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Comparing libev/ev.c (file contents):
Revision 1.13 by root, Wed Oct 31 10:50:05 2007 UTC vs.
Revision 1.294 by root, Wed Jul 8 02:46:05 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# elif !defined(EV_USE_CLOCK_SYSCALL)
63# define EV_USE_CLOCK_SYSCALL 0
64# endif
65
66# if HAVE_CLOCK_GETTIME
67# ifndef EV_USE_MONOTONIC
68# define EV_USE_MONOTONIC 1
69# endif
70# ifndef EV_USE_REALTIME
71# define EV_USE_REALTIME 0
72# endif
73# else
74# ifndef EV_USE_MONOTONIC
75# define EV_USE_MONOTONIC 0
76# endif
77# ifndef EV_USE_REALTIME
78# define EV_USE_REALTIME 0
79# endif
80# endif
81
82# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
84# define EV_USE_NANOSLEEP 1
85# else
86# define EV_USE_NANOSLEEP 0
87# endif
88# endif
89
90# ifndef EV_USE_SELECT
91# if HAVE_SELECT && HAVE_SYS_SELECT_H
92# define EV_USE_SELECT 1
93# else
94# define EV_USE_SELECT 0
95# endif
96# endif
97
98# ifndef EV_USE_POLL
99# if HAVE_POLL && HAVE_POLL_H
100# define EV_USE_POLL 1
101# else
102# define EV_USE_POLL 0
103# endif
104# endif
105
106# ifndef EV_USE_EPOLL
107# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
108# define EV_USE_EPOLL 1
109# else
110# define EV_USE_EPOLL 0
111# endif
112# endif
113
114# ifndef EV_USE_KQUEUE
115# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
116# define EV_USE_KQUEUE 1
117# else
118# define EV_USE_KQUEUE 0
119# endif
120# endif
121
122# ifndef EV_USE_PORT
123# if HAVE_PORT_H && HAVE_PORT_CREATE
124# define EV_USE_PORT 1
125# else
126# define EV_USE_PORT 0
127# endif
128# endif
129
130# ifndef EV_USE_INOTIFY
131# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
132# define EV_USE_INOTIFY 1
133# else
134# define EV_USE_INOTIFY 0
135# endif
136# endif
137
138# ifndef EV_USE_EVENTFD
139# if HAVE_EVENTFD
140# define EV_USE_EVENTFD 1
141# else
142# define EV_USE_EVENTFD 0
143# endif
144# endif
145
146#endif
147
1#include <math.h> 148#include <math.h>
2#include <stdlib.h> 149#include <stdlib.h>
3#include <unistd.h>
4#include <fcntl.h> 150#include <fcntl.h>
5#include <signal.h> 151#include <stddef.h>
6 152
7#include <stdio.h> 153#include <stdio.h>
8 154
9#include <assert.h> 155#include <assert.h>
10#include <errno.h> 156#include <errno.h>
11#include <sys/time.h> 157#include <sys/types.h>
12#include <time.h> 158#include <time.h>
13 159
14#define HAVE_EPOLL 1 160#include <signal.h>
15 161
16#ifndef HAVE_MONOTONIC 162#ifdef EV_H
17# ifdef CLOCK_MONOTONIC 163# include EV_H
18# define HAVE_MONOTONIC 1 164#else
165# include "ev.h"
166#endif
167
168#ifndef _WIN32
169# include <sys/time.h>
170# include <sys/wait.h>
171# include <unistd.h>
172#else
173# include <io.h>
174# define WIN32_LEAN_AND_MEAN
175# include <windows.h>
176# ifndef EV_SELECT_IS_WINSOCKET
177# define EV_SELECT_IS_WINSOCKET 1
19# endif 178# endif
20#endif 179#endif
21 180
22#ifndef HAVE_SELECT 181/* this block tries to deduce configuration from header-defined symbols and defaults */
23# define HAVE_SELECT 1 182
183#ifndef EV_USE_CLOCK_SYSCALL
184# if __linux && __GLIBC__ >= 2
185# define EV_USE_CLOCK_SYSCALL 1
186# else
187# define EV_USE_CLOCK_SYSCALL 0
24#endif 188# endif
189#endif
25 190
26#ifndef HAVE_EPOLL 191#ifndef EV_USE_MONOTONIC
27# define HAVE_EPOLL 0 192# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
193# define EV_USE_MONOTONIC 1
194# else
195# define EV_USE_MONOTONIC 0
28#endif 196# endif
197#endif
29 198
30#ifndef HAVE_REALTIME 199#ifndef EV_USE_REALTIME
31# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ 200# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
201#endif
202
203#ifndef EV_USE_NANOSLEEP
204# if _POSIX_C_SOURCE >= 199309L
205# define EV_USE_NANOSLEEP 1
206# else
207# define EV_USE_NANOSLEEP 0
32#endif 208# endif
209#endif
210
211#ifndef EV_USE_SELECT
212# define EV_USE_SELECT 1
213#endif
214
215#ifndef EV_USE_POLL
216# ifdef _WIN32
217# define EV_USE_POLL 0
218# else
219# define EV_USE_POLL 1
220# endif
221#endif
222
223#ifndef EV_USE_EPOLL
224# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
225# define EV_USE_EPOLL 1
226# else
227# define EV_USE_EPOLL 0
228# endif
229#endif
230
231#ifndef EV_USE_KQUEUE
232# define EV_USE_KQUEUE 0
233#endif
234
235#ifndef EV_USE_PORT
236# define EV_USE_PORT 0
237#endif
238
239#ifndef EV_USE_INOTIFY
240# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
241# define EV_USE_INOTIFY 1
242# else
243# define EV_USE_INOTIFY 0
244# endif
245#endif
246
247#ifndef EV_PID_HASHSIZE
248# if EV_MINIMAL
249# define EV_PID_HASHSIZE 1
250# else
251# define EV_PID_HASHSIZE 16
252# endif
253#endif
254
255#ifndef EV_INOTIFY_HASHSIZE
256# if EV_MINIMAL
257# define EV_INOTIFY_HASHSIZE 1
258# else
259# define EV_INOTIFY_HASHSIZE 16
260# endif
261#endif
262
263#ifndef EV_USE_EVENTFD
264# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
265# define EV_USE_EVENTFD 1
266# else
267# define EV_USE_EVENTFD 0
268# endif
269#endif
270
271#if 0 /* debugging */
272# define EV_VERIFY 3
273# define EV_USE_4HEAP 1
274# define EV_HEAP_CACHE_AT 1
275#endif
276
277#ifndef EV_VERIFY
278# define EV_VERIFY !EV_MINIMAL
279#endif
280
281#ifndef EV_USE_4HEAP
282# define EV_USE_4HEAP !EV_MINIMAL
283#endif
284
285#ifndef EV_HEAP_CACHE_AT
286# define EV_HEAP_CACHE_AT !EV_MINIMAL
287#endif
288
289/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
290/* which makes programs even slower. might work on other unices, too. */
291#if EV_USE_CLOCK_SYSCALL
292# include <syscall.h>
293# ifdef SYS_clock_gettime
294# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
295# undef EV_USE_MONOTONIC
296# define EV_USE_MONOTONIC 1
297# else
298# undef EV_USE_CLOCK_SYSCALL
299# define EV_USE_CLOCK_SYSCALL 0
300# endif
301#endif
302
303/* this block fixes any misconfiguration where we know we run into trouble otherwise */
304
305#ifndef CLOCK_MONOTONIC
306# undef EV_USE_MONOTONIC
307# define EV_USE_MONOTONIC 0
308#endif
309
310#ifndef CLOCK_REALTIME
311# undef EV_USE_REALTIME
312# define EV_USE_REALTIME 0
313#endif
314
315#if !EV_STAT_ENABLE
316# undef EV_USE_INOTIFY
317# define EV_USE_INOTIFY 0
318#endif
319
320#if !EV_USE_NANOSLEEP
321# ifndef _WIN32
322# include <sys/select.h>
323# endif
324#endif
325
326#if EV_USE_INOTIFY
327# include <sys/utsname.h>
328# include <sys/statfs.h>
329# include <sys/inotify.h>
330/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
331# ifndef IN_DONT_FOLLOW
332# undef EV_USE_INOTIFY
333# define EV_USE_INOTIFY 0
334# endif
335#endif
336
337#if EV_SELECT_IS_WINSOCKET
338# include <winsock.h>
339#endif
340
341#if EV_USE_EVENTFD
342/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
343# include <stdint.h>
344# ifdef __cplusplus
345extern "C" {
346# endif
347int eventfd (unsigned int initval, int flags);
348# ifdef __cplusplus
349}
350# endif
351#endif
352
353/**/
354
355#if EV_VERIFY >= 3
356# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
357#else
358# define EV_FREQUENT_CHECK do { } while (0)
359#endif
360
361/*
362 * This is used to avoid floating point rounding problems.
363 * It is added to ev_rt_now when scheduling periodics
364 * to ensure progress, time-wise, even when rounding
365 * errors are against us.
366 * This value is good at least till the year 4000.
367 * Better solutions welcome.
368 */
369#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
33 370
34#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 371#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
35#define MAX_BLOCKTIME 60. 372#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
373/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
36 374
37#include "ev.h" 375#if __GNUC__ >= 4
376# define expect(expr,value) __builtin_expect ((expr),(value))
377# define noinline __attribute__ ((noinline))
378#else
379# define expect(expr,value) (expr)
380# define noinline
381# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
382# define inline
383# endif
384#endif
38 385
386#define expect_false(expr) expect ((expr) != 0, 0)
387#define expect_true(expr) expect ((expr) != 0, 1)
388#define inline_size static inline
389
390#if EV_MINIMAL
391# define inline_speed static noinline
392#else
393# define inline_speed static inline
394#endif
395
396#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
397#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
398
399#define EMPTY /* required for microsofts broken pseudo-c compiler */
400#define EMPTY2(a,b) /* used to suppress some warnings */
401
39typedef struct ev_watcher *W; 402typedef ev_watcher *W;
40typedef struct ev_watcher_list *WL; 403typedef ev_watcher_list *WL;
41typedef struct ev_watcher_time *WT; 404typedef ev_watcher_time *WT;
42 405
43static ev_tstamp now, diff; /* monotonic clock */ 406#define ev_active(w) ((W)(w))->active
44ev_tstamp ev_now; 407#define ev_at(w) ((WT)(w))->at
45int ev_method;
46 408
47static int have_monotonic; /* runtime */ 409#if EV_USE_REALTIME
410/* sig_atomic_t is used to avoid per-thread variables or locking but still */
411/* giving it a reasonably high chance of working on typical architetcures */
412static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
413#endif
48 414
49static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 415#if EV_USE_MONOTONIC
50static void (*method_modify)(int fd, int oev, int nev); 416static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
51static void (*method_poll)(ev_tstamp timeout); 417#endif
418
419#ifdef _WIN32
420# include "ev_win32.c"
421#endif
52 422
53/*****************************************************************************/ 423/*****************************************************************************/
54 424
425static void (*syserr_cb)(const char *msg);
426
427void
428ev_set_syserr_cb (void (*cb)(const char *msg))
429{
430 syserr_cb = cb;
431}
432
433static void noinline
434ev_syserr (const char *msg)
435{
436 if (!msg)
437 msg = "(libev) system error";
438
439 if (syserr_cb)
440 syserr_cb (msg);
441 else
442 {
443 perror (msg);
444 abort ();
445 }
446}
447
448static void *
449ev_realloc_emul (void *ptr, long size)
450{
451 /* some systems, notably openbsd and darwin, fail to properly
452 * implement realloc (x, 0) (as required by both ansi c-98 and
453 * the single unix specification, so work around them here.
