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Comparing libev/ev.c (file contents):
Revision 1.21 by root, Wed Oct 31 18:37:38 2007 UTC vs.
Revision 1.249 by root, Wed May 21 23:30:52 2008 UTC

1/* 1/*
2 * libev event processing core, watcher management
3 *
2 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
3 * All rights reserved. 5 * All rights reserved.
4 * 6 *
5 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
6 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
7 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
8 * 27 *
9 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
10 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
11 * 30 * in which case the provisions of the GPL are applicable instead of
12 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
13 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
14 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
15 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
16 * 35 * and other provisions required by the GPL. If you do not delete the
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */ 38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC
54# define EV_USE_MONOTONIC 1
55# endif
56# ifndef EV_USE_REALTIME
57# define EV_USE_REALTIME 1
58# endif
59# else
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0
62# endif
63# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0
65# endif
66# endif
67
68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
73# endif
74# endif
75
76# ifndef EV_USE_SELECT
77# if HAVE_SELECT && HAVE_SYS_SELECT_H
78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif
82# endif
83
84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
86# define EV_USE_POLL 1
87# else
88# define EV_USE_POLL 0
89# endif
90# endif
91
92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94# define EV_USE_EPOLL 1
95# else
96# define EV_USE_EPOLL 0
97# endif
98# endif
99
100# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif
106# endif
107
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1
111# else
112# define EV_USE_PORT 0
113# endif
114# endif
115
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1
119# else
120# define EV_USE_INOTIFY 0
121# endif
122# endif
123
124# ifndef EV_USE_EVENTFD
125# if HAVE_EVENTFD
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif
130# endif
131
132#endif
29 133
30#include <math.h> 134#include <math.h>
31#include <stdlib.h> 135#include <stdlib.h>
32#include <unistd.h>
33#include <fcntl.h> 136#include <fcntl.h>
34#include <signal.h>
35#include <stddef.h> 137#include <stddef.h>
36 138
37#include <stdio.h> 139#include <stdio.h>
38 140
39#include <assert.h> 141#include <assert.h>
40#include <errno.h> 142#include <errno.h>
41#include <sys/time.h> 143#include <sys/types.h>
42#include <time.h> 144#include <time.h>
43 145
44#ifndef HAVE_MONOTONIC 146#include <signal.h>
45# ifdef CLOCK_MONOTONIC 147
46# define HAVE_MONOTONIC 1 148#ifdef EV_H
149# include EV_H
150#else
151# include "ev.h"
152#endif
153
154#ifndef _WIN32
155# include <sys/time.h>
156# include <sys/wait.h>
157# include <unistd.h>
158#else
159# define WIN32_LEAN_AND_MEAN
160# include <windows.h>
161# ifndef EV_SELECT_IS_WINSOCKET
162# define EV_SELECT_IS_WINSOCKET 1
47# endif 163# endif
48#endif 164#endif
49 165
166/* this block tries to deduce configuration from header-defined symbols and defaults */
167
168#ifndef EV_USE_MONOTONIC
169# define EV_USE_MONOTONIC 0
170#endif
171
172#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0
174#endif
175
176#ifndef EV_USE_NANOSLEEP
177# define EV_USE_NANOSLEEP 0
178#endif
179
50#ifndef HAVE_SELECT 180#ifndef EV_USE_SELECT
51# define HAVE_SELECT 1 181# define EV_USE_SELECT 1
182#endif
183
184#ifndef EV_USE_POLL
185# ifdef _WIN32
186# define EV_USE_POLL 0
187# else
188# define EV_USE_POLL 1
52#endif 189# endif
190#endif
53 191
54#ifndef HAVE_EPOLL 192#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1
195# else
55# define HAVE_EPOLL 0 196# define EV_USE_EPOLL 0
56#endif 197# endif
198#endif
57 199
58#ifndef HAVE_REALTIME 200#ifndef EV_USE_KQUEUE
59# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ 201# define EV_USE_KQUEUE 0
202#endif
203
204#ifndef EV_USE_PORT
205# define EV_USE_PORT 0
206#endif
207
208#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1
211# else
212# define EV_USE_INOTIFY 0
60#endif 213# endif
214#endif
215
216#ifndef EV_PID_HASHSIZE
217# if EV_MINIMAL
218# define EV_PID_HASHSIZE 1
219# else
220# define EV_PID_HASHSIZE 16
221# endif
222#endif
223
224#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL
226# define EV_INOTIFY_HASHSIZE 1
227# else
228# define EV_INOTIFY_HASHSIZE 16
229# endif
230#endif
231
232#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1
235# else
236# define EV_USE_EVENTFD 0
237# endif
238#endif
239
240#if 0 /* debugging */
241# define EV_VERIFY 1
242# define EV_USE_4HEAP 1
243# define EV_HEAP_CACHE_AT 1
244#endif
245
246#ifndef EV_USE_4HEAP
247# define EV_USE_4HEAP !EV_MINIMAL
248#endif
249
250#ifndef EV_HEAP_CACHE_AT
251# define EV_HEAP_CACHE_AT !EV_MINIMAL
252#endif
253
254/* this block fixes any misconfiguration where we know we run into trouble otherwise */
255
256#ifndef CLOCK_MONOTONIC
257# undef EV_USE_MONOTONIC
258# define EV_USE_MONOTONIC 0
259#endif
260
261#ifndef CLOCK_REALTIME
262# undef EV_USE_REALTIME
263# define EV_USE_REALTIME 0
264#endif
265
266#if !EV_STAT_ENABLE
267# undef EV_USE_INOTIFY
268# define EV_USE_INOTIFY 0
269#endif
270
271#if !EV_USE_NANOSLEEP
272# ifndef _WIN32
273# include <sys/select.h>
274# endif
275#endif
276
277#if EV_USE_INOTIFY
278# include <sys/inotify.h>
279#endif
280
281#if EV_SELECT_IS_WINSOCKET
282# include <winsock.h>
283#endif
284
285#if EV_USE_EVENTFD
286/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
287# include <stdint.h>
288# ifdef __cplusplus
289extern "C" {
290# endif
291int eventfd (unsigned int initval, int flags);
292# ifdef __cplusplus
293}
294# endif
295#endif
296
297/**/
298
299/* EV_VERIFY: enable internal consistency checks
300 * undefined or zero: no verification done or available
301 * 1 or higher: ev_loop_verify function available
302 * 2 or higher: ev_loop_verify is called frequently
303 */
304#if EV_VERIFY >= 1
305# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
306#else
307# define EV_FREQUENT_CHECK do { } while (0)
308#endif
309
310/*
311 * This is used to avoid floating point rounding problems.
312 * It is added to ev_rt_now when scheduling periodics
313 * to ensure progress, time-wise, even when rounding
314 * errors are against us.
315 * This value is good at least till the year 4000.
316 * Better solutions welcome.
317 */
318#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
61 319
62#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 320#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
63#define MAX_BLOCKTIME 60. 321#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
322/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
64 323
65#include "ev.h" 324#if __GNUC__ >= 4
325# define expect(expr,value) __builtin_expect ((expr),(value))
326# define noinline __attribute__ ((noinline))
327#else
328# define expect(expr,value) (expr)
329# define noinline
330# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
331# define inline
332# endif
333#endif
66 334
335#define expect_false(expr) expect ((expr) != 0, 0)
336#define expect_true(expr) expect ((expr) != 0, 1)
337#define inline_size static inline
338
339#if EV_MINIMAL
340# define inline_speed static noinline
341#else
342# define inline_speed static inline
343#endif
344
345#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
346#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
347
348#define EMPTY /* required for microsofts broken pseudo-c compiler */
349#define EMPTY2(a,b) /* used to suppress some warnings */
350
67typedef struct ev_watcher *W; 351typedef ev_watcher *W;
68typedef struct ev_watcher_list *WL; 352typedef ev_watcher_list *WL;
69typedef struct ev_watcher_time *WT; 353typedef ev_watcher_time *WT;
70 354
71static ev_tstamp now, diff; /* monotonic clock */ 355#define ev_active(w) ((W)(w))->active
356#define ev_at(w) ((WT)(w))->at
357
358#if EV_USE_MONOTONIC
359/* sig_atomic_t is used to avoid per-thread variables or locking but still */
360/* giving it a reasonably high chance of working on typical architetcures */
361static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
362#endif
363
364#ifdef _WIN32
365# include "ev_win32.c"
366#endif
367
368/*****************************************************************************/
369
370static void (*syserr_cb)(const char *msg);
371
372void
373ev_set_syserr_cb (void (*cb)(const char *msg))
374{
375 syserr_cb = cb;
376}
377
378static void noinline
379syserr (const char *msg)
380{
381 if (!msg)
382 msg = "(libev) system error";
383
384 if (syserr_cb)
385 syserr_cb (msg);
386 else
387 {
388 perror (msg);
389 abort ();
390 }
391}
392
393static void *
394ev_realloc_emul (void *ptr, long size)
395{
396 /* some systems, notably openbsd and darwin, fail to properly
397 * implement realloc (x, 0) (as required by both ansi c-98 and
398 * the single unix specification, so work around them here.
399 */
400
401 if (size)
402 return realloc (ptr, size);
403
404 free (ptr);
405 return 0;
406}
407
408static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
409
410void
411ev_set_allocator (void *(*cb)(void *ptr, long size))
412{
413 alloc = cb;
414}
415
416inline_speed void *
417ev_realloc (void *ptr, long size)
418{
419 ptr = alloc (ptr, size);
420
421 if (!ptr && size)
422 {
423 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
424 abort ();
425 }
426
427 return ptr;
428}
429
430#define ev_malloc(size) ev_realloc (0, (size))
431#define ev_free(ptr) ev_realloc ((ptr), 0)
432
433/*****************************************************************************/
434
435typedef struct
436{
437 WL head;
438 unsigned char events;
439 unsigned char reify;
440#if EV_SELECT_IS_WINSOCKET
441 SOCKET handle;
442#endif
443} ANFD;
444
445typedef struct
446{
447 W w;
448 int events;
449} ANPENDING;
450
451#if EV_USE_INOTIFY
452/* hash table entry per inotify-id */
453typedef struct
454{
455 WL head;
456} ANFS;
457#endif
458
459/* Heap Entry */
460#if EV_HEAP_CACHE_AT
461 typedef struct {
462 ev_tstamp at;
463 WT w;
464 } ANHE;
465
466 #define ANHE_w(he) (he).w /* access watcher, read-write */
467 #define ANHE_at(he) (he).at /* access cached at, read-only */
468 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
469#else
470 typedef WT ANHE;
471
472 #define ANHE_w(he) (he)
473 #define ANHE_at(he) (he)->at
474 #define ANHE_at_cache(he)
475#endif
476
477#if EV_MULTIPLICITY
478
479 struct ev_loop
480 {
481 ev_tstamp ev_rt_now;
482 #define ev_rt_now ((loop)->ev_rt_now)
483 #define VAR(name,decl) decl;
484 #include "ev_vars.h"
485 #undef VAR
486 };
487 #include "ev_wrap.h"
488
489 static struct ev_loop default_loop_struct;
490 struct ev_loop *ev_default_loop_ptr;
491
492#else
493
72ev_tstamp ev_now; 494 ev_tstamp ev_rt_now;
73int ev_method; 495 #define VAR(name,decl) static decl;
496 #include "ev_vars.h"
497 #undef VAR
74 498
75static int have_monotonic; /* runtime */ 499 static int ev_default_loop_ptr;
76 500
77static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 501#endif
78static void (*method_modify)(int fd, int oev, int nev);
79static void (*method_poll)(ev_tstamp timeout);
80 502
81/*****************************************************************************/ 503/*****************************************************************************/
82 504
83ev_tstamp 505ev_tstamp
84ev_time (void) 506ev_time (void)
85{ 507{
86#if HAVE_REALTIME 508#if EV_USE_REALTIME
87 struct timespec ts; 509 struct timespec ts;
88 clock_gettime (CLOCK_REALTIME, &ts); 510 clock_gettime (CLOCK_REALTIME, &ts);
89 return ts.tv_sec + ts.tv_nsec * 1e-9; 511 return ts.tv_sec + ts.tv_nsec * 1e-9;
90#else 512#else
91 struct timeval tv; 513 struct timeval tv;
92 gettimeofday (&tv, 0); 514 gettimeofday (&tv, 0);
93 return tv.tv_sec + tv.tv_usec * 1e-6; 515 return tv.tv_sec + tv.tv_usec * 1e-6;
94#endif 516#endif
95} 517}
96 518
97static ev_tstamp 519ev_tstamp inline_size
98get_clock (void) 520get_clock (void)
99{ 521{
100#if HAVE_MONOTONIC 522#if EV_USE_MONOTONIC
101 if (have_monotonic) 523 if (expect_true (have_monotonic))
102 { 524 {
103 struct timespec ts; 525 struct timespec ts;
104 clock_gettime (CLOCK_MONOTONIC, &ts); 526 clock_gettime (CLOCK_MONOTONIC, &ts);
105 return ts.tv_sec + ts.tv_nsec * 1e-9; 527 return ts.tv_sec + ts.tv_nsec * 1e-9;
106 } 528 }
107#endif 529#endif
108 530
109 return ev_time (); 531 return ev_time ();
110} 532}
111 533
112#define array_needsize(base,cur,cnt,init) \ 534#if EV_MULTIPLICITY
113 if ((cnt) > cur) \ 535ev_tstamp
114 { \ 536ev_now (EV_P)
115 int newcnt = cur ? cur << 1 : 16; \ 537{
116 base = realloc (base, sizeof (*base) * (newcnt)); \ 538 return ev_rt_now;
117 init (base + cur, newcnt - cur); \ 539}
118 cur = newcnt; \ 540#endif
541
542void
543ev_sleep (ev_tstamp delay)
544{
545 if (delay > 0.)
