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Comparing libev/ev.c (file contents):
Revision 1.24 by root, Wed Oct 31 20:46:44 2007 UTC vs.
Revision 1.245 by root, Wed May 21 00:26:01 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/types.h> 143#include <sys/types.h>
42#include <sys/wait.h>
43#include <sys/time.h>
44#include <time.h> 144#include <time.h>
45 145
46#ifndef HAVE_MONOTONIC 146#include <signal.h>
47# ifdef CLOCK_MONOTONIC 147
48# 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
49# endif 163# endif
50#endif 164#endif
51 165
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
52#ifndef HAVE_SELECT 180#ifndef EV_USE_SELECT
53# 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
54#endif 189# endif
190#endif
55 191
56#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
57# define HAVE_EPOLL 0 196# define EV_USE_EPOLL 0
58#endif 197# endif
198#endif
59 199
60#ifndef HAVE_REALTIME 200#ifndef EV_USE_KQUEUE
61# 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
62#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#ifndef EV_USE_4HEAP
241# define EV_USE_4HEAP !EV_MINIMAL
242#endif
243
244#ifndef EV_HEAP_CACHE_AT
245# define EV_HEAP_CACHE_AT !EV_MINIMAL
246#endif
247
248/* this block fixes any misconfiguration where we know we run into trouble otherwise */
249
250#ifndef CLOCK_MONOTONIC
251# undef EV_USE_MONOTONIC
252# define EV_USE_MONOTONIC 0
253#endif
254
255#ifndef CLOCK_REALTIME
256# undef EV_USE_REALTIME
257# define EV_USE_REALTIME 0
258#endif
259
260#if !EV_STAT_ENABLE
261# undef EV_USE_INOTIFY
262# define EV_USE_INOTIFY 0
263#endif
264
265#if !EV_USE_NANOSLEEP
266# ifndef _WIN32
267# include <sys/select.h>
268# endif
269#endif
270
271#if EV_USE_INOTIFY
272# include <sys/inotify.h>
273#endif
274
275#if EV_SELECT_IS_WINSOCKET
276# include <winsock.h>
277#endif
278
279#if EV_USE_EVENTFD
280/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
281# include <stdint.h>
282# ifdef __cplusplus
283extern "C" {
284# endif
285int eventfd (unsigned int initval, int flags);
286# ifdef __cplusplus
287}
288# endif
289#endif
290
291/**/
292
293/*
294 * This is used to avoid floating point rounding problems.
295 * It is added to ev_rt_now when scheduling periodics
296 * to ensure progress, time-wise, even when rounding
297 * errors are against us.
298 * This value is good at least till the year 4000.
299 * Better solutions welcome.
300 */
301#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
63 302
64#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 303#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65#define MAX_BLOCKTIME 60. 304#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
66#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */ 305/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
67 306
68#include "ev.h" 307#if __GNUC__ >= 4
308# define expect(expr,value) __builtin_expect ((expr),(value))
309# define noinline __attribute__ ((noinline))
310#else
311# define expect(expr,value) (expr)
312# define noinline
313# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
314# define inline
315# endif
316#endif
69 317
318#define expect_false(expr) expect ((expr) != 0, 0)
319#define expect_true(expr) expect ((expr) != 0, 1)
320#define inline_size static inline
321
322#if EV_MINIMAL
323# define inline_speed static noinline
324#else
325# define inline_speed static inline
326#endif
327
328#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
329#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
330
331#define EMPTY /* required for microsofts broken pseudo-c compiler */
332#define EMPTY2(a,b) /* used to suppress some warnings */
333
70typedef struct ev_watcher *W; 334typedef ev_watcher *W;
71typedef struct ev_watcher_list *WL; 335typedef ev_watcher_list *WL;
72typedef struct ev_watcher_time *WT; 336typedef ev_watcher_time *WT;
73 337
74static ev_tstamp now, diff; /* monotonic clock */ 338#define ev_active(w) ((W)(w))->active
339#define ev_at(w) ((WT)(w))->at
340
341#if EV_USE_MONOTONIC
342/* sig_atomic_t is used to avoid per-thread variables or locking but still */
343/* giving it a reasonably high chance of working on typical architetcures */
344static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
345#endif
346
347#ifdef _WIN32
348# include "ev_win32.c"
349#endif
350
351/*****************************************************************************/
352
353static void (*syserr_cb)(const char *msg);
354
355void
356ev_set_syserr_cb (void (*cb)(const char *msg))
357{
358 syserr_cb = cb;
359}
360
361static void noinline
362syserr (const char *msg)
363{
364 if (!msg)
365 msg = "(libev) system error";
366
367 if (syserr_cb)
368 syserr_cb (msg);
369 else
370 {
371 perror (msg);
372 abort ();
373 }
374}
375
376static void *
377ev_realloc_emul (void *ptr, long size)
378{
379 /* some systems, notably openbsd and darwin, fail to properly
380 * implement realloc (x, 0) (as required by both ansi c-98 and
381 * the single unix specification, so work around them here.
382 */
383
384 if (size)
385 return realloc (ptr, size);
386
387 free (ptr);
388 return 0;
389}
390
391static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
392
393void
394ev_set_allocator (void *(*cb)(void *ptr, long size))
395{
396 alloc = cb;
397}
398
399inline_speed void *
400ev_realloc (void *ptr, long size)
401{
402 ptr = alloc (ptr, size);
403
404 if (!ptr && size)
405 {
406 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
407 abort ();
408 }
409
410 return ptr;
411}
412
413#define ev_malloc(size) ev_realloc (0, (size))
414#define ev_free(ptr) ev_realloc ((ptr), 0)
415
416/*****************************************************************************/
417
418typedef struct
419{
420 WL head;
421 unsigned char events;
422 unsigned char reify;
423#if EV_SELECT_IS_WINSOCKET
424 SOCKET handle;
425#endif
426} ANFD;
427
428typedef struct
429{
430 W w;
431 int events;
432} ANPENDING;
433
434#if EV_USE_INOTIFY
435/* hash table entry per inotify-id */
436typedef struct
437{
438 WL head;
439} ANFS;
440#endif
441
442/* Heap Entry */
443#if EV_HEAP_CACHE_AT
444 typedef struct {
445 ev_tstamp at;
446 WT w;
447 } ANHE;
448
449 #define ANHE_w(he) (he).w /* access watcher, read-write */
450 #define ANHE_at(he) (he).at /* access cached at, read-only */
451 #define ANHE_at_set(he) (he).at = (he).w->at /* update at from watcher */
452#else
453 typedef WT ANHE;
454
455 #define ANHE_w(he) (he)
456 #define ANHE_at(he) (he)->at
457 #define ANHE_at_set(he)
458#endif
459
460#if EV_MULTIPLICITY
461
462 struct ev_loop
463 {
464 ev_tstamp ev_rt_now;
465 #define ev_rt_now ((loop)->ev_rt_now)
466 #define VAR(name,decl) decl;
467 #include "ev_vars.h"
468 #undef VAR
469 };
470 #include "ev_wrap.h"
471
472 static struct ev_loop default_loop_struct;
473 struct ev_loop *ev_default_loop_ptr;
474
475#else
476
75ev_tstamp ev_now; 477 ev_tstamp ev_rt_now;
76int ev_method; 478 #define VAR(name,decl) static decl;
479 #include "ev_vars.h"
480 #undef VAR
77 481
78static int have_monotonic; /* runtime */ 482 static int ev_default_loop_ptr;
79 483
80static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 484#endif
81static void (*method_modify)(int fd, int oev, int nev);
82static void (*method_poll)(ev_tstamp timeout);
83 485
84/*****************************************************************************/ 486/*****************************************************************************/
85 487
86ev_tstamp 488ev_tstamp
87ev_time (void) 489ev_time (void)
88{ 490{
89#if HAVE_REALTIME 491#if EV_USE_REALTIME
90 struct timespec ts; 492 struct timespec ts;
91 clock_gettime (CLOCK_REALTIME, &ts); 493 clock_gettime (CLOCK_REALTIME, &ts);
92 return ts.tv_sec + ts.tv_nsec * 1e-9; 494 return ts.tv_sec + ts.tv_nsec * 1e-9;
93#else 495#else
94 struct timeval tv; 496 struct timeval tv;
95 gettimeofday (&tv, 0); 497 gettimeofday (&tv, 0);
96 return tv.tv_sec + tv.tv_usec * 1e-6; 498 return tv.tv_sec + tv.tv_usec * 1e-6;
97#endif 499#endif
98} 500}
99 501
100static ev_tstamp 502ev_tstamp inline_size
101get_clock (void) 503get_clock (void)
102{ 504{
103#if HAVE_MONOTONIC 505#if EV_USE_MONOTONIC
104 if (have_monotonic) 506 if (expect_true (have_monotonic))
105 { 507 {
106 struct timespec ts; 508 struct timespec ts;
107 clock_gettime (CLOCK_MONOTONIC, &ts); 509 clock_gettime (CLOCK_MONOTONIC, &ts);
108 return ts.tv_sec + ts.tv_nsec * 1e-9; 510 return ts.tv_sec + ts.tv_nsec * 1e-9;
109 } 511 }
110#endif 512#endif
111 513
112 return ev_time (); 514 return ev_time ();
113} 515}
114 516
115#define array_needsize(base,cur,cnt,init) \ 517#if EV_MULTIPLICITY
116 if ((cnt) > cur) \ 518ev_tstamp
117 { \ 519ev_now (EV_P)
118 int newcnt = cur; \ 520{
119 do \ 521 return ev_rt_now;
120 { \ 522}
121 newcnt = (newcnt << 1) | 4 & ~3; \ 523#endif
122 } \ 524
123 while ((cnt) > newcnt); \ 525void
124 \ 526ev_sleep (ev_tstamp delay)
125 base = realloc (base, sizeof (*base) * (newcnt)); \ 527{
126 init (base + cur, newcnt - cur); \ 528 if (delay > 0.)
