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Comparing libev/ev.c (file contents):
Revision 1.42 by root, Fri Nov 2 20:05:05 2007 UTC vs.
Revision 1.261 by root, Mon Sep 29 03:31:14 2008 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 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE
31#if EV_USE_CONFIG_H 46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
32# include "config.h" 49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC
54# define EV_USE_MONOTONIC 1
55# endif
56# ifndef EV_USE_REALTIME
57# define EV_USE_REALTIME 1
58# endif
59# else
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0
62# endif
63# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0
65# endif
66# endif
67
68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
73# endif
74# endif
75
76# ifndef EV_USE_SELECT
77# if HAVE_SELECT && HAVE_SYS_SELECT_H
78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif
82# endif
83
84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
86# define EV_USE_POLL 1
87# else
88# define EV_USE_POLL 0
89# endif
90# endif
91
92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94# define EV_USE_EPOLL 1
95# else
96# define EV_USE_EPOLL 0
97# endif
98# endif
99
100# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif
106# endif
107
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1
111# else
112# define EV_USE_PORT 0
113# endif
114# endif
115
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1
119# else
120# define EV_USE_INOTIFY 0
121# endif
122# endif
123
124# ifndef EV_USE_EVENTFD
125# if HAVE_EVENTFD
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif
130# endif
131
33#endif 132#endif
34 133
35#include <math.h> 134#include <math.h>
36#include <stdlib.h> 135#include <stdlib.h>
37#include <unistd.h>
38#include <fcntl.h> 136#include <fcntl.h>
39#include <signal.h>
40#include <stddef.h> 137#include <stddef.h>
41 138
42#include <stdio.h> 139#include <stdio.h>
43 140
44#include <assert.h> 141#include <assert.h>
45#include <errno.h> 142#include <errno.h>
46#include <sys/types.h> 143#include <sys/types.h>
47#include <sys/wait.h>
48#include <sys/time.h>
49#include <time.h> 144#include <time.h>
50 145
51/**/ 146#include <signal.h>
147
148#ifdef EV_H
149# include EV_H
150#else
151# include "ev.h"
152#endif
153
154#ifndef _WIN32
155# include <sys/time.h>
156# include <sys/wait.h>
157# include <unistd.h>
158#else
159# include <io.h>
160# define WIN32_LEAN_AND_MEAN
161# include <windows.h>
162# ifndef EV_SELECT_IS_WINSOCKET
163# define EV_SELECT_IS_WINSOCKET 1
164# endif
165#endif
166
167/* this block tries to deduce configuration from header-defined symbols and defaults */
52 168
53#ifndef EV_USE_MONOTONIC 169#ifndef EV_USE_MONOTONIC
170# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
54# define EV_USE_MONOTONIC 1 171# define EV_USE_MONOTONIC 1
172# else
173# define EV_USE_MONOTONIC 0
174# endif
175#endif
176
177#ifndef EV_USE_REALTIME
178# define EV_USE_REALTIME 0
179#endif
180
181#ifndef EV_USE_NANOSLEEP
182# if _POSIX_C_SOURCE >= 199309L
183# define EV_USE_NANOSLEEP 1
184# else
185# define EV_USE_NANOSLEEP 0
186# endif
55#endif 187#endif
56 188
57#ifndef EV_USE_SELECT 189#ifndef EV_USE_SELECT
58# define EV_USE_SELECT 1 190# define EV_USE_SELECT 1
59#endif 191#endif
60 192
61#ifndef EV_USE_POLL 193#ifndef EV_USE_POLL
62# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ 194# ifdef _WIN32
195# define EV_USE_POLL 0
196# else
197# define EV_USE_POLL 1
198# endif
63#endif 199#endif
64 200
65#ifndef EV_USE_EPOLL 201#ifndef EV_USE_EPOLL
202# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
203# define EV_USE_EPOLL 1
204# else
66# define EV_USE_EPOLL 0 205# define EV_USE_EPOLL 0
67#endif 206# endif
207#endif
68 208
209#ifndef EV_USE_KQUEUE
210# define EV_USE_KQUEUE 0
211#endif
212
69#ifndef EV_USE_REALTIME 213#ifndef EV_USE_PORT
214# define EV_USE_PORT 0
215#endif
216
217#ifndef EV_USE_INOTIFY
218# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
70# define EV_USE_REALTIME 1 219# define EV_USE_INOTIFY 1
220# else
221# define EV_USE_INOTIFY 0
71#endif 222# endif
223#endif
72 224
73/**/ 225#ifndef EV_PID_HASHSIZE
226# if EV_MINIMAL
227# define EV_PID_HASHSIZE 1
228# else
229# define EV_PID_HASHSIZE 16
230# endif
231#endif
232
233#ifndef EV_INOTIFY_HASHSIZE
234# if EV_MINIMAL
235# define EV_INOTIFY_HASHSIZE 1
236# else
237# define EV_INOTIFY_HASHSIZE 16
238# endif
239#endif
240
241#ifndef EV_USE_EVENTFD
242# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
243# define EV_USE_EVENTFD 1
244# else
245# define EV_USE_EVENTFD 0
246# endif
247#endif
248
249#if 0 /* debugging */
250# define EV_VERIFY 3
251# define EV_USE_4HEAP 1
252# define EV_HEAP_CACHE_AT 1
253#endif
254
255#ifndef EV_VERIFY
256# define EV_VERIFY !EV_MINIMAL
257#endif
258
259#ifndef EV_USE_4HEAP
260# define EV_USE_4HEAP !EV_MINIMAL
261#endif
262
263#ifndef EV_HEAP_CACHE_AT
264# define EV_HEAP_CACHE_AT !EV_MINIMAL
265#endif
266
267/* this block fixes any misconfiguration where we know we run into trouble otherwise */
74 268
75#ifndef CLOCK_MONOTONIC 269#ifndef CLOCK_MONOTONIC
76# undef EV_USE_MONOTONIC 270# undef EV_USE_MONOTONIC
77# define EV_USE_MONOTONIC 0 271# define EV_USE_MONOTONIC 0
78#endif 272#endif
… …
80#ifndef CLOCK_REALTIME 274#ifndef CLOCK_REALTIME
81# undef EV_USE_REALTIME 275# undef EV_USE_REALTIME
82# define EV_USE_REALTIME 0 276# define EV_USE_REALTIME 0
83#endif 277#endif
84 278
279#if !EV_STAT_ENABLE
280# undef EV_USE_INOTIFY
281# define EV_USE_INOTIFY 0
282#endif
283
284#if !EV_USE_NANOSLEEP
285# ifndef _WIN32
286# include <sys/select.h>
287# endif
288#endif
289
290#if EV_USE_INOTIFY
291# include <sys/inotify.h>
292#endif
293
294#if EV_SELECT_IS_WINSOCKET
295# include <winsock.h>
296#endif
297
298#if EV_USE_EVENTFD
299/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
300# include <stdint.h>
301# ifdef __cplusplus
302extern "C" {
303# endif
304int eventfd (unsigned int initval, int flags);
305# ifdef __cplusplus
306}
307# endif
308#endif
309
85/**/ 310/**/
86 311
312#if EV_VERIFY >= 3
313# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
314#else
315# define EV_FREQUENT_CHECK do { } while (0)
316#endif
317
318/*
319 * This is used to avoid floating point rounding problems.
320 * It is added to ev_rt_now when scheduling periodics
321 * to ensure progress, time-wise, even when rounding
322 * errors are against us.
323 * This value is good at least till the year 4000.
324 * Better solutions welcome.
325 */
326#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
327
87#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 328#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
88#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 329#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
89#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
90/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ 330/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
91 331
92#include "ev.h"
93
94#if __GNUC__ >= 3 332#if __GNUC__ >= 4
95# define expect(expr,value) __builtin_expect ((expr),(value)) 333# define expect(expr,value) __builtin_expect ((expr),(value))
96# define inline inline 334# define noinline __attribute__ ((noinline))
97#else 335#else
98# define expect(expr,value) (expr) 336# define expect(expr,value) (expr)
99# define inline static 337# define noinline
338# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
339# define inline
340# endif
100#endif 341#endif
101 342
102#define expect_false(expr) expect ((expr) != 0, 0) 343#define expect_false(expr) expect ((expr) != 0, 0)
103#define expect_true(expr) expect ((expr) != 0, 1) 344#define expect_true(expr) expect ((expr) != 0, 1)
345#define inline_size static inline
346
347#if EV_MINIMAL
348# define inline_speed static noinline
349#else
350# define inline_speed static inline
351#endif
104 352
105#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 353#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
106#define ABSPRI(w) ((w)->priority - EV_MINPRI) 354#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
107 355
356#define EMPTY /* required for microsofts broken pseudo-c compiler */
357#define EMPTY2(a,b) /* used to suppress some warnings */
358
108typedef struct ev_watcher *W; 359typedef ev_watcher *W;
109typedef struct ev_watcher_list *WL; 360typedef ev_watcher_list *WL;
110typedef struct ev_watcher_time *WT; 361typedef ev_watcher_time *WT;
111 362
112static ev_tstamp now_floor, now, diff; /* monotonic clock */ 363#define ev_active(w) ((W)(w))->active
364#define ev_at(w) ((WT)(w))->at
365
366#if EV_USE_MONOTONIC
367/* sig_atomic_t is used to avoid per-thread variables or locking but still */
368/* giving it a reasonably high chance of working on typical architetcures */
369static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
370#endif
371
372#ifdef _WIN32
373# include "ev_win32.c"
374#endif
375
376/*****************************************************************************/
377
378static void (*syserr_cb)(const char *msg);
379
380void
381ev_set_syserr_cb (void (*cb)(const char *msg))
382{
383 syserr_cb = cb;
384}
385
386static void noinline
387syserr (const char *msg)
388{
389 if (!msg)
390 msg = "(libev) system error";
391
392 if (syserr_cb)
393 syserr_cb (msg);
394 else
395 {
396 perror (msg);
397 abort ();
398 }
399}
400
401static void *
402ev_realloc_emul (void *ptr, long size)
403{
404 /* some systems, notably openbsd and darwin, fail to properly
405 * implement realloc (x, 0) (as required by both ansi c-98 and
406 * the single unix specification, so work around them here.
407 */
408
409 if (size)
410 return realloc (ptr, size);
411
412 free (ptr);
413 return 0;
414}
415
416static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
417
418void
419ev_set_allocator (void *(*cb)(void *ptr, long size))
420{
421 alloc = cb;
422}
423
424inline_speed void *
425ev_realloc (void *ptr, long size)
426{
427 ptr = alloc (ptr, size);
428
429 if (!ptr && size)
430 {
431 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
432 abort ();
433 }
434
435 return ptr;
436}
437
438#define ev_malloc(size) ev_realloc (0, (size))
439#define ev_free(ptr) ev_realloc ((ptr), 0)
440
441/*****************************************************************************/
442
443typedef struct
444{
445 WL head;
446 unsigned char events;
447 unsigned char reify;
448#if EV_SELECT_IS_WINSOCKET
449 SOCKET handle;
450#endif
451} ANFD;
452
453typedef struct
454{
455 W w;
456 int events;
457} ANPENDING;
458
459#if EV_USE_INOTIFY
460/* hash table entry per inotify-id */
461typedef struct
462{
463 WL head;
464} ANFS;
465#endif
466
467/* Heap Entry */
468#if EV_HEAP_CACHE_AT
469 typedef struct {
470 ev_tstamp at;
471 WT w;
472 } ANHE;
473
474 #define ANHE_w(he) (he).w /* access watcher, read-write */
475 #define ANHE_at(he) (he).at /* access cached at, read-only */
476 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
477#else
478 typedef WT ANHE;
479
480 #define ANHE_w(he) (he)
481 #define ANHE_at(he) (he)->at
482 #define ANHE_at_cache(he)
483#endif
484
485#if EV_MULTIPLICITY
486
487 struct ev_loop
488 {
489 ev_tstamp ev_rt_now;
490 #define ev_rt_now ((loop)->ev_rt_now)
491 #define VAR(name,decl) decl;
492 #include "ev_vars.h"
493 #undef VAR
494 };
495 #include "ev_wrap.h"
496
497 static struct ev_loop default_loop_struct;
498 struct ev_loop *ev_default_loop_ptr;
499
500#else
501
113ev_tstamp ev_now; 502 ev_tstamp ev_rt_now;
114int ev_method; 503 #define VAR(name,decl) static decl;
504 #include "ev_vars.h"
505 #undef VAR
115 506
116static int have_monotonic; /* runtime */ 507 static int ev_default_loop_ptr;
117 508
118static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 509#endif
119static void (*method_modify)(int fd, int oev, int nev);
120static void (*method_poll)(ev_tstamp timeout);
121 510
122/*****************************************************************************/ 511/*****************************************************************************/
123 512
124ev_tstamp 513ev_tstamp
125ev_time (void) 514ev_time (void)
… …
133 gettimeofday (&tv, 0); 522 gettimeofday (&tv, 0);
134 return tv.tv_sec + tv.tv_usec * 1e-6; 523 return tv.tv_sec + tv.tv_usec * 1e-6;
135#endif 524#endif
136} 525}
137 526
138static ev_tstamp 527ev_tstamp inline_size
139get_clock (void) 528get_clock (void)
140{ 529{
141#if EV_USE_MONOTONIC 530#if EV_USE_MONOTONIC
142 if (expect_true (have_monotonic)) 531 if (expect_true (have_monotonic))
143 { 532 {
… …
148#endif 537#endif
149 538
150 return ev_time (); 539 return ev_time ();
151} 540}
152 541
153#define array_roundsize(base,n) ((n) | 4 & ~3) 542#if EV_MULTIPLICITY
543ev_tstamp
544ev_now (EV_P)
545{
546 return ev_rt_now;
547}
548#endif
154 549
155#define array_needsize(base,cur,cnt,init) \ 550void
156 if (expect_false ((cnt) > cur)) \ 551ev_sleep (ev_tstamp delay)
157 { \ 552{
158 int newcnt = cur; \ 553 if (delay > 0.)