454 */
455
456 if (size)
457 return realloc (ptr, size);
458
459 free (ptr);
460 return 0;
461}
462
463static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
464
465void
466ev_set_allocator (void *(*cb)(void *ptr, long size))
467{
468 alloc = cb;
469}
470
471inline_speed void *
472ev_realloc (void *ptr, long size)
473{
474 ptr = alloc (ptr, size);
475
476 if (!ptr && size)
477 {
478 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
479 abort ();
480 }
481
482 return ptr;
483}
484
485#define ev_malloc(size) ev_realloc (0, (size))
486#define ev_free(ptr) ev_realloc ((ptr), 0)
487
488/*****************************************************************************/
489
490/* file descriptor info structure */
491typedef struct
492{
493 WL head;
494 unsigned char events; /* the events watched for */
495 unsigned char reify; /* flag set when this ANFD needs reification */
496 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
497 unsigned char unused;
498#if EV_USE_EPOLL
499 unsigned int egen; /* generation counter to counter epoll bugs */
500#endif
501#if EV_SELECT_IS_WINSOCKET
502 SOCKET handle;
503#endif
504} ANFD;
505
506/* stores the pending event set for a given watcher */
507typedef struct
508{
509 W w;
510 int events; /* the pending event set for the given watcher */
511} ANPENDING;
512
513#if EV_USE_INOTIFY
514/* hash table entry per inotify-id */
515typedef struct
516{
517 WL head;
518} ANFS;
519#endif
520
521/* Heap Entry */
522#if EV_HEAP_CACHE_AT
523 /* a heap element */
524 typedef struct {
525 ev_tstamp at;
526 WT w;
527 } ANHE;
528
529 #define ANHE_w(he) (he).w /* access watcher, read-write */
530 #define ANHE_at(he) (he).at /* access cached at, read-only */
531 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
532#else
533 /* a heap element */
534 typedef WT ANHE;
535
536 #define ANHE_w(he) (he)
537 #define ANHE_at(he) (he)->at
538 #define ANHE_at_cache(he)
539#endif
540
541#if EV_MULTIPLICITY
542
543 struct ev_loop
544 {
545 ev_tstamp ev_rt_now;
546 #define ev_rt_now ((loop)->ev_rt_now)
547 #define VAR(name,decl) decl;
548 #include "ev_vars.h"
549 #undef VAR
550 };
551 #include "ev_wrap.h"
552
553 static struct ev_loop default_loop_struct;
554 struct ev_loop *ev_default_loop_ptr;
555
556#else
557
558 ev_tstamp ev_rt_now;
559 #define VAR(name,decl) static decl;
560 #include "ev_vars.h"
561 #undef VAR
562
563 static int ev_default_loop_ptr;
564
565#endif
566
567/*****************************************************************************/
568
569#ifndef EV_HAVE_EV_TIME
55ev_tstamp 570ev_tstamp
56ev_time (void) 571ev_time (void)
57{ 572{
58#if HAVE_REALTIME 573#if EV_USE_REALTIME
574 if (expect_true (have_realtime))
575 {
59 struct timespec ts; 576 struct timespec ts;
60 clock_gettime (CLOCK_REALTIME, &ts); 577 clock_gettime (CLOCK_REALTIME, &ts);
61 return ts.tv_sec + ts.tv_nsec * 1e-9; 578 return ts.tv_sec + ts.tv_nsec * 1e-9;
62#else 579 }
580#endif
581
63 struct timeval tv; 582 struct timeval tv;
64 gettimeofday (&tv, 0); 583 gettimeofday (&tv, 0);
65 return tv.tv_sec + tv.tv_usec * 1e-6; 584 return tv.tv_sec + tv.tv_usec * 1e-6;
66#endif
67} 585}
586#endif
68 587
69static ev_tstamp 588inline_size ev_tstamp
70get_clock (void) 589get_clock (void)
71{ 590{
72#if HAVE_MONOTONIC 591#if EV_USE_MONOTONIC
73 if (have_monotonic) 592 if (expect_true (have_monotonic))
74 { 593 {
75 struct timespec ts; 594 struct timespec ts;
76 clock_gettime (CLOCK_MONOTONIC, &ts); 595 clock_gettime (CLOCK_MONOTONIC, &ts);
77 return ts.tv_sec + ts.tv_nsec * 1e-9; 596 return ts.tv_sec + ts.tv_nsec * 1e-9;
78 } 597 }
79#endif 598#endif
80 599
81 return ev_time (); 600 return ev_time ();
82} 601}
83 602
84#define array_needsize(base,cur,cnt,init) \ 603#if EV_MULTIPLICITY
85 if ((cnt) > cur) \ 604ev_tstamp
86 { \ 605ev_now (EV_P)
87 int newcnt = cur ? cur << 1 : 16; \ 606{
88 fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\ 607 return ev_rt_now;
89 base = realloc (base, sizeof (*base) * (newcnt)); \ 608}
90 init (base + cur, newcnt - cur); \ 609#endif
91 cur = newcnt; \ 610
611void
612ev_sleep (ev_tstamp delay)
613{
614 if (delay > 0.)
92 } 615 {
616#if EV_USE_NANOSLEEP
617 struct timespec ts;
618
619 ts.tv_sec = (time_t)delay;
620 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
621
622 nanosleep (&ts, 0);
623#elif defined(_WIN32)
624 Sleep ((unsigned long)(delay * 1e3));
625#else
626 struct timeval tv;
627
628 tv.tv_sec = (time_t)delay;
629 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
630
631 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
632 /* somehting not guaranteed by newer posix versions, but guaranteed */
633 /* by older ones */
634 select (0, 0, 0, 0, &tv);
635#endif
636 }
637}
93 638
94/*****************************************************************************/ 639/*****************************************************************************/
95 640
641#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
642
643/* find a suitable new size for the given array, */
644/* hopefully by rounding to a ncie-to-malloc size */
645inline_size int
646array_nextsize (int elem, int cur, int cnt)
647{
648 int ncur = cur + 1;
649
650 do
651 ncur <<= 1;
652 while (cnt > ncur);
653
654 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
655 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
656 {
657 ncur *= elem;
658 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
659 ncur = ncur - sizeof (void *) * 4;
660 ncur /= elem;
661 }
662
663 return ncur;
664}
665
666static noinline void *
667array_realloc (int elem, void *base, int *cur, int cnt)
668{
669 *cur = array_nextsize (elem, *cur, cnt);
670 return ev_realloc (base, elem * *cur);
671}
672
673#define array_init_zero(base,count) \
674 memset ((void *)(base), 0, sizeof (*(base)) * (count))
675
676#define array_needsize(type,base,cur,cnt,init) \
677 if (expect_false ((cnt) > (cur))) \
678 { \
679 int ocur_ = (cur); \
680 (base) = (type *)array_realloc \
681 (sizeof (type), (base), &(cur), (cnt)); \
682 init ((base) + (ocur_), (cur) - ocur_); \
683 }
684
685#if 0
686#define array_slim(type,stem) \
687 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
688 { \
689 stem ## max = array_roundsize (stem ## cnt >> 1); \
690 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
691 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
692 }
693#endif
694
695#define array_free(stem, idx) \
696 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
697
698/*****************************************************************************/
699
700/* dummy callback for pending events */
701static void noinline
702pendingcb (EV_P_ ev_prepare *w, int revents)
703{
704}
705
706void noinline
707ev_feed_event (EV_P_ void *w, int revents)
708{
709 W w_ = (W)w;
710 int pri = ABSPRI (w_);
711
712 if (expect_false (w_->pending))
713 pendings [pri][w_->pending - 1].events |= revents;
714 else
715 {
716 w_->pending = ++pendingcnt [pri];
717 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
718 pendings [pri][w_->pending - 1].w = w_;
719 pendings [pri][w_->pending - 1].events = revents;
720 }
721}
722
723inline_speed void
724feed_reverse (EV_P_ W w)
725{
726 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
727 rfeeds [rfeedcnt++] = w;
728}
729
730inline_size void
731feed_reverse_done (EV_P_ int revents)
732{
733 do
734 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
735 while (rfeedcnt);
736}
737
738inline_speed void
739queue_events (EV_P_ W *events, int eventcnt, int type)
740{
741 int i;
742
743 for (i = 0; i < eventcnt; ++i)
744 ev_feed_event (EV_A_ events [i], type);
745}
746
747/*****************************************************************************/
748
749inline_speed void
750fd_event (EV_P_ int fd, int revents)
751{
752 ANFD *anfd = anfds + fd;
753 ev_io *w;
754
755 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
756 {
757 int ev = w->events & revents;
758
759 if (ev)
760 ev_feed_event (EV_A_ (W)w, ev);
761 }
762}
763
764void
765ev_feed_fd_event (EV_P_ int fd, int revents)
766{
767 if (fd >= 0 && fd < anfdmax)
768 fd_event (EV_A_ fd, revents);
769}
770
771/* make sure the external fd watch events are in-sync */
772/* with the kernel/libev internal state */
773inline_size void
774fd_reify (EV_P)
775{
776 int i;
777
778 for (i = 0; i < fdchangecnt; ++i)
779 {
780 int fd = fdchanges [i];
781 ANFD *anfd = anfds + fd;
782 ev_io *w;
783
784 unsigned char events = 0;
785
786 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
787 events |= (unsigned char)w->events;
788
789#if EV_SELECT_IS_WINSOCKET
790 if (events)
791 {
792 unsigned long arg;
793 #ifdef EV_FD_TO_WIN32_HANDLE
794 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
795 #else
796 anfd->handle = _get_osfhandle (fd);
797 #endif
798 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
799 }
800#endif
801
802 {
803 unsigned char o_events = anfd->events;
804 unsigned char o_reify = anfd->reify;
805
806 anfd->reify = 0;
807 anfd->events = events;
808
809 if (o_events != events || o_reify & EV__IOFDSET)
810 backend_modify (EV_A_ fd, o_events, events);
811 }
812 }
813
814 fdchangecnt = 0;
815}
816
817/* something about the given fd changed */
818inline_size void
819fd_change (EV_P_ int fd, int flags)
820{
821 unsigned char reify = anfds [fd].reify;
822 anfds [fd].reify |= flags;
823
824 if (expect_true (!reify))
825 {
826 ++fdchangecnt;
827 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
828 fdchanges [fdchangecnt - 1] = fd;
829 }
830}
831
832/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
833inline_speed void
834fd_kill (EV_P_ int fd)
835{
836 ev_io *w;
837
838 while ((w = (ev_io *)anfds [fd].head))
839 {
840 ev_io_stop (EV_A_ w);
841 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
842 }
843}
844
845/* check whether the given fd is atcually valid, for error recovery */
846inline_size int
847fd_valid (int fd)
848{
849#ifdef _WIN32
850 return _get_osfhandle (fd) != -1;
851#else
852 return fcntl (fd, F_GETFD) != -1;
853#endif
854}
855
856/* called on EBADF to verify fds */
857static void noinline
858fd_ebadf (EV_P)
859{
860 int fd;
861
862 for (fd = 0; fd < anfdmax; ++fd)
863 if (anfds [fd].events)
864 if (!fd_valid (fd) && errno == EBADF)
865 fd_kill (EV_A_ fd);
866}
867
868/* called on ENOMEM in select/poll to kill some fds and retry */
869static void noinline
870fd_enomem (EV_P)
871{
872 int fd;
873
874 for (fd = anfdmax; fd--; )
875 if (anfds [fd].events)
876 {
877 fd_kill (EV_A_ fd);
878 return;
879 }
880}
881
882/* usually called after fork if backend needs to re-arm all fds from scratch */
883static void noinline
884fd_rearm_all (EV_P)
885{
886 int fd;
887
888 for (fd = 0; fd < anfdmax; ++fd)
889 if (anfds [fd].events)
890 {
891 anfds [fd].events = 0;
892 anfds [fd].emask = 0;
893 fd_change (EV_A_ fd, EV__IOFDSET | 1);
894 }
895}
896
897/*****************************************************************************/
898
899/*
900 * the heap functions want a real array index. array index 0 uis guaranteed to not
901 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
902 * the branching factor of the d-tree.
903 */
904
905/*
906 * at the moment we allow libev the luxury of two heaps,
907 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
908 * which is more cache-efficient.
909 * the difference is about 5% with 50000+ watchers.
