ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libev/ev.c
(Generate patch)

Comparing libev/ev.c (file contents):
Revision 1.248 by root, Wed May 21 23:25:21 2008 UTC vs.
Revision 1.357 by root, Sat Oct 23 22:25:44 2010 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 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 *
… …
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_CLOCK_SYSCALL
49# ifndef EV_USE_CLOCK_SYSCALL
50# define EV_USE_CLOCK_SYSCALL 1
51# ifndef EV_USE_REALTIME
52# define EV_USE_REALTIME 0
53# endif
54# ifndef EV_USE_MONOTONIC
55# define EV_USE_MONOTONIC 1
56# endif
57# endif
58# elif !defined(EV_USE_CLOCK_SYSCALL)
59# define EV_USE_CLOCK_SYSCALL 0
60# endif
61
52# if HAVE_CLOCK_GETTIME 62# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC 63# ifndef EV_USE_MONOTONIC
54# define EV_USE_MONOTONIC 1 64# define EV_USE_MONOTONIC 1
55# endif 65# endif
56# ifndef EV_USE_REALTIME 66# ifndef EV_USE_REALTIME
57# define EV_USE_REALTIME 1 67# define EV_USE_REALTIME 0
58# endif 68# endif
59# else 69# else
60# ifndef EV_USE_MONOTONIC 70# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0 71# define EV_USE_MONOTONIC 0
62# endif 72# endif
63# ifndef EV_USE_REALTIME 73# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0 74# define EV_USE_REALTIME 0
65# endif 75# endif
66# endif 76# endif
67 77
78# if HAVE_NANOSLEEP
68# ifndef EV_USE_NANOSLEEP 79# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
70# define EV_USE_NANOSLEEP 1 80# define EV_USE_NANOSLEEP EV_FEATURE_OS
81# endif
71# else 82# else
83# undef EV_USE_NANOSLEEP
72# define EV_USE_NANOSLEEP 0 84# define EV_USE_NANOSLEEP 0
85# endif
86
87# if HAVE_SELECT && HAVE_SYS_SELECT_H
88# ifndef EV_USE_SELECT
89# define EV_USE_SELECT EV_FEATURE_BACKENDS
73# endif 90# endif
91# else
92# undef EV_USE_SELECT
93# define EV_USE_SELECT 0
74# endif 94# endif
75 95
96# if HAVE_POLL && HAVE_POLL_H
76# ifndef EV_USE_SELECT 97# ifndef EV_USE_POLL
77# if HAVE_SELECT && HAVE_SYS_SELECT_H 98# define EV_USE_POLL EV_FEATURE_BACKENDS
78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif 99# endif
82# endif
83
84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
86# define EV_USE_POLL 1
87# else 100# else
101# undef EV_USE_POLL
88# define EV_USE_POLL 0 102# define EV_USE_POLL 0
89# endif
90# endif 103# endif
91 104
92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 105# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94# define EV_USE_EPOLL 1 106# ifndef EV_USE_EPOLL
95# else 107# define EV_USE_EPOLL EV_FEATURE_BACKENDS
96# define EV_USE_EPOLL 0
97# endif 108# endif
109# else
110# undef EV_USE_EPOLL
111# define EV_USE_EPOLL 0
98# endif 112# endif
99 113
114# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
100# ifndef EV_USE_KQUEUE 115# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 116# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif 117# endif
118# else
119# undef EV_USE_KQUEUE
120# define EV_USE_KQUEUE 0
106# endif 121# endif
107 122
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE 123# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1 124# ifndef EV_USE_PORT
111# else 125# define EV_USE_PORT EV_FEATURE_BACKENDS
112# define EV_USE_PORT 0
113# endif 126# endif
127# else
128# undef EV_USE_PORT
129# define EV_USE_PORT 0
114# endif 130# endif
115 131
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 132# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1 133# ifndef EV_USE_INOTIFY
119# else
120# define EV_USE_INOTIFY 0 134# define EV_USE_INOTIFY EV_FEATURE_OS
121# endif 135# endif
136# else
137# undef EV_USE_INOTIFY
138# define EV_USE_INOTIFY 0
122# endif 139# endif
123 140
141# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
124# ifndef EV_USE_EVENTFD 142# ifndef EV_USE_SIGNALFD
125# if HAVE_EVENTFD 143# define EV_USE_SIGNALFD EV_FEATURE_OS
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif 144# endif
145# else
146# undef EV_USE_SIGNALFD
147# define EV_USE_SIGNALFD 0
130# endif 148# endif
131 149
150# if HAVE_EVENTFD
151# ifndef EV_USE_EVENTFD
152# define EV_USE_EVENTFD EV_FEATURE_OS
153# endif
154# else
155# undef EV_USE_EVENTFD
156# define EV_USE_EVENTFD 0
157# endif
158
132#endif 159#endif
133 160
134#include <math.h> 161#include <math.h>
135#include <stdlib.h> 162#include <stdlib.h>
163#include <string.h>
136#include <fcntl.h> 164#include <fcntl.h>
137#include <stddef.h> 165#include <stddef.h>
138 166
139#include <stdio.h> 167#include <stdio.h>
140 168
141#include <assert.h> 169#include <assert.h>
142#include <errno.h> 170#include <errno.h>
143#include <sys/types.h> 171#include <sys/types.h>
144#include <time.h> 172#include <time.h>
173#include <limits.h>
145 174
146#include <signal.h> 175#include <signal.h>
147 176
148#ifdef EV_H 177#ifdef EV_H
149# include EV_H 178# include EV_H
150#else 179#else
151# include "ev.h" 180# include "ev.h"
152#endif 181#endif
182
183EV_CPP(extern "C" {)
153 184
154#ifndef _WIN32 185#ifndef _WIN32
155# include <sys/time.h> 186# include <sys/time.h>
156# include <sys/wait.h> 187# include <sys/wait.h>
157# include <unistd.h> 188# include <unistd.h>
158#else 189#else
190# include <io.h>
159# define WIN32_LEAN_AND_MEAN 191# define WIN32_LEAN_AND_MEAN
160# include <windows.h> 192# include <windows.h>
161# ifndef EV_SELECT_IS_WINSOCKET 193# ifndef EV_SELECT_IS_WINSOCKET
162# define EV_SELECT_IS_WINSOCKET 1 194# define EV_SELECT_IS_WINSOCKET 1
163# endif 195# endif
196# undef EV_AVOID_STDIO
164#endif 197#endif
198
199/* OS X, in its infinite idiocy, actually HARDCODES
200 * a limit of 1024 into their select. Where people have brains,
201 * OS X engineers apparently have a vacuum. Or maybe they were
202 * ordered to have a vacuum, or they do anything for money.
203 * This might help. Or not.
204 */
205#define _DARWIN_UNLIMITED_SELECT 1
165 206
166/* this block tries to deduce configuration from header-defined symbols and defaults */ 207/* this block tries to deduce configuration from header-defined symbols and defaults */
167 208
209/* try to deduce the maximum number of signals on this platform */
210#if defined (EV_NSIG)
211/* use what's provided */
212#elif defined (NSIG)
213# define EV_NSIG (NSIG)
214#elif defined(_NSIG)
215# define EV_NSIG (_NSIG)
216#elif defined (SIGMAX)
217# define EV_NSIG (SIGMAX+1)
218#elif defined (SIG_MAX)
219# define EV_NSIG (SIG_MAX+1)
220#elif defined (_SIG_MAX)
221# define EV_NSIG (_SIG_MAX+1)
222#elif defined (MAXSIG)
223# define EV_NSIG (MAXSIG+1)
224#elif defined (MAX_SIG)
225# define EV_NSIG (MAX_SIG+1)
226#elif defined (SIGARRAYSIZE)
227# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
228#elif defined (_sys_nsig)
229# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
230#else
231# error "unable to find value for NSIG, please report"
232/* to make it compile regardless, just remove the above line, */
233/* but consider reporting it, too! :) */
234# define EV_NSIG 65
235#endif
236
237#ifndef EV_USE_CLOCK_SYSCALL
238# if __linux && __GLIBC__ >= 2
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240# else
241# define EV_USE_CLOCK_SYSCALL 0
242# endif
243#endif
244
168#ifndef EV_USE_MONOTONIC 245#ifndef EV_USE_MONOTONIC
246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else
169# define EV_USE_MONOTONIC 0 249# define EV_USE_MONOTONIC 0
250# endif
170#endif 251#endif
171 252
172#ifndef EV_USE_REALTIME 253#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0 254# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
174#endif 255#endif
175 256
176#ifndef EV_USE_NANOSLEEP 257#ifndef EV_USE_NANOSLEEP
258# if _POSIX_C_SOURCE >= 199309L
259# define EV_USE_NANOSLEEP EV_FEATURE_OS
260# else
177# define EV_USE_NANOSLEEP 0 261# define EV_USE_NANOSLEEP 0
262# endif
178#endif 263#endif
179 264
180#ifndef EV_USE_SELECT 265#ifndef EV_USE_SELECT
181# define EV_USE_SELECT 1 266# define EV_USE_SELECT EV_FEATURE_BACKENDS
182#endif 267#endif
183 268
184#ifndef EV_USE_POLL 269#ifndef EV_USE_POLL
185# ifdef _WIN32 270# ifdef _WIN32
186# define EV_USE_POLL 0 271# define EV_USE_POLL 0
187# else 272# else
188# define EV_USE_POLL 1 273# define EV_USE_POLL EV_FEATURE_BACKENDS
189# endif 274# endif
190#endif 275#endif
191 276
192#ifndef EV_USE_EPOLL 277#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 278# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1 279# define EV_USE_EPOLL EV_FEATURE_BACKENDS
195# else 280# else
196# define EV_USE_EPOLL 0 281# define EV_USE_EPOLL 0
197# endif 282# endif
198#endif 283#endif
199 284
… …
205# define EV_USE_PORT 0 290# define EV_USE_PORT 0
206#endif 291#endif
207 292
208#ifndef EV_USE_INOTIFY 293#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 294# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1 295# define EV_USE_INOTIFY EV_FEATURE_OS
211# else 296# else
212# define EV_USE_INOTIFY 0 297# define EV_USE_INOTIFY 0
213# endif 298# endif
214#endif 299#endif
215 300
216#ifndef EV_PID_HASHSIZE 301#ifndef EV_PID_HASHSIZE
217# if EV_MINIMAL 302# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
218# define EV_PID_HASHSIZE 1
219# else
220# define EV_PID_HASHSIZE 16
221# endif
222#endif 303#endif
223 304
224#ifndef EV_INOTIFY_HASHSIZE 305#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL 306# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
226# define EV_INOTIFY_HASHSIZE 1
227# else
228# define EV_INOTIFY_HASHSIZE 16
229# endif
230#endif 307#endif
231 308
232#ifndef EV_USE_EVENTFD 309#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 310# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1 311# define EV_USE_EVENTFD EV_FEATURE_OS
235# else 312# else
236# define EV_USE_EVENTFD 0 313# define EV_USE_EVENTFD 0
237# endif 314# endif
238#endif 315#endif
239 316
317#ifndef EV_USE_SIGNALFD
318# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
319# define EV_USE_SIGNALFD EV_FEATURE_OS
320# else
321# define EV_USE_SIGNALFD 0
322# endif
323#endif
324
325#if 0 /* debugging */
326# define EV_VERIFY 3
327# define EV_USE_4HEAP 1
328# define EV_HEAP_CACHE_AT 1
329#endif
330
331#ifndef EV_VERIFY
332# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
333#endif
334
240#ifndef EV_USE_4HEAP 335#ifndef EV_USE_4HEAP
241# define EV_USE_4HEAP !EV_MINIMAL 336# define EV_USE_4HEAP EV_FEATURE_DATA
242#endif 337#endif
243 338
244#ifndef EV_HEAP_CACHE_AT 339#ifndef EV_HEAP_CACHE_AT
245# define EV_HEAP_CACHE_AT !EV_MINIMAL 340# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
341#endif
342
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
344/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h>
347# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1
351# else
352# undef EV_USE_CLOCK_SYSCALL
353# define EV_USE_CLOCK_SYSCALL 0
354# endif
246#endif 355#endif
247 356
248/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 357/* this block fixes any misconfiguration where we know we run into trouble otherwise */
358
359#ifdef _AIX
360/* AIX has a completely broken poll.h header */
361# undef EV_USE_POLL
362# define EV_USE_POLL 0
363#endif
249 364
250#ifndef CLOCK_MONOTONIC 365#ifndef CLOCK_MONOTONIC
251# undef EV_USE_MONOTONIC 366# undef EV_USE_MONOTONIC
252# define EV_USE_MONOTONIC 0 367# define EV_USE_MONOTONIC 0
253#endif 368#endif
… …
267# include <sys/select.h> 382# include <sys/select.h>
268# endif 383# endif
269#endif 384#endif
270 385
271#if EV_USE_INOTIFY 386#if EV_USE_INOTIFY
387# include <sys/statfs.h>
272# include <sys/inotify.h> 388# include <sys/inotify.h>
389/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
390# ifndef IN_DONT_FOLLOW
391# undef EV_USE_INOTIFY
392# define EV_USE_INOTIFY 0
393# endif
273#endif 394#endif
274 395
275#if EV_SELECT_IS_WINSOCKET 396#if EV_SELECT_IS_WINSOCKET
276# include <winsock.h> 397# include <winsock.h>
277#endif 398#endif
278 399
279#if EV_USE_EVENTFD 400#if EV_USE_EVENTFD
280/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 401/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
281# include <stdint.h> 402# include <stdint.h>
282# ifdef __cplusplus 403# ifndef EFD_NONBLOCK
283extern "C" { 404# define EFD_NONBLOCK O_NONBLOCK
284# endif 405# endif
285int eventfd (unsigned int initval, int flags); 406# ifndef EFD_CLOEXEC
286# ifdef __cplusplus 407# ifdef O_CLOEXEC
287} 408# define EFD_CLOEXEC O_CLOEXEC
409# else
410# define EFD_CLOEXEC 02000000
411# endif
288# endif 412# endif
413EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
414#endif
415
416#if EV_USE_SIGNALFD
417/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
418# include <stdint.h>
419# ifndef SFD_NONBLOCK
420# define SFD_NONBLOCK O_NONBLOCK
421# endif
422# ifndef SFD_CLOEXEC
423# ifdef O_CLOEXEC
424# define SFD_CLOEXEC O_CLOEXEC
425# else
426# define SFD_CLOEXEC 02000000
427# endif
428# endif
429EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
430
431struct signalfd_siginfo
432{
433 uint32_t ssi_signo;
434 char pad[128 - sizeof (uint32_t)];
435};
289#endif 436#endif
290 437
291/**/ 438/**/
292 439
293/* undefined or zero: no verification done or available */
294/* 1 or higher: ev_loop_verify function available */
295/* 2 or higher: ev_loop_verify is called frequently */
296#define EV_VERIFY 1
297
298#if EV_VERIFY > 1 440#if EV_VERIFY >= 3
299# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 441# define EV_FREQUENT_CHECK ev_verify (EV_A)
300#else 442#else
301# define EV_FREQUENT_CHECK do { } while (0) 443# define EV_FREQUENT_CHECK do { } while (0)
302#endif 444#endif
303 445
304/* 446/*
… …
311 */ 453 */
312#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 454#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
313 455
314#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 456#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
315#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 457#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
316/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */ 458
459#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
460#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
317 461
318#if __GNUC__ >= 4 462#if __GNUC__ >= 4
319# define expect(expr,value) __builtin_expect ((expr),(value)) 463# define expect(expr,value) __builtin_expect ((expr),(value))
320# define noinline __attribute__ ((noinline)) 464# define noinline __attribute__ ((noinline))
321#else 465#else
… …
328 472
329#define expect_false(expr) expect ((expr) != 0, 0) 473#define expect_false(expr) expect ((expr) != 0, 0)
330#define expect_true(expr) expect ((expr) != 0, 1) 474#define expect_true(expr) expect ((expr) != 0, 1)
331#define inline_size static inline 475#define inline_size static inline
332 476
333#if EV_MINIMAL 477#if EV_FEATURE_CODE
478# define inline_speed static inline
479#else
334# define inline_speed static noinline 480# define inline_speed static noinline
481#endif
482
483#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
484
485#if EV_MINPRI == EV_MAXPRI
486# define ABSPRI(w) (((W)w), 0)
335#else 487#else
336# define inline_speed static inline
337#endif
338
339#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
340#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 488# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
489#endif
341 490
342#define EMPTY /* required for microsofts broken pseudo-c compiler */ 491#define EMPTY /* required for microsofts broken pseudo-c compiler */
343#define EMPTY2(a,b) /* used to suppress some warnings */ 492#define EMPTY2(a,b) /* used to suppress some warnings */
344 493
345typedef ev_watcher *W; 494typedef ev_watcher *W;
… …
347typedef ev_watcher_time *WT; 496typedef ev_watcher_time *WT;
348 497
349#define ev_active(w) ((W)(w))->active 498#define ev_active(w) ((W)(w))->active
350#define ev_at(w) ((WT)(w))->at 499#define ev_at(w) ((WT)(w))->at
351 500
501#if EV_USE_REALTIME
502/* sig_atomic_t is used to avoid per-thread variables or locking but still */
503/* giving it a reasonably high chance of working on typical architectures */
504static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
505#endif
506
352#if EV_USE_MONOTONIC 507#if EV_USE_MONOTONIC
353/* sig_atomic_t is used to avoid per-thread variables or locking but still */
354/* giving it a reasonably high chance of working on typical architetcures */
355static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 508static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
509#endif
510
511#ifndef EV_FD_TO_WIN32_HANDLE
512# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
513#endif
514#ifndef EV_WIN32_HANDLE_TO_FD
515# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
516#endif
517#ifndef EV_WIN32_CLOSE_FD
518# define EV_WIN32_CLOSE_FD(fd) close (fd)
356#endif 519#endif
357 520
358#ifdef _WIN32 521#ifdef _WIN32
359# include "ev_win32.c" 522# include "ev_win32.c"
360#endif 523#endif
361 524
362/*****************************************************************************/ 525/*****************************************************************************/
363 526
527#ifdef __linux
528# include <sys/utsname.h>
529#endif
530
531static unsigned int noinline
532ev_linux_version (void)
533{
534#ifdef __linux
535 struct utsname buf;
536 unsigned int v;
537 int i;
538 char *p = buf.release;
539
540 if (uname (&buf))
541 return 0;
542
543 for (i = 3+1; --i; )
544 {
545 unsigned int c = 0;
546
547 for (;;)
548 {
549 if (*p >= '0' && *p <= '9')
550 c = c * 10 + *p++ - '0';
551 else
552 {
553 p += *p == '.';
554 break;
555 }
556 }
557
558 v = (v << 8) | c;
559 }
560
561 return v;
562#else
563 return 0;
564#endif
565}
566
567/*****************************************************************************/
568
569#if EV_AVOID_STDIO
570static void noinline
571ev_printerr (const char *msg)
572{
573 write (STDERR_FILENO, msg, strlen (msg));
574}
575#endif
576
364static void (*syserr_cb)(const char *msg); 577static void (*syserr_cb)(const char *msg);
365 578
366void 579void
367ev_set_syserr_cb (void (*cb)(const char *msg)) 580ev_set_syserr_cb (void (*cb)(const char *msg))
368{ 581{
369 syserr_cb = cb; 582 syserr_cb = cb;
370} 583}
371 584
372static void noinline 585static void noinline
373syserr (const char *msg) 586ev_syserr (const char *msg)
374{ 587{
375 if (!msg) 588 if (!msg)
376 msg = "(libev) system error"; 589 msg = "(libev) system error";
377 590
378 if (syserr_cb) 591 if (syserr_cb)
379 syserr_cb (msg); 592 syserr_cb (msg);
380 else 593 else
381 { 594 {
595#if EV_AVOID_STDIO
596 const char *err = strerror (errno);
597
598 ev_printerr (msg);
599 ev_printerr (": ");
600 ev_printerr (err);
601 ev_printerr ("\n");
602#else
382 perror (msg); 603 perror (msg);
604#endif
383 abort (); 605 abort ();
384 } 606 }
385} 607}
386 608
387static void * 609static void *
388ev_realloc_emul (void *ptr, long size) 610ev_realloc_emul (void *ptr, long size)
389{ 611{
612#if __GLIBC__
613 return realloc (ptr, size);
614#else
390 /* some systems, notably openbsd and darwin, fail to properly 615 /* some systems, notably openbsd and darwin, fail to properly
391 * implement realloc (x, 0) (as required by both ansi c-98 and 616 * implement realloc (x, 0) (as required by both ansi c-89 and
392 * the single unix specification, so work around them here. 617 * the single unix specification, so work around them here.
