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Comparing libev/ev.c (file contents):
Revision 1.101 by root, Sun Nov 11 04:04:23 2007 UTC vs.
Revision 1.339 by root, Tue Mar 16 00:43:22 2010 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
31 39
32#ifdef __cplusplus 40#ifdef __cplusplus
33extern "C" { 41extern "C" {
34#endif 42#endif
35 43
44/* this big block deduces configuration from config.h */
36#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
37# include "config.h" 49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 0
57# endif
58# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1
60# endif
61# endif
62# elif !defined(EV_USE_CLOCK_SYSCALL)
63# define EV_USE_CLOCK_SYSCALL 0
64# endif
38 65
39# if HAVE_CLOCK_GETTIME 66# if HAVE_CLOCK_GETTIME
40# ifndef EV_USE_MONOTONIC 67# ifndef EV_USE_MONOTONIC
41# define EV_USE_MONOTONIC 1 68# define EV_USE_MONOTONIC 1
42# endif 69# endif
43# ifndef EV_USE_REALTIME 70# ifndef EV_USE_REALTIME
44# define EV_USE_REALTIME 1 71# define EV_USE_REALTIME 0
45# endif 72# endif
73# else
74# ifndef EV_USE_MONOTONIC
75# define EV_USE_MONOTONIC 0
46# endif 76# endif
77# ifndef EV_USE_REALTIME
78# define EV_USE_REALTIME 0
79# endif
80# endif
47 81
48# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT) 82# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
84# define EV_USE_NANOSLEEP EV_FEATURE_OS
85# else
86# define EV_USE_NANOSLEEP 0
87# endif
88# endif
89
90# ifndef EV_USE_SELECT
91# if HAVE_SELECT && HAVE_SYS_SELECT_H
92# define EV_USE_SELECT EV_FEATURE_BACKENDS
93# else
49# define EV_USE_SELECT 1 94# define EV_USE_SELECT 0
50# endif 95# endif
96# endif
51 97
52# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL) 98# ifndef EV_USE_POLL
99# if HAVE_POLL && HAVE_POLL_H
100# define EV_USE_POLL EV_FEATURE_BACKENDS
101# else
53# define EV_USE_POLL 1 102# define EV_USE_POLL 0
54# endif 103# endif
55 104# endif
56# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL) 105
106# ifndef EV_USE_EPOLL
107# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
108# define EV_USE_EPOLL EV_FEATURE_BACKENDS
109# else
57# define EV_USE_EPOLL 1 110# define EV_USE_EPOLL 0
58# endif 111# endif
59 112# endif
60# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE) 113
114# ifndef EV_USE_KQUEUE
115# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
116# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
117# else
61# define EV_USE_KQUEUE 1 118# define EV_USE_KQUEUE 0
62# endif 119# endif
120# endif
121
122# ifndef EV_USE_PORT
123# if HAVE_PORT_H && HAVE_PORT_CREATE
124# define EV_USE_PORT EV_FEATURE_BACKENDS
125# else
126# define EV_USE_PORT 0
127# endif
128# endif
63 129
130# ifndef EV_USE_INOTIFY
131# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
132# define EV_USE_INOTIFY EV_FEATURE_OS
133# else
134# define EV_USE_INOTIFY 0
135# endif
136# endif
137
138# ifndef EV_USE_SIGNALFD
139# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
140# define EV_USE_SIGNALFD EV_FEATURE_OS
141# else
142# define EV_USE_SIGNALFD 0
143# endif
144# endif
145
146# ifndef EV_USE_EVENTFD
147# if HAVE_EVENTFD
148# define EV_USE_EVENTFD EV_FEATURE_OS
149# else
150# define EV_USE_EVENTFD 0
151# endif
152# endif
153
64#endif 154#endif
65 155
66#include <math.h> 156#include <math.h>
67#include <stdlib.h> 157#include <stdlib.h>
158#include <string.h>
68#include <fcntl.h> 159#include <fcntl.h>
69#include <stddef.h> 160#include <stddef.h>
70 161
71#include <stdio.h> 162#include <stdio.h>
72 163
73#include <assert.h> 164#include <assert.h>
74#include <errno.h> 165#include <errno.h>
75#include <sys/types.h> 166#include <sys/types.h>
76#include <time.h> 167#include <time.h>
168#include <limits.h>
77 169
78#include <signal.h> 170#include <signal.h>
79
80#ifndef WIN32
81# include <unistd.h>
82# include <sys/time.h>
83# include <sys/wait.h>
84#endif
85/**/
86
87#ifndef EV_USE_MONOTONIC
88# define EV_USE_MONOTONIC 1
89#endif
90
91#ifndef EV_USE_SELECT
92# define EV_USE_SELECT 1
93#endif
94
95#ifndef EV_USE_POLL
96# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
97#endif
98
99#ifndef EV_USE_EPOLL
100# define EV_USE_EPOLL 0
101#endif
102
103#ifndef EV_USE_KQUEUE
104# define EV_USE_KQUEUE 0
105#endif
106
107#ifndef EV_USE_WIN32
108# ifdef WIN32
109# define EV_USE_WIN32 0 /* it does not exist, use select */
110# undef EV_USE_SELECT
111# define EV_USE_SELECT 1
112# else
113# define EV_USE_WIN32 0
114# endif
115#endif
116
117#ifndef EV_USE_REALTIME
118# define EV_USE_REALTIME 1
119#endif
120
121/**/
122
123#ifndef CLOCK_MONOTONIC
124# undef EV_USE_MONOTONIC
125# define EV_USE_MONOTONIC 0
126#endif
127
128#ifndef CLOCK_REALTIME
129# undef EV_USE_REALTIME
130# define EV_USE_REALTIME 0
131#endif
132
133/**/
134
135#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
136#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
137#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
138/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
139 171
140#ifdef EV_H 172#ifdef EV_H
141# include EV_H 173# include EV_H
142#else 174#else
143# include "ev.h" 175# include "ev.h"
144#endif 176#endif
145 177
178#ifndef _WIN32
179# include <sys/time.h>
180# include <sys/wait.h>
181# include <unistd.h>
182#else
183# include <io.h>
184# define WIN32_LEAN_AND_MEAN
185# include <windows.h>
186# ifndef EV_SELECT_IS_WINSOCKET
187# define EV_SELECT_IS_WINSOCKET 1
188# endif
189# undef EV_AVOID_STDIO
190#endif
191
192/* this block tries to deduce configuration from header-defined symbols and defaults */
193
194/* try to deduce the maximum number of signals on this platform */
195#if defined (EV_NSIG)
196/* use what's provided */
197#elif defined (NSIG)
198# define EV_NSIG (NSIG)
199#elif defined(_NSIG)
200# define EV_NSIG (_NSIG)
201#elif defined (SIGMAX)
202# define EV_NSIG (SIGMAX+1)
203#elif defined (SIG_MAX)
204# define EV_NSIG (SIG_MAX+1)
205#elif defined (_SIG_MAX)
206# define EV_NSIG (_SIG_MAX+1)
207#elif defined (MAXSIG)
208# define EV_NSIG (MAXSIG+1)
209#elif defined (MAX_SIG)
210# define EV_NSIG (MAX_SIG+1)
211#elif defined (SIGARRAYSIZE)
212# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
213#elif defined (_sys_nsig)
214# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
215#else
216# error "unable to find value for NSIG, please report"
217/* to make it compile regardless, just remove the above line, */
218/* but consider reporting it, too! :) */
219# define EV_NSIG 65
220#endif
221
222#ifndef EV_USE_CLOCK_SYSCALL
223# if __linux && __GLIBC__ >= 2
224# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
225# else
226# define EV_USE_CLOCK_SYSCALL 0
227# endif
228#endif
229
230#ifndef EV_USE_MONOTONIC
231# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
232# define EV_USE_MONOTONIC EV_FEATURE_OS
233# else
234# define EV_USE_MONOTONIC 0
235# endif
236#endif
237
238#ifndef EV_USE_REALTIME
239# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
240#endif
241
242#ifndef EV_USE_NANOSLEEP
243# if _POSIX_C_SOURCE >= 199309L
244# define EV_USE_NANOSLEEP EV_FEATURE_OS
245# else
246# define EV_USE_NANOSLEEP 0
247# endif
248#endif
249
250#ifndef EV_USE_SELECT
251# define EV_USE_SELECT EV_FEATURE_BACKENDS
252#endif
253
254#ifndef EV_USE_POLL
255# ifdef _WIN32
256# define EV_USE_POLL 0
257# else
258# define EV_USE_POLL EV_FEATURE_BACKENDS
259# endif
260#endif
261
262#ifndef EV_USE_EPOLL
263# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
264# define EV_USE_EPOLL EV_FEATURE_BACKENDS
265# else
266# define EV_USE_EPOLL 0
267# endif
268#endif
269
270#ifndef EV_USE_KQUEUE
271# define EV_USE_KQUEUE 0
272#endif
273
274#ifndef EV_USE_PORT
275# define EV_USE_PORT 0
276#endif
277
278#ifndef EV_USE_INOTIFY
279# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
280# define EV_USE_INOTIFY EV_FEATURE_OS
281# else
282# define EV_USE_INOTIFY 0
283# endif
284#endif
285
286#ifndef EV_PID_HASHSIZE
287# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
288#endif
289
290#ifndef EV_INOTIFY_HASHSIZE
291# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
292#endif
293
294#ifndef EV_USE_EVENTFD
295# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
296# define EV_USE_EVENTFD EV_FEATURE_OS
297# else
298# define EV_USE_EVENTFD 0
299# endif
300#endif
301
302#ifndef EV_USE_SIGNALFD
303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
304# define EV_USE_SIGNALFD EV_FEATURE_OS
305# else
306# define EV_USE_SIGNALFD 0
307# endif
308#endif
309
310#if 0 /* debugging */
311# define EV_VERIFY 3
312# define EV_USE_4HEAP 1
313# define EV_HEAP_CACHE_AT 1
314#endif
315
316#ifndef EV_VERIFY
317# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
318#endif
319
320#ifndef EV_USE_4HEAP
321# define EV_USE_4HEAP EV_FEATURE_DATA
322#endif
323
324#ifndef EV_HEAP_CACHE_AT
325# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
326#endif
327
328/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
329/* which makes programs even slower. might work on other unices, too. */
330#if EV_USE_CLOCK_SYSCALL
331# include <syscall.h>
332# ifdef SYS_clock_gettime
333# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
334# undef EV_USE_MONOTONIC
335# define EV_USE_MONOTONIC 1
336# else
337# undef EV_USE_CLOCK_SYSCALL
338# define EV_USE_CLOCK_SYSCALL 0
339# endif
340#endif
341
342/* this block fixes any misconfiguration where we know we run into trouble otherwise */
343
344#ifdef _AIX
345/* AIX has a completely broken poll.h header */
346# undef EV_USE_POLL
347# define EV_USE_POLL 0
348#endif
349
350#ifndef CLOCK_MONOTONIC
351# undef EV_USE_MONOTONIC
352# define EV_USE_MONOTONIC 0
353#endif
354
355#ifndef CLOCK_REALTIME
356# undef EV_USE_REALTIME
357# define EV_USE_REALTIME 0
358#endif
359
360#if !EV_STAT_ENABLE
361# undef EV_USE_INOTIFY
362# define EV_USE_INOTIFY 0
363#endif
364
365#if !EV_USE_NANOSLEEP
366# ifndef _WIN32
367# include <sys/select.h>
368# endif
369#endif
370
371#if EV_USE_INOTIFY
372# include <sys/utsname.h>
373# include <sys/statfs.h>
374# include <sys/inotify.h>
375/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
376# ifndef IN_DONT_FOLLOW
377# undef EV_USE_INOTIFY
378# define EV_USE_INOTIFY 0
379# endif
380#endif
381
382#if EV_SELECT_IS_WINSOCKET
383# include <winsock.h>
384#endif
385
386#if EV_USE_EVENTFD
387/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
388# include <stdint.h>
389# ifndef EFD_NONBLOCK
390# define EFD_NONBLOCK O_NONBLOCK
391# endif
392# ifndef EFD_CLOEXEC
393# ifdef O_CLOEXEC
394# define EFD_CLOEXEC O_CLOEXEC
395# else
396# define EFD_CLOEXEC 02000000
397# endif
398# endif
399# ifdef __cplusplus
400extern "C" {
401# endif
402int (eventfd) (unsigned int initval, int flags);
403# ifdef __cplusplus
404}
405# endif
406#endif
407
408#if EV_USE_SIGNALFD
409/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
410# include <stdint.h>
411# ifndef SFD_NONBLOCK
412# define SFD_NONBLOCK O_NONBLOCK
413# endif
414# ifndef SFD_CLOEXEC
415# ifdef O_CLOEXEC
416# define SFD_CLOEXEC O_CLOEXEC
417# else
418# define SFD_CLOEXEC 02000000
419# endif
420# endif
421# ifdef __cplusplus
422extern "C" {
423# endif
424int signalfd (int fd, const sigset_t *mask, int flags);
425
426struct signalfd_siginfo
427{
428 uint32_t ssi_signo;
429 char pad[128 - sizeof (uint32_t)];
430};
431# ifdef __cplusplus
432}
433# endif
434#endif
435
436
437/**/
438
439#if EV_VERIFY >= 3
440# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
441#else
442# define EV_FREQUENT_CHECK do { } while (0)
443#endif
444
445/*
446 * This is used to avoid floating point rounding problems.
447 * It is added to ev_rt_now when scheduling periodics
448 * to ensure progress, time-wise, even when rounding
449 * errors are against us.
450 * This value is good at least till the year 4000.
451 * Better solutions welcome.
452 */
453#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
454
455#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
456#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
457
146#if __GNUC__ >= 3 458#if __GNUC__ >= 4
147# define expect(expr,value) __builtin_expect ((expr),(value)) 459# define expect(expr,value) __builtin_expect ((expr),(value))
148# define inline inline 460# define noinline __attribute__ ((noinline))
149#else 461#else
150# define expect(expr,value) (expr) 462# define expect(expr,value) (expr)
151# define inline static 463# define noinline
464# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
465# define inline
466# endif
152#endif 467#endif
153 468
154#define expect_false(expr) expect ((expr) != 0, 0) 469#define expect_false(expr) expect ((expr) != 0, 0)
155#define expect_true(expr) expect ((expr) != 0, 1) 470#define expect_true(expr) expect ((expr) != 0, 1)
471#define inline_size static inline
156 472
473#if EV_FEATURE_CODE
474# define inline_speed static inline
475#else
476# define inline_speed static noinline
477#endif
478
157#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 479#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
480
481#if EV_MINPRI == EV_MAXPRI
482# define ABSPRI(w) (((W)w), 0)
483#else
158#define ABSPRI(w) ((w)->priority - EV_MINPRI) 484# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
485#endif
159 486
487#define EMPTY /* required for microsofts broken pseudo-c compiler */
488#define EMPTY2(a,b) /* used to suppress some warnings */
489
160typedef struct ev_watcher *W; 490typedef ev_watcher *W;
161typedef struct ev_watcher_list *WL; 491typedef ev_watcher_list *WL;
162typedef struct ev_watcher_time *WT; 492typedef ev_watcher_time *WT;
163 493
494#define ev_active(w) ((W)(w))->active
495#define ev_at(w) ((WT)(w))->at
496
497#if EV_USE_REALTIME
498/* sig_atomic_t is used to avoid per-thread variables or locking but still */
499/* giving it a reasonably high chance of working on typical architetcures */
500static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
501#endif
502
503#if EV_USE_MONOTONIC
164static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 504static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
505#endif
165 506
507#ifndef EV_FD_TO_WIN32_HANDLE
508# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
509#endif
510#ifndef EV_WIN32_HANDLE_TO_FD
511# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
512#endif
513#ifndef EV_WIN32_CLOSE_FD
514# define EV_WIN32_CLOSE_FD(fd) close (fd)
515#endif
516
166#ifdef WIN32 517#ifdef _WIN32
167# include "ev_win32.c" 518# include "ev_win32.c"
168#endif 519#endif
169 520
170/*****************************************************************************/ 521/*****************************************************************************/
171 522
523#if EV_AVOID_STDIO
524static void noinline
525ev_printerr (const char *msg)
526{
527 write (STDERR_FILENO, msg, strlen (msg));
528}
529#endif
530
172static void (*syserr_cb)(const char *msg); 531static void (*syserr_cb)(const char *msg);
173 532
533void
174void ev_set_syserr_cb (void (*cb)(const char *msg)) 534ev_set_syserr_cb (void (*cb)(const char *msg))
175{ 535{
176 syserr_cb = cb; 536 syserr_cb = cb;
177} 537}
178 538
179static void 539static void noinline
180syserr (const char *msg) 540ev_syserr (const char *msg)
181{ 541{
182 if (!msg) 542 if (!msg)
183 msg = "(libev) system error"; 543 msg = "(libev) system error";
184 544
185 if (syserr_cb) 545 if (syserr_cb)
186 syserr_cb (msg); 546 syserr_cb (msg);
187 else 547 else
188 { 548 {
549#if EV_AVOID_STDIO
550 const char *err = strerror (errno);
551
552 ev_printerr (msg);
553 ev_printerr (": ");
554 ev_printerr (err);
555 ev_printerr ("\n");
556#else
189 perror (msg); 557 perror (msg);
558#endif
190 abort (); 559 abort ();
191 } 560 }
192} 561}
193 562
563static void *
564ev_realloc_emul (void *ptr, long size)
565{
566#if __GLIBC__
567 return realloc (ptr, size);
568#else
569 /* some systems, notably openbsd and darwin, fail to properly
570 * implement realloc (x, 0) (as required by both ansi c-89 and
571 * the single unix specification, so work around them here.