910 */
911#if EV_USE_4HEAP
912
913#define DHEAP 4
914#define HEAP0 (DHEAP - 1) /* index of first element in heap */
915#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
916#define UPHEAP_DONE(p,k) ((p) == (k))
917
918/* away from the root */
919inline_speed void
920downheap (ANHE *heap, int N, int k)
921{
922 ANHE he = heap [k];
923 ANHE *E = heap + N + HEAP0;
924
925 for (;;)
926 {
927 ev_tstamp minat;
928 ANHE *minpos;
929 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
930
931 /* find minimum child */
932 if (expect_true (pos + DHEAP - 1 < E))
933 {
934 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
935 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
936 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
937 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
938 }
939 else if (pos < E)
940 {
941 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
942 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
943 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
944 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
945 }
946 else
947 break;
948
949 if (ANHE_at (he) <= minat)
950 break;
951
952 heap [k] = *minpos;
953 ev_active (ANHE_w (*minpos)) = k;
954
955 k = minpos - heap;
956 }
957
958 heap [k] = he;
959 ev_active (ANHE_w (he)) = k;
960}
961
962#else /* 4HEAP */
963
964#define HEAP0 1
965#define HPARENT(k) ((k) >> 1)
966#define UPHEAP_DONE(p,k) (!(p))
967
968/* away from the root */
969inline_speed void
970downheap (ANHE *heap, int N, int k)
971{
972 ANHE he = heap [k];
973
974 for (;;)
975 {
976 int c = k << 1;
977
978 if (c > N + HEAP0 - 1)
979 break;
980
981 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
982 ? 1 : 0;
983
984 if (ANHE_at (he) <= ANHE_at (heap [c]))
985 break;
986
987 heap [k] = heap [c];
988 ev_active (ANHE_w (heap [k])) = k;
989
990 k = c;
991 }
992
993 heap [k] = he;
994 ev_active (ANHE_w (he)) = k;
995}
996#endif
997
998/* towards the root */
999inline_speed void
1000upheap (ANHE *heap, int k)
1001{
1002 ANHE he = heap [k];
1003
1004 for (;;)
1005 {
1006 int p = HPARENT (k);
1007
1008 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1009 break;
1010
1011 heap [k] = heap [p];
1012 ev_active (ANHE_w (heap [k])) = k;
1013 k = p;
1014 }
1015
1016 heap [k] = he;
1017 ev_active (ANHE_w (he)) = k;
1018}
1019
1020/* move an element suitably so it is in a correct place */
1021inline_size void
1022adjustheap (ANHE *heap, int N, int k)
1023{
1024 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
1025 upheap (heap, k);
1026 else
1027 downheap (heap, N, k);
1028}
1029
1030/* rebuild the heap: this function is used only once and executed rarely */
1031inline_size void
1032reheap (ANHE *heap, int N)
1033{
1034 int i;
1035
1036 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1037 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1038 for (i = 0; i < N; ++i)
1039 upheap (heap, i + HEAP0);
1040}
1041
1042/*****************************************************************************/
1043
1044/* associate signal watchers to a signal signal */
96typedef struct 1045typedef struct
97{ 1046{
98 struct ev_io *head; 1047 WL head;
99 unsigned char wev, rev; /* want, received event set */ 1048 EV_ATOMIC_T gotsig;
100} ANFD;
101
102static ANFD *anfds;
103static int anfdmax;
104
105static int *fdchanges;
106static int fdchangemax, fdchangecnt;
107
108static void
109anfds_init (ANFD *base, int count)
110{
111 while (count--)
112 {
113 base->head = 0;
114 base->wev = base->rev = EV_NONE;
115 ++base;
116 }
117}
118
119typedef struct
120{
121 W w;
122 int events;
123} ANPENDING;
124
125static ANPENDING *pendings;
126static int pendingmax, pendingcnt;
127
128static void
129event (W w, int events)
130{
131 w->pending = ++pendingcnt;
132 array_needsize (pendings, pendingmax, pendingcnt, );
133 pendings [pendingcnt - 1].w = w;
134 pendings [pendingcnt - 1].events = events;
135}
136
137static void
138fd_event (int fd, int events)
139{
140 ANFD *anfd = anfds + fd;
141 struct ev_io *w;
142
143 for (w = anfd->head; w; w = w->next)
144 {
145 int ev = w->events & events;
146
147 if (ev)
148 event ((W)w, ev);
149 }
150}
151
152static void
153queue_events (W *events, int eventcnt, int type)
154{
155 int i;
156
157 for (i = 0; i < eventcnt; ++i)
158 event (events [i], type);
159}
160
161/*****************************************************************************/
162
163static struct ev_timer **timers;
164static int timermax, timercnt;
165
166static struct ev_periodic **periodics;
167static int periodicmax, periodiccnt;
168
169static void
170upheap (WT *timers, int k)
171{
172 WT w = timers [k];
173
174 while (k && timers [k >> 1]->at > w->at)
175 {
176 timers [k] = timers [k >> 1];
177 timers [k]->active = k + 1;
178 k >>= 1;
179 }
180
181 timers [k] = w;
182 timers [k]->active = k + 1;
183
184}
185
186static void
187downheap (WT *timers, int N, int k)
188{
189 WT w = timers [k];
190
191 while (k < (N >> 1))
192 {
193 int j = k << 1;
194
195 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
196 ++j;
197
198 if (w->at <= timers [j]->at)
199 break;
200
201 timers [k] = timers [j];
202 timers [k]->active = k + 1;
203 k = j;
204 }
205
206 timers [k] = w;
207 timers [k]->active = k + 1;
208}
209
210/*****************************************************************************/
211
212typedef struct
213{
214 struct ev_signal *head;
215 sig_atomic_t gotsig;
216} ANSIG; 1049} ANSIG;
217 1050
218static ANSIG *signals; 1051static ANSIG *signals;
219static int signalmax; 1052static int signalmax;
220 1053
221static int sigpipe [2]; 1054static EV_ATOMIC_T gotsig;
222static sig_atomic_t gotsig;
223static struct ev_io sigev;
224
225static void
226signals_init (ANSIG *base, int count)
227{
228 while (count--)
229 {
230 base->head = 0;
231 base->gotsig = 0;
232 ++base;
233 }
234}
235
236static void
237sighandler (int signum)
238{
239 signals [signum - 1].gotsig = 1;
240
241 if (!gotsig)
242 {
243 gotsig = 1;
244 write (sigpipe [1], &gotsig, 1);
245 }
246}
247
248static void
249sigcb (struct ev_io *iow, int revents)
250{
251 struct ev_signal *w;
252 int sig;
253
254 gotsig = 0;
255 read (sigpipe [0], &revents, 1);
256
257 for (sig = signalmax; sig--; )
258 if (signals [sig].gotsig)
259 {
260 signals [sig].gotsig = 0;
261
262 for (w = signals [sig].head; w; w = w->next)
263 event ((W)w, EV_SIGNAL);
264 }
265}
266
267static void
268siginit (void)
269{
270 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
271 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
272
273 /* rather than sort out wether we really need nb, set it */
274 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
275 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
276
277 evio_set (&sigev, sigpipe [0], EV_READ);
278 evio_start (&sigev);
279}
280 1055
281/*****************************************************************************/ 1056/*****************************************************************************/
282 1057
283static struct ev_idle **idles; 1058/* used to prepare libev internal fd's */
284static int idlemax, idlecnt; 1059/* this is not fork-safe */
285 1060inline_speed void
286static struct ev_check **checks; 1061fd_intern (int fd)
287static int checkmax, checkcnt;
288
289/*****************************************************************************/
290
291#if HAVE_EPOLL
292# include "ev_epoll.c"
293#endif
294#if HAVE_SELECT
295# include "ev_select.c"
296#endif
297
298int ev_init (int flags)
299{ 1062{
300#if HAVE_MONOTONIC 1063#ifdef _WIN32
301 { 1064 unsigned long arg = 1;
302 struct timespec ts; 1065 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
303 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1066#else
304 have_monotonic = 1; 1067 fcntl (fd, F_SETFD, FD_CLOEXEC);
305 } 1068 fcntl (fd, F_SETFL, O_NONBLOCK);
306#endif 1069#endif
1070}
307 1071
308 ev_now = ev_time (); 1072static void noinline
309 now = get_clock (); 1073evpipe_init (EV_P)
310 diff = ev_now - now; 1074{
311 1075 if (!ev_is_active (&pipe_w))
312 if (pipe (sigpipe))
313 return 0;
314
315 ev_method = EVMETHOD_NONE;
316#if HAVE_EPOLL
317 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
318#endif
319#if HAVE_SELECT
320 if (ev_method == EVMETHOD_NONE) select_init (flags);
321#endif
322
323 if (ev_method)
324 {
325 evw_init (&sigev, sigcb);
326 siginit ();
327 } 1076 {
328 1077#if EV_USE_EVENTFD
329 return ev_method; 1078 if ((evfd = eventfd (0, 0)) >= 0)
330}
331
332/*****************************************************************************/
333
334void ev_prefork (void)
335{
336 /* nop */
337}
338
339void ev_postfork_parent (void)
340{
341 /* nop */
342}
343
344void ev_postfork_child (void)
345{
346#if HAVE_EPOLL
347 if (ev_method == EVMETHOD_EPOLL)
348 epoll_postfork_child ();
349#endif
350
351 evio_stop (&sigev);
352 close (sigpipe [0]);
353 close (sigpipe [1]);
354 pipe (sigpipe);
355 siginit ();
356}
357
358/*****************************************************************************/
359
360static void
361fd_reify (void)
362{
363 int i;
364
365 for (i = 0; i < fdchangecnt; ++i)
366 {
367 int fd = fdchanges [i];
368 ANFD *anfd = anfds + fd;
369 struct ev_io *w;
370
371 int wev = 0;
372
373 for (w = anfd->head; w; w = w->next)
374 wev |= w->events;
375
376 if (anfd->wev != wev)
377 { 1079 {
378 method_modify (fd, anfd->wev, wev); 1080 evpipe [0] = -1;
379 anfd->wev = wev; 1081 fd_intern (evfd);
380 } 1082 ev_io_set (&pipe_w, evfd, EV_READ);
381 }
382
383 fdchangecnt = 0;
384}
385
386static void
387call_pending ()
388{
389 int i;
390
391 for (i = 0; i < pendingcnt; ++i)
392 {
393 ANPENDING *p = pendings + i;
394
395 if (p->w)
396 {
397 p->w->pending = 0;
398 p->w->cb (p->w, p->events);
399 }
400 }
401
402 pendingcnt = 0;
403}
404
405static void
406timers_reify ()
407{
408 while (timercnt && timers [0]->at <= now)
409 {
410 struct ev_timer *w = timers [0];
411
412 /* first reschedule or stop timer */
413 if (w->repeat)
414 {
415 w->at = now + w->repeat;
416 assert (("timer timeout in the past, negative repeat?", w->at > now));
417 downheap ((WT *)timers, timercnt, 0);
418 } 1083 }
419 else 1084 else
420 evtimer_stop (w); /* nonrepeating: stop timer */ 1085#endif
421
422 event ((W)w, EV_TIMEOUT);
423 }
424}
425
426static void
427periodics_reify ()
428{
429 while (periodiccnt && periodics [0]->at <= ev_now)
430 {
431 struct ev_periodic *w = periodics [0];
432
433 /* first reschedule or stop timer */
434 if (w->interval)
435 { 1086 {
436 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1087 while (pipe (evpipe))
437 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1088 ev_syserr ("(libev) error creating signal/async pipe");
438 downheap ((WT *)periodics, periodiccnt, 0); 1089
1090 fd_intern (evpipe [0]);
1091 fd_intern (evpipe [1]);
1092 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1093 }
1094
1095 ev_io_start (EV_A_ &pipe_w);
1096 ev_unref (EV_A); /* watcher should not keep loop alive */
1097 }
1098}
1099
1100inline_size void
1101evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1102{
1103 if (!*flag)
1104 {
1105 int old_errno = errno; /* save errno because write might clobber it */
1106
1107 *flag = 1;
1108
1109#if EV_USE_EVENTFD
1110 if (evfd >= 0)
1111 {
1112 uint64_t counter = 1;
1113 write (evfd, &counter, sizeof (uint64_t));
439 } 1114 }
440 else 1115 else
441 evperiodic_stop (w); /* nonrepeating: stop timer */ 1116#endif
1117 write (evpipe [1], &old_errno, 1);
442 1118
443 event ((W)w, EV_TIMEOUT); 1119 errno = old_errno;
444 } 1120 }
445} 1121}
446 1122
1123/* called whenever the libev signal pipe */
1124/* got some events (signal, async) */
447static void 1125static void
448periodics_reschedule (ev_tstamp diff) 1126pipecb (EV_P_ ev_io *iow, int revents)
1127{
1128#if EV_USE_EVENTFD
1129 if (evfd >= 0)
1130 {
1131 uint64_t counter;
1132 read (evfd, &counter, sizeof (uint64_t));
1133 }
1134 else
1135#endif
1136 {
1137 char dummy;
1138 read (evpipe [0], &dummy, 1);
1139 }
1140
1141 if (gotsig && ev_is_default_loop (EV_A))
1142 {
1143 int signum;
1144 gotsig = 0;
1145
1146 for (signum = signalmax; signum--; )
1147 if (signals [signum].gotsig)
1148 ev_feed_signal_event (EV_A_ signum + 1);
1149 }
1150
1151#if EV_ASYNC_ENABLE
1152 if (gotasync)
1153 {
1154 int i;
1155 gotasync = 0;
1156
1157 for (i = asynccnt; i--; )
1158 if (asyncs [i]->sent)
1159 {
1160 asyncs [i]->sent = 0;
1161 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1162 }