393 */ 618 */
394 619
395 if (size) 620 if (size)
396 return realloc (ptr, size); 621 return realloc (ptr, size);
397 622
398 free (ptr); 623 free (ptr);
399 return 0; 624 return 0;
625#endif
400} 626}
401 627
402static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 628static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
403 629
404void 630void
… …
412{ 638{
413 ptr = alloc (ptr, size); 639 ptr = alloc (ptr, size);
414 640
415 if (!ptr && size) 641 if (!ptr && size)
416 { 642 {
643#if EV_AVOID_STDIO
644 ev_printerr ("libev: memory allocation failed, aborting.\n");
645#else
417 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 646 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
647#endif
418 abort (); 648 abort ();
419 } 649 }
420 650
421 return ptr; 651 return ptr;
422} 652}
… …
424#define ev_malloc(size) ev_realloc (0, (size)) 654#define ev_malloc(size) ev_realloc (0, (size))
425#define ev_free(ptr) ev_realloc ((ptr), 0) 655#define ev_free(ptr) ev_realloc ((ptr), 0)
426 656
427/*****************************************************************************/ 657/*****************************************************************************/
428 658
659/* set in reify when reification needed */
660#define EV_ANFD_REIFY 1
661
662/* file descriptor info structure */
429typedef struct 663typedef struct
430{ 664{
431 WL head; 665 WL head;
432 unsigned char events; 666 unsigned char events; /* the events watched for */
667 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
668 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
433 unsigned char reify; 669 unsigned char unused;
670#if EV_USE_EPOLL
671 unsigned int egen; /* generation counter to counter epoll bugs */
672#endif
434#if EV_SELECT_IS_WINSOCKET 673#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
435 SOCKET handle; 674 SOCKET handle;
436#endif 675#endif
676#if EV_USE_IOCP
677 OVERLAPPED or, ow;
678#endif
437} ANFD; 679} ANFD;
438 680
681/* stores the pending event set for a given watcher */
439typedef struct 682typedef struct
440{ 683{
441 W w; 684 W w;
442 int events; 685 int events; /* the pending event set for the given watcher */
443} ANPENDING; 686} ANPENDING;
444 687
445#if EV_USE_INOTIFY 688#if EV_USE_INOTIFY
446/* hash table entry per inotify-id */ 689/* hash table entry per inotify-id */
447typedef struct 690typedef struct
… …
450} ANFS; 693} ANFS;
451#endif 694#endif
452 695
453/* Heap Entry */ 696/* Heap Entry */
454#if EV_HEAP_CACHE_AT 697#if EV_HEAP_CACHE_AT
698 /* a heap element */
455 typedef struct { 699 typedef struct {
456 ev_tstamp at; 700 ev_tstamp at;
457 WT w; 701 WT w;
458 } ANHE; 702 } ANHE;
459 703
460 #define ANHE_w(he) (he).w /* access watcher, read-write */ 704 #define ANHE_w(he) (he).w /* access watcher, read-write */
461 #define ANHE_at(he) (he).at /* access cached at, read-only */ 705 #define ANHE_at(he) (he).at /* access cached at, read-only */
462 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */ 706 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
463#else 707#else
708 /* a heap element */
464 typedef WT ANHE; 709 typedef WT ANHE;
465 710
466 #define ANHE_w(he) (he) 711 #define ANHE_w(he) (he)
467 #define ANHE_at(he) (he)->at 712 #define ANHE_at(he) (he)->at
468 #define ANHE_at_cache(he) 713 #define ANHE_at_cache(he)
… …
492 737
493 static int ev_default_loop_ptr; 738 static int ev_default_loop_ptr;
494 739
495#endif 740#endif
496 741
742#if EV_FEATURE_API
743# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
744# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
745# define EV_INVOKE_PENDING invoke_cb (EV_A)
746#else
747# define EV_RELEASE_CB (void)0
748# define EV_ACQUIRE_CB (void)0
749# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
750#endif
751
752#define EVBREAK_RECURSE 0x80
753
497/*****************************************************************************/ 754/*****************************************************************************/
498 755
756#ifndef EV_HAVE_EV_TIME
499ev_tstamp 757ev_tstamp
500ev_time (void) 758ev_time (void)
501{ 759{
502#if EV_USE_REALTIME 760#if EV_USE_REALTIME
761 if (expect_true (have_realtime))
762 {
503 struct timespec ts; 763 struct timespec ts;
504 clock_gettime (CLOCK_REALTIME, &ts); 764 clock_gettime (CLOCK_REALTIME, &ts);
505 return ts.tv_sec + ts.tv_nsec * 1e-9; 765 return ts.tv_sec + ts.tv_nsec * 1e-9;
506#else 766 }
767#endif
768
507 struct timeval tv; 769 struct timeval tv;
508 gettimeofday (&tv, 0); 770 gettimeofday (&tv, 0);
509 return tv.tv_sec + tv.tv_usec * 1e-6; 771 return tv.tv_sec + tv.tv_usec * 1e-6;
510#endif
511} 772}
773#endif
512 774
513ev_tstamp inline_size 775inline_size ev_tstamp
514get_clock (void) 776get_clock (void)
515{ 777{
516#if EV_USE_MONOTONIC 778#if EV_USE_MONOTONIC
517 if (expect_true (have_monotonic)) 779 if (expect_true (have_monotonic))
518 { 780 {
… …
539 if (delay > 0.) 801 if (delay > 0.)
540 { 802 {
541#if EV_USE_NANOSLEEP 803#if EV_USE_NANOSLEEP
542 struct timespec ts; 804 struct timespec ts;
543 805
544 ts.tv_sec = (time_t)delay; 806 EV_TS_SET (ts, delay);
545 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
546
547 nanosleep (&ts, 0); 807 nanosleep (&ts, 0);
548#elif defined(_WIN32) 808#elif defined(_WIN32)
549 Sleep ((unsigned long)(delay * 1e3)); 809 Sleep ((unsigned long)(delay * 1e3));
550#else 810#else
551 struct timeval tv; 811 struct timeval tv;
552 812
553 tv.tv_sec = (time_t)delay; 813 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
554 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 814 /* something not guaranteed by newer posix versions, but guaranteed */
555 815 /* by older ones */
816 EV_TV_SET (tv, delay);
556 select (0, 0, 0, 0, &tv); 817 select (0, 0, 0, 0, &tv);
557#endif 818#endif
558 } 819 }
559} 820}
560 821
561/*****************************************************************************/ 822/*****************************************************************************/
562 823
563#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 824#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
564 825
565int inline_size 826/* find a suitable new size for the given array, */
827/* hopefully by rounding to a nice-to-malloc size */
828inline_size int
566array_nextsize (int elem, int cur, int cnt) 829array_nextsize (int elem, int cur, int cnt)
567{ 830{
568 int ncur = cur + 1; 831 int ncur = cur + 1;
569 832
570 do 833 do
… …
587array_realloc (int elem, void *base, int *cur, int cnt) 850array_realloc (int elem, void *base, int *cur, int cnt)
588{ 851{
589 *cur = array_nextsize (elem, *cur, cnt); 852 *cur = array_nextsize (elem, *cur, cnt);
590 return ev_realloc (base, elem * *cur); 853 return ev_realloc (base, elem * *cur);
591} 854}
855
856#define array_init_zero(base,count) \
857 memset ((void *)(base), 0, sizeof (*(base)) * (count))
592 858
593#define array_needsize(type,base,cur,cnt,init) \ 859#define array_needsize(type,base,cur,cnt,init) \
594 if (expect_false ((cnt) > (cur))) \ 860 if (expect_false ((cnt) > (cur))) \
595 { \ 861 { \
596 int ocur_ = (cur); \ 862 int ocur_ = (cur); \
… …
608 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 874 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
609 } 875 }
610#endif 876#endif
611 877
612#define array_free(stem, idx) \ 878#define array_free(stem, idx) \
613 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 879 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
614 880
615/*****************************************************************************/ 881/*****************************************************************************/
882
883/* dummy callback for pending events */
884static void noinline
885pendingcb (EV_P_ ev_prepare *w, int revents)
886{
887}
616 888
617void noinline 889void noinline
618ev_feed_event (EV_P_ void *w, int revents) 890ev_feed_event (EV_P_ void *w, int revents)
619{ 891{
620 W w_ = (W)w; 892 W w_ = (W)w;
… …
629 pendings [pri][w_->pending - 1].w = w_; 901 pendings [pri][w_->pending - 1].w = w_;
630 pendings [pri][w_->pending - 1].events = revents; 902 pendings [pri][w_->pending - 1].events = revents;
631 } 903 }
632} 904}
633 905
634void inline_speed 906inline_speed void
907feed_reverse (EV_P_ W w)
908{
909 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
910 rfeeds [rfeedcnt++] = w;
911}
912
913inline_size void
914feed_reverse_done (EV_P_ int revents)
915{
916 do
917 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
918 while (rfeedcnt);
919}
920
921inline_speed void
635queue_events (EV_P_ W *events, int eventcnt, int type) 922queue_events (EV_P_ W *events, int eventcnt, int type)
636{ 923{
637 int i; 924 int i;
638 925
639 for (i = 0; i < eventcnt; ++i) 926 for (i = 0; i < eventcnt; ++i)
640 ev_feed_event (EV_A_ events [i], type); 927 ev_feed_event (EV_A_ events [i], type);
641} 928}
642 929
643/*****************************************************************************/ 930/*****************************************************************************/
644 931
645void inline_size 932inline_speed void
646anfds_init (ANFD *base, int count)
647{
648 while (count--)
649 {
650 base->head = 0;
651 base->events = EV_NONE;
652 base->reify = 0;
653
654 ++base;
655 }
656}
657
658void inline_speed
659fd_event (EV_P_ int fd, int revents) 933fd_event_nocheck (EV_P_ int fd, int revents)
660{ 934{
661 ANFD *anfd = anfds + fd; 935 ANFD *anfd = anfds + fd;
662 ev_io *w; 936 ev_io *w;
663 937
664 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 938 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
668 if (ev) 942 if (ev)
669 ev_feed_event (EV_A_ (W)w, ev); 943 ev_feed_event (EV_A_ (W)w, ev);
670 } 944 }
671} 945}
672 946
947/* do not submit kernel events for fds that have reify set */
948/* because that means they changed while we were polling for new events */
949inline_speed void
950fd_event (EV_P_ int fd, int revents)
951{
952 ANFD *anfd = anfds + fd;
953
954 if (expect_true (!anfd->reify))
955 fd_event_nocheck (EV_A_ fd, revents);
956}
957
673void 958void
674ev_feed_fd_event (EV_P_ int fd, int revents) 959ev_feed_fd_event (EV_P_ int fd, int revents)
675{ 960{
676 if (fd >= 0 && fd < anfdmax) 961 if (fd >= 0 && fd < anfdmax)
677 fd_event (EV_A_ fd, revents); 962 fd_event_nocheck (EV_A_ fd, revents);
678} 963}
679 964
680void inline_size 965/* make sure the external fd watch events are in-sync */
966/* with the kernel/libev internal state */
967inline_size void
681fd_reify (EV_P) 968fd_reify (EV_P)
682{ 969{
683 int i; 970 int i;
684 971
685 for (i = 0; i < fdchangecnt; ++i) 972 for (i = 0; i < fdchangecnt; ++i)
686 { 973 {
687 int fd = fdchanges [i]; 974 int fd = fdchanges [i];
688 ANFD *anfd = anfds + fd; 975 ANFD *anfd = anfds + fd;
689 ev_io *w; 976 ev_io *w;
690 977
691 unsigned char events = 0; 978 unsigned char o_events = anfd->events;
979 unsigned char o_reify = anfd->reify;
692 980
693 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 981 anfd->reify = 0;
694 events |= (unsigned char)w->events;
695 982
696#if EV_SELECT_IS_WINSOCKET 983#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
697 if (events) 984 if (o_reify & EV__IOFDSET)
698 { 985 {
699 unsigned long argp; 986 unsigned long arg;
700 #ifdef EV_FD_TO_WIN32_HANDLE
701 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 987 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
702 #else
703 anfd->handle = _get_osfhandle (fd);
704 #endif
705 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 988 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
989 printf ("oi %d %x\n", fd, anfd->handle);//D
706 } 990 }
707#endif 991#endif
708 992
993 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
709 { 994 {
710 unsigned char o_events = anfd->events;
711 unsigned char o_reify = anfd->reify;
712
713 anfd->reify = 0;
714 anfd->events = events; 995 anfd->events = 0;
715 996
716 if (o_events != events || o_reify & EV_IOFDSET) 997 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
998 anfd->events |= (unsigned char)w->events;
999
1000 if (o_events != anfd->events)
1001 o_reify = EV__IOFDSET; /* actually |= */
1002 }
1003
1004 if (o_reify & EV__IOFDSET)
717 backend_modify (EV_A_ fd, o_events, events); 1005 backend_modify (EV_A_ fd, o_events, anfd->events);
718 }
719 } 1006 }
720 1007
721 fdchangecnt = 0; 1008 fdchangecnt = 0;
722} 1009}
723 1010
724void inline_size 1011/* something about the given fd changed */
1012inline_size void
725fd_change (EV_P_ int fd, int flags) 1013fd_change (EV_P_ int fd, int flags)
726{ 1014{
727 unsigned char reify = anfds [fd].reify; 1015 unsigned char reify = anfds [fd].reify;
728 anfds [fd].reify |= flags; 1016 anfds [fd].reify |= flags;
729 1017
… …
733 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1021 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
734 fdchanges [fdchangecnt - 1] = fd; 1022 fdchanges [fdchangecnt - 1] = fd;
735 } 1023 }
736} 1024}
737 1025
738void inline_speed 1026/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1027inline_speed void
739fd_kill (EV_P_ int fd) 1028fd_kill (EV_P_ int fd)
740{ 1029{
741 ev_io *w; 1030 ev_io *w;
742 1031
743 while ((w = (ev_io *)anfds [fd].head)) 1032 while ((w = (ev_io *)anfds [fd].head))
… …
745 ev_io_stop (EV_A_ w); 1034 ev_io_stop (EV_A_ w);
746 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1035 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
747 } 1036 }
748} 1037}
749 1038
750int inline_size 1039/* check whether the given fd is actually valid, for error recovery */
1040inline_size int
751fd_valid (int fd) 1041fd_valid (int fd)
752{ 1042{
753#ifdef _WIN32 1043#ifdef _WIN32
754 return _get_osfhandle (fd) != -1; 1044 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
755#else 1045#else
756 return fcntl (fd, F_GETFD) != -1; 1046 return fcntl (fd, F_GETFD) != -1;
757#endif 1047#endif
758} 1048}
759 1049
… …
763{ 1053{
764 int fd; 1054 int fd;
765 1055
766 for (fd = 0; fd < anfdmax; ++fd) 1056 for (fd = 0; fd < anfdmax; ++fd)
767 if (anfds [fd].events) 1057 if (anfds [fd].events)
768 if (!fd_valid (fd) == -1 && errno == EBADF) 1058 if (!fd_valid (fd) && errno == EBADF)
769 fd_kill (EV_A_ fd); 1059 fd_kill (EV_A_ fd);
770} 1060}
771 1061
772/* called on ENOMEM in select/poll to kill some fds and retry */ 1062/* called on ENOMEM in select/poll to kill some fds and retry */
773static void noinline 1063static void noinline
… …
777 1067
778 for (fd = anfdmax; fd--; ) 1068 for (fd = anfdmax; fd--; )
779 if (anfds [fd].events) 1069 if (anfds [fd].events)
780 { 1070 {
781 fd_kill (EV_A_ fd); 1071 fd_kill (EV_A_ fd);
782 return; 1072 break;
783 } 1073 }
784} 1074}
785 1075
786/* usually called after fork if backend needs to re-arm all fds from scratch */ 1076/* usually called after fork if backend needs to re-arm all fds from scratch */
787static void noinline 1077static void noinline
… …
791 1081
792 for (fd = 0; fd < anfdmax; ++fd) 1082 for (fd = 0; fd < anfdmax; ++fd)
793 if (anfds [fd].events) 1083 if (anfds [fd].events)
794 { 1084 {
795 anfds [fd].events = 0; 1085 anfds [fd].events = 0;
1086 anfds [fd].emask = 0;
796 fd_change (EV_A_ fd, EV_IOFDSET | 1); 1087 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
797 } 1088 }
798} 1089}
799 1090
1091/* used to prepare libev internal fd's */
1092/* this is not fork-safe */
1093inline_speed void
1094fd_intern (int fd)
1095{
1096#ifdef _WIN32
1097 unsigned long arg = 1;
1098 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1099#else
1100 fcntl (fd, F_SETFD, FD_CLOEXEC);
1101 fcntl (fd, F_SETFL, O_NONBLOCK);
1102#endif
1103}
1104
800/*****************************************************************************/ 1105/*****************************************************************************/
801 1106
802/* 1107/*
803 * the heap functions want a real array index. array index 0 uis guaranteed to not 1108 * the heap functions want a real array index. array index 0 is guaranteed to not
804 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives 1109 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
805 * the branching factor of the d-tree. 1110 * the branching factor of the d-tree.
