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Comparing libev/ev.c (file contents):
Revision 1.29 by root, Thu Nov 1 08:10:03 2007 UTC vs.
Revision 1.212 by root, Tue Feb 19 19:01:13 2008 UTC

1/* 1/*
2 * libev event processing core, watcher management
3 *
2 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
3 * All rights reserved. 5 * All rights reserved.
4 * 6 *
5 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
6 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
7 * 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.
8 * 27 *
9 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
10 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
11 * 30 * in which case the provisions of the GPL are applicable instead of
12 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
13 * 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
14 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
15 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
16 * 35 * and other provisions required by the GPL. If you do not delete the
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */ 38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44#ifndef EV_STANDALONE
29#if EV_USE_CONFIG_H 45# ifdef EV_CONFIG_H
46# include EV_CONFIG_H
47# else
30# include "config.h" 48# include "config.h"
49# endif
50
51# if HAVE_CLOCK_GETTIME
52# ifndef EV_USE_MONOTONIC
53# define EV_USE_MONOTONIC 1
54# endif
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 1
57# endif
58# else
59# ifndef EV_USE_MONOTONIC
60# define EV_USE_MONOTONIC 0
61# endif
62# ifndef EV_USE_REALTIME
63# define EV_USE_REALTIME 0
64# endif
65# endif
66
67# ifndef EV_USE_NANOSLEEP
68# if HAVE_NANOSLEEP
69# define EV_USE_NANOSLEEP 1
70# else
71# define EV_USE_NANOSLEEP 0
72# endif
73# endif
74
75# ifndef EV_USE_SELECT
76# if HAVE_SELECT && HAVE_SYS_SELECT_H
77# define EV_USE_SELECT 1
78# else
79# define EV_USE_SELECT 0
80# endif
81# endif
82
83# ifndef EV_USE_POLL
84# if HAVE_POLL && HAVE_POLL_H
85# define EV_USE_POLL 1
86# else
87# define EV_USE_POLL 0
88# endif
89# endif
90
91# ifndef EV_USE_EPOLL
92# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
93# define EV_USE_EPOLL 1
94# else
95# define EV_USE_EPOLL 0
96# endif
97# endif
98
99# ifndef EV_USE_KQUEUE
100# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
101# define EV_USE_KQUEUE 1
102# else
103# define EV_USE_KQUEUE 0
104# endif
105# endif
106
107# ifndef EV_USE_PORT
108# if HAVE_PORT_H && HAVE_PORT_CREATE
109# define EV_USE_PORT 1
110# else
111# define EV_USE_PORT 0
112# endif
113# endif
114
115# ifndef EV_USE_INOTIFY
116# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
117# define EV_USE_INOTIFY 1
118# else
119# define EV_USE_INOTIFY 0
120# endif
121# endif
122
31#endif 123#endif
32 124
33#include <math.h> 125#include <math.h>
34#include <stdlib.h> 126#include <stdlib.h>
35#include <unistd.h>
36#include <fcntl.h> 127#include <fcntl.h>
37#include <signal.h>
38#include <stddef.h> 128#include <stddef.h>
39 129
40#include <stdio.h> 130#include <stdio.h>
41 131
42#include <assert.h> 132#include <assert.h>
43#include <errno.h> 133#include <errno.h>
44#include <sys/types.h> 134#include <sys/types.h>
45#include <sys/wait.h>
46#include <sys/time.h>
47#include <time.h> 135#include <time.h>
48 136
137#include <signal.h>
138
139#ifdef EV_H
140# include EV_H
141#else
142# include "ev.h"
143#endif
144
145#ifndef _WIN32
146# include <sys/time.h>
147# include <sys/wait.h>
148# include <unistd.h>
149#else
150# define WIN32_LEAN_AND_MEAN
151# include <windows.h>
152# ifndef EV_SELECT_IS_WINSOCKET
153# define EV_SELECT_IS_WINSOCKET 1
154# endif
155#endif
156
157/**/
158
49#ifndef EV_USE_MONOTONIC 159#ifndef EV_USE_MONOTONIC
50# ifdef CLOCK_MONOTONIC
51# define EV_USE_MONOTONIC 1 160# define EV_USE_MONOTONIC 0
52# endif 161#endif
162
163#ifndef EV_USE_REALTIME
164# define EV_USE_REALTIME 0
165#endif
166
167#ifndef EV_USE_NANOSLEEP
168# define EV_USE_NANOSLEEP 0
53#endif 169#endif
54 170
55#ifndef EV_USE_SELECT 171#ifndef EV_USE_SELECT
56# define EV_USE_SELECT 1 172# define EV_USE_SELECT 1
57#endif 173#endif
58 174
175#ifndef EV_USE_POLL
176# ifdef _WIN32
177# define EV_USE_POLL 0
178# else
179# define EV_USE_POLL 1
180# endif
181#endif
182
59#ifndef EV_USE_EPOLL 183#ifndef EV_USE_EPOLL
60# define EV_USE_EPOLL 0 184# define EV_USE_EPOLL 0
61#endif 185#endif
62 186
187#ifndef EV_USE_KQUEUE
188# define EV_USE_KQUEUE 0
189#endif
190
63#ifndef EV_USE_REALTIME 191#ifndef EV_USE_PORT
64# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */ 192# define EV_USE_PORT 0
193#endif
194
195#ifndef EV_USE_INOTIFY
196# define EV_USE_INOTIFY 0
197#endif
198
199#ifndef EV_PID_HASHSIZE
200# if EV_MINIMAL
201# define EV_PID_HASHSIZE 1
202# else
203# define EV_PID_HASHSIZE 16
65#endif 204# endif
205#endif
206
207#ifndef EV_INOTIFY_HASHSIZE
208# if EV_MINIMAL
209# define EV_INOTIFY_HASHSIZE 1
210# else
211# define EV_INOTIFY_HASHSIZE 16
212# endif
213#endif
214
215/**/
216
217#ifndef CLOCK_MONOTONIC
218# undef EV_USE_MONOTONIC
219# define EV_USE_MONOTONIC 0
220#endif
221
222#ifndef CLOCK_REALTIME
223# undef EV_USE_REALTIME
224# define EV_USE_REALTIME 0
225#endif
226
227#if !EV_STAT_ENABLE
228# undef EV_USE_INOTIFY
229# define EV_USE_INOTIFY 0
230#endif
231
232#if !EV_USE_NANOSLEEP
233# ifndef _WIN32
234# include <sys/select.h>
235# endif
236#endif
237
238#if EV_USE_INOTIFY
239# include <sys/inotify.h>
240#endif
241
242#if EV_SELECT_IS_WINSOCKET
243# include <winsock.h>
244#endif
245
246/**/
247
248/*
249 * This is used to avoid floating point rounding problems.
250 * It is added to ev_rt_now when scheduling periodics
251 * to ensure progress, time-wise, even when rounding
252 * errors are against us.
253 * This value is good at least till the year 4000.
254 * Better solutions welcome.
255 */
256#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
66 257
67#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 258#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
68#define MAX_BLOCKTIME 59.731 259#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
69#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */ 260/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
70 261
71#include "ev.h" 262#if __GNUC__ >= 4
263# define expect(expr,value) __builtin_expect ((expr),(value))
264# define noinline __attribute__ ((noinline))
265#else
266# define expect(expr,value) (expr)
267# define noinline
268# if __STDC_VERSION__ < 199901L
269# define inline
270# endif
271#endif
72 272
273#define expect_false(expr) expect ((expr) != 0, 0)
274#define expect_true(expr) expect ((expr) != 0, 1)
275#define inline_size static inline
276
277#if EV_MINIMAL
278# define inline_speed static noinline
279#else
280# define inline_speed static inline
281#endif
282
283#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
284#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
285
286#define EMPTY /* required for microsofts broken pseudo-c compiler */
287#define EMPTY2(a,b) /* used to suppress some warnings */
288
73typedef struct ev_watcher *W; 289typedef ev_watcher *W;
74typedef struct ev_watcher_list *WL; 290typedef ev_watcher_list *WL;
75typedef struct ev_watcher_time *WT; 291typedef ev_watcher_time *WT;
76 292
77static ev_tstamp now, diff; /* monotonic clock */ 293#if EV_USE_MONOTONIC
294/* sig_atomic_t is used to avoid per-thread variables or locking but still */
295/* giving it a reasonably high chance of working on typical architetcures */
296static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
297#endif
298
299#ifdef _WIN32
300# include "ev_win32.c"
301#endif
302
303/*****************************************************************************/
304
305static void (*syserr_cb)(const char *msg);
306
307void
308ev_set_syserr_cb (void (*cb)(const char *msg))
309{
310 syserr_cb = cb;
311}
312
313static void noinline
314syserr (const char *msg)
315{
316 if (!msg)
317 msg = "(libev) system error";
318
319 if (syserr_cb)
320 syserr_cb (msg);
321 else
322 {
323 perror (msg);
324 abort ();
325 }
326}
327
328static void *(*alloc)(void *ptr, long size);
329
330void
331ev_set_allocator (void *(*cb)(void *ptr, long size))
332{
333 alloc = cb;
334}
335
336inline_speed void *
337ev_realloc (void *ptr, long size)
338{
339 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
340
341 if (!ptr && size)
342 {
343 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
344 abort ();
345 }
346
347 return ptr;
348}
349
350#define ev_malloc(size) ev_realloc (0, (size))
351#define ev_free(ptr) ev_realloc ((ptr), 0)
352
353/*****************************************************************************/
354
355typedef struct
356{
357 WL head;
358 unsigned char events;
359 unsigned char reify;
360#if EV_SELECT_IS_WINSOCKET
361 SOCKET handle;
362#endif
363} ANFD;
364
365typedef struct
366{
367 W w;
368 int events;
369} ANPENDING;
370
371#if EV_USE_INOTIFY
372typedef struct
373{
374 WL head;
375} ANFS;
376#endif
377
378#if EV_MULTIPLICITY
379
380 struct ev_loop
381 {
382 ev_tstamp ev_rt_now;
383 #define ev_rt_now ((loop)->ev_rt_now)
384 #define VAR(name,decl) decl;
385 #include "ev_vars.h"
386 #undef VAR
387 };
388 #include "ev_wrap.h"
389
390 static struct ev_loop default_loop_struct;
391 struct ev_loop *ev_default_loop_ptr;
392
393#else
394
78ev_tstamp ev_now; 395 ev_tstamp ev_rt_now;
79int ev_method; 396 #define VAR(name,decl) static decl;
397 #include "ev_vars.h"
398 #undef VAR
80 399
81static int have_monotonic; /* runtime */ 400 static int ev_default_loop_ptr;
82 401
83static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 402#endif
84static void (*method_modify)(int fd, int oev, int nev);
85static void (*method_poll)(ev_tstamp timeout);
86 403
87/*****************************************************************************/ 404/*****************************************************************************/
88 405
89ev_tstamp 406ev_tstamp
90ev_time (void) 407ev_time (void)
… …
98 gettimeofday (&tv, 0); 415 gettimeofday (&tv, 0);
99 return tv.tv_sec + tv.tv_usec * 1e-6; 416 return tv.tv_sec + tv.tv_usec * 1e-6;
100#endif 417#endif
101} 418}
102 419
103static ev_tstamp 420ev_tstamp inline_size
104get_clock (void) 421get_clock (void)
105{ 422{
106#if EV_USE_MONOTONIC 423#if EV_USE_MONOTONIC
107 if (have_monotonic) 424 if (expect_true (have_monotonic))
108 { 425 {
109 struct timespec ts; 426 struct timespec ts;
110 clock_gettime (CLOCK_MONOTONIC, &ts); 427 clock_gettime (CLOCK_MONOTONIC, &ts);
111 return ts.tv_sec + ts.tv_nsec * 1e-9; 428 return ts.tv_sec + ts.tv_nsec * 1e-9;
112 } 429 }
113#endif 430#endif
114 431
115 return ev_time (); 432 return ev_time ();
116} 433}
117 434
118#define array_nextsize(n) (((n) << 1) | 4 & ~3) 435#if EV_MULTIPLICITY
119#define array_prevsize(n) (((n) >> 1) | 4 & ~3) 436ev_tstamp
437ev_now (EV_P)
438{
439 return ev_rt_now;
440}
441#endif
120 442
121#define array_needsize(base,cur,cnt,init) \ 443void
122 if ((cnt) > cur) \ 444ev_sleep (ev_tstamp delay)
123 { \ 445{
124 int newcnt = cur; \ 446 if (delay > 0.)
