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Comparing libev/ev.c (file contents):
Revision 1.21 by root, Wed Oct 31 18:37:38 2007 UTC vs.
Revision 1.222 by root, Sun Apr 6 12:45:58 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/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC
54# define EV_USE_MONOTONIC 1
55# endif
56# ifndef EV_USE_REALTIME
57# define EV_USE_REALTIME 1
58# endif
59# else
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0
62# endif
63# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0
65# endif
66# endif
67
68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
73# endif
74# endif
75
76# ifndef EV_USE_SELECT
77# if HAVE_SELECT && HAVE_SYS_SELECT_H
78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif
82# endif
83
84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
86# define EV_USE_POLL 1
87# else
88# define EV_USE_POLL 0
89# endif
90# endif
91
92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94# define EV_USE_EPOLL 1
95# else
96# define EV_USE_EPOLL 0
97# endif
98# endif
99
100# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif
106# endif
107
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1
111# else
112# define EV_USE_PORT 0
113# endif
114# endif
115
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1
119# else
120# define EV_USE_INOTIFY 0
121# endif
122# endif
123
124# ifndef EV_USE_EVENTFD
125# if HAVE_EVENTFD
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif
130# endif
131
132#endif
29 133
30#include <math.h> 134#include <math.h>
31#include <stdlib.h> 135#include <stdlib.h>
32#include <unistd.h>
33#include <fcntl.h> 136#include <fcntl.h>
34#include <signal.h>
35#include <stddef.h> 137#include <stddef.h>
36 138
37#include <stdio.h> 139#include <stdio.h>
38 140
39#include <assert.h> 141#include <assert.h>
40#include <errno.h> 142#include <errno.h>
41#include <sys/time.h> 143#include <sys/types.h>
42#include <time.h> 144#include <time.h>
43 145
44#ifndef HAVE_MONOTONIC 146#include <signal.h>
45# ifdef CLOCK_MONOTONIC 147
46# define HAVE_MONOTONIC 1 148#ifdef EV_H
149# include EV_H
150#else
151# include "ev.h"
152#endif
153
154#ifndef _WIN32
155# include <sys/time.h>
156# include <sys/wait.h>
157# include <unistd.h>
158#else
159# define WIN32_LEAN_AND_MEAN
160# include <windows.h>
161# ifndef EV_SELECT_IS_WINSOCKET
162# define EV_SELECT_IS_WINSOCKET 1
47# endif 163# endif
48#endif 164#endif
49 165
166/* this block tries to deduce configuration from header-defined symbols and defaults */
167
168#ifndef EV_USE_MONOTONIC
169# define EV_USE_MONOTONIC 0
170#endif
171
172#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0
174#endif
175
176#ifndef EV_USE_NANOSLEEP
177# define EV_USE_NANOSLEEP 0
178#endif
179
50#ifndef HAVE_SELECT 180#ifndef EV_USE_SELECT
51# define HAVE_SELECT 1 181# define EV_USE_SELECT 1
182#endif
183
184#ifndef EV_USE_POLL
185# ifdef _WIN32
186# define EV_USE_POLL 0
187# else
188# define EV_USE_POLL 1
52#endif 189# endif
190#endif
53 191
54#ifndef HAVE_EPOLL 192#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1
195# else
55# define HAVE_EPOLL 0 196# define EV_USE_EPOLL 0
56#endif 197# endif
198#endif
57 199
58#ifndef HAVE_REALTIME 200#ifndef EV_USE_KQUEUE
59# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ 201# define EV_USE_KQUEUE 0
202#endif
203
204#ifndef EV_USE_PORT
205# define EV_USE_PORT 0
206#endif
207
208#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1
211# else
212# define EV_USE_INOTIFY 0
60#endif 213# endif
214#endif
215
216#ifndef EV_PID_HASHSIZE
217# if EV_MINIMAL
218# define EV_PID_HASHSIZE 1
219# else
220# define EV_PID_HASHSIZE 16
221# endif
222#endif
223
224#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL
226# define EV_INOTIFY_HASHSIZE 1
227# else
228# define EV_INOTIFY_HASHSIZE 16
229# endif
230#endif
231
232#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1
235# else
236# define EV_USE_EVENTFD 0
237# endif
238#endif
239
240/* this block fixes any misconfiguration where we know we run into trouble otherwise */
241
242#ifndef CLOCK_MONOTONIC
243# undef EV_USE_MONOTONIC
244# define EV_USE_MONOTONIC 0
245#endif
246
247#ifndef CLOCK_REALTIME
248# undef EV_USE_REALTIME
249# define EV_USE_REALTIME 0
250#endif
251
252#if !EV_STAT_ENABLE
253# undef EV_USE_INOTIFY
254# define EV_USE_INOTIFY 0
255#endif
256
257#if !EV_USE_NANOSLEEP
258# ifndef _WIN32
259# include <sys/select.h>
260# endif
261#endif
262
263#if EV_USE_INOTIFY
264# include <sys/inotify.h>
265#endif
266
267#if EV_SELECT_IS_WINSOCKET
268# include <winsock.h>
269#endif
270
271#if EV_USE_EVENTFD
272/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
273# include <stdint.h>
274# ifdef __cplusplus
275extern "C" {
276# endif
277int eventfd (unsigned int initval, int flags);
278# ifdef __cplusplus
279}
280# endif
281#endif
282
283/**/
284
285/*
286 * This is used to avoid floating point rounding problems.
287 * It is added to ev_rt_now when scheduling periodics
288 * to ensure progress, time-wise, even when rounding
289 * errors are against us.
290 * This value is good at least till the year 4000.
291 * Better solutions welcome.
292 */
293#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
61 294
62#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 295#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
63#define MAX_BLOCKTIME 60. 296#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
297/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
64 298
65#include "ev.h" 299#if __GNUC__ >= 4
300# define expect(expr,value) __builtin_expect ((expr),(value))
301# define noinline __attribute__ ((noinline))
302#else
303# define expect(expr,value) (expr)
304# define noinline
305# if __STDC_VERSION__ < 199901L
306# define inline
307# endif
308#endif
66 309
310#define expect_false(expr) expect ((expr) != 0, 0)
311#define expect_true(expr) expect ((expr) != 0, 1)
312#define inline_size static inline
313
314#if EV_MINIMAL
315# define inline_speed static noinline
316#else
317# define inline_speed static inline
318#endif
319
320#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
321#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
322
323#define EMPTY /* required for microsofts broken pseudo-c compiler */
324#define EMPTY2(a,b) /* used to suppress some warnings */
325
67typedef struct ev_watcher *W; 326typedef ev_watcher *W;
68typedef struct ev_watcher_list *WL; 327typedef ev_watcher_list *WL;
69typedef struct ev_watcher_time *WT; 328typedef ev_watcher_time *WT;
70 329
71static ev_tstamp now, diff; /* monotonic clock */ 330#if EV_USE_MONOTONIC
331/* sig_atomic_t is used to avoid per-thread variables or locking but still */
332/* giving it a reasonably high chance of working on typical architetcures */
333static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
334#endif
335
336#ifdef _WIN32
337# include "ev_win32.c"
338#endif
339
340/*****************************************************************************/
341
342static void (*syserr_cb)(const char *msg);
343
344void
345ev_set_syserr_cb (void (*cb)(const char *msg))
346{
347 syserr_cb = cb;
348}
349
350static void noinline
351syserr (const char *msg)
352{
353 if (!msg)
354 msg = "(libev) system error";
355
356 if (syserr_cb)
357 syserr_cb (msg);
358 else
359 {
360 perror (msg);
361 abort ();
362 }
363}
364
365static void *(*alloc)(void *ptr, long size);
366
367void
368ev_set_allocator (void *(*cb)(void *ptr, long size))
369{
370 alloc = cb;
371}
372
373inline_speed void *
374ev_realloc (void *ptr, long size)
375{
376 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
377
378 if (!ptr && size)
379 {
380 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
381 abort ();
382 }
383
384 return ptr;
385}
386
387#define ev_malloc(size) ev_realloc (0, (size))
388#define ev_free(ptr) ev_realloc ((ptr), 0)
389
390/*****************************************************************************/
391
392typedef struct
393{
394 WL head;
395 unsigned char events;
396 unsigned char reify;
397#if EV_SELECT_IS_WINSOCKET
398 SOCKET handle;
399#endif
400} ANFD;
401
402typedef struct
403{
404 W w;
405 int events;
406} ANPENDING;
407
408#if EV_USE_INOTIFY
409typedef struct
410{
411 WL head;
412} ANFS;
413#endif
414
415#if EV_MULTIPLICITY
416
417 struct ev_loop
418 {
419 ev_tstamp ev_rt_now;
420 #define ev_rt_now ((loop)->ev_rt_now)
421 #define VAR(name,decl) decl;
422 #include "ev_vars.h"
423 #undef VAR
424 };
425 #include "ev_wrap.h"
426
427 static struct ev_loop default_loop_struct;
428 struct ev_loop *ev_default_loop_ptr;
429
430#else
431
72ev_tstamp ev_now; 432 ev_tstamp ev_rt_now;
73int ev_method; 433 #define VAR(name,decl) static decl;
434 #include "ev_vars.h"
435 #undef VAR
74 436
75static int have_monotonic; /* runtime */ 437 static int ev_default_loop_ptr;
76 438
77static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 439#endif
78static void (*method_modify)(int fd, int oev, int nev);
79static void (*method_poll)(ev_tstamp timeout);
80 440
81/*****************************************************************************/ 441/*****************************************************************************/
82 442
83ev_tstamp 443ev_tstamp
84ev_time (void) 444ev_time (void)
85{ 445{
86#if HAVE_REALTIME 446#if EV_USE_REALTIME
87 struct timespec ts; 447 struct timespec ts;
88 clock_gettime (CLOCK_REALTIME, &ts); 448 clock_gettime (CLOCK_REALTIME, &ts);
89 return ts.tv_sec + ts.tv_nsec * 1e-9; 449 return ts.tv_sec + ts.tv_nsec * 1e-9;
90#else 450#else
91 struct timeval tv; 451 struct timeval tv;
92 gettimeofday (&tv, 0); 452 gettimeofday (&tv, 0);
93 return tv.tv_sec + tv.tv_usec * 1e-6; 453 return tv.tv_sec + tv.tv_usec * 1e-6;
94#endif 454#endif
95} 455}
96 456
97static ev_tstamp 457ev_tstamp inline_size
98get_clock (void) 458get_clock (void)
99{ 459{
100#if HAVE_MONOTONIC 460#if EV_USE_MONOTONIC
101 if (have_monotonic) 461 if (expect_true (have_monotonic))
102 { 462 {
103 struct timespec ts; 463 struct timespec ts;
104 clock_gettime (CLOCK_MONOTONIC, &ts); 464 clock_gettime (CLOCK_MONOTONIC, &ts);
105 return ts.tv_sec + ts.tv_nsec * 1e-9; 465 return ts.tv_sec + ts.tv_nsec * 1e-9;
106 } 466 }
107#endif 467#endif
108 468
109 return ev_time (); 469 return ev_time ();
110} 470}
111 471
112#define array_needsize(base,cur,cnt,init) \ 472#if EV_MULTIPLICITY
113 if ((cnt) > cur) \ 473ev_tstamp
114 { \ 474ev_now (EV_P)
115 int newcnt = cur ? cur << 1 : 16; \ 475{
116 base = realloc (base, sizeof (*base) * (newcnt)); \ 476 return ev_rt_now;
117 init (base + cur, newcnt - cur); \ 477}
118 cur = newcnt; \ 478#endif
479
480void
481ev_sleep (ev_tstamp delay)
482{
483 if (delay > 0.)
