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Comparing libev/ev.c (file contents):
Revision 1.17 by root, Wed Oct 31 14:44:15 2007 UTC vs.
Revision 1.224 by root, Wed Apr 9 22:07:50 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#define HAVE_EPOLL 1 146#include <signal.h>
45 147
46#ifndef HAVE_MONOTONIC 148#ifdef EV_H
47# ifdef CLOCK_MONOTONIC 149# include EV_H
48# define HAVE_MONOTONIC 1 150#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
49# endif 163# endif
50#endif 164#endif
51 165
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
52#ifndef HAVE_SELECT 180#ifndef EV_USE_SELECT
53# 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
54#endif 189# endif
190#endif
55 191
56#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
57# define HAVE_EPOLL 0 196# define EV_USE_EPOLL 0
58#endif 197# endif
198#endif
59 199
60#ifndef HAVE_REALTIME 200#ifndef EV_USE_KQUEUE
61# 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
62#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 */
63 294
64#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) */
65#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 */
66 298
67#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 && __GNUC__ < 2
306# define inline
307# endif
308#endif
68 309
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
69typedef struct ev_watcher *W; 326typedef ev_watcher *W;
70typedef struct ev_watcher_list *WL; 327typedef ev_watcher_list *WL;
71typedef struct ev_watcher_time *WT; 328typedef ev_watcher_time *WT;
72 329
73static 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 *
366ev_realloc_emul (void *ptr, long size)
367{
368 /* some systems, notably openbsd and darwin, fail to properly
369 * implement realloc (x, 0) (as required by both ansi c-98 and
370 * the single unix specification, so work around them here.
371 */
372
373 if (size)
374 return realloc (ptr, size);
375
376 free (ptr);
377 return 0;
378}
379
380static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
381
382void
383ev_set_allocator (void *(*cb)(void *ptr, long size))
384{
385 alloc = cb;
386}
387
388inline_speed void *
389ev_realloc (void *ptr, long size)
390{
391 ptr = alloc (ptr, size);
392
393 if (!ptr && size)
394 {
395 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
396 abort ();
397 }
398
399 return ptr;
400}
401
402#define ev_malloc(size) ev_realloc (0, (size))
403#define ev_free(ptr) ev_realloc ((ptr), 0)
404
405/*****************************************************************************/
406
407typedef struct
408{
409 WL head;
410 unsigned char events;
411 unsigned char reify;
412#if EV_SELECT_IS_WINSOCKET
413 SOCKET handle;
414#endif
415} ANFD;
416
417typedef struct
418{
419 W w;
420 int events;
421} ANPENDING;
422
423#if EV_USE_INOTIFY
424typedef struct
425{
426 WL head;
427} ANFS;
428#endif
429
430#if EV_MULTIPLICITY
431
432 struct ev_loop
433 {
434 ev_tstamp ev_rt_now;
435 #define ev_rt_now ((loop)->ev_rt_now)
436 #define VAR(name,decl) decl;
437 #include "ev_vars.h"
438 #undef VAR
439 };
440 #include "ev_wrap.h"
441
442 static struct ev_loop default_loop_struct;
443 struct ev_loop *ev_default_loop_ptr;
444
445#else
446
74ev_tstamp ev_now; 447 ev_tstamp ev_rt_now;
75int ev_method; 448 #define VAR(name,decl) static decl;
449 #include "ev_vars.h"
450 #undef VAR
76 451
77static int have_monotonic; /* runtime */ 452 static int ev_default_loop_ptr;
78 453
79static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 454#endif
80static void (*method_modify)(int fd, int oev, int nev);
81static void (*method_poll)(ev_tstamp timeout);
82 455
83/*****************************************************************************/ 456/*****************************************************************************/
84 457
85ev_tstamp 458ev_tstamp
86ev_time (void) 459ev_time (void)
87{ 460{
88#if HAVE_REALTIME 461#if EV_USE_REALTIME
89 struct timespec ts; 462 struct timespec ts;
90 clock_gettime (CLOCK_REALTIME, &ts); 463 clock_gettime (CLOCK_REALTIME, &ts);
91 return ts.tv_sec + ts.tv_nsec * 1e-9; 464 return ts.tv_sec + ts.tv_nsec * 1e-9;
92#else 465#else
93 struct timeval tv; 466 struct timeval tv;
94 gettimeofday (&tv, 0); 467 gettimeofday (&tv, 0);
95 return tv.tv_sec + tv.tv_usec * 1e-6; 468 return tv.tv_sec + tv.tv_usec * 1e-6;
96#endif 469#endif
97} 470}
98 471
99static ev_tstamp 472ev_tstamp inline_size
100get_clock (void) 473get_clock (void)
101{ 474{
102#if HAVE_MONOTONIC 475#if EV_USE_MONOTONIC
103 if (have_monotonic) 476 if (expect_true (have_monotonic))
104 { 477 {
105 struct timespec ts; 478 struct timespec ts;
106 clock_gettime (CLOCK_MONOTONIC, &ts); 479 clock_gettime (CLOCK_MONOTONIC, &ts);
107 return ts.tv_sec + ts.tv_nsec * 1e-9; 480 return ts.tv_sec + ts.tv_nsec * 1e-9;
108 } 481 }
109#endif 482#endif
110 483
111 return ev_time (); 484 return ev_time ();
112} 485}
113 486
114#define array_needsize(base,cur,cnt,init) \ 487#if EV_MULTIPLICITY
115 if ((cnt) > cur) \ 488ev_tstamp
116 { \ 489ev_now (EV_P)
117 int newcnt = cur ? cur << 1 : 16; \ 490{
118 base = realloc (base, sizeof (*base) * (newcnt)); \ 491 return ev_rt_now;
119 init (base + cur, newcnt - cur); \ 492}
120 cur = newcnt; \ 493#endif
494
495void
496ev_sleep (ev_tstamp delay)
497{
498 if (delay > 0.)
121 } 499 {
500#if EV_USE_NANOSLEEP
501 struct timespec ts;
502
503 ts.tv_sec = (time_t)delay;
504 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
505
506 nanosleep (&ts, 0);
507#elif defined(_WIN32)
508 Sleep ((unsigned long)(delay * 1e3));
509#else
510 struct timeval tv;
511
512 tv.tv_sec = (time_t)delay;
513 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
514
515 select (0, 0, 0, 0, &tv);
516#endif
517 }
518}
122 519
123/*****************************************************************************/ 520/*****************************************************************************/
124 521
522int inline_size
523array_nextsize (int elem, int cur, int cnt)
524{
525 int ncur = cur + 1;
526
527 do
528 ncur <<= 1;
529 while (cnt > ncur);
530
531 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
532 if (elem * ncur > 4096)
533 {
534 ncur *= elem;
535 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
536 ncur = ncur - sizeof (void *) * 4;
537 ncur /= elem;
538 }
539
540 return ncur;
541}
542
543static noinline void *
544array_realloc (int elem, void *base, int *cur, int cnt)
545{
546 *cur = array_nextsize (elem, *cur, cnt);
547 return ev_realloc (base, elem * *cur);
548}
549
550#define array_needsize(type,base,cur,cnt,init) \
551 if (expect_false ((cnt) > (cur))) \
552 { \
553 int ocur_ = (cur); \
554 (base) = (type *)array_realloc \
555 (sizeof (type), (base), &(cur), (cnt)); \
556 init ((base) + (ocur_), (cur) - ocur_); \
557 }
558
559#if 0
560#define array_slim(type,stem) \
561 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
562 { \
563 stem ## max = array_roundsize (stem ## cnt >> 1); \
564 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
565 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
566 }
567#endif
568
569#define array_free(stem, idx) \
570 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
571
572/*****************************************************************************/
573
574void noinline
575ev_feed_event (EV_P_ void *w, int revents)
576{
577 W w_ = (W)w;
578 int pri = ABSPRI (w_);
579
580 if (expect_false (w_->pending))
581 pendings [pri][w_->pending - 1].events |= revents;
582 else
583 {
584 w_->pending = ++pendingcnt [pri];
585 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
586 pendings [pri][w_->pending - 1].w = w_;
587 pendings [pri][w_->pending - 1].events = revents;
588 }
589}
590
591void inline_speed
592queue_events (EV_P_ W *events, int eventcnt, int type)
593{
594 int i;
595
596 for (i = 0; i < eventcnt; ++i)
597 ev_feed_event (EV_A_ events [i], type);
598}
599
600/*****************************************************************************/
601
602void inline_size
603anfds_init (ANFD *base, int count)
604{
605 while (count--)
606 {
607 base->head = 0;
608 base->events = EV_NONE;
609 base->reify = 0;
610
611 ++base;
612 }
613}
614
615void inline_speed
616fd_event (EV_P_ int fd, int revents)
617{
618 ANFD *anfd = anfds + fd;
619 ev_io *w;
620
621 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
622 {
623 int ev = w->events & revents;
624
625 if (ev)
626 ev_feed_event (EV_A_ (W)w, ev);
627 }
628}
629
630void
631ev_feed_fd_event (EV_P_ int fd, int revents)
632{
633 if (fd >= 0 && fd < anfdmax)
634 fd_event (EV_A_ fd, revents);
635}
636
637void inline_size
638fd_reify (EV_P)
639{
640 int i;
641
642 for (i = 0; i < fdchangecnt; ++i)
643 {
644 int fd = fdchanges [i];
645 ANFD *anfd = anfds + fd;
646 ev_io *w;
647
648 unsigned char events = 0;
649
650 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
651 events |= (unsigned char)w->events;
652
653#if EV_SELECT_IS_WINSOCKET
654 if (events)
655 {
656 unsigned long argp;
657 #ifdef EV_FD_TO_WIN32_HANDLE
658 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
659 #else
660 anfd->handle = _get_osfhandle (fd);
