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Comparing libev/ev.c (file contents):
Revision 1.38 by root, Thu Nov 1 15:21:13 2007 UTC vs.
Revision 1.285 by root, Wed Apr 15 19:35:53 2009 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * 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.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * 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
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE
31#if EV_USE_CONFIG_H 46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
32# include "config.h" 49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 0
57# endif
58# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1
60# endif
61# endif
62# endif
63
64# if HAVE_CLOCK_GETTIME
65# ifndef EV_USE_MONOTONIC
66# define EV_USE_MONOTONIC 1
67# endif
68# ifndef EV_USE_REALTIME
69# define EV_USE_REALTIME 0
70# endif
71# else
72# ifndef EV_USE_MONOTONIC
73# define EV_USE_MONOTONIC 0
74# endif
75# ifndef EV_USE_REALTIME
76# define EV_USE_REALTIME 0
77# endif
78# endif
79
80# ifndef EV_USE_NANOSLEEP
81# if HAVE_NANOSLEEP
82# define EV_USE_NANOSLEEP 1
83# else
84# define EV_USE_NANOSLEEP 0
85# endif
86# endif
87
88# ifndef EV_USE_SELECT
89# if HAVE_SELECT && HAVE_SYS_SELECT_H
90# define EV_USE_SELECT 1
91# else
92# define EV_USE_SELECT 0
93# endif
94# endif
95
96# ifndef EV_USE_POLL
97# if HAVE_POLL && HAVE_POLL_H
98# define EV_USE_POLL 1
99# else
100# define EV_USE_POLL 0
101# endif
102# endif
103
104# ifndef EV_USE_EPOLL
105# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
106# define EV_USE_EPOLL 1
107# else
108# define EV_USE_EPOLL 0
109# endif
110# endif
111
112# ifndef EV_USE_KQUEUE
113# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
114# define EV_USE_KQUEUE 1
115# else
116# define EV_USE_KQUEUE 0
117# endif
118# endif
119
120# ifndef EV_USE_PORT
121# if HAVE_PORT_H && HAVE_PORT_CREATE
122# define EV_USE_PORT 1
123# else
124# define EV_USE_PORT 0
125# endif
126# endif
127
128# ifndef EV_USE_INOTIFY
129# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
130# define EV_USE_INOTIFY 1
131# else
132# define EV_USE_INOTIFY 0
133# endif
134# endif
135
136# ifndef EV_USE_EVENTFD
137# if HAVE_EVENTFD
138# define EV_USE_EVENTFD 1
139# else
140# define EV_USE_EVENTFD 0
141# endif
142# endif
143
33#endif 144#endif
34 145
35#include <math.h> 146#include <math.h>
36#include <stdlib.h> 147#include <stdlib.h>
37#include <unistd.h>
38#include <fcntl.h> 148#include <fcntl.h>
39#include <signal.h>
40#include <stddef.h> 149#include <stddef.h>
41 150
42#include <stdio.h> 151#include <stdio.h>
43 152
44#include <assert.h> 153#include <assert.h>
45#include <errno.h> 154#include <errno.h>
46#include <sys/types.h> 155#include <sys/types.h>
47#include <sys/wait.h>
48#include <sys/time.h>
49#include <time.h> 156#include <time.h>
50 157
158#include <signal.h>
159
160#ifdef EV_H
161# include EV_H
162#else
163# include "ev.h"
164#endif
165
166#ifndef _WIN32
167# include <sys/time.h>
168# include <sys/wait.h>
169# include <unistd.h>
170#else
171# include <io.h>
172# define WIN32_LEAN_AND_MEAN
173# include <windows.h>
174# ifndef EV_SELECT_IS_WINSOCKET
175# define EV_SELECT_IS_WINSOCKET 1
176# endif
177#endif
178
179/* this block tries to deduce configuration from header-defined symbols and defaults */
180
181#ifndef EV_USE_CLOCK_SYSCALL
182# if __linux && __GLIBC__ >= 2
183# define EV_USE_CLOCK_SYSCALL 1
184# else
185# define EV_USE_CLOCK_SYSCALL 0
186# endif
187#endif
188
51#ifndef EV_USE_MONOTONIC 189#ifndef EV_USE_MONOTONIC
190# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
52# define EV_USE_MONOTONIC 1 191# define EV_USE_MONOTONIC 1
192# else
193# define EV_USE_MONOTONIC 0
53#endif 194# endif
195#endif
196
197#ifndef EV_USE_REALTIME
198# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
199#endif
200
201#ifndef EV_USE_NANOSLEEP
202# if _POSIX_C_SOURCE >= 199309L
203# define EV_USE_NANOSLEEP 1
204# else
205# define EV_USE_NANOSLEEP 0
206# endif
207#endif
208
209#ifndef EV_USE_SELECT
210# define EV_USE_SELECT 1
211#endif
212
213#ifndef EV_USE_POLL
214# ifdef _WIN32
215# define EV_USE_POLL 0
216# else
217# define EV_USE_POLL 1
218# endif
219#endif
220
221#ifndef EV_USE_EPOLL
222# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
223# define EV_USE_EPOLL 1
224# else
225# define EV_USE_EPOLL 0
226# endif
227#endif
228
229#ifndef EV_USE_KQUEUE
230# define EV_USE_KQUEUE 0
231#endif
232
233#ifndef EV_USE_PORT
234# define EV_USE_PORT 0
235#endif
236
237#ifndef EV_USE_INOTIFY
238# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
239# define EV_USE_INOTIFY 1
240# else
241# define EV_USE_INOTIFY 0
242# endif
243#endif
244
245#ifndef EV_PID_HASHSIZE
246# if EV_MINIMAL
247# define EV_PID_HASHSIZE 1
248# else
249# define EV_PID_HASHSIZE 16
250# endif
251#endif
252
253#ifndef EV_INOTIFY_HASHSIZE
254# if EV_MINIMAL
255# define EV_INOTIFY_HASHSIZE 1
256# else
257# define EV_INOTIFY_HASHSIZE 16
258# endif
259#endif
260
261#ifndef EV_USE_EVENTFD
262# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
263# define EV_USE_EVENTFD 1
264# else
265# define EV_USE_EVENTFD 0
266# endif
267#endif
268
269#if 0 /* debugging */
270# define EV_VERIFY 3
271# define EV_USE_4HEAP 1
272# define EV_HEAP_CACHE_AT 1
273#endif
274
275#ifndef EV_VERIFY
276# define EV_VERIFY !EV_MINIMAL
277#endif
278
279#ifndef EV_USE_4HEAP
280# define EV_USE_4HEAP !EV_MINIMAL
281#endif
282
283#ifndef EV_HEAP_CACHE_AT
284# define EV_HEAP_CACHE_AT !EV_MINIMAL
285#endif
286
287/* this block fixes any misconfiguration where we know we run into trouble otherwise */
54 288
55#ifndef CLOCK_MONOTONIC 289#ifndef CLOCK_MONOTONIC
56# undef EV_USE_MONOTONIC 290# undef EV_USE_MONOTONIC
57# define EV_USE_MONOTONIC 0 291# define EV_USE_MONOTONIC 0
58#endif 292#endif
59 293
60#ifndef EV_USE_SELECT
61# define EV_USE_SELECT 1
62#endif
63
64#ifndef EV_USE_EPOLL
65# define EV_USE_EPOLL 0
66#endif
67
68#ifndef CLOCK_REALTIME 294#ifndef CLOCK_REALTIME
295# undef EV_USE_REALTIME
69# define EV_USE_REALTIME 0 296# define EV_USE_REALTIME 0
70#endif 297#endif
71#ifndef EV_USE_REALTIME 298
72# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */ 299#if !EV_STAT_ENABLE
300# undef EV_USE_INOTIFY
301# define EV_USE_INOTIFY 0
302#endif
303
304#if !EV_USE_NANOSLEEP
305# ifndef _WIN32
306# include <sys/select.h>
73#endif 307# endif
308#endif
309
310#if EV_USE_INOTIFY
311# include <sys/utsname.h>
312# include <sys/statfs.h>
313# include <sys/inotify.h>
314/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
315# ifndef IN_DONT_FOLLOW
316# undef EV_USE_INOTIFY
317# define EV_USE_INOTIFY 0
318# endif
319#endif
320
321#if EV_SELECT_IS_WINSOCKET
322# include <winsock.h>
323#endif
324
325/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
326/* which makes programs even slower. might work on other unices, too. */
327#if EV_USE_CLOCK_SYSCALL
328# include <syscall.h>
329# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
330# undef EV_USE_MONOTONIC
331# define EV_USE_MONOTONIC 1
332#endif
333
334#if EV_USE_EVENTFD
335/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
336# include <stdint.h>
337# ifdef __cplusplus
338extern "C" {
339# endif
340int eventfd (unsigned int initval, int flags);
341# ifdef __cplusplus
342}
343# endif
344#endif
345
346/**/
347
348#if EV_VERIFY >= 3
349# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
350#else
351# define EV_FREQUENT_CHECK do { } while (0)
352#endif
353
354/*
355 * This is used to avoid floating point rounding problems.
356 * It is added to ev_rt_now when scheduling periodics
357 * to ensure progress, time-wise, even when rounding
358 * errors are against us.
359 * This value is good at least till the year 4000.
360 * Better solutions welcome.
361 */
362#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
74 363
75#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 364#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
76#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */ 365#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
77#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
78#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */ 366/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
79 367
80#include "ev.h" 368#if __GNUC__ >= 4
369# define expect(expr,value) __builtin_expect ((expr),(value))
370# define noinline __attribute__ ((noinline))
371#else
372# define expect(expr,value) (expr)
373# define noinline
374# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
375# define inline
376# endif
377#endif
81 378
379#define expect_false(expr) expect ((expr) != 0, 0)
380#define expect_true(expr) expect ((expr) != 0, 1)
381#define inline_size static inline
382
383#if EV_MINIMAL
384# define inline_speed static noinline
385#else
386# define inline_speed static inline
387#endif
388
389#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
390#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
391
392#define EMPTY /* required for microsofts broken pseudo-c compiler */
393#define EMPTY2(a,b) /* used to suppress some warnings */
394
82typedef struct ev_watcher *W; 395typedef ev_watcher *W;
83typedef struct ev_watcher_list *WL; 396typedef ev_watcher_list *WL;
84typedef struct ev_watcher_time *WT; 397typedef ev_watcher_time *WT;
85 398
86static ev_tstamp now, diff; /* monotonic clock */ 399#define ev_active(w) ((W)(w))->active
400#define ev_at(w) ((WT)(w))->at
401
402#if EV_USE_REALTIME
403/* sig_atomic_t is used to avoid per-thread variables or locking but still */
404/* giving it a reasonably high chance of working on typical architetcures */
405static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
406#endif
407
408#if EV_USE_MONOTONIC
409static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
410#endif
411
412#ifdef _WIN32
413# include "ev_win32.c"
414#endif
415
416/*****************************************************************************/
417
418static void (*syserr_cb)(const char *msg);
419
420void
421ev_set_syserr_cb (void (*cb)(const char *msg))
422{
423 syserr_cb = cb;
424}
425
426static void noinline
427ev_syserr (const char *msg)
428{
429 if (!msg)
430 msg = "(libev) system error";
431
432 if (syserr_cb)
433 syserr_cb (msg);
434 else
435 {
436 perror (msg);
437 abort ();
438 }
439}
440
441static void *
442ev_realloc_emul (void *ptr, long size)
443{
444 /* some systems, notably openbsd and darwin, fail to properly
445 * implement realloc (x, 0) (as required by both ansi c-98 and
446 * the single unix specification, so work around them here.
