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Comparing libev/ev.c (file contents):
Revision 1.82 by root, Fri Nov 9 20:55:09 2007 UTC vs.
Revision 1.324 by root, Sat Jan 23 20:15:57 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 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 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
31#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
32# 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
33 65
34# if HAVE_CLOCK_GETTIME 66# if HAVE_CLOCK_GETTIME
67# ifndef EV_USE_MONOTONIC
35# define EV_USE_MONOTONIC 1 68# define EV_USE_MONOTONIC 1
69# endif
70# ifndef EV_USE_REALTIME
36# define EV_USE_REALTIME 1 71# define EV_USE_REALTIME 0
37# endif 72# endif
73# else
74# ifndef EV_USE_MONOTONIC
75# define EV_USE_MONOTONIC 0
76# endif
77# ifndef EV_USE_REALTIME
78# define EV_USE_REALTIME 0
79# endif
80# endif
38 81
82# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
84# define EV_USE_NANOSLEEP 1
85# else
86# define EV_USE_NANOSLEEP 0
87# endif
88# endif
89
90# ifndef EV_USE_SELECT
39# if HAVE_SELECT && HAVE_SYS_SELECT_H 91# if HAVE_SELECT && HAVE_SYS_SELECT_H
40# define EV_USE_SELECT 1 92# define EV_USE_SELECT 1
93# else
94# define EV_USE_SELECT 0
41# endif 95# endif
96# endif
42 97
98# ifndef EV_USE_POLL
43# if HAVE_POLL && HAVE_POLL_H 99# if HAVE_POLL && HAVE_POLL_H
44# define EV_USE_POLL 1 100# define EV_USE_POLL 1
101# else
102# define EV_USE_POLL 0
45# endif 103# endif
46 104# endif
105
106# ifndef EV_USE_EPOLL
47# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 107# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
48# define EV_USE_EPOLL 1 108# define EV_USE_EPOLL 1
109# else
110# define EV_USE_EPOLL 0
49# endif 111# endif
50 112# endif
51# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 113
114# ifndef EV_USE_KQUEUE
115# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
52# define EV_USE_KQUEUE 1 116# define EV_USE_KQUEUE 1
117# else
118# define EV_USE_KQUEUE 0
53# endif 119# endif
120# endif
121
122# ifndef EV_USE_PORT
123# if HAVE_PORT_H && HAVE_PORT_CREATE
124# define EV_USE_PORT 1
125# else
126# define EV_USE_PORT 0
127# endif
128# endif
54 129
130# ifndef EV_USE_INOTIFY
131# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
132# define EV_USE_INOTIFY 1
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 1
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 1
149# else
150# define EV_USE_EVENTFD 0
151# endif
152# endif
153
55#endif 154#endif
56 155
57#include <math.h> 156#include <math.h>
58#include <stdlib.h> 157#include <stdlib.h>
158#include <string.h>
59#include <fcntl.h> 159#include <fcntl.h>
60#include <stddef.h> 160#include <stddef.h>
61 161
62#include <stdio.h> 162#include <stdio.h>
63 163
… …
66#include <sys/types.h> 166#include <sys/types.h>
67#include <time.h> 167#include <time.h>
68 168
69#include <signal.h> 169#include <signal.h>
70 170
71#ifndef WIN32
72# include <unistd.h>
73# include <sys/time.h>
74# include <sys/wait.h>
75#endif
76/**/
77
78#ifndef EV_USE_MONOTONIC
79# define EV_USE_MONOTONIC 1
80#endif
81
82#ifndef EV_USE_SELECT
83# define EV_USE_SELECT 1
84#endif
85
86#ifndef EV_USE_POLL
87# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
88#endif
89
90#ifndef EV_USE_EPOLL
91# define EV_USE_EPOLL 0
92#endif
93
94#ifndef EV_USE_KQUEUE
95# define EV_USE_KQUEUE 0
96#endif
97
98#ifndef EV_USE_WIN32
99# ifdef WIN32
100# define EV_USE_WIN32 0 /* it does not exist, use select */
101# undef EV_USE_SELECT
102# define EV_USE_SELECT 1
103# else
104# define EV_USE_WIN32 0
105# endif
106#endif
107
108#ifndef EV_USE_REALTIME
109# define EV_USE_REALTIME 1
110#endif
111
112/**/
113
114#ifndef CLOCK_MONOTONIC
115# undef EV_USE_MONOTONIC
116# define EV_USE_MONOTONIC 0
117#endif
118
119#ifndef CLOCK_REALTIME
120# undef EV_USE_REALTIME
121# define EV_USE_REALTIME 0
122#endif
123
124/**/
125
126#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
127#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
128#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
129/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
130
131#ifdef EV_H 171#ifdef EV_H
132# include EV_H 172# include EV_H
133#else 173#else
134# include "ev.h" 174# include "ev.h"
135#endif 175#endif
136 176
177#ifndef _WIN32
178# include <sys/time.h>
179# include <sys/wait.h>
180# include <unistd.h>
181#else
182# include <io.h>
183# define WIN32_LEAN_AND_MEAN
184# include <windows.h>
185# ifndef EV_SELECT_IS_WINSOCKET
186# define EV_SELECT_IS_WINSOCKET 1
187# endif
188#endif
189
190/* this block tries to deduce configuration from header-defined symbols and defaults */
191
192/* try to deduce the maximum number of signals on this platform */
193#if defined (EV_NSIG)
194/* use what's provided */
195#elif defined (NSIG)
196# define EV_NSIG (NSIG)
197#elif defined(_NSIG)
198# define EV_NSIG (_NSIG)
199#elif defined (SIGMAX)
200# define EV_NSIG (SIGMAX+1)
201#elif defined (SIG_MAX)
202# define EV_NSIG (SIG_MAX+1)
203#elif defined (_SIG_MAX)
204# define EV_NSIG (_SIG_MAX+1)
205#elif defined (MAXSIG)
206# define EV_NSIG (MAXSIG+1)
207#elif defined (MAX_SIG)
208# define EV_NSIG (MAX_SIG+1)
209#elif defined (SIGARRAYSIZE)
210# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */
211#elif defined (_sys_nsig)
212# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
213#else
214# error "unable to find value for NSIG, please report"
215/* to make it compile regardless, just remove the above line */
216# define EV_NSIG 65
217#endif
218
219#ifndef EV_USE_CLOCK_SYSCALL
220# if __linux && __GLIBC__ >= 2
221# define EV_USE_CLOCK_SYSCALL 1
222# else
223# define EV_USE_CLOCK_SYSCALL 0
224# endif
225#endif
226
227#ifndef EV_USE_MONOTONIC
228# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
229# define EV_USE_MONOTONIC 1
230# else
231# define EV_USE_MONOTONIC 0
232# endif
233#endif
234
235#ifndef EV_USE_REALTIME
236# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
237#endif
238
239#ifndef EV_USE_NANOSLEEP
240# if _POSIX_C_SOURCE >= 199309L
241# define EV_USE_NANOSLEEP 1
242# else
243# define EV_USE_NANOSLEEP 0
244# endif
245#endif
246
247#ifndef EV_USE_SELECT
248# define EV_USE_SELECT 1
249#endif
250
251#ifndef EV_USE_POLL
252# ifdef _WIN32
253# define EV_USE_POLL 0
254# else
255# define EV_USE_POLL 1
256# endif
257#endif
258
259#ifndef EV_USE_EPOLL
260# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
261# define EV_USE_EPOLL 1
262# else
263# define EV_USE_EPOLL 0
264# endif
265#endif
266
267#ifndef EV_USE_KQUEUE
268# define EV_USE_KQUEUE 0
269#endif
270
271#ifndef EV_USE_PORT
272# define EV_USE_PORT 0
273#endif
274
275#ifndef EV_USE_INOTIFY
276# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
277# define EV_USE_INOTIFY 1
278# else
279# define EV_USE_INOTIFY 0
280# endif
281#endif
282
283#ifndef EV_PID_HASHSIZE
284# if EV_MINIMAL
285# define EV_PID_HASHSIZE 1
286# else
287# define EV_PID_HASHSIZE 16
288# endif
289#endif
290
291#ifndef EV_INOTIFY_HASHSIZE
292# if EV_MINIMAL
293# define EV_INOTIFY_HASHSIZE 1
294# else
295# define EV_INOTIFY_HASHSIZE 16
296# endif
297#endif
298
299#ifndef EV_USE_EVENTFD
300# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
301# define EV_USE_EVENTFD 1
302# else
303# define EV_USE_EVENTFD 0
304# endif
305#endif
306
307#ifndef EV_USE_SIGNALFD
308# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
309# define EV_USE_SIGNALFD 1
310# else
311# define EV_USE_SIGNALFD 0
312# endif
313#endif
314
315#if 0 /* debugging */
316# define EV_VERIFY 3
317# define EV_USE_4HEAP 1
318# define EV_HEAP_CACHE_AT 1
319#endif
320
321#ifndef EV_VERIFY
322# define EV_VERIFY !EV_MINIMAL
323#endif
324
325#ifndef EV_USE_4HEAP
326# define EV_USE_4HEAP !EV_MINIMAL
327#endif
328
329#ifndef EV_HEAP_CACHE_AT
330# define EV_HEAP_CACHE_AT !EV_MINIMAL
331#endif
332
333/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
334/* which makes programs even slower. might work on other unices, too. */
335#if EV_USE_CLOCK_SYSCALL
336# include <syscall.h>
337# ifdef SYS_clock_gettime
338# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
339# undef EV_USE_MONOTONIC
340# define EV_USE_MONOTONIC 1
341# else
342# undef EV_USE_CLOCK_SYSCALL
343# define EV_USE_CLOCK_SYSCALL 0
344# endif
345#endif
346
347/* this block fixes any misconfiguration where we know we run into trouble otherwise */
348
349#ifndef CLOCK_MONOTONIC
350# undef EV_USE_MONOTONIC
351# define EV_USE_MONOTONIC 0
352#endif
353
354#ifndef CLOCK_REALTIME
355# undef EV_USE_REALTIME
356# define EV_USE_REALTIME 0
357#endif
358
359#if !EV_STAT_ENABLE
360# undef EV_USE_INOTIFY
361# define EV_USE_INOTIFY 0
362#endif
363
364#if !EV_USE_NANOSLEEP
365# ifndef _WIN32
366# include <sys/select.h>
367# endif
368#endif
369
370#if EV_USE_INOTIFY
371# include <sys/utsname.h>
372# include <sys/statfs.h>
373# include <sys/inotify.h>
374/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
375# ifndef IN_DONT_FOLLOW
376# undef EV_USE_INOTIFY
377# define EV_USE_INOTIFY 0
378# endif
379#endif
380
381#if EV_SELECT_IS_WINSOCKET
382# include <winsock.h>
383#endif
384
385#if EV_USE_EVENTFD
386/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
387# include <stdint.h>
388# ifndef EFD_NONBLOCK
389# define EFD_NONBLOCK O_NONBLOCK
390# endif
391# ifndef EFD_CLOEXEC
392# ifdef O_CLOEXEC
393# define EFD_CLOEXEC O_CLOEXEC
394# else
395# define EFD_CLOEXEC 02000000
396# endif
397# endif
398# ifdef __cplusplus
399extern "C" {
400# endif
401int eventfd (unsigned int initval, int flags);
402# ifdef __cplusplus
403}
404# endif
405#endif
406
407#if EV_USE_SIGNALFD
408/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
409# include <stdint.h>
410# ifndef SFD_NONBLOCK
411# define SFD_NONBLOCK O_NONBLOCK
412# endif
413# ifndef SFD_CLOEXEC
414# ifdef O_CLOEXEC
415# define SFD_CLOEXEC O_CLOEXEC
416# else
417# define SFD_CLOEXEC 02000000
418# endif
419# endif
420# ifdef __cplusplus
421extern "C" {
422# endif
423int signalfd (int fd, const sigset_t *mask, int flags);
424
425struct signalfd_siginfo
426{
427 uint32_t ssi_signo;
428 char pad[128 - sizeof (uint32_t)];
429};
430# ifdef __cplusplus
431}
432# endif
433#endif
434
435
436/**/
437
438#if EV_VERIFY >= 3
439# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
440#else
441# define EV_FREQUENT_CHECK do { } while (0)
442#endif
443
444/*
445 * This is used to avoid floating point rounding problems.
446 * It is added to ev_rt_now when scheduling periodics
447 * to ensure progress, time-wise, even when rounding
448 * errors are against us.
449 * This value is good at least till the year 4000.
450 * Better solutions welcome.
451 */
452#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
453
454#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
455#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
456
137#if __GNUC__ >= 3 457#if __GNUC__ >= 4
138# define expect(expr,value) __builtin_expect ((expr),(value)) 458# define expect(expr,value) __builtin_expect ((expr),(value))
139# define inline inline 459# define noinline __attribute__ ((noinline))
140#else 460#else
141# define expect(expr,value) (expr) 461# define expect(expr,value) (expr)
142# define inline static 462# define noinline
463# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
464# define inline
465# endif
143#endif 466#endif
144 467
145#define expect_false(expr) expect ((expr) != 0, 0) 468#define expect_false(expr) expect ((expr) != 0, 0)
146#define expect_true(expr) expect ((expr) != 0, 1) 469#define expect_true(expr) expect ((expr) != 0, 1)
470#define inline_size static inline
147 471
472#if EV_MINIMAL
473# define inline_speed static noinline
474#else
475# define inline_speed static inline
476#endif
477
148#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 478#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
479
480#if EV_MINPRI == EV_MAXPRI
481# define ABSPRI(w) (((W)w), 0)
482#else
149#define ABSPRI(w) ((w)->priority - EV_MINPRI) 483# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
484#endif
150 485
486#define EMPTY /* required for microsofts broken pseudo-c compiler */
487#define EMPTY2(a,b) /* used to suppress some warnings */
488
151typedef struct ev_watcher *W; 489typedef ev_watcher *W;
152typedef struct ev_watcher_list *WL; 490typedef ev_watcher_list *WL;
153typedef struct ev_watcher_time *WT; 491typedef ev_watcher_time *WT;
154 492
493#define ev_active(w) ((W)(w))->active
494#define ev_at(w) ((WT)(w))->at
495
496#if EV_USE_REALTIME
497/* sig_atomic_t is used to avoid per-thread variables or locking but still */
498/* giving it a reasonably high chance of working on typical architetcures */
499static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
500#endif
501
502#if EV_USE_MONOTONIC
155static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 503static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
504#endif
156 505
506#ifndef EV_FD_TO_WIN32_HANDLE
507# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
508#endif
509#ifndef EV_WIN32_HANDLE_TO_FD
510# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
511#endif
512#ifndef EV_WIN32_CLOSE_FD
513# define EV_WIN32_CLOSE_FD(fd) close (fd)
514#endif
515
516#ifdef _WIN32
157#include "ev_win32.c" 517# include "ev_win32.c"
518#endif
158 519
159/*****************************************************************************/ 520/*****************************************************************************/
160 521
161static void (*syserr_cb)(const char *msg); 522static void (*syserr_cb)(const char *msg);
162 523
524void
163void ev_set_syserr_cb (void (*cb)(const char *msg)) 525ev_set_syserr_cb (void (*cb)(const char *msg))
164{ 526{
165 syserr_cb = cb; 527 syserr_cb = cb;
166} 528}
167 529
168static void 530static void noinline
169syserr (const char *msg) 531ev_syserr (const char *msg)
170{ 532{
171 if (!msg) 533 if (!msg)
172 msg = "(libev) system error"; 534 msg = "(libev) system error";
173 535
174 if (syserr_cb) 536 if (syserr_cb)
… …
178 perror (msg); 540 perror (msg);
179 abort (); 541 abort ();
180 } 542 }
181} 543}
182 544
545static void *
546ev_realloc_emul (void *ptr, long size)
547{
548 /* some systems, notably openbsd and darwin, fail to properly
549 * implement realloc (x, 0) (as required by both ansi c-98 and
550 * the single unix specification, so work around them here.
