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Comparing libev/ev.c (file contents):
Revision 1.50 by root, Sat Nov 3 19:41:55 2007 UTC vs.
Revision 1.286 by root, Wed Apr 15 19:37:15 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 */
31#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
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>
156#include <time.h>
157
158#include <signal.h>
159
160#ifdef EV_H
161# include EV_H
162#else
163# include "ev.h"
164#endif
165
47#ifndef WIN32 166#ifndef _WIN32
167# include <sys/time.h>
48# include <sys/wait.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
49#endif 176# endif
50#include <sys/time.h> 177#endif
51#include <time.h>
52 178
53/**/ 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
54 188
55#ifndef EV_USE_MONOTONIC 189#ifndef EV_USE_MONOTONIC
190# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
56# define EV_USE_MONOTONIC 1 191# define EV_USE_MONOTONIC 1
192# else
193# define EV_USE_MONOTONIC 0
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
57#endif 207#endif
58 208
59#ifndef EV_USE_SELECT 209#ifndef EV_USE_SELECT
60# define EV_USE_SELECT 1 210# define EV_USE_SELECT 1
61#endif 211#endif
62 212
63#ifndef EV_USE_POLL 213#ifndef EV_USE_POLL
64# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ 214# ifdef _WIN32
215# define EV_USE_POLL 0
216# else
217# define EV_USE_POLL 1
218# endif
65#endif 219#endif
66 220
67#ifndef EV_USE_EPOLL 221#ifndef EV_USE_EPOLL
222# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
223# define EV_USE_EPOLL 1
224# else
68# define EV_USE_EPOLL 0 225# define EV_USE_EPOLL 0
226# endif
69#endif 227#endif
70 228
71#ifndef EV_USE_KQUEUE 229#ifndef EV_USE_KQUEUE
72# define EV_USE_KQUEUE 0 230# define EV_USE_KQUEUE 0
73#endif 231#endif
74 232
75#ifndef EV_USE_REALTIME 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))
76# define EV_USE_REALTIME 1 239# define EV_USE_INOTIFY 1
240# else
241# define EV_USE_INOTIFY 0
77#endif 242# endif
243#endif
78 244
79/**/ 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 */
80 288
81#ifndef CLOCK_MONOTONIC 289#ifndef CLOCK_MONOTONIC
82# undef EV_USE_MONOTONIC 290# undef EV_USE_MONOTONIC
83# define EV_USE_MONOTONIC 0 291# define EV_USE_MONOTONIC 0
84#endif 292#endif
… …
86#ifndef CLOCK_REALTIME 294#ifndef CLOCK_REALTIME
87# undef EV_USE_REALTIME 295# undef EV_USE_REALTIME
88# define EV_USE_REALTIME 0 296# define EV_USE_REALTIME 0
89#endif 297#endif
90 298
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>
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
91/**/ 346/**/
92 347
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 */
363
93#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) */
94#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 365#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
95#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
96/*#define CLEANUP_INTERVAL 300. /* 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 */
97 367
98#include "ev.h"
99
100#if __GNUC__ >= 3 368#if __GNUC__ >= 4
101# define expect(expr,value) __builtin_expect ((expr),(value)) 369# define expect(expr,value) __builtin_expect ((expr),(value))
102# define inline inline 370# define noinline __attribute__ ((noinline))
103#else 371#else
104# define expect(expr,value) (expr) 372# define expect(expr,value) (expr)
105# define inline static 373# define noinline
374# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
375# define inline
376# endif
106#endif 377#endif
107 378
108#define expect_false(expr) expect ((expr) != 0, 0) 379#define expect_false(expr) expect ((expr) != 0, 0)
109#define expect_true(expr) expect ((expr) != 0, 1) 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
110 388
111#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 389#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
112#define ABSPRI(w) ((w)->priority - EV_MINPRI) 390#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
113 391
392#define EMPTY /* required for microsofts broken pseudo-c compiler */
393#define EMPTY2(a,b) /* used to suppress some warnings */
394
114typedef struct ev_watcher *W; 395typedef ev_watcher *W;
115typedef struct ev_watcher_list *WL; 396typedef ev_watcher_list *WL;
116typedef struct ev_watcher_time *WT; 397typedef ev_watcher_time *WT;
117 398
118static ev_tstamp now_floor, 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
119ev_tstamp ev_now; 547 ev_tstamp ev_rt_now;
120int ev_method; 548 #define VAR(name,decl) static decl;
549 #include "ev_vars.h"
550 #undef VAR
121 551
122static int have_monotonic; /* runtime */ 552 static int ev_default_loop_ptr;
123 553
124static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 554#endif
125static void (*method_modify)(int fd, int oev, int nev);
126static void (*method_poll)(ev_tstamp timeout);
127 555
128/*****************************************************************************/ 556/*****************************************************************************/
129 557
130ev_tstamp 558ev_tstamp
131ev_time (void) 559ev_time (void)
132{ 560{
133#if EV_USE_REALTIME 561#if EV_USE_REALTIME
562 if (expect_true (have_realtime))
563 {
134 struct timespec ts; 564 struct timespec ts;
135 clock_gettime (CLOCK_REALTIME, &ts); 565 clock_gettime (CLOCK_REALTIME, &ts);
136 return ts.tv_sec + ts.tv_nsec * 1e-9; 566 return ts.tv_sec + ts.tv_nsec * 1e-9;
137#else 567 }
568#endif
569
138 struct timeval tv; 570 struct timeval tv;
139 gettimeofday (&tv, 0); 571 gettimeofday (&tv, 0);
140 return tv.tv_sec + tv.tv_usec * 1e-6; 572 return tv.tv_sec + tv.tv_usec * 1e-6;
141#endif
142} 573}
143 574
144static ev_tstamp 575inline_size ev_tstamp
145get_clock (void) 576get_clock (void)
146{ 577{
147#if EV_USE_MONOTONIC 578#if EV_USE_MONOTONIC
148 if (expect_true (have_monotonic)) 579 if (expect_true (have_monotonic))
149 { 580 {
… …
154#endif 585#endif
155 586
156 return ev_time (); 587 return ev_time ();
157} 588}
158 589
159#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
160 597
161#define array_needsize(base,cur,cnt,init) \ 598void
162 if (expect_false ((cnt) > cur)) \ 599ev_sleep (ev_tstamp delay)
163 { \ 600{
164 int newcnt = cur; \ 601 if (delay > 0.)
165 do \
166 { \
167 newcnt = array_roundsize (base, newcnt << 1); \
168 } \
169 while ((cnt) > newcnt); \
170 \
171 base = realloc (base, sizeof (*base) * (newcnt)); \
172 init (base + cur, newcnt - cur); \
173 cur = newcnt; \
174 } 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}
175 625
176/*****************************************************************************/ 626/*****************************************************************************/
177 627
178typedef struct 628#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
179{
180 struct ev_watcher_list *head;
181 unsigned char events;
182 unsigned char reify;
183} ANFD;
184 629
185static ANFD *anfds; 630inline_size int
186static int anfdmax; 631array_nextsize (int elem, int cur, int cnt)
187
188static void
189anfds_init (ANFD *base, int count)
190{ 632{
191 while (count--) 633 int ncur = cur + 1;
192 {
193 base->head = 0;
194 base->events = EV_NONE;
195 base->reify = 0;
196 634
197 ++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)
198 } 641 {
199} 642 ncur *= elem;
200 643 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
201typedef struct 644 ncur = ncur - sizeof (void *) * 4;
202{ 645 ncur /= elem;
203 W w;
204 int events;
205} ANPENDING;
206
207static ANPENDING *pendings [NUMPRI];
208static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
209
210static void
211event (W w, int events)
212{
213 if (w->pending)
214 { 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_;
215 pendings [ABSPRI (w)][w->pending - 1].events |= events; 698 pendings [pri][w_->pending - 1].events = revents;
216 return;
217 } 699 }
218
219 w->pending = ++pendingcnt [ABSPRI (w)];
220 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
221 pendings [ABSPRI (w)][w->pending - 1].w = w;
222 pendings [ABSPRI (w)][w->pending - 1].events = events;
223} 700}
224 701
225static 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
226queue_events (W *events, int eventcnt, int type) 718queue_events (EV_P_ W *events, int eventcnt, int type)
227{ 719{
228 int i; 720 int i;
229 721
230 for (i = 0; i < eventcnt; ++i) 722 for (i = 0; i < eventcnt; ++i)
231 event (events [i], type); 723 ev_feed_event (EV_A_ events [i], type);
232} 724}
233 725
234static void 726/*****************************************************************************/
