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Comparing libev/ev.c (file contents):
Revision 1.18 by root, Wed Oct 31 16:29:52 2007 UTC vs.
Revision 1.267 by root, Mon Oct 27 11:08:29 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#define HAVE_EPOLL 1 146#include <signal.h>
45 147
46#ifndef HAVE_MONOTONIC 148#ifdef EV_H
47# ifdef CLOCK_MONOTONIC 149# include EV_H
48# define HAVE_MONOTONIC 1 150#else
151# include "ev.h"
152#endif
153
154#ifndef _WIN32
155# include <sys/time.h>
156# include <sys/wait.h>
157# include <unistd.h>
158#else
159# include <io.h>
160# define WIN32_LEAN_AND_MEAN
161# include <windows.h>
162# ifndef EV_SELECT_IS_WINSOCKET
163# define EV_SELECT_IS_WINSOCKET 1
49# endif 164# endif
50#endif 165#endif
51 166
52#ifndef HAVE_SELECT 167/* this block tries to deduce configuration from header-defined symbols and defaults */
53# define HAVE_SELECT 1 168
169#ifndef EV_USE_MONOTONIC
170# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
171# define EV_USE_MONOTONIC 1
172# else
173# define EV_USE_MONOTONIC 0
54#endif 174# endif
175#endif
55 176
56#ifndef HAVE_EPOLL 177#ifndef EV_USE_REALTIME
57# define HAVE_EPOLL 0 178# define EV_USE_REALTIME 0
179#endif
180
181#ifndef EV_USE_NANOSLEEP
182# if _POSIX_C_SOURCE >= 199309L
183# define EV_USE_NANOSLEEP 1
184# else
185# define EV_USE_NANOSLEEP 0
58#endif 186# endif
187#endif
59 188
60#ifndef HAVE_REALTIME 189#ifndef EV_USE_SELECT
61# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ 190# define EV_USE_SELECT 1
191#endif
192
193#ifndef EV_USE_POLL
194# ifdef _WIN32
195# define EV_USE_POLL 0
196# else
197# define EV_USE_POLL 1
62#endif 198# endif
199#endif
200
201#ifndef EV_USE_EPOLL
202# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
203# define EV_USE_EPOLL 1
204# else
205# define EV_USE_EPOLL 0
206# endif
207#endif
208
209#ifndef EV_USE_KQUEUE
210# define EV_USE_KQUEUE 0
211#endif
212
213#ifndef EV_USE_PORT
214# define EV_USE_PORT 0
215#endif
216
217#ifndef EV_USE_INOTIFY
218# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
219# define EV_USE_INOTIFY 1
220# else
221# define EV_USE_INOTIFY 0
222# endif
223#endif
224
225#ifndef EV_PID_HASHSIZE
226# if EV_MINIMAL
227# define EV_PID_HASHSIZE 1
228# else
229# define EV_PID_HASHSIZE 16
230# endif
231#endif
232
233#ifndef EV_INOTIFY_HASHSIZE
234# if EV_MINIMAL
235# define EV_INOTIFY_HASHSIZE 1
236# else
237# define EV_INOTIFY_HASHSIZE 16
238# endif
239#endif
240
241#ifndef EV_USE_EVENTFD
242# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
243# define EV_USE_EVENTFD 1
244# else
245# define EV_USE_EVENTFD 0
246# endif
247#endif
248
249#if 0 /* debugging */
250# define EV_VERIFY 3
251# define EV_USE_4HEAP 1
252# define EV_HEAP_CACHE_AT 1
253#endif
254
255#ifndef EV_VERIFY
256# define EV_VERIFY !EV_MINIMAL
257#endif
258
259#ifndef EV_USE_4HEAP
260# define EV_USE_4HEAP !EV_MINIMAL
261#endif
262
263#ifndef EV_HEAP_CACHE_AT
264# define EV_HEAP_CACHE_AT !EV_MINIMAL
265#endif
266
267/* this block fixes any misconfiguration where we know we run into trouble otherwise */
268
269#ifndef CLOCK_MONOTONIC
270# undef EV_USE_MONOTONIC
271# define EV_USE_MONOTONIC 0
272#endif
273
274#ifndef CLOCK_REALTIME
275# undef EV_USE_REALTIME
276# define EV_USE_REALTIME 0
277#endif
278
279#if !EV_STAT_ENABLE
280# undef EV_USE_INOTIFY
281# define EV_USE_INOTIFY 0
282#endif
283
284#if !EV_USE_NANOSLEEP
285# ifndef _WIN32
286# include <sys/select.h>
287# endif
288#endif
289
290#if EV_USE_INOTIFY
291# include <sys/utsname.h>
292# include <sys/inotify.h>
293/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
294# ifndef IN_DONT_FOLLOW
295# undef EV_USE_INOTIFY
296# define EV_USE_INOTIFY 0
297# endif
298#endif
299
300#if EV_SELECT_IS_WINSOCKET
301# include <winsock.h>
302#endif
303
304#if EV_USE_EVENTFD
305/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
306# include <stdint.h>
307# ifdef __cplusplus
308extern "C" {
309# endif
310int eventfd (unsigned int initval, int flags);
311# ifdef __cplusplus
312}
313# endif
314#endif
315
316/**/
317
318#if EV_VERIFY >= 3
319# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
320#else
321# define EV_FREQUENT_CHECK do { } while (0)
322#endif
323
324/*
325 * This is used to avoid floating point rounding problems.
326 * It is added to ev_rt_now when scheduling periodics
327 * to ensure progress, time-wise, even when rounding
328 * errors are against us.
329 * This value is good at least till the year 4000.
330 * Better solutions welcome.
331 */
332#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
63 333
64#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 334#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65#define MAX_BLOCKTIME 60. 335#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
336/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
66 337
67#include "ev.h" 338#if __GNUC__ >= 4
339# define expect(expr,value) __builtin_expect ((expr),(value))
340# define noinline __attribute__ ((noinline))
341#else
342# define expect(expr,value) (expr)
343# define noinline
344# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
345# define inline
346# endif
347#endif
68 348
349#define expect_false(expr) expect ((expr) != 0, 0)
350#define expect_true(expr) expect ((expr) != 0, 1)
351#define inline_size static inline
352
353#if EV_MINIMAL
354# define inline_speed static noinline
355#else
356# define inline_speed static inline
357#endif
358
359#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
360#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
361
362#define EMPTY /* required for microsofts broken pseudo-c compiler */
363#define EMPTY2(a,b) /* used to suppress some warnings */
364
69typedef struct ev_watcher *W; 365typedef ev_watcher *W;
70typedef struct ev_watcher_list *WL; 366typedef ev_watcher_list *WL;
71typedef struct ev_watcher_time *WT; 367typedef ev_watcher_time *WT;
72 368
73static ev_tstamp now, diff; /* monotonic clock */ 369#define ev_active(w) ((W)(w))->active
370#define ev_at(w) ((WT)(w))->at
371
372#if EV_USE_MONOTONIC
373/* sig_atomic_t is used to avoid per-thread variables or locking but still */
374/* giving it a reasonably high chance of working on typical architetcures */
375static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
376#endif
377
378#ifdef _WIN32
379# include "ev_win32.c"
380#endif
381
382/*****************************************************************************/
383
384static void (*syserr_cb)(const char *msg);
385
386void
387ev_set_syserr_cb (void (*cb)(const char *msg))
388{
389 syserr_cb = cb;
390}
391
392static void noinline
393syserr (const char *msg)
394{
395 if (!msg)
396 msg = "(libev) system error";
397
398 if (syserr_cb)
399 syserr_cb (msg);
400 else
401 {
402 perror (msg);
403 abort ();
404 }
405}
406
407static void *
408ev_realloc_emul (void *ptr, long size)
409{
410 /* some systems, notably openbsd and darwin, fail to properly
411 * implement realloc (x, 0) (as required by both ansi c-98 and
412 * the single unix specification, so work around them here.
413 */
414
415 if (size)
416 return realloc (ptr, size);
417
418 free (ptr);
419 return 0;
420}
421
422static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
423
424void
425ev_set_allocator (void *(*cb)(void *ptr, long size))
426{
427 alloc = cb;
428}
429
430inline_speed void *
431ev_realloc (void *ptr, long size)
432{
433 ptr = alloc (ptr, size);
434
435 if (!ptr && size)
436 {
437 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
438 abort ();
439 }
440
441 return ptr;
442}
443
444#define ev_malloc(size) ev_realloc (0, (size))
445#define ev_free(ptr) ev_realloc ((ptr), 0)
446
447/*****************************************************************************/
448
449typedef struct
450{
451 WL head;
452 unsigned char events;
453 unsigned char reify;
454 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
455 unsigned char egen; /* generation counter to counter epoll bugs */
456#if EV_SELECT_IS_WINSOCKET
457 SOCKET handle;
458#endif
459} ANFD;
460
461typedef struct
462{
463 W w;
464 int events;
465} ANPENDING;
466
467#if EV_USE_INOTIFY
468/* hash table entry per inotify-id */
469typedef struct
470{
471 WL head;
472} ANFS;
473#endif
474
475/* Heap Entry */
476#if EV_HEAP_CACHE_AT
477 typedef struct {
478 ev_tstamp at;
479 WT w;
480 } ANHE;
481
482 #define ANHE_w(he) (he).w /* access watcher, read-write */
483 #define ANHE_at(he) (he).at /* access cached at, read-only */
484 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
485#else
486 typedef WT ANHE;
487
488 #define ANHE_w(he) (he)
489 #define ANHE_at(he) (he)->at
490 #define ANHE_at_cache(he)
491#endif
492
493#if EV_MULTIPLICITY
494
495 struct ev_loop
496 {
497 ev_tstamp ev_rt_now;
498 #define ev_rt_now ((loop)->ev_rt_now)
499 #define VAR(name,decl) decl;
500 #include "ev_vars.h"
501 #undef VAR
502 };
503 #include "ev_wrap.h"
504
505 static struct ev_loop default_loop_struct;
506 struct ev_loop *ev_default_loop_ptr;
507
508#else
509
74ev_tstamp ev_now; 510 ev_tstamp ev_rt_now;
75int ev_method; 511 #define VAR(name,decl) static decl;
512 #include "ev_vars.h"
513 #undef VAR
76 514
77static int have_monotonic; /* runtime */ 515 static int ev_default_loop_ptr;
78 516
79static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 517#endif
80static void (*method_modify)(int fd, int oev, int nev);
81static void (*method_poll)(ev_tstamp timeout);
82 518
83/*****************************************************************************/ 519/*****************************************************************************/
84 520
85ev_tstamp 521ev_tstamp
86ev_time (void) 522ev_time (void)
87{ 523{
88#if HAVE_REALTIME 524#if EV_USE_REALTIME
89 struct timespec ts; 525 struct timespec ts;
90 clock_gettime (CLOCK_REALTIME, &ts); 526 clock_gettime (CLOCK_REALTIME, &ts);
91 return ts.tv_sec + ts.tv_nsec * 1e-9; 527 return ts.tv_sec + ts.tv_nsec * 1e-9;
92#else 528#else
93 struct timeval tv; 529 struct timeval tv;
94 gettimeofday (&tv, 0); 530 gettimeofday (&tv, 0);
95 return tv.tv_sec + tv.tv_usec * 1e-6; 531 return tv.tv_sec + tv.tv_usec * 1e-6;
96#endif 532#endif
97} 533}
98 534
99static ev_tstamp 535ev_tstamp inline_size
100get_clock (void) 536get_clock (void)
101{ 537{
102#if HAVE_MONOTONIC 538#if EV_USE_MONOTONIC
103 if (have_monotonic) 539 if (expect_true (have_monotonic))
104 { 540 {
105 struct timespec ts; 541 struct timespec ts;
106 clock_gettime (CLOCK_MONOTONIC, &ts); 542 clock_gettime (CLOCK_MONOTONIC, &ts);
107 return ts.tv_sec + ts.tv_nsec * 1e-9; 543 return ts.tv_sec + ts.tv_nsec * 1e-9;
108 } 544 }
109#endif 545#endif
110 546
111 return ev_time (); 547 return ev_time ();
112} 548}
113 549
114#define array_needsize(base,cur,cnt,init) \ 550#if EV_MULTIPLICITY
115 if ((cnt) > cur) \ 551ev_tstamp
116 { \ 552ev_now (EV_P)
117 int newcnt = cur ? cur << 1 : 16; \ 553{
118 base = realloc (base, sizeof (*base) * (newcnt)); \ 554 return ev_rt_now;
119 init (base + cur, newcnt - cur); \ 555}
120 cur = newcnt; \ 556#endif
557
558void
559ev_sleep (ev_tstamp delay)
560{
561 if (delay > 0.)
