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Comparing libev/ev.c (file contents):
Revision 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs.
Revision 1.235 by root, Wed May 7 14:45:17 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
525#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
526
527int inline_size
528array_nextsize (int elem, int cur, int cnt)
529{
530 int ncur = cur + 1;
531
532 do
533 ncur <<= 1;
534 while (cnt > ncur);
535
536 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
537 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
538 {
539 ncur *= elem;
540 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
541 ncur = ncur - sizeof (void *) * 4;
542 ncur /= elem;
543 }
544
545 return ncur;
546}
547
548static noinline void *
549array_realloc (int elem, void *base, int *cur, int cnt)
550{
551 *cur = array_nextsize (elem, *cur, cnt);
552 return ev_realloc (base, elem * *cur);
553}
554
555#define array_needsize(type,base,cur,cnt,init) \
556 if (expect_false ((cnt) > (cur))) \
557 { \
558 int ocur_ = (cur); \
559 (base) = (type *)array_realloc \
560 (sizeof (type), (base), &(cur), (cnt)); \
561 init ((base) + (ocur_), (cur) - ocur_); \
562 }
563
564#if 0
565#define array_slim(type,stem) \
566 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
567 { \
568 stem ## max = array_roundsize (stem ## cnt >> 1); \
569 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
570 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
571 }
572#endif
573
574#define array_free(stem, idx) \
575 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
576
577/*****************************************************************************/
578
579void noinline
580ev_feed_event (EV_P_ void *w, int revents)
581{
582 W w_ = (W)w;
583 int pri = ABSPRI (w_);
584
585 if (expect_false (w_->pending))
586 pendings [pri][w_->pending - 1].events |= revents;
587 else
588 {
589 w_->pending = ++pendingcnt [pri];
590 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
591 pendings [pri][w_->pending - 1].w = w_;
592 pendings [pri][w_->pending - 1].events = revents;
593 }
594}
595
596void inline_speed
597queue_events (EV_P_ W *events, int eventcnt, int type)
598{
599 int i;
600
601 for (i = 0; i < eventcnt; ++i)
602 ev_feed_event (EV_A_ events [i], type);
603}
604
605/*****************************************************************************/
606
607void inline_size
608anfds_init (ANFD *base, int count)
609{
610 while (count--)
611 {
612 base->head = 0;
613 base->events = EV_NONE;
614 base->reify = 0;
615
616 ++base;
617 }
618}
619
620void inline_speed
621fd_event (EV_P_ int fd, int revents)
622{
623 ANFD *anfd = anfds + fd;
624 ev_io *w;
625
626 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
627 {
628 int ev = w->events & revents;
629
630 if (ev)
631 ev_feed_event (EV_A_ (W)w, ev);
632 }
633}
634
635void
636ev_feed_fd_event (EV_P_ int fd, int revents)
637{
638 if (fd >= 0 && fd < anfdmax)
639 fd_event (EV_A_ fd, revents);
640}
641
642void inline_size
643fd_reify (EV_P)
644{
645 int i;
646
647 for (i = 0; i < fdchangecnt; ++i)
648 {
649 int fd = fdchanges [i];
650 ANFD *anfd = anfds + fd;
651 ev_io *w;
652
653 unsigned char events = 0;
654
655 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
656 events |= (unsigned char)w->events;
657
658#if EV_SELECT_IS_WINSOCKET
659 if (events)
660 {
661 unsigned long argp;
662 #ifdef EV_FD_TO_WIN32_HANDLE
663 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
664 #else
665 anfd->handle = _get_osfhandle (fd);
666 #endif
667 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
668 }
669#endif
670
671 {
672 unsigned char o_events = anfd->events;
673 unsigned char o_reify = anfd->reify;
674
675 anfd->reify = 0;
676 anfd->events = events;
677
678 if (o_events != events || o_reify & EV_IOFDSET)
679 backend_modify (EV_A_ fd, o_events, events);
680 }
681 }
682
683 fdchangecnt = 0;
684}
685
686void inline_size
687fd_change (EV_P_ int fd, int flags)
688{
689 unsigned char reify = anfds [fd].reify;
690 anfds [fd].reify |= flags;
691
692 if (expect_true (!reify))
693 {
694 ++fdchangecnt;
695 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
696 fdchanges [fdchangecnt - 1] = fd;
697 }
698}
699
700void inline_speed
701fd_kill (EV_P_ int fd)
702{
703 ev_io *w;
704
705 while ((w = (ev_io *)anfds [fd].head))
706 {
707 ev_io_stop (EV_A_ w);
708 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
709 }
710}
711
712int inline_size
713fd_valid (int fd)
714{
715#ifdef _WIN32
716 return _get_osfhandle (fd) != -1;
717#else
718 return fcntl (fd, F_GETFD) != -1;
719#endif
720}
721
722/* called on EBADF to verify fds */
723static void noinline
724fd_ebadf (EV_P)
725{
726 int fd;
727
728 for (fd = 0; fd < anfdmax; ++fd)
729 if (anfds [fd].events)
730 if (!fd_valid (fd) == -1 && errno == EBADF)
731 fd_kill (EV_A_ fd);
732}
733
734/* called on ENOMEM in select/poll to kill some fds and retry */
735static void noinline
736fd_enomem (EV_P)
737{
738 int fd;
739
740 for (fd = anfdmax; fd--; )
741 if (anfds [fd].events)
742 {
743 fd_kill (EV_A_ fd);
744 return;
745 }
746}
747
748/* usually called after fork if backend needs to re-arm all fds from scratch */
749static void noinline
750fd_rearm_all (EV_P)
751{
752 int fd;
753
754 for (fd = 0; fd < anfdmax; ++fd)
755 if (anfds [fd].events)
756 {
757 anfds [fd].events = 0;
758 fd_change (EV_A_ fd, EV_IOFDSET | 1);
759 }
760}
761
762/*****************************************************************************/
763
764/*
765 * at the moment we allow libev the luxury of two heaps,
766 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
767 * which is more cache-efficient.
768 * the difference is about 5% with 50000+ watchers.
769 */
770#define USE_4HEAP !EV_MINIMAL
771#if USE_4HEAP
772
773#define HEAP0 3 /* index of first element in heap */
774
775/* towards the root */
776void inline_speed
777upheap (WT *heap, int k)
778{
779 WT w = heap [k];
780
781 for (;;)
782 {
783 int p = ((k - HEAP0 - 1) / 4) + HEAP0;
784
785 if (p >= HEAP0 || heap [p]->at <= w->at)
786 break;
787
788 heap [k] = heap [p];
789 ev_active (heap [k]) = k;
790 k = p;
791 }
792
793 heap [k] = w;
794 ev_active (heap [k]) = k;
795}
796
797/* away from the root */
798void inline_speed
799downheap (WT *heap, int N, int k)
800{
801 WT w = heap [k];
802 WT *E = heap + N + HEAP0;
803
804 for (;;)
805 {
806 ev_tstamp minat;
807 WT *minpos;
808 WT *pos = heap + 4 * (k - HEAP0) + HEAP0;
809
810 // find minimum child
811 if (expect_true (pos +3 < E))
812 {
813 (minpos = pos + 0), (minat = (*minpos)->at);
814 if (pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
815 if (pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
816 if (pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
817 }
818 else
819 {
820 if (pos >= E)
821 break;
822
823 (minpos = pos + 0), (minat = (*minpos)->at);
824 if (pos + 1 < E && pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
825 if (pos + 2 < E && pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
826 if (pos + 3 < E && pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
827 }
828
829 if (w->at <= minat)
830 break;
831
832 ev_active (*minpos) = k;
833 heap [k] = *minpos;
834
835 k = minpos - heap;
836 }
837
838 heap [k] = w;
839 ev_active (heap [k]) = k;
840}
841
842#else // 4HEAP
843
844#define HEAP0 1
845
846/* towards the root */
847void inline_speed
848upheap (WT *heap, int k)
849{
850 WT w = heap [k];
851
852 for (;;)
853 {
854 int p = k >> 1;
855
856 /* maybe we could use a dummy element at heap [0]? */
857 if (!p || heap [p]->at <= w->at)
858 break;
859
