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Comparing libev/ev.c (file contents):
Revision 1.14 by root, Wed Oct 31 11:52:12 2007 UTC vs.
Revision 1.256 by root, Thu Jun 19 06:53:49 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 select (0, 0, 0, 0, &tv);
571#endif
572 }
573}
93 574
94/*****************************************************************************/ 575/*****************************************************************************/
95 576
577#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
578
579int inline_size
580array_nextsize (int elem, int cur, int cnt)
581{
582 int ncur = cur + 1;
583
584 do
585 ncur <<= 1;
586 while (cnt > ncur);
587
588 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
589 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
590 {
591 ncur *= elem;
592 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
593 ncur = ncur - sizeof (void *) * 4;
594 ncur /= elem;
595 }
596
597 return ncur;
598}
599
600static noinline void *
601array_realloc (int elem, void *base, int *cur, int cnt)
602{
603 *cur = array_nextsize (elem, *cur, cnt);
604 return ev_realloc (base, elem * *cur);
605}
606
607#define array_needsize(type,base,cur,cnt,init) \
608 if (expect_false ((cnt) > (cur))) \
609 { \
610 int ocur_ = (cur); \
611 (base) = (type *)array_realloc \
612 (sizeof (type), (base), &(cur), (cnt)); \
613 init ((base) + (ocur_), (cur) - ocur_); \
614 }
615
616#if 0
617#define array_slim(type,stem) \
618 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
619 { \
620 stem ## max = array_roundsize (stem ## cnt >> 1); \
621 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
622 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
623 }
624#endif
625
626#define array_free(stem, idx) \
627 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
628
629/*****************************************************************************/
630
631void noinline
632ev_feed_event (EV_P_ void *w, int revents)
633{
634 W w_ = (W)w;
635 int pri = ABSPRI (w_);
636
637 if (expect_false (w_->pending))
638 pendings [pri][w_->pending - 1].events |= revents;
639 else
640 {
641 w_->pending = ++pendingcnt [pri];
642 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
643 pendings [pri][w_->pending - 1].w = w_;
644 pendings [pri][w_->pending - 1].events = revents;
645 }
646}
647
648void inline_speed
649queue_events (EV_P_ W *events, int eventcnt, int type)
650{
651 int i;
652
653 for (i = 0; i < eventcnt; ++i)
654 ev_feed_event (EV_A_ events [i], type);
655}
656
657/*****************************************************************************/
658
659void inline_size
660anfds_init (ANFD *base, int count)
661{
662 while (count--)
663 {
664 base->head = 0;
665 base->events = EV_NONE;
666 base->reify = 0;
667
668 ++base;
669 }
670}
671
672void inline_speed
673fd_event (EV_P_ int fd, int revents)
674{
675 ANFD *anfd = anfds + fd;
676 ev_io *w;
677
678 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
679 {
680 int ev = w->events & revents;
681
682 if (ev)
683 ev_feed_event (EV_A_ (W)w, ev);
684 }
685}
686
687void
688ev_feed_fd_event (EV_P_ int fd, int revents)
689{
690 if (fd >= 0 && fd < anfdmax)
691 fd_event (EV_A_ fd, revents);
692}
693
694void inline_size
695fd_reify (EV_P)
696{
697 int i;
698
699 for (i = 0; i < fdchangecnt; ++i)
700 {
701 int fd = fdchanges [i];
702 ANFD *anfd = anfds + fd;
703 ev_io *w;
704
705 unsigned char events = 0;
706
707 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
708 events |= (unsigned char)w->events;
709
710#if EV_SELECT_IS_WINSOCKET
711 if (events)
712 {
713 unsigned long arg;
714 #ifdef EV_FD_TO_WIN32_HANDLE
715 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
716 #else
717 anfd->handle = _get_osfhandle (fd);
718 #endif
719 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
720 }
721#endif
722
723 {
724 unsigned char o_events = anfd->events;
725 unsigned char o_reify = anfd->reify;
726
727 anfd->reify = 0;
728 anfd->events = events;
729
730 if (o_events != events || o_reify & EV_IOFDSET)
731 backend_modify (EV_A_ fd, o_events, events);
732 }
733 }
734
735 fdchangecnt = 0;
736}
737
738void inline_size
739fd_change (EV_P_ int fd, int flags)
740{
741 unsigned char reify = anfds [fd].reify;
742 anfds [fd].reify |= flags;
743
744 if (expect_true (!reify))
745 {
746 ++fdchangecnt;
747 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
748 fdchanges [fdchangecnt - 1] = fd;
749 }
750}
751
752void inline_speed
753fd_kill (EV_P_ int fd)
754{
755 ev_io *w;
756
757 while ((w = (ev_io *)anfds [fd].head))
758 {
759 ev_io_stop (EV_A_ w);
760 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
761 }
762}
763
764int inline_size
765fd_valid (int fd)
766{
767#ifdef _WIN32
768 return _get_osfhandle (fd) != -1;
769#else
770 return fcntl (fd, F_GETFD) != -1;
771#endif
772}
773
774/* called on EBADF to verify fds */
775static void noinline
776fd_ebadf (EV_P)
777{
778 int fd;
779
780 for (fd = 0; fd < anfdmax; ++fd)
781 if (anfds [fd].events)
782 if (!fd_valid (fd) && errno == EBADF)
783 fd_kill (EV_A_ fd);
784}
785
786/* called on ENOMEM in select/poll to kill some fds and retry */
787static void noinline
788fd_enomem (EV_P)
789{
790 int fd;
791
792 for (fd = anfdmax; fd--; )
793 if (anfds [fd].events)
794 {
795 fd_kill (EV_A_ fd);
796 return;
797 }
798}
799
800/* usually called after fork if backend needs to re-arm all fds from scratch */
801static void noinline
802fd_rearm_all (EV_P)
803{
804 int fd;
805
806 for (fd = 0; fd < anfdmax; ++fd)
807 if (anfds [fd].events)
808 {
809 anfds [fd].events = 0;
810 fd_change (EV_A_ fd, EV_IOFDSET | 1);
811 }
812}
813
814/*****************************************************************************/
815
816/*
817 * the heap functions want a real array index. array index 0 uis guaranteed to not
818 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
819 * the branching factor of the d-tree.
820 */
821
822/*
823 * at the moment we allow libev the luxury of two heaps,
824 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
825 * which is more cache-efficient.
826 * the difference is about 5% with 50000+ watchers.
827 */
828#if EV_USE_4HEAP
829
830#define DHEAP 4
831#define HEAP0 (DHEAP - 1) /* index of first element in heap */
832#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
833#define UPHEAP_DONE(p,k) ((p) == (k))
834
835/* away from the root */
836void inline_speed
837downheap (ANHE *heap, int N, int k)
838{
839 ANHE he = heap [k];
840 ANHE *E = heap + N + HEAP0;
841
842 for (;;)
843 {
844 ev_tstamp minat;
845 ANHE *minpos;
846 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
847
848 /* find minimum child */
849 if (expect_true (pos + DHEAP - 1 < E))
850 {
851 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
852 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
853 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
854 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
855 }
856 else if (pos < E)
857 {
858 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
859 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
860 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
861 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
862 }
863 else
864 break;
865
866 if (ANHE_at (he) <= minat)
867 break;
868
869 heap [k] = *minpos;
870 ev_active (ANHE_w (*minpos)) = k;
871
872 k = minpos - heap;
873 }
874
875 heap [k] = he;
876 ev_active (ANHE_w (he)) = k;
877}
878
879#else /* 4HEAP */
880
881#define HEAP0 1
882#define HPARENT(k) ((k) >> 1)
883#define UPHEAP_DONE(p,k) (!(p))
884
885/* away from the root */
886void inline_speed
887downheap (ANHE *heap, int N, int k)
888{
889 ANHE he = heap [k];
890
891 for (;;)
892 {
893 int c = k << 1;
894
895 if (c > N + HEAP0 - 1)
896 break;
897
898 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
899 ? 1 : 0;
900
901 if (ANHE_at (he) <= ANHE_at (heap [c]))
902 break;
903
904 heap [k] = heap [c];
905 ev_active (ANHE_w (heap [k])) = k;
906
907 k = c;
908 }
909
910 heap [k] = he;
911 ev_active (ANHE_w (he)) = k;
912}
913#endif
914
915/* towards the root */
916void inline_speed
917upheap (ANHE *heap, int k)
918{
919 ANHE he = heap [k];
920
921 for (;;)
922 {
923 int p = HPARENT (k);
924