551 */
552
553 if (size)
554 return realloc (ptr, size);
555
556 free (ptr);
557 return 0;
558}
559
183static void *(*alloc)(void *ptr, long size); 560static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
184 561
562void
185void ev_set_allocator (void *(*cb)(void *ptr, long size)) 563ev_set_allocator (void *(*cb)(void *ptr, long size))
186{ 564{
187 alloc = cb; 565 alloc = cb;
188} 566}
189 567
190static void * 568inline_speed void *
191ev_realloc (void *ptr, long size) 569ev_realloc (void *ptr, long size)
192{ 570{
193 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 571 ptr = alloc (ptr, size);
194 572
195 if (!ptr && size) 573 if (!ptr && size)
196 { 574 {
197 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 575 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
198 abort (); 576 abort ();
… …
204#define ev_malloc(size) ev_realloc (0, (size)) 582#define ev_malloc(size) ev_realloc (0, (size))
205#define ev_free(ptr) ev_realloc ((ptr), 0) 583#define ev_free(ptr) ev_realloc ((ptr), 0)
206 584
207/*****************************************************************************/ 585/*****************************************************************************/
208 586
587/* set in reify when reification needed */
588#define EV_ANFD_REIFY 1
589
590/* file descriptor info structure */
209typedef struct 591typedef struct
210{ 592{
211 WL head; 593 WL head;
212 unsigned char events; 594 unsigned char events; /* the events watched for */
595 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
596 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
213 unsigned char reify; 597 unsigned char unused;
598#if EV_USE_EPOLL
599 unsigned int egen; /* generation counter to counter epoll bugs */
600#endif
601#if EV_SELECT_IS_WINSOCKET
602 SOCKET handle;
603#endif
214} ANFD; 604} ANFD;
215 605
606/* stores the pending event set for a given watcher */
216typedef struct 607typedef struct
217{ 608{
218 W w; 609 W w;
219 int events; 610 int events; /* the pending event set for the given watcher */
220} ANPENDING; 611} ANPENDING;
612
613#if EV_USE_INOTIFY
614/* hash table entry per inotify-id */
615typedef struct
616{
617 WL head;
618} ANFS;
619#endif
620
621/* Heap Entry */
622#if EV_HEAP_CACHE_AT
623 /* a heap element */
624 typedef struct {
625 ev_tstamp at;
626 WT w;
627 } ANHE;
628
629 #define ANHE_w(he) (he).w /* access watcher, read-write */
630 #define ANHE_at(he) (he).at /* access cached at, read-only */
631 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
632#else
633 /* a heap element */
634 typedef WT ANHE;
635
636 #define ANHE_w(he) (he)
637 #define ANHE_at(he) (he)->at
638 #define ANHE_at_cache(he)
639#endif
221 640
222#if EV_MULTIPLICITY 641#if EV_MULTIPLICITY
223 642
224 struct ev_loop 643 struct ev_loop
225 { 644 {
645 ev_tstamp ev_rt_now;
646 #define ev_rt_now ((loop)->ev_rt_now)
226 #define VAR(name,decl) decl; 647 #define VAR(name,decl) decl;
227 #include "ev_vars.h" 648 #include "ev_vars.h"
228 #undef VAR 649 #undef VAR
229 }; 650 };
230 #include "ev_wrap.h" 651 #include "ev_wrap.h"
231 652
232 struct ev_loop default_loop_struct; 653 static struct ev_loop default_loop_struct;
233 static struct ev_loop *default_loop; 654 struct ev_loop *ev_default_loop_ptr;
234 655
235#else 656#else
236 657
658 ev_tstamp ev_rt_now;
237 #define VAR(name,decl) static decl; 659 #define VAR(name,decl) static decl;
238 #include "ev_vars.h" 660 #include "ev_vars.h"
239 #undef VAR 661 #undef VAR
240 662
241 static int default_loop; 663 static int ev_default_loop_ptr;
242 664
243#endif 665#endif
666
667#if EV_MINIMAL < 2
668# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
669# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
670# define EV_INVOKE_PENDING invoke_cb (EV_A)
671#else
672# define EV_RELEASE_CB (void)0
673# define EV_ACQUIRE_CB (void)0
674# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
675#endif
676
677#define EVUNLOOP_RECURSE 0x80
244 678
245/*****************************************************************************/ 679/*****************************************************************************/
246 680
247inline ev_tstamp 681#ifndef EV_HAVE_EV_TIME
682ev_tstamp
248ev_time (void) 683ev_time (void)
249{ 684{
250#if EV_USE_REALTIME 685#if EV_USE_REALTIME
686 if (expect_true (have_realtime))
687 {
251 struct timespec ts; 688 struct timespec ts;
252 clock_gettime (CLOCK_REALTIME, &ts); 689 clock_gettime (CLOCK_REALTIME, &ts);
253 return ts.tv_sec + ts.tv_nsec * 1e-9; 690 return ts.tv_sec + ts.tv_nsec * 1e-9;
254#else 691 }
692#endif
693
255 struct timeval tv; 694 struct timeval tv;
256 gettimeofday (&tv, 0); 695 gettimeofday (&tv, 0);
257 return tv.tv_sec + tv.tv_usec * 1e-6; 696 return tv.tv_sec + tv.tv_usec * 1e-6;
258#endif
259} 697}
698#endif
260 699
261inline ev_tstamp 700inline_size ev_tstamp
262get_clock (void) 701get_clock (void)
263{ 702{
264#if EV_USE_MONOTONIC 703#if EV_USE_MONOTONIC
265 if (expect_true (have_monotonic)) 704 if (expect_true (have_monotonic))
266 { 705 {
… …
271#endif 710#endif
272 711
273 return ev_time (); 712 return ev_time ();
274} 713}
275 714
715#if EV_MULTIPLICITY
276ev_tstamp 716ev_tstamp
277ev_now (EV_P) 717ev_now (EV_P)
278{ 718{
279 return rt_now; 719 return ev_rt_now;
280} 720}
721#endif
281 722
282#define array_roundsize(type,n) ((n) | 4 & ~3) 723void
724ev_sleep (ev_tstamp delay)
725{
726 if (delay > 0.)
727 {
728#if EV_USE_NANOSLEEP
729 struct timespec ts;
730
731 ts.tv_sec = (time_t)delay;
732 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
733
734 nanosleep (&ts, 0);
735#elif defined(_WIN32)
736 Sleep ((unsigned long)(delay * 1e3));
737#else
738 struct timeval tv;
739
740 tv.tv_sec = (time_t)delay;
741 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
742
743 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
744 /* something not guaranteed by newer posix versions, but guaranteed */
745 /* by older ones */
746 select (0, 0, 0, 0, &tv);
747#endif
748 }
749}
750
751/*****************************************************************************/
752
753#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
754
755/* find a suitable new size for the given array, */
756/* hopefully by rounding to a ncie-to-malloc size */
757inline_size int
758array_nextsize (int elem, int cur, int cnt)
759{
760 int ncur = cur + 1;
761
762 do
763 ncur <<= 1;
764 while (cnt > ncur);
765
766 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
767 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
768 {
769 ncur *= elem;
770 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
771 ncur = ncur - sizeof (void *) * 4;
772 ncur /= elem;
773 }
774
775 return ncur;
776}
777
778static noinline void *
779array_realloc (int elem, void *base, int *cur, int cnt)
780{
781 *cur = array_nextsize (elem, *cur, cnt);
782 return ev_realloc (base, elem * *cur);
783}
784
785#define array_init_zero(base,count) \
786 memset ((void *)(base), 0, sizeof (*(base)) * (count))
283 787
284#define array_needsize(type,base,cur,cnt,init) \ 788#define array_needsize(type,base,cur,cnt,init) \
285 if (expect_false ((cnt) > cur)) \ 789 if (expect_false ((cnt) > (cur))) \
286 { \ 790 { \
287 int newcnt = cur; \ 791 int ocur_ = (cur); \
288 do \ 792 (base) = (type *)array_realloc \
289 { \ 793 (sizeof (type), (base), &(cur), (cnt)); \
290 newcnt = array_roundsize (type, newcnt << 1); \ 794 init ((base) + (ocur_), (cur) - ocur_); \
291 } \
292 while ((cnt) > newcnt); \
293 \
294 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
295 init (base + cur, newcnt - cur); \
296 cur = newcnt; \
297 } 795 }
298 796
797#if 0
299#define array_slim(type,stem) \ 798#define array_slim(type,stem) \
300 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 799 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
301 { \ 800 { \
302 stem ## max = array_roundsize (stem ## cnt >> 1); \ 801 stem ## max = array_roundsize (stem ## cnt >> 1); \
303 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 802 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
304 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 803 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
305 } 804 }
306 805#endif
307/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
308/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
309#define array_free_microshit(stem) \
310 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
311 806
312#define array_free(stem, idx) \ 807#define array_free(stem, idx) \
313 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 808 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
314 809
315/*****************************************************************************/ 810/*****************************************************************************/
316 811
317static void 812/* dummy callback for pending events */
318anfds_init (ANFD *base, int count) 813static void noinline
814pendingcb (EV_P_ ev_prepare *w, int revents)
319{ 815{
320 while (count--)
321 {
322 base->head = 0;
323 base->events = EV_NONE;
324 base->reify = 0;
325
326 ++base;
327 }
328} 816}
329 817
330void 818void noinline
331ev_feed_event (EV_P_ void *w, int revents) 819ev_feed_event (EV_P_ void *w, int revents)
332{ 820{
333 W w_ = (W)w; 821 W w_ = (W)w;
822 int pri = ABSPRI (w_);
334 823
335 if (w_->pending) 824 if (expect_false (w_->pending))
825 pendings [pri][w_->pending - 1].events |= revents;
826 else
336 { 827 {
828 w_->pending = ++pendingcnt [pri];
829 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
830 pendings [pri][w_->pending - 1].w = w_;
337 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 831 pendings [pri][w_->pending - 1].events = revents;
338 return;
339 } 832 }
340
341 w_->pending = ++pendingcnt [ABSPRI (w_)];
342 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
343 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
344 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
345} 833}
346 834
347static void 835inline_speed void
836feed_reverse (EV_P_ W w)
837{
838 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
839 rfeeds [rfeedcnt++] = w;
840}
841
842inline_size void
843feed_reverse_done (EV_P_ int revents)
844{
845 do
846 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
847 while (rfeedcnt);
848}
849
850inline_speed void
348queue_events (EV_P_ W *events, int eventcnt, int type) 851queue_events (EV_P_ W *events, int eventcnt, int type)
349{ 852{
350 int i; 853 int i;
351 854
352 for (i = 0; i < eventcnt; ++i) 855 for (i = 0; i < eventcnt; ++i)
353 ev_feed_event (EV_A_ events [i], type); 856 ev_feed_event (EV_A_ events [i], type);
354} 857}
355 858
859/*****************************************************************************/
860
356inline void 861inline_speed void
357fd_event (EV_P_ int fd, int revents) 862fd_event_nc (EV_P_ int fd, int revents)
358{ 863{
359 ANFD *anfd = anfds + fd; 864 ANFD *anfd = anfds + fd;
360 struct ev_io *w; 865 ev_io *w;
361 866
362 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 867 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
363 { 868 {
364 int ev = w->events & revents; 869 int ev = w->events & revents;
365 870
366 if (ev) 871 if (ev)
367 ev_feed_event (EV_A_ (W)w, ev); 872 ev_feed_event (EV_A_ (W)w, ev);
368 } 873 }
369} 874}
370 875
876/* do not submit kernel events for fds that have reify set */
877/* because that means they changed while we were polling for new events */
878inline_speed void
879fd_event (EV_P_ int fd, int revents)
880{
881 ANFD *anfd = anfds + fd;
882
883 if (expect_true (!anfd->reify))
884 fd_event_nc (EV_A_ fd, revents);
885}
886
371void 887void
372ev_feed_fd_event (EV_P_ int fd, int revents) 888ev_feed_fd_event (EV_P_ int fd, int revents)
373{ 889{
890 if (fd >= 0 && fd < anfdmax)
374 fd_event (EV_A_ fd, revents); 891 fd_event_nc (EV_A_ fd, revents);
375} 892}
376 893
377/*****************************************************************************/ 894/* make sure the external fd watch events are in-sync */
378 895/* with the kernel/libev internal state */
379static void 896inline_size void
380fd_reify (EV_P) 897fd_reify (EV_P)
381{ 898{
382 int i; 899 int i;
383 900
384 for (i = 0; i < fdchangecnt; ++i) 901 for (i = 0; i < fdchangecnt; ++i)
385 { 902 {
386 int fd = fdchanges [i]; 903 int fd = fdchanges [i];
387 ANFD *anfd = anfds + fd; 904 ANFD *anfd = anfds + fd;
388 struct ev_io *w; 905 ev_io *w;
389 906
390 int events = 0; 907 unsigned char events = 0;
391 908
392 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 909 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
393 events |= w->events; 910 events |= (unsigned char)w->events;
394 911
912#if EV_SELECT_IS_WINSOCKET
913 if (events)
914 {
915 unsigned long arg;
916 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
917 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
918 }
919#endif
920
921 {
922 unsigned char o_events = anfd->events;
923 unsigned char o_reify = anfd->reify;
924
395 anfd->reify = 0; 925 anfd->reify = 0;
396
397 method_modify (EV_A_ fd, anfd->events, events);
398 anfd->events = events; 926 anfd->events = events;
927
928 if (o_events != events || o_reify & EV__IOFDSET)
929 backend_modify (EV_A_ fd, o_events, events);
930 }
399 } 931 }
400 932
401 fdchangecnt = 0; 933 fdchangecnt = 0;
402} 934}
403 935
404static void 936/* something about the given fd changed */
937inline_size void
405fd_change (EV_P_ int fd) 938fd_change (EV_P_ int fd, int flags)
406{ 939{
407 if (anfds [fd].reify) 940 unsigned char reify = anfds [fd].reify;
408 return;
409
410 anfds [fd].reify = 1; 941 anfds [fd].reify |= flags;
411 942
943 if (expect_true (!reify))
944 {
412 ++fdchangecnt; 945 ++fdchangecnt;
413 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); 946 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
414 fdchanges [fdchangecnt - 1] = fd; 947 fdchanges [fdchangecnt - 1] = fd;
948 }
415} 949}
416 950
417static void 951/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
952inline_speed void
418fd_kill (EV_P_ int fd) 953fd_kill (EV_P_ int fd)
419{ 954{
420 struct ev_io *w; 955 ev_io *w;
421 956
422 while ((w = (struct ev_io *)anfds [fd].head)) 957 while ((w = (ev_io *)anfds [fd].head))
423 { 958 {
424 ev_io_stop (EV_A_ w); 959 ev_io_stop (EV_A_ w);
425 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 960 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
426 } 961 }
427} 962}
428 963
429static int 964/* check whether the given fd is atcually valid, for error recovery */
965inline_size int
430fd_valid (int fd) 966fd_valid (int fd)
431{ 967{
432#ifdef WIN32 968#ifdef _WIN32
433 return !!win32_get_osfhandle (fd); 969 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
434#else 970#else
435 return fcntl (fd, F_GETFD) != -1; 971 return fcntl (fd, F_GETFD) != -1;
436#endif 972#endif
437} 973}
438 974
439/* called on EBADF to verify fds */ 975/* called on EBADF to verify fds */
440static void 976static void noinline
441fd_ebadf (EV_P) 977fd_ebadf (EV_P)
442{ 978{
443 int fd; 979 int fd;
444 980
445 for (fd = 0; fd < anfdmax; ++fd) 981 for (fd = 0; fd < anfdmax; ++fd)
446 if (anfds [fd].events) 982 if (anfds [fd].events)
447 if (!fd_valid (fd) == -1 && errno == EBADF) 983 if (!fd_valid (fd) && errno == EBADF)
448 fd_kill (EV_A_ fd); 984 fd_kill (EV_A_ fd);
449} 985}
450 986
451/* called on ENOMEM in select/poll to kill some fds and retry */ 987/* called on ENOMEM in select/poll to kill some fds and retry */
452static void 988static void noinline
453fd_enomem (EV_P) 989fd_enomem (EV_P)
454{ 990{
455 int fd; 991 int fd;
456 992
457 for (fd = anfdmax; fd--; ) 993 for (fd = anfdmax; fd--; )
458 if (anfds [fd].events) 994 if (anfds [fd].events)
459 { 995 {
460 fd_kill (EV_A_ fd); 996 fd_kill (EV_A_ fd);
461 return; 997 break;
462 } 998 }
463} 999}
464 1000
465/* usually called after fork if method needs to re-arm all fds from scratch */ 1001/* usually called after fork if backend needs to re-arm all fds from scratch */
466static void 1002static void noinline
467fd_rearm_all (EV_P) 1003fd_rearm_all (EV_P)
468{ 1004{
469 int fd; 1005 int fd;
470 1006
471 /* this should be highly optimised to not do anything but set a flag */
472 for (fd = 0; fd < anfdmax; ++fd) 1007 for (fd = 0; fd < anfdmax; ++fd)
473 if (anfds [fd].events) 1008 if (anfds [fd].events)
474 { 1009 {
475 anfds [fd].events = 0; 1010 anfds [fd].events = 0;
476 fd_change (EV_A_ fd); 1011 anfds [fd].emask = 0;
1012 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
477 } 1013 }
478} 1014}
479 1015
480/*****************************************************************************/ 1016/*****************************************************************************/
481 1017
1018/*
1019 * the heap functions want a real array index. array index 0 uis guaranteed to not
1020 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1021 * the branching factor of the d-tree.