860 heap [k] = heap [p];
861 ev_active (heap [k]) = k;
862 k = p;
863 }
864
865 heap [k] = w;
866 ev_active (heap [k]) = k;
867}
868
869/* away from the root */
870void inline_speed
871downheap (WT *heap, int N, int k)
872{
873 WT w = heap [k];
874
875 for (;;)
876 {
877 int c = k << 1;
878
879 if (c > N)
880 break;
881
882 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
883 ? 1 : 0;
884
885 if (w->at <= heap [c]->at)
886 break;
887
888 heap [k] = heap [c];
889 ((W)heap [k])->active = k;
890
891 k = c;
892 }
893
894 heap [k] = w;
895 ev_active (heap [k]) = k;
896}
897#endif
898
899void inline_size
900adjustheap (WT *heap, int N, int k)
901{
902 upheap (heap, k);
903 downheap (heap, N, k);
904}
905
906/*****************************************************************************/
907
123typedef struct 908typedef struct
124{ 909{
125 struct ev_io *head; 910 WL head;
126 unsigned char wev, rev; /* want, received event set */ 911 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; 912} ANSIG;
260 913
261static ANSIG *signals; 914static ANSIG *signals;
262static int signalmax; 915static int signalmax;
263 916
264static int sigpipe [2]; 917static EV_ATOMIC_T gotsig;
265static sig_atomic_t gotsig;
266static struct ev_io sigev;
267 918
268static void 919void inline_size
269signals_init (ANSIG *base, int count) 920signals_init (ANSIG *base, int count)
270{ 921{
271 while (count--) 922 while (count--)
272 { 923 {
273 base->head = 0; 924 base->head = 0;
274 base->gotsig = 0; 925 base->gotsig = 0;
926
275 ++base; 927 ++base;
276 } 928 }
277} 929}
278 930
931/*****************************************************************************/
932
933void inline_speed
934fd_intern (int fd)
935{
936#ifdef _WIN32
937 int arg = 1;
938 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
939#else
940 fcntl (fd, F_SETFD, FD_CLOEXEC);
941 fcntl (fd, F_SETFL, O_NONBLOCK);
942#endif
943}
944
945static void noinline
946evpipe_init (EV_P)
947{
948 if (!ev_is_active (&pipeev))
949 {
950#if EV_USE_EVENTFD
951 if ((evfd = eventfd (0, 0)) >= 0)
952 {
953 evpipe [0] = -1;
954 fd_intern (evfd);
955 ev_io_set (&pipeev, evfd, EV_READ);
956 }
957 else
958#endif
959 {
960 while (pipe (evpipe))
961 syserr ("(libev) error creating signal/async pipe");
962
963 fd_intern (evpipe [0]);
964 fd_intern (evpipe [1]);
965 ev_io_set (&pipeev, evpipe [0], EV_READ);
966 }
967
968 ev_io_start (EV_A_ &pipeev);
969 ev_unref (EV_A); /* watcher should not keep loop alive */
970 }
971}
972
973void inline_size
974evpipe_write (EV_P_ EV_ATOMIC_T *flag)
975{
976 if (!*flag)
977 {
978 int old_errno = errno; /* save errno because write might clobber it */
979
980 *flag = 1;
981
982#if EV_USE_EVENTFD
983 if (evfd >= 0)
984 {
985 uint64_t counter = 1;
986 write (evfd, &counter, sizeof (uint64_t));
987 }
988 else
989#endif
990 write (evpipe [1], &old_errno, 1);
991
992 errno = old_errno;
993 }
994}
995
279static void 996static void
997pipecb (EV_P_ ev_io *iow, int revents)
998{
999#if EV_USE_EVENTFD
1000 if (evfd >= 0)
1001 {
1002 uint64_t counter;
1003 read (evfd, &counter, sizeof (uint64_t));
1004 }
1005 else
1006#endif
1007 {
1008 char dummy;
1009 read (evpipe [0], &dummy, 1);
1010 }
1011
1012 if (gotsig && ev_is_default_loop (EV_A))
1013 {
1014 int signum;
1015 gotsig = 0;
1016
1017 for (signum = signalmax; signum--; )
1018 if (signals [signum].gotsig)
1019 ev_feed_signal_event (EV_A_ signum + 1);
1020 }
1021
1022#if EV_ASYNC_ENABLE
1023 if (gotasync)
1024 {
1025 int i;
1026 gotasync = 0;
1027
1028 for (i = asynccnt; i--; )
1029 if (asyncs [i]->sent)
1030 {
1031 asyncs [i]->sent = 0;
1032 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1033 }
1034 }
1035#endif
1036}
1037
1038/*****************************************************************************/
1039
1040static void
280sighandler (int signum) 1041ev_sighandler (int signum)
281{ 1042{
1043#if EV_MULTIPLICITY
1044 struct ev_loop *loop = &default_loop_struct;
1045#endif
1046
1047#if _WIN32
1048 signal (signum, ev_sighandler);
1049#endif
1050
282 signals [signum - 1].gotsig = 1; 1051 signals [signum - 1].gotsig = 1;
1052 evpipe_write (EV_A_ &gotsig);
1053}
283 1054
284 if (!gotsig) 1055void noinline
1056ev_feed_signal_event (EV_P_ int signum)
1057{
1058 WL w;
1059
1060#if EV_MULTIPLICITY
1061 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1062#endif
1063
1064 --signum;
1065
1066 if (signum < 0 || signum >= signalmax)
1067 return;
1068
1069 signals [signum].gotsig = 0;
1070
1071 for (w = signals [signum].head; w; w = w->next)
1072 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1073}
1074
1075/*****************************************************************************/
1076
1077static WL childs [EV_PID_HASHSIZE];
1078
1079#ifndef _WIN32
1080
1081static ev_signal childev;
1082
1083#ifndef WIFCONTINUED
1084# define WIFCONTINUED(status) 0
1085#endif
1086
1087void inline_speed
1088child_reap (EV_P_ int chain, int pid, int status)
1089{
1090 ev_child *w;
1091 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1092
1093 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1094 {
1095 if ((w->pid == pid || !w->pid)
1096 && (!traced || (w->flags & 1)))
1097 {
1098 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1099 w->rpid = pid;
1100 w->rstatus = status;
1101 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1102 }
1103 }
1104}
1105
1106#ifndef WCONTINUED
1107# define WCONTINUED 0
1108#endif
1109
1110static void
1111childcb (EV_P_ ev_signal *sw, int revents)
1112{
1113 int pid, status;
1114
1115 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1116 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1117 if (!WCONTINUED
1118 || errno != EINVAL
1119 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1120 return;
1121
1122 /* make sure we are called again until all children have been reaped */
1123 /* we need to do it this way so that the callback gets called before we continue */
1124 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1125
1126 child_reap (EV_A_ pid, pid, status);
1127 if (EV_PID_HASHSIZE > 1)
1128 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1129}
1130
1131#endif
1132
1133/*****************************************************************************/
1134
1135#if EV_USE_PORT
1136# include "ev_port.c"
1137#endif
1138#if EV_USE_KQUEUE
1139# include "ev_kqueue.c"
1140#endif
1141#if EV_USE_EPOLL
1142# include "ev_epoll.c"
1143#endif
1144#if EV_USE_POLL
1145# include "ev_poll.c"
1146#endif
1147#if EV_USE_SELECT
1148# include "ev_select.c"
1149#endif
1150
1151int
1152ev_version_major (void)
1153{
1154 return EV_VERSION_MAJOR;
1155}
1156
1157int
1158ev_version_minor (void)
1159{
1160 return EV_VERSION_MINOR;
1161}
1162
1163/* return true if we are running with elevated privileges and should ignore env variables */
1164int inline_size
1165enable_secure (void)
1166{
1167#ifdef _WIN32
1168 return 0;
1169#else
1170 return getuid () != geteuid ()
1171 || getgid () != getegid ();
1172#endif
1173}
1174
1175unsigned int
1176ev_supported_backends (void)
1177{
1178 unsigned int flags = 0;
1179
1180 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1181 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1182 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1183 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1184 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1185
1186 return flags;
1187}
1188
1189unsigned int
1190ev_recommended_backends (void)
1191{
1192 unsigned int flags = ev_supported_backends ();
1193
1194#ifndef __NetBSD__
1195 /* kqueue is borked on everything but netbsd apparently */