121 } 562 {
563#if EV_USE_NANOSLEEP
564 struct timespec ts;
565
566 ts.tv_sec = (time_t)delay;
567 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
568
569 nanosleep (&ts, 0);
570#elif defined(_WIN32)
571 Sleep ((unsigned long)(delay * 1e3));
572#else
573 struct timeval tv;
574
575 tv.tv_sec = (time_t)delay;
576 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
577
578 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
579 /* somehting nto guaranteed by newer posix versions, but guaranteed */
580 /* by older ones */
581 select (0, 0, 0, 0, &tv);
582#endif
583 }
584}
122 585
123/*****************************************************************************/ 586/*****************************************************************************/
124 587
588#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
589
590int inline_size
591array_nextsize (int elem, int cur, int cnt)
592{
593 int ncur = cur + 1;
594
595 do
596 ncur <<= 1;
597 while (cnt > ncur);
598
599 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
600 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
601 {
602 ncur *= elem;
603 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
604 ncur = ncur - sizeof (void *) * 4;
605 ncur /= elem;
606 }
607
608 return ncur;
609}
610
611static noinline void *
612array_realloc (int elem, void *base, int *cur, int cnt)
613{
614 *cur = array_nextsize (elem, *cur, cnt);
615 return ev_realloc (base, elem * *cur);
616}
617
618#define array_init_zero(base,count) \
619 memset ((void *)(base), 0, sizeof (*(base)) * (count))
620
621#define array_needsize(type,base,cur,cnt,init) \
622 if (expect_false ((cnt) > (cur))) \
623 { \
624 int ocur_ = (cur); \
625 (base) = (type *)array_realloc \
626 (sizeof (type), (base), &(cur), (cnt)); \
627 init ((base) + (ocur_), (cur) - ocur_); \
628 }
629
630#if 0
631#define array_slim(type,stem) \
632 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
633 { \
634 stem ## max = array_roundsize (stem ## cnt >> 1); \
635 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
636 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
637 }
638#endif
639
640#define array_free(stem, idx) \
641 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
642
643/*****************************************************************************/
644
645void noinline
646ev_feed_event (EV_P_ void *w, int revents)
647{
648 W w_ = (W)w;
649 int pri = ABSPRI (w_);
650
651 if (expect_false (w_->pending))
652 pendings [pri][w_->pending - 1].events |= revents;
653 else
654 {
655 w_->pending = ++pendingcnt [pri];
656 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
657 pendings [pri][w_->pending - 1].w = w_;
658 pendings [pri][w_->pending - 1].events = revents;
659 }
660}
661
662void inline_speed
663queue_events (EV_P_ W *events, int eventcnt, int type)
664{
665 int i;
666
667 for (i = 0; i < eventcnt; ++i)
668 ev_feed_event (EV_A_ events [i], type);
669}
670
671/*****************************************************************************/
672
673void inline_speed
674fd_event (EV_P_ int fd, int revents)
675{
676 ANFD *anfd = anfds + fd;
677 ev_io *w;
678
679 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
680 {
681 int ev = w->events & revents;
682
683 if (ev)
684 ev_feed_event (EV_A_ (W)w, ev);
685 }
686}
687
688void
689ev_feed_fd_event (EV_P_ int fd, int revents)
690{
691 if (fd >= 0 && fd < anfdmax)
692 fd_event (EV_A_ fd, revents);
693}
694
695void inline_size
696fd_reify (EV_P)
697{
698 int i;
699
700 for (i = 0; i < fdchangecnt; ++i)
701 {
702 int fd = fdchanges [i];
703 ANFD *anfd = anfds + fd;
704 ev_io *w;
705
706 unsigned char events = 0;
707
708 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
709 events |= (unsigned char)w->events;
710
711#if EV_SELECT_IS_WINSOCKET
712 if (events)
713 {
714 unsigned long arg;
715 #ifdef EV_FD_TO_WIN32_HANDLE
716 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
717 #else
718 anfd->handle = _get_osfhandle (fd);
719 #endif
720 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
721 }
722#endif
723
724 {
725 unsigned char o_events = anfd->events;
726 unsigned char o_reify = anfd->reify;
727
728 anfd->reify = 0;
729 anfd->events = events;
730
731 if (o_events != events || o_reify & EV_IOFDSET)
732 backend_modify (EV_A_ fd, o_events, events);
733 }
734 }
735
736 fdchangecnt = 0;
737}
738
739void inline_size
740fd_change (EV_P_ int fd, int flags)
741{
742 unsigned char reify = anfds [fd].reify;
743 anfds [fd].reify |= flags;
744
745 if (expect_true (!reify))
746 {
747 ++fdchangecnt;
748 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
749 fdchanges [fdchangecnt - 1] = fd;
750 }
751}
752
753void inline_speed
754fd_kill (EV_P_ int fd)
755{
756 ev_io *w;
757
758 while ((w = (ev_io *)anfds [fd].head))
759 {
760 ev_io_stop (EV_A_ w);
761 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
762 }
763}
764
765int inline_size
766fd_valid (int fd)
767{
768#ifdef _WIN32
769 return _get_osfhandle (fd) != -1;
770#else
771 return fcntl (fd, F_GETFD) != -1;
772#endif
773}
774
775/* called on EBADF to verify fds */
776static void noinline
777fd_ebadf (EV_P)
778{
779 int fd;
780
781 for (fd = 0; fd < anfdmax; ++fd)
782 if (anfds [fd].events)
783 if (!fd_valid (fd) && errno == EBADF)
784 fd_kill (EV_A_ fd);
785}
786
787/* called on ENOMEM in select/poll to kill some fds and retry */
788static void noinline
789fd_enomem (EV_P)
790{
791 int fd;
792
793 for (fd = anfdmax; fd--; )
794 if (anfds [fd].events)
795 {
796 fd_kill (EV_A_ fd);
797 return;
798 }
799}
800
801/* usually called after fork if backend needs to re-arm all fds from scratch */
802static void noinline
803fd_rearm_all (EV_P)
804{
805 int fd;
806
807 for (fd = 0; fd < anfdmax; ++fd)
808 if (anfds [fd].events)
809 {
810 anfds [fd].events = 0;
811 fd_change (EV_A_ fd, EV_IOFDSET | 1);
812 }
813}
814
815/*****************************************************************************/
816
817/*
818 * the heap functions want a real array index. array index 0 uis guaranteed to not
819 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
820 * the branching factor of the d-tree.
821 */
822
823/*
824 * at the moment we allow libev the luxury of two heaps,
825 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
826 * which is more cache-efficient.
827 * the difference is about 5% with 50000+ watchers.
828 */
829#if EV_USE_4HEAP
830
831#define DHEAP 4
832#define HEAP0 (DHEAP - 1) /* index of first element in heap */
833#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
834#define UPHEAP_DONE(p,k) ((p) == (k))
835
836/* away from the root */
837void inline_speed
838downheap (ANHE *heap, int N, int k)
839{
840 ANHE he = heap [k];
841 ANHE *E = heap + N + HEAP0;
842
843 for (;;)
844 {
845 ev_tstamp minat;
846 ANHE *minpos;
847 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
848
849 /* find minimum child */
850 if (expect_true (pos + DHEAP - 1 < E))
851 {
852 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
853 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
854 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
855 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
856 }
857 else if (pos < E)
858 {
859 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
860 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
861 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
862 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
863 }
864 else
865 break;
866
867 if (ANHE_at (he) <= minat)
868 break;
869
870 heap [k] = *minpos;
871 ev_active (ANHE_w (*minpos)) = k;
872
873 k = minpos - heap;
874 }
875
876 heap [k] = he;
877 ev_active (ANHE_w (he)) = k;
878}
879
880#else /* 4HEAP */
881
882#define HEAP0 1
883#define HPARENT(k) ((k) >> 1)
884#define UPHEAP_DONE(p,k) (!(p))
885
886/* away from the root */
887void inline_speed
888downheap (ANHE *heap, int N, int k)
889{
890 ANHE he = heap [k];
891
892 for (;;)
893 {
894 int c = k << 1;
895
896 if (c > N + HEAP0 - 1)
897 break;
898
899 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
900 ? 1 : 0;
901
902 if (ANHE_at (he) <= ANHE_at (heap [c]))
903 break;
904
905 heap [k] = heap [c];
906 ev_active (ANHE_w (heap [k])) = k;
907
908 k = c;
909 }
910
911 heap [k] = he;
912 ev_active (ANHE_w (he)) = k;
913}
914#endif
915
916/* towards the root */
917void inline_speed
918upheap (ANHE *heap, int k)
919{
920 ANHE he = heap [k];
921
922 for (;;)
923 {
924 int p = HPARENT (k);
925
926 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
927 break;
928
929 heap [k] = heap [p];
930 ev_active (ANHE_w (heap [k])) = k;
931 k = p;
932 }
933
934 heap [k] = he;
935 ev_active (ANHE_w (he)) = k;
936}
937
938void inline_size
939adjustheap (ANHE *heap, int N, int k)
940{
941 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
942 upheap (heap, k);
943 else
944 downheap (heap, N, k);
945}
946
947/* rebuild the heap: this function is used only once and executed rarely */
948void inline_size
949reheap (ANHE *heap, int N)
950{
951 int i;
952
953 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
954 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
955 for (i = 0; i < N; ++i)
956 upheap (heap, i + HEAP0);
957}
958
959/*****************************************************************************/
960
125typedef struct 961typedef struct
126{ 962{
127 struct ev_io *head; 963 WL head;
128 unsigned char wev, rev; /* want, received event set */ 964 EV_ATOMIC_T gotsig;
129} ANFD;
130
131static ANFD *anfds;
132static int anfdmax;
133
134static int *fdchanges;
135static int fdchangemax, fdchangecnt;
136
137static void
138anfds_init (ANFD *base, int count)
139{
140 while (count--)
141 {
142 base->head = 0;
143 base->wev = base->rev = EV_NONE;
144 ++base;
145 }
146}
147
148typedef struct
149{
150 W w;
151 int events;
152} ANPENDING;
153
154static ANPENDING *pendings;
155static int pendingmax, pendingcnt;
156
157static void
158event (W w, int events)
159{
160 if (w->active)
161 {
162 w->pending = ++pendingcnt;
163 array_needsize (pendings, pendingmax, pendingcnt, );
164 pendings [pendingcnt - 1].w = w;
165 pendings [pendingcnt - 1].events = events;
166 }
167}
168
169static void
170fd_event (int fd, int events)
171{
172 ANFD *anfd = anfds + fd;
173 struct ev_io *w;
174
175 for (w = anfd->head; w; w = w->next)
176 {
177 int ev = w->events & events;
178
179 if (ev)
180 event ((W)w, ev);
181 }
182}
183
184static void
185queue_events (W *events, int eventcnt, int type)
186{
187 int i;
188
189 for (i = 0; i < eventcnt; ++i)
190 event (events [i], type);