159 do \
160 { \
161 newcnt = array_roundsize (base, newcnt << 1); \
162 } \
163 while ((cnt) > newcnt); \
164 \
165 base = realloc (base, sizeof (*base) * (newcnt)); \
166 init (base + cur, newcnt - cur); \
167 cur = newcnt; \
168 } 554 {
555#if EV_USE_NANOSLEEP
556 struct timespec ts;
557
558 ts.tv_sec = (time_t)delay;
559 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
560
561 nanosleep (&ts, 0);
562#elif defined(_WIN32)
563 Sleep ((unsigned long)(delay * 1e3));
564#else
565 struct timeval tv;
566
567 tv.tv_sec = (time_t)delay;
568 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
569
570 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
571 /* somehting nto guaranteed by newer posix versions, but guaranteed */
572 /* by older ones */
573 select (0, 0, 0, 0, &tv);
574#endif
575 }
576}
169 577
170/*****************************************************************************/ 578/*****************************************************************************/
171 579
172typedef struct 580#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
173{
174 struct ev_io *head;
175 unsigned char events;
176 unsigned char reify;
177} ANFD;
178 581
179static ANFD *anfds; 582int inline_size
180static int anfdmax; 583array_nextsize (int elem, int cur, int cnt)
584{
585 int ncur = cur + 1;
181 586
182static void 587 do
588 ncur <<= 1;
589 while (cnt > ncur);
590
591 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
592 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
593 {
594 ncur *= elem;
595 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
596 ncur = ncur - sizeof (void *) * 4;
597 ncur /= elem;
598 }
599
600 return ncur;
601}
602
603static noinline void *
604array_realloc (int elem, void *base, int *cur, int cnt)
605{
606 *cur = array_nextsize (elem, *cur, cnt);
607 return ev_realloc (base, elem * *cur);
608}
609
610#define array_needsize(type,base,cur,cnt,init) \
611 if (expect_false ((cnt) > (cur))) \
612 { \
613 int ocur_ = (cur); \
614 (base) = (type *)array_realloc \
615 (sizeof (type), (base), &(cur), (cnt)); \
616 init ((base) + (ocur_), (cur) - ocur_); \
617 }
618
619#if 0
620#define array_slim(type,stem) \
621 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
622 { \
623 stem ## max = array_roundsize (stem ## cnt >> 1); \
624 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
625 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
626 }
627#endif
628
629#define array_free(stem, idx) \
630 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
631
632/*****************************************************************************/
633
634void noinline
635ev_feed_event (EV_P_ void *w, int revents)
636{
637 W w_ = (W)w;
638 int pri = ABSPRI (w_);
639
640 if (expect_false (w_->pending))
641 pendings [pri][w_->pending - 1].events |= revents;
642 else
643 {
644 w_->pending = ++pendingcnt [pri];
645 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
646 pendings [pri][w_->pending - 1].w = w_;
647 pendings [pri][w_->pending - 1].events = revents;
648 }
649}
650
651void inline_speed
652queue_events (EV_P_ W *events, int eventcnt, int type)
653{
654 int i;
655
656 for (i = 0; i < eventcnt; ++i)
657 ev_feed_event (EV_A_ events [i], type);
658}
659
660/*****************************************************************************/
661
662void inline_size
183anfds_init (ANFD *base, int count) 663anfds_init (ANFD *base, int count)
184{ 664{
185 while (count--) 665 while (count--)
186 { 666 {
187 base->head = 0; 667 base->head = 0;
… …
190 670
191 ++base; 671 ++base;
192 } 672 }
193} 673}
194 674
195typedef struct 675void inline_speed
196{
197 W w;
198 int events;
199} ANPENDING;
200
201static ANPENDING *pendings [NUMPRI];
202static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
203
204static void
205event (W w, int events)
206{
207 if (w->pending)
208 {
209 pendings [ABSPRI (w)][w->pending - 1].events |= events;
210 return;
211 }
212
213 w->pending = ++pendingcnt [ABSPRI (w)];
214 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
215 pendings [ABSPRI (w)][w->pending - 1].w = w;
216 pendings [ABSPRI (w)][w->pending - 1].events = events;
217}
218
219static void
220queue_events (W *events, int eventcnt, int type)
221{
222 int i;
223
224 for (i = 0; i < eventcnt; ++i)
225 event (events [i], type);
226}
227
228static void
229fd_event (int fd, int events) 676fd_event (EV_P_ int fd, int revents)
230{ 677{
231 ANFD *anfd = anfds + fd; 678 ANFD *anfd = anfds + fd;
232 struct ev_io *w; 679 ev_io *w;
233 680
234 for (w = anfd->head; w; w = w->next) 681 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
235 { 682 {
236 int ev = w->events & events; 683 int ev = w->events & revents;
237 684
238 if (ev) 685 if (ev)
239 event ((W)w, ev); 686 ev_feed_event (EV_A_ (W)w, ev);
240 } 687 }
241} 688}
242 689
243/*****************************************************************************/ 690void
691ev_feed_fd_event (EV_P_ int fd, int revents)
692{
693 if (fd >= 0 && fd < anfdmax)
694 fd_event (EV_A_ fd, revents);
695}
244 696
245static int *fdchanges; 697void inline_size
246static int fdchangemax, fdchangecnt; 698fd_reify (EV_P)
247
248static void
249fd_reify (void)
250{ 699{
251 int i; 700 int i;
252 701
253 for (i = 0; i < fdchangecnt; ++i) 702 for (i = 0; i < fdchangecnt; ++i)
254 { 703 {
255 int fd = fdchanges [i]; 704 int fd = fdchanges [i];
256 ANFD *anfd = anfds + fd; 705 ANFD *anfd = anfds + fd;
257 struct ev_io *w; 706 ev_io *w;
258 707
259 int events = 0; 708 unsigned char events = 0;
260 709
261 for (w = anfd->head; w; w = w->next) 710 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
262 events |= w->events; 711 events |= (unsigned char)w->events;
263 712
264 anfd->reify = 0; 713#if EV_SELECT_IS_WINSOCKET
265 714 if (events)
266 if (anfd->events != events)
267 { 715 {
268 method_modify (fd, anfd->events, events); 716 unsigned long arg;
269 anfd->events = events; 717 #ifdef EV_FD_TO_WIN32_HANDLE
718 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
719 #else
720 anfd->handle = _get_osfhandle (fd);
721 #endif
722 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
270 } 723 }
724#endif
725
726 {
727 unsigned char o_events = anfd->events;
728 unsigned char o_reify = anfd->reify;
729
730 anfd->reify = 0;
731 anfd->events = events;
732
733 if (o_events != events || o_reify & EV_IOFDSET)
734 backend_modify (EV_A_ fd, o_events, events);
735 }
271 } 736 }
272 737
273 fdchangecnt = 0; 738 fdchangecnt = 0;
274} 739}
275 740
276static void 741void inline_size
277fd_change (int fd) 742fd_change (EV_P_ int fd, int flags)
278{ 743{
279 if (anfds [fd].reify || fdchangecnt < 0) 744 unsigned char reify = anfds [fd].reify;
280 return;
281
282 anfds [fd].reify = 1; 745 anfds [fd].reify |= flags;
283 746
747 if (expect_true (!reify))
748 {
284 ++fdchangecnt; 749 ++fdchangecnt;
285 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 750 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
286 fdchanges [fdchangecnt - 1] = fd; 751 fdchanges [fdchangecnt - 1] = fd;
752 }
287} 753}
288 754
289static void 755void inline_speed
290fd_kill (int fd) 756fd_kill (EV_P_ int fd)
291{ 757{
292 struct ev_io *w; 758 ev_io *w;
293 759
294 printf ("killing fd %d\n", fd);//D
295 while ((w = anfds [fd].head)) 760 while ((w = (ev_io *)anfds [fd].head))
296 { 761 {
297 ev_io_stop (w); 762 ev_io_stop (EV_A_ w);
298 event ((W)w, EV_ERROR | EV_READ | EV_WRITE); 763 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
299 } 764 }
765}
766
767int inline_size
768fd_valid (int fd)
769{
770#ifdef _WIN32
771 return _get_osfhandle (fd) != -1;
772#else
773 return fcntl (fd, F_GETFD) != -1;
774#endif
300} 775}
301 776
302/* called on EBADF to verify fds */ 777/* called on EBADF to verify fds */
303static void 778static void noinline
304fd_ebadf (void) 779fd_ebadf (EV_P)
305{ 780{
306 int fd; 781 int fd;
307 782
308 for (fd = 0; fd < anfdmax; ++fd) 783 for (fd = 0; fd < anfdmax; ++fd)
309 if (anfds [fd].events) 784 if (anfds [fd].events)
310 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 785 if (!fd_valid (fd) && errno == EBADF)
311 fd_kill (fd); 786 fd_kill (EV_A_ fd);
312} 787}
313 788
314/* called on ENOMEM in select/poll to kill some fds and retry */ 789/* called on ENOMEM in select/poll to kill some fds and retry */
315static void 790static void noinline
316fd_enomem (void) 791fd_enomem (EV_P)
317{ 792{
318 int fd = anfdmax; 793 int fd;
319 794
320 while (fd--) 795 for (fd = anfdmax; fd--; )
321 if (anfds [fd].events) 796 if (anfds [fd].events)
322 { 797 {
323 close (fd);
324 fd_kill (fd); 798 fd_kill (EV_A_ fd);
325 return; 799 return;
326 } 800 }
327} 801}
328 802
803/* usually called after fork if backend needs to re-arm all fds from scratch */
804static void noinline
805fd_rearm_all (EV_P)
806{
807 int fd;
808
809 for (fd = 0; fd < anfdmax; ++fd)
810 if (anfds [fd].events)
811 {
812 anfds [fd].events = 0;
813 fd_change (EV_A_ fd, EV_IOFDSET | 1);
814 }
815}
816
329/*****************************************************************************/ 817/*****************************************************************************/
330 818
331static struct ev_timer **timers; 819/*
332static int timermax, timercnt; 820 * the heap functions want a real array index. array index 0 uis guaranteed to not
821 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
822 * the branching factor of the d-tree.
823 */
333 824
334static struct ev_periodic **periodics; 825/*
335static int periodicmax, periodiccnt; 826 * at the moment we allow libev the luxury of two heaps,
827 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
828 * which is more cache-efficient.
829 * the difference is about 5% with 50000+ watchers.
