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Comparing libev/ev.c (file contents):
Revision 1.61 by root, Sun Nov 4 19:45:09 2007 UTC vs.
Revision 1.267 by root, Mon Oct 27 11:08:29 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
33 51
34# if HAVE_CLOCK_GETTIME 52# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC
35# define EV_USE_MONOTONIC 1 54# define EV_USE_MONOTONIC 1
55# endif
56# ifndef EV_USE_REALTIME
36# define EV_USE_REALTIME 1 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
37# endif 66# endif
38 67
39# if HAVE_SELECT && HAVE_SYS_SELECT_H 68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
40# define EV_USE_SELECT 1 70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
73# endif
41# endif 74# endif
42 75
43# if HAVE_POLL && HAVE_POLL_H 76# ifndef EV_USE_SELECT
77# if HAVE_SELECT && HAVE_SYS_SELECT_H
44# define EV_USE_POLL 1 78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif
45# endif 82# endif
46 83
47# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
48# define EV_USE_EPOLL 1 86# define EV_USE_POLL 1
87# else
88# define EV_USE_POLL 0
89# endif
49# endif 90# endif
50 91
51# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
52# define EV_USE_KQUEUE 1 94# define EV_USE_EPOLL 1
95# else
96# define EV_USE_EPOLL 0
97# endif
53# 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
54 115
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
55#endif 132#endif
56 133
57#include <math.h> 134#include <math.h>
58#include <stdlib.h> 135#include <stdlib.h>
59#include <unistd.h>
60#include <fcntl.h> 136#include <fcntl.h>
61#include <signal.h>
62#include <stddef.h> 137#include <stddef.h>
63 138
64#include <stdio.h> 139#include <stdio.h>
65 140
66#include <assert.h> 141#include <assert.h>
67#include <errno.h> 142#include <errno.h>
68#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
69#ifndef WIN32 154#ifndef _WIN32
155# include <sys/time.h>
70# 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
71#endif 164# endif
72#include <sys/time.h> 165#endif
73#include <time.h>
74 166
75/**/ 167/* this block tries to deduce configuration from header-defined symbols and defaults */
76 168
77#ifndef EV_USE_MONOTONIC 169#ifndef EV_USE_MONOTONIC
170# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
78# 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
79#endif 187#endif
80 188
81#ifndef EV_USE_SELECT 189#ifndef EV_USE_SELECT
82# define EV_USE_SELECT 1 190# define EV_USE_SELECT 1
83#endif 191#endif
84 192
85#ifndef EV_USE_POLL 193#ifndef EV_USE_POLL
86# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ 194# ifdef _WIN32
195# define EV_USE_POLL 0
196# else
197# define EV_USE_POLL 1
198# endif
87#endif 199#endif
88 200
89#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
90# define EV_USE_EPOLL 0 205# define EV_USE_EPOLL 0
206# endif
91#endif 207#endif
92 208
93#ifndef EV_USE_KQUEUE 209#ifndef EV_USE_KQUEUE
94# define EV_USE_KQUEUE 0 210# define EV_USE_KQUEUE 0
95#endif 211#endif
96 212
97#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))
98# define EV_USE_REALTIME 1 219# define EV_USE_INOTIFY 1
220# else
221# define EV_USE_INOTIFY 0
99#endif 222# endif
223#endif
100 224
101/**/ 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 */
102 268
103#ifndef CLOCK_MONOTONIC 269#ifndef CLOCK_MONOTONIC
104# undef EV_USE_MONOTONIC 270# undef EV_USE_MONOTONIC
105# define EV_USE_MONOTONIC 0 271# define EV_USE_MONOTONIC 0
106#endif 272#endif
… …
108#ifndef CLOCK_REALTIME 274#ifndef CLOCK_REALTIME
109# undef EV_USE_REALTIME 275# undef EV_USE_REALTIME
110# define EV_USE_REALTIME 0 276# define EV_USE_REALTIME 0
111#endif 277#endif
112 278
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/utsname.h>
292# include <sys/inotify.h>
293/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
294# ifndef IN_DONT_FOLLOW
295# undef EV_USE_INOTIFY
296# define EV_USE_INOTIFY 0
297# endif
298#endif
299
300#if EV_SELECT_IS_WINSOCKET
301# include <winsock.h>
302#endif
303
304#if EV_USE_EVENTFD
305/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
306# include <stdint.h>
307# ifdef __cplusplus
308extern "C" {
309# endif
310int eventfd (unsigned int initval, int flags);
311# ifdef __cplusplus
312}
313# endif
314#endif
315
113/**/ 316/**/
114 317
318#if EV_VERIFY >= 3
319# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
320#else
321# define EV_FREQUENT_CHECK do { } while (0)
322#endif
323
324/*
325 * This is used to avoid floating point rounding problems.
326 * It is added to ev_rt_now when scheduling periodics
327 * to ensure progress, time-wise, even when rounding
328 * errors are against us.
329 * This value is good at least till the year 4000.
330 * Better solutions welcome.
331 */
332#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
333
115#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 334#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
116#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 335#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
117#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
118/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ 336/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
119 337
120#include "ev.h"
121
122#if __GNUC__ >= 3 338#if __GNUC__ >= 4
123# define expect(expr,value) __builtin_expect ((expr),(value)) 339# define expect(expr,value) __builtin_expect ((expr),(value))
124# define inline inline 340# define noinline __attribute__ ((noinline))
125#else 341#else
126# define expect(expr,value) (expr) 342# define expect(expr,value) (expr)
127# define inline static 343# define noinline
344# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
345# define inline
346# endif
128#endif 347#endif
129 348
130#define expect_false(expr) expect ((expr) != 0, 0) 349#define expect_false(expr) expect ((expr) != 0, 0)
131#define expect_true(expr) expect ((expr) != 0, 1) 350#define expect_true(expr) expect ((expr) != 0, 1)
351#define inline_size static inline
352
353#if EV_MINIMAL
354# define inline_speed static noinline
355#else
356# define inline_speed static inline
357#endif
132 358
133#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 359#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
134#define ABSPRI(w) ((w)->priority - EV_MINPRI) 360#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
135 361
362#define EMPTY /* required for microsofts broken pseudo-c compiler */
363#define EMPTY2(a,b) /* used to suppress some warnings */
364
136typedef struct ev_watcher *W; 365typedef ev_watcher *W;
137typedef struct ev_watcher_list *WL; 366typedef ev_watcher_list *WL;
138typedef struct ev_watcher_time *WT; 367typedef ev_watcher_time *WT;
139 368
369#define ev_active(w) ((W)(w))->active
370#define ev_at(w) ((WT)(w))->at
371
372#if EV_USE_MONOTONIC
373/* sig_atomic_t is used to avoid per-thread variables or locking but still */
374/* giving it a reasonably high chance of working on typical architetcures */
140static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 375static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
376#endif
377
378#ifdef _WIN32
379# include "ev_win32.c"
380#endif
141 381
142/*****************************************************************************/ 382/*****************************************************************************/
143 383
384static void (*syserr_cb)(const char *msg);
385
386void
387ev_set_syserr_cb (void (*cb)(const char *msg))
388{
389 syserr_cb = cb;
390}
391
392static void noinline
393syserr (const char *msg)
394{
395 if (!msg)
396 msg = "(libev) system error";
397
398 if (syserr_cb)
399 syserr_cb (msg);
400 else
401 {
402 perror (msg);
403 abort ();
404 }
405}
406
407static void *
408ev_realloc_emul (void *ptr, long size)
409{
410 /* some systems, notably openbsd and darwin, fail to properly
411 * implement realloc (x, 0) (as required by both ansi c-98 and
412 * the single unix specification, so work around them here.
413 */
414
415 if (size)
416 return realloc (ptr, size);
417
418 free (ptr);
419 return 0;
420}
421
422static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
423
424void
425ev_set_allocator (void *(*cb)(void *ptr, long size))
426{
427 alloc = cb;
428}
429
430inline_speed void *
431ev_realloc (void *ptr, long size)
432{
433 ptr = alloc (ptr, size);
434
435 if (!ptr && size)
436 {
437 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
438 abort ();
439 }
440
441 return ptr;
442}
443
444#define ev_malloc(size) ev_realloc (0, (size))
445#define ev_free(ptr) ev_realloc ((ptr), 0)
446
447/*****************************************************************************/
448
144typedef struct 449typedef struct
145{ 450{
146 struct ev_watcher_list *head; 451 WL head;
147 unsigned char events; 452 unsigned char events;
148 unsigned char reify; 453 unsigned char reify;
454 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
455 unsigned char egen; /* generation counter to counter epoll bugs */
456#if EV_SELECT_IS_WINSOCKET
457 SOCKET handle;
458#endif
149} ANFD; 459} ANFD;
150 460
151typedef struct 461typedef struct
152{ 462{
153 W w; 463 W w;
154 int events; 464 int events;
155} ANPENDING; 465} ANPENDING;
156 466
467#if EV_USE_INOTIFY
468/* hash table entry per inotify-id */
469typedef struct
470{
471 WL head;
472} ANFS;
473#endif
474
475/* Heap Entry */
476#if EV_HEAP_CACHE_AT
477 typedef struct {
478 ev_tstamp at;
479 WT w;
480 } ANHE;
481
482 #define ANHE_w(he) (he).w /* access watcher, read-write */
483 #define ANHE_at(he) (he).at /* access cached at, read-only */
484 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
485#else
486 typedef WT ANHE;
487
488 #define ANHE_w(he) (he)
489 #define ANHE_at(he) (he)->at
490 #define ANHE_at_cache(he)
491#endif
492
157#if EV_MULTIPLICITY 493#if EV_MULTIPLICITY
158 494
159struct ev_loop 495 struct ev_loop
160{ 496 {
497 ev_tstamp ev_rt_now;
498 #define ev_rt_now ((loop)->ev_rt_now)
161# define VAR(name,decl) decl; 499 #define VAR(name,decl) decl;
162# include "ev_vars.h" 500 #include "ev_vars.h"
163};
164# undef VAR 501 #undef VAR
502 };
165# include "ev_wrap.h" 503 #include "ev_wrap.h"
504
505 static struct ev_loop default_loop_struct;
506 struct ev_loop *ev_default_loop_ptr;
166 507
167#else 508#else
168 509
510 ev_tstamp ev_rt_now;
169# define VAR(name,decl) static decl; 511 #define VAR(name,decl) static decl;
170# include "ev_vars.h" 512 #include "ev_vars.h"
171# undef VAR 513 #undef VAR
514
515 static int ev_default_loop_ptr;
172 516
173#endif 517#endif
174 518
175/*****************************************************************************/ 519/*****************************************************************************/
176 520
177inline ev_tstamp 521ev_tstamp
178ev_time (void) 522ev_time (void)
179{ 523{
180#if EV_USE_REALTIME 524#if EV_USE_REALTIME
181 struct timespec ts; 525 struct timespec ts;
182 clock_gettime (CLOCK_REALTIME, &ts); 526 clock_gettime (CLOCK_REALTIME, &ts);
… …
186 gettimeofday (&tv, 0); 530 gettimeofday (&tv, 0);
187 return tv.tv_sec + tv.tv_usec * 1e-6; 531 return tv.tv_sec + tv.tv_usec * 1e-6;
188#endif 532#endif
189} 533}
190 534
191inline ev_tstamp 535ev_tstamp inline_size
192get_clock (void) 536get_clock (void)
193{ 537{
194#if EV_USE_MONOTONIC 538#if EV_USE_MONOTONIC
195 if (expect_true (have_monotonic)) 539 if (expect_true (have_monotonic))
196 { 540 {
… …
201#endif 545#endif
202 546
203 return ev_time (); 547 return ev_time ();
204} 548}
205 549
550#if EV_MULTIPLICITY
206ev_tstamp 551ev_tstamp
207ev_now (EV_P) 552ev_now (EV_P)
208{ 553{
209 return rt_now; 554 return ev_rt_now;
210} 555}
556#endif
211 557
212#define array_roundsize(base,n) ((n) | 4 & ~3) 558void
213 559ev_sleep (ev_tstamp delay)
214#define array_needsize(base,cur,cnt,init) \ 560{
215 if (expect_false ((cnt) > cur)) \ 561 if (delay > 0.)
