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Comparing libev/ev.c (file contents):
Revision 1.9 by root, Wed Oct 31 07:24:17 2007 UTC vs.
Revision 1.247 by root, Wed May 21 21:22:10 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
146#include <signal.h>
147
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
163# endif
164#endif
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
180#ifndef EV_USE_SELECT
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
189# endif
190#endif
191
192#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1
195# else
196# define EV_USE_EPOLL 0
197# endif
198#endif
199
200#ifndef EV_USE_KQUEUE
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
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
14#ifdef CLOCK_MONOTONIC 250#ifndef CLOCK_MONOTONIC
251# undef EV_USE_MONOTONIC
15# define HAVE_MONOTONIC 1 252# 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>
16#endif 268# endif
269#endif
17 270
18#define HAVE_REALTIME 1 271#if EV_USE_INOTIFY
19#define HAVE_EPOLL 1 272# include <sys/inotify.h>
20#define HAVE_SELECT 1 273#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/*
294 * This is used to avoid floating point rounding problems.
295 * It is added to ev_rt_now when scheduling periodics
296 * to ensure progress, time-wise, even when rounding
297 * errors are against us.
298 * This value is good at least till the year 4000.
299 * Better solutions welcome.
300 */
301#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
21 302
22#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 303#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
23#define MAX_BLOCKTIME 60. 304#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
305/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
24 306
307#if __GNUC__ >= 4
308# define expect(expr,value) __builtin_expect ((expr),(value))
309# define noinline __attribute__ ((noinline))
310#else
311# define expect(expr,value) (expr)
312# define noinline
313# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
314# define inline
315# endif
316#endif
317
318#define expect_false(expr) expect ((expr) != 0, 0)
319#define expect_true(expr) expect ((expr) != 0, 1)
320#define inline_size static inline
321
322#if EV_MINIMAL
323# define inline_speed static noinline
324#else
325# define inline_speed static inline
326#endif
327
328#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
329#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
330
331#define EMPTY /* required for microsofts broken pseudo-c compiler */
332#define EMPTY2(a,b) /* used to suppress some warnings */
333
334typedef ev_watcher *W;
335typedef ev_watcher_list *WL;
336typedef ev_watcher_time *WT;
337
338#define ev_active(w) ((W)(w))->active
339#define ev_at(w) ((WT)(w))->at
340
341#if EV_USE_MONOTONIC
342/* sig_atomic_t is used to avoid per-thread variables or locking but still */
343/* giving it a reasonably high chance of working on typical architetcures */
344static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
345#endif
346
347#ifdef _WIN32
348# include "ev_win32.c"
349#endif
350
351/*****************************************************************************/
352
353static void (*syserr_cb)(const char *msg);
354
355void
356ev_set_syserr_cb (void (*cb)(const char *msg))
357{
358 syserr_cb = cb;
359}
360
361static void noinline
362syserr (const char *msg)
363{
364 if (!msg)
365 msg = "(libev) system error";
366
367 if (syserr_cb)
368 syserr_cb (msg);
369 else
370 {
371 perror (msg);
372 abort ();
373 }
374}
375
376static void *
377ev_realloc_emul (void *ptr, long size)
378{
379 /* some systems, notably openbsd and darwin, fail to properly
380 * implement realloc (x, 0) (as required by both ansi c-98 and
381 * the single unix specification, so work around them here.
382 */
383
384 if (size)
385 return realloc (ptr, size);
386
387 free (ptr);
388 return 0;
389}
390
391static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
392
393void
394ev_set_allocator (void *(*cb)(void *ptr, long size))
395{
396 alloc = cb;
397}
398
399inline_speed void *
400ev_realloc (void *ptr, long size)
401{
402 ptr = alloc (ptr, size);
403
404 if (!ptr && size)
405 {
406 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
407 abort ();
408 }
409
410 return ptr;
411}
412
413#define ev_malloc(size) ev_realloc (0, (size))
414#define ev_free(ptr) ev_realloc ((ptr), 0)
415
416/*****************************************************************************/
417
418typedef struct
419{
420 WL head;
421 unsigned char events;
422 unsigned char reify;
423#if EV_SELECT_IS_WINSOCKET
424 SOCKET handle;
425#endif
426} ANFD;
427
428typedef struct
429{
430 W w;
431 int events;
432} ANPENDING;
433
434#if EV_USE_INOTIFY
435/* hash table entry per inotify-id */
436typedef struct
437{
438 WL head;
439} ANFS;
440#endif
441
442/* Heap Entry */
443#if EV_HEAP_CACHE_AT
444 typedef struct {
445 ev_tstamp at;
446 WT w;
447 } ANHE;
448
449 #define ANHE_w(he) (he).w /* access watcher, read-write */
450 #define ANHE_at(he) (he).at /* access cached at, read-only */
451 #define ANHE_at_set(he) (he).at = (he).w->at /* update at from watcher */
452#else
453 typedef WT ANHE;
454
455 #define ANHE_w(he) (he)
456 #define ANHE_at(he) (he)->at
457 #define ANHE_at_set(he)
458#endif
459
460#if EV_MULTIPLICITY
461
462 struct ev_loop
463 {
464 ev_tstamp ev_rt_now;
465 #define ev_rt_now ((loop)->ev_rt_now)
466 #define VAR(name,decl) decl;
467 #include "ev_vars.h"
468 #undef VAR
469 };
25#include "ev.h" 470 #include "ev_wrap.h"
26 471
27struct ev_watcher { 472 static struct ev_loop default_loop_struct;
28 EV_WATCHER (ev_watcher); 473 struct ev_loop *ev_default_loop_ptr;
29};
30 474
31struct ev_watcher_list { 475#else
32 EV_WATCHER_LIST (ev_watcher_list);
33};
34 476
35static ev_tstamp now, diff; /* monotonic clock */
36ev_tstamp ev_now; 477 ev_tstamp ev_rt_now;
37int ev_method; 478 #define VAR(name,decl) static decl;
479 #include "ev_vars.h"
480 #undef VAR
38 481
39static int have_monotonic; /* runtime */ 482 static int ev_default_loop_ptr;
40 483
41static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 484#endif
42static void (*method_modify)(int fd, int oev, int nev);
43static void (*method_poll)(ev_tstamp timeout);
44 485
45/*****************************************************************************/ 486/*****************************************************************************/
46 487
47ev_tstamp 488ev_tstamp
48ev_time (void) 489ev_time (void)
49{ 490{
50#if HAVE_REALTIME 491#if EV_USE_REALTIME
51 struct timespec ts; 492 struct timespec ts;
52 clock_gettime (CLOCK_REALTIME, &ts); 493 clock_gettime (CLOCK_REALTIME, &ts);
53 return ts.tv_sec + ts.tv_nsec * 1e-9; 494 return ts.tv_sec + ts.tv_nsec * 1e-9;
54#else 495#else
55 struct timeval tv; 496 struct timeval tv;
56 gettimeofday (&tv, 0); 497 gettimeofday (&tv, 0);
57 return tv.tv_sec + tv.tv_usec * 1e-6; 498 return tv.tv_sec + tv.tv_usec * 1e-6;
58#endif 499#endif
59} 500}
60 501
61static ev_tstamp 502ev_tstamp inline_size
62get_clock (void) 503get_clock (void)
63{ 504{
64#if HAVE_MONOTONIC 505#if EV_USE_MONOTONIC
65 if (have_monotonic) 506 if (expect_true (have_monotonic))
66 { 507 {
67 struct timespec ts; 508 struct timespec ts;
68 clock_gettime (CLOCK_MONOTONIC, &ts); 509 clock_gettime (CLOCK_MONOTONIC, &ts);
69 return ts.tv_sec + ts.tv_nsec * 1e-9; 510 return ts.tv_sec + ts.tv_nsec * 1e-9;
70 } 511 }
71#endif 512#endif
72 513
73 return ev_time (); 514 return ev_time ();
74} 515}
75 516
76#define array_needsize(base,cur,cnt,init) \ 517#if EV_MULTIPLICITY
77 if ((cnt) > cur) \ 518ev_tstamp
78 { \ 519ev_now (EV_P)
79 int newcnt = cur ? cur << 1 : 16; \ 520{
80 fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\ 521 return ev_rt_now;
81 base = realloc (base, sizeof (*base) * (newcnt)); \ 522}
82 init (base + cur, newcnt - cur); \ 523#endif
83 cur = newcnt; \ 524
525void
526ev_sleep (ev_tstamp delay)
527{
528 if (delay > 0.)