727
728inline_speed void
235fd_event (int fd, int events) 729fd_event (EV_P_ int fd, int revents)
236{ 730{
237 ANFD *anfd = anfds + fd; 731 ANFD *anfd = anfds + fd;
238 struct ev_io *w; 732 ev_io *w;
239 733
240 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 734 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
241 { 735 {
242 int ev = w->events & events; 736 int ev = w->events & revents;
243 737
244 if (ev) 738 if (ev)
245 event ((W)w, ev); 739 ev_feed_event (EV_A_ (W)w, ev);
246 } 740 }
247} 741}
248 742
249/*****************************************************************************/ 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}
250 749
251static int *fdchanges; 750inline_size void
252static int fdchangemax, fdchangecnt; 751fd_reify (EV_P)
253
254static void
255fd_reify (void)
256{ 752{
257 int i; 753 int i;
258 754
259 for (i = 0; i < fdchangecnt; ++i) 755 for (i = 0; i < fdchangecnt; ++i)
260 { 756 {
261 int fd = fdchanges [i]; 757 int fd = fdchanges [i];
262 ANFD *anfd = anfds + fd; 758 ANFD *anfd = anfds + fd;
263 struct ev_io *w; 759 ev_io *w;
264 760
265 int events = 0; 761 unsigned char events = 0;
266 762
267 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 763 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
268 events |= w->events; 764 events |= (unsigned char)w->events;
269 765
270 anfd->reify = 0; 766#if EV_SELECT_IS_WINSOCKET
271 767 if (events)
272 if (anfd->events != events)
273 { 768 {
274 method_modify (fd, anfd->events, events); 769 unsigned long arg;
275 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));
276 } 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 }
277 } 789 }
278 790
279 fdchangecnt = 0; 791 fdchangecnt = 0;
280} 792}
281 793
282static void 794inline_size void
283fd_change (int fd) 795fd_change (EV_P_ int fd, int flags)
284{ 796{
285 if (anfds [fd].reify || fdchangecnt < 0) 797 unsigned char reify = anfds [fd].reify;
286 return;
287
288 anfds [fd].reify = 1; 798 anfds [fd].reify |= flags;
289 799
800 if (expect_true (!reify))
801 {
290 ++fdchangecnt; 802 ++fdchangecnt;
291 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 803 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
292 fdchanges [fdchangecnt - 1] = fd; 804 fdchanges [fdchangecnt - 1] = fd;
805 }
293} 806}
294 807
295static void 808inline_speed void
296fd_kill (int fd) 809fd_kill (EV_P_ int fd)
297{ 810{
298 struct ev_io *w; 811 ev_io *w;
299 812
300 while ((w = (struct ev_io *)anfds [fd].head)) 813 while ((w = (ev_io *)anfds [fd].head))
301 { 814 {
302 ev_io_stop (w); 815 ev_io_stop (EV_A_ w);
303 event ((W)w, EV_ERROR | EV_READ | EV_WRITE); 816 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
304 } 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
305} 828}
306 829
307/* called on EBADF to verify fds */ 830/* called on EBADF to verify fds */
308static void 831static void noinline
309fd_ebadf (void) 832fd_ebadf (EV_P)
310{ 833{
311 int fd; 834 int fd;
312 835
313 for (fd = 0; fd < anfdmax; ++fd) 836 for (fd = 0; fd < anfdmax; ++fd)
314 if (anfds [fd].events) 837 if (anfds [fd].events)
315 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 838 if (!fd_valid (fd) && errno == EBADF)
316 fd_kill (fd); 839 fd_kill (EV_A_ fd);
317} 840}
318 841
319/* called on ENOMEM in select/poll to kill some fds and retry */ 842/* called on ENOMEM in select/poll to kill some fds and retry */
320static void 843static void noinline
321fd_enomem (void) 844fd_enomem (EV_P)
322{ 845{
323 int fd = anfdmax; 846 int fd;
324 847
325 while (fd--) 848 for (fd = anfdmax; fd--; )
326 if (anfds [fd].events) 849 if (anfds [fd].events)
327 { 850 {
328 close (fd);
329 fd_kill (fd); 851 fd_kill (EV_A_ fd);
330 return; 852 return;
331 } 853 }
332} 854}
333 855
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 }
869}
870
334/*****************************************************************************/ 871/*****************************************************************************/
335 872
336static struct ev_timer **timers; 873/*
337static 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 */
338 878
339static struct ev_periodic **periodics; 879/*
340static 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
341 886
342static void 887#define DHEAP 4
343upheap (WT *timers, int k) 888#define HEAP0 (DHEAP - 1) /* index of first element in heap */
344{ 889#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
345 WT w = timers [k]; 890#define UPHEAP_DONE(p,k) ((p) == (k))
346 891
347 while (k && timers [k >> 1]->at > w->at) 892/* away from the root */
348 { 893inline_speed void
349 timers [k] = timers [k >> 1];
350 timers [k]->active = k + 1;
351 k >>= 1;
352 }
353
354 timers [k] = w;
355 timers [k]->active = k + 1;
356
357}
358
359static void
360downheap (WT *timers, int N, int k) 894downheap (ANHE *heap, int N, int k)
361{ 895{
362 WT w = timers [k]; 896 ANHE he = heap [k];
897 ANHE *E = heap + N + HEAP0;
363 898
364 while (k < (N >> 1)) 899 for (;;)
365 { 900 {
366 int j = k << 1; 901 ev_tstamp minat;
902 ANHE *minpos;
903 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
367 904
368 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 905 /* find minimum child */
906 if (expect_true (pos + DHEAP - 1 < E))
369 ++j; 907 {
370 908 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
371 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
372 break; 921 break;
373 922
374 timers [k] = timers [j]; 923 if (ANHE_at (he) <= minat)
375 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
376 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 (;;)
377 } 979 {
980 int p = HPARENT (k);
378 981
379 timers [k] = w; 982 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
380 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);
381} 1013}
382 1014
383/*****************************************************************************/ 1015/*****************************************************************************/
384 1016
385typedef struct 1017typedef struct
386{ 1018{
387 struct ev_watcher_list *head; 1019 WL head;
388 sig_atomic_t volatile gotsig; 1020 EV_ATOMIC_T gotsig;
389} ANSIG; 1021} ANSIG;
390 1022
391static ANSIG *signals; 1023static ANSIG *signals;
392static int signalmax; 1024static int signalmax;
393 1025
394static int sigpipe [2]; 1026static EV_ATOMIC_T gotsig;
395static sig_atomic_t volatile gotsig; 1027
396static 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}
397 1092
398static void 1093static void
399signals_init (ANSIG *base, int count) 1094pipecb (EV_P_ ev_io *iow, int revents)
400{ 1095{
401 while (count--) 1096#if EV_USE_EVENTFD
1097 if (evfd >= 0)
1098 {
1099 uint64_t counter;
1100 read (evfd, &counter, sizeof (uint64_t));
402 { 1101 }
403 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;
404 base->gotsig = 0; 1112 gotsig = 0;
405 1113
406 ++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)
407 } 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
408} 1133}
1134
1135/*****************************************************************************/
409 1136
410static void 1137static void
411sighandler (int signum) 1138ev_sighandler (int signum)
412{ 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
413 signals [signum - 1].gotsig = 1; 1148 signals [signum - 1].gotsig = 1;
414 1149 evpipe_write (EV_A_ &gotsig);
415 if (!gotsig)
416 {
417 int old_errno = errno;
418 gotsig = 1;
419 write (sigpipe [1], &signum, 1);
420 errno = old_errno;
421 }
422} 1150}
423 1151
424static void 1152void noinline
425sigcb (struct ev_io *iow, int revents) 1153ev_feed_signal_event (EV_P_ int signum)
426{ 1154{
427 struct ev_watcher_list *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
428 int signum; 1161 --signum;
429 1162
430 read (sigpipe [0], &revents, 1); 1163 if (signum < 0 || signum >= signalmax)
431 gotsig = 0; 1164 return;
432 1165
433 for (signum = signalmax; signum--; )
434 if (signals [signum].gotsig)
435 {
436 signals [signum].gotsig = 0; 1166 signals [signum].gotsig = 0;
437 1167
438 for (w = signals [signum].head; w; w = w->next) 1168 for (w = signals [signum].head; w; w = w->next)
439 event ((W)w, EV_SIGNAL); 1169 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
440 }
441}
442
443static void
444siginit (void)
445{
446#ifndef WIN32
447 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
448 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
449
450 /* rather than sort out wether we really need nb, set it */