1022 */
1023
1024/*
1025 * at the moment we allow libev the luxury of two heaps,
1026 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1027 * which is more cache-efficient.
1028 * the difference is about 5% with 50000+ watchers.
1029 */
1030#if EV_USE_4HEAP
1031
1032#define DHEAP 4
1033#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1034#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1035#define UPHEAP_DONE(p,k) ((p) == (k))
1036
1037/* away from the root */
1038inline_speed void
1039downheap (ANHE *heap, int N, int k)
1040{
1041 ANHE he = heap [k];
1042 ANHE *E = heap + N + HEAP0;
1043
1044 for (;;)
1045 {
1046 ev_tstamp minat;
1047 ANHE *minpos;
1048 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1049
1050 /* find minimum child */
1051 if (expect_true (pos + DHEAP - 1 < E))
1052 {
1053 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1054 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1055 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1056 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1057 }
1058 else if (pos < E)
1059 {
1060 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1061 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1062 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1063 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1064 }
1065 else
1066 break;
1067
1068 if (ANHE_at (he) <= minat)
1069 break;
1070
1071 heap [k] = *minpos;
1072 ev_active (ANHE_w (*minpos)) = k;
1073
1074 k = minpos - heap;
1075 }
1076
1077 heap [k] = he;
1078 ev_active (ANHE_w (he)) = k;
1079}
1080
1081#else /* 4HEAP */
1082
1083#define HEAP0 1
1084#define HPARENT(k) ((k) >> 1)
1085#define UPHEAP_DONE(p,k) (!(p))
1086
1087/* away from the root */
1088inline_speed void
1089downheap (ANHE *heap, int N, int k)
1090{
1091 ANHE he = heap [k];
1092
1093 for (;;)
1094 {
1095 int c = k << 1;
1096
1097 if (c >= N + HEAP0)
1098 break;
1099
1100 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1101 ? 1 : 0;
1102
1103 if (ANHE_at (he) <= ANHE_at (heap [c]))
1104 break;
1105
1106 heap [k] = heap [c];
1107 ev_active (ANHE_w (heap [k])) = k;
1108
1109 k = c;
1110 }
1111
1112 heap [k] = he;
1113 ev_active (ANHE_w (he)) = k;
1114}
1115#endif
1116
1117/* towards the root */
1118inline_speed void
1119upheap (ANHE *heap, int k)
1120{
1121 ANHE he = heap [k];
1122
1123 for (;;)
1124 {
1125 int p = HPARENT (k);
1126
1127 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1128 break;
1129
1130 heap [k] = heap [p];
1131 ev_active (ANHE_w (heap [k])) = k;
1132 k = p;
1133 }
1134
1135 heap [k] = he;
1136 ev_active (ANHE_w (he)) = k;
1137}
1138
1139/* move an element suitably so it is in a correct place */
1140inline_size void
1141adjustheap (ANHE *heap, int N, int k)
1142{
1143 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1144 upheap (heap, k);
1145 else
1146 downheap (heap, N, k);
1147}
1148
1149/* rebuild the heap: this function is used only once and executed rarely */
1150inline_size void
1151reheap (ANHE *heap, int N)
1152{
1153 int i;
1154
1155 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1156 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1157 for (i = 0; i < N; ++i)
1158 upheap (heap, i + HEAP0);
1159}
1160
1161/*****************************************************************************/
1162
1163/* associate signal watchers to a signal signal */
1164typedef struct
1165{
1166 EV_ATOMIC_T pending;
1167#if EV_MULTIPLICITY
1168 EV_P;
1169#endif
1170 WL head;
1171} ANSIG;
1172
1173static ANSIG signals [EV_NSIG - 1];
1174
1175/*****************************************************************************/
1176
1177/* used to prepare libev internal fd's */
1178/* this is not fork-safe */
1179inline_speed void
1180fd_intern (int fd)
1181{
1182#ifdef _WIN32
1183 unsigned long arg = 1;
1184 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1185#else
1186 fcntl (fd, F_SETFD, FD_CLOEXEC);
1187 fcntl (fd, F_SETFL, O_NONBLOCK);
1188#endif
1189}
1190
1191static void noinline
1192evpipe_init (EV_P)
1193{
1194 if (!ev_is_active (&pipe_w))
1195 {
1196#if EV_USE_EVENTFD
1197 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1198 if (evfd < 0 && errno == EINVAL)
1199 evfd = eventfd (0, 0);
1200
1201 if (evfd >= 0)
1202 {
1203 evpipe [0] = -1;
1204 fd_intern (evfd); /* doing it twice doesn't hurt */
1205 ev_io_set (&pipe_w, evfd, EV_READ);
1206 }
1207 else
1208#endif
1209 {
1210 while (pipe (evpipe))
1211 ev_syserr ("(libev) error creating signal/async pipe");
1212
1213 fd_intern (evpipe [0]);
1214 fd_intern (evpipe [1]);
1215 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1216 }
1217
1218 ev_io_start (EV_A_ &pipe_w);
1219 ev_unref (EV_A); /* watcher should not keep loop alive */
1220 }
1221}
1222
1223inline_size void
1224evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1225{
1226 if (!*flag)
1227 {
1228 int old_errno = errno; /* save errno because write might clobber it */
1229
1230 *flag = 1;
1231
1232#if EV_USE_EVENTFD
1233 if (evfd >= 0)
1234 {
1235 uint64_t counter = 1;
1236 write (evfd, &counter, sizeof (uint64_t));
1237 }
1238 else
1239#endif
1240 write (evpipe [1], &old_errno, 1);
1241
1242 errno = old_errno;
1243 }
1244}
1245
1246/* called whenever the libev signal pipe */
1247/* got some events (signal, async) */
482static void 1248static void
483upheap (WT *heap, int k) 1249pipecb (EV_P_ ev_io *iow, int revents)
484{ 1250{
485 WT w = heap [k]; 1251 int i;
486 1252
487 while (k && heap [k >> 1]->at > w->at) 1253#if EV_USE_EVENTFD
488 { 1254 if (evfd >= 0)
489 heap [k] = heap [k >> 1];
490 ((W)heap [k])->active = k + 1;
491 k >>= 1;
492 } 1255 {
1256 uint64_t counter;
1257 read (evfd, &counter, sizeof (uint64_t));
1258 }
1259 else
1260#endif
1261 {
1262 char dummy;
1263 read (evpipe [0], &dummy, 1);
1264 }
493 1265
494 heap [k] = w; 1266 if (sig_pending)
495 ((W)heap [k])->active = k + 1; 1267 {
1268 sig_pending = 0;
496 1269
1270 for (i = EV_NSIG - 1; i--; )
1271 if (expect_false (signals [i].pending))
1272 ev_feed_signal_event (EV_A_ i + 1);
1273 }
1274
1275#if EV_ASYNC_ENABLE
1276 if (async_pending)
1277 {
1278 async_pending = 0;
1279
1280 for (i = asynccnt; i--; )
1281 if (asyncs [i]->sent)
1282 {
1283 asyncs [i]->sent = 0;
1284 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1285 }
1286 }
1287#endif
497} 1288}
1289
1290/*****************************************************************************/
498 1291
499static void 1292static void
500downheap (WT *heap, int N, int k)
501{
502 WT w = heap [k];
503
504 while (k < (N >> 1))
505 {
506 int j = k << 1;
507
508 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
509 ++j;
510
511 if (w->at <= heap [j]->at)
512 break;
513
514 heap [k] = heap [j];
515 ((W)heap [k])->active = k + 1;
516 k = j;
517 }
518
519 heap [k] = w;
520 ((W)heap [k])->active = k + 1;
521}
522
523/*****************************************************************************/
524
525typedef struct
526{
527 WL head;
528 sig_atomic_t volatile gotsig;
529} ANSIG;
530
531static ANSIG *signals;
532static int signalmax;
533
534static int sigpipe [2];
535static sig_atomic_t volatile gotsig;
536static struct ev_io sigev;
537
538static void
539signals_init (ANSIG *base, int count)
540{
541 while (count--)
542 {
543 base->head = 0;
544 base->gotsig = 0;
545
546 ++base;
547 }
548}
549
550static void
551sighandler (int signum) 1293ev_sighandler (int signum)
552{ 1294{
553#if WIN32 1295#if EV_MULTIPLICITY
554 signal (signum, sighandler); 1296 EV_P = signals [signum - 1].loop;
555#endif 1297#endif
556 1298
557 signals [signum - 1].gotsig = 1;
558
559 if (!gotsig)
560 {
561 int old_errno = errno;
562 gotsig = 1;
563#ifdef WIN32 1299#ifdef _WIN32
564 send (sigpipe [1], &signum, 1, MSG_DONTWAIT); 1300 signal (signum, ev_sighandler);
565#else
566 write (sigpipe [1], &signum, 1);
567#endif 1301#endif
568 errno = old_errno;
569 }
570}
571 1302
572void 1303 signals [signum - 1].pending = 1;
1304 evpipe_write (EV_A_ &sig_pending);
1305}
1306
1307void noinline
573ev_feed_signal_event (EV_P_ int signum) 1308ev_feed_signal_event (EV_P_ int signum)
574{ 1309{
575 WL w; 1310 WL w;
576 1311
1312 if (expect_false (signum <= 0 || signum > EV_NSIG))
1313 return;
1314
1315 --signum;
1316
577#if EV_MULTIPLICITY 1317#if EV_MULTIPLICITY
578 assert (("feeding signal events is only supported in the default loop", loop == default_loop)); 1318 /* it is permissible to try to feed a signal to the wrong loop */
579#endif 1319 /* or, likely more useful, feeding a signal nobody is waiting for */
580 1320
581 --signum; 1321 if (expect_false (signals [signum].loop != EV_A))
582
583 if (signum < 0 || signum >= signalmax)
584 return; 1322 return;
1323#endif
585 1324
586 signals [signum].gotsig = 0; 1325 signals [signum].pending = 0;
587 1326
588 for (w = signals [signum].head; w; w = w->next) 1327 for (w = signals [signum].head; w; w = w->next)
589 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 1328 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
590} 1329}
591 1330
1331#if EV_USE_SIGNALFD
592static void 1332static void
593sigcb (EV_P_ struct ev_io *iow, int revents) 1333sigfdcb (EV_P_ ev_io *iow, int revents)
594{ 1334{
595 int signum; 1335 struct signalfd_siginfo si[2], *sip; /* these structs are big */
596 1336
597#ifdef WIN32 1337 for (;;)
598 recv (sigpipe [0], &revents, 1, MSG_DONTWAIT); 1338 {
599#else 1339 ssize_t res = read (sigfd, si, sizeof (si));
600 read (sigpipe [0], &revents, 1);
601#endif
602 gotsig = 0;
603 1340
604 for (signum = signalmax; signum--; ) 1341 /* not ISO-C, as res might be -1, but works with SuS */
605 if (signals [signum].gotsig) 1342 for (sip = si; (char *)sip < (char *)si + res; ++sip)
606 ev_feed_signal_event (EV_A_ signum + 1); 1343 ev_feed_signal_event (EV_A_ sip->ssi_signo);
607}
608 1344
609static void 1345 if (res < (ssize_t)sizeof (si))
610siginit (EV_P) 1346 break;
611{ 1347 }
612#ifndef WIN32
613 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
614 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
615
616 /* rather than sort out wether we really need nb, set it */
617 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
618 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
619#endif
620
621 ev_io_set (&sigev, sigpipe [0], EV_READ);
622 ev_io_start (EV_A_ &sigev);
623 ev_unref (EV_A); /* child watcher should not keep loop alive */
624} 1348}
1349#endif
625 1350
626/*****************************************************************************/ 1351/*****************************************************************************/
627 1352
628static struct ev_child *childs [PID_HASHSIZE]; 1353static WL childs [EV_PID_HASHSIZE];
629 1354
630#ifndef WIN32 1355#ifndef _WIN32
631 1356
632static struct ev_signal childev; 1357static ev_signal childev;
1358
1359#ifndef WIFCONTINUED
1360# define WIFCONTINUED(status) 0
1361#endif
1362
1363/* handle a single child status event */
1364inline_speed void
1365child_reap (EV_P_ int chain, int pid, int status)
1366{
1367 ev_child *w;
1368 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1369
1370 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1371 {
1372 if ((w->pid == pid || !w->pid)
1373 && (!traced || (w->flags & 1)))
1374 {
1375 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1376 w->rpid = pid;
1377 w->rstatus = status;
1378 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1379 }
1380 }
1381}
633 1382
634#ifndef WCONTINUED 1383#ifndef WCONTINUED
635# define WCONTINUED 0 1384# define WCONTINUED 0
636#endif 1385#endif
637 1386
1387/* called on sigchld etc., calls waitpid */
638static void 1388static void
639child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
640{
641 struct ev_child *w;
642
643 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
644 if (w->pid == pid || !w->pid)
645 {
646 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
647 w->rpid = pid;
648 w->rstatus = status;
649 ev_feed_event (EV_A_ (W)w, EV_CHILD);
650 }
651}
652
653static void
654childcb (EV_P_ struct ev_signal *sw, int revents) 1389childcb (EV_P_ ev_signal *sw, int revents)
655{ 1390{
656 int pid, status; 1391 int pid, status;
657 1392
1393 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
658 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1394 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
659 { 1395 if (!WCONTINUED
1396 || errno != EINVAL
1397 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1398 return;
1399
660 /* make sure we are called again until all childs have been reaped */ 1400 /* make sure we are called again until all children have been reaped */
1401 /* we need to do it this way so that the callback gets called before we continue */
661 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1402 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
662 1403
663 child_reap (EV_A_ sw, pid, pid, status); 1404 child_reap (EV_A_ pid, pid, status);
1405 if (EV_PID_HASHSIZE > 1)
664 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1406 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
665 }
666} 1407}
667 1408
668#endif 1409#endif
669 1410
670/*****************************************************************************/ 1411/*****************************************************************************/
671 1412
1413#if EV_USE_PORT
1414# include "ev_port.c"
1415#endif
672#if EV_USE_KQUEUE 1416#if EV_USE_KQUEUE
673# include "ev_kqueue.c" 1417# include "ev_kqueue.c"
674#endif 1418#endif
675#if EV_USE_EPOLL 1419#if EV_USE_EPOLL
676# include "ev_epoll.c" 1420# include "ev_epoll.c"
… …
693{ 1437{
694 return EV_VERSION_MINOR; 1438 return EV_VERSION_MINOR;
695} 1439}
696 1440
697/* return true if we are running with elevated privileges and should ignore env variables */ 1441/* return true if we are running with elevated privileges and should ignore env variables */
698static int 1442int inline_size
699enable_secure (void) 1443enable_secure (void)
700{ 1444{
701#ifdef WIN32 1445#ifdef _WIN32
702 return 0; 1446 return 0;
703#else 1447#else
704 return getuid () != geteuid () 1448 return getuid () != geteuid ()
705 || getgid () != getegid (); 1449 || getgid () != getegid ();
706#endif 1450#endif
707} 1451}
708 1452
709int 1453unsigned int
710ev_method (EV_P) 1454ev_supported_backends (void)
711{ 1455{
712 return method; 1456 unsigned int flags = 0;
713}
714 1457
715static void 1458 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
716loop_init (EV_P_ int methods) 1459 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1460 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1461 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1462 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1463
1464 return flags;
1465}
1466
1467unsigned int
1468ev_recommended_backends (void)
717{ 1469{
718 if (!method) 1470 unsigned int flags = ev_supported_backends ();