1196 /* it usually doesn't work correctly on anything but sockets and pipes */
1197 flags &= ~EVBACKEND_KQUEUE;
1198#endif
1199#ifdef __APPLE__
1200 // flags &= ~EVBACKEND_KQUEUE; for documentation
1201 flags &= ~EVBACKEND_POLL;
1202#endif
1203
1204 return flags;
1205}
1206
1207unsigned int
1208ev_embeddable_backends (void)
1209{
1210 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1211
1212 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1213 /* please fix it and tell me how to detect the fix */
1214 flags &= ~EVBACKEND_EPOLL;
1215
1216 return flags;
1217}
1218
1219unsigned int
1220ev_backend (EV_P)
1221{
1222 return backend;
1223}
1224
1225unsigned int
1226ev_loop_count (EV_P)
1227{
1228 return loop_count;
1229}
1230
1231void
1232ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1233{
1234 io_blocktime = interval;
1235}
1236
1237void
1238ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1239{
1240 timeout_blocktime = interval;
1241}
1242
1243static void noinline
1244loop_init (EV_P_ unsigned int flags)
1245{
1246 if (!backend)
1247 {
1248#if EV_USE_MONOTONIC
285 { 1249 {
1250 struct timespec ts;
1251 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1252 have_monotonic = 1;
1253 }
1254#endif
1255
1256 ev_rt_now = ev_time ();
1257 mn_now = get_clock ();
1258 now_floor = mn_now;
1259 rtmn_diff = ev_rt_now - mn_now;
1260
1261 io_blocktime = 0.;
1262 timeout_blocktime = 0.;
1263 backend = 0;
1264 backend_fd = -1;
1265 gotasync = 0;
1266#if EV_USE_INOTIFY
1267 fs_fd = -2;
1268#endif
1269
1270 /* pid check not overridable via env */
1271#ifndef _WIN32
1272 if (flags & EVFLAG_FORKCHECK)
1273 curpid = getpid ();
1274#endif
1275
1276 if (!(flags & EVFLAG_NOENV)
1277 && !enable_secure ()
1278 && getenv ("LIBEV_FLAGS"))
1279 flags = atoi (getenv ("LIBEV_FLAGS"));
1280
1281 if (!(flags & 0x0000ffffU))
1282 flags |= ev_recommended_backends ();
1283
1284#if EV_USE_PORT
1285 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1286#endif
1287#if EV_USE_KQUEUE
1288 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1289#endif
1290#if EV_USE_EPOLL
1291 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1292#endif
1293#if EV_USE_POLL
1294 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1295#endif
1296#if EV_USE_SELECT
1297 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1298#endif
1299
1300 ev_init (&pipeev, pipecb);
1301 ev_set_priority (&pipeev, EV_MAXPRI);
1302 }
1303}
1304
1305static void noinline
1306loop_destroy (EV_P)
1307{
1308 int i;
1309
1310 if (ev_is_active (&pipeev))
1311 {
1312 ev_ref (EV_A); /* signal watcher */
1313 ev_io_stop (EV_A_ &pipeev);
1314
1315#if EV_USE_EVENTFD
1316 if (evfd >= 0)
1317 close (evfd);
1318#endif
1319
1320 if (evpipe [0] >= 0)
1321 {
1322 close (evpipe [0]);
1323 close (evpipe [1]);
1324 }
1325 }
1326
1327#if EV_USE_INOTIFY
1328 if (fs_fd >= 0)
1329 close (fs_fd);
1330#endif
1331
1332 if (backend_fd >= 0)
1333 close (backend_fd);
1334
1335#if EV_USE_PORT
1336 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1337#endif
1338#if EV_USE_KQUEUE
1339 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1340#endif
1341#if EV_USE_EPOLL
1342 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1343#endif
1344#if EV_USE_POLL
1345 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1346#endif
1347#if EV_USE_SELECT
1348 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1349#endif
1350
1351 for (i = NUMPRI; i--; )
1352 {
1353 array_free (pending, [i]);
1354#if EV_IDLE_ENABLE
1355 array_free (idle, [i]);
1356#endif
1357 }
1358
1359 ev_free (anfds); anfdmax = 0;
1360
1361 /* have to use the microsoft-never-gets-it-right macro */
1362 array_free (fdchange, EMPTY);
1363 array_free (timer, EMPTY);
1364#if EV_PERIODIC_ENABLE
1365 array_free (periodic, EMPTY);
1366#endif
1367#if EV_FORK_ENABLE
1368 array_free (fork, EMPTY);
1369#endif
1370 array_free (prepare, EMPTY);
1371 array_free (check, EMPTY);
1372#if EV_ASYNC_ENABLE
1373 array_free (async, EMPTY);
1374#endif
1375
1376 backend = 0;
1377}
1378
1379#if EV_USE_INOTIFY
1380void inline_size infy_fork (EV_P);
1381#endif
1382
1383void inline_size
1384loop_fork (EV_P)
1385{
1386#if EV_USE_PORT
1387 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1388#endif
1389#if EV_USE_KQUEUE
1390 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1391#endif
1392#if EV_USE_EPOLL
1393 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1394#endif
1395#if EV_USE_INOTIFY
1396 infy_fork (EV_A);
1397#endif
1398
1399 if (ev_is_active (&pipeev))
1400 {
1401 /* this "locks" the handlers against writing to the pipe */
1402 /* while we modify the fd vars */
286 gotsig = 1; 1403 gotsig = 1;
287 write (sigpipe [1], &gotsig, 1); 1404#if EV_ASYNC_ENABLE
1405 gotasync = 1;
1406#endif
1407
1408 ev_ref (EV_A);
1409 ev_io_stop (EV_A_ &pipeev);
1410
1411#if EV_USE_EVENTFD
1412 if (evfd >= 0)
1413 close (evfd);
1414#endif
1415
1416 if (evpipe [0] >= 0)
1417 {
1418 close (evpipe [0]);
1419 close (evpipe [1]);
1420 }
1421
1422 evpipe_init (EV_A);
1423 /* now iterate over everything, in case we missed something */
1424 pipecb (EV_A_ &pipeev, EV_READ);
1425 }
1426
1427 postfork = 0;
1428}
1429
1430#if EV_MULTIPLICITY
1431struct ev_loop *
1432ev_loop_new (unsigned int flags)
1433{
1434 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1435
1436 memset (loop, 0, sizeof (struct ev_loop));
1437
1438 loop_init (EV_A_ flags);
1439
1440 if (ev_backend (EV_A))
1441 return loop;
1442
1443 return 0;
1444}
1445
1446void
1447ev_loop_destroy (EV_P)
1448{
1449 loop_destroy (EV_A);
1450 ev_free (loop);
1451}
1452
1453void
1454ev_loop_fork (EV_P)
1455{
1456 postfork = 1; /* must be in line with ev_default_fork */
1457}
1458#endif
1459
1460#if EV_MULTIPLICITY
1461struct ev_loop *
1462ev_default_loop_init (unsigned int flags)
1463#else
1464int
1465ev_default_loop (unsigned int flags)
1466#endif
1467{
1468 if (!ev_default_loop_ptr)
288 } 1469 {
289} 1470#if EV_MULTIPLICITY
1471 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1472#else
1473 ev_default_loop_ptr = 1;
1474#endif
290 1475
291static void 1476 loop_init (EV_A_ flags);
292sigcb (struct ev_io *iow, int revents) 1477
1478 if (ev_backend (EV_A))
1479 {
1480#ifndef _WIN32
1481 ev_signal_init (&childev, childcb, SIGCHLD);
1482 ev_set_priority (&childev, EV_MAXPRI);
1483 ev_signal_start (EV_A_ &childev);
1484 ev_unref (EV_A); /* child watcher should not keep loop alive */
1485#endif
1486 }
1487 else
1488 ev_default_loop_ptr = 0;
1489 }
1490
1491 return ev_default_loop_ptr;
1492}
1493
1494void
1495ev_default_destroy (void)
293{ 1496{
294 struct ev_signal *w; 1497#if EV_MULTIPLICITY
1498 struct ev_loop *loop = ev_default_loop_ptr;
1499#endif
1500
1501#ifndef _WIN32
1502 ev_ref (EV_A); /* child watcher */
1503 ev_signal_stop (EV_A_ &childev);
1504#endif
1505
1506 loop_destroy (EV_A);
1507}
1508
1509void
1510ev_default_fork (void)
1511{
1512#if EV_MULTIPLICITY
1513 struct ev_loop *loop = ev_default_loop_ptr;
1514#endif
1515
1516 if (backend)
1517 postfork = 1; /* must be in line with ev_loop_fork */
1518}
1519
1520/*****************************************************************************/
1521
1522void
1523ev_invoke (EV_P_ void *w, int revents)
1524{
1525 EV_CB_INVOKE ((W)w, revents);
1526}
1527
1528void inline_speed
1529call_pending (EV_P)
1530{
295 int sig; 1531 int pri;
296 1532
297 gotsig = 0; 1533 for (pri = NUMPRI; pri--; )
298 read (sigpipe [0], &revents, 1); 1534 while (pendingcnt [pri])
299
300 for (sig = signalmax; sig--; )
301 if (signals [sig].gotsig)
302 { 1535 {
303 signals [sig].gotsig = 0; 1536 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
