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Comparing libev/ev.c (file contents):
Revision 1.23 by root, Wed Oct 31 20:10:17 2007 UTC vs.
Revision 1.283 by root, Wed Apr 15 09:51:19 2009 UTC

1/* 1/*
2 * libev event processing core, watcher management
3 *
2 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009 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 0
70# endif
71# else
72# ifndef EV_USE_MONOTONIC
73# define EV_USE_MONOTONIC 0
74# endif
75# ifndef EV_USE_REALTIME
76# define EV_USE_REALTIME 0
77# endif
78# endif
79
80# ifndef EV_USE_NANOSLEEP
81# if HAVE_NANOSLEEP
82# define EV_USE_NANOSLEEP 1
83# else
84# define EV_USE_NANOSLEEP 0
85# endif
86# endif
87
88# ifndef EV_USE_SELECT
89# if HAVE_SELECT && HAVE_SYS_SELECT_H
90# define EV_USE_SELECT 1
91# else
92# define EV_USE_SELECT 0
93# endif
94# endif
95
96# ifndef EV_USE_POLL
97# if HAVE_POLL && HAVE_POLL_H
98# define EV_USE_POLL 1
99# else
100# define EV_USE_POLL 0
101# endif
102# endif
103
104# ifndef EV_USE_EPOLL
105# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
106# define EV_USE_EPOLL 1
107# else
108# define EV_USE_EPOLL 0
109# endif
110# endif
111
112# ifndef EV_USE_KQUEUE
113# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
114# define EV_USE_KQUEUE 1
115# else
116# define EV_USE_KQUEUE 0
117# endif
118# endif
119
120# ifndef EV_USE_PORT
121# if HAVE_PORT_H && HAVE_PORT_CREATE
122# define EV_USE_PORT 1
123# else
124# define EV_USE_PORT 0
125# endif
126# endif
127
128# ifndef EV_USE_INOTIFY
129# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
130# define EV_USE_INOTIFY 1
131# else
132# define EV_USE_INOTIFY 0
133# endif
134# endif
135
136# ifndef EV_USE_EVENTFD
137# if HAVE_EVENTFD
138# define EV_USE_EVENTFD 1
139# else
140# define EV_USE_EVENTFD 0
141# endif
142# endif
143
144#endif
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/types.h> 155#include <sys/types.h>
42#include <sys/wait.h>
43#include <sys/time.h>
44#include <time.h> 156#include <time.h>
45 157
46#ifndef HAVE_MONOTONIC 158#include <signal.h>
47# ifdef CLOCK_MONOTONIC 159
48# 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
49# endif 176# endif
50#endif 177#endif
51 178
52#ifndef HAVE_SELECT 179/* this block tries to deduce configuration from header-defined symbols and defaults */
53# 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
54#endif 186# endif
187#endif
55 188
56#ifndef HAVE_EPOLL 189#ifndef EV_USE_MONOTONIC
57# 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
58#endif 194# endif
195#endif
59 196
60#ifndef HAVE_REALTIME 197#ifndef EV_USE_REALTIME
61# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ 198# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
199#endif
200
201#ifndef EV_USE_NANOSLEEP
202# if _POSIX_C_SOURCE >= 199309L
203# define EV_USE_NANOSLEEP 1
204# else
205# define EV_USE_NANOSLEEP 0
62#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 */
63 363
64#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) */
65#define MAX_BLOCKTIME 60. 365#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
66#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */ 366/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
67 367
68#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
69 378
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
70typedef struct ev_watcher *W; 395typedef ev_watcher *W;
71typedef struct ev_watcher_list *WL; 396typedef ev_watcher_list *WL;
72typedef struct ev_watcher_time *WT; 397typedef ev_watcher_time *WT;
73 398
74static 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_REALTIME
403/* sig_atomic_t is used to avoid per-thread variables or locking but still */
404/* giving it a reasonably high chance of working on typical architetcures */
405static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
406#endif
407
408#if EV_USE_MONOTONIC
409static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
410#endif
411
412#ifdef _WIN32
413# include "ev_win32.c"
414#endif
415
416/*****************************************************************************/
417
418static void (*syserr_cb)(const char *msg);
419
420void
421ev_set_syserr_cb (void (*cb)(const char *msg))
422{
423 syserr_cb = cb;
424}
425
426static void noinline
427ev_syserr (const char *msg)
428{
429 if (!msg)
430 msg = "(libev) system error";
431
432 if (syserr_cb)
433 syserr_cb (msg);
434 else
435 {
436 perror (msg);
437 abort ();
438 }
439}
440
441static void *
442ev_realloc_emul (void *ptr, long size)
443{
444 /* some systems, notably openbsd and darwin, fail to properly
445 * implement realloc (x, 0) (as required by both ansi c-98 and
446 * the single unix specification, so work around them here.
447 */
448
449 if (size)
450 return realloc (ptr, size);
451
452 free (ptr);
453 return 0;
454}
455
456static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
457
458void
459ev_set_allocator (void *(*cb)(void *ptr, long size))
460{
461 alloc = cb;
462}
463
464inline_speed void *
465ev_realloc (void *ptr, long size)
466{
467 ptr = alloc (ptr, size);
468
469 if (!ptr && size)
470 {
471 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
472 abort ();
473 }
474
475 return ptr;
476}
477
478#define ev_malloc(size) ev_realloc (0, (size))
479#define ev_free(ptr) ev_realloc ((ptr), 0)
480
481/*****************************************************************************/
482
483typedef struct
484{
485 WL head;
486 unsigned char events;
487 unsigned char reify;
488 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
489 unsigned char unused;
490#if EV_USE_EPOLL
491 unsigned int egen; /* generation counter to counter epoll bugs */
492#endif
493#if EV_SELECT_IS_WINSOCKET
494 SOCKET handle;
495#endif
496} ANFD;
497
498typedef struct
499{
500 W w;
501 int events;
502} ANPENDING;
503
504#if EV_USE_INOTIFY
505/* hash table entry per inotify-id */
506typedef struct
507{
508 WL head;
509} ANFS;
510#endif
511
512/* Heap Entry */
513#if EV_HEAP_CACHE_AT
514 typedef struct {
515 ev_tstamp at;
516 WT w;
517 } ANHE;
518
519 #define ANHE_w(he) (he).w /* access watcher, read-write */
520 #define ANHE_at(he) (he).at /* access cached at, read-only */
521 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
522#else
523 typedef WT ANHE;
524
525 #define ANHE_w(he) (he)
526 #define ANHE_at(he) (he)->at
527 #define ANHE_at_cache(he)
528#endif
529
530#if EV_MULTIPLICITY
531
532 struct ev_loop
533 {
534 ev_tstamp ev_rt_now;
535 #define ev_rt_now ((loop)->ev_rt_now)
536 #define VAR(name,decl) decl;
537 #include "ev_vars.h"
538 #undef VAR
539 };
540 #include "ev_wrap.h"
541
542 static struct ev_loop default_loop_struct;
543 struct ev_loop *ev_default_loop_ptr;
544
545#else
546
75ev_tstamp ev_now; 547 ev_tstamp ev_rt_now;
76int ev_method; 548 #define VAR(name,decl) static decl;
549 #include "ev_vars.h"
550 #undef VAR
77 551
78static int have_monotonic; /* runtime */ 552 static int ev_default_loop_ptr;
79 553
80static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 554#endif
81static void (*method_modify)(int fd, int oev, int nev);
82static void (*method_poll)(ev_tstamp timeout);
83 555
84/*****************************************************************************/ 556/*****************************************************************************/
85 557
86ev_tstamp 558ev_tstamp
87ev_time (void) 559ev_time (void)
88{ 560{
89#if HAVE_REALTIME 561#if EV_USE_REALTIME
562 if (expect_true (have_realtime))
563 {
90 struct timespec ts; 564 struct timespec ts;
91 clock_gettime (CLOCK_REALTIME, &ts); 565 clock_gettime (CLOCK_REALTIME, &ts);
92 return ts.tv_sec + ts.tv_nsec * 1e-9; 566 return ts.tv_sec + ts.tv_nsec * 1e-9;
93#else 567 }
568#endif
569
94 struct timeval tv; 570 struct timeval tv;
95 gettimeofday (&tv, 0); 571 gettimeofday (&tv, 0);
96 return tv.tv_sec + tv.tv_usec * 1e-6; 572 return tv.tv_sec + tv.tv_usec * 1e-6;
97#endif
98} 573}
99 574
100static ev_tstamp 575ev_tstamp inline_size
101get_clock (void) 576get_clock (void)
102{ 577{
103#if HAVE_MONOTONIC 578#if EV_USE_MONOTONIC
104 if (have_monotonic) 579 if (expect_true (have_monotonic))
105 { 580 {
106 struct timespec ts; 581 struct timespec ts;
107 clock_gettime (CLOCK_MONOTONIC, &ts); 582 clock_gettime (CLOCK_MONOTONIC, &ts);
108 return ts.tv_sec + ts.tv_nsec * 1e-9; 583 return ts.tv_sec + ts.tv_nsec * 1e-9;
109 } 584 }
110#endif 585#endif
111 586
112 return ev_time (); 587 return ev_time ();
113} 588}
114 589
115#define array_needsize(base,cur,cnt,init) \ 590#if EV_MULTIPLICITY
116 if ((cnt) > cur) \ 591ev_tstamp
117 { \ 592ev_now (EV_P)
118 int newcnt = cur; \ 593{
119 do \ 594 return ev_rt_now;
120 { \ 595}
121 newcnt = (newcnt << 1) | 4 & ~3; \ 596#endif
122 } \ 597
123 while ((cnt) > newcnt); \ 598void
124 \ 599ev_sleep (ev_tstamp delay)
125 base = realloc (base, sizeof (*base) * (newcnt)); \ 600{
126 init (base + cur, newcnt - cur); \ 601 if (delay > 0.)