447 */
448
449 if (size)
450 return realloc (ptr, size);
451
452 free (ptr);
453 return 0;
454}
455
456static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
457
458void
459ev_set_allocator (void *(*cb)(void *ptr, long size))
460{
461 alloc = cb;
462}
463
464inline_speed void *
465ev_realloc (void *ptr, long size)
466{
467 ptr = alloc (ptr, size);
468
469 if (!ptr && size)
470 {
471 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
472 abort ();
473 }
474
475 return ptr;
476}
477
478#define ev_malloc(size) ev_realloc (0, (size))
479#define ev_free(ptr) ev_realloc ((ptr), 0)
480
481/*****************************************************************************/
482
483typedef struct
484{
485 WL head;
486 unsigned char events;
487 unsigned char reify;
488 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
489 unsigned char unused;
490#if EV_USE_EPOLL
491 unsigned int egen; /* generation counter to counter epoll bugs */
492#endif
493#if EV_SELECT_IS_WINSOCKET
494 SOCKET handle;
495#endif
496} ANFD;
497
498typedef struct
499{
500 W w;
501 int events;
502} ANPENDING;
503
504#if EV_USE_INOTIFY
505/* hash table entry per inotify-id */
506typedef struct
507{
508 WL head;
509} ANFS;
510#endif
511
512/* Heap Entry */
513#if EV_HEAP_CACHE_AT
514 typedef struct {
515 ev_tstamp at;
516 WT w;
517 } ANHE;
518
519 #define ANHE_w(he) (he).w /* access watcher, read-write */
520 #define ANHE_at(he) (he).at /* access cached at, read-only */
521 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
522#else
523 typedef WT ANHE;
524
525 #define ANHE_w(he) (he)
526 #define ANHE_at(he) (he)->at
527 #define ANHE_at_cache(he)
528#endif
529
530#if EV_MULTIPLICITY
531
532 struct ev_loop
533 {
534 ev_tstamp ev_rt_now;
535 #define ev_rt_now ((loop)->ev_rt_now)
536 #define VAR(name,decl) decl;
537 #include "ev_vars.h"
538 #undef VAR
539 };
540 #include "ev_wrap.h"
541
542 static struct ev_loop default_loop_struct;
543 struct ev_loop *ev_default_loop_ptr;
544
545#else
546
87ev_tstamp ev_now; 547 ev_tstamp ev_rt_now;
88int ev_method; 548 #define VAR(name,decl) static decl;
549 #include "ev_vars.h"
550 #undef VAR
89 551
90static int have_monotonic; /* runtime */ 552 static int ev_default_loop_ptr;
91 553
92static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 554#endif
93static void (*method_modify)(int fd, int oev, int nev);
94static void (*method_poll)(ev_tstamp timeout);
95 555
96/*****************************************************************************/ 556/*****************************************************************************/
97 557
98ev_tstamp 558ev_tstamp
99ev_time (void) 559ev_time (void)
100{ 560{
101#if EV_USE_REALTIME 561#if EV_USE_REALTIME
562 if (expect_true (have_realtime))
563 {
102 struct timespec ts; 564 struct timespec ts;
103 clock_gettime (CLOCK_REALTIME, &ts); 565 clock_gettime (CLOCK_REALTIME, &ts);
104 return ts.tv_sec + ts.tv_nsec * 1e-9; 566 return ts.tv_sec + ts.tv_nsec * 1e-9;
105#else 567 }
568#endif
569
106 struct timeval tv; 570 struct timeval tv;
107 gettimeofday (&tv, 0); 571 gettimeofday (&tv, 0);
108 return tv.tv_sec + tv.tv_usec * 1e-6; 572 return tv.tv_sec + tv.tv_usec * 1e-6;
109#endif
110} 573}
111 574
112static ev_tstamp 575inline_size ev_tstamp
113get_clock (void) 576get_clock (void)
114{ 577{
115#if EV_USE_MONOTONIC 578#if EV_USE_MONOTONIC
116 if (have_monotonic) 579 if (expect_true (have_monotonic))
117 { 580 {
118 struct timespec ts; 581 struct timespec ts;
119 clock_gettime (CLOCK_MONOTONIC, &ts); 582 clock_gettime (CLOCK_MONOTONIC, &ts);
120 return ts.tv_sec + ts.tv_nsec * 1e-9; 583 return ts.tv_sec + ts.tv_nsec * 1e-9;
121 } 584 }
122#endif 585#endif
123 586
124 return ev_time (); 587 return ev_time ();
125} 588}
126 589
127#define array_roundsize(base,n) ((n) | 4 & ~3) 590#if EV_MULTIPLICITY
591ev_tstamp
592ev_now (EV_P)
593{
594 return ev_rt_now;
595}
596#endif
128 597
129#define array_needsize(base,cur,cnt,init) \ 598void
130 if ((cnt) > cur) \ 599ev_sleep (ev_tstamp delay)
131 { \ 600{
132 int newcnt = cur; \ 601 if (delay > 0.)
133 do \
134 { \
135 newcnt = array_roundsize (base, newcnt << 1); \
136 } \
137 while ((cnt) > newcnt); \
138 \
139 base = realloc (base, sizeof (*base) * (newcnt)); \
140 init (base + cur, newcnt - cur); \
141 cur = newcnt; \
142 } 602 {
603#if EV_USE_NANOSLEEP
604 struct timespec ts;
605
606 ts.tv_sec = (time_t)delay;
607 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
608
609 nanosleep (&ts, 0);
610#elif defined(_WIN32)
611 Sleep ((unsigned long)(delay * 1e3));
612#else
613 struct timeval tv;
614
615 tv.tv_sec = (time_t)delay;
616 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
617
618 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
619 /* somehting nto guaranteed by newer posix versions, but guaranteed */
620 /* by older ones */
621 select (0, 0, 0, 0, &tv);
622#endif
623 }
624}
143 625
144/*****************************************************************************/ 626/*****************************************************************************/
145 627
146typedef struct 628#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
147{
148 struct ev_io *head;
149 unsigned char events;
150 unsigned char reify;
151} ANFD;
152 629
153static ANFD *anfds; 630inline_size int
154static int anfdmax; 631array_nextsize (int elem, int cur, int cnt)
155
156static void
157anfds_init (ANFD *base, int count)
158{ 632{
159 while (count--) 633 int ncur = cur + 1;
160 {
161 base->head = 0;
162 base->events = EV_NONE;
163 base->reify = 0;
164 634
165 ++base; 635 do
636 ncur <<= 1;
637 while (cnt > ncur);
638
639 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
640 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
166 } 641 {
167} 642 ncur *= elem;
168 643 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
169typedef struct 644 ncur = ncur - sizeof (void *) * 4;
170{ 645 ncur /= elem;
171 W w;
172 int events;
173} ANPENDING;
174
175static ANPENDING *pendings;
176static int pendingmax, pendingcnt;
177
178static void
179event (W w, int events)
180{
181 if (w->pending)
182 { 646 }
647
648 return ncur;
649}
650
651static noinline void *
652array_realloc (int elem, void *base, int *cur, int cnt)
653{
654 *cur = array_nextsize (elem, *cur, cnt);
655 return ev_realloc (base, elem * *cur);
656}
657
658#define array_init_zero(base,count) \
659 memset ((void *)(base), 0, sizeof (*(base)) * (count))
660
661#define array_needsize(type,base,cur,cnt,init) \
662 if (expect_false ((cnt) > (cur))) \
663 { \
664 int ocur_ = (cur); \
665 (base) = (type *)array_realloc \
666 (sizeof (type), (base), &(cur), (cnt)); \
667 init ((base) + (ocur_), (cur) - ocur_); \
668 }
669
670#if 0
671#define array_slim(type,stem) \
672 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
673 { \
674 stem ## max = array_roundsize (stem ## cnt >> 1); \
675 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
676 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
677 }
678#endif
679
680#define array_free(stem, idx) \
681 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
682
683/*****************************************************************************/
684
685void noinline
686ev_feed_event (EV_P_ void *w, int revents)
687{
688 W w_ = (W)w;
689 int pri = ABSPRI (w_);
690
691 if (expect_false (w_->pending))
692 pendings [pri][w_->pending - 1].events |= revents;
693 else
694 {
695 w_->pending = ++pendingcnt [pri];
696 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
697 pendings [pri][w_->pending - 1].w = w_;
183 pendings [w->pending - 1].events |= events; 698 pendings [pri][w_->pending - 1].events = revents;
184 return;
185 } 699 }
186
187 w->pending = ++pendingcnt;
188 array_needsize (pendings, pendingmax, pendingcnt, );
189 pendings [pendingcnt - 1].w = w;
190 pendings [pendingcnt - 1].events = events;
191} 700}
192 701
193static void 702inline_speed void
703feed_reverse (EV_P_ W w)
704{
705 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
706 rfeeds [rfeedcnt++] = w;
707}
708
709inline_size void
710feed_reverse_done (EV_P_ int revents)
711{
712 do
713 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
714 while (rfeedcnt);
715}
716
717inline_speed void
194queue_events (W *events, int eventcnt, int type) 718queue_events (EV_P_ W *events, int eventcnt, int type)
195{ 719{
196 int i; 720 int i;
197 721
198 for (i = 0; i < eventcnt; ++i) 722 for (i = 0; i < eventcnt; ++i)
199 event (events [i], type); 723 ev_feed_event (EV_A_ events [i], type);
200} 724}
201 725
202static void 726/*****************************************************************************/
727
728inline_speed void
203fd_event (int fd, int events) 729fd_event (EV_P_ int fd, int revents)
204{ 730{
205 ANFD *anfd = anfds + fd; 731 ANFD *anfd = anfds + fd;
206 struct ev_io *w; 732 ev_io *w;
207 733
208 for (w = anfd->head; w; w = w->next) 734 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
209 { 735 {
210 int ev = w->events & events; 736 int ev = w->events & revents;
211 737
212 if (ev) 738 if (ev)
213 event ((W)w, ev); 739 ev_feed_event (EV_A_ (W)w, ev);
214 } 740 }
215} 741}
216 742
217/*****************************************************************************/ 743void
744ev_feed_fd_event (EV_P_ int fd, int revents)
745{
746 if (fd >= 0 && fd < anfdmax)
747 fd_event (EV_A_ fd, revents);
748}
218 749
219static int *fdchanges; 750inline_size void
220static int fdchangemax, fdchangecnt; 751fd_reify (EV_P)
221
222static void
223fd_reify (void)
224{ 752{
225 int i; 753 int i;
226 754
227 for (i = 0; i < fdchangecnt; ++i) 755 for (i = 0; i < fdchangecnt; ++i)
228 { 756 {
229 int fd = fdchanges [i]; 757 int fd = fdchanges [i];
230 ANFD *anfd = anfds + fd; 758 ANFD *anfd = anfds + fd;
231 struct ev_io *w; 759 ev_io *w;
232 760
233 int events = 0; 761 unsigned char events = 0;
234 762
235 for (w = anfd->head; w; w = w->next) 763 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
236 events |= w->events; 764 events |= (unsigned char)w->events;
237 765
238 anfd->reify = 0; 766#if EV_SELECT_IS_WINSOCKET
239 767 if (events)
240 if (anfd->events != events)
241 { 768 {
242 method_modify (fd, anfd->events, events); 769 unsigned long arg;
243 anfd->events = events; 770 #ifdef EV_FD_TO_WIN32_HANDLE
771 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
772 #else
773 anfd->handle = _get_osfhandle (fd);
774 #endif
775 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
244 } 776 }
777#endif
778
779 {
780 unsigned char o_events = anfd->events;
781 unsigned char o_reify = anfd->reify;
782
783 anfd->reify = 0;
784 anfd->events = events;
785
786 if (o_events != events || o_reify & EV__IOFDSET)
787 backend_modify (EV_A_ fd, o_events, events);
788 }
245 } 789 }
246 790
247 fdchangecnt = 0; 791 fdchangecnt = 0;
248} 792}
249 793
250static void 794inline_size void
251fd_change (int fd) 795fd_change (EV_P_ int fd, int flags)
252{ 796{
253 if (anfds [fd].reify || fdchangecnt < 0) 797 unsigned char reify = anfds [fd].reify;
254 return;
255
256 anfds [fd].reify = 1; 798 anfds [fd].reify |= flags;
257 799
800 if (expect_true (!reify))
801 {
258 ++fdchangecnt; 802 ++fdchangecnt;
259 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 803 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
260 fdchanges [fdchangecnt - 1] = fd; 804 fdchanges [fdchangecnt - 1] = fd;
805 }
806}
807
808inline_speed void
809fd_kill (EV_P_ int fd)
810{
811 ev_io *w;
812
813 while ((w = (ev_io *)anfds [fd].head))
814 {
815 ev_io_stop (EV_A_ w);
816 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
817 }
818}
819
820inline_size int
821fd_valid (int fd)
822{
823#ifdef _WIN32
824 return _get_osfhandle (fd) != -1;
825#else
826 return fcntl (fd, F_GETFD) != -1;
827#endif
261} 828}
262 829
263/* called on EBADF to verify fds */ 830/* called on EBADF to verify fds */
264static void 831static void noinline
265fd_recheck (void) 832fd_ebadf (EV_P)
266{ 833{
267 int fd; 834 int fd;
268 835
269 for (fd = 0; fd < anfdmax; ++fd) 836 for (fd = 0; fd < anfdmax; ++fd)
270 if (anfds [fd].events) 837 if (anfds [fd].events)
271 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 838 if (!fd_valid (fd) && errno == EBADF)
272 while (anfds [fd].head) 839 fd_kill (EV_A_ fd);
840}
841
842/* called on ENOMEM in select/poll to kill some fds and retry */
843static void noinline
844fd_enomem (EV_P)
845{
846 int fd;
847
848 for (fd = anfdmax; fd--; )
849 if (anfds [fd].events)
273 { 850 {
274 ev_io_stop (anfds [fd].head); 851 fd_kill (EV_A_ fd);
275 event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE); 852 return;
276 } 853 }
854}
855
856/* usually called after fork if backend needs to re-arm all fds from scratch */
857static void noinline
858fd_rearm_all (EV_P)
859{
860 int fd;
861
862 for (fd = 0; fd < anfdmax; ++fd)
863 if (anfds [fd].events)
864 {
865 anfds [fd].events = 0;
866 anfds [fd].emask = 0;
867 fd_change (EV_A_ fd, EV__IOFDSET | 1);
868 }
277} 869}
278 870
279/*****************************************************************************/ 871/*****************************************************************************/
280 872
281static struct ev_timer **timers; 873/*
282static int timermax, timercnt; 874 * the heap functions want a real array index. array index 0 uis guaranteed to not
875 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
876 * the branching factor of the d-tree.
877 */
283 878
284static struct ev_periodic **periodics; 879/*
285static int periodicmax, periodiccnt; 880 * at the moment we allow libev the luxury of two heaps,
881 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
882 * which is more cache-efficient.
883 * the difference is about 5% with 50000+ watchers.