661 #endif
662 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
663 }
664#endif
665
666 {
667 unsigned char o_events = anfd->events;
668 unsigned char o_reify = anfd->reify;
669
670 anfd->reify = 0;
671 anfd->events = events;
672
673 if (o_events != events || o_reify & EV_IOFDSET)
674 backend_modify (EV_A_ fd, o_events, events);
675 }
676 }
677
678 fdchangecnt = 0;
679}
680
681void inline_size
682fd_change (EV_P_ int fd, int flags)
683{
684 unsigned char reify = anfds [fd].reify;
685 anfds [fd].reify |= flags;
686
687 if (expect_true (!reify))
688 {
689 ++fdchangecnt;
690 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
691 fdchanges [fdchangecnt - 1] = fd;
692 }
693}
694
695void inline_speed
696fd_kill (EV_P_ int fd)
697{
698 ev_io *w;
699
700 while ((w = (ev_io *)anfds [fd].head))
701 {
702 ev_io_stop (EV_A_ w);
703 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
704 }
705}
706
707int inline_size
708fd_valid (int fd)
709{
710#ifdef _WIN32
711 return _get_osfhandle (fd) != -1;
712#else
713 return fcntl (fd, F_GETFD) != -1;
714#endif
715}
716
717/* called on EBADF to verify fds */
718static void noinline
719fd_ebadf (EV_P)
720{
721 int fd;
722
723 for (fd = 0; fd < anfdmax; ++fd)
724 if (anfds [fd].events)
725 if (!fd_valid (fd) == -1 && errno == EBADF)
726 fd_kill (EV_A_ fd);
727}
728
729/* called on ENOMEM in select/poll to kill some fds and retry */
730static void noinline
731fd_enomem (EV_P)
732{
733 int fd;
734
735 for (fd = anfdmax; fd--; )
736 if (anfds [fd].events)
737 {
738 fd_kill (EV_A_ fd);
739 return;
740 }
741}
742
743/* usually called after fork if backend needs to re-arm all fds from scratch */
744static void noinline
745fd_rearm_all (EV_P)
746{
747 int fd;
748
749 for (fd = 0; fd < anfdmax; ++fd)
750 if (anfds [fd].events)
751 {
752 anfds [fd].events = 0;
753 fd_change (EV_A_ fd, EV_IOFDSET | 1);
754 }
755}
756
757/*****************************************************************************/
758
759void inline_speed
760upheap (WT *heap, int k)
761{
762 WT w = heap [k];
763
764 while (k)
765 {
766 int p = (k - 1) >> 1;
767
768 if (heap [p]->at <= w->at)
769 break;
770
771 heap [k] = heap [p];
772 ((W)heap [k])->active = k + 1;
773 k = p;
774 }
775
776 heap [k] = w;
777 ((W)heap [k])->active = k + 1;
778}
779
780void inline_speed
781downheap (WT *heap, int N, int k)
782{
783 WT w = heap [k];
784
785 for (;;)
786 {
787 int c = (k << 1) + 1;
788
789 if (c >= N)
790 break;
791
792 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
793 ? 1 : 0;
794
795 if (w->at <= heap [c]->at)
796 break;
797
798 heap [k] = heap [c];
799 ((W)heap [k])->active = k + 1;
800
801 k = c;
802 }
803
804 heap [k] = w;
805 ((W)heap [k])->active = k + 1;
806}
807
808void inline_size
809adjustheap (WT *heap, int N, int k)
810{
811 upheap (heap, k);
812 downheap (heap, N, k);
813}
814
815/*****************************************************************************/
816
125typedef struct 817typedef struct
126{ 818{
127 struct ev_io *head; 819 WL head;
128 unsigned char wev, rev; /* want, received event set */ 820 EV_ATOMIC_T gotsig;
129} ANFD;
130
131static ANFD *anfds;
132static int anfdmax;
133
134static int *fdchanges;
135static int fdchangemax, fdchangecnt;
136
137static void
138anfds_init (ANFD *base, int count)
139{
140 while (count--)
141 {
142 base->head = 0;
143 base->wev = base->rev = EV_NONE;
144 ++base;
145 }
146}
147
148typedef struct
149{
150 W w;
151 int events;
152} ANPENDING;
153
154static ANPENDING *pendings;
155static int pendingmax, pendingcnt;
156
157static void
158event (W w, int events)
159{
160 if (w->active)
161 {
162 w->pending = ++pendingcnt;
163 array_needsize (pendings, pendingmax, pendingcnt, );
164 pendings [pendingcnt - 1].w = w;
165 pendings [pendingcnt - 1].events = events;
166 }
167}
168
169static void
170fd_event (int fd, int events)
171{
172 ANFD *anfd = anfds + fd;
173 struct ev_io *w;
174
175 for (w = anfd->head; w; w = w->next)
176 {
177 int ev = w->events & events;
178
179 if (ev)
180 event ((W)w, ev);
181 }
182}
183
184static void
185queue_events (W *events, int eventcnt, int type)
186{
187 int i;
188
189 for (i = 0; i < eventcnt; ++i)
190 event (events [i], type);
191}
192
193/*****************************************************************************/
194
195static struct ev_timer **timers;
196static int timermax, timercnt;
197
198static struct ev_periodic **periodics;
199static int periodicmax, periodiccnt;
200
201static void
202upheap (WT *timers, int k)
203{
204 WT w = timers [k];
205
206 while (k && timers [k >> 1]->at > w->at)
207 {
208 timers [k] = timers [k >> 1];
209 timers [k]->active = k + 1;
210 k >>= 1;
211 }
212
213 timers [k] = w;
214 timers [k]->active = k + 1;
215
216}
217
218static void
219downheap (WT *timers, int N, int k)
220{
221 WT w = timers [k];
222
223 while (k < (N >> 1))
224 {
225 int j = k << 1;
226
227 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
228 ++j;
229
230 if (w->at <= timers [j]->at)
231 break;
232
233 timers [k] = timers [j];
234 timers [k]->active = k + 1;
235 k = j;
236 }
237
238 timers [k] = w;
239 timers [k]->active = k + 1;
240}
241
242/*****************************************************************************/
243
244typedef struct
245{
246 struct ev_signal *head;
247 sig_atomic_t gotsig;
248} ANSIG; 821} ANSIG;
249 822
250static ANSIG *signals; 823static ANSIG *signals;
251static int signalmax; 824static int signalmax;
252 825
253static int sigpipe [2]; 826static EV_ATOMIC_T gotsig;
254static sig_atomic_t gotsig;
255static struct ev_io sigev;
256 827
257static void 828void inline_size
258signals_init (ANSIG *base, int count) 829signals_init (ANSIG *base, int count)
259{ 830{
260 while (count--) 831 while (count--)
261 { 832 {
262 base->head = 0; 833 base->head = 0;
263 base->gotsig = 0; 834 base->gotsig = 0;
835
264 ++base; 836 ++base;
265 } 837 }
266} 838}
267 839
840/*****************************************************************************/
841
842void inline_speed
843fd_intern (int fd)
844{
845#ifdef _WIN32
846 int arg = 1;
847 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
848#else
849 fcntl (fd, F_SETFD, FD_CLOEXEC);
850 fcntl (fd, F_SETFL, O_NONBLOCK);
851#endif
852}
853
854static void noinline
855evpipe_init (EV_P)
856{
857 if (!ev_is_active (&pipeev))
858 {
859#if EV_USE_EVENTFD
860 if ((evfd = eventfd (0, 0)) >= 0)
861 {
862 evpipe [0] = -1;
863 fd_intern (evfd);
864 ev_io_set (&pipeev, evfd, EV_READ);
865 }
866 else
867#endif
868 {
869 while (pipe (evpipe))
870 syserr ("(libev) error creating signal/async pipe");
871
872 fd_intern (evpipe [0]);
873 fd_intern (evpipe [1]);
874 ev_io_set (&pipeev, evpipe [0], EV_READ);
875 }
876
877 ev_io_start (EV_A_ &pipeev);
878 ev_unref (EV_A); /* watcher should not keep loop alive */
879 }
880}
881
882void inline_size
883evpipe_write (EV_P_ EV_ATOMIC_T *flag)
884{
885 if (!*flag)
886 {
887 int old_errno = errno; /* save errno because write might clobber it */
888
889 *flag = 1;
890
891#if EV_USE_EVENTFD
892 if (evfd >= 0)
893 {
894 uint64_t counter = 1;
895 write (evfd, &counter, sizeof (uint64_t));
896 }
897 else
898#endif
899 write (evpipe [1], &old_errno, 1);
900
901 errno = old_errno;
902 }
903}
904
268static void 905static void
906pipecb (EV_P_ ev_io *iow, int revents)
907{
908#if EV_USE_EVENTFD
909 if (evfd >= 0)
910 {
911 uint64_t counter = 1;
912 read (evfd, &counter, sizeof (uint64_t));
913 }
914 else
915#endif
916 {
917 char dummy;
918 read (evpipe [0], &dummy, 1);
919 }
920
921 if (gotsig && ev_is_default_loop (EV_A))
922 {
923 int signum;
924 gotsig = 0;
925
926 for (signum = signalmax; signum--; )
927 if (signals [signum].gotsig)
928 ev_feed_signal_event (EV_A_ signum + 1);
929 }
930
931#if EV_ASYNC_ENABLE
932 if (gotasync)
933 {
934 int i;
935 gotasync = 0;
936
937 for (i = asynccnt; i--; )
938 if (asyncs [i]->sent)
939 {
940 asyncs [i]->sent = 0;
941 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
942 }
943 }
944#endif
945}
946
947/*****************************************************************************/
948
949static void
269sighandler (int signum) 950ev_sighandler (int signum)
270{ 951{
952#if EV_MULTIPLICITY
953 struct ev_loop *loop = &default_loop_struct;
954#endif
955
956#if _WIN32
957 signal (signum, ev_sighandler);
958#endif
959
271 signals [signum - 1].gotsig = 1; 960 signals [signum - 1].gotsig = 1;
961 evpipe_write (EV_A_ &gotsig);
962}
272 963
273 if (!gotsig) 964void noinline
965ev_feed_signal_event (EV_P_ int signum)
966{
967 WL w;
968
969#if EV_MULTIPLICITY
970 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
971#endif
972
973 --signum;
974
975 if (signum < 0 || signum >= signalmax)
976 return;
977
978 signals [signum].gotsig = 0;
979
980 for (w = signals [signum].head; w; w = w->next)
981 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
982}
983
984/*****************************************************************************/
985
986static WL childs [EV_PID_HASHSIZE];
987
988#ifndef _WIN32
989
990static ev_signal childev;
991
