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Comparing libev/ev.c (file contents):
Revision 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs.
Revision 1.274 by root, Thu Nov 20 00:35:10 2008 UTC

1/* 1/*
2 * libev event processing core, watcher management
3 *
2 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
3 * All rights reserved. 5 * All rights reserved.
4 * 6 *
5 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
6 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
7 * 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.
8 * 27 *
9 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
10 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
11 * 30 * in which case the provisions of the GPL are applicable instead of
12 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
13 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
14 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
15 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
16 * 35 * and other provisions required by the GPL. If you do not delete the
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */ 38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 0
57# endif
58# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1
60# endif
61# endif
62# endif
63
64# if HAVE_CLOCK_GETTIME
65# ifndef EV_USE_MONOTONIC
66# define EV_USE_MONOTONIC 1
67# endif
68# ifndef EV_USE_REALTIME
69# define EV_USE_REALTIME 1
70# endif
71# else
72# ifndef EV_USE_MONOTONIC
73# define EV_USE_MONOTONIC 0
74# endif
75# ifndef EV_USE_REALTIME
76# define EV_USE_REALTIME 0
77# endif
78# endif
79
80# ifndef EV_USE_NANOSLEEP
81# if HAVE_NANOSLEEP
82# define EV_USE_NANOSLEEP 1
83# else
84# define EV_USE_NANOSLEEP 0
85# endif
86# endif
87
88# ifndef EV_USE_SELECT
89# if HAVE_SELECT && HAVE_SYS_SELECT_H
90# define EV_USE_SELECT 1
91# else
92# define EV_USE_SELECT 0
93# endif
94# endif
95
96# ifndef EV_USE_POLL
97# if HAVE_POLL && HAVE_POLL_H
98# define EV_USE_POLL 1
99# else
100# define EV_USE_POLL 0
101# endif
102# endif
103
104# ifndef EV_USE_EPOLL
105# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
106# define EV_USE_EPOLL 1
107# else
108# define EV_USE_EPOLL 0
109# endif
110# endif
111
112# ifndef EV_USE_KQUEUE
113# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
114# define EV_USE_KQUEUE 1
115# else
116# define EV_USE_KQUEUE 0
117# endif
118# endif
119
120# ifndef EV_USE_PORT
121# if HAVE_PORT_H && HAVE_PORT_CREATE
122# define EV_USE_PORT 1
123# else
124# define EV_USE_PORT 0
125# endif
126# endif
127
128# ifndef EV_USE_INOTIFY
129# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
130# define EV_USE_INOTIFY 1
131# else
132# define EV_USE_INOTIFY 0
133# endif
134# endif
135
136# ifndef EV_USE_EVENTFD
137# if HAVE_EVENTFD
138# define EV_USE_EVENTFD 1
139# else
140# define EV_USE_EVENTFD 0
141# endif
142# endif
143
144#endif
29 145
30#include <math.h> 146#include <math.h>
31#include <stdlib.h> 147#include <stdlib.h>
32#include <unistd.h>
33#include <fcntl.h> 148#include <fcntl.h>
34#include <signal.h>
35#include <stddef.h> 149#include <stddef.h>
36 150
37#include <stdio.h> 151#include <stdio.h>
38 152
39#include <assert.h> 153#include <assert.h>
40#include <errno.h> 154#include <errno.h>
41#include <sys/time.h> 155#include <sys/types.h>
42#include <time.h> 156#include <time.h>
43 157
44#ifndef HAVE_MONOTONIC 158#include <signal.h>
45# ifdef CLOCK_MONOTONIC 159
46# define HAVE_MONOTONIC 1 160#ifdef EV_H
161# include EV_H
162#else
163# include "ev.h"
164#endif
165
166#ifndef _WIN32
167# include <sys/time.h>
168# include <sys/wait.h>
169# include <unistd.h>
170#else
171# include <io.h>
172# define WIN32_LEAN_AND_MEAN
173# include <windows.h>
174# ifndef EV_SELECT_IS_WINSOCKET
175# define EV_SELECT_IS_WINSOCKET 1
47# endif 176# endif
48#endif 177#endif
49 178
50#ifndef HAVE_SELECT 179/* this block tries to deduce configuration from header-defined symbols and defaults */
51# define HAVE_SELECT 1 180
181#ifndef EV_USE_CLOCK_SYSCALL
182# if __linux && __GLIBC__ >= 2
183# define EV_USE_CLOCK_SYSCALL 1
184# else
185# define EV_USE_CLOCK_SYSCALL 0
52#endif 186# endif
187#endif
53 188
54#ifndef HAVE_EPOLL 189#ifndef EV_USE_MONOTONIC
55# define HAVE_EPOLL 0 190# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
191# define EV_USE_MONOTONIC 1
192# else
193# define EV_USE_MONOTONIC 0
56#endif 194# endif
195#endif
57 196
58#ifndef HAVE_REALTIME 197#ifndef EV_USE_REALTIME
59# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ 198# define EV_USE_REALTIME 0
199#endif
200
201#ifndef EV_USE_NANOSLEEP
202# if _POSIX_C_SOURCE >= 199309L
203# define EV_USE_NANOSLEEP 1
204# else
205# define EV_USE_NANOSLEEP 0
60#endif 206# endif
207#endif
208
209#ifndef EV_USE_SELECT
210# define EV_USE_SELECT 1
211#endif
212
213#ifndef EV_USE_POLL
214# ifdef _WIN32
215# define EV_USE_POLL 0
216# else
217# define EV_USE_POLL 1
218# endif
219#endif
220
221#ifndef EV_USE_EPOLL
222# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
223# define EV_USE_EPOLL 1
224# else
225# define EV_USE_EPOLL 0
226# endif
227#endif
228
229#ifndef EV_USE_KQUEUE
230# define EV_USE_KQUEUE 0
231#endif
232
233#ifndef EV_USE_PORT
234# define EV_USE_PORT 0
235#endif
236
237#ifndef EV_USE_INOTIFY
238# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
239# define EV_USE_INOTIFY 1
240# else
241# define EV_USE_INOTIFY 0
242# endif
243#endif
244
245#ifndef EV_PID_HASHSIZE
246# if EV_MINIMAL
247# define EV_PID_HASHSIZE 1
248# else
249# define EV_PID_HASHSIZE 16
250# endif
251#endif
252
253#ifndef EV_INOTIFY_HASHSIZE
254# if EV_MINIMAL
255# define EV_INOTIFY_HASHSIZE 1
256# else
257# define EV_INOTIFY_HASHSIZE 16
258# endif
259#endif
260
261#ifndef EV_USE_EVENTFD
262# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
263# define EV_USE_EVENTFD 1
264# else
265# define EV_USE_EVENTFD 0
266# endif
267#endif
268
269#if 0 /* debugging */
270# define EV_VERIFY 3
271# define EV_USE_4HEAP 1
272# define EV_HEAP_CACHE_AT 1
273#endif
274
275#ifndef EV_VERIFY
276# define EV_VERIFY !EV_MINIMAL
277#endif
278
279#ifndef EV_USE_4HEAP
280# define EV_USE_4HEAP !EV_MINIMAL
281#endif
282
283#ifndef EV_HEAP_CACHE_AT
284# define EV_HEAP_CACHE_AT !EV_MINIMAL
285#endif
286
287/* this block fixes any misconfiguration where we know we run into trouble otherwise */
288
289#ifndef CLOCK_MONOTONIC
290# undef EV_USE_MONOTONIC
291# define EV_USE_MONOTONIC 0
292#endif
293
294#ifndef CLOCK_REALTIME
295# undef EV_USE_REALTIME
296# define EV_USE_REALTIME 0
297#endif
298
299#if !EV_STAT_ENABLE
300# undef EV_USE_INOTIFY
301# define EV_USE_INOTIFY 0
302#endif
303
304#if !EV_USE_NANOSLEEP
305# ifndef _WIN32
306# include <sys/select.h>
307# endif
308#endif
309
310#if EV_USE_INOTIFY
311# include <sys/utsname.h>
312# include <sys/statfs.h>
313# include <sys/inotify.h>
314/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
315# ifndef IN_DONT_FOLLOW
316# undef EV_USE_INOTIFY
317# define EV_USE_INOTIFY 0
318# endif
319#endif
320
321#if EV_SELECT_IS_WINSOCKET
322# include <winsock.h>
323#endif
324
325/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
326/* which makes programs even slower. might work on other unices, too. */
327#if EV_USE_CLOCK_SYSCALL
328# include <syscall.h>
329# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
330# undef EV_USE_MONOTONIC
331# define EV_USE_MONOTONIC 1
332#endif
333
334#if EV_USE_EVENTFD
335/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
336# include <stdint.h>
337# ifdef __cplusplus
338extern "C" {
339# endif
340int eventfd (unsigned int initval, int flags);
341# ifdef __cplusplus
342}
343# endif
344#endif
345
346/**/
347
348#if EV_VERIFY >= 3
349# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
350#else
351# define EV_FREQUENT_CHECK do { } while (0)
352#endif
353
354/*
355 * This is used to avoid floating point rounding problems.
356 * It is added to ev_rt_now when scheduling periodics
357 * to ensure progress, time-wise, even when rounding
358 * errors are against us.
359 * This value is good at least till the year 4000.
360 * Better solutions welcome.
361 */
362#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
61 363
62#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 364#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
63#define MAX_BLOCKTIME 60. 365#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
366/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
64 367
65#include "ev.h" 368#if __GNUC__ >= 4
369# define expect(expr,value) __builtin_expect ((expr),(value))
370# define noinline __attribute__ ((noinline))
371#else
372# define expect(expr,value) (expr)
373# define noinline
374# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
375# define inline
376# endif
377#endif
66 378
379#define expect_false(expr) expect ((expr) != 0, 0)
380#define expect_true(expr) expect ((expr) != 0, 1)
381#define inline_size static inline
382
383#if EV_MINIMAL
384# define inline_speed static noinline
385#else
386# define inline_speed static inline
387#endif
388
389#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
390#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
391
392#define EMPTY /* required for microsofts broken pseudo-c compiler */
393#define EMPTY2(a,b) /* used to suppress some warnings */
394
67typedef struct ev_watcher *W; 395typedef ev_watcher *W;
68typedef struct ev_watcher_list *WL; 396typedef ev_watcher_list *WL;
69typedef struct ev_watcher_time *WT; 397typedef ev_watcher_time *WT;
70 398
71static ev_tstamp now, diff; /* monotonic clock */ 399#define ev_active(w) ((W)(w))->active
400#define ev_at(w) ((WT)(w))->at
401
402#if EV_USE_MONOTONIC
403/* sig_atomic_t is used to avoid per-thread variables or locking but still */
404/* giving it a reasonably high chance of working on typical architetcures */
405static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
406#endif
407
408#ifdef _WIN32
409# include "ev_win32.c"
410#endif
411
412/*****************************************************************************/
413
414static void (*syserr_cb)(const char *msg);
415
416void
417ev_set_syserr_cb (void (*cb)(const char *msg))
418{
419 syserr_cb = cb;
420}
421
422static void noinline
423ev_syserr (const char *msg)
424{
425 if (!msg)
426 msg = "(libev) system error";
427
428 if (syserr_cb)
429 syserr_cb (msg);
430 else
431 {
432 perror (msg);
433 abort ();
434 }
435}
436
437static void *
438ev_realloc_emul (void *ptr, long size)
439{
440 /* some systems, notably openbsd and darwin, fail to properly
441 * implement realloc (x, 0) (as required by both ansi c-98 and
442 * the single unix specification, so work around them here.