191}
192
193/*****************************************************************************/
194
195static struct ev_timer **timers;
196static int timermax, timercnt;
197
198static struct ev_periodic **periodics;
199static int periodicmax, periodiccnt;
200
201static void
202upheap (WT *timers, int k)
203{
204 WT w = timers [k];
205
206 while (k && timers [k >> 1]->at > w->at)
207 {
208 timers [k] = timers [k >> 1];
209 timers [k]->active = k + 1;
210 k >>= 1;
211 }
212
213 timers [k] = w;
214 timers [k]->active = k + 1;
215
216}
217
218static void
219downheap (WT *timers, int N, int k)
220{
221 WT w = timers [k];
222
223 while (k < (N >> 1))
224 {
225 int j = k << 1;
226
227 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
228 ++j;
229
230 if (w->at <= timers [j]->at)
231 break;
232
233 timers [k] = timers [j];
234 timers [k]->active = k + 1;
235 k = j;
236 }
237
238 timers [k] = w;
239 timers [k]->active = k + 1;
240}
241
242/*****************************************************************************/
243
244typedef struct
245{
246 struct ev_signal *head;
247 sig_atomic_t gotsig;
248} ANSIG; 965} ANSIG;
249 966
250static ANSIG *signals; 967static ANSIG *signals;
251static int signalmax; 968static int signalmax;
252 969
253static int sigpipe [2]; 970static EV_ATOMIC_T gotsig;
254static sig_atomic_t gotsig; 971
255static struct ev_io sigev; 972/*****************************************************************************/
973
974void inline_speed
975fd_intern (int fd)
976{
977#ifdef _WIN32
978 unsigned long arg = 1;
979 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
980#else
981 fcntl (fd, F_SETFD, FD_CLOEXEC);
982 fcntl (fd, F_SETFL, O_NONBLOCK);
983#endif
984}
985
986static void noinline
987evpipe_init (EV_P)
988{
989 if (!ev_is_active (&pipeev))
990 {
991#if EV_USE_EVENTFD
992 if ((evfd = eventfd (0, 0)) >= 0)
993 {
994 evpipe [0] = -1;
995 fd_intern (evfd);
996 ev_io_set (&pipeev, evfd, EV_READ);
997 }
998 else
999#endif
1000 {
1001 while (pipe (evpipe))
1002 syserr ("(libev) error creating signal/async pipe");
1003
1004 fd_intern (evpipe [0]);
1005 fd_intern (evpipe [1]);
1006 ev_io_set (&pipeev, evpipe [0], EV_READ);
1007 }
1008
1009 ev_io_start (EV_A_ &pipeev);
1010 ev_unref (EV_A); /* watcher should not keep loop alive */
1011 }
1012}
1013
1014void inline_size
1015evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1016{
1017 if (!*flag)
1018 {
1019 int old_errno = errno; /* save errno because write might clobber it */
1020
1021 *flag = 1;
1022
1023#if EV_USE_EVENTFD
1024 if (evfd >= 0)
1025 {
1026 uint64_t counter = 1;
1027 write (evfd, &counter, sizeof (uint64_t));
1028 }
1029 else
1030#endif
1031 write (evpipe [1], &old_errno, 1);
1032
1033 errno = old_errno;
1034 }
1035}
256 1036
257static void 1037static void
258signals_init (ANSIG *base, int count) 1038pipecb (EV_P_ ev_io *iow, int revents)
259{ 1039{
260 while (count--) 1040#if EV_USE_EVENTFD
1041 if (evfd >= 0)
1042 {
1043 uint64_t counter;
1044 read (evfd, &counter, sizeof (uint64_t));
261 { 1045 }
262 base->head = 0; 1046 else
1047#endif
1048 {
1049 char dummy;
1050 read (evpipe [0], &dummy, 1);
1051 }
1052
1053 if (gotsig && ev_is_default_loop (EV_A))
1054 {
1055 int signum;
263 base->gotsig = 0; 1056 gotsig = 0;
264 ++base; 1057
1058 for (signum = signalmax; signum--; )
1059 if (signals [signum].gotsig)
1060 ev_feed_signal_event (EV_A_ signum + 1);
1061 }
1062
1063#if EV_ASYNC_ENABLE
1064 if (gotasync)
265 } 1065 {
1066 int i;
1067 gotasync = 0;
1068
1069 for (i = asynccnt; i--; )
1070 if (asyncs [i]->sent)
1071 {
1072 asyncs [i]->sent = 0;
1073 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1074 }
1075 }
1076#endif
266} 1077}
1078
1079/*****************************************************************************/
267 1080
268static void 1081static void
269sighandler (int signum) 1082ev_sighandler (int signum)
270{ 1083{
1084#if EV_MULTIPLICITY
1085 struct ev_loop *loop = &default_loop_struct;
1086#endif
1087
1088#if _WIN32
1089 signal (signum, ev_sighandler);
1090#endif
1091
271 signals [signum - 1].gotsig = 1; 1092 signals [signum - 1].gotsig = 1;
1093 evpipe_write (EV_A_ &gotsig);
1094}
272 1095
273 if (!gotsig) 1096void noinline
1097ev_feed_signal_event (EV_P_ int signum)
1098{
1099 WL w;
1100
1101#if EV_MULTIPLICITY
1102 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1103#endif
1104
1105 --signum;
1106
1107 if (signum < 0 || signum >= signalmax)
1108 return;
1109
1110 signals [signum].gotsig = 0;
1111
1112 for (w = signals [signum].head; w; w = w->next)
1113 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1114}
1115
1116/*****************************************************************************/
1117
1118static WL childs [EV_PID_HASHSIZE];
1119
1120#ifndef _WIN32
1121
1122static ev_signal childev;
1123
1124#ifndef WIFCONTINUED
1125# define WIFCONTINUED(status) 0
1126#endif
1127
1128void inline_speed
1129child_reap (EV_P_ int chain, int pid, int status)
1130{
1131 ev_child *w;
1132 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1133
1134 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1135 {
1136 if ((w->pid == pid || !w->pid)
1137 && (!traced || (w->flags & 1)))
1138 {
1139 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1140 w->rpid = pid;
1141 w->rstatus = status;
1142 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1143 }
1144 }
1145}
1146
1147#ifndef WCONTINUED
1148# define WCONTINUED 0
1149#endif
1150
1151static void
1152childcb (EV_P_ ev_signal *sw, int revents)
1153{
1154 int pid, status;
1155
1156 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1157 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1158 if (!WCONTINUED
1159 || errno != EINVAL
1160 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1161 return;
1162
1163 /* make sure we are called again until all children have been reaped */
1164 /* we need to do it this way so that the callback gets called before we continue */
1165 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1166
1167 child_reap (EV_A_ pid, pid, status);
1168 if (EV_PID_HASHSIZE > 1)
1169 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1170}
1171
1172#endif
1173
1174/*****************************************************************************/
1175
1176#if EV_USE_PORT
1177# include "ev_port.c"
1178#endif
1179#if EV_USE_KQUEUE
1180# include "ev_kqueue.c"
1181#endif
1182#if EV_USE_EPOLL
1183# include "ev_epoll.c"
1184#endif
1185#if EV_USE_POLL
1186# include "ev_poll.c"
1187#endif
1188#if EV_USE_SELECT
1189# include "ev_select.c"
1190#endif
1191
1192int
1193ev_version_major (void)
1194{
1195 return EV_VERSION_MAJOR;
1196}
1197
1198int
1199ev_version_minor (void)
1200{
1201 return EV_VERSION_MINOR;
1202}
1203
1204/* return true if we are running with elevated privileges and should ignore env variables */
1205int inline_size
1206enable_secure (void)
1207{
1208#ifdef _WIN32
1209 return 0;
1210#else
1211 return getuid () != geteuid ()
1212 || getgid () != getegid ();
1213#endif
1214}
1215
1216unsigned int
1217ev_supported_backends (void)
1218{
1219 unsigned int flags = 0;
1220
1221 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1222 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1223 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1224 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1225 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1226
1227 return flags;
1228}
1229
1230unsigned int
1231ev_recommended_backends (void)
1232{
1233 unsigned int flags = ev_supported_backends ();
1234
1235#ifndef __NetBSD__
1236 /* kqueue is borked on everything but netbsd apparently */
1237 /* it usually doesn't work correctly on anything but sockets and pipes */
1238 flags &= ~EVBACKEND_KQUEUE;
1239#endif
1240#ifdef __APPLE__
1241 // flags &= ~EVBACKEND_KQUEUE; for documentation
1242 flags &= ~EVBACKEND_POLL;
1243#endif
1244
1245 return flags;
1246}
1247
1248unsigned int
1249ev_embeddable_backends (void)
1250{
1251 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1252
1253 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1254 /* please fix it and tell me how to detect the fix */
1255 flags &= ~EVBACKEND_EPOLL;
1256
1257 return flags;
1258}
1259
1260unsigned int
1261ev_backend (EV_P)
1262{
1263 return backend;
1264}
1265
1266unsigned int
1267ev_loop_count (EV_P)
1268{
1269 return loop_count;
1270}
1271
1272void
1273ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1274{
1275 io_blocktime = interval;
1276}
1277
1278void
1279ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1280{
1281 timeout_blocktime = interval;
1282}
1283
1284static void noinline
1285loop_init (EV_P_ unsigned int flags)
1286{
1287 if (!backend)
1288 {
1289#if EV_USE_MONOTONIC
274 { 1290 {
1291 struct timespec ts;
1292 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1293 have_monotonic = 1;
1294 }
1295#endif
1296
1297 ev_rt_now = ev_time ();
1298 mn_now = get_clock ();
1299 now_floor = mn_now;
1300 rtmn_diff = ev_rt_now - mn_now;
1301
1302 io_blocktime = 0.;
1303 timeout_blocktime = 0.;
1304 backend = 0;
1305 backend_fd = -1;
1306 gotasync = 0;
1307#if EV_USE_INOTIFY
1308 fs_fd = -2;
1309#endif
1310
1311 /* pid check not overridable via env */
1312#ifndef _WIN32
1313 if (flags & EVFLAG_FORKCHECK)
1314 curpid = getpid ();
1315#endif
1316
1317 if (!(flags & EVFLAG_NOENV)
1318 && !enable_secure ()
1319 && getenv ("LIBEV_FLAGS"))
1320 flags = atoi (getenv ("LIBEV_FLAGS"));
1321
1322 if (!(flags & 0x0000ffffU))
1323 flags |= ev_recommended_backends ();
1324
1325#if EV_USE_PORT
1326 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1327#endif
1328#if EV_USE_KQUEUE
1329 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1330#endif
1331#if EV_USE_EPOLL
1332 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1333#endif
1334#if EV_USE_POLL
1335 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1336#endif
1337#if EV_USE_SELECT
1338 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1339#endif
1340
1341 ev_init (&pipeev, pipecb);
1342 ev_set_priority (&pipeev, EV_MAXPRI);
1343 }
1344}
1345
1346static void noinline
1347loop_destroy (EV_P)
1348{
1349 int i;
1350
1351 if (ev_is_active (&pipeev))
1352 {
1353 ev_ref (EV_A); /* signal watcher */
1354 ev_io_stop (EV_A_ &pipeev);
1355
1356#if EV_USE_EVENTFD
1357 if (evfd >= 0)
1358 close (evfd);
1359#endif
1360
1361 if (evpipe [0] >= 0)
1362 {
1363 close (evpipe [0]);
1364 close (evpipe [1]);
1365 }
1366 }
1367
1368#if EV_USE_INOTIFY
1369 if (fs_fd >= 0)
1370 close (fs_fd);
1371#endif
