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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 1.231 by root, Mon May 5 20:47:33 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 && __GNUC__ < 2
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#define ev_active(w) ((W)(w))->active
331#define ev_at(w) ((WT)(w))->at
332
333#if EV_USE_MONOTONIC
334/* sig_atomic_t is used to avoid per-thread variables or locking but still */
335/* giving it a reasonably high chance of working on typical architetcures */
336static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
337#endif
338
339#ifdef _WIN32
340# include "ev_win32.c"
341#endif
342
343/*****************************************************************************/
344
345static void (*syserr_cb)(const char *msg);
346
347void
348ev_set_syserr_cb (void (*cb)(const char *msg))
349{
350 syserr_cb = cb;
351}
352
353static void noinline
354syserr (const char *msg)
355{
356 if (!msg)
357 msg = "(libev) system error";
358
359 if (syserr_cb)
360 syserr_cb (msg);
361 else
362 {
363 perror (msg);
364 abort ();
365 }
366}
367
368static void *
369ev_realloc_emul (void *ptr, long size)
370{
371 /* some systems, notably openbsd and darwin, fail to properly
372 * implement realloc (x, 0) (as required by both ansi c-98 and
373 * the single unix specification, so work around them here.
374 */
375
376 if (size)
377 return realloc (ptr, size);
378
379 free (ptr);
380 return 0;
381}
382
383static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
384
385void
386ev_set_allocator (void *(*cb)(void *ptr, long size))
387{
388 alloc = cb;
389}
390
391inline_speed void *
392ev_realloc (void *ptr, long size)
393{
394 ptr = alloc (ptr, size);
395
396 if (!ptr && size)
397 {
398 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
399 abort ();
400 }
401
402 return ptr;
403}
404
405#define ev_malloc(size) ev_realloc (0, (size))
406#define ev_free(ptr) ev_realloc ((ptr), 0)
407
408/*****************************************************************************/
409
410typedef struct
411{
412 WL head;
413 unsigned char events;
414 unsigned char reify;
415#if EV_SELECT_IS_WINSOCKET
416 SOCKET handle;
417#endif
418} ANFD;
419
420typedef struct
421{
422 W w;
423 int events;
424} ANPENDING;
425
426#if EV_USE_INOTIFY
427typedef struct
428{
429 WL head;
430} ANFS;
431#endif
432
433#if EV_MULTIPLICITY
434
435 struct ev_loop
436 {
437 ev_tstamp ev_rt_now;
438 #define ev_rt_now ((loop)->ev_rt_now)
439 #define VAR(name,decl) decl;
440 #include "ev_vars.h"
441 #undef VAR
442 };
443 #include "ev_wrap.h"
444
445 static struct ev_loop default_loop_struct;
446 struct ev_loop *ev_default_loop_ptr;
447
448#else
449
72ev_tstamp ev_now; 450 ev_tstamp ev_rt_now;
73int ev_method; 451 #define VAR(name,decl) static decl;
452 #include "ev_vars.h"
453 #undef VAR
74 454
75static int have_monotonic; /* runtime */ 455 static int ev_default_loop_ptr;
76 456
77static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 457#endif
78static void (*method_modify)(int fd, int oev, int nev);
79static void (*method_poll)(ev_tstamp timeout);
80 458
81/*****************************************************************************/ 459/*****************************************************************************/
82 460
83ev_tstamp 461ev_tstamp
84ev_time (void) 462ev_time (void)
85{ 463{
86#if HAVE_REALTIME 464#if EV_USE_REALTIME
87 struct timespec ts; 465 struct timespec ts;
88 clock_gettime (CLOCK_REALTIME, &ts); 466 clock_gettime (CLOCK_REALTIME, &ts);
89 return ts.tv_sec + ts.tv_nsec * 1e-9; 467 return ts.tv_sec + ts.tv_nsec * 1e-9;
90#else 468#else
91 struct timeval tv; 469 struct timeval tv;
92 gettimeofday (&tv, 0); 470 gettimeofday (&tv, 0);
93 return tv.tv_sec + tv.tv_usec * 1e-6; 471 return tv.tv_sec + tv.tv_usec * 1e-6;
94#endif 472#endif
95} 473}
96 474
97static ev_tstamp 475ev_tstamp inline_size
98get_clock (void) 476get_clock (void)
99{ 477{
100#if HAVE_MONOTONIC 478#if EV_USE_MONOTONIC
101 if (have_monotonic) 479 if (expect_true (have_monotonic))
102 { 480 {
103 struct timespec ts; 481 struct timespec ts;
104 clock_gettime (CLOCK_MONOTONIC, &ts); 482 clock_gettime (CLOCK_MONOTONIC, &ts);
105 return ts.tv_sec + ts.tv_nsec * 1e-9; 483 return ts.tv_sec + ts.tv_nsec * 1e-9;
106 } 484 }
107#endif 485#endif
108 486
109 return ev_time (); 487 return ev_time ();
110} 488}
111 489
112#define array_needsize(base,cur,cnt,init) \ 490#if EV_MULTIPLICITY
113 if ((cnt) > cur) \ 491ev_tstamp
114 { \ 492ev_now (EV_P)
115 int newcnt = cur ? cur << 1 : 16; \ 493{
116 base = realloc (base, sizeof (*base) * (newcnt)); \ 494 return ev_rt_now;
117 init (base + cur, newcnt - cur); \ 495}
118 cur = newcnt; \ 496#endif
497
498void
499ev_sleep (ev_tstamp delay)
500{
501 if (delay > 0.)
119 } 502 {
503#if EV_USE_NANOSLEEP
504 struct timespec ts;
505
506 ts.tv_sec = (time_t)delay;
507 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
508
509 nanosleep (&ts, 0);
510#elif defined(_WIN32)
511 Sleep ((unsigned long)(delay * 1e3));
512#else
513 struct timeval tv;
514
515 tv.tv_sec = (time_t)delay;
516 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
517
518 select (0, 0, 0, 0, &tv);
519#endif
520 }
521}
120 522
121/*****************************************************************************/ 523/*****************************************************************************/
122 524
525int inline_size
526array_nextsize (int elem, int cur, int cnt)
527{
528 int ncur = cur + 1;
529
530 do
531 ncur <<= 1;
532 while (cnt > ncur);
533
534 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
535 if (elem * ncur > 4096)
536 {
537 ncur *= elem;
538 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
539 ncur = ncur - sizeof (void *) * 4;
540 ncur /= elem;
541 }
542
543 return ncur;
544}
545
546static noinline void *
547array_realloc (int elem, void *base, int *cur, int cnt)
548{
549 *cur = array_nextsize (elem, *cur, cnt);
550 return ev_realloc (base, elem * *cur);
551}
552
553#define array_needsize(type,base,cur,cnt,init) \
554 if (expect_false ((cnt) > (cur))) \
555 { \
556 int ocur_ = (cur); \
557 (base) = (type *)array_realloc \
558 (sizeof (type), (base), &(cur), (cnt)); \
559 init ((base) + (ocur_), (cur) - ocur_); \
560 }
561
562#if 0
563#define array_slim(type,stem) \
564 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
565 { \
566 stem ## max = array_roundsize (stem ## cnt >> 1); \
567 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
568 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
569 }
570#endif
571
572#define array_free(stem, idx) \
573 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
574
575/*****************************************************************************/
576
577void noinline
578ev_feed_event (EV_P_ void *w, int revents)
579{
580 W w_ = (W)w;
581 int pri = ABSPRI (w_);
582
583 if (expect_false (w_->pending))
584 pendings [pri][w_->pending - 1].events |= revents;
585 else
586 {
587 w_->pending = ++pendingcnt [pri];
588 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
589 pendings [pri][w_->pending - 1].w = w_;
590 pendings [pri][w_->pending - 1].events = revents;
591 }
592}
593
594void inline_speed
595queue_events (EV_P_ W *events, int eventcnt, int type)
596{
597 int i;
598
599 for (i = 0; i < eventcnt; ++i)
600 ev_feed_event (EV_A_ events [i], type);
601}
602
603/*****************************************************************************/
604
605void inline_size
606anfds_init (ANFD *base, int count)
607{
608 while (count--)
609 {
610 base->head = 0;
611 base->events = EV_NONE;
612 base->reify = 0;
613
614 ++base;
615 }
616}
617
618void inline_speed
619fd_event (EV_P_ int fd, int revents)
620{
621 ANFD *anfd = anfds + fd;
622 ev_io *w;
623
624 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
625 {
626 int ev = w->events & revents;
