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Comparing libev/ev.c (file contents):
Revision 1.56 by root, Sun Nov 4 15:58:49 2007 UTC vs.
Revision 1.235 by root, Wed May 7 14:45:17 2008 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
31#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
32# include "config.h" 49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC
54# define EV_USE_MONOTONIC 1
55# endif
56# ifndef EV_USE_REALTIME
57# define EV_USE_REALTIME 1
58# endif
59# else
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0
62# endif
63# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0
65# endif
66# endif
67
68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
73# endif
74# endif
75
76# ifndef EV_USE_SELECT
77# if HAVE_SELECT && HAVE_SYS_SELECT_H
78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif
82# endif
83
84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
86# define EV_USE_POLL 1
87# else
88# define EV_USE_POLL 0
89# endif
90# endif
91
92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94# define EV_USE_EPOLL 1
95# else
96# define EV_USE_EPOLL 0
97# endif
98# endif
99
100# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif
106# endif
107
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1
111# else
112# define EV_USE_PORT 0
113# endif
114# endif
115
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1
119# else
120# define EV_USE_INOTIFY 0
121# endif
122# endif
123
124# ifndef EV_USE_EVENTFD
125# if HAVE_EVENTFD
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif
130# endif
131
33#endif 132#endif
34 133
35#include <math.h> 134#include <math.h>
36#include <stdlib.h> 135#include <stdlib.h>
37#include <unistd.h>
38#include <fcntl.h> 136#include <fcntl.h>
39#include <signal.h>
40#include <stddef.h> 137#include <stddef.h>
41 138
42#include <stdio.h> 139#include <stdio.h>
43 140
44#include <assert.h> 141#include <assert.h>
45#include <errno.h> 142#include <errno.h>
46#include <sys/types.h> 143#include <sys/types.h>
144#include <time.h>
145
146#include <signal.h>
147
148#ifdef EV_H
149# include EV_H
150#else
151# include "ev.h"
152#endif
153
47#ifndef WIN32 154#ifndef _WIN32
155# include <sys/time.h>
48# include <sys/wait.h> 156# include <sys/wait.h>
157# include <unistd.h>
158#else
159# define WIN32_LEAN_AND_MEAN
160# include <windows.h>
161# ifndef EV_SELECT_IS_WINSOCKET
162# define EV_SELECT_IS_WINSOCKET 1
49#endif 163# endif
50#include <sys/time.h> 164#endif
51#include <time.h>
52 165
53/**/ 166/* this block tries to deduce configuration from header-defined symbols and defaults */
54 167
55#ifndef EV_USE_MONOTONIC 168#ifndef EV_USE_MONOTONIC
56# define EV_USE_MONOTONIC 1 169# define EV_USE_MONOTONIC 0
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
57#endif 178#endif
58 179
59#ifndef EV_USE_SELECT 180#ifndef EV_USE_SELECT
60# define EV_USE_SELECT 1 181# define EV_USE_SELECT 1
61#endif 182#endif
62 183
63#ifndef EV_USEV_POLL 184#ifndef EV_USE_POLL
64# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */ 185# ifdef _WIN32
186# define EV_USE_POLL 0
187# else
188# define EV_USE_POLL 1
189# endif
65#endif 190#endif
66 191
67#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
68# define EV_USE_EPOLL 0 196# define EV_USE_EPOLL 0
197# endif
69#endif 198#endif
70 199
71#ifndef EV_USE_KQUEUE 200#ifndef EV_USE_KQUEUE
72# define EV_USE_KQUEUE 0 201# define EV_USE_KQUEUE 0
73#endif 202#endif
74 203
75#ifndef EV_USE_REALTIME 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))
76# define EV_USE_REALTIME 1 210# define EV_USE_INOTIFY 1
211# else
212# define EV_USE_INOTIFY 0
77#endif 213# endif
214#endif
78 215
79/**/ 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 */
80 241
81#ifndef CLOCK_MONOTONIC 242#ifndef CLOCK_MONOTONIC
82# undef EV_USE_MONOTONIC 243# undef EV_USE_MONOTONIC
83# define EV_USE_MONOTONIC 0 244# define EV_USE_MONOTONIC 0
84#endif 245#endif
… …
86#ifndef CLOCK_REALTIME 247#ifndef CLOCK_REALTIME
87# undef EV_USE_REALTIME 248# undef EV_USE_REALTIME
88# define EV_USE_REALTIME 0 249# define EV_USE_REALTIME 0
89#endif 250#endif
90 251
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>
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
91/**/ 283/**/
92 284
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 */
294
93#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) */
94#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 296#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
95#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
96/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ 297/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
97 298
98#include "ev.h"
99
100#if __GNUC__ >= 3 299#if __GNUC__ >= 4
101# define expect(expr,value) __builtin_expect ((expr),(value)) 300# define expect(expr,value) __builtin_expect ((expr),(value))
102# define inline inline 301# define noinline __attribute__ ((noinline))
103#else 302#else
104# define expect(expr,value) (expr) 303# define expect(expr,value) (expr)
105# define inline static 304# define noinline
305# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
306# define inline
307# endif
106#endif 308#endif
107 309
108#define expect_false(expr) expect ((expr) != 0, 0) 310#define expect_false(expr) expect ((expr) != 0, 0)
109#define expect_true(expr) expect ((expr) != 0, 1) 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
110 319
111#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 320#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
112#define ABSPRI(w) ((w)->priority - EV_MINPRI) 321#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
113 322
323#define EMPTY /* required for microsofts broken pseudo-c compiler */
324#define EMPTY2(a,b) /* used to suppress some warnings */
325
114typedef struct ev_watcher *W; 326typedef ev_watcher *W;
115typedef struct ev_watcher_list *WL; 327typedef ev_watcher_list *WL;
116typedef struct ev_watcher_time *WT; 328typedef ev_watcher_time *WT;
117 329
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 */
118static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 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
119 342
120/*****************************************************************************/ 343/*****************************************************************************/
121 344
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
122typedef struct 410typedef struct
123{ 411{
124 struct ev_watcher_list *head; 412 WL head;
125 unsigned char events; 413 unsigned char events;
126 unsigned char reify; 414 unsigned char reify;
415#if EV_SELECT_IS_WINSOCKET
416 SOCKET handle;
417#endif
127} ANFD; 418} ANFD;
128 419
129typedef struct 420typedef struct
130{ 421{
131 W w; 422 W w;
132 int events; 423 int events;
133} ANPENDING; 424} ANPENDING;
134 425
426#if EV_USE_INOTIFY
427typedef struct
428{
429 WL head;
430} ANFS;
431#endif
432
135#if EV_MULTIPLICITY 433#if EV_MULTIPLICITY
136 434
137struct ev_loop 435 struct ev_loop
138{ 436 {
437 ev_tstamp ev_rt_now;
438 #define ev_rt_now ((loop)->ev_rt_now)
139# define VAR(name,decl) decl; 439 #define VAR(name,decl) decl;
140# include "ev_vars.h" 440 #include "ev_vars.h"
141};
142# undef VAR 441 #undef VAR
442 };
143# include "ev_wrap.h" 443 #include "ev_wrap.h"
444
445 static struct ev_loop default_loop_struct;
446 struct ev_loop *ev_default_loop_ptr;
144 447
145#else 448#else
146 449
450 ev_tstamp ev_rt_now;
147# define VAR(name,decl) static decl; 451 #define VAR(name,decl) static decl;
148# include "ev_vars.h" 452 #include "ev_vars.h"
149# undef VAR 453 #undef VAR
454
455 static int ev_default_loop_ptr;
150 456
151#endif 457#endif
152 458
153/*****************************************************************************/ 459/*****************************************************************************/
154 460
155inline ev_tstamp 461ev_tstamp
156ev_time (void) 462ev_time (void)
157{ 463{
158#if EV_USE_REALTIME 464#if EV_USE_REALTIME
159 struct timespec ts; 465 struct timespec ts;
160 clock_gettime (CLOCK_REALTIME, &ts); 466 clock_gettime (CLOCK_REALTIME, &ts);
… …
164 gettimeofday (&tv, 0); 470 gettimeofday (&tv, 0);
165 return tv.tv_sec + tv.tv_usec * 1e-6; 471 return tv.tv_sec + tv.tv_usec * 1e-6;
166#endif 472#endif
167} 473}
168 474
169inline ev_tstamp 475ev_tstamp inline_size
170get_clock (void) 476get_clock (void)
171{ 477{
172#if EV_USE_MONOTONIC 478#if EV_USE_MONOTONIC
173 if (expect_true (have_monotonic)) 479 if (expect_true (have_monotonic))
174 { 480 {
… …
179#endif 485#endif
180 486
181 return ev_time (); 487 return ev_time ();
182} 488}
183 489
490#if EV_MULTIPLICITY
184ev_tstamp 491ev_tstamp
185ev_now (EV_P) 492ev_now (EV_P)
186{ 493{
187 return rt_now; 494 return ev_rt_now;
188} 495}
496#endif
189 497
190#define array_roundsize(base,n) ((n) | 4 & ~3) 498void
191 499ev_sleep (ev_tstamp delay)
192#define array_needsize(base,cur,cnt,init) \ 500{
193 if (expect_false ((cnt) > cur)) \ 501 if (delay > 0.)