451 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
452 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
453#endif
454
455 ev_io_set (&sigev, sigpipe [0], EV_READ);
456 ev_io_start (&sigev);
457} 1170}
458 1171
459/*****************************************************************************/ 1172/*****************************************************************************/
460 1173
461static struct ev_idle **idles; 1174static WL childs [EV_PID_HASHSIZE];
462static int idlemax, idlecnt;
463 1175
464static struct ev_prepare **prepares;
465static int preparemax, preparecnt;
466
467static struct ev_check **checks;
468static int checkmax, checkcnt;
469
470/*****************************************************************************/
471
472static struct ev_child *childs [PID_HASHSIZE];
473static struct ev_signal childev;
474
475#ifndef WIN32 1176#ifndef _WIN32
1177
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}
476 1202
477#ifndef WCONTINUED 1203#ifndef WCONTINUED
478# define WCONTINUED 0 1204# define WCONTINUED 0
479#endif 1205#endif
480 1206
481static void 1207static void
482child_reap (struct ev_signal *sw, int chain, int pid, int status)
483{
484 struct ev_child *w;
485
486 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
487 if (w->pid == pid || !w->pid)
488 {
489 w->priority = sw->priority; /* need to do it *now* */
490 w->rpid = pid;
491 w->rstatus = status;
492 event ((W)w, EV_CHILD);
493 }
494}
495
496static void
497childcb (struct ev_signal *sw, int revents) 1208childcb (EV_P_ ev_signal *sw, int revents)
498{ 1209{
499 int pid, status; 1210 int pid, status;
500 1211
1212 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
501 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1213 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
502 { 1214 if (!WCONTINUED
1215 || errno != EINVAL
1216 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1217 return;
1218
503 /* make sure we are called again until all childs have been reaped */ 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 */
504 event ((W)sw, EV_SIGNAL); 1221 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
505 1222
506 child_reap (sw, pid, pid, status); 1223 child_reap (EV_A_ pid, pid, status);
1224 if (EV_PID_HASHSIZE > 1)
507 child_reap (sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1225 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
508 }
509} 1226}
510 1227
511#endif 1228#endif
512 1229
513/*****************************************************************************/ 1230/*****************************************************************************/
514 1231
1232#if EV_USE_PORT
1233# include "ev_port.c"
1234#endif
515#if EV_USE_KQUEUE 1235#if EV_USE_KQUEUE
516# include "ev_kqueue.c" 1236# include "ev_kqueue.c"
517#endif 1237#endif
518#if EV_USE_EPOLL 1238#if EV_USE_EPOLL
519# include "ev_epoll.c" 1239# include "ev_epoll.c"
… …
536{ 1256{
537 return EV_VERSION_MINOR; 1257 return EV_VERSION_MINOR;
538} 1258}
539 1259
540/* return true if we are running with elevated privileges and should ignore env variables */ 1260/* return true if we are running with elevated privileges and should ignore env variables */
541static int 1261int inline_size
542enable_secure () 1262enable_secure (void)
543{ 1263{
544#ifdef WIN32 1264#ifdef _WIN32
545 return 0; 1265 return 0;
546#else 1266#else
547 return getuid () != geteuid () 1267 return getuid () != geteuid ()
548 || getgid () != getegid (); 1268 || getgid () != getegid ();
549#endif 1269#endif
550} 1270}
551 1271
552int ev_init (int methods) 1272unsigned int
1273ev_supported_backends (void)
553{ 1274{
554 if (!ev_method) 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)
555 { 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
556#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)
557 { 1623 {
558 struct timespec ts; 1624 verify_watcher (EV_A_ (W)w);
559 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1625 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
560 have_monotonic = 1; 1626 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
561 } 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)
562#endif 1666# endif
563
564 ev_now = ev_time ();
565 now = get_clock ();
566 now_floor = now;
567 diff = ev_now - now;
568
569 if (pipe (sigpipe))
570 return 0;
571
572 if (methods == EVMETHOD_AUTO)
573 if (!enable_secure () && getenv ("LIBEV_METHODS"))
574 methods = atoi (getenv ("LIBEV_METHODS"));
575 else
576 methods = EVMETHOD_ANY;
577
578 ev_method = 0;
579#if EV_USE_KQUEUE
580 if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);
581#endif 1667#endif
582#if EV_USE_EPOLL 1668}
583 if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);
584#endif
585#if EV_USE_POLL
586 if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);
587#endif
588#if EV_USE_SELECT
589 if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);
590#endif
591 1669
592 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))
593 { 1691 {
594 ev_watcher_init (&sigev, sigcb);
595 ev_set_priority (&sigev, EV_MAXPRI);
596 siginit ();
597
598#ifndef WIN32 1692#ifndef _WIN32
599 ev_signal_init (&childev, childcb, SIGCHLD); 1693 ev_signal_init (&childev, childcb, SIGCHLD);
600 ev_set_priority (&childev, EV_MAXPRI); 1694 ev_set_priority (&childev, EV_MAXPRI);
601 ev_signal_start (&childev); 1695 ev_signal_start (EV_A_ &childev);
1696 ev_unref (EV_A); /* child watcher should not keep loop alive */
602#endif 1697#endif
603 } 1698 }
1699 else
1700 ev_default_loop_ptr = 0;
604 } 1701 }
605 1702
606 return ev_method; 1703 return ev_default_loop_ptr;
1704}
1705
1706void
1707ev_default_destroy (void)
1708{
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 */
607} 1731}
608 1732
609/*****************************************************************************/ 1733/*****************************************************************************/
610 1734
611void 1735void
612ev_fork_prepare (void) 1736ev_invoke (EV_P_ void *w, int revents)
613{ 1737{
614 /* nop */ 1738 EV_CB_INVOKE ((W)w, revents);
615} 1739}
616 1740
617void 1741inline_speed void
618ev_fork_parent (void)
619{
620 /* nop */
621}
622
623void
624ev_fork_child (void)
625{
626#if EV_USE_EPOLL
627 if (ev_method == EVMETHOD_EPOLL)
628 epoll_postfork_child ();
629#endif
630
631 ev_io_stop (&sigev);
632 close (sigpipe [0]);
633 close (sigpipe [1]);
634 pipe (sigpipe);
635 siginit ();
636}
637
638/*****************************************************************************/
639
640static void
641call_pending (void) 1742call_pending (EV_P)
642{ 1743{
643 int pri; 1744 int pri;
644 1745
645 for (pri = NUMPRI; pri--; ) 1746 for (pri = NUMPRI; pri--; )
646 while (pendingcnt [pri]) 1747 while (pendingcnt [pri])
647 { 1748 {
648 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1749 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
649 1750
650 if (p->w) 1751 if (expect_true (p->w))
651 { 1752 {
1753 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1754
652 p->w->pending = 0; 1755 p->w->pending = 0;
653 p->w->cb (p->w, p->events); 1756 EV_CB_INVOKE (p->w, p->events);
1757 EV_FREQUENT_CHECK;
654 } 1758 }
655 } 1759 }
656} 1760}
657 1761
658static void 1762#if EV_IDLE_ENABLE
659timers_reify (void) 1763inline_size void
1764idle_reify (EV_P)
660{ 1765{
661 while (timercnt && timers [0]->at <= now) 1766 if (expect_false (idleall))
662 { 1767 {
663 struct ev_timer *w = timers [0]; 1768 int pri;
664 1769
665 /* first reschedule or stop timer */ 1770 for (pri = NUMPRI; pri--; )
666 if (w->repeat)
667 { 1771 {
668 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1772 if (pendingcnt [pri])
669 w->at = now + w->repeat; 1773 break;
670 downheap ((WT *)timers, timercnt, 0);
671 }
672 else
673 ev_timer_stop (w); /* nonrepeating: stop timer */
674 1774
675 event ((W)w, EV_TIMEOUT); 1775 if (idlecnt [pri])
676 }
677}
678
679static void
680periodics_reify (void)
681{
682 while (periodiccnt && periodics [0]->at <= ev_now)
683 {
684 struct ev_periodic *w = periodics [0];
685
686 /* first reschedule or stop timer */
687 if (w->interval)
688 {
689 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;
690 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));
691 downheap ((WT *)periodics, periodiccnt, 0);
692 }
693 else
694 ev_periodic_stop (w); /* nonrepeating: stop timer */
695
696 event ((W)w, EV_PERIODIC);
697 }
698}
699
700static void
701periodics_reschedule (ev_tstamp diff)
702{
703 int i;
