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Comparing libev/ev.c (file contents):
Revision 1.1 by root, Tue Oct 30 20:59:31 2007 UTC vs.
Revision 1.279 by root, Fri Feb 6 20:17:43 2009 UTC

1/*
2 * libev event processing core, watcher management
3 *
4 * Copyright (c) 2007,2008,2009 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_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 0
57# endif
58# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1
60# endif
61# endif
62# endif
63
64# if HAVE_CLOCK_GETTIME
65# ifndef EV_USE_MONOTONIC
66# define EV_USE_MONOTONIC 1
67# endif
68# ifndef EV_USE_REALTIME
69# define EV_USE_REALTIME 0
70# endif
71# else
72# ifndef EV_USE_MONOTONIC
73# define EV_USE_MONOTONIC 0
74# endif
75# ifndef EV_USE_REALTIME
76# define EV_USE_REALTIME 0
77# endif
78# endif
79
80# ifndef EV_USE_NANOSLEEP
81# if HAVE_NANOSLEEP
82# define EV_USE_NANOSLEEP 1
83# else
84# define EV_USE_NANOSLEEP 0
85# endif
86# endif
87
88# ifndef EV_USE_SELECT
89# if HAVE_SELECT && HAVE_SYS_SELECT_H
90# define EV_USE_SELECT 1
91# else
92# define EV_USE_SELECT 0
93# endif
94# endif
95
96# ifndef EV_USE_POLL
97# if HAVE_POLL && HAVE_POLL_H
98# define EV_USE_POLL 1
99# else
100# define EV_USE_POLL 0
101# endif
102# endif
103
104# ifndef EV_USE_EPOLL
105# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
106# define EV_USE_EPOLL 1
107# else
108# define EV_USE_EPOLL 0
109# endif
110# endif
111
112# ifndef EV_USE_KQUEUE
113# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
114# define EV_USE_KQUEUE 1
115# else
116# define EV_USE_KQUEUE 0
117# endif
118# endif
119
120# ifndef EV_USE_PORT
121# if HAVE_PORT_H && HAVE_PORT_CREATE
122# define EV_USE_PORT 1
123# else
124# define EV_USE_PORT 0
125# endif
126# endif
127
128# ifndef EV_USE_INOTIFY
129# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
130# define EV_USE_INOTIFY 1
131# else
132# define EV_USE_INOTIFY 0
133# endif
134# endif
135
136# ifndef EV_USE_EVENTFD
137# if HAVE_EVENTFD
138# define EV_USE_EVENTFD 1
139# else
140# define EV_USE_EVENTFD 0
141# endif
142# endif
143
144#endif
145
1#include <math.h> 146#include <math.h>
2#include <stdlib.h> 147#include <stdlib.h>
148#include <fcntl.h>
149#include <stddef.h>
3 150
4#include <stdio.h> 151#include <stdio.h>
5 152
153#include <assert.h>
6#include <errno.h> 154#include <errno.h>
7#include <sys/time.h> 155#include <sys/types.h>
8#include <time.h> 156#include <time.h>
9 157
158#include <signal.h>
159
160#ifdef EV_H
161# include EV_H
162#else
163# include "ev.h"
164#endif
165
166#ifndef _WIN32
167# include <sys/time.h>
168# include <sys/wait.h>
169# include <unistd.h>
170#else
171# include <io.h>
172# define WIN32_LEAN_AND_MEAN
173# include <windows.h>
174# ifndef EV_SELECT_IS_WINSOCKET
175# define EV_SELECT_IS_WINSOCKET 1
176# endif
177#endif
178
179/* this block tries to deduce configuration from header-defined symbols and defaults */
180
181#ifndef EV_USE_CLOCK_SYSCALL
182# if __linux && __GLIBC__ >= 2
183# define EV_USE_CLOCK_SYSCALL 1
184# else
185# define EV_USE_CLOCK_SYSCALL 0
186# endif
187#endif
188
189#ifndef EV_USE_MONOTONIC
190# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
191# define EV_USE_MONOTONIC 1
192# else
193# define EV_USE_MONOTONIC 0
194# endif
195#endif
196
197#ifndef EV_USE_REALTIME
198# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
199#endif
200
201#ifndef EV_USE_NANOSLEEP
202# if _POSIX_C_SOURCE >= 199309L
203# define EV_USE_NANOSLEEP 1
204# else
205# define EV_USE_NANOSLEEP 0
206# endif
207#endif
208
209#ifndef EV_USE_SELECT
210# define EV_USE_SELECT 1
211#endif
212
213#ifndef EV_USE_POLL
214# ifdef _WIN32
215# define EV_USE_POLL 0
216# else
217# define EV_USE_POLL 1
218# endif
219#endif
220
221#ifndef EV_USE_EPOLL
222# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
223# define EV_USE_EPOLL 1
224# else
225# define EV_USE_EPOLL 0
226# endif
227#endif
228
229#ifndef EV_USE_KQUEUE
230# define EV_USE_KQUEUE 0
231#endif
232
233#ifndef EV_USE_PORT
234# define EV_USE_PORT 0
235#endif
236
237#ifndef EV_USE_INOTIFY
238# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
239# define EV_USE_INOTIFY 1
240# else
241# define EV_USE_INOTIFY 0
242# endif
243#endif
244
245#ifndef EV_PID_HASHSIZE
246# if EV_MINIMAL
247# define EV_PID_HASHSIZE 1
248# else
249# define EV_PID_HASHSIZE 16
250# endif
251#endif
252
253#ifndef EV_INOTIFY_HASHSIZE
254# if EV_MINIMAL
255# define EV_INOTIFY_HASHSIZE 1
256# else
257# define EV_INOTIFY_HASHSIZE 16
258# endif
259#endif
260
261#ifndef EV_USE_EVENTFD
262# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
263# define EV_USE_EVENTFD 1
264# else
265# define EV_USE_EVENTFD 0
266# endif
267#endif
268
269#if 0 /* debugging */
270# define EV_VERIFY 3
271# define EV_USE_4HEAP 1
272# define EV_HEAP_CACHE_AT 1
273#endif
274
275#ifndef EV_VERIFY
276# define EV_VERIFY !EV_MINIMAL
277#endif
278
279#ifndef EV_USE_4HEAP
280# define EV_USE_4HEAP !EV_MINIMAL
281#endif
282
283#ifndef EV_HEAP_CACHE_AT
284# define EV_HEAP_CACHE_AT !EV_MINIMAL
285#endif
286
287/* this block fixes any misconfiguration where we know we run into trouble otherwise */
288
10#ifdef CLOCK_MONOTONIC 289#ifndef CLOCK_MONOTONIC
290# undef EV_USE_MONOTONIC
11# define HAVE_MONOTONIC 1 291# define EV_USE_MONOTONIC 0
292#endif
293
294#ifndef CLOCK_REALTIME
295# undef EV_USE_REALTIME
296# define EV_USE_REALTIME 0
297#endif
298
299#if !EV_STAT_ENABLE
300# undef EV_USE_INOTIFY
301# define EV_USE_INOTIFY 0
302#endif
303
304#if !EV_USE_NANOSLEEP
305# ifndef _WIN32
306# include <sys/select.h>
12#endif 307# endif
308#endif
13 309
14#define HAVE_EPOLL 1 310#if EV_USE_INOTIFY
15#define HAVE_REALTIME 1 311# include <sys/utsname.h>
16#define HAVE_SELECT 0 312# include <sys/statfs.h>
313# include <sys/inotify.h>
314/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
315# ifndef IN_DONT_FOLLOW
316# undef EV_USE_INOTIFY
317# define EV_USE_INOTIFY 0
318# endif
319#endif
17 320
18#define MAX_BLOCKTIME 60. 321#if EV_SELECT_IS_WINSOCKET
322# include <winsock.h>
323#endif
19 324
325/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
326/* which makes programs even slower. might work on other unices, too. */
327#if EV_USE_CLOCK_SYSCALL
328# include <syscall.h>
329# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
330# undef EV_USE_MONOTONIC
331# define EV_USE_MONOTONIC 1
332#endif
333
334#if EV_USE_EVENTFD
335/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
336# include <stdint.h>
337# ifdef __cplusplus
338extern "C" {
339# endif
340int eventfd (unsigned int initval, int flags);
341# ifdef __cplusplus
342}
343# endif
344#endif
345
346/**/
347
348#if EV_VERIFY >= 3
349# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
350#else
351# define EV_FREQUENT_CHECK do { } while (0)
352#endif
353
354/*
355 * This is used to avoid floating point rounding problems.
356 * It is added to ev_rt_now when scheduling periodics
357 * to ensure progress, time-wise, even when rounding
358 * errors are against us.
359 * This value is good at least till the year 4000.
360 * Better solutions welcome.
361 */
362#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
363
364#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
365#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
366/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
367
368#if __GNUC__ >= 4
369# define expect(expr,value) __builtin_expect ((expr),(value))
370# define noinline __attribute__ ((noinline))
371#else
372# define expect(expr,value) (expr)
373# define noinline
374# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
375# define inline
376# endif
377#endif
378
379#define expect_false(expr) expect ((expr) != 0, 0)
380#define expect_true(expr) expect ((expr) != 0, 1)
381#define inline_size static inline
382
383#if EV_MINIMAL
384# define inline_speed static noinline
385#else
386# define inline_speed static inline
387#endif
388
389#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
390#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
391
392#define EMPTY /* required for microsofts broken pseudo-c compiler */
393#define EMPTY2(a,b) /* used to suppress some warnings */
394
395typedef ev_watcher *W;
396typedef ev_watcher_list *WL;
397typedef ev_watcher_time *WT;
398
399#define ev_active(w) ((W)(w))->active
400#define ev_at(w) ((WT)(w))->at
401
402#if EV_USE_REALTIME
403/* sig_atomic_t is used to avoid per-thread variables or locking but still */
404/* giving it a reasonably high chance of working on typical architetcures */
405static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
406#endif
407
408#if EV_USE_MONOTONIC
409static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
410#endif
411
412#ifdef _WIN32
413# include "ev_win32.c"
414#endif
415
416/*****************************************************************************/
417
418static void (*syserr_cb)(const char *msg);
419
420void
421ev_set_syserr_cb (void (*cb)(const char *msg))
422{
423 syserr_cb = cb;
424}
425
426static void noinline
427ev_syserr (const char *msg)
428{
429 if (!msg)
430 msg = "(libev) system error";
431
432 if (syserr_cb)
433 syserr_cb (msg);
434 else
435 {
436 perror (msg);
437 abort ();
438 }
439}
440
441static void *
442ev_realloc_emul (void *ptr, long size)
443{
444 /* some systems, notably openbsd and darwin, fail to properly
445 * implement realloc (x, 0) (as required by both ansi c-98 and
446 * the single unix specification, so work around them here.