84 } 529 {
530#if EV_USE_NANOSLEEP
531 struct timespec ts;
532
533 ts.tv_sec = (time_t)delay;
534 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
535
536 nanosleep (&ts, 0);
537#elif defined(_WIN32)
538 Sleep ((unsigned long)(delay * 1e3));
539#else
540 struct timeval tv;
541
542 tv.tv_sec = (time_t)delay;
543 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
544
545 select (0, 0, 0, 0, &tv);
546#endif
547 }
548}
85 549
86/*****************************************************************************/ 550/*****************************************************************************/
87 551
552#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
553
554int inline_size
555array_nextsize (int elem, int cur, int cnt)
556{
557 int ncur = cur + 1;
558
559 do
560 ncur <<= 1;
561 while (cnt > ncur);
562
563 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
564 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
565 {
566 ncur *= elem;
567 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
568 ncur = ncur - sizeof (void *) * 4;
569 ncur /= elem;
570 }
571
572 return ncur;
573}
574
575static noinline void *
576array_realloc (int elem, void *base, int *cur, int cnt)
577{
578 *cur = array_nextsize (elem, *cur, cnt);
579 return ev_realloc (base, elem * *cur);
580}
581
582#define array_needsize(type,base,cur,cnt,init) \
583 if (expect_false ((cnt) > (cur))) \
584 { \
585 int ocur_ = (cur); \
586 (base) = (type *)array_realloc \
587 (sizeof (type), (base), &(cur), (cnt)); \
588 init ((base) + (ocur_), (cur) - ocur_); \
589 }
590
591#if 0
592#define array_slim(type,stem) \
593 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
594 { \
595 stem ## max = array_roundsize (stem ## cnt >> 1); \
596 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
597 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
598 }
599#endif
600
601#define array_free(stem, idx) \
602 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
603
604/*****************************************************************************/
605
606void noinline
607ev_feed_event (EV_P_ void *w, int revents)
608{
609 W w_ = (W)w;
610 int pri = ABSPRI (w_);
611
612 if (expect_false (w_->pending))
613 pendings [pri][w_->pending - 1].events |= revents;
614 else
615 {
616 w_->pending = ++pendingcnt [pri];
617 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
618 pendings [pri][w_->pending - 1].w = w_;
619 pendings [pri][w_->pending - 1].events = revents;
620 }
621}
622
623void inline_speed
624queue_events (EV_P_ W *events, int eventcnt, int type)
625{
626 int i;
627
628 for (i = 0; i < eventcnt; ++i)
629 ev_feed_event (EV_A_ events [i], type);
630}
631
632/*****************************************************************************/
633
634void inline_size
635anfds_init (ANFD *base, int count)
636{
637 while (count--)
638 {
639 base->head = 0;
640 base->events = EV_NONE;
641 base->reify = 0;
642
643 ++base;
644 }
645}
646
647void inline_speed
648fd_event (EV_P_ int fd, int revents)
649{
650 ANFD *anfd = anfds + fd;
651 ev_io *w;
652
653 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
654 {
655 int ev = w->events & revents;
656
657 if (ev)
658 ev_feed_event (EV_A_ (W)w, ev);
659 }
660}
661
662void
663ev_feed_fd_event (EV_P_ int fd, int revents)
664{
665 if (fd >= 0 && fd < anfdmax)
666 fd_event (EV_A_ fd, revents);
667}
668
669void inline_size
670fd_reify (EV_P)
671{
672 int i;
673
674 for (i = 0; i < fdchangecnt; ++i)
675 {
676 int fd = fdchanges [i];
677 ANFD *anfd = anfds + fd;
678 ev_io *w;
679
680 unsigned char events = 0;
681
682 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
683 events |= (unsigned char)w->events;
684
685#if EV_SELECT_IS_WINSOCKET
686 if (events)
687 {
688 unsigned long argp;
689 #ifdef EV_FD_TO_WIN32_HANDLE
690 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
691 #else
692 anfd->handle = _get_osfhandle (fd);
693 #endif
694 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
695 }
696#endif
697
698 {
699 unsigned char o_events = anfd->events;
700 unsigned char o_reify = anfd->reify;
701
702 anfd->reify = 0;
703 anfd->events = events;
704
705 if (o_events != events || o_reify & EV_IOFDSET)
706 backend_modify (EV_A_ fd, o_events, events);
707 }
708 }
709
710 fdchangecnt = 0;
711}
712
713void inline_size
714fd_change (EV_P_ int fd, int flags)
715{
716 unsigned char reify = anfds [fd].reify;
717 anfds [fd].reify |= flags;
718
719 if (expect_true (!reify))
720 {
721 ++fdchangecnt;
722 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
723 fdchanges [fdchangecnt - 1] = fd;
724 }
725}
726
727void inline_speed
728fd_kill (EV_P_ int fd)
729{
730 ev_io *w;
731
732 while ((w = (ev_io *)anfds [fd].head))
733 {
734 ev_io_stop (EV_A_ w);
735 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
736 }
737}
738
739int inline_size
740fd_valid (int fd)
741{
742#ifdef _WIN32
743 return _get_osfhandle (fd) != -1;
744#else
745 return fcntl (fd, F_GETFD) != -1;
746#endif
747}
748
749/* called on EBADF to verify fds */
750static void noinline
751fd_ebadf (EV_P)
752{
753 int fd;
754
755 for (fd = 0; fd < anfdmax; ++fd)
756 if (anfds [fd].events)
757 if (!fd_valid (fd) == -1 && errno == EBADF)
758 fd_kill (EV_A_ fd);
759}
760
761/* called on ENOMEM in select/poll to kill some fds and retry */
762static void noinline
763fd_enomem (EV_P)
764{
765 int fd;
766
767 for (fd = anfdmax; fd--; )
768 if (anfds [fd].events)
769 {
770 fd_kill (EV_A_ fd);
771 return;
772 }
773}
774
775/* usually called after fork if backend needs to re-arm all fds from scratch */
776static void noinline
777fd_rearm_all (EV_P)
778{
779 int fd;
780
781 for (fd = 0; fd < anfdmax; ++fd)
782 if (anfds [fd].events)
783 {
784 anfds [fd].events = 0;
785 fd_change (EV_A_ fd, EV_IOFDSET | 1);
786 }
787}
788
789/*****************************************************************************/
790
791/*
792 * the heap functions want a real array index. array index 0 uis guaranteed to not
793 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
794 * the branching factor of the d-tree.
795 */
796
797/*
798 * at the moment we allow libev the luxury of two heaps,
799 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
800 * which is more cache-efficient.
801 * the difference is about 5% with 50000+ watchers.
802 */
803#if EV_USE_4HEAP
804
805#define DHEAP 4
806#define HEAP0 (DHEAP - 1) /* index of first element in heap */
807#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
808
809/* towards the root */
810void inline_speed
811upheap (ANHE *heap, int k)
812{
813 ANHE he = heap [k];
814
815 for (;;)
816 {
817 int p = HPARENT (k);
818
819 if (p == k || ANHE_at (heap [p]) <= ANHE_at (he))
820 break;
821
822 heap [k] = heap [p];
823 ev_active (ANHE_w (heap [k])) = k;
824 k = p;
825 }
826
827 heap [k] = he;
828 ev_active (ANHE_w (he)) = k;
829}
830
831/* away from the root */
832void inline_speed
833downheap (ANHE *heap, int N, int k)
834{
835 ANHE he = heap [k];
836 ANHE *E = heap + N + HEAP0;
837
838 for (;;)
839 {
840 ev_tstamp minat;
841 ANHE *minpos;
842 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
843
844 // find minimum child
845 if (expect_true (pos + DHEAP - 1 < E))
846 {
847 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
848 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
849 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
850 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
851 }
852 else if (pos < E)
853 {
854 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
855 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
856 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
857 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
858 }
859 else
860 break;
861
862 if (ANHE_at (he) <= minat)
863 break;
864
865 heap [k] = *minpos;
866 ev_active (ANHE_w (*minpos)) = k;
867
868 k = minpos - heap;
869 }
870
871 heap [k] = he;
872 ev_active (ANHE_w (he)) = k;
873}
874
875#else // 4HEAP
876
877#define HEAP0 1
878#define HPARENT(k) ((k) >> 1)
879
880/* towards the root */
881void inline_speed
882upheap (ANHE *heap, int k)
883{
884 ANHE he = heap [k];
885
886 for (;;)
887 {
888 int p = HPARENT (k);
889
890 /* maybe we could use a dummy element at heap [0]? */
891 if (!p || ANHE_at (heap [p]) <= ANHE_at (he))
892 break;
893
894 heap [k] = heap [p];
895 ev_active (ANHE_w (heap [k])) = k;
896 k = p;
897 }
898
899 heap [k] = he;
900 ev_active (ANHE_w (heap [k])) = k;
901}
902
903/* away from the root */
904void inline_speed
905downheap (ANHE *heap, int N, int k)
906{
907 ANHE he = heap [k];
908
909 for (;;)
910 {
911 int c = k << 1;
912
913 if (c > N)
914 break;
915
916 c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
917 ? 1 : 0;
918
919 if (ANHE_at (he) <= ANHE_at (heap [c]))
920 break;
921
922 heap [k] = heap [c];
923 ev_active (ANHE_w (heap [k])) = k;
924
925 k = c;
926 }
927
928 heap [k] = he;
929 ev_active (ANHE_w (he)) = k;
930}
931#endif
932
933void inline_size
934adjustheap (ANHE *heap, int N, int k)
935{
936 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
937 upheap (heap, k);
938 else
939 downheap (heap, N, k);
940}
941
942/*****************************************************************************/
943
88typedef struct 944typedef struct
89{ 945{
90 struct ev_io *head; 946 WL head;
91 unsigned char wev, rev; /* want, received event set */ 947 EV_ATOMIC_T gotsig;
92} ANFD;
93
94static ANFD *anfds;
95static int anfdmax;
96