884 */
885#if EV_USE_4HEAP
286 886
287static void 887#define DHEAP 4
288upheap (WT *timers, int k) 888#define HEAP0 (DHEAP - 1) /* index of first element in heap */
289{ 889#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
290 WT w = timers [k]; 890#define UPHEAP_DONE(p,k) ((p) == (k))
291 891
292 while (k && timers [k >> 1]->at > w->at) 892/* away from the root */
293 { 893inline_speed void
294 timers [k] = timers [k >> 1];
295 timers [k]->active = k + 1;
296 k >>= 1;
297 }
298
299 timers [k] = w;
300 timers [k]->active = k + 1;
301
302}
303
304static void
305downheap (WT *timers, int N, int k) 894downheap (ANHE *heap, int N, int k)
306{ 895{
307 WT w = timers [k]; 896 ANHE he = heap [k];
897 ANHE *E = heap + N + HEAP0;
308 898
309 while (k < (N >> 1)) 899 for (;;)
310 { 900 {
311 int j = k << 1; 901 ev_tstamp minat;
902 ANHE *minpos;
903 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
312 904
313 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 905 /* find minimum child */
906 if (expect_true (pos + DHEAP - 1 < E))
314 ++j; 907 {
315 908 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
316 if (w->at <= timers [j]->at) 909 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
910 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
911 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
912 }
913 else if (pos < E)
914 {
915 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
916 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
917 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
918 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
919 }
920 else
317 break; 921 break;
318 922
319 timers [k] = timers [j]; 923 if (ANHE_at (he) <= minat)
320 timers [k]->active = k + 1; 924 break;
925
926 heap [k] = *minpos;
927 ev_active (ANHE_w (*minpos)) = k;
928
929 k = minpos - heap;
930 }
931
932 heap [k] = he;
933 ev_active (ANHE_w (he)) = k;
934}
935
936#else /* 4HEAP */
937
938#define HEAP0 1
939#define HPARENT(k) ((k) >> 1)
940#define UPHEAP_DONE(p,k) (!(p))
941
942/* away from the root */
943inline_speed void
944downheap (ANHE *heap, int N, int k)
945{
946 ANHE he = heap [k];
947
948 for (;;)
949 {
950 int c = k << 1;
951
952 if (c > N + HEAP0 - 1)
953 break;
954
955 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
956 ? 1 : 0;
957
958 if (ANHE_at (he) <= ANHE_at (heap [c]))
959 break;
960
961 heap [k] = heap [c];
962 ev_active (ANHE_w (heap [k])) = k;
963
321 k = j; 964 k = c;
965 }
966
967 heap [k] = he;
968 ev_active (ANHE_w (he)) = k;
969}
970#endif
971
972/* towards the root */
973inline_speed void
974upheap (ANHE *heap, int k)
975{
976 ANHE he = heap [k];
977
978 for (;;)
322 } 979 {
980 int p = HPARENT (k);
323 981
324 timers [k] = w; 982 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
325 timers [k]->active = k + 1; 983 break;
984
985 heap [k] = heap [p];
986 ev_active (ANHE_w (heap [k])) = k;
987 k = p;
988 }
989
990 heap [k] = he;
991 ev_active (ANHE_w (he)) = k;
992}
993
994inline_size void
995adjustheap (ANHE *heap, int N, int k)
996{
997 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
998 upheap (heap, k);
999 else
1000 downheap (heap, N, k);
1001}
1002
1003/* rebuild the heap: this function is used only once and executed rarely */
1004inline_size void
1005reheap (ANHE *heap, int N)
1006{
1007 int i;
1008
1009 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1010 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1011 for (i = 0; i < N; ++i)
1012 upheap (heap, i + HEAP0);
326} 1013}
327 1014
328/*****************************************************************************/ 1015/*****************************************************************************/
329 1016
330typedef struct 1017typedef struct
331{ 1018{
332 struct ev_signal *head; 1019 WL head;
333 sig_atomic_t volatile gotsig; 1020 EV_ATOMIC_T gotsig;
334} ANSIG; 1021} ANSIG;
335 1022
336static ANSIG *signals; 1023static ANSIG *signals;
337static int signalmax; 1024static int signalmax;
338 1025
339static int sigpipe [2]; 1026static EV_ATOMIC_T gotsig;
340static sig_atomic_t volatile gotsig; 1027
341static struct ev_io sigev; 1028/*****************************************************************************/
1029
1030inline_speed void
1031fd_intern (int fd)
1032{
1033#ifdef _WIN32
1034 unsigned long arg = 1;
1035 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1036#else
1037 fcntl (fd, F_SETFD, FD_CLOEXEC);
1038 fcntl (fd, F_SETFL, O_NONBLOCK);
1039#endif
1040}
1041
1042static void noinline
1043evpipe_init (EV_P)
1044{
1045 if (!ev_is_active (&pipeev))
1046 {
1047#if EV_USE_EVENTFD
1048 if ((evfd = eventfd (0, 0)) >= 0)
1049 {
1050 evpipe [0] = -1;
1051 fd_intern (evfd);
1052 ev_io_set (&pipeev, evfd, EV_READ);
1053 }
1054 else
1055#endif
1056 {
1057 while (pipe (evpipe))
1058 ev_syserr ("(libev) error creating signal/async pipe");
1059
1060 fd_intern (evpipe [0]);
1061 fd_intern (evpipe [1]);
1062 ev_io_set (&pipeev, evpipe [0], EV_READ);
1063 }
1064
1065 ev_io_start (EV_A_ &pipeev);
1066 ev_unref (EV_A); /* watcher should not keep loop alive */
1067 }
1068}
1069
1070inline_size void
1071evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1072{
1073 if (!*flag)
1074 {
1075 int old_errno = errno; /* save errno because write might clobber it */
1076
1077 *flag = 1;
1078
1079#if EV_USE_EVENTFD
1080 if (evfd >= 0)
1081 {
1082 uint64_t counter = 1;
1083 write (evfd, &counter, sizeof (uint64_t));
1084 }
1085 else
1086#endif
1087 write (evpipe [1], &old_errno, 1);
1088
1089 errno = old_errno;
1090 }
1091}
342 1092
343static void 1093static void
344signals_init (ANSIG *base, int count) 1094pipecb (EV_P_ ev_io *iow, int revents)
345{ 1095{
346 while (count--) 1096#if EV_USE_EVENTFD
1097 if (evfd >= 0)
1098 {
1099 uint64_t counter;
1100 read (evfd, &counter, sizeof (uint64_t));
347 { 1101 }
348 base->head = 0; 1102 else
1103#endif
1104 {
1105 char dummy;
1106 read (evpipe [0], &dummy, 1);
1107 }
1108
1109 if (gotsig && ev_is_default_loop (EV_A))
1110 {
1111 int signum;
349 base->gotsig = 0; 1112 gotsig = 0;
350 1113
351 ++base; 1114 for (signum = signalmax; signum--; )
1115 if (signals [signum].gotsig)
1116 ev_feed_signal_event (EV_A_ signum + 1);
1117 }
1118
1119#if EV_ASYNC_ENABLE
1120 if (gotasync)
352 } 1121 {
1122 int i;
1123 gotasync = 0;
1124
1125 for (i = asynccnt; i--; )
1126 if (asyncs [i]->sent)
1127 {
1128 asyncs [i]->sent = 0;
1129 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1130 }
1131 }
1132#endif
353} 1133}
1134
1135/*****************************************************************************/
354 1136
355static void 1137static void
356sighandler (int signum) 1138ev_sighandler (int signum)
357{ 1139{
1140#if EV_MULTIPLICITY
1141 struct ev_loop *loop = &default_loop_struct;
1142#endif
1143
1144#if _WIN32
1145 signal (signum, ev_sighandler);
1146#endif
1147
358 signals [signum - 1].gotsig = 1; 1148 signals [signum - 1].gotsig = 1;
359 1149 evpipe_write (EV_A_ &gotsig);
360 if (!gotsig)
361 {
362 gotsig = 1;
363 write (sigpipe [1], &signum, 1);
364 }
365} 1150}
366 1151
367static void 1152void noinline
368sigcb (struct ev_io *iow, int revents) 1153ev_feed_signal_event (EV_P_ int signum)
369{ 1154{
370 struct ev_signal *w; 1155 WL w;
1156
1157#if EV_MULTIPLICITY
1158 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1159#endif
1160
371 int signum; 1161 --signum;
372 1162
373 read (sigpipe [0], &revents, 1); 1163 if (signum < 0 || signum >= signalmax)
374 gotsig = 0; 1164 return;
375 1165
376 for (signum = signalmax; signum--; )
377 if (signals [signum].gotsig)
378 {
379 signals [signum].gotsig = 0; 1166 signals [signum].gotsig = 0;
380 1167
381 for (w = signals [signum].head; w; w = w->next) 1168 for (w = signals [signum].head; w; w = w->next)
382 event ((W)w, EV_SIGNAL); 1169 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
383 }
384}
385
386static void
387siginit (void)
388{
389 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
390 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
391
392 /* rather than sort out wether we really need nb, set it */
393 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
394 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
395
396 ev_io_set (&sigev, sigpipe [0], EV_READ);
397 ev_io_start (&sigev);
398} 1170}
399 1171
400/*****************************************************************************/ 1172/*****************************************************************************/
401 1173
402static struct ev_idle **idles; 1174static WL childs [EV_PID_HASHSIZE];
403static int idlemax, idlecnt;
404 1175
405static struct ev_prepare **prepares; 1176#ifndef _WIN32
406static int preparemax, preparecnt;
407 1177
408static struct ev_check **checks;
409static int checkmax, checkcnt;
410
411/*****************************************************************************/
412
413static struct ev_child *childs [PID_HASHSIZE];
414static struct ev_signal childev; 1178static ev_signal childev;
1179
1180#ifndef WIFCONTINUED
1181# define WIFCONTINUED(status) 0
1182#endif
1183
1184inline_speed void
1185child_reap (EV_P_ int chain, int pid, int status)
1186{
1187 ev_child *w;
1188 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1189
1190 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1191 {
1192 if ((w->pid == pid || !w->pid)
1193 && (!traced || (w->flags & 1)))
1194 {
1195 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1196 w->rpid = pid;
1197 w->rstatus = status;
1198 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1199 }
1200 }
1201}
415 1202
416#ifndef WCONTINUED 1203#ifndef WCONTINUED
417# define WCONTINUED 0 1204# define WCONTINUED 0
418#endif 1205#endif
419 1206
420static void 1207static void
421childcb (struct ev_signal *sw, int revents) 1208childcb (EV_P_ ev_signal *sw, int revents)
422{ 1209{
423 struct ev_child *w;
424 int pid, status; 1210 int pid, status;
425 1211
1212 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
426 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1213 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
427 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1214 if (!WCONTINUED
428 if (w->pid == pid || w->pid == -1) 1215 || errno != EINVAL
429 { 1216 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
430 w->status = status; 1217 return;
431 event ((W)w, EV_CHILD); 1218
432 } 1219 /* make sure we are called again until all children have been reaped */
1220 /* we need to do it this way so that the callback gets called before we continue */
1221 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1222
1223 child_reap (EV_A_ pid, pid, status);
1224 if (EV_PID_HASHSIZE > 1)
1225 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
433} 1226}
1227
1228#endif
434 1229
435/*****************************************************************************/ 1230/*****************************************************************************/
436 1231
1232#if EV_USE_PORT
1233# include "ev_port.c"
1234#endif
1235#if EV_USE_KQUEUE
1236# include "ev_kqueue.c"
1237#endif
437#if EV_USE_EPOLL 1238#if EV_USE_EPOLL
438# include "ev_epoll.c" 1239# include "ev_epoll.c"
439#endif 1240#endif
1241#if EV_USE_POLL
1242# include "ev_poll.c"
1243#endif
440#if EV_USE_SELECT 1244#if EV_USE_SELECT
441# include "ev_select.c" 1245# include "ev_select.c"
442#endif 1246#endif
443 1247
444int 1248int
… …
451ev_version_minor (void) 1255ev_version_minor (void)
452{ 1256{
453 return EV_VERSION_MINOR; 1257 return EV_VERSION_MINOR;
454} 1258}
455 1259
456int ev_init (int flags) 1260/* return true if we are running with elevated privileges and should ignore env variables */
1261int inline_size
1262enable_secure (void)
457{ 1263{
458 if (!ev_method) 1264#ifdef _WIN32
1265 return 0;
1266#else
1267 return getuid () != geteuid ()
1268 || getgid () != getegid ();
1269#endif
1270}
1271
1272unsigned int
1273ev_supported_backends (void)
1274{
1275 unsigned int flags = 0;
1276
1277 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1278 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1279 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1280 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1281 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1282
1283 return flags;
1284}
1285
1286unsigned int
1287ev_recommended_backends (void)
1288{
1289 unsigned int flags = ev_supported_backends ();
1290
1291#ifndef __NetBSD__
1292 /* kqueue is borked on everything but netbsd apparently */
1293 /* it usually doesn't work correctly on anything but sockets and pipes */
1294 flags &= ~EVBACKEND_KQUEUE;
1295#endif
1296#ifdef __APPLE__
1297 /* only select works correctly on that "unix-certified" platform */
1298 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1299 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1300#endif
1301
1302 return flags;
1303}
1304
1305unsigned int
1306ev_embeddable_backends (void)
1307{
1308 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1309
1310 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1311 /* please fix it and tell me how to detect the fix */
1312 flags &= ~EVBACKEND_EPOLL;
1313
1314 return flags;
1315}
1316
1317unsigned int
1318ev_backend (EV_P)
1319{
1320 return backend;
1321}
1322
1323unsigned int
1324ev_loop_count (EV_P)
1325{
1326 return loop_count;
1327}
1328
1329void
1330ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1331{
1332 io_blocktime = interval;
1333}
1334
1335void
1336ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1337{
1338 timeout_blocktime = interval;
1339}
1340
1341static void noinline
1342loop_init (EV_P_ unsigned int flags)
1343{
1344 if (!backend)
459 { 1345 {
1346#if EV_USE_REALTIME
1347 if (!have_realtime)
1348 {
1349 struct timespec ts;
1350
1351 if (!clock_gettime (CLOCK_REALTIME, &ts))
1352 have_realtime = 1;
1353 }
1354#endif
1355
460#if EV_USE_MONOTONIC 1356#if EV_USE_MONOTONIC
1357 if (!have_monotonic)
1358 {
1359 struct timespec ts;
1360
1361 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1362 have_monotonic = 1;
1363 }
1364#endif
1365
1366 ev_rt_now = ev_time ();
1367 mn_now = get_clock ();
1368 now_floor = mn_now;
1369 rtmn_diff = ev_rt_now - mn_now;
1370
1371 io_blocktime = 0.;
1372 timeout_blocktime = 0.;
1373 backend = 0;
1374 backend_fd = -1;
1375 gotasync = 0;
1376#if EV_USE_INOTIFY
1377 fs_fd = -2;
1378#endif
1379
1380 /* pid check not overridable via env */
1381#ifndef _WIN32
1382 if (flags & EVFLAG_FORKCHECK)
1383 curpid = getpid ();
1384#endif
1385
1386 if (!(flags & EVFLAG_NOENV)
1387 && !enable_secure ()
1388 && getenv ("LIBEV_FLAGS"))
1389 flags = atoi (getenv ("LIBEV_FLAGS"));
1390
1391 if (!(flags & 0x0000ffffU))
1392 flags |= ev_recommended_backends ();
1393
1394#if EV_USE_PORT
1395 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1396#endif
1397#if EV_USE_KQUEUE
1398 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1399#endif
1400#if EV_USE_EPOLL
1401 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1402#endif
1403#if EV_USE_POLL
1404 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1405#endif
1406#if EV_USE_SELECT
1407 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1408#endif
1409
1410 ev_init (&pipeev, pipecb);
1411 ev_set_priority (&pipeev, EV_MAXPRI);
1412 }
1413}
1414
1415static void noinline
1416loop_destroy (EV_P)
1417{
1418 int i;
1419
1420 if (ev_is_active (&pipeev))
1421 {
1422 ev_ref (EV_A); /* signal watcher */
1423 ev_io_stop (EV_A_ &pipeev);
1424
1425#if EV_USE_EVENTFD
1426 if (evfd >= 0)
1427 close (evfd);
1428#endif
1429
1430 if (evpipe [0] >= 0)
1431 {
1432 close (evpipe [0]);
1433 close (evpipe [1]);
1434 }
1435 }
1436
1437#if EV_USE_INOTIFY
1438 if (fs_fd >= 0)
1439 close (fs_fd);
1440#endif
1441
1442 if (backend_fd >= 0)
1443 close (backend_fd);
1444
1445#if EV_USE_PORT
1446 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1447#endif
1448#if EV_USE_KQUEUE
1449 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1450#endif
1451#if EV_USE_EPOLL
1452 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1453#endif
1454#if EV_USE_POLL
1455 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1456#endif
1457#if EV_USE_SELECT
1458 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1459#endif
1460
1461 for (i = NUMPRI; i--; )
1462 {
1463 array_free (pending, [i]);
1464#if EV_IDLE_ENABLE
1465 array_free (idle, [i]);
1466#endif
1467 }
1468
1469 ev_free (anfds); anfdmax = 0;
1470
1471 /* have to use the microsoft-never-gets-it-right macro */
1472 array_free (rfeed, EMPTY);
1473 array_free (fdchange, EMPTY);
1474 array_free (timer, EMPTY);
1475#if EV_PERIODIC_ENABLE
1476 array_free (periodic, EMPTY);
1477#endif
1478#if EV_FORK_ENABLE
1479 array_free (fork, EMPTY);
1480#endif
1481 array_free (prepare, EMPTY);
1482 array_free (check, EMPTY);
1483#if EV_ASYNC_ENABLE
1484 array_free (async, EMPTY);
1485#endif
1486
1487 backend = 0;
1488}
1489
1490#if EV_USE_INOTIFY
1491inline_size void infy_fork (EV_P);
1492#endif
1493
1494inline_size void
1495loop_fork (EV_P)
1496{
1497#if EV_USE_PORT
1498 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1499#endif
1500#if EV_USE_KQUEUE
1501 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1502#endif
1503#if EV_USE_EPOLL
1504 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1505#endif
1506#if EV_USE_INOTIFY
1507 infy_fork (EV_A);
1508#endif
1509
1510 if (ev_is_active (&pipeev))
1511 {
1512 /* this "locks" the handlers against writing to the pipe */
1513 /* while we modify the fd vars */
1514 gotsig = 1;
1515#if EV_ASYNC_ENABLE
1516 gotasync = 1;
1517#endif
1518
1519 ev_ref (EV_A);
1520 ev_io_stop (EV_A_ &pipeev);
1521
1522#if EV_USE_EVENTFD
1523 if (evfd >= 0)
1524 close (evfd);
1525#endif
1526
1527 if (evpipe [0] >= 0)
1528 {
1529 close (evpipe [0]);
1530 close (evpipe [1]);
1531 }
1532
1533 evpipe_init (EV_A);
1534 /* now iterate over everything, in case we missed something */
1535 pipecb (EV_A_ &pipeev, EV_READ);
1536 }
1537
1538 postfork = 0;
1539}
1540
1541#if EV_MULTIPLICITY
1542
1543struct ev_loop *
1544ev_loop_new (unsigned int flags)
1545{
1546 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1547
1548 memset (loop, 0, sizeof (struct ev_loop));
1549
1550 loop_init (EV_A_ flags);
1551
1552 if (ev_backend (EV_A))
1553 return loop;
1554
1555 return 0;
1556}
1557
1558void
1559ev_loop_destroy (EV_P)
1560{
1561 loop_destroy (EV_A);
1562 ev_free (loop);
1563}
1564
1565void
1566ev_loop_fork (EV_P)
1567{
1568 postfork = 1; /* must be in line with ev_default_fork */
1569}
1570
1571#if EV_VERIFY
1572static void noinline
1573verify_watcher (EV_P_ W w)
1574{
1575 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1576
1577 if (w->pending)
1578 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1579}
1580
1581static void noinline
1582verify_heap (EV_P_ ANHE *heap, int N)
1583{
1584 int i;
1585
1586 for (i = HEAP0; i < N + HEAP0; ++i)
1587 {
1588 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1589 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1590 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1591
1592 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1593 }
1594}
1595
1596static void noinline
1597array_verify (EV_P_ W *ws, int cnt)
1598{
1599 while (cnt--)
1600 {
1601 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1602 verify_watcher (EV_A_ ws [cnt]);
1603 }
1604}
1605#endif
1606
1607void
1608ev_loop_verify (EV_P)
1609{
1610#if EV_VERIFY
1611 int i;
1612 WL w;
1613
1614 assert (activecnt >= -1);
1615
1616 assert (fdchangemax >= fdchangecnt);
1617 for (i = 0; i < fdchangecnt; ++i)
1618 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1619
1620 assert (anfdmax >= 0);
1621 for (i = 0; i < anfdmax; ++i)
1622 for (w = anfds [i].head; w; w = w->next)
461 { 1623 {
462 struct timespec ts; 1624 verify_watcher (EV_A_ (W)w);
463 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1625 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
464 have_monotonic = 1; 1626 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
465 } 1627 }
1628
1629 assert (timermax >= timercnt);
1630 verify_heap (EV_A_ timers, timercnt);
1631
1632#if EV_PERIODIC_ENABLE
1633 assert (periodicmax >= periodiccnt);
1634 verify_heap (EV_A_ periodics, periodiccnt);
1635#endif
1636
1637 for (i = NUMPRI; i--; )
1638 {
1639 assert (pendingmax [i] >= pendingcnt [i]);
1640#if EV_IDLE_ENABLE
1641 assert (idleall >= 0);
1642 assert (idlemax [i] >= idlecnt [i]);
1643 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1644#endif
1645 }
1646
1647#if EV_FORK_ENABLE
1648 assert (forkmax >= forkcnt);
1649 array_verify (EV_A_ (W *)forks, forkcnt);
1650#endif
1651
1652#if EV_ASYNC_ENABLE
1653 assert (asyncmax >= asynccnt);
1654 array_verify (EV_A_ (W *)asyncs, asynccnt);
1655#endif
1656
1657 assert (preparemax >= preparecnt);
1658 array_verify (EV_A_ (W *)prepares, preparecnt);
1659
1660 assert (checkmax >= checkcnt);
1661 array_verify (EV_A_ (W *)checks, checkcnt);
1662
1663# if 0
1664 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1665 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
466#endif 1666# endif
467
468 ev_now = ev_time ();
469 now = get_clock ();
470 diff = ev_now - now;
471
472 if (pipe (sigpipe))
473 return 0;
474
475 ev_method = EVMETHOD_NONE;
476#if EV_USE_EPOLL
477 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
478#endif 1667#endif
479#if EV_USE_SELECT 1668}
480 if (ev_method == EVMETHOD_NONE) select_init (flags);
481#endif
482 1669
483 if (ev_method) 1670#endif /* multiplicity */
1671
1672#if EV_MULTIPLICITY
1673struct ev_loop *
1674ev_default_loop_init (unsigned int flags)
1675#else
1676int
1677ev_default_loop (unsigned int flags)
1678#endif
1679{
1680 if (!ev_default_loop_ptr)
1681 {
1682#if EV_MULTIPLICITY
1683 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1684#else
1685 ev_default_loop_ptr = 1;
1686#endif
1687
1688 loop_init (EV_A_ flags);
1689
1690 if (ev_backend (EV_A))
484 { 1691 {
485 ev_watcher_init (&sigev, sigcb); 1692#ifndef _WIN32
486 siginit ();
487
488 ev_signal_init (&childev, childcb, SIGCHLD); 1693 ev_signal_init (&childev, childcb, SIGCHLD);
1694 ev_set_priority (&childev, EV_MAXPRI);
489 ev_signal_start (&childev); 1695 ev_signal_start (EV_A_ &childev);
490 } 1696 ev_unref (EV_A); /* child watcher should not keep loop alive */
491 }
492
493 return ev_method;
494}
495
496/*****************************************************************************/
497
498void
499ev_fork_prepare (void)
500{
501 /* nop */
502}
503
504void
505ev_fork_parent (void)
506{
507 /* nop */
508}
509
510void
511ev_fork_child (void)
512{
513#if EV_USE_EPOLL
514 if (ev_method == EVMETHOD_EPOLL)
515 epoll_postfork_child ();
516#endif 1697#endif
517
518 ev_io_stop (&sigev);
519 close (sigpipe [0]);
520 close (sigpipe [1]);
521 pipe (sigpipe);
522 siginit ();
523}
524
525/*****************************************************************************/
526
527static void
528call_pending (void)
529{
530 while (pendingcnt)
531 {
532 ANPENDING *p = pendings + --pendingcnt;
533
534 if (p->w)
535 {
536 p->w->pending = 0;
537 p->w->cb (p->w, p->events);
538 }
539 }
540}
541
542static void
543timers_reify (void)
544{
545 while (timercnt && timers [0]->at <= now)
546 {
547 struct ev_timer *w = timers [0];
548
549 /* first reschedule or stop timer */
550 if (w->repeat)
551 {
552 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
553 w->at = now + w->repeat;
554 downheap ((WT *)timers, timercnt, 0);
555 } 1698 }
556 else 1699 else
557 ev_timer_stop (w); /* nonrepeating: stop timer */ 1700 ev_default_loop_ptr = 0;
558
559 event ((W)w, EV_TIMEOUT);
560 } 1701 }
561}
562 1702
563static void 1703 return ev_default_loop_ptr;
564periodics_reify (void) 1704}
1705
1706void
1707ev_default_destroy (void)
565{ 1708{
566 while (periodiccnt && periodics [0]->at <= ev_now) 1709#if EV_MULTIPLICITY
1710 struct ev_loop *loop = ev_default_loop_ptr;
1711#endif
1712
1713 ev_default_loop_ptr = 0;
1714
1715#ifndef _WIN32
1716 ev_ref (EV_A); /* child watcher */
1717 ev_signal_stop (EV_A_ &childev);
1718#endif
1719
1720 loop_destroy (EV_A);
1721}
1722
1723void
1724ev_default_fork (void)
1725{
1726#if EV_MULTIPLICITY
1727 struct ev_loop *loop = ev_default_loop_ptr;
1728#endif
1729
1730 postfork = 1; /* must be in line with ev_loop_fork */
1731}
1732
1733/*****************************************************************************/
1734
1735void
1736ev_invoke (EV_P_ void *w, int revents)
1737{
1738 EV_CB_INVOKE ((W)w, revents);
1739}
1740
1741inline_speed void
1742call_pending (EV_P)
1743{
1744 int pri;
1745
1746 for (pri = NUMPRI; pri--; )
1747 while (pendingcnt [pri])
567 { 1748 {
568 struct ev_periodic *w = periodics [0]; 1749 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
569 1750
570 /* first reschedule or stop timer */ 1751 if (expect_true (p->w))
571 if (w->interval) 1752 {
1753 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1754
1755 p->w->pending = 0;
1756 EV_CB_INVOKE (p->w, p->events);
1757 EV_FREQUENT_CHECK;
1758 }
1759 }
1760}
1761
1762#if EV_IDLE_ENABLE
1763inline_size void
1764idle_reify (EV_P)
1765{
1766 if (expect_false (idleall))
1767 {
1768 int pri;
1769
1770 for (pri = NUMPRI; pri--; )
572 { 1771 {
573 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1772 if (pendingcnt [pri])
574 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); 1773 break;
575 downheap ((WT *)periodics, periodiccnt, 0);
576 }
577 else
578 ev_periodic_stop (w); /* nonrepeating: stop timer */
579 1774
580 event ((W)w, EV_PERIODIC); 1775 if (idlecnt [pri])
581 }
582}
583
584static void
585periodics_reschedule (ev_tstamp diff)
586{
587 int i;
588
589 /* adjust periodics after time jump */
590 for (i = 0; i < periodiccnt; ++i)
591 {
592 struct ev_periodic *w = periodics [i];
593
594 if (w->interval)
595 {
596 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
597
598 if (fabs (diff) >= 1e-4)
599 { 1776 {
600 ev_periodic_stop (w); 1777 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
601 ev_periodic_start (w); 1778 break;
602
603 i = 0; /* restart loop, inefficient, but time jumps should be rare */
604 } 1779 }
605 } 1780 }
606 } 1781 }
607} 1782}
1783#endif
608 1784
609static void 1785inline_size void
610time_update (void) 1786timers_reify (EV_P)
1787{
1788 EV_FREQUENT_CHECK;
1789
1790 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1791 {
1792 do
1793 {
1794 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1795
1796 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
1797
1798 /* first reschedule or stop timer */
1799 if (w->repeat)
1800 {
1801 ev_at (w) += w->repeat;
1802 if (ev_at (w) < mn_now)
1803 ev_at (w) = mn_now;
1804
1805 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1806
1807 ANHE_at_cache (timers [HEAP0]);
1808 downheap (timers, timercnt, HEAP0);
1809 }
1810 else
1811 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1812
1813 EV_FREQUENT_CHECK;
1814 feed_reverse (EV_A_ (W)w);
1815 }
1816 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1817
1818 feed_reverse_done (EV_A_ EV_TIMEOUT);
1819 }
1820}
1821
1822#if EV_PERIODIC_ENABLE
1823inline_size void
1824periodics_reify (EV_P)
1825{
1826 EV_FREQUENT_CHECK;
1827
1828 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1829 {
1830 int feed_count = 0;
1831
1832 do
1833 {
1834 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1835
1836 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1837
1838 /* first reschedule or stop timer */
1839 if (w->reschedule_cb)
1840 {
1841 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1842
1843 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1844
1845 ANHE_at_cache (periodics [HEAP0]);
1846 downheap (periodics, periodiccnt, HEAP0);
1847 }
1848 else if (w->interval)
1849 {
1850 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1851 /* if next trigger time is not sufficiently in the future, put it there */
1852 /* this might happen because of floating point inexactness */
1853 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1854 {
1855 ev_at (w) += w->interval;
1856
1857 /* if interval is unreasonably low we might still have a time in the past */
1858 /* so correct this. this will make the periodic very inexact, but the user */
1859 /* has effectively asked to get triggered more often than possible */
1860 if (ev_at (w) < ev_rt_now)
1861 ev_at (w) = ev_rt_now;
1862 }
1863
1864 ANHE_at_cache (periodics [HEAP0]);
1865 downheap (periodics, periodiccnt, HEAP0);
1866 }
1867 else
1868 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1869
1870 EV_FREQUENT_CHECK;
1871 feed_reverse (EV_A_ (W)w);
1872 }
1873 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1874
1875 feed_reverse_done (EV_A_ EV_PERIODIC);
1876 }
1877}
1878
1879static void noinline
1880periodics_reschedule (EV_P)
611{ 1881{
612 int i; 1882 int i;
613 1883
614 ev_now = ev_time (); 1884 /* adjust periodics after time jump */
1885 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1886 {
1887 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
615 1888
616 if (have_monotonic) 1889 if (w->reschedule_cb)
1890 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1891 else if (w->interval)
1892 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1893
1894 ANHE_at_cache (periodics [i]);
617 { 1895 }
1896
1897 reheap (periodics, periodiccnt);
1898}
1899#endif
1900
1901static void noinline
1902timers_reschedule (EV_P_ ev_tstamp adjust)
1903{
1904 int i;
1905
1906 for (i = 0; i < timercnt; ++i)
1907 {
1908 ANHE *he = timers + i + HEAP0;
1909 ANHE_w (*he)->at += adjust;
1910 ANHE_at_cache (*he);
1911 }
1912}
1913
1914inline_speed void
1915time_update (EV_P_ ev_tstamp max_block)
1916{
1917 int i;
1918
1919#if EV_USE_MONOTONIC
1920 if (expect_true (have_monotonic))
1921 {
618 ev_tstamp odiff = diff; 1922 ev_tstamp odiff = rtmn_diff;
619 1923
620 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1924 mn_now = get_clock ();
1925
1926 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1927 /* interpolate in the meantime */
1928 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
621 { 1929 {
622 now = get_clock (); 1930 ev_rt_now = rtmn_diff + mn_now;
1931 return;
1932 }
1933
1934 now_floor = mn_now;
1935 ev_rt_now = ev_time ();
1936
1937 /* loop a few times, before making important decisions.
1938 * on the choice of "4": one iteration isn't enough,
1939 * in case we get preempted during the calls to
1940 * ev_time and get_clock. a second call is almost guaranteed
1941 * to succeed in that case, though. and looping a few more times
1942 * doesn't hurt either as we only do this on time-jumps or
1943 * in the unlikely event of having been preempted here.
1944 */
1945 for (i = 4; --i; )
1946 {
623 diff = ev_now - now; 1947 rtmn_diff = ev_rt_now - mn_now;
624 1948
625 if (fabs (odiff - diff) < MIN_TIMEJUMP) 1949 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
626 return; /* all is well */ 1950 return; /* all is well */
627 1951
628 ev_now = ev_time (); 1952 ev_rt_now = ev_time ();
1953 mn_now = get_clock ();
1954 now_floor = mn_now;
629 } 1955 }
630 1956
631 periodics_reschedule (diff - odiff);
632 /* no timer adjustment, as the monotonic clock doesn't jump */ 1957 /* no timer adjustment, as the monotonic clock doesn't jump */
1958 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1959# if EV_PERIODIC_ENABLE
1960 periodics_reschedule (EV_A);
1961# endif
633 } 1962 }
634 else 1963 else
1964#endif
635 { 1965 {
636 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 1966 ev_rt_now = ev_time ();
1967
1968 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
637 { 1969 {
638 periodics_reschedule (ev_now - now);
639
640 /* adjust timers. this is easy, as the offset is the same for all */ 1970 /* adjust timers. this is easy, as the offset is the same for all of them */
641 for (i = 0; i < timercnt; ++i) 1971 timers_reschedule (EV_A_ ev_rt_now - mn_now);
642 timers [i]->at += diff; 1972#if EV_PERIODIC_ENABLE
1973 periodics_reschedule (EV_A);
1974#endif
643 } 1975 }
644 1976
645 now = ev_now; 1977 mn_now = ev_rt_now;
646 } 1978 }
647} 1979}
648 1980
649int ev_loop_done; 1981static int loop_done;
650 1982
1983void
651void ev_loop (int flags) 1984ev_loop (EV_P_ int flags)
652{ 1985{
653 double block; 1986 loop_done = EVUNLOOP_CANCEL;
654 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1987
1988 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
655 1989
656 do 1990 do
657 { 1991 {
1992#if EV_VERIFY >= 2
1993 ev_loop_verify (EV_A);
1994#endif
1995
1996#ifndef _WIN32
1997 if (expect_false (curpid)) /* penalise the forking check even more */
1998 if (expect_false (getpid () != curpid))
1999 {
2000 curpid = getpid ();
2001 postfork = 1;
2002 }
2003#endif
2004
2005#if EV_FORK_ENABLE
2006 /* we might have forked, so queue fork handlers */
2007 if (expect_false (postfork))
2008 if (forkcnt)
2009 {
2010 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2011 call_pending (EV_A);
2012 }
2013#endif
2014
658 /* queue check watchers (and execute them) */ 2015 /* queue prepare watchers (and execute them) */
659 if (preparecnt) 2016 if (expect_false (preparecnt))
660 { 2017 {
661 queue_events ((W *)prepares, preparecnt, EV_PREPARE); 2018 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
662 call_pending (); 2019 call_pending (EV_A);
663 } 2020 }
664 2021
2022 /* we might have forked, so reify kernel state if necessary */
2023 if (expect_false (postfork))
2024 loop_fork (EV_A);
2025
665 /* update fd-related kernel structures */ 2026 /* update fd-related kernel structures */
666 fd_reify (); 2027 fd_reify (EV_A);
667 2028
668 /* calculate blocking time */ 2029 /* calculate blocking time */
2030 {
2031 ev_tstamp waittime = 0.;
2032 ev_tstamp sleeptime = 0.;
669 2033
670 /* we only need this for !monotonic clockor timers, but as we basically 2034 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
671 always have timers, we just calculate it always */
672 ev_now = ev_time ();
673
674 if (flags & EVLOOP_NONBLOCK || idlecnt)
675 block = 0.;
676 else
677 { 2035 {
678 block = MAX_BLOCKTIME; 2036 /* update time to cancel out callback processing overhead */
2037 time_update (EV_A_ 1e100);
679 2038
680 if (timercnt) 2039 if (timercnt)
681 { 2040 {
682 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 2041 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
683 if (block > to) block = to; 2042 if (waittime > to) waittime = to;
684 } 2043 }
685 2044
2045#if EV_PERIODIC_ENABLE
686 if (periodiccnt) 2046 if (periodiccnt)
687 { 2047 {
688 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 2048 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
689 if (block > to) block = to; 2049 if (waittime > to) waittime = to;
690 } 2050 }
2051#endif
691 2052
692 if (block < 0.) block = 0.; 2053 if (expect_false (waittime < timeout_blocktime))
2054 waittime = timeout_blocktime;
2055
2056 sleeptime = waittime - backend_fudge;
2057
2058 if (expect_true (sleeptime > io_blocktime))
2059 sleeptime = io_blocktime;
2060
2061 if (sleeptime)
2062 {
2063 ev_sleep (sleeptime);
2064 waittime -= sleeptime;
2065 }
693 } 2066 }
694 2067
695 method_poll (block); 2068 ++loop_count;
2069 backend_poll (EV_A_ waittime);
696 2070
697 /* update ev_now, do magic */ 2071 /* update ev_rt_now, do magic */
698 time_update (); 2072 time_update (EV_A_ waittime + sleeptime);
2073 }
699 2074
700 /* queue pending timers and reschedule them */ 2075 /* queue pending timers and reschedule them */
701 timers_reify (); /* relative timers called last */ 2076 timers_reify (EV_A); /* relative timers called last */
2077#if EV_PERIODIC_ENABLE
702 periodics_reify (); /* absolute timers called first */ 2078 periodics_reify (EV_A); /* absolute timers called first */
2079#endif
703 2080
2081#if EV_IDLE_ENABLE
704 /* queue idle watchers unless io or timers are pending */ 2082 /* queue idle watchers unless other events are pending */
705 if (!pendingcnt) 2083 idle_reify (EV_A);
706 queue_events ((W *)idles, idlecnt, EV_IDLE); 2084#endif
707 2085
708 /* queue check watchers, to be executed first */ 2086 /* queue check watchers, to be executed first */
709 if (checkcnt) 2087 if (expect_false (checkcnt))
710 queue_events ((W *)checks, checkcnt, EV_CHECK); 2088 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
711 2089
712 call_pending (); 2090 call_pending (EV_A);
713 } 2091 }
714 while (!ev_loop_done); 2092 while (expect_true (
2093 activecnt
2094 && !loop_done
2095 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2096 ));
715 2097
716 if (ev_loop_done != 2) 2098 if (loop_done == EVUNLOOP_ONE)
2099 loop_done = EVUNLOOP_CANCEL;
2100}
2101
2102void
2103ev_unloop (EV_P_ int how)
2104{
717 ev_loop_done = 0; 2105 loop_done = how;
2106}
2107
2108void
2109ev_ref (EV_P)
2110{
2111 ++activecnt;
2112}
2113
2114void
2115ev_unref (EV_P)
2116{
2117 --activecnt;
2118}
2119
2120void
2121ev_now_update (EV_P)
2122{
2123 time_update (EV_A_ 1e100);
2124}
2125
2126void
2127ev_suspend (EV_P)
2128{
2129 ev_now_update (EV_A);
2130}
2131
2132void
2133ev_resume (EV_P)
2134{
2135 ev_tstamp mn_prev = mn_now;
2136
2137 ev_now_update (EV_A);
2138 printf ("update %f\n", mn_now - mn_prev);//D
2139 timers_reschedule (EV_A_ mn_now - mn_prev);
2140 periodics_reschedule (EV_A);
718} 2141}
719 2142
720/*****************************************************************************/ 2143/*****************************************************************************/
721 2144
722static void 2145inline_size void
723wlist_add (WL *head, WL elem) 2146wlist_add (WL *head, WL elem)
724{ 2147{
725 elem->next = *head; 2148 elem->next = *head;
726 *head = elem; 2149 *head = elem;
727} 2150}
728 2151
729static void 2152inline_size void
730wlist_del (WL *head, WL elem) 2153wlist_del (WL *head, WL elem)
731{ 2154{
732 while (*head) 2155 while (*head)
733 { 2156 {
734 if (*head == elem) 2157 if (*head == elem)
… …
739 2162
740 head = &(*head)->next; 2163 head = &(*head)->next;
741 } 2164 }
742} 2165}
743 2166
744static void 2167inline_speed void
745ev_clear_pending (W w) 2168clear_pending (EV_P_ W w)
746{ 2169{
747 if (w->pending) 2170 if (w->pending)
748 { 2171 {
749 pendings [w->pending - 1].w = 0; 2172 pendings [ABSPRI (w)][w->pending - 1].w = 0;
750 w->pending = 0; 2173 w->pending = 0;
751 } 2174 }
752} 2175}
753 2176
754static void 2177int
2178ev_clear_pending (EV_P_ void *w)
2179{
2180 W w_ = (W)w;
2181 int pending = w_->pending;
2182
2183 if (expect_true (pending))
2184 {
2185 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2186 w_->pending = 0;
2187 p->w = 0;
2188 return p->events;
2189 }
2190 else
2191 return 0;
2192}
2193
2194inline_size void
2195pri_adjust (EV_P_ W w)
2196{
2197 int pri = w->priority;
2198 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2199 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2200 w->priority = pri;
2201}
2202
2203inline_speed void
755ev_start (W w, int active) 2204ev_start (EV_P_ W w, int active)
756{ 2205{
2206 pri_adjust (EV_A_ w);
757 w->active = active; 2207 w->active = active;
2208 ev_ref (EV_A);
758} 2209}
759 2210
760static void 2211inline_size void
761ev_stop (W w) 2212ev_stop (EV_P_ W w)
762{ 2213{
2214 ev_unref (EV_A);
763 w->active = 0; 2215 w->active = 0;
764} 2216}
765 2217
766/*****************************************************************************/ 2218/*****************************************************************************/
767 2219
768void 2220void noinline
769ev_io_start (struct ev_io *w) 2221ev_io_start (EV_P_ ev_io *w)
770{ 2222{
771 int fd = w->fd; 2223 int fd = w->fd;
772 2224
773 if (ev_is_active (w)) 2225 if (expect_false (ev_is_active (w)))
774 return; 2226 return;
775 2227
776 assert (("ev_io_start called with negative fd", fd >= 0)); 2228 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2229 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
777 2230
2231 EV_FREQUENT_CHECK;
2232
778 ev_start ((W)w, 1); 2233 ev_start (EV_A_ (W)w, 1);
779 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2234 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
780 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2235 wlist_add (&anfds[fd].head, (WL)w);
781 2236
782 fd_change (fd); 2237 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
783} 2238 w->events &= ~EV__IOFDSET;
784 2239
785void 2240 EV_FREQUENT_CHECK;
2241}
2242
2243void noinline
786ev_io_stop (struct ev_io *w) 2244ev_io_stop (EV_P_ ev_io *w)
787{ 2245{
788 ev_clear_pending ((W)w); 2246 clear_pending (EV_A_ (W)w);
789 if (!ev_is_active (w)) 2247 if (expect_false (!ev_is_active (w)))
790 return; 2248 return;
791 2249
2250 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2251
2252 EV_FREQUENT_CHECK;
2253
792 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2254 wlist_del (&anfds[w->fd].head, (WL)w);
793 ev_stop ((W)w); 2255 ev_stop (EV_A_ (W)w);
794 2256
795 fd_change (w->fd); 2257 fd_change (EV_A_ w->fd, 1);
796}
797 2258
798void 2259 EV_FREQUENT_CHECK;
2260}
2261
2262void noinline
799ev_timer_start (struct ev_timer *w) 2263ev_timer_start (EV_P_ ev_timer *w)
800{ 2264{
801 if (ev_is_active (w)) 2265 if (expect_false (ev_is_active (w)))
802 return; 2266 return;
803 2267
804 w->at += now; 2268 ev_at (w) += mn_now;
805 2269
806 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2270 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
807 2271
808 ev_start ((W)w, ++timercnt); 2272 EV_FREQUENT_CHECK;
809 array_needsize (timers, timermax, timercnt, );
810 timers [timercnt - 1] = w;
811 upheap ((WT *)timers, timercnt - 1);
812}
813 2273
814void 2274 ++timercnt;
2275 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2276 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2277 ANHE_w (timers [ev_active (w)]) = (WT)w;
2278 ANHE_at_cache (timers [ev_active (w)]);
2279 upheap (timers, ev_active (w));
2280
2281 EV_FREQUENT_CHECK;
2282
2283 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2284}
2285
2286void noinline
815ev_timer_stop (struct ev_timer *w) 2287ev_timer_stop (EV_P_ ev_timer *w)
816{ 2288{
817 ev_clear_pending ((W)w); 2289 clear_pending (EV_A_ (W)w);
818 if (!ev_is_active (w)) 2290 if (expect_false (!ev_is_active (w)))
819 return; 2291 return;
820 2292
821 if (w->active < timercnt--) 2293 EV_FREQUENT_CHECK;
2294
2295 {
2296 int active = ev_active (w);
2297
2298 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2299
2300 --timercnt;
2301
2302 if (expect_true (active < timercnt + HEAP0))
822 { 2303 {
823 timers [w->active - 1] = timers [timercnt]; 2304 timers [active] = timers [timercnt + HEAP0];
824 downheap ((WT *)timers, timercnt, w->active - 1); 2305 adjustheap (timers, timercnt, active);
825 } 2306 }
2307 }
826 2308
827 w->at = w->repeat; 2309 EV_FREQUENT_CHECK;
828 2310
2311 ev_at (w) -= mn_now;
2312
829 ev_stop ((W)w); 2313 ev_stop (EV_A_ (W)w);
830} 2314}
831 2315
832void 2316void noinline
833ev_timer_again (struct ev_timer *w) 2317ev_timer_again (EV_P_ ev_timer *w)
834{ 2318{
2319 EV_FREQUENT_CHECK;
2320
835 if (ev_is_active (w)) 2321 if (ev_is_active (w))
836 { 2322 {
837 if (w->repeat) 2323 if (w->repeat)
838 { 2324 {
839 w->at = now + w->repeat; 2325 ev_at (w) = mn_now + w->repeat;
2326 ANHE_at_cache (timers [ev_active (w)]);
840 downheap ((WT *)timers, timercnt, w->active - 1); 2327 adjustheap (timers, timercnt, ev_active (w));
841 } 2328 }
842 else 2329 else
843 ev_timer_stop (w); 2330 ev_timer_stop (EV_A_ w);
844 } 2331 }
845 else if (w->repeat) 2332 else if (w->repeat)
2333 {
2334 ev_at (w) = w->repeat;
846 ev_timer_start (w); 2335 ev_timer_start (EV_A_ w);
847} 2336 }
848 2337
849void 2338 EV_FREQUENT_CHECK;
2339}
2340
2341#if EV_PERIODIC_ENABLE
2342void noinline
850ev_periodic_start (struct ev_periodic *w) 2343ev_periodic_start (EV_P_ ev_periodic *w)
851{ 2344{
852 if (ev_is_active (w)) 2345 if (expect_false (ev_is_active (w)))
853 return; 2346 return;
854 2347
2348 if (w->reschedule_cb)
2349 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2350 else if (w->interval)
2351 {
855 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2352 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
856
857 /* this formula differs from the one in periodic_reify because we do not always round up */ 2353 /* this formula differs from the one in periodic_reify because we do not always round up */
858 if (w->interval)
859 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 2354 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2355 }
2356 else
2357 ev_at (w) = w->offset;
860 2358
2359 EV_FREQUENT_CHECK;
2360
2361 ++periodiccnt;
861 ev_start ((W)w, ++periodiccnt); 2362 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
862 array_needsize (periodics, periodicmax, periodiccnt, ); 2363 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
863 periodics [periodiccnt - 1] = w; 2364 ANHE_w (periodics [ev_active (w)]) = (WT)w;
864 upheap ((WT *)periodics, periodiccnt - 1); 2365 ANHE_at_cache (periodics [ev_active (w)]);
865} 2366 upheap (periodics, ev_active (w));
866 2367
867void 2368 EV_FREQUENT_CHECK;
2369
2370 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2371}
2372
2373void noinline
868ev_periodic_stop (struct ev_periodic *w) 2374ev_periodic_stop (EV_P_ ev_periodic *w)
869{ 2375{
870 ev_clear_pending ((W)w); 2376 clear_pending (EV_A_ (W)w);
871 if (!ev_is_active (w)) 2377 if (expect_false (!ev_is_active (w)))
872 return; 2378 return;
873 2379
874 if (w->active < periodiccnt--) 2380 EV_FREQUENT_CHECK;
2381
2382 {
2383 int active = ev_active (w);
2384
2385 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2386
2387 --periodiccnt;
2388
2389 if (expect_true (active < periodiccnt + HEAP0))
875 { 2390 {
876 periodics [w->active - 1] = periodics [periodiccnt]; 2391 periodics [active] = periodics [periodiccnt + HEAP0];
877 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2392 adjustheap (periodics, periodiccnt, active);
878 } 2393 }
2394 }
879 2395
2396 EV_FREQUENT_CHECK;
2397
880 ev_stop ((W)w); 2398 ev_stop (EV_A_ (W)w);
881} 2399}
882 2400
883void 2401void noinline
2402ev_periodic_again (EV_P_ ev_periodic *w)
2403{
2404 /* TODO: use adjustheap and recalculation */
2405 ev_periodic_stop (EV_A_ w);
2406 ev_periodic_start (EV_A_ w);
2407}
2408#endif
2409
2410#ifndef SA_RESTART
2411# define SA_RESTART 0
2412#endif
2413
2414void noinline
884ev_signal_start (struct ev_signal *w) 2415ev_signal_start (EV_P_ ev_signal *w)
885{ 2416{
2417#if EV_MULTIPLICITY
2418 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2419#endif
886 if (ev_is_active (w)) 2420 if (expect_false (ev_is_active (w)))
887 return; 2421 return;
888 2422
889 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2423 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
890 2424
2425 evpipe_init (EV_A);
2426
2427 EV_FREQUENT_CHECK;
2428
2429 {
2430#ifndef _WIN32
2431 sigset_t full, prev;
2432 sigfillset (&full);
2433 sigprocmask (SIG_SETMASK, &full, &prev);
2434#endif
2435
2436 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2437
2438#ifndef _WIN32
2439 sigprocmask (SIG_SETMASK, &prev, 0);
2440#endif
2441 }
2442
891 ev_start ((W)w, 1); 2443 ev_start (EV_A_ (W)w, 1);
892 array_needsize (signals, signalmax, w->signum, signals_init);
893 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2444 wlist_add (&signals [w->signum - 1].head, (WL)w);
894 2445
895 if (!w->next) 2446 if (!((WL)w)->next)
896 { 2447 {
2448#if _WIN32
2449 signal (w->signum, ev_sighandler);
2450#else
897 struct sigaction sa; 2451 struct sigaction sa;
898 sa.sa_handler = sighandler; 2452 sa.sa_handler = ev_sighandler;
899 sigfillset (&sa.sa_mask); 2453 sigfillset (&sa.sa_mask);
900 sa.sa_flags = 0; 2454 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
901 sigaction (w->signum, &sa, 0); 2455 sigaction (w->signum, &sa, 0);
2456#endif
902 } 2457 }
903}
904 2458
905void 2459 EV_FREQUENT_CHECK;
2460}
2461
2462void noinline
906ev_signal_stop (struct ev_signal *w) 2463ev_signal_stop (EV_P_ ev_signal *w)
907{ 2464{
908 ev_clear_pending ((W)w); 2465 clear_pending (EV_A_ (W)w);
909 if (!ev_is_active (w)) 2466 if (expect_false (!ev_is_active (w)))
