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Comparing libev/ev.c (file contents):
Revision 1.54 by root, Sun Nov 4 00:24:16 2007 UTC vs.
Revision 1.256 by root, Thu Jun 19 06:53:49 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 */
31#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
32# include "config.h" 49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_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>
144#include <time.h>
145
146#include <signal.h>
147
148#ifdef EV_H
149# include EV_H
150#else
151# include "ev.h"
152#endif
153
47#ifndef WIN32 154#ifndef _WIN32
155# include <sys/time.h>
48# include <sys/wait.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
49#endif 164# endif
50#include <sys/time.h> 165#endif
51#include <time.h>
52 166
53/**/ 167/* this block tries to deduce configuration from header-defined symbols and defaults */
54 168
55#ifndef EV_USE_MONOTONIC 169#ifndef EV_USE_MONOTONIC
170# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
56# 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
57#endif 187#endif
58 188
59#ifndef EV_USE_SELECT 189#ifndef EV_USE_SELECT
60# define EV_USE_SELECT 1 190# define EV_USE_SELECT 1
61#endif 191#endif
62 192
63#ifndef EV_USEV_POLL 193#ifndef EV_USE_POLL
64# define EV_USEV_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
65#endif 199#endif
66 200
67#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
68# define EV_USE_EPOLL 0 205# define EV_USE_EPOLL 0
206# endif
69#endif 207#endif
70 208
71#ifndef EV_USE_KQUEUE 209#ifndef EV_USE_KQUEUE
72# define EV_USE_KQUEUE 0 210# define EV_USE_KQUEUE 0
73#endif 211#endif
74 212
75#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))
76# define EV_USE_REALTIME 1 219# define EV_USE_INOTIFY 1
220# else
221# define EV_USE_INOTIFY 0
77#endif 222# endif
223#endif
78 224
79/**/ 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 */
80 268
81#ifndef CLOCK_MONOTONIC 269#ifndef CLOCK_MONOTONIC
82# undef EV_USE_MONOTONIC 270# undef EV_USE_MONOTONIC
83# define EV_USE_MONOTONIC 0 271# define EV_USE_MONOTONIC 0
84#endif 272#endif
… …
86#ifndef CLOCK_REALTIME 274#ifndef CLOCK_REALTIME
87# undef EV_USE_REALTIME 275# undef EV_USE_REALTIME
88# define EV_USE_REALTIME 0 276# define EV_USE_REALTIME 0
89#endif 277#endif
90 278
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
91/**/ 310/**/
92 311
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
93#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) */
94#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) */
95#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
96/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ 330/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
97 331
98#include "ev.h"
99
100#if __GNUC__ >= 3 332#if __GNUC__ >= 4
101# define expect(expr,value) __builtin_expect ((expr),(value)) 333# define expect(expr,value) __builtin_expect ((expr),(value))
102# define inline inline 334# define noinline __attribute__ ((noinline))
103#else 335#else
104# define expect(expr,value) (expr) 336# define expect(expr,value) (expr)
105# define inline static 337# define noinline
338# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
339# define inline
340# endif
106#endif 341#endif
107 342
108#define expect_false(expr) expect ((expr) != 0, 0) 343#define expect_false(expr) expect ((expr) != 0, 0)
109#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
110 352
111#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 353#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
112#define ABSPRI(w) ((w)->priority - EV_MINPRI) 354#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
113 355
356#define EMPTY /* required for microsofts broken pseudo-c compiler */
357#define EMPTY2(a,b) /* used to suppress some warnings */
358
114typedef struct ev_watcher *W; 359typedef ev_watcher *W;
115typedef struct ev_watcher_list *WL; 360typedef ev_watcher_list *WL;
116typedef struct ev_watcher_time *WT; 361typedef ev_watcher_time *WT;
117 362
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 */
118static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 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
119 375
120/*****************************************************************************/ 376/*****************************************************************************/
121 377
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
122typedef struct 443typedef struct
123{ 444{
124 struct ev_watcher_list *head; 445 WL head;
125 unsigned char events; 446 unsigned char events;
126 unsigned char reify; 447 unsigned char reify;
448#if EV_SELECT_IS_WINSOCKET
449 SOCKET handle;
450#endif
127} ANFD; 451} ANFD;
128 452
129typedef struct 453typedef struct
130{ 454{
131 W w; 455 W w;
132 int events; 456 int events;
133} ANPENDING; 457} ANPENDING;
134 458
135#ifdef EV_MULTIPLICITY 459#if EV_USE_INOTIFY
136 460/* hash table entry per inotify-id */
137struct ev_loop 461typedef struct
138{ 462{
139# define VAR(name,decl) decl; 463 WL head;
140# include "ev_vars.h" 464} ANFS;
141}; 465#endif
142# undef VAR
143# include "ev_wrap.h"
144 466
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 */
145#else 477#else
478 typedef WT ANHE;
146 479
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
502 ev_tstamp ev_rt_now;
147# define VAR(name,decl) static decl; 503 #define VAR(name,decl) static decl;
148# include "ev_vars.h" 504 #include "ev_vars.h"
149# undef VAR 505 #undef VAR
506
507 static int ev_default_loop_ptr;
150 508
151#endif 509#endif
152 510
153/*****************************************************************************/ 511/*****************************************************************************/
154 512
155inline ev_tstamp 513ev_tstamp
156ev_time (void) 514ev_time (void)
157{ 515{
158#if EV_USE_REALTIME 516#if EV_USE_REALTIME
159 struct timespec ts; 517 struct timespec ts;
160 clock_gettime (CLOCK_REALTIME, &ts); 518 clock_gettime (CLOCK_REALTIME, &ts);
… …
164 gettimeofday (&tv, 0); 522 gettimeofday (&tv, 0);
165 return tv.tv_sec + tv.tv_usec * 1e-6; 523 return tv.tv_sec + tv.tv_usec * 1e-6;
166#endif 524#endif
167} 525}
168 526
169inline ev_tstamp 527ev_tstamp inline_size
170get_clock (void) 528get_clock (void)
171{ 529{
172#if EV_USE_MONOTONIC 530#if EV_USE_MONOTONIC
173 if (expect_true (have_monotonic)) 531 if (expect_true (have_monotonic))
174 { 532 {
… …
179#endif 537#endif
180 538
181 return ev_time (); 539 return ev_time ();
182} 540}
183 541
542#if EV_MULTIPLICITY
184ev_tstamp 543ev_tstamp
185ev_now (EV_P) 544ev_now (EV_P)
186{ 545{
187 return rt_now; 546 return ev_rt_now;
188} 547}
548#endif
189 549
190#define array_roundsize(base,n) ((n) | 4 & ~3) 550void
191 551ev_sleep (ev_tstamp delay)
192#define array_needsize(base,cur,cnt,init) \ 552{
193 if (expect_false ((cnt) > cur)) \ 553 if (delay > 0.)
194 { \
195 int newcnt = cur; \
196 do \
197 { \
198 newcnt = array_roundsize (base, newcnt << 1); \
199 } \
200 while ((cnt) > newcnt); \
201 \
202 base = realloc (base, sizeof (*base) * (newcnt)); \
203 init (base + cur, newcnt - cur); \
204 cur = newcnt; \
205 } 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 select (0, 0, 0, 0, &tv);
571#endif
572 }
573}
206 574
207/*****************************************************************************/ 575/*****************************************************************************/
208 576
209static void 577#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
578
579int inline_size
580array_nextsize (int elem, int cur, int cnt)
581{
582 int ncur = cur + 1;
583
584 do
585 ncur <<= 1;
586 while (cnt > ncur);
587
588 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
589 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
590 {
591 ncur *= elem;
592 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
593 ncur = ncur - sizeof (void *) * 4;
594 ncur /= elem;
595 }
596
597 return ncur;
598}
599
600static noinline void *
601array_realloc (int elem, void *base, int *cur, int cnt)
602{
603 *cur = array_nextsize (elem, *cur, cnt);
604 return ev_realloc (base, elem * *cur);
605}
606
607#define array_needsize(type,base,cur,cnt,init) \
608 if (expect_false ((cnt) > (cur))) \
609 { \
610 int ocur_ = (cur); \
611 (base) = (type *)array_realloc \
612 (sizeof (type), (base), &(cur), (cnt)); \
613 init ((base) + (ocur_), (cur) - ocur_); \
614 }
615
616#if 0
617#define array_slim(type,stem) \
618 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
619 { \
620 stem ## max = array_roundsize (stem ## cnt >> 1); \
621 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
622 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
623 }
624#endif
625
626#define array_free(stem, idx) \
627 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
628
629/*****************************************************************************/
630
631void noinline
632ev_feed_event (EV_P_ void *w, int revents)
633{
634 W w_ = (W)w;
635 int pri = ABSPRI (w_);
636
637 if (expect_false (w_->pending))
638 pendings [pri][w_->pending - 1].events |= revents;
639 else
640 {
641 w_->pending = ++pendingcnt [pri];
642 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
643 pendings [pri][w_->pending - 1].w = w_;
644 pendings [pri][w_->pending - 1].events = revents;
645 }
646}
647
648void inline_speed
649queue_events (EV_P_ W *events, int eventcnt, int type)
650{
651 int i;
652
653 for (i = 0; i < eventcnt; ++i)
654 ev_feed_event (EV_A_ events [i], type);
655}
656
657/*****************************************************************************/
658
659void inline_size
210anfds_init (ANFD *base, int count) 660anfds_init (ANFD *base, int count)
211{ 661{
212 while (count--) 662 while (count--)
213 { 663 {
214 base->head = 0; 664 base->head = 0;
… …
217 667
218 ++base; 668 ++base;
219 } 669 }
220} 670}
221 671
222static void 672void inline_speed
223event (EV_P_ W w, int events)
224{
225 if (w->pending)
226 {
227 pendings [ABSPRI (w)][w->pending - 1].events |= events;
228 return;
229 }
230
231 w->pending = ++pendingcnt [ABSPRI (w)];
232 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
233 pendings [ABSPRI (w)][w->pending - 1].w = w;
234 pendings [ABSPRI (w)][w->pending - 1].events = events;
235}
236
237static void
238queue_events (EV_P_ W *events, int eventcnt, int type)
239{
240 int i;
241
242 for (i = 0; i < eventcnt; ++i)
243 event (EV_A_ events [i], type);
244}
245
246static void
247fd_event (EV_P_ int fd, int events) 673fd_event (EV_P_ int fd, int revents)
248{ 674{
249 ANFD *anfd = anfds + fd; 675 ANFD *anfd = anfds + fd;
250 struct ev_io *w; 676 ev_io *w;
251 677
252 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 678 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
253 { 679 {
254 int ev = w->events & events; 680 int ev = w->events & revents;
255 681
256 if (ev) 682 if (ev)
257 event (EV_A_ (W)w, ev); 683 ev_feed_event (EV_A_ (W)w, ev);
258 } 684 }
259} 685}
260 686
261/*****************************************************************************/ 687void
688ev_feed_fd_event (EV_P_ int fd, int revents)
689{
690 if (fd >= 0 && fd < anfdmax)
691 fd_event (EV_A_ fd, revents);
692}
262 693
263static void 694void inline_size
264fd_reify (EV_P) 695fd_reify (EV_P)
265{ 696{
266 int i; 697 int i;
267 698
268 for (i = 0; i < fdchangecnt; ++i) 699 for (i = 0; i < fdchangecnt; ++i)
269 { 700 {
270 int fd = fdchanges [i]; 701 int fd = fdchanges [i];
271 ANFD *anfd = anfds + fd; 702 ANFD *anfd = anfds + fd;
272 struct ev_io *w; 703 ev_io *w;
273 704
274 int events = 0; 705 unsigned char events = 0;
275 706