216 { \
217 int newcnt = cur; \
218 do \
219 { \
220 newcnt = array_roundsize (base, newcnt << 1); \
221 } \
222 while ((cnt) > newcnt); \
223 \
224 base = realloc (base, sizeof (*base) * (newcnt)); \
225 init (base + cur, newcnt - cur); \
226 cur = newcnt; \
227 } 562 {
563#if EV_USE_NANOSLEEP
564 struct timespec ts;
565
566 ts.tv_sec = (time_t)delay;
567 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
568
569 nanosleep (&ts, 0);
570#elif defined(_WIN32)
571 Sleep ((unsigned long)(delay * 1e3));
572#else
573 struct timeval tv;
574
575 tv.tv_sec = (time_t)delay;
576 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
577
578 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
579 /* somehting nto guaranteed by newer posix versions, but guaranteed */
580 /* by older ones */
581 select (0, 0, 0, 0, &tv);
582#endif
583 }
584}
228 585
229/*****************************************************************************/ 586/*****************************************************************************/
230 587
231static void 588#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
232anfds_init (ANFD *base, int count)
233{
234 while (count--)
235 {
236 base->head = 0;
237 base->events = EV_NONE;
238 base->reify = 0;
239 589
240 ++base; 590int inline_size
591array_nextsize (int elem, int cur, int cnt)
592{
593 int ncur = cur + 1;
594
595 do
596 ncur <<= 1;
597 while (cnt > ncur);
598
599 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
600 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
241 } 601 {
242} 602 ncur *= elem;
243 603 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
244static void 604 ncur = ncur - sizeof (void *) * 4;
245event (EV_P_ W w, int events) 605 ncur /= elem;
246{
247 if (w->pending)
248 { 606 }
607
608 return ncur;
609}
610
611static noinline void *
612array_realloc (int elem, void *base, int *cur, int cnt)
613{
614 *cur = array_nextsize (elem, *cur, cnt);
615 return ev_realloc (base, elem * *cur);
616}
617
618#define array_init_zero(base,count) \
619 memset ((void *)(base), 0, sizeof (*(base)) * (count))
620
621#define array_needsize(type,base,cur,cnt,init) \
622 if (expect_false ((cnt) > (cur))) \
623 { \
624 int ocur_ = (cur); \
625 (base) = (type *)array_realloc \
626 (sizeof (type), (base), &(cur), (cnt)); \
627 init ((base) + (ocur_), (cur) - ocur_); \
628 }
629
630#if 0
631#define array_slim(type,stem) \
632 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
633 { \
634 stem ## max = array_roundsize (stem ## cnt >> 1); \
635 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
636 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
637 }
638#endif
639
640#define array_free(stem, idx) \
641 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
642
643/*****************************************************************************/
644
645void noinline
646ev_feed_event (EV_P_ void *w, int revents)
647{
648 W w_ = (W)w;
649 int pri = ABSPRI (w_);
650
651 if (expect_false (w_->pending))
652 pendings [pri][w_->pending - 1].events |= revents;
653 else
654 {
655 w_->pending = ++pendingcnt [pri];
656 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
657 pendings [pri][w_->pending - 1].w = w_;
249 pendings [ABSPRI (w)][w->pending - 1].events |= events; 658 pendings [pri][w_->pending - 1].events = revents;
250 return;
251 } 659 }
252
253 w->pending = ++pendingcnt [ABSPRI (w)];
254 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
255 pendings [ABSPRI (w)][w->pending - 1].w = w;
256 pendings [ABSPRI (w)][w->pending - 1].events = events;
257} 660}
258 661
259static void 662void inline_speed
260queue_events (EV_P_ W *events, int eventcnt, int type) 663queue_events (EV_P_ W *events, int eventcnt, int type)
261{ 664{
262 int i; 665 int i;
263 666
264 for (i = 0; i < eventcnt; ++i) 667 for (i = 0; i < eventcnt; ++i)
265 event (EV_A_ events [i], type); 668 ev_feed_event (EV_A_ events [i], type);
266} 669}
267 670
268static void 671/*****************************************************************************/
672
673void inline_speed
269fd_event (EV_P_ int fd, int events) 674fd_event (EV_P_ int fd, int revents)
270{ 675{
271 ANFD *anfd = anfds + fd; 676 ANFD *anfd = anfds + fd;
272 struct ev_io *w; 677 ev_io *w;
273 678
274 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 679 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
275 { 680 {
276 int ev = w->events & events; 681 int ev = w->events & revents;
277 682
278 if (ev) 683 if (ev)
279 event (EV_A_ (W)w, ev); 684 ev_feed_event (EV_A_ (W)w, ev);
280 } 685 }
281} 686}
282 687
283/*****************************************************************************/ 688void
689ev_feed_fd_event (EV_P_ int fd, int revents)
690{
691 if (fd >= 0 && fd < anfdmax)
692 fd_event (EV_A_ fd, revents);
693}
284 694
285static void 695void inline_size
286fd_reify (EV_P) 696fd_reify (EV_P)
287{ 697{
288 int i; 698 int i;
289 699
290 for (i = 0; i < fdchangecnt; ++i) 700 for (i = 0; i < fdchangecnt; ++i)
291 { 701 {
292 int fd = fdchanges [i]; 702 int fd = fdchanges [i];
293 ANFD *anfd = anfds + fd; 703 ANFD *anfd = anfds + fd;
294 struct ev_io *w; 704 ev_io *w;
295 705
296 int events = 0; 706 unsigned char events = 0;
297 707
298 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 708 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
299 events |= w->events; 709 events |= (unsigned char)w->events;
300 710
301 anfd->reify = 0; 711#if EV_SELECT_IS_WINSOCKET
302 712 if (events)
303 if (anfd->events != events)
304 { 713 {
305 method_modify (EV_A_ fd, anfd->events, events); 714 unsigned long arg;
306 anfd->events = events; 715 #ifdef EV_FD_TO_WIN32_HANDLE
716 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
717 #else
718 anfd->handle = _get_osfhandle (fd);
719 #endif
720 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
307 } 721 }
722#endif
723
724 {
725 unsigned char o_events = anfd->events;
726 unsigned char o_reify = anfd->reify;
727
728 anfd->reify = 0;
729 anfd->events = events;
730
731 if (o_events != events || o_reify & EV_IOFDSET)
732 backend_modify (EV_A_ fd, o_events, events);
733 }
308 } 734 }
309 735
310 fdchangecnt = 0; 736 fdchangecnt = 0;
311} 737}
312 738
313static void 739void inline_size
314fd_change (EV_P_ int fd) 740fd_change (EV_P_ int fd, int flags)
315{ 741{
316 if (anfds [fd].reify || fdchangecnt < 0) 742 unsigned char reify = anfds [fd].reify;
317 return;
318
319 anfds [fd].reify = 1; 743 anfds [fd].reify |= flags;
320 744
745 if (expect_true (!reify))
746 {
321 ++fdchangecnt; 747 ++fdchangecnt;
322 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 748 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
323 fdchanges [fdchangecnt - 1] = fd; 749 fdchanges [fdchangecnt - 1] = fd;
750 }
324} 751}
325 752
326static void 753void inline_speed
327fd_kill (EV_P_ int fd) 754fd_kill (EV_P_ int fd)
328{ 755{
329 struct ev_io *w; 756 ev_io *w;
330 757
331 while ((w = (struct ev_io *)anfds [fd].head)) 758 while ((w = (ev_io *)anfds [fd].head))
332 { 759 {
333 ev_io_stop (EV_A_ w); 760 ev_io_stop (EV_A_ w);
334 event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 761 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
335 } 762 }
763}
764
765int inline_size
766fd_valid (int fd)
767{
768#ifdef _WIN32
769 return _get_osfhandle (fd) != -1;
770#else
771 return fcntl (fd, F_GETFD) != -1;
772#endif
336} 773}
337 774
338/* called on EBADF to verify fds */ 775/* called on EBADF to verify fds */
339static void 776static void noinline
340fd_ebadf (EV_P) 777fd_ebadf (EV_P)
341{ 778{
342 int fd; 779 int fd;
343 780
344 for (fd = 0; fd < anfdmax; ++fd) 781 for (fd = 0; fd < anfdmax; ++fd)
345 if (anfds [fd].events) 782 if (anfds [fd].events)
346 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 783 if (!fd_valid (fd) && errno == EBADF)
347 fd_kill (EV_A_ fd); 784 fd_kill (EV_A_ fd);
348} 785}
349 786
350/* called on ENOMEM in select/poll to kill some fds and retry */ 787/* called on ENOMEM in select/poll to kill some fds and retry */
351static void 788static void noinline
352fd_enomem (EV_P) 789fd_enomem (EV_P)
353{ 790{
354 int fd = anfdmax; 791 int fd;
355 792
356 while (fd--) 793 for (fd = anfdmax; fd--; )
357 if (anfds [fd].events) 794 if (anfds [fd].events)
358 { 795 {
359 close (fd);
360 fd_kill (EV_A_ fd); 796 fd_kill (EV_A_ fd);
361 return; 797 return;
362 } 798 }
363} 799}
364 800
365/* susually called after fork if method needs to re-arm all fds from scratch */ 801/* usually called after fork if backend needs to re-arm all fds from scratch */
366static void 802static void noinline
367fd_rearm_all (EV_P) 803fd_rearm_all (EV_P)
368{ 804{
369 int fd; 805 int fd;
370 806
371 /* this should be highly optimised to not do anything but set a flag */
372 for (fd = 0; fd < anfdmax; ++fd) 807 for (fd = 0; fd < anfdmax; ++fd)
373 if (anfds [fd].events) 808 if (anfds [fd].events)
374 { 809 {
375 anfds [fd].events = 0; 810 anfds [fd].events = 0;
376 fd_change (EV_A_ fd); 811 fd_change (EV_A_ fd, EV_IOFDSET | 1);
377 } 812 }
378} 813}
379 814
380/*****************************************************************************/ 815/*****************************************************************************/
381 816
382static void 817/*
383upheap (WT *heap, int k) 818 * the heap functions want a real array index. array index 0 uis guaranteed to not
384{ 819 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
385 WT w = heap [k]; 820 * the branching factor of the d-tree.
821 */
386 822
387 while (k && heap [k >> 1]->at > w->at) 823/*
388 { 824 * at the moment we allow libev the luxury of two heaps,
389 heap [k] = heap [k >> 1]; 825 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
390 heap [k]->active = k + 1; 826 * which is more cache-efficient.
391 k >>= 1; 827 * the difference is about 5% with 50000+ watchers.
