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Comparing libev/ev.c (file contents):
Revision 1.53 by root, Sat Nov 3 22:31:11 2007 UTC vs.
Revision 1.289 by root, Sat Jun 6 11:13:16 2009 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
31#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
32# include "config.h" 49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 0
57# endif
58# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1
60# endif
61# endif
62# endif
63
64# if HAVE_CLOCK_GETTIME
65# ifndef EV_USE_MONOTONIC
66# define EV_USE_MONOTONIC 1
67# endif
68# ifndef EV_USE_REALTIME
69# define EV_USE_REALTIME 0
70# endif
71# else
72# ifndef EV_USE_MONOTONIC
73# define EV_USE_MONOTONIC 0
74# endif
75# ifndef EV_USE_REALTIME
76# define EV_USE_REALTIME 0
77# endif
78# endif
79
80# ifndef EV_USE_NANOSLEEP
81# if HAVE_NANOSLEEP
82# define EV_USE_NANOSLEEP 1
83# else
84# define EV_USE_NANOSLEEP 0
85# endif
86# endif
87
88# ifndef EV_USE_SELECT
89# if HAVE_SELECT && HAVE_SYS_SELECT_H
90# define EV_USE_SELECT 1
91# else
92# define EV_USE_SELECT 0
93# endif
94# endif
95
96# ifndef EV_USE_POLL
97# if HAVE_POLL && HAVE_POLL_H
98# define EV_USE_POLL 1
99# else
100# define EV_USE_POLL 0
101# endif
102# endif
103
104# ifndef EV_USE_EPOLL
105# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
106# define EV_USE_EPOLL 1
107# else
108# define EV_USE_EPOLL 0
109# endif
110# endif
111
112# ifndef EV_USE_KQUEUE
113# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
114# define EV_USE_KQUEUE 1
115# else
116# define EV_USE_KQUEUE 0
117# endif
118# endif
119
120# ifndef EV_USE_PORT
121# if HAVE_PORT_H && HAVE_PORT_CREATE
122# define EV_USE_PORT 1
123# else
124# define EV_USE_PORT 0
125# endif
126# endif
127
128# ifndef EV_USE_INOTIFY
129# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
130# define EV_USE_INOTIFY 1
131# else
132# define EV_USE_INOTIFY 0
133# endif
134# endif
135
136# ifndef EV_USE_EVENTFD
137# if HAVE_EVENTFD
138# define EV_USE_EVENTFD 1
139# else
140# define EV_USE_EVENTFD 0
141# endif
142# endif
143
33#endif 144#endif
34 145
35#include <math.h> 146#include <math.h>
36#include <stdlib.h> 147#include <stdlib.h>
37#include <unistd.h>
38#include <fcntl.h> 148#include <fcntl.h>
39#include <signal.h>
40#include <stddef.h> 149#include <stddef.h>
41 150
42#include <stdio.h> 151#include <stdio.h>
43 152
44#include <assert.h> 153#include <assert.h>
45#include <errno.h> 154#include <errno.h>
46#include <sys/types.h> 155#include <sys/types.h>
156#include <time.h>
157
158#include <signal.h>
159
160#ifdef EV_H
161# include EV_H
162#else
163# include "ev.h"
164#endif
165
47#ifndef WIN32 166#ifndef _WIN32
167# include <sys/time.h>
48# include <sys/wait.h> 168# include <sys/wait.h>
169# include <unistd.h>
170#else
171# include <io.h>
172# define WIN32_LEAN_AND_MEAN
173# include <windows.h>
174# ifndef EV_SELECT_IS_WINSOCKET
175# define EV_SELECT_IS_WINSOCKET 1
49#endif 176# endif
50#include <sys/time.h> 177#endif
51#include <time.h>
52 178
53/**/ 179/* this block tries to deduce configuration from header-defined symbols and defaults */
180
181#ifndef EV_USE_CLOCK_SYSCALL
182# if __linux && __GLIBC__ >= 2
183# define EV_USE_CLOCK_SYSCALL 1
184# else
185# define EV_USE_CLOCK_SYSCALL 0
186# endif
187#endif
54 188
55#ifndef EV_USE_MONOTONIC 189#ifndef EV_USE_MONOTONIC
190# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
56# define EV_USE_MONOTONIC 1 191# define EV_USE_MONOTONIC 1
192# else
193# define EV_USE_MONOTONIC 0
194# endif
195#endif
196
197#ifndef EV_USE_REALTIME
198# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
199#endif
200
201#ifndef EV_USE_NANOSLEEP
202# if _POSIX_C_SOURCE >= 199309L
203# define EV_USE_NANOSLEEP 1
204# else
205# define EV_USE_NANOSLEEP 0
206# endif
57#endif 207#endif
58 208
59#ifndef EV_USE_SELECT 209#ifndef EV_USE_SELECT
60# define EV_USE_SELECT 1 210# define EV_USE_SELECT 1
61#endif 211#endif
62 212
63#ifndef EV_USEV_POLL 213#ifndef EV_USE_POLL
64# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */ 214# ifdef _WIN32
215# define EV_USE_POLL 0
216# else
217# define EV_USE_POLL 1
218# endif
65#endif 219#endif
66 220
67#ifndef EV_USE_EPOLL 221#ifndef EV_USE_EPOLL
222# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
223# define EV_USE_EPOLL 1
224# else
68# define EV_USE_EPOLL 0 225# define EV_USE_EPOLL 0
226# endif
69#endif 227#endif
70 228
71#ifndef EV_USE_KQUEUE 229#ifndef EV_USE_KQUEUE
72# define EV_USE_KQUEUE 0 230# define EV_USE_KQUEUE 0
73#endif 231#endif
74 232
75#ifndef EV_USE_REALTIME 233#ifndef EV_USE_PORT
234# define EV_USE_PORT 0
235#endif
236
237#ifndef EV_USE_INOTIFY
238# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
76# define EV_USE_REALTIME 1 239# define EV_USE_INOTIFY 1
240# else
241# define EV_USE_INOTIFY 0
77#endif 242# endif
243#endif
78 244
79/**/ 245#ifndef EV_PID_HASHSIZE
246# if EV_MINIMAL
247# define EV_PID_HASHSIZE 1
248# else
249# define EV_PID_HASHSIZE 16
250# endif
251#endif
252
253#ifndef EV_INOTIFY_HASHSIZE
254# if EV_MINIMAL
255# define EV_INOTIFY_HASHSIZE 1
256# else
257# define EV_INOTIFY_HASHSIZE 16
258# endif
259#endif
260
261#ifndef EV_USE_EVENTFD
262# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
263# define EV_USE_EVENTFD 1
264# else
265# define EV_USE_EVENTFD 0
266# endif
267#endif
268
269#if 0 /* debugging */
270# define EV_VERIFY 3
271# define EV_USE_4HEAP 1
272# define EV_HEAP_CACHE_AT 1
273#endif
274
275#ifndef EV_VERIFY
276# define EV_VERIFY !EV_MINIMAL
277#endif
278
279#ifndef EV_USE_4HEAP
280# define EV_USE_4HEAP !EV_MINIMAL
281#endif
282
283#ifndef EV_HEAP_CACHE_AT
284# define EV_HEAP_CACHE_AT !EV_MINIMAL
285#endif
286
287/* this block fixes any misconfiguration where we know we run into trouble otherwise */
80 288
81#ifndef CLOCK_MONOTONIC 289#ifndef CLOCK_MONOTONIC
82# undef EV_USE_MONOTONIC 290# undef EV_USE_MONOTONIC
83# define EV_USE_MONOTONIC 0 291# define EV_USE_MONOTONIC 0
84#endif 292#endif
… …
86#ifndef CLOCK_REALTIME 294#ifndef CLOCK_REALTIME
87# undef EV_USE_REALTIME 295# undef EV_USE_REALTIME
88# define EV_USE_REALTIME 0 296# define EV_USE_REALTIME 0
89#endif 297#endif
90 298
299#if !EV_STAT_ENABLE
300# undef EV_USE_INOTIFY
301# define EV_USE_INOTIFY 0
302#endif
303
304#if !EV_USE_NANOSLEEP
305# ifndef _WIN32
306# include <sys/select.h>
307# endif
308#endif
309
310#if EV_USE_INOTIFY
311# include <sys/utsname.h>
312# include <sys/statfs.h>
313# include <sys/inotify.h>
314/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
315# ifndef IN_DONT_FOLLOW
316# undef EV_USE_INOTIFY
317# define EV_USE_INOTIFY 0
318# endif
319#endif
320
321#if EV_SELECT_IS_WINSOCKET
322# include <winsock.h>
323#endif
324
325/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
326/* which makes programs even slower. might work on other unices, too. */
327#if EV_USE_CLOCK_SYSCALL
328# include <syscall.h>
329# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
330# undef EV_USE_MONOTONIC
331# define EV_USE_MONOTONIC 1
332#endif
333
334#if EV_USE_EVENTFD
335/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
336# include <stdint.h>
337# ifdef __cplusplus
338extern "C" {
339# endif
340int eventfd (unsigned int initval, int flags);
341# ifdef __cplusplus
342}
343# endif
344#endif
345
91/**/ 346/**/
92 347
348#if EV_VERIFY >= 3
349# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
350#else
351# define EV_FREQUENT_CHECK do { } while (0)
352#endif
353
354/*
355 * This is used to avoid floating point rounding problems.
356 * It is added to ev_rt_now when scheduling periodics
357 * to ensure progress, time-wise, even when rounding
358 * errors are against us.
359 * This value is good at least till the year 4000.
360 * Better solutions welcome.
361 */
362#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
363
93#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 364#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
94#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 365#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
95#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
96/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ 366/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
97 367
98#include "ev.h"
99
100#if __GNUC__ >= 3 368#if __GNUC__ >= 4
101# define expect(expr,value) __builtin_expect ((expr),(value)) 369# define expect(expr,value) __builtin_expect ((expr),(value))
102# define inline inline 370# define noinline __attribute__ ((noinline))
103#else 371#else
104# define expect(expr,value) (expr) 372# define expect(expr,value) (expr)
105# define inline static 373# define noinline
374# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
375# define inline
376# endif
106#endif 377#endif
107 378
108#define expect_false(expr) expect ((expr) != 0, 0) 379#define expect_false(expr) expect ((expr) != 0, 0)
109#define expect_true(expr) expect ((expr) != 0, 1) 380#define expect_true(expr) expect ((expr) != 0, 1)
381#define inline_size static inline
382
383#if EV_MINIMAL
384# define inline_speed static noinline
385#else
386# define inline_speed static inline
387#endif
110 388
111#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 389#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
112#define ABSPRI(w) ((w)->priority - EV_MINPRI) 390#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
113 391
392#define EMPTY /* required for microsofts broken pseudo-c compiler */
393#define EMPTY2(a,b) /* used to suppress some warnings */
394
114typedef struct ev_watcher *W; 395typedef ev_watcher *W;
115typedef struct ev_watcher_list *WL; 396typedef ev_watcher_list *WL;
116typedef struct ev_watcher_time *WT; 397typedef ev_watcher_time *WT;
398
399#define ev_active(w) ((W)(w))->active
400#define ev_at(w) ((WT)(w))->at
401
402#if EV_USE_REALTIME
403/* sig_atomic_t is used to avoid per-thread variables or locking but still */
404/* giving it a reasonably high chance of working on typical architetcures */
405static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
406#endif
407
408#if EV_USE_MONOTONIC
409static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
410#endif
411
412#ifdef _WIN32
413# include "ev_win32.c"
414#endif
117 415
118/*****************************************************************************/ 416/*****************************************************************************/
119 417
418static void (*syserr_cb)(const char *msg);
419
420void
421ev_set_syserr_cb (void (*cb)(const char *msg))
422{
423 syserr_cb = cb;
424}
425
426static void noinline
427ev_syserr (const char *msg)
428{
429 if (!msg)
430 msg = "(libev) system error";
431
432 if (syserr_cb)
433 syserr_cb (msg);
434 else
435 {
436 perror (msg);
437 abort ();
438 }
439}
440
441static void *
442ev_realloc_emul (void *ptr, long size)
443{
444 /* some systems, notably openbsd and darwin, fail to properly
445 * implement realloc (x, 0) (as required by both ansi c-98 and
446 * the single unix specification, so work around them here.