119 } 484 {
485#if EV_USE_NANOSLEEP
486 struct timespec ts;
487
488 ts.tv_sec = (time_t)delay;
489 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
490
491 nanosleep (&ts, 0);
492#elif defined(_WIN32)
493 Sleep ((unsigned long)(delay * 1e3));
494#else
495 struct timeval tv;
496
497 tv.tv_sec = (time_t)delay;
498 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
499
500 select (0, 0, 0, 0, &tv);
501#endif
502 }
503}
120 504
121/*****************************************************************************/ 505/*****************************************************************************/
122 506
507int inline_size
508array_nextsize (int elem, int cur, int cnt)
509{
510 int ncur = cur + 1;
511
512 do
513 ncur <<= 1;
514 while (cnt > ncur);
515
516 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
517 if (elem * ncur > 4096)
518 {
519 ncur *= elem;
520 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
521 ncur = ncur - sizeof (void *) * 4;
522 ncur /= elem;
523 }
524
525 return ncur;
526}
527
528static noinline void *
529array_realloc (int elem, void *base, int *cur, int cnt)
530{
531 *cur = array_nextsize (elem, *cur, cnt);
532 return ev_realloc (base, elem * *cur);
533}
534
535#define array_needsize(type,base,cur,cnt,init) \
536 if (expect_false ((cnt) > (cur))) \
537 { \
538 int ocur_ = (cur); \
539 (base) = (type *)array_realloc \
540 (sizeof (type), (base), &(cur), (cnt)); \
541 init ((base) + (ocur_), (cur) - ocur_); \
542 }
543
544#if 0
545#define array_slim(type,stem) \
546 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
547 { \
548 stem ## max = array_roundsize (stem ## cnt >> 1); \
549 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
550 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
551 }
552#endif
553
554#define array_free(stem, idx) \
555 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
556
557/*****************************************************************************/
558
559void noinline
560ev_feed_event (EV_P_ void *w, int revents)
561{
562 W w_ = (W)w;
563 int pri = ABSPRI (w_);
564
565 if (expect_false (w_->pending))
566 pendings [pri][w_->pending - 1].events |= revents;
567 else
568 {
569 w_->pending = ++pendingcnt [pri];
570 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
571 pendings [pri][w_->pending - 1].w = w_;
572 pendings [pri][w_->pending - 1].events = revents;
573 }
574}
575
576void inline_speed
577queue_events (EV_P_ W *events, int eventcnt, int type)
578{
579 int i;
580
581 for (i = 0; i < eventcnt; ++i)
582 ev_feed_event (EV_A_ events [i], type);
583}
584
585/*****************************************************************************/
586
587void inline_size
588anfds_init (ANFD *base, int count)
589{
590 while (count--)
591 {
592 base->head = 0;
593 base->events = EV_NONE;
594 base->reify = 0;
595
596 ++base;
597 }
598}
599
600void inline_speed
601fd_event (EV_P_ int fd, int revents)
602{
603 ANFD *anfd = anfds + fd;
604 ev_io *w;
605
606 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
607 {
608 int ev = w->events & revents;
609
610 if (ev)
611 ev_feed_event (EV_A_ (W)w, ev);
612 }
613}
614
615void
616ev_feed_fd_event (EV_P_ int fd, int revents)
617{
618 if (fd >= 0 && fd < anfdmax)
619 fd_event (EV_A_ fd, revents);
620}
621
622void inline_size
623fd_reify (EV_P)
624{
625 int i;
626
627 for (i = 0; i < fdchangecnt; ++i)
628 {
629 int fd = fdchanges [i];
630 ANFD *anfd = anfds + fd;
631 ev_io *w;
632
633 unsigned char events = 0;
634
635 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
636 events |= (unsigned char)w->events;
637
638#if EV_SELECT_IS_WINSOCKET
639 if (events)
640 {
641 unsigned long argp;
642 #ifdef EV_FD_TO_WIN32_HANDLE
643 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
644 #else
645 anfd->handle = _get_osfhandle (fd);
646 #endif
647 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
648 }
649#endif
650
651 {
652 unsigned char o_events = anfd->events;
653 unsigned char o_reify = anfd->reify;
654
655 anfd->reify = 0;
656 anfd->events = events;
657
658 if (o_events != events || o_reify & EV_IOFDSET)
659 backend_modify (EV_A_ fd, o_events, events);
660 }
661 }
662
663 fdchangecnt = 0;
664}
665
666void inline_size
667fd_change (EV_P_ int fd, int flags)
668{
669 unsigned char reify = anfds [fd].reify;
670 anfds [fd].reify |= flags;
671
672 if (expect_true (!reify))
673 {
674 ++fdchangecnt;
675 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
676 fdchanges [fdchangecnt - 1] = fd;
677 }
678}
679
680void inline_speed
681fd_kill (EV_P_ int fd)
682{
683 ev_io *w;
684
685 while ((w = (ev_io *)anfds [fd].head))
686 {
687 ev_io_stop (EV_A_ w);
688 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
689 }
690}
691
692int inline_size
693fd_valid (int fd)
694{
695#ifdef _WIN32
696 return _get_osfhandle (fd) != -1;
697#else
698 return fcntl (fd, F_GETFD) != -1;
699#endif
700}
701
702/* called on EBADF to verify fds */
703static void noinline
704fd_ebadf (EV_P)
705{
706 int fd;
707
708 for (fd = 0; fd < anfdmax; ++fd)
709 if (anfds [fd].events)
710 if (!fd_valid (fd) == -1 && errno == EBADF)
711 fd_kill (EV_A_ fd);
712}
713
714/* called on ENOMEM in select/poll to kill some fds and retry */
715static void noinline
716fd_enomem (EV_P)
717{
718 int fd;
719
720 for (fd = anfdmax; fd--; )
721 if (anfds [fd].events)
722 {
723 fd_kill (EV_A_ fd);
724 return;
725 }
726}
727
728/* usually called after fork if backend needs to re-arm all fds from scratch */
729static void noinline
730fd_rearm_all (EV_P)
731{
732 int fd;
733
734 for (fd = 0; fd < anfdmax; ++fd)
735 if (anfds [fd].events)
736 {
737 anfds [fd].events = 0;
738 fd_change (EV_A_ fd, EV_IOFDSET | 1);
739 }
740}
741
742/*****************************************************************************/
743
744void inline_speed
745upheap (WT *heap, int k)
746{
747 WT w = heap [k];
748
749 while (k)
750 {
751 int p = (k - 1) >> 1;
752
753 if (heap [p]->at <= w->at)
754 break;
755
756 heap [k] = heap [p];
757 ((W)heap [k])->active = k + 1;
758 k = p;
759 }
760
761 heap [k] = w;
762 ((W)heap [k])->active = k + 1;
763}
764
765void inline_speed
766downheap (WT *heap, int N, int k)
767{
768 WT w = heap [k];
769
770 for (;;)
771 {
772 int c = (k << 1) + 1;
773
774 if (c >= N)
775 break;
776
777 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
778 ? 1 : 0;
779
780 if (w->at <= heap [c]->at)
781 break;
782
783 heap [k] = heap [c];
784 ((W)heap [k])->active = k + 1;
785
786 k = c;
787 }
788
789 heap [k] = w;
790 ((W)heap [k])->active = k + 1;
791}
792
793void inline_size
794adjustheap (WT *heap, int N, int k)
795{
796 upheap (heap, k);
797 downheap (heap, N, k);
798}
799
800/*****************************************************************************/
801
123typedef struct 802typedef struct
124{ 803{
125 struct ev_io *head; 804 WL head;
126 unsigned char wev, rev; /* want, received event set */ 805 EV_ATOMIC_T gotsig;
127} ANFD;
128
129static ANFD *anfds;
130static int anfdmax;
131
132static int *fdchanges;
133static int fdchangemax, fdchangecnt;
134
135static void
136anfds_init (ANFD *base, int count)
137{
138 while (count--)
139 {
140 base->head = 0;
141 base->wev = base->rev = EV_NONE;
142 ++base;
143 }
144}
145
146typedef struct
147{
148 W w;
149 int events;
150} ANPENDING;
151
152static ANPENDING *pendings;
153static int pendingmax, pendingcnt;
154
155static void
156event (W w, int events)
157{
158 if (w->active)
159 {
160 w->pending = ++pendingcnt;
161 array_needsize (pendings, pendingmax, pendingcnt, );
162 pendings [pendingcnt - 1].w = w;
163 pendings [pendingcnt - 1].events = events;
164 }
165}
166
167static void
168fd_event (int fd, int events)
169{
170 ANFD *anfd = anfds + fd;
171 struct ev_io *w;
172
173 for (w = anfd->head; w; w = w->next)
174 {
175 int ev = w->events & events;
176
177 if (ev)
178 event ((W)w, ev);
179 }
180}
181
182static void
183queue_events (W *events, int eventcnt, int type)
184{
185 int i;
186
187 for (i = 0; i < eventcnt; ++i)
188 event (events [i], type);
189}
190
191/* called on EBADF to verify fds */
192static void
193fd_recheck ()
194{
195 int fd;
196
197 for (fd = 0; fd < anfdmax; ++fd)
198 if (anfds [fd].wev)
199 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
200 while (anfds [fd].head)
201 evio_stop (anfds [fd].head);
202}
203
204/*****************************************************************************/
205
206static struct ev_timer **timers;
207static int timermax, timercnt;
208
209static struct ev_periodic **periodics;
210static int periodicmax, periodiccnt;
211
212static void
213upheap (WT *timers, int k)
214{
215 WT w = timers [k];
216
217 while (k && timers [k >> 1]->at > w->at)
218 {
219 timers [k] = timers [k >> 1];
220 timers [k]->active = k + 1;
221 k >>= 1;
222 }
223
224 timers [k] = w;
225 timers [k]->active = k + 1;
226
227}
228
229static void
230downheap (WT *timers, int N, int k)
231{
232 WT w = timers [k];
233
234 while (k < (N >> 1))
235 {
236 int j = k << 1;
237
238 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
239 ++j;
240
241 if (w->at <= timers [j]->at)
242 break;
243
244 timers [k] = timers [j];
245 timers [k]->active = k + 1;
246 k = j;
247 }
248
249 timers [k] = w;
250 timers [k]->active = k + 1;
251}
252
253/*****************************************************************************/
254
255typedef struct
256{
257 struct ev_signal *head;
