ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libev/ev.c
(Generate patch)

Comparing libev/ev.c (file contents):
Revision 1.20 by root, Wed Oct 31 18:28:00 2007 UTC vs.
Revision 1.263 by root, Wed Oct 1 18:50:03 2008 UTC

1/* 1/*
2 * libev event processing core, watcher management
3 *
2 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
3 * All rights reserved. 5 * All rights reserved.
4 * 6 *
5 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
6 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
7 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
8 * 27 *
9 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
10 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
11 * 30 * in which case the provisions of the GPL are applicable instead of
12 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
13 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
14 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
15 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
16 * 35 * and other provisions required by the GPL. If you do not delete the
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */ 38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC
54# define EV_USE_MONOTONIC 1
55# endif
56# ifndef EV_USE_REALTIME
57# define EV_USE_REALTIME 1
58# endif
59# else
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0
62# endif
63# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0
65# endif
66# endif
67
68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
73# endif
74# endif
75
76# ifndef EV_USE_SELECT
77# if HAVE_SELECT && HAVE_SYS_SELECT_H
78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif
82# endif
83
84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
86# define EV_USE_POLL 1
87# else
88# define EV_USE_POLL 0
89# endif
90# endif
91
92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94# define EV_USE_EPOLL 1
95# else
96# define EV_USE_EPOLL 0
97# endif
98# endif
99
100# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif
106# endif
107
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1
111# else
112# define EV_USE_PORT 0
113# endif
114# endif
115
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1
119# else
120# define EV_USE_INOTIFY 0
121# endif
122# endif
123
124# ifndef EV_USE_EVENTFD
125# if HAVE_EVENTFD
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif
130# endif
131
132#endif
29 133
30#include <math.h> 134#include <math.h>
31#include <stdlib.h> 135#include <stdlib.h>
32#include <unistd.h>
33#include <fcntl.h> 136#include <fcntl.h>
34#include <signal.h>
35#include <stddef.h> 137#include <stddef.h>
36 138
37#include <stdio.h> 139#include <stdio.h>
38 140
39#include <assert.h> 141#include <assert.h>
40#include <errno.h> 142#include <errno.h>
41#include <sys/time.h> 143#include <sys/types.h>
42#include <time.h> 144#include <time.h>
43 145
44#ifndef HAVE_MONOTONIC 146#include <signal.h>
45# ifdef CLOCK_MONOTONIC 147
46# define HAVE_MONOTONIC 1 148#ifdef EV_H
149# include EV_H
150#else
151# include "ev.h"
152#endif
153
154#ifndef _WIN32
155# include <sys/time.h>
156# include <sys/wait.h>
157# include <unistd.h>
158#else
159# include <io.h>
160# define WIN32_LEAN_AND_MEAN
161# include <windows.h>
162# ifndef EV_SELECT_IS_WINSOCKET
163# define EV_SELECT_IS_WINSOCKET 1
47# endif 164# endif
48#endif 165#endif
49 166
50#ifndef HAVE_SELECT 167/* this block tries to deduce configuration from header-defined symbols and defaults */
51# define HAVE_SELECT 1 168
169#ifndef EV_USE_MONOTONIC
170# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
171# define EV_USE_MONOTONIC 1
172# else
173# define EV_USE_MONOTONIC 0
52#endif 174# endif
175#endif
53 176
54#ifndef HAVE_EPOLL 177#ifndef EV_USE_REALTIME
55# define HAVE_EPOLL 0 178# define EV_USE_REALTIME 0
179#endif
180
181#ifndef EV_USE_NANOSLEEP
182# if _POSIX_C_SOURCE >= 199309L
183# define EV_USE_NANOSLEEP 1
184# else
185# define EV_USE_NANOSLEEP 0
56#endif 186# endif
187#endif
57 188
58#ifndef HAVE_REALTIME 189#ifndef EV_USE_SELECT
59# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ 190# define EV_USE_SELECT 1
191#endif
192
193#ifndef EV_USE_POLL
194# ifdef _WIN32
195# define EV_USE_POLL 0
196# else
197# define EV_USE_POLL 1
60#endif 198# endif
199#endif
200
201#ifndef EV_USE_EPOLL
202# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
203# define EV_USE_EPOLL 1
204# else
205# define EV_USE_EPOLL 0
206# endif
207#endif
208
209#ifndef EV_USE_KQUEUE
210# define EV_USE_KQUEUE 0
211#endif
212
213#ifndef EV_USE_PORT
214# define EV_USE_PORT 0
215#endif
216
217#ifndef EV_USE_INOTIFY
218# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
219# define EV_USE_INOTIFY 1
220# else
221# define EV_USE_INOTIFY 0
222# endif
223#endif
224
225#ifndef EV_PID_HASHSIZE
226# if EV_MINIMAL
227# define EV_PID_HASHSIZE 1
228# else
229# define EV_PID_HASHSIZE 16
230# endif
231#endif
232
233#ifndef EV_INOTIFY_HASHSIZE
234# if EV_MINIMAL
235# define EV_INOTIFY_HASHSIZE 1
236# else
237# define EV_INOTIFY_HASHSIZE 16
238# endif
239#endif
240
241#ifndef EV_USE_EVENTFD
242# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
243# define EV_USE_EVENTFD 1
244# else
245# define EV_USE_EVENTFD 0
246# endif
247#endif
248
249#if 0 /* debugging */
250# define EV_VERIFY 3
251# define EV_USE_4HEAP 1
252# define EV_HEAP_CACHE_AT 1
253#endif
254
255#ifndef EV_VERIFY
256# define EV_VERIFY !EV_MINIMAL
257#endif
258
259#ifndef EV_USE_4HEAP
260# define EV_USE_4HEAP !EV_MINIMAL
261#endif
262
263#ifndef EV_HEAP_CACHE_AT
264# define EV_HEAP_CACHE_AT !EV_MINIMAL
265#endif
266
267/* this block fixes any misconfiguration where we know we run into trouble otherwise */
268
269#ifndef CLOCK_MONOTONIC
270# undef EV_USE_MONOTONIC
271# define EV_USE_MONOTONIC 0
272#endif
273
274#ifndef CLOCK_REALTIME
275# undef EV_USE_REALTIME
276# define EV_USE_REALTIME 0
277#endif
278
279#if !EV_STAT_ENABLE
280# undef EV_USE_INOTIFY
281# define EV_USE_INOTIFY 0
282#endif
283
284#if !EV_USE_NANOSLEEP
285# ifndef _WIN32
286# include <sys/select.h>
287# endif
288#endif
289
290#if EV_USE_INOTIFY
291# include <sys/inotify.h>
292/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
293# ifndef IN_DONT_FOLLOW
294# undef EV_USE_INOTIFY
295# define EV_USE_INOTIFY 0
296# endif
297#endif
298
299#if EV_SELECT_IS_WINSOCKET
300# include <winsock.h>
301#endif
302
303#if EV_USE_EVENTFD
304/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
305# include <stdint.h>
306# ifdef __cplusplus
307extern "C" {
308# endif
309int eventfd (unsigned int initval, int flags);
310# ifdef __cplusplus
311}
312# endif
313#endif
314
315/**/
316
317#if EV_VERIFY >= 3
318# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
319#else
320# define EV_FREQUENT_CHECK do { } while (0)
321#endif
322
323/*
324 * This is used to avoid floating point rounding problems.
325 * It is added to ev_rt_now when scheduling periodics
326 * to ensure progress, time-wise, even when rounding
327 * errors are against us.
328 * This value is good at least till the year 4000.
329 * Better solutions welcome.
330 */
331#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
61 332
62#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 333#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
63#define MAX_BLOCKTIME 60. 334#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
335/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
64 336
65#include "ev.h" 337#if __GNUC__ >= 4
338# define expect(expr,value) __builtin_expect ((expr),(value))
339# define noinline __attribute__ ((noinline))
340#else
341# define expect(expr,value) (expr)
342# define noinline
343# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
344# define inline
345# endif
346#endif
66 347
348#define expect_false(expr) expect ((expr) != 0, 0)
349#define expect_true(expr) expect ((expr) != 0, 1)
350#define inline_size static inline
351
352#if EV_MINIMAL
353# define inline_speed static noinline
354#else
355# define inline_speed static inline
356#endif
357
358#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
359#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
360
361#define EMPTY /* required for microsofts broken pseudo-c compiler */
362#define EMPTY2(a,b) /* used to suppress some warnings */
363
67typedef struct ev_watcher *W; 364typedef ev_watcher *W;
68typedef struct ev_watcher_list *WL; 365typedef ev_watcher_list *WL;
69typedef struct ev_watcher_time *WT; 366typedef ev_watcher_time *WT;
70 367
71static ev_tstamp now, diff; /* monotonic clock */ 368#define ev_active(w) ((W)(w))->active
369#define ev_at(w) ((WT)(w))->at
370
371#if EV_USE_MONOTONIC
372/* sig_atomic_t is used to avoid per-thread variables or locking but still */
373/* giving it a reasonably high chance of working on typical architetcures */
374static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
375#endif
376
377#ifdef _WIN32
378# include "ev_win32.c"
379#endif
380
381/*****************************************************************************/
382
383static void (*syserr_cb)(const char *msg);
384
385void
386ev_set_syserr_cb (void (*cb)(const char *msg))
387{
388 syserr_cb = cb;
389}
390
391static void noinline
392syserr (const char *msg)
393{
394 if (!msg)
395 msg = "(libev) system error";
396
397 if (syserr_cb)
398 syserr_cb (msg);
399 else
400 {
401 perror (msg);
402 abort ();
403 }
404}
405
406static void *
407ev_realloc_emul (void *ptr, long size)
408{
409 /* some systems, notably openbsd and darwin, fail to properly
410 * implement realloc (x, 0) (as required by both ansi c-98 and
411 * the single unix specification, so work around them here.
412 */
413
414 if (size)
415 return realloc (ptr, size);
416
417 free (ptr);
418 return 0;
419}
420
421static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
422
423void
424ev_set_allocator (void *(*cb)(void *ptr, long size))
425{
426 alloc = cb;
427}
428
429inline_speed void *
430ev_realloc (void *ptr, long size)
431{
432 ptr = alloc (ptr, size);
433
434 if (!ptr && size)
435 {
436 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
437 abort ();
438 }
439
440 return ptr;
441}
442
443#define ev_malloc(size) ev_realloc (0, (size))
444#define ev_free(ptr) ev_realloc ((ptr), 0)
445
446/*****************************************************************************/
447
448typedef struct
449{
450 WL head;
451 unsigned char events;
452 unsigned char reify;
453#if EV_SELECT_IS_WINSOCKET
454 SOCKET handle;
455#endif
456} ANFD;
457
458typedef struct
459{
460 W w;
461 int events;
462} ANPENDING;
463
464#if EV_USE_INOTIFY
465/* hash table entry per inotify-id */
466typedef struct
467{
468 WL head;
469} ANFS;
470#endif
471
472/* Heap Entry */
473#if EV_HEAP_CACHE_AT
474 typedef struct {
475 ev_tstamp at;
476 WT w;
477 } ANHE;
478
479 #define ANHE_w(he) (he).w /* access watcher, read-write */
480 #define ANHE_at(he) (he).at /* access cached at, read-only */
481 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
482#else
483 typedef WT ANHE;
484
485 #define ANHE_w(he) (he)
486 #define ANHE_at(he) (he)->at
487 #define ANHE_at_cache(he)
488#endif
489
490#if EV_MULTIPLICITY
491
492 struct ev_loop
493 {
494 ev_tstamp ev_rt_now;
495 #define ev_rt_now ((loop)->ev_rt_now)
496 #define VAR(name,decl) decl;
497 #include "ev_vars.h"
498 #undef VAR
499 };
500 #include "ev_wrap.h"
501
502 static struct ev_loop default_loop_struct;
503 struct ev_loop *ev_default_loop_ptr;
504
505#else
506
72ev_tstamp ev_now; 507 ev_tstamp ev_rt_now;
73int ev_method; 508 #define VAR(name,decl) static decl;
509 #include "ev_vars.h"
510 #undef VAR
74 511
75static int have_monotonic; /* runtime */ 512 static int ev_default_loop_ptr;
76 513
77static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 514#endif
78static void (*method_modify)(int fd, int oev, int nev);
79static void (*method_poll)(ev_tstamp timeout);
80 515
81/*****************************************************************************/ 516/*****************************************************************************/
82 517
83ev_tstamp 518ev_tstamp
84ev_time (void) 519ev_time (void)
85{ 520{
86#if HAVE_REALTIME 521#if EV_USE_REALTIME
87 struct timespec ts; 522 struct timespec ts;
88 clock_gettime (CLOCK_REALTIME, &ts); 523 clock_gettime (CLOCK_REALTIME, &ts);
89 return ts.tv_sec + ts.tv_nsec * 1e-9; 524 return ts.tv_sec + ts.tv_nsec * 1e-9;
90#else 525#else
91 struct timeval tv; 526 struct timeval tv;
92 gettimeofday (&tv, 0); 527 gettimeofday (&tv, 0);
93 return tv.tv_sec + tv.tv_usec * 1e-6; 528 return tv.tv_sec + tv.tv_usec * 1e-6;
94#endif 529#endif
95} 530}
96 531
97static ev_tstamp 532ev_tstamp inline_size
98get_clock (void) 533get_clock (void)
99{ 534{
100#if HAVE_MONOTONIC 535#if EV_USE_MONOTONIC
101 if (have_monotonic) 536 if (expect_true (have_monotonic))
102 { 537 {
103 struct timespec ts; 538 struct timespec ts;
104 clock_gettime (CLOCK_MONOTONIC, &ts); 539 clock_gettime (CLOCK_MONOTONIC, &ts);
105 return ts.tv_sec + ts.tv_nsec * 1e-9; 540 return ts.tv_sec + ts.tv_nsec * 1e-9;
106 } 541 }
107#endif 542#endif
108 543
109 return ev_time (); 544 return ev_time ();
110} 545}
111 546
112#define array_needsize(base,cur,cnt,init) \ 547#if EV_MULTIPLICITY
113 if ((cnt) > cur) \ 548ev_tstamp
114 { \ 549ev_now (EV_P)
115 int newcnt = cur ? cur << 1 : 16; \ 550{
116 base = realloc (base, sizeof (*base) * (newcnt)); \ 551 return ev_rt_now;
117 init (base + cur, newcnt - cur); \ 552}
118 cur = newcnt; \ 553#endif
554
555void
556ev_sleep (ev_tstamp delay)
557{
558 if (delay > 0.)
