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Comparing libev/ev.c (file contents):
Revision 1.24 by root, Wed Oct 31 20:46:44 2007 UTC vs.
Revision 1.238 by root, Thu May 8 20:49:12 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/types.h> 143#include <sys/types.h>
42#include <sys/wait.h>
43#include <sys/time.h>
44#include <time.h> 144#include <time.h>
45 145
46#ifndef HAVE_MONOTONIC 146#include <signal.h>
47# ifdef CLOCK_MONOTONIC 147
48# 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
49# endif 163# endif
50#endif 164#endif
51 165
166/* this block tries to deduce configuration from header-defined symbols and defaults */
167
168#ifndef EV_USE_MONOTONIC
169# define EV_USE_MONOTONIC 0
170#endif
171
172#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0
174#endif
175
176#ifndef EV_USE_NANOSLEEP
177# define EV_USE_NANOSLEEP 0
178#endif
179
52#ifndef HAVE_SELECT 180#ifndef EV_USE_SELECT
53# define HAVE_SELECT 1 181# define EV_USE_SELECT 1
182#endif
183
184#ifndef EV_USE_POLL
185# ifdef _WIN32
186# define EV_USE_POLL 0
187# else
188# define EV_USE_POLL 1
54#endif 189# endif
190#endif
55 191
56#ifndef HAVE_EPOLL 192#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1
195# else
57# define HAVE_EPOLL 0 196# define EV_USE_EPOLL 0
58#endif 197# endif
198#endif
59 199
60#ifndef HAVE_REALTIME 200#ifndef EV_USE_KQUEUE
61# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ 201# define EV_USE_KQUEUE 0
202#endif
203
204#ifndef EV_USE_PORT
205# define EV_USE_PORT 0
206#endif
207
208#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1
211# else
212# define EV_USE_INOTIFY 0
62#endif 213# endif
214#endif
215
216#ifndef EV_PID_HASHSIZE
217# if EV_MINIMAL
218# define EV_PID_HASHSIZE 1
219# else
220# define EV_PID_HASHSIZE 16
221# endif
222#endif
223
224#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL
226# define EV_INOTIFY_HASHSIZE 1
227# else
228# define EV_INOTIFY_HASHSIZE 16
229# endif
230#endif
231
232#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1
235# else
236# define EV_USE_EVENTFD 0
237# endif
238#endif
239
240/* this block fixes any misconfiguration where we know we run into trouble otherwise */
241
242#ifndef CLOCK_MONOTONIC
243# undef EV_USE_MONOTONIC
244# define EV_USE_MONOTONIC 0
245#endif
246
247#ifndef CLOCK_REALTIME
248# undef EV_USE_REALTIME
249# define EV_USE_REALTIME 0
250#endif
251
252#if !EV_STAT_ENABLE
253# undef EV_USE_INOTIFY
254# define EV_USE_INOTIFY 0
255#endif
256
257#if !EV_USE_NANOSLEEP
258# ifndef _WIN32
259# include <sys/select.h>
260# endif
261#endif
262
263#if EV_USE_INOTIFY
264# include <sys/inotify.h>
265#endif
266
267#if EV_SELECT_IS_WINSOCKET
268# include <winsock.h>
269#endif
270
271#if EV_USE_EVENTFD
272/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
273# include <stdint.h>
274# ifdef __cplusplus
275extern "C" {
276# endif
277int eventfd (unsigned int initval, int flags);
278# ifdef __cplusplus
279}
280# endif
281#endif
282
283/**/
284
285/*
286 * This is used to avoid floating point rounding problems.
287 * It is added to ev_rt_now when scheduling periodics
288 * to ensure progress, time-wise, even when rounding
289 * errors are against us.
290 * This value is good at least till the year 4000.
291 * Better solutions welcome.
292 */
293#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
63 294
64#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 295#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65#define MAX_BLOCKTIME 60. 296#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
66#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */ 297/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
67 298
68#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
69 309
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
70typedef struct ev_watcher *W; 326typedef ev_watcher *W;
71typedef struct ev_watcher_list *WL; 327typedef ev_watcher_list *WL;
72typedef struct ev_watcher_time *WT; 328typedef ev_watcher_time *WT;
73 329
74static 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
75ev_tstamp ev_now; 450 ev_tstamp ev_rt_now;
76int ev_method; 451 #define VAR(name,decl) static decl;
452 #include "ev_vars.h"
453 #undef VAR
77 454
78static int have_monotonic; /* runtime */ 455 static int ev_default_loop_ptr;
79 456
80static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 457#endif
81static void (*method_modify)(int fd, int oev, int nev);
82static void (*method_poll)(ev_tstamp timeout);
83 458
84/*****************************************************************************/ 459/*****************************************************************************/
85 460
86ev_tstamp 461ev_tstamp
87ev_time (void) 462ev_time (void)
88{ 463{
89#if HAVE_REALTIME 464#if EV_USE_REALTIME
90 struct timespec ts; 465 struct timespec ts;
91 clock_gettime (CLOCK_REALTIME, &ts); 466 clock_gettime (CLOCK_REALTIME, &ts);
92 return ts.tv_sec + ts.tv_nsec * 1e-9; 467 return ts.tv_sec + ts.tv_nsec * 1e-9;
93#else 468#else
94 struct timeval tv; 469 struct timeval tv;
95 gettimeofday (&tv, 0); 470 gettimeofday (&tv, 0);
96 return tv.tv_sec + tv.tv_usec * 1e-6; 471 return tv.tv_sec + tv.tv_usec * 1e-6;
97#endif 472#endif
98} 473}
99 474
100static ev_tstamp 475ev_tstamp inline_size
101get_clock (void) 476get_clock (void)
102{ 477{
103#if HAVE_MONOTONIC 478#if EV_USE_MONOTONIC
104 if (have_monotonic) 479 if (expect_true (have_monotonic))
105 { 480 {
106 struct timespec ts; 481 struct timespec ts;
107 clock_gettime (CLOCK_MONOTONIC, &ts); 482 clock_gettime (CLOCK_MONOTONIC, &ts);
108 return ts.tv_sec + ts.tv_nsec * 1e-9; 483 return ts.tv_sec + ts.tv_nsec * 1e-9;
109 } 484 }
110#endif 485#endif
111 486
112 return ev_time (); 487 return ev_time ();
113} 488}
114 489
115#define array_needsize(base,cur,cnt,init) \ 490#if EV_MULTIPLICITY
116 if ((cnt) > cur) \ 491ev_tstamp
117 { \ 492ev_now (EV_P)
118 int newcnt = cur; \ 493{
119 do \ 494 return ev_rt_now;
120 { \ 495}
121 newcnt = (newcnt << 1) | 4 & ~3; \ 496#endif
122 } \ 497
123 while ((cnt) > newcnt); \ 498void
124 \ 499ev_sleep (ev_tstamp delay)
125 base = realloc (base, sizeof (*base) * (newcnt)); \ 500{
126 init (base + cur, newcnt - cur); \ 501 if (delay > 0.)