194 { \
195 int newcnt = cur; \
196 do \
197 { \
198 newcnt = array_roundsize (base, newcnt << 1); \
199 } \
200 while ((cnt) > newcnt); \
201 \
202 base = realloc (base, sizeof (*base) * (newcnt)); \
203 init (base + cur, newcnt - cur); \
204 cur = newcnt; \
205 } 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}
206 522
207/*****************************************************************************/ 523/*****************************************************************************/
208 524
209static void 525#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
526
527int inline_size
528array_nextsize (int elem, int cur, int cnt)
529{
530 int ncur = cur + 1;
531
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
210anfds_init (ANFD *base, int count) 608anfds_init (ANFD *base, int count)
211{ 609{
212 while (count--) 610 while (count--)
213 { 611 {
214 base->head = 0; 612 base->head = 0;
… …
217 615
218 ++base; 616 ++base;
219 } 617 }
220} 618}
221 619
222static void 620void inline_speed
223event (EV_P_ W w, int events)
224{
225 if (w->pending)
226 {
227 pendings [ABSPRI (w)][w->pending - 1].events |= events;
228 return;
229 }
230
231 w->pending = ++pendingcnt [ABSPRI (w)];
232 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
233 pendings [ABSPRI (w)][w->pending - 1].w = w;
234 pendings [ABSPRI (w)][w->pending - 1].events = events;
235}
236
237static void
238queue_events (EV_P_ W *events, int eventcnt, int type)
239{
240 int i;
241
242 for (i = 0; i < eventcnt; ++i)
243 event (EV_A_ events [i], type);
244}
245
246static void
247fd_event (EV_P_ int fd, int events) 621fd_event (EV_P_ int fd, int revents)
248{ 622{
249 ANFD *anfd = anfds + fd; 623 ANFD *anfd = anfds + fd;
250 struct ev_io *w; 624 ev_io *w;
251 625
252 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 626 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
253 { 627 {
254 int ev = w->events & events; 628 int ev = w->events & revents;
255 629
256 if (ev) 630 if (ev)
257 event (EV_A_ (W)w, ev); 631 ev_feed_event (EV_A_ (W)w, ev);
258 } 632 }
259} 633}
260 634
261/*****************************************************************************/ 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}
262 641
263static void 642void inline_size
264fd_reify (EV_P) 643fd_reify (EV_P)
265{ 644{
266 int i; 645 int i;
267 646
268 for (i = 0; i < fdchangecnt; ++i) 647 for (i = 0; i < fdchangecnt; ++i)
269 { 648 {
270 int fd = fdchanges [i]; 649 int fd = fdchanges [i];
271 ANFD *anfd = anfds + fd; 650 ANFD *anfd = anfds + fd;
272 struct ev_io *w; 651 ev_io *w;
273 652
274 int events = 0; 653 unsigned char events = 0;
275 654
276 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 655 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
277 events |= w->events; 656 events |= (unsigned char)w->events;
278 657
279 anfd->reify = 0; 658#if EV_SELECT_IS_WINSOCKET
280 659 if (events)
281 if (anfd->events != events)
282 { 660 {
283 method_modify (EV_A_ fd, anfd->events, events); 661 unsigned long argp;
284 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));
285 } 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 }
286 } 681 }
287 682
288 fdchangecnt = 0; 683 fdchangecnt = 0;
289} 684}
290 685
291static void 686void inline_size
292fd_change (EV_P_ int fd) 687fd_change (EV_P_ int fd, int flags)
293{ 688{
294 if (anfds [fd].reify || fdchangecnt < 0) 689 unsigned char reify = anfds [fd].reify;
295 return;
296
297 anfds [fd].reify = 1; 690 anfds [fd].reify |= flags;
298 691
692 if (expect_true (!reify))
693 {
299 ++fdchangecnt; 694 ++fdchangecnt;
300 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 695 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
301 fdchanges [fdchangecnt - 1] = fd; 696 fdchanges [fdchangecnt - 1] = fd;
697 }
302} 698}
303 699
304static void 700void inline_speed
305fd_kill (EV_P_ int fd) 701fd_kill (EV_P_ int fd)
306{ 702{
307 struct ev_io *w; 703 ev_io *w;
308 704
309 while ((w = (struct ev_io *)anfds [fd].head)) 705 while ((w = (ev_io *)anfds [fd].head))
310 { 706 {
311 ev_io_stop (EV_A_ w); 707 ev_io_stop (EV_A_ w);
312 event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 708 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
313 } 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
314} 720}
315 721
316/* called on EBADF to verify fds */ 722/* called on EBADF to verify fds */
317static void 723static void noinline
318fd_ebadf (EV_P) 724fd_ebadf (EV_P)
319{ 725{
320 int fd; 726 int fd;
321 727
322 for (fd = 0; fd < anfdmax; ++fd) 728 for (fd = 0; fd < anfdmax; ++fd)
323 if (anfds [fd].events) 729 if (anfds [fd].events)
324 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 730 if (!fd_valid (fd) == -1 && errno == EBADF)
325 fd_kill (EV_A_ fd); 731 fd_kill (EV_A_ fd);
326} 732}
327 733
328/* called on ENOMEM in select/poll to kill some fds and retry */ 734/* called on ENOMEM in select/poll to kill some fds and retry */
329static void 735static void noinline
330fd_enomem (EV_P) 736fd_enomem (EV_P)
331{ 737{
332 int fd = anfdmax; 738 int fd;
333 739
334 while (fd--) 740 for (fd = anfdmax; fd--; )
335 if (anfds [fd].events) 741 if (anfds [fd].events)
336 { 742 {
337 close (fd);
338 fd_kill (EV_A_ fd); 743 fd_kill (EV_A_ fd);
339 return; 744 return;
340 } 745 }
341} 746}
342 747
343/* susually called after fork if method needs to re-arm all fds from scratch */ 748/* usually called after fork if backend needs to re-arm all fds from scratch */
344static void 749static void noinline
345fd_rearm_all (EV_P) 750fd_rearm_all (EV_P)
346{ 751{
347 int fd; 752 int fd;
348 753
349 /* this should be highly optimised to not do anything but set a flag */
350 for (fd = 0; fd < anfdmax; ++fd) 754 for (fd = 0; fd < anfdmax; ++fd)
351 if (anfds [fd].events) 755 if (anfds [fd].events)
352 { 756 {
353 anfds [fd].events = 0; 757 anfds [fd].events = 0;
354 fd_change (fd); 758 fd_change (EV_A_ fd, EV_IOFDSET | 1);
355 } 759 }
356} 760}
357 761
358/*****************************************************************************/ 762/*****************************************************************************/
359 763
360static void 764/*
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#if USE_4HEAP
772
773#define HEAP0 3 /* index of first element in heap */
774
775/* towards the root */
776void inline_speed
361upheap (WT *heap, int k) 777upheap (WT *heap, int k)
362{ 778{
363 WT w = heap [k]; 779 WT w = heap [k];
364 780
365 while (k && heap [k >> 1]->at > w->at) 781 for (;;)
366 { 782 {
783 int p = ((k - HEAP0 - 1) / 4) + HEAP0;
784
785 if (p >= HEAP0 || heap [p]->at <= w->at)
786 break;
787
367 heap [k] = heap [k >> 1]; 788 heap [k] = heap [p];
368 heap [k]->active = k + 1; 789 ev_active (heap [k]) = k;
369 k >>= 1; 790 k = p;
370 } 791 }
371 792
372 heap [k] = w; 793 heap [k] = w;
373 heap [k]->active = k + 1; 794 ev_active (heap [k]) = k;
374
375} 795}
376 796
377static void 797/* away from the root */
798void inline_speed
378downheap (WT *heap, int N, int k) 799downheap (WT *heap, int N, int k)
379{ 800{
380 WT w = heap [k]; 801 WT w = heap [k];
802 WT *E = heap + N + HEAP0;
381 803
382 while (k < (N >> 1)) 804 for (;;)
383 { 805 {
384 int j = k << 1; 806 ev_tstamp minat;
807 WT *minpos;
808 WT *pos = heap + 4 * (k - HEAP0) + HEAP0;
385 809
386 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 810 // find minimum child
811 if (expect_true (pos +3 < E))
387 ++j; 812 {
813 (minpos = pos + 0), (minat = (*minpos)->at);
814 if (pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
815 if (pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
816 if (pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
817 }
818 else
819 {
820 if (pos >= E)
821 break;
388 822
823 (minpos = pos + 0), (minat = (*minpos)->at);
824 if (pos + 1 < E && pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
825 if (pos + 2 < E && pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
826 if (pos + 3 < E && pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
827 }
828
389 if (w->at <= heap [j]->at) 829 if (w->at <= minat)
390 break; 830 break;
391 831
392 heap [k] = heap [j]; 832 ev_active (*minpos) = k;
393 heap [k]->active = k + 1; 833 heap [k] = *minpos;
394 k = j; 834
835 k = minpos - heap;
395 } 836 }
396 837
397 heap [k] = w; 838 heap [k] = w;
839 ev_active (heap [k]) = k;
840}
841
842#else // 4HEAP
843
844#define HEAP0 1
845
846/* towards the root */
847void inline_speed
848upheap (WT *heap, int k)
849{
850 WT w = heap [k];
851
852 for (;;)
853 {
854 int p = k >> 1;
855
856 /* maybe we could use a dummy element at heap [0]? */
857 if (!p || heap [p]->at <= w->at)
858 break;
859
860 heap [k] = heap [p];
861 ev_active (heap [k]) = k;
862 k = p;
863 }
864
865 heap [k] = w;
866 ev_active (heap [k]) = k;
867}
868
869/* away from the root */
870void inline_speed
871downheap (WT *heap, int N, int k)
872{
873 WT w = heap [k];
874
875 for (;;)
876 {
877 int c = k << 1;
878
879 if (c > N)
880 break;
881
882 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
883 ? 1 : 0;
884
885 if (w->at <= heap [c]->at)
886 break;
887
888 heap [k] = heap [c];
398 heap [k]->active = k + 1; 889 ((W)heap [k])->active = k;
890
891 k = c;
892 }
893
894 heap [k] = w;
895 ev_active (heap [k]) = k;
896}
897#endif
898
899void inline_size
900adjustheap (WT *heap, int N, int k)
901{
902 upheap (heap, k);
903 downheap (heap, N, k);
399} 904}
400 905
401/*****************************************************************************/ 906/*****************************************************************************/
402 907
403typedef struct 908typedef struct
404{ 909{
405 struct ev_watcher_list *head; 910 WL head;
406 sig_atomic_t volatile gotsig; 911 EV_ATOMIC_T gotsig;
407} ANSIG; 912} ANSIG;
408 913
409static ANSIG *signals; 914static ANSIG *signals;
410static int signalmax; 915static int signalmax;
411 916
412static int sigpipe [2]; 917static EV_ATOMIC_T gotsig;
413static sig_atomic_t volatile gotsig;
414 918
415static void 919void inline_size
416signals_init (ANSIG *base, int count) 920signals_init (ANSIG *base, int count)