1163 }
1164#endif
1165}
1166
1167/*****************************************************************************/
1168
1169static void
1170ev_sighandler (int signum)
1171{
1172#if EV_MULTIPLICITY
1173 struct ev_loop *loop = &default_loop_struct;
1174#endif
1175
1176#if _WIN32
1177 signal (signum, ev_sighandler);
1178#endif
1179
1180 signals [signum - 1].gotsig = 1;
1181 evpipe_write (EV_A_ &gotsig);
1182}
1183
1184void noinline
1185ev_feed_signal_event (EV_P_ int signum)
1186{
1187 WL w;
1188
1189#if EV_MULTIPLICITY
1190 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1191#endif
1192
1193 --signum;
1194
1195 if (signum < 0 || signum >= signalmax)
1196 return;
1197
1198 signals [signum].gotsig = 0;
1199
1200 for (w = signals [signum].head; w; w = w->next)
1201 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1202}
1203
1204/*****************************************************************************/
1205
1206static WL childs [EV_PID_HASHSIZE];
1207
1208#ifndef _WIN32
1209
1210static ev_signal childev;
1211
1212#ifndef WIFCONTINUED
1213# define WIFCONTINUED(status) 0
1214#endif
1215
1216/* handle a single child status event */
1217inline_speed void
1218child_reap (EV_P_ int chain, int pid, int status)
1219{
1220 ev_child *w;
1221 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1222
1223 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1224 {
1225 if ((w->pid == pid || !w->pid)
1226 && (!traced || (w->flags & 1)))
1227 {
1228 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1229 w->rpid = pid;
1230 w->rstatus = status;
1231 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1232 }
1233 }
1234}
1235
1236#ifndef WCONTINUED
1237# define WCONTINUED 0
1238#endif
1239
1240/* called on sigchld etc., calls waitpid */
1241static void
1242childcb (EV_P_ ev_signal *sw, int revents)
1243{
1244 int pid, status;
1245
1246 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1247 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1248 if (!WCONTINUED
1249 || errno != EINVAL
1250 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1251 return;
1252
1253 /* make sure we are called again until all children have been reaped */
1254 /* we need to do it this way so that the callback gets called before we continue */
1255 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1256
1257 child_reap (EV_A_ pid, pid, status);
1258 if (EV_PID_HASHSIZE > 1)
1259 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1260}
1261
1262#endif
1263
1264/*****************************************************************************/
1265
1266#if EV_USE_PORT
1267# include "ev_port.c"
1268#endif
1269#if EV_USE_KQUEUE
1270# include "ev_kqueue.c"
1271#endif
1272#if EV_USE_EPOLL
1273# include "ev_epoll.c"
1274#endif
1275#if EV_USE_POLL
1276# include "ev_poll.c"
1277#endif
1278#if EV_USE_SELECT
1279# include "ev_select.c"
1280#endif
1281
1282int
1283ev_version_major (void)
1284{
1285 return EV_VERSION_MAJOR;
1286}
1287
1288int
1289ev_version_minor (void)
1290{
1291 return EV_VERSION_MINOR;
1292}
1293
1294/* return true if we are running with elevated privileges and should ignore env variables */
1295int inline_size
1296enable_secure (void)
1297{
1298#ifdef _WIN32
1299 return 0;
1300#else
1301 return getuid () != geteuid ()
1302 || getgid () != getegid ();
1303#endif
1304}
1305
1306unsigned int
1307ev_supported_backends (void)
1308{
1309 unsigned int flags = 0;
1310
1311 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1312 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1313 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1314 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1315 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1316
1317 return flags;
1318}
1319
1320unsigned int
1321ev_recommended_backends (void)
1322{
1323 unsigned int flags = ev_supported_backends ();
1324
1325#ifndef __NetBSD__
1326 /* kqueue is borked on everything but netbsd apparently */
1327 /* it usually doesn't work correctly on anything but sockets and pipes */
1328 flags &= ~EVBACKEND_KQUEUE;
1329#endif
1330#ifdef __APPLE__
1331 /* only select works correctly on that "unix-certified" platform */
1332 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1333 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1334#endif
1335
1336 return flags;
1337}
1338
1339unsigned int
1340ev_embeddable_backends (void)
1341{
1342 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1343
1344 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1345 /* please fix it and tell me how to detect the fix */
1346 flags &= ~EVBACKEND_EPOLL;
1347
1348 return flags;
1349}
1350
1351unsigned int
1352ev_backend (EV_P)
1353{
1354 return backend;
1355}
1356
1357unsigned int
1358ev_loop_count (EV_P)
1359{
1360 return loop_count;
1361}
1362
1363unsigned int
1364ev_loop_depth (EV_P)
1365{
1366 return loop_depth;
1367}
1368
1369void
1370ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1371{
1372 io_blocktime = interval;
1373}
1374
1375void
1376ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1377{
1378 timeout_blocktime = interval;
1379}
1380
1381/* initialise a loop structure, must be zero-initialised */
1382static void noinline
1383loop_init (EV_P_ unsigned int flags)
1384{
1385 if (!backend)
1386 {
1387#if EV_USE_REALTIME
1388 if (!have_realtime)
1389 {
1390 struct timespec ts;
1391
1392 if (!clock_gettime (CLOCK_REALTIME, &ts))
1393 have_realtime = 1;
1394 }
1395#endif
1396
1397#if EV_USE_MONOTONIC
1398 if (!have_monotonic)
1399 {
1400 struct timespec ts;
1401
1402 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1403 have_monotonic = 1;
1404 }
1405#endif
1406
1407 ev_rt_now = ev_time ();
1408 mn_now = get_clock ();
1409 now_floor = mn_now;
1410 rtmn_diff = ev_rt_now - mn_now;
1411
1412 io_blocktime = 0.;
1413 timeout_blocktime = 0.;
1414 backend = 0;
1415 backend_fd = -1;
1416 gotasync = 0;
1417#if EV_USE_INOTIFY
1418 fs_fd = -2;
1419#endif
1420
1421 /* pid check not overridable via env */
1422#ifndef _WIN32
1423 if (flags & EVFLAG_FORKCHECK)
1424 curpid = getpid ();
1425#endif
1426
1427 if (!(flags & EVFLAG_NOENV)
1428 && !enable_secure ()
1429 && getenv ("LIBEV_FLAGS"))
1430 flags = atoi (getenv ("LIBEV_FLAGS"));
1431
1432 if (!(flags & 0x0000ffffU))
1433 flags |= ev_recommended_backends ();
1434
1435#if EV_USE_PORT
1436 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1437#endif
1438#if EV_USE_KQUEUE
1439 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1440#endif
1441#if EV_USE_EPOLL
1442 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1443#endif
1444#if EV_USE_POLL
1445 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1446#endif
1447#if EV_USE_SELECT
1448 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1449#endif
1450
1451 ev_prepare_init (&pending_w, pendingcb);
1452
1453 ev_init (&pipe_w, pipecb);
1454 ev_set_priority (&pipe_w, EV_MAXPRI);
1455 }
1456}
1457
1458/* free up a loop structure */
1459static void noinline
1460loop_destroy (EV_P)
449{ 1461{
450 int i; 1462 int i;
451 1463
452 /* adjust periodics after time jump */ 1464 if (ev_is_active (&pipe_w))
453 for (i = 0; i < periodiccnt; ++i)
454 { 1465 {
455 struct ev_periodic *w = periodics [i]; 1466 ev_ref (EV_A); /* signal watcher */
1467 ev_io_stop (EV_A_ &pipe_w);
456 1468
457 if (w->interval) 1469#if EV_USE_EVENTFD
1470 if (evfd >= 0)
1471 close (evfd);
1472#endif
1473
1474 if (evpipe [0] >= 0)
458 { 1475 {
459 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1476 close (evpipe [0]);
1477 close (evpipe [1]);
1478 }
1479 }
460 1480
461 if (fabs (diff) >= 1e-4) 1481#if EV_USE_INOTIFY
1482 if (fs_fd >= 0)
1483 close (fs_fd);
1484#endif
1485
1486 if (backend_fd >= 0)
1487 close (backend_fd);
1488
1489#if EV_USE_PORT
1490 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1491#endif
1492#if EV_USE_KQUEUE
1493 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1494#endif
1495#if EV_USE_EPOLL
1496 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1497#endif
1498#if EV_USE_POLL
1499 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1500#endif
1501#if EV_USE_SELECT
1502 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1503#endif
1504
1505 for (i = NUMPRI; i--; )
1506 {
1507 array_free (pending, [i]);
1508#if EV_IDLE_ENABLE
1509 array_free (idle, [i]);
1510#endif
1511 }
1512
1513 ev_free (anfds); anfdmax = 0;
1514
1515 /* have to use the microsoft-never-gets-it-right macro */
1516 array_free (rfeed, EMPTY);
1517 array_free (fdchange, EMPTY);
1518 array_free (timer, EMPTY);
1519#if EV_PERIODIC_ENABLE
1520 array_free (periodic, EMPTY);
1521#endif
1522#if EV_FORK_ENABLE
1523 array_free (fork, EMPTY);
1524#endif
1525 array_free (prepare, EMPTY);
1526 array_free (check, EMPTY);
1527#if EV_ASYNC_ENABLE
1528 array_free (async, EMPTY);
1529#endif
1530
1531 backend = 0;
1532}
1533
1534#if EV_USE_INOTIFY
1535inline_size void infy_fork (EV_P);
1536#endif
1537
1538inline_size void
1539loop_fork (EV_P)
1540{
1541#if EV_USE_PORT
1542 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1543#endif
1544#if EV_USE_KQUEUE
1545 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1546#endif
1547#if EV_USE_EPOLL
1548 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1549#endif
1550#if EV_USE_INOTIFY
1551 infy_fork (EV_A);
1552#endif
1553
1554 if (ev_is_active (&pipe_w))
1555 {
1556 /* this "locks" the handlers against writing to the pipe */
1557 /* while we modify the fd vars */
1558 gotsig = 1;
1559#if EV_ASYNC_ENABLE
1560 gotasync = 1;
1561#endif
1562
1563 ev_ref (EV_A);
1564 ev_io_stop (EV_A_ &pipe_w);
1565
1566#if EV_USE_EVENTFD
1567 if (evfd >= 0)
1568 close (evfd);
1569#endif
1570
1571 if (evpipe [0] >= 0)
1572 {
1573 close (evpipe [0]);
1574 close (evpipe [1]);
1575 }
1576
1577 evpipe_init (EV_A);
1578 /* now iterate over everything, in case we missed something */
1579 pipecb (EV_A_ &pipe_w, EV_READ);
1580 }
1581
1582 postfork = 0;
1583}
1584
1585#if EV_MULTIPLICITY
1586
1587struct ev_loop *
1588ev_loop_new (unsigned int flags)
1589{
1590 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1591
1592 memset (loop, 0, sizeof (struct ev_loop));
1593
1594 loop_init (EV_A_ flags);
1595
1596 if (ev_backend (EV_A))
1597 return loop;
1598
1599 return 0;
1600}
1601
1602void
1603ev_loop_destroy (EV_P)
1604{
1605 loop_destroy (EV_A);
1606 ev_free (loop);
1607}
1608
1609void
1610ev_loop_fork (EV_P)
1611{
1612 postfork = 1; /* must be in line with ev_default_fork */
1613}
1614
1615#if EV_VERIFY
1616static void noinline
1617verify_watcher (EV_P_ W w)
1618{
1619 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1620
1621 if (w->pending)
1622 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1623}
1624
1625static void noinline
1626verify_heap (EV_P_ ANHE *heap, int N)
1627{
1628 int i;
1629
1630 for (i = HEAP0; i < N + HEAP0; ++i)
1631 {
1632 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1633 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1634 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1635
1636 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1637 }
1638}
1639
1640static void noinline
1641array_verify (EV_P_ W *ws, int cnt)
1642{
1643 while (cnt--)
1644 {
1645 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1646 verify_watcher (EV_A_ ws [cnt]);
1647 }
1648}
1649#endif
1650
1651void
1652ev_loop_verify (EV_P)
1653{
1654#if EV_VERIFY
1655 int i;
1656 WL w;
1657
1658 assert (activecnt >= -1);
1659
1660 assert (fdchangemax >= fdchangecnt);
1661 for (i = 0; i < fdchangecnt; ++i)
1662 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1663
1664 assert (anfdmax >= 0);
1665 for (i = 0; i < anfdmax; ++i)
1666 for (w = anfds [i].head; w; w = w->next)
1667 {
1668 verify_watcher (EV_A_ (W)w);
1669 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1670 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1671 }
1672
1673 assert (timermax >= timercnt);
1674 verify_heap (EV_A_ timers, timercnt);
1675
1676#if EV_PERIODIC_ENABLE
1677 assert (periodicmax >= periodiccnt);
1678 verify_heap (EV_A_ periodics, periodiccnt);
1679#endif
1680
1681 for (i = NUMPRI; i--; )
1682 {
1683 assert (pendingmax [i] >= pendingcnt [i]);
1684#if EV_IDLE_ENABLE
1685 assert (idleall >= 0);
1686 assert (idlemax [i] >= idlecnt [i]);
1687 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1688#endif
1689 }
1690
1691#if EV_FORK_ENABLE
1692 assert (forkmax >= forkcnt);
1693 array_verify (EV_A_ (W *)forks, forkcnt);
1694#endif
1695
1696#if EV_ASYNC_ENABLE