447 */
448
449 if (size)
450 return realloc (ptr, size);
451
452 free (ptr);
453 return 0;
454}
455
456static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
457
458void
459ev_set_allocator (void *(*cb)(void *ptr, long size))
460{
461 alloc = cb;
462}
463
464inline_speed void *
465ev_realloc (void *ptr, long size)
466{
467 ptr = alloc (ptr, size);
468
469 if (!ptr && size)
470 {
471 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
472 abort ();
473 }
474
475 return ptr;
476}
477
478#define ev_malloc(size) ev_realloc (0, (size))
479#define ev_free(ptr) ev_realloc ((ptr), 0)
480
481/*****************************************************************************/
482
483/* file descriptor info structure */
120typedef struct 484typedef struct
121{ 485{
122 struct ev_watcher_list *head; 486 WL head;
123 unsigned char events; 487 unsigned char events; /* the events watched for */
488 unsigned char reify; /* flag set when this ANFD needs reification */
489 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
124 unsigned char reify; 490 unsigned char unused;
491#if EV_USE_EPOLL
492 unsigned int egen; /* generation counter to counter epoll bugs */
493#endif
494#if EV_SELECT_IS_WINSOCKET
495 SOCKET handle;
496#endif
125} ANFD; 497} ANFD;
126 498
499/* stores the pending event set for a given watcher */
127typedef struct 500typedef struct
128{ 501{
129 W w; 502 W w;
130 int events; 503 int events; /* the pending event set for the given watcher */
131} ANPENDING; 504} ANPENDING;
132 505
133#ifdef EV_MULTIPLICITY 506#if EV_USE_INOTIFY
134struct ev_loop 507/* hash table entry per inotify-id */
508typedef struct
135{ 509{
136# define VAR(name,decl) decl 510 WL head;
137# include "ev_vars.h" 511} ANFS;
138}; 512#endif
513
514/* Heap Entry */
515#if EV_HEAP_CACHE_AT
516 /* a heap element */
517 typedef struct {
518 ev_tstamp at;
519 WT w;
520 } ANHE;
521
522 #define ANHE_w(he) (he).w /* access watcher, read-write */
523 #define ANHE_at(he) (he).at /* access cached at, read-only */
524 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
139#else 525#else
526 /* a heap element */
527 typedef WT ANHE;
528
529 #define ANHE_w(he) (he)
530 #define ANHE_at(he) (he)->at
531 #define ANHE_at_cache(he)
532#endif
533
534#if EV_MULTIPLICITY
535
536 struct ev_loop
537 {
538 ev_tstamp ev_rt_now;
539 #define ev_rt_now ((loop)->ev_rt_now)
540 #define VAR(name,decl) decl;
541 #include "ev_vars.h"
542 #undef VAR
543 };
544 #include "ev_wrap.h"
545
546 static struct ev_loop default_loop_struct;
547 struct ev_loop *ev_default_loop_ptr;
548
549#else
550
551 ev_tstamp ev_rt_now;
140# define VAR(name,decl) static decl 552 #define VAR(name,decl) static decl;
141# include "ev_vars.h" 553 #include "ev_vars.h"
142#endif
143#undef VAR 554 #undef VAR
555
556 static int ev_default_loop_ptr;
557
558#endif
144 559
145/*****************************************************************************/ 560/*****************************************************************************/
146 561
147inline ev_tstamp 562ev_tstamp
148ev_time (void) 563ev_time (void)
149{ 564{
150#if EV_USE_REALTIME 565#if EV_USE_REALTIME
566 if (expect_true (have_realtime))
567 {
151 struct timespec ts; 568 struct timespec ts;
152 clock_gettime (CLOCK_REALTIME, &ts); 569 clock_gettime (CLOCK_REALTIME, &ts);
153 return ts.tv_sec + ts.tv_nsec * 1e-9; 570 return ts.tv_sec + ts.tv_nsec * 1e-9;
154#else 571 }
572#endif
573
155 struct timeval tv; 574 struct timeval tv;
156 gettimeofday (&tv, 0); 575 gettimeofday (&tv, 0);
157 return tv.tv_sec + tv.tv_usec * 1e-6; 576 return tv.tv_sec + tv.tv_usec * 1e-6;
158#endif
159} 577}
160 578
161inline ev_tstamp 579inline_size ev_tstamp
162get_clock (void) 580get_clock (void)
163{ 581{
164#if EV_USE_MONOTONIC 582#if EV_USE_MONOTONIC
165 if (expect_true (have_monotonic)) 583 if (expect_true (have_monotonic))
166 { 584 {
… …
171#endif 589#endif
172 590
173 return ev_time (); 591 return ev_time ();
174} 592}
175 593
594#if EV_MULTIPLICITY
176ev_tstamp 595ev_tstamp
177ev_now (EV_P) 596ev_now (EV_P)
178{ 597{
179 return rt_now; 598 return ev_rt_now;
180} 599}
600#endif
181 601
182#define array_roundsize(base,n) ((n) | 4 & ~3) 602void
183 603ev_sleep (ev_tstamp delay)
184#define array_needsize(base,cur,cnt,init) \ 604{
185 if (expect_false ((cnt) > cur)) \ 605 if (delay > 0.)
186 { \
187 int newcnt = cur; \
188 do \
189 { \
190 newcnt = array_roundsize (base, newcnt << 1); \
191 } \
192 while ((cnt) > newcnt); \
193 \
194 base = realloc (base, sizeof (*base) * (newcnt)); \
195 init (base + cur, newcnt - cur); \
196 cur = newcnt; \
197 } 606 {
607#if EV_USE_NANOSLEEP
608 struct timespec ts;
609
610 ts.tv_sec = (time_t)delay;
611 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
612
613 nanosleep (&ts, 0);
614#elif defined(_WIN32)
615 Sleep ((unsigned long)(delay * 1e3));
616#else
617 struct timeval tv;
618
619 tv.tv_sec = (time_t)delay;
620 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
621
622 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
623 /* somehting nto guaranteed by newer posix versions, but guaranteed */
624 /* by older ones */
625 select (0, 0, 0, 0, &tv);
626#endif
627 }
628}
198 629
199/*****************************************************************************/ 630/*****************************************************************************/
200 631
201static void 632#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
202anfds_init (ANFD *base, int count)
203{
204 while (count--)
205 {
206 base->head = 0;
207 base->events = EV_NONE;
208 base->reify = 0;
209 633
210 ++base; 634/* find a suitable new size for the given array, */
635/* hopefully by rounding to a ncie-to-malloc size */
636inline_size int
637array_nextsize (int elem, int cur, int cnt)
638{
639 int ncur = cur + 1;
640
641 do
642 ncur <<= 1;
643 while (cnt > ncur);
644
645 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
646 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
211 } 647 {
212} 648 ncur *= elem;
213 649 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
214static void 650 ncur = ncur - sizeof (void *) * 4;
215event (EV_P_ W w, int events) 651 ncur /= elem;
216{
217 if (w->pending)
218 { 652 }
653
654 return ncur;
655}
656
657static noinline void *
658array_realloc (int elem, void *base, int *cur, int cnt)
659{
660 *cur = array_nextsize (elem, *cur, cnt);
661 return ev_realloc (base, elem * *cur);
662}
663
664#define array_init_zero(base,count) \
665 memset ((void *)(base), 0, sizeof (*(base)) * (count))
666
667#define array_needsize(type,base,cur,cnt,init) \
668 if (expect_false ((cnt) > (cur))) \
669 { \
670 int ocur_ = (cur); \
671 (base) = (type *)array_realloc \
672 (sizeof (type), (base), &(cur), (cnt)); \
673 init ((base) + (ocur_), (cur) - ocur_); \
674 }
675
676#if 0
677#define array_slim(type,stem) \
678 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
679 { \
680 stem ## max = array_roundsize (stem ## cnt >> 1); \
681 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
682 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
683 }
684#endif
685
686#define array_free(stem, idx) \
687 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
688
689/*****************************************************************************/
690
691/* dummy callback for pending events */
692static void noinline
693pendingcb (EV_P_ ev_prepare *w, int revents)
694{
695}
696
697void noinline
698ev_feed_event (EV_P_ void *w, int revents)
699{
700 W w_ = (W)w;
701 int pri = ABSPRI (w_);
702
703 if (expect_false (w_->pending))
704 pendings [pri][w_->pending - 1].events |= revents;
705 else
706 {
707 w_->pending = ++pendingcnt [pri];
708 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
709 pendings [pri][w_->pending - 1].w = w_;
219 pendings [ABSPRI (w)][w->pending - 1].events |= events; 710 pendings [pri][w_->pending - 1].events = revents;
220 return;
221 } 711 }
222
223 w->pending = ++pendingcnt [ABSPRI (w)];
224 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
225 pendings [ABSPRI (w)][w->pending - 1].w = w;
226 pendings [ABSPRI (w)][w->pending - 1].events = events;
227} 712}
228 713
229static void 714inline_speed void
715feed_reverse (EV_P_ W w)
716{
717 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
718 rfeeds [rfeedcnt++] = w;
719}
720
721inline_size void
722feed_reverse_done (EV_P_ int revents)
723{
724 do
725 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
726 while (rfeedcnt);
727}
728
729inline_speed void
230queue_events (EV_P_ W *events, int eventcnt, int type) 730queue_events (EV_P_ W *events, int eventcnt, int type)
231{ 731{
232 int i; 732 int i;
233 733
234 for (i = 0; i < eventcnt; ++i) 734 for (i = 0; i < eventcnt; ++i)
235 event (EV_A_ events [i], type); 735 ev_feed_event (EV_A_ events [i], type);
236} 736}
237 737
238static void 738/*****************************************************************************/
739
740inline_speed void
239fd_event (EV_P_ int fd, int events) 741fd_event (EV_P_ int fd, int revents)
240{ 742{
241 ANFD *anfd = anfds + fd; 743 ANFD *anfd = anfds + fd;
242 struct ev_io *w; 744 ev_io *w;
243 745
244 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 746 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
245 { 747 {
246 int ev = w->events & events; 748 int ev = w->events & revents;
247 749
248 if (ev) 750 if (ev)
249 event (EV_A_ (W)w, ev); 751 ev_feed_event (EV_A_ (W)w, ev);
250 } 752 }
251} 753}
252 754
253/*****************************************************************************/ 755void
756ev_feed_fd_event (EV_P_ int fd, int revents)
757{
758 if (fd >= 0 && fd < anfdmax)
759 fd_event (EV_A_ fd, revents);
760}
254 761
255static void 762/* make sure the external fd watch events are in-sync */
763/* with the kernel/libev internal state */
764inline_size void
256fd_reify (EV_P) 765fd_reify (EV_P)
257{ 766{
258 int i; 767 int i;
259 768
260 for (i = 0; i < fdchangecnt; ++i) 769 for (i = 0; i < fdchangecnt; ++i)
261 { 770 {
262 int fd = fdchanges [i]; 771 int fd = fdchanges [i];
263 ANFD *anfd = anfds + fd; 772 ANFD *anfd = anfds + fd;
264 struct ev_io *w; 773 ev_io *w;
265 774
266 int events = 0; 775 unsigned char events = 0;
267 776
268 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 777 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
269 events |= w->events; 778 events |= (unsigned char)w->events;
270 779
271 anfd->reify = 0; 780#if EV_SELECT_IS_WINSOCKET
272 781 if (events)
273 if (anfd->events != events)
274 { 782 {
275 method_modify (EV_A_ fd, anfd->events, events); 783 unsigned long arg;
276 anfd->events = events; 784 #ifdef EV_FD_TO_WIN32_HANDLE
785 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
786 #else
787 anfd->handle = _get_osfhandle (fd);
788 #endif
789 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
277 } 790 }
791#endif
792
793 {
794 unsigned char o_events = anfd->events;
795 unsigned char o_reify = anfd->reify;
796
797 anfd->reify = 0;
798 anfd->events = events;
799
800 if (o_events != events || o_reify & EV__IOFDSET)
801 backend_modify (EV_A_ fd, o_events, events);
802 }
278 } 803 }
279 804
280 fdchangecnt = 0; 805 fdchangecnt = 0;
281} 806}
282 807
283static void 808/* something about the given fd changed */
809inline_size void
284fd_change (EV_P_ int fd) 810fd_change (EV_P_ int fd, int flags)
285{ 811{
286 if (anfds [fd].reify || fdchangecnt < 0) 812 unsigned char reify = anfds [fd].reify;
287 return;
288
289 anfds [fd].reify = 1; 813 anfds [fd].reify |= flags;
290 814
815 if (expect_true (!reify))
816 {
291 ++fdchangecnt; 817 ++fdchangecnt;
292 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 818 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
293 fdchanges [fdchangecnt - 1] = fd; 819 fdchanges [fdchangecnt - 1] = fd;
820 }
294} 821}
295 822
296static void 823/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
824inline_speed void
297fd_kill (EV_P_ int fd) 825fd_kill (EV_P_ int fd)
298{ 826{
299 struct ev_io *w; 827 ev_io *w;
300 828
301 while ((w = (struct ev_io *)anfds [fd].head)) 829 while ((w = (ev_io *)anfds [fd].head))
302 { 830 {
303 ev_io_stop (EV_A_ w); 831 ev_io_stop (EV_A_ w);
304 event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 832 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
305 } 833 }
834}
835
836/* check whether the given fd is atcually valid, for error recovery */
837inline_size int
838fd_valid (int fd)
839{
840#ifdef _WIN32
841 return _get_osfhandle (fd) != -1;
842#else
843 return fcntl (fd, F_GETFD) != -1;
844#endif
306} 845}
307 846
308/* called on EBADF to verify fds */ 847/* called on EBADF to verify fds */
309static void 848static void noinline
310fd_ebadf (EV_P) 849fd_ebadf (EV_P)
311{ 850{
312 int fd; 851 int fd;
313 852
314 for (fd = 0; fd < anfdmax; ++fd) 853 for (fd = 0; fd < anfdmax; ++fd)
315 if (anfds [fd].events) 854 if (anfds [fd].events)
316 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 855 if (!fd_valid (fd) && errno == EBADF)
317 fd_kill (EV_A_ fd); 856 fd_kill (EV_A_ fd);
318} 857}
319 858
320/* called on ENOMEM in select/poll to kill some fds and retry */ 859/* called on ENOMEM in select/poll to kill some fds and retry */
321static void 860static void noinline
322fd_enomem (EV_P) 861fd_enomem (EV_P)
323{ 862{
324 int fd = anfdmax; 863 int fd;
325 864
326 while (fd--) 865 for (fd = anfdmax; fd--; )
327 if (anfds [fd].events) 866 if (anfds [fd].events)
328 { 867 {
329 close (fd);
330 fd_kill (EV_A_ fd); 868 fd_kill (EV_A_ fd);
331 return; 869 return;
332 } 870 }
333} 871}
334 872
873/* usually called after fork if backend needs to re-arm all fds from scratch */
874static void noinline
875fd_rearm_all (EV_P)
876{
877 int fd;
878
879 for (fd = 0; fd < anfdmax; ++fd)
880 if (anfds [fd].events)
881 {
882 anfds [fd].events = 0;
883 anfds [fd].emask = 0;
884 fd_change (EV_A_ fd, EV__IOFDSET | 1);
885 }
886}
887
335/*****************************************************************************/ 888/*****************************************************************************/
336 889
337static void 890/*
338upheap (WT *timers, int k) 891 * the heap functions want a real array index. array index 0 uis guaranteed to not
339{ 892 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
340 WT w = timers [k]; 893 * the branching factor of the d-tree.
894 */
341 895
342 while (k && timers [k >> 1]->at > w->at) 896/*
343 { 897 * at the moment we allow libev the luxury of two heaps,
344 timers [k] = timers [k >> 1]; 898 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
345 timers [k]->active = k + 1; 899 * which is more cache-efficient.
346 k >>= 1; 900 * the difference is about 5% with 50000+ watchers.