258 sig_atomic_t gotsig;
259} ANSIG; 806} ANSIG;
260 807
261static ANSIG *signals; 808static ANSIG *signals;
262static int signalmax; 809static int signalmax;
263 810
264static int sigpipe [2]; 811static EV_ATOMIC_T gotsig;
265static sig_atomic_t gotsig;
266static struct ev_io sigev;
267 812
268static void 813void inline_size
269signals_init (ANSIG *base, int count) 814signals_init (ANSIG *base, int count)
270{ 815{
271 while (count--) 816 while (count--)
272 { 817 {
273 base->head = 0; 818 base->head = 0;
274 base->gotsig = 0; 819 base->gotsig = 0;
820
275 ++base; 821 ++base;
276 } 822 }
277} 823}
278 824
825/*****************************************************************************/
826
827void inline_speed
828fd_intern (int fd)
829{
830#ifdef _WIN32
831 int arg = 1;
832 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
833#else
834 fcntl (fd, F_SETFD, FD_CLOEXEC);
835 fcntl (fd, F_SETFL, O_NONBLOCK);
836#endif
837}
838
839static void noinline
840evpipe_init (EV_P)
841{
842 if (!ev_is_active (&pipeev))
843 {
844#if EV_USE_EVENTFD
845 if ((evfd = eventfd (0, 0)) >= 0)
846 {
847 evpipe [0] = -1;
848 fd_intern (evfd);
849 ev_io_set (&pipeev, evfd, EV_READ);
850 }
851 else
852#endif
853 {
854 while (pipe (evpipe))
855 syserr ("(libev) error creating signal/async pipe");
856
857 fd_intern (evpipe [0]);
858 fd_intern (evpipe [1]);
859 ev_io_set (&pipeev, evpipe [0], EV_READ);
860 }
861
862 ev_io_start (EV_A_ &pipeev);
863 ev_unref (EV_A); /* watcher should not keep loop alive */
864 }
865}
866
867void inline_size
868evpipe_write (EV_P_ EV_ATOMIC_T *flag)
869{
870 if (!*flag)
871 {
872 int old_errno = errno; /* save errno because write might clobber it */
873
874 *flag = 1;
875
876#if EV_USE_EVENTFD
877 if (evfd >= 0)
878 {
879 uint64_t counter = 1;
880 write (evfd, &counter, sizeof (uint64_t));
881 }
882 else
883#endif
884 write (evpipe [1], &old_errno, 1);
885
886 errno = old_errno;
887 }
888}
889
279static void 890static void
891pipecb (EV_P_ ev_io *iow, int revents)
892{
893#if EV_USE_EVENTFD
894 if (evfd >= 0)
895 {
896 uint64_t counter = 1;
897 read (evfd, &counter, sizeof (uint64_t));
898 }
899 else
900#endif
901 {
902 char dummy;
903 read (evpipe [0], &dummy, 1);
904 }
905
906 if (gotsig && ev_is_default_loop (EV_A))
907 {
908 int signum;
909 gotsig = 0;
910
911 for (signum = signalmax; signum--; )
912 if (signals [signum].gotsig)
913 ev_feed_signal_event (EV_A_ signum + 1);
914 }
915
916#if EV_ASYNC_ENABLE
917 if (gotasync)
918 {
919 int i;
920 gotasync = 0;
921
922 for (i = asynccnt; i--; )
923 if (asyncs [i]->sent)
924 {
925 asyncs [i]->sent = 0;
926 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
927 }
928 }
929#endif
930}
931
932/*****************************************************************************/
933
934static void
280sighandler (int signum) 935ev_sighandler (int signum)
281{ 936{
937#if EV_MULTIPLICITY
938 struct ev_loop *loop = &default_loop_struct;
939#endif
940
941#if _WIN32
942 signal (signum, ev_sighandler);
943#endif
944
282 signals [signum - 1].gotsig = 1; 945 signals [signum - 1].gotsig = 1;
946 evpipe_write (EV_A_ &gotsig);
947}
283 948
284 if (!gotsig) 949void noinline
950ev_feed_signal_event (EV_P_ int signum)
951{
952 WL w;
953
954#if EV_MULTIPLICITY
955 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
956#endif
957
958 --signum;
959
960 if (signum < 0 || signum >= signalmax)
961 return;
962
963 signals [signum].gotsig = 0;
964
965 for (w = signals [signum].head; w; w = w->next)
966 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
967}
968
969/*****************************************************************************/
970
971static WL childs [EV_PID_HASHSIZE];
972
973#ifndef _WIN32
974
975static ev_signal childev;
976
977#ifndef WIFCONTINUED
978# define WIFCONTINUED(status) 0
979#endif
980
981void inline_speed
982child_reap (EV_P_ int chain, int pid, int status)
983{
984 ev_child *w;
985 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
986
987 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
988 {
989 if ((w->pid == pid || !w->pid)
990 && (!traced || (w->flags & 1)))
991 {
992 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
993 w->rpid = pid;
994 w->rstatus = status;
995 ev_feed_event (EV_A_ (W)w, EV_CHILD);
996 }
997 }
998}
999
1000#ifndef WCONTINUED
1001# define WCONTINUED 0
1002#endif
1003
1004static void
1005childcb (EV_P_ ev_signal *sw, int revents)
1006{
1007 int pid, status;
1008
1009 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1010 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1011 if (!WCONTINUED
1012 || errno != EINVAL
1013 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1014 return;
1015
1016 /* make sure we are called again until all children have been reaped */
1017 /* we need to do it this way so that the callback gets called before we continue */
1018 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1019
1020 child_reap (EV_A_ pid, pid, status);
1021 if (EV_PID_HASHSIZE > 1)
1022 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1023}
1024
1025#endif
1026
1027/*****************************************************************************/
1028
1029#if EV_USE_PORT
1030# include "ev_port.c"
1031#endif
1032#if EV_USE_KQUEUE
1033# include "ev_kqueue.c"
1034#endif
1035#if EV_USE_EPOLL
1036# include "ev_epoll.c"
1037#endif
1038#if EV_USE_POLL
1039# include "ev_poll.c"
1040#endif
1041#if EV_USE_SELECT
1042# include "ev_select.c"
1043#endif
1044
1045int
1046ev_version_major (void)
1047{
1048 return EV_VERSION_MAJOR;
1049}
1050
1051int
1052ev_version_minor (void)
1053{
1054 return EV_VERSION_MINOR;
1055}
1056
1057/* return true if we are running with elevated privileges and should ignore env variables */
1058int inline_size
1059enable_secure (void)
1060{
1061#ifdef _WIN32
1062 return 0;
1063#else
1064 return getuid () != geteuid ()
1065 || getgid () != getegid ();
1066#endif
1067}
1068
1069unsigned int
1070ev_supported_backends (void)
1071{
1072 unsigned int flags = 0;
1073
1074 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1075 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1076 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1077 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1078 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1079
1080 return flags;
1081}
1082
1083unsigned int
1084ev_recommended_backends (void)
1085{
1086 unsigned int flags = ev_supported_backends ();
1087
1088#ifndef __NetBSD__
1089 /* kqueue is borked on everything but netbsd apparently */
1090 /* it usually doesn't work correctly on anything but sockets and pipes */
1091 flags &= ~EVBACKEND_KQUEUE;
1092#endif
1093#ifdef __APPLE__
1094 // flags &= ~EVBACKEND_KQUEUE; for documentation
1095 flags &= ~EVBACKEND_POLL;
1096#endif
1097
1098 return flags;
1099}
1100
1101unsigned int
1102ev_embeddable_backends (void)
1103{
1104 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1105
1106 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1107 /* please fix it and tell me how to detect the fix */
1108 flags &= ~EVBACKEND_EPOLL;
1109
1110 return flags;
1111}
1112
1113unsigned int
1114ev_backend (EV_P)
1115{
1116 return backend;
1117}
1118
1119unsigned int
1120ev_loop_count (EV_P)
1121{
1122 return loop_count;
1123}
1124
1125void
1126ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1127{
1128 io_blocktime = interval;
1129}
1130
1131void
1132ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1133{
1134 timeout_blocktime = interval;
1135}
1136
1137static void noinline
1138loop_init (EV_P_ unsigned int flags)
1139{
1140 if (!backend)
1141 {
1142#if EV_USE_MONOTONIC
285 { 1143 {
1144 struct timespec ts;
1145 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1146 have_monotonic = 1;
1147 }
1148#endif
1149
1150 ev_rt_now = ev_time ();
1151 mn_now = get_clock ();
1152 now_floor = mn_now;
1153 rtmn_diff = ev_rt_now - mn_now;
1154
1155 io_blocktime = 0.;
1156 timeout_blocktime = 0.;
1157 backend = 0;
1158 backend_fd = -1;
1159 gotasync = 0;
1160#if EV_USE_INOTIFY
1161 fs_fd = -2;
1162#endif
1163
1164 /* pid check not overridable via env */
1165#ifndef _WIN32
1166 if (flags & EVFLAG_FORKCHECK)
1167 curpid = getpid ();
1168#endif
1169
1170 if (!(flags & EVFLAG_NOENV)
1171 && !enable_secure ()
1172 && getenv ("LIBEV_FLAGS"))
1173 flags = atoi (getenv ("LIBEV_FLAGS"));
1174
1175 if (!(flags & 0x0000ffffUL))
1176 flags |= ev_recommended_backends ();
1177
1178#if EV_USE_PORT
1179 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1180#endif
1181#if EV_USE_KQUEUE
1182 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1183#endif
1184#if EV_USE_EPOLL
1185 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1186#endif
1187#if EV_USE_POLL
1188 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1189#endif
1190#if EV_USE_SELECT
1191 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1192#endif
1193
1194 ev_init (&pipeev, pipecb);
1195 ev_set_priority (&pipeev, EV_MAXPRI);
1196 }
1197}
1198
1199static void noinline
1200loop_destroy (EV_P)
1201{
1202 int i;
1203
1204 if (ev_is_active (&pipeev))
1205 {
1206 ev_ref (EV_A); /* signal watcher */
1207 ev_io_stop (EV_A_ &pipeev);
1208
1209#if EV_USE_EVENTFD
1210 if (evfd >= 0)
1211 close (evfd);
1212#endif
1213
1214 if (evpipe [0] >= 0)
1215 {
1216 close (evpipe [0]);
1217 close (evpipe [1]);
1218 }
1219 }
1220