417{ 921{
418 while (count--) 922 while (count--)
419 { 923 {
420 base->head = 0; 924 base->head = 0;
… …
422 926
423 ++base; 927 ++base;
424 } 928 }
425} 929}
426 930
931/*****************************************************************************/
932
933void inline_speed
934fd_intern (int fd)
935{
936#ifdef _WIN32
937 int arg = 1;
938 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
939#else
940 fcntl (fd, F_SETFD, FD_CLOEXEC);
941 fcntl (fd, F_SETFL, O_NONBLOCK);
942#endif
943}
944
945static void noinline
946evpipe_init (EV_P)
947{
948 if (!ev_is_active (&pipeev))
949 {
950#if EV_USE_EVENTFD
951 if ((evfd = eventfd (0, 0)) >= 0)
952 {
953 evpipe [0] = -1;
954 fd_intern (evfd);
955 ev_io_set (&pipeev, evfd, EV_READ);
956 }
957 else
958#endif
959 {
960 while (pipe (evpipe))
961 syserr ("(libev) error creating signal/async pipe");
962
963 fd_intern (evpipe [0]);
964 fd_intern (evpipe [1]);
965 ev_io_set (&pipeev, evpipe [0], EV_READ);
966 }
967
968 ev_io_start (EV_A_ &pipeev);
969 ev_unref (EV_A); /* watcher should not keep loop alive */
970 }
971}
972
973void inline_size
974evpipe_write (EV_P_ EV_ATOMIC_T *flag)
975{
976 if (!*flag)
977 {
978 int old_errno = errno; /* save errno because write might clobber it */
979
980 *flag = 1;
981
982#if EV_USE_EVENTFD
983 if (evfd >= 0)
984 {
985 uint64_t counter = 1;
986 write (evfd, &counter, sizeof (uint64_t));
987 }
988 else
989#endif
990 write (evpipe [1], &old_errno, 1);
991
992 errno = old_errno;
993 }
994}
995
427static void 996static void
997pipecb (EV_P_ ev_io *iow, int revents)
998{
999#if EV_USE_EVENTFD
1000 if (evfd >= 0)
1001 {
1002 uint64_t counter;
1003 read (evfd, &counter, sizeof (uint64_t));
1004 }
1005 else
1006#endif
1007 {
1008 char dummy;
1009 read (evpipe [0], &dummy, 1);
1010 }
1011
1012 if (gotsig && ev_is_default_loop (EV_A))
1013 {
1014 int signum;
1015 gotsig = 0;
1016
1017 for (signum = signalmax; signum--; )
1018 if (signals [signum].gotsig)
1019 ev_feed_signal_event (EV_A_ signum + 1);
1020 }
1021
1022#if EV_ASYNC_ENABLE
1023 if (gotasync)
1024 {
1025 int i;
1026 gotasync = 0;
1027
1028 for (i = asynccnt; i--; )
1029 if (asyncs [i]->sent)
1030 {
1031 asyncs [i]->sent = 0;
1032 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1033 }
1034 }
1035#endif
1036}
1037
1038/*****************************************************************************/
1039
1040static void
428sighandler (int signum) 1041ev_sighandler (int signum)
429{ 1042{
1043#if EV_MULTIPLICITY
1044 struct ev_loop *loop = &default_loop_struct;
1045#endif
1046
1047#if _WIN32
1048 signal (signum, ev_sighandler);
1049#endif
1050
430 signals [signum - 1].gotsig = 1; 1051 signals [signum - 1].gotsig = 1;
431 1052 evpipe_write (EV_A_ &gotsig);
432 if (!gotsig)
433 {
434 int old_errno = errno;
435 gotsig = 1;
436 write (sigpipe [1], &signum, 1);
437 errno = old_errno;
438 }
439} 1053}
440 1054
441static void 1055void noinline
442sigcb (EV_P_ struct ev_io *iow, int revents) 1056ev_feed_signal_event (EV_P_ int signum)
443{ 1057{
444 struct ev_watcher_list *w; 1058 WL w;
1059
1060#if EV_MULTIPLICITY
1061 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1062#endif
1063
445 int signum; 1064 --signum;
446 1065
447 read (sigpipe [0], &revents, 1); 1066 if (signum < 0 || signum >= signalmax)
448 gotsig = 0; 1067 return;
449 1068
450 for (signum = signalmax; signum--; )
451 if (signals [signum].gotsig)
452 {
453 signals [signum].gotsig = 0; 1069 signals [signum].gotsig = 0;
454 1070
455 for (w = signals [signum].head; w; w = w->next) 1071 for (w = signals [signum].head; w; w = w->next)
456 event (EV_A_ (W)w, EV_SIGNAL); 1072 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
457 }
458}
459
460static void
461siginit (EV_P)
462{
463#ifndef WIN32
464 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
465 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
466
467 /* rather than sort out wether we really need nb, set it */
468 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
469 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
470#endif
471
472 ev_io_set (&sigev, sigpipe [0], EV_READ);
473 ev_io_start (EV_A_ &sigev);
474 ev_unref (EV_A); /* child watcher should not keep loop alive */
475} 1073}
476 1074
477/*****************************************************************************/ 1075/*****************************************************************************/
478 1076
1077static WL childs [EV_PID_HASHSIZE];
1078
479#ifndef WIN32 1079#ifndef _WIN32
1080
1081static ev_signal childev;
1082
1083#ifndef WIFCONTINUED
1084# define WIFCONTINUED(status) 0
1085#endif
1086
1087void inline_speed
1088child_reap (EV_P_ int chain, int pid, int status)
1089{
1090 ev_child *w;
1091 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1092
1093 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1094 {
1095 if ((w->pid == pid || !w->pid)
1096 && (!traced || (w->flags & 1)))
1097 {
1098 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1099 w->rpid = pid;
1100 w->rstatus = status;
1101 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1102 }
1103 }
1104}
480 1105
481#ifndef WCONTINUED 1106#ifndef WCONTINUED
482# define WCONTINUED 0 1107# define WCONTINUED 0
483#endif 1108#endif
484 1109
485static void 1110static void
486child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
487{
488 struct ev_child *w;
489
490 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
491 if (w->pid == pid || !w->pid)
492 {
493 w->priority = sw->priority; /* need to do it *now* */
494 w->rpid = pid;
495 w->rstatus = status;
496 event (EV_A_ (W)w, EV_CHILD);
497 }
498}
499
500static void
501childcb (EV_P_ struct ev_signal *sw, int revents) 1111childcb (EV_P_ ev_signal *sw, int revents)
502{ 1112{
503 int pid, status; 1113 int pid, status;
504 1114
1115 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
505 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1116 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
506 { 1117 if (!WCONTINUED
1118 || errno != EINVAL
1119 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1120 return;
1121
507 /* make sure we are called again until all childs have been reaped */ 1122 /* make sure we are called again until all children have been reaped */
1123 /* we need to do it this way so that the callback gets called before we continue */
508 event (EV_A_ (W)sw, EV_SIGNAL); 1124 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
509 1125
510 child_reap (EV_A_ sw, pid, pid, status); 1126 child_reap (EV_A_ pid, pid, status);
1127 if (EV_PID_HASHSIZE > 1)
511 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1128 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
512 }
513} 1129}
514 1130
515#endif 1131#endif
516 1132
517/*****************************************************************************/ 1133/*****************************************************************************/
518 1134
1135#if EV_USE_PORT
1136# include "ev_port.c"
1137#endif
519#if EV_USE_KQUEUE 1138#if EV_USE_KQUEUE
520# include "ev_kqueue.c" 1139# include "ev_kqueue.c"
521#endif 1140#endif
522#if EV_USE_EPOLL 1141#if EV_USE_EPOLL
523# include "ev_epoll.c" 1142# include "ev_epoll.c"
524#endif 1143#endif
525#if EV_USEV_POLL 1144#if EV_USE_POLL
526# include "ev_poll.c" 1145# include "ev_poll.c"
527#endif 1146#endif
528#if EV_USE_SELECT 1147#if EV_USE_SELECT
529# include "ev_select.c" 1148# include "ev_select.c"
530#endif 1149#endif
… …
540{ 1159{
541 return EV_VERSION_MINOR; 1160 return EV_VERSION_MINOR;
542} 1161}
543 1162
544/* return true if we are running with elevated privileges and should ignore env variables */ 1163/* return true if we are running with elevated privileges and should ignore env variables */
545static int 1164int inline_size
546enable_secure (void) 1165enable_secure (void)
547{ 1166{
548#ifdef WIN32 1167#ifdef _WIN32
549 return 0; 1168 return 0;
550#else 1169#else
551 return getuid () != geteuid () 1170 return getuid () != geteuid ()
552 || getgid () != getegid (); 1171 || getgid () != getegid ();
553#endif 1172#endif
554} 1173}
555 1174
556int 1175unsigned int
557ev_method (EV_P) 1176ev_supported_backends (void)
558{ 1177{
559 return method; 1178 unsigned int flags = 0;
560}
561 1179
562static void 1180 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
563loop_init (EV_P_ int methods) 1181 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1182 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1183 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1184 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1185
1186 return flags;
1187}
1188
1189unsigned int
1190ev_recommended_backends (void)
564{ 1191{
565 if (!method) 1192 unsigned int flags = ev_supported_backends ();
1193
1194#ifndef __NetBSD__
1195 /* kqueue is borked on everything but netbsd apparently */
1196 /* it usually doesn't work correctly on anything but sockets and pipes */
1197 flags &= ~EVBACKEND_KQUEUE;
1198#endif
1199#ifdef __APPLE__
1200 // flags &= ~EVBACKEND_KQUEUE; for documentation
1201 flags &= ~EVBACKEND_POLL;
1202#endif
1203
1204 return flags;
1205}
1206
1207unsigned int
1208ev_embeddable_backends (void)
1209{
1210 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1211
1212 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1213 /* please fix it and tell me how to detect the fix */
1214 flags &= ~EVBACKEND_EPOLL;
1215
1216 return flags;
1217}
1218
1219unsigned int
1220ev_backend (EV_P)
1221{
1222 return backend;
1223}
1224
1225unsigned int
1226ev_loop_count (EV_P)
1227{
1228 return loop_count;
1229}
1230
1231void
1232ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1233{
1234 io_blocktime = interval;
1235}
1236
1237void
1238ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1239{
1240 timeout_blocktime = interval;
1241}
1242
1243static void noinline
1244loop_init (EV_P_ unsigned int flags)
1245{
1246 if (!backend)
566 { 1247 {
567#if EV_USE_MONOTONIC 1248#if EV_USE_MONOTONIC
568 { 1249 {
569 struct timespec ts; 1250 struct timespec ts;