925 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
926 break;
927
928 heap [k] = heap [p];
929 ev_active (ANHE_w (heap [k])) = k;
930 k = p;
931 }
932
933 heap [k] = he;
934 ev_active (ANHE_w (he)) = k;
935}
936
937void inline_size
938adjustheap (ANHE *heap, int N, int k)
939{
940 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
941 upheap (heap, k);
942 else
943 downheap (heap, N, k);
944}
945
946/* rebuild the heap: this function is used only once and executed rarely */
947void inline_size
948reheap (ANHE *heap, int N)
949{
950 int i;
951
952 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
953 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
954 for (i = 0; i < N; ++i)
955 upheap (heap, i + HEAP0);
956}
957
958/*****************************************************************************/
959
96typedef struct 960typedef struct
97{ 961{
98 struct ev_io *head; 962 WL head;
99 unsigned char wev, rev; /* want, received event set */ 963 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; 964} ANSIG;
217 965
218static ANSIG *signals; 966static ANSIG *signals;
219static int signalmax; 967static int signalmax;
220 968
221static int sigpipe [2]; 969static EV_ATOMIC_T gotsig;
222static sig_atomic_t gotsig;
223static struct ev_io sigev;
224 970
225static void 971void inline_size
226signals_init (ANSIG *base, int count) 972signals_init (ANSIG *base, int count)
227{ 973{
228 while (count--) 974 while (count--)
229 { 975 {
230 base->head = 0; 976 base->head = 0;
231 base->gotsig = 0; 977 base->gotsig = 0;
978
232 ++base; 979 ++base;
233 } 980 }
234} 981}
235 982
983/*****************************************************************************/
984
985void inline_speed
986fd_intern (int fd)
987{
988#ifdef _WIN32
989 unsigned long arg = 1;
990 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
991#else
992 fcntl (fd, F_SETFD, FD_CLOEXEC);
993 fcntl (fd, F_SETFL, O_NONBLOCK);
994#endif
995}
996
997static void noinline
998evpipe_init (EV_P)
999{
1000 if (!ev_is_active (&pipeev))
1001 {
1002#if EV_USE_EVENTFD
1003 if ((evfd = eventfd (0, 0)) >= 0)
1004 {
1005 evpipe [0] = -1;
1006 fd_intern (evfd);
1007 ev_io_set (&pipeev, evfd, EV_READ);
1008 }
1009 else
1010#endif
1011 {
1012 while (pipe (evpipe))
1013 syserr ("(libev) error creating signal/async pipe");
1014
1015 fd_intern (evpipe [0]);
1016 fd_intern (evpipe [1]);
1017 ev_io_set (&pipeev, evpipe [0], EV_READ);
1018 }
1019
1020 ev_io_start (EV_A_ &pipeev);
1021 ev_unref (EV_A); /* watcher should not keep loop alive */
1022 }
1023}
1024
1025void inline_size
1026evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1027{
1028 if (!*flag)
1029 {
1030 int old_errno = errno; /* save errno because write might clobber it */
1031
1032 *flag = 1;
1033
1034#if EV_USE_EVENTFD
1035 if (evfd >= 0)
1036 {
1037 uint64_t counter = 1;
1038 write (evfd, &counter, sizeof (uint64_t));
1039 }
1040 else
1041#endif
1042 write (evpipe [1], &old_errno, 1);
1043
1044 errno = old_errno;
1045 }
1046}
1047
236static void 1048static void
1049pipecb (EV_P_ ev_io *iow, int revents)
1050{
1051#if EV_USE_EVENTFD
1052 if (evfd >= 0)
1053 {
1054 uint64_t counter;
1055 read (evfd, &counter, sizeof (uint64_t));
1056 }
1057 else
1058#endif
1059 {
1060 char dummy;
1061 read (evpipe [0], &dummy, 1);
1062 }
1063
1064 if (gotsig && ev_is_default_loop (EV_A))
1065 {
1066 int signum;
1067 gotsig = 0;
1068
1069 for (signum = signalmax; signum--; )
1070 if (signals [signum].gotsig)
1071 ev_feed_signal_event (EV_A_ signum + 1);
1072 }
1073
1074#if EV_ASYNC_ENABLE
1075 if (gotasync)
1076 {
1077 int i;
1078 gotasync = 0;
1079
1080 for (i = asynccnt; i--; )
1081 if (asyncs [i]->sent)
1082 {
1083 asyncs [i]->sent = 0;
1084 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1085 }
1086 }
1087#endif
1088}
1089
1090/*****************************************************************************/
1091
1092static void
237sighandler (int signum) 1093ev_sighandler (int signum)
238{ 1094{
1095#if EV_MULTIPLICITY
1096 struct ev_loop *loop = &default_loop_struct;
1097#endif
1098
1099#if _WIN32
1100 signal (signum, ev_sighandler);
1101#endif
1102
239 signals [signum - 1].gotsig = 1; 1103 signals [signum - 1].gotsig = 1;
1104 evpipe_write (EV_A_ &gotsig);
1105}
240 1106
241 if (!gotsig) 1107void noinline
1108ev_feed_signal_event (EV_P_ int signum)
1109{
1110 WL w;
1111
1112#if EV_MULTIPLICITY
1113 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1114#endif
1115
1116 --signum;
1117
1118 if (signum < 0 || signum >= signalmax)
1119 return;
1120
1121 signals [signum].gotsig = 0;
1122
1123 for (w = signals [signum].head; w; w = w->next)
1124 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1125}
1126
1127/*****************************************************************************/
1128
1129static WL childs [EV_PID_HASHSIZE];
1130
1131#ifndef _WIN32
1132
1133static ev_signal childev;
1134
1135#ifndef WIFCONTINUED
1136# define WIFCONTINUED(status) 0
1137#endif
1138
1139void inline_speed
1140child_reap (EV_P_ int chain, int pid, int status)
1141{
1142 ev_child *w;
1143 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1144
1145 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1146 {
1147 if ((w->pid == pid || !w->pid)
1148 && (!traced || (w->flags & 1)))
1149 {
1150 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1151 w->rpid = pid;
1152 w->rstatus = status;
1153 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1154 }
1155 }
1156}
1157
1158#ifndef WCONTINUED
1159# define WCONTINUED 0
1160#endif
1161
1162static void
1163childcb (EV_P_ ev_signal *sw, int revents)
1164{
1165 int pid, status;
1166
1167 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1168 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1169 if (!WCONTINUED
1170 || errno != EINVAL
1171 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1172 return;
1173
1174 /* make sure we are called again until all children have been reaped */
1175 /* we need to do it this way so that the callback gets called before we continue */
1176 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1177
1178 child_reap (EV_A_ pid, pid, status);
1179 if (EV_PID_HASHSIZE > 1)
1180 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1181}
1182
1183#endif
1184
1185/*****************************************************************************/
1186
1187#if EV_USE_PORT
1188# include "ev_port.c"
1189#endif
1190#if EV_USE_KQUEUE
1191# include "ev_kqueue.c"
1192#endif
1193#if EV_USE_EPOLL
1194# include "ev_epoll.c"
1195#endif
1196#if EV_USE_POLL
1197# include "ev_poll.c"
1198#endif
1199#if EV_USE_SELECT
1200# include "ev_select.c"
1201#endif
1202
1203int
1204ev_version_major (void)
1205{
1206 return EV_VERSION_MAJOR;
1207}
1208
1209int
1210ev_version_minor (void)
1211{
1212 return EV_VERSION_MINOR;
1213}
1214
1215/* return true if we are running with elevated privileges and should ignore env variables */
1216int inline_size
1217enable_secure (void)
1218{
1219#ifdef _WIN32
1220 return 0;
1221#else
1222 return getuid () != geteuid ()
1223 || getgid () != getegid ();
1224#endif
1225}
1226
1227unsigned int
1228ev_supported_backends (void)
1229{
1230 unsigned int flags = 0;
1231
1232 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1233 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1234 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1235 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1236 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1237
1238 return flags;
1239}
1240
1241unsigned int
1242ev_recommended_backends (void)
1243{
1244 unsigned int flags = ev_supported_backends ();
1245
1246#ifndef __NetBSD__
1247 /* kqueue is borked on everything but netbsd apparently */
1248 /* it usually doesn't work correctly on anything but sockets and pipes */
1249 flags &= ~EVBACKEND_KQUEUE;
1250#endif
1251#ifdef __APPLE__
1252 // flags &= ~EVBACKEND_KQUEUE; for documentation
1253 flags &= ~EVBACKEND_POLL;
1254#endif
1255
1256 return flags;
1257}
1258
1259unsigned int
1260ev_embeddable_backends (void)
1261{
1262 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1263
1264 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1265 /* please fix it and tell me how to detect the fix */
1266 flags &= ~EVBACKEND_EPOLL;
1267