1372
1373 if (backend_fd >= 0)
1374 close (backend_fd);
1375
1376#if EV_USE_PORT
1377 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1378#endif
1379#if EV_USE_KQUEUE
1380 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1381#endif
1382#if EV_USE_EPOLL
1383 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1384#endif
1385#if EV_USE_POLL
1386 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1387#endif
1388#if EV_USE_SELECT
1389 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1390#endif
1391
1392 for (i = NUMPRI; i--; )
1393 {
1394 array_free (pending, [i]);
1395#if EV_IDLE_ENABLE
1396 array_free (idle, [i]);
1397#endif
1398 }
1399
1400 ev_free (anfds); anfdmax = 0;
1401
1402 /* have to use the microsoft-never-gets-it-right macro */
1403 array_free (fdchange, EMPTY);
1404 array_free (timer, EMPTY);
1405#if EV_PERIODIC_ENABLE
1406 array_free (periodic, EMPTY);
1407#endif
1408#if EV_FORK_ENABLE
1409 array_free (fork, EMPTY);
1410#endif
1411 array_free (prepare, EMPTY);
1412 array_free (check, EMPTY);
1413#if EV_ASYNC_ENABLE
1414 array_free (async, EMPTY);
1415#endif
1416
1417 backend = 0;
1418}
1419
1420#if EV_USE_INOTIFY
1421void inline_size infy_fork (EV_P);
1422#endif
1423
1424void inline_size
1425loop_fork (EV_P)
1426{
1427#if EV_USE_PORT
1428 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1429#endif
1430#if EV_USE_KQUEUE
1431 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1432#endif
1433#if EV_USE_EPOLL
1434 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1435#endif
1436#if EV_USE_INOTIFY
1437 infy_fork (EV_A);
1438#endif
1439
1440 if (ev_is_active (&pipeev))
1441 {
1442 /* this "locks" the handlers against writing to the pipe */
1443 /* while we modify the fd vars */
275 gotsig = 1; 1444 gotsig = 1;
276 write (sigpipe [1], &gotsig, 1); 1445#if EV_ASYNC_ENABLE
277 } 1446 gotasync = 1;
278} 1447#endif
279 1448
280static void 1449 ev_ref (EV_A);
281sigcb (struct ev_io *iow, int revents) 1450 ev_io_stop (EV_A_ &pipeev);
1451
1452#if EV_USE_EVENTFD
1453 if (evfd >= 0)
1454 close (evfd);
1455#endif
1456
1457 if (evpipe [0] >= 0)
1458 {
1459 close (evpipe [0]);
1460 close (evpipe [1]);
1461 }
1462
1463 evpipe_init (EV_A);
1464 /* now iterate over everything, in case we missed something */
1465 pipecb (EV_A_ &pipeev, EV_READ);
1466 }
1467
1468 postfork = 0;
1469}
1470
1471#if EV_MULTIPLICITY
1472
1473struct ev_loop *
1474ev_loop_new (unsigned int flags)
282{ 1475{
283 struct ev_signal *w; 1476 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1477
1478 memset (loop, 0, sizeof (struct ev_loop));
1479
1480 loop_init (EV_A_ flags);
1481
1482 if (ev_backend (EV_A))
1483 return loop;
1484
1485 return 0;
1486}
1487
1488void
1489ev_loop_destroy (EV_P)
1490{
1491 loop_destroy (EV_A);
1492 ev_free (loop);
1493}
1494
1495void
1496ev_loop_fork (EV_P)
1497{
1498 postfork = 1; /* must be in line with ev_default_fork */
1499}
1500
1501#if EV_VERIFY
1502static void noinline
1503verify_watcher (EV_P_ W w)
1504{
1505 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1506
1507 if (w->pending)
1508 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1509}
1510
1511static void noinline
1512verify_heap (EV_P_ ANHE *heap, int N)
1513{
284 int sig; 1514 int i;
285 1515
286 gotsig = 0; 1516 for (i = HEAP0; i < N + HEAP0; ++i)
287 read (sigpipe [0], &revents, 1); 1517 {
1518 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1519 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1520 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
288 1521
289 for (sig = signalmax; sig--; ) 1522 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
290 if (signals [sig].gotsig) 1523 }
1524}
1525
1526static void noinline
1527array_verify (EV_P_ W *ws, int cnt)
1528{
1529 while (cnt--)
1530 {
1531 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1532 verify_watcher (EV_A_ ws [cnt]);
1533 }
1534}
1535#endif
1536
1537void
1538ev_loop_verify (EV_P)
1539{
1540#if EV_VERIFY
1541 int i;
1542 WL w;
1543
1544 assert (activecnt >= -1);
1545
1546 assert (fdchangemax >= fdchangecnt);
1547 for (i = 0; i < fdchangecnt; ++i)
1548 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1549
1550 assert (anfdmax >= 0);
1551 for (i = 0; i < anfdmax; ++i)
1552 for (w = anfds [i].head; w; w = w->next)
291 { 1553 {
292 signals [sig].gotsig = 0; 1554 verify_watcher (EV_A_ (W)w);
293 1555 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
294 for (w = signals [sig].head; w; w = w->next) 1556 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
295 event ((W)w, EV_SIGNAL);
296 } 1557 }
297}
298 1558
299static void 1559 assert (timermax >= timercnt);
300siginit (void) 1560 verify_heap (EV_A_ timers, timercnt);
301{
302 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
303 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
304 1561
305 /* rather than sort out wether we really need nb, set it */ 1562#if EV_PERIODIC_ENABLE
306 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); 1563 assert (periodicmax >= periodiccnt);
307 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK); 1564 verify_heap (EV_A_ periodics, periodiccnt);
1565#endif
308 1566
309 evio_set (&sigev, sigpipe [0], EV_READ); 1567 for (i = NUMPRI; i--; )
310 evio_start (&sigev); 1568 {
1569 assert (pendingmax [i] >= pendingcnt [i]);
1570#if EV_IDLE_ENABLE
1571 assert (idleall >= 0);
1572 assert (idlemax [i] >= idlecnt [i]);
1573 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1574#endif
1575 }
1576
1577#if EV_FORK_ENABLE
1578 assert (forkmax >= forkcnt);
1579 array_verify (EV_A_ (W *)forks, forkcnt);
1580#endif
1581
1582#if EV_ASYNC_ENABLE
1583 assert (asyncmax >= asynccnt);
1584 array_verify (EV_A_ (W *)asyncs, asynccnt);
1585#endif
1586
1587 assert (preparemax >= preparecnt);
1588 array_verify (EV_A_ (W *)prepares, preparecnt);
1589
1590 assert (checkmax >= checkcnt);
1591 array_verify (EV_A_ (W *)checks, checkcnt);
1592
1593# if 0
1594 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1595 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1596# endif
1597#endif
1598}
1599
1600#endif /* multiplicity */
1601
1602#if EV_MULTIPLICITY
1603struct ev_loop *
1604ev_default_loop_init (unsigned int flags)
1605#else
1606int
1607ev_default_loop (unsigned int flags)
1608#endif
1609{
1610 if (!ev_default_loop_ptr)
1611 {
1612#if EV_MULTIPLICITY
1613 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1614#else
1615 ev_default_loop_ptr = 1;
1616#endif
1617
1618 loop_init (EV_A_ flags);
1619
1620 if (ev_backend (EV_A))
1621 {
1622#ifndef _WIN32
1623 ev_signal_init (&childev, childcb, SIGCHLD);
1624 ev_set_priority (&childev, EV_MAXPRI);
1625 ev_signal_start (EV_A_ &childev);
1626 ev_unref (EV_A); /* child watcher should not keep loop alive */
1627#endif
1628 }
1629 else
1630 ev_default_loop_ptr = 0;
1631 }
1632
1633 return ev_default_loop_ptr;
1634}
1635
1636void
1637ev_default_destroy (void)
1638{
1639#if EV_MULTIPLICITY
1640 struct ev_loop *loop = ev_default_loop_ptr;
1641#endif
1642
1643 ev_default_loop_ptr = 0;
1644
1645#ifndef _WIN32
1646 ev_ref (EV_A); /* child watcher */
1647 ev_signal_stop (EV_A_ &childev);
1648#endif
1649
1650 loop_destroy (EV_A);
1651}
1652
1653void
1654ev_default_fork (void)
1655{
1656#if EV_MULTIPLICITY
1657 struct ev_loop *loop = ev_default_loop_ptr;
1658#endif
1659
1660 if (backend)
1661 postfork = 1; /* must be in line with ev_loop_fork */
311} 1662}
312 1663
313/*****************************************************************************/ 1664/*****************************************************************************/
314 1665
315static struct ev_idle **idles; 1666void
316static int idlemax, idlecnt; 1667ev_invoke (EV_P_ void *w, int revents)
317
318static struct ev_check **checks;
319static int checkmax, checkcnt;
320
321/*****************************************************************************/
322
323#if HAVE_EPOLL
324# include "ev_epoll.c"
325#endif
326#if HAVE_SELECT
327# include "ev_select.c"
328#endif
329
330int ev_init (int flags)
331{ 1668{
332#if HAVE_MONOTONIC 1669 EV_CB_INVOKE ((W)w, revents);
333 {
334 struct timespec ts;
335 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
336 have_monotonic = 1;
337 }
338#endif
339
340 ev_now = ev_time ();
341 now = get_clock ();
342 diff = ev_now - now;
343
344 if (pipe (sigpipe))
345 return 0;
346
347 ev_method = EVMETHOD_NONE;
348#if HAVE_EPOLL
349 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
350#endif
351#if HAVE_SELECT
352 if (ev_method == EVMETHOD_NONE) select_init (flags);
353#endif
354
355 if (ev_method)
356 {
357 evw_init (&sigev, sigcb);
358 siginit ();
359 }
360
361 return ev_method;
362} 1670}
363 1671
364/*****************************************************************************/ 1672void inline_speed
365 1673call_pending (EV_P)
366void ev_prefork (void)
367{ 1674{
368 /* nop */
369}
370
371void ev_postfork_parent (void)
372{
373 /* nop */
374}
375
376void ev_postfork_child (void)
377{
378#if HAVE_EPOLL
379 if (ev_method == EVMETHOD_EPOLL)
380 epoll_postfork_child ();
381#endif
382
383 evio_stop (&sigev);
384 close (sigpipe [0]);
385 close (sigpipe [1]);
386 pipe (sigpipe);
387 siginit ();
388}
389
390/*****************************************************************************/
391
392static void
393fd_reify (void)
394{
395 int i; 1675 int pri;
396 1676
397 for (i = 0; i < fdchangecnt; ++i) 1677 for (pri = NUMPRI; pri--; )
1678 while (pendingcnt [pri])
398 { 1679 {
399 int fd = fdchanges [i]; 1680 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
400 ANFD *anfd = anfds + fd;
401 struct ev_io *w;
402 1681
403 int wev = 0; 1682 if (expect_true (p->w))
1683 {
1684 /*assert (("non-pending watcher on pending list", p->w->pending));*/
404 1685
405 for (w = anfd->head; w; w = w->next) 1686 p->w->pending = 0;
406 wev |= w->events; 1687 EV_CB_INVOKE (p->w, p->events);
1688 EV_FREQUENT_CHECK;
1689 }
1690 }
1691}
407 1692
408 if (anfd->wev != wev) 1693#if EV_IDLE_ENABLE
1694void inline_size
1695idle_reify (EV_P)
1696{
1697 if (expect_false (idleall))
1698 {
1699 int pri;
1700
1701 for (pri = NUMPRI; pri--; )
409 { 1702 {
410 method_modify (fd, anfd->wev, wev); 1703 if (pendingcnt [pri])
411 anfd->wev = wev; 1704 break;
1705
1706 if (idlecnt [pri])
1707 {
1708 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1709 break;
1710 }
412 } 1711 }
413 } 1712 }
414
415 fdchangecnt = 0;
416} 1713}
1714#endif
417 1715
418static void 1716void inline_size
419call_pending ()
420{
421 while (pendingcnt)
422 {
423 ANPENDING *p = pendings + --pendingcnt;
