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Comparing libev/ev.c (file contents):
Revision 1.13 by root, Wed Oct 31 10:50:05 2007 UTC vs.
Revision 1.258 by root, Sun Sep 7 18:15:12 2008 UTC

1/*
2 * libev event processing core, watcher management
3 *
4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_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
133
1#include <math.h> 134#include <math.h>
2#include <stdlib.h> 135#include <stdlib.h>
3#include <unistd.h>
4#include <fcntl.h> 136#include <fcntl.h>
5#include <signal.h> 137#include <stddef.h>
6 138
7#include <stdio.h> 139#include <stdio.h>
8 140
9#include <assert.h> 141#include <assert.h>
10#include <errno.h> 142#include <errno.h>
11#include <sys/time.h> 143#include <sys/types.h>
12#include <time.h> 144#include <time.h>
13 145
14#define HAVE_EPOLL 1 146#include <signal.h>
15 147
16#ifndef HAVE_MONOTONIC 148#ifdef EV_H
17# ifdef CLOCK_MONOTONIC 149# include EV_H
18# define HAVE_MONOTONIC 1 150#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
19# endif 164# endif
20#endif 165#endif
21 166
22#ifndef HAVE_SELECT 167/* this block tries to deduce configuration from header-defined symbols and defaults */
23# 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
24#endif 174# endif
175#endif
25 176
26#ifndef HAVE_EPOLL 177#ifndef EV_USE_REALTIME
27# 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
28#endif 186# endif
187#endif
29 188
30#ifndef HAVE_REALTIME 189#ifndef EV_USE_SELECT
31# 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
32#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#endif
293
294#if EV_SELECT_IS_WINSOCKET
295# include <winsock.h>
296#endif
297
298#if EV_USE_EVENTFD
299/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
300# include <stdint.h>
301# ifdef __cplusplus
302extern "C" {
303# endif
304int eventfd (unsigned int initval, int flags);
305# ifdef __cplusplus
306}
307# endif
308#endif
309
310/**/
311
312#if EV_VERIFY >= 3
313# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
314#else
315# define EV_FREQUENT_CHECK do { } while (0)
316#endif
317
318/*
319 * This is used to avoid floating point rounding problems.
320 * It is added to ev_rt_now when scheduling periodics
321 * to ensure progress, time-wise, even when rounding
322 * errors are against us.
323 * This value is good at least till the year 4000.
324 * Better solutions welcome.
325 */
326#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
33 327
34#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 328#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
35#define MAX_BLOCKTIME 60. 329#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
330/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
36 331
37#include "ev.h" 332#if __GNUC__ >= 4
333# define expect(expr,value) __builtin_expect ((expr),(value))
334# define noinline __attribute__ ((noinline))
335#else
336# define expect(expr,value) (expr)
337# define noinline
338# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
339# define inline
340# endif
341#endif
38 342
343#define expect_false(expr) expect ((expr) != 0, 0)
344#define expect_true(expr) expect ((expr) != 0, 1)
345#define inline_size static inline
346
347#if EV_MINIMAL
348# define inline_speed static noinline
349#else
350# define inline_speed static inline
351#endif
352
353#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
354#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
355
356#define EMPTY /* required for microsofts broken pseudo-c compiler */
357#define EMPTY2(a,b) /* used to suppress some warnings */
358
39typedef struct ev_watcher *W; 359typedef ev_watcher *W;
40typedef struct ev_watcher_list *WL; 360typedef ev_watcher_list *WL;
41typedef struct ev_watcher_time *WT; 361typedef ev_watcher_time *WT;
42 362
43static ev_tstamp now, diff; /* monotonic clock */ 363#define ev_active(w) ((W)(w))->active
364#define ev_at(w) ((WT)(w))->at
365
366#if EV_USE_MONOTONIC
367/* sig_atomic_t is used to avoid per-thread variables or locking but still */
368/* giving it a reasonably high chance of working on typical architetcures */
369static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
370#endif
371
372#ifdef _WIN32
373# include "ev_win32.c"
374#endif
375
376/*****************************************************************************/
377
378static void (*syserr_cb)(const char *msg);
379
380void
381ev_set_syserr_cb (void (*cb)(const char *msg))
382{
383 syserr_cb = cb;
384}
385
386static void noinline
387syserr (const char *msg)
388{
389 if (!msg)
390 msg = "(libev) system error";
391
392 if (syserr_cb)
393 syserr_cb (msg);
394 else
395 {
396 perror (msg);
397 abort ();
398 }
399}
400
401static void *
402ev_realloc_emul (void *ptr, long size)
403{
404 /* some systems, notably openbsd and darwin, fail to properly
405 * implement realloc (x, 0) (as required by both ansi c-98 and
406 * the single unix specification, so work around them here.
407 */
408
409 if (size)
410 return realloc (ptr, size);
411
412 free (ptr);
413 return 0;
414}
415
416static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
417
418void
419ev_set_allocator (void *(*cb)(void *ptr, long size))
420{
421 alloc = cb;
422}
423
424inline_speed void *
425ev_realloc (void *ptr, long size)
426{
427 ptr = alloc (ptr, size);
428
429 if (!ptr && size)
430 {
431 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
432 abort ();
433 }
434
435 return ptr;
436}
437
438#define ev_malloc(size) ev_realloc (0, (size))
439#define ev_free(ptr) ev_realloc ((ptr), 0)
440
441/*****************************************************************************/
442
443typedef struct
444{
445 WL head;
446 unsigned char events;
447 unsigned char reify;
448#if EV_SELECT_IS_WINSOCKET
449 SOCKET handle;
450#endif
451} ANFD;
452
453typedef struct
454{
455 W w;
456 int events;
457} ANPENDING;
458
459#if EV_USE_INOTIFY
460/* hash table entry per inotify-id */
461typedef struct
462{
463 WL head;
464} ANFS;
465#endif
466
467/* Heap Entry */
468#if EV_HEAP_CACHE_AT
469 typedef struct {
470 ev_tstamp at;
471 WT w;
472 } ANHE;
473
474 #define ANHE_w(he) (he).w /* access watcher, read-write */
475 #define ANHE_at(he) (he).at /* access cached at, read-only */
476 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
477#else
478 typedef WT ANHE;
479
480 #define ANHE_w(he) (he)
481 #define ANHE_at(he) (he)->at
482 #define ANHE_at_cache(he)
483#endif
484
485#if EV_MULTIPLICITY
486
487 struct ev_loop
488 {
489 ev_tstamp ev_rt_now;
490 #define ev_rt_now ((loop)->ev_rt_now)
491 #define VAR(name,decl) decl;
492 #include "ev_vars.h"
493 #undef VAR
494 };
495 #include "ev_wrap.h"
496
497 static struct ev_loop default_loop_struct;
498 struct ev_loop *ev_default_loop_ptr;
499
500#else
501
44ev_tstamp ev_now; 502 ev_tstamp ev_rt_now;
45int ev_method; 503 #define VAR(name,decl) static decl;
504 #include "ev_vars.h"
505 #undef VAR
46 506
47static int have_monotonic; /* runtime */ 507 static int ev_default_loop_ptr;
48 508
49static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 509#endif
50static void (*method_modify)(int fd, int oev, int nev);
51static void (*method_poll)(ev_tstamp timeout);
52 510
53/*****************************************************************************/ 511/*****************************************************************************/
54 512
55ev_tstamp 513ev_tstamp
56ev_time (void) 514ev_time (void)
57{ 515{
58#if HAVE_REALTIME 516#if EV_USE_REALTIME
59 struct timespec ts; 517 struct timespec ts;
60 clock_gettime (CLOCK_REALTIME, &ts); 518 clock_gettime (CLOCK_REALTIME, &ts);
61 return ts.tv_sec + ts.tv_nsec * 1e-9; 519 return ts.tv_sec + ts.tv_nsec * 1e-9;
62#else 520#else
63 struct timeval tv; 521 struct timeval tv;
64 gettimeofday (&tv, 0); 522 gettimeofday (&tv, 0);
65 return tv.tv_sec + tv.tv_usec * 1e-6; 523 return tv.tv_sec + tv.tv_usec * 1e-6;
66#endif 524#endif
67} 525}
68 526
69static ev_tstamp 527ev_tstamp inline_size
70get_clock (void) 528get_clock (void)
71{ 529{
72#if HAVE_MONOTONIC 530#if EV_USE_MONOTONIC
73 if (have_monotonic) 531 if (expect_true (have_monotonic))
74 { 532 {
75 struct timespec ts; 533 struct timespec ts;
76 clock_gettime (CLOCK_MONOTONIC, &ts); 534 clock_gettime (CLOCK_MONOTONIC, &ts);
77 return ts.tv_sec + ts.tv_nsec * 1e-9; 535 return ts.tv_sec + ts.tv_nsec * 1e-9;
78 } 536 }
79#endif 537#endif
80 538
81 return ev_time (); 539 return ev_time ();
82} 540}
83 541
84#define array_needsize(base,cur,cnt,init) \ 542#if EV_MULTIPLICITY
85 if ((cnt) > cur) \ 543ev_tstamp
86 { \ 544ev_now (EV_P)
87 int newcnt = cur ? cur << 1 : 16; \ 545{
88 fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\ 546 return ev_rt_now;
89 base = realloc (base, sizeof (*base) * (newcnt)); \ 547}
90 init (base + cur, newcnt - cur); \ 548#endif
91 cur = newcnt; \ 549
550void
551ev_sleep (ev_tstamp delay)
552{
553 if (delay > 0.)