704
705 /* adjust periodics after time jump */
706 for (i = 0; i < periodiccnt; ++i)
707 {
708 struct ev_periodic *w = periodics [i];
709
710 if (w->interval)
711 {
712 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
713
714 if (fabs (diff) >= 1e-4)
715 { 1776 {
716 ev_periodic_stop (w); 1777 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
717 ev_periodic_start (w); 1778 break;
718
719 i = 0; /* restart loop, inefficient, but time jumps should be rare */
720 } 1779 }
721 } 1780 }
722 } 1781 }
723} 1782}
1783#endif
724 1784
725static int 1785inline_size void
726time_update_monotonic (void) 1786timers_reify (EV_P)
727{ 1787{
728 now = get_clock (); 1788 EV_FREQUENT_CHECK;
729 1789
730 if (expect_true (now - now_floor < MIN_TIMEJUMP * .5)) 1790 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
731 {
732 ev_now = now + diff;
733 return 0;
734 } 1791 {
735 else 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);
736 { 1819 }
737 now_floor = now; 1820}
738 ev_now = ev_time (); 1821
739 return 1; 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)
740 } 1829 {
741} 1830 int feed_count = 0;
742 1831
743static void 1832 do
744time_update (void) 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)
1881{
1882 int i;
1883
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]);
1888
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]);
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)
745{ 1916{
746 int i; 1917 int i;
747 1918
748#if EV_USE_MONOTONIC 1919#if EV_USE_MONOTONIC
749 if (expect_true (have_monotonic)) 1920 if (expect_true (have_monotonic))
750 { 1921 {
751 if (time_update_monotonic ()) 1922 ev_tstamp odiff = rtmn_diff;
1923
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))
752 { 1929 {
753 ev_tstamp odiff = diff; 1930 ev_rt_now = rtmn_diff + mn_now;
754 1931 return;
755 for (i = 4; --i; ) /* loop a few times, before making important decisions */
756 {
757 diff = ev_now - now;
758
759 if (fabs (odiff - diff) < MIN_TIMEJUMP)
760 return; /* all is well */
761
762 ev_now = ev_time ();
763 now = get_clock ();
764 now_floor = now;
765 }
766
767 periodics_reschedule (diff - odiff);
768 /* no timer adjustment, as the monotonic clock doesn't jump */
769 } 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 {
1947 rtmn_diff = ev_rt_now - mn_now;
1948
1949 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1950 return; /* all is well */
1951
1952 ev_rt_now = ev_time ();
1953 mn_now = get_clock ();
1954 now_floor = mn_now;
1955 }
1956
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
770 } 1962 }
771 else 1963 else
772#endif 1964#endif
773 { 1965 {
774 ev_now = ev_time (); 1966 ev_rt_now = ev_time ();
775 1967
776 if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 1968 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
777 { 1969 {
778 periodics_reschedule (ev_now - now);
779
780 /* 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 */
781 for (i = 0; i < timercnt; ++i) 1971 timers_reschedule (EV_A_ ev_rt_now - mn_now);
782 timers [i]->at += diff; 1972#if EV_PERIODIC_ENABLE
1973 periodics_reschedule (EV_A);
1974#endif
783 } 1975 }
784 1976
785 now = ev_now; 1977 mn_now = ev_rt_now;
786 } 1978 }
787} 1979}
788 1980
789int ev_loop_done; 1981static int loop_done;
790 1982
1983void
791void ev_loop (int flags) 1984ev_loop (EV_P_ int flags)
792{ 1985{
793 double block; 1986 loop_done = EVUNLOOP_CANCEL;
794 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 */
795 1989
796 do 1990 do
797 { 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
798 /* queue check watchers (and execute them) */ 2015 /* queue prepare watchers (and execute them) */
799 if (expect_false (preparecnt)) 2016 if (expect_false (preparecnt))
800 { 2017 {
801 queue_events ((W *)prepares, preparecnt, EV_PREPARE); 2018 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
802 call_pending (); 2019 call_pending (EV_A);
803 } 2020 }
804 2021
2022 /* we might have forked, so reify kernel state if necessary */
2023 if (expect_false (postfork))
2024 loop_fork (EV_A);
2025
805 /* update fd-related kernel structures */ 2026 /* update fd-related kernel structures */
806 fd_reify (); 2027 fd_reify (EV_A);
807 2028
808 /* calculate blocking time */ 2029 /* calculate blocking time */
2030 {
2031 ev_tstamp waittime = 0.;
2032 ev_tstamp sleeptime = 0.;
809 2033
810 /* we only need this for !monotonic clockor timers, but as we basically 2034 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
811 always have timers, we just calculate it always */
812#if EV_USE_MONOTONIC
813 if (expect_true (have_monotonic))
814 time_update_monotonic ();
815 else
816#endif
817 { 2035 {
818 ev_now = ev_time (); 2036 /* update time to cancel out callback processing overhead */
819 now = ev_now; 2037 time_update (EV_A_ 1e100);
820 }
821 2038
822 if (flags & EVLOOP_NONBLOCK || idlecnt)
823 block = 0.;
824 else
825 {
826 block = MAX_BLOCKTIME;
827
828 if (timercnt) 2039 if (timercnt)
829 { 2040 {
830 ev_tstamp to = timers [0]->at - now + method_fudge; 2041 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
831 if (block > to) block = to; 2042 if (waittime > to) waittime = to;
832 } 2043 }
833 2044
2045#if EV_PERIODIC_ENABLE
834 if (periodiccnt) 2046 if (periodiccnt)
835 { 2047 {
836 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 2048 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
837 if (block > to) block = to; 2049 if (waittime > to) waittime = to;
838 } 2050 }
2051#endif
839 2052
840 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 }
841 } 2066 }
842 2067
843 method_poll (block); 2068 ++loop_count;
2069 backend_poll (EV_A_ waittime);
844 2070
845 /* update ev_now, do magic */ 2071 /* update ev_rt_now, do magic */
846 time_update (); 2072 time_update (EV_A_ waittime + sleeptime);
2073 }
847 2074
848 /* queue pending timers and reschedule them */ 2075 /* queue pending timers and reschedule them */
849 timers_reify (); /* relative timers called last */ 2076 timers_reify (EV_A); /* relative timers called last */
2077#if EV_PERIODIC_ENABLE
850 periodics_reify (); /* absolute timers called first */ 2078 periodics_reify (EV_A); /* absolute timers called first */
2079#endif
851 2080
2081#if EV_IDLE_ENABLE
852 /* queue idle watchers unless io or timers are pending */ 2082 /* queue idle watchers unless other events are pending */
853 if (!pendingcnt) 2083 idle_reify (EV_A);
854 queue_events ((W *)idles, idlecnt, EV_IDLE); 2084#endif
855 2085
856 /* queue check watchers, to be executed first */ 2086 /* queue check watchers, to be executed first */
857 if (checkcnt) 2087 if (expect_false (checkcnt))
858 queue_events ((W *)checks, checkcnt, EV_CHECK); 2088 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
859 2089
860 call_pending (); 2090 call_pending (EV_A);
861 } 2091 }
862 while (!ev_loop_done); 2092 while (expect_true (
2093 activecnt
2094 && !loop_done
2095 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2096 ));
863 2097
864 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{
865 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 timers_reschedule (EV_A_ mn_now - mn_prev);
2139#if EV_PERIODIC_ENABLE
2140 periodics_reschedule (EV_A);
2141#endif
866} 2142}
867 2143
868/*****************************************************************************/ 2144/*****************************************************************************/
869 2145
870static void 2146inline_size void
871wlist_add (WL *head, WL elem) 2147wlist_add (WL *head, WL elem)
872{ 2148{
873 elem->next = *head; 2149 elem->next = *head;
874 *head = elem; 2150 *head = elem;
875} 2151}
876 2152
877static void 2153inline_size void
878wlist_del (WL *head, WL elem) 2154wlist_del (WL *head, WL elem)
879{ 2155{
880 while (*head) 2156 while (*head)
881 { 2157 {
882 if (*head == elem) 2158 if (*head == elem)
… …
887 2163
888 head = &(*head)->next; 2164 head = &(*head)->next;
889 } 2165 }
890} 2166}
891 2167
892static void 2168inline_speed void
893ev_clear_pending (W w) 2169clear_pending (EV_P_ W w)
894{ 2170{
895 if (w->pending) 2171 if (w->pending)
896 { 2172 {
897 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2173 pendings [ABSPRI (w)][w->pending - 1].w = 0;
898 w->pending = 0; 2174 w->pending = 0;
899 } 2175 }
900} 2176}
901 2177
902static void 2178int
2179ev_clear_pending (EV_P_ void *w)
2180{
2181 W w_ = (W)w;
2182 int pending = w_->pending;
2183
2184 if (expect_true (pending))
2185 {
2186 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2187 w_->pending = 0;
2188 p->w = 0;
2189 return p->events;
2190 }
2191 else
2192 return 0;
2193}
2194
2195inline_size void
2196pri_adjust (EV_P_ W w)
2197{
2198 int pri = w->priority;
2199 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2200 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2201 w->priority = pri;
2202}
2203
2204inline_speed void
903ev_start (W w, int active) 2205ev_start (EV_P_ W w, int active)
904{ 2206{
905 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2207 pri_adjust (EV_A_ w);
906 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
907
908 w->active = active; 2208 w->active = active;
2209 ev_ref (EV_A);
909} 2210}
910 2211
911static void 2212inline_size void
912ev_stop (W w) 2213ev_stop (EV_P_ W w)
913{ 2214{
2215 ev_unref (EV_A);
914 w->active = 0; 2216 w->active = 0;
915} 2217}
916 2218
917/*****************************************************************************/ 2219/*****************************************************************************/
918 2220
919void 2221void noinline
920ev_io_start (struct ev_io *w) 2222ev_io_start (EV_P_ ev_io *w)
921{ 2223{
922 int fd = w->fd; 2224 int fd = w->fd;
923 2225
924 if (ev_is_active (w)) 2226 if (expect_false (ev_is_active (w)))
925 return; 2227 return;
926 2228
927 assert (("ev_io_start called with negative fd", fd >= 0)); 2229 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2230 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
928 2231
2232 EV_FREQUENT_CHECK;
2233
929 ev_start ((W)w, 1); 2234 ev_start (EV_A_ (W)w, 1);
930 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2235 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
931 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2236 wlist_add (&anfds[fd].head, (WL)w);
932 2237
933 fd_change (fd); 2238 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
934} 2239 w->events &= ~EV__IOFDSET;
935 2240
936void 2241 EV_FREQUENT_CHECK;
2242}
2243
2244void noinline
937ev_io_stop (struct ev_io *w) 2245ev_io_stop (EV_P_ ev_io *w)
938{ 2246{
939 ev_clear_pending ((W)w); 2247 clear_pending (EV_A_ (W)w);
940 if (!ev_is_active (w)) 2248 if (expect_false (!ev_is_active (w)))
941 return; 2249 return;
942 2250
2251 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2252
2253 EV_FREQUENT_CHECK;
2254
943 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2255 wlist_del (&anfds[w->fd].head, (WL)w);
944 ev_stop ((W)w); 2256 ev_stop (EV_A_ (W)w);
945 2257
946 fd_change (w->fd); 2258 fd_change (EV_A_ w->fd, 1);
947}
948 2259
949void 2260 EV_FREQUENT_CHECK;
2261}
2262
2263void noinline
950ev_timer_start (struct ev_timer *w) 2264ev_timer_start (EV_P_ ev_timer *w)
951{ 2265{
952 if (ev_is_active (w)) 2266 if (expect_false (ev_is_active (w)))
953 return; 2267 return;
954 2268
955 w->at += now; 2269 ev_at (w) += mn_now;
956 2270
957 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2271 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
958 2272
959 ev_start ((W)w, ++timercnt); 2273 EV_FREQUENT_CHECK;
960 array_needsize (timers, timermax, timercnt, );
961 timers [timercnt - 1] = w;
962 upheap ((WT *)timers, timercnt - 1);
963}
964 2274
965void 2275 ++timercnt;
2276 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2277 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2278 ANHE_w (timers [ev_active (w)]) = (WT)w;
2279 ANHE_at_cache (timers [ev_active (w)]);
2280 upheap (timers, ev_active (w));
2281
2282 EV_FREQUENT_CHECK;
2283
2284 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2285}
2286
2287void noinline
966ev_timer_stop (struct ev_timer *w) 2288ev_timer_stop (EV_P_ ev_timer *w)
967{ 2289{
968 ev_clear_pending ((W)w); 2290 clear_pending (EV_A_ (W)w);
969 if (!ev_is_active (w)) 2291 if (expect_false (!ev_is_active (w)))
970 return; 2292 return;
971 2293
972 if (w->active < timercnt--) 2294 EV_FREQUENT_CHECK;
2295
2296 {
2297 int active = ev_active (w);
2298
2299 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2300
2301 --timercnt;
2302
2303 if (expect_true (active < timercnt + HEAP0))
973 { 2304 {
974 timers [w->active - 1] = timers [timercnt]; 2305 timers [active] = timers [timercnt + HEAP0];
975 downheap ((WT *)timers, timercnt, w->active - 1); 2306 adjustheap (timers, timercnt, active);
976 } 2307 }
2308 }
977 2309
978 w->at = w->repeat; 2310 EV_FREQUENT_CHECK;
979 2311
2312 ev_at (w) -= mn_now;
2313
980 ev_stop ((W)w); 2314 ev_stop (EV_A_ (W)w);
981} 2315}
982 2316
983void 2317void noinline
984ev_timer_again (struct ev_timer *w) 2318ev_timer_again (EV_P_ ev_timer *w)
985{ 2319{
2320 EV_FREQUENT_CHECK;
2321
986 if (ev_is_active (w)) 2322 if (ev_is_active (w))
987 { 2323 {
988 if (w->repeat) 2324 if (w->repeat)
989 { 2325 {
990 w->at = now + w->repeat; 2326 ev_at (w) = mn_now + w->repeat;
2327 ANHE_at_cache (timers [ev_active (w)]);
991 downheap ((WT *)timers, timercnt, w->active - 1); 2328 adjustheap (timers, timercnt, ev_active (w));
992 } 2329 }
993 else 2330 else
994 ev_timer_stop (w); 2331 ev_timer_stop (EV_A_ w);
995 } 2332 }
996 else if (w->repeat) 2333 else if (w->repeat)
2334 {
2335 ev_at (w) = w->repeat;
997 ev_timer_start (w); 2336 ev_timer_start (EV_A_ w);
998} 2337 }
999 2338
1000void 2339 EV_FREQUENT_CHECK;
2340}
2341
2342#if EV_PERIODIC_ENABLE
2343void noinline
1001ev_periodic_start (struct ev_periodic *w) 2344ev_periodic_start (EV_P_ ev_periodic *w)
1002{ 2345{
1003 if (ev_is_active (w)) 2346 if (expect_false (ev_is_active (w)))
1004 return; 2347 return;
1005 2348
2349 if (w->reschedule_cb)
2350 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2351 else if (w->interval)
2352 {
1006 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2353 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1007
1008 /* this formula differs from the one in periodic_reify because we do not always round up */ 2354 /* this formula differs from the one in periodic_reify because we do not always round up */
1009 if (w->interval)
1010 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 2355 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2356 }
2357 else
2358 ev_at (w) = w->offset;
1011 2359
2360 EV_FREQUENT_CHECK;
2361
2362 ++periodiccnt;
1012 ev_start ((W)w, ++periodiccnt); 2363 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1013 array_needsize (periodics, periodicmax, periodiccnt, ); 2364 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1014 periodics [periodiccnt - 1] = w; 2365 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1015 upheap ((WT *)periodics, periodiccnt - 1); 2366 ANHE_at_cache (periodics [ev_active (w)]);
1016} 2367 upheap (periodics, ev_active (w));
1017 2368
1018void 2369 EV_FREQUENT_CHECK;
2370
2371 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2372}
2373
2374void noinline
1019ev_periodic_stop (struct ev_periodic *w) 2375ev_periodic_stop (EV_P_ ev_periodic *w)
1020{ 2376{
1021 ev_clear_pending ((W)w); 2377 clear_pending (EV_A_ (W)w);
1022 if (!ev_is_active (w)) 2378 if (expect_false (!ev_is_active (w)))
1023 return; 2379 return;
1024 2380
1025 if (w->active < periodiccnt--) 2381 EV_FREQUENT_CHECK;
2382
2383 {
2384 int active = ev_active (w);
2385
2386 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2387
2388 --periodiccnt;
2389
2390 if (expect_true (active < periodiccnt + HEAP0))
1026 { 2391 {
1027 periodics [w->active - 1] = periodics [periodiccnt]; 2392 periodics [active] = periodics [periodiccnt + HEAP0];
1028 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2393 adjustheap (periodics, periodiccnt, active);
1029 } 2394 }
2395 }
1030 2396
2397 EV_FREQUENT_CHECK;
2398
1031 ev_stop ((W)w); 2399 ev_stop (EV_A_ (W)w);
1032} 2400}
2401
2402void noinline
2403ev_periodic_again (EV_P_ ev_periodic *w)
2404{
2405 /* TODO: use adjustheap and recalculation */
2406 ev_periodic_stop (EV_A_ w);
2407 ev_periodic_start (EV_A_ w);
2408}
2409#endif
1033 2410
1034#ifndef SA_RESTART 2411#ifndef SA_RESTART
1035# define SA_RESTART 0 2412# define SA_RESTART 0
1036#endif 2413#endif
1037 2414
1038void 2415void noinline
1039ev_signal_start (struct ev_signal *w) 2416ev_signal_start (EV_P_ ev_signal *w)
1040{ 2417{
2418#if EV_MULTIPLICITY
2419 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2420#endif
1041 if (ev_is_active (w)) 2421 if (expect_false (ev_is_active (w)))
1042 return; 2422 return;
1043 2423
1044 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2424 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
1045 2425
2426 evpipe_init (EV_A);
2427
2428 EV_FREQUENT_CHECK;