992#ifndef WIFCONTINUED
993# define WIFCONTINUED(status) 0
994#endif
995
996void inline_speed
997child_reap (EV_P_ int chain, int pid, int status)
998{
999 ev_child *w;
1000 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1001
1002 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1003 {
1004 if ((w->pid == pid || !w->pid)
1005 && (!traced || (w->flags & 1)))
1006 {
1007 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1008 w->rpid = pid;
1009 w->rstatus = status;
1010 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1011 }
1012 }
1013}
1014
1015#ifndef WCONTINUED
1016# define WCONTINUED 0
1017#endif
1018
1019static void
1020childcb (EV_P_ ev_signal *sw, int revents)
1021{
1022 int pid, status;
1023
1024 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1025 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1026 if (!WCONTINUED
1027 || errno != EINVAL
1028 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1029 return;
1030
1031 /* make sure we are called again until all children have been reaped */
1032 /* we need to do it this way so that the callback gets called before we continue */
1033 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1034
1035 child_reap (EV_A_ pid, pid, status);
1036 if (EV_PID_HASHSIZE > 1)
1037 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1038}
1039
1040#endif
1041
1042/*****************************************************************************/
1043
1044#if EV_USE_PORT
1045# include "ev_port.c"
1046#endif
1047#if EV_USE_KQUEUE
1048# include "ev_kqueue.c"
1049#endif
1050#if EV_USE_EPOLL
1051# include "ev_epoll.c"
1052#endif
1053#if EV_USE_POLL
1054# include "ev_poll.c"
1055#endif
1056#if EV_USE_SELECT
1057# include "ev_select.c"
1058#endif
1059
1060int
1061ev_version_major (void)
1062{
1063 return EV_VERSION_MAJOR;
1064}
1065
1066int
1067ev_version_minor (void)
1068{
1069 return EV_VERSION_MINOR;
1070}
1071
1072/* return true if we are running with elevated privileges and should ignore env variables */
1073int inline_size
1074enable_secure (void)
1075{
1076#ifdef _WIN32
1077 return 0;
1078#else
1079 return getuid () != geteuid ()
1080 || getgid () != getegid ();
1081#endif
1082}
1083
1084unsigned int
1085ev_supported_backends (void)
1086{
1087 unsigned int flags = 0;
1088
1089 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1090 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1091 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1092 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1093 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1094
1095 return flags;
1096}
1097
1098unsigned int
1099ev_recommended_backends (void)
1100{
1101 unsigned int flags = ev_supported_backends ();
1102
1103#ifndef __NetBSD__
1104 /* kqueue is borked on everything but netbsd apparently */
1105 /* it usually doesn't work correctly on anything but sockets and pipes */
1106 flags &= ~EVBACKEND_KQUEUE;
1107#endif
1108#ifdef __APPLE__
1109 // flags &= ~EVBACKEND_KQUEUE; for documentation
1110 flags &= ~EVBACKEND_POLL;
1111#endif
1112
1113 return flags;
1114}
1115
1116unsigned int
1117ev_embeddable_backends (void)
1118{
1119 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1120
1121 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1122 /* please fix it and tell me how to detect the fix */
1123 flags &= ~EVBACKEND_EPOLL;
1124
1125 return flags;
1126}
1127
1128unsigned int
1129ev_backend (EV_P)
1130{
1131 return backend;
1132}
1133
1134unsigned int
1135ev_loop_count (EV_P)
1136{
1137 return loop_count;
1138}
1139
1140void
1141ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1142{
1143 io_blocktime = interval;
1144}
1145
1146void
1147ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1148{
1149 timeout_blocktime = interval;
1150}
1151
1152static void noinline
1153loop_init (EV_P_ unsigned int flags)
1154{
1155 if (!backend)
1156 {
1157#if EV_USE_MONOTONIC
274 { 1158 {
1159 struct timespec ts;
1160 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1161 have_monotonic = 1;
1162 }
1163#endif
1164
1165 ev_rt_now = ev_time ();
1166 mn_now = get_clock ();
1167 now_floor = mn_now;
1168 rtmn_diff = ev_rt_now - mn_now;
1169
1170 io_blocktime = 0.;
1171 timeout_blocktime = 0.;
1172 backend = 0;
1173 backend_fd = -1;
1174 gotasync = 0;
1175#if EV_USE_INOTIFY
1176 fs_fd = -2;
1177#endif
1178
1179 /* pid check not overridable via env */
1180#ifndef _WIN32
1181 if (flags & EVFLAG_FORKCHECK)
1182 curpid = getpid ();
1183#endif
1184
1185 if (!(flags & EVFLAG_NOENV)
1186 && !enable_secure ()
1187 && getenv ("LIBEV_FLAGS"))
1188 flags = atoi (getenv ("LIBEV_FLAGS"));
1189
1190 if (!(flags & 0x0000ffffUL))
1191 flags |= ev_recommended_backends ();
1192
1193#if EV_USE_PORT
1194 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1195#endif
1196#if EV_USE_KQUEUE
1197 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1198#endif
1199#if EV_USE_EPOLL
1200 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1201#endif
1202#if EV_USE_POLL
1203 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1204#endif
1205#if EV_USE_SELECT
1206 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1207#endif
1208
1209 ev_init (&pipeev, pipecb);
1210 ev_set_priority (&pipeev, EV_MAXPRI);
1211 }
1212}
1213
1214static void noinline
1215loop_destroy (EV_P)
1216{
1217 int i;
1218
1219 if (ev_is_active (&pipeev))
1220 {
1221 ev_ref (EV_A); /* signal watcher */
1222 ev_io_stop (EV_A_ &pipeev);
1223
1224#if EV_USE_EVENTFD
1225 if (evfd >= 0)
1226 close (evfd);
1227#endif
1228
1229 if (evpipe [0] >= 0)
1230 {
1231 close (evpipe [0]);
1232 close (evpipe [1]);
1233 }
1234 }
1235
1236#if EV_USE_INOTIFY
1237 if (fs_fd >= 0)
1238 close (fs_fd);
1239#endif
1240
1241 if (backend_fd >= 0)
1242 close (backend_fd);
1243
1244#if EV_USE_PORT
1245 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1246#endif
1247#if EV_USE_KQUEUE
1248 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1249#endif
1250#if EV_USE_EPOLL
1251 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1252#endif
1253#if EV_USE_POLL
1254 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1255#endif
1256#if EV_USE_SELECT
1257 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1258#endif
1259
1260 for (i = NUMPRI; i--; )
1261 {
1262 array_free (pending, [i]);
1263#if EV_IDLE_ENABLE
1264 array_free (idle, [i]);
1265#endif
1266 }
1267
1268 ev_free (anfds); anfdmax = 0;
1269
1270 /* have to use the microsoft-never-gets-it-right macro */
1271 array_free (fdchange, EMPTY);
1272 array_free (timer, EMPTY);
1273#if EV_PERIODIC_ENABLE
1274 array_free (periodic, EMPTY);
1275#endif
1276#if EV_FORK_ENABLE
1277 array_free (fork, EMPTY);
1278#endif
1279 array_free (prepare, EMPTY);
1280 array_free (check, EMPTY);
1281#if EV_ASYNC_ENABLE
1282 array_free (async, EMPTY);
1283#endif
1284
1285 backend = 0;
1286}
1287
1288void inline_size infy_fork (EV_P);
1289
1290void inline_size
1291loop_fork (EV_P)
1292{
1293#if EV_USE_PORT
1294 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1295#endif
1296#if EV_USE_KQUEUE
1297 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1298#endif
1299#if EV_USE_EPOLL
1300 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1301#endif
1302#if EV_USE_INOTIFY
1303 infy_fork (EV_A);
1304#endif
1305
1306 if (ev_is_active (&pipeev))
1307 {
1308 /* this "locks" the handlers against writing to the pipe */
1309 /* while we modify the fd vars */
275 gotsig = 1; 1310 gotsig = 1;
276 write (sigpipe [1], &gotsig, 1); 1311#if EV_ASYNC_ENABLE
1312 gotasync = 1;
1313#endif
1314
1315 ev_ref (EV_A);
1316 ev_io_stop (EV_A_ &pipeev);
1317
1318#if EV_USE_EVENTFD
1319 if (evfd >= 0)
1320 close (evfd);
1321#endif
1322
1323 if (evpipe [0] >= 0)
1324 {
1325 close (evpipe [0]);
1326 close (evpipe [1]);
1327 }
1328
1329 evpipe_init (EV_A);
1330 /* now iterate over everything, in case we missed something */
1331 pipecb (EV_A_ &pipeev, EV_READ);
1332 }
1333
1334 postfork = 0;
1335}
1336
1337#if EV_MULTIPLICITY
1338struct ev_loop *
1339ev_loop_new (unsigned int flags)
1340{
1341 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1342
1343 memset (loop, 0, sizeof (struct ev_loop));
1344
1345 loop_init (EV_A_ flags);
1346
1347 if (ev_backend (EV_A))
1348 return loop;
1349
1350 return 0;
1351}
1352
1353void
1354ev_loop_destroy (EV_P)
1355{
1356 loop_destroy (EV_A);
1357 ev_free (loop);
1358}
1359
1360void
1361ev_loop_fork (EV_P)
1362{
1363 postfork = 1; /* must be in line with ev_default_fork */
1364}
1365
1366#endif
1367
1368#if EV_MULTIPLICITY
1369struct ev_loop *
1370ev_default_loop_init (unsigned int flags)
1371#else
1372int
1373ev_default_loop (unsigned int flags)
1374#endif
1375{
1376 if (!ev_default_loop_ptr)
277 } 1377 {
278} 1378#if EV_MULTIPLICITY
1379 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1380#else
1381 ev_default_loop_ptr = 1;
1382#endif
279 1383
280static void 1384 loop_init (EV_A_ flags);
281sigcb (struct ev_io *iow, int revents) 1385
1386 if (ev_backend (EV_A))
1387 {
1388#ifndef _WIN32
1389 ev_signal_init (&childev, childcb, SIGCHLD);