1471
1472#ifndef __NetBSD__
1473 /* kqueue is borked on everything but netbsd apparently */
1474 /* it usually doesn't work correctly on anything but sockets and pipes */
1475 flags &= ~EVBACKEND_KQUEUE;
1476#endif
1477#ifdef __APPLE__
1478 /* only select works correctly on that "unix-certified" platform */
1479 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1480 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1481#endif
1482
1483 return flags;
1484}
1485
1486unsigned int
1487ev_embeddable_backends (void)
1488{
1489 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1490
1491 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1492 /* please fix it and tell me how to detect the fix */
1493 flags &= ~EVBACKEND_EPOLL;
1494
1495 return flags;
1496}
1497
1498unsigned int
1499ev_backend (EV_P)
1500{
1501 return backend;
1502}
1503
1504#if EV_MINIMAL < 2
1505unsigned int
1506ev_loop_count (EV_P)
1507{
1508 return loop_count;
1509}
1510
1511unsigned int
1512ev_loop_depth (EV_P)
1513{
1514 return loop_depth;
1515}
1516
1517void
1518ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1519{
1520 io_blocktime = interval;
1521}
1522
1523void
1524ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1525{
1526 timeout_blocktime = interval;
1527}
1528
1529void
1530ev_set_userdata (EV_P_ void *data)
1531{
1532 userdata = data;
1533}
1534
1535void *
1536ev_userdata (EV_P)
1537{
1538 return userdata;
1539}
1540
1541void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1542{
1543 invoke_cb = invoke_pending_cb;
1544}
1545
1546void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1547{
1548 release_cb = release;
1549 acquire_cb = acquire;
1550}
1551#endif
1552
1553/* initialise a loop structure, must be zero-initialised */
1554static void noinline
1555loop_init (EV_P_ unsigned int flags)
1556{
1557 if (!backend)
719 { 1558 {
1559#if EV_USE_REALTIME
1560 if (!have_realtime)
1561 {
1562 struct timespec ts;
1563
1564 if (!clock_gettime (CLOCK_REALTIME, &ts))
1565 have_realtime = 1;
1566 }
1567#endif
1568
720#if EV_USE_MONOTONIC 1569#if EV_USE_MONOTONIC
1570 if (!have_monotonic)
1571 {
1572 struct timespec ts;
1573
1574 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1575 have_monotonic = 1;
1576 }
1577#endif
1578
1579 /* pid check not overridable via env */
1580#ifndef _WIN32
1581 if (flags & EVFLAG_FORKCHECK)
1582 curpid = getpid ();
1583#endif
1584
1585 if (!(flags & EVFLAG_NOENV)
1586 && !enable_secure ()
1587 && getenv ("LIBEV_FLAGS"))
1588 flags = atoi (getenv ("LIBEV_FLAGS"));
1589
1590 ev_rt_now = ev_time ();
1591 mn_now = get_clock ();
1592 now_floor = mn_now;
1593 rtmn_diff = ev_rt_now - mn_now;
1594#if EV_MINIMAL < 2
1595 invoke_cb = ev_invoke_pending;
1596#endif
1597
1598 io_blocktime = 0.;
1599 timeout_blocktime = 0.;
1600 backend = 0;
1601 backend_fd = -1;
1602 sig_pending = 0;
1603#if EV_ASYNC_ENABLE
1604 async_pending = 0;
1605#endif
1606#if EV_USE_INOTIFY
1607 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1608#endif
1609#if EV_USE_SIGNALFD
1610 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1611#endif
1612
1613 if (!(flags & 0x0000ffffU))
1614 flags |= ev_recommended_backends ();
1615
1616#if EV_USE_PORT
1617 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1618#endif
1619#if EV_USE_KQUEUE
1620 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1621#endif
1622#if EV_USE_EPOLL
1623 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1624#endif
1625#if EV_USE_POLL
1626 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1627#endif
1628#if EV_USE_SELECT
1629 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1630#endif
1631
1632 ev_prepare_init (&pending_w, pendingcb);
1633
1634 ev_init (&pipe_w, pipecb);
1635 ev_set_priority (&pipe_w, EV_MAXPRI);
1636 }
1637}
1638
1639/* free up a loop structure */
1640static void noinline
1641loop_destroy (EV_P)
1642{
1643 int i;
1644
1645 if (ev_is_active (&pipe_w))
1646 {
1647 /*ev_ref (EV_A);*/
1648 /*ev_io_stop (EV_A_ &pipe_w);*/
1649
1650#if EV_USE_EVENTFD
1651 if (evfd >= 0)
1652 close (evfd);
1653#endif
1654
1655 if (evpipe [0] >= 0)
1656 {
1657 EV_WIN32_CLOSE_FD (evpipe [0]);
1658 EV_WIN32_CLOSE_FD (evpipe [1]);
1659 }
1660 }
1661
1662#if EV_USE_SIGNALFD
1663 if (ev_is_active (&sigfd_w))
1664 close (sigfd);
1665#endif
1666
1667#if EV_USE_INOTIFY
1668 if (fs_fd >= 0)
1669 close (fs_fd);
1670#endif
1671
1672 if (backend_fd >= 0)
1673 close (backend_fd);
1674
1675#if EV_USE_PORT
1676 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1677#endif
1678#if EV_USE_KQUEUE
1679 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1680#endif
1681#if EV_USE_EPOLL
1682 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1683#endif
1684#if EV_USE_POLL
1685 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1686#endif
1687#if EV_USE_SELECT
1688 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1689#endif
1690
1691 for (i = NUMPRI; i--; )
1692 {
1693 array_free (pending, [i]);
1694#if EV_IDLE_ENABLE
1695 array_free (idle, [i]);
1696#endif
1697 }
1698
1699 ev_free (anfds); anfds = 0; anfdmax = 0;
1700
1701 /* have to use the microsoft-never-gets-it-right macro */
1702 array_free (rfeed, EMPTY);
1703 array_free (fdchange, EMPTY);
1704 array_free (timer, EMPTY);
1705#if EV_PERIODIC_ENABLE
1706 array_free (periodic, EMPTY);
1707#endif
1708#if EV_FORK_ENABLE
1709 array_free (fork, EMPTY);
1710#endif
1711 array_free (prepare, EMPTY);
1712 array_free (check, EMPTY);
1713#if EV_ASYNC_ENABLE
1714 array_free (async, EMPTY);
1715#endif
1716
1717 backend = 0;
1718}
1719
1720#if EV_USE_INOTIFY
1721inline_size void infy_fork (EV_P);
1722#endif
1723
1724inline_size void
1725loop_fork (EV_P)
1726{
1727#if EV_USE_PORT
1728 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1729#endif
1730#if EV_USE_KQUEUE
1731 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1732#endif
1733#if EV_USE_EPOLL
1734 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1735#endif
1736#if EV_USE_INOTIFY
1737 infy_fork (EV_A);
1738#endif
1739
1740 if (ev_is_active (&pipe_w))
1741 {
1742 /* this "locks" the handlers against writing to the pipe */
1743 /* while we modify the fd vars */
1744 sig_pending = 1;
1745#if EV_ASYNC_ENABLE
1746 async_pending = 1;
1747#endif
1748
1749 ev_ref (EV_A);
1750 ev_io_stop (EV_A_ &pipe_w);
1751
1752#if EV_USE_EVENTFD
1753 if (evfd >= 0)
1754 close (evfd);
1755#endif
1756
1757 if (evpipe [0] >= 0)
1758 {
1759 EV_WIN32_CLOSE_FD (evpipe [0]);
1760 EV_WIN32_CLOSE_FD (evpipe [1]);
1761 }
1762
1763 evpipe_init (EV_A);
1764 /* now iterate over everything, in case we missed something */
1765 pipecb (EV_A_ &pipe_w, EV_READ);
1766 }
1767
1768 postfork = 0;
1769}
1770
1771#if EV_MULTIPLICITY
1772
1773struct ev_loop *
1774ev_loop_new (unsigned int flags)
1775{
1776 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1777
1778 memset (EV_A, 0, sizeof (struct ev_loop));
1779 loop_init (EV_A_ flags);
1780
1781 if (ev_backend (EV_A))
1782 return EV_A;
1783
1784 return 0;
1785}
1786
1787void
1788ev_loop_destroy (EV_P)
1789{
1790 loop_destroy (EV_A);
1791 ev_free (loop);
1792}
1793
1794void
1795ev_loop_fork (EV_P)
1796{
1797 postfork = 1; /* must be in line with ev_default_fork */
1798}
1799#endif /* multiplicity */
1800
1801#if EV_VERIFY
1802static void noinline
1803verify_watcher (EV_P_ W w)
1804{
1805 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1806
1807 if (w->pending)
1808 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1809}
1810
1811static void noinline
1812verify_heap (EV_P_ ANHE *heap, int N)
1813{
1814 int i;
1815
1816 for (i = HEAP0; i < N + HEAP0; ++i)
1817 {
1818 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1819 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1820 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1821
1822 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1823 }
1824}
1825
1826static void noinline
1827array_verify (EV_P_ W *ws, int cnt)
1828{
1829 while (cnt--)
1830 {
1831 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1832 verify_watcher (EV_A_ ws [cnt]);
1833 }
1834}
1835#endif
1836
1837#if EV_MINIMAL < 2
1838void
1839ev_loop_verify (EV_P)
1840{
1841#if EV_VERIFY
1842 int i;
1843 WL w;
1844
1845 assert (activecnt >= -1);
1846
1847 assert (fdchangemax >= fdchangecnt);
1848 for (i = 0; i < fdchangecnt; ++i)
1849 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1850
1851 assert (anfdmax >= 0);
1852 for (i = 0; i < anfdmax; ++i)
1853 for (w = anfds [i].head; w; w = w->next)
721 { 1854 {
722 struct timespec ts; 1855 verify_watcher (EV_A_ (W)w);
723 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1856 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
724 have_monotonic = 1; 1857 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
725 } 1858 }
726#endif
727 1859
728 rt_now = ev_time (); 1860 assert (timermax >= timercnt);
729 mn_now = get_clock (); 1861 verify_heap (EV_A_ timers, timercnt);
730 now_floor = mn_now;
731 rtmn_diff = rt_now - mn_now;
732 1862
733 if (methods == EVMETHOD_AUTO) 1863#if EV_PERIODIC_ENABLE
734 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1864 assert (periodicmax >= periodiccnt);
735 methods = atoi (getenv ("LIBEV_METHODS")); 1865 verify_heap (EV_A_ periodics, periodiccnt);
736 else
737 methods = EVMETHOD_ANY;
738
739 method = 0;
740#if EV_USE_WIN32
741 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
742#endif
743#if EV_USE_KQUEUE
744 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
745#endif
746#if EV_USE_EPOLL
747 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
748#endif
749#if EV_USE_POLL
750 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
751#endif
752#if EV_USE_SELECT
753 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
754#endif
755
756 ev_watcher_init (&sigev, sigcb);
757 ev_set_priority (&sigev, EV_MAXPRI);
758 }
759}
760
761void
762loop_destroy (EV_P)
763{
764 int i;
765
766#if EV_USE_WIN32
767 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
768#endif
769#if EV_USE_KQUEUE
770 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
771#endif
772#if EV_USE_EPOLL
773 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
774#endif
775#if EV_USE_POLL
776 if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
777#endif
778#if EV_USE_SELECT
779 if (method == EVMETHOD_SELECT) select_destroy (EV_A);
780#endif 1866#endif
781 1867
782 for (i = NUMPRI; i--; ) 1868 for (i = NUMPRI; i--; )
783 array_free (pending, [i]); 1869 {
1870 assert (pendingmax [i] >= pendingcnt [i]);
1871#if EV_IDLE_ENABLE
1872 assert (idleall >= 0);
1873 assert (idlemax [i] >= idlecnt [i]);
1874 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1875#endif
1876 }
784 1877
785 /* have to use the microsoft-never-gets-it-right macro */ 1878#if EV_FORK_ENABLE
786 array_free_microshit (fdchange); 1879 assert (forkmax >= forkcnt);
787 array_free_microshit (timer); 1880 array_verify (EV_A_ (W *)forks, forkcnt);
788 array_free_microshit (periodic); 1881#endif
789 array_free_microshit (idle);
790 array_free_microshit (prepare);
791 array_free_microshit (check);
792 1882
793 method = 0; 1883#if EV_ASYNC_ENABLE
794} 1884 assert (asyncmax >= asynccnt);
1885 array_verify (EV_A_ (W *)asyncs, asynccnt);
1886#endif
795 1887
796static void 1888 assert (preparemax >= preparecnt);
797loop_fork (EV_P) 1889 array_verify (EV_A_ (W *)prepares, preparecnt);
798{ 1890
799#if EV_USE_EPOLL 1891 assert (checkmax >= checkcnt);
800 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1892 array_verify (EV_A_ (W *)checks, checkcnt);
1893
1894# if 0
1895 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1896 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
801#endif 1897# endif
802#if EV_USE_KQUEUE
803 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
804#endif 1898#endif
805
806 if (ev_is_active (&sigev))
807 {
808 /* default loop */
809
810 ev_ref (EV_A);
811 ev_io_stop (EV_A_ &sigev);
812 close (sigpipe [0]);
813 close (sigpipe [1]);
814
815 while (pipe (sigpipe))
816 syserr ("(libev) error creating pipe");
817
818 siginit (EV_A);
819 }
820
821 postfork = 0;
822} 1899}
1900#endif
823 1901
824#if EV_MULTIPLICITY 1902#if EV_MULTIPLICITY
825struct ev_loop * 1903struct ev_loop *
826ev_loop_new (int methods) 1904ev_default_loop_init (unsigned int flags)
827{
828 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
829
830 memset (loop, 0, sizeof (struct ev_loop));
831
832 loop_init (EV_A_ methods);
833
834 if (ev_method (EV_A))
835 return loop;
836
837 return 0;
838}
839
840void
841ev_loop_destroy (EV_P)
842{
843 loop_destroy (EV_A);
844 ev_free (loop);
845}
846
847void
848ev_loop_fork (EV_P)
849{
850 postfork = 1;
851}
852
853#endif
854
855#if EV_MULTIPLICITY
856struct ev_loop *
857#else 1905#else
858int 1906int
1907ev_default_loop (unsigned int flags)
859#endif 1908#endif
860ev_default_loop (int methods)
861{ 1909{
862 if (sigpipe [0] == sigpipe [1])
863 if (pipe (sigpipe))
864 return 0;
865
866 if (!default_loop) 1910 if (!ev_default_loop_ptr)
867 { 1911 {
868#if EV_MULTIPLICITY 1912#if EV_MULTIPLICITY
869 struct ev_loop *loop = default_loop = &default_loop_struct; 1913 EV_P = ev_default_loop_ptr = &default_loop_struct;
870#else 1914#else
871 default_loop = 1; 1915 ev_default_loop_ptr = 1;
872#endif 1916#endif
873 1917
874 loop_init (EV_A_ methods); 1918 loop_init (EV_A_ flags);
875 1919
876 if (ev_method (EV_A)) 1920 if (ev_backend (EV_A))
877 { 1921 {
878 siginit (EV_A);
879
880#ifndef WIN32 1922#ifndef _WIN32
881 ev_signal_init (&childev, childcb, SIGCHLD); 1923 ev_signal_init (&childev, childcb, SIGCHLD);
882 ev_set_priority (&childev, EV_MAXPRI); 1924 ev_set_priority (&childev, EV_MAXPRI);
883 ev_signal_start (EV_A_ &childev); 1925 ev_signal_start (EV_A_ &childev);
884 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1926 ev_unref (EV_A); /* child watcher should not keep loop alive */
885#endif 1927#endif
886 } 1928 }
887 else 1929 else
888 default_loop = 0; 1930 ev_default_loop_ptr = 0;
889 } 1931 }
890 1932
891 return default_loop; 1933 return ev_default_loop_ptr;
892} 1934}
893 1935
894void 1936void
895ev_default_destroy (void) 1937ev_default_destroy (void)
896{ 1938{
897#if EV_MULTIPLICITY 1939#if EV_MULTIPLICITY
898 struct ev_loop *loop = default_loop; 1940 EV_P = ev_default_loop_ptr;
899#endif 1941#endif
900 1942
1943 ev_default_loop_ptr = 0;
1944
901#ifndef WIN32 1945#ifndef _WIN32
902 ev_ref (EV_A); /* child watcher */ 1946 ev_ref (EV_A); /* child watcher */
903 ev_signal_stop (EV_A_ &childev); 1947 ev_signal_stop (EV_A_ &childev);
904#endif 1948#endif
905 1949
906 ev_ref (EV_A); /* signal watcher */
907 ev_io_stop (EV_A_ &sigev);
908
909 close (sigpipe [0]); sigpipe [0] = 0;
910 close (sigpipe [1]); sigpipe [1] = 0;
911
912 loop_destroy (EV_A); 1950 loop_destroy (EV_A);
913} 1951}
914 1952
915void 1953void
916ev_default_fork (void) 1954ev_default_fork (void)