127 cur = newcnt; \
128 } 529 {
530#if EV_USE_NANOSLEEP
531 struct timespec ts;
532
533 ts.tv_sec = (time_t)delay;
534 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
535
536 nanosleep (&ts, 0);
537#elif defined(_WIN32)
538 Sleep ((unsigned long)(delay * 1e3));
539#else
540 struct timeval tv;
541
542 tv.tv_sec = (time_t)delay;
543 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
544
545 select (0, 0, 0, 0, &tv);
546#endif
547 }
548}
129 549
130/*****************************************************************************/ 550/*****************************************************************************/
131 551
552#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
553
554int inline_size
555array_nextsize (int elem, int cur, int cnt)
556{
557 int ncur = cur + 1;
558
559 do
560 ncur <<= 1;
561 while (cnt > ncur);
562
563 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
564 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
565 {
566 ncur *= elem;
567 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
568 ncur = ncur - sizeof (void *) * 4;
569 ncur /= elem;
570 }
571
572 return ncur;
573}
574
575static noinline void *
576array_realloc (int elem, void *base, int *cur, int cnt)
577{
578 *cur = array_nextsize (elem, *cur, cnt);
579 return ev_realloc (base, elem * *cur);
580}
581
582#define array_needsize(type,base,cur,cnt,init) \
583 if (expect_false ((cnt) > (cur))) \
584 { \
585 int ocur_ = (cur); \
586 (base) = (type *)array_realloc \
587 (sizeof (type), (base), &(cur), (cnt)); \
588 init ((base) + (ocur_), (cur) - ocur_); \
589 }
590
591#if 0
592#define array_slim(type,stem) \
593 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
594 { \
595 stem ## max = array_roundsize (stem ## cnt >> 1); \
596 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
597 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
598 }
599#endif
600
601#define array_free(stem, idx) \
602 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
603
604/*****************************************************************************/
605
606void noinline
607ev_feed_event (EV_P_ void *w, int revents)
608{
609 W w_ = (W)w;
610 int pri = ABSPRI (w_);
611
612 if (expect_false (w_->pending))
613 pendings [pri][w_->pending - 1].events |= revents;
614 else
615 {
616 w_->pending = ++pendingcnt [pri];
617 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
618 pendings [pri][w_->pending - 1].w = w_;
619 pendings [pri][w_->pending - 1].events = revents;
620 }
621}
622
623void inline_speed
624queue_events (EV_P_ W *events, int eventcnt, int type)
625{
626 int i;
627
628 for (i = 0; i < eventcnt; ++i)
629 ev_feed_event (EV_A_ events [i], type);
630}
631
632/*****************************************************************************/
633
634void inline_size
635anfds_init (ANFD *base, int count)
636{
637 while (count--)
638 {
639 base->head = 0;
640 base->events = EV_NONE;
641 base->reify = 0;
642
643 ++base;
644 }
645}
646
647void inline_speed
648fd_event (EV_P_ int fd, int revents)
649{
650 ANFD *anfd = anfds + fd;
651 ev_io *w;
652
653 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
654 {
655 int ev = w->events & revents;
656
657 if (ev)
658 ev_feed_event (EV_A_ (W)w, ev);
659 }
660}
661
662void
663ev_feed_fd_event (EV_P_ int fd, int revents)
664{
665 if (fd >= 0 && fd < anfdmax)
666 fd_event (EV_A_ fd, revents);
667}
668
669void inline_size
670fd_reify (EV_P)
671{
672 int i;
673
674 for (i = 0; i < fdchangecnt; ++i)
675 {
676 int fd = fdchanges [i];
677 ANFD *anfd = anfds + fd;
678 ev_io *w;
679
680 unsigned char events = 0;
681
682 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
683 events |= (unsigned char)w->events;
684
685#if EV_SELECT_IS_WINSOCKET
686 if (events)
687 {
688 unsigned long argp;
689 #ifdef EV_FD_TO_WIN32_HANDLE
690 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
691 #else
692 anfd->handle = _get_osfhandle (fd);
693 #endif
694 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
695 }
696#endif
697
698 {
699 unsigned char o_events = anfd->events;
700 unsigned char o_reify = anfd->reify;
701
702 anfd->reify = 0;
703 anfd->events = events;
704
705 if (o_events != events || o_reify & EV_IOFDSET)
706 backend_modify (EV_A_ fd, o_events, events);
707 }
708 }
709
710 fdchangecnt = 0;
711}
712
713void inline_size
714fd_change (EV_P_ int fd, int flags)
715{
716 unsigned char reify = anfds [fd].reify;
717 anfds [fd].reify |= flags;
718
719 if (expect_true (!reify))
720 {
721 ++fdchangecnt;
722 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
723 fdchanges [fdchangecnt - 1] = fd;
724 }
725}
726
727void inline_speed
728fd_kill (EV_P_ int fd)
729{
730 ev_io *w;
731
732 while ((w = (ev_io *)anfds [fd].head))
733 {
734 ev_io_stop (EV_A_ w);
735 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
736 }
737}
738
739int inline_size
740fd_valid (int fd)
741{
742#ifdef _WIN32
743 return _get_osfhandle (fd) != -1;
744#else
745 return fcntl (fd, F_GETFD) != -1;
746#endif
747}
748
749/* called on EBADF to verify fds */
750static void noinline
751fd_ebadf (EV_P)
752{
753 int fd;
754
755 for (fd = 0; fd < anfdmax; ++fd)
756 if (anfds [fd].events)
757 if (!fd_valid (fd) == -1 && errno == EBADF)
758 fd_kill (EV_A_ fd);
759}
760
761/* called on ENOMEM in select/poll to kill some fds and retry */
762static void noinline
763fd_enomem (EV_P)
764{
765 int fd;
766
767 for (fd = anfdmax; fd--; )
768 if (anfds [fd].events)
769 {
770 fd_kill (EV_A_ fd);
771 return;
772 }
773}
774
775/* usually called after fork if backend needs to re-arm all fds from scratch */
776static void noinline
777fd_rearm_all (EV_P)
778{
779 int fd;
780
781 for (fd = 0; fd < anfdmax; ++fd)
782 if (anfds [fd].events)
783 {
784 anfds [fd].events = 0;
785 fd_change (EV_A_ fd, EV_IOFDSET | 1);
786 }
787}
788
789/*****************************************************************************/
790
791/*
792 * the heap functions want a real array index. array index 0 uis guaranteed to not
793 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
794 * the branching factor of the d-tree.
795 */
796
797/*
798 * at the moment we allow libev the luxury of two heaps,
799 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
800 * which is more cache-efficient.
801 * the difference is about 5% with 50000+ watchers.
802 */
803#if EV_USE_4HEAP
804
805#define DHEAP 4
806#define HEAP0 (DHEAP - 1) /* index of first element in heap */
807
808/* towards the root */
809void inline_speed
810upheap (ANHE *heap, int k)
811{
812 ANHE he = heap [k];
813
814 for (;;)
815 {
816 int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
817
818 if (p == k || ANHE_at (heap [p]) <= ANHE_at (he))
819 break;
820
821 heap [k] = heap [p];
822 ev_active (ANHE_w (heap [k])) = k;
823 k = p;
824 }
825
826 ev_active (ANHE_w (he)) = k;
827 heap [k] = he;
828}
829
830/* away from the root */
831void inline_speed
832downheap (ANHE *heap, int N, int k)
833{
834 ANHE he = heap [k];
835 ANHE *E = heap + N + HEAP0;
836
837 for (;;)
838 {
839 ev_tstamp minat;
840 ANHE *minpos;
841 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
842
843 // find minimum child
844 if (expect_true (pos + DHEAP - 1 < E))
845 {
846 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
847 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
848 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
849 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
850 }
851 else if (pos < E)
852 {
853 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
854 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
855 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
856 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
857 }
858 else
859 break;
860
861 if (ANHE_at (he) <= minat)
862 break;
863
864 ev_active (ANHE_w (*minpos)) = k;
865 heap [k] = *minpos;
866
867 k = minpos - heap;
868 }
869
870 ev_active (ANHE_w (he)) = k;
871 heap [k] = he;
872}
873
874#else // 4HEAP
875
876#define HEAP0 1
877
878/* towards the root */
879void inline_speed
880upheap (ANHE *heap, int k)
881{
882 ANHE he = heap [k];
883
884 for (;;)
885 {
886 int p = k >> 1;
887
888 /* maybe we could use a dummy element at heap [0]? */
889 if (!p || ANHE_at (heap [p]) <= ANHE_at (he))
890 break;
891
892 heap [k] = heap [p];
893 ev_active (ANHE_w (heap [k])) = k;
894 k = p;
895 }
896
897 heap [k] = he;
898 ev_active (ANHE_w (heap [k])) = k;
899}
900
901/* away from the root */
902void inline_speed
903downheap (ANHE *heap, int N, int k)
904{
905 ANHE he = heap [k];
906
907 for (;;)
908 {
909 int c = k << 1;
910
911 if (c > N)
912 break;
913
914 c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
915 ? 1 : 0;
916
917 if (ANHE_at (he) <= ANHE_at (heap [c]))
918 break;
919
920 heap [k] = heap [c];
921 ev_active (ANHE_w (heap [k])) = k;
922
923 k = c;
924 }
925
926 heap [k] = he;
927 ev_active (ANHE_w (he)) = k;
928}
929#endif
930
931void inline_size
932adjustheap (ANHE *heap, int N, int k)
933{
934 upheap (heap, k);
935 downheap (heap, N, k);
936}
937
938/*****************************************************************************/
939
132typedef struct 940typedef struct
133{ 941{
134 struct ev_io *head; 942 WL head;
135 unsigned char wev, rev; /* want, received event set */ 943 EV_ATOMIC_T gotsig;
136} ANFD;
137
138static ANFD *anfds;
139static int anfdmax;
140
141static int *fdchanges;
142static int fdchangemax, fdchangecnt;
143
144static void
145anfds_init (ANFD *base, int count)
146{
147 while (count--)
148 {
149 base->head = 0;
150 base->wev = base->rev = EV_NONE;
151 ++base;
152 }
153}
154
155typedef struct
156{
157 W w;
158 int events;
159} ANPENDING;
160
161static ANPENDING *pendings;
162static int pendingmax, pendingcnt;
163
164static void
165event (W w, int events)
166{
167 if (w->active)
168 {
169 w->pending = ++pendingcnt;
170 array_needsize (pendings, pendingmax, pendingcnt, );
171 pendings [pendingcnt - 1].w = w;
172 pendings [pendingcnt - 1].events = events;
173 }
174}
175
176static void
177fd_event (int fd, int events)
178{
179 ANFD *anfd = anfds + fd;