97static int *fdchanges;
98static int fdchangemax, fdchangecnt;
99
100static void
101anfds_init (ANFD *base, int count)
102{
103 while (count--)
104 {
105 base->head = 0;
106 base->wev = base->rev = EV_NONE;
107 ++base;
108 }
109}
110
111typedef struct
112{
113 struct ev_watcher *w;
114 int events;
115} ANPENDING;
116
117static ANPENDING *pendings;
118static int pendingmax, pendingcnt;
119
120static void
121event (struct ev_watcher *w, int events)
122{
123 w->pending = ++pendingcnt;
124 array_needsize (pendings, pendingmax, pendingcnt, );
125 pendings [pendingcnt - 1].w = w;
126 pendings [pendingcnt - 1].events = events;
127}
128
129static void
130fd_event (int fd, int events)
131{
132 ANFD *anfd = anfds + fd;
133 struct ev_io *w;
134
135 for (w = anfd->head; w; w = w->next)
136 {
137 int ev = w->events & events;
138
139 if (ev)
140 event ((struct ev_watcher *)w, ev);
141 }
142}
143
144static void
145queue_events (struct ev_watcher **events, int eventcnt, int type)
146{
147 int i;
148
149 for (i = 0; i < eventcnt; ++i)
150 event (events [i], type);
151}
152
153/*****************************************************************************/
154
155static struct ev_timer **atimers;
156static int atimermax, atimercnt;
157
158static struct ev_timer **rtimers;
159static int rtimermax, rtimercnt;
160
161static void
162upheap (struct ev_timer **timers, int k)
163{
164 struct ev_timer *w = timers [k];
165
166 while (k && timers [k >> 1]->at > w->at)
167 {
168 timers [k] = timers [k >> 1];
169 timers [k]->active = k + 1;
170 k >>= 1;
171 }
172
173 timers [k] = w;
174 timers [k]->active = k + 1;
175
176}
177
178static void
179downheap (struct ev_timer **timers, int N, int k)
180{
181 struct ev_timer *w = timers [k];
182
183 while (k < (N >> 1))
184 {
185 int j = k << 1;
186
187 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
188 ++j;
189
190 if (w->at <= timers [j]->at)
191 break;
192
193 timers [k] = timers [j];
194 timers [k]->active = k + 1;
195 k = j;
196 }
197
198 timers [k] = w;
199 timers [k]->active = k + 1;
200}
201
202/*****************************************************************************/
203
204typedef struct
205{
206 struct ev_signal *head;
207 sig_atomic_t gotsig;
208} ANSIG; 948} ANSIG;
209 949
210static ANSIG *signals; 950static ANSIG *signals;
211static int signalmax; 951static int signalmax;
212 952
213static int sigpipe [2]; 953static EV_ATOMIC_T gotsig;
214static sig_atomic_t gotsig;
215static struct ev_io sigev;
216 954
217static void 955void inline_size
218signals_init (ANSIG *base, int count) 956signals_init (ANSIG *base, int count)
219{ 957{
220 while (count--) 958 while (count--)
221 { 959 {
222 base->head = 0; 960 base->head = 0;
223 base->gotsig = 0; 961 base->gotsig = 0;
962
224 ++base; 963 ++base;
225 } 964 }
226} 965}
227 966
967/*****************************************************************************/
968
969void inline_speed
970fd_intern (int fd)
971{
972#ifdef _WIN32
973 int arg = 1;
974 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
975#else
976 fcntl (fd, F_SETFD, FD_CLOEXEC);
977 fcntl (fd, F_SETFL, O_NONBLOCK);
978#endif
979}
980
981static void noinline
982evpipe_init (EV_P)
983{
984 if (!ev_is_active (&pipeev))
985 {
986#if EV_USE_EVENTFD
987 if ((evfd = eventfd (0, 0)) >= 0)
988 {
989 evpipe [0] = -1;
990 fd_intern (evfd);
991 ev_io_set (&pipeev, evfd, EV_READ);
992 }
993 else
994#endif
995 {
996 while (pipe (evpipe))
997 syserr ("(libev) error creating signal/async pipe");
998
999 fd_intern (evpipe [0]);
1000 fd_intern (evpipe [1]);
1001 ev_io_set (&pipeev, evpipe [0], EV_READ);
1002 }
1003
1004 ev_io_start (EV_A_ &pipeev);
1005 ev_unref (EV_A); /* watcher should not keep loop alive */
1006 }
1007}
1008
1009void inline_size
1010evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1011{
1012 if (!*flag)
1013 {
1014 int old_errno = errno; /* save errno because write might clobber it */
1015
1016 *flag = 1;
1017
1018#if EV_USE_EVENTFD
1019 if (evfd >= 0)
1020 {
1021 uint64_t counter = 1;
1022 write (evfd, &counter, sizeof (uint64_t));
1023 }
1024 else
1025#endif
1026 write (evpipe [1], &old_errno, 1);
1027
1028 errno = old_errno;
1029 }
1030}
1031
228static void 1032static void
1033pipecb (EV_P_ ev_io *iow, int revents)
1034{
1035#if EV_USE_EVENTFD
1036 if (evfd >= 0)
1037 {
1038 uint64_t counter;
1039 read (evfd, &counter, sizeof (uint64_t));
1040 }
1041 else
1042#endif
1043 {
1044 char dummy;
1045 read (evpipe [0], &dummy, 1);
1046 }
1047
1048 if (gotsig && ev_is_default_loop (EV_A))
1049 {
1050 int signum;
1051 gotsig = 0;
1052
1053 for (signum = signalmax; signum--; )
1054 if (signals [signum].gotsig)
1055 ev_feed_signal_event (EV_A_ signum + 1);
1056 }
1057
1058#if EV_ASYNC_ENABLE
1059 if (gotasync)
1060 {
1061 int i;
1062 gotasync = 0;
1063
1064 for (i = asynccnt; i--; )
1065 if (asyncs [i]->sent)
1066 {
1067 asyncs [i]->sent = 0;
1068 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1069 }
1070 }
1071#endif
1072}
1073
1074/*****************************************************************************/
1075
1076static void
229sighandler (int signum) 1077ev_sighandler (int signum)
230{ 1078{
1079#if EV_MULTIPLICITY
1080 struct ev_loop *loop = &default_loop_struct;
1081#endif
1082
1083#if _WIN32
1084 signal (signum, ev_sighandler);
1085#endif
1086
231 signals [signum - 1].gotsig = 1; 1087 signals [signum - 1].gotsig = 1;
1088 evpipe_write (EV_A_ &gotsig);
1089}
232 1090
233 if (!gotsig) 1091void noinline
1092ev_feed_signal_event (EV_P_ int signum)
1093{
1094 WL w;
1095
1096#if EV_MULTIPLICITY
1097 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1098#endif
1099
1100 --signum;
1101
1102 if (signum < 0 || signum >= signalmax)
1103 return;
1104
1105 signals [signum].gotsig = 0;
1106
1107 for (w = signals [signum].head; w; w = w->next)
1108 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1109}
1110
1111/*****************************************************************************/
1112
1113static WL childs [EV_PID_HASHSIZE];
1114
1115#ifndef _WIN32
1116
1117static ev_signal childev;
1118
1119#ifndef WIFCONTINUED
1120# define WIFCONTINUED(status) 0
1121#endif
1122
1123void inline_speed
1124child_reap (EV_P_ int chain, int pid, int status)
1125{
1126 ev_child *w;
1127 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1128
1129 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1130 {
1131 if ((w->pid == pid || !w->pid)
1132 && (!traced || (w->flags & 1)))
1133 {
1134 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1135 w->rpid = pid;
1136 w->rstatus = status;
1137 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1138 }
1139 }
1140}
1141
1142#ifndef WCONTINUED
1143# define WCONTINUED 0
1144#endif
1145
1146static void
1147childcb (EV_P_ ev_signal *sw, int revents)
1148{
1149 int pid, status;
1150
1151 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1152 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1153 if (!WCONTINUED
1154 || errno != EINVAL
1155 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1156 return;
1157
1158 /* make sure we are called again until all children have been reaped */
1159 /* we need to do it this way so that the callback gets called before we continue */
1160 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1161
1162 child_reap (EV_A_ pid, pid, status);
1163 if (EV_PID_HASHSIZE > 1)
1164 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1165}
1166
1167#endif
1168
1169/*****************************************************************************/
1170
1171#if EV_USE_PORT
1172# include "ev_port.c"
1173#endif
1174#if EV_USE_KQUEUE
1175# include "ev_kqueue.c"
1176#endif
1177#if EV_USE_EPOLL
1178# include "ev_epoll.c"
1179#endif
1180#if EV_USE_POLL
1181# include "ev_poll.c"
1182#endif
1183#if EV_USE_SELECT
1184# include "ev_select.c"
1185#endif
1186
1187int
1188ev_version_major (void)
1189{
1190 return EV_VERSION_MAJOR;
1191}
1192
1193int
1194ev_version_minor (void)
1195{
1196 return EV_VERSION_MINOR;
1197}
1198
1199/* return true if we are running with elevated privileges and should ignore env variables */
1200int inline_size
1201enable_secure (void)
1202{
1203#ifdef _WIN32
1204 return 0;
1205#else
1206 return getuid () != geteuid ()
1207 || getgid () != getegid ();
1208#endif
1209}
1210
1211unsigned int
1212ev_supported_backends (void)
1213{
1214 unsigned int flags = 0;
1215
1216 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1217 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1218 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1219 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1220 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1221
1222 return flags;
1223}
1224
1225unsigned int
1226ev_recommended_backends (void)
1227{
1228 unsigned int flags = ev_supported_backends ();
1229
1230#ifndef __NetBSD__
1231 /* kqueue is borked on everything but netbsd apparently */
1232 /* it usually doesn't work correctly on anything but sockets and pipes */
1233 flags &= ~EVBACKEND_KQUEUE;
1234#endif
1235#ifdef __APPLE__
1236 // flags &= ~EVBACKEND_KQUEUE; for documentation
1237 flags &= ~EVBACKEND_POLL;
1238#endif
1239
1240 return flags;
1241}
1242
1243unsigned int
1244ev_embeddable_backends (void)
1245{
1246 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1247
1248 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1249 /* please fix it and tell me how to detect the fix */
1250 flags &= ~EVBACKEND_EPOLL;
