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Comparing libev/ev.c (file contents):
Revision 1.37 by root, Thu Nov 1 13:33:12 2007 UTC vs.
Revision 1.296 by root, Thu Jul 9 09:11:20 2009 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE
31#if EV_USE_CONFIG_H 46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
32# include "config.h" 49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 0
57# endif
58# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1
60# endif
61# endif
62# 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
33#endif 146#endif
34 147
35#include <math.h> 148#include <math.h>
36#include <stdlib.h> 149#include <stdlib.h>
37#include <unistd.h>
38#include <fcntl.h> 150#include <fcntl.h>
39#include <signal.h>
40#include <stddef.h> 151#include <stddef.h>
41 152
42#include <stdio.h> 153#include <stdio.h>
43 154
44#include <assert.h> 155#include <assert.h>
45#include <errno.h> 156#include <errno.h>
46#include <sys/types.h> 157#include <sys/types.h>
47#include <sys/wait.h>
48#include <sys/time.h>
49#include <time.h> 158#include <time.h>
50 159
160#include <signal.h>
161
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
178# endif
179#endif
180
181/* this block tries to deduce configuration from header-defined symbols and defaults */
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
188# endif
189#endif
190
51#ifndef EV_USE_MONOTONIC 191#ifndef EV_USE_MONOTONIC
192# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
52# define EV_USE_MONOTONIC 1 193# define EV_USE_MONOTONIC 1
194# else
195# define EV_USE_MONOTONIC 0
53#endif 196# endif
197#endif
198
199#ifndef EV_USE_REALTIME
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
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 */
54 304
55#ifndef CLOCK_MONOTONIC 305#ifndef CLOCK_MONOTONIC
56# undef EV_USE_MONOTONIC 306# undef EV_USE_MONOTONIC
57# define EV_USE_MONOTONIC 0 307# define EV_USE_MONOTONIC 0
58#endif 308#endif
59 309
60#ifndef EV_USE_SELECT
61# define EV_USE_SELECT 1
62#endif
63
64#ifndef EV_USE_EPOLL
65# define EV_USE_EPOLL 0
66#endif
67
68#ifndef CLOCK_REALTIME 310#ifndef CLOCK_REALTIME
311# undef EV_USE_REALTIME
69# define EV_USE_REALTIME 0 312# define EV_USE_REALTIME 0
70#endif 313#endif
71#ifndef EV_USE_REALTIME 314
72# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */ 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>
73#endif 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 */
74 370
75#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) */
76#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */ 372#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
77#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
78#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */ 373/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
79 374
80#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
81 385
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
82typedef struct ev_watcher *W; 407typedef ev_watcher *W;
83typedef struct ev_watcher_list *WL; 408typedef ev_watcher_list *WL;
84typedef struct ev_watcher_time *WT; 409typedef ev_watcher_time *WT;
85 410
86static ev_tstamp now, diff; /* monotonic clock */ 411#define ev_active(w) ((W)(w))->active
87ev_tstamp ev_now; 412#define ev_at(w) ((WT)(w))->at
88int ev_method;
89 413
90static 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
91 419
92static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 420#if EV_USE_MONOTONIC
93static void (*method_modify)(int fd, int oev, int nev); 421static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
94static void (*method_poll)(ev_tstamp timeout); 422#endif
423
424#ifdef _WIN32
425# include "ev_win32.c"
426#endif
95 427
96/*****************************************************************************/ 428/*****************************************************************************/
97 429
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/*****************************************************************************/
573
574#ifndef EV_HAVE_EV_TIME
98ev_tstamp 575ev_tstamp
99ev_time (void) 576ev_time (void)
100{ 577{
101#if EV_USE_REALTIME 578#if EV_USE_REALTIME
579 if (expect_true (have_realtime))
580 {
102 struct timespec ts; 581 struct timespec ts;
103 clock_gettime (CLOCK_REALTIME, &ts); 582 clock_gettime (CLOCK_REALTIME, &ts);
104 return ts.tv_sec + ts.tv_nsec * 1e-9; 583 return ts.tv_sec + ts.tv_nsec * 1e-9;
105#else 584 }
585#endif
586
106 struct timeval tv; 587 struct timeval tv;
107 gettimeofday (&tv, 0); 588 gettimeofday (&tv, 0);
108 return tv.tv_sec + tv.tv_usec * 1e-6; 589 return tv.tv_sec + tv.tv_usec * 1e-6;
109#endif
110} 590}
591#endif
111 592
112static ev_tstamp 593inline_size ev_tstamp
113get_clock (void) 594get_clock (void)
114{ 595{
115#if EV_USE_MONOTONIC 596#if EV_USE_MONOTONIC
116 if (have_monotonic) 597 if (expect_true (have_monotonic))
117 { 598 {
118 struct timespec ts; 599 struct timespec ts;
119 clock_gettime (CLOCK_MONOTONIC, &ts); 600 clock_gettime (CLOCK_MONOTONIC, &ts);
120 return ts.tv_sec + ts.tv_nsec * 1e-9; 601 return ts.tv_sec + ts.tv_nsec * 1e-9;
121 } 602 }
122#endif 603#endif
123 604
124 return ev_time (); 605 return ev_time ();
125} 606}
126 607
127#define array_roundsize(base,n) ((n) | 4 & ~3) 608#if EV_MULTIPLICITY
609ev_tstamp
610ev_now (EV_P)
611{
612 return ev_rt_now;
613}
614#endif
128 615
129#define array_needsize(base,cur,cnt,init) \ 616void
130 if ((cnt) > cur) \ 617ev_sleep (ev_tstamp delay)
131 { \ 618{
132 int newcnt = cur; \ 619 if (delay > 0.)
133 do \
134 { \
135 newcnt = array_roundsize (base, newcnt << 1); \
136 } \
137 while ((cnt) > newcnt); \
138 \
139 base = realloc (base, sizeof (*base) * (newcnt)); \
140 init (base + cur, newcnt - cur); \
141 cur = newcnt; \
142 } 620 {
621#if EV_USE_NANOSLEEP
622 struct timespec ts;
623
624 ts.tv_sec = (time_t)delay;
625 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
626
627 nanosleep (&ts, 0);
628#elif defined(_WIN32)
629 Sleep ((unsigned long)(delay * 1e3));
630#else
631 struct timeval tv;
632
633 tv.tv_sec = (time_t)delay;
634 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
635
636 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
637 /* somehting not guaranteed by newer posix versions, but guaranteed */
638 /* by older ones */
639 select (0, 0, 0, 0, &tv);
640#endif
641 }
642}
143 643
144/*****************************************************************************/ 644/*****************************************************************************/
145 645
146typedef struct 646#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
147{
148 struct ev_io *head;
149 unsigned char events;
150 unsigned char reify;
151} ANFD;
152 647
153static ANFD *anfds; 648/* find a suitable new size for the given array, */
154static int anfdmax; 649/* hopefully by rounding to a ncie-to-malloc size */
155 650inline_size int
156static void 651array_nextsize (int elem, int cur, int cnt)
157anfds_init (ANFD *base, int count)
158{ 652{
159 while (count--) 653 int ncur = cur + 1;
160 {
161 base->head = 0;
162 base->events = EV_NONE;
163 base->reify = 0;
164 654
165 ++base; 655 do
656 ncur <<= 1;
657 while (cnt > ncur);
658
659 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
660 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
166 } 661 {
167} 662 ncur *= elem;
168 663 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
169typedef struct 664 ncur = ncur - sizeof (void *) * 4;
170{ 665 ncur /= elem;
171 W w;
172 int events;
173} ANPENDING;
174
175static ANPENDING *pendings;
176static int pendingmax, pendingcnt;
177
178static void
179event (W w, int events)
180{
181 if (w->pending)
182 { 666 }
667
668 return ncur;
669}
670
671static noinline void *
672array_realloc (int elem, void *base, int *cur, int cnt)
673{
674 *cur = array_nextsize (elem, *cur, cnt);
675 return ev_realloc (base, elem * *cur);
676}
677
678#define array_init_zero(base,count) \
679 memset ((void *)(base), 0, sizeof (*(base)) * (count))
680
681#define array_needsize(type,base,cur,cnt,init) \
682 if (expect_false ((cnt) > (cur))) \
683 { \
684 int ocur_ = (cur); \
685 (base) = (type *)array_realloc \
686 (sizeof (type), (base), &(cur), (cnt)); \
687 init ((base) + (ocur_), (cur) - ocur_); \
688 }
689
690#if 0
691#define array_slim(type,stem) \
692 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
693 { \
694 stem ## max = array_roundsize (stem ## cnt >> 1); \
695 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
696 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
697 }
698#endif
699
700#define array_free(stem, idx) \
701 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
702
703/*****************************************************************************/
704
705/* dummy callback for pending events */
706static void noinline
707pendingcb (EV_P_ ev_prepare *w, int revents)
708{
709}
710
711void noinline
712ev_feed_event (EV_P_ void *w, int revents)
713{
714 W w_ = (W)w;
715 int pri = ABSPRI (w_);
716
717 if (expect_false (w_->pending))
718 pendings [pri][w_->pending - 1].events |= revents;
719 else
720 {
721 w_->pending = ++pendingcnt [pri];
722 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
723 pendings [pri][w_->pending - 1].w = w_;
183 pendings [w->pending - 1].events |= events; 724 pendings [pri][w_->pending - 1].events = revents;
184 return;
185 } 725 }
186
187 w->pending = ++pendingcnt;
188 array_needsize (pendings, pendingmax, pendingcnt, );
189 pendings [pendingcnt - 1].w = w;
190 pendings [pendingcnt - 1].events = events;
191} 726}
192 727
193static void 728inline_speed void
729feed_reverse (EV_P_ W w)
730{
731 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
732 rfeeds [rfeedcnt++] = w;
733}
734
735inline_size void
736feed_reverse_done (EV_P_ int revents)
737{
738 do
739 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
740 while (rfeedcnt);
741}
742
743inline_speed void
194queue_events (W *events, int eventcnt, int type) 744queue_events (EV_P_ W *events, int eventcnt, int type)
195{ 745{
196 int i; 746 int i;
197 747
198 for (i = 0; i < eventcnt; ++i) 748 for (i = 0; i < eventcnt; ++i)
199 event (events [i], type); 749 ev_feed_event (EV_A_ events [i], type);
200} 750}
201 751
202static void 752/*****************************************************************************/
753
754inline_speed void
203fd_event (int fd, int events) 755fd_event (EV_P_ int fd, int revents)
204{ 756{
205 ANFD *anfd = anfds + fd; 757 ANFD *anfd = anfds + fd;
206 struct ev_io *w; 758 ev_io *w;
207 759
208 for (w = anfd->head; w; w = w->next) 760 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
209 { 761 {
210 int ev = w->events & events; 762 int ev = w->events & revents;
211 763
212 if (ev) 764 if (ev)
213 event ((W)w, ev); 765 ev_feed_event (EV_A_ (W)w, ev);
214 } 766 }
215} 767}
216 768
217/*****************************************************************************/ 769void
770ev_feed_fd_event (EV_P_ int fd, int revents)
771{
772 if (fd >= 0 && fd < anfdmax)
773 fd_event (EV_A_ fd, revents);
774}
218 775
219static int *fdchanges; 776/* make sure the external fd watch events are in-sync */
220static int fdchangemax, fdchangecnt; 777/* with the kernel/libev internal state */
221 778inline_size void
222static void 779fd_reify (EV_P)
223fd_reify (void)
224{ 780{
225 int i; 781 int i;
226 782
227 for (i = 0; i < fdchangecnt; ++i) 783 for (i = 0; i < fdchangecnt; ++i)
228 { 784 {
229 int fd = fdchanges [i]; 785 int fd = fdchanges [i];
230 ANFD *anfd = anfds + fd; 786 ANFD *anfd = anfds + fd;
231 struct ev_io *w; 787 ev_io *w;
232 788
233 int events = 0; 789 unsigned char events = 0;
234 790
235 for (w = anfd->head; w; w = w->next) 791 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
236 events |= w->events; 792 events |= (unsigned char)w->events;
237 793
238 anfd->reify = 0; 794#if EV_SELECT_IS_WINSOCKET
239 795 if (events)
240 if (anfd->events != events)
241 { 796 {
242 method_modify (fd, anfd->events, events); 797 unsigned long arg;
243 anfd->events = events; 798 #ifdef EV_FD_TO_WIN32_HANDLE
799 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
800 #else
801 anfd->handle = _get_osfhandle (fd);
802 #endif
803 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
244 } 804 }
805#endif
806
807 {
808 unsigned char o_events = anfd->events;
809 unsigned char o_reify = anfd->reify;
810
811 anfd->reify = 0;
812 anfd->events = events;
813
814 if (o_events != events || o_reify & EV__IOFDSET)
815 backend_modify (EV_A_ fd, o_events, events);
816 }
245 } 817 }
246 818
247 fdchangecnt = 0; 819 fdchangecnt = 0;
248} 820}
249 821
250static void 822/* something about the given fd changed */
251fd_change (int fd) 823inline_size void
824fd_change (EV_P_ int fd, int flags)
252{ 825{
253 if (anfds [fd].reify || fdchangecnt < 0) 826 unsigned char reify = anfds [fd].reify;
254 return;
255
256 anfds [fd].reify = 1; 827 anfds [fd].reify |= flags;
257 828
829 if (expect_true (!reify))
830 {
258 ++fdchangecnt; 831 ++fdchangecnt;
259 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 832 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
260 fdchanges [fdchangecnt - 1] = fd; 833 fdchanges [fdchangecnt - 1] = fd;
834 }
835}
836
837/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
838inline_speed void
839fd_kill (EV_P_ int fd)
840{
841 ev_io *w;
842
843 while ((w = (ev_io *)anfds [fd].head))
844 {
845 ev_io_stop (EV_A_ w);
846 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
847 }
848}
849
850/* check whether the given fd is atcually valid, for error recovery */
851inline_size int
852fd_valid (int fd)
853{
854#ifdef _WIN32
855 return _get_osfhandle (fd) != -1;
856#else
857 return fcntl (fd, F_GETFD) != -1;
858#endif
261} 859}
262 860
263/* called on EBADF to verify fds */ 861/* called on EBADF to verify fds */
264static void 862static void noinline
265fd_recheck (void) 863fd_ebadf (EV_P)
266{ 864{
267 int fd; 865 int fd;
268 866
269 for (fd = 0; fd < anfdmax; ++fd) 867 for (fd = 0; fd < anfdmax; ++fd)
270 if (anfds [fd].events) 868 if (anfds [fd].events)
271 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 869 if (!fd_valid (fd) && errno == EBADF)
272 while (anfds [fd].head) 870 fd_kill (EV_A_ fd);
871}
872
873/* called on ENOMEM in select/poll to kill some fds and retry */
874static void noinline
875fd_enomem (EV_P)
876{
877 int fd;
878
879 for (fd = anfdmax; fd--; )
880 if (anfds [fd].events)
273 { 881 {
274 ev_io_stop (anfds [fd].head); 882 fd_kill (EV_A_ fd);
275 event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE); 883 return;
276 } 884 }
885}
886
887/* usually called after fork if backend needs to re-arm all fds from scratch */
888static void noinline
889fd_rearm_all (EV_P)
890{
891 int fd;
892
893 for (fd = 0; fd < anfdmax; ++fd)
894 if (anfds [fd].events)
895 {
896 anfds [fd].events = 0;
897 anfds [fd].emask = 0;
898 fd_change (EV_A_ fd, EV__IOFDSET | 1);
899 }
277} 900}
278 901
279/*****************************************************************************/ 902/*****************************************************************************/
280 903
281static struct ev_timer **timers; 904/*
282static int timermax, timercnt; 905 * the heap functions want a real array index. array index 0 uis guaranteed to not
906 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
907 * the branching factor of the d-tree.