127 cur = newcnt; \
128 } 602 {
603#if EV_USE_NANOSLEEP
604 struct timespec ts;
605
606 ts.tv_sec = (time_t)delay;
607 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
608
609 nanosleep (&ts, 0);
610#elif defined(_WIN32)
611 Sleep ((unsigned long)(delay * 1e3));
612#else
613 struct timeval tv;
614
615 tv.tv_sec = (time_t)delay;
616 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
617
618 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
619 /* somehting nto guaranteed by newer posix versions, but guaranteed */
620 /* by older ones */
621 select (0, 0, 0, 0, &tv);
622#endif
623 }
624}
129 625
130/*****************************************************************************/ 626/*****************************************************************************/
131 627
628#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
629
630int inline_size
631array_nextsize (int elem, int cur, int cnt)
632{
633 int ncur = cur + 1;
634
635 do
636 ncur <<= 1;
637 while (cnt > ncur);
638
639 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
640 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
641 {
642 ncur *= elem;
643 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
644 ncur = ncur - sizeof (void *) * 4;
645 ncur /= elem;
646 }
647
648 return ncur;
649}
650
651static noinline void *
652array_realloc (int elem, void *base, int *cur, int cnt)
653{
654 *cur = array_nextsize (elem, *cur, cnt);
655 return ev_realloc (base, elem * *cur);
656}
657
658#define array_init_zero(base,count) \
659 memset ((void *)(base), 0, sizeof (*(base)) * (count))
660
661#define array_needsize(type,base,cur,cnt,init) \
662 if (expect_false ((cnt) > (cur))) \
663 { \
664 int ocur_ = (cur); \
665 (base) = (type *)array_realloc \
666 (sizeof (type), (base), &(cur), (cnt)); \
667 init ((base) + (ocur_), (cur) - ocur_); \
668 }
669
670#if 0
671#define array_slim(type,stem) \
672 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
673 { \
674 stem ## max = array_roundsize (stem ## cnt >> 1); \
675 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
676 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
677 }
678#endif
679
680#define array_free(stem, idx) \
681 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
682
683/*****************************************************************************/
684
685void noinline
686ev_feed_event (EV_P_ void *w, int revents)
687{
688 W w_ = (W)w;
689 int pri = ABSPRI (w_);
690
691 if (expect_false (w_->pending))
692 pendings [pri][w_->pending - 1].events |= revents;
693 else
694 {
695 w_->pending = ++pendingcnt [pri];
696 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
697 pendings [pri][w_->pending - 1].w = w_;
698 pendings [pri][w_->pending - 1].events = revents;
699 }
700}
701
702void inline_speed
703queue_events (EV_P_ W *events, int eventcnt, int type)
704{
705 int i;
706
707 for (i = 0; i < eventcnt; ++i)
708 ev_feed_event (EV_A_ events [i], type);
709}
710
711/*****************************************************************************/
712
713void inline_speed
714fd_event (EV_P_ int fd, int revents)
715{
716 ANFD *anfd = anfds + fd;
717 ev_io *w;
718
719 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
720 {
721 int ev = w->events & revents;
722
723 if (ev)
724 ev_feed_event (EV_A_ (W)w, ev);
725 }
726}
727
728void
729ev_feed_fd_event (EV_P_ int fd, int revents)
730{
731 if (fd >= 0 && fd < anfdmax)
732 fd_event (EV_A_ fd, revents);
733}
734
735void inline_size
736fd_reify (EV_P)
737{
738 int i;
739
740 for (i = 0; i < fdchangecnt; ++i)
741 {
742 int fd = fdchanges [i];
743 ANFD *anfd = anfds + fd;
744 ev_io *w;
745
746 unsigned char events = 0;
747
748 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
749 events |= (unsigned char)w->events;
750
751#if EV_SELECT_IS_WINSOCKET
752 if (events)
753 {
754 unsigned long arg;
755 #ifdef EV_FD_TO_WIN32_HANDLE
756 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
757 #else
758 anfd->handle = _get_osfhandle (fd);
759 #endif
760 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
761 }
762#endif
763
764 {
765 unsigned char o_events = anfd->events;
766 unsigned char o_reify = anfd->reify;
767
768 anfd->reify = 0;
769 anfd->events = events;
770
771 if (o_events != events || o_reify & EV__IOFDSET)
772 backend_modify (EV_A_ fd, o_events, events);
773 }
774 }
775
776 fdchangecnt = 0;
777}
778
779void inline_size
780fd_change (EV_P_ int fd, int flags)
781{
782 unsigned char reify = anfds [fd].reify;
783 anfds [fd].reify |= flags;
784
785 if (expect_true (!reify))
786 {
787 ++fdchangecnt;
788 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
789 fdchanges [fdchangecnt - 1] = fd;
790 }
791}
792
793void inline_speed
794fd_kill (EV_P_ int fd)
795{
796 ev_io *w;
797
798 while ((w = (ev_io *)anfds [fd].head))
799 {
800 ev_io_stop (EV_A_ w);
801 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
802 }
803}
804
805int inline_size
806fd_valid (int fd)
807{
808#ifdef _WIN32
809 return _get_osfhandle (fd) != -1;
810#else
811 return fcntl (fd, F_GETFD) != -1;
812#endif
813}
814
815/* called on EBADF to verify fds */
816static void noinline
817fd_ebadf (EV_P)
818{
819 int fd;
820
821 for (fd = 0; fd < anfdmax; ++fd)
822 if (anfds [fd].events)
823 if (!fd_valid (fd) && errno == EBADF)
824 fd_kill (EV_A_ fd);
825}
826
827/* called on ENOMEM in select/poll to kill some fds and retry */
828static void noinline
829fd_enomem (EV_P)
830{
831 int fd;
832
833 for (fd = anfdmax; fd--; )
834 if (anfds [fd].events)
835 {
836 fd_kill (EV_A_ fd);
837 return;
838 }
839}
840
841/* usually called after fork if backend needs to re-arm all fds from scratch */
842static void noinline
843fd_rearm_all (EV_P)
844{
845 int fd;
846
847 for (fd = 0; fd < anfdmax; ++fd)
848 if (anfds [fd].events)
849 {
850 anfds [fd].events = 0;
851 anfds [fd].emask = 0;
852 fd_change (EV_A_ fd, EV__IOFDSET | 1);
853 }
854}
855
856/*****************************************************************************/
857
858/*
859 * the heap functions want a real array index. array index 0 uis guaranteed to not
860 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
861 * the branching factor of the d-tree.
862 */
863
864/*
865 * at the moment we allow libev the luxury of two heaps,
866 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
867 * which is more cache-efficient.
868 * the difference is about 5% with 50000+ watchers.
869 */
870#if EV_USE_4HEAP
871
872#define DHEAP 4
873#define HEAP0 (DHEAP - 1) /* index of first element in heap */
874#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
875#define UPHEAP_DONE(p,k) ((p) == (k))
876
877/* away from the root */
878void inline_speed
879downheap (ANHE *heap, int N, int k)
880{
881 ANHE he = heap [k];
882 ANHE *E = heap + N + HEAP0;
883
884 for (;;)
885 {
886 ev_tstamp minat;
887 ANHE *minpos;
888 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
889
890 /* find minimum child */
891 if (expect_true (pos + DHEAP - 1 < E))
892 {
893 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
894 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
895 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
896 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
897 }
898 else if (pos < E)
899 {
900 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
901 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
902 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
903 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
904 }
905 else
906 break;
907
908 if (ANHE_at (he) <= minat)
909 break;
910
911 heap [k] = *minpos;
912 ev_active (ANHE_w (*minpos)) = k;
913
914 k = minpos - heap;
915 }
916
917 heap [k] = he;
918 ev_active (ANHE_w (he)) = k;
919}
920
921#else /* 4HEAP */
922
923#define HEAP0 1
924#define HPARENT(k) ((k) >> 1)
925#define UPHEAP_DONE(p,k) (!(p))
926
927/* away from the root */
928void inline_speed
929downheap (ANHE *heap, int N, int k)
930{
931 ANHE he = heap [k];
932
933 for (;;)
934 {
935 int c = k << 1;
936
937 if (c > N + HEAP0 - 1)
938 break;
939
940 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
941 ? 1 : 0;
942
943 if (ANHE_at (he) <= ANHE_at (heap [c]))
944 break;
945
946 heap [k] = heap [c];
947 ev_active (ANHE_w (heap [k])) = k;
948
949 k = c;
950 }
951
952 heap [k] = he;
953 ev_active (ANHE_w (he)) = k;
954}
955#endif
956
957/* towards the root */
958void inline_speed
959upheap (ANHE *heap, int k)
960{
961 ANHE he = heap [k];
962
963 for (;;)
964 {
965 int p = HPARENT (k);
966
967 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
968 break;
969
970 heap [k] = heap [p];
971 ev_active (ANHE_w (heap [k])) = k;
972 k = p;
973 }
974
975 heap [k] = he;
976 ev_active (ANHE_w (he)) = k;
977}
978
979void inline_size
980adjustheap (ANHE *heap, int N, int k)
981{
982 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
983 upheap (heap, k);
984 else
985 downheap (heap, N, k);
986}
987
988/* rebuild the heap: this function is used only once and executed rarely */
989void inline_size
990reheap (ANHE *heap, int N)
991{
992 int i;
993
994 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
995 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
996 for (i = 0; i < N; ++i)
997 upheap (heap, i + HEAP0);
998}
999
1000/*****************************************************************************/
1001
132typedef struct 1002typedef struct
133{ 1003{
134 struct ev_io *head; 1004 WL head;
135 unsigned char wev, rev; /* want, received event set */ 1005 EV_ATOMIC_T gotsig;
136} ANFD;
137
138static ANFD *anfds;
139static int anfdmax;
140
141static int *fdchanges;
142static int fdchangemax, fdchangecnt;
143
144static void
145anfds_init (ANFD *base, int count)
146{
147 while (count--)
148 {
149 base->head = 0;
150 base->wev = base->rev = EV_NONE;
151 ++base;
152 }
153}
154
155typedef struct
156{
157 W w;
158 int events;
159} ANPENDING;
160
161static ANPENDING *pendings;
162static int pendingmax, pendingcnt;
163
164static void
165event (W w, int events)
166{
167 if (w->active)
168 {
169 w->pending = ++pendingcnt;
170 array_needsize (pendings, pendingmax, pendingcnt, );
171 pendings [pendingcnt - 1].w = w;
172 pendings [pendingcnt - 1].events = events;
173 }
174}
175
176static void
177fd_event (int fd, int events)
178{
179 ANFD *anfd = anfds + fd;
180 struct ev_io *w;
181
182 for (w = anfd->head; w; w = w->next)
183 {
184 int ev = w->events & events;
185
186 if (ev)
187 event ((W)w, ev);
188 }
189}
190
191static void
192queue_events (W *events, int eventcnt, int type)
193{
194 int i;
195
196 for (i = 0; i < eventcnt; ++i)
197 event (events [i], type);
198}
199
200/* called on EBADF to verify fds */
201static void
202fd_recheck ()
203{
204 int fd;
205
206 for (fd = 0; fd < anfdmax; ++fd)
207 if (anfds [fd].wev)
208 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
209 while (anfds [fd].head)
210 evio_stop (anfds [fd].head);
211}
212
213/*****************************************************************************/
214
215static struct ev_timer **timers;
216static int timermax, timercnt;
217
218static struct ev_periodic **periodics;
219static int periodicmax, periodiccnt;
220
221static void
222upheap (WT *timers, int k)
223{
224 WT w = timers [k];
225
226 while (k && timers [k >> 1]->at > w->at)
227 {
228 timers [k] = timers [k >> 1];
229 timers [k]->active = k + 1;
230 k >>= 1;
231 }
232
233 timers [k] = w;
234 timers [k]->active = k + 1;
235
236}
237
238static void
239downheap (WT *timers, int N, int k)
240{
241 WT w = timers [k];
242
243 while (k < (N >> 1))
244 {
245 int j = k << 1;
246
247 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
248 ++j;
249
250 if (w->at <= timers [j]->at)
251 break;
252
253 timers [k] = timers [j];
254 timers [k]->active = k + 1;
255 k = j;
256 }
257
258 timers [k] = w;
259 timers [k]->active = k + 1;
260}
261
262/*****************************************************************************/
263
264typedef struct
265{
266 struct ev_signal *head;
267 sig_atomic_t gotsig;
268} ANSIG; 1006} ANSIG;
269 1007
270static ANSIG *signals; 1008static ANSIG *signals;
271static int signalmax; 1009static int signalmax;
272 1010
273static int sigpipe [2]; 1011static EV_ATOMIC_T gotsig;
274static sig_atomic_t gotsig; 1012
275static struct ev_io sigev; 1013/*****************************************************************************/
1014
1015void inline_speed
1016fd_intern (int fd)
1017{
1018#ifdef _WIN32
1019 unsigned long arg = 1;
1020 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1021#else
1022 fcntl (fd, F_SETFD, FD_CLOEXEC);
1023 fcntl (fd, F_SETFL, O_NONBLOCK);
1024#endif