447 */
448
449 if (size)
450 return realloc (ptr, size);
451
452 free (ptr);
453 return 0;
454}
455
456static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
457
458void
459ev_set_allocator (void *(*cb)(void *ptr, long size))
460{
461 alloc = cb;
462}
463
464inline_speed void *
465ev_realloc (void *ptr, long size)
466{
467 ptr = alloc (ptr, size);
468
469 if (!ptr && size)
470 {
471 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
472 abort ();
473 }
474
475 return ptr;
476}
477
478#define ev_malloc(size) ev_realloc (0, (size))
479#define ev_free(ptr) ev_realloc ((ptr), 0)
480
481/*****************************************************************************/
482
483typedef struct
484{
485 WL head;
486 unsigned char events;
487 unsigned char reify;
488 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
489 unsigned char unused;
490#if EV_USE_EPOLL
491 unsigned int egen; /* generation counter to counter epoll bugs */
492#endif
493#if EV_SELECT_IS_WINSOCKET
494 SOCKET handle;
495#endif
496} ANFD;
497
498typedef struct
499{
500 W w;
501 int events;
502} ANPENDING;
503
504#if EV_USE_INOTIFY
505/* hash table entry per inotify-id */
506typedef struct
507{
508 WL head;
509} ANFS;
510#endif
511
512/* Heap Entry */
513#if EV_HEAP_CACHE_AT
514 typedef struct {
515 ev_tstamp at;
516 WT w;
517 } ANHE;
518
519 #define ANHE_w(he) (he).w /* access watcher, read-write */
520 #define ANHE_at(he) (he).at /* access cached at, read-only */
521 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
522#else
523 typedef WT ANHE;
524
525 #define ANHE_w(he) (he)
526 #define ANHE_at(he) (he)->at
527 #define ANHE_at_cache(he)
528#endif
529
530#if EV_MULTIPLICITY
531
532 struct ev_loop
533 {
534 ev_tstamp ev_rt_now;
535 #define ev_rt_now ((loop)->ev_rt_now)
536 #define VAR(name,decl) decl;
537 #include "ev_vars.h"
538 #undef VAR
539 };
20#include "ev.h" 540 #include "ev_wrap.h"
21 541
22struct ev_watcher { 542 static struct ev_loop default_loop_struct;
23 EV_WATCHER (ev_watcher); 543 struct ev_loop *ev_default_loop_ptr;
24};
25 544
26struct ev_watcher_list { 545#else
27 EV_WATCHER_LIST (ev_watcher_list);
28};
29 546
30ev_tstamp ev_now; 547 ev_tstamp ev_rt_now;
31int ev_method; 548 #define VAR(name,decl) static decl;
549 #include "ev_vars.h"
550 #undef VAR
32 551
33static int have_monotonic; /* runtime */ 552 static int ev_default_loop_ptr;
34 553
35static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 554#endif
36static void (*method_reify)(void); 555
37static void (*method_poll)(ev_tstamp timeout); 556/*****************************************************************************/
38 557
39ev_tstamp 558ev_tstamp
40ev_time (void) 559ev_time (void)
41{ 560{
42#if HAVE_REALTIME 561#if EV_USE_REALTIME
562 if (expect_true (have_realtime))
563 {
43 struct timespec ts; 564 struct timespec ts;
44 clock_gettime (CLOCK_REALTIME, &ts); 565 clock_gettime (CLOCK_REALTIME, &ts);
45 return ts.tv_sec + ts.tv_nsec * 1e-9; 566 return ts.tv_sec + ts.tv_nsec * 1e-9;
46#else 567 }
568#endif
569
47 struct timeval tv; 570 struct timeval tv;
48 gettimeofday (&tv, 0); 571 gettimeofday (&tv, 0);
49 return tv.tv_sec + tv.tv_usec * 1e-6; 572 return tv.tv_sec + tv.tv_usec * 1e-6;
50#endif
51} 573}
52 574
53static ev_tstamp 575ev_tstamp inline_size
54get_clock (void) 576get_clock (void)
55{ 577{
56#if HAVE_MONOTONIC 578#if EV_USE_MONOTONIC
57 if (have_monotonic) 579 if (expect_true (have_monotonic))
58 { 580 {
59 struct timespec ts; 581 struct timespec ts;
60 clock_gettime (CLOCK_MONOTONIC, &ts); 582 clock_gettime (CLOCK_MONOTONIC, &ts);
61 return ts.tv_sec + ts.tv_nsec * 1e-9; 583 return ts.tv_sec + ts.tv_nsec * 1e-9;
62 } 584 }
63#endif 585#endif
64 586
65 return ev_time (); 587 return ev_time ();
66} 588}
67 589
590#if EV_MULTIPLICITY
591ev_tstamp
592ev_now (EV_P)
593{
594 return ev_rt_now;
595}
596#endif
597
598void
599ev_sleep (ev_tstamp delay)
600{
601 if (delay > 0.)
602 {
603#if EV_USE_NANOSLEEP
604 struct timespec ts;
605
606 ts.tv_sec = (time_t)delay;
607 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
608
609 nanosleep (&ts, 0);
610#elif defined(_WIN32)
611 Sleep ((unsigned long)(delay * 1e3));
612#else
613 struct timeval tv;
614
615 tv.tv_sec = (time_t)delay;
616 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
617
618 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
619 /* somehting nto guaranteed by newer posix versions, but guaranteed */
620 /* by older ones */
621 select (0, 0, 0, 0, &tv);
622#endif
623 }
624}
625
626/*****************************************************************************/
627
628#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
629
630int inline_size
631array_nextsize (int elem, int cur, int cnt)
632{
633 int ncur = cur + 1;
634
635 do
636 ncur <<= 1;
637 while (cnt > ncur);
638
639 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
640 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
641 {
642 ncur *= elem;
643 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
644 ncur = ncur - sizeof (void *) * 4;
645 ncur /= elem;
646 }
647
648 return ncur;
649}
650
651static noinline void *
652array_realloc (int elem, void *base, int *cur, int cnt)
653{
654 *cur = array_nextsize (elem, *cur, cnt);
655 return ev_realloc (base, elem * *cur);
656}
657
658#define array_init_zero(base,count) \
659 memset ((void *)(base), 0, sizeof (*(base)) * (count))
660
68#define array_needsize(base,cur,cnt,init) \ 661#define array_needsize(type,base,cur,cnt,init) \
69 if ((cnt) > cur) \ 662 if (expect_false ((cnt) > (cur))) \
70 { \ 663 { \
71 int newcnt = cur; \ 664 int ocur_ = (cur); \
72 do \ 665 (base) = (type *)array_realloc \
666 (sizeof (type), (base), &(cur), (cnt)); \
667 init ((base) + (ocur_), (cur) - ocur_); \
668 }
669
670#if 0
671#define array_slim(type,stem) \
672 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
73 { \ 673 { \
74 newcnt += (newcnt >> 1) + 16; \ 674 stem ## max = array_roundsize (stem ## cnt >> 1); \
75 } \ 675 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
76 while ((cnt) > newcnt); \ 676 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
77 fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\ 677 }
78 base = realloc (base, sizeof (*base) * (newcnt)); \ 678#endif
79 init (base + cur, newcnt - cur); \ 679
80 cur = newcnt; \ 680#define array_free(stem, idx) \
681 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
682
683/*****************************************************************************/
684
685void noinline
686ev_feed_event (EV_P_ void *w, int revents)
687{
688 W w_ = (W)w;
689 int pri = ABSPRI (w_);
690
691 if (expect_false (w_->pending))
692 pendings [pri][w_->pending - 1].events |= revents;
693 else
694 {
695 w_->pending = ++pendingcnt [pri];
696 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
697 pendings [pri][w_->pending - 1].w = w_;
698 pendings [pri][w_->pending - 1].events = revents;
699 }
700}
701
702void inline_speed
703queue_events (EV_P_ W *events, int eventcnt, int type)
704{
705 int i;
706
707 for (i = 0; i < eventcnt; ++i)
708 ev_feed_event (EV_A_ events [i], type);
709}
710
711/*****************************************************************************/
712
713void inline_speed
714fd_event (EV_P_ int fd, int revents)
715{
716 ANFD *anfd = anfds + fd;
717 ev_io *w;
718
719 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
720 {
721 int ev = w->events & revents;
722
723 if (ev)
724 ev_feed_event (EV_A_ (W)w, ev);
725 }
726}
727
728void
729ev_feed_fd_event (EV_P_ int fd, int revents)
730{
731 if (fd >= 0 && fd < anfdmax)
732 fd_event (EV_A_ fd, revents);
733}
734
735void inline_size
736fd_reify (EV_P)
737{
738 int i;
739
740 for (i = 0; i < fdchangecnt; ++i)
741 {
742 int fd = fdchanges [i];
743 ANFD *anfd = anfds + fd;
744 ev_io *w;
745
746 unsigned char events = 0;
747
748 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
749 events |= (unsigned char)w->events;
750
751#if EV_SELECT_IS_WINSOCKET
752 if (events)
753 {
754 unsigned long arg;
755 #ifdef EV_FD_TO_WIN32_HANDLE
756 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
757 #else
758 anfd->handle = _get_osfhandle (fd);
759 #endif
760 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
761 }
762#endif
763
764 {
765 unsigned char o_events = anfd->events;
766 unsigned char o_reify = anfd->reify;
767
768 anfd->reify = 0;
769 anfd->events = events;
770
771 if (o_events != events || o_reify & EV_IOFDSET)
772 backend_modify (EV_A_ fd, o_events, events);
81 } 773 }
774 }
775
776 fdchangecnt = 0;
777}
778
779void inline_size
780fd_change (EV_P_ int fd, int flags)
781{
782 unsigned char reify = anfds [fd].reify;
783 anfds [fd].reify |= flags;
784
785 if (expect_true (!reify))
786 {
787 ++fdchangecnt;
788 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
789 fdchanges [fdchangecnt - 1] = fd;
790 }
791}
792
793void inline_speed
794fd_kill (EV_P_ int fd)
795{
796 ev_io *w;
797
798 while ((w = (ev_io *)anfds [fd].head))
799 {
800 ev_io_stop (EV_A_ w);
801 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
802 }
803}
804
805int inline_size
806fd_valid (int fd)
807{
808#ifdef _WIN32
809 return _get_osfhandle (fd) != -1;
810#else
811 return fcntl (fd, F_GETFD) != -1;
812#endif
813}
814
815/* called on EBADF to verify fds */
816static void noinline
817fd_ebadf (EV_P)
818{
819 int fd;
820
821 for (fd = 0; fd < anfdmax; ++fd)
822 if (anfds [fd].events)
823 if (!fd_valid (fd) && errno == EBADF)
824 fd_kill (EV_A_ fd);
825}
826
827/* called on ENOMEM in select/poll to kill some fds and retry */
828static void noinline
829fd_enomem (EV_P)
830{
831 int fd;
832
833 for (fd = anfdmax; fd--; )
834 if (anfds [fd].events)
835 {
836 fd_kill (EV_A_ fd);
837 return;
838 }
839}
840
841/* usually called after fork if backend needs to re-arm all fds from scratch */
842static void noinline
843fd_rearm_all (EV_P)
844{
845 int fd;
846
847 for (fd = 0; fd < anfdmax; ++fd)
848 if (anfds [fd].events)
849 {
850 anfds [fd].events = 0;
851 anfds [fd].emask = 0;
852 fd_change (EV_A_ fd, EV_IOFDSET | 1);
853 }
854}
855
856/*****************************************************************************/
857
858/*
859 * the heap functions want a real array index. array index 0 uis guaranteed to not
860 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
861 * the branching factor of the d-tree.