830 */
831#if EV_USE_4HEAP
336 832
337static void 833#define DHEAP 4
338upheap (WT *timers, int k) 834#define HEAP0 (DHEAP - 1) /* index of first element in heap */
339{ 835#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
340 WT w = timers [k]; 836#define UPHEAP_DONE(p,k) ((p) == (k))
341 837
342 while (k && timers [k >> 1]->at > w->at) 838/* away from the root */
343 { 839void inline_speed
344 timers [k] = timers [k >> 1];
345 timers [k]->active = k + 1;
346 k >>= 1;
347 }
348
349 timers [k] = w;
350 timers [k]->active = k + 1;
351
352}
353
354static void
355downheap (WT *timers, int N, int k) 840downheap (ANHE *heap, int N, int k)
356{ 841{
357 WT w = timers [k]; 842 ANHE he = heap [k];
843 ANHE *E = heap + N + HEAP0;
358 844
359 while (k < (N >> 1)) 845 for (;;)
360 { 846 {
361 int j = k << 1; 847 ev_tstamp minat;
848 ANHE *minpos;
849 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
362 850
363 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 851 /* find minimum child */
852 if (expect_true (pos + DHEAP - 1 < E))
364 ++j; 853 {
365 854 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
366 if (w->at <= timers [j]->at) 855 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
856 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
857 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
858 }
859 else if (pos < E)
860 {
861 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
862 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
863 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
864 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
865 }
866 else
367 break; 867 break;
368 868
369 timers [k] = timers [j]; 869 if (ANHE_at (he) <= minat)
370 timers [k]->active = k + 1; 870 break;
871
872 heap [k] = *minpos;
873 ev_active (ANHE_w (*minpos)) = k;
874
875 k = minpos - heap;
876 }
877
878 heap [k] = he;
879 ev_active (ANHE_w (he)) = k;
880}
881
882#else /* 4HEAP */
883
884#define HEAP0 1
885#define HPARENT(k) ((k) >> 1)
886#define UPHEAP_DONE(p,k) (!(p))
887
888/* away from the root */
889void inline_speed
890downheap (ANHE *heap, int N, int k)
891{
892 ANHE he = heap [k];
893
894 for (;;)
895 {
896 int c = k << 1;
897
898 if (c > N + HEAP0 - 1)
899 break;
900
901 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
902 ? 1 : 0;
903
904 if (ANHE_at (he) <= ANHE_at (heap [c]))
905 break;
906
907 heap [k] = heap [c];
908 ev_active (ANHE_w (heap [k])) = k;
909
371 k = j; 910 k = c;
911 }
912
913 heap [k] = he;
914 ev_active (ANHE_w (he)) = k;
915}
916#endif
917
918/* towards the root */
919void inline_speed
920upheap (ANHE *heap, int k)
921{
922 ANHE he = heap [k];
923
924 for (;;)
372 } 925 {
926 int p = HPARENT (k);
373 927
374 timers [k] = w; 928 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
375 timers [k]->active = k + 1; 929 break;
930
931 heap [k] = heap [p];
932 ev_active (ANHE_w (heap [k])) = k;
933 k = p;
934 }
935
936 heap [k] = he;
937 ev_active (ANHE_w (he)) = k;
938}
939
940void inline_size
941adjustheap (ANHE *heap, int N, int k)
942{
943 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
944 upheap (heap, k);
945 else
946 downheap (heap, N, k);
947}
948
949/* rebuild the heap: this function is used only once and executed rarely */
950void inline_size
951reheap (ANHE *heap, int N)
952{
953 int i;
954
955 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
956 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
957 for (i = 0; i < N; ++i)
958 upheap (heap, i + HEAP0);
376} 959}
377 960
378/*****************************************************************************/ 961/*****************************************************************************/
379 962
380typedef struct 963typedef struct
381{ 964{
382 struct ev_signal *head; 965 WL head;
383 sig_atomic_t volatile gotsig; 966 EV_ATOMIC_T gotsig;
384} ANSIG; 967} ANSIG;
385 968
386static ANSIG *signals; 969static ANSIG *signals;
387static int signalmax; 970static int signalmax;
388 971
389static int sigpipe [2]; 972static EV_ATOMIC_T gotsig;
390static sig_atomic_t volatile gotsig;
391static struct ev_io sigev;
392 973
393static void 974void inline_size
394signals_init (ANSIG *base, int count) 975signals_init (ANSIG *base, int count)
395{ 976{
396 while (count--) 977 while (count--)
397 { 978 {
398 base->head = 0; 979 base->head = 0;
… …
400 981
401 ++base; 982 ++base;
402 } 983 }
403} 984}
404 985
986/*****************************************************************************/
987
988void inline_speed
989fd_intern (int fd)
990{
991#ifdef _WIN32
992 unsigned long arg = 1;
993 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
994#else
995 fcntl (fd, F_SETFD, FD_CLOEXEC);
996 fcntl (fd, F_SETFL, O_NONBLOCK);
997#endif
998}
999
1000static void noinline
1001evpipe_init (EV_P)
1002{
1003 if (!ev_is_active (&pipeev))
1004 {
1005#if EV_USE_EVENTFD
1006 if ((evfd = eventfd (0, 0)) >= 0)
1007 {
1008 evpipe [0] = -1;
1009 fd_intern (evfd);
1010 ev_io_set (&pipeev, evfd, EV_READ);
1011 }
1012 else
1013#endif
1014 {
1015 while (pipe (evpipe))
1016 syserr ("(libev) error creating signal/async pipe");
1017
1018 fd_intern (evpipe [0]);
1019 fd_intern (evpipe [1]);
1020 ev_io_set (&pipeev, evpipe [0], EV_READ);
1021 }
1022
1023 ev_io_start (EV_A_ &pipeev);
1024 ev_unref (EV_A); /* watcher should not keep loop alive */
1025 }
1026}
1027
1028void inline_size
1029evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1030{
1031 if (!*flag)
1032 {
1033 int old_errno = errno; /* save errno because write might clobber it */
1034
1035 *flag = 1;
1036
1037#if EV_USE_EVENTFD
1038 if (evfd >= 0)
1039 {
1040 uint64_t counter = 1;
1041 write (evfd, &counter, sizeof (uint64_t));
1042 }
1043 else
1044#endif
1045 write (evpipe [1], &old_errno, 1);
1046
1047 errno = old_errno;
1048 }
1049}
1050
405static void 1051static void
1052pipecb (EV_P_ ev_io *iow, int revents)
1053{
1054#if EV_USE_EVENTFD
1055 if (evfd >= 0)
1056 {
1057 uint64_t counter;
1058 read (evfd, &counter, sizeof (uint64_t));
1059 }
1060 else
1061#endif
1062 {
1063 char dummy;
1064 read (evpipe [0], &dummy, 1);
1065 }
1066
1067 if (gotsig && ev_is_default_loop (EV_A))
1068 {
1069 int signum;
1070 gotsig = 0;
1071
1072 for (signum = signalmax; signum--; )
1073 if (signals [signum].gotsig)
1074 ev_feed_signal_event (EV_A_ signum + 1);
1075 }
1076
1077#if EV_ASYNC_ENABLE
1078 if (gotasync)
1079 {
1080 int i;
1081 gotasync = 0;
1082
1083 for (i = asynccnt; i--; )
1084 if (asyncs [i]->sent)
1085 {
1086 asyncs [i]->sent = 0;
1087 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1088 }
1089 }
1090#endif
1091}
1092
1093/*****************************************************************************/
1094
1095static void
406sighandler (int signum) 1096ev_sighandler (int signum)
407{ 1097{
1098#if EV_MULTIPLICITY
1099 struct ev_loop *loop = &default_loop_struct;
1100#endif
1101
1102#if _WIN32
1103 signal (signum, ev_sighandler);
1104#endif
1105
408 signals [signum - 1].gotsig = 1; 1106 signals [signum - 1].gotsig = 1;
409 1107 evpipe_write (EV_A_ &gotsig);
410 if (!gotsig)
411 {
412 gotsig = 1;
413 write (sigpipe [1], &signum, 1);
414 }
415} 1108}
416 1109
417static void 1110void noinline
418sigcb (struct ev_io *iow, int revents) 1111ev_feed_signal_event (EV_P_ int signum)
419{ 1112{
420 struct ev_signal *w; 1113 WL w;
1114
1115#if EV_MULTIPLICITY
1116 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1117#endif
1118
421 int signum; 1119 --signum;
422 1120
423 read (sigpipe [0], &revents, 1); 1121 if (signum < 0 || signum >= signalmax)
424 gotsig = 0; 1122 return;
425 1123
426 for (signum = signalmax; signum--; )
427 if (signals [signum].gotsig)
428 {
429 signals [signum].gotsig = 0; 1124 signals [signum].gotsig = 0;
430 1125
431 for (w = signals [signum].head; w; w = w->next) 1126 for (w = signals [signum].head; w; w = w->next)
432 event ((W)w, EV_SIGNAL); 1127 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
433 }
434}
435
436static void
437siginit (void)
438{
439 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
440 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
441
442 /* rather than sort out wether we really need nb, set it */
443 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
444 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
445
446 ev_io_set (&sigev, sigpipe [0], EV_READ);
447 ev_io_start (&sigev);
448} 1128}
449 1129
450/*****************************************************************************/ 1130/*****************************************************************************/
451 1131
452static struct ev_idle **idles; 1132static WL childs [EV_PID_HASHSIZE];
453static int idlemax, idlecnt;
454 1133
455static struct ev_prepare **prepares; 1134#ifndef _WIN32
456static int preparemax, preparecnt;
457 1135
458static struct ev_check **checks;
459static int checkmax, checkcnt;
460
461/*****************************************************************************/
462
463static struct ev_child *childs [PID_HASHSIZE];
464static struct ev_signal childev; 1136static ev_signal childev;
1137
1138#ifndef WIFCONTINUED
1139# define WIFCONTINUED(status) 0
1140#endif
1141
1142void inline_speed
1143child_reap (EV_P_ int chain, int pid, int status)
1144{
1145 ev_child *w;
1146 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1147
1148 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1149 {
1150 if ((w->pid == pid || !w->pid)
1151 && (!traced || (w->flags & 1)))
1152 {
1153 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1154 w->rpid = pid;
1155 w->rstatus = status;
1156 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1157 }
1158 }
1159}
465 1160
466#ifndef WCONTINUED 1161#ifndef WCONTINUED
467# define WCONTINUED 0 1162# define WCONTINUED 0
468#endif 1163#endif
469 1164
470static void 1165static void
471childcb (struct ev_signal *sw, int revents) 1166childcb (EV_P_ ev_signal *sw, int revents)
472{ 1167{
473 struct ev_child *w;
474 int pid, status; 1168 int pid, status;
475 1169
1170 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
476 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1171 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
477 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1172 if (!WCONTINUED
478 if (w->pid == pid || !w->pid) 1173 || errno != EINVAL
479 { 1174 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
480 w->status = status; 1175 return;
481 event ((W)w, EV_CHILD); 1176
482 } 1177 /* make sure we are called again until all children have been reaped */
1178 /* we need to do it this way so that the callback gets called before we continue */
1179 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1180
1181 child_reap (EV_A_ pid, pid, status);
1182 if (EV_PID_HASHSIZE > 1)
1183 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
483} 1184}
1185
1186#endif
484 1187
485/*****************************************************************************/ 1188/*****************************************************************************/
486 1189
1190#if EV_USE_PORT
1191# include "ev_port.c"
1192#endif
1193#if EV_USE_KQUEUE
1194# include "ev_kqueue.c"
1195#endif
487#if EV_USE_EPOLL 1196#if EV_USE_EPOLL
488# include "ev_epoll.c" 1197# include "ev_epoll.c"
489#endif 1198#endif
490#if EV_USE_POLL 1199#if EV_USE_POLL
491# include "ev_poll.c" 1200# include "ev_poll.c"
… …