1268 return flags;
1269}
1270
1271unsigned int
1272ev_backend (EV_P)
1273{
1274 return backend;
1275}
1276
1277unsigned int
1278ev_loop_count (EV_P)
1279{
1280 return loop_count;
1281}
1282
1283void
1284ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1285{
1286 io_blocktime = interval;
1287}
1288
1289void
1290ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1291{
1292 timeout_blocktime = interval;
1293}
1294
1295static void noinline
1296loop_init (EV_P_ unsigned int flags)
1297{
1298 if (!backend)
1299 {
1300#if EV_USE_MONOTONIC
242 { 1301 {
1302 struct timespec ts;
1303 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1304 have_monotonic = 1;
1305 }
1306#endif
1307
1308 ev_rt_now = ev_time ();
1309 mn_now = get_clock ();
1310 now_floor = mn_now;
1311 rtmn_diff = ev_rt_now - mn_now;
1312
1313 io_blocktime = 0.;
1314 timeout_blocktime = 0.;
1315 backend = 0;
1316 backend_fd = -1;
1317 gotasync = 0;
1318#if EV_USE_INOTIFY
1319 fs_fd = -2;
1320#endif
1321
1322 /* pid check not overridable via env */
1323#ifndef _WIN32
1324 if (flags & EVFLAG_FORKCHECK)
1325 curpid = getpid ();
1326#endif
1327
1328 if (!(flags & EVFLAG_NOENV)
1329 && !enable_secure ()
1330 && getenv ("LIBEV_FLAGS"))
1331 flags = atoi (getenv ("LIBEV_FLAGS"));
1332
1333 if (!(flags & 0x0000ffffU))
1334 flags |= ev_recommended_backends ();
1335
1336#if EV_USE_PORT
1337 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1338#endif
1339#if EV_USE_KQUEUE
1340 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1341#endif
1342#if EV_USE_EPOLL
1343 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1344#endif
1345#if EV_USE_POLL
1346 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1347#endif
1348#if EV_USE_SELECT
1349 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1350#endif
1351
1352 ev_init (&pipeev, pipecb);
1353 ev_set_priority (&pipeev, EV_MAXPRI);
1354 }
1355}
1356
1357static void noinline
1358loop_destroy (EV_P)
1359{
1360 int i;
1361
1362 if (ev_is_active (&pipeev))
1363 {
1364 ev_ref (EV_A); /* signal watcher */
1365 ev_io_stop (EV_A_ &pipeev);
1366
1367#if EV_USE_EVENTFD
1368 if (evfd >= 0)
1369 close (evfd);
1370#endif
1371
1372 if (evpipe [0] >= 0)
1373 {
1374 close (evpipe [0]);
1375 close (evpipe [1]);
1376 }
1377 }
1378
1379#if EV_USE_INOTIFY
1380 if (fs_fd >= 0)
1381 close (fs_fd);
1382#endif
1383
1384 if (backend_fd >= 0)
1385 close (backend_fd);
1386
1387#if EV_USE_PORT
1388 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1389#endif
1390#if EV_USE_KQUEUE
1391 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1392#endif
1393#if EV_USE_EPOLL
1394 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1395#endif
1396#if EV_USE_POLL
1397 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1398#endif
1399#if EV_USE_SELECT
1400 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1401#endif
1402
1403 for (i = NUMPRI; i--; )
1404 {
1405 array_free (pending, [i]);
1406#if EV_IDLE_ENABLE
1407 array_free (idle, [i]);
1408#endif
1409 }
1410
1411 ev_free (anfds); anfdmax = 0;
1412
1413 /* have to use the microsoft-never-gets-it-right macro */
1414 array_free (fdchange, EMPTY);
1415 array_free (timer, EMPTY);
1416#if EV_PERIODIC_ENABLE
1417 array_free (periodic, EMPTY);
1418#endif
1419#if EV_FORK_ENABLE
1420 array_free (fork, EMPTY);
1421#endif
1422 array_free (prepare, EMPTY);
1423 array_free (check, EMPTY);
1424#if EV_ASYNC_ENABLE
1425 array_free (async, EMPTY);
1426#endif
1427
1428 backend = 0;
1429}
1430
1431#if EV_USE_INOTIFY
1432void inline_size infy_fork (EV_P);
1433#endif
1434
1435void inline_size
1436loop_fork (EV_P)
1437{
1438#if EV_USE_PORT
1439 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1440#endif
1441#if EV_USE_KQUEUE
1442 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1443#endif
1444#if EV_USE_EPOLL
1445 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1446#endif
1447#if EV_USE_INOTIFY
1448 infy_fork (EV_A);
1449#endif
1450
1451 if (ev_is_active (&pipeev))
1452 {
1453 /* this "locks" the handlers against writing to the pipe */
1454 /* while we modify the fd vars */
243 gotsig = 1; 1455 gotsig = 1;
244 write (sigpipe [1], &gotsig, 1); 1456#if EV_ASYNC_ENABLE
245 } 1457 gotasync = 1;
246} 1458#endif
247 1459
248static void 1460 ev_ref (EV_A);
249sigcb (struct ev_io *iow, int revents) 1461 ev_io_stop (EV_A_ &pipeev);
1462
1463#if EV_USE_EVENTFD
1464 if (evfd >= 0)
1465 close (evfd);
1466#endif
1467
1468 if (evpipe [0] >= 0)
1469 {
1470 close (evpipe [0]);
1471 close (evpipe [1]);
1472 }
1473
1474 evpipe_init (EV_A);
1475 /* now iterate over everything, in case we missed something */
1476 pipecb (EV_A_ &pipeev, EV_READ);
1477 }
1478
1479 postfork = 0;
1480}
1481
1482#if EV_MULTIPLICITY
1483
1484struct ev_loop *
1485ev_loop_new (unsigned int flags)
250{ 1486{
251 struct ev_signal *w; 1487 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1488
1489 memset (loop, 0, sizeof (struct ev_loop));
1490
1491 loop_init (EV_A_ flags);
1492
1493 if (ev_backend (EV_A))
1494 return loop;
1495
1496 return 0;
1497}
1498
1499void
1500ev_loop_destroy (EV_P)
1501{
1502 loop_destroy (EV_A);
1503 ev_free (loop);
1504}
1505
1506void
1507ev_loop_fork (EV_P)
1508{
1509 postfork = 1; /* must be in line with ev_default_fork */
1510}
1511
1512#if EV_VERIFY
1513void noinline
1514verify_watcher (EV_P_ W w)
1515{
1516 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1517
1518 if (w->pending)
1519 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1520}
1521
1522static void noinline
1523verify_heap (EV_P_ ANHE *heap, int N)
1524{
252 int sig; 1525 int i;
253 1526
254 gotsig = 0; 1527 for (i = HEAP0; i < N + HEAP0; ++i)
255 read (sigpipe [0], &revents, 1); 1528 {
1529 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1530 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1531 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
256 1532
257 for (sig = signalmax; sig--; ) 1533 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
258 if (signals [sig].gotsig) 1534 }
1535}
1536
1537static void noinline
1538array_verify (EV_P_ W *ws, int cnt)
1539{
1540 while (cnt--)
1541 {
1542 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1543 verify_watcher (EV_A_ ws [cnt]);
1544 }
1545}
1546#endif
1547
1548void
1549ev_loop_verify (EV_P)
1550{
1551#if EV_VERIFY
1552 int i;
1553 WL w;
1554
1555 assert (activecnt >= -1);
1556
1557 assert (fdchangemax >= fdchangecnt);
1558 for (i = 0; i < fdchangecnt; ++i)
1559 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1560
1561 assert (anfdmax >= 0);
1562 for (i = 0; i < anfdmax; ++i)
1563 for (w = anfds [i].head; w; w = w->next)
259 { 1564 {
260 signals [sig].gotsig = 0; 1565 verify_watcher (EV_A_ (W)w);
261 1566 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
262 for (w = signals [sig].head; w; w = w->next) 1567 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
263 event ((W)w, EV_SIGNAL);
264 } 1568 }
265}
266 1569
267static void 1570 assert (timermax >= timercnt);
268siginit (void) 1571 verify_heap (EV_A_ timers, timercnt);
269{
270 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
271 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
272 1572
273 /* rather than sort out wether we really need nb, set it */ 1573#if EV_PERIODIC_ENABLE
274 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); 1574 assert (periodicmax >= periodiccnt);
275 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); 1575 verify_heap (EV_A_ periodics, periodiccnt);
1576#endif
276 1577
277 evio_set (&sigev, sigpipe [0], EV_READ); 1578 for (i = NUMPRI; i--; )
278 evio_start (&sigev); 1579 {
1580 assert (pendingmax [i] >= pendingcnt [i]);
1581#if EV_IDLE_ENABLE
1582 assert (idleall >= 0);
1583 assert (idlemax [i] >= idlecnt [i]);
1584 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1585#endif
1586 }
1587
1588#if EV_FORK_ENABLE
1589 assert (forkmax >= forkcnt);
1590 array_verify (EV_A_ (W *)forks, forkcnt);
1591#endif
1592
1593#if EV_ASYNC_ENABLE
1594 assert (asyncmax >= asynccnt);
1595 array_verify (EV_A_ (W *)asyncs, asynccnt);
1596#endif
1597
1598 assert (preparemax >= preparecnt);
1599 array_verify (EV_A_ (W *)prepares, preparecnt);
1600
1601 assert (checkmax >= checkcnt);
1602 array_verify (EV_A_ (W *)checks, checkcnt);
1603
1604# if 0