862 */
863
864/*
865 * at the moment we allow libev the luxury of two heaps,
866 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
867 * which is more cache-efficient.
868 * the difference is about 5% with 50000+ watchers.
869 */
870#if EV_USE_4HEAP
871
872#define DHEAP 4
873#define HEAP0 (DHEAP - 1) /* index of first element in heap */
874#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
875#define UPHEAP_DONE(p,k) ((p) == (k))
876
877/* away from the root */
878void inline_speed
879downheap (ANHE *heap, int N, int k)
880{
881 ANHE he = heap [k];
882 ANHE *E = heap + N + HEAP0;
883
884 for (;;)
885 {
886 ev_tstamp minat;
887 ANHE *minpos;
888 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
889
890 /* find minimum child */
891 if (expect_true (pos + DHEAP - 1 < E))
892 {
893 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
894 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
895 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
896 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
897 }
898 else if (pos < E)
899 {
900 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
901 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
902 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
903 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
904 }
905 else
906 break;
907
908 if (ANHE_at (he) <= minat)
909 break;
910
911 heap [k] = *minpos;
912 ev_active (ANHE_w (*minpos)) = k;
913
914 k = minpos - heap;
915 }
916
917 heap [k] = he;
918 ev_active (ANHE_w (he)) = k;
919}
920
921#else /* 4HEAP */
922
923#define HEAP0 1
924#define HPARENT(k) ((k) >> 1)
925#define UPHEAP_DONE(p,k) (!(p))
926
927/* away from the root */
928void inline_speed
929downheap (ANHE *heap, int N, int k)
930{
931 ANHE he = heap [k];
932
933 for (;;)
934 {
935 int c = k << 1;
936
937 if (c > N + HEAP0 - 1)
938 break;
939
940 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
941 ? 1 : 0;
942
943 if (ANHE_at (he) <= ANHE_at (heap [c]))
944 break;
945
946 heap [k] = heap [c];
947 ev_active (ANHE_w (heap [k])) = k;
948
949 k = c;
950 }
951
952 heap [k] = he;
953 ev_active (ANHE_w (he)) = k;
954}
955#endif
956
957/* towards the root */
958void inline_speed
959upheap (ANHE *heap, int k)
960{
961 ANHE he = heap [k];
962
963 for (;;)
964 {
965 int p = HPARENT (k);
966
967 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
968 break;
969
970 heap [k] = heap [p];
971 ev_active (ANHE_w (heap [k])) = k;
972 k = p;
973 }
974
975 heap [k] = he;
976 ev_active (ANHE_w (he)) = k;
977}
978
979void inline_size
980adjustheap (ANHE *heap, int N, int k)
981{
982 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
983 upheap (heap, k);
984 else
985 downheap (heap, N, k);
986}
987
988/* rebuild the heap: this function is used only once and executed rarely */
989void inline_size
990reheap (ANHE *heap, int N)
991{
992 int i;
993
994 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
995 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
996 for (i = 0; i < N; ++i)
997 upheap (heap, i + HEAP0);
998}
999
1000/*****************************************************************************/
82 1001
83typedef struct 1002typedef struct
84{ 1003{
85 struct ev_io *head; 1004 WL head;
86 unsigned char wev, rev; /* want, received event set */ 1005 EV_ATOMIC_T gotsig;
87} ANFD; 1006} ANSIG;
88 1007
89static ANFD *anfds; 1008static ANSIG *signals;
90static int anfdmax; 1009static int signalmax;
91 1010
92static int *fdchanges; 1011static EV_ATOMIC_T gotsig;
93static int fdchangemax, fdchangecnt; 1012
1013/*****************************************************************************/
1014
1015void inline_speed
1016fd_intern (int fd)
1017{
1018#ifdef _WIN32
1019 unsigned long arg = 1;
1020 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1021#else
1022 fcntl (fd, F_SETFD, FD_CLOEXEC);
1023 fcntl (fd, F_SETFL, O_NONBLOCK);
1024#endif
1025}
1026
1027static void noinline
1028evpipe_init (EV_P)
1029{
1030 if (!ev_is_active (&pipeev))
1031 {
1032#if EV_USE_EVENTFD
1033 if ((evfd = eventfd (0, 0)) >= 0)
1034 {
1035 evpipe [0] = -1;
1036 fd_intern (evfd);
1037 ev_io_set (&pipeev, evfd, EV_READ);
1038 }
1039 else
1040#endif
1041 {
1042 while (pipe (evpipe))
1043 ev_syserr ("(libev) error creating signal/async pipe");
1044
1045 fd_intern (evpipe [0]);
1046 fd_intern (evpipe [1]);
1047 ev_io_set (&pipeev, evpipe [0], EV_READ);
1048 }
1049
1050 ev_io_start (EV_A_ &pipeev);
1051 ev_unref (EV_A); /* watcher should not keep loop alive */
1052 }
1053}
1054
1055void inline_size
1056evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1057{
1058 if (!*flag)
1059 {
1060 int old_errno = errno; /* save errno because write might clobber it */
1061
1062 *flag = 1;
1063
1064#if EV_USE_EVENTFD
1065 if (evfd >= 0)
1066 {
1067 uint64_t counter = 1;
1068 write (evfd, &counter, sizeof (uint64_t));
1069 }
1070 else
1071#endif
1072 write (evpipe [1], &old_errno, 1);
1073
1074 errno = old_errno;
1075 }
1076}
94 1077
95static void 1078static void
96anfds_init (ANFD *base, int count) 1079pipecb (EV_P_ ev_io *iow, int revents)
97{ 1080{
98 while (count--) 1081#if EV_USE_EVENTFD
99 { 1082 if (evfd >= 0)
100 base->head = 0;
101 base->wev = base->rev = EV_NONE;
102 ++base;
103 } 1083 {
104} 1084 uint64_t counter;
1085 read (evfd, &counter, sizeof (uint64_t));
1086 }
1087 else
1088#endif
1089 {
1090 char dummy;
1091 read (evpipe [0], &dummy, 1);
1092 }
105 1093
106typedef struct 1094 if (gotsig && ev_is_default_loop (EV_A))
107{ 1095 {
108 struct ev_watcher *w; 1096 int signum;
109 int events; 1097 gotsig = 0;
110} ANPENDING;
111 1098
112static ANPENDING *pendings; 1099 for (signum = signalmax; signum--; )
113static int pendingmax, pendingcnt; 1100 if (signals [signum].gotsig)
1101 ev_feed_signal_event (EV_A_ signum + 1);
1102 }
1103
1104#if EV_ASYNC_ENABLE
1105 if (gotasync)
1106 {
1107 int i;
1108 gotasync = 0;
1109
1110 for (i = asynccnt; i--; )
1111 if (asyncs [i]->sent)
1112 {
1113 asyncs [i]->sent = 0;
1114 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1115 }
1116 }
1117#endif
1118}
1119
1120/*****************************************************************************/
114 1121
115static void 1122static void
116event (struct ev_watcher *w, int events) 1123ev_sighandler (int signum)
117{ 1124{
118 w->pending = ++pendingcnt; 1125#if EV_MULTIPLICITY
119 array_needsize (pendings, pendingmax, pendingcnt, ); 1126 struct ev_loop *loop = &default_loop_struct;
120 pendings [pendingcnt - 1].w = w; 1127#endif
121 pendings [pendingcnt - 1].events = events; 1128
1129#if _WIN32
1130 signal (signum, ev_sighandler);
1131#endif
1132
1133 signals [signum - 1].gotsig = 1;
1134 evpipe_write (EV_A_ &gotsig);
122} 1135}
1136
1137void noinline
1138ev_feed_signal_event (EV_P_ int signum)
1139{
1140 WL w;
1141
1142#if EV_MULTIPLICITY
1143 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1144#endif
1145
1146 --signum;
1147
1148 if (signum < 0 || signum >= signalmax)
1149 return;
1150
1151 signals [signum].gotsig = 0;
1152
1153 for (w = signals [signum].head; w; w = w->next)
1154 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1155}
1156
1157/*****************************************************************************/
1158
1159static WL childs [EV_PID_HASHSIZE];
1160
1161#ifndef _WIN32
1162
1163static ev_signal childev;
1164
1165#ifndef WIFCONTINUED
1166# define WIFCONTINUED(status) 0
1167#endif
1168
1169void inline_speed
1170child_reap (EV_P_ int chain, int pid, int status)
1171{
1172 ev_child *w;
1173 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1174
1175 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1176 {
1177 if ((w->pid == pid || !w->pid)
1178 && (!traced || (w->flags & 1)))
1179 {
1180 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1181 w->rpid = pid;
1182 w->rstatus = status;
1183 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1184 }
1185 }
1186}
1187
1188#ifndef WCONTINUED
1189# define WCONTINUED 0
1190#endif
123 1191
124static void 1192static void
125fd_event (int fd, int events) 1193childcb (EV_P_ ev_signal *sw, int revents)
126{ 1194{
127 ANFD *anfd = anfds + fd; 1195 int pid, status;
128 struct ev_io *w;
129 1196
130 for (w = anfd->head; w; w = w->next) 1197 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
131 { 1198 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
132 int ev = w->events & events; 1199 if (!WCONTINUED
1200 || errno != EINVAL
1201 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1202 return;
133 1203
134 if (ev) 1204 /* make sure we are called again until all children have been reaped */
135 event ((struct ev_watcher *)w, ev); 1205 /* we need to do it this way so that the callback gets called before we continue */
136 } 1206 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
137}
138 1207
139static struct ev_timer **timers; 1208 child_reap (EV_A_ pid, pid, status);
140static int timermax, timercnt; 1209 if (EV_PID_HASHSIZE > 1)
141 1210 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
142static void
143upheap (int k)
144{
145 struct ev_timer *w = timers [k];
146
147 while (k && timers [k >> 1]->at > w->at)
148 {
149 timers [k] = timers [k >> 1];
150 timers [k]->active = k + 1;
151 k >>= 1;
152 }
153
154 timers [k] = w;
155 timers [k]->active = k + 1;
156
157} 1211}
158 1212
159static void 1213#endif
160downheap (int k)
161{
162 struct ev_timer *w = timers [k];
163 1214
164 while (k <= (timercnt >> 1)) 1215/*****************************************************************************/
165 {
166 int j = k << 1;
167 1216
168 if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at) 1217#if EV_USE_PORT
169 ++j; 1218# include "ev_port.c"
170 1219#endif
171 if (w->at <= timers [j]->at) 1220#if EV_USE_KQUEUE
172 break; 1221# include "ev_kqueue.c"
173 1222#endif
174 timers [k] = timers [j];
175 timers [k]->active = k;
176 k = j;
177 }
178
179 timers [k] = w;
180 timers [k]->active = k + 1;