572 */
573
574 if (size)
575 return realloc (ptr, size);
576
577 free (ptr);
578 return 0;
579#endif
580}
581
194static void *(*alloc)(void *ptr, long size); 582static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
195 583
584void
196void ev_set_allocator (void *(*cb)(void *ptr, long size)) 585ev_set_allocator (void *(*cb)(void *ptr, long size))
197{ 586{
198 alloc = cb; 587 alloc = cb;
199} 588}
200 589
201static void * 590inline_speed void *
202ev_realloc (void *ptr, long size) 591ev_realloc (void *ptr, long size)
203{ 592{
204 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 593 ptr = alloc (ptr, size);
205 594
206 if (!ptr && size) 595 if (!ptr && size)
207 { 596 {
597#if EV_AVOID_STDIO
598 ev_printerr ("libev: memory allocation failed, aborting.\n");
599#else
208 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 600 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
601#endif
209 abort (); 602 abort ();
210 } 603 }
211 604
212 return ptr; 605 return ptr;
213} 606}
… …
215#define ev_malloc(size) ev_realloc (0, (size)) 608#define ev_malloc(size) ev_realloc (0, (size))
216#define ev_free(ptr) ev_realloc ((ptr), 0) 609#define ev_free(ptr) ev_realloc ((ptr), 0)
217 610
218/*****************************************************************************/ 611/*****************************************************************************/
219 612
613/* set in reify when reification needed */
614#define EV_ANFD_REIFY 1
615
616/* file descriptor info structure */
220typedef struct 617typedef struct
221{ 618{
222 WL head; 619 WL head;
223 unsigned char events; 620 unsigned char events; /* the events watched for */
621 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
622 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
224 unsigned char reify; 623 unsigned char unused;
624#if EV_USE_EPOLL
625 unsigned int egen; /* generation counter to counter epoll bugs */
626#endif
627#if EV_SELECT_IS_WINSOCKET
628 SOCKET handle;
629#endif
225} ANFD; 630} ANFD;
226 631
632/* stores the pending event set for a given watcher */
227typedef struct 633typedef struct
228{ 634{
229 W w; 635 W w;
230 int events; 636 int events; /* the pending event set for the given watcher */
231} ANPENDING; 637} ANPENDING;
638
639#if EV_USE_INOTIFY
640/* hash table entry per inotify-id */
641typedef struct
642{
643 WL head;
644} ANFS;
645#endif
646
647/* Heap Entry */
648#if EV_HEAP_CACHE_AT
649 /* a heap element */
650 typedef struct {
651 ev_tstamp at;
652 WT w;
653 } ANHE;
654
655 #define ANHE_w(he) (he).w /* access watcher, read-write */
656 #define ANHE_at(he) (he).at /* access cached at, read-only */
657 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
658#else
659 /* a heap element */
660 typedef WT ANHE;
661
662 #define ANHE_w(he) (he)
663 #define ANHE_at(he) (he)->at
664 #define ANHE_at_cache(he)
665#endif
232 666
233#if EV_MULTIPLICITY 667#if EV_MULTIPLICITY
234 668
235 struct ev_loop 669 struct ev_loop
236 { 670 {
… …
240 #include "ev_vars.h" 674 #include "ev_vars.h"
241 #undef VAR 675 #undef VAR
242 }; 676 };
243 #include "ev_wrap.h" 677 #include "ev_wrap.h"
244 678
245 struct ev_loop default_loop_struct; 679 static struct ev_loop default_loop_struct;
246 static struct ev_loop *default_loop; 680 struct ev_loop *ev_default_loop_ptr;
247 681
248#else 682#else
249 683
250 ev_tstamp ev_rt_now; 684 ev_tstamp ev_rt_now;
251 #define VAR(name,decl) static decl; 685 #define VAR(name,decl) static decl;
252 #include "ev_vars.h" 686 #include "ev_vars.h"
253 #undef VAR 687 #undef VAR
254 688
255 static int default_loop; 689 static int ev_default_loop_ptr;
256 690
257#endif 691#endif
692
693#if EV_FEATURE_API
694# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
695# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
696# define EV_INVOKE_PENDING invoke_cb (EV_A)
697#else
698# define EV_RELEASE_CB (void)0
699# define EV_ACQUIRE_CB (void)0
700# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
701#endif
702
703#define EVUNLOOP_RECURSE 0x80
258 704
259/*****************************************************************************/ 705/*****************************************************************************/
260 706
707#ifndef EV_HAVE_EV_TIME
261ev_tstamp 708ev_tstamp
262ev_time (void) 709ev_time (void)
263{ 710{
264#if EV_USE_REALTIME 711#if EV_USE_REALTIME
712 if (expect_true (have_realtime))
713 {
265 struct timespec ts; 714 struct timespec ts;
266 clock_gettime (CLOCK_REALTIME, &ts); 715 clock_gettime (CLOCK_REALTIME, &ts);
267 return ts.tv_sec + ts.tv_nsec * 1e-9; 716 return ts.tv_sec + ts.tv_nsec * 1e-9;
268#else 717 }
718#endif
719
269 struct timeval tv; 720 struct timeval tv;
270 gettimeofday (&tv, 0); 721 gettimeofday (&tv, 0);
271 return tv.tv_sec + tv.tv_usec * 1e-6; 722 return tv.tv_sec + tv.tv_usec * 1e-6;
272#endif
273} 723}
724#endif
274 725
275inline ev_tstamp 726inline_size ev_tstamp
276get_clock (void) 727get_clock (void)
277{ 728{
278#if EV_USE_MONOTONIC 729#if EV_USE_MONOTONIC
279 if (expect_true (have_monotonic)) 730 if (expect_true (have_monotonic))
280 { 731 {
… …
293{ 744{
294 return ev_rt_now; 745 return ev_rt_now;
295} 746}
296#endif 747#endif
297 748
298#define array_roundsize(type,n) ((n) | 4 & ~3) 749void
750ev_sleep (ev_tstamp delay)
751{
752 if (delay > 0.)
753 {
754#if EV_USE_NANOSLEEP
755 struct timespec ts;
756
757 ts.tv_sec = (time_t)delay;
758 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
759
760 nanosleep (&ts, 0);
761#elif defined(_WIN32)
762 Sleep ((unsigned long)(delay * 1e3));
763#else
764 struct timeval tv;
765
766 tv.tv_sec = (time_t)delay;
767 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
768
769 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
770 /* something not guaranteed by newer posix versions, but guaranteed */
771 /* by older ones */
772 select (0, 0, 0, 0, &tv);
773#endif
774 }
775}
776
777/*****************************************************************************/
778
779#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
780
781/* find a suitable new size for the given array, */
782/* hopefully by rounding to a ncie-to-malloc size */
783inline_size int
784array_nextsize (int elem, int cur, int cnt)
785{
786 int ncur = cur + 1;
787
788 do
789 ncur <<= 1;
790 while (cnt > ncur);
791
792 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
793 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
794 {
795 ncur *= elem;
796 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
797 ncur = ncur - sizeof (void *) * 4;
798 ncur /= elem;
799 }
800
801 return ncur;
802}
803
804static noinline void *
805array_realloc (int elem, void *base, int *cur, int cnt)
806{
807 *cur = array_nextsize (elem, *cur, cnt);
808 return ev_realloc (base, elem * *cur);
809}
810
811#define array_init_zero(base,count) \
812 memset ((void *)(base), 0, sizeof (*(base)) * (count))
299 813
300#define array_needsize(type,base,cur,cnt,init) \ 814#define array_needsize(type,base,cur,cnt,init) \
301 if (expect_false ((cnt) > cur)) \ 815 if (expect_false ((cnt) > (cur))) \
302 { \ 816 { \
303 int newcnt = cur; \ 817 int ocur_ = (cur); \
304 do \ 818 (base) = (type *)array_realloc \
305 { \ 819 (sizeof (type), (base), &(cur), (cnt)); \
306 newcnt = array_roundsize (type, newcnt << 1); \ 820 init ((base) + (ocur_), (cur) - ocur_); \
307 } \
308 while ((cnt) > newcnt); \
309 \
310 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
311 init (base + cur, newcnt - cur); \
312 cur = newcnt; \
313 } 821 }
314 822
823#if 0
315#define array_slim(type,stem) \ 824#define array_slim(type,stem) \
316 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 825 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
317 { \ 826 { \
318 stem ## max = array_roundsize (stem ## cnt >> 1); \ 827 stem ## max = array_roundsize (stem ## cnt >> 1); \
319 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 828 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
320 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 829 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
321 } 830 }
322 831#endif
323/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
324/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
325#define array_free_microshit(stem) \
326 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
327 832
328#define array_free(stem, idx) \ 833#define array_free(stem, idx) \
329 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 834 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
330 835
331/*****************************************************************************/ 836/*****************************************************************************/
332 837
333static void 838/* dummy callback for pending events */
334anfds_init (ANFD *base, int count) 839static void noinline
840pendingcb (EV_P_ ev_prepare *w, int revents)
335{ 841{
336 while (count--)
337 {
338 base->head = 0;
339 base->events = EV_NONE;
340 base->reify = 0;
341
342 ++base;
343 }
344} 842}
345 843
346void 844void noinline
347ev_feed_event (EV_P_ void *w, int revents) 845ev_feed_event (EV_P_ void *w, int revents)
348{ 846{
349 W w_ = (W)w; 847 W w_ = (W)w;
848 int pri = ABSPRI (w_);
350 849
351 if (w_->pending) 850 if (expect_false (w_->pending))
851 pendings [pri][w_->pending - 1].events |= revents;
852 else
352 { 853 {
854 w_->pending = ++pendingcnt [pri];
855 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
856 pendings [pri][w_->pending - 1].w = w_;
353 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 857 pendings [pri][w_->pending - 1].events = revents;
354 return;
355 } 858 }
356
357 w_->pending = ++pendingcnt [ABSPRI (w_)];
358 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
359 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
360 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
361} 859}
362 860
363static void 861inline_speed void
862feed_reverse (EV_P_ W w)
863{
864 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
865 rfeeds [rfeedcnt++] = w;
866}
867
868inline_size void
869feed_reverse_done (EV_P_ int revents)
870{
871 do
872 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
873 while (rfeedcnt);
874}
875
876inline_speed void
364queue_events (EV_P_ W *events, int eventcnt, int type) 877queue_events (EV_P_ W *events, int eventcnt, int type)
365{ 878{
366 int i; 879 int i;
367 880
368 for (i = 0; i < eventcnt; ++i) 881 for (i = 0; i < eventcnt; ++i)
369 ev_feed_event (EV_A_ events [i], type); 882 ev_feed_event (EV_A_ events [i], type);
370} 883}
371 884
885/*****************************************************************************/
886
372inline void 887inline_speed void
373fd_event (EV_P_ int fd, int revents) 888fd_event_nocheck (EV_P_ int fd, int revents)
374{ 889{
375 ANFD *anfd = anfds + fd; 890 ANFD *anfd = anfds + fd;
376 struct ev_io *w; 891 ev_io *w;
377 892
378 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 893 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
379 { 894 {
380 int ev = w->events & revents; 895 int ev = w->events & revents;
381 896
382 if (ev) 897 if (ev)
383 ev_feed_event (EV_A_ (W)w, ev); 898 ev_feed_event (EV_A_ (W)w, ev);
384 } 899 }
385} 900}
386 901
902/* do not submit kernel events for fds that have reify set */
903/* because that means they changed while we were polling for new events */
904inline_speed void
905fd_event (EV_P_ int fd, int revents)
906{
907 ANFD *anfd = anfds + fd;
908
909 if (expect_true (!anfd->reify))
910 fd_event_nocheck (EV_A_ fd, revents);
911}
912
387void 913void
388ev_feed_fd_event (EV_P_ int fd, int revents) 914ev_feed_fd_event (EV_P_ int fd, int revents)
389{ 915{
916 if (fd >= 0 && fd < anfdmax)
390 fd_event (EV_A_ fd, revents); 917 fd_event_nocheck (EV_A_ fd, revents);
391} 918}
392 919
393/*****************************************************************************/ 920/* make sure the external fd watch events are in-sync */
394 921/* with the kernel/libev internal state */
395static void 922inline_size void
396fd_reify (EV_P) 923fd_reify (EV_P)
397{ 924{
398 int i; 925 int i;
399 926
400 for (i = 0; i < fdchangecnt; ++i) 927 for (i = 0; i < fdchangecnt; ++i)
401 { 928 {
402 int fd = fdchanges [i]; 929 int fd = fdchanges [i];
403 ANFD *anfd = anfds + fd; 930 ANFD *anfd = anfds + fd;
404 struct ev_io *w; 931 ev_io *w;
405 932
406 int events = 0; 933 unsigned char events = 0;
407 934
408 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 935 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
409 events |= w->events; 936 events |= (unsigned char)w->events;
410 937
938#if EV_SELECT_IS_WINSOCKET
939 if (events)
940 {
941 unsigned long arg;
942 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
943 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
944 }
945#endif
946
947 {
948 unsigned char o_events = anfd->events;
949 unsigned char o_reify = anfd->reify;
950
411 anfd->reify = 0; 951 anfd->reify = 0;
412
413 method_modify (EV_A_ fd, anfd->events, events);
414 anfd->events = events; 952 anfd->events = events;
953
954 if (o_events != events || o_reify & EV__IOFDSET)
955 backend_modify (EV_A_ fd, o_events, events);
956 }
415 } 957 }
416 958
417 fdchangecnt = 0; 959 fdchangecnt = 0;
418} 960}
419 961
420static void 962/* something about the given fd changed */
963inline_size void
421fd_change (EV_P_ int fd) 964fd_change (EV_P_ int fd, int flags)
422{ 965{
423 if (anfds [fd].reify) 966 unsigned char reify = anfds [fd].reify;
424 return;
425
426 anfds [fd].reify = 1; 967 anfds [fd].reify |= flags;
427 968
969 if (expect_true (!reify))
970 {
428 ++fdchangecnt; 971 ++fdchangecnt;
429 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); 972 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
430 fdchanges [fdchangecnt - 1] = fd; 973 fdchanges [fdchangecnt - 1] = fd;
974 }
431} 975}
432 976
433static void 977/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
978inline_speed void
434fd_kill (EV_P_ int fd) 979fd_kill (EV_P_ int fd)
435{ 980{
436 struct ev_io *w; 981 ev_io *w;
437 982
438 while ((w = (struct ev_io *)anfds [fd].head)) 983 while ((w = (ev_io *)anfds [fd].head))
439 { 984 {
440 ev_io_stop (EV_A_ w); 985 ev_io_stop (EV_A_ w);
441 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 986 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
442 } 987 }
443} 988}
444 989
445static int 990/* check whether the given fd is actually valid, for error recovery */
991inline_size int
446fd_valid (int fd) 992fd_valid (int fd)
447{ 993{
448#ifdef WIN32 994#ifdef _WIN32
449 return !!win32_get_osfhandle (fd); 995 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
450#else 996#else
451 return fcntl (fd, F_GETFD) != -1; 997 return fcntl (fd, F_GETFD) != -1;
452#endif 998#endif
453} 999}
454 1000
455/* called on EBADF to verify fds */ 1001/* called on EBADF to verify fds */
456static void 1002static void noinline
457fd_ebadf (EV_P) 1003fd_ebadf (EV_P)
458{ 1004{
459 int fd; 1005 int fd;
460 1006
461 for (fd = 0; fd < anfdmax; ++fd) 1007 for (fd = 0; fd < anfdmax; ++fd)
462 if (anfds [fd].events) 1008 if (anfds [fd].events)
463 if (!fd_valid (fd) == -1 && errno == EBADF) 1009 if (!fd_valid (fd) && errno == EBADF)
464 fd_kill (EV_A_ fd); 1010 fd_kill (EV_A_ fd);
465} 1011}
466 1012
467/* called on ENOMEM in select/poll to kill some fds and retry */ 1013/* called on ENOMEM in select/poll to kill some fds and retry */
468static void 1014static void noinline
469fd_enomem (EV_P) 1015fd_enomem (EV_P)
470{ 1016{
471 int fd; 1017 int fd;
472 1018
473 for (fd = anfdmax; fd--; ) 1019 for (fd = anfdmax; fd--; )
474 if (anfds [fd].events) 1020 if (anfds [fd].events)
475 { 1021 {
476 fd_kill (EV_A_ fd); 1022 fd_kill (EV_A_ fd);
477 return; 1023 break;
478 } 1024 }
479} 1025}
480 1026
481/* usually called after fork if method needs to re-arm all fds from scratch */ 1027/* usually called after fork if backend needs to re-arm all fds from scratch */
482static void 1028static void noinline
483fd_rearm_all (EV_P) 1029fd_rearm_all (EV_P)
484{ 1030{
485 int fd; 1031 int fd;
486 1032
487 /* this should be highly optimised to not do anything but set a flag */
488 for (fd = 0; fd < anfdmax; ++fd) 1033 for (fd = 0; fd < anfdmax; ++fd)
489 if (anfds [fd].events) 1034 if (anfds [fd].events)
490 { 1035 {
491 anfds [fd].events = 0; 1036 anfds [fd].events = 0;
492 fd_change (EV_A_ fd); 1037 anfds [fd].emask = 0;
1038 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
493 } 1039 }
494} 1040}
495 1041
1042/* used to prepare libev internal fd's */
1043/* this is not fork-safe */
1044inline_speed void
1045fd_intern (int fd)
1046{
1047#ifdef _WIN32
1048 unsigned long arg = 1;
1049 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1050#else
1051 fcntl (fd, F_SETFD, FD_CLOEXEC);
1052 fcntl (fd, F_SETFL, O_NONBLOCK);
1053#endif
1054}
1055
496/*****************************************************************************/ 1056/*****************************************************************************/
497 1057
1058/*
1059 * the heap functions want a real array index. array index 0 uis guaranteed to not
1060 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1061 * the branching factor of the d-tree.