127 cur = newcnt; \
128 } 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}
129 522
130/*****************************************************************************/ 523/*****************************************************************************/
131 524
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#define USE_4HEAP 1/* they do not work corretcly */
772#if USE_4HEAP
773
774#define DHEAP 4
775#define HEAP0 (DHEAP - 1) /* index of first element in heap */
776
777/* towards the root */
778void inline_speed
779upheap (WT *heap, int k)
780{
781 WT w = heap [k];
782
783 for (;;)
784 {
785 int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
786
787 if (p == k || heap [p]->at <= w->at)
788 break;
789
790 heap [k] = heap [p];
791 ev_active (heap [k]) = k;
792 k = p;
793 }
794
795 heap [k] = w;
796 ev_active (heap [k]) = k;
797}
798
799/* away from the root */
800void inline_speed
801downheap (WT *heap, int N, int k)
802{
803 WT w = heap [k];
804 WT *E = heap + N + HEAP0;
805
806 for (;;)
807 {
808 ev_tstamp minat;
809 WT *minpos;
810 WT *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
811
812 // find minimum child
813 if (expect_true (pos + DHEAP - 1 < E))
814 {
815 /* fast path */
816 (minpos = pos + 0), (minat = (*minpos)->at);
817 if (pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
818 if (pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
819 if (pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
820 }
821 else
822 {
823 /* slow path */
824 if (pos >= E)
825 break;
826 (minpos = pos + 0), (minat = (*minpos)->at);
827 if (pos + 1 < E && pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
828 if (pos + 2 < E && pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
829 if (pos + 3 < E && pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
830 }
831
832 if (w->at <= minat)
833 break;
834
835 ev_active (*minpos) = k;
836 heap [k] = *minpos;
837
838 k = minpos - heap;
839 }
840
841 heap [k] = w;
842 ev_active (heap [k]) = k;
843}
844
845#else // 4HEAP
846
847#define HEAP0 1
848
849/* towards the root */
850void inline_speed
851upheap (WT *heap, int k)
852{
853 WT w = heap [k];
854
855 for (;;)
856 {
857 int p = k >> 1;
858
859 /* maybe we could use a dummy element at heap [0]? */
860 if (!p || heap [p]->at <= w->at)
861 break;
862
863 heap [k] = heap [p];
864 ev_active (heap [k]) = k;
865 k = p;
866 }
867
868 heap [k] = w;
869 ev_active (heap [k]) = k;
870}
871
872/* away from the root */
873void inline_speed
874downheap (WT *heap, int N, int k)
875{
876 WT w = heap [k];
877
878 for (;;)
879 {
880 int c = k << 1;
881
882 if (c > N)
883 break;
884
885 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
886 ? 1 : 0;
887
888 if (w->at <= heap [c]->at)
889 break;
890
891 heap [k] = heap [c];
892 ((W)heap [k])->active = k;
893
894 k = c;
895 }
896
897 heap [k] = w;
898 ev_active (heap [k]) = k;
899}
900#endif
901
902void inline_size
903adjustheap (WT *heap, int N, int k)
904{
905 upheap (heap, k);
906 downheap (heap, N, k);
907}
908
909/*****************************************************************************/
910
132typedef struct 911typedef struct
133{ 912{
134 struct ev_io *head; 913 WL head;
135 unsigned char wev, rev; /* want, received event set */ 914 EV_ATOMIC_T gotsig;
136} ANFD;
137
138static ANFD *anfds;
139static int anfdmax;
140
141static int *fdchanges;
142static int fdchangemax, fdchangecnt;
143
144static void
145anfds_init (ANFD *base, int count)
146{
147 while (count--)
148 {
149 base->head = 0;
150 base->wev = base->rev = EV_NONE;
151 ++base;
152 }
153}
154
155typedef struct
156{
157 W w;
158 int events;
159} ANPENDING;
160
161static ANPENDING *pendings;
162static int pendingmax, pendingcnt;
163
164static void
165event (W w, int events)
166{
167 if (w->active)
168 {
169 w->pending = ++pendingcnt;
170 array_needsize (pendings, pendingmax, pendingcnt, );
171 pendings [pendingcnt - 1].w = w;
172 pendings [pendingcnt - 1].events = events;
173 }
174}
175
176static void
177fd_event (int fd, int events)
178{
179 ANFD *anfd = anfds + fd;
180 struct ev_io *w;
181
182 for (w = anfd->head; w; w = w->next)
183 {
184 int ev = w->events & events;
185
186 if (ev)
187 event ((W)w, ev);
188 }
189}
190
191static void
192queue_events (W *events, int eventcnt, int type)
193{
194 int i;
195
196 for (i = 0; i < eventcnt; ++i)
197 event (events [i], type);
198}
199
200/* called on EBADF to verify fds */
201static void
202fd_recheck (void)
203{
204 int fd;
205
206 for (fd = 0; fd < anfdmax; ++fd)
207 if (anfds [fd].wev)
208 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
209 while (anfds [fd].head)
210 {
211 event ((W)anfds [fd].head, EV_ERROR);
212 evio_stop (anfds [fd].head);
213 }
214}
215
216/*****************************************************************************/
217
218static struct ev_timer **timers;
219static int timermax, timercnt;
220
221static struct ev_periodic **periodics;
222static int periodicmax, periodiccnt;
223
224static void
225upheap (WT *timers, int k)
226{
227 WT w = timers [k];
228
229 while (k && timers [k >> 1]->at > w->at)
230 {
231 timers [k] = timers [k >> 1];
232 timers [k]->active = k + 1;
233 k >>= 1;
234 }
235
236 timers [k] = w;
237 timers [k]->active = k + 1;
238
239}
240
241static void
242downheap (WT *timers, int N, int k)
243{
244 WT w = timers [k];
245
246 while (k < (N >> 1))
247 {
248 int j = k << 1;
249
250 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
251 ++j;
252
253 if (w->at <= timers [j]->at)
254 break;
255
256 timers [k] = timers [j];
257 timers [k]->active = k + 1;
258 k = j;
259 }
260
261 timers [k] = w;
262 timers [k]->active = k + 1;
263}
264
265/*****************************************************************************/
266
267typedef struct
268{
269 struct ev_signal *head;
270 sig_atomic_t gotsig;
271} ANSIG; 915} ANSIG;
272 916
273static ANSIG *signals; 917static ANSIG *signals;
274static int signalmax; 918static int signalmax;
275 919
276static int sigpipe [2]; 920static EV_ATOMIC_T gotsig;
277static sig_atomic_t gotsig;
278static struct ev_io sigev;
279 921
280static void 922void inline_size
281signals_init (ANSIG *base, int count) 923signals_init (ANSIG *base, int count)
282{ 924{
283 while (count--) 925 while (count--)
284 { 926 {
285 base->head = 0; 927 base->head = 0;
286 base->gotsig = 0; 928 base->gotsig = 0;
929
287 ++base; 930 ++base;
288 } 931 }
289} 932}
290 933
934/*****************************************************************************/
935
936void inline_speed
937fd_intern (int fd)
938{
939#ifdef _WIN32
940 int arg = 1;
941 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
942#else
943 fcntl (fd, F_SETFD, FD_CLOEXEC);
944 fcntl (fd, F_SETFL, O_NONBLOCK);
945#endif
946}
947
948static void noinline
949evpipe_init (EV_P)
950{
951 if (!ev_is_active (&pipeev))
952 {
953#if EV_USE_EVENTFD
954 if ((evfd = eventfd (0, 0)) >= 0)
955 {
956 evpipe [0] = -1;
957 fd_intern (evfd);
958 ev_io_set (&pipeev, evfd, EV_READ);
959 }
960 else
961#endif
962 {
963 while (pipe (evpipe))
964 syserr ("(libev) error creating signal/async pipe");
965
966 fd_intern (evpipe [0]);
967 fd_intern (evpipe [1]);
968 ev_io_set (&pipeev, evpipe [0], EV_READ);
969 }
970
971 ev_io_start (EV_A_ &pipeev);
972 ev_unref (EV_A); /* watcher should not keep loop alive */
973 }
974}
975
976void inline_size
977evpipe_write (EV_P_ EV_ATOMIC_T *flag)
978{
979 if (!*flag)
980 {
981 int old_errno = errno; /* save errno because write might clobber it */
982
983 *flag = 1;
984
985#if EV_USE_EVENTFD
986 if (evfd >= 0)
987 {
988 uint64_t counter = 1;
989 write (evfd, &counter, sizeof (uint64_t));
990 }
991 else
992#endif
993 write (evpipe [1], &old_errno, 1);
994
995 errno = old_errno;
996 }
997}
998
291static void 999static void
1000pipecb (EV_P_ ev_io *iow, int revents)
1001{
1002#if EV_USE_EVENTFD
1003 if (evfd >= 0)
1004 {
1005 uint64_t counter;
1006 read (evfd, &counter, sizeof (uint64_t));
1007 }
1008 else
1009#endif
1010 {
1011 char dummy;
1012 read (evpipe [0], &dummy, 1);
1013 }
1014
1015 if (gotsig && ev_is_default_loop (EV_A))
1016 {
1017 int signum;
1018 gotsig = 0;
1019
1020 for (signum = signalmax; signum--; )
1021 if (signals [signum].gotsig)
1022 ev_feed_signal_event (EV_A_ signum + 1);
1023 }
1024
1025#if EV_ASYNC_ENABLE
1026 if (gotasync)
1027 {
1028 int i;
1029 gotasync = 0;
1030
1031 for (i = asynccnt; i--; )
1032 if (asyncs [i]->sent)
1033 {
1034 asyncs [i]->sent = 0;
1035 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1036 }
1037 }
1038#endif
1039}
1040
1041/*****************************************************************************/
1042
1043static void
292sighandler (int signum) 1044ev_sighandler (int signum)
293{ 1045{
1046#if EV_MULTIPLICITY
1047 struct ev_loop *loop = &default_loop_struct;
1048#endif
1049
1050#if _WIN32
1051 signal (signum, ev_sighandler);
1052#endif
1053
294 signals [signum - 1].gotsig = 1; 1054 signals [signum - 1].gotsig = 1;
295 1055 evpipe_write (EV_A_ &gotsig);
296 if (!gotsig)
297 {
298 gotsig = 1;
299 write (sigpipe [1], &gotsig, 1);
300 }
301} 1056}
302 1057
303static void 1058void noinline
304sigcb (struct ev_io *iow, int revents) 1059ev_feed_signal_event (EV_P_ int signum)
305{ 1060{
306 struct ev_signal *w; 1061 WL w;
307 int sig;
308 1062
309 gotsig = 0; 1063#if EV_MULTIPLICITY
310 read (sigpipe [0], &revents, 1); 1064 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1065#endif
311 1066
312 for (sig = signalmax; sig--; ) 1067 --signum;
313 if (signals [sig].gotsig) 1068
314 { 1069 if (signum < 0 || signum >= signalmax)
1070 return;
1071
315 signals [sig].gotsig = 0; 1072 signals [signum].gotsig = 0;
316 1073