424
425 if (p->w)
426 {
427 p->w->pending = 0;
428 p->w->cb (p->w, p->events);
429 }
430 }
431}
432
433static void
434timers_reify () 1717timers_reify (EV_P)
435{ 1718{
1719 EV_FREQUENT_CHECK;
1720
436 while (timercnt && timers [0]->at <= now) 1721 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
437 { 1722 {
438 struct ev_timer *w = timers [0]; 1723 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
439 1724
440 event ((W)w, EV_TIMEOUT); 1725 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
441 1726
442 /* first reschedule or stop timer */ 1727 /* first reschedule or stop timer */
443 if (w->repeat) 1728 if (w->repeat)
444 { 1729 {
445 w->at = now + w->repeat; 1730 ev_at (w) += w->repeat;
446 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1731 if (ev_at (w) < mn_now)
1732 ev_at (w) = mn_now;
1733
1734 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1735
1736 ANHE_at_cache (timers [HEAP0]);
447 downheap ((WT *)timers, timercnt, 0); 1737 downheap (timers, timercnt, HEAP0);
448 } 1738 }
449 else 1739 else
450 evtimer_stop (w); /* nonrepeating: stop timer */ 1740 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
451 }
452}
453 1741
454static void 1742 EV_FREQUENT_CHECK;
1743 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1744 }
1745}
1746
1747#if EV_PERIODIC_ENABLE
1748void inline_size
455periodics_reify () 1749periodics_reify (EV_P)
456{ 1750{
1751 EV_FREQUENT_CHECK;
1752
457 while (periodiccnt && periodics [0]->at <= ev_now) 1753 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
458 { 1754 {
459 struct ev_periodic *w = periodics [0]; 1755 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1756
1757 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
460 1758
461 /* first reschedule or stop timer */ 1759 /* first reschedule or stop timer */
462 if (w->interval) 1760 if (w->reschedule_cb)
463 { 1761 {
464 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1762 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
465 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1763
1764 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1765
1766 ANHE_at_cache (periodics [HEAP0]);
466 downheap ((WT *)periodics, periodiccnt, 0); 1767 downheap (periodics, periodiccnt, HEAP0);
1768 }
1769 else if (w->interval)
1770 {
1771 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1772 /* if next trigger time is not sufficiently in the future, put it there */
1773 /* this might happen because of floating point inexactness */
1774 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1775 {
1776 ev_at (w) += w->interval;
1777
1778 /* if interval is unreasonably low we might still have a time in the past */
1779 /* so correct this. this will make the periodic very inexact, but the user */
1780 /* has effectively asked to get triggered more often than possible */
1781 if (ev_at (w) < ev_rt_now)
1782 ev_at (w) = ev_rt_now;
1783 }
1784
1785 ANHE_at_cache (periodics [HEAP0]);
1786 downheap (periodics, periodiccnt, HEAP0);
467 } 1787 }
468 else 1788 else
469 evperiodic_stop (w); /* nonrepeating: stop timer */ 1789 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
470 1790
471 event ((W)w, EV_TIMEOUT); 1791 EV_FREQUENT_CHECK;
1792 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
472 } 1793 }
473} 1794}
474 1795
475static void 1796static void noinline
476periodics_reschedule (ev_tstamp diff) 1797periodics_reschedule (EV_P)
477{ 1798{
478 int i; 1799 int i;
479 1800
480 /* adjust periodics after time jump */ 1801 /* adjust periodics after time jump */
481 for (i = 0; i < periodiccnt; ++i) 1802 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
482 { 1803 {
483 struct ev_periodic *w = periodics [i]; 1804 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
484 1805
1806 if (w->reschedule_cb)
1807 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
485 if (w->interval) 1808 else if (w->interval)
1809 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1810
1811 ANHE_at_cache (periodics [i]);
1812 }
1813
1814 reheap (periodics, periodiccnt);
1815}
1816#endif
1817
1818void inline_speed
1819time_update (EV_P_ ev_tstamp max_block)
1820{
1821 int i;
1822
1823#if EV_USE_MONOTONIC
1824 if (expect_true (have_monotonic))
1825 {
1826 ev_tstamp odiff = rtmn_diff;
1827
1828 mn_now = get_clock ();
1829
1830 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1831 /* interpolate in the meantime */
1832 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
486 { 1833 {
487 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1834 ev_rt_now = rtmn_diff + mn_now;
1835 return;
1836 }
488 1837
489 if (fabs (diff) >= 1e-4) 1838 now_floor = mn_now;
1839 ev_rt_now = ev_time ();
1840
1841 /* loop a few times, before making important decisions.
1842 * on the choice of "4": one iteration isn't enough,
1843 * in case we get preempted during the calls to
1844 * ev_time and get_clock. a second call is almost guaranteed
1845 * to succeed in that case, though. and looping a few more times
1846 * doesn't hurt either as we only do this on time-jumps or
1847 * in the unlikely event of having been preempted here.
1848 */
1849 for (i = 4; --i; )
1850 {
1851 rtmn_diff = ev_rt_now - mn_now;
1852
1853 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1854 return; /* all is well */
1855
1856 ev_rt_now = ev_time ();
1857 mn_now = get_clock ();
1858 now_floor = mn_now;
1859 }
1860
1861# if EV_PERIODIC_ENABLE
1862 periodics_reschedule (EV_A);
1863# endif
1864 /* no timer adjustment, as the monotonic clock doesn't jump */
1865 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1866 }
1867 else
1868#endif
1869 {
1870 ev_rt_now = ev_time ();
1871
1872 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1873 {
1874#if EV_PERIODIC_ENABLE
1875 periodics_reschedule (EV_A);
1876#endif
1877 /* adjust timers. this is easy, as the offset is the same for all of them */
1878 for (i = 0; i < timercnt; ++i)
490 { 1879 {
491 evperiodic_stop (w); 1880 ANHE *he = timers + i + HEAP0;
492 evperiodic_start (w); 1881 ANHE_w (*he)->at += ev_rt_now - mn_now;
493 1882 ANHE_at_cache (*he);
494 i = 0; /* restart loop, inefficient, but time jumps should be rare */
495 } 1883 }
496 } 1884 }
497 }
498}
499 1885
500static void 1886 mn_now = ev_rt_now;
501time_update ()
502{
503 int i;
504
505 ev_now = ev_time ();
506
507 if (have_monotonic)
508 { 1887 }
509 ev_tstamp odiff = diff; 1888}
510 1889
511 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1890void
1891ev_ref (EV_P)
1892{
1893 ++activecnt;
1894}
1895
1896void
1897ev_unref (EV_P)
1898{
1899 --activecnt;
1900}
1901
1902void
1903ev_now_update (EV_P)
1904{
1905 time_update (EV_A_ 1e100);
1906}
1907
1908static int loop_done;
1909
1910void
1911ev_loop (EV_P_ int flags)
1912{
1913 loop_done = EVUNLOOP_CANCEL;
1914
1915 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1916
1917 do
1918 {
1919#if EV_VERIFY >= 2
1920 ev_loop_verify (EV_A);
1921#endif
1922
1923#ifndef _WIN32
1924 if (expect_false (curpid)) /* penalise the forking check even more */
1925 if (expect_false (getpid () != curpid))
1926 {
1927 curpid = getpid ();
1928 postfork = 1;
1929 }
1930#endif
1931
1932#if EV_FORK_ENABLE
1933 /* we might have forked, so queue fork handlers */
1934 if (expect_false (postfork))
1935 if (forkcnt)
1936 {
1937 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1938 call_pending (EV_A);
1939 }
1940#endif
1941
1942 /* queue prepare watchers (and execute them) */
1943 if (expect_false (preparecnt))
512 { 1944 {
513 now = get_clock (); 1945 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
514 diff = ev_now - now; 1946 call_pending (EV_A);
515
516 if (fabs (odiff - diff) < MIN_TIMEJUMP)
517 return; /* all is well */
518
519 ev_now = ev_time ();
520 } 1947 }
521 1948
522 periodics_reschedule (diff - odiff); 1949 if (expect_false (!activecnt))
523 /* no timer adjustment, as the monotonic clock doesn't jump */ 1950 break;
524 }
525 else
526 {
527 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
528 {
529 periodics_reschedule (ev_now - now);
530 1951
531 /* adjust timers. this is easy, as the offset is the same for all */ 1952 /* we might have forked, so reify kernel state if necessary */
532 for (i = 0; i < timercnt; ++i) 1953 if (expect_false (postfork))
533 timers [i]->at += diff; 1954 loop_fork (EV_A);
534 }
535 1955
536 now = ev_now;
537 }
538}
539
540int ev_loop_done;
541
542void ev_loop (int flags)
543{
544 double block;
545 ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
546
547 if (checkcnt)
548 {
549 queue_events ((W *)checks, checkcnt, EV_CHECK);
550 call_pending ();
551 }
552
553 do
554 {
555 /* update fd-related kernel structures */ 1956 /* update fd-related kernel structures */
556 fd_reify (); 1957 fd_reify (EV_A);
557 1958
558 /* calculate blocking time */ 1959 /* calculate blocking time */
1960 {
1961 ev_tstamp waittime = 0.;
1962 ev_tstamp sleeptime = 0.;
559 1963
560 /* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */ 1964 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
561 ev_now = ev_time ();
562
563 if (flags & EVLOOP_NONBLOCK || idlecnt)
564 block = 0.;
565 else
566 { 1965 {
1966 /* update time to cancel out callback processing overhead */
1967 time_update (EV_A_ 1e100);
1968
567 block = MAX_BLOCKTIME; 1969 waittime = MAX_BLOCKTIME;
568 1970
569 if (timercnt) 1971 if (timercnt)
570 { 1972 {
571 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 1973 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
572 if (block > to) block = to; 1974 if (waittime > to) waittime = to;
573 } 1975 }
574 1976
1977#if EV_PERIODIC_ENABLE
575 if (periodiccnt) 1978 if (periodiccnt)
576 { 1979 {
577 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1980 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
578 if (block > to) block = to; 1981 if (waittime > to) waittime = to;
579 } 1982 }
1983#endif
580 1984
581 if (block < 0.) block = 0.; 1985 if (expect_false (waittime < timeout_blocktime))
1986 waittime = timeout_blocktime;
1987
1988 sleeptime = waittime - backend_fudge;
1989
1990 if (expect_true (sleeptime > io_blocktime))
1991 sleeptime = io_blocktime;
1992
1993 if (sleeptime)
1994 {
1995 ev_sleep (sleeptime);
1996 waittime -= sleeptime;
1997 }
582 } 1998 }
583 1999
584 method_poll (block); 2000 ++loop_count;
2001 backend_poll (EV_A_ waittime);
585 2002
586 /* update ev_now, do magic */ 2003 /* update ev_rt_now, do magic */
587 time_update (); 2004 time_update (EV_A_ waittime + sleeptime);
2005 }
588 2006