347 } 901 */
902#if EV_USE_4HEAP
348 903
349 timers [k] = w; 904#define DHEAP 4
350 timers [k]->active = k + 1; 905#define HEAP0 (DHEAP - 1) /* index of first element in heap */
906#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
907#define UPHEAP_DONE(p,k) ((p) == (k))
351 908
352} 909/* away from the root */
353 910inline_speed void
354static void
355downheap (WT *timers, int N, int k) 911downheap (ANHE *heap, int N, int k)
356{ 912{
357 WT w = timers [k]; 913 ANHE he = heap [k];
914 ANHE *E = heap + N + HEAP0;
358 915
359 while (k < (N >> 1)) 916 for (;;)
360 { 917 {
361 int j = k << 1; 918 ev_tstamp minat;
919 ANHE *minpos;
920 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
362 921
363 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 922 /* find minimum child */
923 if (expect_true (pos + DHEAP - 1 < E))
364 ++j; 924 {
365 925 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
366 if (w->at <= timers [j]->at) 926 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
927 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
928 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
929 }
930 else if (pos < E)
931 {
932 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
933 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
934 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
935 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
936 }
937 else
367 break; 938 break;
368 939
369 timers [k] = timers [j]; 940 if (ANHE_at (he) <= minat)
370 timers [k]->active = k + 1; 941 break;
942
943 heap [k] = *minpos;
944 ev_active (ANHE_w (*minpos)) = k;
945
946 k = minpos - heap;
947 }
948
949 heap [k] = he;
950 ev_active (ANHE_w (he)) = k;
951}
952
953#else /* 4HEAP */
954
955#define HEAP0 1
956#define HPARENT(k) ((k) >> 1)
957#define UPHEAP_DONE(p,k) (!(p))
958
959/* away from the root */
960inline_speed void
961downheap (ANHE *heap, int N, int k)
962{
963 ANHE he = heap [k];
964
965 for (;;)
966 {
967 int c = k << 1;
968
969 if (c > N + HEAP0 - 1)
970 break;
971
972 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
973 ? 1 : 0;
974
975 if (ANHE_at (he) <= ANHE_at (heap [c]))
976 break;
977
978 heap [k] = heap [c];
979 ev_active (ANHE_w (heap [k])) = k;
980
371 k = j; 981 k = c;
982 }
983
984 heap [k] = he;
985 ev_active (ANHE_w (he)) = k;
986}
987#endif
988
989/* towards the root */
990inline_speed void
991upheap (ANHE *heap, int k)
992{
993 ANHE he = heap [k];
994
995 for (;;)
372 } 996 {
997 int p = HPARENT (k);
373 998
374 timers [k] = w; 999 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
375 timers [k]->active = k + 1; 1000 break;
1001
1002 heap [k] = heap [p];
1003 ev_active (ANHE_w (heap [k])) = k;
1004 k = p;
1005 }
1006
1007 heap [k] = he;
1008 ev_active (ANHE_w (he)) = k;
1009}
1010
1011/* move an element suitably so it is in a correct place */
1012inline_size void
1013adjustheap (ANHE *heap, int N, int k)
1014{
1015 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
1016 upheap (heap, k);
1017 else
1018 downheap (heap, N, k);
1019}
1020
1021/* rebuild the heap: this function is used only once and executed rarely */
1022inline_size void
1023reheap (ANHE *heap, int N)
1024{
1025 int i;
1026
1027 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1028 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1029 for (i = 0; i < N; ++i)
1030 upheap (heap, i + HEAP0);
376} 1031}
377 1032
378/*****************************************************************************/ 1033/*****************************************************************************/
379 1034
1035/* associate signal watchers to a signal signal */
380typedef struct 1036typedef struct
381{ 1037{
382 struct ev_watcher_list *head; 1038 WL head;
383 sig_atomic_t volatile gotsig; 1039 EV_ATOMIC_T gotsig;
384} ANSIG; 1040} ANSIG;
385 1041
386static ANSIG *signals; 1042static ANSIG *signals;
387static int signalmax; 1043static int signalmax;
388 1044
389static int sigpipe [2]; 1045static EV_ATOMIC_T gotsig;
390static sig_atomic_t volatile gotsig;
391 1046
1047/*****************************************************************************/
1048
1049/* used to prepare libev internal fd's */
1050/* this is not fork-safe */
1051inline_speed void
1052fd_intern (int fd)
1053{
1054#ifdef _WIN32
1055 unsigned long arg = 1;
1056 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
1057#else
1058 fcntl (fd, F_SETFD, FD_CLOEXEC);
1059 fcntl (fd, F_SETFL, O_NONBLOCK);
1060#endif
1061}
1062
1063static void noinline
1064evpipe_init (EV_P)
1065{
1066 if (!ev_is_active (&pipe_w))
1067 {
1068#if EV_USE_EVENTFD
1069 if ((evfd = eventfd (0, 0)) >= 0)
1070 {
1071 evpipe [0] = -1;
1072 fd_intern (evfd);
1073 ev_io_set (&pipe_w, evfd, EV_READ);
1074 }
1075 else
1076#endif
1077 {
1078 while (pipe (evpipe))
1079 ev_syserr ("(libev) error creating signal/async pipe");
1080
1081 fd_intern (evpipe [0]);
1082 fd_intern (evpipe [1]);
1083 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1084 }
1085
1086 ev_io_start (EV_A_ &pipe_w);
1087 ev_unref (EV_A); /* watcher should not keep loop alive */
1088 }
1089}
1090
1091inline_size void
1092evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1093{
1094 if (!*flag)
1095 {
1096 int old_errno = errno; /* save errno because write might clobber it */
1097
1098 *flag = 1;
1099
1100#if EV_USE_EVENTFD
1101 if (evfd >= 0)
1102 {
1103 uint64_t counter = 1;
1104 write (evfd, &counter, sizeof (uint64_t));
1105 }
1106 else
1107#endif
1108 write (evpipe [1], &old_errno, 1);
1109
1110 errno = old_errno;
1111 }
1112}
1113
1114/* called whenever the libev signal pipe */
1115/* got some events (signal, async) */
392static void 1116static void
393signals_init (ANSIG *base, int count) 1117pipecb (EV_P_ ev_io *iow, int revents)
394{ 1118{
395 while (count--) 1119#if EV_USE_EVENTFD
1120 if (evfd >= 0)
1121 {
1122 uint64_t counter;
1123 read (evfd, &counter, sizeof (uint64_t));
396 { 1124 }
397 base->head = 0; 1125 else
1126#endif
1127 {
1128 char dummy;
1129 read (evpipe [0], &dummy, 1);
1130 }
1131
1132 if (gotsig && ev_is_default_loop (EV_A))
1133 {
1134 int signum;
398 base->gotsig = 0; 1135 gotsig = 0;
399 1136
400 ++base; 1137 for (signum = signalmax; signum--; )
1138 if (signals [signum].gotsig)
1139 ev_feed_signal_event (EV_A_ signum + 1);
1140 }
1141
1142#if EV_ASYNC_ENABLE
1143 if (gotasync)
401 } 1144 {
1145 int i;
1146 gotasync = 0;
1147
1148 for (i = asynccnt; i--; )
1149 if (asyncs [i]->sent)
1150 {
1151 asyncs [i]->sent = 0;
1152 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1153 }
1154 }
1155#endif
402} 1156}
1157
1158/*****************************************************************************/
403 1159
404static void 1160static void
405sighandler (int signum) 1161ev_sighandler (int signum)
406{ 1162{
1163#if EV_MULTIPLICITY
1164 struct ev_loop *loop = &default_loop_struct;
1165#endif
1166
1167#if _WIN32
1168 signal (signum, ev_sighandler);
1169#endif
1170
407 signals [signum - 1].gotsig = 1; 1171 signals [signum - 1].gotsig = 1;
408 1172 evpipe_write (EV_A_ &gotsig);
409 if (!gotsig)
410 {
411 int old_errno = errno;
412 gotsig = 1;
413 write (sigpipe [1], &signum, 1);
414 errno = old_errno;
415 }
416} 1173}
417 1174
418static void 1175void noinline
419sigcb (EV_P_ struct ev_io *iow, int revents) 1176ev_feed_signal_event (EV_P_ int signum)
420{ 1177{
421 struct ev_watcher_list *w; 1178 WL w;
1179
1180#if EV_MULTIPLICITY
1181 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1182#endif
1183
422 int signum; 1184 --signum;
423 1185
424 read (sigpipe [0], &revents, 1); 1186 if (signum < 0 || signum >= signalmax)
425 gotsig = 0; 1187 return;
426 1188
427 for (signum = signalmax; signum--; )
428 if (signals [signum].gotsig)
429 {
430 signals [signum].gotsig = 0; 1189 signals [signum].gotsig = 0;
431 1190
432 for (w = signals [signum].head; w; w = w->next) 1191 for (w = signals [signum].head; w; w = w->next)
433 event (EV_A_ (W)w, EV_SIGNAL); 1192 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
434 }
435}
436
437static void
438siginit (EV_P)
439{
440#ifndef WIN32
441 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
442 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
443
444 /* rather than sort out wether we really need nb, set it */
445 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
446 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
447#endif
448
449 ev_io_set (&sigev, sigpipe [0], EV_READ);
450 ev_io_start (&sigev);
451 ev_unref (EV_A); /* child watcher should not keep loop alive */
452} 1193}
453 1194
454/*****************************************************************************/ 1195/*****************************************************************************/
455 1196
1197static WL childs [EV_PID_HASHSIZE];
1198
456#ifndef WIN32 1199#ifndef _WIN32
1200
1201static ev_signal childev;
1202
1203#ifndef WIFCONTINUED
1204# define WIFCONTINUED(status) 0
1205#endif
1206
1207/* handle a single child status event */
1208inline_speed void
1209child_reap (EV_P_ int chain, int pid, int status)
1210{
1211 ev_child *w;
1212 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1213
1214 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1215 {
1216 if ((w->pid == pid || !w->pid)
1217 && (!traced || (w->flags & 1)))
1218 {
1219 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1220 w->rpid = pid;
1221 w->rstatus = status;
1222 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1223 }
1224 }
1225}
457 1226
458#ifndef WCONTINUED 1227#ifndef WCONTINUED
459# define WCONTINUED 0 1228# define WCONTINUED 0
460#endif 1229#endif
461 1230
1231/* called on sigchld etc., calls waitpid */
462static void 1232static void
463child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
464{
465 struct ev_child *w;
466
467 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
468 if (w->pid == pid || !w->pid)
469 {
470 w->priority = sw->priority; /* need to do it *now* */
471 w->rpid = pid;
472 w->rstatus = status;
473 event (EV_A_ (W)w, EV_CHILD);
474 }
475}
476
477static void
478childcb (EV_P_ struct ev_signal *sw, int revents) 1233childcb (EV_P_ ev_signal *sw, int revents)
479{ 1234{
480 int pid, status; 1235 int pid, status;
481 1236
1237 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
482 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1238 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
483 { 1239 if (!WCONTINUED
1240 || errno != EINVAL
1241 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1242 return;
1243
484 /* make sure we are called again until all childs have been reaped */ 1244 /* make sure we are called again until all children have been reaped */
1245 /* we need to do it this way so that the callback gets called before we continue */
485 event (EV_A_ (W)sw, EV_SIGNAL); 1246 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
486 1247
487 child_reap (EV_A_ sw, pid, pid, status); 1248 child_reap (EV_A_ pid, pid, status);
1249 if (EV_PID_HASHSIZE > 1)
488 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1250 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
489 }
490} 1251}
491 1252
492#endif 1253#endif
493 1254
494/*****************************************************************************/ 1255/*****************************************************************************/
495 1256
1257#if EV_USE_PORT
1258# include "ev_port.c"
1259#endif
496#if EV_USE_KQUEUE 1260#if EV_USE_KQUEUE
497# include "ev_kqueue.c" 1261# include "ev_kqueue.c"
498#endif 1262#endif
499#if EV_USE_EPOLL 1263#if EV_USE_EPOLL
500# include "ev_epoll.c" 1264# include "ev_epoll.c"
501#endif 1265#endif
502#if EV_USEV_POLL 1266#if EV_USE_POLL
503# include "ev_poll.c" 1267# include "ev_poll.c"
504#endif 1268#endif
505#if EV_USE_SELECT 1269#if EV_USE_SELECT
506# include "ev_select.c" 1270# include "ev_select.c"
507#endif 1271#endif
… …
517{ 1281{
518 return EV_VERSION_MINOR; 1282 return EV_VERSION_MINOR;
519} 1283}
520 1284
521/* return true if we are running with elevated privileges and should ignore env variables */ 1285/* return true if we are running with elevated privileges and should ignore env variables */
522static int 1286int inline_size
523enable_secure (void) 1287enable_secure (void)
524{ 1288{
525#ifdef WIN32 1289#ifdef _WIN32
526 return 0; 1290 return 0;
527#else 1291#else
528 return getuid () != geteuid () 1292 return getuid () != geteuid ()
529 || getgid () != getegid (); 1293 || getgid () != getegid ();
530#endif 1294#endif
531} 1295}
532 1296
1297unsigned int
1298ev_supported_backends (void)
1299{
1300 unsigned int flags = 0;
1301