1221#if EV_USE_INOTIFY
1222 if (fs_fd >= 0)
1223 close (fs_fd);
1224#endif
1225
1226 if (backend_fd >= 0)
1227 close (backend_fd);
1228
1229#if EV_USE_PORT
1230 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1231#endif
1232#if EV_USE_KQUEUE
1233 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1234#endif
1235#if EV_USE_EPOLL
1236 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1237#endif
1238#if EV_USE_POLL
1239 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1240#endif
1241#if EV_USE_SELECT
1242 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1243#endif
1244
1245 for (i = NUMPRI; i--; )
1246 {
1247 array_free (pending, [i]);
1248#if EV_IDLE_ENABLE
1249 array_free (idle, [i]);
1250#endif
1251 }
1252
1253 ev_free (anfds); anfdmax = 0;
1254
1255 /* have to use the microsoft-never-gets-it-right macro */
1256 array_free (fdchange, EMPTY);
1257 array_free (timer, EMPTY);
1258#if EV_PERIODIC_ENABLE
1259 array_free (periodic, EMPTY);
1260#endif
1261#if EV_FORK_ENABLE
1262 array_free (fork, EMPTY);
1263#endif
1264 array_free (prepare, EMPTY);
1265 array_free (check, EMPTY);
1266#if EV_ASYNC_ENABLE
1267 array_free (async, EMPTY);
1268#endif
1269
1270 backend = 0;
1271}
1272
1273void inline_size infy_fork (EV_P);
1274
1275void inline_size
1276loop_fork (EV_P)
1277{
1278#if EV_USE_PORT
1279 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1280#endif
1281#if EV_USE_KQUEUE
1282 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1283#endif
1284#if EV_USE_EPOLL
1285 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1286#endif
1287#if EV_USE_INOTIFY
1288 infy_fork (EV_A);
1289#endif
1290
1291 if (ev_is_active (&pipeev))
1292 {
1293 /* this "locks" the handlers against writing to the pipe */
1294 /* while we modify the fd vars */
286 gotsig = 1; 1295 gotsig = 1;
287 write (sigpipe [1], &gotsig, 1); 1296#if EV_ASYNC_ENABLE
1297 gotasync = 1;
1298#endif
1299
1300 ev_ref (EV_A);
1301 ev_io_stop (EV_A_ &pipeev);
1302
1303#if EV_USE_EVENTFD
1304 if (evfd >= 0)
1305 close (evfd);
1306#endif
1307
1308 if (evpipe [0] >= 0)
1309 {
1310 close (evpipe [0]);
1311 close (evpipe [1]);
1312 }
1313
1314 evpipe_init (EV_A);
1315 /* now iterate over everything, in case we missed something */
1316 pipecb (EV_A_ &pipeev, EV_READ);
1317 }
1318
1319 postfork = 0;
1320}
1321
1322#if EV_MULTIPLICITY
1323struct ev_loop *
1324ev_loop_new (unsigned int flags)
1325{
1326 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1327
1328 memset (loop, 0, sizeof (struct ev_loop));
1329
1330 loop_init (EV_A_ flags);
1331
1332 if (ev_backend (EV_A))
1333 return loop;
1334
1335 return 0;
1336}
1337
1338void
1339ev_loop_destroy (EV_P)
1340{
1341 loop_destroy (EV_A);
1342 ev_free (loop);
1343}
1344
1345void
1346ev_loop_fork (EV_P)
1347{
1348 postfork = 1; /* must be in line with ev_default_fork */
1349}
1350
1351#endif
1352
1353#if EV_MULTIPLICITY
1354struct ev_loop *
1355ev_default_loop_init (unsigned int flags)
1356#else
1357int
1358ev_default_loop (unsigned int flags)
1359#endif
1360{
1361 if (!ev_default_loop_ptr)
288 } 1362 {
289} 1363#if EV_MULTIPLICITY
1364 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1365#else
1366 ev_default_loop_ptr = 1;
1367#endif
290 1368
291static void 1369 loop_init (EV_A_ flags);
292sigcb (struct ev_io *iow, int revents) 1370
1371 if (ev_backend (EV_A))
1372 {
1373#ifndef _WIN32
1374 ev_signal_init (&childev, childcb, SIGCHLD);
1375 ev_set_priority (&childev, EV_MAXPRI);
1376 ev_signal_start (EV_A_ &childev);
1377 ev_unref (EV_A); /* child watcher should not keep loop alive */
1378#endif
1379 }
1380 else
1381 ev_default_loop_ptr = 0;
1382 }
1383
1384 return ev_default_loop_ptr;
1385}
1386
1387void
1388ev_default_destroy (void)
293{ 1389{
294 struct ev_signal *w; 1390#if EV_MULTIPLICITY
1391 struct ev_loop *loop = ev_default_loop_ptr;
1392#endif
1393
1394#ifndef _WIN32
1395 ev_ref (EV_A); /* child watcher */
1396 ev_signal_stop (EV_A_ &childev);
1397#endif
1398
1399 loop_destroy (EV_A);
1400}
1401
1402void
1403ev_default_fork (void)
1404{
1405#if EV_MULTIPLICITY
1406 struct ev_loop *loop = ev_default_loop_ptr;
1407#endif
1408
1409 if (backend)
1410 postfork = 1; /* must be in line with ev_loop_fork */
1411}
1412
1413/*****************************************************************************/
1414
1415void
1416ev_invoke (EV_P_ void *w, int revents)
1417{
1418 EV_CB_INVOKE ((W)w, revents);
1419}
1420
1421void inline_speed
1422call_pending (EV_P)
1423{
295 int sig; 1424 int pri;
296 1425
297 gotsig = 0; 1426 for (pri = NUMPRI; pri--; )
298 read (sigpipe [0], &revents, 1); 1427 while (pendingcnt [pri])
299
300 for (sig = signalmax; sig--; )
301 if (signals [sig].gotsig)
302 { 1428 {
303 signals [sig].gotsig = 0; 1429 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
304 1430
305 for (w = signals [sig].head; w; w = w->next) 1431 if (expect_true (p->w))
306 event ((W)w, EV_SIGNAL); 1432 {
1433 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1434
1435 p->w->pending = 0;
1436 EV_CB_INVOKE (p->w, p->events);
1437 }
307 } 1438 }
308} 1439}
309 1440
310static void 1441void inline_size
311siginit (void)
312{
313 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315
316 /* rather than sort out wether we really need nb, set it */
317 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
319
320 evio_set (&sigev, sigpipe [0], EV_READ);
321 evio_start (&sigev);
322}
323
324/*****************************************************************************/
325
326static struct ev_idle **idles;
327static int idlemax, idlecnt;
328
329static struct ev_prepare **prepares;
330static int preparemax, preparecnt;
331
332static struct ev_check **checks;
333static int checkmax, checkcnt;
334
335/*****************************************************************************/
336
337#if HAVE_EPOLL
338# include "ev_epoll.c"
339#endif
340#if HAVE_SELECT
341# include "ev_select.c"
342#endif
343
344int ev_init (int flags)
345{
346#if HAVE_MONOTONIC
347 {
348 struct timespec ts;
349 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
350 have_monotonic = 1;
351 }
352#endif
353
354 ev_now = ev_time ();
355 now = get_clock ();
356 diff = ev_now - now;
357
358 if (pipe (sigpipe))
359 return 0;
360
361 ev_method = EVMETHOD_NONE;
362#if HAVE_EPOLL
363 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
364#endif
365#if HAVE_SELECT
366 if (ev_method == EVMETHOD_NONE) select_init (flags);
367#endif
368
369 if (ev_method)
370 {
371 evw_init (&sigev, sigcb);
372 siginit ();
373 }
374
375 return ev_method;
376}
377
378/*****************************************************************************/
379
380void ev_prefork (void)
381{
382 /* nop */
383}
384
385void ev_postfork_parent (void)
386{
387 /* nop */
388}
389
390void ev_postfork_child (void)
391{
392#if HAVE_EPOLL
393 if (ev_method == EVMETHOD_EPOLL)
394 epoll_postfork_child ();
395#endif
396
397 evio_stop (&sigev);
398 close (sigpipe [0]);
399 close (sigpipe [1]);
400 pipe (sigpipe);
401 siginit ();
402}
403
404/*****************************************************************************/
405
406static void
407fd_reify (void)
408{
409 int i;
410
411 for (i = 0; i < fdchangecnt; ++i)
412 {
413 int fd = fdchanges [i];
414 ANFD *anfd = anfds + fd;
415 struct ev_io *w;
416
417 int wev = 0;
418
419 for (w = anfd->head; w; w = w->next)
420 wev |= w->events;
421
422 if (anfd->wev != wev)
423 {
424 method_modify (fd, anfd->wev, wev);
425 anfd->wev = wev;
426 }
427 }
428
429 fdchangecnt = 0;
430}
431
432static void
433call_pending ()
434{
435 while (pendingcnt)
436 {
437 ANPENDING *p = pendings + --pendingcnt;
438
439 if (p->w)
440 {
441 p->w->pending = 0;
442 p->w->cb (p->w, p->events);
443 }
444 }
445}
446
447static void
448timers_reify () 1442timers_reify (EV_P)
449{ 1443{
450 while (timercnt && timers [0]->at <= now) 1444 while (timercnt && ((WT)timers [0])->at <= mn_now)
451 { 1445 {
452 struct ev_timer *w = timers [0]; 1446 ev_timer *w = (ev_timer *)timers [0];
453 1447
454 event ((W)w, EV_TIMEOUT); 1448 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
455 1449
456 /* first reschedule or stop timer */ 1450 /* first reschedule or stop timer */
457 if (w->repeat) 1451 if (w->repeat)
458 { 1452 {
1453 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1454
459 w->at = now + w->repeat; 1455 ((WT)w)->at += w->repeat;
460 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1456 if (((WT)w)->at < mn_now)
1457 ((WT)w)->at = mn_now;
1458
461 downheap ((WT *)timers, timercnt, 0); 1459 downheap (timers, timercnt, 0);
462 } 1460 }
463 else 1461 else
464 evtimer_stop (w); /* nonrepeating: stop timer */ 1462 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
465 }
466}
467 1463
468static void 1464 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1465 }
1466}
1467
1468#if EV_PERIODIC_ENABLE
1469void inline_size
469periodics_reify () 1470periodics_reify (EV_P)
470{ 1471{
471 while (periodiccnt && periodics [0]->at <= ev_now) 1472 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
472 { 1473 {
473 struct ev_periodic *w = periodics [0]; 1474 ev_periodic *w = (ev_periodic *)periodics [0];
1475
1476 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
474 1477
475 /* first reschedule or stop timer */ 1478 /* first reschedule or stop timer */
476 if (w->interval) 1479 if (w->reschedule_cb)
477 { 1480 {