908 */
283 909
284static struct ev_periodic **periodics; 910/*
285static int periodicmax, periodiccnt; 911 * at the moment we allow libev the luxury of two heaps,
912 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
913 * which is more cache-efficient.
914 * the difference is about 5% with 50000+ watchers.
915 */
916#if EV_USE_4HEAP
286 917
287static void 918#define DHEAP 4
288upheap (WT *timers, int k) 919#define HEAP0 (DHEAP - 1) /* index of first element in heap */
289{ 920#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
290 WT w = timers [k]; 921#define UPHEAP_DONE(p,k) ((p) == (k))
291 922
292 while (k && timers [k >> 1]->at > w->at) 923/* away from the root */
293 { 924inline_speed void
294 timers [k] = timers [k >> 1];
295 timers [k]->active = k + 1;
296 k >>= 1;
297 }
298
299 timers [k] = w;
300 timers [k]->active = k + 1;
301
302}
303
304static void
305downheap (WT *timers, int N, int k) 925downheap (ANHE *heap, int N, int k)
306{ 926{
307 WT w = timers [k]; 927 ANHE he = heap [k];
928 ANHE *E = heap + N + HEAP0;
308 929
309 while (k < (N >> 1)) 930 for (;;)
310 { 931 {
311 int j = k << 1; 932 ev_tstamp minat;
933 ANHE *minpos;
934 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
312 935
313 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 936 /* find minimum child */
937 if (expect_true (pos + DHEAP - 1 < E))
314 ++j; 938 {
315 939 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
316 if (w->at <= timers [j]->at) 940 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
941 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
942 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
943 }
944 else if (pos < E)
945 {
946 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
947 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
948 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
949 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
950 }
951 else
317 break; 952 break;
318 953
319 timers [k] = timers [j]; 954 if (ANHE_at (he) <= minat)
320 timers [k]->active = k + 1; 955 break;
956
957 heap [k] = *minpos;
958 ev_active (ANHE_w (*minpos)) = k;
959
960 k = minpos - heap;
961 }
962
963 heap [k] = he;
964 ev_active (ANHE_w (he)) = k;
965}
966
967#else /* 4HEAP */
968
969#define HEAP0 1
970#define HPARENT(k) ((k) >> 1)
971#define UPHEAP_DONE(p,k) (!(p))
972
973/* away from the root */
974inline_speed void
975downheap (ANHE *heap, int N, int k)
976{
977 ANHE he = heap [k];
978
979 for (;;)
980 {
981 int c = k << 1;
982
983 if (c > N + HEAP0 - 1)
984 break;
985
986 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
987 ? 1 : 0;
988
989 if (ANHE_at (he) <= ANHE_at (heap [c]))
990 break;
991
992 heap [k] = heap [c];
993 ev_active (ANHE_w (heap [k])) = k;
994
321 k = j; 995 k = c;
996 }
997
998 heap [k] = he;
999 ev_active (ANHE_w (he)) = k;
1000}
1001#endif
1002
1003/* towards the root */
1004inline_speed void
1005upheap (ANHE *heap, int k)
1006{
1007 ANHE he = heap [k];
1008
1009 for (;;)
322 } 1010 {
1011 int p = HPARENT (k);
323 1012
324 timers [k] = w; 1013 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
325 timers [k]->active = k + 1; 1014 break;
1015
1016 heap [k] = heap [p];
1017 ev_active (ANHE_w (heap [k])) = k;
1018 k = p;
1019 }
1020
1021 heap [k] = he;
1022 ev_active (ANHE_w (he)) = k;
1023}
1024
1025/* move an element suitably so it is in a correct place */
1026inline_size void
1027adjustheap (ANHE *heap, int N, int k)
1028{
1029 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
1030 upheap (heap, k);
1031 else
1032 downheap (heap, N, k);
1033}
1034
1035/* rebuild the heap: this function is used only once and executed rarely */
1036inline_size void
1037reheap (ANHE *heap, int N)
1038{
1039 int i;
1040
1041 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1042 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1043 for (i = 0; i < N; ++i)
1044 upheap (heap, i + HEAP0);
326} 1045}
327 1046
328/*****************************************************************************/ 1047/*****************************************************************************/
329 1048
1049/* associate signal watchers to a signal signal */
330typedef struct 1050typedef struct
331{ 1051{
332 struct ev_signal *head; 1052 WL head;
333 sig_atomic_t volatile gotsig; 1053 EV_ATOMIC_T gotsig;
334} ANSIG; 1054} ANSIG;
335 1055
336static ANSIG *signals; 1056static ANSIG *signals;
337static int signalmax; 1057static int signalmax;
338 1058
339static int sigpipe [2]; 1059static EV_ATOMIC_T gotsig;
340static sig_atomic_t volatile gotsig;
341static struct ev_io sigev;
342 1060
1061/*****************************************************************************/
1062
1063/* used to prepare libev internal fd's */
1064/* this is not fork-safe */
1065inline_speed void
1066fd_intern (int fd)
1067{
1068#ifdef _WIN32
1069 unsigned long arg = 1;
1070 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1071#else
1072 fcntl (fd, F_SETFD, FD_CLOEXEC);
1073 fcntl (fd, F_SETFL, O_NONBLOCK);
1074#endif
1075}
1076
1077static void noinline
1078evpipe_init (EV_P)
1079{
1080 if (!ev_is_active (&pipe_w))
1081 {
1082#if EV_USE_EVENTFD
1083 if ((evfd = eventfd (0, 0)) >= 0)
1084 {
1085 evpipe [0] = -1;
1086 fd_intern (evfd);
1087 ev_io_set (&pipe_w, evfd, EV_READ);
1088 }
1089 else
1090#endif
1091 {
1092 while (pipe (evpipe))
1093 ev_syserr ("(libev) error creating signal/async pipe");
1094
1095 fd_intern (evpipe [0]);
1096 fd_intern (evpipe [1]);
1097 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1098 }
1099
1100 ev_io_start (EV_A_ &pipe_w);
1101 ev_unref (EV_A); /* watcher should not keep loop alive */
1102 }
1103}
1104
1105inline_size void
1106evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1107{
1108 if (!*flag)
1109 {
1110 int old_errno = errno; /* save errno because write might clobber it */
1111
1112 *flag = 1;
1113
1114#if EV_USE_EVENTFD
1115 if (evfd >= 0)
1116 {
1117 uint64_t counter = 1;
1118 write (evfd, &counter, sizeof (uint64_t));
1119 }
1120 else
1121#endif
1122 write (evpipe [1], &old_errno, 1);
1123
1124 errno = old_errno;
1125 }
1126}
1127
1128/* called whenever the libev signal pipe */
1129/* got some events (signal, async) */
343static void 1130static void
344signals_init (ANSIG *base, int count) 1131pipecb (EV_P_ ev_io *iow, int revents)
345{ 1132{
346 while (count--) 1133#if EV_USE_EVENTFD
1134 if (evfd >= 0)
1135 {
1136 uint64_t counter;
1137 read (evfd, &counter, sizeof (uint64_t));
347 { 1138 }
348 base->head = 0; 1139 else
1140#endif
1141 {
1142 char dummy;
1143 read (evpipe [0], &dummy, 1);
1144 }
1145
1146 if (gotsig && ev_is_default_loop (EV_A))
1147 {
1148 int signum;
349 base->gotsig = 0; 1149 gotsig = 0;
350 1150
351 ++base; 1151 for (signum = signalmax; signum--; )
1152 if (signals [signum].gotsig)
1153 ev_feed_signal_event (EV_A_ signum + 1);
1154 }
1155
1156#if EV_ASYNC_ENABLE
1157 if (gotasync)
352 } 1158 {
1159 int i;
1160 gotasync = 0;
1161
1162 for (i = asynccnt; i--; )
1163 if (asyncs [i]->sent)
1164 {
1165 asyncs [i]->sent = 0;
1166 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1167 }
1168 }
1169#endif
353} 1170}
1171
1172/*****************************************************************************/
354 1173
355static void 1174static void
356sighandler (int signum) 1175ev_sighandler (int signum)
357{ 1176{
1177#if EV_MULTIPLICITY
1178 struct ev_loop *loop = &default_loop_struct;
1179#endif
1180
1181#if _WIN32
1182 signal (signum, ev_sighandler);
1183#endif
1184
358 signals [signum - 1].gotsig = 1; 1185 signals [signum - 1].gotsig = 1;
359 1186 evpipe_write (EV_A_ &gotsig);
360 if (!gotsig)
361 {
362 gotsig = 1;
363 write (sigpipe [1], &signum, 1);
364 }
365} 1187}
366 1188
367static void 1189void noinline
368sigcb (struct ev_io *iow, int revents) 1190ev_feed_signal_event (EV_P_ int signum)
369{ 1191{
370 struct ev_signal *w; 1192 WL w;
371 int sig;
372 1193
373 read (sigpipe [0], &revents, 1); 1194#if EV_MULTIPLICITY
374 gotsig = 0; 1195 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1196#endif
375 1197
376 for (sig = signalmax; sig--; ) 1198 --signum;
377 if (signals [sig].gotsig) 1199
378 { 1200 if (signum < 0 || signum >= signalmax)
1201 return;
1202
379 signals [sig].gotsig = 0; 1203 signals [signum].gotsig = 0;
380 1204
381 for (w = signals [sig].head; w; w = w->next) 1205 for (w = signals [signum].head; w; w = w->next)
382 event ((W)w, EV_SIGNAL); 1206 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
383 }
384}
385
386static void
387siginit (void)
388{
389 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
390 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
391
392 /* rather than sort out wether we really need nb, set it */
393 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
394 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
395
396 ev_io_set (&sigev, sigpipe [0], EV_READ);
397 ev_io_start (&sigev);
398} 1207}
399 1208
400/*****************************************************************************/ 1209/*****************************************************************************/
401 1210
402static struct ev_idle **idles; 1211static WL childs [EV_PID_HASHSIZE];
403static int idlemax, idlecnt;
404 1212
405static struct ev_prepare **prepares; 1213#ifndef _WIN32
406static int preparemax, preparecnt;
407 1214
408static struct ev_check **checks;
409static int checkmax, checkcnt;
410
411/*****************************************************************************/
412
413static struct ev_child *childs [PID_HASHSIZE];
414static struct ev_signal childev; 1215static ev_signal childev;
1216
1217#ifndef WIFCONTINUED
1218# define WIFCONTINUED(status) 0
1219#endif
1220
1221/* handle a single child status event */
1222inline_speed void
1223child_reap (EV_P_ int chain, int pid, int status)
1224{
1225 ev_child *w;
1226 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1227
1228 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1229 {
1230 if ((w->pid == pid || !w->pid)
1231 && (!traced || (w->flags & 1)))
1232 {
1233 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1234 w->rpid = pid;
1235 w->rstatus = status;
1236 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1237 }
1238 }
1239}
415 1240
416#ifndef WCONTINUED 1241#ifndef WCONTINUED
417# define WCONTINUED 0 1242# define WCONTINUED 0
418#endif 1243#endif
419 1244
1245/* called on sigchld etc., calls waitpid */
420static void 1246static void
421childcb (struct ev_signal *sw, int revents) 1247childcb (EV_P_ ev_signal *sw, int revents)
422{ 1248{
423 struct ev_child *w;
