it, they will rearm */ 3296 /* remove this watcher, if others are watching it, they will rearm */
2500 inotify_rm_watch (fs_fd, wd); 3297 inotify_rm_watch (fs_fd, wd);
2501} 3298}
… …
2503static void noinline 3300static void noinline
2504infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3301infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2505{ 3302{
2506 if (slot < 0) 3303 if (slot < 0)
2507 /* overflow, need to check for all hash slots */ 3304 /* overflow, need to check for all hash slots */
2508 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3305 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2509 infy_wd (EV_A_ slot, wd, ev); 3306 infy_wd (EV_A_ slot, wd, ev);
2510 else 3307 else
2511 { 3308 {
2512 WL w_; 3309 WL w_;
2513 3310
2514 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3311 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2515 { 3312 {
2516 ev_stat *w = (ev_stat *)w_; 3313 ev_stat *w = (ev_stat *)w_;
2517 w_ = w_->next; /* lets us remove this watcher and all before it */ 3314 w_ = w_->next; /* lets us remove this watcher and all before it */
2518 3315
2519 if (w->wd == wd || wd == -1) 3316 if (w->wd == wd || wd == -1)
2520 { 3317 {
2521 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3318 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2522 { 3319 {
3320 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2523 w->wd = -1; 3321 w->wd = -1;
2524 infy_add (EV_A_ w); /* re-add, no matter what */ 3322 infy_add (EV_A_ w); /* re-add, no matter what */
2525 } 3323 }
2526 3324
2527 stat_timer_cb (EV_A_ &w->timer, 0); 3325 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2532 3330
2533static void 3331static void
2534infy_cb (EV_P_ ev_io *w, int revents) 3332infy_cb (EV_P_ ev_io *w, int revents)
2535{ 3333{
2536 char buf [EV_INOTIFY_BUFSIZE]; 3334 char buf [EV_INOTIFY_BUFSIZE];
2537 struct inotify_event *ev = (struct inotify_event *)buf;
2538 int ofs; 3335 int ofs;
2539 int len = read (fs_fd, buf, sizeof (buf)); 3336 int len = read (fs_fd, buf, sizeof (buf));
2540 3337
2541 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3338 for (ofs = 0; ofs < len; )
3339 {
3340 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2542 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3341 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3342 ofs += sizeof (struct inotify_event) + ev->len;
3343 }
2543} 3344}
2544 3345
2545void inline_size 3346inline_size void ecb_cold
2546check_2625 (EV_P) 3347ev_check_2625 (EV_P)
2547{ 3348{
2548 /* kernels < 2.6.25 are borked 3349 /* kernels < 2.6.25 are borked
2549 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 3350 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2550 */ 3351 */
2551 struct utsname buf; 3352 if (ev_linux_version () < 0x020619)
2552 int major, minor, micro;
2553
2554 if (uname (&buf))
2555 return; 3353 return;
2556 3354
2557 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2558 return;
2559
2560 if (major < 2
2561 || (major == 2 && minor < 6)
2562 || (major == 2 && minor == 6 && micro < 25))
2563 return;
2564
2565 fs_2625 = 1; 3355 fs_2625 = 1;
2566} 3356}
2567 3357
2568void inline_size 3358inline_size int
3359infy_newfd (void)
3360{
3361#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3362 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3363 if (fd >= 0)
3364 return fd;
3365#endif
3366 return inotify_init ();
3367}
3368
3369inline_size void
2569infy_init (EV_P) 3370infy_init (EV_P)
2570{ 3371{
2571 if (fs_fd != -2) 3372 if (fs_fd != -2)
2572 return; 3373 return;
2573 3374
2574 fs_fd = -1; 3375 fs_fd = -1;
2575 3376