276 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 707 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
277 events |= w->events; 708 events |= (unsigned char)w->events;
278 709
279 anfd->reify = 0; 710#if EV_SELECT_IS_WINSOCKET
280 711 if (events)
281 if (anfd->events != events)
282 { 712 {
283 method_modify (EV_A_ fd, anfd->events, events); 713 unsigned long arg;
284 anfd->events = events; 714 #ifdef EV_FD_TO_WIN32_HANDLE
715 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
716 #else
717 anfd->handle = _get_osfhandle (fd);
718 #endif
719 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
285 } 720 }
721#endif
722
723 {
724 unsigned char o_events = anfd->events;
725 unsigned char o_reify = anfd->reify;
726
727 anfd->reify = 0;
728 anfd->events = events;
729
730 if (o_events != events || o_reify & EV_IOFDSET)
731 backend_modify (EV_A_ fd, o_events, events);
732 }
286 } 733 }
287 734
288 fdchangecnt = 0; 735 fdchangecnt = 0;
289} 736}
290 737
291static void 738void inline_size
292fd_change (EV_P_ int fd) 739fd_change (EV_P_ int fd, int flags)
293{ 740{
294 if (anfds [fd].reify || fdchangecnt < 0) 741 unsigned char reify = anfds [fd].reify;
295 return;
296
297 anfds [fd].reify = 1; 742 anfds [fd].reify |= flags;
298 743
744 if (expect_true (!reify))
745 {
299 ++fdchangecnt; 746 ++fdchangecnt;
300 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 747 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
301 fdchanges [fdchangecnt - 1] = fd; 748 fdchanges [fdchangecnt - 1] = fd;
749 }
302} 750}
303 751
304static void 752void inline_speed
305fd_kill (EV_P_ int fd) 753fd_kill (EV_P_ int fd)
306{ 754{
307 struct ev_io *w; 755 ev_io *w;
308 756
309 while ((w = (struct ev_io *)anfds [fd].head)) 757 while ((w = (ev_io *)anfds [fd].head))
310 { 758 {
311 ev_io_stop (EV_A_ w); 759 ev_io_stop (EV_A_ w);
312 event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 760 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
313 } 761 }
762}
763
764int inline_size
765fd_valid (int fd)
766{
767#ifdef _WIN32
768 return _get_osfhandle (fd) != -1;
769#else
770 return fcntl (fd, F_GETFD) != -1;
771#endif
314} 772}
315 773
316/* called on EBADF to verify fds */ 774/* called on EBADF to verify fds */
317static void 775static void noinline
318fd_ebadf (EV_P) 776fd_ebadf (EV_P)
319{ 777{
320 int fd; 778 int fd;
321 779
322 for (fd = 0; fd < anfdmax; ++fd) 780 for (fd = 0; fd < anfdmax; ++fd)
323 if (anfds [fd].events) 781 if (anfds [fd].events)
324 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 782 if (!fd_valid (fd) && errno == EBADF)
325 fd_kill (EV_A_ fd); 783 fd_kill (EV_A_ fd);
326} 784}
327 785
328/* called on ENOMEM in select/poll to kill some fds and retry */ 786/* called on ENOMEM in select/poll to kill some fds and retry */
329static void 787static void noinline
330fd_enomem (EV_P) 788fd_enomem (EV_P)
331{ 789{
332 int fd = anfdmax; 790 int fd;
333 791
334 while (fd--) 792 for (fd = anfdmax; fd--; )
335 if (anfds [fd].events) 793 if (anfds [fd].events)
336 { 794 {
337 close (fd);
338 fd_kill (EV_A_ fd); 795 fd_kill (EV_A_ fd);
339 return; 796 return;
340 } 797 }
341} 798}
342 799
800/* usually called after fork if backend needs to re-arm all fds from scratch */
801static void noinline
802fd_rearm_all (EV_P)
803{
804 int fd;
805
806 for (fd = 0; fd < anfdmax; ++fd)
807 if (anfds [fd].events)
808 {
809 anfds [fd].events = 0;
810 fd_change (EV_A_ fd, EV_IOFDSET | 1);
811 }
812}
813
343/*****************************************************************************/ 814/*****************************************************************************/
344 815
345static void 816/*
346upheap (WT *heap, int k) 817 * the heap functions want a real array index. array index 0 uis guaranteed to not
347{ 818 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
348 WT w = heap [k]; 819 * the branching factor of the d-tree.
820 */
349 821
350 while (k && heap [k >> 1]->at > w->at) 822/*
351 { 823 * at the moment we allow libev the luxury of two heaps,
352 heap [k] = heap [k >> 1]; 824 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
353 heap [k]->active = k + 1; 825 * which is more cache-efficient.
354 k >>= 1; 826 * the difference is about 5% with 50000+ watchers.
355 } 827 */
828#if EV_USE_4HEAP
356 829
357 heap [k] = w; 830#define DHEAP 4
358 heap [k]->active = k + 1; 831#define HEAP0 (DHEAP - 1) /* index of first element in heap */
832#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
833#define UPHEAP_DONE(p,k) ((p) == (k))
359 834
360} 835/* away from the root */
361 836void inline_speed
362static void
363downheap (WT *heap, int N, int k) 837downheap (ANHE *heap, int N, int k)
364{ 838{
365 WT w = heap [k]; 839 ANHE he = heap [k];
840 ANHE *E = heap + N + HEAP0;
366 841
367 while (k < (N >> 1)) 842 for (;;)
368 { 843 {
369 int j = k << 1; 844 ev_tstamp minat;
845 ANHE *minpos;
846 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
370 847
371 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 848 /* find minimum child */
849 if (expect_true (pos + DHEAP - 1 < E))
372 ++j; 850 {
373 851 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
374 if (w->at <= heap [j]->at) 852 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
853 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
854 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
855 }
856 else if (pos < E)
857 {
858 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
859 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
860 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
861 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
862 }
863 else
375 break; 864 break;
376 865
866 if (ANHE_at (he) <= minat)
867 break;
868
869 heap [k] = *minpos;
870 ev_active (ANHE_w (*minpos)) = k;
871
872 k = minpos - heap;
873 }
874
875 heap [k] = he;
876 ev_active (ANHE_w (he)) = k;
877}
878
879#else /* 4HEAP */
880
881#define HEAP0 1
882#define HPARENT(k) ((k) >> 1)
883#define UPHEAP_DONE(p,k) (!(p))
884
885/* away from the root */
886void inline_speed
887downheap (ANHE *heap, int N, int k)
888{
889 ANHE he = heap [k];
890
891 for (;;)
892 {
893 int c = k << 1;
894
895 if (c > N + HEAP0 - 1)
896 break;
897
898 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
899 ? 1 : 0;
900
901 if (ANHE_at (he) <= ANHE_at (heap [c]))
902 break;
903
377 heap [k] = heap [j]; 904 heap [k] = heap [c];
378 heap [k]->active = k + 1; 905 ev_active (ANHE_w (heap [k])) = k;
906
379 k = j; 907 k = c;
380 } 908 }
381 909
382 heap [k] = w; 910 heap [k] = he;
383 heap [k]->active = k + 1; 911 ev_active (ANHE_w (he)) = k;
912}
913#endif
914
915/* towards the root */
916void inline_speed
917upheap (ANHE *heap, int k)
918{
919 ANHE he = heap [k];
920
921 for (;;)
922 {
923 int p = HPARENT (k);
924
925 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
926 break;
927
928 heap [k] = heap [p];
929 ev_active (ANHE_w (heap [k])) = k;
930 k = p;
931 }
932
933 heap [k] = he;
934 ev_active (ANHE_w (he)) = k;
935}
936
937void inline_size
938adjustheap (ANHE *heap, int N, int k)
939{
940 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
941 upheap (heap, k);
942 else
943 downheap (heap, N, k);
944}
945
946/* rebuild the heap: this function is used only once and executed rarely */
947void inline_size
948reheap (ANHE *heap, int N)
949{
950 int i;
951
952 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
953 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
954 for (i = 0; i < N; ++i)
955 upheap (heap, i + HEAP0);
384} 956}
385 957
386/*****************************************************************************/ 958/*****************************************************************************/
387 959
388typedef struct 960typedef struct
389{ 961{
390 struct ev_watcher_list *head; 962 WL head;
391 sig_atomic_t volatile gotsig; 963 EV_ATOMIC_T gotsig;
392} ANSIG; 964} ANSIG;
393 965
394static ANSIG *signals; 966static ANSIG *signals;
395static int signalmax; 967static int signalmax;
396 968
397static int sigpipe [2]; 969static EV_ATOMIC_T gotsig;
398static sig_atomic_t volatile gotsig;
399 970
400static void 971void inline_size
401signals_init (ANSIG *base, int count) 972signals_init (ANSIG *base, int count)
402{ 973{
403 while (count--) 974 while (count--)
404 { 975 {
405 base->head = 0; 976 base->head = 0;
… …
407 978
408 ++base; 979 ++base;
409 } 980 }
410} 981}
411 982
983/*****************************************************************************/
984
985void inline_speed
986fd_intern (int fd)
987{
988#ifdef _WIN32
989 unsigned long arg = 1;
990 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
991#else
992 fcntl (fd, F_SETFD, FD_CLOEXEC);
993 fcntl (fd, F_SETFL, O_NONBLOCK);
994#endif
995}
996
997static void noinline
998evpipe_init (EV_P)
999{
1000 if (!ev_is_active (&pipeev))
1001 {
1002#if EV_USE_EVENTFD
1003 if ((evfd = eventfd (0, 0)) >= 0)
1004 {
1005 evpipe [0] = -1;
1006 fd_intern (evfd);
1007 ev_io_set (&pipeev, evfd, EV_READ);
1008 }
1009 else
1010#endif
1011 {
1012 while (pipe (evpipe))
1013 syserr ("(libev) error creating signal/async pipe");
1014
1015 fd_intern (evpipe [0]);
1016 fd_intern (evpipe [1]);
1017 ev_io_set (&pipeev, evpipe [0], EV_READ);
1018 }
1019
1020 ev_io_start (EV_A_ &pipeev);
1021 ev_unref (EV_A); /* watcher should not keep loop alive */
1022 }
1023}
1024
1025void inline_size
1026evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1027{
1028 if (!*flag)
1029 {
1030 int old_errno = errno; /* save errno because write might clobber it */
1031
1032 *flag = 1;
1033
1034#if EV_USE_EVENTFD
1035 if (evfd >= 0)
1036 {
1037 uint64_t counter = 1;
1038 write (evfd, &counter, sizeof (uint64_t));
1039 }
1040 else
1041#endif
1042 write (evpipe [1], &old_errno, 1);
1043
1044 errno = old_errno;
1045 }
1046}
1047
412static void 1048static void
1049pipecb (EV_P_ ev_io *iow, int revents)
1050{
1051#if EV_USE_EVENTFD
1052 if (evfd >= 0)
1053 {
1054 uint64_t counter;
1055 read (evfd, &counter, sizeof (uint64_t));
1056 }
1057 else
1058#endif
1059 {
1060 char dummy;
1061 read (evpipe [0], &dummy, 1);
1062 }
1063
1064 if (gotsig && ev_is_default_loop (EV_A))
1065 {
1066 int signum;
1067 gotsig = 0;
1068
1069 for (signum = signalmax; signum--; )
1070 if (signals [signum].gotsig)
1071 ev_feed_signal_event (EV_A_ signum + 1);
1072 }
1073
1074#if EV_ASYNC_ENABLE
1075 if (gotasync)
1076 {
1077 int i;
1078 gotasync = 0;
1079
1080 for (i = asynccnt; i--; )
1081 if (asyncs [i]->sent)
1082 {
1083 asyncs [i]->sent = 0;
1084 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1085 }
1086 }
1087#endif
1088}
1089
1090/*****************************************************************************/
1091
1092static void
413sighandler (int signum) 1093ev_sighandler (int signum)
414{ 1094{
1095#if EV_MULTIPLICITY
1096 struct ev_loop *loop = &default_loop_struct;
1097#endif
1098
1099#if _WIN32
1100 signal (signum, ev_sighandler);
1101#endif
1102
415 signals [signum - 1].gotsig = 1; 1103 signals [signum - 1].gotsig = 1;
416 1104 evpipe_write (EV_A_ &gotsig);
417 if (!gotsig)
418 {
419 int old_errno = errno;
420 gotsig = 1;
421 write (sigpipe [1], &signum, 1);
422 errno = old_errno;
423 }
424} 1105}
425 1106
426static void 1107void noinline
427sigcb (EV_P_ struct ev_io *iow, int revents) 1108ev_feed_signal_event (EV_P_ int signum)
428{ 1109{
429 struct ev_watcher_list *w; 1110 WL w;
1111
1112#if EV_MULTIPLICITY
1113 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1114#endif
1115
430 int signum; 1116 --signum;
431 1117
432 read (sigpipe [0], &revents, 1); 1118 if (signum < 0 || signum >= signalmax)