119 } 546 {
547#if EV_USE_NANOSLEEP
548 struct timespec ts;
549
550 ts.tv_sec = (time_t)delay;
551 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
552
553 nanosleep (&ts, 0);
554#elif defined(_WIN32)
555 Sleep ((unsigned long)(delay * 1e3));
556#else
557 struct timeval tv;
558
559 tv.tv_sec = (time_t)delay;
560 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
561
562 select (0, 0, 0, 0, &tv);
563#endif
564 }
565}
120 566
121/*****************************************************************************/ 567/*****************************************************************************/
122 568
569#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
570
571int inline_size
572array_nextsize (int elem, int cur, int cnt)
573{
574 int ncur = cur + 1;
575
576 do
577 ncur <<= 1;
578 while (cnt > ncur);
579
580 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
581 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
582 {
583 ncur *= elem;
584 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
585 ncur = ncur - sizeof (void *) * 4;
586 ncur /= elem;
587 }
588
589 return ncur;
590}
591
592static noinline void *
593array_realloc (int elem, void *base, int *cur, int cnt)
594{
595 *cur = array_nextsize (elem, *cur, cnt);
596 return ev_realloc (base, elem * *cur);
597}
598
599#define array_needsize(type,base,cur,cnt,init) \
600 if (expect_false ((cnt) > (cur))) \
601 { \
602 int ocur_ = (cur); \
603 (base) = (type *)array_realloc \
604 (sizeof (type), (base), &(cur), (cnt)); \
605 init ((base) + (ocur_), (cur) - ocur_); \
606 }
607
608#if 0
609#define array_slim(type,stem) \
610 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
611 { \
612 stem ## max = array_roundsize (stem ## cnt >> 1); \
613 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
614 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
615 }
616#endif
617
618#define array_free(stem, idx) \
619 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
620
621/*****************************************************************************/
622
623void noinline
624ev_feed_event (EV_P_ void *w, int revents)
625{
626 W w_ = (W)w;
627 int pri = ABSPRI (w_);
628
629 if (expect_false (w_->pending))
630 pendings [pri][w_->pending - 1].events |= revents;
631 else
632 {
633 w_->pending = ++pendingcnt [pri];
634 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
635 pendings [pri][w_->pending - 1].w = w_;
636 pendings [pri][w_->pending - 1].events = revents;
637 }
638}
639
640void inline_speed
641queue_events (EV_P_ W *events, int eventcnt, int type)
642{
643 int i;
644
645 for (i = 0; i < eventcnt; ++i)
646 ev_feed_event (EV_A_ events [i], type);
647}
648
649/*****************************************************************************/
650
651void inline_size
652anfds_init (ANFD *base, int count)
653{
654 while (count--)
655 {
656 base->head = 0;
657 base->events = EV_NONE;
658 base->reify = 0;
659
660 ++base;
661 }
662}
663
664void inline_speed
665fd_event (EV_P_ int fd, int revents)
666{
667 ANFD *anfd = anfds + fd;
668 ev_io *w;
669
670 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
671 {
672 int ev = w->events & revents;
673
674 if (ev)
675 ev_feed_event (EV_A_ (W)w, ev);
676 }
677}
678
679void
680ev_feed_fd_event (EV_P_ int fd, int revents)
681{
682 if (fd >= 0 && fd < anfdmax)
683 fd_event (EV_A_ fd, revents);
684}
685
686void inline_size
687fd_reify (EV_P)
688{
689 int i;
690
691 for (i = 0; i < fdchangecnt; ++i)
692 {
693 int fd = fdchanges [i];
694 ANFD *anfd = anfds + fd;
695 ev_io *w;
696
697 unsigned char events = 0;
698
699 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
700 events |= (unsigned char)w->events;
701
702#if EV_SELECT_IS_WINSOCKET
703 if (events)
704 {
705 unsigned long argp;
706 #ifdef EV_FD_TO_WIN32_HANDLE
707 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
708 #else
709 anfd->handle = _get_osfhandle (fd);
710 #endif
711 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
712 }
713#endif
714
715 {
716 unsigned char o_events = anfd->events;
717 unsigned char o_reify = anfd->reify;
718
719 anfd->reify = 0;
720 anfd->events = events;
721
722 if (o_events != events || o_reify & EV_IOFDSET)
723 backend_modify (EV_A_ fd, o_events, events);
724 }
725 }
726
727 fdchangecnt = 0;
728}
729
730void inline_size
731fd_change (EV_P_ int fd, int flags)
732{
733 unsigned char reify = anfds [fd].reify;
734 anfds [fd].reify |= flags;
735
736 if (expect_true (!reify))
737 {
738 ++fdchangecnt;
739 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
740 fdchanges [fdchangecnt - 1] = fd;
741 }
742}
743
744void inline_speed
745fd_kill (EV_P_ int fd)
746{
747 ev_io *w;
748
749 while ((w = (ev_io *)anfds [fd].head))
750 {
751 ev_io_stop (EV_A_ w);
752 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
753 }
754}
755
756int inline_size
757fd_valid (int fd)
758{
759#ifdef _WIN32
760 return _get_osfhandle (fd) != -1;
761#else
762 return fcntl (fd, F_GETFD) != -1;
763#endif
764}
765
766/* called on EBADF to verify fds */
767static void noinline
768fd_ebadf (EV_P)
769{
770 int fd;
771
772 for (fd = 0; fd < anfdmax; ++fd)
773 if (anfds [fd].events)
774 if (!fd_valid (fd) == -1 && errno == EBADF)
775 fd_kill (EV_A_ fd);
776}
777
778/* called on ENOMEM in select/poll to kill some fds and retry */
779static void noinline
780fd_enomem (EV_P)
781{
782 int fd;
783
784 for (fd = anfdmax; fd--; )
785 if (anfds [fd].events)
786 {
787 fd_kill (EV_A_ fd);
788 return;
789 }
790}
791
792/* usually called after fork if backend needs to re-arm all fds from scratch */
793static void noinline
794fd_rearm_all (EV_P)
795{
796 int fd;
797
798 for (fd = 0; fd < anfdmax; ++fd)
799 if (anfds [fd].events)
800 {
801 anfds [fd].events = 0;
802 fd_change (EV_A_ fd, EV_IOFDSET | 1);
803 }
804}
805
806/*****************************************************************************/
807
808/*
809 * the heap functions want a real array index. array index 0 uis guaranteed to not
810 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
811 * the branching factor of the d-tree.
812 */
813
814/*
815 * at the moment we allow libev the luxury of two heaps,
816 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
817 * which is more cache-efficient.
818 * the difference is about 5% with 50000+ watchers.