392 } 828 */
829#if EV_USE_4HEAP
393 830
394 heap [k] = w; 831#define DHEAP 4
395 heap [k]->active = k + 1; 832#define HEAP0 (DHEAP - 1) /* index of first element in heap */
833#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
834#define UPHEAP_DONE(p,k) ((p) == (k))
396 835
397} 836/* away from the root */
398 837void inline_speed
399static void
400downheap (WT *heap, int N, int k) 838downheap (ANHE *heap, int N, int k)
401{ 839{
402 WT w = heap [k]; 840 ANHE he = heap [k];
841 ANHE *E = heap + N + HEAP0;
403 842
404 while (k < (N >> 1)) 843 for (;;)
405 { 844 {
406 int j = k << 1; 845 ev_tstamp minat;
846 ANHE *minpos;
847 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
407 848
408 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 849 /* find minimum child */
850 if (expect_true (pos + DHEAP - 1 < E))
409 ++j; 851 {
410 852 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
411 if (w->at <= heap [j]->at) 853 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
854 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
855 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
856 }
857 else if (pos < E)
858 {
859 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
860 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
861 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
862 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
863 }
864 else
412 break; 865 break;
413 866
867 if (ANHE_at (he) <= minat)
868 break;
869
870 heap [k] = *minpos;
871 ev_active (ANHE_w (*minpos)) = k;
872
873 k = minpos - heap;
874 }
875
876 heap [k] = he;
877 ev_active (ANHE_w (he)) = k;
878}
879
880#else /* 4HEAP */
881
882#define HEAP0 1
883#define HPARENT(k) ((k) >> 1)
884#define UPHEAP_DONE(p,k) (!(p))
885
886/* away from the root */
887void inline_speed
888downheap (ANHE *heap, int N, int k)
889{
890 ANHE he = heap [k];
891
892 for (;;)
893 {
894 int c = k << 1;
895
896 if (c > N + HEAP0 - 1)
897 break;
898
899 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
900 ? 1 : 0;
901
902 if (ANHE_at (he) <= ANHE_at (heap [c]))
903 break;
904
414 heap [k] = heap [j]; 905 heap [k] = heap [c];
415 heap [k]->active = k + 1; 906 ev_active (ANHE_w (heap [k])) = k;
907
416 k = j; 908 k = c;
417 } 909 }
418 910
419 heap [k] = w; 911 heap [k] = he;
420 heap [k]->active = k + 1; 912 ev_active (ANHE_w (he)) = k;
913}
914#endif
915
916/* towards the root */
917void inline_speed
918upheap (ANHE *heap, int k)
919{
920 ANHE he = heap [k];
921
922 for (;;)
923 {
924 int p = HPARENT (k);
925
926 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
927 break;
928
929 heap [k] = heap [p];
930 ev_active (ANHE_w (heap [k])) = k;
931 k = p;
932 }
933
934 heap [k] = he;
935 ev_active (ANHE_w (he)) = k;
936}
937
938void inline_size
939adjustheap (ANHE *heap, int N, int k)
940{
941 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
942 upheap (heap, k);
943 else
944 downheap (heap, N, k);
945}
946
947/* rebuild the heap: this function is used only once and executed rarely */
948void inline_size
949reheap (ANHE *heap, int N)
950{
951 int i;
952
953 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
954 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
955 for (i = 0; i < N; ++i)
956 upheap (heap, i + HEAP0);
421} 957}
422 958
423/*****************************************************************************/ 959/*****************************************************************************/
424 960
425typedef struct 961typedef struct
426{ 962{
427 struct ev_watcher_list *head; 963 WL head;
428 sig_atomic_t volatile gotsig; 964 EV_ATOMIC_T gotsig;
429} ANSIG; 965} ANSIG;
430 966
431static ANSIG *signals; 967static ANSIG *signals;
432static int signalmax; 968static int signalmax;
433 969
434static int sigpipe [2]; 970static EV_ATOMIC_T gotsig;
435static sig_atomic_t volatile gotsig; 971
436static struct ev_io sigev; 972/*****************************************************************************/
973
974void inline_speed
975fd_intern (int fd)
976{
977#ifdef _WIN32
978 unsigned long arg = 1;
979 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
980#else
981 fcntl (fd, F_SETFD, FD_CLOEXEC);
982 fcntl (fd, F_SETFL, O_NONBLOCK);
983#endif
984}
985
986static void noinline
987evpipe_init (EV_P)
988{
989 if (!ev_is_active (&pipeev))
990 {
991#if EV_USE_EVENTFD
992 if ((evfd = eventfd (0, 0)) >= 0)
993 {
994 evpipe [0] = -1;
995 fd_intern (evfd);
996 ev_io_set (&pipeev, evfd, EV_READ);
997 }
998 else
999#endif
1000 {
1001 while (pipe (evpipe))
1002 syserr ("(libev) error creating signal/async pipe");
1003
1004 fd_intern (evpipe [0]);
1005 fd_intern (evpipe [1]);
1006 ev_io_set (&pipeev, evpipe [0], EV_READ);
1007 }
1008
1009 ev_io_start (EV_A_ &pipeev);
1010 ev_unref (EV_A); /* watcher should not keep loop alive */
1011 }
1012}
1013
1014void inline_size
1015evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1016{
1017 if (!*flag)
1018 {
1019 int old_errno = errno; /* save errno because write might clobber it */
1020
1021 *flag = 1;
1022
1023#if EV_USE_EVENTFD
1024 if (evfd >= 0)
1025 {
1026 uint64_t counter = 1;
1027 write (evfd, &counter, sizeof (uint64_t));
1028 }
1029 else
1030#endif
1031 write (evpipe [1], &old_errno, 1);
1032
1033 errno = old_errno;
1034 }
1035}
437 1036
438static void 1037static void
439signals_init (ANSIG *base, int count) 1038pipecb (EV_P_ ev_io *iow, int revents)
440{ 1039{
441 while (count--) 1040#if EV_USE_EVENTFD
1041 if (evfd >= 0)
1042 {
1043 uint64_t counter;
1044 read (evfd, &counter, sizeof (uint64_t));
442 { 1045 }
443 base->head = 0; 1046 else
1047#endif
1048 {
1049 char dummy;
1050 read (evpipe [0], &dummy, 1);
1051 }
1052
1053 if (gotsig && ev_is_default_loop (EV_A))
1054 {
1055 int signum;
444 base->gotsig = 0; 1056 gotsig = 0;
445 1057
446 ++base; 1058 for (signum = signalmax; signum--; )
1059 if (signals [signum].gotsig)
1060 ev_feed_signal_event (EV_A_ signum + 1);
1061 }
1062
1063#if EV_ASYNC_ENABLE
1064 if (gotasync)
447 } 1065 {
1066 int i;
1067 gotasync = 0;
1068
1069 for (i = asynccnt; i--; )
1070 if (asyncs [i]->sent)
1071 {
1072 asyncs [i]->sent = 0;
1073 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1074 }
1075 }
1076#endif
448} 1077}
1078
1079/*****************************************************************************/
449 1080
450static void 1081static void
451sighandler (int signum) 1082ev_sighandler (int signum)
452{ 1083{
1084#if EV_MULTIPLICITY
1085 struct ev_loop *loop = &default_loop_struct;
1086#endif
1087
1088#if _WIN32
1089 signal (signum, ev_sighandler);
1090#endif
1091
453 signals [signum - 1].gotsig = 1; 1092 signals [signum - 1].gotsig = 1;
454 1093 evpipe_write (EV_A_ &gotsig);
455 if (!gotsig)
456 {
457 int old_errno = errno;
458 gotsig = 1;
459 write (sigpipe [1], &signum, 1);
460 errno = old_errno;
461 }
462} 1094}
463 1095
464static void 1096void noinline
465sigcb (EV_P_ struct ev_io *iow, int revents) 1097ev_feed_signal_event (EV_P_ int signum)
466{ 1098{
467 struct ev_watcher_list *w; 1099 WL w;
1100
1101#if EV_MULTIPLICITY
1102 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1103#endif
1104
468 int signum; 1105 --signum;
469 1106
470 read (sigpipe [0], &revents, 1); 1107 if (signum < 0 || signum >= signalmax)
471 gotsig = 0; 1108 return;
472 1109
473 for (signum = signalmax; signum--; )
474 if (signals [signum].gotsig)
475 {
476 signals [signum].gotsig = 0; 1110 signals [signum].gotsig = 0;
477 1111
478 for (w = signals [signum].head; w; w = w->next) 1112 for (w = signals [signum].head; w; w = w->next)
479 event (EV_A_ (W)w, EV_SIGNAL); 1113 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
480 }
481}
482
483static void
484siginit (EV_P)
485{
486#ifndef WIN32
487 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
488 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
489
490 /* rather than sort out wether we really need nb, set it */
491 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
492 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
493#endif
494
495 ev_io_set (&sigev, sigpipe [0], EV_READ);
496 ev_io_start (EV_A_ &sigev);
497 ev_unref (EV_A); /* child watcher should not keep loop alive */
498} 1114}
499 1115
500/*****************************************************************************/ 1116/*****************************************************************************/
501 1117
1118static WL childs [EV_PID_HASHSIZE];
1119
502#ifndef WIN32 1120#ifndef _WIN32
503 1121
504static struct ev_child *childs [PID_HASHSIZE];
505static struct ev_signal childev; 1122static ev_signal childev;
1123
1124#ifndef WIFCONTINUED
1125# define WIFCONTINUED(status) 0
1126#endif
1127
1128void inline_speed
1129child_reap (EV_P_ int chain, int pid, int status)
1130{
1131 ev_child *w;
1132 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1133
1134 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1135 {
1136 if ((w->pid == pid || !w->pid)
1137 && (!traced || (w->flags & 1)))
1138 {
1139 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1140 w->rpid = pid;
1141 w->rstatus = status;
1142 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1143 }
1144 }
1145}
506 1146
507#ifndef WCONTINUED 1147#ifndef WCONTINUED
508# define WCONTINUED 0 1148# define WCONTINUED 0
509#endif 1149#endif
510 1150
511static void 1151static void
512child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
513{
514 struct ev_child *w;
515
516 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
517 if (w->pid == pid || !w->pid)
518 {
519 w->priority = sw->priority; /* need to do it *now* */
520 w->rpid = pid;
521 w->rstatus = status;
522 event (EV_A_ (W)w, EV_CHILD);
523 }
524}
525
526static void
527childcb (EV_P_ struct ev_signal *sw, int revents) 1152childcb (EV_P_ ev_signal *sw, int revents)
528{ 1153{
529 int pid, status; 1154 int pid, status;
530 1155
1156 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
531 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1157 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
532 { 1158 if (!WCONTINUED
1159 || errno != EINVAL
1160 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1161 return;
1162
533 /* make sure we are called again until all childs have been reaped */ 1163 /* make sure we are called again until all children have been reaped */
1164 /* we need to do it this way so that the callback gets called before we continue */
534 event (EV_A_ (W)sw, EV_SIGNAL); 1165 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
535 1166
536 child_reap (EV_A_ sw, pid, pid, status); 1167 child_reap (EV_A_ pid, pid, status);
1168 if (EV_PID_HASHSIZE > 1)
537 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1169 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
538 }
539} 1170}
540 1171
541#endif 1172#endif
542 1173
543/*****************************************************************************/ 1174/*****************************************************************************/
544 1175
1176#if EV_USE_PORT
1177# include "ev_port.c"
1178#endif
545#if EV_USE_KQUEUE 1179#if EV_USE_KQUEUE
546# include "ev_kqueue.c" 1180# include "ev_kqueue.c"
547#endif 1181#endif
548#if EV_USE_EPOLL 1182#if EV_USE_EPOLL
549# include "ev_epoll.c" 1183# include "ev_epoll.c"
… …
566{ 1200{
567 return EV_VERSION_MINOR; 1201 return EV_VERSION_MINOR;
568} 1202}
569 1203
570/* return true if we are running with elevated privileges and should ignore env variables */ 1204/* return true if we are running with elevated privileges and should ignore env variables */
571static int 1205int inline_size
572enable_secure (void) 1206enable_secure (void)
573{ 1207{
574#ifdef WIN32 1208#ifdef _WIN32
575 return 0; 1209 return 0;
576#else 1210#else
577 return getuid () != geteuid () 1211 return getuid () != geteuid ()
578 || getgid () != getegid (); 1212 || getgid () != getegid ();