1697 assert (asyncmax >= asynccnt);
1698 array_verify (EV_A_ (W *)asyncs, asynccnt);
1699#endif
1700
1701 assert (preparemax >= preparecnt);
1702 array_verify (EV_A_ (W *)prepares, preparecnt);
1703
1704 assert (checkmax >= checkcnt);
1705 array_verify (EV_A_ (W *)checks, checkcnt);
1706
1707# if 0
1708 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1709 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1710# endif
1711#endif
1712}
1713
1714#endif /* multiplicity */
1715
1716#if EV_MULTIPLICITY
1717struct ev_loop *
1718ev_default_loop_init (unsigned int flags)
1719#else
1720int
1721ev_default_loop (unsigned int flags)
1722#endif
1723{
1724 if (!ev_default_loop_ptr)
1725 {
1726#if EV_MULTIPLICITY
1727 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1728#else
1729 ev_default_loop_ptr = 1;
1730#endif
1731
1732 loop_init (EV_A_ flags);
1733
1734 if (ev_backend (EV_A))
1735 {
1736#ifndef _WIN32
1737 ev_signal_init (&childev, childcb, SIGCHLD);
1738 ev_set_priority (&childev, EV_MAXPRI);
1739 ev_signal_start (EV_A_ &childev);
1740 ev_unref (EV_A); /* child watcher should not keep loop alive */
1741#endif
1742 }
1743 else
1744 ev_default_loop_ptr = 0;
1745 }
1746
1747 return ev_default_loop_ptr;
1748}
1749
1750void
1751ev_default_destroy (void)
1752{
1753#if EV_MULTIPLICITY
1754 struct ev_loop *loop = ev_default_loop_ptr;
1755#endif
1756
1757 ev_default_loop_ptr = 0;
1758
1759#ifndef _WIN32
1760 ev_ref (EV_A); /* child watcher */
1761 ev_signal_stop (EV_A_ &childev);
1762#endif
1763
1764 loop_destroy (EV_A);
1765}
1766
1767void
1768ev_default_fork (void)
1769{
1770#if EV_MULTIPLICITY
1771 struct ev_loop *loop = ev_default_loop_ptr;
1772#endif
1773
1774 postfork = 1; /* must be in line with ev_loop_fork */
1775}
1776
1777/*****************************************************************************/
1778
1779void
1780ev_invoke (EV_P_ void *w, int revents)
1781{
1782 EV_CB_INVOKE ((W)w, revents);
1783}
1784
1785inline_speed void
1786call_pending (EV_P)
1787{
1788 int pri;
1789
1790 for (pri = NUMPRI; pri--; )
1791 while (pendingcnt [pri])
1792 {
1793 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1794
1795 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1796 /* ^ this is no longer true, as pending_w could be here */
1797
1798 p->w->pending = 0;
1799 EV_CB_INVOKE (p->w, p->events);
1800 EV_FREQUENT_CHECK;
1801 }
1802}
1803
1804#if EV_IDLE_ENABLE
1805/* make idle watchers pending. this handles the "call-idle */
1806/* only when higher priorities are idle" logic */
1807inline_size void
1808idle_reify (EV_P)
1809{
1810 if (expect_false (idleall))
1811 {
1812 int pri;
1813
1814 for (pri = NUMPRI; pri--; )
1815 {
1816 if (pendingcnt [pri])
1817 break;
1818
1819 if (idlecnt [pri])
462 { 1820 {
463 evperiodic_stop (w); 1821 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
464 evperiodic_start (w); 1822 break;
465
466 i = 0; /* restart loop, inefficient, but time jumps should be rare */
467 } 1823 }
468 } 1824 }
469 } 1825 }
470} 1826}
1827#endif
471 1828
472static void 1829/* make timers pending */
473time_update () 1830inline_size void
1831timers_reify (EV_P)
1832{
1833 EV_FREQUENT_CHECK;
1834
1835 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1836 {
1837 do
1838 {
1839 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1840
1841 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
1842
1843 /* first reschedule or stop timer */
1844 if (w->repeat)
1845 {
1846 ev_at (w) += w->repeat;
1847 if (ev_at (w) < mn_now)
1848 ev_at (w) = mn_now;
1849
1850 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1851
1852 ANHE_at_cache (timers [HEAP0]);
1853 downheap (timers, timercnt, HEAP0);
1854 }
1855 else
1856 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1857
1858 EV_FREQUENT_CHECK;
1859 feed_reverse (EV_A_ (W)w);
1860 }
1861 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1862
1863 feed_reverse_done (EV_A_ EV_TIMEOUT);
1864 }
1865}
1866
1867#if EV_PERIODIC_ENABLE
1868/* make periodics pending */
1869inline_size void
1870periodics_reify (EV_P)
1871{
1872 EV_FREQUENT_CHECK;
1873
1874 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1875 {
1876 int feed_count = 0;
1877
1878 do
1879 {
1880 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1881
1882 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1883
1884 /* first reschedule or stop timer */
1885 if (w->reschedule_cb)
1886 {
1887 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1888
1889 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1890
1891 ANHE_at_cache (periodics [HEAP0]);
1892 downheap (periodics, periodiccnt, HEAP0);
1893 }
1894 else if (w->interval)
1895 {
1896 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1897 /* if next trigger time is not sufficiently in the future, put it there */
1898 /* this might happen because of floating point inexactness */
1899 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1900 {
1901 ev_at (w) += w->interval;
1902
1903 /* if interval is unreasonably low we might still have a time in the past */
1904 /* so correct this. this will make the periodic very inexact, but the user */
1905 /* has effectively asked to get triggered more often than possible */
1906 if (ev_at (w) < ev_rt_now)
1907 ev_at (w) = ev_rt_now;
1908 }
1909
1910 ANHE_at_cache (periodics [HEAP0]);
1911 downheap (periodics, periodiccnt, HEAP0);
1912 }
1913 else
1914 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1915
1916 EV_FREQUENT_CHECK;
1917 feed_reverse (EV_A_ (W)w);
1918 }
1919 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1920
1921 feed_reverse_done (EV_A_ EV_PERIODIC);
1922 }
1923}
1924
1925/* simply recalculate all periodics */
1926/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1927static void noinline
1928periodics_reschedule (EV_P)
474{ 1929{
475 int i; 1930 int i;
476 1931
477 ev_now = ev_time (); 1932 /* adjust periodics after time jump */
1933 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1934 {
1935 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
478 1936
479 if (have_monotonic) 1937 if (w->reschedule_cb)
1938 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1939 else if (w->interval)
1940 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1941
1942 ANHE_at_cache (periodics [i]);
480 { 1943 }
1944
1945 reheap (periodics, periodiccnt);
1946}
1947#endif
1948
1949/* adjust all timers by a given offset */
1950static void noinline
1951timers_reschedule (EV_P_ ev_tstamp adjust)
1952{
1953 int i;
1954
1955 for (i = 0; i < timercnt; ++i)
1956 {
1957 ANHE *he = timers + i + HEAP0;
1958 ANHE_w (*he)->at += adjust;
1959 ANHE_at_cache (*he);
1960 }
1961}
1962
1963/* fetch new monotonic and realtime times from the kernel */
1964/* also detetc if there was a timejump, and act accordingly */
1965inline_speed void
1966time_update (EV_P_ ev_tstamp max_block)
1967{
1968#if EV_USE_MONOTONIC
1969 if (expect_true (have_monotonic))
1970 {
1971 int i;
481 ev_tstamp odiff = diff; 1972 ev_tstamp odiff = rtmn_diff;
482 1973
483 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1974 mn_now = get_clock ();
1975
1976 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1977 /* interpolate in the meantime */
1978 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
484 { 1979 {
485 now = get_clock (); 1980 ev_rt_now = rtmn_diff + mn_now;
1981 return;
1982 }
1983
1984 now_floor = mn_now;
1985 ev_rt_now = ev_time ();
1986
1987 /* loop a few times, before making important decisions.
1988 * on the choice of "4": one iteration isn't enough,
1989 * in case we get preempted during the calls to
1990 * ev_time and get_clock. a second call is almost guaranteed
1991 * to succeed in that case, though. and looping a few more times
1992 * doesn't hurt either as we only do this on time-jumps or
1993 * in the unlikely event of having been preempted here.
1994 */
1995 for (i = 4; --i; )
1996 {
486 diff = ev_now - now; 1997 rtmn_diff = ev_rt_now - mn_now;
487 1998
488 if (fabs (odiff - diff) < MIN_TIMEJUMP) 1999 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
489 return; /* all is well */ 2000 return; /* all is well */
490 2001
491 ev_now = ev_time (); 2002 ev_rt_now = ev_time ();
2003 mn_now = get_clock ();
2004 now_floor = mn_now;
492 } 2005 }
493 2006
494 periodics_reschedule (diff - odiff);
495 /* no timer adjustment, as the monotonic clock doesn't jump */ 2007 /* no timer adjustment, as the monotonic clock doesn't jump */
2008 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2009# if EV_PERIODIC_ENABLE
2010 periodics_reschedule (EV_A);
2011# endif
496 } 2012 }
497 else 2013 else
2014#endif
498 { 2015 {
499 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 2016 ev_rt_now = ev_time ();
2017
2018 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
500 { 2019 {
501 periodics_reschedule (ev_now - now);
502
503 /* adjust timers. this is easy, as the offset is the same for all */ 2020 /* adjust timers. this is easy, as the offset is the same for all of them */
504 for (i = 0; i < timercnt; ++i) 2021 timers_reschedule (EV_A_ ev_rt_now - mn_now);
505 timers [i]->at += diff; 2022#if EV_PERIODIC_ENABLE
2023 periodics_reschedule (EV_A);
2024#endif
506 } 2025 }
507 2026
508 now = ev_now; 2027 mn_now = ev_rt_now;
509 }
510}
511
512int ev_loop_done;
513
514void ev_loop (int flags)
515{
516 double block;
517 ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
518
519 if (checkcnt)
520 { 2028 }
521 queue_events ((W *)checks, checkcnt, EV_CHECK); 2029}
522 call_pending (); 2030
523 } 2031void
2032ev_loop (EV_P_ int flags)
2033{
2034 ++loop_depth;
2035
2036 loop_done = EVUNLOOP_CANCEL;
2037
2038 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
524 2039
525 do 2040 do
526 { 2041 {
2042#if EV_VERIFY >= 2
2043 ev_loop_verify (EV_A);
2044#endif
2045
2046#ifndef _WIN32
2047 if (expect_false (curpid)) /* penalise the forking check even more */
2048 if (expect_false (getpid () != curpid))
2049 {
2050 curpid = getpid ();
2051 postfork = 1;
2052 }
2053#endif
2054
2055#if EV_FORK_ENABLE
2056 /* we might have forked, so queue fork handlers */
2057 if (expect_false (postfork))
2058 if (forkcnt)
2059 {
2060 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2061 call_pending (EV_A);
2062 }
2063#endif
2064
2065 /* queue prepare watchers (and execute them) */
2066 if (expect_false (preparecnt))
2067 {
2068 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2069 call_pending (EV_A);
2070 }
2071
2072 /* we might have forked, so reify kernel state if necessary */
2073 if (expect_false (postfork))
2074 loop_fork (EV_A);
2075
527 /* update fd-related kernel structures */ 2076 /* update fd-related kernel structures */
528 fd_reify (); 2077 fd_reify (EV_A);
529 2078
530 /* calculate blocking time */ 2079 /* calculate blocking time */
2080 {
2081 ev_tstamp waittime = 0.;
2082 ev_tstamp sleeptime = 0.;
531 2083
532 /* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */ 2084 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
533 ev_now = ev_time ();
534
535 if (flags & EVLOOP_NONBLOCK || idlecnt)
536 block = 0.;
537 else
538 { 2085 {
2086 /* remember old timestamp for io_blocktime calculation */
2087 ev_tstamp prev_mn_now = mn_now;
2088
2089 /* update time to cancel out callback processing overhead */
2090 time_update (EV_A_ 1e100);
2091
539 block = MAX_BLOCKTIME; 2092 waittime = MAX_BLOCKTIME;
540 2093
541 if (timercnt) 2094 if (timercnt)
542 { 2095 {
543 ev_tstamp to = timers [0]->at - get_clock () + method_fudge; 2096 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
544 if (block > to) block = to; 2097 if (waittime > to) waittime = to;
545 } 2098 }
546 2099
2100#if EV_PERIODIC_ENABLE
547 if (periodiccnt) 2101 if (periodiccnt)
548 { 2102 {
549 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 2103 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
550 if (block > to) block = to; 2104 if (waittime > to) waittime = to;
551 } 2105 }
2106#endif
552 2107
553 if (block < 0.) block = 0.; 2108 /* don't let timeouts decrease the waittime below timeout_blocktime */
2109 if (expect_false (waittime < timeout_blocktime))
2110 waittime = timeout_blocktime;
2111
2112 /* extra check because io_blocktime is commonly 0 */
2113 if (expect_false (io_blocktime))
2114 {
2115 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2116
2117 if (sleeptime > waittime - backend_fudge)
2118 sleeptime = waittime - backend_fudge;
2119
2120 if (expect_true (sleeptime > 0.))