125 do \
126 { \
127 newcnt = array_nextsize (newcnt); \
128 } \
129 while ((cnt) > newcnt); \
130 \
131 base = realloc (base, sizeof (*base) * (newcnt)); \
132 init (base + cur, newcnt - cur); \
133 cur = newcnt; \
134 } 447 {
448#if EV_USE_NANOSLEEP
449 struct timespec ts;
450
451 ts.tv_sec = (time_t)delay;
452 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
453
454 nanosleep (&ts, 0);
455#elif defined(_WIN32)
456 Sleep (delay * 1e3);
457#else
458 struct timeval tv;
459
460 tv.tv_sec = (time_t)delay;
461 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
462
463 select (0, 0, 0, 0, &tv);
464#endif
465 }
466}
135 467
136/*****************************************************************************/ 468/*****************************************************************************/
137 469
138typedef struct 470int inline_size
471array_nextsize (int elem, int cur, int cnt)
139{ 472{
140 struct ev_io *head; 473 int ncur = cur + 1;
141 int events;
142} ANFD;
143 474
144static ANFD *anfds; 475 do
145static int anfdmax; 476 ncur <<= 1;
477 while (cnt > ncur);
146 478
147static void 479 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
480 if (elem * ncur > 4096)
481 {
482 ncur *= elem;
483 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
484 ncur = ncur - sizeof (void *) * 4;
485 ncur /= elem;
486 }
487
488 return ncur;
489}
490
491static noinline void *
492array_realloc (int elem, void *base, int *cur, int cnt)
493{
494 *cur = array_nextsize (elem, *cur, cnt);
495 return ev_realloc (base, elem * *cur);
496}
497
498#define array_needsize(type,base,cur,cnt,init) \
499 if (expect_false ((cnt) > (cur))) \
500 { \
501 int ocur_ = (cur); \
502 (base) = (type *)array_realloc \
503 (sizeof (type), (base), &(cur), (cnt)); \
504 init ((base) + (ocur_), (cur) - ocur_); \
505 }
506
507#if 0
508#define array_slim(type,stem) \
509 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
510 { \
511 stem ## max = array_roundsize (stem ## cnt >> 1); \
512 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
513 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
514 }
515#endif
516
517#define array_free(stem, idx) \
518 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
519
520/*****************************************************************************/
521
522void noinline
523ev_feed_event (EV_P_ void *w, int revents)
524{
525 W w_ = (W)w;
526 int pri = ABSPRI (w_);
527
528 if (expect_false (w_->pending))
529 pendings [pri][w_->pending - 1].events |= revents;
530 else
531 {
532 w_->pending = ++pendingcnt [pri];
533 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
534 pendings [pri][w_->pending - 1].w = w_;
535 pendings [pri][w_->pending - 1].events = revents;
536 }
537}
538
539void inline_speed
540queue_events (EV_P_ W *events, int eventcnt, int type)
541{
542 int i;
543
544 for (i = 0; i < eventcnt; ++i)
545 ev_feed_event (EV_A_ events [i], type);
546}
547
548/*****************************************************************************/
549
550void inline_size
148anfds_init (ANFD *base, int count) 551anfds_init (ANFD *base, int count)
149{ 552{
150 while (count--) 553 while (count--)
151 { 554 {
152 base->head = 0; 555 base->head = 0;
153 base->events = EV_NONE; 556 base->events = EV_NONE;
557 base->reify = 0;
558
154 ++base; 559 ++base;
155 } 560 }
156} 561}
157 562
158typedef struct 563void inline_speed
159{
160 W w;
161 int events;
162} ANPENDING;
163
164static ANPENDING *pendings;
165static int pendingmax, pendingcnt;
166
167static void
168event (W w, int events)
169{
170 if (w->active)
171 {
172 w->pending = ++pendingcnt;
173 array_needsize (pendings, pendingmax, pendingcnt, );
174 pendings [pendingcnt - 1].w = w;
175 pendings [pendingcnt - 1].events = events;
176 }
177}
178
179static void
180queue_events (W *events, int eventcnt, int type)
181{
182 int i;
183
184 for (i = 0; i < eventcnt; ++i)
185 event (events [i], type);
186}
187
188static void
189fd_event (int fd, int events) 564fd_event (EV_P_ int fd, int revents)
190{ 565{
191 ANFD *anfd = anfds + fd; 566 ANFD *anfd = anfds + fd;
192 struct ev_io *w; 567 ev_io *w;
193 568
194 for (w = anfd->head; w; w = w->next) 569 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
195 { 570 {
196 int ev = w->events & events; 571 int ev = w->events & revents;
197 572
198 if (ev) 573 if (ev)
199 event ((W)w, ev); 574 ev_feed_event (EV_A_ (W)w, ev);
200 } 575 }
201} 576}
202 577
203/*****************************************************************************/ 578void
579ev_feed_fd_event (EV_P_ int fd, int revents)
580{
581 if (fd >= 0 && fd < anfdmax)
582 fd_event (EV_A_ fd, revents);
583}
204 584
205static int *fdchanges; 585void inline_size
206static int fdchangemax, fdchangecnt; 586fd_reify (EV_P)
207
208static void
209fd_reify (void)
210{ 587{
211 int i; 588 int i;
212 589
213 for (i = 0; i < fdchangecnt; ++i) 590 for (i = 0; i < fdchangecnt; ++i)
214 { 591 {
215 int fd = fdchanges [i]; 592 int fd = fdchanges [i];
216 ANFD *anfd = anfds + fd; 593 ANFD *anfd = anfds + fd;
217 struct ev_io *w; 594 ev_io *w;
218 595
219 int events = 0; 596 unsigned char events = 0;
220 597
221 for (w = anfd->head; w; w = w->next) 598 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
222 events |= w->events; 599 events |= (unsigned char)w->events;
223 600
224 anfd->events &= ~EV_REIFY; 601#if EV_SELECT_IS_WINSOCKET
225 602 if (events)
226 if (anfd->events != events)
227 { 603 {
228 method_modify (fd, anfd->events, events); 604 unsigned long argp;
229 anfd->events = events; 605 #ifdef EV_FD_TO_WIN32_HANDLE
606 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
607 #else
608 anfd->handle = _get_osfhandle (fd);
609 #endif
610 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
230 } 611 }
612#endif
613
614 {
615 unsigned char o_events = anfd->events;
616 unsigned char o_reify = anfd->reify;
617
618 anfd->reify = 0;
619 anfd->events = events;
620
621 if (o_events != events || o_reify & EV_IOFDSET)
622 backend_modify (EV_A_ fd, o_events, events);
623 }
231 } 624 }
232 625
233 fdchangecnt = 0; 626 fdchangecnt = 0;
234} 627}
235 628
236static void 629void inline_size
237fd_change (int fd) 630fd_change (EV_P_ int fd, int flags)
238{ 631{
239 if (anfds [fd].events & EV_REIFY || fdchangecnt < 0) 632 unsigned char reify = anfds [fd].reify;
240 return; 633 anfds [fd].reify |= flags;
241 634
242 anfds [fd].events |= EV_REIFY; 635 if (expect_true (!reify))
243 636 {
244 ++fdchangecnt; 637 ++fdchangecnt;
245 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 638 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
246 fdchanges [fdchangecnt - 1] = fd; 639 fdchanges [fdchangecnt - 1] = fd;
640 }
641}
642
643void inline_speed
644fd_kill (EV_P_ int fd)
645{
646 ev_io *w;
647
648 while ((w = (ev_io *)anfds [fd].head))
649 {
650 ev_io_stop (EV_A_ w);
651 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
652 }
653}
654
655int inline_size
656fd_valid (int fd)
657{
658#ifdef _WIN32
659 return _get_osfhandle (fd) != -1;
660#else
661 return fcntl (fd, F_GETFD) != -1;
662#endif
247} 663}
248 664
249/* called on EBADF to verify fds */ 665/* called on EBADF to verify fds */
250static void 666static void noinline
251fd_recheck (void) 667fd_ebadf (EV_P)
252{ 668{
253 int fd; 669 int fd;
254 670
255 for (fd = 0; fd < anfdmax; ++fd) 671 for (fd = 0; fd < anfdmax; ++fd)
256 if (anfds [fd].events) 672 if (anfds [fd].events)
257 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 673 if (!fd_valid (fd) == -1 && errno == EBADF)
258 while (anfds [fd].head) 674 fd_kill (EV_A_ fd);
675}
676
677/* called on ENOMEM in select/poll to kill some fds and retry */
678static void noinline
679fd_enomem (EV_P)
680{
681 int fd;
682
683 for (fd = anfdmax; fd--; )
684 if (anfds [fd].events)
259 { 685 {
260 event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT); 686 fd_kill (EV_A_ fd);
261 ev_io_stop (anfds [fd].head); 687 return;
262 } 688 }
689}
690
691/* usually called after fork if backend needs to re-arm all fds from scratch */
692static void noinline
693fd_rearm_all (EV_P)
694{
695 int fd;
696
697 for (fd = 0; fd < anfdmax; ++fd)
698 if (anfds [fd].events)
699 {
700 anfds [fd].events = 0;
701 fd_change (EV_A_ fd, EV_IOFDSET | 1);
702 }
263} 703}
264 704
265/*****************************************************************************/ 705/*****************************************************************************/
266 706
267static struct ev_timer **timers; 707void inline_speed
268static int timermax, timercnt;
269
270static struct ev_periodic **periodics;
271static int periodicmax, periodiccnt;
272
273static void
274upheap (WT *timers, int k) 708upheap (WT *heap, int k)
275{ 709{
276 WT w = timers [k]; 710 WT w = heap [k];
277 711
278 while (k && timers [k >> 1]->at > w->at) 712 while (k)
279 {
280 timers [k] = timers [k >> 1];
281 timers [k]->active = k + 1;
282 k >>= 1;
283 } 713 {
284
285 timers [k] = w;
286 timers [k]->active = k + 1;
287
288}
289
290static void
291downheap (WT *timers, int N, int k)
292{
293 WT w = timers [k];
294
295 while (k < (N >> 1))
296 {
297 int j = k << 1; 714 int p = (k - 1) >> 1;
298 715
299 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 716 if (heap [p]->at <= w->at)
300 ++j;
301
302 if (w->at <= timers [j]->at)
303 break; 717 break;
304 718
305 timers [k] = timers [j]; 719 heap [k] = heap [p];
306 timers [k]->active = k + 1; 720 ((W)heap [k])->active = k + 1;
307 k = j; 721 k = p;
722 }
723
724 heap [k] = w;
725 ((W)heap [k])->active = k + 1;
726}
727
728void inline_speed