119 } 559 {
560#if EV_USE_NANOSLEEP
561 struct timespec ts;
562
563 ts.tv_sec = (time_t)delay;
564 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
565
566 nanosleep (&ts, 0);
567#elif defined(_WIN32)
568 Sleep ((unsigned long)(delay * 1e3));
569#else
570 struct timeval tv;
571
572 tv.tv_sec = (time_t)delay;
573 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
574
575 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
576 /* somehting nto guaranteed by newer posix versions, but guaranteed */
577 /* by older ones */
578 select (0, 0, 0, 0, &tv);
579#endif
580 }
581}
120 582
121/*****************************************************************************/ 583/*****************************************************************************/
122 584
585#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
586
587int inline_size
588array_nextsize (int elem, int cur, int cnt)
589{
590 int ncur = cur + 1;
591
592 do
593 ncur <<= 1;
594 while (cnt > ncur);
595
596 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
597 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
598 {
599 ncur *= elem;
600 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
601 ncur = ncur - sizeof (void *) * 4;
602 ncur /= elem;
603 }
604
605 return ncur;
606}
607
608static noinline void *
609array_realloc (int elem, void *base, int *cur, int cnt)
610{
611 *cur = array_nextsize (elem, *cur, cnt);
612 return ev_realloc (base, elem * *cur);
613}
614
615#define array_needsize(type,base,cur,cnt,init) \
616 if (expect_false ((cnt) > (cur))) \
617 { \
618 int ocur_ = (cur); \
619 (base) = (type *)array_realloc \
620 (sizeof (type), (base), &(cur), (cnt)); \
621 init ((base) + (ocur_), (cur) - ocur_); \
622 }
623
624#if 0
625#define array_slim(type,stem) \
626 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
627 { \
628 stem ## max = array_roundsize (stem ## cnt >> 1); \
629 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
630 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
631 }
632#endif
633
634#define array_free(stem, idx) \
635 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
636
637/*****************************************************************************/
638
639void noinline
640ev_feed_event (EV_P_ void *w, int revents)
641{
642 W w_ = (W)w;
643 int pri = ABSPRI (w_);
644
645 if (expect_false (w_->pending))
646 pendings [pri][w_->pending - 1].events |= revents;
647 else
648 {
649 w_->pending = ++pendingcnt [pri];
650 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
651 pendings [pri][w_->pending - 1].w = w_;
652 pendings [pri][w_->pending - 1].events = revents;
653 }
654}
655
656void inline_speed
657queue_events (EV_P_ W *events, int eventcnt, int type)
658{
659 int i;
660
661 for (i = 0; i < eventcnt; ++i)
662 ev_feed_event (EV_A_ events [i], type);
663}
664
665/*****************************************************************************/
666
667void inline_size
668anfds_init (ANFD *base, int count)
669{
670 while (count--)
671 {
672 base->head = 0;
673 base->events = EV_NONE;
674 base->reify = 0;
675
676 ++base;
677 }
678}
679
680void inline_speed
681fd_event (EV_P_ int fd, int revents)
682{
683 ANFD *anfd = anfds + fd;
684 ev_io *w;
685
686 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
687 {
688 int ev = w->events & revents;
689
690 if (ev)
691 ev_feed_event (EV_A_ (W)w, ev);
692 }
693}
694
695void
696ev_feed_fd_event (EV_P_ int fd, int revents)
697{
698 if (fd >= 0 && fd < anfdmax)
699 fd_event (EV_A_ fd, revents);
700}
701
702void inline_size
703fd_reify (EV_P)
704{
705 int i;
706
707 for (i = 0; i < fdchangecnt; ++i)
708 {
709 int fd = fdchanges [i];
710 ANFD *anfd = anfds + fd;
711 ev_io *w;
712
713 unsigned char events = 0;
714
715 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
716 events |= (unsigned char)w->events;
717
718#if EV_SELECT_IS_WINSOCKET
719 if (events)
720 {
721 unsigned long arg;
722 #ifdef EV_FD_TO_WIN32_HANDLE
723 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
724 #else
725 anfd->handle = _get_osfhandle (fd);
726 #endif
727 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
728 }
729#endif
730
731 {
732 unsigned char o_events = anfd->events;
733 unsigned char o_reify = anfd->reify;
734
735 anfd->reify = 0;
736 anfd->events = events;
737
738 if (o_events != events || o_reify & EV_IOFDSET)
739 backend_modify (EV_A_ fd, o_events, events);
740 }
741 }
742
743 fdchangecnt = 0;
744}
745
746void inline_size
747fd_change (EV_P_ int fd, int flags)
748{
749 unsigned char reify = anfds [fd].reify;
750 anfds [fd].reify |= flags;
751
752 if (expect_true (!reify))
753 {
754 ++fdchangecnt;
755 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
756 fdchanges [fdchangecnt - 1] = fd;
757 }
758}
759
760void inline_speed
761fd_kill (EV_P_ int fd)
762{
763 ev_io *w;
764
765 while ((w = (ev_io *)anfds [fd].head))
766 {
767 ev_io_stop (EV_A_ w);
768 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
769 }
770}
771
772int inline_size
773fd_valid (int fd)
774{
775#ifdef _WIN32
776 return _get_osfhandle (fd) != -1;
777#else
778 return fcntl (fd, F_GETFD) != -1;
779#endif
780}
781
782/* called on EBADF to verify fds */
783static void noinline
784fd_ebadf (EV_P)
785{
786 int fd;
787
788 for (fd = 0; fd < anfdmax; ++fd)
789 if (anfds [fd].events)
790 if (!fd_valid (fd) && errno == EBADF)
791 fd_kill (EV_A_ fd);
792}
793
794/* called on ENOMEM in select/poll to kill some fds and retry */
795static void noinline
796fd_enomem (EV_P)
797{
798 int fd;
799
800 for (fd = anfdmax; fd--; )
801 if (anfds [fd].events)
802 {
803 fd_kill (EV_A_ fd);
804 return;
805 }
806}
807
808/* usually called after fork if backend needs to re-arm all fds from scratch */
809static void noinline
810fd_rearm_all (EV_P)
811{
812 int fd;
813
814 for (fd = 0; fd < anfdmax; ++fd)
815 if (anfds [fd].events)
816 {
817 anfds [fd].events = 0;
818 fd_change (EV_A_ fd, EV_IOFDSET | 1);
819 }
820}
821
822/*****************************************************************************/
823
824/*
825 * the heap functions want a real array index. array index 0 uis guaranteed to not
826 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
827 * the branching factor of the d-tree.
828 */
829
830/*
831 * at the moment we allow libev the luxury of two heaps,
832 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
833 * which is more cache-efficient.
834 * the difference is about 5% with 50000+ watchers.