504ev_version_minor (void) 1213ev_version_minor (void)
505{ 1214{
506 return EV_VERSION_MINOR; 1215 return EV_VERSION_MINOR;
507} 1216}
508 1217
509/* return true if we are running with elevated privileges and ignore env variables */ 1218/* return true if we are running with elevated privileges and should ignore env variables */
510static int 1219int inline_size
511enable_secure () 1220enable_secure (void)
512{ 1221{
1222#ifdef _WIN32
1223 return 0;
1224#else
513 return getuid () != geteuid () 1225 return getuid () != geteuid ()
514 || getgid () != getegid (); 1226 || getgid () != getegid ();
1227#endif
515} 1228}
516 1229
517int ev_init (int methods) 1230unsigned int
1231ev_supported_backends (void)
518{ 1232{
519 if (!ev_method) 1233 unsigned int flags = 0;
1234
1235 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1236 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1237 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1238 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1239 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1240
1241 return flags;
1242}
1243
1244unsigned int
1245ev_recommended_backends (void)
1246{
1247 unsigned int flags = ev_supported_backends ();
1248
1249#ifndef __NetBSD__
1250 /* kqueue is borked on everything but netbsd apparently */
1251 /* it usually doesn't work correctly on anything but sockets and pipes */
1252 flags &= ~EVBACKEND_KQUEUE;
1253#endif
1254#ifdef __APPLE__
1255 // flags &= ~EVBACKEND_KQUEUE; for documentation
1256 flags &= ~EVBACKEND_POLL;
1257#endif
1258
1259 return flags;
1260}
1261
1262unsigned int
1263ev_embeddable_backends (void)
1264{
1265 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1266
1267 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1268 /* please fix it and tell me how to detect the fix */
1269 flags &= ~EVBACKEND_EPOLL;
1270
1271 return flags;
1272}
1273
1274unsigned int
1275ev_backend (EV_P)
1276{
1277 return backend;
1278}
1279
1280unsigned int
1281ev_loop_count (EV_P)
1282{
1283 return loop_count;
1284}
1285
1286void
1287ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1288{
1289 io_blocktime = interval;
1290}
1291
1292void
1293ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1294{
1295 timeout_blocktime = interval;
1296}
1297
1298static void noinline
1299loop_init (EV_P_ unsigned int flags)
1300{
1301 if (!backend)
520 { 1302 {
521#if EV_USE_MONOTONIC 1303#if EV_USE_MONOTONIC
522 { 1304 {
523 struct timespec ts; 1305 struct timespec ts;
524 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1306 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
525 have_monotonic = 1; 1307 have_monotonic = 1;
526 } 1308 }
527#endif 1309#endif
528 1310
529 ev_now = ev_time (); 1311 ev_rt_now = ev_time ();
530 now = get_clock (); 1312 mn_now = get_clock ();
531 now_floor = now; 1313 now_floor = mn_now;
532 diff = ev_now - now; 1314 rtmn_diff = ev_rt_now - mn_now;
533 1315
534 if (pipe (sigpipe)) 1316 io_blocktime = 0.;
535 return 0; 1317 timeout_blocktime = 0.;
1318 backend = 0;
1319 backend_fd = -1;
1320 gotasync = 0;
1321#if EV_USE_INOTIFY
1322 fs_fd = -2;
1323#endif
536 1324
537 if (methods == EVMETHOD_AUTO) 1325 /* pid check not overridable via env */
538 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1326#ifndef _WIN32
1327 if (flags & EVFLAG_FORKCHECK)
1328 curpid = getpid ();
1329#endif
1330
1331 if (!(flags & EVFLAG_NOENV)
1332 && !enable_secure ()
1333 && getenv ("LIBEV_FLAGS"))
539 methods = atoi (getenv ("LIBEV_METHODS")); 1334 flags = atoi (getenv ("LIBEV_FLAGS"));
540 else
541 methods = EVMETHOD_ANY;
542 1335
543 ev_method = 0; 1336 if (!(flags & 0x0000ffffU))
1337 flags |= ev_recommended_backends ();
1338
1339#if EV_USE_PORT
1340 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1341#endif
1342#if EV_USE_KQUEUE
1343 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1344#endif
544#if EV_USE_EPOLL 1345#if EV_USE_EPOLL
545 if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods); 1346 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
546#endif 1347#endif
547#if EV_USE_POLL 1348#if EV_USE_POLL
548 if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods); 1349 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
549#endif 1350#endif
550#if EV_USE_SELECT 1351#if EV_USE_SELECT
551 if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods); 1352 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
552#endif 1353#endif
553 1354
554 if (ev_method) 1355 ev_init (&pipeev, pipecb);
1356 ev_set_priority (&pipeev, EV_MAXPRI);
1357 }
1358}
1359
1360static void noinline
1361loop_destroy (EV_P)
1362{
1363 int i;
1364
1365 if (ev_is_active (&pipeev))
1366 {
1367 ev_ref (EV_A); /* signal watcher */
1368 ev_io_stop (EV_A_ &pipeev);
1369
1370#if EV_USE_EVENTFD
1371 if (evfd >= 0)
1372 close (evfd);
1373#endif
1374
1375 if (evpipe [0] >= 0)
555 { 1376 {
556 ev_watcher_init (&sigev, sigcb); 1377 close (evpipe [0]);
557 siginit (); 1378 close (evpipe [1]);
1379 }
1380 }
558 1381
1382#if EV_USE_INOTIFY
1383 if (fs_fd >= 0)
1384 close (fs_fd);
1385#endif
1386
1387 if (backend_fd >= 0)
1388 close (backend_fd);
1389
1390#if EV_USE_PORT
1391 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1392#endif
1393#if EV_USE_KQUEUE
1394 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1395#endif
1396#if EV_USE_EPOLL
1397 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1398#endif
1399#if EV_USE_POLL
1400 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1401#endif
1402#if EV_USE_SELECT
1403 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1404#endif
1405
1406 for (i = NUMPRI; i--; )
1407 {
1408 array_free (pending, [i]);
1409#if EV_IDLE_ENABLE
1410 array_free (idle, [i]);
1411#endif
1412 }
1413
1414 ev_free (anfds); anfdmax = 0;
1415
1416 /* have to use the microsoft-never-gets-it-right macro */
1417 array_free (fdchange, EMPTY);
1418 array_free (timer, EMPTY);
1419#if EV_PERIODIC_ENABLE
1420 array_free (periodic, EMPTY);
1421#endif
1422#if EV_FORK_ENABLE
1423 array_free (fork, EMPTY);
1424#endif
1425 array_free (prepare, EMPTY);
1426 array_free (check, EMPTY);
1427#if EV_ASYNC_ENABLE
1428 array_free (async, EMPTY);
1429#endif
1430
1431 backend = 0;
1432}
1433
1434#if EV_USE_INOTIFY
1435void inline_size infy_fork (EV_P);
1436#endif
1437
1438void inline_size
1439loop_fork (EV_P)
1440{
1441#if EV_USE_PORT
1442 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1443#endif
1444#if EV_USE_KQUEUE
1445 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1446#endif
1447#if EV_USE_EPOLL
1448 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1449#endif
1450#if EV_USE_INOTIFY
1451 infy_fork (EV_A);
1452#endif
1453
1454 if (ev_is_active (&pipeev))
1455 {
1456 /* this "locks" the handlers against writing to the pipe */
1457 /* while we modify the fd vars */
1458 gotsig = 1;
1459#if EV_ASYNC_ENABLE
1460 gotasync = 1;
1461#endif
1462
1463 ev_ref (EV_A);
1464 ev_io_stop (EV_A_ &pipeev);
1465
1466#if EV_USE_EVENTFD
1467 if (evfd >= 0)
1468 close (evfd);
1469#endif
1470
1471 if (evpipe [0] >= 0)
1472 {
1473 close (evpipe [0]);
1474 close (evpipe [1]);
1475 }
1476
1477 evpipe_init (EV_A);
1478 /* now iterate over everything, in case we missed something */
1479 pipecb (EV_A_ &pipeev, EV_READ);
1480 }
1481
1482 postfork = 0;
1483}
1484
1485#if EV_MULTIPLICITY
1486
1487struct ev_loop *
1488ev_loop_new (unsigned int flags)
1489{
1490 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1491
1492 memset (loop, 0, sizeof (struct ev_loop));
1493
1494 loop_init (EV_A_ flags);
1495
1496 if (ev_backend (EV_A))
1497 return loop;
1498
1499 return 0;
1500}
1501
1502void
1503ev_loop_destroy (EV_P)
1504{
1505 loop_destroy (EV_A);
1506 ev_free (loop);
1507}
1508
1509void
1510ev_loop_fork (EV_P)
1511{
1512 postfork = 1; /* must be in line with ev_default_fork */
1513}
1514
1515#if EV_VERIFY
1516static void noinline
1517verify_watcher (EV_P_ W w)
1518{
1519 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1520
1521 if (w->pending)
1522 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1523}
1524
1525static void noinline
1526verify_heap (EV_P_ ANHE *heap, int N)
1527{
1528 int i;
1529
1530 for (i = HEAP0; i < N + HEAP0; ++i)
1531 {
1532 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1533 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1534 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1535
1536 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1537 }
1538}
1539
1540static void noinline
1541array_verify (EV_P_ W *ws, int cnt)
1542{
1543 while (cnt--)
1544 {
1545 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1546 verify_watcher (EV_A_ ws [cnt]);
1547 }
1548}
1549#endif
1550
1551void
1552ev_loop_verify (EV_P)
1553{
1554#if EV_VERIFY
1555 int i;
1556 WL w;
1557
1558 assert (activecnt >= -1);
1559
1560 assert (fdchangemax >= fdchangecnt);
1561 for (i = 0; i < fdchangecnt; ++i)
1562 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1563
1564 assert (anfdmax >= 0);
1565 for (i = 0; i < anfdmax; ++i)
1566 for (w = anfds [i].head; w; w = w->next)
1567 {
1568 verify_watcher (EV_A_ (W)w);
1569 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
1570 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1571 }
1572
1573 assert (timermax >= timercnt);
1574 verify_heap (EV_A_ timers, timercnt);
1575
1576#if EV_PERIODIC_ENABLE
1577 assert (periodicmax >= periodiccnt);
1578 verify_heap (EV_A_ periodics, periodiccnt);
1579#endif
1580
1581 for (i = NUMPRI; i--; )
1582 {
1583 assert (pendingmax [i] >= pendingcnt [i]);
1584#if EV_IDLE_ENABLE
1585 assert (idleall >= 0);
1586 assert (idlemax [i] >= idlecnt [i]);
1587 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1588#endif
1589 }
1590
1591#if EV_FORK_ENABLE
1592 assert (forkmax >= forkcnt);
1593 array_verify (EV_A_ (W *)forks, forkcnt);
1594#endif
1595
1596#if EV_ASYNC_ENABLE
1597 assert (asyncmax >= asynccnt);
1598 array_verify (EV_A_ (W *)asyncs, asynccnt);
1599#endif
1600
1601 assert (preparemax >= preparecnt);
1602 array_verify (EV_A_ (W *)prepares, preparecnt);
1603
1604 assert (checkmax >= checkcnt);
1605 array_verify (EV_A_ (W *)checks, checkcnt);
1606
1607# if 0
1608 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1609 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1610# endif
1611#endif
1612}
1613
1614#endif /* multiplicity */
1615
1616#if EV_MULTIPLICITY
1617struct ev_loop *
1618ev_default_loop_init (unsigned int flags)
1619#else
1620int
1621ev_default_loop (unsigned int flags)
1622#endif
1623{
1624 if (!ev_default_loop_ptr)
1625 {
1626#if EV_MULTIPLICITY
1627 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1628#else
1629 ev_default_loop_ptr = 1;
1630#endif
1631
1632 loop_init (EV_A_ flags);
1633
1634 if (ev_backend (EV_A))
1635 {
1636#ifndef _WIN32
559 ev_signal_init (&childev, childcb, SIGCHLD); 1637 ev_signal_init (&childev, childcb, SIGCHLD);
1638 ev_set_priority (&childev, EV_MAXPRI);
560 ev_signal_start (&childev); 1639 ev_signal_start (EV_A_ &childev);
1640 ev_unref (EV_A); /* child watcher should not keep loop alive */
1641#endif
561 } 1642 }
1643 else
1644 ev_default_loop_ptr = 0;
562 } 1645 }
563 1646
564 return ev_method; 1647 return ev_default_loop_ptr;
1648}
1649
1650void
1651ev_default_destroy (void)
1652{
1653#if EV_MULTIPLICITY
1654 struct ev_loop *loop = ev_default_loop_ptr;
1655#endif
1656
1657#ifndef _WIN32
1658 ev_ref (EV_A); /* child watcher */