1062 */
1063
1064/*
1065 * at the moment we allow libev the luxury of two heaps,
1066 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1067 * which is more cache-efficient.
1068 * the difference is about 5% with 50000+ watchers.
1069 */
1070#if EV_USE_4HEAP
1071
1072#define DHEAP 4
1073#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1074#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1075#define UPHEAP_DONE(p,k) ((p) == (k))
1076
1077/* away from the root */
1078inline_speed void
1079downheap (ANHE *heap, int N, int k)
1080{
1081 ANHE he = heap [k];
1082 ANHE *E = heap + N + HEAP0;
1083
1084 for (;;)
1085 {
1086 ev_tstamp minat;
1087 ANHE *minpos;
1088 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1089
1090 /* find minimum child */
1091 if (expect_true (pos + DHEAP - 1 < E))
1092 {
1093 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1094 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1095 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1096 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1097 }
1098 else if (pos < E)
1099 {
1100 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1101 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1102 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1103 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1104 }
1105 else
1106 break;
1107
1108 if (ANHE_at (he) <= minat)
1109 break;
1110
1111 heap [k] = *minpos;
1112 ev_active (ANHE_w (*minpos)) = k;
1113
1114 k = minpos - heap;
1115 }
1116
1117 heap [k] = he;
1118 ev_active (ANHE_w (he)) = k;
1119}
1120
1121#else /* 4HEAP */
1122
1123#define HEAP0 1
1124#define HPARENT(k) ((k) >> 1)
1125#define UPHEAP_DONE(p,k) (!(p))
1126
1127/* away from the root */
1128inline_speed void
1129downheap (ANHE *heap, int N, int k)
1130{
1131 ANHE he = heap [k];
1132
1133 for (;;)
1134 {
1135 int c = k << 1;
1136
1137 if (c >= N + HEAP0)
1138 break;
1139
1140 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1141 ? 1 : 0;
1142
1143 if (ANHE_at (he) <= ANHE_at (heap [c]))
1144 break;
1145
1146 heap [k] = heap [c];
1147 ev_active (ANHE_w (heap [k])) = k;
1148
1149 k = c;
1150 }
1151
1152 heap [k] = he;
1153 ev_active (ANHE_w (he)) = k;
1154}
1155#endif
1156
1157/* towards the root */
1158inline_speed void
1159upheap (ANHE *heap, int k)
1160{
1161 ANHE he = heap [k];
1162
1163 for (;;)
1164 {
1165 int p = HPARENT (k);
1166
1167 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1168 break;
1169
1170 heap [k] = heap [p];
1171 ev_active (ANHE_w (heap [k])) = k;
1172 k = p;
1173 }
1174
1175 heap [k] = he;
1176 ev_active (ANHE_w (he)) = k;
1177}
1178
1179/* move an element suitably so it is in a correct place */
1180inline_size void
1181adjustheap (ANHE *heap, int N, int k)
1182{
1183 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1184 upheap (heap, k);
1185 else
1186 downheap (heap, N, k);
1187}
1188
1189/* rebuild the heap: this function is used only once and executed rarely */
1190inline_size void
1191reheap (ANHE *heap, int N)
1192{
1193 int i;
1194
1195 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1196 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1197 for (i = 0; i < N; ++i)
1198 upheap (heap, i + HEAP0);
1199}
1200
1201/*****************************************************************************/
1202
1203/* associate signal watchers to a signal signal */
1204typedef struct
1205{
1206 EV_ATOMIC_T pending;
1207#if EV_MULTIPLICITY
1208 EV_P;
1209#endif
1210 WL head;
1211} ANSIG;
1212
1213static ANSIG signals [EV_NSIG - 1];
1214
1215/*****************************************************************************/
1216
1217#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1218
1219static void noinline
1220evpipe_init (EV_P)
1221{
1222 if (!ev_is_active (&pipe_w))
1223 {
1224# if EV_USE_EVENTFD
1225 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1226 if (evfd < 0 && errno == EINVAL)
1227 evfd = eventfd (0, 0);
1228
1229 if (evfd >= 0)
1230 {
1231 evpipe [0] = -1;
1232 fd_intern (evfd); /* doing it twice doesn't hurt */
1233 ev_io_set (&pipe_w, evfd, EV_READ);
1234 }
1235 else
1236# endif
1237 {
1238 while (pipe (evpipe))
1239 ev_syserr ("(libev) error creating signal/async pipe");
1240
1241 fd_intern (evpipe [0]);
1242 fd_intern (evpipe [1]);
1243 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1244 }
1245
1246 ev_io_start (EV_A_ &pipe_w);
1247 ev_unref (EV_A); /* watcher should not keep loop alive */
1248 }
1249}
1250
1251inline_size void
1252evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1253{
1254 if (!*flag)
1255 {
1256 int old_errno = errno; /* save errno because write might clobber it */
1257 char dummy;
1258
1259 *flag = 1;
1260
1261#if EV_USE_EVENTFD
1262 if (evfd >= 0)
1263 {
1264 uint64_t counter = 1;
1265 write (evfd, &counter, sizeof (uint64_t));
1266 }
1267 else
1268#endif
1269 write (evpipe [1], &dummy, 1);
1270
1271 errno = old_errno;
1272 }
1273}
1274
1275/* called whenever the libev signal pipe */
1276/* got some events (signal, async) */
498static void 1277static void
499upheap (WT *heap, int k) 1278pipecb (EV_P_ ev_io *iow, int revents)
500{ 1279{
501 WT w = heap [k]; 1280 int i;
502 1281
503 while (k && heap [k >> 1]->at > w->at) 1282#if EV_USE_EVENTFD
504 { 1283 if (evfd >= 0)
505 heap [k] = heap [k >> 1];
506 ((W)heap [k])->active = k + 1;
507 k >>= 1;
508 } 1284 {
1285 uint64_t counter;
1286 read (evfd, &counter, sizeof (uint64_t));
1287 }
1288 else
1289#endif
1290 {
1291 char dummy;
1292 read (evpipe [0], &dummy, 1);
1293 }
509 1294
510 heap [k] = w; 1295 if (sig_pending)
511 ((W)heap [k])->active = k + 1; 1296 {
1297 sig_pending = 0;
512 1298
1299 for (i = EV_NSIG - 1; i--; )
1300 if (expect_false (signals [i].pending))
1301 ev_feed_signal_event (EV_A_ i + 1);
1302 }
1303
1304#if EV_ASYNC_ENABLE
1305 if (async_pending)
1306 {
1307 async_pending = 0;
1308
1309 for (i = asynccnt; i--; )
1310 if (asyncs [i]->sent)
1311 {
1312 asyncs [i]->sent = 0;
1313 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1314 }
1315 }
1316#endif
513} 1317}
1318
1319/*****************************************************************************/
514 1320
515static void 1321static void
516downheap (WT *heap, int N, int k)
517{
518 WT w = heap [k];
519
520 while (k < (N >> 1))
521 {
522 int j = k << 1;
523
524 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
525 ++j;
526
527 if (w->at <= heap [j]->at)
528 break;
529
530 heap [k] = heap [j];
531 ((W)heap [k])->active = k + 1;
532 k = j;
533 }
534
535 heap [k] = w;
536 ((W)heap [k])->active = k + 1;
537}
538
539inline void
540adjustheap (WT *heap, int N, int k)
541{
542 upheap (heap, k);
543 downheap (heap, N, k);
544}
545
546/*****************************************************************************/
547
548typedef struct
549{
550 WL head;
551 sig_atomic_t volatile gotsig;
552} ANSIG;
553
554static ANSIG *signals;
555static int signalmax;
556
557static int sigpipe [2];
558static sig_atomic_t volatile gotsig;
559static struct ev_io sigev;
560
561static void
562signals_init (ANSIG *base, int count)
563{
564 while (count--)
565 {
566 base->head = 0;
567 base->gotsig = 0;
568
569 ++base;
570 }
571}
572
573static void
574sighandler (int signum) 1322ev_sighandler (int signum)
575{ 1323{
576#if WIN32 1324#if EV_MULTIPLICITY
577 signal (signum, sighandler); 1325 EV_P = signals [signum - 1].loop;
578#endif 1326#endif
579 1327
580 signals [signum - 1].gotsig = 1;
581
582 if (!gotsig)
583 {
584 int old_errno = errno;
585 gotsig = 1;
586#ifdef WIN32 1328#ifdef _WIN32
587 send (sigpipe [1], &signum, 1, MSG_DONTWAIT); 1329 signal (signum, ev_sighandler);
588#else
589 write (sigpipe [1], &signum, 1);
590#endif 1330#endif
591 errno = old_errno;
592 }
593}
594 1331
595void 1332 signals [signum - 1].pending = 1;
1333 evpipe_write (EV_A_ &sig_pending);
1334}
1335
1336void noinline
596ev_feed_signal_event (EV_P_ int signum) 1337ev_feed_signal_event (EV_P_ int signum)
597{ 1338{
598 WL w; 1339 WL w;
599 1340
1341 if (expect_false (signum <= 0 || signum > EV_NSIG))
1342 return;
1343
1344 --signum;
1345
600#if EV_MULTIPLICITY 1346#if EV_MULTIPLICITY
601 assert (("feeding signal events is only supported in the default loop", loop == default_loop)); 1347 /* it is permissible to try to feed a signal to the wrong loop */
602#endif 1348 /* or, likely more useful, feeding a signal nobody is waiting for */
603 1349
604 --signum; 1350 if (expect_false (signals [signum].loop != EV_A))
605
606 if (signum < 0 || signum >= signalmax)
607 return; 1351 return;
1352#endif
608 1353
609 signals [signum].gotsig = 0; 1354 signals [signum].pending = 0;
610 1355
611 for (w = signals [signum].head; w; w = w->next) 1356 for (w = signals [signum].head; w; w = w->next)
612 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1357 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
613} 1358}
614 1359
1360#if EV_USE_SIGNALFD
615static void 1361static void
616sigcb (EV_P_ struct ev_io *iow, int revents) 1362sigfdcb (EV_P_ ev_io *iow, int revents)
617{ 1363{
618 int signum; 1364 struct signalfd_siginfo si[2], *sip; /* these structs are big */
619 1365
620#ifdef WIN32 1366 for (;;)
621 recv (sigpipe [0], &revents, 1, MSG_DONTWAIT); 1367 {
622#else 1368 ssize_t res = read (sigfd, si, sizeof (si));
623 read (sigpipe [0], &revents, 1);
624#endif
625 gotsig = 0;
626 1369
627 for (signum = signalmax; signum--; ) 1370 /* not ISO-C, as res might be -1, but works with SuS */
628 if (signals [signum].gotsig) 1371 for (sip = si; (char *)sip < (char *)si + res; ++sip)
629 ev_feed_signal_event (EV_A_ signum + 1); 1372 ev_feed_signal_event (EV_A_ sip->ssi_signo);
630}
631 1373
632static void 1374 if (res < (ssize_t)sizeof (si))
633siginit (EV_P) 1375 break;
634{ 1376 }
635#ifndef WIN32
636 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
637 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
638
639 /* rather than sort out wether we really need nb, set it */
640 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
641 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
642#endif
643
644 ev_io_set (&sigev, sigpipe [0], EV_READ);
645 ev_io_start (EV_A_ &sigev);
646 ev_unref (EV_A); /* child watcher should not keep loop alive */
647} 1377}
1378#endif
1379
1380#endif
648 1381
649/*****************************************************************************/ 1382/*****************************************************************************/
650 1383
651static struct ev_child *childs [PID_HASHSIZE]; 1384#if EV_CHILD_ENABLE
1385static WL childs [EV_PID_HASHSIZE];
652 1386
653#ifndef WIN32
654
655static struct ev_signal childev; 1387static ev_signal childev;
1388
1389#ifndef WIFCONTINUED
1390# define WIFCONTINUED(status) 0
1391#endif
1392
1393/* handle a single child status event */
1394inline_speed void
1395child_reap (EV_P_ int chain, int pid, int status)
1396{
1397 ev_child *w;
1398 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1399
1400 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1401 {
1402 if ((w->pid == pid || !w->pid)
1403 && (!traced || (w->flags & 1)))
1404 {
1405 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1406 w->rpid = pid;
1407 w->rstatus = status;
1408 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1409 }
1410 }
1411}
656 1412
657#ifndef WCONTINUED 1413#ifndef WCONTINUED
658# define WCONTINUED 0 1414# define WCONTINUED 0
659#endif 1415#endif
660 1416
1417/* called on sigchld etc., calls waitpid */
661static void 1418static void
662child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
663{
664 struct ev_child *w;
665
666 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
667 if (w->pid == pid || !w->pid)
668 {
669 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
670 w->rpid = pid;
671 w->rstatus = status;
672 ev_feed_event (EV_A_ (W)w, EV_CHILD);
673 }
674}
675
676static void
677childcb (EV_P_ struct ev_signal *sw, int revents) 1419childcb (EV_P_ ev_signal *sw, int revents)
678{ 1420{
679 int pid, status; 1421 int pid, status;
680 1422
1423 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
681 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1424 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
682 { 1425 if (!WCONTINUED
1426 || errno != EINVAL
1427 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1428 return;
1429
683 /* make sure we are called again until all childs have been reaped */ 1430 /* make sure we are called again until all children have been reaped */
1431 /* we need to do it this way so that the callback gets called before we continue */
684 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1432 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
685 1433
686 child_reap (EV_A_ sw, pid, pid, status); 1434 child_reap (EV_A_ pid, pid, status);
1435 if ((EV_PID_HASHSIZE) > 1)
687 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1436 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
688 }
689} 1437}
690 1438
691#endif 1439#endif
692 1440
693/*****************************************************************************/ 1441/*****************************************************************************/
694 1442
1443#if EV_USE_PORT
1444# include "ev_port.c"
1445#endif
695#if EV_USE_KQUEUE 1446#if EV_USE_KQUEUE
696# include "ev_kqueue.c" 1447# include "ev_kqueue.c"
697#endif 1448#endif
698#if EV_USE_EPOLL 1449#if EV_USE_EPOLL
699# include "ev_epoll.c" 1450# include "ev_epoll.c"
… …
716{ 1467{
717 return EV_VERSION_MINOR; 1468 return EV_VERSION_MINOR;
718} 1469}
719 1470
720/* return true if we are running with elevated privileges and should ignore env variables */ 1471/* return true if we are running with elevated privileges and should ignore env variables */
721static int 1472int inline_size
722enable_secure (void) 1473enable_secure (void)
723{ 1474{
724#ifdef WIN32 1475#ifdef _WIN32
725 return 0; 1476 return 0;
726#else 1477#else
727 return getuid () != geteuid () 1478 return getuid () != geteuid ()
728 || getgid () != getegid (); 1479 || getgid () != getegid ();
729#endif 1480#endif
730} 1481}
731 1482
732int 1483unsigned int
733ev_method (EV_P) 1484ev_supported_backends (void)
734{ 1485{
735 return method; 1486 unsigned int flags = 0;
736}
737 1487
738static void 1488 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
739loop_init (EV_P_ int methods) 1489 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1490 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1491 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1492 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1493
1494 return flags;
1495}
1496
1497unsigned int
1498ev_recommended_backends (void)
740{ 1499{
741 if (!method) 1500 unsigned int flags = ev_supported_backends ();
1501
1502#ifndef __NetBSD__
1503 /* kqueue is borked on everything but netbsd apparently */
1504 /* it usually doesn't work correctly on anything but sockets and pipes */
1505 flags &= ~EVBACKEND_KQUEUE;
1506#endif
1507#ifdef __APPLE__
