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Comparing libev/ev.c (file contents):
Revision 1.11 by root, Wed Oct 31 07:40:49 2007 UTC vs.
Revision 1.248 by root, Wed May 21 23:25:21 2008 UTC

1/*
2 * libev event processing core, watcher management
3 *
4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are 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.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
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
133
1#include <math.h> 134#include <math.h>
2#include <stdlib.h> 135#include <stdlib.h>
3#include <unistd.h>
4#include <fcntl.h> 136#include <fcntl.h>
5#include <signal.h> 137#include <stddef.h>
6 138
7#include <stdio.h> 139#include <stdio.h>
8 140
9#include <assert.h> 141#include <assert.h>
10#include <errno.h> 142#include <errno.h>
11#include <sys/time.h> 143#include <sys/types.h>
12#include <time.h> 144#include <time.h>
13 145
14#ifndef HAVE_MONOTONIC 146#include <signal.h>
15# ifdef CLOCK_MONOTONIC 147
16# 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
17# endif 163# endif
18#endif 164#endif
19 165
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
20#ifndef HAVE_SELECT 180#ifndef EV_USE_SELECT
21# 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
22#endif 189# endif
190#endif
23 191
24#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
25# define HAVE_EPOLL 0 196# define EV_USE_EPOLL 0
26#endif 197# endif
198#endif
27 199
28#ifndef HAVE_REALTIME 200#ifndef EV_USE_KQUEUE
29# 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
30#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#ifndef EV_USE_4HEAP
241# define EV_USE_4HEAP !EV_MINIMAL
242#endif
243
244#ifndef EV_HEAP_CACHE_AT
245# define EV_HEAP_CACHE_AT !EV_MINIMAL
246#endif
247
248/* this block fixes any misconfiguration where we know we run into trouble otherwise */
249
250#ifndef CLOCK_MONOTONIC
251# undef EV_USE_MONOTONIC
252# define EV_USE_MONOTONIC 0
253#endif
254
255#ifndef CLOCK_REALTIME
256# undef EV_USE_REALTIME
257# define EV_USE_REALTIME 0
258#endif
259
260#if !EV_STAT_ENABLE
261# undef EV_USE_INOTIFY
262# define EV_USE_INOTIFY 0
263#endif
264
265#if !EV_USE_NANOSLEEP
266# ifndef _WIN32
267# include <sys/select.h>
268# endif
269#endif
270
271#if EV_USE_INOTIFY
272# include <sys/inotify.h>
273#endif
274
275#if EV_SELECT_IS_WINSOCKET
276# include <winsock.h>
277#endif
278
279#if EV_USE_EVENTFD
280/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
281# include <stdint.h>
282# ifdef __cplusplus
283extern "C" {
284# endif
285int eventfd (unsigned int initval, int flags);
286# ifdef __cplusplus
287}
288# endif
289#endif
290
291/**/
292
293/* undefined or zero: no verification done or available */
294/* 1 or higher: ev_loop_verify function available */
295/* 2 or higher: ev_loop_verify is called frequently */
296#define EV_VERIFY 1
297
298#if EV_VERIFY > 1
299# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
300#else
301# define EV_FREQUENT_CHECK do { } while (0)
302#endif
303
304/*
305 * This is used to avoid floating point rounding problems.
306 * It is added to ev_rt_now when scheduling periodics
307 * to ensure progress, time-wise, even when rounding
308 * errors are against us.
309 * This value is good at least till the year 4000.
310 * Better solutions welcome.
311 */
312#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
31 313
32#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 314#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
33#define MAX_BLOCKTIME 60. 315#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
316/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
34 317
35#include "ev.h" 318#if __GNUC__ >= 4
319# define expect(expr,value) __builtin_expect ((expr),(value))
320# define noinline __attribute__ ((noinline))
321#else
322# define expect(expr,value) (expr)
323# define noinline
324# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
325# define inline
326# endif
327#endif
36 328
37struct ev_watcher { 329#define expect_false(expr) expect ((expr) != 0, 0)
38 EV_WATCHER (ev_watcher); 330#define expect_true(expr) expect ((expr) != 0, 1)
39}; 331#define inline_size static inline
40 332
41struct ev_watcher_list { 333#if EV_MINIMAL
42 EV_WATCHER_LIST (ev_watcher_list); 334# define inline_speed static noinline
43}; 335#else
336# define inline_speed static inline
337#endif
44 338
339#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
340#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
341
342#define EMPTY /* required for microsofts broken pseudo-c compiler */
343#define EMPTY2(a,b) /* used to suppress some warnings */
344
45typedef struct ev_watcher *W; 345typedef ev_watcher *W;
46typedef struct ev_watcher_list *WL; 346typedef ev_watcher_list *WL;
347typedef ev_watcher_time *WT;
47 348
48static ev_tstamp now, diff; /* monotonic clock */ 349#define ev_active(w) ((W)(w))->active
350#define ev_at(w) ((WT)(w))->at
351
352#if EV_USE_MONOTONIC
353/* sig_atomic_t is used to avoid per-thread variables or locking but still */
354/* giving it a reasonably high chance of working on typical architetcures */
355static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
356#endif
357
358#ifdef _WIN32
359# include "ev_win32.c"
360#endif
361
362/*****************************************************************************/
363
364static void (*syserr_cb)(const char *msg);
365
366void
367ev_set_syserr_cb (void (*cb)(const char *msg))
368{
369 syserr_cb = cb;
370}
371
372static void noinline
373syserr (const char *msg)
374{
375 if (!msg)
376 msg = "(libev) system error";
377
378 if (syserr_cb)
379 syserr_cb (msg);
380 else
381 {
382 perror (msg);
383 abort ();
384 }
385}
386
387static void *
388ev_realloc_emul (void *ptr, long size)
389{
390 /* some systems, notably openbsd and darwin, fail to properly
391 * implement realloc (x, 0) (as required by both ansi c-98 and
392 * the single unix specification, so work around them here.
393 */
394
395 if (size)
396 return realloc (ptr, size);
397
398 free (ptr);
399 return 0;
400}
401
402static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
403
404void
405ev_set_allocator (void *(*cb)(void *ptr, long size))
406{
407 alloc = cb;
408}
409
410inline_speed void *
411ev_realloc (void *ptr, long size)
412{
413 ptr = alloc (ptr, size);
414
415 if (!ptr && size)
416 {
417 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
418 abort ();
419 }
420
421 return ptr;
422}
423
424#define ev_malloc(size) ev_realloc (0, (size))
425#define ev_free(ptr) ev_realloc ((ptr), 0)
426
427/*****************************************************************************/
428
429typedef struct
430{
431 WL head;
432 unsigned char events;
433 unsigned char reify;
434#if EV_SELECT_IS_WINSOCKET
435 SOCKET handle;
436#endif
437} ANFD;
438
439typedef struct
440{
441 W w;
442 int events;
443} ANPENDING;
444
445#if EV_USE_INOTIFY
446/* hash table entry per inotify-id */
447typedef struct
448{
449 WL head;
450} ANFS;
451#endif
452
453/* Heap Entry */
454#if EV_HEAP_CACHE_AT
455 typedef struct {
456 ev_tstamp at;
457 WT w;
458 } ANHE;
459
460 #define ANHE_w(he) (he).w /* access watcher, read-write */
461 #define ANHE_at(he) (he).at /* access cached at, read-only */
462 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
463#else
464 typedef WT ANHE;
465
466 #define ANHE_w(he) (he)
467 #define ANHE_at(he) (he)->at
468 #define ANHE_at_cache(he)
469#endif
470
471#if EV_MULTIPLICITY
472
473 struct ev_loop
474 {
475 ev_tstamp ev_rt_now;
476 #define ev_rt_now ((loop)->ev_rt_now)
477 #define VAR(name,decl) decl;
478 #include "ev_vars.h"
479 #undef VAR
480 };
481 #include "ev_wrap.h"
482
483 static struct ev_loop default_loop_struct;
484 struct ev_loop *ev_default_loop_ptr;
485
486#else
487
49ev_tstamp ev_now; 488 ev_tstamp ev_rt_now;
50int ev_method; 489 #define VAR(name,decl) static decl;
490 #include "ev_vars.h"
491 #undef VAR
51 492
52static int have_monotonic; /* runtime */ 493 static int ev_default_loop_ptr;
53 494
54static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 495#endif
55static void (*method_modify)(int fd, int oev, int nev);
56static void (*method_poll)(ev_tstamp timeout);
57 496
58/*****************************************************************************/ 497/*****************************************************************************/
59 498
60ev_tstamp 499ev_tstamp
61ev_time (void) 500ev_time (void)
62{ 501{
63#if HAVE_REALTIME 502#if EV_USE_REALTIME
64 struct timespec ts; 503 struct timespec ts;
65 clock_gettime (CLOCK_REALTIME, &ts); 504 clock_gettime (CLOCK_REALTIME, &ts);
66 return ts.tv_sec + ts.tv_nsec * 1e-9; 505 return ts.tv_sec + ts.tv_nsec * 1e-9;
67#else 506#else
68 struct timeval tv; 507 struct timeval tv;
69 gettimeofday (&tv, 0); 508 gettimeofday (&tv, 0);
70 return tv.tv_sec + tv.tv_usec * 1e-6; 509 return tv.tv_sec + tv.tv_usec * 1e-6;
71#endif 510#endif
72} 511}
73 512
74static ev_tstamp 513ev_tstamp inline_size
75get_clock (void) 514get_clock (void)
76{ 515{
77#if HAVE_MONOTONIC 516#if EV_USE_MONOTONIC
78 if (have_monotonic) 517 if (expect_true (have_monotonic))
79 { 518 {
80 struct timespec ts; 519 struct timespec ts;
81 clock_gettime (CLOCK_MONOTONIC, &ts); 520 clock_gettime (CLOCK_MONOTONIC, &ts);
82 return ts.tv_sec + ts.tv_nsec * 1e-9; 521 return ts.tv_sec + ts.tv_nsec * 1e-9;
83 } 522 }
84#endif 523#endif
85 524
86 return ev_time (); 525 return ev_time ();
87} 526}
88 527
89#define array_needsize(base,cur,cnt,init) \ 528#if EV_MULTIPLICITY
90 if ((cnt) > cur) \ 529ev_tstamp
91 { \ 530ev_now (EV_P)
92 int newcnt = cur ? cur << 1 : 16; \ 531{
93 fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\ 532 return ev_rt_now;
94 base = realloc (base, sizeof (*base) * (newcnt)); \ 533}
95 init (base + cur, newcnt - cur); \ 534#endif
96 cur = newcnt; \ 535
536void
537ev_sleep (ev_tstamp delay)
538{
539 if (delay > 0.)