835 */
836#if EV_USE_4HEAP
837
838#define DHEAP 4
839#define HEAP0 (DHEAP - 1) /* index of first element in heap */
840#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
841#define UPHEAP_DONE(p,k) ((p) == (k))
842
843/* away from the root */
844void inline_speed
845downheap (ANHE *heap, int N, int k)
846{
847 ANHE he = heap [k];
848 ANHE *E = heap + N + HEAP0;
849
850 for (;;)
851 {
852 ev_tstamp minat;
853 ANHE *minpos;
854 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
855
856 /* find minimum child */
857 if (expect_true (pos + DHEAP - 1 < E))
858 {
859 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
860 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
861 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
862 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
863 }
864 else if (pos < E)
865 {
866 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
867 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
868 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
869 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
870 }
871 else
872 break;
873
874 if (ANHE_at (he) <= minat)
875 break;
876
877 heap [k] = *minpos;
878 ev_active (ANHE_w (*minpos)) = k;
879
880 k = minpos - heap;
881 }
882
883 heap [k] = he;
884 ev_active (ANHE_w (he)) = k;
885}
886
887#else /* 4HEAP */
888
889#define HEAP0 1
890#define HPARENT(k) ((k) >> 1)
891#define UPHEAP_DONE(p,k) (!(p))
892
893/* away from the root */
894void inline_speed
895downheap (ANHE *heap, int N, int k)
896{
897 ANHE he = heap [k];
898
899 for (;;)
900 {
901 int c = k << 1;
902
903 if (c > N + HEAP0 - 1)
904 break;
905
906 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
907 ? 1 : 0;
908
909 if (ANHE_at (he) <= ANHE_at (heap [c]))
910 break;
911
912 heap [k] = heap [c];
913 ev_active (ANHE_w (heap [k])) = k;
914
915 k = c;
916 }
917
918 heap [k] = he;
919 ev_active (ANHE_w (he)) = k;
920}
921#endif
922
923/* towards the root */
924void inline_speed
925upheap (ANHE *heap, int k)
926{
927 ANHE he = heap [k];
928
929 for (;;)
930 {
931 int p = HPARENT (k);
932
933 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
934 break;
935
936 heap [k] = heap [p];
937 ev_active (ANHE_w (heap [k])) = k;
938 k = p;
939 }
940
941 heap [k] = he;
942 ev_active (ANHE_w (he)) = k;
943}
944
945void inline_size
946adjustheap (ANHE *heap, int N, int k)
947{
948 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
949 upheap (heap, k);
950 else
951 downheap (heap, N, k);
952}
953
954/* rebuild the heap: this function is used only once and executed rarely */
955void inline_size
956reheap (ANHE *heap, int N)
957{
958 int i;
959
960 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
961 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
962 for (i = 0; i < N; ++i)
963 upheap (heap, i + HEAP0);
964}
965
966/*****************************************************************************/
967
123typedef struct 968typedef struct
124{ 969{
125 struct ev_io *head; 970 WL head;
126 unsigned char wev, rev; /* want, received event set */ 971 EV_ATOMIC_T gotsig;
127} ANFD;
128
129static ANFD *anfds;
130static int anfdmax;
131
132static int *fdchanges;
133static int fdchangemax, fdchangecnt;
134
135static void
136anfds_init (ANFD *base, int count)
137{
138 while (count--)
139 {
140 base->head = 0;
141 base->wev = base->rev = EV_NONE;
142 ++base;
143 }
144}
145
146typedef struct
147{
148 W w;
149 int events;
150} ANPENDING;
151
152static ANPENDING *pendings;
153static int pendingmax, pendingcnt;
154
155static void
156event (W w, int events)
157{
158 if (w->active)
159 {
160 w->pending = ++pendingcnt;
161 array_needsize (pendings, pendingmax, pendingcnt, );
162 pendings [pendingcnt - 1].w = w;
163 pendings [pendingcnt - 1].events = events;
164 }
165}
166
167static void
168fd_event (int fd, int events)
169{
170 ANFD *anfd = anfds + fd;
171 struct ev_io *w;
172
173 for (w = anfd->head; w; w = w->next)
174 {
175 int ev = w->events & events;
176
177 if (ev)
178 event ((W)w, ev);
179 }
180}
181
182static void
183queue_events (W *events, int eventcnt, int type)
184{
185 int i;
186
187 for (i = 0; i < eventcnt; ++i)
188 event (events [i], type);
189}
190
191/* called on EBADF to verify fds */
192static void
193fd_recheck ()
194{
195 int fd;
196
197 for (fd = 0; fd < anfdmax; ++fd)
198 if (anfds [fd].wev)
199 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
200 while (anfds [fd].head)
201 evio_stop (anfds [fd].head);
202}
203
204/*****************************************************************************/
205
206static struct ev_timer **timers;
207static int timermax, timercnt;
208
209static struct ev_periodic **periodics;
210static int periodicmax, periodiccnt;
211
212static void
213upheap (WT *timers, int k)
214{
215 WT w = timers [k];
216
217 while (k && timers [k >> 1]->at > w->at)
218 {
219 timers [k] = timers [k >> 1];
220 timers [k]->active = k + 1;
221 k >>= 1;
222 }
223
224 timers [k] = w;
225 timers [k]->active = k + 1;
226
227}
228
229static void
230downheap (WT *timers, int N, int k)
231{
232 WT w = timers [k];
233
234 while (k < (N >> 1))
235 {
236 int j = k << 1;
237
238 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
239 ++j;
240
241 if (w->at <= timers [j]->at)
242 break;
243
244 timers [k] = timers [j];
245 timers [k]->active = k + 1;
246 k = j;
247 }
248
249 timers [k] = w;
250 timers [k]->active = k + 1;
251}
252
253/*****************************************************************************/
254
255typedef struct
256{
257 struct ev_signal *head;
258 sig_atomic_t gotsig;
259} ANSIG; 972} ANSIG;
260 973
261static ANSIG *signals; 974static ANSIG *signals;
262static int signalmax; 975static int signalmax;
263 976
264static int sigpipe [2]; 977static EV_ATOMIC_T gotsig;
265static sig_atomic_t gotsig;
266static struct ev_io sigev;
267 978
268static void 979void inline_size
269signals_init (ANSIG *base, int count) 980signals_init (ANSIG *base, int count)
270{ 981{
271 while (count--) 982 while (count--)
272 { 983 {
273 base->head = 0; 984 base->head = 0;
274 base->gotsig = 0; 985 base->gotsig = 0;
986
275 ++base; 987 ++base;
276 } 988 }
277} 989}
278 990
991/*****************************************************************************/
992
993void inline_speed
994fd_intern (int fd)
995{
996#ifdef _WIN32
997 unsigned long arg = 1;
998 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
999#else
1000 fcntl (fd, F_SETFD, FD_CLOEXEC);
1001 fcntl (fd, F_SETFL, O_NONBLOCK);
1002#endif
1003}
1004
1005static void noinline
1006evpipe_init (EV_P)
1007{
1008 if (!ev_is_active (&pipeev))
1009 {
1010#if EV_USE_EVENTFD
1011 if ((evfd = eventfd (0, 0)) >= 0)
1012 {
1013 evpipe [0] = -1;
1014 fd_intern (evfd);
1015 ev_io_set (&pipeev, evfd, EV_READ);
1016 }
1017 else
1018#endif
1019 {
1020 while (pipe (evpipe))
1021 syserr ("(libev) error creating signal/async pipe");
1022
1023 fd_intern (evpipe [0]);
1024 fd_intern (evpipe [1]);
1025 ev_io_set (&pipeev, evpipe [0], EV_READ);
1026 }
1027
1028 ev_io_start (EV_A_ &pipeev);
1029 ev_unref (EV_A); /* watcher should not keep loop alive */
1030 }
1031}
1032
1033void inline_size
1034evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1035{
1036 if (!*flag)
1037 {
1038 int old_errno = errno; /* save errno because write might clobber it */
1039
1040 *flag = 1;
1041
1042#if EV_USE_EVENTFD
1043 if (evfd >= 0)
1044 {
1045 uint64_t counter = 1;
1046 write (evfd, &counter, sizeof (uint64_t));
1047 }
1048 else
1049#endif
1050 write (evpipe [1], &old_errno, 1);
1051
1052 errno = old_errno;
1053 }
1054}
1055
279static void 1056static void
1057pipecb (EV_P_ ev_io *iow, int revents)
1058{
1059#if EV_USE_EVENTFD
1060 if (evfd >= 0)
1061 {
1062 uint64_t counter;
1063 read (evfd, &counter, sizeof (uint64_t));
1064 }
1065 else
1066#endif
1067 {
1068 char dummy;
1069 read (evpipe [0], &dummy, 1);
1070 }
1071
1072 if (gotsig && ev_is_default_loop (EV_A))
1073 {
1074 int signum;
1075 gotsig = 0;
1076
1077 for (signum = signalmax; signum--; )
1078 if (signals [signum].gotsig)
1079 ev_feed_signal_event (EV_A_ signum + 1);
1080 }
1081
1082#if EV_ASYNC_ENABLE
1083 if (gotasync)
1084 {
1085 int i;
1086 gotasync = 0;
1087
1088 for (i = asynccnt; i--; )
1089 if (asyncs [i]->sent)
1090 {
1091 asyncs [i]->sent = 0;
1092 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1093 }
1094 }
1095#endif
1096}
1097
1098/*****************************************************************************/
1099
1100static void
280sighandler (int signum) 1101ev_sighandler (int signum)
281{ 1102{
1103#if EV_MULTIPLICITY
1104 struct ev_loop *loop = &default_loop_struct;
1105#endif
1106
1107#if _WIN32
1108 signal (signum, ev_sighandler);
1109#endif
1110
282 signals [signum - 1].gotsig = 1; 1111 signals [signum - 1].gotsig = 1;
1112 evpipe_write (EV_A_ &gotsig);
1113}
283 1114
284 if (!gotsig) 1115void noinline
1116ev_feed_signal_event (EV_P_ int signum)
1117{
1118 WL w;
1119
1120#if EV_MULTIPLICITY
1121 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1122#endif
1123
1124 --signum;
1125
1126 if (signum < 0 || signum >= signalmax)
1127 return;
1128
1129 signals [signum].gotsig = 0;
1130
1131 for (w = signals [signum].head; w; w = w->next)
1132 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1133}
1134
1135/*****************************************************************************/
1136
1137static WL childs [EV_PID_HASHSIZE];
1138
1139#ifndef _WIN32
1140
1141static ev_signal childev;
1142
1143#ifndef WIFCONTINUED
1144# define WIFCONTINUED(status) 0
1145#endif
1146
1147void inline_speed
1148child_reap (EV_P_ int chain, int pid, int status)
1149{
1150 ev_child *w;
1151 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1152
1153 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1154 {
1155 if ((w->pid == pid || !w->pid)
1156 && (!traced || (w->flags & 1)))
1157 {
1158 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1159 w->rpid = pid;
1160 w->rstatus = status;
1161 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1162 }
1163 }
1164}
1165
1166#ifndef WCONTINUED
1167# define WCONTINUED 0
1168#endif
1169
1170static void
1171childcb (EV_P_ ev_signal *sw, int revents)
1172{
1173 int pid, status;
1174
1175 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1176 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1177 if (!WCONTINUED
1178 || errno != EINVAL
1179 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1180 return;
1181
1182 /* make sure we are called again until all children have been reaped */
1183 /* we need to do it this way so that the callback gets called before we continue */
1184 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1185
1186 child_reap (EV_A_ pid, pid, status);
1187 if (EV_PID_HASHSIZE > 1)
1188 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1189}
1190
1191#endif
1192
1193/*****************************************************************************/
1194
1195#if EV_USE_PORT
1196# include "ev_port.c"
1197#endif
1198#if EV_USE_KQUEUE
1199# include "ev_kqueue.c"
1200#endif
1201#if EV_USE_EPOLL
1202# include "ev_epoll.c"
1203#endif
1204#if EV_USE_POLL
1205# include "ev_poll.c"
1206#endif
1207#if EV_USE_SELECT
1208# include "ev_select.c"
1209#endif
1210
1211int
1212ev_version_major (void)
1213{
1214 return EV_VERSION_MAJOR;
1215}
1216
1217int