910 return; 2467 return;
911 2468
2469 EV_FREQUENT_CHECK;
2470
912 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2471 wlist_del (&signals [w->signum - 1].head, (WL)w);
913 ev_stop ((W)w); 2472 ev_stop (EV_A_ (W)w);
914 2473
915 if (!signals [w->signum - 1].head) 2474 if (!signals [w->signum - 1].head)
916 signal (w->signum, SIG_DFL); 2475 signal (w->signum, SIG_DFL);
917}
918 2476
2477 EV_FREQUENT_CHECK;
2478}
2479
919void 2480void
920ev_idle_start (struct ev_idle *w) 2481ev_child_start (EV_P_ ev_child *w)
921{ 2482{
2483#if EV_MULTIPLICITY
2484 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2485#endif
922 if (ev_is_active (w)) 2486 if (expect_false (ev_is_active (w)))
923 return; 2487 return;
924 2488
925 ev_start ((W)w, ++idlecnt); 2489 EV_FREQUENT_CHECK;
926 array_needsize (idles, idlemax, idlecnt, );
927 idles [idlecnt - 1] = w;
928}
929 2490
2491 ev_start (EV_A_ (W)w, 1);
2492 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2493
2494 EV_FREQUENT_CHECK;
2495}
2496
930void 2497void
931ev_idle_stop (struct ev_idle *w) 2498ev_child_stop (EV_P_ ev_child *w)
932{ 2499{
933 ev_clear_pending ((W)w); 2500 clear_pending (EV_A_ (W)w);
934 if (ev_is_active (w)) 2501 if (expect_false (!ev_is_active (w)))
935 return; 2502 return;
936 2503
937 idles [w->active - 1] = idles [--idlecnt]; 2504 EV_FREQUENT_CHECK;
2505
2506 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
938 ev_stop ((W)w); 2507 ev_stop (EV_A_ (W)w);
939}
940 2508
941void 2509 EV_FREQUENT_CHECK;
942ev_prepare_start (struct ev_prepare *w) 2510}
2511
2512#if EV_STAT_ENABLE
2513
2514# ifdef _WIN32
2515# undef lstat
2516# define lstat(a,b) _stati64 (a,b)
2517# endif
2518
2519#define DEF_STAT_INTERVAL 5.0074891
2520#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2521#define MIN_STAT_INTERVAL 0.1074891
2522
2523static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2524
2525#if EV_USE_INOTIFY
2526# define EV_INOTIFY_BUFSIZE 8192
2527
2528static void noinline
2529infy_add (EV_P_ ev_stat *w)
943{ 2530{
944 if (ev_is_active (w)) 2531 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);
2532
2533 if (w->wd < 0)
2534 {
2535 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2536 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2537
2538 /* monitor some parent directory for speedup hints */
2539 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2540 /* but an efficiency issue only */
2541 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2542 {
2543 char path [4096];
2544 strcpy (path, w->path);
2545
2546 do
2547 {
2548 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2549 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2550
2551 char *pend = strrchr (path, '/');
2552
2553 if (!pend || pend == path)
2554 break;
2555
2556 *pend = 0;
2557 w->wd = inotify_add_watch (fs_fd, path, mask);
2558 }
2559 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2560 }
2561 }
2562
2563 if (w->wd >= 0)
2564 {
2565 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2566
2567 /* now local changes will be tracked by inotify, but remote changes won't */
2568 /* unless the filesystem it known to be local, we therefore still poll */
2569 /* also do poll on <2.6.25, but with normal frequency */
2570 struct statfs sfs;
2571
2572 if (fs_2625 && !statfs (w->path, &sfs))
2573 if (sfs.f_type == 0x1373 /* devfs */
2574 || sfs.f_type == 0xEF53 /* ext2/3 */
2575 || sfs.f_type == 0x3153464a /* jfs */
2576 || sfs.f_type == 0x52654973 /* reiser3 */
2577 || sfs.f_type == 0x01021994 /* tempfs */
2578 || sfs.f_type == 0x58465342 /* xfs */)
2579 return;
2580
2581 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2582 ev_timer_again (EV_A_ &w->timer);
2583 }
2584}
2585
2586static void noinline
2587infy_del (EV_P_ ev_stat *w)
2588{
2589 int slot;
2590 int wd = w->wd;
2591
2592 if (wd < 0)
945 return; 2593 return;
946 2594
2595 w->wd = -2;
2596 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2597 wlist_del (&fs_hash [slot].head, (WL)w);
2598
2599 /* remove this watcher, if others are watching it, they will rearm */
2600 inotify_rm_watch (fs_fd, wd);
2601}
2602
2603static void noinline
2604infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2605{
2606 if (slot < 0)
2607 /* overflow, need to check for all hash slots */
2608 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2609 infy_wd (EV_A_ slot, wd, ev);
2610 else
2611 {
2612 WL w_;
2613
2614 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2615 {
2616 ev_stat *w = (ev_stat *)w_;
2617 w_ = w_->next; /* lets us remove this watcher and all before it */
2618
2619 if (w->wd == wd || wd == -1)
2620 {
2621 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2622 {
2623 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2624 w->wd = -1;
2625 infy_add (EV_A_ w); /* re-add, no matter what */
2626 }
2627
2628 stat_timer_cb (EV_A_ &w->timer, 0);
2629 }
2630 }
2631 }
2632}
2633
2634static void
2635infy_cb (EV_P_ ev_io *w, int revents)
2636{
2637 char buf [EV_INOTIFY_BUFSIZE];
2638 struct inotify_event *ev = (struct inotify_event *)buf;
2639 int ofs;
2640 int len = read (fs_fd, buf, sizeof (buf));
2641
2642 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2643 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2644}
2645
2646inline_size void
2647check_2625 (EV_P)
2648{
2649 /* kernels < 2.6.25 are borked
2650 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2651 */
2652 struct utsname buf;
2653 int major, minor, micro;
2654
2655 if (uname (&buf))
2656 return;
2657
2658 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2659 return;
2660
2661 if (major < 2
2662 || (major == 2 && minor < 6)
2663 || (major == 2 && minor == 6 && micro < 25))
2664 return;
2665
2666 fs_2625 = 1;
2667}
2668
2669inline_size void
2670infy_init (EV_P)
2671{
2672 if (fs_fd != -2)
2673 return;
2674
2675 fs_fd = -1;
2676
2677 check_2625 (EV_A);
2678
2679 fs_fd = inotify_init ();
2680
2681 if (fs_fd >= 0)
2682 {
2683 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2684 ev_set_priority (&fs_w, EV_MAXPRI);
2685 ev_io_start (EV_A_ &fs_w);
2686 }
2687}
2688
2689inline_size void
2690infy_fork (EV_P)
2691{
2692 int slot;
2693
2694 if (fs_fd < 0)
2695 return;
2696
2697 close (fs_fd);
2698 fs_fd = inotify_init ();
2699
2700 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2701 {
2702 WL w_ = fs_hash [slot].head;
2703 fs_hash [slot].head = 0;
2704
2705 while (w_)
2706 {
2707 ev_stat *w = (ev_stat *)w_;
2708 w_ = w_->next; /* lets us add this watcher */
2709
2710 w->wd = -1;
2711
2712 if (fs_fd >= 0)
2713 infy_add (EV_A_ w); /* re-add, no matter what */
2714 else
2715 ev_timer_again (EV_A_ &w->timer);
2716 }
2717 }
2718}
2719
2720#endif
2721
2722#ifdef _WIN32
2723# define EV_LSTAT(p,b) _stati64 (p, b)
2724#else
2725# define EV_LSTAT(p,b) lstat (p, b)
2726#endif
2727
2728void
2729ev_stat_stat (EV_P_ ev_stat *w)
2730{
2731 if (lstat (w->path, &w->attr) < 0)
2732 w->attr.st_nlink = 0;
2733 else if (!w->attr.st_nlink)
2734 w->attr.st_nlink = 1;
2735}
2736
2737static void noinline
2738stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2739{
2740 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2741
2742 /* we copy this here each the time so that */
2743 /* prev has the old value when the callback gets invoked */
2744 w->prev = w->attr;
2745 ev_stat_stat (EV_A_ w);
2746
2747 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2748 if (
2749 w->prev.st_dev != w->attr.st_dev
2750 || w->prev.st_ino != w->attr.st_ino
2751 || w->prev.st_mode != w->attr.st_mode
2752 || w->prev.st_nlink != w->attr.st_nlink
2753 || w->prev.st_uid != w->attr.st_uid
2754 || w->prev.st_gid != w->attr.st_gid
2755 || w->prev.st_rdev != w->attr.st_rdev
2756 || w->prev.st_size != w->attr.st_size
2757 || w->prev.st_atime != w->attr.st_atime
2758 || w->prev.st_mtime != w->attr.st_mtime
2759 || w->prev.st_ctime != w->attr.st_ctime
2760 ) {
2761 #if EV_USE_INOTIFY
2762 if (fs_fd >= 0)
2763 {
2764 infy_del (EV_A_ w);
2765 infy_add (EV_A_ w);
2766 ev_stat_stat (EV_A_ w); /* avoid race... */
2767 }
2768 #endif
2769
2770 ev_feed_event (EV_A_ w, EV_STAT);
2771 }
2772}
2773
2774void
2775ev_stat_start (EV_P_ ev_stat *w)
2776{
2777 if (expect_false (ev_is_active (w)))
2778 return;
2779
2780 ev_stat_stat (EV_A_ w);
2781
2782 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2783 w->interval = MIN_STAT_INTERVAL;
2784
2785 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2786 ev_set_priority (&w->timer, ev_priority (w));
2787
2788#if EV_USE_INOTIFY
2789 infy_init (EV_A);
2790
2791 if (fs_fd >= 0)
2792 infy_add (EV_A_ w);
2793 else
2794#endif
2795 ev_timer_again (EV_A_ &w->timer);
2796
2797 ev_start (EV_A_ (W)w, 1);
2798
2799 EV_FREQUENT_CHECK;
2800}
2801
2802void
2803ev_stat_stop (EV_P_ ev_stat *w)
2804{
2805 clear_pending (EV_A_ (W)w);
2806 if (expect_false (!ev_is_active (w)))
2807 return;
2808
2809 EV_FREQUENT_CHECK;
2810
2811#if EV_USE_INOTIFY
2812 infy_del (EV_A_ w);
2813#endif
2814 ev_timer_stop (EV_A_ &w->timer);
2815
2816 ev_stop (EV_A_ (W)w);
2817
2818 EV_FREQUENT_CHECK;
2819}
2820#endif
2821
2822#if EV_IDLE_ENABLE
2823void
2824ev_idle_start (EV_P_ ev_idle *w)
2825{
2826 if (expect_false (ev_is_active (w)))
2827 return;
2828
2829 pri_adjust (EV_A_ (W)w);
2830
2831 EV_FREQUENT_CHECK;
2832
2833 {
2834 int active = ++idlecnt [ABSPRI (w)];
2835
2836 ++idleall;
2837 ev_start (EV_A_ (W)w, active);
2838
2839 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2840 idles [ABSPRI (w)][active - 1] = w;
2841 }
2842
2843 EV_FREQUENT_CHECK;
2844}
2845
2846void
2847ev_idle_stop (EV_P_ ev_idle *w)
2848{
2849 clear_pending (EV_A_ (W)w);
2850 if (expect_false (!ev_is_active (w)))
2851 return;
2852
2853 EV_FREQUENT_CHECK;
2854
2855 {
2856 int active = ev_active (w);
2857
2858 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2859 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2860
2861 ev_stop (EV_A_ (W)w);
2862 --idleall;
2863 }
2864
2865 EV_FREQUENT_CHECK;
2866}
2867#endif
2868
2869void
2870ev_prepare_start (EV_P_ ev_prepare *w)
2871{
2872 if (expect_false (ev_is_active (w)))
2873 return;
2874
2875 EV_FREQUENT_CHECK;
2876
947 ev_start ((W)w, ++preparecnt); 2877 ev_start (EV_A_ (W)w, ++preparecnt);
948 array_needsize (prepares, preparemax, preparecnt, ); 2878 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
949 prepares [preparecnt - 1] = w; 2879 prepares [preparecnt - 1] = w;
950}
951 2880
2881 EV_FREQUENT_CHECK;
2882}
2883
952void 2884void
953ev_prepare_stop (struct ev_prepare *w) 2885ev_prepare_stop (EV_P_ ev_prepare *w)
954{ 2886{
955 ev_clear_pending ((W)w); 2887 clear_pending (EV_A_ (W)w);
956 if (ev_is_active (w)) 2888 if (expect_false (!ev_is_active (w)))
957 return; 2889 return;
958 2890
2891 EV_FREQUENT_CHECK;
2892
2893 {
2894 int active = ev_active (w);
2895
959 prepares [w->active - 1] = prepares [--preparecnt]; 2896 prepares [active - 1] = prepares [--preparecnt];
2897 ev_active (prepares [active - 1]) = active;
2898 }
2899
960 ev_stop ((W)w); 2900 ev_stop (EV_A_ (W)w);
961}
962 2901
2902 EV_FREQUENT_CHECK;
2903}
2904
963void 2905void
964ev_check_start (struct ev_check *w) 2906ev_check_start (EV_P_ ev_check *w)
965{ 2907{
966 if (ev_is_active (w)) 2908 if (expect_false (ev_is_active (w)))
967 return; 2909 return;
968 2910
2911 EV_FREQUENT_CHECK;
2912
969 ev_start ((W)w, ++checkcnt); 2913 ev_start (EV_A_ (W)w, ++checkcnt);
970 array_needsize (checks, checkmax, checkcnt, ); 2914 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
971 checks [checkcnt - 1] = w; 2915 checks [checkcnt - 1] = w;
972}
973 2916
2917 EV_FREQUENT_CHECK;
2918}
2919
974void 2920void
975ev_check_stop (struct ev_check *w) 2921ev_check_stop (EV_P_ ev_check *w)
976{ 2922{
977 ev_clear_pending ((W)w); 2923 clear_pending (EV_A_ (W)w);
978 if (ev_is_active (w)) 2924 if (expect_false (!ev_is_active (w)))
979 return; 2925 return;
980 2926
2927 EV_FREQUENT_CHECK;
2928
2929 {
2930 int active = ev_active (w);
2931
981 checks [w->active - 1] = checks [--checkcnt]; 2932 checks [active - 1] = checks [--checkcnt];