1508 /* only select works correctly on that "unix-certified" platform */
1509 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1510 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1511#endif
1512
1513 return flags;
1514}
1515
1516unsigned int
1517ev_embeddable_backends (void)
1518{
1519 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1520
1521 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1522 /* please fix it and tell me how to detect the fix */
1523 flags &= ~EVBACKEND_EPOLL;
1524
1525 return flags;
1526}
1527
1528unsigned int
1529ev_backend (EV_P)
1530{
1531 return backend;
1532}
1533
1534#if EV_FEATURE_API
1535unsigned int
1536ev_loop_count (EV_P)
1537{
1538 return loop_count;
1539}
1540
1541unsigned int
1542ev_loop_depth (EV_P)
1543{
1544 return loop_depth;
1545}
1546
1547void
1548ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1549{
1550 io_blocktime = interval;
1551}
1552
1553void
1554ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1555{
1556 timeout_blocktime = interval;
1557}
1558
1559void
1560ev_set_userdata (EV_P_ void *data)
1561{
1562 userdata = data;
1563}
1564
1565void *
1566ev_userdata (EV_P)
1567{
1568 return userdata;
1569}
1570
1571void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1572{
1573 invoke_cb = invoke_pending_cb;
1574}
1575
1576void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1577{
1578 release_cb = release;
1579 acquire_cb = acquire;
1580}
1581#endif
1582
1583/* initialise a loop structure, must be zero-initialised */
1584static void noinline
1585loop_init (EV_P_ unsigned int flags)
1586{
1587 if (!backend)
742 { 1588 {
1589#if EV_USE_REALTIME
1590 if (!have_realtime)
1591 {
1592 struct timespec ts;
1593
1594 if (!clock_gettime (CLOCK_REALTIME, &ts))
1595 have_realtime = 1;
1596 }
1597#endif
1598
743#if EV_USE_MONOTONIC 1599#if EV_USE_MONOTONIC
1600 if (!have_monotonic)
1601 {
1602 struct timespec ts;
1603
1604 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1605 have_monotonic = 1;
1606 }
1607#endif
1608
1609 /* pid check not overridable via env */
1610#ifndef _WIN32
1611 if (flags & EVFLAG_FORKCHECK)
1612 curpid = getpid ();
1613#endif
1614
1615 if (!(flags & EVFLAG_NOENV)
1616 && !enable_secure ()
1617 && getenv ("LIBEV_FLAGS"))
1618 flags = atoi (getenv ("LIBEV_FLAGS"));
1619
1620 ev_rt_now = ev_time ();
1621 mn_now = get_clock ();
1622 now_floor = mn_now;
1623 rtmn_diff = ev_rt_now - mn_now;
1624#if EV_FEATURE_API
1625 invoke_cb = ev_invoke_pending;
1626#endif
1627
1628 io_blocktime = 0.;
1629 timeout_blocktime = 0.;
1630 backend = 0;
1631 backend_fd = -1;
1632 sig_pending = 0;
1633#if EV_ASYNC_ENABLE
1634 async_pending = 0;
1635#endif
1636#if EV_USE_INOTIFY
1637 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1638#endif
1639#if EV_USE_SIGNALFD
1640 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1641#endif
1642
1643 if (!(flags & 0x0000ffffU))
1644 flags |= ev_recommended_backends ();
1645
1646#if EV_USE_PORT
1647 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1648#endif
1649#if EV_USE_KQUEUE
1650 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1651#endif
1652#if EV_USE_EPOLL
1653 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1654#endif
1655#if EV_USE_POLL
1656 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1657#endif
1658#if EV_USE_SELECT
1659 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1660#endif
1661
1662 ev_prepare_init (&pending_w, pendingcb);
1663
1664#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1665 ev_init (&pipe_w, pipecb);
1666 ev_set_priority (&pipe_w, EV_MAXPRI);
1667#endif
1668 }
1669}
1670
1671/* free up a loop structure */
1672static void noinline
1673loop_destroy (EV_P)
1674{
1675 int i;
1676
1677 if (ev_is_active (&pipe_w))
1678 {
1679 /*ev_ref (EV_A);*/
1680 /*ev_io_stop (EV_A_ &pipe_w);*/
1681
1682#if EV_USE_EVENTFD
1683 if (evfd >= 0)
1684 close (evfd);
1685#endif
1686
1687 if (evpipe [0] >= 0)
1688 {
1689 EV_WIN32_CLOSE_FD (evpipe [0]);
1690 EV_WIN32_CLOSE_FD (evpipe [1]);
1691 }
1692 }
1693
1694#if EV_USE_SIGNALFD
1695 if (ev_is_active (&sigfd_w))
1696 close (sigfd);
1697#endif
1698
1699#if EV_USE_INOTIFY
1700 if (fs_fd >= 0)
1701 close (fs_fd);
1702#endif
1703
1704 if (backend_fd >= 0)
1705 close (backend_fd);
1706
1707#if EV_USE_PORT
1708 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1709#endif
1710#if EV_USE_KQUEUE
1711 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1712#endif
1713#if EV_USE_EPOLL
1714 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1715#endif
1716#if EV_USE_POLL
1717 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1718#endif
1719#if EV_USE_SELECT
1720 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1721#endif
1722
1723 for (i = NUMPRI; i--; )
1724 {
1725 array_free (pending, [i]);
1726#if EV_IDLE_ENABLE
1727 array_free (idle, [i]);
1728#endif
1729 }
1730
1731 ev_free (anfds); anfds = 0; anfdmax = 0;
1732
1733 /* have to use the microsoft-never-gets-it-right macro */
1734 array_free (rfeed, EMPTY);
1735 array_free (fdchange, EMPTY);
1736 array_free (timer, EMPTY);
1737#if EV_PERIODIC_ENABLE
1738 array_free (periodic, EMPTY);
1739#endif
1740#if EV_FORK_ENABLE
1741 array_free (fork, EMPTY);
1742#endif
1743 array_free (prepare, EMPTY);
1744 array_free (check, EMPTY);
1745#if EV_ASYNC_ENABLE
1746 array_free (async, EMPTY);
1747#endif
1748
1749 backend = 0;
1750}
1751
1752#if EV_USE_INOTIFY
1753inline_size void infy_fork (EV_P);
1754#endif
1755
1756inline_size void
1757loop_fork (EV_P)
1758{
1759#if EV_USE_PORT
1760 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1761#endif
1762#if EV_USE_KQUEUE
1763 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1764#endif
1765#if EV_USE_EPOLL
1766 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1767#endif
1768#if EV_USE_INOTIFY
1769 infy_fork (EV_A);
1770#endif
1771
1772 if (ev_is_active (&pipe_w))
1773 {
1774 /* this "locks" the handlers against writing to the pipe */
1775 /* while we modify the fd vars */
1776 sig_pending = 1;
1777#if EV_ASYNC_ENABLE
1778 async_pending = 1;
1779#endif
1780
1781 ev_ref (EV_A);
1782 ev_io_stop (EV_A_ &pipe_w);
1783
1784#if EV_USE_EVENTFD
1785 if (evfd >= 0)
1786 close (evfd);
1787#endif
1788
1789 if (evpipe [0] >= 0)
1790 {
1791 EV_WIN32_CLOSE_FD (evpipe [0]);
1792 EV_WIN32_CLOSE_FD (evpipe [1]);
1793 }
1794
1795#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1796 evpipe_init (EV_A);
1797 /* now iterate over everything, in case we missed something */
1798 pipecb (EV_A_ &pipe_w, EV_READ);
1799#endif
1800 }
1801
1802 postfork = 0;
1803}
1804
1805#if EV_MULTIPLICITY
1806
1807struct ev_loop *
1808ev_loop_new (unsigned int flags)
1809{
1810 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1811
1812 memset (EV_A, 0, sizeof (struct ev_loop));
1813 loop_init (EV_A_ flags);
1814
1815 if (ev_backend (EV_A))
1816 return EV_A;
1817
1818 return 0;
1819}
1820
1821void
1822ev_loop_destroy (EV_P)
1823{
1824 loop_destroy (EV_A);
1825 ev_free (loop);
1826}
1827
1828void
1829ev_loop_fork (EV_P)
1830{
1831 postfork = 1; /* must be in line with ev_default_fork */
1832}
1833#endif /* multiplicity */
1834
1835#if EV_VERIFY
1836static void noinline
1837verify_watcher (EV_P_ W w)
1838{
1839 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1840
1841 if (w->pending)
1842 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1843}
1844
1845static void noinline
1846verify_heap (EV_P_ ANHE *heap, int N)
1847{
1848 int i;
1849
1850 for (i = HEAP0; i < N + HEAP0; ++i)
1851 {
1852 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1853 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1854 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1855
1856 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1857 }
1858}
1859
1860static void noinline
1861array_verify (EV_P_ W *ws, int cnt)
1862{
1863 while (cnt--)
1864 {
1865 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1866 verify_watcher (EV_A_ ws [cnt]);
1867 }
1868}
1869#endif
1870
1871#if EV_FEATURE_API
1872void
1873ev_loop_verify (EV_P)
1874{
1875#if EV_VERIFY
1876 int i;
1877 WL w;
1878
1879 assert (activecnt >= -1);
1880
1881 assert (fdchangemax >= fdchangecnt);
1882 for (i = 0; i < fdchangecnt; ++i)
1883 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1884
1885 assert (anfdmax >= 0);
1886 for (i = 0; i < anfdmax; ++i)
1887 for (w = anfds [i].head; w; w = w->next)
744 { 1888 {
745 struct timespec ts; 1889 verify_watcher (EV_A_ (W)w);
746 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1890 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
747 have_monotonic = 1; 1891 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
748 } 1892 }
749#endif
750 1893
751 ev_rt_now = ev_time (); 1894 assert (timermax >= timercnt);
752 mn_now = get_clock (); 1895 verify_heap (EV_A_ timers, timercnt);
753 now_floor = mn_now;
754 rtmn_diff = ev_rt_now - mn_now;
755 1896
756 if (methods == EVMETHOD_AUTO) 1897#if EV_PERIODIC_ENABLE
757 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1898 assert (periodicmax >= periodiccnt);
758 methods = atoi (getenv ("LIBEV_METHODS")); 1899 verify_heap (EV_A_ periodics, periodiccnt);
759 else
760 methods = EVMETHOD_ANY;
761
762 method = 0;
763#if EV_USE_WIN32
764 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
765#endif
766#if EV_USE_KQUEUE
767 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
768#endif
769#if EV_USE_EPOLL
770 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
771#endif
772#if EV_USE_POLL
773 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
774#endif
775#if EV_USE_SELECT
776 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
777#endif
778
779 ev_init (&sigev, sigcb);
780 ev_set_priority (&sigev, EV_MAXPRI);
781 }
782}
783
784void
785loop_destroy (EV_P)
786{
787 int i;
788
789#if EV_USE_WIN32
790 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
791#endif
792#if EV_USE_KQUEUE
793 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
794#endif
795#if EV_USE_EPOLL
796 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
797#endif
798#if EV_USE_POLL
799 if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
800#endif
801#if EV_USE_SELECT
802 if (method == EVMETHOD_SELECT) select_destroy (EV_A);
803#endif 1900#endif
804 1901
805 for (i = NUMPRI; i--; ) 1902 for (i = NUMPRI; i--; )
806 array_free (pending, [i]); 1903 {
1904 assert (pendingmax [i] >= pendingcnt [i]);
1905#if EV_IDLE_ENABLE
1906 assert (idleall >= 0);
1907 assert (idlemax [i] >= idlecnt [i]);
1908 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1909#endif
1910 }
807 1911
808 /* have to use the microsoft-never-gets-it-right macro */ 1912#if EV_FORK_ENABLE
809 array_free_microshit (fdchange); 1913 assert (forkmax >= forkcnt);
810 array_free_microshit (timer); 1914 array_verify (EV_A_ (W *)forks, forkcnt);
811#if EV_PERIODICS 1915#endif
812 array_free_microshit (periodic); 1916
1917#if EV_ASYNC_ENABLE
1918 assert (asyncmax >= asynccnt);
1919 array_verify (EV_A_ (W *)asyncs, asynccnt);
1920#endif
1921
1922#if EV_PREPARE_ENABLE
1923 assert (preparemax >= preparecnt);
1924 array_verify (EV_A_ (W *)prepares, preparecnt);
1925#endif
1926
1927#if EV_CHECK_ENABLE
1928 assert (checkmax >= checkcnt);
1929 array_verify (EV_A_ (W *)checks, checkcnt);
1930#endif
1931
1932# if 0
1933#if EV_CHILD_ENABLE
1934 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1935 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1936#endif
813#endif 1937# endif
814 array_free_microshit (idle);
815 array_free_microshit (prepare);
816 array_free_microshit (check);
817
818 method = 0;
819}
820
821static void
822loop_fork (EV_P)
823{
824#if EV_USE_EPOLL
825 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
826#endif 1938#endif
827#if EV_USE_KQUEUE
828 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
829#endif
830
831 if (ev_is_active (&sigev))
832 {
833 /* default loop */
834
835 ev_ref (EV_A);
836 ev_io_stop (EV_A_ &sigev);
837 close (sigpipe [0]);
838 close (sigpipe [1]);
839
840 while (pipe (sigpipe))
841 syserr ("(libev) error creating pipe");
842
843 siginit (EV_A);
844 }
845
846 postfork = 0;
847} 1939}
1940#endif
848 1941
849#if EV_MULTIPLICITY 1942#if EV_MULTIPLICITY
850struct ev_loop * 1943struct ev_loop *
851ev_loop_new (int methods) 1944ev_default_loop_init (unsigned int flags)
852{
853 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
854
855 memset (loop, 0, sizeof (struct ev_loop));
856
857 loop_init (EV_A_ methods);
858
859 if (ev_method (EV_A))
860 return loop;
861
862 return 0;
863}
864
865void
866ev_loop_destroy (EV_P)
867{
868 loop_destroy (EV_A);
869 ev_free (loop);
870}
871
872void
873ev_loop_fork (EV_P)
874{
875 postfork = 1;
876}
877
878#endif
879
880#if EV_MULTIPLICITY
881struct ev_loop *
882#else 1945#else
883int 1946int
1947ev_default_loop (unsigned int flags)
884#endif 1948#endif
885ev_default_loop (int methods)
886{ 1949{
887 if (sigpipe [0] == sigpipe [1])
888 if (pipe (sigpipe))
889 return 0;
890
891 if (!default_loop) 1950 if (!ev_default_loop_ptr)
892 { 1951 {
893#if EV_MULTIPLICITY 1952#if EV_MULTIPLICITY
894 struct ev_loop *loop = default_loop = &default_loop_struct; 1953 EV_P = ev_default_loop_ptr = &default_loop_struct;
895#else 1954#else
896 default_loop = 1; 1955 ev_default_loop_ptr = 1;
897#endif 1956#endif
898 1957
899 loop_init (EV_A_ methods); 1958 loop_init (EV_A_ flags);
900 1959
901 if (ev_method (EV_A)) 1960 if (ev_backend (EV_A))
902 { 1961 {
903 siginit (EV_A); 1962#if EV_CHILD_ENABLE
904
905#ifndef WIN32
906 ev_signal_init (&childev, childcb, SIGCHLD); 1963 ev_signal_init (&childev, childcb, SIGCHLD);
907 ev_set_priority (&childev, EV_MAXPRI); 1964 ev_set_priority (&childev, EV_MAXPRI);
908 ev_signal_start (EV_A_ &childev); 1965 ev_signal_start (EV_A_ &childev);
909 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1966 ev_unref (EV_A); /* child watcher should not keep loop alive */
910#endif 1967#endif
911 } 1968 }
912 else 1969 else
913 default_loop = 0; 1970 ev_default_loop_ptr = 0;
914 } 1971 }
915 1972
916 return default_loop; 1973 return ev_default_loop_ptr;
917} 1974}
918 1975
919void 1976void
920ev_default_destroy (void) 1977ev_default_destroy (void)
921{ 1978{
922#if EV_MULTIPLICITY 1979#if EV_MULTIPLICITY
923 struct ev_loop *loop = default_loop; 1980 EV_P = ev_default_loop_ptr;
924#endif 1981#endif
925 1982
926#ifndef WIN32 1983 ev_default_loop_ptr = 0;
1984
1985#if EV_CHILD_ENABLE
927 ev_ref (EV_A); /* child watcher */ 1986 ev_ref (EV_A); /* child watcher */
928 ev_signal_stop (EV_A_ &childev); 1987 ev_signal_stop (EV_A_ &childev);
929#endif 1988#endif
930 1989
931 ev_ref (EV_A); /* signal watcher */
932 ev_io_stop (EV_A_ &sigev);
933
934 close (sigpipe [0]); sigpipe [0] = 0;
935 close (sigpipe [1]); sigpipe [1] = 0;
936
937 loop_destroy (EV_A); 1990 loop_destroy (EV_A);
938} 1991}
939 1992
940void 1993void
941ev_default_fork (void) 1994ev_default_fork (void)
942{ 1995{
943#if EV_MULTIPLICITY 1996#if EV_MULTIPLICITY
944 struct ev_loop *loop = default_loop; 1997 EV_P = ev_default_loop_ptr;
