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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 1.288 by root, Sat Apr 25 14:12:48 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>
3#include <unistd.h>
4#include <fcntl.h> 148#include <fcntl.h>
5#include <signal.h> 149#include <stddef.h>
6 150
7#include <stdio.h> 151#include <stdio.h>
8 152
9#include <assert.h> 153#include <assert.h>
10#include <errno.h> 154#include <errno.h>
11#include <sys/time.h> 155#include <sys/types.h>
12#include <time.h> 156#include <time.h>
13 157
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
14#ifdef CLOCK_MONOTONIC 289#ifndef CLOCK_MONOTONIC
290# undef EV_USE_MONOTONIC
15# 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>
16#endif 307# endif
308#endif
17 309
18#define HAVE_REALTIME 1 310#if EV_USE_INOTIFY
19#define HAVE_EPOLL 1 311# include <sys/utsname.h>
20#define HAVE_SELECT 1 312# 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
320
321#if EV_SELECT_IS_WINSOCKET
322# include <winsock.h>
323#endif
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 */
21 363
22#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 364#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
23#define MAX_BLOCKTIME 60. 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 */
24 367
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
483/* file descriptor info structure */
484typedef struct
485{
486 WL head;
487 unsigned char events; /* the events watched for */
488 unsigned char reify; /* flag set when this ANFD needs reification */
489 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
490 unsigned char unused;
491#if EV_USE_EPOLL
492 unsigned int egen; /* generation counter to counter epoll bugs */
493#endif
494#if EV_SELECT_IS_WINSOCKET
495 SOCKET handle;
496#endif
497} ANFD;
498
499/* stores the pending event set for a given watcher */
500typedef struct
501{
502 W w;
503 int events; /* the pending event set for the given watcher */
504} ANPENDING;
505
506#if EV_USE_INOTIFY
507/* hash table entry per inotify-id */
508typedef struct
509{
510 WL head;
511} ANFS;
512#endif
513
514/* Heap Entry */
515#if EV_HEAP_CACHE_AT
516 /* a heap element */
517 typedef struct {
518 ev_tstamp at;
519 WT w;
520 } ANHE;
521
522 #define ANHE_w(he) (he).w /* access watcher, read-write */
523 #define ANHE_at(he) (he).at /* access cached at, read-only */
524 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
525#else
526 /* a heap element */
527 typedef WT ANHE;
528
529 #define ANHE_w(he) (he)
530 #define ANHE_at(he) (he)->at
531 #define ANHE_at_cache(he)
532#endif
533
534#if EV_MULTIPLICITY
535
536 struct ev_loop
537 {
538 ev_tstamp ev_rt_now;
539 #define ev_rt_now ((loop)->ev_rt_now)
540 #define VAR(name,decl) decl;
541 #include "ev_vars.h"
542 #undef VAR
543 };
25#include "ev.h" 544 #include "ev_wrap.h"
26 545
27struct ev_watcher { 546 static struct ev_loop default_loop_struct;
28 EV_WATCHER (ev_watcher); 547 struct ev_loop *ev_default_loop_ptr;
29};
30 548
31struct ev_watcher_list { 549#else
32 EV_WATCHER_LIST (ev_watcher_list);
33};
34 550
35static ev_tstamp now, diff; /* monotonic clock */
36ev_tstamp ev_now; 551 ev_tstamp ev_rt_now;
37int ev_method; 552 #define VAR(name,decl) static decl;
553 #include "ev_vars.h"
554 #undef VAR
38 555
39static int have_monotonic; /* runtime */ 556 static int ev_default_loop_ptr;
40 557
41static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 558#endif
42static void (*method_modify)(int fd, int oev, int nev);
43static void (*method_poll)(ev_tstamp timeout);
44 559
45/*****************************************************************************/ 560/*****************************************************************************/
46 561
47ev_tstamp 562ev_tstamp
48ev_time (void) 563ev_time (void)
49{ 564{
50#if HAVE_REALTIME 565#if EV_USE_REALTIME
566 if (expect_true (have_realtime))
567 {
51 struct timespec ts; 568 struct timespec ts;
52 clock_gettime (CLOCK_REALTIME, &ts); 569 clock_gettime (CLOCK_REALTIME, &ts);
53 return ts.tv_sec + ts.tv_nsec * 1e-9; 570 return ts.tv_sec + ts.tv_nsec * 1e-9;
54#else 571 }
572#endif
573
55 struct timeval tv; 574 struct timeval tv;
56 gettimeofday (&tv, 0); 575 gettimeofday (&tv, 0);
57 return tv.tv_sec + tv.tv_usec * 1e-6; 576 return tv.tv_sec + tv.tv_usec * 1e-6;
58#endif
59} 577}
60 578
61static ev_tstamp 579inline_size ev_tstamp
62get_clock (void) 580get_clock (void)
63{ 581{
64#if HAVE_MONOTONIC 582#if EV_USE_MONOTONIC
65 if (have_monotonic) 583 if (expect_true (have_monotonic))
66 { 584 {
67 struct timespec ts; 585 struct timespec ts;
68 clock_gettime (CLOCK_MONOTONIC, &ts); 586 clock_gettime (CLOCK_MONOTONIC, &ts);
69 return ts.tv_sec + ts.tv_nsec * 1e-9; 587 return ts.tv_sec + ts.tv_nsec * 1e-9;
70 } 588 }
71#endif 589#endif
72 590
73 return ev_time (); 591 return ev_time ();
74} 592}
75 593
76#define array_needsize(base,cur,cnt,init) \ 594#if EV_MULTIPLICITY
77 if ((cnt) > cur) \ 595ev_tstamp
78 { \ 596ev_now (EV_P)
79 int newcnt = cur ? cur << 1 : 16; \ 597{
80 fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\ 598 return ev_rt_now;
81 base = realloc (base, sizeof (*base) * (newcnt)); \ 599}
82 init (base + cur, newcnt - cur); \ 600#endif
83 cur = newcnt; \ 601
602void
603ev_sleep (ev_tstamp delay)
604{
605 if (delay > 0.)
84 } 606 {
607#if EV_USE_NANOSLEEP
608 struct timespec ts;
609
610 ts.tv_sec = (time_t)delay;
611 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
612
613 nanosleep (&ts, 0);
614#elif defined(_WIN32)
615 Sleep ((unsigned long)(delay * 1e3));
616#else
617 struct timeval tv;
618
619 tv.tv_sec = (time_t)delay;
620 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
621
622 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
623 /* somehting nto guaranteed by newer posix versions, but guaranteed */
624 /* by older ones */
625 select (0, 0, 0, 0, &tv);
626#endif
627 }
628}
85 629
86/*****************************************************************************/ 630/*****************************************************************************/
87 631
632#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
633
634/* find a suitable new size for the given array, */
635/* hopefully by rounding to a ncie-to-malloc size */
636inline_size int
637array_nextsize (int elem, int cur, int cnt)
638{
639 int ncur = cur + 1;
640
641 do
642 ncur <<= 1;
643 while (cnt > ncur);
644
645 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
646 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
647 {
648 ncur *= elem;
649 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
650 ncur = ncur - sizeof (void *) * 4;
651 ncur /= elem;
652 }
653
654 return ncur;
655}
656
657static noinline void *
658array_realloc (int elem, void *base, int *cur, int cnt)
659{
660 *cur = array_nextsize (elem, *cur, cnt);
661 return ev_realloc (base, elem * *cur);
662}
663
664#define array_init_zero(base,count) \
665 memset ((void *)(base), 0, sizeof (*(base)) * (count))
666
667#define array_needsize(type,base,cur,cnt,init) \
668 if (expect_false ((cnt) > (cur))) \
669 { \
670 int ocur_ = (cur); \
671 (base) = (type *)array_realloc \
672 (sizeof (type), (base), &(cur), (cnt)); \
673 init ((base) + (ocur_), (cur) - ocur_); \
674 }
675
676#if 0
677#define array_slim(type,stem) \
678 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
679 { \
680 stem ## max = array_roundsize (stem ## cnt >> 1); \
681 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
682 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
683 }
684#endif
685
686#define array_free(stem, idx) \
687 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
688
689/*****************************************************************************/
690
691/* dummy callback for pending events */
692static void noinline
693pendingcb (EV_P_ ev_prepare *w, int revents)
694{
695}
696
697void noinline
698ev_feed_event (EV_P_ void *w, int revents)
699{
700 W w_ = (W)w;
701 int pri = ABSPRI (w_);
702
703 if (expect_false (w_->pending))
704 pendings [pri][w_->pending - 1].events |= revents;
705 else
706 {
707 w_->pending = ++pendingcnt [pri];
708 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
709 pendings [pri][w_->pending - 1].w = w_;
710 pendings [pri][w_->pending - 1].events = revents;
711 }
712}
713
714inline_speed void
715feed_reverse (EV_P_ W w)
716{
717 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
718 rfeeds [rfeedcnt++] = w;
719}
720
721inline_size void
722feed_reverse_done (EV_P_ int revents)
723{
724 do
725 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
726 while (rfeedcnt);
727}
728
729inline_speed void
730queue_events (EV_P_ W *events, int eventcnt, int type)
731{
732 int i;
733
734 for (i = 0; i < eventcnt; ++i)
735 ev_feed_event (EV_A_ events [i], type);
736}
737
738/*****************************************************************************/
739
740inline_speed void
741fd_event (EV_P_ int fd, int revents)
742{
743 ANFD *anfd = anfds + fd;
744 ev_io *w;
745
746 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
747 {
748 int ev = w->events & revents;
749
750 if (ev)
751 ev_feed_event (EV_A_ (W)w, ev);
752 }
753}
754
755void
756ev_feed_fd_event (EV_P_ int fd, int revents)
757{
758 if (fd >= 0 && fd < anfdmax)
759 fd_event (EV_A_ fd, revents);
760}
761
762/* make sure the external fd watch events are in-sync */
763/* with the kernel/libev internal state */
764inline_size void
765fd_reify (EV_P)
766{
767 int i;
768
769 for (i = 0; i < fdchangecnt; ++i)
770 {
771 int fd = fdchanges [i];
772 ANFD *anfd = anfds + fd;
773 ev_io *w;
774
775 unsigned char events = 0;
776
777 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
778 events |= (unsigned char)w->events;
779
780#if EV_SELECT_IS_WINSOCKET
781 if (events)
782 {
783 unsigned long arg;
784 #ifdef EV_FD_TO_WIN32_HANDLE
785 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
786 #else
787 anfd->handle = _get_osfhandle (fd);
788 #endif
789 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
790 }
791#endif
792
793 {
794 unsigned char o_events = anfd->events;
795 unsigned char o_reify = anfd->reify;
796
797 anfd->reify = 0;
798 anfd->events = events;
799
800 if (o_events != events || o_reify & EV__IOFDSET)
801 backend_modify (EV_A_ fd, o_events, events);
802 }
803 }
804
805 fdchangecnt = 0;
806}
807
808/* something about the given fd changed */
809inline_size void
810fd_change (EV_P_ int fd, int flags)
811{
812 unsigned char reify = anfds [fd].reify;
813 anfds [fd].reify |= flags;
814
815 if (expect_true (!reify))
816 {
817 ++fdchangecnt;
818 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
819 fdchanges [fdchangecnt - 1] = fd;
820 }
821}
822
823/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
824inline_speed void
825fd_kill (EV_P_ int fd)
826{
827 ev_io *w;
828
829 while ((w = (ev_io *)anfds [fd].head))
830 {
831 ev_io_stop (EV_A_ w);
832 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
833 }
834}
835
836/* check whether the given fd is atcually valid, for error recovery */
837inline_size int
838fd_valid (int fd)
839{
840#ifdef _WIN32
841 return _get_osfhandle (fd) != -1;
842#else
843 return fcntl (fd, F_GETFD) != -1;
844#endif
845}
846
847/* called on EBADF to verify fds */
848static void noinline
849fd_ebadf (EV_P)
850{
851 int fd;
852
853 for (fd = 0; fd < anfdmax; ++fd)
854 if (anfds [fd].events)
855 if (!fd_valid (fd) && errno == EBADF)
856 fd_kill (EV_A_ fd);
857}
858
859/* called on ENOMEM in select/poll to kill some fds and retry */
860static void noinline
861fd_enomem (EV_P)
862{
863 int fd;
864
865 for (fd = anfdmax; fd--; )
866 if (anfds [fd].events)
867 {
868 fd_kill (EV_A_ fd);
869 return;
870 }
871}
872
873/* usually called after fork if backend needs to re-arm all fds from scratch */
874static void noinline
875fd_rearm_all (EV_P)
876{
877 int fd;
878
879 for (fd = 0; fd < anfdmax; ++fd)
880 if (anfds [fd].events)
881 {
882 anfds [fd].events = 0;
883 anfds [fd].emask = 0;
884 fd_change (EV_A_ fd, EV__IOFDSET | 1);
885 }
886}
887
888/*****************************************************************************/
889
890/*
891 * the heap functions want a real array index. array index 0 uis guaranteed to not
892 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
893 * the branching factor of the d-tree.