589 /* queue pending timers and reschedule them */ 2007 /* queue pending timers and reschedule them */
2008 timers_reify (EV_A); /* relative timers called last */
2009#if EV_PERIODIC_ENABLE
590 periodics_reify (); /* absolute timers first */ 2010 periodics_reify (EV_A); /* absolute timers called first */
591 timers_reify (); /* relative timers second */ 2011#endif
592 2012
2013#if EV_IDLE_ENABLE
593 /* queue idle watchers unless io or timers are pending */ 2014 /* queue idle watchers unless other events are pending */
594 if (!pendingcnt) 2015 idle_reify (EV_A);
595 queue_events ((W *)idles, idlecnt, EV_IDLE); 2016#endif
596 2017
597 /* queue check and possibly idle watchers */ 2018 /* queue check watchers, to be executed first */
2019 if (expect_false (checkcnt))
598 queue_events ((W *)checks, checkcnt, EV_CHECK); 2020 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
599 2021
600 call_pending (); 2022 call_pending (EV_A);
601 } 2023 }
602 while (!ev_loop_done); 2024 while (expect_true (
2025 activecnt
2026 && !loop_done
2027 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2028 ));
603 2029
604 if (ev_loop_done != 2) 2030 if (loop_done == EVUNLOOP_ONE)
2031 loop_done = EVUNLOOP_CANCEL;
2032}
2033
2034void
2035ev_unloop (EV_P_ int how)
2036{
605 ev_loop_done = 0; 2037 loop_done = how;
606} 2038}
607 2039
608/*****************************************************************************/ 2040/*****************************************************************************/
609 2041
610static void 2042void inline_size
611wlist_add (WL *head, WL elem) 2043wlist_add (WL *head, WL elem)
612{ 2044{
613 elem->next = *head; 2045 elem->next = *head;
614 *head = elem; 2046 *head = elem;
615} 2047}
616 2048
617static void 2049void inline_size
618wlist_del (WL *head, WL elem) 2050wlist_del (WL *head, WL elem)
619{ 2051{
620 while (*head) 2052 while (*head)
621 { 2053 {
622 if (*head == elem) 2054 if (*head == elem)
… …
627 2059
628 head = &(*head)->next; 2060 head = &(*head)->next;
629 } 2061 }
630} 2062}
631 2063
632static void 2064void inline_speed
633ev_clear (W w) 2065clear_pending (EV_P_ W w)
634{ 2066{
635 if (w->pending) 2067 if (w->pending)
636 { 2068 {
637 pendings [w->pending - 1].w = 0; 2069 pendings [ABSPRI (w)][w->pending - 1].w = 0;
638 w->pending = 0; 2070 w->pending = 0;
639 } 2071 }
640} 2072}
641 2073
642static void 2074int
2075ev_clear_pending (EV_P_ void *w)
2076{
2077 W w_ = (W)w;
2078 int pending = w_->pending;
2079
2080 if (expect_true (pending))
2081 {
2082 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2083 w_->pending = 0;
2084 p->w = 0;
2085 return p->events;
2086 }
2087 else
2088 return 0;
2089}
2090
2091void inline_size
2092pri_adjust (EV_P_ W w)
2093{
2094 int pri = w->priority;
2095 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2096 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2097 w->priority = pri;
2098}
2099
2100void inline_speed
643ev_start (W w, int active) 2101ev_start (EV_P_ W w, int active)
644{ 2102{
2103 pri_adjust (EV_A_ w);
645 w->active = active; 2104 w->active = active;
2105 ev_ref (EV_A);
646} 2106}
647 2107
648static void 2108void inline_size
649ev_stop (W w) 2109ev_stop (EV_P_ W w)
650{ 2110{
2111 ev_unref (EV_A);
651 w->active = 0; 2112 w->active = 0;
652} 2113}
653 2114
654/*****************************************************************************/ 2115/*****************************************************************************/
655 2116
656void 2117void noinline
657evio_start (struct ev_io *w) 2118ev_io_start (EV_P_ ev_io *w)
658{ 2119{
2120 int fd = w->fd;
2121
659 if (ev_is_active (w)) 2122 if (expect_false (ev_is_active (w)))
660 return; 2123 return;
661 2124
662 int fd = w->fd; 2125 assert (("ev_io_start called with negative fd", fd >= 0));
2126 assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));
663 2127
2128 EV_FREQUENT_CHECK;
2129
664 ev_start ((W)w, 1); 2130 ev_start (EV_A_ (W)w, 1);
665 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2131 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
666 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2132 wlist_add (&anfds[fd].head, (WL)w);
667 2133
668 ++fdchangecnt; 2134 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
669 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 2135 w->events &= ~EV_IOFDSET;
670 fdchanges [fdchangecnt - 1] = fd;
671}
672 2136
673void 2137 EV_FREQUENT_CHECK;
2138}
2139
2140void noinline
674evio_stop (struct ev_io *w) 2141ev_io_stop (EV_P_ ev_io *w)
675{ 2142{
676 ev_clear ((W)w); 2143 clear_pending (EV_A_ (W)w);
677 if (!ev_is_active (w)) 2144 if (expect_false (!ev_is_active (w)))
678 return; 2145 return;
679 2146
2147 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2148
2149 EV_FREQUENT_CHECK;
2150
680 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2151 wlist_del (&anfds[w->fd].head, (WL)w);
681 ev_stop ((W)w); 2152 ev_stop (EV_A_ (W)w);
682 2153
683 ++fdchangecnt; 2154 fd_change (EV_A_ w->fd, 1);
684 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
685 fdchanges [fdchangecnt - 1] = w->fd;
686}
687 2155
688void 2156 EV_FREQUENT_CHECK;
2157}
2158
2159void noinline
689evtimer_start (struct ev_timer *w) 2160ev_timer_start (EV_P_ ev_timer *w)
690{ 2161{
691 if (ev_is_active (w)) 2162 if (expect_false (ev_is_active (w)))
692 return; 2163 return;
693 2164
694 w->at += now; 2165 ev_at (w) += mn_now;
695 2166
696 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 2167 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
697 2168
698 ev_start ((W)w, ++timercnt); 2169 EV_FREQUENT_CHECK;
699 array_needsize (timers, timermax, timercnt, );
700 timers [timercnt - 1] = w;
701 upheap ((WT *)timers, timercnt - 1);
702}
703 2170
704void 2171 ++timercnt;
2172 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2173 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2174 ANHE_w (timers [ev_active (w)]) = (WT)w;
2175 ANHE_at_cache (timers [ev_active (w)]);
2176 upheap (timers, ev_active (w));
2177
2178 EV_FREQUENT_CHECK;
2179
2180 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2181}
2182
2183void noinline
705evtimer_stop (struct ev_timer *w) 2184ev_timer_stop (EV_P_ ev_timer *w)
706{ 2185{
707 ev_clear ((W)w); 2186 clear_pending (EV_A_ (W)w);
708 if (!ev_is_active (w)) 2187 if (expect_false (!ev_is_active (w)))
709 return; 2188 return;
710 2189
711 if (w->active < timercnt--) 2190 EV_FREQUENT_CHECK;
2191
2192 {
2193 int active = ev_active (w);
2194
2195 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2196
2197 --timercnt;
2198
2199 if (expect_true (active < timercnt + HEAP0))
712 { 2200 {
713 timers [w->active - 1] = timers [timercnt]; 2201 timers [active] = timers [timercnt + HEAP0];
714 downheap ((WT *)timers, timercnt, w->active - 1); 2202 adjustheap (timers, timercnt, active);
715 } 2203 }
2204 }
716 2205
717 w->at = w->repeat; 2206 EV_FREQUENT_CHECK;
718 2207
2208 ev_at (w) -= mn_now;
2209
719 ev_stop ((W)w); 2210 ev_stop (EV_A_ (W)w);
720} 2211}
721 2212
722void 2213void noinline
723evtimer_again (struct ev_timer *w) 2214ev_timer_again (EV_P_ ev_timer *w)
724{ 2215{
2216 EV_FREQUENT_CHECK;
2217
725 if (ev_is_active (w)) 2218 if (ev_is_active (w))
726 { 2219 {
727 if (w->repeat) 2220 if (w->repeat)
728 { 2221 {
729 w->at = now + w->repeat; 2222 ev_at (w) = mn_now + w->repeat;
2223 ANHE_at_cache (timers [ev_active (w)]);
730 downheap ((WT *)timers, timercnt, w->active - 1); 2224 adjustheap (timers, timercnt, ev_active (w));
731 } 2225 }
732 else 2226 else
733 evtimer_stop (w); 2227 ev_timer_stop (EV_A_ w);
734 } 2228 }
735 else if (w->repeat) 2229 else if (w->repeat)
2230 {
2231 ev_at (w) = w->repeat;
736 evtimer_start (w); 2232 ev_timer_start (EV_A_ w);
737} 2233 }
738 2234
739void 2235 EV_FREQUENT_CHECK;
2236}
2237
2238#if EV_PERIODIC_ENABLE
2239void noinline
740evperiodic_start (struct ev_periodic *w) 2240ev_periodic_start (EV_P_ ev_periodic *w)
741{ 2241{
742 if (ev_is_active (w)) 2242 if (expect_false (ev_is_active (w)))
743 return; 2243 return;
744 2244
745 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 2245 if (w->reschedule_cb)
746 2246 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2247 else if (w->interval)
2248 {
2249 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
747 /* this formula differs from the one in periodic_reify because we do not always round up */ 2250 /* this formula differs from the one in periodic_reify because we do not always round up */
748 if (w->interval)
749 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 2251 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2252 }
2253 else
2254 ev_at (w) = w->offset;
750 2255
2256 EV_FREQUENT_CHECK;
2257
2258 ++periodiccnt;
751 ev_start ((W)w, ++periodiccnt); 2259 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
752 array_needsize (periodics, periodicmax, periodiccnt, ); 2260 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
753 periodics [periodiccnt - 1] = w; 2261 ANHE_w (periodics [ev_active (w)]) = (WT)w;
754 upheap ((WT *)periodics, periodiccnt - 1); 2262 ANHE_at_cache (periodics [ev_active (w)]);
755} 2263 upheap (periodics, ev_active (w));
756 2264
757void 2265 EV_FREQUENT_CHECK;
2266
2267 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2268}
2269
2270void noinline
758evperiodic_stop (struct ev_periodic *w) 2271ev_periodic_stop (EV_P_ ev_periodic *w)
759{ 2272{
760 ev_clear ((W)w); 2273 clear_pending (EV_A_ (W)w);
761 if (!ev_is_active (w)) 2274 if (expect_false (!ev_is_active (w)))
762 return; 2275 return;
763 2276
764 if (w->active < periodiccnt--) 2277 EV_FREQUENT_CHECK;
2278
2279 {
2280 int active = ev_active (w);
2281
2282 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2283
2284 --periodiccnt;
2285
2286 if (expect_true (active < periodiccnt + HEAP0))
765 { 2287 {
766 periodics [w->active - 1] = periodics [periodiccnt]; 2288 periodics [active] = periodics [periodiccnt + HEAP0];
767 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2289 adjustheap (periodics, periodiccnt, active);
768 } 2290 }
2291 }
769 2292
2293 EV_FREQUENT_CHECK;
2294
770 ev_stop ((W)w); 2295 ev_stop (EV_A_ (W)w);
771} 2296}
772 2297
773void 2298void noinline
2299ev_periodic_again (EV_P_ ev_periodic *w)
2300{
2301 /* TODO: use adjustheap and recalculation */
2302 ev_periodic_stop (EV_A_ w);
2303 ev_periodic_start (EV_A_ w);
2304}
2305#endif
2306
2307#ifndef SA_RESTART
2308# define SA_RESTART 0
2309#endif
2310
2311void noinline
774evsignal_start (struct ev_signal *w) 2312ev_signal_start (EV_P_ ev_signal *w)
775{ 2313{
2314#if EV_MULTIPLICITY
