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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 1.220 by root, Sun Apr 6 09:53:17 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 */
273int eventfd (unsigned int initval, int flags);
274#endif
275
276/**/
277
278/*
279 * This is used to avoid floating point rounding problems.
280 * It is added to ev_rt_now when scheduling periodics
281 * to ensure progress, time-wise, even when rounding
282 * errors are against us.
283 * This value is good at least till the year 4000.
284 * Better solutions welcome.
285 */
286#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
61 287
62#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 288#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
63#define MAX_BLOCKTIME 60. 289#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
290/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
64 291
65#include "ev.h" 292#if __GNUC__ >= 4
293# define expect(expr,value) __builtin_expect ((expr),(value))
294# define noinline __attribute__ ((noinline))
295#else
296# define expect(expr,value) (expr)
297# define noinline
298# if __STDC_VERSION__ < 199901L
299# define inline
300# endif
301#endif
66 302
303#define expect_false(expr) expect ((expr) != 0, 0)
304#define expect_true(expr) expect ((expr) != 0, 1)
305#define inline_size static inline
306
307#if EV_MINIMAL
308# define inline_speed static noinline
309#else
310# define inline_speed static inline
311#endif
312
313#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
314#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
315
316#define EMPTY /* required for microsofts broken pseudo-c compiler */
317#define EMPTY2(a,b) /* used to suppress some warnings */
318
67typedef struct ev_watcher *W; 319typedef ev_watcher *W;
68typedef struct ev_watcher_list *WL; 320typedef ev_watcher_list *WL;
69typedef struct ev_watcher_time *WT; 321typedef ev_watcher_time *WT;
70 322
71static ev_tstamp now, diff; /* monotonic clock */ 323#if EV_USE_MONOTONIC
324/* sig_atomic_t is used to avoid per-thread variables or locking but still */
325/* giving it a reasonably high chance of working on typical architetcures */
326static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
327#endif
328
329#ifdef _WIN32
330# include "ev_win32.c"
331#endif
332
333/*****************************************************************************/
334
335static void (*syserr_cb)(const char *msg);
336
337void
338ev_set_syserr_cb (void (*cb)(const char *msg))
339{
340 syserr_cb = cb;
341}
342
343static void noinline
344syserr (const char *msg)
345{
346 if (!msg)
347 msg = "(libev) system error";
348
349 if (syserr_cb)
350 syserr_cb (msg);
351 else
352 {
353 perror (msg);
354 abort ();
355 }
356}
357
358static void *(*alloc)(void *ptr, long size);
359
360void
361ev_set_allocator (void *(*cb)(void *ptr, long size))
362{
363 alloc = cb;
364}
365
366inline_speed void *
367ev_realloc (void *ptr, long size)
368{
369 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
370
371 if (!ptr && size)
372 {
373 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
374 abort ();
375 }
376
377 return ptr;
378}
379
380#define ev_malloc(size) ev_realloc (0, (size))
381#define ev_free(ptr) ev_realloc ((ptr), 0)
382
383/*****************************************************************************/
384
385typedef struct
386{
387 WL head;
388 unsigned char events;
389 unsigned char reify;
390#if EV_SELECT_IS_WINSOCKET
391 SOCKET handle;
392#endif
393} ANFD;
394
395typedef struct
396{
397 W w;
398 int events;
399} ANPENDING;
400
401#if EV_USE_INOTIFY
402typedef struct
403{
404 WL head;
405} ANFS;
406#endif
407
408#if EV_MULTIPLICITY
409
410 struct ev_loop
411 {
412 ev_tstamp ev_rt_now;
413 #define ev_rt_now ((loop)->ev_rt_now)
414 #define VAR(name,decl) decl;
415 #include "ev_vars.h"
416 #undef VAR
417 };
418 #include "ev_wrap.h"
419
420 static struct ev_loop default_loop_struct;
421 struct ev_loop *ev_default_loop_ptr;
422
423#else
424
72ev_tstamp ev_now; 425 ev_tstamp ev_rt_now;
73int ev_method; 426 #define VAR(name,decl) static decl;
427 #include "ev_vars.h"
428 #undef VAR
74 429
75static int have_monotonic; /* runtime */ 430 static int ev_default_loop_ptr;
76 431
77static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 432#endif
78static void (*method_modify)(int fd, int oev, int nev);
79static void (*method_poll)(ev_tstamp timeout);
80 433
81/*****************************************************************************/ 434/*****************************************************************************/
82 435
83ev_tstamp 436ev_tstamp
84ev_time (void) 437ev_time (void)
85{ 438{
86#if HAVE_REALTIME 439#if EV_USE_REALTIME
87 struct timespec ts; 440 struct timespec ts;
88 clock_gettime (CLOCK_REALTIME, &ts); 441 clock_gettime (CLOCK_REALTIME, &ts);
89 return ts.tv_sec + ts.tv_nsec * 1e-9; 442 return ts.tv_sec + ts.tv_nsec * 1e-9;
90#else 443#else
91 struct timeval tv; 444 struct timeval tv;
92 gettimeofday (&tv, 0); 445 gettimeofday (&tv, 0);
93 return tv.tv_sec + tv.tv_usec * 1e-6; 446 return tv.tv_sec + tv.tv_usec * 1e-6;
94#endif 447#endif
95} 448}
96 449
97static ev_tstamp 450ev_tstamp inline_size
98get_clock (void) 451get_clock (void)
99{ 452{
100#if HAVE_MONOTONIC 453#if EV_USE_MONOTONIC
101 if (have_monotonic) 454 if (expect_true (have_monotonic))
102 { 455 {
103 struct timespec ts; 456 struct timespec ts;
104 clock_gettime (CLOCK_MONOTONIC, &ts); 457 clock_gettime (CLOCK_MONOTONIC, &ts);
105 return ts.tv_sec + ts.tv_nsec * 1e-9; 458 return ts.tv_sec + ts.tv_nsec * 1e-9;
106 } 459 }
107#endif 460#endif
108 461
109 return ev_time (); 462 return ev_time ();
110} 463}
111 464
112#define array_needsize(base,cur,cnt,init) \ 465#if EV_MULTIPLICITY
113 if ((cnt) > cur) \ 466ev_tstamp
114 { \ 467ev_now (EV_P)
115 int newcnt = cur ? cur << 1 : 16; \ 468{
116 base = realloc (base, sizeof (*base) * (newcnt)); \ 469 return ev_rt_now;
117 init (base + cur, newcnt - cur); \ 470}
118 cur = newcnt; \ 471#endif
472
473void
474ev_sleep (ev_tstamp delay)
475{
476 if (delay > 0.)
