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Comparing libev/ev.c (file contents):
Revision 1.27 by root, Wed Oct 31 22:16:36 2007 UTC vs.
Revision 1.297 by root, Fri Jul 10 00:36:21 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
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
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# elif !defined(EV_USE_CLOCK_SYSCALL)
63# define EV_USE_CLOCK_SYSCALL 0
64# endif
65
66# if HAVE_CLOCK_GETTIME
67# ifndef EV_USE_MONOTONIC
68# define EV_USE_MONOTONIC 1
69# endif
70# ifndef EV_USE_REALTIME
71# define EV_USE_REALTIME 0
72# endif
73# else
74# ifndef EV_USE_MONOTONIC
75# define EV_USE_MONOTONIC 0
76# endif
77# ifndef EV_USE_REALTIME
78# define EV_USE_REALTIME 0
79# endif
80# endif
81
82# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
84# define EV_USE_NANOSLEEP 1
85# else
86# define EV_USE_NANOSLEEP 0
87# endif
88# endif
89
90# ifndef EV_USE_SELECT
91# if HAVE_SELECT && HAVE_SYS_SELECT_H
92# define EV_USE_SELECT 1
93# else
94# define EV_USE_SELECT 0
95# endif
96# endif
97
98# ifndef EV_USE_POLL
99# if HAVE_POLL && HAVE_POLL_H
100# define EV_USE_POLL 1
101# else
102# define EV_USE_POLL 0
103# endif
104# endif
105
106# ifndef EV_USE_EPOLL
107# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
108# define EV_USE_EPOLL 1
109# else
110# define EV_USE_EPOLL 0
111# endif
112# endif
113
114# ifndef EV_USE_KQUEUE
115# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
116# define EV_USE_KQUEUE 1
117# else
118# define EV_USE_KQUEUE 0
119# endif
120# endif
121
122# ifndef EV_USE_PORT
123# if HAVE_PORT_H && HAVE_PORT_CREATE
124# define EV_USE_PORT 1
125# else
126# define EV_USE_PORT 0
127# endif
128# endif
129
130# ifndef EV_USE_INOTIFY
131# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
132# define EV_USE_INOTIFY 1
133# else
134# define EV_USE_INOTIFY 0
135# endif
136# endif
137
138# ifndef EV_USE_EVENTFD
139# if HAVE_EVENTFD
140# define EV_USE_EVENTFD 1
141# else
142# define EV_USE_EVENTFD 0
143# endif
144# endif
145
146#endif
29 147
30#include <math.h> 148#include <math.h>
31#include <stdlib.h> 149#include <stdlib.h>
32#include <unistd.h>
33#include <fcntl.h> 150#include <fcntl.h>
34#include <signal.h>
35#include <stddef.h> 151#include <stddef.h>
36 152
37#include <stdio.h> 153#include <stdio.h>
38 154
39#include <assert.h> 155#include <assert.h>
40#include <errno.h> 156#include <errno.h>
41#include <sys/types.h> 157#include <sys/types.h>
42#include <sys/wait.h>
43#include <sys/time.h>
44#include <time.h> 158#include <time.h>
45 159
46#ifndef HAVE_MONOTONIC 160#include <signal.h>
47# ifdef CLOCK_MONOTONIC 161
48# define HAVE_MONOTONIC 1 162#ifdef EV_H
163# include EV_H
164#else
165# include "ev.h"
166#endif
167
168#ifndef _WIN32
169# include <sys/time.h>
170# include <sys/wait.h>
171# include <unistd.h>
172#else
173# include <io.h>
174# define WIN32_LEAN_AND_MEAN
175# include <windows.h>
176# ifndef EV_SELECT_IS_WINSOCKET
177# define EV_SELECT_IS_WINSOCKET 1
49# endif 178# endif
50#endif 179#endif
51 180
52#ifndef HAVE_SELECT 181/* this block tries to deduce configuration from header-defined symbols and defaults */
53# define HAVE_SELECT 1 182
183#ifndef EV_USE_CLOCK_SYSCALL
184# if __linux && __GLIBC__ >= 2
185# define EV_USE_CLOCK_SYSCALL 1
186# else
187# define EV_USE_CLOCK_SYSCALL 0
54#endif 188# endif
189#endif
55 190
56#ifndef HAVE_EPOLL 191#ifndef EV_USE_MONOTONIC
57# define HAVE_EPOLL 0 192# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
193# define EV_USE_MONOTONIC 1
194# else
195# define EV_USE_MONOTONIC 0
58#endif 196# endif
197#endif
59 198
60#ifndef HAVE_REALTIME 199#ifndef EV_USE_REALTIME
61# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ 200# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
201#endif
202
203#ifndef EV_USE_NANOSLEEP
204# if _POSIX_C_SOURCE >= 199309L
205# define EV_USE_NANOSLEEP 1
206# else
207# define EV_USE_NANOSLEEP 0
62#endif 208# endif
209#endif
210
211#ifndef EV_USE_SELECT
212# define EV_USE_SELECT 1
213#endif
214
215#ifndef EV_USE_POLL
216# ifdef _WIN32
217# define EV_USE_POLL 0
218# else
219# define EV_USE_POLL 1
220# endif
221#endif
222
223#ifndef EV_USE_EPOLL
224# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
225# define EV_USE_EPOLL 1
226# else
227# define EV_USE_EPOLL 0
228# endif
229#endif
230
231#ifndef EV_USE_KQUEUE
232# define EV_USE_KQUEUE 0
233#endif
234
235#ifndef EV_USE_PORT
236# define EV_USE_PORT 0
237#endif
238
239#ifndef EV_USE_INOTIFY
240# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
241# define EV_USE_INOTIFY 1
242# else
243# define EV_USE_INOTIFY 0
244# endif
245#endif
246
247#ifndef EV_PID_HASHSIZE
248# if EV_MINIMAL
249# define EV_PID_HASHSIZE 1
250# else
251# define EV_PID_HASHSIZE 16
252# endif
253#endif
254
255#ifndef EV_INOTIFY_HASHSIZE
256# if EV_MINIMAL
257# define EV_INOTIFY_HASHSIZE 1
258# else
259# define EV_INOTIFY_HASHSIZE 16
260# endif
261#endif
262
263#ifndef EV_USE_EVENTFD
264# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
265# define EV_USE_EVENTFD 1
266# else
267# define EV_USE_EVENTFD 0
268# endif
269#endif
270
271#if 0 /* debugging */
272# define EV_VERIFY 3
273# define EV_USE_4HEAP 1
274# define EV_HEAP_CACHE_AT 1
275#endif
276
277#ifndef EV_VERIFY
278# define EV_VERIFY !EV_MINIMAL
279#endif
280
281#ifndef EV_USE_4HEAP
282# define EV_USE_4HEAP !EV_MINIMAL
283#endif
284
285#ifndef EV_HEAP_CACHE_AT
286# define EV_HEAP_CACHE_AT !EV_MINIMAL
287#endif
288
289/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
290/* which makes programs even slower. might work on other unices, too. */
291#if EV_USE_CLOCK_SYSCALL
292# include <syscall.h>
293# ifdef SYS_clock_gettime
294# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
295# undef EV_USE_MONOTONIC
296# define EV_USE_MONOTONIC 1
297# else
298# undef EV_USE_CLOCK_SYSCALL
299# define EV_USE_CLOCK_SYSCALL 0
300# endif
301#endif
302
303/* this block fixes any misconfiguration where we know we run into trouble otherwise */
304
305#ifndef CLOCK_MONOTONIC
306# undef EV_USE_MONOTONIC
307# define EV_USE_MONOTONIC 0
308#endif
309
310#ifndef CLOCK_REALTIME
311# undef EV_USE_REALTIME
312# define EV_USE_REALTIME 0
313#endif
314
315#if !EV_STAT_ENABLE
316# undef EV_USE_INOTIFY
317# define EV_USE_INOTIFY 0
318#endif
319
320#if !EV_USE_NANOSLEEP
321# ifndef _WIN32
322# include <sys/select.h>
323# endif
324#endif
325
326#if EV_USE_INOTIFY
327# include <sys/utsname.h>
328# include <sys/statfs.h>
329# include <sys/inotify.h>
330/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
331# ifndef IN_DONT_FOLLOW
332# undef EV_USE_INOTIFY
333# define EV_USE_INOTIFY 0
334# endif
335#endif
336
337#if EV_SELECT_IS_WINSOCKET
338# include <winsock.h>
339#endif
340
341#if EV_USE_EVENTFD
342/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
343# include <stdint.h>
344# ifdef __cplusplus
345extern "C" {
346# endif
347int eventfd (unsigned int initval, int flags);
348# ifdef __cplusplus
349}
350# endif
351#endif
352
353/**/
354
355#if EV_VERIFY >= 3
356# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
357#else
358# define EV_FREQUENT_CHECK do { } while (0)
359#endif
360
361/*
362 * This is used to avoid floating point rounding problems.
363 * It is added to ev_rt_now when scheduling periodics
364 * to ensure progress, time-wise, even when rounding
365 * errors are against us.
366 * This value is good at least till the year 4000.
367 * Better solutions welcome.
368 */
369#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
63 370
64#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 371#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65#define MAX_BLOCKTIME 60. 372#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
66#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */ 373/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
67 374
68#include "ev.h" 375#if __GNUC__ >= 4
376# define expect(expr,value) __builtin_expect ((expr),(value))
377# define noinline __attribute__ ((noinline))
378#else
379# define expect(expr,value) (expr)
380# define noinline
381# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
382# define inline
383# endif
384#endif
69 385
386#define expect_false(expr) expect ((expr) != 0, 0)
387#define expect_true(expr) expect ((expr) != 0, 1)
388#define inline_size static inline
389
390#if EV_MINIMAL
391# define inline_speed static noinline
392#else
393# define inline_speed static inline
394#endif
395
396#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
397
398#if EV_MINPRI == EV_MAXPRI
399# define ABSPRI(w) (((W)w), 0)
400#else
401# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
402#endif
403
404#define EMPTY /* required for microsofts broken pseudo-c compiler */
405#define EMPTY2(a,b) /* used to suppress some warnings */
406
70typedef struct ev_watcher *W; 407typedef ev_watcher *W;
71typedef struct ev_watcher_list *WL; 408typedef ev_watcher_list *WL;
72typedef struct ev_watcher_time *WT; 409typedef ev_watcher_time *WT;
73 410
74static ev_tstamp now, diff; /* monotonic clock */ 411#define ev_active(w) ((W)(w))->active
75ev_tstamp ev_now; 412#define ev_at(w) ((WT)(w))->at
76int ev_method;
77 413
78static int have_monotonic; /* runtime */ 414#if EV_USE_REALTIME
415/* sig_atomic_t is used to avoid per-thread variables or locking but still */
416/* giving it a reasonably high chance of working on typical architetcures */
417static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
418#endif
79 419
80static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 420#if EV_USE_MONOTONIC
81static void (*method_modify)(int fd, int oev, int nev); 421static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
82static void (*method_poll)(ev_tstamp timeout); 422#endif
423
424#ifdef _WIN32
425# include "ev_win32.c"
426#endif
83 427
84/*****************************************************************************/ 428/*****************************************************************************/
85 429
430static void (*syserr_cb)(const char *msg);
431
432void
433ev_set_syserr_cb (void (*cb)(const char *msg))
434{
435 syserr_cb = cb;
436}
437
438static void noinline
439ev_syserr (const char *msg)
440{
441 if (!msg)
442 msg = "(libev) system error";
443
444 if (syserr_cb)
445 syserr_cb (msg);
446 else
447 {
448 perror (msg);
449 abort ();
450 }
451}
452
453static void *
454ev_realloc_emul (void *ptr, long size)
455{
456 /* some systems, notably openbsd and darwin, fail to properly
457 * implement realloc (x, 0) (as required by both ansi c-98 and
458 * the single unix specification, so work around them here.