317 for (w = signals [sig].head; w; w = w->next) 1074 for (w = signals [signum].head; w; w = w->next)
318 event ((W)w, EV_SIGNAL); 1075 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
319 }
320}
321
322static void
323siginit (void)
324{
325 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
326 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
327
328 /* rather than sort out wether we really need nb, set it */
329 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
330 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
331
332 evio_set (&sigev, sigpipe [0], EV_READ);
333 evio_start (&sigev);
334} 1076}
335 1077
336/*****************************************************************************/ 1078/*****************************************************************************/
337 1079
338static struct ev_idle **idles; 1080static WL childs [EV_PID_HASHSIZE];
339static int idlemax, idlecnt;
340 1081
341static struct ev_prepare **prepares; 1082#ifndef _WIN32
342static int preparemax, preparecnt;
343 1083
344static struct ev_check **checks;
345static int checkmax, checkcnt;
346
347/*****************************************************************************/
348
349static struct ev_child *childs [PID_HASHSIZE];
350static struct ev_signal childev; 1084static ev_signal childev;
1085
1086#ifndef WIFCONTINUED
1087# define WIFCONTINUED(status) 0
1088#endif
1089
1090void inline_speed
1091child_reap (EV_P_ int chain, int pid, int status)
1092{
1093 ev_child *w;
1094 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1095
1096 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1097 {
1098 if ((w->pid == pid || !w->pid)
1099 && (!traced || (w->flags & 1)))
1100 {
1101 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1102 w->rpid = pid;
1103 w->rstatus = status;
1104 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1105 }
1106 }
1107}
351 1108
352#ifndef WCONTINUED 1109#ifndef WCONTINUED
353# define WCONTINUED 0 1110# define WCONTINUED 0
354#endif 1111#endif
355 1112
356static void 1113static void
357childcb (struct ev_signal *sw, int revents) 1114childcb (EV_P_ ev_signal *sw, int revents)
358{ 1115{
359 struct ev_child *w;
360 int pid, status; 1116 int pid, status;
361 1117
1118 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
362 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1119 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
363 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1120 if (!WCONTINUED
364 if (w->pid == pid || w->pid == -1) 1121 || errno != EINVAL
365 { 1122 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
366 w->status = status; 1123 return;
367 event ((W)w, EV_CHILD); 1124
368 } 1125 /* make sure we are called again until all children have been reaped */
1126 /* we need to do it this way so that the callback gets called before we continue */
1127 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1128
1129 child_reap (EV_A_ pid, pid, status);
1130 if (EV_PID_HASHSIZE > 1)
1131 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
369} 1132}
1133
1134#endif
370 1135
371/*****************************************************************************/ 1136/*****************************************************************************/
372 1137
1138#if EV_USE_PORT
1139# include "ev_port.c"
1140#endif
1141#if EV_USE_KQUEUE
1142# include "ev_kqueue.c"
1143#endif
373#if HAVE_EPOLL 1144#if EV_USE_EPOLL
374# include "ev_epoll.c" 1145# include "ev_epoll.c"
375#endif 1146#endif
1147#if EV_USE_POLL
1148# include "ev_poll.c"
1149#endif
376#if HAVE_SELECT 1150#if EV_USE_SELECT
377# include "ev_select.c" 1151# include "ev_select.c"
378#endif 1152#endif
379 1153
380int 1154int
381ev_version_major (void) 1155ev_version_major (void)
… …
387ev_version_minor (void) 1161ev_version_minor (void)
388{ 1162{
389 return EV_VERSION_MINOR; 1163 return EV_VERSION_MINOR;
390} 1164}
391 1165
392int ev_init (int flags) 1166/* return true if we are running with elevated privileges and should ignore env variables */
1167int inline_size
1168enable_secure (void)
393{ 1169{
394 if (!ev_method) 1170#ifdef _WIN32
1171 return 0;
1172#else
1173 return getuid () != geteuid ()
1174 || getgid () != getegid ();
1175#endif
1176}
1177
1178unsigned int
1179ev_supported_backends (void)
1180{
1181 unsigned int flags = 0;
1182
1183 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1184 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1185 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1186 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1187 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1188
1189 return flags;
1190}
1191
1192unsigned int
1193ev_recommended_backends (void)
1194{
1195 unsigned int flags = ev_supported_backends ();
1196
1197#ifndef __NetBSD__
1198 /* kqueue is borked on everything but netbsd apparently */
1199 /* it usually doesn't work correctly on anything but sockets and pipes */
1200 flags &= ~EVBACKEND_KQUEUE;
1201#endif
1202#ifdef __APPLE__
1203 // flags &= ~EVBACKEND_KQUEUE; for documentation
1204 flags &= ~EVBACKEND_POLL;
1205#endif
1206
1207 return flags;
1208}
1209
1210unsigned int
1211ev_embeddable_backends (void)
1212{
1213 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1214
1215 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1216 /* please fix it and tell me how to detect the fix */
1217 flags &= ~EVBACKEND_EPOLL;
1218
1219 return flags;
1220}
1221
1222unsigned int
1223ev_backend (EV_P)
1224{
1225 return backend;
1226}
1227
1228unsigned int
1229ev_loop_count (EV_P)
1230{
1231 return loop_count;
1232}
1233
1234void
1235ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1236{
1237 io_blocktime = interval;
1238}
1239
1240void
1241ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1242{
1243 timeout_blocktime = interval;
1244}
1245
1246static void noinline
1247loop_init (EV_P_ unsigned int flags)
1248{
1249 if (!backend)
395 { 1250 {
396#if HAVE_MONOTONIC 1251#if EV_USE_MONOTONIC
397 { 1252 {
398 struct timespec ts; 1253 struct timespec ts;
399 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1254 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
400 have_monotonic = 1; 1255 have_monotonic = 1;
401 } 1256 }
402#endif 1257#endif
403 1258
404 ev_now = ev_time (); 1259 ev_rt_now = ev_time ();
405 now = get_clock (); 1260 mn_now = get_clock ();
1261 now_floor = mn_now;
406 diff = ev_now - now; 1262 rtmn_diff = ev_rt_now - mn_now;
407 1263
408 if (pipe (sigpipe)) 1264 io_blocktime = 0.;
409 return 0; 1265 timeout_blocktime = 0.;
1266 backend = 0;
1267 backend_fd = -1;
1268 gotasync = 0;
1269#if EV_USE_INOTIFY
1270 fs_fd = -2;
1271#endif
410 1272
411 ev_method = EVMETHOD_NONE; 1273 /* pid check not overridable via env */
1274#ifndef _WIN32
1275 if (flags & EVFLAG_FORKCHECK)
1276 curpid = getpid ();
1277#endif
1278
1279 if (!(flags & EVFLAG_NOENV)
1280 && !enable_secure ()
1281 && getenv ("LIBEV_FLAGS"))
1282 flags = atoi (getenv ("LIBEV_FLAGS"));
1283
1284 if (!(flags & 0x0000ffffU))
1285 flags |= ev_recommended_backends ();
1286
1287#if EV_USE_PORT
1288 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1289#endif
1290#if EV_USE_KQUEUE
1291 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1292#endif
412#if HAVE_EPOLL 1293#if EV_USE_EPOLL
413 if (ev_method == EVMETHOD_NONE) epoll_init (flags); 1294 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
414#endif 1295#endif
1296#if EV_USE_POLL
1297 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1298#endif
415#if HAVE_SELECT 1299#if EV_USE_SELECT
416 if (ev_method == EVMETHOD_NONE) select_init (flags); 1300 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
417#endif 1301#endif
418 1302
419 if (ev_method) 1303 ev_init (&pipeev, pipecb);
1304 ev_set_priority (&pipeev, EV_MAXPRI);
1305 }
1306}
1307
1308static void noinline
1309loop_destroy (EV_P)
1310{
1311 int i;
1312
1313 if (ev_is_active (&pipeev))
1314 {
1315 ev_ref (EV_A); /* signal watcher */
1316 ev_io_stop (EV_A_ &pipeev);
1317
1318#if EV_USE_EVENTFD
1319 if (evfd >= 0)
1320 close (evfd);
1321#endif
1322
1323 if (evpipe [0] >= 0)
420 { 1324 {
421 evw_init (&sigev, sigcb); 1325 close (evpipe [0]);
422 siginit (); 1326 close (evpipe [1]);
423
424 evsignal_init (&childev, childcb, SIGCHLD);
425 evsignal_start (&childev);
426 } 1327 }
427 } 1328 }
428 1329
429 return ev_method; 1330#if EV_USE_INOTIFY
1331 if (fs_fd >= 0)
1332 close (fs_fd);
1333#endif
1334
1335 if (backend_fd >= 0)
1336 close (backend_fd);
1337
1338#if EV_USE_PORT
1339 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1340#endif
1341#if EV_USE_KQUEUE
1342 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1343#endif
1344#if EV_USE_EPOLL
1345 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1346#endif
1347#if EV_USE_POLL
1348 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1349#endif
1350#if EV_USE_SELECT
1351 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1352#endif
1353
1354 for (i = NUMPRI; i--; )
1355 {
1356 array_free (pending, [i]);
1357#if EV_IDLE_ENABLE
1358 array_free (idle, [i]);
1359#endif
1360 }
1361
1362 ev_free (anfds); anfdmax = 0;
1363
1364 /* have to use the microsoft-never-gets-it-right macro */
1365 array_free (fdchange, EMPTY);
1366 array_free (timer, EMPTY);
1367#if EV_PERIODIC_ENABLE
1368 array_free (periodic, EMPTY);
1369#endif
1370#if EV_FORK_ENABLE
1371 array_free (fork, EMPTY);
1372#endif
1373 array_free (prepare, EMPTY);
1374 array_free (check, EMPTY);
1375#if EV_ASYNC_ENABLE
1376 array_free (async, EMPTY);
1377#endif
1378
1379 backend = 0;
1380}
1381
1382#if EV_USE_INOTIFY
1383void inline_size infy_fork (EV_P);
1384#endif
1385
1386void inline_size
1387loop_fork (EV_P)