2121 {
2122 ev_sleep (sleeptime);
2123 waittime -= sleeptime;
2124 }
2125 }
554 } 2126 }
555 2127
556 method_poll (block); 2128 ++loop_count;
2129 backend_poll (EV_A_ waittime);
557 2130
558 /* update ev_now, do magic */ 2131 /* update ev_rt_now, do magic */
559 time_update (); 2132 time_update (EV_A_ waittime + sleeptime);
2133 }
560 2134
561 /* queue pending timers and reschedule them */ 2135 /* queue pending timers and reschedule them */
2136 timers_reify (EV_A); /* relative timers called last */
2137#if EV_PERIODIC_ENABLE
562 periodics_reify (); /* absolute timers first */ 2138 periodics_reify (EV_A); /* absolute timers called first */
563 timers_reify (); /* relative timers second */ 2139#endif
564 2140
2141#if EV_IDLE_ENABLE
565 /* queue idle watchers unless io or timers are pending */ 2142 /* queue idle watchers unless other events are pending */
566 if (!pendingcnt) 2143 idle_reify (EV_A);
567 queue_events ((W *)idles, idlecnt, EV_IDLE); 2144#endif
568 2145
569 /* queue check and possibly idle watchers */ 2146 /* queue check watchers, to be executed first */
2147 if (expect_false (checkcnt))
570 queue_events ((W *)checks, checkcnt, EV_CHECK); 2148 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
571 2149
572 call_pending (); 2150 call_pending (EV_A);
573 } 2151 }
574 while (!ev_loop_done); 2152 while (expect_true (
2153 activecnt
2154 && !loop_done
2155 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2156 ));
575 2157
576 if (ev_loop_done != 2) 2158 if (loop_done == EVUNLOOP_ONE)
2159 loop_done = EVUNLOOP_CANCEL;
2160
2161 --loop_depth;
2162}
2163
2164void
2165ev_unloop (EV_P_ int how)
2166{
577 ev_loop_done = 0; 2167 loop_done = how;
2168}
2169
2170void
2171ev_ref (EV_P)
2172{
2173 ++activecnt;
2174}
2175
2176void
2177ev_unref (EV_P)
2178{
2179 --activecnt;
2180}
2181
2182void
2183ev_now_update (EV_P)
2184{
2185 time_update (EV_A_ 1e100);
2186}
2187
2188void
2189ev_suspend (EV_P)
2190{
2191 ev_now_update (EV_A);
2192}
2193
2194void
2195ev_resume (EV_P)
2196{
2197 ev_tstamp mn_prev = mn_now;
2198
2199 ev_now_update (EV_A);
2200 timers_reschedule (EV_A_ mn_now - mn_prev);
2201#if EV_PERIODIC_ENABLE
2202 /* TODO: really do this? */
2203 periodics_reschedule (EV_A);
2204#endif
578} 2205}
579 2206
580/*****************************************************************************/ 2207/*****************************************************************************/
2208/* singly-linked list management, used when the expected list length is short */
581 2209
582static void 2210inline_size void
583wlist_add (WL *head, WL elem) 2211wlist_add (WL *head, WL elem)
584{ 2212{
585 elem->next = *head; 2213 elem->next = *head;
586 *head = elem; 2214 *head = elem;
587} 2215}
588 2216
589static void 2217inline_size void
590wlist_del (WL *head, WL elem) 2218wlist_del (WL *head, WL elem)
591{ 2219{
592 while (*head) 2220 while (*head)
593 { 2221 {
594 if (*head == elem) 2222 if (*head == elem)
… …
599 2227
600 head = &(*head)->next; 2228 head = &(*head)->next;
601 } 2229 }
602} 2230}
603 2231
604static void 2232/* internal, faster, version of ev_clear_pending */
2233inline_speed void
2234clear_pending (EV_P_ W w)
2235{
2236 if (w->pending)
2237 {
2238 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2239 w->pending = 0;
2240 }
2241}
2242
2243int
2244ev_clear_pending (EV_P_ void *w)
2245{
2246 W w_ = (W)w;
2247 int pending = w_->pending;
2248
2249 if (expect_true (pending))
2250 {
2251 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2252 p->w = (W)&pending_w;
2253 w_->pending = 0;
2254 return p->events;
2255 }
2256 else
2257 return 0;
2258}
2259
2260inline_size void
2261pri_adjust (EV_P_ W w)
2262{
2263 int pri = w->priority;
2264 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2265 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2266 w->priority = pri;
2267}
2268
2269inline_speed void
605ev_start (W w, int active) 2270ev_start (EV_P_ W w, int active)
606{ 2271{
607 w->pending = 0; 2272 pri_adjust (EV_A_ w);
608 w->active = active; 2273 w->active = active;
2274 ev_ref (EV_A);
609} 2275}
610 2276
611static void 2277inline_size void
612ev_stop (W w) 2278ev_stop (EV_P_ W w)
613{ 2279{
614 if (w->pending) 2280 ev_unref (EV_A);
615 pendings [w->pending - 1].w = 0;
616
617 w->active = 0; 2281 w->active = 0;
618} 2282}
619 2283
620/*****************************************************************************/ 2284/*****************************************************************************/
621 2285
622void 2286void noinline
623evio_start (struct ev_io *w) 2287ev_io_start (EV_P_ ev_io *w)
624{ 2288{
2289 int fd = w->fd;
2290
2291 if (expect_false (ev_is_active (w)))
2292 return;
2293
2294 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2295 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2296
2297 EV_FREQUENT_CHECK;
2298
2299 ev_start (EV_A_ (W)w, 1);
2300 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2301 wlist_add (&anfds[fd].head, (WL)w);
2302
2303 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
2304 w->events &= ~EV__IOFDSET;
2305
2306 EV_FREQUENT_CHECK;
2307}
2308
2309void noinline
2310ev_io_stop (EV_P_ ev_io *w)
2311{
2312 clear_pending (EV_A_ (W)w);
2313 if (expect_false (!ev_is_active (w)))
2314 return;
2315
2316 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2317
2318 EV_FREQUENT_CHECK;
2319
2320 wlist_del (&anfds[w->fd].head, (WL)w);
2321 ev_stop (EV_A_ (W)w);
2322
2323 fd_change (EV_A_ w->fd, 1);
2324
2325 EV_FREQUENT_CHECK;
2326}
2327
2328void noinline
2329ev_timer_start (EV_P_ ev_timer *w)
2330{
2331 if (expect_false (ev_is_active (w)))
2332 return;
2333
2334 ev_at (w) += mn_now;
2335
2336 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2337
2338 EV_FREQUENT_CHECK;
2339
2340 ++timercnt;
2341 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2342 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2343 ANHE_w (timers [ev_active (w)]) = (WT)w;
2344 ANHE_at_cache (timers [ev_active (w)]);
2345 upheap (timers, ev_active (w));
2346
2347 EV_FREQUENT_CHECK;
2348
2349 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2350}
2351
2352void noinline
2353ev_timer_stop (EV_P_ ev_timer *w)
2354{
2355 clear_pending (EV_A_ (W)w);
2356 if (expect_false (!ev_is_active (w)))
2357 return;
2358
2359 EV_FREQUENT_CHECK;
2360
2361 {
2362 int active = ev_active (w);
2363
2364 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2365
2366 --timercnt;
2367
2368 if (expect_true (active < timercnt + HEAP0))
2369 {
2370 timers [active] = timers [timercnt + HEAP0];
2371 adjustheap (timers, timercnt, active);
2372 }
2373 }
2374
2375 EV_FREQUENT_CHECK;
2376
2377 ev_at (w) -= mn_now;
2378
2379 ev_stop (EV_A_ (W)w);
2380}
2381
2382void noinline
2383ev_timer_again (EV_P_ ev_timer *w)
2384{
2385 EV_FREQUENT_CHECK;
2386
625 if (ev_is_active (w)) 2387 if (ev_is_active (w))
2388 {
2389 if (w->repeat)
2390 {
2391 ev_at (w) = mn_now + w->repeat;
2392 ANHE_at_cache (timers [ev_active (w)]);
2393 adjustheap (timers, timercnt, ev_active (w));
2394 }
2395 else
2396 ev_timer_stop (EV_A_ w);
2397 }
2398 else if (w->repeat)
2399 {
2400 ev_at (w) = w->repeat;
2401 ev_timer_start (EV_A_ w);
2402 }
2403
2404 EV_FREQUENT_CHECK;
2405}
2406
2407#if EV_PERIODIC_ENABLE
2408void noinline
2409ev_periodic_start (EV_P_ ev_periodic *w)
2410{
2411 if (expect_false (ev_is_active (w)))
626 return; 2412 return;
627 2413
628 int fd = w->fd; 2414 if (w->reschedule_cb)
2415 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2416 else if (w->interval)
2417 {
2418 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2419 /* this formula differs from the one in periodic_reify because we do not always round up */
2420 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2421 }
2422 else
2423 ev_at (w) = w->offset;
629 2424
630 ev_start ((W)w, 1); 2425 EV_FREQUENT_CHECK;
631 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
632 wlist_add ((WL *)&anfds[fd].head, (WL)w);
633 2426
634 ++fdchangecnt; 2427 ++periodiccnt;
635 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 2428 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
636 fdchanges [fdchangecnt - 1] = fd; 2429 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
637} 2430 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2431 ANHE_at_cache (periodics [ev_active (w)]);
2432 upheap (periodics, ev_active (w));
638 2433
639void 2434 EV_FREQUENT_CHECK;
640evio_stop (struct ev_io *w) 2435
2436 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2437}
2438
2439void noinline
2440ev_periodic_stop (EV_P_ ev_periodic *w)
641{ 2441{
2442 clear_pending (EV_A_ (W)w);
642 if (!ev_is_active (w)) 2443 if (expect_false (!ev_is_active (w)))
643 return; 2444 return;
644 2445
645 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2446 EV_FREQUENT_CHECK;
2447
2448 {
2449 int active = ev_active (w);
2450
2451 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2452
2453 --periodiccnt;
2454
2455 if (expect_true (active < periodiccnt + HEAP0))
2456 {
2457 periodics [active] = periodics [periodiccnt + HEAP0];
2458 adjustheap (periodics, periodiccnt, active);
2459 }
2460 }
2461
2462 EV_FREQUENT_CHECK;
2463
646 ev_stop ((W)w); 2464 ev_stop (EV_A_ (W)w);
647
648 ++fdchangecnt;
649 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
650 fdchanges [fdchangecnt - 1] = w->fd;
651} 2465}
652 2466
653 2467void noinline
654void 2468ev_periodic_again (EV_P_ ev_periodic *w)
655evtimer_start (struct ev_timer *w)
656{ 2469{
2470 /* TODO: use adjustheap and recalculation */
2471 ev_periodic_stop (EV_A_ w);
2472 ev_periodic_start (EV_A_ w);
2473}
2474#endif
2475
2476#ifndef SA_RESTART
2477# define SA_RESTART 0
2478#endif
2479
2480void noinline
2481ev_signal_start (EV_P_ ev_signal *w)
2482{
2483#if EV_MULTIPLICITY
2484 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2485#endif
657 if (ev_is_active (w)) 2486 if (expect_false (ev_is_active (w)))
658 return; 2487 return;
659 2488
660 w->at += now; 2489 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
661 2490
662 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 2491 evpipe_init (EV_A);
663 2492
664 ev_start ((W)w, ++timercnt); 2493 EV_FREQUENT_CHECK;
665 array_needsize (timers, timermax, timercnt, );
666 timers [timercnt - 1] = w;
667 upheap ((WT *)timers, timercnt - 1);
668}
669 2494
670void 2495 {
671evtimer_stop (struct ev_timer *w) 2496#ifndef _WIN32
2497 sigset_t full, prev;
2498 sigfillset (&full);
2499 sigprocmask (SIG_SETMASK, &full, &prev);
2500#endif
2501
2502 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2503
2504#ifndef _WIN32
2505 sigprocmask (SIG_SETMASK, &prev, 0);
2506#endif
2507 }
2508
2509 ev_start (EV_A_ (W)w, 1);
2510 wlist_add (&signals [w->signum - 1].head, (WL)w);
2511
2512 if (!((WL)w)->next)
2513 {
2514#if _WIN32
2515 signal (w->signum, ev_sighandler);
2516#else
2517 struct sigaction sa;
2518 sa.sa_handler = ev_sighandler;
2519 sigfillset (&sa.sa_mask);
2520 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2521 sigaction (w->signum, &sa, 0);
2522#endif
2523 }
2524
2525 EV_FREQUENT_CHECK;
2526}
2527
2528void noinline
2529ev_signal_stop (EV_P_ ev_signal *w)
672{ 2530{
2531 clear_pending (EV_A_ (W)w);
673 if (!ev_is_active (w)) 2532 if (expect_false (!ev_is_active (w)))
674 return; 2533 return;
675 2534
676 if (w->active < timercnt--) 2535 EV_FREQUENT_CHECK;
677 {
678 timers [w->active - 1] = timers [timercnt];
679 downheap ((WT *)timers, timercnt, w->active - 1);