443 */
444
445 if (size)
446 return realloc (ptr, size);
447
448 free (ptr);
449 return 0;
450}
451
452static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
453
454void
455ev_set_allocator (void *(*cb)(void *ptr, long size))
456{
457 alloc = cb;
458}
459
460inline_speed void *
461ev_realloc (void *ptr, long size)
462{
463 ptr = alloc (ptr, size);
464
465 if (!ptr && size)
466 {
467 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
468 abort ();
469 }
470
471 return ptr;
472}
473
474#define ev_malloc(size) ev_realloc (0, (size))
475#define ev_free(ptr) ev_realloc ((ptr), 0)
476
477/*****************************************************************************/
478
479typedef struct
480{
481 WL head;
482 unsigned char events;
483 unsigned char reify;
484 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
485 unsigned char unused;
486#if EV_USE_EPOLL
487 unsigned int egen; /* generation counter to counter epoll bugs */
488#endif
489#if EV_SELECT_IS_WINSOCKET
490 SOCKET handle;
491#endif
492} ANFD;
493
494typedef struct
495{
496 W w;
497 int events;
498} ANPENDING;
499
500#if EV_USE_INOTIFY
501/* hash table entry per inotify-id */
502typedef struct
503{
504 WL head;
505} ANFS;
506#endif
507
508/* Heap Entry */
509#if EV_HEAP_CACHE_AT
510 typedef struct {
511 ev_tstamp at;
512 WT w;
513 } ANHE;
514
515 #define ANHE_w(he) (he).w /* access watcher, read-write */
516 #define ANHE_at(he) (he).at /* access cached at, read-only */
517 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
518#else
519 typedef WT ANHE;
520
521 #define ANHE_w(he) (he)
522 #define ANHE_at(he) (he)->at
523 #define ANHE_at_cache(he)
524#endif
525
526#if EV_MULTIPLICITY
527
528 struct ev_loop
529 {
530 ev_tstamp ev_rt_now;
531 #define ev_rt_now ((loop)->ev_rt_now)
532 #define VAR(name,decl) decl;
533 #include "ev_vars.h"
534 #undef VAR
535 };
536 #include "ev_wrap.h"
537
538 static struct ev_loop default_loop_struct;
539 struct ev_loop *ev_default_loop_ptr;
540
541#else
542
72ev_tstamp ev_now; 543 ev_tstamp ev_rt_now;
73int ev_method; 544 #define VAR(name,decl) static decl;
545 #include "ev_vars.h"
546 #undef VAR
74 547
75static int have_monotonic; /* runtime */ 548 static int ev_default_loop_ptr;
76 549
77static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 550#endif
78static void (*method_modify)(int fd, int oev, int nev);
79static void (*method_poll)(ev_tstamp timeout);
80 551
81/*****************************************************************************/ 552/*****************************************************************************/
82 553
83ev_tstamp 554ev_tstamp
84ev_time (void) 555ev_time (void)
85{ 556{
86#if HAVE_REALTIME 557#if EV_USE_REALTIME
87 struct timespec ts; 558 struct timespec ts;
88 clock_gettime (CLOCK_REALTIME, &ts); 559 clock_gettime (CLOCK_REALTIME, &ts);
89 return ts.tv_sec + ts.tv_nsec * 1e-9; 560 return ts.tv_sec + ts.tv_nsec * 1e-9;
90#else 561#else
91 struct timeval tv; 562 struct timeval tv;
92 gettimeofday (&tv, 0); 563 gettimeofday (&tv, 0);
93 return tv.tv_sec + tv.tv_usec * 1e-6; 564 return tv.tv_sec + tv.tv_usec * 1e-6;
94#endif 565#endif
95} 566}
96 567
97static ev_tstamp 568ev_tstamp inline_size
98get_clock (void) 569get_clock (void)
99{ 570{
100#if HAVE_MONOTONIC 571#if EV_USE_MONOTONIC
101 if (have_monotonic) 572 if (expect_true (have_monotonic))
102 { 573 {
103 struct timespec ts; 574 struct timespec ts;
104 clock_gettime (CLOCK_MONOTONIC, &ts); 575 clock_gettime (CLOCK_MONOTONIC, &ts);
105 return ts.tv_sec + ts.tv_nsec * 1e-9; 576 return ts.tv_sec + ts.tv_nsec * 1e-9;
106 } 577 }
107#endif 578#endif
108 579
109 return ev_time (); 580 return ev_time ();
110} 581}
111 582
112#define array_needsize(base,cur,cnt,init) \ 583#if EV_MULTIPLICITY
113 if ((cnt) > cur) \ 584ev_tstamp
114 { \ 585ev_now (EV_P)
115 int newcnt = cur ? cur << 1 : 16; \ 586{
116 base = realloc (base, sizeof (*base) * (newcnt)); \ 587 return ev_rt_now;
117 init (base + cur, newcnt - cur); \ 588}
118 cur = newcnt; \ 589#endif
590
591void
592ev_sleep (ev_tstamp delay)
593{
594 if (delay > 0.)
119 } 595 {
596#if EV_USE_NANOSLEEP
597 struct timespec ts;
598
599 ts.tv_sec = (time_t)delay;
600 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
601
602 nanosleep (&ts, 0);
603#elif defined(_WIN32)
604 Sleep ((unsigned long)(delay * 1e3));
605#else
606 struct timeval tv;
607
608 tv.tv_sec = (time_t)delay;
609 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
610
611 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
612 /* somehting nto guaranteed by newer posix versions, but guaranteed */
613 /* by older ones */
614 select (0, 0, 0, 0, &tv);
615#endif
616 }
617}
120 618
121/*****************************************************************************/ 619/*****************************************************************************/
122 620
621#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
622
623int inline_size
624array_nextsize (int elem, int cur, int cnt)
625{
626 int ncur = cur + 1;
627
628 do
629 ncur <<= 1;
630 while (cnt > ncur);
631
632 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
633 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
634 {
635 ncur *= elem;
636 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
637 ncur = ncur - sizeof (void *) * 4;
638 ncur /= elem;
639 }
640
641 return ncur;
642}
643
644static noinline void *
645array_realloc (int elem, void *base, int *cur, int cnt)
646{
647 *cur = array_nextsize (elem, *cur, cnt);
648 return ev_realloc (base, elem * *cur);
649}
650
651#define array_init_zero(base,count) \
652 memset ((void *)(base), 0, sizeof (*(base)) * (count))
653
654#define array_needsize(type,base,cur,cnt,init) \
655 if (expect_false ((cnt) > (cur))) \
656 { \
657 int ocur_ = (cur); \
658 (base) = (type *)array_realloc \
659 (sizeof (type), (base), &(cur), (cnt)); \
660 init ((base) + (ocur_), (cur) - ocur_); \
661 }
662
663#if 0
664#define array_slim(type,stem) \
665 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
666 { \
667 stem ## max = array_roundsize (stem ## cnt >> 1); \
668 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
669 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
670 }
671#endif
672
673#define array_free(stem, idx) \
674 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
675
676/*****************************************************************************/
677
678void noinline
679ev_feed_event (EV_P_ void *w, int revents)
680{
681 W w_ = (W)w;
682 int pri = ABSPRI (w_);
683
684 if (expect_false (w_->pending))
685 pendings [pri][w_->pending - 1].events |= revents;
686 else
687 {
688 w_->pending = ++pendingcnt [pri];
689 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
690 pendings [pri][w_->pending - 1].w = w_;
691 pendings [pri][w_->pending - 1].events = revents;
692 }
693}
694
695void inline_speed
696queue_events (EV_P_ W *events, int eventcnt, int type)
697{
698 int i;
699
700 for (i = 0; i < eventcnt; ++i)
701 ev_feed_event (EV_A_ events [i], type);
702}
703
704/*****************************************************************************/
705
706void inline_speed
707fd_event (EV_P_ int fd, int revents)
708{
709 ANFD *anfd = anfds + fd;
710 ev_io *w;
711
712 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
713 {
714 int ev = w->events & revents;
715
716 if (ev)
717 ev_feed_event (EV_A_ (W)w, ev);
718 }
719}
720
721void
722ev_feed_fd_event (EV_P_ int fd, int revents)
723{
724 if (fd >= 0 && fd < anfdmax)
725 fd_event (EV_A_ fd, revents);
726}
727
728void inline_size
729fd_reify (EV_P)
730{
731 int i;
732
733 for (i = 0; i < fdchangecnt; ++i)
734 {
735 int fd = fdchanges [i];
736 ANFD *anfd = anfds + fd;
737 ev_io *w;
738
739 unsigned char events = 0;
740
741 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
742 events |= (unsigned char)w->events;
743
744#if EV_SELECT_IS_WINSOCKET
745 if (events)
746 {
747 unsigned long arg;
748 #ifdef EV_FD_TO_WIN32_HANDLE
749 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
750 #else
751 anfd->handle = _get_osfhandle (fd);
752 #endif
753 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
754 }
755#endif
756
757 {
758 unsigned char o_events = anfd->events;
759 unsigned char o_reify = anfd->reify;
760
761 anfd->reify = 0;
762 anfd->events = events;
763
764 if (o_events != events || o_reify & EV_IOFDSET)
765 backend_modify (EV_A_ fd, o_events, events);
766 }
767 }
768
769 fdchangecnt = 0;
770}
771
772void inline_size
773fd_change (EV_P_ int fd, int flags)
774{
775 unsigned char reify = anfds [fd].reify;
776 anfds [fd].reify |= flags;
777
778 if (expect_true (!reify))
779 {
780 ++fdchangecnt;
781 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
782 fdchanges [fdchangecnt - 1] = fd;
783 }
784}
785
786void inline_speed
787fd_kill (EV_P_ int fd)
788{
789 ev_io *w;
790
791 while ((w = (ev_io *)anfds [fd].head))
792 {
793 ev_io_stop (EV_A_ w);
794 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
795 }
796}
797
798int inline_size
799fd_valid (int fd)
800{
801#ifdef _WIN32
802 return _get_osfhandle (fd) != -1;
803#else
804 return fcntl (fd, F_GETFD) != -1;
805#endif
806}
807
808/* called on EBADF to verify fds */
809static void noinline
810fd_ebadf (EV_P)
811{
812 int fd;
813
814 for (fd = 0; fd < anfdmax; ++fd)
815 if (anfds [fd].events)
816 if (!fd_valid (fd) && errno == EBADF)
817 fd_kill (EV_A_ fd);
818}
819
820/* called on ENOMEM in select/poll to kill some fds and retry */
821static void noinline
822fd_enomem (EV_P)
823{
824 int fd;
825
826 for (fd = anfdmax; fd--; )
827 if (anfds [fd].events)
828 {
829 fd_kill (EV_A_ fd);
830 return;
831 }
832}
833
834/* usually called after fork if backend needs to re-arm all fds from scratch */
835static void noinline
836fd_rearm_all (EV_P)
837{
838 int fd;
839
840 for (fd = 0; fd < anfdmax; ++fd)
841 if (anfds [fd].events)
842 {
843 anfds [fd].events = 0;
844 anfds [fd].emask = 0;
845 fd_change (EV_A_ fd, EV_IOFDSET | 1);
846 }
847}
848
849/*****************************************************************************/
850
851/*
852 * the heap functions want a real array index. array index 0 uis guaranteed to not
853 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
854 * the branching factor of the d-tree.
855 */
856
857/*
858 * at the moment we allow libev the luxury of two heaps,
859 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
860 * which is more cache-efficient.
861 * the difference is about 5% with 50000+ watchers.