1388{
1389#if EV_USE_PORT
1390 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1391#endif
1392#if EV_USE_KQUEUE
1393 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1394#endif
1395#if EV_USE_EPOLL
1396 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1397#endif
1398#if EV_USE_INOTIFY
1399 infy_fork (EV_A);
1400#endif
1401
1402 if (ev_is_active (&pipeev))
1403 {
1404 /* this "locks" the handlers against writing to the pipe */
1405 /* while we modify the fd vars */
1406 gotsig = 1;
1407#if EV_ASYNC_ENABLE
1408 gotasync = 1;
1409#endif
1410
1411 ev_ref (EV_A);
1412 ev_io_stop (EV_A_ &pipeev);
1413
1414#if EV_USE_EVENTFD
1415 if (evfd >= 0)
1416 close (evfd);
1417#endif
1418
1419 if (evpipe [0] >= 0)
1420 {
1421 close (evpipe [0]);
1422 close (evpipe [1]);
1423 }
1424
1425 evpipe_init (EV_A);
1426 /* now iterate over everything, in case we missed something */
1427 pipecb (EV_A_ &pipeev, EV_READ);
1428 }
1429
1430 postfork = 0;
1431}
1432
1433#if EV_MULTIPLICITY
1434struct ev_loop *
1435ev_loop_new (unsigned int flags)
1436{
1437 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1438
1439 memset (loop, 0, sizeof (struct ev_loop));
1440
1441 loop_init (EV_A_ flags);
1442
1443 if (ev_backend (EV_A))
1444 return loop;
1445
1446 return 0;
1447}
1448
1449void
1450ev_loop_destroy (EV_P)
1451{
1452 loop_destroy (EV_A);
1453 ev_free (loop);
1454}
1455
1456void
1457ev_loop_fork (EV_P)
1458{
1459 postfork = 1; /* must be in line with ev_default_fork */
1460}
1461#endif
1462
1463#if EV_MULTIPLICITY
1464struct ev_loop *
1465ev_default_loop_init (unsigned int flags)
1466#else
1467int
1468ev_default_loop (unsigned int flags)
1469#endif
1470{
1471 if (!ev_default_loop_ptr)
1472 {
1473#if EV_MULTIPLICITY
1474 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1475#else
1476 ev_default_loop_ptr = 1;
1477#endif
1478
1479 loop_init (EV_A_ flags);
1480
1481 if (ev_backend (EV_A))
1482 {
1483#ifndef _WIN32
1484 ev_signal_init (&childev, childcb, SIGCHLD);
1485 ev_set_priority (&childev, EV_MAXPRI);
1486 ev_signal_start (EV_A_ &childev);
1487 ev_unref (EV_A); /* child watcher should not keep loop alive */
1488#endif
1489 }
1490 else
1491 ev_default_loop_ptr = 0;
1492 }
1493
1494 return ev_default_loop_ptr;
1495}
1496
1497void
1498ev_default_destroy (void)
1499{
1500#if EV_MULTIPLICITY
1501 struct ev_loop *loop = ev_default_loop_ptr;
1502#endif
1503
1504#ifndef _WIN32
1505 ev_ref (EV_A); /* child watcher */
1506 ev_signal_stop (EV_A_ &childev);
1507#endif
1508
1509 loop_destroy (EV_A);
1510}
1511
1512void
1513ev_default_fork (void)
1514{
1515#if EV_MULTIPLICITY
1516 struct ev_loop *loop = ev_default_loop_ptr;
1517#endif
1518
1519 if (backend)
1520 postfork = 1; /* must be in line with ev_loop_fork */
430} 1521}
431 1522
432/*****************************************************************************/ 1523/*****************************************************************************/
433 1524
434void 1525void
435ev_prefork (void) 1526ev_invoke (EV_P_ void *w, int revents)
436{ 1527{
437 /* nop */ 1528 EV_CB_INVOKE ((W)w, revents);
438} 1529}
439 1530
440void 1531void inline_speed
441ev_postfork_parent (void) 1532call_pending (EV_P)
442{ 1533{
443 /* nop */
444}
445
446void
447ev_postfork_child (void)
448{
449#if HAVE_EPOLL
450 if (ev_method == EVMETHOD_EPOLL)
451 epoll_postfork_child ();
452#endif
453
454 evio_stop (&sigev);
455 close (sigpipe [0]);
456 close (sigpipe [1]);
457 pipe (sigpipe);
458 siginit ();
459}
460
461/*****************************************************************************/
462
463static void
464fd_reify (void)
465{
466 int i; 1534 int pri;
467 1535
468 for (i = 0; i < fdchangecnt; ++i) 1536 for (pri = NUMPRI; pri--; )
1537 while (pendingcnt [pri])
469 { 1538 {
470 int fd = fdchanges [i]; 1539 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
471 ANFD *anfd = anfds + fd;
472 struct ev_io *w;
473 1540
474 int wev = 0; 1541 if (expect_true (p->w))
1542 {
1543 /*assert (("non-pending watcher on pending list", p->w->pending));*/
475 1544
476 for (w = anfd->head; w; w = w->next) 1545 p->w->pending = 0;
477 wev |= w->events; 1546 EV_CB_INVOKE (p->w, p->events);
1547 }
1548 }
1549}
478 1550
479 if (anfd->wev != wev) 1551#if EV_IDLE_ENABLE
1552void inline_size
1553idle_reify (EV_P)
1554{
1555 if (expect_false (idleall))
1556 {
1557 int pri;
1558
1559 for (pri = NUMPRI; pri--; )
480 { 1560 {
481 method_modify (fd, anfd->wev, wev); 1561 if (pendingcnt [pri])
482 anfd->wev = wev; 1562 break;
1563
1564 if (idlecnt [pri])
1565 {
1566 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1567 break;
1568 }
483 } 1569 }
484 } 1570 }
485
486 fdchangecnt = 0;
487} 1571}
1572#endif
488 1573
489static void 1574void inline_size
490call_pending (void)
491{
492 while (pendingcnt)
493 {
494 ANPENDING *p = pendings + --pendingcnt;
495
496 if (p->w)
497 {
498 p->w->pending = 0;
499 p->w->cb (p->w, p->events);
500 }
501 }
502}
503
504static void
505timers_reify (void) 1575timers_reify (EV_P)
506{ 1576{
507 while (timercnt && timers [0]->at <= now) 1577 while (timercnt && ev_at (timers [HEAP0]) <= mn_now)
508 { 1578 {
509 struct ev_timer *w = timers [0]; 1579 ev_timer *w = (ev_timer *)timers [HEAP0];
510 1580
511 event ((W)w, EV_TIMEOUT); 1581 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
512 1582
513 /* first reschedule or stop timer */ 1583 /* first reschedule or stop timer */
514 if (w->repeat) 1584 if (w->repeat)
515 { 1585 {
516 w->at = now + w->repeat; 1586 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
517 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1587
1588 ev_at (w) += w->repeat;
1589 if (ev_at (w) < mn_now)
1590 ev_at (w) = mn_now;
1591
518 downheap ((WT *)timers, timercnt, 0); 1592 downheap (timers, timercnt, HEAP0);
519 } 1593 }
520 else 1594 else
521 evtimer_stop (w); /* nonrepeating: stop timer */ 1595 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
522 }
523}
524 1596
525static void 1597 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1598 }
1599}
1600
1601#if EV_PERIODIC_ENABLE
1602void inline_size
526periodics_reify (void) 1603periodics_reify (EV_P)
527{ 1604{
528 while (periodiccnt && periodics [0]->at <= ev_now) 1605 while (periodiccnt && ev_at (periodics [HEAP0]) <= ev_rt_now)
529 { 1606 {
530 struct ev_periodic *w = periodics [0]; 1607 ev_periodic *w = (ev_periodic *)periodics [HEAP0];
1608
1609 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
531 1610
532 /* first reschedule or stop timer */ 1611 /* first reschedule or stop timer */
533 if (w->interval) 1612 if (w->reschedule_cb)
534 { 1613 {
535 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1614 ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
536 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1615 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
537 downheap ((WT *)periodics, periodiccnt, 0); 1616 downheap (periodics, periodiccnt, 1);
1617 }
1618 else if (w->interval)
1619 {
1620 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1621 if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
1622 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
1623 downheap (periodics, periodiccnt, HEAP0);
538 } 1624 }
539 else 1625 else
540 evperiodic_stop (w); /* nonrepeating: stop timer */ 1626 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
541 1627
542 event ((W)w, EV_TIMEOUT); 1628 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
543 } 1629 }
544} 1630}
545 1631
546static void 1632static void noinline
547periodics_reschedule (ev_tstamp diff) 1633periodics_reschedule (EV_P)
548{ 1634{
549 int i; 1635 int i;
550 1636
551 /* adjust periodics after time jump */ 1637 /* adjust periodics after time jump */
552 for (i = 0; i < periodiccnt; ++i) 1638 for (i = 1; i <= periodiccnt; ++i)
553 { 1639 {
554 struct ev_periodic *w = periodics [i]; 1640 ev_periodic *w = (ev_periodic *)periodics [i];
555 1641
1642 if (w->reschedule_cb)
1643 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
556 if (w->interval) 1644 else if (w->interval)
1645 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1646 }
1647
1648 /* now rebuild the heap */
1649 for (i = periodiccnt >> 1; --i; )
1650 downheap (periodics, periodiccnt, i + HEAP0);
1651}
1652#endif
1653
1654void inline_speed
1655time_update (EV_P_ ev_tstamp max_block)
1656{
1657 int i;
1658
1659#if EV_USE_MONOTONIC
1660 if (expect_true (have_monotonic))
1661 {
1662 ev_tstamp odiff = rtmn_diff;
1663
1664 mn_now = get_clock ();
1665
1666 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1667 /* interpolate in the meantime */
1668 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
557 { 1669 {
558 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1670 ev_rt_now = rtmn_diff + mn_now;
559 1671 return;
560 if (fabs (diff) >= 1e-4)
561 {
562 evperiodic_stop (w);
563 evperiodic_start (w);
564
565 i = 0; /* restart loop, inefficient, but time jumps should be rare */
566 }
567 } 1672 }
568 }
569}
570 1673
571static void 1674 now_floor = mn_now;
572time_update (void)
573{
574 int i;
575
576 ev_now = ev_time (); 1675 ev_rt_now = ev_time ();
577 1676
578 if (have_monotonic)
579 {
580 ev_tstamp odiff = diff;
581
582 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1677 /* loop a few times, before making important decisions.
1678 * on the choice of "4": one iteration isn't enough,
1679 * in case we get preempted during the calls to
1680 * ev_time and get_clock. a second call is almost guaranteed
1681 * to succeed in that case, though. and looping a few more times
1682 * doesn't hurt either as we only do this on time-jumps or
1683 * in the unlikely event of having been preempted here.