806 */ 1111 */
807 1112
808/* 1113/*
… …
817#define HEAP0 (DHEAP - 1) /* index of first element in heap */ 1122#define HEAP0 (DHEAP - 1) /* index of first element in heap */
818#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0) 1123#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
819#define UPHEAP_DONE(p,k) ((p) == (k)) 1124#define UPHEAP_DONE(p,k) ((p) == (k))
820 1125
821/* away from the root */ 1126/* away from the root */
822void inline_speed 1127inline_speed void
823downheap (ANHE *heap, int N, int k) 1128downheap (ANHE *heap, int N, int k)
824{ 1129{
825 ANHE he = heap [k]; 1130 ANHE he = heap [k];
826 ANHE *E = heap + N + HEAP0; 1131 ANHE *E = heap + N + HEAP0;
827 1132
… …
867#define HEAP0 1 1172#define HEAP0 1
868#define HPARENT(k) ((k) >> 1) 1173#define HPARENT(k) ((k) >> 1)
869#define UPHEAP_DONE(p,k) (!(p)) 1174#define UPHEAP_DONE(p,k) (!(p))
870 1175
871/* away from the root */ 1176/* away from the root */
872void inline_speed 1177inline_speed void
873downheap (ANHE *heap, int N, int k) 1178downheap (ANHE *heap, int N, int k)
874{ 1179{
875 ANHE he = heap [k]; 1180 ANHE he = heap [k];
876 1181
877 for (;;) 1182 for (;;)
878 { 1183 {
879 int c = k << 1; 1184 int c = k << 1;
880 1185
881 if (c > N + HEAP0 - 1) 1186 if (c >= N + HEAP0)
882 break; 1187 break;
883 1188
884 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) 1189 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
885 ? 1 : 0; 1190 ? 1 : 0;
886 1191
… …
897 ev_active (ANHE_w (he)) = k; 1202 ev_active (ANHE_w (he)) = k;
898} 1203}
899#endif 1204#endif
900 1205
901/* towards the root */ 1206/* towards the root */
902void inline_speed 1207inline_speed void
903upheap (ANHE *heap, int k) 1208upheap (ANHE *heap, int k)
904{ 1209{
905 ANHE he = heap [k]; 1210 ANHE he = heap [k];
906 1211
907 for (;;) 1212 for (;;)
… …
918 1223
919 heap [k] = he; 1224 heap [k] = he;
920 ev_active (ANHE_w (he)) = k; 1225 ev_active (ANHE_w (he)) = k;
921} 1226}
922 1227
923void inline_size 1228/* move an element suitably so it is in a correct place */
1229inline_size void
924adjustheap (ANHE *heap, int N, int k) 1230adjustheap (ANHE *heap, int N, int k)
925{ 1231{
926 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k])) 1232 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
927 upheap (heap, k); 1233 upheap (heap, k);
928 else 1234 else
929 downheap (heap, N, k); 1235 downheap (heap, N, k);
930} 1236}
931 1237
932/* rebuild the heap: this function is used only once and executed rarely */ 1238/* rebuild the heap: this function is used only once and executed rarely */
933void inline_size 1239inline_size void
934reheap (ANHE *heap, int N) 1240reheap (ANHE *heap, int N)
935{ 1241{
936 int i; 1242 int i;
1243
937 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */ 1244 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
938 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */ 1245 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
939 for (i = 0; i < N; ++i) 1246 for (i = 0; i < N; ++i)
940 upheap (heap, i + HEAP0); 1247 upheap (heap, i + HEAP0);
941} 1248}
942 1249
943#if EV_VERIFY
944static void
945checkheap (ANHE *heap, int N)
946{
947 int i;
948
949 for (i = HEAP0; i < N + HEAP0; ++i)
950 {
951 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
952 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
953 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
954 }
955}
956#endif
957
958/*****************************************************************************/ 1250/*****************************************************************************/
959 1251
1252/* associate signal watchers to a signal signal */
960typedef struct 1253typedef struct
961{ 1254{
1255 EV_ATOMIC_T pending;
1256#if EV_MULTIPLICITY
1257 EV_P;
1258#endif
962 WL head; 1259 WL head;
963 EV_ATOMIC_T gotsig;
964} ANSIG; 1260} ANSIG;
965 1261
966static ANSIG *signals; 1262static ANSIG signals [EV_NSIG - 1];
967static int signalmax;
968
969static EV_ATOMIC_T gotsig;
970
971void inline_size
972signals_init (ANSIG *base, int count)
973{
974 while (count--)
975 {
976 base->head = 0;
977 base->gotsig = 0;
978
979 ++base;
980 }
981}
982 1263
983/*****************************************************************************/ 1264/*****************************************************************************/
984 1265
985void inline_speed 1266#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
986fd_intern (int fd)
987{
988#ifdef _WIN32
989 int arg = 1;
990 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
991#else
992 fcntl (fd, F_SETFD, FD_CLOEXEC);
993 fcntl (fd, F_SETFL, O_NONBLOCK);
994#endif
995}
996 1267
997static void noinline 1268static void noinline
998evpipe_init (EV_P) 1269evpipe_init (EV_P)
999{ 1270{
1000 if (!ev_is_active (&pipeev)) 1271 if (!ev_is_active (&pipe_w))
1001 { 1272 {
1002#if EV_USE_EVENTFD 1273# if EV_USE_EVENTFD
1274 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1275 if (evfd < 0 && errno == EINVAL)
1003 if ((evfd = eventfd (0, 0)) >= 0) 1276 evfd = eventfd (0, 0);
1277
1278 if (evfd >= 0)
1004 { 1279 {
1005 evpipe [0] = -1; 1280 evpipe [0] = -1;
1006 fd_intern (evfd); 1281 fd_intern (evfd); /* doing it twice doesn't hurt */
1007 ev_io_set (&pipeev, evfd, EV_READ); 1282 ev_io_set (&pipe_w, evfd, EV_READ);
1008 } 1283 }
1009 else 1284 else
1010#endif 1285# endif
1011 { 1286 {
1012 while (pipe (evpipe)) 1287 while (pipe (evpipe))
1013 syserr ("(libev) error creating signal/async pipe"); 1288 ev_syserr ("(libev) error creating signal/async pipe");
1014 1289
1015 fd_intern (evpipe [0]); 1290 fd_intern (evpipe [0]);
1016 fd_intern (evpipe [1]); 1291 fd_intern (evpipe [1]);
1017 ev_io_set (&pipeev, evpipe [0], EV_READ); 1292 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1018 } 1293 }
1019 1294
1020 ev_io_start (EV_A_ &pipeev); 1295 ev_io_start (EV_A_ &pipe_w);
1021 ev_unref (EV_A); /* watcher should not keep loop alive */ 1296 ev_unref (EV_A); /* watcher should not keep loop alive */
1022 } 1297 }
1023} 1298}
1024 1299
1025void inline_size 1300inline_size void
1026evpipe_write (EV_P_ EV_ATOMIC_T *flag) 1301evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1027{ 1302{
1028 if (!*flag) 1303 if (!*flag)
1029 { 1304 {
1030 int old_errno = errno; /* save errno because write might clobber it */ 1305 int old_errno = errno; /* save errno because write might clobber it */
1306 char dummy;
1031 1307
1032 *flag = 1; 1308 *flag = 1;
1033 1309
1034#if EV_USE_EVENTFD 1310#if EV_USE_EVENTFD
1035 if (evfd >= 0) 1311 if (evfd >= 0)
… …
1037 uint64_t counter = 1; 1313 uint64_t counter = 1;
1038 write (evfd, &counter, sizeof (uint64_t)); 1314 write (evfd, &counter, sizeof (uint64_t));
1039 } 1315 }
1040 else 1316 else
1041#endif 1317#endif
1318 /* win32 people keep sending patches that change this write() to send() */
1319 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1320 /* so when you think this write should be a send instead, please find out */
1321 /* where your send() is from - it's definitely not the microsoft send, and */
1322 /* tell me. thank you. */
1042 write (evpipe [1], &old_errno, 1); 1323 write (evpipe [1], &dummy, 1);
1043 1324
1044 errno = old_errno; 1325 errno = old_errno;
1045 } 1326 }
1046} 1327}
1047 1328
1329/* called whenever the libev signal pipe */
1330/* got some events (signal, async) */
1048static void 1331static void
1049pipecb (EV_P_ ev_io *iow, int revents) 1332pipecb (EV_P_ ev_io *iow, int revents)
1050{ 1333{
1334 int i;
1335
1051#if EV_USE_EVENTFD 1336#if EV_USE_EVENTFD
1052 if (evfd >= 0) 1337 if (evfd >= 0)
1053 { 1338 {
1054 uint64_t counter; 1339 uint64_t counter;
1055 read (evfd, &counter, sizeof (uint64_t)); 1340 read (evfd, &counter, sizeof (uint64_t));
1056 } 1341 }
1057 else 1342 else
1058#endif 1343#endif
1059 { 1344 {
1060 char dummy; 1345 char dummy;
1346 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1061 read (evpipe [0], &dummy, 1); 1347 read (evpipe [0], &dummy, 1);
1062 } 1348 }
1063 1349
1064 if (gotsig && ev_is_default_loop (EV_A)) 1350 if (sig_pending)
1065 { 1351 {
1066 int signum; 1352 sig_pending = 0;
1067 gotsig = 0;
1068 1353
1069 for (signum = signalmax; signum--; ) 1354 for (i = EV_NSIG - 1; i--; )
1070 if (signals [signum].gotsig) 1355 if (expect_false (signals [i].pending))
1071 ev_feed_signal_event (EV_A_ signum + 1); 1356 ev_feed_signal_event (EV_A_ i + 1);
1072 } 1357 }
1073 1358
1074#if EV_ASYNC_ENABLE 1359#if EV_ASYNC_ENABLE
1075 if (gotasync) 1360 if (async_pending)
1076 { 1361 {
1077 int i; 1362 async_pending = 0;
1078 gotasync = 0;
1079 1363
1080 for (i = asynccnt; i--; ) 1364 for (i = asynccnt; i--; )
1081 if (asyncs [i]->sent) 1365 if (asyncs [i]->sent)
1082 { 1366 {
1083 asyncs [i]->sent = 0; 1367 asyncs [i]->sent = 0;
… …
1091 1375
1092static void 1376static void
1093ev_sighandler (int signum) 1377ev_sighandler (int signum)
1094{ 1378{
1095#if EV_MULTIPLICITY 1379#if EV_MULTIPLICITY
1096 struct ev_loop *loop = &default_loop_struct; 1380 EV_P = signals [signum - 1].loop;
1097#endif 1381#endif
1098 1382
1099#if _WIN32 1383#ifdef _WIN32
1100 signal (signum, ev_sighandler); 1384 signal (signum, ev_sighandler);
1101#endif 1385#endif
1102 1386
1103 signals [signum - 1].gotsig = 1; 1387 signals [signum - 1].pending = 1;
1104 evpipe_write (EV_A_ &gotsig); 1388 evpipe_write (EV_A_ &sig_pending);
1105} 1389}
1106 1390
1107void noinline 1391void noinline
1108ev_feed_signal_event (EV_P_ int signum) 1392ev_feed_signal_event (EV_P_ int signum)
1109{ 1393{
1110 WL w; 1394 WL w;
1111 1395
1396 if (expect_false (signum <= 0 || signum > EV_NSIG))
1397 return;
1398
1399 --signum;
1400
1112#if EV_MULTIPLICITY 1401#if EV_MULTIPLICITY
1113 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr)); 1402 /* it is permissible to try to feed a signal to the wrong loop */
1114#endif 1403 /* or, likely more useful, feeding a signal nobody is waiting for */
1115 1404
1116 --signum; 1405 if (expect_false (signals [signum].loop != EV_A))
1117
1118 if (signum < 0 || signum >= signalmax)
1119 return; 1406 return;
1407#endif
1120 1408
1121 signals [signum].gotsig = 0; 1409 signals [signum].pending = 0;
1122 1410
1123 for (w = signals [signum].head; w; w = w->next) 1411 for (w = signals [signum].head; w; w = w->next)
1124 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1412 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1125} 1413}
1126 1414
1415#if EV_USE_SIGNALFD
1416static void
1417sigfdcb (EV_P_ ev_io *iow, int revents)
1418{
1419 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1420
1421 for (;;)
1422 {
1423 ssize_t res = read (sigfd, si, sizeof (si));
1424
1425 /* not ISO-C, as res might be -1, but works with SuS */
1426 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1427 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1428
1429 if (res < (ssize_t)sizeof (si))
1430 break;
1431 }
1432}
1433#endif
1434
1435#endif
1436
1127/*****************************************************************************/ 1437/*****************************************************************************/
1128 1438
1439#if EV_CHILD_ENABLE
1129static WL childs [EV_PID_HASHSIZE]; 1440static WL childs [EV_PID_HASHSIZE];
1130
1131#ifndef _WIN32
1132 1441
1133static ev_signal childev; 1442static ev_signal childev;
1134 1443
1135#ifndef WIFCONTINUED 1444#ifndef WIFCONTINUED
1136# define WIFCONTINUED(status) 0 1445# define WIFCONTINUED(status) 0
1137#endif 1446#endif
1138 1447
1139void inline_speed 1448/* handle a single child status event */
1449inline_speed void
1140child_reap (EV_P_ int chain, int pid, int status) 1450child_reap (EV_P_ int chain, int pid, int status)
1141{ 1451{
1142 ev_child *w; 1452 ev_child *w;
1143 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 1453 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1144 1454
1145 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1455 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1146 { 1456 {
1147 if ((w->pid == pid || !w->pid) 1457 if ((w->pid == pid || !w->pid)
1148 && (!traced || (w->flags & 1))) 1458 && (!traced || (w->flags & 1)))
1149 { 1459 {
1150 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 1460 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
1157 1467
1158#ifndef WCONTINUED 1468#ifndef WCONTINUED
1159# define WCONTINUED 0 1469# define WCONTINUED 0
1160#endif 1470#endif
1161 1471
1472/* called on sigchld etc., calls waitpid */
1162static void 1473static void
1163childcb (EV_P_ ev_signal *sw, int revents) 1474childcb (EV_P_ ev_signal *sw, int revents)
1164{ 1475{
1165 int pid, status; 1476 int pid, status;
1166 1477
… …
1174 /* make sure we are called again until all children have been reaped */ 1485 /* make sure we are called again until all children have been reaped */
1175 /* we need to do it this way so that the callback gets called before we continue */ 1486 /* we need to do it this way so that the callback gets called before we continue */
1176 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1487 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1177 1488
1178 child_reap (EV_A_ pid, pid, status); 1489 child_reap (EV_A_ pid, pid, status);
1179 if (EV_PID_HASHSIZE > 1) 1490 if ((EV_PID_HASHSIZE) > 1)
1180 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1491 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1181} 1492}
1182 1493
1183#endif 1494#endif
1184 1495
1185/*****************************************************************************/ 1496/*****************************************************************************/
1186 1497
1498#if EV_USE_IOCP
1499# include "ev_iocp.c"
1500#endif
1187#if EV_USE_PORT 1501#if EV_USE_PORT
1188# include "ev_port.c" 1502# include "ev_port.c"
1189#endif 1503#endif
1190#if EV_USE_KQUEUE 1504#if EV_USE_KQUEUE
1191# include "ev_kqueue.c" 1505# include "ev_kqueue.c"
… …
1247 /* kqueue is borked on everything but netbsd apparently */ 1561 /* kqueue is borked on everything but netbsd apparently */
1248 /* it usually doesn't work correctly on anything but sockets and pipes */ 1562 /* it usually doesn't work correctly on anything but sockets and pipes */
1249 flags &= ~EVBACKEND_KQUEUE; 1563 flags &= ~EVBACKEND_KQUEUE;
1250#endif 1564#endif
1251#ifdef __APPLE__ 1565#ifdef __APPLE__
1252 // flags &= ~EVBACKEND_KQUEUE; for documentation 1566 /* only select works correctly on that "unix-certified" platform */
1253 flags &= ~EVBACKEND_POLL; 1567 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1568 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1569#endif
1570#ifdef __FreeBSD__
1571 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1254#endif 1572#endif
1255 1573
1256 return flags; 1574 return flags;
1257} 1575}
1258 1576
… …
1260ev_embeddable_backends (void) 1578ev_embeddable_backends (void)
1261{ 1579{