92 } 554 {
555#if EV_USE_NANOSLEEP
556 struct timespec ts;
557
558 ts.tv_sec = (time_t)delay;
559 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
560
561 nanosleep (&ts, 0);
562#elif defined(_WIN32)
563 Sleep ((unsigned long)(delay * 1e3));
564#else
565 struct timeval tv;
566
567 tv.tv_sec = (time_t)delay;
568 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
569
570 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
571 /* somehting nto guaranteed by newer posix versions, but guaranteed */
572 /* by older ones */
573 select (0, 0, 0, 0, &tv);
574#endif
575 }
576}
93 577
94/*****************************************************************************/ 578/*****************************************************************************/
95 579
580#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
581
582int inline_size
583array_nextsize (int elem, int cur, int cnt)
584{
585 int ncur = cur + 1;
586
587 do
588 ncur <<= 1;
589 while (cnt > ncur);
590
591 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
592 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
593 {
594 ncur *= elem;
595 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
596 ncur = ncur - sizeof (void *) * 4;
597 ncur /= elem;
598 }
599
600 return ncur;
601}
602
603static noinline void *
604array_realloc (int elem, void *base, int *cur, int cnt)
605{
606 *cur = array_nextsize (elem, *cur, cnt);
607 return ev_realloc (base, elem * *cur);
608}
609
610#define array_needsize(type,base,cur,cnt,init) \
611 if (expect_false ((cnt) > (cur))) \
612 { \
613 int ocur_ = (cur); \
614 (base) = (type *)array_realloc \
615 (sizeof (type), (base), &(cur), (cnt)); \
616 init ((base) + (ocur_), (cur) - ocur_); \
617 }
618
619#if 0
620#define array_slim(type,stem) \
621 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
622 { \
623 stem ## max = array_roundsize (stem ## cnt >> 1); \
624 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
625 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
626 }
627#endif
628
629#define array_free(stem, idx) \
630 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
631
632/*****************************************************************************/
633
634void noinline
635ev_feed_event (EV_P_ void *w, int revents)
636{
637 W w_ = (W)w;
638 int pri = ABSPRI (w_);
639
640 if (expect_false (w_->pending))
641 pendings [pri][w_->pending - 1].events |= revents;
642 else
643 {
644 w_->pending = ++pendingcnt [pri];
645 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
646 pendings [pri][w_->pending - 1].w = w_;
647 pendings [pri][w_->pending - 1].events = revents;
648 }
649}
650
651void inline_speed
652queue_events (EV_P_ W *events, int eventcnt, int type)
653{
654 int i;
655
656 for (i = 0; i < eventcnt; ++i)
657 ev_feed_event (EV_A_ events [i], type);
658}
659
660/*****************************************************************************/
661
662void inline_size
663anfds_init (ANFD *base, int count)
664{
665 while (count--)
666 {
667 base->head = 0;
668 base->events = EV_NONE;
669 base->reify = 0;
670
671 ++base;
672 }
673}
674
675void inline_speed
676fd_event (EV_P_ int fd, int revents)
677{
678 ANFD *anfd = anfds + fd;
679 ev_io *w;
680
681 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
682 {
683 int ev = w->events & revents;
684
685 if (ev)
686 ev_feed_event (EV_A_ (W)w, ev);
687 }
688}
689
690void
691ev_feed_fd_event (EV_P_ int fd, int revents)
692{
693 if (fd >= 0 && fd < anfdmax)
694 fd_event (EV_A_ fd, revents);
695}
696
697void inline_size
698fd_reify (EV_P)
699{
700 int i;
701
702 for (i = 0; i < fdchangecnt; ++i)
703 {
704 int fd = fdchanges [i];
705 ANFD *anfd = anfds + fd;
706 ev_io *w;
707
708 unsigned char events = 0;
709
710 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
711 events |= (unsigned char)w->events;
712
713#if EV_SELECT_IS_WINSOCKET
714 if (events)
715 {
716 unsigned long arg;
717 #ifdef EV_FD_TO_WIN32_HANDLE
718 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
719 #else
720 anfd->handle = _get_osfhandle (fd);
721 #endif
722 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
723 }
724#endif
725
726 {
727 unsigned char o_events = anfd->events;
728 unsigned char o_reify = anfd->reify;
729
730 anfd->reify = 0;
731 anfd->events = events;
732
733 if (o_events != events || o_reify & EV_IOFDSET)
734 backend_modify (EV_A_ fd, o_events, events);
735 }
736 }
737
738 fdchangecnt = 0;
739}
740
741void inline_size
742fd_change (EV_P_ int fd, int flags)
743{
744 unsigned char reify = anfds [fd].reify;
745 anfds [fd].reify |= flags;
746
747 if (expect_true (!reify))
748 {
749 ++fdchangecnt;
750 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
751 fdchanges [fdchangecnt - 1] = fd;
752 }
753}
754
755void inline_speed
756fd_kill (EV_P_ int fd)
757{
758 ev_io *w;
759
760 while ((w = (ev_io *)anfds [fd].head))
761 {
762 ev_io_stop (EV_A_ w);
763 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
764 }
765}
766
767int inline_size
768fd_valid (int fd)
769{
770#ifdef _WIN32
771 return _get_osfhandle (fd) != -1;
772#else
773 return fcntl (fd, F_GETFD) != -1;
774#endif
775}
776
777/* called on EBADF to verify fds */
778static void noinline
779fd_ebadf (EV_P)
780{
781 int fd;
782
783 for (fd = 0; fd < anfdmax; ++fd)
784 if (anfds [fd].events)
785 if (!fd_valid (fd) && errno == EBADF)
786 fd_kill (EV_A_ fd);
787}
788
789/* called on ENOMEM in select/poll to kill some fds and retry */
790static void noinline
791fd_enomem (EV_P)
792{
793 int fd;
794
795 for (fd = anfdmax; fd--; )
796 if (anfds [fd].events)
797 {
798 fd_kill (EV_A_ fd);
799 return;
800 }
801}
802
803/* usually called after fork if backend needs to re-arm all fds from scratch */
804static void noinline
805fd_rearm_all (EV_P)
806{
807 int fd;
808
809 for (fd = 0; fd < anfdmax; ++fd)
810 if (anfds [fd].events)
811 {
812 anfds [fd].events = 0;
813 fd_change (EV_A_ fd, EV_IOFDSET | 1);
814 }
815}
816
817/*****************************************************************************/
818
819/*
820 * the heap functions want a real array index. array index 0 uis guaranteed to not
821 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
822 * the branching factor of the d-tree.
823 */
824
825/*
826 * at the moment we allow libev the luxury of two heaps,
827 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
828 * which is more cache-efficient.
829 * the difference is about 5% with 50000+ watchers.
830 */
831#if EV_USE_4HEAP
832
833#define DHEAP 4
834#define HEAP0 (DHEAP - 1) /* index of first element in heap */
835#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
836#define UPHEAP_DONE(p,k) ((p) == (k))
837
838/* away from the root */
839void inline_speed
840downheap (ANHE *heap, int N, int k)
841{
842 ANHE he = heap [k];
843 ANHE *E = heap + N + HEAP0;
844
845 for (;;)
846 {
847 ev_tstamp minat;
848 ANHE *minpos;
849 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
850
851 /* find minimum child */
852 if (expect_true (pos + DHEAP - 1 < E))
853 {
854 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
855 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
856 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
857 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
858 }
859 else if (pos < E)
860 {
861 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
862 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
863 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
864 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
865 }
866 else
867 break;
868
869 if (ANHE_at (he) <= minat)
870 break;
871
872 heap [k] = *minpos;
873 ev_active (ANHE_w (*minpos)) = k;
874
875 k = minpos - heap;
876 }
877
878 heap [k] = he;
879 ev_active (ANHE_w (he)) = k;
880}
881
882#else /* 4HEAP */
883
884#define HEAP0 1
885#define HPARENT(k) ((k) >> 1)
886#define UPHEAP_DONE(p,k) (!(p))
887
888/* away from the root */
889void inline_speed
890downheap (ANHE *heap, int N, int k)
891{
892 ANHE he = heap [k];
893
894 for (;;)
895 {
896 int c = k << 1;
897
898 if (c > N + HEAP0 - 1)
899 break;
900
901 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
902 ? 1 : 0;
903
904 if (ANHE_at (he) <= ANHE_at (heap [c]))
905 break;
906
907 heap [k] = heap [c];
908 ev_active (ANHE_w (heap [k])) = k;
909
910 k = c;
911 }
912
913 heap [k] = he;
914 ev_active (ANHE_w (he)) = k;
915}
916#endif
917
918/* towards the root */
919void inline_speed
920upheap (ANHE *heap, int k)
921{
922 ANHE he = heap [k];
923
924 for (;;)
925 {
926 int p = HPARENT (k);
927
928 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
929 break;
930
931 heap [k] = heap [p];
932 ev_active (ANHE_w (heap [k])) = k;
933 k = p;
934 }
935
936 heap [k] = he;
937 ev_active (ANHE_w (he)) = k;
938}
939
940void inline_size
941adjustheap (ANHE *heap, int N, int k)
942{
943 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
944 upheap (heap, k);
945 else
946 downheap (heap, N, k);
947}
948
949/* rebuild the heap: this function is used only once and executed rarely */
950void inline_size
951reheap (ANHE *heap, int N)
952{
953 int i;
954
955 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
956 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
957 for (i = 0; i < N; ++i)
958 upheap (heap, i + HEAP0);
959}
960
961/*****************************************************************************/
962
96typedef struct 963typedef struct
97{ 964{
98 struct ev_io *head; 965 WL head;
99 unsigned char wev, rev; /* want, received event set */ 966 EV_ATOMIC_T gotsig;
100} ANFD;
101
102static ANFD *anfds;
103static int anfdmax;
104
105static int *fdchanges;
106static int fdchangemax, fdchangecnt;
107
108static void
109anfds_init (ANFD *base, int count)
110{
111 while (count--)
112 {
113 base->head = 0;
114 base->wev = base->rev = EV_NONE;
115 ++base;
116 }
117}
118
119typedef struct
120{
121 W w;
122 int events;
123} ANPENDING;
124
125static ANPENDING *pendings;
126static int pendingmax, pendingcnt;
127
128static void
129event (W w, int events)
130{
131 w->pending = ++pendingcnt;
132 array_needsize (pendings, pendingmax, pendingcnt, );
133 pendings [pendingcnt - 1].w = w;