180 struct ev_io *w;
181
182 for (w = anfd->head; w; w = w->next)
183 {
184 int ev = w->events & events;
185
186 if (ev)
187 event ((W)w, ev);
188 }
189}
190
191static void
192queue_events (W *events, int eventcnt, int type)
193{
194 int i;
195
196 for (i = 0; i < eventcnt; ++i)
197 event (events [i], type);
198}
199
200/* called on EBADF to verify fds */
201static void
202fd_recheck (void)
203{
204 int fd;
205
206 for (fd = 0; fd < anfdmax; ++fd)
207 if (anfds [fd].wev)
208 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
209 while (anfds [fd].head)
210 {
211 event ((W)anfds [fd].head, EV_ERROR);
212 evio_stop (anfds [fd].head);
213 }
214}
215
216/*****************************************************************************/
217
218static struct ev_timer **timers;
219static int timermax, timercnt;
220
221static struct ev_periodic **periodics;
222static int periodicmax, periodiccnt;
223
224static void
225upheap (WT *timers, int k)
226{
227 WT w = timers [k];
228
229 while (k && timers [k >> 1]->at > w->at)
230 {
231 timers [k] = timers [k >> 1];
232 timers [k]->active = k + 1;
233 k >>= 1;
234 }
235
236 timers [k] = w;
237 timers [k]->active = k + 1;
238
239}
240
241static void
242downheap (WT *timers, int N, int k)
243{
244 WT w = timers [k];
245
246 while (k < (N >> 1))
247 {
248 int j = k << 1;
249
250 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
251 ++j;
252
253 if (w->at <= timers [j]->at)
254 break;
255
256 timers [k] = timers [j];
257 timers [k]->active = k + 1;
258 k = j;
259 }
260
261 timers [k] = w;
262 timers [k]->active = k + 1;
263}
264
265/*****************************************************************************/
266
267typedef struct
268{
269 struct ev_signal *head;
270 sig_atomic_t gotsig;
271} ANSIG; 944} ANSIG;
272 945
273static ANSIG *signals; 946static ANSIG *signals;
274static int signalmax; 947static int signalmax;
275 948
276static int sigpipe [2]; 949static EV_ATOMIC_T gotsig;
277static sig_atomic_t gotsig;
278static struct ev_io sigev;
279 950
280static void 951void inline_size
281signals_init (ANSIG *base, int count) 952signals_init (ANSIG *base, int count)
282{ 953{
283 while (count--) 954 while (count--)
284 { 955 {
285 base->head = 0; 956 base->head = 0;
286 base->gotsig = 0; 957 base->gotsig = 0;
958
287 ++base; 959 ++base;
288 } 960 }
289} 961}
290 962
963/*****************************************************************************/
964
965void inline_speed
966fd_intern (int fd)
967{
968#ifdef _WIN32
969 int arg = 1;
970 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
971#else
972 fcntl (fd, F_SETFD, FD_CLOEXEC);
973 fcntl (fd, F_SETFL, O_NONBLOCK);
974#endif
975}
976
977static void noinline
978evpipe_init (EV_P)
979{
980 if (!ev_is_active (&pipeev))
981 {
982#if EV_USE_EVENTFD
983 if ((evfd = eventfd (0, 0)) >= 0)
984 {
985 evpipe [0] = -1;
986 fd_intern (evfd);
987 ev_io_set (&pipeev, evfd, EV_READ);
988 }
989 else
990#endif
991 {
992 while (pipe (evpipe))
993 syserr ("(libev) error creating signal/async pipe");
994
995 fd_intern (evpipe [0]);
996 fd_intern (evpipe [1]);
997 ev_io_set (&pipeev, evpipe [0], EV_READ);
998 }
999
1000 ev_io_start (EV_A_ &pipeev);
1001 ev_unref (EV_A); /* watcher should not keep loop alive */
1002 }
1003}
1004
1005void inline_size
1006evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1007{
1008 if (!*flag)
1009 {
1010 int old_errno = errno; /* save errno because write might clobber it */
1011
1012 *flag = 1;
1013
1014#if EV_USE_EVENTFD
1015 if (evfd >= 0)
1016 {
1017 uint64_t counter = 1;
1018 write (evfd, &counter, sizeof (uint64_t));
1019 }
1020 else
1021#endif
1022 write (evpipe [1], &old_errno, 1);
1023
1024 errno = old_errno;
1025 }
1026}
1027
291static void 1028static void
1029pipecb (EV_P_ ev_io *iow, int revents)
1030{
1031#if EV_USE_EVENTFD
1032 if (evfd >= 0)
1033 {
1034 uint64_t counter;
1035 read (evfd, &counter, sizeof (uint64_t));
1036 }
1037 else
1038#endif
1039 {
1040 char dummy;
1041 read (evpipe [0], &dummy, 1);
1042 }
1043
1044 if (gotsig && ev_is_default_loop (EV_A))
1045 {
1046 int signum;
1047 gotsig = 0;
1048
1049 for (signum = signalmax; signum--; )
1050 if (signals [signum].gotsig)
1051 ev_feed_signal_event (EV_A_ signum + 1);
1052 }
1053
1054#if EV_ASYNC_ENABLE
1055 if (gotasync)
1056 {
1057 int i;
1058 gotasync = 0;
1059
1060 for (i = asynccnt; i--; )
1061 if (asyncs [i]->sent)
1062 {
1063 asyncs [i]->sent = 0;
1064 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1065 }
1066 }
1067#endif
1068}
1069
1070/*****************************************************************************/
1071
1072static void
292sighandler (int signum) 1073ev_sighandler (int signum)
293{ 1074{
1075#if EV_MULTIPLICITY
1076 struct ev_loop *loop = &default_loop_struct;
1077#endif
1078
1079#if _WIN32
1080 signal (signum, ev_sighandler);
1081#endif
1082
294 signals [signum - 1].gotsig = 1; 1083 signals [signum - 1].gotsig = 1;
295 1084 evpipe_write (EV_A_ &gotsig);
296 if (!gotsig)
297 {
298 gotsig = 1;
299 write (sigpipe [1], &gotsig, 1);
300 }
301} 1085}
302 1086
303static void 1087void noinline
304sigcb (struct ev_io *iow, int revents) 1088ev_feed_signal_event (EV_P_ int signum)
305{ 1089{
306 struct ev_signal *w; 1090 WL w;
307 int sig;
308 1091
309 gotsig = 0; 1092#if EV_MULTIPLICITY
310 read (sigpipe [0], &revents, 1); 1093 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1094#endif
311 1095
312 for (sig = signalmax; sig--; ) 1096 --signum;
313 if (signals [sig].gotsig) 1097
314 { 1098 if (signum < 0 || signum >= signalmax)
1099 return;
1100
315 signals [sig].gotsig = 0; 1101 signals [signum].gotsig = 0;
316 1102
317 for (w = signals [sig].head; w; w = w->next) 1103 for (w = signals [signum].head; w; w = w->next)
318 event ((W)w, EV_SIGNAL); 1104 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
319 }
320}
321
322static void
323siginit (void)
324{
325 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
326 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
327
328 /* rather than sort out wether we really need nb, set it */
329 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
330 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
331
332 evio_set (&sigev, sigpipe [0], EV_READ);
333 evio_start (&sigev);
334} 1105}
335 1106
336/*****************************************************************************/ 1107/*****************************************************************************/
337 1108
338static struct ev_idle **idles; 1109static WL childs [EV_PID_HASHSIZE];
339static int idlemax, idlecnt;
340 1110
341static struct ev_prepare **prepares; 1111#ifndef _WIN32
342static int preparemax, preparecnt;
343 1112
344static struct ev_check **checks;
345static int checkmax, checkcnt;
346
347/*****************************************************************************/
348
349static struct ev_child *childs [PID_HASHSIZE];
350static struct ev_signal childev; 1113static ev_signal childev;
1114
1115#ifndef WIFCONTINUED
1116# define WIFCONTINUED(status) 0
1117#endif
1118
1119void inline_speed
1120child_reap (EV_P_ int chain, int pid, int status)
1121{
1122 ev_child *w;
1123 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1124
1125 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1126 {
1127 if ((w->pid == pid || !w->pid)
1128 && (!traced || (w->flags & 1)))
1129 {
1130 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1131 w->rpid = pid;
1132 w->rstatus = status;
1133 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1134 }
1135 }
1136}
351 1137
352#ifndef WCONTINUED 1138#ifndef WCONTINUED
353# define WCONTINUED 0 1139# define WCONTINUED 0
354#endif 1140#endif
355 1141
356static void 1142static void
357childcb (struct ev_signal *sw, int revents) 1143childcb (EV_P_ ev_signal *sw, int revents)
358{ 1144{
359 struct ev_child *w;
360 int pid, status; 1145 int pid, status;
361 1146
1147 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
362 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1148 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
363 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1149 if (!WCONTINUED
364 if (w->pid == pid || w->pid == -1) 1150 || errno != EINVAL
365 { 1151 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
366 w->status = status; 1152 return;
367 event ((W)w, EV_CHILD); 1153
368 } 1154 /* make sure we are called again until all children have been reaped */
1155 /* we need to do it this way so that the callback gets called before we continue */
1156 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1157
1158 child_reap (EV_A_ pid, pid, status);
1159 if (EV_PID_HASHSIZE > 1)
1160 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
369} 1161}
1162
1163#endif
370 1164
371/*****************************************************************************/ 1165/*****************************************************************************/
372 1166
1167#if EV_USE_PORT
1168# include "ev_port.c"
1169#endif
1170#if EV_USE_KQUEUE
1171# include "ev_kqueue.c"
1172#endif
373#if HAVE_EPOLL 1173#if EV_USE_EPOLL
374# include "ev_epoll.c" 1174# include "ev_epoll.c"
375#endif 1175#endif
1176#if EV_USE_POLL
1177# include "ev_poll.c"
1178#endif
376#if HAVE_SELECT 1179#if EV_USE_SELECT
377# include "ev_select.c" 1180# include "ev_select.c"
378#endif 1181#endif
379 1182
380int 1183int
381ev_version_major (void) 1184ev_version_major (void)
… …
387ev_version_minor (void) 1190ev_version_minor (void)
388{ 1191{
389 return EV_VERSION_MINOR; 1192 return EV_VERSION_MINOR;
390} 1193}
391 1194
392int ev_init (int flags) 1195/* return true if we are running with elevated privileges and should ignore env variables */
1196int inline_size
1197enable_secure (void)
393{ 1198{
394 if (!ev_method) 1199#ifdef _WIN32
1200 return 0;
1201#else
1202 return getuid () != geteuid ()
1203 || getgid () != getegid ();
1204#endif
1205}
1206
1207unsigned int
1208ev_supported_backends (void)
1209{
1210 unsigned int flags = 0;
1211
