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Comparing libev/ev.c (file contents):
Revision 1.57 by root, Sun Nov 4 16:43:53 2007 UTC vs.
Revision 1.233 by root, Tue May 6 23:34:16 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/* towards the root */
765void inline_speed
361upheap (WT *heap, int k) 766upheap (WT *heap, int k)
362{ 767{
363 WT w = heap [k]; 768 WT w = heap [k];
364 769
365 while (k && heap [k >> 1]->at > w->at) 770 for (;;)
366 { 771 {
772 int p = k >> 1;
773
774 /* maybe we could use a dummy element at heap [0]? */
775 if (!p || heap [p]->at <= w->at)
776 break;
777
367 heap [k] = heap [k >> 1]; 778 heap [k] = heap [p];
368 heap [k]->active = k + 1; 779 ev_active (heap [k]) = k;
369 k >>= 1; 780 k = p;
370 } 781 }
371 782
372 heap [k] = w; 783 heap [k] = w;
373 heap [k]->active = k + 1; 784 ev_active (heap [k]) = k;
374
375} 785}
376 786
377static void 787/* away from the root */
788void inline_speed
378downheap (WT *heap, int N, int k) 789downheap (WT *heap, int N, int k)
379{ 790{
380 WT w = heap [k]; 791 WT w = heap [k];
381 792
382 while (k < (N >> 1)) 793 for (;;)
383 { 794 {
384 int j = k << 1; 795 int c = k << 1;
385 796
386 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 797 if (c > N)
387 ++j;
388
389 if (w->at <= heap [j]->at)
390 break; 798 break;
391 799
800 c += c < N && heap [c]->at > heap [c + 1]->at
801 ? 1 : 0;
802
803 if (w->at <= heap [c]->at)
804 break;
805
392 heap [k] = heap [j]; 806 heap [k] = heap [c];
393 heap [k]->active = k + 1; 807 ev_active (heap [k]) = k;
808
394 k = j; 809 k = c;
395 } 810 }
396 811
397 heap [k] = w; 812 heap [k] = w;
398 heap [k]->active = k + 1; 813 ev_active (heap [k]) = k;
814}
815
816void inline_size
817adjustheap (WT *heap, int N, int k)
818{
819 upheap (heap, k);
820 downheap (heap, N, k);
399} 821}
400 822
401/*****************************************************************************/ 823/*****************************************************************************/
402 824
403typedef struct 825typedef struct
404{ 826{
405 struct ev_watcher_list *head; 827 WL head;
406 sig_atomic_t volatile gotsig; 828 EV_ATOMIC_T gotsig;
407} ANSIG; 829} ANSIG;
408 830
409static ANSIG *signals; 831static ANSIG *signals;
410static int signalmax; 832static int signalmax;
411 833
412static int sigpipe [2]; 834static EV_ATOMIC_T gotsig;
413static sig_atomic_t volatile gotsig;
414 835
415static void 836void inline_size
416signals_init (ANSIG *base, int count) 837signals_init (ANSIG *base, int count)
417{ 838{
418 while (count--) 839 while (count--)
419 { 840 {
420 base->head = 0; 841 base->head = 0;
… …
422 843
423 ++base; 844 ++base;
424 } 845 }
425} 846}
426 847
848/*****************************************************************************/
849
850void inline_speed
851fd_intern (int fd)
852{
853#ifdef _WIN32
854 int arg = 1;
855 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
856#else
857 fcntl (fd, F_SETFD, FD_CLOEXEC);
858 fcntl (fd, F_SETFL, O_NONBLOCK);
859#endif
860}
861
862static void noinline
863evpipe_init (EV_P)
864{
865 if (!ev_is_active (&pipeev))
866 {
867#if EV_USE_EVENTFD
868 if ((evfd = eventfd (0, 0)) >= 0)
869 {
870 evpipe [0] = -1;
871 fd_intern (evfd);
872 ev_io_set (&pipeev, evfd, EV_READ);
873 }
874 else
875#endif
876 {
877 while (pipe (evpipe))
878 syserr ("(libev) error creating signal/async pipe");
879
880 fd_intern (evpipe [0]);
881 fd_intern (evpipe [1]);
882 ev_io_set (&pipeev, evpipe [0], EV_READ);
883 }
884
885 ev_io_start (EV_A_ &pipeev);
886 ev_unref (EV_A); /* watcher should not keep loop alive */
887 }
888}
889
890void inline_size
891evpipe_write (EV_P_ EV_ATOMIC_T *flag)
892{
893 if (!*flag)
894 {
895 int old_errno = errno; /* save errno because write might clobber it */
896
897 *flag = 1;