134 pendings [pendingcnt - 1].events = events;
135}
136
137static void
138fd_event (int fd, int events)
139{
140 ANFD *anfd = anfds + fd;
141 struct ev_io *w;
142
143 for (w = anfd->head; w; w = w->next)
144 {
145 int ev = w->events & events;
146
147 if (ev)
148 event ((W)w, ev);
149 }
150}
151
152static void
153queue_events (W *events, int eventcnt, int type)
154{
155 int i;
156
157 for (i = 0; i < eventcnt; ++i)
158 event (events [i], type);
159}
160
161/*****************************************************************************/
162
163static struct ev_timer **timers;
164static int timermax, timercnt;
165
166static struct ev_periodic **periodics;
167static int periodicmax, periodiccnt;
168
169static void
170upheap (WT *timers, int k)
171{
172 WT w = timers [k];
173
174 while (k && timers [k >> 1]->at > w->at)
175 {
176 timers [k] = timers [k >> 1];
177 timers [k]->active = k + 1;
178 k >>= 1;
179 }
180
181 timers [k] = w;
182 timers [k]->active = k + 1;
183
184}
185
186static void
187downheap (WT *timers, int N, int k)
188{
189 WT w = timers [k];
190
191 while (k < (N >> 1))
192 {
193 int j = k << 1;
194
195 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
196 ++j;
197
198 if (w->at <= timers [j]->at)
199 break;
200
201 timers [k] = timers [j];
202 timers [k]->active = k + 1;
203 k = j;
204 }
205
206 timers [k] = w;
207 timers [k]->active = k + 1;
208}
209
210/*****************************************************************************/
211
212typedef struct
213{
214 struct ev_signal *head;
215 sig_atomic_t gotsig;
216} ANSIG; 967} ANSIG;
217 968
218static ANSIG *signals; 969static ANSIG *signals;
219static int signalmax; 970static int signalmax;
220 971
221static int sigpipe [2]; 972static EV_ATOMIC_T gotsig;
222static sig_atomic_t gotsig;
223static struct ev_io sigev;
224 973
225static void 974void inline_size
226signals_init (ANSIG *base, int count) 975signals_init (ANSIG *base, int count)
227{ 976{
228 while (count--) 977 while (count--)
229 { 978 {
230 base->head = 0; 979 base->head = 0;
231 base->gotsig = 0; 980 base->gotsig = 0;
981
232 ++base; 982 ++base;
233 } 983 }
234} 984}
235 985
986/*****************************************************************************/
987
988void inline_speed
989fd_intern (int fd)
990{
991#ifdef _WIN32
992 unsigned long arg = 1;
993 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
994#else
995 fcntl (fd, F_SETFD, FD_CLOEXEC);
996 fcntl (fd, F_SETFL, O_NONBLOCK);
997#endif
998}
999
1000static void noinline
1001evpipe_init (EV_P)
1002{
1003 if (!ev_is_active (&pipeev))
1004 {
1005#if EV_USE_EVENTFD
1006 if ((evfd = eventfd (0, 0)) >= 0)
1007 {
1008 evpipe [0] = -1;
1009 fd_intern (evfd);
1010 ev_io_set (&pipeev, evfd, EV_READ);
1011 }
1012 else
1013#endif
1014 {
1015 while (pipe (evpipe))
1016 syserr ("(libev) error creating signal/async pipe");
1017
1018 fd_intern (evpipe [0]);
1019 fd_intern (evpipe [1]);
1020 ev_io_set (&pipeev, evpipe [0], EV_READ);
1021 }
1022
1023 ev_io_start (EV_A_ &pipeev);
1024 ev_unref (EV_A); /* watcher should not keep loop alive */
1025 }
1026}
1027
1028void inline_size
1029evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1030{
1031 if (!*flag)
1032 {
1033 int old_errno = errno; /* save errno because write might clobber it */
1034
1035 *flag = 1;
1036
1037#if EV_USE_EVENTFD
1038 if (evfd >= 0)
1039 {
1040 uint64_t counter = 1;
1041 write (evfd, &counter, sizeof (uint64_t));
1042 }
1043 else
1044#endif
1045 write (evpipe [1], &old_errno, 1);
1046
1047 errno = old_errno;
1048 }
1049}
1050
236static void 1051static void
1052pipecb (EV_P_ ev_io *iow, int revents)
1053{
1054#if EV_USE_EVENTFD
1055 if (evfd >= 0)
1056 {
1057 uint64_t counter;
1058 read (evfd, &counter, sizeof (uint64_t));
1059 }
1060 else
1061#endif
1062 {
1063 char dummy;
1064 read (evpipe [0], &dummy, 1);
1065 }
1066
1067 if (gotsig && ev_is_default_loop (EV_A))
1068 {
1069 int signum;
1070 gotsig = 0;
1071
1072 for (signum = signalmax; signum--; )
1073 if (signals [signum].gotsig)
1074 ev_feed_signal_event (EV_A_ signum + 1);
1075 }
1076
1077#if EV_ASYNC_ENABLE
1078 if (gotasync)
1079 {
1080 int i;
1081 gotasync = 0;
1082
1083 for (i = asynccnt; i--; )
1084 if (asyncs [i]->sent)
1085 {
1086 asyncs [i]->sent = 0;
1087 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1088 }
1089 }
1090#endif
1091}
1092
1093/*****************************************************************************/
1094
1095static void
237sighandler (int signum) 1096ev_sighandler (int signum)
238{ 1097{
1098#if EV_MULTIPLICITY
1099 struct ev_loop *loop = &default_loop_struct;
1100#endif
1101
1102#if _WIN32
1103 signal (signum, ev_sighandler);
1104#endif
1105
239 signals [signum - 1].gotsig = 1; 1106 signals [signum - 1].gotsig = 1;
1107 evpipe_write (EV_A_ &gotsig);
1108}
240 1109
241 if (!gotsig) 1110void noinline
1111ev_feed_signal_event (EV_P_ int signum)
1112{
1113 WL w;
1114
1115#if EV_MULTIPLICITY
1116 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1117#endif
1118
1119 --signum;
1120
1121 if (signum < 0 || signum >= signalmax)
1122 return;
1123
1124 signals [signum].gotsig = 0;
1125
1126 for (w = signals [signum].head; w; w = w->next)
1127 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1128}
1129
1130/*****************************************************************************/
1131
1132static WL childs [EV_PID_HASHSIZE];
1133
1134#ifndef _WIN32
1135
1136static ev_signal childev;
1137
1138#ifndef WIFCONTINUED
1139# define WIFCONTINUED(status) 0
1140#endif
1141
1142void inline_speed
1143child_reap (EV_P_ int chain, int pid, int status)
1144{
1145 ev_child *w;
1146 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1147
1148 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1149 {
1150 if ((w->pid == pid || !w->pid)
1151 && (!traced || (w->flags & 1)))
1152 {
1153 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1154 w->rpid = pid;
1155 w->rstatus = status;
1156 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1157 }
1158 }
1159}
1160
1161#ifndef WCONTINUED
1162# define WCONTINUED 0
1163#endif
1164
1165static void
1166childcb (EV_P_ ev_signal *sw, int revents)
1167{
1168 int pid, status;
1169
1170 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1171 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1172 if (!WCONTINUED
1173 || errno != EINVAL
1174 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1175 return;
1176
1177 /* make sure we are called again until all children have been reaped */
1178 /* we need to do it this way so that the callback gets called before we continue */
1179 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1180
1181 child_reap (EV_A_ pid, pid, status);
1182 if (EV_PID_HASHSIZE > 1)
1183 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1184}
1185
1186#endif
1187
1188/*****************************************************************************/
1189
1190#if EV_USE_PORT
1191# include "ev_port.c"
1192#endif
1193#if EV_USE_KQUEUE
1194# include "ev_kqueue.c"
1195#endif
1196#if EV_USE_EPOLL
1197# include "ev_epoll.c"
1198#endif
1199#if EV_USE_POLL
1200# include "ev_poll.c"
1201#endif
1202#if EV_USE_SELECT
1203# include "ev_select.c"
1204#endif
1205
1206int
1207ev_version_major (void)
1208{
1209 return EV_VERSION_MAJOR;
1210}
1211
1212int
1213ev_version_minor (void)
1214{
1215 return EV_VERSION_MINOR;
1216}
1217
1218/* return true if we are running with elevated privileges and should ignore env variables */
1219int inline_size
1220enable_secure (void)
1221{
1222#ifdef _WIN32
1223 return 0;
1224#else
1225 return getuid () != geteuid ()
1226 || getgid () != getegid ();
1227#endif
1228}
1229
1230unsigned int
1231ev_supported_backends (void)
1232{
1233 unsigned int flags = 0;
1234
1235 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1236 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1237 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1238 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1239 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1240
1241 return flags;
1242}
1243
1244unsigned int
1245ev_recommended_backends (void)
1246{
1247 unsigned int flags = ev_supported_backends ();
1248
1249#ifndef __NetBSD__
1250 /* kqueue is borked on everything but netbsd apparently */
1251 /* it usually doesn't work correctly on anything but sockets and pipes */
1252 flags &= ~EVBACKEND_KQUEUE;
1253#endif
1254#ifdef __APPLE__
1255 // flags &= ~EVBACKEND_KQUEUE; for documentation
1256 flags &= ~EVBACKEND_POLL;
1257#endif
1258
1259 return flags;
1260}
1261
1262unsigned int
1263ev_embeddable_backends (void)
1264{
1265 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1266
1267 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1268 /* please fix it and tell me how to detect the fix */
1269 flags &= ~EVBACKEND_EPOLL;
1270
1271 return flags;
1272}
1273
1274unsigned int
1275ev_backend (EV_P)
1276{
1277 return backend;
1278}
1279
1280unsigned int
1281ev_loop_count (EV_P)
1282{
1283 return loop_count;
1284}
1285
1286void
1287ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1288{
1289 io_blocktime = interval;
1290}
1291
1292void
1293ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1294{
1295 timeout_blocktime = interval;
1296}
1297
1298static void noinline
1299loop_init (EV_P_ unsigned int flags)
1300{
1301 if (!backend)
1302 {
1303#if EV_USE_MONOTONIC
242 { 1304 {
1305 struct timespec ts;
1306 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1307 have_monotonic = 1;
1308 }
1309#endif
1310
1311 ev_rt_now = ev_time ();
1312 mn_now = get_clock ();
1313 now_floor = mn_now;
1314 rtmn_diff = ev_rt_now - mn_now;
1315
1316 io_blocktime = 0.;
1317 timeout_blocktime = 0.;
1318 backend = 0;
1319 backend_fd = -1;
1320 gotasync = 0;
1321#if EV_USE_INOTIFY
1322 fs_fd = -2;
1323#endif
1324
1325 /* pid check not overridable via env */
1326#ifndef _WIN32
1327 if (flags & EVFLAG_FORKCHECK)
1328 curpid = getpid ();
1329#endif
1330
1331 if (!(flags & EVFLAG_NOENV)
1332 && !enable_secure ()
1333 && getenv ("LIBEV_FLAGS"))
1334 flags = atoi (getenv ("LIBEV_FLAGS"));
1335
1336 if (!(flags & 0x0000ffffU))
1337 flags |= ev_recommended_backends ();
1338