627
628 if (ev)
629 ev_feed_event (EV_A_ (W)w, ev);
630 }
631}
632
633void
634ev_feed_fd_event (EV_P_ int fd, int revents)
635{
636 if (fd >= 0 && fd < anfdmax)
637 fd_event (EV_A_ fd, revents);
638}
639
640void inline_size
641fd_reify (EV_P)
642{
643 int i;
644
645 for (i = 0; i < fdchangecnt; ++i)
646 {
647 int fd = fdchanges [i];
648 ANFD *anfd = anfds + fd;
649 ev_io *w;
650
651 unsigned char events = 0;
652
653 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
654 events |= (unsigned char)w->events;
655
656#if EV_SELECT_IS_WINSOCKET
657 if (events)
658 {
659 unsigned long argp;
660 #ifdef EV_FD_TO_WIN32_HANDLE
661 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
662 #else
663 anfd->handle = _get_osfhandle (fd);
664 #endif
665 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
666 }
667#endif
668
669 {
670 unsigned char o_events = anfd->events;
671 unsigned char o_reify = anfd->reify;
672
673 anfd->reify = 0;
674 anfd->events = events;
675
676 if (o_events != events || o_reify & EV_IOFDSET)
677 backend_modify (EV_A_ fd, o_events, events);
678 }
679 }
680
681 fdchangecnt = 0;
682}
683
684void inline_size
685fd_change (EV_P_ int fd, int flags)
686{
687 unsigned char reify = anfds [fd].reify;
688 anfds [fd].reify |= flags;
689
690 if (expect_true (!reify))
691 {
692 ++fdchangecnt;
693 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
694 fdchanges [fdchangecnt - 1] = fd;
695 }
696}
697
698void inline_speed
699fd_kill (EV_P_ int fd)
700{
701 ev_io *w;
702
703 while ((w = (ev_io *)anfds [fd].head))
704 {
705 ev_io_stop (EV_A_ w);
706 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
707 }
708}
709
710int inline_size
711fd_valid (int fd)
712{
713#ifdef _WIN32
714 return _get_osfhandle (fd) != -1;
715#else
716 return fcntl (fd, F_GETFD) != -1;
717#endif
718}
719
720/* called on EBADF to verify fds */
721static void noinline
722fd_ebadf (EV_P)
723{
724 int fd;
725
726 for (fd = 0; fd < anfdmax; ++fd)
727 if (anfds [fd].events)
728 if (!fd_valid (fd) == -1 && errno == EBADF)
729 fd_kill (EV_A_ fd);
730}
731
732/* called on ENOMEM in select/poll to kill some fds and retry */
733static void noinline
734fd_enomem (EV_P)
735{
736 int fd;
737
738 for (fd = anfdmax; fd--; )
739 if (anfds [fd].events)
740 {
741 fd_kill (EV_A_ fd);
742 return;
743 }
744}
745
746/* usually called after fork if backend needs to re-arm all fds from scratch */
747static void noinline
748fd_rearm_all (EV_P)
749{
750 int fd;
751
752 for (fd = 0; fd < anfdmax; ++fd)
753 if (anfds [fd].events)
754 {
755 anfds [fd].events = 0;
756 fd_change (EV_A_ fd, EV_IOFDSET | 1);
757 }
758}
759
760/*****************************************************************************/
761
762/* towards the root */
763void inline_speed
764upheap (WT *heap, int k)
765{
766 WT w = heap [k];
767
768 for (;;)
769 {
770 int p = k >> 1;
771
772 /* maybe we could use a dummy element at heap [0]? */
773 if (!p || heap [p]->at <= w->at)
774 break;
775
776 heap [k] = heap [p];
777 ev_active (heap [k]) = k;
778 k = p;
779 }
780
781 heap [k] = w;
782 ev_active (heap [k]) = k;
783}
784
785/* away from the root */
786void inline_speed
787downheap (WT *heap, int N, int k)
788{
789 WT w = heap [k];
790
791 for (;;)
792 {
793 int c = k << 1;
794
795 if (c > N)
796 break;
797
798 c += c < N && heap [c]->at > heap [c + 1]->at
799 ? 1 : 0;
800
801 if (w->at <= heap [c]->at)
802 break;
803
804 heap [k] = heap [c];
805 ev_active (heap [k]) = k;
806
807 k = c;
808 }
809
810 heap [k] = w;
811 ev_active (heap [k]) = k;
812}
813
814void inline_size
815adjustheap (WT *heap, int N, int k)
816{
817 upheap (heap, k);
818 downheap (heap, N, k);
819}
820
821/*****************************************************************************/
822
123typedef struct 823typedef struct
124{ 824{
125 struct ev_io *head; 825 WL head;
126 unsigned char wev, rev; /* want, received event set */ 826 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; 827} ANSIG;
260 828
261static ANSIG *signals; 829static ANSIG *signals;
262static int signalmax; 830static int signalmax;
263 831
264static int sigpipe [2]; 832static EV_ATOMIC_T gotsig;
265static sig_atomic_t gotsig;
266static struct ev_io sigev;
267 833
268static void 834void inline_size
269signals_init (ANSIG *base, int count) 835signals_init (ANSIG *base, int count)
270{ 836{
271 while (count--) 837 while (count--)
272 { 838 {
273 base->head = 0; 839 base->head = 0;
274 base->gotsig = 0; 840 base->gotsig = 0;
841
275 ++base; 842 ++base;
276 } 843 }
277} 844}
278 845
846/*****************************************************************************/
847
848void inline_speed
849fd_intern (int fd)
850{
851#ifdef _WIN32
852 int arg = 1;
853 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
854#else
855 fcntl (fd, F_SETFD, FD_CLOEXEC);
856 fcntl (fd, F_SETFL, O_NONBLOCK);
857#endif
858}
859
860static void noinline
861evpipe_init (EV_P)
862{
863 if (!ev_is_active (&pipeev))
864 {
865#if EV_USE_EVENTFD
866 if ((evfd = eventfd (0, 0)) >= 0)
867 {
868 evpipe [0] = -1;
869 fd_intern (evfd);
870 ev_io_set (&pipeev, evfd, EV_READ);
871 }
872 else
873#endif
874 {
875 while (pipe (evpipe))
876 syserr ("(libev) error creating signal/async pipe");
877
878 fd_intern (evpipe [0]);
879 fd_intern (evpipe [1]);
880 ev_io_set (&pipeev, evpipe [0], EV_READ);
881 }
882
883 ev_io_start (EV_A_ &pipeev);
884 ev_unref (EV_A); /* watcher should not keep loop alive */
885 }
886}
887
888void inline_size
889evpipe_write (EV_P_ EV_ATOMIC_T *flag)
890{
891 if (!*flag)
892 {
893 int old_errno = errno; /* save errno because write might clobber it */
894
895 *flag = 1;
896
897#if EV_USE_EVENTFD
898 if (evfd >= 0)
899 {
900 uint64_t counter = 1;
901 write (evfd, &counter, sizeof (uint64_t));
902 }
903 else
904#endif
905 write (evpipe [1], &old_errno, 1);
906
907 errno = old_errno;
908 }
909}
910
279static void 911static void
912pipecb (EV_P_ ev_io *iow, int revents)
913{
914#if EV_USE_EVENTFD
915 if (evfd >= 0)
916 {
917 uint64_t counter = 1;
918 read (evfd, &counter, sizeof (uint64_t));
919 }
920 else
921#endif
922 {
923 char dummy;
924 read (evpipe [0], &dummy, 1);
925 }
926
927 if (gotsig && ev_is_default_loop (EV_A))
928 {
929 int signum;
930 gotsig = 0;
931
932 for (signum = signalmax; signum--; )
933 if (signals [signum].gotsig)
934 ev_feed_signal_event (EV_A_ signum + 1);
935 }
936
937#if EV_ASYNC_ENABLE
938 if (gotasync)
939 {
940 int i;
941 gotasync = 0;
942
943 for (i = asynccnt; i--; )
944 if (asyncs [i]->sent)
945 {
946 asyncs [i]->sent = 0;
947 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
948 }
949 }
950#endif
951}
952
953/*****************************************************************************/
954
955static void
280sighandler (int signum) 956ev_sighandler (int signum)
281{ 957{
958#if EV_MULTIPLICITY
959 struct ev_loop *loop = &default_loop_struct;
960#endif
961
962#if _WIN32
963 signal (signum, ev_sighandler);
964#endif
965
282 signals [signum - 1].gotsig = 1; 966 signals [signum - 1].gotsig = 1;
967 evpipe_write (EV_A_ &gotsig);
968}
283 969
284 if (!gotsig) 970void noinline
971ev_feed_signal_event (EV_P_ int signum)
972{
973 WL w;
974
975#if EV_MULTIPLICITY
976 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
977#endif
978
979 --signum;
980
981 if (signum < 0 || signum >= signalmax)
982 return;
983
984 signals [signum].gotsig = 0;
985
986 for (w = signals [signum].head; w; w = w->next)
987 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
988}
989
990/*****************************************************************************/
991
992static WL childs [EV_PID_HASHSIZE];
993
994#ifndef _WIN32
995
996static ev_signal childev;
997
998#ifndef WIFCONTINUED
999# define WIFCONTINUED(status) 0
1000#endif
1001
1002void inline_speed
1003child_reap (EV_P_ int chain, int pid, int status)
1004{
1005 ev_child *w;