433 gotsig = 0; 1119 return;
434 1120
435 for (signum = signalmax; signum--; )
436 if (signals [signum].gotsig)
437 {
438 signals [signum].gotsig = 0; 1121 signals [signum].gotsig = 0;
439 1122
440 for (w = signals [signum].head; w; w = w->next) 1123 for (w = signals [signum].head; w; w = w->next)
441 event (EV_A_ (W)w, EV_SIGNAL); 1124 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
442 }
443}
444
445static void
446siginit (EV_P)
447{
448#ifndef WIN32
449 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
450 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
451
452 /* rather than sort out wether we really need nb, set it */
453 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
454 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
455#endif
456
457 ev_io_set (&sigev, sigpipe [0], EV_READ);
458 ev_io_start (EV_A_ &sigev);
459 ev_unref (EV_A); /* child watcher should not keep loop alive */
460} 1125}
461 1126
462/*****************************************************************************/ 1127/*****************************************************************************/
463 1128
1129static WL childs [EV_PID_HASHSIZE];
1130
464#ifndef WIN32 1131#ifndef _WIN32
1132
1133static ev_signal childev;
1134
1135#ifndef WIFCONTINUED
1136# define WIFCONTINUED(status) 0
1137#endif
1138
1139void inline_speed
1140child_reap (EV_P_ int chain, int pid, int status)
1141{
1142 ev_child *w;
1143 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1144
1145 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1146 {
1147 if ((w->pid == pid || !w->pid)
1148 && (!traced || (w->flags & 1)))
1149 {
1150 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1151 w->rpid = pid;
1152 w->rstatus = status;
1153 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1154 }
1155 }
1156}
465 1157
466#ifndef WCONTINUED 1158#ifndef WCONTINUED
467# define WCONTINUED 0 1159# define WCONTINUED 0
468#endif 1160#endif
469 1161
470static void 1162static void
471child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
472{
473 struct ev_child *w;
474
475 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
476 if (w->pid == pid || !w->pid)
477 {
478 w->priority = sw->priority; /* need to do it *now* */
479 w->rpid = pid;
480 w->rstatus = status;
481 event (EV_A_ (W)w, EV_CHILD);
482 }
483}
484
485static void
486childcb (EV_P_ struct ev_signal *sw, int revents) 1163childcb (EV_P_ ev_signal *sw, int revents)
487{ 1164{
488 int pid, status; 1165 int pid, status;
489 1166
1167 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
490 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1168 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
491 { 1169 if (!WCONTINUED
1170 || errno != EINVAL
1171 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1172 return;
1173
492 /* make sure we are called again until all childs have been reaped */ 1174 /* make sure we are called again until all children have been reaped */
1175 /* we need to do it this way so that the callback gets called before we continue */
493 event (EV_A_ (W)sw, EV_SIGNAL); 1176 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
494 1177
495 child_reap (EV_A_ sw, pid, pid, status); 1178 child_reap (EV_A_ pid, pid, status);
1179 if (EV_PID_HASHSIZE > 1)
496 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1180 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
497 }
498} 1181}
499 1182
500#endif 1183#endif
501 1184
502/*****************************************************************************/ 1185/*****************************************************************************/
503 1186
1187#if EV_USE_PORT
1188# include "ev_port.c"
1189#endif
504#if EV_USE_KQUEUE 1190#if EV_USE_KQUEUE
505# include "ev_kqueue.c" 1191# include "ev_kqueue.c"
506#endif 1192#endif
507#if EV_USE_EPOLL 1193#if EV_USE_EPOLL
508# include "ev_epoll.c" 1194# include "ev_epoll.c"
509#endif 1195#endif
510#if EV_USEV_POLL 1196#if EV_USE_POLL
511# include "ev_poll.c" 1197# include "ev_poll.c"
512#endif 1198#endif
513#if EV_USE_SELECT 1199#if EV_USE_SELECT
514# include "ev_select.c" 1200# include "ev_select.c"
515#endif 1201#endif
… …
525{ 1211{
526 return EV_VERSION_MINOR; 1212 return EV_VERSION_MINOR;
527} 1213}
528 1214
529/* return true if we are running with elevated privileges and should ignore env variables */ 1215/* return true if we are running with elevated privileges and should ignore env variables */
530static int 1216int inline_size
531enable_secure (void) 1217enable_secure (void)
532{ 1218{
533#ifdef WIN32 1219#ifdef _WIN32
534 return 0; 1220 return 0;
535#else 1221#else
536 return getuid () != geteuid () 1222 return getuid () != geteuid ()
537 || getgid () != getegid (); 1223 || getgid () != getegid ();
538#endif 1224#endif
539} 1225}
540 1226
541int 1227unsigned int
542ev_method (EV_P) 1228ev_supported_backends (void)
543{ 1229{
544 return method; 1230 unsigned int flags = 0;
545}
546 1231
547static void 1232 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
548loop_init (EV_P_ int methods) 1233 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1234 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1235 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1236 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1237
1238 return flags;
1239}
1240
1241unsigned int
1242ev_recommended_backends (void)
549{ 1243{
550 if (!method) 1244 unsigned int flags = ev_supported_backends ();
1245
1246#ifndef __NetBSD__
1247 /* kqueue is borked on everything but netbsd apparently */
1248 /* it usually doesn't work correctly on anything but sockets and pipes */
1249 flags &= ~EVBACKEND_KQUEUE;
1250#endif
1251#ifdef __APPLE__
1252 // flags &= ~EVBACKEND_KQUEUE; for documentation
1253 flags &= ~EVBACKEND_POLL;
1254#endif
1255
1256 return flags;
1257}
1258
1259unsigned int
1260ev_embeddable_backends (void)
1261{
1262 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1263
1264 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1265 /* please fix it and tell me how to detect the fix */
1266 flags &= ~EVBACKEND_EPOLL;
1267
1268 return flags;
1269}
1270
1271unsigned int
1272ev_backend (EV_P)
1273{
1274 return backend;
1275}
1276
1277unsigned int
1278ev_loop_count (EV_P)
1279{
1280 return loop_count;
1281}
1282
1283void
1284ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1285{
1286 io_blocktime = interval;
1287}
1288
1289void
1290ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1291{
1292 timeout_blocktime = interval;
1293}
1294
1295static void noinline
1296loop_init (EV_P_ unsigned int flags)
1297{
1298 if (!backend)
551 { 1299 {
552#if EV_USE_MONOTONIC 1300#if EV_USE_MONOTONIC
553 { 1301 {
554 struct timespec ts; 1302 struct timespec ts;
555 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1303 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
556 have_monotonic = 1; 1304 have_monotonic = 1;
557 } 1305 }
558#endif 1306#endif
559 1307
560 rt_now = ev_time (); 1308 ev_rt_now = ev_time ();
561 mn_now = get_clock (); 1309 mn_now = get_clock ();
562 now_floor = mn_now; 1310 now_floor = mn_now;
563 rtmn_diff = rt_now - mn_now; 1311 rtmn_diff = ev_rt_now - mn_now;
564 1312
565 if (pipe (sigpipe)) 1313 io_blocktime = 0.;
566 return 0; 1314 timeout_blocktime = 0.;
1315 backend = 0;
1316 backend_fd = -1;
1317 gotasync = 0;
1318#if EV_USE_INOTIFY
1319 fs_fd = -2;
1320#endif
567 1321
568 if (methods == EVMETHOD_AUTO) 1322 /* pid check not overridable via env */
569 if (!enable_secure () && getenv ("LIBmethodS")) 1323#ifndef _WIN32
570 methods = atoi (getenv ("LIBmethodS")); 1324 if (flags & EVFLAG_FORKCHECK)
571 else 1325 curpid = getpid ();
572 methods = EVMETHOD_ANY; 1326#endif
573 1327
574 method = 0; 1328 if (!(flags & EVFLAG_NOENV)
1329 && !enable_secure ()
1330 && getenv ("LIBEV_FLAGS"))
1331 flags = atoi (getenv ("LIBEV_FLAGS"));
1332
1333 if (!(flags & 0x0000ffffU))
1334 flags |= ev_recommended_backends ();
1335
1336#if EV_USE_PORT
1337 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1338#endif
575#if EV_USE_KQUEUE 1339#if EV_USE_KQUEUE
576 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 1340 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
577#endif 1341#endif
578#if EV_USE_EPOLL 1342#if EV_USE_EPOLL
579 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 1343 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
580#endif 1344#endif
581#if EV_USEV_POLL 1345#if EV_USE_POLL
582 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 1346 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
583#endif 1347#endif
584#if EV_USE_SELECT 1348#if EV_USE_SELECT
585 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 1349 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
586#endif 1350#endif
587 1351
588 if (method) 1352 ev_init (&pipeev, pipecb);
1353 ev_set_priority (&pipeev, EV_MAXPRI);
1354 }
1355}
1356
1357static void noinline
1358loop_destroy (EV_P)
1359{
1360 int i;
1361
1362 if (ev_is_active (&pipeev))
1363 {
1364 ev_ref (EV_A); /* signal watcher */
1365 ev_io_stop (EV_A_ &pipeev);
1366
1367#if EV_USE_EVENTFD
1368 if (evfd >= 0)
1369 close (evfd);
1370#endif
1371
1372 if (evpipe [0] >= 0)
589 { 1373 {
590 ev_watcher_init (&sigev, sigcb); 1374 close (evpipe [0]);
591 ev_set_priority (&sigev, EV_MAXPRI); 1375 close (evpipe [1]);
1376 }
1377 }
1378
1379#if EV_USE_INOTIFY
1380 if (fs_fd >= 0)
1381 close (fs_fd);
1382#endif
1383
1384 if (backend_fd >= 0)
1385 close (backend_fd);
1386
1387#if EV_USE_PORT
1388 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1389#endif
1390#if EV_USE_KQUEUE
1391 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1392#endif
1393#if EV_USE_EPOLL
1394 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1395#endif
1396#if EV_USE_POLL
1397 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1398#endif
1399#if EV_USE_SELECT
1400 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1401#endif
1402
1403 for (i = NUMPRI; i--; )
1404 {
1405 array_free (pending, [i]);
1406#if EV_IDLE_ENABLE
1407 array_free (idle, [i]);
1408#endif
1409 }
1410
1411 ev_free (anfds); anfdmax = 0;
1412
1413 /* have to use the microsoft-never-gets-it-right macro */
1414 array_free (fdchange, EMPTY);
1415 array_free (timer, EMPTY);
1416#if EV_PERIODIC_ENABLE
1417 array_free (periodic, EMPTY);
1418#endif
1419#if EV_FORK_ENABLE
1420 array_free (fork, EMPTY);
1421#endif
1422 array_free (prepare, EMPTY);
1423 array_free (check, EMPTY);
1424#if EV_ASYNC_ENABLE
1425 array_free (async, EMPTY);
1426#endif
1427
1428 backend = 0;
1429}
1430
1431#if EV_USE_INOTIFY
1432void inline_size infy_fork (EV_P);
1433#endif
1434
1435void inline_size
1436loop_fork (EV_P)
1437{
1438#if EV_USE_PORT
1439 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1440#endif
1441#if EV_USE_KQUEUE
1442 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1443#endif
1444#if EV_USE_EPOLL
1445 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1446#endif
1447#if EV_USE_INOTIFY
1448 infy_fork (EV_A);
1449#endif
1450
1451 if (ev_is_active (&pipeev))
1452 {
1453 /* this "locks" the handlers against writing to the pipe */
1454 /* while we modify the fd vars */
1455 gotsig = 1;
1456#if EV_ASYNC_ENABLE
1457 gotasync = 1;
1458#endif
1459
1460 ev_ref (EV_A);
1461 ev_io_stop (EV_A_ &pipeev);
1462
1463#if EV_USE_EVENTFD
1464 if (evfd >= 0)
1465 close (evfd);
1466#endif
1467
1468 if (evpipe [0] >= 0)
1469 {
1470 close (evpipe [0]);
1471 close (evpipe [1]);
1472 }
1473
592 siginit (EV_A); 1474 evpipe_init (EV_A);
1475 /* now iterate over everything, in case we missed something */