459 */
460
461 if (size)
462 return realloc (ptr, size);
463
464 free (ptr);
465 return 0;
466}
467
468static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
469
470void
471ev_set_allocator (void *(*cb)(void *ptr, long size))
472{
473 alloc = cb;
474}
475
476inline_speed void *
477ev_realloc (void *ptr, long size)
478{
479 ptr = alloc (ptr, size);
480
481 if (!ptr && size)
482 {
483 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
484 abort ();
485 }
486
487 return ptr;
488}
489
490#define ev_malloc(size) ev_realloc (0, (size))
491#define ev_free(ptr) ev_realloc ((ptr), 0)
492
493/*****************************************************************************/
494
495/* file descriptor info structure */
496typedef struct
497{
498 WL head;
499 unsigned char events; /* the events watched for */
500 unsigned char reify; /* flag set when this ANFD needs reification */
501 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
502 unsigned char unused;
503#if EV_USE_EPOLL
504 unsigned int egen; /* generation counter to counter epoll bugs */
505#endif
506#if EV_SELECT_IS_WINSOCKET
507 SOCKET handle;
508#endif
509} ANFD;
510
511/* stores the pending event set for a given watcher */
512typedef struct
513{
514 W w;
515 int events; /* the pending event set for the given watcher */
516} ANPENDING;
517
518#if EV_USE_INOTIFY
519/* hash table entry per inotify-id */
520typedef struct
521{
522 WL head;
523} ANFS;
524#endif
525
526/* Heap Entry */
527#if EV_HEAP_CACHE_AT
528 /* a heap element */
529 typedef struct {
530 ev_tstamp at;
531 WT w;
532 } ANHE;
533
534 #define ANHE_w(he) (he).w /* access watcher, read-write */
535 #define ANHE_at(he) (he).at /* access cached at, read-only */
536 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
537#else
538 /* a heap element */
539 typedef WT ANHE;
540
541 #define ANHE_w(he) (he)
542 #define ANHE_at(he) (he)->at
543 #define ANHE_at_cache(he)
544#endif
545
546#if EV_MULTIPLICITY
547
548 struct ev_loop
549 {
550 ev_tstamp ev_rt_now;
551 #define ev_rt_now ((loop)->ev_rt_now)
552 #define VAR(name,decl) decl;
553 #include "ev_vars.h"
554 #undef VAR
555 };
556 #include "ev_wrap.h"
557
558 static struct ev_loop default_loop_struct;
559 struct ev_loop *ev_default_loop_ptr;
560
561#else
562
563 ev_tstamp ev_rt_now;
564 #define VAR(name,decl) static decl;
565 #include "ev_vars.h"
566 #undef VAR
567
568 static int ev_default_loop_ptr;
569
570#endif
571
572#if EV_MINIMAL < 2
573# define EV_SUSPEND_CB if (expect_false (suspend_cb)) suspend_cb (EV_A)
574# define EV_RESUME_CB if (expect_false (resume_cb )) resume_cb (EV_A)
575# define EV_INVOKE_PENDING invoke_cb (EV_A)
576#else
577# define EV_SUSPEND_CB (void)0
578# define EV_RESUME_CB (void)0
579# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
580#endif
581
582/*****************************************************************************/
583
584#ifndef EV_HAVE_EV_TIME
86ev_tstamp 585ev_tstamp
87ev_time (void) 586ev_time (void)
88{ 587{
89#if HAVE_REALTIME 588#if EV_USE_REALTIME
589 if (expect_true (have_realtime))
590 {
90 struct timespec ts; 591 struct timespec ts;
91 clock_gettime (CLOCK_REALTIME, &ts); 592 clock_gettime (CLOCK_REALTIME, &ts);
92 return ts.tv_sec + ts.tv_nsec * 1e-9; 593 return ts.tv_sec + ts.tv_nsec * 1e-9;
93#else 594 }
595#endif
596
94 struct timeval tv; 597 struct timeval tv;
95 gettimeofday (&tv, 0); 598 gettimeofday (&tv, 0);
96 return tv.tv_sec + tv.tv_usec * 1e-6; 599 return tv.tv_sec + tv.tv_usec * 1e-6;
97#endif
98} 600}
601#endif
99 602
100static ev_tstamp 603inline_size ev_tstamp
101get_clock (void) 604get_clock (void)
102{ 605{
103#if HAVE_MONOTONIC 606#if EV_USE_MONOTONIC
104 if (have_monotonic) 607 if (expect_true (have_monotonic))
105 { 608 {
106 struct timespec ts; 609 struct timespec ts;
107 clock_gettime (CLOCK_MONOTONIC, &ts); 610 clock_gettime (CLOCK_MONOTONIC, &ts);
108 return ts.tv_sec + ts.tv_nsec * 1e-9; 611 return ts.tv_sec + ts.tv_nsec * 1e-9;
109 } 612 }
110#endif 613#endif
111 614
112 return ev_time (); 615 return ev_time ();
113} 616}
114 617
115#define array_needsize(base,cur,cnt,init) \ 618#if EV_MULTIPLICITY
116 if ((cnt) > cur) \ 619ev_tstamp
117 { \ 620ev_now (EV_P)
118 int newcnt = cur; \ 621{
119 do \ 622 return ev_rt_now;
120 { \ 623}
121 newcnt = (newcnt << 1) | 4 & ~3; \ 624#endif
122 } \ 625
123 while ((cnt) > newcnt); \ 626void
124 \ 627ev_sleep (ev_tstamp delay)
125 base = realloc (base, sizeof (*base) * (newcnt)); \ 628{
126 init (base + cur, newcnt - cur); \ 629 if (delay > 0.)
127 cur = newcnt; \
128 } 630 {
631#if EV_USE_NANOSLEEP
632 struct timespec ts;
633
634 ts.tv_sec = (time_t)delay;
635 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
636
637 nanosleep (&ts, 0);
638#elif defined(_WIN32)
639 Sleep ((unsigned long)(delay * 1e3));
640#else
641 struct timeval tv;
642
643 tv.tv_sec = (time_t)delay;
644 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
645
646 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
647 /* somehting not guaranteed by newer posix versions, but guaranteed */
648 /* by older ones */
649 select (0, 0, 0, 0, &tv);
650#endif
651 }
652}
129 653
130/*****************************************************************************/ 654/*****************************************************************************/
131 655
132typedef struct 656#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
133{
134 struct ev_io *head;
135 int events;
136} ANFD;
137 657
138static ANFD *anfds; 658/* find a suitable new size for the given array, */
139static int anfdmax; 659/* hopefully by rounding to a ncie-to-malloc size */
140 660inline_size int
141static void 661array_nextsize (int elem, int cur, int cnt)
142anfds_init (ANFD *base, int count)
143{ 662{
144 while (count--) 663 int ncur = cur + 1;
145 { 664
146 base->head = 0; 665 do
147 base->events = EV_NONE; 666 ncur <<= 1;
148 ++base; 667 while (cnt > ncur);
668
669 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
670 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
149 } 671 {
150} 672 ncur *= elem;
151 673 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
152typedef struct 674 ncur = ncur - sizeof (void *) * 4;
153{ 675 ncur /= elem;
154 W w;
155 int events;
156} ANPENDING;
157
158static ANPENDING *pendings;
159static int pendingmax, pendingcnt;
160
161static void
162event (W w, int events)
163{
164 if (w->active)
165 { 676 }
677
678 return ncur;
679}
680
681static noinline void *
682array_realloc (int elem, void *base, int *cur, int cnt)
683{
684 *cur = array_nextsize (elem, *cur, cnt);
685 return ev_realloc (base, elem * *cur);
686}
687
688#define array_init_zero(base,count) \
689 memset ((void *)(base), 0, sizeof (*(base)) * (count))
690
691#define array_needsize(type,base,cur,cnt,init) \
692 if (expect_false ((cnt) > (cur))) \
693 { \
694 int ocur_ = (cur); \
695 (base) = (type *)array_realloc \
696 (sizeof (type), (base), &(cur), (cnt)); \
697 init ((base) + (ocur_), (cur) - ocur_); \
698 }
699
700#if 0
701#define array_slim(type,stem) \
702 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
703 { \
704 stem ## max = array_roundsize (stem ## cnt >> 1); \
705 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
706 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
707 }
708#endif
709
710#define array_free(stem, idx) \
711 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
712
713/*****************************************************************************/
714
715/* dummy callback for pending events */
716static void noinline
717pendingcb (EV_P_ ev_prepare *w, int revents)
718{
719}
720
721void noinline
722ev_feed_event (EV_P_ void *w, int revents)
723{
724 W w_ = (W)w;
725 int pri = ABSPRI (w_);
726
727 if (expect_false (w_->pending))
728 pendings [pri][w_->pending - 1].events |= revents;
729 else
730 {
166 w->pending = ++pendingcnt; 731 w_->pending = ++pendingcnt [pri];
167 array_needsize (pendings, pendingmax, pendingcnt, ); 732 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
168 pendings [pendingcnt - 1].w = w; 733 pendings [pri][w_->pending - 1].w = w_;
169 pendings [pendingcnt - 1].events = events; 734 pendings [pri][w_->pending - 1].events = revents;
170 } 735 }
171} 736}
172 737
173static void 738inline_speed void
739feed_reverse (EV_P_ W w)
740{
741 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
742 rfeeds [rfeedcnt++] = w;
743}
744
745inline_size void
746feed_reverse_done (EV_P_ int revents)
747{
748 do
749 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
750 while (rfeedcnt);
751}
752
753inline_speed void
174queue_events (W *events, int eventcnt, int type) 754queue_events (EV_P_ W *events, int eventcnt, int type)
175{ 755{
176 int i; 756 int i;
177 757
178 for (i = 0; i < eventcnt; ++i) 758 for (i = 0; i < eventcnt; ++i)
179 event (events [i], type); 759 ev_feed_event (EV_A_ events [i], type);
180} 760}
181 761
182static void 762/*****************************************************************************/
763
764inline_speed void
183fd_event (int fd, int events) 765fd_event (EV_P_ int fd, int revents)
184{ 766{
185 ANFD *anfd = anfds + fd; 767 ANFD *anfd = anfds + fd;
186 struct ev_io *w; 768 ev_io *w;
187 769
188 for (w = anfd->head; w; w = w->next) 770 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
189 { 771 {
190 int ev = w->events & events; 772 int ev = w->events & revents;
191 773
192 if (ev) 774 if (ev)
193 event ((W)w, ev); 775 ev_feed_event (EV_A_ (W)w, ev);
194 } 776 }
195} 777}
196 778
197/*****************************************************************************/ 779void
780ev_feed_fd_event (EV_P_ int fd, int revents)
781{
782 if (fd >= 0 && fd < anfdmax)
783 fd_event (EV_A_ fd, revents);
784}
198 785
199static int *fdchanges; 786/* make sure the external fd watch events are in-sync */
200static int fdchangemax, fdchangecnt; 787/* with the kernel/libev internal state */
201 788inline_size void
202static void 789fd_reify (EV_P)
203fd_reify (void)
204{ 790{
205 int i; 791 int i;
206 792
207 for (i = 0; i < fdchangecnt; ++i) 793 for (i = 0; i < fdchangecnt; ++i)
208 { 794 {
209 int fd = fdchanges [i]; 795 int fd = fdchanges [i];
210 ANFD *anfd = anfds + fd; 796 ANFD *anfd = anfds + fd;
211 struct ev_io *w; 797 ev_io *w;
212 798
213 int events = 0; 799 unsigned char events = 0;
214 800
215 for (w = anfd->head; w; w = w->next) 801 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
216 events |= w->events; 802 events |= (unsigned char)w->events;
217 803
218 anfd->events &= ~EV_REIFY; 804#if EV_SELECT_IS_WINSOCKET
219 805 if (events)
220 if (anfd->events != events)
221 { 806 {
222 method_modify (fd, anfd->events, events); 807 unsigned long arg;
223 anfd->events = events; 808 #ifdef EV_FD_TO_WIN32_HANDLE
809 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
810 #else
811 anfd->handle = _get_osfhandle (fd);
812 #endif
813 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
224 } 814 }
815#endif
816
817 {
818 unsigned char o_events = anfd->events;
819 unsigned char o_reify = anfd->reify;
820
821 anfd->reify = 0;
822 anfd->events = events;
823
824 if (o_events != events || o_reify & EV__IOFDSET)
825 backend_modify (EV_A_ fd, o_events, events);
826 }
225 } 827 }
226 828
227 fdchangecnt = 0; 829 fdchangecnt = 0;
228} 830}
229 831
230static void 832/* something about the given fd changed */
231fd_change (int fd) 833inline_size void
834fd_change (EV_P_ int fd, int flags)
232{ 835{
233 if (anfds [fd].events & EV_REIFY) 836 unsigned char reify = anfds [fd].reify;
234 return; 837 anfds [fd].reify |= flags;
235 838
236 anfds [fd].events |= EV_REIFY; 839 if (expect_true (!reify))
237 840 {
238 ++fdchangecnt; 841 ++fdchangecnt;
239 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 842 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
240 fdchanges [fdchangecnt - 1] = fd; 843 fdchanges [fdchangecnt - 1] = fd;
844 }
845}
846
847/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
848inline_speed void
849fd_kill (EV_P_ int fd)
850{
851 ev_io *w;
852
853 while ((w = (ev_io *)anfds [fd].head))
854 {
855 ev_io_stop (EV_A_ w);
856 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
857 }
858}
859
860/* check whether the given fd is atcually valid, for error recovery */
861inline_size int
862fd_valid (int fd)
863{
864#ifdef _WIN32
865 return _get_osfhandle (fd) != -1;
866#else
867 return fcntl (fd, F_GETFD) != -1;
868#endif
241} 869}
242 870
243/* called on EBADF to verify fds */ 871/* called on EBADF to verify fds */
244static void 872static void noinline
245fd_recheck (void) 873fd_ebadf (EV_P)
246{ 874{
247 int fd; 875 int fd;
248 876
249 for (fd = 0; fd < anfdmax; ++fd) 877 for (fd = 0; fd < anfdmax; ++fd)
250 if (anfds [fd].events) 878 if (anfds [fd].events)
251 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 879 if (!fd_valid (fd) && errno == EBADF)
252 while (anfds [fd].head) 880 fd_kill (EV_A_ fd);
881}
882
883/* called on ENOMEM in select/poll to kill some fds and retry */
884static void noinline
885fd_enomem (EV_P)
886{
887 int fd;
888
889 for (fd = anfdmax; fd--; )
890 if (anfds [fd].events)
253 { 891 {
254 event ((W)anfds [fd].head, EV_ERROR); 892 fd_kill (EV_A_ fd);
255 evio_stop (anfds [fd].head); 893 return;
256 } 894 }
895}
896
897/* usually called after fork if backend needs to re-arm all fds from scratch */
898static void noinline
899fd_rearm_all (EV_P)
900{
901 int fd;
902
903 for (fd = 0; fd < anfdmax; ++fd)
904 if (anfds [fd].events)
905 {
906 anfds [fd].events = 0;
907 anfds [fd].emask = 0;
908 fd_change (EV_A_ fd, EV__IOFDSET | 1);
909 }
257} 910}
258 911
259/*****************************************************************************/ 912/*****************************************************************************/
260 913
261static struct ev_timer **timers; 914/*
262static int timermax, timercnt; 915 * the heap functions want a real array index. array index 0 uis guaranteed to not
916 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
917 * the branching factor of the d-tree.
918 */
263 919
264static struct ev_periodic **periodics; 920/*
265static int periodicmax, periodiccnt; 921 * at the moment we allow libev the luxury of two heaps,
922 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
923 * which is more cache-efficient.
924 * the difference is about 5% with 50000+ watchers.