1339#if EV_USE_PORT
1340 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1341#endif
1342#if EV_USE_KQUEUE
1343 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1344#endif
1345#if EV_USE_EPOLL
1346 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1347#endif
1348#if EV_USE_POLL
1349 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1350#endif
1351#if EV_USE_SELECT
1352 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1353#endif
1354
1355 ev_init (&pipeev, pipecb);
1356 ev_set_priority (&pipeev, EV_MAXPRI);
1357 }
1358}
1359
1360static void noinline
1361loop_destroy (EV_P)
1362{
1363 int i;
1364
1365 if (ev_is_active (&pipeev))
1366 {
1367 ev_ref (EV_A); /* signal watcher */
1368 ev_io_stop (EV_A_ &pipeev);
1369
1370#if EV_USE_EVENTFD
1371 if (evfd >= 0)
1372 close (evfd);
1373#endif
1374
1375 if (evpipe [0] >= 0)
1376 {
1377 close (evpipe [0]);
1378 close (evpipe [1]);
1379 }
1380 }
1381
1382#if EV_USE_INOTIFY
1383 if (fs_fd >= 0)
1384 close (fs_fd);
1385#endif
1386
1387 if (backend_fd >= 0)
1388 close (backend_fd);
1389
1390#if EV_USE_PORT
1391 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1392#endif
1393#if EV_USE_KQUEUE
1394 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1395#endif
1396#if EV_USE_EPOLL
1397 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1398#endif
1399#if EV_USE_POLL
1400 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1401#endif
1402#if EV_USE_SELECT
1403 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1404#endif
1405
1406 for (i = NUMPRI; i--; )
1407 {
1408 array_free (pending, [i]);
1409#if EV_IDLE_ENABLE
1410 array_free (idle, [i]);
1411#endif
1412 }
1413
1414 ev_free (anfds); anfdmax = 0;
1415
1416 /* have to use the microsoft-never-gets-it-right macro */
1417 array_free (fdchange, EMPTY);
1418 array_free (timer, EMPTY);
1419#if EV_PERIODIC_ENABLE
1420 array_free (periodic, EMPTY);
1421#endif
1422#if EV_FORK_ENABLE
1423 array_free (fork, EMPTY);
1424#endif
1425 array_free (prepare, EMPTY);
1426 array_free (check, EMPTY);
1427#if EV_ASYNC_ENABLE
1428 array_free (async, EMPTY);
1429#endif
1430
1431 backend = 0;
1432}
1433
1434#if EV_USE_INOTIFY
1435void inline_size infy_fork (EV_P);
1436#endif
1437
1438void inline_size
1439loop_fork (EV_P)
1440{
1441#if EV_USE_PORT
1442 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1443#endif
1444#if EV_USE_KQUEUE
1445 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1446#endif
1447#if EV_USE_EPOLL
1448 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1449#endif
1450#if EV_USE_INOTIFY
1451 infy_fork (EV_A);
1452#endif
1453
1454 if (ev_is_active (&pipeev))
1455 {
1456 /* this "locks" the handlers against writing to the pipe */
1457 /* while we modify the fd vars */
243 gotsig = 1; 1458 gotsig = 1;
244 write (sigpipe [1], &gotsig, 1); 1459#if EV_ASYNC_ENABLE
245 } 1460 gotasync = 1;
246} 1461#endif
247 1462
248static void 1463 ev_ref (EV_A);
249sigcb (struct ev_io *iow, int revents) 1464 ev_io_stop (EV_A_ &pipeev);
1465
1466#if EV_USE_EVENTFD
1467 if (evfd >= 0)
1468 close (evfd);
1469#endif
1470
1471 if (evpipe [0] >= 0)
1472 {
1473 close (evpipe [0]);
1474 close (evpipe [1]);
1475 }
1476
1477 evpipe_init (EV_A);
1478 /* now iterate over everything, in case we missed something */
1479 pipecb (EV_A_ &pipeev, EV_READ);
1480 }
1481
1482 postfork = 0;
1483}
1484
1485#if EV_MULTIPLICITY
1486
1487struct ev_loop *
1488ev_loop_new (unsigned int flags)
250{ 1489{
251 struct ev_signal *w; 1490 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1491
1492 memset (loop, 0, sizeof (struct ev_loop));
1493
1494 loop_init (EV_A_ flags);
1495
1496 if (ev_backend (EV_A))
1497 return loop;
1498
1499 return 0;
1500}
1501
1502void
1503ev_loop_destroy (EV_P)
1504{
1505 loop_destroy (EV_A);
1506 ev_free (loop);
1507}
1508
1509void
1510ev_loop_fork (EV_P)
1511{
1512 postfork = 1; /* must be in line with ev_default_fork */
1513}
1514
1515#if EV_VERIFY
1516static void noinline
1517verify_watcher (EV_P_ W w)
1518{
1519 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1520
1521 if (w->pending)
1522 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1523}
1524
1525static void noinline
1526verify_heap (EV_P_ ANHE *heap, int N)
1527{
252 int sig; 1528 int i;
253 1529
254 gotsig = 0; 1530 for (i = HEAP0; i < N + HEAP0; ++i)
255 read (sigpipe [0], &revents, 1); 1531 {
1532 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1533 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1534 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
256 1535
257 for (sig = signalmax; sig--; ) 1536 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
258 if (signals [sig].gotsig) 1537 }
1538}
1539
1540static void noinline
1541array_verify (EV_P_ W *ws, int cnt)
1542{
1543 while (cnt--)
1544 {
1545 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1546 verify_watcher (EV_A_ ws [cnt]);
1547 }
1548}
1549#endif
1550
1551void
1552ev_loop_verify (EV_P)
1553{
1554#if EV_VERIFY
1555 int i;
1556 WL w;
1557
1558 assert (activecnt >= -1);
1559
1560 assert (fdchangemax >= fdchangecnt);
1561 for (i = 0; i < fdchangecnt; ++i)
1562 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1563
1564 assert (anfdmax >= 0);
1565 for (i = 0; i < anfdmax; ++i)
1566 for (w = anfds [i].head; w; w = w->next)
259 { 1567 {
260 signals [sig].gotsig = 0; 1568 verify_watcher (EV_A_ (W)w);
261 1569 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
262 for (w = signals [sig].head; w; w = w->next) 1570 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
263 event ((W)w, EV_SIGNAL);
264 } 1571 }
265}
266 1572
267static void 1573 assert (timermax >= timercnt);
268siginit (void) 1574 verify_heap (EV_A_ timers, timercnt);
269{
270 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
271 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
272 1575
273 /* rather than sort out wether we really need nb, set it */ 1576#if EV_PERIODIC_ENABLE
274 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); 1577 assert (periodicmax >= periodiccnt);
275 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); 1578 verify_heap (EV_A_ periodics, periodiccnt);
1579#endif
276 1580
277 evio_set (&sigev, sigpipe [0], EV_READ); 1581 for (i = NUMPRI; i--; )
278 evio_start (&sigev); 1582 {
1583 assert (pendingmax [i] >= pendingcnt [i]);
1584#if EV_IDLE_ENABLE
1585 assert (idleall >= 0);
1586 assert (idlemax [i] >= idlecnt [i]);
1587 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1588#endif
1589 }
1590
1591#if EV_FORK_ENABLE
1592 assert (forkmax >= forkcnt);
1593 array_verify (EV_A_ (W *)forks, forkcnt);
1594#endif
1595
1596#if EV_ASYNC_ENABLE
1597 assert (asyncmax >= asynccnt);
1598 array_verify (EV_A_ (W *)asyncs, asynccnt);
1599#endif
1600
1601 assert (preparemax >= preparecnt);
1602 array_verify (EV_A_ (W *)prepares, preparecnt);
1603
1604 assert (checkmax >= checkcnt);
1605 array_verify (EV_A_ (W *)checks, checkcnt);
1606
1607# if 0
1608 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1609 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1610# endif
1611#endif
1612}
1613
1614#endif /* multiplicity */
1615
1616#if EV_MULTIPLICITY
1617struct ev_loop *
1618ev_default_loop_init (unsigned int flags)
1619#else
1620int
1621ev_default_loop (unsigned int flags)
1622#endif
1623{
1624 if (!ev_default_loop_ptr)
1625 {
1626#if EV_MULTIPLICITY
1627 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1628#else
1629 ev_default_loop_ptr = 1;
1630#endif
1631
1632 loop_init (EV_A_ flags);
1633
1634 if (ev_backend (EV_A))
1635 {
1636#ifndef _WIN32
1637 ev_signal_init (&childev, childcb, SIGCHLD);
1638 ev_set_priority (&childev, EV_MAXPRI);
1639 ev_signal_start (EV_A_ &childev);
1640 ev_unref (EV_A); /* child watcher should not keep loop alive */
1641#endif
1642 }
1643 else
1644 ev_default_loop_ptr = 0;
1645 }
1646
1647 return ev_default_loop_ptr;
1648}
1649
1650void
1651ev_default_destroy (void)
1652{
1653#if EV_MULTIPLICITY
1654 struct ev_loop *loop = ev_default_loop_ptr;
1655#endif
1656
1657#ifndef _WIN32
1658 ev_ref (EV_A); /* child watcher */
1659 ev_signal_stop (EV_A_ &childev);
1660#endif
1661
1662 loop_destroy (EV_A);
1663}
1664
1665void
1666ev_default_fork (void)
1667{
1668#if EV_MULTIPLICITY
1669 struct ev_loop *loop = ev_default_loop_ptr;
1670#endif
1671
1672 if (backend)
1673 postfork = 1; /* must be in line with ev_loop_fork */
279} 1674}
280 1675
281/*****************************************************************************/ 1676/*****************************************************************************/
282 1677
283static struct ev_idle **idles; 1678void
284static int idlemax, idlecnt; 1679ev_invoke (EV_P_ void *w, int revents)
285
286static struct ev_check **checks;
287static int checkmax, checkcnt;
288
289/*****************************************************************************/
290
291#if HAVE_EPOLL
292# include "ev_epoll.c"
293#endif
294#if HAVE_SELECT
295# include "ev_select.c"
296#endif
297
298int ev_init (int flags)
299{ 1680{
300#if HAVE_MONOTONIC 1681 EV_CB_INVOKE ((W)w, revents);
301 {
302 struct timespec ts;
303 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
304 have_monotonic = 1;
305 }
306#endif
307
308 ev_now = ev_time ();
309 now = get_clock ();
310 diff = ev_now - now;
311
312 if (pipe (sigpipe))
313 return 0;
314
315 ev_method = EVMETHOD_NONE;
316#if HAVE_EPOLL
317 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
318#endif
319#if HAVE_SELECT
320 if (ev_method == EVMETHOD_NONE) select_init (flags);
321#endif
322
323 if (ev_method)
324 {
325 evw_init (&sigev, sigcb);
326 siginit ();
327 }
328
329 return ev_method;
330} 1682}
331 1683
332/*****************************************************************************/ 1684void inline_speed
333 1685call_pending (EV_P)
334void ev_prefork (void)
335{ 1686{
336 /* nop */
337}
338
339void ev_postfork_parent (void)
340{
341 /* nop */
342}
343
344void ev_postfork_child (void)
345{
346#if HAVE_EPOLL
347 if (ev_method == EVMETHOD_EPOLL)
348 epoll_postfork_child ();
349#endif
350
351 evio_stop (&sigev);
352 close (sigpipe [0]);
353 close (sigpipe [1]);
354 pipe (sigpipe);
355 siginit ();
356}
357