424 int pid, status; 1249 int pid, status;
425 1250
1251 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
426 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1252 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
427 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1253 if (!WCONTINUED
428 if (w->pid == pid || w->pid == -1) 1254 || errno != EINVAL
429 { 1255 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
430 w->status = status; 1256 return;
431 event ((W)w, EV_CHILD); 1257
432 } 1258 /* make sure we are called again until all children have been reaped */
1259 /* we need to do it this way so that the callback gets called before we continue */
1260 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1261
1262 child_reap (EV_A_ pid, pid, status);
1263 if (EV_PID_HASHSIZE > 1)
1264 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
433} 1265}
1266
1267#endif
434 1268
435/*****************************************************************************/ 1269/*****************************************************************************/
436 1270
1271#if EV_USE_PORT
1272# include "ev_port.c"
1273#endif
1274#if EV_USE_KQUEUE
1275# include "ev_kqueue.c"
1276#endif
437#if EV_USE_EPOLL 1277#if EV_USE_EPOLL
438# include "ev_epoll.c" 1278# include "ev_epoll.c"
439#endif 1279#endif
1280#if EV_USE_POLL
1281# include "ev_poll.c"
1282#endif
440#if EV_USE_SELECT 1283#if EV_USE_SELECT
441# include "ev_select.c" 1284# include "ev_select.c"
442#endif 1285#endif
443 1286
444int 1287int
… …
451ev_version_minor (void) 1294ev_version_minor (void)
452{ 1295{
453 return EV_VERSION_MINOR; 1296 return EV_VERSION_MINOR;
454} 1297}
455 1298
456int ev_init (int flags) 1299/* return true if we are running with elevated privileges and should ignore env variables */
1300int inline_size
1301enable_secure (void)
457{ 1302{
458 if (!ev_method) 1303#ifdef _WIN32
1304 return 0;
1305#else
1306 return getuid () != geteuid ()
1307 || getgid () != getegid ();
1308#endif
1309}
1310
1311unsigned int
1312ev_supported_backends (void)
1313{
1314 unsigned int flags = 0;
1315
1316 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1317 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1318 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1319 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1320 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1321
1322 return flags;
1323}
1324
1325unsigned int
1326ev_recommended_backends (void)
1327{
1328 unsigned int flags = ev_supported_backends ();
1329
1330#ifndef __NetBSD__
1331 /* kqueue is borked on everything but netbsd apparently */
1332 /* it usually doesn't work correctly on anything but sockets and pipes */
1333 flags &= ~EVBACKEND_KQUEUE;
1334#endif
1335#ifdef __APPLE__
1336 /* only select works correctly on that "unix-certified" platform */
1337 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1338 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1339#endif
1340
1341 return flags;
1342}
1343
1344unsigned int
1345ev_embeddable_backends (void)
1346{
1347 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1348
1349 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1350 /* please fix it and tell me how to detect the fix */
1351 flags &= ~EVBACKEND_EPOLL;
1352
1353 return flags;
1354}
1355
1356unsigned int
1357ev_backend (EV_P)
1358{
1359 return backend;
1360}
1361
1362unsigned int
1363ev_loop_count (EV_P)
1364{
1365 return loop_count;
1366}
1367
1368unsigned int
1369ev_loop_depth (EV_P)
1370{
1371 return loop_depth;
1372}
1373
1374void
1375ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1376{
1377 io_blocktime = interval;
1378}
1379
1380void
1381ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1382{
1383 timeout_blocktime = interval;
1384}
1385
1386/* initialise a loop structure, must be zero-initialised */
1387static void noinline
1388loop_init (EV_P_ unsigned int flags)
1389{
1390 if (!backend)
459 { 1391 {
1392#if EV_USE_REALTIME
1393 if (!have_realtime)
1394 {
1395 struct timespec ts;
1396
1397 if (!clock_gettime (CLOCK_REALTIME, &ts))
1398 have_realtime = 1;
1399 }
1400#endif
1401
460#if EV_USE_MONOTONIC 1402#if EV_USE_MONOTONIC
1403 if (!have_monotonic)
1404 {
1405 struct timespec ts;
1406
1407 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1408 have_monotonic = 1;
1409 }
1410#endif
1411
1412 ev_rt_now = ev_time ();
1413 mn_now = get_clock ();
1414 now_floor = mn_now;
1415 rtmn_diff = ev_rt_now - mn_now;
1416 invoke_cb = ev_invoke_pending;
1417
1418 io_blocktime = 0.;
1419 timeout_blocktime = 0.;
1420 backend = 0;
1421 backend_fd = -1;
1422 gotasync = 0;
1423#if EV_USE_INOTIFY
1424 fs_fd = -2;
1425#endif
1426
1427 /* pid check not overridable via env */
1428#ifndef _WIN32
1429 if (flags & EVFLAG_FORKCHECK)
1430 curpid = getpid ();
1431#endif
1432
1433 if (!(flags & EVFLAG_NOENV)
1434 && !enable_secure ()
1435 && getenv ("LIBEV_FLAGS"))
1436 flags = atoi (getenv ("LIBEV_FLAGS"));
1437
1438 if (!(flags & 0x0000ffffU))
1439 flags |= ev_recommended_backends ();
1440
1441#if EV_USE_PORT
1442 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1443#endif
1444#if EV_USE_KQUEUE
1445 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1446#endif
1447#if EV_USE_EPOLL
1448 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1449#endif
1450#if EV_USE_POLL
1451 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1452#endif
1453#if EV_USE_SELECT
1454 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1455#endif
1456
1457 ev_prepare_init (&pending_w, pendingcb);
1458
1459 ev_init (&pipe_w, pipecb);
1460 ev_set_priority (&pipe_w, EV_MAXPRI);
1461 }
1462}
1463
1464/* free up a loop structure */
1465static void noinline
1466loop_destroy (EV_P)
1467{
1468 int i;
1469
1470 if (ev_is_active (&pipe_w))
1471 {
1472 ev_ref (EV_A); /* signal watcher */
1473 ev_io_stop (EV_A_ &pipe_w);
1474
1475#if EV_USE_EVENTFD
1476 if (evfd >= 0)
1477 close (evfd);
1478#endif
1479
1480 if (evpipe [0] >= 0)
1481 {
1482 close (evpipe [0]);
1483 close (evpipe [1]);
1484 }
1485 }
1486
1487#if EV_USE_INOTIFY
1488 if (fs_fd >= 0)
1489 close (fs_fd);
1490#endif
1491
1492 if (backend_fd >= 0)
1493 close (backend_fd);
1494
1495#if EV_USE_PORT
1496 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1497#endif
1498#if EV_USE_KQUEUE
1499 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1500#endif
1501#if EV_USE_EPOLL
1502 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1503#endif
1504#if EV_USE_POLL
1505 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1506#endif
1507#if EV_USE_SELECT
1508 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1509#endif
1510
1511 for (i = NUMPRI; i--; )
1512 {
1513 array_free (pending, [i]);
1514#if EV_IDLE_ENABLE
1515 array_free (idle, [i]);
1516#endif
1517 }
1518
1519 ev_free (anfds); anfdmax = 0;
1520
1521 /* have to use the microsoft-never-gets-it-right macro */
1522 array_free (rfeed, EMPTY);
1523 array_free (fdchange, EMPTY);
1524 array_free (timer, EMPTY);
1525#if EV_PERIODIC_ENABLE
1526 array_free (periodic, EMPTY);
1527#endif
1528#if EV_FORK_ENABLE
1529 array_free (fork, EMPTY);
1530#endif
1531 array_free (prepare, EMPTY);
1532 array_free (check, EMPTY);
1533#if EV_ASYNC_ENABLE
1534 array_free (async, EMPTY);
1535#endif
1536
1537 backend = 0;
1538}
1539
1540#if EV_USE_INOTIFY
1541inline_size void infy_fork (EV_P);
1542#endif
1543
1544inline_size void
1545loop_fork (EV_P)
1546{
1547#if EV_USE_PORT
1548 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1549#endif
1550#if EV_USE_KQUEUE
1551 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1552#endif
1553#if EV_USE_EPOLL
1554 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1555#endif
1556#if EV_USE_INOTIFY
1557 infy_fork (EV_A);
1558#endif
1559
1560 if (ev_is_active (&pipe_w))
1561 {
1562 /* this "locks" the handlers against writing to the pipe */
1563 /* while we modify the fd vars */
1564 gotsig = 1;
1565#if EV_ASYNC_ENABLE
1566 gotasync = 1;
1567#endif
1568
1569 ev_ref (EV_A);
1570 ev_io_stop (EV_A_ &pipe_w);
1571
1572#if EV_USE_EVENTFD
1573 if (evfd >= 0)
1574 close (evfd);
1575#endif
1576
1577 if (evpipe [0] >= 0)
1578 {
1579 close (evpipe [0]);
1580 close (evpipe [1]);
1581 }
1582
1583 evpipe_init (EV_A);
1584 /* now iterate over everything, in case we missed something */
1585 pipecb (EV_A_ &pipe_w, EV_READ);
1586 }
1587
1588 postfork = 0;
1589}
1590
1591#if EV_MULTIPLICITY
1592
1593struct ev_loop *
1594ev_loop_new (unsigned int flags)
1595{
1596 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1597
1598 memset (loop, 0, sizeof (struct ev_loop));
1599
1600 loop_init (EV_A_ flags);
1601
1602 if (ev_backend (EV_A))
1603 return loop;
1604
1605 return 0;
1606}
1607
1608void
1609ev_loop_destroy (EV_P)
1610{
1611 loop_destroy (EV_A);
1612 ev_free (loop);
1613}
1614
1615void
1616ev_loop_fork (EV_P)
1617{
1618 postfork = 1; /* must be in line with ev_default_fork */
1619}
1620
1621#if EV_VERIFY
1622static void noinline
1623verify_watcher (EV_P_ W w)
1624{
1625 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1626
1627 if (w->pending)
1628 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1629}
1630
1631static void noinline
1632verify_heap (EV_P_ ANHE *heap, int N)
1633{
1634 int i;
1635
1636 for (i = HEAP0; i < N + HEAP0; ++i)
1637 {
1638 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1639 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1640 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1641
1642 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1643 }
1644}
1645
1646static void noinline
1647array_verify (EV_P_ W *ws, int cnt)
1648{
1649 while (cnt--)
1650 {
1651 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1652 verify_watcher (EV_A_ ws [cnt]);
1653 }
1654}
1655#endif
1656
1657void
1658ev_loop_verify (EV_P)
1659{
1660#if EV_VERIFY
1661 int i;
1662 WL w;
1663
1664 assert (activecnt >= -1);
1665
1666 assert (fdchangemax >= fdchangecnt);
1667 for (i = 0; i < fdchangecnt; ++i)
1668 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1669
1670 assert (anfdmax >= 0);
1671 for (i = 0; i < anfdmax; ++i)
1672 for (w = anfds [i].head; w; w = w->next)
461 { 1673 {
462 struct timespec ts; 1674 verify_watcher (EV_A_ (W)w);
463 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1675 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
464 have_monotonic = 1; 1676 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
465 } 1677 }
1678
1679 assert (timermax >= timercnt);
1680 verify_heap (EV_A_ timers, timercnt);
1681
1682#if EV_PERIODIC_ENABLE
1683 assert (periodicmax >= periodiccnt);