1251
1252 return flags;
1253}
1254
1255unsigned int
1256ev_backend (EV_P)
1257{
1258 return backend;
1259}
1260
1261unsigned int
1262ev_loop_count (EV_P)
1263{
1264 return loop_count;
1265}
1266
1267void
1268ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1269{
1270 io_blocktime = interval;
1271}
1272
1273void
1274ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1275{
1276 timeout_blocktime = interval;
1277}
1278
1279static void noinline
1280loop_init (EV_P_ unsigned int flags)
1281{
1282 if (!backend)
1283 {
1284#if EV_USE_MONOTONIC
234 { 1285 {
1286 struct timespec ts;
1287 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1288 have_monotonic = 1;
1289 }
1290#endif
1291
1292 ev_rt_now = ev_time ();
1293 mn_now = get_clock ();
1294 now_floor = mn_now;
1295 rtmn_diff = ev_rt_now - mn_now;
1296
1297 io_blocktime = 0.;
1298 timeout_blocktime = 0.;
1299 backend = 0;
1300 backend_fd = -1;
1301 gotasync = 0;
1302#if EV_USE_INOTIFY
1303 fs_fd = -2;
1304#endif
1305
1306 /* pid check not overridable via env */
1307#ifndef _WIN32
1308 if (flags & EVFLAG_FORKCHECK)
1309 curpid = getpid ();
1310#endif
1311
1312 if (!(flags & EVFLAG_NOENV)
1313 && !enable_secure ()
1314 && getenv ("LIBEV_FLAGS"))
1315 flags = atoi (getenv ("LIBEV_FLAGS"));
1316
1317 if (!(flags & 0x0000ffffU))
1318 flags |= ev_recommended_backends ();
1319
1320#if EV_USE_PORT
1321 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1322#endif
1323#if EV_USE_KQUEUE
1324 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1325#endif
1326#if EV_USE_EPOLL
1327 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1328#endif
1329#if EV_USE_POLL
1330 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1331#endif
1332#if EV_USE_SELECT
1333 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1334#endif
1335
1336 ev_init (&pipeev, pipecb);
1337 ev_set_priority (&pipeev, EV_MAXPRI);
1338 }
1339}
1340
1341static void noinline
1342loop_destroy (EV_P)
1343{
1344 int i;
1345
1346 if (ev_is_active (&pipeev))
1347 {
1348 ev_ref (EV_A); /* signal watcher */
1349 ev_io_stop (EV_A_ &pipeev);
1350
1351#if EV_USE_EVENTFD
1352 if (evfd >= 0)
1353 close (evfd);
1354#endif
1355
1356 if (evpipe [0] >= 0)
1357 {
1358 close (evpipe [0]);
1359 close (evpipe [1]);
1360 }
1361 }
1362
1363#if EV_USE_INOTIFY
1364 if (fs_fd >= 0)
1365 close (fs_fd);
1366#endif
1367
1368 if (backend_fd >= 0)
1369 close (backend_fd);
1370
1371#if EV_USE_PORT
1372 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1373#endif
1374#if EV_USE_KQUEUE
1375 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1376#endif
1377#if EV_USE_EPOLL
1378 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1379#endif
1380#if EV_USE_POLL
1381 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1382#endif
1383#if EV_USE_SELECT
1384 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1385#endif
1386
1387 for (i = NUMPRI; i--; )
1388 {
1389 array_free (pending, [i]);
1390#if EV_IDLE_ENABLE
1391 array_free (idle, [i]);
1392#endif
1393 }
1394
1395 ev_free (anfds); anfdmax = 0;
1396
1397 /* have to use the microsoft-never-gets-it-right macro */
1398 array_free (fdchange, EMPTY);
1399 array_free (timer, EMPTY);
1400#if EV_PERIODIC_ENABLE
1401 array_free (periodic, EMPTY);
1402#endif
1403#if EV_FORK_ENABLE
1404 array_free (fork, EMPTY);
1405#endif
1406 array_free (prepare, EMPTY);
1407 array_free (check, EMPTY);
1408#if EV_ASYNC_ENABLE
1409 array_free (async, EMPTY);
1410#endif
1411
1412 backend = 0;
1413}
1414
1415#if EV_USE_INOTIFY
1416void inline_size infy_fork (EV_P);
1417#endif
1418
1419void inline_size
1420loop_fork (EV_P)
1421{
1422#if EV_USE_PORT
1423 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1424#endif
1425#if EV_USE_KQUEUE
1426 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1427#endif
1428#if EV_USE_EPOLL
1429 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1430#endif
1431#if EV_USE_INOTIFY
1432 infy_fork (EV_A);
1433#endif
1434
1435 if (ev_is_active (&pipeev))
1436 {
1437 /* this "locks" the handlers against writing to the pipe */
1438 /* while we modify the fd vars */
235 gotsig = 1; 1439 gotsig = 1;
236 write (sigpipe [1], &gotsig, 1); 1440#if EV_ASYNC_ENABLE
1441 gotasync = 1;
1442#endif
1443
1444 ev_ref (EV_A);
1445 ev_io_stop (EV_A_ &pipeev);
1446
1447#if EV_USE_EVENTFD
1448 if (evfd >= 0)
1449 close (evfd);
1450#endif
1451
1452 if (evpipe [0] >= 0)
1453 {
1454 close (evpipe [0]);
1455 close (evpipe [1]);
1456 }
1457
1458 evpipe_init (EV_A);
1459 /* now iterate over everything, in case we missed something */
1460 pipecb (EV_A_ &pipeev, EV_READ);
1461 }
1462
1463 postfork = 0;
1464}
1465
1466#if EV_MULTIPLICITY
1467struct ev_loop *
1468ev_loop_new (unsigned int flags)
1469{
1470 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1471
1472 memset (loop, 0, sizeof (struct ev_loop));
1473
1474 loop_init (EV_A_ flags);
1475
1476 if (ev_backend (EV_A))
1477 return loop;
1478
1479 return 0;
1480}
1481
1482void
1483ev_loop_destroy (EV_P)
1484{
1485 loop_destroy (EV_A);
1486 ev_free (loop);
1487}
1488
1489void
1490ev_loop_fork (EV_P)
1491{
1492 postfork = 1; /* must be in line with ev_default_fork */
1493}
1494#endif
1495
1496#if EV_MULTIPLICITY
1497struct ev_loop *
1498ev_default_loop_init (unsigned int flags)
1499#else
1500int
1501ev_default_loop (unsigned int flags)
1502#endif
1503{
1504 if (!ev_default_loop_ptr)
237 } 1505 {
238} 1506#if EV_MULTIPLICITY
1507 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1508#else
1509 ev_default_loop_ptr = 1;
1510#endif
239 1511
240static void 1512 loop_init (EV_A_ flags);
241sigcb (struct ev_io *iow, int revents) 1513
1514 if (ev_backend (EV_A))
1515 {
1516#ifndef _WIN32
1517 ev_signal_init (&childev, childcb, SIGCHLD);
1518 ev_set_priority (&childev, EV_MAXPRI);
1519 ev_signal_start (EV_A_ &childev);
1520 ev_unref (EV_A); /* child watcher should not keep loop alive */
1521#endif
1522 }
1523 else
1524 ev_default_loop_ptr = 0;
1525 }
1526
1527 return ev_default_loop_ptr;
1528}
1529
1530void
1531ev_default_destroy (void)
242{ 1532{
243 struct ev_signal *w; 1533#if EV_MULTIPLICITY
1534 struct ev_loop *loop = ev_default_loop_ptr;
1535#endif
1536
1537#ifndef _WIN32
1538 ev_ref (EV_A); /* child watcher */
1539 ev_signal_stop (EV_A_ &childev);
1540#endif
1541
1542 loop_destroy (EV_A);
1543}
1544
1545void
1546ev_default_fork (void)
1547{
1548#if EV_MULTIPLICITY
1549 struct ev_loop *loop = ev_default_loop_ptr;
1550#endif
1551
1552 if (backend)
1553 postfork = 1; /* must be in line with ev_loop_fork */
1554}
1555
1556/*****************************************************************************/
1557
1558void
1559ev_invoke (EV_P_ void *w, int revents)
1560{
1561 EV_CB_INVOKE ((W)w, revents);
1562}
1563
1564void inline_speed
1565call_pending (EV_P)
1566{
244 int sig; 1567 int pri;
245 1568
246 gotsig = 0; 1569 for (pri = NUMPRI; pri--; )
247 read (sigpipe [0], &revents, 1); 1570 while (pendingcnt [pri])
248
249 for (sig = signalmax; sig--; )
250 if (signals [sig].gotsig)
251 { 1571 {
252 signals [sig].gotsig = 0; 1572 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
253 1573
254 for (w = signals [sig].head; w; w = w->next) 1574 if (expect_true (p->w))
255 event ((struct ev_watcher *)w, EV_SIGNAL); 1575 {
1576 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1577
1578 p->w->pending = 0;
1579 EV_CB_INVOKE (p->w, p->events);
1580 }
256 } 1581 }
257} 1582}
258 1583
259static void 1584#if EV_IDLE_ENABLE
260siginit (void) 1585void inline_size
1586idle_reify (EV_P)
261{ 1587{
262 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC); 1588 if (expect_false (idleall))
263 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
264
265 /* rather than sort out wether we really need nb, set it */
266 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
267 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
268
269 evio_set (&sigev, sigpipe [0], EV_READ);
270 evio_start (&sigev);
271}
272
273/*****************************************************************************/
274
275static struct ev_idle **idles;
276static int idlemax, idlecnt;
277
278static struct ev_check **checks;
279static int checkmax, checkcnt;
280
281/*****************************************************************************/
282
283#if HAVE_EPOLL
284# include "ev_epoll.c"
285#endif
286#if HAVE_SELECT
287# include "ev_select.c"
288#endif
289
290int ev_init (int flags)
291{
292#if HAVE_MONOTONIC
293 {
294 struct timespec ts;
295 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
296 have_monotonic = 1;
297 }
298#endif
299
300 ev_now = ev_time ();
301 now = get_clock ();
302 diff = ev_now - now;
303
304 if (pipe (sigpipe))
305 return 0;
306
307 ev_method = EVMETHOD_NONE;
308#if HAVE_EPOLL
309 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
310#endif
311#if HAVE_SELECT
312 if (ev_method == EVMETHOD_NONE) select_init (flags);
313#endif
314
315 if (ev_method)
316 {
317 evw_init (&sigev, sigcb, 0);
318 siginit ();
319 } 1589 {
1590 int pri;
320 1591
321 return ev_method; 1592 for (pri = NUMPRI; pri--; )
322}
323
324/*****************************************************************************/
325
326void ev_prefork (void)
327{
328}
329
330void ev_postfork_parent (void)
331{
332}
333
334void ev_postfork_child (void)
335{
336#if HAVE_EPOLL
337 if (ev_method == EVMETHOD_EPOLL)
338 epoll_postfork_child ();
339#endif
340
341 evio_stop (&sigev);
342 close (sigpipe [0]);
343 close (sigpipe [1]);