2315 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2316#endif
776 if (ev_is_active (w)) 2317 if (expect_false (ev_is_active (w)))
777 return; 2318 return;
778 2319
2320 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2321
2322 evpipe_init (EV_A);
2323
2324 EV_FREQUENT_CHECK;
2325
2326 {
2327#ifndef _WIN32
2328 sigset_t full, prev;
2329 sigfillset (&full);
2330 sigprocmask (SIG_SETMASK, &full, &prev);
2331#endif
2332
2333 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2334
2335#ifndef _WIN32
2336 sigprocmask (SIG_SETMASK, &prev, 0);
2337#endif
2338 }
2339
779 ev_start ((W)w, 1); 2340 ev_start (EV_A_ (W)w, 1);
780 array_needsize (signals, signalmax, w->signum, signals_init);
781 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2341 wlist_add (&signals [w->signum - 1].head, (WL)w);
782 2342
783 if (!w->next) 2343 if (!((WL)w)->next)
784 { 2344 {
2345#if _WIN32
2346 signal (w->signum, ev_sighandler);
2347#else
785 struct sigaction sa; 2348 struct sigaction sa;
786 sa.sa_handler = sighandler; 2349 sa.sa_handler = ev_sighandler;
787 sigfillset (&sa.sa_mask); 2350 sigfillset (&sa.sa_mask);
788 sa.sa_flags = 0; 2351 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
789 sigaction (w->signum, &sa, 0); 2352 sigaction (w->signum, &sa, 0);
2353#endif
790 } 2354 }
791}
792 2355
793void 2356 EV_FREQUENT_CHECK;
2357}
2358
2359void noinline
794evsignal_stop (struct ev_signal *w) 2360ev_signal_stop (EV_P_ ev_signal *w)
795{ 2361{
796 ev_clear ((W)w); 2362 clear_pending (EV_A_ (W)w);
797 if (!ev_is_active (w)) 2363 if (expect_false (!ev_is_active (w)))
798 return; 2364 return;
799 2365
2366 EV_FREQUENT_CHECK;
2367
800 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2368 wlist_del (&signals [w->signum - 1].head, (WL)w);
801 ev_stop ((W)w); 2369 ev_stop (EV_A_ (W)w);
802 2370
803 if (!signals [w->signum - 1].head) 2371 if (!signals [w->signum - 1].head)
804 signal (w->signum, SIG_DFL); 2372 signal (w->signum, SIG_DFL);
805}
806 2373
807void evidle_start (struct ev_idle *w) 2374 EV_FREQUENT_CHECK;
2375}
2376
2377void
2378ev_child_start (EV_P_ ev_child *w)
808{ 2379{
2380#if EV_MULTIPLICITY
2381 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2382#endif
809 if (ev_is_active (w)) 2383 if (expect_false (ev_is_active (w)))
810 return; 2384 return;
811 2385
812 ev_start ((W)w, ++idlecnt); 2386 EV_FREQUENT_CHECK;
813 array_needsize (idles, idlemax, idlecnt, );
814 idles [idlecnt - 1] = w;
815}
816 2387
817void evidle_stop (struct ev_idle *w) 2388 ev_start (EV_A_ (W)w, 1);
2389 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2390
2391 EV_FREQUENT_CHECK;
2392}
2393
2394void
2395ev_child_stop (EV_P_ ev_child *w)
818{ 2396{
819 ev_clear ((W)w); 2397 clear_pending (EV_A_ (W)w);
820 if (ev_is_active (w)) 2398 if (expect_false (!ev_is_active (w)))
821 return; 2399 return;
822 2400
823 idles [w->active - 1] = idles [--idlecnt]; 2401 EV_FREQUENT_CHECK;
2402
2403 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
824 ev_stop ((W)w); 2404 ev_stop (EV_A_ (W)w);
825}
826 2405
827void evcheck_start (struct ev_check *w) 2406 EV_FREQUENT_CHECK;
2407}
2408
2409#if EV_STAT_ENABLE
2410
2411# ifdef _WIN32
2412# undef lstat
2413# define lstat(a,b) _stati64 (a,b)
2414# endif
2415
2416#define DEF_STAT_INTERVAL 5.0074891
2417#define MIN_STAT_INTERVAL 0.1074891
2418
2419static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2420
2421#if EV_USE_INOTIFY
2422# define EV_INOTIFY_BUFSIZE 8192
2423
2424static void noinline
2425infy_add (EV_P_ ev_stat *w)
828{ 2426{
829 if (ev_is_active (w)) 2427 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);
2428
2429 if (w->wd < 0)
2430 {
2431 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2432
2433 /* monitor some parent directory for speedup hints */
2434 /* note that exceeding the hardcoded limit is not a correctness issue, */
2435 /* but an efficiency issue only */
2436 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2437 {
2438 char path [4096];
2439 strcpy (path, w->path);
2440
2441 do
2442 {
2443 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2444 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2445
2446 char *pend = strrchr (path, '/');
2447
2448 if (!pend)
2449 break; /* whoops, no '/', complain to your admin */
2450
2451 *pend = 0;
2452 w->wd = inotify_add_watch (fs_fd, path, mask);
2453 }
2454 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2455 }
2456 }
2457 else
2458 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2459
2460 if (w->wd >= 0)
2461 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2462}
2463
2464static void noinline
2465infy_del (EV_P_ ev_stat *w)
2466{
2467 int slot;
2468 int wd = w->wd;
2469
2470 if (wd < 0)
830 return; 2471 return;
831 2472
2473 w->wd = -2;
2474 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2475 wlist_del (&fs_hash [slot].head, (WL)w);
2476
2477 /* remove this watcher, if others are watching it, they will rearm */
2478 inotify_rm_watch (fs_fd, wd);
2479}
2480
2481static void noinline
2482infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2483{
2484 if (slot < 0)
2485 /* overflow, need to check for all hash slots */
2486 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2487 infy_wd (EV_A_ slot, wd, ev);
2488 else
2489 {
2490 WL w_;
2491
2492 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2493 {
2494 ev_stat *w = (ev_stat *)w_;
2495 w_ = w_->next; /* lets us remove this watcher and all before it */
2496
2497 if (w->wd == wd || wd == -1)
2498 {
2499 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2500 {
2501 w->wd = -1;
2502 infy_add (EV_A_ w); /* re-add, no matter what */
2503 }
2504
2505 stat_timer_cb (EV_A_ &w->timer, 0);
2506 }
2507 }
2508 }
2509}
2510
2511static void
2512infy_cb (EV_P_ ev_io *w, int revents)
2513{
2514 char buf [EV_INOTIFY_BUFSIZE];
2515 struct inotify_event *ev = (struct inotify_event *)buf;
2516 int ofs;
2517 int len = read (fs_fd, buf, sizeof (buf));
2518
2519 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2520 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2521}
2522
2523void inline_size
2524infy_init (EV_P)
2525{
2526 if (fs_fd != -2)
2527 return;
2528
2529 /* kernels < 2.6.25 are borked
2530 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2531 */
2532 {
2533 struct utsname buf;
2534 int major, minor, micro;
2535
2536 fs_fd = -1;
2537
2538 if (uname (&buf))
2539 return;
2540
2541 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2542 return;
2543
2544 if (major < 2
2545 || (major == 2 && minor < 6)
2546 || (major == 2 && minor == 6 && micro < 25))
2547 return;
2548 }
2549
2550 fs_fd = inotify_init ();
2551
2552 if (fs_fd >= 0)
2553 {
2554 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2555 ev_set_priority (&fs_w, EV_MAXPRI);
2556 ev_io_start (EV_A_ &fs_w);
2557 }
2558}
2559
2560void inline_size
2561infy_fork (EV_P)
2562{
2563 int slot;
2564
2565 if (fs_fd < 0)
2566 return;
2567
2568 close (fs_fd);
2569 fs_fd = inotify_init ();
2570
2571 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2572 {
2573 WL w_ = fs_hash [slot].head;
2574 fs_hash [slot].head = 0;
2575
2576 while (w_)
2577 {
2578 ev_stat *w = (ev_stat *)w_;
2579 w_ = w_->next; /* lets us add this watcher */
2580
2581 w->wd = -1;
2582
2583 if (fs_fd >= 0)
2584 infy_add (EV_A_ w); /* re-add, no matter what */
2585 else
2586 ev_timer_start (EV_A_ &w->timer);
2587 }
2588 }
2589}
2590
2591#endif
2592
2593#ifdef _WIN32
2594# define EV_LSTAT(p,b) _stati64 (p, b)
2595#else
2596# define EV_LSTAT(p,b) lstat (p, b)
2597#endif
2598
2599void
2600ev_stat_stat (EV_P_ ev_stat *w)
2601{
2602 if (lstat (w->path, &w->attr) < 0)
2603 w->attr.st_nlink = 0;
2604 else if (!w->attr.st_nlink)
2605 w->attr.st_nlink = 1;
2606}
2607
2608static void noinline
2609stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2610{
2611 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2612
2613 /* we copy this here each the time so that */
2614 /* prev has the old value when the callback gets invoked */
2615 w->prev = w->attr;
2616 ev_stat_stat (EV_A_ w);
2617
2618 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2619 if (
2620 w->prev.st_dev != w->attr.st_dev
2621 || w->prev.st_ino != w->attr.st_ino
2622 || w->prev.st_mode != w->attr.st_mode
2623 || w->prev.st_nlink != w->attr.st_nlink
2624 || w->prev.st_uid != w->attr.st_uid
2625 || w->prev.st_gid != w->attr.st_gid
2626 || w->prev.st_rdev != w->attr.st_rdev
2627 || w->prev.st_size != w->attr.st_size
2628 || w->prev.st_atime != w->attr.st_atime
2629 || w->prev.st_mtime != w->attr.st_mtime
2630 || w->prev.st_ctime != w->attr.st_ctime
2631 ) {
2632 #if EV_USE_INOTIFY
2633 if (fs_fd >= 0)
2634 {
2635 infy_del (EV_A_ w);
2636 infy_add (EV_A_ w);
2637 ev_stat_stat (EV_A_ w); /* avoid race... */
2638 }
2639 #endif
2640
2641 ev_feed_event (EV_A_ w, EV_STAT);
2642 }
2643}
2644
2645void
2646ev_stat_start (EV_P_ ev_stat *w)
2647{
2648 if (expect_false (ev_is_active (w)))
2649 return;
2650
2651 /* since we use memcmp, we need to clear any padding data etc. */
2652 memset (&w->prev, 0, sizeof (ev_statdata));
2653 memset (&w->attr, 0, sizeof (ev_statdata));
2654
2655 ev_stat_stat (EV_A_ w);
2656
2657 if (w->interval < MIN_STAT_INTERVAL)
2658 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2659
2660 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2661 ev_set_priority (&w->timer, ev_priority (w));
2662
2663#if EV_USE_INOTIFY
2664 infy_init (EV_A);
2665
2666 if (fs_fd >= 0)
2667 infy_add (EV_A_ w);
2668 else
2669#endif
2670 ev_timer_start (EV_A_ &w->timer);
2671
2672 ev_start (EV_A_ (W)w, 1);
2673
2674 EV_FREQUENT_CHECK;
2675}
2676
2677void
2678ev_stat_stop (EV_P_ ev_stat *w)
2679{
2680 clear_pending (EV_A_ (W)w);
2681 if (expect_false (!ev_is_active (w)))
2682 return;
2683
2684 EV_FREQUENT_CHECK;
2685
2686#if EV_USE_INOTIFY
2687 infy_del (EV_A_ w);
2688#endif
2689 ev_timer_stop (EV_A_ &w->timer);
2690
2691 ev_stop (EV_A_ (W)w);
2692
2693 EV_FREQUENT_CHECK;
2694}
2695#endif
2696
2697#if EV_IDLE_ENABLE
2698void
2699ev_idle_start (EV_P_ ev_idle *w)
2700{
2701 if (expect_false (ev_is_active (w)))
2702 return;
2703
2704 pri_adjust (EV_A_ (W)w);
2705
2706 EV_FREQUENT_CHECK;
2707
2708 {
2709 int active = ++idlecnt [ABSPRI (w)];
2710
2711 ++idleall;
2712 ev_start (EV_A_ (W)w, active);
2713
2714 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2715 idles [ABSPRI (w)][active - 1] = w;
2716 }
2717
2718 EV_FREQUENT_CHECK;
2719}
2720
2721void
2722ev_idle_stop (EV_P_ ev_idle *w)
2723{
2724 clear_pending (EV_A_ (W)w);