1476 pipecb (EV_A_ &pipeev, EV_READ);
1477 }
593 1478
1479 postfork = 0;
1480}
1481
1482#if EV_MULTIPLICITY
1483
1484struct ev_loop *
1485ev_loop_new (unsigned int flags)
1486{
1487 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1488
1489 memset (loop, 0, sizeof (struct ev_loop));
1490
1491 loop_init (EV_A_ flags);
1492
1493 if (ev_backend (EV_A))
1494 return loop;
1495
1496 return 0;
1497}
1498
1499void
1500ev_loop_destroy (EV_P)
1501{
1502 loop_destroy (EV_A);
1503 ev_free (loop);
1504}
1505
1506void
1507ev_loop_fork (EV_P)
1508{
1509 postfork = 1; /* must be in line with ev_default_fork */
1510}
1511
1512#if EV_VERIFY
1513void noinline
1514verify_watcher (EV_P_ W w)
1515{
1516 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1517
1518 if (w->pending)
1519 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1520}
1521
1522static void noinline
1523verify_heap (EV_P_ ANHE *heap, int N)
1524{
1525 int i;
1526
1527 for (i = HEAP0; i < N + HEAP0; ++i)
1528 {
1529 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1530 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1531 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1532
1533 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1534 }
1535}
1536
1537static void noinline
1538array_verify (EV_P_ W *ws, int cnt)
1539{
1540 while (cnt--)
1541 {
1542 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1543 verify_watcher (EV_A_ ws [cnt]);
1544 }
1545}
1546#endif
1547
1548void
1549ev_loop_verify (EV_P)
1550{
1551#if EV_VERIFY
1552 int i;
1553 WL w;
1554
1555 assert (activecnt >= -1);
1556
1557 assert (fdchangemax >= fdchangecnt);
1558 for (i = 0; i < fdchangecnt; ++i)
1559 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1560
1561 assert (anfdmax >= 0);
1562 for (i = 0; i < anfdmax; ++i)
1563 for (w = anfds [i].head; w; w = w->next)
1564 {
1565 verify_watcher (EV_A_ (W)w);
1566 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
1567 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1568 }
1569
1570 assert (timermax >= timercnt);
1571 verify_heap (EV_A_ timers, timercnt);
1572
1573#if EV_PERIODIC_ENABLE
1574 assert (periodicmax >= periodiccnt);
1575 verify_heap (EV_A_ periodics, periodiccnt);
1576#endif
1577
1578 for (i = NUMPRI; i--; )
1579 {
1580 assert (pendingmax [i] >= pendingcnt [i]);
1581#if EV_IDLE_ENABLE
1582 assert (idleall >= 0);
1583 assert (idlemax [i] >= idlecnt [i]);
1584 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1585#endif
1586 }
1587
1588#if EV_FORK_ENABLE
1589 assert (forkmax >= forkcnt);
1590 array_verify (EV_A_ (W *)forks, forkcnt);
1591#endif
1592
1593#if EV_ASYNC_ENABLE
1594 assert (asyncmax >= asynccnt);
1595 array_verify (EV_A_ (W *)asyncs, asynccnt);
1596#endif
1597
1598 assert (preparemax >= preparecnt);
1599 array_verify (EV_A_ (W *)prepares, preparecnt);
1600
1601 assert (checkmax >= checkcnt);
1602 array_verify (EV_A_ (W *)checks, checkcnt);
1603
1604# if 0
1605 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1606 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1607# endif
1608#endif
1609}
1610
1611#endif /* multiplicity */
1612
1613#if EV_MULTIPLICITY
1614struct ev_loop *
1615ev_default_loop_init (unsigned int flags)
1616#else
1617int
1618ev_default_loop (unsigned int flags)
1619#endif
1620{
1621 if (!ev_default_loop_ptr)
1622 {
1623#if EV_MULTIPLICITY
1624 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1625#else
1626 ev_default_loop_ptr = 1;
1627#endif
1628
1629 loop_init (EV_A_ flags);
1630
1631 if (ev_backend (EV_A))
1632 {
594#ifndef WIN32 1633#ifndef _WIN32
595 ev_signal_init (&childev, childcb, SIGCHLD); 1634 ev_signal_init (&childev, childcb, SIGCHLD);
596 ev_set_priority (&childev, EV_MAXPRI); 1635 ev_set_priority (&childev, EV_MAXPRI);
597 ev_signal_start (EV_A_ &childev); 1636 ev_signal_start (EV_A_ &childev);
598 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1637 ev_unref (EV_A); /* child watcher should not keep loop alive */
599#endif 1638#endif
600 } 1639 }
1640 else
1641 ev_default_loop_ptr = 0;
601 } 1642 }
602 1643
603 return method; 1644 return ev_default_loop_ptr;
604} 1645}
605 1646
1647void
1648ev_default_destroy (void)
1649{
606#ifdef EV_MULTIPLICITY 1650#if EV_MULTIPLICITY
607 1651 struct ev_loop *loop = ev_default_loop_ptr;
608struct ev_loop *
609ev_loop_new (int methods)
610{
611 struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
612
613 loop_init (EV_A_ methods);
614
615 return loop;
616}
617
618void
619ev_loop_delete (EV_P)
620{
621 /*TODO*/
622 free (loop);
623}
624
625#else
626
627int
628ev_init (int methods)
629{
630 loop_init ();
631}
632
633#endif 1652#endif
1653
1654#ifndef _WIN32
1655 ev_ref (EV_A); /* child watcher */
1656 ev_signal_stop (EV_A_ &childev);
1657#endif
1658
1659 loop_destroy (EV_A);
1660}
1661
1662void
1663ev_default_fork (void)
1664{
1665#if EV_MULTIPLICITY
1666 struct ev_loop *loop = ev_default_loop_ptr;
1667#endif
1668
1669 if (backend)
1670 postfork = 1; /* must be in line with ev_loop_fork */
1671}
634 1672
635/*****************************************************************************/ 1673/*****************************************************************************/
636 1674
637void 1675void
638ev_fork_prepare (void) 1676ev_invoke (EV_P_ void *w, int revents)
639{ 1677{
640 /* nop */ 1678 EV_CB_INVOKE ((W)w, revents);
641} 1679}
642 1680
643void 1681void inline_speed
644ev_fork_parent (void)
645{
646 /* nop */
647}
648
649void
650ev_fork_child (void)
651{
652 /*TODO*/
653#if !EV_MULTIPLICITY
654#if EV_USE_EPOLL
655 if (method == EVMETHOD_EPOLL)
656 epoll_postfork_child (EV_A);
657#endif
658
659 ev_io_stop (EV_A_ &sigev);
660 close (sigpipe [0]);
661 close (sigpipe [1]);
662 pipe (sigpipe);
663 siginit (EV_A);
664#endif
665}
666
667/*****************************************************************************/
668
669static void
670call_pending (EV_P) 1682call_pending (EV_P)
671{ 1683{
672 int pri; 1684 int pri;
673 1685
674 for (pri = NUMPRI; pri--; ) 1686 for (pri = NUMPRI; pri--; )
675 while (pendingcnt [pri]) 1687 while (pendingcnt [pri])
676 { 1688 {
677 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1689 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
678 1690
679 if (p->w) 1691 if (expect_true (p->w))
680 { 1692 {
1693 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1694
681 p->w->pending = 0; 1695 p->w->pending = 0;
682 p->w->cb (EV_A_ p->w, p->events); 1696 EV_CB_INVOKE (p->w, p->events);
1697 EV_FREQUENT_CHECK;
683 } 1698 }
684 } 1699 }
685} 1700}
686 1701
687static void 1702#if EV_IDLE_ENABLE
1703void inline_size
1704idle_reify (EV_P)
1705{
1706 if (expect_false (idleall))
1707 {
1708 int pri;
1709
1710 for (pri = NUMPRI; pri--; )
1711 {
1712 if (pendingcnt [pri])
1713 break;
1714
1715 if (idlecnt [pri])
1716 {
1717 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1718 break;
1719 }
1720 }
1721 }
1722}
1723#endif
1724
1725void inline_size
688timers_reify (EV_P) 1726timers_reify (EV_P)
689{ 1727{
1728 EV_FREQUENT_CHECK;
1729
690 while (timercnt && timers [0]->at <= mn_now) 1730 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
691 { 1731 {
692 struct ev_timer *w = timers [0]; 1732 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1733
1734 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
693 1735
694 /* first reschedule or stop timer */ 1736 /* first reschedule or stop timer */
695 if (w->repeat) 1737 if (w->repeat)
696 { 1738 {
1739 ev_at (w) += w->repeat;
1740 if (ev_at (w) < mn_now)
1741 ev_at (w) = mn_now;
1742
697 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1743 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
698 w->at = mn_now + w->repeat; 1744
1745 ANHE_at_cache (timers [HEAP0]);
699 downheap ((WT *)timers, timercnt, 0); 1746 downheap (timers, timercnt, HEAP0);
700 } 1747 }
701 else 1748 else
702 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1749 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
703 1750
1751 EV_FREQUENT_CHECK;
704 event (EV_A_ (W)w, EV_TIMEOUT); 1752 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
705 } 1753 }
706} 1754}
707 1755
708static void 1756#if EV_PERIODIC_ENABLE
1757void inline_size
709periodics_reify (EV_P) 1758periodics_reify (EV_P)
710{ 1759{
1760 EV_FREQUENT_CHECK;
1761
711 while (periodiccnt && periodics [0]->at <= rt_now) 1762 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
712 { 1763 {
713 struct ev_periodic *w = periodics [0]; 1764 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1765
1766 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
714 1767
715 /* first reschedule or stop timer */ 1768 /* first reschedule or stop timer */
716 if (w->interval) 1769 if (w->reschedule_cb)
717 { 1770 {
718 w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval; 1771 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
719 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now)); 1772
1773 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1774
1775 ANHE_at_cache (periodics [HEAP0]);
720 downheap ((WT *)periodics, periodiccnt, 0); 1776 downheap (periodics, periodiccnt, HEAP0);
1777 }
1778 else if (w->interval)
1779 {
1780 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1781 /* if next trigger time is not sufficiently in the future, put it there */
1782 /* this might happen because of floating point inexactness */
1783 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1784 {
1785 ev_at (w) += w->interval;
1786
1787 /* if interval is unreasonably low we might still have a time in the past */
1788 /* so correct this. this will make the periodic very inexact, but the user */
1789 /* has effectively asked to get triggered more often than possible */
1790 if (ev_at (w) < ev_rt_now)
1791 ev_at (w) = ev_rt_now;
1792 }
1793
1794 ANHE_at_cache (periodics [HEAP0]);
1795 downheap (periodics, periodiccnt, HEAP0);
721 } 1796 }
722 else 1797 else
723 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1798 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
724 1799
1800 EV_FREQUENT_CHECK;
725 event (EV_A_ (W)w, EV_PERIODIC); 1801 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
726 } 1802 }
727} 1803}
728 1804
729static void 1805static void noinline
730periodics_reschedule (EV_P) 1806periodics_reschedule (EV_P)
731{ 1807{
732 int i; 1808 int i;
733 1809
734 /* adjust periodics after time jump */ 1810 /* adjust periodics after time jump */
735 for (i = 0; i < periodiccnt; ++i) 1811 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
736 { 1812 {
737 struct ev_periodic *w = periodics [i]; 1813 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
738 1814
1815 if (w->reschedule_cb)
1816 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
739 if (w->interval) 1817 else if (w->interval)
1818 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1819
1820 ANHE_at_cache (periodics [i]);
1821 }
1822
1823 reheap (periodics, periodiccnt);
1824}
1825#endif
1826
1827void inline_speed
1828time_update (EV_P_ ev_tstamp max_block)
1829{
1830 int i;
1831
1832#if EV_USE_MONOTONIC
1833 if (expect_true (have_monotonic))
1834 {
1835 ev_tstamp odiff = rtmn_diff;
1836
1837 mn_now = get_clock ();
1838
1839 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1840 /* interpolate in the meantime */
1841 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
740 { 1842 {
741 ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval; 1843 ev_rt_now = rtmn_diff + mn_now;
1844 return;
1845 }
742 1846
743 if (fabs (diff) >= 1e-4) 1847 now_floor = mn_now;
1848 ev_rt_now = ev_time ();
1849
1850 /* loop a few times, before making important decisions.