344 pipe (sigpipe);
345 siginit ();
346}
347
348/*****************************************************************************/
349
350static void
351fd_reify (void)
352{
353 int i;
354
355 for (i = 0; i < fdchangecnt; ++i)
356 {
357 int fd = fdchanges [i];
358 ANFD *anfd = anfds + fd;
359 struct ev_io *w;
360
361 int wev = 0;
362
363 for (w = anfd->head; w; w = w->next)
364 wev |= w->events;
365
366 if (anfd->wev != wev)
367 { 1593 {
368 method_modify (fd, anfd->wev, wev); 1594 if (pendingcnt [pri])
369 anfd->wev = wev; 1595 break;
1596
1597 if (idlecnt [pri])
1598 {
1599 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1600 break;
1601 }
370 } 1602 }
371 } 1603 }
372
373 fdchangecnt = 0;
374} 1604}
1605#endif
375 1606
376static void 1607void inline_size
377call_pending () 1608timers_reify (EV_P)
378{ 1609{
379 int i; 1610 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
380
381 for (i = 0; i < pendingcnt; ++i)
382 {
383 ANPENDING *p = pendings + i;
384
385 if (p->w)
386 {
387 p->w->pending = 0;
388 p->w->cb (p->w, p->events);
389 }
390 } 1611 {
1612 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
391 1613
392 pendingcnt = 0; 1614 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
393}
394
395static void
396timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)
397{
398 while (timercnt && timers [0]->at <= now)
399 {
400 struct ev_timer *w = timers [0];
401 1615
402 /* first reschedule or stop timer */ 1616 /* first reschedule or stop timer */
403 if (w->repeat) 1617 if (w->repeat)
404 { 1618 {
405 if (w->is_abs) 1619 ev_at (w) += w->repeat;
406 w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat; 1620 if (ev_at (w) < mn_now)
407 else 1621 ev_at (w) = mn_now;
408 w->at = now + w->repeat;
409 1622
410 assert (w->at > now); 1623 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
411 1624
1625 ANHE_at_set (timers [HEAP0]);
412 downheap (timers, timercnt, 0); 1626 downheap (timers, timercnt, HEAP0);
413 } 1627 }
414 else 1628 else
1629 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1630
1631 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1632 }
1633}
1634
1635#if EV_PERIODIC_ENABLE
1636void inline_size
1637periodics_reify (EV_P)
1638{
1639 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1640 {
1641 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1642
1643 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1644
1645 /* first reschedule or stop timer */
1646 if (w->reschedule_cb)
415 { 1647 {
416 evtimer_stop (w); /* nonrepeating: stop timer */ 1648 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
417 --timercnt; /* maybe pass by reference instead? */ 1649
1650 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1651
1652 ANHE_at_set (periodics [HEAP0]);
1653 downheap (periodics, periodiccnt, HEAP0);
418 } 1654 }
1655 else if (w->interval)
1656 {
1657 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1658 /* if next trigger time is not sufficiently in the future, put it there */
1659 /* this might happen because of floating point inexactness */
1660 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1661 {
1662 ev_at (w) += w->interval;
419 1663
420 event ((struct ev_watcher *)w, EV_TIMEOUT); 1664 /* if interval is unreasonably low we might still have a time in the past */
421 } 1665 /* so correct this. this will make the periodic very inexact, but the user */
422} 1666 /* has effectively asked to get triggered more often than possible */
1667 if (ev_at (w) < ev_rt_now)
1668 ev_at (w) = ev_rt_now;
1669 }
423 1670
424static void 1671 ANHE_at_set (periodics [HEAP0]);
425time_update () 1672 downheap (periodics, periodiccnt, HEAP0);
1673 }
1674 else
1675 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1676
1677 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1678 }
1679}
1680
1681static void noinline
1682periodics_reschedule (EV_P)
426{ 1683{
427 int i; 1684 int i;
428 ev_now = ev_time ();
429 1685
430 if (have_monotonic) 1686 /* adjust periodics after time jump */
1687 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1688 {
1689 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1690
1691 if (w->reschedule_cb)
1692 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1693 else if (w->interval)
1694 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1695
1696 ANHE_at_set (periodics [i]);
431 { 1697 }
1698
1699 /* we don't use floyds algorithm, uphead is simpler and is more cache-efficient */
1700 /* also, this is easy and corretc for both 2-heaps and 4-heaps */
1701 for (i = 0; i < periodiccnt; ++i)
1702 upheap (periodics, i + HEAP0);
1703}
1704#endif
1705
1706void inline_speed
1707time_update (EV_P_ ev_tstamp max_block)
1708{
1709 int i;
1710
1711#if EV_USE_MONOTONIC
1712 if (expect_true (have_monotonic))
1713 {
432 ev_tstamp odiff = diff; 1714 ev_tstamp odiff = rtmn_diff;
433 1715
434 /* detecting time jumps is much more difficult */ 1716 mn_now = get_clock ();
435 for (i = 2; --i; ) /* loop a few times, before making important decisions */ 1717
1718 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1719 /* interpolate in the meantime */
1720 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
436 { 1721 {
437 now = get_clock (); 1722 ev_rt_now = rtmn_diff + mn_now;
1723 return;
1724 }
1725
1726 now_floor = mn_now;
1727 ev_rt_now = ev_time ();
1728
1729 /* loop a few times, before making important decisions.
1730 * on the choice of "4": one iteration isn't enough,
1731 * in case we get preempted during the calls to
1732 * ev_time and get_clock. a second call is almost guaranteed
1733 * to succeed in that case, though. and looping a few more times
1734 * doesn't hurt either as we only do this on time-jumps or
1735 * in the unlikely event of having been preempted here.
1736 */
1737 for (i = 4; --i; )
1738 {
438 diff = ev_now - now; 1739 rtmn_diff = ev_rt_now - mn_now;
439 1740
440 if (fabs (odiff - diff) < MIN_TIMEJUMP) 1741 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
441 return; /* all is well */ 1742 return; /* all is well */
442 1743
443 ev_now = ev_time (); 1744 ev_rt_now = ev_time ();
1745 mn_now = get_clock ();
1746 now_floor = mn_now;
444 } 1747 }
445 1748
446 /* time jump detected, reschedule atimers */ 1749# if EV_PERIODIC_ENABLE
447 for (i = 0; i < atimercnt; ++i) 1750 periodics_reschedule (EV_A);
1751# endif
1752 /* no timer adjustment, as the monotonic clock doesn't jump */
1753 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1754 }
1755 else
1756#endif
1757 {
1758 ev_rt_now = ev_time ();
1759
1760 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
448 { 1761 {
449 struct ev_timer *w = atimers [i]; 1762#if EV_PERIODIC_ENABLE
450 w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat; 1763 periodics_reschedule (EV_A);
1764#endif
1765 /* adjust timers. this is easy, as the offset is the same for all of them */
1766 for (i = 0; i < timercnt; ++i)
1767 {
1768 ANHE *he = timers + i + HEAP0;
1769 ANHE_w (*he)->at += ev_rt_now - mn_now;
1770 ANHE_at_set (*he);
1771 }
451 } 1772 }
452 }
453 else
454 {
455 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
456 /* time jump detected, adjust rtimers */
457 for (i = 0; i < rtimercnt; ++i)
458 rtimers [i]->at += ev_now - now;
459 1773
460 now = ev_now; 1774 mn_now = ev_rt_now;
461 }
462}
463
464int ev_loop_done;
465
466void ev_loop (int flags)
467{
468 double block;
469 ev_loop_done = flags & EVLOOP_ONESHOT;
470
471 if (checkcnt)
472 { 1775 }
473 queue_events (checks, checkcnt, EV_CHECK); 1776}
474 call_pending (); 1777
475 } 1778void
1779ev_ref (EV_P)
1780{
1781 ++activecnt;
1782}
1783
1784void
1785ev_unref (EV_P)
1786{
1787 --activecnt;
1788}
1789
1790static int loop_done;
1791
1792void
1793ev_loop (EV_P_ int flags)
1794{
1795 loop_done = EVUNLOOP_CANCEL;
1796
1797 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
476 1798
477 do 1799 do
478 { 1800 {
1801#ifndef _WIN32
1802 if (expect_false (curpid)) /* penalise the forking check even more */
1803 if (expect_false (getpid () != curpid))
1804 {
1805 curpid = getpid ();
1806 postfork = 1;
1807 }
1808#endif
1809
1810#if EV_FORK_ENABLE
1811 /* we might have forked, so queue fork handlers */
1812 if (expect_false (postfork))
1813 if (forkcnt)
1814 {
1815 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1816 call_pending (EV_A);
1817 }
1818#endif
1819
1820 /* queue prepare watchers (and execute them) */
1821 if (expect_false (preparecnt))
1822 {
1823 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1824 call_pending (EV_A);
1825 }
1826
1827 if (expect_false (!activecnt))
1828 break;
1829
1830 /* we might have forked, so reify kernel state if necessary */
1831 if (expect_false (postfork))
1832 loop_fork (EV_A);
1833
479 /* update fd-related kernel structures */ 1834 /* update fd-related kernel structures */
480 fd_reify (); 1835 fd_reify (EV_A);
481 1836
482 /* calculate blocking time */ 1837 /* calculate blocking time */
483 if (flags & EVLOOP_NONBLOCK || idlecnt) 1838 {
484 block = 0.; 1839 ev_tstamp waittime = 0.;
485 else 1840 ev_tstamp sleeptime = 0.;
1841
1842 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
486 { 1843 {
1844 /* update time to cancel out callback processing overhead */
1845 time_update (EV_A_ 1e100);
1846
487 block = MAX_BLOCKTIME; 1847 waittime = MAX_BLOCKTIME;
488 1848
489 if (rtimercnt) 1849 if (timercnt)
490 { 1850 {
491 ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge; 1851 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