1684 */
1685 for (i = 4; --i; )
583 { 1686 {
584 now = get_clock ();
585 diff = ev_now - now; 1687 rtmn_diff = ev_rt_now - mn_now;
586 1688
587 if (fabs (odiff - diff) < MIN_TIMEJUMP) 1689 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
588 return; /* all is well */ 1690 return; /* all is well */
589 1691
590 ev_now = ev_time (); 1692 ev_rt_now = ev_time ();
1693 mn_now = get_clock ();
1694 now_floor = mn_now;
591 } 1695 }
592 1696
1697# if EV_PERIODIC_ENABLE
593 periodics_reschedule (diff - odiff); 1698 periodics_reschedule (EV_A);
1699# endif
594 /* no timer adjustment, as the monotonic clock doesn't jump */ 1700 /* no timer adjustment, as the monotonic clock doesn't jump */
1701 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
595 } 1702 }
596 else 1703 else
1704#endif
597 { 1705 {
598 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 1706 ev_rt_now = ev_time ();
1707
1708 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
599 { 1709 {
1710#if EV_PERIODIC_ENABLE
600 periodics_reschedule (ev_now - now); 1711 periodics_reschedule (EV_A);
601 1712#endif
602 /* adjust timers. this is easy, as the offset is the same for all */ 1713 /* adjust timers. this is easy, as the offset is the same for all of them */
603 for (i = 0; i < timercnt; ++i) 1714 for (i = 1; i <= timercnt; ++i)
604 timers [i]->at += diff; 1715 ev_at (timers [i]) += ev_rt_now - mn_now;
605 } 1716 }
606 1717
607 now = ev_now; 1718 mn_now = ev_rt_now;
608 } 1719 }
609} 1720}
610 1721
611int ev_loop_done; 1722void
1723ev_ref (EV_P)
1724{
1725 ++activecnt;
1726}
612 1727
1728void
1729ev_unref (EV_P)
1730{
1731 --activecnt;
1732}
1733
1734static int loop_done;
1735
1736void
613void ev_loop (int flags) 1737ev_loop (EV_P_ int flags)
614{ 1738{
615 double block; 1739 loop_done = EVUNLOOP_CANCEL;
616 ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0; 1740
1741 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
617 1742
618 do 1743 do
619 { 1744 {
1745#ifndef _WIN32
1746 if (expect_false (curpid)) /* penalise the forking check even more */
1747 if (expect_false (getpid () != curpid))
1748 {
1749 curpid = getpid ();
1750 postfork = 1;
1751 }
1752#endif
1753
1754#if EV_FORK_ENABLE
1755 /* we might have forked, so queue fork handlers */
1756 if (expect_false (postfork))
1757 if (forkcnt)
1758 {
1759 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1760 call_pending (EV_A);
1761 }
1762#endif
1763
620 /* queue check watchers (and execute them) */ 1764 /* queue prepare watchers (and execute them) */
621 if (preparecnt) 1765 if (expect_false (preparecnt))
622 { 1766 {
623 queue_events ((W *)prepares, preparecnt, EV_PREPARE); 1767 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
624 call_pending (); 1768 call_pending (EV_A);
625 } 1769 }
626 1770
1771 if (expect_false (!activecnt))
1772 break;
1773
1774 /* we might have forked, so reify kernel state if necessary */
1775 if (expect_false (postfork))
1776 loop_fork (EV_A);
1777
627 /* update fd-related kernel structures */ 1778 /* update fd-related kernel structures */
628 fd_reify (); 1779 fd_reify (EV_A);
629 1780
630 /* calculate blocking time */ 1781 /* calculate blocking time */
1782 {
1783 ev_tstamp waittime = 0.;
1784 ev_tstamp sleeptime = 0.;
631 1785
632 /* we only need this for !monotonic clockor timers, but as we basically 1786 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
633 always have timers, we just calculate it always */
634 ev_now = ev_time ();
635
636 if (flags & EVLOOP_NONBLOCK || idlecnt)
637 block = 0.;
638 else
639 { 1787 {
1788 /* update time to cancel out callback processing overhead */
1789 time_update (EV_A_ 1e100);
1790
640 block = MAX_BLOCKTIME; 1791 waittime = MAX_BLOCKTIME;
641 1792
642 if (timercnt) 1793 if (timercnt)
643 { 1794 {
644 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 1795 ev_tstamp to = ev_at (timers [HEAP0]) - mn_now + backend_fudge;
645 if (block > to) block = to; 1796 if (waittime > to) waittime = to;
646 } 1797 }
647 1798
1799#if EV_PERIODIC_ENABLE
648 if (periodiccnt) 1800 if (periodiccnt)
649 { 1801 {
650 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1802 ev_tstamp to = ev_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
651 if (block > to) block = to; 1803 if (waittime > to) waittime = to;
652 } 1804 }
1805#endif
653 1806
654 if (block < 0.) block = 0.; 1807 if (expect_false (waittime < timeout_blocktime))
1808 waittime = timeout_blocktime;
1809
1810 sleeptime = waittime - backend_fudge;
1811
1812 if (expect_true (sleeptime > io_blocktime))
1813 sleeptime = io_blocktime;
1814
1815 if (sleeptime)
1816 {
1817 ev_sleep (sleeptime);
1818 waittime -= sleeptime;
1819 }
655 } 1820 }
656 1821
657 method_poll (block); 1822 ++loop_count;
1823 backend_poll (EV_A_ waittime);
658 1824
659 /* update ev_now, do magic */ 1825 /* update ev_rt_now, do magic */
660 time_update (); 1826 time_update (EV_A_ waittime + sleeptime);
1827 }
661 1828
662 /* queue pending timers and reschedule them */ 1829 /* queue pending timers and reschedule them */
663 timers_reify (); /* relative timers called last */ 1830 timers_reify (EV_A); /* relative timers called last */
1831#if EV_PERIODIC_ENABLE
664 periodics_reify (); /* absolute timers called first */ 1832 periodics_reify (EV_A); /* absolute timers called first */
1833#endif
665 1834
1835#if EV_IDLE_ENABLE
666 /* queue idle watchers unless io or timers are pending */ 1836 /* queue idle watchers unless other events are pending */
667 if (!pendingcnt) 1837 idle_reify (EV_A);
668 queue_events ((W *)idles, idlecnt, EV_IDLE); 1838#endif
669 1839
670 /* queue check watchers, to be executed first */ 1840 /* queue check watchers, to be executed first */
671 if (checkcnt) 1841 if (expect_false (checkcnt))
672 queue_events ((W *)checks, checkcnt, EV_CHECK); 1842 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
673 1843
674 call_pending (); 1844 call_pending (EV_A);
675 } 1845 }
676 while (!ev_loop_done); 1846 while (expect_true (
1847 activecnt
1848 && !loop_done
1849 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1850 ));
677 1851
678 if (ev_loop_done != 2) 1852 if (loop_done == EVUNLOOP_ONE)
1853 loop_done = EVUNLOOP_CANCEL;
1854}
1855
1856void
1857ev_unloop (EV_P_ int how)
1858{
679 ev_loop_done = 0; 1859 loop_done = how;
680} 1860}
681 1861
682/*****************************************************************************/ 1862/*****************************************************************************/
683 1863
684static void 1864void inline_size
685wlist_add (WL *head, WL elem) 1865wlist_add (WL *head, WL elem)
686{ 1866{
687 elem->next = *head; 1867 elem->next = *head;
688 *head = elem; 1868 *head = elem;
689} 1869}
690 1870
691static void 1871void inline_size
692wlist_del (WL *head, WL elem) 1872wlist_del (WL *head, WL elem)
693{ 1873{
694 while (*head) 1874 while (*head)
695 { 1875 {
696 if (*head == elem) 1876 if (*head == elem)
… …
701 1881
702 head = &(*head)->next; 1882 head = &(*head)->next;
703 } 1883 }
704} 1884}
705 1885
706static void 1886void inline_speed
707ev_clear (W w) 1887clear_pending (EV_P_ W w)
708{ 1888{
709 if (w->pending) 1889 if (w->pending)
710 { 1890 {
711 pendings [w->pending - 1].w = 0; 1891 pendings [ABSPRI (w)][w->pending - 1].w = 0;
712 w->pending = 0; 1892 w->pending = 0;
713 } 1893 }
714} 1894}
715 1895
716static void 1896int
1897ev_clear_pending (EV_P_ void *w)
1898{
1899 W w_ = (W)w;
1900 int pending = w_->pending;
1901
1902 if (expect_true (pending))
1903 {
1904 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1905 w_->pending = 0;
1906 p->w = 0;
1907 return p->events;
1908 }
1909 else
1910 return 0;
1911}
1912
1913void inline_size
1914pri_adjust (EV_P_ W w)
1915{
1916 int pri = w->priority;
1917 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1918 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1919 w->priority = pri;
1920}
1921
1922void inline_speed
717ev_start (W w, int active) 1923ev_start (EV_P_ W w, int active)
718{ 1924{
1925 pri_adjust (EV_A_ w);
719 w->active = active; 1926 w->active = active;
1927 ev_ref (EV_A);
720} 1928}
721 1929
722static void 1930void inline_size
723ev_stop (W w) 1931ev_stop (EV_P_ W w)
724{ 1932{
1933 ev_unref (EV_A);
725 w->active = 0; 1934 w->active = 0;
726} 1935}
727 1936
728/*****************************************************************************/ 1937/*****************************************************************************/
729 1938
730void 1939void noinline
731evio_start (struct ev_io *w) 1940ev_io_start (EV_P_ ev_io *w)
732{ 1941{
1942 int fd = w->fd;
1943
733 if (ev_is_active (w)) 1944 if (expect_false (ev_is_active (w)))
734 return; 1945 return;
735 1946