1025}
1026
1027static void noinline
1028evpipe_init (EV_P)
1029{
1030 if (!ev_is_active (&pipeev))
1031 {
1032#if EV_USE_EVENTFD
1033 if ((evfd = eventfd (0, 0)) >= 0)
1034 {
1035 evpipe [0] = -1;
1036 fd_intern (evfd);
1037 ev_io_set (&pipeev, evfd, EV_READ);
1038 }
1039 else
1040#endif
1041 {
1042 while (pipe (evpipe))
1043 ev_syserr ("(libev) error creating signal/async pipe");
1044
1045 fd_intern (evpipe [0]);
1046 fd_intern (evpipe [1]);
1047 ev_io_set (&pipeev, evpipe [0], EV_READ);
1048 }
1049
1050 ev_io_start (EV_A_ &pipeev);
1051 ev_unref (EV_A); /* watcher should not keep loop alive */
1052 }
1053}
1054
1055void inline_size
1056evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1057{
1058 if (!*flag)
1059 {
1060 int old_errno = errno; /* save errno because write might clobber it */
1061
1062 *flag = 1;
1063
1064#if EV_USE_EVENTFD
1065 if (evfd >= 0)
1066 {
1067 uint64_t counter = 1;
1068 write (evfd, &counter, sizeof (uint64_t));
1069 }
1070 else
1071#endif
1072 write (evpipe [1], &old_errno, 1);
1073
1074 errno = old_errno;
1075 }
1076}
276 1077
277static void 1078static void
278signals_init (ANSIG *base, int count) 1079pipecb (EV_P_ ev_io *iow, int revents)
279{ 1080{
280 while (count--) 1081#if EV_USE_EVENTFD
1082 if (evfd >= 0)
1083 {
1084 uint64_t counter;
1085 read (evfd, &counter, sizeof (uint64_t));
281 { 1086 }
282 base->head = 0; 1087 else
1088#endif
1089 {
1090 char dummy;
1091 read (evpipe [0], &dummy, 1);
1092 }
1093
1094 if (gotsig && ev_is_default_loop (EV_A))
1095 {
1096 int signum;
283 base->gotsig = 0; 1097 gotsig = 0;
284 ++base; 1098
1099 for (signum = signalmax; signum--; )
1100 if (signals [signum].gotsig)
1101 ev_feed_signal_event (EV_A_ signum + 1);
1102 }
1103
1104#if EV_ASYNC_ENABLE
1105 if (gotasync)
285 } 1106 {
1107 int i;
1108 gotasync = 0;
1109
1110 for (i = asynccnt; i--; )
1111 if (asyncs [i]->sent)
1112 {
1113 asyncs [i]->sent = 0;
1114 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1115 }
1116 }
1117#endif
286} 1118}
1119
1120/*****************************************************************************/
287 1121
288static void 1122static void
289sighandler (int signum) 1123ev_sighandler (int signum)
290{ 1124{
1125#if EV_MULTIPLICITY
1126 struct ev_loop *loop = &default_loop_struct;
1127#endif
1128
1129#if _WIN32
1130 signal (signum, ev_sighandler);
1131#endif
1132
291 signals [signum - 1].gotsig = 1; 1133 signals [signum - 1].gotsig = 1;
292 1134 evpipe_write (EV_A_ &gotsig);
293 if (!gotsig)
294 {
295 gotsig = 1;
296 write (sigpipe [1], &gotsig, 1);
297 }
298} 1135}
299 1136
300static void 1137void noinline
301sigcb (struct ev_io *iow, int revents) 1138ev_feed_signal_event (EV_P_ int signum)
302{ 1139{
303 struct ev_signal *w; 1140 WL w;
304 int sig;
305 1141
306 gotsig = 0; 1142#if EV_MULTIPLICITY
307 read (sigpipe [0], &revents, 1); 1143 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1144#endif
308 1145
309 for (sig = signalmax; sig--; ) 1146 --signum;
310 if (signals [sig].gotsig) 1147
311 { 1148 if (signum < 0 || signum >= signalmax)
1149 return;
1150
312 signals [sig].gotsig = 0; 1151 signals [signum].gotsig = 0;
313 1152
314 for (w = signals [sig].head; w; w = w->next) 1153 for (w = signals [signum].head; w; w = w->next)
315 event ((W)w, EV_SIGNAL); 1154 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
316 }
317}
318
319static void
320siginit (void)
321{
322 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
323 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
324
325 /* rather than sort out wether we really need nb, set it */
326 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
327 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
328
329 evio_set (&sigev, sigpipe [0], EV_READ);
330 evio_start (&sigev);
331} 1155}
332 1156
333/*****************************************************************************/ 1157/*****************************************************************************/
334 1158
335static struct ev_idle **idles; 1159static WL childs [EV_PID_HASHSIZE];
336static int idlemax, idlecnt;
337 1160
338static struct ev_prepare **prepares; 1161#ifndef _WIN32
339static int preparemax, preparecnt;
340 1162
341static struct ev_check **checks;
342static int checkmax, checkcnt;
343
344/*****************************************************************************/
345
346static struct ev_child *childs [PID_HASHSIZE];
347static struct ev_signal childev; 1163static ev_signal childev;
1164
1165#ifndef WIFCONTINUED
1166# define WIFCONTINUED(status) 0
1167#endif
1168
1169void inline_speed
1170child_reap (EV_P_ int chain, int pid, int status)
1171{
1172 ev_child *w;
1173 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1174
1175 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1176 {
1177 if ((w->pid == pid || !w->pid)
1178 && (!traced || (w->flags & 1)))
1179 {
1180 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1181 w->rpid = pid;
1182 w->rstatus = status;
1183 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1184 }
1185 }
1186}
348 1187
349#ifndef WCONTINUED 1188#ifndef WCONTINUED
350# define WCONTINUED 0 1189# define WCONTINUED 0
351#endif 1190#endif
352 1191
353static void 1192static void
354childcb (struct ev_signal *sw, int revents) 1193childcb (EV_P_ ev_signal *sw, int revents)
355{ 1194{
356 struct ev_child *w;
357 int pid, status; 1195 int pid, status;
358 1196
1197 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
359 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1198 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
360 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1199 if (!WCONTINUED
361 if (w->pid == pid || w->pid == -1) 1200 || errno != EINVAL
1201 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1202 return;
1203
1204 /* make sure we are called again until all children have been reaped */
1205 /* we need to do it this way so that the callback gets called before we continue */
1206 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1207
1208 child_reap (EV_A_ pid, pid, status);
1209 if (EV_PID_HASHSIZE > 1)
1210 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1211}
1212
1213#endif
1214
1215/*****************************************************************************/
1216
1217#if EV_USE_PORT
1218# include "ev_port.c"
1219#endif
1220#if EV_USE_KQUEUE
1221# include "ev_kqueue.c"
1222#endif
1223#if EV_USE_EPOLL
1224# include "ev_epoll.c"
1225#endif
1226#if EV_USE_POLL
1227# include "ev_poll.c"
1228#endif
1229#if EV_USE_SELECT
1230# include "ev_select.c"
1231#endif
1232
1233int
1234ev_version_major (void)
1235{
1236 return EV_VERSION_MAJOR;
1237}
1238
1239int
1240ev_version_minor (void)
1241{
1242 return EV_VERSION_MINOR;
1243}
1244
1245/* return true if we are running with elevated privileges and should ignore env variables */
1246int inline_size
1247enable_secure (void)
1248{
1249#ifdef _WIN32
1250 return 0;
1251#else
1252 return getuid () != geteuid ()
1253 || getgid () != getegid ();
1254#endif
1255}
1256
1257unsigned int
1258ev_supported_backends (void)
1259{
1260 unsigned int flags = 0;
1261
1262 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1263 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1264 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1265 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1266 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1267
1268 return flags;
1269}
1270
1271unsigned int
1272ev_recommended_backends (void)
1273{
1274 unsigned int flags = ev_supported_backends ();
1275
1276#ifndef __NetBSD__
1277 /* kqueue is borked on everything but netbsd apparently */
1278 /* it usually doesn't work correctly on anything but sockets and pipes */
1279 flags &= ~EVBACKEND_KQUEUE;
1280#endif
1281#ifdef __APPLE__
1282 /* only select works correctly on that "unix-certified" platform */
1283 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1284 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1285#endif
1286
1287 return flags;
1288}
1289
1290unsigned int
1291ev_embeddable_backends (void)
1292{
1293 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1294
1295 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1296 /* please fix it and tell me how to detect the fix */
1297 flags &= ~EVBACKEND_EPOLL;
1298
1299 return flags;
1300}
1301
1302unsigned int
1303ev_backend (EV_P)
1304{
1305 return backend;
1306}
1307
1308unsigned int
1309ev_loop_count (EV_P)
1310{
1311 return loop_count;
1312}
1313
1314void
1315ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1316{
1317 io_blocktime = interval;
1318}
1319
1320void
1321ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1322{
1323 timeout_blocktime = interval;
1324}
1325
1326static void noinline
1327loop_init (EV_P_ unsigned int flags)
1328{
1329 if (!backend)
1330 {
1331#if EV_USE_REALTIME
1332 if (!have_realtime)
362 { 1333 {
363 w->status = status; 1334 struct timespec ts;
364 event ((W)w, EV_CHILD); 1335
1336 if (!clock_gettime (CLOCK_REALTIME, &ts))
1337 have_realtime = 1;
365 } 1338 }
1339#endif
1340
1341#if EV_USE_MONOTONIC
1342 if (!have_monotonic)
1343 {
1344 struct timespec ts;
1345
1346 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1347 have_monotonic = 1;
1348 }
1349#endif
1350
1351 ev_rt_now = ev_time ();
1352 mn_now = get_clock ();
1353 now_floor = mn_now;
1354 rtmn_diff = ev_rt_now - mn_now;
1355
1356 io_blocktime = 0.;
1357 timeout_blocktime = 0.;
1358 backend = 0;
1359 backend_fd = -1;
1360 gotasync = 0;
1361#if EV_USE_INOTIFY
1362 fs_fd = -2;
1363#endif
1364
1365 /* pid check not overridable via env */
1366#ifndef _WIN32
1367 if (flags & EVFLAG_FORKCHECK)
1368 curpid = getpid ();
1369#endif
1370
1371 if (!(flags & EVFLAG_NOENV)
1372 && !enable_secure ()
1373 && getenv ("LIBEV_FLAGS"))
1374 flags = atoi (getenv ("LIBEV_FLAGS"));
1375
1376 if (!(flags & 0x0000ffffU))
1377 flags |= ev_recommended_backends ();
1378
1379#if EV_USE_PORT
1380 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1381#endif
1382#if EV_USE_KQUEUE
1383 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1384#endif
1385#if EV_USE_EPOLL
1386 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1387#endif
1388#if EV_USE_POLL
1389 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1390#endif
1391#if EV_USE_SELECT
1392 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1393#endif
1394
1395 ev_init (&pipeev, pipecb);
1396 ev_set_priority (&pipeev, EV_MAXPRI);
1397 }
1398}
1399
1400static void noinline
1401loop_destroy (EV_P)
1402{
1403 int i;
1404
1405 if (ev_is_active (&pipeev))
1406 {
1407 ev_ref (EV_A); /* signal watcher */
1408 ev_io_stop (EV_A_ &pipeev);
1409
1410#if EV_USE_EVENTFD
1411 if (evfd >= 0)
1412 close (evfd);
1413#endif
1414
1415 if (evpipe [0] >= 0)
1416 {
1417 close (evpipe [0]);
1418 close (evpipe [1]);
1419 }
1420 }
1421
1422#if EV_USE_INOTIFY
1423 if (fs_fd >= 0)
1424 close (fs_fd);
1425#endif
1426
1427 if (backend_fd >= 0)
1428 close (backend_fd);
1429
1430#if EV_USE_PORT
1431 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1432#endif
1433#if EV_USE_KQUEUE
1434 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1435#endif
1436#if EV_USE_EPOLL
1437 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1438#endif
1439#if EV_USE_POLL
1440 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1441#endif
1442#if EV_USE_SELECT
1443 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1444#endif
1445
1446 for (i = NUMPRI; i--; )
1447 {
1448 array_free (pending, [i]);
1449#if EV_IDLE_ENABLE
1450 array_free (idle, [i]);
1451#endif
1452 }
1453
1454 ev_free (anfds); anfdmax = 0;
1455
1456 /* have to use the microsoft-never-gets-it-right macro */
1457 array_free (fdchange, EMPTY);
1458 array_free (timer, EMPTY);
1459#if EV_PERIODIC_ENABLE
1460 array_free (periodic, EMPTY);
1461#endif
1462#if EV_FORK_ENABLE
1463 array_free (fork, EMPTY);
1464#endif
1465 array_free (prepare, EMPTY);
1466 array_free (check, EMPTY);
1467#if EV_ASYNC_ENABLE
1468 array_free (async, EMPTY);
1469#endif
1470
1471 backend = 0;
1472}
1473
1474#if EV_USE_INOTIFY
1475void inline_size infy_fork (EV_P);
1476#endif
1477
1478void inline_size
1479loop_fork (EV_P)
1480{
1481#if EV_USE_PORT
1482 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1483#endif
1484#if EV_USE_KQUEUE
1485 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1486#endif
1487#if EV_USE_EPOLL
1488 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1489#endif
1490#if EV_USE_INOTIFY
1491 infy_fork (EV_A);
1492#endif
1493
1494 if (ev_is_active (&pipeev))
1495 {
1496 /* this "locks" the handlers against writing to the pipe */
