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Comparing libev/ev.c (file contents):
Revision 1.22 by root, Wed Oct 31 19:07:43 2007 UTC vs.
Revision 1.208 by root, Fri Feb 1 13:22:48 2008 UTC

1/* 1/*
2 * libev event processing core, watcher management
3 *
2 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
3 * All rights reserved. 5 * All rights reserved.
4 * 6 *
5 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
6 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
7 * 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.
8 * 27 *
9 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
10 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
11 * 30 * in which case the provisions of the GPL are applicable instead of
12 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
13 * 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
14 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
15 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
16 * 35 * and other provisions required by the GPL. If you do not delete the
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */ 38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44#ifndef EV_STANDALONE
45# ifdef EV_CONFIG_H
46# include EV_CONFIG_H
47# else
48# include "config.h"
49# endif
50
51# if HAVE_CLOCK_GETTIME
52# ifndef EV_USE_MONOTONIC
53# define EV_USE_MONOTONIC 1
54# endif
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 1
57# endif
58# else
59# ifndef EV_USE_MONOTONIC
60# define EV_USE_MONOTONIC 0
61# endif
62# ifndef EV_USE_REALTIME
63# define EV_USE_REALTIME 0
64# endif
65# endif
66
67# ifndef EV_USE_NANOSLEEP
68# if HAVE_NANOSLEEP
69# define EV_USE_NANOSLEEP 1
70# else
71# define EV_USE_NANOSLEEP 0
72# endif
73# endif
74
75# ifndef EV_USE_SELECT
76# if HAVE_SELECT && HAVE_SYS_SELECT_H
77# define EV_USE_SELECT 1
78# else
79# define EV_USE_SELECT 0
80# endif
81# endif
82
83# ifndef EV_USE_POLL
84# if HAVE_POLL && HAVE_POLL_H
85# define EV_USE_POLL 1
86# else
87# define EV_USE_POLL 0
88# endif
89# endif
90
91# ifndef EV_USE_EPOLL
92# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
93# define EV_USE_EPOLL 1
94# else
95# define EV_USE_EPOLL 0
96# endif
97# endif
98
99# ifndef EV_USE_KQUEUE
100# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
101# define EV_USE_KQUEUE 1
102# else
103# define EV_USE_KQUEUE 0
104# endif
105# endif
106
107# ifndef EV_USE_PORT
108# if HAVE_PORT_H && HAVE_PORT_CREATE
109# define EV_USE_PORT 1
110# else
111# define EV_USE_PORT 0
112# endif
113# endif
114
115# ifndef EV_USE_INOTIFY
116# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
117# define EV_USE_INOTIFY 1
118# else
119# define EV_USE_INOTIFY 0
120# endif
121# endif
122
123#endif
29 124
30#include <math.h> 125#include <math.h>
31#include <stdlib.h> 126#include <stdlib.h>
32#include <unistd.h>
33#include <fcntl.h> 127#include <fcntl.h>
34#include <signal.h>
35#include <stddef.h> 128#include <stddef.h>
36 129
37#include <stdio.h> 130#include <stdio.h>
38 131
39#include <assert.h> 132#include <assert.h>
40#include <errno.h> 133#include <errno.h>
41#include <sys/types.h> 134#include <sys/types.h>
42#include <sys/wait.h>
43#include <sys/time.h>
44#include <time.h> 135#include <time.h>
45 136
46#ifndef HAVE_MONOTONIC 137#include <signal.h>
47# ifdef CLOCK_MONOTONIC 138
48# define HAVE_MONOTONIC 1 139#ifdef EV_H
140# include EV_H
141#else
142# include "ev.h"
143#endif
144
145#ifndef _WIN32
146# include <sys/time.h>
147# include <sys/wait.h>
148# include <unistd.h>
149#else
150# define WIN32_LEAN_AND_MEAN
151# include <windows.h>
152# ifndef EV_SELECT_IS_WINSOCKET
153# define EV_SELECT_IS_WINSOCKET 1
49# endif 154# endif
50#endif 155#endif
51 156
157/**/
158
159#ifndef EV_USE_MONOTONIC
160# define EV_USE_MONOTONIC 0
161#endif
162
163#ifndef EV_USE_REALTIME
164# define EV_USE_REALTIME 0
165#endif
166
167#ifndef EV_USE_NANOSLEEP
168# define EV_USE_NANOSLEEP 0
169#endif
170
52#ifndef HAVE_SELECT 171#ifndef EV_USE_SELECT
53# define HAVE_SELECT 1 172# define EV_USE_SELECT 1
173#endif
174
175#ifndef EV_USE_POLL
176# ifdef _WIN32
177# define EV_USE_POLL 0
178# else
179# define EV_USE_POLL 1
54#endif 180# endif
181#endif
55 182
56#ifndef HAVE_EPOLL 183#ifndef EV_USE_EPOLL
57# define HAVE_EPOLL 0 184# define EV_USE_EPOLL 0
185#endif
186
187#ifndef EV_USE_KQUEUE
188# define EV_USE_KQUEUE 0
189#endif
190
191#ifndef EV_USE_PORT
192# define EV_USE_PORT 0
193#endif
194
195#ifndef EV_USE_INOTIFY
196# define EV_USE_INOTIFY 0
197#endif
198
199#ifndef EV_PID_HASHSIZE
200# if EV_MINIMAL
201# define EV_PID_HASHSIZE 1
202# else
203# define EV_PID_HASHSIZE 16
58#endif 204# endif
205#endif
59 206
60#ifndef HAVE_REALTIME 207#ifndef EV_INOTIFY_HASHSIZE
61# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ 208# if EV_MINIMAL
209# define EV_INOTIFY_HASHSIZE 1
210# else
211# define EV_INOTIFY_HASHSIZE 16
62#endif 212# endif
213#endif
214
215/**/
216
217#ifndef CLOCK_MONOTONIC
218# undef EV_USE_MONOTONIC
219# define EV_USE_MONOTONIC 0
220#endif
221
222#ifndef CLOCK_REALTIME
223# undef EV_USE_REALTIME
224# define EV_USE_REALTIME 0
225#endif
226
227#if !EV_STAT_ENABLE
228# undef EV_USE_INOTIFY
229# define EV_USE_INOTIFY 0
230#endif
231
232#if !EV_USE_NANOSLEEP
233# ifndef _WIN32
234# include <sys/select.h>
235# endif
236#endif
237
238#if EV_USE_INOTIFY
239# include <sys/inotify.h>
240#endif
241
242#if EV_SELECT_IS_WINSOCKET
243# include <winsock.h>
244#endif
245
246/**/
247
248/*
249 * This is used to avoid floating point rounding problems.
250 * It is added to ev_rt_now when scheduling periodics
251 * to ensure progress, time-wise, even when rounding
252 * errors are against us.
253 * This value is good at least till the year 4000.
254 * Better solutions welcome.
255 */
256#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
63 257
64#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 258#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65#define MAX_BLOCKTIME 60. 259#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
66#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */ 260/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
67 261
68#include "ev.h" 262#if __GNUC__ >= 4
263# define expect(expr,value) __builtin_expect ((expr),(value))
264# define noinline __attribute__ ((noinline))
265#else
266# define expect(expr,value) (expr)
267# define noinline
268# if __STDC_VERSION__ < 199901L
269# define inline
270# endif
271#endif
69 272
273#define expect_false(expr) expect ((expr) != 0, 0)
274#define expect_true(expr) expect ((expr) != 0, 1)
275#define inline_size static inline
276
277#if EV_MINIMAL
278# define inline_speed static noinline
279#else
280# define inline_speed static inline
281#endif
282
283#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
284#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
285
286#define EMPTY /* required for microsofts broken pseudo-c compiler */
287#define EMPTY2(a,b) /* used to suppress some warnings */
288
70typedef struct ev_watcher *W; 289typedef ev_watcher *W;
71typedef struct ev_watcher_list *WL; 290typedef ev_watcher_list *WL;
72typedef struct ev_watcher_time *WT; 291typedef ev_watcher_time *WT;
73 292
74static ev_tstamp now, diff; /* monotonic clock */ 293#if EV_USE_MONOTONIC
294/* sig_atomic_t is used to avoid per-thread variables or locking but still */
295/* giving it a reasonably high chance of working on typical architetcures */
296static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
297#endif
298
299#ifdef _WIN32
300# include "ev_win32.c"
301#endif
302
303/*****************************************************************************/
304
305static void (*syserr_cb)(const char *msg);
306
307void
308ev_set_syserr_cb (void (*cb)(const char *msg))
309{
310 syserr_cb = cb;
311}
312
313static void noinline
314syserr (const char *msg)
315{
316 if (!msg)
317 msg = "(libev) system error";
318
319 if (syserr_cb)
320 syserr_cb (msg);
321 else
322 {
323 perror (msg);
324 abort ();
325 }
326}
327
328static void *(*alloc)(void *ptr, long size);
329
330void
331ev_set_allocator (void *(*cb)(void *ptr, long size))
332{
333 alloc = cb;
334}
335
336inline_speed void *
337ev_realloc (void *ptr, long size)
338{
339 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
340
341 if (!ptr && size)
342 {
343 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
344 abort ();
345 }
346
347 return ptr;
348}
349
350#define ev_malloc(size) ev_realloc (0, (size))
351#define ev_free(ptr) ev_realloc ((ptr), 0)
352
353/*****************************************************************************/
354
355typedef struct
356{
357 WL head;
358 unsigned char events;
359 unsigned char reify;
360#if EV_SELECT_IS_WINSOCKET
361 SOCKET handle;
362#endif
363} ANFD;
364
365typedef struct
366{
367 W w;
368 int events;
369} ANPENDING;
370
371#if EV_USE_INOTIFY
372typedef struct
373{
374 WL head;
375} ANFS;
376#endif
377
378#if EV_MULTIPLICITY
379
380 struct ev_loop
381 {
382 ev_tstamp ev_rt_now;
383 #define ev_rt_now ((loop)->ev_rt_now)
384 #define VAR(name,decl) decl;
385 #include "ev_vars.h"
386 #undef VAR
387 };
388 #include "ev_wrap.h"
389
390 static struct ev_loop default_loop_struct;
391 struct ev_loop *ev_default_loop_ptr;
392
393#else
394
75ev_tstamp ev_now; 395 ev_tstamp ev_rt_now;
76int ev_method; 396 #define VAR(name,decl) static decl;
397 #include "ev_vars.h"
398 #undef VAR
77 399
78static int have_monotonic; /* runtime */ 400 static int ev_default_loop_ptr;
79 401
80static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 402#endif
81static void (*method_modify)(int fd, int oev, int nev);
82static void (*method_poll)(ev_tstamp timeout);
83 403
84/*****************************************************************************/ 404/*****************************************************************************/
85 405
86ev_tstamp 406ev_tstamp
87ev_time (void) 407ev_time (void)
88{ 408{
89#if HAVE_REALTIME 409#if EV_USE_REALTIME
90 struct timespec ts; 410 struct timespec ts;
91 clock_gettime (CLOCK_REALTIME, &ts); 411 clock_gettime (CLOCK_REALTIME, &ts);
92 return ts.tv_sec + ts.tv_nsec * 1e-9; 412 return ts.tv_sec + ts.tv_nsec * 1e-9;
93#else 413#else
94 struct timeval tv; 414 struct timeval tv;
95 gettimeofday (&tv, 0); 415 gettimeofday (&tv, 0);
96 return tv.tv_sec + tv.tv_usec * 1e-6; 416 return tv.tv_sec + tv.tv_usec * 1e-6;
97#endif 417#endif
98} 418}
99 419
100static ev_tstamp 420ev_tstamp inline_size
101get_clock (void) 421get_clock (void)
102{ 422{
103#if HAVE_MONOTONIC 423#if EV_USE_MONOTONIC
104 if (have_monotonic) 424 if (expect_true (have_monotonic))
105 { 425 {
106 struct timespec ts; 426 struct timespec ts;
107 clock_gettime (CLOCK_MONOTONIC, &ts); 427 clock_gettime (CLOCK_MONOTONIC, &ts);
108 return ts.tv_sec + ts.tv_nsec * 1e-9; 428 return ts.tv_sec + ts.tv_nsec * 1e-9;
109 } 429 }
110#endif 430#endif
111 431
112 return ev_time (); 432 return ev_time ();
113} 433}
114 434
115#define array_needsize(base,cur,cnt,init) \ 435#if EV_MULTIPLICITY
116 if ((cnt) > cur) \ 436ev_tstamp
117 { \ 437ev_now (EV_P)
118 int newcnt = cur ? cur << 1 : 16; \ 438{
119 base = realloc (base, sizeof (*base) * (newcnt)); \ 439 return ev_rt_now;
120 init (base + cur, newcnt - cur); \ 440}
121 cur = newcnt; \ 441#endif
442
443void
444ev_sleep (ev_tstamp delay)
445{
446 if (delay > 0.)