1006 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1007
1008 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1009 {
1010 if ((w->pid == pid || !w->pid)
1011 && (!traced || (w->flags & 1)))
1012 {
1013 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1014 w->rpid = pid;
1015 w->rstatus = status;
1016 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1017 }
1018 }
1019}
1020
1021#ifndef WCONTINUED
1022# define WCONTINUED 0
1023#endif
1024
1025static void
1026childcb (EV_P_ ev_signal *sw, int revents)
1027{
1028 int pid, status;
1029
1030 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1031 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1032 if (!WCONTINUED
1033 || errno != EINVAL
1034 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1035 return;
1036
1037 /* make sure we are called again until all children have been reaped */
1038 /* we need to do it this way so that the callback gets called before we continue */
1039 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1040
1041 child_reap (EV_A_ pid, pid, status);
1042 if (EV_PID_HASHSIZE > 1)
1043 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1044}
1045
1046#endif
1047
1048/*****************************************************************************/
1049
1050#if EV_USE_PORT
1051# include "ev_port.c"
1052#endif
1053#if EV_USE_KQUEUE
1054# include "ev_kqueue.c"
1055#endif
1056#if EV_USE_EPOLL
1057# include "ev_epoll.c"
1058#endif
1059#if EV_USE_POLL
1060# include "ev_poll.c"
1061#endif
1062#if EV_USE_SELECT
1063# include "ev_select.c"
1064#endif
1065
1066int
1067ev_version_major (void)
1068{
1069 return EV_VERSION_MAJOR;
1070}
1071
1072int
1073ev_version_minor (void)
1074{
1075 return EV_VERSION_MINOR;
1076}
1077
1078/* return true if we are running with elevated privileges and should ignore env variables */
1079int inline_size
1080enable_secure (void)
1081{
1082#ifdef _WIN32
1083 return 0;
1084#else
1085 return getuid () != geteuid ()
1086 || getgid () != getegid ();
1087#endif
1088}
1089
1090unsigned int
1091ev_supported_backends (void)
1092{
1093 unsigned int flags = 0;
1094
1095 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1096 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1097 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1098 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1099 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1100
1101 return flags;
1102}
1103
1104unsigned int
1105ev_recommended_backends (void)
1106{
1107 unsigned int flags = ev_supported_backends ();
1108
1109#ifndef __NetBSD__
1110 /* kqueue is borked on everything but netbsd apparently */
1111 /* it usually doesn't work correctly on anything but sockets and pipes */
1112 flags &= ~EVBACKEND_KQUEUE;
1113#endif
1114#ifdef __APPLE__
1115 // flags &= ~EVBACKEND_KQUEUE; for documentation
1116 flags &= ~EVBACKEND_POLL;
1117#endif
1118
1119 return flags;
1120}
1121
1122unsigned int
1123ev_embeddable_backends (void)
1124{
1125 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1126
1127 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1128 /* please fix it and tell me how to detect the fix */
1129 flags &= ~EVBACKEND_EPOLL;
1130
1131 return flags;
1132}
1133
1134unsigned int
1135ev_backend (EV_P)
1136{
1137 return backend;
1138}
1139
1140unsigned int
1141ev_loop_count (EV_P)
1142{
1143 return loop_count;
1144}
1145
1146void
1147ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1148{
1149 io_blocktime = interval;
1150}
1151
1152void
1153ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1154{
1155 timeout_blocktime = interval;
1156}
1157
1158static void noinline
1159loop_init (EV_P_ unsigned int flags)
1160{
1161 if (!backend)
1162 {
1163#if EV_USE_MONOTONIC
285 { 1164 {
1165 struct timespec ts;
1166 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1167 have_monotonic = 1;
1168 }
1169#endif
1170
1171 ev_rt_now = ev_time ();
1172 mn_now = get_clock ();
1173 now_floor = mn_now;
1174 rtmn_diff = ev_rt_now - mn_now;
1175
1176 io_blocktime = 0.;
1177 timeout_blocktime = 0.;
1178 backend = 0;
1179 backend_fd = -1;
1180 gotasync = 0;
1181#if EV_USE_INOTIFY
1182 fs_fd = -2;
1183#endif
1184
1185 /* pid check not overridable via env */
1186#ifndef _WIN32
1187 if (flags & EVFLAG_FORKCHECK)
1188 curpid = getpid ();
1189#endif
1190
1191 if (!(flags & EVFLAG_NOENV)
1192 && !enable_secure ()
1193 && getenv ("LIBEV_FLAGS"))
1194 flags = atoi (getenv ("LIBEV_FLAGS"));
1195
1196 if (!(flags & 0x0000ffffU))
1197 flags |= ev_recommended_backends ();
1198
1199#if EV_USE_PORT
1200 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1201#endif
1202#if EV_USE_KQUEUE
1203 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1204#endif
1205#if EV_USE_EPOLL
1206 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1207#endif
1208#if EV_USE_POLL
1209 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1210#endif
1211#if EV_USE_SELECT
1212 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1213#endif
1214
1215 ev_init (&pipeev, pipecb);
1216 ev_set_priority (&pipeev, EV_MAXPRI);
1217 }
1218}
1219
1220static void noinline
1221loop_destroy (EV_P)
1222{
1223 int i;
1224
1225 if (ev_is_active (&pipeev))
1226 {
1227 ev_ref (EV_A); /* signal watcher */
1228 ev_io_stop (EV_A_ &pipeev);
1229
1230#if EV_USE_EVENTFD
1231 if (evfd >= 0)
1232 close (evfd);
1233#endif
1234
1235 if (evpipe [0] >= 0)
1236 {
1237 close (evpipe [0]);
1238 close (evpipe [1]);
1239 }
1240 }
1241
1242#if EV_USE_INOTIFY
1243 if (fs_fd >= 0)
1244 close (fs_fd);
1245#endif
1246
1247 if (backend_fd >= 0)
1248 close (backend_fd);
1249
1250#if EV_USE_PORT
1251 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1252#endif
1253#if EV_USE_KQUEUE
1254 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1255#endif
1256#if EV_USE_EPOLL
1257 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1258#endif
1259#if EV_USE_POLL
1260 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1261#endif
1262#if EV_USE_SELECT
1263 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1264#endif
1265
1266 for (i = NUMPRI; i--; )
1267 {
1268 array_free (pending, [i]);
1269#if EV_IDLE_ENABLE
1270 array_free (idle, [i]);
1271#endif
1272 }
1273
1274 ev_free (anfds); anfdmax = 0;
1275
1276 /* have to use the microsoft-never-gets-it-right macro */
1277 array_free (fdchange, EMPTY);
1278 array_free (timer, EMPTY);
1279#if EV_PERIODIC_ENABLE
1280 array_free (periodic, EMPTY);
1281#endif
1282#if EV_FORK_ENABLE
1283 array_free (fork, EMPTY);
1284#endif
1285 array_free (prepare, EMPTY);
1286 array_free (check, EMPTY);
1287#if EV_ASYNC_ENABLE
1288 array_free (async, EMPTY);
1289#endif
1290
1291 backend = 0;
1292}
1293
1294#if EV_USE_INOTIFY
1295void inline_size infy_fork (EV_P);
1296#endif
1297
1298void inline_size
1299loop_fork (EV_P)
1300{
1301#if EV_USE_PORT
1302 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1303#endif
1304#if EV_USE_KQUEUE
1305 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1306#endif
1307#if EV_USE_EPOLL
1308 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1309#endif
1310#if EV_USE_INOTIFY
1311 infy_fork (EV_A);
1312#endif
1313
1314 if (ev_is_active (&pipeev))
1315 {
1316 /* this "locks" the handlers against writing to the pipe */
1317 /* while we modify the fd vars */
286 gotsig = 1; 1318 gotsig = 1;
287 write (sigpipe [1], &gotsig, 1); 1319#if EV_ASYNC_ENABLE
1320 gotasync = 1;
1321#endif
1322
1323 ev_ref (EV_A);
1324 ev_io_stop (EV_A_ &pipeev);
1325
1326#if EV_USE_EVENTFD
1327 if (evfd >= 0)
1328 close (evfd);
1329#endif
1330
1331 if (evpipe [0] >= 0)
1332 {
1333 close (evpipe [0]);
1334 close (evpipe [1]);
1335 }
1336
1337 evpipe_init (EV_A);
1338 /* now iterate over everything, in case we missed something */
1339 pipecb (EV_A_ &pipeev, EV_READ);
1340 }
1341
1342 postfork = 0;
1343}
1344
1345#if EV_MULTIPLICITY
1346struct ev_loop *