119 } 477 {
478#if EV_USE_NANOSLEEP
479 struct timespec ts;
480
481 ts.tv_sec = (time_t)delay;
482 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
483
484 nanosleep (&ts, 0);
485#elif defined(_WIN32)
486 Sleep ((unsigned long)(delay * 1e3));
487#else
488 struct timeval tv;
489
490 tv.tv_sec = (time_t)delay;
491 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
492
493 select (0, 0, 0, 0, &tv);
494#endif
495 }
496}
120 497
121/*****************************************************************************/ 498/*****************************************************************************/
122 499
500int inline_size
501array_nextsize (int elem, int cur, int cnt)
502{
503 int ncur = cur + 1;
504
505 do
506 ncur <<= 1;
507 while (cnt > ncur);
508
509 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
510 if (elem * ncur > 4096)
511 {
512 ncur *= elem;
513 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
514 ncur = ncur - sizeof (void *) * 4;
515 ncur /= elem;
516 }
517
518 return ncur;
519}
520
521static noinline void *
522array_realloc (int elem, void *base, int *cur, int cnt)
523{
524 *cur = array_nextsize (elem, *cur, cnt);
525 return ev_realloc (base, elem * *cur);
526}
527
528#define array_needsize(type,base,cur,cnt,init) \
529 if (expect_false ((cnt) > (cur))) \
530 { \
531 int ocur_ = (cur); \
532 (base) = (type *)array_realloc \
533 (sizeof (type), (base), &(cur), (cnt)); \
534 init ((base) + (ocur_), (cur) - ocur_); \
535 }
536
537#if 0
538#define array_slim(type,stem) \
539 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
540 { \
541 stem ## max = array_roundsize (stem ## cnt >> 1); \
542 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
543 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
544 }
545#endif
546
547#define array_free(stem, idx) \
548 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
549
550/*****************************************************************************/
551
552void noinline
553ev_feed_event (EV_P_ void *w, int revents)
554{
555 W w_ = (W)w;
556 int pri = ABSPRI (w_);
557
558 if (expect_false (w_->pending))
559 pendings [pri][w_->pending - 1].events |= revents;
560 else
561 {
562 w_->pending = ++pendingcnt [pri];
563 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
564 pendings [pri][w_->pending - 1].w = w_;
565 pendings [pri][w_->pending - 1].events = revents;
566 }
567}
568
569void inline_speed
570queue_events (EV_P_ W *events, int eventcnt, int type)
571{
572 int i;
573
574 for (i = 0; i < eventcnt; ++i)
575 ev_feed_event (EV_A_ events [i], type);
576}
577
578/*****************************************************************************/
579
580void inline_size
581anfds_init (ANFD *base, int count)
582{
583 while (count--)
584 {
585 base->head = 0;
586 base->events = EV_NONE;
587 base->reify = 0;
588
589 ++base;
590 }
591}
592
593void inline_speed
594fd_event (EV_P_ int fd, int revents)
595{
596 ANFD *anfd = anfds + fd;
597 ev_io *w;
598
599 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
600 {
601 int ev = w->events & revents;
602
603 if (ev)
604 ev_feed_event (EV_A_ (W)w, ev);
605 }
606}
607
608void
609ev_feed_fd_event (EV_P_ int fd, int revents)
610{
611 if (fd >= 0 && fd < anfdmax)
612 fd_event (EV_A_ fd, revents);
613}
614
615void inline_size
616fd_reify (EV_P)
617{
618 int i;
619
620 for (i = 0; i < fdchangecnt; ++i)
621 {
622 int fd = fdchanges [i];
623 ANFD *anfd = anfds + fd;
624 ev_io *w;
625
626 unsigned char events = 0;
627
628 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
629 events |= (unsigned char)w->events;
630
631#if EV_SELECT_IS_WINSOCKET
632 if (events)
633 {
634 unsigned long argp;
635 #ifdef EV_FD_TO_WIN32_HANDLE
636 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
637 #else
638 anfd->handle = _get_osfhandle (fd);
639 #endif
640 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
641 }
642#endif
643
644 {
645 unsigned char o_events = anfd->events;
646 unsigned char o_reify = anfd->reify;
647
648 anfd->reify = 0;
649 anfd->events = events;
650
651 if (o_events != events || o_reify & EV_IOFDSET)
652 backend_modify (EV_A_ fd, o_events, events);
653 }
654 }
655
656 fdchangecnt = 0;
657}
658
659void inline_size
660fd_change (EV_P_ int fd, int flags)
661{
662 unsigned char reify = anfds [fd].reify;
663 anfds [fd].reify |= flags;
664
665 if (expect_true (!reify))
666 {
667 ++fdchangecnt;
668 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
669 fdchanges [fdchangecnt - 1] = fd;
670 }
671}
672
673void inline_speed
674fd_kill (EV_P_ int fd)
675{
676 ev_io *w;
677
678 while ((w = (ev_io *)anfds [fd].head))
679 {
680 ev_io_stop (EV_A_ w);
681 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
682 }
683}
684
685int inline_size
686fd_valid (int fd)
687{
688#ifdef _WIN32
689 return _get_osfhandle (fd) != -1;
690#else
691 return fcntl (fd, F_GETFD) != -1;
692#endif
693}
694
695/* called on EBADF to verify fds */
696static void noinline
697fd_ebadf (EV_P)
698{
699 int fd;
700
701 for (fd = 0; fd < anfdmax; ++fd)
702 if (anfds [fd].events)
703 if (!fd_valid (fd) == -1 && errno == EBADF)
704 fd_kill (EV_A_ fd);
705}
706
707/* called on ENOMEM in select/poll to kill some fds and retry */
708static void noinline
709fd_enomem (EV_P)
710{
711 int fd;
712
713 for (fd = anfdmax; fd--; )
714 if (anfds [fd].events)
715 {
716 fd_kill (EV_A_ fd);
717 return;
718 }
719}
720
721/* usually called after fork if backend needs to re-arm all fds from scratch */
722static void noinline
723fd_rearm_all (EV_P)
724{
725 int fd;
726
727 for (fd = 0; fd < anfdmax; ++fd)
728 if (anfds [fd].events)
729 {
730 anfds [fd].events = 0;
731 fd_change (EV_A_ fd, EV_IOFDSET | 1);
732 }
733}
734
735/*****************************************************************************/
736
737void inline_speed
738upheap (WT *heap, int k)
739{
740 WT w = heap [k];
741
742 while (k)
743 {
744 int p = (k - 1) >> 1;
745
746 if (heap [p]->at <= w->at)
747 break;
748
749 heap [k] = heap [p];
750 ((W)heap [k])->active = k + 1;
751 k = p;
752 }
753
754 heap [k] = w;
755 ((W)heap [k])->active = k + 1;
756}
757
758void inline_speed
759downheap (WT *heap, int N, int k)
760{
761 WT w = heap [k];
762
763 for (;;)
764 {
765 int c = (k << 1) + 1;
766
767 if (c >= N)
768 break;
769
770 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
771 ? 1 : 0;
772
773 if (w->at <= heap [c]->at)
774 break;
775
776 heap [k] = heap [c];
777 ((W)heap [k])->active = k + 1;
778
779 k = c;
780 }
781
782 heap [k] = w;
783 ((W)heap [k])->active = k + 1;
784}
785
786void inline_size
787adjustheap (WT *heap, int N, int k)
788{
789 upheap (heap, k);
790 downheap (heap, N, k);
791}
792
793/*****************************************************************************/
794
123typedef struct 795typedef struct
124{ 796{
125 struct ev_io *head; 797 WL head;
126 unsigned char wev, rev; /* want, received event set */ 798 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; 799} ANSIG;
260 800
261static ANSIG *signals; 801static ANSIG *signals;
262static int signalmax; 802static int signalmax;
263 803
264static int sigpipe [2]; 804static EV_ATOMIC_T gotsig;
265static sig_atomic_t gotsig;
266static struct ev_io sigev;
267 805
268static void 806void inline_size
269signals_init (ANSIG *base, int count) 807signals_init (ANSIG *base, int count)
270{ 808{
271 while (count--) 809 while (count--)
272 { 810 {
273 base->head = 0; 811 base->head = 0;
274 base->gotsig = 0; 812 base->gotsig = 0;
813
275 ++base; 814 ++base;
276 } 815 }
277} 816}
278 817
818/*****************************************************************************/
819
820void inline_speed
821fd_intern (int fd)
822{
823#ifdef _WIN32
824 int arg = 1;
825 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
826#else
827 fcntl (fd, F_SETFD, FD_CLOEXEC);
828 fcntl (fd, F_SETFL, O_NONBLOCK);
829#endif
830}
831
832static void noinline
833evpipe_init (EV_P)
834{
835 if (!ev_is_active (&pipeev))
836 {
837#if EV_USE_EVENTFD
838 if ((evfd = eventfd (0, 0)) >= 0)
839 {
840 evpipe [0] = -1;
841 fd_intern (evfd);
842 ev_io_set (&pipeev, evfd, EV_READ);
843 }
844 else
845#endif
846 {
847 while (pipe (evpipe))
848 syserr ("(libev) error creating signal/async pipe");
849
850 fd_intern (evpipe [0]);
851 fd_intern (evpipe [1]);
852 ev_io_set (&pipeev, evpipe [0], EV_READ);
853 }
854
855 ev_io_start (EV_A_ &pipeev);
856 ev_unref (EV_A); /* watcher should not keep loop alive */
857 }
858}
859
860void inline_size
861evpipe_write (EV_P_ EV_ATOMIC_T *flag)
862{
863 if (!*flag)
864 {
865 int old_errno = errno; /* save errno because write might clobber it */
866
867 *flag = 1;
868
869#if EV_USE_EVENTFD
870 if (evfd >= 0)
871 {
872 uint64_t counter = 1;
873 write (evfd, &counter, sizeof (uint64_t));
874 }
875 else
876#endif
877 write (evpipe [1], &old_errno, 1);
878