917{ 1955{
918#if EV_MULTIPLICITY 1956#if EV_MULTIPLICITY
919 struct ev_loop *loop = default_loop; 1957 EV_P = ev_default_loop_ptr;
920#endif 1958#endif
921 1959
922 if (method) 1960 postfork = 1; /* must be in line with ev_loop_fork */
923 postfork = 1;
924} 1961}
925 1962
926/*****************************************************************************/ 1963/*****************************************************************************/
927 1964
928static int 1965void
929any_pending (EV_P) 1966ev_invoke (EV_P_ void *w, int revents)
1967{
1968 EV_CB_INVOKE ((W)w, revents);
1969}
1970
1971unsigned int
1972ev_pending_count (EV_P)
930{ 1973{
931 int pri; 1974 int pri;
1975 unsigned int count = 0;
932 1976
933 for (pri = NUMPRI; pri--; ) 1977 for (pri = NUMPRI; pri--; )
934 if (pendingcnt [pri]) 1978 count += pendingcnt [pri];
935 return 1;
936 1979
937 return 0; 1980 return count;
938} 1981}
939 1982
940static void 1983void noinline
941call_pending (EV_P) 1984ev_invoke_pending (EV_P)
942{ 1985{
943 int pri; 1986 int pri;
944 1987
945 for (pri = NUMPRI; pri--; ) 1988 for (pri = NUMPRI; pri--; )
946 while (pendingcnt [pri]) 1989 while (pendingcnt [pri])
947 { 1990 {
948 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1991 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
949 1992
950 if (p->w) 1993 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
951 { 1994 /* ^ this is no longer true, as pending_w could be here */
1995
952 p->w->pending = 0; 1996 p->w->pending = 0;
953 EV_CB_INVOKE (p->w, p->events); 1997 EV_CB_INVOKE (p->w, p->events);
954 } 1998 EV_FREQUENT_CHECK;
955 } 1999 }
956} 2000}
957 2001
958static void 2002#if EV_IDLE_ENABLE
2003/* make idle watchers pending. this handles the "call-idle */
2004/* only when higher priorities are idle" logic */
2005inline_size void
2006idle_reify (EV_P)
2007{
2008 if (expect_false (idleall))
2009 {
2010 int pri;
2011
2012 for (pri = NUMPRI; pri--; )
2013 {
2014 if (pendingcnt [pri])
2015 break;
2016
2017 if (idlecnt [pri])
2018 {
2019 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2020 break;
2021 }
2022 }
2023 }
2024}
2025#endif
2026
2027/* make timers pending */
2028inline_size void
959timers_reify (EV_P) 2029timers_reify (EV_P)
960{ 2030{
2031 EV_FREQUENT_CHECK;
2032
961 while (timercnt && ((WT)timers [0])->at <= mn_now) 2033 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
962 { 2034 {
963 struct ev_timer *w = timers [0]; 2035 do
964
965 assert (("inactive timer on timer heap detected", ev_is_active (w)));
966
967 /* first reschedule or stop timer */
968 if (w->repeat)
969 { 2036 {
2037 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2038
2039 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2040
2041 /* first reschedule or stop timer */
2042 if (w->repeat)
2043 {
2044 ev_at (w) += w->repeat;
2045 if (ev_at (w) < mn_now)
2046 ev_at (w) = mn_now;
2047
970 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2048 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
971 ((WT)w)->at = mn_now + w->repeat; 2049
2050 ANHE_at_cache (timers [HEAP0]);
972 downheap ((WT *)timers, timercnt, 0); 2051 downheap (timers, timercnt, HEAP0);
2052 }
2053 else
2054 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2055
2056 EV_FREQUENT_CHECK;
2057 feed_reverse (EV_A_ (W)w);
973 } 2058 }
974 else 2059 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
975 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
976 2060
977 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2061 feed_reverse_done (EV_A_ EV_TIMEOUT);
978 } 2062 }
979} 2063}
980 2064
981static void 2065#if EV_PERIODIC_ENABLE
2066/* make periodics pending */
2067inline_size void
982periodics_reify (EV_P) 2068periodics_reify (EV_P)
983{ 2069{
2070 EV_FREQUENT_CHECK;
2071
984 while (periodiccnt && ((WT)periodics [0])->at <= rt_now) 2072 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
985 { 2073 {
986 struct ev_periodic *w = periodics [0]; 2074 int feed_count = 0;
987 2075
2076 do
2077 {
2078 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2079
988 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 2080 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
989 2081
990 /* first reschedule or stop timer */ 2082 /* first reschedule or stop timer */
2083 if (w->reschedule_cb)
2084 {
2085 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2086
2087 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2088
2089 ANHE_at_cache (periodics [HEAP0]);
2090 downheap (periodics, periodiccnt, HEAP0);
2091 }
2092 else if (w->interval)
2093 {
2094 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2095 /* if next trigger time is not sufficiently in the future, put it there */
2096 /* this might happen because of floating point inexactness */
2097 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2098 {
2099 ev_at (w) += w->interval;
2100
2101 /* if interval is unreasonably low we might still have a time in the past */
2102 /* so correct this. this will make the periodic very inexact, but the user */
2103 /* has effectively asked to get triggered more often than possible */
2104 if (ev_at (w) < ev_rt_now)
2105 ev_at (w) = ev_rt_now;
2106 }
2107
2108 ANHE_at_cache (periodics [HEAP0]);
2109 downheap (periodics, periodiccnt, HEAP0);
2110 }
2111 else
2112 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2113
2114 EV_FREQUENT_CHECK;
2115 feed_reverse (EV_A_ (W)w);
2116 }
2117 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2118
2119 feed_reverse_done (EV_A_ EV_PERIODIC);
2120 }
2121}
2122
2123/* simply recalculate all periodics */
2124/* TODO: maybe ensure that at leats one event happens when jumping forward? */
2125static void noinline
2126periodics_reschedule (EV_P)
2127{
2128 int i;
2129
2130 /* adjust periodics after time jump */
2131 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2132 {
2133 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2134
991 if (w->reschedule_cb) 2135 if (w->reschedule_cb)
992 {
993 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001); 2136 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
994
995 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
996 downheap ((WT *)periodics, periodiccnt, 0);
997 }
998 else if (w->interval) 2137 else if (w->interval)
999 { 2138 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1000 ((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1001 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
1002 downheap ((WT *)periodics, periodiccnt, 0);
1003 }
1004 else
1005 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1006 2139
1007 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 2140 ANHE_at_cache (periodics [i]);
1008 } 2141 }
1009}
1010 2142
1011static void 2143 reheap (periodics, periodiccnt);
1012periodics_reschedule (EV_P) 2144}
2145#endif
2146
2147/* adjust all timers by a given offset */
2148static void noinline
2149timers_reschedule (EV_P_ ev_tstamp adjust)
1013{ 2150{
1014 int i; 2151 int i;
1015 2152
1016 /* adjust periodics after time jump */
1017 for (i = 0; i < periodiccnt; ++i) 2153 for (i = 0; i < timercnt; ++i)
1018 {
1019 struct ev_periodic *w = periodics [i];
1020
1021 if (w->reschedule_cb)
1022 ((WT)w)->at = w->reschedule_cb (w, rt_now);
1023 else if (w->interval)
1024 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
1025 } 2154 {
1026 2155 ANHE *he = timers + i + HEAP0;
1027 /* now rebuild the heap */ 2156 ANHE_w (*he)->at += adjust;
1028 for (i = periodiccnt >> 1; i--; ) 2157 ANHE_at_cache (*he);
1029 downheap ((WT *)periodics, periodiccnt, i);
1030}
1031
1032inline int
1033time_update_monotonic (EV_P)
1034{
1035 mn_now = get_clock ();
1036
1037 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1038 { 2158 }
1039 rt_now = rtmn_diff + mn_now;
1040 return 0;
1041 }
1042 else
1043 {
1044 now_floor = mn_now;
1045 rt_now = ev_time ();
1046 return 1;
1047 }
1048} 2159}
1049 2160
1050static void 2161/* fetch new monotonic and realtime times from the kernel */
1051time_update (EV_P) 2162/* also detect if there was a timejump, and act accordingly */
2163inline_speed void
2164time_update (EV_P_ ev_tstamp max_block)
1052{ 2165{
1053 int i;
1054
1055#if EV_USE_MONOTONIC 2166#if EV_USE_MONOTONIC
1056 if (expect_true (have_monotonic)) 2167 if (expect_true (have_monotonic))
1057 { 2168 {
1058 if (time_update_monotonic (EV_A)) 2169 int i;
2170 ev_tstamp odiff = rtmn_diff;
2171
2172 mn_now = get_clock ();
2173
2174 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2175 /* interpolate in the meantime */
2176 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1059 { 2177 {
1060 ev_tstamp odiff = rtmn_diff; 2178 ev_rt_now = rtmn_diff + mn_now;
2179 return;
2180 }
1061 2181
2182 now_floor = mn_now;
2183 ev_rt_now = ev_time ();
2184
1062 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 2185 /* loop a few times, before making important decisions.
2186 * on the choice of "4": one iteration isn't enough,
2187 * in case we get preempted during the calls to
2188 * ev_time and get_clock. a second call is almost guaranteed
2189 * to succeed in that case, though. and looping a few more times
2190 * doesn't hurt either as we only do this on time-jumps or
2191 * in the unlikely event of having been preempted here.
2192 */
2193 for (i = 4; --i; )
1063 { 2194 {
1064 rtmn_diff = rt_now - mn_now; 2195 rtmn_diff = ev_rt_now - mn_now;
1065 2196
1066 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2197 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1067 return; /* all is well */ 2198 return; /* all is well */
1068 2199
1069 rt_now = ev_time (); 2200 ev_rt_now = ev_time ();
1070 mn_now = get_clock (); 2201 mn_now = get_clock ();
1071 now_floor = mn_now; 2202 now_floor = mn_now;
1072 } 2203 }
1073 2204
2205 /* no timer adjustment, as the monotonic clock doesn't jump */
2206 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2207# if EV_PERIODIC_ENABLE
2208 periodics_reschedule (EV_A);
2209# endif
2210 }
2211 else
2212#endif
2213 {
2214 ev_rt_now = ev_time ();
2215
2216 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2217 {
2218 /* adjust timers. this is easy, as the offset is the same for all of them */
2219 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2220#if EV_PERIODIC_ENABLE
1074 periodics_reschedule (EV_A); 2221 periodics_reschedule (EV_A);
1075 /* no timer adjustment, as the monotonic clock doesn't jump */ 2222#endif
1076 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1077 } 2223 }
1078 }
1079 else
1080#endif
1081 {
1082 rt_now = ev_time ();
1083 2224
1084 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1085 {
1086 periodics_reschedule (EV_A);
1087
1088 /* adjust timers. this is easy, as the offset is the same for all */
1089 for (i = 0; i < timercnt; ++i)
1090 ((WT)timers [i])->at += rt_now - mn_now;
1091 }
1092
1093 mn_now = rt_now; 2225 mn_now = ev_rt_now;
1094 } 2226 }
1095} 2227}
1096
1097void
1098ev_ref (EV_P)
1099{
1100 ++activecnt;
1101}
1102
1103void
1104ev_unref (EV_P)
1105{
1106 --activecnt;
1107}
1108
1109static int loop_done;
1110 2228
1111void 2229void
1112ev_loop (EV_P_ int flags) 2230ev_loop (EV_P_ int flags)
1113{ 2231{
1114 double block; 2232#if EV_MINIMAL < 2
1115 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 2233 ++loop_depth;
2234#endif
2235
2236 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2237
2238 loop_done = EVUNLOOP_CANCEL;
2239
2240 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1116 2241
1117 do 2242 do
1118 { 2243 {
2244#if EV_VERIFY >= 2
2245 ev_loop_verify (EV_A);
2246#endif
2247
2248#ifndef _WIN32
2249 if (expect_false (curpid)) /* penalise the forking check even more */
2250 if (expect_false (getpid () != curpid))
2251 {
2252 curpid = getpid ();
2253 postfork = 1;
2254 }
2255#endif
2256
2257#if EV_FORK_ENABLE
2258 /* we might have forked, so queue fork handlers */
2259 if (expect_false (postfork))
2260 if (forkcnt)
2261 {
2262 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2263 EV_INVOKE_PENDING;
2264 }
2265#endif
2266
1119 /* queue check watchers (and execute them) */ 2267 /* queue prepare watchers (and execute them) */
1120 if (expect_false (preparecnt)) 2268 if (expect_false (preparecnt))
1121 { 2269 {
1122 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2270 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1123 call_pending (EV_A); 2271 EV_INVOKE_PENDING;
1124 } 2272 }
2273
2274 if (expect_false (loop_done))
2275 break;
1125 2276
1126 /* we might have forked, so reify kernel state if necessary */ 2277 /* we might have forked, so reify kernel state if necessary */
1127 if (expect_false (postfork)) 2278 if (expect_false (postfork))
1128 loop_fork (EV_A); 2279 loop_fork (EV_A);
1129 2280
1130 /* update fd-related kernel structures */ 2281 /* update fd-related kernel structures */
1131 fd_reify (EV_A); 2282 fd_reify (EV_A);
1132 2283
1133 /* calculate blocking time */ 2284 /* calculate blocking time */
2285 {
2286 ev_tstamp waittime = 0.;
2287 ev_tstamp sleeptime = 0.;
1134 2288
1135 /* we only need this for !monotonic clock or timers, but as we basically 2289 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1136 always have timers, we just calculate it always */
1137#if EV_USE_MONOTONIC
1138 if (expect_true (have_monotonic))
1139 time_update_monotonic (EV_A);
1140 else
1141#endif
1142 { 2290 {
1143 rt_now = ev_time (); 2291 /* remember old timestamp for io_blocktime calculation */
1144 mn_now = rt_now; 2292 ev_tstamp prev_mn_now = mn_now;
1145 }
1146 2293
1147 if (flags & EVLOOP_NONBLOCK || idlecnt) 2294 /* update time to cancel out callback processing overhead */
1148 block = 0.; 2295 time_update (EV_A_ 1e100);
1149 else 2296
1150 {
1151 block = MAX_BLOCKTIME; 2297 waittime = MAX_BLOCKTIME;
1152 2298
1153 if (timercnt) 2299 if (timercnt)
1154 { 2300 {
1155 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 2301 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1156 if (block > to) block = to; 2302 if (waittime > to) waittime = to;
1157 } 2303 }
1158 2304
2305#if EV_PERIODIC_ENABLE
1159 if (periodiccnt) 2306 if (periodiccnt)
1160 { 2307 {
1161 ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge; 2308 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1162 if (block > to) block = to; 2309 if (waittime > to) waittime = to;
1163 } 2310 }
2311#endif
1164 2312
1165 if (block < 0.) block = 0.; 2313 /* don't let timeouts decrease the waittime below timeout_blocktime */
2314 if (expect_false (waittime < timeout_blocktime))
2315 waittime = timeout_blocktime;
2316
2317 /* extra check because io_blocktime is commonly 0 */
2318 if (expect_false (io_blocktime))
2319 {
2320 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2321
2322 if (sleeptime > waittime - backend_fudge)
2323 sleeptime = waittime - backend_fudge;
2324
2325 if (expect_true (sleeptime > 0.))