1347ev_loop_new (unsigned int flags)
1348{
1349 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1350
1351 memset (loop, 0, sizeof (struct ev_loop));
1352
1353 loop_init (EV_A_ flags);
1354
1355 if (ev_backend (EV_A))
1356 return loop;
1357
1358 return 0;
1359}
1360
1361void
1362ev_loop_destroy (EV_P)
1363{
1364 loop_destroy (EV_A);
1365 ev_free (loop);
1366}
1367
1368void
1369ev_loop_fork (EV_P)
1370{
1371 postfork = 1; /* must be in line with ev_default_fork */
1372}
1373
1374#endif
1375
1376#if EV_MULTIPLICITY
1377struct ev_loop *
1378ev_default_loop_init (unsigned int flags)
1379#else
1380int
1381ev_default_loop (unsigned int flags)
1382#endif
1383{
1384 if (!ev_default_loop_ptr)
288 } 1385 {
289} 1386#if EV_MULTIPLICITY
1387 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1388#else
1389 ev_default_loop_ptr = 1;
1390#endif
290 1391
291static void 1392 loop_init (EV_A_ flags);
292sigcb (struct ev_io *iow, int revents) 1393
1394 if (ev_backend (EV_A))
1395 {
1396#ifndef _WIN32
1397 ev_signal_init (&childev, childcb, SIGCHLD);
1398 ev_set_priority (&childev, EV_MAXPRI);
1399 ev_signal_start (EV_A_ &childev);
1400 ev_unref (EV_A); /* child watcher should not keep loop alive */
1401#endif
1402 }
1403 else
1404 ev_default_loop_ptr = 0;
1405 }
1406
1407 return ev_default_loop_ptr;
1408}
1409
1410void
1411ev_default_destroy (void)
293{ 1412{
294 struct ev_signal *w; 1413#if EV_MULTIPLICITY
1414 struct ev_loop *loop = ev_default_loop_ptr;
1415#endif
1416
1417#ifndef _WIN32
1418 ev_ref (EV_A); /* child watcher */
1419 ev_signal_stop (EV_A_ &childev);
1420#endif
1421
1422 loop_destroy (EV_A);
1423}
1424
1425void
1426ev_default_fork (void)
1427{
1428#if EV_MULTIPLICITY
1429 struct ev_loop *loop = ev_default_loop_ptr;
1430#endif
1431
1432 if (backend)
1433 postfork = 1; /* must be in line with ev_loop_fork */
1434}
1435
1436/*****************************************************************************/
1437
1438void
1439ev_invoke (EV_P_ void *w, int revents)
1440{
1441 EV_CB_INVOKE ((W)w, revents);
1442}
1443
1444void inline_speed
1445call_pending (EV_P)
1446{
295 int sig; 1447 int pri;
296 1448
297 gotsig = 0; 1449 for (pri = NUMPRI; pri--; )
298 read (sigpipe [0], &revents, 1); 1450 while (pendingcnt [pri])
299
300 for (sig = signalmax; sig--; )
301 if (signals [sig].gotsig)
302 { 1451 {
303 signals [sig].gotsig = 0; 1452 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
304 1453
305 for (w = signals [sig].head; w; w = w->next) 1454 if (expect_true (p->w))
306 event ((W)w, EV_SIGNAL); 1455 {
1456 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1457
1458 p->w->pending = 0;
1459 EV_CB_INVOKE (p->w, p->events);
1460 }
307 } 1461 }
308} 1462}
309 1463
310static void 1464void 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 () 1465timers_reify (EV_P)
449{ 1466{
450 while (timercnt && timers [0]->at <= now) 1467 while (timercnt && ev_at (timers [1]) <= mn_now)
451 { 1468 {
452 struct ev_timer *w = timers [0]; 1469 ev_timer *w = (ev_timer *)timers [1];
453 1470
454 event ((W)w, EV_TIMEOUT); 1471 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
455 1472
456 /* first reschedule or stop timer */ 1473 /* first reschedule or stop timer */
457 if (w->repeat) 1474 if (w->repeat)
458 { 1475 {
459 w->at = now + w->repeat; 1476 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
460 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1477
1478 ev_at (w) += w->repeat;
1479 if (ev_at (w) < mn_now)
1480 ev_at (w) = mn_now;
1481
461 downheap ((WT *)timers, timercnt, 0); 1482 downheap (timers, timercnt, 1);
462 } 1483 }
463 else 1484 else
464 evtimer_stop (w); /* nonrepeating: stop timer */ 1485 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
465 }
466}
467 1486
468static void 1487 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1488 }
1489}
1490
1491#if EV_PERIODIC_ENABLE
1492void inline_size
469periodics_reify () 1493periodics_reify (EV_P)
470{ 1494{
471 while (periodiccnt && periodics [0]->at <= ev_now) 1495 while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
472 { 1496 {
473 struct ev_periodic *w = periodics [0]; 1497 ev_periodic *w = (ev_periodic *)periodics [1];
1498
1499 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
474 1500
475 /* first reschedule or stop timer */ 1501 /* first reschedule or stop timer */
476 if (w->interval) 1502 if (w->reschedule_cb)
477 { 1503 {
478 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1504 ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
479 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1505 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
480 downheap ((WT *)periodics, periodiccnt, 0); 1506 downheap (periodics, periodiccnt, 1);
1507 }
1508 else if (w->interval)
1509 {
1510 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1511 if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
1512 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
1513 downheap (periodics, periodiccnt, 1);
481 } 1514 }
482 else 1515 else
483 evperiodic_stop (w); /* nonrepeating: stop timer */ 1516 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
484 1517
485 event ((W)w, EV_TIMEOUT); 1518 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
486 } 1519 }
487} 1520}
488 1521
489static void 1522static void noinline
490periodics_reschedule (ev_tstamp diff) 1523periodics_reschedule (EV_P)
491{ 1524{
492 int i; 1525 int i;
493 1526
494 /* adjust periodics after time jump */ 1527 /* adjust periodics after time jump */
495 for (i = 0; i < periodiccnt; ++i) 1528 for (i = 1; i <= periodiccnt; ++i)
496 { 1529 {
497 struct ev_periodic *w = periodics [i]; 1530 ev_periodic *w = (ev_periodic *)periodics [i];
498 1531
1532 if (w->reschedule_cb)
1533 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
499 if (w->interval) 1534 else if (w->interval)
1535 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1536 }
1537
1538 /* now rebuild the heap */
1539 for (i = periodiccnt >> 1; i--; )
1540 downheap (periodics, periodiccnt, i);
1541}
1542#endif
1543
1544#if EV_IDLE_ENABLE
1545void inline_size
1546idle_reify (EV_P)
1547{
1548 if (expect_false (idleall))
1549 {
1550 int pri;
1551
1552 for (pri = NUMPRI; pri--; )
500 { 1553 {
501 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1554 if (pendingcnt [pri])
1555 break;
502 1556
503 if (fabs (diff) >= 1e-4) 1557 if (idlecnt [pri])
504 { 1558 {
505 evperiodic_stop (w); 1559 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
506 evperiodic_start (w); 1560 break;
507
508 i = 0; /* restart loop, inefficient, but time jumps should be rare */
509 } 1561 }
510 } 1562 }
511 } 1563 }
512} 1564}
1565#endif
513 1566
514static void 1567void inline_speed
515time_update () 1568time_update (EV_P_ ev_tstamp max_block)
516{ 1569{
517 int i; 1570 int i;
518 1571
519 ev_now = ev_time (); 1572#if EV_USE_MONOTONIC
520
521 if (have_monotonic) 1573 if (expect_true (have_monotonic))
522 { 1574 {
523 ev_tstamp odiff = diff; 1575 ev_tstamp odiff = rtmn_diff;
524 1576
525 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1577 mn_now = get_clock ();
1578
1579 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1580 /* interpolate in the meantime */
1581 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
526 { 1582 {
527 now = get_clock (); 1583 ev_rt_now = rtmn_diff + mn_now;
1584 return;
1585 }
1586
1587 now_floor = mn_now;
1588 ev_rt_now = ev_time ();
1589
1590 /* loop a few times, before making important decisions.
1591 * on the choice of "4": one iteration isn't enough,
1592 * in case we get preempted during the calls to
1593 * ev_time and get_clock. a second call is almost guaranteed
1594 * to succeed in that case, though. and looping a few more times
1595 * doesn't hurt either as we only do this on time-jumps or
1596 * in the unlikely event of having been preempted here.