879 errno = old_errno;
880 }
881}
882
279static void 883static void
884pipecb (EV_P_ ev_io *iow, int revents)
885{
886#if EV_USE_EVENTFD
887 if (evfd >= 0)
888 {
889 uint64_t counter = 1;
890 read (evfd, &counter, sizeof (uint64_t));
891 }
892 else
893#endif
894 {
895 char dummy;
896 read (evpipe [0], &dummy, 1);
897 }
898
899 if (gotsig && ev_is_default_loop (EV_A))
900 {
901 int signum;
902 gotsig = 0;
903
904 for (signum = signalmax; signum--; )
905 if (signals [signum].gotsig)
906 ev_feed_signal_event (EV_A_ signum + 1);
907 }
908
909#if EV_ASYNC_ENABLE
910 if (gotasync)
911 {
912 int i;
913 gotasync = 0;
914
915 for (i = asynccnt; i--; )
916 if (asyncs [i]->sent)
917 {
918 asyncs [i]->sent = 0;
919 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
920 }
921 }
922#endif
923}
924
925/*****************************************************************************/
926
927static void
280sighandler (int signum) 928ev_sighandler (int signum)
281{ 929{
930#if EV_MULTIPLICITY
931 struct ev_loop *loop = &default_loop_struct;
932#endif
933
934#if _WIN32
935 signal (signum, ev_sighandler);
936#endif
937
282 signals [signum - 1].gotsig = 1; 938 signals [signum - 1].gotsig = 1;
939 evpipe_write (EV_A_ &gotsig);
940}
283 941
284 if (!gotsig) 942void noinline
943ev_feed_signal_event (EV_P_ int signum)
944{
945 WL w;
946
947#if EV_MULTIPLICITY
948 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
949#endif
950
951 --signum;
952
953 if (signum < 0 || signum >= signalmax)
954 return;
955
956 signals [signum].gotsig = 0;
957
958 for (w = signals [signum].head; w; w = w->next)
959 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
960}
961
962/*****************************************************************************/
963
964static WL childs [EV_PID_HASHSIZE];
965
966#ifndef _WIN32
967
968static ev_signal childev;
969
970#ifndef WIFCONTINUED
971# define WIFCONTINUED(status) 0
972#endif
973
974void inline_speed
975child_reap (EV_P_ int chain, int pid, int status)
976{
977 ev_child *w;
978 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
979
980 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
981 {
982 if ((w->pid == pid || !w->pid)
983 && (!traced || (w->flags & 1)))
984 {
985 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
986 w->rpid = pid;
987 w->rstatus = status;
988 ev_feed_event (EV_A_ (W)w, EV_CHILD);
989 }
990 }
991}
992
993#ifndef WCONTINUED
994# define WCONTINUED 0
995#endif
996
997static void
998childcb (EV_P_ ev_signal *sw, int revents)
999{
1000 int pid, status;
1001
1002 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1003 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1004 if (!WCONTINUED
1005 || errno != EINVAL
1006 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1007 return;
1008
1009 /* make sure we are called again until all children have been reaped */
1010 /* we need to do it this way so that the callback gets called before we continue */
1011 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1012
1013 child_reap (EV_A_ pid, pid, status);
1014 if (EV_PID_HASHSIZE > 1)
1015 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1016}
1017
1018#endif
1019
1020/*****************************************************************************/
1021
1022#if EV_USE_PORT
1023# include "ev_port.c"
1024#endif
1025#if EV_USE_KQUEUE
1026# include "ev_kqueue.c"
1027#endif
1028#if EV_USE_EPOLL
1029# include "ev_epoll.c"
1030#endif
1031#if EV_USE_POLL
1032# include "ev_poll.c"
1033#endif
1034#if EV_USE_SELECT
1035# include "ev_select.c"
1036#endif
1037
1038int
1039ev_version_major (void)
1040{
1041 return EV_VERSION_MAJOR;
1042}
1043
1044int
1045ev_version_minor (void)
1046{
1047 return EV_VERSION_MINOR;
1048}
1049
1050/* return true if we are running with elevated privileges and should ignore env variables */
1051int inline_size
1052enable_secure (void)
1053{
1054#ifdef _WIN32
1055 return 0;
1056#else
1057 return getuid () != geteuid ()
1058 || getgid () != getegid ();
1059#endif
1060}
1061
1062unsigned int
1063ev_supported_backends (void)
1064{
1065 unsigned int flags = 0;
1066
1067 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1068 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1069 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1070 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1071 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1072
1073 return flags;
1074}
1075
1076unsigned int
1077ev_recommended_backends (void)
1078{
1079 unsigned int flags = ev_supported_backends ();
1080
1081#ifndef __NetBSD__
1082 /* kqueue is borked on everything but netbsd apparently */
1083 /* it usually doesn't work correctly on anything but sockets and pipes */
1084 flags &= ~EVBACKEND_KQUEUE;
1085#endif
1086#ifdef __APPLE__
1087 // flags &= ~EVBACKEND_KQUEUE; for documentation
1088 flags &= ~EVBACKEND_POLL;
1089#endif
1090
1091 return flags;
1092}
1093
1094unsigned int
1095ev_embeddable_backends (void)
1096{
1097 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1098
1099 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1100 /* please fix it and tell me how to detect the fix */
1101 flags &= ~EVBACKEND_EPOLL;
1102
1103 return flags;
1104}
1105
1106unsigned int
1107ev_backend (EV_P)
1108{
1109 return backend;
1110}
1111
1112unsigned int
1113ev_loop_count (EV_P)
1114{
1115 return loop_count;
1116}
1117
1118void
1119ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1120{
1121 io_blocktime = interval;
1122}
1123
1124void
1125ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1126{
1127 timeout_blocktime = interval;
1128}
1129
1130static void noinline
1131loop_init (EV_P_ unsigned int flags)
1132{
1133 if (!backend)
1134 {
1135#if EV_USE_MONOTONIC
285 { 1136 {
1137 struct timespec ts;
1138 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1139 have_monotonic = 1;
1140 }
1141#endif
1142
1143 ev_rt_now = ev_time ();
1144 mn_now = get_clock ();
1145 now_floor = mn_now;
1146 rtmn_diff = ev_rt_now - mn_now;
1147
1148 io_blocktime = 0.;
1149 timeout_blocktime = 0.;
1150 backend = 0;
1151 backend_fd = -1;
1152 gotasync = 0;
1153#if EV_USE_INOTIFY
1154 fs_fd = -2;
1155#endif
1156
1157 /* pid check not overridable via env */
1158#ifndef _WIN32
1159 if (flags & EVFLAG_FORKCHECK)
1160 curpid = getpid ();
1161#endif
1162
1163 if (!(flags & EVFLAG_NOENV)
1164 && !enable_secure ()
1165 && getenv ("LIBEV_FLAGS"))
1166 flags = atoi (getenv ("LIBEV_FLAGS"));
1167
1168 if (!(flags & 0x0000ffffUL))
1169 flags |= ev_recommended_backends ();
1170
1171#if EV_USE_PORT
1172 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1173#endif
1174#if EV_USE_KQUEUE
1175 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1176#endif
1177#if EV_USE_EPOLL
1178 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1179#endif
1180#if EV_USE_POLL
1181 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1182#endif
1183#if EV_USE_SELECT
1184 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1185#endif
1186
1187 ev_init (&pipeev, pipecb);
1188 ev_set_priority (&pipeev, EV_MAXPRI);
1189 }
1190}
1191
1192static void noinline
1193loop_destroy (EV_P)
1194{
1195 int i;
1196
1197 if (ev_is_active (&pipeev))
1198 {
1199 ev_ref (EV_A); /* signal watcher */
1200 ev_io_stop (EV_A_ &pipeev);
1201
1202#if EV_USE_EVENTFD
1203 if (evfd >= 0)
1204 close (evfd);
1205#endif
1206
1207 if (evpipe [0] >= 0)
1208 {
1209 close (evpipe [0]);
1210 close (evpipe [1]);
1211 }
1212 }
1213
1214#if EV_USE_INOTIFY
1215 if (fs_fd >= 0)
1216 close (fs_fd);
1217#endif
1218
1219 if (backend_fd >= 0)
1220 close (backend_fd);
1221
1222#if EV_USE_PORT
1223 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1224#endif
1225#if EV_USE_KQUEUE
1226 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1227#endif
1228#if EV_USE_EPOLL
1229 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1230#endif
1231#if EV_USE_POLL
1232 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1233#endif
1234#if EV_USE_SELECT
1235 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1236#endif
1237
1238 for (i = NUMPRI; i--; )
1239 {
1240 array_free (pending, [i]);
1241#if EV_IDLE_ENABLE
1242 array_free (idle, [i]);
1243#endif
1244 }
1245
1246 ev_free (anfds); anfdmax = 0;
1247
1248 /* have to use the microsoft-never-gets-it-right macro */
1249 array_free (fdchange, EMPTY);
1250 array_free (timer, EMPTY);
1251#if EV_PERIODIC_ENABLE
1252 array_free (periodic, EMPTY);
1253#endif
1254#if EV_FORK_ENABLE
1255 array_free (fork, EMPTY);
1256#endif
1257 array_free (prepare, EMPTY);
1258 array_free (check, EMPTY);
1259#if EV_ASYNC_ENABLE
1260 array_free (async, EMPTY);
1261#endif
1262
1263 backend = 0;
1264}
1265
1266void inline_size infy_fork (EV_P);
1267
1268void inline_size
1269loop_fork (EV_P)
1270{
1271#if EV_USE_PORT
1272 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1273#endif