1684 verify_heap (EV_A_ periodics, periodiccnt);
1685#endif
1686
1687 for (i = NUMPRI; i--; )
1688 {
1689 assert (pendingmax [i] >= pendingcnt [i]);
1690#if EV_IDLE_ENABLE
1691 assert (idleall >= 0);
1692 assert (idlemax [i] >= idlecnt [i]);
1693 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1694#endif
1695 }
1696
1697#if EV_FORK_ENABLE
1698 assert (forkmax >= forkcnt);
1699 array_verify (EV_A_ (W *)forks, forkcnt);
1700#endif
1701
1702#if EV_ASYNC_ENABLE
1703 assert (asyncmax >= asynccnt);
1704 array_verify (EV_A_ (W *)asyncs, asynccnt);
1705#endif
1706
1707 assert (preparemax >= preparecnt);
1708 array_verify (EV_A_ (W *)prepares, preparecnt);
1709
1710 assert (checkmax >= checkcnt);
1711 array_verify (EV_A_ (W *)checks, checkcnt);
1712
1713# if 0
1714 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1715 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
466#endif 1716# endif
467
468 ev_now = ev_time ();
469 now = get_clock ();
470 diff = ev_now - now;
471
472 if (pipe (sigpipe))
473 return 0;
474
475 ev_method = EVMETHOD_NONE;
476#if EV_USE_EPOLL
477 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
478#endif 1717#endif
479#if EV_USE_SELECT 1718}
480 if (ev_method == EVMETHOD_NONE) select_init (flags);
481#endif
482 1719
483 if (ev_method) 1720#endif /* multiplicity */
1721
1722#if EV_MULTIPLICITY
1723struct ev_loop *
1724ev_default_loop_init (unsigned int flags)
1725#else
1726int
1727ev_default_loop (unsigned int flags)
1728#endif
1729{
1730 if (!ev_default_loop_ptr)
1731 {
1732#if EV_MULTIPLICITY
1733 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1734#else
1735 ev_default_loop_ptr = 1;
1736#endif
1737
1738 loop_init (EV_A_ flags);
1739
1740 if (ev_backend (EV_A))
484 { 1741 {
485 ev_watcher_init (&sigev, sigcb); 1742#ifndef _WIN32
486 siginit ();
487
488 ev_signal_init (&childev, childcb, SIGCHLD); 1743 ev_signal_init (&childev, childcb, SIGCHLD);
1744 ev_set_priority (&childev, EV_MAXPRI);
489 ev_signal_start (&childev); 1745 ev_signal_start (EV_A_ &childev);
490 } 1746 ev_unref (EV_A); /* child watcher should not keep loop alive */
491 }
492
493 return ev_method;
494}
495
496/*****************************************************************************/
497
498void
499ev_fork_prepare (void)
500{
501 /* nop */
502}
503
504void
505ev_fork_parent (void)
506{
507 /* nop */
508}
509
510void
511ev_fork_child (void)
512{
513#if EV_USE_EPOLL
514 if (ev_method == EVMETHOD_EPOLL)
515 epoll_postfork_child ();
516#endif 1747#endif
517
518 ev_io_stop (&sigev);
519 close (sigpipe [0]);
520 close (sigpipe [1]);
521 pipe (sigpipe);
522 siginit ();
523}
524
525/*****************************************************************************/
526
527static void
528call_pending (void)
529{
530 while (pendingcnt)
531 {
532 ANPENDING *p = pendings + --pendingcnt;
533
534 if (p->w)
535 {
536 p->w->pending = 0;
537 p->w->cb (p->w, p->events);
538 }
539 }
540}
541
542static void
543timers_reify (void)
544{
545 while (timercnt && timers [0]->at <= now)
546 {
547 struct ev_timer *w = timers [0];
548
549 /* first reschedule or stop timer */
550 if (w->repeat)
551 {
552 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
553 w->at = now + w->repeat;
554 downheap ((WT *)timers, timercnt, 0);
555 } 1748 }
556 else 1749 else
557 ev_timer_stop (w); /* nonrepeating: stop timer */ 1750 ev_default_loop_ptr = 0;
558
559 event ((W)w, EV_TIMEOUT);
560 } 1751 }
561}
562 1752
563static void 1753 return ev_default_loop_ptr;
564periodics_reify (void) 1754}
1755
1756void
1757ev_default_destroy (void)
565{ 1758{
566 while (periodiccnt && periodics [0]->at <= ev_now) 1759#if EV_MULTIPLICITY
1760 struct ev_loop *loop = ev_default_loop_ptr;
1761#endif
1762
1763 ev_default_loop_ptr = 0;
1764
1765#ifndef _WIN32
1766 ev_ref (EV_A); /* child watcher */
1767 ev_signal_stop (EV_A_ &childev);
1768#endif
1769
1770 loop_destroy (EV_A);
1771}
1772
1773void
1774ev_default_fork (void)
1775{
1776#if EV_MULTIPLICITY
1777 struct ev_loop *loop = ev_default_loop_ptr;
1778#endif
1779
1780 postfork = 1; /* must be in line with ev_loop_fork */
1781}
1782
1783/*****************************************************************************/
1784
1785void
1786ev_invoke (EV_P_ void *w, int revents)
1787{
1788 EV_CB_INVOKE ((W)w, revents);
1789}
1790
1791void
1792ev_invoke_pending (EV_P)
1793{
1794 int pri;
1795
1796 for (pri = NUMPRI; pri--; )
1797 while (pendingcnt [pri])
567 { 1798 {
568 struct ev_periodic *w = periodics [0]; 1799 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
569 1800
570 /* first reschedule or stop timer */ 1801 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
571 if (w->interval) 1802 /* ^ this is no longer true, as pending_w could be here */
1803
1804 p->w->pending = 0;
1805 EV_CB_INVOKE (p->w, p->events);
1806 EV_FREQUENT_CHECK;
1807 }
1808}
1809
1810#if EV_IDLE_ENABLE
1811/* make idle watchers pending. this handles the "call-idle */
1812/* only when higher priorities are idle" logic */
1813inline_size void
1814idle_reify (EV_P)
1815{
1816 if (expect_false (idleall))
1817 {
1818 int pri;
1819
1820 for (pri = NUMPRI; pri--; )
572 { 1821 {
573 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1822 if (pendingcnt [pri])
574 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); 1823 break;
575 downheap ((WT *)periodics, periodiccnt, 0);
576 }
577 else
578 ev_periodic_stop (w); /* nonrepeating: stop timer */
579 1824
580 event ((W)w, EV_PERIODIC); 1825 if (idlecnt [pri])
581 }
582}
583
584static void
585periodics_reschedule (ev_tstamp diff)
586{
587 int i;
588
589 /* adjust periodics after time jump */
590 for (i = 0; i < periodiccnt; ++i)
591 {
592 struct ev_periodic *w = periodics [i];
593
594 if (w->interval)
595 {
596 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
597
598 if (fabs (diff) >= 1e-4)
599 { 1826 {
600 ev_periodic_stop (w); 1827 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
601 ev_periodic_start (w); 1828 break;
602
603 i = 0; /* restart loop, inefficient, but time jumps should be rare */
604 } 1829 }
605 } 1830 }
606 } 1831 }
607} 1832}
1833#endif
608 1834
609static void 1835/* make timers pending */
610time_update (void) 1836inline_size void
1837timers_reify (EV_P)
1838{
1839 EV_FREQUENT_CHECK;
1840
1841 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1842 {
1843 do
1844 {
1845 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1846
1847 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
1848
1849 /* first reschedule or stop timer */
1850 if (w->repeat)
1851 {
1852 ev_at (w) += w->repeat;
1853 if (ev_at (w) < mn_now)
1854 ev_at (w) = mn_now;
1855
1856 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1857
1858 ANHE_at_cache (timers [HEAP0]);
1859 downheap (timers, timercnt, HEAP0);
1860 }
1861 else
1862 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1863
1864 EV_FREQUENT_CHECK;
1865 feed_reverse (EV_A_ (W)w);
1866 }
1867 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1868
1869 feed_reverse_done (EV_A_ EV_TIMEOUT);
1870 }
1871}
1872
1873#if EV_PERIODIC_ENABLE
1874/* make periodics pending */
1875inline_size void
1876periodics_reify (EV_P)
1877{
1878 EV_FREQUENT_CHECK;
1879
1880 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1881 {
1882 int feed_count = 0;
1883
1884 do
1885 {
1886 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1887
1888 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1889
1890 /* first reschedule or stop timer */
1891 if (w->reschedule_cb)
1892 {
1893 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1894
1895 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1896
1897 ANHE_at_cache (periodics [HEAP0]);
1898 downheap (periodics, periodiccnt, HEAP0);
1899 }
1900 else if (w->interval)
1901 {
1902 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1903 /* if next trigger time is not sufficiently in the future, put it there */
1904 /* this might happen because of floating point inexactness */
1905 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1906 {
1907 ev_at (w) += w->interval;
1908
1909 /* if interval is unreasonably low we might still have a time in the past */
1910 /* so correct this. this will make the periodic very inexact, but the user */
1911 /* has effectively asked to get triggered more often than possible */
1912 if (ev_at (w) < ev_rt_now)
1913 ev_at (w) = ev_rt_now;
1914 }
1915
1916 ANHE_at_cache (periodics [HEAP0]);
1917 downheap (periodics, periodiccnt, HEAP0);
1918 }
1919 else
1920 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1921
1922 EV_FREQUENT_CHECK;
1923 feed_reverse (EV_A_ (W)w);
1924 }
1925 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1926
1927 feed_reverse_done (EV_A_ EV_PERIODIC);
1928 }
1929}
1930
1931/* simply recalculate all periodics */
1932/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1933static void noinline
1934periodics_reschedule (EV_P)
611{ 1935{
612 int i; 1936 int i;
613 1937
614 ev_now = ev_time (); 1938 /* adjust periodics after time jump */
1939 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1940 {
1941 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
615 1942
616 if (have_monotonic) 1943 if (w->reschedule_cb)
1944 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1945 else if (w->interval)
1946 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1947
1948 ANHE_at_cache (periodics [i]);
617 { 1949 }
1950
1951 reheap (periodics, periodiccnt);
1952}
1953#endif
1954
1955/* adjust all timers by a given offset */
1956static void noinline
1957timers_reschedule (EV_P_ ev_tstamp adjust)
1958{
1959 int i;
1960
1961 for (i = 0; i < timercnt; ++i)
1962 {
1963 ANHE *he = timers + i + HEAP0;
1964 ANHE_w (*he)->at += adjust;
1965 ANHE_at_cache (*he);
1966 }
1967}
1968
1969/* fetch new monotonic and realtime times from the kernel */
1970/* also detetc if there was a timejump, and act accordingly */
1971inline_speed void
1972time_update (EV_P_ ev_tstamp max_block)
1973{
1974#if EV_USE_MONOTONIC
1975 if (expect_true (have_monotonic))
1976 {
1977 int i;
618 ev_tstamp odiff = diff; 1978 ev_tstamp odiff = rtmn_diff;
619 1979
620 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1980 mn_now = get_clock ();
1981
1982 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1983 /* interpolate in the meantime */
1984 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
621 { 1985 {
622 now = get_clock (); 1986 ev_rt_now = rtmn_diff + mn_now;
1987 return;
1988 }
1989
1990 now_floor = mn_now;
1991 ev_rt_now = ev_time ();
1992
1993 /* loop a few times, before making important decisions.