862 */
863#if EV_USE_4HEAP
864
865#define DHEAP 4
866#define HEAP0 (DHEAP - 1) /* index of first element in heap */
867#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
868#define UPHEAP_DONE(p,k) ((p) == (k))
869
870/* away from the root */
871void inline_speed
872downheap (ANHE *heap, int N, int k)
873{
874 ANHE he = heap [k];
875 ANHE *E = heap + N + HEAP0;
876
877 for (;;)
878 {
879 ev_tstamp minat;
880 ANHE *minpos;
881 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
882
883 /* find minimum child */
884 if (expect_true (pos + DHEAP - 1 < E))
885 {
886 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
887 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
888 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
889 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
890 }
891 else if (pos < E)
892 {
893 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
894 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
895 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
896 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
897 }
898 else
899 break;
900
901 if (ANHE_at (he) <= minat)
902 break;
903
904 heap [k] = *minpos;
905 ev_active (ANHE_w (*minpos)) = k;
906
907 k = minpos - heap;
908 }
909
910 heap [k] = he;
911 ev_active (ANHE_w (he)) = k;
912}
913
914#else /* 4HEAP */
915
916#define HEAP0 1
917#define HPARENT(k) ((k) >> 1)
918#define UPHEAP_DONE(p,k) (!(p))
919
920/* away from the root */
921void inline_speed
922downheap (ANHE *heap, int N, int k)
923{
924 ANHE he = heap [k];
925
926 for (;;)
927 {
928 int c = k << 1;
929
930 if (c > N + HEAP0 - 1)
931 break;
932
933 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
934 ? 1 : 0;
935
936 if (ANHE_at (he) <= ANHE_at (heap [c]))
937 break;
938
939 heap [k] = heap [c];
940 ev_active (ANHE_w (heap [k])) = k;
941
942 k = c;
943 }
944
945 heap [k] = he;
946 ev_active (ANHE_w (he)) = k;
947}
948#endif
949
950/* towards the root */
951void inline_speed
952upheap (ANHE *heap, int k)
953{
954 ANHE he = heap [k];
955
956 for (;;)
957 {
958 int p = HPARENT (k);
959
960 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
961 break;
962
963 heap [k] = heap [p];
964 ev_active (ANHE_w (heap [k])) = k;
965 k = p;
966 }
967
968 heap [k] = he;
969 ev_active (ANHE_w (he)) = k;
970}
971
972void inline_size
973adjustheap (ANHE *heap, int N, int k)
974{
975 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
976 upheap (heap, k);
977 else
978 downheap (heap, N, k);
979}
980
981/* rebuild the heap: this function is used only once and executed rarely */
982void inline_size
983reheap (ANHE *heap, int N)
984{
985 int i;
986
987 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
988 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
989 for (i = 0; i < N; ++i)
990 upheap (heap, i + HEAP0);
991}
992
993/*****************************************************************************/
994
123typedef struct 995typedef struct
124{ 996{
125 struct ev_io *head; 997 WL head;
126 unsigned char wev, rev; /* want, received event set */ 998 EV_ATOMIC_T gotsig;
127} ANFD;
128
129static ANFD *anfds;
130static int anfdmax;
131
132static int *fdchanges;
133static int fdchangemax, fdchangecnt;
134
135static void
136anfds_init (ANFD *base, int count)
137{
138 while (count--)
139 {
140 base->head = 0;
141 base->wev = base->rev = EV_NONE;
142 ++base;
143 }
144}
145
146typedef struct
147{
148 W w;
149 int events;
150} ANPENDING;
151
152static ANPENDING *pendings;
153static int pendingmax, pendingcnt;
154
155static void
156event (W w, int events)
157{
158 if (w->active)
159 {
160 w->pending = ++pendingcnt;
161 array_needsize (pendings, pendingmax, pendingcnt, );
162 pendings [pendingcnt - 1].w = w;
163 pendings [pendingcnt - 1].events = events;
164 }
165}
166
167static void
168fd_event (int fd, int events)
169{
170 ANFD *anfd = anfds + fd;
171 struct ev_io *w;
172
173 for (w = anfd->head; w; w = w->next)
174 {
175 int ev = w->events & events;
176
177 if (ev)
178 event ((W)w, ev);
179 }
180}
181
182static void
183queue_events (W *events, int eventcnt, int type)
184{
185 int i;
186
187 for (i = 0; i < eventcnt; ++i)
188 event (events [i], type);
189}
190
191/* called on EBADF to verify fds */
192static void
193fd_recheck ()
194{
195 int fd;
196
197 for (fd = 0; fd < anfdmax; ++fd)
198 if (anfds [fd].wev)
199 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
200 while (anfds [fd].head)
201 evio_stop (anfds [fd].head);
202}
203
204/*****************************************************************************/
205
206static struct ev_timer **timers;
207static int timermax, timercnt;
208
209static struct ev_periodic **periodics;
210static int periodicmax, periodiccnt;
211
212static void
213upheap (WT *timers, int k)
214{
215 WT w = timers [k];
216
217 while (k && timers [k >> 1]->at > w->at)
218 {
219 timers [k] = timers [k >> 1];
220 timers [k]->active = k + 1;
221 k >>= 1;
222 }
223
224 timers [k] = w;
225 timers [k]->active = k + 1;
226
227}
228
229static void
230downheap (WT *timers, int N, int k)
231{
232 WT w = timers [k];
233
234 while (k < (N >> 1))
235 {
236 int j = k << 1;
237
238 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
239 ++j;
240
241 if (w->at <= timers [j]->at)
242 break;
243
244 timers [k] = timers [j];
245 timers [k]->active = k + 1;
246 k = j;
247 }
248
249 timers [k] = w;
250 timers [k]->active = k + 1;
251}
252
253/*****************************************************************************/
254
255typedef struct
256{
257 struct ev_signal *head;
258 sig_atomic_t gotsig;
259} ANSIG; 999} ANSIG;
260 1000
261static ANSIG *signals; 1001static ANSIG *signals;
262static int signalmax; 1002static int signalmax;
263 1003
264static int sigpipe [2]; 1004static EV_ATOMIC_T gotsig;
265static sig_atomic_t gotsig; 1005
266static struct ev_io sigev; 1006/*****************************************************************************/
1007
1008void inline_speed
1009fd_intern (int fd)
1010{
1011#ifdef _WIN32
1012 unsigned long arg = 1;
1013 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1014#else
1015 fcntl (fd, F_SETFD, FD_CLOEXEC);
1016 fcntl (fd, F_SETFL, O_NONBLOCK);
1017#endif
1018}
1019
1020static void noinline
1021evpipe_init (EV_P)
1022{
1023 if (!ev_is_active (&pipeev))
1024 {
1025#if EV_USE_EVENTFD
1026 if ((evfd = eventfd (0, 0)) >= 0)
1027 {
1028 evpipe [0] = -1;
1029 fd_intern (evfd);
1030 ev_io_set (&pipeev, evfd, EV_READ);
1031 }
1032 else
1033#endif
1034 {
1035 while (pipe (evpipe))
1036 ev_syserr ("(libev) error creating signal/async pipe");
1037
1038 fd_intern (evpipe [0]);
1039 fd_intern (evpipe [1]);
1040 ev_io_set (&pipeev, evpipe [0], EV_READ);
1041 }
1042
1043 ev_io_start (EV_A_ &pipeev);
1044 ev_unref (EV_A); /* watcher should not keep loop alive */
1045 }
1046}
1047
1048void inline_size
1049evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1050{
1051 if (!*flag)
1052 {
1053 int old_errno = errno; /* save errno because write might clobber it */
1054
1055 *flag = 1;
1056
1057#if EV_USE_EVENTFD
1058 if (evfd >= 0)
1059 {
1060 uint64_t counter = 1;
1061 write (evfd, &counter, sizeof (uint64_t));
1062 }
1063 else
1064#endif
1065 write (evpipe [1], &old_errno, 1);
1066
1067 errno = old_errno;
1068 }
1069}
267 1070
268static void 1071static void
269signals_init (ANSIG *base, int count) 1072pipecb (EV_P_ ev_io *iow, int revents)
270{ 1073{
271 while (count--) 1074#if EV_USE_EVENTFD
1075 if (evfd >= 0)
1076 {
1077 uint64_t counter;
1078 read (evfd, &counter, sizeof (uint64_t));
272 { 1079 }
273 base->head = 0; 1080 else
1081#endif
1082 {
1083 char dummy;
1084 read (evpipe [0], &dummy, 1);
1085 }
1086
1087 if (gotsig && ev_is_default_loop (EV_A))
1088 {
1089 int signum;
274 base->gotsig = 0; 1090 gotsig = 0;
275 ++base; 1091
1092 for (signum = signalmax; signum--; )
1093 if (signals [signum].gotsig)
1094 ev_feed_signal_event (EV_A_ signum + 1);
1095 }
1096
1097#if EV_ASYNC_ENABLE
1098 if (gotasync)
276 } 1099 {
1100 int i;
1101 gotasync = 0;
1102
1103 for (i = asynccnt; i--; )
1104 if (asyncs [i]->sent)
1105 {
1106 asyncs [i]->sent = 0;
1107 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1108 }
1109 }
1110#endif
277} 1111}
1112
1113/*****************************************************************************/
278 1114
279static void 1115static void
280sighandler (int signum) 1116ev_sighandler (int signum)
281{ 1117{
1118#if EV_MULTIPLICITY
1119 struct ev_loop *loop = &default_loop_struct;
1120#endif
1121
1122#if _WIN32
1123 signal (signum, ev_sighandler);
1124#endif
1125
282 signals [signum - 1].gotsig = 1; 1126 signals [signum - 1].gotsig = 1;
1127 evpipe_write (EV_A_ &gotsig);
1128}
283 1129
284 if (!gotsig) 1130void noinline
1131ev_feed_signal_event (EV_P_ int signum)
1132{
1133 WL w;
1134
1135#if EV_MULTIPLICITY
1136 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1137#endif
1138
1139 --signum;
1140
1141 if (signum < 0 || signum >= signalmax)
1142 return;
1143
1144 signals [signum].gotsig = 0;
1145
1146 for (w = signals [signum].head; w; w = w->next)
1147 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1148}
1149
1150/*****************************************************************************/
1151
1152static WL childs [EV_PID_HASHSIZE];
1153
1154#ifndef _WIN32
1155
1156static ev_signal childev;
1157
1158#ifndef WIFCONTINUED
1159# define WIFCONTINUED(status) 0
1160#endif
1161
1162void inline_speed
1163child_reap (EV_P_ int chain, int pid, int status)
1164{
1165 ev_child *w;
1166 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1167
1168 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1169 {
1170 if ((w->pid == pid || !w->pid)
1171 && (!traced || (w->flags & 1)))
1172 {
1173 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1174 w->rpid = pid;
1175 w->rstatus = status;
1176 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1177 }
1178 }
1179}
1180
1181#ifndef WCONTINUED
1182# define WCONTINUED 0
1183#endif
1184
1185static void
1186childcb (EV_P_ ev_signal *sw, int revents)
1187{
1188 int pid, status;
1189
1190 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1191 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1192 if (!WCONTINUED
1193 || errno != EINVAL
1194 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1195 return;
1196
1197 /* make sure we are called again until all children have been reaped */
1198 /* we need to do it this way so that the callback gets called before we continue */
1199 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1200
1201 child_reap (EV_A_ pid, pid, status);
1202 if (EV_PID_HASHSIZE > 1)
1203 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1204}
1205
1206#endif
1207
1208/*****************************************************************************/
1209
1210#if EV_USE_PORT
1211# include "ev_port.c"
1212#endif
1213#if EV_USE_KQUEUE
1214# include "ev_kqueue.c"
1215#endif
1216#if EV_USE_EPOLL
1217# include "ev_epoll.c"
1218#endif
1219#if EV_USE_POLL
1220# include "ev_poll.c"
1221#endif
1222#if EV_USE_SELECT
1223# include "ev_select.c"
1224#endif
1225
1226int
1227ev_version_major (void)
1228{
1229 return EV_VERSION_MAJOR;
1230}
1231
1232int
1233ev_version_minor (void)
1234{
1235 return EV_VERSION_MINOR;
1236}
1237
1238/* return true if we are running with elevated privileges and should ignore env variables */
1239int inline_size
1240enable_secure (void)