1212 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1213 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1214 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1215 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1216 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1217
1218 return flags;
1219}
1220
1221unsigned int
1222ev_recommended_backends (void)
1223{
1224 unsigned int flags = ev_supported_backends ();
1225
1226#ifndef __NetBSD__
1227 /* kqueue is borked on everything but netbsd apparently */
1228 /* it usually doesn't work correctly on anything but sockets and pipes */
1229 flags &= ~EVBACKEND_KQUEUE;
1230#endif
1231#ifdef __APPLE__
1232 // flags &= ~EVBACKEND_KQUEUE; for documentation
1233 flags &= ~EVBACKEND_POLL;
1234#endif
1235
1236 return flags;
1237}
1238
1239unsigned int
1240ev_embeddable_backends (void)
1241{
1242 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1243
1244 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1245 /* please fix it and tell me how to detect the fix */
1246 flags &= ~EVBACKEND_EPOLL;
1247
1248 return flags;
1249}
1250
1251unsigned int
1252ev_backend (EV_P)
1253{
1254 return backend;
1255}
1256
1257unsigned int
1258ev_loop_count (EV_P)
1259{
1260 return loop_count;
1261}
1262
1263void
1264ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1265{
1266 io_blocktime = interval;
1267}
1268
1269void
1270ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1271{
1272 timeout_blocktime = interval;
1273}
1274
1275static void noinline
1276loop_init (EV_P_ unsigned int flags)
1277{
1278 if (!backend)
395 { 1279 {
396#if HAVE_MONOTONIC 1280#if EV_USE_MONOTONIC
397 { 1281 {
398 struct timespec ts; 1282 struct timespec ts;
399 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1283 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
400 have_monotonic = 1; 1284 have_monotonic = 1;
401 } 1285 }
402#endif 1286#endif
403 1287
404 ev_now = ev_time (); 1288 ev_rt_now = ev_time ();
405 now = get_clock (); 1289 mn_now = get_clock ();
1290 now_floor = mn_now;
406 diff = ev_now - now; 1291 rtmn_diff = ev_rt_now - mn_now;
407 1292
408 if (pipe (sigpipe)) 1293 io_blocktime = 0.;
409 return 0; 1294 timeout_blocktime = 0.;
1295 backend = 0;
1296 backend_fd = -1;
1297 gotasync = 0;
1298#if EV_USE_INOTIFY
1299 fs_fd = -2;
1300#endif
410 1301
411 ev_method = EVMETHOD_NONE; 1302 /* pid check not overridable via env */
1303#ifndef _WIN32
1304 if (flags & EVFLAG_FORKCHECK)
1305 curpid = getpid ();
1306#endif
1307
1308 if (!(flags & EVFLAG_NOENV)
1309 && !enable_secure ()
1310 && getenv ("LIBEV_FLAGS"))
1311 flags = atoi (getenv ("LIBEV_FLAGS"));
1312
1313 if (!(flags & 0x0000ffffU))
1314 flags |= ev_recommended_backends ();
1315
1316#if EV_USE_PORT
1317 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1318#endif
1319#if EV_USE_KQUEUE
1320 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1321#endif
412#if HAVE_EPOLL 1322#if EV_USE_EPOLL
413 if (ev_method == EVMETHOD_NONE) epoll_init (flags); 1323 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
414#endif 1324#endif
1325#if EV_USE_POLL
1326 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1327#endif
415#if HAVE_SELECT 1328#if EV_USE_SELECT
416 if (ev_method == EVMETHOD_NONE) select_init (flags); 1329 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
417#endif 1330#endif
418 1331
419 if (ev_method) 1332 ev_init (&pipeev, pipecb);
1333 ev_set_priority (&pipeev, EV_MAXPRI);
1334 }
1335}
1336
1337static void noinline
1338loop_destroy (EV_P)
1339{
1340 int i;
1341
1342 if (ev_is_active (&pipeev))
1343 {
1344 ev_ref (EV_A); /* signal watcher */
1345 ev_io_stop (EV_A_ &pipeev);
1346
1347#if EV_USE_EVENTFD
1348 if (evfd >= 0)
1349 close (evfd);
1350#endif
1351
1352 if (evpipe [0] >= 0)
420 { 1353 {
421 evw_init (&sigev, sigcb); 1354 close (evpipe [0]);
422 siginit (); 1355 close (evpipe [1]);
423
424 evsignal_init (&childev, childcb, SIGCHLD);
425 evsignal_start (&childev);
426 } 1356 }
427 } 1357 }
428 1358
429 return ev_method; 1359#if EV_USE_INOTIFY
1360 if (fs_fd >= 0)
1361 close (fs_fd);
1362#endif
1363
1364 if (backend_fd >= 0)
1365 close (backend_fd);
1366
1367#if EV_USE_PORT
1368 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1369#endif
1370#if EV_USE_KQUEUE
1371 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1372#endif
1373#if EV_USE_EPOLL
1374 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1375#endif
1376#if EV_USE_POLL
1377 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1378#endif
1379#if EV_USE_SELECT
1380 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1381#endif
1382
1383 for (i = NUMPRI; i--; )
1384 {
1385 array_free (pending, [i]);
1386#if EV_IDLE_ENABLE
1387 array_free (idle, [i]);
1388#endif
1389 }
1390
1391 ev_free (anfds); anfdmax = 0;
1392
1393 /* have to use the microsoft-never-gets-it-right macro */
1394 array_free (fdchange, EMPTY);
1395 array_free (timer, EMPTY);
1396#if EV_PERIODIC_ENABLE
1397 array_free (periodic, EMPTY);
1398#endif
1399#if EV_FORK_ENABLE
1400 array_free (fork, EMPTY);
1401#endif
1402 array_free (prepare, EMPTY);
1403 array_free (check, EMPTY);
1404#if EV_ASYNC_ENABLE
1405 array_free (async, EMPTY);
1406#endif
1407
1408 backend = 0;
1409}
1410
1411#if EV_USE_INOTIFY
1412void inline_size infy_fork (EV_P);
1413#endif
1414
1415void inline_size
1416loop_fork (EV_P)
1417{
1418#if EV_USE_PORT
1419 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1420#endif
1421#if EV_USE_KQUEUE
1422 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1423#endif
1424#if EV_USE_EPOLL
1425 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1426#endif
1427#if EV_USE_INOTIFY
1428 infy_fork (EV_A);
1429#endif
1430
1431 if (ev_is_active (&pipeev))
1432 {
1433 /* this "locks" the handlers against writing to the pipe */
1434 /* while we modify the fd vars */
1435 gotsig = 1;
1436#if EV_ASYNC_ENABLE
1437 gotasync = 1;
1438#endif
1439
1440 ev_ref (EV_A);
1441 ev_io_stop (EV_A_ &pipeev);
1442
1443#if EV_USE_EVENTFD
1444 if (evfd >= 0)
1445 close (evfd);
1446#endif
1447
1448 if (evpipe [0] >= 0)
1449 {
1450 close (evpipe [0]);
1451 close (evpipe [1]);
1452 }
1453
1454 evpipe_init (EV_A);
1455 /* now iterate over everything, in case we missed something */
1456 pipecb (EV_A_ &pipeev, EV_READ);
1457 }
1458
1459 postfork = 0;
1460}
1461
1462#if EV_MULTIPLICITY
1463struct ev_loop *
1464ev_loop_new (unsigned int flags)
1465{
1466 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1467
1468 memset (loop, 0, sizeof (struct ev_loop));
1469
1470 loop_init (EV_A_ flags);
1471
1472 if (ev_backend (EV_A))
1473 return loop;
1474
1475 return 0;
1476}
1477
1478void
1479ev_loop_destroy (EV_P)
1480{
1481 loop_destroy (EV_A);
1482 ev_free (loop);
1483}
1484
1485void
1486ev_loop_fork (EV_P)
1487{
1488 postfork = 1; /* must be in line with ev_default_fork */
1489}
1490#endif
1491
1492#if EV_MULTIPLICITY
1493struct ev_loop *
1494ev_default_loop_init (unsigned int flags)
1495#else
1496int
1497ev_default_loop (unsigned int flags)
1498#endif
1499{
1500 if (!ev_default_loop_ptr)
1501 {
1502#if EV_MULTIPLICITY
1503 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1504#else
1505 ev_default_loop_ptr = 1;
1506#endif
1507
1508 loop_init (EV_A_ flags);
1509
1510 if (ev_backend (EV_A))
1511 {
1512#ifndef _WIN32
1513 ev_signal_init (&childev, childcb, SIGCHLD);
1514 ev_set_priority (&childev, EV_MAXPRI);
1515 ev_signal_start (EV_A_ &childev);
1516 ev_unref (EV_A); /* child watcher should not keep loop alive */
1517#endif
1518 }
1519 else
1520 ev_default_loop_ptr = 0;
1521 }
1522
1523 return ev_default_loop_ptr;
1524}
1525
1526void
1527ev_default_destroy (void)
1528{
1529#if EV_MULTIPLICITY
1530 struct ev_loop *loop = ev_default_loop_ptr;
1531#endif
1532
1533#ifndef _WIN32
1534 ev_ref (EV_A); /* child watcher */
1535 ev_signal_stop (EV_A_ &childev);
1536#endif
1537
1538 loop_destroy (EV_A);
1539}
1540
1541void
1542ev_default_fork (void)
1543{
1544#if EV_MULTIPLICITY
1545 struct ev_loop *loop = ev_default_loop_ptr;
1546#endif
1547
1548 if (backend)
1549 postfork = 1; /* must be in line with ev_loop_fork */
430} 1550}
431 1551
432/*****************************************************************************/ 1552/*****************************************************************************/
433 1553
434void 1554void
435ev_prefork (void) 1555ev_invoke (EV_P_ void *w, int revents)
436{ 1556{
437 /* nop */ 1557 EV_CB_INVOKE ((W)w, revents);
438} 1558}
439 1559
440void 1560void inline_speed
441ev_postfork_parent (void) 1561call_pending (EV_P)
442{ 1562{
443 /* nop */
444}
445
446void
447ev_postfork_child (void)
448{
449#if HAVE_EPOLL
450 if (ev_method == EVMETHOD_EPOLL)
451 epoll_postfork_child ();
452#endif
453
454 evio_stop (&sigev);
455 close (sigpipe [0]);
456 close (sigpipe [1]);
457 pipe (sigpipe);
458 siginit ();
459}
460
461/*****************************************************************************/
462
463static void
464fd_reify (void)
465{
466 int i; 1563 int pri;
467 1564
468 for (i = 0; i < fdchangecnt; ++i) 1565 for (pri = NUMPRI; pri--; )
1566 while (pendingcnt [pri])
469 { 1567 {
470 int fd = fdchanges [i]; 1568 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
471 ANFD *anfd = anfds + fd;
472 struct ev_io *w;
473 1569
474 int wev = 0; 1570 if (expect_true (p->w))
1571 {
1572 /*assert (("non-pending watcher on pending list", p->w->pending));*/
475 1573
476 for (w = anfd->head; w; w = w->next) 1574 p->w->pending = 0;
477 wev |= w->events; 1575 EV_CB_INVOKE (p->w, p->events);
1576 }
1577 }
1578}
478 1579
479 if (anfd->wev != wev) 1580#if EV_IDLE_ENABLE
1581void inline_size
1582idle_reify (EV_P)
1583{
1584 if (expect_false (idleall))
1585 {
1586 int pri;
1587
1588 for (pri = NUMPRI; pri--; )
480 { 1589 {
481 method_modify (fd, anfd->wev, wev); 1590 if (pendingcnt [pri])
482 anfd->wev = wev; 1591 break;
1592
1593 if (idlecnt [pri])
1594 {
1595 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1596 break;
1597 }
483 } 1598 }
484 } 1599 }
485
486 fdchangecnt = 0;
487} 1600}
1601#endif
488 1602
489static void 1603void inline_size
490call_pending (void) 1604timers_reify (EV_P)