2933 ev_active (checks [active - 1]) = active;
2934 }
2935
982 ev_stop ((W)w); 2936 ev_stop (EV_A_ (W)w);
983}
984 2937
985void 2938 EV_FREQUENT_CHECK;
986ev_child_start (struct ev_child *w) 2939}
2940
2941#if EV_EMBED_ENABLE
2942void noinline
2943ev_embed_sweep (EV_P_ ev_embed *w)
987{ 2944{
2945 ev_loop (w->other, EVLOOP_NONBLOCK);
2946}
2947
2948static void
2949embed_io_cb (EV_P_ ev_io *io, int revents)
2950{
2951 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2952
988 if (ev_is_active (w)) 2953 if (ev_cb (w))
2954 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2955 else
2956 ev_loop (w->other, EVLOOP_NONBLOCK);
2957}
2958
2959static void
2960embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2961{
2962 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2963
2964 {
2965 struct ev_loop *loop = w->other;
2966
2967 while (fdchangecnt)
2968 {
2969 fd_reify (EV_A);
2970 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2971 }
2972 }
2973}
2974
2975static void
2976embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2977{
2978 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2979
2980 ev_embed_stop (EV_A_ w);
2981
2982 {
2983 struct ev_loop *loop = w->other;
2984
2985 ev_loop_fork (EV_A);
2986 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2987 }
2988
2989 ev_embed_start (EV_A_ w);
2990}
2991
2992#if 0
2993static void
2994embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2995{
2996 ev_idle_stop (EV_A_ idle);
2997}
2998#endif
2999
3000void
3001ev_embed_start (EV_P_ ev_embed *w)
3002{
3003 if (expect_false (ev_is_active (w)))
989 return; 3004 return;
990 3005
3006 {
3007 struct ev_loop *loop = w->other;
3008 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3009 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3010 }
3011
3012 EV_FREQUENT_CHECK;
3013
3014 ev_set_priority (&w->io, ev_priority (w));
3015 ev_io_start (EV_A_ &w->io);
3016
3017 ev_prepare_init (&w->prepare, embed_prepare_cb);
3018 ev_set_priority (&w->prepare, EV_MINPRI);
3019 ev_prepare_start (EV_A_ &w->prepare);
3020
3021 ev_fork_init (&w->fork, embed_fork_cb);
3022 ev_fork_start (EV_A_ &w->fork);
3023
3024 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3025
991 ev_start ((W)w, 1); 3026 ev_start (EV_A_ (W)w, 1);
992 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
993}
994 3027
3028 EV_FREQUENT_CHECK;
3029}
3030
995void 3031void
996ev_child_stop (struct ev_child *w) 3032ev_embed_stop (EV_P_ ev_embed *w)
997{ 3033{
998 ev_clear_pending ((W)w); 3034 clear_pending (EV_A_ (W)w);
999 if (ev_is_active (w)) 3035 if (expect_false (!ev_is_active (w)))
1000 return; 3036 return;
1001 3037
1002 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 3038 EV_FREQUENT_CHECK;
3039
3040 ev_io_stop (EV_A_ &w->io);
3041 ev_prepare_stop (EV_A_ &w->prepare);
3042 ev_fork_stop (EV_A_ &w->fork);
3043
3044 EV_FREQUENT_CHECK;
3045}
3046#endif
3047
3048#if EV_FORK_ENABLE
3049void
3050ev_fork_start (EV_P_ ev_fork *w)
3051{
3052 if (expect_false (ev_is_active (w)))
3053 return;
3054
3055 EV_FREQUENT_CHECK;
3056
3057 ev_start (EV_A_ (W)w, ++forkcnt);
3058 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3059 forks [forkcnt - 1] = w;
3060
3061 EV_FREQUENT_CHECK;
3062}
3063
3064void
3065ev_fork_stop (EV_P_ ev_fork *w)
3066{
3067 clear_pending (EV_A_ (W)w);
3068 if (expect_false (!ev_is_active (w)))
3069 return;
3070
3071 EV_FREQUENT_CHECK;
3072
3073 {
3074 int active = ev_active (w);
3075
3076 forks [active - 1] = forks [--forkcnt];
3077 ev_active (forks [active - 1]) = active;
3078 }
3079
1003 ev_stop ((W)w); 3080 ev_stop (EV_A_ (W)w);
3081
3082 EV_FREQUENT_CHECK;
1004} 3083}
3084#endif
3085
3086#if EV_ASYNC_ENABLE
3087void
3088ev_async_start (EV_P_ ev_async *w)
3089{
3090 if (expect_false (ev_is_active (w)))
3091 return;
3092
3093 evpipe_init (EV_A);
3094
3095 EV_FREQUENT_CHECK;
3096
3097 ev_start (EV_A_ (W)w, ++asynccnt);
3098 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3099 asyncs [asynccnt - 1] = w;
3100
3101 EV_FREQUENT_CHECK;
3102}
3103
3104void
3105ev_async_stop (EV_P_ ev_async *w)
3106{
3107 clear_pending (EV_A_ (W)w);
3108 if (expect_false (!ev_is_active (w)))
3109 return;
3110
3111 EV_FREQUENT_CHECK;
3112
3113 {
3114 int active = ev_active (w);
3115
3116 asyncs [active - 1] = asyncs [--asynccnt];
3117 ev_active (asyncs [active - 1]) = active;
3118 }
3119
3120 ev_stop (EV_A_ (W)w);
3121
3122 EV_FREQUENT_CHECK;
3123}
3124
3125void
3126ev_async_send (EV_P_ ev_async *w)
3127{
3128 w->sent = 1;
3129 evpipe_write (EV_A_ &gotasync);
3130}
3131#endif
1005 3132
1006/*****************************************************************************/ 3133/*****************************************************************************/
1007 3134
1008struct ev_once 3135struct ev_once
1009{ 3136{
1010 struct ev_io io; 3137 ev_io io;
1011 struct ev_timer to; 3138 ev_timer to;
1012 void (*cb)(int revents, void *arg); 3139 void (*cb)(int revents, void *arg);
1013 void *arg; 3140 void *arg;
1014}; 3141};
1015 3142
1016static void 3143static void
1017once_cb (struct ev_once *once, int revents) 3144once_cb (EV_P_ struct ev_once *once, int revents)
1018{ 3145{
1019 void (*cb)(int revents, void *arg) = once->cb; 3146 void (*cb)(int revents, void *arg) = once->cb;
1020 void *arg = once->arg; 3147 void *arg = once->arg;
1021 3148
1022 ev_io_stop (&once->io); 3149 ev_io_stop (EV_A_ &once->io);
1023 ev_timer_stop (&once->to); 3150 ev_timer_stop (EV_A_ &once->to);
1024 free (once); 3151 ev_free (once);
1025 3152
1026 cb (revents, arg); 3153 cb (revents, arg);
1027} 3154}
1028 3155
1029static void 3156static void
1030once_cb_io (struct ev_io *w, int revents) 3157once_cb_io (EV_P_ ev_io *w, int revents)
1031{ 3158{
1032 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3159 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3160
3161 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1033} 3162}
1034 3163
1035static void 3164static void
1036once_cb_to (struct ev_timer *w, int revents) 3165once_cb_to (EV_P_ ev_timer *w, int revents)
1037{ 3166{
1038 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3167 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
1039}
1040 3168
3169 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3170}
3171
1041void 3172void
1042ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3173ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1043{ 3174{
1044 struct ev_once *once = malloc (sizeof (struct ev_once)); 3175 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1045 3176
1046 if (!once) 3177 if (expect_false (!once))
3178 {
1047 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3179 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1048 else 3180 return;
1049 { 3181 }
3182
1050 once->cb = cb; 3183 once->cb = cb;
1051 once->arg = arg; 3184 once->arg = arg;
1052 3185
1053 ev_watcher_init (&once->io, once_cb_io); 3186 ev_init (&once->io, once_cb_io);
1054 if (fd >= 0) 3187 if (fd >= 0)
3188 {
3189 ev_io_set (&once->io, fd, events);
3190 ev_io_start (EV_A_ &once->io);
3191 }
3192
3193 ev_init (&once->to, once_cb_to);
3194 if (timeout >= 0.)
3195 {
3196 ev_timer_set (&once->to, timeout, 0.);
3197 ev_timer_start (EV_A_ &once->to);
3198 }
3199}
3200
3201/*****************************************************************************/
3202
3203#if 0
3204void
3205ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3206{
3207 int i, j;
3208 ev_watcher_list *wl, *wn;
3209
3210 if (types & (EV_IO | EV_EMBED))
3211 for (i = 0; i < anfdmax; ++i)
3212 for (wl = anfds [i].head; wl; )
1055 { 3213 {
1056 ev_io_set (&once->io, fd, events); 3214 wn = wl->next;
1057 ev_io_start (&once->io); 3215
3216#if EV_EMBED_ENABLE
3217 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3218 {
3219 if (types & EV_EMBED)
3220 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3221 }
3222 else
3223#endif
3224#if EV_USE_INOTIFY
3225 if (ev_cb ((ev_io *)wl) == infy_cb)
3226 ;
3227 else
3228#endif
3229 if ((ev_io *)wl != &pipeev)
3230 if (types & EV_IO)
3231 cb (EV_A_ EV_IO, wl);
3232
3233 wl = wn;
1058 } 3234 }
1059 3235
1060 ev_watcher_init (&once->to, once_cb_to); 3236 if (types & (EV_TIMER | EV_STAT))
1061 if (timeout >= 0.) 3237 for (i = timercnt + HEAP0; i-- > HEAP0; )
3238#if EV_STAT_ENABLE
3239 /*TODO: timer is not always active*/
3240 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1062 { 3241 {
1063 ev_timer_set (&once->to, timeout, 0.); 3242 if (types & EV_STAT)
1064 ev_timer_start (&once->to); 3243 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1065 } 3244 }
1066 } 3245 else
1067} 3246#endif
3247 if (types & EV_TIMER)
3248 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1068 3249
1069/*****************************************************************************/ 3250#if EV_PERIODIC_ENABLE
3251 if (types & EV_PERIODIC)
3252 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3253 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3254#endif
1070 3255
1071#if 0 3256#if EV_IDLE_ENABLE
3257 if (types & EV_IDLE)
3258 for (j = NUMPRI; i--; )
3259 for (i = idlecnt [j]; i--; )
3260 cb (EV_A_ EV_IDLE, idles [j][i]);
3261#endif
1072 3262
1073struct ev_io wio; 3263#if EV_FORK_ENABLE
3264 if (types & EV_FORK)
3265 for (i = forkcnt; i--; )
3266 if (ev_cb (forks [i]) != embed_fork_cb)
3267 cb (EV_A_ EV_FORK, forks [i]);
3268#endif
1074 3269
1075static void 3270#if EV_ASYNC_ENABLE
1076sin_cb (struct ev_io *w, int revents) 3271 if (types & EV_ASYNC)
1077{ 3272 for (i = asynccnt; i--; )
1078 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 3273 cb (EV_A_ EV_ASYNC, asyncs [i]);
1079} 3274#endif
1080 3275
1081static void 3276 if (types & EV_PREPARE)
1082ocb (struct ev_timer *w, int revents) 3277 for (i = preparecnt; i--; )
1083{ 3278#if EV_EMBED_ENABLE
1084 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 3279 if (ev_cb (prepares [i]) != embed_prepare_cb)
1085 ev_timer_stop (w); 3280#endif
1086 ev_timer_start (w); 3281 cb (EV_A_ EV_PREPARE, prepares [i]);
1087}
1088 3282
1089static void 3283 if (types & EV_CHECK)
1090scb (struct ev_signal *w, int revents) 3284 for (i = checkcnt; i--; )
1091{ 3285 cb (EV_A_ EV_CHECK, checks [i]);
1092 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1093 ev_io_stop (&wio);
1094 ev_io_start (&wio);
1095}
1096 3286
1097static void 3287 if (types & EV_SIGNAL)
1098gcb (struct ev_signal *w, int revents)
1099{
1100 fprintf (stderr, "generic %x\n", revents);
1101
1102}
1103
1104int main (void)
1105{
1106 ev_init (0);
1107
1108 ev_io_init (&wio, sin_cb, 0, EV_READ);
1109 ev_io_start (&wio);
1110
1111 struct ev_timer t[10000];
1112
1113#if 0
1114 int i;
1115 for (i = 0; i < 10000; ++i) 3288 for (i = 0; i < signalmax; ++i)
1116 { 3289 for (wl = signals [i].head; wl; )
1117 struct ev_timer *w = t + i; 3290 {
1118 ev_watcher_init (w, ocb, i); 3291 wn = wl->next;
1119 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533); 3292 cb (EV_A_ EV_SIGNAL, wl);
1120 ev_timer_start (w); 3293 wl = wn;
1121 if (drand48 () < 0.5) 3294 }
1122 ev_timer_stop (w);
1123 }
1124#endif
1125 3295
1126 struct ev_timer t1; 3296 if (types & EV_CHILD)
1127 ev_timer_init (&t1, ocb, 5, 10); 3297 for (i = EV_PID_HASHSIZE; i--; )
1128 ev_timer_start (&t1); 3298 for (wl = childs [i]; wl; )
1129 3299 {
1130 struct ev_signal sig; 3300 wn = wl->next;
1131 ev_signal_init (&sig, scb, SIGQUIT); 3301 cb (EV_A_ EV_CHILD, wl);
1132 ev_signal_start (&sig); 3302 wl = wn;
1133 3303 }
1134 struct ev_check cw; 3304/* EV_STAT 0x00001000 /* stat data changed */
1135 ev_check_init (&cw, gcb); 3305/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
1136 ev_check_start (&cw);
1137
1138 struct ev_idle iw;
1139 ev_idle_init (&iw, gcb);
1140 ev_idle_start (&iw);
1141
1142 ev_loop (0);
1143
1144 return 0;
1145} 3306}
1146
1147#endif 3307#endif
1148 3308
3309#if EV_MULTIPLICITY
3310 #include "ev_wrap.h"
3311#endif
1149 3312
3313#ifdef __cplusplus
3314}
3315#endif
1150 3316
1151

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