1218ev_version_minor (void)
1219{
1220 return EV_VERSION_MINOR;
1221}
1222
1223/* return true if we are running with elevated privileges and should ignore env variables */
1224int inline_size
1225enable_secure (void)
1226{
1227#ifdef _WIN32
1228 return 0;
1229#else
1230 return getuid () != geteuid ()
1231 || getgid () != getegid ();
1232#endif
1233}
1234
1235unsigned int
1236ev_supported_backends (void)
1237{
1238 unsigned int flags = 0;
1239
1240 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1241 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1242 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1243 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1244 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1245
1246 return flags;
1247}
1248
1249unsigned int
1250ev_recommended_backends (void)
1251{
1252 unsigned int flags = ev_supported_backends ();
1253
1254#ifndef __NetBSD__
1255 /* kqueue is borked on everything but netbsd apparently */
1256 /* it usually doesn't work correctly on anything but sockets and pipes */
1257 flags &= ~EVBACKEND_KQUEUE;
1258#endif
1259#ifdef __APPLE__
1260 // flags &= ~EVBACKEND_KQUEUE; for documentation
1261 flags &= ~EVBACKEND_POLL;
1262#endif
1263
1264 return flags;
1265}
1266
1267unsigned int
1268ev_embeddable_backends (void)
1269{
1270 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1271
1272 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1273 /* please fix it and tell me how to detect the fix */
1274 flags &= ~EVBACKEND_EPOLL;
1275
1276 return flags;
1277}
1278
1279unsigned int
1280ev_backend (EV_P)
1281{
1282 return backend;
1283}
1284
1285unsigned int
1286ev_loop_count (EV_P)
1287{
1288 return loop_count;
1289}
1290
1291void
1292ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1293{
1294 io_blocktime = interval;
1295}
1296
1297void
1298ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1299{
1300 timeout_blocktime = interval;
1301}
1302
1303static void noinline
1304loop_init (EV_P_ unsigned int flags)
1305{
1306 if (!backend)
1307 {
1308#if EV_USE_MONOTONIC
285 { 1309 {
1310 struct timespec ts;
1311 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1312 have_monotonic = 1;
1313 }
1314#endif
1315
1316 ev_rt_now = ev_time ();
1317 mn_now = get_clock ();
1318 now_floor = mn_now;
1319 rtmn_diff = ev_rt_now - mn_now;
1320
1321 io_blocktime = 0.;
1322 timeout_blocktime = 0.;
1323 backend = 0;
1324 backend_fd = -1;
1325 gotasync = 0;
1326#if EV_USE_INOTIFY
1327 fs_fd = -2;
1328#endif
1329
1330 /* pid check not overridable via env */
1331#ifndef _WIN32
1332 if (flags & EVFLAG_FORKCHECK)
1333 curpid = getpid ();
1334#endif
1335
1336 if (!(flags & EVFLAG_NOENV)
1337 && !enable_secure ()
1338 && getenv ("LIBEV_FLAGS"))
1339 flags = atoi (getenv ("LIBEV_FLAGS"));
1340
1341 if (!(flags & 0x0000ffffU))
1342 flags |= ev_recommended_backends ();
1343
1344#if EV_USE_PORT
1345 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1346#endif
1347#if EV_USE_KQUEUE
1348 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1349#endif
1350#if EV_USE_EPOLL
1351 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1352#endif
1353#if EV_USE_POLL
1354 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1355#endif
1356#if EV_USE_SELECT
1357 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1358#endif
1359
1360 ev_init (&pipeev, pipecb);
1361 ev_set_priority (&pipeev, EV_MAXPRI);
1362 }
1363}
1364
1365static void noinline
1366loop_destroy (EV_P)
1367{
1368 int i;
1369
1370 if (ev_is_active (&pipeev))
1371 {
1372 ev_ref (EV_A); /* signal watcher */
1373 ev_io_stop (EV_A_ &pipeev);
1374
1375#if EV_USE_EVENTFD
1376 if (evfd >= 0)
1377 close (evfd);
1378#endif
1379
1380 if (evpipe [0] >= 0)
1381 {
1382 close (evpipe [0]);
1383 close (evpipe [1]);
1384 }
1385 }
1386
1387#if EV_USE_INOTIFY
1388 if (fs_fd >= 0)
1389 close (fs_fd);
1390#endif
1391
1392 if (backend_fd >= 0)
1393 close (backend_fd);
1394
1395#if EV_USE_PORT
1396 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1397#endif
1398#if EV_USE_KQUEUE
1399 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1400#endif
1401#if EV_USE_EPOLL
1402 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1403#endif
1404#if EV_USE_POLL
1405 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1406#endif
1407#if EV_USE_SELECT
1408 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1409#endif
1410
1411 for (i = NUMPRI; i--; )
1412 {
1413 array_free (pending, [i]);
1414#if EV_IDLE_ENABLE
1415 array_free (idle, [i]);
1416#endif
1417 }
1418
1419 ev_free (anfds); anfdmax = 0;
1420
1421 /* have to use the microsoft-never-gets-it-right macro */
1422 array_free (fdchange, EMPTY);
1423 array_free (timer, EMPTY);
1424#if EV_PERIODIC_ENABLE
1425 array_free (periodic, EMPTY);
1426#endif
1427#if EV_FORK_ENABLE
1428 array_free (fork, EMPTY);
1429#endif
1430 array_free (prepare, EMPTY);
1431 array_free (check, EMPTY);
1432#if EV_ASYNC_ENABLE
1433 array_free (async, EMPTY);
1434#endif
1435
1436 backend = 0;
1437}
1438
1439#if EV_USE_INOTIFY
1440void inline_size infy_fork (EV_P);
1441#endif
1442
1443void inline_size
1444loop_fork (EV_P)
1445{
1446#if EV_USE_PORT
1447 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1448#endif
1449#if EV_USE_KQUEUE
1450 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1451#endif
1452#if EV_USE_EPOLL
1453 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1454#endif
1455#if EV_USE_INOTIFY
1456 infy_fork (EV_A);
1457#endif
1458
1459 if (ev_is_active (&pipeev))
1460 {
1461 /* this "locks" the handlers against writing to the pipe */
1462 /* while we modify the fd vars */
286 gotsig = 1; 1463 gotsig = 1;
287 write (sigpipe [1], &gotsig, 1); 1464#if EV_ASYNC_ENABLE
288 } 1465 gotasync = 1;
289} 1466#endif
290 1467
291static void 1468 ev_ref (EV_A);
292sigcb (struct ev_io *iow, int revents) 1469 ev_io_stop (EV_A_ &pipeev);
1470
1471#if EV_USE_EVENTFD
1472 if (evfd >= 0)
1473 close (evfd);
1474#endif
1475
1476 if (evpipe [0] >= 0)
1477 {
1478 close (evpipe [0]);
1479 close (evpipe [1]);
1480 }
1481
1482 evpipe_init (EV_A);
1483 /* now iterate over everything, in case we missed something */
1484 pipecb (EV_A_ &pipeev, EV_READ);
1485 }
1486
1487 postfork = 0;
1488}
1489
1490#if EV_MULTIPLICITY
1491
1492struct ev_loop *
1493ev_loop_new (unsigned int flags)
293{ 1494{
294 struct ev_signal *w; 1495 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1496
1497 memset (loop, 0, sizeof (struct ev_loop));
1498
1499 loop_init (EV_A_ flags);
1500
1501 if (ev_backend (EV_A))
1502 return loop;
1503
1504 return 0;
1505}
1506
1507void
1508ev_loop_destroy (EV_P)
1509{
1510 loop_destroy (EV_A);
1511 ev_free (loop);
1512}
1513
1514void
1515ev_loop_fork (EV_P)
1516{
1517 postfork = 1; /* must be in line with ev_default_fork */
1518}
1519
1520#if EV_VERIFY
1521static void noinline
1522verify_watcher (EV_P_ W w)
1523{
1524 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1525
1526 if (w->pending)
1527 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1528}
1529
1530static void noinline
1531verify_heap (EV_P_ ANHE *heap, int N)
1532{
295 int sig; 1533 int i;
296 1534
297 gotsig = 0; 1535 for (i = HEAP0; i < N + HEAP0; ++i)
298 read (sigpipe [0], &revents, 1); 1536 {
1537 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1538 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1539 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
299 1540
300 for (sig = signalmax; sig--; ) 1541 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
301 if (signals [sig].gotsig) 1542 }
1543}
1544
1545static void noinline
1546array_verify (EV_P_ W *ws, int cnt)
1547{
1548 while (cnt--)
1549 {
1550 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1551 verify_watcher (EV_A_ ws [cnt]);
1552 }
1553}
1554#endif
1555
1556void
1557ev_loop_verify (EV_P)
1558{
1559#if EV_VERIFY
1560 int i;
1561 WL w;
1562
1563 assert (activecnt >= -1);
1564
1565 assert (fdchangemax >= fdchangecnt);
1566 for (i = 0; i < fdchangecnt; ++i)
1567 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1568
1569 assert (anfdmax >= 0);
1570 for (i = 0; i < anfdmax; ++i)
1571 for (w = anfds [i].head; w; w = w->next)
302 { 1572 {
303 signals [sig].gotsig = 0; 1573 verify_watcher (EV_A_ (W)w);
304 1574 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
305 for (w = signals [sig].head; w; w = w->next) 1575 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
306 event ((W)w, EV_SIGNAL);
307 } 1576 }
308}
309 1577
310static void 1578 assert (timermax >= timercnt);
311siginit (void) 1579 verify_heap (EV_A_ timers, timercnt);
312{
313 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315 1580
316 /* rather than sort out wether we really need nb, set it */ 1581#if EV_PERIODIC_ENABLE
317 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); 1582 assert (periodicmax >= periodiccnt);
318 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); 1583 verify_heap (EV_A_ periodics, periodiccnt);
1584#endif
319 1585
320 evio_set (&sigev, sigpipe [0], EV_READ); 1586 for (i = NUMPRI; i--; )
321 evio_start (&sigev); 1587 {
1588 assert (pendingmax [i] >= pendingcnt [i]);
1589#if EV_IDLE_ENABLE
1590 assert (idleall >= 0);
1591 assert (idlemax [i] >= idlecnt [i]);
1592 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1593#endif
1594 }
1595
1596#if EV_FORK_ENABLE
1597 assert (forkmax >= forkcnt);
1598 array_verify (EV_A_ (W *)forks, forkcnt);
1599#endif
1600
1601#if EV_ASYNC_ENABLE
1602 assert (asyncmax >= asynccnt);
1603 array_verify (EV_A_ (W *)asyncs, asynccnt);
1604#endif
1605
1606 assert (preparemax >= preparecnt);
1607 array_verify (EV_A_ (W *)prepares, preparecnt);
1608
1609 assert (checkmax >= checkcnt);
1610 array_verify (EV_A_ (W *)checks, checkcnt);
1611
1612# if 0
1613 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1614 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1615# endif
1616#endif
1617}
1618
1619#endif /* multiplicity */
1620
1621#if EV_MULTIPLICITY
1622struct ev_loop *
1623ev_default_loop_init (unsigned int flags)
1624#else
1625int
1626ev_default_loop (unsigned int flags)
1627#endif
1628{
1629 if (!ev_default_loop_ptr)
1630 {
1631#if EV_MULTIPLICITY
1632 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1633#else
1634 ev_default_loop_ptr = 1;
1635#endif
1636
1637 loop_init (EV_A_ flags);
1638
1639 if (ev_backend (EV_A))
1640 {
1641#ifndef _WIN32
1642 ev_signal_init (&childev, childcb, SIGCHLD);
1643 ev_set_priority (&childev, EV_MAXPRI);
1644 ev_signal_start (EV_A_ &childev);
1645 ev_unref (EV_A); /* child watcher should not keep loop alive */
1646#endif
1647 }
1648 else
1649 ev_default_loop_ptr = 0;
1650 }
1651
1652 return ev_default_loop_ptr;
1653}
1654
1655void
1656ev_default_destroy (void)
1657{
1658#if EV_MULTIPLICITY
1659 struct ev_loop *loop = ev_default_loop_ptr;
1660#endif
1661
1662#ifndef _WIN32
1663 ev_ref (EV_A); /* child watcher */
1664 ev_signal_stop (EV_A_ &childev);
1665#endif
1666
1667 loop_destroy (EV_A);
1668}
1669
1670void
1671ev_default_fork (void)
1672{
1673#if EV_MULTIPLICITY
1674 struct ev_loop *loop = ev_default_loop_ptr;
1675#endif
1676
1677 if (backend)
1678 postfork = 1; /* must be in line with ev_loop_fork */
322} 1679}
323 1680
324/*****************************************************************************/ 1681/*****************************************************************************/