819 */
820#if EV_USE_4HEAP
821
822#define DHEAP 4
823#define HEAP0 (DHEAP - 1) /* index of first element in heap */
824#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
825#define UPHEAP_DONE(p,k) ((p) == (k))
826
827/* away from the root */
828void inline_speed
829downheap (ANHE *heap, int N, int k)
830{
831 ANHE he = heap [k];
832 ANHE *E = heap + N + HEAP0;
833
834 for (;;)
835 {
836 ev_tstamp minat;
837 ANHE *minpos;
838 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
839
840 /* find minimum child */
841 if (expect_true (pos + DHEAP - 1 < E))
842 {
843 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
844 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
845 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
846 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
847 }
848 else if (pos < E)
849 {
850 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
851 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
852 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
853 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
854 }
855 else
856 break;
857
858 if (ANHE_at (he) <= minat)
859 break;
860
861 heap [k] = *minpos;
862 ev_active (ANHE_w (*minpos)) = k;
863
864 k = minpos - heap;
865 }
866
867 heap [k] = he;
868 ev_active (ANHE_w (he)) = k;
869}
870
871#else /* 4HEAP */
872
873#define HEAP0 1
874#define HPARENT(k) ((k) >> 1)
875#define UPHEAP_DONE(p,k) (!(p))
876
877/* away from the root */
878void inline_speed
879downheap (ANHE *heap, int N, int k)
880{
881 ANHE he = heap [k];
882
883 for (;;)
884 {
885 int c = k << 1;
886
887 if (c > N + HEAP0 - 1)
888 break;
889
890 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
891 ? 1 : 0;
892
893 if (ANHE_at (he) <= ANHE_at (heap [c]))
894 break;
895
896 heap [k] = heap [c];
897 ev_active (ANHE_w (heap [k])) = k;
898
899 k = c;
900 }
901
902 heap [k] = he;
903 ev_active (ANHE_w (he)) = k;
904}
905#endif
906
907/* towards the root */
908void inline_speed
909upheap (ANHE *heap, int k)
910{
911 ANHE he = heap [k];
912
913 for (;;)
914 {
915 int p = HPARENT (k);
916
917 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
918 break;
919
920 heap [k] = heap [p];
921 ev_active (ANHE_w (heap [k])) = k;
922 k = p;
923 }
924
925 heap [k] = he;
926 ev_active (ANHE_w (he)) = k;
927}
928
929void inline_size
930adjustheap (ANHE *heap, int N, int k)
931{
932 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
933 upheap (heap, k);
934 else
935 downheap (heap, N, k);
936}
937
938/* rebuild the heap: this function is used only once and executed rarely */
939void inline_size
940reheap (ANHE *heap, int N)
941{
942 int i;
943 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
944 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
945 for (i = 0; i < N; ++i)
946 upheap (heap, i + HEAP0);
947}
948
949#if EV_VERIFY
950static void
951checkheap (ANHE *heap, int N)
952{
953 int i;
954
955 for (i = HEAP0; i < N + HEAP0; ++i)
956 {
957 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
958 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
959 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
960 }
961}
962#endif
963
964/*****************************************************************************/
965
123typedef struct 966typedef struct
124{ 967{
125 struct ev_io *head; 968 WL head;
126 unsigned char wev, rev; /* want, received event set */ 969 EV_ATOMIC_T gotsig;
127} ANFD;
128
129static ANFD *anfds;
130static int anfdmax;
131
132static int *fdchanges;
133static int fdchangemax, fdchangecnt;
134
135static void
136anfds_init (ANFD *base, int count)
137{
138 while (count--)
139 {
140 base->head = 0;
141 base->wev = base->rev = EV_NONE;
142 ++base;
143 }
144}
145
146typedef struct
147{
148 W w;
149 int events;
150} ANPENDING;
151
152static ANPENDING *pendings;
153static int pendingmax, pendingcnt;
154
155static void
156event (W w, int events)
157{
158 if (w->active)
159 {
160 w->pending = ++pendingcnt;
161 array_needsize (pendings, pendingmax, pendingcnt, );
162 pendings [pendingcnt - 1].w = w;
163 pendings [pendingcnt - 1].events = events;
164 }
165}
166
167static void
168fd_event (int fd, int events)
169{
170 ANFD *anfd = anfds + fd;
171 struct ev_io *w;
172
173 for (w = anfd->head; w; w = w->next)
174 {
175 int ev = w->events & events;
176
177 if (ev)
178 event ((W)w, ev);
179 }
180}
181
182static void
183queue_events (W *events, int eventcnt, int type)
184{
185 int i;
186
187 for (i = 0; i < eventcnt; ++i)
188 event (events [i], type);
189}
190
191/* called on EBADF to verify fds */
192static void
193fd_recheck ()
194{
195 int fd;
196
197 for (fd = 0; fd < anfdmax; ++fd)
198 if (anfds [fd].wev)
199 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
200 while (anfds [fd].head)
201 evio_stop (anfds [fd].head);
202}
203
204/*****************************************************************************/
205
206static struct ev_timer **timers;
207static int timermax, timercnt;
208
209static struct ev_periodic **periodics;
210static int periodicmax, periodiccnt;
211
212static void
213upheap (WT *timers, int k)
214{
215 WT w = timers [k];
216
217 while (k && timers [k >> 1]->at > w->at)
218 {
219 timers [k] = timers [k >> 1];
220 timers [k]->active = k + 1;
221 k >>= 1;
222 }
223
224 timers [k] = w;
225 timers [k]->active = k + 1;
226
227}
228
229static void
230downheap (WT *timers, int N, int k)
231{
232 WT w = timers [k];
233
234 while (k < (N >> 1))
235 {
236 int j = k << 1;
237
238 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
239 ++j;
240
241 if (w->at <= timers [j]->at)
242 break;
243
244 timers [k] = timers [j];
245 timers [k]->active = k + 1;
246 k = j;
247 }
248
249 timers [k] = w;
250 timers [k]->active = k + 1;
251}
252
253/*****************************************************************************/
254
255typedef struct
256{
257 struct ev_signal *head;
258 sig_atomic_t gotsig;
259} ANSIG; 970} ANSIG;
260 971
261static ANSIG *signals; 972static ANSIG *signals;
262static int signalmax; 973static int signalmax;
263 974
264static int sigpipe [2]; 975static EV_ATOMIC_T gotsig;
265static sig_atomic_t gotsig;
266static struct ev_io sigev;
267 976
268static void 977void inline_size
269signals_init (ANSIG *base, int count) 978signals_init (ANSIG *base, int count)
270{ 979{
271 while (count--) 980 while (count--)
272 { 981 {
273 base->head = 0; 982 base->head = 0;
274 base->gotsig = 0; 983 base->gotsig = 0;
984
275 ++base; 985 ++base;
276 } 986 }
277} 987}
278 988
989/*****************************************************************************/
990
991void inline_speed
992fd_intern (int fd)
993{
994#ifdef _WIN32
995 int arg = 1;
996 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
997#else
998 fcntl (fd, F_SETFD, FD_CLOEXEC);
999 fcntl (fd, F_SETFL, O_NONBLOCK);
1000#endif
1001}
1002
1003static void noinline
1004evpipe_init (EV_P)
1005{
1006 if (!ev_is_active (&pipeev))
1007 {
1008#if EV_USE_EVENTFD
1009 if ((evfd = eventfd (0, 0)) >= 0)
1010 {
1011 evpipe [0] = -1;
1012 fd_intern (evfd);
1013 ev_io_set (&pipeev, evfd, EV_READ);
1014 }
1015 else
1016#endif
1017 {
1018 while (pipe (evpipe))
1019 syserr ("(libev) error creating signal/async pipe");
1020
1021 fd_intern (evpipe [0]);
1022 fd_intern (evpipe [1]);
1023 ev_io_set (&pipeev, evpipe [0], EV_READ);
1024 }
1025
1026 ev_io_start (EV_A_ &pipeev);
1027 ev_unref (EV_A); /* watcher should not keep loop alive */
1028 }
1029}
1030
1031void inline_size
1032evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1033{
1034 if (!*flag)
1035 {
1036 int old_errno = errno; /* save errno because write might clobber it */
1037
1038 *flag = 1;
1039
1040#if EV_USE_EVENTFD
1041 if (evfd >= 0)
1042 {
1043 uint64_t counter = 1;
1044 write (evfd, &counter, sizeof (uint64_t));
1045 }
1046 else
1047#endif
1048 write (evpipe [1], &old_errno, 1);
1049
1050 errno = old_errno;
1051 }
1052}
1053
279static void 1054static void
1055pipecb (EV_P_ ev_io *iow, int revents)
1056{
1057#if EV_USE_EVENTFD
1058 if (evfd >= 0)
1059 {
1060 uint64_t counter;
1061 read (evfd, &counter, sizeof (uint64_t));
1062 }
1063 else
1064#endif
1065 {
1066 char dummy;
1067 read (evpipe [0], &dummy, 1);
1068 }
1069
1070 if (gotsig && ev_is_default_loop (EV_A))
1071 {
1072 int signum;
1073 gotsig = 0;
1074
1075 for (signum = signalmax; signum--; )
1076 if (signals [signum].gotsig)
1077 ev_feed_signal_event (EV_A_ signum + 1);
1078 }
1079
1080#if EV_ASYNC_ENABLE
1081 if (gotasync)
1082 {
1083 int i;
1084 gotasync = 0;
1085
1086 for (i = asynccnt; i--; )
1087 if (asyncs [i]->sent)
1088 {
1089 asyncs [i]->sent = 0;
1090 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1091 }
1092 }
1093#endif
1094}
1095
1096/*****************************************************************************/
1097
1098static void
280sighandler (int signum) 1099ev_sighandler (int signum)
281{ 1100{
1101#if EV_MULTIPLICITY
1102 struct ev_loop *loop = &default_loop_struct;
1103#endif
1104
1105#if _WIN32
1106 signal (signum, ev_sighandler);
1107#endif
1108
282 signals [signum - 1].gotsig = 1; 1109 signals [signum - 1].gotsig = 1;
1110 evpipe_write (EV_A_ &gotsig);
1111}
283 1112
284 if (!gotsig) 1113void noinline
1114ev_feed_signal_event (EV_P_ int signum)
1115{
1116 WL w;
1117
1118#if EV_MULTIPLICITY
1119 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1120#endif
1121
1122 --signum;
1123
1124 if (signum < 0 || signum >= signalmax)
1125 return;
1126
1127 signals [signum].gotsig = 0;
1128
1129 for (w = signals [signum].head; w; w = w->next)
1130 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1131}
1132
1133/*****************************************************************************/
1134
1135static WL childs [EV_PID_HASHSIZE];
1136
1137#ifndef _WIN32
1138
1139static ev_signal childev;
1140
1141#ifndef WIFCONTINUED
1142# define WIFCONTINUED(status) 0
1143#endif
1144
1145void inline_speed
1146child_reap (EV_P_ int chain, int pid, int status)
1147{
1148 ev_child *w;
1149 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1150
1151 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1152 {
1153 if ((w->pid == pid || !w->pid)
1154 && (!traced || (w->flags & 1)))
1155 {
1156 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1157 w->rpid = pid;
1158 w->rstatus = status;
1159 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1160 }
1161 }
1162}
1163
1164#ifndef WCONTINUED
1165# define WCONTINUED 0
1166#endif
1167
1168static void
1169childcb (EV_P_ ev_signal *sw, int revents)
1170{
1171 int pid, status;
1172
1173 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1174 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1175 if (!WCONTINUED
1176 || errno != EINVAL
1177 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1178 return;
1179
1180 /* make sure we are called again until all children have been reaped */
1181 /* we need to do it this way so that the callback gets called before we continue */