1274#if EV_USE_KQUEUE
1275 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1276#endif
1277#if EV_USE_EPOLL
1278 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1279#endif
1280#if EV_USE_INOTIFY
1281 infy_fork (EV_A);
1282#endif
1283
1284 if (ev_is_active (&pipeev))
1285 {
1286 /* this "locks" the handlers against writing to the pipe */
1287 /* while we modify the fd vars */
286 gotsig = 1; 1288 gotsig = 1;
287 write (sigpipe [1], &gotsig, 1); 1289#if EV_ASYNC_ENABLE
1290 gotasync = 1;
1291#endif
1292
1293 ev_ref (EV_A);
1294 ev_io_stop (EV_A_ &pipeev);
1295
1296#if EV_USE_EVENTFD
1297 if (evfd >= 0)
1298 close (evfd);
1299#endif
1300
1301 if (evpipe [0] >= 0)
1302 {
1303 close (evpipe [0]);
1304 close (evpipe [1]);
1305 }
1306
1307 evpipe_init (EV_A);
1308 /* now iterate over everything, in case we missed something */
1309 pipecb (EV_A_ &pipeev, EV_READ);
1310 }
1311
1312 postfork = 0;
1313}
1314
1315#if EV_MULTIPLICITY
1316struct ev_loop *
1317ev_loop_new (unsigned int flags)
1318{
1319 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1320
1321 memset (loop, 0, sizeof (struct ev_loop));
1322
1323 loop_init (EV_A_ flags);
1324
1325 if (ev_backend (EV_A))
1326 return loop;
1327
1328 return 0;
1329}
1330
1331void
1332ev_loop_destroy (EV_P)
1333{
1334 loop_destroy (EV_A);
1335 ev_free (loop);
1336}
1337
1338void
1339ev_loop_fork (EV_P)
1340{
1341 postfork = 1; /* must be in line with ev_default_fork */
1342}
1343
1344#endif
1345
1346#if EV_MULTIPLICITY
1347struct ev_loop *
1348ev_default_loop_init (unsigned int flags)
1349#else
1350int
1351ev_default_loop (unsigned int flags)
1352#endif
1353{
1354 if (!ev_default_loop_ptr)
288 } 1355 {
289} 1356#if EV_MULTIPLICITY
1357 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1358#else
1359 ev_default_loop_ptr = 1;
1360#endif
290 1361
291static void 1362 loop_init (EV_A_ flags);
292sigcb (struct ev_io *iow, int revents) 1363
1364 if (ev_backend (EV_A))
1365 {
1366#ifndef _WIN32
1367 ev_signal_init (&childev, childcb, SIGCHLD);
1368 ev_set_priority (&childev, EV_MAXPRI);
1369 ev_signal_start (EV_A_ &childev);
1370 ev_unref (EV_A); /* child watcher should not keep loop alive */
1371#endif
1372 }
1373 else
1374 ev_default_loop_ptr = 0;
1375 }
1376
1377 return ev_default_loop_ptr;
1378}
1379
1380void
1381ev_default_destroy (void)
293{ 1382{
294 struct ev_signal *w; 1383#if EV_MULTIPLICITY
1384 struct ev_loop *loop = ev_default_loop_ptr;
1385#endif
1386
1387#ifndef _WIN32
1388 ev_ref (EV_A); /* child watcher */
1389 ev_signal_stop (EV_A_ &childev);
1390#endif
1391
1392 loop_destroy (EV_A);
1393}
1394
1395void
1396ev_default_fork (void)
1397{
1398#if EV_MULTIPLICITY
1399 struct ev_loop *loop = ev_default_loop_ptr;
1400#endif
1401
1402 if (backend)
1403 postfork = 1; /* must be in line with ev_loop_fork */
1404}
1405
1406/*****************************************************************************/
1407
1408void
1409ev_invoke (EV_P_ void *w, int revents)
1410{
1411 EV_CB_INVOKE ((W)w, revents);
1412}
1413
1414void inline_speed
1415call_pending (EV_P)
1416{
295 int sig; 1417 int pri;
296 1418
297 gotsig = 0; 1419 for (pri = NUMPRI; pri--; )
298 read (sigpipe [0], &revents, 1); 1420 while (pendingcnt [pri])
299
300 for (sig = signalmax; sig--; )
301 if (signals [sig].gotsig)
302 { 1421 {
303 signals [sig].gotsig = 0; 1422 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
304 1423
305 for (w = signals [sig].head; w; w = w->next) 1424 if (expect_true (p->w))
306 event ((W)w, EV_SIGNAL); 1425 {
1426 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1427
1428 p->w->pending = 0;
1429 EV_CB_INVOKE (p->w, p->events);
1430 }
307 } 1431 }
308} 1432}
309 1433
310static void 1434void 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 () 1435timers_reify (EV_P)
449{ 1436{
450 while (timercnt && timers [0]->at <= now) 1437 while (timercnt && ((WT)timers [0])->at <= mn_now)
451 { 1438 {
452 struct ev_timer *w = timers [0]; 1439 ev_timer *w = (ev_timer *)timers [0];
453 1440
454 event ((W)w, EV_TIMEOUT); 1441 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
455 1442
456 /* first reschedule or stop timer */ 1443 /* first reschedule or stop timer */
457 if (w->repeat) 1444 if (w->repeat)
458 { 1445 {
1446 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1447
459 w->at = now + w->repeat; 1448 ((WT)w)->at += w->repeat;
460 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1449 if (((WT)w)->at < mn_now)
1450 ((WT)w)->at = mn_now;
1451
461 downheap ((WT *)timers, timercnt, 0); 1452 downheap (timers, timercnt, 0);
462 } 1453 }
463 else 1454 else
464 evtimer_stop (w); /* nonrepeating: stop timer */ 1455 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
465 }
466}
467 1456
468static void 1457 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1458 }
1459}
1460
1461#if EV_PERIODIC_ENABLE
1462void inline_size
469periodics_reify () 1463periodics_reify (EV_P)
470{ 1464{
471 while (periodiccnt && periodics [0]->at <= ev_now) 1465 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
472 { 1466 {
473 struct ev_periodic *w = periodics [0]; 1467 ev_periodic *w = (ev_periodic *)periodics [0];
1468
1469 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
474 1470
475 /* first reschedule or stop timer */ 1471 /* first reschedule or stop timer */
476 if (w->interval) 1472 if (w->reschedule_cb)
477 { 1473 {
478 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1474 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
479 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1475 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
480 downheap ((WT *)periodics, periodiccnt, 0); 1476 downheap (periodics, periodiccnt, 0);
1477 }
1478 else if (w->interval)
1479 {
1480 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1481 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1482 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1483 downheap (periodics, periodiccnt, 0);
481 } 1484 }
482 else 1485 else
483 evperiodic_stop (w); /* nonrepeating: stop timer */ 1486 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
484 1487
485 event ((W)w, EV_TIMEOUT); 1488 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
486 } 1489 }
487} 1490}
488 1491
489static void 1492static void noinline
490periodics_reschedule (ev_tstamp diff) 1493periodics_reschedule (EV_P)
491{ 1494{
492 int i; 1495 int i;
493 1496
494 /* adjust periodics after time jump */ 1497 /* adjust periodics after time jump */
495 for (i = 0; i < periodiccnt; ++i) 1498 for (i = 0; i < periodiccnt; ++i)
496 { 1499 {
497 struct ev_periodic *w = periodics [i]; 1500 ev_periodic *w = (ev_periodic *)periodics [i];
498 1501
1502 if (w->reschedule_cb)
1503 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
499 if (w->interval) 1504 else if (w->interval)
1505 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1506 }
1507
1508 /* now rebuild the heap */
1509 for (i = periodiccnt >> 1; i--; )
1510 downheap (periodics, periodiccnt, i);
1511}
1512#endif
1513
1514#if EV_IDLE_ENABLE
1515void inline_size
1516idle_reify (EV_P)
1517{
1518 if (expect_false (idleall))
1519 {
1520 int pri;
1521
1522 for (pri = NUMPRI; pri--; )
500 { 1523 {
501 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1524 if (pendingcnt [pri])
1525 break;
502 1526
503 if (fabs (diff) >= 1e-4) 1527 if (idlecnt [pri])
504 { 1528 {
505 evperiodic_stop (w); 1529 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
506 evperiodic_start (w); 1530 break;
507
508 i = 0; /* restart loop, inefficient, but time jumps should be rare */
509 } 1531 }
510 } 1532 }
511 } 1533 }
512} 1534}
1535#endif
513 1536
514static void 1537void inline_speed
515time_update () 1538time_update (EV_P_ ev_tstamp max_block)
516{ 1539{
517 int i; 1540 int i;
518 1541
519 ev_now = ev_time (); 1542#if EV_USE_MONOTONIC
520
521 if (have_monotonic) 1543 if (expect_true (have_monotonic))
522 { 1544 {
523 ev_tstamp odiff = diff; 1545 ev_tstamp odiff = rtmn_diff;
524 1546
525 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1547 mn_now = get_clock ();
1548
1549 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1550 /* interpolate in the meantime */
1551 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
526 { 1552 {
527 now = get_clock (); 1553 ev_rt_now = rtmn_diff + mn_now;
1554 return;
1555 }
1556
1557 now_floor = mn_now;
1558 ev_rt_now = ev_time ();
1559
1560 /* loop a few times, before making important decisions.
1561 * on the choice of "4": one iteration isn't enough,
1562 * in case we get preempted during the calls to
1563 * ev_time and get_clock. a second call is almost guaranteed
1564 * to succeed in that case, though. and looping a few more times
1565 * doesn't hurt either as we only do this on time-jumps or
1566 * in the unlikely event of having been preempted here.