1302 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1303 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1304 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1305 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1306 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1307
1308 return flags;
1309}
1310
1311unsigned int
1312ev_recommended_backends (void)
1313{
1314 unsigned int flags = ev_supported_backends ();
1315
1316#ifndef __NetBSD__
1317 /* kqueue is borked on everything but netbsd apparently */
1318 /* it usually doesn't work correctly on anything but sockets and pipes */
1319 flags &= ~EVBACKEND_KQUEUE;
1320#endif
1321#ifdef __APPLE__
1322 /* only select works correctly on that "unix-certified" platform */
1323 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1324 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1325#endif
1326
1327 return flags;
1328}
1329
1330unsigned int
1331ev_embeddable_backends (void)
1332{
1333 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1334
1335 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1336 /* please fix it and tell me how to detect the fix */
1337 flags &= ~EVBACKEND_EPOLL;
1338
1339 return flags;
1340}
1341
1342unsigned int
1343ev_backend (EV_P)
1344{
1345 return backend;
1346}
1347
1348unsigned int
1349ev_loop_count (EV_P)
1350{
1351 return loop_count;
1352}
1353
1354void
1355ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1356{
1357 io_blocktime = interval;
1358}
1359
1360void
1361ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1362{
1363 timeout_blocktime = interval;
1364}
1365
1366/* initialise a loop structure, must be zero-initialised */
1367static void noinline
1368loop_init (EV_P_ unsigned int flags)
1369{
1370 if (!backend)
1371 {
1372#if EV_USE_REALTIME
1373 if (!have_realtime)
1374 {
1375 struct timespec ts;
1376
1377 if (!clock_gettime (CLOCK_REALTIME, &ts))
1378 have_realtime = 1;
1379 }
1380#endif
1381
1382#if EV_USE_MONOTONIC
1383 if (!have_monotonic)
1384 {
1385 struct timespec ts;
1386
1387 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1388 have_monotonic = 1;
1389 }
1390#endif
1391
1392 ev_rt_now = ev_time ();
1393 mn_now = get_clock ();
1394 now_floor = mn_now;
1395 rtmn_diff = ev_rt_now - mn_now;
1396
1397 io_blocktime = 0.;
1398 timeout_blocktime = 0.;
1399 backend = 0;
1400 backend_fd = -1;
1401 gotasync = 0;
1402#if EV_USE_INOTIFY
1403 fs_fd = -2;
1404#endif
1405
1406 /* pid check not overridable via env */
1407#ifndef _WIN32
1408 if (flags & EVFLAG_FORKCHECK)
1409 curpid = getpid ();
1410#endif
1411
1412 if (!(flags & EVFLAG_NOENV)
1413 && !enable_secure ()
1414 && getenv ("LIBEV_FLAGS"))
1415 flags = atoi (getenv ("LIBEV_FLAGS"));
1416
1417 if (!(flags & 0x0000ffffU))
1418 flags |= ev_recommended_backends ();
1419
1420#if EV_USE_PORT
1421 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1422#endif
1423#if EV_USE_KQUEUE
1424 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1425#endif
1426#if EV_USE_EPOLL
1427 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1428#endif
1429#if EV_USE_POLL
1430 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1431#endif
1432#if EV_USE_SELECT
1433 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1434#endif
1435
1436 ev_prepare_init (&pending_w, pendingcb);
1437
1438 ev_init (&pipe_w, pipecb);
1439 ev_set_priority (&pipe_w, EV_MAXPRI);
1440 }
1441}
1442
1443/* free up a loop structure */
1444static void noinline
1445loop_destroy (EV_P)
1446{
1447 int i;
1448
1449 if (ev_is_active (&pipe_w))
1450 {
1451 ev_ref (EV_A); /* signal watcher */
1452 ev_io_stop (EV_A_ &pipe_w);
1453
1454#if EV_USE_EVENTFD
1455 if (evfd >= 0)
1456 close (evfd);
1457#endif
1458
1459 if (evpipe [0] >= 0)
1460 {
1461 close (evpipe [0]);
1462 close (evpipe [1]);
1463 }
1464 }
1465
1466#if EV_USE_INOTIFY
1467 if (fs_fd >= 0)
1468 close (fs_fd);
1469#endif
1470
1471 if (backend_fd >= 0)
1472 close (backend_fd);
1473
1474#if EV_USE_PORT
1475 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1476#endif
1477#if EV_USE_KQUEUE
1478 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1479#endif
1480#if EV_USE_EPOLL
1481 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1482#endif
1483#if EV_USE_POLL
1484 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1485#endif
1486#if EV_USE_SELECT
1487 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1488#endif
1489
1490 for (i = NUMPRI; i--; )
1491 {
1492 array_free (pending, [i]);
1493#if EV_IDLE_ENABLE
1494 array_free (idle, [i]);
1495#endif
1496 }
1497
1498 ev_free (anfds); anfdmax = 0;
1499
1500 /* have to use the microsoft-never-gets-it-right macro */
1501 array_free (rfeed, EMPTY);
1502 array_free (fdchange, EMPTY);
1503 array_free (timer, EMPTY);
1504#if EV_PERIODIC_ENABLE
1505 array_free (periodic, EMPTY);
1506#endif
1507#if EV_FORK_ENABLE
1508 array_free (fork, EMPTY);
1509#endif
1510 array_free (prepare, EMPTY);
1511 array_free (check, EMPTY);
1512#if EV_ASYNC_ENABLE
1513 array_free (async, EMPTY);
1514#endif
1515
1516 backend = 0;
1517}
1518
1519#if EV_USE_INOTIFY
1520inline_size void infy_fork (EV_P);
1521#endif
1522
1523inline_size void
1524loop_fork (EV_P)
1525{
1526#if EV_USE_PORT
1527 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1528#endif
1529#if EV_USE_KQUEUE
1530 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1531#endif
1532#if EV_USE_EPOLL
1533 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1534#endif
1535#if EV_USE_INOTIFY
1536 infy_fork (EV_A);
1537#endif
1538
1539 if (ev_is_active (&pipe_w))
1540 {
1541 /* this "locks" the handlers against writing to the pipe */
1542 /* while we modify the fd vars */
1543 gotsig = 1;
1544#if EV_ASYNC_ENABLE
1545 gotasync = 1;
1546#endif
1547
1548 ev_ref (EV_A);
1549 ev_io_stop (EV_A_ &pipe_w);
1550
1551#if EV_USE_EVENTFD
1552 if (evfd >= 0)
1553 close (evfd);
1554#endif
1555
1556 if (evpipe [0] >= 0)
1557 {
1558 close (evpipe [0]);
1559 close (evpipe [1]);
1560 }
1561
1562 evpipe_init (EV_A);
1563 /* now iterate over everything, in case we missed something */
1564 pipecb (EV_A_ &pipe_w, EV_READ);
1565 }
1566
1567 postfork = 0;
1568}
1569
1570#if EV_MULTIPLICITY
1571
1572struct ev_loop *
1573ev_loop_new (unsigned int flags)
1574{
1575 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1576
1577 memset (loop, 0, sizeof (struct ev_loop));
1578
1579 loop_init (EV_A_ flags);
1580
1581 if (ev_backend (EV_A))
1582 return loop;
1583
1584 return 0;
1585}
1586
1587void
1588ev_loop_destroy (EV_P)
1589{
1590 loop_destroy (EV_A);
1591 ev_free (loop);
1592}
1593
1594void
1595ev_loop_fork (EV_P)
1596{
1597 postfork = 1; /* must be in line with ev_default_fork */
1598}
1599
1600#if EV_VERIFY
1601static void noinline
1602verify_watcher (EV_P_ W w)
1603{
1604 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1605
1606 if (w->pending)
1607 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1608}
1609
1610static void noinline
1611verify_heap (EV_P_ ANHE *heap, int N)
1612{
1613 int i;
1614
1615 for (i = HEAP0; i < N + HEAP0; ++i)
1616 {
1617 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1618 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1619 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1620
1621 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1622 }
1623}
1624
1625static void noinline
1626array_verify (EV_P_ W *ws, int cnt)
1627{
1628 while (cnt--)
1629 {
1630 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1631 verify_watcher (EV_A_ ws [cnt]);
1632 }
1633}
1634#endif
1635
1636void
1637ev_loop_verify (EV_P)
1638{
1639#if EV_VERIFY
1640 int i;
1641 WL w;
1642
1643 assert (activecnt >= -1);
1644
1645 assert (fdchangemax >= fdchangecnt);
1646 for (i = 0; i < fdchangecnt; ++i)
1647 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1648
1649 assert (anfdmax >= 0);
1650 for (i = 0; i < anfdmax; ++i)
1651 for (w = anfds [i].head; w; w = w->next)
1652 {
1653 verify_watcher (EV_A_ (W)w);
1654 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1655 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1656 }
1657
1658 assert (timermax >= timercnt);
1659 verify_heap (EV_A_ timers, timercnt);
1660
1661#if EV_PERIODIC_ENABLE
1662 assert (periodicmax >= periodiccnt);
1663 verify_heap (EV_A_ periodics, periodiccnt);
1664#endif
1665
1666 for (i = NUMPRI; i--; )
1667 {
1668 assert (pendingmax [i] >= pendingcnt [i]);
1669#if EV_IDLE_ENABLE
1670 assert (idleall >= 0);
1671 assert (idlemax [i] >= idlecnt [i]);
1672 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1673#endif
1674 }
1675
1676#if EV_FORK_ENABLE
1677 assert (forkmax >= forkcnt);
1678 array_verify (EV_A_ (W *)forks, forkcnt);
1679#endif
1680
1681#if EV_ASYNC_ENABLE
1682 assert (asyncmax >= asynccnt);
1683 array_verify (EV_A_ (W *)asyncs, asynccnt);
1684#endif
1685
1686 assert (preparemax >= preparecnt);
1687 array_verify (EV_A_ (W *)prepares, preparecnt);
1688
1689 assert (checkmax >= checkcnt);
1690 array_verify (EV_A_ (W *)checks, checkcnt);
1691
1692# if 0
1693 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1694 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1695# endif
1696#endif
1697}
1698
1699#endif /* multiplicity */
1700
1701#if EV_MULTIPLICITY
1702struct ev_loop *
1703ev_default_loop_init (unsigned int flags)
1704#else
533int 1705int
534ev_method (EV_P) 1706ev_default_loop (unsigned int flags)
1707#endif
535{ 1708{
536 return method; 1709 if (!ev_default_loop_ptr)
537} 1710 {
538
539int
540ev_init (EV_P_ int methods)
541{
542#ifdef EV_MULTIPLICITY 1711#if EV_MULTIPLICITY
543 memset (loop, 0, sizeof (struct ev_loop)); 1712 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1713#else
1714 ev_default_loop_ptr = 1;
544#endif 1715#endif
545 1716
546 if (!method) 1717 loop_init (EV_A_ flags);
547 {
548#if EV_USE_MONOTONIC
549 {
550 struct timespec ts;
551 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
552 have_monotonic = 1;
553 }
554#endif
555 1718
556 rt_now = ev_time (); 1719 if (ev_backend (EV_A))
557 mn_now = get_clock ();
558 now_floor = mn_now;
559 diff = rt_now - mn_now;
560
561 if (pipe (sigpipe))
562 return 0;
563
564 if (methods == EVMETHOD_AUTO)
565 if (!enable_secure () && getenv ("LIBmethodS"))
566 methods = atoi (getenv ("LIBmethodS"));
567 else
568 methods = EVMETHOD_ANY;
569
570 method = 0;
571#if EV_USE_KQUEUE
572 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
573#endif
574#if EV_USE_EPOLL
575 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
576#endif
577#if EV_USEV_POLL
578 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
579#endif
580#if EV_USE_SELECT
581 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
582#endif
583
584 if (method)
585 { 1720 {
586 ev_watcher_init (&sigev, sigcb);
587 ev_set_priority (&sigev, EV_MAXPRI);
588 siginit (EV_A);
589
590#ifndef WIN32 1721#ifndef _WIN32
591 ev_signal_init (&childev, childcb, SIGCHLD); 1722 ev_signal_init (&childev, childcb, SIGCHLD);
592 ev_set_priority (&childev, EV_MAXPRI); 1723 ev_set_priority (&childev, EV_MAXPRI);
593 ev_signal_start (EV_A_ &childev); 1724 ev_signal_start (EV_A_ &childev);
594 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1725 ev_unref (EV_A); /* child watcher should not keep loop alive */
595#endif 1726#endif
596 } 1727 }
1728 else
1729 ev_default_loop_ptr = 0;
597 } 1730 }
598 1731
599 return method; 1732 return ev_default_loop_ptr;
1733}
1734
1735void
1736ev_default_destroy (void)
1737{
1738#if EV_MULTIPLICITY
1739 struct ev_loop *loop = ev_default_loop_ptr;
1740#endif
1741
1742 ev_default_loop_ptr = 0;
1743
1744#ifndef _WIN32
1745 ev_ref (EV_A); /* child watcher */
1746 ev_signal_stop (EV_A_ &childev);
1747#endif
1748
1749 loop_destroy (EV_A);
1750}
1751
1752void
1753ev_default_fork (void)
1754{
1755#if EV_MULTIPLICITY
1756 struct ev_loop *loop = ev_default_loop_ptr;
1757#endif
1758
1759 postfork = 1; /* must be in line with ev_loop_fork */
600} 1760}
601 1761
602/*****************************************************************************/ 1762/*****************************************************************************/
603 1763
604void 1764void
605ev_fork_prepare (void) 1765ev_invoke (EV_P_ void *w, int revents)
606{ 1766{
607 /* nop */ 1767 EV_CB_INVOKE ((W)w, revents);
608} 1768}
609 1769
610void 1770inline_speed void
611ev_fork_parent (void)
612{
613 /* nop */
614}
615
616void
617ev_fork_child (void)
618{
619#if EV_USE_EPOLL
620 if (method == EVMETHOD_EPOLL)
621 epoll_postfork_child ();
622#endif
623
624 ev_io_stop (&sigev);
625 close (sigpipe [0]);
626 close (sigpipe [1]);
627 pipe (sigpipe);
628 siginit ();
629}
630
631/*****************************************************************************/
632
633static void
634call_pending (EV_P) 1771call_pending (EV_P)
635{ 1772{
636 int pri; 1773 int pri;
637 1774