1241{
1242#ifdef _WIN32
1243 return 0;
1244#else
1245 return getuid () != geteuid ()
1246 || getgid () != getegid ();
1247#endif
1248}
1249
1250unsigned int
1251ev_supported_backends (void)
1252{
1253 unsigned int flags = 0;
1254
1255 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1256 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1257 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1258 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1259 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1260
1261 return flags;
1262}
1263
1264unsigned int
1265ev_recommended_backends (void)
1266{
1267 unsigned int flags = ev_supported_backends ();
1268
1269#ifndef __NetBSD__
1270 /* kqueue is borked on everything but netbsd apparently */
1271 /* it usually doesn't work correctly on anything but sockets and pipes */
1272 flags &= ~EVBACKEND_KQUEUE;
1273#endif
1274#ifdef __APPLE__
1275 // flags &= ~EVBACKEND_KQUEUE; for documentation
1276 flags &= ~EVBACKEND_POLL;
1277#endif
1278
1279 return flags;
1280}
1281
1282unsigned int
1283ev_embeddable_backends (void)
1284{
1285 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1286
1287 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1288 /* please fix it and tell me how to detect the fix */
1289 flags &= ~EVBACKEND_EPOLL;
1290
1291 return flags;
1292}
1293
1294unsigned int
1295ev_backend (EV_P)
1296{
1297 return backend;
1298}
1299
1300unsigned int
1301ev_loop_count (EV_P)
1302{
1303 return loop_count;
1304}
1305
1306void
1307ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1308{
1309 io_blocktime = interval;
1310}
1311
1312void
1313ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1314{
1315 timeout_blocktime = interval;
1316}
1317
1318static void noinline
1319loop_init (EV_P_ unsigned int flags)
1320{
1321 if (!backend)
1322 {
1323#if EV_USE_MONOTONIC
285 { 1324 {
1325 struct timespec ts;
1326 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1327 have_monotonic = 1;
1328 }
1329#endif
1330
1331 ev_rt_now = ev_time ();
1332 mn_now = get_clock ();
1333 now_floor = mn_now;
1334 rtmn_diff = ev_rt_now - mn_now;
1335
1336 io_blocktime = 0.;
1337 timeout_blocktime = 0.;
1338 backend = 0;
1339 backend_fd = -1;
1340 gotasync = 0;
1341#if EV_USE_INOTIFY
1342 fs_fd = -2;
1343#endif
1344
1345 /* pid check not overridable via env */
1346#ifndef _WIN32
1347 if (flags & EVFLAG_FORKCHECK)
1348 curpid = getpid ();
1349#endif
1350
1351 if (!(flags & EVFLAG_NOENV)
1352 && !enable_secure ()
1353 && getenv ("LIBEV_FLAGS"))
1354 flags = atoi (getenv ("LIBEV_FLAGS"));
1355
1356 if (!(flags & 0x0000ffffU))
1357 flags |= ev_recommended_backends ();
1358
1359#if EV_USE_PORT
1360 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1361#endif
1362#if EV_USE_KQUEUE
1363 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1364#endif
1365#if EV_USE_EPOLL
1366 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1367#endif
1368#if EV_USE_POLL
1369 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1370#endif
1371#if EV_USE_SELECT
1372 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1373#endif
1374
1375 ev_init (&pipeev, pipecb);
1376 ev_set_priority (&pipeev, EV_MAXPRI);
1377 }
1378}
1379
1380static void noinline
1381loop_destroy (EV_P)
1382{
1383 int i;
1384
1385 if (ev_is_active (&pipeev))
1386 {
1387 ev_ref (EV_A); /* signal watcher */
1388 ev_io_stop (EV_A_ &pipeev);
1389
1390#if EV_USE_EVENTFD
1391 if (evfd >= 0)
1392 close (evfd);
1393#endif
1394
1395 if (evpipe [0] >= 0)
1396 {
1397 close (evpipe [0]);
1398 close (evpipe [1]);
1399 }
1400 }
1401
1402#if EV_USE_INOTIFY
1403 if (fs_fd >= 0)
1404 close (fs_fd);
1405#endif
1406
1407 if (backend_fd >= 0)
1408 close (backend_fd);
1409
1410#if EV_USE_PORT
1411 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1412#endif
1413#if EV_USE_KQUEUE
1414 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1415#endif
1416#if EV_USE_EPOLL
1417 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1418#endif
1419#if EV_USE_POLL
1420 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1421#endif
1422#if EV_USE_SELECT
1423 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1424#endif
1425
1426 for (i = NUMPRI; i--; )
1427 {
1428 array_free (pending, [i]);
1429#if EV_IDLE_ENABLE
1430 array_free (idle, [i]);
1431#endif
1432 }
1433
1434 ev_free (anfds); anfdmax = 0;
1435
1436 /* have to use the microsoft-never-gets-it-right macro */
1437 array_free (fdchange, EMPTY);
1438 array_free (timer, EMPTY);
1439#if EV_PERIODIC_ENABLE
1440 array_free (periodic, EMPTY);
1441#endif
1442#if EV_FORK_ENABLE
1443 array_free (fork, EMPTY);
1444#endif
1445 array_free (prepare, EMPTY);
1446 array_free (check, EMPTY);
1447#if EV_ASYNC_ENABLE
1448 array_free (async, EMPTY);
1449#endif
1450
1451 backend = 0;
1452}
1453
1454#if EV_USE_INOTIFY
1455void inline_size infy_fork (EV_P);
1456#endif
1457
1458void inline_size
1459loop_fork (EV_P)
1460{
1461#if EV_USE_PORT
1462 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1463#endif
1464#if EV_USE_KQUEUE
1465 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1466#endif
1467#if EV_USE_EPOLL
1468 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1469#endif
1470#if EV_USE_INOTIFY
1471 infy_fork (EV_A);
1472#endif
1473
1474 if (ev_is_active (&pipeev))
1475 {
1476 /* this "locks" the handlers against writing to the pipe */
1477 /* while we modify the fd vars */
286 gotsig = 1; 1478 gotsig = 1;
287 write (sigpipe [1], &gotsig, 1); 1479#if EV_ASYNC_ENABLE
288 } 1480 gotasync = 1;
289} 1481#endif
290 1482
291static void 1483 ev_ref (EV_A);
292sigcb (struct ev_io *iow, int revents) 1484 ev_io_stop (EV_A_ &pipeev);
1485
1486#if EV_USE_EVENTFD
1487 if (evfd >= 0)
1488 close (evfd);
1489#endif
1490
1491 if (evpipe [0] >= 0)
1492 {
1493 close (evpipe [0]);
1494 close (evpipe [1]);
1495 }
1496
1497 evpipe_init (EV_A);
1498 /* now iterate over everything, in case we missed something */
1499 pipecb (EV_A_ &pipeev, EV_READ);
1500 }
1501
1502 postfork = 0;
1503}
1504
1505#if EV_MULTIPLICITY
1506
1507struct ev_loop *
1508ev_loop_new (unsigned int flags)
293{ 1509{
294 struct ev_signal *w; 1510 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1511
1512 memset (loop, 0, sizeof (struct ev_loop));
1513
1514 loop_init (EV_A_ flags);
1515
1516 if (ev_backend (EV_A))
1517 return loop;
1518
1519 return 0;
1520}
1521
1522void
1523ev_loop_destroy (EV_P)
1524{
1525 loop_destroy (EV_A);
1526 ev_free (loop);
1527}
1528
1529void
1530ev_loop_fork (EV_P)
1531{
1532 postfork = 1; /* must be in line with ev_default_fork */
1533}
1534
1535#if EV_VERIFY
1536static void noinline
1537verify_watcher (EV_P_ W w)
1538{
1539 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1540
1541 if (w->pending)
1542 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1543}
1544
1545static void noinline
1546verify_heap (EV_P_ ANHE *heap, int N)
1547{
295 int sig; 1548 int i;
296 1549
297 gotsig = 0; 1550 for (i = HEAP0; i < N + HEAP0; ++i)
298 read (sigpipe [0], &revents, 1); 1551 {
1552 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1553 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1554 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
299 1555
300 for (sig = signalmax; sig--; ) 1556 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
301 if (signals [sig].gotsig) 1557 }
1558}
1559
1560static void noinline
1561array_verify (EV_P_ W *ws, int cnt)
1562{
1563 while (cnt--)
1564 {
1565 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1566 verify_watcher (EV_A_ ws [cnt]);
1567 }
1568}
1569#endif
1570
1571void
1572ev_loop_verify (EV_P)
1573{
1574#if EV_VERIFY
1575 int i;
1576 WL w;
1577
1578 assert (activecnt >= -1);
1579
1580 assert (fdchangemax >= fdchangecnt);
1581 for (i = 0; i < fdchangecnt; ++i)
1582 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1583
1584 assert (anfdmax >= 0);
1585 for (i = 0; i < anfdmax; ++i)
1586 for (w = anfds [i].head; w; w = w->next)
302 { 1587 {
303 signals [sig].gotsig = 0; 1588 verify_watcher (EV_A_ (W)w);
304 1589 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
305 for (w = signals [sig].head; w; w = w->next) 1590 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
306 event ((W)w, EV_SIGNAL);
307 } 1591 }
308}
309 1592
310static void 1593 assert (timermax >= timercnt);
311siginit (void) 1594 verify_heap (EV_A_ timers, timercnt);
312{
313 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315 1595
316 /* rather than sort out wether we really need nb, set it */ 1596#if EV_PERIODIC_ENABLE
317 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); 1597 assert (periodicmax >= periodiccnt);
318 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); 1598 verify_heap (EV_A_ periodics, periodiccnt);
1599#endif
319 1600
320 evio_set (&sigev, sigpipe [0], EV_READ); 1601 for (i = NUMPRI; i--; )
321 evio_start (&sigev); 1602 {
1603 assert (pendingmax [i] >= pendingcnt [i]);
1604#if EV_IDLE_ENABLE
1605 assert (idleall >= 0);
1606 assert (idlemax [i] >= idlecnt [i]);
1607 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1608#endif
1609 }
1610
1611#if EV_FORK_ENABLE
1612 assert (forkmax >= forkcnt);
1613 array_verify (EV_A_ (W *)forks, forkcnt);
1614#endif
1615
1616#if EV_ASYNC_ENABLE
1617 assert (asyncmax >= asynccnt);
1618 array_verify (EV_A_ (W *)asyncs, asynccnt);
1619#endif
1620
1621 assert (preparemax >= preparecnt);
1622 array_verify (EV_A_ (W *)prepares, preparecnt);
1623
1624 assert (checkmax >= checkcnt);
1625 array_verify (EV_A_ (W *)checks, checkcnt);
1626
1627# if 0
1628 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1629 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1630# endif
1631#endif
1632}
1633
1634#endif /* multiplicity */
1635
1636#if EV_MULTIPLICITY
1637struct ev_loop *
1638ev_default_loop_init (unsigned int flags)
1639#else
1640int
1641ev_default_loop (unsigned int flags)
1642#endif
1643{
1644 if (!ev_default_loop_ptr)
1645 {
1646#if EV_MULTIPLICITY
1647 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1648#else
1649 ev_default_loop_ptr = 1;
1650#endif
1651
1652 loop_init (EV_A_ flags);
1653
1654 if (ev_backend (EV_A))
1655 {
1656#ifndef _WIN32
1657 ev_signal_init (&childev, childcb, SIGCHLD);
1658 ev_set_priority (&childev, EV_MAXPRI);
1659 ev_signal_start (EV_A_ &childev);
1660 ev_unref (EV_A); /* child watcher should not keep loop alive */
1661#endif
1662 }
1663 else
1664 ev_default_loop_ptr = 0;
1665 }
1666
1667 return ev_default_loop_ptr;
1668}
1669
1670void
1671ev_default_destroy (void)
1672{
1673#if EV_MULTIPLICITY
1674 struct ev_loop *loop = ev_default_loop_ptr;
1675#endif
1676
1677 ev_default_loop_ptr = 0;
1678
1679#ifndef _WIN32
1680 ev_ref (EV_A); /* child watcher */
1681 ev_signal_stop (EV_A_ &childev);
1682#endif
1683
1684 loop_destroy (EV_A);
1685}
1686
1687void
1688ev_default_fork (void)
1689{
1690#if EV_MULTIPLICITY
1691 struct ev_loop *loop = ev_default_loop_ptr;
1692#endif
1693
1694 postfork = 1; /* must be in line with ev_loop_fork */
322} 1695}
323 1696
324/*****************************************************************************/ 1697/*****************************************************************************/
325 1698
326static struct ev_idle **idles; 1699void
327static int idlemax, idlecnt; 1700ev_invoke (EV_P_ void *w, int revents)
328
329static struct ev_check **checks;
330static int checkmax, checkcnt;
331