1597 */
1598 for (i = 4; --i; )
1599 {
528 diff = ev_now - now; 1600 rtmn_diff = ev_rt_now - mn_now;
529 1601
530 if (fabs (odiff - diff) < MIN_TIMEJUMP) 1602 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
531 return; /* all is well */ 1603 return; /* all is well */
532 1604
533 ev_now = ev_time (); 1605 ev_rt_now = ev_time ();
1606 mn_now = get_clock ();
1607 now_floor = mn_now;
534 } 1608 }
535 1609
1610# if EV_PERIODIC_ENABLE
536 periodics_reschedule (diff - odiff); 1611 periodics_reschedule (EV_A);
1612# endif
537 /* no timer adjustment, as the monotonic clock doesn't jump */ 1613 /* no timer adjustment, as the monotonic clock doesn't jump */
1614 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
538 } 1615 }
539 else 1616 else
1617#endif
540 { 1618 {
541 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 1619 ev_rt_now = ev_time ();
1620
1621 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
542 { 1622 {
1623#if EV_PERIODIC_ENABLE
543 periodics_reschedule (ev_now - now); 1624 periodics_reschedule (EV_A);
544 1625#endif
545 /* adjust timers. this is easy, as the offset is the same for all */ 1626 /* adjust timers. this is easy, as the offset is the same for all of them */
546 for (i = 0; i < timercnt; ++i) 1627 for (i = 1; i <= timercnt; ++i)
547 timers [i]->at += diff; 1628 ev_at (timers [i]) += ev_rt_now - mn_now;
548 } 1629 }
549 1630
550 now = ev_now; 1631 mn_now = ev_rt_now;
551 } 1632 }
552} 1633}
553 1634
554int ev_loop_done; 1635void
1636ev_ref (EV_P)
1637{
1638 ++activecnt;
1639}
555 1640
1641void
1642ev_unref (EV_P)
1643{
1644 --activecnt;
1645}
1646
1647static int loop_done;
1648
1649void
556void ev_loop (int flags) 1650ev_loop (EV_P_ int flags)
557{ 1651{
558 double block; 1652 loop_done = EVUNLOOP_CANCEL;
559 ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0; 1653
1654 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
560 1655
561 do 1656 do
562 { 1657 {
1658#ifndef _WIN32
1659 if (expect_false (curpid)) /* penalise the forking check even more */
1660 if (expect_false (getpid () != curpid))
1661 {
1662 curpid = getpid ();
1663 postfork = 1;
1664 }
1665#endif
1666
1667#if EV_FORK_ENABLE
1668 /* we might have forked, so queue fork handlers */
1669 if (expect_false (postfork))
1670 if (forkcnt)
1671 {
1672 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1673 call_pending (EV_A);
1674 }
1675#endif
1676
563 /* queue check watchers (and execute them) */ 1677 /* queue prepare watchers (and execute them) */
564 if (preparecnt) 1678 if (expect_false (preparecnt))
565 { 1679 {
566 queue_events ((W *)prepares, preparecnt, EV_PREPARE); 1680 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
567 call_pending (); 1681 call_pending (EV_A);
568 } 1682 }
569 1683
1684 if (expect_false (!activecnt))
1685 break;
1686
1687 /* we might have forked, so reify kernel state if necessary */
1688 if (expect_false (postfork))
1689 loop_fork (EV_A);
1690
570 /* update fd-related kernel structures */ 1691 /* update fd-related kernel structures */
571 fd_reify (); 1692 fd_reify (EV_A);
572 1693
573 /* calculate blocking time */ 1694 /* calculate blocking time */
1695 {
1696 ev_tstamp waittime = 0.;
1697 ev_tstamp sleeptime = 0.;
574 1698
575 /* we only need this for !monotonic clockor timers, but as we basically 1699 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 { 1700 {
1701 /* update time to cancel out callback processing overhead */
1702 time_update (EV_A_ 1e100);
1703
583 block = MAX_BLOCKTIME; 1704 waittime = MAX_BLOCKTIME;
584 1705
585 if (timercnt) 1706 if (timercnt)
586 { 1707 {
587 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 1708 ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge;
588 if (block > to) block = to; 1709 if (waittime > to) waittime = to;
589 } 1710 }
590 1711
1712#if EV_PERIODIC_ENABLE
591 if (periodiccnt) 1713 if (periodiccnt)
592 { 1714 {
593 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1715 ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge;
594 if (block > to) block = to; 1716 if (waittime > to) waittime = to;
595 } 1717 }
1718#endif
596 1719
597 if (block < 0.) block = 0.; 1720 if (expect_false (waittime < timeout_blocktime))
1721 waittime = timeout_blocktime;
1722
1723 sleeptime = waittime - backend_fudge;
1724
1725 if (expect_true (sleeptime > io_blocktime))
1726 sleeptime = io_blocktime;
1727
1728 if (sleeptime)
1729 {
1730 ev_sleep (sleeptime);
1731 waittime -= sleeptime;
1732 }
598 } 1733 }
599 1734
600 method_poll (block); 1735 ++loop_count;
1736 backend_poll (EV_A_ waittime);
601 1737
602 /* update ev_now, do magic */ 1738 /* update ev_rt_now, do magic */
603 time_update (); 1739 time_update (EV_A_ waittime + sleeptime);
1740 }
604 1741
605 /* queue pending timers and reschedule them */ 1742 /* queue pending timers and reschedule them */
606 timers_reify (); /* relative timers called last */ 1743 timers_reify (EV_A); /* relative timers called last */
1744#if EV_PERIODIC_ENABLE
607 periodics_reify (); /* absolute timers called first */ 1745 periodics_reify (EV_A); /* absolute timers called first */
1746#endif
608 1747
1748#if EV_IDLE_ENABLE
609 /* queue idle watchers unless io or timers are pending */ 1749 /* queue idle watchers unless other events are pending */
610 if (!pendingcnt) 1750 idle_reify (EV_A);
611 queue_events ((W *)idles, idlecnt, EV_IDLE); 1751#endif
612 1752
613 /* queue check watchers, to be executed first */ 1753 /* queue check watchers, to be executed first */
614 if (checkcnt) 1754 if (expect_false (checkcnt))
615 queue_events ((W *)checks, checkcnt, EV_CHECK); 1755 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
616 1756
617 call_pending (); 1757 call_pending (EV_A);
618 } 1758 }
619 while (!ev_loop_done); 1759 while (expect_true (
1760 activecnt
1761 && !loop_done
1762 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1763 ));
620 1764
621 if (ev_loop_done != 2) 1765 if (loop_done == EVUNLOOP_ONE)
1766 loop_done = EVUNLOOP_CANCEL;
1767}
1768
1769void
1770ev_unloop (EV_P_ int how)
1771{
622 ev_loop_done = 0; 1772 loop_done = how;
623} 1773}
624 1774
625/*****************************************************************************/ 1775/*****************************************************************************/
626 1776
627static void 1777void inline_size
628wlist_add (WL *head, WL elem) 1778wlist_add (WL *head, WL elem)
629{ 1779{
630 elem->next = *head; 1780 elem->next = *head;
631 *head = elem; 1781 *head = elem;
632} 1782}
633 1783
634static void 1784void inline_size
635wlist_del (WL *head, WL elem) 1785wlist_del (WL *head, WL elem)
636{ 1786{
637 while (*head) 1787 while (*head)
638 { 1788 {
639 if (*head == elem) 1789 if (*head == elem)
… …
644 1794
645 head = &(*head)->next; 1795 head = &(*head)->next;
646 } 1796 }
647} 1797}
648 1798
649static void 1799void inline_speed
650ev_clear (W w) 1800clear_pending (EV_P_ W w)
651{ 1801{
652 if (w->pending) 1802 if (w->pending)
653 { 1803 {
654 pendings [w->pending - 1].w = 0; 1804 pendings [ABSPRI (w)][w->pending - 1].w = 0;
655 w->pending = 0; 1805 w->pending = 0;
656 } 1806 }
657} 1807}
658 1808
659static void 1809int
1810ev_clear_pending (EV_P_ void *w)
1811{
1812 W w_ = (W)w;
1813 int pending = w_->pending;
1814
1815 if (expect_true (pending))
1816 {
1817 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1818 w_->pending = 0;
1819 p->w = 0;
1820 return p->events;
1821 }
1822 else
1823 return 0;
1824}
1825
1826void inline_size
1827pri_adjust (EV_P_ W w)
1828{
1829 int pri = w->priority;
1830 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1831 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1832 w->priority = pri;
1833}
1834
1835void inline_speed
660ev_start (W w, int active) 1836ev_start (EV_P_ W w, int active)
661{ 1837{
1838 pri_adjust (EV_A_ w);
662 w->active = active; 1839 w->active = active;
1840 ev_ref (EV_A);
663} 1841}
664 1842
665static void 1843void inline_size
666ev_stop (W w) 1844ev_stop (EV_P_ W w)
667{ 1845{
1846 ev_unref (EV_A);
668 w->active = 0; 1847 w->active = 0;
669} 1848}
670 1849