570 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1251 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
571 have_monotonic = 1; 1252 have_monotonic = 1;
572 } 1253 }
573#endif 1254#endif
574 1255
575 rt_now = ev_time (); 1256 ev_rt_now = ev_time ();
576 mn_now = get_clock (); 1257 mn_now = get_clock ();
577 now_floor = mn_now; 1258 now_floor = mn_now;
578 rtmn_diff = rt_now - mn_now; 1259 rtmn_diff = ev_rt_now - mn_now;
579 1260
580 if (methods == EVMETHOD_AUTO) 1261 io_blocktime = 0.;
581 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1262 timeout_blocktime = 0.;
1263 backend = 0;
1264 backend_fd = -1;
1265 gotasync = 0;
1266#if EV_USE_INOTIFY
1267 fs_fd = -2;
1268#endif
1269
1270 /* pid check not overridable via env */
1271#ifndef _WIN32
1272 if (flags & EVFLAG_FORKCHECK)
1273 curpid = getpid ();
1274#endif
1275
1276 if (!(flags & EVFLAG_NOENV)
1277 && !enable_secure ()
1278 && getenv ("LIBEV_FLAGS"))
582 methods = atoi (getenv ("LIBEV_METHODS")); 1279 flags = atoi (getenv ("LIBEV_FLAGS"));
583 else
584 methods = EVMETHOD_ANY;
585 1280
586 method = 0; 1281 if (!(flags & 0x0000ffffU))
1282 flags |= ev_recommended_backends ();
1283
1284#if EV_USE_PORT
1285 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1286#endif
587#if EV_USE_KQUEUE 1287#if EV_USE_KQUEUE
588 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 1288 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
589#endif 1289#endif
590#if EV_USE_EPOLL 1290#if EV_USE_EPOLL
591 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 1291 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
592#endif 1292#endif
593#if EV_USEV_POLL 1293#if EV_USE_POLL
594 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 1294 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
595#endif 1295#endif
596#if EV_USE_SELECT 1296#if EV_USE_SELECT
597 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 1297 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
598#endif 1298#endif
599 }
600}
601 1299
602void 1300 ev_init (&pipeev, pipecb);
1301 ev_set_priority (&pipeev, EV_MAXPRI);
1302 }
1303}
1304
1305static void noinline
603loop_destroy (EV_P) 1306loop_destroy (EV_P)
604{ 1307{
1308 int i;
1309
1310 if (ev_is_active (&pipeev))
1311 {
1312 ev_ref (EV_A); /* signal watcher */
1313 ev_io_stop (EV_A_ &pipeev);
1314
1315#if EV_USE_EVENTFD
1316 if (evfd >= 0)
1317 close (evfd);
1318#endif
1319
1320 if (evpipe [0] >= 0)
1321 {
1322 close (evpipe [0]);
1323 close (evpipe [1]);
1324 }
1325 }
1326
1327#if EV_USE_INOTIFY
1328 if (fs_fd >= 0)
1329 close (fs_fd);
1330#endif
1331
1332 if (backend_fd >= 0)
1333 close (backend_fd);
1334
1335#if EV_USE_PORT
1336 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1337#endif
605#if EV_USE_KQUEUE 1338#if EV_USE_KQUEUE
606 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1339 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
607#endif 1340#endif
608#if EV_USE_EPOLL 1341#if EV_USE_EPOLL
609 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1342 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
610#endif 1343#endif
611#if EV_USEV_POLL 1344#if EV_USE_POLL
612 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1345 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
613#endif 1346#endif
614#if EV_USE_SELECT 1347#if EV_USE_SELECT
615 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1348 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
616#endif 1349#endif
617 1350
618 method = 0; 1351 for (i = NUMPRI; i--; )
619 /*TODO*/ 1352 {
620} 1353 array_free (pending, [i]);
1354#if EV_IDLE_ENABLE
1355 array_free (idle, [i]);
1356#endif
1357 }
621 1358
622void 1359 ev_free (anfds); anfdmax = 0;
1360
1361 /* have to use the microsoft-never-gets-it-right macro */
1362 array_free (fdchange, EMPTY);
1363 array_free (timer, EMPTY);
1364#if EV_PERIODIC_ENABLE
1365 array_free (periodic, EMPTY);
1366#endif
1367#if EV_FORK_ENABLE
1368 array_free (fork, EMPTY);
1369#endif
1370 array_free (prepare, EMPTY);
1371 array_free (check, EMPTY);
1372#if EV_ASYNC_ENABLE
1373 array_free (async, EMPTY);
1374#endif
1375
1376 backend = 0;
1377}
1378
1379#if EV_USE_INOTIFY
1380void inline_size infy_fork (EV_P);
1381#endif
1382
1383void inline_size
623loop_fork (EV_P) 1384loop_fork (EV_P)
624{ 1385{
625 /*TODO*/ 1386#if EV_USE_PORT
1387 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1388#endif
1389#if EV_USE_KQUEUE
1390 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1391#endif
626#if EV_USE_EPOLL 1392#if EV_USE_EPOLL
627 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1393 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
628#endif 1394#endif
629#if EV_USE_KQUEUE 1395#if EV_USE_INOTIFY
630 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 1396 infy_fork (EV_A);
631#endif 1397#endif
1398
1399 if (ev_is_active (&pipeev))
1400 {
1401 /* this "locks" the handlers against writing to the pipe */
1402 /* while we modify the fd vars */
1403 gotsig = 1;
1404#if EV_ASYNC_ENABLE
1405 gotasync = 1;
1406#endif
1407
1408 ev_ref (EV_A);
1409 ev_io_stop (EV_A_ &pipeev);
1410
1411#if EV_USE_EVENTFD
1412 if (evfd >= 0)
1413 close (evfd);
1414#endif
1415
1416 if (evpipe [0] >= 0)
1417 {
1418 close (evpipe [0]);
1419 close (evpipe [1]);
1420 }
1421
1422 evpipe_init (EV_A);
1423 /* now iterate over everything, in case we missed something */
1424 pipecb (EV_A_ &pipeev, EV_READ);
1425 }
1426
1427 postfork = 0;
632} 1428}
633 1429
634#if EV_MULTIPLICITY 1430#if EV_MULTIPLICITY
635struct ev_loop * 1431struct ev_loop *
636ev_loop_new (int methods) 1432ev_loop_new (unsigned int flags)
637{ 1433{
638 struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop)); 1434 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
639 1435
1436 memset (loop, 0, sizeof (struct ev_loop));
1437
640 loop_init (EV_A_ methods); 1438 loop_init (EV_A_ flags);
641 1439
642 if (ev_methods (EV_A)) 1440 if (ev_backend (EV_A))
643 return loop; 1441 return loop;
644 1442
645 return 0; 1443 return 0;
646} 1444}
647 1445
648void 1446void
649ev_loop_destroy (EV_P) 1447ev_loop_destroy (EV_P)
650{ 1448{
651 loop_destroy (EV_A); 1449 loop_destroy (EV_A);
652 free (loop); 1450 ev_free (loop);
653} 1451}
654 1452
655void 1453void
656ev_loop_fork (EV_P) 1454ev_loop_fork (EV_P)
657{ 1455{
658 loop_fork (EV_A); 1456 postfork = 1; /* must be in line with ev_default_fork */
659} 1457}
660
661#endif 1458#endif
662 1459
663#if EV_MULTIPLICITY 1460#if EV_MULTIPLICITY
664struct ev_loop default_loop_struct;
665static struct ev_loop *default_loop;
666
667struct ev_loop * 1461struct ev_loop *
1462ev_default_loop_init (unsigned int flags)
668#else 1463#else
669static int default_loop;
670
671int 1464int
1465ev_default_loop (unsigned int flags)
672#endif 1466#endif
673ev_default_loop (int methods)
674{ 1467{
675 if (sigpipe [0] == sigpipe [1])
676 if (pipe (sigpipe))
677 return 0;
678
679 if (!default_loop) 1468 if (!ev_default_loop_ptr)
680 { 1469 {
681#if EV_MULTIPLICITY 1470#if EV_MULTIPLICITY
682 struct ev_loop *loop = default_loop = &default_loop_struct; 1471 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
683#else 1472#else
684 default_loop = 1; 1473 ev_default_loop_ptr = 1;
685#endif 1474#endif
686 1475
687 loop_init (EV_A_ methods); 1476 loop_init (EV_A_ flags);
688 1477
689 if (ev_method (EV_A)) 1478 if (ev_backend (EV_A))
690 { 1479 {
691 ev_watcher_init (&sigev, sigcb);
692 ev_set_priority (&sigev, EV_MAXPRI);
693 siginit (EV_A);
694
695#ifndef WIN32 1480#ifndef _WIN32
696 ev_signal_init (&childev, childcb, SIGCHLD); 1481 ev_signal_init (&childev, childcb, SIGCHLD);
697 ev_set_priority (&childev, EV_MAXPRI); 1482 ev_set_priority (&childev, EV_MAXPRI);
698 ev_signal_start (EV_A_ &childev); 1483 ev_signal_start (EV_A_ &childev);
699 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1484 ev_unref (EV_A); /* child watcher should not keep loop alive */
700#endif 1485#endif
701 } 1486 }
702 else 1487 else
703 default_loop = 0; 1488 ev_default_loop_ptr = 0;
704 } 1489 }
705 1490
706 return default_loop; 1491 return ev_default_loop_ptr;
707} 1492}
708 1493
709void 1494void
710ev_default_destroy (void) 1495ev_default_destroy (void)
711{ 1496{
1497#if EV_MULTIPLICITY
712 struct ev_loop *loop = default_loop; 1498 struct ev_loop *loop = ev_default_loop_ptr;
1499#endif
713 1500
1501#ifndef _WIN32
714 ev_ref (EV_A); /* child watcher */ 1502 ev_ref (EV_A); /* child watcher */
715 ev_signal_stop (EV_A_ &childev); 1503 ev_signal_stop (EV_A_ &childev);
716 1504#endif
717 ev_ref (EV_A); /* signal watcher */
718 ev_io_stop (EV_A_ &sigev);
719
720 close (sigpipe [0]); sigpipe [0] = 0;
721 close (sigpipe [1]); sigpipe [1] = 0;
722 1505
723 loop_destroy (EV_A); 1506 loop_destroy (EV_A);
724} 1507}
725 1508
726void 1509void
727ev_default_fork (EV_P) 1510ev_default_fork (void)
728{ 1511{
729 loop_fork (EV_A); 1512#if EV_MULTIPLICITY
1513 struct ev_loop *loop = ev_default_loop_ptr;
1514#endif
730 1515
731 ev_io_stop (EV_A_ &sigev); 1516 if (backend)
732 close (sigpipe [0]); 1517 postfork = 1; /* must be in line with ev_loop_fork */
733 close (sigpipe [1]);
734 pipe (sigpipe);
735
736 ev_ref (EV_A); /* signal watcher */
737 siginit (EV_A);
738} 1518}
739 1519
740/*****************************************************************************/ 1520/*****************************************************************************/
741 1521
742static void 1522void
1523ev_invoke (EV_P_ void *w, int revents)
1524{
1525 EV_CB_INVOKE ((W)w, revents);
1526}
1527
1528void inline_speed
743call_pending (EV_P) 1529call_pending (EV_P)
744{ 1530{
745 int pri; 1531 int pri;
746 1532
747 for (pri = NUMPRI; pri--; ) 1533 for (pri = NUMPRI; pri--; )
748 while (pendingcnt [pri]) 1534 while (pendingcnt [pri])
749 { 1535 {
750 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1536 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
751 1537
752 if (p->w) 1538 if (expect_true (p->w))
753 { 1539 {
1540 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1541
754 p->w->pending = 0; 1542 p->w->pending = 0;
755 p->w->cb (EV_A_ p->w, p->events); 1543 EV_CB_INVOKE (p->w, p->events);