358/*****************************************************************************/
359
360static void
361fd_reify (void)
362{
363 int i; 1687 int pri;
364 1688
365 for (i = 0; i < fdchangecnt; ++i) 1689 for (pri = NUMPRI; pri--; )
1690 while (pendingcnt [pri])
366 { 1691 {
367 int fd = fdchanges [i]; 1692 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
368 ANFD *anfd = anfds + fd;
369 struct ev_io *w;
370 1693
371 int wev = 0; 1694 if (expect_true (p->w))
1695 {
1696 /*assert (("non-pending watcher on pending list", p->w->pending));*/
372 1697
373 for (w = anfd->head; w; w = w->next) 1698 p->w->pending = 0;
374 wev |= w->events; 1699 EV_CB_INVOKE (p->w, p->events);
1700 EV_FREQUENT_CHECK;
1701 }
1702 }
1703}
375 1704
376 if (anfd->wev != wev) 1705#if EV_IDLE_ENABLE
1706void inline_size
1707idle_reify (EV_P)
1708{
1709 if (expect_false (idleall))
1710 {
1711 int pri;
1712
1713 for (pri = NUMPRI; pri--; )
377 { 1714 {
378 method_modify (fd, anfd->wev, wev); 1715 if (pendingcnt [pri])
379 anfd->wev = wev; 1716 break;
1717
1718 if (idlecnt [pri])
1719 {
1720 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1721 break;
1722 }
380 } 1723 }
381 } 1724 }
382
383 fdchangecnt = 0;
384} 1725}
1726#endif
385 1727
386static void 1728void inline_size
387call_pending ()
388{
389 int i;
390
391 for (i = 0; i < pendingcnt; ++i)
392 {
393 ANPENDING *p = pendings + i;
394
395 if (p->w)
396 {
397 p->w->pending = 0;
398 p->w->cb (p->w, p->events);
399 }
400 }
401
402 pendingcnt = 0;
403}
404
405static void
406timers_reify () 1729timers_reify (EV_P)
407{ 1730{
1731 EV_FREQUENT_CHECK;
1732
408 while (timercnt && timers [0]->at <= now) 1733 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
409 { 1734 {
410 struct ev_timer *w = timers [0]; 1735 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1736
1737 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
411 1738
412 /* first reschedule or stop timer */ 1739 /* first reschedule or stop timer */
413 if (w->repeat) 1740 if (w->repeat)
414 { 1741 {
415 w->at = now + w->repeat; 1742 ev_at (w) += w->repeat;
416 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1743 if (ev_at (w) < mn_now)
1744 ev_at (w) = mn_now;
1745
1746 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1747
1748 ANHE_at_cache (timers [HEAP0]);
417 downheap ((WT *)timers, timercnt, 0); 1749 downheap (timers, timercnt, HEAP0);
418 } 1750 }
419 else 1751 else
420 evtimer_stop (w); /* nonrepeating: stop timer */ 1752 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
421 1753
1754 EV_FREQUENT_CHECK;
422 event ((W)w, EV_TIMEOUT); 1755 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
423 } 1756 }
424} 1757}
425 1758
426static void 1759#if EV_PERIODIC_ENABLE
1760void inline_size
427periodics_reify () 1761periodics_reify (EV_P)
428{ 1762{
1763 EV_FREQUENT_CHECK;
1764
429 while (periodiccnt && periodics [0]->at <= ev_now) 1765 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
430 { 1766 {
431 struct ev_periodic *w = periodics [0]; 1767 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1768
1769 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
432 1770
433 /* first reschedule or stop timer */ 1771 /* first reschedule or stop timer */
434 if (w->interval) 1772 if (w->reschedule_cb)
435 { 1773 {
436 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1774 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
437 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1775
1776 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1777
1778 ANHE_at_cache (periodics [HEAP0]);
438 downheap ((WT *)periodics, periodiccnt, 0); 1779 downheap (periodics, periodiccnt, HEAP0);
1780 }
1781 else if (w->interval)
1782 {
1783 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1784 /* if next trigger time is not sufficiently in the future, put it there */
1785 /* this might happen because of floating point inexactness */
1786 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1787 {
1788 ev_at (w) += w->interval;
1789
1790 /* if interval is unreasonably low we might still have a time in the past */
1791 /* so correct this. this will make the periodic very inexact, but the user */
1792 /* has effectively asked to get triggered more often than possible */
1793 if (ev_at (w) < ev_rt_now)
1794 ev_at (w) = ev_rt_now;
1795 }
1796
1797 ANHE_at_cache (periodics [HEAP0]);
1798 downheap (periodics, periodiccnt, HEAP0);
439 } 1799 }
440 else 1800 else
441 evperiodic_stop (w); /* nonrepeating: stop timer */ 1801 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
442 1802
443 event ((W)w, EV_TIMEOUT); 1803 EV_FREQUENT_CHECK;
1804 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
444 } 1805 }
445} 1806}
446 1807
447static void 1808static void noinline
448periodics_reschedule (ev_tstamp diff) 1809periodics_reschedule (EV_P)
449{ 1810{
450 int i; 1811 int i;
451 1812
452 /* adjust periodics after time jump */ 1813 /* adjust periodics after time jump */
453 for (i = 0; i < periodiccnt; ++i) 1814 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
454 { 1815 {
455 struct ev_periodic *w = periodics [i]; 1816 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
456 1817
1818 if (w->reschedule_cb)
1819 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
457 if (w->interval) 1820 else if (w->interval)
1821 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1822
1823 ANHE_at_cache (periodics [i]);
1824 }
1825
1826 reheap (periodics, periodiccnt);
1827}
1828#endif
1829
1830void inline_speed
1831time_update (EV_P_ ev_tstamp max_block)
1832{
1833 int i;
1834
1835#if EV_USE_MONOTONIC
1836 if (expect_true (have_monotonic))
1837 {
1838 ev_tstamp odiff = rtmn_diff;
1839
1840 mn_now = get_clock ();
1841
1842 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1843 /* interpolate in the meantime */
1844 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
458 { 1845 {
459 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1846 ev_rt_now = rtmn_diff + mn_now;
1847 return;
1848 }
460 1849
461 if (fabs (diff) >= 1e-4) 1850 now_floor = mn_now;
1851 ev_rt_now = ev_time ();
1852
1853 /* loop a few times, before making important decisions.
1854 * on the choice of "4": one iteration isn't enough,
1855 * in case we get preempted during the calls to
1856 * ev_time and get_clock. a second call is almost guaranteed
1857 * to succeed in that case, though. and looping a few more times
1858 * doesn't hurt either as we only do this on time-jumps or
1859 * in the unlikely event of having been preempted here.
1860 */
1861 for (i = 4; --i; )
1862 {
1863 rtmn_diff = ev_rt_now - mn_now;
1864
1865 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1866 return; /* all is well */
1867
1868 ev_rt_now = ev_time ();
1869 mn_now = get_clock ();
1870 now_floor = mn_now;
1871 }
1872
1873# if EV_PERIODIC_ENABLE
1874 periodics_reschedule (EV_A);
1875# endif
1876 /* no timer adjustment, as the monotonic clock doesn't jump */
1877 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1878 }
1879 else
1880#endif
1881 {
1882 ev_rt_now = ev_time ();
1883
1884 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1885 {
1886#if EV_PERIODIC_ENABLE
1887 periodics_reschedule (EV_A);
1888#endif
1889 /* adjust timers. this is easy, as the offset is the same for all of them */
1890 for (i = 0; i < timercnt; ++i)
462 { 1891 {
463 evperiodic_stop (w); 1892 ANHE *he = timers + i + HEAP0;
464 evperiodic_start (w); 1893 ANHE_w (*he)->at += ev_rt_now - mn_now;
465 1894 ANHE_at_cache (*he);
466 i = 0; /* restart loop, inefficient, but time jumps should be rare */
467 } 1895 }
468 } 1896 }
469 }
470}
471 1897
472static void 1898 mn_now = ev_rt_now;
473time_update ()
474{
475 int i;
476
477 ev_now = ev_time ();
478
479 if (have_monotonic)
480 { 1899 }
481 ev_tstamp odiff = diff; 1900}
482 1901
483 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1902void
1903ev_ref (EV_P)
1904{
1905 ++activecnt;
1906}
1907
1908void
1909ev_unref (EV_P)
1910{
1911 --activecnt;
1912}
1913
1914static int loop_done;
1915
1916void
1917ev_loop (EV_P_ int flags)
1918{
1919 loop_done = EVUNLOOP_CANCEL;
1920
1921 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1922
1923 do
1924 {
1925#if EV_VERIFY >= 2
1926 ev_loop_verify (EV_A);
1927#endif
1928
1929#ifndef _WIN32
1930 if (expect_false (curpid)) /* penalise the forking check even more */
1931 if (expect_false (getpid () != curpid))
1932 {
1933 curpid = getpid ();
1934 postfork = 1;
1935 }
1936#endif
1937
1938#if EV_FORK_ENABLE
1939 /* we might have forked, so queue fork handlers */
1940 if (expect_false (postfork))
1941 if (forkcnt)
1942 {
1943 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1944 call_pending (EV_A);
1945 }
1946#endif
1947
1948 /* queue prepare watchers (and execute them) */
1949 if (expect_false (preparecnt))
484 { 1950 {
485 now = get_clock (); 1951 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
486 diff = ev_now - now; 1952 call_pending (EV_A);
487
488 if (fabs (odiff - diff) < MIN_TIMEJUMP)
489 return; /* all is well */
490
491 ev_now = ev_time ();
492 } 1953 }
493 1954
494 periodics_reschedule (diff - odiff); 1955 if (expect_false (!activecnt))
495 /* no timer adjustment, as the monotonic clock doesn't jump */ 1956 break;
496 }
497 else
498 {
499 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
500 {
501 periodics_reschedule (ev_now - now);
502 1957
503 /* adjust timers. this is easy, as the offset is the same for all */ 1958 /* we might have forked, so reify kernel state if necessary */
504 for (i = 0; i < timercnt; ++i) 1959 if (expect_false (postfork))
505 timers [i]->at += diff; 1960 loop_fork (EV_A);
506 }
507 1961
508 now = ev_now;
509 }
510}
511
512int ev_loop_done;
513
514void ev_loop (int flags)
515{
516 double block;
517 ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
518
519 if (checkcnt)
520 {
521 queue_events ((W *)checks, checkcnt, EV_CHECK);
522 call_pending ();
523 }
524
525 do
526 {
527 /* update fd-related kernel structures */ 1962 /* update fd-related kernel structures */
528 fd_reify (); 1963 fd_reify (EV_A);
529 1964
530 /* calculate blocking time */ 1965 /* calculate blocking time */
1966 {