894 */
895
896/*
897 * at the moment we allow libev the luxury of two heaps,
898 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
899 * which is more cache-efficient.
900 * the difference is about 5% with 50000+ watchers.
901 */
902#if EV_USE_4HEAP
903
904#define DHEAP 4
905#define HEAP0 (DHEAP - 1) /* index of first element in heap */
906#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
907#define UPHEAP_DONE(p,k) ((p) == (k))
908
909/* away from the root */
910inline_speed void
911downheap (ANHE *heap, int N, int k)
912{
913 ANHE he = heap [k];
914 ANHE *E = heap + N + HEAP0;
915
916 for (;;)
917 {
918 ev_tstamp minat;
919 ANHE *minpos;
920 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
921
922 /* find minimum child */
923 if (expect_true (pos + DHEAP - 1 < E))
924 {
925 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
926 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
927 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
928 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
929 }
930 else if (pos < E)
931 {
932 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
933 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
934 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
935 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
936 }
937 else
938 break;
939
940 if (ANHE_at (he) <= minat)
941 break;
942
943 heap [k] = *minpos;
944 ev_active (ANHE_w (*minpos)) = k;
945
946 k = minpos - heap;
947 }
948
949 heap [k] = he;
950 ev_active (ANHE_w (he)) = k;
951}
952
953#else /* 4HEAP */
954
955#define HEAP0 1
956#define HPARENT(k) ((k) >> 1)
957#define UPHEAP_DONE(p,k) (!(p))
958
959/* away from the root */
960inline_speed void
961downheap (ANHE *heap, int N, int k)
962{
963 ANHE he = heap [k];
964
965 for (;;)
966 {
967 int c = k << 1;
968
969 if (c > N + HEAP0 - 1)
970 break;
971
972 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
973 ? 1 : 0;
974
975 if (ANHE_at (he) <= ANHE_at (heap [c]))
976 break;
977
978 heap [k] = heap [c];
979 ev_active (ANHE_w (heap [k])) = k;
980
981 k = c;
982 }
983
984 heap [k] = he;
985 ev_active (ANHE_w (he)) = k;
986}
987#endif
988
989/* towards the root */
990inline_speed void
991upheap (ANHE *heap, int k)
992{
993 ANHE he = heap [k];
994
995 for (;;)
996 {
997 int p = HPARENT (k);
998
999 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1000 break;
1001
1002 heap [k] = heap [p];
1003 ev_active (ANHE_w (heap [k])) = k;
1004 k = p;
1005 }
1006
1007 heap [k] = he;
1008 ev_active (ANHE_w (he)) = k;
1009}
1010
1011/* move an element suitably so it is in a correct place */
1012inline_size void
1013adjustheap (ANHE *heap, int N, int k)
1014{
1015 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
1016 upheap (heap, k);
1017 else
1018 downheap (heap, N, k);
1019}
1020
1021/* rebuild the heap: this function is used only once and executed rarely */
1022inline_size void
1023reheap (ANHE *heap, int N)
1024{
1025 int i;
1026
1027 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1028 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1029 for (i = 0; i < N; ++i)
1030 upheap (heap, i + HEAP0);
1031}
1032
1033/*****************************************************************************/
1034
1035/* associate signal watchers to a signal signal */
88typedef struct 1036typedef struct
89{ 1037{
90 struct ev_io *head; 1038 WL head;
91 unsigned char wev, rev; /* want, received event set */ 1039 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; 1040} ANSIG;
209 1041
210static ANSIG *signals; 1042static ANSIG *signals;
211static int signalmax; 1043static int signalmax;
212 1044
213static int sigpipe [2]; 1045static EV_ATOMIC_T gotsig;
214static sig_atomic_t gotsig;
215static struct ev_io sigev;
216
217static void
218signals_init (ANSIG *base, int count)
219{
220 while (count--)
221 {
222 base->head = 0;
223 base->gotsig = 0;
224 ++base;
225 }
226}
227
228static void
229sighandler (int signum)
230{
231 signals [signum - 1].gotsig = 1;
232
233 if (!gotsig)
234 {
235 gotsig = 1;
236 write (sigpipe [1], &gotsig, 1);
237 }
238}
239
240static void
241sigcb (struct ev_io *iow, int revents)
242{
243 struct ev_signal *w;
244 int sig;
245
246 gotsig = 0;
247 read (sigpipe [0], &revents, 1);
248
249 for (sig = signalmax; sig--; )
250 if (signals [sig].gotsig)
251 {
252 signals [sig].gotsig = 0;
253
254 for (w = signals [sig].head; w; w = w->next)
255 event ((struct ev_watcher *)w, EV_SIGNAL);
256 }
257}
258
259static void
260siginit (void)
261{
262 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
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 1046
273/*****************************************************************************/ 1047/*****************************************************************************/
274 1048
275static struct ev_idle **idles; 1049/* used to prepare libev internal fd's */
276static int idlemax, idlecnt; 1050/* this is not fork-safe */
277 1051inline_speed void
278static struct ev_check **checks; 1052fd_intern (int fd)
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{ 1053{
292#if HAVE_MONOTONIC 1054#ifdef _WIN32
293 { 1055 unsigned long arg = 1;
294 struct timespec ts; 1056 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
295 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1057#else
296 have_monotonic = 1; 1058 fcntl (fd, F_SETFD, FD_CLOEXEC);
297 } 1059 fcntl (fd, F_SETFL, O_NONBLOCK);
298#endif 1060#endif
1061}
299 1062
300 ev_now = ev_time (); 1063static void noinline
301 now = get_clock (); 1064evpipe_init (EV_P)
302 diff = ev_now - now; 1065{
303 1066 if (!ev_is_active (&pipe_w))
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 } 1067 {
320 1068#if EV_USE_EVENTFD
321 return ev_method; 1069 if ((evfd = eventfd (0, 0)) >= 0)
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 { 1070 {
368 method_modify (fd, anfd->wev, wev); 1071 evpipe [0] = -1;
369 anfd->wev = wev; 1072 fd_intern (evfd);
370 } 1073 ev_io_set (&pipe_w, evfd, EV_READ);
371 }
372
373 fdchangecnt = 0;
374}
375
376static void
377call_pending ()
378{
379 int i;
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 }
391
392 pendingcnt = 0;
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
402 /* first reschedule or stop timer */
403 if (w->repeat)
404 {
405 if (w->is_abs)
406 w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
407 else
408 w->at = now + w->repeat;
409
410 assert (w->at > now);
411
412 downheap (timers, timercnt, 0);
413 } 1074 }
414 else 1075 else
1076#endif
415 { 1077 {
416 evtimer_stop (w); /* nonrepeating: stop timer */ 1078 while (pipe (evpipe))
417 --timercnt; /* maybe pass by reference instead? */ 1079 ev_syserr ("(libev) error creating signal/async pipe");
1080
1081 fd_intern (evpipe [0]);
1082 fd_intern (evpipe [1]);
1083 ev_io_set (&pipe_w, evpipe [0], EV_READ);
418 } 1084 }
419 1085
420 event ((struct ev_watcher *)w, EV_TIMEOUT); 1086 ev_io_start (EV_A_ &pipe_w);
1087 ev_unref (EV_A); /* watcher should not keep loop alive */
1088 }
1089}
1090
1091inline_size void
1092evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1093{
1094 if (!*flag)
421 } 1095 {
422} 1096 int old_errno = errno; /* save errno because write might clobber it */
423 1097
1098 *flag = 1;
1099
1100#if EV_USE_EVENTFD
1101 if (evfd >= 0)
1102 {
1103 uint64_t counter = 1;
1104 write (evfd, &counter, sizeof (uint64_t));
1105 }
1106 else
1107#endif
1108 write (evpipe [1], &old_errno, 1);
1109
1110 errno = old_errno;
1111 }
1112}
1113
1114/* called whenever the libev signal pipe */
1115/* got some events (signal, async) */
424static void 1116static void
425time_update () 1117pipecb (EV_P_ ev_io *iow, int revents)
1118{
1119#if EV_USE_EVENTFD
1120 if (evfd >= 0)
1121 {
1122 uint64_t counter;
1123 read (evfd, &counter, sizeof (uint64_t));
1124 }
1125 else
1126#endif
1127 {
1128 char dummy;
1129 read (evpipe [0], &dummy, 1);
1130 }
1131
1132 if (gotsig && ev_is_default_loop (EV_A))
1133 {
1134 int signum;
1135 gotsig = 0;
1136
1137 for (signum = signalmax; signum--; )
1138 if (signals [signum].gotsig)
1139 ev_feed_signal_event (EV_A_ signum + 1);
1140 }
1141
1142#if EV_ASYNC_ENABLE
1143 if (gotasync)
1144 {
1145 int i;
1146 gotasync = 0;
1147
1148 for (i = asynccnt; i--; )
1149 if (asyncs [i]->sent)
1150 {
1151 asyncs [i]->sent = 0;
1152 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1153 }
1154 }
1155#endif
1156}
1157
1158/*****************************************************************************/
1159
1160static void
1161ev_sighandler (int signum)
1162{
1163#if EV_MULTIPLICITY
1164 struct ev_loop *loop = &default_loop_struct;
1165#endif
1166
1167#if _WIN32
1168 signal (signum, ev_sighandler);
1169#endif
1170
1171 signals [signum - 1].gotsig = 1;
1172 evpipe_write (EV_A_ &gotsig);
1173}
1174
1175void noinline
1176ev_feed_signal_event (EV_P_ int signum)
1177{
1178 WL w;
1179
1180#if EV_MULTIPLICITY
1181 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1182#endif
1183
1184 --signum;
1185
1186 if (signum < 0 || signum >= signalmax)
1187 return;
1188
1189 signals [signum].gotsig = 0;
1190
1191 for (w = signals [signum].head; w; w = w->next)
1192 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1193}
1194
1195/*****************************************************************************/
1196
1197static WL childs [EV_PID_HASHSIZE];
1198
1199#ifndef _WIN32
1200
1201static ev_signal childev;
1202