736 int fd = w->fd; 1947 assert (("ev_io_start called with negative fd", fd >= 0));
737 1948
738 ev_start ((W)w, 1); 1949 ev_start (EV_A_ (W)w, 1);
739 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1950 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
740 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1951 wlist_add (&anfds[fd].head, (WL)w);
741 1952
742 ++fdchangecnt; 1953 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
743 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1954 w->events &= ~EV_IOFDSET;
744 fdchanges [fdchangecnt - 1] = fd;
745} 1955}
746 1956
747void 1957void noinline
748evio_stop (struct ev_io *w) 1958ev_io_stop (EV_P_ ev_io *w)
749{ 1959{
750 ev_clear ((W)w); 1960 clear_pending (EV_A_ (W)w);
751 if (!ev_is_active (w)) 1961 if (expect_false (!ev_is_active (w)))
752 return; 1962 return;
753 1963
1964 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1965
754 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1966 wlist_del (&anfds[w->fd].head, (WL)w);
755 ev_stop ((W)w); 1967 ev_stop (EV_A_ (W)w);
756 1968
757 ++fdchangecnt; 1969 fd_change (EV_A_ w->fd, 1);
758 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
759 fdchanges [fdchangecnt - 1] = w->fd;
760} 1970}
761 1971
762void 1972void noinline
763evtimer_start (struct ev_timer *w) 1973ev_timer_start (EV_P_ ev_timer *w)
764{ 1974{
765 if (ev_is_active (w)) 1975 if (expect_false (ev_is_active (w)))
766 return; 1976 return;
767 1977
768 w->at += now; 1978 ev_at (w) += mn_now;
769 1979
770 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 1980 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
771 1981
772 ev_start ((W)w, ++timercnt); 1982 ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
773 array_needsize (timers, timermax, timercnt, ); 1983 array_needsize (WT, timers, timermax, timercnt + HEAP0, EMPTY2);
774 timers [timercnt - 1] = w; 1984 timers [ev_active (w)] = (WT)w;
775 upheap ((WT *)timers, timercnt - 1); 1985 upheap (timers, ev_active (w));
776}
777 1986
778void 1987 /*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
1988}
1989
1990void noinline
779evtimer_stop (struct ev_timer *w) 1991ev_timer_stop (EV_P_ ev_timer *w)
780{ 1992{
781 ev_clear ((W)w); 1993 clear_pending (EV_A_ (W)w);
782 if (!ev_is_active (w)) 1994 if (expect_false (!ev_is_active (w)))
783 return; 1995 return;
784 1996
785 if (w->active < timercnt--) 1997 {
1998 int active = ev_active (w);
1999
2000 assert (("internal timer heap corruption", timers [active] == (WT)w));
2001
2002 if (expect_true (active < timercnt + HEAP0 - 1))
786 { 2003 {
787 timers [w->active - 1] = timers [timercnt]; 2004 timers [active] = timers [timercnt + HEAP0 - 1];
788 downheap ((WT *)timers, timercnt, w->active - 1); 2005 adjustheap (timers, timercnt, active);
789 } 2006 }
790 2007
791 w->at = w->repeat; 2008 --timercnt;
2009 }
792 2010
2011 ev_at (w) -= mn_now;
2012
793 ev_stop ((W)w); 2013 ev_stop (EV_A_ (W)w);
794} 2014}
795 2015
796void 2016void noinline
797evtimer_again (struct ev_timer *w) 2017ev_timer_again (EV_P_ ev_timer *w)
798{ 2018{
799 if (ev_is_active (w)) 2019 if (ev_is_active (w))
800 { 2020 {
801 if (w->repeat) 2021 if (w->repeat)
802 { 2022 {
803 w->at = now + w->repeat; 2023 ev_at (w) = mn_now + w->repeat;
804 downheap ((WT *)timers, timercnt, w->active - 1); 2024 adjustheap (timers, timercnt, ev_active (w));
805 } 2025 }
806 else 2026 else
807 evtimer_stop (w); 2027 ev_timer_stop (EV_A_ w);
808 } 2028 }
809 else if (w->repeat) 2029 else if (w->repeat)
2030 {
2031 ev_at (w) = w->repeat;
810 evtimer_start (w); 2032 ev_timer_start (EV_A_ w);
2033 }
811} 2034}
812 2035
813void 2036#if EV_PERIODIC_ENABLE
2037void noinline
814evperiodic_start (struct ev_periodic *w) 2038ev_periodic_start (EV_P_ ev_periodic *w)
815{ 2039{
816 if (ev_is_active (w)) 2040 if (expect_false (ev_is_active (w)))
817 return; 2041 return;
818 2042
819 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 2043 if (w->reschedule_cb)
820 2044 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2045 else if (w->interval)
2046 {
2047 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
821 /* this formula differs from the one in periodic_reify because we do not always round up */ 2048 /* this formula differs from the one in periodic_reify because we do not always round up */
822 if (w->interval)
823 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 2049 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2050 }
2051 else
2052 ev_at (w) = w->offset;
824 2053
825 ev_start ((W)w, ++periodiccnt); 2054 ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
826 array_needsize (periodics, periodicmax, periodiccnt, ); 2055 array_needsize (WT, periodics, periodicmax, periodiccnt + HEAP0, EMPTY2);
827 periodics [periodiccnt - 1] = w; 2056 periodics [ev_active (w)] = (WT)w;
828 upheap ((WT *)periodics, periodiccnt - 1); 2057 upheap (periodics, ev_active (w));
829}
830 2058
831void 2059 /*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
2060}
2061
2062void noinline
832evperiodic_stop (struct ev_periodic *w) 2063ev_periodic_stop (EV_P_ ev_periodic *w)
833{ 2064{
834 ev_clear ((W)w); 2065 clear_pending (EV_A_ (W)w);
835 if (!ev_is_active (w)) 2066 if (expect_false (!ev_is_active (w)))
836 return; 2067 return;
837 2068
838 if (w->active < periodiccnt--) 2069 {
2070 int active = ev_active (w);
2071
2072 assert (("internal periodic heap corruption", periodics [active] == (WT)w));
2073
2074 if (expect_true (active < periodiccnt + HEAP0 - 1))
839 { 2075 {
840 periodics [w->active - 1] = periodics [periodiccnt]; 2076 periodics [active] = periodics [periodiccnt + HEAP0 - 1];
841 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2077 adjustheap (periodics, periodiccnt, active);
842 } 2078 }
843 2079
2080 --periodiccnt;
2081 }
2082
844 ev_stop ((W)w); 2083 ev_stop (EV_A_ (W)w);
845} 2084}
846 2085
847void 2086void noinline
2087ev_periodic_again (EV_P_ ev_periodic *w)
2088{
2089 /* TODO: use adjustheap and recalculation */
2090 ev_periodic_stop (EV_A_ w);
2091 ev_periodic_start (EV_A_ w);
2092}
2093#endif
2094
2095#ifndef SA_RESTART
2096# define SA_RESTART 0
2097#endif
2098
2099void noinline
848evsignal_start (struct ev_signal *w) 2100ev_signal_start (EV_P_ ev_signal *w)
849{ 2101{
2102#if EV_MULTIPLICITY
2103 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2104#endif
850 if (ev_is_active (w)) 2105 if (expect_false (ev_is_active (w)))
851 return; 2106 return;
852 2107
853 ev_start ((W)w, 1); 2108 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2109
2110 evpipe_init (EV_A);
2111
2112 {
2113#ifndef _WIN32
2114 sigset_t full, prev;
2115 sigfillset (&full);
2116 sigprocmask (SIG_SETMASK, &full, &prev);
2117#endif
2118
854 array_needsize (signals, signalmax, w->signum, signals_init); 2119 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2120
2121#ifndef _WIN32
2122 sigprocmask (SIG_SETMASK, &prev, 0);
2123#endif
2124 }
2125
2126 ev_start (EV_A_ (W)w, 1);
855 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2127 wlist_add (&signals [w->signum - 1].head, (WL)w);
856 2128
857 if (!w->next) 2129 if (!((WL)w)->next)
858 { 2130 {
2131#if _WIN32
2132 signal (w->signum, ev_sighandler);
2133#else
859 struct sigaction sa; 2134 struct sigaction sa;
860 sa.sa_handler = sighandler; 2135 sa.sa_handler = ev_sighandler;
861 sigfillset (&sa.sa_mask); 2136 sigfillset (&sa.sa_mask);
862 sa.sa_flags = 0; 2137 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
863 sigaction (w->signum, &sa, 0); 2138 sigaction (w->signum, &sa, 0);
2139#endif
864 } 2140 }
865} 2141}
866 2142
867void 2143void noinline
868evsignal_stop (struct ev_signal *w) 2144ev_signal_stop (EV_P_ ev_signal *w)
869{ 2145{
870 ev_clear ((W)w); 2146 clear_pending (EV_A_ (W)w);
871 if (!ev_is_active (w)) 2147 if (expect_false (!ev_is_active (w)))
872 return; 2148 return;
873 2149
874 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2150 wlist_del (&signals [w->signum - 1].head, (WL)w);
875 ev_stop ((W)w); 2151 ev_stop (EV_A_ (W)w);
876 2152
877 if (!signals [w->signum - 1].head) 2153 if (!signals [w->signum - 1].head)
878 signal (w->signum, SIG_DFL); 2154 signal (w->signum, SIG_DFL);
879} 2155}
880 2156
881void evidle_start (struct ev_idle *w) 2157void
2158ev_child_start (EV_P_ ev_child *w)
882{ 2159{
2160#if EV_MULTIPLICITY
2161 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2162#endif
883 if (ev_is_active (w)) 2163 if (expect_false (ev_is_active (w)))
884 return; 2164 return;
885 2165
886 ev_start ((W)w, ++idlecnt); 2166 ev_start (EV_A_ (W)w, 1);
887 array_needsize (idles, idlemax, idlecnt, ); 2167 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
888 idles [idlecnt - 1] = w;
889} 2168}
890 2169
891void evidle_stop (struct ev_idle *w) 2170void