181}
182
183static struct ev_signal **signals;
184static int signalmax, signalcnt;
185
186static void
187signals_init (struct ev_signal **base, int count)
188{
189 while (count--)
190 *base++ = 0;
191}
192
193#if HAVE_EPOLL 1223#if EV_USE_EPOLL
194# include "ev_epoll.c" 1224# include "ev_epoll.c"
195#endif 1225#endif
1226#if EV_USE_POLL
1227# include "ev_poll.c"
1228#endif
196#if HAVE_SELECT 1229#if EV_USE_SELECT
197# include "ev_select.c" 1230# include "ev_select.c"
198#endif 1231#endif
199 1232
200int ev_init (int flags) 1233int
1234ev_version_major (void)
201{ 1235{
202#if HAVE_MONOTONIC 1236 return EV_VERSION_MAJOR;
1237}
1238
1239int
1240ev_version_minor (void)
1241{
1242 return EV_VERSION_MINOR;
1243}
1244
1245/* return true if we are running with elevated privileges and should ignore env variables */
1246int inline_size
1247enable_secure (void)
1248{
1249#ifdef _WIN32
1250 return 0;
1251#else
1252 return getuid () != geteuid ()
1253 || getgid () != getegid ();
1254#endif
1255}
1256
1257unsigned int
1258ev_supported_backends (void)
1259{
1260 unsigned int flags = 0;
1261
1262 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1263 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1264 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1265 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1266 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
203 { 1267
1268 return flags;
1269}
1270
1271unsigned int
1272ev_recommended_backends (void)
1273{
1274 unsigned int flags = ev_supported_backends ();
1275
1276#ifndef __NetBSD__
1277 /* kqueue is borked on everything but netbsd apparently */
1278 /* it usually doesn't work correctly on anything but sockets and pipes */
1279 flags &= ~EVBACKEND_KQUEUE;
1280#endif
1281#ifdef __APPLE__
1282 /* only select works correctly on that "unix-certified" platform */
1283 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1284 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1285#endif
1286
1287 return flags;
1288}
1289
1290unsigned int
1291ev_embeddable_backends (void)
1292{
1293 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1294
1295 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1296 /* please fix it and tell me how to detect the fix */
1297 flags &= ~EVBACKEND_EPOLL;
1298
1299 return flags;
1300}
1301
1302unsigned int
1303ev_backend (EV_P)
1304{
1305 return backend;
1306}
1307
1308unsigned int
1309ev_loop_count (EV_P)
1310{
1311 return loop_count;
1312}
1313
1314void
1315ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1316{
1317 io_blocktime = interval;
1318}
1319
1320void
1321ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1322{
1323 timeout_blocktime = interval;
1324}
1325
1326static void noinline
1327loop_init (EV_P_ unsigned int flags)
1328{
1329 if (!backend)
1330 {
1331#if EV_USE_REALTIME
1332 if (!have_realtime)
1333 {
204 struct timespec ts; 1334 struct timespec ts;
1335
1336 if (!clock_gettime (CLOCK_REALTIME, &ts))
1337 have_realtime = 1;
1338 }
1339#endif
1340
1341#if EV_USE_MONOTONIC
1342 if (!have_monotonic)
1343 {
1344 struct timespec ts;
1345
205 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1346 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
206 have_monotonic = 1; 1347 have_monotonic = 1;
207 } 1348 }
208#endif 1349#endif
209 1350
210 ev_now = ev_time (); 1351 ev_rt_now = ev_time ();
1352 mn_now = get_clock ();
1353 now_floor = mn_now;
1354 rtmn_diff = ev_rt_now - mn_now;
211 1355
1356 io_blocktime = 0.;
1357 timeout_blocktime = 0.;
1358 backend = 0;
1359 backend_fd = -1;
1360 gotasync = 0;
1361#if EV_USE_INOTIFY
1362 fs_fd = -2;
1363#endif
1364
1365 /* pid check not overridable via env */
1366#ifndef _WIN32
1367 if (flags & EVFLAG_FORKCHECK)
1368 curpid = getpid ();
1369#endif
1370
1371 if (!(flags & EVFLAG_NOENV)
1372 && !enable_secure ()
1373 && getenv ("LIBEV_FLAGS"))
1374 flags = atoi (getenv ("LIBEV_FLAGS"));
1375
1376 if (!(flags & 0x0000ffffU))
1377 flags |= ev_recommended_backends ();
1378
1379#if EV_USE_PORT
1380 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1381#endif
1382#if EV_USE_KQUEUE
1383 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1384#endif
212#if HAVE_EPOLL 1385#if EV_USE_EPOLL
213 if (epoll_init (flags)) 1386 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
214 return ev_method;
215#endif 1387#endif
1388#if EV_USE_POLL
1389 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1390#endif
216#if HAVE_SELECT 1391#if EV_USE_SELECT
217 if (select_init (flags)) 1392 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
218 return ev_method;
219#endif 1393#endif
220 1394
221 ev_method = EVMETHOD_NONE; 1395 ev_init (&pipeev, pipecb);
222 return ev_method; 1396 ev_set_priority (&pipeev, EV_MAXPRI);
1397 }
223} 1398}
224 1399
225void ev_prefork (void) 1400static void noinline
226{ 1401loop_destroy (EV_P)
227}
228
229void ev_postfork_parent (void)
230{
231}
232
233void ev_postfork_child (void)
234{
235#if HAVE_EPOLL
236 epoll_postfork_child ();
237#endif
238}
239
240static void
241call_pending ()
242{ 1402{
243 int i; 1403 int i;
244 1404
245 for (i = 0; i < pendingcnt; ++i) 1405 if (ev_is_active (&pipeev))
246 { 1406 {
247 ANPENDING *p = pendings + i; 1407 ev_ref (EV_A); /* signal watcher */
1408 ev_io_stop (EV_A_ &pipeev);
248 1409
249 if (p->w) 1410#if EV_USE_EVENTFD
1411 if (evfd >= 0)
1412 close (evfd);
1413#endif
1414
1415 if (evpipe [0] >= 0)
250 { 1416 {
251 p->w->pending = 0; 1417 close (evpipe [0]);
252 p->w->cb (p->w, p->events); 1418 close (evpipe [1]);
253 } 1419 }
254 } 1420 }
255 1421
256 pendingcnt = 0; 1422#if EV_USE_INOTIFY
257} 1423 if (fs_fd >= 0)
1424 close (fs_fd);
1425#endif
258 1426
259static void 1427 if (backend_fd >= 0)
260timer_reify (void) 1428 close (backend_fd);
1429
1430#if EV_USE_PORT
1431 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1432#endif
1433#if EV_USE_KQUEUE
1434 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1435#endif
1436#if EV_USE_EPOLL
1437 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1438#endif
1439#if EV_USE_POLL
1440 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1441#endif
1442#if EV_USE_SELECT
1443 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1444#endif
1445
1446 for (i = NUMPRI; i--; )
1447 {
1448 array_free (pending, [i]);
1449#if EV_IDLE_ENABLE
1450 array_free (idle, [i]);
1451#endif
1452 }
1453
1454 ev_free (anfds); anfdmax = 0;
1455
1456 /* have to use the microsoft-never-gets-it-right macro */
1457 array_free (fdchange, EMPTY);
1458 array_free (timer, EMPTY);
1459#if EV_PERIODIC_ENABLE
1460 array_free (periodic, EMPTY);
1461#endif
1462#if EV_FORK_ENABLE
1463 array_free (fork, EMPTY);
1464#endif
1465 array_free (prepare, EMPTY);
1466 array_free (check, EMPTY);
1467#if EV_ASYNC_ENABLE
1468 array_free (async, EMPTY);
1469#endif
1470
1471 backend = 0;
1472}
1473
1474#if EV_USE_INOTIFY
1475void inline_size infy_fork (EV_P);
1476#endif
1477
1478void inline_size
1479loop_fork (EV_P)
261{ 1480{
262 while (timercnt && timers [0]->at <= ev_now) 1481#if EV_USE_PORT
1482 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1483#endif
1484#if EV_USE_KQUEUE
1485 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1486#endif
1487#if EV_USE_EPOLL
1488 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1489#endif
1490#if EV_USE_INOTIFY
1491 infy_fork (EV_A);
1492#endif
1493
1494 if (ev_is_active (&pipeev))
1495 {
1496 /* this "locks" the handlers against writing to the pipe */
1497 /* while we modify the fd vars */
1498 gotsig = 1;
1499#if EV_ASYNC_ENABLE
1500 gotasync = 1;
1501#endif
1502
1503 ev_ref (EV_A);
1504 ev_io_stop (EV_A_ &pipeev);
1505
1506#if EV_USE_EVENTFD
1507 if (evfd >= 0)
1508 close (evfd);
1509#endif
1510
1511 if (evpipe [0] >= 0)
1512 {
1513 close (evpipe [0]);
1514 close (evpipe [1]);
1515 }
1516
1517 evpipe_init (EV_A);
1518 /* now iterate over everything, in case we missed something */
1519 pipecb (EV_A_ &pipeev, EV_READ);
1520 }
1521
1522 postfork = 0;
1523}
1524
1525#if EV_MULTIPLICITY
1526
1527struct ev_loop *
1528ev_loop_new (unsigned int flags)
1529{
1530 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1531
1532 memset (loop, 0, sizeof (struct ev_loop));
1533
1534 loop_init (EV_A_ flags);
1535
1536 if (ev_backend (EV_A))
1537 return loop;
1538
1539 return 0;
1540}
1541
1542void
1543ev_loop_destroy (EV_P)
1544{
1545 loop_destroy (EV_A);
1546 ev_free (loop);
1547}
1548
1549void
1550ev_loop_fork (EV_P)
1551{
1552 postfork = 1; /* must be in line with ev_default_fork */
1553}
1554
1555#if EV_VERIFY
1556static void noinline
1557verify_watcher (EV_P_ W w)
1558{
1559 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1560
1561 if (w->pending)
1562 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1563}
1564
1565static void noinline
1566verify_heap (EV_P_ ANHE *heap, int N)
1567{
1568 int i;
1569
1570 for (i = HEAP0; i < N + HEAP0; ++i)
1571 {
1572 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1573 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1574 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1575
1576 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1577 }
1578}
1579
1580static void noinline
1581array_verify (EV_P_ W *ws, int cnt)
1582{
1583 while (cnt--)
1584 {
1585 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1586 verify_watcher (EV_A_ ws [cnt]);
1587 }
1588}
1589#endif
1590
1591void
1592ev_loop_verify (EV_P)
1593{
1594#if EV_VERIFY
1595 int i;
1596 WL w;
1597
1598 assert (activecnt >= -1);
1599
1600 assert (fdchangemax >= fdchangecnt);
1601 for (i = 0; i < fdchangecnt; ++i)
1602 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1603
1604 assert (anfdmax >= 0);
1605 for (i = 0; i < anfdmax; ++i)
1606 for (w = anfds [i].head; w; w = w->next)
263 { 1607 {
264 struct ev_timer *w = timers [0]; 1608 verify_watcher (EV_A_ (W)w);
1609 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1610 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1611 }