1967 ev_tstamp waittime = 0.;
1968 ev_tstamp sleeptime = 0.;
531 1969
532 /* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */ 1970 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
533 ev_now = ev_time ();
534
535 if (flags & EVLOOP_NONBLOCK || idlecnt)
536 block = 0.;
537 else
538 { 1971 {
1972 /* update time to cancel out callback processing overhead */
1973 time_update (EV_A_ 1e100);
1974
539 block = MAX_BLOCKTIME; 1975 waittime = MAX_BLOCKTIME;
540 1976
541 if (timercnt) 1977 if (timercnt)
542 { 1978 {
543 ev_tstamp to = timers [0]->at - get_clock () + method_fudge; 1979 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
544 if (block > to) block = to; 1980 if (waittime > to) waittime = to;
545 } 1981 }
546 1982
1983#if EV_PERIODIC_ENABLE
547 if (periodiccnt) 1984 if (periodiccnt)
548 { 1985 {
549 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1986 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
550 if (block > to) block = to; 1987 if (waittime > to) waittime = to;
551 } 1988 }
1989#endif
552 1990
553 if (block < 0.) block = 0.; 1991 if (expect_false (waittime < timeout_blocktime))
1992 waittime = timeout_blocktime;
1993
1994 sleeptime = waittime - backend_fudge;
1995
1996 if (expect_true (sleeptime > io_blocktime))
1997 sleeptime = io_blocktime;
1998
1999 if (sleeptime)
2000 {
2001 ev_sleep (sleeptime);
2002 waittime -= sleeptime;
2003 }
554 } 2004 }
555 2005
556 method_poll (block); 2006 ++loop_count;
2007 backend_poll (EV_A_ waittime);
557 2008
558 /* update ev_now, do magic */ 2009 /* update ev_rt_now, do magic */
559 time_update (); 2010 time_update (EV_A_ waittime + sleeptime);
2011 }
560 2012
561 /* queue pending timers and reschedule them */ 2013 /* queue pending timers and reschedule them */
2014 timers_reify (EV_A); /* relative timers called last */
2015#if EV_PERIODIC_ENABLE
562 periodics_reify (); /* absolute timers first */ 2016 periodics_reify (EV_A); /* absolute timers called first */
563 timers_reify (); /* relative timers second */ 2017#endif
564 2018
2019#if EV_IDLE_ENABLE
565 /* queue idle watchers unless io or timers are pending */ 2020 /* queue idle watchers unless other events are pending */
566 if (!pendingcnt) 2021 idle_reify (EV_A);
567 queue_events ((W *)idles, idlecnt, EV_IDLE); 2022#endif
568 2023
569 /* queue check and possibly idle watchers */ 2024 /* queue check watchers, to be executed first */
2025 if (expect_false (checkcnt))
570 queue_events ((W *)checks, checkcnt, EV_CHECK); 2026 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
571 2027
572 call_pending (); 2028 call_pending (EV_A);
573 } 2029 }
574 while (!ev_loop_done); 2030 while (expect_true (
2031 activecnt
2032 && !loop_done
2033 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2034 ));
575 2035
576 if (ev_loop_done != 2) 2036 if (loop_done == EVUNLOOP_ONE)
2037 loop_done = EVUNLOOP_CANCEL;
2038}
2039
2040void
2041ev_unloop (EV_P_ int how)
2042{
577 ev_loop_done = 0; 2043 loop_done = how;
578} 2044}
579 2045
580/*****************************************************************************/ 2046/*****************************************************************************/
581 2047
582static void 2048void inline_size
583wlist_add (WL *head, WL elem) 2049wlist_add (WL *head, WL elem)
584{ 2050{
585 elem->next = *head; 2051 elem->next = *head;
586 *head = elem; 2052 *head = elem;
587} 2053}
588 2054
589static void 2055void inline_size
590wlist_del (WL *head, WL elem) 2056wlist_del (WL *head, WL elem)
591{ 2057{
592 while (*head) 2058 while (*head)
593 { 2059 {
594 if (*head == elem) 2060 if (*head == elem)
… …
599 2065
600 head = &(*head)->next; 2066 head = &(*head)->next;
601 } 2067 }
602} 2068}
603 2069
604static void 2070void inline_speed
2071clear_pending (EV_P_ W w)
2072{
2073 if (w->pending)
2074 {
2075 pendings [ABSPRI (w)][w->pending - 1].w = 0;
2076 w->pending = 0;
2077 }
2078}
2079
2080int
2081ev_clear_pending (EV_P_ void *w)
2082{
2083 W w_ = (W)w;
2084 int pending = w_->pending;
2085
2086 if (expect_true (pending))
2087 {
2088 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2089 w_->pending = 0;
2090 p->w = 0;
2091 return p->events;
2092 }
2093 else
2094 return 0;
2095}
2096
2097void inline_size
2098pri_adjust (EV_P_ W w)
2099{
2100 int pri = w->priority;
2101 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2102 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2103 w->priority = pri;
2104}
2105
2106void inline_speed
605ev_start (W w, int active) 2107ev_start (EV_P_ W w, int active)
606{ 2108{
607 w->pending = 0; 2109 pri_adjust (EV_A_ w);
608 w->active = active; 2110 w->active = active;
2111 ev_ref (EV_A);
609} 2112}
610 2113
611static void 2114void inline_size
612ev_stop (W w) 2115ev_stop (EV_P_ W w)
613{ 2116{
614 if (w->pending) 2117 ev_unref (EV_A);
615 pendings [w->pending - 1].w = 0;
616
617 w->active = 0; 2118 w->active = 0;
618} 2119}
619 2120
620/*****************************************************************************/ 2121/*****************************************************************************/
621 2122
622void 2123void noinline
623evio_start (struct ev_io *w) 2124ev_io_start (EV_P_ ev_io *w)
624{ 2125{
2126 int fd = w->fd;
2127
2128 if (expect_false (ev_is_active (w)))
2129 return;
2130
2131 assert (("ev_io_start called with negative fd", fd >= 0));
2132
2133 EV_FREQUENT_CHECK;
2134
2135 ev_start (EV_A_ (W)w, 1);
2136 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
2137 wlist_add (&anfds[fd].head, (WL)w);
2138
2139 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
2140 w->events &= ~EV_IOFDSET;
2141
2142 EV_FREQUENT_CHECK;
2143}
2144
2145void noinline
2146ev_io_stop (EV_P_ ev_io *w)
2147{
2148 clear_pending (EV_A_ (W)w);
2149 if (expect_false (!ev_is_active (w)))
2150 return;
2151
2152 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2153
2154 EV_FREQUENT_CHECK;
2155
2156 wlist_del (&anfds[w->fd].head, (WL)w);
2157 ev_stop (EV_A_ (W)w);
2158
2159 fd_change (EV_A_ w->fd, 1);
2160
2161 EV_FREQUENT_CHECK;
2162}
2163
2164void noinline
2165ev_timer_start (EV_P_ ev_timer *w)
2166{
2167 if (expect_false (ev_is_active (w)))
2168 return;
2169
2170 ev_at (w) += mn_now;
2171
2172 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2173
2174 EV_FREQUENT_CHECK;
2175
2176 ++timercnt;
2177 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2178 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2179 ANHE_w (timers [ev_active (w)]) = (WT)w;
2180 ANHE_at_cache (timers [ev_active (w)]);
2181 upheap (timers, ev_active (w));
2182
2183 EV_FREQUENT_CHECK;
2184
2185 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2186}
2187
2188void noinline
2189ev_timer_stop (EV_P_ ev_timer *w)
2190{
2191 clear_pending (EV_A_ (W)w);
2192 if (expect_false (!ev_is_active (w)))
2193 return;
2194
2195 EV_FREQUENT_CHECK;
2196
2197 {
2198 int active = ev_active (w);
2199
2200 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2201
2202 --timercnt;
2203
2204 if (expect_true (active < timercnt + HEAP0))
2205 {
2206 timers [active] = timers [timercnt + HEAP0];
2207 adjustheap (timers, timercnt, active);
2208 }
2209 }
2210
2211 EV_FREQUENT_CHECK;
2212
2213 ev_at (w) -= mn_now;
2214
2215 ev_stop (EV_A_ (W)w);
2216}
2217
2218void noinline
2219ev_timer_again (EV_P_ ev_timer *w)
2220{
2221 EV_FREQUENT_CHECK;
2222
625 if (ev_is_active (w)) 2223 if (ev_is_active (w))
2224 {
2225 if (w->repeat)
2226 {
2227 ev_at (w) = mn_now + w->repeat;
2228 ANHE_at_cache (timers [ev_active (w)]);
2229 adjustheap (timers, timercnt, ev_active (w));
2230 }
2231 else
2232 ev_timer_stop (EV_A_ w);
2233 }
2234 else if (w->repeat)
2235 {
2236 ev_at (w) = w->repeat;
2237 ev_timer_start (EV_A_ w);
2238 }
2239
2240 EV_FREQUENT_CHECK;
2241}
2242
2243#if EV_PERIODIC_ENABLE
2244void noinline
2245ev_periodic_start (EV_P_ ev_periodic *w)
2246{
2247 if (expect_false (ev_is_active (w)))
626 return; 2248 return;
627 2249
628 int fd = w->fd; 2250 if (w->reschedule_cb)
2251 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2252 else if (w->interval)
2253 {
2254 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
2255 /* this formula differs from the one in periodic_reify because we do not always round up */
2256 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2257 }
2258 else
2259 ev_at (w) = w->offset;
629 2260
630 ev_start ((W)w, 1); 2261 EV_FREQUENT_CHECK;
631 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
632 wlist_add ((WL *)&anfds[fd].head, (WL)w);
633 2262
634 ++fdchangecnt; 2263 ++periodiccnt;
635 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 2264 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
636 fdchanges [fdchangecnt - 1] = fd; 2265 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
637} 2266 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2267 ANHE_at_cache (periodics [ev_active (w)]);
2268 upheap (periodics, ev_active (w));
638 2269
639void 2270 EV_FREQUENT_CHECK;
640evio_stop (struct ev_io *w) 2271
2272 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2273}
2274
2275void noinline
2276ev_periodic_stop (EV_P_ ev_periodic *w)
641{ 2277{
2278 clear_pending (EV_A_ (W)w);
642 if (!ev_is_active (w)) 2279 if (expect_false (!ev_is_active (w)))
643 return; 2280 return;
644 2281
645 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2282 EV_FREQUENT_CHECK;
2283
2284 {
2285 int active = ev_active (w);
2286
2287 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2288
2289 --periodiccnt;
2290
2291 if (expect_true (active < periodiccnt + HEAP0))
2292 {
2293 periodics [active] = periodics [periodiccnt + HEAP0];
2294 adjustheap (periodics, periodiccnt, active);
2295 }
2296 }
2297
2298 EV_FREQUENT_CHECK;
2299
646 ev_stop ((W)w); 2300 ev_stop (EV_A_ (W)w);
647
648 ++fdchangecnt;
649 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
650 fdchanges [fdchangecnt - 1] = w->fd;
651} 2301}
652 2302
653 2303void noinline
654void 2304ev_periodic_again (EV_P_ ev_periodic *w)
655evtimer_start (struct ev_timer *w)
656{ 2305{
2306 /* TODO: use adjustheap and recalculation */
2307 ev_periodic_stop (EV_A_ w);
2308 ev_periodic_start (EV_A_ w);
2309}
2310#endif
2311
2312#ifndef SA_RESTART