638 for (pri = NUMPRI; pri--; ) 1775 for (pri = NUMPRI; pri--; )
639 while (pendingcnt [pri]) 1776 while (pendingcnt [pri])
640 { 1777 {
641 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1778 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
642 1779
643 if (p->w) 1780 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
644 { 1781 /* ^ this is no longer true, as pending_w could be here */
1782
645 p->w->pending = 0; 1783 p->w->pending = 0;
646 p->w->cb (EV_A_ p->w, p->events); 1784 EV_CB_INVOKE (p->w, p->events);
647 } 1785 EV_FREQUENT_CHECK;
648 } 1786 }
649} 1787}
650 1788
651static void 1789#if EV_IDLE_ENABLE
1790/* make idle watchers pending. this handles the "call-idle */
1791/* only when higher priorities are idle" logic */
1792inline_size void
652timers_reify (EV_P) 1793idle_reify (EV_P)
653{ 1794{
654 while (timercnt && timers [0]->at <= mn_now) 1795 if (expect_false (idleall))
655 { 1796 {
656 struct ev_timer *w = timers [0]; 1797 int pri;
657 1798
658 /* first reschedule or stop timer */ 1799 for (pri = NUMPRI; pri--; )
659 if (w->repeat)
660 { 1800 {
661 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1801 if (pendingcnt [pri])
662 w->at = mn_now + w->repeat; 1802 break;
663 downheap ((WT *)timers, timercnt, 0);
664 }
665 else
666 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
667 1803
668 event ((W)w, EV_TIMEOUT); 1804 if (idlecnt [pri])
669 }
670}
671
672static void
673periodics_reify (EV_P)
674{
675 while (periodiccnt && periodics [0]->at <= rt_now)
676 {
677 struct ev_periodic *w = periodics [0];
678
679 /* first reschedule or stop timer */
680 if (w->interval)
681 {
682 w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
683 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
684 downheap ((WT *)periodics, periodiccnt, 0);
685 }
686 else
687 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
688
689 event (EV_A_ (W)w, EV_PERIODIC);
690 }
691}
692
693static void
694periodics_reschedule (EV_P_ ev_tstamp diff)
695{
696 int i;
697
698 /* adjust periodics after time jump */
699 for (i = 0; i < periodiccnt; ++i)
700 {
701 struct ev_periodic *w = periodics [i];
702
703 if (w->interval)
704 {
705 ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
706
707 if (fabs (diff) >= 1e-4)
708 { 1805 {
709 ev_periodic_stop (EV_A_ w); 1806 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
710 ev_periodic_start (EV_A_ w); 1807 break;
711
712 i = 0; /* restart loop, inefficient, but time jumps should be rare */
713 } 1808 }
714 } 1809 }
715 } 1810 }
716} 1811}
1812#endif
717 1813
718inline int 1814/* make timers pending */
719time_update_monotonic (EV_P) 1815inline_size void
1816timers_reify (EV_P)
720{ 1817{
721 mn_now = get_clock (); 1818 EV_FREQUENT_CHECK;
722 1819
723 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 1820 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
724 {
725 rt_now = mn_now + diff;
726 return 0;
727 } 1821 {
728 else 1822 do
1823 {
1824 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1825
1826 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
1827
1828 /* first reschedule or stop timer */
1829 if (w->repeat)
1830 {
1831 ev_at (w) += w->repeat;
1832 if (ev_at (w) < mn_now)
1833 ev_at (w) = mn_now;
1834
1835 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1836
1837 ANHE_at_cache (timers [HEAP0]);
1838 downheap (timers, timercnt, HEAP0);
1839 }
1840 else
1841 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1842
1843 EV_FREQUENT_CHECK;
1844 feed_reverse (EV_A_ (W)w);
1845 }
1846 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1847
1848 feed_reverse_done (EV_A_ EV_TIMEOUT);
729 { 1849 }
730 now_floor = mn_now; 1850}
731 rt_now = ev_time (); 1851
732 return 1; 1852#if EV_PERIODIC_ENABLE
1853/* make periodics pending */
1854inline_size void
1855periodics_reify (EV_P)
1856{
1857 EV_FREQUENT_CHECK;
1858
1859 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
733 } 1860 {
734} 1861 int feed_count = 0;
735 1862
736static void 1863 do
737time_update (EV_P) 1864 {
1865 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1866
1867 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1868
1869 /* first reschedule or stop timer */
1870 if (w->reschedule_cb)
1871 {
1872 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1873
1874 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1875
1876 ANHE_at_cache (periodics [HEAP0]);
1877 downheap (periodics, periodiccnt, HEAP0);
1878 }
1879 else if (w->interval)
1880 {
1881 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1882 /* if next trigger time is not sufficiently in the future, put it there */
1883 /* this might happen because of floating point inexactness */
1884 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1885 {
1886 ev_at (w) += w->interval;
1887
1888 /* if interval is unreasonably low we might still have a time in the past */
1889 /* so correct this. this will make the periodic very inexact, but the user */
1890 /* has effectively asked to get triggered more often than possible */
1891 if (ev_at (w) < ev_rt_now)
1892 ev_at (w) = ev_rt_now;
1893 }
1894
1895 ANHE_at_cache (periodics [HEAP0]);
1896 downheap (periodics, periodiccnt, HEAP0);
1897 }
1898 else
1899 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1900
1901 EV_FREQUENT_CHECK;
1902 feed_reverse (EV_A_ (W)w);
1903 }
1904 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1905
1906 feed_reverse_done (EV_A_ EV_PERIODIC);
1907 }
1908}
1909
1910/* simply recalculate all periodics */
1911/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1912static void noinline
1913periodics_reschedule (EV_P)
738{ 1914{
739 int i; 1915 int i;
740 1916
1917 /* adjust periodics after time jump */
1918 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1919 {
1920 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1921
1922 if (w->reschedule_cb)
1923 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1924 else if (w->interval)
1925 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1926
1927 ANHE_at_cache (periodics [i]);
1928 }
1929
1930 reheap (periodics, periodiccnt);
1931}
1932#endif
1933
1934/* adjust all timers by a given offset */
1935static void noinline
1936timers_reschedule (EV_P_ ev_tstamp adjust)
1937{
1938 int i;
1939
1940 for (i = 0; i < timercnt; ++i)
1941 {
1942 ANHE *he = timers + i + HEAP0;
1943 ANHE_w (*he)->at += adjust;
1944 ANHE_at_cache (*he);
1945 }
1946}
1947
1948/* fetch new monotonic and realtime times from the kernel */
1949/* also detetc if there was a timejump, and act accordingly */
1950inline_speed void
1951time_update (EV_P_ ev_tstamp max_block)
1952{
741#if EV_USE_MONOTONIC 1953#if EV_USE_MONOTONIC
742 if (expect_true (have_monotonic)) 1954 if (expect_true (have_monotonic))
743 { 1955 {
744 if (time_update_monotonic (EV_A)) 1956 int i;
1957 ev_tstamp odiff = rtmn_diff;
1958
1959 mn_now = get_clock ();
1960
1961 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1962 /* interpolate in the meantime */
1963 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
745 { 1964 {
746 ev_tstamp odiff = diff; 1965 ev_rt_now = rtmn_diff + mn_now;
747 1966 return;
748 for (i = 4; --i; ) /* loop a few times, before making important decisions */
749 {
750 diff = rt_now - mn_now;
751
752 if (fabs (odiff - diff) < MIN_TIMEJUMP)
753 return; /* all is well */
754
755 rt_now = ev_time ();
756 mn_now = get_clock ();
757 now_floor = mn_now;
758 }
759
760 periodics_reschedule (EV_A_ diff - odiff);
761 /* no timer adjustment, as the monotonic clock doesn't jump */
762 } 1967 }
1968
1969 now_floor = mn_now;
1970 ev_rt_now = ev_time ();
1971
1972 /* loop a few times, before making important decisions.
1973 * on the choice of "4": one iteration isn't enough,
1974 * in case we get preempted during the calls to
1975 * ev_time and get_clock. a second call is almost guaranteed
1976 * to succeed in that case, though. and looping a few more times
1977 * doesn't hurt either as we only do this on time-jumps or
1978 * in the unlikely event of having been preempted here.
1979 */
1980 for (i = 4; --i; )
1981 {
1982 rtmn_diff = ev_rt_now - mn_now;
1983
1984 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1985 return; /* all is well */
1986
1987 ev_rt_now = ev_time ();
1988 mn_now = get_clock ();
1989 now_floor = mn_now;
1990 }
1991
1992 /* no timer adjustment, as the monotonic clock doesn't jump */
1993 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1994# if EV_PERIODIC_ENABLE
1995 periodics_reschedule (EV_A);
1996# endif
763 } 1997 }
764 else 1998 else
765#endif 1999#endif
766 { 2000 {
767 rt_now = ev_time (); 2001 ev_rt_now = ev_time ();
768 2002
769 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 2003 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
770 { 2004 {
771 periodics_reschedule (EV_A_ rt_now - mn_now);
772
773 /* adjust timers. this is easy, as the offset is the same for all */ 2005 /* adjust timers. this is easy, as the offset is the same for all of them */
774 for (i = 0; i < timercnt; ++i) 2006 timers_reschedule (EV_A_ ev_rt_now - mn_now);
775 timers [i]->at += diff; 2007#if EV_PERIODIC_ENABLE
2008 periodics_reschedule (EV_A);
2009#endif
776 } 2010 }
777 2011
778 mn_now = rt_now; 2012 mn_now = ev_rt_now;
779 } 2013 }
780}
781
782void
783ev_ref (EV_P)
784{
785 ++activecnt;
786}
787
788void
789ev_unref (EV_P)
790{
791 --activecnt;
792} 2014}
793 2015
794static int loop_done; 2016static int loop_done;
795 2017
796void 2018void
797ev_loop (EV_P_ int flags) 2019ev_loop (EV_P_ int flags)
798{ 2020{
799 double block; 2021 loop_done = EVUNLOOP_CANCEL;
800 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 2022
2023 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
801 2024
802 do 2025 do
803 { 2026 {
2027#if EV_VERIFY >= 2
2028 ev_loop_verify (EV_A);
2029#endif
2030
2031#ifndef _WIN32
2032 if (expect_false (curpid)) /* penalise the forking check even more */
2033 if (expect_false (getpid () != curpid))
2034 {
2035 curpid = getpid ();
2036 postfork = 1;
2037 }
2038#endif
2039
2040#if EV_FORK_ENABLE
2041 /* we might have forked, so queue fork handlers */
2042 if (expect_false (postfork))
2043 if (forkcnt)
2044 {
2045 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2046 call_pending (EV_A);
2047 }
2048#endif
2049
804 /* queue check watchers (and execute them) */ 2050 /* queue prepare watchers (and execute them) */
805 if (expect_false (preparecnt)) 2051 if (expect_false (preparecnt))
806 { 2052 {
807 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2053 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
808 call_pending (EV_A); 2054 call_pending (EV_A);
809 } 2055 }
810 2056
2057 /* we might have forked, so reify kernel state if necessary */
2058 if (expect_false (postfork))
2059 loop_fork (EV_A);
2060
811 /* update fd-related kernel structures */ 2061 /* update fd-related kernel structures */
812 fd_reify (EV_A); 2062 fd_reify (EV_A);
813 2063
814 /* calculate blocking time */ 2064 /* calculate blocking time */
2065 {
2066 ev_tstamp waittime = 0.;
2067 ev_tstamp sleeptime = 0.;
815 2068
816 /* we only need this for !monotonic clockor timers, but as we basically 2069 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
817 always have timers, we just calculate it always */
818#if EV_USE_MONOTONIC
819 if (expect_true (have_monotonic))
820 time_update_monotonic (EV_A);
821 else
822#endif
823 { 2070 {
824 rt_now = ev_time (); 2071 /* update time to cancel out callback processing overhead */
825 mn_now = rt_now; 2072 time_update (EV_A_ 1e100);
826 }
827 2073
828 if (flags & EVLOOP_NONBLOCK || idlecnt)
829 block = 0.;
830 else
831 {
832 block = MAX_BLOCKTIME; 2074 waittime = MAX_BLOCKTIME;
833 2075
834 if (timercnt) 2076 if (timercnt)
835 { 2077 {
836 ev_tstamp to = timers [0]->at - mn_now + method_fudge; 2078 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
837 if (block > to) block = to; 2079 if (waittime > to) waittime = to;
838 } 2080 }
839 2081
2082#if EV_PERIODIC_ENABLE
840 if (periodiccnt) 2083 if (periodiccnt)
841 { 2084 {
842 ev_tstamp to = periodics [0]->at - rt_now + method_fudge; 2085 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
843 if (block > to) block = to; 2086 if (waittime > to) waittime = to;
844 } 2087 }
2088#endif
845 2089
846 if (block < 0.) block = 0.; 2090 if (expect_false (waittime < timeout_blocktime))
2091 waittime = timeout_blocktime;
2092
2093 sleeptime = waittime - backend_fudge;
2094
2095 if (expect_true (sleeptime > io_blocktime))
2096 sleeptime = io_blocktime;
2097
2098 if (sleeptime)
2099 {
2100 ev_sleep (sleeptime);
2101 waittime -= sleeptime;
2102 }
847 } 2103 }
848 2104
849 method_poll (EV_A_ block); 2105 ++loop_count;