1497 /* while we modify the fd vars */
1498 gotsig = 1;
1499#if EV_ASYNC_ENABLE
1500 gotasync = 1;
1501#endif
1502
1503 ev_ref (EV_A);
1504 ev_io_stop (EV_A_ &pipeev);
1505
1506#if EV_USE_EVENTFD
1507 if (evfd >= 0)
1508 close (evfd);
1509#endif
1510
1511 if (evpipe [0] >= 0)
1512 {
1513 close (evpipe [0]);
1514 close (evpipe [1]);
1515 }
1516
1517 evpipe_init (EV_A);
1518 /* now iterate over everything, in case we missed something */
1519 pipecb (EV_A_ &pipeev, EV_READ);
1520 }
1521
1522 postfork = 0;
1523}
1524
1525#if EV_MULTIPLICITY
1526
1527struct ev_loop *
1528ev_loop_new (unsigned int flags)
1529{
1530 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1531
1532 memset (loop, 0, sizeof (struct ev_loop));
1533
1534 loop_init (EV_A_ flags);
1535
1536 if (ev_backend (EV_A))
1537 return loop;
1538
1539 return 0;
1540}
1541
1542void
1543ev_loop_destroy (EV_P)
1544{
1545 loop_destroy (EV_A);
1546 ev_free (loop);
1547}
1548
1549void
1550ev_loop_fork (EV_P)
1551{
1552 postfork = 1; /* must be in line with ev_default_fork */
1553}
1554
1555#if EV_VERIFY
1556static void noinline
1557verify_watcher (EV_P_ W w)
1558{
1559 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1560
1561 if (w->pending)
1562 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1563}
1564
1565static void noinline
1566verify_heap (EV_P_ ANHE *heap, int N)
1567{
1568 int i;
1569
1570 for (i = HEAP0; i < N + HEAP0; ++i)
1571 {
1572 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1573 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1574 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1575
1576 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1577 }
1578}
1579
1580static void noinline
1581array_verify (EV_P_ W *ws, int cnt)
1582{
1583 while (cnt--)
1584 {
1585 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1586 verify_watcher (EV_A_ ws [cnt]);
1587 }
1588}
1589#endif
1590
1591void
1592ev_loop_verify (EV_P)
1593{
1594#if EV_VERIFY
1595 int i;
1596 WL w;
1597
1598 assert (activecnt >= -1);
1599
1600 assert (fdchangemax >= fdchangecnt);
1601 for (i = 0; i < fdchangecnt; ++i)
1602 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1603
1604 assert (anfdmax >= 0);
1605 for (i = 0; i < anfdmax; ++i)
1606 for (w = anfds [i].head; w; w = w->next)
1607 {
1608 verify_watcher (EV_A_ (W)w);
1609 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1610 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1611 }
1612
1613 assert (timermax >= timercnt);
1614 verify_heap (EV_A_ timers, timercnt);
1615
1616#if EV_PERIODIC_ENABLE
1617 assert (periodicmax >= periodiccnt);
1618 verify_heap (EV_A_ periodics, periodiccnt);
1619#endif
1620
1621 for (i = NUMPRI; i--; )
1622 {
1623 assert (pendingmax [i] >= pendingcnt [i]);
1624#if EV_IDLE_ENABLE
1625 assert (idleall >= 0);
1626 assert (idlemax [i] >= idlecnt [i]);
1627 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1628#endif
1629 }
1630
1631#if EV_FORK_ENABLE
1632 assert (forkmax >= forkcnt);
1633 array_verify (EV_A_ (W *)forks, forkcnt);
1634#endif
1635
1636#if EV_ASYNC_ENABLE
1637 assert (asyncmax >= asynccnt);
1638 array_verify (EV_A_ (W *)asyncs, asynccnt);
1639#endif
1640
1641 assert (preparemax >= preparecnt);
1642 array_verify (EV_A_ (W *)prepares, preparecnt);
1643
1644 assert (checkmax >= checkcnt);
1645 array_verify (EV_A_ (W *)checks, checkcnt);
1646
1647# if 0
1648 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1649 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1650# endif
1651#endif
1652}
1653
1654#endif /* multiplicity */
1655
1656#if EV_MULTIPLICITY
1657struct ev_loop *
1658ev_default_loop_init (unsigned int flags)
1659#else
1660int
1661ev_default_loop (unsigned int flags)
1662#endif
1663{
1664 if (!ev_default_loop_ptr)
1665 {
1666#if EV_MULTIPLICITY
1667 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1668#else
1669 ev_default_loop_ptr = 1;
1670#endif
1671
1672 loop_init (EV_A_ flags);
1673
1674 if (ev_backend (EV_A))
1675 {
1676#ifndef _WIN32
1677 ev_signal_init (&childev, childcb, SIGCHLD);
1678 ev_set_priority (&childev, EV_MAXPRI);
1679 ev_signal_start (EV_A_ &childev);
1680 ev_unref (EV_A); /* child watcher should not keep loop alive */
1681#endif
1682 }
1683 else
1684 ev_default_loop_ptr = 0;
1685 }
1686
1687 return ev_default_loop_ptr;
1688}
1689
1690void
1691ev_default_destroy (void)
1692{
1693#if EV_MULTIPLICITY
1694 struct ev_loop *loop = ev_default_loop_ptr;
1695#endif
1696
1697 ev_default_loop_ptr = 0;
1698
1699#ifndef _WIN32
1700 ev_ref (EV_A); /* child watcher */
1701 ev_signal_stop (EV_A_ &childev);
1702#endif
1703
1704 loop_destroy (EV_A);
1705}
1706
1707void
1708ev_default_fork (void)
1709{
1710#if EV_MULTIPLICITY
1711 struct ev_loop *loop = ev_default_loop_ptr;
1712#endif
1713
1714 postfork = 1; /* must be in line with ev_loop_fork */
366} 1715}
367 1716
368/*****************************************************************************/ 1717/*****************************************************************************/
369 1718
370#if HAVE_EPOLL 1719void
371# include "ev_epoll.c" 1720ev_invoke (EV_P_ void *w, int revents)
372#endif
373#if HAVE_SELECT
374# include "ev_select.c"
375#endif
376
377int ev_init (int flags)
378{ 1721{
379 if (!ev_method) 1722 EV_CB_INVOKE ((W)w, revents);
380 { 1723}
381#if HAVE_MONOTONIC 1724
1725void inline_speed
1726call_pending (EV_P)
1727{
1728 int pri;
1729
1730 for (pri = NUMPRI; pri--; )
1731 while (pendingcnt [pri])
382 { 1732 {
383 struct timespec ts; 1733 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
384 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1734
385 have_monotonic = 1; 1735 if (expect_true (p->w))
1736 {
1737 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1738
1739 p->w->pending = 0;
1740 EV_CB_INVOKE (p->w, p->events);
1741 EV_FREQUENT_CHECK;
1742 }
386 } 1743 }
387#endif 1744}
388 1745
389 ev_now = ev_time (); 1746#if EV_IDLE_ENABLE
390 now = get_clock (); 1747void inline_size
391 diff = ev_now - now; 1748idle_reify (EV_P)
1749{
1750 if (expect_false (idleall))
1751 {
1752 int pri;
392 1753
393 if (pipe (sigpipe)) 1754 for (pri = NUMPRI; pri--; )
394 return 0;
395
396 ev_method = EVMETHOD_NONE;
397#if HAVE_EPOLL
398 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
399#endif
400#if HAVE_SELECT
401 if (ev_method == EVMETHOD_NONE) select_init (flags);
402#endif
403
404 if (ev_method)
405 { 1755 {
406 evw_init (&sigev, sigcb); 1756 if (pendingcnt [pri])
407 siginit (); 1757 break;
408 1758
409 evsignal_init (&childev, childcb, SIGCHLD); 1759 if (idlecnt [pri])
410 evsignal_start (&childev); 1760 {
1761 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1762 break;
1763 }
411 } 1764 }
412 } 1765 }
413
414 return ev_method;
415} 1766}
416
417/*****************************************************************************/
418
419void ev_prefork (void)
420{
421 /* nop */
422}
423
424void ev_postfork_parent (void)
425{
426 /* nop */
427}
428
429void ev_postfork_child (void)
430{
431#if HAVE_EPOLL
432 if (ev_method == EVMETHOD_EPOLL)
433 epoll_postfork_child ();
434#endif 1767#endif
435 1768
436 evio_stop (&sigev); 1769void inline_size
437 close (sigpipe [0]);
438 close (sigpipe [1]);
439 pipe (sigpipe);
440 siginit ();
441}
442
443/*****************************************************************************/
444
445static void
446fd_reify (void)
447{
448 int i;
449
450 for (i = 0; i < fdchangecnt; ++i)
451 {
452 int fd = fdchanges [i];
453 ANFD *anfd = anfds + fd;
454 struct ev_io *w;
455
456 int wev = 0;
457
458 for (w = anfd->head; w; w = w->next)
459 wev |= w->events;
460
461 if (anfd->wev != wev)
462 {
463 method_modify (fd, anfd->wev, wev);
464 anfd->wev = wev;
465 }
466 }
467
468 fdchangecnt = 0;
469}
470
471static void
472call_pending ()
473{
474 while (pendingcnt)
475 {
476 ANPENDING *p = pendings + --pendingcnt;
477
478 if (p->w)
479 {
480 p->w->pending = 0;
481 p->w->cb (p->w, p->events);
482 }
483 }
484}
485
486static void
487timers_reify () 1770timers_reify (EV_P)
488{ 1771{
1772 EV_FREQUENT_CHECK;
1773
489 while (timercnt && timers [0]->at <= now) 1774 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
490 { 1775 {
491 struct ev_timer *w = timers [0]; 1776 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
492 1777
493 event ((W)w, EV_TIMEOUT); 1778 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
494 1779
495 /* first reschedule or stop timer */ 1780 /* first reschedule or stop timer */
496 if (w->repeat) 1781 if (w->repeat)
497 { 1782 {
498 w->at = now + w->repeat; 1783 ev_at (w) += w->repeat;
499 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1784 if (ev_at (w) < mn_now)
1785 ev_at (w) = mn_now;
1786
1787 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1788
1789 ANHE_at_cache (timers [HEAP0]);
500 downheap ((WT *)timers, timercnt, 0); 1790 downheap (timers, timercnt, HEAP0);
501 } 1791 }
502 else 1792 else
503 evtimer_stop (w); /* nonrepeating: stop timer */ 1793 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
504 }
505}
506 1794
507static void 1795 EV_FREQUENT_CHECK;
1796 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1797 }
1798}
1799
1800#if EV_PERIODIC_ENABLE
1801void inline_size
508periodics_reify () 1802periodics_reify (EV_P)
509{ 1803{
1804 EV_FREQUENT_CHECK;
1805
510 while (periodiccnt && periodics [0]->at <= ev_now) 1806 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
511 { 1807 {
512 struct ev_periodic *w = periodics [0]; 1808 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1809
1810 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
513 1811
514 /* first reschedule or stop timer */ 1812 /* first reschedule or stop timer */
515 if (w->interval) 1813 if (w->reschedule_cb)
516 { 1814 {
517 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1815 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
518 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1816
1817 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1818
1819 ANHE_at_cache (periodics [HEAP0]);
519 downheap ((WT *)periodics, periodiccnt, 0); 1820 downheap (periodics, periodiccnt, HEAP0);
1821 }
1822 else if (w->interval)
1823 {
1824 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1825 /* if next trigger time is not sufficiently in the future, put it there */
1826 /* this might happen because of floating point inexactness */
1827 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1828 {
1829 ev_at (w) += w->interval;
1830
1831 /* if interval is unreasonably low we might still have a time in the past */
1832 /* so correct this. this will make the periodic very inexact, but the user */
1833 /* has effectively asked to get triggered more often than possible */
1834 if (ev_at (w) < ev_rt_now)
1835 ev_at (w) = ev_rt_now;
1836 }
1837
1838 ANHE_at_cache (periodics [HEAP0]);
1839 downheap (periodics, periodiccnt, HEAP0);
520 } 1840 }
521 else 1841 else
522 evperiodic_stop (w); /* nonrepeating: stop timer */ 1842 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
523 1843
524 event ((W)w, EV_TIMEOUT); 1844 EV_FREQUENT_CHECK;
1845 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
525 } 1846 }
526} 1847}
527 1848
528static void 1849static void noinline
529periodics_reschedule (ev_tstamp diff) 1850periodics_reschedule (EV_P)
530{ 1851{
531 int i; 1852 int i;
532 1853
533 /* adjust periodics after time jump */ 1854 /* adjust periodics after time jump */
534 for (i = 0; i < periodiccnt; ++i) 1855 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
535 { 1856 {
536 struct ev_periodic *w = periodics [i]; 1857 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
537 1858
1859 if (w->reschedule_cb)
1860 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
538 if (w->interval) 1861 else if (w->interval)
1862 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1863
1864 ANHE_at_cache (periodics [i]);
1865 }
1866
1867 reheap (periodics, periodiccnt);
1868}
1869#endif
1870
1871void inline_speed
1872time_update (EV_P_ ev_tstamp max_block)
1873{
1874 int i;
1875
1876#if EV_USE_MONOTONIC
1877 if (expect_true (have_monotonic))
1878 {
1879 ev_tstamp odiff = rtmn_diff;
1880
1881 mn_now = get_clock ();
1882
1883 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1884 /* interpolate in the meantime */
1885 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
539 { 1886 {
540 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1887 ev_rt_now = rtmn_diff + mn_now;
1888 return;
1889 }
541 1890
542 if (fabs (diff) >= 1e-4) 1891 now_floor = mn_now;
1892 ev_rt_now = ev_time ();
1893
1894 /* loop a few times, before making important decisions.