1605 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1606 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1607# endif
1608#endif
1609}
1610
1611#endif /* multiplicity */
1612
1613#if EV_MULTIPLICITY
1614struct ev_loop *
1615ev_default_loop_init (unsigned int flags)
1616#else
1617int
1618ev_default_loop (unsigned int flags)
1619#endif
1620{
1621 if (!ev_default_loop_ptr)
1622 {
1623#if EV_MULTIPLICITY
1624 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1625#else
1626 ev_default_loop_ptr = 1;
1627#endif
1628
1629 loop_init (EV_A_ flags);
1630
1631 if (ev_backend (EV_A))
1632 {
1633#ifndef _WIN32
1634 ev_signal_init (&childev, childcb, SIGCHLD);
1635 ev_set_priority (&childev, EV_MAXPRI);
1636 ev_signal_start (EV_A_ &childev);
1637 ev_unref (EV_A); /* child watcher should not keep loop alive */
1638#endif
1639 }
1640 else
1641 ev_default_loop_ptr = 0;
1642 }
1643
1644 return ev_default_loop_ptr;
1645}
1646
1647void
1648ev_default_destroy (void)
1649{
1650#if EV_MULTIPLICITY
1651 struct ev_loop *loop = ev_default_loop_ptr;
1652#endif
1653
1654#ifndef _WIN32
1655 ev_ref (EV_A); /* child watcher */
1656 ev_signal_stop (EV_A_ &childev);
1657#endif
1658
1659 loop_destroy (EV_A);
1660}
1661
1662void
1663ev_default_fork (void)
1664{
1665#if EV_MULTIPLICITY
1666 struct ev_loop *loop = ev_default_loop_ptr;
1667#endif
1668
1669 if (backend)
1670 postfork = 1; /* must be in line with ev_loop_fork */
279} 1671}
280 1672
281/*****************************************************************************/ 1673/*****************************************************************************/
282 1674
283static struct ev_idle **idles; 1675void
284static int idlemax, idlecnt; 1676ev_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{ 1677{
300#if HAVE_MONOTONIC 1678 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} 1679}
331 1680
332/*****************************************************************************/ 1681void inline_speed
333 1682call_pending (EV_P)
334void ev_prefork (void)
335{ 1683{
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; 1684 int pri;
364 1685
365 for (i = 0; i < fdchangecnt; ++i) 1686 for (pri = NUMPRI; pri--; )
1687 while (pendingcnt [pri])
366 { 1688 {
367 int fd = fdchanges [i]; 1689 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
368 ANFD *anfd = anfds + fd;
369 struct ev_io *w;
370 1690
371 int wev = 0; 1691 if (expect_true (p->w))
1692 {
1693 /*assert (("non-pending watcher on pending list", p->w->pending));*/
372 1694
373 for (w = anfd->head; w; w = w->next) 1695 p->w->pending = 0;
374 wev |= w->events; 1696 EV_CB_INVOKE (p->w, p->events);
1697 EV_FREQUENT_CHECK;
1698 }
1699 }
1700}
375 1701
376 if (anfd->wev != wev) 1702#if EV_IDLE_ENABLE
1703void inline_size
1704idle_reify (EV_P)
1705{
1706 if (expect_false (idleall))
1707 {
1708 int pri;
1709
1710 for (pri = NUMPRI; pri--; )
377 { 1711 {
378 method_modify (fd, anfd->wev, wev); 1712 if (pendingcnt [pri])
379 anfd->wev = wev; 1713 break;
1714
1715 if (idlecnt [pri])
1716 {
1717 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1718 break;
1719 }
380 } 1720 }
381 } 1721 }
382
383 fdchangecnt = 0;
384} 1722}
1723#endif
385 1724
386static void 1725void 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 () 1726timers_reify (EV_P)
407{ 1727{
1728 EV_FREQUENT_CHECK;
1729
408 while (timercnt && timers [0]->at <= now) 1730 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
409 { 1731 {
410 struct ev_timer *w = timers [0]; 1732 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1733
1734 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
411 1735
412 /* first reschedule or stop timer */ 1736 /* first reschedule or stop timer */
413 if (w->repeat) 1737 if (w->repeat)
414 { 1738 {
415 w->at = now + w->repeat; 1739 ev_at (w) += w->repeat;
416 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1740 if (ev_at (w) < mn_now)
1741 ev_at (w) = mn_now;
1742
1743 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1744
1745 ANHE_at_cache (timers [HEAP0]);
417 downheap ((WT *)timers, timercnt, 0); 1746 downheap (timers, timercnt, HEAP0);
418 } 1747 }
419 else 1748 else
420 evtimer_stop (w); /* nonrepeating: stop timer */ 1749 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
421 1750
1751 EV_FREQUENT_CHECK;
422 event ((W)w, EV_TIMEOUT); 1752 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
423 } 1753 }
424} 1754}
425 1755
426static void 1756#if EV_PERIODIC_ENABLE
1757void inline_size
427periodics_reify () 1758periodics_reify (EV_P)
428{ 1759{
1760 EV_FREQUENT_CHECK;
1761
429 while (periodiccnt && periodics [0]->at <= ev_now) 1762 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
430 { 1763 {
431 struct ev_periodic *w = periodics [0]; 1764 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1765
1766 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
432 1767
433 /* first reschedule or stop timer */ 1768 /* first reschedule or stop timer */
434 if (w->interval) 1769 if (w->reschedule_cb)
435 { 1770 {
436 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1771 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
437 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1772
1773 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1774
1775 ANHE_at_cache (periodics [HEAP0]);
438 downheap ((WT *)periodics, periodiccnt, 0); 1776 downheap (periodics, periodiccnt, HEAP0);
1777 }
1778 else if (w->interval)
1779 {
1780 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1781 /* if next trigger time is not sufficiently in the future, put it there */
1782 /* this might happen because of floating point inexactness */
1783 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1784 {
1785 ev_at (w) += w->interval;
1786
1787 /* if interval is unreasonably low we might still have a time in the past */
1788 /* so correct this. this will make the periodic very inexact, but the user */
1789 /* has effectively asked to get triggered more often than possible */
1790 if (ev_at (w) < ev_rt_now)
1791 ev_at (w) = ev_rt_now;
1792 }
1793
1794 ANHE_at_cache (periodics [HEAP0]);
1795 downheap (periodics, periodiccnt, HEAP0);
439 } 1796 }
440 else 1797 else
441 evperiodic_stop (w); /* nonrepeating: stop timer */ 1798 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
442 1799
443 event ((W)w, EV_TIMEOUT); 1800 EV_FREQUENT_CHECK;
1801 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
444 } 1802 }
445} 1803}
446 1804
447static void 1805static void noinline
448periodics_reschedule (ev_tstamp diff) 1806periodics_reschedule (EV_P)
449{ 1807{
450 int i; 1808 int i;
451 1809
452 /* adjust periodics after time jump */ 1810 /* adjust periodics after time jump */
453 for (i = 0; i < periodiccnt; ++i) 1811 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
454 { 1812 {
455 struct ev_periodic *w = periodics [i]; 1813 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
456 1814
1815 if (w->reschedule_cb)
1816 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
457 if (w->interval) 1817 else if (w->interval)
1818 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1819
1820 ANHE_at_cache (periodics [i]);
1821 }
1822
1823 reheap (periodics, periodiccnt);
1824}
1825#endif
1826
1827void inline_speed
1828time_update (EV_P_ ev_tstamp max_block)
1829{
1830 int i;
1831
1832#if EV_USE_MONOTONIC
1833 if (expect_true (have_monotonic))
1834 {
1835 ev_tstamp odiff = rtmn_diff;
1836
1837 mn_now = get_clock ();
1838
1839 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1840 /* interpolate in the meantime */
1841 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
458 { 1842 {
459 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1843 ev_rt_now = rtmn_diff + mn_now;
1844 return;
1845 }
460 1846
461 if (fabs (diff) >= 1e-4) 1847 now_floor = mn_now;
1848 ev_rt_now = ev_time ();
1849
1850 /* loop a few times, before making important decisions.
1851 * on the choice of "4": one iteration isn't enough,
1852 * in case we get preempted during the calls to
1853 * ev_time and get_clock. a second call is almost guaranteed
1854 * to succeed in that case, though. and looping a few more times
1855 * doesn't hurt either as we only do this on time-jumps or
1856 * in the unlikely event of having been preempted here.