492 if (block > to) block = to; 1852 if (waittime > to) waittime = to;
493 } 1853 }
494 1854
1855#if EV_PERIODIC_ENABLE
495 if (atimercnt) 1856 if (periodiccnt)
496 { 1857 {
497 ev_tstamp to = atimers [0]->at - ev_time () + method_fudge; 1858 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
498 if (block > to) block = to; 1859 if (waittime > to) waittime = to;
499 } 1860 }
1861#endif
500 1862
501 if (block < 0.) block = 0.; 1863 if (expect_false (waittime < timeout_blocktime))
1864 waittime = timeout_blocktime;
1865
1866 sleeptime = waittime - backend_fudge;
1867
1868 if (expect_true (sleeptime > io_blocktime))
1869 sleeptime = io_blocktime;
1870
1871 if (sleeptime)
1872 {
1873 ev_sleep (sleeptime);
1874 waittime -= sleeptime;
1875 }
502 } 1876 }
503 1877
504 method_poll (block); 1878 ++loop_count;
1879 backend_poll (EV_A_ waittime);
505 1880
506 /* update ev_now, do magic */ 1881 /* update ev_rt_now, do magic */
507 time_update (); 1882 time_update (EV_A_ waittime + sleeptime);
1883 }
508 1884
509 /* queue pending timers and reschedule them */ 1885 /* queue pending timers and reschedule them */
510 /* absolute timers first */ 1886 timers_reify (EV_A); /* relative timers called last */
511 timers_reify (atimers, atimercnt, ev_now); 1887#if EV_PERIODIC_ENABLE
512 /* relative timers second */ 1888 periodics_reify (EV_A); /* absolute timers called first */
513 timers_reify (rtimers, rtimercnt, now); 1889#endif
514 1890
1891#if EV_IDLE_ENABLE
515 /* queue idle watchers unless io or timers are pending */ 1892 /* queue idle watchers unless other events are pending */
516 if (!pendingcnt) 1893 idle_reify (EV_A);
517 queue_events (idles, idlecnt, EV_IDLE); 1894#endif
518 1895
519 /* queue check and possibly idle watchers */ 1896 /* queue check watchers, to be executed first */
1897 if (expect_false (checkcnt))
520 queue_events (checks, checkcnt, EV_CHECK); 1898 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
521 1899
522 call_pending (); 1900 call_pending (EV_A);
523 } 1901 }
524 while (!ev_loop_done); 1902 while (expect_true (
1903 activecnt
1904 && !loop_done
1905 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1906 ));
1907
1908 if (loop_done == EVUNLOOP_ONE)
1909 loop_done = EVUNLOOP_CANCEL;
1910}
1911
1912void
1913ev_unloop (EV_P_ int how)
1914{
1915 loop_done = how;
525} 1916}
526 1917
527/*****************************************************************************/ 1918/*****************************************************************************/
528 1919
529static void 1920void inline_size
530wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem) 1921wlist_add (WL *head, WL elem)
531{ 1922{
532 elem->next = *head; 1923 elem->next = *head;
533 *head = elem; 1924 *head = elem;
534} 1925}
535 1926
536static void 1927void inline_size
537wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem) 1928wlist_del (WL *head, WL elem)
538{ 1929{
539 while (*head) 1930 while (*head)
540 { 1931 {
541 if (*head == elem) 1932 if (*head == elem)
542 { 1933 {
… …
546 1937
547 head = &(*head)->next; 1938 head = &(*head)->next;
548 } 1939 }
549} 1940}
550 1941
551static void 1942void inline_speed
552ev_start (struct ev_watcher *w, int active) 1943clear_pending (EV_P_ W w)
553{ 1944{
1945 if (w->pending)
1946 {
1947 pendings [ABSPRI (w)][w->pending - 1].w = 0;
554 w->pending = 0; 1948 w->pending = 0;
1949 }
1950}
1951
1952int
1953ev_clear_pending (EV_P_ void *w)
1954{
1955 W w_ = (W)w;
1956 int pending = w_->pending;
1957
1958 if (expect_true (pending))
1959 {
1960 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1961 w_->pending = 0;
1962 p->w = 0;
1963 return p->events;
1964 }
1965 else
1966 return 0;
1967}
1968
1969void inline_size
1970pri_adjust (EV_P_ W w)
1971{
1972 int pri = w->priority;
1973 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1974 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1975 w->priority = pri;
1976}
1977
1978void inline_speed
1979ev_start (EV_P_ W w, int active)
1980{
1981 pri_adjust (EV_A_ w);
555 w->active = active; 1982 w->active = active;
1983 ev_ref (EV_A);
556} 1984}
557 1985
558static void 1986void inline_size
559ev_stop (struct ev_watcher *w) 1987ev_stop (EV_P_ W w)
560{ 1988{
561 if (w->pending) 1989 ev_unref (EV_A);
562 pendings [w->pending - 1].w = 0;
563
564 w->active = 0; 1990 w->active = 0;
565 /* nop */
566} 1991}
567 1992
568/*****************************************************************************/ 1993/*****************************************************************************/
569 1994
570void 1995void noinline
571evio_start (struct ev_io *w) 1996ev_io_start (EV_P_ ev_io *w)
1997{
1998 int fd = w->fd;
1999
2000 if (expect_false (ev_is_active (w)))
2001 return;
2002
2003 assert (("ev_io_start called with negative fd", fd >= 0));
2004
2005 ev_start (EV_A_ (W)w, 1);
2006 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
2007 wlist_add (&anfds[fd].head, (WL)w);
2008
2009 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
2010 w->events &= ~EV_IOFDSET;
2011}
2012
2013void noinline
2014ev_io_stop (EV_P_ ev_io *w)
2015{
2016 clear_pending (EV_A_ (W)w);
2017 if (expect_false (!ev_is_active (w)))
2018 return;
2019
2020 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2021
2022 wlist_del (&anfds[w->fd].head, (WL)w);
2023 ev_stop (EV_A_ (W)w);
2024
2025 fd_change (EV_A_ w->fd, 1);
2026}
2027
2028void noinline
2029ev_timer_start (EV_P_ ev_timer *w)
2030{
2031 if (expect_false (ev_is_active (w)))
2032 return;
2033
2034 ev_at (w) += mn_now;
2035
2036 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2037
2038 ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
2039 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2040 ANHE_w (timers [ev_active (w)]) = (WT)w;
2041 ANHE_at_set (timers [ev_active (w)]);
2042 upheap (timers, ev_active (w));
2043
2044 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2045}
2046
2047void noinline
2048ev_timer_stop (EV_P_ ev_timer *w)
2049{
2050 clear_pending (EV_A_ (W)w);
2051 if (expect_false (!ev_is_active (w)))
2052 return;
2053
2054 {
2055 int active = ev_active (w);
2056
2057 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2058
2059 if (expect_true (active < timercnt + HEAP0 - 1))
2060 {
2061 timers [active] = timers [timercnt + HEAP0 - 1];
2062 adjustheap (timers, timercnt, active);
2063 }
2064
2065 --timercnt;
2066 }
2067
2068 ev_at (w) -= mn_now;
2069
2070 ev_stop (EV_A_ (W)w);
2071}
2072
2073void noinline
2074ev_timer_again (EV_P_ ev_timer *w)
572{ 2075{
573 if (ev_is_active (w)) 2076 if (ev_is_active (w))
2077 {
2078 if (w->repeat)
2079 {
2080 ev_at (w) = mn_now + w->repeat;
2081 ANHE_at_set (timers [ev_active (w)]);
2082 adjustheap (timers, timercnt, ev_active (w));
2083 }
2084 else
2085 ev_timer_stop (EV_A_ w);
2086 }
2087 else if (w->repeat)
2088 {
2089 ev_at (w) = w->repeat;
2090 ev_timer_start (EV_A_ w);
2091 }
2092}
2093
2094#if EV_PERIODIC_ENABLE
2095void noinline
2096ev_periodic_start (EV_P_ ev_periodic *w)
2097{
2098 if (expect_false (ev_is_active (w)))
574 return; 2099 return;
575 2100
576 int fd = w->fd; 2101 if (w->reschedule_cb)
2102 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2103 else if (w->interval)
2104 {
2105 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
2106 /* this formula differs from the one in periodic_reify because we do not always round up */
2107 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2108 }
2109 else
2110 ev_at (w) = w->offset;
577 2111
578 ev_start ((struct ev_watcher *)w, 1); 2112 ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
579 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2113 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
580 wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w); 2114 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2115 ANHE_at_set (periodics [ev_active (w)]);
2116 upheap (periodics, ev_active (w));
581 2117
582 ++fdchangecnt; 2118 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
583 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
584 fdchanges [fdchangecnt - 1] = fd;
585} 2119}
586 2120
587void 2121void noinline
588evio_stop (struct ev_io *w) 2122ev_periodic_stop (EV_P_ ev_periodic *w)
589{ 2123{
2124 clear_pending (EV_A_ (W)w);
590 if (!ev_is_active (w)) 2125 if (expect_false (!ev_is_active (w)))
591 return; 2126 return;
592 2127
593 wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w); 2128 {
594 ev_stop ((struct ev_watcher *)w); 2129 int active = ev_active (w);
595 2130
596 ++fdchangecnt; 2131 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
597 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
598 fdchanges [fdchangecnt - 1] = w->fd;
599}
600 2132
601void 2133 if (expect_true (active < periodiccnt + HEAP0 - 1))
602evtimer_start (struct ev_timer *w) 2134 {
2135 periodics [active] = periodics [periodiccnt + HEAP0 - 1];
2136 adjustheap (periodics, periodiccnt, active);
2137 }
2138
2139 --periodiccnt;
2140 }
2141
2142 ev_stop (EV_A_ (W)w);
2143}
2144
2145void noinline
2146ev_periodic_again (EV_P_ ev_periodic *w)
603{ 2147{
2148 /* TODO: use adjustheap and recalculation */
2149 ev_periodic_stop (EV_A_ w);
2150 ev_periodic_start (EV_A_ w);
2151}
2152#endif
2153
2154#ifndef SA_RESTART
2155# define SA_RESTART 0
2156#endif
2157
2158void noinline
2159ev_signal_start (EV_P_ ev_signal *w)
2160{
2161#if EV_MULTIPLICITY