579#endif 1213#endif
580} 1214}
581 1215
582int 1216unsigned int
583ev_method (EV_P) 1217ev_supported_backends (void)
584{ 1218{
585 return method; 1219 unsigned int flags = 0;
586}
587 1220
588static void 1221 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
589loop_init (EV_P_ int methods) 1222 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1223 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1224 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1225 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1226
1227 return flags;
1228}
1229
1230unsigned int
1231ev_recommended_backends (void)
590{ 1232{
591 if (!method) 1233 unsigned int flags = ev_supported_backends ();
1234
1235#ifndef __NetBSD__
1236 /* kqueue is borked on everything but netbsd apparently */
1237 /* it usually doesn't work correctly on anything but sockets and pipes */
1238 flags &= ~EVBACKEND_KQUEUE;
1239#endif
1240#ifdef __APPLE__
1241 // flags &= ~EVBACKEND_KQUEUE; for documentation
1242 flags &= ~EVBACKEND_POLL;
1243#endif
1244
1245 return flags;
1246}
1247
1248unsigned int
1249ev_embeddable_backends (void)
1250{
1251 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1252
1253 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1254 /* please fix it and tell me how to detect the fix */
1255 flags &= ~EVBACKEND_EPOLL;
1256
1257 return flags;
1258}
1259
1260unsigned int
1261ev_backend (EV_P)
1262{
1263 return backend;
1264}
1265
1266unsigned int
1267ev_loop_count (EV_P)
1268{
1269 return loop_count;
1270}
1271
1272void
1273ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1274{
1275 io_blocktime = interval;
1276}
1277
1278void
1279ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1280{
1281 timeout_blocktime = interval;
1282}
1283
1284static void noinline
1285loop_init (EV_P_ unsigned int flags)
1286{
1287 if (!backend)
592 { 1288 {
593#if EV_USE_MONOTONIC 1289#if EV_USE_MONOTONIC
594 { 1290 {
595 struct timespec ts; 1291 struct timespec ts;
596 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1292 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
597 have_monotonic = 1; 1293 have_monotonic = 1;
598 } 1294 }
599#endif 1295#endif
600 1296
601 rt_now = ev_time (); 1297 ev_rt_now = ev_time ();
602 mn_now = get_clock (); 1298 mn_now = get_clock ();
603 now_floor = mn_now; 1299 now_floor = mn_now;
604 rtmn_diff = rt_now - mn_now; 1300 rtmn_diff = ev_rt_now - mn_now;
605 1301
606 if (methods == EVMETHOD_AUTO) 1302 io_blocktime = 0.;
607 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1303 timeout_blocktime = 0.;
1304 backend = 0;
1305 backend_fd = -1;
1306 gotasync = 0;
1307#if EV_USE_INOTIFY
1308 fs_fd = -2;
1309#endif
1310
1311 /* pid check not overridable via env */
1312#ifndef _WIN32
1313 if (flags & EVFLAG_FORKCHECK)
1314 curpid = getpid ();
1315#endif
1316
1317 if (!(flags & EVFLAG_NOENV)
1318 && !enable_secure ()
1319 && getenv ("LIBEV_FLAGS"))
608 methods = atoi (getenv ("LIBEV_METHODS")); 1320 flags = atoi (getenv ("LIBEV_FLAGS"));
609 else
610 methods = EVMETHOD_ANY;
611 1321
612 method = 0; 1322 if (!(flags & 0x0000ffffU))
1323 flags |= ev_recommended_backends ();
1324
1325#if EV_USE_PORT
1326 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1327#endif
613#if EV_USE_KQUEUE 1328#if EV_USE_KQUEUE
614 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 1329 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
615#endif 1330#endif
616#if EV_USE_EPOLL 1331#if EV_USE_EPOLL
617 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 1332 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
618#endif 1333#endif
619#if EV_USE_POLL 1334#if EV_USE_POLL
620 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 1335 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
621#endif 1336#endif
622#if EV_USE_SELECT 1337#if EV_USE_SELECT
623 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 1338 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
624#endif 1339#endif
625 }
626}
627 1340
628void 1341 ev_init (&pipeev, pipecb);
1342 ev_set_priority (&pipeev, EV_MAXPRI);
1343 }
1344}
1345
1346static void noinline
629loop_destroy (EV_P) 1347loop_destroy (EV_P)
630{ 1348{
1349 int i;
1350
1351 if (ev_is_active (&pipeev))
1352 {
1353 ev_ref (EV_A); /* signal watcher */
1354 ev_io_stop (EV_A_ &pipeev);
1355
1356#if EV_USE_EVENTFD
1357 if (evfd >= 0)
1358 close (evfd);
1359#endif
1360
1361 if (evpipe [0] >= 0)
1362 {
1363 close (evpipe [0]);
1364 close (evpipe [1]);
1365 }
1366 }
1367
1368#if EV_USE_INOTIFY
1369 if (fs_fd >= 0)
1370 close (fs_fd);
1371#endif
1372
1373 if (backend_fd >= 0)
1374 close (backend_fd);
1375
1376#if EV_USE_PORT
1377 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1378#endif
631#if EV_USE_KQUEUE 1379#if EV_USE_KQUEUE
632 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1380 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
633#endif 1381#endif
634#if EV_USE_EPOLL 1382#if EV_USE_EPOLL
635 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1383 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
636#endif 1384#endif
637#if EV_USE_POLL 1385#if EV_USE_POLL
638 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1386 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
639#endif 1387#endif
640#if EV_USE_SELECT 1388#if EV_USE_SELECT
641 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1389 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
642#endif 1390#endif
643 1391
644 method = 0; 1392 for (i = NUMPRI; i--; )
645 /*TODO*/ 1393 {
646} 1394 array_free (pending, [i]);
1395#if EV_IDLE_ENABLE
1396 array_free (idle, [i]);
1397#endif
1398 }
647 1399
648void 1400 ev_free (anfds); anfdmax = 0;
1401
1402 /* have to use the microsoft-never-gets-it-right macro */
1403 array_free (fdchange, EMPTY);
1404 array_free (timer, EMPTY);
1405#if EV_PERIODIC_ENABLE
1406 array_free (periodic, EMPTY);
1407#endif
1408#if EV_FORK_ENABLE
1409 array_free (fork, EMPTY);
1410#endif
1411 array_free (prepare, EMPTY);
1412 array_free (check, EMPTY);
1413#if EV_ASYNC_ENABLE
1414 array_free (async, EMPTY);
1415#endif
1416
1417 backend = 0;
1418}
1419
1420#if EV_USE_INOTIFY
1421void inline_size infy_fork (EV_P);
1422#endif
1423
1424void inline_size
649loop_fork (EV_P) 1425loop_fork (EV_P)
650{ 1426{
651 /*TODO*/ 1427#if EV_USE_PORT
1428 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1429#endif
1430#if EV_USE_KQUEUE
1431 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1432#endif
652#if EV_USE_EPOLL 1433#if EV_USE_EPOLL
653 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1434 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1435#endif
1436#if EV_USE_INOTIFY
1437 infy_fork (EV_A);
1438#endif
1439
1440 if (ev_is_active (&pipeev))
1441 {
1442 /* this "locks" the handlers against writing to the pipe */
1443 /* while we modify the fd vars */
1444 gotsig = 1;
1445#if EV_ASYNC_ENABLE
1446 gotasync = 1;
1447#endif
1448
1449 ev_ref (EV_A);
1450 ev_io_stop (EV_A_ &pipeev);
1451
1452#if EV_USE_EVENTFD
1453 if (evfd >= 0)
1454 close (evfd);
1455#endif
1456
1457 if (evpipe [0] >= 0)
1458 {
1459 close (evpipe [0]);
1460 close (evpipe [1]);
1461 }
1462
1463 evpipe_init (EV_A);
1464 /* now iterate over everything, in case we missed something */
1465 pipecb (EV_A_ &pipeev, EV_READ);
1466 }
1467
1468 postfork = 0;
1469}
1470
1471#if EV_MULTIPLICITY
1472
1473struct ev_loop *
1474ev_loop_new (unsigned int flags)
1475{
1476 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1477
1478 memset (loop, 0, sizeof (struct ev_loop));
1479
1480 loop_init (EV_A_ flags);
1481
1482 if (ev_backend (EV_A))
1483 return loop;
1484
1485 return 0;
1486}
1487
1488void
1489ev_loop_destroy (EV_P)
1490{
1491 loop_destroy (EV_A);
1492 ev_free (loop);
1493}
1494
1495void
1496ev_loop_fork (EV_P)
1497{
1498 postfork = 1; /* must be in line with ev_default_fork */
1499}
1500
1501#if EV_VERIFY
1502static void noinline
1503verify_watcher (EV_P_ W w)
1504{
1505 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1506
1507 if (w->pending)
1508 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1509}
1510
1511static void noinline
1512verify_heap (EV_P_ ANHE *heap, int N)
1513{
1514 int i;
1515
1516 for (i = HEAP0; i < N + HEAP0; ++i)
1517 {
1518 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1519 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1520 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1521
1522 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1523 }
1524}
1525
1526static void noinline
1527array_verify (EV_P_ W *ws, int cnt)
1528{
1529 while (cnt--)
1530 {
1531 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1532 verify_watcher (EV_A_ ws [cnt]);
1533 }
1534}
1535#endif
1536
1537void
1538ev_loop_verify (EV_P)
1539{
1540#if EV_VERIFY
1541 int i;
1542 WL w;
1543
1544 assert (activecnt >= -1);
1545
1546 assert (fdchangemax >= fdchangecnt);
1547 for (i = 0; i < fdchangecnt; ++i)
1548 assert (("negative fd in fdchanges", fdchanges [i] >= 0));
1549
1550 assert (anfdmax >= 0);
1551 for (i = 0; i < anfdmax; ++i)
1552 for (w = anfds [i].head; w; w = w->next)
1553 {
1554 verify_watcher (EV_A_ (W)w);
1555 assert (("inactive fd watcher on anfd list", ev_active (w) == 1));
1556 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1557 }
1558
1559 assert (timermax >= timercnt);
1560 verify_heap (EV_A_ timers, timercnt);
1561
1562#if EV_PERIODIC_ENABLE
1563 assert (periodicmax >= periodiccnt);
1564 verify_heap (EV_A_ periodics, periodiccnt);
1565#endif
1566
1567 for (i = NUMPRI; i--; )
1568 {
1569 assert (pendingmax [i] >= pendingcnt [i]);
1570#if EV_IDLE_ENABLE
1571 assert (idleall >= 0);
1572 assert (idlemax [i] >= idlecnt [i]);
1573 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1574#endif
1575 }
1576
1577#if EV_FORK_ENABLE
1578 assert (forkmax >= forkcnt);
1579 array_verify (EV_A_ (W *)forks, forkcnt);
1580#endif
1581
1582#if EV_ASYNC_ENABLE
1583 assert (asyncmax >= asynccnt);
1584 array_verify (EV_A_ (W *)asyncs, asynccnt);
1585#endif
1586
1587 assert (preparemax >= preparecnt);
1588 array_verify (EV_A_ (W *)prepares, preparecnt);
1589
1590 assert (checkmax >= checkcnt);
1591 array_verify (EV_A_ (W *)checks, checkcnt);
1592
1593# if 0
1594 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1595 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
654#endif 1596# endif
655#if EV_USE_KQUEUE
656 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
657#endif 1597#endif
658} 1598}
1599
1600#endif /* multiplicity */
659 1601
660#if EV_MULTIPLICITY 1602#if EV_MULTIPLICITY
661struct ev_loop * 1603struct ev_loop *
662ev_loop_new (int methods) 1604ev_default_loop_init (unsigned int flags)
663{ 1605#else
664 struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop)); 1606int
665 1607ev_default_loop (unsigned int flags)
666 loop_init (EV_A_ methods);
667
668 if (ev_method (EV_A))
669 return loop;
670
671 return 0;
672}
673
674void
675ev_loop_destroy (EV_P)
676{
677 loop_destroy (EV_A);
678 free (loop);
679}
680
681void
682ev_loop_fork (EV_P)
683{
684 loop_fork (EV_A);
685}
686
687#endif 1608#endif
688 1609{
1610 if (!ev_default_loop_ptr)
1611 {
689#if EV_MULTIPLICITY 1612#if EV_MULTIPLICITY
690struct ev_loop default_loop_struct; 1613 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
691static struct ev_loop *default_loop;
692
693struct ev_loop *
694#else 1614#else
695static int default_loop;
696
697int
698#endif
699ev_default_loop (int methods)
700{
701 if (sigpipe [0] == sigpipe [1])
702 if (pipe (sigpipe))
703 return 0;
704
705 if (!default_loop)
706 {
707#if EV_MULTIPLICITY
708 struct ev_loop *loop = default_loop = &default_loop_struct;
709#else
710 default_loop = 1; 1615 ev_default_loop_ptr = 1;
711#endif 1616#endif
712 1617
713 loop_init (EV_A_ methods); 1618 loop_init (EV_A_ flags);
714 1619