945#endif 1998#endif
946 1999
947 if (method) 2000 postfork = 1; /* must be in line with ev_loop_fork */
948 postfork = 1;
949} 2001}
950 2002
951/*****************************************************************************/ 2003/*****************************************************************************/
952 2004
953static int 2005void
954any_pending (EV_P) 2006ev_invoke (EV_P_ void *w, int revents)
2007{
2008 EV_CB_INVOKE ((W)w, revents);
2009}
2010
2011unsigned int
2012ev_pending_count (EV_P)
955{ 2013{
956 int pri; 2014 int pri;
2015 unsigned int count = 0;
957 2016
958 for (pri = NUMPRI; pri--; ) 2017 for (pri = NUMPRI; pri--; )
959 if (pendingcnt [pri]) 2018 count += pendingcnt [pri];
960 return 1;
961 2019
962 return 0; 2020 return count;
963} 2021}
964 2022
965static void 2023void noinline
966call_pending (EV_P) 2024ev_invoke_pending (EV_P)
967{ 2025{
968 int pri; 2026 int pri;
969 2027
970 for (pri = NUMPRI; pri--; ) 2028 for (pri = NUMPRI; pri--; )
971 while (pendingcnt [pri]) 2029 while (pendingcnt [pri])
972 { 2030 {
973 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2031 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
974 2032
975 if (p->w) 2033 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
976 { 2034 /* ^ this is no longer true, as pending_w could be here */
2035
977 p->w->pending = 0; 2036 p->w->pending = 0;
978 EV_CB_INVOKE (p->w, p->events); 2037 EV_CB_INVOKE (p->w, p->events);
979 } 2038 EV_FREQUENT_CHECK;
980 } 2039 }
981} 2040}
982 2041
983static void 2042#if EV_IDLE_ENABLE
2043/* make idle watchers pending. this handles the "call-idle */
2044/* only when higher priorities are idle" logic */
2045inline_size void
2046idle_reify (EV_P)
2047{
2048 if (expect_false (idleall))
2049 {
2050 int pri;
2051
2052 for (pri = NUMPRI; pri--; )
2053 {
2054 if (pendingcnt [pri])
2055 break;
2056
2057 if (idlecnt [pri])
2058 {
2059 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2060 break;
2061 }
2062 }
2063 }
2064}
2065#endif
2066
2067/* make timers pending */
2068inline_size void
984timers_reify (EV_P) 2069timers_reify (EV_P)
985{ 2070{
2071 EV_FREQUENT_CHECK;
2072
986 while (timercnt && ((WT)timers [0])->at <= mn_now) 2073 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
987 { 2074 {
988 struct ev_timer *w = timers [0]; 2075 do
989
990 assert (("inactive timer on timer heap detected", ev_is_active (w)));
991
992 /* first reschedule or stop timer */
993 if (w->repeat)
994 { 2076 {
2077 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2078
2079 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2080
2081 /* first reschedule or stop timer */
2082 if (w->repeat)
2083 {
2084 ev_at (w) += w->repeat;
2085 if (ev_at (w) < mn_now)
2086 ev_at (w) = mn_now;
2087
995 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2088 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
996 2089
997 ((WT)w)->at += w->repeat; 2090 ANHE_at_cache (timers [HEAP0]);
998 if (((WT)w)->at < mn_now)
999 ((WT)w)->at = mn_now;
1000
1001 downheap ((WT *)timers, timercnt, 0); 2091 downheap (timers, timercnt, HEAP0);
2092 }
2093 else
2094 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2095
2096 EV_FREQUENT_CHECK;
2097 feed_reverse (EV_A_ (W)w);
1002 } 2098 }
1003 else 2099 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1004 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1005 2100
1006 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2101 feed_reverse_done (EV_A_ EV_TIMEOUT);
1007 } 2102 }
1008} 2103}
1009 2104
1010#if EV_PERIODICS 2105#if EV_PERIODIC_ENABLE
1011static void 2106/* make periodics pending */
2107inline_size void
1012periodics_reify (EV_P) 2108periodics_reify (EV_P)
1013{ 2109{
2110 EV_FREQUENT_CHECK;
2111
1014 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 2112 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1015 { 2113 {
1016 struct ev_periodic *w = periodics [0]; 2114 int feed_count = 0;
1017 2115
2116 do
2117 {
2118 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2119
1018 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 2120 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1019 2121
1020 /* first reschedule or stop timer */ 2122 /* first reschedule or stop timer */
2123 if (w->reschedule_cb)
2124 {
2125 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2126
2127 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2128
2129 ANHE_at_cache (periodics [HEAP0]);
2130 downheap (periodics, periodiccnt, HEAP0);
2131 }
2132 else if (w->interval)
2133 {
2134 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2135 /* if next trigger time is not sufficiently in the future, put it there */
2136 /* this might happen because of floating point inexactness */
2137 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2138 {
2139 ev_at (w) += w->interval;
2140
2141 /* if interval is unreasonably low we might still have a time in the past */
2142 /* so correct this. this will make the periodic very inexact, but the user */
2143 /* has effectively asked to get triggered more often than possible */
2144 if (ev_at (w) < ev_rt_now)
2145 ev_at (w) = ev_rt_now;
2146 }
2147
2148 ANHE_at_cache (periodics [HEAP0]);
2149 downheap (periodics, periodiccnt, HEAP0);
2150 }
2151 else
2152 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2153
2154 EV_FREQUENT_CHECK;
2155 feed_reverse (EV_A_ (W)w);
2156 }
2157 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2158
2159 feed_reverse_done (EV_A_ EV_PERIODIC);
2160 }
2161}
2162
2163/* simply recalculate all periodics */
2164/* TODO: maybe ensure that at leats one event happens when jumping forward? */
2165static void noinline
2166periodics_reschedule (EV_P)
2167{
2168 int i;
2169
2170 /* adjust periodics after time jump */
2171 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2172 {
2173 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2174
1021 if (w->reschedule_cb) 2175 if (w->reschedule_cb)
2176 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2177 else if (w->interval)
2178 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2179
2180 ANHE_at_cache (periodics [i]);
2181 }
2182
2183 reheap (periodics, periodiccnt);
2184}
2185#endif
2186
2187/* adjust all timers by a given offset */
2188static void noinline
2189timers_reschedule (EV_P_ ev_tstamp adjust)
2190{
2191 int i;
2192
2193 for (i = 0; i < timercnt; ++i)
2194 {
2195 ANHE *he = timers + i + HEAP0;
2196 ANHE_w (*he)->at += adjust;
2197 ANHE_at_cache (*he);
2198 }
2199}
2200
2201/* fetch new monotonic and realtime times from the kernel */
2202/* also detect if there was a timejump, and act accordingly */
2203inline_speed void
2204time_update (EV_P_ ev_tstamp max_block)
2205{
2206#if EV_USE_MONOTONIC
2207 if (expect_true (have_monotonic))
2208 {
2209 int i;
2210 ev_tstamp odiff = rtmn_diff;
2211
2212 mn_now = get_clock ();
2213
2214 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2215 /* interpolate in the meantime */
2216 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1022 { 2217 {
1023 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 2218 ev_rt_now = rtmn_diff + mn_now;
1024 2219 return;
1025 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1026 downheap ((WT *)periodics, periodiccnt, 0);
1027 } 2220 }
1028 else if (w->interval)
1029 {
1030 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1031 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1032 downheap ((WT *)periodics, periodiccnt, 0);
1033 }
1034 else
1035 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1036 2221
1037 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1038 }
1039}
1040
1041static void
1042periodics_reschedule (EV_P)
1043{
1044 int i;
1045
1046 /* adjust periodics after time jump */
1047 for (i = 0; i < periodiccnt; ++i)
1048 {
1049 struct ev_periodic *w = periodics [i];
1050
1051 if (w->reschedule_cb)
1052 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1053 else if (w->interval)
1054 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1055 }
1056
1057 /* now rebuild the heap */
1058 for (i = periodiccnt >> 1; i--; )
1059 downheap ((WT *)periodics, periodiccnt, i);
1060}
1061#endif
1062
1063inline int
1064time_update_monotonic (EV_P)
1065{
1066 mn_now = get_clock ();
1067
1068 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1069 {
1070 ev_rt_now = rtmn_diff + mn_now;
1071 return 0;
1072 }
1073 else
1074 {
1075 now_floor = mn_now; 2222 now_floor = mn_now;
1076 ev_rt_now = ev_time (); 2223 ev_rt_now = ev_time ();
1077 return 1;
1078 }
1079}
1080 2224
1081static void 2225 /* loop a few times, before making important decisions.
1082time_update (EV_P) 2226 * on the choice of "4": one iteration isn't enough,
1083{ 2227 * in case we get preempted during the calls to
1084 int i; 2228 * ev_time and get_clock. a second call is almost guaranteed
1085 2229 * to succeed in that case, though. and looping a few more times
1086#if EV_USE_MONOTONIC 2230 * doesn't hurt either as we only do this on time-jumps or
1087 if (expect_true (have_monotonic)) 2231 * in the unlikely event of having been preempted here.
1088 { 2232 */
1089 if (time_update_monotonic (EV_A)) 2233 for (i = 4; --i; )
1090 { 2234 {
1091 ev_tstamp odiff = rtmn_diff;
1092
1093 for (i = 4; --i; ) /* loop a few times, before making important decisions */
1094 {
1095 rtmn_diff = ev_rt_now - mn_now; 2235 rtmn_diff = ev_rt_now - mn_now;
1096 2236
1097 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2237 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1098 return; /* all is well */ 2238 return; /* all is well */
1099 2239
1100 ev_rt_now = ev_time (); 2240 ev_rt_now = ev_time ();
1101 mn_now = get_clock (); 2241 mn_now = get_clock ();
1102 now_floor = mn_now; 2242 now_floor = mn_now;
1103 } 2243 }
1104 2244
2245 /* no timer adjustment, as the monotonic clock doesn't jump */
2246 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1105# if EV_PERIODICS 2247# if EV_PERIODIC_ENABLE
2248 periodics_reschedule (EV_A);
2249# endif
2250 }
2251 else
2252#endif
2253 {
2254 ev_rt_now = ev_time ();
2255
2256 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2257 {
2258 /* adjust timers. this is easy, as the offset is the same for all of them */
2259 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2260#if EV_PERIODIC_ENABLE
1106 periodics_reschedule (EV_A); 2261 periodics_reschedule (EV_A);
1107# endif 2262#endif
1108 /* no timer adjustment, as the monotonic clock doesn't jump */
1109 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1110 } 2263 }
1111 }
1112 else
1113#endif
1114 {
1115 ev_rt_now = ev_time ();
1116
1117 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1118 {
1119#if EV_PERIODICS
1120 periodics_reschedule (EV_A);
1121#endif
1122
1123 /* adjust timers. this is easy, as the offset is the same for all */
1124 for (i = 0; i < timercnt; ++i)
1125 ((WT)timers [i])->at += ev_rt_now - mn_now;
1126 }
1127 2264
1128 mn_now = ev_rt_now; 2265 mn_now = ev_rt_now;
1129 } 2266 }
1130} 2267}
1131 2268
1132void 2269void
1133ev_ref (EV_P)
1134{
1135 ++activecnt;
1136}
1137
1138void
1139ev_unref (EV_P)
1140{
1141 --activecnt;
1142}
1143
1144static int loop_done;
1145
1146void
1147ev_loop (EV_P_ int flags) 2270ev_loop (EV_P_ int flags)
1148{ 2271{
1149 double block; 2272#if EV_FEATURE_API
1150 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 2273 ++loop_depth;
2274#endif
2275
2276 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2277
2278 loop_done = EVUNLOOP_CANCEL;
2279
2280 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1151 2281
1152 do 2282 do
1153 { 2283 {
2284#if EV_VERIFY >= 2
2285 ev_loop_verify (EV_A);
2286#endif
2287
2288#ifndef _WIN32
2289 if (expect_false (curpid)) /* penalise the forking check even more */
2290 if (expect_false (getpid () != curpid))
2291 {
2292 curpid = getpid ();
2293 postfork = 1;
2294 }
2295#endif
2296
2297#if EV_FORK_ENABLE
2298 /* we might have forked, so queue fork handlers */
2299 if (expect_false (postfork))
2300 if (forkcnt)
2301 {
2302 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2303 EV_INVOKE_PENDING;
2304 }
2305#endif
2306
2307#if EV_PREPARE_ENABLE
1154 /* queue check watchers (and execute them) */ 2308 /* queue prepare watchers (and execute them) */
1155 if (expect_false (preparecnt)) 2309 if (expect_false (preparecnt))
1156 { 2310 {
1157 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2311 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1158 call_pending (EV_A); 2312 EV_INVOKE_PENDING;
1159 } 2313 }
2314#endif
2315
2316 if (expect_false (loop_done))
2317 break;
1160 2318
1161 /* we might have forked, so reify kernel state if necessary */ 2319 /* we might have forked, so reify kernel state if necessary */
1162 if (expect_false (postfork)) 2320 if (expect_false (postfork))
1163 loop_fork (EV_A); 2321 loop_fork (EV_A);
1164 2322
1165 /* update fd-related kernel structures */ 2323 /* update fd-related kernel structures */
1166 fd_reify (EV_A); 2324 fd_reify (EV_A);
1167 2325
1168 /* calculate blocking time */ 2326 /* calculate blocking time */
2327 {
2328 ev_tstamp waittime = 0.;
2329 ev_tstamp sleeptime = 0.;
1169 2330
1170 /* we only need this for !monotonic clock or timers, but as we basically 2331 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1171 always have timers, we just calculate it always */
1172#if EV_USE_MONOTONIC
1173 if (expect_true (have_monotonic))
1174 time_update_monotonic (EV_A);
1175 else
1176#endif
1177 { 2332 {
1178 ev_rt_now = ev_time (); 2333 /* remember old timestamp for io_blocktime calculation */
1179 mn_now = ev_rt_now; 2334 ev_tstamp prev_mn_now = mn_now;
1180 }
1181 2335
1182 if (flags & EVLOOP_NONBLOCK || idlecnt) 2336 /* update time to cancel out callback processing overhead */
1183 block = 0.; 2337 time_update (EV_A_ 1e100);
1184 else 2338
1185 {
1186 block = MAX_BLOCKTIME; 2339 waittime = MAX_BLOCKTIME;
1187 2340
1188 if (timercnt) 2341 if (timercnt)
1189 { 2342 {
1190 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 2343 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1191 if (block > to) block = to; 2344 if (waittime > to) waittime = to;
1192 } 2345 }
1193 2346
1194#if EV_PERIODICS 2347#if EV_PERIODIC_ENABLE
1195 if (periodiccnt) 2348 if (periodiccnt)
1196 { 2349 {
1197 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 2350 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1198 if (block > to) block = to; 2351 if (waittime > to) waittime = to;
1199 } 2352 }
1200#endif 2353#endif
1201 2354
1202 if (block < 0.) block = 0.; 2355 /* don't let timeouts decrease the waittime below timeout_blocktime */
2356 if (expect_false (waittime < timeout_blocktime))
2357 waittime = timeout_blocktime;
2358
2359 /* extra check because io_blocktime is commonly 0 */
2360 if (expect_false (io_blocktime))
2361 {
2362 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2363
2364 if (sleeptime > waittime - backend_fudge)
2365 sleeptime = waittime - backend_fudge;
2366
2367 if (expect_true (sleeptime > 0.))