1203#ifndef WIFCONTINUED
1204# define WIFCONTINUED(status) 0
1205#endif
1206
1207/* handle a single child status event */
1208inline_speed void
1209child_reap (EV_P_ int chain, int pid, int status)
1210{
1211 ev_child *w;
1212 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1213
1214 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1215 {
1216 if ((w->pid == pid || !w->pid)
1217 && (!traced || (w->flags & 1)))
1218 {
1219 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1220 w->rpid = pid;
1221 w->rstatus = status;
1222 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1223 }
1224 }
1225}
1226
1227#ifndef WCONTINUED
1228# define WCONTINUED 0
1229#endif
1230
1231/* called on sigchld etc., calls waitpid */
1232static void
1233childcb (EV_P_ ev_signal *sw, int revents)
1234{
1235 int pid, status;
1236
1237 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1238 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1239 if (!WCONTINUED
1240 || errno != EINVAL
1241 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1242 return;
1243
1244 /* make sure we are called again until all children have been reaped */
1245 /* we need to do it this way so that the callback gets called before we continue */
1246 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1247
1248 child_reap (EV_A_ pid, pid, status);
1249 if (EV_PID_HASHSIZE > 1)
1250 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1251}
1252
1253#endif
1254
1255/*****************************************************************************/
1256
1257#if EV_USE_PORT
1258# include "ev_port.c"
1259#endif
1260#if EV_USE_KQUEUE
1261# include "ev_kqueue.c"
1262#endif
1263#if EV_USE_EPOLL
1264# include "ev_epoll.c"
1265#endif
1266#if EV_USE_POLL
1267# include "ev_poll.c"
1268#endif
1269#if EV_USE_SELECT
1270# include "ev_select.c"
1271#endif
1272
1273int
1274ev_version_major (void)
1275{
1276 return EV_VERSION_MAJOR;
1277}
1278
1279int
1280ev_version_minor (void)
1281{
1282 return EV_VERSION_MINOR;
1283}
1284
1285/* return true if we are running with elevated privileges and should ignore env variables */
1286int inline_size
1287enable_secure (void)
1288{
1289#ifdef _WIN32
1290 return 0;
1291#else
1292 return getuid () != geteuid ()
1293 || getgid () != getegid ();
1294#endif
1295}
1296
1297unsigned int
1298ev_supported_backends (void)
1299{
1300 unsigned int flags = 0;
1301
1302 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1303 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1304 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1305 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1306 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1307
1308 return flags;
1309}
1310
1311unsigned int
1312ev_recommended_backends (void)
1313{
1314 unsigned int flags = ev_supported_backends ();
1315
1316#ifndef __NetBSD__
1317 /* kqueue is borked on everything but netbsd apparently */
1318 /* it usually doesn't work correctly on anything but sockets and pipes */
1319 flags &= ~EVBACKEND_KQUEUE;
1320#endif
1321#ifdef __APPLE__
1322 /* only select works correctly on that "unix-certified" platform */
1323 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1324 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1325#endif
1326
1327 return flags;
1328}
1329
1330unsigned int
1331ev_embeddable_backends (void)
1332{
1333 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1334
1335 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1336 /* please fix it and tell me how to detect the fix */
1337 flags &= ~EVBACKEND_EPOLL;
1338
1339 return flags;
1340}
1341
1342unsigned int
1343ev_backend (EV_P)
1344{
1345 return backend;
1346}
1347
1348unsigned int
1349ev_loop_count (EV_P)
1350{
1351 return loop_count;
1352}
1353
1354void
1355ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1356{
1357 io_blocktime = interval;
1358}
1359
1360void
1361ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1362{
1363 timeout_blocktime = interval;
1364}
1365
1366/* initialise a loop structure, must be zero-initialised */
1367static void noinline
1368loop_init (EV_P_ unsigned int flags)
1369{
1370 if (!backend)
1371 {
1372#if EV_USE_REALTIME
1373 if (!have_realtime)
1374 {
1375 struct timespec ts;
1376
1377 if (!clock_gettime (CLOCK_REALTIME, &ts))
1378 have_realtime = 1;
1379 }
1380#endif
1381
1382#if EV_USE_MONOTONIC
1383 if (!have_monotonic)
1384 {
1385 struct timespec ts;
1386
1387 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1388 have_monotonic = 1;
1389 }
1390#endif
1391
1392 ev_rt_now = ev_time ();
1393 mn_now = get_clock ();
1394 now_floor = mn_now;
1395 rtmn_diff = ev_rt_now - mn_now;
1396
1397 io_blocktime = 0.;
1398 timeout_blocktime = 0.;
1399 backend = 0;
1400 backend_fd = -1;
1401 gotasync = 0;
1402#if EV_USE_INOTIFY
1403 fs_fd = -2;
1404#endif
1405
1406 /* pid check not overridable via env */
1407#ifndef _WIN32
1408 if (flags & EVFLAG_FORKCHECK)
1409 curpid = getpid ();
1410#endif
1411
1412 if (!(flags & EVFLAG_NOENV)
1413 && !enable_secure ()
1414 && getenv ("LIBEV_FLAGS"))
1415 flags = atoi (getenv ("LIBEV_FLAGS"));
1416
1417 if (!(flags & 0x0000ffffU))
1418 flags |= ev_recommended_backends ();
1419
1420#if EV_USE_PORT
1421 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1422#endif
1423#if EV_USE_KQUEUE
1424 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1425#endif
1426#if EV_USE_EPOLL
1427 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1428#endif
1429#if EV_USE_POLL
1430 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1431#endif
1432#if EV_USE_SELECT
1433 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1434#endif
1435
1436 ev_prepare_init (&pending_w, pendingcb);
1437
1438 ev_init (&pipe_w, pipecb);
1439 ev_set_priority (&pipe_w, EV_MAXPRI);
1440 }
1441}
1442
1443/* free up a loop structure */
1444static void noinline
1445loop_destroy (EV_P)
426{ 1446{
427 int i; 1447 int i;
428 ev_now = ev_time ();
429 1448
430 if (have_monotonic) 1449 if (ev_is_active (&pipe_w))
431 { 1450 {
432 ev_tstamp odiff = diff; 1451 ev_ref (EV_A); /* signal watcher */
1452 ev_io_stop (EV_A_ &pipe_w);
433 1453
434 /* detecting time jumps is much more difficult */ 1454#if EV_USE_EVENTFD
435 for (i = 2; --i; ) /* loop a few times, before making important decisions */ 1455 if (evfd >= 0)
1456 close (evfd);
1457#endif
1458
1459 if (evpipe [0] >= 0)
436 { 1460 {
1461 close (evpipe [0]);
1462 close (evpipe [1]);
1463 }
1464 }
1465
1466#if EV_USE_INOTIFY
1467 if (fs_fd >= 0)
1468 close (fs_fd);
1469#endif
1470
1471 if (backend_fd >= 0)
1472 close (backend_fd);
1473
1474#if EV_USE_PORT
1475 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1476#endif
1477#if EV_USE_KQUEUE
1478 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1479#endif
1480#if EV_USE_EPOLL
1481 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1482#endif
1483#if EV_USE_POLL
1484 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1485#endif
1486#if EV_USE_SELECT
1487 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1488#endif
1489
1490 for (i = NUMPRI; i--; )
1491 {
1492 array_free (pending, [i]);
1493#if EV_IDLE_ENABLE
1494 array_free (idle, [i]);
1495#endif
1496 }
1497
1498 ev_free (anfds); anfdmax = 0;
1499
1500 /* have to use the microsoft-never-gets-it-right macro */
1501 array_free (rfeed, EMPTY);
1502 array_free (fdchange, EMPTY);
1503 array_free (timer, EMPTY);
1504#if EV_PERIODIC_ENABLE
1505 array_free (periodic, EMPTY);
1506#endif
1507#if EV_FORK_ENABLE
1508 array_free (fork, EMPTY);
1509#endif
1510 array_free (prepare, EMPTY);
1511 array_free (check, EMPTY);
1512#if EV_ASYNC_ENABLE
1513 array_free (async, EMPTY);
1514#endif
1515
1516 backend = 0;
1517}
1518
1519#if EV_USE_INOTIFY
1520inline_size void infy_fork (EV_P);
1521#endif
1522
1523inline_size void
1524loop_fork (EV_P)
1525{
1526#if EV_USE_PORT
1527 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1528#endif
1529#if EV_USE_KQUEUE
1530 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1531#endif
1532#if EV_USE_EPOLL
1533 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1534#endif
1535#if EV_USE_INOTIFY
1536 infy_fork (EV_A);
1537#endif
1538
1539 if (ev_is_active (&pipe_w))
1540 {
1541 /* this "locks" the handlers against writing to the pipe */
1542 /* while we modify the fd vars */
1543 gotsig = 1;
1544#if EV_ASYNC_ENABLE
1545 gotasync = 1;
1546#endif
1547
1548 ev_ref (EV_A);
1549 ev_io_stop (EV_A_ &pipe_w);
1550
1551#if EV_USE_EVENTFD
1552 if (evfd >= 0)
1553 close (evfd);
1554#endif
1555
1556 if (evpipe [0] >= 0)
1557 {
1558 close (evpipe [0]);
1559 close (evpipe [1]);
1560 }
1561
1562 evpipe_init (EV_A);
1563 /* now iterate over everything, in case we missed something */
1564 pipecb (EV_A_ &pipe_w, EV_READ);
1565 }
1566
1567 postfork = 0;
1568}
1569
1570#if EV_MULTIPLICITY
1571
1572struct ev_loop *
1573ev_loop_new (unsigned int flags)
1574{
1575 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1576
1577 memset (loop, 0, sizeof (struct ev_loop));
1578
1579 loop_init (EV_A_ flags);
1580
1581 if (ev_backend (EV_A))
1582 return loop;
1583
1584 return 0;
1585}
1586
1587void
1588ev_loop_destroy (EV_P)
1589{
1590 loop_destroy (EV_A);
1591 ev_free (loop);
1592}
1593
1594void
1595ev_loop_fork (EV_P)
1596{
1597 postfork = 1; /* must be in line with ev_default_fork */
1598}
1599
1600#if EV_VERIFY
1601static void noinline
1602verify_watcher (EV_P_ W w)
1603{