2171ev_child_stop (EV_P_ ev_child *w)
892{ 2172{
893 ev_clear ((W)w); 2173 clear_pending (EV_A_ (W)w);
894 if (ev_is_active (w)) 2174 if (expect_false (!ev_is_active (w)))
895 return; 2175 return;
896 2176
897 idles [w->active - 1] = idles [--idlecnt]; 2177 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
898 ev_stop ((W)w); 2178 ev_stop (EV_A_ (W)w);
899} 2179}
900 2180
901void evprepare_start (struct ev_prepare *w) 2181#if EV_STAT_ENABLE
2182
2183# ifdef _WIN32
2184# undef lstat
2185# define lstat(a,b) _stati64 (a,b)
2186# endif
2187
2188#define DEF_STAT_INTERVAL 5.0074891
2189#define MIN_STAT_INTERVAL 0.1074891
2190
2191static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2192
2193#if EV_USE_INOTIFY
2194# define EV_INOTIFY_BUFSIZE 8192
2195
2196static void noinline
2197infy_add (EV_P_ ev_stat *w)
902{ 2198{
903 if (ev_is_active (w)) 2199 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);
2200
2201 if (w->wd < 0)
2202 {
2203 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2204
2205 /* monitor some parent directory for speedup hints */
2206 /* note that exceeding the hardcoded limit is not a correctness issue, */
2207 /* but an efficiency issue only */
2208 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2209 {
2210 char path [4096];
2211 strcpy (path, w->path);
2212
2213 do
2214 {
2215 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2216 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2217
2218 char *pend = strrchr (path, '/');
2219
2220 if (!pend)
2221 break; /* whoops, no '/', complain to your admin */
2222
2223 *pend = 0;
2224 w->wd = inotify_add_watch (fs_fd, path, mask);
2225 }
2226 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2227 }
2228 }
2229 else
2230 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2231
2232 if (w->wd >= 0)
2233 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2234}
2235
2236static void noinline
2237infy_del (EV_P_ ev_stat *w)
2238{
2239 int slot;
2240 int wd = w->wd;
2241
2242 if (wd < 0)
904 return; 2243 return;
905 2244
2245 w->wd = -2;
2246 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2247 wlist_del (&fs_hash [slot].head, (WL)w);
2248
2249 /* remove this watcher, if others are watching it, they will rearm */
2250 inotify_rm_watch (fs_fd, wd);
2251}
2252
2253static void noinline
2254infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2255{
2256 if (slot < 0)
2257 /* overflow, need to check for all hahs slots */
2258 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2259 infy_wd (EV_A_ slot, wd, ev);
2260 else
2261 {
2262 WL w_;
2263
2264 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2265 {
2266 ev_stat *w = (ev_stat *)w_;
2267 w_ = w_->next; /* lets us remove this watcher and all before it */
2268
2269 if (w->wd == wd || wd == -1)
2270 {
2271 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2272 {
2273 w->wd = -1;
2274 infy_add (EV_A_ w); /* re-add, no matter what */
2275 }
2276
2277 stat_timer_cb (EV_A_ &w->timer, 0);
2278 }
2279 }
2280 }
2281}
2282
2283static void
2284infy_cb (EV_P_ ev_io *w, int revents)
2285{
2286 char buf [EV_INOTIFY_BUFSIZE];
2287 struct inotify_event *ev = (struct inotify_event *)buf;
2288 int ofs;
2289 int len = read (fs_fd, buf, sizeof (buf));
2290
2291 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2292 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2293}
2294
2295void inline_size
2296infy_init (EV_P)
2297{
2298 if (fs_fd != -2)
2299 return;
2300
2301 fs_fd = inotify_init ();
2302
2303 if (fs_fd >= 0)
2304 {
2305 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2306 ev_set_priority (&fs_w, EV_MAXPRI);
2307 ev_io_start (EV_A_ &fs_w);
2308 }
2309}
2310
2311void inline_size
2312infy_fork (EV_P)
2313{
2314 int slot;
2315
2316 if (fs_fd < 0)
2317 return;
2318
2319 close (fs_fd);
2320 fs_fd = inotify_init ();
2321
2322 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2323 {
2324 WL w_ = fs_hash [slot].head;
2325 fs_hash [slot].head = 0;
2326
2327 while (w_)
2328 {
2329 ev_stat *w = (ev_stat *)w_;
2330 w_ = w_->next; /* lets us add this watcher */
2331
2332 w->wd = -1;
2333
2334 if (fs_fd >= 0)
2335 infy_add (EV_A_ w); /* re-add, no matter what */
2336 else
2337 ev_timer_start (EV_A_ &w->timer);
2338 }
2339
2340 }
2341}
2342
2343#endif
2344
2345void
2346ev_stat_stat (EV_P_ ev_stat *w)
2347{
2348 if (lstat (w->path, &w->attr) < 0)
2349 w->attr.st_nlink = 0;
2350 else if (!w->attr.st_nlink)
2351 w->attr.st_nlink = 1;
2352}
2353
2354static void noinline
2355stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2356{
2357 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2358
2359 /* we copy this here each the time so that */
2360 /* prev has the old value when the callback gets invoked */
2361 w->prev = w->attr;
2362 ev_stat_stat (EV_A_ w);
2363
2364 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2365 if (
2366 w->prev.st_dev != w->attr.st_dev
2367 || w->prev.st_ino != w->attr.st_ino
2368 || w->prev.st_mode != w->attr.st_mode
2369 || w->prev.st_nlink != w->attr.st_nlink
2370 || w->prev.st_uid != w->attr.st_uid
2371 || w->prev.st_gid != w->attr.st_gid
2372 || w->prev.st_rdev != w->attr.st_rdev
2373 || w->prev.st_size != w->attr.st_size
2374 || w->prev.st_atime != w->attr.st_atime
2375 || w->prev.st_mtime != w->attr.st_mtime
2376 || w->prev.st_ctime != w->attr.st_ctime
2377 ) {
2378 #if EV_USE_INOTIFY
2379 infy_del (EV_A_ w);
2380 infy_add (EV_A_ w);
2381 ev_stat_stat (EV_A_ w); /* avoid race... */
2382 #endif
2383
2384 ev_feed_event (EV_A_ w, EV_STAT);
2385 }
2386}
2387
2388void
2389ev_stat_start (EV_P_ ev_stat *w)
2390{
2391 if (expect_false (ev_is_active (w)))
2392 return;
2393
2394 /* since we use memcmp, we need to clear any padding data etc. */
2395 memset (&w->prev, 0, sizeof (ev_statdata));
2396 memset (&w->attr, 0, sizeof (ev_statdata));
2397
2398 ev_stat_stat (EV_A_ w);
2399
2400 if (w->interval < MIN_STAT_INTERVAL)
2401 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2402
2403 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2404 ev_set_priority (&w->timer, ev_priority (w));
2405
2406#if EV_USE_INOTIFY
2407 infy_init (EV_A);
2408
2409 if (fs_fd >= 0)
2410 infy_add (EV_A_ w);
2411 else
2412#endif
2413 ev_timer_start (EV_A_ &w->timer);
2414
2415 ev_start (EV_A_ (W)w, 1);
2416}
2417
2418void
2419ev_stat_stop (EV_P_ ev_stat *w)
2420{
2421 clear_pending (EV_A_ (W)w);
2422 if (expect_false (!ev_is_active (w)))
2423 return;
2424
2425#if EV_USE_INOTIFY
2426 infy_del (EV_A_ w);
2427#endif
2428 ev_timer_stop (EV_A_ &w->timer);
2429
2430 ev_stop (EV_A_ (W)w);
2431}
2432#endif
2433
2434#if EV_IDLE_ENABLE
2435void
2436ev_idle_start (EV_P_ ev_idle *w)
2437{
2438 if (expect_false (ev_is_active (w)))
2439 return;
2440
2441 pri_adjust (EV_A_ (W)w);
2442
2443 {
2444 int active = ++idlecnt [ABSPRI (w)];
2445
2446 ++idleall;
2447 ev_start (EV_A_ (W)w, active);
2448
2449 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2450 idles [ABSPRI (w)][active - 1] = w;
2451 }
2452}
2453
2454void
2455ev_idle_stop (EV_P_ ev_idle *w)
2456{
2457 clear_pending (EV_A_ (W)w);
2458 if (expect_false (!ev_is_active (w)))
2459 return;
2460
2461 {
2462 int active = ev_active (w);
2463
2464 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2465 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2466
2467 ev_stop (EV_A_ (W)w);
2468 --idleall;
2469 }
2470}
2471#endif
2472
2473void
2474ev_prepare_start (EV_P_ ev_prepare *w)
2475{
2476 if (expect_false (ev_is_active (w)))
2477 return;
2478
906 ev_start ((W)w, ++preparecnt); 2479 ev_start (EV_A_ (W)w, ++preparecnt);
907 array_needsize (prepares, preparemax, preparecnt, ); 2480 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
908 prepares [preparecnt - 1] = w; 2481 prepares [preparecnt - 1] = w;
909} 2482}
910 2483
2484void
911void evprepare_stop (struct ev_prepare *w) 2485ev_prepare_stop (EV_P_ ev_prepare *w)
912{ 2486{
913 ev_clear ((W)w); 2487 clear_pending (EV_A_ (W)w);
914 if (ev_is_active (w)) 2488 if (expect_false (!ev_is_active (w)))
915 return; 2489 return;
916 2490
2491 {
2492 int active = ev_active (w);
2493
917 prepares [w->active - 1] = prepares [--preparecnt]; 2494 prepares [active - 1] = prepares [--preparecnt];
2495 ev_active (prepares [active - 1]) = active;
2496 }
2497
918 ev_stop ((W)w); 2498 ev_stop (EV_A_ (W)w);
919} 2499}
920 2500
2501void
921void evcheck_start (struct ev_check *w) 2502ev_check_start (EV_P_ ev_check *w)
922{ 2503{
923 if (ev_is_active (w)) 2504 if (expect_false (ev_is_active (w)))
924 return; 2505 return;
925 2506
926 ev_start ((W)w, ++checkcnt); 2507 ev_start (EV_A_ (W)w, ++checkcnt);
927 array_needsize (checks, checkmax, checkcnt, ); 2508 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