2429
2430 {
2431#ifndef _WIN32
2432 sigset_t full, prev;
2433 sigfillset (&full);
2434 sigprocmask (SIG_SETMASK, &full, &prev);
2435#endif
2436
2437 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2438
2439#ifndef _WIN32
2440 sigprocmask (SIG_SETMASK, &prev, 0);
2441#endif
2442 }
2443
1046 ev_start ((W)w, 1); 2444 ev_start (EV_A_ (W)w, 1);
1047 array_needsize (signals, signalmax, w->signum, signals_init);
1048 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2445 wlist_add (&signals [w->signum - 1].head, (WL)w);
1049 2446
1050 if (!w->next) 2447 if (!((WL)w)->next)
1051 { 2448 {
2449#if _WIN32
2450 signal (w->signum, ev_sighandler);
2451#else
1052 struct sigaction sa; 2452 struct sigaction sa;
1053 sa.sa_handler = sighandler; 2453 sa.sa_handler = ev_sighandler;
1054 sigfillset (&sa.sa_mask); 2454 sigfillset (&sa.sa_mask);
1055 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2455 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1056 sigaction (w->signum, &sa, 0); 2456 sigaction (w->signum, &sa, 0);
2457#endif
1057 } 2458 }
1058}
1059 2459
1060void 2460 EV_FREQUENT_CHECK;
2461}
2462
2463void noinline
1061ev_signal_stop (struct ev_signal *w) 2464ev_signal_stop (EV_P_ ev_signal *w)
1062{ 2465{
1063 ev_clear_pending ((W)w); 2466 clear_pending (EV_A_ (W)w);
1064 if (!ev_is_active (w)) 2467 if (expect_false (!ev_is_active (w)))
1065 return; 2468 return;
1066 2469
2470 EV_FREQUENT_CHECK;
2471
1067 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2472 wlist_del (&signals [w->signum - 1].head, (WL)w);
1068 ev_stop ((W)w); 2473 ev_stop (EV_A_ (W)w);
1069 2474
1070 if (!signals [w->signum - 1].head) 2475 if (!signals [w->signum - 1].head)
1071 signal (w->signum, SIG_DFL); 2476 signal (w->signum, SIG_DFL);
1072}
1073 2477
2478 EV_FREQUENT_CHECK;
2479}
2480
1074void 2481void
1075ev_idle_start (struct ev_idle *w) 2482ev_child_start (EV_P_ ev_child *w)
1076{ 2483{
2484#if EV_MULTIPLICITY
2485 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2486#endif
1077 if (ev_is_active (w)) 2487 if (expect_false (ev_is_active (w)))
1078 return; 2488 return;
1079 2489
1080 ev_start ((W)w, ++idlecnt); 2490 EV_FREQUENT_CHECK;
1081 array_needsize (idles, idlemax, idlecnt, );
1082 idles [idlecnt - 1] = w;
1083}
1084 2491
2492 ev_start (EV_A_ (W)w, 1);
2493 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2494
2495 EV_FREQUENT_CHECK;
2496}
2497
1085void 2498void
1086ev_idle_stop (struct ev_idle *w) 2499ev_child_stop (EV_P_ ev_child *w)
1087{ 2500{
1088 ev_clear_pending ((W)w); 2501 clear_pending (EV_A_ (W)w);
1089 if (ev_is_active (w)) 2502 if (expect_false (!ev_is_active (w)))
1090 return; 2503 return;
1091 2504
1092 idles [w->active - 1] = idles [--idlecnt]; 2505 EV_FREQUENT_CHECK;
2506
2507 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1093 ev_stop ((W)w); 2508 ev_stop (EV_A_ (W)w);
1094}
1095 2509
1096void 2510 EV_FREQUENT_CHECK;
1097ev_prepare_start (struct ev_prepare *w) 2511}
2512
2513#if EV_STAT_ENABLE
2514
2515# ifdef _WIN32
2516# undef lstat
2517# define lstat(a,b) _stati64 (a,b)
2518# endif
2519
2520#define DEF_STAT_INTERVAL 5.0074891
2521#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2522#define MIN_STAT_INTERVAL 0.1074891
2523
2524static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2525
2526#if EV_USE_INOTIFY
2527# define EV_INOTIFY_BUFSIZE 8192
2528
2529static void noinline
2530infy_add (EV_P_ ev_stat *w)
1098{ 2531{
1099 if (ev_is_active (w)) 2532 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);
2533
2534 if (w->wd < 0)
2535 {
2536 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2537 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2538
2539 /* monitor some parent directory for speedup hints */
2540 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2541 /* but an efficiency issue only */
2542 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2543 {
2544 char path [4096];
2545 strcpy (path, w->path);
2546
2547 do
2548 {
2549 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2550 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2551
2552 char *pend = strrchr (path, '/');
2553
2554 if (!pend || pend == path)
2555 break;
2556
2557 *pend = 0;
2558 w->wd = inotify_add_watch (fs_fd, path, mask);
2559 }
2560 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2561 }
2562 }
2563
2564 if (w->wd >= 0)
2565 {
2566 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2567
2568 /* now local changes will be tracked by inotify, but remote changes won't */
2569 /* unless the filesystem it known to be local, we therefore still poll */
2570 /* also do poll on <2.6.25, but with normal frequency */
2571 struct statfs sfs;
2572
2573 if (fs_2625 && !statfs (w->path, &sfs))
2574 if (sfs.f_type == 0x1373 /* devfs */
2575 || sfs.f_type == 0xEF53 /* ext2/3 */
2576 || sfs.f_type == 0x3153464a /* jfs */
2577 || sfs.f_type == 0x52654973 /* reiser3 */
2578 || sfs.f_type == 0x01021994 /* tempfs */
2579 || sfs.f_type == 0x58465342 /* xfs */)
2580 return;
2581
2582 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2583 ev_timer_again (EV_A_ &w->timer);
2584 }
2585}
2586
2587static void noinline
2588infy_del (EV_P_ ev_stat *w)
2589{
2590 int slot;
2591 int wd = w->wd;
2592
2593 if (wd < 0)
1100 return; 2594 return;
1101 2595
2596 w->wd = -2;
2597 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2598 wlist_del (&fs_hash [slot].head, (WL)w);
2599
2600 /* remove this watcher, if others are watching it, they will rearm */
2601 inotify_rm_watch (fs_fd, wd);
2602}
2603
2604static void noinline
2605infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2606{
2607 if (slot < 0)
2608 /* overflow, need to check for all hash slots */
2609 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2610 infy_wd (EV_A_ slot, wd, ev);
2611 else
2612 {
2613 WL w_;
2614
2615 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2616 {
2617 ev_stat *w = (ev_stat *)w_;
2618 w_ = w_->next; /* lets us remove this watcher and all before it */
2619
2620 if (w->wd == wd || wd == -1)
2621 {
2622 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2623 {
2624 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2625 w->wd = -1;
2626 infy_add (EV_A_ w); /* re-add, no matter what */
2627 }
2628
2629 stat_timer_cb (EV_A_ &w->timer, 0);
2630 }
2631 }
2632 }
2633}
2634
2635static void
2636infy_cb (EV_P_ ev_io *w, int revents)
2637{
2638 char buf [EV_INOTIFY_BUFSIZE];
2639 struct inotify_event *ev = (struct inotify_event *)buf;
2640 int ofs;
2641 int len = read (fs_fd, buf, sizeof (buf));
2642
2643 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2644 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2645}
2646
2647inline_size void
2648check_2625 (EV_P)
2649{
2650 /* kernels < 2.6.25 are borked
2651 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2652 */
2653 struct utsname buf;
2654 int major, minor, micro;
2655
2656 if (uname (&buf))
2657 return;
2658
2659 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2660 return;
2661
2662 if (major < 2
2663 || (major == 2 && minor < 6)
2664 || (major == 2 && minor == 6 && micro < 25))
2665 return;
2666
2667 fs_2625 = 1;
2668}
2669
2670inline_size void
2671infy_init (EV_P)
2672{
2673 if (fs_fd != -2)
2674 return;
2675
2676 fs_fd = -1;
2677
2678 check_2625 (EV_A);
2679
2680 fs_fd = inotify_init ();
2681
2682 if (fs_fd >= 0)
2683 {
2684 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2685 ev_set_priority (&fs_w, EV_MAXPRI);
2686 ev_io_start (EV_A_ &fs_w);
2687 }
2688}
2689
2690inline_size void
2691infy_fork (EV_P)
2692{
2693 int slot;
2694
2695 if (fs_fd < 0)
2696 return;
2697
2698 close (fs_fd);
2699 fs_fd = inotify_init ();
2700
2701 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2702 {
2703 WL w_ = fs_hash [slot].head;
2704 fs_hash [slot].head = 0;
2705
2706 while (w_)
2707 {
2708 ev_stat *w = (ev_stat *)w_;
2709 w_ = w_->next; /* lets us add this watcher */
2710
2711 w->wd = -1;
2712
2713 if (fs_fd >= 0)
2714 infy_add (EV_A_ w); /* re-add, no matter what */
2715 else
2716 ev_timer_again (EV_A_ &w->timer);
2717 }
2718 }
2719}
2720
2721#endif
2722
2723#ifdef _WIN32
2724# define EV_LSTAT(p,b) _stati64 (p, b)
2725#else
2726# define EV_LSTAT(p,b) lstat (p, b)
2727#endif
2728
2729void
2730ev_stat_stat (EV_P_ ev_stat *w)
2731{
2732 if (lstat (w->path, &w->attr) < 0)
2733 w->attr.st_nlink = 0;
2734 else if (!w->attr.st_nlink)
2735 w->attr.st_nlink = 1;
2736}
2737
2738static void noinline
2739stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2740{
2741 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2742
2743 /* we copy this here each the time so that */
2744 /* prev has the old value when the callback gets invoked */
2745 w->prev = w->attr;
2746 ev_stat_stat (EV_A_ w);
2747
2748 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2749 if (
2750 w->prev.st_dev != w->attr.st_dev
2751 || w->prev.st_ino != w->attr.st_ino
2752 || w->prev.st_mode != w->attr.st_mode
2753 || w->prev.st_nlink != w->attr.st_nlink
2754 || w->prev.st_uid != w->attr.st_uid
2755 || w->prev.st_gid != w->attr.st_gid
2756 || w->prev.st_rdev != w->attr.st_rdev
2757 || w->prev.st_size != w->attr.st_size
2758 || w->prev.st_atime != w->attr.st_atime
2759 || w->prev.st_mtime != w->attr.st_mtime
2760 || w->prev.st_ctime != w->attr.st_ctime
2761 ) {
2762 #if EV_USE_INOTIFY
2763 if (fs_fd >= 0)
2764 {
2765 infy_del (EV_A_ w);
2766 infy_add (EV_A_ w);
2767 ev_stat_stat (EV_A_ w); /* avoid race... */
2768 }
2769 #endif
2770
2771 ev_feed_event (EV_A_ w, EV_STAT);
2772 }
2773}
2774
2775void
2776ev_stat_start (EV_P_ ev_stat *w)
2777{
2778 if (expect_false (ev_is_active (w)))
2779 return;
2780
2781 ev_stat_stat (EV_A_ w);
2782
2783 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2784 w->interval = MIN_STAT_INTERVAL;
2785
2786 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2787 ev_set_priority (&w->timer, ev_priority (w));
2788
2789#if EV_USE_INOTIFY
2790 infy_init (EV_A);
2791
2792 if (fs_fd >= 0)
2793 infy_add (EV_A_ w);
2794 else
2795#endif
2796 ev_timer_again (EV_A_ &w->timer);
2797
2798 ev_start (EV_A_ (W)w, 1);
2799
2800 EV_FREQUENT_CHECK;
2801}
2802
2803void
2804ev_stat_stop (EV_P_ ev_stat *w)
2805{
2806 clear_pending (EV_A_ (W)w);
2807 if (expect_false (!ev_is_active (w)))
2808 return;
2809
2810 EV_FREQUENT_CHECK;
2811
2812#if EV_USE_INOTIFY
2813 infy_del (EV_A_ w);
2814#endif
2815 ev_timer_stop (EV_A_ &w->timer);
2816
2817 ev_stop (EV_A_ (W)w);
2818
2819 EV_FREQUENT_CHECK;
2820}
2821#endif
2822
2823#if EV_IDLE_ENABLE
2824void
2825ev_idle_start (EV_P_ ev_idle *w)
2826{
2827 if (expect_false (ev_is_active (w)))
2828 return;
2829
2830 pri_adjust (EV_A_ (W)w);
2831
2832 EV_FREQUENT_CHECK;
2833
2834 {
2835 int active = ++idlecnt [ABSPRI (w)];
2836
2837 ++idleall;
2838 ev_start (EV_A_ (W)w, active);
2839
2840 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2841 idles [ABSPRI (w)][active - 1] = w;
2842 }
2843
2844 EV_FREQUENT_CHECK;
2845}
2846
2847void
2848ev_idle_stop (EV_P_ ev_idle *w)
2849{
2850 clear_pending (EV_A_ (W)w);
2851 if (expect_false (!ev_is_active (w)))
2852 return;
2853
2854 EV_FREQUENT_CHECK;
2855
2856 {
2857 int active = ev_active (w);
2858
2859 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2860 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2861
2862 ev_stop (EV_A_ (W)w);
2863 --idleall;
2864 }
2865
2866 EV_FREQUENT_CHECK;
2867}
2868#endif
2869
2870void
2871ev_prepare_start (EV_P_ ev_prepare *w)
2872{
2873 if (expect_false (ev_is_active (w)))
2874 return;
2875
2876 EV_FREQUENT_CHECK;
2877
1102 ev_start ((W)w, ++preparecnt); 2878 ev_start (EV_A_ (W)w, ++preparecnt);
1103 array_needsize (prepares, preparemax, preparecnt, ); 2879 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1104 prepares [preparecnt - 1] = w; 2880 prepares [preparecnt - 1] = w;
1105}
1106 2881
2882 EV_FREQUENT_CHECK;
2883}
2884
1107void 2885void
1108ev_prepare_stop (struct ev_prepare *w) 2886ev_prepare_stop (EV_P_ ev_prepare *w)
1109{ 2887{
1110 ev_clear_pending ((W)w); 2888 clear_pending (EV_A_ (W)w);
1111 if (ev_is_active (w)) 2889 if (expect_false (!ev_is_active (w)))
1112 return; 2890 return;
1113 2891
2892 EV_FREQUENT_CHECK;
2893
2894 {
2895 int active = ev_active (w);
2896
1114 prepares [w->active - 1] = prepares [--preparecnt]; 2897 prepares [active - 1] = prepares [--preparecnt];
2898 ev_active (prepares [active - 1]) = active;
2899 }
2900
1115 ev_stop ((W)w); 2901 ev_stop (EV_A_ (W)w);
1116}
1117 2902
2903 EV_FREQUENT_CHECK;
2904}
2905
1118void 2906void
1119ev_check_start (struct ev_check *w) 2907ev_check_start (EV_P_ ev_check *w)
1120{ 2908{
1121 if (ev_is_active (w)) 2909 if (expect_false (ev_is_active (w)))
1122 return; 2910 return;
1123 2911
2912 EV_FREQUENT_CHECK;
2913
1124 ev_start ((W)w, ++checkcnt); 2914 ev_start (EV_A_ (W)w, ++checkcnt);
1125 array_needsize (checks, checkmax, checkcnt, ); 2915 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1126 checks [checkcnt - 1] = w; 2916 checks [checkcnt - 1] = w;
1127}
1128 2917
2918 EV_FREQUENT_CHECK;
2919}
2920
1129void 2921void
1130ev_check_stop (struct ev_check *w) 2922ev_check_stop (EV_P_ ev_check *w)
1131{ 2923{
1132 ev_clear_pending ((W)w); 2924 clear_pending (EV_A_ (W)w);
1133 if (ev_is_active (w)) 2925 if (expect_false (!ev_is_active (w)))
1134 return; 2926 return;
1135 2927
2928 EV_FREQUENT_CHECK;
2929
2930 {
2931 int active = ev_active (w);
2932
1136 checks [w->active - 1] = checks [--checkcnt]; 2933 checks [active - 1] = checks [--checkcnt];
2934 ev_active (checks [active - 1]) = active;
2935 }
2936
1137 ev_stop ((W)w); 2937 ev_stop (EV_A_ (W)w);
1138}
1139 2938
1140void 2939 EV_FREQUENT_CHECK;
1141ev_child_start (struct ev_child *w) 2940}
2941
2942#if EV_EMBED_ENABLE
2943void noinline
2944ev_embed_sweep (EV_P_ ev_embed *w)
1142{ 2945{
2946 ev_loop (w->other, EVLOOP_NONBLOCK);
2947}
2948
2949static void
2950embed_io_cb (EV_P_ ev_io *io, int revents)
2951{
2952 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2953
1143 if (ev_is_active (w)) 2954 if (ev_cb (w))
2955 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2956 else
2957 ev_loop (w->other, EVLOOP_NONBLOCK);
2958}
2959
2960static void
2961embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2962{
2963 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2964
2965 {
2966 struct ev_loop *loop = w->other;
2967
2968 while (fdchangecnt)
2969 {
2970 fd_reify (EV_A);
2971 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2972 }
2973 }
2974}
2975
2976static void
2977embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2978{
2979 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2980
2981 ev_embed_stop (EV_A_ w);
2982
2983 {
2984 struct ev_loop *loop = w->other;
2985
2986 ev_loop_fork (EV_A);
2987 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2988 }
2989
2990 ev_embed_start (EV_A_ w);
2991}
2992
2993#if 0
2994static void
2995embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2996{
2997 ev_idle_stop (EV_A_ idle);
2998}
2999#endif
3000
3001void
3002ev_embed_start (EV_P_ ev_embed *w)
3003{
3004 if (expect_false (ev_is_active (w)))
1144 return; 3005 return;
1145 3006
3007 {
3008 struct ev_loop *loop = w->other;
3009 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3010 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3011 }
3012
3013 EV_FREQUENT_CHECK;
3014
3015 ev_set_priority (&w->io, ev_priority (w));
3016 ev_io_start (EV_A_ &w->io);
3017
3018 ev_prepare_init (&w->prepare, embed_prepare_cb);
3019 ev_set_priority (&w->prepare, EV_MINPRI);
3020 ev_prepare_start (EV_A_ &w->prepare);
3021
3022 ev_fork_init (&w->fork, embed_fork_cb);
3023 ev_fork_start (EV_A_ &w->fork);
3024
3025 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3026
1146 ev_start ((W)w, 1); 3027 ev_start (EV_A_ (W)w, 1);
1147 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1148}
1149 3028
3029 EV_FREQUENT_CHECK;
3030}
3031
1150void 3032void
1151ev_child_stop (struct ev_child *w) 3033ev_embed_stop (EV_P_ ev_embed *w)
1152{ 3034{
1153 ev_clear_pending ((W)w); 3035 clear_pending (EV_A_ (W)w);
1154 if (ev_is_active (w)) 3036 if (expect_false (!ev_is_active (w)))
1155 return; 3037 return;
1156 3038
1157 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 3039 EV_FREQUENT_CHECK;
3040
3041 ev_io_stop (EV_A_ &w->io);
3042 ev_prepare_stop (EV_A_ &w->prepare);
3043 ev_fork_stop (EV_A_ &w->fork);
3044
3045 EV_FREQUENT_CHECK;
3046}
3047#endif
3048
3049#if EV_FORK_ENABLE
3050void
3051ev_fork_start (EV_P_ ev_fork *w)
3052{
3053 if (expect_false (ev_is_active (w)))
3054 return;
3055
3056 EV_FREQUENT_CHECK;
3057
3058 ev_start (EV_A_ (W)w, ++forkcnt);
3059 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3060 forks [forkcnt - 1] = w;
3061
3062 EV_FREQUENT_CHECK;
3063}
3064
3065void
3066ev_fork_stop (EV_P_ ev_fork *w)
3067{
3068 clear_pending (EV_A_ (W)w);
3069 if (expect_false (!ev_is_active (w)))
3070 return;
3071
3072 EV_FREQUENT_CHECK;
3073
3074 {
3075 int active = ev_active (w);
3076
3077 forks [active - 1] = forks [--forkcnt];
3078 ev_active (forks [active - 1]) = active;
3079 }
3080
1158 ev_stop ((W)w); 3081 ev_stop (EV_A_ (W)w);
3082
3083 EV_FREQUENT_CHECK;
1159} 3084}
3085#endif
3086
3087#if EV_ASYNC_ENABLE
3088void
3089ev_async_start (EV_P_ ev_async *w)
3090{
3091 if (expect_false (ev_is_active (w)))
3092 return;
3093
3094 evpipe_init (EV_A);
3095
3096 EV_FREQUENT_CHECK;
3097
3098 ev_start (EV_A_ (W)w, ++asynccnt);
3099 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3100 asyncs [asynccnt - 1] = w;
3101
3102 EV_FREQUENT_CHECK;
3103}
3104
3105void
3106ev_async_stop (EV_P_ ev_async *w)
3107{
3108 clear_pending (EV_A_ (W)w);
3109 if (expect_false (!ev_is_active (w)))
3110 return;
3111
3112 EV_FREQUENT_CHECK;
3113
3114 {
3115 int active = ev_active (w);
3116
3117 asyncs [active - 1] = asyncs [--asynccnt];
3118 ev_active (asyncs [active - 1]) = active;
3119 }
3120
3121 ev_stop (EV_A_ (W)w);
3122
3123 EV_FREQUENT_CHECK;
3124}
3125
3126void
3127ev_async_send (EV_P_ ev_async *w)
3128{
3129 w->sent = 1;
3130 evpipe_write (EV_A_ &gotasync);
3131}
3132#endif
1160 3133
1161/*****************************************************************************/ 3134/*****************************************************************************/
1162 3135
1163struct ev_once 3136struct ev_once
1164{ 3137{
1165 struct ev_io io; 3138 ev_io io;
1166 struct ev_timer to; 3139 ev_timer to;
1167 void (*cb)(int revents, void *arg); 3140 void (*cb)(int revents, void *arg);
1168 void *arg; 3141 void *arg;
1169}; 3142};
1170 3143
1171static void 3144static void
1172once_cb (struct ev_once *once, int revents) 3145once_cb (EV_P_ struct ev_once *once, int revents)
1173{ 3146{
1174 void (*cb)(int revents, void *arg) = once->cb; 3147 void (*cb)(int revents, void *arg) = once->cb;
1175 void *arg = once->arg; 3148 void *arg = once->arg;
1176 3149
1177 ev_io_stop (&once->io); 3150 ev_io_stop (EV_A_ &once->io);
1178 ev_timer_stop (&once->to); 3151 ev_timer_stop (EV_A_ &once->to);
1179 free (once); 3152 ev_free (once);
1180 3153
1181 cb (revents, arg); 3154 cb (revents, arg);
1182} 3155}
1183 3156
1184static void 3157static void
1185once_cb_io (struct ev_io *w, int revents) 3158once_cb_io (EV_P_ ev_io *w, int revents)
1186{ 3159{
1187 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3160 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3161
3162 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1188} 3163}
1189 3164
1190static void 3165static void
1191once_cb_to (struct ev_timer *w, int revents) 3166once_cb_to (EV_P_ ev_timer *w, int revents)
1192{ 3167{
1193 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3168 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
1194}
1195 3169
3170 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3171}
3172
1196void 3173void
1197ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3174ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1198{ 3175{
1199 struct ev_once *once = malloc (sizeof (struct ev_once)); 3176 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1200 3177
1201 if (!once) 3178 if (expect_false (!once))
3179 {
1202 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3180 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1203 else 3181 return;
1204 { 3182 }
3183
1205 once->cb = cb; 3184 once->cb = cb;
1206 once->arg = arg; 3185 once->arg = arg;
1207 3186
1208 ev_watcher_init (&once->io, once_cb_io); 3187 ev_init (&once->io, once_cb_io);
1209 if (fd >= 0) 3188 if (fd >= 0)
3189 {
3190 ev_io_set (&once->io, fd, events);
3191 ev_io_start (EV_A_ &once->io);
3192 }
3193
3194 ev_init (&once->to, once_cb_to);
3195 if (timeout >= 0.)
3196 {
3197 ev_timer_set (&once->to, timeout, 0.);
3198 ev_timer_start (EV_A_ &once->to);
3199 }
3200}
3201
3202/*****************************************************************************/
3203
3204#if 0
3205void
3206ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3207{
3208 int i, j;
3209 ev_watcher_list *wl, *wn;
3210
3211 if (types & (EV_IO | EV_EMBED))
3212 for (i = 0; i < anfdmax; ++i)
3213 for (wl = anfds [i].head; wl; )
1210 { 3214 {
1211 ev_io_set (&once->io, fd, events); 3215 wn = wl->next;
1212 ev_io_start (&once->io); 3216
3217#if EV_EMBED_ENABLE
3218 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3219 {
3220 if (types & EV_EMBED)
3221 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3222 }
3223 else
3224#endif
3225#if EV_USE_INOTIFY
3226 if (ev_cb ((ev_io *)wl) == infy_cb)
3227 ;
3228 else
3229#endif
3230 if ((ev_io *)wl != &pipeev)
3231 if (types & EV_IO)
3232 cb (EV_A_ EV_IO, wl);
3233
3234 wl = wn;
1213 } 3235 }
1214 3236
1215 ev_watcher_init (&once->to, once_cb_to); 3237 if (types & (EV_TIMER | EV_STAT))
1216 if (timeout >= 0.) 3238 for (i = timercnt + HEAP0; i-- > HEAP0; )
3239#if EV_STAT_ENABLE
3240 /*TODO: timer is not always active*/
3241 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1217 { 3242 {
1218 ev_timer_set (&once->to, timeout, 0.); 3243 if (types & EV_STAT)
1219 ev_timer_start (&once->to); 3244 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1220 } 3245 }
1221 } 3246 else
1222} 3247#endif
3248 if (types & EV_TIMER)
3249 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1223 3250
1224/*****************************************************************************/ 3251#if EV_PERIODIC_ENABLE
3252 if (types & EV_PERIODIC)
3253 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3254 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3255#endif
1225 3256
1226#if 0 3257#if EV_IDLE_ENABLE
3258 if (types & EV_IDLE)
3259 for (j = NUMPRI; i--; )
3260 for (i = idlecnt [j]; i--; )
3261 cb (EV_A_ EV_IDLE, idles [j][i]);
3262#endif
1227 3263
1228struct ev_io wio; 3264#if EV_FORK_ENABLE
3265 if (types & EV_FORK)
3266 for (i = forkcnt; i--; )
3267 if (ev_cb (forks [i]) != embed_fork_cb)
3268 cb (EV_A_ EV_FORK, forks [i]);
3269#endif
1229 3270
1230static void 3271#if EV_ASYNC_ENABLE
1231sin_cb (struct ev_io *w, int revents) 3272 if (types & EV_ASYNC)
1232{ 3273 for (i = asynccnt; i--; )
1233 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 3274 cb (EV_A_ EV_ASYNC, asyncs [i]);
1234} 3275#endif
1235 3276
1236static void 3277 if (types & EV_PREPARE)
1237ocb (struct ev_timer *w, int revents) 3278 for (i = preparecnt; i--; )
1238{ 3279#if EV_EMBED_ENABLE
1239 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 3280 if (ev_cb (prepares [i]) != embed_prepare_cb)
1240 ev_timer_stop (w); 3281#endif
1241 ev_timer_start (w); 3282 cb (EV_A_ EV_PREPARE, prepares [i]);
1242}
1243 3283
1244static void 3284 if (types & EV_CHECK)
1245scb (struct ev_signal *w, int revents) 3285 for (i = checkcnt; i--; )
1246{ 3286 cb (EV_A_ EV_CHECK, checks [i]);
1247 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1248 ev_io_stop (&wio);
1249 ev_io_start (&wio);
1250}
1251 3287
1252static void 3288 if (types & EV_SIGNAL)
1253gcb (struct ev_signal *w, int revents)
1254{
1255 fprintf (stderr, "generic %x\n", revents);
1256
1257}
1258
1259int main (void)
1260{
1261 ev_init (0);
1262
1263 ev_io_init (&wio, sin_cb, 0, EV_READ);
1264 ev_io_start (&wio);
1265
1266 struct ev_timer t[10000];
1267
1268#if 0
1269 int i;
1270 for (i = 0; i < 10000; ++i) 3289 for (i = 0; i < signalmax; ++i)
1271 { 3290 for (wl = signals [i].head; wl; )
1272 struct ev_timer *w = t + i; 3291 {
1273 ev_watcher_init (w, ocb, i); 3292 wn = wl->next;
1274 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533); 3293 cb (EV_A_ EV_SIGNAL, wl);
1275 ev_timer_start (w); 3294 wl = wn;
1276 if (drand48 () < 0.5) 3295 }
1277 ev_timer_stop (w);
1278 }
1279#endif
1280 3296
1281 struct ev_timer t1; 3297 if (types & EV_CHILD)
1282 ev_timer_init (&t1, ocb, 5, 10); 3298 for (i = EV_PID_HASHSIZE; i--; )
1283 ev_timer_start (&t1); 3299 for (wl = childs [i]; wl; )
1284 3300 {
1285 struct ev_signal sig; 3301 wn = wl->next;
1286 ev_signal_init (&sig, scb, SIGQUIT); 3302 cb (EV_A_ EV_CHILD, wl);
1287 ev_signal_start (&sig); 3303 wl = wn;
1288 3304 }
1289 struct ev_check cw; 3305/* EV_STAT 0x00001000 /* stat data changed */
1290 ev_check_init (&cw, gcb); 3306/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
1291 ev_check_start (&cw);
1292
1293 struct ev_idle iw;
1294 ev_idle_init (&iw, gcb);
1295 ev_idle_start (&iw);
1296
1297 ev_loop (0);
1298
1299 return 0;
1300} 3307}
1301
1302#endif 3308#endif
1303 3309
3310#if EV_MULTIPLICITY
3311 #include "ev_wrap.h"
3312#endif
1304 3313
3314#ifdef __cplusplus
3315}
3316#endif
1305 3317
1306

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