680 }
681 2536
682 ev_stop ((W)w);
683}
684
685void
686evperiodic_start (struct ev_periodic *w)
687{
688 if (ev_is_active (w))
689 return;
690
691 assert (("periodic interval value less than zero not allowed", w->interval >= 0.));
692
693 /* this formula differs from the one in periodic_reify because we do not always round up */
694 if (w->interval)
695 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
696
697 ev_start ((W)w, ++periodiccnt);
698 array_needsize (periodics, periodicmax, periodiccnt, );
699 periodics [periodiccnt - 1] = w;
700 upheap ((WT *)periodics, periodiccnt - 1);
701}
702
703void
704evperiodic_stop (struct ev_periodic *w)
705{
706 if (!ev_is_active (w))
707 return;
708
709 if (w->active < periodiccnt--)
710 {
711 periodics [w->active - 1] = periodics [periodiccnt];
712 downheap ((WT *)periodics, periodiccnt, w->active - 1);
713 }
714
715 ev_stop ((W)w);
716}
717
718void
719evsignal_start (struct ev_signal *w)
720{
721 if (ev_is_active (w))
722 return;
723
724 ev_start ((W)w, 1);
725 array_needsize (signals, signalmax, w->signum, signals_init);
726 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
727
728 if (!w->next)
729 {
730 struct sigaction sa;
731 sa.sa_handler = sighandler;
732 sigfillset (&sa.sa_mask);
733 sa.sa_flags = 0;
734 sigaction (w->signum, &sa, 0);
735 }
736}
737
738void
739evsignal_stop (struct ev_signal *w)
740{
741 if (!ev_is_active (w))
742 return;
743
744 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2537 wlist_del (&signals [w->signum - 1].head, (WL)w);
745 ev_stop ((W)w); 2538 ev_stop (EV_A_ (W)w);
746 2539
747 if (!signals [w->signum - 1].head) 2540 if (!signals [w->signum - 1].head)
748 signal (w->signum, SIG_DFL); 2541 signal (w->signum, SIG_DFL);
749}
750 2542
751void evidle_start (struct ev_idle *w) 2543 EV_FREQUENT_CHECK;
2544}
2545
2546void
2547ev_child_start (EV_P_ ev_child *w)
752{ 2548{
2549#if EV_MULTIPLICITY
2550 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2551#endif
753 if (ev_is_active (w)) 2552 if (expect_false (ev_is_active (w)))
754 return; 2553 return;
755 2554
756 ev_start ((W)w, ++idlecnt); 2555 EV_FREQUENT_CHECK;
757 array_needsize (idles, idlemax, idlecnt, );
758 idles [idlecnt - 1] = w;
759}
760 2556
761void evidle_stop (struct ev_idle *w) 2557 ev_start (EV_A_ (W)w, 1);
762{ 2558 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
763 idles [w->active - 1] = idles [--idlecnt];
764 ev_stop ((W)w);
765}
766 2559
767void evcheck_start (struct ev_check *w) 2560 EV_FREQUENT_CHECK;
2561}
2562
2563void
2564ev_child_stop (EV_P_ ev_child *w)
768{ 2565{
769 if (ev_is_active (w)) 2566 clear_pending (EV_A_ (W)w);
2567 if (expect_false (!ev_is_active (w)))
770 return; 2568 return;
771 2569
2570 EV_FREQUENT_CHECK;
2571
2572 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2573 ev_stop (EV_A_ (W)w);
2574
2575 EV_FREQUENT_CHECK;
2576}
2577
2578#if EV_STAT_ENABLE
2579
2580# ifdef _WIN32
2581# undef lstat
2582# define lstat(a,b) _stati64 (a,b)
2583# endif
2584
2585#define DEF_STAT_INTERVAL 5.0074891
2586#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2587#define MIN_STAT_INTERVAL 0.1074891
2588
2589static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2590
2591#if EV_USE_INOTIFY
2592# define EV_INOTIFY_BUFSIZE 8192
2593
2594static void noinline
2595infy_add (EV_P_ ev_stat *w)
2596{
2597 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);
2598
2599 if (w->wd < 0)
2600 {
2601 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2602 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2603
2604 /* monitor some parent directory for speedup hints */
2605 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2606 /* but an efficiency issue only */
2607 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2608 {
2609 char path [4096];
2610 strcpy (path, w->path);
2611
2612 do
2613 {
2614 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2615 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2616
2617 char *pend = strrchr (path, '/');
2618
2619 if (!pend || pend == path)
2620 break;
2621
2622 *pend = 0;
2623 w->wd = inotify_add_watch (fs_fd, path, mask);
2624 }
2625 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2626 }
2627 }
2628
2629 if (w->wd >= 0)
2630 {
2631 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2632
2633 /* now local changes will be tracked by inotify, but remote changes won't */
2634 /* unless the filesystem it known to be local, we therefore still poll */
2635 /* also do poll on <2.6.25, but with normal frequency */
2636 struct statfs sfs;
2637
2638 if (fs_2625 && !statfs (w->path, &sfs))
2639 if (sfs.f_type == 0x1373 /* devfs */
2640 || sfs.f_type == 0xEF53 /* ext2/3 */
2641 || sfs.f_type == 0x3153464a /* jfs */
2642 || sfs.f_type == 0x52654973 /* reiser3 */
2643 || sfs.f_type == 0x01021994 /* tempfs */
2644 || sfs.f_type == 0x58465342 /* xfs */)
2645 return;
2646
2647 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2648 ev_timer_again (EV_A_ &w->timer);
2649 }
2650}
2651
2652static void noinline
2653infy_del (EV_P_ ev_stat *w)
2654{
2655 int slot;
2656 int wd = w->wd;
2657
2658 if (wd < 0)
2659 return;
2660
2661 w->wd = -2;
2662 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2663 wlist_del (&fs_hash [slot].head, (WL)w);
2664
2665 /* remove this watcher, if others are watching it, they will rearm */
2666 inotify_rm_watch (fs_fd, wd);
2667}
2668
2669static void noinline
2670infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2671{
2672 if (slot < 0)
2673 /* overflow, need to check for all hash slots */
2674 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2675 infy_wd (EV_A_ slot, wd, ev);
2676 else
2677 {
2678 WL w_;
2679
2680 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2681 {
2682 ev_stat *w = (ev_stat *)w_;
2683 w_ = w_->next; /* lets us remove this watcher and all before it */
2684
2685 if (w->wd == wd || wd == -1)
2686 {
2687 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2688 {
2689 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2690 w->wd = -1;
2691 infy_add (EV_A_ w); /* re-add, no matter what */
2692 }
2693
2694 stat_timer_cb (EV_A_ &w->timer, 0);
2695 }
2696 }
2697 }
2698}
2699
2700static void
2701infy_cb (EV_P_ ev_io *w, int revents)
2702{
2703 char buf [EV_INOTIFY_BUFSIZE];
2704 struct inotify_event *ev = (struct inotify_event *)buf;
2705 int ofs;
2706 int len = read (fs_fd, buf, sizeof (buf));
2707
2708 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2709 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2710}
2711
2712inline_size void
2713check_2625 (EV_P)
2714{
2715 /* kernels < 2.6.25 are borked
2716 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2717 */
2718 struct utsname buf;
2719 int major, minor, micro;
2720
2721 if (uname (&buf))
2722 return;
2723
2724 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2725 return;
2726
2727 if (major < 2
2728 || (major == 2 && minor < 6)
2729 || (major == 2 && minor == 6 && micro < 25))
2730 return;
2731
2732 fs_2625 = 1;
2733}
2734
2735inline_size void
2736infy_init (EV_P)
2737{
2738 if (fs_fd != -2)
2739 return;
2740
2741 fs_fd = -1;
2742
2743 check_2625 (EV_A);
2744
2745 fs_fd = inotify_init ();
2746
2747 if (fs_fd >= 0)
2748 {
2749 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2750 ev_set_priority (&fs_w, EV_MAXPRI);
2751 ev_io_start (EV_A_ &fs_w);
2752 }
2753}
2754
2755inline_size void
2756infy_fork (EV_P)
2757{
2758 int slot;
2759
2760 if (fs_fd < 0)
2761 return;
2762
2763 close (fs_fd);
2764 fs_fd = inotify_init ();
2765
2766 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2767 {
2768 WL w_ = fs_hash [slot].head;
2769 fs_hash [slot].head = 0;
2770
2771 while (w_)
2772 {
2773 ev_stat *w = (ev_stat *)w_;
2774 w_ = w_->next; /* lets us add this watcher */
2775
2776 w->wd = -1;
2777
2778 if (fs_fd >= 0)
2779 infy_add (EV_A_ w); /* re-add, no matter what */
2780 else
2781 ev_timer_again (EV_A_ &w->timer);
2782 }
2783 }
2784}
2785
2786#endif
2787
2788#ifdef _WIN32
2789# define EV_LSTAT(p,b) _stati64 (p, b)
2790#else
2791# define EV_LSTAT(p,b) lstat (p, b)
2792#endif
2793
2794void
2795ev_stat_stat (EV_P_ ev_stat *w)
2796{
2797 if (lstat (w->path, &w->attr) < 0)
2798 w->attr.st_nlink = 0;
2799 else if (!w->attr.st_nlink)
2800 w->attr.st_nlink = 1;
2801}
2802
2803static void noinline
2804stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2805{
2806 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2807
2808 /* we copy this here each the time so that */
2809 /* prev has the old value when the callback gets invoked */
2810 w->prev = w->attr;
2811 ev_stat_stat (EV_A_ w);
2812
2813 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2814 if (
2815 w->prev.st_dev != w->attr.st_dev
2816 || w->prev.st_ino != w->attr.st_ino
2817 || w->prev.st_mode != w->attr.st_mode
2818 || w->prev.st_nlink != w->attr.st_nlink
2819 || w->prev.st_uid != w->attr.st_uid
2820 || w->prev.st_gid != w->attr.st_gid
2821 || w->prev.st_rdev != w->attr.st_rdev
2822 || w->prev.st_size != w->attr.st_size
2823 || w->prev.st_atime != w->attr.st_atime
2824 || w->prev.st_mtime != w->attr.st_mtime
2825 || w->prev.st_ctime != w->attr.st_ctime
2826 ) {
2827 #if EV_USE_INOTIFY
2828 if (fs_fd >= 0)
2829 {
2830 infy_del (EV_A_ w);
2831 infy_add (EV_A_ w);
2832 ev_stat_stat (EV_A_ w); /* avoid race... */
2833 }
2834 #endif
2835
2836 ev_feed_event (EV_A_ w, EV_STAT);
2837 }
2838}
2839
2840void
2841ev_stat_start (EV_P_ ev_stat *w)
2842{
2843 if (expect_false (ev_is_active (w)))
2844 return;
2845
2846 ev_stat_stat (EV_A_ w);
2847
2848 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2849 w->interval = MIN_STAT_INTERVAL;
2850
2851 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2852 ev_set_priority (&w->timer, ev_priority (w));
2853
2854#if EV_USE_INOTIFY
2855 infy_init (EV_A);
2856
2857 if (fs_fd >= 0)
2858 infy_add (EV_A_ w);
2859 else
2860#endif
2861 ev_timer_again (EV_A_ &w->timer);
2862
2863 ev_start (EV_A_ (W)w, 1);
2864
2865 EV_FREQUENT_CHECK;
2866}
2867
2868void
2869ev_stat_stop (EV_P_ ev_stat *w)
2870{
2871 clear_pending (EV_A_ (W)w);
2872 if (expect_false (!ev_is_active (w)))
2873 return;
2874
2875 EV_FREQUENT_CHECK;
2876
2877#if EV_USE_INOTIFY
2878 infy_del (EV_A_ w);
2879#endif
2880 ev_timer_stop (EV_A_ &w->timer);
2881
2882 ev_stop (EV_A_ (W)w);
2883
2884 EV_FREQUENT_CHECK;
2885}
2886#endif
2887
2888#if EV_IDLE_ENABLE
2889void
2890ev_idle_start (EV_P_ ev_idle *w)
2891{
2892 if (expect_false (ev_is_active (w)))
2893 return;
2894
2895 pri_adjust (EV_A_ (W)w);
2896
2897 EV_FREQUENT_CHECK;
2898
2899 {
2900 int active = ++idlecnt [ABSPRI (w)];
2901
2902 ++idleall;
2903 ev_start (EV_A_ (W)w, active);
2904
2905 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2906 idles [ABSPRI (w)][active - 1] = w;
2907 }
2908
2909 EV_FREQUENT_CHECK;
2910}
2911
2912void
2913ev_idle_stop (EV_P_ ev_idle *w)
2914{
2915 clear_pending (EV_A_ (W)w);
2916 if (expect_false (!ev_is_active (w)))
2917 return;
2918
2919 EV_FREQUENT_CHECK;
2920
2921 {
2922 int active = ev_active (w);
2923
2924 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2925 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2926
2927 ev_stop (EV_A_ (W)w);
2928 --idleall;
2929 }
2930
2931 EV_FREQUENT_CHECK;
2932}
2933#endif
2934
2935void
2936ev_prepare_start (EV_P_ ev_prepare *w)
2937{
2938 if (expect_false (ev_is_active (w)))
2939 return;
2940
2941 EV_FREQUENT_CHECK;
2942
2943 ev_start (EV_A_ (W)w, ++preparecnt);
2944 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2945 prepares [preparecnt - 1] = w;
2946
2947 EV_FREQUENT_CHECK;
2948}
2949
2950void
2951ev_prepare_stop (EV_P_ ev_prepare *w)
2952{
2953 clear_pending (EV_A_ (W)w);
2954 if (expect_false (!ev_is_active (w)))
2955 return;
2956
2957 EV_FREQUENT_CHECK;
2958
2959 {
2960 int active = ev_active (w);
2961
2962 prepares [active - 1] = prepares [--preparecnt];
2963 ev_active (prepares [active - 1]) = active;
2964 }
2965
2966 ev_stop (EV_A_ (W)w);
2967
2968 EV_FREQUENT_CHECK;
2969}
2970
2971void
2972ev_check_start (EV_P_ ev_check *w)
2973{
2974 if (expect_false (ev_is_active (w)))
2975 return;
2976
2977 EV_FREQUENT_CHECK;
2978
772 ev_start ((W)w, ++checkcnt); 2979 ev_start (EV_A_ (W)w, ++checkcnt);
773 array_needsize (checks, checkmax, checkcnt, ); 2980 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
774 checks [checkcnt - 1] = w; 2981 checks [checkcnt - 1] = w;
775}
776 2982
2983 EV_FREQUENT_CHECK;
2984}
2985
2986void
777void evcheck_stop (struct ev_check *w) 2987ev_check_stop (EV_P_ ev_check *w)
778{ 2988{
2989 clear_pending (EV_A_ (W)w);
2990 if (expect_false (!ev_is_active (w)))
2991 return;
2992
2993 EV_FREQUENT_CHECK;
2994
2995 {
2996 int active = ev_active (w);
2997
779 checks [w->active - 1] = checks [--checkcnt]; 2998 checks [active - 1] = checks [--checkcnt];
2999 ev_active (checks [active - 1]) = active;
3000 }
3001
780 ev_stop ((W)w); 3002 ev_stop (EV_A_ (W)w);
3003
3004 EV_FREQUENT_CHECK;
781} 3005}
3006
3007#if EV_EMBED_ENABLE
3008void noinline
3009ev_embed_sweep (EV_P_ ev_embed *w)
3010{
3011 ev_loop (w->other, EVLOOP_NONBLOCK);
3012}
3013
3014static void
3015embed_io_cb (EV_P_ ev_io *io, int revents)
3016{
3017 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3018
3019 if (ev_cb (w))
3020 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3021 else
3022 ev_loop (w->other, EVLOOP_NONBLOCK);
3023}
3024
3025static void
3026embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3027{
3028 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3029
3030 {
3031 struct ev_loop *loop = w->other;
3032
3033 while (fdchangecnt)
3034 {
3035 fd_reify (EV_A);
3036 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3037 }
3038 }
3039}
3040
3041static void
3042embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3043{
3044 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3045
3046 ev_embed_stop (EV_A_ w);
3047
3048 {
3049 struct ev_loop *loop = w->other;
3050
3051 ev_loop_fork (EV_A);
3052 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3053 }
3054
3055 ev_embed_start (EV_A_ w);
3056}
3057
3058#if 0
3059static void
3060embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3061{
3062 ev_idle_stop (EV_A_ idle);
3063}
3064#endif
3065
3066void
3067ev_embed_start (EV_P_ ev_embed *w)
3068{
3069 if (expect_false (ev_is_active (w)))
3070 return;
3071
3072 {
3073 struct ev_loop *loop = w->other;
3074 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3075 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3076 }
3077
3078 EV_FREQUENT_CHECK;
3079
3080 ev_set_priority (&w->io, ev_priority (w));
3081 ev_io_start (EV_A_ &w->io);
3082
3083 ev_prepare_init (&w->prepare, embed_prepare_cb);
3084 ev_set_priority (&w->prepare, EV_MINPRI);
3085 ev_prepare_start (EV_A_ &w->prepare);
3086
3087 ev_fork_init (&w->fork, embed_fork_cb);
3088 ev_fork_start (EV_A_ &w->fork);
3089
3090 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3091
3092 ev_start (EV_A_ (W)w, 1);
3093
3094 EV_FREQUENT_CHECK;
3095}
3096
3097void
3098ev_embed_stop (EV_P_ ev_embed *w)
3099{
3100 clear_pending (EV_A_ (W)w);
3101 if (expect_false (!ev_is_active (w)))
3102 return;
3103
3104 EV_FREQUENT_CHECK;
3105
3106 ev_io_stop (EV_A_ &w->io);
3107 ev_prepare_stop (EV_A_ &w->prepare);
3108 ev_fork_stop (EV_A_ &w->fork);
3109
3110 EV_FREQUENT_CHECK;
3111}
3112#endif
3113
3114#if EV_FORK_ENABLE
3115void
3116ev_fork_start (EV_P_ ev_fork *w)
3117{
3118 if (expect_false (ev_is_active (w)))
3119 return;
3120
3121 EV_FREQUENT_CHECK;
3122
3123 ev_start (EV_A_ (W)w, ++forkcnt);
3124 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3125 forks [forkcnt - 1] = w;
3126
3127 EV_FREQUENT_CHECK;
3128}
3129
3130void
3131ev_fork_stop (EV_P_ ev_fork *w)
3132{
3133 clear_pending (EV_A_ (W)w);
3134 if (expect_false (!ev_is_active (w)))
3135 return;
3136
3137 EV_FREQUENT_CHECK;
3138
3139 {
3140 int active = ev_active (w);
3141
3142 forks [active - 1] = forks [--forkcnt];
3143 ev_active (forks [active - 1]) = active;
3144 }
3145
3146 ev_stop (EV_A_ (W)w);
3147
3148 EV_FREQUENT_CHECK;
3149}
3150#endif
3151
3152#if EV_ASYNC_ENABLE
3153void
3154ev_async_start (EV_P_ ev_async *w)
3155{
3156 if (expect_false (ev_is_active (w)))
3157 return;
3158
3159 evpipe_init (EV_A);
3160
3161 EV_FREQUENT_CHECK;
3162
3163 ev_start (EV_A_ (W)w, ++asynccnt);
3164 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3165 asyncs [asynccnt - 1] = w;
3166
3167 EV_FREQUENT_CHECK;
3168}
3169
3170void
3171ev_async_stop (EV_P_ ev_async *w)
3172{
3173 clear_pending (EV_A_ (W)w);
3174 if (expect_false (!ev_is_active (w)))
3175 return;
3176
3177 EV_FREQUENT_CHECK;
3178
3179 {
3180 int active = ev_active (w);
3181
3182 asyncs [active - 1] = asyncs [--asynccnt];
3183 ev_active (asyncs [active - 1]) = active;
3184 }
3185
3186 ev_stop (EV_A_ (W)w);
3187
3188 EV_FREQUENT_CHECK;
3189}
3190
3191void
3192ev_async_send (EV_P_ ev_async *w)
3193{
3194 w->sent = 1;
3195 evpipe_write (EV_A_ &gotasync);
3196}
3197#endif
782 3198
783/*****************************************************************************/ 3199/*****************************************************************************/
784 3200
785#if 0 3201struct ev_once
786 3202{
787struct ev_io wio; 3203 ev_io io;
3204 ev_timer to;
3205 void (*cb)(int revents, void *arg);
3206 void *arg;
3207};
788 3208
789static void 3209static void
790sin_cb (struct ev_io *w, int revents) 3210once_cb (EV_P_ struct ev_once *once, int revents)
791{ 3211{
792 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 3212 void (*cb)(int revents, void *arg) = once->cb;
3213 void *arg = once->arg;
3214
3215 ev_io_stop (EV_A_ &once->io);
3216 ev_timer_stop (EV_A_ &once->to);
3217 ev_free (once);
3218
3219 cb (revents, arg);
793} 3220}
794 3221
795static void 3222static void
796ocb (struct ev_timer *w, int revents) 3223once_cb_io (EV_P_ ev_io *w, int revents)
797{ 3224{
798 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 3225 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
799 evtimer_stop (w); 3226
800 evtimer_start (w); 3227 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
801} 3228}
802 3229
803static void 3230static void
804scb (struct ev_signal *w, int revents) 3231once_cb_to (EV_P_ ev_timer *w, int revents)
805{ 3232{
806 fprintf (stderr, "signal %x,%d\n", revents, w->signum); 3233 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
807 evio_stop (&wio);
808 evio_start (&wio);
809}
810 3234
811static void 3235 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
812gcb (struct ev_signal *w, int revents)
813{
814 fprintf (stderr, "generic %x\n", revents);
815
816} 3236}
817 3237
818int main (void) 3238void
3239ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
819{ 3240{
820 ev_init (0); 3241 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
821 3242
822 evio_init (&wio, sin_cb, 0, EV_READ); 3243 if (expect_false (!once))
823 evio_start (&wio); 3244 {
3245 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
3246 return;
3247 }
824 3248
825 struct ev_timer t[10000]; 3249 once->cb = cb;
3250 once->arg = arg;
826 3251
827#if 0 3252 ev_init (&once->io, once_cb_io);
3253 if (fd >= 0)
3254 {
3255 ev_io_set (&once->io, fd, events);
3256 ev_io_start (EV_A_ &once->io);
3257 }
3258
3259 ev_init (&once->to, once_cb_to);
3260 if (timeout >= 0.)
3261 {
3262 ev_timer_set (&once->to, timeout, 0.);
3263 ev_timer_start (EV_A_ &once->to);
3264 }
3265}
3266
3267/*****************************************************************************/
3268
3269#if EV_WALK_ENABLE
3270void
3271ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3272{
828 int i; 3273 int i, j;
3274 ev_watcher_list *wl, *wn;
3275
3276 if (types & (EV_IO | EV_EMBED))
829 for (i = 0; i < 10000; ++i) 3277 for (i = 0; i < anfdmax; ++i)
830 { 3278 for (wl = anfds [i].head; wl; )
831 struct ev_timer *w = t + i; 3279 {
832 evw_init (w, ocb, i); 3280 wn = wl->next;
833 evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
834 evtimer_start (w);
835 if (drand48 () < 0.5)
836 evtimer_stop (w);
837 }
838#endif
839 3281
840 struct ev_timer t1; 3282#if EV_EMBED_ENABLE
841 evtimer_init (&t1, ocb, 5, 10); 3283 if (ev_cb ((ev_io *)wl) == embed_io_cb)
842 evtimer_start (&t1); 3284 {
843 3285 if (types & EV_EMBED)
844 struct ev_signal sig; 3286 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
845 evsignal_init (&sig, scb, SIGQUIT); 3287 }
846 evsignal_start (&sig); 3288 else
847
848 struct ev_check cw;
849 evcheck_init (&cw, gcb);
850 evcheck_start (&cw);
851
852 struct ev_idle iw;
853 evidle_init (&iw, gcb);
854 evidle_start (&iw);
855
856 ev_loop (0);
857
858 return 0;
859}
860
861#endif 3289#endif
3290#if EV_USE_INOTIFY
3291 if (ev_cb ((ev_io *)wl) == infy_cb)
3292 ;
3293 else
3294#endif
3295 if ((ev_io *)wl != &pipe_w)
3296 if (types & EV_IO)
3297 cb (EV_A_ EV_IO, wl);
862 3298
3299 wl = wn;
3300 }
863 3301
3302 if (types & (EV_TIMER | EV_STAT))
3303 for (i = timercnt + HEAP0; i-- > HEAP0; )
3304#if EV_STAT_ENABLE
3305 /*TODO: timer is not always active*/
3306 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3307 {
3308 if (types & EV_STAT)
3309 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3310 }
3311 else
3312#endif
3313 if (types & EV_TIMER)
3314 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
864 3315
3316#if EV_PERIODIC_ENABLE
3317 if (types & EV_PERIODIC)
3318 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3319 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3320#endif
865 3321
3322#if EV_IDLE_ENABLE
3323 if (types & EV_IDLE)
3324 for (j = NUMPRI; i--; )
3325 for (i = idlecnt [j]; i--; )
3326 cb (EV_A_ EV_IDLE, idles [j][i]);
3327#endif
3328
3329#if EV_FORK_ENABLE
3330 if (types & EV_FORK)
3331 for (i = forkcnt; i--; )
3332 if (ev_cb (forks [i]) != embed_fork_cb)
3333 cb (EV_A_ EV_FORK, forks [i]);
3334#endif
3335
3336#if EV_ASYNC_ENABLE
3337 if (types & EV_ASYNC)
3338 for (i = asynccnt; i--; )
3339 cb (EV_A_ EV_ASYNC, asyncs [i]);
3340#endif
3341
3342 if (types & EV_PREPARE)
3343 for (i = preparecnt; i--; )
3344#if EV_EMBED_ENABLE
3345 if (ev_cb (prepares [i]) != embed_prepare_cb)
3346#endif
3347 cb (EV_A_ EV_PREPARE, prepares [i]);
3348
3349 if (types & EV_CHECK)
3350 for (i = checkcnt; i--; )
3351 cb (EV_A_ EV_CHECK, checks [i]);
3352
3353 if (types & EV_SIGNAL)
3354 for (i = 0; i < signalmax; ++i)
3355 for (wl = signals [i].head; wl; )
3356 {
3357 wn = wl->next;
3358 cb (EV_A_ EV_SIGNAL, wl);
3359 wl = wn;
3360 }
3361
3362 if (types & EV_CHILD)
3363 for (i = EV_PID_HASHSIZE; i--; )
3364 for (wl = childs [i]; wl; )
3365 {
3366 wn = wl->next;
3367 cb (EV_A_ EV_CHILD, wl);
3368 wl = wn;
3369 }
3370/* EV_STAT 0x00001000 /* stat data changed */
3371/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3372}
3373#endif
3374
3375#if EV_MULTIPLICITY
3376 #include "ev_wrap.h"
3377#endif
3378
3379#ifdef __cplusplus
3380}
3381#endif
3382

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