1604 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1605
1606 if (w->pending)
1607 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1608}
1609
1610static void noinline
1611verify_heap (EV_P_ ANHE *heap, int N)
1612{
1613 int i;
1614
1615 for (i = HEAP0; i < N + HEAP0; ++i)
1616 {
1617 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1618 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1619 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1620
1621 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1622 }
1623}
1624
1625static void noinline
1626array_verify (EV_P_ W *ws, int cnt)
1627{
1628 while (cnt--)
1629 {
1630 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1631 verify_watcher (EV_A_ ws [cnt]);
1632 }
1633}
1634#endif
1635
1636void
1637ev_loop_verify (EV_P)
1638{
1639#if EV_VERIFY
1640 int i;
1641 WL w;
1642
1643 assert (activecnt >= -1);
1644
1645 assert (fdchangemax >= fdchangecnt);
1646 for (i = 0; i < fdchangecnt; ++i)
1647 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1648
1649 assert (anfdmax >= 0);
1650 for (i = 0; i < anfdmax; ++i)
1651 for (w = anfds [i].head; w; w = w->next)
1652 {
1653 verify_watcher (EV_A_ (W)w);
1654 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1655 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1656 }
1657
1658 assert (timermax >= timercnt);
1659 verify_heap (EV_A_ timers, timercnt);
1660
1661#if EV_PERIODIC_ENABLE
1662 assert (periodicmax >= periodiccnt);
1663 verify_heap (EV_A_ periodics, periodiccnt);
1664#endif
1665
1666 for (i = NUMPRI; i--; )
1667 {
1668 assert (pendingmax [i] >= pendingcnt [i]);
1669#if EV_IDLE_ENABLE
1670 assert (idleall >= 0);
1671 assert (idlemax [i] >= idlecnt [i]);
1672 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1673#endif
1674 }
1675
1676#if EV_FORK_ENABLE
1677 assert (forkmax >= forkcnt);
1678 array_verify (EV_A_ (W *)forks, forkcnt);
1679#endif
1680
1681#if EV_ASYNC_ENABLE
1682 assert (asyncmax >= asynccnt);
1683 array_verify (EV_A_ (W *)asyncs, asynccnt);
1684#endif
1685
1686 assert (preparemax >= preparecnt);
1687 array_verify (EV_A_ (W *)prepares, preparecnt);
1688
1689 assert (checkmax >= checkcnt);
1690 array_verify (EV_A_ (W *)checks, checkcnt);
1691
1692# if 0
1693 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1694 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1695# endif
1696#endif
1697}
1698
1699#endif /* multiplicity */
1700
1701#if EV_MULTIPLICITY
1702struct ev_loop *
1703ev_default_loop_init (unsigned int flags)
1704#else
1705int
1706ev_default_loop (unsigned int flags)
1707#endif
1708{
1709 if (!ev_default_loop_ptr)
1710 {
1711#if EV_MULTIPLICITY
1712 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1713#else
1714 ev_default_loop_ptr = 1;
1715#endif
1716
1717 loop_init (EV_A_ flags);
1718
1719 if (ev_backend (EV_A))
1720 {
1721#ifndef _WIN32
1722 ev_signal_init (&childev, childcb, SIGCHLD);
1723 ev_set_priority (&childev, EV_MAXPRI);
1724 ev_signal_start (EV_A_ &childev);
1725 ev_unref (EV_A); /* child watcher should not keep loop alive */
1726#endif
1727 }
1728 else
1729 ev_default_loop_ptr = 0;
1730 }
1731
1732 return ev_default_loop_ptr;
1733}
1734
1735void
1736ev_default_destroy (void)
1737{
1738#if EV_MULTIPLICITY
1739 struct ev_loop *loop = ev_default_loop_ptr;
1740#endif
1741
1742 ev_default_loop_ptr = 0;
1743
1744#ifndef _WIN32
1745 ev_ref (EV_A); /* child watcher */
1746 ev_signal_stop (EV_A_ &childev);
1747#endif
1748
1749 loop_destroy (EV_A);
1750}
1751
1752void
1753ev_default_fork (void)
1754{
1755#if EV_MULTIPLICITY
1756 struct ev_loop *loop = ev_default_loop_ptr;
1757#endif
1758
1759 postfork = 1; /* must be in line with ev_loop_fork */
1760}
1761
1762/*****************************************************************************/
1763
1764void
1765ev_invoke (EV_P_ void *w, int revents)
1766{
1767 EV_CB_INVOKE ((W)w, revents);
1768}
1769
1770inline_speed void
1771call_pending (EV_P)
1772{
1773 int pri;
1774
1775 for (pri = NUMPRI; pri--; )
1776 while (pendingcnt [pri])
1777 {
1778 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1779
1780 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1781 /* ^ this is no longer true, as pending_w could be here */
1782
1783 p->w->pending = 0;
1784 EV_CB_INVOKE (p->w, p->events);
1785 EV_FREQUENT_CHECK;
1786 }
1787}
1788
1789#if EV_IDLE_ENABLE
1790/* make idle watchers pending. this handles the "call-idle */
1791/* only when higher priorities are idle" logic */
1792inline_size void
1793idle_reify (EV_P)
1794{
1795 if (expect_false (idleall))
1796 {
1797 int pri;
1798
1799 for (pri = NUMPRI; pri--; )
1800 {
1801 if (pendingcnt [pri])
1802 break;
1803
1804 if (idlecnt [pri])
1805 {
1806 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1807 break;
1808 }
1809 }
1810 }
1811}
1812#endif
1813
1814/* make timers pending */
1815inline_size void
1816timers_reify (EV_P)
1817{
1818 EV_FREQUENT_CHECK;
1819
1820 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1821 {
1822 do
1823 {
1824 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1825
1826 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
1827
1828 /* first reschedule or stop timer */
1829 if (w->repeat)
1830 {
1831 ev_at (w) += w->repeat;
1832 if (ev_at (w) < mn_now)
1833 ev_at (w) = mn_now;
1834
1835 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1836
1837 ANHE_at_cache (timers [HEAP0]);
1838 downheap (timers, timercnt, HEAP0);
1839 }
1840 else
1841 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1842
1843 EV_FREQUENT_CHECK;
1844 feed_reverse (EV_A_ (W)w);
1845 }
1846 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1847
1848 feed_reverse_done (EV_A_ EV_TIMEOUT);
1849 }
1850}
1851
1852#if EV_PERIODIC_ENABLE
1853/* make periodics pending */
1854inline_size void
1855periodics_reify (EV_P)
1856{
1857 EV_FREQUENT_CHECK;
1858
1859 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1860 {
1861 int feed_count = 0;
1862
1863 do
1864 {
1865 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1866
1867 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1868
1869 /* first reschedule or stop timer */
1870 if (w->reschedule_cb)
1871 {
1872 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1873
1874 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1875
1876 ANHE_at_cache (periodics [HEAP0]);
1877 downheap (periodics, periodiccnt, HEAP0);
1878 }
1879 else if (w->interval)
1880 {
1881 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1882 /* if next trigger time is not sufficiently in the future, put it there */
1883 /* this might happen because of floating point inexactness */
1884 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1885 {
1886 ev_at (w) += w->interval;
1887
1888 /* if interval is unreasonably low we might still have a time in the past */
1889 /* so correct this. this will make the periodic very inexact, but the user */
1890 /* has effectively asked to get triggered more often than possible */
1891 if (ev_at (w) < ev_rt_now)
1892 ev_at (w) = ev_rt_now;
1893 }
1894
1895 ANHE_at_cache (periodics [HEAP0]);
1896 downheap (periodics, periodiccnt, HEAP0);
1897 }
1898 else
1899 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1900
1901 EV_FREQUENT_CHECK;
1902 feed_reverse (EV_A_ (W)w);
1903 }
1904 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1905
1906 feed_reverse_done (EV_A_ EV_PERIODIC);
1907 }
1908}
1909
1910/* simply recalculate all periodics */
1911/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1912static void noinline
1913periodics_reschedule (EV_P)
1914{
1915 int i;
1916
1917 /* adjust periodics after time jump */
1918 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1919 {
1920 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1921
1922 if (w->reschedule_cb)
1923 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1924 else if (w->interval)
1925 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1926
1927 ANHE_at_cache (periodics [i]);
1928 }
1929
1930 reheap (periodics, periodiccnt);
1931}
1932#endif
1933
1934/* adjust all timers by a given offset */
1935static void noinline
1936timers_reschedule (EV_P_ ev_tstamp adjust)
1937{
1938 int i;
1939
1940 for (i = 0; i < timercnt; ++i)
1941 {
1942 ANHE *he = timers + i + HEAP0;
1943 ANHE_w (*he)->at += adjust;
1944 ANHE_at_cache (*he);
1945 }
1946}
1947
1948/* fetch new monotonic and realtime times from the kernel */
1949/* also detetc if there was a timejump, and act accordingly */
1950inline_speed void
1951time_update (EV_P_ ev_tstamp max_block)
1952{
1953 int i;
1954
1955#if EV_USE_MONOTONIC
1956 if (expect_true (have_monotonic))
1957 {
1958 ev_tstamp odiff = rtmn_diff;
1959
437 now = get_clock (); 1960 mn_now = get_clock ();
1961
1962 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1963 /* interpolate in the meantime */
1964 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1965 {
1966 ev_rt_now = rtmn_diff + mn_now;
1967 return;
1968 }
1969
1970 now_floor = mn_now;
1971 ev_rt_now = ev_time ();
1972
1973 /* loop a few times, before making important decisions.
1974 * on the choice of "4": one iteration isn't enough,
1975 * in case we get preempted during the calls to
1976 * ev_time and get_clock. a second call is almost guaranteed
1977 * to succeed in that case, though. and looping a few more times
1978 * doesn't hurt either as we only do this on time-jumps or
1979 * in the unlikely event of having been preempted here.
1980 */
1981 for (i = 4; --i; )
1982 {
438 diff = ev_now - now; 1983 rtmn_diff = ev_rt_now - mn_now;
439 1984
440 if (fabs (odiff - diff) < MIN_TIMEJUMP) 1985 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
441 return; /* all is well */ 1986 return; /* all is well */
442 1987
443 ev_now = ev_time (); 1988 ev_rt_now = ev_time ();
1989 mn_now = get_clock ();
1990 now_floor = mn_now;
444 } 1991 }
445 1992
446 /* time jump detected, reschedule atimers */ 1993 /* no timer adjustment, as the monotonic clock doesn't jump */
447 for (i = 0; i < atimercnt; ++i) 1994 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1995# if EV_PERIODIC_ENABLE
1996 periodics_reschedule (EV_A);
1997# endif
1998 }
1999 else
2000#endif
2001 {
2002 ev_rt_now = ev_time ();
2003
2004 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
448 { 2005 {
449 struct ev_timer *w = atimers [i]; 2006 /* adjust timers. this is easy, as the offset is the same for all of them */
450 w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat; 2007 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2008#if EV_PERIODIC_ENABLE
2009 periodics_reschedule (EV_A);
2010#endif
451 } 2011 }
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 2012
460 now = ev_now; 2013 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 { 2014 }
473 queue_events (checks, checkcnt, EV_CHECK); 2015}
474 call_pending (); 2016
475 } 2017static int loop_done;
2018
2019void
2020ev_loop (EV_P_ int flags)
2021{
2022 loop_done = EVUNLOOP_CANCEL;
2023
2024 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
476 2025
477 do 2026 do
478 { 2027 {
2028#if EV_VERIFY >= 2
2029 ev_loop_verify (EV_A);
2030#endif
2031
2032#ifndef _WIN32
2033 if (expect_false (curpid)) /* penalise the forking check even more */
2034 if (expect_false (getpid () != curpid))
2035 {
2036 curpid = getpid ();
2037 postfork = 1;
2038 }
2039#endif
2040
2041#if EV_FORK_ENABLE
2042 /* we might have forked, so queue fork handlers */
2043 if (expect_false (postfork))
2044 if (forkcnt)
2045 {
2046 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2047 call_pending (EV_A);
2048 }
2049#endif
2050
2051 /* queue prepare watchers (and execute them) */
2052 if (expect_false (preparecnt))
2053 {
2054 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2055 call_pending (EV_A);
2056 }
2057
2058 /* we might have forked, so reify kernel state if necessary */
2059 if (expect_false (postfork))
2060 loop_fork (EV_A);
2061
479 /* update fd-related kernel structures */ 2062 /* update fd-related kernel structures */
480 fd_reify (); 2063 fd_reify (EV_A);
481 2064
482 /* calculate blocking time */ 2065 /* calculate blocking time */
483 if (flags & EVLOOP_NONBLOCK || idlecnt) 2066 {
484 block = 0.; 2067 ev_tstamp waittime = 0.;
485 else 2068 ev_tstamp sleeptime = 0.;
2069
2070 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
486 { 2071 {
2072 /* update time to cancel out callback processing overhead */
2073 time_update (EV_A_ 1e100);
2074
487 block = MAX_BLOCKTIME; 2075 waittime = MAX_BLOCKTIME;
488 2076
489 if (rtimercnt) 2077 if (timercnt)
490 { 2078 {
491 ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge; 2079 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
492 if (block > to) block = to; 2080 if (waittime > to) waittime = to;
493 } 2081 }
494 2082
2083#if EV_PERIODIC_ENABLE
495 if (atimercnt) 2084 if (periodiccnt)
496 { 2085 {
497 ev_tstamp to = atimers [0]->at - ev_time () + method_fudge; 2086 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
498 if (block > to) block = to; 2087 if (waittime > to) waittime = to;
499 } 2088 }
2089#endif
500 2090
501 if (block < 0.) block = 0.; 2091 if (expect_false (waittime < timeout_blocktime))
2092 waittime = timeout_blocktime;
2093
2094 sleeptime = waittime - backend_fudge;
2095
2096 if (expect_true (sleeptime > io_blocktime))
2097 sleeptime = io_blocktime;
2098
2099 if (sleeptime)
2100 {
2101 ev_sleep (sleeptime);
2102 waittime -= sleeptime;
2103 }
502 } 2104 }
503 2105
504 method_poll (block); 2106 ++loop_count;
2107 backend_poll (EV_A_ waittime);
505 2108
506 /* update ev_now, do magic */ 2109 /* update ev_rt_now, do magic */
507 time_update (); 2110 time_update (EV_A_ waittime + sleeptime);
2111 }
508 2112
509 /* queue pending timers and reschedule them */ 2113 /* queue pending timers and reschedule them */
510 /* absolute timers first */ 2114 timers_reify (EV_A); /* relative timers called last */
511 timers_reify (atimers, atimercnt, ev_now); 2115#if EV_PERIODIC_ENABLE
512 /* relative timers second */ 2116 periodics_reify (EV_A); /* absolute timers called first */
513 timers_reify (rtimers, rtimercnt, now); 2117#endif
514 2118
2119#if EV_IDLE_ENABLE
515 /* queue idle watchers unless io or timers are pending */ 2120 /* queue idle watchers unless other events are pending */
516 if (!pendingcnt) 2121 idle_reify (EV_A);
517 queue_events (idles, idlecnt, EV_IDLE); 2122#endif
518 2123
519 /* queue check and possibly idle watchers */ 2124 /* queue check watchers, to be executed first */
2125 if (expect_false (checkcnt))
520 queue_events (checks, checkcnt, EV_CHECK); 2126 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
521 2127
522 call_pending (); 2128 call_pending (EV_A);
523 } 2129 }
524 while (!ev_loop_done); 2130 while (expect_true (
2131 activecnt
2132 && !loop_done
2133 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2134 ));
2135
2136 if (loop_done == EVUNLOOP_ONE)
2137 loop_done = EVUNLOOP_CANCEL;
2138}
2139
2140void
2141ev_unloop (EV_P_ int how)
2142{
2143 loop_done = how;
2144}
2145
2146void
2147ev_ref (EV_P)
2148{
2149 ++activecnt;
2150}
2151
2152void
2153ev_unref (EV_P)
2154{
2155 --activecnt;
2156}
2157
2158void
2159ev_now_update (EV_P)
2160{
2161 time_update (EV_A_ 1e100);
2162}
2163
2164void
2165ev_suspend (EV_P)
2166{
2167 ev_now_update (EV_A);
2168}
2169
2170void
2171ev_resume (EV_P)
2172{
2173 ev_tstamp mn_prev = mn_now;
2174
2175 ev_now_update (EV_A);
2176 timers_reschedule (EV_A_ mn_now - mn_prev);
2177#if EV_PERIODIC_ENABLE
2178 /* TODO: really do this? */
2179 periodics_reschedule (EV_A);
2180#endif
525} 2181}
526 2182
527/*****************************************************************************/ 2183/*****************************************************************************/
2184/* singly-linked list management, used when the expected list length is short */
528 2185
529static void 2186inline_size void
530wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem) 2187wlist_add (WL *head, WL elem)
531{ 2188{
532 elem->next = *head; 2189 elem->next = *head;
533 *head = elem; 2190 *head = elem;
534} 2191}
535 2192
536static void 2193inline_size void
537wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem) 2194wlist_del (WL *head, WL elem)
538{ 2195{
539 while (*head) 2196 while (*head)
540 { 2197 {
541 if (*head == elem) 2198 if (*head == elem)
542 { 2199 {
… …
546 2203
547 head = &(*head)->next; 2204 head = &(*head)->next;
548 } 2205 }
549} 2206}
550 2207
551static void 2208/* internal, faster, version of ev_clear_pending */
552ev_start (struct ev_watcher *w, int active) 2209inline_speed void
2210clear_pending (EV_P_ W w)
553{ 2211{
2212 if (w->pending)
2213 {
2214 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
554 w->pending = 0; 2215 w->pending = 0;
2216 }
2217}
2218
2219int
2220ev_clear_pending (EV_P_ void *w)
2221{
2222 W w_ = (W)w;
2223 int pending = w_->pending;
2224
2225 if (expect_true (pending))
2226 {
2227 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2228 p->w = (W)&pending_w;
2229 w_->pending = 0;
2230 return p->events;
2231 }
2232 else
2233 return 0;
2234}
2235
2236inline_size void
2237pri_adjust (EV_P_ W w)
2238{
2239 int pri = w->priority;
2240 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2241 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2242 w->priority = pri;
2243}
2244
2245inline_speed void
2246ev_start (EV_P_ W w, int active)
2247{
2248 pri_adjust (EV_A_ w);
555 w->active = active; 2249 w->active = active;
2250 ev_ref (EV_A);
556} 2251}
557 2252
558static void 2253inline_size void
559ev_stop (struct ev_watcher *w) 2254ev_stop (EV_P_ W w)
560{ 2255{
561 if (w->pending) 2256 ev_unref (EV_A);
562 pendings [w->pending - 1].w = 0;
563
564 w->active = 0; 2257 w->active = 0;
565 /* nop */
566} 2258}
567 2259
568/*****************************************************************************/ 2260/*****************************************************************************/
569 2261
570void 2262void noinline
571evio_start (struct ev_io *w) 2263ev_io_start (EV_P_ ev_io *w)
572{ 2264{
2265 int fd = w->fd;
2266
2267 if (expect_false (ev_is_active (w)))
2268 return;
2269
2270 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2271 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2272
2273 EV_FREQUENT_CHECK;
2274
2275 ev_start (EV_A_ (W)w, 1);
2276 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2277 wlist_add (&anfds[fd].head, (WL)w);
2278
2279 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
2280 w->events &= ~EV__IOFDSET;
2281
2282 EV_FREQUENT_CHECK;
2283}
2284
2285void noinline
2286ev_io_stop (EV_P_ ev_io *w)
2287{
2288 clear_pending (EV_A_ (W)w);
2289 if (expect_false (!ev_is_active (w)))
2290 return;
2291
2292 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2293
2294 EV_FREQUENT_CHECK;
2295
2296 wlist_del (&anfds[w->fd].head, (WL)w);
2297 ev_stop (EV_A_ (W)w);
2298
2299 fd_change (EV_A_ w->fd, 1);
2300
2301 EV_FREQUENT_CHECK;
2302}
2303
2304void noinline
2305ev_timer_start (EV_P_ ev_timer *w)
2306{
2307 if (expect_false (ev_is_active (w)))
2308 return;
2309
2310 ev_at (w) += mn_now;
2311
2312 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2313
2314 EV_FREQUENT_CHECK;
2315
2316 ++timercnt;
2317 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2318 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2319 ANHE_w (timers [ev_active (w)]) = (WT)w;
2320 ANHE_at_cache (timers [ev_active (w)]);
2321 upheap (timers, ev_active (w));
2322
2323 EV_FREQUENT_CHECK;
2324
2325 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2326}
2327
2328void noinline
2329ev_timer_stop (EV_P_ ev_timer *w)
2330{
2331 clear_pending (EV_A_ (W)w);
2332 if (expect_false (!ev_is_active (w)))
2333 return;
2334
2335 EV_FREQUENT_CHECK;
2336
2337 {
2338 int active = ev_active (w);
2339
2340 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2341
2342 --timercnt;
2343
2344 if (expect_true (active < timercnt + HEAP0))
2345 {
2346 timers [active] = timers [timercnt + HEAP0];
2347 adjustheap (timers, timercnt, active);
2348 }
2349 }
2350
2351 EV_FREQUENT_CHECK;
2352
2353 ev_at (w) -= mn_now;
2354
2355 ev_stop (EV_A_ (W)w);
2356}
2357
2358void noinline
2359ev_timer_again (EV_P_ ev_timer *w)
2360{
2361 EV_FREQUENT_CHECK;
2362
573 if (ev_is_active (w)) 2363 if (ev_is_active (w))
2364 {
2365 if (w->repeat)
2366 {
2367 ev_at (w) = mn_now + w->repeat;
2368 ANHE_at_cache (timers [ev_active (w)]);
2369 adjustheap (timers, timercnt, ev_active (w));
2370 }
2371 else
2372 ev_timer_stop (EV_A_ w);
2373 }
2374 else if (w->repeat)
2375 {
2376 ev_at (w) = w->repeat;
2377 ev_timer_start (EV_A_ w);
2378 }
2379
2380 EV_FREQUENT_CHECK;
2381}
2382
2383#if EV_PERIODIC_ENABLE
2384void noinline
2385ev_periodic_start (EV_P_ ev_periodic *w)
2386{
2387 if (expect_false (ev_is_active (w)))
574 return; 2388 return;
575 2389
576 int fd = w->fd; 2390 if (w->reschedule_cb)
2391 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2392 else if (w->interval)
2393 {
2394 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2395 /* this formula differs from the one in periodic_reify because we do not always round up */
2396 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2397 }
2398 else
2399 ev_at (w) = w->offset;
577 2400
578 ev_start ((struct ev_watcher *)w, 1); 2401 EV_FREQUENT_CHECK;
579 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
580 wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
581 2402
582 ++fdchangecnt; 2403 ++periodiccnt;
583 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 2404 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
584 fdchanges [fdchangecnt - 1] = fd; 2405 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
585} 2406 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2407 ANHE_at_cache (periodics [ev_active (w)]);
2408 upheap (periodics, ev_active (w));
586 2409
587void 2410 EV_FREQUENT_CHECK;
588evio_stop (struct ev_io *w) 2411
2412 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2413}
2414
2415void noinline
2416ev_periodic_stop (EV_P_ ev_periodic *w)
589{ 2417{
2418 clear_pending (EV_A_ (W)w);
590 if (!ev_is_active (w)) 2419 if (expect_false (!ev_is_active (w)))
591 return; 2420 return;
592 2421
593 wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w); 2422 EV_FREQUENT_CHECK;
594 ev_stop ((struct ev_watcher *)w);
595 2423
596 ++fdchangecnt; 2424 {
597 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 2425 int active = ev_active (w);
598 fdchanges [fdchangecnt - 1] = w->fd;
599}
600 2426
601void 2427 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
602evtimer_start (struct ev_timer *w) 2428
2429 --periodiccnt;
2430
2431 if (expect_true (active < periodiccnt + HEAP0))
2432 {
2433 periodics [active] = periodics [periodiccnt + HEAP0];
2434 adjustheap (periodics, periodiccnt, active);
2435 }
2436 }
2437
2438 EV_FREQUENT_CHECK;
2439
2440 ev_stop (EV_A_ (W)w);
2441}
2442
2443void noinline
2444ev_periodic_again (EV_P_ ev_periodic *w)
603{ 2445{
2446 /* TODO: use adjustheap and recalculation */
2447 ev_periodic_stop (EV_A_ w);
2448 ev_periodic_start (EV_A_ w);
2449}
2450#endif
2451
2452#ifndef SA_RESTART
2453# define SA_RESTART 0
2454#endif
2455
2456void noinline
2457ev_signal_start (EV_P_ ev_signal *w)
2458{
2459#if EV_MULTIPLICITY
2460 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2461#endif
604 if (ev_is_active (w)) 2462 if (expect_false (ev_is_active (w)))
605 return; 2463 return;
606 2464
607 if (w->is_abs) 2465 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2466
2467 evpipe_init (EV_A);
2468
2469 EV_FREQUENT_CHECK;
2470
608 { 2471 {
609 /* this formula differs from the one in timer_reify becuse we do not round up */ 2472#ifndef _WIN32
610 if (w->repeat) 2473 sigset_t full, prev;
611 w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat; 2474 sigfillset (&full);
2475 sigprocmask (SIG_SETMASK, &full, &prev);
2476#endif
612 2477
613 ev_start ((struct ev_watcher *)w, ++atimercnt); 2478 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
614 array_needsize (atimers, atimermax, atimercnt, ); 2479
615 atimers [atimercnt - 1] = w; 2480#ifndef _WIN32
616 upheap (atimers, atimercnt - 1); 2481 sigprocmask (SIG_SETMASK, &prev, 0);
2482#endif
2483 }
2484
2485 ev_start (EV_A_ (W)w, 1);
2486 wlist_add (&signals [w->signum - 1].head, (WL)w);
2487
2488 if (!((WL)w)->next)
617 } 2489 {
618 else 2490#if _WIN32
2491 signal (w->signum, ev_sighandler);
2492#else
2493 struct sigaction sa;
2494 sa.sa_handler = ev_sighandler;
2495 sigfillset (&sa.sa_mask);
2496 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2497 sigaction (w->signum, &sa, 0);
2498#endif
619 { 2499 }
620 w->at += now;
621 2500
622 ev_start ((struct ev_watcher *)w, ++rtimercnt); 2501 EV_FREQUENT_CHECK;
623 array_needsize (rtimers, rtimermax, rtimercnt, );
624 rtimers [rtimercnt - 1] = w;
625 upheap (rtimers, rtimercnt - 1);
626 }
627
628} 2502}
629 2503
630void 2504void noinline
631evtimer_stop (struct ev_timer *w) 2505ev_signal_stop (EV_P_ ev_signal *w)
632{ 2506{
2507 clear_pending (EV_A_ (W)w);
633 if (!ev_is_active (w)) 2508 if (expect_false (!ev_is_active (w)))
634 return; 2509 return;
635 2510
636 if (w->is_abs) 2511 EV_FREQUENT_CHECK;
637 {
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 2512
653 ev_stop ((struct ev_watcher *)w); 2513 wlist_del (&signals [w->signum - 1].head, (WL)w);
654} 2514 ev_stop (EV_A_ (W)w);
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 2515
685 if (!signals [w->signum - 1].head) 2516 if (!signals [w->signum - 1].head)
686 signal (w->signum, SIG_DFL); 2517 signal (w->signum, SIG_DFL);
687}
688 2518
689void evidle_start (struct ev_idle *w) 2519 EV_FREQUENT_CHECK;
2520}
2521
2522void
2523ev_child_start (EV_P_ ev_child *w)
690{ 2524{
2525#if EV_MULTIPLICITY
2526 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2527#endif
691 if (ev_is_active (w)) 2528 if (expect_false (ev_is_active (w)))
692 return; 2529 return;
693 2530
694 ev_start ((struct ev_watcher *)w, ++idlecnt); 2531 EV_FREQUENT_CHECK;
695 array_needsize (idles, idlemax, idlecnt, );
696 idles [idlecnt - 1] = w;
697}
698 2532
699void evidle_stop (struct ev_idle *w) 2533 ev_start (EV_A_ (W)w, 1);
700{ 2534 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
701 idles [w->active - 1] = idles [--idlecnt];
702 ev_stop ((struct ev_watcher *)w);
703}
704 2535
705void evcheck_start (struct ev_check *w) 2536 EV_FREQUENT_CHECK;
2537}
2538
2539void
2540ev_child_stop (EV_P_ ev_child *w)
706{ 2541{
707 if (ev_is_active (w)) 2542 clear_pending (EV_A_ (W)w);
2543 if (expect_false (!ev_is_active (w)))
708 return; 2544 return;
709 2545
710 ev_start ((struct ev_watcher *)w, ++checkcnt); 2546 EV_FREQUENT_CHECK;
2547
2548 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2549 ev_stop (EV_A_ (W)w);
2550
2551 EV_FREQUENT_CHECK;
2552}
2553
2554#if EV_STAT_ENABLE
2555
2556# ifdef _WIN32
2557# undef lstat
2558# define lstat(a,b) _stati64 (a,b)
2559# endif
2560
2561#define DEF_STAT_INTERVAL 5.0074891
2562#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2563#define MIN_STAT_INTERVAL 0.1074891
2564
2565static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2566
2567#if EV_USE_INOTIFY
2568# define EV_INOTIFY_BUFSIZE 8192
2569
2570static void noinline
2571infy_add (EV_P_ ev_stat *w)
2572{
2573 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);
2574
2575 if (w->wd < 0)
2576 {
2577 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2578 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2579
2580 /* monitor some parent directory for speedup hints */
2581 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2582 /* but an efficiency issue only */
2583 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2584 {
2585 char path [4096];
2586 strcpy (path, w->path);
2587
2588 do
2589 {
2590 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2591 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2592
2593 char *pend = strrchr (path, '/');
2594
2595 if (!pend || pend == path)
2596 break;
2597
2598 *pend = 0;
2599 w->wd = inotify_add_watch (fs_fd, path, mask);
2600 }
2601 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2602 }
2603 }
2604
2605 if (w->wd >= 0)
2606 {
2607 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2608
2609 /* now local changes will be tracked by inotify, but remote changes won't */
2610 /* unless the filesystem it known to be local, we therefore still poll */
2611 /* also do poll on <2.6.25, but with normal frequency */
2612 struct statfs sfs;
2613
2614 if (fs_2625 && !statfs (w->path, &sfs))
2615 if (sfs.f_type == 0x1373 /* devfs */
2616 || sfs.f_type == 0xEF53 /* ext2/3 */
2617 || sfs.f_type == 0x3153464a /* jfs */
2618 || sfs.f_type == 0x52654973 /* reiser3 */
2619 || sfs.f_type == 0x01021994 /* tempfs */
2620 || sfs.f_type == 0x58465342 /* xfs */)
2621 return;
2622
2623 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2624 ev_timer_again (EV_A_ &w->timer);
2625 }
2626}
2627
2628static void noinline
2629infy_del (EV_P_ ev_stat *w)
2630{
2631 int slot;
2632 int wd = w->wd;
2633
2634 if (wd < 0)
2635 return;
2636
2637 w->wd = -2;
2638 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2639 wlist_del (&fs_hash [slot].head, (WL)w);
2640
2641 /* remove this watcher, if others are watching it, they will rearm */
2642 inotify_rm_watch (fs_fd, wd);
2643}
2644
2645static void noinline
2646infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2647{
2648 if (slot < 0)
2649 /* overflow, need to check for all hash slots */
2650 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2651 infy_wd (EV_A_ slot, wd, ev);
2652 else
2653 {
2654 WL w_;
2655
2656 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2657 {
2658 ev_stat *w = (ev_stat *)w_;
2659 w_ = w_->next; /* lets us remove this watcher and all before it */
2660
2661 if (w->wd == wd || wd == -1)
2662 {
2663 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2664 {
2665 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2666 w->wd = -1;
2667 infy_add (EV_A_ w); /* re-add, no matter what */
2668 }
2669
2670 stat_timer_cb (EV_A_ &w->timer, 0);
2671 }
2672 }
2673 }
2674}
2675
2676static void
2677infy_cb (EV_P_ ev_io *w, int revents)
2678{
2679 char buf [EV_INOTIFY_BUFSIZE];
2680 struct inotify_event *ev = (struct inotify_event *)buf;
2681 int ofs;
2682 int len = read (fs_fd, buf, sizeof (buf));
2683
2684 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2685 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2686}
2687
2688inline_size void
2689check_2625 (EV_P)
2690{
2691 /* kernels < 2.6.25 are borked
2692 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2693 */
2694 struct utsname buf;
2695 int major, minor, micro;
2696
2697 if (uname (&buf))
2698 return;
2699
2700 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2701 return;
2702
2703 if (major < 2
2704 || (major == 2 && minor < 6)
2705 || (major == 2 && minor == 6 && micro < 25))
2706 return;
2707
2708 fs_2625 = 1;
2709}
2710
2711inline_size void
2712infy_init (EV_P)
2713{
2714 if (fs_fd != -2)
2715 return;
2716
2717 fs_fd = -1;
2718
2719 check_2625 (EV_A);
2720
2721 fs_fd = inotify_init ();
2722
2723 if (fs_fd >= 0)
2724 {
2725 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2726 ev_set_priority (&fs_w, EV_MAXPRI);
2727 ev_io_start (EV_A_ &fs_w);
2728 }
2729}
2730
2731inline_size void
2732infy_fork (EV_P)
2733{
2734 int slot;
2735
2736 if (fs_fd < 0)
2737 return;
2738
2739 close (fs_fd);
2740 fs_fd = inotify_init ();
2741
2742 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2743 {
2744 WL w_ = fs_hash [slot].head;
2745 fs_hash [slot].head = 0;
2746
2747 while (w_)
2748 {
2749 ev_stat *w = (ev_stat *)w_;
2750 w_ = w_->next; /* lets us add this watcher */
2751
2752 w->wd = -1;
2753
2754 if (fs_fd >= 0)
2755 infy_add (EV_A_ w); /* re-add, no matter what */
2756 else
2757 ev_timer_again (EV_A_ &w->timer);
2758 }
2759 }
2760}
2761
2762#endif
2763
2764#ifdef _WIN32
2765# define EV_LSTAT(p,b) _stati64 (p, b)
2766#else
2767# define EV_LSTAT(p,b) lstat (p, b)
2768#endif
2769
2770void
2771ev_stat_stat (EV_P_ ev_stat *w)
2772{
2773 if (lstat (w->path, &w->attr) < 0)
2774 w->attr.st_nlink = 0;
2775 else if (!w->attr.st_nlink)
2776 w->attr.st_nlink = 1;
2777}
2778
2779static void noinline
2780stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2781{
2782 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2783
2784 /* we copy this here each the time so that */
2785 /* prev has the old value when the callback gets invoked */
2786 w->prev = w->attr;
2787 ev_stat_stat (EV_A_ w);
2788
2789 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2790 if (
2791 w->prev.st_dev != w->attr.st_dev
2792 || w->prev.st_ino != w->attr.st_ino
2793 || w->prev.st_mode != w->attr.st_mode
2794 || w->prev.st_nlink != w->attr.st_nlink
2795 || w->prev.st_uid != w->attr.st_uid
2796 || w->prev.st_gid != w->attr.st_gid
2797 || w->prev.st_rdev != w->attr.st_rdev
2798 || w->prev.st_size != w->attr.st_size
2799 || w->prev.st_atime != w->attr.st_atime
2800 || w->prev.st_mtime != w->attr.st_mtime
2801 || w->prev.st_ctime != w->attr.st_ctime
2802 ) {
2803 #if EV_USE_INOTIFY
2804 if (fs_fd >= 0)
2805 {
2806 infy_del (EV_A_ w);
2807 infy_add (EV_A_ w);
2808 ev_stat_stat (EV_A_ w); /* avoid race... */
2809 }
2810 #endif
2811
2812 ev_feed_event (EV_A_ w, EV_STAT);
2813 }
2814}
2815
2816void
2817ev_stat_start (EV_P_ ev_stat *w)
2818{
2819 if (expect_false (ev_is_active (w)))
2820 return;
2821
2822 ev_stat_stat (EV_A_ w);
2823
2824 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2825 w->interval = MIN_STAT_INTERVAL;
2826
2827 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2828 ev_set_priority (&w->timer, ev_priority (w));
2829
2830#if EV_USE_INOTIFY
2831 infy_init (EV_A);
2832
2833 if (fs_fd >= 0)
2834 infy_add (EV_A_ w);
2835 else
2836#endif
2837 ev_timer_again (EV_A_ &w->timer);
2838
2839 ev_start (EV_A_ (W)w, 1);
2840
2841 EV_FREQUENT_CHECK;
2842}
2843
2844void
2845ev_stat_stop (EV_P_ ev_stat *w)
2846{
2847 clear_pending (EV_A_ (W)w);
2848 if (expect_false (!ev_is_active (w)))
2849 return;
2850
2851 EV_FREQUENT_CHECK;
2852
2853#if EV_USE_INOTIFY
2854 infy_del (EV_A_ w);
2855#endif
2856 ev_timer_stop (EV_A_ &w->timer);
2857
2858 ev_stop (EV_A_ (W)w);
2859
2860 EV_FREQUENT_CHECK;
2861}
2862#endif
2863
2864#if EV_IDLE_ENABLE
2865void
2866ev_idle_start (EV_P_ ev_idle *w)
2867{
2868 if (expect_false (ev_is_active (w)))
2869 return;
2870
2871 pri_adjust (EV_A_ (W)w);
2872
2873 EV_FREQUENT_CHECK;
2874
2875 {
2876 int active = ++idlecnt [ABSPRI (w)];
2877
2878 ++idleall;
2879 ev_start (EV_A_ (W)w, active);
2880
2881 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2882 idles [ABSPRI (w)][active - 1] = w;
2883 }
2884
2885 EV_FREQUENT_CHECK;
2886}
2887
2888void
2889ev_idle_stop (EV_P_ ev_idle *w)
2890{
2891 clear_pending (EV_A_ (W)w);
2892 if (expect_false (!ev_is_active (w)))
2893 return;
2894
2895 EV_FREQUENT_CHECK;
2896
2897 {
2898 int active = ev_active (w);
2899
2900 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2901 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2902
2903 ev_stop (EV_A_ (W)w);
2904 --idleall;
2905 }
2906
2907 EV_FREQUENT_CHECK;
2908}
2909#endif
2910
2911void
2912ev_prepare_start (EV_P_ ev_prepare *w)
2913{
2914 if (expect_false (ev_is_active (w)))
2915 return;
2916
2917 EV_FREQUENT_CHECK;
2918
2919 ev_start (EV_A_ (W)w, ++preparecnt);
2920 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2921 prepares [preparecnt - 1] = w;
2922
2923 EV_FREQUENT_CHECK;
2924}
2925
2926void
2927ev_prepare_stop (EV_P_ ev_prepare *w)
2928{
2929 clear_pending (EV_A_ (W)w);
2930 if (expect_false (!ev_is_active (w)))
2931 return;
2932
2933 EV_FREQUENT_CHECK;
2934
2935 {
2936 int active = ev_active (w);
2937
2938 prepares [active - 1] = prepares [--preparecnt];
2939 ev_active (prepares [active - 1]) = active;
2940 }
2941
2942 ev_stop (EV_A_ (W)w);
2943
2944 EV_FREQUENT_CHECK;
2945}
2946
2947void
2948ev_check_start (EV_P_ ev_check *w)
2949{
2950 if (expect_false (ev_is_active (w)))
2951 return;
2952
2953 EV_FREQUENT_CHECK;
2954
2955 ev_start (EV_A_ (W)w, ++checkcnt);
711 array_needsize (checks, checkmax, checkcnt, ); 2956 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
712 checks [checkcnt - 1] = w; 2957 checks [checkcnt - 1] = w;
713}
714 2958
2959 EV_FREQUENT_CHECK;
2960}
2961
2962void
715void evcheck_stop (struct ev_check *w) 2963ev_check_stop (EV_P_ ev_check *w)
716{ 2964{
2965 clear_pending (EV_A_ (W)w);
2966 if (expect_false (!ev_is_active (w)))
2967 return;
2968
2969 EV_FREQUENT_CHECK;
2970
2971 {
2972 int active = ev_active (w);
2973
717 checks [w->active - 1] = checks [--checkcnt]; 2974 checks [active - 1] = checks [--checkcnt];
718 ev_stop ((struct ev_watcher *)w); 2975 ev_active (checks [active - 1]) = active;
2976 }
2977
2978 ev_stop (EV_A_ (W)w);
2979
2980 EV_FREQUENT_CHECK;
719} 2981}
2982
2983#if EV_EMBED_ENABLE
2984void noinline
2985ev_embed_sweep (EV_P_ ev_embed *w)
2986{
2987 ev_loop (w->other, EVLOOP_NONBLOCK);
2988}
2989
2990static void
2991embed_io_cb (EV_P_ ev_io *io, int revents)
2992{
2993 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2994
2995 if (ev_cb (w))
2996 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2997 else
2998 ev_loop (w->other, EVLOOP_NONBLOCK);
2999}
3000
3001static void
3002embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3003{
3004 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3005
3006 {
3007 struct ev_loop *loop = w->other;
3008
3009 while (fdchangecnt)
3010 {
3011 fd_reify (EV_A);
3012 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3013 }
3014 }
3015}
3016
3017static void
3018embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3019{
3020 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3021
3022 ev_embed_stop (EV_A_ w);
3023
3024 {
3025 struct ev_loop *loop = w->other;
3026
3027 ev_loop_fork (EV_A);
3028 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3029 }
3030
3031 ev_embed_start (EV_A_ w);
3032}
3033
3034#if 0
3035static void
3036embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3037{
3038 ev_idle_stop (EV_A_ idle);
3039}
3040#endif
3041
3042void
3043ev_embed_start (EV_P_ ev_embed *w)
3044{
3045 if (expect_false (ev_is_active (w)))
3046 return;
3047
3048 {
3049 struct ev_loop *loop = w->other;
3050 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3051 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3052 }
3053
3054 EV_FREQUENT_CHECK;
3055
3056 ev_set_priority (&w->io, ev_priority (w));
3057 ev_io_start (EV_A_ &w->io);
3058
3059 ev_prepare_init (&w->prepare, embed_prepare_cb);
3060 ev_set_priority (&w->prepare, EV_MINPRI);
3061 ev_prepare_start (EV_A_ &w->prepare);
3062
3063 ev_fork_init (&w->fork, embed_fork_cb);
3064 ev_fork_start (EV_A_ &w->fork);
3065
3066 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3067
3068 ev_start (EV_A_ (W)w, 1);
3069
3070 EV_FREQUENT_CHECK;
3071}
3072
3073void
3074ev_embed_stop (EV_P_ ev_embed *w)
3075{
3076 clear_pending (EV_A_ (W)w);
3077 if (expect_false (!ev_is_active (w)))
3078 return;
3079
3080 EV_FREQUENT_CHECK;
3081
3082 ev_io_stop (EV_A_ &w->io);
3083 ev_prepare_stop (EV_A_ &w->prepare);
3084 ev_fork_stop (EV_A_ &w->fork);
3085
3086 EV_FREQUENT_CHECK;
3087}
3088#endif
3089
3090#if EV_FORK_ENABLE
3091void
3092ev_fork_start (EV_P_ ev_fork *w)
3093{
3094 if (expect_false (ev_is_active (w)))
3095 return;
3096
3097 EV_FREQUENT_CHECK;
3098
3099 ev_start (EV_A_ (W)w, ++forkcnt);
3100 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3101 forks [forkcnt - 1] = w;
3102
3103 EV_FREQUENT_CHECK;
3104}
3105
3106void
3107ev_fork_stop (EV_P_ ev_fork *w)
3108{
3109 clear_pending (EV_A_ (W)w);
3110 if (expect_false (!ev_is_active (w)))
3111 return;
3112
3113 EV_FREQUENT_CHECK;
3114
3115 {
3116 int active = ev_active (w);
3117
3118 forks [active - 1] = forks [--forkcnt];
3119 ev_active (forks [active - 1]) = active;
3120 }
3121
3122 ev_stop (EV_A_ (W)w);
3123
3124 EV_FREQUENT_CHECK;
3125}
3126#endif
3127
3128#if EV_ASYNC_ENABLE
3129void
3130ev_async_start (EV_P_ ev_async *w)
3131{
3132 if (expect_false (ev_is_active (w)))
3133 return;
3134
3135 evpipe_init (EV_A);
3136
3137 EV_FREQUENT_CHECK;
3138
3139 ev_start (EV_A_ (W)w, ++asynccnt);
3140 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3141 asyncs [asynccnt - 1] = w;
3142
3143 EV_FREQUENT_CHECK;
3144}
3145
3146void
3147ev_async_stop (EV_P_ ev_async *w)
3148{
3149 clear_pending (EV_A_ (W)w);
3150 if (expect_false (!ev_is_active (w)))
3151 return;
3152
3153 EV_FREQUENT_CHECK;
3154
3155 {
3156 int active = ev_active (w);
3157
3158 asyncs [active - 1] = asyncs [--asynccnt];
3159 ev_active (asyncs [active - 1]) = active;
3160 }
3161
3162 ev_stop (EV_A_ (W)w);
3163
3164 EV_FREQUENT_CHECK;
3165}
3166
3167void
3168ev_async_send (EV_P_ ev_async *w)
3169{
3170 w->sent = 1;
3171 evpipe_write (EV_A_ &gotasync);
3172}
3173#endif
720 3174
721/*****************************************************************************/ 3175/*****************************************************************************/
722#if 1 3176
3177struct ev_once
3178{
3179 ev_io io;
3180 ev_timer to;
3181 void (*cb)(int revents, void *arg);
3182 void *arg;
3183};
723 3184
724static void 3185static void
725sin_cb (struct ev_io *w, int revents) 3186once_cb (EV_P_ struct ev_once *once, int revents)
726{ 3187{
727 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 3188 void (*cb)(int revents, void *arg) = once->cb;
3189 void *arg = once->arg;
3190
3191 ev_io_stop (EV_A_ &once->io);
3192 ev_timer_stop (EV_A_ &once->to);
3193 ev_free (once);
3194
3195 cb (revents, arg);
728} 3196}
729 3197
730static void 3198static void
731ocb (struct ev_timer *w, int revents) 3199once_cb_io (EV_P_ ev_io *w, int revents)
732{ 3200{
733 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 3201 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
734 evtimer_stop (w); 3202
735 evtimer_start (w); 3203 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
736} 3204}
737 3205
738static void 3206static void
739scb (struct ev_signal *w, int revents) 3207once_cb_to (EV_P_ ev_timer *w, int revents)
740{ 3208{
741 fprintf (stderr, "signal %x,%d\n", revents, w->signum); 3209 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
742}
743 3210
744static void 3211 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
745gcb (struct ev_signal *w, int revents)
746{
747 fprintf (stderr, "generic %x\n", revents);
748} 3212}
749 3213
750int main (void) 3214void
3215ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
751{ 3216{
752 struct ev_io sin; 3217 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
753 3218
754 ev_init (0); 3219 if (expect_false (!once))
3220 {
3221 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
3222 return;
3223 }
755 3224
756 evw_init (&sin, sin_cb, 55); 3225 once->cb = cb;
757 evio_set (&sin, 0, EV_READ); 3226 once->arg = arg;
758 evio_start (&sin);
759 3227
760 struct ev_timer t[10000]; 3228 ev_init (&once->io, once_cb_io);
3229 if (fd >= 0)
3230 {
3231 ev_io_set (&once->io, fd, events);
3232 ev_io_start (EV_A_ &once->io);
3233 }
761 3234
762#if 0 3235 ev_init (&once->to, once_cb_to);
3236 if (timeout >= 0.)
3237 {
3238 ev_timer_set (&once->to, timeout, 0.);
3239 ev_timer_start (EV_A_ &once->to);
3240 }
3241}
3242
3243/*****************************************************************************/
3244
3245#if EV_WALK_ENABLE
3246void
3247ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3248{
763 int i; 3249 int i, j;
3250 ev_watcher_list *wl, *wn;
3251
3252 if (types & (EV_IO | EV_EMBED))
764 for (i = 0; i < 10000; ++i) 3253 for (i = 0; i < anfdmax; ++i)
765 { 3254 for (wl = anfds [i].head; wl; )
766 struct ev_timer *w = t + i; 3255 {
767 evw_init (w, ocb, i); 3256 wn = wl->next;
768 evtimer_set_abs (w, drand48 (), 0.99775533);
769 evtimer_start (w);
770 if (drand48 () < 0.5)
771 evtimer_stop (w);
772 }
773#endif
774 3257
775 struct ev_timer t1; 3258#if EV_EMBED_ENABLE
776 evw_init (&t1, ocb, 0); 3259 if (ev_cb ((ev_io *)wl) == embed_io_cb)
777 evtimer_set_abs (&t1, 5, 10); 3260 {
778 evtimer_start (&t1); 3261 if (types & EV_EMBED)
779 3262 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
780 struct ev_signal sig; 3263 }
781 evw_init (&sig, scb, 65535); 3264 else
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;
796}
797
798#endif 3265#endif
3266#if EV_USE_INOTIFY
3267 if (ev_cb ((ev_io *)wl) == infy_cb)
3268 ;
3269 else
3270#endif
3271 if ((ev_io *)wl != &pipe_w)
3272 if (types & EV_IO)
3273 cb (EV_A_ EV_IO, wl);
799 3274
3275 wl = wn;
3276 }
800 3277
3278 if (types & (EV_TIMER | EV_STAT))
3279 for (i = timercnt + HEAP0; i-- > HEAP0; )
3280#if EV_STAT_ENABLE
3281 /*TODO: timer is not always active*/
3282 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3283 {
3284 if (types & EV_STAT)
3285 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3286 }
3287 else
3288#endif
3289 if (types & EV_TIMER)
3290 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
801 3291
3292#if EV_PERIODIC_ENABLE
3293 if (types & EV_PERIODIC)
3294 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3295 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3296#endif
802 3297
3298#if EV_IDLE_ENABLE
3299 if (types & EV_IDLE)
3300 for (j = NUMPRI; i--; )
3301 for (i = idlecnt [j]; i--; )
3302 cb (EV_A_ EV_IDLE, idles [j][i]);
3303#endif
3304
3305#if EV_FORK_ENABLE
3306 if (types & EV_FORK)
3307 for (i = forkcnt; i--; )
3308 if (ev_cb (forks [i]) != embed_fork_cb)
3309 cb (EV_A_ EV_FORK, forks [i]);
3310#endif
3311
3312#if EV_ASYNC_ENABLE
3313 if (types & EV_ASYNC)
3314 for (i = asynccnt; i--; )
3315 cb (EV_A_ EV_ASYNC, asyncs [i]);
3316#endif
3317
3318 if (types & EV_PREPARE)
3319 for (i = preparecnt; i--; )
3320#if EV_EMBED_ENABLE
3321 if (ev_cb (prepares [i]) != embed_prepare_cb)
3322#endif
3323 cb (EV_A_ EV_PREPARE, prepares [i]);
3324
3325 if (types & EV_CHECK)
3326 for (i = checkcnt; i--; )
3327 cb (EV_A_ EV_CHECK, checks [i]);
3328
3329 if (types & EV_SIGNAL)
3330 for (i = 0; i < signalmax; ++i)
3331 for (wl = signals [i].head; wl; )
3332 {
3333 wn = wl->next;
3334 cb (EV_A_ EV_SIGNAL, wl);
3335 wl = wn;
3336 }
3337
3338 if (types & EV_CHILD)
3339 for (i = EV_PID_HASHSIZE; i--; )
3340 for (wl = childs [i]; wl; )
3341 {
3342 wn = wl->next;
3343 cb (EV_A_ EV_CHILD, wl);
3344 wl = wn;
3345 }
3346/* EV_STAT 0x00001000 /* stat data changed */
3347/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3348}
3349#endif
3350
3351#if EV_MULTIPLICITY
3352 #include "ev_wrap.h"
3353#endif
3354
3355#ifdef __cplusplus
3356}
3357#endif
3358

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