97 } 540 {
541#if EV_USE_NANOSLEEP
542 struct timespec ts;
543
544 ts.tv_sec = (time_t)delay;
545 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
546
547 nanosleep (&ts, 0);
548#elif defined(_WIN32)
549 Sleep ((unsigned long)(delay * 1e3));
550#else
551 struct timeval tv;
552
553 tv.tv_sec = (time_t)delay;
554 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
555
556 select (0, 0, 0, 0, &tv);
557#endif
558 }
559}
98 560
99/*****************************************************************************/ 561/*****************************************************************************/
100 562
563#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
564
565int inline_size
566array_nextsize (int elem, int cur, int cnt)
567{
568 int ncur = cur + 1;
569
570 do
571 ncur <<= 1;
572 while (cnt > ncur);
573
574 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
575 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
576 {
577 ncur *= elem;
578 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
579 ncur = ncur - sizeof (void *) * 4;
580 ncur /= elem;
581 }
582
583 return ncur;
584}
585
586static noinline void *
587array_realloc (int elem, void *base, int *cur, int cnt)
588{
589 *cur = array_nextsize (elem, *cur, cnt);
590 return ev_realloc (base, elem * *cur);
591}
592
593#define array_needsize(type,base,cur,cnt,init) \
594 if (expect_false ((cnt) > (cur))) \
595 { \
596 int ocur_ = (cur); \
597 (base) = (type *)array_realloc \
598 (sizeof (type), (base), &(cur), (cnt)); \
599 init ((base) + (ocur_), (cur) - ocur_); \
600 }
601
602#if 0
603#define array_slim(type,stem) \
604 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
605 { \
606 stem ## max = array_roundsize (stem ## cnt >> 1); \
607 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
608 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
609 }
610#endif
611
612#define array_free(stem, idx) \
613 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
614
615/*****************************************************************************/
616
617void noinline
618ev_feed_event (EV_P_ void *w, int revents)
619{
620 W w_ = (W)w;
621 int pri = ABSPRI (w_);
622
623 if (expect_false (w_->pending))
624 pendings [pri][w_->pending - 1].events |= revents;
625 else
626 {
627 w_->pending = ++pendingcnt [pri];
628 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
629 pendings [pri][w_->pending - 1].w = w_;
630 pendings [pri][w_->pending - 1].events = revents;
631 }
632}
633
634void inline_speed
635queue_events (EV_P_ W *events, int eventcnt, int type)
636{
637 int i;
638
639 for (i = 0; i < eventcnt; ++i)
640 ev_feed_event (EV_A_ events [i], type);
641}
642
643/*****************************************************************************/
644
645void inline_size
646anfds_init (ANFD *base, int count)
647{
648 while (count--)
649 {
650 base->head = 0;
651 base->events = EV_NONE;
652 base->reify = 0;
653
654 ++base;
655 }
656}
657
658void inline_speed
659fd_event (EV_P_ int fd, int revents)
660{
661 ANFD *anfd = anfds + fd;
662 ev_io *w;
663
664 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
665 {
666 int ev = w->events & revents;
667
668 if (ev)
669 ev_feed_event (EV_A_ (W)w, ev);
670 }
671}
672
673void
674ev_feed_fd_event (EV_P_ int fd, int revents)
675{
676 if (fd >= 0 && fd < anfdmax)
677 fd_event (EV_A_ fd, revents);
678}
679
680void inline_size
681fd_reify (EV_P)
682{
683 int i;
684
685 for (i = 0; i < fdchangecnt; ++i)
686 {
687 int fd = fdchanges [i];
688 ANFD *anfd = anfds + fd;
689 ev_io *w;
690
691 unsigned char events = 0;
692
693 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
694 events |= (unsigned char)w->events;
695
696#if EV_SELECT_IS_WINSOCKET
697 if (events)
698 {
699 unsigned long argp;
700 #ifdef EV_FD_TO_WIN32_HANDLE
701 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
702 #else
703 anfd->handle = _get_osfhandle (fd);
704 #endif
705 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
706 }
707#endif
708
709 {
710 unsigned char o_events = anfd->events;
711 unsigned char o_reify = anfd->reify;
712
713 anfd->reify = 0;
714 anfd->events = events;
715
716 if (o_events != events || o_reify & EV_IOFDSET)
717 backend_modify (EV_A_ fd, o_events, events);
718 }
719 }
720
721 fdchangecnt = 0;
722}
723
724void inline_size
725fd_change (EV_P_ int fd, int flags)
726{
727 unsigned char reify = anfds [fd].reify;
728 anfds [fd].reify |= flags;
729
730 if (expect_true (!reify))
731 {
732 ++fdchangecnt;
733 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
734 fdchanges [fdchangecnt - 1] = fd;
735 }
736}
737
738void inline_speed
739fd_kill (EV_P_ int fd)
740{
741 ev_io *w;
742
743 while ((w = (ev_io *)anfds [fd].head))
744 {
745 ev_io_stop (EV_A_ w);
746 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
747 }
748}
749
750int inline_size
751fd_valid (int fd)
752{
753#ifdef _WIN32
754 return _get_osfhandle (fd) != -1;
755#else
756 return fcntl (fd, F_GETFD) != -1;
757#endif
758}
759
760/* called on EBADF to verify fds */
761static void noinline
762fd_ebadf (EV_P)
763{
764 int fd;
765
766 for (fd = 0; fd < anfdmax; ++fd)
767 if (anfds [fd].events)
768 if (!fd_valid (fd) == -1 && errno == EBADF)
769 fd_kill (EV_A_ fd);
770}
771
772/* called on ENOMEM in select/poll to kill some fds and retry */
773static void noinline
774fd_enomem (EV_P)
775{
776 int fd;
777
778 for (fd = anfdmax; fd--; )
779 if (anfds [fd].events)
780 {
781 fd_kill (EV_A_ fd);
782 return;
783 }
784}
785
786/* usually called after fork if backend needs to re-arm all fds from scratch */
787static void noinline
788fd_rearm_all (EV_P)
789{
790 int fd;
791
792 for (fd = 0; fd < anfdmax; ++fd)
793 if (anfds [fd].events)
794 {
795 anfds [fd].events = 0;
796 fd_change (EV_A_ fd, EV_IOFDSET | 1);
797 }
798}
799
800/*****************************************************************************/
801
802/*
803 * the heap functions want a real array index. array index 0 uis guaranteed to not
804 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
805 * the branching factor of the d-tree.
806 */
807
808/*
809 * at the moment we allow libev the luxury of two heaps,
810 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
811 * which is more cache-efficient.
812 * the difference is about 5% with 50000+ watchers.
813 */
814#if EV_USE_4HEAP
815
816#define DHEAP 4
817#define HEAP0 (DHEAP - 1) /* index of first element in heap */
818#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
819#define UPHEAP_DONE(p,k) ((p) == (k))
820
821/* away from the root */
822void inline_speed
823downheap (ANHE *heap, int N, int k)
824{
825 ANHE he = heap [k];
826 ANHE *E = heap + N + HEAP0;
827
828 for (;;)
829 {
830 ev_tstamp minat;
831 ANHE *minpos;
832 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
833
834 /* find minimum child */
835 if (expect_true (pos + DHEAP - 1 < E))
836 {
837 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
838 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
839 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
840 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
841 }
842 else if (pos < E)
843 {
844 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
845 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
846 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
847 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
848 }
849 else
850 break;
851
852 if (ANHE_at (he) <= minat)
853 break;
854
855 heap [k] = *minpos;
856 ev_active (ANHE_w (*minpos)) = k;
857
858 k = minpos - heap;
859 }
860
861 heap [k] = he;
862 ev_active (ANHE_w (he)) = k;
863}
864
865#else /* 4HEAP */
866
867#define HEAP0 1
868#define HPARENT(k) ((k) >> 1)
869#define UPHEAP_DONE(p,k) (!(p))
870
871/* away from the root */
872void inline_speed
873downheap (ANHE *heap, int N, int k)
874{
875 ANHE he = heap [k];
876
877 for (;;)
878 {
879 int c = k << 1;
880
881 if (c > N + HEAP0 - 1)
882 break;
883
884 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
885 ? 1 : 0;
886
887 if (ANHE_at (he) <= ANHE_at (heap [c]))
888 break;
889
890 heap [k] = heap [c];
891 ev_active (ANHE_w (heap [k])) = k;
892
893 k = c;
894 }
895
896 heap [k] = he;
897 ev_active (ANHE_w (he)) = k;
898}
899#endif
900
901/* towards the root */
902void inline_speed
903upheap (ANHE *heap, int k)
904{
905 ANHE he = heap [k];
906
907 for (;;)
908 {
909 int p = HPARENT (k);
910
911 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
912 break;
913
914 heap [k] = heap [p];
915 ev_active (ANHE_w (heap [k])) = k;
916 k = p;
917 }
918
919 heap [k] = he;
920 ev_active (ANHE_w (he)) = k;
921}
922
923void inline_size
924adjustheap (ANHE *heap, int N, int k)
925{
926 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
927 upheap (heap, k);
928 else
929 downheap (heap, N, k);
930}
931
932/* rebuild the heap: this function is used only once and executed rarely */
933void inline_size
934reheap (ANHE *heap, int N)
935{
936 int i;
937 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
938 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
939 for (i = 0; i < N; ++i)
940 upheap (heap, i + HEAP0);
941}
942
943#if EV_VERIFY
944static void
945checkheap (ANHE *heap, int N)
946{
947 int i;
948
949 for (i = HEAP0; i < N + HEAP0; ++i)
950 {
951 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
952 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
953 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
954 }
955}
956#endif
957
958/*****************************************************************************/
959
101typedef struct 960typedef struct
102{ 961{
103 struct ev_io *head; 962 WL head;
104 unsigned char wev, rev; /* want, received event set */ 963 EV_ATOMIC_T gotsig;
105} ANFD;
106
107static ANFD *anfds;