325 1682
326static struct ev_idle **idles; 1683void
327static int idlemax, idlecnt; 1684ev_invoke (EV_P_ void *w, int revents)
328
329static struct ev_prepare **prepares;
330static int preparemax, preparecnt;
331
332static struct ev_check **checks;
333static int checkmax, checkcnt;
334
335/*****************************************************************************/
336
337#if HAVE_EPOLL
338# include "ev_epoll.c"
339#endif
340#if HAVE_SELECT
341# include "ev_select.c"
342#endif
343
344int ev_init (int flags)
345{ 1685{
346#if HAVE_MONOTONIC 1686 EV_CB_INVOKE ((W)w, revents);
347 {
348 struct timespec ts;
349 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
350 have_monotonic = 1;
351 }
352#endif
353
354 ev_now = ev_time ();
355 now = get_clock ();
356 diff = ev_now - now;
357
358 if (pipe (sigpipe))
359 return 0;
360
361 ev_method = EVMETHOD_NONE;
362#if HAVE_EPOLL
363 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
364#endif
365#if HAVE_SELECT
366 if (ev_method == EVMETHOD_NONE) select_init (flags);
367#endif
368
369 if (ev_method)
370 {
371 evw_init (&sigev, sigcb);
372 siginit ();
373 }
374
375 return ev_method;
376} 1687}
377 1688
378/*****************************************************************************/ 1689void inline_speed
379 1690call_pending (EV_P)
380void ev_prefork (void)
381{ 1691{
382 /* nop */
383}
384
385void ev_postfork_parent (void)
386{
387 /* nop */
388}
389
390void ev_postfork_child (void)
391{
392#if HAVE_EPOLL
393 if (ev_method == EVMETHOD_EPOLL)
394 epoll_postfork_child ();
395#endif
396
397 evio_stop (&sigev);
398 close (sigpipe [0]);
399 close (sigpipe [1]);
400 pipe (sigpipe);
401 siginit ();
402}
403
404/*****************************************************************************/
405
406static void
407fd_reify (void)
408{
409 int i; 1692 int pri;
410 1693
411 for (i = 0; i < fdchangecnt; ++i) 1694 for (pri = NUMPRI; pri--; )
1695 while (pendingcnt [pri])
412 { 1696 {
413 int fd = fdchanges [i]; 1697 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
414 ANFD *anfd = anfds + fd;
415 struct ev_io *w;
416 1698
417 int wev = 0; 1699 if (expect_true (p->w))
1700 {
1701 /*assert (("non-pending watcher on pending list", p->w->pending));*/
418 1702
419 for (w = anfd->head; w; w = w->next) 1703 p->w->pending = 0;
420 wev |= w->events; 1704 EV_CB_INVOKE (p->w, p->events);
1705 EV_FREQUENT_CHECK;
1706 }
1707 }
1708}
421 1709
422 if (anfd->wev != wev) 1710#if EV_IDLE_ENABLE
1711void inline_size
1712idle_reify (EV_P)
1713{
1714 if (expect_false (idleall))
1715 {
1716 int pri;
1717
1718 for (pri = NUMPRI; pri--; )
423 { 1719 {
424 method_modify (fd, anfd->wev, wev); 1720 if (pendingcnt [pri])
425 anfd->wev = wev; 1721 break;
1722
1723 if (idlecnt [pri])
1724 {
1725 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1726 break;
1727 }
426 } 1728 }
427 } 1729 }
428
429 fdchangecnt = 0;
430} 1730}
1731#endif
431 1732
432static void 1733void inline_size
433call_pending ()
434{
435 while (pendingcnt)
436 {
437 ANPENDING *p = pendings + --pendingcnt;
438
439 if (p->w)
440 {
441 p->w->pending = 0;
442 p->w->cb (p->w, p->events);
443 }
444 }
445}
446
447static void
448timers_reify () 1734timers_reify (EV_P)
449{ 1735{
1736 EV_FREQUENT_CHECK;
1737
450 while (timercnt && timers [0]->at <= now) 1738 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
451 { 1739 {
452 struct ev_timer *w = timers [0]; 1740 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
453 1741
454 event ((W)w, EV_TIMEOUT); 1742 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
455 1743
456 /* first reschedule or stop timer */ 1744 /* first reschedule or stop timer */
457 if (w->repeat) 1745 if (w->repeat)
458 { 1746 {
459 w->at = now + w->repeat; 1747 ev_at (w) += w->repeat;
460 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1748 if (ev_at (w) < mn_now)
1749 ev_at (w) = mn_now;
1750
1751 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1752
1753 ANHE_at_cache (timers [HEAP0]);
461 downheap ((WT *)timers, timercnt, 0); 1754 downheap (timers, timercnt, HEAP0);
462 } 1755 }
463 else 1756 else
464 evtimer_stop (w); /* nonrepeating: stop timer */ 1757 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
465 }
466}
467 1758
468static void 1759 EV_FREQUENT_CHECK;
1760 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1761 }
1762}
1763
1764#if EV_PERIODIC_ENABLE
1765void inline_size
469periodics_reify () 1766periodics_reify (EV_P)
470{ 1767{
1768 EV_FREQUENT_CHECK;
1769
471 while (periodiccnt && periodics [0]->at <= ev_now) 1770 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
472 { 1771 {
473 struct ev_periodic *w = periodics [0]; 1772 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1773
1774 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
474 1775
475 /* first reschedule or stop timer */ 1776 /* first reschedule or stop timer */
476 if (w->interval) 1777 if (w->reschedule_cb)
477 { 1778 {
478 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1779 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
479 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1780
1781 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1782
1783 ANHE_at_cache (periodics [HEAP0]);
480 downheap ((WT *)periodics, periodiccnt, 0); 1784 downheap (periodics, periodiccnt, HEAP0);
1785 }
1786 else if (w->interval)
1787 {
1788 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1789 /* if next trigger time is not sufficiently in the future, put it there */
1790 /* this might happen because of floating point inexactness */
1791 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1792 {
1793 ev_at (w) += w->interval;
1794
1795 /* if interval is unreasonably low we might still have a time in the past */
1796 /* so correct this. this will make the periodic very inexact, but the user */
1797 /* has effectively asked to get triggered more often than possible */
1798 if (ev_at (w) < ev_rt_now)
1799 ev_at (w) = ev_rt_now;
1800 }
1801
1802 ANHE_at_cache (periodics [HEAP0]);
1803 downheap (periodics, periodiccnt, HEAP0);
481 } 1804 }
482 else 1805 else
483 evperiodic_stop (w); /* nonrepeating: stop timer */ 1806 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
484 1807
485 event ((W)w, EV_TIMEOUT); 1808 EV_FREQUENT_CHECK;
1809 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
486 } 1810 }
487} 1811}
488 1812
489static void 1813static void noinline
490periodics_reschedule (ev_tstamp diff) 1814periodics_reschedule (EV_P)
491{ 1815{
492 int i; 1816 int i;
493 1817
494 /* adjust periodics after time jump */ 1818 /* adjust periodics after time jump */
495 for (i = 0; i < periodiccnt; ++i) 1819 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
496 { 1820 {
497 struct ev_periodic *w = periodics [i]; 1821 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
498 1822
1823 if (w->reschedule_cb)
1824 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
499 if (w->interval) 1825 else if (w->interval)
1826 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1827
1828 ANHE_at_cache (periodics [i]);
1829 }
1830
1831 reheap (periodics, periodiccnt);
1832}
1833#endif
1834
1835void inline_speed
1836time_update (EV_P_ ev_tstamp max_block)
1837{
1838 int i;
1839
1840#if EV_USE_MONOTONIC
1841 if (expect_true (have_monotonic))
1842 {
1843 ev_tstamp odiff = rtmn_diff;
1844
1845 mn_now = get_clock ();
1846
1847 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1848 /* interpolate in the meantime */
1849 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
500 { 1850 {
501 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1851 ev_rt_now = rtmn_diff + mn_now;
1852 return;
1853 }
502 1854
503 if (fabs (diff) >= 1e-4) 1855 now_floor = mn_now;
1856 ev_rt_now = ev_time ();
1857
1858 /* loop a few times, before making important decisions.
1859 * on the choice of "4": one iteration isn't enough,
1860 * in case we get preempted during the calls to
1861 * ev_time and get_clock. a second call is almost guaranteed
1862 * to succeed in that case, though. and looping a few more times
1863 * doesn't hurt either as we only do this on time-jumps or
1864 * in the unlikely event of having been preempted here.
1865 */
1866 for (i = 4; --i; )
1867 {
1868 rtmn_diff = ev_rt_now - mn_now;
1869
1870 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1871 return; /* all is well */
1872
1873 ev_rt_now = ev_time ();
1874 mn_now = get_clock ();
1875 now_floor = mn_now;
1876 }
1877
1878# if EV_PERIODIC_ENABLE
1879 periodics_reschedule (EV_A);
1880# endif
1881 /* no timer adjustment, as the monotonic clock doesn't jump */
1882 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1883 }
1884 else
1885#endif
1886 {
1887 ev_rt_now = ev_time ();
1888
1889 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1890 {
1891#if EV_PERIODIC_ENABLE
1892 periodics_reschedule (EV_A);
1893#endif
1894 /* adjust timers. this is easy, as the offset is the same for all of them */
1895 for (i = 0; i < timercnt; ++i)
504 { 1896 {
505 evperiodic_stop (w); 1897 ANHE *he = timers + i + HEAP0;
506 evperiodic_start (w); 1898 ANHE_w (*he)->at += ev_rt_now - mn_now;
507 1899 ANHE_at_cache (*he);
508 i = 0; /* restart loop, inefficient, but time jumps should be rare */
509 } 1900 }
510 } 1901 }
511 }
512}
513 1902
514static void 1903 mn_now = ev_rt_now;
515time_update ()
516{
517 int i;
518
519 ev_now = ev_time ();
520
521 if (have_monotonic)
522 { 1904 }
523 ev_tstamp odiff = diff; 1905}
524 1906
525 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1907void
1908ev_ref (EV_P)
1909{
1910 ++activecnt;
1911}
1912
1913void
1914ev_unref (EV_P)
1915{
1916 --activecnt;
1917}
1918
1919void
1920ev_now_update (EV_P)
1921{
1922 time_update (EV_A_ 1e100);
1923}
1924
1925static int loop_done;
1926
1927void
1928ev_loop (EV_P_ int flags)
1929{
1930 loop_done = EVUNLOOP_CANCEL;
1931
1932 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1933
1934 do
1935 {
1936#if EV_VERIFY >= 2
1937 ev_loop_verify (EV_A);
1938#endif
1939
1940#ifndef _WIN32
1941 if (expect_false (curpid)) /* penalise the forking check even more */
1942 if (expect_false (getpid () != curpid))
1943 {
1944 curpid = getpid ();
1945 postfork = 1;
1946 }
1947#endif
1948
1949#if EV_FORK_ENABLE
1950 /* we might have forked, so queue fork handlers */
1951 if (expect_false (postfork))
1952 if (forkcnt)
1953 {
1954 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1955 call_pending (EV_A);
1956 }
1957#endif
1958
1959 /* queue prepare watchers (and execute them) */
1960 if (expect_false (preparecnt))
526 { 1961 {
527 now = get_clock (); 1962 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
528 diff = ev_now - now; 1963 call_pending (EV_A);
529
530 if (fabs (odiff - diff) < MIN_TIMEJUMP)
531 return; /* all is well */
532
533 ev_now = ev_time ();
534 } 1964 }
535 1965
536 periodics_reschedule (diff - odiff); 1966 if (expect_false (!activecnt))
537 /* no timer adjustment, as the monotonic clock doesn't jump */ 1967 break;
538 }
539 else
540 {
541 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
542 {
543 periodics_reschedule (ev_now - now);
544 1968
545 /* adjust timers. this is easy, as the offset is the same for all */ 1969 /* we might have forked, so reify kernel state if necessary */