2368 {
2369 ev_sleep (sleeptime);
2370 waittime -= sleeptime;
2371 }
2372 }
1203 } 2373 }
1204 2374
1205 method_poll (EV_A_ block); 2375#if EV_FEATURE_API
2376 ++loop_count;
2377#endif
2378 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2379 backend_poll (EV_A_ waittime);
2380 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
1206 2381
1207 /* update ev_rt_now, do magic */ 2382 /* update ev_rt_now, do magic */
1208 time_update (EV_A); 2383 time_update (EV_A_ waittime + sleeptime);
2384 }
1209 2385
1210 /* queue pending timers and reschedule them */ 2386 /* queue pending timers and reschedule them */
1211 timers_reify (EV_A); /* relative timers called last */ 2387 timers_reify (EV_A); /* relative timers called last */
1212#if EV_PERIODICS 2388#if EV_PERIODIC_ENABLE
1213 periodics_reify (EV_A); /* absolute timers called first */ 2389 periodics_reify (EV_A); /* absolute timers called first */
1214#endif 2390#endif
1215 2391
2392#if EV_IDLE_ENABLE
1216 /* queue idle watchers unless io or timers are pending */ 2393 /* queue idle watchers unless other events are pending */
1217 if (idlecnt && !any_pending (EV_A)) 2394 idle_reify (EV_A);
1218 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2395#endif
1219 2396
2397#if EV_CHECK_ENABLE
1220 /* queue check watchers, to be executed first */ 2398 /* queue check watchers, to be executed first */
1221 if (checkcnt) 2399 if (expect_false (checkcnt))
1222 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2400 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2401#endif
1223 2402
1224 call_pending (EV_A); 2403 EV_INVOKE_PENDING;
1225 } 2404 }
1226 while (activecnt && !loop_done); 2405 while (expect_true (
2406 activecnt
2407 && !loop_done
2408 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2409 ));
1227 2410
1228 if (loop_done != 2) 2411 if (loop_done == EVUNLOOP_ONE)
1229 loop_done = 0; 2412 loop_done = EVUNLOOP_CANCEL;
2413
2414#if EV_FEATURE_API
2415 --loop_depth;
2416#endif
1230} 2417}
1231 2418
1232void 2419void
1233ev_unloop (EV_P_ int how) 2420ev_unloop (EV_P_ int how)
1234{ 2421{
1235 loop_done = how; 2422 loop_done = how;
1236} 2423}
1237 2424
2425void
2426ev_ref (EV_P)
2427{
2428 ++activecnt;
2429}
2430
2431void
2432ev_unref (EV_P)
2433{
2434 --activecnt;
2435}
2436
2437void
2438ev_now_update (EV_P)
2439{
2440 time_update (EV_A_ 1e100);
2441}
2442
2443void
2444ev_suspend (EV_P)
2445{
2446 ev_now_update (EV_A);
2447}
2448
2449void
2450ev_resume (EV_P)
2451{
2452 ev_tstamp mn_prev = mn_now;
2453
2454 ev_now_update (EV_A);
2455 timers_reschedule (EV_A_ mn_now - mn_prev);
2456#if EV_PERIODIC_ENABLE
2457 /* TODO: really do this? */
2458 periodics_reschedule (EV_A);
2459#endif
2460}
2461
1238/*****************************************************************************/ 2462/*****************************************************************************/
2463/* singly-linked list management, used when the expected list length is short */
1239 2464
1240inline void 2465inline_size void
1241wlist_add (WL *head, WL elem) 2466wlist_add (WL *head, WL elem)
1242{ 2467{
1243 elem->next = *head; 2468 elem->next = *head;
1244 *head = elem; 2469 *head = elem;
1245} 2470}
1246 2471
1247inline void 2472inline_size void
1248wlist_del (WL *head, WL elem) 2473wlist_del (WL *head, WL elem)
1249{ 2474{
1250 while (*head) 2475 while (*head)
1251 { 2476 {
1252 if (*head == elem) 2477 if (expect_true (*head == elem))
1253 { 2478 {
1254 *head = elem->next; 2479 *head = elem->next;
1255 return; 2480 break;
1256 } 2481 }
1257 2482
1258 head = &(*head)->next; 2483 head = &(*head)->next;
1259 } 2484 }
1260} 2485}
1261 2486
2487/* internal, faster, version of ev_clear_pending */
1262inline void 2488inline_speed void
1263ev_clear_pending (EV_P_ W w) 2489clear_pending (EV_P_ W w)
1264{ 2490{
1265 if (w->pending) 2491 if (w->pending)
1266 { 2492 {
1267 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2493 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1268 w->pending = 0; 2494 w->pending = 0;
1269 } 2495 }
1270} 2496}
1271 2497
2498int
2499ev_clear_pending (EV_P_ void *w)
2500{
2501 W w_ = (W)w;
2502 int pending = w_->pending;
2503
2504 if (expect_true (pending))
2505 {
2506 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2507 p->w = (W)&pending_w;
2508 w_->pending = 0;
2509 return p->events;
2510 }
2511 else
2512 return 0;
2513}
2514
1272inline void 2515inline_size void
2516pri_adjust (EV_P_ W w)
2517{
2518 int pri = ev_priority (w);
2519 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2520 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2521 ev_set_priority (w, pri);
2522}
2523
2524inline_speed void
1273ev_start (EV_P_ W w, int active) 2525ev_start (EV_P_ W w, int active)
1274{ 2526{
1275 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2527 pri_adjust (EV_A_ w);
1276 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1277
1278 w->active = active; 2528 w->active = active;
1279 ev_ref (EV_A); 2529 ev_ref (EV_A);
1280} 2530}
1281 2531
1282inline void 2532inline_size void
1283ev_stop (EV_P_ W w) 2533ev_stop (EV_P_ W w)
1284{ 2534{
1285 ev_unref (EV_A); 2535 ev_unref (EV_A);
1286 w->active = 0; 2536 w->active = 0;
1287} 2537}
1288 2538
1289/*****************************************************************************/ 2539/*****************************************************************************/
1290 2540
1291void 2541void noinline
1292ev_io_start (EV_P_ struct ev_io *w) 2542ev_io_start (EV_P_ ev_io *w)
1293{ 2543{
1294 int fd = w->fd; 2544 int fd = w->fd;
1295 2545
1296 if (ev_is_active (w)) 2546 if (expect_false (ev_is_active (w)))
1297 return; 2547 return;
1298 2548
1299 assert (("ev_io_start called with negative fd", fd >= 0)); 2549 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2550 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2551
2552 EV_FREQUENT_CHECK;
1300 2553
1301 ev_start (EV_A_ (W)w, 1); 2554 ev_start (EV_A_ (W)w, 1);
1302 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2555 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1303 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2556 wlist_add (&anfds[fd].head, (WL)w);
1304 2557
1305 fd_change (EV_A_ fd); 2558 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1306} 2559 w->events &= ~EV__IOFDSET;
1307 2560
1308void 2561 EV_FREQUENT_CHECK;
2562}
2563
2564void noinline
1309ev_io_stop (EV_P_ struct ev_io *w) 2565ev_io_stop (EV_P_ ev_io *w)
1310{ 2566{
1311 ev_clear_pending (EV_A_ (W)w); 2567 clear_pending (EV_A_ (W)w);
1312 if (!ev_is_active (w)) 2568 if (expect_false (!ev_is_active (w)))
1313 return; 2569 return;
1314 2570
1315 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2571 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1316 2572
2573 EV_FREQUENT_CHECK;
2574
1317 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2575 wlist_del (&anfds[w->fd].head, (WL)w);
1318 ev_stop (EV_A_ (W)w); 2576 ev_stop (EV_A_ (W)w);
1319 2577
1320 fd_change (EV_A_ w->fd); 2578 fd_change (EV_A_ w->fd, 1);
1321}
1322 2579
1323void 2580 EV_FREQUENT_CHECK;
2581}
2582
2583void noinline
1324ev_timer_start (EV_P_ struct ev_timer *w) 2584ev_timer_start (EV_P_ ev_timer *w)
1325{ 2585{
1326 if (ev_is_active (w)) 2586 if (expect_false (ev_is_active (w)))
1327 return; 2587 return;
1328 2588
1329 ((WT)w)->at += mn_now; 2589 ev_at (w) += mn_now;
1330 2590
1331 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2591 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1332 2592
2593 EV_FREQUENT_CHECK;
2594
2595 ++timercnt;
1333 ev_start (EV_A_ (W)w, ++timercnt); 2596 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1334 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void)); 2597 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1335 timers [timercnt - 1] = w; 2598 ANHE_w (timers [ev_active (w)]) = (WT)w;
1336 upheap ((WT *)timers, timercnt - 1); 2599 ANHE_at_cache (timers [ev_active (w)]);
2600 upheap (timers, ev_active (w));
1337 2601
2602 EV_FREQUENT_CHECK;
2603
1338 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2604 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1339} 2605}
1340 2606
1341void 2607void noinline
1342ev_timer_stop (EV_P_ struct ev_timer *w) 2608ev_timer_stop (EV_P_ ev_timer *w)
1343{ 2609{
1344 ev_clear_pending (EV_A_ (W)w); 2610 clear_pending (EV_A_ (W)w);
1345 if (!ev_is_active (w)) 2611 if (expect_false (!ev_is_active (w)))
1346 return; 2612 return;
1347 2613
2614 EV_FREQUENT_CHECK;
2615
2616 {
2617 int active = ev_active (w);
2618
1348 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2619 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1349 2620
1350 if (((W)w)->active < timercnt--) 2621 --timercnt;
2622
2623 if (expect_true (active < timercnt + HEAP0))
1351 { 2624 {
1352 timers [((W)w)->active - 1] = timers [timercnt]; 2625 timers [active] = timers [timercnt + HEAP0];
1353 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2626 adjustheap (timers, timercnt, active);
1354 } 2627 }
2628 }
1355 2629
1356 ((WT)w)->at -= mn_now; 2630 ev_at (w) -= mn_now;
1357 2631
1358 ev_stop (EV_A_ (W)w); 2632 ev_stop (EV_A_ (W)w);
1359}
1360 2633
1361void 2634 EV_FREQUENT_CHECK;
2635}
2636
2637void noinline
1362ev_timer_again (EV_P_ struct ev_timer *w) 2638ev_timer_again (EV_P_ ev_timer *w)
1363{ 2639{
2640 EV_FREQUENT_CHECK;
2641
1364 if (ev_is_active (w)) 2642 if (ev_is_active (w))
1365 { 2643 {
1366 if (w->repeat) 2644 if (w->repeat)
1367 { 2645 {
1368 ((WT)w)->at = mn_now + w->repeat; 2646 ev_at (w) = mn_now + w->repeat;
2647 ANHE_at_cache (timers [ev_active (w)]);
1369 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2648 adjustheap (timers, timercnt, ev_active (w));
1370 } 2649 }
1371 else 2650 else
1372 ev_timer_stop (EV_A_ w); 2651 ev_timer_stop (EV_A_ w);
1373 } 2652 }
1374 else if (w->repeat) 2653 else if (w->repeat)
2654 {
2655 ev_at (w) = w->repeat;
1375 ev_timer_start (EV_A_ w); 2656 ev_timer_start (EV_A_ w);
1376} 2657 }
1377 2658
2659 EV_FREQUENT_CHECK;
2660}
2661
2662ev_tstamp
2663ev_timer_remaining (EV_P_ ev_timer *w)
2664{
2665 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2666}
2667
1378#if EV_PERIODICS 2668#if EV_PERIODIC_ENABLE
1379void 2669void noinline
1380ev_periodic_start (EV_P_ struct ev_periodic *w) 2670ev_periodic_start (EV_P_ ev_periodic *w)
1381{ 2671{
1382 if (ev_is_active (w)) 2672 if (expect_false (ev_is_active (w)))
1383 return; 2673 return;
1384 2674
1385 if (w->reschedule_cb) 2675 if (w->reschedule_cb)
1386 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2676 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1387 else if (w->interval) 2677 else if (w->interval)
1388 { 2678 {
1389 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2679 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1390 /* this formula differs from the one in periodic_reify because we do not always round up */ 2680 /* this formula differs from the one in periodic_reify because we do not always round up */
1391 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2681 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1392 } 2682 }
2683 else
2684 ev_at (w) = w->offset;
1393 2685
2686 EV_FREQUENT_CHECK;
2687
2688 ++periodiccnt;
1394 ev_start (EV_A_ (W)w, ++periodiccnt); 2689 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1395 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); 2690 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1396 periodics [periodiccnt - 1] = w; 2691 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1397 upheap ((WT *)periodics, periodiccnt - 1); 2692 ANHE_at_cache (periodics [ev_active (w)]);
2693 upheap (periodics, ev_active (w));
1398 2694
2695 EV_FREQUENT_CHECK;
2696
1399 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2697 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1400} 2698}
1401 2699
1402void 2700void noinline
1403ev_periodic_stop (EV_P_ struct ev_periodic *w) 2701ev_periodic_stop (EV_P_ ev_periodic *w)
1404{ 2702{
1405 ev_clear_pending (EV_A_ (W)w); 2703 clear_pending (EV_A_ (W)w);
1406 if (!ev_is_active (w)) 2704 if (expect_false (!ev_is_active (w)))
1407 return; 2705 return;
1408 2706
2707 EV_FREQUENT_CHECK;
2708
2709 {
2710 int active = ev_active (w);
2711
1409 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2712 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1410 2713
1411 if (((W)w)->active < periodiccnt--) 2714 --periodiccnt;
2715
2716 if (expect_true (active < periodiccnt + HEAP0))
1412 { 2717 {
1413 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2718 periodics [active] = periodics [periodiccnt + HEAP0];
1414 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2719 adjustheap (periodics, periodiccnt, active);
1415 } 2720 }
2721 }
1416 2722
1417 ev_stop (EV_A_ (W)w); 2723 ev_stop (EV_A_ (W)w);
1418}
1419 2724
1420void 2725 EV_FREQUENT_CHECK;
2726}
2727
2728void noinline
1421ev_periodic_again (EV_P_ struct ev_periodic *w) 2729ev_periodic_again (EV_P_ ev_periodic *w)
1422{ 2730{
1423 /* TODO: use adjustheap and recalculation */ 2731 /* TODO: use adjustheap and recalculation */
1424 ev_periodic_stop (EV_A_ w); 2732 ev_periodic_stop (EV_A_ w);
1425 ev_periodic_start (EV_A_ w); 2733 ev_periodic_start (EV_A_ w);
1426} 2734}
1427#endif 2735#endif
1428 2736
1429void
1430ev_idle_start (EV_P_ struct ev_idle *w)
1431{
1432 if (ev_is_active (w))
1433 return;
1434
1435 ev_start (EV_A_ (W)w, ++idlecnt);
1436 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1437 idles [idlecnt - 1] = w;
1438}
1439
1440void
1441ev_idle_stop (EV_P_ struct ev_idle *w)
1442{
1443 ev_clear_pending (EV_A_ (W)w);
1444 if (!ev_is_active (w))
1445 return;
1446
1447 idles [((W)w)->active - 1] = idles [--idlecnt];
1448 ev_stop (EV_A_ (W)w);
1449}
1450
1451void
1452ev_prepare_start (EV_P_ struct ev_prepare *w)
1453{