491{ 1605{
492 while (pendingcnt) 1606 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
493 {
494 ANPENDING *p = pendings + --pendingcnt;
495
496 if (p->w)
497 {
498 p->w->pending = 0;
499 p->w->cb (p->w, p->events);
500 }
501 } 1607 {
502} 1608 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
503 1609
504static void 1610 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
505timers_reify (void)
506{
507 while (timercnt && timers [0]->at <= now)
508 {
509 struct ev_timer *w = timers [0];
510
511 event ((W)w, EV_TIMEOUT);
512 1611
513 /* first reschedule or stop timer */ 1612 /* first reschedule or stop timer */
514 if (w->repeat) 1613 if (w->repeat)
515 { 1614 {
516 w->at = now + w->repeat; 1615 ev_at (w) += w->repeat;
517 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1616 if (ev_at (w) < mn_now)
1617 ev_at (w) = mn_now;
1618
1619 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1620
1621 ANHE_at_set (timers [HEAP0]);
518 downheap ((WT *)timers, timercnt, 0); 1622 downheap (timers, timercnt, HEAP0);
519 } 1623 }
520 else 1624 else
521 evtimer_stop (w); /* nonrepeating: stop timer */ 1625 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
522 }
523}
524 1626
525static void 1627 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1628 }
1629}
1630
1631#if EV_PERIODIC_ENABLE
1632void inline_size
526periodics_reify (void) 1633periodics_reify (EV_P)
527{ 1634{
528 while (periodiccnt && periodics [0]->at <= ev_now) 1635 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
529 { 1636 {
530 struct ev_periodic *w = periodics [0]; 1637 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1638
1639 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
531 1640
532 /* first reschedule or stop timer */ 1641 /* first reschedule or stop timer */
533 if (w->interval) 1642 if (w->reschedule_cb)
534 { 1643 {
535 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1644 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
536 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1645
1646 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1647
1648 ANHE_at_set (periodics [HEAP0]);
537 downheap ((WT *)periodics, periodiccnt, 0); 1649 downheap (periodics, periodiccnt, HEAP0);
1650 }
1651 else if (w->interval)
1652 {
1653 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1654 if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
1655
1656 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) >= ev_rt_now));
1657
1658 ANHE_at_set (periodics [HEAP0]);
1659 downheap (periodics, periodiccnt, HEAP0);
538 } 1660 }
539 else 1661 else
540 evperiodic_stop (w); /* nonrepeating: stop timer */ 1662 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
541 1663
542 event ((W)w, EV_TIMEOUT); 1664 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
543 } 1665 }
544} 1666}
545 1667
546static void 1668static void noinline
547periodics_reschedule (ev_tstamp diff) 1669periodics_reschedule (EV_P)
548{ 1670{
549 int i; 1671 int i;
550 1672
551 /* adjust periodics after time jump */ 1673 /* adjust periodics after time jump */
1674 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1675 {
1676 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1677
1678 if (w->reschedule_cb)
1679 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1680 else if (w->interval)
1681 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1682
1683 ANHE_at_set (periodics [i]);
1684 }
1685
1686 /* we don't use floyds algorithm, uphead is simpler and is more cache-efficient */
1687 /* also, this is easy and corretc for both 2-heaps and 4-heaps */
552 for (i = 0; i < periodiccnt; ++i) 1688 for (i = 0; i < periodiccnt; ++i)
553 { 1689 upheap (periodics, i + HEAP0);
554 struct ev_periodic *w = periodics [i]; 1690}
1691#endif
555 1692
556 if (w->interval) 1693void inline_speed
1694time_update (EV_P_ ev_tstamp max_block)
1695{
1696 int i;
1697
1698#if EV_USE_MONOTONIC
1699 if (expect_true (have_monotonic))
1700 {
1701 ev_tstamp odiff = rtmn_diff;
1702
1703 mn_now = get_clock ();
1704
1705 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1706 /* interpolate in the meantime */
1707 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
557 { 1708 {
558 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1709 ev_rt_now = rtmn_diff + mn_now;
1710 return;
1711 }
559 1712
560 if (fabs (diff) >= 1e-4) 1713 now_floor = mn_now;
1714 ev_rt_now = ev_time ();
1715
1716 /* loop a few times, before making important decisions.
1717 * on the choice of "4": one iteration isn't enough,
1718 * in case we get preempted during the calls to
1719 * ev_time and get_clock. a second call is almost guaranteed
1720 * to succeed in that case, though. and looping a few more times
1721 * doesn't hurt either as we only do this on time-jumps or
1722 * in the unlikely event of having been preempted here.
1723 */
1724 for (i = 4; --i; )
1725 {
1726 rtmn_diff = ev_rt_now - mn_now;
1727
1728 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1729 return; /* all is well */
1730
1731 ev_rt_now = ev_time ();
1732 mn_now = get_clock ();
1733 now_floor = mn_now;
1734 }
1735
1736# if EV_PERIODIC_ENABLE
1737 periodics_reschedule (EV_A);
1738# endif
1739 /* no timer adjustment, as the monotonic clock doesn't jump */
1740 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1741 }
1742 else
1743#endif
1744 {
1745 ev_rt_now = ev_time ();
1746
1747 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1748 {
1749#if EV_PERIODIC_ENABLE
1750 periodics_reschedule (EV_A);
1751#endif
1752 /* adjust timers. this is easy, as the offset is the same for all of them */
1753 for (i = 0; i < timercnt; ++i)
561 { 1754 {
562 evperiodic_stop (w); 1755 ANHE *he = timers + i + HEAP0;
563 evperiodic_start (w); 1756 ANHE_w (*he)->at += ev_rt_now - mn_now;
564 1757 ANHE_at_set (*he);
565 i = 0; /* restart loop, inefficient, but time jumps should be rare */
566 } 1758 }
567 } 1759 }
568 }
569}
570 1760
571static void 1761 mn_now = ev_rt_now;
572time_update (void)
573{
574 int i;
575
576 ev_now = ev_time ();
577
578 if (have_monotonic)
579 { 1762 }
580 ev_tstamp odiff = diff; 1763}
581 1764
582 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1765void
1766ev_ref (EV_P)
1767{
1768 ++activecnt;
1769}
1770
1771void
1772ev_unref (EV_P)
1773{
1774 --activecnt;
1775}
1776
1777static int loop_done;
1778
1779void
1780ev_loop (EV_P_ int flags)
1781{
1782 loop_done = EVUNLOOP_CANCEL;
1783
1784 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1785
1786 do
1787 {
1788#ifndef _WIN32
1789 if (expect_false (curpid)) /* penalise the forking check even more */
1790 if (expect_false (getpid () != curpid))
1791 {
1792 curpid = getpid ();
1793 postfork = 1;
1794 }
1795#endif
1796
1797#if EV_FORK_ENABLE
1798 /* we might have forked, so queue fork handlers */
1799 if (expect_false (postfork))
1800 if (forkcnt)
1801 {
1802 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1803 call_pending (EV_A);
1804 }
1805#endif
1806
1807 /* queue prepare watchers (and execute them) */
1808 if (expect_false (preparecnt))
583 { 1809 {
584 now = get_clock (); 1810 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
585 diff = ev_now - now; 1811 call_pending (EV_A);
586
587 if (fabs (odiff - diff) < MIN_TIMEJUMP)
588 return; /* all is well */
589
590 ev_now = ev_time ();
591 } 1812 }
592 1813
593 periodics_reschedule (diff - odiff); 1814 if (expect_false (!activecnt))
594 /* no timer adjustment, as the monotonic clock doesn't jump */ 1815 break;
595 }
596 else
597 {
598 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
599 {
600 periodics_reschedule (ev_now - now);
601 1816
602 /* adjust timers. this is easy, as the offset is the same for all */ 1817 /* we might have forked, so reify kernel state if necessary */
603 for (i = 0; i < timercnt; ++i) 1818 if (expect_false (postfork))
604 timers [i]->at += diff; 1819 loop_fork (EV_A);
605 }
606
607 now = ev_now;
608 }
609}
610
611int ev_loop_done;
612
613void ev_loop (int flags)
614{
615 double block;
616 ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
617
618 do
619 {
620 /* queue check watchers (and execute them) */
621 if (preparecnt)
622 {
623 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
624 call_pending ();
625 }
626 1820
627 /* update fd-related kernel structures */ 1821 /* update fd-related kernel structures */
628 fd_reify (); 1822 fd_reify (EV_A);
629 1823
630 /* calculate blocking time */ 1824 /* calculate blocking time */
1825 {
1826 ev_tstamp waittime = 0.;
1827 ev_tstamp sleeptime = 0.;
631 1828
632 /* we only need this for !monotonic clockor timers, but as we basically 1829 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
633 always have timers, we just calculate it always */
634 ev_now = ev_time ();
635
636 if (flags & EVLOOP_NONBLOCK || idlecnt)
637 block = 0.;
638 else
639 { 1830 {
1831 /* update time to cancel out callback processing overhead */
1832 time_update (EV_A_ 1e100);
1833
640 block = MAX_BLOCKTIME; 1834 waittime = MAX_BLOCKTIME;
641 1835
642 if (timercnt) 1836 if (timercnt)
643 { 1837 {
644 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 1838 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
645 if (block > to) block = to; 1839 if (waittime > to) waittime = to;
646 } 1840 }
647 1841
1842#if EV_PERIODIC_ENABLE
648 if (periodiccnt) 1843 if (periodiccnt)
649 { 1844 {
650 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1845 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
651 if (block > to) block = to; 1846 if (waittime > to) waittime = to;
652 } 1847 }
1848#endif
653 1849
654 if (block < 0.) block = 0.; 1850 if (expect_false (waittime < timeout_blocktime))
1851 waittime = timeout_blocktime;
1852
1853 sleeptime = waittime - backend_fudge;
1854
1855 if (expect_true (sleeptime > io_blocktime))
1856 sleeptime = io_blocktime;
1857
1858 if (sleeptime)
1859 {
1860 ev_sleep (sleeptime);
1861 waittime -= sleeptime;
1862 }
655 } 1863 }
656 1864
657 method_poll (block); 1865 ++loop_count;
1866 backend_poll (EV_A_ waittime);
658 1867