1262 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 1580 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1263 1581
1264 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 1582 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1265 /* please fix it and tell me how to detect the fix */ 1583 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1266 flags &= ~EVBACKEND_EPOLL; 1584 flags &= ~EVBACKEND_EPOLL;
1267 1585
1268 return flags; 1586 return flags;
1269} 1587}
1270 1588
1271unsigned int 1589unsigned int
1272ev_backend (EV_P) 1590ev_backend (EV_P)
1273{ 1591{
1274 return backend; 1592 return backend;
1275} 1593}
1276 1594
1595#if EV_FEATURE_API
1277unsigned int 1596unsigned int
1278ev_loop_count (EV_P) 1597ev_iteration (EV_P)
1279{ 1598{
1280 return loop_count; 1599 return loop_count;
1281} 1600}
1282 1601
1602unsigned int
1603ev_depth (EV_P)
1604{
1605 return loop_depth;
1606}
1607
1283void 1608void
1284ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 1609ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1285{ 1610{
1286 io_blocktime = interval; 1611 io_blocktime = interval;
1287} 1612}
… …
1290ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 1615ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1291{ 1616{
1292 timeout_blocktime = interval; 1617 timeout_blocktime = interval;
1293} 1618}
1294 1619
1620void
1621ev_set_userdata (EV_P_ void *data)
1622{
1623 userdata = data;
1624}
1625
1626void *
1627ev_userdata (EV_P)
1628{
1629 return userdata;
1630}
1631
1632void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1633{
1634 invoke_cb = invoke_pending_cb;
1635}
1636
1637void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1638{
1639 release_cb = release;
1640 acquire_cb = acquire;
1641}
1642#endif
1643
1644/* initialise a loop structure, must be zero-initialised */
1295static void noinline 1645static void noinline
1296loop_init (EV_P_ unsigned int flags) 1646loop_init (EV_P_ unsigned int flags)
1297{ 1647{
1298 if (!backend) 1648 if (!backend)
1299 { 1649 {
1650#if EV_USE_REALTIME
1651 if (!have_realtime)
1652 {
1653 struct timespec ts;
1654
1655 if (!clock_gettime (CLOCK_REALTIME, &ts))
1656 have_realtime = 1;
1657 }
1658#endif
1659
1300#if EV_USE_MONOTONIC 1660#if EV_USE_MONOTONIC
1661 if (!have_monotonic)
1301 { 1662 {
1302 struct timespec ts; 1663 struct timespec ts;
1664
1303 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1665 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1304 have_monotonic = 1; 1666 have_monotonic = 1;
1305 } 1667 }
1306#endif 1668#endif
1669
1670 /* pid check not overridable via env */
1671#ifndef _WIN32
1672 if (flags & EVFLAG_FORKCHECK)
1673 curpid = getpid ();
1674#endif
1675
1676 if (!(flags & EVFLAG_NOENV)
1677 && !enable_secure ()
1678 && getenv ("LIBEV_FLAGS"))
1679 flags = atoi (getenv ("LIBEV_FLAGS"));
1307 1680
1308 ev_rt_now = ev_time (); 1681 ev_rt_now = ev_time ();
1309 mn_now = get_clock (); 1682 mn_now = get_clock ();
1310 now_floor = mn_now; 1683 now_floor = mn_now;
1311 rtmn_diff = ev_rt_now - mn_now; 1684 rtmn_diff = ev_rt_now - mn_now;
1685#if EV_FEATURE_API
1686 invoke_cb = ev_invoke_pending;
1687#endif
1312 1688
1313 io_blocktime = 0.; 1689 io_blocktime = 0.;
1314 timeout_blocktime = 0.; 1690 timeout_blocktime = 0.;
1315 backend = 0; 1691 backend = 0;
1316 backend_fd = -1; 1692 backend_fd = -1;
1317 gotasync = 0; 1693 sig_pending = 0;
1694#if EV_ASYNC_ENABLE
1695 async_pending = 0;
1696#endif
1318#if EV_USE_INOTIFY 1697#if EV_USE_INOTIFY
1319 fs_fd = -2; 1698 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1320#endif 1699#endif
1321 1700#if EV_USE_SIGNALFD
1322 /* pid check not overridable via env */ 1701 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1323#ifndef _WIN32
1324 if (flags & EVFLAG_FORKCHECK)
1325 curpid = getpid ();
1326#endif 1702#endif
1327
1328 if (!(flags & EVFLAG_NOENV)
1329 && !enable_secure ()
1330 && getenv ("LIBEV_FLAGS"))
1331 flags = atoi (getenv ("LIBEV_FLAGS"));
1332 1703
1333 if (!(flags & 0x0000ffffU)) 1704 if (!(flags & 0x0000ffffU))
1334 flags |= ev_recommended_backends (); 1705 flags |= ev_recommended_backends ();
1335 1706
1707#if EV_USE_IOCP
1708 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1709#endif
1336#if EV_USE_PORT 1710#if EV_USE_PORT
1337 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1711 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1338#endif 1712#endif
1339#if EV_USE_KQUEUE 1713#if EV_USE_KQUEUE
1340 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1714 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1347#endif 1721#endif
1348#if EV_USE_SELECT 1722#if EV_USE_SELECT
1349 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1723 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1350#endif 1724#endif
1351 1725
1726 ev_prepare_init (&pending_w, pendingcb);
1727
1728#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1352 ev_init (&pipeev, pipecb); 1729 ev_init (&pipe_w, pipecb);
1353 ev_set_priority (&pipeev, EV_MAXPRI); 1730 ev_set_priority (&pipe_w, EV_MAXPRI);
1731#endif
1354 } 1732 }
1355} 1733}
1356 1734
1735/* free up a loop structure */
1357static void noinline 1736static void noinline
1358loop_destroy (EV_P) 1737loop_destroy (EV_P)
1359{ 1738{
1360 int i; 1739 int i;
1361 1740
1362 if (ev_is_active (&pipeev)) 1741 if (ev_is_active (&pipe_w))
1363 { 1742 {
1364 ev_ref (EV_A); /* signal watcher */ 1743 /*ev_ref (EV_A);*/
1365 ev_io_stop (EV_A_ &pipeev); 1744 /*ev_io_stop (EV_A_ &pipe_w);*/
1366 1745
1367#if EV_USE_EVENTFD 1746#if EV_USE_EVENTFD
1368 if (evfd >= 0) 1747 if (evfd >= 0)
1369 close (evfd); 1748 close (evfd);
1370#endif 1749#endif
1371 1750
1372 if (evpipe [0] >= 0) 1751 if (evpipe [0] >= 0)
1373 { 1752 {
1374 close (evpipe [0]); 1753 EV_WIN32_CLOSE_FD (evpipe [0]);
1375 close (evpipe [1]); 1754 EV_WIN32_CLOSE_FD (evpipe [1]);
1376 } 1755 }
1377 } 1756 }
1757
1758#if EV_USE_SIGNALFD
1759 if (ev_is_active (&sigfd_w))
1760 close (sigfd);
1761#endif
1378 1762
1379#if EV_USE_INOTIFY 1763#if EV_USE_INOTIFY
1380 if (fs_fd >= 0) 1764 if (fs_fd >= 0)
1381 close (fs_fd); 1765 close (fs_fd);
1382#endif 1766#endif
1383 1767
1384 if (backend_fd >= 0) 1768 if (backend_fd >= 0)
1385 close (backend_fd); 1769 close (backend_fd);
1386 1770
1771#if EV_USE_IOCP
1772 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1773#endif
1387#if EV_USE_PORT 1774#if EV_USE_PORT
1388 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1775 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1389#endif 1776#endif
1390#if EV_USE_KQUEUE 1777#if EV_USE_KQUEUE
1391 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 1778 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1406#if EV_IDLE_ENABLE 1793#if EV_IDLE_ENABLE
1407 array_free (idle, [i]); 1794 array_free (idle, [i]);
1408#endif 1795#endif
1409 } 1796 }
1410 1797
1411 ev_free (anfds); anfdmax = 0; 1798 ev_free (anfds); anfds = 0; anfdmax = 0;
1412 1799
1413 /* have to use the microsoft-never-gets-it-right macro */ 1800 /* have to use the microsoft-never-gets-it-right macro */
1801 array_free (rfeed, EMPTY);
1414 array_free (fdchange, EMPTY); 1802 array_free (fdchange, EMPTY);
1415 array_free (timer, EMPTY); 1803 array_free (timer, EMPTY);
1416#if EV_PERIODIC_ENABLE 1804#if EV_PERIODIC_ENABLE
1417 array_free (periodic, EMPTY); 1805 array_free (periodic, EMPTY);
1418#endif 1806#endif
… …
1427 1815
1428 backend = 0; 1816 backend = 0;
1429} 1817}
1430 1818
1431#if EV_USE_INOTIFY 1819#if EV_USE_INOTIFY
1432void inline_size infy_fork (EV_P); 1820inline_size void infy_fork (EV_P);
1433#endif 1821#endif
1434 1822
1435void inline_size 1823inline_size void
1436loop_fork (EV_P) 1824loop_fork (EV_P)
1437{ 1825{
1438#if EV_USE_PORT 1826#if EV_USE_PORT
1439 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 1827 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1440#endif 1828#endif
… …
1446#endif 1834#endif
1447#if EV_USE_INOTIFY 1835#if EV_USE_INOTIFY
1448 infy_fork (EV_A); 1836 infy_fork (EV_A);
1449#endif 1837#endif
1450 1838
1451 if (ev_is_active (&pipeev)) 1839 if (ev_is_active (&pipe_w))
1452 { 1840 {
1453 /* this "locks" the handlers against writing to the pipe */ 1841 /* this "locks" the handlers against writing to the pipe */
1454 /* while we modify the fd vars */ 1842 /* while we modify the fd vars */
1455 gotsig = 1; 1843 sig_pending = 1;
1456#if EV_ASYNC_ENABLE 1844#if EV_ASYNC_ENABLE
1457 gotasync = 1; 1845 async_pending = 1;
1458#endif 1846#endif
1459 1847
1460 ev_ref (EV_A); 1848 ev_ref (EV_A);
1461 ev_io_stop (EV_A_ &pipeev); 1849 ev_io_stop (EV_A_ &pipe_w);
1462 1850
1463#if EV_USE_EVENTFD 1851#if EV_USE_EVENTFD
1464 if (evfd >= 0) 1852 if (evfd >= 0)
1465 close (evfd); 1853 close (evfd);
1466#endif 1854#endif
1467 1855
1468 if (evpipe [0] >= 0) 1856 if (evpipe [0] >= 0)
1469 { 1857 {
1470 close (evpipe [0]); 1858 EV_WIN32_CLOSE_FD (evpipe [0]);
1471 close (evpipe [1]); 1859 EV_WIN32_CLOSE_FD (evpipe [1]);
1472 } 1860 }
1473 1861
1862#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1474 evpipe_init (EV_A); 1863 evpipe_init (EV_A);
1475 /* now iterate over everything, in case we missed something */ 1864 /* now iterate over everything, in case we missed something */
1476 pipecb (EV_A_ &pipeev, EV_READ); 1865 pipecb (EV_A_ &pipe_w, EV_READ);
1866#endif
1477 } 1867 }
1478 1868
1479 postfork = 0; 1869 postfork = 0;
1480} 1870}
1481 1871
1482#if EV_MULTIPLICITY 1872#if EV_MULTIPLICITY
1873
1483struct ev_loop * 1874struct ev_loop *
1484ev_loop_new (unsigned int flags) 1875ev_loop_new (unsigned int flags)
1485{ 1876{
1486 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 1877 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1487 1878
1488 memset (loop, 0, sizeof (struct ev_loop)); 1879 memset (EV_A, 0, sizeof (struct ev_loop));
1489
1490 loop_init (EV_A_ flags); 1880 loop_init (EV_A_ flags);
1491 1881
1492 if (ev_backend (EV_A)) 1882 if (ev_backend (EV_A))
1493 return loop; 1883 return EV_A;
1494 1884
1495 return 0; 1885 return 0;
1496} 1886}
1497 1887
1498void 1888void
… …
1505void 1895void
1506ev_loop_fork (EV_P) 1896ev_loop_fork (EV_P)
1507{ 1897{
1508 postfork = 1; /* must be in line with ev_default_fork */ 1898 postfork = 1; /* must be in line with ev_default_fork */
1509} 1899}
1900#endif /* multiplicity */
1510 1901
1511#if EV_VERIFY 1902#if EV_VERIFY
1512static void 1903static void noinline
1904verify_watcher (EV_P_ W w)
1905{
1906 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1907
1908 if (w->pending)
1909 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1910}
1911
1912static void noinline
1913verify_heap (EV_P_ ANHE *heap, int N)
1914{
1915 int i;
1916
1917 for (i = HEAP0; i < N + HEAP0; ++i)
1918 {
1919 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1920 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1921 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1922
1923 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1924 }
1925}
1926
1927static void noinline
1513array_check (W **ws, int cnt) 1928array_verify (EV_P_ W *ws, int cnt)
1514{ 1929{
1515 while (cnt--) 1930 while (cnt--)
1931 {
1516 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 1932 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1933 verify_watcher (EV_A_ ws [cnt]);
1934 }
1517} 1935}
1936#endif
1518 1937
1519static void 1938#if EV_FEATURE_API
1939void
1520ev_loop_verify (EV_P) 1940ev_verify (EV_P)
1521{ 1941{
1942#if EV_VERIFY
1522 int i; 1943 int i;
1944 WL w;
1523 1945
1946 assert (activecnt >= -1);
1947
1948 assert (fdchangemax >= fdchangecnt);
1949 for (i = 0; i < fdchangecnt; ++i)
1950 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1951
1952 assert (anfdmax >= 0);
1953 for (i = 0; i < anfdmax; ++i)
1954 for (w = anfds [i].head; w; w = w->next)
1955 {
1956 verify_watcher (EV_A_ (W)w);
1957 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1958 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1959 }
1960
1961 assert (timermax >= timercnt);
1524 checkheap (timers, timercnt); 1962 verify_heap (EV_A_ timers, timercnt);
1963
1525#if EV_PERIODIC_ENABLE 1964#if EV_PERIODIC_ENABLE
1965 assert (periodicmax >= periodiccnt);
1526 checkheap (periodics, periodiccnt); 1966 verify_heap (EV_A_ periodics, periodiccnt);
1527#endif 1967#endif
1528 1968
1969 for (i = NUMPRI; i--; )
1970 {
1971 assert (pendingmax [i] >= pendingcnt [i]);
1529#if EV_IDLE_ENABLE 1972#if EV_IDLE_ENABLE
1530 for (i = NUMPRI; i--; ) 1973 assert (idleall >= 0);
1974 assert (idlemax [i] >= idlecnt [i]);
1531 array_check ((W **)idles [i], idlecnt [i]); 1975 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1532#endif 1976#endif
1977 }
1978
1533#if EV_FORK_ENABLE 1979#if EV_FORK_ENABLE
1980 assert (forkmax >= forkcnt);
1534 array_check ((W **)forks, forkcnt); 1981 array_verify (EV_A_ (W *)forks, forkcnt);
1535#endif 1982#endif
1536 array_check ((W **)prepares, preparecnt); 1983
1537 array_check ((W **)checks, checkcnt);
1538#if EV_ASYNC_ENABLE 1984#if EV_ASYNC_ENABLE
1985 assert (asyncmax >= asynccnt);
1539 array_check ((W **)asyncs, asynccnt); 1986 array_verify (EV_A_ (W *)asyncs, asynccnt);
1987#endif
1988
1989#if EV_PREPARE_ENABLE
1990 assert (preparemax >= preparecnt);
1991 array_verify (EV_A_ (W *)prepares, preparecnt);
1992#endif
1993
1994#if EV_CHECK_ENABLE
1995 assert (checkmax >= checkcnt);
1996 array_verify (EV_A_ (W *)checks, checkcnt);
1997#endif
1998
1999# if 0
2000#if EV_CHILD_ENABLE
2001 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2002 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2003#endif
1540#endif 2004# endif
1541}
1542#endif 2005#endif
1543 2006}
1544#endif 2007#endif
1545 2008
1546#if EV_MULTIPLICITY 2009#if EV_MULTIPLICITY
1547struct ev_loop * 2010struct ev_loop *
1548ev_default_loop_init (unsigned int flags) 2011ev_default_loop_init (unsigned int flags)
… …
1552#endif 2015#endif
1553{ 2016{
1554 if (!ev_default_loop_ptr) 2017 if (!ev_default_loop_ptr)
1555 { 2018 {
1556#if EV_MULTIPLICITY 2019#if EV_MULTIPLICITY
1557 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2020 EV_P = ev_default_loop_ptr = &default_loop_struct;
1558#else 2021#else
1559 ev_default_loop_ptr = 1; 2022 ev_default_loop_ptr = 1;
1560#endif 2023#endif
1561 2024
1562 loop_init (EV_A_ flags); 2025 loop_init (EV_A_ flags);
1563 2026
1564 if (ev_backend (EV_A)) 2027 if (ev_backend (EV_A))
1565 { 2028 {
1566#ifndef _WIN32 2029#if EV_CHILD_ENABLE
1567 ev_signal_init (&childev, childcb, SIGCHLD); 2030 ev_signal_init (&childev, childcb, SIGCHLD);
1568 ev_set_priority (&childev, EV_MAXPRI); 2031 ev_set_priority (&childev, EV_MAXPRI);
1569 ev_signal_start (EV_A_ &childev); 2032 ev_signal_start (EV_A_ &childev);
1570 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2033 ev_unref (EV_A); /* child watcher should not keep loop alive */
1571#endif 2034#endif
… …
1579 2042
1580void 2043void