1390 ev_set_priority (&childev, EV_MAXPRI);
1391 ev_signal_start (EV_A_ &childev);
1392 ev_unref (EV_A); /* child watcher should not keep loop alive */
1393#endif
1394 }
1395 else
1396 ev_default_loop_ptr = 0;
1397 }
1398
1399 return ev_default_loop_ptr;
1400}
1401
1402void
1403ev_default_destroy (void)
282{ 1404{
283 struct ev_signal *w; 1405#if EV_MULTIPLICITY
1406 struct ev_loop *loop = ev_default_loop_ptr;
1407#endif
1408
1409#ifndef _WIN32
1410 ev_ref (EV_A); /* child watcher */
1411 ev_signal_stop (EV_A_ &childev);
1412#endif
1413
1414 loop_destroy (EV_A);
1415}
1416
1417void
1418ev_default_fork (void)
1419{
1420#if EV_MULTIPLICITY
1421 struct ev_loop *loop = ev_default_loop_ptr;
1422#endif
1423
1424 if (backend)
1425 postfork = 1; /* must be in line with ev_loop_fork */
1426}
1427
1428/*****************************************************************************/
1429
1430void
1431ev_invoke (EV_P_ void *w, int revents)
1432{
1433 EV_CB_INVOKE ((W)w, revents);
1434}
1435
1436void inline_speed
1437call_pending (EV_P)
1438{
284 int sig; 1439 int pri;
285 1440
286 gotsig = 0; 1441 for (pri = NUMPRI; pri--; )
287 read (sigpipe [0], &revents, 1); 1442 while (pendingcnt [pri])
288
289 for (sig = signalmax; sig--; )
290 if (signals [sig].gotsig)
291 { 1443 {
292 signals [sig].gotsig = 0; 1444 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
293 1445
294 for (w = signals [sig].head; w; w = w->next) 1446 if (expect_true (p->w))
295 event ((W)w, EV_SIGNAL); 1447 {
1448 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1449
1450 p->w->pending = 0;
1451 EV_CB_INVOKE (p->w, p->events);
1452 }
296 } 1453 }
297} 1454}
298 1455
299static void 1456void inline_size
300siginit (void)
301{
302 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
303 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
304
305 /* rather than sort out wether we really need nb, set it */
306 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
307 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
308
309 evio_set (&sigev, sigpipe [0], EV_READ);
310 evio_start (&sigev);
311}
312
313/*****************************************************************************/
314
315static struct ev_idle **idles;
316static int idlemax, idlecnt;
317
318static struct ev_check **checks;
319static int checkmax, checkcnt;
320
321/*****************************************************************************/
322
323#if HAVE_EPOLL
324# include "ev_epoll.c"
325#endif
326#if HAVE_SELECT
327# include "ev_select.c"
328#endif
329
330int ev_init (int flags)
331{
332#if HAVE_MONOTONIC
333 {
334 struct timespec ts;
335 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
336 have_monotonic = 1;
337 }
338#endif
339
340 ev_now = ev_time ();
341 now = get_clock ();
342 diff = ev_now - now;
343
344 if (pipe (sigpipe))
345 return 0;
346
347 ev_method = EVMETHOD_NONE;
348#if HAVE_EPOLL
349 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
350#endif
351#if HAVE_SELECT
352 if (ev_method == EVMETHOD_NONE) select_init (flags);
353#endif
354
355 if (ev_method)
356 {
357 evw_init (&sigev, sigcb);
358 siginit ();
359 }
360
361 return ev_method;
362}
363
364/*****************************************************************************/
365
366void ev_prefork (void)
367{
368 /* nop */
369}
370
371void ev_postfork_parent (void)
372{
373 /* nop */
374}
375
376void ev_postfork_child (void)
377{
378#if HAVE_EPOLL
379 if (ev_method == EVMETHOD_EPOLL)
380 epoll_postfork_child ();
381#endif
382
383 evio_stop (&sigev);
384 close (sigpipe [0]);
385 close (sigpipe [1]);
386 pipe (sigpipe);
387 siginit ();
388}
389
390/*****************************************************************************/
391
392static void
393fd_reify (void)
394{
395 int i;
396
397 for (i = 0; i < fdchangecnt; ++i)
398 {
399 int fd = fdchanges [i];
400 ANFD *anfd = anfds + fd;
401 struct ev_io *w;
402
403 int wev = 0;
404
405 for (w = anfd->head; w; w = w->next)
406 wev |= w->events;
407
408 if (anfd->wev != wev)
409 {
410 method_modify (fd, anfd->wev, wev);
411 anfd->wev = wev;
412 }
413 }
414
415 fdchangecnt = 0;
416}
417
418static void
419call_pending ()
420{
421 int i;
422
423 for (i = 0; i < pendingcnt; ++i)
424 {
425 ANPENDING *p = pendings + i;
426
427 if (p->w)
428 {
429 p->w->pending = 0;
430 p->w->cb (p->w, p->events);
431 }
432 }
433
434 pendingcnt = 0;
435}
436
437static void
438timers_reify () 1457timers_reify (EV_P)
439{ 1458{
440 while (timercnt && timers [0]->at <= now) 1459 while (timercnt && ((WT)timers [0])->at <= mn_now)
441 { 1460 {
442 struct ev_timer *w = timers [0]; 1461 ev_timer *w = (ev_timer *)timers [0];
443 1462
444 event ((W)w, EV_TIMEOUT); 1463 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
445 1464
446 /* first reschedule or stop timer */ 1465 /* first reschedule or stop timer */
447 if (w->repeat) 1466 if (w->repeat)
448 { 1467 {
1468 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1469
449 w->at = now + w->repeat; 1470 ((WT)w)->at += w->repeat;
450 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1471 if (((WT)w)->at < mn_now)
1472 ((WT)w)->at = mn_now;
1473
451 downheap ((WT *)timers, timercnt, 0); 1474 downheap (timers, timercnt, 0);
452 } 1475 }
453 else 1476 else
454 evtimer_stop (w); /* nonrepeating: stop timer */ 1477 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
455 }
456}
457 1478
458static void 1479 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1480 }
1481}
1482
1483#if EV_PERIODIC_ENABLE
1484void inline_size
459periodics_reify () 1485periodics_reify (EV_P)
460{ 1486{
461 while (periodiccnt && periodics [0]->at <= ev_now) 1487 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
462 { 1488 {
463 struct ev_periodic *w = periodics [0]; 1489 ev_periodic *w = (ev_periodic *)periodics [0];
1490
1491 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
464 1492
465 /* first reschedule or stop timer */ 1493 /* first reschedule or stop timer */
466 if (w->interval) 1494 if (w->reschedule_cb)
467 { 1495 {
468 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1496 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
469 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1497 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
470 downheap ((WT *)periodics, periodiccnt, 0); 1498 downheap (periodics, periodiccnt, 0);
1499 }
1500 else if (w->interval)
1501 {
1502 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1503 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1504 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1505 downheap (periodics, periodiccnt, 0);
471 } 1506 }
472 else 1507 else
473 evperiodic_stop (w); /* nonrepeating: stop timer */ 1508 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
474 1509
475 event ((W)w, EV_TIMEOUT); 1510 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
476 } 1511 }
477} 1512}
478 1513
479static void 1514static void noinline
480periodics_reschedule (ev_tstamp diff) 1515periodics_reschedule (EV_P)
481{ 1516{
482 int i; 1517 int i;
483 1518
484 /* adjust periodics after time jump */ 1519 /* adjust periodics after time jump */
485 for (i = 0; i < periodiccnt; ++i) 1520 for (i = 0; i < periodiccnt; ++i)
486 { 1521 {
487 struct ev_periodic *w = periodics [i]; 1522 ev_periodic *w = (ev_periodic *)periodics [i];
488 1523
1524 if (w->reschedule_cb)
1525 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
489 if (w->interval) 1526 else if (w->interval)
1527 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1528 }
1529
1530 /* now rebuild the heap */
1531 for (i = periodiccnt >> 1; i--; )
1532 downheap (periodics, periodiccnt, i);
1533}
1534#endif
1535
1536#if EV_IDLE_ENABLE
1537void inline_size
1538idle_reify (EV_P)
1539{
1540 if (expect_false (idleall))
1541 {
1542 int pri;
1543
1544 for (pri = NUMPRI; pri--; )
490 { 1545 {
491 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1546 if (pendingcnt [pri])
1547 break;
492 1548
493 if (fabs (diff) >= 1e-4) 1549 if (idlecnt [pri])
494 { 1550 {
495 evperiodic_stop (w); 1551 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
496 evperiodic_start (w); 1552 break;
497
498 i = 0; /* restart loop, inefficient, but time jumps should be rare */
499 } 1553 }
500 } 1554 }
501 } 1555 }
502} 1556}
1557#endif
503 1558
504static void 1559void inline_speed
505time_update () 1560time_update (EV_P_ ev_tstamp max_block)
506{ 1561{
507 int i; 1562 int i;
508 1563
509 ev_now = ev_time (); 1564#if EV_USE_MONOTONIC
510
511 if (have_monotonic) 1565 if (expect_true (have_monotonic))
512 { 1566 {
513 ev_tstamp odiff = diff; 1567 ev_tstamp odiff = rtmn_diff;
514 1568
515 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1569 mn_now = get_clock ();
1570
1571 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1572 /* interpolate in the meantime */
1573 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
516 { 1574 {
517 now = get_clock (); 1575 ev_rt_now = rtmn_diff + mn_now;
1576 return;
1577 }
1578
1579 now_floor = mn_now;
1580 ev_rt_now = ev_time ();
1581
1582 /* loop a few times, before making important decisions.