659 /* update ev_now, do magic */ 1868 /* update ev_rt_now, do magic */
660 time_update (); 1869 time_update (EV_A_ waittime + sleeptime);
1870 }
661 1871
662 /* queue pending timers and reschedule them */ 1872 /* queue pending timers and reschedule them */
663 timers_reify (); /* relative timers called last */ 1873 timers_reify (EV_A); /* relative timers called last */
1874#if EV_PERIODIC_ENABLE
664 periodics_reify (); /* absolute timers called first */ 1875 periodics_reify (EV_A); /* absolute timers called first */
1876#endif
665 1877
1878#if EV_IDLE_ENABLE
666 /* queue idle watchers unless io or timers are pending */ 1879 /* queue idle watchers unless other events are pending */
667 if (!pendingcnt) 1880 idle_reify (EV_A);
668 queue_events ((W *)idles, idlecnt, EV_IDLE); 1881#endif
669 1882
670 /* queue check watchers, to be executed first */ 1883 /* queue check watchers, to be executed first */
671 if (checkcnt) 1884 if (expect_false (checkcnt))
672 queue_events ((W *)checks, checkcnt, EV_CHECK); 1885 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
673 1886
674 call_pending (); 1887 call_pending (EV_A);
675 } 1888 }
676 while (!ev_loop_done); 1889 while (expect_true (
1890 activecnt
1891 && !loop_done
1892 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1893 ));
677 1894
678 if (ev_loop_done != 2) 1895 if (loop_done == EVUNLOOP_ONE)
1896 loop_done = EVUNLOOP_CANCEL;
1897}
1898
1899void
1900ev_unloop (EV_P_ int how)
1901{
679 ev_loop_done = 0; 1902 loop_done = how;
680} 1903}
681 1904
682/*****************************************************************************/ 1905/*****************************************************************************/
683 1906
684static void 1907void inline_size
685wlist_add (WL *head, WL elem) 1908wlist_add (WL *head, WL elem)
686{ 1909{
687 elem->next = *head; 1910 elem->next = *head;
688 *head = elem; 1911 *head = elem;
689} 1912}
690 1913
691static void 1914void inline_size
692wlist_del (WL *head, WL elem) 1915wlist_del (WL *head, WL elem)
693{ 1916{
694 while (*head) 1917 while (*head)
695 { 1918 {
696 if (*head == elem) 1919 if (*head == elem)
… …
701 1924
702 head = &(*head)->next; 1925 head = &(*head)->next;
703 } 1926 }
704} 1927}
705 1928
706static void 1929void inline_speed
707ev_clear (W w) 1930clear_pending (EV_P_ W w)
708{ 1931{
709 if (w->pending) 1932 if (w->pending)
710 { 1933 {
711 pendings [w->pending - 1].w = 0; 1934 pendings [ABSPRI (w)][w->pending - 1].w = 0;
712 w->pending = 0; 1935 w->pending = 0;
713 } 1936 }
714} 1937}
715 1938
716static void 1939int
1940ev_clear_pending (EV_P_ void *w)
1941{
1942 W w_ = (W)w;
1943 int pending = w_->pending;
1944
1945 if (expect_true (pending))
1946 {
1947 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1948 w_->pending = 0;
1949 p->w = 0;
1950 return p->events;
1951 }
1952 else
1953 return 0;
1954}
1955
1956void inline_size
1957pri_adjust (EV_P_ W w)
1958{
1959 int pri = w->priority;
1960 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1961 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1962 w->priority = pri;
1963}
1964
1965void inline_speed
717ev_start (W w, int active) 1966ev_start (EV_P_ W w, int active)
718{ 1967{
1968 pri_adjust (EV_A_ w);
719 w->active = active; 1969 w->active = active;
1970 ev_ref (EV_A);
720} 1971}
721 1972
722static void 1973void inline_size
723ev_stop (W w) 1974ev_stop (EV_P_ W w)
724{ 1975{
1976 ev_unref (EV_A);
725 w->active = 0; 1977 w->active = 0;
726} 1978}
727 1979
728/*****************************************************************************/ 1980/*****************************************************************************/
729 1981
730void 1982void noinline
731evio_start (struct ev_io *w) 1983ev_io_start (EV_P_ ev_io *w)
732{ 1984{
1985 int fd = w->fd;
1986
733 if (ev_is_active (w)) 1987 if (expect_false (ev_is_active (w)))
734 return; 1988 return;
735 1989
736 int fd = w->fd; 1990 assert (("ev_io_start called with negative fd", fd >= 0));
737 1991
738 ev_start ((W)w, 1); 1992 ev_start (EV_A_ (W)w, 1);
739 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1993 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
740 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1994 wlist_add (&anfds[fd].head, (WL)w);
741 1995
742 ++fdchangecnt; 1996 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
743 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1997 w->events &= ~EV_IOFDSET;
744 fdchanges [fdchangecnt - 1] = fd;
745} 1998}
746 1999
747void 2000void noinline
748evio_stop (struct ev_io *w) 2001ev_io_stop (EV_P_ ev_io *w)
749{ 2002{
750 ev_clear ((W)w); 2003 clear_pending (EV_A_ (W)w);
751 if (!ev_is_active (w)) 2004 if (expect_false (!ev_is_active (w)))
752 return; 2005 return;
753 2006
2007 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2008
754 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2009 wlist_del (&anfds[w->fd].head, (WL)w);
755 ev_stop ((W)w); 2010 ev_stop (EV_A_ (W)w);
756 2011
757 ++fdchangecnt; 2012 fd_change (EV_A_ w->fd, 1);
758 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
759 fdchanges [fdchangecnt - 1] = w->fd;
760} 2013}
761 2014
762void 2015void noinline
763evtimer_start (struct ev_timer *w) 2016ev_timer_start (EV_P_ ev_timer *w)
764{ 2017{
765 if (ev_is_active (w)) 2018 if (expect_false (ev_is_active (w)))
766 return; 2019 return;
767 2020
768 w->at += now; 2021 ev_at (w) += mn_now;
769 2022
770 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 2023 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
771 2024
772 ev_start ((W)w, ++timercnt); 2025 ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
773 array_needsize (timers, timermax, timercnt, ); 2026 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
774 timers [timercnt - 1] = w; 2027 ANHE_w (timers [ev_active (w)]) = (WT)w;
775 upheap ((WT *)timers, timercnt - 1); 2028 ANHE_at_set (timers [ev_active (w)]);
776} 2029 upheap (timers, ev_active (w));
777 2030
778void 2031 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2032}
2033
2034void noinline
779evtimer_stop (struct ev_timer *w) 2035ev_timer_stop (EV_P_ ev_timer *w)
780{ 2036{
781 ev_clear ((W)w); 2037 clear_pending (EV_A_ (W)w);
782 if (!ev_is_active (w)) 2038 if (expect_false (!ev_is_active (w)))
783 return; 2039 return;
784 2040
785 if (w->active < timercnt--) 2041 {
2042 int active = ev_active (w);
2043
2044 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2045
2046 if (expect_true (active < timercnt + HEAP0 - 1))
786 { 2047 {
787 timers [w->active - 1] = timers [timercnt]; 2048 timers [active] = timers [timercnt + HEAP0 - 1];
788 downheap ((WT *)timers, timercnt, w->active - 1); 2049 adjustheap (timers, timercnt, active);
789 } 2050 }
790 2051
791 w->at = w->repeat; 2052 --timercnt;
2053 }
792 2054
2055 ev_at (w) -= mn_now;
2056
793 ev_stop ((W)w); 2057 ev_stop (EV_A_ (W)w);
794} 2058}
795 2059
796void 2060void noinline
797evtimer_again (struct ev_timer *w) 2061ev_timer_again (EV_P_ ev_timer *w)
798{ 2062{
799 if (ev_is_active (w)) 2063 if (ev_is_active (w))
800 { 2064 {
801 if (w->repeat) 2065 if (w->repeat)
802 { 2066 {
803 w->at = now + w->repeat; 2067 ev_at (w) = mn_now + w->repeat;
2068 ANHE_at_set (timers [ev_active (w)]);
804 downheap ((WT *)timers, timercnt, w->active - 1); 2069 adjustheap (timers, timercnt, ev_active (w));
805 } 2070 }
806 else 2071 else
807 evtimer_stop (w); 2072 ev_timer_stop (EV_A_ w);
808 } 2073 }
809 else if (w->repeat) 2074 else if (w->repeat)
2075 {
2076 ev_at (w) = w->repeat;
810 evtimer_start (w); 2077 ev_timer_start (EV_A_ w);
2078 }
811} 2079}
812 2080
813void 2081#if EV_PERIODIC_ENABLE
2082void noinline
814evperiodic_start (struct ev_periodic *w) 2083ev_periodic_start (EV_P_ ev_periodic *w)
815{ 2084{
816 if (ev_is_active (w)) 2085 if (expect_false (ev_is_active (w)))
817 return; 2086 return;
818 2087
819 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 2088 if (w->reschedule_cb)
820 2089 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2090 else if (w->interval)
2091 {
2092 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
821 /* this formula differs from the one in periodic_reify because we do not always round up */ 2093 /* this formula differs from the one in periodic_reify because we do not always round up */
822 if (w->interval)
823 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 2094 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2095 }
2096 else
2097 ev_at (w) = w->offset;
824 2098
825 ev_start ((W)w, ++periodiccnt); 2099 ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
826 array_needsize (periodics, periodicmax, periodiccnt, ); 2100 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
827 periodics [periodiccnt - 1] = w; 2101 ANHE_w (periodics [ev_active (w)]) = (WT)w;
828 upheap ((WT *)periodics, periodiccnt - 1); 2102 ANHE_at_set (periodics [ev_active (w)]);
829} 2103 upheap (periodics, ev_active (w));
830 2104
831void 2105 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2106}
2107
2108void noinline
832evperiodic_stop (struct ev_periodic *w) 2109ev_periodic_stop (EV_P_ ev_periodic *w)
833{ 2110{
834 ev_clear ((W)w); 2111 clear_pending (EV_A_ (W)w);
835 if (!ev_is_active (w)) 2112 if (expect_false (!ev_is_active (w)))
836 return; 2113 return;
837 2114
838 if (w->active < periodiccnt--) 2115 {
2116 int active = ev_active (w);
2117
2118 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2119
2120 if (expect_true (active < periodiccnt + HEAP0 - 1))
839 { 2121 {
840 periodics [w->active - 1] = periodics [periodiccnt]; 2122 periodics [active] = periodics [periodiccnt + HEAP0 - 1];
841 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2123 adjustheap (periodics, periodiccnt, active);
842 } 2124 }
843 2125
2126 --periodiccnt;
2127 }
2128
844 ev_stop ((W)w); 2129 ev_stop (EV_A_ (W)w);
845} 2130}
846 2131
847void 2132void noinline
2133ev_periodic_again (EV_P_ ev_periodic *w)
2134{
2135 /* TODO: use adjustheap and recalculation */
2136 ev_periodic_stop (EV_A_ w);
2137 ev_periodic_start (EV_A_ w);
2138}
2139#endif