2725 if (expect_false (!ev_is_active (w)))
2726 return;
2727
2728 EV_FREQUENT_CHECK;
2729
2730 {
2731 int active = ev_active (w);
2732
2733 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2734 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2735
2736 ev_stop (EV_A_ (W)w);
2737 --idleall;
2738 }
2739
2740 EV_FREQUENT_CHECK;
2741}
2742#endif
2743
2744void
2745ev_prepare_start (EV_P_ ev_prepare *w)
2746{
2747 if (expect_false (ev_is_active (w)))
2748 return;
2749
2750 EV_FREQUENT_CHECK;
2751
2752 ev_start (EV_A_ (W)w, ++preparecnt);
2753 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2754 prepares [preparecnt - 1] = w;
2755
2756 EV_FREQUENT_CHECK;
2757}
2758
2759void
2760ev_prepare_stop (EV_P_ ev_prepare *w)
2761{
2762 clear_pending (EV_A_ (W)w);
2763 if (expect_false (!ev_is_active (w)))
2764 return;
2765
2766 EV_FREQUENT_CHECK;
2767
2768 {
2769 int active = ev_active (w);
2770
2771 prepares [active - 1] = prepares [--preparecnt];
2772 ev_active (prepares [active - 1]) = active;
2773 }
2774
2775 ev_stop (EV_A_ (W)w);
2776
2777 EV_FREQUENT_CHECK;
2778}
2779
2780void
2781ev_check_start (EV_P_ ev_check *w)
2782{
2783 if (expect_false (ev_is_active (w)))
2784 return;
2785
2786 EV_FREQUENT_CHECK;
2787
832 ev_start ((W)w, ++checkcnt); 2788 ev_start (EV_A_ (W)w, ++checkcnt);
833 array_needsize (checks, checkmax, checkcnt, ); 2789 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
834 checks [checkcnt - 1] = w; 2790 checks [checkcnt - 1] = w;
835}
836 2791
2792 EV_FREQUENT_CHECK;
2793}
2794
2795void
837void evcheck_stop (struct ev_check *w) 2796ev_check_stop (EV_P_ ev_check *w)
838{ 2797{
839 ev_clear ((W)w); 2798 clear_pending (EV_A_ (W)w);
840 if (ev_is_active (w)) 2799 if (expect_false (!ev_is_active (w)))
841 return; 2800 return;
842 2801
2802 EV_FREQUENT_CHECK;
2803
2804 {
2805 int active = ev_active (w);
2806
843 checks [w->active - 1] = checks [--checkcnt]; 2807 checks [active - 1] = checks [--checkcnt];
2808 ev_active (checks [active - 1]) = active;
2809 }
2810
844 ev_stop ((W)w); 2811 ev_stop (EV_A_ (W)w);
2812
2813 EV_FREQUENT_CHECK;
845} 2814}
2815
2816#if EV_EMBED_ENABLE
2817void noinline
2818ev_embed_sweep (EV_P_ ev_embed *w)
2819{
2820 ev_loop (w->other, EVLOOP_NONBLOCK);
2821}
2822
2823static void
2824embed_io_cb (EV_P_ ev_io *io, int revents)
2825{
2826 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2827
2828 if (ev_cb (w))
2829 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2830 else
2831 ev_loop (w->other, EVLOOP_NONBLOCK);
2832}
2833
2834static void
2835embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2836{
2837 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2838
2839 {
2840 struct ev_loop *loop = w->other;
2841
2842 while (fdchangecnt)
2843 {
2844 fd_reify (EV_A);
2845 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2846 }
2847 }
2848}
2849
2850static void
2851embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2852{
2853 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2854
2855 {
2856 struct ev_loop *loop = w->other;
2857
2858 ev_loop_fork (EV_A);
2859 }
2860}
2861
2862#if 0
2863static void
2864embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2865{
2866 ev_idle_stop (EV_A_ idle);
2867}
2868#endif
2869
2870void
2871ev_embed_start (EV_P_ ev_embed *w)
2872{
2873 if (expect_false (ev_is_active (w)))
2874 return;
2875
2876 {
2877 struct ev_loop *loop = w->other;
2878 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2879 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2880 }
2881
2882 EV_FREQUENT_CHECK;
2883
2884 ev_set_priority (&w->io, ev_priority (w));
2885 ev_io_start (EV_A_ &w->io);
2886
2887 ev_prepare_init (&w->prepare, embed_prepare_cb);
2888 ev_set_priority (&w->prepare, EV_MINPRI);
2889 ev_prepare_start (EV_A_ &w->prepare);
2890
2891 ev_fork_init (&w->fork, embed_fork_cb);
2892 ev_fork_start (EV_A_ &w->fork);
2893
2894 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2895
2896 ev_start (EV_A_ (W)w, 1);
2897
2898 EV_FREQUENT_CHECK;
2899}
2900
2901void
2902ev_embed_stop (EV_P_ ev_embed *w)
2903{
2904 clear_pending (EV_A_ (W)w);
2905 if (expect_false (!ev_is_active (w)))
2906 return;
2907
2908 EV_FREQUENT_CHECK;
2909
2910 ev_io_stop (EV_A_ &w->io);
2911 ev_prepare_stop (EV_A_ &w->prepare);
2912 ev_fork_stop (EV_A_ &w->fork);
2913
2914 EV_FREQUENT_CHECK;
2915}
2916#endif
2917
2918#if EV_FORK_ENABLE
2919void
2920ev_fork_start (EV_P_ ev_fork *w)
2921{
2922 if (expect_false (ev_is_active (w)))
2923 return;
2924
2925 EV_FREQUENT_CHECK;
2926
2927 ev_start (EV_A_ (W)w, ++forkcnt);
2928 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2929 forks [forkcnt - 1] = w;
2930
2931 EV_FREQUENT_CHECK;
2932}
2933
2934void
2935ev_fork_stop (EV_P_ ev_fork *w)
2936{
2937 clear_pending (EV_A_ (W)w);
2938 if (expect_false (!ev_is_active (w)))
2939 return;
2940
2941 EV_FREQUENT_CHECK;
2942
2943 {
2944 int active = ev_active (w);
2945
2946 forks [active - 1] = forks [--forkcnt];
2947 ev_active (forks [active - 1]) = active;
2948 }
2949
2950 ev_stop (EV_A_ (W)w);
2951
2952 EV_FREQUENT_CHECK;
2953}
2954#endif
2955
2956#if EV_ASYNC_ENABLE
2957void
2958ev_async_start (EV_P_ ev_async *w)
2959{
2960 if (expect_false (ev_is_active (w)))
2961 return;
2962
2963 evpipe_init (EV_A);
2964
2965 EV_FREQUENT_CHECK;
2966
2967 ev_start (EV_A_ (W)w, ++asynccnt);
2968 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2969 asyncs [asynccnt - 1] = w;
2970
2971 EV_FREQUENT_CHECK;
2972}
2973
2974void
2975ev_async_stop (EV_P_ ev_async *w)
2976{
2977 clear_pending (EV_A_ (W)w);
2978 if (expect_false (!ev_is_active (w)))
2979 return;
2980
2981 EV_FREQUENT_CHECK;
2982
2983 {
2984 int active = ev_active (w);
2985
2986 asyncs [active - 1] = asyncs [--asynccnt];
2987 ev_active (asyncs [active - 1]) = active;
2988 }
2989
2990 ev_stop (EV_A_ (W)w);
2991
2992 EV_FREQUENT_CHECK;
2993}
2994
2995void
2996ev_async_send (EV_P_ ev_async *w)
2997{
2998 w->sent = 1;
2999 evpipe_write (EV_A_ &gotasync);
3000}
3001#endif
846 3002
847/*****************************************************************************/ 3003/*****************************************************************************/
848 3004
849struct ev_once 3005struct ev_once
850{ 3006{
851 struct ev_io io; 3007 ev_io io;
852 struct ev_timer to; 3008 ev_timer to;
853 void (*cb)(int revents, void *arg); 3009 void (*cb)(int revents, void *arg);
854 void *arg; 3010 void *arg;
855}; 3011};
856 3012
857static void 3013static void
858once_cb (struct ev_once *once, int revents) 3014once_cb (EV_P_ struct ev_once *once, int revents)
859{ 3015{
860 void (*cb)(int revents, void *arg) = once->cb; 3016 void (*cb)(int revents, void *arg) = once->cb;
861 void *arg = once->arg; 3017 void *arg = once->arg;
862 3018
863 evio_stop (&once->io); 3019 ev_io_stop (EV_A_ &once->io);
864 evtimer_stop (&once->to); 3020 ev_timer_stop (EV_A_ &once->to);
865 free (once); 3021 ev_free (once);
866 3022
867 cb (revents, arg); 3023 cb (revents, arg);
868} 3024}
869 3025
870static void 3026static void
871once_cb_io (struct ev_io *w, int revents) 3027once_cb_io (EV_P_ ev_io *w, int revents)
872{ 3028{
873 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3029 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3030
3031 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
874} 3032}
875 3033
876static void 3034static void
877once_cb_to (struct ev_timer *w, int revents) 3035once_cb_to (EV_P_ ev_timer *w, int revents)
878{ 3036{
879 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3037 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
880}
881 3038
3039 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3040}
3041
882void 3042void
883ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3043ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
884{ 3044{
885 struct ev_once *once = malloc (sizeof (struct ev_once)); 3045 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
886 3046
887 if (!once) 3047 if (expect_false (!once))
888 cb (EV_ERROR, arg); 3048 {
889 else 3049 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
3050 return;
890 { 3051 }
3052
891 once->cb = cb; 3053 once->cb = cb;
892 once->arg = arg; 3054 once->arg = arg;
893 3055
894 evw_init (&once->io, once_cb_io); 3056 ev_init (&once->io, once_cb_io);
895
896 if (fd >= 0) 3057 if (fd >= 0)
897 { 3058 {
898 evio_set (&once->io, fd, events); 3059 ev_io_set (&once->io, fd, events);
899 evio_start (&once->io); 3060 ev_io_start (EV_A_ &once->io);
900 } 3061 }
901 3062
902 evw_init (&once->to, once_cb_to); 3063 ev_init (&once->to, once_cb_to);
903
904 if (timeout >= 0.) 3064 if (timeout >= 0.)
905 { 3065 {
906 evtimer_set (&once->to, timeout, 0.); 3066 ev_timer_set (&once->to, timeout, 0.);
907 evtimer_start (&once->to); 3067 ev_timer_start (EV_A_ &once->to);
908 }
909 }
910}
911
912/*****************************************************************************/
913
914#if 0
915
916struct ev_io wio;
917
918static void
919sin_cb (struct ev_io *w, int revents)
920{
921 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
922}
923
924static void
925ocb (struct ev_timer *w, int revents)
926{
927 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
928 evtimer_stop (w);
929 evtimer_start (w);
930}
931
932static void
933scb (struct ev_signal *w, int revents)
934{
935 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
936 evio_stop (&wio);
937 evio_start (&wio);
938}
939
940static void
941gcb (struct ev_signal *w, int revents)
942{
943 fprintf (stderr, "generic %x\n", revents);
944
945}
946
947int main (void)
948{
949 ev_init (0);
950
951 evio_init (&wio, sin_cb, 0, EV_READ);
952 evio_start (&wio);
953
954 struct ev_timer t[10000];
955
956#if 0
957 int i;
958 for (i = 0; i < 10000; ++i)
959 { 3068 }
960 struct ev_timer *w = t + i;
961 evw_init (w, ocb, i);
962 evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
963 evtimer_start (w);
964 if (drand48 () < 0.5)
965 evtimer_stop (w);
966 }
967#endif
968
969 struct ev_timer t1;
970 evtimer_init (&t1, ocb, 5, 10);
971 evtimer_start (&t1);
972
973 struct ev_signal sig;
974 evsignal_init (&sig, scb, SIGQUIT);
975 evsignal_start (&sig);
976
977 struct ev_check cw;
978 evcheck_init (&cw, gcb);
979 evcheck_start (&cw);
980
981 struct ev_idle iw;
982 evidle_init (&iw, gcb);
983 evidle_start (&iw);
984
985 ev_loop (0);
986
987 return 0;
988} 3069}
989 3070
3071#if EV_MULTIPLICITY
3072 #include "ev_wrap.h"
990#endif 3073#endif
991 3074
3075#ifdef __cplusplus
3076}
3077#endif
992 3078
993
994

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