1994 * on the choice of "4": one iteration isn't enough,
1995 * in case we get preempted during the calls to
1996 * ev_time and get_clock. a second call is almost guaranteed
1997 * to succeed in that case, though. and looping a few more times
1998 * doesn't hurt either as we only do this on time-jumps or
1999 * in the unlikely event of having been preempted here.
2000 */
2001 for (i = 4; --i; )
2002 {
623 diff = ev_now - now; 2003 rtmn_diff = ev_rt_now - mn_now;
624 2004
625 if (fabs (odiff - diff) < MIN_TIMEJUMP) 2005 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
626 return; /* all is well */ 2006 return; /* all is well */
627 2007
628 ev_now = ev_time (); 2008 ev_rt_now = ev_time ();
2009 mn_now = get_clock ();
2010 now_floor = mn_now;
629 } 2011 }
630 2012
631 periodics_reschedule (diff - odiff);
632 /* no timer adjustment, as the monotonic clock doesn't jump */ 2013 /* no timer adjustment, as the monotonic clock doesn't jump */
2014 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2015# if EV_PERIODIC_ENABLE
2016 periodics_reschedule (EV_A);
2017# endif
633 } 2018 }
634 else 2019 else
2020#endif
635 { 2021 {
636 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 2022 ev_rt_now = ev_time ();
2023
2024 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
637 { 2025 {
638 periodics_reschedule (ev_now - now);
639
640 /* adjust timers. this is easy, as the offset is the same for all */ 2026 /* adjust timers. this is easy, as the offset is the same for all of them */
641 for (i = 0; i < timercnt; ++i) 2027 timers_reschedule (EV_A_ ev_rt_now - mn_now);
642 timers [i]->at += diff; 2028#if EV_PERIODIC_ENABLE
2029 periodics_reschedule (EV_A);
2030#endif
643 } 2031 }
644 2032
645 now = ev_now; 2033 mn_now = ev_rt_now;
646 } 2034 }
647} 2035}
648 2036
649int ev_loop_done; 2037void
650
651void ev_loop (int flags) 2038ev_loop (EV_P_ int flags)
652{ 2039{
653 double block; 2040 ++loop_depth;
654 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 2041
2042 loop_done = EVUNLOOP_CANCEL;
2043
2044 invoke_cb (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
655 2045
656 do 2046 do
657 { 2047 {
2048#if EV_VERIFY >= 2
2049 ev_loop_verify (EV_A);
2050#endif
2051
2052#ifndef _WIN32
2053 if (expect_false (curpid)) /* penalise the forking check even more */
2054 if (expect_false (getpid () != curpid))
2055 {
2056 curpid = getpid ();
2057 postfork = 1;
2058 }
2059#endif
2060
2061#if EV_FORK_ENABLE
2062 /* we might have forked, so queue fork handlers */
2063 if (expect_false (postfork))
2064 if (forkcnt)
2065 {
2066 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2067 invoke_cb (EV_A);
2068 }
2069#endif
2070
658 /* queue check watchers (and execute them) */ 2071 /* queue prepare watchers (and execute them) */
659 if (preparecnt) 2072 if (expect_false (preparecnt))
660 { 2073 {
661 queue_events ((W *)prepares, preparecnt, EV_PREPARE); 2074 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
662 call_pending (); 2075 invoke_cb (EV_A);
663 } 2076 }
664 2077
2078 /* we might have forked, so reify kernel state if necessary */
2079 if (expect_false (postfork))
2080 loop_fork (EV_A);
2081
665 /* update fd-related kernel structures */ 2082 /* update fd-related kernel structures */
666 fd_reify (); 2083 fd_reify (EV_A);
667 2084
668 /* calculate blocking time */ 2085 /* calculate blocking time */
2086 {
2087 ev_tstamp waittime = 0.;
2088 ev_tstamp sleeptime = 0.;
669 2089
670 /* we only need this for !monotonic clockor timers, but as we basically 2090 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
671 always have timers, we just calculate it always */
672 ev_now = ev_time ();
673
674 if (flags & EVLOOP_NONBLOCK || idlecnt)
675 block = 0.;
676 else
677 { 2091 {
2092 /* remember old timestamp for io_blocktime calculation */
2093 ev_tstamp prev_mn_now = mn_now;
2094
2095 /* update time to cancel out callback processing overhead */
2096 time_update (EV_A_ 1e100);
2097
678 block = MAX_BLOCKTIME; 2098 waittime = MAX_BLOCKTIME;
679 2099
680 if (timercnt) 2100 if (timercnt)
681 { 2101 {
682 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 2102 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
683 if (block > to) block = to; 2103 if (waittime > to) waittime = to;
684 } 2104 }
685 2105
2106#if EV_PERIODIC_ENABLE
686 if (periodiccnt) 2107 if (periodiccnt)
687 { 2108 {
688 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 2109 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
689 if (block > to) block = to; 2110 if (waittime > to) waittime = to;
690 } 2111 }
2112#endif
691 2113
692 if (block < 0.) block = 0.; 2114 /* don't let timeouts decrease the waittime below timeout_blocktime */
2115 if (expect_false (waittime < timeout_blocktime))
2116 waittime = timeout_blocktime;
2117
2118 /* extra check because io_blocktime is commonly 0 */
2119 if (expect_false (io_blocktime))
2120 {
2121 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2122
2123 if (sleeptime > waittime - backend_fudge)
2124 sleeptime = waittime - backend_fudge;
2125
2126 if (expect_true (sleeptime > 0.))
2127 {
2128 ev_sleep (sleeptime);
2129 waittime -= sleeptime;
2130 }
2131 }
693 } 2132 }
694 2133
695 method_poll (block); 2134 ++loop_count;
2135 backend_poll (EV_A_ waittime);
696 2136
697 /* update ev_now, do magic */ 2137 /* update ev_rt_now, do magic */
698 time_update (); 2138 time_update (EV_A_ waittime + sleeptime);
2139 }
699 2140
700 /* queue pending timers and reschedule them */ 2141 /* queue pending timers and reschedule them */
701 timers_reify (); /* relative timers called last */ 2142 timers_reify (EV_A); /* relative timers called last */
2143#if EV_PERIODIC_ENABLE
702 periodics_reify (); /* absolute timers called first */ 2144 periodics_reify (EV_A); /* absolute timers called first */
2145#endif
703 2146
2147#if EV_IDLE_ENABLE
704 /* queue idle watchers unless io or timers are pending */ 2148 /* queue idle watchers unless other events are pending */
705 if (!pendingcnt) 2149 idle_reify (EV_A);
706 queue_events ((W *)idles, idlecnt, EV_IDLE); 2150#endif
707 2151
708 /* queue check watchers, to be executed first */ 2152 /* queue check watchers, to be executed first */
709 if (checkcnt) 2153 if (expect_false (checkcnt))
710 queue_events ((W *)checks, checkcnt, EV_CHECK); 2154 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
711 2155
712 call_pending (); 2156 invoke_cb (EV_A);
713 } 2157 }
714 while (!ev_loop_done); 2158 while (expect_true (
2159 activecnt
2160 && !loop_done
2161 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2162 ));
715 2163
716 if (ev_loop_done != 2) 2164 if (loop_done == EVUNLOOP_ONE)
2165 loop_done = EVUNLOOP_CANCEL;
2166
2167 --loop_depth;
2168}
2169
2170void
2171ev_unloop (EV_P_ int how)
2172{
717 ev_loop_done = 0; 2173 loop_done = how;
2174}
2175
2176void
2177ev_ref (EV_P)
2178{
2179 ++activecnt;
2180}
2181
2182void
2183ev_unref (EV_P)
2184{
2185 --activecnt;
2186}
2187
2188void
2189ev_now_update (EV_P)
2190{
2191 time_update (EV_A_ 1e100);
2192}
2193
2194void
2195ev_suspend (EV_P)
2196{
2197 ev_now_update (EV_A);
2198}
2199
2200void
2201ev_resume (EV_P)
2202{
2203 ev_tstamp mn_prev = mn_now;
2204
2205 ev_now_update (EV_A);
2206 timers_reschedule (EV_A_ mn_now - mn_prev);
2207#if EV_PERIODIC_ENABLE
2208 /* TODO: really do this? */
2209 periodics_reschedule (EV_A);
2210#endif
718} 2211}
719 2212
720/*****************************************************************************/ 2213/*****************************************************************************/
2214/* singly-linked list management, used when the expected list length is short */
721 2215
722static void 2216inline_size void
723wlist_add (WL *head, WL elem) 2217wlist_add (WL *head, WL elem)
724{ 2218{
725 elem->next = *head; 2219 elem->next = *head;
726 *head = elem; 2220 *head = elem;
727} 2221}
728 2222
729static void 2223inline_size void
730wlist_del (WL *head, WL elem) 2224wlist_del (WL *head, WL elem)
731{ 2225{
732 while (*head) 2226 while (*head)
733 { 2227 {
734 if (*head == elem) 2228 if (*head == elem)
… …
739 2233
740 head = &(*head)->next; 2234 head = &(*head)->next;
741 } 2235 }
742} 2236}
743 2237
744static void 2238/* internal, faster, version of ev_clear_pending */
2239inline_speed void
745ev_clear_pending (W w) 2240clear_pending (EV_P_ W w)
746{ 2241{
747 if (w->pending) 2242 if (w->pending)
748 { 2243 {
749 pendings [w->pending - 1].w = 0; 2244 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
750 w->pending = 0; 2245 w->pending = 0;
751 } 2246 }
752} 2247}
753 2248
754static void 2249int
2250ev_clear_pending (EV_P_ void *w)
2251{
2252 W w_ = (W)w;
2253 int pending = w_->pending;
2254
2255 if (expect_true (pending))
2256 {
2257 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2258 p->w = (W)&pending_w;
2259 w_->pending = 0;
2260 return p->events;
2261 }
2262 else
2263 return 0;
2264}
2265
2266inline_size void
2267pri_adjust (EV_P_ W w)
2268{
2269 int pri = ev_priority (w);
2270 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2271 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2272 ev_set_priority (w, pri);
2273}
2274
2275inline_speed void
755ev_start (W w, int active) 2276ev_start (EV_P_ W w, int active)
756{ 2277{
2278 pri_adjust (EV_A_ w);
757 w->active = active; 2279 w->active = active;
2280 ev_ref (EV_A);
758} 2281}
759 2282
760static void 2283inline_size void
761ev_stop (W w) 2284ev_stop (EV_P_ W w)
762{ 2285{
2286 ev_unref (EV_A);
763 w->active = 0; 2287 w->active = 0;
764} 2288}
765 2289
766/*****************************************************************************/ 2290/*****************************************************************************/
767 2291
768void 2292void noinline
769ev_io_start (struct ev_io *w) 2293ev_io_start (EV_P_ ev_io *w)
770{ 2294{
771 int fd = w->fd; 2295 int fd = w->fd;
772 2296
773 if (ev_is_active (w)) 2297 if (expect_false (ev_is_active (w)))
774 return; 2298 return;
775 2299
776 assert (("ev_io_start called with negative fd", fd >= 0)); 2300 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2301 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
777 2302
2303 EV_FREQUENT_CHECK;
2304
778 ev_start ((W)w, 1); 2305 ev_start (EV_A_ (W)w, 1);
779 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2306 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
780 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2307 wlist_add (&anfds[fd].head, (WL)w);
781 2308
782 fd_change (fd); 2309 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
783} 2310 w->events &= ~EV__IOFDSET;