1857 */
1858 for (i = 4; --i; )
1859 {
1860 rtmn_diff = ev_rt_now - mn_now;
1861
1862 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1863 return; /* all is well */
1864
1865 ev_rt_now = ev_time ();
1866 mn_now = get_clock ();
1867 now_floor = mn_now;
1868 }
1869
1870# if EV_PERIODIC_ENABLE
1871 periodics_reschedule (EV_A);
1872# endif
1873 /* no timer adjustment, as the monotonic clock doesn't jump */
1874 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1875 }
1876 else
1877#endif
1878 {
1879 ev_rt_now = ev_time ();
1880
1881 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1882 {
1883#if EV_PERIODIC_ENABLE
1884 periodics_reschedule (EV_A);
1885#endif
1886 /* adjust timers. this is easy, as the offset is the same for all of them */
1887 for (i = 0; i < timercnt; ++i)
462 { 1888 {
463 evperiodic_stop (w); 1889 ANHE *he = timers + i + HEAP0;
464 evperiodic_start (w); 1890 ANHE_w (*he)->at += ev_rt_now - mn_now;
465 1891 ANHE_at_cache (*he);
466 i = 0; /* restart loop, inefficient, but time jumps should be rare */
467 } 1892 }
468 } 1893 }
469 }
470}
471 1894
472static void 1895 mn_now = ev_rt_now;
473time_update ()
474{
475 int i;
476
477 ev_now = ev_time ();
478
479 if (have_monotonic)
480 { 1896 }
481 ev_tstamp odiff = diff; 1897}
482 1898
483 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1899void
1900ev_ref (EV_P)
1901{
1902 ++activecnt;
1903}
1904
1905void
1906ev_unref (EV_P)
1907{
1908 --activecnt;
1909}
1910
1911static int loop_done;
1912
1913void
1914ev_loop (EV_P_ int flags)
1915{
1916 loop_done = EVUNLOOP_CANCEL;
1917
1918 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1919
1920 do
1921 {
1922#if EV_VERIFY >= 2
1923 ev_loop_verify (EV_A);
1924#endif
1925
1926#ifndef _WIN32
1927 if (expect_false (curpid)) /* penalise the forking check even more */
1928 if (expect_false (getpid () != curpid))
1929 {
1930 curpid = getpid ();
1931 postfork = 1;
1932 }
1933#endif
1934
1935#if EV_FORK_ENABLE
1936 /* we might have forked, so queue fork handlers */
1937 if (expect_false (postfork))
1938 if (forkcnt)
1939 {
1940 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1941 call_pending (EV_A);
1942 }
1943#endif
1944
1945 /* queue prepare watchers (and execute them) */
1946 if (expect_false (preparecnt))
484 { 1947 {
485 now = get_clock (); 1948 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
486 diff = ev_now - now; 1949 call_pending (EV_A);
487
488 if (fabs (odiff - diff) < MIN_TIMEJUMP)
489 return; /* all is well */
490
491 ev_now = ev_time ();
492 } 1950 }
493 1951
494 periodics_reschedule (diff - odiff); 1952 if (expect_false (!activecnt))
495 /* no timer adjustment, as the monotonic clock doesn't jump */ 1953 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 1954
503 /* adjust timers. this is easy, as the offset is the same for all */ 1955 /* we might have forked, so reify kernel state if necessary */
504 for (i = 0; i < timercnt; ++i) 1956 if (expect_false (postfork))
505 timers [i]->at += diff; 1957 loop_fork (EV_A);
506 }
507 1958
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 */ 1959 /* update fd-related kernel structures */
528 fd_reify (); 1960 fd_reify (EV_A);
529 1961
530 /* calculate blocking time */ 1962 /* calculate blocking time */
1963 {
1964 ev_tstamp waittime = 0.;
1965 ev_tstamp sleeptime = 0.;
531 1966
532 /* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */ 1967 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 { 1968 {
1969 /* update time to cancel out callback processing overhead */
1970 time_update (EV_A_ 1e100);
1971
539 block = MAX_BLOCKTIME; 1972 waittime = MAX_BLOCKTIME;
540 1973
541 if (timercnt) 1974 if (timercnt)
542 { 1975 {
543 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 1976 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
544 if (block > to) block = to; 1977 if (waittime > to) waittime = to;
545 } 1978 }
546 1979
1980#if EV_PERIODIC_ENABLE
547 if (periodiccnt) 1981 if (periodiccnt)
548 { 1982 {
549 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1983 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
550 if (block > to) block = to; 1984 if (waittime > to) waittime = to;
551 } 1985 }
1986#endif
552 1987
553 if (block < 0.) block = 0.; 1988 if (expect_false (waittime < timeout_blocktime))
1989 waittime = timeout_blocktime;
1990
1991 sleeptime = waittime - backend_fudge;
1992
1993 if (expect_true (sleeptime > io_blocktime))
1994 sleeptime = io_blocktime;
1995
1996 if (sleeptime)
1997 {
1998 ev_sleep (sleeptime);
1999 waittime -= sleeptime;
2000 }
554 } 2001 }
555 2002
556 method_poll (block); 2003 ++loop_count;
2004 backend_poll (EV_A_ waittime);
557 2005
558 /* update ev_now, do magic */ 2006 /* update ev_rt_now, do magic */
559 time_update (); 2007 time_update (EV_A_ waittime + sleeptime);
2008 }
560 2009
561 /* queue pending timers and reschedule them */ 2010 /* queue pending timers and reschedule them */
2011 timers_reify (EV_A); /* relative timers called last */
2012#if EV_PERIODIC_ENABLE
562 periodics_reify (); /* absolute timers first */ 2013 periodics_reify (EV_A); /* absolute timers called first */
563 timers_reify (); /* relative timers second */ 2014#endif
564 2015
2016#if EV_IDLE_ENABLE
565 /* queue idle watchers unless io or timers are pending */ 2017 /* queue idle watchers unless other events are pending */
566 if (!pendingcnt) 2018 idle_reify (EV_A);
567 queue_events ((W *)idles, idlecnt, EV_IDLE); 2019#endif
568 2020
569 /* queue check and possibly idle watchers */ 2021 /* queue check watchers, to be executed first */
2022 if (expect_false (checkcnt))
570 queue_events ((W *)checks, checkcnt, EV_CHECK); 2023 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
571 2024
572 call_pending (); 2025 call_pending (EV_A);
573 } 2026 }
574 while (!ev_loop_done); 2027 while (expect_true (
2028 activecnt
2029 && !loop_done
2030 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2031 ));
575 2032
576 if (ev_loop_done != 2) 2033 if (loop_done == EVUNLOOP_ONE)
2034 loop_done = EVUNLOOP_CANCEL;
2035}
2036
2037void
2038ev_unloop (EV_P_ int how)
2039{
577 ev_loop_done = 0; 2040 loop_done = how;
578} 2041}
579 2042
580/*****************************************************************************/ 2043/*****************************************************************************/
581 2044
582static void 2045void inline_size
583wlist_add (WL *head, WL elem) 2046wlist_add (WL *head, WL elem)
584{ 2047{
585 elem->next = *head; 2048 elem->next = *head;
586 *head = elem; 2049 *head = elem;
587} 2050}
588 2051
589static void 2052void inline_size
590wlist_del (WL *head, WL elem) 2053wlist_del (WL *head, WL elem)
591{ 2054{
592 while (*head) 2055 while (*head)
593 { 2056 {
594 if (*head == elem) 2057 if (*head == elem)
… …
599 2062
600 head = &(*head)->next; 2063 head = &(*head)->next;
601 } 2064 }
602} 2065}
603 2066
604static void 2067void inline_speed
2068clear_pending (EV_P_ W w)
2069{
2070 if (w->pending)
2071 {
2072 pendings [ABSPRI (w)][w->pending - 1].w = 0;
2073 w->pending = 0;
2074 }
2075}
2076
2077int
2078ev_clear_pending (EV_P_ void *w)
2079{
2080 W w_ = (W)w;
2081 int pending = w_->pending;
2082
2083 if (expect_true (pending))
2084 {
2085 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2086 w_->pending = 0;
2087 p->w = 0;
2088 return p->events;
2089 }
2090 else
2091 return 0;
2092}
2093
2094void inline_size
2095pri_adjust (EV_P_ W w)
2096{
2097 int pri = w->priority;
2098 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2099 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2100 w->priority = pri;
2101}
2102
2103void inline_speed
605ev_start (W w, int active) 2104ev_start (EV_P_ W w, int active)
606{ 2105{
607 w->pending = 0; 2106 pri_adjust (EV_A_ w);
608 w->active = active; 2107 w->active = active;
2108 ev_ref (EV_A);
609} 2109}
610 2110
611static void 2111void inline_size
612ev_stop (W w) 2112ev_stop (EV_P_ W w)
613{ 2113{
614 if (w->pending) 2114 ev_unref (EV_A);
615 pendings [w->pending - 1].w = 0;
616
617 w->active = 0; 2115 w->active = 0;
618} 2116}
619 2117
620/*****************************************************************************/ 2118/*****************************************************************************/
621 2119
622void 2120void noinline
623evio_start (struct ev_io *w) 2121ev_io_start (EV_P_ ev_io *w)
624{ 2122{
2123 int fd = w->fd;
2124
625 if (ev_is_active (w)) 2125 if (expect_false (ev_is_active (w)))
626 return; 2126 return;
627 2127