925 */
926#if EV_USE_4HEAP
266 927
267static void 928#define DHEAP 4
268upheap (WT *timers, int k) 929#define HEAP0 (DHEAP - 1) /* index of first element in heap */
269{ 930#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
270 WT w = timers [k]; 931#define UPHEAP_DONE(p,k) ((p) == (k))
271 932
272 while (k && timers [k >> 1]->at > w->at) 933/* away from the root */
273 { 934inline_speed void
274 timers [k] = timers [k >> 1];
275 timers [k]->active = k + 1;
276 k >>= 1;
277 }
278
279 timers [k] = w;
280 timers [k]->active = k + 1;
281
282}
283
284static void
285downheap (WT *timers, int N, int k) 935downheap (ANHE *heap, int N, int k)
286{ 936{
287 WT w = timers [k]; 937 ANHE he = heap [k];
938 ANHE *E = heap + N + HEAP0;
288 939
289 while (k < (N >> 1)) 940 for (;;)
290 { 941 {
291 int j = k << 1; 942 ev_tstamp minat;
943 ANHE *minpos;
944 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
292 945
293 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 946 /* find minimum child */
947 if (expect_true (pos + DHEAP - 1 < E))
294 ++j; 948 {
295 949 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
296 if (w->at <= timers [j]->at) 950 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
951 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
952 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
953 }
954 else if (pos < E)
955 {
956 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
957 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
958 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
959 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
960 }
961 else
297 break; 962 break;
298 963
299 timers [k] = timers [j]; 964 if (ANHE_at (he) <= minat)
300 timers [k]->active = k + 1; 965 break;
966
967 heap [k] = *minpos;
968 ev_active (ANHE_w (*minpos)) = k;
969
970 k = minpos - heap;
971 }
972
973 heap [k] = he;
974 ev_active (ANHE_w (he)) = k;
975}
976
977#else /* 4HEAP */
978
979#define HEAP0 1
980#define HPARENT(k) ((k) >> 1)
981#define UPHEAP_DONE(p,k) (!(p))
982
983/* away from the root */
984inline_speed void
985downheap (ANHE *heap, int N, int k)
986{
987 ANHE he = heap [k];
988
989 for (;;)
990 {
991 int c = k << 1;
992
993 if (c > N + HEAP0 - 1)
994 break;
995
996 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
997 ? 1 : 0;
998
999 if (ANHE_at (he) <= ANHE_at (heap [c]))
1000 break;
1001
1002 heap [k] = heap [c];
1003 ev_active (ANHE_w (heap [k])) = k;
1004
301 k = j; 1005 k = c;
1006 }
1007
1008 heap [k] = he;
1009 ev_active (ANHE_w (he)) = k;
1010}
1011#endif
1012
1013/* towards the root */
1014inline_speed void
1015upheap (ANHE *heap, int k)
1016{
1017 ANHE he = heap [k];
1018
1019 for (;;)
302 } 1020 {
1021 int p = HPARENT (k);
303 1022
304 timers [k] = w; 1023 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
305 timers [k]->active = k + 1; 1024 break;
1025
1026 heap [k] = heap [p];
1027 ev_active (ANHE_w (heap [k])) = k;
1028 k = p;
1029 }
1030
1031 heap [k] = he;
1032 ev_active (ANHE_w (he)) = k;
1033}
1034
1035/* move an element suitably so it is in a correct place */
1036inline_size void
1037adjustheap (ANHE *heap, int N, int k)
1038{
1039 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
1040 upheap (heap, k);
1041 else
1042 downheap (heap, N, k);
1043}
1044
1045/* rebuild the heap: this function is used only once and executed rarely */
1046inline_size void
1047reheap (ANHE *heap, int N)
1048{
1049 int i;
1050
1051 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1052 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1053 for (i = 0; i < N; ++i)
1054 upheap (heap, i + HEAP0);
306} 1055}
307 1056
308/*****************************************************************************/ 1057/*****************************************************************************/
309 1058
1059/* associate signal watchers to a signal signal */
310typedef struct 1060typedef struct
311{ 1061{
312 struct ev_signal *head; 1062 WL head;
313 sig_atomic_t gotsig; 1063 EV_ATOMIC_T gotsig;
314} ANSIG; 1064} ANSIG;
315 1065
316static ANSIG *signals; 1066static ANSIG *signals;
317static int signalmax; 1067static int signalmax;
318 1068
319static int sigpipe [2]; 1069static EV_ATOMIC_T gotsig;
320static sig_atomic_t gotsig;
321static struct ev_io sigev;
322 1070
1071/*****************************************************************************/
1072
1073/* used to prepare libev internal fd's */
1074/* this is not fork-safe */
1075inline_speed void
1076fd_intern (int fd)
1077{
1078#ifdef _WIN32
1079 unsigned long arg = 1;
1080 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1081#else
1082 fcntl (fd, F_SETFD, FD_CLOEXEC);
1083 fcntl (fd, F_SETFL, O_NONBLOCK);
1084#endif
1085}
1086
1087static void noinline
1088evpipe_init (EV_P)
1089{
1090 if (!ev_is_active (&pipe_w))
1091 {
1092#if EV_USE_EVENTFD
1093 if ((evfd = eventfd (0, 0)) >= 0)
1094 {
1095 evpipe [0] = -1;
1096 fd_intern (evfd);
1097 ev_io_set (&pipe_w, evfd, EV_READ);
1098 }
1099 else
1100#endif
1101 {
1102 while (pipe (evpipe))
1103 ev_syserr ("(libev) error creating signal/async pipe");
1104
1105 fd_intern (evpipe [0]);
1106 fd_intern (evpipe [1]);
1107 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1108 }
1109
1110 ev_io_start (EV_A_ &pipe_w);
1111 ev_unref (EV_A); /* watcher should not keep loop alive */
1112 }
1113}
1114
1115inline_size void
1116evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1117{
1118 if (!*flag)
1119 {
1120 int old_errno = errno; /* save errno because write might clobber it */
1121
1122 *flag = 1;
1123
1124#if EV_USE_EVENTFD
1125 if (evfd >= 0)
1126 {
1127 uint64_t counter = 1;
1128 write (evfd, &counter, sizeof (uint64_t));
1129 }
1130 else
1131#endif
1132 write (evpipe [1], &old_errno, 1);
1133
1134 errno = old_errno;
1135 }
1136}
1137
1138/* called whenever the libev signal pipe */
1139/* got some events (signal, async) */
323static void 1140static void
324signals_init (ANSIG *base, int count) 1141pipecb (EV_P_ ev_io *iow, int revents)
325{ 1142{
326 while (count--) 1143#if EV_USE_EVENTFD
1144 if (evfd >= 0)
1145 {
1146 uint64_t counter;
1147 read (evfd, &counter, sizeof (uint64_t));
327 { 1148 }
328 base->head = 0; 1149 else
1150#endif
1151 {
1152 char dummy;
1153 read (evpipe [0], &dummy, 1);
1154 }
1155
1156 if (gotsig && ev_is_default_loop (EV_A))
1157 {
1158 int signum;
329 base->gotsig = 0; 1159 gotsig = 0;
330 ++base; 1160
1161 for (signum = signalmax; signum--; )
1162 if (signals [signum].gotsig)
1163 ev_feed_signal_event (EV_A_ signum + 1);
1164 }
1165
1166#if EV_ASYNC_ENABLE
1167 if (gotasync)
331 } 1168 {
1169 int i;
1170 gotasync = 0;
1171
1172 for (i = asynccnt; i--; )
1173 if (asyncs [i]->sent)
1174 {
1175 asyncs [i]->sent = 0;
1176 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1177 }
1178 }
1179#endif
332} 1180}
1181
1182/*****************************************************************************/
333 1183
334static void 1184static void
335sighandler (int signum) 1185ev_sighandler (int signum)
336{ 1186{
1187#if EV_MULTIPLICITY
1188 struct ev_loop *loop = &default_loop_struct;
1189#endif
1190
1191#if _WIN32
1192 signal (signum, ev_sighandler);
1193#endif
1194
337 signals [signum - 1].gotsig = 1; 1195 signals [signum - 1].gotsig = 1;
338 1196 evpipe_write (EV_A_ &gotsig);
339 if (!gotsig)
340 {
341 gotsig = 1;
342 write (sigpipe [1], &gotsig, 1);
343 }
344} 1197}
345 1198
346static void 1199void noinline
347sigcb (struct ev_io *iow, int revents) 1200ev_feed_signal_event (EV_P_ int signum)
348{ 1201{
349 struct ev_signal *w; 1202 WL w;
350 int sig;
351 1203
352 gotsig = 0; 1204#if EV_MULTIPLICITY
353 read (sigpipe [0], &revents, 1); 1205 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1206#endif
354 1207
355 for (sig = signalmax; sig--; ) 1208 --signum;
356 if (signals [sig].gotsig) 1209
357 { 1210 if (signum < 0 || signum >= signalmax)
1211 return;
1212
358 signals [sig].gotsig = 0; 1213 signals [signum].gotsig = 0;
359 1214
360 for (w = signals [sig].head; w; w = w->next) 1215 for (w = signals [signum].head; w; w = w->next)
361 event ((W)w, EV_SIGNAL); 1216 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
362 }
363}
364
365static void
366siginit (void)
367{
368 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
369 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
370
371 /* rather than sort out wether we really need nb, set it */
372 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
373 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
374
375 evio_set (&sigev, sigpipe [0], EV_READ);
376 evio_start (&sigev);
377} 1217}
378 1218
379/*****************************************************************************/ 1219/*****************************************************************************/
380 1220
381static struct ev_idle **idles; 1221static WL childs [EV_PID_HASHSIZE];
382static int idlemax, idlecnt;
383 1222
384static struct ev_prepare **prepares; 1223#ifndef _WIN32
385static int preparemax, preparecnt;
386 1224
387static struct ev_check **checks;
388static int checkmax, checkcnt;
389
390/*****************************************************************************/
391
392static struct ev_child *childs [PID_HASHSIZE];
393static struct ev_signal childev; 1225static ev_signal childev;
1226
1227#ifndef WIFCONTINUED
1228# define WIFCONTINUED(status) 0
1229#endif
1230
1231/* handle a single child status event */
1232inline_speed void
1233child_reap (EV_P_ int chain, int pid, int status)
1234{
1235 ev_child *w;
1236 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1237
1238 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1239 {
1240 if ((w->pid == pid || !w->pid)
1241 && (!traced || (w->flags & 1)))
1242 {
1243 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1244 w->rpid = pid;
1245 w->rstatus = status;
1246 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1247 }
1248 }
1249}
394 1250
395#ifndef WCONTINUED 1251#ifndef WCONTINUED
396# define WCONTINUED 0 1252# define WCONTINUED 0
397#endif 1253#endif
398 1254
1255/* called on sigchld etc., calls waitpid */
399static void 1256static void
400childcb (struct ev_signal *sw, int revents) 1257childcb (EV_P_ ev_signal *sw, int revents)
401{ 1258{
402 struct ev_child *w;
403 int pid, status; 1259 int pid, status;
404 1260
1261 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
405 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1262 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
406 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1263 if (!WCONTINUED
407 if (w->pid == pid || w->pid == -1) 1264 || errno != EINVAL
408 { 1265 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
409 w->status = status; 1266 return;
410 event ((W)w, EV_CHILD); 1267
411 } 1268 /* make sure we are called again until all children have been reaped */
1269 /* we need to do it this way so that the callback gets called before we continue */
1270 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1271
1272 child_reap (EV_A_ pid, pid, status);
1273 if (EV_PID_HASHSIZE > 1)
1274 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
412} 1275}
1276
1277#endif
413 1278
414/*****************************************************************************/ 1279/*****************************************************************************/
415 1280
1281#if EV_USE_PORT
1282# include "ev_port.c"
1283#endif
1284#if EV_USE_KQUEUE
1285# include "ev_kqueue.c"
1286#endif
416#if HAVE_EPOLL 1287#if EV_USE_EPOLL
417# include "ev_epoll.c" 1288# include "ev_epoll.c"
418#endif 1289#endif
1290#if EV_USE_POLL
1291# include "ev_poll.c"
1292#endif
419#if HAVE_SELECT 1293#if EV_USE_SELECT
420# include "ev_select.c" 1294# include "ev_select.c"
421#endif 1295#endif
422 1296
423int 1297int
424ev_version_major (void) 1298ev_version_major (void)
… …
430ev_version_minor (void) 1304ev_version_minor (void)
431{ 1305{
432 return EV_VERSION_MINOR; 1306 return EV_VERSION_MINOR;
433} 1307}
434 1308
435int ev_init (int flags) 1309/* return true if we are running with elevated privileges and should ignore env variables */
1310int inline_size
1311enable_secure (void)
436{ 1312{
437 if (!ev_method) 1313#ifdef _WIN32
1314 return 0;
1315#else
1316 return getuid () != geteuid ()
1317 || getgid () != getegid ();
1318#endif
1319}
1320
1321unsigned int
1322ev_supported_backends (void)
1323{
1324 unsigned int flags = 0;