715 if (ev_method (EV_A)) 1620 if (ev_backend (EV_A))
716 { 1621 {
717 ev_watcher_init (&sigev, sigcb);
718 ev_set_priority (&sigev, EV_MAXPRI);
719 siginit (EV_A);
720
721#ifndef WIN32 1622#ifndef _WIN32
722 ev_signal_init (&childev, childcb, SIGCHLD); 1623 ev_signal_init (&childev, childcb, SIGCHLD);
723 ev_set_priority (&childev, EV_MAXPRI); 1624 ev_set_priority (&childev, EV_MAXPRI);
724 ev_signal_start (EV_A_ &childev); 1625 ev_signal_start (EV_A_ &childev);
725 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1626 ev_unref (EV_A); /* child watcher should not keep loop alive */
726#endif 1627#endif
727 } 1628 }
728 else 1629 else
729 default_loop = 0; 1630 ev_default_loop_ptr = 0;
730 } 1631 }
731 1632
732 return default_loop; 1633 return ev_default_loop_ptr;
733} 1634}
734 1635
735void 1636void
736ev_default_destroy (void) 1637ev_default_destroy (void)
737{ 1638{
738#if EV_MULTIPLICITY 1639#if EV_MULTIPLICITY
739 struct ev_loop *loop = default_loop; 1640 struct ev_loop *loop = ev_default_loop_ptr;
740#endif 1641#endif
741 1642
1643 ev_default_loop_ptr = 0;
1644
1645#ifndef _WIN32
742 ev_ref (EV_A); /* child watcher */ 1646 ev_ref (EV_A); /* child watcher */
743 ev_signal_stop (EV_A_ &childev); 1647 ev_signal_stop (EV_A_ &childev);
744 1648#endif
745 ev_ref (EV_A); /* signal watcher */
746 ev_io_stop (EV_A_ &sigev);
747
748 close (sigpipe [0]); sigpipe [0] = 0;
749 close (sigpipe [1]); sigpipe [1] = 0;
750 1649
751 loop_destroy (EV_A); 1650 loop_destroy (EV_A);
752} 1651}
753 1652
754void 1653void
755ev_default_fork (void) 1654ev_default_fork (void)
756{ 1655{
757#if EV_MULTIPLICITY 1656#if EV_MULTIPLICITY
758 struct ev_loop *loop = default_loop; 1657 struct ev_loop *loop = ev_default_loop_ptr;
759#endif 1658#endif
760 1659
761 loop_fork (EV_A); 1660 if (backend)
762 1661 postfork = 1; /* must be in line with ev_loop_fork */
763 ev_io_stop (EV_A_ &sigev);
764 close (sigpipe [0]);
765 close (sigpipe [1]);
766 pipe (sigpipe);
767
768 ev_ref (EV_A); /* signal watcher */
769 siginit (EV_A);
770} 1662}
771 1663
772/*****************************************************************************/ 1664/*****************************************************************************/
773 1665
774static void 1666void
1667ev_invoke (EV_P_ void *w, int revents)
1668{
1669 EV_CB_INVOKE ((W)w, revents);
1670}
1671
1672void inline_speed
775call_pending (EV_P) 1673call_pending (EV_P)
776{ 1674{
777 int pri; 1675 int pri;
778 1676
779 for (pri = NUMPRI; pri--; ) 1677 for (pri = NUMPRI; pri--; )
780 while (pendingcnt [pri]) 1678 while (pendingcnt [pri])
781 { 1679 {
782 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1680 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
783 1681
784 if (p->w) 1682 if (expect_true (p->w))
785 { 1683 {
1684 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1685
786 p->w->pending = 0; 1686 p->w->pending = 0;
787 p->w->cb (EV_A_ p->w, p->events); 1687 EV_CB_INVOKE (p->w, p->events);
1688 EV_FREQUENT_CHECK;
788 } 1689 }
789 } 1690 }
790} 1691}
791 1692
792static void 1693#if EV_IDLE_ENABLE
1694void inline_size
1695idle_reify (EV_P)
1696{
1697 if (expect_false (idleall))
1698 {
1699 int pri;
1700
1701 for (pri = NUMPRI; pri--; )
1702 {
1703 if (pendingcnt [pri])
1704 break;
1705
1706 if (idlecnt [pri])
1707 {
1708 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1709 break;
1710 }
1711 }
1712 }
1713}
1714#endif
1715
1716void inline_size
793timers_reify (EV_P) 1717timers_reify (EV_P)
794{ 1718{
1719 EV_FREQUENT_CHECK;
1720
795 while (timercnt && timers [0]->at <= mn_now) 1721 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
796 { 1722 {
797 struct ev_timer *w = timers [0]; 1723 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
798 1724
799 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1725 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
800 1726
801 /* first reschedule or stop timer */ 1727 /* first reschedule or stop timer */
802 if (w->repeat) 1728 if (w->repeat)
803 { 1729 {
1730 ev_at (w) += w->repeat;
1731 if (ev_at (w) < mn_now)
1732 ev_at (w) = mn_now;
1733
804 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1734 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
805 w->at = mn_now + w->repeat; 1735
1736 ANHE_at_cache (timers [HEAP0]);
806 downheap ((WT *)timers, timercnt, 0); 1737 downheap (timers, timercnt, HEAP0);
807 } 1738 }
808 else 1739 else
809 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1740 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
810 1741
1742 EV_FREQUENT_CHECK;
811 event (EV_A_ (W)w, EV_TIMEOUT); 1743 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
812 } 1744 }
813} 1745}
814 1746
815static void 1747#if EV_PERIODIC_ENABLE
1748void inline_size
816periodics_reify (EV_P) 1749periodics_reify (EV_P)
817{ 1750{
1751 EV_FREQUENT_CHECK;
1752
818 while (periodiccnt && periodics [0]->at <= rt_now) 1753 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
819 { 1754 {
820 struct ev_periodic *w = periodics [0]; 1755 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
821 1756
822 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1757 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
823 1758
824 /* first reschedule or stop timer */ 1759 /* first reschedule or stop timer */
825 if (w->interval) 1760 if (w->reschedule_cb)
826 { 1761 {
827 w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval; 1762 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
828 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now)); 1763
1764 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1765
1766 ANHE_at_cache (periodics [HEAP0]);
829 downheap ((WT *)periodics, periodiccnt, 0); 1767 downheap (periodics, periodiccnt, HEAP0);
1768 }
1769 else if (w->interval)
1770 {
1771 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1772 /* if next trigger time is not sufficiently in the future, put it there */
1773 /* this might happen because of floating point inexactness */
1774 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1775 {
1776 ev_at (w) += w->interval;
1777
1778 /* if interval is unreasonably low we might still have a time in the past */
1779 /* so correct this. this will make the periodic very inexact, but the user */
1780 /* has effectively asked to get triggered more often than possible */
1781 if (ev_at (w) < ev_rt_now)
1782 ev_at (w) = ev_rt_now;
1783 }
1784
1785 ANHE_at_cache (periodics [HEAP0]);
1786 downheap (periodics, periodiccnt, HEAP0);
830 } 1787 }
831 else 1788 else
832 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1789 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
833 1790
1791 EV_FREQUENT_CHECK;
834 event (EV_A_ (W)w, EV_PERIODIC); 1792 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
835 } 1793 }
836} 1794}
837 1795
838static void 1796static void noinline
839periodics_reschedule (EV_P) 1797periodics_reschedule (EV_P)
840{ 1798{
841 int i; 1799 int i;
842 1800
843 /* adjust periodics after time jump */ 1801 /* adjust periodics after time jump */
844 for (i = 0; i < periodiccnt; ++i) 1802 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
845 { 1803 {
846 struct ev_periodic *w = periodics [i]; 1804 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
847 1805
1806 if (w->reschedule_cb)
1807 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
848 if (w->interval) 1808 else if (w->interval)
1809 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1810
1811 ANHE_at_cache (periodics [i]);
1812 }
1813
1814 reheap (periodics, periodiccnt);
1815}
1816#endif
1817
1818void inline_speed
1819time_update (EV_P_ ev_tstamp max_block)
1820{
1821 int i;
1822
1823#if EV_USE_MONOTONIC
1824 if (expect_true (have_monotonic))
1825 {
1826 ev_tstamp odiff = rtmn_diff;
1827
1828 mn_now = get_clock ();
1829
1830 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1831 /* interpolate in the meantime */
1832 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
849 { 1833 {
850 ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval; 1834 ev_rt_now = rtmn_diff + mn_now;
1835 return;
1836 }
851 1837
852 if (fabs (diff) >= 1e-4) 1838 now_floor = mn_now;
1839 ev_rt_now = ev_time ();
1840
1841 /* loop a few times, before making important decisions.
1842 * on the choice of "4": one iteration isn't enough,
1843 * in case we get preempted during the calls to
1844 * ev_time and get_clock. a second call is almost guaranteed
1845 * to succeed in that case, though. and looping a few more times
1846 * doesn't hurt either as we only do this on time-jumps or
1847 * in the unlikely event of having been preempted here.
1848 */
1849 for (i = 4; --i; )
1850 {
1851 rtmn_diff = ev_rt_now - mn_now;
1852
1853 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1854 return; /* all is well */
1855
1856 ev_rt_now = ev_time ();
1857 mn_now = get_clock ();
1858 now_floor = mn_now;
1859 }
1860
1861# if EV_PERIODIC_ENABLE
1862 periodics_reschedule (EV_A);
1863# endif
1864 /* no timer adjustment, as the monotonic clock doesn't jump */
1865 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1866 }
1867 else
1868#endif
1869 {
1870 ev_rt_now = ev_time ();
1871
1872 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1873 {
1874#if EV_PERIODIC_ENABLE
1875 periodics_reschedule (EV_A);
1876#endif
1877 /* adjust timers. this is easy, as the offset is the same for all of them */
1878 for (i = 0; i < timercnt; ++i)
853 { 1879 {
854 ev_periodic_stop (EV_A_ w); 1880 ANHE *he = timers + i + HEAP0;
855 ev_periodic_start (EV_A_ w); 1881 ANHE_w (*he)->at += ev_rt_now - mn_now;
856 1882 ANHE_at_cache (*he);
857 i = 0; /* restart loop, inefficient, but time jumps should be rare */
858 } 1883 }
859 } 1884 }
860 }
861}
862 1885
863inline int
864time_update_monotonic (EV_P)
865{
866 mn_now = get_clock ();
867
868 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
869 {
870 rt_now = rtmn_diff + mn_now;
871 return 0;
872 }
873 else
874 {
875 now_floor = mn_now;
876 rt_now = ev_time ();
877 return 1;
878 }
879}
880
881static void
882time_update (EV_P)
883{
884 int i;
885
886#if EV_USE_MONOTONIC
887 if (expect_true (have_monotonic))
888 {
889 if (time_update_monotonic (EV_A))
890 {
891 ev_tstamp odiff = rtmn_diff;
892
893 for (i = 4; --i; ) /* loop a few times, before making important decisions */
894 {
895 rtmn_diff = rt_now - mn_now;
896
897 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
898 return; /* all is well */
899
900 rt_now = ev_time ();
901 mn_now = get_clock ();
902 now_floor = mn_now;
903 }
904
905 periodics_reschedule (EV_A);
906 /* no timer adjustment, as the monotonic clock doesn't jump */
907 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
908 }
909 }
910 else
911#endif
912 {
913 rt_now = ev_time ();
914
915 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
916 {
917 periodics_reschedule (EV_A);
918
919 /* adjust timers. this is easy, as the offset is the same for all */
920 for (i = 0; i < timercnt; ++i)
921 timers [i]->at += rt_now - mn_now;
922 }
923
924 mn_now = rt_now; 1886 mn_now = ev_rt_now;
925 } 1887 }
926} 1888}
927 1889
928void 1890void
929ev_ref (EV_P) 1891ev_ref (EV_P)
… …
935ev_unref (EV_P) 1897ev_unref (EV_P)
936{ 1898{
937 --activecnt; 1899 --activecnt;
938} 1900}
939 1901
1902void
1903ev_now_update (EV_P)
1904{
1905 time_update (EV_A_ 1e100);
1906}
1907
940static int loop_done; 1908static int loop_done;
941 1909
942void 1910void
943ev_loop (EV_P_ int flags) 1911ev_loop (EV_P_ int flags)
944{ 1912{
945 double block; 1913 loop_done = EVUNLOOP_CANCEL;
946 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1914
1915 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
947 1916
948 do 1917 do
949 { 1918 {
1919#if EV_VERIFY >= 2
1920 ev_loop_verify (EV_A);
1921#endif
1922
1923#ifndef _WIN32
1924 if (expect_false (curpid)) /* penalise the forking check even more */