2106 backend_poll (EV_A_ waittime);
850 2107
851 /* update rt_now, do magic */ 2108 /* update ev_rt_now, do magic */
852 time_update (EV_A); 2109 time_update (EV_A_ waittime + sleeptime);
2110 }
853 2111
854 /* queue pending timers and reschedule them */ 2112 /* queue pending timers and reschedule them */
855 timers_reify (EV_A); /* relative timers called last */ 2113 timers_reify (EV_A); /* relative timers called last */
2114#if EV_PERIODIC_ENABLE
856 periodics_reify (EV_A); /* absolute timers called first */ 2115 periodics_reify (EV_A); /* absolute timers called first */
2116#endif
857 2117
2118#if EV_IDLE_ENABLE
858 /* queue idle watchers unless io or timers are pending */ 2119 /* queue idle watchers unless other events are pending */
859 if (!pendingcnt) 2120 idle_reify (EV_A);
860 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2121#endif
861 2122
862 /* queue check watchers, to be executed first */ 2123 /* queue check watchers, to be executed first */
863 if (checkcnt) 2124 if (expect_false (checkcnt))
864 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2125 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
865 2126
866 call_pending (EV_A); 2127 call_pending (EV_A);
867 } 2128 }
868 while (activecnt && !loop_done); 2129 while (expect_true (
2130 activecnt
2131 && !loop_done
2132 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2133 ));
869 2134
870 if (loop_done != 2) 2135 if (loop_done == EVUNLOOP_ONE)
871 loop_done = 0; 2136 loop_done = EVUNLOOP_CANCEL;
872} 2137}
873 2138
874void 2139void
875ev_unloop (EV_P_ int how) 2140ev_unloop (EV_P_ int how)
876{ 2141{
877 loop_done = how; 2142 loop_done = how;
878} 2143}
879 2144
2145void
2146ev_ref (EV_P)
2147{
2148 ++activecnt;
2149}
2150
2151void
2152ev_unref (EV_P)
2153{
2154 --activecnt;
2155}
2156
2157void
2158ev_now_update (EV_P)
2159{
2160 time_update (EV_A_ 1e100);
2161}
2162
2163void
2164ev_suspend (EV_P)
2165{
2166 ev_now_update (EV_A);
2167}
2168
2169void
2170ev_resume (EV_P)
2171{
2172 ev_tstamp mn_prev = mn_now;
2173
2174 ev_now_update (EV_A);
2175 timers_reschedule (EV_A_ mn_now - mn_prev);
2176#if EV_PERIODIC_ENABLE
2177 /* TODO: really do this? */
2178 periodics_reschedule (EV_A);
2179#endif
2180}
2181
880/*****************************************************************************/ 2182/*****************************************************************************/
2183/* singly-linked list management, used when the expected list length is short */
881 2184
882inline void 2185inline_size void
883wlist_add (WL *head, WL elem) 2186wlist_add (WL *head, WL elem)
884{ 2187{
885 elem->next = *head; 2188 elem->next = *head;
886 *head = elem; 2189 *head = elem;
887} 2190}
888 2191
889inline void 2192inline_size void
890wlist_del (WL *head, WL elem) 2193wlist_del (WL *head, WL elem)
891{ 2194{
892 while (*head) 2195 while (*head)
893 { 2196 {
894 if (*head == elem) 2197 if (*head == elem)
… …
899 2202
900 head = &(*head)->next; 2203 head = &(*head)->next;
901 } 2204 }
902} 2205}
903 2206
2207/* internal, faster, version of ev_clear_pending */
904inline void 2208inline_speed void
905ev_clear_pending (EV_P_ W w) 2209clear_pending (EV_P_ W w)
906{ 2210{
907 if (w->pending) 2211 if (w->pending)
908 { 2212 {
909 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2213 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
910 w->pending = 0; 2214 w->pending = 0;
911 } 2215 }
912} 2216}
913 2217
2218int
2219ev_clear_pending (EV_P_ void *w)
2220{
2221 W w_ = (W)w;
2222 int pending = w_->pending;
2223
2224 if (expect_true (pending))
2225 {
2226 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2227 p->w = (W)&pending_w;
2228 w_->pending = 0;
2229 return p->events;
2230 }
2231 else
2232 return 0;
2233}
2234
914inline void 2235inline_size void
2236pri_adjust (EV_P_ W w)
2237{
2238 int pri = w->priority;
2239 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2240 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2241 w->priority = pri;
2242}
2243
2244inline_speed void
915ev_start (EV_P_ W w, int active) 2245ev_start (EV_P_ W w, int active)
916{ 2246{
917 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2247 pri_adjust (EV_A_ w);
918 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
919
920 w->active = active; 2248 w->active = active;
921 ev_ref (EV_A); 2249 ev_ref (EV_A);
922} 2250}
923 2251
924inline void 2252inline_size void
925ev_stop (EV_P_ W w) 2253ev_stop (EV_P_ W w)
926{ 2254{
927 ev_unref (EV_A); 2255 ev_unref (EV_A);
928 w->active = 0; 2256 w->active = 0;
929} 2257}
930 2258
931/*****************************************************************************/ 2259/*****************************************************************************/
932 2260
933void 2261void noinline
934ev_io_start (EV_P_ struct ev_io *w) 2262ev_io_start (EV_P_ ev_io *w)
935{ 2263{
936 int fd = w->fd; 2264 int fd = w->fd;
937 2265
938 if (ev_is_active (w)) 2266 if (expect_false (ev_is_active (w)))
939 return; 2267 return;
940 2268
941 assert (("ev_io_start called with negative fd", fd >= 0)); 2269 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2270 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2271
2272 EV_FREQUENT_CHECK;
942 2273
943 ev_start (EV_A_ (W)w, 1); 2274 ev_start (EV_A_ (W)w, 1);
944 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2275 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
945 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2276 wlist_add (&anfds[fd].head, (WL)w);
946 2277
947 fd_change (EV_A_ fd); 2278 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
948} 2279 w->events &= ~EV__IOFDSET;
949 2280
950void 2281 EV_FREQUENT_CHECK;
2282}
2283
2284void noinline
951ev_io_stop (EV_P_ struct ev_io *w) 2285ev_io_stop (EV_P_ ev_io *w)
952{ 2286{
953 ev_clear_pending (EV_A_ (W)w); 2287 clear_pending (EV_A_ (W)w);
954 if (!ev_is_active (w)) 2288 if (expect_false (!ev_is_active (w)))
955 return; 2289 return;
956 2290
2291 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2292
2293 EV_FREQUENT_CHECK;
2294
957 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2295 wlist_del (&anfds[w->fd].head, (WL)w);
958 ev_stop (EV_A_ (W)w); 2296 ev_stop (EV_A_ (W)w);
959 2297
960 fd_change (EV_A_ w->fd); 2298 fd_change (EV_A_ w->fd, 1);
961}
962 2299
963void 2300 EV_FREQUENT_CHECK;
2301}
2302
2303void noinline
964ev_timer_start (EV_P_ struct ev_timer *w) 2304ev_timer_start (EV_P_ ev_timer *w)
965{ 2305{
966 if (ev_is_active (w)) 2306 if (expect_false (ev_is_active (w)))
967 return; 2307 return;
968 2308
969 w->at += mn_now; 2309 ev_at (w) += mn_now;
970 2310
971 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2311 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
972 2312
2313 EV_FREQUENT_CHECK;
2314
2315 ++timercnt;
973 ev_start (EV_A_ (W)w, ++timercnt); 2316 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
974 array_needsize (timers, timermax, timercnt, ); 2317 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
975 timers [timercnt - 1] = w; 2318 ANHE_w (timers [ev_active (w)]) = (WT)w;
976 upheap ((WT *)timers, timercnt - 1); 2319 ANHE_at_cache (timers [ev_active (w)]);
977} 2320 upheap (timers, ev_active (w));
978 2321
979void 2322 EV_FREQUENT_CHECK;
2323
2324 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2325}
2326
2327void noinline
980ev_timer_stop (EV_P_ struct ev_timer *w) 2328ev_timer_stop (EV_P_ ev_timer *w)
981{ 2329{
982 ev_clear_pending (EV_A_ (W)w); 2330 clear_pending (EV_A_ (W)w);
983 if (!ev_is_active (w)) 2331 if (expect_false (!ev_is_active (w)))
984 return; 2332 return;
985 2333
986 if (w->active < timercnt--) 2334 EV_FREQUENT_CHECK;
2335
2336 {
2337 int active = ev_active (w);
2338
2339 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2340
2341 --timercnt;
2342
2343 if (expect_true (active < timercnt + HEAP0))
987 { 2344 {
988 timers [w->active - 1] = timers [timercnt]; 2345 timers [active] = timers [timercnt + HEAP0];
989 downheap ((WT *)timers, timercnt, w->active - 1); 2346 adjustheap (timers, timercnt, active);
990 } 2347 }
2348 }
991 2349
992 w->at = w->repeat; 2350 EV_FREQUENT_CHECK;
2351
2352 ev_at (w) -= mn_now;
993 2353
994 ev_stop (EV_A_ (W)w); 2354 ev_stop (EV_A_ (W)w);
995} 2355}
996 2356
997void 2357void noinline
998ev_timer_again (EV_P_ struct ev_timer *w) 2358ev_timer_again (EV_P_ ev_timer *w)
999{ 2359{
2360 EV_FREQUENT_CHECK;
2361
1000 if (ev_is_active (w)) 2362 if (ev_is_active (w))
1001 { 2363 {
1002 if (w->repeat) 2364 if (w->repeat)
1003 { 2365 {
1004 w->at = mn_now + w->repeat; 2366 ev_at (w) = mn_now + w->repeat;
2367 ANHE_at_cache (timers [ev_active (w)]);
1005 downheap ((WT *)timers, timercnt, w->active - 1); 2368 adjustheap (timers, timercnt, ev_active (w));
1006 } 2369 }
1007 else 2370 else
1008 ev_timer_stop (EV_A_ w); 2371 ev_timer_stop (EV_A_ w);
1009 } 2372 }
1010 else if (w->repeat) 2373 else if (w->repeat)
2374 {
2375 ev_at (w) = w->repeat;
1011 ev_timer_start (EV_A_ w); 2376 ev_timer_start (EV_A_ w);
1012} 2377 }
1013 2378
1014void 2379 EV_FREQUENT_CHECK;
2380}
2381
2382#if EV_PERIODIC_ENABLE
2383void noinline
1015ev_periodic_start (EV_P_ struct ev_periodic *w) 2384ev_periodic_start (EV_P_ ev_periodic *w)
1016{ 2385{
1017 if (ev_is_active (w)) 2386 if (expect_false (ev_is_active (w)))
1018 return; 2387 return;
1019 2388
2389 if (w->reschedule_cb)
2390 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2391 else if (w->interval)
2392 {
1020 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2393 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1021
1022 /* this formula differs from the one in periodic_reify because we do not always round up */ 2394 /* this formula differs from the one in periodic_reify because we do not always round up */
1023 if (w->interval)
1024 w->at += ceil ((rt_now - w->at) / w->interval) * w->interval; 2395 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2396 }
2397 else
2398 ev_at (w) = w->offset;
1025 2399
2400 EV_FREQUENT_CHECK;
2401
2402 ++periodiccnt;
1026 ev_start (EV_A_ (W)w, ++periodiccnt); 2403 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1027 array_needsize (periodics, periodicmax, periodiccnt, ); 2404 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1028 periodics [periodiccnt - 1] = w; 2405 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1029 upheap ((WT *)periodics, periodiccnt - 1); 2406 ANHE_at_cache (periodics [ev_active (w)]);
1030} 2407 upheap (periodics, ev_active (w));
1031 2408
1032void 2409 EV_FREQUENT_CHECK;
2410
2411 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2412}
2413
2414void noinline
1033ev_periodic_stop (EV_P_ struct ev_periodic *w) 2415ev_periodic_stop (EV_P_ ev_periodic *w)
1034{ 2416{
1035 ev_clear_pending (EV_A_ (W)w); 2417 clear_pending (EV_A_ (W)w);
1036 if (!ev_is_active (w)) 2418 if (expect_false (!ev_is_active (w)))
1037 return; 2419 return;
1038 2420
1039 if (w->active < periodiccnt--) 2421 EV_FREQUENT_CHECK;
2422
2423 {
2424 int active = ev_active (w);
2425
2426 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2427
2428 --periodiccnt;
2429
2430 if (expect_true (active < periodiccnt + HEAP0))
1040 { 2431 {
1041 periodics [w->active - 1] = periodics [periodiccnt]; 2432 periodics [active] = periodics [periodiccnt + HEAP0];
1042 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2433 adjustheap (periodics, periodiccnt, active);
1043 } 2434 }
2435 }
2436
2437 EV_FREQUENT_CHECK;
1044 2438
1045 ev_stop (EV_A_ (W)w); 2439 ev_stop (EV_A_ (W)w);
1046} 2440}
2441
2442void noinline
2443ev_periodic_again (EV_P_ ev_periodic *w)
2444{
2445 /* TODO: use adjustheap and recalculation */
2446 ev_periodic_stop (EV_A_ w);
2447 ev_periodic_start (EV_A_ w);
2448}
2449#endif
1047 2450
1048#ifndef SA_RESTART 2451#ifndef SA_RESTART
1049# define SA_RESTART 0 2452# define SA_RESTART 0
1050#endif 2453#endif
1051 2454
1052void 2455void noinline
1053ev_signal_start (EV_P_ struct ev_signal *w) 2456ev_signal_start (EV_P_ ev_signal *w)
1054{ 2457{
2458#if EV_MULTIPLICITY
2459 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2460#endif
1055 if (ev_is_active (w)) 2461 if (expect_false (ev_is_active (w)))
1056 return; 2462 return;
1057 2463
1058 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2464 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2465
2466 evpipe_init (EV_A);
2467
2468 EV_FREQUENT_CHECK;
2469
2470 {
2471#ifndef _WIN32
2472 sigset_t full, prev;
2473 sigfillset (&full);
2474 sigprocmask (SIG_SETMASK, &full, &prev);
2475#endif
2476
2477 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2478
2479#ifndef _WIN32
2480 sigprocmask (SIG_SETMASK, &prev, 0);
2481#endif
2482 }
1059 2483