1567 */
1568 for (i = 4; --i; )
1569 {
528 diff = ev_now - now; 1570 rtmn_diff = ev_rt_now - mn_now;
529 1571
530 if (fabs (odiff - diff) < MIN_TIMEJUMP) 1572 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
531 return; /* all is well */ 1573 return; /* all is well */
532 1574
533 ev_now = ev_time (); 1575 ev_rt_now = ev_time ();
1576 mn_now = get_clock ();
1577 now_floor = mn_now;
534 } 1578 }
535 1579
1580# if EV_PERIODIC_ENABLE
536 periodics_reschedule (diff - odiff); 1581 periodics_reschedule (EV_A);
1582# endif
537 /* no timer adjustment, as the monotonic clock doesn't jump */ 1583 /* no timer adjustment, as the monotonic clock doesn't jump */
1584 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
538 } 1585 }
539 else 1586 else
1587#endif
540 { 1588 {
541 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 1589 ev_rt_now = ev_time ();
1590
1591 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
542 { 1592 {
1593#if EV_PERIODIC_ENABLE
543 periodics_reschedule (ev_now - now); 1594 periodics_reschedule (EV_A);
544 1595#endif
545 /* adjust timers. this is easy, as the offset is the same for all */ 1596 /* adjust timers. this is easy, as the offset is the same for all of them */
546 for (i = 0; i < timercnt; ++i) 1597 for (i = 0; i < timercnt; ++i)
547 timers [i]->at += diff; 1598 ((WT)timers [i])->at += ev_rt_now - mn_now;
548 } 1599 }
549 1600
550 now = ev_now; 1601 mn_now = ev_rt_now;
551 } 1602 }
552} 1603}
553 1604
554int ev_loop_done; 1605void
1606ev_ref (EV_P)
1607{
1608 ++activecnt;
1609}
555 1610
1611void
1612ev_unref (EV_P)
1613{
1614 --activecnt;
1615}
1616
1617static int loop_done;
1618
1619void
556void ev_loop (int flags) 1620ev_loop (EV_P_ int flags)
557{ 1621{
558 double block; 1622 loop_done = EVUNLOOP_CANCEL;
559 ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0; 1623
1624 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
560 1625
561 do 1626 do
562 { 1627 {
1628#ifndef _WIN32
1629 if (expect_false (curpid)) /* penalise the forking check even more */
1630 if (expect_false (getpid () != curpid))
1631 {
1632 curpid = getpid ();
1633 postfork = 1;
1634 }
1635#endif
1636
1637#if EV_FORK_ENABLE
1638 /* we might have forked, so queue fork handlers */
1639 if (expect_false (postfork))
1640 if (forkcnt)
1641 {
1642 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1643 call_pending (EV_A);
1644 }
1645#endif
1646
563 /* queue check watchers (and execute them) */ 1647 /* queue prepare watchers (and execute them) */
564 if (preparecnt) 1648 if (expect_false (preparecnt))
565 { 1649 {
566 queue_events ((W *)prepares, preparecnt, EV_PREPARE); 1650 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
567 call_pending (); 1651 call_pending (EV_A);
568 } 1652 }
569 1653
1654 if (expect_false (!activecnt))
1655 break;
1656
1657 /* we might have forked, so reify kernel state if necessary */
1658 if (expect_false (postfork))
1659 loop_fork (EV_A);
1660
570 /* update fd-related kernel structures */ 1661 /* update fd-related kernel structures */
571 fd_reify (); 1662 fd_reify (EV_A);
572 1663
573 /* calculate blocking time */ 1664 /* calculate blocking time */
1665 {
1666 ev_tstamp waittime = 0.;
1667 ev_tstamp sleeptime = 0.;
574 1668
575 /* we only need this for !monotonic clockor timers, but as we basically 1669 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 { 1670 {
1671 /* update time to cancel out callback processing overhead */
1672 time_update (EV_A_ 1e100);
1673
583 block = MAX_BLOCKTIME; 1674 waittime = MAX_BLOCKTIME;
584 1675
585 if (timercnt) 1676 if (timercnt)
586 { 1677 {
587 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 1678 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
588 if (block > to) block = to; 1679 if (waittime > to) waittime = to;
589 } 1680 }
590 1681
1682#if EV_PERIODIC_ENABLE
591 if (periodiccnt) 1683 if (periodiccnt)
592 { 1684 {
593 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1685 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
594 if (block > to) block = to; 1686 if (waittime > to) waittime = to;
595 } 1687 }
1688#endif
596 1689
597 if (block < 0.) block = 0.; 1690 if (expect_false (waittime < timeout_blocktime))
1691 waittime = timeout_blocktime;
1692
1693 sleeptime = waittime - backend_fudge;
1694
1695 if (expect_true (sleeptime > io_blocktime))
1696 sleeptime = io_blocktime;
1697
1698 if (sleeptime)
1699 {
1700 ev_sleep (sleeptime);
1701 waittime -= sleeptime;
1702 }
598 } 1703 }
599 1704
600 method_poll (block); 1705 ++loop_count;
1706 backend_poll (EV_A_ waittime);
601 1707
602 /* update ev_now, do magic */ 1708 /* update ev_rt_now, do magic */
603 time_update (); 1709 time_update (EV_A_ waittime + sleeptime);
1710 }
604 1711
605 /* queue pending timers and reschedule them */ 1712 /* queue pending timers and reschedule them */
606 timers_reify (); /* relative timers called last */ 1713 timers_reify (EV_A); /* relative timers called last */
1714#if EV_PERIODIC_ENABLE
607 periodics_reify (); /* absolute timers called first */ 1715 periodics_reify (EV_A); /* absolute timers called first */
1716#endif
608 1717
1718#if EV_IDLE_ENABLE
609 /* queue idle watchers unless io or timers are pending */ 1719 /* queue idle watchers unless other events are pending */
610 if (!pendingcnt) 1720 idle_reify (EV_A);
611 queue_events ((W *)idles, idlecnt, EV_IDLE); 1721#endif
612 1722
613 /* queue check watchers, to be executed first */ 1723 /* queue check watchers, to be executed first */
614 if (checkcnt) 1724 if (expect_false (checkcnt))
615 queue_events ((W *)checks, checkcnt, EV_CHECK); 1725 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
616 1726
617 call_pending (); 1727 call_pending (EV_A);
618 } 1728 }
619 while (!ev_loop_done); 1729 while (expect_true (
1730 activecnt
1731 && !loop_done
1732 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1733 ));
620 1734
621 if (ev_loop_done != 2) 1735 if (loop_done == EVUNLOOP_ONE)
1736 loop_done = EVUNLOOP_CANCEL;
1737}
1738
1739void
1740ev_unloop (EV_P_ int how)
1741{
622 ev_loop_done = 0; 1742 loop_done = how;
623} 1743}
624 1744
625/*****************************************************************************/ 1745/*****************************************************************************/
626 1746
627static void 1747void inline_size
628wlist_add (WL *head, WL elem) 1748wlist_add (WL *head, WL elem)
629{ 1749{
630 elem->next = *head; 1750 elem->next = *head;
631 *head = elem; 1751 *head = elem;
632} 1752}
633 1753
634static void 1754void inline_size
635wlist_del (WL *head, WL elem) 1755wlist_del (WL *head, WL elem)
636{ 1756{
637 while (*head) 1757 while (*head)
638 { 1758 {
639 if (*head == elem) 1759 if (*head == elem)
… …
644 1764
645 head = &(*head)->next; 1765 head = &(*head)->next;
646 } 1766 }
647} 1767}
648 1768
649static void 1769void inline_speed
650ev_clear (W w) 1770clear_pending (EV_P_ W w)
651{ 1771{
652 if (w->pending) 1772 if (w->pending)
653 { 1773 {
654 pendings [w->pending - 1].w = 0; 1774 pendings [ABSPRI (w)][w->pending - 1].w = 0;
655 w->pending = 0; 1775 w->pending = 0;
656 } 1776 }
657} 1777}
658 1778
659static void 1779int
1780ev_clear_pending (EV_P_ void *w)
1781{
1782 W w_ = (W)w;
1783 int pending = w_->pending;
1784
1785 if (expect_true (pending))
1786 {
1787 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1788 w_->pending = 0;
1789 p->w = 0;
1790 return p->events;
1791 }
1792 else
1793 return 0;
1794}
1795
1796void inline_size
1797pri_adjust (EV_P_ W w)
1798{
1799 int pri = w->priority;
1800 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1801 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1802 w->priority = pri;
1803}
1804
1805void inline_speed
660ev_start (W w, int active) 1806ev_start (EV_P_ W w, int active)
661{ 1807{
1808 pri_adjust (EV_A_ w);
662 w->active = active; 1809 w->active = active;
1810 ev_ref (EV_A);
663} 1811}
664 1812
665static void 1813void inline_size
666ev_stop (W w) 1814ev_stop (EV_P_ W w)
667{ 1815{
1816 ev_unref (EV_A);
668 w->active = 0; 1817 w->active = 0;