898
899#if EV_USE_EVENTFD
900 if (evfd >= 0)
901 {
902 uint64_t counter = 1;
903 write (evfd, &counter, sizeof (uint64_t));
904 }
905 else
906#endif
907 write (evpipe [1], &old_errno, 1);
908
909 errno = old_errno;
910 }
911}
912
427static void 913static void
914pipecb (EV_P_ ev_io *iow, int revents)
915{
916#if EV_USE_EVENTFD
917 if (evfd >= 0)
918 {
919 uint64_t counter;
920 read (evfd, &counter, sizeof (uint64_t));
921 }
922 else
923#endif
924 {
925 char dummy;
926 read (evpipe [0], &dummy, 1);
927 }
928
929 if (gotsig && ev_is_default_loop (EV_A))
930 {
931 int signum;
932 gotsig = 0;
933
934 for (signum = signalmax; signum--; )
935 if (signals [signum].gotsig)
936 ev_feed_signal_event (EV_A_ signum + 1);
937 }
938
939#if EV_ASYNC_ENABLE
940 if (gotasync)
941 {
942 int i;
943 gotasync = 0;
944
945 for (i = asynccnt; i--; )
946 if (asyncs [i]->sent)
947 {
948 asyncs [i]->sent = 0;
949 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
950 }
951 }
952#endif
953}
954
955/*****************************************************************************/
956
957static void
428sighandler (int signum) 958ev_sighandler (int signum)
429{ 959{
960#if EV_MULTIPLICITY
961 struct ev_loop *loop = &default_loop_struct;
962#endif
963
964#if _WIN32
965 signal (signum, ev_sighandler);
966#endif
967
430 signals [signum - 1].gotsig = 1; 968 signals [signum - 1].gotsig = 1;
431 969 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} 970}
440 971
441static void 972void noinline
442sigcb (EV_P_ struct ev_io *iow, int revents) 973ev_feed_signal_event (EV_P_ int signum)
443{ 974{
444 struct ev_watcher_list *w; 975 WL w;
976
977#if EV_MULTIPLICITY
978 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
979#endif
980
445 int signum; 981 --signum;
446 982
447 read (sigpipe [0], &revents, 1); 983 if (signum < 0 || signum >= signalmax)
448 gotsig = 0; 984 return;
449 985
450 for (signum = signalmax; signum--; )
451 if (signals [signum].gotsig)
452 {
453 signals [signum].gotsig = 0; 986 signals [signum].gotsig = 0;
454 987
455 for (w = signals [signum].head; w; w = w->next) 988 for (w = signals [signum].head; w; w = w->next)
456 event (EV_A_ (W)w, EV_SIGNAL); 989 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} 990}
476 991
477/*****************************************************************************/ 992/*****************************************************************************/
478 993
994static WL childs [EV_PID_HASHSIZE];
995
479#ifndef WIN32 996#ifndef _WIN32
997
998static ev_signal childev;
999
1000#ifndef WIFCONTINUED
1001# define WIFCONTINUED(status) 0
1002#endif
1003
1004void inline_speed
1005child_reap (EV_P_ int chain, int pid, int status)
1006{
1007 ev_child *w;
1008 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1009
1010 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1011 {
1012 if ((w->pid == pid || !w->pid)
1013 && (!traced || (w->flags & 1)))
1014 {
1015 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1016 w->rpid = pid;
1017 w->rstatus = status;
1018 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1019 }
1020 }
1021}
480 1022
481#ifndef WCONTINUED 1023#ifndef WCONTINUED
482# define WCONTINUED 0 1024# define WCONTINUED 0
483#endif 1025#endif
484 1026
485static void 1027static 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) 1028childcb (EV_P_ ev_signal *sw, int revents)
502{ 1029{
503 int pid, status; 1030 int pid, status;
504 1031
1032 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
505 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1033 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
506 { 1034 if (!WCONTINUED
1035 || errno != EINVAL
1036 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1037 return;
1038