1895 * on the choice of "4": one iteration isn't enough,
1896 * in case we get preempted during the calls to
1897 * ev_time and get_clock. a second call is almost guaranteed
1898 * to succeed in that case, though. and looping a few more times
1899 * doesn't hurt either as we only do this on time-jumps or
1900 * in the unlikely event of having been preempted here.
1901 */
1902 for (i = 4; --i; )
1903 {
1904 rtmn_diff = ev_rt_now - mn_now;
1905
1906 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1907 return; /* all is well */
1908
1909 ev_rt_now = ev_time ();
1910 mn_now = get_clock ();
1911 now_floor = mn_now;
1912 }
1913
1914# if EV_PERIODIC_ENABLE
1915 periodics_reschedule (EV_A);
1916# endif
1917 /* no timer adjustment, as the monotonic clock doesn't jump */
1918 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1919 }
1920 else
1921#endif
1922 {
1923 ev_rt_now = ev_time ();
1924
1925 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1926 {
1927#if EV_PERIODIC_ENABLE
1928 periodics_reschedule (EV_A);
1929#endif
1930 /* adjust timers. this is easy, as the offset is the same for all of them */
1931 for (i = 0; i < timercnt; ++i)
543 { 1932 {
544 evperiodic_stop (w); 1933 ANHE *he = timers + i + HEAP0;
545 evperiodic_start (w); 1934 ANHE_w (*he)->at += ev_rt_now - mn_now;
546 1935 ANHE_at_cache (*he);
547 i = 0; /* restart loop, inefficient, but time jumps should be rare */
548 } 1936 }
549 } 1937 }
550 }
551}
552 1938
553static void 1939 mn_now = ev_rt_now;
554time_update ()
555{
556 int i;
557
558 ev_now = ev_time ();
559
560 if (have_monotonic)
561 { 1940 }
562 ev_tstamp odiff = diff; 1941}
563 1942
564 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1943void
1944ev_ref (EV_P)
1945{
1946 ++activecnt;
1947}
1948
1949void
1950ev_unref (EV_P)
1951{
1952 --activecnt;
1953}
1954
1955void
1956ev_now_update (EV_P)
1957{
1958 time_update (EV_A_ 1e100);
1959}
1960
1961static int loop_done;
1962
1963void
1964ev_loop (EV_P_ int flags)
1965{
1966 loop_done = EVUNLOOP_CANCEL;
1967
1968 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1969
1970 do
1971 {
1972#if EV_VERIFY >= 2
1973 ev_loop_verify (EV_A);
1974#endif
1975
1976#ifndef _WIN32
1977 if (expect_false (curpid)) /* penalise the forking check even more */
1978 if (expect_false (getpid () != curpid))
1979 {
1980 curpid = getpid ();
1981 postfork = 1;
1982 }
1983#endif
1984
1985#if EV_FORK_ENABLE
1986 /* we might have forked, so queue fork handlers */
1987 if (expect_false (postfork))
1988 if (forkcnt)
1989 {
1990 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1991 call_pending (EV_A);
1992 }
1993#endif
1994
1995 /* queue prepare watchers (and execute them) */
1996 if (expect_false (preparecnt))
565 { 1997 {
566 now = get_clock (); 1998 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
567 diff = ev_now - now; 1999 call_pending (EV_A);
568
569 if (fabs (odiff - diff) < MIN_TIMEJUMP)
570 return; /* all is well */
571
572 ev_now = ev_time ();
573 } 2000 }
574 2001
575 periodics_reschedule (diff - odiff); 2002 /* we might have forked, so reify kernel state if necessary */
576 /* no timer adjustment, as the monotonic clock doesn't jump */ 2003 if (expect_false (postfork))
577 } 2004 loop_fork (EV_A);
578 else
579 {
580 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
581 {
582 periodics_reschedule (ev_now - now);
583
584 /* adjust timers. this is easy, as the offset is the same for all */
585 for (i = 0; i < timercnt; ++i)
586 timers [i]->at += diff;
587 }
588
589 now = ev_now;
590 }
591}
592
593int ev_loop_done;
594
595void ev_loop (int flags)
596{
597 double block;
598 ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
599
600 do
601 {
602 /* queue check watchers (and execute them) */
603 if (preparecnt)
604 {
605 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
606 call_pending ();
607 }
608 2005
609 /* update fd-related kernel structures */ 2006 /* update fd-related kernel structures */
610 fd_reify (); 2007 fd_reify (EV_A);
611 2008
612 /* calculate blocking time */ 2009 /* calculate blocking time */
2010 {
2011 ev_tstamp waittime = 0.;
2012 ev_tstamp sleeptime = 0.;
613 2013
614 /* we only need this for !monotonic clockor timers, but as we basically 2014 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
615 always have timers, we just calculate it always */
616 ev_now = ev_time ();
617
618 if (flags & EVLOOP_NONBLOCK || idlecnt)
619 block = 0.;
620 else
621 { 2015 {
2016 /* update time to cancel out callback processing overhead */
2017 time_update (EV_A_ 1e100);
2018
622 block = MAX_BLOCKTIME; 2019 waittime = MAX_BLOCKTIME;
623 2020
624 if (timercnt) 2021 if (timercnt)
625 { 2022 {
626 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 2023 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
627 if (block > to) block = to; 2024 if (waittime > to) waittime = to;
628 } 2025 }
629 2026
2027#if EV_PERIODIC_ENABLE
630 if (periodiccnt) 2028 if (periodiccnt)
631 { 2029 {
632 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 2030 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
633 if (block > to) block = to; 2031 if (waittime > to) waittime = to;
634 } 2032 }
2033#endif
635 2034
636 if (block < 0.) block = 0.; 2035 if (expect_false (waittime < timeout_blocktime))
2036 waittime = timeout_blocktime;
2037
2038 sleeptime = waittime - backend_fudge;
2039
2040 if (expect_true (sleeptime > io_blocktime))
2041 sleeptime = io_blocktime;
2042
2043 if (sleeptime)
2044 {
2045 ev_sleep (sleeptime);
2046 waittime -= sleeptime;
2047 }
637 } 2048 }
638 2049
639 method_poll (block); 2050 ++loop_count;
2051 backend_poll (EV_A_ waittime);
640 2052
641 /* update ev_now, do magic */ 2053 /* update ev_rt_now, do magic */
642 time_update (); 2054 time_update (EV_A_ waittime + sleeptime);
2055 }
643 2056
644 /* queue pending timers and reschedule them */ 2057 /* queue pending timers and reschedule them */
645 timers_reify (); /* relative timers called last */ 2058 timers_reify (EV_A); /* relative timers called last */
2059#if EV_PERIODIC_ENABLE
646 periodics_reify (); /* absolute timers called first */ 2060 periodics_reify (EV_A); /* absolute timers called first */
2061#endif
647 2062
2063#if EV_IDLE_ENABLE
648 /* queue idle watchers unless io or timers are pending */ 2064 /* queue idle watchers unless other events are pending */
649 if (!pendingcnt) 2065 idle_reify (EV_A);
650 queue_events ((W *)idles, idlecnt, EV_IDLE); 2066#endif
651 2067
652 /* queue check watchers, to be executed first */ 2068 /* queue check watchers, to be executed first */
653 if (checkcnt) 2069 if (expect_false (checkcnt))
654 queue_events ((W *)checks, checkcnt, EV_CHECK); 2070 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
655 2071
656 call_pending (); 2072 call_pending (EV_A);
657 } 2073 }
658 while (!ev_loop_done); 2074 while (expect_true (
2075 activecnt
2076 && !loop_done
2077 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2078 ));
659 2079
660 if (ev_loop_done != 2) 2080 if (loop_done == EVUNLOOP_ONE)
2081 loop_done = EVUNLOOP_CANCEL;
2082}
2083
2084void
2085ev_unloop (EV_P_ int how)
2086{
661 ev_loop_done = 0; 2087 loop_done = how;
662} 2088}
663 2089
664/*****************************************************************************/ 2090/*****************************************************************************/
665 2091
666static void 2092void inline_size
667wlist_add (WL *head, WL elem) 2093wlist_add (WL *head, WL elem)
668{ 2094{
669 elem->next = *head; 2095 elem->next = *head;
670 *head = elem; 2096 *head = elem;
671} 2097}
672 2098
673static void 2099void inline_size
674wlist_del (WL *head, WL elem) 2100wlist_del (WL *head, WL elem)
675{ 2101{
676 while (*head) 2102 while (*head)
677 { 2103 {
678 if (*head == elem) 2104 if (*head == elem)
… …
683 2109
684 head = &(*head)->next; 2110 head = &(*head)->next;
685 } 2111 }
686} 2112}
687 2113
688static void 2114void inline_speed
689ev_clear (W w) 2115clear_pending (EV_P_ W w)
690{ 2116{
691 if (w->pending) 2117 if (w->pending)
692 { 2118 {
693 pendings [w->pending - 1].w = 0; 2119 pendings [ABSPRI (w)][w->pending - 1].w = 0;
694 w->pending = 0; 2120 w->pending = 0;
695 } 2121 }
696} 2122}
697 2123
698static void 2124int
2125ev_clear_pending (EV_P_ void *w)
2126{
2127 W w_ = (W)w;
2128 int pending = w_->pending;
2129
2130 if (expect_true (pending))
2131 {
2132 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2133 w_->pending = 0;
2134 p->w = 0;
2135 return p->events;
2136 }
2137 else
2138 return 0;
2139}
2140
2141void inline_size
2142pri_adjust (EV_P_ W w)
2143{
2144 int pri = w->priority;
2145 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2146 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2147 w->priority = pri;
2148}
2149
2150void inline_speed
699ev_start (W w, int active) 2151ev_start (EV_P_ W w, int active)
700{ 2152{
2153 pri_adjust (EV_A_ w);
701 w->active = active; 2154 w->active = active;
2155 ev_ref (EV_A);
702} 2156}
703 2157
704static void 2158void inline_size
705ev_stop (W w) 2159ev_stop (EV_P_ W w)
706{ 2160{
2161 ev_unref (EV_A);
707 w->active = 0; 2162 w->active = 0;
708} 2163}
709 2164
710/*****************************************************************************/ 2165/*****************************************************************************/
711 2166
712void 2167void noinline
713evio_start (struct ev_io *w) 2168ev_io_start (EV_P_ ev_io *w)
714{ 2169{
2170 int fd = w->fd;
2171
715 if (ev_is_active (w)) 2172 if (expect_false (ev_is_active (w)))
716 return; 2173 return;
717 2174
718 int fd = w->fd; 2175 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2176 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
719 2177
2178 EV_FREQUENT_CHECK;
2179
720 ev_start ((W)w, 1); 2180 ev_start (EV_A_ (W)w, 1);
721 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2181 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
722 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2182 wlist_add (&anfds[fd].head, (WL)w);
723 2183
724 ++fdchangecnt; 2184 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
725 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 2185 w->events &= ~EV__IOFDSET;
726 fdchanges [fdchangecnt - 1] = fd;
727}
728 2186
729void 2187 EV_FREQUENT_CHECK;
2188}
2189
2190void noinline
730evio_stop (struct ev_io *w) 2191ev_io_stop (EV_P_ ev_io *w)
731{ 2192{
732 ev_clear ((W)w); 2193 clear_pending (EV_A_ (W)w);