669} 1818}
670 1819
671/*****************************************************************************/ 1820/*****************************************************************************/
672 1821
673void 1822void noinline
674evio_start (struct ev_io *w) 1823ev_io_start (EV_P_ ev_io *w)
675{ 1824{
676 if (ev_is_active (w))
677 return;
678
679 int fd = w->fd; 1825 int fd = w->fd;
680 1826
1827 if (expect_false (ev_is_active (w)))
1828 return;
1829
1830 assert (("ev_io_start called with negative fd", fd >= 0));
1831
681 ev_start ((W)w, 1); 1832 ev_start (EV_A_ (W)w, 1);
682 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1833 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
683 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1834 wlist_add (&anfds[fd].head, (WL)w);
684 1835
685 ++fdchangecnt; 1836 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
686 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1837 w->events &= ~EV_IOFDSET;
687 fdchanges [fdchangecnt - 1] = fd;
688} 1838}
689 1839
690void 1840void noinline
691evio_stop (struct ev_io *w) 1841ev_io_stop (EV_P_ ev_io *w)
692{ 1842{
693 ev_clear ((W)w); 1843 clear_pending (EV_A_ (W)w);
694 if (!ev_is_active (w)) 1844 if (expect_false (!ev_is_active (w)))
695 return; 1845 return;
696 1846
1847 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1848
697 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1849 wlist_del (&anfds[w->fd].head, (WL)w);
698 ev_stop ((W)w); 1850 ev_stop (EV_A_ (W)w);
699 1851
700 ++fdchangecnt; 1852 fd_change (EV_A_ w->fd, 1);
701 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
702 fdchanges [fdchangecnt - 1] = w->fd;
703} 1853}
704 1854
705void 1855void noinline
706evtimer_start (struct ev_timer *w) 1856ev_timer_start (EV_P_ ev_timer *w)
707{ 1857{
708 if (ev_is_active (w)) 1858 if (expect_false (ev_is_active (w)))
709 return; 1859 return;
710 1860
711 w->at += now; 1861 ((WT)w)->at += mn_now;
712 1862
713 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 1863 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
714 1864
715 ev_start ((W)w, ++timercnt); 1865 ev_start (EV_A_ (W)w, ++timercnt);
716 array_needsize (timers, timermax, timercnt, ); 1866 array_needsize (WT, timers, timermax, timercnt, EMPTY2);
717 timers [timercnt - 1] = w; 1867 timers [timercnt - 1] = (WT)w;
718 upheap ((WT *)timers, timercnt - 1); 1868 upheap (timers, timercnt - 1);
719}
720 1869
721void 1870 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
1871}
1872
1873void noinline
722evtimer_stop (struct ev_timer *w) 1874ev_timer_stop (EV_P_ ev_timer *w)
723{ 1875{
724 ev_clear ((W)w); 1876 clear_pending (EV_A_ (W)w);
725 if (!ev_is_active (w)) 1877 if (expect_false (!ev_is_active (w)))
726 return; 1878 return;
727 1879
728 if (w->active < timercnt--) 1880 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
1881
1882 {
1883 int active = ((W)w)->active;
1884
1885 if (expect_true (--active < --timercnt))
729 { 1886 {
730 timers [w->active - 1] = timers [timercnt]; 1887 timers [active] = timers [timercnt];
731 downheap ((WT *)timers, timercnt, w->active - 1); 1888 adjustheap (timers, timercnt, active);
732 } 1889 }
1890 }
733 1891
734 w->at = w->repeat; 1892 ((WT)w)->at -= mn_now;
735 1893
736 ev_stop ((W)w); 1894 ev_stop (EV_A_ (W)w);
737} 1895}
738 1896
739void 1897void noinline
740evtimer_again (struct ev_timer *w) 1898ev_timer_again (EV_P_ ev_timer *w)
741{ 1899{
742 if (ev_is_active (w)) 1900 if (ev_is_active (w))
743 { 1901 {
744 if (w->repeat) 1902 if (w->repeat)
745 { 1903 {
746 w->at = now + w->repeat; 1904 ((WT)w)->at = mn_now + w->repeat;
747 downheap ((WT *)timers, timercnt, w->active - 1); 1905 adjustheap (timers, timercnt, ((W)w)->active - 1);
748 } 1906 }
749 else 1907 else
750 evtimer_stop (w); 1908 ev_timer_stop (EV_A_ w);
751 } 1909 }
752 else if (w->repeat) 1910 else if (w->repeat)
1911 {
1912 w->at = w->repeat;
753 evtimer_start (w); 1913 ev_timer_start (EV_A_ w);
1914 }
754} 1915}
755 1916
756void 1917#if EV_PERIODIC_ENABLE
1918void noinline
757evperiodic_start (struct ev_periodic *w) 1919ev_periodic_start (EV_P_ ev_periodic *w)
758{ 1920{
759 if (ev_is_active (w)) 1921 if (expect_false (ev_is_active (w)))
760 return; 1922 return;
761 1923
762 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 1924 if (w->reschedule_cb)
763 1925 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1926 else if (w->interval)
1927 {
1928 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 */ 1929 /* 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; 1930 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1931 }
1932 else
1933 ((WT)w)->at = w->offset;
767 1934
768 ev_start ((W)w, ++periodiccnt); 1935 ev_start (EV_A_ (W)w, ++periodiccnt);
769 array_needsize (periodics, periodicmax, periodiccnt, ); 1936 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
770 periodics [periodiccnt - 1] = w; 1937 periodics [periodiccnt - 1] = (WT)w;
771 upheap ((WT *)periodics, periodiccnt - 1); 1938 upheap (periodics, periodiccnt - 1);
772}
773 1939
774void 1940 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
1941}
1942
1943void noinline
775evperiodic_stop (struct ev_periodic *w) 1944ev_periodic_stop (EV_P_ ev_periodic *w)
776{ 1945{
777 ev_clear ((W)w); 1946 clear_pending (EV_A_ (W)w);
778 if (!ev_is_active (w)) 1947 if (expect_false (!ev_is_active (w)))
779 return; 1948 return;
780 1949
781 if (w->active < periodiccnt--) 1950 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
1951
1952 {
1953 int active = ((W)w)->active;
1954
1955 if (expect_true (--active < --periodiccnt))
782 { 1956 {
783 periodics [w->active - 1] = periodics [periodiccnt]; 1957 periodics [active] = periodics [periodiccnt];
784 downheap ((WT *)periodics, periodiccnt, w->active - 1); 1958 adjustheap (periodics, periodiccnt, active);
785 } 1959 }
1960 }
786 1961
787 ev_stop ((W)w); 1962 ev_stop (EV_A_ (W)w);
788} 1963}
789 1964
790void 1965void noinline
1966ev_periodic_again (EV_P_ ev_periodic *w)
1967{
1968 /* TODO: use adjustheap and recalculation */
1969 ev_periodic_stop (EV_A_ w);
1970 ev_periodic_start (EV_A_ w);
1971}
1972#endif
1973
1974#ifndef SA_RESTART
1975# define SA_RESTART 0
1976#endif
1977
1978void noinline
791evsignal_start (struct ev_signal *w) 1979ev_signal_start (EV_P_ ev_signal *w)
792{ 1980{
1981#if EV_MULTIPLICITY
1982 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1983#endif
793 if (ev_is_active (w)) 1984 if (expect_false (ev_is_active (w)))
794 return; 1985 return;
795 1986
796 ev_start ((W)w, 1); 1987 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1988
1989 evpipe_init (EV_A);
1990
1991 {
1992#ifndef _WIN32
1993 sigset_t full, prev;
1994 sigfillset (&full);
1995 sigprocmask (SIG_SETMASK, &full, &prev);
1996#endif
1997
797 array_needsize (signals, signalmax, w->signum, signals_init); 1998 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1999
2000#ifndef _WIN32
2001 sigprocmask (SIG_SETMASK, &prev, 0);
2002#endif
2003 }
2004
2005 ev_start (EV_A_ (W)w, 1);
798 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2006 wlist_add (&signals [w->signum - 1].head, (WL)w);
799 2007
800 if (!w->next) 2008 if (!((WL)w)->next)
801 { 2009 {
2010#if _WIN32
2011 signal (w->signum, ev_sighandler);
2012#else
802 struct sigaction sa; 2013 struct sigaction sa;
803 sa.sa_handler = sighandler; 2014 sa.sa_handler = ev_sighandler;
804 sigfillset (&sa.sa_mask); 2015 sigfillset (&sa.sa_mask);
805 sa.sa_flags = 0; 2016 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
806 sigaction (w->signum, &sa, 0); 2017 sigaction (w->signum, &sa, 0);
2018#endif
807 } 2019 }
808} 2020}
809 2021
810void 2022void noinline
811evsignal_stop (struct ev_signal *w) 2023ev_signal_stop (EV_P_ ev_signal *w)
812{ 2024{
813 ev_clear ((W)w); 2025 clear_pending (EV_A_ (W)w);
814 if (!ev_is_active (w)) 2026 if (expect_false (!ev_is_active (w)))
815 return; 2027 return;
816 2028
817 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2029 wlist_del (&signals [w->signum - 1].head, (WL)w);
818 ev_stop ((W)w); 2030 ev_stop (EV_A_ (W)w);