1325
1326 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1327 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1328 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1329 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1330 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1331
1332 return flags;
1333}
1334
1335unsigned int
1336ev_recommended_backends (void)
1337{
1338 unsigned int flags = ev_supported_backends ();
1339
1340#ifndef __NetBSD__
1341 /* kqueue is borked on everything but netbsd apparently */
1342 /* it usually doesn't work correctly on anything but sockets and pipes */
1343 flags &= ~EVBACKEND_KQUEUE;
1344#endif
1345#ifdef __APPLE__
1346 /* only select works correctly on that "unix-certified" platform */
1347 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1348 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1349#endif
1350
1351 return flags;
1352}
1353
1354unsigned int
1355ev_embeddable_backends (void)
1356{
1357 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1358
1359 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1360 /* please fix it and tell me how to detect the fix */
1361 flags &= ~EVBACKEND_EPOLL;
1362
1363 return flags;
1364}
1365
1366unsigned int
1367ev_backend (EV_P)
1368{
1369 return backend;
1370}
1371
1372#if EV_MINIMAL < 2
1373unsigned int
1374ev_loop_count (EV_P)
1375{
1376 return loop_count;
1377}
1378
1379unsigned int
1380ev_loop_depth (EV_P)
1381{
1382 return loop_depth;
1383}
1384
1385void
1386ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1387{
1388 io_blocktime = interval;
1389}
1390
1391void
1392ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1393{
1394 timeout_blocktime = interval;
1395}
1396
1397void
1398ev_set_userdata (EV_P_ void *data)
1399{
1400 userdata = data;
1401}
1402
1403void *
1404ev_userdata (EV_P)
1405{
1406 return userdata;
1407}
1408
1409void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1410{
1411 invoke_cb = invoke_pending_cb;
1412}
1413
1414void ev_set_blocking_cb (EV_P_ void (*suspend_cb_)(EV_P), void (*resume_cb_)(EV_P))
1415{
1416 suspend_cb = suspend_cb_;
1417 resume_cb = resume_cb_;
1418}
1419#endif
1420
1421/* initialise a loop structure, must be zero-initialised */
1422static void noinline
1423loop_init (EV_P_ unsigned int flags)
1424{
1425 if (!backend)
438 { 1426 {
1427#if EV_USE_REALTIME
1428 if (!have_realtime)
1429 {
1430 struct timespec ts;
1431
1432 if (!clock_gettime (CLOCK_REALTIME, &ts))
1433 have_realtime = 1;
1434 }
1435#endif
1436
439#if HAVE_MONOTONIC 1437#if EV_USE_MONOTONIC
1438 if (!have_monotonic)
1439 {
1440 struct timespec ts;
1441
1442 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1443 have_monotonic = 1;
1444 }
1445#endif
1446
1447 ev_rt_now = ev_time ();
1448 mn_now = get_clock ();
1449 now_floor = mn_now;
1450 rtmn_diff = ev_rt_now - mn_now;
1451#if EV_MINIMAL < 2
1452 invoke_cb = ev_invoke_pending;
1453#endif
1454
1455 io_blocktime = 0.;
1456 timeout_blocktime = 0.;
1457 backend = 0;
1458 backend_fd = -1;
1459 gotasync = 0;
1460#if EV_USE_INOTIFY
1461 fs_fd = -2;
1462#endif
1463
1464 /* pid check not overridable via env */
1465#ifndef _WIN32
1466 if (flags & EVFLAG_FORKCHECK)
1467 curpid = getpid ();
1468#endif
1469
1470 if (!(flags & EVFLAG_NOENV)
1471 && !enable_secure ()
1472 && getenv ("LIBEV_FLAGS"))
1473 flags = atoi (getenv ("LIBEV_FLAGS"));
1474
1475 if (!(flags & 0x0000ffffU))
1476 flags |= ev_recommended_backends ();
1477
1478#if EV_USE_PORT
1479 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1480#endif
1481#if EV_USE_KQUEUE
1482 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1483#endif
1484#if EV_USE_EPOLL
1485 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1486#endif
1487#if EV_USE_POLL
1488 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1489#endif
1490#if EV_USE_SELECT
1491 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1492#endif
1493
1494 ev_prepare_init (&pending_w, pendingcb);
1495
1496 ev_init (&pipe_w, pipecb);
1497 ev_set_priority (&pipe_w, EV_MAXPRI);
1498 }
1499}
1500
1501/* free up a loop structure */
1502static void noinline
1503loop_destroy (EV_P)
1504{
1505 int i;
1506
1507 if (ev_is_active (&pipe_w))
1508 {
1509 ev_ref (EV_A); /* signal watcher */
1510 ev_io_stop (EV_A_ &pipe_w);
1511
1512#if EV_USE_EVENTFD
1513 if (evfd >= 0)
1514 close (evfd);
1515#endif
1516
1517 if (evpipe [0] >= 0)
1518 {
1519 close (evpipe [0]);
1520 close (evpipe [1]);
1521 }
1522 }
1523
1524#if EV_USE_INOTIFY
1525 if (fs_fd >= 0)
1526 close (fs_fd);
1527#endif
1528
1529 if (backend_fd >= 0)
1530 close (backend_fd);
1531
1532#if EV_USE_PORT
1533 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1534#endif
1535#if EV_USE_KQUEUE
1536 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1537#endif
1538#if EV_USE_EPOLL
1539 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1540#endif
1541#if EV_USE_POLL
1542 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1543#endif
1544#if EV_USE_SELECT
1545 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1546#endif
1547
1548 for (i = NUMPRI; i--; )
1549 {
1550 array_free (pending, [i]);
1551#if EV_IDLE_ENABLE
1552 array_free (idle, [i]);
1553#endif
1554 }
1555
1556 ev_free (anfds); anfdmax = 0;
1557
1558 /* have to use the microsoft-never-gets-it-right macro */
1559 array_free (rfeed, EMPTY);
1560 array_free (fdchange, EMPTY);
1561 array_free (timer, EMPTY);
1562#if EV_PERIODIC_ENABLE
1563 array_free (periodic, EMPTY);
1564#endif
1565#if EV_FORK_ENABLE
1566 array_free (fork, EMPTY);
1567#endif
1568 array_free (prepare, EMPTY);
1569 array_free (check, EMPTY);
1570#if EV_ASYNC_ENABLE
1571 array_free (async, EMPTY);
1572#endif
1573
1574 backend = 0;
1575}
1576
1577#if EV_USE_INOTIFY
1578inline_size void infy_fork (EV_P);
1579#endif
1580
1581inline_size void
1582loop_fork (EV_P)
1583{
1584#if EV_USE_PORT
1585 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1586#endif
1587#if EV_USE_KQUEUE
1588 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1589#endif
1590#if EV_USE_EPOLL
1591 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1592#endif
1593#if EV_USE_INOTIFY
1594 infy_fork (EV_A);
1595#endif
1596
1597 if (ev_is_active (&pipe_w))
1598 {
1599 /* this "locks" the handlers against writing to the pipe */
1600 /* while we modify the fd vars */
1601 gotsig = 1;
1602#if EV_ASYNC_ENABLE
1603 gotasync = 1;
1604#endif
1605
1606 ev_ref (EV_A);
1607 ev_io_stop (EV_A_ &pipe_w);
1608
1609#if EV_USE_EVENTFD
1610 if (evfd >= 0)
1611 close (evfd);
1612#endif
1613
1614 if (evpipe [0] >= 0)
1615 {
1616 close (evpipe [0]);
1617 close (evpipe [1]);
1618 }
1619
1620 evpipe_init (EV_A);
1621 /* now iterate over everything, in case we missed something */
1622 pipecb (EV_A_ &pipe_w, EV_READ);
1623 }
1624
1625 postfork = 0;
1626}
1627
1628#if EV_MULTIPLICITY
1629
1630struct ev_loop *
1631ev_loop_new (unsigned int flags)
1632{
1633 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1634
1635 memset (loop, 0, sizeof (struct ev_loop));
1636
1637 loop_init (EV_A_ flags);
1638
1639 if (ev_backend (EV_A))
1640 return loop;
1641
1642 return 0;
1643}
1644
1645void
1646ev_loop_destroy (EV_P)
1647{
1648 loop_destroy (EV_A);
1649 ev_free (loop);
1650}
1651
1652void
1653ev_loop_fork (EV_P)
1654{
1655 postfork = 1; /* must be in line with ev_default_fork */
1656}
1657#endif /* multiplicity */
1658
1659#if EV_VERIFY
1660static void noinline
1661verify_watcher (EV_P_ W w)
1662{
1663 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1664
1665 if (w->pending)
1666 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1667}
1668
1669static void noinline
1670verify_heap (EV_P_ ANHE *heap, int N)
1671{
1672 int i;
1673
1674 for (i = HEAP0; i < N + HEAP0; ++i)
1675 {
1676 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1677 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1678 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1679
1680 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1681 }
1682}
1683
1684static void noinline
1685array_verify (EV_P_ W *ws, int cnt)
1686{
1687 while (cnt--)
1688 {
1689 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1690 verify_watcher (EV_A_ ws [cnt]);
1691 }
1692}
1693#endif
1694
1695#if EV_MINIMAL < 2
1696void
1697ev_loop_verify (EV_P)
1698{
1699#if EV_VERIFY
1700 int i;
1701 WL w;
1702
1703 assert (activecnt >= -1);
1704
1705 assert (fdchangemax >= fdchangecnt);
1706 for (i = 0; i < fdchangecnt; ++i)
1707 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1708
1709 assert (anfdmax >= 0);
1710 for (i = 0; i < anfdmax; ++i)
1711 for (w = anfds [i].head; w; w = w->next)
440 { 1712 {
441 struct timespec ts; 1713 verify_watcher (EV_A_ (W)w);
442 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1714 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
443 have_monotonic = 1; 1715 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
444 } 1716 }
1717
1718 assert (timermax >= timercnt);
1719 verify_heap (EV_A_ timers, timercnt);
1720
1721#if EV_PERIODIC_ENABLE
1722 assert (periodicmax >= periodiccnt);
1723 verify_heap (EV_A_ periodics, periodiccnt);
1724#endif
1725
1726 for (i = NUMPRI; i--; )
1727 {
1728 assert (pendingmax [i] >= pendingcnt [i]);
1729#if EV_IDLE_ENABLE
1730 assert (idleall >= 0);
1731 assert (idlemax [i] >= idlecnt [i]);
1732 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1733#endif
1734 }
1735
1736#if EV_FORK_ENABLE
1737 assert (forkmax >= forkcnt);
1738 array_verify (EV_A_ (W *)forks, forkcnt);
1739#endif
1740
1741#if EV_ASYNC_ENABLE
1742 assert (asyncmax >= asynccnt);
1743 array_verify (EV_A_ (W *)asyncs, asynccnt);
1744#endif
1745
1746 assert (preparemax >= preparecnt);
1747 array_verify (EV_A_ (W *)prepares, preparecnt);
1748
1749 assert (checkmax >= checkcnt);
1750 array_verify (EV_A_ (W *)checks, checkcnt);
1751
1752# if 0
1753 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1754 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
445#endif 1755# endif
446
447 ev_now = ev_time ();
448 now = get_clock ();
449 diff = ev_now - now;
450
451 if (pipe (sigpipe))
452 return 0;
453
454 ev_method = EVMETHOD_NONE;
455#if HAVE_EPOLL
456 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
457#endif 1756#endif
458#if HAVE_SELECT 1757}
459 if (ev_method == EVMETHOD_NONE) select_init (flags);
460#endif 1758#endif
461 1759
462 if (ev_method) 1760#if EV_MULTIPLICITY
1761struct ev_loop *
1762ev_default_loop_init (unsigned int flags)
1763#else
1764int
1765ev_default_loop (unsigned int flags)
1766#endif
1767{
1768 if (!ev_default_loop_ptr)
1769 {
1770#if EV_MULTIPLICITY
1771 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1772#else
1773 ev_default_loop_ptr = 1;
1774#endif
1775
1776 loop_init (EV_A_ flags);
1777
1778 if (ev_backend (EV_A))
463 { 1779 {
464 evw_init (&sigev, sigcb); 1780#ifndef _WIN32
465 siginit ();
466
467 evsignal_init (&childev, childcb, SIGCHLD); 1781 ev_signal_init (&childev, childcb, SIGCHLD);
1782 ev_set_priority (&childev, EV_MAXPRI);
468 evsignal_start (&childev); 1783 ev_signal_start (EV_A_ &childev);
469 } 1784 ev_unref (EV_A); /* child watcher should not keep loop alive */
470 }
471
472 return ev_method;
473}
474
475/*****************************************************************************/
476
477void
478ev_prefork (void)
479{
480 /* nop */
481}
482
483void
484ev_postfork_parent (void)
485{
486 /* nop */
487}
488
489void
490ev_postfork_child (void)
491{
492#if HAVE_EPOLL
493 if (ev_method == EVMETHOD_EPOLL)
494 epoll_postfork_child ();
495#endif 1785#endif
496
497 evio_stop (&sigev);
498 close (sigpipe [0]);
499 close (sigpipe [1]);
500 pipe (sigpipe);
501 siginit ();
502}
503
504/*****************************************************************************/
505
506static void
507call_pending (void)
508{
509 while (pendingcnt)
510 {
511 ANPENDING *p = pendings + --pendingcnt;
512
513 if (p->w)
514 {
515 p->w->pending = 0;
516 p->w->cb (p->w, p->events);
517 }
518 }
519}
520
521static void
522timers_reify (void)
523{
524 while (timercnt && timers [0]->at <= now)
525 {
526 struct ev_timer *w = timers [0];
527
528 event ((W)w, EV_TIMEOUT);
529
530 /* first reschedule or stop timer */
531 if (w->repeat)
532 {
533 w->at = now + w->repeat;
534 assert (("timer timeout in the past, negative repeat?", w->at > now));
535 downheap ((WT *)timers, timercnt, 0);
536 } 1786 }