671/*****************************************************************************/ 1850/*****************************************************************************/
672 1851
673void 1852void noinline
674evio_start (struct ev_io *w) 1853ev_io_start (EV_P_ ev_io *w)
675{ 1854{
676 if (ev_is_active (w))
677 return;
678
679 int fd = w->fd; 1855 int fd = w->fd;
680 1856
1857 if (expect_false (ev_is_active (w)))
1858 return;
1859
1860 assert (("ev_io_start called with negative fd", fd >= 0));
1861
681 ev_start ((W)w, 1); 1862 ev_start (EV_A_ (W)w, 1);
682 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1863 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
683 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1864 wlist_add (&anfds[fd].head, (WL)w);
684 1865
685 ++fdchangecnt; 1866 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
686 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1867 w->events &= ~EV_IOFDSET;
687 fdchanges [fdchangecnt - 1] = fd;
688} 1868}
689 1869
690void 1870void noinline
691evio_stop (struct ev_io *w) 1871ev_io_stop (EV_P_ ev_io *w)
692{ 1872{
693 ev_clear ((W)w); 1873 clear_pending (EV_A_ (W)w);
694 if (!ev_is_active (w)) 1874 if (expect_false (!ev_is_active (w)))
695 return; 1875 return;
696 1876
1877 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1878
697 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1879 wlist_del (&anfds[w->fd].head, (WL)w);
698 ev_stop ((W)w); 1880 ev_stop (EV_A_ (W)w);
699 1881
700 ++fdchangecnt; 1882 fd_change (EV_A_ w->fd, 1);
701 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
702 fdchanges [fdchangecnt - 1] = w->fd;
703} 1883}
704 1884
705void 1885void noinline
706evtimer_start (struct ev_timer *w) 1886ev_timer_start (EV_P_ ev_timer *w)
707{ 1887{
708 if (ev_is_active (w)) 1888 if (expect_false (ev_is_active (w)))
709 return; 1889 return;
710 1890
711 w->at += now; 1891 ev_at (w) += mn_now;
712 1892
713 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 1893 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
714 1894
715 ev_start ((W)w, ++timercnt); 1895 ev_start (EV_A_ (W)w, ++timercnt);
716 array_needsize (timers, timermax, timercnt, ); 1896 array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2);
717 timers [timercnt - 1] = w; 1897 timers [timercnt] = (WT)w;
718 upheap ((WT *)timers, timercnt - 1); 1898 upheap (timers, timercnt);
719}
720 1899
721void 1900 /*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
1901}
1902
1903void noinline
722evtimer_stop (struct ev_timer *w) 1904ev_timer_stop (EV_P_ ev_timer *w)
723{ 1905{
724 ev_clear ((W)w); 1906 clear_pending (EV_A_ (W)w);
725 if (!ev_is_active (w)) 1907 if (expect_false (!ev_is_active (w)))
726 return; 1908 return;
727 1909
728 if (w->active < timercnt--) 1910 {
1911 int active = ev_active (w);
1912
1913 assert (("internal timer heap corruption", timers [active] == (WT)w));
1914
1915 if (expect_true (active < timercnt))
729 { 1916 {
730 timers [w->active - 1] = timers [timercnt]; 1917 timers [active] = timers [timercnt];
731 downheap ((WT *)timers, timercnt, w->active - 1); 1918 adjustheap (timers, timercnt, active);
732 } 1919 }
733 1920
734 w->at = w->repeat; 1921 --timercnt;
1922 }
735 1923
1924 ev_at (w) -= mn_now;
1925
736 ev_stop ((W)w); 1926 ev_stop (EV_A_ (W)w);
737} 1927}
738 1928
739void 1929void noinline
740evtimer_again (struct ev_timer *w) 1930ev_timer_again (EV_P_ ev_timer *w)
741{ 1931{
742 if (ev_is_active (w)) 1932 if (ev_is_active (w))
743 { 1933 {
744 if (w->repeat) 1934 if (w->repeat)
745 { 1935 {
746 w->at = now + w->repeat; 1936 ev_at (w) = mn_now + w->repeat;
747 downheap ((WT *)timers, timercnt, w->active - 1); 1937 adjustheap (timers, timercnt, ev_active (w));
748 } 1938 }
749 else 1939 else
750 evtimer_stop (w); 1940 ev_timer_stop (EV_A_ w);
751 } 1941 }
752 else if (w->repeat) 1942 else if (w->repeat)
1943 {
1944 ev_at (w) = w->repeat;
753 evtimer_start (w); 1945 ev_timer_start (EV_A_ w);
1946 }
754} 1947}
755 1948
756void 1949#if EV_PERIODIC_ENABLE
1950void noinline
757evperiodic_start (struct ev_periodic *w) 1951ev_periodic_start (EV_P_ ev_periodic *w)
758{ 1952{
759 if (ev_is_active (w)) 1953 if (expect_false (ev_is_active (w)))
760 return; 1954 return;
761 1955
762 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 1956 if (w->reschedule_cb)
763 1957 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1958 else if (w->interval)
1959 {
1960 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 */ 1961 /* 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; 1962 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1963 }
1964 else
1965 ev_at (w) = w->offset;
767 1966
768 ev_start ((W)w, ++periodiccnt); 1967 ev_start (EV_A_ (W)w, ++periodiccnt);
769 array_needsize (periodics, periodicmax, periodiccnt, ); 1968 array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2);
770 periodics [periodiccnt - 1] = w; 1969 periodics [periodiccnt] = (WT)w;
771 upheap ((WT *)periodics, periodiccnt - 1); 1970 upheap (periodics, periodiccnt);
772}
773 1971
774void 1972 /*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
1973}
1974
1975void noinline
775evperiodic_stop (struct ev_periodic *w) 1976ev_periodic_stop (EV_P_ ev_periodic *w)
776{ 1977{
777 ev_clear ((W)w); 1978 clear_pending (EV_A_ (W)w);
778 if (!ev_is_active (w)) 1979 if (expect_false (!ev_is_active (w)))
779 return; 1980 return;
780 1981
781 if (w->active < periodiccnt--) 1982 {
1983 int active = ev_active (w);
1984
1985 assert (("internal periodic heap corruption", periodics [active] == (WT)w));
1986
1987 if (expect_true (active < periodiccnt))
782 { 1988 {
783 periodics [w->active - 1] = periodics [periodiccnt]; 1989 periodics [active] = periodics [periodiccnt];
784 downheap ((WT *)periodics, periodiccnt, w->active - 1); 1990 adjustheap (periodics, periodiccnt, active);
785 } 1991 }
786 1992
1993 --periodiccnt;
1994 }
1995
787 ev_stop ((W)w); 1996 ev_stop (EV_A_ (W)w);
788} 1997}
789 1998
790void 1999void noinline
2000ev_periodic_again (EV_P_ ev_periodic *w)
2001{
2002 /* TODO: use adjustheap and recalculation */
2003 ev_periodic_stop (EV_A_ w);
2004 ev_periodic_start (EV_A_ w);
2005}
2006#endif
2007
2008#ifndef SA_RESTART
2009# define SA_RESTART 0
2010#endif
2011
2012void noinline
791evsignal_start (struct ev_signal *w) 2013ev_signal_start (EV_P_ ev_signal *w)
792{ 2014{
2015#if EV_MULTIPLICITY
2016 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2017#endif
793 if (ev_is_active (w)) 2018 if (expect_false (ev_is_active (w)))
794 return; 2019 return;
795 2020
796 ev_start ((W)w, 1); 2021 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2022
2023 evpipe_init (EV_A);
2024
2025 {
2026#ifndef _WIN32
2027 sigset_t full, prev;
2028 sigfillset (&full);
2029 sigprocmask (SIG_SETMASK, &full, &prev);
2030#endif
2031
797 array_needsize (signals, signalmax, w->signum, signals_init); 2032 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2033
2034#ifndef _WIN32
2035 sigprocmask (SIG_SETMASK, &prev, 0);
2036#endif
2037 }
2038
2039 ev_start (EV_A_ (W)w, 1);
798 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2040 wlist_add (&signals [w->signum - 1].head, (WL)w);
799 2041
800 if (!w->next) 2042 if (!((WL)w)->next)
801 { 2043 {
2044#if _WIN32
2045 signal (w->signum, ev_sighandler);
2046#else
802 struct sigaction sa; 2047 struct sigaction sa;
803 sa.sa_handler = sighandler; 2048 sa.sa_handler = ev_sighandler;
804 sigfillset (&sa.sa_mask); 2049 sigfillset (&sa.sa_mask);
805 sa.sa_flags = 0; 2050 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
806 sigaction (w->signum, &sa, 0); 2051 sigaction (w->signum, &sa, 0);
2052#endif
807 } 2053 }
808} 2054}
809 2055
810void 2056void noinline
811evsignal_stop (struct ev_signal *w) 2057ev_signal_stop (EV_P_ ev_signal *w)
812{ 2058{
813 ev_clear ((W)w); 2059 clear_pending (EV_A_ (W)w);
814 if (!ev_is_active (w)) 2060 if (expect_false (!ev_is_active (w)))
815 return; 2061 return;
816 2062
817 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2063 wlist_del (&signals [w->signum - 1].head, (WL)w);