332/*****************************************************************************/
333
334#if HAVE_EPOLL
335# include "ev_epoll.c"
336#endif
337#if HAVE_SELECT
338# include "ev_select.c"
339#endif
340
341int ev_init (int flags)
342{ 1701{
343#if HAVE_MONOTONIC 1702 EV_CB_INVOKE ((W)w, revents);
344 {
345 struct timespec ts;
346 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
347 have_monotonic = 1;
348 }
349#endif
350
351 ev_now = ev_time ();
352 now = get_clock ();
353 diff = ev_now - now;
354
355 if (pipe (sigpipe))
356 return 0;
357
358 ev_method = EVMETHOD_NONE;
359#if HAVE_EPOLL
360 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
361#endif
362#if HAVE_SELECT
363 if (ev_method == EVMETHOD_NONE) select_init (flags);
364#endif
365
366 if (ev_method)
367 {
368 evw_init (&sigev, sigcb);
369 siginit ();
370 }
371
372 return ev_method;
373} 1703}
374 1704
375/*****************************************************************************/ 1705void inline_speed
376 1706call_pending (EV_P)
377void ev_prefork (void)
378{ 1707{
379 /* nop */
380}
381
382void ev_postfork_parent (void)
383{
384 /* nop */
385}
386
387void ev_postfork_child (void)
388{
389#if HAVE_EPOLL
390 if (ev_method == EVMETHOD_EPOLL)
391 epoll_postfork_child ();
392#endif
393
394 evio_stop (&sigev);
395 close (sigpipe [0]);
396 close (sigpipe [1]);
397 pipe (sigpipe);
398 siginit ();
399}
400
401/*****************************************************************************/
402
403static void
404fd_reify (void)
405{
406 int i; 1708 int pri;
407 1709
408 for (i = 0; i < fdchangecnt; ++i) 1710 for (pri = NUMPRI; pri--; )
1711 while (pendingcnt [pri])
409 { 1712 {
410 int fd = fdchanges [i]; 1713 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
411 ANFD *anfd = anfds + fd;
412 struct ev_io *w;
413 1714
414 int wev = 0; 1715 if (expect_true (p->w))
1716 {
1717 /*assert (("non-pending watcher on pending list", p->w->pending));*/
415 1718
416 for (w = anfd->head; w; w = w->next) 1719 p->w->pending = 0;
417 wev |= w->events; 1720 EV_CB_INVOKE (p->w, p->events);
1721 EV_FREQUENT_CHECK;
1722 }
1723 }
1724}
418 1725
419 if (anfd->wev != wev) 1726#if EV_IDLE_ENABLE
1727void inline_size
1728idle_reify (EV_P)
1729{
1730 if (expect_false (idleall))
1731 {
1732 int pri;
1733
1734 for (pri = NUMPRI; pri--; )
420 { 1735 {
421 method_modify (fd, anfd->wev, wev); 1736 if (pendingcnt [pri])
422 anfd->wev = wev; 1737 break;
1738
1739 if (idlecnt [pri])
1740 {
1741 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1742 break;
1743 }
423 } 1744 }
424 } 1745 }
425
426 fdchangecnt = 0;
427} 1746}
1747#endif
428 1748
429static void 1749void inline_size
430call_pending ()
431{
432 while (pendingcnt)
433 {
434 ANPENDING *p = pendings + --pendingcnt;
435
436 if (p->w)
437 {
438 p->w->pending = 0;
439 p->w->cb (p->w, p->events);
440 }
441 }
442}
443
444static void
445timers_reify () 1750timers_reify (EV_P)
446{ 1751{
1752 EV_FREQUENT_CHECK;
1753
447 while (timercnt && timers [0]->at <= now) 1754 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
448 { 1755 {
449 struct ev_timer *w = timers [0]; 1756 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
450 1757
451 event ((W)w, EV_TIMEOUT); 1758 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
452 1759
453 /* first reschedule or stop timer */ 1760 /* first reschedule or stop timer */
454 if (w->repeat) 1761 if (w->repeat)
455 { 1762 {
456 w->at = now + w->repeat; 1763 ev_at (w) += w->repeat;
457 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1764 if (ev_at (w) < mn_now)
1765 ev_at (w) = mn_now;
1766
1767 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1768
1769 ANHE_at_cache (timers [HEAP0]);
458 downheap ((WT *)timers, timercnt, 0); 1770 downheap (timers, timercnt, HEAP0);
459 } 1771 }
460 else 1772 else
461 evtimer_stop (w); /* nonrepeating: stop timer */ 1773 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
462 }
463}
464 1774
465static void 1775 EV_FREQUENT_CHECK;
1776 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1777 }
1778}
1779
1780#if EV_PERIODIC_ENABLE
1781void inline_size
466periodics_reify () 1782periodics_reify (EV_P)
467{ 1783{
1784 EV_FREQUENT_CHECK;
1785
468 while (periodiccnt && periodics [0]->at <= ev_now) 1786 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
469 { 1787 {
470 struct ev_periodic *w = periodics [0]; 1788 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1789
1790 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
471 1791
472 /* first reschedule or stop timer */ 1792 /* first reschedule or stop timer */
473 if (w->interval) 1793 if (w->reschedule_cb)
474 { 1794 {
475 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1795 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
476 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1796
1797 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1798
1799 ANHE_at_cache (periodics [HEAP0]);
477 downheap ((WT *)periodics, periodiccnt, 0); 1800 downheap (periodics, periodiccnt, HEAP0);
1801 }
1802 else if (w->interval)
1803 {
1804 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1805 /* if next trigger time is not sufficiently in the future, put it there */
1806 /* this might happen because of floating point inexactness */
1807 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1808 {
1809 ev_at (w) += w->interval;
1810
1811 /* if interval is unreasonably low we might still have a time in the past */
1812 /* so correct this. this will make the periodic very inexact, but the user */
1813 /* has effectively asked to get triggered more often than possible */
1814 if (ev_at (w) < ev_rt_now)
1815 ev_at (w) = ev_rt_now;
1816 }
1817
1818 ANHE_at_cache (periodics [HEAP0]);
1819 downheap (periodics, periodiccnt, HEAP0);
478 } 1820 }
479 else 1821 else
480 evperiodic_stop (w); /* nonrepeating: stop timer */ 1822 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
481 1823
482 event ((W)w, EV_TIMEOUT); 1824 EV_FREQUENT_CHECK;
1825 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
483 } 1826 }
484} 1827}
485 1828
486static void 1829static void noinline
487periodics_reschedule (ev_tstamp diff) 1830periodics_reschedule (EV_P)
488{ 1831{
489 int i; 1832 int i;
490 1833
491 /* adjust periodics after time jump */ 1834 /* adjust periodics after time jump */
492 for (i = 0; i < periodiccnt; ++i) 1835 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
493 { 1836 {
494 struct ev_periodic *w = periodics [i]; 1837 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
495 1838
1839 if (w->reschedule_cb)
1840 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
496 if (w->interval) 1841 else if (w->interval)
1842 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1843
1844 ANHE_at_cache (periodics [i]);
1845 }
1846
1847 reheap (periodics, periodiccnt);
1848}
1849#endif
1850
1851void inline_speed
1852time_update (EV_P_ ev_tstamp max_block)
1853{
1854 int i;
1855
1856#if EV_USE_MONOTONIC
1857 if (expect_true (have_monotonic))
1858 {
1859 ev_tstamp odiff = rtmn_diff;
1860
1861 mn_now = get_clock ();
1862
1863 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1864 /* interpolate in the meantime */
1865 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
497 { 1866 {
498 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1867 ev_rt_now = rtmn_diff + mn_now;
1868 return;
1869 }
499 1870
500 if (fabs (diff) >= 1e-4) 1871 now_floor = mn_now;
1872 ev_rt_now = ev_time ();
1873
1874 /* loop a few times, before making important decisions.
1875 * on the choice of "4": one iteration isn't enough,
1876 * in case we get preempted during the calls to
1877 * ev_time and get_clock. a second call is almost guaranteed
1878 * to succeed in that case, though. and looping a few more times
1879 * doesn't hurt either as we only do this on time-jumps or
1880 * in the unlikely event of having been preempted here.
1881 */
1882 for (i = 4; --i; )
1883 {
1884 rtmn_diff = ev_rt_now - mn_now;
1885
1886 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1887 return; /* all is well */
1888
1889 ev_rt_now = ev_time ();
1890 mn_now = get_clock ();
1891 now_floor = mn_now;
1892 }
1893
1894# if EV_PERIODIC_ENABLE
1895 periodics_reschedule (EV_A);
1896# endif
1897 /* no timer adjustment, as the monotonic clock doesn't jump */
1898 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1899 }
1900 else
1901#endif
1902 {
1903 ev_rt_now = ev_time ();
1904
1905 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1906 {
1907#if EV_PERIODIC_ENABLE
1908 periodics_reschedule (EV_A);
1909#endif
1910 /* adjust timers. this is easy, as the offset is the same for all of them */
1911 for (i = 0; i < timercnt; ++i)
501 { 1912 {
502 evperiodic_stop (w); 1913 ANHE *he = timers + i + HEAP0;
503 evperiodic_start (w); 1914 ANHE_w (*he)->at += ev_rt_now - mn_now;
504 1915 ANHE_at_cache (*he);
505 i = 0; /* restart loop, inefficient, but time jumps should be rare */
506 } 1916 }
507 } 1917 }
508 }
509}
510 1918
511static void 1919 mn_now = ev_rt_now;
512time_update ()
513{
514 int i;
515
516 ev_now = ev_time ();
517
518 if (have_monotonic)
519 { 1920 }
520 ev_tstamp odiff = diff; 1921}
521 1922
522 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1923void
1924ev_ref (EV_P)
1925{
1926 ++activecnt;
1927}
1928
1929void
1930ev_unref (EV_P)
1931{
1932 --activecnt;
1933}
1934
1935void
1936ev_now_update (EV_P)
1937{
1938 time_update (EV_A_ 1e100);
1939}
1940
1941static int loop_done;
1942
1943void
1944ev_loop (EV_P_ int flags)
1945{
1946 loop_done = EVUNLOOP_CANCEL;
1947
1948 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1949
1950 do
1951 {
1952#if EV_VERIFY >= 2
1953 ev_loop_verify (EV_A);
1954#endif
1955
1956#ifndef _WIN32
1957 if (expect_false (curpid)) /* penalise the forking check even more */
1958 if (expect_false (getpid () != curpid))
1959 {
1960 curpid = getpid ();
1961 postfork = 1;
1962 }
1963#endif
1964
1965#if EV_FORK_ENABLE
1966 /* we might have forked, so queue fork handlers */
1967 if (expect_false (postfork))
1968 if (forkcnt)
1969 {
1970 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1971 call_pending (EV_A);
1972 }
1973#endif
1974
1975 /* queue prepare watchers (and execute them) */
1976 if (expect_false (preparecnt))
523 { 1977 {
524 now = get_clock (); 1978 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
525 diff = ev_now - now; 1979 call_pending (EV_A);
526
527 if (fabs (odiff - diff) < MIN_TIMEJUMP)
528 return; /* all is well */
529
530 ev_now = ev_time ();
531 } 1980 }
532 1981
533 periodics_reschedule (diff - odiff); 1982 if (expect_false (!activecnt))
534 /* no timer adjustment, as the monotonic clock doesn't jump */ 1983 break;
535 }
536 else
537 {
538 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
539 {
540 periodics_reschedule (ev_now - now);
541 1984
542 /* adjust timers. this is easy, as the offset is the same for all */ 1985 /* we might have forked, so reify kernel state if necessary */
543 for (i = 0; i < timercnt; ++i) 1986 if (expect_false (postfork))
544 timers [i]->at += diff; 1987 loop_fork (EV_A);
545 }
546 1988
547 now = ev_now;
548 }
549}
550
551int ev_loop_done;
552
553void ev_loop (int flags)
554{
555 double block;
556 ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
557
558 if (checkcnt)
559 {
560 queue_events ((W *)checks, checkcnt, EV_CHECK);
561 call_pending ();
562 }
563
564 do
565 {