265 1612
1613 assert (timermax >= timercnt);
1614 verify_heap (EV_A_ timers, timercnt);
1615
1616#if EV_PERIODIC_ENABLE
1617 assert (periodicmax >= periodiccnt);
1618 verify_heap (EV_A_ periodics, periodiccnt);
1619#endif
1620
1621 for (i = NUMPRI; i--; )
1622 {
1623 assert (pendingmax [i] >= pendingcnt [i]);
1624#if EV_IDLE_ENABLE
1625 assert (idleall >= 0);
1626 assert (idlemax [i] >= idlecnt [i]);
1627 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1628#endif
1629 }
1630
1631#if EV_FORK_ENABLE
1632 assert (forkmax >= forkcnt);
1633 array_verify (EV_A_ (W *)forks, forkcnt);
1634#endif
1635
1636#if EV_ASYNC_ENABLE
1637 assert (asyncmax >= asynccnt);
1638 array_verify (EV_A_ (W *)asyncs, asynccnt);
1639#endif
1640
1641 assert (preparemax >= preparecnt);
1642 array_verify (EV_A_ (W *)prepares, preparecnt);
1643
1644 assert (checkmax >= checkcnt);
1645 array_verify (EV_A_ (W *)checks, checkcnt);
1646
1647# if 0
1648 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1649 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1650# endif
1651#endif
1652}
1653
1654#endif /* multiplicity */
1655
1656#if EV_MULTIPLICITY
1657struct ev_loop *
1658ev_default_loop_init (unsigned int flags)
1659#else
1660int
1661ev_default_loop (unsigned int flags)
1662#endif
1663{
1664 if (!ev_default_loop_ptr)
1665 {
1666#if EV_MULTIPLICITY
1667 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1668#else
1669 ev_default_loop_ptr = 1;
1670#endif
1671
1672 loop_init (EV_A_ flags);
1673
1674 if (ev_backend (EV_A))
1675 {
1676#ifndef _WIN32
1677 ev_signal_init (&childev, childcb, SIGCHLD);
1678 ev_set_priority (&childev, EV_MAXPRI);
1679 ev_signal_start (EV_A_ &childev);
1680 ev_unref (EV_A); /* child watcher should not keep loop alive */
1681#endif
1682 }
1683 else
1684 ev_default_loop_ptr = 0;
1685 }
1686
1687 return ev_default_loop_ptr;
1688}
1689
1690void
1691ev_default_destroy (void)
1692{
1693#if EV_MULTIPLICITY
1694 struct ev_loop *loop = ev_default_loop_ptr;
1695#endif
1696
1697 ev_default_loop_ptr = 0;
1698
1699#ifndef _WIN32
1700 ev_ref (EV_A); /* child watcher */
1701 ev_signal_stop (EV_A_ &childev);
1702#endif
1703
1704 loop_destroy (EV_A);
1705}
1706
1707void
1708ev_default_fork (void)
1709{
1710#if EV_MULTIPLICITY
1711 struct ev_loop *loop = ev_default_loop_ptr;
1712#endif
1713
1714 postfork = 1; /* must be in line with ev_loop_fork */
1715}
1716
1717/*****************************************************************************/
1718
1719void
1720ev_invoke (EV_P_ void *w, int revents)
1721{
1722 EV_CB_INVOKE ((W)w, revents);
1723}
1724
1725void inline_speed
1726call_pending (EV_P)
1727{
1728 int pri;
1729
1730 for (pri = NUMPRI; pri--; )
1731 while (pendingcnt [pri])
1732 {
1733 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1734
1735 if (expect_true (p->w))
1736 {
1737 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1738
1739 p->w->pending = 0;
1740 EV_CB_INVOKE (p->w, p->events);
1741 EV_FREQUENT_CHECK;
1742 }
1743 }
1744}
1745
1746#if EV_IDLE_ENABLE
1747void inline_size
1748idle_reify (EV_P)
1749{
1750 if (expect_false (idleall))
1751 {
1752 int pri;
1753
1754 for (pri = NUMPRI; pri--; )
1755 {
1756 if (pendingcnt [pri])
1757 break;
1758
1759 if (idlecnt [pri])
1760 {
1761 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1762 break;
1763 }
1764 }
1765 }
1766}
1767#endif
1768
1769void inline_size
1770timers_reify (EV_P)
1771{
1772 EV_FREQUENT_CHECK;
1773
1774 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1775 {
1776 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1777
1778 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
1779
266 /* first reschedule timer */ 1780 /* first reschedule or stop timer */
267 if (w->repeat) 1781 if (w->repeat)
268 { 1782 {
269 fprintf (stderr, "a %f now %f repeat %f, %f\n", w->at, ev_now, w->repeat, w->repeat *1e30);//D
270 if (w->is_abs)
271 w->at += floor ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
272 else
273 w->at = ev_now + w->repeat; 1783 ev_at (w) += w->repeat;
1784 if (ev_at (w) < mn_now)
1785 ev_at (w) = mn_now;
274 1786
275 fprintf (stderr, "b %f\n", w->at);//D 1787 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
276 1788
277 downheap (0); 1789 ANHE_at_cache (timers [HEAP0]);
1790 downheap (timers, timercnt, HEAP0);
278 } 1791 }
279 else 1792 else
280 evtimer_stop (w); /* nonrepeating: stop timer */ 1793 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
281 1794
282 event ((struct ev_watcher *)w, EV_TIMEOUT); 1795 EV_FREQUENT_CHECK;
1796 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1797 }
1798}
1799
1800#if EV_PERIODIC_ENABLE
1801void inline_size
1802periodics_reify (EV_P)
1803{
1804 EV_FREQUENT_CHECK;
1805
1806 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
283 } 1807 {
284} 1808 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
285 1809
286int ev_loop_done; 1810 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
287 1811
1812 /* first reschedule or stop timer */
1813 if (w->reschedule_cb)
1814 {
1815 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1816
1817 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1818
1819 ANHE_at_cache (periodics [HEAP0]);
1820 downheap (periodics, periodiccnt, HEAP0);
1821 }
1822 else if (w->interval)
1823 {
1824 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1825 /* if next trigger time is not sufficiently in the future, put it there */
1826 /* this might happen because of floating point inexactness */
1827 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1828 {
1829 ev_at (w) += w->interval;
1830
1831 /* if interval is unreasonably low we might still have a time in the past */
1832 /* so correct this. this will make the periodic very inexact, but the user */
1833 /* has effectively asked to get triggered more often than possible */
1834 if (ev_at (w) < ev_rt_now)
1835 ev_at (w) = ev_rt_now;
1836 }
1837
1838 ANHE_at_cache (periodics [HEAP0]);
1839 downheap (periodics, periodiccnt, HEAP0);
1840 }
1841 else
1842 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1843
1844 EV_FREQUENT_CHECK;
1845 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1846 }
1847}
1848
1849static void noinline
1850periodics_reschedule (EV_P)
1851{
1852 int i;
1853
1854 /* adjust periodics after time jump */
1855 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1856 {
1857 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1858
1859 if (w->reschedule_cb)
1860 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1861 else if (w->interval)
1862 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1863
1864 ANHE_at_cache (periodics [i]);
1865 }
1866
1867 reheap (periodics, periodiccnt);
1868}
1869#endif
1870
1871void inline_speed
1872time_update (EV_P_ ev_tstamp max_block)
1873{
1874 int i;
1875
1876#if EV_USE_MONOTONIC
1877 if (expect_true (have_monotonic))
1878 {
1879 ev_tstamp odiff = rtmn_diff;
1880
1881 mn_now = get_clock ();
1882
1883 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1884 /* interpolate in the meantime */
1885 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1886 {
1887 ev_rt_now = rtmn_diff + mn_now;
1888 return;
1889 }
1890
1891 now_floor = mn_now;
1892 ev_rt_now = ev_time ();
1893
1894 /* loop a few times, before making important decisions.
1895 * on the choice of "4": one iteration isn't enough,
1896 * in case we get preempted during the calls to
1897 * ev_time and get_clock. a second call is almost guaranteed
1898 * to succeed in that case, though. and looping a few more times
1899 * doesn't hurt either as we only do this on time-jumps or
1900 * in the unlikely event of having been preempted here.
1901 */
1902 for (i = 4; --i; )
1903 {
1904 rtmn_diff = ev_rt_now - mn_now;
1905
1906 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1907 return; /* all is well */
1908
1909 ev_rt_now = ev_time ();
1910 mn_now = get_clock ();
1911 now_floor = mn_now;
1912 }
1913
1914# if EV_PERIODIC_ENABLE
1915 periodics_reschedule (EV_A);
1916# endif
1917 /* no timer adjustment, as the monotonic clock doesn't jump */
1918 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1919 }
1920 else
1921#endif
1922 {
1923 ev_rt_now = ev_time ();
1924
1925 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1926 {
1927#if EV_PERIODIC_ENABLE
1928 periodics_reschedule (EV_A);
1929#endif
1930 /* adjust timers. this is easy, as the offset is the same for all of them */
1931 for (i = 0; i < timercnt; ++i)
1932 {
1933 ANHE *he = timers + i + HEAP0;
1934 ANHE_w (*he)->at += ev_rt_now - mn_now;
1935 ANHE_at_cache (*he);
1936 }
1937 }
1938
1939 mn_now = ev_rt_now;
1940 }
1941}
1942
1943void
1944ev_ref (EV_P)
1945{
1946 ++activecnt;
1947}
1948
1949void
1950ev_unref (EV_P)
1951{
1952 --activecnt;
1953}
1954
1955void
1956ev_now_update (EV_P)
1957{
1958 time_update (EV_A_ 1e100);
1959}
1960
1961static int loop_done;
1962
1963void
288int ev_loop (int flags) 1964ev_loop (EV_P_ int flags)
289{ 1965{
290 double block; 1966 loop_done = EVUNLOOP_CANCEL;
291 ev_loop_done = flags & EVLOOP_ONESHOT; 1967
1968 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
292 1969
293 do 1970 do
294 { 1971 {
1972#if EV_VERIFY >= 2
1973 ev_loop_verify (EV_A);
1974#endif
1975
1976#ifndef _WIN32
1977 if (expect_false (curpid)) /* penalise the forking check even more */
1978 if (expect_false (getpid () != curpid))
1979 {
1980 curpid = getpid ();
1981 postfork = 1;
1982 }
1983#endif
1984
1985#if EV_FORK_ENABLE
1986 /* we might have forked, so queue fork handlers */
1987 if (expect_false (postfork))
1988 if (forkcnt)
1989 {
1990 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1991 call_pending (EV_A);
1992 }
1993#endif
1994
1995 /* queue prepare watchers (and execute them) */
1996 if (expect_false (preparecnt))
1997 {
1998 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1999 call_pending (EV_A);
2000 }
2001
2002 if (expect_false (!activecnt))