537 else 1787 else
538 evtimer_stop (w); /* nonrepeating: stop timer */ 1788 ev_default_loop_ptr = 0;
539 } 1789 }
540}
541 1790
542static void 1791 return ev_default_loop_ptr;
543periodics_reify (void) 1792}
1793
1794void
1795ev_default_destroy (void)
544{ 1796{
545 while (periodiccnt && periodics [0]->at <= ev_now) 1797#if EV_MULTIPLICITY
1798 struct ev_loop *loop = ev_default_loop_ptr;
1799#endif
1800
1801 ev_default_loop_ptr = 0;
1802
1803#ifndef _WIN32
1804 ev_ref (EV_A); /* child watcher */
1805 ev_signal_stop (EV_A_ &childev);
1806#endif
1807
1808 loop_destroy (EV_A);
1809}
1810
1811void
1812ev_default_fork (void)
1813{
1814#if EV_MULTIPLICITY
1815 struct ev_loop *loop = ev_default_loop_ptr;
1816#endif
1817
1818 postfork = 1; /* must be in line with ev_loop_fork */
1819}
1820
1821/*****************************************************************************/
1822
1823void
1824ev_invoke (EV_P_ void *w, int revents)
1825{
1826 EV_CB_INVOKE ((W)w, revents);
1827}
1828
1829void noinline
1830ev_invoke_pending (EV_P)
1831{
1832 int pri;
1833
1834 for (pri = NUMPRI; pri--; )
1835 while (pendingcnt [pri])
546 { 1836 {
547 struct ev_periodic *w = periodics [0]; 1837 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
548 1838
549 /* first reschedule or stop timer */ 1839 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
550 if (w->interval) 1840 /* ^ this is no longer true, as pending_w could be here */
1841
1842 p->w->pending = 0;
1843 EV_CB_INVOKE (p->w, p->events);
1844 EV_FREQUENT_CHECK;
1845 }
1846}
1847
1848#if EV_IDLE_ENABLE
1849/* make idle watchers pending. this handles the "call-idle */
1850/* only when higher priorities are idle" logic */
1851inline_size void
1852idle_reify (EV_P)
1853{
1854 if (expect_false (idleall))
1855 {
1856 int pri;
1857
1858 for (pri = NUMPRI; pri--; )
551 { 1859 {
552 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1860 if (pendingcnt [pri])
553 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1861 break;
554 downheap ((WT *)periodics, periodiccnt, 0);
555 }
556 else
557 evperiodic_stop (w); /* nonrepeating: stop timer */
558 1862
559 event ((W)w, EV_TIMEOUT); 1863 if (idlecnt [pri])
560 }
561}
562
563static void
564periodics_reschedule (ev_tstamp diff)
565{
566 int i;
567
568 /* adjust periodics after time jump */
569 for (i = 0; i < periodiccnt; ++i)
570 {
571 struct ev_periodic *w = periodics [i];
572
573 if (w->interval)
574 {
575 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
576
577 if (fabs (diff) >= 1e-4)
578 { 1864 {
579 evperiodic_stop (w); 1865 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
580 evperiodic_start (w); 1866 break;
581
582 i = 0; /* restart loop, inefficient, but time jumps should be rare */
583 } 1867 }
584 } 1868 }
585 } 1869 }
586} 1870}
1871#endif
587 1872
588static void 1873/* make timers pending */
589time_update (void) 1874inline_size void
1875timers_reify (EV_P)
1876{
1877 EV_FREQUENT_CHECK;
1878
1879 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1880 {
1881 do
1882 {
1883 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1884
1885 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
1886
1887 /* first reschedule or stop timer */
1888 if (w->repeat)
1889 {
1890 ev_at (w) += w->repeat;
1891 if (ev_at (w) < mn_now)
1892 ev_at (w) = mn_now;
1893
1894 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1895
1896 ANHE_at_cache (timers [HEAP0]);
1897 downheap (timers, timercnt, HEAP0);
1898 }
1899 else
1900 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1901
1902 EV_FREQUENT_CHECK;
1903 feed_reverse (EV_A_ (W)w);
1904 }
1905 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1906
1907 feed_reverse_done (EV_A_ EV_TIMEOUT);
1908 }
1909}
1910
1911#if EV_PERIODIC_ENABLE
1912/* make periodics pending */
1913inline_size void
1914periodics_reify (EV_P)
1915{
1916 EV_FREQUENT_CHECK;
1917
1918 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1919 {
1920 int feed_count = 0;
1921
1922 do
1923 {
1924 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1925
1926 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1927
1928 /* first reschedule or stop timer */
1929 if (w->reschedule_cb)
1930 {
1931 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1932
1933 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1934
1935 ANHE_at_cache (periodics [HEAP0]);
1936 downheap (periodics, periodiccnt, HEAP0);
1937 }
1938 else if (w->interval)
1939 {
1940 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1941 /* if next trigger time is not sufficiently in the future, put it there */
1942 /* this might happen because of floating point inexactness */
1943 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1944 {
1945 ev_at (w) += w->interval;
1946
1947 /* if interval is unreasonably low we might still have a time in the past */
1948 /* so correct this. this will make the periodic very inexact, but the user */
1949 /* has effectively asked to get triggered more often than possible */
1950 if (ev_at (w) < ev_rt_now)
1951 ev_at (w) = ev_rt_now;
1952 }
1953
1954 ANHE_at_cache (periodics [HEAP0]);
1955 downheap (periodics, periodiccnt, HEAP0);
1956 }
1957 else
1958 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1959
1960 EV_FREQUENT_CHECK;
1961 feed_reverse (EV_A_ (W)w);
1962 }
1963 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1964
1965 feed_reverse_done (EV_A_ EV_PERIODIC);
1966 }
1967}
1968
1969/* simply recalculate all periodics */
1970/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1971static void noinline
1972periodics_reschedule (EV_P)
590{ 1973{
591 int i; 1974 int i;
592 1975
593 ev_now = ev_time (); 1976 /* adjust periodics after time jump */
1977 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1978 {
1979 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
594 1980
595 if (have_monotonic) 1981 if (w->reschedule_cb)
1982 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1983 else if (w->interval)
1984 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1985
1986 ANHE_at_cache (periodics [i]);
596 { 1987 }
1988
1989 reheap (periodics, periodiccnt);
1990}
1991#endif
1992
1993/* adjust all timers by a given offset */
1994static void noinline
1995timers_reschedule (EV_P_ ev_tstamp adjust)
1996{
1997 int i;
1998
1999 for (i = 0; i < timercnt; ++i)
2000 {
2001 ANHE *he = timers + i + HEAP0;
2002 ANHE_w (*he)->at += adjust;
2003 ANHE_at_cache (*he);
2004 }
2005}
2006
2007/* fetch new monotonic and realtime times from the kernel */
2008/* also detetc if there was a timejump, and act accordingly */
2009inline_speed void
2010time_update (EV_P_ ev_tstamp max_block)
2011{
2012#if EV_USE_MONOTONIC
2013 if (expect_true (have_monotonic))
2014 {
2015 int i;
597 ev_tstamp odiff = diff; 2016 ev_tstamp odiff = rtmn_diff;
598 2017
599 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 2018 mn_now = get_clock ();
2019
2020 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2021 /* interpolate in the meantime */
2022 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
600 { 2023 {
601 now = get_clock (); 2024 ev_rt_now = rtmn_diff + mn_now;
2025 return;
2026 }
2027
2028 now_floor = mn_now;
2029 ev_rt_now = ev_time ();
2030
2031 /* loop a few times, before making important decisions.
2032 * on the choice of "4": one iteration isn't enough,
2033 * in case we get preempted during the calls to
2034 * ev_time and get_clock. a second call is almost guaranteed
2035 * to succeed in that case, though. and looping a few more times
2036 * doesn't hurt either as we only do this on time-jumps or
2037 * in the unlikely event of having been preempted here.
2038 */
2039 for (i = 4; --i; )
2040 {
602 diff = ev_now - now; 2041 rtmn_diff = ev_rt_now - mn_now;
603 2042
604 if (fabs (odiff - diff) < MIN_TIMEJUMP) 2043 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
605 return; /* all is well */ 2044 return; /* all is well */
606 2045
607 ev_now = ev_time (); 2046 ev_rt_now = ev_time ();
2047 mn_now = get_clock ();
2048 now_floor = mn_now;
608 } 2049 }
609 2050
610 periodics_reschedule (diff - odiff);
611 /* no timer adjustment, as the monotonic clock doesn't jump */ 2051 /* no timer adjustment, as the monotonic clock doesn't jump */
2052 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2053# if EV_PERIODIC_ENABLE
2054 periodics_reschedule (EV_A);
2055# endif
612 } 2056 }
613 else 2057 else
2058#endif
614 { 2059 {
615 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 2060 ev_rt_now = ev_time ();
2061
2062 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
616 { 2063 {
617 periodics_reschedule (ev_now - now);
618
619 /* adjust timers. this is easy, as the offset is the same for all */ 2064 /* adjust timers. this is easy, as the offset is the same for all of them */
620 for (i = 0; i < timercnt; ++i) 2065 timers_reschedule (EV_A_ ev_rt_now - mn_now);
621 timers [i]->at += diff; 2066#if EV_PERIODIC_ENABLE
2067 periodics_reschedule (EV_A);
2068#endif
622 } 2069 }
623 2070
624 now = ev_now; 2071 mn_now = ev_rt_now;
625 } 2072 }
626} 2073}
627 2074
628int ev_loop_done; 2075void
629
630void ev_loop (int flags) 2076ev_loop (EV_P_ int flags)
631{ 2077{
632 double block; 2078#if EV_MINIMAL < 2
633 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 2079 ++loop_depth;
2080#endif
2081
2082 loop_done = EVUNLOOP_CANCEL;
2083
2084 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
634 2085
635 do 2086 do
636 { 2087 {
2088#if EV_VERIFY >= 2
2089 ev_loop_verify (EV_A);
2090#endif
2091
2092#ifndef _WIN32
2093 if (expect_false (curpid)) /* penalise the forking check even more */
2094 if (expect_false (getpid () != curpid))
2095 {
2096 curpid = getpid ();
2097 postfork = 1;
2098 }
2099#endif
2100
2101#if EV_FORK_ENABLE
2102 /* we might have forked, so queue fork handlers */
2103 if (expect_false (postfork))
2104 if (forkcnt)
2105 {
2106 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2107 EV_INVOKE_PENDING;
2108 }
2109#endif
2110
637 /* queue check watchers (and execute them) */ 2111 /* queue prepare watchers (and execute them) */
638 if (preparecnt) 2112 if (expect_false (preparecnt))
639 { 2113 {
640 queue_events ((W *)prepares, preparecnt, EV_PREPARE); 2114 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
641 call_pending (); 2115 EV_INVOKE_PENDING;
642 } 2116 }
643 2117
2118 /* we might have forked, so reify kernel state if necessary */
2119 if (expect_false (postfork))
2120 loop_fork (EV_A);
2121
644 /* update fd-related kernel structures */ 2122 /* update fd-related kernel structures */
645 fd_reify (); 2123 fd_reify (EV_A);
646 2124
647 /* calculate blocking time */ 2125 /* calculate blocking time */
2126 {
2127 ev_tstamp waittime = 0.;
2128 ev_tstamp sleeptime = 0.;
648 2129
649 /* we only need this for !monotonic clockor timers, but as we basically 2130 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
650 always have timers, we just calculate it always */
651 ev_now = ev_time ();
652
653 if (flags & EVLOOP_NONBLOCK || idlecnt)
654 block = 0.;
655 else
656 { 2131 {
2132 /* remember old timestamp for io_blocktime calculation */
2133 ev_tstamp prev_mn_now = mn_now;
2134
2135 /* update time to cancel out callback processing overhead */
2136 time_update (EV_A_ 1e100);
2137
657 block = MAX_BLOCKTIME; 2138 waittime = MAX_BLOCKTIME;
658 2139
659 if (timercnt) 2140 if (timercnt)
660 { 2141 {
661 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 2142 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
662 if (block > to) block = to; 2143 if (waittime > to) waittime = to;
663 } 2144 }
664 2145
2146#if EV_PERIODIC_ENABLE
665 if (periodiccnt) 2147 if (periodiccnt)
666 { 2148 {
667 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 2149 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
668 if (block > to) block = to; 2150 if (waittime > to) waittime = to;
669 } 2151 }
2152#endif
670 2153
671 if (block < 0.) block = 0.; 2154 /* don't let timeouts decrease the waittime below timeout_blocktime */
2155 if (expect_false (waittime < timeout_blocktime))
2156 waittime = timeout_blocktime;
2157
2158 /* extra check because io_blocktime is commonly 0 */
2159 if (expect_false (io_blocktime))
2160 {
2161 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2162
2163 if (sleeptime > waittime - backend_fudge)
2164 sleeptime = waittime - backend_fudge;
2165
2166 if (expect_true (sleeptime > 0.))