2576 check_2625 (EV_A); 3377 ev_check_2625 (EV_A);
2577 3378
2578 fs_fd = inotify_init (); 3379 fs_fd = infy_newfd ();
2579 3380
2580 if (fs_fd >= 0) 3381 if (fs_fd >= 0)
2581 { 3382 {
3383 fd_intern (fs_fd);
2582 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3384 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2583 ev_set_priority (&fs_w, EV_MAXPRI); 3385 ev_set_priority (&fs_w, EV_MAXPRI);
2584 ev_io_start (EV_A_ &fs_w); 3386 ev_io_start (EV_A_ &fs_w);
3387 ev_unref (EV_A);
2585 } 3388 }
2586} 3389}
2587 3390
2588void inline_size 3391inline_size void
2589infy_fork (EV_P) 3392infy_fork (EV_P)
2590{ 3393{
2591 int slot; 3394 int slot;
2592 3395
2593 if (fs_fd < 0) 3396 if (fs_fd < 0)
2594 return; 3397 return;
2595 3398
3399 ev_ref (EV_A);
3400 ev_io_stop (EV_A_ &fs_w);
2596 close (fs_fd); 3401 close (fs_fd);
2597 fs_fd = inotify_init (); 3402 fs_fd = infy_newfd ();
2598 3403
3404 if (fs_fd >= 0)
3405 {
3406 fd_intern (fs_fd);
3407 ev_io_set (&fs_w, fs_fd, EV_READ);
3408 ev_io_start (EV_A_ &fs_w);
3409 ev_unref (EV_A);
3410 }
3411
2599 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3412 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2600 { 3413 {
2601 WL w_ = fs_hash [slot].head; 3414 WL w_ = fs_hash [slot].head;
2602 fs_hash [slot].head = 0; 3415 fs_hash [slot].head = 0;
2603 3416
2604 while (w_) 3417 while (w_)
… …
2609 w->wd = -1; 3422 w->wd = -1;
2610 3423
2611 if (fs_fd >= 0) 3424 if (fs_fd >= 0)
2612 infy_add (EV_A_ w); /* re-add, no matter what */ 3425 infy_add (EV_A_ w); /* re-add, no matter what */
2613 else 3426 else
3427 {
3428 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3429 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2614 ev_timer_again (EV_A_ &w->timer); 3430 ev_timer_again (EV_A_ &w->timer);
3431 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3432 }
2615 } 3433 }
2616 } 3434 }
2617} 3435}
2618 3436
2619#endif 3437#endif
… …
2636static void noinline 3454static void noinline
2637stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3455stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2638{ 3456{
2639 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3457 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2640 3458
2641 /* we copy this here each the time so that */ 3459 ev_statdata prev = w->attr;
2642 /* prev has the old value when the callback gets invoked */
2643 w->prev = w->attr;
2644 ev_stat_stat (EV_A_ w); 3460 ev_stat_stat (EV_A_ w);
2645 3461
2646 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3462 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2647 if ( 3463 if (
2648 w->prev.st_dev != w->attr.st_dev 3464 prev.st_dev != w->attr.st_dev
2649 || w->prev.st_ino != w->attr.st_ino 3465 || prev.st_ino != w->attr.st_ino
2650 || w->prev.st_mode != w->attr.st_mode 3466 || prev.st_mode != w->attr.st_mode
2651 || w->prev.st_nlink != w->attr.st_nlink 3467 || prev.st_nlink != w->attr.st_nlink
2652 || w->prev.st_uid != w->attr.st_uid 3468 || prev.st_uid != w->attr.st_uid
2653 || w->prev.st_gid != w->attr.st_gid 3469 || prev.st_gid != w->attr.st_gid
2654 || w->prev.st_rdev != w->attr.st_rdev 3470 || prev.st_rdev != w->attr.st_rdev
2655 || w->prev.st_size != w->attr.st_size 3471 || prev.st_size != w->attr.st_size
2656 || w->prev.st_atime != w->attr.st_atime 3472 || prev.st_atime != w->attr.st_atime
2657 || w->prev.st_mtime != w->attr.st_mtime 3473 || prev.st_mtime != w->attr.st_mtime
2658 || w->prev.st_ctime != w->attr.st_ctime 3474 || prev.st_ctime != w->attr.st_ctime
2659 ) { 3475 ) {
3476 /* we only update w->prev on actual differences */
3477 /* in case we test more often than invoke the callback, */