729downheap (WT *heap, int N, int k)
730{
731 WT w = heap [k];
732
733 for (;;)
308 } 734 {
735 int c = (k << 1) + 1;
309 736
737 if (c >= N)
738 break;
739
740 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
741 ? 1 : 0;
742
743 if (w->at <= heap [c]->at)
744 break;
745
746 heap [k] = heap [c];
747 ((W)heap [k])->active = k + 1;
748
749 k = c;
750 }
751
310 timers [k] = w; 752 heap [k] = w;
311 timers [k]->active = k + 1; 753 ((W)heap [k])->active = k + 1;
754}
755
756void inline_size
757adjustheap (WT *heap, int N, int k)
758{
759 upheap (heap, k);
760 downheap (heap, N, k);
312} 761}
313 762
314/*****************************************************************************/ 763/*****************************************************************************/
315 764
316typedef struct 765typedef struct
317{ 766{
318 struct ev_signal *head; 767 WL head;
319 sig_atomic_t gotsig; 768 EV_ATOMIC_T gotsig;
320} ANSIG; 769} ANSIG;
321 770
322static ANSIG *signals; 771static ANSIG *signals;
323static int signalmax; 772static int signalmax;
324 773
325static int sigpipe [2]; 774static EV_ATOMIC_T gotsig;
326static sig_atomic_t gotsig;
327static struct ev_io sigev;
328 775
329static void 776void inline_size
330signals_init (ANSIG *base, int count) 777signals_init (ANSIG *base, int count)
331{ 778{
332 while (count--) 779 while (count--)
333 { 780 {
334 base->head = 0; 781 base->head = 0;
335 base->gotsig = 0; 782 base->gotsig = 0;
783
336 ++base; 784 ++base;
337 } 785 }
338} 786}
787
788/*****************************************************************************/
789
790void inline_speed
791fd_intern (int fd)
792{
793#ifdef _WIN32
794 int arg = 1;
795 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
796#else
797 fcntl (fd, F_SETFD, FD_CLOEXEC);
798 fcntl (fd, F_SETFL, O_NONBLOCK);
799#endif
800}
801
802static void noinline
803evpipe_init (EV_P)
804{
805 if (!ev_is_active (&pipeev))
806 {
807 while (pipe (evpipe))
808 syserr ("(libev) error creating signal/async pipe");
809
810 fd_intern (evpipe [0]);
811 fd_intern (evpipe [1]);
812
813 ev_io_set (&pipeev, evpipe [0], EV_READ);
814 ev_io_start (EV_A_ &pipeev);
815 ev_unref (EV_A); /* watcher should not keep loop alive */
816 }
817}
818
819void inline_size
820evpipe_write (EV_P_ int sig, int async)
821{
822 if (!(gotasync || gotsig))
823 {
824 int old_errno = errno; /* save errno becaue write might clobber it */
825
826 if (sig) gotsig = 1;
827 if (async) gotasync = 1;
828
829 write (evpipe [1], &old_errno, 1);
830
831 errno = old_errno;
832 }
833}
834
835static void
836pipecb (EV_P_ ev_io *iow, int revents)
837{
838 {
839 int dummy;
840 read (evpipe [0], &dummy, 1);
841 }
842
843 if (gotsig && ev_is_default_loop (EV_A))
844 {
845 int signum;
846 gotsig = 0;
847
848 for (signum = signalmax; signum--; )
849 if (signals [signum].gotsig)
850 ev_feed_signal_event (EV_A_ signum + 1);
851 }
852
853#if EV_ASYNC_ENABLE
854 if (gotasync)
855 {
856 int i;
857 gotasync = 0;
858
859 for (i = asynccnt; i--; )
860 if (asyncs [i]->sent)
861 {
862 asyncs [i]->sent = 0;
863 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
864 }
865 }
866#endif
867}
868
869/*****************************************************************************/
339 870
340static void 871static void
341sighandler (int signum) 872sighandler (int signum)
342{ 873{
874#if EV_MULTIPLICITY
875 struct ev_loop *loop = &default_loop_struct;
876#endif
877
878#if _WIN32
879 signal (signum, sighandler);
880#endif
881
343 signals [signum - 1].gotsig = 1; 882 signals [signum - 1].gotsig = 1;
344 883 evpipe_write (EV_A_ 1, 0);
345 if (!gotsig)
346 {
347 gotsig = 1;
348 write (sigpipe [1], &gotsig, 1);
349 }
350} 884}
351 885
352static void 886void noinline
353sigcb (struct ev_io *iow, int revents) 887ev_feed_signal_event (EV_P_ int signum)
354{ 888{
355 struct ev_signal *w; 889 WL w;
356 int sig;
357 890
358 gotsig = 0; 891#if EV_MULTIPLICITY
359 read (sigpipe [0], &revents, 1); 892 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
893#endif
360 894
361 for (sig = signalmax; sig--; ) 895 --signum;
362 if (signals [sig].gotsig) 896
363 { 897 if (signum < 0 || signum >= signalmax)
898 return;
899
364 signals [sig].gotsig = 0; 900 signals [signum].gotsig = 0;
365 901
366 for (w = signals [sig].head; w; w = w->next) 902 for (w = signals [signum].head; w; w = w->next)
367 event ((W)w, EV_SIGNAL); 903 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
368 }
369}
370
371static void
372siginit (void)
373{
374 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
375 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
376
377 /* rather than sort out wether we really need nb, set it */
378 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
379 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
380
381 ev_io_set (&sigev, sigpipe [0], EV_READ);
382 ev_io_start (&sigev);
383} 904}
384 905
385/*****************************************************************************/ 906/*****************************************************************************/
386 907
387static struct ev_idle **idles; 908static WL childs [EV_PID_HASHSIZE];
388static int idlemax, idlecnt;
389 909
390static struct ev_prepare **prepares; 910#ifndef _WIN32
391static int preparemax, preparecnt;
392 911
393static struct ev_check **checks;
394static int checkmax, checkcnt;
395
396/*****************************************************************************/
397
398static struct ev_child *childs [PID_HASHSIZE];
399static struct ev_signal childev; 912static ev_signal childev;
913
914#ifndef WIFCONTINUED
915# define WIFCONTINUED(status) 0
916#endif
917
918void inline_speed
919child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
920{
921 ev_child *w;
922 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
923
924 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
925 {
926 if ((w->pid == pid || !w->pid)
927 && (!traced || (w->flags & 1)))
928 {
929 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
930 w->rpid = pid;
931 w->rstatus = status;
932 ev_feed_event (EV_A_ (W)w, EV_CHILD);
933 }
934 }
935}
400 936
401#ifndef WCONTINUED 937#ifndef WCONTINUED
402# define WCONTINUED 0 938# define WCONTINUED 0
403#endif 939#endif
404 940
405static void 941static void
406childcb (struct ev_signal *sw, int revents) 942childcb (EV_P_ ev_signal *sw, int revents)
407{ 943{
408 struct ev_child *w;
409 int pid, status; 944 int pid, status;
410 945
946 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
411 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 947 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
412 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 948 if (!WCONTINUED
413 if (w->pid == pid || w->pid == -1) 949 || errno != EINVAL
414 { 950 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
415 w->status = status; 951 return;
416 event ((W)w, EV_CHILD); 952
417 } 953 /* make sure we are called again until all childs have been reaped */
954 /* we need to do it this way so that the callback gets called before we continue */
955 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
956
957 child_reap (EV_A_ sw, pid, pid, status);
958 if (EV_PID_HASHSIZE > 1)
959 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
418} 960}
961
962#endif
419 963
420/*****************************************************************************/ 964/*****************************************************************************/
421 965
966#if EV_USE_PORT
967# include "ev_port.c"
968#endif
969#if EV_USE_KQUEUE
970# include "ev_kqueue.c"
971#endif
422#if EV_USE_EPOLL 972#if EV_USE_EPOLL
423# include "ev_epoll.c" 973# include "ev_epoll.c"
424#endif 974#endif
975#if EV_USE_POLL
976# include "ev_poll.c"
977#endif
425#if EV_USE_SELECT 978#if EV_USE_SELECT
426# include "ev_select.c" 979# include "ev_select.c"
427#endif 980#endif
428 981
429int 982int
… …
436ev_version_minor (void) 989ev_version_minor (void)
437{ 990{
438 return EV_VERSION_MINOR; 991 return EV_VERSION_MINOR;
439} 992}
440 993
441int ev_init (int flags) 994/* return true if we are running with elevated privileges and should ignore env variables */
995int inline_size
996enable_secure (void)
442{ 997{
443 if (!ev_method) 998#ifdef _WIN32
999 return 0;
1000#else
1001 return getuid () != geteuid ()
1002 || getgid () != getegid ();
1003#endif
1004}
1005
1006unsigned int
1007ev_supported_backends (void)
1008{
1009 unsigned int flags = 0;
1010
1011 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1012 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1013 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1014 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1015 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1016
1017 return flags;
1018}
1019
1020unsigned int
1021ev_recommended_backends (void)
1022{
1023 unsigned int flags = ev_supported_backends ();
1024
1025#ifndef __NetBSD__
1026 /* kqueue is borked on everything but netbsd apparently */
1027 /* it usually doesn't work correctly on anything but sockets and pipes */
1028 flags &= ~EVBACKEND_KQUEUE;
1029#endif
1030#ifdef __APPLE__
1031 // flags &= ~EVBACKEND_KQUEUE; for documentation
1032 flags &= ~EVBACKEND_POLL;
1033#endif
1034
1035 return flags;
1036}
1037
1038unsigned int
1039ev_embeddable_backends (void)
1040{
1041 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1042
1043 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1044 /* please fix it and tell me how to detect the fix */
1045 flags &= ~EVBACKEND_EPOLL;
1046
1047 return flags;
1048}
1049
1050unsigned int
1051ev_backend (EV_P)
1052{
1053 return backend;
1054}
1055
1056unsigned int
1057ev_loop_count (EV_P)
1058{
1059 return loop_count;
1060}
1061
1062void
1063ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1064{
1065 io_blocktime = interval;
1066}
1067
1068void
1069ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1070{
1071 timeout_blocktime = interval;
1072}
1073
1074static void noinline
1075loop_init (EV_P_ unsigned int flags)
1076{
1077 if (!backend)
444 { 1078 {
445#if EV_USE_MONOTONIC 1079#if EV_USE_MONOTONIC
446 { 1080 {
447 struct timespec ts; 1081 struct timespec ts;
448 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1082 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
449 have_monotonic = 1; 1083 have_monotonic = 1;
450 } 1084 }
451#endif 1085#endif
452 1086
453 ev_now = ev_time (); 1087 ev_rt_now = ev_time ();
454 now = get_clock (); 1088 mn_now = get_clock ();
1089 now_floor = mn_now;
455 diff = ev_now - now; 1090 rtmn_diff = ev_rt_now - mn_now;
456 1091
457 if (pipe (sigpipe)) 1092 io_blocktime = 0.;
458 return 0; 1093 timeout_blocktime = 0.;
1094 backend = 0;
1095 backend_fd = -1;
1096 gotasync = 0;
1097#if EV_USE_INOTIFY
1098 fs_fd = -2;
1099#endif
459 1100
460 ev_method = EVMETHOD_NONE; 1101 /* pid check not overridable via env */
1102#ifndef _WIN32
1103 if (flags & EVFLAG_FORKCHECK)
1104 curpid = getpid ();
1105#endif
1106
1107 if (!(flags & EVFLAG_NOENV)
1108 && !enable_secure ()
1109 && getenv ("LIBEV_FLAGS"))
1110 flags = atoi (getenv ("LIBEV_FLAGS"));
1111
1112 if (!(flags & 0x0000ffffUL))
1113 flags |= ev_recommended_backends ();
1114
1115#if EV_USE_PORT
1116 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1117#endif
1118#if EV_USE_KQUEUE
1119 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1120#endif
461#if EV_USE_EPOLL 1121#if EV_USE_EPOLL
462 if (ev_method == EVMETHOD_NONE) epoll_init (flags); 1122 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1123#endif
1124#if EV_USE_POLL
1125 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
463#endif 1126#endif
464#if EV_USE_SELECT 1127#if EV_USE_SELECT
465 if (ev_method == EVMETHOD_NONE) select_init (flags); 1128 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
466#endif 1129#endif
467 1130
468 if (ev_method) 1131 ev_init (&pipeev, pipecb);
1132 ev_set_priority (&pipeev, EV_MAXPRI);
1133 }
1134}
1135
1136static void noinline
1137loop_destroy (EV_P)
1138{
1139 int i;
1140
1141 if (ev_is_active (&pipeev))
1142 {
1143 ev_ref (EV_A); /* signal watcher */
1144 ev_io_stop (EV_A_ &pipeev);
1145
1146 close (evpipe [0]); evpipe [0] = 0;
1147 close (evpipe [1]); evpipe [1] = 0;
1148 }
1149
1150#if EV_USE_INOTIFY
1151 if (fs_fd >= 0)
1152 close (fs_fd);
1153#endif
1154
1155 if (backend_fd >= 0)
1156 close (backend_fd);
1157
1158#if EV_USE_PORT
1159 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1160#endif
1161#if EV_USE_KQUEUE
1162 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1163#endif
1164#if EV_USE_EPOLL
1165 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1166#endif
1167#if EV_USE_POLL
1168 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1169#endif
1170#if EV_USE_SELECT
1171 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1172#endif
1173
1174 for (i = NUMPRI; i--; )
1175 {
1176 array_free (pending, [i]);
1177#if EV_IDLE_ENABLE
1178 array_free (idle, [i]);
1179#endif
1180 }
1181
1182 ev_free (anfds); anfdmax = 0;
1183
1184 /* have to use the microsoft-never-gets-it-right macro */
1185 array_free (fdchange, EMPTY);
1186 array_free (timer, EMPTY);
1187#if EV_PERIODIC_ENABLE
1188 array_free (periodic, EMPTY);
1189#endif
1190#if EV_FORK_ENABLE
1191 array_free (fork, EMPTY);
1192#endif
1193 array_free (prepare, EMPTY);
1194 array_free (check, EMPTY);
1195#if EV_ASYNC_ENABLE
1196 array_free (async, EMPTY);
1197#endif
1198
1199 backend = 0;
1200}
1201
1202void inline_size infy_fork (EV_P);
1203
1204void inline_size
1205loop_fork (EV_P)
1206{
1207#if EV_USE_PORT
1208 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1209#endif
1210#if EV_USE_KQUEUE
1211 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1212#endif
1213#if EV_USE_EPOLL
1214 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1215#endif
1216#if EV_USE_INOTIFY
1217 infy_fork (EV_A);
1218#endif
1219
1220 if (ev_is_active (&pipeev))
1221 {
1222 /* this "locks" the handlers against writing to the pipe */
1223 /* while we modify the fd vars */
1224 gotsig = 1;
1225#if EV_ASYNC_ENABLE
1226 gotasync = 1;
1227#endif
1228
1229 ev_ref (EV_A);
1230 ev_io_stop (EV_A_ &pipeev);
1231 close (evpipe [0]);
1232 close (evpipe [1]);
1233
1234 evpipe_init (EV_A);
1235 /* now iterate over everything, in case we missed something */
1236 pipecb (EV_A_ &pipeev, EV_READ);
1237 }
1238
1239 postfork = 0;
1240}
1241
1242#if EV_MULTIPLICITY
1243struct ev_loop *
1244ev_loop_new (unsigned int flags)
1245{
1246 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1247
1248 memset (loop, 0, sizeof (struct ev_loop));
1249
1250 loop_init (EV_A_ flags);
1251
1252 if (ev_backend (EV_A))
1253 return loop;
1254
1255 return 0;
1256}
1257
1258void
1259ev_loop_destroy (EV_P)
1260{
1261 loop_destroy (EV_A);
1262 ev_free (loop);
1263}
1264
1265void
1266ev_loop_fork (EV_P)
1267{
1268 postfork = 1; /* must be in line with ev_default_fork */
1269}
1270
1271#endif
1272
1273#if EV_MULTIPLICITY
1274struct ev_loop *
1275ev_default_loop_init (unsigned int flags)
1276#else
1277int
1278ev_default_loop (unsigned int flags)
1279#endif
1280{
1281 if (!ev_default_loop_ptr)
1282 {
1283#if EV_MULTIPLICITY
1284 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1285#else
1286 ev_default_loop_ptr = 1;
1287#endif
1288
1289 loop_init (EV_A_ flags);
1290
1291 if (ev_backend (EV_A))
469 { 1292 {
470 ev_watcher_init (&sigev, sigcb); 1293#ifndef _WIN32
471 siginit ();
472
473 ev_signal_init (&childev, childcb, SIGCHLD); 1294 ev_signal_init (&childev, childcb, SIGCHLD);
1295 ev_set_priority (&childev, EV_MAXPRI);
474 ev_signal_start (&childev); 1296 ev_signal_start (EV_A_ &childev);
1297 ev_unref (EV_A); /* child watcher should not keep loop alive */
1298#endif
475 } 1299 }
1300 else
1301 ev_default_loop_ptr = 0;
476 } 1302 }
477 1303
478 return ev_method; 1304 return ev_default_loop_ptr;
1305}
1306
1307void
1308ev_default_destroy (void)
1309{
1310#if EV_MULTIPLICITY
1311 struct ev_loop *loop = ev_default_loop_ptr;
1312#endif
1313
1314#ifndef _WIN32
1315 ev_ref (EV_A); /* child watcher */
1316 ev_signal_stop (EV_A_ &childev);
1317#endif
1318
1319 loop_destroy (EV_A);
1320}
1321
1322void
1323ev_default_fork (void)
1324{
1325#if EV_MULTIPLICITY
1326 struct ev_loop *loop = ev_default_loop_ptr;
1327#endif
1328
1329 if (backend)
1330 postfork = 1; /* must be in line with ev_loop_fork */
479} 1331}
480 1332
481/*****************************************************************************/ 1333/*****************************************************************************/
482 1334
483void 1335void
484ev_prefork (void) 1336ev_invoke (EV_P_ void *w, int revents)
485{ 1337{
486 /* nop */ 1338 EV_CB_INVOKE ((W)w, revents);
487} 1339}
488 1340
489void 1341void inline_speed
490ev_postfork_parent (void)
491{
492 /* nop */
493}
494
495void
496ev_postfork_child (void)
497{
498#if EV_USE_EPOLL
499 if (ev_method == EVMETHOD_EPOLL)
500 epoll_postfork_child ();
501#endif
502
503 ev_io_stop (&sigev);
504 close (sigpipe [0]);
505 close (sigpipe [1]);
506 pipe (sigpipe);
507 siginit ();
508}
509
510/*****************************************************************************/
511
512static void
513call_pending (void) 1342call_pending (EV_P)
514{ 1343{
1344 int pri;
1345
1346 for (pri = NUMPRI; pri--; )
515 while (pendingcnt) 1347 while (pendingcnt [pri])
516 { 1348 {
517 ANPENDING *p = pendings + --pendingcnt; 1349 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
518 1350
519 if (p->w) 1351 if (expect_true (p->w))
520 { 1352 {
1353 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1354
521 p->w->pending = 0; 1355 p->w->pending = 0;
522 p->w->cb (p->w, p->events); 1356 EV_CB_INVOKE (p->w, p->events);
523 } 1357 }
524 } 1358 }
525} 1359}
526 1360
527static void 1361void inline_size
528timers_reify (void) 1362timers_reify (EV_P)
529{ 1363{
530 while (timercnt && timers [0]->at <= now) 1364 while (timercnt && ((WT)timers [0])->at <= mn_now)
531 { 1365 {
532 struct ev_timer *w = timers [0]; 1366 ev_timer *w = (ev_timer *)timers [0];
533 1367
534 event ((W)w, EV_TIMEOUT); 1368 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
535 1369
536 /* first reschedule or stop timer */ 1370 /* first reschedule or stop timer */
537 if (w->repeat) 1371 if (w->repeat)
538 { 1372 {
1373 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1374
539 w->at = now + w->repeat; 1375 ((WT)w)->at += w->repeat;
540 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1376 if (((WT)w)->at < mn_now)
1377 ((WT)w)->at = mn_now;
1378
541 downheap ((WT *)timers, timercnt, 0); 1379 downheap (timers, timercnt, 0);
542 } 1380 }
543 else 1381 else
544 ev_timer_stop (w); /* nonrepeating: stop timer */ 1382 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
545 }
546}
547 1383
548static void 1384 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1385 }
1386}
1387
1388#if EV_PERIODIC_ENABLE
1389void inline_size
549periodics_reify (void) 1390periodics_reify (EV_P)
550{ 1391{
551 while (periodiccnt && periodics [0]->at <= ev_now) 1392 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
552 { 1393 {
553 struct ev_periodic *w = periodics [0]; 1394 ev_periodic *w = (ev_periodic *)periodics [0];
1395
1396 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
554 1397
555 /* first reschedule or stop timer */ 1398 /* first reschedule or stop timer */
556 if (w->interval) 1399 if (w->reschedule_cb)
557 { 1400 {
558 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1401 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
559 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1402 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
560 downheap ((WT *)periodics, periodiccnt, 0); 1403 downheap (periodics, periodiccnt, 0);
1404 }
1405 else if (w->interval)
1406 {
1407 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1408 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1409 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1410 downheap (periodics, periodiccnt, 0);
561 } 1411 }
562 else 1412 else
563 ev_periodic_stop (w); /* nonrepeating: stop timer */ 1413 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
564 1414
565 event ((W)w, EV_TIMEOUT); 1415 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
566 } 1416 }
567} 1417}
568 1418
569static void 1419static void noinline
570periodics_reschedule (ev_tstamp diff) 1420periodics_reschedule (EV_P)
571{ 1421{
572 int i; 1422 int i;
573 1423
574 /* adjust periodics after time jump */ 1424 /* adjust periodics after time jump */
575 for (i = 0; i < periodiccnt; ++i) 1425 for (i = 0; i < periodiccnt; ++i)
576 { 1426 {
577 struct ev_periodic *w = periodics [i]; 1427 ev_periodic *w = (ev_periodic *)periodics [i];
578 1428
1429 if (w->reschedule_cb)
1430 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
579 if (w->interval) 1431 else if (w->interval)
1432 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1433 }
1434
1435 /* now rebuild the heap */
1436 for (i = periodiccnt >> 1; i--; )
1437 downheap (periodics, periodiccnt, i);
1438}
1439#endif
1440
1441#if EV_IDLE_ENABLE
1442void inline_size
1443idle_reify (EV_P)
1444{
1445 if (expect_false (idleall))
1446 {
1447 int pri;
1448
1449 for (pri = NUMPRI; pri--; )
580 { 1450 {
581 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1451 if (pendingcnt [pri])
1452 break;
582 1453
583 if (fabs (diff) >= 1e-4) 1454 if (idlecnt [pri])
584 { 1455 {
585 ev_periodic_stop (w); 1456 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
586 ev_periodic_start (w); 1457 break;
587
588 i = 0; /* restart loop, inefficient, but time jumps should be rare */
589 } 1458 }
590 } 1459 }
591 } 1460 }
592} 1461}
1462#endif
593 1463
594static void 1464void inline_speed
595time_update (void) 1465time_update (EV_P_ ev_tstamp max_block)
596{ 1466{
597 int i; 1467 int i;
598 1468
599 ev_now = ev_time (); 1469#if EV_USE_MONOTONIC
600
601 if (have_monotonic) 1470 if (expect_true (have_monotonic))
602 { 1471 {
603 ev_tstamp odiff = diff; 1472 ev_tstamp odiff = rtmn_diff;
604 1473
605 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1474 mn_now = get_clock ();
1475
1476 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1477 /* interpolate in the meantime */
1478 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
606 { 1479 {
607 now = get_clock (); 1480 ev_rt_now = rtmn_diff + mn_now;
1481 return;
1482 }
1483
1484 now_floor = mn_now;
1485 ev_rt_now = ev_time ();
1486
1487 /* loop a few times, before making important decisions.
1488 * on the choice of "4": one iteration isn't enough,
1489 * in case we get preempted during the calls to
1490 * ev_time and get_clock. a second call is almost guaranteed
1491 * to succeed in that case, though. and looping a few more times
1492 * doesn't hurt either as we only do this on time-jumps or
1493 * in the unlikely event of having been preempted here.
1494 */
1495 for (i = 4; --i; )
1496 {
608 diff = ev_now - now; 1497 rtmn_diff = ev_rt_now - mn_now;
609 1498
610 if (fabs (odiff - diff) < MIN_TIMEJUMP) 1499 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
611 return; /* all is well */ 1500 return; /* all is well */
612 1501
613 ev_now = ev_time (); 1502 ev_rt_now = ev_time ();
1503 mn_now = get_clock ();
1504 now_floor = mn_now;
614 } 1505 }
615 1506
1507# if EV_PERIODIC_ENABLE
616 periodics_reschedule (diff - odiff); 1508 periodics_reschedule (EV_A);
1509# endif
617 /* no timer adjustment, as the monotonic clock doesn't jump */ 1510 /* no timer adjustment, as the monotonic clock doesn't jump */
1511 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
618 } 1512 }
619 else 1513 else
1514#endif
620 { 1515 {
621 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 1516 ev_rt_now = ev_time ();
1517
1518 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
622 { 1519 {
1520#if EV_PERIODIC_ENABLE
623 periodics_reschedule (ev_now - now); 1521 periodics_reschedule (EV_A);
624 1522#endif
625 /* adjust timers. this is easy, as the offset is the same for all */ 1523 /* adjust timers. this is easy, as the offset is the same for all of them */
626 for (i = 0; i < timercnt; ++i) 1524 for (i = 0; i < timercnt; ++i)
627 timers [i]->at += diff; 1525 ((WT)timers [i])->at += ev_rt_now - mn_now;
628 } 1526 }
629 1527
630 now = ev_now; 1528 mn_now = ev_rt_now;
631 } 1529 }
632} 1530}
633 1531
634int ev_loop_done; 1532void
1533ev_ref (EV_P)
1534{
1535 ++activecnt;
1536}
635 1537
1538void
1539ev_unref (EV_P)
1540{
1541 --activecnt;
1542}
1543
1544static int loop_done;
1545
1546void
636void ev_loop (int flags) 1547ev_loop (EV_P_ int flags)
637{ 1548{
638 double block;
639 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1549 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
1550 ? EVUNLOOP_ONE
1551 : EVUNLOOP_CANCEL;
1552
1553 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
640 1554
641 do 1555 do
642 { 1556 {
1557#ifndef _WIN32
1558 if (expect_false (curpid)) /* penalise the forking check even more */
1559 if (expect_false (getpid () != curpid))
1560 {
1561 curpid = getpid ();
1562 postfork = 1;
1563 }
1564#endif
1565
1566#if EV_FORK_ENABLE
1567 /* we might have forked, so queue fork handlers */
1568 if (expect_false (postfork))
1569 if (forkcnt)
1570 {
1571 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1572 call_pending (EV_A);
1573 }
1574#endif
1575
643 /* queue check watchers (and execute them) */ 1576 /* queue prepare watchers (and execute them) */
644 if (preparecnt) 1577 if (expect_false (preparecnt))
645 { 1578 {
646 queue_events ((W *)prepares, preparecnt, EV_PREPARE); 1579 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
647 call_pending (); 1580 call_pending (EV_A);
648 } 1581 }
649 1582
1583 if (expect_false (!activecnt))
1584 break;
1585
1586 /* we might have forked, so reify kernel state if necessary */
1587 if (expect_false (postfork))
1588 loop_fork (EV_A);
1589
650 /* update fd-related kernel structures */ 1590 /* update fd-related kernel structures */
651 fd_reify (); 1591 fd_reify (EV_A);
652 1592
653 /* calculate blocking time */ 1593 /* calculate blocking time */
1594 {
1595 ev_tstamp waittime = 0.;
1596 ev_tstamp sleeptime = 0.;
654 1597
655 /* we only need this for !monotonic clockor timers, but as we basically 1598 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
656 always have timers, we just calculate it always */
657 ev_now = ev_time ();
658
659 if (flags & EVLOOP_NONBLOCK || idlecnt)
660 block = 0.;
661 else
662 { 1599 {
1600 /* update time to cancel out callback processing overhead */
1601 time_update (EV_A_ 1e100);
1602
663 block = MAX_BLOCKTIME; 1603 waittime = MAX_BLOCKTIME;
664 1604
665 if (timercnt) 1605 if (timercnt)
666 { 1606 {
667 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 1607 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
668 if (block > to) block = to; 1608 if (waittime > to) waittime = to;
669 } 1609 }
670 1610
1611#if EV_PERIODIC_ENABLE
671 if (periodiccnt) 1612 if (periodiccnt)
672 { 1613 {
673 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1614 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
674 if (block > to) block = to; 1615 if (waittime > to) waittime = to;
675 } 1616 }
1617#endif
676 1618
677 if (block < 0.) block = 0.; 1619 if (expect_false (waittime < timeout_blocktime))
1620 waittime = timeout_blocktime;
1621
1622 sleeptime = waittime - backend_fudge;
1623
1624 if (expect_true (sleeptime > io_blocktime))
1625 sleeptime = io_blocktime;
1626
1627 if (sleeptime)
1628 {
1629 ev_sleep (sleeptime);
1630 waittime -= sleeptime;
1631 }
678 } 1632 }
679 1633
680 method_poll (block); 1634 ++loop_count;
1635 backend_poll (EV_A_ waittime);
681 1636
682 /* update ev_now, do magic */ 1637 /* update ev_rt_now, do magic */
683 time_update (); 1638 time_update (EV_A_ waittime + sleeptime);
1639 }
684 1640
685 /* queue pending timers and reschedule them */ 1641 /* queue pending timers and reschedule them */
686 timers_reify (); /* relative timers called last */ 1642 timers_reify (EV_A); /* relative timers called last */
1643#if EV_PERIODIC_ENABLE
687 periodics_reify (); /* absolute timers called first */ 1644 periodics_reify (EV_A); /* absolute timers called first */
1645#endif
688 1646
1647#if EV_IDLE_ENABLE
689 /* queue idle watchers unless io or timers are pending */ 1648 /* queue idle watchers unless other events are pending */
690 if (!pendingcnt) 1649 idle_reify (EV_A);
691 queue_events ((W *)idles, idlecnt, EV_IDLE); 1650#endif
692 1651
693 /* queue check watchers, to be executed first */ 1652 /* queue check watchers, to be executed first */
694 if (checkcnt) 1653 if (expect_false (checkcnt))
695 queue_events ((W *)checks, checkcnt, EV_CHECK); 1654 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
696 1655
697 call_pending (); 1656 call_pending (EV_A);
698 }
699 while (!ev_loop_done);
700 1657
701 if (ev_loop_done != 2) 1658 }
1659 while (expect_true (activecnt && !loop_done));
1660
1661 if (loop_done == EVUNLOOP_ONE)
1662 loop_done = EVUNLOOP_CANCEL;
1663}
1664
1665void
1666ev_unloop (EV_P_ int how)
1667{
702 ev_loop_done = 0; 1668 loop_done = how;
703} 1669}
704 1670
705/*****************************************************************************/ 1671/*****************************************************************************/
706 1672
707static void 1673void inline_size
708wlist_add (WL *head, WL elem) 1674wlist_add (WL *head, WL elem)
709{ 1675{
710 elem->next = *head; 1676 elem->next = *head;
711 *head = elem; 1677 *head = elem;
712} 1678}
713 1679
714static void 1680void inline_size
715wlist_del (WL *head, WL elem) 1681wlist_del (WL *head, WL elem)
716{ 1682{
717 while (*head) 1683 while (*head)
718 { 1684 {
719 if (*head == elem) 1685 if (*head == elem)
… …
724 1690
725 head = &(*head)->next; 1691 head = &(*head)->next;
726 } 1692 }
727} 1693}
728 1694
729static void 1695void inline_speed
730ev_clear (W w) 1696clear_pending (EV_P_ W w)
731{ 1697{
732 if (w->pending) 1698 if (w->pending)
733 { 1699 {
734 pendings [w->pending - 1].w = 0; 1700 pendings [ABSPRI (w)][w->pending - 1].w = 0;
735 w->pending = 0; 1701 w->pending = 0;
736 } 1702 }
737} 1703}
738 1704
739static void 1705int
1706ev_clear_pending (EV_P_ void *w)
1707{
1708 W w_ = (W)w;
1709 int pending = w_->pending;
1710
1711 if (expect_true (pending))
1712 {
1713 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1714 w_->pending = 0;
1715 p->w = 0;
1716 return p->events;
1717 }
1718 else
1719 return 0;
1720}
1721
1722void inline_size
1723pri_adjust (EV_P_ W w)
1724{
1725 int pri = w->priority;
1726 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1727 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1728 w->priority = pri;
1729}
1730
1731void inline_speed
740ev_start (W w, int active) 1732ev_start (EV_P_ W w, int active)
741{ 1733{
1734 pri_adjust (EV_A_ w);
742 w->active = active; 1735 w->active = active;
1736 ev_ref (EV_A);
743} 1737}
744 1738
745static void 1739void inline_size
746ev_stop (W w) 1740ev_stop (EV_P_ W w)
747{ 1741{
1742 ev_unref (EV_A);
748 w->active = 0; 1743 w->active = 0;
749} 1744}
750 1745
751/*****************************************************************************/ 1746/*****************************************************************************/
752 1747
753void 1748void noinline
754ev_io_start (struct ev_io *w) 1749ev_io_start (EV_P_ ev_io *w)
755{ 1750{
756 if (ev_is_active (w))
757 return;
758
759 int fd = w->fd; 1751 int fd = w->fd;
760 1752
1753 if (expect_false (ev_is_active (w)))
1754 return;
1755
1756 assert (("ev_io_start called with negative fd", fd >= 0));
1757
761 ev_start ((W)w, 1); 1758 ev_start (EV_A_ (W)w, 1);
762 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1759 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
763 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1760 wlist_add (&anfds[fd].head, (WL)w);
764 1761
765 fd_change (fd); 1762 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1763 w->events &= ~EV_IOFDSET;
766} 1764}
767 1765
768void 1766void noinline
769ev_io_stop (struct ev_io *w) 1767ev_io_stop (EV_P_ ev_io *w)
770{ 1768{
771 ev_clear ((W)w); 1769 clear_pending (EV_A_ (W)w);
772 if (!ev_is_active (w)) 1770 if (expect_false (!ev_is_active (w)))
773 return; 1771 return;
774 1772
1773 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1774
775 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1775 wlist_del (&anfds[w->fd].head, (WL)w);
776 ev_stop ((W)w); 1776 ev_stop (EV_A_ (W)w);
777 1777
778 fd_change (w->fd); 1778 fd_change (EV_A_ w->fd, 1);
779} 1779}
780 1780
781void 1781void noinline
782ev_timer_start (struct ev_timer *w) 1782ev_timer_start (EV_P_ ev_timer *w)
783{ 1783{
784 if (ev_is_active (w)) 1784 if (expect_false (ev_is_active (w)))
785 return; 1785 return;
786 1786
787 w->at += now; 1787 ((WT)w)->at += mn_now;
788 1788
789 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 1789 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
790 1790
791 ev_start ((W)w, ++timercnt); 1791 ev_start (EV_A_ (W)w, ++timercnt);
792 array_needsize (timers, timermax, timercnt, ); 1792 array_needsize (WT, timers, timermax, timercnt, EMPTY2);
793 timers [timercnt - 1] = w; 1793 timers [timercnt - 1] = (WT)w;
794 upheap ((WT *)timers, timercnt - 1); 1794 upheap (timers, timercnt - 1);
795}
796 1795
797void 1796 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
1797}
1798
1799void noinline
798ev_timer_stop (struct ev_timer *w) 1800ev_timer_stop (EV_P_ ev_timer *w)
799{ 1801{
800 ev_clear ((W)w); 1802 clear_pending (EV_A_ (W)w);
801 if (!ev_is_active (w)) 1803 if (expect_false (!ev_is_active (w)))
802 return; 1804 return;
803 1805
804 if (w->active < timercnt--) 1806 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
1807
1808 {
1809 int active = ((W)w)->active;
1810
1811 if (expect_true (--active < --timercnt))
805 { 1812 {
806 timers [w->active - 1] = timers [timercnt]; 1813 timers [active] = timers [timercnt];
807 downheap ((WT *)timers, timercnt, w->active - 1); 1814 adjustheap (timers, timercnt, active);
808 } 1815 }
1816 }
809 1817
810 w->at = w->repeat; 1818 ((WT)w)->at -= mn_now;
811 1819
812 ev_stop ((W)w); 1820 ev_stop (EV_A_ (W)w);
813} 1821}
814 1822
815void 1823void noinline
816ev_timer_again (struct ev_timer *w) 1824ev_timer_again (EV_P_ ev_timer *w)
817{ 1825{
818 if (ev_is_active (w)) 1826 if (ev_is_active (w))
819 { 1827 {
820 if (w->repeat) 1828 if (w->repeat)
821 { 1829 {
822 w->at = now + w->repeat; 1830 ((WT)w)->at = mn_now + w->repeat;
823 downheap ((WT *)timers, timercnt, w->active - 1); 1831 adjustheap (timers, timercnt, ((W)w)->active - 1);
824 } 1832 }
825 else 1833 else
826 ev_timer_stop (w); 1834 ev_timer_stop (EV_A_ w);
827 } 1835 }
828 else if (w->repeat) 1836 else if (w->repeat)
1837 {
1838 w->at = w->repeat;
829 ev_timer_start (w); 1839 ev_timer_start (EV_A_ w);
1840 }
830} 1841}
831 1842
832void 1843#if EV_PERIODIC_ENABLE
1844void noinline
833ev_periodic_start (struct ev_periodic *w) 1845ev_periodic_start (EV_P_ ev_periodic *w)
834{ 1846{
835 if (ev_is_active (w)) 1847 if (expect_false (ev_is_active (w)))
836 return; 1848 return;
837 1849
838 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 1850 if (w->reschedule_cb)
839 1851 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1852 else if (w->interval)
1853 {
1854 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
840 /* this formula differs from the one in periodic_reify because we do not always round up */ 1855 /* this formula differs from the one in periodic_reify because we do not always round up */
841 if (w->interval)
842 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval; 1856 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1857 }
1858 else
1859 ((WT)w)->at = w->offset;
843 1860
844 ev_start ((W)w, ++periodiccnt); 1861 ev_start (EV_A_ (W)w, ++periodiccnt);
845 array_needsize (periodics, periodicmax, periodiccnt, ); 1862 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
846 periodics [periodiccnt - 1] = w; 1863 periodics [periodiccnt - 1] = (WT)w;
847 upheap ((WT *)periodics, periodiccnt - 1); 1864 upheap (periodics, periodiccnt - 1);
848}
849 1865
850void 1866 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
1867}
1868
1869void noinline
851ev_periodic_stop (struct ev_periodic *w) 1870ev_periodic_stop (EV_P_ ev_periodic *w)
852{ 1871{
853 ev_clear ((W)w); 1872 clear_pending (EV_A_ (W)w);
854 if (!ev_is_active (w)) 1873 if (expect_false (!ev_is_active (w)))
855 return; 1874 return;
856 1875
857 if (w->active < periodiccnt--) 1876 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
1877
1878 {
1879 int active = ((W)w)->active;
1880
1881 if (expect_true (--active < --periodiccnt))
858 { 1882 {
859 periodics [w->active - 1] = periodics [periodiccnt]; 1883 periodics [active] = periodics [periodiccnt];
860 downheap ((WT *)periodics, periodiccnt, w->active - 1); 1884 adjustheap (periodics, periodiccnt, active);
861 } 1885 }
1886 }
862 1887
863 ev_stop ((W)w); 1888 ev_stop (EV_A_ (W)w);
864} 1889}
865 1890
866void 1891void noinline
1892ev_periodic_again (EV_P_ ev_periodic *w)
1893{
1894 /* TODO: use adjustheap and recalculation */
1895 ev_periodic_stop (EV_A_ w);
1896 ev_periodic_start (EV_A_ w);
1897}
1898#endif
1899
1900#ifndef SA_RESTART
1901# define SA_RESTART 0
1902#endif
1903
1904void noinline
867ev_signal_start (struct ev_signal *w) 1905ev_signal_start (EV_P_ ev_signal *w)
868{ 1906{
1907#if EV_MULTIPLICITY
1908 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1909#endif
869 if (ev_is_active (w)) 1910 if (expect_false (ev_is_active (w)))
870 return; 1911 return;
871 1912
872 ev_start ((W)w, 1); 1913 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1914
1915 evpipe_init (EV_A);
1916
1917 {
1918#ifndef _WIN32
1919 sigset_t full, prev;
1920 sigfillset (&full);
1921 sigprocmask (SIG_SETMASK, &full, &prev);
1922#endif
1923
873 array_needsize (signals, signalmax, w->signum, signals_init); 1924 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1925
1926#ifndef _WIN32
1927 sigprocmask (SIG_SETMASK, &prev, 0);
1928#endif
1929 }
1930
1931 ev_start (EV_A_ (W)w, 1);
874 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 1932 wlist_add (&signals [w->signum - 1].head, (WL)w);
875 1933
876 if (!w->next) 1934 if (!((WL)w)->next)
877 { 1935 {
1936#if _WIN32
1937 signal (w->signum, sighandler);
1938#else
878 struct sigaction sa; 1939 struct sigaction sa;
879 sa.sa_handler = sighandler; 1940 sa.sa_handler = sighandler;
880 sigfillset (&sa.sa_mask); 1941 sigfillset (&sa.sa_mask);
881 sa.sa_flags = 0; 1942 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
882 sigaction (w->signum, &sa, 0); 1943 sigaction (w->signum, &sa, 0);
1944#endif
883 } 1945 }
884} 1946}
885 1947
886void 1948void noinline
887ev_signal_stop (struct ev_signal *w) 1949ev_signal_stop (EV_P_ ev_signal *w)
888{ 1950{
889 ev_clear ((W)w); 1951 clear_pending (EV_A_ (W)w);
890 if (!ev_is_active (w)) 1952 if (expect_false (!ev_is_active (w)))
891 return; 1953 return;
892 1954
893 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 1955 wlist_del (&signals [w->signum - 1].head, (WL)w);
894 ev_stop ((W)w); 1956 ev_stop (EV_A_ (W)w);
895 1957
896 if (!signals [w->signum - 1].head) 1958 if (!signals [w->signum - 1].head)
897 signal (w->signum, SIG_DFL); 1959 signal (w->signum, SIG_DFL);
898} 1960}
899 1961
900void 1962void
901ev_idle_start (struct ev_idle *w) 1963ev_child_start (EV_P_ ev_child *w)
902{ 1964{
1965#if EV_MULTIPLICITY
1966 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1967#endif
903 if (ev_is_active (w)) 1968 if (expect_false (ev_is_active (w)))
904 return; 1969 return;
905 1970
906 ev_start ((W)w, ++idlecnt); 1971 ev_start (EV_A_ (W)w, 1);
907 array_needsize (idles, idlemax, idlecnt, ); 1972 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
908 idles [idlecnt - 1] = w;
909} 1973}
910 1974
911void 1975void
912ev_idle_stop (struct ev_idle *w) 1976ev_child_stop (EV_P_ ev_child *w)
913{ 1977{
914 ev_clear ((W)w); 1978 clear_pending (EV_A_ (W)w);
915 if (ev_is_active (w)) 1979 if (expect_false (!ev_is_active (w)))
916 return; 1980 return;
917 1981
918 idles [w->active - 1] = idles [--idlecnt]; 1982 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
919 ev_stop ((W)w); 1983 ev_stop (EV_A_ (W)w);
920} 1984}
921 1985
1986#if EV_STAT_ENABLE
1987
1988# ifdef _WIN32
1989# undef lstat
1990# define lstat(a,b) _stati64 (a,b)
1991# endif
1992
1993#define DEF_STAT_INTERVAL 5.0074891
1994#define MIN_STAT_INTERVAL 0.1074891
1995
1996static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1997
1998#if EV_USE_INOTIFY
1999# define EV_INOTIFY_BUFSIZE 8192
2000
2001static void noinline
2002infy_add (EV_P_ ev_stat *w)
2003{
2004 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);
2005
2006 if (w->wd < 0)
2007 {
2008 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2009
2010 /* monitor some parent directory for speedup hints */
2011 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2012 {
2013 char path [4096];
2014 strcpy (path, w->path);
2015
2016 do
2017 {
2018 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2019 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2020
2021 char *pend = strrchr (path, '/');
2022
2023 if (!pend)
2024 break; /* whoops, no '/', complain to your admin */
2025
2026 *pend = 0;
2027 w->wd = inotify_add_watch (fs_fd, path, mask);
2028 }
2029 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2030 }
2031 }
2032 else
2033 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2034
2035 if (w->wd >= 0)
2036 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2037}
2038
2039static void noinline
2040infy_del (EV_P_ ev_stat *w)
2041{
2042 int slot;
2043 int wd = w->wd;
2044
2045 if (wd < 0)
2046 return;
2047
2048 w->wd = -2;
2049 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2050 wlist_del (&fs_hash [slot].head, (WL)w);
2051
2052 /* remove this watcher, if others are watching it, they will rearm */
2053 inotify_rm_watch (fs_fd, wd);
2054}
2055
2056static void noinline
2057infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2058{
2059 if (slot < 0)
2060 /* overflow, need to check for all hahs slots */
2061 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2062 infy_wd (EV_A_ slot, wd, ev);
2063 else
2064 {
2065 WL w_;
2066
2067 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2068 {
2069 ev_stat *w = (ev_stat *)w_;
2070 w_ = w_->next; /* lets us remove this watcher and all before it */
2071
2072 if (w->wd == wd || wd == -1)
2073 {
2074 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2075 {
2076 w->wd = -1;
2077 infy_add (EV_A_ w); /* re-add, no matter what */
2078 }
2079
2080 stat_timer_cb (EV_A_ &w->timer, 0);
2081 }
2082 }
2083 }
2084}
2085
2086static void
2087infy_cb (EV_P_ ev_io *w, int revents)
2088{
2089 char buf [EV_INOTIFY_BUFSIZE];
2090 struct inotify_event *ev = (struct inotify_event *)buf;
2091 int ofs;
2092 int len = read (fs_fd, buf, sizeof (buf));
2093
2094 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2095 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2096}
2097
2098void inline_size
2099infy_init (EV_P)
2100{
2101 if (fs_fd != -2)
2102 return;
2103
2104 fs_fd = inotify_init ();
2105
2106 if (fs_fd >= 0)
2107 {
2108 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2109 ev_set_priority (&fs_w, EV_MAXPRI);
2110 ev_io_start (EV_A_ &fs_w);
2111 }
2112}
2113
2114void inline_size
2115infy_fork (EV_P)
2116{
2117 int slot;
2118
2119 if (fs_fd < 0)
2120 return;
2121
2122 close (fs_fd);
2123 fs_fd = inotify_init ();
2124
2125 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2126 {
2127 WL w_ = fs_hash [slot].head;
2128 fs_hash [slot].head = 0;
2129
2130 while (w_)
2131 {
2132 ev_stat *w = (ev_stat *)w_;
2133 w_ = w_->next; /* lets us add this watcher */
2134
2135 w->wd = -1;
2136
2137 if (fs_fd >= 0)
2138 infy_add (EV_A_ w); /* re-add, no matter what */
2139 else
2140 ev_timer_start (EV_A_ &w->timer);
2141 }
2142
2143 }
2144}
2145
2146#endif
2147
922void 2148void
2149ev_stat_stat (EV_P_ ev_stat *w)
2150{
2151 if (lstat (w->path, &w->attr) < 0)
2152 w->attr.st_nlink = 0;
2153 else if (!w->attr.st_nlink)
2154 w->attr.st_nlink = 1;
2155}
2156
2157static void noinline
2158stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2159{
2160 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2161
2162 /* we copy this here each the time so that */
2163 /* prev has the old value when the callback gets invoked */
2164 w->prev = w->attr;
2165 ev_stat_stat (EV_A_ w);
2166
2167 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2168 if (
2169 w->prev.st_dev != w->attr.st_dev
2170 || w->prev.st_ino != w->attr.st_ino
2171 || w->prev.st_mode != w->attr.st_mode
2172 || w->prev.st_nlink != w->attr.st_nlink
2173 || w->prev.st_uid != w->attr.st_uid
2174 || w->prev.st_gid != w->attr.st_gid
2175 || w->prev.st_rdev != w->attr.st_rdev
2176 || w->prev.st_size != w->attr.st_size
2177 || w->prev.st_atime != w->attr.st_atime
2178 || w->prev.st_mtime != w->attr.st_mtime
2179 || w->prev.st_ctime != w->attr.st_ctime
2180 ) {
2181 #if EV_USE_INOTIFY
2182 infy_del (EV_A_ w);
2183 infy_add (EV_A_ w);
2184 ev_stat_stat (EV_A_ w); /* avoid race... */
2185 #endif
2186
2187 ev_feed_event (EV_A_ w, EV_STAT);
2188 }
2189}
2190
2191void
2192ev_stat_start (EV_P_ ev_stat *w)
2193{
2194 if (expect_false (ev_is_active (w)))
2195 return;
2196
2197 /* since we use memcmp, we need to clear any padding data etc. */
2198 memset (&w->prev, 0, sizeof (ev_statdata));
2199 memset (&w->attr, 0, sizeof (ev_statdata));
2200
2201 ev_stat_stat (EV_A_ w);
2202
2203 if (w->interval < MIN_STAT_INTERVAL)
2204 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2205
2206 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2207 ev_set_priority (&w->timer, ev_priority (w));
2208
2209#if EV_USE_INOTIFY
2210 infy_init (EV_A);
2211
2212 if (fs_fd >= 0)
2213 infy_add (EV_A_ w);
2214 else
2215#endif
2216 ev_timer_start (EV_A_ &w->timer);
2217
2218 ev_start (EV_A_ (W)w, 1);
2219}
2220
2221void
2222ev_stat_stop (EV_P_ ev_stat *w)
2223{
2224 clear_pending (EV_A_ (W)w);
2225 if (expect_false (!ev_is_active (w)))
2226 return;
2227
2228#if EV_USE_INOTIFY
2229 infy_del (EV_A_ w);
2230#endif
2231 ev_timer_stop (EV_A_ &w->timer);
2232
2233 ev_stop (EV_A_ (W)w);
2234}
2235#endif
2236
2237#if EV_IDLE_ENABLE
2238void
2239ev_idle_start (EV_P_ ev_idle *w)
2240{
2241 if (expect_false (ev_is_active (w)))
2242 return;
2243
2244 pri_adjust (EV_A_ (W)w);
2245
2246 {
2247 int active = ++idlecnt [ABSPRI (w)];
2248
2249 ++idleall;
2250 ev_start (EV_A_ (W)w, active);
2251
2252 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2253 idles [ABSPRI (w)][active - 1] = w;
2254 }
2255}
2256
2257void
2258ev_idle_stop (EV_P_ ev_idle *w)
2259{
2260 clear_pending (EV_A_ (W)w);
2261 if (expect_false (!ev_is_active (w)))
2262 return;
2263
2264 {
2265 int active = ((W)w)->active;
2266
2267 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2268 ((W)idles [ABSPRI (w)][active - 1])->active = active;
2269
2270 ev_stop (EV_A_ (W)w);
2271 --idleall;
2272 }
2273}
2274#endif
2275
2276void
923ev_prepare_start (struct ev_prepare *w) 2277ev_prepare_start (EV_P_ ev_prepare *w)
924{ 2278{
925 if (ev_is_active (w)) 2279 if (expect_false (ev_is_active (w)))
926 return; 2280 return;
927 2281
928 ev_start ((W)w, ++preparecnt); 2282 ev_start (EV_A_ (W)w, ++preparecnt);
929 array_needsize (prepares, preparemax, preparecnt, ); 2283 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
930 prepares [preparecnt - 1] = w; 2284 prepares [preparecnt - 1] = w;
931} 2285}
932 2286
933void 2287void
934ev_prepare_stop (struct ev_prepare *w) 2288ev_prepare_stop (EV_P_ ev_prepare *w)
935{ 2289{
936 ev_clear ((W)w); 2290 clear_pending (EV_A_ (W)w);
937 if (ev_is_active (w)) 2291 if (expect_false (!ev_is_active (w)))
938 return; 2292 return;
939 2293
2294 {
2295 int active = ((W)w)->active;
940 prepares [w->active - 1] = prepares [--preparecnt]; 2296 prepares [active - 1] = prepares [--preparecnt];
2297 ((W)prepares [active - 1])->active = active;
2298 }
2299
941 ev_stop ((W)w); 2300 ev_stop (EV_A_ (W)w);
942} 2301}
943 2302
944void 2303void
945ev_check_start (struct ev_check *w) 2304ev_check_start (EV_P_ ev_check *w)
946{ 2305{
947 if (ev_is_active (w)) 2306 if (expect_false (ev_is_active (w)))
948 return; 2307 return;
949 2308
950 ev_start ((W)w, ++checkcnt); 2309 ev_start (EV_A_ (W)w, ++checkcnt);
951 array_needsize (checks, checkmax, checkcnt, ); 2310 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
952 checks [checkcnt - 1] = w; 2311 checks [checkcnt - 1] = w;
953} 2312}
954 2313
955void 2314void
956ev_check_stop (struct ev_check *w) 2315ev_check_stop (EV_P_ ev_check *w)
957{ 2316{
958 ev_clear ((W)w); 2317 clear_pending (EV_A_ (W)w);
959 if (ev_is_active (w)) 2318 if (expect_false (!ev_is_active (w)))
960 return; 2319 return;
961 2320
2321 {
2322 int active = ((W)w)->active;
962 checks [w->active - 1] = checks [--checkcnt]; 2323 checks [active - 1] = checks [--checkcnt];
2324 ((W)checks [active - 1])->active = active;
2325 }
2326
963 ev_stop ((W)w); 2327 ev_stop (EV_A_ (W)w);
964} 2328}
965 2329
966void 2330#if EV_EMBED_ENABLE
967ev_child_start (struct ev_child *w) 2331void noinline
2332ev_embed_sweep (EV_P_ ev_embed *w)
968{ 2333{
2334 ev_loop (w->other, EVLOOP_NONBLOCK);
2335}
2336
2337static void
2338embed_io_cb (EV_P_ ev_io *io, int revents)
2339{
2340 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2341
969 if (ev_is_active (w)) 2342 if (ev_cb (w))
970 return; 2343 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2344 else
2345 ev_loop (w->other, EVLOOP_NONBLOCK);
2346}
971 2347
2348static void
2349embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2350{
2351 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2352
2353 {
2354 struct ev_loop *loop = w->other;
2355
2356 while (fdchangecnt)
2357 {
2358 fd_reify (EV_A);
2359 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2360 }
2361 }
2362}
2363
2364#if 0
2365static void
2366embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2367{
2368 ev_idle_stop (EV_A_ idle);
2369}
2370#endif
2371
2372void
2373ev_embed_start (EV_P_ ev_embed *w)
2374{
2375 if (expect_false (ev_is_active (w)))
2376 return;
2377
2378 {
2379 struct ev_loop *loop = w->other;
2380 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2381 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2382 }
2383
2384 ev_set_priority (&w->io, ev_priority (w));
2385 ev_io_start (EV_A_ &w->io);
2386
2387 ev_prepare_init (&w->prepare, embed_prepare_cb);
2388 ev_set_priority (&w->prepare, EV_MINPRI);
2389 ev_prepare_start (EV_A_ &w->prepare);
2390
2391 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2392
972 ev_start ((W)w, 1); 2393 ev_start (EV_A_ (W)w, 1);
973 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
974} 2394}
975 2395
976void 2396void
977ev_child_stop (struct ev_child *w) 2397ev_embed_stop (EV_P_ ev_embed *w)
978{ 2398{
979 ev_clear ((W)w); 2399 clear_pending (EV_A_ (W)w);
980 if (ev_is_active (w)) 2400 if (expect_false (!ev_is_active (w)))
981 return; 2401 return;
982 2402
983 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2403 ev_io_stop (EV_A_ &w->io);
2404 ev_prepare_stop (EV_A_ &w->prepare);
2405
984 ev_stop ((W)w); 2406 ev_stop (EV_A_ (W)w);
985} 2407}
2408#endif
2409
2410#if EV_FORK_ENABLE
2411void
2412ev_fork_start (EV_P_ ev_fork *w)
2413{
2414 if (expect_false (ev_is_active (w)))
2415 return;
2416
2417 ev_start (EV_A_ (W)w, ++forkcnt);
2418 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2419 forks [forkcnt - 1] = w;
2420}
2421
2422void
2423ev_fork_stop (EV_P_ ev_fork *w)
2424{
2425 clear_pending (EV_A_ (W)w);
2426 if (expect_false (!ev_is_active (w)))
2427 return;
2428
2429 {
2430 int active = ((W)w)->active;
2431 forks [active - 1] = forks [--forkcnt];
2432 ((W)forks [active - 1])->active = active;
2433 }
2434
2435 ev_stop (EV_A_ (W)w);
2436}
2437#endif
2438
2439#if EV_ASYNC_ENABLE
2440void
2441ev_async_start (EV_P_ ev_async *w)
2442{
2443 if (expect_false (ev_is_active (w)))
2444 return;
2445
2446 evpipe_init (EV_A);
2447
2448 ev_start (EV_A_ (W)w, ++asynccnt);
2449 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2450 asyncs [asynccnt - 1] = w;
2451}
2452
2453void
2454ev_async_stop (EV_P_ ev_async *w)
2455{
2456 clear_pending (EV_A_ (W)w);
2457 if (expect_false (!ev_is_active (w)))
2458 return;
2459
2460 {
2461 int active = ((W)w)->active;
2462 asyncs [active - 1] = asyncs [--asynccnt];
2463 ((W)asyncs [active - 1])->active = active;
2464 }
2465
2466 ev_stop (EV_A_ (W)w);
2467}
2468
2469void
2470ev_async_send (EV_P_ ev_async *w)
2471{
2472 w->sent = 1;
2473 evpipe_write (EV_A_ 0, 1);
2474}
2475#endif
986 2476
987/*****************************************************************************/ 2477/*****************************************************************************/
988 2478
989struct ev_once 2479struct ev_once
990{ 2480{
991 struct ev_io io; 2481 ev_io io;
992 struct ev_timer to; 2482 ev_timer to;
993 void (*cb)(int revents, void *arg); 2483 void (*cb)(int revents, void *arg);
994 void *arg; 2484 void *arg;
995}; 2485};
996 2486
997static void 2487static void
998once_cb (struct ev_once *once, int revents) 2488once_cb (EV_P_ struct ev_once *once, int revents)
999{ 2489{
1000 void (*cb)(int revents, void *arg) = once->cb; 2490 void (*cb)(int revents, void *arg) = once->cb;
1001 void *arg = once->arg; 2491 void *arg = once->arg;
1002 2492
1003 ev_io_stop (&once->io); 2493 ev_io_stop (EV_A_ &once->io);
1004 ev_timer_stop (&once->to); 2494 ev_timer_stop (EV_A_ &once->to);
1005 free (once); 2495 ev_free (once);
1006 2496
1007 cb (revents, arg); 2497 cb (revents, arg);
1008} 2498}
1009 2499
1010static void 2500static void
1011once_cb_io (struct ev_io *w, int revents) 2501once_cb_io (EV_P_ ev_io *w, int revents)
1012{ 2502{
1013 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2503 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1014} 2504}
1015 2505
1016static void 2506static void
1017once_cb_to (struct ev_timer *w, int revents) 2507once_cb_to (EV_P_ ev_timer *w, int revents)
1018{ 2508{
1019 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2509 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1020} 2510}
1021 2511
1022void 2512void
1023ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2513ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1024{ 2514{
1025 struct ev_once *once = malloc (sizeof (struct ev_once)); 2515 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1026 2516
1027 if (!once) 2517 if (expect_false (!once))
2518 {
1028 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 2519 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1029 else 2520 return;
1030 { 2521 }
2522
1031 once->cb = cb; 2523 once->cb = cb;
1032 once->arg = arg; 2524 once->arg = arg;
1033 2525
1034 ev_watcher_init (&once->io, once_cb_io); 2526 ev_init (&once->io, once_cb_io);
1035 if (fd >= 0) 2527 if (fd >= 0)
1036 { 2528 {
1037 ev_io_set (&once->io, fd, events); 2529 ev_io_set (&once->io, fd, events);
1038 ev_io_start (&once->io); 2530 ev_io_start (EV_A_ &once->io);
1039 } 2531 }
1040 2532
1041 ev_watcher_init (&once->to, once_cb_to); 2533 ev_init (&once->to, once_cb_to);
1042 if (timeout >= 0.) 2534 if (timeout >= 0.)
1043 { 2535 {
1044 ev_timer_set (&once->to, timeout, 0.); 2536 ev_timer_set (&once->to, timeout, 0.);
1045 ev_timer_start (&once->to); 2537 ev_timer_start (EV_A_ &once->to);
1046 }
1047 }
1048}
1049
1050/*****************************************************************************/
1051
1052#if 0
1053
1054struct ev_io wio;
1055
1056static void
1057sin_cb (struct ev_io *w, int revents)
1058{
1059 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1060}
1061
1062static void
1063ocb (struct ev_timer *w, int revents)
1064{
1065 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1066 ev_timer_stop (w);
1067 ev_timer_start (w);
1068}
1069
1070static void
1071scb (struct ev_signal *w, int revents)
1072{
1073 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1074 ev_io_stop (&wio);
1075 ev_io_start (&wio);
1076}
1077
1078static void
1079gcb (struct ev_signal *w, int revents)
1080{
1081 fprintf (stderr, "generic %x\n", revents);
1082
1083}
1084
1085int main (void)
1086{
1087 ev_init (0);
1088
1089 ev_io_init (&wio, sin_cb, 0, EV_READ);
1090 ev_io_start (&wio);
1091
1092 struct ev_timer t[10000];
1093
1094#if 0
1095 int i;
1096 for (i = 0; i < 10000; ++i)
1097 { 2538 }
1098 struct ev_timer *w = t + i;
1099 ev_watcher_init (w, ocb, i);
1100 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1101 ev_timer_start (w);
1102 if (drand48 () < 0.5)
1103 ev_timer_stop (w);
1104 }
1105#endif
1106
1107 struct ev_timer t1;
1108 ev_timer_init (&t1, ocb, 5, 10);
1109 ev_timer_start (&t1);
1110
1111 struct ev_signal sig;
1112 ev_signal_init (&sig, scb, SIGQUIT);
1113 ev_signal_start (&sig);
1114
1115 struct ev_check cw;
1116 ev_check_init (&cw, gcb);
1117 ev_check_start (&cw);
1118
1119 struct ev_idle iw;
1120 ev_idle_init (&iw, gcb);
1121 ev_idle_start (&iw);
1122
1123 ev_loop (0);
1124
1125 return 0;
1126} 2539}
1127 2540
2541#if EV_MULTIPLICITY
2542 #include "ev_wrap.h"
1128#endif 2543#endif
1129 2544
2545#ifdef __cplusplus
2546}
2547#endif
1130 2548
1131
1132

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