566 /* update fd-related kernel structures */ 1989 /* update fd-related kernel structures */
567 fd_reify (); 1990 fd_reify (EV_A);
568 1991
569 /* calculate blocking time */ 1992 /* calculate blocking time */
1993 {
1994 ev_tstamp waittime = 0.;
1995 ev_tstamp sleeptime = 0.;
570 1996
571 /* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */ 1997 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
572 ev_now = ev_time ();
573
574 if (flags & EVLOOP_NONBLOCK || idlecnt)
575 block = 0.;
576 else
577 { 1998 {
1999 /* update time to cancel out callback processing overhead */
2000 time_update (EV_A_ 1e100);
2001
578 block = MAX_BLOCKTIME; 2002 waittime = MAX_BLOCKTIME;
579 2003
580 if (timercnt) 2004 if (timercnt)
581 { 2005 {
582 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 2006 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
583 if (block > to) block = to; 2007 if (waittime > to) waittime = to;
584 } 2008 }
585 2009
2010#if EV_PERIODIC_ENABLE
586 if (periodiccnt) 2011 if (periodiccnt)
587 { 2012 {
588 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 2013 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
589 if (block > to) block = to; 2014 if (waittime > to) waittime = to;
590 } 2015 }
2016#endif
591 2017
592 if (block < 0.) block = 0.; 2018 if (expect_false (waittime < timeout_blocktime))
2019 waittime = timeout_blocktime;
2020
2021 sleeptime = waittime - backend_fudge;
2022
2023 if (expect_true (sleeptime > io_blocktime))
2024 sleeptime = io_blocktime;
2025
2026 if (sleeptime)
2027 {
2028 ev_sleep (sleeptime);
2029 waittime -= sleeptime;
2030 }
593 } 2031 }
594 2032
595 method_poll (block); 2033 ++loop_count;
2034 backend_poll (EV_A_ waittime);
596 2035
597 /* update ev_now, do magic */ 2036 /* update ev_rt_now, do magic */
598 time_update (); 2037 time_update (EV_A_ waittime + sleeptime);
2038 }
599 2039
600 /* queue pending timers and reschedule them */ 2040 /* queue pending timers and reschedule them */
2041 timers_reify (EV_A); /* relative timers called last */
2042#if EV_PERIODIC_ENABLE
601 periodics_reify (); /* absolute timers first */ 2043 periodics_reify (EV_A); /* absolute timers called first */
602 timers_reify (); /* relative timers second */ 2044#endif
603 2045
2046#if EV_IDLE_ENABLE
604 /* queue idle watchers unless io or timers are pending */ 2047 /* queue idle watchers unless other events are pending */
605 if (!pendingcnt) 2048 idle_reify (EV_A);
606 queue_events ((W *)idles, idlecnt, EV_IDLE); 2049#endif
607 2050
608 /* queue check and possibly idle watchers */ 2051 /* queue check watchers, to be executed first */
2052 if (expect_false (checkcnt))
609 queue_events ((W *)checks, checkcnt, EV_CHECK); 2053 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
610 2054
611 call_pending (); 2055 call_pending (EV_A);
612 } 2056 }
613 while (!ev_loop_done); 2057 while (expect_true (
2058 activecnt
2059 && !loop_done
2060 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2061 ));
614 2062
615 if (ev_loop_done != 2) 2063 if (loop_done == EVUNLOOP_ONE)
2064 loop_done = EVUNLOOP_CANCEL;
2065}
2066
2067void
2068ev_unloop (EV_P_ int how)
2069{
616 ev_loop_done = 0; 2070 loop_done = how;
617} 2071}
618 2072
619/*****************************************************************************/ 2073/*****************************************************************************/
620 2074
621static void 2075void inline_size
622wlist_add (WL *head, WL elem) 2076wlist_add (WL *head, WL elem)
623{ 2077{
624 elem->next = *head; 2078 elem->next = *head;
625 *head = elem; 2079 *head = elem;
626} 2080}
627 2081
628static void 2082void inline_size
629wlist_del (WL *head, WL elem) 2083wlist_del (WL *head, WL elem)
630{ 2084{
631 while (*head) 2085 while (*head)
632 { 2086 {
633 if (*head == elem) 2087 if (*head == elem)
… …
638 2092
639 head = &(*head)->next; 2093 head = &(*head)->next;
640 } 2094 }
641} 2095}
642 2096
643static void 2097void inline_speed
644ev_clear (W w) 2098clear_pending (EV_P_ W w)
645{ 2099{
646 if (w->pending) 2100 if (w->pending)
647 { 2101 {
648 pendings [w->pending - 1].w = 0; 2102 pendings [ABSPRI (w)][w->pending - 1].w = 0;
649 w->pending = 0; 2103 w->pending = 0;
650 } 2104 }
651} 2105}
652 2106
653static void 2107int
2108ev_clear_pending (EV_P_ void *w)
2109{
2110 W w_ = (W)w;
2111 int pending = w_->pending;
2112
2113 if (expect_true (pending))
2114 {
2115 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2116 w_->pending = 0;
2117 p->w = 0;
2118 return p->events;
2119 }
2120 else
2121 return 0;
2122}
2123
2124void inline_size
2125pri_adjust (EV_P_ W w)
2126{
2127 int pri = w->priority;
2128 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2129 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2130 w->priority = pri;
2131}
2132
2133void inline_speed
654ev_start (W w, int active) 2134ev_start (EV_P_ W w, int active)
655{ 2135{
2136 pri_adjust (EV_A_ w);
656 w->active = active; 2137 w->active = active;
2138 ev_ref (EV_A);
657} 2139}
658 2140
659static void 2141void inline_size
660ev_stop (W w) 2142ev_stop (EV_P_ W w)
661{ 2143{
2144 ev_unref (EV_A);
662 w->active = 0; 2145 w->active = 0;
663} 2146}
664 2147
665/*****************************************************************************/ 2148/*****************************************************************************/
666 2149
667void 2150void noinline
668evio_start (struct ev_io *w) 2151ev_io_start (EV_P_ ev_io *w)
669{ 2152{
2153 int fd = w->fd;
2154
670 if (ev_is_active (w)) 2155 if (expect_false (ev_is_active (w)))
671 return; 2156 return;
672 2157
673 int fd = w->fd; 2158 assert (("ev_io_start called with negative fd", fd >= 0));
2159 assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));
674 2160
2161 EV_FREQUENT_CHECK;
2162
675 ev_start ((W)w, 1); 2163 ev_start (EV_A_ (W)w, 1);
676 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2164 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
677 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2165 wlist_add (&anfds[fd].head, (WL)w);
678 2166
679 ++fdchangecnt; 2167 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
680 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 2168 w->events &= ~EV_IOFDSET;
681 fdchanges [fdchangecnt - 1] = fd;
682}
683 2169
684void 2170 EV_FREQUENT_CHECK;
2171}
2172
2173void noinline
685evio_stop (struct ev_io *w) 2174ev_io_stop (EV_P_ ev_io *w)
686{ 2175{
687 ev_clear ((W)w); 2176 clear_pending (EV_A_ (W)w);
688 if (!ev_is_active (w)) 2177 if (expect_false (!ev_is_active (w)))
689 return; 2178 return;
690 2179
2180 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2181
2182 EV_FREQUENT_CHECK;
2183
691 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2184 wlist_del (&anfds[w->fd].head, (WL)w);
692 ev_stop ((W)w); 2185 ev_stop (EV_A_ (W)w);
693 2186
694 ++fdchangecnt; 2187 fd_change (EV_A_ w->fd, 1);
695 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
696 fdchanges [fdchangecnt - 1] = w->fd;
697}
698 2188
699void 2189 EV_FREQUENT_CHECK;
2190}
2191
2192void noinline
700evtimer_start (struct ev_timer *w) 2193ev_timer_start (EV_P_ ev_timer *w)
701{ 2194{
702 if (ev_is_active (w)) 2195 if (expect_false (ev_is_active (w)))
703 return; 2196 return;
704 2197
705 w->at += now; 2198 ev_at (w) += mn_now;
706 2199
707 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 2200 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
708 2201
709 ev_start ((W)w, ++timercnt); 2202 EV_FREQUENT_CHECK;
710 array_needsize (timers, timermax, timercnt, );
711 timers [timercnt - 1] = w;
712 upheap ((WT *)timers, timercnt - 1);
713}
714 2203
715void 2204 ++timercnt;
2205 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2206 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2207 ANHE_w (timers [ev_active (w)]) = (WT)w;
2208 ANHE_at_cache (timers [ev_active (w)]);
2209 upheap (timers, ev_active (w));
2210
2211 EV_FREQUENT_CHECK;
2212
2213 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2214}
2215
2216void noinline
716evtimer_stop (struct ev_timer *w) 2217ev_timer_stop (EV_P_ ev_timer *w)
717{ 2218{
718 ev_clear ((W)w); 2219 clear_pending (EV_A_ (W)w);
719 if (!ev_is_active (w)) 2220 if (expect_false (!ev_is_active (w)))
720 return; 2221 return;
721 2222
722 if (w->active < timercnt--) 2223 EV_FREQUENT_CHECK;
2224
2225 {
2226 int active = ev_active (w);
2227
2228 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2229
2230 --timercnt;
2231
2232 if (expect_true (active < timercnt + HEAP0))
723 { 2233 {
724 timers [w->active - 1] = timers [timercnt]; 2234 timers [active] = timers [timercnt + HEAP0];
725 downheap ((WT *)timers, timercnt, w->active - 1); 2235 adjustheap (timers, timercnt, active);
726 } 2236 }
2237 }
727 2238
728 w->at = w->repeat; 2239 EV_FREQUENT_CHECK;
729 2240
2241 ev_at (w) -= mn_now;
2242
730 ev_stop ((W)w); 2243 ev_stop (EV_A_ (W)w);
731} 2244}
732 2245
733void 2246void noinline
734evtimer_again (struct ev_timer *w) 2247ev_timer_again (EV_P_ ev_timer *w)
735{ 2248{
2249 EV_FREQUENT_CHECK;
2250
736 if (ev_is_active (w)) 2251 if (ev_is_active (w))
737 { 2252 {
738 if (w->repeat) 2253 if (w->repeat)
739 { 2254 {
740 w->at = now + w->repeat; 2255 ev_at (w) = mn_now + w->repeat;
2256 ANHE_at_cache (timers [ev_active (w)]);
741 downheap ((WT *)timers, timercnt, w->active - 1); 2257 adjustheap (timers, timercnt, ev_active (w));
742 } 2258 }
743 else 2259 else
744 evtimer_stop (w); 2260 ev_timer_stop (EV_A_ w);
745 } 2261 }
746 else if (w->repeat) 2262 else if (w->repeat)
2263 {
2264 ev_at (w) = w->repeat;
747 evtimer_start (w); 2265 ev_timer_start (EV_A_ w);
748} 2266 }
749 2267
750void 2268 EV_FREQUENT_CHECK;
2269}
2270
2271#if EV_PERIODIC_ENABLE
2272void noinline
751evperiodic_start (struct ev_periodic *w) 2273ev_periodic_start (EV_P_ ev_periodic *w)
752{ 2274{
753 if (ev_is_active (w)) 2275 if (expect_false (ev_is_active (w)))
754 return; 2276 return;
755 2277
756 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 2278 if (w->reschedule_cb)
757 2279 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2280 else if (w->interval)
2281 {
2282 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
758 /* this formula differs from the one in periodic_reify because we do not always round up */ 2283 /* this formula differs from the one in periodic_reify because we do not always round up */
759 if (w->interval)
760 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 2284 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2285 }
2286 else
2287 ev_at (w) = w->offset;
761 2288
2289 EV_FREQUENT_CHECK;
2290
2291 ++periodiccnt;
762 ev_start ((W)w, ++periodiccnt); 2292 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
763 array_needsize (periodics, periodicmax, periodiccnt, ); 2293 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
764 periodics [periodiccnt - 1] = w; 2294 ANHE_w (periodics [ev_active (w)]) = (WT)w;
765 upheap ((WT *)periodics, periodiccnt - 1); 2295 ANHE_at_cache (periodics [ev_active (w)]);
766} 2296 upheap (periodics, ev_active (w));
767 2297
768void 2298 EV_FREQUENT_CHECK;
2299
2300 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2301}
2302
2303void noinline
769evperiodic_stop (struct ev_periodic *w) 2304ev_periodic_stop (EV_P_ ev_periodic *w)
770{ 2305{
771 ev_clear ((W)w); 2306 clear_pending (EV_A_ (W)w);
772 if (!ev_is_active (w)) 2307 if (expect_false (!ev_is_active (w)))