478 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1481 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
479 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1482 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
480 downheap ((WT *)periodics, periodiccnt, 0); 1483 downheap (periodics, periodiccnt, 0);
1484 }
1485 else if (w->interval)
1486 {
1487 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1488 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1489 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1490 downheap (periodics, periodiccnt, 0);
481 } 1491 }
482 else 1492 else
483 evperiodic_stop (w); /* nonrepeating: stop timer */ 1493 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
484 1494
485 event ((W)w, EV_TIMEOUT); 1495 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
486 } 1496 }
487} 1497}
488 1498
489static void 1499static void noinline
490periodics_reschedule (ev_tstamp diff) 1500periodics_reschedule (EV_P)
491{ 1501{
492 int i; 1502 int i;
493 1503
494 /* adjust periodics after time jump */ 1504 /* adjust periodics after time jump */
495 for (i = 0; i < periodiccnt; ++i) 1505 for (i = 0; i < periodiccnt; ++i)
496 { 1506 {
497 struct ev_periodic *w = periodics [i]; 1507 ev_periodic *w = (ev_periodic *)periodics [i];
498 1508
1509 if (w->reschedule_cb)
1510 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
499 if (w->interval) 1511 else if (w->interval)
1512 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1513 }
1514
1515 /* now rebuild the heap */
1516 for (i = periodiccnt >> 1; i--; )
1517 downheap (periodics, periodiccnt, i);
1518}
1519#endif
1520
1521#if EV_IDLE_ENABLE
1522void inline_size
1523idle_reify (EV_P)
1524{
1525 if (expect_false (idleall))
1526 {
1527 int pri;
1528
1529 for (pri = NUMPRI; pri--; )
500 { 1530 {
501 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1531 if (pendingcnt [pri])
1532 break;
502 1533
503 if (fabs (diff) >= 1e-4) 1534 if (idlecnt [pri])
504 { 1535 {
505 evperiodic_stop (w); 1536 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
506 evperiodic_start (w); 1537 break;
507
508 i = 0; /* restart loop, inefficient, but time jumps should be rare */
509 } 1538 }
510 } 1539 }
511 } 1540 }
512} 1541}
1542#endif
513 1543
514static void 1544void inline_speed
515time_update () 1545time_update (EV_P_ ev_tstamp max_block)
516{ 1546{
517 int i; 1547 int i;
518 1548
519 ev_now = ev_time (); 1549#if EV_USE_MONOTONIC
520
521 if (have_monotonic) 1550 if (expect_true (have_monotonic))
522 { 1551 {
523 ev_tstamp odiff = diff; 1552 ev_tstamp odiff = rtmn_diff;
524 1553
525 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1554 mn_now = get_clock ();
1555
1556 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1557 /* interpolate in the meantime */
1558 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
526 { 1559 {
527 now = get_clock (); 1560 ev_rt_now = rtmn_diff + mn_now;
1561 return;
1562 }
1563
1564 now_floor = mn_now;
1565 ev_rt_now = ev_time ();
1566
1567 /* loop a few times, before making important decisions.
1568 * on the choice of "4": one iteration isn't enough,
1569 * in case we get preempted during the calls to
1570 * ev_time and get_clock. a second call is almost guaranteed
1571 * to succeed in that case, though. and looping a few more times
1572 * doesn't hurt either as we only do this on time-jumps or
1573 * in the unlikely event of having been preempted here.
1574 */
1575 for (i = 4; --i; )
1576 {
528 diff = ev_now - now; 1577 rtmn_diff = ev_rt_now - mn_now;
529 1578
530 if (fabs (odiff - diff) < MIN_TIMEJUMP) 1579 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
531 return; /* all is well */ 1580 return; /* all is well */
532 1581
533 ev_now = ev_time (); 1582 ev_rt_now = ev_time ();
1583 mn_now = get_clock ();
1584 now_floor = mn_now;
534 } 1585 }
535 1586
1587# if EV_PERIODIC_ENABLE
536 periodics_reschedule (diff - odiff); 1588 periodics_reschedule (EV_A);
1589# endif
537 /* no timer adjustment, as the monotonic clock doesn't jump */ 1590 /* no timer adjustment, as the monotonic clock doesn't jump */
1591 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
538 } 1592 }
539 else 1593 else
1594#endif
540 { 1595 {
541 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 1596 ev_rt_now = ev_time ();
1597
1598 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
542 { 1599 {
1600#if EV_PERIODIC_ENABLE
543 periodics_reschedule (ev_now - now); 1601 periodics_reschedule (EV_A);
544 1602#endif
545 /* adjust timers. this is easy, as the offset is the same for all */ 1603 /* adjust timers. this is easy, as the offset is the same for all of them */
546 for (i = 0; i < timercnt; ++i) 1604 for (i = 0; i < timercnt; ++i)
547 timers [i]->at += diff; 1605 ((WT)timers [i])->at += ev_rt_now - mn_now;
548 } 1606 }
549 1607
550 now = ev_now; 1608 mn_now = ev_rt_now;
551 } 1609 }
552} 1610}
553 1611
554int ev_loop_done; 1612void
1613ev_ref (EV_P)
1614{
1615 ++activecnt;
1616}
555 1617
1618void
1619ev_unref (EV_P)
1620{
1621 --activecnt;
1622}
1623
1624static int loop_done;
1625
1626void
556void ev_loop (int flags) 1627ev_loop (EV_P_ int flags)
557{ 1628{
558 double block; 1629 loop_done = EVUNLOOP_CANCEL;
559 ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0; 1630
1631 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
560 1632
561 do 1633 do
562 { 1634 {
1635#ifndef _WIN32
1636 if (expect_false (curpid)) /* penalise the forking check even more */
1637 if (expect_false (getpid () != curpid))
1638 {
1639 curpid = getpid ();
1640 postfork = 1;
1641 }
1642#endif
1643
1644#if EV_FORK_ENABLE
1645 /* we might have forked, so queue fork handlers */
1646 if (expect_false (postfork))
1647 if (forkcnt)
1648 {
1649 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1650 call_pending (EV_A);
1651 }
1652#endif
1653
563 /* queue check watchers (and execute them) */ 1654 /* queue prepare watchers (and execute them) */
564 if (preparecnt) 1655 if (expect_false (preparecnt))
565 { 1656 {
566 queue_events ((W *)prepares, preparecnt, EV_PREPARE); 1657 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
567 call_pending (); 1658 call_pending (EV_A);
568 } 1659 }
569 1660
1661 if (expect_false (!activecnt))
1662 break;
1663
1664 /* we might have forked, so reify kernel state if necessary */
1665 if (expect_false (postfork))
1666 loop_fork (EV_A);
1667
570 /* update fd-related kernel structures */ 1668 /* update fd-related kernel structures */
571 fd_reify (); 1669 fd_reify (EV_A);
572 1670
573 /* calculate blocking time */ 1671 /* calculate blocking time */
1672 {
1673 ev_tstamp waittime = 0.;
1674 ev_tstamp sleeptime = 0.;
574 1675
575 /* we only need this for !monotonic clockor timers, but as we basically 1676 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
576 always have timers, we just calculate it always */
577 ev_now = ev_time ();
578
579 if (flags & EVLOOP_NONBLOCK || idlecnt)
580 block = 0.;
581 else
582 { 1677 {
1678 /* update time to cancel out callback processing overhead */
1679 time_update (EV_A_ 1e100);
1680
583 block = MAX_BLOCKTIME; 1681 waittime = MAX_BLOCKTIME;
584 1682
585 if (timercnt) 1683 if (timercnt)
586 { 1684 {
587 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 1685 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
588 if (block > to) block = to; 1686 if (waittime > to) waittime = to;
589 } 1687 }
590 1688
1689#if EV_PERIODIC_ENABLE
591 if (periodiccnt) 1690 if (periodiccnt)
592 { 1691 {
593 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1692 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
594 if (block > to) block = to; 1693 if (waittime > to) waittime = to;
595 } 1694 }
1695#endif
596 1696
597 if (block < 0.) block = 0.; 1697 if (expect_false (waittime < timeout_blocktime))
1698 waittime = timeout_blocktime;
1699
1700 sleeptime = waittime - backend_fudge;
1701
1702 if (expect_true (sleeptime > io_blocktime))
1703 sleeptime = io_blocktime;
1704
1705 if (sleeptime)
1706 {
1707 ev_sleep (sleeptime);
1708 waittime -= sleeptime;
1709 }
598 } 1710 }
599 1711
600 method_poll (block); 1712 ++loop_count;
1713 backend_poll (EV_A_ waittime);
601 1714
602 /* update ev_now, do magic */ 1715 /* update ev_rt_now, do magic */
603 time_update (); 1716 time_update (EV_A_ waittime + sleeptime);
1717 }
604 1718
605 /* queue pending timers and reschedule them */ 1719 /* queue pending timers and reschedule them */
606 timers_reify (); /* relative timers called last */ 1720 timers_reify (EV_A); /* relative timers called last */
1721#if EV_PERIODIC_ENABLE
607 periodics_reify (); /* absolute timers called first */ 1722 periodics_reify (EV_A); /* absolute timers called first */
1723#endif
608 1724
1725#if EV_IDLE_ENABLE
609 /* queue idle watchers unless io or timers are pending */ 1726 /* queue idle watchers unless other events are pending */
610 if (!pendingcnt) 1727 idle_reify (EV_A);
611 queue_events ((W *)idles, idlecnt, EV_IDLE); 1728#endif
612 1729
613 /* queue check watchers, to be executed first */ 1730 /* queue check watchers, to be executed first */
614 if (checkcnt) 1731 if (expect_false (checkcnt))
615 queue_events ((W *)checks, checkcnt, EV_CHECK); 1732 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
616 1733
617 call_pending (); 1734 call_pending (EV_A);
618 } 1735 }
619 while (!ev_loop_done); 1736 while (expect_true (
1737 activecnt