1851 * on the choice of "4": one iteration isn't enough,
1852 * in case we get preempted during the calls to
1853 * ev_time and get_clock. a second call is almost guaranteed
1854 * to succeed in that case, though. and looping a few more times
1855 * doesn't hurt either as we only do this on time-jumps or
1856 * in the unlikely event of having been preempted here.
1857 */
1858 for (i = 4; --i; )
1859 {
1860 rtmn_diff = ev_rt_now - mn_now;
1861
1862 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1863 return; /* all is well */
1864
1865 ev_rt_now = ev_time ();
1866 mn_now = get_clock ();
1867 now_floor = mn_now;
1868 }
1869
1870# if EV_PERIODIC_ENABLE
1871 periodics_reschedule (EV_A);
1872# endif
1873 /* no timer adjustment, as the monotonic clock doesn't jump */
1874 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1875 }
1876 else
1877#endif
1878 {
1879 ev_rt_now = ev_time ();
1880
1881 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1882 {
1883#if EV_PERIODIC_ENABLE
1884 periodics_reschedule (EV_A);
1885#endif
1886 /* adjust timers. this is easy, as the offset is the same for all of them */
1887 for (i = 0; i < timercnt; ++i)
744 { 1888 {
745 ev_periodic_stop (EV_A_ w); 1889 ANHE *he = timers + i + HEAP0;
746 ev_periodic_start (EV_A_ w); 1890 ANHE_w (*he)->at += ev_rt_now - mn_now;
747 1891 ANHE_at_cache (*he);
748 i = 0; /* restart loop, inefficient, but time jumps should be rare */
749 } 1892 }
750 } 1893 }
751 }
752}
753 1894
754inline int
755time_update_monotonic (EV_P)
756{
757 mn_now = get_clock ();
758
759 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
760 {
761 rt_now = rtmn_diff + mn_now;
762 return 0;
763 }
764 else
765 {
766 now_floor = mn_now;
767 rt_now = ev_time ();
768 return 1;
769 }
770}
771
772static void
773time_update (EV_P)
774{
775 int i;
776
777#if EV_USE_MONOTONIC
778 if (expect_true (have_monotonic))
779 {
780 if (time_update_monotonic (EV_A))
781 {
782 ev_tstamp odiff = rtmn_diff;
783
784 for (i = 4; --i; ) /* loop a few times, before making important decisions */
785 {
786 rtmn_diff = rt_now - mn_now;
787
788 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
789 return; /* all is well */
790
791 rt_now = ev_time ();
792 mn_now = get_clock ();
793 now_floor = mn_now;
794 }
795
796 periodics_reschedule (EV_A);
797 /* no timer adjustment, as the monotonic clock doesn't jump */
798 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
799 }
800 }
801 else
802#endif
803 {
804 rt_now = ev_time ();
805
806 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
807 {
808 periodics_reschedule (EV_A);
809
810 /* adjust timers. this is easy, as the offset is the same for all */
811 for (i = 0; i < timercnt; ++i)
812 timers [i]->at += rt_now - mn_now;
813 }
814
815 mn_now = rt_now; 1895 mn_now = ev_rt_now;
816 } 1896 }
817} 1897}
818 1898
819void 1899void
820ev_ref (EV_P) 1900ev_ref (EV_P)
… …
831static int loop_done; 1911static int loop_done;
832 1912
833void 1913void
834ev_loop (EV_P_ int flags) 1914ev_loop (EV_P_ int flags)
835{ 1915{
836 double block; 1916 loop_done = EVUNLOOP_CANCEL;
837 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1917
1918 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
838 1919
839 do 1920 do
840 { 1921 {
1922#if EV_VERIFY >= 2
1923 ev_loop_verify (EV_A);
1924#endif
1925
1926#ifndef _WIN32
1927 if (expect_false (curpid)) /* penalise the forking check even more */
1928 if (expect_false (getpid () != curpid))
1929 {
1930 curpid = getpid ();
1931 postfork = 1;
1932 }
1933#endif
1934
1935#if EV_FORK_ENABLE
1936 /* we might have forked, so queue fork handlers */
1937 if (expect_false (postfork))
1938 if (forkcnt)
1939 {
1940 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1941 call_pending (EV_A);
1942 }
1943#endif
1944
841 /* queue check watchers (and execute them) */ 1945 /* queue prepare watchers (and execute them) */
842 if (expect_false (preparecnt)) 1946 if (expect_false (preparecnt))
843 { 1947 {
844 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1948 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
845 call_pending (EV_A); 1949 call_pending (EV_A);
846 } 1950 }
847 1951
1952 if (expect_false (!activecnt))
1953 break;
1954
1955 /* we might have forked, so reify kernel state if necessary */
1956 if (expect_false (postfork))
1957 loop_fork (EV_A);
1958
848 /* update fd-related kernel structures */ 1959 /* update fd-related kernel structures */
849 fd_reify (EV_A); 1960 fd_reify (EV_A);
850 1961
851 /* calculate blocking time */ 1962 /* calculate blocking time */
1963 {
1964 ev_tstamp waittime = 0.;
1965 ev_tstamp sleeptime = 0.;
852 1966
853 /* we only need this for !monotonic clockor timers, but as we basically 1967 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
854 always have timers, we just calculate it always */
855#if EV_USE_MONOTONIC
856 if (expect_true (have_monotonic))
857 time_update_monotonic (EV_A);
858 else
859#endif
860 { 1968 {
861 rt_now = ev_time (); 1969 /* update time to cancel out callback processing overhead */
862 mn_now = rt_now; 1970 time_update (EV_A_ 1e100);
863 }
864 1971
865 if (flags & EVLOOP_NONBLOCK || idlecnt)
866 block = 0.;
867 else
868 {
869 block = MAX_BLOCKTIME; 1972 waittime = MAX_BLOCKTIME;
870 1973
871 if (timercnt) 1974 if (timercnt)
872 { 1975 {
873 ev_tstamp to = timers [0]->at - mn_now + method_fudge; 1976 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
874 if (block > to) block = to; 1977 if (waittime > to) waittime = to;
875 } 1978 }
876 1979
1980#if EV_PERIODIC_ENABLE
877 if (periodiccnt) 1981 if (periodiccnt)
878 { 1982 {
879 ev_tstamp to = periodics [0]->at - rt_now + method_fudge; 1983 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
880 if (block > to) block = to; 1984 if (waittime > to) waittime = to;
881 } 1985 }
1986#endif
882 1987
883 if (block < 0.) block = 0.; 1988 if (expect_false (waittime < timeout_blocktime))
1989 waittime = timeout_blocktime;
1990
1991 sleeptime = waittime - backend_fudge;
1992
1993 if (expect_true (sleeptime > io_blocktime))
1994 sleeptime = io_blocktime;
1995
1996 if (sleeptime)
1997 {
1998 ev_sleep (sleeptime);
1999 waittime -= sleeptime;
2000 }
884 } 2001 }
885 2002
886 method_poll (EV_A_ block); 2003 ++loop_count;
2004 backend_poll (EV_A_ waittime);
887 2005
888 /* update rt_now, do magic */ 2006 /* update ev_rt_now, do magic */
889 time_update (EV_A); 2007 time_update (EV_A_ waittime + sleeptime);
2008 }
890 2009
891 /* queue pending timers and reschedule them */ 2010 /* queue pending timers and reschedule them */
892 timers_reify (EV_A); /* relative timers called last */ 2011 timers_reify (EV_A); /* relative timers called last */
2012#if EV_PERIODIC_ENABLE
893 periodics_reify (EV_A); /* absolute timers called first */ 2013 periodics_reify (EV_A); /* absolute timers called first */
2014#endif
894 2015
2016#if EV_IDLE_ENABLE
895 /* queue idle watchers unless io or timers are pending */ 2017 /* queue idle watchers unless other events are pending */
896 if (!pendingcnt) 2018 idle_reify (EV_A);
897 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2019#endif
898 2020
899 /* queue check watchers, to be executed first */ 2021 /* queue check watchers, to be executed first */
900 if (checkcnt) 2022 if (expect_false (checkcnt))
901 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2023 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
902 2024
903 call_pending (EV_A); 2025 call_pending (EV_A);
904 } 2026 }
905 while (activecnt && !loop_done); 2027 while (expect_true (
2028 activecnt
2029 && !loop_done
2030 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2031 ));
906 2032
907 if (loop_done != 2) 2033 if (loop_done == EVUNLOOP_ONE)
908 loop_done = 0; 2034 loop_done = EVUNLOOP_CANCEL;
909} 2035}
910 2036
911void 2037void
912ev_unloop (EV_P_ int how) 2038ev_unloop (EV_P_ int how)
913{ 2039{
914 loop_done = how; 2040 loop_done = how;
915} 2041}
916 2042
917/*****************************************************************************/ 2043/*****************************************************************************/
918 2044
919inline void 2045void inline_size
920wlist_add (WL *head, WL elem) 2046wlist_add (WL *head, WL elem)
921{ 2047{
922 elem->next = *head; 2048 elem->next = *head;
923 *head = elem; 2049 *head = elem;
924} 2050}
925 2051
926inline void 2052void inline_size
927wlist_del (WL *head, WL elem) 2053wlist_del (WL *head, WL elem)
928{ 2054{
929 while (*head) 2055 while (*head)
930 { 2056 {
931 if (*head == elem) 2057 if (*head == elem)
… …
936 2062
937 head = &(*head)->next; 2063 head = &(*head)->next;
938 } 2064 }
939} 2065}
940 2066
941inline void 2067void inline_speed
942ev_clear_pending (EV_P_ W w) 2068clear_pending (EV_P_ W w)
943{ 2069{
944 if (w->pending) 2070 if (w->pending)
945 { 2071 {
946 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2072 pendings [ABSPRI (w)][w->pending - 1].w = 0;
947 w->pending = 0; 2073 w->pending = 0;
948 } 2074 }
949} 2075}
950 2076
951inline void 2077int
2078ev_clear_pending (EV_P_ void *w)
2079{
2080 W w_ = (W)w;
2081 int pending = w_->pending;
2082
2083 if (expect_true (pending))
2084 {
2085 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2086 w_->pending = 0;
2087 p->w = 0;
2088 return p->events;
2089 }
2090 else
2091 return 0;
2092}
2093
2094void inline_size
2095pri_adjust (EV_P_ W w)
2096{
2097 int pri = w->priority;
2098 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2099 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2100 w->priority = pri;
2101}
2102
2103void inline_speed
952ev_start (EV_P_ W w, int active) 2104ev_start (EV_P_ W w, int active)
953{ 2105{
954 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2106 pri_adjust (EV_A_ w);