784 2311
785void 2312 EV_FREQUENT_CHECK;
2313}
2314
2315void noinline
786ev_io_stop (struct ev_io *w) 2316ev_io_stop (EV_P_ ev_io *w)
787{ 2317{
788 ev_clear_pending ((W)w); 2318 clear_pending (EV_A_ (W)w);
789 if (!ev_is_active (w)) 2319 if (expect_false (!ev_is_active (w)))
790 return; 2320 return;
791 2321
2322 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2323
2324 EV_FREQUENT_CHECK;
2325
792 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2326 wlist_del (&anfds[w->fd].head, (WL)w);
793 ev_stop ((W)w); 2327 ev_stop (EV_A_ (W)w);
794 2328
795 fd_change (w->fd); 2329 fd_change (EV_A_ w->fd, 1);
796}
797 2330
798void 2331 EV_FREQUENT_CHECK;
2332}
2333
2334void noinline
799ev_timer_start (struct ev_timer *w) 2335ev_timer_start (EV_P_ ev_timer *w)
800{ 2336{
801 if (ev_is_active (w)) 2337 if (expect_false (ev_is_active (w)))
802 return; 2338 return;
803 2339
804 w->at += now; 2340 ev_at (w) += mn_now;
805 2341
806 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2342 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
807 2343
808 ev_start ((W)w, ++timercnt); 2344 EV_FREQUENT_CHECK;
809 array_needsize (timers, timermax, timercnt, );
810 timers [timercnt - 1] = w;
811 upheap ((WT *)timers, timercnt - 1);
812}
813 2345
814void 2346 ++timercnt;
2347 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2348 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2349 ANHE_w (timers [ev_active (w)]) = (WT)w;
2350 ANHE_at_cache (timers [ev_active (w)]);
2351 upheap (timers, ev_active (w));
2352
2353 EV_FREQUENT_CHECK;
2354
2355 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2356}
2357
2358void noinline
815ev_timer_stop (struct ev_timer *w) 2359ev_timer_stop (EV_P_ ev_timer *w)
816{ 2360{
817 ev_clear_pending ((W)w); 2361 clear_pending (EV_A_ (W)w);
818 if (!ev_is_active (w)) 2362 if (expect_false (!ev_is_active (w)))
819 return; 2363 return;
820 2364
821 if (w->active < timercnt--) 2365 EV_FREQUENT_CHECK;
2366
2367 {
2368 int active = ev_active (w);
2369
2370 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2371
2372 --timercnt;
2373
2374 if (expect_true (active < timercnt + HEAP0))
822 { 2375 {
823 timers [w->active - 1] = timers [timercnt]; 2376 timers [active] = timers [timercnt + HEAP0];
824 downheap ((WT *)timers, timercnt, w->active - 1); 2377 adjustheap (timers, timercnt, active);
825 } 2378 }
2379 }
826 2380
827 w->at = w->repeat; 2381 EV_FREQUENT_CHECK;
828 2382
2383 ev_at (w) -= mn_now;
2384
829 ev_stop ((W)w); 2385 ev_stop (EV_A_ (W)w);
830} 2386}
831 2387
832void 2388void noinline
833ev_timer_again (struct ev_timer *w) 2389ev_timer_again (EV_P_ ev_timer *w)
834{ 2390{
2391 EV_FREQUENT_CHECK;
2392
835 if (ev_is_active (w)) 2393 if (ev_is_active (w))
836 { 2394 {
837 if (w->repeat) 2395 if (w->repeat)
838 { 2396 {
839 w->at = now + w->repeat; 2397 ev_at (w) = mn_now + w->repeat;
2398 ANHE_at_cache (timers [ev_active (w)]);
840 downheap ((WT *)timers, timercnt, w->active - 1); 2399 adjustheap (timers, timercnt, ev_active (w));
841 } 2400 }
842 else 2401 else
843 ev_timer_stop (w); 2402 ev_timer_stop (EV_A_ w);
844 } 2403 }
845 else if (w->repeat) 2404 else if (w->repeat)
2405 {
2406 ev_at (w) = w->repeat;
846 ev_timer_start (w); 2407 ev_timer_start (EV_A_ w);
847} 2408 }
848 2409
849void 2410 EV_FREQUENT_CHECK;
2411}
2412
2413#if EV_PERIODIC_ENABLE
2414void noinline
850ev_periodic_start (struct ev_periodic *w) 2415ev_periodic_start (EV_P_ ev_periodic *w)
851{ 2416{
852 if (ev_is_active (w)) 2417 if (expect_false (ev_is_active (w)))
853 return; 2418 return;
854 2419
2420 if (w->reschedule_cb)
2421 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2422 else if (w->interval)
2423 {
855 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2424 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
856
857 /* this formula differs from the one in periodic_reify because we do not always round up */ 2425 /* this formula differs from the one in periodic_reify because we do not always round up */
858 if (w->interval)
859 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 2426 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2427 }
2428 else
2429 ev_at (w) = w->offset;
860 2430
2431 EV_FREQUENT_CHECK;
2432
2433 ++periodiccnt;
861 ev_start ((W)w, ++periodiccnt); 2434 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
862 array_needsize (periodics, periodicmax, periodiccnt, ); 2435 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
863 periodics [periodiccnt - 1] = w; 2436 ANHE_w (periodics [ev_active (w)]) = (WT)w;
864 upheap ((WT *)periodics, periodiccnt - 1); 2437 ANHE_at_cache (periodics [ev_active (w)]);
865} 2438 upheap (periodics, ev_active (w));
866 2439
867void 2440 EV_FREQUENT_CHECK;
2441
2442 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2443}
2444
2445void noinline
868ev_periodic_stop (struct ev_periodic *w) 2446ev_periodic_stop (EV_P_ ev_periodic *w)
869{ 2447{
870 ev_clear_pending ((W)w); 2448 clear_pending (EV_A_ (W)w);
871 if (!ev_is_active (w)) 2449 if (expect_false (!ev_is_active (w)))
872 return; 2450 return;
873 2451
874 if (w->active < periodiccnt--) 2452 EV_FREQUENT_CHECK;
2453
2454 {
2455 int active = ev_active (w);
2456
2457 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2458
2459 --periodiccnt;
2460
2461 if (expect_true (active < periodiccnt + HEAP0))
875 { 2462 {
876 periodics [w->active - 1] = periodics [periodiccnt]; 2463 periodics [active] = periodics [periodiccnt + HEAP0];
877 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2464 adjustheap (periodics, periodiccnt, active);
878 } 2465 }
2466 }
879 2467
2468 EV_FREQUENT_CHECK;
2469
880 ev_stop ((W)w); 2470 ev_stop (EV_A_ (W)w);
881} 2471}
882 2472
883void 2473void noinline
2474ev_periodic_again (EV_P_ ev_periodic *w)
2475{
2476 /* TODO: use adjustheap and recalculation */
2477 ev_periodic_stop (EV_A_ w);
2478 ev_periodic_start (EV_A_ w);
2479}
2480#endif
2481
2482#ifndef SA_RESTART
2483# define SA_RESTART 0
2484#endif
2485
2486void noinline
884ev_signal_start (struct ev_signal *w) 2487ev_signal_start (EV_P_ ev_signal *w)
885{ 2488{
2489#if EV_MULTIPLICITY
2490 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2491#endif
886 if (ev_is_active (w)) 2492 if (expect_false (ev_is_active (w)))
887 return; 2493 return;
888 2494
889 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2495 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
890 2496
2497 evpipe_init (EV_A);
2498
2499 EV_FREQUENT_CHECK;
2500
2501 {
2502#ifndef _WIN32
2503 sigset_t full, prev;
2504 sigfillset (&full);
2505 sigprocmask (SIG_SETMASK, &full, &prev);
2506#endif
2507
2508 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2509
2510#ifndef _WIN32
2511 sigprocmask (SIG_SETMASK, &prev, 0);
2512#endif
2513 }
2514
891 ev_start ((W)w, 1); 2515 ev_start (EV_A_ (W)w, 1);
892 array_needsize (signals, signalmax, w->signum, signals_init);
893 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2516 wlist_add (&signals [w->signum - 1].head, (WL)w);
894 2517
895 if (!w->next) 2518 if (!((WL)w)->next)
896 { 2519 {
2520#if _WIN32
2521 signal (w->signum, ev_sighandler);
2522#else
897 struct sigaction sa; 2523 struct sigaction sa;
898 sa.sa_handler = sighandler; 2524 sa.sa_handler = ev_sighandler;
899 sigfillset (&sa.sa_mask); 2525 sigfillset (&sa.sa_mask);
900 sa.sa_flags = 0; 2526 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
901 sigaction (w->signum, &sa, 0); 2527 sigaction (w->signum, &sa, 0);
2528#endif
902 } 2529 }
903}
904 2530
905void 2531 EV_FREQUENT_CHECK;
2532}
2533
2534void noinline
906ev_signal_stop (struct ev_signal *w) 2535ev_signal_stop (EV_P_ ev_signal *w)
907{ 2536{
908 ev_clear_pending ((W)w); 2537 clear_pending (EV_A_ (W)w);
909 if (!ev_is_active (w)) 2538 if (expect_false (!ev_is_active (w)))
910 return; 2539 return;
911 2540
2541 EV_FREQUENT_CHECK;
2542
912 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2543 wlist_del (&signals [w->signum - 1].head, (WL)w);
913 ev_stop ((W)w); 2544 ev_stop (EV_A_ (W)w);
914 2545
915 if (!signals [w->signum - 1].head) 2546 if (!signals [w->signum - 1].head)
916 signal (w->signum, SIG_DFL); 2547 signal (w->signum, SIG_DFL);
917}
918 2548
2549 EV_FREQUENT_CHECK;
2550}
2551
919void 2552void
920ev_idle_start (struct ev_idle *w) 2553ev_child_start (EV_P_ ev_child *w)
921{ 2554{
2555#if EV_MULTIPLICITY
2556 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2557#endif
922 if (ev_is_active (w)) 2558 if (expect_false (ev_is_active (w)))
923 return; 2559 return;
924 2560
925 ev_start ((W)w, ++idlecnt); 2561 EV_FREQUENT_CHECK;
926 array_needsize (idles, idlemax, idlecnt, );
927 idles [idlecnt - 1] = w;
928}
929 2562
2563 ev_start (EV_A_ (W)w, 1);
2564 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2565
2566 EV_FREQUENT_CHECK;
2567}
2568
930void 2569void
931ev_idle_stop (struct ev_idle *w) 2570ev_child_stop (EV_P_ ev_child *w)
932{ 2571{
933 ev_clear_pending ((W)w); 2572 clear_pending (EV_A_ (W)w);
934 if (ev_is_active (w)) 2573 if (expect_false (!ev_is_active (w)))
935 return; 2574 return;
936 2575
937 idles [w->active - 1] = idles [--idlecnt]; 2576 EV_FREQUENT_CHECK;
2577
2578 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
938 ev_stop ((W)w); 2579 ev_stop (EV_A_ (W)w);
939}
940 2580
941void 2581 EV_FREQUENT_CHECK;
942ev_prepare_start (struct ev_prepare *w) 2582}
2583
2584#if EV_STAT_ENABLE
2585
2586# ifdef _WIN32
2587# undef lstat
2588# define lstat(a,b) _stati64 (a,b)
2589# endif
2590
2591#define DEF_STAT_INTERVAL 5.0074891
2592#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2593#define MIN_STAT_INTERVAL 0.1074891
2594
2595static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2596
2597#if EV_USE_INOTIFY
2598# define EV_INOTIFY_BUFSIZE 8192
2599
2600static void noinline
2601infy_add (EV_P_ ev_stat *w)
943{ 2602{
944 if (ev_is_active (w)) 2603 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);
2604
2605 if (w->wd < 0)
2606 {
2607 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2608 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2609
2610 /* monitor some parent directory for speedup hints */
2611 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2612 /* but an efficiency issue only */
2613 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2614 {
2615 char path [4096];
2616 strcpy (path, w->path);
2617
2618 do
2619 {
2620 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2621 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2622
2623 char *pend = strrchr (path, '/');
2624
2625 if (!pend || pend == path)
2626 break;
2627
2628 *pend = 0;