2003 break;
2004
2005 /* we might have forked, so reify kernel state if necessary */
2006 if (expect_false (postfork))
2007 loop_fork (EV_A);
2008
295 /* update fd-related kernel structures */ 2009 /* update fd-related kernel structures */
296 method_reify (); fdchangecnt = 0; 2010 fd_reify (EV_A);
297 2011
298 /* calculate blocking time */ 2012 /* calculate blocking time */
299 ev_now = ev_time (); 2013 {
2014 ev_tstamp waittime = 0.;
2015 ev_tstamp sleeptime = 0.;
300 2016
301 if (flags & EVLOOP_NONBLOCK) 2017 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
302 block = 0.;
303 else if (!timercnt)
304 block = MAX_BLOCKTIME;
305 else
306 { 2018 {
307 block = timers [0]->at - ev_now + method_fudge; 2019 /* update time to cancel out callback processing overhead */
308 if (block < 0.) block = 0.; 2020 time_update (EV_A_ 1e100);
309 else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME; 2021
2022 waittime = MAX_BLOCKTIME;
2023
2024 if (timercnt)
2025 {
2026 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
2027 if (waittime > to) waittime = to;
2028 }
2029
2030#if EV_PERIODIC_ENABLE
2031 if (periodiccnt)
2032 {
2033 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2034 if (waittime > to) waittime = to;
2035 }
2036#endif
2037
2038 if (expect_false (waittime < timeout_blocktime))
2039 waittime = timeout_blocktime;
2040
2041 sleeptime = waittime - backend_fudge;
2042
2043 if (expect_true (sleeptime > io_blocktime))
2044 sleeptime = io_blocktime;
2045
2046 if (sleeptime)
2047 {
2048 ev_sleep (sleeptime);
2049 waittime -= sleeptime;
2050 }
310 } 2051 }
311 2052
312 fprintf (stderr, "block %f\n", block);//D 2053 ++loop_count;
313 method_poll (block); 2054 backend_poll (EV_A_ waittime);
314 2055
2056 /* update ev_rt_now, do magic */
2057 time_update (EV_A_ waittime + sleeptime);
2058 }
2059
315 /* put pending timers into pendign queue and reschedule them */ 2060 /* queue pending timers and reschedule them */
2061 timers_reify (EV_A); /* relative timers called last */
2062#if EV_PERIODIC_ENABLE
2063 periodics_reify (EV_A); /* absolute timers called first */
2064#endif
2065
2066#if EV_IDLE_ENABLE
2067 /* queue idle watchers unless other events are pending */
316 timer_reify (); 2068 idle_reify (EV_A);
2069#endif
317 2070
318 ev_now = ev_time (); 2071 /* queue check watchers, to be executed first */
2072 if (expect_false (checkcnt))
2073 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2074
319 call_pending (); 2075 call_pending (EV_A);
320 } 2076 }
321 while (!ev_loop_done); 2077 while (expect_true (
322} 2078 activecnt
2079 && !loop_done
2080 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2081 ));
323 2082
324static void 2083 if (loop_done == EVUNLOOP_ONE)
325wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem) 2084 loop_done = EVUNLOOP_CANCEL;
2085}
2086
2087void
2088ev_unloop (EV_P_ int how)
2089{
2090 loop_done = how;
2091}
2092
2093/*****************************************************************************/
2094
2095void inline_size
2096wlist_add (WL *head, WL elem)
326{ 2097{
327 elem->next = *head; 2098 elem->next = *head;
328 *head = elem; 2099 *head = elem;
329} 2100}
330 2101
331static void 2102void inline_size
332wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem) 2103wlist_del (WL *head, WL elem)
333{ 2104{
334 while (*head) 2105 while (*head)
335 { 2106 {
336 if (*head == elem) 2107 if (*head == elem)
337 { 2108 {
… …
341 2112
342 head = &(*head)->next; 2113 head = &(*head)->next;
343 } 2114 }
344} 2115}
345 2116
2117void inline_speed
2118clear_pending (EV_P_ W w)
2119{
2120 if (w->pending)
2121 {
2122 pendings [ABSPRI (w)][w->pending - 1].w = 0;
2123 w->pending = 0;
2124 }
2125}
2126
2127int
2128ev_clear_pending (EV_P_ void *w)
2129{
2130 W w_ = (W)w;
2131 int pending = w_->pending;
2132
2133 if (expect_true (pending))
2134 {
2135 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2136 w_->pending = 0;
2137 p->w = 0;
2138 return p->events;
2139 }
2140 else
2141 return 0;
2142}
2143
2144void inline_size
2145pri_adjust (EV_P_ W w)
2146{
2147 int pri = w->priority;
2148 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2149 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2150 w->priority = pri;
2151}
2152
2153void inline_speed
2154ev_start (EV_P_ W w, int active)
2155{
2156 pri_adjust (EV_A_ w);
2157 w->active = active;
2158 ev_ref (EV_A);
2159}
2160
2161void inline_size
2162ev_stop (EV_P_ W w)
2163{
2164 ev_unref (EV_A);
2165 w->active = 0;
2166}
2167
2168/*****************************************************************************/
2169
2170void noinline
2171ev_io_start (EV_P_ ev_io *w)
2172{
2173 int fd = w->fd;
2174
2175 if (expect_false (ev_is_active (w)))
2176 return;
2177
2178 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2179 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));
2180
2181 EV_FREQUENT_CHECK;
2182
2183 ev_start (EV_A_ (W)w, 1);
2184 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2185 wlist_add (&anfds[fd].head, (WL)w);
2186
2187 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
2188 w->events &= ~EV_IOFDSET;
2189
2190 EV_FREQUENT_CHECK;
2191}
2192
2193void noinline
2194ev_io_stop (EV_P_ ev_io *w)
2195{
2196 clear_pending (EV_A_ (W)w);
2197 if (expect_false (!ev_is_active (w)))
2198 return;
2199
2200 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2201
2202 EV_FREQUENT_CHECK;
2203
2204 wlist_del (&anfds[w->fd].head, (WL)w);
2205 ev_stop (EV_A_ (W)w);
2206
2207 fd_change (EV_A_ w->fd, 1);
2208
2209 EV_FREQUENT_CHECK;
2210}
2211
2212void noinline
2213ev_timer_start (EV_P_ ev_timer *w)
2214{
2215 if (expect_false (ev_is_active (w)))
2216 return;
2217
2218 ev_at (w) += mn_now;
2219
2220 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2221
2222 EV_FREQUENT_CHECK;
2223
2224 ++timercnt;
2225 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2226 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2227 ANHE_w (timers [ev_active (w)]) = (WT)w;
2228 ANHE_at_cache (timers [ev_active (w)]);
2229 upheap (timers, ev_active (w));
2230
2231 EV_FREQUENT_CHECK;
2232
2233 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2234}
2235
2236void noinline
2237ev_timer_stop (EV_P_ ev_timer *w)
2238{
2239 clear_pending (EV_A_ (W)w);
2240 if (expect_false (!ev_is_active (w)))
2241 return;
2242
2243 EV_FREQUENT_CHECK;
2244
2245 {
2246 int active = ev_active (w);
2247
2248 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2249
2250 --timercnt;
2251
2252 if (expect_true (active < timercnt + HEAP0))
2253 {
2254 timers [active] = timers [timercnt + HEAP0];
2255 adjustheap (timers, timercnt, active);
2256 }
2257 }
2258
2259 EV_FREQUENT_CHECK;
2260
2261 ev_at (w) -= mn_now;
2262
2263 ev_stop (EV_A_ (W)w);
2264}
2265
2266void noinline
2267ev_timer_again (EV_P_ ev_timer *w)
2268{
2269 EV_FREQUENT_CHECK;
2270
2271 if (ev_is_active (w))
2272 {
2273 if (w->repeat)
2274 {
2275 ev_at (w) = mn_now + w->repeat;
2276 ANHE_at_cache (timers [ev_active (w)]);
2277 adjustheap (timers, timercnt, ev_active (w));
2278 }
2279 else
2280 ev_timer_stop (EV_A_ w);
2281 }
2282 else if (w->repeat)
2283 {
2284 ev_at (w) = w->repeat;
2285 ev_timer_start (EV_A_ w);
2286 }
2287
2288 EV_FREQUENT_CHECK;
2289}
2290
2291#if EV_PERIODIC_ENABLE
2292void noinline
2293ev_periodic_start (EV_P_ ev_periodic *w)
2294{
2295 if (expect_false (ev_is_active (w)))
2296 return;
2297
2298 if (w->reschedule_cb)
2299 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2300 else if (w->interval)
2301 {
2302 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2303 /* this formula differs from the one in periodic_reify because we do not always round up */
2304 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2305 }
2306 else
2307 ev_at (w) = w->offset;
2308
2309 EV_FREQUENT_CHECK;
2310
2311 ++periodiccnt;
2312 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2313 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2314 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2315 ANHE_at_cache (periodics [ev_active (w)]);
2316 upheap (periodics, ev_active (w));
2317
2318 EV_FREQUENT_CHECK;
2319
2320 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2321}
2322
2323void noinline
2324ev_periodic_stop (EV_P_ ev_periodic *w)
2325{
2326 clear_pending (EV_A_ (W)w);
2327 if (expect_false (!ev_is_active (w)))
2328 return;
2329
2330 EV_FREQUENT_CHECK;
2331
2332 {
2333 int active = ev_active (w);
2334
2335 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2336
2337 --periodiccnt;
2338
2339 if (expect_true (active < periodiccnt + HEAP0))
2340 {
2341 periodics [active] = periodics [periodiccnt + HEAP0];
2342 adjustheap (periodics, periodiccnt, active);
2343 }
2344 }
2345
2346 EV_FREQUENT_CHECK;
2347
2348 ev_stop (EV_A_ (W)w);
2349}
2350
2351void noinline
2352ev_periodic_again (EV_P_ ev_periodic *w)
2353{
2354 /* TODO: use adjustheap and recalculation */
2355 ev_periodic_stop (EV_A_ w);
2356 ev_periodic_start (EV_A_ w);
2357}
2358#endif
2359
2360#ifndef SA_RESTART
2361# define SA_RESTART 0
2362#endif
2363
2364void noinline
2365ev_signal_start (EV_P_ ev_signal *w)
2366{
2367#if EV_MULTIPLICITY
2368 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2369#endif
2370 if (expect_false (ev_is_active (w)))
2371 return;
2372
2373 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2374
2375 evpipe_init (EV_A);
2376
2377 EV_FREQUENT_CHECK;
2378
2379 {
2380#ifndef _WIN32
2381 sigset_t full, prev;
2382 sigfillset (&full);
2383 sigprocmask (SIG_SETMASK, &full, &prev);
2384#endif
2385
2386 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2387
2388#ifndef _WIN32
2389 sigprocmask (SIG_SETMASK, &prev, 0);
2390#endif
2391 }
2392
2393 ev_start (EV_A_ (W)w, 1);
2394 wlist_add (&signals [w->signum - 1].head, (WL)w);
2395
2396 if (!((WL)w)->next)
2397 {
2398#if _WIN32
2399 signal (w->signum, ev_sighandler);
2400#else
2401 struct sigaction sa;
2402 sa.sa_handler = ev_sighandler;