108static int anfdmax;
109
110static int *fdchanges;
111static int fdchangemax, fdchangecnt;
112
113static void
114anfds_init (ANFD *base, int count)
115{
116 while (count--)
117 {
118 base->head = 0;
119 base->wev = base->rev = EV_NONE;
120 ++base;
121 }
122}
123
124typedef struct
125{
126 W w;
127 int events;
128} ANPENDING;
129
130static ANPENDING *pendings;
131static int pendingmax, pendingcnt;
132
133static void
134event (W w, int events)
135{
136 w->pending = ++pendingcnt;
137 array_needsize (pendings, pendingmax, pendingcnt, );
138 pendings [pendingcnt - 1].w = w;
139 pendings [pendingcnt - 1].events = events;
140}
141
142static void
143fd_event (int fd, int events)
144{
145 ANFD *anfd = anfds + fd;
146 struct ev_io *w;
147
148 for (w = anfd->head; w; w = w->next)
149 {
150 int ev = w->events & events;
151
152 if (ev)
153 event ((W)w, ev);
154 }
155}
156
157static void
158queue_events (W *events, int eventcnt, int type)
159{
160 int i;
161
162 for (i = 0; i < eventcnt; ++i)
163 event (events [i], type);
164}
165
166/*****************************************************************************/
167
168static struct ev_timer **atimers;
169static int atimermax, atimercnt;
170
171static struct ev_timer **rtimers;
172static int rtimermax, rtimercnt;
173
174static void
175upheap (struct ev_timer **timers, int k)
176{
177 struct ev_timer *w = timers [k];
178
179 while (k && timers [k >> 1]->at > w->at)
180 {
181 timers [k] = timers [k >> 1];
182 timers [k]->active = k + 1;
183 k >>= 1;
184 }
185
186 timers [k] = w;
187 timers [k]->active = k + 1;
188
189}
190
191static void
192downheap (struct ev_timer **timers, int N, int k)
193{
194 struct ev_timer *w = timers [k];
195
196 while (k < (N >> 1))
197 {
198 int j = k << 1;
199
200 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
201 ++j;
202
203 if (w->at <= timers [j]->at)
204 break;
205
206 timers [k] = timers [j];
207 timers [k]->active = k + 1;
208 k = j;
209 }
210
211 timers [k] = w;
212 timers [k]->active = k + 1;
213}
214
215/*****************************************************************************/
216
217typedef struct
218{
219 struct ev_signal *head;
220 sig_atomic_t gotsig;
221} ANSIG; 964} ANSIG;
222 965
223static ANSIG *signals; 966static ANSIG *signals;
224static int signalmax; 967static int signalmax;
225 968
226static int sigpipe [2]; 969static EV_ATOMIC_T gotsig;
227static sig_atomic_t gotsig;
228static struct ev_io sigev;
229 970
230static void 971void inline_size
231signals_init (ANSIG *base, int count) 972signals_init (ANSIG *base, int count)
232{ 973{
233 while (count--) 974 while (count--)
234 { 975 {
235 base->head = 0; 976 base->head = 0;
236 base->gotsig = 0; 977 base->gotsig = 0;
978
237 ++base; 979 ++base;
238 } 980 }
239} 981}
240 982
983/*****************************************************************************/
984
985void inline_speed
986fd_intern (int fd)
987{
988#ifdef _WIN32
989 int arg = 1;
990 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
991#else
992 fcntl (fd, F_SETFD, FD_CLOEXEC);
993 fcntl (fd, F_SETFL, O_NONBLOCK);
994#endif
995}
996
997static void noinline
998evpipe_init (EV_P)
999{
1000 if (!ev_is_active (&pipeev))
1001 {
1002#if EV_USE_EVENTFD
1003 if ((evfd = eventfd (0, 0)) >= 0)
1004 {
1005 evpipe [0] = -1;
1006 fd_intern (evfd);
1007 ev_io_set (&pipeev, evfd, EV_READ);
1008 }
1009 else
1010#endif
1011 {
1012 while (pipe (evpipe))
1013 syserr ("(libev) error creating signal/async pipe");
1014
1015 fd_intern (evpipe [0]);
1016 fd_intern (evpipe [1]);
1017 ev_io_set (&pipeev, evpipe [0], EV_READ);
1018 }
1019
1020 ev_io_start (EV_A_ &pipeev);
1021 ev_unref (EV_A); /* watcher should not keep loop alive */
1022 }
1023}
1024
1025void inline_size
1026evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1027{
1028 if (!*flag)
1029 {
1030 int old_errno = errno; /* save errno because write might clobber it */
1031
1032 *flag = 1;
1033
1034#if EV_USE_EVENTFD
1035 if (evfd >= 0)
1036 {
1037 uint64_t counter = 1;
1038 write (evfd, &counter, sizeof (uint64_t));
1039 }
1040 else
1041#endif
1042 write (evpipe [1], &old_errno, 1);
1043
1044 errno = old_errno;
1045 }
1046}
1047
241static void 1048static void
1049pipecb (EV_P_ ev_io *iow, int revents)
1050{
1051#if EV_USE_EVENTFD
1052 if (evfd >= 0)
1053 {
1054 uint64_t counter;
1055 read (evfd, &counter, sizeof (uint64_t));
1056 }
1057 else
1058#endif
1059 {
1060 char dummy;
1061 read (evpipe [0], &dummy, 1);
1062 }
1063
1064 if (gotsig && ev_is_default_loop (EV_A))
1065 {
1066 int signum;
1067 gotsig = 0;
1068
1069 for (signum = signalmax; signum--; )
1070 if (signals [signum].gotsig)
1071 ev_feed_signal_event (EV_A_ signum + 1);
1072 }
1073
1074#if EV_ASYNC_ENABLE
1075 if (gotasync)
1076 {
1077 int i;
1078 gotasync = 0;
1079
1080 for (i = asynccnt; i--; )
1081 if (asyncs [i]->sent)
1082 {
1083 asyncs [i]->sent = 0;
1084 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1085 }
1086 }
1087#endif
1088}
1089
1090/*****************************************************************************/
1091
1092static void
242sighandler (int signum) 1093ev_sighandler (int signum)
243{ 1094{
1095#if EV_MULTIPLICITY
1096 struct ev_loop *loop = &default_loop_struct;
1097#endif
1098
1099#if _WIN32
1100 signal (signum, ev_sighandler);
1101#endif
1102
244 signals [signum - 1].gotsig = 1; 1103 signals [signum - 1].gotsig = 1;
1104 evpipe_write (EV_A_ &gotsig);
1105}
245 1106
246 if (!gotsig) 1107void noinline
1108ev_feed_signal_event (EV_P_ int signum)
1109{
1110 WL w;
1111
1112#if EV_MULTIPLICITY
1113 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1114#endif
1115
1116 --signum;
1117
1118 if (signum < 0 || signum >= signalmax)
1119 return;
1120
1121 signals [signum].gotsig = 0;
1122
1123 for (w = signals [signum].head; w; w = w->next)
1124 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1125}
1126
1127/*****************************************************************************/
1128
1129static WL childs [EV_PID_HASHSIZE];
1130
1131#ifndef _WIN32
1132
1133static ev_signal childev;
1134
1135#ifndef WIFCONTINUED
1136# define WIFCONTINUED(status) 0
1137#endif
1138
1139void inline_speed
1140child_reap (EV_P_ int chain, int pid, int status)
1141{
1142 ev_child *w;
1143 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1144
1145 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1146 {
1147 if ((w->pid == pid || !w->pid)
1148 && (!traced || (w->flags & 1)))
1149 {
1150 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1151 w->rpid = pid;
1152 w->rstatus = status;
1153 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1154 }
1155 }
1156}
1157
1158#ifndef WCONTINUED
1159# define WCONTINUED 0
1160#endif
1161
1162static void
1163childcb (EV_P_ ev_signal *sw, int revents)
1164{
1165 int pid, status;
1166
1167 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1168 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1169 if (!WCONTINUED
1170 || errno != EINVAL
1171 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1172 return;
1173
1174 /* make sure we are called again until all children have been reaped */
1175 /* we need to do it this way so that the callback gets called before we continue */
1176 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1177
1178 child_reap (EV_A_ pid, pid, status);
1179 if (EV_PID_HASHSIZE > 1)
1180 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1181}
1182
1183#endif
1184
1185/*****************************************************************************/
1186
1187#if EV_USE_PORT
1188# include "ev_port.c"
1189#endif
1190#if EV_USE_KQUEUE
1191# include "ev_kqueue.c"
1192#endif
1193#if EV_USE_EPOLL
1194# include "ev_epoll.c"
1195#endif
1196#if EV_USE_POLL
1197# include "ev_poll.c"
1198#endif
1199#if EV_USE_SELECT
1200# include "ev_select.c"
1201#endif
1202
1203int
1204ev_version_major (void)
1205{
1206 return EV_VERSION_MAJOR;
1207}
1208
1209int
1210ev_version_minor (void)
1211{
1212 return EV_VERSION_MINOR;
1213}
1214
1215/* return true if we are running with elevated privileges and should ignore env variables */
1216int inline_size
1217enable_secure (void)
1218{
1219#ifdef _WIN32
1220 return 0;
1221#else
1222 return getuid () != geteuid ()
1223 || getgid () != getegid ();
1224#endif
1225}
1226
1227unsigned int
1228ev_supported_backends (void)
1229{
1230 unsigned int flags = 0;
1231
1232 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1233 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1234 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1235 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1236 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1237
1238 return flags;
1239}
1240
1241unsigned int
1242ev_recommended_backends (void)
1243{
1244 unsigned int flags = ev_supported_backends ();
1245
1246#ifndef __NetBSD__
1247 /* kqueue is borked on everything but netbsd apparently */
1248 /* it usually doesn't work correctly on anything but sockets and pipes */
1249 flags &= ~EVBACKEND_KQUEUE;
1250#endif
1251#ifdef __APPLE__
1252 // flags &= ~EVBACKEND_KQUEUE; for documentation
1253 flags &= ~EVBACKEND_POLL;
1254#endif
1255
1256 return flags;
1257}
1258
1259unsigned int
1260ev_embeddable_backends (void)
1261{
1262 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1263
1264 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1265 /* please fix it and tell me how to detect the fix */
1266 flags &= ~EVBACKEND_EPOLL;
1267
1268 return flags;
1269}
1270
1271unsigned int
1272ev_backend (EV_P)
1273{
1274 return backend;
1275}
1276
1277unsigned int
1278ev_loop_count (EV_P)
1279{
1280 return loop_count;
1281}
1282
1283void
1284ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1285{
1286 io_blocktime = interval;
1287}
1288