1583 * on the choice of "4": one iteration isn't enough,
1584 * in case we get preempted during the calls to
1585 * ev_time and get_clock. a second call is almost guaranteed
1586 * to succeed in that case, though. and looping a few more times
1587 * doesn't hurt either as we only do this on time-jumps or
1588 * in the unlikely event of having been preempted here.
1589 */
1590 for (i = 4; --i; )
1591 {
518 diff = ev_now - now; 1592 rtmn_diff = ev_rt_now - mn_now;
519 1593
520 if (fabs (odiff - diff) < MIN_TIMEJUMP) 1594 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
521 return; /* all is well */ 1595 return; /* all is well */
522 1596
523 ev_now = ev_time (); 1597 ev_rt_now = ev_time ();
1598 mn_now = get_clock ();
1599 now_floor = mn_now;
524 } 1600 }
525 1601
1602# if EV_PERIODIC_ENABLE
526 periodics_reschedule (diff - odiff); 1603 periodics_reschedule (EV_A);
1604# endif
527 /* no timer adjustment, as the monotonic clock doesn't jump */ 1605 /* no timer adjustment, as the monotonic clock doesn't jump */
1606 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
528 } 1607 }
529 else 1608 else
1609#endif
530 { 1610 {
531 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 1611 ev_rt_now = ev_time ();
1612
1613 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
532 { 1614 {
1615#if EV_PERIODIC_ENABLE
533 periodics_reschedule (ev_now - now); 1616 periodics_reschedule (EV_A);
534 1617#endif
535 /* adjust timers. this is easy, as the offset is the same for all */ 1618 /* adjust timers. this is easy, as the offset is the same for all of them */
536 for (i = 0; i < timercnt; ++i) 1619 for (i = 0; i < timercnt; ++i)
537 timers [i]->at += diff; 1620 ((WT)timers [i])->at += ev_rt_now - mn_now;
538 } 1621 }
539 1622
540 now = ev_now; 1623 mn_now = ev_rt_now;
541 }
542}
543
544int ev_loop_done;
545
546void ev_loop (int flags)
547{
548 double block;
549 ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
550
551 if (checkcnt)
552 { 1624 }
553 queue_events ((W *)checks, checkcnt, EV_CHECK); 1625}
554 call_pending (); 1626
555 } 1627void
1628ev_ref (EV_P)
1629{
1630 ++activecnt;
1631}
1632
1633void
1634ev_unref (EV_P)
1635{
1636 --activecnt;
1637}
1638
1639static int loop_done;
1640
1641void
1642ev_loop (EV_P_ int flags)
1643{
1644 loop_done = EVUNLOOP_CANCEL;
1645
1646 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
556 1647
557 do 1648 do
558 { 1649 {
1650#ifndef _WIN32
1651 if (expect_false (curpid)) /* penalise the forking check even more */
1652 if (expect_false (getpid () != curpid))
1653 {
1654 curpid = getpid ();
1655 postfork = 1;
1656 }
1657#endif
1658
1659#if EV_FORK_ENABLE
1660 /* we might have forked, so queue fork handlers */
1661 if (expect_false (postfork))
1662 if (forkcnt)
1663 {
1664 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1665 call_pending (EV_A);
1666 }
1667#endif
1668
1669 /* queue prepare watchers (and execute them) */
1670 if (expect_false (preparecnt))
1671 {
1672 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1673 call_pending (EV_A);
1674 }
1675
1676 if (expect_false (!activecnt))
1677 break;
1678
1679 /* we might have forked, so reify kernel state if necessary */
1680 if (expect_false (postfork))
1681 loop_fork (EV_A);
1682
559 /* update fd-related kernel structures */ 1683 /* update fd-related kernel structures */
560 fd_reify (); 1684 fd_reify (EV_A);
561 1685
562 /* calculate blocking time */ 1686 /* calculate blocking time */
1687 {
1688 ev_tstamp waittime = 0.;
1689 ev_tstamp sleeptime = 0.;
563 1690
564 /* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */ 1691 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
565 ev_now = ev_time ();
566
567 if (flags & EVLOOP_NONBLOCK || idlecnt)
568 block = 0.;
569 else
570 { 1692 {
1693 /* update time to cancel out callback processing overhead */
1694 time_update (EV_A_ 1e100);
1695
571 block = MAX_BLOCKTIME; 1696 waittime = MAX_BLOCKTIME;
572 1697
573 if (timercnt) 1698 if (timercnt)
574 { 1699 {
575 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 1700 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
576 if (block > to) block = to; 1701 if (waittime > to) waittime = to;
577 } 1702 }
578 1703
1704#if EV_PERIODIC_ENABLE
579 if (periodiccnt) 1705 if (periodiccnt)
580 { 1706 {
581 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1707 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
582 if (block > to) block = to; 1708 if (waittime > to) waittime = to;
583 } 1709 }
1710#endif
584 1711
585 if (block < 0.) block = 0.; 1712 if (expect_false (waittime < timeout_blocktime))
1713 waittime = timeout_blocktime;
1714
1715 sleeptime = waittime - backend_fudge;
1716
1717 if (expect_true (sleeptime > io_blocktime))
1718 sleeptime = io_blocktime;
1719
1720 if (sleeptime)
1721 {
1722 ev_sleep (sleeptime);
1723 waittime -= sleeptime;
1724 }
586 } 1725 }
587 1726
588 method_poll (block); 1727 ++loop_count;
1728 backend_poll (EV_A_ waittime);
589 1729
590 /* update ev_now, do magic */ 1730 /* update ev_rt_now, do magic */
591 time_update (); 1731 time_update (EV_A_ waittime + sleeptime);
1732 }
592 1733
593 /* queue pending timers and reschedule them */ 1734 /* queue pending timers and reschedule them */
1735 timers_reify (EV_A); /* relative timers called last */
1736#if EV_PERIODIC_ENABLE
594 periodics_reify (); /* absolute timers first */ 1737 periodics_reify (EV_A); /* absolute timers called first */
595 timers_reify (); /* relative timers second */ 1738#endif
596 1739
1740#if EV_IDLE_ENABLE
597 /* queue idle watchers unless io or timers are pending */ 1741 /* queue idle watchers unless other events are pending */
598 if (!pendingcnt) 1742 idle_reify (EV_A);
599 queue_events ((W *)idles, idlecnt, EV_IDLE); 1743#endif
600 1744
601 /* queue check and possibly idle watchers */ 1745 /* queue check watchers, to be executed first */
1746 if (expect_false (checkcnt))
602 queue_events ((W *)checks, checkcnt, EV_CHECK); 1747 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
603 1748
604 call_pending (); 1749 call_pending (EV_A);
605 } 1750 }
606 while (!ev_loop_done); 1751 while (expect_true (
1752 activecnt
1753 && !loop_done
1754 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1755 ));
607 1756
608 if (ev_loop_done != 2) 1757 if (loop_done == EVUNLOOP_ONE)
1758 loop_done = EVUNLOOP_CANCEL;
1759}
1760
1761void
1762ev_unloop (EV_P_ int how)
1763{
609 ev_loop_done = 0; 1764 loop_done = how;
610} 1765}
611 1766
612/*****************************************************************************/ 1767/*****************************************************************************/
613 1768
614static void 1769void inline_size
615wlist_add (WL *head, WL elem) 1770wlist_add (WL *head, WL elem)
616{ 1771{
617 elem->next = *head; 1772 elem->next = *head;
618 *head = elem; 1773 *head = elem;
619} 1774}
620 1775
621static void 1776void inline_size
622wlist_del (WL *head, WL elem) 1777wlist_del (WL *head, WL elem)
623{ 1778{
624 while (*head) 1779 while (*head)
625 { 1780 {
626 if (*head == elem) 1781 if (*head == elem)
… …
631 1786
632 head = &(*head)->next; 1787 head = &(*head)->next;
633 } 1788 }
634} 1789}
635 1790
636static void 1791void inline_speed
637ev_clear (W w) 1792clear_pending (EV_P_ W w)
638{ 1793{
639 if (w->pending) 1794 if (w->pending)
640 { 1795 {
641 pendings [w->pending - 1].w = 0; 1796 pendings [ABSPRI (w)][w->pending - 1].w = 0;
642 w->pending = 0; 1797 w->pending = 0;
643 } 1798 }
644} 1799}
645 1800
646static void 1801int
1802ev_clear_pending (EV_P_ void *w)
1803{
1804 W w_ = (W)w;
1805 int pending = w_->pending;
1806
1807 if (expect_true (pending))
1808 {
1809 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1810 w_->pending = 0;
1811 p->w = 0;
1812 return p->events;
1813 }
1814 else
1815 return 0;
1816}
1817
1818void inline_size
1819pri_adjust (EV_P_ W w)
1820{
1821 int pri = w->priority;
1822 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1823 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1824 w->priority = pri;
1825}
1826
1827void inline_speed
647ev_start (W w, int active) 1828ev_start (EV_P_ W w, int active)
648{ 1829{
1830 pri_adjust (EV_A_ w);
649 w->active = active; 1831 w->active = active;
1832 ev_ref (EV_A);
650} 1833}
651 1834
652static void 1835void inline_size
653ev_stop (W w) 1836ev_stop (EV_P_ W w)
654{ 1837{
1838 ev_unref (EV_A);
655 w->active = 0; 1839 w->active = 0;
656} 1840}
657 1841