2313# define SA_RESTART 0
2314#endif
2315
2316void noinline
2317ev_signal_start (EV_P_ ev_signal *w)
2318{
2319#if EV_MULTIPLICITY
2320 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2321#endif
657 if (ev_is_active (w)) 2322 if (expect_false (ev_is_active (w)))
658 return; 2323 return;
659 2324
660 w->at += now; 2325 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
661 2326
662 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 2327 evpipe_init (EV_A);
663 2328
664 ev_start ((W)w, ++timercnt); 2329 EV_FREQUENT_CHECK;
665 array_needsize (timers, timermax, timercnt, );
666 timers [timercnt - 1] = w;
667 upheap ((WT *)timers, timercnt - 1);
668}
669 2330
670void 2331 {
671evtimer_stop (struct ev_timer *w) 2332#ifndef _WIN32
2333 sigset_t full, prev;
2334 sigfillset (&full);
2335 sigprocmask (SIG_SETMASK, &full, &prev);
2336#endif
2337
2338 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2339
2340#ifndef _WIN32
2341 sigprocmask (SIG_SETMASK, &prev, 0);
2342#endif
2343 }
2344
2345 ev_start (EV_A_ (W)w, 1);
2346 wlist_add (&signals [w->signum - 1].head, (WL)w);
2347
2348 if (!((WL)w)->next)
2349 {
2350#if _WIN32
2351 signal (w->signum, ev_sighandler);
2352#else
2353 struct sigaction sa;
2354 sa.sa_handler = ev_sighandler;
2355 sigfillset (&sa.sa_mask);
2356 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2357 sigaction (w->signum, &sa, 0);
2358#endif
2359 }
2360
2361 EV_FREQUENT_CHECK;
2362}
2363
2364void noinline
2365ev_signal_stop (EV_P_ ev_signal *w)
672{ 2366{
2367 clear_pending (EV_A_ (W)w);
673 if (!ev_is_active (w)) 2368 if (expect_false (!ev_is_active (w)))
674 return; 2369 return;
675 2370
676 if (w->active < timercnt--) 2371 EV_FREQUENT_CHECK;
677 {
678 timers [w->active - 1] = timers [timercnt];
679 downheap ((WT *)timers, timercnt, w->active - 1);
680 }
681 2372
682 ev_stop ((W)w);
683}
684
685void
686evperiodic_start (struct ev_periodic *w)
687{
688 if (ev_is_active (w))
689 return;
690
691 assert (("periodic interval value less than zero not allowed", w->interval >= 0.));
692
693 /* this formula differs from the one in periodic_reify because we do not always round up */
694 if (w->interval)
695 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
696
697 ev_start ((W)w, ++periodiccnt);
698 array_needsize (periodics, periodicmax, periodiccnt, );
699 periodics [periodiccnt - 1] = w;
700 upheap ((WT *)periodics, periodiccnt - 1);
701}
702
703void
704evperiodic_stop (struct ev_periodic *w)
705{
706 if (!ev_is_active (w))
707 return;
708
709 if (w->active < periodiccnt--)
710 {
711 periodics [w->active - 1] = periodics [periodiccnt];
712 downheap ((WT *)periodics, periodiccnt, w->active - 1);
713 }
714
715 ev_stop ((W)w);
716}
717
718void
719evsignal_start (struct ev_signal *w)
720{
721 if (ev_is_active (w))
722 return;
723
724 ev_start ((W)w, 1);
725 array_needsize (signals, signalmax, w->signum, signals_init);
726 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
727
728 if (!w->next)
729 {
730 struct sigaction sa;
731 sa.sa_handler = sighandler;
732 sigfillset (&sa.sa_mask);
733 sa.sa_flags = 0;
734 sigaction (w->signum, &sa, 0);
735 }
736}
737
738void
739evsignal_stop (struct ev_signal *w)
740{
741 if (!ev_is_active (w))
742 return;
743
744 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2373 wlist_del (&signals [w->signum - 1].head, (WL)w);
745 ev_stop ((W)w); 2374 ev_stop (EV_A_ (W)w);
746 2375
747 if (!signals [w->signum - 1].head) 2376 if (!signals [w->signum - 1].head)
748 signal (w->signum, SIG_DFL); 2377 signal (w->signum, SIG_DFL);
749}
750 2378
751void evidle_start (struct ev_idle *w) 2379 EV_FREQUENT_CHECK;
2380}
2381
2382void
2383ev_child_start (EV_P_ ev_child *w)
752{ 2384{
2385#if EV_MULTIPLICITY
2386 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2387#endif
753 if (ev_is_active (w)) 2388 if (expect_false (ev_is_active (w)))
754 return; 2389 return;
755 2390
756 ev_start ((W)w, ++idlecnt); 2391 EV_FREQUENT_CHECK;
757 array_needsize (idles, idlemax, idlecnt, );
758 idles [idlecnt - 1] = w;
759}
760 2392
761void evidle_stop (struct ev_idle *w) 2393 ev_start (EV_A_ (W)w, 1);
762{ 2394 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
763 idles [w->active - 1] = idles [--idlecnt];
764 ev_stop ((W)w);
765}
766 2395
767void evcheck_start (struct ev_check *w) 2396 EV_FREQUENT_CHECK;
2397}
2398
2399void
2400ev_child_stop (EV_P_ ev_child *w)
768{ 2401{
769 if (ev_is_active (w)) 2402 clear_pending (EV_A_ (W)w);
2403 if (expect_false (!ev_is_active (w)))
770 return; 2404 return;
771 2405
2406 EV_FREQUENT_CHECK;
2407
2408 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2409 ev_stop (EV_A_ (W)w);
2410
2411 EV_FREQUENT_CHECK;
2412}
2413
2414#if EV_STAT_ENABLE
2415
2416# ifdef _WIN32
2417# undef lstat
2418# define lstat(a,b) _stati64 (a,b)
2419# endif
2420
2421#define DEF_STAT_INTERVAL 5.0074891
2422#define MIN_STAT_INTERVAL 0.1074891
2423
2424static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2425
2426#if EV_USE_INOTIFY
2427# define EV_INOTIFY_BUFSIZE 8192
2428
2429static void noinline
2430infy_add (EV_P_ ev_stat *w)
2431{
2432 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);
2433
2434 if (w->wd < 0)
2435 {
2436 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2437
2438 /* monitor some parent directory for speedup hints */
2439 /* note that exceeding the hardcoded limit is not a correctness issue, */
2440 /* but an efficiency issue only */
2441 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2442 {
2443 char path [4096];
2444 strcpy (path, w->path);
2445
2446 do
2447 {
2448 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2449 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2450
2451 char *pend = strrchr (path, '/');
2452
2453 if (!pend)
2454 break; /* whoops, no '/', complain to your admin */
2455
2456 *pend = 0;
2457 w->wd = inotify_add_watch (fs_fd, path, mask);
2458 }
2459 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2460 }
2461 }
2462 else
2463 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2464
2465 if (w->wd >= 0)
2466 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2467}
2468
2469static void noinline
2470infy_del (EV_P_ ev_stat *w)
2471{
2472 int slot;
2473 int wd = w->wd;
2474
2475 if (wd < 0)
2476 return;
2477
2478 w->wd = -2;
2479 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2480 wlist_del (&fs_hash [slot].head, (WL)w);
2481
2482 /* remove this watcher, if others are watching it, they will rearm */
2483 inotify_rm_watch (fs_fd, wd);
2484}
2485
2486static void noinline
2487infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2488{
2489 if (slot < 0)
2490 /* overflow, need to check for all hahs slots */
2491 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2492 infy_wd (EV_A_ slot, wd, ev);
2493 else
2494 {
2495 WL w_;
2496
2497 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2498 {
2499 ev_stat *w = (ev_stat *)w_;
2500 w_ = w_->next; /* lets us remove this watcher and all before it */
2501
2502 if (w->wd == wd || wd == -1)
2503 {
2504 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2505 {
2506 w->wd = -1;
2507 infy_add (EV_A_ w); /* re-add, no matter what */
2508 }
2509
2510 stat_timer_cb (EV_A_ &w->timer, 0);
2511 }
2512 }
2513 }
2514}
2515
2516static void
2517infy_cb (EV_P_ ev_io *w, int revents)
2518{
2519 char buf [EV_INOTIFY_BUFSIZE];
2520 struct inotify_event *ev = (struct inotify_event *)buf;
2521 int ofs;
2522 int len = read (fs_fd, buf, sizeof (buf));
2523
2524 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2525 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2526}
2527
2528void inline_size
2529infy_init (EV_P)
2530{
2531 if (fs_fd != -2)
2532 return;
2533
2534 fs_fd = inotify_init ();
2535
2536 if (fs_fd >= 0)
2537 {
2538 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2539 ev_set_priority (&fs_w, EV_MAXPRI);
2540 ev_io_start (EV_A_ &fs_w);
2541 }
2542}
2543
2544void inline_size
2545infy_fork (EV_P)
2546{
2547 int slot;
2548
2549 if (fs_fd < 0)
2550 return;
2551
2552 close (fs_fd);
2553 fs_fd = inotify_init ();
2554
2555 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2556 {
2557 WL w_ = fs_hash [slot].head;
2558 fs_hash [slot].head = 0;
2559
2560 while (w_)
2561 {
2562 ev_stat *w = (ev_stat *)w_;
2563 w_ = w_->next; /* lets us add this watcher */
2564
2565 w->wd = -1;
2566
2567 if (fs_fd >= 0)
2568 infy_add (EV_A_ w); /* re-add, no matter what */
2569 else
2570 ev_timer_start (EV_A_ &w->timer);
2571 }
2572
2573 }
2574}
2575
2576#endif
2577
2578#ifdef _WIN32
2579# define EV_LSTAT(p,b) _stati64 (p, b)
2580#else
2581# define EV_LSTAT(p,b) lstat (p, b)
2582#endif
2583
2584void
2585ev_stat_stat (EV_P_ ev_stat *w)
2586{
2587 if (lstat (w->path, &w->attr) < 0)
2588 w->attr.st_nlink = 0;
2589 else if (!w->attr.st_nlink)
2590 w->attr.st_nlink = 1;
2591}
2592
2593static void noinline
2594stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2595{
2596 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2597
2598 /* we copy this here each the time so that */
2599 /* prev has the old value when the callback gets invoked */
2600 w->prev = w->attr;
2601 ev_stat_stat (EV_A_ w);
2602
2603 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2604 if (
2605 w->prev.st_dev != w->attr.st_dev
2606 || w->prev.st_ino != w->attr.st_ino
2607 || w->prev.st_mode != w->attr.st_mode
2608 || w->prev.st_nlink != w->attr.st_nlink
2609 || w->prev.st_uid != w->attr.st_uid
2610 || w->prev.st_gid != w->attr.st_gid
2611 || w->prev.st_rdev != w->attr.st_rdev
2612 || w->prev.st_size != w->attr.st_size
2613 || w->prev.st_atime != w->attr.st_atime
2614 || w->prev.st_mtime != w->attr.st_mtime
2615 || w->prev.st_ctime != w->attr.st_ctime
2616 ) {
2617 #if EV_USE_INOTIFY
2618 infy_del (EV_A_ w);
2619 infy_add (EV_A_ w);
2620 ev_stat_stat (EV_A_ w); /* avoid race... */
2621 #endif
2622
2623 ev_feed_event (EV_A_ w, EV_STAT);
2624 }
2625}
2626
2627void
2628ev_stat_start (EV_P_ ev_stat *w)
2629{
2630 if (expect_false (ev_is_active (w)))
2631 return;
2632
2633 /* since we use memcmp, we need to clear any padding data etc. */
2634 memset (&w->prev, 0, sizeof (ev_statdata));
2635 memset (&w->attr, 0, sizeof (ev_statdata));