1289void
1290ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1291{
1292 timeout_blocktime = interval;
1293}
1294
1295static void noinline
1296loop_init (EV_P_ unsigned int flags)
1297{
1298 if (!backend)
1299 {
1300#if EV_USE_MONOTONIC
247 { 1301 {
1302 struct timespec ts;
1303 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1304 have_monotonic = 1;
1305 }
1306#endif
1307
1308 ev_rt_now = ev_time ();
1309 mn_now = get_clock ();
1310 now_floor = mn_now;
1311 rtmn_diff = ev_rt_now - mn_now;
1312
1313 io_blocktime = 0.;
1314 timeout_blocktime = 0.;
1315 backend = 0;
1316 backend_fd = -1;
1317 gotasync = 0;
1318#if EV_USE_INOTIFY
1319 fs_fd = -2;
1320#endif
1321
1322 /* pid check not overridable via env */
1323#ifndef _WIN32
1324 if (flags & EVFLAG_FORKCHECK)
1325 curpid = getpid ();
1326#endif
1327
1328 if (!(flags & EVFLAG_NOENV)
1329 && !enable_secure ()
1330 && getenv ("LIBEV_FLAGS"))
1331 flags = atoi (getenv ("LIBEV_FLAGS"));
1332
1333 if (!(flags & 0x0000ffffU))
1334 flags |= ev_recommended_backends ();
1335
1336#if EV_USE_PORT
1337 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1338#endif
1339#if EV_USE_KQUEUE
1340 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1341#endif
1342#if EV_USE_EPOLL
1343 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1344#endif
1345#if EV_USE_POLL
1346 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1347#endif
1348#if EV_USE_SELECT
1349 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1350#endif
1351
1352 ev_init (&pipeev, pipecb);
1353 ev_set_priority (&pipeev, EV_MAXPRI);
1354 }
1355}
1356
1357static void noinline
1358loop_destroy (EV_P)
1359{
1360 int i;
1361
1362 if (ev_is_active (&pipeev))
1363 {
1364 ev_ref (EV_A); /* signal watcher */
1365 ev_io_stop (EV_A_ &pipeev);
1366
1367#if EV_USE_EVENTFD
1368 if (evfd >= 0)
1369 close (evfd);
1370#endif
1371
1372 if (evpipe [0] >= 0)
1373 {
1374 close (evpipe [0]);
1375 close (evpipe [1]);
1376 }
1377 }
1378
1379#if EV_USE_INOTIFY
1380 if (fs_fd >= 0)
1381 close (fs_fd);
1382#endif
1383
1384 if (backend_fd >= 0)
1385 close (backend_fd);
1386
1387#if EV_USE_PORT
1388 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1389#endif
1390#if EV_USE_KQUEUE
1391 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1392#endif
1393#if EV_USE_EPOLL
1394 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1395#endif
1396#if EV_USE_POLL
1397 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1398#endif
1399#if EV_USE_SELECT
1400 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1401#endif
1402
1403 for (i = NUMPRI; i--; )
1404 {
1405 array_free (pending, [i]);
1406#if EV_IDLE_ENABLE
1407 array_free (idle, [i]);
1408#endif
1409 }
1410
1411 ev_free (anfds); anfdmax = 0;
1412
1413 /* have to use the microsoft-never-gets-it-right macro */
1414 array_free (fdchange, EMPTY);
1415 array_free (timer, EMPTY);
1416#if EV_PERIODIC_ENABLE
1417 array_free (periodic, EMPTY);
1418#endif
1419#if EV_FORK_ENABLE
1420 array_free (fork, EMPTY);
1421#endif
1422 array_free (prepare, EMPTY);
1423 array_free (check, EMPTY);
1424#if EV_ASYNC_ENABLE
1425 array_free (async, EMPTY);
1426#endif
1427
1428 backend = 0;
1429}
1430
1431#if EV_USE_INOTIFY
1432void inline_size infy_fork (EV_P);
1433#endif
1434
1435void inline_size
1436loop_fork (EV_P)
1437{
1438#if EV_USE_PORT
1439 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1440#endif
1441#if EV_USE_KQUEUE
1442 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1443#endif
1444#if EV_USE_EPOLL
1445 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1446#endif
1447#if EV_USE_INOTIFY
1448 infy_fork (EV_A);
1449#endif
1450
1451 if (ev_is_active (&pipeev))
1452 {
1453 /* this "locks" the handlers against writing to the pipe */
1454 /* while we modify the fd vars */
248 gotsig = 1; 1455 gotsig = 1;
249 write (sigpipe [1], &gotsig, 1); 1456#if EV_ASYNC_ENABLE
250 } 1457 gotasync = 1;
251} 1458#endif
252 1459
1460 ev_ref (EV_A);
1461 ev_io_stop (EV_A_ &pipeev);
1462
1463#if EV_USE_EVENTFD
1464 if (evfd >= 0)
1465 close (evfd);
1466#endif
1467
1468 if (evpipe [0] >= 0)
1469 {
1470 close (evpipe [0]);
1471 close (evpipe [1]);
1472 }
1473
1474 evpipe_init (EV_A);
1475 /* now iterate over everything, in case we missed something */
1476 pipecb (EV_A_ &pipeev, EV_READ);
1477 }
1478
1479 postfork = 0;
1480}
1481
1482#if EV_MULTIPLICITY
1483struct ev_loop *
1484ev_loop_new (unsigned int flags)
1485{
1486 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1487
1488 memset (loop, 0, sizeof (struct ev_loop));
1489
1490 loop_init (EV_A_ flags);
1491
1492 if (ev_backend (EV_A))
1493 return loop;
1494
1495 return 0;
1496}
1497
1498void
1499ev_loop_destroy (EV_P)
1500{
1501 loop_destroy (EV_A);
1502 ev_free (loop);
1503}
1504
1505void
1506ev_loop_fork (EV_P)
1507{
1508 postfork = 1; /* must be in line with ev_default_fork */
1509}
1510
1511#if EV_VERIFY
253static void 1512static void
254sigcb (struct ev_io *iow, int revents) 1513array_check (W **ws, int cnt)
255{ 1514{
256 struct ev_signal *w; 1515 while (cnt--)
1516 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1517}
1518
1519static void
1520ev_loop_verify (EV_P)
1521{
257 int sig; 1522 int i;
258 1523
259 gotsig = 0; 1524 checkheap (timers, timercnt);
260 read (sigpipe [0], &revents, 1); 1525#if EV_PERIODIC_ENABLE
1526 checkheap (periodics, periodiccnt);
1527#endif
261 1528
262 for (sig = signalmax; sig--; ) 1529#if EV_IDLE_ENABLE
263 if (signals [sig].gotsig) 1530 for (i = NUMPRI; i--; )
1531 array_check ((W **)idles [i], idlecnt [i]);
1532#endif
1533#if EV_FORK_ENABLE
1534 array_check ((W **)forks, forkcnt);
1535#endif
1536 array_check ((W **)prepares, preparecnt);
1537 array_check ((W **)checks, checkcnt);
1538#if EV_ASYNC_ENABLE
1539 array_check ((W **)asyncs, asynccnt);
1540#endif
1541}
1542#endif
1543
1544#endif
1545
1546#if EV_MULTIPLICITY
1547struct ev_loop *
1548ev_default_loop_init (unsigned int flags)
1549#else
1550int
1551ev_default_loop (unsigned int flags)
1552#endif
1553{
1554 if (!ev_default_loop_ptr)
1555 {
1556#if EV_MULTIPLICITY
1557 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1558#else
1559 ev_default_loop_ptr = 1;
1560#endif
1561
1562 loop_init (EV_A_ flags);
1563
1564 if (ev_backend (EV_A))
1565 {
1566#ifndef _WIN32
1567 ev_signal_init (&childev, childcb, SIGCHLD);
1568 ev_set_priority (&childev, EV_MAXPRI);
1569 ev_signal_start (EV_A_ &childev);
1570 ev_unref (EV_A); /* child watcher should not keep loop alive */
1571#endif
1572 }
1573 else
1574 ev_default_loop_ptr = 0;
1575 }
1576
1577 return ev_default_loop_ptr;
1578}
1579
1580void
1581ev_default_destroy (void)
1582{
1583#if EV_MULTIPLICITY
1584 struct ev_loop *loop = ev_default_loop_ptr;
1585#endif
1586
1587#ifndef _WIN32
1588 ev_ref (EV_A); /* child watcher */
1589 ev_signal_stop (EV_A_ &childev);
1590#endif
1591
1592 loop_destroy (EV_A);
1593}
1594
1595void
1596ev_default_fork (void)
1597{
1598#if EV_MULTIPLICITY
1599 struct ev_loop *loop = ev_default_loop_ptr;
1600#endif
1601
1602 if (backend)
1603 postfork = 1; /* must be in line with ev_loop_fork */
1604}
1605
1606/*****************************************************************************/
1607
1608void
1609ev_invoke (EV_P_ void *w, int revents)
1610{
1611 EV_CB_INVOKE ((W)w, revents);
1612}
1613
1614void inline_speed
1615call_pending (EV_P)
1616{
1617 int pri;
1618
1619 EV_FREQUENT_CHECK;
1620
1621 for (pri = NUMPRI; pri--; )
1622 while (pendingcnt [pri])
264 { 1623 {
265 signals [sig].gotsig = 0; 1624 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
266 1625
267 for (w = signals [sig].head; w; w = w->next) 1626 if (expect_true (p->w))
268 event ((W)w, EV_SIGNAL); 1627 {
1628 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1629
1630 p->w->pending = 0;
1631 EV_CB_INVOKE (p->w, p->events);
1632 }
269 } 1633 }
270}
271 1634
272static void 1635 EV_FREQUENT_CHECK;
273siginit (void)
274{
275 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
276 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
277
278 /* rather than sort out wether we really need nb, set it */
279 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
280 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
281
282 evio_set (&sigev, sigpipe [0], EV_READ);
283 evio_start (&sigev);
284} 1636}
285 1637
286/*****************************************************************************/ 1638#if EV_IDLE_ENABLE
287 1639void inline_size
288static struct ev_idle **idles; 1640idle_reify (EV_P)
289static int idlemax, idlecnt;
290
291static struct ev_check **checks;
292static int checkmax, checkcnt;
293
294/*****************************************************************************/
295
296#if HAVE_EPOLL
297# include "ev_epoll.c"
298#endif
299#if HAVE_SELECT
300# include "ev_select.c"
301#endif
302
303int ev_init (int flags)
304{ 1641{
305#if HAVE_MONOTONIC 1642 if (expect_false (idleall))
306 {
307 struct timespec ts;
308 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
309 have_monotonic = 1;
310 }
311#endif
312
313 ev_now = ev_time ();
314 now = get_clock ();
315 diff = ev_now - now;
316
317 if (pipe (sigpipe))
318 return 0;
319
320 ev_method = EVMETHOD_NONE;
321#if HAVE_EPOLL
322 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
323#endif
324#if HAVE_SELECT
325 if (ev_method == EVMETHOD_NONE) select_init (flags);
326#endif
327
328 if (ev_method)
329 {
330 evw_init (&sigev, sigcb, 0);
331 siginit ();
332 } 1643 {
1644 int pri;
333 1645
334 return ev_method; 1646 for (pri = NUMPRI; pri--; )
335}
336
337/*****************************************************************************/
338
339void ev_prefork (void)
340{
341 /* nop */
342}
343
344void ev_postfork_parent (void)
345{
346 /* nop */
347}
348
349void ev_postfork_child (void)