2140
2141#ifndef SA_RESTART
2142# define SA_RESTART 0
2143#endif
2144
2145void noinline
848evsignal_start (struct ev_signal *w) 2146ev_signal_start (EV_P_ ev_signal *w)
849{ 2147{
2148#if EV_MULTIPLICITY
2149 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2150#endif
850 if (ev_is_active (w)) 2151 if (expect_false (ev_is_active (w)))
851 return; 2152 return;
852 2153
853 ev_start ((W)w, 1); 2154 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2155
2156 evpipe_init (EV_A);
2157
2158 {
2159#ifndef _WIN32
2160 sigset_t full, prev;
2161 sigfillset (&full);
2162 sigprocmask (SIG_SETMASK, &full, &prev);
2163#endif
2164
854 array_needsize (signals, signalmax, w->signum, signals_init); 2165 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2166
2167#ifndef _WIN32
2168 sigprocmask (SIG_SETMASK, &prev, 0);
2169#endif
2170 }
2171
2172 ev_start (EV_A_ (W)w, 1);
855 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2173 wlist_add (&signals [w->signum - 1].head, (WL)w);
856 2174
857 if (!w->next) 2175 if (!((WL)w)->next)
858 { 2176 {
2177#if _WIN32
2178 signal (w->signum, ev_sighandler);
2179#else
859 struct sigaction sa; 2180 struct sigaction sa;
860 sa.sa_handler = sighandler; 2181 sa.sa_handler = ev_sighandler;
861 sigfillset (&sa.sa_mask); 2182 sigfillset (&sa.sa_mask);
862 sa.sa_flags = 0; 2183 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
863 sigaction (w->signum, &sa, 0); 2184 sigaction (w->signum, &sa, 0);
2185#endif
864 } 2186 }
865} 2187}
866 2188
867void 2189void noinline
868evsignal_stop (struct ev_signal *w) 2190ev_signal_stop (EV_P_ ev_signal *w)
869{ 2191{
870 ev_clear ((W)w); 2192 clear_pending (EV_A_ (W)w);
871 if (!ev_is_active (w)) 2193 if (expect_false (!ev_is_active (w)))
872 return; 2194 return;
873 2195
874 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2196 wlist_del (&signals [w->signum - 1].head, (WL)w);
875 ev_stop ((W)w); 2197 ev_stop (EV_A_ (W)w);
876 2198
877 if (!signals [w->signum - 1].head) 2199 if (!signals [w->signum - 1].head)
878 signal (w->signum, SIG_DFL); 2200 signal (w->signum, SIG_DFL);
879} 2201}
880 2202
881void evidle_start (struct ev_idle *w) 2203void
2204ev_child_start (EV_P_ ev_child *w)
882{ 2205{
2206#if EV_MULTIPLICITY
2207 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2208#endif
883 if (ev_is_active (w)) 2209 if (expect_false (ev_is_active (w)))
884 return; 2210 return;
885 2211
886 ev_start ((W)w, ++idlecnt); 2212 ev_start (EV_A_ (W)w, 1);
887 array_needsize (idles, idlemax, idlecnt, ); 2213 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
888 idles [idlecnt - 1] = w;
889} 2214}
890 2215
891void evidle_stop (struct ev_idle *w) 2216void
2217ev_child_stop (EV_P_ ev_child *w)
892{ 2218{
893 ev_clear ((W)w); 2219 clear_pending (EV_A_ (W)w);
894 if (ev_is_active (w)) 2220 if (expect_false (!ev_is_active (w)))
895 return; 2221 return;
896 2222
897 idles [w->active - 1] = idles [--idlecnt]; 2223 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
898 ev_stop ((W)w); 2224 ev_stop (EV_A_ (W)w);
899} 2225}
900 2226
901void evprepare_start (struct ev_prepare *w) 2227#if EV_STAT_ENABLE
2228
2229# ifdef _WIN32
2230# undef lstat
2231# define lstat(a,b) _stati64 (a,b)
2232# endif
2233
2234#define DEF_STAT_INTERVAL 5.0074891
2235#define MIN_STAT_INTERVAL 0.1074891
2236
2237static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2238
2239#if EV_USE_INOTIFY
2240# define EV_INOTIFY_BUFSIZE 8192
2241
2242static void noinline
2243infy_add (EV_P_ ev_stat *w)
902{ 2244{
903 if (ev_is_active (w)) 2245 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);
2246
2247 if (w->wd < 0)
2248 {
2249 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2250
2251 /* monitor some parent directory for speedup hints */
2252 /* note that exceeding the hardcoded limit is not a correctness issue, */
2253 /* but an efficiency issue only */
2254 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2255 {
2256 char path [4096];
2257 strcpy (path, w->path);
2258
2259 do
2260 {
2261 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2262 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2263
2264 char *pend = strrchr (path, '/');
2265
2266 if (!pend)
2267 break; /* whoops, no '/', complain to your admin */
2268
2269 *pend = 0;
2270 w->wd = inotify_add_watch (fs_fd, path, mask);
2271 }
2272 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2273 }
2274 }
2275 else
2276 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2277
2278 if (w->wd >= 0)
2279 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2280}
2281
2282static void noinline
2283infy_del (EV_P_ ev_stat *w)
2284{
2285 int slot;
2286 int wd = w->wd;
2287
2288 if (wd < 0)
904 return; 2289 return;
905 2290
2291 w->wd = -2;
2292 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2293 wlist_del (&fs_hash [slot].head, (WL)w);
2294
2295 /* remove this watcher, if others are watching it, they will rearm */
2296 inotify_rm_watch (fs_fd, wd);
2297}
2298
2299static void noinline
2300infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2301{
2302 if (slot < 0)
2303 /* overflow, need to check for all hahs slots */
2304 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2305 infy_wd (EV_A_ slot, wd, ev);
2306 else
2307 {
2308 WL w_;
2309
2310 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2311 {
2312 ev_stat *w = (ev_stat *)w_;
2313 w_ = w_->next; /* lets us remove this watcher and all before it */
2314
2315 if (w->wd == wd || wd == -1)
2316 {
2317 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2318 {
2319 w->wd = -1;
2320 infy_add (EV_A_ w); /* re-add, no matter what */
2321 }
2322
2323 stat_timer_cb (EV_A_ &w->timer, 0);
2324 }
2325 }
2326 }
2327}
2328
2329static void
2330infy_cb (EV_P_ ev_io *w, int revents)
2331{
2332 char buf [EV_INOTIFY_BUFSIZE];
2333 struct inotify_event *ev = (struct inotify_event *)buf;
2334 int ofs;
2335 int len = read (fs_fd, buf, sizeof (buf));
2336
2337 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2338 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2339}
2340
2341void inline_size
2342infy_init (EV_P)
2343{
2344 if (fs_fd != -2)
2345 return;
2346
2347 fs_fd = inotify_init ();
2348
2349 if (fs_fd >= 0)
2350 {
2351 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2352 ev_set_priority (&fs_w, EV_MAXPRI);
2353 ev_io_start (EV_A_ &fs_w);
2354 }
2355}
2356
2357void inline_size
2358infy_fork (EV_P)
2359{
2360 int slot;
2361
2362 if (fs_fd < 0)
2363 return;
2364
2365 close (fs_fd);
2366 fs_fd = inotify_init ();
2367
2368 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2369 {
2370 WL w_ = fs_hash [slot].head;
2371 fs_hash [slot].head = 0;
2372
2373 while (w_)
2374 {
2375 ev_stat *w = (ev_stat *)w_;
2376 w_ = w_->next; /* lets us add this watcher */
2377
2378 w->wd = -1;
2379
2380 if (fs_fd >= 0)
2381 infy_add (EV_A_ w); /* re-add, no matter what */
2382 else
2383 ev_timer_start (EV_A_ &w->timer);
2384 }
2385
2386 }
2387}
2388
2389#endif
2390
2391void
2392ev_stat_stat (EV_P_ ev_stat *w)
2393{
2394 if (lstat (w->path, &w->attr) < 0)
2395 w->attr.st_nlink = 0;
2396 else if (!w->attr.st_nlink)
2397 w->attr.st_nlink = 1;
2398}
2399
2400static void noinline
2401stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2402{
2403 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2404
2405 /* we copy this here each the time so that */
2406 /* prev has the old value when the callback gets invoked */
2407 w->prev = w->attr;
2408 ev_stat_stat (EV_A_ w);
2409
2410 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2411 if (
2412 w->prev.st_dev != w->attr.st_dev
2413 || w->prev.st_ino != w->attr.st_ino
2414 || w->prev.st_mode != w->attr.st_mode
2415 || w->prev.st_nlink != w->attr.st_nlink
2416 || w->prev.st_uid != w->attr.st_uid
2417 || w->prev.st_gid != w->attr.st_gid
2418 || w->prev.st_rdev != w->attr.st_rdev
2419 || w->prev.st_size != w->attr.st_size
2420 || w->prev.st_atime != w->attr.st_atime
2421 || w->prev.st_mtime != w->attr.st_mtime
2422 || w->prev.st_ctime != w->attr.st_ctime
2423 ) {
2424 #if EV_USE_INOTIFY
2425 infy_del (EV_A_ w);
2426 infy_add (EV_A_ w);
2427 ev_stat_stat (EV_A_ w); /* avoid race... */
2428 #endif
2429
2430 ev_feed_event (EV_A_ w, EV_STAT);
2431 }
2432}
2433
2434void
2435ev_stat_start (EV_P_ ev_stat *w)
2436{
2437 if (expect_false (ev_is_active (w)))
2438 return;
2439
2440 /* since we use memcmp, we need to clear any padding data etc. */
2441 memset (&w->prev, 0, sizeof (ev_statdata));
2442 memset (&w->attr, 0, sizeof (ev_statdata));
2443
2444 ev_stat_stat (EV_A_ w);
2445
2446 if (w->interval < MIN_STAT_INTERVAL)
2447 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2448
2449 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2450 ev_set_priority (&w->timer, ev_priority (w));
2451
2452#if EV_USE_INOTIFY
2453 infy_init (EV_A);
2454
2455 if (fs_fd >= 0)
2456 infy_add (EV_A_ w);
2457 else
2458#endif
2459 ev_timer_start (EV_A_ &w->timer);
2460
2461 ev_start (EV_A_ (W)w, 1);
2462}
2463
2464void
2465ev_stat_stop (EV_P_ ev_stat *w)
2466{
2467 clear_pending (EV_A_ (W)w);
2468 if (expect_false (!ev_is_active (w)))
2469 return;
2470
2471#if EV_USE_INOTIFY
2472 infy_del (EV_A_ w);
2473#endif
2474 ev_timer_stop (EV_A_ &w->timer);
2475
2476 ev_stop (EV_A_ (W)w);
2477}
2478#endif
2479
2480#if EV_IDLE_ENABLE
2481void
2482ev_idle_start (EV_P_ ev_idle *w)
2483{
2484 if (expect_false (ev_is_active (w)))
2485 return;
2486
2487 pri_adjust (EV_A_ (W)w);
2488
2489 {
2490 int active = ++idlecnt [ABSPRI (w)];
2491
2492 ++idleall;
2493 ev_start (EV_A_ (W)w, active);
2494
2495 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2496 idles [ABSPRI (w)][active - 1] = w;
2497 }
2498}
2499
2500void
2501ev_idle_stop (EV_P_ ev_idle *w)
2502{
2503 clear_pending (EV_A_ (W)w);
2504 if (expect_false (!ev_is_active (w)))
2505 return;
2506
2507 {
2508 int active = ev_active (w);
2509
2510 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2511 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2512
2513 ev_stop (EV_A_ (W)w);
2514 --idleall;
2515 }
2516}
2517#endif
2518