1659 ev_signal_stop (EV_A_ &childev);
1660#endif
1661
1662 loop_destroy (EV_A);
1663}
1664
1665void
1666ev_default_fork (void)
1667{
1668#if EV_MULTIPLICITY
1669 struct ev_loop *loop = ev_default_loop_ptr;
1670#endif
1671
1672 if (backend)
1673 postfork = 1; /* must be in line with ev_loop_fork */
565} 1674}
566 1675
567/*****************************************************************************/ 1676/*****************************************************************************/
568 1677
569void 1678void
570ev_fork_prepare (void) 1679ev_invoke (EV_P_ void *w, int revents)
571{ 1680{
572 /* nop */ 1681 EV_CB_INVOKE ((W)w, revents);
573} 1682}
574 1683
575void 1684void inline_speed
576ev_fork_parent (void)
577{
578 /* nop */
579}
580
581void
582ev_fork_child (void)
583{
584#if EV_USE_EPOLL
585 if (ev_method == EVMETHOD_EPOLL)
586 epoll_postfork_child ();
587#endif
588
589 ev_io_stop (&sigev);
590 close (sigpipe [0]);
591 close (sigpipe [1]);
592 pipe (sigpipe);
593 siginit ();
594}
595
596/*****************************************************************************/
597
598static void
599call_pending (void) 1685call_pending (EV_P)
600{ 1686{
601 int pri; 1687 int pri;
602 1688
603 for (pri = NUMPRI; pri--; ) 1689 for (pri = NUMPRI; pri--; )
604 while (pendingcnt [pri]) 1690 while (pendingcnt [pri])
605 { 1691 {
606 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1692 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
607 1693
608 if (p->w) 1694 if (expect_true (p->w))
609 { 1695 {
1696 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1697
610 p->w->pending = 0; 1698 p->w->pending = 0;
611 p->w->cb (p->w, p->events); 1699 EV_CB_INVOKE (p->w, p->events);
1700 EV_FREQUENT_CHECK;
612 } 1701 }
613 } 1702 }
614} 1703}
615 1704
616static void 1705#if EV_IDLE_ENABLE
617timers_reify (void) 1706void inline_size
1707idle_reify (EV_P)
618{ 1708{
619 while (timercnt && timers [0]->at <= now) 1709 if (expect_false (idleall))
1710 {
1711 int pri;
1712
1713 for (pri = NUMPRI; pri--; )
1714 {
1715 if (pendingcnt [pri])
1716 break;
1717
1718 if (idlecnt [pri])
1719 {
1720 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1721 break;
1722 }
1723 }
620 { 1724 }
621 struct ev_timer *w = timers [0]; 1725}
1726#endif
1727
1728void inline_size
1729timers_reify (EV_P)
1730{
1731 EV_FREQUENT_CHECK;
1732
1733 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1734 {
1735 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1736
1737 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
622 1738
623 /* first reschedule or stop timer */ 1739 /* first reschedule or stop timer */
624 if (w->repeat) 1740 if (w->repeat)
625 { 1741 {
1742 ev_at (w) += w->repeat;
1743 if (ev_at (w) < mn_now)
1744 ev_at (w) = mn_now;
1745
626 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1746 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
627 w->at = now + w->repeat; 1747
1748 ANHE_at_cache (timers [HEAP0]);
628 downheap ((WT *)timers, timercnt, 0); 1749 downheap (timers, timercnt, HEAP0);
629 } 1750 }
630 else 1751 else
631 ev_timer_stop (w); /* nonrepeating: stop timer */ 1752 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
632 1753
1754 EV_FREQUENT_CHECK;
633 event ((W)w, EV_TIMEOUT); 1755 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
634 } 1756 }
635} 1757}
636 1758
637static void 1759#if EV_PERIODIC_ENABLE
1760void inline_size
638periodics_reify (void) 1761periodics_reify (EV_P)
639{ 1762{
1763 EV_FREQUENT_CHECK;
1764
640 while (periodiccnt && periodics [0]->at <= ev_now) 1765 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
641 { 1766 {
642 struct ev_periodic *w = periodics [0]; 1767 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1768
1769 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
643 1770
644 /* first reschedule or stop timer */ 1771 /* first reschedule or stop timer */
645 if (w->interval) 1772 if (w->reschedule_cb)
646 { 1773 {
647 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1774 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
648 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); 1775
1776 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1777
1778 ANHE_at_cache (periodics [HEAP0]);
649 downheap ((WT *)periodics, periodiccnt, 0); 1779 downheap (periodics, periodiccnt, HEAP0);
1780 }
1781 else if (w->interval)
1782 {
1783 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1784 /* if next trigger time is not sufficiently in the future, put it there */
1785 /* this might happen because of floating point inexactness */
1786 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1787 {
1788 ev_at (w) += w->interval;
1789
1790 /* if interval is unreasonably low we might still have a time in the past */
1791 /* so correct this. this will make the periodic very inexact, but the user */
1792 /* has effectively asked to get triggered more often than possible */
1793 if (ev_at (w) < ev_rt_now)
1794 ev_at (w) = ev_rt_now;
1795 }
1796
1797 ANHE_at_cache (periodics [HEAP0]);
1798 downheap (periodics, periodiccnt, HEAP0);
650 } 1799 }
651 else 1800 else
652 ev_periodic_stop (w); /* nonrepeating: stop timer */ 1801 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
653 1802
1803 EV_FREQUENT_CHECK;
654 event ((W)w, EV_PERIODIC); 1804 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
655 } 1805 }
656} 1806}
657 1807
658static void 1808static void noinline
659periodics_reschedule (ev_tstamp diff) 1809periodics_reschedule (EV_P)
660{ 1810{
661 int i; 1811 int i;
662 1812
663 /* adjust periodics after time jump */ 1813 /* adjust periodics after time jump */
664 for (i = 0; i < periodiccnt; ++i) 1814 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
665 { 1815 {
666 struct ev_periodic *w = periodics [i]; 1816 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
667 1817
1818 if (w->reschedule_cb)
1819 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
668 if (w->interval) 1820 else if (w->interval)
1821 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1822
1823 ANHE_at_cache (periodics [i]);
1824 }
1825
1826 reheap (periodics, periodiccnt);
1827}
1828#endif
1829
1830void inline_speed
1831time_update (EV_P_ ev_tstamp max_block)
1832{
1833 int i;
1834
1835#if EV_USE_MONOTONIC
1836 if (expect_true (have_monotonic))
1837 {
1838 ev_tstamp odiff = rtmn_diff;
1839
1840 mn_now = get_clock ();
1841
1842 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1843 /* interpolate in the meantime */
1844 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
669 { 1845 {
670 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1846 ev_rt_now = rtmn_diff + mn_now;
1847 return;
1848 }
671 1849
672 if (fabs (diff) >= 1e-4) 1850 now_floor = mn_now;
1851 ev_rt_now = ev_time ();
1852
1853 /* loop a few times, before making important decisions.
1854 * on the choice of "4": one iteration isn't enough,
1855 * in case we get preempted during the calls to
1856 * ev_time and get_clock. a second call is almost guaranteed
1857 * to succeed in that case, though. and looping a few more times
1858 * doesn't hurt either as we only do this on time-jumps or
1859 * in the unlikely event of having been preempted here.
1860 */
1861 for (i = 4; --i; )
1862 {
1863 rtmn_diff = ev_rt_now - mn_now;
1864
1865 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1866 return; /* all is well */
1867
1868 ev_rt_now = ev_time ();
1869 mn_now = get_clock ();
1870 now_floor = mn_now;
1871 }
1872
1873# if EV_PERIODIC_ENABLE
1874 periodics_reschedule (EV_A);
1875# endif
1876 /* no timer adjustment, as the monotonic clock doesn't jump */
1877 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1878 }
1879 else
1880#endif
1881 {
1882 ev_rt_now = ev_time ();
1883
1884 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1885 {
1886#if EV_PERIODIC_ENABLE
1887 periodics_reschedule (EV_A);
1888#endif
1889 /* adjust timers. this is easy, as the offset is the same for all of them */
1890 for (i = 0; i < timercnt; ++i)
673 { 1891 {
674 ev_periodic_stop (w); 1892 ANHE *he = timers + i + HEAP0;
675 ev_periodic_start (w); 1893 ANHE_w (*he)->at += ev_rt_now - mn_now;
676 1894 ANHE_at_cache (*he);
677 i = 0; /* restart loop, inefficient, but time jumps should be rare */
678 } 1895 }
679 } 1896 }
680 }
681}
682 1897
683static int
684time_update_monotonic (void)
685{
686 now = get_clock ();
687
688 if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))
689 {
690 ev_now = now + diff;
691 return 0;
692 }
693 else
694 {
695 now_floor = now;
696 ev_now = ev_time ();
697 return 1;
698 }
699}
700
701static void
702time_update (void)
703{
704 int i;
705
706#if EV_USE_MONOTONIC
707 if (expect_true (have_monotonic))
708 {
709 if (time_update_monotonic ())
710 {
711 ev_tstamp odiff = diff;
712
713 for (i = 4; --i; ) /* loop a few times, before making important decisions */
714 {
715 diff = ev_now - now;
716
717 if (fabs (odiff - diff) < MIN_TIMEJUMP)
718 return; /* all is well */
719
720 ev_now = ev_time ();
721 now = get_clock ();
722 now_floor = now;
723 }
724
725 periodics_reschedule (diff - odiff);
726 /* no timer adjustment, as the monotonic clock doesn't jump */
727 }
728 }
729 else
730#endif
731 {
732 ev_now = ev_time ();
733
734 if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
735 {
736 periodics_reschedule (ev_now - now);
737
738 /* adjust timers. this is easy, as the offset is the same for all */
739 for (i = 0; i < timercnt; ++i)
740 timers [i]->at += diff;
741 }
742
743 now = ev_now; 1898 mn_now = ev_rt_now;
744 } 1899 }
745} 1900}
746 1901
747int ev_loop_done; 1902void
1903ev_ref (EV_P)
1904{
1905 ++activecnt;
1906}
748 1907
1908void
1909ev_unref (EV_P)
1910{
1911 --activecnt;
1912}
1913
1914void
1915ev_now_update (EV_P)
1916{
1917 time_update (EV_A_ 1e100);
1918}
1919
1920static int loop_done;
1921
1922void
749void ev_loop (int flags) 1923ev_loop (EV_P_ int flags)
750{ 1924{
751 double block; 1925 loop_done = EVUNLOOP_CANCEL;
752 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1926
1927 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
753 1928
754 do 1929 do
755 { 1930 {
1931#if EV_VERIFY >= 2
1932 ev_loop_verify (EV_A);
1933#endif
1934
1935#ifndef _WIN32
1936 if (expect_false (curpid)) /* penalise the forking check even more */
1937 if (expect_false (getpid () != curpid))
1938 {
1939 curpid = getpid ();
1940 postfork = 1;
1941 }
1942#endif
1943
1944#if EV_FORK_ENABLE
1945 /* we might have forked, so queue fork handlers */
1946 if (expect_false (postfork))
1947 if (forkcnt)
1948 {
1949 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1950 call_pending (EV_A);
1951 }
1952#endif
1953
756 /* queue check watchers (and execute them) */ 1954 /* queue prepare watchers (and execute them) */
757 if (expect_false (preparecnt)) 1955 if (expect_false (preparecnt))
758 { 1956 {
759 queue_events ((W *)prepares, preparecnt, EV_PREPARE); 1957 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
760 call_pending (); 1958 call_pending (EV_A);
761 } 1959 }
762 1960
1961 if (expect_false (!activecnt))
1962 break;
1963
1964 /* we might have forked, so reify kernel state if necessary */
1965 if (expect_false (postfork))
1966 loop_fork (EV_A);
1967
763 /* update fd-related kernel structures */ 1968 /* update fd-related kernel structures */
764 fd_reify (); 1969 fd_reify (EV_A);
765 1970