1738 && !loop_done
1739 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1740 ));
620 1741
621 if (ev_loop_done != 2) 1742 if (loop_done == EVUNLOOP_ONE)
1743 loop_done = EVUNLOOP_CANCEL;
1744}
1745
1746void
1747ev_unloop (EV_P_ int how)
1748{
622 ev_loop_done = 0; 1749 loop_done = how;
623} 1750}
624 1751
625/*****************************************************************************/ 1752/*****************************************************************************/
626 1753
627static void 1754void inline_size
628wlist_add (WL *head, WL elem) 1755wlist_add (WL *head, WL elem)
629{ 1756{
630 elem->next = *head; 1757 elem->next = *head;
631 *head = elem; 1758 *head = elem;
632} 1759}
633 1760
634static void 1761void inline_size
635wlist_del (WL *head, WL elem) 1762wlist_del (WL *head, WL elem)
636{ 1763{
637 while (*head) 1764 while (*head)
638 { 1765 {
639 if (*head == elem) 1766 if (*head == elem)
… …
644 1771
645 head = &(*head)->next; 1772 head = &(*head)->next;
646 } 1773 }
647} 1774}
648 1775
649static void 1776void inline_speed
650ev_clear (W w) 1777clear_pending (EV_P_ W w)
651{ 1778{
652 if (w->pending) 1779 if (w->pending)
653 { 1780 {
654 pendings [w->pending - 1].w = 0; 1781 pendings [ABSPRI (w)][w->pending - 1].w = 0;
655 w->pending = 0; 1782 w->pending = 0;
656 } 1783 }
657} 1784}
658 1785
659static void 1786int
1787ev_clear_pending (EV_P_ void *w)
1788{
1789 W w_ = (W)w;
1790 int pending = w_->pending;
1791
1792 if (expect_true (pending))
1793 {
1794 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1795 w_->pending = 0;
1796 p->w = 0;
1797 return p->events;
1798 }
1799 else
1800 return 0;
1801}
1802
1803void inline_size
1804pri_adjust (EV_P_ W w)
1805{
1806 int pri = w->priority;
1807 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1808 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1809 w->priority = pri;
1810}
1811
1812void inline_speed
660ev_start (W w, int active) 1813ev_start (EV_P_ W w, int active)
661{ 1814{
1815 pri_adjust (EV_A_ w);
662 w->active = active; 1816 w->active = active;
1817 ev_ref (EV_A);
663} 1818}
664 1819
665static void 1820void inline_size
666ev_stop (W w) 1821ev_stop (EV_P_ W w)
667{ 1822{
1823 ev_unref (EV_A);
668 w->active = 0; 1824 w->active = 0;
669} 1825}
670 1826
671/*****************************************************************************/ 1827/*****************************************************************************/
672 1828
673void 1829void noinline
674evio_start (struct ev_io *w) 1830ev_io_start (EV_P_ ev_io *w)
675{ 1831{
676 if (ev_is_active (w))
677 return;
678
679 int fd = w->fd; 1832 int fd = w->fd;
680 1833
1834 if (expect_false (ev_is_active (w)))
1835 return;
1836
1837 assert (("ev_io_start called with negative fd", fd >= 0));
1838
681 ev_start ((W)w, 1); 1839 ev_start (EV_A_ (W)w, 1);
682 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1840 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
683 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1841 wlist_add (&anfds[fd].head, (WL)w);
684 1842
685 ++fdchangecnt; 1843 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
686 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1844 w->events &= ~EV_IOFDSET;
687 fdchanges [fdchangecnt - 1] = fd;
688} 1845}
689 1846
690void 1847void noinline
691evio_stop (struct ev_io *w) 1848ev_io_stop (EV_P_ ev_io *w)
692{ 1849{
693 ev_clear ((W)w); 1850 clear_pending (EV_A_ (W)w);
694 if (!ev_is_active (w)) 1851 if (expect_false (!ev_is_active (w)))
695 return; 1852 return;
696 1853
1854 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1855
697 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1856 wlist_del (&anfds[w->fd].head, (WL)w);
698 ev_stop ((W)w); 1857 ev_stop (EV_A_ (W)w);
699 1858
700 ++fdchangecnt; 1859 fd_change (EV_A_ w->fd, 1);
701 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
702 fdchanges [fdchangecnt - 1] = w->fd;
703} 1860}
704 1861
705void 1862void noinline
706evtimer_start (struct ev_timer *w) 1863ev_timer_start (EV_P_ ev_timer *w)
707{ 1864{
708 if (ev_is_active (w)) 1865 if (expect_false (ev_is_active (w)))
709 return; 1866 return;
710 1867
711 w->at += now; 1868 ((WT)w)->at += mn_now;
712 1869
713 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 1870 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
714 1871
715 ev_start ((W)w, ++timercnt); 1872 ev_start (EV_A_ (W)w, ++timercnt);
716 array_needsize (timers, timermax, timercnt, ); 1873 array_needsize (WT, timers, timermax, timercnt, EMPTY2);
717 timers [timercnt - 1] = w; 1874 timers [timercnt - 1] = (WT)w;
718 upheap ((WT *)timers, timercnt - 1); 1875 upheap (timers, timercnt - 1);
719}
720 1876
721void 1877 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
1878}
1879
1880void noinline
722evtimer_stop (struct ev_timer *w) 1881ev_timer_stop (EV_P_ ev_timer *w)
723{ 1882{
724 ev_clear ((W)w); 1883 clear_pending (EV_A_ (W)w);
725 if (!ev_is_active (w)) 1884 if (expect_false (!ev_is_active (w)))
726 return; 1885 return;
727 1886
728 if (w->active < timercnt--) 1887 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
1888
1889 {
1890 int active = ((W)w)->active;
1891
1892 if (expect_true (--active < --timercnt))
729 { 1893 {
730 timers [w->active - 1] = timers [timercnt]; 1894 timers [active] = timers [timercnt];
731 downheap ((WT *)timers, timercnt, w->active - 1); 1895 adjustheap (timers, timercnt, active);
732 } 1896 }
1897 }
733 1898
734 w->at = w->repeat; 1899 ((WT)w)->at -= mn_now;
735 1900
736 ev_stop ((W)w); 1901 ev_stop (EV_A_ (W)w);
737} 1902}
738 1903
739void 1904void noinline
740evtimer_again (struct ev_timer *w) 1905ev_timer_again (EV_P_ ev_timer *w)
741{ 1906{
742 if (ev_is_active (w)) 1907 if (ev_is_active (w))
743 { 1908 {
744 if (w->repeat) 1909 if (w->repeat)
745 { 1910 {
746 w->at = now + w->repeat; 1911 ((WT)w)->at = mn_now + w->repeat;
747 downheap ((WT *)timers, timercnt, w->active - 1); 1912 adjustheap (timers, timercnt, ((W)w)->active - 1);
748 } 1913 }
749 else 1914 else
750 evtimer_stop (w); 1915 ev_timer_stop (EV_A_ w);
751 } 1916 }
752 else if (w->repeat) 1917 else if (w->repeat)
1918 {
1919 w->at = w->repeat;
753 evtimer_start (w); 1920 ev_timer_start (EV_A_ w);
1921 }
754} 1922}
755 1923
756void 1924#if EV_PERIODIC_ENABLE
1925void noinline
757evperiodic_start (struct ev_periodic *w) 1926ev_periodic_start (EV_P_ ev_periodic *w)
758{ 1927{
759 if (ev_is_active (w)) 1928 if (expect_false (ev_is_active (w)))
760 return; 1929 return;
761 1930
762 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 1931 if (w->reschedule_cb)
763 1932 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1933 else if (w->interval)
1934 {
1935 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
764 /* this formula differs from the one in periodic_reify because we do not always round up */ 1936 /* this formula differs from the one in periodic_reify because we do not always round up */
765 if (w->interval)
766 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 1937 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1938 }
1939 else
1940 ((WT)w)->at = w->offset;
767 1941
768 ev_start ((W)w, ++periodiccnt); 1942 ev_start (EV_A_ (W)w, ++periodiccnt);
769 array_needsize (periodics, periodicmax, periodiccnt, ); 1943 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
770 periodics [periodiccnt - 1] = w; 1944 periodics [periodiccnt - 1] = (WT)w;
771 upheap ((WT *)periodics, periodiccnt - 1); 1945 upheap (periodics, periodiccnt - 1);
772}
773 1946
774void 1947 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
1948}
1949
1950void noinline
775evperiodic_stop (struct ev_periodic *w) 1951ev_periodic_stop (EV_P_ ev_periodic *w)
776{ 1952{
777 ev_clear ((W)w); 1953 clear_pending (EV_A_ (W)w);
778 if (!ev_is_active (w)) 1954 if (expect_false (!ev_is_active (w)))
779 return; 1955 return;
780 1956
781 if (w->active < periodiccnt--) 1957 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
1958
1959 {
1960 int active = ((W)w)->active;
1961
1962 if (expect_true (--active < --periodiccnt))
782 { 1963 {
783 periodics [w->active - 1] = periodics [periodiccnt]; 1964 periodics [active] = periodics [periodiccnt];
784 downheap ((WT *)periodics, periodiccnt, w->active - 1); 1965 adjustheap (periodics, periodiccnt, active);
785 } 1966 }
1967 }
786 1968
787 ev_stop ((W)w); 1969 ev_stop (EV_A_ (W)w);
788} 1970}
789 1971
790void 1972void noinline
1973ev_periodic_again (EV_P_ ev_periodic *w)
1974{
1975 /* TODO: use adjustheap and recalculation */
1976 ev_periodic_stop (EV_A_ w);
1977 ev_periodic_start (EV_A_ w);
1978}
1979#endif
1980
1981#ifndef SA_RESTART
1982# define SA_RESTART 0
1983#endif
1984
1985void noinline
791evsignal_start (struct ev_signal *w) 1986ev_signal_start (EV_P_ ev_signal *w)
792{ 1987{
1988#if EV_MULTIPLICITY
1989 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1990#endif
793 if (ev_is_active (w)) 1991 if (expect_false (ev_is_active (w)))
794 return; 1992 return;
795 1993
796 ev_start ((W)w, 1); 1994 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1995
1996 evpipe_init (EV_A);
1997
1998 {
1999#ifndef _WIN32
2000 sigset_t full, prev;
2001 sigfillset (&full);
2002 sigprocmask (SIG_SETMASK, &full, &prev);
2003#endif
2004
797 array_needsize (signals, signalmax, w->signum, signals_init); 2005 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2006
2007#ifndef _WIN32