1454 if (ev_is_active (w))
1455 return;
1456
1457 ev_start (EV_A_ (W)w, ++preparecnt);
1458 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1459 prepares [preparecnt - 1] = w;
1460}
1461
1462void
1463ev_prepare_stop (EV_P_ struct ev_prepare *w)
1464{
1465 ev_clear_pending (EV_A_ (W)w);
1466 if (!ev_is_active (w))
1467 return;
1468
1469 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1470 ev_stop (EV_A_ (W)w);
1471}
1472
1473void
1474ev_check_start (EV_P_ struct ev_check *w)
1475{
1476 if (ev_is_active (w))
1477 return;
1478
1479 ev_start (EV_A_ (W)w, ++checkcnt);
1480 array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1481 checks [checkcnt - 1] = w;
1482}
1483
1484void
1485ev_check_stop (EV_P_ struct ev_check *w)
1486{
1487 ev_clear_pending (EV_A_ (W)w);
1488 if (!ev_is_active (w))
1489 return;
1490
1491 checks [((W)w)->active - 1] = checks [--checkcnt];
1492 ev_stop (EV_A_ (W)w);
1493}
1494
1495#ifndef SA_RESTART 2737#ifndef SA_RESTART
1496# define SA_RESTART 0 2738# define SA_RESTART 0
1497#endif 2739#endif
1498 2740
1499void 2741#if EV_SIGNAL_ENABLE
2742
2743void noinline
1500ev_signal_start (EV_P_ struct ev_signal *w) 2744ev_signal_start (EV_P_ ev_signal *w)
1501{ 2745{
2746 if (expect_false (ev_is_active (w)))
2747 return;
2748
2749 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2750
1502#if EV_MULTIPLICITY 2751#if EV_MULTIPLICITY
1503 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2752 assert (("libev: a signal must not be attached to two different loops",
2753 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2754
2755 signals [w->signum - 1].loop = EV_A;
2756#endif
2757
2758 EV_FREQUENT_CHECK;
2759
2760#if EV_USE_SIGNALFD
2761 if (sigfd == -2)
2762 {
2763 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2764 if (sigfd < 0 && errno == EINVAL)
2765 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2766
2767 if (sigfd >= 0)
2768 {
2769 fd_intern (sigfd); /* doing it twice will not hurt */
2770
2771 sigemptyset (&sigfd_set);
2772
2773 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2774 ev_set_priority (&sigfd_w, EV_MAXPRI);
2775 ev_io_start (EV_A_ &sigfd_w);
2776 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2777 }
2778 }
2779
2780 if (sigfd >= 0)
2781 {
2782 /* TODO: check .head */
2783 sigaddset (&sigfd_set, w->signum);
2784 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2785
2786 signalfd (sigfd, &sigfd_set, 0);
2787 }
2788#endif
2789
2790 ev_start (EV_A_ (W)w, 1);
2791 wlist_add (&signals [w->signum - 1].head, (WL)w);
2792
2793 if (!((WL)w)->next)
2794# if EV_USE_SIGNALFD
2795 if (sigfd < 0) /*TODO*/
1504#endif 2796# endif
1505 if (ev_is_active (w)) 2797 {
2798# ifdef _WIN32
2799 evpipe_init (EV_A);
2800
2801 signal (w->signum, ev_sighandler);
2802# else
2803 struct sigaction sa;
2804
2805 evpipe_init (EV_A);
2806
2807 sa.sa_handler = ev_sighandler;
2808 sigfillset (&sa.sa_mask);
2809 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2810 sigaction (w->signum, &sa, 0);
2811
2812 sigemptyset (&sa.sa_mask);
2813 sigaddset (&sa.sa_mask, w->signum);
2814 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2815#endif
2816 }
2817
2818 EV_FREQUENT_CHECK;
2819}
2820
2821void noinline
2822ev_signal_stop (EV_P_ ev_signal *w)
2823{
2824 clear_pending (EV_A_ (W)w);
2825 if (expect_false (!ev_is_active (w)))
1506 return; 2826 return;
1507 2827
1508 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2828 EV_FREQUENT_CHECK;
2829
2830 wlist_del (&signals [w->signum - 1].head, (WL)w);
2831 ev_stop (EV_A_ (W)w);
2832
2833 if (!signals [w->signum - 1].head)
2834 {
2835#if EV_MULTIPLICITY
2836 signals [w->signum - 1].loop = 0; /* unattach from signal */
2837#endif
2838#if EV_USE_SIGNALFD
2839 if (sigfd >= 0)
2840 {
2841 sigset_t ss;
2842
2843 sigemptyset (&ss);
2844 sigaddset (&ss, w->signum);
2845 sigdelset (&sigfd_set, w->signum);
2846
2847 signalfd (sigfd, &sigfd_set, 0);
2848 sigprocmask (SIG_UNBLOCK, &ss, 0);
2849 }
2850 else
2851#endif
2852 signal (w->signum, SIG_DFL);
2853 }
2854
2855 EV_FREQUENT_CHECK;
2856}
2857
2858#endif
2859
2860#if EV_CHILD_ENABLE
2861
2862void
2863ev_child_start (EV_P_ ev_child *w)
2864{
2865#if EV_MULTIPLICITY
2866 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2867#endif
2868 if (expect_false (ev_is_active (w)))
2869 return;
2870
2871 EV_FREQUENT_CHECK;
1509 2872
1510 ev_start (EV_A_ (W)w, 1); 2873 ev_start (EV_A_ (W)w, 1);
1511 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 2874 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1512 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1513 2875
1514 if (!((WL)w)->next) 2876 EV_FREQUENT_CHECK;
2877}
2878
2879void
2880ev_child_stop (EV_P_ ev_child *w)
2881{
2882 clear_pending (EV_A_ (W)w);
2883 if (expect_false (!ev_is_active (w)))
2884 return;
2885
2886 EV_FREQUENT_CHECK;
2887
2888 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2889 ev_stop (EV_A_ (W)w);
2890
2891 EV_FREQUENT_CHECK;
2892}
2893
2894#endif
2895
2896#if EV_STAT_ENABLE
2897
2898# ifdef _WIN32
2899# undef lstat
2900# define lstat(a,b) _stati64 (a,b)
2901# endif
2902
2903#define DEF_STAT_INTERVAL 5.0074891
2904#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2905#define MIN_STAT_INTERVAL 0.1074891
2906
2907static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2908
2909#if EV_USE_INOTIFY
2910
2911/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2912# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2913
2914static void noinline
2915infy_add (EV_P_ ev_stat *w)
2916{
2917 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);
2918
2919 if (w->wd >= 0)
2920 {
2921 struct statfs sfs;
2922
2923 /* now local changes will be tracked by inotify, but remote changes won't */
2924 /* unless the filesystem is known to be local, we therefore still poll */
2925 /* also do poll on <2.6.25, but with normal frequency */
2926
2927 if (!fs_2625)
2928 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2929 else if (!statfs (w->path, &sfs)
2930 && (sfs.f_type == 0x1373 /* devfs */
2931 || sfs.f_type == 0xEF53 /* ext2/3 */
2932 || sfs.f_type == 0x3153464a /* jfs */
2933 || sfs.f_type == 0x52654973 /* reiser3 */
2934 || sfs.f_type == 0x01021994 /* tempfs */
2935 || sfs.f_type == 0x58465342 /* xfs */))
2936 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2937 else
2938 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1515 { 2939 }
1516#if WIN32 2940 else
1517 signal (w->signum, sighandler); 2941 {
2942 /* can't use inotify, continue to stat */
2943 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2944
2945 /* if path is not there, monitor some parent directory for speedup hints */
2946 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2947 /* but an efficiency issue only */
2948 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2949 {
2950 char path [4096];
2951 strcpy (path, w->path);
2952
2953 do
2954 {
2955 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2956 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2957
2958 char *pend = strrchr (path, '/');
2959
2960 if (!pend || pend == path)
2961 break;
2962
2963 *pend = 0;
2964 w->wd = inotify_add_watch (fs_fd, path, mask);
2965 }
2966 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2967 }
2968 }
2969
2970 if (w->wd >= 0)
2971 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2972
2973 /* now re-arm timer, if required */
2974 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2975 ev_timer_again (EV_A_ &w->timer);
2976 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2977}
2978
2979static void noinline
2980infy_del (EV_P_ ev_stat *w)
2981{
2982 int slot;
2983 int wd = w->wd;
2984
2985 if (wd < 0)
2986 return;
2987
2988 w->wd = -2;
2989 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2990 wlist_del (&fs_hash [slot].head, (WL)w);
2991
2992 /* remove this watcher, if others are watching it, they will rearm */
2993 inotify_rm_watch (fs_fd, wd);
2994}
2995
2996static void noinline
2997infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2998{
2999 if (slot < 0)
3000 /* overflow, need to check for all hash slots */
3001 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3002 infy_wd (EV_A_ slot, wd, ev);
3003 else
3004 {
3005 WL w_;
3006
3007 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3008 {
3009 ev_stat *w = (ev_stat *)w_;
3010 w_ = w_->next; /* lets us remove this watcher and all before it */
3011
3012 if (w->wd == wd || wd == -1)
3013 {
3014 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3015 {
3016 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3017 w->wd = -1;
3018 infy_add (EV_A_ w); /* re-add, no matter what */
3019 }
3020
3021 stat_timer_cb (EV_A_ &w->timer, 0);
3022 }
3023 }
3024 }
3025}
3026
3027static void
3028infy_cb (EV_P_ ev_io *w, int revents)
3029{
3030 char buf [EV_INOTIFY_BUFSIZE];
3031 int ofs;
3032 int len = read (fs_fd, buf, sizeof (buf));
3033
3034 for (ofs = 0; ofs < len; )
3035 {
3036 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3037 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3038 ofs += sizeof (struct inotify_event) + ev->len;
3039 }
3040}
3041
3042inline_size unsigned int
3043ev_linux_version (void)
3044{
3045 struct utsname buf;
3046 unsigned int v;
3047 int i;
3048 char *p = buf.release;
3049
3050 if (uname (&buf))
3051 return 0;
3052
3053 for (i = 3+1; --i; )
3054 {
3055 unsigned int c = 0;
3056
3057 for (;;)
3058 {
3059 if (*p >= '0' && *p <= '9')
3060 c = c * 10 + *p++ - '0';
3061 else
3062 {
3063 p += *p == '.';
3064 break;
3065 }
3066 }
3067
3068 v = (v << 8) | c;
3069 }
3070
3071 return v;
3072}
3073
3074inline_size void
3075ev_check_2625 (EV_P)
3076{
3077 /* kernels < 2.6.25 are borked
3078 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3079 */
3080 if (ev_linux_version () < 0x020619)
3081 return;
3082
3083 fs_2625 = 1;
3084}
3085
3086inline_size int
3087infy_newfd (void)
3088{
3089#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3090 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3091 if (fd >= 0)
3092 return fd;
3093#endif
3094 return inotify_init ();
3095}
3096
3097inline_size void
3098infy_init (EV_P)
3099{
3100 if (fs_fd != -2)
3101 return;
3102
3103 fs_fd = -1;
3104
3105 ev_check_2625 (EV_A);
3106
3107 fs_fd = infy_newfd ();
3108
3109 if (fs_fd >= 0)
3110 {
3111 fd_intern (fs_fd);
3112 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3113 ev_set_priority (&fs_w, EV_MAXPRI);
3114 ev_io_start (EV_A_ &fs_w);
3115 ev_unref (EV_A);
3116 }
3117}
3118
3119inline_size void
3120infy_fork (EV_P)
3121{
3122 int slot;
3123
3124 if (fs_fd < 0)
3125 return;
3126
3127 ev_ref (EV_A);
3128 ev_io_stop (EV_A_ &fs_w);
3129 close (fs_fd);
3130 fs_fd = infy_newfd ();
3131
3132 if (fs_fd >= 0)
3133 {
3134 fd_intern (fs_fd);
3135 ev_io_set (&fs_w, fs_fd, EV_READ);
3136 ev_io_start (EV_A_ &fs_w);
3137 ev_unref (EV_A);
3138 }
3139
3140 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3141 {
3142 WL w_ = fs_hash [slot].head;
3143 fs_hash [slot].head = 0;
3144
3145 while (w_)
3146 {
3147 ev_stat *w = (ev_stat *)w_;
3148 w_ = w_->next; /* lets us add this watcher */
3149
3150 w->wd = -1;
3151
3152 if (fs_fd >= 0)
3153 infy_add (EV_A_ w); /* re-add, no matter what */
3154 else
3155 {
3156 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3157 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3158 ev_timer_again (EV_A_ &w->timer);
3159 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3160 }
3161 }
3162 }
3163}
3164
3165#endif
3166
3167#ifdef _WIN32
3168# define EV_LSTAT(p,b) _stati64 (p, b)
1518#else 3169#else
1519 struct sigaction sa; 3170# define EV_LSTAT(p,b) lstat (p, b)
1520 sa.sa_handler = sighandler;
1521 sigfillset (&sa.sa_mask);
1522 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1523 sigaction (w->signum, &sa, 0);
1524#endif 3171#endif
1525 }
1526}
1527 3172
1528void 3173void
1529ev_signal_stop (EV_P_ struct ev_signal *w) 3174ev_stat_stat (EV_P_ ev_stat *w)
1530{ 3175{
1531 ev_clear_pending (EV_A_ (W)w); 3176 if (lstat (w->path, &w->attr) < 0)
1532 if (!ev_is_active (w)) 3177 w->attr.st_nlink = 0;
3178 else if (!w->attr.st_nlink)
3179 w->attr.st_nlink = 1;
3180}
3181
3182static void noinline
3183stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3184{
3185 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3186
3187 ev_statdata prev = w->attr;
3188 ev_stat_stat (EV_A_ w);
3189
3190 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3191 if (
3192 prev.st_dev != w->attr.st_dev
3193 || prev.st_ino != w->attr.st_ino
3194 || prev.st_mode != w->attr.st_mode
3195 || prev.st_nlink != w->attr.st_nlink
3196 || prev.st_uid != w->attr.st_uid
3197 || prev.st_gid != w->attr.st_gid
3198 || prev.st_rdev != w->attr.st_rdev
3199 || prev.st_size != w->attr.st_size
3200 || prev.st_atime != w->attr.st_atime
3201 || prev.st_mtime != w->attr.st_mtime
3202 || prev.st_ctime != w->attr.st_ctime
3203 ) {
3204 /* we only update w->prev on actual differences */
3205 /* in case we test more often than invoke the callback, */
3206 /* to ensure that prev is always different to attr */
3207 w->prev = prev;
3208
3209 #if EV_USE_INOTIFY
3210 if (fs_fd >= 0)
3211 {
3212 infy_del (EV_A_ w);
3213 infy_add (EV_A_ w);
3214 ev_stat_stat (EV_A_ w); /* avoid race... */
3215 }
3216 #endif
3217
3218 ev_feed_event (EV_A_ w, EV_STAT);
3219 }
3220}
3221
3222void
3223ev_stat_start (EV_P_ ev_stat *w)
3224{
3225 if (expect_false (ev_is_active (w)))
1533 return; 3226 return;
1534 3227
1535 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3228 ev_stat_stat (EV_A_ w);
3229
3230 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3231 w->interval = MIN_STAT_INTERVAL;
3232
3233 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3234 ev_set_priority (&w->timer, ev_priority (w));
3235
3236#if EV_USE_INOTIFY