1182 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1183
1184 child_reap (EV_A_ pid, pid, status);
1185 if (EV_PID_HASHSIZE > 1)
1186 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1187}
1188
1189#endif
1190
1191/*****************************************************************************/
1192
1193#if EV_USE_PORT
1194# include "ev_port.c"
1195#endif
1196#if EV_USE_KQUEUE
1197# include "ev_kqueue.c"
1198#endif
1199#if EV_USE_EPOLL
1200# include "ev_epoll.c"
1201#endif
1202#if EV_USE_POLL
1203# include "ev_poll.c"
1204#endif
1205#if EV_USE_SELECT
1206# include "ev_select.c"
1207#endif
1208
1209int
1210ev_version_major (void)
1211{
1212 return EV_VERSION_MAJOR;
1213}
1214
1215int
1216ev_version_minor (void)
1217{
1218 return EV_VERSION_MINOR;
1219}
1220
1221/* return true if we are running with elevated privileges and should ignore env variables */
1222int inline_size
1223enable_secure (void)
1224{
1225#ifdef _WIN32
1226 return 0;
1227#else
1228 return getuid () != geteuid ()
1229 || getgid () != getegid ();
1230#endif
1231}
1232
1233unsigned int
1234ev_supported_backends (void)
1235{
1236 unsigned int flags = 0;
1237
1238 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1239 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1240 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1241 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1242 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1243
1244 return flags;
1245}
1246
1247unsigned int
1248ev_recommended_backends (void)
1249{
1250 unsigned int flags = ev_supported_backends ();
1251
1252#ifndef __NetBSD__
1253 /* kqueue is borked on everything but netbsd apparently */
1254 /* it usually doesn't work correctly on anything but sockets and pipes */
1255 flags &= ~EVBACKEND_KQUEUE;
1256#endif
1257#ifdef __APPLE__
1258 // flags &= ~EVBACKEND_KQUEUE; for documentation
1259 flags &= ~EVBACKEND_POLL;
1260#endif
1261
1262 return flags;
1263}
1264
1265unsigned int
1266ev_embeddable_backends (void)
1267{
1268 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1269
1270 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1271 /* please fix it and tell me how to detect the fix */
1272 flags &= ~EVBACKEND_EPOLL;
1273
1274 return flags;
1275}
1276
1277unsigned int
1278ev_backend (EV_P)
1279{
1280 return backend;
1281}
1282
1283unsigned int
1284ev_loop_count (EV_P)
1285{
1286 return loop_count;
1287}
1288
1289void
1290ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1291{
1292 io_blocktime = interval;
1293}
1294
1295void
1296ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1297{
1298 timeout_blocktime = interval;
1299}
1300
1301static void noinline
1302loop_init (EV_P_ unsigned int flags)
1303{
1304 if (!backend)
1305 {
1306#if EV_USE_MONOTONIC
285 { 1307 {
1308 struct timespec ts;
1309 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1310 have_monotonic = 1;
1311 }
1312#endif
1313
1314 ev_rt_now = ev_time ();
1315 mn_now = get_clock ();
1316 now_floor = mn_now;
1317 rtmn_diff = ev_rt_now - mn_now;
1318
1319 io_blocktime = 0.;
1320 timeout_blocktime = 0.;
1321 backend = 0;
1322 backend_fd = -1;
1323 gotasync = 0;
1324#if EV_USE_INOTIFY
1325 fs_fd = -2;
1326#endif
1327
1328 /* pid check not overridable via env */
1329#ifndef _WIN32
1330 if (flags & EVFLAG_FORKCHECK)
1331 curpid = getpid ();
1332#endif
1333
1334 if (!(flags & EVFLAG_NOENV)
1335 && !enable_secure ()
1336 && getenv ("LIBEV_FLAGS"))
1337 flags = atoi (getenv ("LIBEV_FLAGS"));
1338
1339 if (!(flags & 0x0000ffffU))
1340 flags |= ev_recommended_backends ();
1341
1342#if EV_USE_PORT
1343 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1344#endif
1345#if EV_USE_KQUEUE
1346 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1347#endif
1348#if EV_USE_EPOLL
1349 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1350#endif
1351#if EV_USE_POLL
1352 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1353#endif
1354#if EV_USE_SELECT
1355 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1356#endif
1357
1358 ev_init (&pipeev, pipecb);
1359 ev_set_priority (&pipeev, EV_MAXPRI);
1360 }
1361}
1362
1363static void noinline
1364loop_destroy (EV_P)
1365{
1366 int i;
1367
1368 if (ev_is_active (&pipeev))
1369 {
1370 ev_ref (EV_A); /* signal watcher */
1371 ev_io_stop (EV_A_ &pipeev);
1372
1373#if EV_USE_EVENTFD
1374 if (evfd >= 0)
1375 close (evfd);
1376#endif
1377
1378 if (evpipe [0] >= 0)
1379 {
1380 close (evpipe [0]);
1381 close (evpipe [1]);
1382 }
1383 }
1384
1385#if EV_USE_INOTIFY
1386 if (fs_fd >= 0)
1387 close (fs_fd);
1388#endif
1389
1390 if (backend_fd >= 0)
1391 close (backend_fd);
1392
1393#if EV_USE_PORT
1394 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1395#endif
1396#if EV_USE_KQUEUE
1397 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1398#endif
1399#if EV_USE_EPOLL
1400 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1401#endif
1402#if EV_USE_POLL
1403 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1404#endif
1405#if EV_USE_SELECT
1406 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1407#endif
1408
1409 for (i = NUMPRI; i--; )
1410 {
1411 array_free (pending, [i]);
1412#if EV_IDLE_ENABLE
1413 array_free (idle, [i]);
1414#endif
1415 }
1416
1417 ev_free (anfds); anfdmax = 0;
1418
1419 /* have to use the microsoft-never-gets-it-right macro */
1420 array_free (fdchange, EMPTY);
1421 array_free (timer, EMPTY);
1422#if EV_PERIODIC_ENABLE
1423 array_free (periodic, EMPTY);
1424#endif
1425#if EV_FORK_ENABLE
1426 array_free (fork, EMPTY);
1427#endif
1428 array_free (prepare, EMPTY);
1429 array_free (check, EMPTY);
1430#if EV_ASYNC_ENABLE
1431 array_free (async, EMPTY);
1432#endif
1433
1434 backend = 0;
1435}
1436
1437#if EV_USE_INOTIFY
1438void inline_size infy_fork (EV_P);
1439#endif
1440
1441void inline_size
1442loop_fork (EV_P)
1443{
1444#if EV_USE_PORT
1445 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1446#endif
1447#if EV_USE_KQUEUE
1448 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1449#endif
1450#if EV_USE_EPOLL
1451 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1452#endif
1453#if EV_USE_INOTIFY
1454 infy_fork (EV_A);
1455#endif
1456
1457 if (ev_is_active (&pipeev))
1458 {
1459 /* this "locks" the handlers against writing to the pipe */
1460 /* while we modify the fd vars */
286 gotsig = 1; 1461 gotsig = 1;
287 write (sigpipe [1], &gotsig, 1); 1462#if EV_ASYNC_ENABLE
288 } 1463 gotasync = 1;
289} 1464#endif
290 1465
1466 ev_ref (EV_A);
1467 ev_io_stop (EV_A_ &pipeev);
1468
1469#if EV_USE_EVENTFD
1470 if (evfd >= 0)
1471 close (evfd);
1472#endif
1473
1474 if (evpipe [0] >= 0)
1475 {
1476 close (evpipe [0]);
1477 close (evpipe [1]);
1478 }
1479
1480 evpipe_init (EV_A);
1481 /* now iterate over everything, in case we missed something */
1482 pipecb (EV_A_ &pipeev, EV_READ);
1483 }
1484
1485 postfork = 0;
1486}
1487
1488#if EV_MULTIPLICITY
1489struct ev_loop *
1490ev_loop_new (unsigned int flags)
1491{
1492 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1493
1494 memset (loop, 0, sizeof (struct ev_loop));
1495
1496 loop_init (EV_A_ flags);
1497
1498 if (ev_backend (EV_A))
1499 return loop;
1500
1501 return 0;
1502}
1503
1504void
1505ev_loop_destroy (EV_P)
1506{
1507 loop_destroy (EV_A);
1508 ev_free (loop);
1509}
1510
1511void
1512ev_loop_fork (EV_P)
1513{
1514 postfork = 1; /* must be in line with ev_default_fork */
1515}
1516
1517#if EV_VERIFY
291static void 1518static void
292sigcb (struct ev_io *iow, int revents) 1519array_check (W **ws, int cnt)
293{ 1520{
294 struct ev_signal *w; 1521 while (cnt--)
1522 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1523}
1524
1525static void
1526ev_loop_verify (EV_P)
1527{
295 int sig; 1528 int i;
296 1529
297 gotsig = 0; 1530 checkheap (timers, timercnt);
298 read (sigpipe [0], &revents, 1); 1531#if EV_PERIODIC_ENABLE
1532 checkheap (periodics, periodiccnt);
1533#endif
299 1534
300 for (sig = signalmax; sig--; ) 1535#if EV_IDLE_ENABLE
301 if (signals [sig].gotsig) 1536 for (i = NUMPRI; i--; )
1537 array_check ((W **)idles [i], idlecnt [i]);
1538#endif
1539#if EV_FORK_ENABLE
1540 array_check ((W **)forks, forkcnt);
1541#endif
1542 array_check ((W **)prepares, preparecnt);
1543 array_check ((W **)checks, checkcnt);
1544#if EV_ASYNC_ENABLE
1545 array_check ((W **)asyncs, asynccnt);
1546#endif
1547}
1548#endif
1549
1550#endif
1551
1552#if EV_MULTIPLICITY
1553struct ev_loop *
1554ev_default_loop_init (unsigned int flags)
1555#else
1556int
1557ev_default_loop (unsigned int flags)
1558#endif
1559{
1560 if (!ev_default_loop_ptr)
1561 {
1562#if EV_MULTIPLICITY
1563 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1564#else
1565 ev_default_loop_ptr = 1;
1566#endif
1567
1568 loop_init (EV_A_ flags);
1569
1570 if (ev_backend (EV_A))
1571 {
1572#ifndef _WIN32
1573 ev_signal_init (&childev, childcb, SIGCHLD);
1574 ev_set_priority (&childev, EV_MAXPRI);
1575 ev_signal_start (EV_A_ &childev);
1576 ev_unref (EV_A); /* child watcher should not keep loop alive */
1577#endif
1578 }
1579 else
1580 ev_default_loop_ptr = 0;
1581 }
1582
1583 return ev_default_loop_ptr;
1584}
1585
1586void
1587ev_default_destroy (void)
1588{
1589#if EV_MULTIPLICITY
1590 struct ev_loop *loop = ev_default_loop_ptr;
1591#endif
1592
1593#ifndef _WIN32
1594 ev_ref (EV_A); /* child watcher */
1595 ev_signal_stop (EV_A_ &childev);
1596#endif
1597
1598 loop_destroy (EV_A);
1599}
1600
1601void
1602ev_default_fork (void)
1603{
1604#if EV_MULTIPLICITY
1605 struct ev_loop *loop = ev_default_loop_ptr;
1606#endif
1607
1608 if (backend)
1609 postfork = 1; /* must be in line with ev_loop_fork */
1610}
1611
1612/*****************************************************************************/
1613
1614void
1615ev_invoke (EV_P_ void *w, int revents)
1616{
1617 EV_CB_INVOKE ((W)w, revents);
1618}
1619
1620void inline_speed
1621call_pending (EV_P)
1622{
1623 int pri;
1624
1625 EV_FREQUENT_CHECK;
1626
1627 for (pri = NUMPRI; pri--; )
1628 while (pendingcnt [pri])
302 { 1629 {
303 signals [sig].gotsig = 0; 1630 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
304 1631
305 for (w = signals [sig].head; w; w = w->next) 1632 if (expect_true (p->w))
306 event ((W)w, EV_SIGNAL); 1633 {
1634 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1635
1636 p->w->pending = 0;
1637 EV_CB_INVOKE (p->w, p->events);
1638 }
307 } 1639 }
308}
309 1640
310static void 1641 EV_FREQUENT_CHECK;
311siginit (void)
312{
313 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315
316 /* rather than sort out wether we really need nb, set it */
317 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
319
320 evio_set (&sigev, sigpipe [0], EV_READ);
321 evio_start (&sigev);
322} 1642}
323 1643
324/*****************************************************************************/ 1644#if EV_IDLE_ENABLE
325 1645void inline_size
326static struct ev_idle **idles; 1646idle_reify (EV_P)
327static int idlemax, idlecnt;
328
329static struct ev_prepare **prepares;