955 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
956
957 w->active = active; 2107 w->active = active;
958 ev_ref (EV_A); 2108 ev_ref (EV_A);
959} 2109}
960 2110
961inline void 2111void inline_size
962ev_stop (EV_P_ W w) 2112ev_stop (EV_P_ W w)
963{ 2113{
964 ev_unref (EV_A); 2114 ev_unref (EV_A);
965 w->active = 0; 2115 w->active = 0;
966} 2116}
967 2117
968/*****************************************************************************/ 2118/*****************************************************************************/
969 2119
970void 2120void noinline
971ev_io_start (EV_P_ struct ev_io *w) 2121ev_io_start (EV_P_ ev_io *w)
972{ 2122{
973 int fd = w->fd; 2123 int fd = w->fd;
974 2124
975 if (ev_is_active (w)) 2125 if (expect_false (ev_is_active (w)))
976 return; 2126 return;
977 2127
978 assert (("ev_io_start called with negative fd", fd >= 0)); 2128 assert (("ev_io_start called with negative fd", fd >= 0));
979 2129
2130 EV_FREQUENT_CHECK;
2131
980 ev_start (EV_A_ (W)w, 1); 2132 ev_start (EV_A_ (W)w, 1);
981 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2133 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
982 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2134 wlist_add (&anfds[fd].head, (WL)w);
983 2135
984 fd_change (EV_A_ fd); 2136 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
985} 2137 w->events &= ~EV_IOFDSET;
986 2138
987void 2139 EV_FREQUENT_CHECK;
2140}
2141
2142void noinline
988ev_io_stop (EV_P_ struct ev_io *w) 2143ev_io_stop (EV_P_ ev_io *w)
989{ 2144{
990 ev_clear_pending (EV_A_ (W)w); 2145 clear_pending (EV_A_ (W)w);
991 if (!ev_is_active (w)) 2146 if (expect_false (!ev_is_active (w)))
992 return; 2147 return;
993 2148
2149 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2150
2151 EV_FREQUENT_CHECK;
2152
994 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2153 wlist_del (&anfds[w->fd].head, (WL)w);
995 ev_stop (EV_A_ (W)w); 2154 ev_stop (EV_A_ (W)w);
996 2155
997 fd_change (EV_A_ w->fd); 2156 fd_change (EV_A_ w->fd, 1);
998}
999 2157
1000void 2158 EV_FREQUENT_CHECK;
2159}
2160
2161void noinline
1001ev_timer_start (EV_P_ struct ev_timer *w) 2162ev_timer_start (EV_P_ ev_timer *w)
1002{ 2163{
1003 if (ev_is_active (w)) 2164 if (expect_false (ev_is_active (w)))
1004 return; 2165 return;
1005 2166
1006 w->at += mn_now; 2167 ev_at (w) += mn_now;
1007 2168
1008 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2169 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1009 2170
2171 EV_FREQUENT_CHECK;
2172
2173 ++timercnt;
1010 ev_start (EV_A_ (W)w, ++timercnt); 2174 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1011 array_needsize (timers, timermax, timercnt, ); 2175 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1012 timers [timercnt - 1] = w; 2176 ANHE_w (timers [ev_active (w)]) = (WT)w;
1013 upheap ((WT *)timers, timercnt - 1); 2177 ANHE_at_cache (timers [ev_active (w)]);
1014} 2178 upheap (timers, ev_active (w));
1015 2179
1016void 2180 EV_FREQUENT_CHECK;
2181
2182 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2183}
2184
2185void noinline
1017ev_timer_stop (EV_P_ struct ev_timer *w) 2186ev_timer_stop (EV_P_ ev_timer *w)
1018{ 2187{
1019 ev_clear_pending (EV_A_ (W)w); 2188 clear_pending (EV_A_ (W)w);
1020 if (!ev_is_active (w)) 2189 if (expect_false (!ev_is_active (w)))
1021 return; 2190 return;
1022 2191
1023 if (w->active < timercnt--) 2192 EV_FREQUENT_CHECK;
2193
2194 {
2195 int active = ev_active (w);
2196
2197 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2198
2199 --timercnt;
2200
2201 if (expect_true (active < timercnt + HEAP0))
1024 { 2202 {
1025 timers [w->active - 1] = timers [timercnt]; 2203 timers [active] = timers [timercnt + HEAP0];
1026 downheap ((WT *)timers, timercnt, w->active - 1); 2204 adjustheap (timers, timercnt, active);
1027 } 2205 }
2206 }
1028 2207
1029 w->at = w->repeat; 2208 EV_FREQUENT_CHECK;
2209
2210 ev_at (w) -= mn_now;
1030 2211
1031 ev_stop (EV_A_ (W)w); 2212 ev_stop (EV_A_ (W)w);
1032} 2213}
1033 2214
1034void 2215void noinline
1035ev_timer_again (EV_P_ struct ev_timer *w) 2216ev_timer_again (EV_P_ ev_timer *w)
1036{ 2217{
2218 EV_FREQUENT_CHECK;
2219
1037 if (ev_is_active (w)) 2220 if (ev_is_active (w))
1038 { 2221 {
1039 if (w->repeat) 2222 if (w->repeat)
1040 { 2223 {
1041 w->at = mn_now + w->repeat; 2224 ev_at (w) = mn_now + w->repeat;
2225 ANHE_at_cache (timers [ev_active (w)]);
1042 downheap ((WT *)timers, timercnt, w->active - 1); 2226 adjustheap (timers, timercnt, ev_active (w));
1043 } 2227 }
1044 else 2228 else
1045 ev_timer_stop (EV_A_ w); 2229 ev_timer_stop (EV_A_ w);
1046 } 2230 }
1047 else if (w->repeat) 2231 else if (w->repeat)
2232 {
2233 ev_at (w) = w->repeat;
1048 ev_timer_start (EV_A_ w); 2234 ev_timer_start (EV_A_ w);
1049} 2235 }
1050 2236
1051void 2237 EV_FREQUENT_CHECK;
2238}
2239
2240#if EV_PERIODIC_ENABLE
2241void noinline
1052ev_periodic_start (EV_P_ struct ev_periodic *w) 2242ev_periodic_start (EV_P_ ev_periodic *w)
1053{ 2243{
1054 if (ev_is_active (w)) 2244 if (expect_false (ev_is_active (w)))
1055 return; 2245 return;
1056 2246
2247 if (w->reschedule_cb)
2248 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2249 else if (w->interval)
2250 {
1057 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2251 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1058
1059 /* this formula differs from the one in periodic_reify because we do not always round up */ 2252 /* this formula differs from the one in periodic_reify because we do not always round up */
1060 if (w->interval)
1061 w->at += ceil ((rt_now - w->at) / w->interval) * w->interval; 2253 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2254 }
2255 else
2256 ev_at (w) = w->offset;
1062 2257
2258 EV_FREQUENT_CHECK;
2259
2260 ++periodiccnt;
1063 ev_start (EV_A_ (W)w, ++periodiccnt); 2261 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1064 array_needsize (periodics, periodicmax, periodiccnt, ); 2262 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1065 periodics [periodiccnt - 1] = w; 2263 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1066 upheap ((WT *)periodics, periodiccnt - 1); 2264 ANHE_at_cache (periodics [ev_active (w)]);
1067} 2265 upheap (periodics, ev_active (w));
1068 2266
1069void 2267 EV_FREQUENT_CHECK;
2268
2269 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2270}
2271
2272void noinline
1070ev_periodic_stop (EV_P_ struct ev_periodic *w) 2273ev_periodic_stop (EV_P_ ev_periodic *w)
1071{ 2274{
1072 ev_clear_pending (EV_A_ (W)w); 2275 clear_pending (EV_A_ (W)w);
1073 if (!ev_is_active (w)) 2276 if (expect_false (!ev_is_active (w)))
1074 return; 2277 return;
1075 2278
1076 if (w->active < periodiccnt--) 2279 EV_FREQUENT_CHECK;
2280
2281 {
2282 int active = ev_active (w);
2283
2284 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2285
2286 --periodiccnt;
2287
2288 if (expect_true (active < periodiccnt + HEAP0))
1077 { 2289 {
1078 periodics [w->active - 1] = periodics [periodiccnt]; 2290 periodics [active] = periodics [periodiccnt + HEAP0];
1079 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2291 adjustheap (periodics, periodiccnt, active);
1080 } 2292 }
2293 }
2294
2295 EV_FREQUENT_CHECK;
1081 2296
1082 ev_stop (EV_A_ (W)w); 2297 ev_stop (EV_A_ (W)w);
1083} 2298}
2299
2300void noinline
2301ev_periodic_again (EV_P_ ev_periodic *w)
2302{
2303 /* TODO: use adjustheap and recalculation */
2304 ev_periodic_stop (EV_A_ w);
2305 ev_periodic_start (EV_A_ w);
2306}
2307#endif
1084 2308
1085#ifndef SA_RESTART 2309#ifndef SA_RESTART
1086# define SA_RESTART 0 2310# define SA_RESTART 0
1087#endif 2311#endif
1088 2312
1089void 2313void noinline
1090ev_signal_start (EV_P_ struct ev_signal *w) 2314ev_signal_start (EV_P_ ev_signal *w)
1091{ 2315{
2316#if EV_MULTIPLICITY
2317 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2318#endif
1092 if (ev_is_active (w)) 2319 if (expect_false (ev_is_active (w)))
1093 return; 2320 return;
1094 2321
1095 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2322 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1096 2323
2324 evpipe_init (EV_A);
2325
2326 EV_FREQUENT_CHECK;
2327
2328 {
2329#ifndef _WIN32
2330 sigset_t full, prev;
2331 sigfillset (&full);
2332 sigprocmask (SIG_SETMASK, &full, &prev);
2333#endif
2334
2335 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2336
2337#ifndef _WIN32
2338 sigprocmask (SIG_SETMASK, &prev, 0);
2339#endif
2340 }
2341
1097 ev_start (EV_A_ (W)w, 1); 2342 ev_start (EV_A_ (W)w, 1);
1098 array_needsize (signals, signalmax, w->signum, signals_init);
1099 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2343 wlist_add (&signals [w->signum - 1].head, (WL)w);
1100 2344
1101 if (!w->next) 2345 if (!((WL)w)->next)
1102 { 2346 {
2347#if _WIN32
2348 signal (w->signum, ev_sighandler);
2349#else
1103 struct sigaction sa; 2350 struct sigaction sa;
1104 sa.sa_handler = sighandler; 2351 sa.sa_handler = ev_sighandler;
1105 sigfillset (&sa.sa_mask); 2352 sigfillset (&sa.sa_mask);
1106 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2353 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1107 sigaction (w->signum, &sa, 0); 2354 sigaction (w->signum, &sa, 0);
2355#endif
1108 } 2356 }
1109}
1110 2357
1111void 2358 EV_FREQUENT_CHECK;
2359}
2360
2361void noinline
1112ev_signal_stop (EV_P_ struct ev_signal *w) 2362ev_signal_stop (EV_P_ ev_signal *w)
1113{ 2363{
1114 ev_clear_pending (EV_A_ (W)w); 2364 clear_pending (EV_A_ (W)w);
1115 if (!ev_is_active (w)) 2365 if (expect_false (!ev_is_active (w)))
1116 return; 2366 return;
1117 2367
2368 EV_FREQUENT_CHECK;
2369
1118 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2370 wlist_del (&signals [w->signum - 1].head, (WL)w);
1119 ev_stop (EV_A_ (W)w); 2371 ev_stop (EV_A_ (W)w);
1120 2372