818 ev_stop ((W)w); 2064 ev_stop (EV_A_ (W)w);
819 2065
820 if (!signals [w->signum - 1].head) 2066 if (!signals [w->signum - 1].head)
821 signal (w->signum, SIG_DFL); 2067 signal (w->signum, SIG_DFL);
822} 2068}
823 2069
824void evidle_start (struct ev_idle *w) 2070void
2071ev_child_start (EV_P_ ev_child *w)
825{ 2072{
2073#if EV_MULTIPLICITY
2074 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2075#endif
826 if (ev_is_active (w)) 2076 if (expect_false (ev_is_active (w)))
827 return; 2077 return;
828 2078
829 ev_start ((W)w, ++idlecnt); 2079 ev_start (EV_A_ (W)w, 1);
830 array_needsize (idles, idlemax, idlecnt, ); 2080 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
831 idles [idlecnt - 1] = w;
832} 2081}
833 2082
834void evidle_stop (struct ev_idle *w) 2083void
2084ev_child_stop (EV_P_ ev_child *w)
835{ 2085{
836 ev_clear ((W)w); 2086 clear_pending (EV_A_ (W)w);
837 if (ev_is_active (w)) 2087 if (expect_false (!ev_is_active (w)))
838 return; 2088 return;
839 2089
840 idles [w->active - 1] = idles [--idlecnt]; 2090 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
841 ev_stop ((W)w); 2091 ev_stop (EV_A_ (W)w);
842} 2092}
843 2093
2094#if EV_STAT_ENABLE
2095
2096# ifdef _WIN32
2097# undef lstat
2098# define lstat(a,b) _stati64 (a,b)
2099# endif
2100
2101#define DEF_STAT_INTERVAL 5.0074891
2102#define MIN_STAT_INTERVAL 0.1074891
2103
2104static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2105
2106#if EV_USE_INOTIFY
2107# define EV_INOTIFY_BUFSIZE 8192
2108
2109static void noinline
2110infy_add (EV_P_ ev_stat *w)
2111{
2112 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);
2113
2114 if (w->wd < 0)
2115 {
2116 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2117
2118 /* monitor some parent directory for speedup hints */
2119 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2120 {
2121 char path [4096];
2122 strcpy (path, w->path);
2123
2124 do
2125 {
2126 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2127 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2128
2129 char *pend = strrchr (path, '/');
2130
2131 if (!pend)
2132 break; /* whoops, no '/', complain to your admin */
2133
2134 *pend = 0;
2135 w->wd = inotify_add_watch (fs_fd, path, mask);
2136 }
2137 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2138 }
2139 }
2140 else
2141 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2142
2143 if (w->wd >= 0)
2144 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2145}
2146
2147static void noinline
2148infy_del (EV_P_ ev_stat *w)
2149{
2150 int slot;
2151 int wd = w->wd;
2152
2153 if (wd < 0)
2154 return;
2155
2156 w->wd = -2;
2157 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2158 wlist_del (&fs_hash [slot].head, (WL)w);
2159
2160 /* remove this watcher, if others are watching it, they will rearm */
2161 inotify_rm_watch (fs_fd, wd);
2162}
2163
2164static void noinline
2165infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2166{
2167 if (slot < 0)
2168 /* overflow, need to check for all hahs slots */
2169 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2170 infy_wd (EV_A_ slot, wd, ev);
2171 else
2172 {
2173 WL w_;
2174
2175 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2176 {
2177 ev_stat *w = (ev_stat *)w_;
2178 w_ = w_->next; /* lets us remove this watcher and all before it */
2179
2180 if (w->wd == wd || wd == -1)
2181 {
2182 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2183 {
2184 w->wd = -1;
2185 infy_add (EV_A_ w); /* re-add, no matter what */
2186 }
2187
2188 stat_timer_cb (EV_A_ &w->timer, 0);
2189 }
2190 }
2191 }
2192}
2193
2194static void
2195infy_cb (EV_P_ ev_io *w, int revents)
2196{
2197 char buf [EV_INOTIFY_BUFSIZE];
2198 struct inotify_event *ev = (struct inotify_event *)buf;
2199 int ofs;
2200 int len = read (fs_fd, buf, sizeof (buf));
2201
2202 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2203 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2204}
2205
2206void inline_size
2207infy_init (EV_P)
2208{
2209 if (fs_fd != -2)
2210 return;
2211
2212 fs_fd = inotify_init ();
2213
2214 if (fs_fd >= 0)
2215 {
2216 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2217 ev_set_priority (&fs_w, EV_MAXPRI);
2218 ev_io_start (EV_A_ &fs_w);
2219 }
2220}
2221
2222void inline_size
2223infy_fork (EV_P)
2224{
2225 int slot;
2226
2227 if (fs_fd < 0)
2228 return;
2229
2230 close (fs_fd);
2231 fs_fd = inotify_init ();
2232
2233 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2234 {
2235 WL w_ = fs_hash [slot].head;
2236 fs_hash [slot].head = 0;
2237
2238 while (w_)
2239 {
2240 ev_stat *w = (ev_stat *)w_;
2241 w_ = w_->next; /* lets us add this watcher */
2242
2243 w->wd = -1;
2244
2245 if (fs_fd >= 0)
2246 infy_add (EV_A_ w); /* re-add, no matter what */
2247 else
2248 ev_timer_start (EV_A_ &w->timer);
2249 }
2250
2251 }
2252}
2253
2254#endif
2255
2256void
2257ev_stat_stat (EV_P_ ev_stat *w)
2258{
2259 if (lstat (w->path, &w->attr) < 0)
2260 w->attr.st_nlink = 0;
2261 else if (!w->attr.st_nlink)
2262 w->attr.st_nlink = 1;
2263}
2264
2265static void noinline
2266stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2267{
2268 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2269
2270 /* we copy this here each the time so that */
2271 /* prev has the old value when the callback gets invoked */
2272 w->prev = w->attr;
2273 ev_stat_stat (EV_A_ w);
2274
2275 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2276 if (
2277 w->prev.st_dev != w->attr.st_dev
2278 || w->prev.st_ino != w->attr.st_ino
2279 || w->prev.st_mode != w->attr.st_mode
2280 || w->prev.st_nlink != w->attr.st_nlink
2281 || w->prev.st_uid != w->attr.st_uid
2282 || w->prev.st_gid != w->attr.st_gid
2283 || w->prev.st_rdev != w->attr.st_rdev
2284 || w->prev.st_size != w->attr.st_size
2285 || w->prev.st_atime != w->attr.st_atime
2286 || w->prev.st_mtime != w->attr.st_mtime
2287 || w->prev.st_ctime != w->attr.st_ctime
2288 ) {
2289 #if EV_USE_INOTIFY
2290 infy_del (EV_A_ w);
2291 infy_add (EV_A_ w);
2292 ev_stat_stat (EV_A_ w); /* avoid race... */
2293 #endif
2294
2295 ev_feed_event (EV_A_ w, EV_STAT);
2296 }
2297}
2298
2299void
2300ev_stat_start (EV_P_ ev_stat *w)
2301{
2302 if (expect_false (ev_is_active (w)))
2303 return;
2304
2305 /* since we use memcmp, we need to clear any padding data etc. */
2306 memset (&w->prev, 0, sizeof (ev_statdata));
2307 memset (&w->attr, 0, sizeof (ev_statdata));
2308
2309 ev_stat_stat (EV_A_ w);
2310
2311 if (w->interval < MIN_STAT_INTERVAL)
2312 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2313
2314 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2315 ev_set_priority (&w->timer, ev_priority (w));
2316
2317#if EV_USE_INOTIFY
2318 infy_init (EV_A);
2319
2320 if (fs_fd >= 0)
2321 infy_add (EV_A_ w);
2322 else
2323#endif
2324 ev_timer_start (EV_A_ &w->timer);
2325
2326 ev_start (EV_A_ (W)w, 1);
2327}
2328
2329void
2330ev_stat_stop (EV_P_ ev_stat *w)
2331{
2332 clear_pending (EV_A_ (W)w);
2333 if (expect_false (!ev_is_active (w)))
2334 return;
2335
2336#if EV_USE_INOTIFY
2337 infy_del (EV_A_ w);
2338#endif
2339 ev_timer_stop (EV_A_ &w->timer);
2340
2341 ev_stop (EV_A_ (W)w);
2342}
2343#endif
2344
2345#if EV_IDLE_ENABLE
2346void
2347ev_idle_start (EV_P_ ev_idle *w)
2348{
2349 if (expect_false (ev_is_active (w)))
2350 return;
2351
2352 pri_adjust (EV_A_ (W)w);
2353
2354 {
2355 int active = ++idlecnt [ABSPRI (w)];
2356
2357 ++idleall;
2358 ev_start (EV_A_ (W)w, active);
2359
2360 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2361 idles [ABSPRI (w)][active - 1] = w;
2362 }
2363}
2364
2365void
2366ev_idle_stop (EV_P_ ev_idle *w)
2367{
2368 clear_pending (EV_A_ (W)w);
2369 if (expect_false (!ev_is_active (w)))
2370 return;
2371
2372 {
2373 int active = ev_active (w);
2374
2375 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2376 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2377
2378 ev_stop (EV_A_ (W)w);
2379 --idleall;
2380 }
2381}
2382#endif
2383
2384void
844void evprepare_start (struct ev_prepare *w) 2385ev_prepare_start (EV_P_ ev_prepare *w)
845{ 2386{