2008 sigprocmask (SIG_SETMASK, &prev, 0);
2009#endif
2010 }
2011
2012 ev_start (EV_A_ (W)w, 1);
798 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2013 wlist_add (&signals [w->signum - 1].head, (WL)w);
799 2014
800 if (!w->next) 2015 if (!((WL)w)->next)
801 { 2016 {
2017#if _WIN32
2018 signal (w->signum, ev_sighandler);
2019#else
802 struct sigaction sa; 2020 struct sigaction sa;
803 sa.sa_handler = sighandler; 2021 sa.sa_handler = ev_sighandler;
804 sigfillset (&sa.sa_mask); 2022 sigfillset (&sa.sa_mask);
805 sa.sa_flags = 0; 2023 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
806 sigaction (w->signum, &sa, 0); 2024 sigaction (w->signum, &sa, 0);
2025#endif
807 } 2026 }
808} 2027}
809 2028
810void 2029void noinline
811evsignal_stop (struct ev_signal *w) 2030ev_signal_stop (EV_P_ ev_signal *w)
812{ 2031{
813 ev_clear ((W)w); 2032 clear_pending (EV_A_ (W)w);
814 if (!ev_is_active (w)) 2033 if (expect_false (!ev_is_active (w)))
815 return; 2034 return;
816 2035
817 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2036 wlist_del (&signals [w->signum - 1].head, (WL)w);
818 ev_stop ((W)w); 2037 ev_stop (EV_A_ (W)w);
819 2038
820 if (!signals [w->signum - 1].head) 2039 if (!signals [w->signum - 1].head)
821 signal (w->signum, SIG_DFL); 2040 signal (w->signum, SIG_DFL);
822} 2041}
823 2042
824void evidle_start (struct ev_idle *w) 2043void
2044ev_child_start (EV_P_ ev_child *w)
825{ 2045{
2046#if EV_MULTIPLICITY
2047 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2048#endif
826 if (ev_is_active (w)) 2049 if (expect_false (ev_is_active (w)))
827 return; 2050 return;
828 2051
829 ev_start ((W)w, ++idlecnt); 2052 ev_start (EV_A_ (W)w, 1);
830 array_needsize (idles, idlemax, idlecnt, ); 2053 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
831 idles [idlecnt - 1] = w;
832} 2054}
833 2055
834void evidle_stop (struct ev_idle *w) 2056void
2057ev_child_stop (EV_P_ ev_child *w)
835{ 2058{
836 ev_clear ((W)w); 2059 clear_pending (EV_A_ (W)w);
837 if (ev_is_active (w)) 2060 if (expect_false (!ev_is_active (w)))
838 return; 2061 return;
839 2062
840 idles [w->active - 1] = idles [--idlecnt]; 2063 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
841 ev_stop ((W)w); 2064 ev_stop (EV_A_ (W)w);
842} 2065}
843 2066
2067#if EV_STAT_ENABLE
2068
2069# ifdef _WIN32
2070# undef lstat
2071# define lstat(a,b) _stati64 (a,b)
2072# endif
2073
2074#define DEF_STAT_INTERVAL 5.0074891
2075#define MIN_STAT_INTERVAL 0.1074891
2076
2077static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2078
2079#if EV_USE_INOTIFY
2080# define EV_INOTIFY_BUFSIZE 8192
2081
2082static void noinline
2083infy_add (EV_P_ ev_stat *w)
2084{
2085 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);
2086
2087 if (w->wd < 0)
2088 {
2089 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2090
2091 /* monitor some parent directory for speedup hints */
2092 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2093 {
2094 char path [4096];
2095 strcpy (path, w->path);
2096
2097 do
2098 {
2099 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2100 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2101
2102 char *pend = strrchr (path, '/');
2103
2104 if (!pend)
2105 break; /* whoops, no '/', complain to your admin */
2106
2107 *pend = 0;
2108 w->wd = inotify_add_watch (fs_fd, path, mask);
2109 }
2110 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2111 }
2112 }
2113 else
2114 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2115
2116 if (w->wd >= 0)
2117 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2118}
2119
2120static void noinline
2121infy_del (EV_P_ ev_stat *w)
2122{
2123 int slot;
2124 int wd = w->wd;
2125
2126 if (wd < 0)
2127 return;
2128
2129 w->wd = -2;
2130 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2131 wlist_del (&fs_hash [slot].head, (WL)w);
2132
2133 /* remove this watcher, if others are watching it, they will rearm */
2134 inotify_rm_watch (fs_fd, wd);
2135}
2136
2137static void noinline
2138infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2139{
2140 if (slot < 0)
2141 /* overflow, need to check for all hahs slots */
2142 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2143 infy_wd (EV_A_ slot, wd, ev);
2144 else
2145 {
2146 WL w_;
2147
2148 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2149 {
2150 ev_stat *w = (ev_stat *)w_;
2151 w_ = w_->next; /* lets us remove this watcher and all before it */
2152
2153 if (w->wd == wd || wd == -1)
2154 {
2155 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2156 {
2157 w->wd = -1;
2158 infy_add (EV_A_ w); /* re-add, no matter what */
2159 }
2160
2161 stat_timer_cb (EV_A_ &w->timer, 0);
2162 }
2163 }
2164 }
2165}
2166
2167static void
2168infy_cb (EV_P_ ev_io *w, int revents)
2169{
2170 char buf [EV_INOTIFY_BUFSIZE];
2171 struct inotify_event *ev = (struct inotify_event *)buf;
2172 int ofs;
2173 int len = read (fs_fd, buf, sizeof (buf));
2174
2175 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2176 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2177}
2178
2179void inline_size
2180infy_init (EV_P)
2181{
2182 if (fs_fd != -2)
2183 return;
2184
2185 fs_fd = inotify_init ();
2186
2187 if (fs_fd >= 0)
2188 {
2189 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2190 ev_set_priority (&fs_w, EV_MAXPRI);
2191 ev_io_start (EV_A_ &fs_w);
2192 }
2193}
2194
2195void inline_size
2196infy_fork (EV_P)
2197{
2198 int slot;
2199
2200 if (fs_fd < 0)
2201 return;
2202
2203 close (fs_fd);
2204 fs_fd = inotify_init ();
2205
2206 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2207 {
2208 WL w_ = fs_hash [slot].head;
2209 fs_hash [slot].head = 0;
2210
2211 while (w_)
2212 {
2213 ev_stat *w = (ev_stat *)w_;
2214 w_ = w_->next; /* lets us add this watcher */
2215
2216 w->wd = -1;
2217
2218 if (fs_fd >= 0)
2219 infy_add (EV_A_ w); /* re-add, no matter what */
2220 else
2221 ev_timer_start (EV_A_ &w->timer);
2222 }
2223
2224 }
2225}
2226
2227#endif
2228
2229void
2230ev_stat_stat (EV_P_ ev_stat *w)
2231{
2232 if (lstat (w->path, &w->attr) < 0)
2233 w->attr.st_nlink = 0;
2234 else if (!w->attr.st_nlink)
2235 w->attr.st_nlink = 1;
2236}
2237
2238static void noinline
2239stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2240{
2241 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2242
2243 /* we copy this here each the time so that */
2244 /* prev has the old value when the callback gets invoked */
2245 w->prev = w->attr;
2246 ev_stat_stat (EV_A_ w);
2247
2248 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2249 if (
2250 w->prev.st_dev != w->attr.st_dev
2251 || w->prev.st_ino != w->attr.st_ino
2252 || w->prev.st_mode != w->attr.st_mode
2253 || w->prev.st_nlink != w->attr.st_nlink
2254 || w->prev.st_uid != w->attr.st_uid
2255 || w->prev.st_gid != w->attr.st_gid
2256 || w->prev.st_rdev != w->attr.st_rdev
2257 || w->prev.st_size != w->attr.st_size
2258 || w->prev.st_atime != w->attr.st_atime
2259 || w->prev.st_mtime != w->attr.st_mtime
2260 || w->prev.st_ctime != w->attr.st_ctime
2261 ) {
2262 #if EV_USE_INOTIFY
2263 infy_del (EV_A_ w);
2264 infy_add (EV_A_ w);
2265 ev_stat_stat (EV_A_ w); /* avoid race... */
2266 #endif
2267
2268 ev_feed_event (EV_A_ w, EV_STAT);
2269 }
2270}
2271
2272void
2273ev_stat_start (EV_P_ ev_stat *w)
2274{
2275 if (expect_false (ev_is_active (w)))
2276 return;
2277
2278 /* since we use memcmp, we need to clear any padding data etc. */
2279 memset (&w->prev, 0, sizeof (ev_statdata));
2280 memset (&w->attr, 0, sizeof (ev_statdata));
2281
2282 ev_stat_stat (EV_A_ w);
2283
2284 if (w->interval < MIN_STAT_INTERVAL)
2285 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2286
2287 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2288 ev_set_priority (&w->timer, ev_priority (w));
2289
2290#if EV_USE_INOTIFY
2291 infy_init (EV_A);
2292
2293 if (fs_fd >= 0)
2294 infy_add (EV_A_ w);
2295 else
2296#endif
2297 ev_timer_start (EV_A_ &w->timer);
2298
2299 ev_start (EV_A_ (W)w, 1);
2300}
2301
2302void
2303ev_stat_stop (EV_P_ ev_stat *w)
2304{
2305 clear_pending (EV_A_ (W)w);
2306 if (expect_false (!ev_is_active (w)))
2307 return;
2308
2309#if EV_USE_INOTIFY
2310 infy_del (EV_A_ w);
2311#endif
2312 ev_timer_stop (EV_A_ &w->timer);
2313
2314 ev_stop (EV_A_ (W)w);
2315}
2316#endif
2317
2318#if EV_IDLE_ENABLE
2319void
2320ev_idle_start (EV_P_ ev_idle *w)
2321{
2322 if (expect_false (ev_is_active (w)))
2323 return;
2324
2325 pri_adjust (EV_A_ (W)w);
2326
2327 {
2328 int active = ++idlecnt [ABSPRI (w)];
2329
2330 ++idleall;
2331 ev_start (EV_A_ (W)w, active);
2332
2333 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2334 idles [ABSPRI (w)][active - 1] = w;
2335 }
2336}
2337
2338void
2339ev_idle_stop (EV_P_ ev_idle *w)
2340{
2341 clear_pending (EV_A_ (W)w);
2342 if (expect_false (!ev_is_active (w)))
2343 return;
2344
2345 {
2346 int active = ((W)w)->active;
2347
2348 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2349 ((W)idles [ABSPRI (w)][active - 1])->active = active;
2350
2351 ev_stop (EV_A_ (W)w);
2352 --idleall;
2353 }
2354}
2355#endif
2356
2357void
844void evprepare_start (struct ev_prepare *w) 2358ev_prepare_start (EV_P_ ev_prepare *w)
845{ 2359{
846 if (ev_is_active (w)) 2360 if (expect_false (ev_is_active (w)))
847 return; 2361 return;
848 2362
849 ev_start ((W)w, ++preparecnt); 2363 ev_start (EV_A_ (W)w, ++preparecnt);