1121 if (!signals [w->signum - 1].head) 2373 if (!signals [w->signum - 1].head)
1122 signal (w->signum, SIG_DFL); 2374 signal (w->signum, SIG_DFL);
1123}
1124 2375
2376 EV_FREQUENT_CHECK;
2377}
2378
1125void 2379void
1126ev_idle_start (EV_P_ struct ev_idle *w) 2380ev_child_start (EV_P_ ev_child *w)
1127{ 2381{
2382#if EV_MULTIPLICITY
2383 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2384#endif
1128 if (ev_is_active (w)) 2385 if (expect_false (ev_is_active (w)))
1129 return; 2386 return;
1130 2387
2388 EV_FREQUENT_CHECK;
2389
1131 ev_start (EV_A_ (W)w, ++idlecnt); 2390 ev_start (EV_A_ (W)w, 1);
1132 array_needsize (idles, idlemax, idlecnt, ); 2391 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1133 idles [idlecnt - 1] = w;
1134}
1135 2392
2393 EV_FREQUENT_CHECK;
2394}
2395
1136void 2396void
1137ev_idle_stop (EV_P_ struct ev_idle *w) 2397ev_child_stop (EV_P_ ev_child *w)
1138{ 2398{
1139 ev_clear_pending (EV_A_ (W)w); 2399 clear_pending (EV_A_ (W)w);
1140 if (ev_is_active (w)) 2400 if (expect_false (!ev_is_active (w)))
1141 return; 2401 return;
1142 2402
1143 idles [w->active - 1] = idles [--idlecnt]; 2403 EV_FREQUENT_CHECK;
2404
2405 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1144 ev_stop (EV_A_ (W)w); 2406 ev_stop (EV_A_ (W)w);
1145}
1146 2407
1147void 2408 EV_FREQUENT_CHECK;
1148ev_prepare_start (EV_P_ struct ev_prepare *w) 2409}
2410
2411#if EV_STAT_ENABLE
2412
2413# ifdef _WIN32
2414# undef lstat
2415# define lstat(a,b) _stati64 (a,b)
2416# endif
2417
2418#define DEF_STAT_INTERVAL 5.0074891
2419#define MIN_STAT_INTERVAL 0.1074891
2420
2421static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2422
2423#if EV_USE_INOTIFY
2424# define EV_INOTIFY_BUFSIZE 8192
2425
2426static void noinline
2427infy_add (EV_P_ ev_stat *w)
1149{ 2428{
1150 if (ev_is_active (w)) 2429 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);
2430
2431 if (w->wd < 0)
2432 {
2433 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2434
2435 /* monitor some parent directory for speedup hints */
2436 /* note that exceeding the hardcoded limit is not a correctness issue, */
2437 /* but an efficiency issue only */
2438 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2439 {
2440 char path [4096];
2441 strcpy (path, w->path);
2442
2443 do
2444 {
2445 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2446 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2447
2448 char *pend = strrchr (path, '/');
2449
2450 if (!pend)
2451 break; /* whoops, no '/', complain to your admin */
2452
2453 *pend = 0;
2454 w->wd = inotify_add_watch (fs_fd, path, mask);
2455 }
2456 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2457 }
2458 }
2459 else
2460 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2461
2462 if (w->wd >= 0)
2463 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2464}
2465
2466static void noinline
2467infy_del (EV_P_ ev_stat *w)
2468{
2469 int slot;
2470 int wd = w->wd;
2471
2472 if (wd < 0)
1151 return; 2473 return;
1152 2474
2475 w->wd = -2;
2476 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2477 wlist_del (&fs_hash [slot].head, (WL)w);
2478
2479 /* remove this watcher, if others are watching it, they will rearm */
2480 inotify_rm_watch (fs_fd, wd);
2481}
2482
2483static void noinline
2484infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2485{
2486 if (slot < 0)
2487 /* overflow, need to check for all hahs slots */
2488 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2489 infy_wd (EV_A_ slot, wd, ev);
2490 else
2491 {
2492 WL w_;
2493
2494 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2495 {
2496 ev_stat *w = (ev_stat *)w_;
2497 w_ = w_->next; /* lets us remove this watcher and all before it */
2498
2499 if (w->wd == wd || wd == -1)
2500 {
2501 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2502 {
2503 w->wd = -1;
2504 infy_add (EV_A_ w); /* re-add, no matter what */
2505 }
2506
2507 stat_timer_cb (EV_A_ &w->timer, 0);
2508 }
2509 }
2510 }
2511}
2512
2513static void
2514infy_cb (EV_P_ ev_io *w, int revents)
2515{
2516 char buf [EV_INOTIFY_BUFSIZE];
2517 struct inotify_event *ev = (struct inotify_event *)buf;
2518 int ofs;
2519 int len = read (fs_fd, buf, sizeof (buf));
2520
2521 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2522 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2523}
2524
2525void inline_size
2526infy_init (EV_P)
2527{
2528 if (fs_fd != -2)
2529 return;
2530
2531 fs_fd = inotify_init ();
2532
2533 if (fs_fd >= 0)
2534 {
2535 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2536 ev_set_priority (&fs_w, EV_MAXPRI);
2537 ev_io_start (EV_A_ &fs_w);
2538 }
2539}
2540
2541void inline_size
2542infy_fork (EV_P)
2543{
2544 int slot;
2545
2546 if (fs_fd < 0)
2547 return;
2548
2549 close (fs_fd);
2550 fs_fd = inotify_init ();
2551
2552 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2553 {
2554 WL w_ = fs_hash [slot].head;
2555 fs_hash [slot].head = 0;
2556
2557 while (w_)
2558 {
2559 ev_stat *w = (ev_stat *)w_;
2560 w_ = w_->next; /* lets us add this watcher */
2561
2562 w->wd = -1;
2563
2564 if (fs_fd >= 0)
2565 infy_add (EV_A_ w); /* re-add, no matter what */
2566 else
2567 ev_timer_start (EV_A_ &w->timer);
2568 }
2569
2570 }
2571}
2572
2573#endif
2574
2575#ifdef _WIN32
2576# define EV_LSTAT(p,b) _stati64 (p, b)
2577#else
2578# define EV_LSTAT(p,b) lstat (p, b)
2579#endif
2580
2581void
2582ev_stat_stat (EV_P_ ev_stat *w)
2583{
2584 if (lstat (w->path, &w->attr) < 0)
2585 w->attr.st_nlink = 0;
2586 else if (!w->attr.st_nlink)
2587 w->attr.st_nlink = 1;
2588}
2589
2590static void noinline
2591stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2592{
2593 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2594
2595 /* we copy this here each the time so that */
2596 /* prev has the old value when the callback gets invoked */
2597 w->prev = w->attr;
2598 ev_stat_stat (EV_A_ w);
2599
2600 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2601 if (
2602 w->prev.st_dev != w->attr.st_dev
2603 || w->prev.st_ino != w->attr.st_ino
2604 || w->prev.st_mode != w->attr.st_mode
2605 || w->prev.st_nlink != w->attr.st_nlink
2606 || w->prev.st_uid != w->attr.st_uid
2607 || w->prev.st_gid != w->attr.st_gid
2608 || w->prev.st_rdev != w->attr.st_rdev
2609 || w->prev.st_size != w->attr.st_size
2610 || w->prev.st_atime != w->attr.st_atime
2611 || w->prev.st_mtime != w->attr.st_mtime
2612 || w->prev.st_ctime != w->attr.st_ctime
2613 ) {
2614 #if EV_USE_INOTIFY
2615 infy_del (EV_A_ w);
2616 infy_add (EV_A_ w);
2617 ev_stat_stat (EV_A_ w); /* avoid race... */
2618 #endif
2619
2620 ev_feed_event (EV_A_ w, EV_STAT);
2621 }
2622}
2623
2624void
2625ev_stat_start (EV_P_ ev_stat *w)
2626{
2627 if (expect_false (ev_is_active (w)))
2628 return;
2629
2630 /* since we use memcmp, we need to clear any padding data etc. */
2631 memset (&w->prev, 0, sizeof (ev_statdata));
2632 memset (&w->attr, 0, sizeof (ev_statdata));
2633
2634 ev_stat_stat (EV_A_ w);
2635
2636 if (w->interval < MIN_STAT_INTERVAL)
2637 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2638
2639 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2640 ev_set_priority (&w->timer, ev_priority (w));
2641
2642#if EV_USE_INOTIFY
2643 infy_init (EV_A);
2644
2645 if (fs_fd >= 0)
2646 infy_add (EV_A_ w);
2647 else
2648#endif
2649 ev_timer_start (EV_A_ &w->timer);
2650
2651 ev_start (EV_A_ (W)w, 1);
2652
2653 EV_FREQUENT_CHECK;
2654}
2655
2656void
2657ev_stat_stop (EV_P_ ev_stat *w)
2658{
2659 clear_pending (EV_A_ (W)w);
2660 if (expect_false (!ev_is_active (w)))
2661 return;
2662
2663 EV_FREQUENT_CHECK;
2664
2665#if EV_USE_INOTIFY
2666 infy_del (EV_A_ w);
2667#endif
2668 ev_timer_stop (EV_A_ &w->timer);
2669
2670 ev_stop (EV_A_ (W)w);
2671
2672 EV_FREQUENT_CHECK;
2673}
2674#endif
2675
2676#if EV_IDLE_ENABLE
2677void
2678ev_idle_start (EV_P_ ev_idle *w)
2679{
2680 if (expect_false (ev_is_active (w)))
2681 return;
2682
2683 pri_adjust (EV_A_ (W)w);
2684
2685 EV_FREQUENT_CHECK;
2686
2687 {
2688 int active = ++idlecnt [ABSPRI (w)];
2689
2690 ++idleall;
2691 ev_start (EV_A_ (W)w, active);
2692
2693 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2694 idles [ABSPRI (w)][active - 1] = w;
2695 }
2696
2697 EV_FREQUENT_CHECK;
2698}
2699
2700void
2701ev_idle_stop (EV_P_ ev_idle *w)
2702{
2703 clear_pending (EV_A_ (W)w);
2704 if (expect_false (!ev_is_active (w)))
2705 return;
2706
2707 EV_FREQUENT_CHECK;
2708
2709 {
2710 int active = ev_active (w);
2711
2712 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2713 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2714
2715 ev_stop (EV_A_ (W)w);
2716 --idleall;
2717 }
2718
2719 EV_FREQUENT_CHECK;
2720}
2721#endif
2722
2723void
2724ev_prepare_start (EV_P_ ev_prepare *w)
2725{
2726 if (expect_false (ev_is_active (w)))
2727 return;
2728
2729 EV_FREQUENT_CHECK;
2730
1153 ev_start (EV_A_ (W)w, ++preparecnt); 2731 ev_start (EV_A_ (W)w, ++preparecnt);
1154 array_needsize (prepares, preparemax, preparecnt, ); 2732 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1155 prepares [preparecnt - 1] = w; 2733 prepares [preparecnt - 1] = w;
1156}
1157 2734
2735 EV_FREQUENT_CHECK;
2736}
2737
1158void 2738void
1159ev_prepare_stop (EV_P_ struct ev_prepare *w) 2739ev_prepare_stop (EV_P_ ev_prepare *w)
1160{ 2740{
1161 ev_clear_pending (EV_A_ (W)w); 2741 clear_pending (EV_A_ (W)w);
1162 if (ev_is_active (w)) 2742 if (expect_false (!ev_is_active (w)))
1163 return; 2743 return;
1164 2744
2745 EV_FREQUENT_CHECK;
2746
2747 {
2748 int active = ev_active (w);
2749
1165 prepares [w->active - 1] = prepares [--preparecnt]; 2750 prepares [active - 1] = prepares [--preparecnt];
2751 ev_active (prepares [active - 1]) = active;
2752 }
2753
1166 ev_stop (EV_A_ (W)w); 2754 ev_stop (EV_A_ (W)w);
1167}
1168 2755
2756 EV_FREQUENT_CHECK;