756 } 1544 }
757 } 1545 }
758} 1546}
759 1547
760static void 1548#if EV_IDLE_ENABLE
1549void inline_size
1550idle_reify (EV_P)
1551{
1552 if (expect_false (idleall))
1553 {
1554 int pri;
1555
1556 for (pri = NUMPRI; pri--; )
1557 {
1558 if (pendingcnt [pri])
1559 break;
1560
1561 if (idlecnt [pri])
1562 {
1563 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1564 break;
1565 }
1566 }
1567 }
1568}
1569#endif
1570
1571void inline_size
761timers_reify (EV_P) 1572timers_reify (EV_P)
762{ 1573{
763 while (timercnt && timers [0]->at <= mn_now) 1574 while (timercnt && ev_at (timers [HEAP0]) <= mn_now)
764 { 1575 {
765 struct ev_timer *w = timers [0]; 1576 ev_timer *w = (ev_timer *)timers [HEAP0];
1577
1578 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
766 1579
767 /* first reschedule or stop timer */ 1580 /* first reschedule or stop timer */
768 if (w->repeat) 1581 if (w->repeat)
769 { 1582 {
770 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1583 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
771 w->at = mn_now + w->repeat; 1584
1585 ev_at (w) += w->repeat;
1586 if (ev_at (w) < mn_now)
1587 ev_at (w) = mn_now;
1588
772 downheap ((WT *)timers, timercnt, 0); 1589 downheap (timers, timercnt, HEAP0);
773 } 1590 }
774 else 1591 else
775 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1592 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
776 1593
777 event (EV_A_ (W)w, EV_TIMEOUT); 1594 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
778 } 1595 }
779} 1596}
780 1597
781static void 1598#if EV_PERIODIC_ENABLE
1599void inline_size
782periodics_reify (EV_P) 1600periodics_reify (EV_P)
783{ 1601{
784 while (periodiccnt && periodics [0]->at <= rt_now) 1602 while (periodiccnt && ev_at (periodics [HEAP0]) <= ev_rt_now)
785 { 1603 {
786 struct ev_periodic *w = periodics [0]; 1604 ev_periodic *w = (ev_periodic *)periodics [HEAP0];
1605
1606 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
787 1607
788 /* first reschedule or stop timer */ 1608 /* first reschedule or stop timer */
789 if (w->interval) 1609 if (w->reschedule_cb)
790 { 1610 {
1611 ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1612 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
1613 downheap (periodics, periodiccnt, 1);
1614 }
1615 else if (w->interval)
1616 {
791 w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval; 1617 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1618 if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
792 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now)); 1619 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
793 downheap ((WT *)periodics, periodiccnt, 0); 1620 downheap (periodics, periodiccnt, HEAP0);
794 } 1621 }
795 else 1622 else
796 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1623 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
797 1624
798 event (EV_A_ (W)w, EV_PERIODIC); 1625 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
799 } 1626 }
800} 1627}
801 1628
802static void 1629static void noinline
803periodics_reschedule (EV_P) 1630periodics_reschedule (EV_P)
804{ 1631{
805 int i; 1632 int i;
806 1633
807 /* adjust periodics after time jump */ 1634 /* adjust periodics after time jump */
808 for (i = 0; i < periodiccnt; ++i) 1635 for (i = 1; i <= periodiccnt; ++i)
809 { 1636 {
810 struct ev_periodic *w = periodics [i]; 1637 ev_periodic *w = (ev_periodic *)periodics [i];
811 1638
1639 if (w->reschedule_cb)
1640 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
812 if (w->interval) 1641 else if (w->interval)
813 {
814 ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval; 1642 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
815
816 if (fabs (diff) >= 1e-4)
817 {
818 ev_periodic_stop (EV_A_ w);
819 ev_periodic_start (EV_A_ w);
820
821 i = 0; /* restart loop, inefficient, but time jumps should be rare */
822 }
823 }
824 }
825}
826
827inline int
828time_update_monotonic (EV_P)
829{
830 mn_now = get_clock ();
831
832 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
833 { 1643 }
834 rt_now = rtmn_diff + mn_now;
835 return 0;
836 }
837 else
838 {
839 now_floor = mn_now;
840 rt_now = ev_time ();
841 return 1;
842 }
843}
844 1644
845static void 1645 /* now rebuild the heap */
846time_update (EV_P) 1646 for (i = periodiccnt >> 1; --i; )
1647 downheap (periodics, periodiccnt, i + HEAP0);
1648}
1649#endif
1650
1651void inline_speed
1652time_update (EV_P_ ev_tstamp max_block)
847{ 1653{
848 int i; 1654 int i;
849 1655
850#if EV_USE_MONOTONIC 1656#if EV_USE_MONOTONIC
851 if (expect_true (have_monotonic)) 1657 if (expect_true (have_monotonic))
852 { 1658 {
853 if (time_update_monotonic (EV_A)) 1659 ev_tstamp odiff = rtmn_diff;
1660
1661 mn_now = get_clock ();
1662
1663 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1664 /* interpolate in the meantime */
1665 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
854 { 1666 {
855 ev_tstamp odiff = rtmn_diff; 1667 ev_rt_now = rtmn_diff + mn_now;
1668 return;
1669 }
856 1670
1671 now_floor = mn_now;
1672 ev_rt_now = ev_time ();
1673
857 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1674 /* loop a few times, before making important decisions.
1675 * on the choice of "4": one iteration isn't enough,
1676 * in case we get preempted during the calls to
1677 * ev_time and get_clock. a second call is almost guaranteed
1678 * to succeed in that case, though. and looping a few more times
1679 * doesn't hurt either as we only do this on time-jumps or
1680 * in the unlikely event of having been preempted here.
1681 */
1682 for (i = 4; --i; )
858 { 1683 {
859 rtmn_diff = rt_now - mn_now; 1684 rtmn_diff = ev_rt_now - mn_now;
860 1685
861 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1686 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
862 return; /* all is well */ 1687 return; /* all is well */
863 1688
864 rt_now = ev_time (); 1689 ev_rt_now = ev_time ();
865 mn_now = get_clock (); 1690 mn_now = get_clock ();
866 now_floor = mn_now; 1691 now_floor = mn_now;
867 } 1692 }
868 1693
1694# if EV_PERIODIC_ENABLE
1695 periodics_reschedule (EV_A);
1696# endif
1697 /* no timer adjustment, as the monotonic clock doesn't jump */
1698 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1699 }
1700 else
1701#endif
1702 {
1703 ev_rt_now = ev_time ();
1704
1705 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1706 {
1707#if EV_PERIODIC_ENABLE
869 periodics_reschedule (EV_A); 1708 periodics_reschedule (EV_A);
870 /* no timer adjustment, as the monotonic clock doesn't jump */ 1709#endif
871 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */ 1710 /* adjust timers. this is easy, as the offset is the same for all of them */
1711 for (i = 1; i <= timercnt; ++i)
1712 ev_at (timers [i]) += ev_rt_now - mn_now;
872 } 1713 }
873 }
874 else
875#endif
876 {
877 rt_now = ev_time ();
878 1714
879 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
880 {
881 periodics_reschedule (EV_A);
882
883 /* adjust timers. this is easy, as the offset is the same for all */
884 for (i = 0; i < timercnt; ++i)
885 timers [i]->at += rt_now - mn_now;
886 }
887
888 mn_now = rt_now; 1715 mn_now = ev_rt_now;
889 } 1716 }
890} 1717}
891 1718
892void 1719void
893ev_ref (EV_P) 1720ev_ref (EV_P)
… …
904static int loop_done; 1731static int loop_done;
905 1732
906void 1733void
907ev_loop (EV_P_ int flags) 1734ev_loop (EV_P_ int flags)
908{ 1735{
909 double block; 1736 loop_done = EVUNLOOP_CANCEL;
910 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1737
1738 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
911 1739
912 do 1740 do
913 { 1741 {
1742#ifndef _WIN32
1743 if (expect_false (curpid)) /* penalise the forking check even more */
1744 if (expect_false (getpid () != curpid))
1745 {
1746 curpid = getpid ();
1747 postfork = 1;
1748 }
1749#endif
1750
1751#if EV_FORK_ENABLE
1752 /* we might have forked, so queue fork handlers */
1753 if (expect_false (postfork))
1754 if (forkcnt)
1755 {
1756 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1757 call_pending (EV_A);
1758 }
1759#endif
1760
914 /* queue check watchers (and execute them) */ 1761 /* queue prepare watchers (and execute them) */
915 if (expect_false (preparecnt)) 1762 if (expect_false (preparecnt))
916 { 1763 {
917 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1764 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
918 call_pending (EV_A); 1765 call_pending (EV_A);
919 } 1766 }
920 1767
1768 if (expect_false (!activecnt))
1769 break;
1770
1771 /* we might have forked, so reify kernel state if necessary */
1772 if (expect_false (postfork))
1773 loop_fork (EV_A);
1774
921 /* update fd-related kernel structures */ 1775 /* update fd-related kernel structures */
922 fd_reify (EV_A); 1776 fd_reify (EV_A);
923 1777
924 /* calculate blocking time */ 1778 /* calculate blocking time */
1779 {
1780 ev_tstamp waittime = 0.;
1781 ev_tstamp sleeptime = 0.;
925 1782
926 /* we only need this for !monotonic clockor timers, but as we basically 1783 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
927 always have timers, we just calculate it always */
928#if EV_USE_MONOTONIC
929 if (expect_true (have_monotonic))
930 time_update_monotonic (EV_A);
931 else
932#endif
933 { 1784 {
934 rt_now = ev_time (); 1785 /* update time to cancel out callback processing overhead */
935 mn_now = rt_now; 1786 time_update (EV_A_ 1e100);
936 }
937 1787
938 if (flags & EVLOOP_NONBLOCK || idlecnt)
939 block = 0.;
940 else
941 {
942 block = MAX_BLOCKTIME; 1788 waittime = MAX_BLOCKTIME;
943 1789
944 if (timercnt) 1790 if (timercnt)
945 { 1791 {
946 ev_tstamp to = timers [0]->at - mn_now + method_fudge; 1792 ev_tstamp to = ev_at (timers [HEAP0]) - mn_now + backend_fudge;
947 if (block > to) block = to; 1793 if (waittime > to) waittime = to;
948 } 1794 }
949 1795
1796#if EV_PERIODIC_ENABLE
950 if (periodiccnt) 1797 if (periodiccnt)
951 { 1798 {
952 ev_tstamp to = periodics [0]->at - rt_now + method_fudge; 1799 ev_tstamp to = ev_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