1925 if (expect_false (getpid () != curpid))
1926 {
1927 curpid = getpid ();
1928 postfork = 1;
1929 }
1930#endif
1931
1932#if EV_FORK_ENABLE
1933 /* we might have forked, so queue fork handlers */
1934 if (expect_false (postfork))
1935 if (forkcnt)
1936 {
1937 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1938 call_pending (EV_A);
1939 }
1940#endif
1941
950 /* queue check watchers (and execute them) */ 1942 /* queue prepare watchers (and execute them) */
951 if (expect_false (preparecnt)) 1943 if (expect_false (preparecnt))
952 { 1944 {
953 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1945 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
954 call_pending (EV_A); 1946 call_pending (EV_A);
955 } 1947 }
956 1948
1949 if (expect_false (!activecnt))
1950 break;
1951
1952 /* we might have forked, so reify kernel state if necessary */
1953 if (expect_false (postfork))
1954 loop_fork (EV_A);
1955
957 /* update fd-related kernel structures */ 1956 /* update fd-related kernel structures */
958 fd_reify (EV_A); 1957 fd_reify (EV_A);
959 1958
960 /* calculate blocking time */ 1959 /* calculate blocking time */
1960 {
1961 ev_tstamp waittime = 0.;
1962 ev_tstamp sleeptime = 0.;
961 1963
962 /* we only need this for !monotonic clockor timers, but as we basically 1964 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
963 always have timers, we just calculate it always */
964#if EV_USE_MONOTONIC
965 if (expect_true (have_monotonic))
966 time_update_monotonic (EV_A);
967 else
968#endif
969 { 1965 {
970 rt_now = ev_time (); 1966 /* update time to cancel out callback processing overhead */
971 mn_now = rt_now; 1967 time_update (EV_A_ 1e100);
972 }
973 1968
974 if (flags & EVLOOP_NONBLOCK || idlecnt)
975 block = 0.;
976 else
977 {
978 block = MAX_BLOCKTIME; 1969 waittime = MAX_BLOCKTIME;
979 1970
980 if (timercnt) 1971 if (timercnt)
981 { 1972 {
982 ev_tstamp to = timers [0]->at - mn_now + method_fudge; 1973 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
983 if (block > to) block = to; 1974 if (waittime > to) waittime = to;
984 } 1975 }
985 1976
1977#if EV_PERIODIC_ENABLE
986 if (periodiccnt) 1978 if (periodiccnt)
987 { 1979 {
988 ev_tstamp to = periodics [0]->at - rt_now + method_fudge; 1980 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
989 if (block > to) block = to; 1981 if (waittime > to) waittime = to;
990 } 1982 }
1983#endif
991 1984
992 if (block < 0.) block = 0.; 1985 if (expect_false (waittime < timeout_blocktime))
1986 waittime = timeout_blocktime;
1987
1988 sleeptime = waittime - backend_fudge;
1989
1990 if (expect_true (sleeptime > io_blocktime))
1991 sleeptime = io_blocktime;
1992
1993 if (sleeptime)
1994 {
1995 ev_sleep (sleeptime);
1996 waittime -= sleeptime;
1997 }
993 } 1998 }
994 1999
995 method_poll (EV_A_ block); 2000 ++loop_count;
2001 backend_poll (EV_A_ waittime);
996 2002
997 /* update rt_now, do magic */ 2003 /* update ev_rt_now, do magic */
998 time_update (EV_A); 2004 time_update (EV_A_ waittime + sleeptime);
2005 }
999 2006
1000 /* queue pending timers and reschedule them */ 2007 /* queue pending timers and reschedule them */
1001 timers_reify (EV_A); /* relative timers called last */ 2008 timers_reify (EV_A); /* relative timers called last */
2009#if EV_PERIODIC_ENABLE
1002 periodics_reify (EV_A); /* absolute timers called first */ 2010 periodics_reify (EV_A); /* absolute timers called first */
2011#endif
1003 2012
2013#if EV_IDLE_ENABLE
1004 /* queue idle watchers unless io or timers are pending */ 2014 /* queue idle watchers unless other events are pending */
1005 if (!pendingcnt) 2015 idle_reify (EV_A);
1006 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2016#endif
1007 2017
1008 /* queue check watchers, to be executed first */ 2018 /* queue check watchers, to be executed first */
1009 if (checkcnt) 2019 if (expect_false (checkcnt))
1010 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2020 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1011 2021
1012 call_pending (EV_A); 2022 call_pending (EV_A);
1013 } 2023 }
1014 while (activecnt && !loop_done); 2024 while (expect_true (
2025 activecnt
2026 && !loop_done
2027 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2028 ));
1015 2029
1016 if (loop_done != 2) 2030 if (loop_done == EVUNLOOP_ONE)
1017 loop_done = 0; 2031 loop_done = EVUNLOOP_CANCEL;
1018} 2032}
1019 2033
1020void 2034void
1021ev_unloop (EV_P_ int how) 2035ev_unloop (EV_P_ int how)
1022{ 2036{
1023 loop_done = how; 2037 loop_done = how;
1024} 2038}
1025 2039
1026/*****************************************************************************/ 2040/*****************************************************************************/
1027 2041
1028inline void 2042void inline_size
1029wlist_add (WL *head, WL elem) 2043wlist_add (WL *head, WL elem)
1030{ 2044{
1031 elem->next = *head; 2045 elem->next = *head;
1032 *head = elem; 2046 *head = elem;
1033} 2047}
1034 2048
1035inline void 2049void inline_size
1036wlist_del (WL *head, WL elem) 2050wlist_del (WL *head, WL elem)
1037{ 2051{
1038 while (*head) 2052 while (*head)
1039 { 2053 {
1040 if (*head == elem) 2054 if (*head == elem)
… …
1045 2059
1046 head = &(*head)->next; 2060 head = &(*head)->next;
1047 } 2061 }
1048} 2062}
1049 2063
1050inline void 2064void inline_speed
1051ev_clear_pending (EV_P_ W w) 2065clear_pending (EV_P_ W w)
1052{ 2066{
1053 if (w->pending) 2067 if (w->pending)
1054 { 2068 {
1055 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2069 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1056 w->pending = 0; 2070 w->pending = 0;
1057 } 2071 }
1058} 2072}
1059 2073
1060inline void 2074int
2075ev_clear_pending (EV_P_ void *w)
2076{
2077 W w_ = (W)w;
2078 int pending = w_->pending;
2079
2080 if (expect_true (pending))
2081 {
2082 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2083 w_->pending = 0;
2084 p->w = 0;
2085 return p->events;
2086 }
2087 else
2088 return 0;
2089}
2090
2091void inline_size
2092pri_adjust (EV_P_ W w)
2093{
2094 int pri = w->priority;
2095 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2096 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2097 w->priority = pri;
2098}
2099
2100void inline_speed
1061ev_start (EV_P_ W w, int active) 2101ev_start (EV_P_ W w, int active)
1062{ 2102{
1063 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2103 pri_adjust (EV_A_ w);
1064 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1065
1066 w->active = active; 2104 w->active = active;
1067 ev_ref (EV_A); 2105 ev_ref (EV_A);
1068} 2106}
1069 2107
1070inline void 2108void inline_size
1071ev_stop (EV_P_ W w) 2109ev_stop (EV_P_ W w)
1072{ 2110{
1073 ev_unref (EV_A); 2111 ev_unref (EV_A);
1074 w->active = 0; 2112 w->active = 0;
1075} 2113}
1076 2114
1077/*****************************************************************************/ 2115/*****************************************************************************/
1078 2116
1079void 2117void noinline
1080ev_io_start (EV_P_ struct ev_io *w) 2118ev_io_start (EV_P_ ev_io *w)
1081{ 2119{
1082 int fd = w->fd; 2120 int fd = w->fd;
1083 2121
1084 if (ev_is_active (w)) 2122 if (expect_false (ev_is_active (w)))
1085 return; 2123 return;
1086 2124
1087 assert (("ev_io_start called with negative fd", fd >= 0)); 2125 assert (("ev_io_start called with negative fd", fd >= 0));
2126 assert (("ev_io start called with illegal event mask", !(w->events & ~(EV_IOFDSET | EV_READ | EV_WRITE))));
2127
2128 EV_FREQUENT_CHECK;
1088 2129
1089 ev_start (EV_A_ (W)w, 1); 2130 ev_start (EV_A_ (W)w, 1);
1090 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 2131 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1091 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2132 wlist_add (&anfds[fd].head, (WL)w);
1092 2133
1093 fd_change (EV_A_ fd); 2134 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1094} 2135 w->events &= ~EV_IOFDSET;
1095 2136
1096void 2137 EV_FREQUENT_CHECK;
2138}
2139
2140void noinline
1097ev_io_stop (EV_P_ struct ev_io *w) 2141ev_io_stop (EV_P_ ev_io *w)
1098{ 2142{
1099 ev_clear_pending (EV_A_ (W)w); 2143 clear_pending (EV_A_ (W)w);
1100 if (!ev_is_active (w)) 2144 if (expect_false (!ev_is_active (w)))
1101 return; 2145 return;
1102 2146
2147 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2148
2149 EV_FREQUENT_CHECK;
2150
1103 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2151 wlist_del (&anfds[w->fd].head, (WL)w);
1104 ev_stop (EV_A_ (W)w); 2152 ev_stop (EV_A_ (W)w);
1105 2153
1106 fd_change (EV_A_ w->fd); 2154 fd_change (EV_A_ w->fd, 1);
1107}
1108 2155
1109void 2156 EV_FREQUENT_CHECK;
2157}
2158
2159void noinline
1110ev_timer_start (EV_P_ struct ev_timer *w) 2160ev_timer_start (EV_P_ ev_timer *w)
1111{ 2161{
1112 if (ev_is_active (w)) 2162 if (expect_false (ev_is_active (w)))
1113 return; 2163 return;
1114 2164
1115 w->at += mn_now; 2165 ev_at (w) += mn_now;
1116 2166
1117 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2167 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1118 2168
2169 EV_FREQUENT_CHECK;
2170
2171 ++timercnt;
1119 ev_start (EV_A_ (W)w, ++timercnt); 2172 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1120 array_needsize (timers, timermax, timercnt, ); 2173 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1121 timers [timercnt - 1] = w; 2174 ANHE_w (timers [ev_active (w)]) = (WT)w;
1122 upheap ((WT *)timers, timercnt - 1); 2175 ANHE_at_cache (timers [ev_active (w)]);
1123} 2176 upheap (timers, ev_active (w));
1124 2177
1125void 2178 EV_FREQUENT_CHECK;
2179
2180 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2181}
2182
2183void noinline
1126ev_timer_stop (EV_P_ struct ev_timer *w) 2184ev_timer_stop (EV_P_ ev_timer *w)
1127{ 2185{
1128 ev_clear_pending (EV_A_ (W)w); 2186 clear_pending (EV_A_ (W)w);
1129 if (!ev_is_active (w)) 2187 if (expect_false (!ev_is_active (w)))
1130 return; 2188 return;
1131 2189
1132 if (w->active < timercnt--) 2190 EV_FREQUENT_CHECK;
2191
2192 {
2193 int active = ev_active (w);
2194
2195 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2196
2197 --timercnt;
2198
2199 if (expect_true (active < timercnt + HEAP0))
1133 { 2200 {
1134 timers [w->active - 1] = timers [timercnt]; 2201 timers [active] = timers [timercnt + HEAP0];
1135 downheap ((WT *)timers, timercnt, w->active - 1); 2202 adjustheap (timers, timercnt, active);
1136 } 2203 }
2204 }
1137 2205
1138 w->at = w->repeat; 2206 EV_FREQUENT_CHECK;
2207
2208 ev_at (w) -= mn_now;
1139 2209
1140 ev_stop (EV_A_ (W)w); 2210 ev_stop (EV_A_ (W)w);
1141} 2211}
1142 2212
1143void 2213void noinline
1144ev_timer_again (EV_P_ struct ev_timer *w) 2214ev_timer_again (EV_P_ ev_timer *w)
1145{ 2215{
2216 EV_FREQUENT_CHECK;
2217
1146 if (ev_is_active (w)) 2218 if (ev_is_active (w))
1147 { 2219 {
1148 if (w->repeat) 2220 if (w->repeat)
1149 { 2221 {
1150 w->at = mn_now + w->repeat; 2222 ev_at (w) = mn_now + w->repeat;
2223 ANHE_at_cache (timers [ev_active (w)]);
1151 downheap ((WT *)timers, timercnt, w->active - 1); 2224 adjustheap (timers, timercnt, ev_active (w));
1152 } 2225 }
1153 else 2226 else
1154 ev_timer_stop (EV_A_ w); 2227 ev_timer_stop (EV_A_ w);
1155 } 2228 }
1156 else if (w->repeat) 2229 else if (w->repeat)
2230 {
2231 ev_at (w) = w->repeat;
1157 ev_timer_start (EV_A_ w); 2232 ev_timer_start (EV_A_ w);
1158} 2233 }
1159 2234
1160void 2235 EV_FREQUENT_CHECK;
2236}
2237
2238#if EV_PERIODIC_ENABLE
2239void noinline
1161ev_periodic_start (EV_P_ struct ev_periodic *w) 2240ev_periodic_start (EV_P_ ev_periodic *w)
1162{ 2241{
1163 if (ev_is_active (w)) 2242 if (expect_false (ev_is_active (w)))
1164 return; 2243 return;
1165 2244
2245 if (w->reschedule_cb)
2246 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2247 else if (w->interval)
2248 {