350{
351#if HAVE_EPOLL
352 if (ev_method == EVMETHOD_EPOLL)
353 epoll_postfork_child ();
354#endif
355
356 evio_stop (&sigev);
357 close (sigpipe [0]);
358 close (sigpipe [1]);
359 pipe (sigpipe);
360 siginit ();
361}
362
363/*****************************************************************************/
364
365static void
366fd_reify (void)
367{
368 int i;
369
370 for (i = 0; i < fdchangecnt; ++i)
371 {
372 int fd = fdchanges [i];
373 ANFD *anfd = anfds + fd;
374 struct ev_io *w;
375
376 int wev = 0;
377
378 for (w = anfd->head; w; w = w->next)
379 wev |= w->events;
380
381 if (anfd->wev != wev)
382 { 1647 {
383 method_modify (fd, anfd->wev, wev); 1648 if (pendingcnt [pri])
384 anfd->wev = wev; 1649 break;
1650
1651 if (idlecnt [pri])
1652 {
1653 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1654 break;
1655 }
385 } 1656 }
386 } 1657 }
387
388 fdchangecnt = 0;
389} 1658}
1659#endif
390 1660
391static void 1661void inline_size
392call_pending () 1662timers_reify (EV_P)
393{ 1663{
394 int i; 1664 EV_FREQUENT_CHECK;
395 1665
396 for (i = 0; i < pendingcnt; ++i) 1666 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
397 {
398 ANPENDING *p = pendings + i;
399
400 if (p->w)
401 {
402 p->w->pending = 0;
403 p->w->cb (p->w, p->events);
404 }
405 } 1667 {
1668 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
406 1669
407 pendingcnt = 0; 1670 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
408}
409
410static void
411timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)
412{
413 while (timercnt && timers [0]->at <= now)
414 {
415 struct ev_timer *w = timers [0];
416 1671
417 /* first reschedule or stop timer */ 1672 /* first reschedule or stop timer */
418 if (w->repeat) 1673 if (w->repeat)
419 { 1674 {
420 if (w->is_abs) 1675 ev_at (w) += w->repeat;
421 w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat; 1676 if (ev_at (w) < mn_now)
422 else 1677 ev_at (w) = mn_now;
423 w->at = now + w->repeat;
424 1678
425 assert (w->at > now); 1679 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
426 1680
1681 ANHE_at_cache (timers [HEAP0]);
427 downheap (timers, timercnt, 0); 1682 downheap (timers, timercnt, HEAP0);
428 } 1683 }
429 else 1684 else
1685 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1686
1687 EV_FREQUENT_CHECK;
1688 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1689 }
1690}
1691
1692#if EV_PERIODIC_ENABLE
1693void inline_size
1694periodics_reify (EV_P)
1695{
1696 EV_FREQUENT_CHECK;
1697 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1698 {
1699 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1700
1701 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1702
1703 /* first reschedule or stop timer */
1704 if (w->reschedule_cb)
430 { 1705 {
431 evtimer_stop (w); /* nonrepeating: stop timer */ 1706 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
432 --timercnt; /* maybe pass by reference instead? */ 1707
1708 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1709
1710 ANHE_at_cache (periodics [HEAP0]);
1711 downheap (periodics, periodiccnt, HEAP0);
1712 EV_FREQUENT_CHECK;
433 } 1713 }
1714 else if (w->interval)
1715 {
1716 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1717 /* if next trigger time is not sufficiently in the future, put it there */
1718 /* this might happen because of floating point inexactness */
1719 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1720 {
1721 ev_at (w) += w->interval;
434 1722
435 event ((W)w, EV_TIMEOUT); 1723 /* if interval is unreasonably low we might still have a time in the past */
436 } 1724 /* so correct this. this will make the periodic very inexact, but the user */
437} 1725 /* has effectively asked to get triggered more often than possible */
1726 if (ev_at (w) < ev_rt_now)
1727 ev_at (w) = ev_rt_now;
1728 }
438 1729
439static void 1730 ANHE_at_cache (periodics [HEAP0]);
440time_update () 1731 downheap (periodics, periodiccnt, HEAP0);
1732 }
1733 else
1734 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1735
1736 EV_FREQUENT_CHECK;
1737 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1738 }
1739}
1740
1741static void noinline
1742periodics_reschedule (EV_P)
441{ 1743{
442 int i; 1744 int i;
443 ev_now = ev_time ();
444 1745
445 if (have_monotonic) 1746 /* adjust periodics after time jump */
1747 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1748 {
1749 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1750
1751 if (w->reschedule_cb)
1752 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1753 else if (w->interval)
1754 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1755
1756 ANHE_at_cache (periodics [i]);
446 { 1757 }
1758
1759 reheap (periodics, periodiccnt);
1760}
1761#endif
1762
1763void inline_speed
1764time_update (EV_P_ ev_tstamp max_block)
1765{
1766 int i;
1767
1768#if EV_USE_MONOTONIC
1769 if (expect_true (have_monotonic))
1770 {
447 ev_tstamp odiff = diff; 1771 ev_tstamp odiff = rtmn_diff;
448 1772
449 /* detecting time jumps is much more difficult */ 1773 mn_now = get_clock ();
450 for (i = 2; --i; ) /* loop a few times, before making important decisions */ 1774
1775 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1776 /* interpolate in the meantime */
1777 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
451 { 1778 {
452 now = get_clock (); 1779 ev_rt_now = rtmn_diff + mn_now;
1780 return;
1781 }
1782
1783 now_floor = mn_now;
1784 ev_rt_now = ev_time ();
1785
1786 /* loop a few times, before making important decisions.
1787 * on the choice of "4": one iteration isn't enough,
1788 * in case we get preempted during the calls to
1789 * ev_time and get_clock. a second call is almost guaranteed
1790 * to succeed in that case, though. and looping a few more times
1791 * doesn't hurt either as we only do this on time-jumps or
1792 * in the unlikely event of having been preempted here.
1793 */
1794 for (i = 4; --i; )
1795 {
453 diff = ev_now - now; 1796 rtmn_diff = ev_rt_now - mn_now;
454 1797
455 if (fabs (odiff - diff) < MIN_TIMEJUMP) 1798 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
456 return; /* all is well */ 1799 return; /* all is well */
457 1800
458 ev_now = ev_time (); 1801 ev_rt_now = ev_time ();
1802 mn_now = get_clock ();
1803 now_floor = mn_now;
459 } 1804 }
460 1805
461 /* time jump detected, reschedule atimers */ 1806# if EV_PERIODIC_ENABLE
462 for (i = 0; i < atimercnt; ++i) 1807 periodics_reschedule (EV_A);
1808# endif
1809 /* no timer adjustment, as the monotonic clock doesn't jump */
1810 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1811 }
1812 else
1813#endif
1814 {
1815 ev_rt_now = ev_time ();
1816
1817 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
463 { 1818 {
464 struct ev_timer *w = atimers [i]; 1819#if EV_PERIODIC_ENABLE
465 w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat; 1820 periodics_reschedule (EV_A);
1821#endif
1822 /* adjust timers. this is easy, as the offset is the same for all of them */
1823 for (i = 0; i < timercnt; ++i)
1824 {
1825 ANHE *he = timers + i + HEAP0;
1826 ANHE_w (*he)->at += ev_rt_now - mn_now;
1827 ANHE_at_cache (*he);
1828 }
466 } 1829 }
467 }
468 else
469 {
470 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
471 /* time jump detected, adjust rtimers */
472 for (i = 0; i < rtimercnt; ++i)
473 rtimers [i]->at += ev_now - now;
474 1830
475 now = ev_now; 1831 mn_now = ev_rt_now;
476 }
477}
478
479int ev_loop_done;
480
481void ev_loop (int flags)
482{
483 double block;
484 ev_loop_done = flags & EVLOOP_ONESHOT;
485
486 if (checkcnt)
487 { 1832 }
488 queue_events ((W *)checks, checkcnt, EV_CHECK); 1833}
489 call_pending (); 1834
490 } 1835void
1836ev_ref (EV_P)
1837{
1838 ++activecnt;
1839}
1840
1841void
1842ev_unref (EV_P)
1843{
1844 --activecnt;
1845}
1846
1847static int loop_done;
1848
1849void
1850ev_loop (EV_P_ int flags)
1851{
1852 loop_done = EVUNLOOP_CANCEL;
1853
1854 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
491 1855
492 do 1856 do
493 { 1857 {
1858#ifndef _WIN32
1859 if (expect_false (curpid)) /* penalise the forking check even more */
1860 if (expect_false (getpid () != curpid))
1861 {
1862 curpid = getpid ();
1863 postfork = 1;
1864 }
1865#endif
1866
1867#if EV_FORK_ENABLE
1868 /* we might have forked, so queue fork handlers */
1869 if (expect_false (postfork))
1870 if (forkcnt)
1871 {
1872 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1873 call_pending (EV_A);
1874 }
1875#endif
1876
1877 /* queue prepare watchers (and execute them) */
1878 if (expect_false (preparecnt))
1879 {
1880 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1881 call_pending (EV_A);
1882 }
1883
1884 if (expect_false (!activecnt))
1885 break;
1886
1887 /* we might have forked, so reify kernel state if necessary */
1888 if (expect_false (postfork))
1889 loop_fork (EV_A);
1890
494 /* update fd-related kernel structures */ 1891 /* update fd-related kernel structures */
495 fd_reify (); 1892 fd_reify (EV_A);
496 1893
497 /* calculate blocking time */ 1894 /* calculate blocking time */
498 if (flags & EVLOOP_NONBLOCK || idlecnt) 1895 {
499 block = 0.; 1896 ev_tstamp waittime = 0.;
500 else 1897 ev_tstamp sleeptime = 0.;
1898
1899 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
501 { 1900 {
1901 /* update time to cancel out callback processing overhead */
1902 time_update (EV_A_ 1e100);
1903
502 block = MAX_BLOCKTIME; 1904 waittime = MAX_BLOCKTIME;
503 1905
504 if (rtimercnt) 1906 if (timercnt)
505 { 1907 {
506 ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge; 1908 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
507 if (block > to) block = to; 1909 if (waittime > to) waittime = to;
508 } 1910 }
509 1911
1912#if EV_PERIODIC_ENABLE
510 if (atimercnt) 1913 if (periodiccnt)