846 if (ev_is_active (w)) 2387 if (expect_false (ev_is_active (w)))
847 return; 2388 return;
848 2389
849 ev_start ((W)w, ++preparecnt); 2390 ev_start (EV_A_ (W)w, ++preparecnt);
850 array_needsize (prepares, preparemax, preparecnt, ); 2391 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
851 prepares [preparecnt - 1] = w; 2392 prepares [preparecnt - 1] = w;
852} 2393}
853 2394
2395void
854void evprepare_stop (struct ev_prepare *w) 2396ev_prepare_stop (EV_P_ ev_prepare *w)
855{ 2397{
856 ev_clear ((W)w); 2398 clear_pending (EV_A_ (W)w);
857 if (ev_is_active (w)) 2399 if (expect_false (!ev_is_active (w)))
858 return; 2400 return;
859 2401
2402 {
2403 int active = ev_active (w);
2404
860 prepares [w->active - 1] = prepares [--preparecnt]; 2405 prepares [active - 1] = prepares [--preparecnt];
2406 ev_active (prepares [active - 1]) = active;
2407 }
2408
861 ev_stop ((W)w); 2409 ev_stop (EV_A_ (W)w);
862} 2410}
863 2411
2412void
864void evcheck_start (struct ev_check *w) 2413ev_check_start (EV_P_ ev_check *w)
865{ 2414{
866 if (ev_is_active (w)) 2415 if (expect_false (ev_is_active (w)))
867 return; 2416 return;
868 2417
869 ev_start ((W)w, ++checkcnt); 2418 ev_start (EV_A_ (W)w, ++checkcnt);
870 array_needsize (checks, checkmax, checkcnt, ); 2419 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
871 checks [checkcnt - 1] = w; 2420 checks [checkcnt - 1] = w;
872} 2421}
873 2422
2423void
874void evcheck_stop (struct ev_check *w) 2424ev_check_stop (EV_P_ ev_check *w)
875{ 2425{
876 ev_clear ((W)w); 2426 clear_pending (EV_A_ (W)w);
877 if (ev_is_active (w)) 2427 if (expect_false (!ev_is_active (w)))
878 return; 2428 return;
879 2429
2430 {
2431 int active = ev_active (w);
2432
880 checks [w->active - 1] = checks [--checkcnt]; 2433 checks [active - 1] = checks [--checkcnt];
2434 ev_active (checks [active - 1]) = active;
2435 }
2436
881 ev_stop ((W)w); 2437 ev_stop (EV_A_ (W)w);
882} 2438}
2439
2440#if EV_EMBED_ENABLE
2441void noinline
2442ev_embed_sweep (EV_P_ ev_embed *w)
2443{
2444 ev_loop (w->other, EVLOOP_NONBLOCK);
2445}
2446
2447static void
2448embed_io_cb (EV_P_ ev_io *io, int revents)
2449{
2450 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2451
2452 if (ev_cb (w))
2453 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2454 else
2455 ev_loop (w->other, EVLOOP_NONBLOCK);
2456}
2457
2458static void
2459embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2460{
2461 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2462
2463 {
2464 struct ev_loop *loop = w->other;
2465
2466 while (fdchangecnt)
2467 {
2468 fd_reify (EV_A);
2469 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2470 }
2471 }
2472}
2473
2474#if 0
2475static void
2476embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2477{
2478 ev_idle_stop (EV_A_ idle);
2479}
2480#endif
2481
2482void
2483ev_embed_start (EV_P_ ev_embed *w)
2484{
2485 if (expect_false (ev_is_active (w)))
2486 return;
2487
2488 {
2489 struct ev_loop *loop = w->other;
2490 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2491 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2492 }
2493
2494 ev_set_priority (&w->io, ev_priority (w));
2495 ev_io_start (EV_A_ &w->io);
2496
2497 ev_prepare_init (&w->prepare, embed_prepare_cb);
2498 ev_set_priority (&w->prepare, EV_MINPRI);
2499 ev_prepare_start (EV_A_ &w->prepare);
2500
2501 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2502
2503 ev_start (EV_A_ (W)w, 1);
2504}
2505
2506void
2507ev_embed_stop (EV_P_ ev_embed *w)
2508{
2509 clear_pending (EV_A_ (W)w);
2510 if (expect_false (!ev_is_active (w)))
2511 return;
2512
2513 ev_io_stop (EV_A_ &w->io);
2514 ev_prepare_stop (EV_A_ &w->prepare);
2515
2516 ev_stop (EV_A_ (W)w);
2517}
2518#endif
2519
2520#if EV_FORK_ENABLE
2521void
2522ev_fork_start (EV_P_ ev_fork *w)
2523{
2524 if (expect_false (ev_is_active (w)))
2525 return;
2526
2527 ev_start (EV_A_ (W)w, ++forkcnt);
2528 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2529 forks [forkcnt - 1] = w;
2530}
2531
2532void
2533ev_fork_stop (EV_P_ ev_fork *w)
2534{
2535 clear_pending (EV_A_ (W)w);
2536 if (expect_false (!ev_is_active (w)))
2537 return;
2538
2539 {
2540 int active = ev_active (w);
2541
2542 forks [active - 1] = forks [--forkcnt];
2543 ev_active (forks [active - 1]) = active;
2544 }
2545
2546 ev_stop (EV_A_ (W)w);
2547}
2548#endif
2549
2550#if EV_ASYNC_ENABLE
2551void
2552ev_async_start (EV_P_ ev_async *w)
2553{
2554 if (expect_false (ev_is_active (w)))
2555 return;
2556
2557 evpipe_init (EV_A);
2558
2559 ev_start (EV_A_ (W)w, ++asynccnt);
2560 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2561 asyncs [asynccnt - 1] = w;
2562}
2563
2564void
2565ev_async_stop (EV_P_ ev_async *w)
2566{
2567 clear_pending (EV_A_ (W)w);
2568 if (expect_false (!ev_is_active (w)))
2569 return;
2570
2571 {
2572 int active = ev_active (w);
2573
2574 asyncs [active - 1] = asyncs [--asynccnt];
2575 ev_active (asyncs [active - 1]) = active;
2576 }
2577
2578 ev_stop (EV_A_ (W)w);
2579}
2580
2581void
2582ev_async_send (EV_P_ ev_async *w)
2583{
2584 w->sent = 1;
2585 evpipe_write (EV_A_ &gotasync);
2586}
2587#endif
883 2588
884/*****************************************************************************/ 2589/*****************************************************************************/
885 2590
886struct ev_once 2591struct ev_once
887{ 2592{
888 struct ev_io io; 2593 ev_io io;
889 struct ev_timer to; 2594 ev_timer to;
890 void (*cb)(int revents, void *arg); 2595 void (*cb)(int revents, void *arg);
891 void *arg; 2596 void *arg;
892}; 2597};
893 2598
894static void 2599static void
895once_cb (struct ev_once *once, int revents) 2600once_cb (EV_P_ struct ev_once *once, int revents)
896{ 2601{
897 void (*cb)(int revents, void *arg) = once->cb; 2602 void (*cb)(int revents, void *arg) = once->cb;
898 void *arg = once->arg; 2603 void *arg = once->arg;
899 2604
900 evio_stop (&once->io); 2605 ev_io_stop (EV_A_ &once->io);
901 evtimer_stop (&once->to); 2606 ev_timer_stop (EV_A_ &once->to);
902 free (once); 2607 ev_free (once);
903 2608
904 cb (revents, arg); 2609 cb (revents, arg);
905} 2610}
906 2611
907static void 2612static void
908once_cb_io (struct ev_io *w, int revents) 2613once_cb_io (EV_P_ ev_io *w, int revents)
909{ 2614{
910 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2615 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
911} 2616}
912 2617
913static void 2618static void
914once_cb_to (struct ev_timer *w, int revents) 2619once_cb_to (EV_P_ ev_timer *w, int revents)
915{ 2620{
916 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2621 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
917} 2622}
918 2623
919void 2624void
920ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2625ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
921{ 2626{
922 struct ev_once *once = malloc (sizeof (struct ev_once)); 2627 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
923 2628
924 if (!once) 2629 if (expect_false (!once))
925 cb (EV_ERROR, arg); 2630 {
926 else 2631 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
2632 return;
927 { 2633 }
2634
928 once->cb = cb; 2635 once->cb = cb;
929 once->arg = arg; 2636 once->arg = arg;
930 2637
931 evw_init (&once->io, once_cb_io); 2638 ev_init (&once->io, once_cb_io);
932
933 if (fd >= 0) 2639 if (fd >= 0)
934 { 2640 {
935 evio_set (&once->io, fd, events); 2641 ev_io_set (&once->io, fd, events);
936 evio_start (&once->io); 2642 ev_io_start (EV_A_ &once->io);
937 } 2643 }
938 2644
939 evw_init (&once->to, once_cb_to); 2645 ev_init (&once->to, once_cb_to);
940
941 if (timeout >= 0.) 2646 if (timeout >= 0.)
942 { 2647 {
943 evtimer_set (&once->to, timeout, 0.); 2648 ev_timer_set (&once->to, timeout, 0.);
944 evtimer_start (&once->to); 2649 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 { 2650 }
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} 2651}
1026 2652
2653#if EV_MULTIPLICITY
2654 #include "ev_wrap.h"
1027#endif 2655#endif
1028 2656
2657#ifdef __cplusplus
2658}
2659#endif
1029 2660
1030
1031

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