330static int preparemax, preparecnt;
331
332static struct ev_check **checks;
333static int checkmax, checkcnt;
334
335/*****************************************************************************/
336
337#if HAVE_EPOLL
338# include "ev_epoll.c"
339#endif
340#if HAVE_SELECT
341# include "ev_select.c"
342#endif
343
344int ev_init (int flags)
345{ 1647{
346#if HAVE_MONOTONIC 1648 if (expect_false (idleall))
347 {
348 struct timespec ts;
349 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
350 have_monotonic = 1;
351 }
352#endif
353
354 ev_now = ev_time ();
355 now = get_clock ();
356 diff = ev_now - now;
357
358 if (pipe (sigpipe))
359 return 0;
360
361 ev_method = EVMETHOD_NONE;
362#if HAVE_EPOLL
363 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
364#endif
365#if HAVE_SELECT
366 if (ev_method == EVMETHOD_NONE) select_init (flags);
367#endif
368
369 if (ev_method)
370 {
371 evw_init (&sigev, sigcb);
372 siginit ();
373 } 1649 {
1650 int pri;
374 1651
375 return ev_method; 1652 for (pri = NUMPRI; pri--; )
376}
377
378/*****************************************************************************/
379
380void ev_prefork (void)
381{
382 /* nop */
383}
384
385void ev_postfork_parent (void)
386{
387 /* nop */
388}
389
390void ev_postfork_child (void)
391{
392#if HAVE_EPOLL
393 if (ev_method == EVMETHOD_EPOLL)
394 epoll_postfork_child ();
395#endif
396
397 evio_stop (&sigev);
398 close (sigpipe [0]);
399 close (sigpipe [1]);
400 pipe (sigpipe);
401 siginit ();
402}
403
404/*****************************************************************************/
405
406static void
407fd_reify (void)
408{
409 int i;
410
411 for (i = 0; i < fdchangecnt; ++i)
412 {
413 int fd = fdchanges [i];
414 ANFD *anfd = anfds + fd;
415 struct ev_io *w;
416
417 int wev = 0;
418
419 for (w = anfd->head; w; w = w->next)
420 wev |= w->events;
421
422 if (anfd->wev != wev)
423 { 1653 {
424 method_modify (fd, anfd->wev, wev); 1654 if (pendingcnt [pri])
425 anfd->wev = wev; 1655 break;
1656
1657 if (idlecnt [pri])
1658 {
1659 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1660 break;
1661 }
426 } 1662 }
427 } 1663 }
428
429 fdchangecnt = 0;
430} 1664}
1665#endif
431 1666
432static void 1667void inline_size
433call_pending ()
434{
435 while (pendingcnt)
436 {
437 ANPENDING *p = pendings + --pendingcnt;
438
439 if (p->w)
440 {
441 p->w->pending = 0;
442 p->w->cb (p->w, p->events);
443 }
444 }
445}
446
447static void
448timers_reify () 1668timers_reify (EV_P)
449{ 1669{
1670 EV_FREQUENT_CHECK;
1671
450 while (timercnt && timers [0]->at <= now) 1672 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
451 { 1673 {
452 struct ev_timer *w = timers [0]; 1674 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
453 1675
454 event ((W)w, EV_TIMEOUT); 1676 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
455 1677
456 /* first reschedule or stop timer */ 1678 /* first reschedule or stop timer */
457 if (w->repeat) 1679 if (w->repeat)
458 { 1680 {
459 w->at = now + w->repeat; 1681 ev_at (w) += w->repeat;
460 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1682 if (ev_at (w) < mn_now)
1683 ev_at (w) = mn_now;
1684
1685 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1686
1687 ANHE_at_cache (timers [HEAP0]);
461 downheap ((WT *)timers, timercnt, 0); 1688 downheap (timers, timercnt, HEAP0);
462 } 1689 }
463 else 1690 else
464 evtimer_stop (w); /* nonrepeating: stop timer */ 1691 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
465 }
466}
467 1692
468static void 1693 EV_FREQUENT_CHECK;
1694 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1695 }
1696}
1697
1698#if EV_PERIODIC_ENABLE
1699void inline_size
469periodics_reify () 1700periodics_reify (EV_P)
470{ 1701{
1702 EV_FREQUENT_CHECK;
471 while (periodiccnt && periodics [0]->at <= ev_now) 1703 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
472 { 1704 {
473 struct ev_periodic *w = periodics [0]; 1705 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1706
1707 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
474 1708
475 /* first reschedule or stop timer */ 1709 /* first reschedule or stop timer */
476 if (w->interval) 1710 if (w->reschedule_cb)
477 { 1711 {
478 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1712 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
479 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1713
1714 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1715
1716 ANHE_at_cache (periodics [HEAP0]);
480 downheap ((WT *)periodics, periodiccnt, 0); 1717 downheap (periodics, periodiccnt, HEAP0);
1718 EV_FREQUENT_CHECK;
1719 }
1720 else if (w->interval)
1721 {
1722 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1723 /* if next trigger time is not sufficiently in the future, put it there */
1724 /* this might happen because of floating point inexactness */
1725 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1726 {
1727 ev_at (w) += w->interval;
1728
1729 /* if interval is unreasonably low we might still have a time in the past */
1730 /* so correct this. this will make the periodic very inexact, but the user */
1731 /* has effectively asked to get triggered more often than possible */
1732 if (ev_at (w) < ev_rt_now)
1733 ev_at (w) = ev_rt_now;
1734 }
1735
1736 ANHE_at_cache (periodics [HEAP0]);
1737 downheap (periodics, periodiccnt, HEAP0);
481 } 1738 }
482 else 1739 else
483 evperiodic_stop (w); /* nonrepeating: stop timer */ 1740 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
484 1741
485 event ((W)w, EV_TIMEOUT); 1742 EV_FREQUENT_CHECK;
1743 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
486 } 1744 }
487} 1745}
488 1746
489static void 1747static void noinline
490periodics_reschedule (ev_tstamp diff) 1748periodics_reschedule (EV_P)
491{ 1749{
492 int i; 1750 int i;
493 1751
494 /* adjust periodics after time jump */ 1752 /* adjust periodics after time jump */
495 for (i = 0; i < periodiccnt; ++i) 1753 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
496 { 1754 {
497 struct ev_periodic *w = periodics [i]; 1755 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
498 1756
1757 if (w->reschedule_cb)
1758 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
499 if (w->interval) 1759 else if (w->interval)
1760 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1761
1762 ANHE_at_cache (periodics [i]);
1763 }
1764
1765 reheap (periodics, periodiccnt);
1766}
1767#endif
1768
1769void inline_speed
1770time_update (EV_P_ ev_tstamp max_block)
1771{
1772 int i;
1773
1774#if EV_USE_MONOTONIC
1775 if (expect_true (have_monotonic))
1776 {
1777 ev_tstamp odiff = rtmn_diff;
1778
1779 mn_now = get_clock ();
1780
1781 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1782 /* interpolate in the meantime */
1783 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
500 { 1784 {
501 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1785 ev_rt_now = rtmn_diff + mn_now;
1786 return;
1787 }
502 1788
503 if (fabs (diff) >= 1e-4) 1789 now_floor = mn_now;
1790 ev_rt_now = ev_time ();
1791
1792 /* loop a few times, before making important decisions.
1793 * on the choice of "4": one iteration isn't enough,
1794 * in case we get preempted during the calls to
1795 * ev_time and get_clock. a second call is almost guaranteed
1796 * to succeed in that case, though. and looping a few more times
1797 * doesn't hurt either as we only do this on time-jumps or
1798 * in the unlikely event of having been preempted here.
1799 */
1800 for (i = 4; --i; )
1801 {
1802 rtmn_diff = ev_rt_now - mn_now;
1803
1804 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1805 return; /* all is well */
1806
1807 ev_rt_now = ev_time ();
1808 mn_now = get_clock ();
1809 now_floor = mn_now;
1810 }
1811
1812# if EV_PERIODIC_ENABLE
1813 periodics_reschedule (EV_A);
1814# endif
1815 /* no timer adjustment, as the monotonic clock doesn't jump */
1816 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1817 }
1818 else
1819#endif
1820 {
1821 ev_rt_now = ev_time ();
1822
1823 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1824 {
1825#if EV_PERIODIC_ENABLE
1826 periodics_reschedule (EV_A);
1827#endif
1828 /* adjust timers. this is easy, as the offset is the same for all of them */
1829 for (i = 0; i < timercnt; ++i)
504 { 1830 {
505 evperiodic_stop (w); 1831 ANHE *he = timers + i + HEAP0;
506 evperiodic_start (w); 1832 ANHE_w (*he)->at += ev_rt_now - mn_now;
507 1833 ANHE_at_cache (*he);
508 i = 0; /* restart loop, inefficient, but time jumps should be rare */
509 } 1834 }
510 } 1835 }
511 }
512}
513 1836
514static void 1837 mn_now = ev_rt_now;
515time_update ()
516{
517 int i;
518
519 ev_now = ev_time ();
520
521 if (have_monotonic)
522 { 1838 }
523 ev_tstamp odiff = diff; 1839}
524 1840
525 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1841void
1842ev_ref (EV_P)
1843{
1844 ++activecnt;
1845}
1846
1847void
1848ev_unref (EV_P)
1849{
1850 --activecnt;
1851}
1852
1853static int loop_done;
1854
1855void
1856ev_loop (EV_P_ int flags)
1857{
1858 loop_done = EVUNLOOP_CANCEL;
1859
1860 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1861
1862 do
1863 {
1864#ifndef _WIN32
1865 if (expect_false (curpid)) /* penalise the forking check even more */
1866 if (expect_false (getpid () != curpid))
1867 {
1868 curpid = getpid ();
1869 postfork = 1;
1870 }
1871#endif
1872
1873#if EV_FORK_ENABLE
1874 /* we might have forked, so queue fork handlers */
1875 if (expect_false (postfork))
1876 if (forkcnt)
1877 {
1878 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1879 call_pending (EV_A);
1880 }
1881#endif
1882
1883 /* queue prepare watchers (and execute them) */
1884 if (expect_false (preparecnt))
526 { 1885 {
527 now = get_clock (); 1886 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
528 diff = ev_now - now; 1887 call_pending (EV_A);
529
530 if (fabs (odiff - diff) < MIN_TIMEJUMP)
531 return; /* all is well */
532
533 ev_now = ev_time ();
534 } 1888 }
535 1889
536 periodics_reschedule (diff - odiff); 1890 if (expect_false (!activecnt))
537 /* no timer adjustment, as the monotonic clock doesn't jump */ 1891 break;
538 }
539 else
540 {
541 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
542 {
543 periodics_reschedule (ev_now - now);
544 1892
545 /* adjust timers. this is easy, as the offset is the same for all */ 1893 /* we might have forked, so reify kernel state if necessary */
546 for (i = 0; i < timercnt; ++i) 1894 if (expect_false (postfork))
547 timers [i]->at += diff; 1895 loop_fork (EV_A);
548 }
549
550 now = ev_now;
551 }
552}
553
554int ev_loop_done;
555
556void ev_loop (int flags)
557{
558 double block;
559 ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
560
561 do
562 {
563 /* queue check watchers (and execute them) */
564 if (preparecnt)
565 {
566 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
567 call_pending ();
568 }
569 1896
570 /* update fd-related kernel structures */ 1897 /* update fd-related kernel structures */