3237 infy_init (EV_A);
3238
3239 if (fs_fd >= 0)
3240 infy_add (EV_A_ w);
3241 else
3242#endif
3243 {
3244 ev_timer_again (EV_A_ &w->timer);
3245 ev_unref (EV_A);
3246 }
3247
3248 ev_start (EV_A_ (W)w, 1);
3249
3250 EV_FREQUENT_CHECK;
3251}
3252
3253void
3254ev_stat_stop (EV_P_ ev_stat *w)
3255{
3256 clear_pending (EV_A_ (W)w);
3257 if (expect_false (!ev_is_active (w)))
3258 return;
3259
3260 EV_FREQUENT_CHECK;
3261
3262#if EV_USE_INOTIFY
3263 infy_del (EV_A_ w);
3264#endif
3265
3266 if (ev_is_active (&w->timer))
3267 {
3268 ev_ref (EV_A);
3269 ev_timer_stop (EV_A_ &w->timer);
3270 }
3271
1536 ev_stop (EV_A_ (W)w); 3272 ev_stop (EV_A_ (W)w);
1537 3273
1538 if (!signals [w->signum - 1].head) 3274 EV_FREQUENT_CHECK;
1539 signal (w->signum, SIG_DFL);
1540} 3275}
3276#endif
1541 3277
3278#if EV_IDLE_ENABLE
1542void 3279void
1543ev_child_start (EV_P_ struct ev_child *w) 3280ev_idle_start (EV_P_ ev_idle *w)
1544{ 3281{
1545#if EV_MULTIPLICITY
1546 assert (("child watchers are only supported in the default loop", loop == default_loop));
1547#endif
1548 if (ev_is_active (w)) 3282 if (expect_false (ev_is_active (w)))
1549 return; 3283 return;
1550 3284
3285 pri_adjust (EV_A_ (W)w);
3286
3287 EV_FREQUENT_CHECK;
3288
3289 {
3290 int active = ++idlecnt [ABSPRI (w)];
3291
3292 ++idleall;
3293 ev_start (EV_A_ (W)w, active);
3294
3295 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3296 idles [ABSPRI (w)][active - 1] = w;
3297 }
3298
3299 EV_FREQUENT_CHECK;
3300}
3301
3302void
3303ev_idle_stop (EV_P_ ev_idle *w)
3304{
3305 clear_pending (EV_A_ (W)w);
3306 if (expect_false (!ev_is_active (w)))
3307 return;
3308
3309 EV_FREQUENT_CHECK;
3310
3311 {
3312 int active = ev_active (w);
3313
3314 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3315 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3316
3317 ev_stop (EV_A_ (W)w);
3318 --idleall;
3319 }
3320
3321 EV_FREQUENT_CHECK;
3322}
3323#endif
3324
3325#if EV_PREPARE_ENABLE
3326void
3327ev_prepare_start (EV_P_ ev_prepare *w)
3328{
3329 if (expect_false (ev_is_active (w)))
3330 return;
3331
3332 EV_FREQUENT_CHECK;
3333
3334 ev_start (EV_A_ (W)w, ++preparecnt);
3335 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3336 prepares [preparecnt - 1] = w;
3337
3338 EV_FREQUENT_CHECK;
3339}
3340
3341void
3342ev_prepare_stop (EV_P_ ev_prepare *w)
3343{
3344 clear_pending (EV_A_ (W)w);
3345 if (expect_false (!ev_is_active (w)))
3346 return;
3347
3348 EV_FREQUENT_CHECK;
3349
3350 {
3351 int active = ev_active (w);
3352
3353 prepares [active - 1] = prepares [--preparecnt];
3354 ev_active (prepares [active - 1]) = active;
3355 }
3356
3357 ev_stop (EV_A_ (W)w);
3358
3359 EV_FREQUENT_CHECK;
3360}
3361#endif
3362
3363#if EV_CHECK_ENABLE
3364void
3365ev_check_start (EV_P_ ev_check *w)
3366{
3367 if (expect_false (ev_is_active (w)))
3368 return;
3369
3370 EV_FREQUENT_CHECK;
3371
3372 ev_start (EV_A_ (W)w, ++checkcnt);
3373 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3374 checks [checkcnt - 1] = w;
3375
3376 EV_FREQUENT_CHECK;
3377}
3378
3379void
3380ev_check_stop (EV_P_ ev_check *w)
3381{
3382 clear_pending (EV_A_ (W)w);
3383 if (expect_false (!ev_is_active (w)))
3384 return;
3385
3386 EV_FREQUENT_CHECK;
3387
3388 {
3389 int active = ev_active (w);
3390
3391 checks [active - 1] = checks [--checkcnt];
3392 ev_active (checks [active - 1]) = active;
3393 }
3394
3395 ev_stop (EV_A_ (W)w);
3396
3397 EV_FREQUENT_CHECK;
3398}
3399#endif
3400
3401#if EV_EMBED_ENABLE
3402void noinline
3403ev_embed_sweep (EV_P_ ev_embed *w)
3404{
3405 ev_loop (w->other, EVLOOP_NONBLOCK);
3406}
3407
3408static void
3409embed_io_cb (EV_P_ ev_io *io, int revents)
3410{
3411 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3412
3413 if (ev_cb (w))
3414 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3415 else
3416 ev_loop (w->other, EVLOOP_NONBLOCK);
3417}
3418
3419static void
3420embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3421{
3422 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3423
3424 {
3425 EV_P = w->other;
3426
3427 while (fdchangecnt)
3428 {
3429 fd_reify (EV_A);
3430 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3431 }
3432 }
3433}
3434
3435static void
3436embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3437{
3438 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3439
3440 ev_embed_stop (EV_A_ w);
3441
3442 {
3443 EV_P = w->other;
3444
3445 ev_loop_fork (EV_A);
3446 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3447 }
3448
3449 ev_embed_start (EV_A_ w);
3450}
3451
3452#if 0
3453static void
3454embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3455{
3456 ev_idle_stop (EV_A_ idle);
3457}
3458#endif
3459
3460void
3461ev_embed_start (EV_P_ ev_embed *w)
3462{
3463 if (expect_false (ev_is_active (w)))
3464 return;
3465
3466 {
3467 EV_P = w->other;
3468 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3469 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3470 }
3471
3472 EV_FREQUENT_CHECK;
3473
3474 ev_set_priority (&w->io, ev_priority (w));
3475 ev_io_start (EV_A_ &w->io);
3476
3477 ev_prepare_init (&w->prepare, embed_prepare_cb);
3478 ev_set_priority (&w->prepare, EV_MINPRI);
3479 ev_prepare_start (EV_A_ &w->prepare);
3480
3481 ev_fork_init (&w->fork, embed_fork_cb);
3482 ev_fork_start (EV_A_ &w->fork);
3483
3484 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3485
1551 ev_start (EV_A_ (W)w, 1); 3486 ev_start (EV_A_ (W)w, 1);
1552 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1553}
1554 3487
3488 EV_FREQUENT_CHECK;
3489}
3490
1555void 3491void
1556ev_child_stop (EV_P_ struct ev_child *w) 3492ev_embed_stop (EV_P_ ev_embed *w)
1557{ 3493{
1558 ev_clear_pending (EV_A_ (W)w); 3494 clear_pending (EV_A_ (W)w);
1559 if (!ev_is_active (w)) 3495 if (expect_false (!ev_is_active (w)))
1560 return; 3496 return;
1561 3497
1562 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 3498 EV_FREQUENT_CHECK;
3499
3500 ev_io_stop (EV_A_ &w->io);
3501 ev_prepare_stop (EV_A_ &w->prepare);
3502 ev_fork_stop (EV_A_ &w->fork);
3503
1563 ev_stop (EV_A_ (W)w); 3504 ev_stop (EV_A_ (W)w);
3505
3506 EV_FREQUENT_CHECK;
1564} 3507}
3508#endif
3509
3510#if EV_FORK_ENABLE
3511void
3512ev_fork_start (EV_P_ ev_fork *w)
3513{
3514 if (expect_false (ev_is_active (w)))
3515 return;
3516
3517 EV_FREQUENT_CHECK;
3518
3519 ev_start (EV_A_ (W)w, ++forkcnt);
3520 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3521 forks [forkcnt - 1] = w;
3522
3523 EV_FREQUENT_CHECK;
3524}
3525
3526void
3527ev_fork_stop (EV_P_ ev_fork *w)
3528{
3529 clear_pending (EV_A_ (W)w);
3530 if (expect_false (!ev_is_active (w)))
3531 return;
3532
3533 EV_FREQUENT_CHECK;
3534
3535 {
3536 int active = ev_active (w);
3537
3538 forks [active - 1] = forks [--forkcnt];
3539 ev_active (forks [active - 1]) = active;
3540 }
3541
3542 ev_stop (EV_A_ (W)w);
3543
3544 EV_FREQUENT_CHECK;
3545}
3546#endif
3547
3548#if EV_ASYNC_ENABLE
3549void
3550ev_async_start (EV_P_ ev_async *w)
3551{
3552 if (expect_false (ev_is_active (w)))
3553 return;
3554
3555 evpipe_init (EV_A);
3556
3557 EV_FREQUENT_CHECK;
3558
3559 ev_start (EV_A_ (W)w, ++asynccnt);
3560 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3561 asyncs [asynccnt - 1] = w;
3562
3563 EV_FREQUENT_CHECK;
3564}
3565
3566void
3567ev_async_stop (EV_P_ ev_async *w)
3568{
3569 clear_pending (EV_A_ (W)w);
3570 if (expect_false (!ev_is_active (w)))
3571 return;
3572
3573 EV_FREQUENT_CHECK;
3574
3575 {
3576 int active = ev_active (w);
3577
3578 asyncs [active - 1] = asyncs [--asynccnt];
3579 ev_active (asyncs [active - 1]) = active;
3580 }
3581
3582 ev_stop (EV_A_ (W)w);
3583
3584 EV_FREQUENT_CHECK;
3585}
3586
3587void
3588ev_async_send (EV_P_ ev_async *w)
3589{
3590 w->sent = 1;
3591 evpipe_write (EV_A_ &async_pending);
3592}
3593#endif
1565 3594
1566/*****************************************************************************/ 3595/*****************************************************************************/
1567 3596
1568struct ev_once 3597struct ev_once
1569{ 3598{
1570 struct ev_io io; 3599 ev_io io;
1571 struct ev_timer to; 3600 ev_timer to;
1572 void (*cb)(int revents, void *arg); 3601 void (*cb)(int revents, void *arg);
1573 void *arg; 3602 void *arg;
1574}; 3603};
1575 3604
1576static void 3605static void
1577once_cb (EV_P_ struct ev_once *once, int revents) 3606once_cb (EV_P_ struct ev_once *once, int revents)
1578{ 3607{
1579 void (*cb)(int revents, void *arg) = once->cb; 3608 void (*cb)(int revents, void *arg) = once->cb;
1580 void *arg = once->arg; 3609 void *arg = once->arg;
1581 3610
1582 ev_io_stop (EV_A_ &once->io); 3611 ev_io_stop (EV_A_ &once->io);
1583 ev_timer_stop (EV_A_ &once->to); 3612 ev_timer_stop (EV_A_ &once->to);
1584 ev_free (once); 3613 ev_free (once);
1585 3614
1586 cb (revents, arg); 3615 cb (revents, arg);
1587} 3616}
1588 3617
1589static void 3618static void
1590once_cb_io (EV_P_ struct ev_io *w, int revents) 3619once_cb_io (EV_P_ ev_io *w, int revents)
1591{ 3620{
1592 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3621 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3622
3623 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1593} 3624}
1594 3625
1595static void 3626static void
1596once_cb_to (EV_P_ struct ev_timer *w, int revents) 3627once_cb_to (EV_P_ ev_timer *w, int revents)
1597{ 3628{
1598 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3629 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3630
3631 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1599} 3632}
1600 3633
1601void 3634void
1602ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3635ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1603{ 3636{
1604 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3637 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1605 3638
1606 if (!once) 3639 if (expect_false (!once))
3640 {
1607 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3641 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1608 else 3642 return;
1609 { 3643 }
3644
1610 once->cb = cb; 3645 once->cb = cb;
1611 once->arg = arg; 3646 once->arg = arg;
1612 3647
1613 ev_init (&once->io, once_cb_io); 3648 ev_init (&once->io, once_cb_io);
1614 if (fd >= 0) 3649 if (fd >= 0)
3650 {
3651 ev_io_set (&once->io, fd, events);
3652 ev_io_start (EV_A_ &once->io);
3653 }
3654
3655 ev_init (&once->to, once_cb_to);
3656 if (timeout >= 0.)
3657 {
3658 ev_timer_set (&once->to, timeout, 0.);
3659 ev_timer_start (EV_A_ &once->to);
3660 }
3661}
3662
3663/*****************************************************************************/
3664
3665#if EV_WALK_ENABLE
3666void
3667ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3668{
3669 int i, j;
3670 ev_watcher_list *wl, *wn;
3671
3672 if (types & (EV_IO | EV_EMBED))
3673 for (i = 0; i < anfdmax; ++i)
3674 for (wl = anfds [i].head; wl; )
1615 { 3675 {
1616 ev_io_set (&once->io, fd, events); 3676 wn = wl->next;
1617 ev_io_start (EV_A_ &once->io); 3677
3678#if EV_EMBED_ENABLE
3679 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3680 {
3681 if (types & EV_EMBED)
3682 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3683 }
3684 else
3685#endif
3686#if EV_USE_INOTIFY
3687 if (ev_cb ((ev_io *)wl) == infy_cb)
3688 ;
3689 else
3690#endif
3691 if ((ev_io *)wl != &pipe_w)
3692 if (types & EV_IO)
3693 cb (EV_A_ EV_IO, wl);
3694
3695 wl = wn;
1618 } 3696 }
1619 3697
1620 ev_init (&once->to, once_cb_to); 3698 if (types & (EV_TIMER | EV_STAT))
1621 if (timeout >= 0.) 3699 for (i = timercnt + HEAP0; i-- > HEAP0; )
3700#if EV_STAT_ENABLE
3701 /*TODO: timer is not always active*/
3702 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1622 { 3703 {
1623 ev_timer_set (&once->to, timeout, 0.); 3704 if (types & EV_STAT)
1624 ev_timer_start (EV_A_ &once->to); 3705 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1625 } 3706 }
1626 } 3707 else
3708#endif
3709 if (types & EV_TIMER)
3710 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3711
3712#if EV_PERIODIC_ENABLE
3713 if (types & EV_PERIODIC)
3714 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3715 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3716#endif
3717
3718#if EV_IDLE_ENABLE
3719 if (types & EV_IDLE)
3720 for (j = NUMPRI; i--; )
3721 for (i = idlecnt [j]; i--; )
3722 cb (EV_A_ EV_IDLE, idles [j][i]);
3723#endif
3724
3725#if EV_FORK_ENABLE
3726 if (types & EV_FORK)
3727 for (i = forkcnt; i--; )
3728 if (ev_cb (forks [i]) != embed_fork_cb)
3729 cb (EV_A_ EV_FORK, forks [i]);
3730#endif
3731
3732#if EV_ASYNC_ENABLE
3733 if (types & EV_ASYNC)
3734 for (i = asynccnt; i--; )
3735 cb (EV_A_ EV_ASYNC, asyncs [i]);
3736#endif
3737
3738#if EV_PREPARE_ENABLE
3739 if (types & EV_PREPARE)
3740 for (i = preparecnt; i--; )
3741# if EV_EMBED_ENABLE
3742 if (ev_cb (prepares [i]) != embed_prepare_cb)
3743# endif
3744 cb (EV_A_ EV_PREPARE, prepares [i]);
3745#endif
3746
3747#if EV_CHECK_ENABLE
3748 if (types & EV_CHECK)
3749 for (i = checkcnt; i--; )
3750 cb (EV_A_ EV_CHECK, checks [i]);
3751#endif
3752
3753#if EV_SIGNAL_ENABLE
3754 if (types & EV_SIGNAL)
3755 for (i = 0; i < EV_NSIG - 1; ++i)
3756 for (wl = signals [i].head; wl; )
3757 {
3758 wn = wl->next;
3759 cb (EV_A_ EV_SIGNAL, wl);
3760 wl = wn;
3761 }
3762#endif
3763
3764#if EV_CHILD_ENABLE
3765 if (types & EV_CHILD)
3766 for (i = (EV_PID_HASHSIZE); i--; )
3767 for (wl = childs [i]; wl; )
3768 {
3769 wn = wl->next;
3770 cb (EV_A_ EV_CHILD, wl);
3771 wl = wn;
3772 }
3773#endif
3774/* EV_STAT 0x00001000 /* stat data changed */
3775/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
1627} 3776}
3777#endif
3778
3779#if EV_MULTIPLICITY
3780 #include "ev_wrap.h"
3781#endif
1628 3782
1629#ifdef __cplusplus 3783#ifdef __cplusplus
1630} 3784}
1631#endif 3785#endif
1632 3786

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