928 checks [checkcnt - 1] = w; 2509 checks [checkcnt - 1] = w;
929} 2510}
930 2511
2512void
931void evcheck_stop (struct ev_check *w) 2513ev_check_stop (EV_P_ ev_check *w)
932{ 2514{
933 ev_clear ((W)w); 2515 clear_pending (EV_A_ (W)w);
934 if (ev_is_active (w)) 2516 if (expect_false (!ev_is_active (w)))
935 return; 2517 return;
936 2518
2519 {
2520 int active = ev_active (w);
2521
937 checks [w->active - 1] = checks [--checkcnt]; 2522 checks [active - 1] = checks [--checkcnt];
2523 ev_active (checks [active - 1]) = active;
2524 }
2525
938 ev_stop ((W)w); 2526 ev_stop (EV_A_ (W)w);
939} 2527}
940 2528
941void evchild_start (struct ev_child *w) 2529#if EV_EMBED_ENABLE
2530void noinline
2531ev_embed_sweep (EV_P_ ev_embed *w)
942{ 2532{
2533 ev_loop (w->other, EVLOOP_NONBLOCK);
2534}
2535
2536static void
2537embed_io_cb (EV_P_ ev_io *io, int revents)
2538{
2539 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2540
943 if (ev_is_active (w)) 2541 if (ev_cb (w))
2542 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2543 else
2544 ev_loop (w->other, EVLOOP_NONBLOCK);
2545}
2546
2547static void
2548embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2549{
2550 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2551
2552 {
2553 struct ev_loop *loop = w->other;
2554
2555 while (fdchangecnt)
2556 {
2557 fd_reify (EV_A);
2558 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2559 }
2560 }
2561}
2562
2563#if 0
2564static void
2565embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2566{
2567 ev_idle_stop (EV_A_ idle);
2568}
2569#endif
2570
2571void
2572ev_embed_start (EV_P_ ev_embed *w)
2573{
2574 if (expect_false (ev_is_active (w)))
944 return; 2575 return;
945 2576
2577 {
2578 struct ev_loop *loop = w->other;
2579 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2580 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2581 }
2582
2583 ev_set_priority (&w->io, ev_priority (w));
2584 ev_io_start (EV_A_ &w->io);
2585
2586 ev_prepare_init (&w->prepare, embed_prepare_cb);
2587 ev_set_priority (&w->prepare, EV_MINPRI);
2588 ev_prepare_start (EV_A_ &w->prepare);
2589
2590 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2591
946 ev_start ((W)w, 1); 2592 ev_start (EV_A_ (W)w, 1);
947 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
948} 2593}
949 2594
950void evchild_stop (struct ev_child *w) 2595void
2596ev_embed_stop (EV_P_ ev_embed *w)
951{ 2597{
952 ev_clear ((W)w); 2598 clear_pending (EV_A_ (W)w);
953 if (ev_is_active (w)) 2599 if (expect_false (!ev_is_active (w)))
954 return; 2600 return;
955 2601
956 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2602 ev_io_stop (EV_A_ &w->io);
2603 ev_prepare_stop (EV_A_ &w->prepare);
2604
957 ev_stop ((W)w); 2605 ev_stop (EV_A_ (W)w);
958} 2606}
2607#endif
2608
2609#if EV_FORK_ENABLE
2610void
2611ev_fork_start (EV_P_ ev_fork *w)
2612{
2613 if (expect_false (ev_is_active (w)))
2614 return;
2615
2616 ev_start (EV_A_ (W)w, ++forkcnt);
2617 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2618 forks [forkcnt - 1] = w;
2619}
2620
2621void
2622ev_fork_stop (EV_P_ ev_fork *w)
2623{
2624 clear_pending (EV_A_ (W)w);
2625 if (expect_false (!ev_is_active (w)))
2626 return;
2627
2628 {
2629 int active = ev_active (w);
2630
2631 forks [active - 1] = forks [--forkcnt];
2632 ev_active (forks [active - 1]) = active;
2633 }
2634
2635 ev_stop (EV_A_ (W)w);
2636}
2637#endif
2638
2639#if EV_ASYNC_ENABLE
2640void
2641ev_async_start (EV_P_ ev_async *w)
2642{
2643 if (expect_false (ev_is_active (w)))
2644 return;
2645
2646 evpipe_init (EV_A);
2647
2648 ev_start (EV_A_ (W)w, ++asynccnt);
2649 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2650 asyncs [asynccnt - 1] = w;
2651}
2652
2653void
2654ev_async_stop (EV_P_ ev_async *w)
2655{
2656 clear_pending (EV_A_ (W)w);
2657 if (expect_false (!ev_is_active (w)))
2658 return;
2659
2660 {
2661 int active = ev_active (w);
2662
2663 asyncs [active - 1] = asyncs [--asynccnt];
2664 ev_active (asyncs [active - 1]) = active;
2665 }
2666
2667 ev_stop (EV_A_ (W)w);
2668}
2669
2670void
2671ev_async_send (EV_P_ ev_async *w)
2672{
2673 w->sent = 1;
2674 evpipe_write (EV_A_ &gotasync);
2675}
2676#endif
959 2677
960/*****************************************************************************/ 2678/*****************************************************************************/
961 2679
962struct ev_once 2680struct ev_once
963{ 2681{
964 struct ev_io io; 2682 ev_io io;
965 struct ev_timer to; 2683 ev_timer to;
966 void (*cb)(int revents, void *arg); 2684 void (*cb)(int revents, void *arg);
967 void *arg; 2685 void *arg;
968}; 2686};
969 2687
970static void 2688static void
971once_cb (struct ev_once *once, int revents) 2689once_cb (EV_P_ struct ev_once *once, int revents)
972{ 2690{
973 void (*cb)(int revents, void *arg) = once->cb; 2691 void (*cb)(int revents, void *arg) = once->cb;
974 void *arg = once->arg; 2692 void *arg = once->arg;
975 2693
976 evio_stop (&once->io); 2694 ev_io_stop (EV_A_ &once->io);
977 evtimer_stop (&once->to); 2695 ev_timer_stop (EV_A_ &once->to);
978 free (once); 2696 ev_free (once);
979 2697
980 cb (revents, arg); 2698 cb (revents, arg);
981} 2699}
982 2700
983static void 2701static void
984once_cb_io (struct ev_io *w, int revents) 2702once_cb_io (EV_P_ ev_io *w, int revents)
985{ 2703{
986 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2704 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
987} 2705}
988 2706
989static void 2707static void
990once_cb_to (struct ev_timer *w, int revents) 2708once_cb_to (EV_P_ ev_timer *w, int revents)
991{ 2709{
992 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2710 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
993} 2711}
994 2712
995void 2713void
996ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2714ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
997{ 2715{
998 struct ev_once *once = malloc (sizeof (struct ev_once)); 2716 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
999 2717
1000 if (!once) 2718 if (expect_false (!once))
1001 cb (EV_ERROR, arg); 2719 {
1002 else 2720 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
2721 return;
1003 { 2722 }
2723
1004 once->cb = cb; 2724 once->cb = cb;
1005 once->arg = arg; 2725 once->arg = arg;
1006 2726
1007 evw_init (&once->io, once_cb_io); 2727 ev_init (&once->io, once_cb_io);
1008
1009 if (fd >= 0) 2728 if (fd >= 0)
1010 { 2729 {
1011 evio_set (&once->io, fd, events); 2730 ev_io_set (&once->io, fd, events);
1012 evio_start (&once->io); 2731 ev_io_start (EV_A_ &once->io);
1013 } 2732 }
1014 2733
1015 evw_init (&once->to, once_cb_to); 2734 ev_init (&once->to, once_cb_to);
1016
1017 if (timeout >= 0.) 2735 if (timeout >= 0.)
1018 { 2736 {
1019 evtimer_set (&once->to, timeout, 0.); 2737 ev_timer_set (&once->to, timeout, 0.);
1020 evtimer_start (&once->to); 2738 ev_timer_start (EV_A_ &once->to);
1021 }
1022 }
1023}
1024
1025/*****************************************************************************/
1026
1027#if 0
1028
1029struct ev_io wio;
1030
1031static void
1032sin_cb (struct ev_io *w, int revents)
1033{
1034 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1035}
1036
1037static void
1038ocb (struct ev_timer *w, int revents)
1039{
1040 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1041 evtimer_stop (w);
1042 evtimer_start (w);
1043}
1044
1045static void
1046scb (struct ev_signal *w, int revents)
1047{
1048 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1049 evio_stop (&wio);
1050 evio_start (&wio);
1051}
1052
1053static void
1054gcb (struct ev_signal *w, int revents)
1055{
1056 fprintf (stderr, "generic %x\n", revents);
1057
1058}
1059
1060int main (void)
1061{
1062 ev_init (0);
1063
1064 evio_init (&wio, sin_cb, 0, EV_READ);
1065 evio_start (&wio);
1066
1067 struct ev_timer t[10000];
1068
1069#if 0
1070 int i;
1071 for (i = 0; i < 10000; ++i)
1072 { 2739 }
1073 struct ev_timer *w = t + i;
1074 evw_init (w, ocb, i);
1075 evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1076 evtimer_start (w);
1077 if (drand48 () < 0.5)
1078 evtimer_stop (w);
1079 }
1080#endif
1081
1082 struct ev_timer t1;
1083 evtimer_init (&t1, ocb, 5, 10);
1084 evtimer_start (&t1);
1085
1086 struct ev_signal sig;
1087 evsignal_init (&sig, scb, SIGQUIT);
1088 evsignal_start (&sig);
1089
1090 struct ev_check cw;
1091 evcheck_init (&cw, gcb);
1092 evcheck_start (&cw);
1093
1094 struct ev_idle iw;
1095 evidle_init (&iw, gcb);
1096 evidle_start (&iw);
1097
1098 ev_loop (0);
1099
1100 return 0;
1101} 2740}
1102 2741
2742#if EV_MULTIPLICITY
2743 #include "ev_wrap.h"
1103#endif 2744#endif
1104 2745
2746#ifdef __cplusplus
2747}
2748#endif
1105 2749
1106
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