766 /* calculate blocking time */ 1971 /* calculate blocking time */
1972 {
1973 ev_tstamp waittime = 0.;
1974 ev_tstamp sleeptime = 0.;
767 1975
768 /* we only need this for !monotonic clockor timers, but as we basically 1976 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
769 always have timers, we just calculate it always */
770#if EV_USE_MONOTONIC
771 if (expect_true (have_monotonic))
772 time_update_monotonic ();
773 else
774#endif
775 { 1977 {
776 ev_now = ev_time (); 1978 /* update time to cancel out callback processing overhead */
777 now = ev_now; 1979 time_update (EV_A_ 1e100);
778 }
779 1980
780 if (flags & EVLOOP_NONBLOCK || idlecnt)
781 block = 0.;
782 else
783 {
784 block = MAX_BLOCKTIME; 1981 waittime = MAX_BLOCKTIME;
785 1982
786 if (timercnt) 1983 if (timercnt)
787 { 1984 {
788 ev_tstamp to = timers [0]->at - now + method_fudge; 1985 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
789 if (block > to) block = to; 1986 if (waittime > to) waittime = to;
790 } 1987 }
791 1988
1989#if EV_PERIODIC_ENABLE
792 if (periodiccnt) 1990 if (periodiccnt)
793 { 1991 {
794 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1992 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
795 if (block > to) block = to; 1993 if (waittime > to) waittime = to;
796 } 1994 }
1995#endif
797 1996
798 if (block < 0.) block = 0.; 1997 if (expect_false (waittime < timeout_blocktime))
1998 waittime = timeout_blocktime;
1999
2000 sleeptime = waittime - backend_fudge;
2001
2002 if (expect_true (sleeptime > io_blocktime))
2003 sleeptime = io_blocktime;
2004
2005 if (sleeptime)
2006 {
2007 ev_sleep (sleeptime);
2008 waittime -= sleeptime;
2009 }
799 } 2010 }
800 2011
801 method_poll (block); 2012 ++loop_count;
2013 backend_poll (EV_A_ waittime);
802 2014
803 /* update ev_now, do magic */ 2015 /* update ev_rt_now, do magic */
804 time_update (); 2016 time_update (EV_A_ waittime + sleeptime);
2017 }
805 2018
806 /* queue pending timers and reschedule them */ 2019 /* queue pending timers and reschedule them */
807 timers_reify (); /* relative timers called last */ 2020 timers_reify (EV_A); /* relative timers called last */
2021#if EV_PERIODIC_ENABLE
808 periodics_reify (); /* absolute timers called first */ 2022 periodics_reify (EV_A); /* absolute timers called first */
2023#endif
809 2024
2025#if EV_IDLE_ENABLE
810 /* queue idle watchers unless io or timers are pending */ 2026 /* queue idle watchers unless other events are pending */
811 if (!pendingcnt) 2027 idle_reify (EV_A);
812 queue_events ((W *)idles, idlecnt, EV_IDLE); 2028#endif
813 2029
814 /* queue check watchers, to be executed first */ 2030 /* queue check watchers, to be executed first */
815 if (checkcnt) 2031 if (expect_false (checkcnt))
816 queue_events ((W *)checks, checkcnt, EV_CHECK); 2032 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
817 2033
818 call_pending (); 2034 call_pending (EV_A);
819 } 2035 }
820 while (!ev_loop_done); 2036 while (expect_true (
2037 activecnt
2038 && !loop_done
2039 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2040 ));
821 2041
822 if (ev_loop_done != 2) 2042 if (loop_done == EVUNLOOP_ONE)
2043 loop_done = EVUNLOOP_CANCEL;
2044}
2045
2046void
2047ev_unloop (EV_P_ int how)
2048{
823 ev_loop_done = 0; 2049 loop_done = how;
824} 2050}
825 2051
826/*****************************************************************************/ 2052/*****************************************************************************/
827 2053
828static void 2054void inline_size
829wlist_add (WL *head, WL elem) 2055wlist_add (WL *head, WL elem)
830{ 2056{
831 elem->next = *head; 2057 elem->next = *head;
832 *head = elem; 2058 *head = elem;
833} 2059}
834 2060
835static void 2061void inline_size
836wlist_del (WL *head, WL elem) 2062wlist_del (WL *head, WL elem)
837{ 2063{
838 while (*head) 2064 while (*head)
839 { 2065 {
840 if (*head == elem) 2066 if (*head == elem)
… …
845 2071
846 head = &(*head)->next; 2072 head = &(*head)->next;
847 } 2073 }
848} 2074}
849 2075
850static void 2076void inline_speed
851ev_clear_pending (W w) 2077clear_pending (EV_P_ W w)
852{ 2078{
853 if (w->pending) 2079 if (w->pending)
854 { 2080 {
855 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2081 pendings [ABSPRI (w)][w->pending - 1].w = 0;
856 w->pending = 0; 2082 w->pending = 0;
857 } 2083 }
858} 2084}
859 2085
860static void 2086int
2087ev_clear_pending (EV_P_ void *w)
2088{
2089 W w_ = (W)w;
2090 int pending = w_->pending;
2091
2092 if (expect_true (pending))
2093 {
2094 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2095 w_->pending = 0;
2096 p->w = 0;
2097 return p->events;
2098 }
2099 else
2100 return 0;
2101}
2102
2103void inline_size
2104pri_adjust (EV_P_ W w)
2105{
2106 int pri = w->priority;
2107 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2108 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2109 w->priority = pri;
2110}
2111
2112void inline_speed
861ev_start (W w, int active) 2113ev_start (EV_P_ W w, int active)
862{ 2114{
2115 pri_adjust (EV_A_ w);
863 w->active = active; 2116 w->active = active;
2117 ev_ref (EV_A);
864} 2118}
865 2119
866static void 2120void inline_size
867ev_stop (W w) 2121ev_stop (EV_P_ W w)
868{ 2122{
2123 ev_unref (EV_A);
869 w->active = 0; 2124 w->active = 0;
870} 2125}
871 2126
872/*****************************************************************************/ 2127/*****************************************************************************/
873 2128
874void 2129void noinline
875ev_io_start (struct ev_io *w) 2130ev_io_start (EV_P_ ev_io *w)
876{ 2131{
877 int fd = w->fd; 2132 int fd = w->fd;
878 2133
879 if (ev_is_active (w)) 2134 if (expect_false (ev_is_active (w)))
880 return; 2135 return;
881 2136
882 assert (("ev_io_start called with negative fd", fd >= 0)); 2137 assert (("ev_io_start called with negative fd", fd >= 0));
883 2138
2139 EV_FREQUENT_CHECK;
2140
884 ev_start ((W)w, 1); 2141 ev_start (EV_A_ (W)w, 1);
885 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2142 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
886 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2143 wlist_add (&anfds[fd].head, (WL)w);
887 2144
888 fd_change (fd); 2145 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
889} 2146 w->events &= ~EV_IOFDSET;
890 2147
891void 2148 EV_FREQUENT_CHECK;
2149}
2150
2151void noinline
892ev_io_stop (struct ev_io *w) 2152ev_io_stop (EV_P_ ev_io *w)
893{ 2153{
894 ev_clear_pending ((W)w); 2154 clear_pending (EV_A_ (W)w);
895 if (!ev_is_active (w)) 2155 if (expect_false (!ev_is_active (w)))
896 return; 2156 return;
897 2157
2158 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2159
2160 EV_FREQUENT_CHECK;
2161
898 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2162 wlist_del (&anfds[w->fd].head, (WL)w);
899 ev_stop ((W)w); 2163 ev_stop (EV_A_ (W)w);
900 2164
901 fd_change (w->fd); 2165 fd_change (EV_A_ w->fd, 1);
902}
903 2166
904void 2167 EV_FREQUENT_CHECK;
2168}
2169
2170void noinline
905ev_timer_start (struct ev_timer *w) 2171ev_timer_start (EV_P_ ev_timer *w)
906{ 2172{
907 if (ev_is_active (w)) 2173 if (expect_false (ev_is_active (w)))
908 return; 2174 return;
909 2175
910 w->at += now; 2176 ev_at (w) += mn_now;
911 2177
912 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2178 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
913 2179
914 ev_start ((W)w, ++timercnt); 2180 EV_FREQUENT_CHECK;
915 array_needsize (timers, timermax, timercnt, );
916 timers [timercnt - 1] = w;
917 upheap ((WT *)timers, timercnt - 1);
918}
919 2181
920void 2182 ++timercnt;
2183 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2184 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2185 ANHE_w (timers [ev_active (w)]) = (WT)w;
2186 ANHE_at_cache (timers [ev_active (w)]);
2187 upheap (timers, ev_active (w));
2188
2189 EV_FREQUENT_CHECK;
2190
2191 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2192}
2193
2194void noinline
921ev_timer_stop (struct ev_timer *w) 2195ev_timer_stop (EV_P_ ev_timer *w)
922{ 2196{
923 ev_clear_pending ((W)w); 2197 clear_pending (EV_A_ (W)w);
924 if (!ev_is_active (w)) 2198 if (expect_false (!ev_is_active (w)))
925 return; 2199 return;
926 2200
927 if (w->active < timercnt--) 2201 EV_FREQUENT_CHECK;
2202
2203 {
2204 int active = ev_active (w);
2205
2206 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2207
2208 --timercnt;
2209
2210 if (expect_true (active < timercnt + HEAP0))
928 { 2211 {
929 timers [w->active - 1] = timers [timercnt]; 2212 timers [active] = timers [timercnt + HEAP0];
930 downheap ((WT *)timers, timercnt, w->active - 1); 2213 adjustheap (timers, timercnt, active);
931 } 2214 }
2215 }
932 2216
933 w->at = w->repeat; 2217 EV_FREQUENT_CHECK;
934 2218
2219 ev_at (w) -= mn_now;
2220
935 ev_stop ((W)w); 2221 ev_stop (EV_A_ (W)w);
936} 2222}
937 2223
938void 2224void noinline
939ev_timer_again (struct ev_timer *w) 2225ev_timer_again (EV_P_ ev_timer *w)
940{ 2226{
2227 EV_FREQUENT_CHECK;
2228
941 if (ev_is_active (w)) 2229 if (ev_is_active (w))
942 { 2230 {
943 if (w->repeat) 2231 if (w->repeat)
944 { 2232 {
945 w->at = now + w->repeat; 2233 ev_at (w) = mn_now + w->repeat;
2234 ANHE_at_cache (timers [ev_active (w)]);
946 downheap ((WT *)timers, timercnt, w->active - 1); 2235 adjustheap (timers, timercnt, ev_active (w));
947 } 2236 }
948 else 2237 else
949 ev_timer_stop (w); 2238 ev_timer_stop (EV_A_ w);
950 } 2239 }
951 else if (w->repeat) 2240 else if (w->repeat)
2241 {
2242 ev_at (w) = w->repeat;
952 ev_timer_start (w); 2243 ev_timer_start (EV_A_ w);
953} 2244 }
954 2245
955void 2246 EV_FREQUENT_CHECK;
2247}
2248
2249#if EV_PERIODIC_ENABLE
2250void noinline
956ev_periodic_start (struct ev_periodic *w) 2251ev_periodic_start (EV_P_ ev_periodic *w)
957{ 2252{
958 if (ev_is_active (w)) 2253 if (expect_false (ev_is_active (w)))
959 return; 2254 return;
960 2255
2256 if (w->reschedule_cb)
2257 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2258 else if (w->interval)
2259 {
961 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2260 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
962
963 /* this formula differs from the one in periodic_reify because we do not always round up */ 2261 /* this formula differs from the one in periodic_reify because we do not always round up */
964 if (w->interval)
965 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 2262 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2263 }
2264 else
2265 ev_at (w) = w->offset;
966 2266
2267 EV_FREQUENT_CHECK;
2268
2269 ++periodiccnt;
967 ev_start ((W)w, ++periodiccnt); 2270 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
968 array_needsize (periodics, periodicmax, periodiccnt, ); 2271 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
969 periodics [periodiccnt - 1] = w; 2272 ANHE_w (periodics [ev_active (w)]) = (WT)w;
970 upheap ((WT *)periodics, periodiccnt - 1); 2273 ANHE_at_cache (periodics [ev_active (w)]);
971} 2274 upheap (periodics, ev_active (w));
972 2275
973void 2276 EV_FREQUENT_CHECK;
2277
2278 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2279}
2280
2281void noinline
974ev_periodic_stop (struct ev_periodic *w) 2282ev_periodic_stop (EV_P_ ev_periodic *w)
975{ 2283{
976 ev_clear_pending ((W)w); 2284 clear_pending (EV_A_ (W)w);
977 if (!ev_is_active (w)) 2285 if (expect_false (!ev_is_active (w)))
978 return; 2286 return;
979 2287