658/*****************************************************************************/ 1842/*****************************************************************************/
659 1843
660void 1844void noinline
661evio_start (struct ev_io *w) 1845ev_io_start (EV_P_ ev_io *w)
662{ 1846{
663 if (ev_is_active (w))
664 return;
665
666 int fd = w->fd; 1847 int fd = w->fd;
667 1848
1849 if (expect_false (ev_is_active (w)))
1850 return;
1851
1852 assert (("ev_io_start called with negative fd", fd >= 0));
1853
668 ev_start ((W)w, 1); 1854 ev_start (EV_A_ (W)w, 1);
669 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1855 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
670 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1856 wlist_add (&anfds[fd].head, (WL)w);
671 1857
672 ++fdchangecnt; 1858 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
673 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1859 w->events &= ~EV_IOFDSET;
674 fdchanges [fdchangecnt - 1] = fd;
675} 1860}
676 1861
677void 1862void noinline
678evio_stop (struct ev_io *w) 1863ev_io_stop (EV_P_ ev_io *w)
679{ 1864{
680 ev_clear ((W)w); 1865 clear_pending (EV_A_ (W)w);
681 if (!ev_is_active (w)) 1866 if (expect_false (!ev_is_active (w)))
682 return; 1867 return;
683 1868
1869 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1870
684 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1871 wlist_del (&anfds[w->fd].head, (WL)w);
685 ev_stop ((W)w); 1872 ev_stop (EV_A_ (W)w);
686 1873
687 ++fdchangecnt; 1874 fd_change (EV_A_ w->fd, 1);
688 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
689 fdchanges [fdchangecnt - 1] = w->fd;
690} 1875}
691 1876
692void 1877void noinline
693evtimer_start (struct ev_timer *w) 1878ev_timer_start (EV_P_ ev_timer *w)
694{ 1879{
695 if (ev_is_active (w)) 1880 if (expect_false (ev_is_active (w)))
696 return; 1881 return;
697 1882
698 w->at += now; 1883 ((WT)w)->at += mn_now;
699 1884
700 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 1885 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
701 1886
702 ev_start ((W)w, ++timercnt); 1887 ev_start (EV_A_ (W)w, ++timercnt);
703 array_needsize (timers, timermax, timercnt, ); 1888 array_needsize (WT, timers, timermax, timercnt, EMPTY2);
704 timers [timercnt - 1] = w; 1889 timers [timercnt - 1] = (WT)w;
705 upheap ((WT *)timers, timercnt - 1); 1890 upheap (timers, timercnt - 1);
706}
707 1891
708void 1892 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
1893}
1894
1895void noinline
709evtimer_stop (struct ev_timer *w) 1896ev_timer_stop (EV_P_ ev_timer *w)
710{ 1897{
711 ev_clear ((W)w); 1898 clear_pending (EV_A_ (W)w);
712 if (!ev_is_active (w)) 1899 if (expect_false (!ev_is_active (w)))
713 return; 1900 return;
714 1901
715 if (w->active < timercnt--) 1902 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
1903
1904 {
1905 int active = ((W)w)->active;
1906
1907 if (expect_true (--active < --timercnt))
716 { 1908 {
717 timers [w->active - 1] = timers [timercnt]; 1909 timers [active] = timers [timercnt];
718 downheap ((WT *)timers, timercnt, w->active - 1); 1910 adjustheap (timers, timercnt, active);
719 } 1911 }
1912 }
720 1913
721 w->at = w->repeat; 1914 ((WT)w)->at -= mn_now;
722 1915
723 ev_stop ((W)w); 1916 ev_stop (EV_A_ (W)w);
724} 1917}
725 1918
726void 1919void noinline
727evtimer_again (struct ev_timer *w) 1920ev_timer_again (EV_P_ ev_timer *w)
728{ 1921{
729 if (ev_is_active (w)) 1922 if (ev_is_active (w))
730 { 1923 {
731 if (w->repeat) 1924 if (w->repeat)
732 { 1925 {
733 w->at = now + w->repeat; 1926 ((WT)w)->at = mn_now + w->repeat;
734 downheap ((WT *)timers, timercnt, w->active - 1); 1927 adjustheap (timers, timercnt, ((W)w)->active - 1);
735 } 1928 }
736 else 1929 else
737 evtimer_stop (w); 1930 ev_timer_stop (EV_A_ w);
738 } 1931 }
739 else if (w->repeat) 1932 else if (w->repeat)
1933 {
1934 w->at = w->repeat;
740 evtimer_start (w); 1935 ev_timer_start (EV_A_ w);
1936 }
741} 1937}
742 1938
743void 1939#if EV_PERIODIC_ENABLE
1940void noinline
744evperiodic_start (struct ev_periodic *w) 1941ev_periodic_start (EV_P_ ev_periodic *w)
745{ 1942{
746 if (ev_is_active (w)) 1943 if (expect_false (ev_is_active (w)))
747 return; 1944 return;
748 1945
749 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 1946 if (w->reschedule_cb)
750 1947 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1948 else if (w->interval)
1949 {
1950 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
751 /* this formula differs from the one in periodic_reify because we do not always round up */ 1951 /* this formula differs from the one in periodic_reify because we do not always round up */
752 if (w->interval)
753 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 1952 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1953 }
1954 else
1955 ((WT)w)->at = w->offset;
754 1956
755 ev_start ((W)w, ++periodiccnt); 1957 ev_start (EV_A_ (W)w, ++periodiccnt);
756 array_needsize (periodics, periodicmax, periodiccnt, ); 1958 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
757 periodics [periodiccnt - 1] = w; 1959 periodics [periodiccnt - 1] = (WT)w;
758 upheap ((WT *)periodics, periodiccnt - 1); 1960 upheap (periodics, periodiccnt - 1);
759}
760 1961
761void 1962 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
1963}
1964
1965void noinline
762evperiodic_stop (struct ev_periodic *w) 1966ev_periodic_stop (EV_P_ ev_periodic *w)
763{ 1967{
764 ev_clear ((W)w); 1968 clear_pending (EV_A_ (W)w);
765 if (!ev_is_active (w)) 1969 if (expect_false (!ev_is_active (w)))
766 return; 1970 return;
767 1971
768 if (w->active < periodiccnt--) 1972 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
1973
1974 {
1975 int active = ((W)w)->active;
1976
1977 if (expect_true (--active < --periodiccnt))
769 { 1978 {
770 periodics [w->active - 1] = periodics [periodiccnt]; 1979 periodics [active] = periodics [periodiccnt];
771 downheap ((WT *)periodics, periodiccnt, w->active - 1); 1980 adjustheap (periodics, periodiccnt, active);
772 } 1981 }
1982 }
773 1983
774 ev_stop ((W)w); 1984 ev_stop (EV_A_ (W)w);
775} 1985}
776 1986
777void 1987void noinline
1988ev_periodic_again (EV_P_ ev_periodic *w)
1989{
1990 /* TODO: use adjustheap and recalculation */
1991 ev_periodic_stop (EV_A_ w);
1992 ev_periodic_start (EV_A_ w);
1993}
1994#endif
1995
1996#ifndef SA_RESTART
1997# define SA_RESTART 0
1998#endif
1999
2000void noinline
778evsignal_start (struct ev_signal *w) 2001ev_signal_start (EV_P_ ev_signal *w)
779{ 2002{
2003#if EV_MULTIPLICITY
2004 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2005#endif
780 if (ev_is_active (w)) 2006 if (expect_false (ev_is_active (w)))
781 return; 2007 return;
782 2008
783 ev_start ((W)w, 1); 2009 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2010
2011 evpipe_init (EV_A);
2012
2013 {
2014#ifndef _WIN32
2015 sigset_t full, prev;
2016 sigfillset (&full);
2017 sigprocmask (SIG_SETMASK, &full, &prev);
2018#endif
2019
784 array_needsize (signals, signalmax, w->signum, signals_init); 2020 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2021
2022#ifndef _WIN32
2023 sigprocmask (SIG_SETMASK, &prev, 0);
2024#endif
2025 }
2026
2027 ev_start (EV_A_ (W)w, 1);
785 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2028 wlist_add (&signals [w->signum - 1].head, (WL)w);
786 2029
787 if (!w->next) 2030 if (!((WL)w)->next)
788 { 2031 {
2032#if _WIN32
2033 signal (w->signum, ev_sighandler);
2034#else
789 struct sigaction sa; 2035 struct sigaction sa;
790 sa.sa_handler = sighandler; 2036 sa.sa_handler = ev_sighandler;
791 sigfillset (&sa.sa_mask); 2037 sigfillset (&sa.sa_mask);
792 sa.sa_flags = 0; 2038 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
793 sigaction (w->signum, &sa, 0); 2039 sigaction (w->signum, &sa, 0);
2040#endif
794 } 2041 }
795} 2042}
796 2043
797void 2044void noinline
798evsignal_stop (struct ev_signal *w) 2045ev_signal_stop (EV_P_ ev_signal *w)
799{ 2046{
800 ev_clear ((W)w); 2047 clear_pending (EV_A_ (W)w);
801 if (!ev_is_active (w)) 2048 if (expect_false (!ev_is_active (w)))
802 return; 2049 return;
803 2050
804 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2051 wlist_del (&signals [w->signum - 1].head, (WL)w);
805 ev_stop ((W)w); 2052 ev_stop (EV_A_ (W)w);
806 2053
807 if (!signals [w->signum - 1].head) 2054 if (!signals [w->signum - 1].head)
808 signal (w->signum, SIG_DFL); 2055 signal (w->signum, SIG_DFL);
809} 2056}
810 2057
811void evidle_start (struct ev_idle *w) 2058void