773 return; 2308 return;
774 2309
775 if (w->active < periodiccnt--) 2310 EV_FREQUENT_CHECK;
2311
2312 {
2313 int active = ev_active (w);
2314
2315 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2316
2317 --periodiccnt;
2318
2319 if (expect_true (active < periodiccnt + HEAP0))
776 { 2320 {
777 periodics [w->active - 1] = periodics [periodiccnt]; 2321 periodics [active] = periodics [periodiccnt + HEAP0];
778 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2322 adjustheap (periodics, periodiccnt, active);
779 } 2323 }
2324 }
780 2325
2326 EV_FREQUENT_CHECK;
2327
781 ev_stop ((W)w); 2328 ev_stop (EV_A_ (W)w);
782} 2329}
783 2330
784void 2331void noinline
2332ev_periodic_again (EV_P_ ev_periodic *w)
2333{
2334 /* TODO: use adjustheap and recalculation */
2335 ev_periodic_stop (EV_A_ w);
2336 ev_periodic_start (EV_A_ w);
2337}
2338#endif
2339
2340#ifndef SA_RESTART
2341# define SA_RESTART 0
2342#endif
2343
2344void noinline
785evsignal_start (struct ev_signal *w) 2345ev_signal_start (EV_P_ ev_signal *w)
786{ 2346{
2347#if EV_MULTIPLICITY
2348 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2349#endif
787 if (ev_is_active (w)) 2350 if (expect_false (ev_is_active (w)))
788 return; 2351 return;
789 2352
2353 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2354
2355 evpipe_init (EV_A);
2356
2357 EV_FREQUENT_CHECK;
2358
2359 {
2360#ifndef _WIN32
2361 sigset_t full, prev;
2362 sigfillset (&full);
2363 sigprocmask (SIG_SETMASK, &full, &prev);
2364#endif
2365
2366 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2367
2368#ifndef _WIN32
2369 sigprocmask (SIG_SETMASK, &prev, 0);
2370#endif
2371 }
2372
790 ev_start ((W)w, 1); 2373 ev_start (EV_A_ (W)w, 1);
791 array_needsize (signals, signalmax, w->signum, signals_init);
792 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2374 wlist_add (&signals [w->signum - 1].head, (WL)w);
793 2375
794 if (!w->next) 2376 if (!((WL)w)->next)
795 { 2377 {
2378#if _WIN32
2379 signal (w->signum, ev_sighandler);
2380#else
796 struct sigaction sa; 2381 struct sigaction sa;
797 sa.sa_handler = sighandler; 2382 sa.sa_handler = ev_sighandler;
798 sigfillset (&sa.sa_mask); 2383 sigfillset (&sa.sa_mask);
799 sa.sa_flags = 0; 2384 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
800 sigaction (w->signum, &sa, 0); 2385 sigaction (w->signum, &sa, 0);
2386#endif
801 } 2387 }
802}
803 2388
804void 2389 EV_FREQUENT_CHECK;
2390}
2391
2392void noinline
805evsignal_stop (struct ev_signal *w) 2393ev_signal_stop (EV_P_ ev_signal *w)
806{ 2394{
807 ev_clear ((W)w); 2395 clear_pending (EV_A_ (W)w);
808 if (!ev_is_active (w)) 2396 if (expect_false (!ev_is_active (w)))
809 return; 2397 return;
810 2398
2399 EV_FREQUENT_CHECK;
2400
811 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2401 wlist_del (&signals [w->signum - 1].head, (WL)w);
812 ev_stop ((W)w); 2402 ev_stop (EV_A_ (W)w);
813 2403
814 if (!signals [w->signum - 1].head) 2404 if (!signals [w->signum - 1].head)
815 signal (w->signum, SIG_DFL); 2405 signal (w->signum, SIG_DFL);
816}
817 2406
818void evidle_start (struct ev_idle *w) 2407 EV_FREQUENT_CHECK;
2408}
2409
2410void
2411ev_child_start (EV_P_ ev_child *w)
819{ 2412{
2413#if EV_MULTIPLICITY
2414 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2415#endif
820 if (ev_is_active (w)) 2416 if (expect_false (ev_is_active (w)))
821 return; 2417 return;
822 2418
823 ev_start ((W)w, ++idlecnt); 2419 EV_FREQUENT_CHECK;
824 array_needsize (idles, idlemax, idlecnt, );
825 idles [idlecnt - 1] = w;
826}
827 2420
828void evidle_stop (struct ev_idle *w) 2421 ev_start (EV_A_ (W)w, 1);
2422 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2423
2424 EV_FREQUENT_CHECK;
2425}
2426
2427void
2428ev_child_stop (EV_P_ ev_child *w)
829{ 2429{
830 ev_clear ((W)w); 2430 clear_pending (EV_A_ (W)w);
831 if (ev_is_active (w)) 2431 if (expect_false (!ev_is_active (w)))
832 return; 2432 return;
833 2433
834 idles [w->active - 1] = idles [--idlecnt]; 2434 EV_FREQUENT_CHECK;
2435
2436 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
835 ev_stop ((W)w); 2437 ev_stop (EV_A_ (W)w);
836}
837 2438
838void evcheck_start (struct ev_check *w) 2439 EV_FREQUENT_CHECK;
2440}
2441
2442#if EV_STAT_ENABLE
2443
2444# ifdef _WIN32
2445# undef lstat
2446# define lstat(a,b) _stati64 (a,b)
2447# endif
2448
2449#define DEF_STAT_INTERVAL 5.0074891
2450#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2451#define MIN_STAT_INTERVAL 0.1074891
2452
2453static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2454
2455#if EV_USE_INOTIFY
2456# define EV_INOTIFY_BUFSIZE 8192
2457
2458static void noinline
2459infy_add (EV_P_ ev_stat *w)
839{ 2460{
840 if (ev_is_active (w)) 2461 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);
2462
2463 if (w->wd < 0)
2464 {
2465 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2466 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2467
2468 /* monitor some parent directory for speedup hints */
2469 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2470 /* but an efficiency issue only */
2471 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2472 {
2473 char path [4096];
2474 strcpy (path, w->path);
2475
2476 do
2477 {
2478 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2479 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2480
2481 char *pend = strrchr (path, '/');
2482
2483 if (!pend)
2484 break; /* whoops, no '/', complain to your admin */
2485
2486 *pend = 0;
2487 w->wd = inotify_add_watch (fs_fd, path, mask);
2488 }
2489 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2490 }
2491 }
2492 else
2493 {
2494 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2495
2496 /* now local changes will be tracked by inotify, but remote changes won't */
2497 /* unless the filesystem it known to be local, we therefore still poll */
2498 /* also do poll on <2.6.25, but with normal frequency */
2499 struct statfs sfs;
2500
2501 if (fs_2625 && !statfs (w->path, &sfs))
2502 if (sfs.f_type == 0x1373 /* devfs */
2503 || sfs.f_type == 0xEF53 /* ext2/3 */
2504 || sfs.f_type == 0x3153464a /* jfs */
2505 || sfs.f_type == 0x52654973 /* reiser3 */
2506 || sfs.f_type == 0x01021994 /* tempfs */
2507 || sfs.f_type == 0x58465342 /* xfs */)
2508 return;
2509
2510 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2511 ev_timer_again (EV_A_ &w->timer);
2512 }
2513}
2514
2515static void noinline
2516infy_del (EV_P_ ev_stat *w)
2517{
2518 int slot;
2519 int wd = w->wd;
2520
2521 if (wd < 0)
841 return; 2522 return;
842 2523
2524 w->wd = -2;
2525 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2526 wlist_del (&fs_hash [slot].head, (WL)w);
2527
2528 /* remove this watcher, if others are watching it, they will rearm */
2529 inotify_rm_watch (fs_fd, wd);
2530}
2531
2532static void noinline
2533infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2534{
2535 if (slot < 0)
2536 /* overflow, need to check for all hash slots */
2537 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2538 infy_wd (EV_A_ slot, wd, ev);
2539 else
2540 {
2541 WL w_;
2542
2543 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2544 {
2545 ev_stat *w = (ev_stat *)w_;
2546 w_ = w_->next; /* lets us remove this watcher and all before it */
2547
2548 if (w->wd == wd || wd == -1)
2549 {
2550 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2551 {
2552 w->wd = -1;
2553 infy_add (EV_A_ w); /* re-add, no matter what */
2554 }
2555
2556 stat_timer_cb (EV_A_ &w->timer, 0);
2557 }
2558 }
2559 }
2560}
2561
2562static void
2563infy_cb (EV_P_ ev_io *w, int revents)
2564{
2565 char buf [EV_INOTIFY_BUFSIZE];
2566 struct inotify_event *ev = (struct inotify_event *)buf;
2567 int ofs;
2568 int len = read (fs_fd, buf, sizeof (buf));
2569
2570 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2571 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2572}
2573
2574void inline_size
2575check_2625 (EV_P)
2576{
2577 /* kernels < 2.6.25 are borked
2578 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2579 */
2580 struct utsname buf;
2581 int major, minor, micro;
2582
2583 if (uname (&buf))
2584 return;
2585
2586 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2587 return;
2588
2589 if (major < 2
2590 || (major == 2 && minor < 6)
2591 || (major == 2 && minor == 6 && micro < 25))
2592 return;
2593
2594 fs_2625 = 1;
2595}
2596
2597void inline_size
2598infy_init (EV_P)
2599{
2600 if (fs_fd != -2)
2601 return;
2602
2603 fs_fd = -1;
2604
2605 check_2625 (EV_A);
2606
2607 fs_fd = inotify_init ();
2608
2609 if (fs_fd >= 0)
2610 {
2611 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2612 ev_set_priority (&fs_w, EV_MAXPRI);
2613 ev_io_start (EV_A_ &fs_w);
2614 }
2615}
2616
2617void inline_size
2618infy_fork (EV_P)
2619{
2620 int slot;
2621
2622 if (fs_fd < 0)
2623 return;
2624
2625 close (fs_fd);
2626 fs_fd = inotify_init ();
2627
2628 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2629 {
2630 WL w_ = fs_hash [slot].head;
2631 fs_hash [slot].head = 0;
2632
2633 while (w_)
2634 {
2635 ev_stat *w = (ev_stat *)w_;
2636 w_ = w_->next; /* lets us add this watcher */
2637
2638 w->wd = -1;
2639
2640 if (fs_fd >= 0)
2641 infy_add (EV_A_ w); /* re-add, no matter what */
2642 else
2643 ev_timer_again (EV_A_ &w->timer);
2644 }
2645 }
2646}
2647
2648#endif
2649
2650#ifdef _WIN32
2651# define EV_LSTAT(p,b) _stati64 (p, b)
2652#else
2653# define EV_LSTAT(p,b) lstat (p, b)
2654#endif
2655
2656void
2657ev_stat_stat (EV_P_ ev_stat *w)
2658{
2659 if (lstat (w->path, &w->attr) < 0)
2660 w->attr.st_nlink = 0;
2661 else if (!w->attr.st_nlink)
2662 w->attr.st_nlink = 1;
2663}
2664
2665static void noinline
2666stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2667{
2668 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2669
2670 /* we copy this here each the time so that */
2671 /* prev has the old value when the callback gets invoked */
2672 w->prev = w->attr;
2673 ev_stat_stat (EV_A_ w);
2674
2675 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2676 if (
2677 w->prev.st_dev != w->attr.st_dev
2678 || w->prev.st_ino != w->attr.st_ino
2679 || w->prev.st_mode != w->attr.st_mode
2680 || w->prev.st_nlink != w->attr.st_nlink
2681 || w->prev.st_uid != w->attr.st_uid
2682 || w->prev.st_gid != w->attr.st_gid
2683 || w->prev.st_rdev != w->attr.st_rdev
2684 || w->prev.st_size != w->attr.st_size
2685 || w->prev.st_atime != w->attr.st_atime
2686 || w->prev.st_mtime != w->attr.st_mtime
2687 || w->prev.st_ctime != w->attr.st_ctime
2688 ) {
2689 #if EV_USE_INOTIFY
2690 if (fs_fd >= 0)
2691 {
2692 infy_del (EV_A_ w);
2693 infy_add (EV_A_ w);
2694 ev_stat_stat (EV_A_ w); /* avoid race... */
2695 }
2696 #endif
2697
2698 ev_feed_event (EV_A_ w, EV_STAT);
2699 }
2700}
2701
2702void
2703ev_stat_start (EV_P_ ev_stat *w)
2704{
2705 if (expect_false (ev_is_active (w)))
2706 return;
2707
2708 ev_stat_stat (EV_A_ w);
2709
2710 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2711 w->interval = MIN_STAT_INTERVAL;
2712
2713 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2714 ev_set_priority (&w->timer, ev_priority (w));
2715
2716#if EV_USE_INOTIFY
2717 infy_init (EV_A);
2718
2719 if (fs_fd >= 0)
2720 infy_add (EV_A_ w);
2721 else
2722#endif
2723 ev_timer_again (EV_A_ &w->timer);
2724
2725 ev_start (EV_A_ (W)w, 1);
2726
2727 EV_FREQUENT_CHECK;
2728}
2729
2730void
2731ev_stat_stop (EV_P_ ev_stat *w)
2732{
2733 clear_pending (EV_A_ (W)w);