2403 sigfillset (&sa.sa_mask);
2404 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2405 sigaction (w->signum, &sa, 0);
2406#endif
2407 }
2408
2409 EV_FREQUENT_CHECK;
2410}
2411
2412void noinline
2413ev_signal_stop (EV_P_ ev_signal *w)
2414{
2415 clear_pending (EV_A_ (W)w);
2416 if (expect_false (!ev_is_active (w)))
2417 return;
2418
2419 EV_FREQUENT_CHECK;
2420
2421 wlist_del (&signals [w->signum - 1].head, (WL)w);
2422 ev_stop (EV_A_ (W)w);
2423
2424 if (!signals [w->signum - 1].head)
2425 signal (w->signum, SIG_DFL);
2426
2427 EV_FREQUENT_CHECK;
2428}
2429
2430void
2431ev_child_start (EV_P_ ev_child *w)
2432{
2433#if EV_MULTIPLICITY
2434 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2435#endif
2436 if (expect_false (ev_is_active (w)))
2437 return;
2438
2439 EV_FREQUENT_CHECK;
2440
2441 ev_start (EV_A_ (W)w, 1);
2442 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2443
2444 EV_FREQUENT_CHECK;
2445}
2446
2447void
2448ev_child_stop (EV_P_ ev_child *w)
2449{
2450 clear_pending (EV_A_ (W)w);
2451 if (expect_false (!ev_is_active (w)))
2452 return;
2453
2454 EV_FREQUENT_CHECK;
2455
2456 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2457 ev_stop (EV_A_ (W)w);
2458
2459 EV_FREQUENT_CHECK;
2460}
2461
2462#if EV_STAT_ENABLE
2463
2464# ifdef _WIN32
2465# undef lstat
2466# define lstat(a,b) _stati64 (a,b)
2467# endif
2468
2469#define DEF_STAT_INTERVAL 5.0074891
2470#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2471#define MIN_STAT_INTERVAL 0.1074891
2472
2473static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2474
2475#if EV_USE_INOTIFY
2476# define EV_INOTIFY_BUFSIZE 8192
2477
2478static void noinline
2479infy_add (EV_P_ ev_stat *w)
2480{
2481 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);
2482
2483 if (w->wd < 0)
2484 {
2485 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2486 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2487
2488 /* monitor some parent directory for speedup hints */
2489 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2490 /* but an efficiency issue only */
2491 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2492 {
2493 char path [4096];
2494 strcpy (path, w->path);
2495
2496 do
2497 {
2498 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2499 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2500
2501 char *pend = strrchr (path, '/');
2502
2503 if (!pend || pend == path)
2504 break;
2505
2506 *pend = 0;
2507 w->wd = inotify_add_watch (fs_fd, path, mask);
2508 }
2509 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2510 }
2511 }
2512
2513 if (w->wd >= 0)
2514 {
2515 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2516
2517 /* now local changes will be tracked by inotify, but remote changes won't */
2518 /* unless the filesystem it known to be local, we therefore still poll */
2519 /* also do poll on <2.6.25, but with normal frequency */
2520 struct statfs sfs;
2521
2522 if (fs_2625 && !statfs (w->path, &sfs))
2523 if (sfs.f_type == 0x1373 /* devfs */
2524 || sfs.f_type == 0xEF53 /* ext2/3 */
2525 || sfs.f_type == 0x3153464a /* jfs */
2526 || sfs.f_type == 0x52654973 /* reiser3 */
2527 || sfs.f_type == 0x01021994 /* tempfs */
2528 || sfs.f_type == 0x58465342 /* xfs */)
2529 return;
2530
2531 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2532 ev_timer_again (EV_A_ &w->timer);
2533 }
2534}
2535
2536static void noinline
2537infy_del (EV_P_ ev_stat *w)
2538{
2539 int slot;
2540 int wd = w->wd;
2541
2542 if (wd < 0)
2543 return;
2544
2545 w->wd = -2;
2546 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2547 wlist_del (&fs_hash [slot].head, (WL)w);
2548
2549 /* remove this watcher, if others are watching it, they will rearm */
2550 inotify_rm_watch (fs_fd, wd);
2551}
2552
2553static void noinline
2554infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2555{
2556 if (slot < 0)
2557 /* overflow, need to check for all hash slots */
2558 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2559 infy_wd (EV_A_ slot, wd, ev);
2560 else
2561 {
2562 WL w_;
2563
2564 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2565 {
2566 ev_stat *w = (ev_stat *)w_;
2567 w_ = w_->next; /* lets us remove this watcher and all before it */
2568
2569 if (w->wd == wd || wd == -1)
2570 {
2571 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2572 {
2573 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2574 w->wd = -1;
2575 infy_add (EV_A_ w); /* re-add, no matter what */
2576 }
2577
2578 stat_timer_cb (EV_A_ &w->timer, 0);
2579 }
2580 }
2581 }
2582}
2583
346static void 2584static void
347ev_start (struct ev_watcher *w, int active) 2585infy_cb (EV_P_ ev_io *w, int revents)
348{ 2586{
349 w->pending = 0; 2587 char buf [EV_INOTIFY_BUFSIZE];
350 w->active = active; 2588 struct inotify_event *ev = (struct inotify_event *)buf;
2589 int ofs;
2590 int len = read (fs_fd, buf, sizeof (buf));
2591
2592 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2593 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2594}
2595
2596void inline_size
2597check_2625 (EV_P)
2598{
2599 /* kernels < 2.6.25 are borked
2600 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2601 */
2602 struct utsname buf;
2603 int major, minor, micro;
2604
2605 if (uname (&buf))
2606 return;
2607
2608 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2609 return;
2610
2611 if (major < 2
2612 || (major == 2 && minor < 6)
2613 || (major == 2 && minor == 6 && micro < 25))
2614 return;
2615
2616 fs_2625 = 1;
2617}
2618
2619void inline_size
2620infy_init (EV_P)
2621{
2622 if (fs_fd != -2)
2623 return;
2624
2625 fs_fd = -1;
2626
2627 check_2625 (EV_A);
2628
2629 fs_fd = inotify_init ();
2630
2631 if (fs_fd >= 0)
2632 {
2633 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2634 ev_set_priority (&fs_w, EV_MAXPRI);
2635 ev_io_start (EV_A_ &fs_w);
2636 }
2637}
2638
2639void inline_size
2640infy_fork (EV_P)
2641{
2642 int slot;
2643
2644 if (fs_fd < 0)
2645 return;
2646
2647 close (fs_fd);
2648 fs_fd = inotify_init ();
2649
2650 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2651 {
2652 WL w_ = fs_hash [slot].head;
2653 fs_hash [slot].head = 0;
2654
2655 while (w_)
2656 {
2657 ev_stat *w = (ev_stat *)w_;
2658 w_ = w_->next; /* lets us add this watcher */
2659
2660 w->wd = -1;
2661
2662 if (fs_fd >= 0)
2663 infy_add (EV_A_ w); /* re-add, no matter what */
2664 else
2665 ev_timer_again (EV_A_ &w->timer);
2666 }
2667 }
2668}
2669
2670#endif
2671
2672#ifdef _WIN32
2673# define EV_LSTAT(p,b) _stati64 (p, b)
2674#else
2675# define EV_LSTAT(p,b) lstat (p, b)
2676#endif
2677
2678void
2679ev_stat_stat (EV_P_ ev_stat *w)
2680{
2681 if (lstat (w->path, &w->attr) < 0)
2682 w->attr.st_nlink = 0;
2683 else if (!w->attr.st_nlink)
2684 w->attr.st_nlink = 1;
2685}
2686
2687static void noinline
2688stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2689{
2690 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2691
2692 /* we copy this here each the time so that */
2693 /* prev has the old value when the callback gets invoked */
2694 w->prev = w->attr;
2695 ev_stat_stat (EV_A_ w);
2696
2697 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2698 if (
2699 w->prev.st_dev != w->attr.st_dev
2700 || w->prev.st_ino != w->attr.st_ino
2701 || w->prev.st_mode != w->attr.st_mode
2702 || w->prev.st_nlink != w->attr.st_nlink
2703 || w->prev.st_uid != w->attr.st_uid
2704 || w->prev.st_gid != w->attr.st_gid
2705 || w->prev.st_rdev != w->attr.st_rdev
2706 || w->prev.st_size != w->attr.st_size
2707 || w->prev.st_atime != w->attr.st_atime
2708 || w->prev.st_mtime != w->attr.st_mtime
2709 || w->prev.st_ctime != w->attr.st_ctime
2710 ) {
2711 #if EV_USE_INOTIFY
2712 if (fs_fd >= 0)
2713 {
2714 infy_del (EV_A_ w);
2715 infy_add (EV_A_ w);
2716 ev_stat_stat (EV_A_ w); /* avoid race... */
2717 }
2718 #endif
2719
2720 ev_feed_event (EV_A_ w, EV_STAT);
2721 }
2722}
2723
2724void
2725ev_stat_start (EV_P_ ev_stat *w)
2726{
2727 if (expect_false (ev_is_active (w)))
2728 return;
2729
2730 ev_stat_stat (EV_A_ w);
2731
2732 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2733 w->interval = MIN_STAT_INTERVAL;
2734
2735 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2736 ev_set_priority (&w->timer, ev_priority (w));
2737
2738#if EV_USE_INOTIFY
2739 infy_init (EV_A);
2740
2741 if (fs_fd >= 0)
2742 infy_add (EV_A_ w);
2743 else
2744#endif
2745 ev_timer_again (EV_A_ &w->timer);
2746
2747 ev_start (EV_A_ (W)w, 1);
2748
2749 EV_FREQUENT_CHECK;
2750}
2751
2752void
2753ev_stat_stop (EV_P_ ev_stat *w)
2754{
2755 clear_pending (EV_A_ (W)w);
2756 if (expect_false (!ev_is_active (w)))
2757 return;
2758
2759 EV_FREQUENT_CHECK;
2760
2761#if EV_USE_INOTIFY
2762 infy_del (EV_A_ w);
2763#endif
2764 ev_timer_stop (EV_A_ &w->timer);
2765
2766 ev_stop (EV_A_ (W)w);
2767
2768 EV_FREQUENT_CHECK;
2769}
2770#endif
2771
2772#if EV_IDLE_ENABLE
2773void
2774ev_idle_start (EV_P_ ev_idle *w)
2775{
2776 if (expect_false (ev_is_active (w)))
2777 return;
2778
2779 pri_adjust (EV_A_ (W)w);
2780
2781 EV_FREQUENT_CHECK;
2782
2783 {
2784 int active = ++idlecnt [ABSPRI (w)];
2785
2786 ++idleall;
2787 ev_start (EV_A_ (W)w, active);
2788
2789 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2790 idles [ABSPRI (w)][active - 1] = w;
2791 }
2792
2793 EV_FREQUENT_CHECK;
2794}
2795
2796void
2797ev_idle_stop (EV_P_ ev_idle *w)
2798{
2799 clear_pending (EV_A_ (W)w);
2800 if (expect_false (!ev_is_active (w)))
2801 return;
2802
2803 EV_FREQUENT_CHECK;
2804
2805 {
2806 int active = ev_active (w);
2807
2808 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2809 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2810
2811 ev_stop (EV_A_ (W)w);
2812 --idleall;
2813 }
2814
2815 EV_FREQUENT_CHECK;
2816}
2817#endif
2818
2819void
2820ev_prepare_start (EV_P_ ev_prepare *w)
2821{
2822 if (expect_false (ev_is_active (w)))
2823 return;
2824
2825 EV_FREQUENT_CHECK;
2826
2827 ev_start (EV_A_ (W)w, ++preparecnt);