2167 {
2168 ev_sleep (sleeptime);
2169 waittime -= sleeptime;
2170 }
2171 }
672 } 2172 }
673 2173
674 method_poll (block); 2174#if EV_MINIMAL < 2
2175 ++loop_count;
2176#endif
2177 backend_poll (EV_A_ waittime);
675 2178
676 /* update ev_now, do magic */ 2179 /* update ev_rt_now, do magic */
677 time_update (); 2180 time_update (EV_A_ waittime + sleeptime);
2181 }
678 2182
679 /* queue pending timers and reschedule them */ 2183 /* queue pending timers and reschedule them */
680 timers_reify (); /* relative timers called last */ 2184 timers_reify (EV_A); /* relative timers called last */
2185#if EV_PERIODIC_ENABLE
681 periodics_reify (); /* absolute timers called first */ 2186 periodics_reify (EV_A); /* absolute timers called first */
2187#endif
682 2188
2189#if EV_IDLE_ENABLE
683 /* queue idle watchers unless io or timers are pending */ 2190 /* queue idle watchers unless other events are pending */
684 if (!pendingcnt) 2191 idle_reify (EV_A);
685 queue_events ((W *)idles, idlecnt, EV_IDLE); 2192#endif
686 2193
687 /* queue check watchers, to be executed first */ 2194 /* queue check watchers, to be executed first */
688 if (checkcnt) 2195 if (expect_false (checkcnt))
689 queue_events ((W *)checks, checkcnt, EV_CHECK); 2196 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
690 2197
691 call_pending (); 2198 EV_INVOKE_PENDING;
692 } 2199 }
693 while (!ev_loop_done); 2200 while (expect_true (
2201 activecnt
2202 && !loop_done
2203 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2204 ));
694 2205
695 if (ev_loop_done != 2) 2206 if (loop_done == EVUNLOOP_ONE)
2207 loop_done = EVUNLOOP_CANCEL;
2208
2209#if EV_MINIMAL < 2
2210 --loop_depth;
2211#endif
2212}
2213
2214void
2215ev_unloop (EV_P_ int how)
2216{
696 ev_loop_done = 0; 2217 loop_done = how;
2218}
2219
2220void
2221ev_ref (EV_P)
2222{
2223 ++activecnt;
2224}
2225
2226void
2227ev_unref (EV_P)
2228{
2229 --activecnt;
2230}
2231
2232void
2233ev_now_update (EV_P)
2234{
2235 time_update (EV_A_ 1e100);
2236}
2237
2238void
2239ev_suspend (EV_P)
2240{
2241 ev_now_update (EV_A);
2242}
2243
2244void
2245ev_resume (EV_P)
2246{
2247 ev_tstamp mn_prev = mn_now;
2248
2249 ev_now_update (EV_A);
2250 timers_reschedule (EV_A_ mn_now - mn_prev);
2251#if EV_PERIODIC_ENABLE
2252 /* TODO: really do this? */
2253 periodics_reschedule (EV_A);
2254#endif
697} 2255}
698 2256
699/*****************************************************************************/ 2257/*****************************************************************************/
2258/* singly-linked list management, used when the expected list length is short */
700 2259
701static void 2260inline_size void
702wlist_add (WL *head, WL elem) 2261wlist_add (WL *head, WL elem)
703{ 2262{
704 elem->next = *head; 2263 elem->next = *head;
705 *head = elem; 2264 *head = elem;
706} 2265}
707 2266
708static void 2267inline_size void
709wlist_del (WL *head, WL elem) 2268wlist_del (WL *head, WL elem)
710{ 2269{
711 while (*head) 2270 while (*head)
712 { 2271 {
713 if (*head == elem) 2272 if (*head == elem)
… …
718 2277
719 head = &(*head)->next; 2278 head = &(*head)->next;
720 } 2279 }
721} 2280}
722 2281
723static void 2282/* internal, faster, version of ev_clear_pending */
724ev_clear (W w) 2283inline_speed void
2284clear_pending (EV_P_ W w)
725{ 2285{
726 if (w->pending) 2286 if (w->pending)
727 { 2287 {
728 pendings [w->pending - 1].w = 0; 2288 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
729 w->pending = 0; 2289 w->pending = 0;
730 } 2290 }
731} 2291}
732 2292
733static void 2293int
2294ev_clear_pending (EV_P_ void *w)
2295{
2296 W w_ = (W)w;
2297 int pending = w_->pending;
2298
2299 if (expect_true (pending))
2300 {
2301 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2302 p->w = (W)&pending_w;
2303 w_->pending = 0;
2304 return p->events;
2305 }
2306 else
2307 return 0;
2308}
2309
2310inline_size void
2311pri_adjust (EV_P_ W w)
2312{
2313 int pri = ev_priority (w);
2314 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2315 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2316 ev_set_priority (w, pri);
2317}
2318
2319inline_speed void
734ev_start (W w, int active) 2320ev_start (EV_P_ W w, int active)
735{ 2321{
2322 pri_adjust (EV_A_ w);
736 w->active = active; 2323 w->active = active;
2324 ev_ref (EV_A);
737} 2325}
738 2326
739static void 2327inline_size void
740ev_stop (W w) 2328ev_stop (EV_P_ W w)
741{ 2329{
2330 ev_unref (EV_A);
742 w->active = 0; 2331 w->active = 0;
743} 2332}
744 2333
745/*****************************************************************************/ 2334/*****************************************************************************/
746 2335
747void 2336void noinline
748evio_start (struct ev_io *w) 2337ev_io_start (EV_P_ ev_io *w)
749{ 2338{
2339 int fd = w->fd;
2340
750 if (ev_is_active (w)) 2341 if (expect_false (ev_is_active (w)))
751 return; 2342 return;
752 2343
753 int fd = w->fd; 2344 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2345 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
754 2346
2347 EV_FREQUENT_CHECK;
2348
755 ev_start ((W)w, 1); 2349 ev_start (EV_A_ (W)w, 1);
756 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2350 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
757 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2351 wlist_add (&anfds[fd].head, (WL)w);
758 2352
759 fd_change (fd); 2353 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
760} 2354 w->events &= ~EV__IOFDSET;
761 2355
762void 2356 EV_FREQUENT_CHECK;
2357}
2358
2359void noinline
763evio_stop (struct ev_io *w) 2360ev_io_stop (EV_P_ ev_io *w)
764{ 2361{
765 ev_clear ((W)w); 2362 clear_pending (EV_A_ (W)w);
766 if (!ev_is_active (w)) 2363 if (expect_false (!ev_is_active (w)))
767 return; 2364 return;
768 2365
2366 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2367
2368 EV_FREQUENT_CHECK;
2369
769 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2370 wlist_del (&anfds[w->fd].head, (WL)w);
770 ev_stop ((W)w); 2371 ev_stop (EV_A_ (W)w);
771 2372
772 fd_change (w->fd); 2373 fd_change (EV_A_ w->fd, 1);
773}
774 2374
775void 2375 EV_FREQUENT_CHECK;
2376}
2377
2378void noinline
776evtimer_start (struct ev_timer *w) 2379ev_timer_start (EV_P_ ev_timer *w)
777{ 2380{
778 if (ev_is_active (w)) 2381 if (expect_false (ev_is_active (w)))
779 return; 2382 return;
780 2383
781 w->at += now; 2384 ev_at (w) += mn_now;
782 2385
783 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 2386 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
784 2387
785 ev_start ((W)w, ++timercnt); 2388 EV_FREQUENT_CHECK;
786 array_needsize (timers, timermax, timercnt, );
787 timers [timercnt - 1] = w;
788 upheap ((WT *)timers, timercnt - 1);
789}
790 2389
791void 2390 ++timercnt;
2391 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2392 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2393 ANHE_w (timers [ev_active (w)]) = (WT)w;
2394 ANHE_at_cache (timers [ev_active (w)]);
2395 upheap (timers, ev_active (w));
2396
2397 EV_FREQUENT_CHECK;
2398
2399 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2400}
2401
2402void noinline
792evtimer_stop (struct ev_timer *w) 2403ev_timer_stop (EV_P_ ev_timer *w)
793{ 2404{
794 ev_clear ((W)w); 2405 clear_pending (EV_A_ (W)w);
795 if (!ev_is_active (w)) 2406 if (expect_false (!ev_is_active (w)))
796 return; 2407 return;
797 2408
798 if (w->active < timercnt--) 2409 EV_FREQUENT_CHECK;
2410
2411 {
2412 int active = ev_active (w);
2413
2414 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2415
2416 --timercnt;
2417
2418 if (expect_true (active < timercnt + HEAP0))
799 { 2419 {
800 timers [w->active - 1] = timers [timercnt]; 2420 timers [active] = timers [timercnt + HEAP0];
801 downheap ((WT *)timers, timercnt, w->active - 1); 2421 adjustheap (timers, timercnt, active);
802 } 2422 }
2423 }
803 2424
804 w->at = w->repeat; 2425 EV_FREQUENT_CHECK;
805 2426
2427 ev_at (w) -= mn_now;
2428
806 ev_stop ((W)w); 2429 ev_stop (EV_A_ (W)w);
807} 2430}
808 2431
809void 2432void noinline
810evtimer_again (struct ev_timer *w) 2433ev_timer_again (EV_P_ ev_timer *w)
811{ 2434{
2435 EV_FREQUENT_CHECK;
2436
812 if (ev_is_active (w)) 2437 if (ev_is_active (w))
813 { 2438 {
814 if (w->repeat) 2439 if (w->repeat)
815 { 2440 {
816 w->at = now + w->repeat; 2441 ev_at (w) = mn_now + w->repeat;
2442 ANHE_at_cache (timers [ev_active (w)]);
817 downheap ((WT *)timers, timercnt, w->active - 1); 2443 adjustheap (timers, timercnt, ev_active (w));
818 } 2444 }
819 else 2445 else
820 evtimer_stop (w); 2446 ev_timer_stop (EV_A_ w);
821 } 2447 }
822 else if (w->repeat) 2448 else if (w->repeat)
2449 {
2450 ev_at (w) = w->repeat;
823 evtimer_start (w); 2451 ev_timer_start (EV_A_ w);
824} 2452 }
825 2453
826void 2454 EV_FREQUENT_CHECK;
2455}
2456
2457#if EV_PERIODIC_ENABLE
2458void noinline
827evperiodic_start (struct ev_periodic *w) 2459ev_periodic_start (EV_P_ ev_periodic *w)
828{ 2460{
829 if (ev_is_active (w)) 2461 if (expect_false (ev_is_active (w)))
830 return; 2462 return;
831 2463
832 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 2464 if (w->reschedule_cb)
833 2465 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2466 else if (w->interval)
2467 {
2468 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
834 /* this formula differs from the one in periodic_reify because we do not always round up */ 2469 /* this formula differs from the one in periodic_reify because we do not always round up */
835 if (w->interval)
836 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 2470 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2471 }
2472 else
2473 ev_at (w) = w->offset;
837 2474
2475 EV_FREQUENT_CHECK;
2476
2477 ++periodiccnt;
838 ev_start ((W)w, ++periodiccnt); 2478 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
839 array_needsize (periodics, periodicmax, periodiccnt, ); 2479 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
840 periodics [periodiccnt - 1] = w; 2480 ANHE_w (periodics [ev_active (w)]) = (WT)w;
841 upheap ((WT *)periodics, periodiccnt - 1); 2481 ANHE_at_cache (periodics [ev_active (w)]);
842} 2482 upheap (periodics, ev_active (w));
843 2483
844void 2484 EV_FREQUENT_CHECK;
2485
2486 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2487}
2488
2489void noinline
845evperiodic_stop (struct ev_periodic *w) 2490ev_periodic_stop (EV_P_ ev_periodic *w)
846{ 2491{
847 ev_clear ((W)w); 2492 clear_pending (EV_A_ (W)w);
848 if (!ev_is_active (w)) 2493 if (expect_false (!ev_is_active (w)))
849 return; 2494 return;
850 2495
851 if (w->active < periodiccnt--) 2496 EV_FREQUENT_CHECK;
2497
2498 {
2499 int active = ev_active (w);
2500
2501 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2502
2503 --periodiccnt;
2504
2505 if (expect_true (active < periodiccnt + HEAP0))
852 { 2506 {
853 periodics [w->active - 1] = periodics [periodiccnt]; 2507 periodics [active] = periodics [periodiccnt + HEAP0];
854 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2508 adjustheap (periodics, periodiccnt, active);
855 } 2509 }
2510 }
856 2511
2512 EV_FREQUENT_CHECK;
2513
857 ev_stop ((W)w); 2514 ev_stop (EV_A_ (W)w);
858} 2515}
859 2516
860void 2517void noinline
2518ev_periodic_again (EV_P_ ev_periodic *w)
2519{
2520 /* TODO: use adjustheap and recalculation */
2521 ev_periodic_stop (EV_A_ w);
2522 ev_periodic_start (EV_A_ w);
2523}
2524#endif
2525
2526#ifndef SA_RESTART
2527# define SA_RESTART 0
2528#endif
2529
2530void noinline
861evsignal_start (struct ev_signal *w) 2531ev_signal_start (EV_P_ ev_signal *w)
862{ 2532{
2533#if EV_MULTIPLICITY
2534 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2535#endif
863 if (ev_is_active (w)) 2536 if (expect_false (ev_is_active (w)))
864 return; 2537 return;
865 2538
2539 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2540
2541 evpipe_init (EV_A);
2542
2543 EV_FREQUENT_CHECK;
2544
2545 {
2546#ifndef _WIN32
2547 sigset_t full, prev;
2548 sigfillset (&full);
2549 sigprocmask (SIG_SETMASK, &full, &prev);
2550#endif
2551
2552 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2553
2554#ifndef _WIN32
2555 sigprocmask (SIG_SETMASK, &prev, 0);
2556#endif
2557 }
2558
866 ev_start ((W)w, 1); 2559 ev_start (EV_A_ (W)w, 1);
867 array_needsize (signals, signalmax, w->signum, signals_init);
868 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2560 wlist_add (&signals [w->signum - 1].head, (WL)w);