2734 if (expect_false (!ev_is_active (w)))
2735 return;
2736
2737 EV_FREQUENT_CHECK;
2738
2739#if EV_USE_INOTIFY
2740 infy_del (EV_A_ w);
2741#endif
2742 ev_timer_stop (EV_A_ &w->timer);
2743
2744 ev_stop (EV_A_ (W)w);
2745
2746 EV_FREQUENT_CHECK;
2747}
2748#endif
2749
2750#if EV_IDLE_ENABLE
2751void
2752ev_idle_start (EV_P_ ev_idle *w)
2753{
2754 if (expect_false (ev_is_active (w)))
2755 return;
2756
2757 pri_adjust (EV_A_ (W)w);
2758
2759 EV_FREQUENT_CHECK;
2760
2761 {
2762 int active = ++idlecnt [ABSPRI (w)];
2763
2764 ++idleall;
2765 ev_start (EV_A_ (W)w, active);
2766
2767 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2768 idles [ABSPRI (w)][active - 1] = w;
2769 }
2770
2771 EV_FREQUENT_CHECK;
2772}
2773
2774void
2775ev_idle_stop (EV_P_ ev_idle *w)
2776{
2777 clear_pending (EV_A_ (W)w);
2778 if (expect_false (!ev_is_active (w)))
2779 return;
2780
2781 EV_FREQUENT_CHECK;
2782
2783 {
2784 int active = ev_active (w);
2785
2786 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2787 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2788
2789 ev_stop (EV_A_ (W)w);
2790 --idleall;
2791 }
2792
2793 EV_FREQUENT_CHECK;
2794}
2795#endif
2796
2797void
2798ev_prepare_start (EV_P_ ev_prepare *w)
2799{
2800 if (expect_false (ev_is_active (w)))
2801 return;
2802
2803 EV_FREQUENT_CHECK;
2804
2805 ev_start (EV_A_ (W)w, ++preparecnt);
2806 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2807 prepares [preparecnt - 1] = w;
2808
2809 EV_FREQUENT_CHECK;
2810}
2811
2812void
2813ev_prepare_stop (EV_P_ ev_prepare *w)
2814{
2815 clear_pending (EV_A_ (W)w);
2816 if (expect_false (!ev_is_active (w)))
2817 return;
2818
2819 EV_FREQUENT_CHECK;
2820
2821 {
2822 int active = ev_active (w);
2823
2824 prepares [active - 1] = prepares [--preparecnt];
2825 ev_active (prepares [active - 1]) = active;
2826 }
2827
2828 ev_stop (EV_A_ (W)w);
2829
2830 EV_FREQUENT_CHECK;
2831}
2832
2833void
2834ev_check_start (EV_P_ ev_check *w)
2835{
2836 if (expect_false (ev_is_active (w)))
2837 return;
2838
2839 EV_FREQUENT_CHECK;
2840
843 ev_start ((W)w, ++checkcnt); 2841 ev_start (EV_A_ (W)w, ++checkcnt);
844 array_needsize (checks, checkmax, checkcnt, ); 2842 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
845 checks [checkcnt - 1] = w; 2843 checks [checkcnt - 1] = w;
846}
847 2844
2845 EV_FREQUENT_CHECK;
2846}
2847
2848void
848void evcheck_stop (struct ev_check *w) 2849ev_check_stop (EV_P_ ev_check *w)
849{ 2850{
850 ev_clear ((W)w); 2851 clear_pending (EV_A_ (W)w);
851 if (ev_is_active (w)) 2852 if (expect_false (!ev_is_active (w)))
852 return; 2853 return;
853 2854
2855 EV_FREQUENT_CHECK;
2856
2857 {
2858 int active = ev_active (w);
2859
854 checks [w->active - 1] = checks [--checkcnt]; 2860 checks [active - 1] = checks [--checkcnt];
2861 ev_active (checks [active - 1]) = active;
2862 }
2863
855 ev_stop ((W)w); 2864 ev_stop (EV_A_ (W)w);
2865
2866 EV_FREQUENT_CHECK;
856} 2867}
2868
2869#if EV_EMBED_ENABLE
2870void noinline
2871ev_embed_sweep (EV_P_ ev_embed *w)
2872{
2873 ev_loop (w->other, EVLOOP_NONBLOCK);
2874}
2875
2876static void
2877embed_io_cb (EV_P_ ev_io *io, int revents)
2878{
2879 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2880
2881 if (ev_cb (w))
2882 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2883 else
2884 ev_loop (w->other, EVLOOP_NONBLOCK);
2885}
2886
2887static void
2888embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2889{
2890 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2891
2892 {
2893 struct ev_loop *loop = w->other;
2894
2895 while (fdchangecnt)
2896 {
2897 fd_reify (EV_A);
2898 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2899 }
2900 }
2901}
2902
2903static void
2904embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2905{
2906 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2907
2908 {
2909 struct ev_loop *loop = w->other;
2910
2911 ev_loop_fork (EV_A);
2912 }
2913}
2914
2915#if 0
2916static void
2917embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2918{
2919 ev_idle_stop (EV_A_ idle);
2920}
2921#endif
2922
2923void
2924ev_embed_start (EV_P_ ev_embed *w)
2925{
2926 if (expect_false (ev_is_active (w)))
2927 return;
2928
2929 {
2930 struct ev_loop *loop = w->other;
2931 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2932 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2933 }
2934
2935 EV_FREQUENT_CHECK;
2936
2937 ev_set_priority (&w->io, ev_priority (w));
2938 ev_io_start (EV_A_ &w->io);
2939
2940 ev_prepare_init (&w->prepare, embed_prepare_cb);
2941 ev_set_priority (&w->prepare, EV_MINPRI);
2942 ev_prepare_start (EV_A_ &w->prepare);
2943
2944 ev_fork_init (&w->fork, embed_fork_cb);
2945 ev_fork_start (EV_A_ &w->fork);
2946
2947 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2948
2949 ev_start (EV_A_ (W)w, 1);
2950
2951 EV_FREQUENT_CHECK;
2952}
2953
2954void
2955ev_embed_stop (EV_P_ ev_embed *w)
2956{
2957 clear_pending (EV_A_ (W)w);
2958 if (expect_false (!ev_is_active (w)))
2959 return;
2960
2961 EV_FREQUENT_CHECK;
2962
2963 ev_io_stop (EV_A_ &w->io);
2964 ev_prepare_stop (EV_A_ &w->prepare);
2965 ev_fork_stop (EV_A_ &w->fork);
2966
2967 EV_FREQUENT_CHECK;
2968}
2969#endif
2970
2971#if EV_FORK_ENABLE
2972void
2973ev_fork_start (EV_P_ ev_fork *w)
2974{
2975 if (expect_false (ev_is_active (w)))
2976 return;
2977
2978 EV_FREQUENT_CHECK;
2979
2980 ev_start (EV_A_ (W)w, ++forkcnt);
2981 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2982 forks [forkcnt - 1] = w;
2983
2984 EV_FREQUENT_CHECK;
2985}
2986
2987void
2988ev_fork_stop (EV_P_ ev_fork *w)
2989{
2990 clear_pending (EV_A_ (W)w);
2991 if (expect_false (!ev_is_active (w)))
2992 return;
2993
2994 EV_FREQUENT_CHECK;
2995
2996 {
2997 int active = ev_active (w);
2998
2999 forks [active - 1] = forks [--forkcnt];
3000 ev_active (forks [active - 1]) = active;
3001 }
3002
3003 ev_stop (EV_A_ (W)w);
3004
3005 EV_FREQUENT_CHECK;
3006}
3007#endif
3008
3009#if EV_ASYNC_ENABLE
3010void
3011ev_async_start (EV_P_ ev_async *w)
3012{
3013 if (expect_false (ev_is_active (w)))
3014 return;
3015
3016 evpipe_init (EV_A);
3017
3018 EV_FREQUENT_CHECK;
3019
3020 ev_start (EV_A_ (W)w, ++asynccnt);
3021 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3022 asyncs [asynccnt - 1] = w;
3023
3024 EV_FREQUENT_CHECK;
3025}
3026
3027void
3028ev_async_stop (EV_P_ ev_async *w)
3029{
3030 clear_pending (EV_A_ (W)w);
3031 if (expect_false (!ev_is_active (w)))
3032 return;
3033
3034 EV_FREQUENT_CHECK;
3035
3036 {
3037 int active = ev_active (w);
3038
3039 asyncs [active - 1] = asyncs [--asynccnt];
3040 ev_active (asyncs [active - 1]) = active;
3041 }
3042
3043 ev_stop (EV_A_ (W)w);
3044
3045 EV_FREQUENT_CHECK;
3046}
3047
3048void
3049ev_async_send (EV_P_ ev_async *w)
3050{
3051 w->sent = 1;
3052 evpipe_write (EV_A_ &gotasync);
3053}
3054#endif
857 3055
858/*****************************************************************************/ 3056/*****************************************************************************/
859 3057
860struct ev_once 3058struct ev_once
861{ 3059{
862 struct ev_io io; 3060 ev_io io;
863 struct ev_timer to; 3061 ev_timer to;
864 void (*cb)(int revents, void *arg); 3062 void (*cb)(int revents, void *arg);
865 void *arg; 3063 void *arg;
866}; 3064};
867 3065
868static void 3066static void
869once_cb (struct ev_once *once, int revents) 3067once_cb (EV_P_ struct ev_once *once, int revents)
870{ 3068{
871 void (*cb)(int revents, void *arg) = once->cb; 3069 void (*cb)(int revents, void *arg) = once->cb;
872 void *arg = once->arg; 3070 void *arg = once->arg;
873 3071
874 evio_stop (&once->io); 3072 ev_io_stop (EV_A_ &once->io);
875 evtimer_stop (&once->to); 3073 ev_timer_stop (EV_A_ &once->to);
876 free (once); 3074 ev_free (once);
877 3075
878 cb (revents, arg); 3076 cb (revents, arg);
879} 3077}
880 3078
881static void 3079static void
882once_cb_io (struct ev_io *w, int revents) 3080once_cb_io (EV_P_ ev_io *w, int revents)
883{ 3081{
884 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3082 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3083
3084 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
885} 3085}
886 3086
887static void 3087static void
888once_cb_to (struct ev_timer *w, int revents) 3088once_cb_to (EV_P_ ev_timer *w, int revents)
889{ 3089{
890 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3090 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
891}
892 3091
3092 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3093}
3094
893void 3095void
894ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3096ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
895{ 3097{
896 struct ev_once *once = malloc (sizeof (struct ev_once)); 3098 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
897 3099
898 if (!once) 3100 if (expect_false (!once))
899 cb (EV_ERROR, arg); 3101 {
900 else 3102 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
3103 return;
901 { 3104 }
3105
902 once->cb = cb; 3106 once->cb = cb;
903 once->arg = arg; 3107 once->arg = arg;
904 3108
905 evw_init (&once->io, once_cb_io); 3109 ev_init (&once->io, once_cb_io);
906
907 if (fd >= 0) 3110 if (fd >= 0)
908 { 3111 {
909 evio_set (&once->io, fd, events); 3112 ev_io_set (&once->io, fd, events);
910 evio_start (&once->io); 3113 ev_io_start (EV_A_ &once->io);
911 } 3114 }
912 3115
913 evw_init (&once->to, once_cb_to); 3116 ev_init (&once->to, once_cb_to);
914
915 if (timeout >= 0.) 3117 if (timeout >= 0.)
916 { 3118 {
917 evtimer_set (&once->to, timeout, 0.); 3119 ev_timer_set (&once->to, timeout, 0.);
918 evtimer_start (&once->to); 3120 ev_timer_start (EV_A_ &once->to);
919 }
920 }
921}
922
923/*****************************************************************************/
924
925#if 0
926
927struct ev_io wio;
928
929static void
930sin_cb (struct ev_io *w, int revents)
931{
932 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
933}
934
935static void
936ocb (struct ev_timer *w, int revents)
937{
938 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
939 evtimer_stop (w);
940 evtimer_start (w);
941}
942
943static void
944scb (struct ev_signal *w, int revents)
945{
946 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
947 evio_stop (&wio);
948 evio_start (&wio);
949}
950
951static void
952gcb (struct ev_signal *w, int revents)
953{
954 fprintf (stderr, "generic %x\n", revents);
955
956}
957
958int main (void)
959{
960 ev_init (0);
961
962 evio_init (&wio, sin_cb, 0, EV_READ);
963 evio_start (&wio);
964
965 struct ev_timer t[10000];
966
967#if 0
968 int i;
969 for (i = 0; i < 10000; ++i)
970 { 3121 }
971 struct ev_timer *w = t + i;
972 evw_init (w, ocb, i);
973 evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
974 evtimer_start (w);
975 if (drand48 () < 0.5)
976 evtimer_stop (w);
977 }
978#endif
979
980 struct ev_timer t1;
981 evtimer_init (&t1, ocb, 5, 10);
982 evtimer_start (&t1);
983
984 struct ev_signal sig;
985 evsignal_init (&sig, scb, SIGQUIT);
986 evsignal_start (&sig);
987
988 struct ev_check cw;
989 evcheck_init (&cw, gcb);
990 evcheck_start (&cw);
991
992 struct ev_idle iw;
993 evidle_init (&iw, gcb);
994 evidle_start (&iw);
995
996 ev_loop (0);
997
998 return 0;
999} 3122}
1000 3123
3124#if EV_MULTIPLICITY
3125 #include "ev_wrap.h"
1001#endif 3126#endif
1002 3127
3128#ifdef __cplusplus
3129}
3130#endif
1003 3131
1004
1005

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