546 for (i = 0; i < timercnt; ++i) 1970 if (expect_false (postfork))
547 timers [i]->at += diff; 1971 loop_fork (EV_A);
548 }
549
550 now = ev_now;
551 }
552}
553
554int ev_loop_done;
555
556void ev_loop (int flags)
557{
558 double block;
559 ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
560
561 do
562 {
563 /* queue check watchers (and execute them) */
564 if (checkcnt)
565 {
566 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
567 call_pending ();
568 }
569 1972
570 /* update fd-related kernel structures */ 1973 /* update fd-related kernel structures */
571 fd_reify (); 1974 fd_reify (EV_A);
572 1975
573 /* calculate blocking time */ 1976 /* calculate blocking time */
1977 {
1978 ev_tstamp waittime = 0.;
1979 ev_tstamp sleeptime = 0.;
574 1980
575 /* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */ 1981 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
576 ev_now = ev_time ();
577
578 if (flags & EVLOOP_NONBLOCK || idlecnt)
579 block = 0.;
580 else
581 { 1982 {
1983 /* update time to cancel out callback processing overhead */
1984 time_update (EV_A_ 1e100);
1985
582 block = MAX_BLOCKTIME; 1986 waittime = MAX_BLOCKTIME;
583 1987
584 if (timercnt) 1988 if (timercnt)
585 { 1989 {
586 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 1990 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
587 if (block > to) block = to; 1991 if (waittime > to) waittime = to;
588 } 1992 }
589 1993
1994#if EV_PERIODIC_ENABLE
590 if (periodiccnt) 1995 if (periodiccnt)
591 { 1996 {
592 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1997 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
593 if (block > to) block = to; 1998 if (waittime > to) waittime = to;
594 } 1999 }
2000#endif
595 2001
596 if (block < 0.) block = 0.; 2002 if (expect_false (waittime < timeout_blocktime))
2003 waittime = timeout_blocktime;
2004
2005 sleeptime = waittime - backend_fudge;
2006
2007 if (expect_true (sleeptime > io_blocktime))
2008 sleeptime = io_blocktime;
2009
2010 if (sleeptime)
2011 {
2012 ev_sleep (sleeptime);
2013 waittime -= sleeptime;
2014 }
597 } 2015 }
598 2016
599 method_poll (block); 2017 ++loop_count;
2018 backend_poll (EV_A_ waittime);
600 2019
601 /* update ev_now, do magic */ 2020 /* update ev_rt_now, do magic */
602 time_update (); 2021 time_update (EV_A_ waittime + sleeptime);
2022 }
603 2023
604 /* queue pending timers and reschedule them */ 2024 /* queue pending timers and reschedule them */
605 timers_reify (); /* relative timers called last */ 2025 timers_reify (EV_A); /* relative timers called last */
2026#if EV_PERIODIC_ENABLE
606 periodics_reify (); /* absolute timers called first */ 2027 periodics_reify (EV_A); /* absolute timers called first */
2028#endif
607 2029
2030#if EV_IDLE_ENABLE
608 /* queue idle watchers unless io or timers are pending */ 2031 /* queue idle watchers unless other events are pending */
609 if (!pendingcnt) 2032 idle_reify (EV_A);
610 queue_events ((W *)idles, idlecnt, EV_IDLE); 2033#endif
611 2034
612 /* queue check watchers, to be executed first */ 2035 /* queue check watchers, to be executed first */
613 if (checkcnt) 2036 if (expect_false (checkcnt))
614 queue_events ((W *)checks, checkcnt, EV_CHECK); 2037 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
615 2038
616 call_pending (); 2039 call_pending (EV_A);
617 } 2040 }
618 while (!ev_loop_done); 2041 while (expect_true (
2042 activecnt
2043 && !loop_done
2044 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2045 ));
619 2046
620 if (ev_loop_done != 2) 2047 if (loop_done == EVUNLOOP_ONE)
2048 loop_done = EVUNLOOP_CANCEL;
2049}
2050
2051void
2052ev_unloop (EV_P_ int how)
2053{
621 ev_loop_done = 0; 2054 loop_done = how;
622} 2055}
623 2056
624/*****************************************************************************/ 2057/*****************************************************************************/
625 2058
626static void 2059void inline_size
627wlist_add (WL *head, WL elem) 2060wlist_add (WL *head, WL elem)
628{ 2061{
629 elem->next = *head; 2062 elem->next = *head;
630 *head = elem; 2063 *head = elem;
631} 2064}
632 2065
633static void 2066void inline_size
634wlist_del (WL *head, WL elem) 2067wlist_del (WL *head, WL elem)
635{ 2068{
636 while (*head) 2069 while (*head)
637 { 2070 {
638 if (*head == elem) 2071 if (*head == elem)
… …
643 2076
644 head = &(*head)->next; 2077 head = &(*head)->next;
645 } 2078 }
646} 2079}
647 2080
648static void 2081void inline_speed
649ev_clear (W w) 2082clear_pending (EV_P_ W w)
650{ 2083{
651 if (w->pending) 2084 if (w->pending)
652 { 2085 {
653 pendings [w->pending - 1].w = 0; 2086 pendings [ABSPRI (w)][w->pending - 1].w = 0;
654 w->pending = 0; 2087 w->pending = 0;
655 } 2088 }
656} 2089}
657 2090
658static void 2091int
2092ev_clear_pending (EV_P_ void *w)
2093{
2094 W w_ = (W)w;
2095 int pending = w_->pending;
2096
2097 if (expect_true (pending))
2098 {
2099 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2100 w_->pending = 0;
2101 p->w = 0;
2102 return p->events;
2103 }
2104 else
2105 return 0;
2106}
2107
2108void inline_size
2109pri_adjust (EV_P_ W w)
2110{
2111 int pri = w->priority;
2112 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2113 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2114 w->priority = pri;
2115}
2116
2117void inline_speed
659ev_start (W w, int active) 2118ev_start (EV_P_ W w, int active)
660{ 2119{
2120 pri_adjust (EV_A_ w);
661 w->active = active; 2121 w->active = active;
2122 ev_ref (EV_A);
662} 2123}
663 2124
664static void 2125void inline_size
665ev_stop (W w) 2126ev_stop (EV_P_ W w)
666{ 2127{
2128 ev_unref (EV_A);
667 w->active = 0; 2129 w->active = 0;
668} 2130}
669 2131
670/*****************************************************************************/ 2132/*****************************************************************************/
671 2133
672void 2134void noinline
673evio_start (struct ev_io *w) 2135ev_io_start (EV_P_ ev_io *w)
674{ 2136{
2137 int fd = w->fd;
2138
675 if (ev_is_active (w)) 2139 if (expect_false (ev_is_active (w)))
676 return; 2140 return;
677 2141
678 int fd = w->fd; 2142 assert (("ev_io_start called with negative fd", fd >= 0));
679 2143
2144 EV_FREQUENT_CHECK;
2145
680 ev_start ((W)w, 1); 2146 ev_start (EV_A_ (W)w, 1);
681 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2147 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
682 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2148 wlist_add (&anfds[fd].head, (WL)w);
683 2149
684 ++fdchangecnt; 2150 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
685 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 2151 w->events &= ~EV_IOFDSET;
686 fdchanges [fdchangecnt - 1] = fd;
687}
688 2152
689void 2153 EV_FREQUENT_CHECK;
2154}
2155
2156void noinline
690evio_stop (struct ev_io *w) 2157ev_io_stop (EV_P_ ev_io *w)
691{ 2158{
692 ev_clear ((W)w); 2159 clear_pending (EV_A_ (W)w);
693 if (!ev_is_active (w)) 2160 if (expect_false (!ev_is_active (w)))
694 return; 2161 return;
695 2162
2163 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2164
2165 EV_FREQUENT_CHECK;
2166
696 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2167 wlist_del (&anfds[w->fd].head, (WL)w);
697 ev_stop ((W)w); 2168 ev_stop (EV_A_ (W)w);
698 2169
699 ++fdchangecnt; 2170 fd_change (EV_A_ w->fd, 1);
700 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
701 fdchanges [fdchangecnt - 1] = w->fd;
702}
703 2171
704void 2172 EV_FREQUENT_CHECK;
2173}
2174
2175void noinline
705evtimer_start (struct ev_timer *w) 2176ev_timer_start (EV_P_ ev_timer *w)
706{ 2177{
707 if (ev_is_active (w)) 2178 if (expect_false (ev_is_active (w)))
708 return; 2179 return;
709 2180
710 w->at += now; 2181 ev_at (w) += mn_now;
711 2182
712 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 2183 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
713 2184
714 ev_start ((W)w, ++timercnt); 2185 EV_FREQUENT_CHECK;
715 array_needsize (timers, timermax, timercnt, );
716 timers [timercnt - 1] = w;
717 upheap ((WT *)timers, timercnt - 1);
718}
719 2186
720void 2187 ++timercnt;
2188 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2189 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2190 ANHE_w (timers [ev_active (w)]) = (WT)w;
2191 ANHE_at_cache (timers [ev_active (w)]);
2192 upheap (timers, ev_active (w));
2193
2194 EV_FREQUENT_CHECK;
2195
2196 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2197}
2198
2199void noinline
721evtimer_stop (struct ev_timer *w) 2200ev_timer_stop (EV_P_ ev_timer *w)
722{ 2201{
723 ev_clear ((W)w); 2202 clear_pending (EV_A_ (W)w);
724 if (!ev_is_active (w)) 2203 if (expect_false (!ev_is_active (w)))
725 return; 2204 return;
726 2205
727 if (w->active < timercnt--) 2206 EV_FREQUENT_CHECK;
2207
2208 {
2209 int active = ev_active (w);
2210
2211 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2212
2213 --timercnt;
2214
2215 if (expect_true (active < timercnt + HEAP0))
728 { 2216 {
729 timers [w->active - 1] = timers [timercnt]; 2217 timers [active] = timers [timercnt + HEAP0];
730 downheap ((WT *)timers, timercnt, w->active - 1); 2218 adjustheap (timers, timercnt, active);
731 } 2219 }
2220 }
732 2221
733 w->at = w->repeat; 2222 EV_FREQUENT_CHECK;
734 2223
2224 ev_at (w) -= mn_now;
2225
735 ev_stop ((W)w); 2226 ev_stop (EV_A_ (W)w);
736} 2227}
737 2228
738void 2229void noinline
739evtimer_again (struct ev_timer *w) 2230ev_timer_again (EV_P_ ev_timer *w)
740{ 2231{
2232 EV_FREQUENT_CHECK;
2233
741 if (ev_is_active (w)) 2234 if (ev_is_active (w))
742 { 2235 {
743 if (w->repeat) 2236 if (w->repeat)
744 { 2237 {
745 w->at = now + w->repeat; 2238 ev_at (w) = mn_now + w->repeat;
2239 ANHE_at_cache (timers [ev_active (w)]);
746 downheap ((WT *)timers, timercnt, w->active - 1); 2240 adjustheap (timers, timercnt, ev_active (w));
747 } 2241 }
748 else 2242 else
749 evtimer_stop (w); 2243 ev_timer_stop (EV_A_ w);
750 } 2244 }
751 else if (w->repeat) 2245 else if (w->repeat)
2246 {
2247 ev_at (w) = w->repeat;
752 evtimer_start (w); 2248 ev_timer_start (EV_A_ w);
753} 2249 }
754 2250
755void 2251 EV_FREQUENT_CHECK;
2252}
2253
2254#if EV_PERIODIC_ENABLE
2255void noinline
756evperiodic_start (struct ev_periodic *w) 2256ev_periodic_start (EV_P_ ev_periodic *w)
757{ 2257{
758 if (ev_is_active (w)) 2258 if (expect_false (ev_is_active (w)))
759 return; 2259 return;
760 2260
761 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 2261 if (w->reschedule_cb)
762 2262 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2263 else if (w->interval)
2264 {
2265 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
763 /* this formula differs from the one in periodic_reify because we do not always round up */ 2266 /* this formula differs from the one in periodic_reify because we do not always round up */
764 if (w->interval)
765 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 2267 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2268 }
2269 else
2270 ev_at (w) = w->offset;
766 2271
2272 EV_FREQUENT_CHECK;
2273
2274 ++periodiccnt;
767 ev_start ((W)w, ++periodiccnt); 2275 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
768 array_needsize (periodics, periodicmax, periodiccnt, ); 2276 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
769 periodics [periodiccnt - 1] = w; 2277 ANHE_w (periodics [ev_active (w)]) = (WT)w;