819 2031
820 if (!signals [w->signum - 1].head) 2032 if (!signals [w->signum - 1].head)
821 signal (w->signum, SIG_DFL); 2033 signal (w->signum, SIG_DFL);
822} 2034}
823 2035
824void evidle_start (struct ev_idle *w) 2036void
2037ev_child_start (EV_P_ ev_child *w)
825{ 2038{
2039#if EV_MULTIPLICITY
2040 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2041#endif
826 if (ev_is_active (w)) 2042 if (expect_false (ev_is_active (w)))
827 return; 2043 return;
828 2044
829 ev_start ((W)w, ++idlecnt); 2045 ev_start (EV_A_ (W)w, 1);
830 array_needsize (idles, idlemax, idlecnt, ); 2046 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
831 idles [idlecnt - 1] = w;
832} 2047}
833 2048
834void evidle_stop (struct ev_idle *w) 2049void
2050ev_child_stop (EV_P_ ev_child *w)
835{ 2051{
836 ev_clear ((W)w); 2052 clear_pending (EV_A_ (W)w);
837 if (ev_is_active (w)) 2053 if (expect_false (!ev_is_active (w)))
838 return; 2054 return;
839 2055
840 idles [w->active - 1] = idles [--idlecnt]; 2056 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
841 ev_stop ((W)w); 2057 ev_stop (EV_A_ (W)w);
842} 2058}
843 2059
2060#if EV_STAT_ENABLE
2061
2062# ifdef _WIN32
2063# undef lstat
2064# define lstat(a,b) _stati64 (a,b)
2065# endif
2066
2067#define DEF_STAT_INTERVAL 5.0074891
2068#define MIN_STAT_INTERVAL 0.1074891
2069
2070static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2071
2072#if EV_USE_INOTIFY
2073# define EV_INOTIFY_BUFSIZE 8192
2074
2075static void noinline
2076infy_add (EV_P_ ev_stat *w)
2077{
2078 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);
2079
2080 if (w->wd < 0)
2081 {
2082 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2083
2084 /* monitor some parent directory for speedup hints */
2085 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2086 {
2087 char path [4096];
2088 strcpy (path, w->path);
2089
2090 do
2091 {
2092 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2093 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2094
2095 char *pend = strrchr (path, '/');
2096
2097 if (!pend)
2098 break; /* whoops, no '/', complain to your admin */
2099
2100 *pend = 0;
2101 w->wd = inotify_add_watch (fs_fd, path, mask);
2102 }
2103 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2104 }
2105 }
2106 else
2107 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2108
2109 if (w->wd >= 0)
2110 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2111}
2112
2113static void noinline
2114infy_del (EV_P_ ev_stat *w)
2115{
2116 int slot;
2117 int wd = w->wd;
2118
2119 if (wd < 0)
2120 return;
2121
2122 w->wd = -2;
2123 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2124 wlist_del (&fs_hash [slot].head, (WL)w);
2125
2126 /* remove this watcher, if others are watching it, they will rearm */
2127 inotify_rm_watch (fs_fd, wd);
2128}
2129
2130static void noinline
2131infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2132{
2133 if (slot < 0)
2134 /* overflow, need to check for all hahs slots */
2135 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2136 infy_wd (EV_A_ slot, wd, ev);
2137 else
2138 {
2139 WL w_;
2140
2141 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2142 {
2143 ev_stat *w = (ev_stat *)w_;
2144 w_ = w_->next; /* lets us remove this watcher and all before it */
2145
2146 if (w->wd == wd || wd == -1)
2147 {
2148 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2149 {
2150 w->wd = -1;
2151 infy_add (EV_A_ w); /* re-add, no matter what */
2152 }
2153
2154 stat_timer_cb (EV_A_ &w->timer, 0);
2155 }
2156 }
2157 }
2158}
2159
2160static void
2161infy_cb (EV_P_ ev_io *w, int revents)
2162{
2163 char buf [EV_INOTIFY_BUFSIZE];
2164 struct inotify_event *ev = (struct inotify_event *)buf;
2165 int ofs;
2166 int len = read (fs_fd, buf, sizeof (buf));
2167
2168 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2169 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2170}
2171
2172void inline_size
2173infy_init (EV_P)
2174{
2175 if (fs_fd != -2)
2176 return;
2177
2178 fs_fd = inotify_init ();
2179
2180 if (fs_fd >= 0)
2181 {
2182 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2183 ev_set_priority (&fs_w, EV_MAXPRI);
2184 ev_io_start (EV_A_ &fs_w);
2185 }
2186}
2187
2188void inline_size
2189infy_fork (EV_P)
2190{
2191 int slot;
2192
2193 if (fs_fd < 0)
2194 return;
2195
2196 close (fs_fd);
2197 fs_fd = inotify_init ();
2198
2199 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2200 {
2201 WL w_ = fs_hash [slot].head;
2202 fs_hash [slot].head = 0;
2203
2204 while (w_)
2205 {
2206 ev_stat *w = (ev_stat *)w_;
2207 w_ = w_->next; /* lets us add this watcher */
2208
2209 w->wd = -1;
2210
2211 if (fs_fd >= 0)
2212 infy_add (EV_A_ w); /* re-add, no matter what */
2213 else
2214 ev_timer_start (EV_A_ &w->timer);
2215 }
2216
2217 }
2218}
2219
2220#endif
2221
2222void
2223ev_stat_stat (EV_P_ ev_stat *w)
2224{
2225 if (lstat (w->path, &w->attr) < 0)
2226 w->attr.st_nlink = 0;
2227 else if (!w->attr.st_nlink)
2228 w->attr.st_nlink = 1;
2229}
2230
2231static void noinline
2232stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2233{
2234 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2235
2236 /* we copy this here each the time so that */
2237 /* prev has the old value when the callback gets invoked */
2238 w->prev = w->attr;
2239 ev_stat_stat (EV_A_ w);
2240
2241 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2242 if (
2243 w->prev.st_dev != w->attr.st_dev
2244 || w->prev.st_ino != w->attr.st_ino
2245 || w->prev.st_mode != w->attr.st_mode
2246 || w->prev.st_nlink != w->attr.st_nlink
2247 || w->prev.st_uid != w->attr.st_uid
2248 || w->prev.st_gid != w->attr.st_gid
2249 || w->prev.st_rdev != w->attr.st_rdev
2250 || w->prev.st_size != w->attr.st_size
2251 || w->prev.st_atime != w->attr.st_atime
2252 || w->prev.st_mtime != w->attr.st_mtime
2253 || w->prev.st_ctime != w->attr.st_ctime
2254 ) {
2255 #if EV_USE_INOTIFY
2256 infy_del (EV_A_ w);
2257 infy_add (EV_A_ w);
2258 ev_stat_stat (EV_A_ w); /* avoid race... */
2259 #endif
2260
2261 ev_feed_event (EV_A_ w, EV_STAT);
2262 }
2263}
2264
2265void
2266ev_stat_start (EV_P_ ev_stat *w)
2267{
2268 if (expect_false (ev_is_active (w)))
2269 return;
2270
2271 /* since we use memcmp, we need to clear any padding data etc. */
2272 memset (&w->prev, 0, sizeof (ev_statdata));
2273 memset (&w->attr, 0, sizeof (ev_statdata));
2274
2275 ev_stat_stat (EV_A_ w);
2276
2277 if (w->interval < MIN_STAT_INTERVAL)
2278 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2279
2280 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2281 ev_set_priority (&w->timer, ev_priority (w));
2282
2283#if EV_USE_INOTIFY
2284 infy_init (EV_A);
2285
2286 if (fs_fd >= 0)
2287 infy_add (EV_A_ w);
2288 else
2289#endif
2290 ev_timer_start (EV_A_ &w->timer);
2291
2292 ev_start (EV_A_ (W)w, 1);
2293}
2294
2295void
2296ev_stat_stop (EV_P_ ev_stat *w)
2297{
2298 clear_pending (EV_A_ (W)w);
2299 if (expect_false (!ev_is_active (w)))
2300 return;
2301
2302#if EV_USE_INOTIFY
2303 infy_del (EV_A_ w);
2304#endif
2305 ev_timer_stop (EV_A_ &w->timer);
2306
2307 ev_stop (EV_A_ (W)w);
2308}
2309#endif
2310
2311#if EV_IDLE_ENABLE
2312void
2313ev_idle_start (EV_P_ ev_idle *w)
2314{
2315 if (expect_false (ev_is_active (w)))
2316 return;
2317
2318 pri_adjust (EV_A_ (W)w);
2319
2320 {
2321 int active = ++idlecnt [ABSPRI (w)];
2322
2323 ++idleall;
2324 ev_start (EV_A_ (W)w, active);
2325
2326 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2327 idles [ABSPRI (w)][active - 1] = w;
2328 }
2329}
2330
2331void
2332ev_idle_stop (EV_P_ ev_idle *w)
2333{
2334 clear_pending (EV_A_ (W)w);
2335 if (expect_false (!ev_is_active (w)))
2336 return;
2337
2338 {
2339 int active = ((W)w)->active;
2340
2341 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2342 ((W)idles [ABSPRI (w)][active - 1])->active = active;
2343
2344 ev_stop (EV_A_ (W)w);
2345 --idleall;
2346 }
2347}
2348#endif
2349
2350void
844void evprepare_start (struct ev_prepare *w) 2351ev_prepare_start (EV_P_ ev_prepare *w)
845{ 2352{
846 if (ev_is_active (w)) 2353 if (expect_false (ev_is_active (w)))
847 return; 2354 return;
848 2355
849 ev_start ((W)w, ++preparecnt); 2356 ev_start (EV_A_ (W)w, ++preparecnt);
850 array_needsize (prepares, preparemax, preparecnt, ); 2357 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
851 prepares [preparecnt - 1] = w; 2358 prepares [preparecnt - 1] = w;
852} 2359}
853 2360
2361void
854void evprepare_stop (struct ev_prepare *w) 2362ev_prepare_stop (EV_P_ ev_prepare *w)
855{ 2363{
856 ev_clear ((W)w); 2364 clear_pending (EV_A_ (W)w);
857 if (ev_is_active (w)) 2365 if (expect_false (!ev_is_active (w)))
858 return; 2366 return;
859 2367
2368 {
2369 int active = ((W)w)->active;
860 prepares [w->active - 1] = prepares [--preparecnt]; 2370 prepares [active - 1] = prepares [--preparecnt];
2371 ((W)prepares [active - 1])->active = active;
2372 }
2373
861 ev_stop ((W)w); 2374 ev_stop (EV_A_ (W)w);
862} 2375}
863 2376
2377void
864void evcheck_start (struct ev_check *w) 2378ev_check_start (EV_P_ ev_check *w)
865{ 2379{
866 if (ev_is_active (w)) 2380 if (expect_false (ev_is_active (w)))
867 return; 2381 return;
868 2382
869 ev_start ((W)w, ++checkcnt); 2383 ev_start (EV_A_ (W)w, ++checkcnt);
870 array_needsize (checks, checkmax, checkcnt, ); 2384 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
871 checks [checkcnt - 1] = w; 2385 checks [checkcnt - 1] = w;
872} 2386}
873 2387
2388void
874void evcheck_stop (struct ev_check *w) 2389ev_check_stop (EV_P_ ev_check *w)
875{ 2390{
876 ev_clear ((W)w); 2391 clear_pending (EV_A_ (W)w);
877 if (ev_is_active (w)) 2392 if (expect_false (!ev_is_active (w)))
878 return; 2393 return;
879 2394
2395 {
2396 int active = ((W)w)->active;
880 checks [w->active - 1] = checks [--checkcnt]; 2397 checks [active - 1] = checks [--checkcnt];
2398 ((W)checks [active - 1])->active = active;
2399 }
2400
881 ev_stop ((W)w); 2401 ev_stop (EV_A_ (W)w);
882} 2402}
2403
2404#if EV_EMBED_ENABLE
2405void noinline
2406ev_embed_sweep (EV_P_ ev_embed *w)
2407{
2408 ev_loop (w->other, EVLOOP_NONBLOCK);
2409}
2410
2411static void
2412embed_io_cb (EV_P_ ev_io *io, int revents)
2413{
2414 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2415
2416 if (ev_cb (w))
2417 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2418 else
2419 ev_loop (w->other, EVLOOP_NONBLOCK);
2420}
2421
2422static void
2423embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2424{
2425 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2426
2427 {
2428 struct ev_loop *loop = w->other;
2429
2430 while (fdchangecnt)
2431 {
2432 fd_reify (EV_A);
2433 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2434 }
2435 }
2436}
2437
2438#if 0
2439static void
2440embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2441{
2442 ev_idle_stop (EV_A_ idle);
2443}
2444#endif
2445
2446void
2447ev_embed_start (EV_P_ ev_embed *w)
2448{
2449 if (expect_false (ev_is_active (w)))
2450 return;
2451
2452 {
2453 struct ev_loop *loop = w->other;
2454 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2455 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2456 }
2457
2458 ev_set_priority (&w->io, ev_priority (w));
2459 ev_io_start (EV_A_ &w->io);
2460
2461 ev_prepare_init (&w->prepare, embed_prepare_cb);
2462 ev_set_priority (&w->prepare, EV_MINPRI);
2463 ev_prepare_start (EV_A_ &w->prepare);
2464
2465 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2466
2467 ev_start (EV_A_ (W)w, 1);
2468}
2469
2470void
2471ev_embed_stop (EV_P_ ev_embed *w)
2472{
2473 clear_pending (EV_A_ (W)w);
2474 if (expect_false (!ev_is_active (w)))
2475 return;
2476
2477 ev_io_stop (EV_A_ &w->io);
2478 ev_prepare_stop (EV_A_ &w->prepare);
2479
2480 ev_stop (EV_A_ (W)w);
2481}
2482#endif
2483
2484#if EV_FORK_ENABLE
2485void
2486ev_fork_start (EV_P_ ev_fork *w)
2487{
2488 if (expect_false (ev_is_active (w)))
2489 return;
2490
2491 ev_start (EV_A_ (W)w, ++forkcnt);
2492 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2493 forks [forkcnt - 1] = w;
2494}
2495
2496void
2497ev_fork_stop (EV_P_ ev_fork *w)
2498{
2499 clear_pending (EV_A_ (W)w);
2500 if (expect_false (!ev_is_active (w)))
2501 return;
2502
2503 {
2504 int active = ((W)w)->active;
2505 forks [active - 1] = forks [--forkcnt];
2506 ((W)forks [active - 1])->active = active;
2507 }
2508
2509 ev_stop (EV_A_ (W)w);
2510}
2511#endif
2512
2513#if EV_ASYNC_ENABLE
2514void
2515ev_async_start (EV_P_ ev_async *w)
2516{
2517 if (expect_false (ev_is_active (w)))
2518 return;
2519
2520 evpipe_init (EV_A);
2521
2522 ev_start (EV_A_ (W)w, ++asynccnt);
2523 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2524 asyncs [asynccnt - 1] = w;
2525}
2526
2527void
2528ev_async_stop (EV_P_ ev_async *w)
2529{
2530 clear_pending (EV_A_ (W)w);
2531 if (expect_false (!ev_is_active (w)))
2532 return;
2533
2534 {
2535 int active = ((W)w)->active;
2536 asyncs [active - 1] = asyncs [--asynccnt];
2537 ((W)asyncs [active - 1])->active = active;
2538 }
2539
2540 ev_stop (EV_A_ (W)w);
2541}
2542
2543void
2544ev_async_send (EV_P_ ev_async *w)
2545{
2546 w->sent = 1;
2547 evpipe_write (EV_A_ &gotasync);
2548}
2549#endif
883 2550
884/*****************************************************************************/ 2551/*****************************************************************************/
885 2552
886struct ev_once 2553struct ev_once
887{ 2554{
888 struct ev_io io; 2555 ev_io io;
889 struct ev_timer to; 2556 ev_timer to;
890 void (*cb)(int revents, void *arg); 2557 void (*cb)(int revents, void *arg);
891 void *arg; 2558 void *arg;
892}; 2559};
893 2560
894static void 2561static void
895once_cb (struct ev_once *once, int revents) 2562once_cb (EV_P_ struct ev_once *once, int revents)
896{ 2563{
897 void (*cb)(int revents, void *arg) = once->cb; 2564 void (*cb)(int revents, void *arg) = once->cb;
898 void *arg = once->arg; 2565 void *arg = once->arg;
899 2566
900 evio_stop (&once->io); 2567 ev_io_stop (EV_A_ &once->io);
901 evtimer_stop (&once->to); 2568 ev_timer_stop (EV_A_ &once->to);
902 free (once); 2569 ev_free (once);
903 2570
904 cb (revents, arg); 2571 cb (revents, arg);
905} 2572}
906 2573
907static void 2574static void
908once_cb_io (struct ev_io *w, int revents) 2575once_cb_io (EV_P_ ev_io *w, int revents)
909{ 2576{
910 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2577 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
911} 2578}
912 2579
913static void 2580static void
914once_cb_to (struct ev_timer *w, int revents) 2581once_cb_to (EV_P_ ev_timer *w, int revents)
915{ 2582{
916 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2583 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
917} 2584}
918 2585
919void 2586void
920ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2587ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
921{ 2588{
922 struct ev_once *once = malloc (sizeof (struct ev_once)); 2589 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
923 2590
924 if (!once) 2591 if (expect_false (!once))
925 cb (EV_ERROR, arg); 2592 {
926 else 2593 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
2594 return;
927 { 2595 }
2596
928 once->cb = cb; 2597 once->cb = cb;
929 once->arg = arg; 2598 once->arg = arg;
930 2599
931 evw_init (&once->io, once_cb_io); 2600 ev_init (&once->io, once_cb_io);
932
933 if (fd >= 0) 2601 if (fd >= 0)
934 { 2602 {
935 evio_set (&once->io, fd, events); 2603 ev_io_set (&once->io, fd, events);
936 evio_start (&once->io); 2604 ev_io_start (EV_A_ &once->io);
937 } 2605 }
938 2606
939 evw_init (&once->to, once_cb_to); 2607 ev_init (&once->to, once_cb_to);
940
941 if (timeout >= 0.) 2608 if (timeout >= 0.)
942 { 2609 {
943 evtimer_set (&once->to, timeout, 0.); 2610 ev_timer_set (&once->to, timeout, 0.);
944 evtimer_start (&once->to); 2611 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 { 2612 }
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} 2613}
1026 2614
2615#if EV_MULTIPLICITY
2616 #include "ev_wrap.h"
1027#endif 2617#endif
1028 2618
2619#ifdef __cplusplus
2620}
2621#endif
1029 2622
1030
1031

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