2326 {
2327 ev_sleep (sleeptime);
2328 waittime -= sleeptime;
2329 }
2330 }
1166 } 2331 }
1167 2332
1168 method_poll (EV_A_ block); 2333#if EV_MINIMAL < 2
2334 ++loop_count;
2335#endif
2336 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2337 backend_poll (EV_A_ waittime);
2338 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
1169 2339
1170 /* update rt_now, do magic */ 2340 /* update ev_rt_now, do magic */
1171 time_update (EV_A); 2341 time_update (EV_A_ waittime + sleeptime);
2342 }
1172 2343
1173 /* queue pending timers and reschedule them */ 2344 /* queue pending timers and reschedule them */
1174 timers_reify (EV_A); /* relative timers called last */ 2345 timers_reify (EV_A); /* relative timers called last */
2346#if EV_PERIODIC_ENABLE
1175 periodics_reify (EV_A); /* absolute timers called first */ 2347 periodics_reify (EV_A); /* absolute timers called first */
2348#endif
1176 2349
2350#if EV_IDLE_ENABLE
1177 /* queue idle watchers unless io or timers are pending */ 2351 /* queue idle watchers unless other events are pending */
1178 if (idlecnt && !any_pending (EV_A)) 2352 idle_reify (EV_A);
1179 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2353#endif
1180 2354
1181 /* queue check watchers, to be executed first */ 2355 /* queue check watchers, to be executed first */
1182 if (checkcnt) 2356 if (expect_false (checkcnt))
1183 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2357 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1184 2358
1185 call_pending (EV_A); 2359 EV_INVOKE_PENDING;
1186 } 2360 }
1187 while (activecnt && !loop_done); 2361 while (expect_true (
2362 activecnt
2363 && !loop_done
2364 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2365 ));
1188 2366
1189 if (loop_done != 2) 2367 if (loop_done == EVUNLOOP_ONE)
1190 loop_done = 0; 2368 loop_done = EVUNLOOP_CANCEL;
2369
2370#if EV_MINIMAL < 2
2371 --loop_depth;
2372#endif
1191} 2373}
1192 2374
1193void 2375void
1194ev_unloop (EV_P_ int how) 2376ev_unloop (EV_P_ int how)
1195{ 2377{
1196 loop_done = how; 2378 loop_done = how;
1197} 2379}
1198 2380
2381void
2382ev_ref (EV_P)
2383{
2384 ++activecnt;
2385}
2386
2387void
2388ev_unref (EV_P)
2389{
2390 --activecnt;
2391}
2392
2393void
2394ev_now_update (EV_P)
2395{
2396 time_update (EV_A_ 1e100);
2397}
2398
2399void
2400ev_suspend (EV_P)
2401{
2402 ev_now_update (EV_A);
2403}
2404
2405void
2406ev_resume (EV_P)
2407{
2408 ev_tstamp mn_prev = mn_now;
2409
2410 ev_now_update (EV_A);
2411 timers_reschedule (EV_A_ mn_now - mn_prev);
2412#if EV_PERIODIC_ENABLE
2413 /* TODO: really do this? */
2414 periodics_reschedule (EV_A);
2415#endif
2416}
2417
1199/*****************************************************************************/ 2418/*****************************************************************************/
2419/* singly-linked list management, used when the expected list length is short */
1200 2420
1201inline void 2421inline_size void
1202wlist_add (WL *head, WL elem) 2422wlist_add (WL *head, WL elem)
1203{ 2423{
1204 elem->next = *head; 2424 elem->next = *head;
1205 *head = elem; 2425 *head = elem;
1206} 2426}
1207 2427
1208inline void 2428inline_size void
1209wlist_del (WL *head, WL elem) 2429wlist_del (WL *head, WL elem)
1210{ 2430{
1211 while (*head) 2431 while (*head)
1212 { 2432 {
1213 if (*head == elem) 2433 if (expect_true (*head == elem))
1214 { 2434 {
1215 *head = elem->next; 2435 *head = elem->next;
1216 return; 2436 break;
1217 } 2437 }
1218 2438
1219 head = &(*head)->next; 2439 head = &(*head)->next;
1220 } 2440 }
1221} 2441}
1222 2442
2443/* internal, faster, version of ev_clear_pending */
1223inline void 2444inline_speed void
1224ev_clear_pending (EV_P_ W w) 2445clear_pending (EV_P_ W w)
1225{ 2446{
1226 if (w->pending) 2447 if (w->pending)
1227 { 2448 {
1228 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2449 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1229 w->pending = 0; 2450 w->pending = 0;
1230 } 2451 }
1231} 2452}
1232 2453
2454int
2455ev_clear_pending (EV_P_ void *w)
2456{
2457 W w_ = (W)w;
2458 int pending = w_->pending;
2459
2460 if (expect_true (pending))
2461 {
2462 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2463 p->w = (W)&pending_w;
2464 w_->pending = 0;
2465 return p->events;
2466 }
2467 else
2468 return 0;
2469}
2470
1233inline void 2471inline_size void
2472pri_adjust (EV_P_ W w)
2473{
2474 int pri = ev_priority (w);
2475 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2476 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2477 ev_set_priority (w, pri);
2478}
2479
2480inline_speed void
1234ev_start (EV_P_ W w, int active) 2481ev_start (EV_P_ W w, int active)
1235{ 2482{
1236 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2483 pri_adjust (EV_A_ w);
1237 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1238
1239 w->active = active; 2484 w->active = active;
1240 ev_ref (EV_A); 2485 ev_ref (EV_A);
1241} 2486}
1242 2487
1243inline void 2488inline_size void
1244ev_stop (EV_P_ W w) 2489ev_stop (EV_P_ W w)
1245{ 2490{
1246 ev_unref (EV_A); 2491 ev_unref (EV_A);
1247 w->active = 0; 2492 w->active = 0;
1248} 2493}
1249 2494
1250/*****************************************************************************/ 2495/*****************************************************************************/
1251 2496
1252void 2497void noinline
1253ev_io_start (EV_P_ struct ev_io *w) 2498ev_io_start (EV_P_ ev_io *w)
1254{ 2499{
1255 int fd = w->fd; 2500 int fd = w->fd;
1256 2501
1257 if (ev_is_active (w)) 2502 if (expect_false (ev_is_active (w)))
1258 return; 2503 return;
1259 2504
1260 assert (("ev_io_start called with negative fd", fd >= 0)); 2505 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2506 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2507
2508 EV_FREQUENT_CHECK;
1261 2509
1262 ev_start (EV_A_ (W)w, 1); 2510 ev_start (EV_A_ (W)w, 1);
1263 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2511 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1264 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2512 wlist_add (&anfds[fd].head, (WL)w);
1265 2513
1266 fd_change (EV_A_ fd); 2514 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1267} 2515 w->events &= ~EV__IOFDSET;
1268 2516
1269void 2517 EV_FREQUENT_CHECK;
2518}
2519
2520void noinline
1270ev_io_stop (EV_P_ struct ev_io *w) 2521ev_io_stop (EV_P_ ev_io *w)
1271{ 2522{
1272 ev_clear_pending (EV_A_ (W)w); 2523 clear_pending (EV_A_ (W)w);
1273 if (!ev_is_active (w)) 2524 if (expect_false (!ev_is_active (w)))
1274 return; 2525 return;
1275 2526
2527 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2528
2529 EV_FREQUENT_CHECK;
2530
1276 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2531 wlist_del (&anfds[w->fd].head, (WL)w);
1277 ev_stop (EV_A_ (W)w); 2532 ev_stop (EV_A_ (W)w);
1278 2533
1279 fd_change (EV_A_ w->fd); 2534 fd_change (EV_A_ w->fd, 1);
1280}
1281 2535
1282void 2536 EV_FREQUENT_CHECK;
2537}
2538
2539void noinline
1283ev_timer_start (EV_P_ struct ev_timer *w) 2540ev_timer_start (EV_P_ ev_timer *w)
1284{ 2541{
1285 if (ev_is_active (w)) 2542 if (expect_false (ev_is_active (w)))
1286 return; 2543 return;
1287 2544
1288 ((WT)w)->at += mn_now; 2545 ev_at (w) += mn_now;
1289 2546
1290 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2547 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1291 2548
2549 EV_FREQUENT_CHECK;
2550
2551 ++timercnt;
1292 ev_start (EV_A_ (W)w, ++timercnt); 2552 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1293 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void)); 2553 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1294 timers [timercnt - 1] = w; 2554 ANHE_w (timers [ev_active (w)]) = (WT)w;
1295 upheap ((WT *)timers, timercnt - 1); 2555 ANHE_at_cache (timers [ev_active (w)]);
2556 upheap (timers, ev_active (w));
1296 2557
2558 EV_FREQUENT_CHECK;
2559
1297 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2560 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1298} 2561}
1299 2562
1300void 2563void noinline
1301ev_timer_stop (EV_P_ struct ev_timer *w) 2564ev_timer_stop (EV_P_ ev_timer *w)
1302{ 2565{
1303 ev_clear_pending (EV_A_ (W)w); 2566 clear_pending (EV_A_ (W)w);
1304 if (!ev_is_active (w)) 2567 if (expect_false (!ev_is_active (w)))
1305 return; 2568 return;
1306 2569
2570 EV_FREQUENT_CHECK;
2571
2572 {
2573 int active = ev_active (w);
2574
1307 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2575 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1308 2576
1309 if (((W)w)->active < timercnt--) 2577 --timercnt;
2578
2579 if (expect_true (active < timercnt + HEAP0))
1310 { 2580 {
1311 timers [((W)w)->active - 1] = timers [timercnt]; 2581 timers [active] = timers [timercnt + HEAP0];
1312 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2582 adjustheap (timers, timercnt, active);
1313 } 2583 }
2584 }
1314 2585
1315 ((WT)w)->at = w->repeat; 2586 EV_FREQUENT_CHECK;
2587
2588 ev_at (w) -= mn_now;
1316 2589
1317 ev_stop (EV_A_ (W)w); 2590 ev_stop (EV_A_ (W)w);
1318} 2591}
1319 2592
1320void 2593void noinline
1321ev_timer_again (EV_P_ struct ev_timer *w) 2594ev_timer_again (EV_P_ ev_timer *w)
1322{ 2595{
2596 EV_FREQUENT_CHECK;
2597
1323 if (ev_is_active (w)) 2598 if (ev_is_active (w))
1324 { 2599 {
1325 if (w->repeat) 2600 if (w->repeat)
1326 { 2601 {
1327 ((WT)w)->at = mn_now + w->repeat; 2602 ev_at (w) = mn_now + w->repeat;
1328 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2603 ANHE_at_cache (timers [ev_active (w)]);
2604 adjustheap (timers, timercnt, ev_active (w));
1329 } 2605 }
1330 else 2606 else
1331 ev_timer_stop (EV_A_ w); 2607 ev_timer_stop (EV_A_ w);
1332 } 2608 }
1333 else if (w->repeat) 2609 else if (w->repeat)
2610 {
2611 ev_at (w) = w->repeat;
1334 ev_timer_start (EV_A_ w); 2612 ev_timer_start (EV_A_ w);
1335} 2613 }
1336 2614
1337void 2615 EV_FREQUENT_CHECK;
2616}
2617
2618ev_tstamp
2619ev_timer_remaining (EV_P_ ev_timer *w)
2620{
2621 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2622}
2623
2624#if EV_PERIODIC_ENABLE
2625void noinline
1338ev_periodic_start (EV_P_ struct ev_periodic *w) 2626ev_periodic_start (EV_P_ ev_periodic *w)
1339{ 2627{
1340 if (ev_is_active (w)) 2628 if (expect_false (ev_is_active (w)))
1341 return; 2629 return;
1342 2630
1343 if (w->reschedule_cb) 2631 if (w->reschedule_cb)
1344 ((WT)w)->at = w->reschedule_cb (w, rt_now); 2632 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1345 else if (w->interval) 2633 else if (w->interval)
1346 { 2634 {
1347 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2635 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1348 /* this formula differs from the one in periodic_reify because we do not always round up */ 2636 /* this formula differs from the one in periodic_reify because we do not always round up */
1349 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; 2637 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1350 } 2638 }
2639 else
2640 ev_at (w) = w->offset;
1351 2641
2642 EV_FREQUENT_CHECK;
2643
2644 ++periodiccnt;
1352 ev_start (EV_A_ (W)w, ++periodiccnt); 2645 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1353 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); 2646 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1354 periodics [periodiccnt - 1] = w; 2647 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1355 upheap ((WT *)periodics, periodiccnt - 1); 2648 ANHE_at_cache (periodics [ev_active (w)]);
2649 upheap (periodics, ev_active (w));
1356 2650
2651 EV_FREQUENT_CHECK;
2652
1357 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2653 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1358} 2654}
1359 2655
1360void 2656void noinline
1361ev_periodic_stop (EV_P_ struct ev_periodic *w) 2657ev_periodic_stop (EV_P_ ev_periodic *w)
1362{ 2658{
1363 ev_clear_pending (EV_A_ (W)w); 2659 clear_pending (EV_A_ (W)w);
1364 if (!ev_is_active (w)) 2660 if (expect_false (!ev_is_active (w)))
1365 return; 2661 return;
1366 2662
2663 EV_FREQUENT_CHECK;
2664
2665 {
2666 int active = ev_active (w);
2667
1367 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2668 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1368 2669
1369 if (((W)w)->active < periodiccnt--) 2670 --periodiccnt;
2671
2672 if (expect_true (active < periodiccnt + HEAP0))
1370 { 2673 {
1371 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2674 periodics [active] = periodics [periodiccnt + HEAP0];
1372 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2675 adjustheap (periodics, periodiccnt, active);
1373 } 2676 }
2677 }
2678
2679 EV_FREQUENT_CHECK;
1374 2680
1375 ev_stop (EV_A_ (W)w); 2681 ev_stop (EV_A_ (W)w);
1376} 2682}
1377 2683
1378void 2684void noinline
1379ev_periodic_again (EV_P_ struct ev_periodic *w) 2685ev_periodic_again (EV_P_ ev_periodic *w)
1380{ 2686{
2687 /* TODO: use adjustheap and recalculation */
1381 ev_periodic_stop (EV_A_ w); 2688 ev_periodic_stop (EV_A_ w);
1382 ev_periodic_start (EV_A_ w); 2689 ev_periodic_start (EV_A_ w);
1383} 2690}
1384 2691#endif
1385void
1386ev_idle_start (EV_P_ struct ev_idle *w)
1387{
1388 if (ev_is_active (w))
1389 return;
1390
1391 ev_start (EV_A_ (W)w, ++idlecnt);
1392 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1393 idles [idlecnt - 1] = w;
1394}
1395
1396void
1397ev_idle_stop (EV_P_ struct ev_idle *w)
1398{
1399 ev_clear_pending (EV_A_ (W)w);
1400 if (ev_is_active (w))
1401 return;
1402
1403 idles [((W)w)->active - 1] = idles [--idlecnt];