980 if (w->active < periodiccnt--) 2288 EV_FREQUENT_CHECK;
2289
2290 {
2291 int active = ev_active (w);
2292
2293 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2294
2295 --periodiccnt;
2296
2297 if (expect_true (active < periodiccnt + HEAP0))
981 { 2298 {
982 periodics [w->active - 1] = periodics [periodiccnt]; 2299 periodics [active] = periodics [periodiccnt + HEAP0];
983 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2300 adjustheap (periodics, periodiccnt, active);
984 } 2301 }
2302 }
985 2303
2304 EV_FREQUENT_CHECK;
2305
986 ev_stop ((W)w); 2306 ev_stop (EV_A_ (W)w);
987} 2307}
988 2308
989void 2309void noinline
2310ev_periodic_again (EV_P_ ev_periodic *w)
2311{
2312 /* TODO: use adjustheap and recalculation */
2313 ev_periodic_stop (EV_A_ w);
2314 ev_periodic_start (EV_A_ w);
2315}
2316#endif
2317
2318#ifndef SA_RESTART
2319# define SA_RESTART 0
2320#endif
2321
2322void noinline
990ev_signal_start (struct ev_signal *w) 2323ev_signal_start (EV_P_ ev_signal *w)
991{ 2324{
2325#if EV_MULTIPLICITY
2326 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2327#endif
992 if (ev_is_active (w)) 2328 if (expect_false (ev_is_active (w)))
993 return; 2329 return;
994 2330
995 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2331 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
996 2332
997 ev_start ((W)w, 1); 2333 evpipe_init (EV_A);
2334
2335 EV_FREQUENT_CHECK;
2336
2337 {
2338#ifndef _WIN32
2339 sigset_t full, prev;
2340 sigfillset (&full);
2341 sigprocmask (SIG_SETMASK, &full, &prev);
2342#endif
2343
998 array_needsize (signals, signalmax, w->signum, signals_init); 2344 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2345
2346#ifndef _WIN32
2347 sigprocmask (SIG_SETMASK, &prev, 0);
2348#endif
2349 }
2350
2351 ev_start (EV_A_ (W)w, 1);
999 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2352 wlist_add (&signals [w->signum - 1].head, (WL)w);
1000 2353
1001 if (!w->next) 2354 if (!((WL)w)->next)
1002 { 2355 {
2356#if _WIN32
2357 signal (w->signum, ev_sighandler);
2358#else
1003 struct sigaction sa; 2359 struct sigaction sa;
1004 sa.sa_handler = sighandler; 2360 sa.sa_handler = ev_sighandler;
1005 sigfillset (&sa.sa_mask); 2361 sigfillset (&sa.sa_mask);
1006 sa.sa_flags = 0; 2362 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1007 sigaction (w->signum, &sa, 0); 2363 sigaction (w->signum, &sa, 0);
2364#endif
1008 } 2365 }
1009}
1010 2366
1011void 2367 EV_FREQUENT_CHECK;
2368}
2369
2370void noinline
1012ev_signal_stop (struct ev_signal *w) 2371ev_signal_stop (EV_P_ ev_signal *w)
1013{ 2372{
1014 ev_clear_pending ((W)w); 2373 clear_pending (EV_A_ (W)w);
1015 if (!ev_is_active (w)) 2374 if (expect_false (!ev_is_active (w)))
1016 return; 2375 return;
1017 2376
2377 EV_FREQUENT_CHECK;
2378
1018 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2379 wlist_del (&signals [w->signum - 1].head, (WL)w);
1019 ev_stop ((W)w); 2380 ev_stop (EV_A_ (W)w);
1020 2381
1021 if (!signals [w->signum - 1].head) 2382 if (!signals [w->signum - 1].head)
1022 signal (w->signum, SIG_DFL); 2383 signal (w->signum, SIG_DFL);
1023}
1024 2384
2385 EV_FREQUENT_CHECK;
2386}
2387
1025void 2388void
1026ev_idle_start (struct ev_idle *w) 2389ev_child_start (EV_P_ ev_child *w)
1027{ 2390{
2391#if EV_MULTIPLICITY
2392 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2393#endif
1028 if (ev_is_active (w)) 2394 if (expect_false (ev_is_active (w)))
1029 return; 2395 return;
1030 2396
1031 ev_start ((W)w, ++idlecnt); 2397 EV_FREQUENT_CHECK;
1032 array_needsize (idles, idlemax, idlecnt, );
1033 idles [idlecnt - 1] = w;
1034}
1035 2398
2399 ev_start (EV_A_ (W)w, 1);
2400 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2401
2402 EV_FREQUENT_CHECK;
2403}
2404
1036void 2405void
1037ev_idle_stop (struct ev_idle *w) 2406ev_child_stop (EV_P_ ev_child *w)
1038{ 2407{
1039 ev_clear_pending ((W)w); 2408 clear_pending (EV_A_ (W)w);
1040 if (ev_is_active (w)) 2409 if (expect_false (!ev_is_active (w)))
1041 return; 2410 return;
1042 2411
1043 idles [w->active - 1] = idles [--idlecnt]; 2412 EV_FREQUENT_CHECK;
2413
2414 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1044 ev_stop ((W)w); 2415 ev_stop (EV_A_ (W)w);
1045}
1046 2416
1047void 2417 EV_FREQUENT_CHECK;
1048ev_prepare_start (struct ev_prepare *w) 2418}
2419
2420#if EV_STAT_ENABLE
2421
2422# ifdef _WIN32
2423# undef lstat
2424# define lstat(a,b) _stati64 (a,b)
2425# endif
2426
2427#define DEF_STAT_INTERVAL 5.0074891
2428#define MIN_STAT_INTERVAL 0.1074891
2429
2430static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2431
2432#if EV_USE_INOTIFY
2433# define EV_INOTIFY_BUFSIZE 8192
2434
2435static void noinline
2436infy_add (EV_P_ ev_stat *w)
1049{ 2437{
1050 if (ev_is_active (w)) 2438 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);
2439
2440 if (w->wd < 0)
2441 {
2442 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2443
2444 /* monitor some parent directory for speedup hints */
2445 /* note that exceeding the hardcoded limit is not a correctness issue, */
2446 /* but an efficiency issue only */
2447 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2448 {
2449 char path [4096];
2450 strcpy (path, w->path);
2451
2452 do
2453 {
2454 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2455 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2456
2457 char *pend = strrchr (path, '/');
2458
2459 if (!pend)
2460 break; /* whoops, no '/', complain to your admin */
2461
2462 *pend = 0;
2463 w->wd = inotify_add_watch (fs_fd, path, mask);
2464 }
2465 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2466 }
2467 }
2468 else
2469 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2470
2471 if (w->wd >= 0)
2472 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2473}
2474
2475static void noinline
2476infy_del (EV_P_ ev_stat *w)
2477{
2478 int slot;
2479 int wd = w->wd;
2480
2481 if (wd < 0)
1051 return; 2482 return;
1052 2483
2484 w->wd = -2;
2485 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2486 wlist_del (&fs_hash [slot].head, (WL)w);
2487
2488 /* remove this watcher, if others are watching it, they will rearm */
2489 inotify_rm_watch (fs_fd, wd);
2490}
2491
2492static void noinline
2493infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2494{
2495 if (slot < 0)
2496 /* overflow, need to check for all hahs slots */
2497 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2498 infy_wd (EV_A_ slot, wd, ev);
2499 else
2500 {
2501 WL w_;
2502
2503 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2504 {
2505 ev_stat *w = (ev_stat *)w_;
2506 w_ = w_->next; /* lets us remove this watcher and all before it */
2507
2508 if (w->wd == wd || wd == -1)
2509 {
2510 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2511 {
2512 w->wd = -1;
2513 infy_add (EV_A_ w); /* re-add, no matter what */
2514 }
2515
2516 stat_timer_cb (EV_A_ &w->timer, 0);
2517 }
2518 }
2519 }
2520}
2521
2522static void
2523infy_cb (EV_P_ ev_io *w, int revents)
2524{
2525 char buf [EV_INOTIFY_BUFSIZE];
2526 struct inotify_event *ev = (struct inotify_event *)buf;
2527 int ofs;
2528 int len = read (fs_fd, buf, sizeof (buf));
2529
2530 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2531 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2532}
2533
2534void inline_size
2535infy_init (EV_P)
2536{
2537 if (fs_fd != -2)
2538 return;
2539
2540 fs_fd = inotify_init ();
2541
2542 if (fs_fd >= 0)
2543 {
2544 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2545 ev_set_priority (&fs_w, EV_MAXPRI);
2546 ev_io_start (EV_A_ &fs_w);
2547 }
2548}
2549
2550void inline_size
2551infy_fork (EV_P)
2552{
2553 int slot;
2554
2555 if (fs_fd < 0)
2556 return;
2557
2558 close (fs_fd);
2559 fs_fd = inotify_init ();
2560
2561 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2562 {
2563 WL w_ = fs_hash [slot].head;
2564 fs_hash [slot].head = 0;
2565
2566 while (w_)
2567 {
2568 ev_stat *w = (ev_stat *)w_;
2569 w_ = w_->next; /* lets us add this watcher */
2570
2571 w->wd = -1;
2572
2573 if (fs_fd >= 0)
2574 infy_add (EV_A_ w); /* re-add, no matter what */
2575 else
2576 ev_timer_start (EV_A_ &w->timer);
2577 }
2578
2579 }
2580}
2581
2582#endif
2583
2584#ifdef _WIN32
2585# define EV_LSTAT(p,b) _stati64 (p, b)
2586#else
2587# define EV_LSTAT(p,b) lstat (p, b)
2588#endif
2589
2590void
2591ev_stat_stat (EV_P_ ev_stat *w)
2592{
2593 if (lstat (w->path, &w->attr) < 0)
2594 w->attr.st_nlink = 0;
2595 else if (!w->attr.st_nlink)
2596 w->attr.st_nlink = 1;
2597}
2598
2599static void noinline
2600stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2601{
2602 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2603
2604 /* we copy this here each the time so that */
2605 /* prev has the old value when the callback gets invoked */
2606 w->prev = w->attr;
2607 ev_stat_stat (EV_A_ w);
2608
2609 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2610 if (
2611 w->prev.st_dev != w->attr.st_dev
2612 || w->prev.st_ino != w->attr.st_ino
2613 || w->prev.st_mode != w->attr.st_mode
2614 || w->prev.st_nlink != w->attr.st_nlink
2615 || w->prev.st_uid != w->attr.st_uid
2616 || w->prev.st_gid != w->attr.st_gid
2617 || w->prev.st_rdev != w->attr.st_rdev
2618 || w->prev.st_size != w->attr.st_size
2619 || w->prev.st_atime != w->attr.st_atime
2620 || w->prev.st_mtime != w->attr.st_mtime
2621 || w->prev.st_ctime != w->attr.st_ctime
2622 ) {
2623 #if EV_USE_INOTIFY
2624 infy_del (EV_A_ w);
2625 infy_add (EV_A_ w);
2626 ev_stat_stat (EV_A_ w); /* avoid race... */
2627 #endif
2628
2629 ev_feed_event (EV_A_ w, EV_STAT);
2630 }
2631}
2632
2633void
2634ev_stat_start (EV_P_ ev_stat *w)
2635{
2636 if (expect_false (ev_is_active (w)))
2637 return;
2638
2639 /* since we use memcmp, we need to clear any padding data etc. */
2640 memset (&w->prev, 0, sizeof (ev_statdata));
2641 memset (&w->attr, 0, sizeof (ev_statdata));
2642
2643 ev_stat_stat (EV_A_ w);
2644
2645 if (w->interval < MIN_STAT_INTERVAL)
2646 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2647
2648 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2649 ev_set_priority (&w->timer, ev_priority (w));
2650
2651#if EV_USE_INOTIFY
2652 infy_init (EV_A);
2653
2654 if (fs_fd >= 0)
2655 infy_add (EV_A_ w);
2656 else
2657#endif
2658 ev_timer_start (EV_A_ &w->timer);
2659
2660 ev_start (EV_A_ (W)w, 1);
2661
2662 EV_FREQUENT_CHECK;
2663}
2664
2665void
2666ev_stat_stop (EV_P_ ev_stat *w)
2667{
2668 clear_pending (EV_A_ (W)w);
2669 if (expect_false (!ev_is_active (w)))
2670 return;
2671
2672 EV_FREQUENT_CHECK;
2673
2674#if EV_USE_INOTIFY
2675 infy_del (EV_A_ w);
2676#endif
2677 ev_timer_stop (EV_A_ &w->timer);
2678
2679 ev_stop (EV_A_ (W)w);
2680
2681 EV_FREQUENT_CHECK;
2682}
2683#endif
2684
2685#if EV_IDLE_ENABLE
2686void
2687ev_idle_start (EV_P_ ev_idle *w)
2688{
2689 if (expect_false (ev_is_active (w)))
2690 return;
2691
2692 pri_adjust (EV_A_ (W)w);
2693
2694 EV_FREQUENT_CHECK;
2695
2696 {
2697 int active = ++idlecnt [ABSPRI (w)];
2698
2699 ++idleall;
2700 ev_start (EV_A_ (W)w, active);
2701
2702 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2703 idles [ABSPRI (w)][active - 1] = w;
2704 }
2705
2706 EV_FREQUENT_CHECK;
2707}
2708
2709void
2710ev_idle_stop (EV_P_ ev_idle *w)
2711{
2712 clear_pending (EV_A_ (W)w);
2713 if (expect_false (!ev_is_active (w)))
2714 return;
2715
2716 EV_FREQUENT_CHECK;
2717
2718 {
2719 int active = ev_active (w);
2720