2629 w->wd = inotify_add_watch (fs_fd, path, mask);
2630 }
2631 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2632 }
2633 }
2634
2635 if (w->wd >= 0)
2636 {
2637 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2638
2639 /* now local changes will be tracked by inotify, but remote changes won't */
2640 /* unless the filesystem it known to be local, we therefore still poll */
2641 /* also do poll on <2.6.25, but with normal frequency */
2642 struct statfs sfs;
2643
2644 if (fs_2625 && !statfs (w->path, &sfs))
2645 if (sfs.f_type == 0x1373 /* devfs */
2646 || sfs.f_type == 0xEF53 /* ext2/3 */
2647 || sfs.f_type == 0x3153464a /* jfs */
2648 || sfs.f_type == 0x52654973 /* reiser3 */
2649 || sfs.f_type == 0x01021994 /* tempfs */
2650 || sfs.f_type == 0x58465342 /* xfs */)
2651 return;
2652
2653 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2654 ev_timer_again (EV_A_ &w->timer);
2655 }
2656}
2657
2658static void noinline
2659infy_del (EV_P_ ev_stat *w)
2660{
2661 int slot;
2662 int wd = w->wd;
2663
2664 if (wd < 0)
945 return; 2665 return;
946 2666
2667 w->wd = -2;
2668 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2669 wlist_del (&fs_hash [slot].head, (WL)w);
2670
2671 /* remove this watcher, if others are watching it, they will rearm */
2672 inotify_rm_watch (fs_fd, wd);
2673}
2674
2675static void noinline
2676infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2677{
2678 if (slot < 0)
2679 /* overflow, need to check for all hash slots */
2680 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2681 infy_wd (EV_A_ slot, wd, ev);
2682 else
2683 {
2684 WL w_;
2685
2686 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2687 {
2688 ev_stat *w = (ev_stat *)w_;
2689 w_ = w_->next; /* lets us remove this watcher and all before it */
2690
2691 if (w->wd == wd || wd == -1)
2692 {
2693 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2694 {
2695 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2696 w->wd = -1;
2697 infy_add (EV_A_ w); /* re-add, no matter what */
2698 }
2699
2700 stat_timer_cb (EV_A_ &w->timer, 0);
2701 }
2702 }
2703 }
2704}
2705
2706static void
2707infy_cb (EV_P_ ev_io *w, int revents)
2708{
2709 char buf [EV_INOTIFY_BUFSIZE];
2710 struct inotify_event *ev = (struct inotify_event *)buf;
2711 int ofs;
2712 int len = read (fs_fd, buf, sizeof (buf));
2713
2714 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2715 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2716}
2717
2718inline_size void
2719check_2625 (EV_P)
2720{
2721 /* kernels < 2.6.25 are borked
2722 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2723 */
2724 struct utsname buf;
2725 int major, minor, micro;
2726
2727 if (uname (&buf))
2728 return;
2729
2730 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2731 return;
2732
2733 if (major < 2
2734 || (major == 2 && minor < 6)
2735 || (major == 2 && minor == 6 && micro < 25))
2736 return;
2737
2738 fs_2625 = 1;
2739}
2740
2741inline_size void
2742infy_init (EV_P)
2743{
2744 if (fs_fd != -2)
2745 return;
2746
2747 fs_fd = -1;
2748
2749 check_2625 (EV_A);
2750
2751 fs_fd = inotify_init ();
2752
2753 if (fs_fd >= 0)
2754 {
2755 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2756 ev_set_priority (&fs_w, EV_MAXPRI);
2757 ev_io_start (EV_A_ &fs_w);
2758 }
2759}
2760
2761inline_size void
2762infy_fork (EV_P)
2763{
2764 int slot;
2765
2766 if (fs_fd < 0)
2767 return;
2768
2769 close (fs_fd);
2770 fs_fd = inotify_init ();
2771
2772 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2773 {
2774 WL w_ = fs_hash [slot].head;
2775 fs_hash [slot].head = 0;
2776
2777 while (w_)
2778 {
2779 ev_stat *w = (ev_stat *)w_;
2780 w_ = w_->next; /* lets us add this watcher */
2781
2782 w->wd = -1;
2783
2784 if (fs_fd >= 0)
2785 infy_add (EV_A_ w); /* re-add, no matter what */
2786 else
2787 ev_timer_again (EV_A_ &w->timer);
2788 }
2789 }
2790}
2791
2792#endif
2793
2794#ifdef _WIN32
2795# define EV_LSTAT(p,b) _stati64 (p, b)
2796#else
2797# define EV_LSTAT(p,b) lstat (p, b)
2798#endif
2799
2800void
2801ev_stat_stat (EV_P_ ev_stat *w)
2802{
2803 if (lstat (w->path, &w->attr) < 0)
2804 w->attr.st_nlink = 0;
2805 else if (!w->attr.st_nlink)
2806 w->attr.st_nlink = 1;
2807}
2808
2809static void noinline
2810stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2811{
2812 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2813
2814 /* we copy this here each the time so that */
2815 /* prev has the old value when the callback gets invoked */
2816 w->prev = w->attr;
2817 ev_stat_stat (EV_A_ w);
2818
2819 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2820 if (
2821 w->prev.st_dev != w->attr.st_dev
2822 || w->prev.st_ino != w->attr.st_ino
2823 || w->prev.st_mode != w->attr.st_mode
2824 || w->prev.st_nlink != w->attr.st_nlink
2825 || w->prev.st_uid != w->attr.st_uid
2826 || w->prev.st_gid != w->attr.st_gid
2827 || w->prev.st_rdev != w->attr.st_rdev
2828 || w->prev.st_size != w->attr.st_size
2829 || w->prev.st_atime != w->attr.st_atime
2830 || w->prev.st_mtime != w->attr.st_mtime
2831 || w->prev.st_ctime != w->attr.st_ctime
2832 ) {
2833 #if EV_USE_INOTIFY
2834 if (fs_fd >= 0)
2835 {
2836 infy_del (EV_A_ w);
2837 infy_add (EV_A_ w);
2838 ev_stat_stat (EV_A_ w); /* avoid race... */
2839 }
2840 #endif
2841
2842 ev_feed_event (EV_A_ w, EV_STAT);
2843 }
2844}
2845
2846void
2847ev_stat_start (EV_P_ ev_stat *w)
2848{
2849 if (expect_false (ev_is_active (w)))
2850 return;
2851
2852 ev_stat_stat (EV_A_ w);
2853
2854 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2855 w->interval = MIN_STAT_INTERVAL;
2856
2857 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2858 ev_set_priority (&w->timer, ev_priority (w));
2859
2860#if EV_USE_INOTIFY
2861 infy_init (EV_A);
2862
2863 if (fs_fd >= 0)
2864 infy_add (EV_A_ w);
2865 else
2866#endif
2867 ev_timer_again (EV_A_ &w->timer);
2868
2869 ev_start (EV_A_ (W)w, 1);
2870
2871 EV_FREQUENT_CHECK;
2872}
2873
2874void
2875ev_stat_stop (EV_P_ ev_stat *w)
2876{
2877 clear_pending (EV_A_ (W)w);
2878 if (expect_false (!ev_is_active (w)))
2879 return;
2880
2881 EV_FREQUENT_CHECK;
2882
2883#if EV_USE_INOTIFY
2884 infy_del (EV_A_ w);
2885#endif
2886 ev_timer_stop (EV_A_ &w->timer);
2887
2888 ev_stop (EV_A_ (W)w);
2889
2890 EV_FREQUENT_CHECK;
2891}
2892#endif
2893
2894#if EV_IDLE_ENABLE
2895void
2896ev_idle_start (EV_P_ ev_idle *w)
2897{
2898 if (expect_false (ev_is_active (w)))
2899 return;
2900
2901 pri_adjust (EV_A_ (W)w);
2902
2903 EV_FREQUENT_CHECK;
2904
2905 {
2906 int active = ++idlecnt [ABSPRI (w)];
2907
2908 ++idleall;
2909 ev_start (EV_A_ (W)w, active);
2910
2911 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2912 idles [ABSPRI (w)][active - 1] = w;
2913 }
2914
2915 EV_FREQUENT_CHECK;
2916}
2917
2918void
2919ev_idle_stop (EV_P_ ev_idle *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 {
2928 int active = ev_active (w);
2929
2930 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2931 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2932
2933 ev_stop (EV_A_ (W)w);
2934 --idleall;
2935 }
2936
2937 EV_FREQUENT_CHECK;
2938}
2939#endif
2940
2941void
2942ev_prepare_start (EV_P_ ev_prepare *w)
2943{
2944 if (expect_false (ev_is_active (w)))
2945 return;
2946
2947 EV_FREQUENT_CHECK;
2948
947 ev_start ((W)w, ++preparecnt); 2949 ev_start (EV_A_ (W)w, ++preparecnt);
948 array_needsize (prepares, preparemax, preparecnt, ); 2950 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
949 prepares [preparecnt - 1] = w; 2951 prepares [preparecnt - 1] = w;
950}
951 2952
2953 EV_FREQUENT_CHECK;
2954}
2955
952void 2956void
953ev_prepare_stop (struct ev_prepare *w) 2957ev_prepare_stop (EV_P_ ev_prepare *w)
954{ 2958{
955 ev_clear_pending ((W)w); 2959 clear_pending (EV_A_ (W)w);
956 if (ev_is_active (w)) 2960 if (expect_false (!ev_is_active (w)))
957 return; 2961 return;
958 2962
2963 EV_FREQUENT_CHECK;
2964
2965 {
2966 int active = ev_active (w);
2967
959 prepares [w->active - 1] = prepares [--preparecnt]; 2968 prepares [active - 1] = prepares [--preparecnt];
2969 ev_active (prepares [active - 1]) = active;
2970 }
2971
960 ev_stop ((W)w); 2972 ev_stop (EV_A_ (W)w);
961}
962 2973
2974 EV_FREQUENT_CHECK;
2975}
2976
963void 2977void
964ev_check_start (struct ev_check *w) 2978ev_check_start (EV_P_ ev_check *w)
965{ 2979{
966 if (ev_is_active (w)) 2980 if (expect_false (ev_is_active (w)))
967 return; 2981 return;
968 2982
2983 EV_FREQUENT_CHECK;
2984
969 ev_start ((W)w, ++checkcnt); 2985 ev_start (EV_A_ (W)w, ++checkcnt);
970 array_needsize (checks, checkmax, checkcnt, ); 2986 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
971 checks [checkcnt - 1] = w; 2987 checks [checkcnt - 1] = w;
972}
973 2988
2989 EV_FREQUENT_CHECK;
2990}
2991
974void 2992void
975ev_check_stop (struct ev_check *w) 2993ev_check_stop (EV_P_ ev_check *w)
976{ 2994{
977 ev_clear_pending ((W)w); 2995 clear_pending (EV_A_ (W)w);
978 if (ev_is_active (w)) 2996 if (expect_false (!ev_is_active (w)))
979 return; 2997 return;
980 2998
2999 EV_FREQUENT_CHECK;
3000
3001 {
3002 int active = ev_active (w);
3003
981 checks [w->active - 1] = checks [--checkcnt]; 3004 checks [active - 1] = checks [--checkcnt];
3005 ev_active (checks [active - 1]) = active;
3006 }
3007
982 ev_stop ((W)w); 3008 ev_stop (EV_A_ (W)w);
983}
984 3009
985void 3010 EV_FREQUENT_CHECK;
986ev_child_start (struct ev_child *w) 3011}
3012
3013#if EV_EMBED_ENABLE
3014void noinline
3015ev_embed_sweep (EV_P_ ev_embed *w)
987{ 3016{
3017 ev_loop (w->other, EVLOOP_NONBLOCK);
3018}
3019
3020static void
3021embed_io_cb (EV_P_ ev_io *io, int revents)
3022{
3023 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3024
988 if (ev_is_active (w)) 3025 if (ev_cb (w))
3026 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3027 else
3028 ev_loop (w->other, EVLOOP_NONBLOCK);
3029}
3030
3031static void
3032embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3033{
3034 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3035
3036 {
3037 struct ev_loop *loop = w->other;
3038
3039 while (fdchangecnt)
3040 {
3041 fd_reify (EV_A);
3042 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3043 }
3044 }
3045}
3046
3047static void
3048embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3049{
3050 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3051
3052 ev_embed_stop (EV_A_ w);
3053
3054 {
3055 struct ev_loop *loop = w->other;
3056
3057 ev_loop_fork (EV_A);
3058 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3059 }
3060
3061 ev_embed_start (EV_A_ w);
3062}
3063
3064#if 0
3065static void
3066embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3067{