953 if (block > to) block = to; 1800 if (waittime > to) waittime = to;
954 } 1801 }
1802#endif
955 1803
956 if (block < 0.) block = 0.; 1804 if (expect_false (waittime < timeout_blocktime))
1805 waittime = timeout_blocktime;
1806
1807 sleeptime = waittime - backend_fudge;
1808
1809 if (expect_true (sleeptime > io_blocktime))
1810 sleeptime = io_blocktime;
1811
1812 if (sleeptime)
1813 {
1814 ev_sleep (sleeptime);
1815 waittime -= sleeptime;
1816 }
957 } 1817 }
958 1818
959 method_poll (EV_A_ block); 1819 ++loop_count;
1820 backend_poll (EV_A_ waittime);
960 1821
961 /* update rt_now, do magic */ 1822 /* update ev_rt_now, do magic */
962 time_update (EV_A); 1823 time_update (EV_A_ waittime + sleeptime);
1824 }
963 1825
964 /* queue pending timers and reschedule them */ 1826 /* queue pending timers and reschedule them */
965 timers_reify (EV_A); /* relative timers called last */ 1827 timers_reify (EV_A); /* relative timers called last */
1828#if EV_PERIODIC_ENABLE
966 periodics_reify (EV_A); /* absolute timers called first */ 1829 periodics_reify (EV_A); /* absolute timers called first */
1830#endif
967 1831
1832#if EV_IDLE_ENABLE
968 /* queue idle watchers unless io or timers are pending */ 1833 /* queue idle watchers unless other events are pending */
969 if (!pendingcnt) 1834 idle_reify (EV_A);
970 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 1835#endif
971 1836
972 /* queue check watchers, to be executed first */ 1837 /* queue check watchers, to be executed first */
973 if (checkcnt) 1838 if (expect_false (checkcnt))
974 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 1839 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
975 1840
976 call_pending (EV_A); 1841 call_pending (EV_A);
977 } 1842 }
978 while (activecnt && !loop_done); 1843 while (expect_true (
1844 activecnt
1845 && !loop_done
1846 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1847 ));
979 1848
980 if (loop_done != 2) 1849 if (loop_done == EVUNLOOP_ONE)
981 loop_done = 0; 1850 loop_done = EVUNLOOP_CANCEL;
982} 1851}
983 1852
984void 1853void
985ev_unloop (EV_P_ int how) 1854ev_unloop (EV_P_ int how)
986{ 1855{
987 loop_done = how; 1856 loop_done = how;
988} 1857}
989 1858
990/*****************************************************************************/ 1859/*****************************************************************************/
991 1860
992inline void 1861void inline_size
993wlist_add (WL *head, WL elem) 1862wlist_add (WL *head, WL elem)
994{ 1863{
995 elem->next = *head; 1864 elem->next = *head;
996 *head = elem; 1865 *head = elem;
997} 1866}
998 1867
999inline void 1868void inline_size
1000wlist_del (WL *head, WL elem) 1869wlist_del (WL *head, WL elem)
1001{ 1870{
1002 while (*head) 1871 while (*head)
1003 { 1872 {
1004 if (*head == elem) 1873 if (*head == elem)
… …
1009 1878
1010 head = &(*head)->next; 1879 head = &(*head)->next;
1011 } 1880 }
1012} 1881}
1013 1882
1014inline void 1883void inline_speed
1015ev_clear_pending (EV_P_ W w) 1884clear_pending (EV_P_ W w)
1016{ 1885{
1017 if (w->pending) 1886 if (w->pending)
1018 { 1887 {
1019 pendings [ABSPRI (w)][w->pending - 1].w = 0; 1888 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1020 w->pending = 0; 1889 w->pending = 0;
1021 } 1890 }
1022} 1891}
1023 1892
1024inline void 1893int
1894ev_clear_pending (EV_P_ void *w)
1895{
1896 W w_ = (W)w;
1897 int pending = w_->pending;
1898
1899 if (expect_true (pending))
1900 {
1901 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1902 w_->pending = 0;
1903 p->w = 0;
1904 return p->events;
1905 }
1906 else
1907 return 0;
1908}
1909
1910void inline_size
1911pri_adjust (EV_P_ W w)
1912{
1913 int pri = w->priority;
1914 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1915 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1916 w->priority = pri;
1917}
1918
1919void inline_speed
1025ev_start (EV_P_ W w, int active) 1920ev_start (EV_P_ W w, int active)
1026{ 1921{
1027 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 1922 pri_adjust (EV_A_ w);
1028 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1029
1030 w->active = active; 1923 w->active = active;
1031 ev_ref (EV_A); 1924 ev_ref (EV_A);
1032} 1925}
1033 1926
1034inline void 1927void inline_size
1035ev_stop (EV_P_ W w) 1928ev_stop (EV_P_ W w)
1036{ 1929{
1037 ev_unref (EV_A); 1930 ev_unref (EV_A);
1038 w->active = 0; 1931 w->active = 0;
1039} 1932}
1040 1933
1041/*****************************************************************************/ 1934/*****************************************************************************/
1042 1935
1043void 1936void noinline
1044ev_io_start (EV_P_ struct ev_io *w) 1937ev_io_start (EV_P_ ev_io *w)
1045{ 1938{
1046 int fd = w->fd; 1939 int fd = w->fd;
1047 1940
1048 if (ev_is_active (w)) 1941 if (expect_false (ev_is_active (w)))
1049 return; 1942 return;
1050 1943
1051 assert (("ev_io_start called with negative fd", fd >= 0)); 1944 assert (("ev_io_start called with negative fd", fd >= 0));
1052 1945
1053 ev_start (EV_A_ (W)w, 1); 1946 ev_start (EV_A_ (W)w, 1);
1054 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1947 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1055 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1948 wlist_add (&anfds[fd].head, (WL)w);
1056 1949
1057 fd_change (EV_A_ fd); 1950 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1951 w->events &= ~EV_IOFDSET;
1058} 1952}
1059 1953
1060void 1954void noinline
1061ev_io_stop (EV_P_ struct ev_io *w) 1955ev_io_stop (EV_P_ ev_io *w)
1062{ 1956{
1063 ev_clear_pending (EV_A_ (W)w); 1957 clear_pending (EV_A_ (W)w);
1064 if (!ev_is_active (w)) 1958 if (expect_false (!ev_is_active (w)))
1065 return; 1959 return;
1066 1960
1961 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1962
1067 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1963 wlist_del (&anfds[w->fd].head, (WL)w);
1068 ev_stop (EV_A_ (W)w); 1964 ev_stop (EV_A_ (W)w);
1069 1965
1070 fd_change (EV_A_ w->fd); 1966 fd_change (EV_A_ w->fd, 1);
1071} 1967}
1072 1968
1073void 1969void noinline
1074ev_timer_start (EV_P_ struct ev_timer *w) 1970ev_timer_start (EV_P_ ev_timer *w)
1075{ 1971{
1076 if (ev_is_active (w)) 1972 if (expect_false (ev_is_active (w)))
1077 return; 1973 return;
1078 1974
1079 w->at += mn_now; 1975 ev_at (w) += mn_now;
1080 1976
1081 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 1977 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1082 1978
1083 ev_start (EV_A_ (W)w, ++timercnt); 1979 ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
1084 array_needsize (timers, timermax, timercnt, ); 1980 array_needsize (WT, timers, timermax, timercnt + HEAP0, EMPTY2);
1085 timers [timercnt - 1] = w; 1981 timers [ev_active (w)] = (WT)w;
1086 upheap ((WT *)timers, timercnt - 1); 1982 upheap (timers, ev_active (w));
1087}
1088 1983
1089void 1984 /*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
1985}
1986
1987void noinline
1090ev_timer_stop (EV_P_ struct ev_timer *w) 1988ev_timer_stop (EV_P_ ev_timer *w)
1091{ 1989{
1092 ev_clear_pending (EV_A_ (W)w); 1990 clear_pending (EV_A_ (W)w);
1093 if (!ev_is_active (w)) 1991 if (expect_false (!ev_is_active (w)))
1094 return; 1992 return;
1095 1993
1096 if (w->active < timercnt--) 1994 {
1995 int active = ev_active (w);
1996
1997 assert (("internal timer heap corruption", timers [active] == (WT)w));
1998
1999 if (expect_true (active < timercnt + HEAP0 - 1))
1097 { 2000 {
1098 timers [w->active - 1] = timers [timercnt]; 2001 timers [active] = timers [timercnt + HEAP0 - 1];
1099 downheap ((WT *)timers, timercnt, w->active - 1); 2002 adjustheap (timers, timercnt, active);
1100 } 2003 }
1101 2004
1102 w->at = w->repeat; 2005 --timercnt;
2006 }
2007
2008 ev_at (w) -= mn_now;
1103 2009
1104 ev_stop (EV_A_ (W)w); 2010 ev_stop (EV_A_ (W)w);
1105} 2011}
1106 2012
1107void 2013void noinline
1108ev_timer_again (EV_P_ struct ev_timer *w) 2014ev_timer_again (EV_P_ ev_timer *w)
1109{ 2015{
1110 if (ev_is_active (w)) 2016 if (ev_is_active (w))
1111 { 2017 {
1112 if (w->repeat) 2018 if (w->repeat)
1113 { 2019 {
1114 w->at = mn_now + w->repeat; 2020 ev_at (w) = mn_now + w->repeat;
1115 downheap ((WT *)timers, timercnt, w->active - 1); 2021 adjustheap (timers, timercnt, ev_active (w));
1116 } 2022 }
1117 else 2023 else
1118 ev_timer_stop (EV_A_ w); 2024 ev_timer_stop (EV_A_ w);
1119 } 2025 }
1120 else if (w->repeat) 2026 else if (w->repeat)
2027 {
2028 ev_at (w) = w->repeat;
1121 ev_timer_start (EV_A_ w); 2029 ev_timer_start (EV_A_ w);
2030 }
1122} 2031}
1123 2032
1124void 2033#if EV_PERIODIC_ENABLE
2034void noinline
1125ev_periodic_start (EV_P_ struct ev_periodic *w) 2035ev_periodic_start (EV_P_ ev_periodic *w)
1126{ 2036{
1127 if (ev_is_active (w)) 2037 if (expect_false (ev_is_active (w)))
1128 return; 2038 return;
1129 2039
2040 if (w->reschedule_cb)
2041 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2042 else if (w->interval)
2043 {
1130 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2044 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1131
1132 /* this formula differs from the one in periodic_reify because we do not always round up */ 2045 /* this formula differs from the one in periodic_reify because we do not always round up */
1133 if (w->interval)
1134 w->at += ceil ((rt_now - w->at) / w->interval) * w->interval; 2046 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2047 }
2048 else
2049 ev_at (w) = w->offset;
1135 2050
1136 ev_start (EV_A_ (W)w, ++periodiccnt); 2051 ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1137 array_needsize (periodics, periodicmax, periodiccnt, ); 2052 array_needsize (WT, periodics, periodicmax, periodiccnt + HEAP0, EMPTY2);
1138 periodics [periodiccnt - 1] = w; 2053 periodics [ev_active (w)] = (WT)w;
1139 upheap ((WT *)periodics, periodiccnt - 1); 2054 upheap (periodics, ev_active (w));
1140}
1141 2055
1142void 2056 /*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
2057}
2058
2059void noinline
1143ev_periodic_stop (EV_P_ struct ev_periodic *w) 2060ev_periodic_stop (EV_P_ ev_periodic *w)
1144{ 2061{