1404 ev_stop (EV_A_ (W)w);
1405}
1406
1407void
1408ev_prepare_start (EV_P_ struct ev_prepare *w)
1409{
1410 if (ev_is_active (w))
1411 return;
1412
1413 ev_start (EV_A_ (W)w, ++preparecnt);
1414 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1415 prepares [preparecnt - 1] = w;
1416}
1417
1418void
1419ev_prepare_stop (EV_P_ struct ev_prepare *w)
1420{
1421 ev_clear_pending (EV_A_ (W)w);
1422 if (ev_is_active (w))
1423 return;
1424
1425 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1426 ev_stop (EV_A_ (W)w);
1427}
1428
1429void
1430ev_check_start (EV_P_ struct ev_check *w)
1431{
1432 if (ev_is_active (w))
1433 return;
1434
1435 ev_start (EV_A_ (W)w, ++checkcnt);
1436 array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1437 checks [checkcnt - 1] = w;
1438}
1439
1440void
1441ev_check_stop (EV_P_ struct ev_check *w)
1442{
1443 ev_clear_pending (EV_A_ (W)w);
1444 if (ev_is_active (w))
1445 return;
1446
1447 checks [((W)w)->active - 1] = checks [--checkcnt];
1448 ev_stop (EV_A_ (W)w);
1449}
1450 2692
1451#ifndef SA_RESTART 2693#ifndef SA_RESTART
1452# define SA_RESTART 0 2694# define SA_RESTART 0
1453#endif 2695#endif
1454 2696
1455void 2697void noinline
1456ev_signal_start (EV_P_ struct ev_signal *w) 2698ev_signal_start (EV_P_ ev_signal *w)
1457{ 2699{
2700 if (expect_false (ev_is_active (w)))
2701 return;
2702
2703 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2704
1458#if EV_MULTIPLICITY 2705#if EV_MULTIPLICITY
1459 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2706 assert (("libev: a signal must not be attached to two different loops",
2707 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2708
2709 signals [w->signum - 1].loop = EV_A;
2710#endif
2711
2712 EV_FREQUENT_CHECK;
2713
2714#if EV_USE_SIGNALFD
2715 if (sigfd == -2)
2716 {
2717 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2718 if (sigfd < 0 && errno == EINVAL)
2719 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2720
2721 if (sigfd >= 0)
2722 {
2723 fd_intern (sigfd); /* doing it twice will not hurt */
2724
2725 sigemptyset (&sigfd_set);
2726
2727 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2728 ev_set_priority (&sigfd_w, EV_MAXPRI);
2729 ev_io_start (EV_A_ &sigfd_w);
2730 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2731 }
2732 }
2733
2734 if (sigfd >= 0)
2735 {
2736 /* TODO: check .head */
2737 sigaddset (&sigfd_set, w->signum);
2738 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2739
2740 signalfd (sigfd, &sigfd_set, 0);
2741 }
2742#endif
2743
2744 ev_start (EV_A_ (W)w, 1);
2745 wlist_add (&signals [w->signum - 1].head, (WL)w);
2746
2747 if (!((WL)w)->next)
2748# if EV_USE_SIGNALFD
2749 if (sigfd < 0) /*TODO*/
1460#endif 2750# endif
1461 if (ev_is_active (w)) 2751 {
2752# ifdef _WIN32
2753 evpipe_init (EV_A);
2754
2755 signal (w->signum, ev_sighandler);
2756# else
2757 struct sigaction sa;
2758
2759 evpipe_init (EV_A);
2760
2761 sa.sa_handler = ev_sighandler;
2762 sigfillset (&sa.sa_mask);
2763 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2764 sigaction (w->signum, &sa, 0);
2765
2766 sigemptyset (&sa.sa_mask);
2767 sigaddset (&sa.sa_mask, w->signum);
2768 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2769#endif
2770 }
2771
2772 EV_FREQUENT_CHECK;
2773}
2774
2775void noinline
2776ev_signal_stop (EV_P_ ev_signal *w)
2777{
2778 clear_pending (EV_A_ (W)w);
2779 if (expect_false (!ev_is_active (w)))
1462 return; 2780 return;
1463 2781
1464 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2782 EV_FREQUENT_CHECK;
2783
2784 wlist_del (&signals [w->signum - 1].head, (WL)w);
2785 ev_stop (EV_A_ (W)w);
2786
2787 if (!signals [w->signum - 1].head)
2788 {
2789#if EV_MULTIPLICITY
2790 signals [w->signum - 1].loop = 0; /* unattach from signal */
2791#endif
2792#if EV_USE_SIGNALFD
2793 if (sigfd >= 0)
2794 {
2795 sigset_t ss;
2796
2797 sigemptyset (&ss);
2798 sigaddset (&ss, w->signum);
2799 sigdelset (&sigfd_set, w->signum);
2800
2801 signalfd (sigfd, &sigfd_set, 0);
2802 sigprocmask (SIG_UNBLOCK, &ss, 0);
2803 }
2804 else
2805#endif
2806 signal (w->signum, SIG_DFL);
2807 }
2808
2809 EV_FREQUENT_CHECK;
2810}
2811
2812void
2813ev_child_start (EV_P_ ev_child *w)
2814{
2815#if EV_MULTIPLICITY
2816 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2817#endif
2818 if (expect_false (ev_is_active (w)))
2819 return;
2820
2821 EV_FREQUENT_CHECK;
1465 2822
1466 ev_start (EV_A_ (W)w, 1); 2823 ev_start (EV_A_ (W)w, 1);
1467 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 2824 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1468 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1469 2825
1470 if (!((WL)w)->next) 2826 EV_FREQUENT_CHECK;
2827}
2828
2829void
2830ev_child_stop (EV_P_ ev_child *w)
2831{
2832 clear_pending (EV_A_ (W)w);
2833 if (expect_false (!ev_is_active (w)))
2834 return;
2835
2836 EV_FREQUENT_CHECK;
2837
2838 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2839 ev_stop (EV_A_ (W)w);
2840
2841 EV_FREQUENT_CHECK;
2842}
2843
2844#if EV_STAT_ENABLE
2845
2846# ifdef _WIN32
2847# undef lstat
2848# define lstat(a,b) _stati64 (a,b)
2849# endif
2850
2851#define DEF_STAT_INTERVAL 5.0074891
2852#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2853#define MIN_STAT_INTERVAL 0.1074891
2854
2855static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2856
2857#if EV_USE_INOTIFY
2858# define EV_INOTIFY_BUFSIZE 8192
2859
2860static void noinline
2861infy_add (EV_P_ ev_stat *w)
2862{
2863 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);
2864
2865 if (w->wd >= 0)
2866 {
2867 struct statfs sfs;
2868
2869 /* now local changes will be tracked by inotify, but remote changes won't */
2870 /* unless the filesystem is known to be local, we therefore still poll */
2871 /* also do poll on <2.6.25, but with normal frequency */
2872
2873 if (!fs_2625)
2874 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2875 else if (!statfs (w->path, &sfs)
2876 && (sfs.f_type == 0x1373 /* devfs */
2877 || sfs.f_type == 0xEF53 /* ext2/3 */
2878 || sfs.f_type == 0x3153464a /* jfs */
2879 || sfs.f_type == 0x52654973 /* reiser3 */
2880 || sfs.f_type == 0x01021994 /* tempfs */
2881 || sfs.f_type == 0x58465342 /* xfs */))
2882 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2883 else
2884 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1471 { 2885 }
1472#if WIN32 2886 else
1473 signal (w->signum, sighandler); 2887 {
2888 /* can't use inotify, continue to stat */
2889 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2890
2891 /* if path is not there, monitor some parent directory for speedup hints */
2892 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2893 /* but an efficiency issue only */
2894 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2895 {
2896 char path [4096];
2897 strcpy (path, w->path);
2898
2899 do
2900 {
2901 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2902 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2903
2904 char *pend = strrchr (path, '/');
2905
2906 if (!pend || pend == path)
2907 break;
2908
2909 *pend = 0;
2910 w->wd = inotify_add_watch (fs_fd, path, mask);
2911 }
2912 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2913 }
2914 }
2915
2916 if (w->wd >= 0)
2917 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2918
2919 /* now re-arm timer, if required */
2920 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2921 ev_timer_again (EV_A_ &w->timer);
2922 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2923}
2924
2925static void noinline
2926infy_del (EV_P_ ev_stat *w)
2927{
2928 int slot;
2929 int wd = w->wd;
2930
2931 if (wd < 0)
2932 return;
2933
2934 w->wd = -2;
2935 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2936 wlist_del (&fs_hash [slot].head, (WL)w);
2937
2938 /* remove this watcher, if others are watching it, they will rearm */
2939 inotify_rm_watch (fs_fd, wd);
2940}
2941
2942static void noinline
2943infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2944{
2945 if (slot < 0)
2946 /* overflow, need to check for all hash slots */
2947 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2948 infy_wd (EV_A_ slot, wd, ev);
2949 else
2950 {
2951 WL w_;
2952
2953 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2954 {
2955 ev_stat *w = (ev_stat *)w_;
2956 w_ = w_->next; /* lets us remove this watcher and all before it */
2957
2958 if (w->wd == wd || wd == -1)
2959 {
2960 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2961 {
2962 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2963 w->wd = -1;
2964 infy_add (EV_A_ w); /* re-add, no matter what */
2965 }
2966
2967 stat_timer_cb (EV_A_ &w->timer, 0);
2968 }
2969 }
2970 }
2971}
2972
2973static void
2974infy_cb (EV_P_ ev_io *w, int revents)
2975{
2976 char buf [EV_INOTIFY_BUFSIZE];
2977 struct inotify_event *ev = (struct inotify_event *)buf;
2978 int ofs;
2979 int len = read (fs_fd, buf, sizeof (buf));
2980
2981 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2982 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2983}
2984
2985inline_size void
2986check_2625 (EV_P)
2987{
2988 /* kernels < 2.6.25 are borked
2989 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2990 */
2991 struct utsname buf;
2992 int major, minor, micro;
2993
2994 if (uname (&buf))
2995 return;
2996
2997 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2998 return;
2999
3000 if (major < 2
3001 || (major == 2 && minor < 6)
3002 || (major == 2 && minor == 6 && micro < 25))
3003 return;
3004
3005 fs_2625 = 1;
3006}
3007
3008inline_size int
3009infy_newfd (void)
3010{
3011#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3012 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3013 if (fd >= 0)
3014 return fd;
3015#endif
3016 return inotify_init ();
3017}
3018
3019inline_size void
3020infy_init (EV_P)
3021{
3022 if (fs_fd != -2)
3023 return;
3024
3025 fs_fd = -1;
3026
3027 check_2625 (EV_A);
3028
3029 fs_fd = infy_newfd ();
3030
3031 if (fs_fd >= 0)
3032 {
3033 fd_intern (fs_fd);
3034 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3035 ev_set_priority (&fs_w, EV_MAXPRI);
3036 ev_io_start (EV_A_ &fs_w);
3037 ev_unref (EV_A);
3038 }
3039}
3040
3041inline_size void
3042infy_fork (EV_P)
3043{
3044 int slot;
3045
3046 if (fs_fd < 0)
3047 return;
3048
3049 ev_ref (EV_A);
3050 ev_io_stop (EV_A_ &fs_w);
3051 close (fs_fd);
3052 fs_fd = infy_newfd ();
3053
3054 if (fs_fd >= 0)
3055 {
3056 fd_intern (fs_fd);
3057 ev_io_set (&fs_w, fs_fd, EV_READ);
3058 ev_io_start (EV_A_ &fs_w);
3059 ev_unref (EV_A);
3060 }
3061
3062 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
3063 {
3064 WL w_ = fs_hash [slot].head;
3065 fs_hash [slot].head = 0;
3066
3067 while (w_)
3068 {
3069 ev_stat *w = (ev_stat *)w_;
3070 w_ = w_->next; /* lets us add this watcher */
3071
3072 w->wd = -1;
3073
3074 if (fs_fd >= 0)
3075 infy_add (EV_A_ w); /* re-add, no matter what */
3076 else
3077 {
3078 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3079 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3080 ev_timer_again (EV_A_ &w->timer);
3081 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3082 }
3083 }
3084 }
3085}
3086
3087#endif
3088
3089#ifdef _WIN32
3090# define EV_LSTAT(p,b) _stati64 (p, b)
1474#else 3091#else
1475 struct sigaction sa; 3092# define EV_LSTAT(p,b) lstat (p, b)
1476 sa.sa_handler = sighandler;
1477 sigfillset (&sa.sa_mask);
1478 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1479 sigaction (w->signum, &sa, 0);
1480#endif 3093#endif
1481 }
1482}
1483 3094
1484void 3095void
1485ev_signal_stop (EV_P_ struct ev_signal *w) 3096ev_stat_stat (EV_P_ ev_stat *w)
1486{ 3097{
1487 ev_clear_pending (EV_A_ (W)w); 3098 if (lstat (w->path, &w->attr) < 0)
1488 if (!ev_is_active (w)) 3099 w->attr.st_nlink = 0;
3100 else if (!w->attr.st_nlink)
3101 w->attr.st_nlink = 1;
3102}
3103
3104static void noinline
3105stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3106{
3107 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3108
3109 ev_statdata prev = w->attr;
3110 ev_stat_stat (EV_A_ w);
3111
3112 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3113 if (
3114 prev.st_dev != w->attr.st_dev
3115 || prev.st_ino != w->attr.st_ino
3116 || prev.st_mode != w->attr.st_mode
3117 || prev.st_nlink != w->attr.st_nlink
3118 || prev.st_uid != w->attr.st_uid
3119 || prev.st_gid != w->attr.st_gid
3120 || prev.st_rdev != w->attr.st_rdev
3121 || prev.st_size != w->attr.st_size
3122 || prev.st_atime != w->attr.st_atime
3123 || prev.st_mtime != w->attr.st_mtime
3124 || prev.st_ctime != w->attr.st_ctime
3125 ) {
3126 /* we only update w->prev on actual differences */
3127 /* in case we test more often than invoke the callback, */
3128 /* to ensure that prev is always different to attr */
3129 w->prev = prev;
3130
3131 #if EV_USE_INOTIFY
3132 if (fs_fd >= 0)
3133 {
3134 infy_del (EV_A_ w);
3135 infy_add (EV_A_ w);
3136 ev_stat_stat (EV_A_ w); /* avoid race... */
3137 }
3138 #endif
3139
3140 ev_feed_event (EV_A_ w, EV_STAT);
3141 }
3142}
3143
3144void
3145ev_stat_start (EV_P_ ev_stat *w)
3146{
3147 if (expect_false (ev_is_active (w)))
1489 return; 3148 return;
1490 3149
1491 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3150 ev_stat_stat (EV_A_ w);
3151
3152 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3153 w->interval = MIN_STAT_INTERVAL;
3154
3155 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3156 ev_set_priority (&w->timer, ev_priority (w));
3157
3158#if EV_USE_INOTIFY
3159 infy_init (EV_A);
3160