3068 ev_idle_stop (EV_A_ idle);
3069}
3070#endif
3071
3072void
3073ev_embed_start (EV_P_ ev_embed *w)
3074{
3075 if (expect_false (ev_is_active (w)))
989 return; 3076 return;
990 3077
3078 {
3079 struct ev_loop *loop = w->other;
3080 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3081 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3082 }
3083
3084 EV_FREQUENT_CHECK;
3085
3086 ev_set_priority (&w->io, ev_priority (w));
3087 ev_io_start (EV_A_ &w->io);
3088
3089 ev_prepare_init (&w->prepare, embed_prepare_cb);
3090 ev_set_priority (&w->prepare, EV_MINPRI);
3091 ev_prepare_start (EV_A_ &w->prepare);
3092
3093 ev_fork_init (&w->fork, embed_fork_cb);
3094 ev_fork_start (EV_A_ &w->fork);
3095
3096 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3097
991 ev_start ((W)w, 1); 3098 ev_start (EV_A_ (W)w, 1);
992 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
993}
994 3099
3100 EV_FREQUENT_CHECK;
3101}
3102
995void 3103void
996ev_child_stop (struct ev_child *w) 3104ev_embed_stop (EV_P_ ev_embed *w)
997{ 3105{
998 ev_clear_pending ((W)w); 3106 clear_pending (EV_A_ (W)w);
999 if (ev_is_active (w)) 3107 if (expect_false (!ev_is_active (w)))
1000 return; 3108 return;
1001 3109
1002 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 3110 EV_FREQUENT_CHECK;
3111
3112 ev_io_stop (EV_A_ &w->io);
3113 ev_prepare_stop (EV_A_ &w->prepare);
3114 ev_fork_stop (EV_A_ &w->fork);
3115
3116 EV_FREQUENT_CHECK;
3117}
3118#endif
3119
3120#if EV_FORK_ENABLE
3121void
3122ev_fork_start (EV_P_ ev_fork *w)
3123{
3124 if (expect_false (ev_is_active (w)))
3125 return;
3126
3127 EV_FREQUENT_CHECK;
3128
3129 ev_start (EV_A_ (W)w, ++forkcnt);
3130 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3131 forks [forkcnt - 1] = w;
3132
3133 EV_FREQUENT_CHECK;
3134}
3135
3136void
3137ev_fork_stop (EV_P_ ev_fork *w)
3138{
3139 clear_pending (EV_A_ (W)w);
3140 if (expect_false (!ev_is_active (w)))
3141 return;
3142
3143 EV_FREQUENT_CHECK;
3144
3145 {
3146 int active = ev_active (w);
3147
3148 forks [active - 1] = forks [--forkcnt];
3149 ev_active (forks [active - 1]) = active;
3150 }
3151
1003 ev_stop ((W)w); 3152 ev_stop (EV_A_ (W)w);
3153
3154 EV_FREQUENT_CHECK;
1004} 3155}
3156#endif
3157
3158#if EV_ASYNC_ENABLE
3159void
3160ev_async_start (EV_P_ ev_async *w)
3161{
3162 if (expect_false (ev_is_active (w)))
3163 return;
3164
3165 evpipe_init (EV_A);
3166
3167 EV_FREQUENT_CHECK;
3168
3169 ev_start (EV_A_ (W)w, ++asynccnt);
3170 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3171 asyncs [asynccnt - 1] = w;
3172
3173 EV_FREQUENT_CHECK;
3174}
3175
3176void
3177ev_async_stop (EV_P_ ev_async *w)
3178{
3179 clear_pending (EV_A_ (W)w);
3180 if (expect_false (!ev_is_active (w)))
3181 return;
3182
3183 EV_FREQUENT_CHECK;
3184
3185 {
3186 int active = ev_active (w);
3187
3188 asyncs [active - 1] = asyncs [--asynccnt];
3189 ev_active (asyncs [active - 1]) = active;
3190 }
3191
3192 ev_stop (EV_A_ (W)w);
3193
3194 EV_FREQUENT_CHECK;
3195}
3196
3197void
3198ev_async_send (EV_P_ ev_async *w)
3199{
3200 w->sent = 1;
3201 evpipe_write (EV_A_ &gotasync);
3202}
3203#endif
1005 3204
1006/*****************************************************************************/ 3205/*****************************************************************************/
1007 3206
1008struct ev_once 3207struct ev_once
1009{ 3208{
1010 struct ev_io io; 3209 ev_io io;
1011 struct ev_timer to; 3210 ev_timer to;
1012 void (*cb)(int revents, void *arg); 3211 void (*cb)(int revents, void *arg);
1013 void *arg; 3212 void *arg;
1014}; 3213};
1015 3214
1016static void 3215static void
1017once_cb (struct ev_once *once, int revents) 3216once_cb (EV_P_ struct ev_once *once, int revents)
1018{ 3217{
1019 void (*cb)(int revents, void *arg) = once->cb; 3218 void (*cb)(int revents, void *arg) = once->cb;
1020 void *arg = once->arg; 3219 void *arg = once->arg;
1021 3220
1022 ev_io_stop (&once->io); 3221 ev_io_stop (EV_A_ &once->io);
1023 ev_timer_stop (&once->to); 3222 ev_timer_stop (EV_A_ &once->to);
1024 free (once); 3223 ev_free (once);
1025 3224
1026 cb (revents, arg); 3225 cb (revents, arg);
1027} 3226}
1028 3227
1029static void 3228static void
1030once_cb_io (struct ev_io *w, int revents) 3229once_cb_io (EV_P_ ev_io *w, int revents)
1031{ 3230{
1032 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3231 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3232
3233 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1033} 3234}
1034 3235
1035static void 3236static void
1036once_cb_to (struct ev_timer *w, int revents) 3237once_cb_to (EV_P_ ev_timer *w, int revents)
1037{ 3238{
1038 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3239 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
1039}
1040 3240
3241 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3242}
3243
1041void 3244void
1042ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3245ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1043{ 3246{
1044 struct ev_once *once = malloc (sizeof (struct ev_once)); 3247 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1045 3248
1046 if (!once) 3249 if (expect_false (!once))
3250 {
1047 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3251 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1048 else 3252 return;
1049 { 3253 }
3254
1050 once->cb = cb; 3255 once->cb = cb;
1051 once->arg = arg; 3256 once->arg = arg;
1052 3257
1053 ev_watcher_init (&once->io, once_cb_io); 3258 ev_init (&once->io, once_cb_io);
1054 if (fd >= 0) 3259 if (fd >= 0)
3260 {
3261 ev_io_set (&once->io, fd, events);
3262 ev_io_start (EV_A_ &once->io);
3263 }
3264
3265 ev_init (&once->to, once_cb_to);
3266 if (timeout >= 0.)
3267 {
3268 ev_timer_set (&once->to, timeout, 0.);
3269 ev_timer_start (EV_A_ &once->to);
3270 }
3271}
3272
3273/*****************************************************************************/
3274
3275#if EV_WALK_ENABLE
3276void
3277ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3278{
3279 int i, j;
3280 ev_watcher_list *wl, *wn;
3281
3282 if (types & (EV_IO | EV_EMBED))
3283 for (i = 0; i < anfdmax; ++i)
3284 for (wl = anfds [i].head; wl; )
1055 { 3285 {
1056 ev_io_set (&once->io, fd, events); 3286 wn = wl->next;
1057 ev_io_start (&once->io); 3287
3288#if EV_EMBED_ENABLE
3289 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3290 {
3291 if (types & EV_EMBED)
3292 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3293 }
3294 else
3295#endif
3296#if EV_USE_INOTIFY
3297 if (ev_cb ((ev_io *)wl) == infy_cb)
3298 ;
3299 else
3300#endif
3301 if ((ev_io *)wl != &pipe_w)
3302 if (types & EV_IO)
3303 cb (EV_A_ EV_IO, wl);
3304
3305 wl = wn;
1058 } 3306 }
1059 3307
1060 ev_watcher_init (&once->to, once_cb_to); 3308 if (types & (EV_TIMER | EV_STAT))
1061 if (timeout >= 0.) 3309 for (i = timercnt + HEAP0; i-- > HEAP0; )
3310#if EV_STAT_ENABLE
3311 /*TODO: timer is not always active*/
3312 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1062 { 3313 {
1063 ev_timer_set (&once->to, timeout, 0.); 3314 if (types & EV_STAT)
1064 ev_timer_start (&once->to); 3315 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1065 } 3316 }
1066 } 3317 else
1067} 3318#endif
3319 if (types & EV_TIMER)
3320 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1068 3321
1069/*****************************************************************************/ 3322#if EV_PERIODIC_ENABLE
3323 if (types & EV_PERIODIC)
3324 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3325 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3326#endif
1070 3327
1071#if 0 3328#if EV_IDLE_ENABLE
3329 if (types & EV_IDLE)
3330 for (j = NUMPRI; i--; )
3331 for (i = idlecnt [j]; i--; )
3332 cb (EV_A_ EV_IDLE, idles [j][i]);
3333#endif
1072 3334
1073struct ev_io wio; 3335#if EV_FORK_ENABLE
3336 if (types & EV_FORK)
3337 for (i = forkcnt; i--; )
3338 if (ev_cb (forks [i]) != embed_fork_cb)
3339 cb (EV_A_ EV_FORK, forks [i]);
3340#endif
1074 3341
1075static void 3342#if EV_ASYNC_ENABLE
1076sin_cb (struct ev_io *w, int revents) 3343 if (types & EV_ASYNC)
1077{ 3344 for (i = asynccnt; i--; )
1078 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 3345 cb (EV_A_ EV_ASYNC, asyncs [i]);
1079} 3346#endif
1080 3347
1081static void 3348 if (types & EV_PREPARE)
1082ocb (struct ev_timer *w, int revents) 3349 for (i = preparecnt; i--; )
1083{ 3350#if EV_EMBED_ENABLE
1084 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 3351 if (ev_cb (prepares [i]) != embed_prepare_cb)
1085 ev_timer_stop (w); 3352#endif
1086 ev_timer_start (w); 3353 cb (EV_A_ EV_PREPARE, prepares [i]);
1087}
1088 3354
1089static void 3355 if (types & EV_CHECK)
1090scb (struct ev_signal *w, int revents) 3356 for (i = checkcnt; i--; )
1091{ 3357 cb (EV_A_ EV_CHECK, checks [i]);
1092 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1093 ev_io_stop (&wio);
1094 ev_io_start (&wio);
1095}
1096 3358
1097static void 3359 if (types & EV_SIGNAL)
1098gcb (struct ev_signal *w, int revents)
1099{
1100 fprintf (stderr, "generic %x\n", revents);
1101
1102}
1103
1104int main (void)
1105{
1106 ev_init (0);
1107
1108 ev_io_init (&wio, sin_cb, 0, EV_READ);
1109 ev_io_start (&wio);
1110
1111 struct ev_timer t[10000];
1112
1113#if 0
1114 int i;
1115 for (i = 0; i < 10000; ++i) 3360 for (i = 0; i < signalmax; ++i)
1116 { 3361 for (wl = signals [i].head; wl; )
1117 struct ev_timer *w = t + i; 3362 {
1118 ev_watcher_init (w, ocb, i); 3363 wn = wl->next;
1119 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533); 3364 cb (EV_A_ EV_SIGNAL, wl);
1120 ev_timer_start (w); 3365 wl = wn;
1121 if (drand48 () < 0.5) 3366 }
1122 ev_timer_stop (w);
1123 }
1124#endif
1125 3367
1126 struct ev_timer t1; 3368 if (types & EV_CHILD)
1127 ev_timer_init (&t1, ocb, 5, 10); 3369 for (i = EV_PID_HASHSIZE; i--; )
1128 ev_timer_start (&t1); 3370 for (wl = childs [i]; wl; )
1129 3371 {
1130 struct ev_signal sig; 3372 wn = wl->next;
1131 ev_signal_init (&sig, scb, SIGQUIT); 3373 cb (EV_A_ EV_CHILD, wl);
1132 ev_signal_start (&sig); 3374 wl = wn;
1133 3375 }
1134 struct ev_check cw; 3376/* EV_STAT 0x00001000 /* stat data changed */
1135 ev_check_init (&cw, gcb); 3377/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
1136 ev_check_start (&cw);
1137
1138 struct ev_idle iw;
1139 ev_idle_init (&iw, gcb);
1140 ev_idle_start (&iw);
1141
1142 ev_loop (0);
1143
1144 return 0;
1145} 3378}
1146
1147#endif 3379#endif
1148 3380
3381#if EV_MULTIPLICITY
3382 #include "ev_wrap.h"
3383#endif
1149 3384
3385#ifdef __cplusplus
3386}
3387#endif
1150 3388
1151

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