2519void
2520ev_prepare_start (EV_P_ ev_prepare *w)
2521{
2522 if (expect_false (ev_is_active (w)))
2523 return;
2524
906 ev_start ((W)w, ++preparecnt); 2525 ev_start (EV_A_ (W)w, ++preparecnt);
907 array_needsize (prepares, preparemax, preparecnt, ); 2526 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
908 prepares [preparecnt - 1] = w; 2527 prepares [preparecnt - 1] = w;
909} 2528}
910 2529
2530void
911void evprepare_stop (struct ev_prepare *w) 2531ev_prepare_stop (EV_P_ ev_prepare *w)
912{ 2532{
913 ev_clear ((W)w); 2533 clear_pending (EV_A_ (W)w);
914 if (ev_is_active (w)) 2534 if (expect_false (!ev_is_active (w)))
915 return; 2535 return;
916 2536
2537 {
2538 int active = ev_active (w);
2539
917 prepares [w->active - 1] = prepares [--preparecnt]; 2540 prepares [active - 1] = prepares [--preparecnt];
2541 ev_active (prepares [active - 1]) = active;
2542 }
2543
918 ev_stop ((W)w); 2544 ev_stop (EV_A_ (W)w);
919} 2545}
920 2546
2547void
921void evcheck_start (struct ev_check *w) 2548ev_check_start (EV_P_ ev_check *w)
922{ 2549{
923 if (ev_is_active (w)) 2550 if (expect_false (ev_is_active (w)))
924 return; 2551 return;
925 2552
926 ev_start ((W)w, ++checkcnt); 2553 ev_start (EV_A_ (W)w, ++checkcnt);
927 array_needsize (checks, checkmax, checkcnt, ); 2554 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
928 checks [checkcnt - 1] = w; 2555 checks [checkcnt - 1] = w;
929} 2556}
930 2557
2558void
931void evcheck_stop (struct ev_check *w) 2559ev_check_stop (EV_P_ ev_check *w)
932{ 2560{
933 ev_clear ((W)w); 2561 clear_pending (EV_A_ (W)w);
934 if (ev_is_active (w)) 2562 if (expect_false (!ev_is_active (w)))
935 return; 2563 return;
936 2564
2565 {
2566 int active = ev_active (w);
2567
937 checks [w->active - 1] = checks [--checkcnt]; 2568 checks [active - 1] = checks [--checkcnt];
2569 ev_active (checks [active - 1]) = active;
2570 }
2571
938 ev_stop ((W)w); 2572 ev_stop (EV_A_ (W)w);
939} 2573}
940 2574
941void evchild_start (struct ev_child *w) 2575#if EV_EMBED_ENABLE
2576void noinline
2577ev_embed_sweep (EV_P_ ev_embed *w)
942{ 2578{
2579 ev_loop (w->other, EVLOOP_NONBLOCK);
2580}
2581
2582static void
2583embed_io_cb (EV_P_ ev_io *io, int revents)
2584{
2585 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2586
943 if (ev_is_active (w)) 2587 if (ev_cb (w))
2588 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2589 else
2590 ev_loop (w->other, EVLOOP_NONBLOCK);
2591}
2592
2593static void
2594embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2595{
2596 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2597
2598 {
2599 struct ev_loop *loop = w->other;
2600
2601 while (fdchangecnt)
2602 {
2603 fd_reify (EV_A);
2604 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2605 }
2606 }
2607}
2608
2609#if 0
2610static void
2611embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2612{
2613 ev_idle_stop (EV_A_ idle);
2614}
2615#endif
2616
2617void
2618ev_embed_start (EV_P_ ev_embed *w)
2619{
2620 if (expect_false (ev_is_active (w)))
944 return; 2621 return;
945 2622
2623 {
2624 struct ev_loop *loop = w->other;
2625 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2626 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2627 }
2628
2629 ev_set_priority (&w->io, ev_priority (w));
2630 ev_io_start (EV_A_ &w->io);
2631
2632 ev_prepare_init (&w->prepare, embed_prepare_cb);
2633 ev_set_priority (&w->prepare, EV_MINPRI);
2634 ev_prepare_start (EV_A_ &w->prepare);
2635
2636 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2637
946 ev_start ((W)w, 1); 2638 ev_start (EV_A_ (W)w, 1);
947 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
948} 2639}
949 2640
950void evchild_stop (struct ev_child *w) 2641void
2642ev_embed_stop (EV_P_ ev_embed *w)
951{ 2643{
952 ev_clear ((W)w); 2644 clear_pending (EV_A_ (W)w);
953 if (ev_is_active (w)) 2645 if (expect_false (!ev_is_active (w)))
954 return; 2646 return;
955 2647
956 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2648 ev_io_stop (EV_A_ &w->io);
2649 ev_prepare_stop (EV_A_ &w->prepare);
2650
957 ev_stop ((W)w); 2651 ev_stop (EV_A_ (W)w);
958} 2652}
2653#endif
2654
2655#if EV_FORK_ENABLE
2656void
2657ev_fork_start (EV_P_ ev_fork *w)
2658{
2659 if (expect_false (ev_is_active (w)))
2660 return;
2661
2662 ev_start (EV_A_ (W)w, ++forkcnt);
2663 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2664 forks [forkcnt - 1] = w;
2665}
2666
2667void
2668ev_fork_stop (EV_P_ ev_fork *w)
2669{
2670 clear_pending (EV_A_ (W)w);
2671 if (expect_false (!ev_is_active (w)))
2672 return;
2673
2674 {
2675 int active = ev_active (w);
2676
2677 forks [active - 1] = forks [--forkcnt];
2678 ev_active (forks [active - 1]) = active;
2679 }
2680
2681 ev_stop (EV_A_ (W)w);
2682}
2683#endif
2684
2685#if EV_ASYNC_ENABLE
2686void
2687ev_async_start (EV_P_ ev_async *w)
2688{
2689 if (expect_false (ev_is_active (w)))
2690 return;
2691
2692 evpipe_init (EV_A);
2693
2694 ev_start (EV_A_ (W)w, ++asynccnt);
2695 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2696 asyncs [asynccnt - 1] = w;
2697}
2698
2699void
2700ev_async_stop (EV_P_ ev_async *w)
2701{
2702 clear_pending (EV_A_ (W)w);
2703 if (expect_false (!ev_is_active (w)))
2704 return;
2705
2706 {
2707 int active = ev_active (w);
2708
2709 asyncs [active - 1] = asyncs [--asynccnt];
2710 ev_active (asyncs [active - 1]) = active;
2711 }
2712
2713 ev_stop (EV_A_ (W)w);
2714}
2715
2716void
2717ev_async_send (EV_P_ ev_async *w)
2718{
2719 w->sent = 1;
2720 evpipe_write (EV_A_ &gotasync);
2721}
2722#endif
959 2723
960/*****************************************************************************/ 2724/*****************************************************************************/
961 2725
962struct ev_once 2726struct ev_once
963{ 2727{
964 struct ev_io io; 2728 ev_io io;
965 struct ev_timer to; 2729 ev_timer to;
966 void (*cb)(int revents, void *arg); 2730 void (*cb)(int revents, void *arg);
967 void *arg; 2731 void *arg;
968}; 2732};
969 2733
970static void 2734static void
971once_cb (struct ev_once *once, int revents) 2735once_cb (EV_P_ struct ev_once *once, int revents)
972{ 2736{
973 void (*cb)(int revents, void *arg) = once->cb; 2737 void (*cb)(int revents, void *arg) = once->cb;
974 void *arg = once->arg; 2738 void *arg = once->arg;
975 2739
976 evio_stop (&once->io); 2740 ev_io_stop (EV_A_ &once->io);
977 evtimer_stop (&once->to); 2741 ev_timer_stop (EV_A_ &once->to);
978 free (once); 2742 ev_free (once);
979 2743
980 cb (revents, arg); 2744 cb (revents, arg);
981} 2745}
982 2746
983static void 2747static void
984once_cb_io (struct ev_io *w, int revents) 2748once_cb_io (EV_P_ ev_io *w, int revents)
985{ 2749{
986 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2750 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
987} 2751}
988 2752
989static void 2753static void
990once_cb_to (struct ev_timer *w, int revents) 2754once_cb_to (EV_P_ ev_timer *w, int revents)
991{ 2755{
992 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2756 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
993} 2757}
994 2758
995void 2759void
996ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2760ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
997{ 2761{
998 struct ev_once *once = malloc (sizeof (struct ev_once)); 2762 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
999 2763
1000 if (!once) 2764 if (expect_false (!once))
1001 cb (EV_ERROR, arg); 2765 {
1002 else 2766 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
2767 return;
1003 { 2768 }
2769
1004 once->cb = cb; 2770 once->cb = cb;
1005 once->arg = arg; 2771 once->arg = arg;
1006 2772
1007 evw_init (&once->io, once_cb_io); 2773 ev_init (&once->io, once_cb_io);
1008
1009 if (fd >= 0) 2774 if (fd >= 0)
1010 { 2775 {
1011 evio_set (&once->io, fd, events); 2776 ev_io_set (&once->io, fd, events);
1012 evio_start (&once->io); 2777 ev_io_start (EV_A_ &once->io);
1013 } 2778 }
1014 2779
1015 evw_init (&once->to, once_cb_to); 2780 ev_init (&once->to, once_cb_to);
1016
1017 if (timeout >= 0.) 2781 if (timeout >= 0.)
1018 { 2782 {
1019 evtimer_set (&once->to, timeout, 0.); 2783 ev_timer_set (&once->to, timeout, 0.);
1020 evtimer_start (&once->to); 2784 ev_timer_start (EV_A_ &once->to);
1021 }
1022 }
1023}
1024
1025/*****************************************************************************/
1026
1027#if 0
1028
1029struct ev_io wio;
1030
1031static void
1032sin_cb (struct ev_io *w, int revents)
1033{
1034 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1035}
1036
1037static void
1038ocb (struct ev_timer *w, int revents)
1039{
1040 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1041 evtimer_stop (w);
1042 evtimer_start (w);
1043}
1044
1045static void
1046scb (struct ev_signal *w, int revents)
1047{
1048 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1049 evio_stop (&wio);
1050 evio_start (&wio);
1051}
1052
1053static void
1054gcb (struct ev_signal *w, int revents)
1055{
1056 fprintf (stderr, "generic %x\n", revents);
1057
1058}
1059
1060int main (void)
1061{
1062 ev_init (0);
1063
1064 evio_init (&wio, sin_cb, 0, EV_READ);
1065 evio_start (&wio);
1066
1067 struct ev_timer t[10000];
1068
1069#if 0
1070 int i;
1071 for (i = 0; i < 10000; ++i)
1072 { 2785 }
1073 struct ev_timer *w = t + i;
1074 evw_init (w, ocb, i);
1075 evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1076 evtimer_start (w);
1077 if (drand48 () < 0.5)
1078 evtimer_stop (w);
1079 }
1080#endif
1081
1082 struct ev_timer t1;
1083 evtimer_init (&t1, ocb, 5, 10);
1084 evtimer_start (&t1);
1085
1086 struct ev_signal sig;
1087 evsignal_init (&sig, scb, SIGQUIT);
1088 evsignal_start (&sig);
1089
1090 struct ev_check cw;
1091 evcheck_init (&cw, gcb);
1092 evcheck_start (&cw);
1093
1094 struct ev_idle iw;
1095 evidle_init (&iw, gcb);
1096 evidle_start (&iw);
1097
1098 ev_loop (0);
1099
1100 return 0;
1101} 2786}
1102 2787
2788#if EV_MULTIPLICITY
2789 #include "ev_wrap.h"
1103#endif 2790#endif
1104 2791
2792#ifdef __cplusplus
2793}
2794#endif
1105 2795
1106
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