3161 if (fs_fd >= 0)
3162 infy_add (EV_A_ w);
3163 else
3164#endif
3165 {
3166 ev_timer_again (EV_A_ &w->timer);
3167 ev_unref (EV_A);
3168 }
3169
3170 ev_start (EV_A_ (W)w, 1);
3171
3172 EV_FREQUENT_CHECK;
3173}
3174
3175void
3176ev_stat_stop (EV_P_ ev_stat *w)
3177{
3178 clear_pending (EV_A_ (W)w);
3179 if (expect_false (!ev_is_active (w)))
3180 return;
3181
3182 EV_FREQUENT_CHECK;
3183
3184#if EV_USE_INOTIFY
3185 infy_del (EV_A_ w);
3186#endif
3187
3188 if (ev_is_active (&w->timer))
3189 {
3190 ev_ref (EV_A);
3191 ev_timer_stop (EV_A_ &w->timer);
3192 }
3193
1492 ev_stop (EV_A_ (W)w); 3194 ev_stop (EV_A_ (W)w);
1493 3195
1494 if (!signals [w->signum - 1].head) 3196 EV_FREQUENT_CHECK;
1495 signal (w->signum, SIG_DFL);
1496} 3197}
3198#endif
1497 3199
3200#if EV_IDLE_ENABLE
1498void 3201void
1499ev_child_start (EV_P_ struct ev_child *w) 3202ev_idle_start (EV_P_ ev_idle *w)
1500{ 3203{
1501#if EV_MULTIPLICITY
1502 assert (("child watchers are only supported in the default loop", loop == default_loop));
1503#endif
1504 if (ev_is_active (w)) 3204 if (expect_false (ev_is_active (w)))
1505 return; 3205 return;
1506 3206
3207 pri_adjust (EV_A_ (W)w);
3208
3209 EV_FREQUENT_CHECK;
3210
3211 {
3212 int active = ++idlecnt [ABSPRI (w)];
3213
3214 ++idleall;
3215 ev_start (EV_A_ (W)w, active);
3216
3217 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3218 idles [ABSPRI (w)][active - 1] = w;
3219 }
3220
3221 EV_FREQUENT_CHECK;
3222}
3223
3224void
3225ev_idle_stop (EV_P_ ev_idle *w)
3226{
3227 clear_pending (EV_A_ (W)w);
3228 if (expect_false (!ev_is_active (w)))
3229 return;
3230
3231 EV_FREQUENT_CHECK;
3232
3233 {
3234 int active = ev_active (w);
3235
3236 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3237 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3238
3239 ev_stop (EV_A_ (W)w);
3240 --idleall;
3241 }
3242
3243 EV_FREQUENT_CHECK;
3244}
3245#endif
3246
3247void
3248ev_prepare_start (EV_P_ ev_prepare *w)
3249{
3250 if (expect_false (ev_is_active (w)))
3251 return;
3252
3253 EV_FREQUENT_CHECK;
3254
3255 ev_start (EV_A_ (W)w, ++preparecnt);
3256 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3257 prepares [preparecnt - 1] = w;
3258
3259 EV_FREQUENT_CHECK;
3260}
3261
3262void
3263ev_prepare_stop (EV_P_ ev_prepare *w)
3264{
3265 clear_pending (EV_A_ (W)w);
3266 if (expect_false (!ev_is_active (w)))
3267 return;
3268
3269 EV_FREQUENT_CHECK;
3270
3271 {
3272 int active = ev_active (w);
3273
3274 prepares [active - 1] = prepares [--preparecnt];
3275 ev_active (prepares [active - 1]) = active;
3276 }
3277
3278 ev_stop (EV_A_ (W)w);
3279
3280 EV_FREQUENT_CHECK;
3281}
3282
3283void
3284ev_check_start (EV_P_ ev_check *w)
3285{
3286 if (expect_false (ev_is_active (w)))
3287 return;
3288
3289 EV_FREQUENT_CHECK;
3290
3291 ev_start (EV_A_ (W)w, ++checkcnt);
3292 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3293 checks [checkcnt - 1] = w;
3294
3295 EV_FREQUENT_CHECK;
3296}
3297
3298void
3299ev_check_stop (EV_P_ ev_check *w)
3300{
3301 clear_pending (EV_A_ (W)w);
3302 if (expect_false (!ev_is_active (w)))
3303 return;
3304
3305 EV_FREQUENT_CHECK;
3306
3307 {
3308 int active = ev_active (w);
3309
3310 checks [active - 1] = checks [--checkcnt];
3311 ev_active (checks [active - 1]) = active;
3312 }
3313
3314 ev_stop (EV_A_ (W)w);
3315
3316 EV_FREQUENT_CHECK;
3317}
3318
3319#if EV_EMBED_ENABLE
3320void noinline
3321ev_embed_sweep (EV_P_ ev_embed *w)
3322{
3323 ev_loop (w->other, EVLOOP_NONBLOCK);
3324}
3325
3326static void
3327embed_io_cb (EV_P_ ev_io *io, int revents)
3328{
3329 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3330
3331 if (ev_cb (w))
3332 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3333 else
3334 ev_loop (w->other, EVLOOP_NONBLOCK);
3335}
3336
3337static void
3338embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3339{
3340 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3341
3342 {
3343 EV_P = w->other;
3344
3345 while (fdchangecnt)
3346 {
3347 fd_reify (EV_A);
3348 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3349 }
3350 }
3351}
3352
3353static void
3354embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3355{
3356 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3357
3358 ev_embed_stop (EV_A_ w);
3359
3360 {
3361 EV_P = w->other;
3362
3363 ev_loop_fork (EV_A);
3364 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3365 }
3366
3367 ev_embed_start (EV_A_ w);
3368}
3369
3370#if 0
3371static void
3372embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3373{
3374 ev_idle_stop (EV_A_ idle);
3375}
3376#endif
3377
3378void
3379ev_embed_start (EV_P_ ev_embed *w)
3380{
3381 if (expect_false (ev_is_active (w)))
3382 return;
3383
3384 {
3385 EV_P = w->other;
3386 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3387 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3388 }
3389
3390 EV_FREQUENT_CHECK;
3391
3392 ev_set_priority (&w->io, ev_priority (w));
3393 ev_io_start (EV_A_ &w->io);
3394
3395 ev_prepare_init (&w->prepare, embed_prepare_cb);
3396 ev_set_priority (&w->prepare, EV_MINPRI);
3397 ev_prepare_start (EV_A_ &w->prepare);
3398
3399 ev_fork_init (&w->fork, embed_fork_cb);
3400 ev_fork_start (EV_A_ &w->fork);
3401
3402 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3403
1507 ev_start (EV_A_ (W)w, 1); 3404 ev_start (EV_A_ (W)w, 1);
1508 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1509}
1510 3405
3406 EV_FREQUENT_CHECK;
3407}
3408
1511void 3409void
1512ev_child_stop (EV_P_ struct ev_child *w) 3410ev_embed_stop (EV_P_ ev_embed *w)
1513{ 3411{
1514 ev_clear_pending (EV_A_ (W)w); 3412 clear_pending (EV_A_ (W)w);
1515 if (ev_is_active (w)) 3413 if (expect_false (!ev_is_active (w)))
1516 return; 3414 return;
1517 3415
1518 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 3416 EV_FREQUENT_CHECK;
3417
3418 ev_io_stop (EV_A_ &w->io);
3419 ev_prepare_stop (EV_A_ &w->prepare);
3420 ev_fork_stop (EV_A_ &w->fork);
3421
3422 EV_FREQUENT_CHECK;
3423}
3424#endif
3425
3426#if EV_FORK_ENABLE
3427void
3428ev_fork_start (EV_P_ ev_fork *w)
3429{
3430 if (expect_false (ev_is_active (w)))
3431 return;
3432
3433 EV_FREQUENT_CHECK;
3434
3435 ev_start (EV_A_ (W)w, ++forkcnt);
3436 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3437 forks [forkcnt - 1] = w;
3438
3439 EV_FREQUENT_CHECK;
3440}
3441
3442void
3443ev_fork_stop (EV_P_ ev_fork *w)
3444{
3445 clear_pending (EV_A_ (W)w);
3446 if (expect_false (!ev_is_active (w)))
3447 return;
3448
3449 EV_FREQUENT_CHECK;
3450
3451 {
3452 int active = ev_active (w);
3453
3454 forks [active - 1] = forks [--forkcnt];
3455 ev_active (forks [active - 1]) = active;
3456 }
3457
1519 ev_stop (EV_A_ (W)w); 3458 ev_stop (EV_A_ (W)w);
3459
3460 EV_FREQUENT_CHECK;
1520} 3461}
3462#endif
3463
3464#if EV_ASYNC_ENABLE
3465void
3466ev_async_start (EV_P_ ev_async *w)
3467{
3468 if (expect_false (ev_is_active (w)))
3469 return;
3470
3471 evpipe_init (EV_A);
3472
3473 EV_FREQUENT_CHECK;
3474
3475 ev_start (EV_A_ (W)w, ++asynccnt);
3476 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3477 asyncs [asynccnt - 1] = w;
3478
3479 EV_FREQUENT_CHECK;
3480}
3481
3482void
3483ev_async_stop (EV_P_ ev_async *w)
3484{
3485 clear_pending (EV_A_ (W)w);
3486 if (expect_false (!ev_is_active (w)))
3487 return;
3488
3489 EV_FREQUENT_CHECK;
3490
3491 {
3492 int active = ev_active (w);
3493
3494 asyncs [active - 1] = asyncs [--asynccnt];
3495 ev_active (asyncs [active - 1]) = active;
3496 }
3497
3498 ev_stop (EV_A_ (W)w);
3499
3500 EV_FREQUENT_CHECK;
3501}
3502
3503void
3504ev_async_send (EV_P_ ev_async *w)
3505{
3506 w->sent = 1;
3507 evpipe_write (EV_A_ &async_pending);
3508}
3509#endif
1521 3510
1522/*****************************************************************************/ 3511/*****************************************************************************/
1523 3512
1524struct ev_once 3513struct ev_once
1525{ 3514{
1526 struct ev_io io; 3515 ev_io io;
1527 struct ev_timer to; 3516 ev_timer to;
1528 void (*cb)(int revents, void *arg); 3517 void (*cb)(int revents, void *arg);
1529 void *arg; 3518 void *arg;
1530}; 3519};
1531 3520
1532static void 3521static void
1533once_cb (EV_P_ struct ev_once *once, int revents) 3522once_cb (EV_P_ struct ev_once *once, int revents)
1534{ 3523{
1535 void (*cb)(int revents, void *arg) = once->cb; 3524 void (*cb)(int revents, void *arg) = once->cb;
1536 void *arg = once->arg; 3525 void *arg = once->arg;
1537 3526
1538 ev_io_stop (EV_A_ &once->io); 3527 ev_io_stop (EV_A_ &once->io);
1539 ev_timer_stop (EV_A_ &once->to); 3528 ev_timer_stop (EV_A_ &once->to);
1540 ev_free (once); 3529 ev_free (once);
1541 3530
1542 cb (revents, arg); 3531 cb (revents, arg);
1543} 3532}
1544 3533
1545static void 3534static void
1546once_cb_io (EV_P_ struct ev_io *w, int revents) 3535once_cb_io (EV_P_ ev_io *w, int revents)
1547{ 3536{
1548 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3537 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3538
3539 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1549} 3540}
1550 3541
1551static void 3542static void
1552once_cb_to (EV_P_ struct ev_timer *w, int revents) 3543once_cb_to (EV_P_ ev_timer *w, int revents)
1553{ 3544{
1554 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3545 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3546
3547 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1555} 3548}
1556 3549
1557void 3550void
1558ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3551ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1559{ 3552{
1560 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 3553 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1561 3554
1562 if (!once) 3555 if (expect_false (!once))
3556 {
1563 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3557 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1564 else 3558 return;
1565 { 3559 }
3560
1566 once->cb = cb; 3561 once->cb = cb;
1567 once->arg = arg; 3562 once->arg = arg;
1568 3563
1569 ev_watcher_init (&once->io, once_cb_io); 3564 ev_init (&once->io, once_cb_io);
1570 if (fd >= 0) 3565 if (fd >= 0)
3566 {
3567 ev_io_set (&once->io, fd, events);
3568 ev_io_start (EV_A_ &once->io);
3569 }
3570
3571 ev_init (&once->to, once_cb_to);
3572 if (timeout >= 0.)
3573 {
3574 ev_timer_set (&once->to, timeout, 0.);
3575 ev_timer_start (EV_A_ &once->to);
3576 }
3577}
3578
3579/*****************************************************************************/
3580
3581#if EV_WALK_ENABLE
3582void
3583ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3584{
3585 int i, j;
3586 ev_watcher_list *wl, *wn;
3587
3588 if (types & (EV_IO | EV_EMBED))
3589 for (i = 0; i < anfdmax; ++i)
3590 for (wl = anfds [i].head; wl; )
1571 { 3591 {
1572 ev_io_set (&once->io, fd, events); 3592 wn = wl->next;
1573 ev_io_start (EV_A_ &once->io); 3593
3594#if EV_EMBED_ENABLE
3595 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3596 {
3597 if (types & EV_EMBED)
3598 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3599 }
3600 else
3601#endif
3602#if EV_USE_INOTIFY
3603 if (ev_cb ((ev_io *)wl) == infy_cb)
3604 ;
3605 else
3606#endif
3607 if ((ev_io *)wl != &pipe_w)
3608 if (types & EV_IO)
3609 cb (EV_A_ EV_IO, wl);
3610
3611 wl = wn;
1574 } 3612 }
1575 3613
1576 ev_watcher_init (&once->to, once_cb_to); 3614 if (types & (EV_TIMER | EV_STAT))
1577 if (timeout >= 0.) 3615 for (i = timercnt + HEAP0; i-- > HEAP0; )
3616#if EV_STAT_ENABLE
3617 /*TODO: timer is not always active*/
3618 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1578 { 3619 {
1579 ev_timer_set (&once->to, timeout, 0.); 3620 if (types & EV_STAT)
1580 ev_timer_start (EV_A_ &once->to); 3621 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1581 } 3622 }
1582 } 3623 else
1583} 3624#endif
3625 if (types & EV_TIMER)
3626 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1584 3627
3628#if EV_PERIODIC_ENABLE
3629 if (types & EV_PERIODIC)
3630 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3631 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3632#endif
3633
3634#if EV_IDLE_ENABLE
3635 if (types & EV_IDLE)
3636 for (j = NUMPRI; i--; )
3637 for (i = idlecnt [j]; i--; )
3638 cb (EV_A_ EV_IDLE, idles [j][i]);
3639#endif
3640
3641#if EV_FORK_ENABLE
3642 if (types & EV_FORK)
3643 for (i = forkcnt; i--; )
3644 if (ev_cb (forks [i]) != embed_fork_cb)
3645 cb (EV_A_ EV_FORK, forks [i]);
3646#endif
3647
3648#if EV_ASYNC_ENABLE
3649 if (types & EV_ASYNC)
3650 for (i = asynccnt; i--; )
3651 cb (EV_A_ EV_ASYNC, asyncs [i]);
3652#endif
3653
3654 if (types & EV_PREPARE)
3655 for (i = preparecnt; i--; )
3656#if EV_EMBED_ENABLE
3657 if (ev_cb (prepares [i]) != embed_prepare_cb)
3658#endif
3659 cb (EV_A_ EV_PREPARE, prepares [i]);
3660
3661 if (types & EV_CHECK)
3662 for (i = checkcnt; i--; )
3663 cb (EV_A_ EV_CHECK, checks [i]);
3664
3665 if (types & EV_SIGNAL)
3666 for (i = 0; i < EV_NSIG - 1; ++i)
3667 for (wl = signals [i].head; wl; )
3668 {
3669 wn = wl->next;
3670 cb (EV_A_ EV_SIGNAL, wl);
3671 wl = wn;
3672 }
3673
3674 if (types & EV_CHILD)
3675 for (i = EV_PID_HASHSIZE; i--; )
3676 for (wl = childs [i]; wl; )
3677 {
3678 wn = wl->next;
3679 cb (EV_A_ EV_CHILD, wl);
3680 wl = wn;
3681 }
3682/* EV_STAT 0x00001000 /* stat data changed */
3683/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3684}
3685#endif
3686
3687#if EV_MULTIPLICITY
3688 #include "ev_wrap.h"
3689#endif
3690
3691#ifdef __cplusplus
3692}
3693#endif
3694

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