122 } 447 {
448#if EV_USE_NANOSLEEP
449 struct timespec ts;
450
451 ts.tv_sec = (time_t)delay;
452 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
453
454 nanosleep (&ts, 0);
455#elif defined(_WIN32)
456 Sleep (delay * 1e3);
457#else
458 struct timeval tv;
459
460 tv.tv_sec = (time_t)delay;
461 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
462
463 select (0, 0, 0, 0, &tv);
464#endif
465 }
466}
123 467
124/*****************************************************************************/ 468/*****************************************************************************/
125 469
470int inline_size
471array_nextsize (int elem, int cur, int cnt)
472{
473 int ncur = cur + 1;
474
475 do
476 ncur <<= 1;
477 while (cnt > ncur);
478
479 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
480 if (elem * ncur > 4096)
481 {
482 ncur *= elem;
483 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
484 ncur = ncur - sizeof (void *) * 4;
485 ncur /= elem;
486 }
487
488 return ncur;
489}
490
491static noinline void *
492array_realloc (int elem, void *base, int *cur, int cnt)
493{
494 *cur = array_nextsize (elem, *cur, cnt);
495 return ev_realloc (base, elem * *cur);
496}
497
498#define array_needsize(type,base,cur,cnt,init) \
499 if (expect_false ((cnt) > (cur))) \
500 { \
501 int ocur_ = (cur); \
502 (base) = (type *)array_realloc \
503 (sizeof (type), (base), &(cur), (cnt)); \
504 init ((base) + (ocur_), (cur) - ocur_); \
505 }
506
507#if 0
508#define array_slim(type,stem) \
509 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
510 { \
511 stem ## max = array_roundsize (stem ## cnt >> 1); \
512 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
513 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
514 }
515#endif
516
517#define array_free(stem, idx) \
518 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
519
520/*****************************************************************************/
521
522void noinline
523ev_feed_event (EV_P_ void *w, int revents)
524{
525 W w_ = (W)w;
526 int pri = ABSPRI (w_);
527
528 if (expect_false (w_->pending))
529 pendings [pri][w_->pending - 1].events |= revents;
530 else
531 {
532 w_->pending = ++pendingcnt [pri];
533 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
534 pendings [pri][w_->pending - 1].w = w_;
535 pendings [pri][w_->pending - 1].events = revents;
536 }
537}
538
539void inline_speed
540queue_events (EV_P_ W *events, int eventcnt, int type)
541{
542 int i;
543
544 for (i = 0; i < eventcnt; ++i)
545 ev_feed_event (EV_A_ events [i], type);
546}
547
548/*****************************************************************************/
549
550void inline_size
551anfds_init (ANFD *base, int count)
552{
553 while (count--)
554 {
555 base->head = 0;
556 base->events = EV_NONE;
557 base->reify = 0;
558
559 ++base;
560 }
561}
562
563void inline_speed
564fd_event (EV_P_ int fd, int revents)
565{
566 ANFD *anfd = anfds + fd;
567 ev_io *w;
568
569 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
570 {
571 int ev = w->events & revents;
572
573 if (ev)
574 ev_feed_event (EV_A_ (W)w, ev);
575 }
576}
577
578void
579ev_feed_fd_event (EV_P_ int fd, int revents)
580{
581 if (fd >= 0 && fd < anfdmax)
582 fd_event (EV_A_ fd, revents);
583}
584
585void inline_size
586fd_reify (EV_P)
587{
588 int i;
589
590 for (i = 0; i < fdchangecnt; ++i)
591 {
592 int fd = fdchanges [i];
593 ANFD *anfd = anfds + fd;
594 ev_io *w;
595
596 unsigned char events = 0;
597
598 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
599 events |= (unsigned char)w->events;
600
601#if EV_SELECT_IS_WINSOCKET
602 if (events)
603 {
604 unsigned long argp;
605 #ifdef EV_FD_TO_WIN32_HANDLE
606 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
607 #else
608 anfd->handle = _get_osfhandle (fd);
609 #endif
610 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
611 }
612#endif
613
614 {
615 unsigned char o_events = anfd->events;
616 unsigned char o_reify = anfd->reify;
617
618 anfd->reify = 0;
619 anfd->events = events;
620
621 if (o_events != events || o_reify & EV_IOFDSET)
622 backend_modify (EV_A_ fd, o_events, events);
623 }
624 }
625
626 fdchangecnt = 0;
627}
628
629void inline_size
630fd_change (EV_P_ int fd, int flags)
631{
632 unsigned char reify = anfds [fd].reify;
633 anfds [fd].reify |= flags;
634
635 if (expect_true (!reify))
636 {
637 ++fdchangecnt;
638 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
639 fdchanges [fdchangecnt - 1] = fd;
640 }
641}
642
643void inline_speed
644fd_kill (EV_P_ int fd)
645{
646 ev_io *w;
647
648 while ((w = (ev_io *)anfds [fd].head))
649 {
650 ev_io_stop (EV_A_ w);
651 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
652 }
653}
654
655int inline_size
656fd_valid (int fd)
657{
658#ifdef _WIN32
659 return _get_osfhandle (fd) != -1;
660#else
661 return fcntl (fd, F_GETFD) != -1;
662#endif
663}
664
665/* called on EBADF to verify fds */
666static void noinline
667fd_ebadf (EV_P)
668{
669 int fd;
670
671 for (fd = 0; fd < anfdmax; ++fd)
672 if (anfds [fd].events)
673 if (!fd_valid (fd) == -1 && errno == EBADF)
674 fd_kill (EV_A_ fd);
675}
676
677/* called on ENOMEM in select/poll to kill some fds and retry */
678static void noinline
679fd_enomem (EV_P)
680{
681 int fd;
682
683 for (fd = anfdmax; fd--; )
684 if (anfds [fd].events)
685 {
686 fd_kill (EV_A_ fd);
687 return;
688 }
689}
690
691/* usually called after fork if backend needs to re-arm all fds from scratch */
692static void noinline
693fd_rearm_all (EV_P)
694{
695 int fd;
696
697 for (fd = 0; fd < anfdmax; ++fd)
698 if (anfds [fd].events)
699 {
700 anfds [fd].events = 0;
701 fd_change (EV_A_ fd, EV_IOFDSET | 1);
702 }
703}
704
705/*****************************************************************************/
706
707void inline_speed
708upheap (WT *heap, int k)
709{
710 WT w = heap [k];
711
712 while (k)
713 {
714 int p = (k - 1) >> 1;
715
716 if (heap [p]->at <= w->at)
717 break;
718
719 heap [k] = heap [p];
720 ((W)heap [k])->active = k + 1;
721 k = p;
722 }
723
724 heap [k] = w;
725 ((W)heap [k])->active = k + 1;
726}
727
728void inline_speed
729downheap (WT *heap, int N, int k)
730{
731 WT w = heap [k];
732
733 for (;;)
734 {
735 int c = (k << 1) + 1;
736
737 if (c >= N)
738 break;
739
740 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
741 ? 1 : 0;
742
743 if (w->at <= heap [c]->at)
744 break;
745
746 heap [k] = heap [c];
747 ((W)heap [k])->active = k + 1;
748
749 k = c;
750 }
751
752 heap [k] = w;
753 ((W)heap [k])->active = k + 1;
754}
755
756void inline_size
757adjustheap (WT *heap, int N, int k)
758{
759 upheap (heap, k);
760 downheap (heap, N, k);
761}
762
763/*****************************************************************************/
764
126typedef struct 765typedef struct
127{ 766{
128 struct ev_io *head; 767 WL head;
129 unsigned char wev, rev; /* want, received event set */ 768 EV_ATOMIC_T gotsig;
130} ANFD;
131
132static ANFD *anfds;
133static int anfdmax;
134
135static int *fdchanges;
136static int fdchangemax, fdchangecnt;
137
138static void
139anfds_init (ANFD *base, int count)
140{
141 while (count--)
142 {
143 base->head = 0;
144 base->wev = base->rev = EV_NONE;
145 ++base;
146 }
147}
148
149typedef struct
150{
151 W w;
152 int events;
153} ANPENDING;
154
155static ANPENDING *pendings;
156static int pendingmax, pendingcnt;
157
158static void
159event (W w, int events)
160{
161 if (w->active)
162 {
163 w->pending = ++pendingcnt;
164 array_needsize (pendings, pendingmax, pendingcnt, );
165 pendings [pendingcnt - 1].w = w;
166 pendings [pendingcnt - 1].events = events;
167 }
168}
169
170static void
171fd_event (int fd, int events)
172{
173 ANFD *anfd = anfds + fd;
174 struct ev_io *w;
175
176 for (w = anfd->head; w; w = w->next)
177 {
178 int ev = w->events & events;
179
180 if (ev)
181 event ((W)w, ev);
182 }
183}
184
185static void
186queue_events (W *events, int eventcnt, int type)
187{
188 int i;
189
190 for (i = 0; i < eventcnt; ++i)
191 event (events [i], type);
192}
193
194/* called on EBADF to verify fds */
195static void
196fd_recheck ()
197{
198 int fd;
199
200 for (fd = 0; fd < anfdmax; ++fd)
201 if (anfds [fd].wev)
202 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
203 while (anfds [fd].head)
204 evio_stop (anfds [fd].head);
205}
206
207/*****************************************************************************/
208
209static struct ev_timer **timers;
210static int timermax, timercnt;
211
212static struct ev_periodic **periodics;
213static int periodicmax, periodiccnt;
214
215static void
216upheap (WT *timers, int k)
217{
218 WT w = timers [k];
219
220 while (k && timers [k >> 1]->at > w->at)
221 {
222 timers [k] = timers [k >> 1];
223 timers [k]->active = k + 1;
224 k >>= 1;
225 }
226
227 timers [k] = w;
228 timers [k]->active = k + 1;
229
230}
231
232static void
233downheap (WT *timers, int N, int k)
234{
235 WT w = timers [k];
236
237 while (k < (N >> 1))
238 {
239 int j = k << 1;
240
241 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
242 ++j;
243
244 if (w->at <= timers [j]->at)
245 break;
246
247 timers [k] = timers [j];
248 timers [k]->active = k + 1;
249 k = j;
250 }
251
252 timers [k] = w;
253 timers [k]->active = k + 1;
254}
255
256/*****************************************************************************/
257
258typedef struct
259{
260 struct ev_signal *head;
261 sig_atomic_t gotsig;
262} ANSIG; 769} ANSIG;
263 770
264static ANSIG *signals; 771static ANSIG *signals;
265static int signalmax; 772static int signalmax;
266 773
267static int sigpipe [2]; 774static EV_ATOMIC_T gotsig;
268static sig_atomic_t gotsig;
269static struct ev_io sigev;
270 775
271static void 776void inline_size
272signals_init (ANSIG *base, int count) 777signals_init (ANSIG *base, int count)
273{ 778{
274 while (count--) 779 while (count--)
275 { 780 {
276 base->head = 0; 781 base->head = 0;
277 base->gotsig = 0; 782 base->gotsig = 0;
783
278 ++base; 784 ++base;
279 } 785 }
280} 786}
787
788/*****************************************************************************/
789
790void inline_speed
791fd_intern (int fd)
792{
793#ifdef _WIN32
794 int arg = 1;
795 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
796#else
797 fcntl (fd, F_SETFD, FD_CLOEXEC);
798 fcntl (fd, F_SETFL, O_NONBLOCK);
799#endif
800}
801
802static void noinline
803evpipe_init (EV_P)
804{
805 if (!ev_is_active (&pipeev))
806 {
807 while (pipe (evpipe))
808 syserr ("(libev) error creating signal/async pipe");
809
810 fd_intern (evpipe [0]);
811 fd_intern (evpipe [1]);
812
813 ev_io_set (&pipeev, evpipe [0], EV_READ);
814 ev_io_start (EV_A_ &pipeev);
815 ev_unref (EV_A); /* child watcher should not keep loop alive */
816 }
817}
818
819void inline_size
820evpipe_write (EV_P_ int sig, int async)
821{
822 if (!(gotasync || gotsig))
823 {
824 int old_errno = errno;
825
826 if (sig) gotsig = 1;
827 if (async) gotasync = 1;
828
829 write (evpipe [1], &old_errno, 1);
830 errno = old_errno;
831 }
832}
833
834static void
835pipecb (EV_P_ ev_io *iow, int revents)
836{
837 {
838 int dummy;
839 read (evpipe [0], &dummy, 1);
840 }
841
842 if (gotsig)
843 {
844 int signum;
845 gotsig = 0;
846
847 for (signum = signalmax; signum--; )
848 if (signals [signum].gotsig)
849 ev_feed_signal_event (EV_A_ signum + 1);
850 }
851
852 if (gotasync)
853 {
854 int i;
855 gotasync = 0;
856
857 for (i = asynccnt; i--; )
858 if (asyncs [i]->sent)
859 {
860 asyncs [i]->sent = 0;
861 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
862 }
863 }
864}
865
866/*****************************************************************************/
281 867
282static void 868static void
283sighandler (int signum) 869sighandler (int signum)
284{ 870{
871#if EV_MULTIPLICITY
872 struct ev_loop *loop = &default_loop_struct;
873#endif
874
875#if _WIN32
876 signal (signum, sighandler);
877#endif
878
285 signals [signum - 1].gotsig = 1; 879 signals [signum - 1].gotsig = 1;
286 880 evpipe_write (EV_A_ 1, 0);
287 if (!gotsig)
288 {
289 gotsig = 1;
290 write (sigpipe [1], &gotsig, 1);
291 }
292} 881}
293 882
294static void 883void noinline
295sigcb (struct ev_io *iow, int revents) 884ev_feed_signal_event (EV_P_ int signum)
296{ 885{
297 struct ev_signal *w; 886 WL w;
298 int sig;
299 887
300 gotsig = 0; 888#if EV_MULTIPLICITY
301 read (sigpipe [0], &revents, 1); 889 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
890#endif
302 891
303 for (sig = signalmax; sig--; ) 892 --signum;
304 if (signals [sig].gotsig) 893
305 { 894 if (signum < 0 || signum >= signalmax)
895 return;
896
306 signals [sig].gotsig = 0; 897 signals [signum].gotsig = 0;
307 898
308 for (w = signals [sig].head; w; w = w->next) 899 for (w = signals [signum].head; w; w = w->next)
309 event ((W)w, EV_SIGNAL); 900 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
310 }
311}
312
313static void
314siginit (void)
315{
316 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
317 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
318
319 /* rather than sort out wether we really need nb, set it */
320 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
321 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
322
323 evio_set (&sigev, sigpipe [0], EV_READ);
324 evio_start (&sigev);
325} 901}
326 902
327/*****************************************************************************/ 903/*****************************************************************************/
328 904
329static struct ev_idle **idles; 905static WL childs [EV_PID_HASHSIZE];
330static int idlemax, idlecnt;
331 906
332static struct ev_prepare **prepares; 907#ifndef _WIN32
333static int preparemax, preparecnt;
334 908
335static struct ev_check **checks;
336static int checkmax, checkcnt;
337
338/*****************************************************************************/
339
340static struct ev_child *childs [PID_HASHSIZE];
341static struct ev_signal childev; 909static ev_signal childev;
910
911#ifndef WIFCONTINUED
912# define WIFCONTINUED(status) 0
913#endif
914
915void inline_speed
916child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
917{
918 ev_child *w;
919 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
920
921 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
922 {
923 if ((w->pid == pid || !w->pid)
924 && (!traced || (w->flags & 1)))
925 {
926 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
927 w->rpid = pid;
928 w->rstatus = status;
929 ev_feed_event (EV_A_ (W)w, EV_CHILD);
930 }
931 }
932}
342 933
343#ifndef WCONTINUED 934#ifndef WCONTINUED
344# define WCONTINUED 0 935# define WCONTINUED 0
345#endif 936#endif
346 937
347static void 938static void
348childcb (struct ev_signal *sw, int revents) 939childcb (EV_P_ ev_signal *sw, int revents)
349{ 940{
350 struct ev_child *w;
351 int pid, status; 941 int pid, status;
352 942
943 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
353 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 944 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
354 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 945 if (!WCONTINUED
355 if (w->pid == pid || w->pid == -1) 946 || errno != EINVAL
947 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
948 return;
949
950 /* make sure we are called again until all childs have been reaped */
951 /* we need to do it this way so that the callback gets called before we continue */
952 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
953
954 child_reap (EV_A_ sw, pid, pid, status);
955 if (EV_PID_HASHSIZE > 1)
956 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
957}
958
959#endif
960
961/*****************************************************************************/
962
963#if EV_USE_PORT
964# include "ev_port.c"
965#endif
966#if EV_USE_KQUEUE
967# include "ev_kqueue.c"
968#endif
969#if EV_USE_EPOLL
970# include "ev_epoll.c"
971#endif
972#if EV_USE_POLL
973# include "ev_poll.c"
974#endif
975#if EV_USE_SELECT
976# include "ev_select.c"
977#endif
978
979int
980ev_version_major (void)
981{
982 return EV_VERSION_MAJOR;
983}
984
985int
986ev_version_minor (void)
987{
988 return EV_VERSION_MINOR;
989}
990
991/* return true if we are running with elevated privileges and should ignore env variables */
992int inline_size
993enable_secure (void)
994{
995#ifdef _WIN32
996 return 0;
997#else
998 return getuid () != geteuid ()
999 || getgid () != getegid ();
1000#endif
1001}
1002
1003unsigned int
1004ev_supported_backends (void)
1005{
1006 unsigned int flags = 0;
1007
1008 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1009 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1010 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1011 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1012 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1013
1014 return flags;
1015}
1016
1017unsigned int
1018ev_recommended_backends (void)
1019{
1020 unsigned int flags = ev_supported_backends ();
1021
1022#ifndef __NetBSD__
1023 /* kqueue is borked on everything but netbsd apparently */
1024 /* it usually doesn't work correctly on anything but sockets and pipes */
1025 flags &= ~EVBACKEND_KQUEUE;
1026#endif
1027#ifdef __APPLE__
1028 // flags &= ~EVBACKEND_KQUEUE; for documentation
1029 flags &= ~EVBACKEND_POLL;
1030#endif
1031
1032 return flags;
1033}
1034
1035unsigned int
1036ev_embeddable_backends (void)
1037{
1038 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1039
1040 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1041 /* please fix it and tell me how to detect the fix */
1042 flags &= ~EVBACKEND_EPOLL;
1043
1044 return flags;
1045}
1046
1047unsigned int
1048ev_backend (EV_P)
1049{
1050 return backend;
1051}
1052
1053unsigned int
1054ev_loop_count (EV_P)
1055{
1056 return loop_count;
1057}
1058
1059void
1060ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1061{
1062 io_blocktime = interval;
1063}
1064
1065void
1066ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1067{
1068 timeout_blocktime = interval;
1069}
1070
1071static void noinline
1072loop_init (EV_P_ unsigned int flags)
1073{
1074 if (!backend)
1075 {
1076#if EV_USE_MONOTONIC
1077 {
1078 struct timespec ts;
1079 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1080 have_monotonic = 1;
1081 }
1082#endif
1083
1084 ev_rt_now = ev_time ();
1085 mn_now = get_clock ();
1086 now_floor = mn_now;
1087 rtmn_diff = ev_rt_now - mn_now;
1088
1089 io_blocktime = 0.;
1090 timeout_blocktime = 0.;
1091
1092 /* pid check not overridable via env */
1093#ifndef _WIN32
1094 if (flags & EVFLAG_FORKCHECK)
1095 curpid = getpid ();
1096#endif
1097
1098 if (!(flags & EVFLAG_NOENV)
1099 && !enable_secure ()
1100 && getenv ("LIBEV_FLAGS"))
1101 flags = atoi (getenv ("LIBEV_FLAGS"));
1102
1103 if (!(flags & 0x0000ffffUL))
1104 flags |= ev_recommended_backends ();
1105
1106 backend = 0;
1107 backend_fd = -1;
1108#if EV_USE_INOTIFY
1109 fs_fd = -2;
1110#endif
1111
1112#if EV_USE_PORT
1113 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1114#endif
1115#if EV_USE_KQUEUE
1116 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1117#endif
1118#if EV_USE_EPOLL
1119 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1120#endif
1121#if EV_USE_POLL
1122 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1123#endif
1124#if EV_USE_SELECT
1125 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1126#endif
1127
1128 ev_init (&pipeev, pipecb);
1129 ev_set_priority (&pipeev, EV_MAXPRI);
1130 }
1131}
1132
1133static void noinline
1134loop_destroy (EV_P)
1135{
1136 int i;
1137
1138 if (ev_is_active (&pipeev))
1139 {
1140 ev_ref (EV_A); /* signal watcher */
1141 ev_io_stop (EV_A_ &pipeev);
1142
1143 close (evpipe [0]); evpipe [0] = 0;
1144 close (evpipe [1]); evpipe [1] = 0;
1145 }
1146
1147#if EV_USE_INOTIFY
1148 if (fs_fd >= 0)
1149 close (fs_fd);
1150#endif
1151
1152 if (backend_fd >= 0)
1153 close (backend_fd);
1154
1155#if EV_USE_PORT
1156 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1157#endif
1158#if EV_USE_KQUEUE
1159 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1160#endif
1161#if EV_USE_EPOLL
1162 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1163#endif
1164#if EV_USE_POLL
1165 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1166#endif
1167#if EV_USE_SELECT
1168 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1169#endif
1170
1171 for (i = NUMPRI; i--; )
1172 {
1173 array_free (pending, [i]);
1174#if EV_IDLE_ENABLE
1175 array_free (idle, [i]);
1176#endif
1177 }
1178
1179 ev_free (anfds); anfdmax = 0;
1180
1181 /* have to use the microsoft-never-gets-it-right macro */
1182 array_free (fdchange, EMPTY);
1183 array_free (timer, EMPTY);
1184#if EV_PERIODIC_ENABLE
1185 array_free (periodic, EMPTY);
1186#endif
1187#if EV_FORK_ENABLE
1188 array_free (fork, EMPTY);
1189#endif
1190 array_free (prepare, EMPTY);
1191 array_free (check, EMPTY);
1192
1193 backend = 0;
1194}
1195
1196void inline_size infy_fork (EV_P);
1197
1198void inline_size
1199loop_fork (EV_P)
1200{
1201#if EV_USE_PORT
1202 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1203#endif
1204#if EV_USE_KQUEUE
1205 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1206#endif
1207#if EV_USE_EPOLL
1208 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1209#endif
1210#if EV_USE_INOTIFY
1211 infy_fork (EV_A);
1212#endif
1213
1214 if (ev_is_active (&pipeev))
1215 {
1216 /* this "locks" the handlers against writing to the pipe */
1217 gotsig = gotasync = 1;
1218
1219 ev_ref (EV_A);
1220 ev_io_stop (EV_A_ &pipeev);
1221 close (evpipe [0]);
1222 close (evpipe [1]);
1223
1224 evpipe_init (EV_A);
1225 /* now iterate over everything, in case we missed something */
1226 pipecb (EV_A_ &pipeev, EV_READ);
1227 }
1228
1229 postfork = 0;
1230}
1231
1232#if EV_MULTIPLICITY
1233struct ev_loop *
1234ev_loop_new (unsigned int flags)
1235{
1236 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1237
1238 memset (loop, 0, sizeof (struct ev_loop));
1239
1240 loop_init (EV_A_ flags);
1241
1242 if (ev_backend (EV_A))
1243 return loop;
1244
1245 return 0;
1246}
1247
1248void
1249ev_loop_destroy (EV_P)
1250{
1251 loop_destroy (EV_A);
1252 ev_free (loop);
1253}
1254
1255void
1256ev_loop_fork (EV_P)
1257{
1258 postfork = 1; /* must be in line with ev_default_fork */
1259}
1260
1261#endif
1262
1263#if EV_MULTIPLICITY
1264struct ev_loop *
1265ev_default_loop_init (unsigned int flags)
1266#else
1267int
1268ev_default_loop (unsigned int flags)
1269#endif
1270{
1271 if (!ev_default_loop_ptr)
1272 {
1273#if EV_MULTIPLICITY
1274 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1275#else
1276 ev_default_loop_ptr = 1;
1277#endif
1278
1279 loop_init (EV_A_ flags);
1280
1281 if (ev_backend (EV_A))
356 { 1282 {
357 w->status = status; 1283#ifndef _WIN32
358 event ((W)w, EV_CHILD); 1284 ev_signal_init (&childev, childcb, SIGCHLD);
1285 ev_set_priority (&childev, EV_MAXPRI);
1286 ev_signal_start (EV_A_ &childev);
1287 ev_unref (EV_A); /* child watcher should not keep loop alive */
1288#endif
359 } 1289 }
1290 else
1291 ev_default_loop_ptr = 0;
1292 }
1293
1294 return ev_default_loop_ptr;
1295}
1296
1297void
1298ev_default_destroy (void)
1299{
1300#if EV_MULTIPLICITY
1301 struct ev_loop *loop = ev_default_loop_ptr;
1302#endif
1303
1304#ifndef _WIN32
1305 ev_ref (EV_A); /* child watcher */
1306 ev_signal_stop (EV_A_ &childev);
1307#endif
1308
1309 loop_destroy (EV_A);
1310}
1311
1312void
1313ev_default_fork (void)
1314{
1315#if EV_MULTIPLICITY
1316 struct ev_loop *loop = ev_default_loop_ptr;
1317#endif
1318
1319 if (backend)
1320 postfork = 1; /* must be in line with ev_loop_fork */
360} 1321}
361 1322
362/*****************************************************************************/ 1323/*****************************************************************************/
363 1324
364#if HAVE_EPOLL 1325void
365# include "ev_epoll.c" 1326ev_invoke (EV_P_ void *w, int revents)
366#endif
367#if HAVE_SELECT
368# include "ev_select.c"
369#endif
370
371int ev_init (int flags)
372{ 1327{
373#if HAVE_MONOTONIC 1328 EV_CB_INVOKE ((W)w, revents);
374 {
375 struct timespec ts;
376 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
377 have_monotonic = 1;
378 }
379#endif
380
381 ev_now = ev_time ();
382 now = get_clock ();
383 diff = ev_now - now;
384
385 if (pipe (sigpipe))
386 return 0;
387
388 ev_method = EVMETHOD_NONE;
389#if HAVE_EPOLL
390 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
391#endif
392#if HAVE_SELECT
393 if (ev_method == EVMETHOD_NONE) select_init (flags);
394#endif
395
396 if (ev_method)
397 {
398 evw_init (&sigev, sigcb);
399 siginit ();
400
401 evsignal_init (&childev, childcb, SIGCHLD);
402 evsignal_start (&childev);
403 }
404
405 return ev_method;
406} 1329}
407 1330
408/*****************************************************************************/ 1331void inline_speed
409 1332call_pending (EV_P)
410void ev_prefork (void)
411{ 1333{
412 /* nop */
413}
414
415void ev_postfork_parent (void)
416{
417 /* nop */
418}
419
420void ev_postfork_child (void)
421{
422#if HAVE_EPOLL
423 if (ev_method == EVMETHOD_EPOLL)
424 epoll_postfork_child ();
425#endif
426
427 evio_stop (&sigev);
428 close (sigpipe [0]);
429 close (sigpipe [1]);
430 pipe (sigpipe);
431 siginit ();
432}
433
434/*****************************************************************************/
435
436static void
437fd_reify (void)
438{
439 int i; 1334 int pri;
440 1335
441 for (i = 0; i < fdchangecnt; ++i) 1336 for (pri = NUMPRI; pri--; )
1337 while (pendingcnt [pri])
442 { 1338 {
443 int fd = fdchanges [i]; 1339 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
444 ANFD *anfd = anfds + fd;
445 struct ev_io *w;
446 1340
447 int wev = 0; 1341 if (expect_true (p->w))
448
449 for (w = anfd->head; w; w = w->next)
450 wev |= w->events;
451
452 if (anfd->wev != wev)
453 { 1342 {
454 method_modify (fd, anfd->wev, wev); 1343 /*assert (("non-pending watcher on pending list", p->w->pending));*/
455 anfd->wev = wev;
456 }
457 }
458 1344
459 fdchangecnt = 0;
460}
461
462static void
463call_pending ()
464{
465 while (pendingcnt)
466 {
467 ANPENDING *p = pendings + --pendingcnt;
468
469 if (p->w)
470 {
471 p->w->pending = 0; 1345 p->w->pending = 0;
472 p->w->cb (p->w, p->events); 1346 EV_CB_INVOKE (p->w, p->events);
473 } 1347 }
474 } 1348 }
475} 1349}
476 1350
477static void 1351void inline_size
478timers_reify () 1352timers_reify (EV_P)
479{ 1353{
480 while (timercnt && timers [0]->at <= now) 1354 while (timercnt && ((WT)timers [0])->at <= mn_now)
481 { 1355 {
482 struct ev_timer *w = timers [0]; 1356 ev_timer *w = (ev_timer *)timers [0];
483 1357
484 event ((W)w, EV_TIMEOUT); 1358 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
485 1359
486 /* first reschedule or stop timer */ 1360 /* first reschedule or stop timer */
487 if (w->repeat) 1361 if (w->repeat)
488 { 1362 {
1363 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1364
489 w->at = now + w->repeat; 1365 ((WT)w)->at += w->repeat;
490 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1366 if (((WT)w)->at < mn_now)
1367 ((WT)w)->at = mn_now;
1368
491 downheap ((WT *)timers, timercnt, 0); 1369 downheap (timers, timercnt, 0);
492 } 1370 }
493 else 1371 else
494 evtimer_stop (w); /* nonrepeating: stop timer */ 1372 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
495 }
496}
497 1373
498static void 1374 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1375 }
1376}
1377
1378#if EV_PERIODIC_ENABLE
1379void inline_size
499periodics_reify () 1380periodics_reify (EV_P)
500{ 1381{
501 while (periodiccnt && periodics [0]->at <= ev_now) 1382 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
502 { 1383 {
503 struct ev_periodic *w = periodics [0]; 1384 ev_periodic *w = (ev_periodic *)periodics [0];
1385
1386 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
504 1387
505 /* first reschedule or stop timer */ 1388 /* first reschedule or stop timer */
506 if (w->interval) 1389 if (w->reschedule_cb)
507 { 1390 {
508 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1391 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
509 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1392 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
510 downheap ((WT *)periodics, periodiccnt, 0); 1393 downheap (periodics, periodiccnt, 0);
1394 }
1395 else if (w->interval)
1396 {
1397 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1398 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1399 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1400 downheap (periodics, periodiccnt, 0);
511 } 1401 }
512 else 1402 else
513 evperiodic_stop (w); /* nonrepeating: stop timer */ 1403 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
514 1404
515 event ((W)w, EV_TIMEOUT); 1405 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
516 } 1406 }
517} 1407}
518 1408
519static void 1409static void noinline
520periodics_reschedule (ev_tstamp diff) 1410periodics_reschedule (EV_P)
521{ 1411{
522 int i; 1412 int i;
523 1413
524 /* adjust periodics after time jump */ 1414 /* adjust periodics after time jump */
525 for (i = 0; i < periodiccnt; ++i) 1415 for (i = 0; i < periodiccnt; ++i)
526 { 1416 {
527 struct ev_periodic *w = periodics [i]; 1417 ev_periodic *w = (ev_periodic *)periodics [i];
528 1418
1419 if (w->reschedule_cb)
1420 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
529 if (w->interval) 1421 else if (w->interval)
1422 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1423 }
1424
1425 /* now rebuild the heap */
1426 for (i = periodiccnt >> 1; i--; )
1427 downheap (periodics, periodiccnt, i);
1428}
1429#endif
1430
1431#if EV_IDLE_ENABLE
1432void inline_size
1433idle_reify (EV_P)
1434{
1435 if (expect_false (idleall))
1436 {
1437 int pri;
1438
1439 for (pri = NUMPRI; pri--; )
530 { 1440 {
531 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1441 if (pendingcnt [pri])
1442 break;
532 1443
533 if (fabs (diff) >= 1e-4) 1444 if (idlecnt [pri])
534 { 1445 {
535 evperiodic_stop (w); 1446 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
536 evperiodic_start (w); 1447 break;
537
538 i = 0; /* restart loop, inefficient, but time jumps should be rare */
539 } 1448 }
540 } 1449 }
541 } 1450 }
542} 1451}
1452#endif
543 1453
544static void 1454void inline_speed
545time_update () 1455time_update (EV_P_ ev_tstamp max_block)
546{ 1456{
547 int i; 1457 int i;
548 1458
549 ev_now = ev_time (); 1459#if EV_USE_MONOTONIC
550
551 if (have_monotonic) 1460 if (expect_true (have_monotonic))
552 { 1461 {
553 ev_tstamp odiff = diff; 1462 ev_tstamp odiff = rtmn_diff;
554 1463
555 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1464 mn_now = get_clock ();
1465
1466 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1467 /* interpolate in the meantime */
1468 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
556 { 1469 {
557 now = get_clock (); 1470 ev_rt_now = rtmn_diff + mn_now;
1471 return;
1472 }
1473
1474 now_floor = mn_now;
1475 ev_rt_now = ev_time ();
1476
1477 /* loop a few times, before making important decisions.
1478 * on the choice of "4": one iteration isn't enough,
1479 * in case we get preempted during the calls to
1480 * ev_time and get_clock. a second call is almost guaranteed
1481 * to succeed in that case, though. and looping a few more times
1482 * doesn't hurt either as we only do this on time-jumps or
1483 * in the unlikely event of having been preempted here.
1484 */
1485 for (i = 4; --i; )
1486 {
558 diff = ev_now - now; 1487 rtmn_diff = ev_rt_now - mn_now;
559 1488
560 if (fabs (odiff - diff) < MIN_TIMEJUMP) 1489 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
561 return; /* all is well */ 1490 return; /* all is well */
562 1491
563 ev_now = ev_time (); 1492 ev_rt_now = ev_time ();
1493 mn_now = get_clock ();
1494 now_floor = mn_now;
564 } 1495 }
565 1496
1497# if EV_PERIODIC_ENABLE
566 periodics_reschedule (diff - odiff); 1498 periodics_reschedule (EV_A);
1499# endif
567 /* no timer adjustment, as the monotonic clock doesn't jump */ 1500 /* no timer adjustment, as the monotonic clock doesn't jump */
1501 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
568 } 1502 }
569 else 1503 else
1504#endif
570 { 1505 {
571 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 1506 ev_rt_now = ev_time ();
1507
1508 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
572 { 1509 {
1510#if EV_PERIODIC_ENABLE
573 periodics_reschedule (ev_now - now); 1511 periodics_reschedule (EV_A);
574 1512#endif
575 /* adjust timers. this is easy, as the offset is the same for all */ 1513 /* adjust timers. this is easy, as the offset is the same for all of them */
576 for (i = 0; i < timercnt; ++i) 1514 for (i = 0; i < timercnt; ++i)
577 timers [i]->at += diff; 1515 ((WT)timers [i])->at += ev_rt_now - mn_now;
578 } 1516 }
579 1517
580 now = ev_now; 1518 mn_now = ev_rt_now;
581 } 1519 }
582} 1520}
583 1521
584int ev_loop_done; 1522void
1523ev_ref (EV_P)
1524{
1525 ++activecnt;
1526}
585 1527
1528void
1529ev_unref (EV_P)
1530{
1531 --activecnt;
1532}
1533
1534static int loop_done;
1535
1536void
586void ev_loop (int flags) 1537ev_loop (EV_P_ int flags)
587{ 1538{
588 double block; 1539 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
589 ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0; 1540 ? EVUNLOOP_ONE
1541 : EVUNLOOP_CANCEL;
1542
1543 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
590 1544
591 do 1545 do
592 { 1546 {
1547#ifndef _WIN32
1548 if (expect_false (curpid)) /* penalise the forking check even more */
1549 if (expect_false (getpid () != curpid))
1550 {
1551 curpid = getpid ();
1552 postfork = 1;
1553 }
1554#endif
1555
1556#if EV_FORK_ENABLE
1557 /* we might have forked, so queue fork handlers */
1558 if (expect_false (postfork))
1559 if (forkcnt)
1560 {
1561 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1562 call_pending (EV_A);
1563 }
1564#endif
1565
593 /* queue check watchers (and execute them) */ 1566 /* queue prepare watchers (and execute them) */
594 if (preparecnt) 1567 if (expect_false (preparecnt))
595 { 1568 {
596 queue_events ((W *)prepares, preparecnt, EV_PREPARE); 1569 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
597 call_pending (); 1570 call_pending (EV_A);
598 } 1571 }
599 1572
1573 if (expect_false (!activecnt))
1574 break;
1575
1576 /* we might have forked, so reify kernel state if necessary */
1577 if (expect_false (postfork))
1578 loop_fork (EV_A);
1579
600 /* update fd-related kernel structures */ 1580 /* update fd-related kernel structures */
601 fd_reify (); 1581 fd_reify (EV_A);
602 1582
603 /* calculate blocking time */ 1583 /* calculate blocking time */
1584 {
1585 ev_tstamp waittime = 0.;
1586 ev_tstamp sleeptime = 0.;
604 1587
605 /* we only need this for !monotonic clockor timers, but as we basically 1588 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
606 always have timers, we just calculate it always */
607 ev_now = ev_time ();
608
609 if (flags & EVLOOP_NONBLOCK || idlecnt)
610 block = 0.;
611 else
612 { 1589 {
1590 /* update time to cancel out callback processing overhead */
1591 time_update (EV_A_ 1e100);
1592
613 block = MAX_BLOCKTIME; 1593 waittime = MAX_BLOCKTIME;
614 1594
615 if (timercnt) 1595 if (timercnt)
616 { 1596 {
617 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 1597 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
618 if (block > to) block = to; 1598 if (waittime > to) waittime = to;
619 } 1599 }
620 1600
1601#if EV_PERIODIC_ENABLE
621 if (periodiccnt) 1602 if (periodiccnt)
622 { 1603 {
623 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1604 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
624 if (block > to) block = to; 1605 if (waittime > to) waittime = to;
625 } 1606 }
1607#endif
626 1608
627 if (block < 0.) block = 0.; 1609 if (expect_false (waittime < timeout_blocktime))
1610 waittime = timeout_blocktime;
1611
1612 sleeptime = waittime - backend_fudge;
1613
1614 if (expect_true (sleeptime > io_blocktime))
1615 sleeptime = io_blocktime;
1616
1617 if (sleeptime)
1618 {
1619 ev_sleep (sleeptime);
1620 waittime -= sleeptime;
1621 }
628 } 1622 }
629 1623
630 method_poll (block); 1624 ++loop_count;
1625 backend_poll (EV_A_ waittime);
631 1626
632 /* update ev_now, do magic */ 1627 /* update ev_rt_now, do magic */
633 time_update (); 1628 time_update (EV_A_ waittime + sleeptime);
1629 }
634 1630
635 /* queue pending timers and reschedule them */ 1631 /* queue pending timers and reschedule them */
636 timers_reify (); /* relative timers called last */ 1632 timers_reify (EV_A); /* relative timers called last */
1633#if EV_PERIODIC_ENABLE
637 periodics_reify (); /* absolute timers called first */ 1634 periodics_reify (EV_A); /* absolute timers called first */
1635#endif
638 1636
1637#if EV_IDLE_ENABLE
639 /* queue idle watchers unless io or timers are pending */ 1638 /* queue idle watchers unless other events are pending */
640 if (!pendingcnt) 1639 idle_reify (EV_A);
641 queue_events ((W *)idles, idlecnt, EV_IDLE); 1640#endif
642 1641
643 /* queue check watchers, to be executed first */ 1642 /* queue check watchers, to be executed first */
644 if (checkcnt) 1643 if (expect_false (checkcnt))
645 queue_events ((W *)checks, checkcnt, EV_CHECK); 1644 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
646 1645
647 call_pending (); 1646 call_pending (EV_A);
648 }
649 while (!ev_loop_done);
650 1647
651 if (ev_loop_done != 2) 1648 }
1649 while (expect_true (activecnt && !loop_done));
1650
1651 if (loop_done == EVUNLOOP_ONE)
1652 loop_done = EVUNLOOP_CANCEL;
1653}
1654
1655void
1656ev_unloop (EV_P_ int how)
1657{
652 ev_loop_done = 0; 1658 loop_done = how;
653} 1659}
654 1660
655/*****************************************************************************/ 1661/*****************************************************************************/
656 1662
657static void 1663void inline_size
658wlist_add (WL *head, WL elem) 1664wlist_add (WL *head, WL elem)
659{ 1665{
660 elem->next = *head; 1666 elem->next = *head;
661 *head = elem; 1667 *head = elem;
662} 1668}
663 1669
664static void 1670void inline_size
665wlist_del (WL *head, WL elem) 1671wlist_del (WL *head, WL elem)
666{ 1672{
667 while (*head) 1673 while (*head)
668 { 1674 {
669 if (*head == elem) 1675 if (*head == elem)
… …
674 1680
675 head = &(*head)->next; 1681 head = &(*head)->next;
676 } 1682 }
677} 1683}
678 1684
679static void 1685void inline_speed
680ev_clear (W w) 1686clear_pending (EV_P_ W w)
681{ 1687{
682 if (w->pending) 1688 if (w->pending)
683 { 1689 {
684 pendings [w->pending - 1].w = 0; 1690 pendings [ABSPRI (w)][w->pending - 1].w = 0;
685 w->pending = 0; 1691 w->pending = 0;
686 } 1692 }
687} 1693}
688 1694
689static void 1695int
1696ev_clear_pending (EV_P_ void *w)
1697{
1698 W w_ = (W)w;
1699 int pending = w_->pending;
1700
1701 if (expect_true (pending))
1702 {
1703 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1704 w_->pending = 0;
1705 p->w = 0;
1706 return p->events;
1707 }
1708 else
1709 return 0;
1710}
1711
1712void inline_size
1713pri_adjust (EV_P_ W w)
1714{
1715 int pri = w->priority;
1716 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1717 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1718 w->priority = pri;
1719}
1720
1721void inline_speed
690ev_start (W w, int active) 1722ev_start (EV_P_ W w, int active)
691{ 1723{
1724 pri_adjust (EV_A_ w);
692 w->active = active; 1725 w->active = active;
1726 ev_ref (EV_A);
693} 1727}
694 1728
695static void 1729void inline_size
696ev_stop (W w) 1730ev_stop (EV_P_ W w)
697{ 1731{
1732 ev_unref (EV_A);
698 w->active = 0; 1733 w->active = 0;
699} 1734}
700 1735
701/*****************************************************************************/ 1736/*****************************************************************************/
702 1737
703void 1738void noinline
704evio_start (struct ev_io *w) 1739ev_io_start (EV_P_ ev_io *w)
705{ 1740{
706 if (ev_is_active (w))
707 return;
708
709 int fd = w->fd; 1741 int fd = w->fd;
710 1742
1743 if (expect_false (ev_is_active (w)))
1744 return;
1745
1746 assert (("ev_io_start called with negative fd", fd >= 0));
1747
711 ev_start ((W)w, 1); 1748 ev_start (EV_A_ (W)w, 1);
712 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1749 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
713 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1750 wlist_add (&anfds[fd].head, (WL)w);
714 1751
715 ++fdchangecnt; 1752 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
716 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1753 w->events &= ~EV_IOFDSET;
717 fdchanges [fdchangecnt - 1] = fd;
718} 1754}
719 1755
720void 1756void noinline
721evio_stop (struct ev_io *w) 1757ev_io_stop (EV_P_ ev_io *w)
722{ 1758{
723 ev_clear ((W)w); 1759 clear_pending (EV_A_ (W)w);
724 if (!ev_is_active (w)) 1760 if (expect_false (!ev_is_active (w)))
725 return; 1761 return;
726 1762
1763 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1764
727 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1765 wlist_del (&anfds[w->fd].head, (WL)w);
728 ev_stop ((W)w); 1766 ev_stop (EV_A_ (W)w);
729 1767
730 ++fdchangecnt; 1768 fd_change (EV_A_ w->fd, 1);
731 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
732 fdchanges [fdchangecnt - 1] = w->fd;
733} 1769}
734 1770
735void 1771void noinline
736evtimer_start (struct ev_timer *w) 1772ev_timer_start (EV_P_ ev_timer *w)
737{ 1773{
738 if (ev_is_active (w)) 1774 if (expect_false (ev_is_active (w)))
739 return; 1775 return;
740 1776
741 w->at += now; 1777 ((WT)w)->at += mn_now;
742 1778
743 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 1779 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
744 1780
745 ev_start ((W)w, ++timercnt); 1781 ev_start (EV_A_ (W)w, ++timercnt);
746 array_needsize (timers, timermax, timercnt, ); 1782 array_needsize (WT, timers, timermax, timercnt, EMPTY2);
747 timers [timercnt - 1] = w; 1783 timers [timercnt - 1] = (WT)w;
748 upheap ((WT *)timers, timercnt - 1); 1784 upheap (timers, timercnt - 1);
749}
750 1785
751void 1786 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
1787}
1788
1789void noinline
752evtimer_stop (struct ev_timer *w) 1790ev_timer_stop (EV_P_ ev_timer *w)
753{ 1791{
754 ev_clear ((W)w); 1792 clear_pending (EV_A_ (W)w);
755 if (!ev_is_active (w)) 1793 if (expect_false (!ev_is_active (w)))
756 return; 1794 return;
757 1795
758 if (w->active < timercnt--) 1796 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
1797
1798 {
1799 int active = ((W)w)->active;
1800
1801 if (expect_true (--active < --timercnt))
759 { 1802 {
760 timers [w->active - 1] = timers [timercnt]; 1803 timers [active] = timers [timercnt];
761 downheap ((WT *)timers, timercnt, w->active - 1); 1804 adjustheap (timers, timercnt, active);
762 } 1805 }
1806 }
763 1807
764 w->at = w->repeat; 1808 ((WT)w)->at -= mn_now;
765 1809
766 ev_stop ((W)w); 1810 ev_stop (EV_A_ (W)w);
767} 1811}
768 1812
769void 1813void noinline
770evtimer_again (struct ev_timer *w) 1814ev_timer_again (EV_P_ ev_timer *w)
771{ 1815{
772 if (ev_is_active (w)) 1816 if (ev_is_active (w))
773 { 1817 {
774 if (w->repeat) 1818 if (w->repeat)
775 { 1819 {
776 w->at = now + w->repeat; 1820 ((WT)w)->at = mn_now + w->repeat;
777 downheap ((WT *)timers, timercnt, w->active - 1); 1821 adjustheap (timers, timercnt, ((W)w)->active - 1);
778 } 1822 }
779 else 1823 else
780 evtimer_stop (w); 1824 ev_timer_stop (EV_A_ w);
781 } 1825 }
782 else if (w->repeat) 1826 else if (w->repeat)
1827 {
1828 w->at = w->repeat;
783 evtimer_start (w); 1829 ev_timer_start (EV_A_ w);
1830 }
784} 1831}
785 1832
786void 1833#if EV_PERIODIC_ENABLE
1834void noinline
787evperiodic_start (struct ev_periodic *w) 1835ev_periodic_start (EV_P_ ev_periodic *w)
788{ 1836{
789 if (ev_is_active (w)) 1837 if (expect_false (ev_is_active (w)))
790 return; 1838 return;
791 1839
792 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 1840 if (w->reschedule_cb)
793 1841 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1842 else if (w->interval)
1843 {
1844 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
794 /* this formula differs from the one in periodic_reify because we do not always round up */ 1845 /* this formula differs from the one in periodic_reify because we do not always round up */
795 if (w->interval)
796 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 1846 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1847 }
1848 else
1849 ((WT)w)->at = w->offset;
797 1850
798 ev_start ((W)w, ++periodiccnt); 1851 ev_start (EV_A_ (W)w, ++periodiccnt);
799 array_needsize (periodics, periodicmax, periodiccnt, ); 1852 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
800 periodics [periodiccnt - 1] = w; 1853 periodics [periodiccnt - 1] = (WT)w;
801 upheap ((WT *)periodics, periodiccnt - 1); 1854 upheap (periodics, periodiccnt - 1);
802}
803 1855
804void 1856 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
1857}
1858
1859void noinline
805evperiodic_stop (struct ev_periodic *w) 1860ev_periodic_stop (EV_P_ ev_periodic *w)
806{ 1861{
807 ev_clear ((W)w); 1862 clear_pending (EV_A_ (W)w);
808 if (!ev_is_active (w)) 1863 if (expect_false (!ev_is_active (w)))
809 return; 1864 return;
810 1865
811 if (w->active < periodiccnt--) 1866 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
1867
1868 {
1869 int active = ((W)w)->active;
1870
1871 if (expect_true (--active < --periodiccnt))
812 { 1872 {
813 periodics [w->active - 1] = periodics [periodiccnt]; 1873 periodics [active] = periodics [periodiccnt];
814 downheap ((WT *)periodics, periodiccnt, w->active - 1); 1874 adjustheap (periodics, periodiccnt, active);
815 } 1875 }
1876 }
816 1877
817 ev_stop ((W)w); 1878 ev_stop (EV_A_ (W)w);
818} 1879}
819 1880
820void 1881void noinline
1882ev_periodic_again (EV_P_ ev_periodic *w)
1883{
1884 /* TODO: use adjustheap and recalculation */
1885 ev_periodic_stop (EV_A_ w);
1886 ev_periodic_start (EV_A_ w);
1887}
1888#endif
1889
1890#ifndef SA_RESTART
1891# define SA_RESTART 0
1892#endif
1893
1894void noinline
821evsignal_start (struct ev_signal *w) 1895ev_signal_start (EV_P_ ev_signal *w)
822{ 1896{
1897#if EV_MULTIPLICITY
1898 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1899#endif
823 if (ev_is_active (w)) 1900 if (expect_false (ev_is_active (w)))
824 return; 1901 return;
825 1902
826 ev_start ((W)w, 1); 1903 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1904
1905 evpipe_init (EV_A);
1906
1907 {
1908#ifndef _WIN32
1909 sigset_t full, prev;
1910 sigfillset (&full);
1911 sigprocmask (SIG_SETMASK, &full, &prev);
1912#endif
1913
827 array_needsize (signals, signalmax, w->signum, signals_init); 1914 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1915
1916#ifndef _WIN32
1917 sigprocmask (SIG_SETMASK, &prev, 0);
1918#endif
1919 }
1920
1921 ev_start (EV_A_ (W)w, 1);
828 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 1922 wlist_add (&signals [w->signum - 1].head, (WL)w);
829 1923
830 if (!w->next) 1924 if (!((WL)w)->next)
831 { 1925 {
1926#if _WIN32
1927 signal (w->signum, sighandler);
1928#else