2721 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2722 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2723
2724 ev_stop (EV_A_ (W)w);
2725 --idleall;
2726 }
2727
2728 EV_FREQUENT_CHECK;
2729}
2730#endif
2731
2732void
2733ev_prepare_start (EV_P_ ev_prepare *w)
2734{
2735 if (expect_false (ev_is_active (w)))
2736 return;
2737
2738 EV_FREQUENT_CHECK;
2739
1053 ev_start ((W)w, ++preparecnt); 2740 ev_start (EV_A_ (W)w, ++preparecnt);
1054 array_needsize (prepares, preparemax, preparecnt, ); 2741 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1055 prepares [preparecnt - 1] = w; 2742 prepares [preparecnt - 1] = w;
1056}
1057 2743
2744 EV_FREQUENT_CHECK;
2745}
2746
1058void 2747void
1059ev_prepare_stop (struct ev_prepare *w) 2748ev_prepare_stop (EV_P_ ev_prepare *w)
1060{ 2749{
1061 ev_clear_pending ((W)w); 2750 clear_pending (EV_A_ (W)w);
1062 if (ev_is_active (w)) 2751 if (expect_false (!ev_is_active (w)))
1063 return; 2752 return;
1064 2753
2754 EV_FREQUENT_CHECK;
2755
2756 {
2757 int active = ev_active (w);
2758
1065 prepares [w->active - 1] = prepares [--preparecnt]; 2759 prepares [active - 1] = prepares [--preparecnt];
2760 ev_active (prepares [active - 1]) = active;
2761 }
2762
1066 ev_stop ((W)w); 2763 ev_stop (EV_A_ (W)w);
1067}
1068 2764
2765 EV_FREQUENT_CHECK;
2766}
2767
1069void 2768void
1070ev_check_start (struct ev_check *w) 2769ev_check_start (EV_P_ ev_check *w)
1071{ 2770{
1072 if (ev_is_active (w)) 2771 if (expect_false (ev_is_active (w)))
1073 return; 2772 return;
1074 2773
2774 EV_FREQUENT_CHECK;
2775
1075 ev_start ((W)w, ++checkcnt); 2776 ev_start (EV_A_ (W)w, ++checkcnt);
1076 array_needsize (checks, checkmax, checkcnt, ); 2777 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1077 checks [checkcnt - 1] = w; 2778 checks [checkcnt - 1] = w;
1078}
1079 2779
2780 EV_FREQUENT_CHECK;
2781}
2782
1080void 2783void
1081ev_check_stop (struct ev_check *w) 2784ev_check_stop (EV_P_ ev_check *w)
1082{ 2785{
1083 ev_clear_pending ((W)w); 2786 clear_pending (EV_A_ (W)w);
1084 if (ev_is_active (w)) 2787 if (expect_false (!ev_is_active (w)))
1085 return; 2788 return;
1086 2789
2790 EV_FREQUENT_CHECK;
2791
2792 {
2793 int active = ev_active (w);
2794
1087 checks [w->active - 1] = checks [--checkcnt]; 2795 checks [active - 1] = checks [--checkcnt];
2796 ev_active (checks [active - 1]) = active;
2797 }
2798
1088 ev_stop ((W)w); 2799 ev_stop (EV_A_ (W)w);
1089}
1090 2800
1091void 2801 EV_FREQUENT_CHECK;
1092ev_child_start (struct ev_child *w) 2802}
2803
2804#if EV_EMBED_ENABLE
2805void noinline
2806ev_embed_sweep (EV_P_ ev_embed *w)
1093{ 2807{
2808 ev_loop (w->other, EVLOOP_NONBLOCK);
2809}
2810
2811static void
2812embed_io_cb (EV_P_ ev_io *io, int revents)
2813{
2814 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2815
1094 if (ev_is_active (w)) 2816 if (ev_cb (w))
2817 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2818 else
2819 ev_loop (w->other, EVLOOP_NONBLOCK);
2820}
2821
2822static void
2823embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2824{
2825 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2826
2827 {
2828 struct ev_loop *loop = w->other;
2829
2830 while (fdchangecnt)
2831 {
2832 fd_reify (EV_A);
2833 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2834 }
2835 }
2836}
2837
2838static void
2839embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2840{
2841 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2842
2843 {
2844 struct ev_loop *loop = w->other;
2845
2846 ev_loop_fork (EV_A);
2847 }
2848}
2849
2850#if 0
2851static void
2852embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2853{
2854 ev_idle_stop (EV_A_ idle);
2855}
2856#endif
2857
2858void
2859ev_embed_start (EV_P_ ev_embed *w)
2860{
2861 if (expect_false (ev_is_active (w)))
1095 return; 2862 return;
1096 2863
2864 {
2865 struct ev_loop *loop = w->other;
2866 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2867 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2868 }
2869
2870 EV_FREQUENT_CHECK;
2871
2872 ev_set_priority (&w->io, ev_priority (w));
2873 ev_io_start (EV_A_ &w->io);
2874
2875 ev_prepare_init (&w->prepare, embed_prepare_cb);
2876 ev_set_priority (&w->prepare, EV_MINPRI);
2877 ev_prepare_start (EV_A_ &w->prepare);
2878
2879 ev_fork_init (&w->fork, embed_fork_cb);
2880 ev_fork_start (EV_A_ &w->fork);
2881
2882 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2883
1097 ev_start ((W)w, 1); 2884 ev_start (EV_A_ (W)w, 1);
1098 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1099}
1100 2885
2886 EV_FREQUENT_CHECK;
2887}
2888
1101void 2889void
1102ev_child_stop (struct ev_child *w) 2890ev_embed_stop (EV_P_ ev_embed *w)
1103{ 2891{
1104 ev_clear_pending ((W)w); 2892 clear_pending (EV_A_ (W)w);
1105 if (ev_is_active (w)) 2893 if (expect_false (!ev_is_active (w)))
1106 return; 2894 return;
1107 2895
1108 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2896 EV_FREQUENT_CHECK;
2897
2898 ev_io_stop (EV_A_ &w->io);
2899 ev_prepare_stop (EV_A_ &w->prepare);
2900 ev_fork_stop (EV_A_ &w->fork);
2901
2902 EV_FREQUENT_CHECK;
2903}
2904#endif
2905
2906#if EV_FORK_ENABLE
2907void
2908ev_fork_start (EV_P_ ev_fork *w)
2909{
2910 if (expect_false (ev_is_active (w)))
2911 return;
2912
2913 EV_FREQUENT_CHECK;
2914
2915 ev_start (EV_A_ (W)w, ++forkcnt);
2916 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2917 forks [forkcnt - 1] = w;
2918
2919 EV_FREQUENT_CHECK;
2920}
2921
2922void
2923ev_fork_stop (EV_P_ ev_fork *w)
2924{
2925 clear_pending (EV_A_ (W)w);
2926 if (expect_false (!ev_is_active (w)))
2927 return;
2928
2929 EV_FREQUENT_CHECK;
2930
2931 {
2932 int active = ev_active (w);
2933
2934 forks [active - 1] = forks [--forkcnt];
2935 ev_active (forks [active - 1]) = active;
2936 }
2937
1109 ev_stop ((W)w); 2938 ev_stop (EV_A_ (W)w);
2939
2940 EV_FREQUENT_CHECK;
1110} 2941}
2942#endif
2943
2944#if EV_ASYNC_ENABLE
2945void
2946ev_async_start (EV_P_ ev_async *w)
2947{
2948 if (expect_false (ev_is_active (w)))
2949 return;
2950
2951 evpipe_init (EV_A);
2952
2953 EV_FREQUENT_CHECK;
2954
2955 ev_start (EV_A_ (W)w, ++asynccnt);
2956 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2957 asyncs [asynccnt - 1] = w;
2958
2959 EV_FREQUENT_CHECK;
2960}
2961
2962void
2963ev_async_stop (EV_P_ ev_async *w)
2964{
2965 clear_pending (EV_A_ (W)w);
2966 if (expect_false (!ev_is_active (w)))
2967 return;
2968
2969 EV_FREQUENT_CHECK;
2970
2971 {
2972 int active = ev_active (w);
2973
2974 asyncs [active - 1] = asyncs [--asynccnt];
2975 ev_active (asyncs [active - 1]) = active;
2976 }
2977
2978 ev_stop (EV_A_ (W)w);
2979
2980 EV_FREQUENT_CHECK;
2981}
2982
2983void
2984ev_async_send (EV_P_ ev_async *w)
2985{
2986 w->sent = 1;
2987 evpipe_write (EV_A_ &gotasync);
2988}
2989#endif
1111 2990
1112/*****************************************************************************/ 2991/*****************************************************************************/
1113 2992
1114struct ev_once 2993struct ev_once
1115{ 2994{
1116 struct ev_io io; 2995 ev_io io;
1117 struct ev_timer to; 2996 ev_timer to;
1118 void (*cb)(int revents, void *arg); 2997 void (*cb)(int revents, void *arg);
1119 void *arg; 2998 void *arg;
1120}; 2999};
1121 3000
1122static void 3001static void
1123once_cb (struct ev_once *once, int revents) 3002once_cb (EV_P_ struct ev_once *once, int revents)
1124{ 3003{
1125 void (*cb)(int revents, void *arg) = once->cb; 3004 void (*cb)(int revents, void *arg) = once->cb;
1126 void *arg = once->arg; 3005 void *arg = once->arg;
1127 3006
1128 ev_io_stop (&once->io); 3007 ev_io_stop (EV_A_ &once->io);
1129 ev_timer_stop (&once->to); 3008 ev_timer_stop (EV_A_ &once->to);
1130 free (once); 3009 ev_free (once);
1131 3010
1132 cb (revents, arg); 3011 cb (revents, arg);
1133} 3012}
1134 3013
1135static void 3014static void
1136once_cb_io (struct ev_io *w, int revents) 3015once_cb_io (EV_P_ ev_io *w, int revents)
1137{ 3016{
1138 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3017 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1139} 3018}
1140 3019
1141static void 3020static void
1142once_cb_to (struct ev_timer *w, int revents) 3021once_cb_to (EV_P_ ev_timer *w, int revents)
1143{ 3022{
1144 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3023 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1145} 3024}
1146 3025
1147void 3026void
1148ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3027ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1149{ 3028{
1150 struct ev_once *once = malloc (sizeof (struct ev_once)); 3029 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1151 3030
1152 if (!once) 3031 if (expect_false (!once))
3032 {
1153 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3033 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1154 else 3034 return;
1155 { 3035 }
3036
1156 once->cb = cb; 3037 once->cb = cb;
1157 once->arg = arg; 3038 once->arg = arg;
1158 3039
1159 ev_watcher_init (&once->io, once_cb_io); 3040 ev_init (&once->io, once_cb_io);
1160 if (fd >= 0) 3041 if (fd >= 0)
1161 { 3042 {
1162 ev_io_set (&once->io, fd, events); 3043 ev_io_set (&once->io, fd, events);
1163 ev_io_start (&once->io); 3044 ev_io_start (EV_A_ &once->io);
1164 } 3045 }
1165 3046
1166 ev_watcher_init (&once->to, once_cb_to); 3047 ev_init (&once->to, once_cb_to);
1167 if (timeout >= 0.) 3048 if (timeout >= 0.)
1168 { 3049 {
1169 ev_timer_set (&once->to, timeout, 0.); 3050 ev_timer_set (&once->to, timeout, 0.);
1170 ev_timer_start (&once->to); 3051 ev_timer_start (EV_A_ &once->to);
1171 }
1172 }
1173}
1174
1175/*****************************************************************************/
1176
1177#if 0
1178
1179struct ev_io wio;
1180
1181static void
1182sin_cb (struct ev_io *w, int revents)
1183{
1184 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1185}
1186
1187static void
1188ocb (struct ev_timer *w, int revents)
1189{
1190 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1191 ev_timer_stop (w);
1192 ev_timer_start (w);
1193}
1194
1195static void
1196scb (struct ev_signal *w, int revents)
1197{
1198 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1199 ev_io_stop (&wio);
1200 ev_io_start (&wio);
1201}
1202
1203static void
1204gcb (struct ev_signal *w, int revents)
1205{
1206 fprintf (stderr, "generic %x\n", revents);
1207
1208}
1209
1210int main (void)
1211{
1212 ev_init (0);
1213
1214 ev_io_init (&wio, sin_cb, 0, EV_READ);
1215 ev_io_start (&wio);
1216
1217 struct ev_timer t[10000];
1218
1219#if 0
1220 int i;
1221 for (i = 0; i < 10000; ++i)
1222 { 3052 }
1223 struct ev_timer *w = t + i;
1224 ev_watcher_init (w, ocb, i);
1225 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1226 ev_timer_start (w);
1227 if (drand48 () < 0.5)
1228 ev_timer_stop (w);
1229 }
1230#endif
1231
1232 struct ev_timer t1;
1233 ev_timer_init (&t1, ocb, 5, 10);
1234 ev_timer_start (&t1);
1235
1236 struct ev_signal sig;
1237 ev_signal_init (&sig, scb, SIGQUIT);
1238 ev_signal_start (&sig);
1239
1240 struct ev_check cw;
1241 ev_check_init (&cw, gcb);
1242 ev_check_start (&cw);
1243
1244 struct ev_idle iw;
1245 ev_idle_init (&iw, gcb);
1246 ev_idle_start (&iw);
1247
1248 ev_loop (0);
1249
1250 return 0;
1251} 3053}
1252 3054
3055#if EV_MULTIPLICITY
3056 #include "ev_wrap.h"
1253#endif 3057#endif
1254 3058
3059#ifdef __cplusplus
3060}
3061#endif
1255 3062
1256
1257

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