733 if (!ev_is_active (w)) 2194 if (expect_false (!ev_is_active (w)))
734 return; 2195 return;
735 2196
2197 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2198
2199 EV_FREQUENT_CHECK;
2200
736 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2201 wlist_del (&anfds[w->fd].head, (WL)w);
737 ev_stop ((W)w); 2202 ev_stop (EV_A_ (W)w);
738 2203
739 ++fdchangecnt; 2204 fd_change (EV_A_ w->fd, 1);
740 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
741 fdchanges [fdchangecnt - 1] = w->fd;
742}
743 2205
744void 2206 EV_FREQUENT_CHECK;
2207}
2208
2209void noinline
745evtimer_start (struct ev_timer *w) 2210ev_timer_start (EV_P_ ev_timer *w)
746{ 2211{
747 if (ev_is_active (w)) 2212 if (expect_false (ev_is_active (w)))
748 return; 2213 return;
749 2214
750 w->at += now; 2215 ev_at (w) += mn_now;
751 2216
752 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 2217 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
753 2218
754 ev_start ((W)w, ++timercnt); 2219 EV_FREQUENT_CHECK;
755 array_needsize (timers, timermax, timercnt, );
756 timers [timercnt - 1] = w;
757 upheap ((WT *)timers, timercnt - 1);
758}
759 2220
760void 2221 ++timercnt;
2222 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2223 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2224 ANHE_w (timers [ev_active (w)]) = (WT)w;
2225 ANHE_at_cache (timers [ev_active (w)]);
2226 upheap (timers, ev_active (w));
2227
2228 EV_FREQUENT_CHECK;
2229
2230 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2231}
2232
2233void noinline
761evtimer_stop (struct ev_timer *w) 2234ev_timer_stop (EV_P_ ev_timer *w)
762{ 2235{
763 ev_clear ((W)w); 2236 clear_pending (EV_A_ (W)w);
764 if (!ev_is_active (w)) 2237 if (expect_false (!ev_is_active (w)))
765 return; 2238 return;
766 2239
767 if (w->active < timercnt--) 2240 EV_FREQUENT_CHECK;
2241
2242 {
2243 int active = ev_active (w);
2244
2245 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2246
2247 --timercnt;
2248
2249 if (expect_true (active < timercnt + HEAP0))
768 { 2250 {
769 timers [w->active - 1] = timers [timercnt]; 2251 timers [active] = timers [timercnt + HEAP0];
770 downheap ((WT *)timers, timercnt, w->active - 1); 2252 adjustheap (timers, timercnt, active);
771 } 2253 }
2254 }
772 2255
773 w->at = w->repeat; 2256 EV_FREQUENT_CHECK;
774 2257
2258 ev_at (w) -= mn_now;
2259
775 ev_stop ((W)w); 2260 ev_stop (EV_A_ (W)w);
776} 2261}
777 2262
778void 2263void noinline
779evtimer_again (struct ev_timer *w) 2264ev_timer_again (EV_P_ ev_timer *w)
780{ 2265{
2266 EV_FREQUENT_CHECK;
2267
781 if (ev_is_active (w)) 2268 if (ev_is_active (w))
782 { 2269 {
783 if (w->repeat) 2270 if (w->repeat)
784 { 2271 {
785 w->at = now + w->repeat; 2272 ev_at (w) = mn_now + w->repeat;
2273 ANHE_at_cache (timers [ev_active (w)]);
786 downheap ((WT *)timers, timercnt, w->active - 1); 2274 adjustheap (timers, timercnt, ev_active (w));
787 } 2275 }
788 else 2276 else
789 evtimer_stop (w); 2277 ev_timer_stop (EV_A_ w);
790 } 2278 }
791 else if (w->repeat) 2279 else if (w->repeat)
2280 {
2281 ev_at (w) = w->repeat;
792 evtimer_start (w); 2282 ev_timer_start (EV_A_ w);
793} 2283 }
794 2284
795void 2285 EV_FREQUENT_CHECK;
2286}
2287
2288#if EV_PERIODIC_ENABLE
2289void noinline
796evperiodic_start (struct ev_periodic *w) 2290ev_periodic_start (EV_P_ ev_periodic *w)
797{ 2291{
798 if (ev_is_active (w)) 2292 if (expect_false (ev_is_active (w)))
799 return; 2293 return;
800 2294
801 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 2295 if (w->reschedule_cb)
802 2296 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2297 else if (w->interval)
2298 {
2299 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
803 /* this formula differs from the one in periodic_reify because we do not always round up */ 2300 /* this formula differs from the one in periodic_reify because we do not always round up */
804 if (w->interval)
805 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 2301 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2302 }
2303 else
2304 ev_at (w) = w->offset;
806 2305
2306 EV_FREQUENT_CHECK;
2307
2308 ++periodiccnt;
807 ev_start ((W)w, ++periodiccnt); 2309 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
808 array_needsize (periodics, periodicmax, periodiccnt, ); 2310 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
809 periodics [periodiccnt - 1] = w; 2311 ANHE_w (periodics [ev_active (w)]) = (WT)w;
810 upheap ((WT *)periodics, periodiccnt - 1); 2312 ANHE_at_cache (periodics [ev_active (w)]);
811} 2313 upheap (periodics, ev_active (w));
812 2314
813void 2315 EV_FREQUENT_CHECK;
2316
2317 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2318}
2319
2320void noinline
814evperiodic_stop (struct ev_periodic *w) 2321ev_periodic_stop (EV_P_ ev_periodic *w)
815{ 2322{
816 ev_clear ((W)w); 2323 clear_pending (EV_A_ (W)w);
817 if (!ev_is_active (w)) 2324 if (expect_false (!ev_is_active (w)))
818 return; 2325 return;
819 2326
820 if (w->active < periodiccnt--) 2327 EV_FREQUENT_CHECK;
2328
2329 {
2330 int active = ev_active (w);
2331
2332 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2333
2334 --periodiccnt;
2335
2336 if (expect_true (active < periodiccnt + HEAP0))
821 { 2337 {
822 periodics [w->active - 1] = periodics [periodiccnt]; 2338 periodics [active] = periodics [periodiccnt + HEAP0];
823 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2339 adjustheap (periodics, periodiccnt, active);
824 } 2340 }
2341 }
825 2342
2343 EV_FREQUENT_CHECK;
2344
826 ev_stop ((W)w); 2345 ev_stop (EV_A_ (W)w);
827} 2346}
828 2347
829void 2348void noinline
2349ev_periodic_again (EV_P_ ev_periodic *w)
2350{
2351 /* TODO: use adjustheap and recalculation */
2352 ev_periodic_stop (EV_A_ w);
2353 ev_periodic_start (EV_A_ w);
2354}
2355#endif
2356
2357#ifndef SA_RESTART
2358# define SA_RESTART 0
2359#endif
2360
2361void noinline
830evsignal_start (struct ev_signal *w) 2362ev_signal_start (EV_P_ ev_signal *w)
831{ 2363{
2364#if EV_MULTIPLICITY
2365 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2366#endif
832 if (ev_is_active (w)) 2367 if (expect_false (ev_is_active (w)))
833 return; 2368 return;
834 2369
2370 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2371
2372 evpipe_init (EV_A);
2373
2374 EV_FREQUENT_CHECK;
2375
2376 {
2377#ifndef _WIN32
2378 sigset_t full, prev;
2379 sigfillset (&full);
2380 sigprocmask (SIG_SETMASK, &full, &prev);
2381#endif
2382
2383 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2384
2385#ifndef _WIN32
2386 sigprocmask (SIG_SETMASK, &prev, 0);
2387#endif
2388 }
2389
835 ev_start ((W)w, 1); 2390 ev_start (EV_A_ (W)w, 1);
836 array_needsize (signals, signalmax, w->signum, signals_init);
837 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2391 wlist_add (&signals [w->signum - 1].head, (WL)w);
838 2392
839 if (!w->next) 2393 if (!((WL)w)->next)
840 { 2394 {
2395#if _WIN32
2396 signal (w->signum, ev_sighandler);
2397#else
841 struct sigaction sa; 2398 struct sigaction sa;
842 sa.sa_handler = sighandler; 2399 sa.sa_handler = ev_sighandler;
843 sigfillset (&sa.sa_mask); 2400 sigfillset (&sa.sa_mask);
844 sa.sa_flags = 0; 2401 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
845 sigaction (w->signum, &sa, 0); 2402 sigaction (w->signum, &sa, 0);
2403#endif
846 } 2404 }
847}
848 2405
849void 2406 EV_FREQUENT_CHECK;
2407}
2408
2409void noinline
850evsignal_stop (struct ev_signal *w) 2410ev_signal_stop (EV_P_ ev_signal *w)
851{ 2411{
852 ev_clear ((W)w); 2412 clear_pending (EV_A_ (W)w);
853 if (!ev_is_active (w)) 2413 if (expect_false (!ev_is_active (w)))
854 return; 2414 return;
855 2415
2416 EV_FREQUENT_CHECK;
2417
856 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2418 wlist_del (&signals [w->signum - 1].head, (WL)w);
857 ev_stop ((W)w); 2419 ev_stop (EV_A_ (W)w);
858 2420
859 if (!signals [w->signum - 1].head) 2421 if (!signals [w->signum - 1].head)
860 signal (w->signum, SIG_DFL); 2422 signal (w->signum, SIG_DFL);
861}
862 2423
863void evidle_start (struct ev_idle *w) 2424 EV_FREQUENT_CHECK;
2425}
2426
2427void
2428ev_child_start (EV_P_ ev_child *w)
864{ 2429{
2430#if EV_MULTIPLICITY
2431 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2432#endif
865 if (ev_is_active (w)) 2433 if (expect_false (ev_is_active (w)))
866 return; 2434 return;
867 2435
868 ev_start ((W)w, ++idlecnt); 2436 EV_FREQUENT_CHECK;
869 array_needsize (idles, idlemax, idlecnt, );
870 idles [idlecnt - 1] = w;
871}
872 2437
873void evidle_stop (struct ev_idle *w) 2438 ev_start (EV_A_ (W)w, 1);
2439 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2440
2441 EV_FREQUENT_CHECK;
2442}
2443
2444void
2445ev_child_stop (EV_P_ ev_child *w)
874{ 2446{
875 ev_clear ((W)w); 2447 clear_pending (EV_A_ (W)w);
876 if (ev_is_active (w)) 2448 if (expect_false (!ev_is_active (w)))
877 return; 2449 return;
878 2450
879 idles [w->active - 1] = idles [--idlecnt]; 2451 EV_FREQUENT_CHECK;
2452
2453 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
880 ev_stop ((W)w); 2454 ev_stop (EV_A_ (W)w);
881}
882 2455
883void evprepare_start (struct ev_prepare *w) 2456 EV_FREQUENT_CHECK;
2457}
2458
2459#if EV_STAT_ENABLE
2460
2461# ifdef _WIN32
2462# undef lstat
2463# define lstat(a,b) _stati64 (a,b)
2464# endif
2465
2466#define DEF_STAT_INTERVAL 5.0074891
2467#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2468#define MIN_STAT_INTERVAL 0.1074891
2469
2470static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2471
2472#if EV_USE_INOTIFY
2473# define EV_INOTIFY_BUFSIZE 8192
2474
2475static void noinline
2476infy_add (EV_P_ ev_stat *w)
884{ 2477{
885 if (ev_is_active (w)) 2478 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);
2479
2480 if (w->wd < 0)
2481 {
2482 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2483 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2484
2485 /* monitor some parent directory for speedup hints */
2486 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2487 /* but an efficiency issue only */
2488 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2489 {
2490 char path [4096];
2491 strcpy (path, w->path);
2492
2493 do
2494 {
2495 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2496 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2497
2498 char *pend = strrchr (path, '/');
2499
2500 if (!pend || pend == path)
2501 break;
2502
2503 *pend = 0;
2504 w->wd = inotify_add_watch (fs_fd, path, mask);
2505 }
2506 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2507 }
2508 }
2509