1060 ev_start (EV_A_ (W)w, 1); 2484 ev_start (EV_A_ (W)w, 1);
1061 array_needsize (signals, signalmax, w->signum, signals_init);
1062 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2485 wlist_add (&signals [w->signum - 1].head, (WL)w);
1063 2486
1064 if (!w->next) 2487 if (!((WL)w)->next)
1065 { 2488 {
2489#if _WIN32
2490 signal (w->signum, ev_sighandler);
2491#else
1066 struct sigaction sa; 2492 struct sigaction sa;
1067 sa.sa_handler = sighandler; 2493 sa.sa_handler = ev_sighandler;
1068 sigfillset (&sa.sa_mask); 2494 sigfillset (&sa.sa_mask);
1069 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2495 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1070 sigaction (w->signum, &sa, 0); 2496 sigaction (w->signum, &sa, 0);
2497#endif
1071 } 2498 }
1072}
1073 2499
1074void 2500 EV_FREQUENT_CHECK;
2501}
2502
2503void noinline
1075ev_signal_stop (EV_P_ struct ev_signal *w) 2504ev_signal_stop (EV_P_ ev_signal *w)
1076{ 2505{
1077 ev_clear_pending (EV_A_ (W)w); 2506 clear_pending (EV_A_ (W)w);
1078 if (!ev_is_active (w)) 2507 if (expect_false (!ev_is_active (w)))
1079 return; 2508 return;
1080 2509
2510 EV_FREQUENT_CHECK;
2511
1081 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2512 wlist_del (&signals [w->signum - 1].head, (WL)w);
1082 ev_stop (EV_A_ (W)w); 2513 ev_stop (EV_A_ (W)w);
1083 2514
1084 if (!signals [w->signum - 1].head) 2515 if (!signals [w->signum - 1].head)
1085 signal (w->signum, SIG_DFL); 2516 signal (w->signum, SIG_DFL);
1086}
1087 2517
2518 EV_FREQUENT_CHECK;
2519}
2520
1088void 2521void
1089ev_idle_start (EV_P_ struct ev_idle *w) 2522ev_child_start (EV_P_ ev_child *w)
1090{ 2523{
2524#if EV_MULTIPLICITY
2525 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2526#endif
1091 if (ev_is_active (w)) 2527 if (expect_false (ev_is_active (w)))
1092 return; 2528 return;
1093 2529
2530 EV_FREQUENT_CHECK;
2531
1094 ev_start (EV_A_ (W)w, ++idlecnt); 2532 ev_start (EV_A_ (W)w, 1);
1095 array_needsize (idles, idlemax, idlecnt, ); 2533 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1096 idles [idlecnt - 1] = w;
1097}
1098 2534
2535 EV_FREQUENT_CHECK;
2536}
2537
1099void 2538void
1100ev_idle_stop (EV_P_ struct ev_idle *w) 2539ev_child_stop (EV_P_ ev_child *w)
1101{ 2540{
1102 ev_clear_pending (EV_A_ (W)w); 2541 clear_pending (EV_A_ (W)w);
1103 if (ev_is_active (w)) 2542 if (expect_false (!ev_is_active (w)))
1104 return; 2543 return;
1105 2544
1106 idles [w->active - 1] = idles [--idlecnt]; 2545 EV_FREQUENT_CHECK;
2546
2547 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1107 ev_stop (EV_A_ (W)w); 2548 ev_stop (EV_A_ (W)w);
1108}
1109 2549
1110void 2550 EV_FREQUENT_CHECK;
1111ev_prepare_start (EV_P_ struct ev_prepare *w) 2551}
2552
2553#if EV_STAT_ENABLE
2554
2555# ifdef _WIN32
2556# undef lstat
2557# define lstat(a,b) _stati64 (a,b)
2558# endif
2559
2560#define DEF_STAT_INTERVAL 5.0074891
2561#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2562#define MIN_STAT_INTERVAL 0.1074891
2563
2564static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2565
2566#if EV_USE_INOTIFY
2567# define EV_INOTIFY_BUFSIZE 8192
2568
2569static void noinline
2570infy_add (EV_P_ ev_stat *w)
1112{ 2571{
1113 if (ev_is_active (w)) 2572 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);
2573
2574 if (w->wd < 0)
2575 {
2576 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2577 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2578
2579 /* monitor some parent directory for speedup hints */
2580 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2581 /* but an efficiency issue only */
2582 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2583 {
2584 char path [4096];
2585 strcpy (path, w->path);
2586
2587 do
2588 {
2589 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2590 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2591
2592 char *pend = strrchr (path, '/');
2593
2594 if (!pend || pend == path)
2595 break;
2596
2597 *pend = 0;
2598 w->wd = inotify_add_watch (fs_fd, path, mask);
2599 }
2600 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2601 }
2602 }
2603
2604 if (w->wd >= 0)
2605 {
2606 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2607
2608 /* now local changes will be tracked by inotify, but remote changes won't */
2609 /* unless the filesystem it known to be local, we therefore still poll */
2610 /* also do poll on <2.6.25, but with normal frequency */
2611 struct statfs sfs;
2612
2613 if (fs_2625 && !statfs (w->path, &sfs))
2614 if (sfs.f_type == 0x1373 /* devfs */
2615 || sfs.f_type == 0xEF53 /* ext2/3 */
2616 || sfs.f_type == 0x3153464a /* jfs */
2617 || sfs.f_type == 0x52654973 /* reiser3 */
2618 || sfs.f_type == 0x01021994 /* tempfs */
2619 || sfs.f_type == 0x58465342 /* xfs */)
2620 return;
2621
2622 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2623 ev_timer_again (EV_A_ &w->timer);
2624 }
2625}
2626
2627static void noinline
2628infy_del (EV_P_ ev_stat *w)
2629{
2630 int slot;
2631 int wd = w->wd;
2632
2633 if (wd < 0)
1114 return; 2634 return;
1115 2635
2636 w->wd = -2;
2637 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2638 wlist_del (&fs_hash [slot].head, (WL)w);
2639
2640 /* remove this watcher, if others are watching it, they will rearm */
2641 inotify_rm_watch (fs_fd, wd);
2642}
2643
2644static void noinline
2645infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2646{
2647 if (slot < 0)
2648 /* overflow, need to check for all hash slots */
2649 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2650 infy_wd (EV_A_ slot, wd, ev);
2651 else
2652 {
2653 WL w_;
2654
2655 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2656 {
2657 ev_stat *w = (ev_stat *)w_;
2658 w_ = w_->next; /* lets us remove this watcher and all before it */
2659
2660 if (w->wd == wd || wd == -1)
2661 {
2662 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2663 {
2664 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2665 w->wd = -1;
2666 infy_add (EV_A_ w); /* re-add, no matter what */
2667 }
2668
2669 stat_timer_cb (EV_A_ &w->timer, 0);
2670 }
2671 }
2672 }
2673}
2674
2675static void
2676infy_cb (EV_P_ ev_io *w, int revents)
2677{
2678 char buf [EV_INOTIFY_BUFSIZE];
2679 struct inotify_event *ev = (struct inotify_event *)buf;
2680 int ofs;
2681 int len = read (fs_fd, buf, sizeof (buf));
2682
2683 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2684 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2685}
2686
2687inline_size void
2688check_2625 (EV_P)
2689{
2690 /* kernels < 2.6.25 are borked
2691 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2692 */
2693 struct utsname buf;
2694 int major, minor, micro;
2695
2696 if (uname (&buf))
2697 return;
2698
2699 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2700 return;
2701
2702 if (major < 2
2703 || (major == 2 && minor < 6)
2704 || (major == 2 && minor == 6 && micro < 25))
2705 return;
2706
2707 fs_2625 = 1;
2708}
2709
2710inline_size void
2711infy_init (EV_P)
2712{
2713 if (fs_fd != -2)
2714 return;
2715
2716 fs_fd = -1;
2717
2718 check_2625 (EV_A);
2719
2720 fs_fd = inotify_init ();
2721
2722 if (fs_fd >= 0)
2723 {
2724 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2725 ev_set_priority (&fs_w, EV_MAXPRI);
2726 ev_io_start (EV_A_ &fs_w);
2727 }
2728}
2729
2730inline_size void
2731infy_fork (EV_P)
2732{
2733 int slot;
2734
2735 if (fs_fd < 0)
2736 return;
2737
2738 close (fs_fd);
2739 fs_fd = inotify_init ();
2740
2741 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2742 {
2743 WL w_ = fs_hash [slot].head;
2744 fs_hash [slot].head = 0;
2745
2746 while (w_)
2747 {
2748 ev_stat *w = (ev_stat *)w_;
2749 w_ = w_->next; /* lets us add this watcher */
2750
2751 w->wd = -1;
2752
2753 if (fs_fd >= 0)
2754 infy_add (EV_A_ w); /* re-add, no matter what */
2755 else
2756 ev_timer_again (EV_A_ &w->timer);
2757 }
2758 }
2759}
2760
2761#endif
2762
2763#ifdef _WIN32
2764# define EV_LSTAT(p,b) _stati64 (p, b)
2765#else
2766# define EV_LSTAT(p,b) lstat (p, b)
2767#endif
2768
2769void
2770ev_stat_stat (EV_P_ ev_stat *w)
2771{
2772 if (lstat (w->path, &w->attr) < 0)
2773 w->attr.st_nlink = 0;
2774 else if (!w->attr.st_nlink)
2775 w->attr.st_nlink = 1;
2776}
2777
2778static void noinline
2779stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2780{
2781 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2782
2783 /* we copy this here each the time so that */
2784 /* prev has the old value when the callback gets invoked */
2785 w->prev = w->attr;
2786 ev_stat_stat (EV_A_ w);
2787
2788 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2789 if (
2790 w->prev.st_dev != w->attr.st_dev
2791 || w->prev.st_ino != w->attr.st_ino
2792 || w->prev.st_mode != w->attr.st_mode
2793 || w->prev.st_nlink != w->attr.st_nlink
2794 || w->prev.st_uid != w->attr.st_uid
2795 || w->prev.st_gid != w->attr.st_gid
2796 || w->prev.st_rdev != w->attr.st_rdev
2797 || w->prev.st_size != w->attr.st_size
2798 || w->prev.st_atime != w->attr.st_atime
2799 || w->prev.st_mtime != w->attr.st_mtime
2800 || w->prev.st_ctime != w->attr.st_ctime
2801 ) {
2802 #if EV_USE_INOTIFY
2803 if (fs_fd >= 0)
2804 {
2805 infy_del (EV_A_ w);
2806 infy_add (EV_A_ w);
2807 ev_stat_stat (EV_A_ w); /* avoid race... */
2808 }
2809 #endif
2810
2811 ev_feed_event (EV_A_ w, EV_STAT);
2812 }
2813}
2814
2815void
2816ev_stat_start (EV_P_ ev_stat *w)
2817{
2818 if (expect_false (ev_is_active (w)))
2819 return;
2820
2821 ev_stat_stat (EV_A_ w);
2822
2823 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2824 w->interval = MIN_STAT_INTERVAL;
2825
2826 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2827 ev_set_priority (&w->timer, ev_priority (w));
2828
2829#if EV_USE_INOTIFY
2830 infy_init (EV_A);
2831
2832 if (fs_fd >= 0)
2833 infy_add (EV_A_ w);
2834 else
2835#endif
2836 ev_timer_again (EV_A_ &w->timer);
2837
2838 ev_start (EV_A_ (W)w, 1);
2839
2840 EV_FREQUENT_CHECK;
2841}
2842
2843void
2844ev_stat_stop (EV_P_ ev_stat *w)
2845{
2846 clear_pending (EV_A_ (W)w);
2847 if (expect_false (!ev_is_active (w)))
2848 return;
2849
2850 EV_FREQUENT_CHECK;
2851
2852#if EV_USE_INOTIFY
2853 infy_del (EV_A_ w);
2854#endif
2855 ev_timer_stop (EV_A_ &w->timer);
2856
2857 ev_stop (EV_A_ (W)w);
2858
2859 EV_FREQUENT_CHECK;
2860}
2861#endif
2862
2863#if EV_IDLE_ENABLE
2864void
2865ev_idle_start (EV_P_ ev_idle *w)
2866{
2867 if (expect_false (ev_is_active (w)))
2868 return;
2869
2870 pri_adjust (EV_A_ (W)w);
2871
2872 EV_FREQUENT_CHECK;
2873
2874 {
2875 int active = ++idlecnt [ABSPRI (w)];
2876
2877 ++idleall;
2878 ev_start (EV_A_ (W)w, active);
2879
2880 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2881 idles [ABSPRI (w)][active - 1] = w;
2882 }
2883
2884 EV_FREQUENT_CHECK;
2885}
2886
2887void
2888ev_idle_stop (EV_P_ ev_idle *w)
2889{
2890 clear_pending (EV_A_ (W)w);
2891 if (expect_false (!ev_is_active (w)))
2892 return;
2893
2894 EV_FREQUENT_CHECK;
2895
2896 {
2897 int active = ev_active (w);
2898
2899 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2900 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2901
2902 ev_stop (EV_A_ (W)w);
2903 --idleall;
2904 }
2905
2906 EV_FREQUENT_CHECK;
2907}
2908#endif
2909
2910void
2911ev_prepare_start (EV_P_ ev_prepare *w)
2912{
2913 if (expect_false (ev_is_active (w)))
2914 return;
2915
2916 EV_FREQUENT_CHECK;
2917
1116 ev_start (EV_A_ (W)w, ++preparecnt); 2918 ev_start (EV_A_ (W)w, ++preparecnt);
1117 array_needsize (prepares, preparemax, preparecnt, ); 2919 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1118 prepares [preparecnt - 1] = w; 2920 prepares [preparecnt - 1] = w;
1119}
1120 2921
2922 EV_FREQUENT_CHECK;
2923}
2924
1121void 2925void
1122ev_prepare_stop (EV_P_ struct ev_prepare *w) 2926ev_prepare_stop (EV_P_ ev_prepare *w)
1123{ 2927{
1124 ev_clear_pending (EV_A_ (W)w); 2928 clear_pending (EV_A_ (W)w);
1125 if (ev_is_active (w)) 2929 if (expect_false (!ev_is_active (w)))
1126 return; 2930 return;
1127 2931
2932 EV_FREQUENT_CHECK;
2933
2934 {
2935 int active = ev_active (w);
2936
1128 prepares [w->active - 1] = prepares [--preparecnt]; 2937 prepares [active - 1] = prepares [--preparecnt];
2938 ev_active (prepares [active - 1]) = active;
2939 }
2940
1129 ev_stop (EV_A_ (W)w); 2941 ev_stop (EV_A_ (W)w);
1130}
1131 2942
2943 EV_FREQUENT_CHECK;
2944}
2945
1132void 2946void
1133ev_check_start (EV_P_ struct ev_check *w) 2947ev_check_start (EV_P_ ev_check *w)
1134{ 2948{
1135 if (ev_is_active (w)) 2949 if (expect_false (ev_is_active (w)))
1136 return; 2950 return;
1137 2951
2952 EV_FREQUENT_CHECK;
2953
1138 ev_start (EV_A_ (W)w, ++checkcnt); 2954 ev_start (EV_A_ (W)w, ++checkcnt);
1139 array_needsize (checks, checkmax, checkcnt, ); 2955 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1140 checks [checkcnt - 1] = w; 2956 checks [checkcnt - 1] = w;