1166 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2249 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1167
1168 /* this formula differs from the one in periodic_reify because we do not always round up */ 2250 /* this formula differs from the one in periodic_reify because we do not always round up */
1169 if (w->interval)
1170 w->at += ceil ((rt_now - w->at) / w->interval) * w->interval; 2251 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2252 }
2253 else
2254 ev_at (w) = w->offset;
1171 2255
2256 EV_FREQUENT_CHECK;
2257
2258 ++periodiccnt;
1172 ev_start (EV_A_ (W)w, ++periodiccnt); 2259 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1173 array_needsize (periodics, periodicmax, periodiccnt, ); 2260 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1174 periodics [periodiccnt - 1] = w; 2261 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1175 upheap ((WT *)periodics, periodiccnt - 1); 2262 ANHE_at_cache (periodics [ev_active (w)]);
1176} 2263 upheap (periodics, ev_active (w));
1177 2264
1178void 2265 EV_FREQUENT_CHECK;
2266
2267 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2268}
2269
2270void noinline
1179ev_periodic_stop (EV_P_ struct ev_periodic *w) 2271ev_periodic_stop (EV_P_ ev_periodic *w)
1180{ 2272{
1181 ev_clear_pending (EV_A_ (W)w); 2273 clear_pending (EV_A_ (W)w);
1182 if (!ev_is_active (w)) 2274 if (expect_false (!ev_is_active (w)))
1183 return; 2275 return;
1184 2276
1185 if (w->active < periodiccnt--) 2277 EV_FREQUENT_CHECK;
2278
2279 {
2280 int active = ev_active (w);
2281
2282 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2283
2284 --periodiccnt;
2285
2286 if (expect_true (active < periodiccnt + HEAP0))
1186 { 2287 {
1187 periodics [w->active - 1] = periodics [periodiccnt]; 2288 periodics [active] = periodics [periodiccnt + HEAP0];
1188 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2289 adjustheap (periodics, periodiccnt, active);
1189 } 2290 }
2291 }
2292
2293 EV_FREQUENT_CHECK;
1190 2294
1191 ev_stop (EV_A_ (W)w); 2295 ev_stop (EV_A_ (W)w);
1192} 2296}
1193 2297
1194void 2298void noinline
1195ev_idle_start (EV_P_ struct ev_idle *w) 2299ev_periodic_again (EV_P_ ev_periodic *w)
1196{ 2300{
1197 if (ev_is_active (w)) 2301 /* TODO: use adjustheap and recalculation */
1198 return;
1199
1200 ev_start (EV_A_ (W)w, ++idlecnt);
1201 array_needsize (idles, idlemax, idlecnt, );
1202 idles [idlecnt - 1] = w;
1203}
1204
1205void
1206ev_idle_stop (EV_P_ struct ev_idle *w)
1207{
1208 ev_clear_pending (EV_A_ (W)w);
1209 if (ev_is_active (w))
1210 return;
1211
1212 idles [w->active - 1] = idles [--idlecnt];
1213 ev_stop (EV_A_ (W)w); 2302 ev_periodic_stop (EV_A_ w);
2303 ev_periodic_start (EV_A_ w);
1214} 2304}
1215 2305#endif
1216void
1217ev_prepare_start (EV_P_ struct ev_prepare *w)
1218{
1219 if (ev_is_active (w))
1220 return;
1221
1222 ev_start (EV_A_ (W)w, ++preparecnt);
1223 array_needsize (prepares, preparemax, preparecnt, );
1224 prepares [preparecnt - 1] = w;
1225}
1226
1227void
1228ev_prepare_stop (EV_P_ struct ev_prepare *w)
1229{
1230 ev_clear_pending (EV_A_ (W)w);
1231 if (ev_is_active (w))
1232 return;
1233
1234 prepares [w->active - 1] = prepares [--preparecnt];
1235 ev_stop (EV_A_ (W)w);
1236}
1237
1238void
1239ev_check_start (EV_P_ struct ev_check *w)
1240{
1241 if (ev_is_active (w))
1242 return;
1243
1244 ev_start (EV_A_ (W)w, ++checkcnt);
1245 array_needsize (checks, checkmax, checkcnt, );
1246 checks [checkcnt - 1] = w;
1247}
1248
1249void
1250ev_check_stop (EV_P_ struct ev_check *w)
1251{
1252 ev_clear_pending (EV_A_ (W)w);
1253 if (ev_is_active (w))
1254 return;
1255
1256 checks [w->active - 1] = checks [--checkcnt];
1257 ev_stop (EV_A_ (W)w);
1258}
1259 2306
1260#ifndef SA_RESTART 2307#ifndef SA_RESTART
1261# define SA_RESTART 0 2308# define SA_RESTART 0
1262#endif 2309#endif
1263 2310
1264void 2311void noinline
1265ev_signal_start (EV_P_ struct ev_signal *w) 2312ev_signal_start (EV_P_ ev_signal *w)
1266{ 2313{
1267#if EV_MULTIPLICITY 2314#if EV_MULTIPLICITY
1268 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2315 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1269#endif 2316#endif
1270 if (ev_is_active (w)) 2317 if (expect_false (ev_is_active (w)))
1271 return; 2318 return;
1272 2319
1273 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2320 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1274 2321
2322 evpipe_init (EV_A);
2323
2324 EV_FREQUENT_CHECK;
2325
2326 {
2327#ifndef _WIN32
2328 sigset_t full, prev;
2329 sigfillset (&full);
2330 sigprocmask (SIG_SETMASK, &full, &prev);
2331#endif
2332
2333 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2334
2335#ifndef _WIN32
2336 sigprocmask (SIG_SETMASK, &prev, 0);
2337#endif
2338 }
2339
1275 ev_start (EV_A_ (W)w, 1); 2340 ev_start (EV_A_ (W)w, 1);
1276 array_needsize (signals, signalmax, w->signum, signals_init);
1277 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2341 wlist_add (&signals [w->signum - 1].head, (WL)w);
1278 2342
1279 if (!w->next) 2343 if (!((WL)w)->next)
1280 { 2344 {
2345#if _WIN32
2346 signal (w->signum, ev_sighandler);
2347#else
1281 struct sigaction sa; 2348 struct sigaction sa;
1282 sa.sa_handler = sighandler; 2349 sa.sa_handler = ev_sighandler;
1283 sigfillset (&sa.sa_mask); 2350 sigfillset (&sa.sa_mask);
1284 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2351 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1285 sigaction (w->signum, &sa, 0); 2352 sigaction (w->signum, &sa, 0);
2353#endif
1286 } 2354 }
1287}
1288 2355
1289void 2356 EV_FREQUENT_CHECK;
2357}
2358
2359void noinline
1290ev_signal_stop (EV_P_ struct ev_signal *w) 2360ev_signal_stop (EV_P_ ev_signal *w)
1291{ 2361{
1292 ev_clear_pending (EV_A_ (W)w); 2362 clear_pending (EV_A_ (W)w);
1293 if (!ev_is_active (w)) 2363 if (expect_false (!ev_is_active (w)))
1294 return; 2364 return;
1295 2365
2366 EV_FREQUENT_CHECK;
2367
1296 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2368 wlist_del (&signals [w->signum - 1].head, (WL)w);
1297 ev_stop (EV_A_ (W)w); 2369 ev_stop (EV_A_ (W)w);
1298 2370
1299 if (!signals [w->signum - 1].head) 2371 if (!signals [w->signum - 1].head)
1300 signal (w->signum, SIG_DFL); 2372 signal (w->signum, SIG_DFL);
1301}
1302 2373
2374 EV_FREQUENT_CHECK;
2375}
2376
1303void 2377void
1304ev_child_start (EV_P_ struct ev_child *w) 2378ev_child_start (EV_P_ ev_child *w)
1305{ 2379{
1306#if EV_MULTIPLICITY 2380#if EV_MULTIPLICITY
1307 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2381 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1308#endif 2382#endif
1309 if (ev_is_active (w)) 2383 if (expect_false (ev_is_active (w)))
1310 return; 2384 return;
1311 2385
2386 EV_FREQUENT_CHECK;
2387
1312 ev_start (EV_A_ (W)w, 1); 2388 ev_start (EV_A_ (W)w, 1);
1313 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2389 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1314}
1315 2390
2391 EV_FREQUENT_CHECK;
2392}
2393
1316void 2394void
1317ev_child_stop (EV_P_ struct ev_child *w) 2395ev_child_stop (EV_P_ ev_child *w)
1318{ 2396{
1319 ev_clear_pending (EV_A_ (W)w); 2397 clear_pending (EV_A_ (W)w);
1320 if (ev_is_active (w)) 2398 if (expect_false (!ev_is_active (w)))
1321 return; 2399 return;
1322 2400
2401 EV_FREQUENT_CHECK;
2402
1323 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2403 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1324 ev_stop (EV_A_ (W)w); 2404 ev_stop (EV_A_ (W)w);
2405
2406 EV_FREQUENT_CHECK;
1325} 2407}
2408
2409#if EV_STAT_ENABLE
2410
2411# ifdef _WIN32
2412# undef lstat
2413# define lstat(a,b) _stati64 (a,b)
2414# endif
2415
2416#define DEF_STAT_INTERVAL 5.0074891
2417#define MIN_STAT_INTERVAL 0.1074891
2418
2419static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2420
2421#if EV_USE_INOTIFY
2422# define EV_INOTIFY_BUFSIZE 8192
2423
2424static void noinline
2425infy_add (EV_P_ ev_stat *w)
2426{
2427 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);
2428
2429 if (w->wd < 0)
2430 {
2431 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2432
2433 /* monitor some parent directory for speedup hints */
2434 /* note that exceeding the hardcoded limit is not a correctness issue, */
2435 /* but an efficiency issue only */
2436 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2437 {
2438 char path [4096];
2439 strcpy (path, w->path);
2440
2441 do
2442 {
2443 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2444 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2445
2446 char *pend = strrchr (path, '/');
2447
2448 if (!pend)
2449 break; /* whoops, no '/', complain to your admin */
2450
2451 *pend = 0;
2452 w->wd = inotify_add_watch (fs_fd, path, mask);
2453 }
2454 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2455 }
2456 }
2457 else
2458 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2459
2460 if (w->wd >= 0)
2461 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2462}
2463
2464static void noinline
2465infy_del (EV_P_ ev_stat *w)
2466{
2467 int slot;
2468 int wd = w->wd;
2469
2470 if (wd < 0)
2471 return;
2472
2473 w->wd = -2;
2474 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2475 wlist_del (&fs_hash [slot].head, (WL)w);
2476
2477 /* remove this watcher, if others are watching it, they will rearm */
2478 inotify_rm_watch (fs_fd, wd);
2479}
2480
2481static void noinline
2482infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2483{
2484 if (slot < 0)
2485 /* overflow, need to check for all hash slots */
2486 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2487 infy_wd (EV_A_ slot, wd, ev);
2488 else
2489 {
2490 WL w_;
2491
2492 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2493 {
2494 ev_stat *w = (ev_stat *)w_;
2495 w_ = w_->next; /* lets us remove this watcher and all before it */
2496
2497 if (w->wd == wd || wd == -1)
2498 {
2499 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2500 {
2501 w->wd = -1;
2502 infy_add (EV_A_ w); /* re-add, no matter what */
2503 }
2504
2505 stat_timer_cb (EV_A_ &w->timer, 0);
2506 }
2507 }
2508 }
2509}
2510
2511static void
2512infy_cb (EV_P_ ev_io *w, int revents)
2513{
2514 char buf [EV_INOTIFY_BUFSIZE];
2515 struct inotify_event *ev = (struct inotify_event *)buf;
2516 int ofs;
2517 int len = read (fs_fd, buf, sizeof (buf));
2518
2519 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2520 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2521}
2522
2523void inline_size
2524infy_init (EV_P)
2525{
2526 if (fs_fd != -2)
2527 return;
2528
2529 /* kernels < 2.6.25 are borked
2530 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2531 */
2532 {
2533 struct utsname buf;
2534 int major, minor, micro;
2535
2536 fs_fd = -1;
2537
2538 if (uname (&buf))
2539 return;
2540
2541 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2542 return;
2543
2544 if (major < 2
2545 || (major == 2 && minor < 6)
2546 || (major == 2 && minor == 6 && micro < 25))
2547 return;
2548 }
2549
2550 fs_fd = inotify_init ();
2551
2552 if (fs_fd >= 0)
2553 {
2554 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2555 ev_set_priority (&fs_w, EV_MAXPRI);
2556 ev_io_start (EV_A_ &fs_w);
2557 }
2558}
2559
2560void inline_size
2561infy_fork (EV_P)
2562{
2563 int slot;
2564
2565 if (fs_fd < 0)
2566 return;
2567
2568 close (fs_fd);
2569 fs_fd = inotify_init ();
2570
2571 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2572 {
2573 WL w_ = fs_hash [slot].head;
2574 fs_hash [slot].head = 0;
2575
2576 while (w_)
2577 {
2578 ev_stat *w = (ev_stat *)w_;
2579 w_ = w_->next; /* lets us add this watcher */
2580
2581 w->wd = -1;
2582
2583 if (fs_fd >= 0)
2584 infy_add (EV_A_ w); /* re-add, no matter what */
2585 else
2586 ev_timer_start (EV_A_ &w->timer);
2587 }
2588 }
2589}
2590
2591#endif
2592
2593#ifdef _WIN32
2594# define EV_LSTAT(p,b) _stati64 (p, b)
2595#else
2596# define EV_LSTAT(p,b) lstat (p, b)
2597#endif