1145 ev_clear_pending (EV_A_ (W)w); 2062 clear_pending (EV_A_ (W)w);
1146 if (!ev_is_active (w)) 2063 if (expect_false (!ev_is_active (w)))
1147 return; 2064 return;
1148 2065
1149 if (w->active < periodiccnt--) 2066 {
2067 int active = ev_active (w);
2068
2069 assert (("internal periodic heap corruption", periodics [active] == (WT)w));
2070
2071 if (expect_true (active < periodiccnt + HEAP0 - 1))
1150 { 2072 {
1151 periodics [w->active - 1] = periodics [periodiccnt]; 2073 periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1152 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2074 adjustheap (periodics, periodiccnt, active);
1153 } 2075 }
2076
2077 --periodiccnt;
2078 }
1154 2079
1155 ev_stop (EV_A_ (W)w); 2080 ev_stop (EV_A_ (W)w);
1156} 2081}
1157 2082
1158void 2083void noinline
1159ev_idle_start (EV_P_ struct ev_idle *w) 2084ev_periodic_again (EV_P_ ev_periodic *w)
1160{ 2085{
1161 if (ev_is_active (w)) 2086 /* TODO: use adjustheap and recalculation */
1162 return;
1163
1164 ev_start (EV_A_ (W)w, ++idlecnt);
1165 array_needsize (idles, idlemax, idlecnt, );
1166 idles [idlecnt - 1] = w;
1167}
1168
1169void
1170ev_idle_stop (EV_P_ struct ev_idle *w)
1171{
1172 ev_clear_pending (EV_A_ (W)w);
1173 if (ev_is_active (w))
1174 return;
1175
1176 idles [w->active - 1] = idles [--idlecnt];
1177 ev_stop (EV_A_ (W)w); 2087 ev_periodic_stop (EV_A_ w);
2088 ev_periodic_start (EV_A_ w);
1178} 2089}
1179 2090#endif
1180void
1181ev_prepare_start (EV_P_ struct ev_prepare *w)
1182{
1183 if (ev_is_active (w))
1184 return;
1185
1186 ev_start (EV_A_ (W)w, ++preparecnt);
1187 array_needsize (prepares, preparemax, preparecnt, );
1188 prepares [preparecnt - 1] = w;
1189}
1190
1191void
1192ev_prepare_stop (EV_P_ struct ev_prepare *w)
1193{
1194 ev_clear_pending (EV_A_ (W)w);
1195 if (ev_is_active (w))
1196 return;
1197
1198 prepares [w->active - 1] = prepares [--preparecnt];
1199 ev_stop (EV_A_ (W)w);
1200}
1201
1202void
1203ev_check_start (EV_P_ struct ev_check *w)
1204{
1205 if (ev_is_active (w))
1206 return;
1207
1208 ev_start (EV_A_ (W)w, ++checkcnt);
1209 array_needsize (checks, checkmax, checkcnt, );
1210 checks [checkcnt - 1] = w;
1211}
1212
1213void
1214ev_check_stop (EV_P_ struct ev_check *w)
1215{
1216 ev_clear_pending (EV_A_ (W)w);
1217 if (ev_is_active (w))
1218 return;
1219
1220 checks [w->active - 1] = checks [--checkcnt];
1221 ev_stop (EV_A_ (W)w);
1222}
1223 2091
1224#ifndef SA_RESTART 2092#ifndef SA_RESTART
1225# define SA_RESTART 0 2093# define SA_RESTART 0
1226#endif 2094#endif
1227 2095
1228void 2096void noinline
1229ev_signal_start (EV_P_ struct ev_signal *w) 2097ev_signal_start (EV_P_ ev_signal *w)
1230{ 2098{
1231#if EV_MULTIPLICITY 2099#if EV_MULTIPLICITY
1232 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2100 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1233#endif 2101#endif
1234 if (ev_is_active (w)) 2102 if (expect_false (ev_is_active (w)))
1235 return; 2103 return;
1236 2104
1237 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2105 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1238 2106
2107 evpipe_init (EV_A);
2108
2109 {
2110#ifndef _WIN32
2111 sigset_t full, prev;
2112 sigfillset (&full);
2113 sigprocmask (SIG_SETMASK, &full, &prev);
2114#endif
2115
2116 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2117
2118#ifndef _WIN32
2119 sigprocmask (SIG_SETMASK, &prev, 0);
2120#endif
2121 }
2122
1239 ev_start (EV_A_ (W)w, 1); 2123 ev_start (EV_A_ (W)w, 1);
1240 array_needsize (signals, signalmax, w->signum, signals_init);
1241 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2124 wlist_add (&signals [w->signum - 1].head, (WL)w);
1242 2125
1243 if (!w->next) 2126 if (!((WL)w)->next)
1244 { 2127 {
2128#if _WIN32
2129 signal (w->signum, ev_sighandler);
2130#else
1245 struct sigaction sa; 2131 struct sigaction sa;
1246 sa.sa_handler = sighandler; 2132 sa.sa_handler = ev_sighandler;
1247 sigfillset (&sa.sa_mask); 2133 sigfillset (&sa.sa_mask);
1248 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2134 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1249 sigaction (w->signum, &sa, 0); 2135 sigaction (w->signum, &sa, 0);
2136#endif
1250 } 2137 }
1251} 2138}
1252 2139
1253void 2140void noinline
1254ev_signal_stop (EV_P_ struct ev_signal *w) 2141ev_signal_stop (EV_P_ ev_signal *w)
1255{ 2142{
1256 ev_clear_pending (EV_A_ (W)w); 2143 clear_pending (EV_A_ (W)w);
1257 if (!ev_is_active (w)) 2144 if (expect_false (!ev_is_active (w)))
1258 return; 2145 return;
1259 2146
1260 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2147 wlist_del (&signals [w->signum - 1].head, (WL)w);
1261 ev_stop (EV_A_ (W)w); 2148 ev_stop (EV_A_ (W)w);
1262 2149
1263 if (!signals [w->signum - 1].head) 2150 if (!signals [w->signum - 1].head)
1264 signal (w->signum, SIG_DFL); 2151 signal (w->signum, SIG_DFL);
1265} 2152}
1266 2153
1267void 2154void
1268ev_child_start (EV_P_ struct ev_child *w) 2155ev_child_start (EV_P_ ev_child *w)
1269{ 2156{
1270#if EV_MULTIPLICITY 2157#if EV_MULTIPLICITY
1271 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2158 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1272#endif 2159#endif
1273 if (ev_is_active (w)) 2160 if (expect_false (ev_is_active (w)))
1274 return; 2161 return;
1275 2162
1276 ev_start (EV_A_ (W)w, 1); 2163 ev_start (EV_A_ (W)w, 1);
1277 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2164 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1278} 2165}
1279 2166
1280void 2167void
1281ev_child_stop (EV_P_ struct ev_child *w) 2168ev_child_stop (EV_P_ ev_child *w)
1282{ 2169{
1283 ev_clear_pending (EV_A_ (W)w); 2170 clear_pending (EV_A_ (W)w);
1284 if (ev_is_active (w)) 2171 if (expect_false (!ev_is_active (w)))
1285 return; 2172 return;
1286 2173
1287 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2174 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1288 ev_stop (EV_A_ (W)w); 2175 ev_stop (EV_A_ (W)w);
1289} 2176}
1290 2177
2178#if EV_STAT_ENABLE
2179
2180# ifdef _WIN32
2181# undef lstat
2182# define lstat(a,b) _stati64 (a,b)
2183# endif
2184
2185#define DEF_STAT_INTERVAL 5.0074891
2186#define MIN_STAT_INTERVAL 0.1074891
2187
2188static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2189
2190#if EV_USE_INOTIFY
2191# define EV_INOTIFY_BUFSIZE 8192
2192
2193static void noinline
2194infy_add (EV_P_ ev_stat *w)
2195{
2196 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);
2197
2198 if (w->wd < 0)
2199 {
2200 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2201
2202 /* monitor some parent directory for speedup hints */
2203 /* note that exceeding the hardcoded limit is not a correctness issue, */
2204 /* but an efficiency issue only */
2205 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2206 {
2207 char path [4096];
2208 strcpy (path, w->path);
2209
2210 do
2211 {
2212 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2213 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2214
2215 char *pend = strrchr (path, '/');
2216
2217 if (!pend)
2218 break; /* whoops, no '/', complain to your admin */
2219
2220 *pend = 0;
2221 w->wd = inotify_add_watch (fs_fd, path, mask);
2222 }
2223 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2224 }
2225 }
2226 else
2227 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2228
2229 if (w->wd >= 0)
2230 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2231}
2232
2233static void noinline
2234infy_del (EV_P_ ev_stat *w)
2235{
2236 int slot;
2237 int wd = w->wd;
2238
2239 if (wd < 0)
2240 return;
2241
2242 w->wd = -2;
2243 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2244 wlist_del (&fs_hash [slot].head, (WL)w);
2245
2246 /* remove this watcher, if others are watching it, they will rearm */
2247 inotify_rm_watch (fs_fd, wd);
2248}
2249
2250static void noinline
2251infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2252{
2253 if (slot < 0)
2254 /* overflow, need to check for all hahs slots */
2255 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2256 infy_wd (EV_A_ slot, wd, ev);
2257 else
2258 {
2259 WL w_;
2260
2261 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2262 {
2263 ev_stat *w = (ev_stat *)w_;
2264 w_ = w_->next; /* lets us remove this watcher and all before it */
2265
2266 if (w->wd == wd || wd == -1)
2267 {
2268 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2269 {
2270 w->wd = -1;
2271 infy_add (EV_A_ w); /* re-add, no matter what */
2272 }
2273
2274 stat_timer_cb (EV_A_ &w->timer, 0);
2275 }
2276 }
2277 }
2278}
2279
2280static void
2281infy_cb (EV_P_ ev_io *w, int revents)
2282{
2283 char buf [EV_INOTIFY_BUFSIZE];
2284 struct inotify_event *ev = (struct inotify_event *)buf;
2285 int ofs;
2286 int len = read (fs_fd, buf, sizeof (buf));
2287
2288 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2289 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2290}
2291
2292void inline_size
2293infy_init (EV_P)
2294{
2295 if (fs_fd != -2)
2296 return;
2297
2298 fs_fd = inotify_init ();
2299
2300 if (fs_fd >= 0)
2301 {
2302 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2303 ev_set_priority (&fs_w, EV_MAXPRI);
2304 ev_io_start (EV_A_ &fs_w);
2305 }
2306}
2307
2308void inline_size
2309infy_fork (EV_P)
2310{
2311 int slot;
2312
2313 if (fs_fd < 0)
2314 return;
2315
2316 close (fs_fd);
2317 fs_fd = inotify_init ();
2318
2319 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2320 {
2321 WL w_ = fs_hash [slot].head;
2322 fs_hash [slot].head = 0;
2323
2324 while (w_)
2325 {
2326 ev_stat *w = (ev_stat *)w_;
2327 w_ = w_->next; /* lets us add this watcher */
2328
2329 w->wd = -1;
2330
2331 if (fs_fd >= 0)
2332 infy_add (EV_A_ w); /* re-add, no matter what */
2333 else
2334 ev_timer_start (EV_A_ &w->timer);
2335 }
2336
2337 }
2338}
2339
2340#endif
2341
2342void
2343ev_stat_stat (EV_P_ ev_stat *w)
2344{
2345 if (lstat (w->path, &w->attr) < 0)
2346 w->attr.st_nlink = 0;
2347 else if (!w->attr.st_nlink)
2348 w->attr.st_nlink = 1;
2349}
2350
2351static void noinline
2352stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2353{
2354 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2355