1141}
1142 2957
2958 EV_FREQUENT_CHECK;
2959}
2960
1143void 2961void
1144ev_check_stop (EV_P_ struct ev_check *w) 2962ev_check_stop (EV_P_ ev_check *w)
1145{ 2963{
1146 ev_clear_pending (EV_A_ (W)w); 2964 clear_pending (EV_A_ (W)w);
1147 if (ev_is_active (w)) 2965 if (expect_false (!ev_is_active (w)))
1148 return; 2966 return;
1149 2967
2968 EV_FREQUENT_CHECK;
2969
2970 {
2971 int active = ev_active (w);
2972
1150 checks [w->active - 1] = checks [--checkcnt]; 2973 checks [active - 1] = checks [--checkcnt];
2974 ev_active (checks [active - 1]) = active;
2975 }
2976
1151 ev_stop (EV_A_ (W)w); 2977 ev_stop (EV_A_ (W)w);
1152}
1153 2978
1154void 2979 EV_FREQUENT_CHECK;
1155ev_child_start (EV_P_ struct ev_child *w) 2980}
2981
2982#if EV_EMBED_ENABLE
2983void noinline
2984ev_embed_sweep (EV_P_ ev_embed *w)
1156{ 2985{
2986 ev_loop (w->other, EVLOOP_NONBLOCK);
2987}
2988
2989static void
2990embed_io_cb (EV_P_ ev_io *io, int revents)
2991{
2992 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2993
1157 if (ev_is_active (w)) 2994 if (ev_cb (w))
2995 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2996 else
2997 ev_loop (w->other, EVLOOP_NONBLOCK);
2998}
2999
3000static void
3001embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3002{
3003 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3004
3005 {
3006 struct ev_loop *loop = w->other;
3007
3008 while (fdchangecnt)
3009 {
3010 fd_reify (EV_A);
3011 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3012 }
3013 }
3014}
3015
3016static void
3017embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3018{
3019 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3020
3021 ev_embed_stop (EV_A_ w);
3022
3023 {
3024 struct ev_loop *loop = w->other;
3025
3026 ev_loop_fork (EV_A);
3027 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3028 }
3029
3030 ev_embed_start (EV_A_ w);
3031}
3032
3033#if 0
3034static void
3035embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3036{
3037 ev_idle_stop (EV_A_ idle);
3038}
3039#endif
3040
3041void
3042ev_embed_start (EV_P_ ev_embed *w)
3043{
3044 if (expect_false (ev_is_active (w)))
1158 return; 3045 return;
1159 3046
3047 {
3048 struct ev_loop *loop = w->other;
3049 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3050 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3051 }
3052
3053 EV_FREQUENT_CHECK;
3054
3055 ev_set_priority (&w->io, ev_priority (w));
3056 ev_io_start (EV_A_ &w->io);
3057
3058 ev_prepare_init (&w->prepare, embed_prepare_cb);
3059 ev_set_priority (&w->prepare, EV_MINPRI);
3060 ev_prepare_start (EV_A_ &w->prepare);
3061
3062 ev_fork_init (&w->fork, embed_fork_cb);
3063 ev_fork_start (EV_A_ &w->fork);
3064
3065 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3066
1160 ev_start (EV_A_ (W)w, 1); 3067 ev_start (EV_A_ (W)w, 1);
1161 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1162}
1163 3068
3069 EV_FREQUENT_CHECK;
3070}
3071
1164void 3072void
1165ev_child_stop (EV_P_ struct ev_child *w) 3073ev_embed_stop (EV_P_ ev_embed *w)
1166{ 3074{
1167 ev_clear_pending (EV_A_ (W)w); 3075 clear_pending (EV_A_ (W)w);
1168 if (ev_is_active (w)) 3076 if (expect_false (!ev_is_active (w)))
1169 return; 3077 return;
1170 3078
1171 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 3079 EV_FREQUENT_CHECK;
3080
3081 ev_io_stop (EV_A_ &w->io);
3082 ev_prepare_stop (EV_A_ &w->prepare);
3083 ev_fork_stop (EV_A_ &w->fork);
3084
3085 EV_FREQUENT_CHECK;
3086}
3087#endif
3088
3089#if EV_FORK_ENABLE
3090void
3091ev_fork_start (EV_P_ ev_fork *w)
3092{
3093 if (expect_false (ev_is_active (w)))
3094 return;
3095
3096 EV_FREQUENT_CHECK;
3097
3098 ev_start (EV_A_ (W)w, ++forkcnt);
3099 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3100 forks [forkcnt - 1] = w;
3101
3102 EV_FREQUENT_CHECK;
3103}
3104
3105void
3106ev_fork_stop (EV_P_ ev_fork *w)
3107{
3108 clear_pending (EV_A_ (W)w);
3109 if (expect_false (!ev_is_active (w)))
3110 return;
3111
3112 EV_FREQUENT_CHECK;
3113
3114 {
3115 int active = ev_active (w);
3116
3117 forks [active - 1] = forks [--forkcnt];
3118 ev_active (forks [active - 1]) = active;
3119 }
3120
1172 ev_stop (EV_A_ (W)w); 3121 ev_stop (EV_A_ (W)w);
3122
3123 EV_FREQUENT_CHECK;
1173} 3124}
3125#endif
3126
3127#if EV_ASYNC_ENABLE
3128void
3129ev_async_start (EV_P_ ev_async *w)
3130{
3131 if (expect_false (ev_is_active (w)))
3132 return;
3133
3134 evpipe_init (EV_A);
3135
3136 EV_FREQUENT_CHECK;
3137
3138 ev_start (EV_A_ (W)w, ++asynccnt);
3139 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3140 asyncs [asynccnt - 1] = w;
3141
3142 EV_FREQUENT_CHECK;
3143}
3144
3145void
3146ev_async_stop (EV_P_ ev_async *w)
3147{
3148 clear_pending (EV_A_ (W)w);
3149 if (expect_false (!ev_is_active (w)))
3150 return;
3151
3152 EV_FREQUENT_CHECK;
3153
3154 {
3155 int active = ev_active (w);
3156
3157 asyncs [active - 1] = asyncs [--asynccnt];
3158 ev_active (asyncs [active - 1]) = active;
3159 }
3160
3161 ev_stop (EV_A_ (W)w);
3162
3163 EV_FREQUENT_CHECK;
3164}
3165
3166void
3167ev_async_send (EV_P_ ev_async *w)
3168{
3169 w->sent = 1;
3170 evpipe_write (EV_A_ &gotasync);
3171}
3172#endif
1174 3173
1175/*****************************************************************************/ 3174/*****************************************************************************/
1176 3175
1177struct ev_once 3176struct ev_once
1178{ 3177{
1179 struct ev_io io; 3178 ev_io io;
1180 struct ev_timer to; 3179 ev_timer to;
1181 void (*cb)(int revents, void *arg); 3180 void (*cb)(int revents, void *arg);
1182 void *arg; 3181 void *arg;
1183}; 3182};
1184 3183
1185static void 3184static void
1186once_cb (EV_P_ struct ev_once *once, int revents) 3185once_cb (EV_P_ struct ev_once *once, int revents)
1187{ 3186{
1188 void (*cb)(int revents, void *arg) = once->cb; 3187 void (*cb)(int revents, void *arg) = once->cb;
1189 void *arg = once->arg; 3188 void *arg = once->arg;
1190 3189
1191 ev_io_stop (EV_A_ &once->io); 3190 ev_io_stop (EV_A_ &once->io);
1192 ev_timer_stop (EV_A_ &once->to); 3191 ev_timer_stop (EV_A_ &once->to);
1193 free (once); 3192 ev_free (once);
1194 3193
1195 cb (revents, arg); 3194 cb (revents, arg);
1196} 3195}
1197 3196
1198static void 3197static void
1199once_cb_io (EV_P_ struct ev_io *w, int revents) 3198once_cb_io (EV_P_ ev_io *w, int revents)
1200{ 3199{
1201 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3200 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3201
3202 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1202} 3203}
1203 3204
1204static void 3205static void
1205once_cb_to (EV_P_ struct ev_timer *w, int revents) 3206once_cb_to (EV_P_ ev_timer *w, int revents)
1206{ 3207{
1207 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3208 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3209
3210 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1208} 3211}
1209 3212
1210void 3213void
1211ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3214ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1212{ 3215{
1213 struct ev_once *once = malloc (sizeof (struct ev_once)); 3216 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1214 3217
1215 if (!once) 3218 if (expect_false (!once))
3219 {
1216 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3220 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1217 else 3221 return;
1218 { 3222 }
3223
1219 once->cb = cb; 3224 once->cb = cb;
1220 once->arg = arg; 3225 once->arg = arg;
1221 3226
1222 ev_watcher_init (&once->io, once_cb_io); 3227 ev_init (&once->io, once_cb_io);
1223 if (fd >= 0) 3228 if (fd >= 0)
3229 {
3230 ev_io_set (&once->io, fd, events);
3231 ev_io_start (EV_A_ &once->io);
3232 }
3233
3234 ev_init (&once->to, once_cb_to);
3235 if (timeout >= 0.)
3236 {
3237 ev_timer_set (&once->to, timeout, 0.);
3238 ev_timer_start (EV_A_ &once->to);
3239 }
3240}
3241
3242/*****************************************************************************/
3243
3244#if EV_WALK_ENABLE
3245void
3246ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3247{
3248 int i, j;
3249 ev_watcher_list *wl, *wn;
3250
3251 if (types & (EV_IO | EV_EMBED))
3252 for (i = 0; i < anfdmax; ++i)
3253 for (wl = anfds [i].head; wl; )
1224 { 3254 {
1225 ev_io_set (&once->io, fd, events); 3255 wn = wl->next;
1226 ev_io_start (EV_A_ &once->io); 3256
3257#if EV_EMBED_ENABLE
3258 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3259 {
3260 if (types & EV_EMBED)
3261 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3262 }
3263 else
3264#endif
3265#if EV_USE_INOTIFY
3266 if (ev_cb ((ev_io *)wl) == infy_cb)
3267 ;
3268 else
3269#endif
3270 if ((ev_io *)wl != &pipe_w)
3271 if (types & EV_IO)
3272 cb (EV_A_ EV_IO, wl);
3273
3274 wl = wn;
1227 } 3275 }
1228 3276
1229 ev_watcher_init (&once->to, once_cb_to); 3277 if (types & (EV_TIMER | EV_STAT))
1230 if (timeout >= 0.) 3278 for (i = timercnt + HEAP0; i-- > HEAP0; )
3279#if EV_STAT_ENABLE
3280 /*TODO: timer is not always active*/
3281 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1231 { 3282 {
1232 ev_timer_set (&once->to, timeout, 0.); 3283 if (types & EV_STAT)
1233 ev_timer_start (EV_A_ &once->to); 3284 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1234 } 3285 }
1235 } 3286 else
1236} 3287#endif
3288 if (types & EV_TIMER)
3289 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1237 3290
1238/*****************************************************************************/ 3291#if EV_PERIODIC_ENABLE
3292 if (types & EV_PERIODIC)
3293 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3294 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3295#endif
1239 3296
1240#if 0 3297#if EV_IDLE_ENABLE
3298 if (types & EV_IDLE)
3299 for (j = NUMPRI; i--; )
3300 for (i = idlecnt [j]; i--; )
3301 cb (EV_A_ EV_IDLE, idles [j][i]);
3302#endif
1241 3303
1242struct ev_io wio; 3304#if EV_FORK_ENABLE
3305 if (types & EV_FORK)
3306 for (i = forkcnt; i--; )
3307 if (ev_cb (forks [i]) != embed_fork_cb)
3308 cb (EV_A_ EV_FORK, forks [i]);
3309#endif
1243 3310
1244static void 3311#if EV_ASYNC_ENABLE
1245sin_cb (struct ev_io *w, int revents) 3312 if (types & EV_ASYNC)
1246{ 3313 for (i = asynccnt; i--; )
1247 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 3314 cb (EV_A_ EV_ASYNC, asyncs [i]);
1248} 3315#endif
1249 3316
1250static void 3317 if (types & EV_PREPARE)
1251ocb (struct ev_timer *w, int revents) 3318 for (i = preparecnt; i--; )
1252{ 3319#if EV_EMBED_ENABLE
1253 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 3320 if (ev_cb (prepares [i]) != embed_prepare_cb)
1254 ev_timer_stop (w); 3321#endif
1255 ev_timer_start (w); 3322 cb (EV_A_ EV_PREPARE, prepares [i]);
1256}
1257 3323
1258static void 3324 if (types & EV_CHECK)
1259scb (struct ev_signal *w, int revents) 3325 for (i = checkcnt; i--; )
1260{ 3326 cb (EV_A_ EV_CHECK, checks [i]);
1261 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1262 ev_io_stop (&wio);
1263 ev_io_start (&wio);
1264}
1265 3327
1266static void 3328 if (types & EV_SIGNAL)
1267gcb (struct ev_signal *w, int revents)
1268{
1269 fprintf (stderr, "generic %x\n", revents);
1270
1271}
1272
1273int main (void)
1274{
1275 ev_init (0);
1276
1277 ev_io_init (&wio, sin_cb, 0, EV_READ);
1278 ev_io_start (&wio);
1279
1280 struct ev_timer t[10000];
1281
1282#if 0
1283 int i;
1284 for (i = 0; i < 10000; ++i) 3329 for (i = 0; i < signalmax; ++i)
1285 { 3330 for (wl = signals [i].head; wl; )
1286 struct ev_timer *w = t + i; 3331 {
1287 ev_watcher_init (w, ocb, i); 3332 wn = wl->next;
1288 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533); 3333 cb (EV_A_ EV_SIGNAL, wl);
1289 ev_timer_start (w); 3334 wl = wn;
1290 if (drand48 () < 0.5) 3335 }
1291 ev_timer_stop (w);
1292 }
1293#endif
1294 3336
1295 struct ev_timer t1; 3337 if (types & EV_CHILD)
1296 ev_timer_init (&t1, ocb, 5, 10); 3338 for (i = EV_PID_HASHSIZE; i--; )
1297 ev_timer_start (&t1); 3339 for (wl = childs [i]; wl; )
1298 3340 {
1299 struct ev_signal sig; 3341 wn = wl->next;
1300 ev_signal_init (&sig, scb, SIGQUIT); 3342 cb (EV_A_ EV_CHILD, wl);
1301 ev_signal_start (&sig); 3343 wl = wn;
1302 3344 }
1303 struct ev_check cw; 3345/* EV_STAT 0x00001000 /* stat data changed */
1304 ev_check_init (&cw, gcb); 3346/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
1305 ev_check_start (&cw);
1306
1307 struct ev_idle iw;
1308 ev_idle_init (&iw, gcb);
1309 ev_idle_start (&iw);
1310
1311 ev_loop (0);
1312
1313 return 0;
1314} 3347}
1315
1316#endif 3348#endif
1317 3349
3350#if EV_MULTIPLICITY
3351 #include "ev_wrap.h"
3352#endif
1318 3353
3354#ifdef __cplusplus
3355}
3356#endif
1319 3357
1320

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