1581ev_default_destroy (void) 2044ev_default_destroy (void)
1582{ 2045{
1583#if EV_MULTIPLICITY 2046#if EV_MULTIPLICITY
1584 struct ev_loop *loop = ev_default_loop_ptr; 2047 EV_P = ev_default_loop_ptr;
1585#endif 2048#endif
1586 2049
1587#ifndef _WIN32 2050 ev_default_loop_ptr = 0;
2051
2052#if EV_CHILD_ENABLE
1588 ev_ref (EV_A); /* child watcher */ 2053 ev_ref (EV_A); /* child watcher */
1589 ev_signal_stop (EV_A_ &childev); 2054 ev_signal_stop (EV_A_ &childev);
1590#endif 2055#endif
1591 2056
1592 loop_destroy (EV_A); 2057 loop_destroy (EV_A);
… …
1594 2059
1595void 2060void
1596ev_default_fork (void) 2061ev_default_fork (void)
1597{ 2062{
1598#if EV_MULTIPLICITY 2063#if EV_MULTIPLICITY
1599 struct ev_loop *loop = ev_default_loop_ptr; 2064 EV_P = ev_default_loop_ptr;
1600#endif 2065#endif
1601 2066
1602 if (backend)
1603 postfork = 1; /* must be in line with ev_loop_fork */ 2067 postfork = 1; /* must be in line with ev_loop_fork */
1604} 2068}
1605 2069
1606/*****************************************************************************/ 2070/*****************************************************************************/
1607 2071
1608void 2072void
1609ev_invoke (EV_P_ void *w, int revents) 2073ev_invoke (EV_P_ void *w, int revents)
1610{ 2074{
1611 EV_CB_INVOKE ((W)w, revents); 2075 EV_CB_INVOKE ((W)w, revents);
1612} 2076}
1613 2077
1614void inline_speed 2078unsigned int
1615call_pending (EV_P) 2079ev_pending_count (EV_P)
1616{ 2080{
1617 int pri; 2081 int pri;
2082 unsigned int count = 0;
1618 2083
1619 EV_FREQUENT_CHECK; 2084 for (pri = NUMPRI; pri--; )
2085 count += pendingcnt [pri];
2086
2087 return count;
2088}
2089
2090void noinline
2091ev_invoke_pending (EV_P)
2092{
2093 int pri;
1620 2094
1621 for (pri = NUMPRI; pri--; ) 2095 for (pri = NUMPRI; pri--; )
1622 while (pendingcnt [pri]) 2096 while (pendingcnt [pri])
1623 { 2097 {
1624 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2098 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1625 2099
1626 if (expect_true (p->w))
1627 {
1628 /*assert (("non-pending watcher on pending list", p->w->pending));*/ 2100 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2101 /* ^ this is no longer true, as pending_w could be here */
1629 2102
1630 p->w->pending = 0; 2103 p->w->pending = 0;
1631 EV_CB_INVOKE (p->w, p->events); 2104 EV_CB_INVOKE (p->w, p->events);
1632 } 2105 EV_FREQUENT_CHECK;
1633 } 2106 }
1634
1635 EV_FREQUENT_CHECK;
1636} 2107}
1637 2108
1638#if EV_IDLE_ENABLE 2109#if EV_IDLE_ENABLE
1639void inline_size 2110/* make idle watchers pending. this handles the "call-idle */
2111/* only when higher priorities are idle" logic */
2112inline_size void
1640idle_reify (EV_P) 2113idle_reify (EV_P)
1641{ 2114{
1642 if (expect_false (idleall)) 2115 if (expect_false (idleall))
1643 { 2116 {
1644 int pri; 2117 int pri;
… …
1656 } 2129 }
1657 } 2130 }
1658} 2131}
1659#endif 2132#endif
1660 2133
1661void inline_size 2134/* make timers pending */
2135inline_size void
1662timers_reify (EV_P) 2136timers_reify (EV_P)
1663{ 2137{
1664 EV_FREQUENT_CHECK; 2138 EV_FREQUENT_CHECK;
1665 2139
1666 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now) 2140 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1667 { 2141 {
1668 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]); 2142 do
1669
1670 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1671
1672 /* first reschedule or stop timer */
1673 if (w->repeat)
1674 { 2143 {
2144 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2145
2146 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2147
2148 /* first reschedule or stop timer */
2149 if (w->repeat)
2150 {
1675 ev_at (w) += w->repeat; 2151 ev_at (w) += w->repeat;
1676 if (ev_at (w) < mn_now) 2152 if (ev_at (w) < mn_now)
1677 ev_at (w) = mn_now; 2153 ev_at (w) = mn_now;
1678 2154
1679 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2155 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1680 2156
1681 ANHE_at_cache (timers [HEAP0]); 2157 ANHE_at_cache (timers [HEAP0]);
1682 downheap (timers, timercnt, HEAP0); 2158 downheap (timers, timercnt, HEAP0);
2159 }
2160 else
2161 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2162
2163 EV_FREQUENT_CHECK;
2164 feed_reverse (EV_A_ (W)w);
1683 } 2165 }
1684 else 2166 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1685 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1686 2167
1687 EV_FREQUENT_CHECK; 2168 feed_reverse_done (EV_A_ EV_TIMER);
1688 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1689 } 2169 }
1690} 2170}
1691 2171
1692#if EV_PERIODIC_ENABLE 2172#if EV_PERIODIC_ENABLE
1693void inline_size 2173/* make periodics pending */
2174inline_size void
1694periodics_reify (EV_P) 2175periodics_reify (EV_P)
1695{ 2176{
1696 EV_FREQUENT_CHECK; 2177 EV_FREQUENT_CHECK;
2178
1697 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 2179 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1698 { 2180 {
1699 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 2181 int feed_count = 0;
1700 2182
1701 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/ 2183 do
1702
1703 /* first reschedule or stop timer */
1704 if (w->reschedule_cb)
1705 { 2184 {
2185 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2186
2187 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2188
2189 /* first reschedule or stop timer */
2190 if (w->reschedule_cb)
2191 {
1706 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2192 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1707 2193
1708 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now)); 2194 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1709 2195
1710 ANHE_at_cache (periodics [HEAP0]); 2196 ANHE_at_cache (periodics [HEAP0]);
1711 downheap (periodics, periodiccnt, HEAP0); 2197 downheap (periodics, periodiccnt, HEAP0);
2198 }
2199 else if (w->interval)
2200 {
2201 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2202 /* if next trigger time is not sufficiently in the future, put it there */
2203 /* this might happen because of floating point inexactness */
2204 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2205 {
2206 ev_at (w) += w->interval;
2207
2208 /* if interval is unreasonably low we might still have a time in the past */
2209 /* so correct this. this will make the periodic very inexact, but the user */
2210 /* has effectively asked to get triggered more often than possible */
2211 if (ev_at (w) < ev_rt_now)
2212 ev_at (w) = ev_rt_now;
2213 }
2214
2215 ANHE_at_cache (periodics [HEAP0]);
2216 downheap (periodics, periodiccnt, HEAP0);
2217 }
2218 else
2219 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2220
1712 EV_FREQUENT_CHECK; 2221 EV_FREQUENT_CHECK;
2222 feed_reverse (EV_A_ (W)w);
1713 } 2223 }
1714 else if (w->interval) 2224 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1715 {
1716 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1717 /* if next trigger time is not sufficiently in the future, put it there */
1718 /* this might happen because of floating point inexactness */
1719 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1720 {
1721 ev_at (w) += w->interval;
1722 2225
1723 /* if interval is unreasonably low we might still have a time in the past */
1724 /* so correct this. this will make the periodic very inexact, but the user */
1725 /* has effectively asked to get triggered more often than possible */
1726 if (ev_at (w) < ev_rt_now)
1727 ev_at (w) = ev_rt_now;
1728 }
1729
1730 ANHE_at_cache (periodics [HEAP0]);
1731 downheap (periodics, periodiccnt, HEAP0);
1732 }
1733 else
1734 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1735
1736 EV_FREQUENT_CHECK;
1737 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 2226 feed_reverse_done (EV_A_ EV_PERIODIC);
1738 } 2227 }
1739} 2228}
1740 2229
2230/* simply recalculate all periodics */
2231/* TODO: maybe ensure that at least one event happens when jumping forward? */
1741static void noinline 2232static void noinline
1742periodics_reschedule (EV_P) 2233periodics_reschedule (EV_P)
1743{ 2234{
1744 int i; 2235 int i;
1745 2236
… …
1758 2249
1759 reheap (periodics, periodiccnt); 2250 reheap (periodics, periodiccnt);
1760} 2251}
1761#endif 2252#endif
1762 2253
1763void inline_speed 2254/* adjust all timers by a given offset */
2255static void noinline
2256timers_reschedule (EV_P_ ev_tstamp adjust)
2257{
2258 int i;
2259
2260 for (i = 0; i < timercnt; ++i)
2261 {
2262 ANHE *he = timers + i + HEAP0;
2263 ANHE_w (*he)->at += adjust;
2264 ANHE_at_cache (*he);
2265 }
2266}
2267
2268/* fetch new monotonic and realtime times from the kernel */
2269/* also detect if there was a timejump, and act accordingly */
2270inline_speed void
1764time_update (EV_P_ ev_tstamp max_block) 2271time_update (EV_P_ ev_tstamp max_block)
1765{ 2272{
1766 int i;
1767
1768#if EV_USE_MONOTONIC 2273#if EV_USE_MONOTONIC
1769 if (expect_true (have_monotonic)) 2274 if (expect_true (have_monotonic))
1770 { 2275 {
2276 int i;
1771 ev_tstamp odiff = rtmn_diff; 2277 ev_tstamp odiff = rtmn_diff;
1772 2278
1773 mn_now = get_clock (); 2279 mn_now = get_clock ();
1774 2280
1775 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 2281 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1801 ev_rt_now = ev_time (); 2307 ev_rt_now = ev_time ();
1802 mn_now = get_clock (); 2308 mn_now = get_clock ();
1803 now_floor = mn_now; 2309 now_floor = mn_now;
1804 } 2310 }
1805 2311
2312 /* no timer adjustment, as the monotonic clock doesn't jump */
2313 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1806# if EV_PERIODIC_ENABLE 2314# if EV_PERIODIC_ENABLE
1807 periodics_reschedule (EV_A); 2315 periodics_reschedule (EV_A);
1808# endif 2316# endif
1809 /* no timer adjustment, as the monotonic clock doesn't jump */
1810 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1811 } 2317 }
1812 else 2318 else
1813#endif 2319#endif
1814 { 2320 {
1815 ev_rt_now = ev_time (); 2321 ev_rt_now = ev_time ();
1816 2322
1817 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 2323 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1818 { 2324 {
2325 /* adjust timers. this is easy, as the offset is the same for all of them */
2326 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1819#if EV_PERIODIC_ENABLE 2327#if EV_PERIODIC_ENABLE
1820 periodics_reschedule (EV_A); 2328 periodics_reschedule (EV_A);
1821#endif 2329#endif
1822 /* adjust timers. this is easy, as the offset is the same for all of them */
1823 for (i = 0; i < timercnt; ++i)
1824 {
1825 ANHE *he = timers + i + HEAP0;
1826 ANHE_w (*he)->at += ev_rt_now - mn_now;
1827 ANHE_at_cache (*he);
1828 }
1829 } 2330 }
1830 2331
1831 mn_now = ev_rt_now; 2332 mn_now = ev_rt_now;
1832 } 2333 }
1833} 2334}
1834 2335
1835void 2336void
1836ev_ref (EV_P)
1837{
1838 ++activecnt;
1839}
1840
1841void
1842ev_unref (EV_P)
1843{
1844 --activecnt;
1845}
1846
1847static int loop_done;
1848
1849void
1850ev_loop (EV_P_ int flags) 2337ev_run (EV_P_ int flags)
1851{ 2338{
2339#if EV_FEATURE_API
2340 ++loop_depth;
2341#endif
2342
2343 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2344
1852 loop_done = EVUNLOOP_CANCEL; 2345 loop_done = EVBREAK_CANCEL;
1853 2346
1854 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2347 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1855 2348
1856 do 2349 do
1857 { 2350 {
2351#if EV_VERIFY >= 2
2352 ev_verify (EV_A);
2353#endif
2354
1858#ifndef _WIN32 2355#ifndef _WIN32
1859 if (expect_false (curpid)) /* penalise the forking check even more */ 2356 if (expect_false (curpid)) /* penalise the forking check even more */
1860 if (expect_false (getpid () != curpid)) 2357 if (expect_false (getpid () != curpid))
1861 { 2358 {
1862 curpid = getpid (); 2359 curpid = getpid ();
… …
1868 /* we might have forked, so queue fork handlers */ 2365 /* we might have forked, so queue fork handlers */
1869 if (expect_false (postfork)) 2366 if (expect_false (postfork))
1870 if (forkcnt) 2367 if (forkcnt)
1871 { 2368 {
1872 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2369 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1873 call_pending (EV_A); 2370 EV_INVOKE_PENDING;
1874 } 2371 }
1875#endif 2372#endif
1876 2373
2374#if EV_PREPARE_ENABLE
1877 /* queue prepare watchers (and execute them) */ 2375 /* queue prepare watchers (and execute them) */
1878 if (expect_false (preparecnt)) 2376 if (expect_false (preparecnt))
1879 { 2377 {
1880 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2378 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1881 call_pending (EV_A); 2379 EV_INVOKE_PENDING;
1882 } 2380 }
2381#endif
1883 2382
1884 if (expect_false (!activecnt)) 2383 if (expect_false (loop_done))
1885 break; 2384 break;
1886 2385
1887 /* we might have forked, so reify kernel state if necessary */ 2386 /* we might have forked, so reify kernel state if necessary */
1888 if (expect_false (postfork)) 2387 if (expect_false (postfork))
1889 loop_fork (EV_A); 2388 loop_fork (EV_A);
… …
1894 /* calculate blocking time */ 2393 /* calculate blocking time */
1895 { 2394 {
1896 ev_tstamp waittime = 0.; 2395 ev_tstamp waittime = 0.;
1897 ev_tstamp sleeptime = 0.; 2396 ev_tstamp sleeptime = 0.;
1898 2397
2398 /* remember old timestamp for io_blocktime calculation */
2399 ev_tstamp prev_mn_now = mn_now;
2400
2401 /* update time to cancel out callback processing overhead */
2402 time_update (EV_A_ 1e100);
2403
1899 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 2404 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt)))
1900 { 2405 {
1901 /* update time to cancel out callback processing overhead */
1902 time_update (EV_A_ 1e100);
1903
1904 waittime = MAX_BLOCKTIME; 2406 waittime = MAX_BLOCKTIME;
1905 2407
1906 if (timercnt) 2408 if (timercnt)
1907 { 2409 {
1908 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 2410 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
… …
1915 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 2417 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1916 if (waittime > to) waittime = to; 2418 if (waittime > to) waittime = to;
1917 } 2419 }
1918#endif 2420#endif
1919 2421
2422 /* don't let timeouts decrease the waittime below timeout_blocktime */
1920 if (expect_false (waittime < timeout_blocktime)) 2423 if (expect_false (waittime < timeout_blocktime))
1921 waittime = timeout_blocktime; 2424 waittime = timeout_blocktime;
1922 2425
1923 sleeptime = waittime - backend_fudge; 2426 /* extra check because io_blocktime is commonly 0 */
1924
1925 if (expect_true (sleeptime > io_blocktime)) 2427 if (expect_false (io_blocktime))
1926 sleeptime = io_blocktime;
1927
1928 if (sleeptime)
1929 { 2428 {
2429 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2430
2431 if (sleeptime > waittime - backend_fudge)
2432 sleeptime = waittime - backend_fudge;
2433
2434 if (expect_true (sleeptime > 0.))