304 1537
305 for (w = signals [sig].head; w; w = w->next) 1538 if (expect_true (p->w))
306 event ((W)w, EV_SIGNAL); 1539 {
1540 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1541
1542 p->w->pending = 0;
1543 EV_CB_INVOKE (p->w, p->events);
1544 }
307 } 1545 }
308} 1546}
309 1547
310static void 1548#if EV_IDLE_ENABLE
311siginit (void) 1549void inline_size
1550idle_reify (EV_P)
312{ 1551{
313 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC); 1552 if (expect_false (idleall))
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_check **checks;
330static int checkmax, checkcnt;
331
332/*****************************************************************************/
333
334#if HAVE_EPOLL
335# include "ev_epoll.c"
336#endif
337#if HAVE_SELECT
338# include "ev_select.c"
339#endif
340
341int ev_init (int flags)
342{
343#if HAVE_MONOTONIC
344 {
345 struct timespec ts;
346 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
347 have_monotonic = 1;
348 }
349#endif
350
351 ev_now = ev_time ();
352 now = get_clock ();
353 diff = ev_now - now;
354
355 if (pipe (sigpipe))
356 return 0;
357
358 ev_method = EVMETHOD_NONE;
359#if HAVE_EPOLL
360 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
361#endif
362#if HAVE_SELECT
363 if (ev_method == EVMETHOD_NONE) select_init (flags);
364#endif
365
366 if (ev_method)
367 {
368 evw_init (&sigev, sigcb);
369 siginit ();
370 } 1553 {
1554 int pri;
371 1555
372 return ev_method; 1556 for (pri = NUMPRI; pri--; )
373}
374
375/*****************************************************************************/
376
377void ev_prefork (void)
378{
379 /* nop */
380}
381
382void ev_postfork_parent (void)
383{
384 /* nop */
385}
386
387void ev_postfork_child (void)
388{
389#if HAVE_EPOLL
390 if (ev_method == EVMETHOD_EPOLL)
391 epoll_postfork_child ();
392#endif
393
394 evio_stop (&sigev);
395 close (sigpipe [0]);
396 close (sigpipe [1]);
397 pipe (sigpipe);
398 siginit ();
399}
400
401/*****************************************************************************/
402
403static void
404fd_reify (void)
405{
406 int i;
407
408 for (i = 0; i < fdchangecnt; ++i)
409 {
410 int fd = fdchanges [i];
411 ANFD *anfd = anfds + fd;
412 struct ev_io *w;
413
414 int wev = 0;
415
416 for (w = anfd->head; w; w = w->next)
417 wev |= w->events;
418
419 if (anfd->wev != wev)
420 { 1557 {
421 method_modify (fd, anfd->wev, wev); 1558 if (pendingcnt [pri])
422 anfd->wev = wev; 1559 break;
1560
1561 if (idlecnt [pri])
1562 {
1563 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1564 break;
1565 }
423 } 1566 }
424 } 1567 }
425
426 fdchangecnt = 0;
427} 1568}
1569#endif
428 1570
429static void 1571void inline_size
430call_pending ()
431{
432 while (pendingcnt)
433 {
434 ANPENDING *p = pendings + --pendingcnt;
435
436 if (p->w)
437 {
438 p->w->pending = 0;
439 p->w->cb (p->w, p->events);
440 }
441 }
442}
443
444static void
445timers_reify () 1572timers_reify (EV_P)
446{ 1573{
447 while (timercnt && timers [0]->at <= now) 1574 while (timercnt && ev_at (timers [HEAP0]) <= mn_now)
448 { 1575 {
449 struct ev_timer *w = timers [0]; 1576 ev_timer *w = (ev_timer *)timers [HEAP0];
450 1577
451 event ((W)w, EV_TIMEOUT); 1578 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
452 1579
453 /* first reschedule or stop timer */ 1580 /* first reschedule or stop timer */
454 if (w->repeat) 1581 if (w->repeat)
455 { 1582 {
456 w->at = now + w->repeat; 1583 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
457 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1584
1585 ev_at (w) += w->repeat;
1586 if (ev_at (w) < mn_now)
1587 ev_at (w) = mn_now;
1588
458 downheap ((WT *)timers, timercnt, 0); 1589 downheap (timers, timercnt, HEAP0);
459 } 1590 }
460 else 1591 else
461 evtimer_stop (w); /* nonrepeating: stop timer */ 1592 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
462 }
463}
464 1593
465static void 1594 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1595 }
1596}
1597
1598#if EV_PERIODIC_ENABLE
1599void inline_size
466periodics_reify () 1600periodics_reify (EV_P)
467{ 1601{
468 while (periodiccnt && periodics [0]->at <= ev_now) 1602 while (periodiccnt && ev_at (periodics [HEAP0]) <= ev_rt_now)
469 { 1603 {
470 struct ev_periodic *w = periodics [0]; 1604 ev_periodic *w = (ev_periodic *)periodics [HEAP0];
1605
1606 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
471 1607
472 /* first reschedule or stop timer */ 1608 /* first reschedule or stop timer */
473 if (w->interval) 1609 if (w->reschedule_cb)
474 { 1610 {
475 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1611 ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
476 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1612 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
477 downheap ((WT *)periodics, periodiccnt, 0); 1613 downheap (periodics, periodiccnt, 1);
1614 }
1615 else if (w->interval)
1616 {
1617 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1618 if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
1619 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
1620 downheap (periodics, periodiccnt, HEAP0);
478 } 1621 }
479 else 1622 else
480 evperiodic_stop (w); /* nonrepeating: stop timer */ 1623 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
481 1624
482 event ((W)w, EV_TIMEOUT); 1625 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
483 } 1626 }
484} 1627}
485 1628
486static void 1629static void noinline
487periodics_reschedule (ev_tstamp diff) 1630periodics_reschedule (EV_P)
488{ 1631{
489 int i; 1632 int i;
490 1633
491 /* adjust periodics after time jump */ 1634 /* adjust periodics after time jump */
492 for (i = 0; i < periodiccnt; ++i) 1635 for (i = 1; i <= periodiccnt; ++i)
493 { 1636 {
494 struct ev_periodic *w = periodics [i]; 1637 ev_periodic *w = (ev_periodic *)periodics [i];
495 1638
1639 if (w->reschedule_cb)
1640 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
496 if (w->interval) 1641 else if (w->interval)
1642 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1643 }
1644
1645 /* now rebuild the heap */
1646 for (i = periodiccnt >> 1; --i; )
1647 downheap (periodics, periodiccnt, i + HEAP0);
1648}
1649#endif
1650
1651void inline_speed
1652time_update (EV_P_ ev_tstamp max_block)
1653{
1654 int i;
1655
1656#if EV_USE_MONOTONIC
1657 if (expect_true (have_monotonic))
1658 {
1659 ev_tstamp odiff = rtmn_diff;
1660
1661 mn_now = get_clock ();
1662
1663 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1664 /* interpolate in the meantime */
1665 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
497 { 1666 {
498 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1667 ev_rt_now = rtmn_diff + mn_now;
499 1668 return;
500 if (fabs (diff) >= 1e-4)
501 {
502 evperiodic_stop (w);
503 evperiodic_start (w);
504
505 i = 0; /* restart loop, inefficient, but time jumps should be rare */
506 }
507 } 1669 }
508 }
509}
510 1670
511static void 1671 now_floor = mn_now;
512time_update ()
513{
514 int i;
515
516 ev_now = ev_time (); 1672 ev_rt_now = ev_time ();
517 1673
518 if (have_monotonic)
519 {
520 ev_tstamp odiff = diff;
521
522 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1674 /* loop a few times, before making important decisions.
1675 * on the choice of "4": one iteration isn't enough,
1676 * in case we get preempted during the calls to
1677 * ev_time and get_clock. a second call is almost guaranteed
1678 * to succeed in that case, though. and looping a few more times
1679 * doesn't hurt either as we only do this on time-jumps or
1680 * in the unlikely event of having been preempted here.
1681 */
1682 for (i = 4; --i; )
523 { 1683 {
524 now = get_clock ();
525 diff = ev_now - now; 1684 rtmn_diff = ev_rt_now - mn_now;
526 1685
527 if (fabs (odiff - diff) < MIN_TIMEJUMP) 1686 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
528 return; /* all is well */ 1687 return; /* all is well */
529 1688
530 ev_now = ev_time (); 1689 ev_rt_now = ev_time ();
1690 mn_now = get_clock ();
1691 now_floor = mn_now;
531 } 1692 }
532 1693
1694# if EV_PERIODIC_ENABLE
533 periodics_reschedule (diff - odiff); 1695 periodics_reschedule (EV_A);
1696# endif
534 /* no timer adjustment, as the monotonic clock doesn't jump */ 1697 /* no timer adjustment, as the monotonic clock doesn't jump */
1698 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
535 } 1699 }
536 else 1700 else
1701#endif
537 { 1702 {
538 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 1703 ev_rt_now = ev_time ();
1704
1705 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
539 { 1706 {
1707#if EV_PERIODIC_ENABLE
540 periodics_reschedule (ev_now - now); 1708 periodics_reschedule (EV_A);
541 1709#endif
542 /* adjust timers. this is easy, as the offset is the same for all */ 1710 /* adjust timers. this is easy, as the offset is the same for all of them */
543 for (i = 0; i < timercnt; ++i) 1711 for (i = 1; i <= timercnt; ++i)
544 timers [i]->at += diff; 1712 ev_at (timers [i]) += ev_rt_now - mn_now;
545 } 1713 }
546 1714
547 now = ev_now; 1715 mn_now = ev_rt_now;
548 }
549}
550
551int ev_loop_done;
552
553void ev_loop (int flags)
554{
555 double block;
556 ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
557
558 if (checkcnt)
559 { 1716 }
560 queue_events ((W *)checks, checkcnt, EV_CHECK); 1717}
561 call_pending (); 1718
562 } 1719void
1720ev_ref (EV_P)
1721{
1722 ++activecnt;
1723}
1724
1725void
1726ev_unref (EV_P)
1727{
1728 --activecnt;
1729}
1730
1731static int loop_done;
1732
1733void
1734ev_loop (EV_P_ int flags)
1735{
1736 loop_done = EVUNLOOP_CANCEL;
1737
1738 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
563 1739
564 do 1740 do
565 { 1741 {
1742#ifndef _WIN32
1743 if (expect_false (curpid)) /* penalise the forking check even more */
1744 if (expect_false (getpid () != curpid))
1745 {
1746 curpid = getpid ();
1747 postfork = 1;
1748 }
1749#endif
1750
1751#if EV_FORK_ENABLE
1752 /* we might have forked, so queue fork handlers */
1753 if (expect_false (postfork))
1754 if (forkcnt)
1755 {
1756 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1757 call_pending (EV_A);
1758 }
1759#endif
1760
1761 /* queue prepare watchers (and execute them) */
1762 if (expect_false (preparecnt))
1763 {
1764 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1765 call_pending (EV_A);
1766 }
1767
1768 if (expect_false (!activecnt))
1769 break;
1770
1771 /* we might have forked, so reify kernel state if necessary */
1772 if (expect_false (postfork))
1773 loop_fork (EV_A);
1774
566 /* update fd-related kernel structures */ 1775 /* update fd-related kernel structures */
567 fd_reify (); 1776 fd_reify (EV_A);
568 1777
569 /* calculate blocking time */ 1778 /* calculate blocking time */
1779 {
1780 ev_tstamp waittime = 0.;
1781 ev_tstamp sleeptime = 0.;
570 1782
571 /* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */ 1783 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
572 ev_now = ev_time ();
573
574 if (flags & EVLOOP_NONBLOCK || idlecnt)
575 block = 0.;
576 else
577 { 1784 {
1785 /* update time to cancel out callback processing overhead */
1786 time_update (EV_A_ 1e100);
1787
578 block = MAX_BLOCKTIME; 1788 waittime = MAX_BLOCKTIME;
579 1789
580 if (timercnt) 1790 if (timercnt)
581 { 1791 {
582 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 1792 ev_tstamp to = ev_at (timers [HEAP0]) - mn_now + backend_fudge;
583 if (block > to) block = to; 1793 if (waittime > to) waittime = to;
584 } 1794 }
585 1795
1796#if EV_PERIODIC_ENABLE
586 if (periodiccnt) 1797 if (periodiccnt)
587 { 1798 {
588 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1799 ev_tstamp to = ev_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
589 if (block > to) block = to; 1800 if (waittime > to) waittime = to;
590 } 1801 }
1802#endif
591 1803
592 if (block < 0.) block = 0.; 1804 if (expect_false (waittime < timeout_blocktime))
1805 waittime = timeout_blocktime;
1806
1807 sleeptime = waittime - backend_fudge;
1808
1809 if (expect_true (sleeptime > io_blocktime))
1810 sleeptime = io_blocktime;
1811
1812 if (sleeptime)
1813 {
1814 ev_sleep (sleeptime);
1815 waittime -= sleeptime;
1816 }
593 } 1817 }
594 1818
595 method_poll (block); 1819 ++loop_count;
1820 backend_poll (EV_A_ waittime);
596 1821
597 /* update ev_now, do magic */ 1822 /* update ev_rt_now, do magic */
598 time_update (); 1823 time_update (EV_A_ waittime + sleeptime);
1824 }
599 1825
600 /* queue pending timers and reschedule them */ 1826 /* queue pending timers and reschedule them */
1827 timers_reify (EV_A); /* relative timers called last */
1828#if EV_PERIODIC_ENABLE
601 periodics_reify (); /* absolute timers first */ 1829 periodics_reify (EV_A); /* absolute timers called first */
602 timers_reify (); /* relative timers second */ 1830#endif
603 1831
1832#if EV_IDLE_ENABLE
604 /* queue idle watchers unless io or timers are pending */ 1833 /* queue idle watchers unless other events are pending */
605 if (!pendingcnt) 1834 idle_reify (EV_A);
606 queue_events ((W *)idles, idlecnt, EV_IDLE); 1835#endif
607 1836
608 /* queue check and possibly idle watchers */ 1837 /* queue check watchers, to be executed first */
1838 if (expect_false (checkcnt))
609 queue_events ((W *)checks, checkcnt, EV_CHECK); 1839 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
610 1840
611 call_pending (); 1841 call_pending (EV_A);
612 } 1842 }
613 while (!ev_loop_done); 1843 while (expect_true (
1844 activecnt
1845 && !loop_done
1846 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1847 ));
614 1848
615 if (ev_loop_done != 2) 1849 if (loop_done == EVUNLOOP_ONE)
1850 loop_done = EVUNLOOP_CANCEL;
1851}
1852
1853void
1854ev_unloop (EV_P_ int how)
1855{
616 ev_loop_done = 0; 1856 loop_done = how;
617} 1857}
618 1858
619/*****************************************************************************/ 1859/*****************************************************************************/
620 1860
621static void 1861void inline_size
622wlist_add (WL *head, WL elem) 1862wlist_add (WL *head, WL elem)
623{ 1863{
624 elem->next = *head; 1864 elem->next = *head;
625 *head = elem; 1865 *head = elem;
626} 1866}
627 1867
628static void 1868void inline_size
629wlist_del (WL *head, WL elem) 1869wlist_del (WL *head, WL elem)
630{ 1870{
631 while (*head) 1871 while (*head)
632 { 1872 {
633 if (*head == elem) 1873 if (*head == elem)
… …
638 1878
639 head = &(*head)->next; 1879 head = &(*head)->next;
640 } 1880 }
641} 1881}
642 1882
643static void 1883void inline_speed
644ev_clear (W w) 1884clear_pending (EV_P_ W w)
645{ 1885{
646 if (w->pending) 1886 if (w->pending)
647 { 1887 {
648 pendings [w->pending - 1].w = 0; 1888 pendings [ABSPRI (w)][w->pending - 1].w = 0;
649 w->pending = 0; 1889 w->pending = 0;
650 } 1890 }
651} 1891}
652 1892
653static void 1893int
1894ev_clear_pending (EV_P_ void *w)
1895{
1896 W w_ = (W)w;
1897 int pending = w_->pending;
1898
1899 if (expect_true (pending))
1900 {
1901 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1902 w_->pending = 0;
1903 p->w = 0;
1904 return p->events;
1905 }
1906 else
1907 return 0;
1908}
1909
1910void inline_size
1911pri_adjust (EV_P_ W w)
1912{
1913 int pri = w->priority;
1914 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1915 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1916 w->priority = pri;
1917}
1918
1919void inline_speed
654ev_start (W w, int active) 1920ev_start (EV_P_ W w, int active)
655{ 1921{
1922 pri_adjust (EV_A_ w);
656 w->active = active; 1923 w->active = active;
1924 ev_ref (EV_A);
657} 1925}
658 1926
659static void 1927void inline_size
660ev_stop (W w) 1928ev_stop (EV_P_ W w)
661{ 1929{
1930 ev_unref (EV_A);
662 w->active = 0; 1931 w->active = 0;
663} 1932}
664 1933
665/*****************************************************************************/ 1934/*****************************************************************************/
666 1935
667void 1936void noinline
668evio_start (struct ev_io *w) 1937ev_io_start (EV_P_ ev_io *w)
669{ 1938{
1939 int fd = w->fd;
1940
670 if (ev_is_active (w)) 1941 if (expect_false (ev_is_active (w)))
671 return; 1942 return;
672 1943
673 int fd = w->fd; 1944 assert (("ev_io_start called with negative fd", fd >= 0));
674 1945
675 ev_start ((W)w, 1); 1946 ev_start (EV_A_ (W)w, 1);
676 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1947 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
677 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1948 wlist_add (&anfds[fd].head, (WL)w);
678 1949
679 ++fdchangecnt; 1950 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
680 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1951 w->events &= ~EV_IOFDSET;
681 fdchanges [fdchangecnt - 1] = fd;
682} 1952}
683 1953
684void 1954void noinline
685evio_stop (struct ev_io *w) 1955ev_io_stop (EV_P_ ev_io *w)
686{ 1956{
687 ev_clear ((W)w); 1957 clear_pending (EV_A_ (W)w);
688 if (!ev_is_active (w)) 1958 if (expect_false (!ev_is_active (w)))
689 return; 1959 return;
690 1960
1961 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1962
691 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1963 wlist_del (&anfds[w->fd].head, (WL)w);
692 ev_stop ((W)w); 1964 ev_stop (EV_A_ (W)w);
693 1965
694 ++fdchangecnt; 1966 fd_change (EV_A_ w->fd, 1);
695 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
696 fdchanges [fdchangecnt - 1] = w->fd;
697} 1967}
698 1968
699void 1969void noinline
700evtimer_start (struct ev_timer *w) 1970ev_timer_start (EV_P_ ev_timer *w)
701{ 1971{
702 if (ev_is_active (w)) 1972 if (expect_false (ev_is_active (w)))
703 return; 1973 return;
704 1974
705 w->at += now; 1975 ev_at (w) += mn_now;
706 1976
707 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 1977 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
708 1978
709 ev_start ((W)w, ++timercnt); 1979 ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
710 array_needsize (timers, timermax, timercnt, ); 1980 array_needsize (WT, timers, timermax, timercnt + HEAP0, EMPTY2);
711 timers [timercnt - 1] = w; 1981 timers [ev_active (w)] = (WT)w;
712 upheap ((WT *)timers, timercnt - 1); 1982 upheap (timers, ev_active (w));
713}
714 1983
715void 1984 /*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
1985}
1986
1987void noinline
716evtimer_stop (struct ev_timer *w) 1988ev_timer_stop (EV_P_ ev_timer *w)
717{ 1989{
718 ev_clear ((W)w); 1990 clear_pending (EV_A_ (W)w);
719 if (!ev_is_active (w)) 1991 if (expect_false (!ev_is_active (w)))
720 return; 1992 return;
721 1993
722 if (w->active < timercnt--) 1994 {
1995 int active = ev_active (w);
1996
1997 assert (("internal timer heap corruption", timers [active] == (WT)w));
1998
1999 if (expect_true (active < timercnt + HEAP0 - 1))
723 { 2000 {
724 timers [w->active - 1] = timers [timercnt]; 2001 timers [active] = timers [timercnt + HEAP0 - 1];
725 downheap ((WT *)timers, timercnt, w->active - 1); 2002 adjustheap (timers, timercnt, active);
726 } 2003 }
727 2004
728 w->at = w->repeat; 2005 --timercnt;
2006 }
729 2007
2008 ev_at (w) -= mn_now;
2009
730 ev_stop ((W)w); 2010 ev_stop (EV_A_ (W)w);
731} 2011}
732 2012
733void 2013void noinline
734evtimer_again (struct ev_timer *w) 2014ev_timer_again (EV_P_ ev_timer *w)
735{ 2015{
736 if (ev_is_active (w)) 2016 if (ev_is_active (w))
737 { 2017 {
738 if (w->repeat) 2018 if (w->repeat)
739 { 2019 {
740 w->at = now + w->repeat; 2020 ev_at (w) = mn_now + w->repeat;
741 downheap ((WT *)timers, timercnt, w->active - 1); 2021 adjustheap (timers, timercnt, ev_active (w));
742 } 2022 }
743 else 2023 else
744 evtimer_stop (w); 2024 ev_timer_stop (EV_A_ w);
745 } 2025 }
746 else if (w->repeat) 2026 else if (w->repeat)
2027 {
2028 ev_at (w) = w->repeat;
747 evtimer_start (w); 2029 ev_timer_start (EV_A_ w);
2030 }
748} 2031}
749 2032
750void 2033#if EV_PERIODIC_ENABLE
2034void noinline
751evperiodic_start (struct ev_periodic *w) 2035ev_periodic_start (EV_P_ ev_periodic *w)
752{ 2036{
753 if (ev_is_active (w)) 2037 if (expect_false (ev_is_active (w)))
754 return; 2038 return;
755 2039
756 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 2040 if (w->reschedule_cb)
757 2041 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2042 else if (w->interval)
2043 {
2044 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
758 /* this formula differs from the one in periodic_reify because we do not always round up */ 2045 /* this formula differs from the one in periodic_reify because we do not always round up */
759 if (w->interval)
760 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 2046 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2047 }
2048 else
2049 ev_at (w) = w->offset;
761 2050
762 ev_start ((W)w, ++periodiccnt); 2051 ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
763 array_needsize (periodics, periodicmax, periodiccnt, ); 2052 array_needsize (WT, periodics, periodicmax, periodiccnt + HEAP0, EMPTY2);
764 periodics [periodiccnt - 1] = w; 2053 periodics [ev_active (w)] = (WT)w;
765 upheap ((WT *)periodics, periodiccnt - 1); 2054 upheap (periodics, ev_active (w));
766}
767 2055
768void 2056 /*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
2057}
2058
2059void noinline
769evperiodic_stop (struct ev_periodic *w) 2060ev_periodic_stop (EV_P_ ev_periodic *w)
770{ 2061{
771 ev_clear ((W)w); 2062 clear_pending (EV_A_ (W)w);
772 if (!ev_is_active (w)) 2063 if (expect_false (!ev_is_active (w)))
773 return; 2064 return;
774 2065
775 if (w->active < periodiccnt--) 2066 {
2067 int active = ev_active (w);
2068
2069 assert (("internal periodic heap corruption", periodics [active] == (WT)w));
2070
2071 if (expect_true (active < periodiccnt + HEAP0 - 1))
776 { 2072 {
777 periodics [w->active - 1] = periodics [periodiccnt]; 2073 periodics [active] = periodics [periodiccnt + HEAP0 - 1];
778 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2074 adjustheap (periodics, periodiccnt, active);
779 } 2075 }
780 2076
2077 --periodiccnt;
2078 }
2079
781 ev_stop ((W)w); 2080 ev_stop (EV_A_ (W)w);
782} 2081}
783 2082
784void 2083void noinline
2084ev_periodic_again (EV_P_ ev_periodic *w)
2085{
2086 /* TODO: use adjustheap and recalculation */
2087 ev_periodic_stop (EV_A_ w);
2088 ev_periodic_start (EV_A_ w);
2089}
2090#endif
2091
2092#ifndef SA_RESTART
2093# define SA_RESTART 0
2094#endif
2095
2096void noinline
785evsignal_start (struct ev_signal *w) 2097ev_signal_start (EV_P_ ev_signal *w)
786{ 2098{
2099#if EV_MULTIPLICITY
2100 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2101#endif
787 if (ev_is_active (w)) 2102 if (expect_false (ev_is_active (w)))
788 return; 2103 return;
789 2104
790 ev_start ((W)w, 1); 2105 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2106
2107 evpipe_init (EV_A);
2108
2109 {
2110#ifndef _WIN32
2111 sigset_t full, prev;
2112 sigfillset (&full);
2113 sigprocmask (SIG_SETMASK, &full, &prev);
2114#endif
2115
791 array_needsize (signals, signalmax, w->signum, signals_init); 2116 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2117
2118#ifndef _WIN32
2119 sigprocmask (SIG_SETMASK, &prev, 0);
2120#endif
2121 }
2122
2123 ev_start (EV_A_ (W)w, 1);
792 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2124 wlist_add (&signals [w->signum - 1].head, (WL)w);
793 2125
794 if (!w->next) 2126 if (!((WL)w)->next)
795 { 2127 {
2128#if _WIN32
2129 signal (w->signum, ev_sighandler);
2130#else
796 struct sigaction sa; 2131 struct sigaction sa;
797 sa.sa_handler = sighandler; 2132 sa.sa_handler = ev_sighandler;
798 sigfillset (&sa.sa_mask); 2133 sigfillset (&sa.sa_mask);
799 sa.sa_flags = 0; 2134 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
800 sigaction (w->signum, &sa, 0); 2135 sigaction (w->signum, &sa, 0);
2136#endif
801 } 2137 }
802} 2138}
803 2139
804void 2140void noinline
805evsignal_stop (struct ev_signal *w) 2141ev_signal_stop (EV_P_ ev_signal *w)
806{ 2142{
807 ev_clear ((W)w); 2143 clear_pending (EV_A_ (W)w);
808 if (!ev_is_active (w)) 2144 if (expect_false (!ev_is_active (w)))
809 return; 2145 return;
810 2146
811 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2147 wlist_del (&signals [w->signum - 1].head, (WL)w);
812 ev_stop ((W)w); 2148 ev_stop (EV_A_ (W)w);
813 2149
814 if (!signals [w->signum - 1].head) 2150 if (!signals [w->signum - 1].head)
815 signal (w->signum, SIG_DFL); 2151 signal (w->signum, SIG_DFL);
816} 2152}
817 2153
818void evidle_start (struct ev_idle *w) 2154void
2155ev_child_start (EV_P_ ev_child *w)
819{ 2156{
2157#if EV_MULTIPLICITY
2158 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2159#endif
820 if (ev_is_active (w)) 2160 if (expect_false (ev_is_active (w)))
821 return; 2161 return;
822 2162
823 ev_start ((W)w, ++idlecnt); 2163 ev_start (EV_A_ (W)w, 1);
824 array_needsize (idles, idlemax, idlecnt, ); 2164 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
825 idles [idlecnt - 1] = w;
826} 2165}
827 2166
828void evidle_stop (struct ev_idle *w) 2167void
2168ev_child_stop (EV_P_ ev_child *w)
829{ 2169{
830 ev_clear ((W)w); 2170 clear_pending (EV_A_ (W)w);
831 if (ev_is_active (w)) 2171 if (expect_false (!ev_is_active (w)))
832 return; 2172 return;
833 2173
834 idles [w->active - 1] = idles [--idlecnt]; 2174 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
835 ev_stop ((W)w); 2175 ev_stop (EV_A_ (W)w);
836} 2176}
837 2177
838void evcheck_start (struct ev_check *w) 2178#if EV_STAT_ENABLE
2179
2180# ifdef _WIN32
2181# undef lstat
2182# define lstat(a,b) _stati64 (a,b)
2183# endif
2184
2185#define DEF_STAT_INTERVAL 5.0074891
2186#define MIN_STAT_INTERVAL 0.1074891
2187
2188static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2189
2190#if EV_USE_INOTIFY
2191# define EV_INOTIFY_BUFSIZE 8192
2192
2193static void noinline
2194infy_add (EV_P_ ev_stat *w)
839{ 2195{
840 if (ev_is_active (w)) 2196 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);
2197
2198 if (w->wd < 0)
2199 {
2200 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2201
2202 /* monitor some parent directory for speedup hints */
2203 /* note that exceeding the hardcoded limit is not a correctness issue, */
2204 /* but an efficiency issue only */
2205 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2206 {
2207 char path [4096];
2208 strcpy (path, w->path);
2209
2210 do
2211 {
2212 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2213 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2214
2215 char *pend = strrchr (path, '/');
2216
2217 if (!pend)
2218 break; /* whoops, no '/', complain to your admin */
2219
2220 *pend = 0;
2221 w->wd = inotify_add_watch (fs_fd, path, mask);
2222 }
2223 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2224 }
2225 }
2226 else
2227 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2228
2229 if (w->wd >= 0)
2230 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2231}
2232
2233static void noinline
2234infy_del (EV_P_ ev_stat *w)
2235{
2236 int slot;
2237 int wd = w->wd;
2238
2239 if (wd < 0)
841 return; 2240 return;
842 2241
2242 w->wd = -2;
2243 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2244 wlist_del (&fs_hash [slot].head, (WL)w);
2245
2246 /* remove this watcher, if others are watching it, they will rearm */
2247 inotify_rm_watch (fs_fd, wd);
2248}
2249
2250static void noinline
2251infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2252{
2253 if (slot < 0)
2254 /* overflow, need to check for all hahs slots */
2255 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2256 infy_wd (EV_A_ slot, wd, ev);
2257 else
2258 {
2259 WL w_;
2260
2261 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2262 {
2263 ev_stat *w = (ev_stat *)w_;
2264 w_ = w_->next; /* lets us remove this watcher and all before it */
2265
2266 if (w->wd == wd || wd == -1)
2267 {
2268 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2269 {
2270 w->wd = -1;
2271 infy_add (EV_A_ w); /* re-add, no matter what */
2272 }
2273
2274 stat_timer_cb (EV_A_ &w->timer, 0);
2275 }
2276 }
2277 }
2278}
2279
2280static void
2281infy_cb (EV_P_ ev_io *w, int revents)
2282{
2283 char buf [EV_INOTIFY_BUFSIZE];
2284 struct inotify_event *ev = (struct inotify_event *)buf;
2285 int ofs;
2286 int len = read (fs_fd, buf, sizeof (buf));
2287
2288 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2289 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2290}
2291
2292void inline_size
2293infy_init (EV_P)
2294{
2295 if (fs_fd != -2)
2296 return;
2297
2298 fs_fd = inotify_init ();
2299
2300 if (fs_fd >= 0)
2301 {
2302 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2303 ev_set_priority (&fs_w, EV_MAXPRI);
2304 ev_io_start (EV_A_ &fs_w);
2305 }
2306}
2307
2308void inline_size
2309infy_fork (EV_P)
2310{
2311 int slot;
2312
2313 if (fs_fd < 0)
2314 return;
2315
2316 close (fs_fd);
2317 fs_fd = inotify_init ();
2318
2319 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2320 {
2321 WL w_ = fs_hash [slot].head;
2322 fs_hash [slot].head = 0;
2323
2324 while (w_)
2325 {
2326 ev_stat *w = (ev_stat *)w_;
2327 w_ = w_->next; /* lets us add this watcher */
2328
2329 w->wd = -1;
2330
2331 if (fs_fd >= 0)
2332 infy_add (EV_A_ w); /* re-add, no matter what */
2333 else
2334 ev_timer_start (EV_A_ &w->timer);
2335 }
2336
2337 }
2338}
2339
2340#endif
2341
2342void
2343ev_stat_stat (EV_P_ ev_stat *w)
2344{
2345 if (lstat (w->path, &w->attr) < 0)
2346 w->attr.st_nlink = 0;
2347 else if (!w->attr.st_nlink)
2348 w->attr.st_nlink = 1;
2349}
2350
2351static void noinline
2352stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2353{
2354 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2355
2356 /* we copy this here each the time so that */
2357 /* prev has the old value when the callback gets invoked */
2358 w->prev = w->attr;
2359 ev_stat_stat (EV_A_ w);
2360
2361 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2362 if (
2363 w->prev.st_dev != w->attr.st_dev
2364 || w->prev.st_ino != w->attr.st_ino
2365 || w->prev.st_mode != w->attr.st_mode
2366 || w->prev.st_nlink != w->attr.st_nlink
2367 || w->prev.st_uid != w->attr.st_uid
2368 || w->prev.st_gid != w->attr.st_gid
2369 || w->prev.st_rdev != w->attr.st_rdev
2370 || w->prev.st_size != w->attr.st_size
2371 || w->prev.st_atime != w->attr.st_atime
2372 || w->prev.st_mtime != w->attr.st_mtime
2373 || w->prev.st_ctime != w->attr.st_ctime
2374 ) {
2375 #if EV_USE_INOTIFY
2376 infy_del (EV_A_ w);
2377 infy_add (EV_A_ w);
2378 ev_stat_stat (EV_A_ w); /* avoid race... */
2379 #endif
2380
2381 ev_feed_event (EV_A_ w, EV_STAT);
2382 }
2383}
2384
2385void
2386ev_stat_start (EV_P_ ev_stat *w)
2387{
2388 if (expect_false (ev_is_active (w)))
2389 return;
2390
2391 /* since we use memcmp, we need to clear any padding data etc. */
2392 memset (&w->prev, 0, sizeof (ev_statdata));
2393 memset (&w->attr, 0, sizeof (ev_statdata));
2394
2395 ev_stat_stat (EV_A_ w);
2396
2397 if (w->interval < MIN_STAT_INTERVAL)
2398 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2399
2400 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2401 ev_set_priority (&w->timer, ev_priority (w));
2402
2403#if EV_USE_INOTIFY
2404 infy_init (EV_A);
2405
2406 if (fs_fd >= 0)
2407 infy_add (EV_A_ w);
2408 else
2409#endif
2410 ev_timer_start (EV_A_ &w->timer);
2411
2412 ev_start (EV_A_ (W)w, 1);
2413}
2414
2415void
2416ev_stat_stop (EV_P_ ev_stat *w)
2417{
2418 clear_pending (EV_A_ (W)w);
2419 if (expect_false (!ev_is_active (w)))
2420 return;
2421
2422#if EV_USE_INOTIFY
2423 infy_del (EV_A_ w);
2424#endif
2425 ev_timer_stop (EV_A_ &w->timer);
2426
2427 ev_stop (EV_A_ (W)w);
2428}
2429#endif
2430
2431#if EV_IDLE_ENABLE
2432void
2433ev_idle_start (EV_P_ ev_idle *w)
2434{
2435 if (expect_false (ev_is_active (w)))
2436 return;
2437
2438 pri_adjust (EV_A_ (W)w);
2439
2440 {
2441 int active = ++idlecnt [ABSPRI (w)];
2442
2443 ++idleall;
2444 ev_start (EV_A_ (W)w, active);
2445
2446 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2447 idles [ABSPRI (w)][active - 1] = w;
2448 }
2449}
2450
2451void
2452ev_idle_stop (EV_P_ ev_idle *w)
2453{
2454 clear_pending (EV_A_ (W)w);
2455 if (expect_false (!ev_is_active (w)))
2456 return;
2457
2458 {
2459 int active = ev_active (w);
2460
2461 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2462 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2463
2464 ev_stop (EV_A_ (W)w);
2465 --idleall;
2466 }
2467}
2468#endif
2469
2470void
2471ev_prepare_start (EV_P_ ev_prepare *w)
2472{
2473 if (expect_false (ev_is_active (w)))
2474 return;
2475
2476 ev_start (EV_A_ (W)w, ++preparecnt);
2477 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2478 prepares [preparecnt - 1] = w;
2479}
2480
2481void
2482ev_prepare_stop (EV_P_ ev_prepare *w)
2483{
2484 clear_pending (EV_A_ (W)w);
2485 if (expect_false (!ev_is_active (w)))
2486 return;
2487
2488 {
2489 int active = ev_active (w);
2490
2491 prepares [active - 1] = prepares [--preparecnt];
2492 ev_active (prepares [active - 1]) = active;
2493 }
2494
2495 ev_stop (EV_A_ (W)w);
2496}
2497
2498void
2499ev_check_start (EV_P_ ev_check *w)
2500{
2501 if (expect_false (ev_is_active (w)))
2502 return;
2503
843 ev_start ((W)w, ++checkcnt); 2504 ev_start (EV_A_ (W)w, ++checkcnt);
844 array_needsize (checks, checkmax, checkcnt, ); 2505 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
845 checks [checkcnt - 1] = w; 2506 checks [checkcnt - 1] = w;
846} 2507}
847 2508
2509void
848void evcheck_stop (struct ev_check *w) 2510ev_check_stop (EV_P_ ev_check *w)
849{ 2511{
850 ev_clear ((W)w); 2512 clear_pending (EV_A_ (W)w);
851 if (ev_is_active (w)) 2513 if (expect_false (!ev_is_active (w)))
852 return; 2514 return;
853 2515
2516 {
2517 int active = ev_active (w);
2518
854 checks [w->active - 1] = checks [--checkcnt]; 2519 checks [active - 1] = checks [--checkcnt];
2520 ev_active (checks [active - 1]) = active;
2521 }
2522
855 ev_stop ((W)w); 2523 ev_stop (EV_A_ (W)w);
856} 2524}
2525
2526#if EV_EMBED_ENABLE
2527void noinline
2528ev_embed_sweep (EV_P_ ev_embed *w)
2529{
2530 ev_loop (w->other, EVLOOP_NONBLOCK);
2531}
2532
2533static void
2534embed_io_cb (EV_P_ ev_io *io, int revents)
2535{
2536 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2537
2538 if (ev_cb (w))
2539 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2540 else
2541 ev_loop (w->other, EVLOOP_NONBLOCK);
2542}
2543
2544static void
2545embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2546{
2547 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2548
2549 {
2550 struct ev_loop *loop = w->other;
2551
2552 while (fdchangecnt)
2553 {
2554 fd_reify (EV_A);
2555 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2556 }
2557 }
2558}
2559
2560#if 0
2561static void
2562embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2563{
2564 ev_idle_stop (EV_A_ idle);
2565}
2566#endif
2567
2568void
2569ev_embed_start (EV_P_ ev_embed *w)
2570{
2571 if (expect_false (ev_is_active (w)))
2572 return;
2573
2574 {
2575 struct ev_loop *loop = w->other;
2576 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2577 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2578 }
2579
2580 ev_set_priority (&w->io, ev_priority (w));
2581 ev_io_start (EV_A_ &w->io);
2582
2583 ev_prepare_init (&w->prepare, embed_prepare_cb);
2584 ev_set_priority (&w->prepare, EV_MINPRI);
2585 ev_prepare_start (EV_A_ &w->prepare);
2586
2587 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2588
2589 ev_start (EV_A_ (W)w, 1);
2590}
2591
2592void
2593ev_embed_stop (EV_P_ ev_embed *w)
2594{
2595 clear_pending (EV_A_ (W)w);
2596 if (expect_false (!ev_is_active (w)))
2597 return;
2598
2599 ev_io_stop (EV_A_ &w->io);
2600 ev_prepare_stop (EV_A_ &w->prepare);
2601
2602 ev_stop (EV_A_ (W)w);
2603}
2604#endif
2605
2606#if EV_FORK_ENABLE
2607void
2608ev_fork_start (EV_P_ ev_fork *w)
2609{
2610 if (expect_false (ev_is_active (w)))
2611 return;
2612
2613 ev_start (EV_A_ (W)w, ++forkcnt);
2614 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2615 forks [forkcnt - 1] = w;
2616}
2617
2618void
2619ev_fork_stop (EV_P_ ev_fork *w)
2620{
2621 clear_pending (EV_A_ (W)w);
2622 if (expect_false (!ev_is_active (w)))
2623 return;
2624
2625 {
2626 int active = ev_active (w);
2627
2628 forks [active - 1] = forks [--forkcnt];
2629 ev_active (forks [active - 1]) = active;
2630 }
2631
2632 ev_stop (EV_A_ (W)w);
2633}
2634#endif
2635
2636#if EV_ASYNC_ENABLE
2637void
2638ev_async_start (EV_P_ ev_async *w)
2639{
2640 if (expect_false (ev_is_active (w)))
2641 return;
2642
2643 evpipe_init (EV_A);
2644
2645 ev_start (EV_A_ (W)w, ++asynccnt);
2646 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2647 asyncs [asynccnt - 1] = w;
2648}
2649
2650void
2651ev_async_stop (EV_P_ ev_async *w)
2652{
2653 clear_pending (EV_A_ (W)w);
2654 if (expect_false (!ev_is_active (w)))
2655 return;
2656
2657 {
2658 int active = ev_active (w);
2659
2660 asyncs [active - 1] = asyncs [--asynccnt];
2661 ev_active (asyncs [active - 1]) = active;
2662 }
2663
2664 ev_stop (EV_A_ (W)w);
2665}
2666
2667void
2668ev_async_send (EV_P_ ev_async *w)
2669{
2670 w->sent = 1;
2671 evpipe_write (EV_A_ &gotasync);
2672}
2673#endif
857 2674
858/*****************************************************************************/ 2675/*****************************************************************************/
859 2676
860struct ev_once 2677struct ev_once
861{ 2678{
862 struct ev_io io; 2679 ev_io io;
863 struct ev_timer to; 2680 ev_timer to;
864 void (*cb)(int revents, void *arg); 2681 void (*cb)(int revents, void *arg);
865 void *arg; 2682 void *arg;
866}; 2683};
867 2684
868static void 2685static void
869once_cb (struct ev_once *once, int revents) 2686once_cb (EV_P_ struct ev_once *once, int revents)
870{ 2687{
871 void (*cb)(int revents, void *arg) = once->cb; 2688 void (*cb)(int revents, void *arg) = once->cb;
872 void *arg = once->arg; 2689 void *arg = once->arg;
873 2690
874 evio_stop (&once->io); 2691 ev_io_stop (EV_A_ &once->io);
875 evtimer_stop (&once->to); 2692 ev_timer_stop (EV_A_ &once->to);
876 free (once); 2693 ev_free (once);
877 2694
878 cb (revents, arg); 2695 cb (revents, arg);
879} 2696}
880 2697
881static void 2698static void
882once_cb_io (struct ev_io *w, int revents) 2699once_cb_io (EV_P_ ev_io *w, int revents)
883{ 2700{
884 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2701 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
885} 2702}
886 2703
887static void 2704static void
888once_cb_to (struct ev_timer *w, int revents) 2705once_cb_to (EV_P_ ev_timer *w, int revents)
889{ 2706{
890 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2707 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
891} 2708}
892 2709
893void 2710void
894ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2711ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
895{ 2712{
896 struct ev_once *once = malloc (sizeof (struct ev_once)); 2713 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
897 2714
898 if (!once) 2715 if (expect_false (!once))
899 cb (EV_ERROR, arg); 2716 {
900 else 2717 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
2718 return;
901 { 2719 }
2720
902 once->cb = cb; 2721 once->cb = cb;
903 once->arg = arg; 2722 once->arg = arg;
904 2723
905 evw_init (&once->io, once_cb_io); 2724 ev_init (&once->io, once_cb_io);
906
907 if (fd >= 0) 2725 if (fd >= 0)
908 { 2726 {
909 evio_set (&once->io, fd, events); 2727 ev_io_set (&once->io, fd, events);
910 evio_start (&once->io); 2728 ev_io_start (EV_A_ &once->io);
911 } 2729 }
912 2730
913 evw_init (&once->to, once_cb_to); 2731 ev_init (&once->to, once_cb_to);
914
915 if (timeout >= 0.) 2732 if (timeout >= 0.)
916 { 2733 {
917 evtimer_set (&once->to, timeout, 0.); 2734 ev_timer_set (&once->to, timeout, 0.);
918 evtimer_start (&once->to); 2735 ev_timer_start (EV_A_ &once->to);
919 }
920 }
921}
922
923/*****************************************************************************/
924
925#if 0
926
927struct ev_io wio;
928
929static void
930sin_cb (struct ev_io *w, int revents)
931{
932 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
933}
934
935static void
936ocb (struct ev_timer *w, int revents)
937{
938 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
939 evtimer_stop (w);
940 evtimer_start (w);
941}
942
943static void
944scb (struct ev_signal *w, int revents)
945{
946 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
947 evio_stop (&wio);
948 evio_start (&wio);
949}
950
951static void
952gcb (struct ev_signal *w, int revents)
953{
954 fprintf (stderr, "generic %x\n", revents);
955
956}
957
958int main (void)
959{
960 ev_init (0);
961
962 evio_init (&wio, sin_cb, 0, EV_READ);
963 evio_start (&wio);
964
965 struct ev_timer t[10000];
966
967#if 0
968 int i;
969 for (i = 0; i < 10000; ++i)
970 { 2736 }
971 struct ev_timer *w = t + i;
972 evw_init (w, ocb, i);
973 evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
974 evtimer_start (w);
975 if (drand48 () < 0.5)
976 evtimer_stop (w);
977 }
978#endif
979
980 struct ev_timer t1;
981 evtimer_init (&t1, ocb, 5, 10);
982 evtimer_start (&t1);
983
984 struct ev_signal sig;
985 evsignal_init (&sig, scb, SIGQUIT);
986 evsignal_start (&sig);
987
988 struct ev_check cw;
989 evcheck_init (&cw, gcb);
990 evcheck_start (&cw);
991
992 struct ev_idle iw;
993 evidle_init (&iw, gcb);
994 evidle_start (&iw);
995
996 ev_loop (0);
997
998 return 0;
999} 2737}
1000 2738
2739#if EV_MULTIPLICITY
2740 #include "ev_wrap.h"
1001#endif 2741#endif
1002 2742
2743#ifdef __cplusplus
2744}
2745#endif
1003 2746
1004
1005

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