571 fd_reify (); 1898 fd_reify (EV_A);
572 1899
573 /* calculate blocking time */ 1900 /* calculate blocking time */
1901 {
1902 ev_tstamp waittime = 0.;
1903 ev_tstamp sleeptime = 0.;
574 1904
575 /* we only need this for !monotonic clockor timers, but as we basically 1905 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
576 always have timers, we just calculate it always */
577 ev_now = ev_time ();
578
579 if (flags & EVLOOP_NONBLOCK || idlecnt)
580 block = 0.;
581 else
582 { 1906 {
1907 /* update time to cancel out callback processing overhead */
1908 time_update (EV_A_ 1e100);
1909
583 block = MAX_BLOCKTIME; 1910 waittime = MAX_BLOCKTIME;
584 1911
585 if (timercnt) 1912 if (timercnt)
586 { 1913 {
587 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 1914 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
588 if (block > to) block = to; 1915 if (waittime > to) waittime = to;
589 } 1916 }
590 1917
1918#if EV_PERIODIC_ENABLE
591 if (periodiccnt) 1919 if (periodiccnt)
592 { 1920 {
593 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1921 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
594 if (block > to) block = to; 1922 if (waittime > to) waittime = to;
595 } 1923 }
1924#endif
596 1925
597 if (block < 0.) block = 0.; 1926 if (expect_false (waittime < timeout_blocktime))
1927 waittime = timeout_blocktime;
1928
1929 sleeptime = waittime - backend_fudge;
1930
1931 if (expect_true (sleeptime > io_blocktime))
1932 sleeptime = io_blocktime;
1933
1934 if (sleeptime)
1935 {
1936 ev_sleep (sleeptime);
1937 waittime -= sleeptime;
1938 }
598 } 1939 }
599 1940
600 method_poll (block); 1941 ++loop_count;
1942 backend_poll (EV_A_ waittime);
601 1943
602 /* update ev_now, do magic */ 1944 /* update ev_rt_now, do magic */
603 time_update (); 1945 time_update (EV_A_ waittime + sleeptime);
1946 }
604 1947
605 /* queue pending timers and reschedule them */ 1948 /* queue pending timers and reschedule them */
606 timers_reify (); /* relative timers called last */ 1949 timers_reify (EV_A); /* relative timers called last */
1950#if EV_PERIODIC_ENABLE
607 periodics_reify (); /* absolute timers called first */ 1951 periodics_reify (EV_A); /* absolute timers called first */
1952#endif
608 1953
1954#if EV_IDLE_ENABLE
609 /* queue idle watchers unless io or timers are pending */ 1955 /* queue idle watchers unless other events are pending */
610 if (!pendingcnt) 1956 idle_reify (EV_A);
611 queue_events ((W *)idles, idlecnt, EV_IDLE); 1957#endif
612 1958
613 /* queue check watchers, to be executed first */ 1959 /* queue check watchers, to be executed first */
614 if (checkcnt) 1960 if (expect_false (checkcnt))
615 queue_events ((W *)checks, checkcnt, EV_CHECK); 1961 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
616 1962
617 call_pending (); 1963 call_pending (EV_A);
618 } 1964 }
619 while (!ev_loop_done); 1965 while (expect_true (
1966 activecnt
1967 && !loop_done
1968 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1969 ));
620 1970
621 if (ev_loop_done != 2) 1971 if (loop_done == EVUNLOOP_ONE)
1972 loop_done = EVUNLOOP_CANCEL;
1973}
1974
1975void
1976ev_unloop (EV_P_ int how)
1977{
622 ev_loop_done = 0; 1978 loop_done = how;
623} 1979}
624 1980
625/*****************************************************************************/ 1981/*****************************************************************************/
626 1982
627static void 1983void inline_size
628wlist_add (WL *head, WL elem) 1984wlist_add (WL *head, WL elem)
629{ 1985{
630 elem->next = *head; 1986 elem->next = *head;
631 *head = elem; 1987 *head = elem;
632} 1988}
633 1989
634static void 1990void inline_size
635wlist_del (WL *head, WL elem) 1991wlist_del (WL *head, WL elem)
636{ 1992{
637 while (*head) 1993 while (*head)
638 { 1994 {
639 if (*head == elem) 1995 if (*head == elem)
… …
644 2000
645 head = &(*head)->next; 2001 head = &(*head)->next;
646 } 2002 }
647} 2003}
648 2004
649static void 2005void inline_speed
650ev_clear (W w) 2006clear_pending (EV_P_ W w)
651{ 2007{
652 if (w->pending) 2008 if (w->pending)
653 { 2009 {
654 pendings [w->pending - 1].w = 0; 2010 pendings [ABSPRI (w)][w->pending - 1].w = 0;
655 w->pending = 0; 2011 w->pending = 0;
656 } 2012 }
657} 2013}
658 2014
659static void 2015int
2016ev_clear_pending (EV_P_ void *w)
2017{
2018 W w_ = (W)w;
2019 int pending = w_->pending;
2020
2021 if (expect_true (pending))
2022 {
2023 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2024 w_->pending = 0;
2025 p->w = 0;
2026 return p->events;
2027 }
2028 else
2029 return 0;
2030}
2031
2032void inline_size
2033pri_adjust (EV_P_ W w)
2034{
2035 int pri = w->priority;
2036 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2037 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2038 w->priority = pri;
2039}
2040
2041void inline_speed
660ev_start (W w, int active) 2042ev_start (EV_P_ W w, int active)
661{ 2043{
2044 pri_adjust (EV_A_ w);
662 w->active = active; 2045 w->active = active;
2046 ev_ref (EV_A);
663} 2047}
664 2048
665static void 2049void inline_size
666ev_stop (W w) 2050ev_stop (EV_P_ W w)
667{ 2051{
2052 ev_unref (EV_A);
668 w->active = 0; 2053 w->active = 0;
669} 2054}
670 2055
671/*****************************************************************************/ 2056/*****************************************************************************/
672 2057
673void 2058void noinline
674evio_start (struct ev_io *w) 2059ev_io_start (EV_P_ ev_io *w)
675{ 2060{
2061 int fd = w->fd;
2062
676 if (ev_is_active (w)) 2063 if (expect_false (ev_is_active (w)))
677 return; 2064 return;
678 2065
679 int fd = w->fd; 2066 assert (("ev_io_start called with negative fd", fd >= 0));
680 2067
2068 EV_FREQUENT_CHECK;
2069
681 ev_start ((W)w, 1); 2070 ev_start (EV_A_ (W)w, 1);
682 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2071 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
683 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2072 wlist_add (&anfds[fd].head, (WL)w);
684 2073
685 ++fdchangecnt; 2074 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
686 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 2075 w->events &= ~EV_IOFDSET;
687 fdchanges [fdchangecnt - 1] = fd;
688}
689 2076
690void 2077 EV_FREQUENT_CHECK;
2078}
2079
2080void noinline
691evio_stop (struct ev_io *w) 2081ev_io_stop (EV_P_ ev_io *w)
692{ 2082{
693 ev_clear ((W)w); 2083 clear_pending (EV_A_ (W)w);
694 if (!ev_is_active (w)) 2084 if (expect_false (!ev_is_active (w)))
695 return; 2085 return;
696 2086
2087 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2088
2089 EV_FREQUENT_CHECK;
2090
697 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2091 wlist_del (&anfds[w->fd].head, (WL)w);
698 ev_stop ((W)w); 2092 ev_stop (EV_A_ (W)w);
699 2093
700 ++fdchangecnt; 2094 fd_change (EV_A_ w->fd, 1);
701 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
702 fdchanges [fdchangecnt - 1] = w->fd;
703}
704 2095
705void 2096 EV_FREQUENT_CHECK;
2097}
2098
2099void noinline
706evtimer_start (struct ev_timer *w) 2100ev_timer_start (EV_P_ ev_timer *w)
707{ 2101{
708 if (ev_is_active (w)) 2102 if (expect_false (ev_is_active (w)))
709 return; 2103 return;
710 2104
711 w->at += now; 2105 ev_at (w) += mn_now;
712 2106
713 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 2107 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
714 2108
715 ev_start ((W)w, ++timercnt); 2109 EV_FREQUENT_CHECK;
716 array_needsize (timers, timermax, timercnt, );
717 timers [timercnt - 1] = w;
718 upheap ((WT *)timers, timercnt - 1);
719}
720 2110
721void 2111 ++timercnt;
2112 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2113 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2114 ANHE_w (timers [ev_active (w)]) = (WT)w;
2115 ANHE_at_cache (timers [ev_active (w)]);
2116 upheap (timers, ev_active (w));
2117
2118 EV_FREQUENT_CHECK;
2119
2120 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2121}
2122
2123void noinline
722evtimer_stop (struct ev_timer *w) 2124ev_timer_stop (EV_P_ ev_timer *w)
723{ 2125{
724 ev_clear ((W)w); 2126 clear_pending (EV_A_ (W)w);
725 if (!ev_is_active (w)) 2127 if (expect_false (!ev_is_active (w)))
726 return; 2128 return;
727 2129
728 if (w->active < timercnt--) 2130 EV_FREQUENT_CHECK;
2131
2132 {
2133 int active = ev_active (w);
2134
2135 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2136
2137 --timercnt;
2138
2139 if (expect_true (active < timercnt + HEAP0))
729 { 2140 {
730 timers [w->active - 1] = timers [timercnt]; 2141 timers [active] = timers [timercnt + HEAP0];
731 downheap ((WT *)timers, timercnt, w->active - 1); 2142 adjustheap (timers, timercnt, active);
732 } 2143 }
2144 }
733 2145
734 w->at = w->repeat; 2146 EV_FREQUENT_CHECK;
735 2147
2148 ev_at (w) -= mn_now;
2149
736 ev_stop ((W)w); 2150 ev_stop (EV_A_ (W)w);
737} 2151}
738 2152
739void 2153void noinline
740evtimer_again (struct ev_timer *w) 2154ev_timer_again (EV_P_ ev_timer *w)
741{ 2155{
2156 EV_FREQUENT_CHECK;
2157
742 if (ev_is_active (w)) 2158 if (ev_is_active (w))
743 { 2159 {
744 if (w->repeat) 2160 if (w->repeat)
745 { 2161 {
746 w->at = now + w->repeat; 2162 ev_at (w) = mn_now + w->repeat;
2163 ANHE_at_cache (timers [ev_active (w)]);
747 downheap ((WT *)timers, timercnt, w->active - 1); 2164 adjustheap (timers, timercnt, ev_active (w));
748 } 2165 }
749 else 2166 else
750 evtimer_stop (w); 2167 ev_timer_stop (EV_A_ w);
751 } 2168 }
752 else if (w->repeat) 2169 else if (w->repeat)
2170 {
2171 ev_at (w) = w->repeat;
753 evtimer_start (w); 2172 ev_timer_start (EV_A_ w);
754} 2173 }
755 2174
756void 2175 EV_FREQUENT_CHECK;
2176}
2177
2178#if EV_PERIODIC_ENABLE
2179void noinline
757evperiodic_start (struct ev_periodic *w) 2180ev_periodic_start (EV_P_ ev_periodic *w)
758{ 2181{
759 if (ev_is_active (w)) 2182 if (expect_false (ev_is_active (w)))
760 return; 2183 return;
761 2184
762 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 2185 if (w->reschedule_cb)
763 2186 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2187 else if (w->interval)
2188 {
2189 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
764 /* this formula differs from the one in periodic_reify because we do not always round up */ 2190 /* this formula differs from the one in periodic_reify because we do not always round up */
765 if (w->interval)
766 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 2191 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2192 }
2193 else
2194 ev_at (w) = w->offset;
767 2195
2196 EV_FREQUENT_CHECK;
2197
2198 ++periodiccnt;
768 ev_start ((W)w, ++periodiccnt); 2199 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
769 array_needsize (periodics, periodicmax, periodiccnt, ); 2200 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
770 periodics [periodiccnt - 1] = w; 2201 ANHE_w (periodics [ev_active (w)]) = (WT)w;
771 upheap ((WT *)periodics, periodiccnt - 1); 2202 ANHE_at_cache (periodics [ev_active (w)]);
772} 2203 upheap (periodics, ev_active (w));