2435 {
1930 ev_sleep (sleeptime); 2436 ev_sleep (sleeptime);
1931 waittime -= sleeptime; 2437 waittime -= sleeptime;
2438 }
1932 } 2439 }
1933 } 2440 }
1934 2441
2442#if EV_FEATURE_API
1935 ++loop_count; 2443 ++loop_count;
2444#endif
2445 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1936 backend_poll (EV_A_ waittime); 2446 backend_poll (EV_A_ waittime);
2447 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
1937 2448
1938 /* update ev_rt_now, do magic */ 2449 /* update ev_rt_now, do magic */
1939 time_update (EV_A_ waittime + sleeptime); 2450 time_update (EV_A_ waittime + sleeptime);
1940 } 2451 }
1941 2452
… …
1948#if EV_IDLE_ENABLE 2459#if EV_IDLE_ENABLE
1949 /* queue idle watchers unless other events are pending */ 2460 /* queue idle watchers unless other events are pending */
1950 idle_reify (EV_A); 2461 idle_reify (EV_A);
1951#endif 2462#endif
1952 2463
2464#if EV_CHECK_ENABLE
1953 /* queue check watchers, to be executed first */ 2465 /* queue check watchers, to be executed first */
1954 if (expect_false (checkcnt)) 2466 if (expect_false (checkcnt))
1955 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2467 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2468#endif
1956 2469
1957 call_pending (EV_A); 2470 EV_INVOKE_PENDING;
1958 } 2471 }
1959 while (expect_true ( 2472 while (expect_true (
1960 activecnt 2473 activecnt
1961 && !loop_done 2474 && !loop_done
1962 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 2475 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
1963 )); 2476 ));
1964 2477
1965 if (loop_done == EVUNLOOP_ONE) 2478 if (loop_done == EVBREAK_ONE)
1966 loop_done = EVUNLOOP_CANCEL; 2479 loop_done = EVBREAK_CANCEL;
1967}
1968 2480
2481#if EV_FEATURE_API
2482 --loop_depth;
2483#endif
2484}
2485
1969void 2486void
1970ev_unloop (EV_P_ int how) 2487ev_break (EV_P_ int how)
1971{ 2488{
1972 loop_done = how; 2489 loop_done = how;
1973} 2490}
1974 2491
2492void
2493ev_ref (EV_P)
2494{
2495 ++activecnt;
2496}
2497
2498void
2499ev_unref (EV_P)
2500{
2501 --activecnt;
2502}
2503
2504void
2505ev_now_update (EV_P)
2506{
2507 time_update (EV_A_ 1e100);
2508}
2509
2510void
2511ev_suspend (EV_P)
2512{
2513 ev_now_update (EV_A);
2514}
2515
2516void
2517ev_resume (EV_P)
2518{
2519 ev_tstamp mn_prev = mn_now;
2520
2521 ev_now_update (EV_A);
2522 timers_reschedule (EV_A_ mn_now - mn_prev);
2523#if EV_PERIODIC_ENABLE
2524 /* TODO: really do this? */
2525 periodics_reschedule (EV_A);
2526#endif
2527}
2528
1975/*****************************************************************************/ 2529/*****************************************************************************/
2530/* singly-linked list management, used when the expected list length is short */
1976 2531
1977void inline_size 2532inline_size void
1978wlist_add (WL *head, WL elem) 2533wlist_add (WL *head, WL elem)
1979{ 2534{
1980 elem->next = *head; 2535 elem->next = *head;
1981 *head = elem; 2536 *head = elem;
1982} 2537}
1983 2538
1984void inline_size 2539inline_size void
1985wlist_del (WL *head, WL elem) 2540wlist_del (WL *head, WL elem)
1986{ 2541{
1987 while (*head) 2542 while (*head)
1988 { 2543 {
1989 if (*head == elem) 2544 if (expect_true (*head == elem))
1990 { 2545 {
1991 *head = elem->next; 2546 *head = elem->next;
1992 return; 2547 break;
1993 } 2548 }
1994 2549
1995 head = &(*head)->next; 2550 head = &(*head)->next;
1996 } 2551 }
1997} 2552}
1998 2553
1999void inline_speed 2554/* internal, faster, version of ev_clear_pending */
2555inline_speed void
2000clear_pending (EV_P_ W w) 2556clear_pending (EV_P_ W w)
2001{ 2557{
2002 if (w->pending) 2558 if (w->pending)
2003 { 2559 {
2004 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2560 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2005 w->pending = 0; 2561 w->pending = 0;
2006 } 2562 }
2007} 2563}
2008 2564
2009int 2565int
… …
2013 int pending = w_->pending; 2569 int pending = w_->pending;
2014 2570
2015 if (expect_true (pending)) 2571 if (expect_true (pending))
2016 { 2572 {
2017 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 2573 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2574 p->w = (W)&pending_w;
2018 w_->pending = 0; 2575 w_->pending = 0;
2019 p->w = 0;
2020 return p->events; 2576 return p->events;
2021 } 2577 }
2022 else 2578 else
2023 return 0; 2579 return 0;
2024} 2580}
2025 2581
2026void inline_size 2582inline_size void
2027pri_adjust (EV_P_ W w) 2583pri_adjust (EV_P_ W w)
2028{ 2584{
2029 int pri = w->priority; 2585 int pri = ev_priority (w);
2030 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 2586 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2031 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 2587 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2032 w->priority = pri; 2588 ev_set_priority (w, pri);
2033} 2589}
2034 2590
2035void inline_speed 2591inline_speed void
2036ev_start (EV_P_ W w, int active) 2592ev_start (EV_P_ W w, int active)
2037{ 2593{
2038 pri_adjust (EV_A_ w); 2594 pri_adjust (EV_A_ w);
2039 w->active = active; 2595 w->active = active;
2040 ev_ref (EV_A); 2596 ev_ref (EV_A);
2041} 2597}
2042 2598
2043void inline_size 2599inline_size void
2044ev_stop (EV_P_ W w) 2600ev_stop (EV_P_ W w)
2045{ 2601{
2046 ev_unref (EV_A); 2602 ev_unref (EV_A);
2047 w->active = 0; 2603 w->active = 0;
2048} 2604}
… …
2055 int fd = w->fd; 2611 int fd = w->fd;
2056 2612
2057 if (expect_false (ev_is_active (w))) 2613 if (expect_false (ev_is_active (w)))
2058 return; 2614 return;
2059 2615
2060 assert (("ev_io_start called with negative fd", fd >= 0)); 2616 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2617 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2061 2618
2062 EV_FREQUENT_CHECK; 2619 EV_FREQUENT_CHECK;
2063 2620
2064 ev_start (EV_A_ (W)w, 1); 2621 ev_start (EV_A_ (W)w, 1);
2065 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2622 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2066 wlist_add (&anfds[fd].head, (WL)w); 2623 wlist_add (&anfds[fd].head, (WL)w);
2067 2624
2068 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 2625 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2069 w->events &= ~EV_IOFDSET; 2626 w->events &= ~EV__IOFDSET;
2070 2627
2071 EV_FREQUENT_CHECK; 2628 EV_FREQUENT_CHECK;
2072} 2629}
2073 2630
2074void noinline 2631void noinline
… …
2076{ 2633{
2077 clear_pending (EV_A_ (W)w); 2634 clear_pending (EV_A_ (W)w);
2078 if (expect_false (!ev_is_active (w))) 2635 if (expect_false (!ev_is_active (w)))
2079 return; 2636 return;
2080 2637
2081 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2638 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2082 2639
2083 EV_FREQUENT_CHECK; 2640 EV_FREQUENT_CHECK;
2084 2641
2085 wlist_del (&anfds[w->fd].head, (WL)w); 2642 wlist_del (&anfds[w->fd].head, (WL)w);
2086 ev_stop (EV_A_ (W)w); 2643 ev_stop (EV_A_ (W)w);
2087 2644
2088 fd_change (EV_A_ w->fd, 1); 2645 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2089 2646
2090 EV_FREQUENT_CHECK; 2647 EV_FREQUENT_CHECK;
2091} 2648}
2092 2649
2093void noinline 2650void noinline
… …
2096 if (expect_false (ev_is_active (w))) 2653 if (expect_false (ev_is_active (w)))
2097 return; 2654 return;
2098 2655
2099 ev_at (w) += mn_now; 2656 ev_at (w) += mn_now;
2100 2657
2101 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2658 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2102 2659
2103 EV_FREQUENT_CHECK; 2660 EV_FREQUENT_CHECK;
2104 2661
2105 ++timercnt; 2662 ++timercnt;
2106 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 2663 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
… …
2109 ANHE_at_cache (timers [ev_active (w)]); 2666 ANHE_at_cache (timers [ev_active (w)]);
2110 upheap (timers, ev_active (w)); 2667 upheap (timers, ev_active (w));
2111 2668
2112 EV_FREQUENT_CHECK; 2669 EV_FREQUENT_CHECK;
2113 2670
2114 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 2671 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2115} 2672}
2116 2673
2117void noinline 2674void noinline
2118ev_timer_stop (EV_P_ ev_timer *w) 2675ev_timer_stop (EV_P_ ev_timer *w)
2119{ 2676{
… …
2124 EV_FREQUENT_CHECK; 2681 EV_FREQUENT_CHECK;
2125 2682
2126 { 2683 {
2127 int active = ev_active (w); 2684 int active = ev_active (w);
2128 2685
2129 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); 2686 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2130 2687
2131 --timercnt; 2688 --timercnt;
2132 2689
2133 if (expect_true (active < timercnt + HEAP0)) 2690 if (expect_true (active < timercnt + HEAP0))
2134 { 2691 {
2135 timers [active] = timers [timercnt + HEAP0]; 2692 timers [active] = timers [timercnt + HEAP0];
2136 adjustheap (timers, timercnt, active); 2693 adjustheap (timers, timercnt, active);
2137 } 2694 }
2138 } 2695 }
2139 2696
2140 EV_FREQUENT_CHECK;
2141
2142 ev_at (w) -= mn_now; 2697 ev_at (w) -= mn_now;
2143 2698
2144 ev_stop (EV_A_ (W)w); 2699 ev_stop (EV_A_ (W)w);
2700
2701 EV_FREQUENT_CHECK;
2145} 2702}
2146 2703
2147void noinline 2704void noinline
2148ev_timer_again (EV_P_ ev_timer *w) 2705ev_timer_again (EV_P_ ev_timer *w)
2149{ 2706{
… …
2167 } 2724 }
2168 2725
2169 EV_FREQUENT_CHECK; 2726 EV_FREQUENT_CHECK;
2170} 2727}
2171 2728
2729ev_tstamp
2730ev_timer_remaining (EV_P_ ev_timer *w)
2731{
2732 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2733}
2734
2172#if EV_PERIODIC_ENABLE 2735#if EV_PERIODIC_ENABLE
2173void noinline 2736void noinline
2174ev_periodic_start (EV_P_ ev_periodic *w) 2737ev_periodic_start (EV_P_ ev_periodic *w)
2175{ 2738{
2176 if (expect_false (ev_is_active (w))) 2739 if (expect_false (ev_is_active (w)))
… …
2178 2741
2179 if (w->reschedule_cb) 2742 if (w->reschedule_cb)
2180 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 2743 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2181 else if (w->interval) 2744 else if (w->interval)
2182 { 2745 {
2183 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2746 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2184 /* this formula differs from the one in periodic_reify because we do not always round up */ 2747 /* this formula differs from the one in periodic_reify because we do not always round up */
2185 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2748 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2186 } 2749 }
2187 else 2750 else
2188 ev_at (w) = w->offset; 2751 ev_at (w) = w->offset;
… …
2196 ANHE_at_cache (periodics [ev_active (w)]); 2759 ANHE_at_cache (periodics [ev_active (w)]);
2197 upheap (periodics, ev_active (w)); 2760 upheap (periodics, ev_active (w));
2198 2761
2199 EV_FREQUENT_CHECK; 2762 EV_FREQUENT_CHECK;
2200 2763
2201 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 2764 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2202} 2765}
2203 2766
2204void noinline 2767void noinline
2205ev_periodic_stop (EV_P_ ev_periodic *w) 2768ev_periodic_stop (EV_P_ ev_periodic *w)
2206{ 2769{
… …
2211 EV_FREQUENT_CHECK; 2774 EV_FREQUENT_CHECK;
2212 2775
2213 { 2776 {
2214 int active = ev_active (w); 2777 int active = ev_active (w);
2215 2778
2216 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); 2779 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2217 2780
2218 --periodiccnt; 2781 --periodiccnt;
2219 2782
2220 if (expect_true (active < periodiccnt + HEAP0)) 2783 if (expect_true (active < periodiccnt + HEAP0))
2221 { 2784 {
2222 periodics [active] = periodics [periodiccnt + HEAP0]; 2785 periodics [active] = periodics [periodiccnt + HEAP0];
2223 adjustheap (periodics, periodiccnt, active); 2786 adjustheap (periodics, periodiccnt, active);
2224 } 2787 }
2225 } 2788 }
2226 2789
2227 EV_FREQUENT_CHECK;
2228
2229 ev_stop (EV_A_ (W)w); 2790 ev_stop (EV_A_ (W)w);
2791
2792 EV_FREQUENT_CHECK;
2230} 2793}
2231 2794
2232void noinline 2795void noinline
2233ev_periodic_again (EV_P_ ev_periodic *w) 2796ev_periodic_again (EV_P_ ev_periodic *w)
2234{ 2797{
… …
2240 2803
2241#ifndef SA_RESTART 2804#ifndef SA_RESTART
2242# define SA_RESTART 0 2805# define SA_RESTART 0
2243#endif 2806#endif
2244 2807
2808#if EV_SIGNAL_ENABLE
2809
2245void noinline 2810void noinline
2246ev_signal_start (EV_P_ ev_signal *w) 2811ev_signal_start (EV_P_ ev_signal *w)
2247{ 2812{
2248#if EV_MULTIPLICITY
2249 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2250#endif
2251 if (expect_false (ev_is_active (w))) 2813 if (expect_false (ev_is_active (w)))
2252 return; 2814 return;
2253 2815
2254 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2816 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2255 2817
2256 evpipe_init (EV_A); 2818#if EV_MULTIPLICITY
2819 assert (("libev: a signal must not be attached to two different loops",
2820 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2257 2821
2258 EV_FREQUENT_CHECK; 2822 signals [w->signum - 1].loop = EV_A;
2823#endif
2259 2824
2825 EV_FREQUENT_CHECK;
2826
2827#if EV_USE_SIGNALFD
2828 if (sigfd == -2)
2260 { 2829 {
2261#ifndef _WIN32 2830 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2262 sigset_t full, prev; 2831 if (sigfd < 0 && errno == EINVAL)
2263 sigfillset (&full); 2832 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2264 sigprocmask (SIG_SETMASK, &full, &prev);
2265#endif
2266 2833
2267 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 2834 if (sigfd >= 0)
2835 {
2836 fd_intern (sigfd); /* doing it twice will not hurt */
2268 2837
2269#ifndef _WIN32 2838 sigemptyset (&sigfd_set);
2270 sigprocmask (SIG_SETMASK, &prev, 0); 2839
2271#endif 2840 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2841 ev_set_priority (&sigfd_w, EV_MAXPRI);
2842 ev_io_start (EV_A_ &sigfd_w);
2843 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2844 }
2272 } 2845 }
2846
2847 if (sigfd >= 0)
2848 {
2849 /* TODO: check .head */
2850 sigaddset (&sigfd_set, w->signum);
2851 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2852