2510 if (w->wd >= 0)
2511 {
2512 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2513
2514 /* now local changes will be tracked by inotify, but remote changes won't */
2515 /* unless the filesystem it known to be local, we therefore still poll */
2516 /* also do poll on <2.6.25, but with normal frequency */
2517 struct statfs sfs;
2518
2519 if (fs_2625 && !statfs (w->path, &sfs))
2520 if (sfs.f_type == 0x1373 /* devfs */
2521 || sfs.f_type == 0xEF53 /* ext2/3 */
2522 || sfs.f_type == 0x3153464a /* jfs */
2523 || sfs.f_type == 0x52654973 /* reiser3 */
2524 || sfs.f_type == 0x01021994 /* tempfs */
2525 || sfs.f_type == 0x58465342 /* xfs */)
2526 return;
2527
2528 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2529 ev_timer_again (EV_A_ &w->timer);
2530 }
2531}
2532
2533static void noinline
2534infy_del (EV_P_ ev_stat *w)
2535{
2536 int slot;
2537 int wd = w->wd;
2538
2539 if (wd < 0)
886 return; 2540 return;
887 2541
2542 w->wd = -2;
2543 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2544 wlist_del (&fs_hash [slot].head, (WL)w);
2545
2546 /* remove this watcher, if others are watching it, they will rearm */
2547 inotify_rm_watch (fs_fd, wd);
2548}
2549
2550static void noinline
2551infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2552{
2553 if (slot < 0)
2554 /* overflow, need to check for all hash slots */
2555 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2556 infy_wd (EV_A_ slot, wd, ev);
2557 else
2558 {
2559 WL w_;
2560
2561 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2562 {
2563 ev_stat *w = (ev_stat *)w_;
2564 w_ = w_->next; /* lets us remove this watcher and all before it */
2565
2566 if (w->wd == wd || wd == -1)
2567 {
2568 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2569 {
2570 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2571 w->wd = -1;
2572 infy_add (EV_A_ w); /* re-add, no matter what */
2573 }
2574
2575 stat_timer_cb (EV_A_ &w->timer, 0);
2576 }
2577 }
2578 }
2579}
2580
2581static void
2582infy_cb (EV_P_ ev_io *w, int revents)
2583{
2584 char buf [EV_INOTIFY_BUFSIZE];
2585 struct inotify_event *ev = (struct inotify_event *)buf;
2586 int ofs;
2587 int len = read (fs_fd, buf, sizeof (buf));
2588
2589 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2590 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2591}
2592
2593void inline_size
2594check_2625 (EV_P)
2595{
2596 /* kernels < 2.6.25 are borked
2597 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2598 */
2599 struct utsname buf;
2600 int major, minor, micro;
2601
2602 if (uname (&buf))
2603 return;
2604
2605 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2606 return;
2607
2608 if (major < 2
2609 || (major == 2 && minor < 6)
2610 || (major == 2 && minor == 6 && micro < 25))
2611 return;
2612
2613 fs_2625 = 1;
2614}
2615
2616void inline_size
2617infy_init (EV_P)
2618{
2619 if (fs_fd != -2)
2620 return;
2621
2622 fs_fd = -1;
2623
2624 check_2625 (EV_A);
2625
2626 fs_fd = inotify_init ();
2627
2628 if (fs_fd >= 0)
2629 {
2630 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2631 ev_set_priority (&fs_w, EV_MAXPRI);
2632 ev_io_start (EV_A_ &fs_w);
2633 }
2634}
2635
2636void inline_size
2637infy_fork (EV_P)
2638{
2639 int slot;
2640
2641 if (fs_fd < 0)
2642 return;
2643
2644 close (fs_fd);
2645 fs_fd = inotify_init ();
2646
2647 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2648 {
2649 WL w_ = fs_hash [slot].head;
2650 fs_hash [slot].head = 0;
2651
2652 while (w_)
2653 {
2654 ev_stat *w = (ev_stat *)w_;
2655 w_ = w_->next; /* lets us add this watcher */
2656
2657 w->wd = -1;
2658
2659 if (fs_fd >= 0)
2660 infy_add (EV_A_ w); /* re-add, no matter what */
2661 else
2662 ev_timer_again (EV_A_ &w->timer);
2663 }
2664 }
2665}
2666
2667#endif
2668
2669#ifdef _WIN32
2670# define EV_LSTAT(p,b) _stati64 (p, b)
2671#else
2672# define EV_LSTAT(p,b) lstat (p, b)
2673#endif
2674
2675void
2676ev_stat_stat (EV_P_ ev_stat *w)
2677{
2678 if (lstat (w->path, &w->attr) < 0)
2679 w->attr.st_nlink = 0;
2680 else if (!w->attr.st_nlink)
2681 w->attr.st_nlink = 1;
2682}
2683
2684static void noinline
2685stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2686{
2687 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2688
2689 /* we copy this here each the time so that */
2690 /* prev has the old value when the callback gets invoked */
2691 w->prev = w->attr;
2692 ev_stat_stat (EV_A_ w);
2693
2694 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2695 if (
2696 w->prev.st_dev != w->attr.st_dev
2697 || w->prev.st_ino != w->attr.st_ino
2698 || w->prev.st_mode != w->attr.st_mode
2699 || w->prev.st_nlink != w->attr.st_nlink
2700 || w->prev.st_uid != w->attr.st_uid
2701 || w->prev.st_gid != w->attr.st_gid
2702 || w->prev.st_rdev != w->attr.st_rdev
2703 || w->prev.st_size != w->attr.st_size
2704 || w->prev.st_atime != w->attr.st_atime
2705 || w->prev.st_mtime != w->attr.st_mtime
2706 || w->prev.st_ctime != w->attr.st_ctime
2707 ) {
2708 #if EV_USE_INOTIFY
2709 if (fs_fd >= 0)
2710 {
2711 infy_del (EV_A_ w);
2712 infy_add (EV_A_ w);
2713 ev_stat_stat (EV_A_ w); /* avoid race... */
2714 }
2715 #endif
2716
2717 ev_feed_event (EV_A_ w, EV_STAT);
2718 }
2719}
2720
2721void
2722ev_stat_start (EV_P_ ev_stat *w)
2723{
2724 if (expect_false (ev_is_active (w)))
2725 return;
2726
2727 ev_stat_stat (EV_A_ w);
2728
2729 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2730 w->interval = MIN_STAT_INTERVAL;
2731
2732 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2733 ev_set_priority (&w->timer, ev_priority (w));
2734
2735#if EV_USE_INOTIFY
2736 infy_init (EV_A);
2737
2738 if (fs_fd >= 0)
2739 infy_add (EV_A_ w);
2740 else
2741#endif
2742 ev_timer_again (EV_A_ &w->timer);
2743
2744 ev_start (EV_A_ (W)w, 1);
2745
2746 EV_FREQUENT_CHECK;
2747}
2748
2749void
2750ev_stat_stop (EV_P_ ev_stat *w)
2751{
2752 clear_pending (EV_A_ (W)w);
2753 if (expect_false (!ev_is_active (w)))
2754 return;
2755
2756 EV_FREQUENT_CHECK;
2757
2758#if EV_USE_INOTIFY
2759 infy_del (EV_A_ w);
2760#endif
2761 ev_timer_stop (EV_A_ &w->timer);
2762
2763 ev_stop (EV_A_ (W)w);
2764
2765 EV_FREQUENT_CHECK;
2766}
2767#endif
2768
2769#if EV_IDLE_ENABLE
2770void
2771ev_idle_start (EV_P_ ev_idle *w)
2772{
2773 if (expect_false (ev_is_active (w)))
2774 return;
2775
2776 pri_adjust (EV_A_ (W)w);
2777
2778 EV_FREQUENT_CHECK;
2779
2780 {
2781 int active = ++idlecnt [ABSPRI (w)];
2782
2783 ++idleall;
2784 ev_start (EV_A_ (W)w, active);
2785
2786 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2787 idles [ABSPRI (w)][active - 1] = w;
2788 }
2789
2790 EV_FREQUENT_CHECK;
2791}
2792
2793void
2794ev_idle_stop (EV_P_ ev_idle *w)
2795{
2796 clear_pending (EV_A_ (W)w);
2797 if (expect_false (!ev_is_active (w)))
2798 return;
2799
2800 EV_FREQUENT_CHECK;
2801
2802 {
2803 int active = ev_active (w);
2804
2805 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2806 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2807
2808 ev_stop (EV_A_ (W)w);
2809 --idleall;
2810 }
2811
2812 EV_FREQUENT_CHECK;
2813}
2814#endif
2815
2816void
2817ev_prepare_start (EV_P_ ev_prepare *w)
2818{
2819 if (expect_false (ev_is_active (w)))
2820 return;
2821
2822 EV_FREQUENT_CHECK;
2823
888 ev_start ((W)w, ++preparecnt); 2824 ev_start (EV_A_ (W)w, ++preparecnt);
889 array_needsize (prepares, preparemax, preparecnt, ); 2825 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
890 prepares [preparecnt - 1] = w; 2826 prepares [preparecnt - 1] = w;
891}
892 2827
2828 EV_FREQUENT_CHECK;
2829}
2830
2831void
893void evprepare_stop (struct ev_prepare *w) 2832ev_prepare_stop (EV_P_ ev_prepare *w)
894{ 2833{
895 ev_clear ((W)w); 2834 clear_pending (EV_A_ (W)w);
896 if (ev_is_active (w)) 2835 if (expect_false (!ev_is_active (w)))
897 return; 2836 return;
898 2837
2838 EV_FREQUENT_CHECK;
2839
2840 {
2841 int active = ev_active (w);
2842
899 prepares [w->active - 1] = prepares [--preparecnt]; 2843 prepares [active - 1] = prepares [--preparecnt];
2844 ev_active (prepares [active - 1]) = active;
2845 }
2846
900 ev_stop ((W)w); 2847 ev_stop (EV_A_ (W)w);
901}
902 2848
2849 EV_FREQUENT_CHECK;
2850}
2851
2852void
903void evcheck_start (struct ev_check *w) 2853ev_check_start (EV_P_ ev_check *w)
904{ 2854{
905 if (ev_is_active (w)) 2855 if (expect_false (ev_is_active (w)))
906 return; 2856 return;
907 2857
2858 EV_FREQUENT_CHECK;
2859
908 ev_start ((W)w, ++checkcnt); 2860 ev_start (EV_A_ (W)w, ++checkcnt);
909 array_needsize (checks, checkmax, checkcnt, ); 2861 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
910 checks [checkcnt - 1] = w; 2862 checks [checkcnt - 1] = w;
911}
912 2863
2864 EV_FREQUENT_CHECK;
2865}
2866
2867void
913void evcheck_stop (struct ev_check *w) 2868ev_check_stop (EV_P_ ev_check *w)
914{ 2869{
915 ev_clear ((W)w); 2870 clear_pending (EV_A_ (W)w);
916 if (ev_is_active (w)) 2871 if (expect_false (!ev_is_active (w)))
917 return; 2872 return;
918 2873
2874 EV_FREQUENT_CHECK;
2875
2876 {
2877 int active = ev_active (w);
2878
919 checks [w->active - 1] = checks [--checkcnt]; 2879 checks [active - 1] = checks [--checkcnt];
2880 ev_active (checks [active - 1]) = active;
2881 }
2882
920 ev_stop ((W)w); 2883 ev_stop (EV_A_ (W)w);
921}
922 2884
923void evchild_start (struct ev_child *w) 2885 EV_FREQUENT_CHECK;
2886}
2887
2888#if EV_EMBED_ENABLE
2889void noinline
2890ev_embed_sweep (EV_P_ ev_embed *w)
924{ 2891{
2892 ev_loop (w->other, EVLOOP_NONBLOCK);
2893}
2894
2895static void
2896embed_io_cb (EV_P_ ev_io *io, int revents)
2897{
2898 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2899
925 if (ev_is_active (w)) 2900 if (ev_cb (w))
2901 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2902 else
2903 ev_loop (w->other, EVLOOP_NONBLOCK);
2904}
2905
2906static void
2907embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2908{
2909 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2910
2911 {
2912 struct ev_loop *loop = w->other;
2913
2914 while (fdchangecnt)
2915 {
2916 fd_reify (EV_A);
2917 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2918 }
2919 }
2920}
2921
2922static void
2923embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2924{
2925 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2926
2927 ev_embed_stop (EV_A_ w);
2928
2929 {
2930 struct ev_loop *loop = w->other;
2931
2932 ev_loop_fork (EV_A);
2933 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2934 }
2935
2936 ev_embed_start (EV_A_ w);
2937}
2938
2939#if 0
2940static void