3478 /* to ensure that prev is always different to attr */
3479 w->prev = prev;
3480
2660 #if EV_USE_INOTIFY 3481 #if EV_USE_INOTIFY
2661 if (fs_fd >= 0) 3482 if (fs_fd >= 0)
2662 { 3483 {
2663 infy_del (EV_A_ w); 3484 infy_del (EV_A_ w);
2664 infy_add (EV_A_ w); 3485 infy_add (EV_A_ w);
… …
2689 3510
2690 if (fs_fd >= 0) 3511 if (fs_fd >= 0)
2691 infy_add (EV_A_ w); 3512 infy_add (EV_A_ w);
2692 else 3513 else
2693#endif 3514#endif
3515 {
2694 ev_timer_again (EV_A_ &w->timer); 3516 ev_timer_again (EV_A_ &w->timer);
3517 ev_unref (EV_A);
3518 }
2695 3519
2696 ev_start (EV_A_ (W)w, 1); 3520 ev_start (EV_A_ (W)w, 1);
2697 3521
2698 EV_FREQUENT_CHECK; 3522 EV_FREQUENT_CHECK;
2699} 3523}
… …
2708 EV_FREQUENT_CHECK; 3532 EV_FREQUENT_CHECK;
2709 3533
2710#if EV_USE_INOTIFY 3534#if EV_USE_INOTIFY
2711 infy_del (EV_A_ w); 3535 infy_del (EV_A_ w);
2712#endif 3536#endif
3537
3538 if (ev_is_active (&w->timer))
3539 {
3540 ev_ref (EV_A);
2713 ev_timer_stop (EV_A_ &w->timer); 3541 ev_timer_stop (EV_A_ &w->timer);
3542 }
2714 3543
2715 ev_stop (EV_A_ (W)w); 3544 ev_stop (EV_A_ (W)w);
2716 3545
2717 EV_FREQUENT_CHECK; 3546 EV_FREQUENT_CHECK;
2718} 3547}
… …
2763 3592
2764 EV_FREQUENT_CHECK; 3593 EV_FREQUENT_CHECK;
2765} 3594}
2766#endif 3595#endif
2767 3596
3597#if EV_PREPARE_ENABLE
2768void 3598void
2769ev_prepare_start (EV_P_ ev_prepare *w) 3599ev_prepare_start (EV_P_ ev_prepare *w)
2770{ 3600{
2771 if (expect_false (ev_is_active (w))) 3601 if (expect_false (ev_is_active (w)))
2772 return; 3602 return;
… …
2798 3628
2799 ev_stop (EV_A_ (W)w); 3629 ev_stop (EV_A_ (W)w);
2800 3630
2801 EV_FREQUENT_CHECK; 3631 EV_FREQUENT_CHECK;
2802} 3632}
3633#endif
2803 3634
3635#if EV_CHECK_ENABLE
2804void 3636void
2805ev_check_start (EV_P_ ev_check *w) 3637ev_check_start (EV_P_ ev_check *w)
2806{ 3638{
2807 if (expect_false (ev_is_active (w))) 3639 if (expect_false (ev_is_active (w)))
2808 return; 3640 return;
… …
2834 3666
2835 ev_stop (EV_A_ (W)w); 3667 ev_stop (EV_A_ (W)w);
2836 3668
2837 EV_FREQUENT_CHECK; 3669 EV_FREQUENT_CHECK;
2838} 3670}
3671#endif
2839 3672
2840#if EV_EMBED_ENABLE 3673#if EV_EMBED_ENABLE
2841void noinline 3674void noinline
2842ev_embed_sweep (EV_P_ ev_embed *w) 3675ev_embed_sweep (EV_P_ ev_embed *w)
2843{ 3676{
2844 ev_loop (w->other, EVLOOP_NONBLOCK); 3677 ev_run (w->other, EVRUN_NOWAIT);
2845} 3678}
2846 3679
2847static void 3680static void
2848embed_io_cb (EV_P_ ev_io *io, int revents) 3681embed_io_cb (EV_P_ ev_io *io, int revents)
2849{ 3682{
2850 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3683 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2851 3684
2852 if (ev_cb (w)) 3685 if (ev_cb (w))
2853 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3686 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2854 else 3687 else
2855 ev_loop (w->other, EVLOOP_NONBLOCK); 3688 ev_run (w->other, EVRUN_NOWAIT);
2856} 3689}
2857 3690
2858static void 3691static void
2859embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 3692embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2860{ 3693{
2861 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 3694 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2862 3695
2863 { 3696 {
2864 struct ev_loop *loop = w->other; 3697 EV_P = w->other;
2865 3698
2866 while (fdchangecnt) 3699 while (fdchangecnt)
2867 { 3700 {
2868 fd_reify (EV_A); 3701 fd_reify (EV_A);
2869 ev_loop (EV_A_ EVLOOP_NONBLOCK); 3702 ev_run (EV_A_ EVRUN_NOWAIT);
2870 } 3703 }
2871 } 3704 }
2872} 3705}
2873 3706
2874static void 3707static void
2875embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) 3708embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2876{ 3709{
2877 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); 3710 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2878 3711
3712 ev_embed_stop (EV_A_ w);
3713
2879 { 3714 {
2880 struct ev_loop *loop = w->other; 3715 EV_P = w->other;
2881 3716
2882 ev_loop_fork (EV_A); 3717 ev_loop_fork (EV_A);
3718 ev_run (EV_A_ EVRUN_NOWAIT);
2883 } 3719 }
3720
3721 ev_embed_start (EV_A_ w);
2884} 3722}
2885 3723
2886#if 0 3724#if 0
2887static void 3725static void
2888embed_idle_cb (EV_P_ ev_idle *idle, int revents) 3726embed_idle_cb (EV_P_ ev_idle *idle, int revents)
… …
2896{ 3734{
2897 if (expect_false (ev_is_active (w))) 3735 if (expect_false (ev_is_active (w)))
2898 return; 3736 return;
2899 3737
2900 { 3738 {
2901 struct ev_loop *loop = w->other; 3739 EV_P = w->other;
2902 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 3740 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2903 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 3741 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2904 } 3742 }
2905 3743
2906 EV_FREQUENT_CHECK; 3744 EV_FREQUENT_CHECK;
2907 3745
… …
2933 3771
2934 ev_io_stop (EV_A_ &w->io); 3772 ev_io_stop (EV_A_ &w->io);
2935 ev_prepare_stop (EV_A_ &w->prepare); 3773 ev_prepare_stop (EV_A_ &w->prepare);
2936 ev_fork_stop (EV_A_ &w->fork); 3774 ev_fork_stop (EV_A_ &w->fork);
2937 3775
3776 ev_stop (EV_A_ (W)w);
3777
2938 EV_FREQUENT_CHECK; 3778 EV_FREQUENT_CHECK;
2939} 3779}
2940#endif 3780#endif
2941 3781
2942#if EV_FORK_ENABLE 3782#if EV_FORK_ENABLE
… …
2975 3815
2976 EV_FREQUENT_CHECK; 3816 EV_FREQUENT_CHECK;
2977} 3817}
2978#endif 3818#endif
2979 3819
3820#if EV_CLEANUP_ENABLE
3821void
3822ev_cleanup_start (EV_P_ ev_cleanup *w)
3823{
3824 if (expect_false (ev_is_active (w)))
3825 return;
3826
3827 EV_FREQUENT_CHECK;
3828
3829 ev_start (EV_A_ (W)w, ++cleanupcnt);
3830 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3831 cleanups [cleanupcnt - 1] = w;
3832
3833 /* cleanup watchers should never keep a refcount on the loop */
3834 ev_unref (EV_A);
3835 EV_FREQUENT_CHECK;
3836}
3837
3838void
3839ev_cleanup_stop (EV_P_ ev_cleanup *w)
3840{
3841 clear_pending (EV_A_ (W)w);
3842 if (expect_false (!ev_is_active (w)))
3843 return;
3844
3845 EV_FREQUENT_CHECK;
3846 ev_ref (EV_A);
3847
3848 {
3849 int active = ev_active (w);
3850
3851 cleanups [active - 1] = cleanups [--cleanupcnt];
3852 ev_active (cleanups [active - 1]) = active;
3853 }
3854
3855 ev_stop (EV_A_ (W)w);
3856
3857 EV_FREQUENT_CHECK;
3858}
3859#endif
3860
2980#if EV_ASYNC_ENABLE 3861#if EV_ASYNC_ENABLE
2981void 3862void
2982ev_async_start (EV_P_ ev_async *w) 3863ev_async_start (EV_P_ ev_async *w)
2983{ 3864{
2984 if (expect_false (ev_is_active (w))) 3865 if (expect_false (ev_is_active (w)))
2985 return; 3866 return;
2986 3867
3868 w->sent = 0;
3869
2987 evpipe_init (EV_A); 3870 evpipe_init (EV_A);
2988 3871
2989 EV_FREQUENT_CHECK; 3872 EV_FREQUENT_CHECK;
2990 3873
2991 ev_start (EV_A_ (W)w, ++asynccnt); 3874 ev_start (EV_A_ (W)w, ++asynccnt);
… …
3018 3901
3019void 3902void
3020ev_async_send (EV_P_ ev_async *w) 3903ev_async_send (EV_P_ ev_async *w)
3021{ 3904{
3022 w->sent = 1; 3905 w->sent = 1;
3023 evpipe_write (EV_A_ &gotasync); 3906 evpipe_write (EV_A_ &async_pending);
3024} 3907}
3025#endif 3908#endif
3026 3909
3027/*****************************************************************************/ 3910/*****************************************************************************/
3028 3911
… …
3068{ 3951{
3069 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3952 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3070 3953
3071 if (expect_false (!once)) 3954 if (expect_false (!once))
3072 { 3955 {
3073 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3956 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3074 return; 3957 return;
3075 } 3958 }
3076 3959
3077 once->cb = cb; 3960 once->cb = cb;
3078 once->arg = arg; 3961 once->arg = arg;
… …
3090 ev_timer_set (&once->to, timeout, 0.); 3973 ev_timer_set (&once->to, timeout, 0.);
3091 ev_timer_start (EV_A_ &once->to); 3974 ev_timer_start (EV_A_ &once->to);
3092 } 3975 }
3093} 3976}
3094 3977
3978/*****************************************************************************/
3979
3980#if EV_WALK_ENABLE
3981void ecb_cold
3982ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3983{
3984 int i, j;
3985 ev_watcher_list *wl, *wn;
3986
3987 if (types & (EV_IO | EV_EMBED))
3988 for (i = 0; i < anfdmax; ++i)
3989 for (wl = anfds [i].head; wl; )
3990 {
3991 wn = wl->next;
3992
3993#if EV_EMBED_ENABLE
3994 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3995 {
3996 if (types & EV_EMBED)
3997 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3998 }
3999 else
4000#endif
4001#if EV_USE_INOTIFY
4002 if (ev_cb ((ev_io *)wl) == infy_cb)
4003 ;
4004 else
4005#endif
4006 if ((ev_io *)wl != &pipe_w)
4007 if (types & EV_IO)
4008 cb (EV_A_ EV_IO, wl);
4009
4010 wl = wn;
4011 }
4012
4013 if (types & (EV_TIMER | EV_STAT))
4014 for (i = timercnt + HEAP0; i-- > HEAP0; )
4015#if EV_STAT_ENABLE
4016 /*TODO: timer is not always active*/
4017 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4018 {
4019 if (types & EV_STAT)
4020 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4021 }
4022 else
4023#endif
4024 if (types & EV_TIMER)
4025 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4026
4027#if EV_PERIODIC_ENABLE
4028 if (types & EV_PERIODIC)
4029 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4030 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4031#endif
4032
4033#if EV_IDLE_ENABLE
4034 if (types & EV_IDLE)
4035 for (j = NUMPRI; i--; )
4036 for (i = idlecnt [j]; i--; )
4037 cb (EV_A_ EV_IDLE, idles [j][i]);
4038#endif
4039
4040#if EV_FORK_ENABLE
4041 if (types & EV_FORK)
4042 for (i = forkcnt; i--; )
4043 if (ev_cb (forks [i]) != embed_fork_cb)
4044 cb (EV_A_ EV_FORK, forks [i]);
4045#endif
4046
4047#if EV_ASYNC_ENABLE
4048 if (types & EV_ASYNC)
4049 for (i = asynccnt; i--; )
4050 cb (EV_A_ EV_ASYNC, asyncs [i]);
4051#endif
4052
4053#if EV_PREPARE_ENABLE
4054 if (types & EV_PREPARE)
4055 for (i = preparecnt; i--; )
4056# if EV_EMBED_ENABLE
4057 if (ev_cb (prepares [i]) != embed_prepare_cb)
4058# endif
4059 cb (EV_A_ EV_PREPARE, prepares [i]);
4060#endif
4061
4062#if EV_CHECK_ENABLE
4063 if (types & EV_CHECK)
4064 for (i = checkcnt; i--; )
4065 cb (EV_A_ EV_CHECK, checks [i]);
4066#endif
4067
4068#if EV_SIGNAL_ENABLE
4069 if (types & EV_SIGNAL)
4070 for (i = 0; i < EV_NSIG - 1; ++i)
4071 for (wl = signals [i].head; wl; )
4072 {
4073 wn = wl->next;
4074 cb (EV_A_ EV_SIGNAL, wl);
4075 wl = wn;
4076 }
4077#endif
4078
4079#if EV_CHILD_ENABLE
4080 if (types & EV_CHILD)
4081 for (i = (EV_PID_HASHSIZE); i--; )
4082 for (wl = childs [i]; wl; )
4083 {
4084 wn = wl->next;
4085 cb (EV_A_ EV_CHILD, wl);
4086 wl = wn;
4087 }
4088#endif
4089/* EV_STAT 0x00001000 /* stat data changed */
4090/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4091}
4092#endif
4093
3095#if EV_MULTIPLICITY 4094#if EV_MULTIPLICITY
3096 #include "ev_wrap.h" 4095 #include "ev_wrap.h"
3097#endif 4096#endif
3098 4097
3099#ifdef __cplusplus 4098EV_CPP(})
3100}
3101#endif
3102 4099

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