832 struct sigaction sa; 1929 struct sigaction sa;
833 sa.sa_handler = sighandler; 1930 sa.sa_handler = sighandler;
834 sigfillset (&sa.sa_mask); 1931 sigfillset (&sa.sa_mask);
835 sa.sa_flags = 0; 1932 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
836 sigaction (w->signum, &sa, 0); 1933 sigaction (w->signum, &sa, 0);
1934#endif
837 } 1935 }
838} 1936}
839 1937
840void 1938void noinline
841evsignal_stop (struct ev_signal *w) 1939ev_signal_stop (EV_P_ ev_signal *w)
842{ 1940{
843 ev_clear ((W)w); 1941 clear_pending (EV_A_ (W)w);
844 if (!ev_is_active (w)) 1942 if (expect_false (!ev_is_active (w)))
845 return; 1943 return;
846 1944
847 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 1945 wlist_del (&signals [w->signum - 1].head, (WL)w);
848 ev_stop ((W)w); 1946 ev_stop (EV_A_ (W)w);
849 1947
850 if (!signals [w->signum - 1].head) 1948 if (!signals [w->signum - 1].head)
851 signal (w->signum, SIG_DFL); 1949 signal (w->signum, SIG_DFL);
852} 1950}
853 1951
854void evidle_start (struct ev_idle *w) 1952void
1953ev_child_start (EV_P_ ev_child *w)
855{ 1954{
1955#if EV_MULTIPLICITY
1956 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1957#endif
856 if (ev_is_active (w)) 1958 if (expect_false (ev_is_active (w)))
857 return; 1959 return;
858 1960
859 ev_start ((W)w, ++idlecnt); 1961 ev_start (EV_A_ (W)w, 1);
860 array_needsize (idles, idlemax, idlecnt, ); 1962 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
861 idles [idlecnt - 1] = w;
862} 1963}
863 1964
864void evidle_stop (struct ev_idle *w) 1965void
1966ev_child_stop (EV_P_ ev_child *w)
865{ 1967{
866 ev_clear ((W)w); 1968 clear_pending (EV_A_ (W)w);
867 if (ev_is_active (w)) 1969 if (expect_false (!ev_is_active (w)))
868 return; 1970 return;
869 1971
870 idles [w->active - 1] = idles [--idlecnt]; 1972 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
871 ev_stop ((W)w); 1973 ev_stop (EV_A_ (W)w);
872} 1974}
873 1975
1976#if EV_STAT_ENABLE
1977
1978# ifdef _WIN32
1979# undef lstat
1980# define lstat(a,b) _stati64 (a,b)
1981# endif
1982
1983#define DEF_STAT_INTERVAL 5.0074891
1984#define MIN_STAT_INTERVAL 0.1074891
1985
1986static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1987
1988#if EV_USE_INOTIFY
1989# define EV_INOTIFY_BUFSIZE 8192
1990
1991static void noinline
1992infy_add (EV_P_ ev_stat *w)
1993{
1994 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);
1995
1996 if (w->wd < 0)
1997 {
1998 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1999
2000 /* monitor some parent directory for speedup hints */
2001 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2002 {
2003 char path [4096];
2004 strcpy (path, w->path);
2005
2006 do
2007 {
2008 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2009 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2010
2011 char *pend = strrchr (path, '/');
2012
2013 if (!pend)
2014 break; /* whoops, no '/', complain to your admin */
2015
2016 *pend = 0;
2017 w->wd = inotify_add_watch (fs_fd, path, mask);
2018 }
2019 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2020 }
2021 }
2022 else
2023 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2024
2025 if (w->wd >= 0)
2026 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2027}
2028
2029static void noinline
2030infy_del (EV_P_ ev_stat *w)
2031{
2032 int slot;
2033 int wd = w->wd;
2034
2035 if (wd < 0)
2036 return;
2037
2038 w->wd = -2;
2039 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2040 wlist_del (&fs_hash [slot].head, (WL)w);
2041
2042 /* remove this watcher, if others are watching it, they will rearm */
2043 inotify_rm_watch (fs_fd, wd);
2044}
2045
2046static void noinline
2047infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2048{
2049 if (slot < 0)
2050 /* overflow, need to check for all hahs slots */
2051 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2052 infy_wd (EV_A_ slot, wd, ev);
2053 else
2054 {
2055 WL w_;
2056
2057 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2058 {
2059 ev_stat *w = (ev_stat *)w_;
2060 w_ = w_->next; /* lets us remove this watcher and all before it */
2061
2062 if (w->wd == wd || wd == -1)
2063 {
2064 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2065 {
2066 w->wd = -1;
2067 infy_add (EV_A_ w); /* re-add, no matter what */
2068 }
2069
2070 stat_timer_cb (EV_A_ &w->timer, 0);
2071 }
2072 }
2073 }
2074}
2075
2076static void
2077infy_cb (EV_P_ ev_io *w, int revents)
2078{
2079 char buf [EV_INOTIFY_BUFSIZE];
2080 struct inotify_event *ev = (struct inotify_event *)buf;
2081 int ofs;
2082 int len = read (fs_fd, buf, sizeof (buf));
2083
2084 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2085 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2086}
2087
2088void inline_size
2089infy_init (EV_P)
2090{
2091 if (fs_fd != -2)
2092 return;
2093
2094 fs_fd = inotify_init ();
2095
2096 if (fs_fd >= 0)
2097 {
2098 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2099 ev_set_priority (&fs_w, EV_MAXPRI);
2100 ev_io_start (EV_A_ &fs_w);
2101 }
2102}
2103
2104void inline_size
2105infy_fork (EV_P)
2106{
2107 int slot;
2108
2109 if (fs_fd < 0)
2110 return;
2111
2112 close (fs_fd);
2113 fs_fd = inotify_init ();
2114
2115 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2116 {
2117 WL w_ = fs_hash [slot].head;
2118 fs_hash [slot].head = 0;
2119
2120 while (w_)
2121 {
2122 ev_stat *w = (ev_stat *)w_;
2123 w_ = w_->next; /* lets us add this watcher */
2124
2125 w->wd = -1;
2126
2127 if (fs_fd >= 0)
2128 infy_add (EV_A_ w); /* re-add, no matter what */
2129 else
2130 ev_timer_start (EV_A_ &w->timer);
2131 }
2132
2133 }
2134}
2135
2136#endif
2137
2138void
2139ev_stat_stat (EV_P_ ev_stat *w)
2140{
2141 if (lstat (w->path, &w->attr) < 0)
2142 w->attr.st_nlink = 0;
2143 else if (!w->attr.st_nlink)
2144 w->attr.st_nlink = 1;
2145}
2146
2147static void noinline
2148stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2149{
2150 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2151
2152 /* we copy this here each the time so that */
2153 /* prev has the old value when the callback gets invoked */
2154 w->prev = w->attr;
2155 ev_stat_stat (EV_A_ w);
2156
2157 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2158 if (
2159 w->prev.st_dev != w->attr.st_dev
2160 || w->prev.st_ino != w->attr.st_ino
2161 || w->prev.st_mode != w->attr.st_mode
2162 || w->prev.st_nlink != w->attr.st_nlink
2163 || w->prev.st_uid != w->attr.st_uid
2164 || w->prev.st_gid != w->attr.st_gid
2165 || w->prev.st_rdev != w->attr.st_rdev
2166 || w->prev.st_size != w->attr.st_size
2167 || w->prev.st_atime != w->attr.st_atime
2168 || w->prev.st_mtime != w->attr.st_mtime
2169 || w->prev.st_ctime != w->attr.st_ctime
2170 ) {
2171 #if EV_USE_INOTIFY
2172 infy_del (EV_A_ w);
2173 infy_add (EV_A_ w);
2174 ev_stat_stat (EV_A_ w); /* avoid race... */
2175 #endif
2176
2177 ev_feed_event (EV_A_ w, EV_STAT);
2178 }
2179}
2180
2181void
2182ev_stat_start (EV_P_ ev_stat *w)
2183{
2184 if (expect_false (ev_is_active (w)))
2185 return;
2186
2187 /* since we use memcmp, we need to clear any padding data etc. */
2188 memset (&w->prev, 0, sizeof (ev_statdata));
2189 memset (&w->attr, 0, sizeof (ev_statdata));
2190
2191 ev_stat_stat (EV_A_ w);
2192
2193 if (w->interval < MIN_STAT_INTERVAL)
2194 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2195
2196 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2197 ev_set_priority (&w->timer, ev_priority (w));
2198
2199#if EV_USE_INOTIFY
2200 infy_init (EV_A);
2201
2202 if (fs_fd >= 0)
2203 infy_add (EV_A_ w);
2204 else
2205#endif
2206 ev_timer_start (EV_A_ &w->timer);
2207
2208 ev_start (EV_A_ (W)w, 1);
2209}
2210
2211void
2212ev_stat_stop (EV_P_ ev_stat *w)
2213{
2214 clear_pending (EV_A_ (W)w);
2215 if (expect_false (!ev_is_active (w)))
2216 return;
2217
2218#if EV_USE_INOTIFY
2219 infy_del (EV_A_ w);
2220#endif
2221 ev_timer_stop (EV_A_ &w->timer);
2222
2223 ev_stop (EV_A_ (W)w);
2224}
2225#endif
2226
2227#if EV_IDLE_ENABLE
2228void
2229ev_idle_start (EV_P_ ev_idle *w)
2230{
2231 if (expect_false (ev_is_active (w)))
2232 return;
2233
2234 pri_adjust (EV_A_ (W)w);
2235
2236 {
2237 int active = ++idlecnt [ABSPRI (w)];
2238
2239 ++idleall;
2240 ev_start (EV_A_ (W)w, active);
2241
2242 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2243 idles [ABSPRI (w)][active - 1] = w;
2244 }
2245}
2246
2247void
2248ev_idle_stop (EV_P_ ev_idle *w)
2249{
2250 clear_pending (EV_A_ (W)w);
2251 if (expect_false (!ev_is_active (w)))
2252 return;
2253
2254 {
2255 int active = ((W)w)->active;
2256
2257 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2258 ((W)idles [ABSPRI (w)][active - 1])->active = active;
2259
2260 ev_stop (EV_A_ (W)w);
2261 --idleall;
2262 }
2263}
2264#endif
2265
2266void
874void evprepare_start (struct ev_prepare *w) 2267ev_prepare_start (EV_P_ ev_prepare *w)
875{ 2268{
876 if (ev_is_active (w)) 2269 if (expect_false (ev_is_active (w)))
877 return; 2270 return;
878 2271
879 ev_start ((W)w, ++preparecnt); 2272 ev_start (EV_A_ (W)w, ++preparecnt);
880 array_needsize (prepares, preparemax, preparecnt, ); 2273 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
881 prepares [preparecnt - 1] = w; 2274 prepares [preparecnt - 1] = w;
882} 2275}
883 2276
2277void
884void evprepare_stop (struct ev_prepare *w) 2278ev_prepare_stop (EV_P_ ev_prepare *w)
885{ 2279{
886 ev_clear ((W)w); 2280 clear_pending (EV_A_ (W)w);
887 if (ev_is_active (w)) 2281 if (expect_false (!ev_is_active (w)))
888 return; 2282 return;
889 2283
2284 {
2285 int active = ((W)w)->active;
890 prepares [w->active - 1] = prepares [--preparecnt]; 2286 prepares [active - 1] = prepares [--preparecnt];
2287 ((W)prepares [active - 1])->active = active;
2288 }
2289
891 ev_stop ((W)w); 2290 ev_stop (EV_A_ (W)w);
892} 2291}
893 2292
2293void
894void evcheck_start (struct ev_check *w) 2294ev_check_start (EV_P_ ev_check *w)
895{ 2295{
896 if (ev_is_active (w)) 2296 if (expect_false (ev_is_active (w)))
897 return; 2297 return;
898 2298
899 ev_start ((W)w, ++checkcnt); 2299 ev_start (EV_A_ (W)w, ++checkcnt);
900 array_needsize (checks, checkmax, checkcnt, ); 2300 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
901 checks [checkcnt - 1] = w; 2301 checks [checkcnt - 1] = w;
902} 2302}
903 2303
2304void
904void evcheck_stop (struct ev_check *w) 2305ev_check_stop (EV_P_ ev_check *w)
905{ 2306{
906 ev_clear ((W)w); 2307 clear_pending (EV_A_ (W)w);
907 if (ev_is_active (w)) 2308 if (expect_false (!ev_is_active (w)))
908 return; 2309 return;
909 2310
2311 {
2312 int active = ((W)w)->active;
910 checks [w->active - 1] = checks [--checkcnt]; 2313 checks [active - 1] = checks [--checkcnt];
2314 ((W)checks [active - 1])->active = active;
2315 }
2316
911 ev_stop ((W)w); 2317 ev_stop (EV_A_ (W)w);
912} 2318}
913 2319
914void evchild_start (struct ev_child *w) 2320#if EV_EMBED_ENABLE
2321void noinline
2322ev_embed_sweep (EV_P_ ev_embed *w)
915{ 2323{
2324 ev_loop (w->other, EVLOOP_NONBLOCK);
2325}
2326
2327static void
2328embed_io_cb (EV_P_ ev_io *io, int revents)
2329{
2330 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2331
916 if (ev_is_active (w)) 2332 if (ev_cb (w))
917 return; 2333 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2334 else
2335 ev_loop (w->other, EVLOOP_NONBLOCK);
2336}
918 2337
2338static void
2339embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2340{
2341 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2342
2343 {
2344 struct ev_loop *loop = w->other;
2345
2346 while (fdchangecnt)
2347 {
2348 fd_reify (EV_A);
2349 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2350 }
2351 }
2352}
2353
2354#if 0
2355static void
2356embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2357{
2358 ev_idle_stop (EV_A_ idle);
2359}
2360#endif
2361
2362void
2363ev_embed_start (EV_P_ ev_embed *w)
2364{
2365 if (expect_false (ev_is_active (w)))
2366 return;
2367
2368 {
2369 struct ev_loop *loop = w->other;
2370 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2371 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2372 }
2373
2374 ev_set_priority (&w->io, ev_priority (w));
2375 ev_io_start (EV_A_ &w->io);
2376
2377 ev_prepare_init (&w->prepare, embed_prepare_cb);
2378 ev_set_priority (&w->prepare, EV_MINPRI);
2379 ev_prepare_start (EV_A_ &w->prepare);
2380
2381 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2382
919 ev_start ((W)w, 1); 2383 ev_start (EV_A_ (W)w, 1);
920 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
921} 2384}
922 2385
923void evchild_stop (struct ev_child *w) 2386void
2387ev_embed_stop (EV_P_ ev_embed *w)
924{ 2388{
925 ev_clear ((W)w); 2389 clear_pending (EV_A_ (W)w);
926 if (ev_is_active (w)) 2390 if (expect_false (!ev_is_active (w)))
927 return; 2391 return;
928 2392
929 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2393 ev_io_stop (EV_A_ &w->io);
2394 ev_prepare_stop (EV_A_ &w->prepare);
2395
930 ev_stop ((W)w); 2396 ev_stop (EV_A_ (W)w);
931} 2397}
2398#endif
2399
2400#if EV_FORK_ENABLE
2401void
2402ev_fork_start (EV_P_ ev_fork *w)
2403{
2404 if (expect_false (ev_is_active (w)))
2405 return;
2406
2407 ev_start (EV_A_ (W)w, ++forkcnt);
2408 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2409 forks [forkcnt - 1] = w;
2410}
2411
2412void
2413ev_fork_stop (EV_P_ ev_fork *w)
2414{
2415 clear_pending (EV_A_ (W)w);
2416 if (expect_false (!ev_is_active (w)))
2417 return;
2418
2419 {
2420 int active = ((W)w)->active;
2421 forks [active - 1] = forks [--forkcnt];
2422 ((W)forks [active - 1])->active = active;
2423 }
2424
2425 ev_stop (EV_A_ (W)w);
2426}
2427#endif
2428
2429#if EV_ASYNC_ENABLE
2430void
2431ev_async_start (EV_P_ ev_async *w)
2432{
2433 if (expect_false (ev_is_active (w)))
2434 return;
2435
2436 evpipe_init (EV_A);
2437
2438 ev_start (EV_A_ (W)w, ++asynccnt);
2439 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2440 asyncs [asynccnt - 1] = w;
2441}
2442
2443void
2444ev_async_stop (EV_P_ ev_async *w)
2445{
2446 clear_pending (EV_A_ (W)w);
2447 if (expect_false (!ev_is_active (w)))
2448 return;
2449
2450 {
2451 int active = ((W)w)->active;
2452 asyncs [active - 1] = asyncs [--asynccnt];
2453 ((W)asyncs [active - 1])->active = active;
2454 }
2455
2456 ev_stop (EV_A_ (W)w);
2457}
2458
2459void
2460ev_async_send (EV_P_ ev_async *w)
2461{
2462 w->sent = 1;
2463 evpipe_write (EV_A_ 0, 1);
2464}
2465#endif
932 2466
933/*****************************************************************************/ 2467/*****************************************************************************/
934 2468
935struct ev_once 2469struct ev_once
936{ 2470{
937 struct ev_io io; 2471 ev_io io;
938 struct ev_timer to; 2472 ev_timer to;
939 void (*cb)(int revents, void *arg); 2473 void (*cb)(int revents, void *arg);
940 void *arg; 2474 void *arg;
941}; 2475};
942 2476
943static void 2477static void
944once_cb (struct ev_once *once, int revents) 2478once_cb (EV_P_ struct ev_once *once, int revents)
945{ 2479{
946 void (*cb)(int revents, void *arg) = once->cb; 2480 void (*cb)(int revents, void *arg) = once->cb;
947 void *arg = once->arg; 2481 void *arg = once->arg;
948 2482
949 evio_stop (&once->io); 2483 ev_io_stop (EV_A_ &once->io);
950 evtimer_stop (&once->to); 2484 ev_timer_stop (EV_A_ &once->to);
951 free (once); 2485 ev_free (once);
952 2486
953 cb (revents, arg); 2487 cb (revents, arg);
954} 2488}
955 2489
956static void 2490static void
957once_cb_io (struct ev_io *w, int revents) 2491once_cb_io (EV_P_ ev_io *w, int revents)
958{ 2492{
959 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2493 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
960} 2494}
961 2495
962static void 2496static void
963once_cb_to (struct ev_timer *w, int revents) 2497once_cb_to (EV_P_ ev_timer *w, int revents)
964{ 2498{
965 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2499 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
966} 2500}
967 2501
968void 2502void
969ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2503ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
970{ 2504{
971 struct ev_once *once = malloc (sizeof (struct ev_once)); 2505 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
972 2506
973 if (!once) 2507 if (expect_false (!once))
974 cb (EV_ERROR, arg); 2508 {
975 else 2509 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
2510 return;
976 { 2511 }
2512
977 once->cb = cb; 2513 once->cb = cb;
978 once->arg = arg; 2514 once->arg = arg;
979 2515
980 evw_init (&once->io, once_cb_io); 2516 ev_init (&once->io, once_cb_io);
981
982 if (fd >= 0) 2517 if (fd >= 0)
983 { 2518 {
984 evio_set (&once->io, fd, events); 2519 ev_io_set (&once->io, fd, events);
985 evio_start (&once->io); 2520 ev_io_start (EV_A_ &once->io);
986 } 2521 }
987 2522
988 evw_init (&once->to, once_cb_to); 2523 ev_init (&once->to, once_cb_to);
989
990 if (timeout >= 0.) 2524 if (timeout >= 0.)
991 { 2525 {
992 evtimer_set (&once->to, timeout, 0.); 2526 ev_timer_set (&once->to, timeout, 0.);
993 evtimer_start (&once->to); 2527 ev_timer_start (EV_A_ &once->to);
994 }
995 }
996}
997
998/*****************************************************************************/
999
1000#if 0
1001
1002struct ev_io wio;
1003
1004static void
1005sin_cb (struct ev_io *w, int revents)
1006{
1007 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1008}
1009
1010static void
1011ocb (struct ev_timer *w, int revents)
1012{
1013 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1014 evtimer_stop (w);
1015 evtimer_start (w);
1016}
1017
1018static void
1019scb (struct ev_signal *w, int revents)
1020{
1021 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1022 evio_stop (&wio);
1023 evio_start (&wio);
1024}
1025
1026static void
1027gcb (struct ev_signal *w, int revents)
1028{
1029 fprintf (stderr, "generic %x\n", revents);
1030
1031}
1032
1033int main (void)
1034{
1035 ev_init (0);
1036
1037 evio_init (&wio, sin_cb, 0, EV_READ);
1038 evio_start (&wio);
1039
1040 struct ev_timer t[10000];
1041
1042#if 0
1043 int i;
1044 for (i = 0; i < 10000; ++i)
1045 { 2528 }
1046 struct ev_timer *w = t + i;
1047 evw_init (w, ocb, i);
1048 evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1049 evtimer_start (w);
1050 if (drand48 () < 0.5)
1051 evtimer_stop (w);
1052 }
1053#endif
1054
1055 struct ev_timer t1;
1056 evtimer_init (&t1, ocb, 5, 10);
1057 evtimer_start (&t1);
1058
1059 struct ev_signal sig;
1060 evsignal_init (&sig, scb, SIGQUIT);
1061 evsignal_start (&sig);
1062
1063 struct ev_check cw;
1064 evcheck_init (&cw, gcb);
1065 evcheck_start (&cw);
1066
1067 struct ev_idle iw;
1068 evidle_init (&iw, gcb);
1069 evidle_start (&iw);
1070
1071 ev_loop (0);
1072
1073 return 0;
1074} 2529}
1075 2530
2531#if EV_MULTIPLICITY
2532 #include "ev_wrap.h"
1076#endif 2533#endif
1077 2534
2535#ifdef __cplusplus
2536}
2537#endif
1078 2538
1079
1080

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