773 2204
774void 2205 EV_FREQUENT_CHECK;
2206
2207 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2208}
2209
2210void noinline
775evperiodic_stop (struct ev_periodic *w) 2211ev_periodic_stop (EV_P_ ev_periodic *w)
776{ 2212{
777 ev_clear ((W)w); 2213 clear_pending (EV_A_ (W)w);
778 if (!ev_is_active (w)) 2214 if (expect_false (!ev_is_active (w)))
779 return; 2215 return;
780 2216
781 if (w->active < periodiccnt--) 2217 EV_FREQUENT_CHECK;
2218
2219 {
2220 int active = ev_active (w);
2221
2222 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2223
2224 --periodiccnt;
2225
2226 if (expect_true (active < periodiccnt + HEAP0))
782 { 2227 {
783 periodics [w->active - 1] = periodics [periodiccnt]; 2228 periodics [active] = periodics [periodiccnt + HEAP0];
784 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2229 adjustheap (periodics, periodiccnt, active);
785 } 2230 }
2231 }
786 2232
2233 EV_FREQUENT_CHECK;
2234
787 ev_stop ((W)w); 2235 ev_stop (EV_A_ (W)w);
788} 2236}
789 2237
790void 2238void noinline
2239ev_periodic_again (EV_P_ ev_periodic *w)
2240{
2241 /* TODO: use adjustheap and recalculation */
2242 ev_periodic_stop (EV_A_ w);
2243 ev_periodic_start (EV_A_ w);
2244}
2245#endif
2246
2247#ifndef SA_RESTART
2248# define SA_RESTART 0
2249#endif
2250
2251void noinline
791evsignal_start (struct ev_signal *w) 2252ev_signal_start (EV_P_ ev_signal *w)
792{ 2253{
2254#if EV_MULTIPLICITY
2255 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2256#endif
793 if (ev_is_active (w)) 2257 if (expect_false (ev_is_active (w)))
794 return; 2258 return;
795 2259
796 ev_start ((W)w, 1); 2260 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2261
2262 evpipe_init (EV_A);
2263
2264 EV_FREQUENT_CHECK;
2265
2266 {
2267#ifndef _WIN32
2268 sigset_t full, prev;
2269 sigfillset (&full);
2270 sigprocmask (SIG_SETMASK, &full, &prev);
2271#endif
2272
797 array_needsize (signals, signalmax, w->signum, signals_init); 2273 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2274
2275#ifndef _WIN32
2276 sigprocmask (SIG_SETMASK, &prev, 0);
2277#endif
2278 }
2279
2280 ev_start (EV_A_ (W)w, 1);
798 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2281 wlist_add (&signals [w->signum - 1].head, (WL)w);
799 2282
800 if (!w->next) 2283 if (!((WL)w)->next)
801 { 2284 {
2285#if _WIN32
2286 signal (w->signum, ev_sighandler);
2287#else
802 struct sigaction sa; 2288 struct sigaction sa;
803 sa.sa_handler = sighandler; 2289 sa.sa_handler = ev_sighandler;
804 sigfillset (&sa.sa_mask); 2290 sigfillset (&sa.sa_mask);
805 sa.sa_flags = 0; 2291 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
806 sigaction (w->signum, &sa, 0); 2292 sigaction (w->signum, &sa, 0);
2293#endif
807 } 2294 }
808}
809 2295
810void 2296 EV_FREQUENT_CHECK;
2297}
2298
2299void noinline
811evsignal_stop (struct ev_signal *w) 2300ev_signal_stop (EV_P_ ev_signal *w)
812{ 2301{
813 ev_clear ((W)w); 2302 clear_pending (EV_A_ (W)w);
814 if (!ev_is_active (w)) 2303 if (expect_false (!ev_is_active (w)))
815 return; 2304 return;
816 2305
2306 EV_FREQUENT_CHECK;
2307
817 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2308 wlist_del (&signals [w->signum - 1].head, (WL)w);
818 ev_stop ((W)w); 2309 ev_stop (EV_A_ (W)w);
819 2310
820 if (!signals [w->signum - 1].head) 2311 if (!signals [w->signum - 1].head)
821 signal (w->signum, SIG_DFL); 2312 signal (w->signum, SIG_DFL);
822}
823 2313
824void evidle_start (struct ev_idle *w) 2314 EV_FREQUENT_CHECK;
2315}
2316
2317void
2318ev_child_start (EV_P_ ev_child *w)
825{ 2319{
2320#if EV_MULTIPLICITY
2321 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2322#endif
826 if (ev_is_active (w)) 2323 if (expect_false (ev_is_active (w)))
827 return; 2324 return;
828 2325
829 ev_start ((W)w, ++idlecnt); 2326 EV_FREQUENT_CHECK;
830 array_needsize (idles, idlemax, idlecnt, );
831 idles [idlecnt - 1] = w;
832}
833 2327
834void evidle_stop (struct ev_idle *w) 2328 ev_start (EV_A_ (W)w, 1);
2329 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2330
2331 EV_FREQUENT_CHECK;
2332}
2333
2334void
2335ev_child_stop (EV_P_ ev_child *w)
835{ 2336{
836 ev_clear ((W)w); 2337 clear_pending (EV_A_ (W)w);
837 if (ev_is_active (w)) 2338 if (expect_false (!ev_is_active (w)))
838 return; 2339 return;
839 2340
840 idles [w->active - 1] = idles [--idlecnt]; 2341 EV_FREQUENT_CHECK;
2342
2343 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
841 ev_stop ((W)w); 2344 ev_stop (EV_A_ (W)w);
842}
843 2345
844void evprepare_start (struct ev_prepare *w) 2346 EV_FREQUENT_CHECK;
2347}
2348
2349#if EV_STAT_ENABLE
2350
2351# ifdef _WIN32
2352# undef lstat
2353# define lstat(a,b) _stati64 (a,b)
2354# endif
2355
2356#define DEF_STAT_INTERVAL 5.0074891
2357#define MIN_STAT_INTERVAL 0.1074891
2358
2359static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2360
2361#if EV_USE_INOTIFY
2362# define EV_INOTIFY_BUFSIZE 8192
2363
2364static void noinline
2365infy_add (EV_P_ ev_stat *w)
845{ 2366{
846 if (ev_is_active (w)) 2367 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);
2368
2369 if (w->wd < 0)
2370 {
2371 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2372
2373 /* monitor some parent directory for speedup hints */
2374 /* note that exceeding the hardcoded limit is not a correctness issue, */
2375 /* but an efficiency issue only */
2376 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2377 {
2378 char path [4096];
2379 strcpy (path, w->path);
2380
2381 do
2382 {
2383 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2384 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2385
2386 char *pend = strrchr (path, '/');
2387
2388 if (!pend)
2389 break; /* whoops, no '/', complain to your admin */
2390
2391 *pend = 0;
2392 w->wd = inotify_add_watch (fs_fd, path, mask);
2393 }
2394 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2395 }
2396 }
2397 else
2398 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2399
2400 if (w->wd >= 0)
2401 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2402}
2403
2404static void noinline
2405infy_del (EV_P_ ev_stat *w)
2406{
2407 int slot;
2408 int wd = w->wd;
2409
2410 if (wd < 0)
847 return; 2411 return;
848 2412
2413 w->wd = -2;
2414 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2415 wlist_del (&fs_hash [slot].head, (WL)w);
2416
2417 /* remove this watcher, if others are watching it, they will rearm */
2418 inotify_rm_watch (fs_fd, wd);
2419}
2420
2421static void noinline
2422infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2423{
2424 if (slot < 0)
2425 /* overflow, need to check for all hahs slots */
2426 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2427 infy_wd (EV_A_ slot, wd, ev);
2428 else
2429 {
2430 WL w_;
2431
2432 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2433 {
2434 ev_stat *w = (ev_stat *)w_;
2435 w_ = w_->next; /* lets us remove this watcher and all before it */
2436
2437 if (w->wd == wd || wd == -1)
2438 {
2439 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2440 {
2441 w->wd = -1;
2442 infy_add (EV_A_ w); /* re-add, no matter what */
2443 }
2444
2445 stat_timer_cb (EV_A_ &w->timer, 0);
2446 }
2447 }
2448 }
2449}
2450
2451static void
2452infy_cb (EV_P_ ev_io *w, int revents)
2453{
2454 char buf [EV_INOTIFY_BUFSIZE];
2455 struct inotify_event *ev = (struct inotify_event *)buf;
2456 int ofs;
2457 int len = read (fs_fd, buf, sizeof (buf));
2458
2459 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2460 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2461}
2462
2463void inline_size
2464infy_init (EV_P)
2465{
2466 if (fs_fd != -2)
2467 return;
2468
2469 fs_fd = inotify_init ();
2470
2471 if (fs_fd >= 0)
2472 {
2473 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2474 ev_set_priority (&fs_w, EV_MAXPRI);
2475 ev_io_start (EV_A_ &fs_w);
2476 }
2477}
2478
2479void inline_size
2480infy_fork (EV_P)
2481{
2482 int slot;
2483
2484 if (fs_fd < 0)
2485 return;
2486
2487 close (fs_fd);
2488 fs_fd = inotify_init ();
2489
2490 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2491 {
2492 WL w_ = fs_hash [slot].head;
2493 fs_hash [slot].head = 0;
2494
2495 while (w_)
2496 {
2497 ev_stat *w = (ev_stat *)w_;
2498 w_ = w_->next; /* lets us add this watcher */
2499
2500 w->wd = -1;
2501
2502 if (fs_fd >= 0)
2503 infy_add (EV_A_ w); /* re-add, no matter what */
2504 else
2505 ev_timer_start (EV_A_ &w->timer);
2506 }
2507
2508 }
2509}
2510
2511#endif
2512
2513void
2514ev_stat_stat (EV_P_ ev_stat *w)
2515{
2516 if (lstat (w->path, &w->attr) < 0)
2517 w->attr.st_nlink = 0;
2518 else if (!w->attr.st_nlink)
2519 w->attr.st_nlink = 1;
2520}
2521
2522static void noinline
2523stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2524{
2525 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2526
2527 /* we copy this here each the time so that */
2528 /* prev has the old value when the callback gets invoked */
2529 w->prev = w->attr;
2530 ev_stat_stat (EV_A_ w);
2531
2532 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2533 if (
2534 w->prev.st_dev != w->attr.st_dev
2535 || w->prev.st_ino != w->attr.st_ino
2536 || w->prev.st_mode != w->attr.st_mode
2537 || w->prev.st_nlink != w->attr.st_nlink
2538 || w->prev.st_uid != w->attr.st_uid
2539 || w->prev.st_gid != w->attr.st_gid
2540 || w->prev.st_rdev != w->attr.st_rdev
2541 || w->prev.st_size != w->attr.st_size
2542 || w->prev.st_atime != w->attr.st_atime
2543 || w->prev.st_mtime != w->attr.st_mtime
2544 || w->prev.st_ctime != w->attr.st_ctime
2545 ) {
2546 #if EV_USE_INOTIFY
2547 infy_del (EV_A_ w);
2548 infy_add (EV_A_ w);
2549 ev_stat_stat (EV_A_ w); /* avoid race... */
2550 #endif
2551
2552 ev_feed_event (EV_A_ w, EV_STAT);
2553 }
2554}
2555
2556void
2557ev_stat_start (EV_P_ ev_stat *w)
2558{
2559 if (expect_false (ev_is_active (w)))
2560 return;
2561
2562 /* since we use memcmp, we need to clear any padding data etc. */
2563 memset (&w->prev, 0, sizeof (ev_statdata));
2564 memset (&w->attr, 0, sizeof (ev_statdata));
2565
2566 ev_stat_stat (EV_A_ w);
2567
2568 if (w->interval < MIN_STAT_INTERVAL)
2569 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2570
2571 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2572 ev_set_priority (&w->timer, ev_priority (w));
2573
2574#if EV_USE_INOTIFY
2575 infy_init (EV_A);
2576
2577 if (fs_fd >= 0)
2578 infy_add (EV_A_ w);
2579 else
2580#endif
2581 ev_timer_start (EV_A_ &w->timer);
2582
2583 ev_start (EV_A_ (W)w, 1);
2584
2585 EV_FREQUENT_CHECK;
2586}
2587
2588void
2589ev_stat_stop (EV_P_ ev_stat *w)
2590{
2591 clear_pending (EV_A_ (W)w);
2592 if (expect_false (!ev_is_active (w)))
2593 return;
2594
2595 EV_FREQUENT_CHECK;
2596
2597#if EV_USE_INOTIFY
2598 infy_del (EV_A_ w);
2599#endif
2600 ev_timer_stop (EV_A_ &w->timer);
2601
2602 ev_stop (EV_A_ (W)w);
2603
2604 EV_FREQUENT_CHECK;
2605}
2606#endif
2607
2608#if EV_IDLE_ENABLE
2609void
2610ev_idle_start (EV_P_ ev_idle *w)
2611{
2612 if (expect_false (ev_is_active (w)))
2613 return;
2614