2941embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2942{
2943 ev_idle_stop (EV_A_ idle);
2944}
2945#endif
2946
2947void
2948ev_embed_start (EV_P_ ev_embed *w)
2949{
2950 if (expect_false (ev_is_active (w)))
926 return; 2951 return;
927 2952
2953 {
2954 struct ev_loop *loop = w->other;
2955 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2956 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2957 }
2958
2959 EV_FREQUENT_CHECK;
2960
2961 ev_set_priority (&w->io, ev_priority (w));
2962 ev_io_start (EV_A_ &w->io);
2963
2964 ev_prepare_init (&w->prepare, embed_prepare_cb);
2965 ev_set_priority (&w->prepare, EV_MINPRI);
2966 ev_prepare_start (EV_A_ &w->prepare);
2967
2968 ev_fork_init (&w->fork, embed_fork_cb);
2969 ev_fork_start (EV_A_ &w->fork);
2970
2971 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2972
928 ev_start ((W)w, 1); 2973 ev_start (EV_A_ (W)w, 1);
929 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
930}
931 2974
932void evchild_stop (struct ev_child *w) 2975 EV_FREQUENT_CHECK;
2976}
2977
2978void
2979ev_embed_stop (EV_P_ ev_embed *w)
933{ 2980{
934 ev_clear ((W)w); 2981 clear_pending (EV_A_ (W)w);
935 if (ev_is_active (w)) 2982 if (expect_false (!ev_is_active (w)))
936 return; 2983 return;
937 2984
938 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2985 EV_FREQUENT_CHECK;
2986
2987 ev_io_stop (EV_A_ &w->io);
2988 ev_prepare_stop (EV_A_ &w->prepare);
2989 ev_fork_stop (EV_A_ &w->fork);
2990
2991 EV_FREQUENT_CHECK;
2992}
2993#endif
2994
2995#if EV_FORK_ENABLE
2996void
2997ev_fork_start (EV_P_ ev_fork *w)
2998{
2999 if (expect_false (ev_is_active (w)))
3000 return;
3001
3002 EV_FREQUENT_CHECK;
3003
3004 ev_start (EV_A_ (W)w, ++forkcnt);
3005 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3006 forks [forkcnt - 1] = w;
3007
3008 EV_FREQUENT_CHECK;
3009}
3010
3011void
3012ev_fork_stop (EV_P_ ev_fork *w)
3013{
3014 clear_pending (EV_A_ (W)w);
3015 if (expect_false (!ev_is_active (w)))
3016 return;
3017
3018 EV_FREQUENT_CHECK;
3019
3020 {
3021 int active = ev_active (w);
3022
3023 forks [active - 1] = forks [--forkcnt];
3024 ev_active (forks [active - 1]) = active;
3025 }
3026
939 ev_stop ((W)w); 3027 ev_stop (EV_A_ (W)w);
3028
3029 EV_FREQUENT_CHECK;
940} 3030}
3031#endif
3032
3033#if EV_ASYNC_ENABLE
3034void
3035ev_async_start (EV_P_ ev_async *w)
3036{
3037 if (expect_false (ev_is_active (w)))
3038 return;
3039
3040 evpipe_init (EV_A);
3041
3042 EV_FREQUENT_CHECK;
3043
3044 ev_start (EV_A_ (W)w, ++asynccnt);
3045 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3046 asyncs [asynccnt - 1] = w;
3047
3048 EV_FREQUENT_CHECK;
3049}
3050
3051void
3052ev_async_stop (EV_P_ ev_async *w)
3053{
3054 clear_pending (EV_A_ (W)w);
3055 if (expect_false (!ev_is_active (w)))
3056 return;
3057
3058 EV_FREQUENT_CHECK;
3059
3060 {
3061 int active = ev_active (w);
3062
3063 asyncs [active - 1] = asyncs [--asynccnt];
3064 ev_active (asyncs [active - 1]) = active;
3065 }
3066
3067 ev_stop (EV_A_ (W)w);
3068
3069 EV_FREQUENT_CHECK;
3070}
3071
3072void
3073ev_async_send (EV_P_ ev_async *w)
3074{
3075 w->sent = 1;
3076 evpipe_write (EV_A_ &gotasync);
3077}
3078#endif
941 3079
942/*****************************************************************************/ 3080/*****************************************************************************/
943 3081
944struct ev_once 3082struct ev_once
945{ 3083{
946 struct ev_io io; 3084 ev_io io;
947 struct ev_timer to; 3085 ev_timer to;
948 void (*cb)(int revents, void *arg); 3086 void (*cb)(int revents, void *arg);
949 void *arg; 3087 void *arg;
950}; 3088};
951 3089
952static void 3090static void
953once_cb (struct ev_once *once, int revents) 3091once_cb (EV_P_ struct ev_once *once, int revents)
954{ 3092{
955 void (*cb)(int revents, void *arg) = once->cb; 3093 void (*cb)(int revents, void *arg) = once->cb;
956 void *arg = once->arg; 3094 void *arg = once->arg;
957 3095
958 evio_stop (&once->io); 3096 ev_io_stop (EV_A_ &once->io);
959 evtimer_stop (&once->to); 3097 ev_timer_stop (EV_A_ &once->to);
960 free (once); 3098 ev_free (once);
961 3099
962 cb (revents, arg); 3100 cb (revents, arg);
963} 3101}
964 3102
965static void 3103static void
966once_cb_io (struct ev_io *w, int revents) 3104once_cb_io (EV_P_ ev_io *w, int revents)
967{ 3105{
968 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3106 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3107
3108 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
969} 3109}
970 3110
971static void 3111static void
972once_cb_to (struct ev_timer *w, int revents) 3112once_cb_to (EV_P_ ev_timer *w, int revents)
973{ 3113{
974 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3114 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
975}
976 3115
3116 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3117}
3118
977void 3119void
978ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3120ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
979{ 3121{
980 struct ev_once *once = malloc (sizeof (struct ev_once)); 3122 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
981 3123
982 if (!once) 3124 if (expect_false (!once))
983 cb (EV_ERROR, arg); 3125 {
984 else 3126 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
3127 return;
985 { 3128 }
3129
986 once->cb = cb; 3130 once->cb = cb;
987 once->arg = arg; 3131 once->arg = arg;
988 3132
989 evw_init (&once->io, once_cb_io); 3133 ev_init (&once->io, once_cb_io);
990
991 if (fd >= 0) 3134 if (fd >= 0)
3135 {
3136 ev_io_set (&once->io, fd, events);
3137 ev_io_start (EV_A_ &once->io);
3138 }
3139
3140 ev_init (&once->to, once_cb_to);
3141 if (timeout >= 0.)
3142 {
3143 ev_timer_set (&once->to, timeout, 0.);
3144 ev_timer_start (EV_A_ &once->to);
3145 }
3146}
3147
3148/*****************************************************************************/
3149
3150#if 0
3151void
3152ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3153{
3154 int i, j;
3155 ev_watcher_list *wl, *wn;
3156
3157 if (types & (EV_IO | EV_EMBED))
3158 for (i = 0; i < anfdmax; ++i)
3159 for (wl = anfds [i].head; wl; )
992 { 3160 {
993 evio_set (&once->io, fd, events); 3161 wn = wl->next;
994 evio_start (&once->io); 3162
3163#if EV_EMBED_ENABLE
3164 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3165 {
3166 if (types & EV_EMBED)
3167 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3168 }
3169 else
3170#endif
3171#if EV_USE_INOTIFY
3172 if (ev_cb ((ev_io *)wl) == infy_cb)
3173 ;
3174 else
3175#endif
3176 if ((ev_io *)wl != &pipeev)
3177 if (types & EV_IO)
3178 cb (EV_A_ EV_IO, wl);
3179
3180 wl = wn;
995 } 3181 }
996 3182
997 evw_init (&once->to, once_cb_to); 3183 if (types & (EV_TIMER | EV_STAT))
998 3184 for (i = timercnt + HEAP0; i-- > HEAP0; )
999 if (timeout >= 0.) 3185#if EV_STAT_ENABLE
3186 /*TODO: timer is not always active*/
3187 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1000 { 3188 {
1001 evtimer_set (&once->to, timeout, 0.); 3189 if (types & EV_STAT)
1002 evtimer_start (&once->to); 3190 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1003 } 3191 }
1004 } 3192 else
1005} 3193#endif
3194 if (types & EV_TIMER)
3195 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1006 3196
1007/*****************************************************************************/ 3197#if EV_PERIODIC_ENABLE
3198 if (types & EV_PERIODIC)
3199 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3200 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3201#endif
1008 3202
1009#if 0 3203#if EV_IDLE_ENABLE
3204 if (types & EV_IDLE)
3205 for (j = NUMPRI; i--; )
3206 for (i = idlecnt [j]; i--; )
3207 cb (EV_A_ EV_IDLE, idles [j][i]);
3208#endif
1010 3209
1011struct ev_io wio; 3210#if EV_FORK_ENABLE
3211 if (types & EV_FORK)
3212 for (i = forkcnt; i--; )
3213 if (ev_cb (forks [i]) != embed_fork_cb)
3214 cb (EV_A_ EV_FORK, forks [i]);
3215#endif
1012 3216
1013static void 3217#if EV_ASYNC_ENABLE
1014sin_cb (struct ev_io *w, int revents) 3218 if (types & EV_ASYNC)
1015{ 3219 for (i = asynccnt; i--; )
1016 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 3220 cb (EV_A_ EV_ASYNC, asyncs [i]);
1017} 3221#endif
1018 3222
1019static void 3223 if (types & EV_PREPARE)
1020ocb (struct ev_timer *w, int revents) 3224 for (i = preparecnt; i--; )
1021{ 3225#if EV_EMBED_ENABLE
1022 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 3226 if (ev_cb (prepares [i]) != embed_prepare_cb)
1023 evtimer_stop (w); 3227#endif
1024 evtimer_start (w); 3228 cb (EV_A_ EV_PREPARE, prepares [i]);
1025}
1026 3229
1027static void 3230 if (types & EV_CHECK)
1028scb (struct ev_signal *w, int revents) 3231 for (i = checkcnt; i--; )
1029{ 3232 cb (EV_A_ EV_CHECK, checks [i]);
1030 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1031 evio_stop (&wio);
1032 evio_start (&wio);
1033}
1034 3233
1035static void 3234 if (types & EV_SIGNAL)
1036gcb (struct ev_signal *w, int revents)
1037{
1038 fprintf (stderr, "generic %x\n", revents);
1039
1040}
1041
1042int main (void)
1043{
1044 ev_init (0);
1045
1046 evio_init (&wio, sin_cb, 0, EV_READ);
1047 evio_start (&wio);
1048
1049 struct ev_timer t[10000];
1050
1051#if 0
1052 int i;
1053 for (i = 0; i < 10000; ++i) 3235 for (i = 0; i < signalmax; ++i)
1054 { 3236 for (wl = signals [i].head; wl; )
1055 struct ev_timer *w = t + i; 3237 {
1056 evw_init (w, ocb, i); 3238 wn = wl->next;
1057 evtimer_init_abs (w, ocb, drand48 (), 0.99775533); 3239 cb (EV_A_ EV_SIGNAL, wl);
1058 evtimer_start (w); 3240 wl = wn;
1059 if (drand48 () < 0.5) 3241 }
1060 evtimer_stop (w);
1061 }
1062#endif
1063 3242
1064 struct ev_timer t1; 3243 if (types & EV_CHILD)
1065 evtimer_init (&t1, ocb, 5, 10); 3244 for (i = EV_PID_HASHSIZE; i--; )
1066 evtimer_start (&t1); 3245 for (wl = childs [i]; wl; )
1067 3246 {
1068 struct ev_signal sig; 3247 wn = wl->next;
1069 evsignal_init (&sig, scb, SIGQUIT); 3248 cb (EV_A_ EV_CHILD, wl);
1070 evsignal_start (&sig); 3249 wl = wn;
1071 3250 }
1072 struct ev_check cw; 3251/* EV_STAT 0x00001000 /* stat data changed */
1073 evcheck_init (&cw, gcb); 3252/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
1074 evcheck_start (&cw);
1075
1076 struct ev_idle iw;
1077 evidle_init (&iw, gcb);
1078 evidle_start (&iw);
1079
1080 ev_loop (0);
1081
1082 return 0;
1083} 3253}
1084
1085#endif 3254#endif
1086 3255
3256#if EV_MULTIPLICITY
3257 #include "ev_wrap.h"
3258#endif
1087 3259
3260#ifdef __cplusplus
3261}
3262#endif
1088 3263
1089

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