2059ev_child_start (EV_P_ ev_child *w)
812{ 2060{
2061#if EV_MULTIPLICITY
2062 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2063#endif
813 if (ev_is_active (w)) 2064 if (expect_false (ev_is_active (w)))
814 return; 2065 return;
815 2066
816 ev_start ((W)w, ++idlecnt); 2067 ev_start (EV_A_ (W)w, 1);
817 array_needsize (idles, idlemax, idlecnt, ); 2068 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
818 idles [idlecnt - 1] = w;
819} 2069}
820 2070
821void evidle_stop (struct ev_idle *w) 2071void
2072ev_child_stop (EV_P_ ev_child *w)
822{ 2073{
823 ev_clear ((W)w); 2074 clear_pending (EV_A_ (W)w);
824 if (ev_is_active (w)) 2075 if (expect_false (!ev_is_active (w)))
825 return; 2076 return;
826 2077
827 idles [w->active - 1] = idles [--idlecnt]; 2078 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
828 ev_stop ((W)w); 2079 ev_stop (EV_A_ (W)w);
829} 2080}
830 2081
2082#if EV_STAT_ENABLE
2083
2084# ifdef _WIN32
2085# undef lstat
2086# define lstat(a,b) _stati64 (a,b)
2087# endif
2088
2089#define DEF_STAT_INTERVAL 5.0074891
2090#define MIN_STAT_INTERVAL 0.1074891
2091
2092static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2093
2094#if EV_USE_INOTIFY
2095# define EV_INOTIFY_BUFSIZE 8192
2096
2097static void noinline
2098infy_add (EV_P_ ev_stat *w)
2099{
2100 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);
2101
2102 if (w->wd < 0)
2103 {
2104 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2105
2106 /* monitor some parent directory for speedup hints */
2107 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2108 {
2109 char path [4096];
2110 strcpy (path, w->path);
2111
2112 do
2113 {
2114 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2115 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2116
2117 char *pend = strrchr (path, '/');
2118
2119 if (!pend)
2120 break; /* whoops, no '/', complain to your admin */
2121
2122 *pend = 0;
2123 w->wd = inotify_add_watch (fs_fd, path, mask);
2124 }
2125 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2126 }
2127 }
2128 else
2129 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2130
2131 if (w->wd >= 0)
2132 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2133}
2134
2135static void noinline
2136infy_del (EV_P_ ev_stat *w)
2137{
2138 int slot;
2139 int wd = w->wd;
2140
2141 if (wd < 0)
2142 return;
2143
2144 w->wd = -2;
2145 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2146 wlist_del (&fs_hash [slot].head, (WL)w);
2147
2148 /* remove this watcher, if others are watching it, they will rearm */
2149 inotify_rm_watch (fs_fd, wd);
2150}
2151
2152static void noinline
2153infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2154{
2155 if (slot < 0)
2156 /* overflow, need to check for all hahs slots */
2157 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2158 infy_wd (EV_A_ slot, wd, ev);
2159 else
2160 {
2161 WL w_;
2162
2163 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2164 {
2165 ev_stat *w = (ev_stat *)w_;
2166 w_ = w_->next; /* lets us remove this watcher and all before it */
2167
2168 if (w->wd == wd || wd == -1)
2169 {
2170 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2171 {
2172 w->wd = -1;
2173 infy_add (EV_A_ w); /* re-add, no matter what */
2174 }
2175
2176 stat_timer_cb (EV_A_ &w->timer, 0);
2177 }
2178 }
2179 }
2180}
2181
2182static void
2183infy_cb (EV_P_ ev_io *w, int revents)
2184{
2185 char buf [EV_INOTIFY_BUFSIZE];
2186 struct inotify_event *ev = (struct inotify_event *)buf;
2187 int ofs;
2188 int len = read (fs_fd, buf, sizeof (buf));
2189
2190 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2191 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2192}
2193
2194void inline_size
2195infy_init (EV_P)
2196{
2197 if (fs_fd != -2)
2198 return;
2199
2200 fs_fd = inotify_init ();
2201
2202 if (fs_fd >= 0)
2203 {
2204 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2205 ev_set_priority (&fs_w, EV_MAXPRI);
2206 ev_io_start (EV_A_ &fs_w);
2207 }
2208}
2209
2210void inline_size
2211infy_fork (EV_P)
2212{
2213 int slot;
2214
2215 if (fs_fd < 0)
2216 return;
2217
2218 close (fs_fd);
2219 fs_fd = inotify_init ();
2220
2221 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2222 {
2223 WL w_ = fs_hash [slot].head;
2224 fs_hash [slot].head = 0;
2225
2226 while (w_)
2227 {
2228 ev_stat *w = (ev_stat *)w_;
2229 w_ = w_->next; /* lets us add this watcher */
2230
2231 w->wd = -1;
2232
2233 if (fs_fd >= 0)
2234 infy_add (EV_A_ w); /* re-add, no matter what */
2235 else
2236 ev_timer_start (EV_A_ &w->timer);
2237 }
2238
2239 }
2240}
2241
2242#endif
2243
2244void
2245ev_stat_stat (EV_P_ ev_stat *w)
2246{
2247 if (lstat (w->path, &w->attr) < 0)
2248 w->attr.st_nlink = 0;
2249 else if (!w->attr.st_nlink)
2250 w->attr.st_nlink = 1;
2251}
2252
2253static void noinline
2254stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2255{
2256 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2257
2258 /* we copy this here each the time so that */
2259 /* prev has the old value when the callback gets invoked */
2260 w->prev = w->attr;
2261 ev_stat_stat (EV_A_ w);
2262
2263 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2264 if (
2265 w->prev.st_dev != w->attr.st_dev
2266 || w->prev.st_ino != w->attr.st_ino
2267 || w->prev.st_mode != w->attr.st_mode
2268 || w->prev.st_nlink != w->attr.st_nlink
2269 || w->prev.st_uid != w->attr.st_uid
2270 || w->prev.st_gid != w->attr.st_gid
2271 || w->prev.st_rdev != w->attr.st_rdev
2272 || w->prev.st_size != w->attr.st_size
2273 || w->prev.st_atime != w->attr.st_atime
2274 || w->prev.st_mtime != w->attr.st_mtime
2275 || w->prev.st_ctime != w->attr.st_ctime
2276 ) {
2277 #if EV_USE_INOTIFY
2278 infy_del (EV_A_ w);
2279 infy_add (EV_A_ w);
2280 ev_stat_stat (EV_A_ w); /* avoid race... */
2281 #endif
2282
2283 ev_feed_event (EV_A_ w, EV_STAT);
2284 }
2285}
2286
2287void
2288ev_stat_start (EV_P_ ev_stat *w)
2289{
2290 if (expect_false (ev_is_active (w)))
2291 return;
2292
2293 /* since we use memcmp, we need to clear any padding data etc. */
2294 memset (&w->prev, 0, sizeof (ev_statdata));
2295 memset (&w->attr, 0, sizeof (ev_statdata));
2296
2297 ev_stat_stat (EV_A_ w);
2298
2299 if (w->interval < MIN_STAT_INTERVAL)
2300 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2301
2302 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2303 ev_set_priority (&w->timer, ev_priority (w));
2304
2305#if EV_USE_INOTIFY
2306 infy_init (EV_A);
2307
2308 if (fs_fd >= 0)
2309 infy_add (EV_A_ w);
2310 else
2311#endif
2312 ev_timer_start (EV_A_ &w->timer);
2313
2314 ev_start (EV_A_ (W)w, 1);
2315}
2316
2317void
2318ev_stat_stop (EV_P_ ev_stat *w)
2319{
2320 clear_pending (EV_A_ (W)w);
2321 if (expect_false (!ev_is_active (w)))
2322 return;
2323
2324#if EV_USE_INOTIFY
2325 infy_del (EV_A_ w);
2326#endif
2327 ev_timer_stop (EV_A_ &w->timer);
2328
2329 ev_stop (EV_A_ (W)w);
2330}
2331#endif
2332
2333#if EV_IDLE_ENABLE
2334void
2335ev_idle_start (EV_P_ ev_idle *w)
2336{
2337 if (expect_false (ev_is_active (w)))
2338 return;
2339
2340 pri_adjust (EV_A_ (W)w);
2341
2342 {
2343 int active = ++idlecnt [ABSPRI (w)];
2344
2345 ++idleall;
2346 ev_start (EV_A_ (W)w, active);
2347
2348 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2349 idles [ABSPRI (w)][active - 1] = w;
2350 }
2351}
2352
2353void
2354ev_idle_stop (EV_P_ ev_idle *w)
2355{
2356 clear_pending (EV_A_ (W)w);
2357 if (expect_false (!ev_is_active (w)))
2358 return;
2359
2360 {
2361 int active = ((W)w)->active;
2362
2363 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2364 ((W)idles [ABSPRI (w)][active - 1])->active = active;
2365
2366 ev_stop (EV_A_ (W)w);
2367 --idleall;
2368 }
2369}
2370#endif
2371
2372void
2373ev_prepare_start (EV_P_ ev_prepare *w)
2374{
2375 if (expect_false (ev_is_active (w)))
2376 return;
2377
2378 ev_start (EV_A_ (W)w, ++preparecnt);
2379 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2380 prepares [preparecnt - 1] = w;
2381}
2382
2383void
2384ev_prepare_stop (EV_P_ ev_prepare *w)
2385{
2386 clear_pending (EV_A_ (W)w);
2387 if (expect_false (!ev_is_active (w)))
2388 return;
2389
2390 {
2391 int active = ((W)w)->active;
2392 prepares [active - 1] = prepares [--preparecnt];
2393 ((W)prepares [active - 1])->active = active;
2394 }
2395
2396 ev_stop (EV_A_ (W)w);
2397}
2398
2399void
831void evcheck_start (struct ev_check *w) 2400ev_check_start (EV_P_ ev_check *w)
832{ 2401{
833 if (ev_is_active (w)) 2402 if (expect_false (ev_is_active (w)))