2853 signalfd (sigfd, &sigfd_set, 0);
2854 }
2855#endif
2273 2856
2274 ev_start (EV_A_ (W)w, 1); 2857 ev_start (EV_A_ (W)w, 1);
2275 wlist_add (&signals [w->signum - 1].head, (WL)w); 2858 wlist_add (&signals [w->signum - 1].head, (WL)w);
2276 2859
2277 if (!((WL)w)->next) 2860 if (!((WL)w)->next)
2861# if EV_USE_SIGNALFD
2862 if (sigfd < 0) /*TODO*/
2863# endif
2278 { 2864 {
2279#if _WIN32 2865# ifdef _WIN32
2866 evpipe_init (EV_A);
2867
2280 signal (w->signum, ev_sighandler); 2868 signal (w->signum, ev_sighandler);
2281#else 2869# else
2282 struct sigaction sa; 2870 struct sigaction sa;
2871
2872 evpipe_init (EV_A);
2873
2283 sa.sa_handler = ev_sighandler; 2874 sa.sa_handler = ev_sighandler;
2284 sigfillset (&sa.sa_mask); 2875 sigfillset (&sa.sa_mask);
2285 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2876 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2286 sigaction (w->signum, &sa, 0); 2877 sigaction (w->signum, &sa, 0);
2878
2879 sigemptyset (&sa.sa_mask);
2880 sigaddset (&sa.sa_mask, w->signum);
2881 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2287#endif 2882#endif
2288 } 2883 }
2289 2884
2290 EV_FREQUENT_CHECK; 2885 EV_FREQUENT_CHECK;
2291} 2886}
2292 2887
2293void noinline 2888void noinline
… …
2301 2896
2302 wlist_del (&signals [w->signum - 1].head, (WL)w); 2897 wlist_del (&signals [w->signum - 1].head, (WL)w);
2303 ev_stop (EV_A_ (W)w); 2898 ev_stop (EV_A_ (W)w);
2304 2899
2305 if (!signals [w->signum - 1].head) 2900 if (!signals [w->signum - 1].head)
2901 {
2902#if EV_MULTIPLICITY
2903 signals [w->signum - 1].loop = 0; /* unattach from signal */
2904#endif
2905#if EV_USE_SIGNALFD
2906 if (sigfd >= 0)
2907 {
2908 sigset_t ss;
2909
2910 sigemptyset (&ss);
2911 sigaddset (&ss, w->signum);
2912 sigdelset (&sigfd_set, w->signum);
2913
2914 signalfd (sigfd, &sigfd_set, 0);
2915 sigprocmask (SIG_UNBLOCK, &ss, 0);
2916 }
2917 else
2918#endif
2306 signal (w->signum, SIG_DFL); 2919 signal (w->signum, SIG_DFL);
2920 }
2307 2921
2308 EV_FREQUENT_CHECK; 2922 EV_FREQUENT_CHECK;
2309} 2923}
2924
2925#endif
2926
2927#if EV_CHILD_ENABLE
2310 2928
2311void 2929void
2312ev_child_start (EV_P_ ev_child *w) 2930ev_child_start (EV_P_ ev_child *w)
2313{ 2931{
2314#if EV_MULTIPLICITY 2932#if EV_MULTIPLICITY
2315 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 2933 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2316#endif 2934#endif
2317 if (expect_false (ev_is_active (w))) 2935 if (expect_false (ev_is_active (w)))
2318 return; 2936 return;
2319 2937
2320 EV_FREQUENT_CHECK; 2938 EV_FREQUENT_CHECK;
2321 2939
2322 ev_start (EV_A_ (W)w, 1); 2940 ev_start (EV_A_ (W)w, 1);
2323 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 2941 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2324 2942
2325 EV_FREQUENT_CHECK; 2943 EV_FREQUENT_CHECK;
2326} 2944}
2327 2945
2328void 2946void
… …
2332 if (expect_false (!ev_is_active (w))) 2950 if (expect_false (!ev_is_active (w)))
2333 return; 2951 return;
2334 2952
2335 EV_FREQUENT_CHECK; 2953 EV_FREQUENT_CHECK;
2336 2954
2337 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 2955 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2338 ev_stop (EV_A_ (W)w); 2956 ev_stop (EV_A_ (W)w);
2339 2957
2340 EV_FREQUENT_CHECK; 2958 EV_FREQUENT_CHECK;
2341} 2959}
2960
2961#endif
2342 2962
2343#if EV_STAT_ENABLE 2963#if EV_STAT_ENABLE
2344 2964
2345# ifdef _WIN32 2965# ifdef _WIN32
2346# undef lstat 2966# undef lstat
2347# define lstat(a,b) _stati64 (a,b) 2967# define lstat(a,b) _stati64 (a,b)
2348# endif 2968# endif
2349 2969
2350#define DEF_STAT_INTERVAL 5.0074891 2970#define DEF_STAT_INTERVAL 5.0074891
2971#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2351#define MIN_STAT_INTERVAL 0.1074891 2972#define MIN_STAT_INTERVAL 0.1074891
2352 2973
2353static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 2974static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2354 2975
2355#if EV_USE_INOTIFY 2976#if EV_USE_INOTIFY
2356# define EV_INOTIFY_BUFSIZE 8192 2977
2978/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2979# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2357 2980
2358static void noinline 2981static void noinline
2359infy_add (EV_P_ ev_stat *w) 2982infy_add (EV_P_ ev_stat *w)
2360{ 2983{
2361 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); 2984 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);
2362 2985
2363 if (w->wd < 0) 2986 if (w->wd >= 0)
2987 {
2988 struct statfs sfs;
2989
2990 /* now local changes will be tracked by inotify, but remote changes won't */
2991 /* unless the filesystem is known to be local, we therefore still poll */
2992 /* also do poll on <2.6.25, but with normal frequency */
2993
2994 if (!fs_2625)
2995 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2996 else if (!statfs (w->path, &sfs)
2997 && (sfs.f_type == 0x1373 /* devfs */
2998 || sfs.f_type == 0xEF53 /* ext2/3 */
2999 || sfs.f_type == 0x3153464a /* jfs */
3000 || sfs.f_type == 0x52654973 /* reiser3 */
3001 || sfs.f_type == 0x01021994 /* tempfs */
3002 || sfs.f_type == 0x58465342 /* xfs */))
3003 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3004 else
3005 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2364 { 3006 }
2365 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 3007 else
3008 {
3009 /* can't use inotify, continue to stat */
3010 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2366 3011
2367 /* monitor some parent directory for speedup hints */ 3012 /* if path is not there, monitor some parent directory for speedup hints */
2368 /* note that exceeding the hardcoded limit is not a correctness issue, */ 3013 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2369 /* but an efficiency issue only */ 3014 /* but an efficiency issue only */
2370 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 3015 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2371 { 3016 {
2372 char path [4096]; 3017 char path [4096];
2373 strcpy (path, w->path); 3018 strcpy (path, w->path);
… …
2377 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 3022 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2378 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 3023 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2379 3024
2380 char *pend = strrchr (path, '/'); 3025 char *pend = strrchr (path, '/');
2381 3026
2382 if (!pend) 3027 if (!pend || pend == path)
2383 break; /* whoops, no '/', complain to your admin */ 3028 break;
2384 3029
2385 *pend = 0; 3030 *pend = 0;
2386 w->wd = inotify_add_watch (fs_fd, path, mask); 3031 w->wd = inotify_add_watch (fs_fd, path, mask);
2387 } 3032 }
2388 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 3033 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2389 } 3034 }
2390 } 3035 }
2391 else
2392 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2393 3036
2394 if (w->wd >= 0) 3037 if (w->wd >= 0)
2395 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 3038 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3039
3040 /* now re-arm timer, if required */
3041 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3042 ev_timer_again (EV_A_ &w->timer);
3043 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2396} 3044}
2397 3045
2398static void noinline 3046static void noinline
2399infy_del (EV_P_ ev_stat *w) 3047infy_del (EV_P_ ev_stat *w)
2400{ 3048{
… …
2403 3051
2404 if (wd < 0) 3052 if (wd < 0)
2405 return; 3053 return;
2406 3054
2407 w->wd = -2; 3055 w->wd = -2;
2408 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 3056 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2409 wlist_del (&fs_hash [slot].head, (WL)w); 3057 wlist_del (&fs_hash [slot].head, (WL)w);
2410 3058
2411 /* remove this watcher, if others are watching it, they will rearm */ 3059 /* remove this watcher, if others are watching it, they will rearm */
2412 inotify_rm_watch (fs_fd, wd); 3060 inotify_rm_watch (fs_fd, wd);
2413} 3061}
2414 3062
2415static void noinline 3063static void noinline
2416infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 3064infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2417{ 3065{
2418 if (slot < 0) 3066 if (slot < 0)
2419 /* overflow, need to check for all hahs slots */ 3067 /* overflow, need to check for all hash slots */
2420 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3068 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2421 infy_wd (EV_A_ slot, wd, ev); 3069 infy_wd (EV_A_ slot, wd, ev);
2422 else 3070 else
2423 { 3071 {
2424 WL w_; 3072 WL w_;
2425 3073
2426 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 3074 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2427 { 3075 {
2428 ev_stat *w = (ev_stat *)w_; 3076 ev_stat *w = (ev_stat *)w_;
2429 w_ = w_->next; /* lets us remove this watcher and all before it */ 3077 w_ = w_->next; /* lets us remove this watcher and all before it */
2430 3078
2431 if (w->wd == wd || wd == -1) 3079 if (w->wd == wd || wd == -1)
2432 { 3080 {
2433 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 3081 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2434 { 3082 {
3083 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2435 w->wd = -1; 3084 w->wd = -1;
2436 infy_add (EV_A_ w); /* re-add, no matter what */ 3085 infy_add (EV_A_ w); /* re-add, no matter what */
2437 } 3086 }
2438 3087
2439 stat_timer_cb (EV_A_ &w->timer, 0); 3088 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2444 3093
2445static void 3094static void
2446infy_cb (EV_P_ ev_io *w, int revents) 3095infy_cb (EV_P_ ev_io *w, int revents)
2447{ 3096{
2448 char buf [EV_INOTIFY_BUFSIZE]; 3097 char buf [EV_INOTIFY_BUFSIZE];
2449 struct inotify_event *ev = (struct inotify_event *)buf;
2450 int ofs; 3098 int ofs;
2451 int len = read (fs_fd, buf, sizeof (buf)); 3099 int len = read (fs_fd, buf, sizeof (buf));
2452 3100
2453 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3101 for (ofs = 0; ofs < len; )
3102 {
3103 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2454 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3104 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3105 ofs += sizeof (struct inotify_event) + ev->len;
3106 }
2455} 3107}
2456 3108
2457void inline_size 3109inline_size void
3110ev_check_2625 (EV_P)
3111{
3112 /* kernels < 2.6.25 are borked
3113 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3114 */
3115 if (ev_linux_version () < 0x020619)
3116 return;
3117
3118 fs_2625 = 1;
3119}
3120
3121inline_size int
3122infy_newfd (void)
3123{
3124#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3125 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3126 if (fd >= 0)
3127 return fd;
3128#endif
3129 return inotify_init ();
3130}
3131
3132inline_size void
2458infy_init (EV_P) 3133infy_init (EV_P)
2459{ 3134{
2460 if (fs_fd != -2) 3135 if (fs_fd != -2)
2461 return; 3136 return;
2462 3137
3138 fs_fd = -1;
3139
3140 ev_check_2625 (EV_A);
3141
2463 fs_fd = inotify_init (); 3142 fs_fd = infy_newfd ();
2464 3143
2465 if (fs_fd >= 0) 3144 if (fs_fd >= 0)
2466 { 3145 {
3146 fd_intern (fs_fd);
2467 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3147 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2468 ev_set_priority (&fs_w, EV_MAXPRI); 3148 ev_set_priority (&fs_w, EV_MAXPRI);
2469 ev_io_start (EV_A_ &fs_w); 3149 ev_io_start (EV_A_ &fs_w);
3150 ev_unref (EV_A);
2470 } 3151 }
2471} 3152}
2472 3153
2473void inline_size 3154inline_size void
2474infy_fork (EV_P) 3155infy_fork (EV_P)
2475{ 3156{
2476 int slot; 3157 int slot;
2477 3158
2478 if (fs_fd < 0) 3159 if (fs_fd < 0)
2479 return; 3160 return;
2480 3161
3162 ev_ref (EV_A);
3163 ev_io_stop (EV_A_ &fs_w);
2481 close (fs_fd); 3164 close (fs_fd);
2482 fs_fd = inotify_init (); 3165 fs_fd = infy_newfd ();
2483 3166
3167 if (fs_fd >= 0)
3168 {
3169 fd_intern (fs_fd);
3170 ev_io_set (&fs_w, fs_fd, EV_READ);
3171 ev_io_start (EV_A_ &fs_w);
3172 ev_unref (EV_A);
3173 }
3174
2484 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3175 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2485 { 3176 {
2486 WL w_ = fs_hash [slot].head; 3177 WL w_ = fs_hash [slot].head;
2487 fs_hash [slot].head = 0; 3178 fs_hash [slot].head = 0;
2488 3179
2489 while (w_) 3180 while (w_)
… …
2494 w->wd = -1; 3185 w->wd = -1;
2495 3186
2496 if (fs_fd >= 0) 3187 if (fs_fd >= 0)
2497 infy_add (EV_A_ w); /* re-add, no matter what */ 3188 infy_add (EV_A_ w); /* re-add, no matter what */
2498 else 3189 else
3190 {
3191 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3192 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2499 ev_timer_start (EV_A_ &w->timer); 3193 ev_timer_again (EV_A_ &w->timer);
3194 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3195 }
2500 } 3196 }
2501
2502 } 3197 }
2503} 3198}
2504 3199
3200#endif
3201
3202#ifdef _WIN32
3203# define EV_LSTAT(p,b) _stati64 (p, b)
3204#else
3205# define EV_LSTAT(p,b) lstat (p, b)
2505#endif 3206#endif
2506 3207
2507void 3208void
2508ev_stat_stat (EV_P_ ev_stat *w) 3209ev_stat_stat (EV_P_ ev_stat *w)
2509{ 3210{
… …
2516static void noinline 3217static void noinline
2517stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3218stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2518{ 3219{
2519 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3220 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2520 3221
2521 /* we copy this here each the time so that */ 3222 ev_statdata prev = w->attr;
2522 /* prev has the old value when the callback gets invoked */
2523 w->prev = w->attr;
2524 ev_stat_stat (EV_A_ w); 3223 ev_stat_stat (EV_A_ w);
2525 3224
2526 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3225 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2527 if ( 3226 if (
2528 w->prev.st_dev != w->attr.st_dev 3227 prev.st_dev != w->attr.st_dev
2529 || w->prev.st_ino != w->attr.st_ino 3228 || prev.st_ino != w->attr.st_ino