2598
2599void
2600ev_stat_stat (EV_P_ ev_stat *w)
2601{
2602 if (lstat (w->path, &w->attr) < 0)
2603 w->attr.st_nlink = 0;
2604 else if (!w->attr.st_nlink)
2605 w->attr.st_nlink = 1;
2606}
2607
2608static void noinline
2609stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2610{
2611 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2612
2613 /* we copy this here each the time so that */
2614 /* prev has the old value when the callback gets invoked */
2615 w->prev = w->attr;
2616 ev_stat_stat (EV_A_ w);
2617
2618 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2619 if (
2620 w->prev.st_dev != w->attr.st_dev
2621 || w->prev.st_ino != w->attr.st_ino
2622 || w->prev.st_mode != w->attr.st_mode
2623 || w->prev.st_nlink != w->attr.st_nlink
2624 || w->prev.st_uid != w->attr.st_uid
2625 || w->prev.st_gid != w->attr.st_gid
2626 || w->prev.st_rdev != w->attr.st_rdev
2627 || w->prev.st_size != w->attr.st_size
2628 || w->prev.st_atime != w->attr.st_atime
2629 || w->prev.st_mtime != w->attr.st_mtime
2630 || w->prev.st_ctime != w->attr.st_ctime
2631 ) {
2632 #if EV_USE_INOTIFY
2633 if (fs_fd >= 0)
2634 {
2635 infy_del (EV_A_ w);
2636 infy_add (EV_A_ w);
2637 ev_stat_stat (EV_A_ w); /* avoid race... */
2638 }
2639 #endif
2640
2641 ev_feed_event (EV_A_ w, EV_STAT);
2642 }
2643}
2644
2645void
2646ev_stat_start (EV_P_ ev_stat *w)
2647{
2648 if (expect_false (ev_is_active (w)))
2649 return;
2650
2651 /* since we use memcmp, we need to clear any padding data etc. */
2652 memset (&w->prev, 0, sizeof (ev_statdata));
2653 memset (&w->attr, 0, sizeof (ev_statdata));
2654
2655 ev_stat_stat (EV_A_ w);
2656
2657 if (w->interval < MIN_STAT_INTERVAL)
2658 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2659
2660 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2661 ev_set_priority (&w->timer, ev_priority (w));
2662
2663#if EV_USE_INOTIFY
2664 infy_init (EV_A);
2665
2666 if (fs_fd >= 0)
2667 infy_add (EV_A_ w);
2668 else
2669#endif
2670 ev_timer_start (EV_A_ &w->timer);
2671
2672 ev_start (EV_A_ (W)w, 1);
2673
2674 EV_FREQUENT_CHECK;
2675}
2676
2677void
2678ev_stat_stop (EV_P_ ev_stat *w)
2679{
2680 clear_pending (EV_A_ (W)w);
2681 if (expect_false (!ev_is_active (w)))
2682 return;
2683
2684 EV_FREQUENT_CHECK;
2685
2686#if EV_USE_INOTIFY
2687 infy_del (EV_A_ w);
2688#endif
2689 ev_timer_stop (EV_A_ &w->timer);
2690
2691 ev_stop (EV_A_ (W)w);
2692
2693 EV_FREQUENT_CHECK;
2694}
2695#endif
2696
2697#if EV_IDLE_ENABLE
2698void
2699ev_idle_start (EV_P_ ev_idle *w)
2700{
2701 if (expect_false (ev_is_active (w)))
2702 return;
2703
2704 pri_adjust (EV_A_ (W)w);
2705
2706 EV_FREQUENT_CHECK;
2707
2708 {
2709 int active = ++idlecnt [ABSPRI (w)];
2710
2711 ++idleall;
2712 ev_start (EV_A_ (W)w, active);
2713
2714 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2715 idles [ABSPRI (w)][active - 1] = w;
2716 }
2717
2718 EV_FREQUENT_CHECK;
2719}
2720
2721void
2722ev_idle_stop (EV_P_ ev_idle *w)
2723{
2724 clear_pending (EV_A_ (W)w);
2725 if (expect_false (!ev_is_active (w)))
2726 return;
2727
2728 EV_FREQUENT_CHECK;
2729
2730 {
2731 int active = ev_active (w);
2732
2733 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2734 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2735
2736 ev_stop (EV_A_ (W)w);
2737 --idleall;
2738 }
2739
2740 EV_FREQUENT_CHECK;
2741}
2742#endif
2743
2744void
2745ev_prepare_start (EV_P_ ev_prepare *w)
2746{
2747 if (expect_false (ev_is_active (w)))
2748 return;
2749
2750 EV_FREQUENT_CHECK;
2751
2752 ev_start (EV_A_ (W)w, ++preparecnt);
2753 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2754 prepares [preparecnt - 1] = w;
2755
2756 EV_FREQUENT_CHECK;
2757}
2758
2759void
2760ev_prepare_stop (EV_P_ ev_prepare *w)
2761{
2762 clear_pending (EV_A_ (W)w);
2763 if (expect_false (!ev_is_active (w)))
2764 return;
2765
2766 EV_FREQUENT_CHECK;
2767
2768 {
2769 int active = ev_active (w);
2770
2771 prepares [active - 1] = prepares [--preparecnt];
2772 ev_active (prepares [active - 1]) = active;
2773 }
2774
2775 ev_stop (EV_A_ (W)w);
2776
2777 EV_FREQUENT_CHECK;
2778}
2779
2780void
2781ev_check_start (EV_P_ ev_check *w)
2782{
2783 if (expect_false (ev_is_active (w)))
2784 return;
2785
2786 EV_FREQUENT_CHECK;
2787
2788 ev_start (EV_A_ (W)w, ++checkcnt);
2789 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2790 checks [checkcnt - 1] = w;
2791
2792 EV_FREQUENT_CHECK;
2793}
2794
2795void
2796ev_check_stop (EV_P_ ev_check *w)
2797{
2798 clear_pending (EV_A_ (W)w);
2799 if (expect_false (!ev_is_active (w)))
2800 return;
2801
2802 EV_FREQUENT_CHECK;
2803
2804 {
2805 int active = ev_active (w);
2806
2807 checks [active - 1] = checks [--checkcnt];
2808 ev_active (checks [active - 1]) = active;
2809 }
2810
2811 ev_stop (EV_A_ (W)w);
2812
2813 EV_FREQUENT_CHECK;
2814}
2815
2816#if EV_EMBED_ENABLE
2817void noinline
2818ev_embed_sweep (EV_P_ ev_embed *w)
2819{
2820 ev_loop (w->other, EVLOOP_NONBLOCK);
2821}
2822
2823static void
2824embed_io_cb (EV_P_ ev_io *io, int revents)
2825{
2826 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2827
2828 if (ev_cb (w))
2829 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2830 else
2831 ev_loop (w->other, EVLOOP_NONBLOCK);
2832}
2833
2834static void
2835embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2836{
2837 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2838
2839 {
2840 struct ev_loop *loop = w->other;
2841
2842 while (fdchangecnt)
2843 {
2844 fd_reify (EV_A);
2845 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2846 }
2847 }
2848}
2849
2850static void
2851embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2852{
2853 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2854
2855 {
2856 struct ev_loop *loop = w->other;
2857
2858 ev_loop_fork (EV_A);
2859 }
2860}
2861
2862#if 0
2863static void
2864embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2865{
2866 ev_idle_stop (EV_A_ idle);
2867}
2868#endif
2869
2870void
2871ev_embed_start (EV_P_ ev_embed *w)
2872{
2873 if (expect_false (ev_is_active (w)))
2874 return;
2875
2876 {
2877 struct ev_loop *loop = w->other;
2878 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2879 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2880 }
2881
2882 EV_FREQUENT_CHECK;
2883
2884 ev_set_priority (&w->io, ev_priority (w));
2885 ev_io_start (EV_A_ &w->io);
2886
2887 ev_prepare_init (&w->prepare, embed_prepare_cb);
2888 ev_set_priority (&w->prepare, EV_MINPRI);
2889 ev_prepare_start (EV_A_ &w->prepare);
2890
2891 ev_fork_init (&w->fork, embed_fork_cb);
2892 ev_fork_start (EV_A_ &w->fork);
2893
2894 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2895
2896 ev_start (EV_A_ (W)w, 1);
2897
2898 EV_FREQUENT_CHECK;
2899}
2900
2901void
2902ev_embed_stop (EV_P_ ev_embed *w)
2903{
2904 clear_pending (EV_A_ (W)w);
2905 if (expect_false (!ev_is_active (w)))
2906 return;
2907
2908 EV_FREQUENT_CHECK;
2909
2910 ev_io_stop (EV_A_ &w->io);
2911 ev_prepare_stop (EV_A_ &w->prepare);
2912 ev_fork_stop (EV_A_ &w->fork);
2913
2914 EV_FREQUENT_CHECK;
2915}
2916#endif
2917
2918#if EV_FORK_ENABLE
2919void
2920ev_fork_start (EV_P_ ev_fork *w)
2921{
2922 if (expect_false (ev_is_active (w)))
2923 return;
2924
2925 EV_FREQUENT_CHECK;
2926
2927 ev_start (EV_A_ (W)w, ++forkcnt);
2928 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2929 forks [forkcnt - 1] = w;
2930
2931 EV_FREQUENT_CHECK;
2932}
2933
2934void
2935ev_fork_stop (EV_P_ ev_fork *w)
2936{
2937 clear_pending (EV_A_ (W)w);
2938 if (expect_false (!ev_is_active (w)))
2939 return;
2940
2941 EV_FREQUENT_CHECK;
2942
2943 {
2944 int active = ev_active (w);
2945
2946 forks [active - 1] = forks [--forkcnt];
2947 ev_active (forks [active - 1]) = active;
2948 }
2949
2950 ev_stop (EV_A_ (W)w);
2951
2952 EV_FREQUENT_CHECK;
2953}
2954#endif
2955
2956#if EV_ASYNC_ENABLE
2957void
2958ev_async_start (EV_P_ ev_async *w)
2959{
2960 if (expect_false (ev_is_active (w)))
2961 return;
2962
2963 evpipe_init (EV_A);
2964
2965 EV_FREQUENT_CHECK;
2966
2967 ev_start (EV_A_ (W)w, ++asynccnt);
2968 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2969 asyncs [asynccnt - 1] = w;
2970
2971 EV_FREQUENT_CHECK;
2972}
2973
2974void
2975ev_async_stop (EV_P_ ev_async *w)
2976{
2977 clear_pending (EV_A_ (W)w);
2978 if (expect_false (!ev_is_active (w)))
2979 return;
2980
2981 EV_FREQUENT_CHECK;
2982
2983 {
2984 int active = ev_active (w);
2985
2986 asyncs [active - 1] = asyncs [--asynccnt];
2987 ev_active (asyncs [active - 1]) = active;
2988 }
2989
2990 ev_stop (EV_A_ (W)w);
2991
2992 EV_FREQUENT_CHECK;
2993}
2994
2995void
2996ev_async_send (EV_P_ ev_async *w)
2997{
2998 w->sent = 1;
2999 evpipe_write (EV_A_ &gotasync);
3000}
3001#endif
1326 3002
1327/*****************************************************************************/ 3003/*****************************************************************************/
1328 3004
1329struct ev_once 3005struct ev_once
1330{ 3006{
1331 struct ev_io io; 3007 ev_io io;
1332 struct ev_timer to; 3008 ev_timer to;
1333 void (*cb)(int revents, void *arg); 3009 void (*cb)(int revents, void *arg);
1334 void *arg; 3010 void *arg;
1335}; 3011};
1336 3012
1337static void 3013static void
1338once_cb (EV_P_ struct ev_once *once, int revents) 3014once_cb (EV_P_ struct ev_once *once, int revents)
1339{ 3015{
1340 void (*cb)(int revents, void *arg) = once->cb; 3016 void (*cb)(int revents, void *arg) = once->cb;
1341 void *arg = once->arg; 3017 void *arg = once->arg;
1342 3018
1343 ev_io_stop (EV_A_ &once->io); 3019 ev_io_stop (EV_A_ &once->io);
1344 ev_timer_stop (EV_A_ &once->to); 3020 ev_timer_stop (EV_A_ &once->to);
1345 free (once); 3021 ev_free (once);
1346 3022
1347 cb (revents, arg); 3023 cb (revents, arg);
1348} 3024}
1349 3025
1350static void 3026static void
1351once_cb_io (EV_P_ struct ev_io *w, int revents) 3027once_cb_io (EV_P_ ev_io *w, int revents)
1352{ 3028{
1353 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3029 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3030
3031 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1354} 3032}
1355 3033
1356static void 3034static void
1357once_cb_to (EV_P_ struct ev_timer *w, int revents) 3035once_cb_to (EV_P_ ev_timer *w, int revents)
1358{ 3036{
1359 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3037 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3038
3039 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1360} 3040}
1361 3041
1362void 3042void
1363ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3043ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1364{ 3044{
1365 struct ev_once *once = malloc (sizeof (struct ev_once)); 3045 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1366 3046
1367 if (!once) 3047 if (expect_false (!once))
3048 {
1368 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3049 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1369 else 3050 return;
1370 { 3051 }
3052
1371 once->cb = cb; 3053 once->cb = cb;
1372 once->arg = arg; 3054 once->arg = arg;
1373 3055
1374 ev_watcher_init (&once->io, once_cb_io); 3056 ev_init (&once->io, once_cb_io);
1375 if (fd >= 0) 3057 if (fd >= 0)
1376 { 3058 {
1377 ev_io_set (&once->io, fd, events); 3059 ev_io_set (&once->io, fd, events);
1378 ev_io_start (EV_A_ &once->io); 3060 ev_io_start (EV_A_ &once->io);
1379 } 3061 }
1380 3062
1381 ev_watcher_init (&once->to, once_cb_to); 3063 ev_init (&once->to, once_cb_to);
1382 if (timeout >= 0.) 3064 if (timeout >= 0.)
1383 { 3065 {
1384 ev_timer_set (&once->to, timeout, 0.); 3066 ev_timer_set (&once->to, timeout, 0.);
1385 ev_timer_start (EV_A_ &once->to); 3067 ev_timer_start (EV_A_ &once->to);
1386 }
1387 } 3068 }
1388} 3069}
1389 3070
3071#if EV_MULTIPLICITY
3072 #include "ev_wrap.h"
3073#endif
3074
3075#ifdef __cplusplus
3076}
3077#endif
3078

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