628 int fd = w->fd; 2128 assert (("ev_io_start called with negative fd", fd >= 0));
629 2129
2130 EV_FREQUENT_CHECK;
2131
630 ev_start ((W)w, 1); 2132 ev_start (EV_A_ (W)w, 1);
631 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2133 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
632 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2134 wlist_add (&anfds[fd].head, (WL)w);
633 2135
634 ++fdchangecnt; 2136 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
635 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 2137 w->events &= ~EV_IOFDSET;
636 fdchanges [fdchangecnt - 1] = fd;
637}
638 2138
639void 2139 EV_FREQUENT_CHECK;
2140}
2141
2142void noinline
640evio_stop (struct ev_io *w) 2143ev_io_stop (EV_P_ ev_io *w)
641{ 2144{
2145 clear_pending (EV_A_ (W)w);
642 if (!ev_is_active (w)) 2146 if (expect_false (!ev_is_active (w)))
643 return; 2147 return;
644 2148
2149 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2150
2151 EV_FREQUENT_CHECK;
2152
645 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2153 wlist_del (&anfds[w->fd].head, (WL)w);
646 ev_stop ((W)w); 2154 ev_stop (EV_A_ (W)w);
647 2155
648 ++fdchangecnt; 2156 fd_change (EV_A_ w->fd, 1);
649 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
650 fdchanges [fdchangecnt - 1] = w->fd;
651}
652 2157
2158 EV_FREQUENT_CHECK;
2159}
653 2160
654void 2161void noinline
655evtimer_start (struct ev_timer *w) 2162ev_timer_start (EV_P_ ev_timer *w)
656{ 2163{
657 if (ev_is_active (w)) 2164 if (expect_false (ev_is_active (w)))
658 return; 2165 return;
659 2166
660 w->at += now; 2167 ev_at (w) += mn_now;
661 2168
662 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 2169 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
663 2170
664 ev_start ((W)w, ++timercnt); 2171 EV_FREQUENT_CHECK;
665 array_needsize (timers, timermax, timercnt, );
666 timers [timercnt - 1] = w;
667 upheap ((WT *)timers, timercnt - 1);
668}
669 2172
670void 2173 ++timercnt;
2174 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2175 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2176 ANHE_w (timers [ev_active (w)]) = (WT)w;
2177 ANHE_at_cache (timers [ev_active (w)]);
2178 upheap (timers, ev_active (w));
2179
2180 EV_FREQUENT_CHECK;
2181
2182 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2183}
2184
2185void noinline
671evtimer_stop (struct ev_timer *w) 2186ev_timer_stop (EV_P_ ev_timer *w)
672{ 2187{
2188 clear_pending (EV_A_ (W)w);
673 if (!ev_is_active (w)) 2189 if (expect_false (!ev_is_active (w)))
674 return; 2190 return;
675 2191
676 if (w->active < timercnt--) 2192 EV_FREQUENT_CHECK;
2193
2194 {
2195 int active = ev_active (w);
2196
2197 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2198
2199 --timercnt;
2200
2201 if (expect_true (active < timercnt + HEAP0))
677 { 2202 {
678 timers [w->active - 1] = timers [timercnt]; 2203 timers [active] = timers [timercnt + HEAP0];
679 downheap ((WT *)timers, timercnt, w->active - 1); 2204 adjustheap (timers, timercnt, active);
680 } 2205 }
2206 }
681 2207
682 w->at = w->repeat; 2208 EV_FREQUENT_CHECK;
683 2209
2210 ev_at (w) -= mn_now;
2211
684 ev_stop ((W)w); 2212 ev_stop (EV_A_ (W)w);
685} 2213}
686 2214
687void 2215void noinline
688evtimer_again (struct ev_timer *w) 2216ev_timer_again (EV_P_ ev_timer *w)
689{ 2217{
2218 EV_FREQUENT_CHECK;
2219
690 if (ev_is_active (w)) 2220 if (ev_is_active (w))
691 { 2221 {
692 if (w->repeat) 2222 if (w->repeat)
693 { 2223 {
694 w->at = now + w->repeat; 2224 ev_at (w) = mn_now + w->repeat;
2225 ANHE_at_cache (timers [ev_active (w)]);
695 downheap ((WT *)timers, timercnt, w->active - 1); 2226 adjustheap (timers, timercnt, ev_active (w));
696 } 2227 }
697 else 2228 else
698 evtimer_stop (w); 2229 ev_timer_stop (EV_A_ w);
699 } 2230 }
700 else if (w->repeat) 2231 else if (w->repeat)
2232 {
2233 ev_at (w) = w->repeat;
701 evtimer_start (w); 2234 ev_timer_start (EV_A_ w);
702} 2235 }
703 2236
704void 2237 EV_FREQUENT_CHECK;
2238}
2239
2240#if EV_PERIODIC_ENABLE
2241void noinline
705evperiodic_start (struct ev_periodic *w) 2242ev_periodic_start (EV_P_ ev_periodic *w)
706{ 2243{
707 if (ev_is_active (w)) 2244 if (expect_false (ev_is_active (w)))
708 return; 2245 return;
709 2246
710 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 2247 if (w->reschedule_cb)
711 2248 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2249 else if (w->interval)
2250 {
2251 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
712 /* this formula differs from the one in periodic_reify because we do not always round up */ 2252 /* this formula differs from the one in periodic_reify because we do not always round up */
713 if (w->interval)
714 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 2253 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2254 }
2255 else
2256 ev_at (w) = w->offset;
715 2257
2258 EV_FREQUENT_CHECK;
2259
2260 ++periodiccnt;
716 ev_start ((W)w, ++periodiccnt); 2261 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
717 array_needsize (periodics, periodicmax, periodiccnt, ); 2262 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
718 periodics [periodiccnt - 1] = w; 2263 ANHE_w (periodics [ev_active (w)]) = (WT)w;
719 upheap ((WT *)periodics, periodiccnt - 1); 2264 ANHE_at_cache (periodics [ev_active (w)]);
720} 2265 upheap (periodics, ev_active (w));
721 2266
722void 2267 EV_FREQUENT_CHECK;
2268
2269 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2270}
2271
2272void noinline
723evperiodic_stop (struct ev_periodic *w) 2273ev_periodic_stop (EV_P_ ev_periodic *w)
724{ 2274{
2275 clear_pending (EV_A_ (W)w);
725 if (!ev_is_active (w)) 2276 if (expect_false (!ev_is_active (w)))
726 return; 2277 return;
727 2278
728 if (w->active < periodiccnt--) 2279 EV_FREQUENT_CHECK;
2280
2281 {
2282 int active = ev_active (w);
2283
2284 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2285
2286 --periodiccnt;
2287
2288 if (expect_true (active < periodiccnt + HEAP0))
729 { 2289 {
730 periodics [w->active - 1] = periodics [periodiccnt]; 2290 periodics [active] = periodics [periodiccnt + HEAP0];
731 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2291 adjustheap (periodics, periodiccnt, active);
732 } 2292 }
2293 }
733 2294
2295 EV_FREQUENT_CHECK;
2296
734 ev_stop ((W)w); 2297 ev_stop (EV_A_ (W)w);
735} 2298}
736 2299
737void 2300void noinline
2301ev_periodic_again (EV_P_ ev_periodic *w)
2302{
2303 /* TODO: use adjustheap and recalculation */
2304 ev_periodic_stop (EV_A_ w);
2305 ev_periodic_start (EV_A_ w);
2306}
2307#endif
2308
2309#ifndef SA_RESTART
2310# define SA_RESTART 0
2311#endif
2312
2313void noinline
738evsignal_start (struct ev_signal *w) 2314ev_signal_start (EV_P_ ev_signal *w)
739{ 2315{
2316#if EV_MULTIPLICITY
2317 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2318#endif
740 if (ev_is_active (w)) 2319 if (expect_false (ev_is_active (w)))
741 return; 2320 return;
742 2321
743 ev_start ((W)w, 1); 2322 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2323
2324 evpipe_init (EV_A);
2325
2326 EV_FREQUENT_CHECK;
2327
2328 {
2329#ifndef _WIN32
2330 sigset_t full, prev;
2331 sigfillset (&full);
2332 sigprocmask (SIG_SETMASK, &full, &prev);
2333#endif
2334
744 array_needsize (signals, signalmax, w->signum, signals_init); 2335 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2336
2337#ifndef _WIN32
2338 sigprocmask (SIG_SETMASK, &prev, 0);
2339#endif
2340 }
2341
2342 ev_start (EV_A_ (W)w, 1);
745 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2343 wlist_add (&signals [w->signum - 1].head, (WL)w);
746 2344
747 if (!w->next) 2345 if (!((WL)w)->next)
748 { 2346 {
2347#if _WIN32
2348 signal (w->signum, ev_sighandler);
2349#else
749 struct sigaction sa; 2350 struct sigaction sa;
750 sa.sa_handler = sighandler; 2351 sa.sa_handler = ev_sighandler;
751 sigfillset (&sa.sa_mask); 2352 sigfillset (&sa.sa_mask);
752 sa.sa_flags = 0; 2353 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
753 sigaction (w->signum, &sa, 0); 2354 sigaction (w->signum, &sa, 0);
2355#endif
754 } 2356 }
755}
756 2357
757void 2358 EV_FREQUENT_CHECK;
2359}
2360
2361void noinline
758evsignal_stop (struct ev_signal *w) 2362ev_signal_stop (EV_P_ ev_signal *w)
759{ 2363{
2364 clear_pending (EV_A_ (W)w);
760 if (!ev_is_active (w)) 2365 if (expect_false (!ev_is_active (w)))
761 return; 2366 return;
762 2367
2368 EV_FREQUENT_CHECK;
2369
763 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2370 wlist_del (&signals [w->signum - 1].head, (WL)w);