2757}
2758
1169void 2759void
1170ev_check_start (EV_P_ struct ev_check *w) 2760ev_check_start (EV_P_ ev_check *w)
1171{ 2761{
1172 if (ev_is_active (w)) 2762 if (expect_false (ev_is_active (w)))
1173 return; 2763 return;
1174 2764
2765 EV_FREQUENT_CHECK;
2766
1175 ev_start (EV_A_ (W)w, ++checkcnt); 2767 ev_start (EV_A_ (W)w, ++checkcnt);
1176 array_needsize (checks, checkmax, checkcnt, ); 2768 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1177 checks [checkcnt - 1] = w; 2769 checks [checkcnt - 1] = w;
1178}
1179 2770
2771 EV_FREQUENT_CHECK;
2772}
2773
1180void 2774void
1181ev_check_stop (EV_P_ struct ev_check *w) 2775ev_check_stop (EV_P_ ev_check *w)
1182{ 2776{
1183 ev_clear_pending (EV_A_ (W)w); 2777 clear_pending (EV_A_ (W)w);
1184 if (ev_is_active (w)) 2778 if (expect_false (!ev_is_active (w)))
1185 return; 2779 return;
1186 2780
2781 EV_FREQUENT_CHECK;
2782
2783 {
2784 int active = ev_active (w);
2785
1187 checks [w->active - 1] = checks [--checkcnt]; 2786 checks [active - 1] = checks [--checkcnt];
2787 ev_active (checks [active - 1]) = active;
2788 }
2789
1188 ev_stop (EV_A_ (W)w); 2790 ev_stop (EV_A_ (W)w);
1189}
1190 2791
1191void 2792 EV_FREQUENT_CHECK;
1192ev_child_start (EV_P_ struct ev_child *w) 2793}
2794
2795#if EV_EMBED_ENABLE
2796void noinline
2797ev_embed_sweep (EV_P_ ev_embed *w)
1193{ 2798{
2799 ev_loop (w->other, EVLOOP_NONBLOCK);
2800}
2801
2802static void
2803embed_io_cb (EV_P_ ev_io *io, int revents)
2804{
2805 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2806
1194 if (ev_is_active (w)) 2807 if (ev_cb (w))
2808 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2809 else
2810 ev_loop (w->other, EVLOOP_NONBLOCK);
2811}
2812
2813static void
2814embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2815{
2816 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2817
2818 {
2819 struct ev_loop *loop = w->other;
2820
2821 while (fdchangecnt)
2822 {
2823 fd_reify (EV_A);
2824 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2825 }
2826 }
2827}
2828
2829#if 0
2830static void
2831embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2832{
2833 ev_idle_stop (EV_A_ idle);
2834}
2835#endif
2836
2837void
2838ev_embed_start (EV_P_ ev_embed *w)
2839{
2840 if (expect_false (ev_is_active (w)))
1195 return; 2841 return;
1196 2842
2843 {
2844 struct ev_loop *loop = w->other;
2845 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2846 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2847 }
2848
2849 EV_FREQUENT_CHECK;
2850
2851 ev_set_priority (&w->io, ev_priority (w));
2852 ev_io_start (EV_A_ &w->io);
2853
2854 ev_prepare_init (&w->prepare, embed_prepare_cb);
2855 ev_set_priority (&w->prepare, EV_MINPRI);
2856 ev_prepare_start (EV_A_ &w->prepare);
2857
2858 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2859
1197 ev_start (EV_A_ (W)w, 1); 2860 ev_start (EV_A_ (W)w, 1);
1198 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1199}
1200 2861
2862 EV_FREQUENT_CHECK;
2863}
2864
1201void 2865void
1202ev_child_stop (EV_P_ struct ev_child *w) 2866ev_embed_stop (EV_P_ ev_embed *w)
1203{ 2867{
1204 ev_clear_pending (EV_A_ (W)w); 2868 clear_pending (EV_A_ (W)w);
1205 if (ev_is_active (w)) 2869 if (expect_false (!ev_is_active (w)))
1206 return; 2870 return;
1207 2871
1208 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2872 EV_FREQUENT_CHECK;
2873
2874 ev_io_stop (EV_A_ &w->io);
2875 ev_prepare_stop (EV_A_ &w->prepare);
2876
1209 ev_stop (EV_A_ (W)w); 2877 ev_stop (EV_A_ (W)w);
2878
2879 EV_FREQUENT_CHECK;
1210} 2880}
2881#endif
2882
2883#if EV_FORK_ENABLE
2884void
2885ev_fork_start (EV_P_ ev_fork *w)
2886{
2887 if (expect_false (ev_is_active (w)))
2888 return;
2889
2890 EV_FREQUENT_CHECK;
2891
2892 ev_start (EV_A_ (W)w, ++forkcnt);
2893 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2894 forks [forkcnt - 1] = w;
2895
2896 EV_FREQUENT_CHECK;
2897}
2898
2899void
2900ev_fork_stop (EV_P_ ev_fork *w)
2901{
2902 clear_pending (EV_A_ (W)w);
2903 if (expect_false (!ev_is_active (w)))
2904 return;
2905
2906 EV_FREQUENT_CHECK;
2907
2908 {
2909 int active = ev_active (w);
2910
2911 forks [active - 1] = forks [--forkcnt];
2912 ev_active (forks [active - 1]) = active;
2913 }
2914
2915 ev_stop (EV_A_ (W)w);
2916
2917 EV_FREQUENT_CHECK;
2918}
2919#endif
2920
2921#if EV_ASYNC_ENABLE
2922void
2923ev_async_start (EV_P_ ev_async *w)
2924{
2925 if (expect_false (ev_is_active (w)))
2926 return;
2927
2928 evpipe_init (EV_A);
2929
2930 EV_FREQUENT_CHECK;
2931
2932 ev_start (EV_A_ (W)w, ++asynccnt);
2933 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2934 asyncs [asynccnt - 1] = w;
2935
2936 EV_FREQUENT_CHECK;
2937}
2938
2939void
2940ev_async_stop (EV_P_ ev_async *w)
2941{
2942 clear_pending (EV_A_ (W)w);
2943 if (expect_false (!ev_is_active (w)))
2944 return;
2945
2946 EV_FREQUENT_CHECK;
2947
2948 {
2949 int active = ev_active (w);
2950
2951 asyncs [active - 1] = asyncs [--asynccnt];
2952 ev_active (asyncs [active - 1]) = active;
2953 }
2954
2955 ev_stop (EV_A_ (W)w);
2956
2957 EV_FREQUENT_CHECK;
2958}
2959
2960void
2961ev_async_send (EV_P_ ev_async *w)
2962{
2963 w->sent = 1;
2964 evpipe_write (EV_A_ &gotasync);
2965}
2966#endif
1211 2967
1212/*****************************************************************************/ 2968/*****************************************************************************/
1213 2969
1214struct ev_once 2970struct ev_once
1215{ 2971{
1216 struct ev_io io; 2972 ev_io io;
1217 struct ev_timer to; 2973 ev_timer to;
1218 void (*cb)(int revents, void *arg); 2974 void (*cb)(int revents, void *arg);
1219 void *arg; 2975 void *arg;
1220}; 2976};
1221 2977
1222static void 2978static void
… …
1225 void (*cb)(int revents, void *arg) = once->cb; 2981 void (*cb)(int revents, void *arg) = once->cb;
1226 void *arg = once->arg; 2982 void *arg = once->arg;
1227 2983
1228 ev_io_stop (EV_A_ &once->io); 2984 ev_io_stop (EV_A_ &once->io);
1229 ev_timer_stop (EV_A_ &once->to); 2985 ev_timer_stop (EV_A_ &once->to);
1230 free (once); 2986 ev_free (once);
1231 2987
1232 cb (revents, arg); 2988 cb (revents, arg);
1233} 2989}
1234 2990
1235static void 2991static void
1236once_cb_io (EV_P_ struct ev_io *w, int revents) 2992once_cb_io (EV_P_ ev_io *w, int revents)
1237{ 2993{
1238 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2994 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1239} 2995}
1240 2996
1241static void 2997static void
1242once_cb_to (EV_P_ struct ev_timer *w, int revents) 2998once_cb_to (EV_P_ ev_timer *w, int revents)
1243{ 2999{
1244 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3000 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1245} 3001}
1246 3002
1247void 3003void
1248ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3004ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1249{ 3005{
1250 struct ev_once *once = malloc (sizeof (struct ev_once)); 3006 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1251 3007
1252 if (!once) 3008 if (expect_false (!once))
3009 {
1253 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3010 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1254 else 3011 return;
1255 { 3012 }
3013
1256 once->cb = cb; 3014 once->cb = cb;
1257 once->arg = arg; 3015 once->arg = arg;
1258 3016
1259 ev_watcher_init (&once->io, once_cb_io); 3017 ev_init (&once->io, once_cb_io);
1260 if (fd >= 0) 3018 if (fd >= 0)
1261 { 3019 {
1262 ev_io_set (&once->io, fd, events); 3020 ev_io_set (&once->io, fd, events);
1263 ev_io_start (EV_A_ &once->io); 3021 ev_io_start (EV_A_ &once->io);
1264 } 3022 }
1265 3023
1266 ev_watcher_init (&once->to, once_cb_to); 3024 ev_init (&once->to, once_cb_to);
1267 if (timeout >= 0.) 3025 if (timeout >= 0.)
1268 { 3026 {
1269 ev_timer_set (&once->to, timeout, 0.); 3027 ev_timer_set (&once->to, timeout, 0.);
1270 ev_timer_start (EV_A_ &once->to); 3028 ev_timer_start (EV_A_ &once->to);
1271 }
1272 }
1273}
1274
1275/*****************************************************************************/
1276
1277#if 0
1278
1279struct ev_io wio;
1280
1281static void
1282sin_cb (struct ev_io *w, int revents)
1283{
1284 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1285}
1286
1287static void
1288ocb (struct ev_timer *w, int revents)
1289{
1290 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1291 ev_timer_stop (w);
1292 ev_timer_start (w);
1293}
1294
1295static void
1296scb (struct ev_signal *w, int revents)
1297{
1298 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1299 ev_io_stop (&wio);
1300 ev_io_start (&wio);
1301}
1302
1303static void
1304gcb (struct ev_signal *w, int revents)
1305{
1306 fprintf (stderr, "generic %x\n", revents);
1307
1308}
1309
1310int main (void)
1311{
1312 ev_init (0);
1313
1314 ev_io_init (&wio, sin_cb, 0, EV_READ);
1315 ev_io_start (&wio);
1316
1317 struct ev_timer t[10000];
1318
1319#if 0
1320 int i;
1321 for (i = 0; i < 10000; ++i)
1322 { 3029 }
1323 struct ev_timer *w = t + i;
1324 ev_watcher_init (w, ocb, i);
1325 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1326 ev_timer_start (w);
1327 if (drand48 () < 0.5)
1328 ev_timer_stop (w);
1329 }
1330#endif
1331
1332 struct ev_timer t1;
1333 ev_timer_init (&t1, ocb, 5, 10);
1334 ev_timer_start (&t1);
1335
1336 struct ev_signal sig;
1337 ev_signal_init (&sig, scb, SIGQUIT);
1338 ev_signal_start (&sig);
1339
1340 struct ev_check cw;
1341 ev_check_init (&cw, gcb);
1342 ev_check_start (&cw);
1343
1344 struct ev_idle iw;
1345 ev_idle_init (&iw, gcb);
1346 ev_idle_start (&iw);
1347
1348 ev_loop (0);
1349
1350 return 0;
1351} 3030}
1352 3031
3032#if EV_MULTIPLICITY
3033 #include "ev_wrap.h"
1353#endif 3034#endif
1354 3035
3036#ifdef __cplusplus
3037}
3038#endif
1355 3039
1356
1357

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