770 upheap ((WT *)periodics, periodiccnt - 1); 2278 ANHE_at_cache (periodics [ev_active (w)]);
771} 2279 upheap (periodics, ev_active (w));
772 2280
773void 2281 EV_FREQUENT_CHECK;
2282
2283 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2284}
2285
2286void noinline
774evperiodic_stop (struct ev_periodic *w) 2287ev_periodic_stop (EV_P_ ev_periodic *w)
775{ 2288{
776 ev_clear ((W)w); 2289 clear_pending (EV_A_ (W)w);
777 if (!ev_is_active (w)) 2290 if (expect_false (!ev_is_active (w)))
778 return; 2291 return;
779 2292
780 if (w->active < periodiccnt--) 2293 EV_FREQUENT_CHECK;
2294
2295 {
2296 int active = ev_active (w);
2297
2298 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2299
2300 --periodiccnt;
2301
2302 if (expect_true (active < periodiccnt + HEAP0))
781 { 2303 {
782 periodics [w->active - 1] = periodics [periodiccnt]; 2304 periodics [active] = periodics [periodiccnt + HEAP0];
783 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2305 adjustheap (periodics, periodiccnt, active);
784 } 2306 }
2307 }
785 2308
2309 EV_FREQUENT_CHECK;
2310
786 ev_stop ((W)w); 2311 ev_stop (EV_A_ (W)w);
787} 2312}
788 2313
789void 2314void noinline
2315ev_periodic_again (EV_P_ ev_periodic *w)
2316{
2317 /* TODO: use adjustheap and recalculation */
2318 ev_periodic_stop (EV_A_ w);
2319 ev_periodic_start (EV_A_ w);
2320}
2321#endif
2322
2323#ifndef SA_RESTART
2324# define SA_RESTART 0
2325#endif
2326
2327void noinline
790evsignal_start (struct ev_signal *w) 2328ev_signal_start (EV_P_ ev_signal *w)
791{ 2329{
2330#if EV_MULTIPLICITY
2331 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2332#endif
792 if (ev_is_active (w)) 2333 if (expect_false (ev_is_active (w)))
793 return; 2334 return;
794 2335
795 ev_start ((W)w, 1); 2336 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2337
2338 evpipe_init (EV_A);
2339
2340 EV_FREQUENT_CHECK;
2341
2342 {
2343#ifndef _WIN32
2344 sigset_t full, prev;
2345 sigfillset (&full);
2346 sigprocmask (SIG_SETMASK, &full, &prev);
2347#endif
2348
796 array_needsize (signals, signalmax, w->signum, signals_init); 2349 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2350
2351#ifndef _WIN32
2352 sigprocmask (SIG_SETMASK, &prev, 0);
2353#endif
2354 }
2355
2356 ev_start (EV_A_ (W)w, 1);
797 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2357 wlist_add (&signals [w->signum - 1].head, (WL)w);
798 2358
799 if (!w->next) 2359 if (!((WL)w)->next)
800 { 2360 {
2361#if _WIN32
2362 signal (w->signum, ev_sighandler);
2363#else
801 struct sigaction sa; 2364 struct sigaction sa;
802 sa.sa_handler = sighandler; 2365 sa.sa_handler = ev_sighandler;
803 sigfillset (&sa.sa_mask); 2366 sigfillset (&sa.sa_mask);
804 sa.sa_flags = 0; 2367 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
805 sigaction (w->signum, &sa, 0); 2368 sigaction (w->signum, &sa, 0);
2369#endif
806 } 2370 }
807}
808 2371
809void 2372 EV_FREQUENT_CHECK;
2373}
2374
2375void noinline
810evsignal_stop (struct ev_signal *w) 2376ev_signal_stop (EV_P_ ev_signal *w)
811{ 2377{
812 ev_clear ((W)w); 2378 clear_pending (EV_A_ (W)w);
813 if (!ev_is_active (w)) 2379 if (expect_false (!ev_is_active (w)))
814 return; 2380 return;
815 2381
2382 EV_FREQUENT_CHECK;
2383
816 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2384 wlist_del (&signals [w->signum - 1].head, (WL)w);
817 ev_stop ((W)w); 2385 ev_stop (EV_A_ (W)w);
818 2386
819 if (!signals [w->signum - 1].head) 2387 if (!signals [w->signum - 1].head)
820 signal (w->signum, SIG_DFL); 2388 signal (w->signum, SIG_DFL);
821}
822 2389
823void evidle_start (struct ev_idle *w) 2390 EV_FREQUENT_CHECK;
2391}
2392
2393void
2394ev_child_start (EV_P_ ev_child *w)
824{ 2395{
2396#if EV_MULTIPLICITY
2397 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2398#endif
825 if (ev_is_active (w)) 2399 if (expect_false (ev_is_active (w)))
826 return; 2400 return;
827 2401
828 ev_start ((W)w, ++idlecnt); 2402 EV_FREQUENT_CHECK;
829 array_needsize (idles, idlemax, idlecnt, );
830 idles [idlecnt - 1] = w;
831}
832 2403
833void evidle_stop (struct ev_idle *w) 2404 ev_start (EV_A_ (W)w, 1);
2405 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2406
2407 EV_FREQUENT_CHECK;
2408}
2409
2410void
2411ev_child_stop (EV_P_ ev_child *w)
834{ 2412{
835 ev_clear ((W)w); 2413 clear_pending (EV_A_ (W)w);
836 if (ev_is_active (w)) 2414 if (expect_false (!ev_is_active (w)))
837 return; 2415 return;
838 2416
839 idles [w->active - 1] = idles [--idlecnt]; 2417 EV_FREQUENT_CHECK;
2418
2419 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
840 ev_stop ((W)w); 2420 ev_stop (EV_A_ (W)w);
841}
842 2421
843void evprepare_start (struct ev_prepare *w) 2422 EV_FREQUENT_CHECK;
2423}
2424
2425#if EV_STAT_ENABLE
2426
2427# ifdef _WIN32
2428# undef lstat
2429# define lstat(a,b) _stati64 (a,b)
2430# endif
2431
2432#define DEF_STAT_INTERVAL 5.0074891
2433#define MIN_STAT_INTERVAL 0.1074891
2434
2435static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2436
2437#if EV_USE_INOTIFY
2438# define EV_INOTIFY_BUFSIZE 8192
2439
2440static void noinline
2441infy_add (EV_P_ ev_stat *w)
844{ 2442{
845 if (ev_is_active (w)) 2443 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);
2444
2445 if (w->wd < 0)
2446 {
2447 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2448
2449 /* monitor some parent directory for speedup hints */
2450 /* note that exceeding the hardcoded limit is not a correctness issue, */
2451 /* but an efficiency issue only */
2452 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2453 {
2454 char path [4096];
2455 strcpy (path, w->path);
2456
2457 do
2458 {
2459 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2460 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2461
2462 char *pend = strrchr (path, '/');
2463
2464 if (!pend)
2465 break; /* whoops, no '/', complain to your admin */
2466
2467 *pend = 0;
2468 w->wd = inotify_add_watch (fs_fd, path, mask);
2469 }
2470 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2471 }
2472 }
2473 else
2474 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2475
2476 if (w->wd >= 0)
2477 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2478}
2479
2480static void noinline
2481infy_del (EV_P_ ev_stat *w)
2482{
2483 int slot;
2484 int wd = w->wd;
2485
2486 if (wd < 0)
846 return; 2487 return;
847 2488
2489 w->wd = -2;
2490 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2491 wlist_del (&fs_hash [slot].head, (WL)w);
2492
2493 /* remove this watcher, if others are watching it, they will rearm */
2494 inotify_rm_watch (fs_fd, wd);
2495}
2496
2497static void noinline
2498infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2499{
2500 if (slot < 0)
2501 /* overflow, need to check for all hahs slots */
2502 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2503 infy_wd (EV_A_ slot, wd, ev);
2504 else
2505 {
2506 WL w_;
2507
2508 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2509 {
2510 ev_stat *w = (ev_stat *)w_;
2511 w_ = w_->next; /* lets us remove this watcher and all before it */
2512
2513 if (w->wd == wd || wd == -1)
2514 {
2515 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2516 {
2517 w->wd = -1;
2518 infy_add (EV_A_ w); /* re-add, no matter what */
2519 }
2520
2521 stat_timer_cb (EV_A_ &w->timer, 0);
2522 }
2523 }
2524 }
2525}
2526
2527static void
2528infy_cb (EV_P_ ev_io *w, int revents)
2529{
2530 char buf [EV_INOTIFY_BUFSIZE];
2531 struct inotify_event *ev = (struct inotify_event *)buf;
2532 int ofs;
2533 int len = read (fs_fd, buf, sizeof (buf));
2534
2535 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2536 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2537}
2538
2539void inline_size
2540infy_init (EV_P)
2541{
2542 if (fs_fd != -2)
2543 return;
2544
2545 fs_fd = inotify_init ();
2546
2547 if (fs_fd >= 0)
2548 {
2549 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2550 ev_set_priority (&fs_w, EV_MAXPRI);
2551 ev_io_start (EV_A_ &fs_w);
2552 }
2553}
2554
2555void inline_size
2556infy_fork (EV_P)
2557{
2558 int slot;
2559
2560 if (fs_fd < 0)
2561 return;
2562
2563 close (fs_fd);
2564 fs_fd = inotify_init ();
2565
2566 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2567 {
2568 WL w_ = fs_hash [slot].head;
2569 fs_hash [slot].head = 0;
2570
2571 while (w_)
2572 {
2573 ev_stat *w = (ev_stat *)w_;
2574 w_ = w_->next; /* lets us add this watcher */
2575
2576 w->wd = -1;
2577
2578 if (fs_fd >= 0)
2579 infy_add (EV_A_ w); /* re-add, no matter what */
2580 else
2581 ev_timer_start (EV_A_ &w->timer);
2582 }
2583
2584 }
2585}
2586
2587#endif
2588
2589#ifdef _WIN32
2590# define EV_LSTAT(p,b) _stati64 (p, b)
2591#else
2592# define EV_LSTAT(p,b) lstat (p, b)
2593#endif
2594
2595void
2596ev_stat_stat (EV_P_ ev_stat *w)
2597{
2598 if (lstat (w->path, &w->attr) < 0)
2599 w->attr.st_nlink = 0;
2600 else if (!w->attr.st_nlink)
2601 w->attr.st_nlink = 1;
2602}
2603
2604static void noinline
2605stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2606{
2607 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2608
2609 /* we copy this here each the time so that */
2610 /* prev has the old value when the callback gets invoked */
2611 w->prev = w->attr;
2612 ev_stat_stat (EV_A_ w);
2613
2614 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2615 if (
2616 w->prev.st_dev != w->attr.st_dev
2617 || w->prev.st_ino != w->attr.st_ino
2618 || w->prev.st_mode != w->attr.st_mode
2619 || w->prev.st_nlink != w->attr.st_nlink
2620 || w->prev.st_uid != w->attr.st_uid
2621 || w->prev.st_gid != w->attr.st_gid
2622 || w->prev.st_rdev != w->attr.st_rdev
2623 || w->prev.st_size != w->attr.st_size
2624 || w->prev.st_atime != w->attr.st_atime
2625 || w->prev.st_mtime != w->attr.st_mtime
2626 || w->prev.st_ctime != w->attr.st_ctime
2627 ) {
2628 #if EV_USE_INOTIFY
2629 infy_del (EV_A_ w);
2630 infy_add (EV_A_ w);
2631 ev_stat_stat (EV_A_ w); /* avoid race... */
2632 #endif
2633
2634 ev_feed_event (EV_A_ w, EV_STAT);
2635 }
2636}
2637
2638void
2639ev_stat_start (EV_P_ ev_stat *w)
2640{
2641 if (expect_false (ev_is_active (w)))
2642 return;
2643
2644 /* since we use memcmp, we need to clear any padding data etc. */
2645 memset (&w->prev, 0, sizeof (ev_statdata));
2646 memset (&w->attr, 0, sizeof (ev_statdata));
2647
2648 ev_stat_stat (EV_A_ w);
2649
2650 if (w->interval < MIN_STAT_INTERVAL)
2651 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2652
2653 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2654 ev_set_priority (&w->timer, ev_priority (w));
2655
2656#if EV_USE_INOTIFY
2657 infy_init (EV_A);
2658
2659 if (fs_fd >= 0)
2660 infy_add (EV_A_ w);
2661 else
2662#endif
2663 ev_timer_start (EV_A_ &w->timer);
2664
2665 ev_start (EV_A_ (W)w, 1);
2666
2667 EV_FREQUENT_CHECK;
2668}
2669
2670void
2671ev_stat_stop (EV_P_ ev_stat *w)
2672{
2673 clear_pending (EV_A_ (W)w);
2674 if (expect_false (!ev_is_active (w)))
2675 return;
2676
2677 EV_FREQUENT_CHECK;
2678
2679#if EV_USE_INOTIFY
2680 infy_del (EV_A_ w);
2681#endif
2682 ev_timer_stop (EV_A_ &w->timer);
2683
2684 ev_stop (EV_A_ (W)w);
2685
2686 EV_FREQUENT_CHECK;
2687}
2688#endif
2689
2690#if EV_IDLE_ENABLE
2691void
2692ev_idle_start (EV_P_ ev_idle *w)
2693{
2694 if (expect_false (ev_is_active (w)))
2695 return;
2696
2697 pri_adjust (EV_A_ (W)w);
2698
2699 EV_FREQUENT_CHECK;
2700
2701 {
2702 int active = ++idlecnt [ABSPRI (w)];
2703
2704 ++idleall;
2705 ev_start (EV_A_ (W)w, active);
2706
2707 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2708 idles [ABSPRI (w)][active - 1] = w;
2709 }
2710
2711 EV_FREQUENT_CHECK;
2712}
2713
2714void
2715ev_idle_stop (EV_P_ ev_idle *w)
2716{
2717 clear_pending (EV_A_ (W)w);
2718 if (expect_false (!ev_is_active (w)))
2719 return;
2720
2721 EV_FREQUENT_CHECK;
2722
2723 {
2724 int active = ev_active (w);
2725
2726 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2727 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2728
2729 ev_stop (EV_A_ (W)w);
2730 --idleall;
2731 }
2732
2733 EV_FREQUENT_CHECK;
2734}
2735#endif
2736
2737void
2738ev_prepare_start (EV_P_ ev_prepare *w)
2739{
2740 if (expect_false (ev_is_active (w)))
2741 return;
2742
2743 EV_FREQUENT_CHECK;
2744
848 ev_start ((W)w, ++preparecnt); 2745 ev_start (EV_A_ (W)w, ++preparecnt);
849 array_needsize (prepares, preparemax, preparecnt, ); 2746 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
850 prepares [preparecnt - 1] = w; 2747 prepares [preparecnt - 1] = w;
851}
852 2748
2749 EV_FREQUENT_CHECK;
2750}
2751
2752void
853void evprepare_stop (struct ev_prepare *w) 2753ev_prepare_stop (EV_P_ ev_prepare *w)
854{ 2754{
855 ev_clear ((W)w); 2755 clear_pending (EV_A_ (W)w);
856 if (ev_is_active (w)) 2756 if (expect_false (!ev_is_active (w)))
857 return; 2757 return;
858 2758
2759 EV_FREQUENT_CHECK;
2760
2761 {
2762 int active = ev_active (w);
2763
859 prepares [w->active - 1] = prepares [--preparecnt]; 2764 prepares [active - 1] = prepares [--preparecnt];
2765 ev_active (prepares [active - 1]) = active;
2766 }
2767
860 ev_stop ((W)w); 2768 ev_stop (EV_A_ (W)w);
861}
862 2769
2770 EV_FREQUENT_CHECK;
2771}
2772
2773void
863void evcheck_start (struct ev_check *w) 2774ev_check_start (EV_P_ ev_check *w)
864{ 2775{
865 if (ev_is_active (w)) 2776 if (expect_false (ev_is_active (w)))
866 return; 2777 return;
867 2778
2779 EV_FREQUENT_CHECK;
2780
868 ev_start ((W)w, ++checkcnt); 2781 ev_start (EV_A_ (W)w, ++checkcnt);
869 array_needsize (checks, checkmax, checkcnt, ); 2782 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
870 checks [checkcnt - 1] = w; 2783 checks [checkcnt - 1] = w;
871}
872 2784
2785 EV_FREQUENT_CHECK;
2786}
2787
2788void
873void evcheck_stop (struct ev_check *w) 2789ev_check_stop (EV_P_ ev_check *w)
874{ 2790{
875 ev_clear ((W)w); 2791 clear_pending (EV_A_ (W)w);
876 if (ev_is_active (w)) 2792 if (expect_false (!ev_is_active (w)))
877 return; 2793 return;
878 2794
2795 EV_FREQUENT_CHECK;
2796
2797 {
2798 int active = ev_active (w);
2799
879 checks [w->active - 1] = checks [--checkcnt]; 2800 checks [active - 1] = checks [--checkcnt];
2801 ev_active (checks [active - 1]) = active;
2802 }
2803
880 ev_stop ((W)w); 2804 ev_stop (EV_A_ (W)w);
2805
2806 EV_FREQUENT_CHECK;
881} 2807}
2808
2809#if EV_EMBED_ENABLE
2810void noinline
2811ev_embed_sweep (EV_P_ ev_embed *w)
2812{
2813 ev_loop (w->other, EVLOOP_NONBLOCK);
2814}
2815
2816static void
2817embed_io_cb (EV_P_ ev_io *io, int revents)
2818{
2819 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2820
2821 if (ev_cb (w))
2822 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2823 else
2824 ev_loop (w->other, EVLOOP_NONBLOCK);
2825}
2826
2827static void
2828embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2829{
2830 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2831
2832 {
2833 struct ev_loop *loop = w->other;
2834
2835 while (fdchangecnt)
2836 {
2837 fd_reify (EV_A);
2838 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2839 }
2840 }
2841}
2842
2843static void
2844embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2845{
2846 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2847
2848 {
2849 struct ev_loop *loop = w->other;
2850
2851 ev_loop_fork (EV_A);
2852 }
2853}
2854
2855#if 0
2856static void
2857embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2858{
2859 ev_idle_stop (EV_A_ idle);
2860}
2861#endif
2862
2863void
2864ev_embed_start (EV_P_ ev_embed *w)
2865{
2866 if (expect_false (ev_is_active (w)))
2867 return;
2868
2869 {
2870 struct ev_loop *loop = w->other;
2871 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2872 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2873 }
2874
2875 EV_FREQUENT_CHECK;
2876
2877 ev_set_priority (&w->io, ev_priority (w));
2878 ev_io_start (EV_A_ &w->io);
2879
2880 ev_prepare_init (&w->prepare, embed_prepare_cb);
2881 ev_set_priority (&w->prepare, EV_MINPRI);
2882 ev_prepare_start (EV_A_ &w->prepare);
2883
2884 ev_fork_init (&w->fork, embed_fork_cb);
2885 ev_fork_start (EV_A_ &w->fork);
2886
2887 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2888
2889 ev_start (EV_A_ (W)w, 1);
2890
2891 EV_FREQUENT_CHECK;
2892}
2893
2894void
2895ev_embed_stop (EV_P_ ev_embed *w)
2896{
2897 clear_pending (EV_A_ (W)w);
2898 if (expect_false (!ev_is_active (w)))
2899 return;
2900
2901 EV_FREQUENT_CHECK;
2902
2903 ev_io_stop (EV_A_ &w->io);
2904 ev_prepare_stop (EV_A_ &w->prepare);
2905 ev_fork_stop (EV_A_ &w->fork);
2906
2907 EV_FREQUENT_CHECK;
2908}
2909#endif
2910
2911#if EV_FORK_ENABLE
2912void
2913ev_fork_start (EV_P_ ev_fork *w)
2914{
2915 if (expect_false (ev_is_active (w)))
2916 return;
2917
2918 EV_FREQUENT_CHECK;
2919
2920 ev_start (EV_A_ (W)w, ++forkcnt);
2921 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2922 forks [forkcnt - 1] = w;
2923
2924 EV_FREQUENT_CHECK;
2925}
2926
2927void
2928ev_fork_stop (EV_P_ ev_fork *w)
2929{
2930 clear_pending (EV_A_ (W)w);
2931 if (expect_false (!ev_is_active (w)))
2932 return;
2933
2934 EV_FREQUENT_CHECK;
2935
2936 {
2937 int active = ev_active (w);
2938
2939 forks [active - 1] = forks [--forkcnt];
2940 ev_active (forks [active - 1]) = active;
2941 }
2942
2943 ev_stop (EV_A_ (W)w);
2944
2945 EV_FREQUENT_CHECK;
2946}
2947#endif
2948
2949#if EV_ASYNC_ENABLE
2950void
2951ev_async_start (EV_P_ ev_async *w)
2952{
2953 if (expect_false (ev_is_active (w)))
2954 return;
2955
2956 evpipe_init (EV_A);
2957
2958 EV_FREQUENT_CHECK;
2959
2960 ev_start (EV_A_ (W)w, ++asynccnt);
2961 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2962 asyncs [asynccnt - 1] = w;
2963
2964 EV_FREQUENT_CHECK;
2965}
2966
2967void
2968ev_async_stop (EV_P_ ev_async *w)
2969{
2970 clear_pending (EV_A_ (W)w);
2971 if (expect_false (!ev_is_active (w)))
2972 return;
2973
2974 EV_FREQUENT_CHECK;
2975
2976 {
2977 int active = ev_active (w);
2978
2979 asyncs [active - 1] = asyncs [--asynccnt];
2980 ev_active (asyncs [active - 1]) = active;
2981 }
2982
2983 ev_stop (EV_A_ (W)w);
2984
2985 EV_FREQUENT_CHECK;
2986}
2987
2988void
2989ev_async_send (EV_P_ ev_async *w)
2990{
2991 w->sent = 1;
2992 evpipe_write (EV_A_ &gotasync);
2993}
2994#endif
882 2995
883/*****************************************************************************/ 2996/*****************************************************************************/
884 2997
885struct ev_once 2998struct ev_once
886{ 2999{
887 struct ev_io io; 3000 ev_io io;
888 struct ev_timer to; 3001 ev_timer to;
889 void (*cb)(int revents, void *arg); 3002 void (*cb)(int revents, void *arg);
890 void *arg; 3003 void *arg;
891}; 3004};
892 3005
893static void 3006static void
894once_cb (struct ev_once *once, int revents) 3007once_cb (EV_P_ struct ev_once *once, int revents)
895{ 3008{
896 void (*cb)(int revents, void *arg) = once->cb; 3009 void (*cb)(int revents, void *arg) = once->cb;
897 void *arg = once->arg; 3010 void *arg = once->arg;
898 3011
899 evio_stop (&once->io); 3012 ev_io_stop (EV_A_ &once->io);
900 evtimer_stop (&once->to); 3013 ev_timer_stop (EV_A_ &once->to);
901 free (once); 3014 ev_free (once);
902 3015
903 cb (revents, arg); 3016 cb (revents, arg);
904} 3017}
905 3018
906static void 3019static void
907once_cb_io (struct ev_io *w, int revents) 3020once_cb_io (EV_P_ ev_io *w, int revents)
908{ 3021{
909 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3022 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3023
3024 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
910} 3025}
911 3026
912static void 3027static void
913once_cb_to (struct ev_timer *w, int revents) 3028once_cb_to (EV_P_ ev_timer *w, int revents)
914{ 3029{
915 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3030 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
916}
917 3031
3032 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3033}
3034
918void 3035void
919ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3036ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
920{ 3037{
921 struct ev_once *once = malloc (sizeof (struct ev_once)); 3038 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
922 3039
923 if (!once) 3040 if (expect_false (!once))
924 cb (EV_ERROR, arg); 3041 {
925 else 3042 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
3043 return;
926 { 3044 }
3045
927 once->cb = cb; 3046 once->cb = cb;
928 once->arg = arg; 3047 once->arg = arg;
929 3048
930 evw_init (&once->io, once_cb_io); 3049 ev_init (&once->io, once_cb_io);
931
932 if (fd >= 0) 3050 if (fd >= 0)
933 { 3051 {
934 evio_set (&once->io, fd, events); 3052 ev_io_set (&once->io, fd, events);
935 evio_start (&once->io); 3053 ev_io_start (EV_A_ &once->io);
936 } 3054 }
937 3055
938 evw_init (&once->to, once_cb_to); 3056 ev_init (&once->to, once_cb_to);
939
940 if (timeout >= 0.) 3057 if (timeout >= 0.)
941 { 3058 {
942 evtimer_set (&once->to, timeout, 0.); 3059 ev_timer_set (&once->to, timeout, 0.);
943 evtimer_start (&once->to); 3060 ev_timer_start (EV_A_ &once->to);
944 }
945 }
946}
947
948/*****************************************************************************/
949
950#if 0
951
952struct ev_io wio;
953
954static void
955sin_cb (struct ev_io *w, int revents)
956{
957 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
958}
959
960static void
961ocb (struct ev_timer *w, int revents)
962{
963 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
964 evtimer_stop (w);
965 evtimer_start (w);
966}
967
968static void
969scb (struct ev_signal *w, int revents)
970{
971 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
972 evio_stop (&wio);
973 evio_start (&wio);
974}
975
976static void
977gcb (struct ev_signal *w, int revents)
978{
979 fprintf (stderr, "generic %x\n", revents);
980
981}
982
983int main (void)
984{
985 ev_init (0);
986
987 evio_init (&wio, sin_cb, 0, EV_READ);
988 evio_start (&wio);
989
990 struct ev_timer t[10000];
991
992#if 0
993 int i;
994 for (i = 0; i < 10000; ++i)
995 { 3061 }
996 struct ev_timer *w = t + i;
997 evw_init (w, ocb, i);
998 evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
999 evtimer_start (w);
1000 if (drand48 () < 0.5)
1001 evtimer_stop (w);
1002 }
1003#endif
1004
1005 struct ev_timer t1;
1006 evtimer_init (&t1, ocb, 5, 10);
1007 evtimer_start (&t1);
1008
1009 struct ev_signal sig;
1010 evsignal_init (&sig, scb, SIGQUIT);
1011 evsignal_start (&sig);
1012
1013 struct ev_check cw;
1014 evcheck_init (&cw, gcb);
1015 evcheck_start (&cw);
1016
1017 struct ev_idle iw;
1018 evidle_init (&iw, gcb);
1019 evidle_start (&iw);
1020
1021 ev_loop (0);
1022
1023 return 0;
1024} 3062}
1025 3063
3064#if EV_MULTIPLICITY
3065 #include "ev_wrap.h"
1026#endif 3066#endif
1027 3067
3068#ifdef __cplusplus
3069}
3070#endif
1028 3071
1029
1030

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines