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Comparing libev/ev.c (file contents):
Revision 1.29 by root, Thu Nov 1 08:10:03 2007 UTC vs.
Revision 1.282 by root, Sat Mar 28 22:17:17 2009 UTC

1/* 1/*
2 * libev event processing core, watcher management
3 *
2 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de>
3 * All rights reserved. 5 * All rights reserved.
4 * 6 *
5 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
6 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
7 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
8 * 27 *
9 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
10 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
11 * 30 * in which case the provisions of the GPL are applicable instead of
12 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
13 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
14 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
15 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
16 * 35 * and other provisions required by the GPL. If you do not delete the
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */ 38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE
29#if EV_USE_CONFIG_H 46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
30# 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
31#endif 144#endif
32 145
33#include <math.h> 146#include <math.h>
34#include <stdlib.h> 147#include <stdlib.h>
35#include <unistd.h>
36#include <fcntl.h> 148#include <fcntl.h>
37#include <signal.h>
38#include <stddef.h> 149#include <stddef.h>
39 150
40#include <stdio.h> 151#include <stdio.h>
41 152
42#include <assert.h> 153#include <assert.h>
43#include <errno.h> 154#include <errno.h>
44#include <sys/types.h> 155#include <sys/types.h>
45#include <sys/wait.h>
46#include <sys/time.h>
47#include <time.h> 156#include <time.h>
48 157
158#include <signal.h>
159
160#ifdef EV_H
161# include EV_H
162#else
163# include "ev.h"
164#endif
165
166#ifndef _WIN32
167# include <sys/time.h>
168# include <sys/wait.h>
169# include <unistd.h>
170#else
171# include <io.h>
172# define WIN32_LEAN_AND_MEAN
173# include <windows.h>
174# ifndef EV_SELECT_IS_WINSOCKET
175# define EV_SELECT_IS_WINSOCKET 1
176# endif
177#endif
178
179/* this block tries to deduce configuration from header-defined symbols and defaults */
180
181#ifndef EV_USE_CLOCK_SYSCALL
182# if __linux && __GLIBC__ >= 2
183# define EV_USE_CLOCK_SYSCALL 1
184# else
185# define EV_USE_CLOCK_SYSCALL 0
186# endif
187#endif
188
49#ifndef EV_USE_MONOTONIC 189#ifndef EV_USE_MONOTONIC
50# ifdef CLOCK_MONOTONIC 190# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
51# 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
52# endif 206# endif
53#endif 207#endif
54 208
55#ifndef EV_USE_SELECT 209#ifndef EV_USE_SELECT
56# define EV_USE_SELECT 1 210# define EV_USE_SELECT 1
57#endif 211#endif
58 212
213#ifndef EV_USE_POLL
214# ifdef _WIN32
215# define EV_USE_POLL 0
216# else
217# define EV_USE_POLL 1
218# endif
219#endif
220
59#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
60# define EV_USE_EPOLL 0 225# define EV_USE_EPOLL 0
61#endif 226# endif
227#endif
62 228
229#ifndef EV_USE_KQUEUE
230# define EV_USE_KQUEUE 0
231#endif
232
63#ifndef EV_USE_REALTIME 233#ifndef EV_USE_PORT
64# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */ 234# define EV_USE_PORT 0
235#endif
236
237#ifndef EV_USE_INOTIFY
238# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
239# define EV_USE_INOTIFY 1
240# else
241# define EV_USE_INOTIFY 0
65#endif 242# endif
243#endif
244
245#ifndef EV_PID_HASHSIZE
246# if EV_MINIMAL
247# define EV_PID_HASHSIZE 1
248# else
249# define EV_PID_HASHSIZE 16
250# endif
251#endif
252
253#ifndef EV_INOTIFY_HASHSIZE
254# if EV_MINIMAL
255# define EV_INOTIFY_HASHSIZE 1
256# else
257# define EV_INOTIFY_HASHSIZE 16
258# endif
259#endif
260
261#ifndef EV_USE_EVENTFD
262# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
263# define EV_USE_EVENTFD 1
264# else
265# define EV_USE_EVENTFD 0
266# endif
267#endif
268
269#if 0 /* debugging */
270# define EV_VERIFY 3
271# define EV_USE_4HEAP 1
272# define EV_HEAP_CACHE_AT 1
273#endif
274
275#ifndef EV_VERIFY
276# define EV_VERIFY !EV_MINIMAL
277#endif
278
279#ifndef EV_USE_4HEAP
280# define EV_USE_4HEAP !EV_MINIMAL
281#endif
282
283#ifndef EV_HEAP_CACHE_AT
284# define EV_HEAP_CACHE_AT !EV_MINIMAL
285#endif
286
287/* this block fixes any misconfiguration where we know we run into trouble otherwise */
288
289#ifndef CLOCK_MONOTONIC
290# undef EV_USE_MONOTONIC
291# define EV_USE_MONOTONIC 0
292#endif
293
294#ifndef CLOCK_REALTIME
295# undef EV_USE_REALTIME
296# define EV_USE_REALTIME 0
297#endif
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
346/**/
347
348#if EV_VERIFY >= 3
349# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
350#else
351# define EV_FREQUENT_CHECK do { } while (0)
352#endif
353
354/*
355 * This is used to avoid floating point rounding problems.
356 * It is added to ev_rt_now when scheduling periodics
357 * to ensure progress, time-wise, even when rounding
358 * errors are against us.
359 * This value is good at least till the year 4000.
360 * Better solutions welcome.
361 */
362#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
66 363
67#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) */
68#define MAX_BLOCKTIME 59.731 365#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
69#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */ 366/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
70 367
71#include "ev.h" 368#if __GNUC__ >= 4
369# define expect(expr,value) __builtin_expect ((expr),(value))
370# define noinline __attribute__ ((noinline))
371#else
372# define expect(expr,value) (expr)
373# define noinline
374# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
375# define inline
376# endif
377#endif
72 378
379#define expect_false(expr) expect ((expr) != 0, 0)
380#define expect_true(expr) expect ((expr) != 0, 1)
381#define inline_size static inline
382
383#if EV_MINIMAL
384# define inline_speed static noinline
385#else
386# define inline_speed static inline
387#endif
388
389#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
390#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
391
392#define EMPTY /* required for microsofts broken pseudo-c compiler */
393#define EMPTY2(a,b) /* used to suppress some warnings */
394
73typedef struct ev_watcher *W; 395typedef ev_watcher *W;
74typedef struct ev_watcher_list *WL; 396typedef ev_watcher_list *WL;
75typedef struct ev_watcher_time *WT; 397typedef ev_watcher_time *WT;
76 398
77static ev_tstamp now, diff; /* monotonic clock */ 399#define ev_active(w) ((W)(w))->active
400#define ev_at(w) ((WT)(w))->at
401
402#if EV_USE_REALTIME
403/* sig_atomic_t is used to avoid per-thread variables or locking but still */
404/* giving it a reasonably high chance of working on typical architetcures */
405static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
406#endif
407
408#if EV_USE_MONOTONIC
409static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
410#endif
411
412#ifdef _WIN32
413# include "ev_win32.c"
414#endif
415
416/*****************************************************************************/
417
418static void (*syserr_cb)(const char *msg);
419
420void
421ev_set_syserr_cb (void (*cb)(const char *msg))
422{
423 syserr_cb = cb;
424}
425
426static void noinline
427ev_syserr (const char *msg)
428{
429 if (!msg)
430 msg = "(libev) system error";
431
432 if (syserr_cb)
433 syserr_cb (msg);
434 else
435 {
436 perror (msg);
437 abort ();
438 }
439}
440
441static void *
442ev_realloc_emul (void *ptr, long size)
443{
444 /* some systems, notably openbsd and darwin, fail to properly
445 * implement realloc (x, 0) (as required by both ansi c-98 and
446 * the single unix specification, so work around them here.
447 */
448
449 if (size)
450 return realloc (ptr, size);
451
452 free (ptr);
453 return 0;
454}
455
456static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
457
458void
459ev_set_allocator (void *(*cb)(void *ptr, long size))
460{
461 alloc = cb;
462}
463
464inline_speed void *
465ev_realloc (void *ptr, long size)
466{
467 ptr = alloc (ptr, size);
468
469 if (!ptr && size)
470 {
471 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
472 abort ();
473 }
474
475 return ptr;
476}
477
478#define ev_malloc(size) ev_realloc (0, (size))
479#define ev_free(ptr) ev_realloc ((ptr), 0)
480
481/*****************************************************************************/
482
483typedef struct
484{
485 WL head;
486 unsigned char events;
487 unsigned char reify;
488 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
489 unsigned char unused;
490#if EV_USE_EPOLL
491 unsigned int egen; /* generation counter to counter epoll bugs */
492#endif
493#if EV_SELECT_IS_WINSOCKET
494 SOCKET handle;
495#endif
496} ANFD;
497
498typedef struct
499{
500 W w;
501 int events;
502} ANPENDING;
503
504#if EV_USE_INOTIFY
505/* hash table entry per inotify-id */
506typedef struct
507{
508 WL head;
509} ANFS;
510#endif
511
512/* Heap Entry */
513#if EV_HEAP_CACHE_AT
514 typedef struct {
515 ev_tstamp at;
516 WT w;
517 } ANHE;
518
519 #define ANHE_w(he) (he).w /* access watcher, read-write */
520 #define ANHE_at(he) (he).at /* access cached at, read-only */
521 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
522#else
523 typedef WT ANHE;
524
525 #define ANHE_w(he) (he)
526 #define ANHE_at(he) (he)->at
527 #define ANHE_at_cache(he)
528#endif
529
530#if EV_MULTIPLICITY
531
532 struct ev_loop
533 {
534 ev_tstamp ev_rt_now;
535 #define ev_rt_now ((loop)->ev_rt_now)
536 #define VAR(name,decl) decl;
537 #include "ev_vars.h"
538 #undef VAR
539 };
540 #include "ev_wrap.h"
541
542 static struct ev_loop default_loop_struct;
543 struct ev_loop *ev_default_loop_ptr;
544
545#else
546
78ev_tstamp ev_now; 547 ev_tstamp ev_rt_now;
79int ev_method; 548 #define VAR(name,decl) static decl;
549 #include "ev_vars.h"
550 #undef VAR
80 551
81static int have_monotonic; /* runtime */ 552 static int ev_default_loop_ptr;
82 553
83static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 554#endif
84static void (*method_modify)(int fd, int oev, int nev);
85static void (*method_poll)(ev_tstamp timeout);
86 555
87/*****************************************************************************/ 556/*****************************************************************************/
88 557
89ev_tstamp 558ev_tstamp
90ev_time (void) 559ev_time (void)
91{ 560{
92#if EV_USE_REALTIME 561#if EV_USE_REALTIME
562 if (expect_true (have_realtime))
563 {
93 struct timespec ts; 564 struct timespec ts;
94 clock_gettime (CLOCK_REALTIME, &ts); 565 clock_gettime (CLOCK_REALTIME, &ts);
95 return ts.tv_sec + ts.tv_nsec * 1e-9; 566 return ts.tv_sec + ts.tv_nsec * 1e-9;
96#else 567 }
568#endif
569
97 struct timeval tv; 570 struct timeval tv;
98 gettimeofday (&tv, 0); 571 gettimeofday (&tv, 0);
99 return tv.tv_sec + tv.tv_usec * 1e-6; 572 return tv.tv_sec + tv.tv_usec * 1e-6;
100#endif
101} 573}
102 574
103static ev_tstamp 575ev_tstamp inline_size
104get_clock (void) 576get_clock (void)
105{ 577{
106#if EV_USE_MONOTONIC 578#if EV_USE_MONOTONIC
107 if (have_monotonic) 579 if (expect_true (have_monotonic))
108 { 580 {
109 struct timespec ts; 581 struct timespec ts;
110 clock_gettime (CLOCK_MONOTONIC, &ts); 582 clock_gettime (CLOCK_MONOTONIC, &ts);
111 return ts.tv_sec + ts.tv_nsec * 1e-9; 583 return ts.tv_sec + ts.tv_nsec * 1e-9;
112 } 584 }
113#endif 585#endif
114 586
115 return ev_time (); 587 return ev_time ();
116} 588}
117 589
118#define array_nextsize(n) (((n) << 1) | 4 & ~3) 590#if EV_MULTIPLICITY
119#define array_prevsize(n) (((n) >> 1) | 4 & ~3) 591ev_tstamp
592ev_now (EV_P)
593{
594 return ev_rt_now;
595}
596#endif
120 597
121#define array_needsize(base,cur,cnt,init) \ 598void
122 if ((cnt) > cur) \ 599ev_sleep (ev_tstamp delay)
123 { \ 600{
124 int newcnt = cur; \ 601 if (delay > 0.)
125 do \
126 { \
127 newcnt = array_nextsize (newcnt); \
128 } \
129 while ((cnt) > newcnt); \
130 \
131 base = realloc (base, sizeof (*base) * (newcnt)); \
132 init (base + cur, newcnt - cur); \
133 cur = newcnt; \
134 } 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}
135 625
136/*****************************************************************************/ 626/*****************************************************************************/
137 627
138typedef struct 628#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
139{
140 struct ev_io *head;
141 int events;
142} ANFD;
143 629
144static ANFD *anfds; 630int inline_size
145static int anfdmax; 631array_nextsize (int elem, int cur, int cnt)
146
147static void
148anfds_init (ANFD *base, int count)
149{ 632{
150 while (count--) 633 int ncur = cur + 1;
151 { 634
152 base->head = 0; 635 do
153 base->events = EV_NONE; 636 ncur <<= 1;
154 ++base; 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)
155 } 641 {
156} 642 ncur *= elem;
157 643 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
158typedef struct 644 ncur = ncur - sizeof (void *) * 4;
159{ 645 ncur /= elem;
160 W w;
161 int events;
162} ANPENDING;
163
164static ANPENDING *pendings;
165static int pendingmax, pendingcnt;
166
167static void
168event (W w, int events)
169{
170 if (w->active)
171 { 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 {
172 w->pending = ++pendingcnt; 695 w_->pending = ++pendingcnt [pri];
173 array_needsize (pendings, pendingmax, pendingcnt, ); 696 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
174 pendings [pendingcnt - 1].w = w; 697 pendings [pri][w_->pending - 1].w = w_;
175 pendings [pendingcnt - 1].events = events; 698 pendings [pri][w_->pending - 1].events = revents;
176 } 699 }
177} 700}
178 701
179static void 702void inline_speed
180queue_events (W *events, int eventcnt, int type) 703queue_events (EV_P_ W *events, int eventcnt, int type)
181{ 704{
182 int i; 705 int i;
183 706
184 for (i = 0; i < eventcnt; ++i) 707 for (i = 0; i < eventcnt; ++i)
185 event (events [i], type); 708 ev_feed_event (EV_A_ events [i], type);
186} 709}
187 710
188static void 711/*****************************************************************************/
712
713void inline_speed
189fd_event (int fd, int events) 714fd_event (EV_P_ int fd, int revents)
190{ 715{
191 ANFD *anfd = anfds + fd; 716 ANFD *anfd = anfds + fd;
192 struct ev_io *w; 717 ev_io *w;
193 718
194 for (w = anfd->head; w; w = w->next) 719 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
195 { 720 {
196 int ev = w->events & events; 721 int ev = w->events & revents;
197 722
198 if (ev) 723 if (ev)
199 event ((W)w, ev); 724 ev_feed_event (EV_A_ (W)w, ev);
200 } 725 }
201} 726}
202 727
203/*****************************************************************************/ 728void
729ev_feed_fd_event (EV_P_ int fd, int revents)
730{
731 if (fd >= 0 && fd < anfdmax)
732 fd_event (EV_A_ fd, revents);
733}
204 734
205static int *fdchanges; 735void inline_size
206static int fdchangemax, fdchangecnt; 736fd_reify (EV_P)
207
208static void
209fd_reify (void)
210{ 737{
211 int i; 738 int i;
212 739
213 for (i = 0; i < fdchangecnt; ++i) 740 for (i = 0; i < fdchangecnt; ++i)
214 { 741 {
215 int fd = fdchanges [i]; 742 int fd = fdchanges [i];
216 ANFD *anfd = anfds + fd; 743 ANFD *anfd = anfds + fd;
217 struct ev_io *w; 744 ev_io *w;
218 745
219 int events = 0; 746 unsigned char events = 0;
220 747
221 for (w = anfd->head; w; w = w->next) 748 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
222 events |= w->events; 749 events |= (unsigned char)w->events;
223 750
224 anfd->events &= ~EV_REIFY; 751#if EV_SELECT_IS_WINSOCKET
225 752 if (events)
226 if (anfd->events != events)
227 { 753 {
228 method_modify (fd, anfd->events, events); 754 unsigned long arg;
229 anfd->events = events; 755 #ifdef EV_FD_TO_WIN32_HANDLE
756 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
757 #else
758 anfd->handle = _get_osfhandle (fd);
759 #endif
760 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
230 } 761 }
762#endif
763
764 {
765 unsigned char o_events = anfd->events;
766 unsigned char o_reify = anfd->reify;
767
768 anfd->reify = 0;
769 anfd->events = events;
770
771 if (o_events != events || o_reify & EV__IOFDSET)
772 backend_modify (EV_A_ fd, o_events, events);
773 }
231 } 774 }
232 775
233 fdchangecnt = 0; 776 fdchangecnt = 0;
234} 777}
235 778
236static void 779void inline_size
237fd_change (int fd) 780fd_change (EV_P_ int fd, int flags)
238{ 781{
239 if (anfds [fd].events & EV_REIFY || fdchangecnt < 0) 782 unsigned char reify = anfds [fd].reify;
240 return; 783 anfds [fd].reify |= flags;
241 784
242 anfds [fd].events |= EV_REIFY; 785 if (expect_true (!reify))
243 786 {
244 ++fdchangecnt; 787 ++fdchangecnt;
245 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 788 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
246 fdchanges [fdchangecnt - 1] = fd; 789 fdchanges [fdchangecnt - 1] = fd;
790 }
791}
792
793void inline_speed
794fd_kill (EV_P_ int fd)
795{
796 ev_io *w;
797
798 while ((w = (ev_io *)anfds [fd].head))
799 {
800 ev_io_stop (EV_A_ w);
801 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
802 }
803}
804
805int inline_size
806fd_valid (int fd)
807{
808#ifdef _WIN32
809 return _get_osfhandle (fd) != -1;
810#else
811 return fcntl (fd, F_GETFD) != -1;
812#endif
247} 813}
248 814
249/* called on EBADF to verify fds */ 815/* called on EBADF to verify fds */
250static void 816static void noinline
251fd_recheck (void) 817fd_ebadf (EV_P)
252{ 818{
253 int fd; 819 int fd;
254 820
255 for (fd = 0; fd < anfdmax; ++fd) 821 for (fd = 0; fd < anfdmax; ++fd)
256 if (anfds [fd].events) 822 if (anfds [fd].events)
257 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 823 if (!fd_valid (fd) && errno == EBADF)
258 while (anfds [fd].head) 824 fd_kill (EV_A_ fd);
825}
826
827/* called on ENOMEM in select/poll to kill some fds and retry */
828static void noinline
829fd_enomem (EV_P)
830{
831 int fd;
832
833 for (fd = anfdmax; fd--; )
834 if (anfds [fd].events)
259 { 835 {
260 event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT); 836 fd_kill (EV_A_ fd);
261 ev_io_stop (anfds [fd].head); 837 return;
262 } 838 }
839}
840
841/* usually called after fork if backend needs to re-arm all fds from scratch */
842static void noinline
843fd_rearm_all (EV_P)
844{
845 int fd;
846
847 for (fd = 0; fd < anfdmax; ++fd)
848 if (anfds [fd].events)
849 {
850 anfds [fd].events = 0;
851 anfds [fd].emask = 0;
852 fd_change (EV_A_ fd, EV__IOFDSET | 1);
853 }
263} 854}
264 855
265/*****************************************************************************/ 856/*****************************************************************************/
266 857
267static struct ev_timer **timers; 858/*
268static int timermax, timercnt; 859 * the heap functions want a real array index. array index 0 uis guaranteed to not
860 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
861 * the branching factor of the d-tree.
862 */
269 863
270static struct ev_periodic **periodics; 864/*
271static int periodicmax, periodiccnt; 865 * at the moment we allow libev the luxury of two heaps,
866 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
867 * which is more cache-efficient.
868 * the difference is about 5% with 50000+ watchers.
869 */
870#if EV_USE_4HEAP
272 871
273static void 872#define DHEAP 4
274upheap (WT *timers, int k) 873#define HEAP0 (DHEAP - 1) /* index of first element in heap */
275{ 874#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
276 WT w = timers [k]; 875#define UPHEAP_DONE(p,k) ((p) == (k))
277 876
278 while (k && timers [k >> 1]->at > w->at) 877/* away from the root */
279 { 878void inline_speed
280 timers [k] = timers [k >> 1];
281 timers [k]->active = k + 1;
282 k >>= 1;
283 }
284
285 timers [k] = w;
286 timers [k]->active = k + 1;
287
288}
289
290static void
291downheap (WT *timers, int N, int k) 879downheap (ANHE *heap, int N, int k)
292{ 880{
293 WT w = timers [k]; 881 ANHE he = heap [k];
882 ANHE *E = heap + N + HEAP0;
294 883
295 while (k < (N >> 1)) 884 for (;;)
296 { 885 {
297 int j = k << 1; 886 ev_tstamp minat;
887 ANHE *minpos;
888 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
298 889
299 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 890 /* find minimum child */
891 if (expect_true (pos + DHEAP - 1 < E))
300 ++j; 892 {
301 893 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
302 if (w->at <= timers [j]->at) 894 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
895 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
896 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
897 }
898 else if (pos < E)
899 {
900 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
901 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
902 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
903 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
904 }
905 else
303 break; 906 break;
304 907
305 timers [k] = timers [j]; 908 if (ANHE_at (he) <= minat)
306 timers [k]->active = k + 1; 909 break;
910
911 heap [k] = *minpos;
912 ev_active (ANHE_w (*minpos)) = k;
913
914 k = minpos - heap;
915 }
916
917 heap [k] = he;
918 ev_active (ANHE_w (he)) = k;
919}
920
921#else /* 4HEAP */
922
923#define HEAP0 1
924#define HPARENT(k) ((k) >> 1)
925#define UPHEAP_DONE(p,k) (!(p))
926
927/* away from the root */
928void inline_speed
929downheap (ANHE *heap, int N, int k)
930{
931 ANHE he = heap [k];
932
933 for (;;)
934 {
935 int c = k << 1;
936
937 if (c > N + HEAP0 - 1)
938 break;
939
940 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
941 ? 1 : 0;
942
943 if (ANHE_at (he) <= ANHE_at (heap [c]))
944 break;
945
946 heap [k] = heap [c];
947 ev_active (ANHE_w (heap [k])) = k;
948
307 k = j; 949 k = c;
950 }
951
952 heap [k] = he;
953 ev_active (ANHE_w (he)) = k;
954}
955#endif
956
957/* towards the root */
958void inline_speed
959upheap (ANHE *heap, int k)
960{
961 ANHE he = heap [k];
962
963 for (;;)
308 } 964 {
965 int p = HPARENT (k);
309 966
310 timers [k] = w; 967 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
311 timers [k]->active = k + 1; 968 break;
969
970 heap [k] = heap [p];
971 ev_active (ANHE_w (heap [k])) = k;
972 k = p;
973 }
974
975 heap [k] = he;
976 ev_active (ANHE_w (he)) = k;
977}
978
979void inline_size
980adjustheap (ANHE *heap, int N, int k)
981{
982 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
983 upheap (heap, k);
984 else
985 downheap (heap, N, k);
986}
987
988/* rebuild the heap: this function is used only once and executed rarely */
989void inline_size
990reheap (ANHE *heap, int N)
991{
992 int i;
993
994 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
995 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
996 for (i = 0; i < N; ++i)
997 upheap (heap, i + HEAP0);
312} 998}
313 999
314/*****************************************************************************/ 1000/*****************************************************************************/
315 1001
316typedef struct 1002typedef struct
317{ 1003{
318 struct ev_signal *head; 1004 WL head;
319 sig_atomic_t gotsig; 1005 EV_ATOMIC_T gotsig;
320} ANSIG; 1006} ANSIG;
321 1007
322static ANSIG *signals; 1008static ANSIG *signals;
323static int signalmax; 1009static int signalmax;
324 1010
325static int sigpipe [2]; 1011static EV_ATOMIC_T gotsig;
326static sig_atomic_t gotsig; 1012
327static struct ev_io sigev; 1013/*****************************************************************************/
1014
1015void inline_speed
1016fd_intern (int fd)
1017{
1018#ifdef _WIN32
1019 unsigned long arg = 1;
1020 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1021#else
1022 fcntl (fd, F_SETFD, FD_CLOEXEC);
1023 fcntl (fd, F_SETFL, O_NONBLOCK);
1024#endif
1025}
1026
1027static void noinline
1028evpipe_init (EV_P)
1029{
1030 if (!ev_is_active (&pipeev))
1031 {
1032#if EV_USE_EVENTFD
1033 if ((evfd = eventfd (0, 0)) >= 0)
1034 {
1035 evpipe [0] = -1;
1036 fd_intern (evfd);
1037 ev_io_set (&pipeev, evfd, EV_READ);
1038 }
1039 else
1040#endif
1041 {
1042 while (pipe (evpipe))
1043 ev_syserr ("(libev) error creating signal/async pipe");
1044
1045 fd_intern (evpipe [0]);
1046 fd_intern (evpipe [1]);
1047 ev_io_set (&pipeev, evpipe [0], EV_READ);
1048 }
1049
1050 ev_io_start (EV_A_ &pipeev);
1051 ev_unref (EV_A); /* watcher should not keep loop alive */
1052 }
1053}
1054
1055void inline_size
1056evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1057{
1058 if (!*flag)
1059 {
1060 int old_errno = errno; /* save errno because write might clobber it */
1061
1062 *flag = 1;
1063
1064#if EV_USE_EVENTFD
1065 if (evfd >= 0)
1066 {
1067 uint64_t counter = 1;
1068 write (evfd, &counter, sizeof (uint64_t));
1069 }
1070 else
1071#endif
1072 write (evpipe [1], &old_errno, 1);
1073
1074 errno = old_errno;
1075 }
1076}
328 1077
329static void 1078static void
330signals_init (ANSIG *base, int count) 1079pipecb (EV_P_ ev_io *iow, int revents)
331{ 1080{
332 while (count--) 1081#if EV_USE_EVENTFD
1082 if (evfd >= 0)
1083 {
1084 uint64_t counter;
1085 read (evfd, &counter, sizeof (uint64_t));
333 { 1086 }
334 base->head = 0; 1087 else
1088#endif
1089 {
1090 char dummy;
1091 read (evpipe [0], &dummy, 1);
1092 }
1093
1094 if (gotsig && ev_is_default_loop (EV_A))
1095 {
1096 int signum;
335 base->gotsig = 0; 1097 gotsig = 0;
336 ++base; 1098
1099 for (signum = signalmax; signum--; )
1100 if (signals [signum].gotsig)
1101 ev_feed_signal_event (EV_A_ signum + 1);
1102 }
1103
1104#if EV_ASYNC_ENABLE
1105 if (gotasync)
337 } 1106 {
1107 int i;
1108 gotasync = 0;
1109
1110 for (i = asynccnt; i--; )
1111 if (asyncs [i]->sent)
1112 {
1113 asyncs [i]->sent = 0;
1114 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1115 }
1116 }
1117#endif
338} 1118}
1119
1120/*****************************************************************************/
339 1121
340static void 1122static void
341sighandler (int signum) 1123ev_sighandler (int signum)
342{ 1124{
1125#if EV_MULTIPLICITY
1126 struct ev_loop *loop = &default_loop_struct;
1127#endif
1128
1129#if _WIN32
1130 signal (signum, ev_sighandler);
1131#endif
1132
343 signals [signum - 1].gotsig = 1; 1133 signals [signum - 1].gotsig = 1;
344 1134 evpipe_write (EV_A_ &gotsig);
345 if (!gotsig)
346 {
347 gotsig = 1;
348 write (sigpipe [1], &gotsig, 1);
349 }
350} 1135}
351 1136
352static void 1137void noinline
353sigcb (struct ev_io *iow, int revents) 1138ev_feed_signal_event (EV_P_ int signum)
354{ 1139{
355 struct ev_signal *w; 1140 WL w;
356 int sig;
357 1141
358 gotsig = 0; 1142#if EV_MULTIPLICITY
359 read (sigpipe [0], &revents, 1); 1143 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1144#endif
360 1145
361 for (sig = signalmax; sig--; ) 1146 --signum;
362 if (signals [sig].gotsig) 1147
363 { 1148 if (signum < 0 || signum >= signalmax)
1149 return;
1150
364 signals [sig].gotsig = 0; 1151 signals [signum].gotsig = 0;
365 1152
366 for (w = signals [sig].head; w; w = w->next) 1153 for (w = signals [signum].head; w; w = w->next)
367 event ((W)w, EV_SIGNAL); 1154 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
368 }
369}
370
371static void
372siginit (void)
373{
374 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
375 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
376
377 /* rather than sort out wether we really need nb, set it */
378 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
379 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
380
381 ev_io_set (&sigev, sigpipe [0], EV_READ);
382 ev_io_start (&sigev);
383} 1155}
384 1156
385/*****************************************************************************/ 1157/*****************************************************************************/
386 1158
387static struct ev_idle **idles; 1159static WL childs [EV_PID_HASHSIZE];
388static int idlemax, idlecnt;
389 1160
390static struct ev_prepare **prepares; 1161#ifndef _WIN32
391static int preparemax, preparecnt;
392 1162
393static struct ev_check **checks;
394static int checkmax, checkcnt;
395
396/*****************************************************************************/
397
398static struct ev_child *childs [PID_HASHSIZE];
399static struct ev_signal childev; 1163static ev_signal childev;
1164
1165#ifndef WIFCONTINUED
1166# define WIFCONTINUED(status) 0
1167#endif
1168
1169void inline_speed
1170child_reap (EV_P_ int chain, int pid, int status)
1171{
1172 ev_child *w;
1173 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1174
1175 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1176 {
1177 if ((w->pid == pid || !w->pid)
1178 && (!traced || (w->flags & 1)))
1179 {
1180 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1181 w->rpid = pid;
1182 w->rstatus = status;
1183 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1184 }
1185 }
1186}
400 1187
401#ifndef WCONTINUED 1188#ifndef WCONTINUED
402# define WCONTINUED 0 1189# define WCONTINUED 0
403#endif 1190#endif
404 1191
405static void 1192static void
406childcb (struct ev_signal *sw, int revents) 1193childcb (EV_P_ ev_signal *sw, int revents)
407{ 1194{
408 struct ev_child *w;
409 int pid, status; 1195 int pid, status;
410 1196
1197 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
411 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1198 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
412 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1199 if (!WCONTINUED
413 if (w->pid == pid || w->pid == -1) 1200 || errno != EINVAL
414 { 1201 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
415 w->status = status; 1202 return;
416 event ((W)w, EV_CHILD); 1203
417 } 1204 /* make sure we are called again until all children have been reaped */
1205 /* we need to do it this way so that the callback gets called before we continue */
1206 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1207
1208 child_reap (EV_A_ pid, pid, status);
1209 if (EV_PID_HASHSIZE > 1)
1210 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
418} 1211}
1212
1213#endif
419 1214
420/*****************************************************************************/ 1215/*****************************************************************************/
421 1216
1217#if EV_USE_PORT
1218# include "ev_port.c"
1219#endif
1220#if EV_USE_KQUEUE
1221# include "ev_kqueue.c"
1222#endif
422#if EV_USE_EPOLL 1223#if EV_USE_EPOLL
423# include "ev_epoll.c" 1224# include "ev_epoll.c"
424#endif 1225#endif
1226#if EV_USE_POLL
1227# include "ev_poll.c"
1228#endif
425#if EV_USE_SELECT 1229#if EV_USE_SELECT
426# include "ev_select.c" 1230# include "ev_select.c"
427#endif 1231#endif
428 1232
429int 1233int
… …
436ev_version_minor (void) 1240ev_version_minor (void)
437{ 1241{
438 return EV_VERSION_MINOR; 1242 return EV_VERSION_MINOR;
439} 1243}
440 1244
441int ev_init (int flags) 1245/* return true if we are running with elevated privileges and should ignore env variables */
1246int inline_size
1247enable_secure (void)
442{ 1248{
443 if (!ev_method) 1249#ifdef _WIN32
1250 return 0;
1251#else
1252 return getuid () != geteuid ()
1253 || getgid () != getegid ();
1254#endif
1255}
1256
1257unsigned int
1258ev_supported_backends (void)
1259{
1260 unsigned int flags = 0;
1261
1262 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1263 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1264 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1265 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1266 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1267
1268 return flags;
1269}
1270
1271unsigned int
1272ev_recommended_backends (void)
1273{
1274 unsigned int flags = ev_supported_backends ();
1275
1276#ifndef __NetBSD__
1277 /* kqueue is borked on everything but netbsd apparently */
1278 /* it usually doesn't work correctly on anything but sockets and pipes */
1279 flags &= ~EVBACKEND_KQUEUE;
1280#endif
1281#ifdef __APPLE__
1282 /* only select works correctly on that "unix-certified" platform */
1283 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1284 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1285#endif
1286
1287 return flags;
1288}
1289
1290unsigned int
1291ev_embeddable_backends (void)
1292{
1293 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1294
1295 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1296 /* please fix it and tell me how to detect the fix */
1297 flags &= ~EVBACKEND_EPOLL;
1298
1299 return flags;
1300}
1301
1302unsigned int
1303ev_backend (EV_P)
1304{
1305 return backend;
1306}
1307
1308unsigned int
1309ev_loop_count (EV_P)
1310{
1311 return loop_count;
1312}
1313
1314void
1315ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1316{
1317 io_blocktime = interval;
1318}
1319
1320void
1321ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1322{
1323 timeout_blocktime = interval;
1324}
1325
1326static void noinline
1327loop_init (EV_P_ unsigned int flags)
1328{
1329 if (!backend)
444 { 1330 {
1331#if EV_USE_REALTIME
1332 if (!have_realtime)
1333 {
1334 struct timespec ts;
1335
1336 if (!clock_gettime (CLOCK_REALTIME, &ts))
1337 have_realtime = 1;
1338 }
1339#endif
1340
445#if EV_USE_MONOTONIC 1341#if EV_USE_MONOTONIC
1342 if (!have_monotonic)
1343 {
1344 struct timespec ts;
1345
1346 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1347 have_monotonic = 1;
1348 }
1349#endif
1350
1351 ev_rt_now = ev_time ();
1352 mn_now = get_clock ();
1353 now_floor = mn_now;
1354 rtmn_diff = ev_rt_now - mn_now;
1355
1356 io_blocktime = 0.;
1357 timeout_blocktime = 0.;
1358 backend = 0;
1359 backend_fd = -1;
1360 gotasync = 0;
1361#if EV_USE_INOTIFY
1362 fs_fd = -2;
1363#endif
1364
1365 /* pid check not overridable via env */
1366#ifndef _WIN32
1367 if (flags & EVFLAG_FORKCHECK)
1368 curpid = getpid ();
1369#endif
1370
1371 if (!(flags & EVFLAG_NOENV)
1372 && !enable_secure ()
1373 && getenv ("LIBEV_FLAGS"))
1374 flags = atoi (getenv ("LIBEV_FLAGS"));
1375
1376 if (!(flags & 0x0000ffffU))
1377 flags |= ev_recommended_backends ();
1378
1379#if EV_USE_PORT
1380 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1381#endif
1382#if EV_USE_KQUEUE
1383 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1384#endif
1385#if EV_USE_EPOLL
1386 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1387#endif
1388#if EV_USE_POLL
1389 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1390#endif
1391#if EV_USE_SELECT
1392 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1393#endif
1394
1395 ev_init (&pipeev, pipecb);
1396 ev_set_priority (&pipeev, EV_MAXPRI);
1397 }
1398}
1399
1400static void noinline
1401loop_destroy (EV_P)
1402{
1403 int i;
1404
1405 if (ev_is_active (&pipeev))
1406 {
1407 ev_ref (EV_A); /* signal watcher */
1408 ev_io_stop (EV_A_ &pipeev);
1409
1410#if EV_USE_EVENTFD
1411 if (evfd >= 0)
1412 close (evfd);
1413#endif
1414
1415 if (evpipe [0] >= 0)
1416 {
1417 close (evpipe [0]);
1418 close (evpipe [1]);
1419 }
1420 }
1421
1422#if EV_USE_INOTIFY
1423 if (fs_fd >= 0)
1424 close (fs_fd);
1425#endif
1426
1427 if (backend_fd >= 0)
1428 close (backend_fd);
1429
1430#if EV_USE_PORT
1431 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1432#endif
1433#if EV_USE_KQUEUE
1434 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1435#endif
1436#if EV_USE_EPOLL
1437 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1438#endif
1439#if EV_USE_POLL
1440 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1441#endif
1442#if EV_USE_SELECT
1443 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1444#endif
1445
1446 for (i = NUMPRI; i--; )
1447 {
1448 array_free (pending, [i]);
1449#if EV_IDLE_ENABLE
1450 array_free (idle, [i]);
1451#endif
1452 }
1453
1454 ev_free (anfds); anfdmax = 0;
1455
1456 /* have to use the microsoft-never-gets-it-right macro */
1457 array_free (fdchange, EMPTY);
1458 array_free (timer, EMPTY);
1459#if EV_PERIODIC_ENABLE
1460 array_free (periodic, EMPTY);
1461#endif
1462#if EV_FORK_ENABLE
1463 array_free (fork, EMPTY);
1464#endif
1465 array_free (prepare, EMPTY);
1466 array_free (check, EMPTY);
1467#if EV_ASYNC_ENABLE
1468 array_free (async, EMPTY);
1469#endif
1470
1471 backend = 0;
1472}
1473
1474#if EV_USE_INOTIFY
1475void inline_size infy_fork (EV_P);
1476#endif
1477
1478void inline_size
1479loop_fork (EV_P)
1480{
1481#if EV_USE_PORT
1482 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1483#endif
1484#if EV_USE_KQUEUE
1485 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1486#endif
1487#if EV_USE_EPOLL
1488 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1489#endif
1490#if EV_USE_INOTIFY
1491 infy_fork (EV_A);
1492#endif
1493
1494 if (ev_is_active (&pipeev))
1495 {
1496 /* this "locks" the handlers against writing to the pipe */
1497 /* while we modify the fd vars */
1498 gotsig = 1;
1499#if EV_ASYNC_ENABLE
1500 gotasync = 1;
1501#endif
1502
1503 ev_ref (EV_A);
1504 ev_io_stop (EV_A_ &pipeev);
1505
1506#if EV_USE_EVENTFD
1507 if (evfd >= 0)
1508 close (evfd);
1509#endif
1510
1511 if (evpipe [0] >= 0)
1512 {
1513 close (evpipe [0]);
1514 close (evpipe [1]);
1515 }
1516
1517 evpipe_init (EV_A);
1518 /* now iterate over everything, in case we missed something */
1519 pipecb (EV_A_ &pipeev, EV_READ);
1520 }
1521
1522 postfork = 0;
1523}
1524
1525#if EV_MULTIPLICITY
1526
1527struct ev_loop *
1528ev_loop_new (unsigned int flags)
1529{
1530 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1531
1532 memset (loop, 0, sizeof (struct ev_loop));
1533
1534 loop_init (EV_A_ flags);
1535
1536 if (ev_backend (EV_A))
1537 return loop;
1538
1539 return 0;
1540}
1541
1542void
1543ev_loop_destroy (EV_P)
1544{
1545 loop_destroy (EV_A);
1546 ev_free (loop);
1547}
1548
1549void
1550ev_loop_fork (EV_P)
1551{
1552 postfork = 1; /* must be in line with ev_default_fork */
1553}
1554
1555#if EV_VERIFY
1556static void noinline
1557verify_watcher (EV_P_ W w)
1558{
1559 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1560
1561 if (w->pending)
1562 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1563}
1564
1565static void noinline
1566verify_heap (EV_P_ ANHE *heap, int N)
1567{
1568 int i;
1569
1570 for (i = HEAP0; i < N + HEAP0; ++i)
1571 {
1572 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1573 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1574 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1575
1576 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1577 }
1578}
1579
1580static void noinline
1581array_verify (EV_P_ W *ws, int cnt)
1582{
1583 while (cnt--)
1584 {
1585 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1586 verify_watcher (EV_A_ ws [cnt]);
1587 }
1588}
1589#endif
1590
1591void
1592ev_loop_verify (EV_P)
1593{
1594#if EV_VERIFY
1595 int i;
1596 WL w;
1597
1598 assert (activecnt >= -1);
1599
1600 assert (fdchangemax >= fdchangecnt);
1601 for (i = 0; i < fdchangecnt; ++i)
1602 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1603
1604 assert (anfdmax >= 0);
1605 for (i = 0; i < anfdmax; ++i)
1606 for (w = anfds [i].head; w; w = w->next)
446 { 1607 {
447 struct timespec ts; 1608 verify_watcher (EV_A_ (W)w);
448 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1609 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
449 have_monotonic = 1; 1610 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
450 } 1611 }
1612
1613 assert (timermax >= timercnt);
1614 verify_heap (EV_A_ timers, timercnt);
1615
1616#if EV_PERIODIC_ENABLE
1617 assert (periodicmax >= periodiccnt);
1618 verify_heap (EV_A_ periodics, periodiccnt);
1619#endif
1620
1621 for (i = NUMPRI; i--; )
1622 {
1623 assert (pendingmax [i] >= pendingcnt [i]);
1624#if EV_IDLE_ENABLE
1625 assert (idleall >= 0);
1626 assert (idlemax [i] >= idlecnt [i]);
1627 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1628#endif
1629 }
1630
1631#if EV_FORK_ENABLE
1632 assert (forkmax >= forkcnt);
1633 array_verify (EV_A_ (W *)forks, forkcnt);
1634#endif
1635
1636#if EV_ASYNC_ENABLE
1637 assert (asyncmax >= asynccnt);
1638 array_verify (EV_A_ (W *)asyncs, asynccnt);
1639#endif
1640
1641 assert (preparemax >= preparecnt);
1642 array_verify (EV_A_ (W *)prepares, preparecnt);
1643
1644 assert (checkmax >= checkcnt);
1645 array_verify (EV_A_ (W *)checks, checkcnt);
1646
1647# if 0
1648 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1649 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
451#endif 1650# endif
452
453 ev_now = ev_time ();
454 now = get_clock ();
455 diff = ev_now - now;
456
457 if (pipe (sigpipe))
458 return 0;
459
460 ev_method = EVMETHOD_NONE;
461#if EV_USE_EPOLL
462 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
463#endif 1651#endif
464#if EV_USE_SELECT 1652}
465 if (ev_method == EVMETHOD_NONE) select_init (flags);
466#endif
467 1653
468 if (ev_method) 1654#endif /* multiplicity */
1655
1656#if EV_MULTIPLICITY
1657struct ev_loop *
1658ev_default_loop_init (unsigned int flags)
1659#else
1660int
1661ev_default_loop (unsigned int flags)
1662#endif
1663{
1664 if (!ev_default_loop_ptr)
1665 {
1666#if EV_MULTIPLICITY
1667 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1668#else
1669 ev_default_loop_ptr = 1;
1670#endif
1671
1672 loop_init (EV_A_ flags);
1673
1674 if (ev_backend (EV_A))
469 { 1675 {
470 ev_watcher_init (&sigev, sigcb); 1676#ifndef _WIN32
471 siginit ();
472
473 ev_signal_init (&childev, childcb, SIGCHLD); 1677 ev_signal_init (&childev, childcb, SIGCHLD);
1678 ev_set_priority (&childev, EV_MAXPRI);
474 ev_signal_start (&childev); 1679 ev_signal_start (EV_A_ &childev);
1680 ev_unref (EV_A); /* child watcher should not keep loop alive */
1681#endif
475 } 1682 }
1683 else
1684 ev_default_loop_ptr = 0;
476 } 1685 }
477 1686
478 return ev_method; 1687 return ev_default_loop_ptr;
1688}
1689
1690void
1691ev_default_destroy (void)
1692{
1693#if EV_MULTIPLICITY
1694 struct ev_loop *loop = ev_default_loop_ptr;
1695#endif
1696
1697 ev_default_loop_ptr = 0;
1698
1699#ifndef _WIN32
1700 ev_ref (EV_A); /* child watcher */
1701 ev_signal_stop (EV_A_ &childev);
1702#endif
1703
1704 loop_destroy (EV_A);
1705}
1706
1707void
1708ev_default_fork (void)
1709{
1710#if EV_MULTIPLICITY
1711 struct ev_loop *loop = ev_default_loop_ptr;
1712#endif
1713
1714 postfork = 1; /* must be in line with ev_loop_fork */
479} 1715}
480 1716
481/*****************************************************************************/ 1717/*****************************************************************************/
482 1718
483void 1719void
484ev_prefork (void) 1720ev_invoke (EV_P_ void *w, int revents)
485{ 1721{
486 /* nop */ 1722 EV_CB_INVOKE ((W)w, revents);
487} 1723}
488 1724
489void 1725void inline_speed
490ev_postfork_parent (void)
491{
492 /* nop */
493}
494
495void
496ev_postfork_child (void)
497{
498#if EV_USE_EPOLL
499 if (ev_method == EVMETHOD_EPOLL)
500 epoll_postfork_child ();
501#endif
502
503 ev_io_stop (&sigev);
504 close (sigpipe [0]);
505 close (sigpipe [1]);
506 pipe (sigpipe);
507 siginit ();
508}
509
510/*****************************************************************************/
511
512static void
513call_pending (void) 1726call_pending (EV_P)
514{ 1727{
1728 int pri;
1729
1730 for (pri = NUMPRI; pri--; )
515 while (pendingcnt) 1731 while (pendingcnt [pri])
516 { 1732 {
517 ANPENDING *p = pendings + --pendingcnt; 1733 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
518 1734
519 if (p->w) 1735 if (expect_true (p->w))
1736 {
1737 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1738
1739 p->w->pending = 0;
1740 EV_CB_INVOKE (p->w, p->events);
1741 EV_FREQUENT_CHECK;
1742 }
1743 }
1744}
1745
1746#if EV_IDLE_ENABLE
1747void inline_size
1748idle_reify (EV_P)
1749{
1750 if (expect_false (idleall))
1751 {
1752 int pri;
1753
1754 for (pri = NUMPRI; pri--; )
520 { 1755 {
521 p->w->pending = 0; 1756 if (pendingcnt [pri])
522 p->w->cb (p->w, p->events); 1757 break;
1758
1759 if (idlecnt [pri])
1760 {
1761 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1762 break;
1763 }
523 } 1764 }
524 } 1765 }
525} 1766}
1767#endif
526 1768
527static void 1769void inline_size
528timers_reify (void) 1770timers_reify (EV_P)
529{ 1771{
1772 EV_FREQUENT_CHECK;
1773
530 while (timercnt && timers [0]->at <= now) 1774 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
531 { 1775 {
532 struct ev_timer *w = timers [0]; 1776 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
533 1777
534 event ((W)w, EV_TIMEOUT); 1778 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
535 1779
536 /* first reschedule or stop timer */ 1780 /* first reschedule or stop timer */
537 if (w->repeat) 1781 if (w->repeat)
538 { 1782 {
539 w->at = now + w->repeat; 1783 ev_at (w) += w->repeat;
540 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1784 if (ev_at (w) < mn_now)
1785 ev_at (w) = mn_now;
1786
1787 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1788
1789 ANHE_at_cache (timers [HEAP0]);
541 downheap ((WT *)timers, timercnt, 0); 1790 downheap (timers, timercnt, HEAP0);
542 } 1791 }
543 else 1792 else
544 ev_timer_stop (w); /* nonrepeating: stop timer */ 1793 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
545 }
546}
547 1794
548static void 1795 EV_FREQUENT_CHECK;
1796 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1797 }
1798}
1799
1800#if EV_PERIODIC_ENABLE
1801void inline_size
549periodics_reify (void) 1802periodics_reify (EV_P)
550{ 1803{
1804 EV_FREQUENT_CHECK;
1805
551 while (periodiccnt && periodics [0]->at <= ev_now) 1806 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
552 { 1807 {
553 struct ev_periodic *w = periodics [0]; 1808 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1809
1810 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
554 1811
555 /* first reschedule or stop timer */ 1812 /* first reschedule or stop timer */
556 if (w->interval) 1813 if (w->reschedule_cb)
557 { 1814 {
558 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1815 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
559 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1816
1817 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1818
1819 ANHE_at_cache (periodics [HEAP0]);
560 downheap ((WT *)periodics, periodiccnt, 0); 1820 downheap (periodics, periodiccnt, HEAP0);
1821 }
1822 else if (w->interval)
1823 {
1824 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1825 /* if next trigger time is not sufficiently in the future, put it there */
1826 /* this might happen because of floating point inexactness */
1827 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1828 {
1829 ev_at (w) += w->interval;
1830
1831 /* if interval is unreasonably low we might still have a time in the past */
1832 /* so correct this. this will make the periodic very inexact, but the user */
1833 /* has effectively asked to get triggered more often than possible */
1834 if (ev_at (w) < ev_rt_now)
1835 ev_at (w) = ev_rt_now;
1836 }
1837
1838 ANHE_at_cache (periodics [HEAP0]);
1839 downheap (periodics, periodiccnt, HEAP0);
561 } 1840 }
562 else 1841 else
563 ev_periodic_stop (w); /* nonrepeating: stop timer */ 1842 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
564 1843
565 event ((W)w, EV_TIMEOUT); 1844 EV_FREQUENT_CHECK;
1845 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
566 } 1846 }
567} 1847}
568 1848
569static void 1849static void noinline
570periodics_reschedule (ev_tstamp diff) 1850periodics_reschedule (EV_P)
571{ 1851{
572 int i; 1852 int i;
573 1853
574 /* adjust periodics after time jump */ 1854 /* adjust periodics after time jump */
575 for (i = 0; i < periodiccnt; ++i) 1855 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
576 { 1856 {
577 struct ev_periodic *w = periodics [i]; 1857 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
578 1858
1859 if (w->reschedule_cb)
1860 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
579 if (w->interval) 1861 else if (w->interval)
1862 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1863
1864 ANHE_at_cache (periodics [i]);
1865 }
1866
1867 reheap (periodics, periodiccnt);
1868}
1869#endif
1870
1871void inline_speed
1872time_update (EV_P_ ev_tstamp max_block)
1873{
1874 int i;
1875
1876#if EV_USE_MONOTONIC
1877 if (expect_true (have_monotonic))
1878 {
1879 ev_tstamp odiff = rtmn_diff;
1880
1881 mn_now = get_clock ();
1882
1883 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1884 /* interpolate in the meantime */
1885 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
580 { 1886 {
581 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1887 ev_rt_now = rtmn_diff + mn_now;
1888 return;
1889 }
582 1890
583 if (fabs (diff) >= 1e-4) 1891 now_floor = mn_now;
1892 ev_rt_now = ev_time ();
1893
1894 /* loop a few times, before making important decisions.
1895 * on the choice of "4": one iteration isn't enough,
1896 * in case we get preempted during the calls to
1897 * ev_time and get_clock. a second call is almost guaranteed
1898 * to succeed in that case, though. and looping a few more times
1899 * doesn't hurt either as we only do this on time-jumps or
1900 * in the unlikely event of having been preempted here.
1901 */
1902 for (i = 4; --i; )
1903 {
1904 rtmn_diff = ev_rt_now - mn_now;
1905
1906 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1907 return; /* all is well */
1908
1909 ev_rt_now = ev_time ();
1910 mn_now = get_clock ();
1911 now_floor = mn_now;
1912 }
1913
1914# if EV_PERIODIC_ENABLE
1915 periodics_reschedule (EV_A);
1916# endif
1917 /* no timer adjustment, as the monotonic clock doesn't jump */
1918 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1919 }
1920 else
1921#endif
1922 {
1923 ev_rt_now = ev_time ();
1924
1925 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1926 {
1927#if EV_PERIODIC_ENABLE
1928 periodics_reschedule (EV_A);
1929#endif
1930 /* adjust timers. this is easy, as the offset is the same for all of them */
1931 for (i = 0; i < timercnt; ++i)
584 { 1932 {
585 ev_periodic_stop (w); 1933 ANHE *he = timers + i + HEAP0;
586 ev_periodic_start (w); 1934 ANHE_w (*he)->at += ev_rt_now - mn_now;
587 1935 ANHE_at_cache (*he);
588 i = 0; /* restart loop, inefficient, but time jumps should be rare */
589 } 1936 }
590 } 1937 }
591 }
592}
593 1938
594static void 1939 mn_now = ev_rt_now;
595time_update (void)
596{
597 int i;
598
599 ev_now = ev_time ();
600
601 if (have_monotonic)
602 { 1940 }
603 ev_tstamp odiff = diff; 1941}
604 1942
605 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1943void
1944ev_ref (EV_P)
1945{
1946 ++activecnt;
1947}
1948
1949void
1950ev_unref (EV_P)
1951{
1952 --activecnt;
1953}
1954
1955void
1956ev_now_update (EV_P)
1957{
1958 time_update (EV_A_ 1e100);
1959}
1960
1961static int loop_done;
1962
1963void
1964ev_loop (EV_P_ int flags)
1965{
1966 loop_done = EVUNLOOP_CANCEL;
1967
1968 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1969
1970 do
1971 {
1972#if EV_VERIFY >= 2
1973 ev_loop_verify (EV_A);
1974#endif
1975
1976#ifndef _WIN32
1977 if (expect_false (curpid)) /* penalise the forking check even more */
1978 if (expect_false (getpid () != curpid))
1979 {
1980 curpid = getpid ();
1981 postfork = 1;
1982 }
1983#endif
1984
1985#if EV_FORK_ENABLE
1986 /* we might have forked, so queue fork handlers */
1987 if (expect_false (postfork))
1988 if (forkcnt)
1989 {
1990 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1991 call_pending (EV_A);
1992 }
1993#endif
1994
1995 /* queue prepare watchers (and execute them) */
1996 if (expect_false (preparecnt))
606 { 1997 {
607 now = get_clock (); 1998 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
608 diff = ev_now - now; 1999 call_pending (EV_A);
609
610 if (fabs (odiff - diff) < MIN_TIMEJUMP)
611 return; /* all is well */
612
613 ev_now = ev_time ();
614 } 2000 }
615 2001
616 periodics_reschedule (diff - odiff); 2002 if (expect_false (!activecnt))
617 /* no timer adjustment, as the monotonic clock doesn't jump */ 2003 break;
618 }
619 else
620 {
621 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
622 {
623 periodics_reschedule (ev_now - now);
624 2004
625 /* adjust timers. this is easy, as the offset is the same for all */ 2005 /* we might have forked, so reify kernel state if necessary */
626 for (i = 0; i < timercnt; ++i) 2006 if (expect_false (postfork))
627 timers [i]->at += diff; 2007 loop_fork (EV_A);
628 }
629
630 now = ev_now;
631 }
632}
633
634int ev_loop_done;
635
636void ev_loop (int flags)
637{
638 double block;
639 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
640
641 do
642 {
643 /* queue check watchers (and execute them) */
644 if (preparecnt)
645 {
646 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
647 call_pending ();
648 }
649 2008
650 /* update fd-related kernel structures */ 2009 /* update fd-related kernel structures */
651 fd_reify (); 2010 fd_reify (EV_A);
652 2011
653 /* calculate blocking time */ 2012 /* calculate blocking time */
2013 {
2014 ev_tstamp waittime = 0.;
2015 ev_tstamp sleeptime = 0.;
654 2016
655 /* we only need this for !monotonic clockor timers, but as we basically 2017 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
656 always have timers, we just calculate it always */
657 ev_now = ev_time ();
658
659 if (flags & EVLOOP_NONBLOCK || idlecnt)
660 block = 0.;
661 else
662 { 2018 {
2019 /* update time to cancel out callback processing overhead */
2020 time_update (EV_A_ 1e100);
2021
663 block = MAX_BLOCKTIME; 2022 waittime = MAX_BLOCKTIME;
664 2023
665 if (timercnt) 2024 if (timercnt)
666 { 2025 {
667 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 2026 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
668 if (block > to) block = to; 2027 if (waittime > to) waittime = to;
669 } 2028 }
670 2029
2030#if EV_PERIODIC_ENABLE
671 if (periodiccnt) 2031 if (periodiccnt)
672 { 2032 {
673 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 2033 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
674 if (block > to) block = to; 2034 if (waittime > to) waittime = to;
675 } 2035 }
2036#endif
676 2037
677 if (block < 0.) block = 0.; 2038 if (expect_false (waittime < timeout_blocktime))
2039 waittime = timeout_blocktime;
2040
2041 sleeptime = waittime - backend_fudge;
2042
2043 if (expect_true (sleeptime > io_blocktime))
2044 sleeptime = io_blocktime;
2045
2046 if (sleeptime)
2047 {
2048 ev_sleep (sleeptime);
2049 waittime -= sleeptime;
2050 }
678 } 2051 }
679 2052
680 method_poll (block); 2053 ++loop_count;
2054 backend_poll (EV_A_ waittime);
681 2055
682 /* update ev_now, do magic */ 2056 /* update ev_rt_now, do magic */
683 time_update (); 2057 time_update (EV_A_ waittime + sleeptime);
2058 }
684 2059
685 /* queue pending timers and reschedule them */ 2060 /* queue pending timers and reschedule them */
686 timers_reify (); /* relative timers called last */ 2061 timers_reify (EV_A); /* relative timers called last */
2062#if EV_PERIODIC_ENABLE
687 periodics_reify (); /* absolute timers called first */ 2063 periodics_reify (EV_A); /* absolute timers called first */
2064#endif
688 2065
2066#if EV_IDLE_ENABLE
689 /* queue idle watchers unless io or timers are pending */ 2067 /* queue idle watchers unless other events are pending */
690 if (!pendingcnt) 2068 idle_reify (EV_A);
691 queue_events ((W *)idles, idlecnt, EV_IDLE); 2069#endif
692 2070
693 /* queue check watchers, to be executed first */ 2071 /* queue check watchers, to be executed first */
694 if (checkcnt) 2072 if (expect_false (checkcnt))
695 queue_events ((W *)checks, checkcnt, EV_CHECK); 2073 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
696 2074
697 call_pending (); 2075 call_pending (EV_A);
698 } 2076 }
699 while (!ev_loop_done); 2077 while (expect_true (
2078 activecnt
2079 && !loop_done
2080 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2081 ));
700 2082
701 if (ev_loop_done != 2) 2083 if (loop_done == EVUNLOOP_ONE)
2084 loop_done = EVUNLOOP_CANCEL;
2085}
2086
2087void
2088ev_unloop (EV_P_ int how)
2089{
702 ev_loop_done = 0; 2090 loop_done = how;
703} 2091}
704 2092
705/*****************************************************************************/ 2093/*****************************************************************************/
706 2094
707static void 2095void inline_size
708wlist_add (WL *head, WL elem) 2096wlist_add (WL *head, WL elem)
709{ 2097{
710 elem->next = *head; 2098 elem->next = *head;
711 *head = elem; 2099 *head = elem;
712} 2100}
713 2101
714static void 2102void inline_size
715wlist_del (WL *head, WL elem) 2103wlist_del (WL *head, WL elem)
716{ 2104{
717 while (*head) 2105 while (*head)
718 { 2106 {
719 if (*head == elem) 2107 if (*head == elem)
… …
724 2112
725 head = &(*head)->next; 2113 head = &(*head)->next;
726 } 2114 }
727} 2115}
728 2116
729static void 2117void inline_speed
730ev_clear (W w) 2118clear_pending (EV_P_ W w)
731{ 2119{
732 if (w->pending) 2120 if (w->pending)
733 { 2121 {
734 pendings [w->pending - 1].w = 0; 2122 pendings [ABSPRI (w)][w->pending - 1].w = 0;
735 w->pending = 0; 2123 w->pending = 0;
736 } 2124 }
737} 2125}
738 2126
739static void 2127int
2128ev_clear_pending (EV_P_ void *w)
2129{
2130 W w_ = (W)w;
2131 int pending = w_->pending;
2132
2133 if (expect_true (pending))
2134 {
2135 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2136 w_->pending = 0;
2137 p->w = 0;
2138 return p->events;
2139 }
2140 else
2141 return 0;
2142}
2143
2144void inline_size
2145pri_adjust (EV_P_ W w)
2146{
2147 int pri = w->priority;
2148 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2149 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2150 w->priority = pri;
2151}
2152
2153void inline_speed
740ev_start (W w, int active) 2154ev_start (EV_P_ W w, int active)
741{ 2155{
2156 pri_adjust (EV_A_ w);
742 w->active = active; 2157 w->active = active;
2158 ev_ref (EV_A);
743} 2159}
744 2160
745static void 2161void inline_size
746ev_stop (W w) 2162ev_stop (EV_P_ W w)
747{ 2163{
2164 ev_unref (EV_A);
748 w->active = 0; 2165 w->active = 0;
749} 2166}
750 2167
751/*****************************************************************************/ 2168/*****************************************************************************/
752 2169
753void 2170void noinline
754ev_io_start (struct ev_io *w) 2171ev_io_start (EV_P_ ev_io *w)
755{ 2172{
2173 int fd = w->fd;
2174
756 if (ev_is_active (w)) 2175 if (expect_false (ev_is_active (w)))
757 return; 2176 return;
758 2177
759 int fd = w->fd; 2178 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2179 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
760 2180
2181 EV_FREQUENT_CHECK;
2182
761 ev_start ((W)w, 1); 2183 ev_start (EV_A_ (W)w, 1);
762 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2184 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
763 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2185 wlist_add (&anfds[fd].head, (WL)w);
764 2186
765 fd_change (fd); 2187 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
766} 2188 w->events &= ~EV__IOFDSET;
767 2189
768void 2190 EV_FREQUENT_CHECK;
2191}
2192
2193void noinline
769ev_io_stop (struct ev_io *w) 2194ev_io_stop (EV_P_ ev_io *w)
770{ 2195{
771 ev_clear ((W)w); 2196 clear_pending (EV_A_ (W)w);
772 if (!ev_is_active (w)) 2197 if (expect_false (!ev_is_active (w)))
773 return; 2198 return;
774 2199
2200 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2201
2202 EV_FREQUENT_CHECK;
2203
775 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2204 wlist_del (&anfds[w->fd].head, (WL)w);
776 ev_stop ((W)w); 2205 ev_stop (EV_A_ (W)w);
777 2206
778 fd_change (w->fd); 2207 fd_change (EV_A_ w->fd, 1);
779}
780 2208
781void 2209 EV_FREQUENT_CHECK;
2210}
2211
2212void noinline
782ev_timer_start (struct ev_timer *w) 2213ev_timer_start (EV_P_ ev_timer *w)
783{ 2214{
784 if (ev_is_active (w)) 2215 if (expect_false (ev_is_active (w)))
785 return; 2216 return;
786 2217
787 w->at += now; 2218 ev_at (w) += mn_now;
788 2219
789 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 2220 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
790 2221
791 ev_start ((W)w, ++timercnt); 2222 EV_FREQUENT_CHECK;
792 array_needsize (timers, timermax, timercnt, );
793 timers [timercnt - 1] = w;
794 upheap ((WT *)timers, timercnt - 1);
795}
796 2223
797void 2224 ++timercnt;
2225 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2226 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2227 ANHE_w (timers [ev_active (w)]) = (WT)w;
2228 ANHE_at_cache (timers [ev_active (w)]);
2229 upheap (timers, ev_active (w));
2230
2231 EV_FREQUENT_CHECK;
2232
2233 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2234}
2235
2236void noinline
798ev_timer_stop (struct ev_timer *w) 2237ev_timer_stop (EV_P_ ev_timer *w)
799{ 2238{
800 ev_clear ((W)w); 2239 clear_pending (EV_A_ (W)w);
801 if (!ev_is_active (w)) 2240 if (expect_false (!ev_is_active (w)))
802 return; 2241 return;
803 2242
804 if (w->active < timercnt--) 2243 EV_FREQUENT_CHECK;
2244
2245 {
2246 int active = ev_active (w);
2247
2248 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2249
2250 --timercnt;
2251
2252 if (expect_true (active < timercnt + HEAP0))
805 { 2253 {
806 timers [w->active - 1] = timers [timercnt]; 2254 timers [active] = timers [timercnt + HEAP0];
807 downheap ((WT *)timers, timercnt, w->active - 1); 2255 adjustheap (timers, timercnt, active);
808 } 2256 }
2257 }
809 2258
810 w->at = w->repeat; 2259 EV_FREQUENT_CHECK;
811 2260
2261 ev_at (w) -= mn_now;
2262
812 ev_stop ((W)w); 2263 ev_stop (EV_A_ (W)w);
813} 2264}
814 2265
815void 2266void noinline
816ev_timer_again (struct ev_timer *w) 2267ev_timer_again (EV_P_ ev_timer *w)
817{ 2268{
2269 EV_FREQUENT_CHECK;
2270
818 if (ev_is_active (w)) 2271 if (ev_is_active (w))
819 { 2272 {
820 if (w->repeat) 2273 if (w->repeat)
821 { 2274 {
822 w->at = now + w->repeat; 2275 ev_at (w) = mn_now + w->repeat;
2276 ANHE_at_cache (timers [ev_active (w)]);
823 downheap ((WT *)timers, timercnt, w->active - 1); 2277 adjustheap (timers, timercnt, ev_active (w));
824 } 2278 }
825 else 2279 else
826 ev_timer_stop (w); 2280 ev_timer_stop (EV_A_ w);
827 } 2281 }
828 else if (w->repeat) 2282 else if (w->repeat)
2283 {
2284 ev_at (w) = w->repeat;
829 ev_timer_start (w); 2285 ev_timer_start (EV_A_ w);
830} 2286 }
831 2287
832void 2288 EV_FREQUENT_CHECK;
2289}
2290
2291#if EV_PERIODIC_ENABLE
2292void noinline
833ev_periodic_start (struct ev_periodic *w) 2293ev_periodic_start (EV_P_ ev_periodic *w)
834{ 2294{
835 if (ev_is_active (w)) 2295 if (expect_false (ev_is_active (w)))
836 return; 2296 return;
837 2297
838 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 2298 if (w->reschedule_cb)
839 2299 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2300 else if (w->interval)
2301 {
2302 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
840 /* this formula differs from the one in periodic_reify because we do not always round up */ 2303 /* this formula differs from the one in periodic_reify because we do not always round up */
841 if (w->interval)
842 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 2304 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2305 }
2306 else
2307 ev_at (w) = w->offset;
843 2308
2309 EV_FREQUENT_CHECK;
2310
2311 ++periodiccnt;
844 ev_start ((W)w, ++periodiccnt); 2312 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
845 array_needsize (periodics, periodicmax, periodiccnt, ); 2313 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
846 periodics [periodiccnt - 1] = w; 2314 ANHE_w (periodics [ev_active (w)]) = (WT)w;
847 upheap ((WT *)periodics, periodiccnt - 1); 2315 ANHE_at_cache (periodics [ev_active (w)]);
848} 2316 upheap (periodics, ev_active (w));
849 2317
850void 2318 EV_FREQUENT_CHECK;
2319
2320 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2321}
2322
2323void noinline
851ev_periodic_stop (struct ev_periodic *w) 2324ev_periodic_stop (EV_P_ ev_periodic *w)
852{ 2325{
853 ev_clear ((W)w); 2326 clear_pending (EV_A_ (W)w);
854 if (!ev_is_active (w)) 2327 if (expect_false (!ev_is_active (w)))
855 return; 2328 return;
856 2329
857 if (w->active < periodiccnt--) 2330 EV_FREQUENT_CHECK;
2331
2332 {
2333 int active = ev_active (w);
2334
2335 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2336
2337 --periodiccnt;
2338
2339 if (expect_true (active < periodiccnt + HEAP0))
858 { 2340 {
859 periodics [w->active - 1] = periodics [periodiccnt]; 2341 periodics [active] = periodics [periodiccnt + HEAP0];
860 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2342 adjustheap (periodics, periodiccnt, active);
861 } 2343 }
2344 }
862 2345
2346 EV_FREQUENT_CHECK;
2347
863 ev_stop ((W)w); 2348 ev_stop (EV_A_ (W)w);
864} 2349}
865 2350
866void 2351void noinline
2352ev_periodic_again (EV_P_ ev_periodic *w)
2353{
2354 /* TODO: use adjustheap and recalculation */
2355 ev_periodic_stop (EV_A_ w);
2356 ev_periodic_start (EV_A_ w);
2357}
2358#endif
2359
2360#ifndef SA_RESTART
2361# define SA_RESTART 0
2362#endif
2363
2364void noinline
867ev_signal_start (struct ev_signal *w) 2365ev_signal_start (EV_P_ ev_signal *w)
868{ 2366{
2367#if EV_MULTIPLICITY
2368 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2369#endif
869 if (ev_is_active (w)) 2370 if (expect_false (ev_is_active (w)))
870 return; 2371 return;
871 2372
2373 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2374
2375 evpipe_init (EV_A);
2376
2377 EV_FREQUENT_CHECK;
2378
2379 {
2380#ifndef _WIN32
2381 sigset_t full, prev;
2382 sigfillset (&full);
2383 sigprocmask (SIG_SETMASK, &full, &prev);
2384#endif
2385
2386 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2387
2388#ifndef _WIN32
2389 sigprocmask (SIG_SETMASK, &prev, 0);
2390#endif
2391 }
2392
872 ev_start ((W)w, 1); 2393 ev_start (EV_A_ (W)w, 1);
873 array_needsize (signals, signalmax, w->signum, signals_init);
874 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2394 wlist_add (&signals [w->signum - 1].head, (WL)w);
875 2395
876 if (!w->next) 2396 if (!((WL)w)->next)
877 { 2397 {
2398#if _WIN32
2399 signal (w->signum, ev_sighandler);
2400#else
878 struct sigaction sa; 2401 struct sigaction sa;
879 sa.sa_handler = sighandler; 2402 sa.sa_handler = ev_sighandler;
880 sigfillset (&sa.sa_mask); 2403 sigfillset (&sa.sa_mask);
881 sa.sa_flags = 0; 2404 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
882 sigaction (w->signum, &sa, 0); 2405 sigaction (w->signum, &sa, 0);
2406#endif
883 } 2407 }
884}
885 2408
886void 2409 EV_FREQUENT_CHECK;
2410}
2411
2412void noinline
887ev_signal_stop (struct ev_signal *w) 2413ev_signal_stop (EV_P_ ev_signal *w)
888{ 2414{
889 ev_clear ((W)w); 2415 clear_pending (EV_A_ (W)w);
890 if (!ev_is_active (w)) 2416 if (expect_false (!ev_is_active (w)))
891 return; 2417 return;
892 2418
2419 EV_FREQUENT_CHECK;
2420
893 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2421 wlist_del (&signals [w->signum - 1].head, (WL)w);
894 ev_stop ((W)w); 2422 ev_stop (EV_A_ (W)w);
895 2423
896 if (!signals [w->signum - 1].head) 2424 if (!signals [w->signum - 1].head)
897 signal (w->signum, SIG_DFL); 2425 signal (w->signum, SIG_DFL);
898}
899 2426
2427 EV_FREQUENT_CHECK;
2428}
2429
900void 2430void
901ev_idle_start (struct ev_idle *w) 2431ev_child_start (EV_P_ ev_child *w)
902{ 2432{
2433#if EV_MULTIPLICITY
2434 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2435#endif
903 if (ev_is_active (w)) 2436 if (expect_false (ev_is_active (w)))
904 return; 2437 return;
905 2438
906 ev_start ((W)w, ++idlecnt); 2439 EV_FREQUENT_CHECK;
907 array_needsize (idles, idlemax, idlecnt, );
908 idles [idlecnt - 1] = w;
909}
910 2440
2441 ev_start (EV_A_ (W)w, 1);
2442 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2443
2444 EV_FREQUENT_CHECK;
2445}
2446
911void 2447void
912ev_idle_stop (struct ev_idle *w) 2448ev_child_stop (EV_P_ ev_child *w)
913{ 2449{
914 ev_clear ((W)w); 2450 clear_pending (EV_A_ (W)w);
915 if (ev_is_active (w)) 2451 if (expect_false (!ev_is_active (w)))
916 return; 2452 return;
917 2453
918 idles [w->active - 1] = idles [--idlecnt]; 2454 EV_FREQUENT_CHECK;
2455
2456 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
919 ev_stop ((W)w); 2457 ev_stop (EV_A_ (W)w);
920}
921 2458
922void 2459 EV_FREQUENT_CHECK;
923ev_prepare_start (struct ev_prepare *w) 2460}
2461
2462#if EV_STAT_ENABLE
2463
2464# ifdef _WIN32
2465# undef lstat
2466# define lstat(a,b) _stati64 (a,b)
2467# endif
2468
2469#define DEF_STAT_INTERVAL 5.0074891
2470#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2471#define MIN_STAT_INTERVAL 0.1074891
2472
2473static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2474
2475#if EV_USE_INOTIFY
2476# define EV_INOTIFY_BUFSIZE 8192
2477
2478static void noinline
2479infy_add (EV_P_ ev_stat *w)
924{ 2480{
925 if (ev_is_active (w)) 2481 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);
2482
2483 if (w->wd < 0)
2484 {
2485 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2486 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2487
2488 /* monitor some parent directory for speedup hints */
2489 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2490 /* but an efficiency issue only */
2491 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2492 {
2493 char path [4096];
2494 strcpy (path, w->path);
2495
2496 do
2497 {
2498 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2499 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2500
2501 char *pend = strrchr (path, '/');
2502
2503 if (!pend || pend == path)
2504 break;
2505
2506 *pend = 0;
2507 w->wd = inotify_add_watch (fs_fd, path, mask);
2508 }
2509 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2510 }
2511 }
2512
2513 if (w->wd >= 0)
2514 {
2515 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2516
2517 /* now local changes will be tracked by inotify, but remote changes won't */
2518 /* unless the filesystem it known to be local, we therefore still poll */
2519 /* also do poll on <2.6.25, but with normal frequency */
2520 struct statfs sfs;
2521
2522 if (fs_2625 && !statfs (w->path, &sfs))
2523 if (sfs.f_type == 0x1373 /* devfs */
2524 || sfs.f_type == 0xEF53 /* ext2/3 */
2525 || sfs.f_type == 0x3153464a /* jfs */
2526 || sfs.f_type == 0x52654973 /* reiser3 */
2527 || sfs.f_type == 0x01021994 /* tempfs */
2528 || sfs.f_type == 0x58465342 /* xfs */)
2529 return;
2530
2531 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2532 ev_timer_again (EV_A_ &w->timer);
2533 }
2534}
2535
2536static void noinline
2537infy_del (EV_P_ ev_stat *w)
2538{
2539 int slot;
2540 int wd = w->wd;
2541
2542 if (wd < 0)
926 return; 2543 return;
927 2544
2545 w->wd = -2;
2546 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2547 wlist_del (&fs_hash [slot].head, (WL)w);
2548
2549 /* remove this watcher, if others are watching it, they will rearm */
2550 inotify_rm_watch (fs_fd, wd);
2551}
2552
2553static void noinline
2554infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2555{
2556 if (slot < 0)
2557 /* overflow, need to check for all hash slots */
2558 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2559 infy_wd (EV_A_ slot, wd, ev);
2560 else
2561 {
2562 WL w_;
2563
2564 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2565 {
2566 ev_stat *w = (ev_stat *)w_;
2567 w_ = w_->next; /* lets us remove this watcher and all before it */
2568
2569 if (w->wd == wd || wd == -1)
2570 {
2571 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2572 {
2573 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2574 w->wd = -1;
2575 infy_add (EV_A_ w); /* re-add, no matter what */
2576 }
2577
2578 stat_timer_cb (EV_A_ &w->timer, 0);
2579 }
2580 }
2581 }
2582}
2583
2584static void
2585infy_cb (EV_P_ ev_io *w, int revents)
2586{
2587 char buf [EV_INOTIFY_BUFSIZE];
2588 struct inotify_event *ev = (struct inotify_event *)buf;
2589 int ofs;
2590 int len = read (fs_fd, buf, sizeof (buf));
2591
2592 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2593 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2594}
2595
2596void inline_size
2597check_2625 (EV_P)
2598{
2599 /* kernels < 2.6.25 are borked
2600 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2601 */
2602 struct utsname buf;
2603 int major, minor, micro;
2604
2605 if (uname (&buf))
2606 return;
2607
2608 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2609 return;
2610
2611 if (major < 2
2612 || (major == 2 && minor < 6)
2613 || (major == 2 && minor == 6 && micro < 25))
2614 return;
2615
2616 fs_2625 = 1;
2617}
2618
2619void inline_size
2620infy_init (EV_P)
2621{
2622 if (fs_fd != -2)
2623 return;
2624
2625 fs_fd = -1;
2626
2627 check_2625 (EV_A);
2628
2629 fs_fd = inotify_init ();
2630
2631 if (fs_fd >= 0)
2632 {
2633 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2634 ev_set_priority (&fs_w, EV_MAXPRI);
2635 ev_io_start (EV_A_ &fs_w);
2636 }
2637}
2638
2639void inline_size
2640infy_fork (EV_P)
2641{
2642 int slot;
2643
2644 if (fs_fd < 0)
2645 return;
2646
2647 close (fs_fd);
2648 fs_fd = inotify_init ();
2649
2650 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2651 {
2652 WL w_ = fs_hash [slot].head;
2653 fs_hash [slot].head = 0;
2654
2655 while (w_)
2656 {
2657 ev_stat *w = (ev_stat *)w_;
2658 w_ = w_->next; /* lets us add this watcher */
2659
2660 w->wd = -1;
2661
2662 if (fs_fd >= 0)
2663 infy_add (EV_A_ w); /* re-add, no matter what */
2664 else
2665 ev_timer_again (EV_A_ &w->timer);
2666 }
2667 }
2668}
2669
2670#endif
2671
2672#ifdef _WIN32
2673# define EV_LSTAT(p,b) _stati64 (p, b)
2674#else
2675# define EV_LSTAT(p,b) lstat (p, b)
2676#endif
2677
2678void
2679ev_stat_stat (EV_P_ ev_stat *w)
2680{
2681 if (lstat (w->path, &w->attr) < 0)
2682 w->attr.st_nlink = 0;
2683 else if (!w->attr.st_nlink)
2684 w->attr.st_nlink = 1;
2685}
2686
2687static void noinline
2688stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2689{
2690 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2691
2692 /* we copy this here each the time so that */
2693 /* prev has the old value when the callback gets invoked */
2694 w->prev = w->attr;
2695 ev_stat_stat (EV_A_ w);
2696
2697 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2698 if (
2699 w->prev.st_dev != w->attr.st_dev
2700 || w->prev.st_ino != w->attr.st_ino
2701 || w->prev.st_mode != w->attr.st_mode
2702 || w->prev.st_nlink != w->attr.st_nlink
2703 || w->prev.st_uid != w->attr.st_uid
2704 || w->prev.st_gid != w->attr.st_gid
2705 || w->prev.st_rdev != w->attr.st_rdev
2706 || w->prev.st_size != w->attr.st_size
2707 || w->prev.st_atime != w->attr.st_atime
2708 || w->prev.st_mtime != w->attr.st_mtime
2709 || w->prev.st_ctime != w->attr.st_ctime
2710 ) {
2711 #if EV_USE_INOTIFY
2712 if (fs_fd >= 0)
2713 {
2714 infy_del (EV_A_ w);
2715 infy_add (EV_A_ w);
2716 ev_stat_stat (EV_A_ w); /* avoid race... */
2717 }
2718 #endif
2719
2720 ev_feed_event (EV_A_ w, EV_STAT);
2721 }
2722}
2723
2724void
2725ev_stat_start (EV_P_ ev_stat *w)
2726{
2727 if (expect_false (ev_is_active (w)))
2728 return;
2729
2730 ev_stat_stat (EV_A_ w);
2731
2732 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2733 w->interval = MIN_STAT_INTERVAL;
2734
2735 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2736 ev_set_priority (&w->timer, ev_priority (w));
2737
2738#if EV_USE_INOTIFY
2739 infy_init (EV_A);
2740
2741 if (fs_fd >= 0)
2742 infy_add (EV_A_ w);
2743 else
2744#endif
2745 ev_timer_again (EV_A_ &w->timer);
2746
2747 ev_start (EV_A_ (W)w, 1);
2748
2749 EV_FREQUENT_CHECK;
2750}
2751
2752void
2753ev_stat_stop (EV_P_ ev_stat *w)
2754{
2755 clear_pending (EV_A_ (W)w);
2756 if (expect_false (!ev_is_active (w)))
2757 return;
2758
2759 EV_FREQUENT_CHECK;
2760
2761#if EV_USE_INOTIFY
2762 infy_del (EV_A_ w);
2763#endif
2764 ev_timer_stop (EV_A_ &w->timer);
2765
2766 ev_stop (EV_A_ (W)w);
2767
2768 EV_FREQUENT_CHECK;
2769}
2770#endif
2771
2772#if EV_IDLE_ENABLE
2773void
2774ev_idle_start (EV_P_ ev_idle *w)
2775{
2776 if (expect_false (ev_is_active (w)))
2777 return;
2778
2779 pri_adjust (EV_A_ (W)w);
2780
2781 EV_FREQUENT_CHECK;
2782
2783 {
2784 int active = ++idlecnt [ABSPRI (w)];
2785
2786 ++idleall;
2787 ev_start (EV_A_ (W)w, active);
2788
2789 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2790 idles [ABSPRI (w)][active - 1] = w;
2791 }
2792
2793 EV_FREQUENT_CHECK;
2794}
2795
2796void
2797ev_idle_stop (EV_P_ ev_idle *w)
2798{
2799 clear_pending (EV_A_ (W)w);
2800 if (expect_false (!ev_is_active (w)))
2801 return;
2802
2803 EV_FREQUENT_CHECK;
2804
2805 {
2806 int active = ev_active (w);
2807
2808 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2809 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2810
2811 ev_stop (EV_A_ (W)w);
2812 --idleall;
2813 }
2814
2815 EV_FREQUENT_CHECK;
2816}
2817#endif
2818
2819void
2820ev_prepare_start (EV_P_ ev_prepare *w)
2821{
2822 if (expect_false (ev_is_active (w)))
2823 return;
2824
2825 EV_FREQUENT_CHECK;
2826
928 ev_start ((W)w, ++preparecnt); 2827 ev_start (EV_A_ (W)w, ++preparecnt);
929 array_needsize (prepares, preparemax, preparecnt, ); 2828 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
930 prepares [preparecnt - 1] = w; 2829 prepares [preparecnt - 1] = w;
931}
932 2830
2831 EV_FREQUENT_CHECK;
2832}
2833
933void 2834void
934ev_prepare_stop (struct ev_prepare *w) 2835ev_prepare_stop (EV_P_ ev_prepare *w)
935{ 2836{
936 ev_clear ((W)w); 2837 clear_pending (EV_A_ (W)w);
937 if (ev_is_active (w)) 2838 if (expect_false (!ev_is_active (w)))
938 return; 2839 return;
939 2840
2841 EV_FREQUENT_CHECK;
2842
2843 {
2844 int active = ev_active (w);
2845
940 prepares [w->active - 1] = prepares [--preparecnt]; 2846 prepares [active - 1] = prepares [--preparecnt];
2847 ev_active (prepares [active - 1]) = active;
2848 }
2849
941 ev_stop ((W)w); 2850 ev_stop (EV_A_ (W)w);
942}
943 2851
2852 EV_FREQUENT_CHECK;
2853}
2854
944void 2855void
945ev_check_start (struct ev_check *w) 2856ev_check_start (EV_P_ ev_check *w)
946{ 2857{
947 if (ev_is_active (w)) 2858 if (expect_false (ev_is_active (w)))
948 return; 2859 return;
949 2860
2861 EV_FREQUENT_CHECK;
2862
950 ev_start ((W)w, ++checkcnt); 2863 ev_start (EV_A_ (W)w, ++checkcnt);
951 array_needsize (checks, checkmax, checkcnt, ); 2864 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
952 checks [checkcnt - 1] = w; 2865 checks [checkcnt - 1] = w;
953}
954 2866
2867 EV_FREQUENT_CHECK;
2868}
2869
955void 2870void
956ev_check_stop (struct ev_check *w) 2871ev_check_stop (EV_P_ ev_check *w)
957{ 2872{
958 ev_clear ((W)w); 2873 clear_pending (EV_A_ (W)w);
959 if (ev_is_active (w)) 2874 if (expect_false (!ev_is_active (w)))
960 return; 2875 return;
961 2876
2877 EV_FREQUENT_CHECK;
2878
2879 {
2880 int active = ev_active (w);
2881
962 checks [w->active - 1] = checks [--checkcnt]; 2882 checks [active - 1] = checks [--checkcnt];
2883 ev_active (checks [active - 1]) = active;
2884 }
2885
963 ev_stop ((W)w); 2886 ev_stop (EV_A_ (W)w);
964}
965 2887
966void 2888 EV_FREQUENT_CHECK;
967ev_child_start (struct ev_child *w) 2889}
2890
2891#if EV_EMBED_ENABLE
2892void noinline
2893ev_embed_sweep (EV_P_ ev_embed *w)
968{ 2894{
2895 ev_loop (w->other, EVLOOP_NONBLOCK);
2896}
2897
2898static void
2899embed_io_cb (EV_P_ ev_io *io, int revents)
2900{
2901 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2902
969 if (ev_is_active (w)) 2903 if (ev_cb (w))
2904 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2905 else
2906 ev_loop (w->other, EVLOOP_NONBLOCK);
2907}
2908
2909static void
2910embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2911{
2912 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2913
2914 {
2915 struct ev_loop *loop = w->other;
2916
2917 while (fdchangecnt)
2918 {
2919 fd_reify (EV_A);
2920 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2921 }
2922 }
2923}
2924
2925static void
2926embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2927{
2928 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2929
2930 ev_embed_stop (EV_A_ w);
2931
2932 {
2933 struct ev_loop *loop = w->other;
2934
2935 ev_loop_fork (EV_A);
2936 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2937 }
2938
2939 ev_embed_start (EV_A_ w);
2940}
2941
2942#if 0
2943static void
2944embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2945{
2946 ev_idle_stop (EV_A_ idle);
2947}
2948#endif
2949
2950void
2951ev_embed_start (EV_P_ ev_embed *w)
2952{
2953 if (expect_false (ev_is_active (w)))
970 return; 2954 return;
971 2955
2956 {
2957 struct ev_loop *loop = w->other;
2958 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2959 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2960 }
2961
2962 EV_FREQUENT_CHECK;
2963
2964 ev_set_priority (&w->io, ev_priority (w));
2965 ev_io_start (EV_A_ &w->io);
2966
2967 ev_prepare_init (&w->prepare, embed_prepare_cb);
2968 ev_set_priority (&w->prepare, EV_MINPRI);
2969 ev_prepare_start (EV_A_ &w->prepare);
2970
2971 ev_fork_init (&w->fork, embed_fork_cb);
2972 ev_fork_start (EV_A_ &w->fork);
2973
2974 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2975
972 ev_start ((W)w, 1); 2976 ev_start (EV_A_ (W)w, 1);
973 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
974}
975 2977
2978 EV_FREQUENT_CHECK;
2979}
2980
976void 2981void
977ev_child_stop (struct ev_child *w) 2982ev_embed_stop (EV_P_ ev_embed *w)
978{ 2983{
979 ev_clear ((W)w); 2984 clear_pending (EV_A_ (W)w);
980 if (ev_is_active (w)) 2985 if (expect_false (!ev_is_active (w)))
981 return; 2986 return;
982 2987
983 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2988 EV_FREQUENT_CHECK;
2989
2990 ev_io_stop (EV_A_ &w->io);
2991 ev_prepare_stop (EV_A_ &w->prepare);
2992 ev_fork_stop (EV_A_ &w->fork);
2993
2994 EV_FREQUENT_CHECK;
2995}
2996#endif
2997
2998#if EV_FORK_ENABLE
2999void
3000ev_fork_start (EV_P_ ev_fork *w)
3001{
3002 if (expect_false (ev_is_active (w)))
3003 return;
3004
3005 EV_FREQUENT_CHECK;
3006
3007 ev_start (EV_A_ (W)w, ++forkcnt);
3008 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3009 forks [forkcnt - 1] = w;
3010
3011 EV_FREQUENT_CHECK;
3012}
3013
3014void
3015ev_fork_stop (EV_P_ ev_fork *w)
3016{
3017 clear_pending (EV_A_ (W)w);
3018 if (expect_false (!ev_is_active (w)))
3019 return;
3020
3021 EV_FREQUENT_CHECK;
3022
3023 {
3024 int active = ev_active (w);
3025
3026 forks [active - 1] = forks [--forkcnt];
3027 ev_active (forks [active - 1]) = active;
3028 }
3029
984 ev_stop ((W)w); 3030 ev_stop (EV_A_ (W)w);
3031
3032 EV_FREQUENT_CHECK;
985} 3033}
3034#endif
3035
3036#if EV_ASYNC_ENABLE
3037void
3038ev_async_start (EV_P_ ev_async *w)
3039{
3040 if (expect_false (ev_is_active (w)))
3041 return;
3042
3043 evpipe_init (EV_A);
3044
3045 EV_FREQUENT_CHECK;
3046
3047 ev_start (EV_A_ (W)w, ++asynccnt);
3048 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3049 asyncs [asynccnt - 1] = w;
3050
3051 EV_FREQUENT_CHECK;
3052}
3053
3054void
3055ev_async_stop (EV_P_ ev_async *w)
3056{
3057 clear_pending (EV_A_ (W)w);
3058 if (expect_false (!ev_is_active (w)))
3059 return;
3060
3061 EV_FREQUENT_CHECK;
3062
3063 {
3064 int active = ev_active (w);
3065
3066 asyncs [active - 1] = asyncs [--asynccnt];
3067 ev_active (asyncs [active - 1]) = active;
3068 }
3069
3070 ev_stop (EV_A_ (W)w);
3071
3072 EV_FREQUENT_CHECK;
3073}
3074
3075void
3076ev_async_send (EV_P_ ev_async *w)
3077{
3078 w->sent = 1;
3079 evpipe_write (EV_A_ &gotasync);
3080}
3081#endif
986 3082
987/*****************************************************************************/ 3083/*****************************************************************************/
988 3084
989struct ev_once 3085struct ev_once
990{ 3086{
991 struct ev_io io; 3087 ev_io io;
992 struct ev_timer to; 3088 ev_timer to;
993 void (*cb)(int revents, void *arg); 3089 void (*cb)(int revents, void *arg);
994 void *arg; 3090 void *arg;
995}; 3091};
996 3092
997static void 3093static void
998once_cb (struct ev_once *once, int revents) 3094once_cb (EV_P_ struct ev_once *once, int revents)
999{ 3095{
1000 void (*cb)(int revents, void *arg) = once->cb; 3096 void (*cb)(int revents, void *arg) = once->cb;
1001 void *arg = once->arg; 3097 void *arg = once->arg;
1002 3098
1003 ev_io_stop (&once->io); 3099 ev_io_stop (EV_A_ &once->io);
1004 ev_timer_stop (&once->to); 3100 ev_timer_stop (EV_A_ &once->to);
1005 free (once); 3101 ev_free (once);
1006 3102
1007 cb (revents, arg); 3103 cb (revents, arg);
1008} 3104}
1009 3105
1010static void 3106static void
1011once_cb_io (struct ev_io *w, int revents) 3107once_cb_io (EV_P_ ev_io *w, int revents)
1012{ 3108{
1013 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3109 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3110
3111 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1014} 3112}
1015 3113
1016static void 3114static void
1017once_cb_to (struct ev_timer *w, int revents) 3115once_cb_to (EV_P_ ev_timer *w, int revents)
1018{ 3116{
1019 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3117 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
1020}
1021 3118
3119 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3120}
3121
1022void 3122void
1023ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3123ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1024{ 3124{
1025 struct ev_once *once = malloc (sizeof (struct ev_once)); 3125 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1026 3126
1027 if (!once) 3127 if (expect_false (!once))
3128 {
1028 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3129 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1029 else 3130 return;
1030 { 3131 }
3132
1031 once->cb = cb; 3133 once->cb = cb;
1032 once->arg = arg; 3134 once->arg = arg;
1033 3135
1034 ev_watcher_init (&once->io, once_cb_io); 3136 ev_init (&once->io, once_cb_io);
1035 if (fd >= 0) 3137 if (fd >= 0)
3138 {
3139 ev_io_set (&once->io, fd, events);
3140 ev_io_start (EV_A_ &once->io);
3141 }
3142
3143 ev_init (&once->to, once_cb_to);
3144 if (timeout >= 0.)
3145 {
3146 ev_timer_set (&once->to, timeout, 0.);
3147 ev_timer_start (EV_A_ &once->to);
3148 }
3149}
3150
3151/*****************************************************************************/
3152
3153#if 0
3154void
3155ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3156{
3157 int i, j;
3158 ev_watcher_list *wl, *wn;
3159
3160 if (types & (EV_IO | EV_EMBED))
3161 for (i = 0; i < anfdmax; ++i)
3162 for (wl = anfds [i].head; wl; )
1036 { 3163 {
1037 ev_io_set (&once->io, fd, events); 3164 wn = wl->next;
1038 ev_io_start (&once->io); 3165
3166#if EV_EMBED_ENABLE
3167 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3168 {
3169 if (types & EV_EMBED)
3170 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3171 }
3172 else
3173#endif
3174#if EV_USE_INOTIFY
3175 if (ev_cb ((ev_io *)wl) == infy_cb)
3176 ;
3177 else
3178#endif
3179 if ((ev_io *)wl != &pipeev)
3180 if (types & EV_IO)
3181 cb (EV_A_ EV_IO, wl);
3182
3183 wl = wn;
1039 } 3184 }
1040 3185
1041 ev_watcher_init (&once->to, once_cb_to); 3186 if (types & (EV_TIMER | EV_STAT))
1042 if (timeout >= 0.) 3187 for (i = timercnt + HEAP0; i-- > HEAP0; )
3188#if EV_STAT_ENABLE
3189 /*TODO: timer is not always active*/
3190 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1043 { 3191 {
1044 ev_timer_set (&once->to, timeout, 0.); 3192 if (types & EV_STAT)
1045 ev_timer_start (&once->to); 3193 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1046 } 3194 }
1047 } 3195 else
1048} 3196#endif
3197 if (types & EV_TIMER)
3198 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1049 3199
1050/*****************************************************************************/ 3200#if EV_PERIODIC_ENABLE
3201 if (types & EV_PERIODIC)
3202 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3203 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3204#endif
1051 3205
1052#if 0 3206#if EV_IDLE_ENABLE
3207 if (types & EV_IDLE)
3208 for (j = NUMPRI; i--; )
3209 for (i = idlecnt [j]; i--; )
3210 cb (EV_A_ EV_IDLE, idles [j][i]);
3211#endif
1053 3212
1054struct ev_io wio; 3213#if EV_FORK_ENABLE
3214 if (types & EV_FORK)
3215 for (i = forkcnt; i--; )
3216 if (ev_cb (forks [i]) != embed_fork_cb)
3217 cb (EV_A_ EV_FORK, forks [i]);
3218#endif
1055 3219
1056static void 3220#if EV_ASYNC_ENABLE
1057sin_cb (struct ev_io *w, int revents) 3221 if (types & EV_ASYNC)
1058{ 3222 for (i = asynccnt; i--; )
1059 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 3223 cb (EV_A_ EV_ASYNC, asyncs [i]);
1060} 3224#endif
1061 3225
1062static void 3226 if (types & EV_PREPARE)
1063ocb (struct ev_timer *w, int revents) 3227 for (i = preparecnt; i--; )
1064{ 3228#if EV_EMBED_ENABLE
1065 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 3229 if (ev_cb (prepares [i]) != embed_prepare_cb)
1066 ev_timer_stop (w); 3230#endif
1067 ev_timer_start (w); 3231 cb (EV_A_ EV_PREPARE, prepares [i]);
1068}
1069 3232
1070static void 3233 if (types & EV_CHECK)
1071scb (struct ev_signal *w, int revents) 3234 for (i = checkcnt; i--; )
1072{ 3235 cb (EV_A_ EV_CHECK, checks [i]);
1073 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1074 ev_io_stop (&wio);
1075 ev_io_start (&wio);
1076}
1077 3236
1078static void 3237 if (types & EV_SIGNAL)
1079gcb (struct ev_signal *w, int revents)
1080{
1081 fprintf (stderr, "generic %x\n", revents);
1082
1083}
1084
1085int main (void)
1086{
1087 ev_init (0);
1088
1089 ev_io_init (&wio, sin_cb, 0, EV_READ);
1090 ev_io_start (&wio);
1091
1092 struct ev_timer t[10000];
1093
1094#if 0
1095 int i;
1096 for (i = 0; i < 10000; ++i) 3238 for (i = 0; i < signalmax; ++i)
1097 { 3239 for (wl = signals [i].head; wl; )
1098 struct ev_timer *w = t + i; 3240 {
1099 ev_watcher_init (w, ocb, i); 3241 wn = wl->next;
1100 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533); 3242 cb (EV_A_ EV_SIGNAL, wl);
1101 ev_timer_start (w); 3243 wl = wn;
1102 if (drand48 () < 0.5) 3244 }
1103 ev_timer_stop (w);
1104 }
1105#endif
1106 3245
1107 struct ev_timer t1; 3246 if (types & EV_CHILD)
1108 ev_timer_init (&t1, ocb, 5, 10); 3247 for (i = EV_PID_HASHSIZE; i--; )
1109 ev_timer_start (&t1); 3248 for (wl = childs [i]; wl; )
1110 3249 {
1111 struct ev_signal sig; 3250 wn = wl->next;
1112 ev_signal_init (&sig, scb, SIGQUIT); 3251 cb (EV_A_ EV_CHILD, wl);
1113 ev_signal_start (&sig); 3252 wl = wn;
1114 3253 }
1115 struct ev_check cw; 3254/* EV_STAT 0x00001000 /* stat data changed */
1116 ev_check_init (&cw, gcb); 3255/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
1117 ev_check_start (&cw);
1118
1119 struct ev_idle iw;
1120 ev_idle_init (&iw, gcb);
1121 ev_idle_start (&iw);
1122
1123 ev_loop (0);
1124
1125 return 0;
1126} 3256}
1127
1128#endif 3257#endif
1129 3258
3259#if EV_MULTIPLICITY
3260 #include "ev_wrap.h"
3261#endif
1130 3262
3263#ifdef __cplusplus
3264}
3265#endif
1131 3266
1132

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