2636
2637 ev_stat_stat (EV_A_ w);
2638
2639 if (w->interval < MIN_STAT_INTERVAL)
2640 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2641
2642 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2643 ev_set_priority (&w->timer, ev_priority (w));
2644
2645#if EV_USE_INOTIFY
2646 infy_init (EV_A);
2647
2648 if (fs_fd >= 0)
2649 infy_add (EV_A_ w);
2650 else
2651#endif
2652 ev_timer_start (EV_A_ &w->timer);
2653
2654 ev_start (EV_A_ (W)w, 1);
2655
2656 EV_FREQUENT_CHECK;
2657}
2658
2659void
2660ev_stat_stop (EV_P_ ev_stat *w)
2661{
2662 clear_pending (EV_A_ (W)w);
2663 if (expect_false (!ev_is_active (w)))
2664 return;
2665
2666 EV_FREQUENT_CHECK;
2667
2668#if EV_USE_INOTIFY
2669 infy_del (EV_A_ w);
2670#endif
2671 ev_timer_stop (EV_A_ &w->timer);
2672
2673 ev_stop (EV_A_ (W)w);
2674
2675 EV_FREQUENT_CHECK;
2676}
2677#endif
2678
2679#if EV_IDLE_ENABLE
2680void
2681ev_idle_start (EV_P_ ev_idle *w)
2682{
2683 if (expect_false (ev_is_active (w)))
2684 return;
2685
2686 pri_adjust (EV_A_ (W)w);
2687
2688 EV_FREQUENT_CHECK;
2689
2690 {
2691 int active = ++idlecnt [ABSPRI (w)];
2692
2693 ++idleall;
2694 ev_start (EV_A_ (W)w, active);
2695
2696 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2697 idles [ABSPRI (w)][active - 1] = w;
2698 }
2699
2700 EV_FREQUENT_CHECK;
2701}
2702
2703void
2704ev_idle_stop (EV_P_ ev_idle *w)
2705{
2706 clear_pending (EV_A_ (W)w);
2707 if (expect_false (!ev_is_active (w)))
2708 return;
2709
2710 EV_FREQUENT_CHECK;
2711
2712 {
2713 int active = ev_active (w);
2714
2715 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2716 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2717
2718 ev_stop (EV_A_ (W)w);
2719 --idleall;
2720 }
2721
2722 EV_FREQUENT_CHECK;
2723}
2724#endif
2725
2726void
2727ev_prepare_start (EV_P_ ev_prepare *w)
2728{
2729 if (expect_false (ev_is_active (w)))
2730 return;
2731
2732 EV_FREQUENT_CHECK;
2733
2734 ev_start (EV_A_ (W)w, ++preparecnt);
2735 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2736 prepares [preparecnt - 1] = w;
2737
2738 EV_FREQUENT_CHECK;
2739}
2740
2741void
2742ev_prepare_stop (EV_P_ ev_prepare *w)
2743{
2744 clear_pending (EV_A_ (W)w);
2745 if (expect_false (!ev_is_active (w)))
2746 return;
2747
2748 EV_FREQUENT_CHECK;
2749
2750 {
2751 int active = ev_active (w);
2752
2753 prepares [active - 1] = prepares [--preparecnt];
2754 ev_active (prepares [active - 1]) = active;
2755 }
2756
2757 ev_stop (EV_A_ (W)w);
2758
2759 EV_FREQUENT_CHECK;
2760}
2761
2762void
2763ev_check_start (EV_P_ ev_check *w)
2764{
2765 if (expect_false (ev_is_active (w)))
2766 return;
2767
2768 EV_FREQUENT_CHECK;
2769
772 ev_start ((W)w, ++checkcnt); 2770 ev_start (EV_A_ (W)w, ++checkcnt);
773 array_needsize (checks, checkmax, checkcnt, ); 2771 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
774 checks [checkcnt - 1] = w; 2772 checks [checkcnt - 1] = w;
775}
776 2773
2774 EV_FREQUENT_CHECK;
2775}
2776
2777void
777void evcheck_stop (struct ev_check *w) 2778ev_check_stop (EV_P_ ev_check *w)
778{ 2779{
2780 clear_pending (EV_A_ (W)w);
2781 if (expect_false (!ev_is_active (w)))
2782 return;
2783
2784 EV_FREQUENT_CHECK;
2785
2786 {
2787 int active = ev_active (w);
2788
779 checks [w->active - 1] = checks [--checkcnt]; 2789 checks [active - 1] = checks [--checkcnt];
2790 ev_active (checks [active - 1]) = active;
2791 }
2792
780 ev_stop ((W)w); 2793 ev_stop (EV_A_ (W)w);
2794
2795 EV_FREQUENT_CHECK;
781} 2796}
2797
2798#if EV_EMBED_ENABLE
2799void noinline
2800ev_embed_sweep (EV_P_ ev_embed *w)
2801{
2802 ev_loop (w->other, EVLOOP_NONBLOCK);
2803}
2804
2805static void
2806embed_io_cb (EV_P_ ev_io *io, int revents)
2807{
2808 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2809
2810 if (ev_cb (w))
2811 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2812 else
2813 ev_loop (w->other, EVLOOP_NONBLOCK);
2814}
2815
2816static void
2817embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2818{
2819 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2820
2821 {
2822 struct ev_loop *loop = w->other;
2823
2824 while (fdchangecnt)
2825 {
2826 fd_reify (EV_A);
2827 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2828 }
2829 }
2830}
2831
2832#if 0
2833static void
2834embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2835{
2836 ev_idle_stop (EV_A_ idle);
2837}
2838#endif
2839
2840void
2841ev_embed_start (EV_P_ ev_embed *w)
2842{
2843 if (expect_false (ev_is_active (w)))
2844 return;
2845
2846 {
2847 struct ev_loop *loop = w->other;
2848 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2849 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2850 }
2851
2852 EV_FREQUENT_CHECK;
2853
2854 ev_set_priority (&w->io, ev_priority (w));
2855 ev_io_start (EV_A_ &w->io);
2856
2857 ev_prepare_init (&w->prepare, embed_prepare_cb);
2858 ev_set_priority (&w->prepare, EV_MINPRI);
2859 ev_prepare_start (EV_A_ &w->prepare);
2860
2861 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2862
2863 ev_start (EV_A_ (W)w, 1);
2864
2865 EV_FREQUENT_CHECK;
2866}
2867
2868void
2869ev_embed_stop (EV_P_ ev_embed *w)
2870{
2871 clear_pending (EV_A_ (W)w);
2872 if (expect_false (!ev_is_active (w)))
2873 return;
2874
2875 EV_FREQUENT_CHECK;
2876
2877 ev_io_stop (EV_A_ &w->io);
2878 ev_prepare_stop (EV_A_ &w->prepare);
2879
2880 ev_stop (EV_A_ (W)w);
2881
2882 EV_FREQUENT_CHECK;
2883}
2884#endif
2885
2886#if EV_FORK_ENABLE
2887void
2888ev_fork_start (EV_P_ ev_fork *w)
2889{
2890 if (expect_false (ev_is_active (w)))
2891 return;
2892
2893 EV_FREQUENT_CHECK;
2894
2895 ev_start (EV_A_ (W)w, ++forkcnt);
2896 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2897 forks [forkcnt - 1] = w;
2898
2899 EV_FREQUENT_CHECK;
2900}
2901
2902void
2903ev_fork_stop (EV_P_ ev_fork *w)
2904{
2905 clear_pending (EV_A_ (W)w);
2906 if (expect_false (!ev_is_active (w)))
2907 return;
2908
2909 EV_FREQUENT_CHECK;
2910
2911 {
2912 int active = ev_active (w);
2913
2914 forks [active - 1] = forks [--forkcnt];
2915 ev_active (forks [active - 1]) = active;
2916 }
2917
2918 ev_stop (EV_A_ (W)w);
2919
2920 EV_FREQUENT_CHECK;
2921}
2922#endif
2923
2924#if EV_ASYNC_ENABLE
2925void
2926ev_async_start (EV_P_ ev_async *w)
2927{
2928 if (expect_false (ev_is_active (w)))
2929 return;
2930
2931 evpipe_init (EV_A);
2932
2933 EV_FREQUENT_CHECK;
2934
2935 ev_start (EV_A_ (W)w, ++asynccnt);
2936 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2937 asyncs [asynccnt - 1] = w;
2938
2939 EV_FREQUENT_CHECK;
2940}
2941
2942void
2943ev_async_stop (EV_P_ ev_async *w)
2944{
2945 clear_pending (EV_A_ (W)w);
2946 if (expect_false (!ev_is_active (w)))
2947 return;
2948
2949 EV_FREQUENT_CHECK;
2950
2951 {
2952 int active = ev_active (w);
2953
2954 asyncs [active - 1] = asyncs [--asynccnt];
2955 ev_active (asyncs [active - 1]) = active;
2956 }
2957
2958 ev_stop (EV_A_ (W)w);
2959
2960 EV_FREQUENT_CHECK;
2961}
2962
2963void
2964ev_async_send (EV_P_ ev_async *w)
2965{
2966 w->sent = 1;
2967 evpipe_write (EV_A_ &gotasync);
2968}
2969#endif
782 2970
783/*****************************************************************************/ 2971/*****************************************************************************/
784 2972
785#if 0 2973struct ev_once
786 2974{
787struct ev_io wio; 2975 ev_io io;
2976 ev_timer to;
2977 void (*cb)(int revents, void *arg);
2978 void *arg;
2979};
788 2980
789static void 2981static void
790sin_cb (struct ev_io *w, int revents) 2982once_cb (EV_P_ struct ev_once *once, int revents)
791{ 2983{
792 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 2984 void (*cb)(int revents, void *arg) = once->cb;
2985 void *arg = once->arg;
2986
2987 ev_io_stop (EV_A_ &once->io);
2988 ev_timer_stop (EV_A_ &once->to);
2989 ev_free (once);
2990
2991 cb (revents, arg);
793} 2992}
794 2993
795static void 2994static void
796ocb (struct ev_timer *w, int revents) 2995once_cb_io (EV_P_ ev_io *w, int revents)
797{ 2996{
798 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 2997 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
799 evtimer_stop (w);
800 evtimer_start (w);
801} 2998}
802 2999
803static void 3000static void
804scb (struct ev_signal *w, int revents) 3001once_cb_to (EV_P_ ev_timer *w, int revents)
805{ 3002{
806 fprintf (stderr, "signal %x,%d\n", revents, w->signum); 3003 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
807 evio_stop (&wio);
808 evio_start (&wio);
809} 3004}
810 3005
811static void 3006void
812gcb (struct ev_signal *w, int revents) 3007ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
813{ 3008{
814 fprintf (stderr, "generic %x\n", revents); 3009 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
815 3010
816} 3011 if (expect_false (!once))
817
818int main (void)
819{
820 ev_init (0);
821
822 evio_init (&wio, sin_cb, 0, EV_READ);
823 evio_start (&wio);
824
825 struct ev_timer t[10000];
826
827#if 0
828 int i;
829 for (i = 0; i < 10000; ++i)
830 {
831 struct ev_timer *w = t + i;
832 evw_init (w, ocb, i);
833 evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
834 evtimer_start (w);
835 if (drand48 () < 0.5)
836 evtimer_stop (w);
837 } 3012 {
838#endif 3013 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
839
840 struct ev_timer t1;
841 evtimer_init (&t1, ocb, 5, 10);
842 evtimer_start (&t1);
843
844 struct ev_signal sig;
845 evsignal_init (&sig, scb, SIGQUIT);
846 evsignal_start (&sig);
847
848 struct ev_check cw;
849 evcheck_init (&cw, gcb);
850 evcheck_start (&cw);
851
852 struct ev_idle iw;
853 evidle_init (&iw, gcb);
854 evidle_start (&iw);
855
856 ev_loop (0);
857
858 return 0; 3014 return;
859} 3015 }
860 3016
861#endif 3017 once->cb = cb;
3018 once->arg = arg;
862 3019
3020 ev_init (&once->io, once_cb_io);
3021 if (fd >= 0)
3022 {
3023 ev_io_set (&once->io, fd, events);
3024 ev_io_start (EV_A_ &once->io);
3025 }
863 3026
3027 ev_init (&once->to, once_cb_to);
3028 if (timeout >= 0.)
3029 {
3030 ev_timer_set (&once->to, timeout, 0.);
3031 ev_timer_start (EV_A_ &once->to);
3032 }
3033}
864 3034
3035#if EV_MULTIPLICITY
3036 #include "ev_wrap.h"
3037#endif
865 3038
3039#ifdef __cplusplus
3040}
3041#endif
3042

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