2356 /* we copy this here each the time so that */
2357 /* prev has the old value when the callback gets invoked */
2358 w->prev = w->attr;
2359 ev_stat_stat (EV_A_ w);
2360
2361 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2362 if (
2363 w->prev.st_dev != w->attr.st_dev
2364 || w->prev.st_ino != w->attr.st_ino
2365 || w->prev.st_mode != w->attr.st_mode
2366 || w->prev.st_nlink != w->attr.st_nlink
2367 || w->prev.st_uid != w->attr.st_uid
2368 || w->prev.st_gid != w->attr.st_gid
2369 || w->prev.st_rdev != w->attr.st_rdev
2370 || w->prev.st_size != w->attr.st_size
2371 || w->prev.st_atime != w->attr.st_atime
2372 || w->prev.st_mtime != w->attr.st_mtime
2373 || w->prev.st_ctime != w->attr.st_ctime
2374 ) {
2375 #if EV_USE_INOTIFY
2376 infy_del (EV_A_ w);
2377 infy_add (EV_A_ w);
2378 ev_stat_stat (EV_A_ w); /* avoid race... */
2379 #endif
2380
2381 ev_feed_event (EV_A_ w, EV_STAT);
2382 }
2383}
2384
2385void
2386ev_stat_start (EV_P_ ev_stat *w)
2387{
2388 if (expect_false (ev_is_active (w)))
2389 return;
2390
2391 /* since we use memcmp, we need to clear any padding data etc. */
2392 memset (&w->prev, 0, sizeof (ev_statdata));
2393 memset (&w->attr, 0, sizeof (ev_statdata));
2394
2395 ev_stat_stat (EV_A_ w);
2396
2397 if (w->interval < MIN_STAT_INTERVAL)
2398 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2399
2400 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2401 ev_set_priority (&w->timer, ev_priority (w));
2402
2403#if EV_USE_INOTIFY
2404 infy_init (EV_A);
2405
2406 if (fs_fd >= 0)
2407 infy_add (EV_A_ w);
2408 else
2409#endif
2410 ev_timer_start (EV_A_ &w->timer);
2411
2412 ev_start (EV_A_ (W)w, 1);
2413}
2414
2415void
2416ev_stat_stop (EV_P_ ev_stat *w)
2417{
2418 clear_pending (EV_A_ (W)w);
2419 if (expect_false (!ev_is_active (w)))
2420 return;
2421
2422#if EV_USE_INOTIFY
2423 infy_del (EV_A_ w);
2424#endif
2425 ev_timer_stop (EV_A_ &w->timer);
2426
2427 ev_stop (EV_A_ (W)w);
2428}
2429#endif
2430
2431#if EV_IDLE_ENABLE
2432void
2433ev_idle_start (EV_P_ ev_idle *w)
2434{
2435 if (expect_false (ev_is_active (w)))
2436 return;
2437
2438 pri_adjust (EV_A_ (W)w);
2439
2440 {
2441 int active = ++idlecnt [ABSPRI (w)];
2442
2443 ++idleall;
2444 ev_start (EV_A_ (W)w, active);
2445
2446 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2447 idles [ABSPRI (w)][active - 1] = w;
2448 }
2449}
2450
2451void
2452ev_idle_stop (EV_P_ ev_idle *w)
2453{
2454 clear_pending (EV_A_ (W)w);
2455 if (expect_false (!ev_is_active (w)))
2456 return;
2457
2458 {
2459 int active = ev_active (w);
2460
2461 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2462 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2463
2464 ev_stop (EV_A_ (W)w);
2465 --idleall;
2466 }
2467}
2468#endif
2469
2470void
2471ev_prepare_start (EV_P_ ev_prepare *w)
2472{
2473 if (expect_false (ev_is_active (w)))
2474 return;
2475
2476 ev_start (EV_A_ (W)w, ++preparecnt);
2477 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2478 prepares [preparecnt - 1] = w;
2479}
2480
2481void
2482ev_prepare_stop (EV_P_ ev_prepare *w)
2483{
2484 clear_pending (EV_A_ (W)w);
2485 if (expect_false (!ev_is_active (w)))
2486 return;
2487
2488 {
2489 int active = ev_active (w);
2490
2491 prepares [active - 1] = prepares [--preparecnt];
2492 ev_active (prepares [active - 1]) = active;
2493 }
2494
2495 ev_stop (EV_A_ (W)w);
2496}
2497
2498void
2499ev_check_start (EV_P_ ev_check *w)
2500{
2501 if (expect_false (ev_is_active (w)))
2502 return;
2503
2504 ev_start (EV_A_ (W)w, ++checkcnt);
2505 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2506 checks [checkcnt - 1] = w;
2507}
2508
2509void
2510ev_check_stop (EV_P_ ev_check *w)
2511{
2512 clear_pending (EV_A_ (W)w);
2513 if (expect_false (!ev_is_active (w)))
2514 return;
2515
2516 {
2517 int active = ev_active (w);
2518
2519 checks [active - 1] = checks [--checkcnt];
2520 ev_active (checks [active - 1]) = active;
2521 }
2522
2523 ev_stop (EV_A_ (W)w);
2524}
2525
2526#if EV_EMBED_ENABLE
2527void noinline
2528ev_embed_sweep (EV_P_ ev_embed *w)
2529{
2530 ev_loop (w->other, EVLOOP_NONBLOCK);
2531}
2532
2533static void
2534embed_io_cb (EV_P_ ev_io *io, int revents)
2535{
2536 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2537
2538 if (ev_cb (w))
2539 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2540 else
2541 ev_loop (w->other, EVLOOP_NONBLOCK);
2542}
2543
2544static void
2545embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2546{
2547 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2548
2549 {
2550 struct ev_loop *loop = w->other;
2551
2552 while (fdchangecnt)
2553 {
2554 fd_reify (EV_A);
2555 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2556 }
2557 }
2558}
2559
2560#if 0
2561static void
2562embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2563{
2564 ev_idle_stop (EV_A_ idle);
2565}
2566#endif
2567
2568void
2569ev_embed_start (EV_P_ ev_embed *w)
2570{
2571 if (expect_false (ev_is_active (w)))
2572 return;
2573
2574 {
2575 struct ev_loop *loop = w->other;
2576 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2577 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2578 }
2579
2580 ev_set_priority (&w->io, ev_priority (w));
2581 ev_io_start (EV_A_ &w->io);
2582
2583 ev_prepare_init (&w->prepare, embed_prepare_cb);
2584 ev_set_priority (&w->prepare, EV_MINPRI);
2585 ev_prepare_start (EV_A_ &w->prepare);
2586
2587 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2588
2589 ev_start (EV_A_ (W)w, 1);
2590}
2591
2592void
2593ev_embed_stop (EV_P_ ev_embed *w)
2594{
2595 clear_pending (EV_A_ (W)w);
2596 if (expect_false (!ev_is_active (w)))
2597 return;
2598
2599 ev_io_stop (EV_A_ &w->io);
2600 ev_prepare_stop (EV_A_ &w->prepare);
2601
2602 ev_stop (EV_A_ (W)w);
2603}
2604#endif
2605
2606#if EV_FORK_ENABLE
2607void
2608ev_fork_start (EV_P_ ev_fork *w)
2609{
2610 if (expect_false (ev_is_active (w)))
2611 return;
2612
2613 ev_start (EV_A_ (W)w, ++forkcnt);
2614 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2615 forks [forkcnt - 1] = w;
2616}
2617
2618void
2619ev_fork_stop (EV_P_ ev_fork *w)
2620{
2621 clear_pending (EV_A_ (W)w);
2622 if (expect_false (!ev_is_active (w)))
2623 return;
2624
2625 {
2626 int active = ev_active (w);
2627
2628 forks [active - 1] = forks [--forkcnt];
2629 ev_active (forks [active - 1]) = active;
2630 }
2631
2632 ev_stop (EV_A_ (W)w);
2633}
2634#endif
2635
2636#if EV_ASYNC_ENABLE
2637void
2638ev_async_start (EV_P_ ev_async *w)
2639{
2640 if (expect_false (ev_is_active (w)))
2641 return;
2642
2643 evpipe_init (EV_A);
2644
2645 ev_start (EV_A_ (W)w, ++asynccnt);
2646 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2647 asyncs [asynccnt - 1] = w;
2648}
2649
2650void
2651ev_async_stop (EV_P_ ev_async *w)
2652{
2653 clear_pending (EV_A_ (W)w);
2654 if (expect_false (!ev_is_active (w)))
2655 return;
2656
2657 {
2658 int active = ev_active (w);
2659
2660 asyncs [active - 1] = asyncs [--asynccnt];
2661 ev_active (asyncs [active - 1]) = active;
2662 }
2663
2664 ev_stop (EV_A_ (W)w);
2665}
2666
2667void
2668ev_async_send (EV_P_ ev_async *w)
2669{
2670 w->sent = 1;
2671 evpipe_write (EV_A_ &gotasync);
2672}
2673#endif
2674
1291/*****************************************************************************/ 2675/*****************************************************************************/
1292 2676
1293struct ev_once 2677struct ev_once
1294{ 2678{
1295 struct ev_io io; 2679 ev_io io;
1296 struct ev_timer to; 2680 ev_timer to;
1297 void (*cb)(int revents, void *arg); 2681 void (*cb)(int revents, void *arg);
1298 void *arg; 2682 void *arg;
1299}; 2683};
1300 2684
1301static void 2685static void
… …
1304 void (*cb)(int revents, void *arg) = once->cb; 2688 void (*cb)(int revents, void *arg) = once->cb;
1305 void *arg = once->arg; 2689 void *arg = once->arg;
1306 2690
1307 ev_io_stop (EV_A_ &once->io); 2691 ev_io_stop (EV_A_ &once->io);
1308 ev_timer_stop (EV_A_ &once->to); 2692 ev_timer_stop (EV_A_ &once->to);
1309 free (once); 2693 ev_free (once);
1310 2694
1311 cb (revents, arg); 2695 cb (revents, arg);
1312} 2696}
1313 2697
1314static void 2698static void
1315once_cb_io (EV_P_ struct ev_io *w, int revents) 2699once_cb_io (EV_P_ ev_io *w, int revents)
1316{ 2700{
1317 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2701 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1318} 2702}
1319 2703
1320static void 2704static void
1321once_cb_to (EV_P_ struct ev_timer *w, int revents) 2705once_cb_to (EV_P_ ev_timer *w, int revents)
1322{ 2706{
1323 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2707 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1324} 2708}
1325 2709
1326void 2710void
1327ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2711ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1328{ 2712{
1329 struct ev_once *once = malloc (sizeof (struct ev_once)); 2713 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1330 2714
1331 if (!once) 2715 if (expect_false (!once))
2716 {
1332 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 2717 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1333 else 2718 return;
1334 { 2719 }
2720
1335 once->cb = cb; 2721 once->cb = cb;
1336 once->arg = arg; 2722 once->arg = arg;
1337 2723
1338 ev_watcher_init (&once->io, once_cb_io); 2724 ev_init (&once->io, once_cb_io);
1339 if (fd >= 0) 2725 if (fd >= 0)
1340 { 2726 {
1341 ev_io_set (&once->io, fd, events); 2727 ev_io_set (&once->io, fd, events);
1342 ev_io_start (EV_A_ &once->io); 2728 ev_io_start (EV_A_ &once->io);
1343 } 2729 }
1344 2730
1345 ev_watcher_init (&once->to, once_cb_to); 2731 ev_init (&once->to, once_cb_to);
1346 if (timeout >= 0.) 2732 if (timeout >= 0.)
1347 { 2733 {
1348 ev_timer_set (&once->to, timeout, 0.); 2734 ev_timer_set (&once->to, timeout, 0.);
1349 ev_timer_start (EV_A_ &once->to); 2735 ev_timer_start (EV_A_ &once->to);
1350 }
1351 } 2736 }
1352} 2737}
1353 2738
2739#if EV_MULTIPLICITY
2740 #include "ev_wrap.h"
2741#endif
2742
2743#ifdef __cplusplus
2744}
2745#endif
2746

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