2162 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2163#endif
604 if (ev_is_active (w)) 2164 if (expect_false (ev_is_active (w)))
605 return; 2165 return;
606 2166
607 if (w->is_abs) 2167 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2168
2169 evpipe_init (EV_A);
2170
608 { 2171 {
609 /* this formula differs from the one in timer_reify becuse we do not round up */ 2172#ifndef _WIN32
610 if (w->repeat) 2173 sigset_t full, prev;
611 w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat; 2174 sigfillset (&full);
2175 sigprocmask (SIG_SETMASK, &full, &prev);
2176#endif
612 2177
613 ev_start ((struct ev_watcher *)w, ++atimercnt); 2178 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
614 array_needsize (atimers, atimermax, atimercnt, ); 2179
615 atimers [atimercnt - 1] = w; 2180#ifndef _WIN32
616 upheap (atimers, atimercnt - 1); 2181 sigprocmask (SIG_SETMASK, &prev, 0);
2182#endif
2183 }
2184
2185 ev_start (EV_A_ (W)w, 1);
2186 wlist_add (&signals [w->signum - 1].head, (WL)w);
2187
2188 if (!((WL)w)->next)
617 } 2189 {
618 else 2190#if _WIN32
2191 signal (w->signum, ev_sighandler);
2192#else
2193 struct sigaction sa;
2194 sa.sa_handler = ev_sighandler;
2195 sigfillset (&sa.sa_mask);
2196 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2197 sigaction (w->signum, &sa, 0);
2198#endif
619 { 2199 }
620 w->at += now;
621
622 ev_start ((struct ev_watcher *)w, ++rtimercnt);
623 array_needsize (rtimers, rtimermax, rtimercnt, );
624 rtimers [rtimercnt - 1] = w;
625 upheap (rtimers, rtimercnt - 1);
626 }
627
628} 2200}
629 2201
630void 2202void noinline
631evtimer_stop (struct ev_timer *w) 2203ev_signal_stop (EV_P_ ev_signal *w)
632{ 2204{
2205 clear_pending (EV_A_ (W)w);
633 if (!ev_is_active (w)) 2206 if (expect_false (!ev_is_active (w)))
634 return; 2207 return;
635 2208
636 if (w->is_abs) 2209 wlist_del (&signals [w->signum - 1].head, (WL)w);
637 { 2210 ev_stop (EV_A_ (W)w);
638 if (w->active < atimercnt--)
639 {
640 atimers [w->active - 1] = atimers [atimercnt];
641 downheap (atimers, atimercnt, w->active - 1);
642 }
643 }
644 else
645 {
646 if (w->active < rtimercnt--)
647 {
648 rtimers [w->active - 1] = rtimers [rtimercnt];
649 downheap (rtimers, rtimercnt, w->active - 1);
650 }
651 }
652
653 ev_stop ((struct ev_watcher *)w);
654}
655
656void
657evsignal_start (struct ev_signal *w)
658{
659 if (ev_is_active (w))
660 return;
661
662 ev_start ((struct ev_watcher *)w, 1);
663 array_needsize (signals, signalmax, w->signum, signals_init);
664 wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);
665
666 if (!w->next)
667 {
668 struct sigaction sa;
669 sa.sa_handler = sighandler;
670 sigfillset (&sa.sa_mask);
671 sa.sa_flags = 0;
672 sigaction (w->signum, &sa, 0);
673 }
674}
675
676void
677evsignal_stop (struct ev_signal *w)
678{
679 if (!ev_is_active (w))
680 return;
681
682 wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);
683 ev_stop ((struct ev_watcher *)w);
684 2211
685 if (!signals [w->signum - 1].head) 2212 if (!signals [w->signum - 1].head)
686 signal (w->signum, SIG_DFL); 2213 signal (w->signum, SIG_DFL);
687} 2214}
688 2215
689void evidle_start (struct ev_idle *w) 2216void
2217ev_child_start (EV_P_ ev_child *w)
690{ 2218{
2219#if EV_MULTIPLICITY
2220 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2221#endif
691 if (ev_is_active (w)) 2222 if (expect_false (ev_is_active (w)))
692 return; 2223 return;
693 2224
694 ev_start ((struct ev_watcher *)w, ++idlecnt); 2225 ev_start (EV_A_ (W)w, 1);
695 array_needsize (idles, idlemax, idlecnt, ); 2226 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
696 idles [idlecnt - 1] = w;
697} 2227}
698 2228
699void evidle_stop (struct ev_idle *w) 2229void
2230ev_child_stop (EV_P_ ev_child *w)
700{ 2231{
701 idles [w->active - 1] = idles [--idlecnt]; 2232 clear_pending (EV_A_ (W)w);
702 ev_stop ((struct ev_watcher *)w); 2233 if (expect_false (!ev_is_active (w)))
703}
704
705void evcheck_start (struct ev_check *w)
706{
707 if (ev_is_active (w))
708 return; 2234 return;
709 2235
710 ev_start ((struct ev_watcher *)w, ++checkcnt); 2236 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2237 ev_stop (EV_A_ (W)w);
2238}
2239
2240#if EV_STAT_ENABLE
2241
2242# ifdef _WIN32
2243# undef lstat
2244# define lstat(a,b) _stati64 (a,b)
2245# endif
2246
2247#define DEF_STAT_INTERVAL 5.0074891
2248#define MIN_STAT_INTERVAL 0.1074891
2249
2250static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2251
2252#if EV_USE_INOTIFY
2253# define EV_INOTIFY_BUFSIZE 8192
2254
2255static void noinline
2256infy_add (EV_P_ ev_stat *w)
2257{
2258 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);
2259
2260 if (w->wd < 0)
2261 {
2262 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2263
2264 /* monitor some parent directory for speedup hints */
2265 /* note that exceeding the hardcoded limit is not a correctness issue, */
2266 /* but an efficiency issue only */
2267 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2268 {
2269 char path [4096];
2270 strcpy (path, w->path);
2271
2272 do
2273 {
2274 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2275 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2276
2277 char *pend = strrchr (path, '/');
2278
2279 if (!pend)
2280 break; /* whoops, no '/', complain to your admin */
2281
2282 *pend = 0;
2283 w->wd = inotify_add_watch (fs_fd, path, mask);
2284 }
2285 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2286 }
2287 }
2288 else
2289 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2290
2291 if (w->wd >= 0)
2292 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2293}
2294
2295static void noinline
2296infy_del (EV_P_ ev_stat *w)
2297{
2298 int slot;
2299 int wd = w->wd;
2300
2301 if (wd < 0)
2302 return;
2303
2304 w->wd = -2;
2305 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2306 wlist_del (&fs_hash [slot].head, (WL)w);
2307
2308 /* remove this watcher, if others are watching it, they will rearm */
2309 inotify_rm_watch (fs_fd, wd);
2310}
2311
2312static void noinline
2313infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2314{
2315 if (slot < 0)
2316 /* overflow, need to check for all hahs slots */
2317 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2318 infy_wd (EV_A_ slot, wd, ev);
2319 else
2320 {
2321 WL w_;
2322
2323 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2324 {
2325 ev_stat *w = (ev_stat *)w_;
2326 w_ = w_->next; /* lets us remove this watcher and all before it */
2327
2328 if (w->wd == wd || wd == -1)
2329 {
2330 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2331 {
2332 w->wd = -1;
2333 infy_add (EV_A_ w); /* re-add, no matter what */
2334 }
2335
2336 stat_timer_cb (EV_A_ &w->timer, 0);
2337 }
2338 }
2339 }
2340}
2341
2342static void
2343infy_cb (EV_P_ ev_io *w, int revents)
2344{
2345 char buf [EV_INOTIFY_BUFSIZE];
2346 struct inotify_event *ev = (struct inotify_event *)buf;
2347 int ofs;
2348 int len = read (fs_fd, buf, sizeof (buf));
2349
2350 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2351 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2352}
2353
2354void inline_size
2355infy_init (EV_P)
2356{
2357 if (fs_fd != -2)
2358 return;
2359
2360 fs_fd = inotify_init ();
2361
2362 if (fs_fd >= 0)
2363 {
2364 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2365 ev_set_priority (&fs_w, EV_MAXPRI);
2366 ev_io_start (EV_A_ &fs_w);
2367 }
2368}
2369
2370void inline_size
2371infy_fork (EV_P)
2372{
2373 int slot;
2374
2375 if (fs_fd < 0)
2376 return;
2377
2378 close (fs_fd);
2379 fs_fd = inotify_init ();
2380
2381 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2382 {
2383 WL w_ = fs_hash [slot].head;
2384 fs_hash [slot].head = 0;
2385
2386 while (w_)
2387 {
2388 ev_stat *w = (ev_stat *)w_;
2389 w_ = w_->next; /* lets us add this watcher */
2390
2391 w->wd = -1;
2392
2393 if (fs_fd >= 0)
2394 infy_add (EV_A_ w); /* re-add, no matter what */
2395 else
2396 ev_timer_start (EV_A_ &w->timer);
2397 }
2398
2399 }
2400}
2401
2402#endif
2403
2404void
2405ev_stat_stat (EV_P_ ev_stat *w)
2406{
2407 if (lstat (w->path, &w->attr) < 0)
2408 w->attr.st_nlink = 0;
2409 else if (!w->attr.st_nlink)
2410 w->attr.st_nlink = 1;
2411}
2412
2413static void noinline
2414stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2415{
2416 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2417
2418 /* we copy this here each the time so that */
2419 /* prev has the old value when the callback gets invoked */
2420 w->prev = w->attr;
2421 ev_stat_stat (EV_A_ w);
2422
2423 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2424 if (
2425 w->prev.st_dev != w->attr.st_dev
2426 || w->prev.st_ino != w->attr.st_ino
2427 || w->prev.st_mode != w->attr.st_mode
2428 || w->prev.st_nlink != w->attr.st_nlink
2429 || w->prev.st_uid != w->attr.st_uid
2430 || w->prev.st_gid != w->attr.st_gid
2431 || w->prev.st_rdev != w->attr.st_rdev
2432 || w->prev.st_size != w->attr.st_size
2433 || w->prev.st_atime != w->attr.st_atime
2434 || w->prev.st_mtime != w->attr.st_mtime
2435 || w->prev.st_ctime != w->attr.st_ctime
2436 ) {
2437 #if EV_USE_INOTIFY
2438 infy_del (EV_A_ w);
2439 infy_add (EV_A_ w);
2440 ev_stat_stat (EV_A_ w); /* avoid race... */
2441 #endif
2442
2443 ev_feed_event (EV_A_ w, EV_STAT);
2444 }
2445}
2446
2447void
2448ev_stat_start (EV_P_ ev_stat *w)
2449{
2450 if (expect_false (ev_is_active (w)))
2451 return;
2452
2453 /* since we use memcmp, we need to clear any padding data etc. */
2454 memset (&w->prev, 0, sizeof (ev_statdata));
2455 memset (&w->attr, 0, sizeof (ev_statdata));
2456
2457 ev_stat_stat (EV_A_ w);
2458
2459 if (w->interval < MIN_STAT_INTERVAL)
2460 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2461
2462 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2463 ev_set_priority (&w->timer, ev_priority (w));
2464
2465#if EV_USE_INOTIFY
2466 infy_init (EV_A);
2467
2468 if (fs_fd >= 0)
2469 infy_add (EV_A_ w);
2470 else
2471#endif
2472 ev_timer_start (EV_A_ &w->timer);
2473
2474 ev_start (EV_A_ (W)w, 1);
2475}
2476
2477void
2478ev_stat_stop (EV_P_ ev_stat *w)
2479{
2480 clear_pending (EV_A_ (W)w);
2481 if (expect_false (!ev_is_active (w)))
2482 return;
2483
2484#if EV_USE_INOTIFY
2485 infy_del (EV_A_ w);
2486#endif
2487 ev_timer_stop (EV_A_ &w->timer);
2488
2489 ev_stop (EV_A_ (W)w);
2490}
2491#endif
2492
2493#if EV_IDLE_ENABLE
2494void
2495ev_idle_start (EV_P_ ev_idle *w)
2496{
2497 if (expect_false (ev_is_active (w)))
2498 return;
2499
2500 pri_adjust (EV_A_ (W)w);
2501
2502 {
2503 int active = ++idlecnt [ABSPRI (w)];
2504
2505 ++idleall;
2506 ev_start (EV_A_ (W)w, active);
2507
2508 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2509 idles [ABSPRI (w)][active - 1] = w;
2510 }
2511}
2512
2513void
2514ev_idle_stop (EV_P_ ev_idle *w)
2515{
2516 clear_pending (EV_A_ (W)w);
2517 if (expect_false (!ev_is_active (w)))
2518 return;
2519
2520 {
2521 int active = ev_active (w);
2522
2523 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2524 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2525
2526 ev_stop (EV_A_ (W)w);
2527 --idleall;
2528 }
2529}
2530#endif
2531
2532void
2533ev_prepare_start (EV_P_ ev_prepare *w)
2534{
2535 if (expect_false (ev_is_active (w)))
2536 return;
2537
2538 ev_start (EV_A_ (W)w, ++preparecnt);
2539 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2540 prepares [preparecnt - 1] = w;
2541}
2542
2543void
2544ev_prepare_stop (EV_P_ ev_prepare *w)
2545{
2546 clear_pending (EV_A_ (W)w);
2547 if (expect_false (!ev_is_active (w)))
2548 return;
2549
2550 {
2551 int active = ev_active (w);
2552
2553 prepares [active - 1] = prepares [--preparecnt];
2554 ev_active (prepares [active - 1]) = active;
2555 }
2556
2557 ev_stop (EV_A_ (W)w);
2558}
2559
2560void
2561ev_check_start (EV_P_ ev_check *w)
2562{
2563 if (expect_false (ev_is_active (w)))
2564 return;
2565
2566 ev_start (EV_A_ (W)w, ++checkcnt);
711 array_needsize (checks, checkmax, checkcnt, ); 2567 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
712 checks [checkcnt - 1] = w; 2568 checks [checkcnt - 1] = w;
713} 2569}
714 2570
2571void
715void evcheck_stop (struct ev_check *w) 2572ev_check_stop (EV_P_ ev_check *w)
716{ 2573{
2574 clear_pending (EV_A_ (W)w);
2575 if (expect_false (!ev_is_active (w)))
2576 return;
2577
2578 {
2579 int active = ev_active (w);
2580
717 checks [w->active - 1] = checks [--checkcnt]; 2581 checks [active - 1] = checks [--checkcnt];
718 ev_stop ((struct ev_watcher *)w); 2582 ev_active (checks [active - 1]) = active;
2583 }
2584
2585 ev_stop (EV_A_ (W)w);
719} 2586}
2587
2588#if EV_EMBED_ENABLE
2589void noinline
2590ev_embed_sweep (EV_P_ ev_embed *w)
2591{
2592 ev_loop (w->other, EVLOOP_NONBLOCK);
2593}
2594
2595static void
2596embed_io_cb (EV_P_ ev_io *io, int revents)
2597{
2598 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2599
2600 if (ev_cb (w))
2601 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2602 else
2603 ev_loop (w->other, EVLOOP_NONBLOCK);
2604}
2605
2606static void
2607embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2608{
2609 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2610
2611 {
2612 struct ev_loop *loop = w->other;
2613
2614 while (fdchangecnt)
2615 {
2616 fd_reify (EV_A);
2617 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2618 }
2619 }
2620}
2621
2622#if 0
2623static void
2624embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2625{
2626 ev_idle_stop (EV_A_ idle);
2627}
2628#endif
2629
2630void
2631ev_embed_start (EV_P_ ev_embed *w)
2632{
2633 if (expect_false (ev_is_active (w)))
2634 return;
2635
2636 {
2637 struct ev_loop *loop = w->other;
2638 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2639 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2640 }
2641
2642 ev_set_priority (&w->io, ev_priority (w));
2643 ev_io_start (EV_A_ &w->io);
2644
2645 ev_prepare_init (&w->prepare, embed_prepare_cb);
2646 ev_set_priority (&w->prepare, EV_MINPRI);
2647 ev_prepare_start (EV_A_ &w->prepare);
2648
2649 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2650
2651 ev_start (EV_A_ (W)w, 1);
2652}
2653
2654void
2655ev_embed_stop (EV_P_ ev_embed *w)
2656{
2657 clear_pending (EV_A_ (W)w);
2658 if (expect_false (!ev_is_active (w)))
2659 return;
2660
2661 ev_io_stop (EV_A_ &w->io);
2662 ev_prepare_stop (EV_A_ &w->prepare);
2663
2664 ev_stop (EV_A_ (W)w);
2665}
2666#endif
2667
2668#if EV_FORK_ENABLE
2669void
2670ev_fork_start (EV_P_ ev_fork *w)
2671{
2672 if (expect_false (ev_is_active (w)))
2673 return;
2674
2675 ev_start (EV_A_ (W)w, ++forkcnt);
2676 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2677 forks [forkcnt - 1] = w;
2678}
2679
2680void
2681ev_fork_stop (EV_P_ ev_fork *w)
2682{
2683 clear_pending (EV_A_ (W)w);
2684 if (expect_false (!ev_is_active (w)))
2685 return;
2686
2687 {
2688 int active = ev_active (w);
2689
2690 forks [active - 1] = forks [--forkcnt];
2691 ev_active (forks [active - 1]) = active;
2692 }
2693
2694 ev_stop (EV_A_ (W)w);
2695}
2696#endif
2697
2698#if EV_ASYNC_ENABLE
2699void
2700ev_async_start (EV_P_ ev_async *w)
2701{
2702 if (expect_false (ev_is_active (w)))
2703 return;
2704
2705 evpipe_init (EV_A);
2706
2707 ev_start (EV_A_ (W)w, ++asynccnt);
2708 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2709 asyncs [asynccnt - 1] = w;
2710}
2711
2712void
2713ev_async_stop (EV_P_ ev_async *w)
2714{
2715 clear_pending (EV_A_ (W)w);
2716 if (expect_false (!ev_is_active (w)))
2717 return;
2718
2719 {
2720 int active = ev_active (w);
2721
2722 asyncs [active - 1] = asyncs [--asynccnt];
2723 ev_active (asyncs [active - 1]) = active;
2724 }
2725
2726 ev_stop (EV_A_ (W)w);
2727}
2728
2729void
2730ev_async_send (EV_P_ ev_async *w)
2731{
2732 w->sent = 1;
2733 evpipe_write (EV_A_ &gotasync);
2734}
2735#endif
720 2736
721/*****************************************************************************/ 2737/*****************************************************************************/
722#if 1 2738
2739struct ev_once
2740{
2741 ev_io io;
2742 ev_timer to;
2743 void (*cb)(int revents, void *arg);
2744 void *arg;
2745};
723 2746
724static void 2747static void
725sin_cb (struct ev_io *w, int revents) 2748once_cb (EV_P_ struct ev_once *once, int revents)
726{ 2749{
727 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 2750 void (*cb)(int revents, void *arg) = once->cb;
2751 void *arg = once->arg;
2752
2753 ev_io_stop (EV_A_ &once->io);
2754 ev_timer_stop (EV_A_ &once->to);
2755 ev_free (once);
2756
2757 cb (revents, arg);
728} 2758}
729 2759
730static void 2760static void
731ocb (struct ev_timer *w, int revents) 2761once_cb_io (EV_P_ ev_io *w, int revents)
732{ 2762{
733 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 2763 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
734 evtimer_stop (w);
735 evtimer_start (w);
736} 2764}
737 2765
738static void 2766static void
739scb (struct ev_signal *w, int revents) 2767once_cb_to (EV_P_ ev_timer *w, int revents)
740{ 2768{
741 fprintf (stderr, "signal %x,%d\n", revents, w->signum); 2769 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
742} 2770}
743 2771
744static void 2772void
745gcb (struct ev_signal *w, int revents) 2773ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
746{ 2774{
747 fprintf (stderr, "generic %x\n", revents); 2775 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
748}
749 2776
750int main (void) 2777 if (expect_false (!once))
751{
752 struct ev_io sin;
753
754 ev_init (0);
755
756 evw_init (&sin, sin_cb, 55);
757 evio_set (&sin, 0, EV_READ);
758 evio_start (&sin);
759
760 struct ev_timer t[10000];
761
762#if 0
763 int i;
764 for (i = 0; i < 10000; ++i)
765 {
766 struct ev_timer *w = t + i;
767 evw_init (w, ocb, i);
768 evtimer_set_abs (w, drand48 (), 0.99775533);
769 evtimer_start (w);
770 if (drand48 () < 0.5)
771 evtimer_stop (w);
772 } 2778 {
773#endif 2779 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
774
775 struct ev_timer t1;
776 evw_init (&t1, ocb, 0);
777 evtimer_set_abs (&t1, 5, 10);
778 evtimer_start (&t1);
779
780 struct ev_signal sig;
781 evw_init (&sig, scb, 65535);
782 evsignal_set (&sig, SIGQUIT);
783 evsignal_start (&sig);
784
785 struct ev_check cw;
786 evw_init (&cw, gcb, 0);
787 evcheck_start (&cw);
788
789 struct ev_idle iw;
790 evw_init (&iw, gcb, 0);
791 evidle_start (&iw);
792
793 ev_loop (0);
794
795 return 0; 2780 return;
796} 2781 }
797 2782
798#endif 2783 once->cb = cb;
2784 once->arg = arg;
799 2785
2786 ev_init (&once->io, once_cb_io);
2787 if (fd >= 0)
2788 {
2789 ev_io_set (&once->io, fd, events);
2790 ev_io_start (EV_A_ &once->io);
2791 }
800 2792
2793 ev_init (&once->to, once_cb_to);
2794 if (timeout >= 0.)
2795 {
2796 ev_timer_set (&once->to, timeout, 0.);
2797 ev_timer_start (EV_A_ &once->to);
2798 }
2799}
801 2800
2801#if EV_MULTIPLICITY
2802 #include "ev_wrap.h"
2803#endif
802 2804
2805#ifdef __cplusplus
2806}
2807#endif
2808

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