764 ev_stop ((W)w); 2371 ev_stop (EV_A_ (W)w);
765 2372
766 if (!signals [w->signum - 1].head) 2373 if (!signals [w->signum - 1].head)
767 signal (w->signum, SIG_DFL); 2374 signal (w->signum, SIG_DFL);
768}
769 2375
770void evidle_start (struct ev_idle *w) 2376 EV_FREQUENT_CHECK;
2377}
2378
2379void
2380ev_child_start (EV_P_ ev_child *w)
771{ 2381{
2382#if EV_MULTIPLICITY
2383 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2384#endif
772 if (ev_is_active (w)) 2385 if (expect_false (ev_is_active (w)))
773 return; 2386 return;
774 2387
775 ev_start ((W)w, ++idlecnt); 2388 EV_FREQUENT_CHECK;
776 array_needsize (idles, idlemax, idlecnt, );
777 idles [idlecnt - 1] = w;
778}
779 2389
780void evidle_stop (struct ev_idle *w) 2390 ev_start (EV_A_ (W)w, 1);
781{ 2391 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
782 idles [w->active - 1] = idles [--idlecnt];
783 ev_stop ((W)w);
784}
785 2392
786void evcheck_start (struct ev_check *w) 2393 EV_FREQUENT_CHECK;
2394}
2395
2396void
2397ev_child_stop (EV_P_ ev_child *w)
787{ 2398{
788 if (ev_is_active (w)) 2399 clear_pending (EV_A_ (W)w);
2400 if (expect_false (!ev_is_active (w)))
789 return; 2401 return;
790 2402
2403 EV_FREQUENT_CHECK;
2404
2405 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2406 ev_stop (EV_A_ (W)w);
2407
2408 EV_FREQUENT_CHECK;
2409}
2410
2411#if EV_STAT_ENABLE
2412
2413# ifdef _WIN32
2414# undef lstat
2415# define lstat(a,b) _stati64 (a,b)
2416# endif
2417
2418#define DEF_STAT_INTERVAL 5.0074891
2419#define MIN_STAT_INTERVAL 0.1074891
2420
2421static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2422
2423#if EV_USE_INOTIFY
2424# define EV_INOTIFY_BUFSIZE 8192
2425
2426static void noinline
2427infy_add (EV_P_ ev_stat *w)
2428{
2429 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);
2430
2431 if (w->wd < 0)
2432 {
2433 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2434
2435 /* monitor some parent directory for speedup hints */
2436 /* note that exceeding the hardcoded limit is not a correctness issue, */
2437 /* but an efficiency issue only */
2438 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2439 {
2440 char path [4096];
2441 strcpy (path, w->path);
2442
2443 do
2444 {
2445 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2446 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2447
2448 char *pend = strrchr (path, '/');
2449
2450 if (!pend)
2451 break; /* whoops, no '/', complain to your admin */
2452
2453 *pend = 0;
2454 w->wd = inotify_add_watch (fs_fd, path, mask);
2455 }
2456 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2457 }
2458 }
2459 else
2460 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2461
2462 if (w->wd >= 0)
2463 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2464}
2465
2466static void noinline
2467infy_del (EV_P_ ev_stat *w)
2468{
2469 int slot;
2470 int wd = w->wd;
2471
2472 if (wd < 0)
2473 return;
2474
2475 w->wd = -2;
2476 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2477 wlist_del (&fs_hash [slot].head, (WL)w);
2478
2479 /* remove this watcher, if others are watching it, they will rearm */
2480 inotify_rm_watch (fs_fd, wd);
2481}
2482
2483static void noinline
2484infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2485{
2486 if (slot < 0)
2487 /* overflow, need to check for all hahs slots */
2488 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2489 infy_wd (EV_A_ slot, wd, ev);
2490 else
2491 {
2492 WL w_;
2493
2494 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2495 {
2496 ev_stat *w = (ev_stat *)w_;
2497 w_ = w_->next; /* lets us remove this watcher and all before it */
2498
2499 if (w->wd == wd || wd == -1)
2500 {
2501 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2502 {
2503 w->wd = -1;
2504 infy_add (EV_A_ w); /* re-add, no matter what */
2505 }
2506
2507 stat_timer_cb (EV_A_ &w->timer, 0);
2508 }
2509 }
2510 }
2511}
2512
2513static void
2514infy_cb (EV_P_ ev_io *w, int revents)
2515{
2516 char buf [EV_INOTIFY_BUFSIZE];
2517 struct inotify_event *ev = (struct inotify_event *)buf;
2518 int ofs;
2519 int len = read (fs_fd, buf, sizeof (buf));
2520
2521 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2522 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2523}
2524
2525void inline_size
2526infy_init (EV_P)
2527{
2528 if (fs_fd != -2)
2529 return;
2530
2531 fs_fd = inotify_init ();
2532
2533 if (fs_fd >= 0)
2534 {
2535 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2536 ev_set_priority (&fs_w, EV_MAXPRI);
2537 ev_io_start (EV_A_ &fs_w);
2538 }
2539}
2540
2541void inline_size
2542infy_fork (EV_P)
2543{
2544 int slot;
2545
2546 if (fs_fd < 0)
2547 return;
2548
2549 close (fs_fd);
2550 fs_fd = inotify_init ();
2551
2552 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2553 {
2554 WL w_ = fs_hash [slot].head;
2555 fs_hash [slot].head = 0;
2556
2557 while (w_)
2558 {
2559 ev_stat *w = (ev_stat *)w_;
2560 w_ = w_->next; /* lets us add this watcher */
2561
2562 w->wd = -1;
2563
2564 if (fs_fd >= 0)
2565 infy_add (EV_A_ w); /* re-add, no matter what */
2566 else
2567 ev_timer_start (EV_A_ &w->timer);
2568 }
2569
2570 }
2571}
2572
2573#endif
2574
2575#ifdef _WIN32
2576# define EV_LSTAT(p,b) _stati64 (p, b)
2577#else
2578# define EV_LSTAT(p,b) lstat (p, b)
2579#endif
2580
2581void
2582ev_stat_stat (EV_P_ ev_stat *w)
2583{
2584 if (lstat (w->path, &w->attr) < 0)
2585 w->attr.st_nlink = 0;
2586 else if (!w->attr.st_nlink)
2587 w->attr.st_nlink = 1;
2588}
2589
2590static void noinline
2591stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2592{
2593 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2594
2595 /* we copy this here each the time so that */
2596 /* prev has the old value when the callback gets invoked */
2597 w->prev = w->attr;
2598 ev_stat_stat (EV_A_ w);
2599
2600 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2601 if (
2602 w->prev.st_dev != w->attr.st_dev
2603 || w->prev.st_ino != w->attr.st_ino
2604 || w->prev.st_mode != w->attr.st_mode
2605 || w->prev.st_nlink != w->attr.st_nlink
2606 || w->prev.st_uid != w->attr.st_uid
2607 || w->prev.st_gid != w->attr.st_gid
2608 || w->prev.st_rdev != w->attr.st_rdev
2609 || w->prev.st_size != w->attr.st_size
2610 || w->prev.st_atime != w->attr.st_atime
2611 || w->prev.st_mtime != w->attr.st_mtime
2612 || w->prev.st_ctime != w->attr.st_ctime
2613 ) {
2614 #if EV_USE_INOTIFY
2615 infy_del (EV_A_ w);
2616 infy_add (EV_A_ w);
2617 ev_stat_stat (EV_A_ w); /* avoid race... */
2618 #endif
2619
2620 ev_feed_event (EV_A_ w, EV_STAT);
2621 }
2622}
2623
2624void
2625ev_stat_start (EV_P_ ev_stat *w)
2626{
2627 if (expect_false (ev_is_active (w)))
2628 return;
2629
2630 /* since we use memcmp, we need to clear any padding data etc. */
2631 memset (&w->prev, 0, sizeof (ev_statdata));
2632 memset (&w->attr, 0, sizeof (ev_statdata));
2633
2634 ev_stat_stat (EV_A_ w);
2635
2636 if (w->interval < MIN_STAT_INTERVAL)
2637 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2638
2639 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2640 ev_set_priority (&w->timer, ev_priority (w));
2641
2642#if EV_USE_INOTIFY
2643 infy_init (EV_A);
2644
2645 if (fs_fd >= 0)
2646 infy_add (EV_A_ w);
2647 else
2648#endif
2649 ev_timer_start (EV_A_ &w->timer);
2650
2651 ev_start (EV_A_ (W)w, 1);
2652
2653 EV_FREQUENT_CHECK;
2654}
2655
2656void
2657ev_stat_stop (EV_P_ ev_stat *w)
2658{
2659 clear_pending (EV_A_ (W)w);
2660 if (expect_false (!ev_is_active (w)))
2661 return;
2662
2663 EV_FREQUENT_CHECK;
2664
2665#if EV_USE_INOTIFY
2666 infy_del (EV_A_ w);
2667#endif
2668 ev_timer_stop (EV_A_ &w->timer);
2669
2670 ev_stop (EV_A_ (W)w);
2671
2672 EV_FREQUENT_CHECK;
2673}
2674#endif
2675
2676#if EV_IDLE_ENABLE
2677void
2678ev_idle_start (EV_P_ ev_idle *w)
2679{
2680 if (expect_false (ev_is_active (w)))
2681 return;
2682
2683 pri_adjust (EV_A_ (W)w);
2684
2685 EV_FREQUENT_CHECK;
2686
2687 {
2688 int active = ++idlecnt [ABSPRI (w)];
2689
2690 ++idleall;
2691 ev_start (EV_A_ (W)w, active);
2692
2693 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2694 idles [ABSPRI (w)][active - 1] = w;
2695 }
2696
2697 EV_FREQUENT_CHECK;
2698}
2699
2700void
2701ev_idle_stop (EV_P_ ev_idle *w)
2702{
2703 clear_pending (EV_A_ (W)w);
2704 if (expect_false (!ev_is_active (w)))
2705 return;
2706
2707 EV_FREQUENT_CHECK;
2708
2709 {
2710 int active = ev_active (w);
2711
2712 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2713 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2714
2715 ev_stop (EV_A_ (W)w);
2716 --idleall;
2717 }
2718
2719 EV_FREQUENT_CHECK;
2720}
2721#endif
2722
2723void
2724ev_prepare_start (EV_P_ ev_prepare *w)
2725{
2726 if (expect_false (ev_is_active (w)))
2727 return;
2728
2729 EV_FREQUENT_CHECK;
2730
2731 ev_start (EV_A_ (W)w, ++preparecnt);
2732 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2733 prepares [preparecnt - 1] = w;
2734
2735 EV_FREQUENT_CHECK;
2736}
2737
2738void
2739ev_prepare_stop (EV_P_ ev_prepare *w)
2740{
2741 clear_pending (EV_A_ (W)w);
2742 if (expect_false (!ev_is_active (w)))
2743 return;
2744
2745 EV_FREQUENT_CHECK;
2746
2747 {
2748 int active = ev_active (w);
2749
2750 prepares [active - 1] = prepares [--preparecnt];
2751 ev_active (prepares [active - 1]) = active;
2752 }
2753
2754 ev_stop (EV_A_ (W)w);
2755
2756 EV_FREQUENT_CHECK;
2757}
2758
2759void
2760ev_check_start (EV_P_ ev_check *w)
2761{
2762 if (expect_false (ev_is_active (w)))
2763 return;
2764
2765 EV_FREQUENT_CHECK;
2766
791 ev_start ((W)w, ++checkcnt); 2767 ev_start (EV_A_ (W)w, ++checkcnt);
792 array_needsize (checks, checkmax, checkcnt, ); 2768 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
793 checks [checkcnt - 1] = w; 2769 checks [checkcnt - 1] = w;
794}
795 2770
2771 EV_FREQUENT_CHECK;
2772}
2773
2774void
796void evcheck_stop (struct ev_check *w) 2775ev_check_stop (EV_P_ ev_check *w)
797{ 2776{
2777 clear_pending (EV_A_ (W)w);
2778 if (expect_false (!ev_is_active (w)))
2779 return;
2780
2781 EV_FREQUENT_CHECK;
2782
2783 {
2784 int active = ev_active (w);
2785
798 checks [w->active - 1] = checks [--checkcnt]; 2786 checks [active - 1] = checks [--checkcnt];
2787 ev_active (checks [active - 1]) = active;
2788 }
2789
799 ev_stop ((W)w); 2790 ev_stop (EV_A_ (W)w);
2791
2792 EV_FREQUENT_CHECK;
800} 2793}
2794
2795#if EV_EMBED_ENABLE
2796void noinline
2797ev_embed_sweep (EV_P_ ev_embed *w)
2798{
2799 ev_loop (w->other, EVLOOP_NONBLOCK);
2800}
2801
2802static void
2803embed_io_cb (EV_P_ ev_io *io, int revents)
2804{
2805 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2806
2807 if (ev_cb (w))
2808 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2809 else
2810 ev_loop (w->other, EVLOOP_NONBLOCK);
2811}
2812
2813static void
2814embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2815{
2816 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2817
2818 {
2819 struct ev_loop *loop = w->other;
2820
2821 while (fdchangecnt)
2822 {
2823 fd_reify (EV_A);
2824 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2825 }
2826 }
2827}
2828
2829#if 0
2830static void
2831embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2832{
2833 ev_idle_stop (EV_A_ idle);
2834}
2835#endif
2836
2837void
2838ev_embed_start (EV_P_ ev_embed *w)
2839{
2840 if (expect_false (ev_is_active (w)))
2841 return;
2842
2843 {
2844 struct ev_loop *loop = w->other;
2845 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2846 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2847 }
2848
2849 EV_FREQUENT_CHECK;
2850
2851 ev_set_priority (&w->io, ev_priority (w));
2852 ev_io_start (EV_A_ &w->io);
2853
2854 ev_prepare_init (&w->prepare, embed_prepare_cb);
2855 ev_set_priority (&w->prepare, EV_MINPRI);
2856 ev_prepare_start (EV_A_ &w->prepare);
2857
2858 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2859
2860 ev_start (EV_A_ (W)w, 1);
2861
2862 EV_FREQUENT_CHECK;
2863}
2864
2865void
2866ev_embed_stop (EV_P_ ev_embed *w)
2867{
2868 clear_pending (EV_A_ (W)w);
2869 if (expect_false (!ev_is_active (w)))
2870 return;
2871
2872 EV_FREQUENT_CHECK;
2873
2874 ev_io_stop (EV_A_ &w->io);
2875 ev_prepare_stop (EV_A_ &w->prepare);
2876
2877 ev_stop (EV_A_ (W)w);
2878
2879 EV_FREQUENT_CHECK;
2880}
2881#endif
2882
2883#if EV_FORK_ENABLE
2884void
2885ev_fork_start (EV_P_ ev_fork *w)
2886{
2887 if (expect_false (ev_is_active (w)))
2888 return;
2889
2890 EV_FREQUENT_CHECK;
2891
2892 ev_start (EV_A_ (W)w, ++forkcnt);
2893 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2894 forks [forkcnt - 1] = w;
2895
2896 EV_FREQUENT_CHECK;
2897}
2898
2899void
2900ev_fork_stop (EV_P_ ev_fork *w)
2901{
2902 clear_pending (EV_A_ (W)w);
2903 if (expect_false (!ev_is_active (w)))
2904 return;
2905
2906 EV_FREQUENT_CHECK;
2907
2908 {
2909 int active = ev_active (w);
2910
2911 forks [active - 1] = forks [--forkcnt];
2912 ev_active (forks [active - 1]) = active;
2913 }
2914
2915 ev_stop (EV_A_ (W)w);
2916
2917 EV_FREQUENT_CHECK;
2918}
2919#endif
2920
2921#if EV_ASYNC_ENABLE
2922void
2923ev_async_start (EV_P_ ev_async *w)
2924{
2925 if (expect_false (ev_is_active (w)))
2926 return;
2927
2928 evpipe_init (EV_A);
2929
2930 EV_FREQUENT_CHECK;
2931
2932 ev_start (EV_A_ (W)w, ++asynccnt);
2933 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2934 asyncs [asynccnt - 1] = w;
2935
2936 EV_FREQUENT_CHECK;
2937}
2938
2939void
2940ev_async_stop (EV_P_ ev_async *w)
2941{
2942 clear_pending (EV_A_ (W)w);
2943 if (expect_false (!ev_is_active (w)))
2944 return;
2945
2946 EV_FREQUENT_CHECK;
2947
2948 {
2949 int active = ev_active (w);
2950
2951 asyncs [active - 1] = asyncs [--asynccnt];
2952 ev_active (asyncs [active - 1]) = active;
2953 }
2954
2955 ev_stop (EV_A_ (W)w);
2956
2957 EV_FREQUENT_CHECK;
2958}
2959
2960void
2961ev_async_send (EV_P_ ev_async *w)
2962{
2963 w->sent = 1;
2964 evpipe_write (EV_A_ &gotasync);
2965}
2966#endif
801 2967
802/*****************************************************************************/ 2968/*****************************************************************************/
803 2969
804#if 0 2970struct ev_once
805 2971{
806struct ev_io wio; 2972 ev_io io;
2973 ev_timer to;
2974 void (*cb)(int revents, void *arg);
2975 void *arg;
2976};
807 2977
808static void 2978static void
809sin_cb (struct ev_io *w, int revents) 2979once_cb (EV_P_ struct ev_once *once, int revents)
810{ 2980{
811 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 2981 void (*cb)(int revents, void *arg) = once->cb;
2982 void *arg = once->arg;
2983
2984 ev_io_stop (EV_A_ &once->io);
2985 ev_timer_stop (EV_A_ &once->to);
2986 ev_free (once);
2987
2988 cb (revents, arg);
812} 2989}
813 2990
814static void 2991static void
815ocb (struct ev_timer *w, int revents) 2992once_cb_io (EV_P_ ev_io *w, int revents)
816{ 2993{
817 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 2994 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
818 evtimer_stop (w);
819 evtimer_start (w);
820} 2995}
821 2996
822static void 2997static void
823scb (struct ev_signal *w, int revents) 2998once_cb_to (EV_P_ ev_timer *w, int revents)
824{ 2999{
825 fprintf (stderr, "signal %x,%d\n", revents, w->signum); 3000 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
826 evio_stop (&wio);
827 evio_start (&wio);
828} 3001}
829 3002
830static void 3003void
831gcb (struct ev_signal *w, int revents) 3004ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
832{ 3005{
833 fprintf (stderr, "generic %x\n", revents); 3006 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
834 3007
835} 3008 if (expect_false (!once))
836
837int main (void)
838{
839 ev_init (0);
840
841 evio_init (&wio, sin_cb, 0, EV_READ);
842 evio_start (&wio);
843
844 struct ev_timer t[10000];
845
846#if 0
847 int i;
848 for (i = 0; i < 10000; ++i)
849 {
850 struct ev_timer *w = t + i;
851 evw_init (w, ocb, i);
852 evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
853 evtimer_start (w);
854 if (drand48 () < 0.5)
855 evtimer_stop (w);
856 } 3009 {
857#endif 3010 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
858
859 struct ev_timer t1;
860 evtimer_init (&t1, ocb, 5, 10);
861 evtimer_start (&t1);
862
863 struct ev_signal sig;
864 evsignal_init (&sig, scb, SIGQUIT);
865 evsignal_start (&sig);
866
867 struct ev_check cw;
868 evcheck_init (&cw, gcb);
869 evcheck_start (&cw);
870
871 struct ev_idle iw;
872 evidle_init (&iw, gcb);
873 evidle_start (&iw);
874
875 ev_loop (0);
876
877 return 0; 3011 return;
878} 3012 }
879 3013
880#endif 3014 once->cb = cb;
3015 once->arg = arg;
881 3016
3017 ev_init (&once->io, once_cb_io);
3018 if (fd >= 0)
3019 {
3020 ev_io_set (&once->io, fd, events);
3021 ev_io_start (EV_A_ &once->io);
3022 }
882 3023
3024 ev_init (&once->to, once_cb_to);
3025 if (timeout >= 0.)
3026 {
3027 ev_timer_set (&once->to, timeout, 0.);
3028 ev_timer_start (EV_A_ &once->to);
3029 }
3030}
883 3031
3032#if EV_MULTIPLICITY
3033 #include "ev_wrap.h"
3034#endif
884 3035
3036#ifdef __cplusplus
3037}
3038#endif
3039

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