511 { 1914 {
512 ev_tstamp to = atimers [0]->at - ev_time () + method_fudge; 1915 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
513 if (block > to) block = to; 1916 if (waittime > to) waittime = to;
514 } 1917 }
1918#endif
515 1919
516 if (block < 0.) block = 0.; 1920 if (expect_false (waittime < timeout_blocktime))
1921 waittime = timeout_blocktime;
1922
1923 sleeptime = waittime - backend_fudge;
1924
1925 if (expect_true (sleeptime > io_blocktime))
1926 sleeptime = io_blocktime;
1927
1928 if (sleeptime)
1929 {
1930 ev_sleep (sleeptime);
1931 waittime -= sleeptime;
1932 }
517 } 1933 }
518 1934
519 method_poll (block); 1935 ++loop_count;
1936 backend_poll (EV_A_ waittime);
520 1937
521 /* update ev_now, do magic */ 1938 /* update ev_rt_now, do magic */
522 time_update (); 1939 time_update (EV_A_ waittime + sleeptime);
1940 }
523 1941
524 /* queue pending timers and reschedule them */ 1942 /* queue pending timers and reschedule them */
525 /* absolute timers first */ 1943 timers_reify (EV_A); /* relative timers called last */
526 timers_reify (atimers, atimercnt, ev_now); 1944#if EV_PERIODIC_ENABLE
527 /* relative timers second */ 1945 periodics_reify (EV_A); /* absolute timers called first */
528 timers_reify (rtimers, rtimercnt, now); 1946#endif
529 1947
1948#if EV_IDLE_ENABLE
530 /* queue idle watchers unless io or timers are pending */ 1949 /* queue idle watchers unless other events are pending */
531 if (!pendingcnt) 1950 idle_reify (EV_A);
532 queue_events ((W *)idles, idlecnt, EV_IDLE); 1951#endif
533 1952
534 /* queue check and possibly idle watchers */ 1953 /* queue check watchers, to be executed first */
1954 if (expect_false (checkcnt))
535 queue_events ((W *)checks, checkcnt, EV_CHECK); 1955 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
536 1956
537 call_pending (); 1957 call_pending (EV_A);
538 } 1958 }
539 while (!ev_loop_done); 1959 while (expect_true (
1960 activecnt
1961 && !loop_done
1962 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1963 ));
1964
1965 if (loop_done == EVUNLOOP_ONE)
1966 loop_done = EVUNLOOP_CANCEL;
1967}
1968
1969void
1970ev_unloop (EV_P_ int how)
1971{
1972 loop_done = how;
540} 1973}
541 1974
542/*****************************************************************************/ 1975/*****************************************************************************/
543 1976
544static void 1977void inline_size
545wlist_add (WL *head, WL elem) 1978wlist_add (WL *head, WL elem)
546{ 1979{
547 elem->next = *head; 1980 elem->next = *head;
548 *head = elem; 1981 *head = elem;
549} 1982}
550 1983
551static void 1984void inline_size
552wlist_del (WL *head, WL elem) 1985wlist_del (WL *head, WL elem)
553{ 1986{
554 while (*head) 1987 while (*head)
555 { 1988 {
556 if (*head == elem) 1989 if (*head == elem)
… …
561 1994
562 head = &(*head)->next; 1995 head = &(*head)->next;
563 } 1996 }
564} 1997}
565 1998
566static void 1999void inline_speed
2000clear_pending (EV_P_ W w)
2001{
2002 if (w->pending)
2003 {
2004 pendings [ABSPRI (w)][w->pending - 1].w = 0;
2005 w->pending = 0;
2006 }
2007}
2008
2009int
2010ev_clear_pending (EV_P_ void *w)
2011{
2012 W w_ = (W)w;
2013 int pending = w_->pending;
2014
2015 if (expect_true (pending))
2016 {
2017 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2018 w_->pending = 0;
2019 p->w = 0;
2020 return p->events;
2021 }
2022 else
2023 return 0;
2024}
2025
2026void inline_size
2027pri_adjust (EV_P_ W w)
2028{
2029 int pri = w->priority;
2030 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2031 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2032 w->priority = pri;
2033}
2034
2035void inline_speed
567ev_start (W w, int active) 2036ev_start (EV_P_ W w, int active)
568{ 2037{
569 w->pending = 0; 2038 pri_adjust (EV_A_ w);
570 w->active = active; 2039 w->active = active;
2040 ev_ref (EV_A);
571} 2041}
572 2042
573static void 2043void inline_size
574ev_stop (W w) 2044ev_stop (EV_P_ W w)
575{ 2045{
576 if (w->pending) 2046 ev_unref (EV_A);
577 pendings [w->pending - 1].w = 0;
578
579 w->active = 0; 2047 w->active = 0;
580} 2048}
581 2049
582/*****************************************************************************/ 2050/*****************************************************************************/
583 2051
584void 2052void noinline
585evio_start (struct ev_io *w) 2053ev_io_start (EV_P_ ev_io *w)
586{ 2054{
2055 int fd = w->fd;
2056
2057 if (expect_false (ev_is_active (w)))
2058 return;
2059
2060 assert (("ev_io_start called with negative fd", fd >= 0));
2061
2062 EV_FREQUENT_CHECK;
2063
2064 ev_start (EV_A_ (W)w, 1);
2065 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
2066 wlist_add (&anfds[fd].head, (WL)w);
2067
2068 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
2069 w->events &= ~EV_IOFDSET;
2070
2071 EV_FREQUENT_CHECK;
2072}
2073
2074void noinline
2075ev_io_stop (EV_P_ ev_io *w)
2076{
2077 clear_pending (EV_A_ (W)w);
2078 if (expect_false (!ev_is_active (w)))
2079 return;
2080
2081 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2082
2083 EV_FREQUENT_CHECK;
2084
2085 wlist_del (&anfds[w->fd].head, (WL)w);
2086 ev_stop (EV_A_ (W)w);
2087
2088 fd_change (EV_A_ w->fd, 1);
2089
2090 EV_FREQUENT_CHECK;
2091}
2092
2093void noinline
2094ev_timer_start (EV_P_ ev_timer *w)
2095{
2096 if (expect_false (ev_is_active (w)))
2097 return;
2098
2099 ev_at (w) += mn_now;
2100
2101 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2102
2103 EV_FREQUENT_CHECK;
2104
2105 ++timercnt;
2106 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2107 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2108 ANHE_w (timers [ev_active (w)]) = (WT)w;
2109 ANHE_at_cache (timers [ev_active (w)]);
2110 upheap (timers, ev_active (w));
2111
2112 EV_FREQUENT_CHECK;
2113
2114 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2115}
2116
2117void noinline
2118ev_timer_stop (EV_P_ ev_timer *w)
2119{
2120 clear_pending (EV_A_ (W)w);
2121 if (expect_false (!ev_is_active (w)))
2122 return;
2123
2124 EV_FREQUENT_CHECK;
2125
2126 {
2127 int active = ev_active (w);
2128
2129 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2130
2131 --timercnt;
2132
2133 if (expect_true (active < timercnt + HEAP0))
2134 {
2135 timers [active] = timers [timercnt + HEAP0];
2136 adjustheap (timers, timercnt, active);
2137 }
2138 }
2139
2140 EV_FREQUENT_CHECK;
2141
2142 ev_at (w) -= mn_now;
2143
2144 ev_stop (EV_A_ (W)w);
2145}
2146
2147void noinline
2148ev_timer_again (EV_P_ ev_timer *w)
2149{
2150 EV_FREQUENT_CHECK;
2151
587 if (ev_is_active (w)) 2152 if (ev_is_active (w))
2153 {
2154 if (w->repeat)
2155 {
2156 ev_at (w) = mn_now + w->repeat;
2157 ANHE_at_cache (timers [ev_active (w)]);
2158 adjustheap (timers, timercnt, ev_active (w));
2159 }
2160 else
2161 ev_timer_stop (EV_A_ w);
2162 }
2163 else if (w->repeat)
2164 {
2165 ev_at (w) = w->repeat;
2166 ev_timer_start (EV_A_ w);
2167 }
2168
2169 EV_FREQUENT_CHECK;
2170}
2171
2172#if EV_PERIODIC_ENABLE
2173void noinline
2174ev_periodic_start (EV_P_ ev_periodic *w)
2175{
2176 if (expect_false (ev_is_active (w)))
588 return; 2177 return;
589 2178
590 int fd = w->fd; 2179 if (w->reschedule_cb)
2180 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2181 else if (w->interval)
2182 {
2183 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
2184 /* this formula differs from the one in periodic_reify because we do not always round up */
2185 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2186 }
2187 else
2188 ev_at (w) = w->offset;
591 2189
592 ev_start ((W)w, 1); 2190 EV_FREQUENT_CHECK;
593 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
594 wlist_add ((WL *)&anfds[fd].head, (WL)w);
595 2191
596 ++fdchangecnt; 2192 ++periodiccnt;
597 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 2193 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
598 fdchanges [fdchangecnt - 1] = fd; 2194 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
599} 2195 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2196 ANHE_at_cache (periodics [ev_active (w)]);
2197 upheap (periodics, ev_active (w));
600 2198
601void 2199 EV_FREQUENT_CHECK;
602evio_stop (struct ev_io *w) 2200
2201 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2202}
2203
2204void noinline
2205ev_periodic_stop (EV_P_ ev_periodic *w)
603{ 2206{
2207 clear_pending (EV_A_ (W)w);
604 if (!ev_is_active (w)) 2208 if (expect_false (!ev_is_active (w)))
605 return; 2209 return;
606 2210
607 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2211 EV_FREQUENT_CHECK;
2212
2213 {
2214 int active = ev_active (w);
2215
2216 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2217
2218 --periodiccnt;
2219
2220 if (expect_true (active < periodiccnt + HEAP0))
2221 {
2222 periodics [active] = periodics [periodiccnt + HEAP0];
2223 adjustheap (periodics, periodiccnt, active);
2224 }
2225 }
2226
2227 EV_FREQUENT_CHECK;
2228
608 ev_stop ((W)w); 2229 ev_stop (EV_A_ (W)w);
609
610 ++fdchangecnt;
611 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
612 fdchanges [fdchangecnt - 1] = w->fd;
613} 2230}
614 2231
615void 2232void noinline
616evtimer_start (struct ev_timer *w) 2233ev_periodic_again (EV_P_ ev_periodic *w)
617{ 2234{
2235 /* TODO: use adjustheap and recalculation */
2236 ev_periodic_stop (EV_A_ w);
2237 ev_periodic_start (EV_A_ w);
2238}
2239#endif
2240
2241#ifndef SA_RESTART
2242# define SA_RESTART 0
2243#endif
2244
2245void noinline
2246ev_signal_start (EV_P_ ev_signal *w)
2247{
2248#if EV_MULTIPLICITY
2249 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2250#endif
618 if (ev_is_active (w)) 2251 if (expect_false (ev_is_active (w)))
619 return; 2252 return;
620 2253
621 if (w->is_abs) 2254 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2255