2615 pri_adjust (EV_A_ (W)w);
2616
2617 EV_FREQUENT_CHECK;
2618
2619 {
2620 int active = ++idlecnt [ABSPRI (w)];
2621
2622 ++idleall;
2623 ev_start (EV_A_ (W)w, active);
2624
2625 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2626 idles [ABSPRI (w)][active - 1] = w;
2627 }
2628
2629 EV_FREQUENT_CHECK;
2630}
2631
2632void
2633ev_idle_stop (EV_P_ ev_idle *w)
2634{
2635 clear_pending (EV_A_ (W)w);
2636 if (expect_false (!ev_is_active (w)))
2637 return;
2638
2639 EV_FREQUENT_CHECK;
2640
2641 {
2642 int active = ev_active (w);
2643
2644 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2645 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2646
2647 ev_stop (EV_A_ (W)w);
2648 --idleall;
2649 }
2650
2651 EV_FREQUENT_CHECK;
2652}
2653#endif
2654
2655void
2656ev_prepare_start (EV_P_ ev_prepare *w)
2657{
2658 if (expect_false (ev_is_active (w)))
2659 return;
2660
2661 EV_FREQUENT_CHECK;
2662
849 ev_start ((W)w, ++preparecnt); 2663 ev_start (EV_A_ (W)w, ++preparecnt);
850 array_needsize (prepares, preparemax, preparecnt, ); 2664 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
851 prepares [preparecnt - 1] = w; 2665 prepares [preparecnt - 1] = w;
852}
853 2666
2667 EV_FREQUENT_CHECK;
2668}
2669
2670void
854void evprepare_stop (struct ev_prepare *w) 2671ev_prepare_stop (EV_P_ ev_prepare *w)
855{ 2672{
856 ev_clear ((W)w); 2673 clear_pending (EV_A_ (W)w);
857 if (ev_is_active (w)) 2674 if (expect_false (!ev_is_active (w)))
858 return; 2675 return;
859 2676
2677 EV_FREQUENT_CHECK;
2678
2679 {
2680 int active = ev_active (w);
2681
860 prepares [w->active - 1] = prepares [--preparecnt]; 2682 prepares [active - 1] = prepares [--preparecnt];
2683 ev_active (prepares [active - 1]) = active;
2684 }
2685
861 ev_stop ((W)w); 2686 ev_stop (EV_A_ (W)w);
862}
863 2687
2688 EV_FREQUENT_CHECK;
2689}
2690
2691void
864void evcheck_start (struct ev_check *w) 2692ev_check_start (EV_P_ ev_check *w)
865{ 2693{
866 if (ev_is_active (w)) 2694 if (expect_false (ev_is_active (w)))
867 return; 2695 return;
868 2696
2697 EV_FREQUENT_CHECK;
2698
869 ev_start ((W)w, ++checkcnt); 2699 ev_start (EV_A_ (W)w, ++checkcnt);
870 array_needsize (checks, checkmax, checkcnt, ); 2700 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
871 checks [checkcnt - 1] = w; 2701 checks [checkcnt - 1] = w;
872}
873 2702
2703 EV_FREQUENT_CHECK;
2704}
2705
2706void
874void evcheck_stop (struct ev_check *w) 2707ev_check_stop (EV_P_ ev_check *w)
875{ 2708{
876 ev_clear ((W)w); 2709 clear_pending (EV_A_ (W)w);
877 if (ev_is_active (w)) 2710 if (expect_false (!ev_is_active (w)))
878 return; 2711 return;
879 2712
2713 EV_FREQUENT_CHECK;
2714
2715 {
2716 int active = ev_active (w);
2717
880 checks [w->active - 1] = checks [--checkcnt]; 2718 checks [active - 1] = checks [--checkcnt];
2719 ev_active (checks [active - 1]) = active;
2720 }
2721
881 ev_stop ((W)w); 2722 ev_stop (EV_A_ (W)w);
2723
2724 EV_FREQUENT_CHECK;
882} 2725}
2726
2727#if EV_EMBED_ENABLE
2728void noinline
2729ev_embed_sweep (EV_P_ ev_embed *w)
2730{
2731 ev_loop (w->other, EVLOOP_NONBLOCK);
2732}
2733
2734static void
2735embed_io_cb (EV_P_ ev_io *io, int revents)
2736{
2737 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2738
2739 if (ev_cb (w))
2740 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2741 else
2742 ev_loop (w->other, EVLOOP_NONBLOCK);
2743}
2744
2745static void
2746embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2747{
2748 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2749
2750 {
2751 struct ev_loop *loop = w->other;
2752
2753 while (fdchangecnt)
2754 {
2755 fd_reify (EV_A);
2756 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2757 }
2758 }
2759}
2760
2761#if 0
2762static void
2763embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2764{
2765 ev_idle_stop (EV_A_ idle);
2766}
2767#endif
2768
2769void
2770ev_embed_start (EV_P_ ev_embed *w)
2771{
2772 if (expect_false (ev_is_active (w)))
2773 return;
2774
2775 {
2776 struct ev_loop *loop = w->other;
2777 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2778 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2779 }
2780
2781 EV_FREQUENT_CHECK;
2782
2783 ev_set_priority (&w->io, ev_priority (w));
2784 ev_io_start (EV_A_ &w->io);
2785
2786 ev_prepare_init (&w->prepare, embed_prepare_cb);
2787 ev_set_priority (&w->prepare, EV_MINPRI);
2788 ev_prepare_start (EV_A_ &w->prepare);
2789
2790 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2791
2792 ev_start (EV_A_ (W)w, 1);
2793
2794 EV_FREQUENT_CHECK;
2795}
2796
2797void
2798ev_embed_stop (EV_P_ ev_embed *w)
2799{
2800 clear_pending (EV_A_ (W)w);
2801 if (expect_false (!ev_is_active (w)))
2802 return;
2803
2804 EV_FREQUENT_CHECK;
2805
2806 ev_io_stop (EV_A_ &w->io);
2807 ev_prepare_stop (EV_A_ &w->prepare);
2808
2809 ev_stop (EV_A_ (W)w);
2810
2811 EV_FREQUENT_CHECK;
2812}
2813#endif
2814
2815#if EV_FORK_ENABLE
2816void
2817ev_fork_start (EV_P_ ev_fork *w)
2818{
2819 if (expect_false (ev_is_active (w)))
2820 return;
2821
2822 EV_FREQUENT_CHECK;
2823
2824 ev_start (EV_A_ (W)w, ++forkcnt);
2825 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2826 forks [forkcnt - 1] = w;
2827
2828 EV_FREQUENT_CHECK;
2829}
2830
2831void
2832ev_fork_stop (EV_P_ ev_fork *w)
2833{
2834 clear_pending (EV_A_ (W)w);
2835 if (expect_false (!ev_is_active (w)))
2836 return;
2837
2838 EV_FREQUENT_CHECK;
2839
2840 {
2841 int active = ev_active (w);
2842
2843 forks [active - 1] = forks [--forkcnt];
2844 ev_active (forks [active - 1]) = active;
2845 }
2846
2847 ev_stop (EV_A_ (W)w);
2848
2849 EV_FREQUENT_CHECK;
2850}
2851#endif
2852
2853#if EV_ASYNC_ENABLE
2854void
2855ev_async_start (EV_P_ ev_async *w)
2856{
2857 if (expect_false (ev_is_active (w)))
2858 return;
2859
2860 evpipe_init (EV_A);
2861
2862 EV_FREQUENT_CHECK;
2863
2864 ev_start (EV_A_ (W)w, ++asynccnt);
2865 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2866 asyncs [asynccnt - 1] = w;
2867
2868 EV_FREQUENT_CHECK;
2869}
2870
2871void
2872ev_async_stop (EV_P_ ev_async *w)
2873{
2874 clear_pending (EV_A_ (W)w);
2875 if (expect_false (!ev_is_active (w)))
2876 return;
2877
2878 EV_FREQUENT_CHECK;
2879
2880 {
2881 int active = ev_active (w);
2882
2883 asyncs [active - 1] = asyncs [--asynccnt];
2884 ev_active (asyncs [active - 1]) = active;
2885 }
2886
2887 ev_stop (EV_A_ (W)w);
2888
2889 EV_FREQUENT_CHECK;
2890}
2891
2892void
2893ev_async_send (EV_P_ ev_async *w)
2894{
2895 w->sent = 1;
2896 evpipe_write (EV_A_ &gotasync);
2897}
2898#endif
883 2899
884/*****************************************************************************/ 2900/*****************************************************************************/
885 2901
886struct ev_once 2902struct ev_once
887{ 2903{
888 struct ev_io io; 2904 ev_io io;
889 struct ev_timer to; 2905 ev_timer to;
890 void (*cb)(int revents, void *arg); 2906 void (*cb)(int revents, void *arg);
891 void *arg; 2907 void *arg;
892}; 2908};
893 2909
894static void 2910static void
895once_cb (struct ev_once *once, int revents) 2911once_cb (EV_P_ struct ev_once *once, int revents)
896{ 2912{
897 void (*cb)(int revents, void *arg) = once->cb; 2913 void (*cb)(int revents, void *arg) = once->cb;
898 void *arg = once->arg; 2914 void *arg = once->arg;
899 2915
900 evio_stop (&once->io); 2916 ev_io_stop (EV_A_ &once->io);
901 evtimer_stop (&once->to); 2917 ev_timer_stop (EV_A_ &once->to);
902 free (once); 2918 ev_free (once);
903 2919
904 cb (revents, arg); 2920 cb (revents, arg);
905} 2921}
906 2922
907static void 2923static void
908once_cb_io (struct ev_io *w, int revents) 2924once_cb_io (EV_P_ ev_io *w, int revents)
909{ 2925{
910 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2926 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
911} 2927}
912 2928
913static void 2929static void
914once_cb_to (struct ev_timer *w, int revents) 2930once_cb_to (EV_P_ ev_timer *w, int revents)
915{ 2931{
916 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2932 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
917} 2933}
918 2934
919void 2935void
920ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2936ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
921{ 2937{
922 struct ev_once *once = malloc (sizeof (struct ev_once)); 2938 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
923 2939
924 if (!once) 2940 if (expect_false (!once))
925 cb (EV_ERROR, arg); 2941 {
926 else 2942 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
2943 return;
927 { 2944 }
2945
928 once->cb = cb; 2946 once->cb = cb;
929 once->arg = arg; 2947 once->arg = arg;
930 2948
931 evw_init (&once->io, once_cb_io); 2949 ev_init (&once->io, once_cb_io);
932
933 if (fd >= 0) 2950 if (fd >= 0)
934 { 2951 {
935 evio_set (&once->io, fd, events); 2952 ev_io_set (&once->io, fd, events);
936 evio_start (&once->io); 2953 ev_io_start (EV_A_ &once->io);
937 } 2954 }
938 2955
939 evw_init (&once->to, once_cb_to); 2956 ev_init (&once->to, once_cb_to);
940
941 if (timeout >= 0.) 2957 if (timeout >= 0.)
942 { 2958 {
943 evtimer_set (&once->to, timeout, 0.); 2959 ev_timer_set (&once->to, timeout, 0.);
944 evtimer_start (&once->to); 2960 ev_timer_start (EV_A_ &once->to);
945 }
946 }
947}
948
949/*****************************************************************************/
950
951#if 0
952
953struct ev_io wio;
954
955static void
956sin_cb (struct ev_io *w, int revents)
957{
958 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
959}
960
961static void
962ocb (struct ev_timer *w, int revents)
963{
964 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
965 evtimer_stop (w);
966 evtimer_start (w);
967}
968
969static void
970scb (struct ev_signal *w, int revents)
971{
972 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
973 evio_stop (&wio);
974 evio_start (&wio);
975}
976
977static void
978gcb (struct ev_signal *w, int revents)
979{
980 fprintf (stderr, "generic %x\n", revents);
981
982}
983
984int main (void)
985{
986 ev_init (0);
987
988 evio_init (&wio, sin_cb, 0, EV_READ);
989 evio_start (&wio);
990
991 struct ev_timer t[10000];
992
993#if 0
994 int i;
995 for (i = 0; i < 10000; ++i)
996 { 2961 }
997 struct ev_timer *w = t + i;
998 evw_init (w, ocb, i);
999 evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1000 evtimer_start (w);
1001 if (drand48 () < 0.5)
1002 evtimer_stop (w);
1003 }
1004#endif
1005
1006 struct ev_timer t1;
1007 evtimer_init (&t1, ocb, 5, 10);
1008 evtimer_start (&t1);
1009
1010 struct ev_signal sig;
1011 evsignal_init (&sig, scb, SIGQUIT);
1012 evsignal_start (&sig);
1013
1014 struct ev_check cw;
1015 evcheck_init (&cw, gcb);
1016 evcheck_start (&cw);
1017
1018 struct ev_idle iw;
1019 evidle_init (&iw, gcb);
1020 evidle_start (&iw);
1021
1022 ev_loop (0);
1023
1024 return 0;
1025} 2962}
1026 2963
2964#if EV_MULTIPLICITY
2965 #include "ev_wrap.h"
1027#endif 2966#endif
1028 2967
2968#ifdef __cplusplus
2969}
2970#endif
1029 2971
1030
1031

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