850 array_needsize (prepares, preparemax, preparecnt, ); 2364 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
851 prepares [preparecnt - 1] = w; 2365 prepares [preparecnt - 1] = w;
852} 2366}
853 2367
2368void
854void evprepare_stop (struct ev_prepare *w) 2369ev_prepare_stop (EV_P_ ev_prepare *w)
855{ 2370{
856 ev_clear ((W)w); 2371 clear_pending (EV_A_ (W)w);
857 if (ev_is_active (w)) 2372 if (expect_false (!ev_is_active (w)))
858 return; 2373 return;
859 2374
2375 {
2376 int active = ((W)w)->active;
860 prepares [w->active - 1] = prepares [--preparecnt]; 2377 prepares [active - 1] = prepares [--preparecnt];
2378 ((W)prepares [active - 1])->active = active;
2379 }
2380
861 ev_stop ((W)w); 2381 ev_stop (EV_A_ (W)w);
862} 2382}
863 2383
2384void
864void evcheck_start (struct ev_check *w) 2385ev_check_start (EV_P_ ev_check *w)
865{ 2386{
866 if (ev_is_active (w)) 2387 if (expect_false (ev_is_active (w)))
867 return; 2388 return;
868 2389
869 ev_start ((W)w, ++checkcnt); 2390 ev_start (EV_A_ (W)w, ++checkcnt);
870 array_needsize (checks, checkmax, checkcnt, ); 2391 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
871 checks [checkcnt - 1] = w; 2392 checks [checkcnt - 1] = w;
872} 2393}
873 2394
2395void
874void evcheck_stop (struct ev_check *w) 2396ev_check_stop (EV_P_ ev_check *w)
875{ 2397{
876 ev_clear ((W)w); 2398 clear_pending (EV_A_ (W)w);
877 if (ev_is_active (w)) 2399 if (expect_false (!ev_is_active (w)))
878 return; 2400 return;
879 2401
2402 {
2403 int active = ((W)w)->active;
880 checks [w->active - 1] = checks [--checkcnt]; 2404 checks [active - 1] = checks [--checkcnt];
2405 ((W)checks [active - 1])->active = active;
2406 }
2407
881 ev_stop ((W)w); 2408 ev_stop (EV_A_ (W)w);
882} 2409}
2410
2411#if EV_EMBED_ENABLE
2412void noinline
2413ev_embed_sweep (EV_P_ ev_embed *w)
2414{
2415 ev_loop (w->other, EVLOOP_NONBLOCK);
2416}
2417
2418static void
2419embed_io_cb (EV_P_ ev_io *io, int revents)
2420{
2421 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2422
2423 if (ev_cb (w))
2424 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2425 else
2426 ev_loop (w->other, EVLOOP_NONBLOCK);
2427}
2428
2429static void
2430embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2431{
2432 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2433
2434 {
2435 struct ev_loop *loop = w->other;
2436
2437 while (fdchangecnt)
2438 {
2439 fd_reify (EV_A);
2440 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2441 }
2442 }
2443}
2444
2445#if 0
2446static void
2447embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2448{
2449 ev_idle_stop (EV_A_ idle);
2450}
2451#endif
2452
2453void
2454ev_embed_start (EV_P_ ev_embed *w)
2455{
2456 if (expect_false (ev_is_active (w)))
2457 return;
2458
2459 {
2460 struct ev_loop *loop = w->other;
2461 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2462 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2463 }
2464
2465 ev_set_priority (&w->io, ev_priority (w));
2466 ev_io_start (EV_A_ &w->io);
2467
2468 ev_prepare_init (&w->prepare, embed_prepare_cb);
2469 ev_set_priority (&w->prepare, EV_MINPRI);
2470 ev_prepare_start (EV_A_ &w->prepare);
2471
2472 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2473
2474 ev_start (EV_A_ (W)w, 1);
2475}
2476
2477void
2478ev_embed_stop (EV_P_ ev_embed *w)
2479{
2480 clear_pending (EV_A_ (W)w);
2481 if (expect_false (!ev_is_active (w)))
2482 return;
2483
2484 ev_io_stop (EV_A_ &w->io);
2485 ev_prepare_stop (EV_A_ &w->prepare);
2486
2487 ev_stop (EV_A_ (W)w);
2488}
2489#endif
2490
2491#if EV_FORK_ENABLE
2492void
2493ev_fork_start (EV_P_ ev_fork *w)
2494{
2495 if (expect_false (ev_is_active (w)))
2496 return;
2497
2498 ev_start (EV_A_ (W)w, ++forkcnt);
2499 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2500 forks [forkcnt - 1] = w;
2501}
2502
2503void
2504ev_fork_stop (EV_P_ ev_fork *w)
2505{
2506 clear_pending (EV_A_ (W)w);
2507 if (expect_false (!ev_is_active (w)))
2508 return;
2509
2510 {
2511 int active = ((W)w)->active;
2512 forks [active - 1] = forks [--forkcnt];
2513 ((W)forks [active - 1])->active = active;
2514 }
2515
2516 ev_stop (EV_A_ (W)w);
2517}
2518#endif
2519
2520#if EV_ASYNC_ENABLE
2521void
2522ev_async_start (EV_P_ ev_async *w)
2523{
2524 if (expect_false (ev_is_active (w)))
2525 return;
2526
2527 evpipe_init (EV_A);
2528
2529 ev_start (EV_A_ (W)w, ++asynccnt);
2530 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2531 asyncs [asynccnt - 1] = w;
2532}
2533
2534void
2535ev_async_stop (EV_P_ ev_async *w)
2536{
2537 clear_pending (EV_A_ (W)w);
2538 if (expect_false (!ev_is_active (w)))
2539 return;
2540
2541 {
2542 int active = ((W)w)->active;
2543 asyncs [active - 1] = asyncs [--asynccnt];
2544 ((W)asyncs [active - 1])->active = active;
2545 }
2546
2547 ev_stop (EV_A_ (W)w);
2548}
2549
2550void
2551ev_async_send (EV_P_ ev_async *w)
2552{
2553 w->sent = 1;
2554 evpipe_write (EV_A_ &gotasync);
2555}
2556#endif
883 2557
884/*****************************************************************************/ 2558/*****************************************************************************/
885 2559
886struct ev_once 2560struct ev_once
887{ 2561{
888 struct ev_io io; 2562 ev_io io;
889 struct ev_timer to; 2563 ev_timer to;
890 void (*cb)(int revents, void *arg); 2564 void (*cb)(int revents, void *arg);
891 void *arg; 2565 void *arg;
892}; 2566};
893 2567
894static void 2568static void
895once_cb (struct ev_once *once, int revents) 2569once_cb (EV_P_ struct ev_once *once, int revents)
896{ 2570{
897 void (*cb)(int revents, void *arg) = once->cb; 2571 void (*cb)(int revents, void *arg) = once->cb;
898 void *arg = once->arg; 2572 void *arg = once->arg;
899 2573
900 evio_stop (&once->io); 2574 ev_io_stop (EV_A_ &once->io);
901 evtimer_stop (&once->to); 2575 ev_timer_stop (EV_A_ &once->to);
902 free (once); 2576 ev_free (once);
903 2577
904 cb (revents, arg); 2578 cb (revents, arg);
905} 2579}
906 2580
907static void 2581static void
908once_cb_io (struct ev_io *w, int revents) 2582once_cb_io (EV_P_ ev_io *w, int revents)
909{ 2583{
910 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2584 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
911} 2585}
912 2586
913static void 2587static void
914once_cb_to (struct ev_timer *w, int revents) 2588once_cb_to (EV_P_ ev_timer *w, int revents)
915{ 2589{
916 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2590 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
917} 2591}
918 2592
919void 2593void
920ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2594ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
921{ 2595{
922 struct ev_once *once = malloc (sizeof (struct ev_once)); 2596 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
923 2597
924 if (!once) 2598 if (expect_false (!once))
925 cb (EV_ERROR, arg); 2599 {
926 else 2600 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
2601 return;
927 { 2602 }
2603
928 once->cb = cb; 2604 once->cb = cb;
929 once->arg = arg; 2605 once->arg = arg;
930 2606
931 evw_init (&once->io, once_cb_io); 2607 ev_init (&once->io, once_cb_io);
932
933 if (fd >= 0) 2608 if (fd >= 0)
934 { 2609 {
935 evio_set (&once->io, fd, events); 2610 ev_io_set (&once->io, fd, events);
936 evio_start (&once->io); 2611 ev_io_start (EV_A_ &once->io);
937 } 2612 }
938 2613
939 evw_init (&once->to, once_cb_to); 2614 ev_init (&once->to, once_cb_to);
940
941 if (timeout >= 0.) 2615 if (timeout >= 0.)
942 { 2616 {
943 evtimer_set (&once->to, timeout, 0.); 2617 ev_timer_set (&once->to, timeout, 0.);
944 evtimer_start (&once->to); 2618 ev_timer_start (EV_A_ &once->to);
945 }
946 }
947}
948
949/*****************************************************************************/
950
951#if 0
952
953struct ev_io wio;
954
955static void
956sin_cb (struct ev_io *w, int revents)
957{
958 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
959}
960
961static void
962ocb (struct ev_timer *w, int revents)
963{
964 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
965 evtimer_stop (w);
966 evtimer_start (w);
967}
968
969static void
970scb (struct ev_signal *w, int revents)
971{
972 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
973 evio_stop (&wio);
974 evio_start (&wio);
975}
976
977static void
978gcb (struct ev_signal *w, int revents)
979{
980 fprintf (stderr, "generic %x\n", revents);
981
982}
983
984int main (void)
985{
986 ev_init (0);
987
988 evio_init (&wio, sin_cb, 0, EV_READ);
989 evio_start (&wio);
990
991 struct ev_timer t[10000];
992
993#if 0
994 int i;
995 for (i = 0; i < 10000; ++i)
996 { 2619 }
997 struct ev_timer *w = t + i;
998 evw_init (w, ocb, i);
999 evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1000 evtimer_start (w);
1001 if (drand48 () < 0.5)
1002 evtimer_stop (w);
1003 }
1004#endif
1005
1006 struct ev_timer t1;
1007 evtimer_init (&t1, ocb, 5, 10);
1008 evtimer_start (&t1);
1009
1010 struct ev_signal sig;
1011 evsignal_init (&sig, scb, SIGQUIT);
1012 evsignal_start (&sig);
1013
1014 struct ev_check cw;
1015 evcheck_init (&cw, gcb);
1016 evcheck_start (&cw);
1017
1018 struct ev_idle iw;
1019 evidle_init (&iw, gcb);
1020 evidle_start (&iw);
1021
1022 ev_loop (0);
1023
1024 return 0;
1025} 2620}
1026 2621
2622#if EV_MULTIPLICITY
2623 #include "ev_wrap.h"
1027#endif 2624#endif
1028 2625
2626#ifdef __cplusplus
2627}
2628#endif
1029 2629
1030
1031

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