2256 evpipe_init (EV_A);
2257
2258 EV_FREQUENT_CHECK;
2259
622 { 2260 {
623 /* this formula differs from the one in timer_reify becuse we do not round up */ 2261#ifndef _WIN32
624 if (w->repeat) 2262 sigset_t full, prev;
625 w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat; 2263 sigfillset (&full);
2264 sigprocmask (SIG_SETMASK, &full, &prev);
2265#endif
626 2266
627 ev_start ((W)w, ++atimercnt); 2267 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
628 array_needsize (atimers, atimermax, atimercnt, ); 2268
629 atimers [atimercnt - 1] = w; 2269#ifndef _WIN32
630 upheap (atimers, atimercnt - 1); 2270 sigprocmask (SIG_SETMASK, &prev, 0);
2271#endif
2272 }
2273
2274 ev_start (EV_A_ (W)w, 1);
2275 wlist_add (&signals [w->signum - 1].head, (WL)w);
2276
2277 if (!((WL)w)->next)
631 } 2278 {
632 else 2279#if _WIN32
2280 signal (w->signum, ev_sighandler);
2281#else
2282 struct sigaction sa;
2283 sa.sa_handler = ev_sighandler;
2284 sigfillset (&sa.sa_mask);
2285 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2286 sigaction (w->signum, &sa, 0);
2287#endif
633 { 2288 }
634 w->at += now;
635 2289
636 ev_start ((W)w, ++rtimercnt); 2290 EV_FREQUENT_CHECK;
637 array_needsize (rtimers, rtimermax, rtimercnt, );
638 rtimers [rtimercnt - 1] = w;
639 upheap (rtimers, rtimercnt - 1);
640 }
641
642} 2291}
643 2292
644void 2293void noinline
645evtimer_stop (struct ev_timer *w) 2294ev_signal_stop (EV_P_ ev_signal *w)
646{ 2295{
2296 clear_pending (EV_A_ (W)w);
647 if (!ev_is_active (w)) 2297 if (expect_false (!ev_is_active (w)))
648 return; 2298 return;
649 2299
650 if (w->is_abs) 2300 EV_FREQUENT_CHECK;
651 {
652 if (w->active < atimercnt--)
653 {
654 atimers [w->active - 1] = atimers [atimercnt];
655 downheap (atimers, atimercnt, w->active - 1);
656 }
657 }
658 else
659 {
660 if (w->active < rtimercnt--)
661 {
662 rtimers [w->active - 1] = rtimers [rtimercnt];
663 downheap (rtimers, rtimercnt, w->active - 1);
664 }
665 }
666 2301
667 ev_stop ((W)w);
668}
669
670void
671evsignal_start (struct ev_signal *w)
672{
673 if (ev_is_active (w))
674 return;
675
676 ev_start ((W)w, 1);
677 array_needsize (signals, signalmax, w->signum, signals_init);
678 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
679
680 if (!w->next)
681 {
682 struct sigaction sa;
683 sa.sa_handler = sighandler;
684 sigfillset (&sa.sa_mask);
685 sa.sa_flags = 0;
686 sigaction (w->signum, &sa, 0);
687 }
688}
689
690void
691evsignal_stop (struct ev_signal *w)
692{
693 if (!ev_is_active (w))
694 return;
695
696 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2302 wlist_del (&signals [w->signum - 1].head, (WL)w);
697 ev_stop ((W)w); 2303 ev_stop (EV_A_ (W)w);
698 2304
699 if (!signals [w->signum - 1].head) 2305 if (!signals [w->signum - 1].head)
700 signal (w->signum, SIG_DFL); 2306 signal (w->signum, SIG_DFL);
701}
702 2307
703void evidle_start (struct ev_idle *w) 2308 EV_FREQUENT_CHECK;
2309}
2310
2311void
2312ev_child_start (EV_P_ ev_child *w)
704{ 2313{
2314#if EV_MULTIPLICITY
2315 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2316#endif
705 if (ev_is_active (w)) 2317 if (expect_false (ev_is_active (w)))
706 return; 2318 return;
707 2319
708 ev_start ((W)w, ++idlecnt); 2320 EV_FREQUENT_CHECK;
709 array_needsize (idles, idlemax, idlecnt, );
710 idles [idlecnt - 1] = w;
711}
712 2321
713void evidle_stop (struct ev_idle *w) 2322 ev_start (EV_A_ (W)w, 1);
714{ 2323 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
715 idles [w->active - 1] = idles [--idlecnt];
716 ev_stop ((W)w);
717}
718 2324
719void evcheck_start (struct ev_check *w) 2325 EV_FREQUENT_CHECK;
2326}
2327
2328void
2329ev_child_stop (EV_P_ ev_child *w)
720{ 2330{
721 if (ev_is_active (w)) 2331 clear_pending (EV_A_ (W)w);
2332 if (expect_false (!ev_is_active (w)))
722 return; 2333 return;
723 2334
2335 EV_FREQUENT_CHECK;
2336
2337 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2338 ev_stop (EV_A_ (W)w);
2339
2340 EV_FREQUENT_CHECK;
2341}
2342
2343#if EV_STAT_ENABLE
2344
2345# ifdef _WIN32
2346# undef lstat
2347# define lstat(a,b) _stati64 (a,b)
2348# endif
2349
2350#define DEF_STAT_INTERVAL 5.0074891
2351#define MIN_STAT_INTERVAL 0.1074891
2352
2353static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2354
2355#if EV_USE_INOTIFY
2356# define EV_INOTIFY_BUFSIZE 8192
2357
2358static void noinline
2359infy_add (EV_P_ ev_stat *w)
2360{
2361 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);
2362
2363 if (w->wd < 0)
2364 {
2365 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2366
2367 /* monitor some parent directory for speedup hints */
2368 /* note that exceeding the hardcoded limit is not a correctness issue, */
2369 /* but an efficiency issue only */
2370 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2371 {
2372 char path [4096];
2373 strcpy (path, w->path);
2374
2375 do
2376 {
2377 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2378 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2379
2380 char *pend = strrchr (path, '/');
2381
2382 if (!pend)
2383 break; /* whoops, no '/', complain to your admin */
2384
2385 *pend = 0;
2386 w->wd = inotify_add_watch (fs_fd, path, mask);
2387 }
2388 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2389 }
2390 }
2391 else
2392 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2393
2394 if (w->wd >= 0)
2395 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2396}
2397
2398static void noinline
2399infy_del (EV_P_ ev_stat *w)
2400{
2401 int slot;
2402 int wd = w->wd;
2403
2404 if (wd < 0)
2405 return;
2406
2407 w->wd = -2;
2408 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2409 wlist_del (&fs_hash [slot].head, (WL)w);
2410
2411 /* remove this watcher, if others are watching it, they will rearm */
2412 inotify_rm_watch (fs_fd, wd);
2413}
2414
2415static void noinline
2416infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2417{
2418 if (slot < 0)
2419 /* overflow, need to check for all hahs slots */
2420 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2421 infy_wd (EV_A_ slot, wd, ev);
2422 else
2423 {
2424 WL w_;
2425
2426 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2427 {
2428 ev_stat *w = (ev_stat *)w_;
2429 w_ = w_->next; /* lets us remove this watcher and all before it */
2430
2431 if (w->wd == wd || wd == -1)
2432 {
2433 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2434 {
2435 w->wd = -1;
2436 infy_add (EV_A_ w); /* re-add, no matter what */
2437 }
2438
2439 stat_timer_cb (EV_A_ &w->timer, 0);
2440 }
2441 }
2442 }
2443}
2444
2445static void
2446infy_cb (EV_P_ ev_io *w, int revents)
2447{
2448 char buf [EV_INOTIFY_BUFSIZE];
2449 struct inotify_event *ev = (struct inotify_event *)buf;
2450 int ofs;
2451 int len = read (fs_fd, buf, sizeof (buf));
2452
2453 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2454 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2455}
2456
2457void inline_size
2458infy_init (EV_P)
2459{
2460 if (fs_fd != -2)
2461 return;
2462
2463 fs_fd = inotify_init ();
2464
2465 if (fs_fd >= 0)
2466 {
2467 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2468 ev_set_priority (&fs_w, EV_MAXPRI);
2469 ev_io_start (EV_A_ &fs_w);
2470 }
2471}
2472
2473void inline_size
2474infy_fork (EV_P)
2475{
2476 int slot;
2477
2478 if (fs_fd < 0)
2479 return;
2480
2481 close (fs_fd);
2482 fs_fd = inotify_init ();
2483
2484 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2485 {
2486 WL w_ = fs_hash [slot].head;
2487 fs_hash [slot].head = 0;
2488
2489 while (w_)
2490 {
2491 ev_stat *w = (ev_stat *)w_;
2492 w_ = w_->next; /* lets us add this watcher */
2493
2494 w->wd = -1;
2495
2496 if (fs_fd >= 0)
2497 infy_add (EV_A_ w); /* re-add, no matter what */
2498 else
2499 ev_timer_start (EV_A_ &w->timer);
2500 }
2501
2502 }
2503}
2504
2505#endif
2506
2507void
2508ev_stat_stat (EV_P_ ev_stat *w)
2509{
2510 if (lstat (w->path, &w->attr) < 0)
2511 w->attr.st_nlink = 0;
2512 else if (!w->attr.st_nlink)
2513 w->attr.st_nlink = 1;
2514}
2515
2516static void noinline
2517stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2518{
2519 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2520
2521 /* we copy this here each the time so that */
2522 /* prev has the old value when the callback gets invoked */
2523 w->prev = w->attr;
2524 ev_stat_stat (EV_A_ w);
2525
2526 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2527 if (
2528 w->prev.st_dev != w->attr.st_dev
2529 || w->prev.st_ino != w->attr.st_ino
2530 || w->prev.st_mode != w->attr.st_mode
2531 || w->prev.st_nlink != w->attr.st_nlink
2532 || w->prev.st_uid != w->attr.st_uid
2533 || w->prev.st_gid != w->attr.st_gid
2534 || w->prev.st_rdev != w->attr.st_rdev
2535 || w->prev.st_size != w->attr.st_size
2536 || w->prev.st_atime != w->attr.st_atime
2537 || w->prev.st_mtime != w->attr.st_mtime
2538 || w->prev.st_ctime != w->attr.st_ctime
2539 ) {
2540 #if EV_USE_INOTIFY
2541 infy_del (EV_A_ w);
2542 infy_add (EV_A_ w);
2543 ev_stat_stat (EV_A_ w); /* avoid race... */
2544 #endif
2545
2546 ev_feed_event (EV_A_ w, EV_STAT);
2547 }
2548}
2549
2550void
2551ev_stat_start (EV_P_ ev_stat *w)
2552{
2553 if (expect_false (ev_is_active (w)))
2554 return;
2555
2556 /* since we use memcmp, we need to clear any padding data etc. */
2557 memset (&w->prev, 0, sizeof (ev_statdata));
2558 memset (&w->attr, 0, sizeof (ev_statdata));
2559
2560 ev_stat_stat (EV_A_ w);
2561
2562 if (w->interval < MIN_STAT_INTERVAL)
2563 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2564
2565 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2566 ev_set_priority (&w->timer, ev_priority (w));
2567
2568#if EV_USE_INOTIFY
2569 infy_init (EV_A);
2570
2571 if (fs_fd >= 0)
2572 infy_add (EV_A_ w);
2573 else
2574#endif
2575 ev_timer_start (EV_A_ &w->timer);