834 return; 2403 return;
835 2404
836 ev_start ((W)w, ++checkcnt); 2405 ev_start (EV_A_ (W)w, ++checkcnt);
837 array_needsize (checks, checkmax, checkcnt, ); 2406 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
838 checks [checkcnt - 1] = w; 2407 checks [checkcnt - 1] = w;
839} 2408}
840 2409
2410void
841void evcheck_stop (struct ev_check *w) 2411ev_check_stop (EV_P_ ev_check *w)
842{ 2412{
843 ev_clear ((W)w); 2413 clear_pending (EV_A_ (W)w);
844 if (ev_is_active (w)) 2414 if (expect_false (!ev_is_active (w)))
845 return; 2415 return;
846 2416
2417 {
2418 int active = ((W)w)->active;
847 checks [w->active - 1] = checks [--checkcnt]; 2419 checks [active - 1] = checks [--checkcnt];
2420 ((W)checks [active - 1])->active = active;
2421 }
2422
848 ev_stop ((W)w); 2423 ev_stop (EV_A_ (W)w);
849} 2424}
2425
2426#if EV_EMBED_ENABLE
2427void noinline
2428ev_embed_sweep (EV_P_ ev_embed *w)
2429{
2430 ev_loop (w->other, EVLOOP_NONBLOCK);
2431}
2432
2433static void
2434embed_io_cb (EV_P_ ev_io *io, int revents)
2435{
2436 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2437
2438 if (ev_cb (w))
2439 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2440 else
2441 ev_loop (w->other, EVLOOP_NONBLOCK);
2442}
2443
2444static void
2445embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2446{
2447 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2448
2449 {
2450 struct ev_loop *loop = w->other;
2451
2452 while (fdchangecnt)
2453 {
2454 fd_reify (EV_A);
2455 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2456 }
2457 }
2458}
2459
2460#if 0
2461static void
2462embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2463{
2464 ev_idle_stop (EV_A_ idle);
2465}
2466#endif
2467
2468void
2469ev_embed_start (EV_P_ ev_embed *w)
2470{
2471 if (expect_false (ev_is_active (w)))
2472 return;
2473
2474 {
2475 struct ev_loop *loop = w->other;
2476 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2477 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2478 }
2479
2480 ev_set_priority (&w->io, ev_priority (w));
2481 ev_io_start (EV_A_ &w->io);
2482
2483 ev_prepare_init (&w->prepare, embed_prepare_cb);
2484 ev_set_priority (&w->prepare, EV_MINPRI);
2485 ev_prepare_start (EV_A_ &w->prepare);
2486
2487 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2488
2489 ev_start (EV_A_ (W)w, 1);
2490}
2491
2492void
2493ev_embed_stop (EV_P_ ev_embed *w)
2494{
2495 clear_pending (EV_A_ (W)w);
2496 if (expect_false (!ev_is_active (w)))
2497 return;
2498
2499 ev_io_stop (EV_A_ &w->io);
2500 ev_prepare_stop (EV_A_ &w->prepare);
2501
2502 ev_stop (EV_A_ (W)w);
2503}
2504#endif
2505
2506#if EV_FORK_ENABLE
2507void
2508ev_fork_start (EV_P_ ev_fork *w)
2509{
2510 if (expect_false (ev_is_active (w)))
2511 return;
2512
2513 ev_start (EV_A_ (W)w, ++forkcnt);
2514 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2515 forks [forkcnt - 1] = w;
2516}
2517
2518void
2519ev_fork_stop (EV_P_ ev_fork *w)
2520{
2521 clear_pending (EV_A_ (W)w);
2522 if (expect_false (!ev_is_active (w)))
2523 return;
2524
2525 {
2526 int active = ((W)w)->active;
2527 forks [active - 1] = forks [--forkcnt];
2528 ((W)forks [active - 1])->active = active;
2529 }
2530
2531 ev_stop (EV_A_ (W)w);
2532}
2533#endif
2534
2535#if EV_ASYNC_ENABLE
2536void
2537ev_async_start (EV_P_ ev_async *w)
2538{
2539 if (expect_false (ev_is_active (w)))
2540 return;
2541
2542 evpipe_init (EV_A);
2543
2544 ev_start (EV_A_ (W)w, ++asynccnt);
2545 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2546 asyncs [asynccnt - 1] = w;
2547}
2548
2549void
2550ev_async_stop (EV_P_ ev_async *w)
2551{
2552 clear_pending (EV_A_ (W)w);
2553 if (expect_false (!ev_is_active (w)))
2554 return;
2555
2556 {
2557 int active = ((W)w)->active;
2558 asyncs [active - 1] = asyncs [--asynccnt];
2559 ((W)asyncs [active - 1])->active = active;
2560 }
2561
2562 ev_stop (EV_A_ (W)w);
2563}
2564
2565void
2566ev_async_send (EV_P_ ev_async *w)
2567{
2568 w->sent = 1;
2569 evpipe_write (EV_A_ &gotasync);
2570}
2571#endif
850 2572
851/*****************************************************************************/ 2573/*****************************************************************************/
852 2574
853struct ev_once 2575struct ev_once
854{ 2576{
855 struct ev_io io; 2577 ev_io io;
856 struct ev_timer to; 2578 ev_timer to;
857 void (*cb)(int revents, void *arg); 2579 void (*cb)(int revents, void *arg);
858 void *arg; 2580 void *arg;
859}; 2581};
860 2582
861static void 2583static void
862once_cb (struct ev_once *once, int revents) 2584once_cb (EV_P_ struct ev_once *once, int revents)
863{ 2585{
864 void (*cb)(int revents, void *arg) = once->cb; 2586 void (*cb)(int revents, void *arg) = once->cb;
865 void *arg = once->arg; 2587 void *arg = once->arg;
866 2588
867 evio_stop (&once->io); 2589 ev_io_stop (EV_A_ &once->io);
868 evtimer_stop (&once->to); 2590 ev_timer_stop (EV_A_ &once->to);
869 free (once); 2591 ev_free (once);
870 2592
871 cb (revents, arg); 2593 cb (revents, arg);
872} 2594}
873 2595
874static void 2596static void
875once_cb_io (struct ev_io *w, int revents) 2597once_cb_io (EV_P_ ev_io *w, int revents)
876{ 2598{
877 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2599 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
878} 2600}
879 2601
880static void 2602static void
881once_cb_to (struct ev_timer *w, int revents) 2603once_cb_to (EV_P_ ev_timer *w, int revents)
882{ 2604{
883 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2605 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
884} 2606}
885 2607
886void 2608void
887ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2609ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
888{ 2610{
889 struct ev_once *once = malloc (sizeof (struct ev_once)); 2611 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
890 2612
891 if (!once) 2613 if (expect_false (!once))
892 cb (EV_ERROR, arg); 2614 {
893 else 2615 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
2616 return;
894 { 2617 }
2618
895 once->cb = cb; 2619 once->cb = cb;
896 once->arg = arg; 2620 once->arg = arg;
897 2621
898 evw_init (&once->io, once_cb_io); 2622 ev_init (&once->io, once_cb_io);
899
900 if (fd >= 0) 2623 if (fd >= 0)
901 { 2624 {
902 evio_set (&once->io, fd, events); 2625 ev_io_set (&once->io, fd, events);
903 evio_start (&once->io); 2626 ev_io_start (EV_A_ &once->io);
904 } 2627 }
905 2628
906 evw_init (&once->to, once_cb_to); 2629 ev_init (&once->to, once_cb_to);
907
908 if (timeout >= 0.) 2630 if (timeout >= 0.)
909 { 2631 {
910 evtimer_set (&once->to, timeout, 0.); 2632 ev_timer_set (&once->to, timeout, 0.);
911 evtimer_start (&once->to); 2633 ev_timer_start (EV_A_ &once->to);
912 }
913 }
914}
915
916/*****************************************************************************/
917
918#if 0
919
920struct ev_io wio;
921
922static void
923sin_cb (struct ev_io *w, int revents)
924{
925 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
926}
927
928static void
929ocb (struct ev_timer *w, int revents)
930{
931 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
932 evtimer_stop (w);
933 evtimer_start (w);
934}
935
936static void
937scb (struct ev_signal *w, int revents)
938{
939 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
940 evio_stop (&wio);
941 evio_start (&wio);
942}
943
944static void
945gcb (struct ev_signal *w, int revents)
946{
947 fprintf (stderr, "generic %x\n", revents);
948
949}
950
951int main (void)
952{
953 ev_init (0);
954
955 evio_init (&wio, sin_cb, 0, EV_READ);
956 evio_start (&wio);
957
958 struct ev_timer t[10000];
959
960#if 0
961 int i;
962 for (i = 0; i < 10000; ++i)
963 { 2634 }
964 struct ev_timer *w = t + i;
965 evw_init (w, ocb, i);
966 evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
967 evtimer_start (w);
968 if (drand48 () < 0.5)
969 evtimer_stop (w);
970 }
971#endif
972
973 struct ev_timer t1;
974 evtimer_init (&t1, ocb, 5, 10);
975 evtimer_start (&t1);
976
977 struct ev_signal sig;
978 evsignal_init (&sig, scb, SIGQUIT);
979 evsignal_start (&sig);
980
981 struct ev_check cw;
982 evcheck_init (&cw, gcb);
983 evcheck_start (&cw);
984
985 struct ev_idle iw;
986 evidle_init (&iw, gcb);
987 evidle_start (&iw);
988
989 ev_loop (0);
990
991 return 0;
992} 2635}
993 2636
2637#if EV_MULTIPLICITY
2638 #include "ev_wrap.h"
994#endif 2639#endif
995 2640
2641#ifdef __cplusplus
2642}
2643#endif
996 2644
997
998

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