869 2561
870 if (!w->next) 2562 if (!((WL)w)->next)
871 { 2563 {
2564#if _WIN32
2565 signal (w->signum, ev_sighandler);
2566#else
872 struct sigaction sa; 2567 struct sigaction sa;
873 sa.sa_handler = sighandler; 2568 sa.sa_handler = ev_sighandler;
874 sigfillset (&sa.sa_mask); 2569 sigfillset (&sa.sa_mask);
875 sa.sa_flags = 0; 2570 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
876 sigaction (w->signum, &sa, 0); 2571 sigaction (w->signum, &sa, 0);
2572#endif
877 } 2573 }
878}
879 2574
880void 2575 EV_FREQUENT_CHECK;
2576}
2577
2578void noinline
881evsignal_stop (struct ev_signal *w) 2579ev_signal_stop (EV_P_ ev_signal *w)
882{ 2580{
883 ev_clear ((W)w); 2581 clear_pending (EV_A_ (W)w);
884 if (!ev_is_active (w)) 2582 if (expect_false (!ev_is_active (w)))
885 return; 2583 return;
886 2584
2585 EV_FREQUENT_CHECK;
2586
887 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2587 wlist_del (&signals [w->signum - 1].head, (WL)w);
888 ev_stop ((W)w); 2588 ev_stop (EV_A_ (W)w);
889 2589
890 if (!signals [w->signum - 1].head) 2590 if (!signals [w->signum - 1].head)
891 signal (w->signum, SIG_DFL); 2591 signal (w->signum, SIG_DFL);
892}
893 2592
894void evidle_start (struct ev_idle *w) 2593 EV_FREQUENT_CHECK;
2594}
2595
2596void
2597ev_child_start (EV_P_ ev_child *w)
895{ 2598{
2599#if EV_MULTIPLICITY
2600 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2601#endif
896 if (ev_is_active (w)) 2602 if (expect_false (ev_is_active (w)))
897 return; 2603 return;
898 2604
899 ev_start ((W)w, ++idlecnt); 2605 EV_FREQUENT_CHECK;
900 array_needsize (idles, idlemax, idlecnt, );
901 idles [idlecnt - 1] = w;
902}
903 2606
904void evidle_stop (struct ev_idle *w) 2607 ev_start (EV_A_ (W)w, 1);
2608 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2609
2610 EV_FREQUENT_CHECK;
2611}
2612
2613void
2614ev_child_stop (EV_P_ ev_child *w)
905{ 2615{
906 ev_clear ((W)w); 2616 clear_pending (EV_A_ (W)w);
907 if (ev_is_active (w)) 2617 if (expect_false (!ev_is_active (w)))
908 return; 2618 return;
909 2619
910 idles [w->active - 1] = idles [--idlecnt]; 2620 EV_FREQUENT_CHECK;
2621
2622 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
911 ev_stop ((W)w); 2623 ev_stop (EV_A_ (W)w);
912}
913 2624
914void evprepare_start (struct ev_prepare *w) 2625 EV_FREQUENT_CHECK;
2626}
2627
2628#if EV_STAT_ENABLE
2629
2630# ifdef _WIN32
2631# undef lstat
2632# define lstat(a,b) _stati64 (a,b)
2633# endif
2634
2635#define DEF_STAT_INTERVAL 5.0074891
2636#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2637#define MIN_STAT_INTERVAL 0.1074891
2638
2639static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2640
2641#if EV_USE_INOTIFY
2642# define EV_INOTIFY_BUFSIZE 8192
2643
2644static void noinline
2645infy_add (EV_P_ ev_stat *w)
915{ 2646{
916 if (ev_is_active (w)) 2647 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);
2648
2649 if (w->wd < 0)
2650 {
2651 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2652 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2653
2654 /* monitor some parent directory for speedup hints */
2655 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2656 /* but an efficiency issue only */
2657 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2658 {
2659 char path [4096];
2660 strcpy (path, w->path);
2661
2662 do
2663 {
2664 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2665 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2666
2667 char *pend = strrchr (path, '/');
2668
2669 if (!pend || pend == path)
2670 break;
2671
2672 *pend = 0;
2673 w->wd = inotify_add_watch (fs_fd, path, mask);
2674 }
2675 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2676 }
2677 }
2678
2679 if (w->wd >= 0)
2680 {
2681 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2682
2683 /* now local changes will be tracked by inotify, but remote changes won't */
2684 /* unless the filesystem it known to be local, we therefore still poll */
2685 /* also do poll on <2.6.25, but with normal frequency */
2686 struct statfs sfs;
2687
2688 if (fs_2625 && !statfs (w->path, &sfs))
2689 if (sfs.f_type == 0x1373 /* devfs */
2690 || sfs.f_type == 0xEF53 /* ext2/3 */
2691 || sfs.f_type == 0x3153464a /* jfs */
2692 || sfs.f_type == 0x52654973 /* reiser3 */
2693 || sfs.f_type == 0x01021994 /* tempfs */
2694 || sfs.f_type == 0x58465342 /* xfs */)
2695 return;
2696
2697 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2698 ev_timer_again (EV_A_ &w->timer);
2699 }
2700}
2701
2702static void noinline
2703infy_del (EV_P_ ev_stat *w)
2704{
2705 int slot;
2706 int wd = w->wd;
2707
2708 if (wd < 0)
917 return; 2709 return;
918 2710
2711 w->wd = -2;
2712 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2713 wlist_del (&fs_hash [slot].head, (WL)w);
2714
2715 /* remove this watcher, if others are watching it, they will rearm */
2716 inotify_rm_watch (fs_fd, wd);
2717}
2718
2719static void noinline
2720infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2721{
2722 if (slot < 0)
2723 /* overflow, need to check for all hash slots */
2724 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2725 infy_wd (EV_A_ slot, wd, ev);
2726 else
2727 {
2728 WL w_;
2729
2730 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2731 {
2732 ev_stat *w = (ev_stat *)w_;
2733 w_ = w_->next; /* lets us remove this watcher and all before it */
2734
2735 if (w->wd == wd || wd == -1)
2736 {
2737 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2738 {
2739 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2740 w->wd = -1;
2741 infy_add (EV_A_ w); /* re-add, no matter what */
2742 }
2743
2744 stat_timer_cb (EV_A_ &w->timer, 0);
2745 }
2746 }
2747 }
2748}
2749
2750static void
2751infy_cb (EV_P_ ev_io *w, int revents)
2752{
2753 char buf [EV_INOTIFY_BUFSIZE];
2754 struct inotify_event *ev = (struct inotify_event *)buf;
2755 int ofs;
2756 int len = read (fs_fd, buf, sizeof (buf));
2757
2758 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2759 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2760}
2761
2762inline_size void
2763check_2625 (EV_P)
2764{
2765 /* kernels < 2.6.25 are borked
2766 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2767 */
2768 struct utsname buf;
2769 int major, minor, micro;
2770
2771 if (uname (&buf))
2772 return;
2773
2774 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2775 return;
2776
2777 if (major < 2
2778 || (major == 2 && minor < 6)
2779 || (major == 2 && minor == 6 && micro < 25))
2780 return;
2781
2782 fs_2625 = 1;
2783}
2784
2785inline_size void
2786infy_init (EV_P)
2787{
2788 if (fs_fd != -2)
2789 return;
2790
2791 fs_fd = -1;
2792
2793 check_2625 (EV_A);
2794
2795 fs_fd = inotify_init ();
2796
2797 if (fs_fd >= 0)
2798 {
2799 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2800 ev_set_priority (&fs_w, EV_MAXPRI);
2801 ev_io_start (EV_A_ &fs_w);
2802 }
2803}
2804
2805inline_size void
2806infy_fork (EV_P)
2807{
2808 int slot;
2809
2810 if (fs_fd < 0)
2811 return;
2812
2813 close (fs_fd);
2814 fs_fd = inotify_init ();
2815
2816 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2817 {
2818 WL w_ = fs_hash [slot].head;
2819 fs_hash [slot].head = 0;
2820
2821 while (w_)
2822 {
2823 ev_stat *w = (ev_stat *)w_;
2824 w_ = w_->next; /* lets us add this watcher */
2825
2826 w->wd = -1;
2827
2828 if (fs_fd >= 0)
2829 infy_add (EV_A_ w); /* re-add, no matter what */
2830 else
2831 ev_timer_again (EV_A_ &w->timer);
2832 }
2833 }
2834}
2835
2836#endif
2837
2838#ifdef _WIN32
2839# define EV_LSTAT(p,b) _stati64 (p, b)
2840#else
2841# define EV_LSTAT(p,b) lstat (p, b)
2842#endif
2843
2844void
2845ev_stat_stat (EV_P_ ev_stat *w)
2846{
2847 if (lstat (w->path, &w->attr) < 0)
2848 w->attr.st_nlink = 0;
2849 else if (!w->attr.st_nlink)
2850 w->attr.st_nlink = 1;
2851}
2852
2853static void noinline
2854stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2855{
2856 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2857
2858 /* we copy this here each the time so that */
2859 /* prev has the old value when the callback gets invoked */
2860 w->prev = w->attr;
2861 ev_stat_stat (EV_A_ w);
2862
2863 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2864 if (
2865 w->prev.st_dev != w->attr.st_dev
2866 || w->prev.st_ino != w->attr.st_ino
2867 || w->prev.st_mode != w->attr.st_mode
2868 || w->prev.st_nlink != w->attr.st_nlink
2869 || w->prev.st_uid != w->attr.st_uid
2870 || w->prev.st_gid != w->attr.st_gid
2871 || w->prev.st_rdev != w->attr.st_rdev
2872 || w->prev.st_size != w->attr.st_size
2873 || w->prev.st_atime != w->attr.st_atime
2874 || w->prev.st_mtime != w->attr.st_mtime
2875 || w->prev.st_ctime != w->attr.st_ctime
2876 ) {
2877 #if EV_USE_INOTIFY
2878 if (fs_fd >= 0)
2879 {
2880 infy_del (EV_A_ w);
2881 infy_add (EV_A_ w);
2882 ev_stat_stat (EV_A_ w); /* avoid race... */
2883 }
2884 #endif
2885
2886 ev_feed_event (EV_A_ w, EV_STAT);
2887 }
2888}
2889
2890void
2891ev_stat_start (EV_P_ ev_stat *w)
2892{
2893 if (expect_false (ev_is_active (w)))
2894 return;
2895
2896 ev_stat_stat (EV_A_ w);
2897
2898 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2899 w->interval = MIN_STAT_INTERVAL;
2900
2901 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2902 ev_set_priority (&w->timer, ev_priority (w));
2903
2904#if EV_USE_INOTIFY
2905 infy_init (EV_A);
2906
2907 if (fs_fd >= 0)
2908 infy_add (EV_A_ w);
2909 else
2910#endif
2911 ev_timer_again (EV_A_ &w->timer);
2912
2913 ev_start (EV_A_ (W)w, 1);
2914
2915 EV_FREQUENT_CHECK;
2916}
2917
2918void
2919ev_stat_stop (EV_P_ ev_stat *w)
2920{
2921 clear_pending (EV_A_ (W)w);
2922 if (expect_false (!ev_is_active (w)))
2923 return;
2924
2925 EV_FREQUENT_CHECK;
2926
2927#if EV_USE_INOTIFY
2928 infy_del (EV_A_ w);
2929#endif
2930 ev_timer_stop (EV_A_ &w->timer);
2931
2932 ev_stop (EV_A_ (W)w);
2933
2934 EV_FREQUENT_CHECK;
2935}
2936#endif
2937
2938#if EV_IDLE_ENABLE
2939void
2940ev_idle_start (EV_P_ ev_idle *w)
2941{
2942 if (expect_false (ev_is_active (w)))
2943 return;
2944
2945 pri_adjust (EV_A_ (W)w);
2946
2947 EV_FREQUENT_CHECK;
2948
2949 {
2950 int active = ++idlecnt [ABSPRI (w)];
2951
2952 ++idleall;
2953 ev_start (EV_A_ (W)w, active);
2954
2955 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2956 idles [ABSPRI (w)][active - 1] = w;
2957 }
2958
2959 EV_FREQUENT_CHECK;
2960}
2961
2962void
2963ev_idle_stop (EV_P_ ev_idle *w)
2964{
2965 clear_pending (EV_A_ (W)w);
2966 if (expect_false (!ev_is_active (w)))
2967 return;
2968
2969 EV_FREQUENT_CHECK;
2970
2971 {
2972 int active = ev_active (w);
2973
2974 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2975 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2976
2977 ev_stop (EV_A_ (W)w);
2978 --idleall;
2979 }
2980
2981 EV_FREQUENT_CHECK;
2982}
2983#endif
2984
2985void
2986ev_prepare_start (EV_P_ ev_prepare *w)
2987{
2988 if (expect_false (ev_is_active (w)))
2989 return;
2990
2991 EV_FREQUENT_CHECK;
2992
919 ev_start ((W)w, ++preparecnt); 2993 ev_start (EV_A_ (W)w, ++preparecnt);
920 array_needsize (prepares, preparemax, preparecnt, ); 2994 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
921 prepares [preparecnt - 1] = w; 2995 prepares [preparecnt - 1] = w;
922}
923 2996
2997 EV_FREQUENT_CHECK;
2998}
2999
3000void
924void evprepare_stop (struct ev_prepare *w) 3001ev_prepare_stop (EV_P_ ev_prepare *w)
925{ 3002{
926 ev_clear ((W)w); 3003 clear_pending (EV_A_ (W)w);
927 if (ev_is_active (w)) 3004 if (expect_false (!ev_is_active (w)))
928 return; 3005 return;
929 3006
3007 EV_FREQUENT_CHECK;
3008
3009 {
3010 int active = ev_active (w);
3011
930 prepares [w->active - 1] = prepares [--preparecnt]; 3012 prepares [active - 1] = prepares [--preparecnt];
3013 ev_active (prepares [active - 1]) = active;
3014 }
3015
931 ev_stop ((W)w); 3016 ev_stop (EV_A_ (W)w);
932}
933 3017
3018 EV_FREQUENT_CHECK;
3019}
3020
3021void
934void evcheck_start (struct ev_check *w) 3022ev_check_start (EV_P_ ev_check *w)
935{ 3023{
936 if (ev_is_active (w)) 3024 if (expect_false (ev_is_active (w)))
937 return; 3025 return;
938 3026
3027 EV_FREQUENT_CHECK;
3028
939 ev_start ((W)w, ++checkcnt); 3029 ev_start (EV_A_ (W)w, ++checkcnt);
940 array_needsize (checks, checkmax, checkcnt, ); 3030 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
941 checks [checkcnt - 1] = w; 3031 checks [checkcnt - 1] = w;
942}
943 3032