2576
2577 ev_start (EV_A_ (W)w, 1);
2578
2579 EV_FREQUENT_CHECK;
2580}
2581
2582void
2583ev_stat_stop (EV_P_ ev_stat *w)
2584{
2585 clear_pending (EV_A_ (W)w);
2586 if (expect_false (!ev_is_active (w)))
2587 return;
2588
2589 EV_FREQUENT_CHECK;
2590
2591#if EV_USE_INOTIFY
2592 infy_del (EV_A_ w);
2593#endif
2594 ev_timer_stop (EV_A_ &w->timer);
2595
2596 ev_stop (EV_A_ (W)w);
2597
2598 EV_FREQUENT_CHECK;
2599}
2600#endif
2601
2602#if EV_IDLE_ENABLE
2603void
2604ev_idle_start (EV_P_ ev_idle *w)
2605{
2606 if (expect_false (ev_is_active (w)))
2607 return;
2608
2609 pri_adjust (EV_A_ (W)w);
2610
2611 EV_FREQUENT_CHECK;
2612
2613 {
2614 int active = ++idlecnt [ABSPRI (w)];
2615
2616 ++idleall;
2617 ev_start (EV_A_ (W)w, active);
2618
2619 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2620 idles [ABSPRI (w)][active - 1] = w;
2621 }
2622
2623 EV_FREQUENT_CHECK;
2624}
2625
2626void
2627ev_idle_stop (EV_P_ ev_idle *w)
2628{
2629 clear_pending (EV_A_ (W)w);
2630 if (expect_false (!ev_is_active (w)))
2631 return;
2632
2633 EV_FREQUENT_CHECK;
2634
2635 {
2636 int active = ev_active (w);
2637
2638 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2639 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2640
2641 ev_stop (EV_A_ (W)w);
2642 --idleall;
2643 }
2644
2645 EV_FREQUENT_CHECK;
2646}
2647#endif
2648
2649void
2650ev_prepare_start (EV_P_ ev_prepare *w)
2651{
2652 if (expect_false (ev_is_active (w)))
2653 return;
2654
2655 EV_FREQUENT_CHECK;
2656
2657 ev_start (EV_A_ (W)w, ++preparecnt);
2658 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2659 prepares [preparecnt - 1] = w;
2660
2661 EV_FREQUENT_CHECK;
2662}
2663
2664void
2665ev_prepare_stop (EV_P_ ev_prepare *w)
2666{
2667 clear_pending (EV_A_ (W)w);
2668 if (expect_false (!ev_is_active (w)))
2669 return;
2670
2671 EV_FREQUENT_CHECK;
2672
2673 {
2674 int active = ev_active (w);
2675
2676 prepares [active - 1] = prepares [--preparecnt];
2677 ev_active (prepares [active - 1]) = active;
2678 }
2679
2680 ev_stop (EV_A_ (W)w);
2681
2682 EV_FREQUENT_CHECK;
2683}
2684
2685void
2686ev_check_start (EV_P_ ev_check *w)
2687{
2688 if (expect_false (ev_is_active (w)))
2689 return;
2690
2691 EV_FREQUENT_CHECK;
2692
724 ev_start ((W)w, ++checkcnt); 2693 ev_start (EV_A_ (W)w, ++checkcnt);
725 array_needsize (checks, checkmax, checkcnt, ); 2694 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
726 checks [checkcnt - 1] = w; 2695 checks [checkcnt - 1] = w;
727}
728 2696
2697 EV_FREQUENT_CHECK;
2698}
2699
2700void
729void evcheck_stop (struct ev_check *w) 2701ev_check_stop (EV_P_ ev_check *w)
730{ 2702{
2703 clear_pending (EV_A_ (W)w);
2704 if (expect_false (!ev_is_active (w)))
2705 return;
2706
2707 EV_FREQUENT_CHECK;
2708
2709 {
2710 int active = ev_active (w);
2711
731 checks [w->active - 1] = checks [--checkcnt]; 2712 checks [active - 1] = checks [--checkcnt];
2713 ev_active (checks [active - 1]) = active;
2714 }
2715
732 ev_stop ((W)w); 2716 ev_stop (EV_A_ (W)w);
2717
2718 EV_FREQUENT_CHECK;
733} 2719}
2720
2721#if EV_EMBED_ENABLE
2722void noinline
2723ev_embed_sweep (EV_P_ ev_embed *w)
2724{
2725 ev_loop (w->other, EVLOOP_NONBLOCK);
2726}
2727
2728static void
2729embed_io_cb (EV_P_ ev_io *io, int revents)
2730{
2731 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2732
2733 if (ev_cb (w))
2734 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2735 else
2736 ev_loop (w->other, EVLOOP_NONBLOCK);
2737}
2738
2739static void
2740embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2741{
2742 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2743
2744 {
2745 struct ev_loop *loop = w->other;
2746
2747 while (fdchangecnt)
2748 {
2749 fd_reify (EV_A);
2750 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2751 }
2752 }
2753}
2754
2755#if 0
2756static void
2757embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2758{
2759 ev_idle_stop (EV_A_ idle);
2760}
2761#endif
2762
2763void
2764ev_embed_start (EV_P_ ev_embed *w)
2765{
2766 if (expect_false (ev_is_active (w)))
2767 return;
2768
2769 {
2770 struct ev_loop *loop = w->other;
2771 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2772 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2773 }
2774
2775 EV_FREQUENT_CHECK;
2776
2777 ev_set_priority (&w->io, ev_priority (w));
2778 ev_io_start (EV_A_ &w->io);
2779
2780 ev_prepare_init (&w->prepare, embed_prepare_cb);
2781 ev_set_priority (&w->prepare, EV_MINPRI);
2782 ev_prepare_start (EV_A_ &w->prepare);
2783
2784 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2785
2786 ev_start (EV_A_ (W)w, 1);
2787
2788 EV_FREQUENT_CHECK;
2789}
2790
2791void
2792ev_embed_stop (EV_P_ ev_embed *w)
2793{
2794 clear_pending (EV_A_ (W)w);
2795 if (expect_false (!ev_is_active (w)))
2796 return;
2797
2798 EV_FREQUENT_CHECK;
2799
2800 ev_io_stop (EV_A_ &w->io);
2801 ev_prepare_stop (EV_A_ &w->prepare);
2802
2803 ev_stop (EV_A_ (W)w);
2804
2805 EV_FREQUENT_CHECK;
2806}
2807#endif
2808
2809#if EV_FORK_ENABLE
2810void
2811ev_fork_start (EV_P_ ev_fork *w)
2812{
2813 if (expect_false (ev_is_active (w)))
2814 return;
2815
2816 EV_FREQUENT_CHECK;
2817
2818 ev_start (EV_A_ (W)w, ++forkcnt);
2819 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2820 forks [forkcnt - 1] = w;
2821
2822 EV_FREQUENT_CHECK;
2823}
2824
2825void
2826ev_fork_stop (EV_P_ ev_fork *w)
2827{
2828 clear_pending (EV_A_ (W)w);
2829 if (expect_false (!ev_is_active (w)))
2830 return;
2831
2832 EV_FREQUENT_CHECK;
2833
2834 {
2835 int active = ev_active (w);
2836
2837 forks [active - 1] = forks [--forkcnt];
2838 ev_active (forks [active - 1]) = active;
2839 }
2840
2841 ev_stop (EV_A_ (W)w);
2842
2843 EV_FREQUENT_CHECK;
2844}
2845#endif
2846
2847#if EV_ASYNC_ENABLE
2848void
2849ev_async_start (EV_P_ ev_async *w)
2850{
2851 if (expect_false (ev_is_active (w)))
2852 return;
2853
2854 evpipe_init (EV_A);
2855
2856 EV_FREQUENT_CHECK;
2857
2858 ev_start (EV_A_ (W)w, ++asynccnt);
2859 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2860 asyncs [asynccnt - 1] = w;
2861
2862 EV_FREQUENT_CHECK;
2863}
2864
2865void
2866ev_async_stop (EV_P_ ev_async *w)
2867{
2868 clear_pending (EV_A_ (W)w);
2869 if (expect_false (!ev_is_active (w)))
2870 return;
2871
2872 EV_FREQUENT_CHECK;
2873
2874 {
2875 int active = ev_active (w);
2876
2877 asyncs [active - 1] = asyncs [--asynccnt];
2878 ev_active (asyncs [active - 1]) = active;
2879 }
2880
2881 ev_stop (EV_A_ (W)w);
2882
2883 EV_FREQUENT_CHECK;
2884}
2885
2886void
2887ev_async_send (EV_P_ ev_async *w)
2888{
2889 w->sent = 1;
2890 evpipe_write (EV_A_ &gotasync);
2891}
2892#endif
734 2893
735/*****************************************************************************/ 2894/*****************************************************************************/
736 2895
737#if 0 2896struct ev_once
2897{
2898 ev_io io;
2899 ev_timer to;
2900 void (*cb)(int revents, void *arg);
2901 void *arg;
2902};
738 2903
739static void 2904static void
740sin_cb (struct ev_io *w, int revents) 2905once_cb (EV_P_ struct ev_once *once, int revents)
741{ 2906{
742 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 2907 void (*cb)(int revents, void *arg) = once->cb;
2908 void *arg = once->arg;
2909
2910 ev_io_stop (EV_A_ &once->io);
2911 ev_timer_stop (EV_A_ &once->to);
2912 ev_free (once);
2913
2914 cb (revents, arg);
743} 2915}
744 2916
745static void 2917static void
746ocb (struct ev_timer *w, int revents) 2918once_cb_io (EV_P_ ev_io *w, int revents)
747{ 2919{
748 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 2920 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
749 evtimer_stop (w);
750 evtimer_start (w);
751} 2921}
752 2922
753static void 2923static void
754scb (struct ev_signal *w, int revents) 2924once_cb_to (EV_P_ ev_timer *w, int revents)
755{ 2925{
756 fprintf (stderr, "signal %x,%d\n", revents, w->signum); 2926 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
757} 2927}
758 2928
759static void 2929void
760gcb (struct ev_signal *w, int revents) 2930ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
761{ 2931{
762 fprintf (stderr, "generic %x\n", revents); 2932 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
763}
764 2933
765int main (void) 2934 if (expect_false (!once))
766{
767 struct ev_io sin;
768
769 ev_init (0);
770
771 evw_init (&sin, sin_cb, 55);
772 evio_set (&sin, 0, EV_READ);
773 evio_start (&sin);
774
775 struct ev_timer t[10000];
776
777#if 0
778 int i;
779 for (i = 0; i < 10000; ++i)
780 {
781 struct ev_timer *w = t + i;
782 evw_init (w, ocb, i);
783 evtimer_set_abs (w, drand48 (), 0.99775533);
784 evtimer_start (w);
785 if (drand48 () < 0.5)
786 evtimer_stop (w);
787 } 2935 {
788#endif 2936 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
789
790 struct ev_timer t1;
791 evw_init (&t1, ocb, 0);
792 evtimer_set_abs (&t1, 5, 10);
793 evtimer_start (&t1);
794
795 struct ev_signal sig;
796 evw_init (&sig, scb, 65535);
797 evsignal_set (&sig, SIGQUIT);
798 evsignal_start (&sig);
799
800 struct ev_check cw;
801 evw_init (&cw, gcb, 0);
802 evcheck_start (&cw);
803
804 struct ev_idle iw;
805 evw_init (&iw, gcb, 0);
806 evidle_start (&iw);
807
808 ev_loop (0);
809
810 return 0; 2937 return;
811} 2938 }
812 2939
813#endif 2940 once->cb = cb;
2941 once->arg = arg;
814 2942
2943 ev_init (&once->io, once_cb_io);
2944 if (fd >= 0)
2945 {
2946 ev_io_set (&once->io, fd, events);
2947 ev_io_start (EV_A_ &once->io);
2948 }
815 2949
2950 ev_init (&once->to, once_cb_to);
2951 if (timeout >= 0.)
2952 {
2953 ev_timer_set (&once->to, timeout, 0.);
2954 ev_timer_start (EV_A_ &once->to);
2955 }
2956}
816 2957
2958#if EV_MULTIPLICITY
2959 #include "ev_wrap.h"
2960#endif
817 2961
2962#ifdef __cplusplus
2963}
2964#endif
2965

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