2828 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2829 prepares [preparecnt - 1] = w;
2830
2831 EV_FREQUENT_CHECK;
2832}
2833
2834void
2835ev_prepare_stop (EV_P_ ev_prepare *w)
2836{
2837 clear_pending (EV_A_ (W)w);
2838 if (expect_false (!ev_is_active (w)))
2839 return;
2840
2841 EV_FREQUENT_CHECK;
2842
2843 {
2844 int active = ev_active (w);
2845
2846 prepares [active - 1] = prepares [--preparecnt];
2847 ev_active (prepares [active - 1]) = active;
2848 }
2849
2850 ev_stop (EV_A_ (W)w);
2851
2852 EV_FREQUENT_CHECK;
2853}
2854
2855void
2856ev_check_start (EV_P_ ev_check *w)
2857{
2858 if (expect_false (ev_is_active (w)))
2859 return;
2860
2861 EV_FREQUENT_CHECK;
2862
2863 ev_start (EV_A_ (W)w, ++checkcnt);
2864 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2865 checks [checkcnt - 1] = w;
2866
2867 EV_FREQUENT_CHECK;
2868}
2869
2870void
2871ev_check_stop (EV_P_ ev_check *w)
2872{
2873 clear_pending (EV_A_ (W)w);
2874 if (expect_false (!ev_is_active (w)))
2875 return;
2876
2877 EV_FREQUENT_CHECK;
2878
2879 {
2880 int active = ev_active (w);
2881
2882 checks [active - 1] = checks [--checkcnt];
2883 ev_active (checks [active - 1]) = active;
2884 }
2885
2886 ev_stop (EV_A_ (W)w);
2887
2888 EV_FREQUENT_CHECK;
2889}
2890
2891#if EV_EMBED_ENABLE
2892void noinline
2893ev_embed_sweep (EV_P_ ev_embed *w)
2894{
2895 ev_loop (w->other, EVLOOP_NONBLOCK);
351} 2896}
352 2897
353static void 2898static void
354ev_stop (struct ev_watcher *w) 2899embed_io_cb (EV_P_ ev_io *io, int revents)
355{ 2900{
356 if (w->pending) 2901 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
357 pendings [w->pending - 1].w = 0;
358 2902
359 w->active = 0;
360 /* nop */
361}
362
363void
364evio_start (struct ev_io *w)
365{
366 if (ev_is_active (w)) 2903 if (ev_cb (w))
2904 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2905 else
2906 ev_loop (w->other, EVLOOP_NONBLOCK);
2907}
2908
2909static void
2910embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2911{
2912 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2913
2914 {
2915 struct ev_loop *loop = w->other;
2916
2917 while (fdchangecnt)
2918 {
2919 fd_reify (EV_A);
2920 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2921 }
2922 }
2923}
2924
2925static void
2926embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2927{
2928 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2929
2930 ev_embed_stop (EV_A_ w);
2931
2932 {
2933 struct ev_loop *loop = w->other;
2934
2935 ev_loop_fork (EV_A);
2936 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2937 }
2938
2939 ev_embed_start (EV_A_ w);
2940}
2941
2942#if 0
2943static void
2944embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2945{
2946 ev_idle_stop (EV_A_ idle);
2947}
2948#endif
2949
2950void
2951ev_embed_start (EV_P_ ev_embed *w)
2952{
2953 if (expect_false (ev_is_active (w)))
367 return; 2954 return;
368 2955
369 int fd = w->fd; 2956 {
2957 struct ev_loop *loop = w->other;
2958 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2959 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2960 }
370 2961
371 ev_start ((struct ev_watcher *)w, 1); 2962 EV_FREQUENT_CHECK;
372 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
373 wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
374 2963
375 ++fdchangecnt; 2964 ev_set_priority (&w->io, ev_priority (w));
376 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 2965 ev_io_start (EV_A_ &w->io);
377 fdchanges [fdchangecnt - 1] = fd;
378}
379 2966
2967 ev_prepare_init (&w->prepare, embed_prepare_cb);
2968 ev_set_priority (&w->prepare, EV_MINPRI);
2969 ev_prepare_start (EV_A_ &w->prepare);
2970
2971 ev_fork_init (&w->fork, embed_fork_cb);
2972 ev_fork_start (EV_A_ &w->fork);
2973
2974 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2975
2976 ev_start (EV_A_ (W)w, 1);
2977
2978 EV_FREQUENT_CHECK;
2979}
2980
380void 2981void
381evio_stop (struct ev_io *w) 2982ev_embed_stop (EV_P_ ev_embed *w)
382{ 2983{
2984 clear_pending (EV_A_ (W)w);
383 if (!ev_is_active (w)) 2985 if (expect_false (!ev_is_active (w)))
384 return; 2986 return;
385 2987
386 wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w); 2988 EV_FREQUENT_CHECK;
387 ev_stop ((struct ev_watcher *)w);
388 2989
389 ++fdchangecnt; 2990 ev_io_stop (EV_A_ &w->io);
390 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 2991 ev_prepare_stop (EV_A_ &w->prepare);
391 fdchanges [fdchangecnt - 1] = w->fd; 2992 ev_fork_stop (EV_A_ &w->fork);
392}
393 2993
2994 EV_FREQUENT_CHECK;
2995}
2996#endif
2997
2998#if EV_FORK_ENABLE
394void 2999void
395evtimer_start (struct ev_timer *w) 3000ev_fork_start (EV_P_ ev_fork *w)
396{ 3001{
397 if (ev_is_active (w)) 3002 if (expect_false (ev_is_active (w)))
398 return; 3003 return;
399 3004
400 fprintf (stderr, "t1 %f a %d\n", w->at, w->is_abs);//D 3005 EV_FREQUENT_CHECK;
401 if (w->is_abs)
402 {
403 if (w->repeat)
404 w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
405 }
406 else
407 w->at += ev_now;
408 fprintf (stderr, "t2 %f a %d\n", w->at, w->is_abs);//D
409 3006
410 ev_start ((struct ev_watcher *)w, ++timercnt); 3007 ev_start (EV_A_ (W)w, ++forkcnt);
411 array_needsize (timers, timermax, timercnt, ); 3008 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
412 timers [timercnt - 1] = w; 3009 forks [forkcnt - 1] = w;
413 upheap (timercnt - 1);
414}
415 3010
3011 EV_FREQUENT_CHECK;
3012}
3013
416void 3014void
417evtimer_stop (struct ev_timer *w) 3015ev_fork_stop (EV_P_ ev_fork *w)
418{ 3016{
3017 clear_pending (EV_A_ (W)w);
419 if (!ev_is_active (w)) 3018 if (expect_false (!ev_is_active (w)))
420 return; 3019 return;
421 3020
422 timers [w->active - 1] = timers [--timercnt]; 3021 EV_FREQUENT_CHECK;
423 downheap (w->active - 1);
424 ev_stop ((struct ev_watcher *)w);
425}
426 3022
3023 {
3024 int active = ev_active (w);
3025
3026 forks [active - 1] = forks [--forkcnt];
3027 ev_active (forks [active - 1]) = active;
3028 }
3029
3030 ev_stop (EV_A_ (W)w);
3031
3032 EV_FREQUENT_CHECK;
3033}
3034#endif
3035
3036#if EV_ASYNC_ENABLE
427void 3037void
428evsignal_start (struct ev_signal *w) 3038ev_async_start (EV_P_ ev_async *w)
429{ 3039{
430 if (ev_is_active (w)) 3040 if (expect_false (ev_is_active (w)))
431 return; 3041 return;
432 3042
433 ev_start ((struct ev_watcher *)w, 1); 3043 evpipe_init (EV_A);
434 array_needsize (signals, signalmax, w->signum, signals_init);
435 wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);
436}
437 3044
3045 EV_FREQUENT_CHECK;
3046
3047 ev_start (EV_A_ (W)w, ++asynccnt);
3048 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3049 asyncs [asynccnt - 1] = w;
3050
3051 EV_FREQUENT_CHECK;
3052}
3053
438void 3054void
439evsignal_stop (struct ev_signal *w) 3055ev_async_stop (EV_P_ ev_async *w)
440{ 3056{
3057 clear_pending (EV_A_ (W)w);
441 if (!ev_is_active (w)) 3058 if (expect_false (!ev_is_active (w)))
442 return; 3059 return;
443 3060
444 wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w); 3061 EV_FREQUENT_CHECK;
445 ev_stop ((struct ev_watcher *)w); 3062
3063 {
3064 int active = ev_active (w);
3065
3066 asyncs [active - 1] = asyncs [--asynccnt];
3067 ev_active (asyncs [active - 1]) = active;
3068 }
3069
3070 ev_stop (EV_A_ (W)w);
3071
3072 EV_FREQUENT_CHECK;
446} 3073}
3074
3075void
3076ev_async_send (EV_P_ ev_async *w)
3077{
3078 w->sent = 1;
3079 evpipe_write (EV_A_ &gotasync);
3080}
3081#endif
447 3082
448/*****************************************************************************/ 3083/*****************************************************************************/
449#if 1 3084
3085struct ev_once
3086{
3087 ev_io io;
3088 ev_timer to;
3089 void (*cb)(int revents, void *arg);
3090 void *arg;
3091};
450 3092
451static void 3093static void
452sin_cb (struct ev_io *w, int revents) 3094once_cb (EV_P_ struct ev_once *once, int revents)
453{ 3095{
454 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 3096 void (*cb)(int revents, void *arg) = once->cb;
3097 void *arg = once->arg;
3098
3099 ev_io_stop (EV_A_ &once->io);
3100 ev_timer_stop (EV_A_ &once->to);
3101 ev_free (once);
3102
3103 cb (revents, arg);
455} 3104}
456 3105
457static void 3106static void
3107once_cb_io (EV_P_ ev_io *w, int revents)
3108{
3109 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3110
3111 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
3112}
3113
3114static void
458ocb (struct ev_timer *w, int revents) 3115once_cb_to (EV_P_ ev_timer *w, int revents)
459{ 3116{
460 fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 3117 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
461}
462 3118
463int main (void) 3119 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
464{ 3120}
465 struct ev_io sin;
466 3121
467 ev_init (0); 3122void
3123ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
3124{
3125 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
468 3126
469 evw_init (&sin, sin_cb, 55); 3127 if (expect_false (!once))
470 evio_set (&sin, 0, EV_READ); 3128 {
471 evio_start (&sin); 3129 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
472
473 struct ev_timer t1;
474 evw_init (&t1, ocb, 1);
475 evtimer_set_rel (&t1, 1, 0);
476 evtimer_start (&t1);
477
478 struct ev_timer t2;
479 evw_init (&t2, ocb, 2);
480 evtimer_set_abs (&t2, ev_time () + 2, 0);
481 evtimer_start (&t2);
482
483 ev_loop (0);
484
485 return 0; 3130 return;
486} 3131 }
487 3132
488#endif 3133 once->cb = cb;
3134 once->arg = arg;
489 3135
3136 ev_init (&once->io, once_cb_io);
3137 if (fd >= 0)
3138 {
3139 ev_io_set (&once->io, fd, events);
3140 ev_io_start (EV_A_ &once->io);
3141 }
490 3142
3143 ev_init (&once->to, once_cb_to);
3144 if (timeout >= 0.)
3145 {
3146 ev_timer_set (&once->to, timeout, 0.);
3147 ev_timer_start (EV_A_ &once->to);
3148 }
3149}
491 3150
3151#if EV_MULTIPLICITY
3152 #include "ev_wrap.h"
3153#endif
492 3154
3155#ifdef __cplusplus
3156}
3157#endif
3158

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