3033 EV_FREQUENT_CHECK;
3034}
3035
3036void
944void evcheck_stop (struct ev_check *w) 3037ev_check_stop (EV_P_ ev_check *w)
945{ 3038{
946 ev_clear ((W)w); 3039 clear_pending (EV_A_ (W)w);
947 if (ev_is_active (w)) 3040 if (expect_false (!ev_is_active (w)))
948 return; 3041 return;
949 3042
3043 EV_FREQUENT_CHECK;
3044
3045 {
3046 int active = ev_active (w);
3047
950 checks [w->active - 1] = checks [--checkcnt]; 3048 checks [active - 1] = checks [--checkcnt];
3049 ev_active (checks [active - 1]) = active;
3050 }
3051
951 ev_stop ((W)w); 3052 ev_stop (EV_A_ (W)w);
952}
953 3053
954void evchild_start (struct ev_child *w) 3054 EV_FREQUENT_CHECK;
3055}
3056
3057#if EV_EMBED_ENABLE
3058void noinline
3059ev_embed_sweep (EV_P_ ev_embed *w)
955{ 3060{
3061 ev_loop (w->other, EVLOOP_NONBLOCK);
3062}
3063
3064static void
3065embed_io_cb (EV_P_ ev_io *io, int revents)
3066{
3067 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3068
956 if (ev_is_active (w)) 3069 if (ev_cb (w))
3070 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3071 else
3072 ev_loop (w->other, EVLOOP_NONBLOCK);
3073}
3074
3075static void
3076embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3077{
3078 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3079
3080 {
3081 struct ev_loop *loop = w->other;
3082
3083 while (fdchangecnt)
3084 {
3085 fd_reify (EV_A);
3086 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3087 }
3088 }
3089}
3090
3091static void
3092embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3093{
3094 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3095
3096 ev_embed_stop (EV_A_ w);
3097
3098 {
3099 struct ev_loop *loop = w->other;
3100
3101 ev_loop_fork (EV_A);
3102 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3103 }
3104
3105 ev_embed_start (EV_A_ w);
3106}
3107
3108#if 0
3109static void
3110embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3111{
3112 ev_idle_stop (EV_A_ idle);
3113}
3114#endif
3115
3116void
3117ev_embed_start (EV_P_ ev_embed *w)
3118{
3119 if (expect_false (ev_is_active (w)))
957 return; 3120 return;
958 3121
3122 {
3123 struct ev_loop *loop = w->other;
3124 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3125 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3126 }
3127
3128 EV_FREQUENT_CHECK;
3129
3130 ev_set_priority (&w->io, ev_priority (w));
3131 ev_io_start (EV_A_ &w->io);
3132
3133 ev_prepare_init (&w->prepare, embed_prepare_cb);
3134 ev_set_priority (&w->prepare, EV_MINPRI);
3135 ev_prepare_start (EV_A_ &w->prepare);
3136
3137 ev_fork_init (&w->fork, embed_fork_cb);
3138 ev_fork_start (EV_A_ &w->fork);
3139
3140 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3141
959 ev_start ((W)w, 1); 3142 ev_start (EV_A_ (W)w, 1);
960 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
961}
962 3143
963void evchild_stop (struct ev_child *w) 3144 EV_FREQUENT_CHECK;
3145}
3146
3147void
3148ev_embed_stop (EV_P_ ev_embed *w)
964{ 3149{
965 ev_clear ((W)w); 3150 clear_pending (EV_A_ (W)w);
966 if (ev_is_active (w)) 3151 if (expect_false (!ev_is_active (w)))
967 return; 3152 return;
968 3153
969 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 3154 EV_FREQUENT_CHECK;
3155
3156 ev_io_stop (EV_A_ &w->io);
3157 ev_prepare_stop (EV_A_ &w->prepare);
3158 ev_fork_stop (EV_A_ &w->fork);
3159
3160 EV_FREQUENT_CHECK;
3161}
3162#endif
3163
3164#if EV_FORK_ENABLE
3165void
3166ev_fork_start (EV_P_ ev_fork *w)
3167{
3168 if (expect_false (ev_is_active (w)))
3169 return;
3170
3171 EV_FREQUENT_CHECK;
3172
3173 ev_start (EV_A_ (W)w, ++forkcnt);
3174 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3175 forks [forkcnt - 1] = w;
3176
3177 EV_FREQUENT_CHECK;
3178}
3179
3180void
3181ev_fork_stop (EV_P_ ev_fork *w)
3182{
3183 clear_pending (EV_A_ (W)w);
3184 if (expect_false (!ev_is_active (w)))
3185 return;
3186
3187 EV_FREQUENT_CHECK;
3188
3189 {
3190 int active = ev_active (w);
3191
3192 forks [active - 1] = forks [--forkcnt];
3193 ev_active (forks [active - 1]) = active;
3194 }
3195
970 ev_stop ((W)w); 3196 ev_stop (EV_A_ (W)w);
3197
3198 EV_FREQUENT_CHECK;
971} 3199}
3200#endif
3201
3202#if EV_ASYNC_ENABLE
3203void
3204ev_async_start (EV_P_ ev_async *w)
3205{
3206 if (expect_false (ev_is_active (w)))
3207 return;
3208
3209 evpipe_init (EV_A);
3210
3211 EV_FREQUENT_CHECK;
3212
3213 ev_start (EV_A_ (W)w, ++asynccnt);
3214 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3215 asyncs [asynccnt - 1] = w;
3216
3217 EV_FREQUENT_CHECK;
3218}
3219
3220void
3221ev_async_stop (EV_P_ ev_async *w)
3222{
3223 clear_pending (EV_A_ (W)w);
3224 if (expect_false (!ev_is_active (w)))
3225 return;
3226
3227 EV_FREQUENT_CHECK;
3228
3229 {
3230 int active = ev_active (w);
3231
3232 asyncs [active - 1] = asyncs [--asynccnt];
3233 ev_active (asyncs [active - 1]) = active;
3234 }
3235
3236 ev_stop (EV_A_ (W)w);
3237
3238 EV_FREQUENT_CHECK;
3239}
3240
3241void
3242ev_async_send (EV_P_ ev_async *w)
3243{
3244 w->sent = 1;
3245 evpipe_write (EV_A_ &gotasync);
3246}
3247#endif
972 3248
973/*****************************************************************************/ 3249/*****************************************************************************/
974 3250
975struct ev_once 3251struct ev_once
976{ 3252{
977 struct ev_io io; 3253 ev_io io;
978 struct ev_timer to; 3254 ev_timer to;
979 void (*cb)(int revents, void *arg); 3255 void (*cb)(int revents, void *arg);
980 void *arg; 3256 void *arg;
981}; 3257};
982 3258
983static void 3259static void
984once_cb (struct ev_once *once, int revents) 3260once_cb (EV_P_ struct ev_once *once, int revents)
985{ 3261{
986 void (*cb)(int revents, void *arg) = once->cb; 3262 void (*cb)(int revents, void *arg) = once->cb;
987 void *arg = once->arg; 3263 void *arg = once->arg;
988 3264
989 evio_stop (&once->io); 3265 ev_io_stop (EV_A_ &once->io);
990 evtimer_stop (&once->to); 3266 ev_timer_stop (EV_A_ &once->to);
991 free (once); 3267 ev_free (once);
992 3268
993 cb (revents, arg); 3269 cb (revents, arg);
994} 3270}
995 3271
996static void 3272static void
997once_cb_io (struct ev_io *w, int revents) 3273once_cb_io (EV_P_ ev_io *w, int revents)
998{ 3274{
999 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3275 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3276
3277 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1000} 3278}
1001 3279
1002static void 3280static void
1003once_cb_to (struct ev_timer *w, int revents) 3281once_cb_to (EV_P_ ev_timer *w, int revents)
1004{ 3282{
1005 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3283 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
1006}
1007 3284
3285 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3286}
3287
1008void 3288void
1009ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3289ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1010{ 3290{
1011 struct ev_once *once = malloc (sizeof (struct ev_once)); 3291 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1012 3292
1013 if (!once) 3293 if (expect_false (!once))
1014 cb (EV_ERROR, arg); 3294 {
1015 else 3295 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
3296 return;
1016 { 3297 }
3298
1017 once->cb = cb; 3299 once->cb = cb;
1018 once->arg = arg; 3300 once->arg = arg;
1019 3301
1020 evw_init (&once->io, once_cb_io); 3302 ev_init (&once->io, once_cb_io);
1021
1022 if (fd >= 0) 3303 if (fd >= 0)
3304 {
3305 ev_io_set (&once->io, fd, events);
3306 ev_io_start (EV_A_ &once->io);
3307 }
3308
3309 ev_init (&once->to, once_cb_to);
3310 if (timeout >= 0.)
3311 {
3312 ev_timer_set (&once->to, timeout, 0.);
3313 ev_timer_start (EV_A_ &once->to);
3314 }
3315}
3316
3317/*****************************************************************************/
3318
3319#if EV_WALK_ENABLE
3320void
3321ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3322{
3323 int i, j;
3324 ev_watcher_list *wl, *wn;
3325
3326 if (types & (EV_IO | EV_EMBED))
3327 for (i = 0; i < anfdmax; ++i)
3328 for (wl = anfds [i].head; wl; )
1023 { 3329 {
1024 evio_set (&once->io, fd, events); 3330 wn = wl->next;
1025 evio_start (&once->io); 3331
3332#if EV_EMBED_ENABLE
3333 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3334 {
3335 if (types & EV_EMBED)
3336 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3337 }
3338 else
3339#endif
3340#if EV_USE_INOTIFY
3341 if (ev_cb ((ev_io *)wl) == infy_cb)
3342 ;
3343 else
3344#endif
3345 if ((ev_io *)wl != &pipe_w)
3346 if (types & EV_IO)
3347 cb (EV_A_ EV_IO, wl);
3348
3349 wl = wn;
1026 } 3350 }
1027 3351
1028 evw_init (&once->to, once_cb_to); 3352 if (types & (EV_TIMER | EV_STAT))
1029 3353 for (i = timercnt + HEAP0; i-- > HEAP0; )
1030 if (timeout >= 0.) 3354#if EV_STAT_ENABLE
3355 /*TODO: timer is not always active*/
3356 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1031 { 3357 {
1032 evtimer_set (&once->to, timeout, 0.); 3358 if (types & EV_STAT)
1033 evtimer_start (&once->to); 3359 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1034 } 3360 }
1035 } 3361 else
1036} 3362#endif
3363 if (types & EV_TIMER)
3364 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1037 3365
1038/*****************************************************************************/ 3366#if EV_PERIODIC_ENABLE
3367 if (types & EV_PERIODIC)
3368 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3369 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3370#endif
1039 3371
1040#if 0 3372#if EV_IDLE_ENABLE
3373 if (types & EV_IDLE)
3374 for (j = NUMPRI; i--; )
3375 for (i = idlecnt [j]; i--; )
3376 cb (EV_A_ EV_IDLE, idles [j][i]);
3377#endif
1041 3378
1042struct ev_io wio; 3379#if EV_FORK_ENABLE
3380 if (types & EV_FORK)
3381 for (i = forkcnt; i--; )
3382 if (ev_cb (forks [i]) != embed_fork_cb)
3383 cb (EV_A_ EV_FORK, forks [i]);
3384#endif
1043 3385
1044static void 3386#if EV_ASYNC_ENABLE
1045sin_cb (struct ev_io *w, int revents) 3387 if (types & EV_ASYNC)
1046{ 3388 for (i = asynccnt; i--; )
1047 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 3389 cb (EV_A_ EV_ASYNC, asyncs [i]);
1048} 3390#endif
1049 3391
1050static void 3392 if (types & EV_PREPARE)
1051ocb (struct ev_timer *w, int revents) 3393 for (i = preparecnt; i--; )
1052{ 3394#if EV_EMBED_ENABLE
1053 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 3395 if (ev_cb (prepares [i]) != embed_prepare_cb)
1054 evtimer_stop (w); 3396#endif
1055 evtimer_start (w); 3397 cb (EV_A_ EV_PREPARE, prepares [i]);
1056}
1057 3398
1058static void 3399 if (types & EV_CHECK)
1059scb (struct ev_signal *w, int revents) 3400 for (i = checkcnt; i--; )
1060{ 3401 cb (EV_A_ EV_CHECK, checks [i]);
1061 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1062 evio_stop (&wio);
1063 evio_start (&wio);
1064}
1065 3402
1066static void 3403 if (types & EV_SIGNAL)
1067gcb (struct ev_signal *w, int revents)
1068{
1069 fprintf (stderr, "generic %x\n", revents);
1070
1071}
1072
1073int main (void)
1074{
1075 ev_init (0);
1076
1077 evio_init (&wio, sin_cb, 0, EV_READ);
1078 evio_start (&wio);
1079
1080 struct ev_timer t[10000];
1081
1082#if 0
1083 int i;
1084 for (i = 0; i < 10000; ++i) 3404 for (i = 0; i < signalmax; ++i)
1085 { 3405 for (wl = signals [i].head; wl; )
1086 struct ev_timer *w = t + i; 3406 {
1087 evw_init (w, ocb, i); 3407 wn = wl->next;
1088 evtimer_init_abs (w, ocb, drand48 (), 0.99775533); 3408 cb (EV_A_ EV_SIGNAL, wl);
1089 evtimer_start (w); 3409 wl = wn;
1090 if (drand48 () < 0.5) 3410 }
1091 evtimer_stop (w);
1092 }
1093#endif
1094 3411
1095 struct ev_timer t1; 3412 if (types & EV_CHILD)
1096 evtimer_init (&t1, ocb, 5, 10); 3413 for (i = EV_PID_HASHSIZE; i--; )
1097 evtimer_start (&t1); 3414 for (wl = childs [i]; wl; )
1098 3415 {
1099 struct ev_signal sig; 3416 wn = wl->next;
1100 evsignal_init (&sig, scb, SIGQUIT); 3417 cb (EV_A_ EV_CHILD, wl);
1101 evsignal_start (&sig); 3418 wl = wn;
1102 3419 }
1103 struct ev_check cw; 3420/* EV_STAT 0x00001000 /* stat data changed */
1104 evcheck_init (&cw, gcb); 3421/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
1105 evcheck_start (&cw);
1106
1107 struct ev_idle iw;
1108 evidle_init (&iw, gcb);
1109 evidle_start (&iw);
1110
1111 ev_loop (0);
1112
1113 return 0;
1114} 3422}
1115
1116#endif 3423#endif
1117 3424
3425#if EV_MULTIPLICITY
3426 #include "ev_wrap.h"
3427#endif
1118 3428
3429#ifdef __cplusplus
3430}
3431#endif
1119 3432
1120

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