2530 || w->prev.st_mode != w->attr.st_mode 3229 || prev.st_mode != w->attr.st_mode
2531 || w->prev.st_nlink != w->attr.st_nlink 3230 || prev.st_nlink != w->attr.st_nlink
2532 || w->prev.st_uid != w->attr.st_uid 3231 || prev.st_uid != w->attr.st_uid
2533 || w->prev.st_gid != w->attr.st_gid 3232 || prev.st_gid != w->attr.st_gid
2534 || w->prev.st_rdev != w->attr.st_rdev 3233 || prev.st_rdev != w->attr.st_rdev
2535 || w->prev.st_size != w->attr.st_size 3234 || prev.st_size != w->attr.st_size
2536 || w->prev.st_atime != w->attr.st_atime 3235 || prev.st_atime != w->attr.st_atime
2537 || w->prev.st_mtime != w->attr.st_mtime 3236 || prev.st_mtime != w->attr.st_mtime
2538 || w->prev.st_ctime != w->attr.st_ctime 3237 || prev.st_ctime != w->attr.st_ctime
2539 ) { 3238 ) {
3239 /* we only update w->prev on actual differences */
3240 /* in case we test more often than invoke the callback, */
3241 /* to ensure that prev is always different to attr */
3242 w->prev = prev;
3243
2540 #if EV_USE_INOTIFY 3244 #if EV_USE_INOTIFY
3245 if (fs_fd >= 0)
3246 {
2541 infy_del (EV_A_ w); 3247 infy_del (EV_A_ w);
2542 infy_add (EV_A_ w); 3248 infy_add (EV_A_ w);
2543 ev_stat_stat (EV_A_ w); /* avoid race... */ 3249 ev_stat_stat (EV_A_ w); /* avoid race... */
3250 }
2544 #endif 3251 #endif
2545 3252
2546 ev_feed_event (EV_A_ w, EV_STAT); 3253 ev_feed_event (EV_A_ w, EV_STAT);
2547 } 3254 }
2548} 3255}
… …
2551ev_stat_start (EV_P_ ev_stat *w) 3258ev_stat_start (EV_P_ ev_stat *w)
2552{ 3259{
2553 if (expect_false (ev_is_active (w))) 3260 if (expect_false (ev_is_active (w)))
2554 return; 3261 return;
2555 3262
2556 /* since we use memcmp, we need to clear any padding data etc. */
2557 memset (&w->prev, 0, sizeof (ev_statdata));
2558 memset (&w->attr, 0, sizeof (ev_statdata));
2559
2560 ev_stat_stat (EV_A_ w); 3263 ev_stat_stat (EV_A_ w);
2561 3264
3265 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2562 if (w->interval < MIN_STAT_INTERVAL) 3266 w->interval = MIN_STAT_INTERVAL;
2563 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2564 3267
2565 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3268 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2566 ev_set_priority (&w->timer, ev_priority (w)); 3269 ev_set_priority (&w->timer, ev_priority (w));
2567 3270
2568#if EV_USE_INOTIFY 3271#if EV_USE_INOTIFY
2569 infy_init (EV_A); 3272 infy_init (EV_A);
2570 3273
2571 if (fs_fd >= 0) 3274 if (fs_fd >= 0)
2572 infy_add (EV_A_ w); 3275 infy_add (EV_A_ w);
2573 else 3276 else
2574#endif 3277#endif
3278 {
2575 ev_timer_start (EV_A_ &w->timer); 3279 ev_timer_again (EV_A_ &w->timer);
3280 ev_unref (EV_A);
3281 }
2576 3282
2577 ev_start (EV_A_ (W)w, 1); 3283 ev_start (EV_A_ (W)w, 1);
2578 3284
2579 EV_FREQUENT_CHECK; 3285 EV_FREQUENT_CHECK;
2580} 3286}
… …
2589 EV_FREQUENT_CHECK; 3295 EV_FREQUENT_CHECK;
2590 3296
2591#if EV_USE_INOTIFY 3297#if EV_USE_INOTIFY
2592 infy_del (EV_A_ w); 3298 infy_del (EV_A_ w);
2593#endif 3299#endif
3300
3301 if (ev_is_active (&w->timer))
3302 {
3303 ev_ref (EV_A);
2594 ev_timer_stop (EV_A_ &w->timer); 3304 ev_timer_stop (EV_A_ &w->timer);
3305 }
2595 3306
2596 ev_stop (EV_A_ (W)w); 3307 ev_stop (EV_A_ (W)w);
2597 3308
2598 EV_FREQUENT_CHECK; 3309 EV_FREQUENT_CHECK;
2599} 3310}
… …
2644 3355
2645 EV_FREQUENT_CHECK; 3356 EV_FREQUENT_CHECK;
2646} 3357}
2647#endif 3358#endif
2648 3359
3360#if EV_PREPARE_ENABLE
2649void 3361void
2650ev_prepare_start (EV_P_ ev_prepare *w) 3362ev_prepare_start (EV_P_ ev_prepare *w)
2651{ 3363{
2652 if (expect_false (ev_is_active (w))) 3364 if (expect_false (ev_is_active (w)))
2653 return; 3365 return;
… …
2679 3391
2680 ev_stop (EV_A_ (W)w); 3392 ev_stop (EV_A_ (W)w);
2681 3393
2682 EV_FREQUENT_CHECK; 3394 EV_FREQUENT_CHECK;
2683} 3395}
3396#endif
2684 3397
3398#if EV_CHECK_ENABLE
2685void 3399void
2686ev_check_start (EV_P_ ev_check *w) 3400ev_check_start (EV_P_ ev_check *w)
2687{ 3401{
2688 if (expect_false (ev_is_active (w))) 3402 if (expect_false (ev_is_active (w)))
2689 return; 3403 return;
… …
2715 3429
2716 ev_stop (EV_A_ (W)w); 3430 ev_stop (EV_A_ (W)w);
2717 3431
2718 EV_FREQUENT_CHECK; 3432 EV_FREQUENT_CHECK;
2719} 3433}
3434#endif
2720 3435
2721#if EV_EMBED_ENABLE 3436#if EV_EMBED_ENABLE
2722void noinline 3437void noinline
2723ev_embed_sweep (EV_P_ ev_embed *w) 3438ev_embed_sweep (EV_P_ ev_embed *w)
2724{ 3439{
2725 ev_loop (w->other, EVLOOP_NONBLOCK); 3440 ev_run (w->other, EVRUN_NOWAIT);
2726} 3441}
2727 3442
2728static void 3443static void
2729embed_io_cb (EV_P_ ev_io *io, int revents) 3444embed_io_cb (EV_P_ ev_io *io, int revents)
2730{ 3445{
2731 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3446 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2732 3447
2733 if (ev_cb (w)) 3448 if (ev_cb (w))
2734 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3449 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2735 else 3450 else
2736 ev_loop (w->other, EVLOOP_NONBLOCK); 3451 ev_run (w->other, EVRUN_NOWAIT);
2737} 3452}
2738 3453
2739static void 3454static void
2740embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 3455embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2741{ 3456{
2742 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 3457 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2743 3458
2744 { 3459 {
2745 struct ev_loop *loop = w->other; 3460 EV_P = w->other;
2746 3461
2747 while (fdchangecnt) 3462 while (fdchangecnt)
2748 { 3463 {
2749 fd_reify (EV_A); 3464 fd_reify (EV_A);
2750 ev_loop (EV_A_ EVLOOP_NONBLOCK); 3465 ev_run (EV_A_ EVRUN_NOWAIT);
2751 } 3466 }
2752 } 3467 }
3468}
3469
3470static void
3471embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3472{
3473 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3474
3475 ev_embed_stop (EV_A_ w);
3476
3477 {
3478 EV_P = w->other;
3479
3480 ev_loop_fork (EV_A);
3481 ev_run (EV_A_ EVRUN_NOWAIT);
3482 }
3483
3484 ev_embed_start (EV_A_ w);
2753} 3485}
2754 3486
2755#if 0 3487#if 0
2756static void 3488static void
2757embed_idle_cb (EV_P_ ev_idle *idle, int revents) 3489embed_idle_cb (EV_P_ ev_idle *idle, int revents)
… …
2765{ 3497{
2766 if (expect_false (ev_is_active (w))) 3498 if (expect_false (ev_is_active (w)))
2767 return; 3499 return;
2768 3500
2769 { 3501 {
2770 struct ev_loop *loop = w->other; 3502 EV_P = w->other;
2771 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 3503 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2772 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 3504 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2773 } 3505 }
2774 3506
2775 EV_FREQUENT_CHECK; 3507 EV_FREQUENT_CHECK;
2776 3508
… …
2779 3511
2780 ev_prepare_init (&w->prepare, embed_prepare_cb); 3512 ev_prepare_init (&w->prepare, embed_prepare_cb);
2781 ev_set_priority (&w->prepare, EV_MINPRI); 3513 ev_set_priority (&w->prepare, EV_MINPRI);
2782 ev_prepare_start (EV_A_ &w->prepare); 3514 ev_prepare_start (EV_A_ &w->prepare);
2783 3515
3516 ev_fork_init (&w->fork, embed_fork_cb);
3517 ev_fork_start (EV_A_ &w->fork);
3518
2784 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 3519 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2785 3520
2786 ev_start (EV_A_ (W)w, 1); 3521 ev_start (EV_A_ (W)w, 1);
2787 3522
2788 EV_FREQUENT_CHECK; 3523 EV_FREQUENT_CHECK;
… …
2795 if (expect_false (!ev_is_active (w))) 3530 if (expect_false (!ev_is_active (w)))
2796 return; 3531 return;
2797 3532
2798 EV_FREQUENT_CHECK; 3533 EV_FREQUENT_CHECK;
2799 3534
2800 ev_io_stop (EV_A_ &w->io); 3535 ev_io_stop (EV_A_ &w->io);
2801 ev_prepare_stop (EV_A_ &w->prepare); 3536 ev_prepare_stop (EV_A_ &w->prepare);
3537 ev_fork_stop (EV_A_ &w->fork);
2802 3538
2803 ev_stop (EV_A_ (W)w); 3539 ev_stop (EV_A_ (W)w);
2804 3540
2805 EV_FREQUENT_CHECK; 3541 EV_FREQUENT_CHECK;
2806} 3542}
… …
2849ev_async_start (EV_P_ ev_async *w) 3585ev_async_start (EV_P_ ev_async *w)
2850{ 3586{
2851 if (expect_false (ev_is_active (w))) 3587 if (expect_false (ev_is_active (w)))
2852 return; 3588 return;
2853 3589
3590 w->sent = 0;
3591
2854 evpipe_init (EV_A); 3592 evpipe_init (EV_A);
2855 3593
2856 EV_FREQUENT_CHECK; 3594 EV_FREQUENT_CHECK;
2857 3595
2858 ev_start (EV_A_ (W)w, ++asynccnt); 3596 ev_start (EV_A_ (W)w, ++asynccnt);
… …
2885 3623
2886void 3624void
2887ev_async_send (EV_P_ ev_async *w) 3625ev_async_send (EV_P_ ev_async *w)
2888{ 3626{
2889 w->sent = 1; 3627 w->sent = 1;
2890 evpipe_write (EV_A_ &gotasync); 3628 evpipe_write (EV_A_ &async_pending);
2891} 3629}
2892#endif 3630#endif
2893 3631
2894/*****************************************************************************/ 3632/*****************************************************************************/
2895 3633
… …
2905once_cb (EV_P_ struct ev_once *once, int revents) 3643once_cb (EV_P_ struct ev_once *once, int revents)
2906{ 3644{
2907 void (*cb)(int revents, void *arg) = once->cb; 3645 void (*cb)(int revents, void *arg) = once->cb;
2908 void *arg = once->arg; 3646 void *arg = once->arg;
2909 3647
2910 ev_io_stop (EV_A_ &once->io); 3648 ev_io_stop (EV_A_ &once->io);
2911 ev_timer_stop (EV_A_ &once->to); 3649 ev_timer_stop (EV_A_ &once->to);
2912 ev_free (once); 3650 ev_free (once);
2913 3651
2914 cb (revents, arg); 3652 cb (revents, arg);
2915} 3653}
2916 3654
2917static void 3655static void
2918once_cb_io (EV_P_ ev_io *w, int revents) 3656once_cb_io (EV_P_ ev_io *w, int revents)
2919{ 3657{
2920 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3658 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3659
3660 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2921} 3661}
2922 3662
2923static void 3663static void
2924once_cb_to (EV_P_ ev_timer *w, int revents) 3664once_cb_to (EV_P_ ev_timer *w, int revents)
2925{ 3665{
2926 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3666 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3667
3668 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2927} 3669}
2928 3670
2929void 3671void
2930ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3672ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2931{ 3673{
2932 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3674 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2933 3675
2934 if (expect_false (!once)) 3676 if (expect_false (!once))
2935 { 3677 {
2936 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3678 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
2937 return; 3679 return;
2938 } 3680 }
2939 3681
2940 once->cb = cb; 3682 once->cb = cb;
2941 once->arg = arg; 3683 once->arg = arg;
… …
2953 ev_timer_set (&once->to, timeout, 0.); 3695 ev_timer_set (&once->to, timeout, 0.);
2954 ev_timer_start (EV_A_ &once->to); 3696 ev_timer_start (EV_A_ &once->to);
2955 } 3697 }
2956} 3698}
2957 3699
3700/*****************************************************************************/
3701
3702#if EV_WALK_ENABLE
3703void
3704ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3705{
3706 int i, j;
3707 ev_watcher_list *wl, *wn;
3708
3709 if (types & (EV_IO | EV_EMBED))
3710 for (i = 0; i < anfdmax; ++i)
3711 for (wl = anfds [i].head; wl; )
3712 {
3713 wn = wl->next;
3714
3715#if EV_EMBED_ENABLE
3716 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3717 {
3718 if (types & EV_EMBED)
3719 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3720 }
3721 else
3722#endif
3723#if EV_USE_INOTIFY
3724 if (ev_cb ((ev_io *)wl) == infy_cb)
3725 ;
3726 else
3727#endif
3728 if ((ev_io *)wl != &pipe_w)
3729 if (types & EV_IO)
3730 cb (EV_A_ EV_IO, wl);
3731
3732 wl = wn;
3733 }
3734
3735 if (types & (EV_TIMER | EV_STAT))
3736 for (i = timercnt + HEAP0; i-- > HEAP0; )
3737#if EV_STAT_ENABLE
3738 /*TODO: timer is not always active*/
3739 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3740 {
3741 if (types & EV_STAT)
3742 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3743 }
3744 else
3745#endif
3746 if (types & EV_TIMER)
3747 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3748
3749#if EV_PERIODIC_ENABLE
3750 if (types & EV_PERIODIC)
3751 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3752 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3753#endif
3754
3755#if EV_IDLE_ENABLE
3756 if (types & EV_IDLE)
3757 for (j = NUMPRI; i--; )
3758 for (i = idlecnt [j]; i--; )
3759 cb (EV_A_ EV_IDLE, idles [j][i]);
3760#endif
3761
3762#if EV_FORK_ENABLE
3763 if (types & EV_FORK)
3764 for (i = forkcnt; i--; )
3765 if (ev_cb (forks [i]) != embed_fork_cb)
3766 cb (EV_A_ EV_FORK, forks [i]);
3767#endif
3768
3769#if EV_ASYNC_ENABLE
3770 if (types & EV_ASYNC)
3771 for (i = asynccnt; i--; )
3772 cb (EV_A_ EV_ASYNC, asyncs [i]);
3773#endif
3774
3775#if EV_PREPARE_ENABLE
3776 if (types & EV_PREPARE)
3777 for (i = preparecnt; i--; )
3778# if EV_EMBED_ENABLE
3779 if (ev_cb (prepares [i]) != embed_prepare_cb)
3780# endif
3781 cb (EV_A_ EV_PREPARE, prepares [i]);
3782#endif
3783
3784#if EV_CHECK_ENABLE
3785 if (types & EV_CHECK)
3786 for (i = checkcnt; i--; )
3787 cb (EV_A_ EV_CHECK, checks [i]);
3788#endif
3789
3790#if EV_SIGNAL_ENABLE
3791 if (types & EV_SIGNAL)
3792 for (i = 0; i < EV_NSIG - 1; ++i)
3793 for (wl = signals [i].head; wl; )
3794 {
3795 wn = wl->next;
3796 cb (EV_A_ EV_SIGNAL, wl);
3797 wl = wn;
3798 }
3799#endif
3800
3801#if EV_CHILD_ENABLE
3802 if (types & EV_CHILD)
3803 for (i = (EV_PID_HASHSIZE); i--; )
3804 for (wl = childs [i]; wl; )
3805 {
3806 wn = wl->next;
3807 cb (EV_A_ EV_CHILD, wl);
3808 wl = wn;
3809 }
3810#endif
3811/* EV_STAT 0x00001000 /* stat data changed */
3812/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3813}
3814#endif
3815
2958#if EV_MULTIPLICITY 3816#if EV_MULTIPLICITY
2959 #include "ev_wrap.h" 3817 #include "ev_wrap.h"
2960#endif 3818#endif
2961 3819
2962#ifdef __cplusplus 3820EV_CPP(})
2963}
2964#endif
2965 3821

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines