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Comparing libev/ev.c (file contents):
Revision 1.31 by root, Thu Nov 1 09:05:33 2007 UTC vs.
Revision 1.238 by root, Thu May 8 20:49:12 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/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE
29#if EV_USE_CONFIG_H 46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
30# include "config.h" 49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC
54# define EV_USE_MONOTONIC 1
55# endif
56# ifndef EV_USE_REALTIME
57# define EV_USE_REALTIME 1
58# endif
59# else
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0
62# endif
63# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0
65# endif
66# endif
67
68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
73# endif
74# endif
75
76# ifndef EV_USE_SELECT
77# if HAVE_SELECT && HAVE_SYS_SELECT_H
78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif
82# endif
83
84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
86# define EV_USE_POLL 1
87# else
88# define EV_USE_POLL 0
89# endif
90# endif
91
92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94# define EV_USE_EPOLL 1
95# else
96# define EV_USE_EPOLL 0
97# endif
98# endif
99
100# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif
106# endif
107
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1
111# else
112# define EV_USE_PORT 0
113# endif
114# endif
115
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1
119# else
120# define EV_USE_INOTIFY 0
121# endif
122# endif
123
124# ifndef EV_USE_EVENTFD
125# if HAVE_EVENTFD
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif
130# endif
131
31#endif 132#endif
32 133
33#include <math.h> 134#include <math.h>
34#include <stdlib.h> 135#include <stdlib.h>
35#include <unistd.h>
36#include <fcntl.h> 136#include <fcntl.h>
37#include <signal.h>
38#include <stddef.h> 137#include <stddef.h>
39 138
40#include <stdio.h> 139#include <stdio.h>
41 140
42#include <assert.h> 141#include <assert.h>
43#include <errno.h> 142#include <errno.h>
44#include <sys/types.h> 143#include <sys/types.h>
45#include <sys/wait.h>
46#include <sys/time.h>
47#include <time.h> 144#include <time.h>
48 145
146#include <signal.h>
147
148#ifdef EV_H
149# include EV_H
150#else
151# include "ev.h"
152#endif
153
154#ifndef _WIN32
155# include <sys/time.h>
156# include <sys/wait.h>
157# include <unistd.h>
158#else
159# define WIN32_LEAN_AND_MEAN
160# include <windows.h>
161# ifndef EV_SELECT_IS_WINSOCKET
162# define EV_SELECT_IS_WINSOCKET 1
163# endif
164#endif
165
166/* this block tries to deduce configuration from header-defined symbols and defaults */
167
49#ifndef EV_USE_MONOTONIC 168#ifndef EV_USE_MONOTONIC
50# ifdef CLOCK_MONOTONIC
51# define EV_USE_MONOTONIC 1 169# define EV_USE_MONOTONIC 0
52# endif 170#endif
171
172#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0
174#endif
175
176#ifndef EV_USE_NANOSLEEP
177# define EV_USE_NANOSLEEP 0
53#endif 178#endif
54 179
55#ifndef EV_USE_SELECT 180#ifndef EV_USE_SELECT
56# define EV_USE_SELECT 1 181# define EV_USE_SELECT 1
57#endif 182#endif
58 183
184#ifndef EV_USE_POLL
185# ifdef _WIN32
186# define EV_USE_POLL 0
187# else
188# define EV_USE_POLL 1
189# endif
190#endif
191
59#ifndef EV_USE_EPOLL 192#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1
195# else
60# define EV_USE_EPOLL 0 196# define EV_USE_EPOLL 0
197# endif
198#endif
199
200#ifndef EV_USE_KQUEUE
201# define EV_USE_KQUEUE 0
202#endif
203
204#ifndef EV_USE_PORT
205# define EV_USE_PORT 0
206#endif
207
208#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1
211# else
212# define EV_USE_INOTIFY 0
213# endif
214#endif
215
216#ifndef EV_PID_HASHSIZE
217# if EV_MINIMAL
218# define EV_PID_HASHSIZE 1
219# else
220# define EV_PID_HASHSIZE 16
221# endif
222#endif
223
224#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL
226# define EV_INOTIFY_HASHSIZE 1
227# else
228# define EV_INOTIFY_HASHSIZE 16
229# endif
230#endif
231
232#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1
235# else
236# define EV_USE_EVENTFD 0
237# endif
238#endif
239
240/* this block fixes any misconfiguration where we know we run into trouble otherwise */
241
242#ifndef CLOCK_MONOTONIC
243# undef EV_USE_MONOTONIC
244# define EV_USE_MONOTONIC 0
61#endif 245#endif
62 246
63#ifndef CLOCK_REALTIME 247#ifndef CLOCK_REALTIME
248# undef EV_USE_REALTIME
64# define EV_USE_REALTIME 0 249# define EV_USE_REALTIME 0
65#endif 250#endif
66#ifndef EV_USE_REALTIME 251
67# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */ 252#if !EV_STAT_ENABLE
253# undef EV_USE_INOTIFY
254# define EV_USE_INOTIFY 0
255#endif
256
257#if !EV_USE_NANOSLEEP
258# ifndef _WIN32
259# include <sys/select.h>
68#endif 260# endif
261#endif
262
263#if EV_USE_INOTIFY
264# include <sys/inotify.h>
265#endif
266
267#if EV_SELECT_IS_WINSOCKET
268# include <winsock.h>
269#endif
270
271#if EV_USE_EVENTFD
272/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
273# include <stdint.h>
274# ifdef __cplusplus
275extern "C" {
276# endif
277int eventfd (unsigned int initval, int flags);
278# ifdef __cplusplus
279}
280# endif
281#endif
282
283/**/
284
285/*
286 * This is used to avoid floating point rounding problems.
287 * It is added to ev_rt_now when scheduling periodics
288 * to ensure progress, time-wise, even when rounding
289 * errors are against us.
290 * This value is good at least till the year 4000.
291 * Better solutions welcome.
292 */
293#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
69 294
70#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 295#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
71#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */ 296#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
72#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
73#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */ 297/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
74 298
75#include "ev.h" 299#if __GNUC__ >= 4
300# define expect(expr,value) __builtin_expect ((expr),(value))
301# define noinline __attribute__ ((noinline))
302#else
303# define expect(expr,value) (expr)
304# define noinline
305# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
306# define inline
307# endif
308#endif
76 309
310#define expect_false(expr) expect ((expr) != 0, 0)
311#define expect_true(expr) expect ((expr) != 0, 1)
312#define inline_size static inline
313
314#if EV_MINIMAL
315# define inline_speed static noinline
316#else
317# define inline_speed static inline
318#endif
319
320#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
321#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
322
323#define EMPTY /* required for microsofts broken pseudo-c compiler */
324#define EMPTY2(a,b) /* used to suppress some warnings */
325
77typedef struct ev_watcher *W; 326typedef ev_watcher *W;
78typedef struct ev_watcher_list *WL; 327typedef ev_watcher_list *WL;
79typedef struct ev_watcher_time *WT; 328typedef ev_watcher_time *WT;
80 329
81static ev_tstamp now, diff; /* monotonic clock */ 330#define ev_active(w) ((W)(w))->active
331#define ev_at(w) ((WT)(w))->at
332
333#if EV_USE_MONOTONIC
334/* sig_atomic_t is used to avoid per-thread variables or locking but still */
335/* giving it a reasonably high chance of working on typical architetcures */
336static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
337#endif
338
339#ifdef _WIN32
340# include "ev_win32.c"
341#endif
342
343/*****************************************************************************/
344
345static void (*syserr_cb)(const char *msg);
346
347void
348ev_set_syserr_cb (void (*cb)(const char *msg))
349{
350 syserr_cb = cb;
351}
352
353static void noinline
354syserr (const char *msg)
355{
356 if (!msg)
357 msg = "(libev) system error";
358
359 if (syserr_cb)
360 syserr_cb (msg);
361 else
362 {
363 perror (msg);
364 abort ();
365 }
366}
367
368static void *
369ev_realloc_emul (void *ptr, long size)
370{
371 /* some systems, notably openbsd and darwin, fail to properly
372 * implement realloc (x, 0) (as required by both ansi c-98 and
373 * the single unix specification, so work around them here.
374 */
375
376 if (size)
377 return realloc (ptr, size);
378
379 free (ptr);
380 return 0;
381}
382
383static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
384
385void
386ev_set_allocator (void *(*cb)(void *ptr, long size))
387{
388 alloc = cb;
389}
390
391inline_speed void *
392ev_realloc (void *ptr, long size)
393{
394 ptr = alloc (ptr, size);
395
396 if (!ptr && size)
397 {
398 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
399 abort ();
400 }
401
402 return ptr;
403}
404
405#define ev_malloc(size) ev_realloc (0, (size))
406#define ev_free(ptr) ev_realloc ((ptr), 0)
407
408/*****************************************************************************/
409
410typedef struct
411{
412 WL head;
413 unsigned char events;
414 unsigned char reify;
415#if EV_SELECT_IS_WINSOCKET
416 SOCKET handle;
417#endif
418} ANFD;
419
420typedef struct
421{
422 W w;
423 int events;
424} ANPENDING;
425
426#if EV_USE_INOTIFY
427typedef struct
428{
429 WL head;
430} ANFS;
431#endif
432
433#if EV_MULTIPLICITY
434
435 struct ev_loop
436 {
437 ev_tstamp ev_rt_now;
438 #define ev_rt_now ((loop)->ev_rt_now)
439 #define VAR(name,decl) decl;
440 #include "ev_vars.h"
441 #undef VAR
442 };
443 #include "ev_wrap.h"
444
445 static struct ev_loop default_loop_struct;
446 struct ev_loop *ev_default_loop_ptr;
447
448#else
449
82ev_tstamp ev_now; 450 ev_tstamp ev_rt_now;
83int ev_method; 451 #define VAR(name,decl) static decl;
452 #include "ev_vars.h"
453 #undef VAR
84 454
85static int have_monotonic; /* runtime */ 455 static int ev_default_loop_ptr;
86 456
87static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 457#endif
88static void (*method_modify)(int fd, int oev, int nev);
89static void (*method_poll)(ev_tstamp timeout);
90 458
91/*****************************************************************************/ 459/*****************************************************************************/
92 460
93ev_tstamp 461ev_tstamp
94ev_time (void) 462ev_time (void)
… …
102 gettimeofday (&tv, 0); 470 gettimeofday (&tv, 0);
103 return tv.tv_sec + tv.tv_usec * 1e-6; 471 return tv.tv_sec + tv.tv_usec * 1e-6;
104#endif 472#endif
105} 473}
106 474
107static ev_tstamp 475ev_tstamp inline_size
108get_clock (void) 476get_clock (void)
109{ 477{
110#if EV_USE_MONOTONIC 478#if EV_USE_MONOTONIC
111 if (have_monotonic) 479 if (expect_true (have_monotonic))
112 { 480 {
113 struct timespec ts; 481 struct timespec ts;
114 clock_gettime (CLOCK_MONOTONIC, &ts); 482 clock_gettime (CLOCK_MONOTONIC, &ts);
115 return ts.tv_sec + ts.tv_nsec * 1e-9; 483 return ts.tv_sec + ts.tv_nsec * 1e-9;
116 } 484 }
117#endif 485#endif
118 486
119 return ev_time (); 487 return ev_time ();
120} 488}
121 489
122#define array_roundsize(base,n) ((n) | 4 & ~3) 490#if EV_MULTIPLICITY
491ev_tstamp
492ev_now (EV_P)
493{
494 return ev_rt_now;
495}
496#endif
123 497
124#define array_needsize(base,cur,cnt,init) \ 498void
125 if ((cnt) > cur) \ 499ev_sleep (ev_tstamp delay)
126 { \ 500{
127 int newcnt = cur; \ 501 if (delay > 0.)
128 do \
129 { \
130 newcnt = array_roundsize (base, newcnt << 1); \
131 } \
132 while ((cnt) > newcnt); \
133 \
134 base = realloc (base, sizeof (*base) * (newcnt)); \
135 init (base + cur, newcnt - cur); \
136 cur = newcnt; \
137 } 502 {
503#if EV_USE_NANOSLEEP
504 struct timespec ts;
505
506 ts.tv_sec = (time_t)delay;
507 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
508
509 nanosleep (&ts, 0);
510#elif defined(_WIN32)
511 Sleep ((unsigned long)(delay * 1e3));
512#else
513 struct timeval tv;
514
515 tv.tv_sec = (time_t)delay;
516 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
517
518 select (0, 0, 0, 0, &tv);
519#endif
520 }
521}
138 522
139/*****************************************************************************/ 523/*****************************************************************************/
140 524
141typedef struct 525#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
142{
143 struct ev_io *head;
144 int events;
145} ANFD;
146 526
147static ANFD *anfds; 527int inline_size
148static int anfdmax; 528array_nextsize (int elem, int cur, int cnt)
529{
530 int ncur = cur + 1;
149 531
150static void 532 do
533 ncur <<= 1;
534 while (cnt > ncur);
535
536 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
537 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
538 {
539 ncur *= elem;
540 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
541 ncur = ncur - sizeof (void *) * 4;
542 ncur /= elem;
543 }
544
545 return ncur;
546}
547
548static noinline void *
549array_realloc (int elem, void *base, int *cur, int cnt)
550{
551 *cur = array_nextsize (elem, *cur, cnt);
552 return ev_realloc (base, elem * *cur);
553}
554
555#define array_needsize(type,base,cur,cnt,init) \
556 if (expect_false ((cnt) > (cur))) \
557 { \
558 int ocur_ = (cur); \
559 (base) = (type *)array_realloc \
560 (sizeof (type), (base), &(cur), (cnt)); \
561 init ((base) + (ocur_), (cur) - ocur_); \
562 }
563
564#if 0
565#define array_slim(type,stem) \
566 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
567 { \
568 stem ## max = array_roundsize (stem ## cnt >> 1); \
569 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
570 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
571 }
572#endif
573
574#define array_free(stem, idx) \
575 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
576
577/*****************************************************************************/
578
579void noinline
580ev_feed_event (EV_P_ void *w, int revents)
581{
582 W w_ = (W)w;
583 int pri = ABSPRI (w_);
584
585 if (expect_false (w_->pending))
586 pendings [pri][w_->pending - 1].events |= revents;
587 else
588 {
589 w_->pending = ++pendingcnt [pri];
590 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
591 pendings [pri][w_->pending - 1].w = w_;
592 pendings [pri][w_->pending - 1].events = revents;
593 }
594}
595
596void inline_speed
597queue_events (EV_P_ W *events, int eventcnt, int type)
598{
599 int i;
600
601 for (i = 0; i < eventcnt; ++i)
602 ev_feed_event (EV_A_ events [i], type);
603}
604
605/*****************************************************************************/
606
607void inline_size
151anfds_init (ANFD *base, int count) 608anfds_init (ANFD *base, int count)
152{ 609{
153 while (count--) 610 while (count--)
154 { 611 {
155 base->head = 0; 612 base->head = 0;
156 base->events = EV_NONE; 613 base->events = EV_NONE;
614 base->reify = 0;
615
157 ++base; 616 ++base;
158 } 617 }
159} 618}
160 619
161typedef struct 620void inline_speed
162{
163 W w;
164 int events;
165} ANPENDING;
166
167static ANPENDING *pendings;
168static int pendingmax, pendingcnt;
169
170static void
171event (W w, int events)
172{
173 w->pending = ++pendingcnt;
174 array_needsize (pendings, pendingmax, pendingcnt, );
175 pendings [pendingcnt - 1].w = w;
176 pendings [pendingcnt - 1].events = events;
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) 621fd_event (EV_P_ int fd, int revents)
190{ 622{
191 ANFD *anfd = anfds + fd; 623 ANFD *anfd = anfds + fd;
192 struct ev_io *w; 624 ev_io *w;
193 625
194 for (w = anfd->head; w; w = w->next) 626 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
195 { 627 {
196 int ev = w->events & events; 628 int ev = w->events & revents;
197 629
198 if (ev) 630 if (ev)
199 event ((W)w, ev); 631 ev_feed_event (EV_A_ (W)w, ev);
200 } 632 }
201} 633}
202 634
203/*****************************************************************************/ 635void
636ev_feed_fd_event (EV_P_ int fd, int revents)
637{
638 if (fd >= 0 && fd < anfdmax)
639 fd_event (EV_A_ fd, revents);
640}
204 641
205static int *fdchanges; 642void inline_size
206static int fdchangemax, fdchangecnt; 643fd_reify (EV_P)
207
208static void
209fd_reify (void)
210{ 644{
211 int i; 645 int i;
212 646
213 for (i = 0; i < fdchangecnt; ++i) 647 for (i = 0; i < fdchangecnt; ++i)
214 { 648 {
215 int fd = fdchanges [i]; 649 int fd = fdchanges [i];
216 ANFD *anfd = anfds + fd; 650 ANFD *anfd = anfds + fd;
217 struct ev_io *w; 651 ev_io *w;
218 652
219 int events = 0; 653 unsigned char events = 0;
220 654
221 for (w = anfd->head; w; w = w->next) 655 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
222 events |= w->events; 656 events |= (unsigned char)w->events;
223 657
224 anfd->events &= ~EV_REIFY; 658#if EV_SELECT_IS_WINSOCKET
225 659 if (events)
226 if (anfd->events != events)
227 { 660 {
228 method_modify (fd, anfd->events, events); 661 unsigned long argp;
229 anfd->events = events; 662 #ifdef EV_FD_TO_WIN32_HANDLE
663 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
664 #else
665 anfd->handle = _get_osfhandle (fd);
666 #endif
667 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
230 } 668 }
669#endif
670
671 {
672 unsigned char o_events = anfd->events;
673 unsigned char o_reify = anfd->reify;
674
675 anfd->reify = 0;
676 anfd->events = events;
677
678 if (o_events != events || o_reify & EV_IOFDSET)
679 backend_modify (EV_A_ fd, o_events, events);
680 }
231 } 681 }
232 682
233 fdchangecnt = 0; 683 fdchangecnt = 0;
234} 684}
235 685
236static void 686void inline_size
237fd_change (int fd) 687fd_change (EV_P_ int fd, int flags)
238{ 688{
239 if (anfds [fd].events & EV_REIFY || fdchangecnt < 0) 689 unsigned char reify = anfds [fd].reify;
240 return; 690 anfds [fd].reify |= flags;
241 691
242 anfds [fd].events |= EV_REIFY; 692 if (expect_true (!reify))
243 693 {
244 ++fdchangecnt; 694 ++fdchangecnt;
245 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 695 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
246 fdchanges [fdchangecnt - 1] = fd; 696 fdchanges [fdchangecnt - 1] = fd;
697 }
698}
699
700void inline_speed
701fd_kill (EV_P_ int fd)
702{
703 ev_io *w;
704
705 while ((w = (ev_io *)anfds [fd].head))
706 {
707 ev_io_stop (EV_A_ w);
708 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
709 }
710}
711
712int inline_size
713fd_valid (int fd)
714{
715#ifdef _WIN32
716 return _get_osfhandle (fd) != -1;
717#else
718 return fcntl (fd, F_GETFD) != -1;
719#endif
247} 720}
248 721
249/* called on EBADF to verify fds */ 722/* called on EBADF to verify fds */
250static void 723static void noinline
251fd_recheck (void) 724fd_ebadf (EV_P)
252{ 725{
253 int fd; 726 int fd;
254 727
255 for (fd = 0; fd < anfdmax; ++fd) 728 for (fd = 0; fd < anfdmax; ++fd)
256 if (anfds [fd].events) 729 if (anfds [fd].events)
257 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 730 if (!fd_valid (fd) == -1 && errno == EBADF)
258 while (anfds [fd].head) 731 fd_kill (EV_A_ fd);
732}
733
734/* called on ENOMEM in select/poll to kill some fds and retry */
735static void noinline
736fd_enomem (EV_P)
737{
738 int fd;
739
740 for (fd = anfdmax; fd--; )
741 if (anfds [fd].events)
259 { 742 {
260 event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT); 743 fd_kill (EV_A_ fd);
261 ev_io_stop (anfds [fd].head); 744 return;
262 } 745 }
746}
747
748/* usually called after fork if backend needs to re-arm all fds from scratch */
749static void noinline
750fd_rearm_all (EV_P)
751{
752 int fd;
753
754 for (fd = 0; fd < anfdmax; ++fd)
755 if (anfds [fd].events)
756 {
757 anfds [fd].events = 0;
758 fd_change (EV_A_ fd, EV_IOFDSET | 1);
759 }
263} 760}
264 761
265/*****************************************************************************/ 762/*****************************************************************************/
266 763
267static struct ev_timer **timers; 764/*
268static int timermax, timercnt; 765 * at the moment we allow libev the luxury of two heaps,
766 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
767 * which is more cache-efficient.
768 * the difference is about 5% with 50000+ watchers.
769 */
770#define USE_4HEAP !EV_MINIMAL
771#define USE_4HEAP 1/* they do not work corretcly */
772#if USE_4HEAP
269 773
270static struct ev_periodic **periodics; 774#define DHEAP 4
271static int periodicmax, periodiccnt; 775#define HEAP0 (DHEAP - 1) /* index of first element in heap */
272 776
273static void 777/* towards the root */
778void inline_speed
274upheap (WT *timers, int k) 779upheap (WT *heap, int k)
275{ 780{
276 WT w = timers [k]; 781 WT w = heap [k];
277 782
278 while (k && timers [k >> 1]->at > w->at) 783 for (;;)
279 {
280 timers [k] = timers [k >> 1];
281 timers [k]->active = k + 1;
282 k >>= 1;
283 } 784 {
785 int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
284 786
285 timers [k] = w; 787 if (p == k || heap [p]->at <= w->at)
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;
298
299 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
300 ++j;
301
302 if (w->at <= timers [j]->at)
303 break; 788 break;
304 789
305 timers [k] = timers [j]; 790 heap [k] = heap [p];
306 timers [k]->active = k + 1; 791 ev_active (heap [k]) = k;
307 k = j; 792 k = p;
793 }
794
795 heap [k] = w;
796 ev_active (heap [k]) = k;
797}
798
799/* away from the root */
800void inline_speed
801downheap (WT *heap, int N, int k)
802{
803 WT w = heap [k];
804 WT *E = heap + N + HEAP0;
805
806 for (;;)
308 } 807 {
808 ev_tstamp minat;
809 WT *minpos;
810 WT *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
309 811
812 // find minimum child
813 if (expect_true (pos + DHEAP - 1 < E))
814 {
815 /* fast path */
816 (minpos = pos + 0), (minat = (*minpos)->at);
817 if (pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
818 if (pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
819 if (pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
820 }
821 else
822 {
823 /* slow path */
824 if (pos >= E)
825 break;
826 (minpos = pos + 0), (minat = (*minpos)->at);
827 if (pos + 1 < E && pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
828 if (pos + 2 < E && pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
829 if (pos + 3 < E && pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
830 }
831
832 if (w->at <= minat)
833 break;
834
835 ev_active (*minpos) = k;
836 heap [k] = *minpos;
837
838 k = minpos - heap;
839 }
840
310 timers [k] = w; 841 heap [k] = w;
311 timers [k]->active = k + 1; 842 ev_active (heap [k]) = k;
843}
844
845#else // 4HEAP
846
847#define HEAP0 1
848
849/* towards the root */
850void inline_speed
851upheap (WT *heap, int k)
852{
853 WT w = heap [k];
854
855 for (;;)
856 {
857 int p = k >> 1;
858
859 /* maybe we could use a dummy element at heap [0]? */
860 if (!p || heap [p]->at <= w->at)
861 break;
862
863 heap [k] = heap [p];
864 ev_active (heap [k]) = k;
865 k = p;
866 }
867
868 heap [k] = w;
869 ev_active (heap [k]) = k;
870}
871
872/* away from the root */
873void inline_speed
874downheap (WT *heap, int N, int k)
875{
876 WT w = heap [k];
877
878 for (;;)
879 {
880 int c = k << 1;
881
882 if (c > N)
883 break;
884
885 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
886 ? 1 : 0;
887
888 if (w->at <= heap [c]->at)
889 break;
890
891 heap [k] = heap [c];
892 ((W)heap [k])->active = k;
893
894 k = c;
895 }
896
897 heap [k] = w;
898 ev_active (heap [k]) = k;
899}
900#endif
901
902void inline_size
903adjustheap (WT *heap, int N, int k)
904{
905 upheap (heap, k);
906 downheap (heap, N, k);
312} 907}
313 908
314/*****************************************************************************/ 909/*****************************************************************************/
315 910
316typedef struct 911typedef struct
317{ 912{
318 struct ev_signal *head; 913 WL head;
319 sig_atomic_t gotsig; 914 EV_ATOMIC_T gotsig;
320} ANSIG; 915} ANSIG;
321 916
322static ANSIG *signals; 917static ANSIG *signals;
323static int signalmax; 918static int signalmax;
324 919
325static int sigpipe [2]; 920static EV_ATOMIC_T gotsig;
326static sig_atomic_t gotsig;
327static struct ev_io sigev;
328 921
329static void 922void inline_size
330signals_init (ANSIG *base, int count) 923signals_init (ANSIG *base, int count)
331{ 924{
332 while (count--) 925 while (count--)
333 { 926 {
334 base->head = 0; 927 base->head = 0;
335 base->gotsig = 0; 928 base->gotsig = 0;
929
336 ++base; 930 ++base;
337 } 931 }
338} 932}
339 933
934/*****************************************************************************/
935
936void inline_speed
937fd_intern (int fd)
938{
939#ifdef _WIN32
940 int arg = 1;
941 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
942#else
943 fcntl (fd, F_SETFD, FD_CLOEXEC);
944 fcntl (fd, F_SETFL, O_NONBLOCK);
945#endif
946}
947
948static void noinline
949evpipe_init (EV_P)
950{
951 if (!ev_is_active (&pipeev))
952 {
953#if EV_USE_EVENTFD
954 if ((evfd = eventfd (0, 0)) >= 0)
955 {
956 evpipe [0] = -1;
957 fd_intern (evfd);
958 ev_io_set (&pipeev, evfd, EV_READ);
959 }
960 else
961#endif
962 {
963 while (pipe (evpipe))
964 syserr ("(libev) error creating signal/async pipe");
965
966 fd_intern (evpipe [0]);
967 fd_intern (evpipe [1]);
968 ev_io_set (&pipeev, evpipe [0], EV_READ);
969 }
970
971 ev_io_start (EV_A_ &pipeev);
972 ev_unref (EV_A); /* watcher should not keep loop alive */
973 }
974}
975
976void inline_size
977evpipe_write (EV_P_ EV_ATOMIC_T *flag)
978{
979 if (!*flag)
980 {
981 int old_errno = errno; /* save errno because write might clobber it */
982
983 *flag = 1;
984
985#if EV_USE_EVENTFD
986 if (evfd >= 0)
987 {
988 uint64_t counter = 1;
989 write (evfd, &counter, sizeof (uint64_t));
990 }
991 else
992#endif
993 write (evpipe [1], &old_errno, 1);
994
995 errno = old_errno;
996 }
997}
998
340static void 999static void
1000pipecb (EV_P_ ev_io *iow, int revents)
1001{
1002#if EV_USE_EVENTFD
1003 if (evfd >= 0)
1004 {
1005 uint64_t counter;
1006 read (evfd, &counter, sizeof (uint64_t));
1007 }
1008 else
1009#endif
1010 {
1011 char dummy;
1012 read (evpipe [0], &dummy, 1);
1013 }
1014
1015 if (gotsig && ev_is_default_loop (EV_A))
1016 {
1017 int signum;
1018 gotsig = 0;
1019
1020 for (signum = signalmax; signum--; )
1021 if (signals [signum].gotsig)
1022 ev_feed_signal_event (EV_A_ signum + 1);
1023 }
1024
1025#if EV_ASYNC_ENABLE
1026 if (gotasync)
1027 {
1028 int i;
1029 gotasync = 0;
1030
1031 for (i = asynccnt; i--; )
1032 if (asyncs [i]->sent)
1033 {
1034 asyncs [i]->sent = 0;
1035 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1036 }
1037 }
1038#endif
1039}
1040
1041/*****************************************************************************/
1042
1043static void
341sighandler (int signum) 1044ev_sighandler (int signum)
342{ 1045{
1046#if EV_MULTIPLICITY
1047 struct ev_loop *loop = &default_loop_struct;
1048#endif
1049
1050#if _WIN32
1051 signal (signum, ev_sighandler);
1052#endif
1053
343 signals [signum - 1].gotsig = 1; 1054 signals [signum - 1].gotsig = 1;
344 1055 evpipe_write (EV_A_ &gotsig);
345 if (!gotsig)
346 {
347 gotsig = 1;
348 write (sigpipe [1], &gotsig, 1);
349 }
350} 1056}
351 1057
352static void 1058void noinline
353sigcb (struct ev_io *iow, int revents) 1059ev_feed_signal_event (EV_P_ int signum)
354{ 1060{
355 struct ev_signal *w; 1061 WL w;
356 int sig;
357 1062
358 gotsig = 0; 1063#if EV_MULTIPLICITY
359 read (sigpipe [0], &revents, 1); 1064 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1065#endif
360 1066
361 for (sig = signalmax; sig--; ) 1067 --signum;
362 if (signals [sig].gotsig) 1068
363 { 1069 if (signum < 0 || signum >= signalmax)
1070 return;
1071
364 signals [sig].gotsig = 0; 1072 signals [signum].gotsig = 0;
365 1073
366 for (w = signals [sig].head; w; w = w->next) 1074 for (w = signals [signum].head; w; w = w->next)
367 event ((W)w, EV_SIGNAL); 1075 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} 1076}
384 1077
385/*****************************************************************************/ 1078/*****************************************************************************/
386 1079
387static struct ev_idle **idles; 1080static WL childs [EV_PID_HASHSIZE];
388static int idlemax, idlecnt;
389 1081
390static struct ev_prepare **prepares; 1082#ifndef _WIN32
391static int preparemax, preparecnt;
392 1083
393static struct ev_check **checks;
394static int checkmax, checkcnt;
395
396/*****************************************************************************/
397
398static struct ev_child *childs [PID_HASHSIZE];
399static struct ev_signal childev; 1084static ev_signal childev;
1085
1086#ifndef WIFCONTINUED
1087# define WIFCONTINUED(status) 0
1088#endif
1089
1090void inline_speed
1091child_reap (EV_P_ int chain, int pid, int status)
1092{
1093 ev_child *w;
1094 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1095
1096 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1097 {
1098 if ((w->pid == pid || !w->pid)
1099 && (!traced || (w->flags & 1)))
1100 {
1101 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1102 w->rpid = pid;
1103 w->rstatus = status;
1104 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1105 }
1106 }
1107}
400 1108
401#ifndef WCONTINUED 1109#ifndef WCONTINUED
402# define WCONTINUED 0 1110# define WCONTINUED 0
403#endif 1111#endif
404 1112
405static void 1113static void
406childcb (struct ev_signal *sw, int revents) 1114childcb (EV_P_ ev_signal *sw, int revents)
407{ 1115{
408 struct ev_child *w;
409 int pid, status; 1116 int pid, status;
410 1117
1118 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
411 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1119 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
412 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1120 if (!WCONTINUED
413 if (w->pid == pid || w->pid == -1) 1121 || errno != EINVAL
414 { 1122 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
415 w->status = status; 1123 return;
416 event ((W)w, EV_CHILD); 1124
417 } 1125 /* make sure we are called again until all children have been reaped */
1126 /* we need to do it this way so that the callback gets called before we continue */
1127 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1128
1129 child_reap (EV_A_ pid, pid, status);
1130 if (EV_PID_HASHSIZE > 1)
1131 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
418} 1132}
1133
1134#endif
419 1135
420/*****************************************************************************/ 1136/*****************************************************************************/
421 1137
1138#if EV_USE_PORT
1139# include "ev_port.c"
1140#endif
1141#if EV_USE_KQUEUE
1142# include "ev_kqueue.c"
1143#endif
422#if EV_USE_EPOLL 1144#if EV_USE_EPOLL
423# include "ev_epoll.c" 1145# include "ev_epoll.c"
424#endif 1146#endif
1147#if EV_USE_POLL
1148# include "ev_poll.c"
1149#endif
425#if EV_USE_SELECT 1150#if EV_USE_SELECT
426# include "ev_select.c" 1151# include "ev_select.c"
427#endif 1152#endif
428 1153
429int 1154int
… …
436ev_version_minor (void) 1161ev_version_minor (void)
437{ 1162{
438 return EV_VERSION_MINOR; 1163 return EV_VERSION_MINOR;
439} 1164}
440 1165
441int ev_init (int flags) 1166/* return true if we are running with elevated privileges and should ignore env variables */
1167int inline_size
1168enable_secure (void)
442{ 1169{
443 if (!ev_method) 1170#ifdef _WIN32
1171 return 0;
1172#else
1173 return getuid () != geteuid ()
1174 || getgid () != getegid ();
1175#endif
1176}
1177
1178unsigned int
1179ev_supported_backends (void)
1180{
1181 unsigned int flags = 0;
1182
1183 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1184 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1185 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1186 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1187 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1188
1189 return flags;
1190}
1191
1192unsigned int
1193ev_recommended_backends (void)
1194{
1195 unsigned int flags = ev_supported_backends ();
1196
1197#ifndef __NetBSD__
1198 /* kqueue is borked on everything but netbsd apparently */
1199 /* it usually doesn't work correctly on anything but sockets and pipes */
1200 flags &= ~EVBACKEND_KQUEUE;
1201#endif
1202#ifdef __APPLE__
1203 // flags &= ~EVBACKEND_KQUEUE; for documentation
1204 flags &= ~EVBACKEND_POLL;
1205#endif
1206
1207 return flags;
1208}
1209
1210unsigned int
1211ev_embeddable_backends (void)
1212{
1213 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1214
1215 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1216 /* please fix it and tell me how to detect the fix */
1217 flags &= ~EVBACKEND_EPOLL;
1218
1219 return flags;
1220}
1221
1222unsigned int
1223ev_backend (EV_P)
1224{
1225 return backend;
1226}
1227
1228unsigned int
1229ev_loop_count (EV_P)
1230{
1231 return loop_count;
1232}
1233
1234void
1235ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1236{
1237 io_blocktime = interval;
1238}
1239
1240void
1241ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1242{
1243 timeout_blocktime = interval;
1244}
1245
1246static void noinline
1247loop_init (EV_P_ unsigned int flags)
1248{
1249 if (!backend)
444 { 1250 {
445#if EV_USE_MONOTONIC 1251#if EV_USE_MONOTONIC
446 { 1252 {
447 struct timespec ts; 1253 struct timespec ts;
448 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1254 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
449 have_monotonic = 1; 1255 have_monotonic = 1;
450 } 1256 }
451#endif 1257#endif
452 1258
453 ev_now = ev_time (); 1259 ev_rt_now = ev_time ();
454 now = get_clock (); 1260 mn_now = get_clock ();
1261 now_floor = mn_now;
455 diff = ev_now - now; 1262 rtmn_diff = ev_rt_now - mn_now;
456 1263
457 if (pipe (sigpipe)) 1264 io_blocktime = 0.;
458 return 0; 1265 timeout_blocktime = 0.;
1266 backend = 0;
1267 backend_fd = -1;
1268 gotasync = 0;
1269#if EV_USE_INOTIFY
1270 fs_fd = -2;
1271#endif
459 1272
460 ev_method = EVMETHOD_NONE; 1273 /* pid check not overridable via env */
1274#ifndef _WIN32
1275 if (flags & EVFLAG_FORKCHECK)
1276 curpid = getpid ();
1277#endif
1278
1279 if (!(flags & EVFLAG_NOENV)
1280 && !enable_secure ()
1281 && getenv ("LIBEV_FLAGS"))
1282 flags = atoi (getenv ("LIBEV_FLAGS"));
1283
1284 if (!(flags & 0x0000ffffU))
1285 flags |= ev_recommended_backends ();
1286
1287#if EV_USE_PORT
1288 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1289#endif
1290#if EV_USE_KQUEUE
1291 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1292#endif
461#if EV_USE_EPOLL 1293#if EV_USE_EPOLL
462 if (ev_method == EVMETHOD_NONE) epoll_init (flags); 1294 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1295#endif
1296#if EV_USE_POLL
1297 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
463#endif 1298#endif
464#if EV_USE_SELECT 1299#if EV_USE_SELECT
465 if (ev_method == EVMETHOD_NONE) select_init (flags); 1300 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
466#endif 1301#endif
467 1302
468 if (ev_method) 1303 ev_init (&pipeev, pipecb);
1304 ev_set_priority (&pipeev, EV_MAXPRI);
1305 }
1306}
1307
1308static void noinline
1309loop_destroy (EV_P)
1310{
1311 int i;
1312
1313 if (ev_is_active (&pipeev))
1314 {
1315 ev_ref (EV_A); /* signal watcher */
1316 ev_io_stop (EV_A_ &pipeev);
1317
1318#if EV_USE_EVENTFD
1319 if (evfd >= 0)
1320 close (evfd);
1321#endif
1322
1323 if (evpipe [0] >= 0)
469 { 1324 {
470 ev_watcher_init (&sigev, sigcb); 1325 close (evpipe [0]);
471 siginit (); 1326 close (evpipe [1]);
1327 }
1328 }
472 1329
1330#if EV_USE_INOTIFY
1331 if (fs_fd >= 0)
1332 close (fs_fd);
1333#endif
1334
1335 if (backend_fd >= 0)
1336 close (backend_fd);
1337
1338#if EV_USE_PORT
1339 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1340#endif
1341#if EV_USE_KQUEUE
1342 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1343#endif
1344#if EV_USE_EPOLL
1345 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1346#endif
1347#if EV_USE_POLL
1348 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1349#endif
1350#if EV_USE_SELECT
1351 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1352#endif
1353
1354 for (i = NUMPRI; i--; )
1355 {
1356 array_free (pending, [i]);
1357#if EV_IDLE_ENABLE
1358 array_free (idle, [i]);
1359#endif
1360 }
1361
1362 ev_free (anfds); anfdmax = 0;
1363
1364 /* have to use the microsoft-never-gets-it-right macro */
1365 array_free (fdchange, EMPTY);
1366 array_free (timer, EMPTY);
1367#if EV_PERIODIC_ENABLE
1368 array_free (periodic, EMPTY);
1369#endif
1370#if EV_FORK_ENABLE
1371 array_free (fork, EMPTY);
1372#endif
1373 array_free (prepare, EMPTY);
1374 array_free (check, EMPTY);
1375#if EV_ASYNC_ENABLE
1376 array_free (async, EMPTY);
1377#endif
1378
1379 backend = 0;
1380}
1381
1382#if EV_USE_INOTIFY
1383void inline_size infy_fork (EV_P);
1384#endif
1385
1386void inline_size
1387loop_fork (EV_P)
1388{
1389#if EV_USE_PORT
1390 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1391#endif
1392#if EV_USE_KQUEUE
1393 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1394#endif
1395#if EV_USE_EPOLL
1396 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1397#endif
1398#if EV_USE_INOTIFY
1399 infy_fork (EV_A);
1400#endif
1401
1402 if (ev_is_active (&pipeev))
1403 {
1404 /* this "locks" the handlers against writing to the pipe */
1405 /* while we modify the fd vars */
1406 gotsig = 1;
1407#if EV_ASYNC_ENABLE
1408 gotasync = 1;
1409#endif
1410
1411 ev_ref (EV_A);
1412 ev_io_stop (EV_A_ &pipeev);
1413
1414#if EV_USE_EVENTFD
1415 if (evfd >= 0)
1416 close (evfd);
1417#endif
1418
1419 if (evpipe [0] >= 0)
1420 {
1421 close (evpipe [0]);
1422 close (evpipe [1]);
1423 }
1424
1425 evpipe_init (EV_A);
1426 /* now iterate over everything, in case we missed something */
1427 pipecb (EV_A_ &pipeev, EV_READ);
1428 }
1429
1430 postfork = 0;
1431}
1432
1433#if EV_MULTIPLICITY
1434struct ev_loop *
1435ev_loop_new (unsigned int flags)
1436{
1437 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1438
1439 memset (loop, 0, sizeof (struct ev_loop));
1440
1441 loop_init (EV_A_ flags);
1442
1443 if (ev_backend (EV_A))
1444 return loop;
1445
1446 return 0;
1447}
1448
1449void
1450ev_loop_destroy (EV_P)
1451{
1452 loop_destroy (EV_A);
1453 ev_free (loop);
1454}
1455
1456void
1457ev_loop_fork (EV_P)
1458{
1459 postfork = 1; /* must be in line with ev_default_fork */
1460}
1461#endif
1462
1463#if EV_MULTIPLICITY
1464struct ev_loop *
1465ev_default_loop_init (unsigned int flags)
1466#else
1467int
1468ev_default_loop (unsigned int flags)
1469#endif
1470{
1471 if (!ev_default_loop_ptr)
1472 {
1473#if EV_MULTIPLICITY
1474 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1475#else
1476 ev_default_loop_ptr = 1;
1477#endif
1478
1479 loop_init (EV_A_ flags);
1480
1481 if (ev_backend (EV_A))
1482 {
1483#ifndef _WIN32
473 ev_signal_init (&childev, childcb, SIGCHLD); 1484 ev_signal_init (&childev, childcb, SIGCHLD);
1485 ev_set_priority (&childev, EV_MAXPRI);
474 ev_signal_start (&childev); 1486 ev_signal_start (EV_A_ &childev);
1487 ev_unref (EV_A); /* child watcher should not keep loop alive */
1488#endif
475 } 1489 }
1490 else
1491 ev_default_loop_ptr = 0;
476 } 1492 }
477 1493
478 return ev_method; 1494 return ev_default_loop_ptr;
1495}
1496
1497void
1498ev_default_destroy (void)
1499{
1500#if EV_MULTIPLICITY
1501 struct ev_loop *loop = ev_default_loop_ptr;
1502#endif
1503
1504#ifndef _WIN32
1505 ev_ref (EV_A); /* child watcher */
1506 ev_signal_stop (EV_A_ &childev);
1507#endif
1508
1509 loop_destroy (EV_A);
1510}
1511
1512void
1513ev_default_fork (void)
1514{
1515#if EV_MULTIPLICITY
1516 struct ev_loop *loop = ev_default_loop_ptr;
1517#endif
1518
1519 if (backend)
1520 postfork = 1; /* must be in line with ev_loop_fork */
479} 1521}
480 1522
481/*****************************************************************************/ 1523/*****************************************************************************/
482 1524
483void 1525void
484ev_prefork (void) 1526ev_invoke (EV_P_ void *w, int revents)
485{ 1527{
486 /* nop */ 1528 EV_CB_INVOKE ((W)w, revents);
487} 1529}
488 1530
489void 1531void 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) 1532call_pending (EV_P)
514{ 1533{
1534 int pri;
1535
1536 for (pri = NUMPRI; pri--; )
515 while (pendingcnt) 1537 while (pendingcnt [pri])
516 { 1538 {
517 ANPENDING *p = pendings + --pendingcnt; 1539 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
518 1540
519 if (p->w) 1541 if (expect_true (p->w))
1542 {
1543 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1544
1545 p->w->pending = 0;
1546 EV_CB_INVOKE (p->w, p->events);
1547 }
1548 }
1549}
1550
1551#if EV_IDLE_ENABLE
1552void inline_size
1553idle_reify (EV_P)
1554{
1555 if (expect_false (idleall))
1556 {
1557 int pri;
1558
1559 for (pri = NUMPRI; pri--; )
520 { 1560 {
521 p->w->pending = 0; 1561 if (pendingcnt [pri])
522 p->w->cb (p->w, p->events); 1562 break;
1563
1564 if (idlecnt [pri])
1565 {
1566 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1567 break;
1568 }
523 } 1569 }
524 } 1570 }
525} 1571}
1572#endif
526 1573
527static void 1574void inline_size
528timers_reify (void) 1575timers_reify (EV_P)
529{ 1576{
530 while (timercnt && timers [0]->at <= now) 1577 while (timercnt && ev_at (timers [HEAP0]) <= mn_now)
531 { 1578 {
532 struct ev_timer *w = timers [0]; 1579 ev_timer *w = (ev_timer *)timers [HEAP0];
1580
1581 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
533 1582
534 /* first reschedule or stop timer */ 1583 /* first reschedule or stop timer */
535 if (w->repeat) 1584 if (w->repeat)
536 { 1585 {
537 w->at = now + w->repeat; 1586 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
538 assert (("timer timeout in the past, negative repeat?", w->at > now)); 1587
1588 ev_at (w) += w->repeat;
1589 if (ev_at (w) < mn_now)
1590 ev_at (w) = mn_now;
1591
539 downheap ((WT *)timers, timercnt, 0); 1592 downheap (timers, timercnt, HEAP0);
540 } 1593 }
541 else 1594 else
542 ev_timer_stop (w); /* nonrepeating: stop timer */ 1595 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
543 1596
544 event ((W)w, EV_TIMEOUT); 1597 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
545 } 1598 }
546} 1599}
547 1600
548static void 1601#if EV_PERIODIC_ENABLE
1602void inline_size
549periodics_reify (void) 1603periodics_reify (EV_P)
550{ 1604{
551 while (periodiccnt && periodics [0]->at <= ev_now) 1605 while (periodiccnt && ev_at (periodics [HEAP0]) <= ev_rt_now)
552 { 1606 {
553 struct ev_periodic *w = periodics [0]; 1607 ev_periodic *w = (ev_periodic *)periodics [HEAP0];
1608
1609 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
554 1610
555 /* first reschedule or stop timer */ 1611 /* first reschedule or stop timer */
556 if (w->interval) 1612 if (w->reschedule_cb)
557 { 1613 {
558 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 1614 ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
559 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 1615 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
560 downheap ((WT *)periodics, periodiccnt, 0); 1616 downheap (periodics, periodiccnt, 1);
1617 }
1618 else if (w->interval)
1619 {
1620 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1621 if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
1622 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
1623 downheap (periodics, periodiccnt, HEAP0);
561 } 1624 }
562 else 1625 else
563 ev_periodic_stop (w); /* nonrepeating: stop timer */ 1626 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
564 1627
565 event ((W)w, EV_TIMEOUT); 1628 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
566 } 1629 }
567} 1630}
568 1631
569static void 1632static void noinline
570periodics_reschedule (ev_tstamp diff) 1633periodics_reschedule (EV_P)
571{ 1634{
572 int i; 1635 int i;
573 1636
574 /* adjust periodics after time jump */ 1637 /* adjust periodics after time jump */
575 for (i = 0; i < periodiccnt; ++i) 1638 for (i = 1; i <= periodiccnt; ++i)
576 { 1639 {
577 struct ev_periodic *w = periodics [i]; 1640 ev_periodic *w = (ev_periodic *)periodics [i];
578 1641
1642 if (w->reschedule_cb)
1643 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
579 if (w->interval) 1644 else if (w->interval)
1645 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1646 }
1647
1648 /* now rebuild the heap */
1649 for (i = periodiccnt >> 1; --i; )
1650 downheap (periodics, periodiccnt, i + HEAP0);
1651}
1652#endif
1653
1654void inline_speed
1655time_update (EV_P_ ev_tstamp max_block)
1656{
1657 int i;
1658
1659#if EV_USE_MONOTONIC
1660 if (expect_true (have_monotonic))
1661 {
1662 ev_tstamp odiff = rtmn_diff;
1663
1664 mn_now = get_clock ();
1665
1666 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1667 /* interpolate in the meantime */
1668 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
580 { 1669 {
581 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 1670 ev_rt_now = rtmn_diff + mn_now;
582 1671 return;
583 if (fabs (diff) >= 1e-4)
584 {
585 ev_periodic_stop (w);
586 ev_periodic_start (w);
587
588 i = 0; /* restart loop, inefficient, but time jumps should be rare */
589 }
590 } 1672 }
591 }
592}
593 1673
594static void 1674 now_floor = mn_now;
595time_update (void)
596{
597 int i;
598
599 ev_now = ev_time (); 1675 ev_rt_now = ev_time ();
600 1676
601 if (have_monotonic)
602 {
603 ev_tstamp odiff = diff;
604
605 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1677 /* loop a few times, before making important decisions.
1678 * on the choice of "4": one iteration isn't enough,
1679 * in case we get preempted during the calls to
1680 * ev_time and get_clock. a second call is almost guaranteed
1681 * to succeed in that case, though. and looping a few more times
1682 * doesn't hurt either as we only do this on time-jumps or
1683 * in the unlikely event of having been preempted here.
1684 */
1685 for (i = 4; --i; )
606 { 1686 {
607 now = get_clock ();
608 diff = ev_now - now; 1687 rtmn_diff = ev_rt_now - mn_now;
609 1688
610 if (fabs (odiff - diff) < MIN_TIMEJUMP) 1689 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
611 return; /* all is well */ 1690 return; /* all is well */
612 1691
613 ev_now = ev_time (); 1692 ev_rt_now = ev_time ();
1693 mn_now = get_clock ();
1694 now_floor = mn_now;
614 } 1695 }
615 1696
1697# if EV_PERIODIC_ENABLE
616 periodics_reschedule (diff - odiff); 1698 periodics_reschedule (EV_A);
1699# endif
617 /* no timer adjustment, as the monotonic clock doesn't jump */ 1700 /* no timer adjustment, as the monotonic clock doesn't jump */
1701 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
618 } 1702 }
619 else 1703 else
1704#endif
620 { 1705 {
621 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 1706 ev_rt_now = ev_time ();
1707
1708 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
622 { 1709 {
1710#if EV_PERIODIC_ENABLE
623 periodics_reschedule (ev_now - now); 1711 periodics_reschedule (EV_A);
624 1712#endif
625 /* adjust timers. this is easy, as the offset is the same for all */ 1713 /* adjust timers. this is easy, as the offset is the same for all of them */
626 for (i = 0; i < timercnt; ++i) 1714 for (i = 1; i <= timercnt; ++i)
627 timers [i]->at += diff; 1715 ev_at (timers [i]) += ev_rt_now - mn_now;
628 } 1716 }
629 1717
630 now = ev_now; 1718 mn_now = ev_rt_now;
631 } 1719 }
632} 1720}
633 1721
634int ev_loop_done; 1722void
1723ev_ref (EV_P)
1724{
1725 ++activecnt;
1726}
635 1727
1728void
1729ev_unref (EV_P)
1730{
1731 --activecnt;
1732}
1733
1734static int loop_done;
1735
1736void
636void ev_loop (int flags) 1737ev_loop (EV_P_ int flags)
637{ 1738{
638 double block; 1739 loop_done = EVUNLOOP_CANCEL;
639 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1740
1741 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
640 1742
641 do 1743 do
642 { 1744 {
1745#ifndef _WIN32
1746 if (expect_false (curpid)) /* penalise the forking check even more */
1747 if (expect_false (getpid () != curpid))
1748 {
1749 curpid = getpid ();
1750 postfork = 1;
1751 }
1752#endif
1753
1754#if EV_FORK_ENABLE
1755 /* we might have forked, so queue fork handlers */
1756 if (expect_false (postfork))
1757 if (forkcnt)
1758 {
1759 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1760 call_pending (EV_A);
1761 }
1762#endif
1763
643 /* queue check watchers (and execute them) */ 1764 /* queue prepare watchers (and execute them) */
644 if (preparecnt) 1765 if (expect_false (preparecnt))
645 { 1766 {
646 queue_events ((W *)prepares, preparecnt, EV_PREPARE); 1767 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
647 call_pending (); 1768 call_pending (EV_A);
648 } 1769 }
649 1770
1771 if (expect_false (!activecnt))
1772 break;
1773
1774 /* we might have forked, so reify kernel state if necessary */
1775 if (expect_false (postfork))
1776 loop_fork (EV_A);
1777
650 /* update fd-related kernel structures */ 1778 /* update fd-related kernel structures */
651 fd_reify (); 1779 fd_reify (EV_A);
652 1780
653 /* calculate blocking time */ 1781 /* calculate blocking time */
1782 {
1783 ev_tstamp waittime = 0.;
1784 ev_tstamp sleeptime = 0.;
654 1785
655 /* we only need this for !monotonic clockor timers, but as we basically 1786 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 { 1787 {
1788 /* update time to cancel out callback processing overhead */
1789 time_update (EV_A_ 1e100);
1790
663 block = MAX_BLOCKTIME; 1791 waittime = MAX_BLOCKTIME;
664 1792
665 if (timercnt) 1793 if (timercnt)
666 { 1794 {
667 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge; 1795 ev_tstamp to = ev_at (timers [HEAP0]) - mn_now + backend_fudge;
668 if (block > to) block = to; 1796 if (waittime > to) waittime = to;
669 } 1797 }
670 1798
1799#if EV_PERIODIC_ENABLE
671 if (periodiccnt) 1800 if (periodiccnt)
672 { 1801 {
673 ev_tstamp to = periodics [0]->at - ev_now + method_fudge; 1802 ev_tstamp to = ev_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
674 if (block > to) block = to; 1803 if (waittime > to) waittime = to;
675 } 1804 }
1805#endif
676 1806
677 if (block < 0.) block = 0.; 1807 if (expect_false (waittime < timeout_blocktime))
1808 waittime = timeout_blocktime;
1809
1810 sleeptime = waittime - backend_fudge;
1811
1812 if (expect_true (sleeptime > io_blocktime))
1813 sleeptime = io_blocktime;
1814
1815 if (sleeptime)
1816 {
1817 ev_sleep (sleeptime);
1818 waittime -= sleeptime;
1819 }
678 } 1820 }
679 1821
680 method_poll (block); 1822 ++loop_count;
1823 backend_poll (EV_A_ waittime);
681 1824
682 /* update ev_now, do magic */ 1825 /* update ev_rt_now, do magic */
683 time_update (); 1826 time_update (EV_A_ waittime + sleeptime);
1827 }
684 1828
685 /* queue pending timers and reschedule them */ 1829 /* queue pending timers and reschedule them */
686 timers_reify (); /* relative timers called last */ 1830 timers_reify (EV_A); /* relative timers called last */
1831#if EV_PERIODIC_ENABLE
687 periodics_reify (); /* absolute timers called first */ 1832 periodics_reify (EV_A); /* absolute timers called first */
1833#endif
688 1834
1835#if EV_IDLE_ENABLE
689 /* queue idle watchers unless io or timers are pending */ 1836 /* queue idle watchers unless other events are pending */
690 if (!pendingcnt) 1837 idle_reify (EV_A);
691 queue_events ((W *)idles, idlecnt, EV_IDLE); 1838#endif
692 1839
693 /* queue check watchers, to be executed first */ 1840 /* queue check watchers, to be executed first */
694 if (checkcnt) 1841 if (expect_false (checkcnt))
695 queue_events ((W *)checks, checkcnt, EV_CHECK); 1842 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
696 1843
697 call_pending (); 1844 call_pending (EV_A);
698 } 1845 }
699 while (!ev_loop_done); 1846 while (expect_true (
1847 activecnt
1848 && !loop_done
1849 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1850 ));
700 1851
701 if (ev_loop_done != 2) 1852 if (loop_done == EVUNLOOP_ONE)
1853 loop_done = EVUNLOOP_CANCEL;
1854}
1855
1856void
1857ev_unloop (EV_P_ int how)
1858{
702 ev_loop_done = 0; 1859 loop_done = how;
703} 1860}
704 1861
705/*****************************************************************************/ 1862/*****************************************************************************/
706 1863
707static void 1864void inline_size
708wlist_add (WL *head, WL elem) 1865wlist_add (WL *head, WL elem)
709{ 1866{
710 elem->next = *head; 1867 elem->next = *head;
711 *head = elem; 1868 *head = elem;
712} 1869}
713 1870
714static void 1871void inline_size
715wlist_del (WL *head, WL elem) 1872wlist_del (WL *head, WL elem)
716{ 1873{
717 while (*head) 1874 while (*head)
718 { 1875 {
719 if (*head == elem) 1876 if (*head == elem)
… …
724 1881
725 head = &(*head)->next; 1882 head = &(*head)->next;
726 } 1883 }
727} 1884}
728 1885
729static void 1886void inline_speed
730ev_clear (W w) 1887clear_pending (EV_P_ W w)
731{ 1888{
732 if (w->pending) 1889 if (w->pending)
733 { 1890 {
734 pendings [w->pending - 1].w = 0; 1891 pendings [ABSPRI (w)][w->pending - 1].w = 0;
735 w->pending = 0; 1892 w->pending = 0;
736 } 1893 }
737} 1894}
738 1895
739static void 1896int
1897ev_clear_pending (EV_P_ void *w)
1898{
1899 W w_ = (W)w;
1900 int pending = w_->pending;
1901
1902 if (expect_true (pending))
1903 {
1904 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1905 w_->pending = 0;
1906 p->w = 0;
1907 return p->events;
1908 }
1909 else
1910 return 0;
1911}
1912
1913void inline_size
1914pri_adjust (EV_P_ W w)
1915{
1916 int pri = w->priority;
1917 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1918 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1919 w->priority = pri;
1920}
1921
1922void inline_speed
740ev_start (W w, int active) 1923ev_start (EV_P_ W w, int active)
741{ 1924{
1925 pri_adjust (EV_A_ w);
742 w->active = active; 1926 w->active = active;
1927 ev_ref (EV_A);
743} 1928}
744 1929
745static void 1930void inline_size
746ev_stop (W w) 1931ev_stop (EV_P_ W w)
747{ 1932{
1933 ev_unref (EV_A);
748 w->active = 0; 1934 w->active = 0;
749} 1935}
750 1936
751/*****************************************************************************/ 1937/*****************************************************************************/
752 1938
753void 1939void noinline
754ev_io_start (struct ev_io *w) 1940ev_io_start (EV_P_ ev_io *w)
755{ 1941{
1942 int fd = w->fd;
1943
756 if (ev_is_active (w)) 1944 if (expect_false (ev_is_active (w)))
757 return; 1945 return;
758 1946
759 int fd = w->fd; 1947 assert (("ev_io_start called with negative fd", fd >= 0));
760 1948
761 ev_start ((W)w, 1); 1949 ev_start (EV_A_ (W)w, 1);
762 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1950 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
763 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1951 wlist_add (&anfds[fd].head, (WL)w);
764 1952
765 fd_change (fd); 1953 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1954 w->events &= ~EV_IOFDSET;
766} 1955}
767 1956
768void 1957void noinline
769ev_io_stop (struct ev_io *w) 1958ev_io_stop (EV_P_ ev_io *w)
770{ 1959{
771 ev_clear ((W)w); 1960 clear_pending (EV_A_ (W)w);
772 if (!ev_is_active (w)) 1961 if (expect_false (!ev_is_active (w)))
773 return; 1962 return;
774 1963
1964 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1965
775 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1966 wlist_del (&anfds[w->fd].head, (WL)w);
776 ev_stop ((W)w); 1967 ev_stop (EV_A_ (W)w);
777 1968
778 fd_change (w->fd); 1969 fd_change (EV_A_ w->fd, 1);
779} 1970}
780 1971
781void 1972void noinline
782ev_timer_start (struct ev_timer *w) 1973ev_timer_start (EV_P_ ev_timer *w)
783{ 1974{
784 if (ev_is_active (w)) 1975 if (expect_false (ev_is_active (w)))
785 return; 1976 return;
786 1977
787 w->at += now; 1978 ev_at (w) += mn_now;
788 1979
789 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.)); 1980 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
790 1981
791 ev_start ((W)w, ++timercnt); 1982 ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
792 array_needsize (timers, timermax, timercnt, ); 1983 array_needsize (WT, timers, timermax, timercnt + HEAP0, EMPTY2);
793 timers [timercnt - 1] = w; 1984 timers [ev_active (w)] = (WT)w;
794 upheap ((WT *)timers, timercnt - 1); 1985 upheap (timers, ev_active (w));
795}
796 1986
797void 1987 /*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
1988}
1989
1990void noinline
798ev_timer_stop (struct ev_timer *w) 1991ev_timer_stop (EV_P_ ev_timer *w)
799{ 1992{
800 ev_clear ((W)w); 1993 clear_pending (EV_A_ (W)w);
801 if (!ev_is_active (w)) 1994 if (expect_false (!ev_is_active (w)))
802 return; 1995 return;
803 1996
804 if (w->active < timercnt--) 1997 {
1998 int active = ev_active (w);
1999
2000 assert (("internal timer heap corruption", timers [active] == (WT)w));
2001
2002 if (expect_true (active < timercnt + HEAP0 - 1))
805 { 2003 {
806 timers [w->active - 1] = timers [timercnt]; 2004 timers [active] = timers [timercnt + HEAP0 - 1];
807 downheap ((WT *)timers, timercnt, w->active - 1); 2005 adjustheap (timers, timercnt, active);
808 } 2006 }
809 2007
810 w->at = w->repeat; 2008 --timercnt;
2009 }
811 2010
2011 ev_at (w) -= mn_now;
2012
812 ev_stop ((W)w); 2013 ev_stop (EV_A_ (W)w);
813} 2014}
814 2015
815void 2016void noinline
816ev_timer_again (struct ev_timer *w) 2017ev_timer_again (EV_P_ ev_timer *w)
817{ 2018{
818 if (ev_is_active (w)) 2019 if (ev_is_active (w))
819 { 2020 {
820 if (w->repeat) 2021 if (w->repeat)
821 { 2022 {
822 w->at = now + w->repeat; 2023 ev_at (w) = mn_now + w->repeat;
823 downheap ((WT *)timers, timercnt, w->active - 1); 2024 adjustheap (timers, timercnt, ev_active (w));
824 } 2025 }
825 else 2026 else
826 ev_timer_stop (w); 2027 ev_timer_stop (EV_A_ w);
827 } 2028 }
828 else if (w->repeat) 2029 else if (w->repeat)
2030 {
2031 ev_at (w) = w->repeat;
829 ev_timer_start (w); 2032 ev_timer_start (EV_A_ w);
2033 }
830} 2034}
831 2035
832void 2036#if EV_PERIODIC_ENABLE
2037void noinline
833ev_periodic_start (struct ev_periodic *w) 2038ev_periodic_start (EV_P_ ev_periodic *w)
834{ 2039{
835 if (ev_is_active (w)) 2040 if (expect_false (ev_is_active (w)))
836 return; 2041 return;
837 2042
838 assert (("periodic interval value less than zero not allowed", w->interval >= 0.)); 2043 if (w->reschedule_cb)
839 2044 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2045 else if (w->interval)
2046 {
2047 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 */ 2048 /* 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; 2049 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2050 }
2051 else
2052 ev_at (w) = w->offset;
843 2053
844 ev_start ((W)w, ++periodiccnt); 2054 ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
845 array_needsize (periodics, periodicmax, periodiccnt, ); 2055 array_needsize (WT, periodics, periodicmax, periodiccnt + HEAP0, EMPTY2);
846 periodics [periodiccnt - 1] = w; 2056 periodics [ev_active (w)] = (WT)w;
847 upheap ((WT *)periodics, periodiccnt - 1); 2057 upheap (periodics, ev_active (w));
848}
849 2058
850void 2059 /*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
2060}
2061
2062void noinline
851ev_periodic_stop (struct ev_periodic *w) 2063ev_periodic_stop (EV_P_ ev_periodic *w)
852{ 2064{
853 ev_clear ((W)w); 2065 clear_pending (EV_A_ (W)w);
854 if (!ev_is_active (w)) 2066 if (expect_false (!ev_is_active (w)))
855 return; 2067 return;
856 2068
857 if (w->active < periodiccnt--) 2069 {
2070 int active = ev_active (w);
2071
2072 assert (("internal periodic heap corruption", periodics [active] == (WT)w));
2073
2074 if (expect_true (active < periodiccnt + HEAP0 - 1))
858 { 2075 {
859 periodics [w->active - 1] = periodics [periodiccnt]; 2076 periodics [active] = periodics [periodiccnt + HEAP0 - 1];
860 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2077 adjustheap (periodics, periodiccnt, active);
861 } 2078 }
862 2079
2080 --periodiccnt;
2081 }
2082
863 ev_stop ((W)w); 2083 ev_stop (EV_A_ (W)w);
864} 2084}
865 2085
866void 2086void noinline
2087ev_periodic_again (EV_P_ ev_periodic *w)
2088{
2089 /* TODO: use adjustheap and recalculation */
2090 ev_periodic_stop (EV_A_ w);
2091 ev_periodic_start (EV_A_ w);
2092}
2093#endif
2094
2095#ifndef SA_RESTART
2096# define SA_RESTART 0
2097#endif
2098
2099void noinline
867ev_signal_start (struct ev_signal *w) 2100ev_signal_start (EV_P_ ev_signal *w)
868{ 2101{
2102#if EV_MULTIPLICITY
2103 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2104#endif
869 if (ev_is_active (w)) 2105 if (expect_false (ev_is_active (w)))
870 return; 2106 return;
871 2107
872 ev_start ((W)w, 1); 2108 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2109
2110 evpipe_init (EV_A);
2111
2112 {
2113#ifndef _WIN32
2114 sigset_t full, prev;
2115 sigfillset (&full);
2116 sigprocmask (SIG_SETMASK, &full, &prev);
2117#endif
2118
873 array_needsize (signals, signalmax, w->signum, signals_init); 2119 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2120
2121#ifndef _WIN32
2122 sigprocmask (SIG_SETMASK, &prev, 0);
2123#endif
2124 }
2125
2126 ev_start (EV_A_ (W)w, 1);
874 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2127 wlist_add (&signals [w->signum - 1].head, (WL)w);
875 2128
876 if (!w->next) 2129 if (!((WL)w)->next)
877 { 2130 {
2131#if _WIN32
2132 signal (w->signum, ev_sighandler);
2133#else
878 struct sigaction sa; 2134 struct sigaction sa;
879 sa.sa_handler = sighandler; 2135 sa.sa_handler = ev_sighandler;
880 sigfillset (&sa.sa_mask); 2136 sigfillset (&sa.sa_mask);
881 sa.sa_flags = 0; 2137 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
882 sigaction (w->signum, &sa, 0); 2138 sigaction (w->signum, &sa, 0);
2139#endif
883 } 2140 }
884} 2141}
885 2142
886void 2143void noinline
887ev_signal_stop (struct ev_signal *w) 2144ev_signal_stop (EV_P_ ev_signal *w)
888{ 2145{
889 ev_clear ((W)w); 2146 clear_pending (EV_A_ (W)w);
890 if (!ev_is_active (w)) 2147 if (expect_false (!ev_is_active (w)))
891 return; 2148 return;
892 2149
893 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2150 wlist_del (&signals [w->signum - 1].head, (WL)w);
894 ev_stop ((W)w); 2151 ev_stop (EV_A_ (W)w);
895 2152
896 if (!signals [w->signum - 1].head) 2153 if (!signals [w->signum - 1].head)
897 signal (w->signum, SIG_DFL); 2154 signal (w->signum, SIG_DFL);
898} 2155}
899 2156
900void 2157void
901ev_idle_start (struct ev_idle *w) 2158ev_child_start (EV_P_ ev_child *w)
902{ 2159{
2160#if EV_MULTIPLICITY
2161 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2162#endif
903 if (ev_is_active (w)) 2163 if (expect_false (ev_is_active (w)))
904 return; 2164 return;
905 2165
906 ev_start ((W)w, ++idlecnt); 2166 ev_start (EV_A_ (W)w, 1);
907 array_needsize (idles, idlemax, idlecnt, ); 2167 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
908 idles [idlecnt - 1] = w;
909} 2168}
910 2169
911void 2170void
912ev_idle_stop (struct ev_idle *w) 2171ev_child_stop (EV_P_ ev_child *w)
913{ 2172{
914 ev_clear ((W)w); 2173 clear_pending (EV_A_ (W)w);
915 if (ev_is_active (w)) 2174 if (expect_false (!ev_is_active (w)))
916 return; 2175 return;
917 2176
918 idles [w->active - 1] = idles [--idlecnt]; 2177 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
919 ev_stop ((W)w); 2178 ev_stop (EV_A_ (W)w);
920} 2179}
921 2180
922void 2181#if EV_STAT_ENABLE
923ev_prepare_start (struct ev_prepare *w) 2182
2183# ifdef _WIN32
2184# undef lstat
2185# define lstat(a,b) _stati64 (a,b)
2186# endif
2187
2188#define DEF_STAT_INTERVAL 5.0074891
2189#define MIN_STAT_INTERVAL 0.1074891
2190
2191static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2192
2193#if EV_USE_INOTIFY
2194# define EV_INOTIFY_BUFSIZE 8192
2195
2196static void noinline
2197infy_add (EV_P_ ev_stat *w)
924{ 2198{
925 if (ev_is_active (w)) 2199 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);
2200
2201 if (w->wd < 0)
2202 {
2203 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2204
2205 /* monitor some parent directory for speedup hints */
2206 /* note that exceeding the hardcoded limit is not a correctness issue, */
2207 /* but an efficiency issue only */
2208 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2209 {
2210 char path [4096];
2211 strcpy (path, w->path);
2212
2213 do
2214 {
2215 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2216 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2217
2218 char *pend = strrchr (path, '/');
2219
2220 if (!pend)
2221 break; /* whoops, no '/', complain to your admin */
2222
2223 *pend = 0;
2224 w->wd = inotify_add_watch (fs_fd, path, mask);
2225 }
2226 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2227 }
2228 }
2229 else
2230 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2231
2232 if (w->wd >= 0)
2233 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2234}
2235
2236static void noinline
2237infy_del (EV_P_ ev_stat *w)
2238{
2239 int slot;
2240 int wd = w->wd;
2241
2242 if (wd < 0)
926 return; 2243 return;
927 2244
2245 w->wd = -2;
2246 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2247 wlist_del (&fs_hash [slot].head, (WL)w);
2248
2249 /* remove this watcher, if others are watching it, they will rearm */
2250 inotify_rm_watch (fs_fd, wd);
2251}
2252
2253static void noinline
2254infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2255{
2256 if (slot < 0)
2257 /* overflow, need to check for all hahs slots */
2258 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2259 infy_wd (EV_A_ slot, wd, ev);
2260 else
2261 {
2262 WL w_;
2263
2264 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2265 {
2266 ev_stat *w = (ev_stat *)w_;
2267 w_ = w_->next; /* lets us remove this watcher and all before it */
2268
2269 if (w->wd == wd || wd == -1)
2270 {
2271 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2272 {
2273 w->wd = -1;
2274 infy_add (EV_A_ w); /* re-add, no matter what */
2275 }
2276
2277 stat_timer_cb (EV_A_ &w->timer, 0);
2278 }
2279 }
2280 }
2281}
2282
2283static void
2284infy_cb (EV_P_ ev_io *w, int revents)
2285{
2286 char buf [EV_INOTIFY_BUFSIZE];
2287 struct inotify_event *ev = (struct inotify_event *)buf;
2288 int ofs;
2289 int len = read (fs_fd, buf, sizeof (buf));
2290
2291 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2292 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2293}
2294
2295void inline_size
2296infy_init (EV_P)
2297{
2298 if (fs_fd != -2)
2299 return;
2300
2301 fs_fd = inotify_init ();
2302
2303 if (fs_fd >= 0)
2304 {
2305 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2306 ev_set_priority (&fs_w, EV_MAXPRI);
2307 ev_io_start (EV_A_ &fs_w);
2308 }
2309}
2310
2311void inline_size
2312infy_fork (EV_P)
2313{
2314 int slot;
2315
2316 if (fs_fd < 0)
2317 return;
2318
2319 close (fs_fd);
2320 fs_fd = inotify_init ();
2321
2322 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2323 {
2324 WL w_ = fs_hash [slot].head;
2325 fs_hash [slot].head = 0;
2326
2327 while (w_)
2328 {
2329 ev_stat *w = (ev_stat *)w_;
2330 w_ = w_->next; /* lets us add this watcher */
2331
2332 w->wd = -1;
2333
2334 if (fs_fd >= 0)
2335 infy_add (EV_A_ w); /* re-add, no matter what */
2336 else
2337 ev_timer_start (EV_A_ &w->timer);
2338 }
2339
2340 }
2341}
2342
2343#endif
2344
2345void
2346ev_stat_stat (EV_P_ ev_stat *w)
2347{
2348 if (lstat (w->path, &w->attr) < 0)
2349 w->attr.st_nlink = 0;
2350 else if (!w->attr.st_nlink)
2351 w->attr.st_nlink = 1;
2352}
2353
2354static void noinline
2355stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2356{
2357 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2358
2359 /* we copy this here each the time so that */
2360 /* prev has the old value when the callback gets invoked */
2361 w->prev = w->attr;
2362 ev_stat_stat (EV_A_ w);
2363
2364 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2365 if (
2366 w->prev.st_dev != w->attr.st_dev
2367 || w->prev.st_ino != w->attr.st_ino
2368 || w->prev.st_mode != w->attr.st_mode
2369 || w->prev.st_nlink != w->attr.st_nlink
2370 || w->prev.st_uid != w->attr.st_uid
2371 || w->prev.st_gid != w->attr.st_gid
2372 || w->prev.st_rdev != w->attr.st_rdev
2373 || w->prev.st_size != w->attr.st_size
2374 || w->prev.st_atime != w->attr.st_atime
2375 || w->prev.st_mtime != w->attr.st_mtime
2376 || w->prev.st_ctime != w->attr.st_ctime
2377 ) {
2378 #if EV_USE_INOTIFY
2379 infy_del (EV_A_ w);
2380 infy_add (EV_A_ w);
2381 ev_stat_stat (EV_A_ w); /* avoid race... */
2382 #endif
2383
2384 ev_feed_event (EV_A_ w, EV_STAT);
2385 }
2386}
2387
2388void
2389ev_stat_start (EV_P_ ev_stat *w)
2390{
2391 if (expect_false (ev_is_active (w)))
2392 return;
2393
2394 /* since we use memcmp, we need to clear any padding data etc. */
2395 memset (&w->prev, 0, sizeof (ev_statdata));
2396 memset (&w->attr, 0, sizeof (ev_statdata));
2397
2398 ev_stat_stat (EV_A_ w);
2399
2400 if (w->interval < MIN_STAT_INTERVAL)
2401 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2402
2403 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2404 ev_set_priority (&w->timer, ev_priority (w));
2405
2406#if EV_USE_INOTIFY
2407 infy_init (EV_A);
2408
2409 if (fs_fd >= 0)
2410 infy_add (EV_A_ w);
2411 else
2412#endif
2413 ev_timer_start (EV_A_ &w->timer);
2414
2415 ev_start (EV_A_ (W)w, 1);
2416}
2417
2418void
2419ev_stat_stop (EV_P_ ev_stat *w)
2420{
2421 clear_pending (EV_A_ (W)w);
2422 if (expect_false (!ev_is_active (w)))
2423 return;
2424
2425#if EV_USE_INOTIFY
2426 infy_del (EV_A_ w);
2427#endif
2428 ev_timer_stop (EV_A_ &w->timer);
2429
2430 ev_stop (EV_A_ (W)w);
2431}
2432#endif
2433
2434#if EV_IDLE_ENABLE
2435void
2436ev_idle_start (EV_P_ ev_idle *w)
2437{
2438 if (expect_false (ev_is_active (w)))
2439 return;
2440
2441 pri_adjust (EV_A_ (W)w);
2442
2443 {
2444 int active = ++idlecnt [ABSPRI (w)];
2445
2446 ++idleall;
2447 ev_start (EV_A_ (W)w, active);
2448
2449 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2450 idles [ABSPRI (w)][active - 1] = w;
2451 }
2452}
2453
2454void
2455ev_idle_stop (EV_P_ ev_idle *w)
2456{
2457 clear_pending (EV_A_ (W)w);
2458 if (expect_false (!ev_is_active (w)))
2459 return;
2460
2461 {
2462 int active = ev_active (w);
2463
2464 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2465 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2466
2467 ev_stop (EV_A_ (W)w);
2468 --idleall;
2469 }
2470}
2471#endif
2472
2473void
2474ev_prepare_start (EV_P_ ev_prepare *w)
2475{
2476 if (expect_false (ev_is_active (w)))
2477 return;
2478
928 ev_start ((W)w, ++preparecnt); 2479 ev_start (EV_A_ (W)w, ++preparecnt);
929 array_needsize (prepares, preparemax, preparecnt, ); 2480 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
930 prepares [preparecnt - 1] = w; 2481 prepares [preparecnt - 1] = w;
931} 2482}
932 2483
933void 2484void
934ev_prepare_stop (struct ev_prepare *w) 2485ev_prepare_stop (EV_P_ ev_prepare *w)
935{ 2486{
936 ev_clear ((W)w); 2487 clear_pending (EV_A_ (W)w);
937 if (ev_is_active (w)) 2488 if (expect_false (!ev_is_active (w)))
938 return; 2489 return;
939 2490
2491 {
2492 int active = ev_active (w);
2493
940 prepares [w->active - 1] = prepares [--preparecnt]; 2494 prepares [active - 1] = prepares [--preparecnt];
2495 ev_active (prepares [active - 1]) = active;
2496 }
2497
941 ev_stop ((W)w); 2498 ev_stop (EV_A_ (W)w);
942} 2499}
943 2500
944void 2501void
945ev_check_start (struct ev_check *w) 2502ev_check_start (EV_P_ ev_check *w)
946{ 2503{
947 if (ev_is_active (w)) 2504 if (expect_false (ev_is_active (w)))
948 return; 2505 return;
949 2506
950 ev_start ((W)w, ++checkcnt); 2507 ev_start (EV_A_ (W)w, ++checkcnt);
951 array_needsize (checks, checkmax, checkcnt, ); 2508 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
952 checks [checkcnt - 1] = w; 2509 checks [checkcnt - 1] = w;
953} 2510}
954 2511
955void 2512void
956ev_check_stop (struct ev_check *w) 2513ev_check_stop (EV_P_ ev_check *w)
957{ 2514{
958 ev_clear ((W)w); 2515 clear_pending (EV_A_ (W)w);
959 if (ev_is_active (w)) 2516 if (expect_false (!ev_is_active (w)))
960 return; 2517 return;
961 2518
2519 {
2520 int active = ev_active (w);
2521
962 checks [w->active - 1] = checks [--checkcnt]; 2522 checks [active - 1] = checks [--checkcnt];
2523 ev_active (checks [active - 1]) = active;
2524 }
2525
963 ev_stop ((W)w); 2526 ev_stop (EV_A_ (W)w);
964} 2527}
965 2528
966void 2529#if EV_EMBED_ENABLE
967ev_child_start (struct ev_child *w) 2530void noinline
2531ev_embed_sweep (EV_P_ ev_embed *w)
968{ 2532{
2533 ev_loop (w->other, EVLOOP_NONBLOCK);
2534}
2535
2536static void
2537embed_io_cb (EV_P_ ev_io *io, int revents)
2538{
2539 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2540
969 if (ev_is_active (w)) 2541 if (ev_cb (w))
2542 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2543 else
2544 ev_loop (w->other, EVLOOP_NONBLOCK);
2545}
2546
2547static void
2548embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2549{
2550 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2551
2552 {
2553 struct ev_loop *loop = w->other;
2554
2555 while (fdchangecnt)
2556 {
2557 fd_reify (EV_A);
2558 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2559 }
2560 }
2561}
2562
2563#if 0
2564static void
2565embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2566{
2567 ev_idle_stop (EV_A_ idle);
2568}
2569#endif
2570
2571void
2572ev_embed_start (EV_P_ ev_embed *w)
2573{
2574 if (expect_false (ev_is_active (w)))
970 return; 2575 return;
971 2576
2577 {
2578 struct ev_loop *loop = w->other;
2579 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2580 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2581 }
2582
2583 ev_set_priority (&w->io, ev_priority (w));
2584 ev_io_start (EV_A_ &w->io);
2585
2586 ev_prepare_init (&w->prepare, embed_prepare_cb);
2587 ev_set_priority (&w->prepare, EV_MINPRI);
2588 ev_prepare_start (EV_A_ &w->prepare);
2589
2590 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2591
972 ev_start ((W)w, 1); 2592 ev_start (EV_A_ (W)w, 1);
973 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
974} 2593}
975 2594
976void 2595void
977ev_child_stop (struct ev_child *w) 2596ev_embed_stop (EV_P_ ev_embed *w)
978{ 2597{
979 ev_clear ((W)w); 2598 clear_pending (EV_A_ (W)w);
980 if (ev_is_active (w)) 2599 if (expect_false (!ev_is_active (w)))
981 return; 2600 return;
982 2601
983 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2602 ev_io_stop (EV_A_ &w->io);
2603 ev_prepare_stop (EV_A_ &w->prepare);
2604
984 ev_stop ((W)w); 2605 ev_stop (EV_A_ (W)w);
985} 2606}
2607#endif
2608
2609#if EV_FORK_ENABLE
2610void
2611ev_fork_start (EV_P_ ev_fork *w)
2612{
2613 if (expect_false (ev_is_active (w)))
2614 return;
2615
2616 ev_start (EV_A_ (W)w, ++forkcnt);
2617 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2618 forks [forkcnt - 1] = w;
2619}
2620
2621void
2622ev_fork_stop (EV_P_ ev_fork *w)
2623{
2624 clear_pending (EV_A_ (W)w);
2625 if (expect_false (!ev_is_active (w)))
2626 return;
2627
2628 {
2629 int active = ev_active (w);
2630
2631 forks [active - 1] = forks [--forkcnt];
2632 ev_active (forks [active - 1]) = active;
2633 }
2634
2635 ev_stop (EV_A_ (W)w);
2636}
2637#endif
2638
2639#if EV_ASYNC_ENABLE
2640void
2641ev_async_start (EV_P_ ev_async *w)
2642{
2643 if (expect_false (ev_is_active (w)))
2644 return;
2645
2646 evpipe_init (EV_A);
2647
2648 ev_start (EV_A_ (W)w, ++asynccnt);
2649 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2650 asyncs [asynccnt - 1] = w;
2651}
2652
2653void
2654ev_async_stop (EV_P_ ev_async *w)
2655{
2656 clear_pending (EV_A_ (W)w);
2657 if (expect_false (!ev_is_active (w)))
2658 return;
2659
2660 {
2661 int active = ev_active (w);
2662
2663 asyncs [active - 1] = asyncs [--asynccnt];
2664 ev_active (asyncs [active - 1]) = active;
2665 }
2666
2667 ev_stop (EV_A_ (W)w);
2668}
2669
2670void
2671ev_async_send (EV_P_ ev_async *w)
2672{
2673 w->sent = 1;
2674 evpipe_write (EV_A_ &gotasync);
2675}
2676#endif
986 2677
987/*****************************************************************************/ 2678/*****************************************************************************/
988 2679
989struct ev_once 2680struct ev_once
990{ 2681{
991 struct ev_io io; 2682 ev_io io;
992 struct ev_timer to; 2683 ev_timer to;
993 void (*cb)(int revents, void *arg); 2684 void (*cb)(int revents, void *arg);
994 void *arg; 2685 void *arg;
995}; 2686};
996 2687
997static void 2688static void
998once_cb (struct ev_once *once, int revents) 2689once_cb (EV_P_ struct ev_once *once, int revents)
999{ 2690{
1000 void (*cb)(int revents, void *arg) = once->cb; 2691 void (*cb)(int revents, void *arg) = once->cb;
1001 void *arg = once->arg; 2692 void *arg = once->arg;
1002 2693
1003 ev_io_stop (&once->io); 2694 ev_io_stop (EV_A_ &once->io);
1004 ev_timer_stop (&once->to); 2695 ev_timer_stop (EV_A_ &once->to);
1005 free (once); 2696 ev_free (once);
1006 2697
1007 cb (revents, arg); 2698 cb (revents, arg);
1008} 2699}
1009 2700
1010static void 2701static void
1011once_cb_io (struct ev_io *w, int revents) 2702once_cb_io (EV_P_ ev_io *w, int revents)
1012{ 2703{
1013 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2704 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1014} 2705}
1015 2706
1016static void 2707static void
1017once_cb_to (struct ev_timer *w, int revents) 2708once_cb_to (EV_P_ ev_timer *w, int revents)
1018{ 2709{
1019 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2710 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1020} 2711}
1021 2712
1022void 2713void
1023ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2714ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1024{ 2715{
1025 struct ev_once *once = malloc (sizeof (struct ev_once)); 2716 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1026 2717
1027 if (!once) 2718 if (expect_false (!once))
2719 {
1028 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 2720 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1029 else 2721 return;
1030 { 2722 }
2723
1031 once->cb = cb; 2724 once->cb = cb;
1032 once->arg = arg; 2725 once->arg = arg;
1033 2726
1034 ev_watcher_init (&once->io, once_cb_io); 2727 ev_init (&once->io, once_cb_io);
1035 if (fd >= 0) 2728 if (fd >= 0)
1036 { 2729 {
1037 ev_io_set (&once->io, fd, events); 2730 ev_io_set (&once->io, fd, events);
1038 ev_io_start (&once->io); 2731 ev_io_start (EV_A_ &once->io);
1039 } 2732 }
1040 2733
1041 ev_watcher_init (&once->to, once_cb_to); 2734 ev_init (&once->to, once_cb_to);
1042 if (timeout >= 0.) 2735 if (timeout >= 0.)
1043 { 2736 {
1044 ev_timer_set (&once->to, timeout, 0.); 2737 ev_timer_set (&once->to, timeout, 0.);
1045 ev_timer_start (&once->to); 2738 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 { 2739 }
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} 2740}
1127 2741
2742#if EV_MULTIPLICITY
2743 #include "ev_wrap.h"
1128#endif 2744#endif
1129 2745
2746#ifdef __cplusplus
2747}
2748#endif
1130 2749
1131
1132

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