507 /* make sure we are called again until all childs have been reaped */ 1039 /* make sure we are called again until all children have been reaped */
1040 /* we need to do it this way so that the callback gets called before we continue */
508 event (EV_A_ (W)sw, EV_SIGNAL); 1041 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
509 1042
510 child_reap (EV_A_ sw, pid, pid, status); 1043 child_reap (EV_A_ pid, pid, status);
1044 if (EV_PID_HASHSIZE > 1)
511 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1045 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
512 }
513} 1046}
514 1047
515#endif 1048#endif
516 1049
517/*****************************************************************************/ 1050/*****************************************************************************/
518 1051
1052#if EV_USE_PORT
1053# include "ev_port.c"
1054#endif
519#if EV_USE_KQUEUE 1055#if EV_USE_KQUEUE
520# include "ev_kqueue.c" 1056# include "ev_kqueue.c"
521#endif 1057#endif
522#if EV_USE_EPOLL 1058#if EV_USE_EPOLL
523# include "ev_epoll.c" 1059# include "ev_epoll.c"
524#endif 1060#endif
525#if EV_USEV_POLL 1061#if EV_USE_POLL
526# include "ev_poll.c" 1062# include "ev_poll.c"
527#endif 1063#endif
528#if EV_USE_SELECT 1064#if EV_USE_SELECT
529# include "ev_select.c" 1065# include "ev_select.c"
530#endif 1066#endif
… …
540{ 1076{
541 return EV_VERSION_MINOR; 1077 return EV_VERSION_MINOR;
542} 1078}
543 1079
544/* return true if we are running with elevated privileges and should ignore env variables */ 1080/* return true if we are running with elevated privileges and should ignore env variables */
545static int 1081int inline_size
546enable_secure (void) 1082enable_secure (void)
547{ 1083{
548#ifdef WIN32 1084#ifdef _WIN32
549 return 0; 1085 return 0;
550#else 1086#else
551 return getuid () != geteuid () 1087 return getuid () != geteuid ()
552 || getgid () != getegid (); 1088 || getgid () != getegid ();
553#endif 1089#endif
554} 1090}
555 1091
556int 1092unsigned int
557ev_method (EV_P) 1093ev_supported_backends (void)
558{ 1094{
559 return method; 1095 unsigned int flags = 0;
560}
561 1096
562static void 1097 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
563loop_init (EV_P_ int methods) 1098 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1099 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1100 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1101 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1102
1103 return flags;
1104}
1105
1106unsigned int
1107ev_recommended_backends (void)
564{ 1108{
565 if (!method) 1109 unsigned int flags = ev_supported_backends ();
1110
1111#ifndef __NetBSD__
1112 /* kqueue is borked on everything but netbsd apparently */
1113 /* it usually doesn't work correctly on anything but sockets and pipes */
1114 flags &= ~EVBACKEND_KQUEUE;
1115#endif
1116#ifdef __APPLE__
1117 // flags &= ~EVBACKEND_KQUEUE; for documentation
1118 flags &= ~EVBACKEND_POLL;
1119#endif
1120
1121 return flags;
1122}
1123
1124unsigned int
1125ev_embeddable_backends (void)
1126{
1127 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1128
1129 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1130 /* please fix it and tell me how to detect the fix */
1131 flags &= ~EVBACKEND_EPOLL;
1132
1133 return flags;
1134}
1135
1136unsigned int
1137ev_backend (EV_P)
1138{
1139 return backend;
1140}
1141
1142unsigned int
1143ev_loop_count (EV_P)
1144{
1145 return loop_count;
1146}
1147
1148void
1149ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1150{
1151 io_blocktime = interval;
1152}
1153
1154void
1155ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1156{
1157 timeout_blocktime = interval;
1158}
1159
1160static void noinline
1161loop_init (EV_P_ unsigned int flags)
1162{
1163 if (!backend)
566 { 1164 {
567#if EV_USE_MONOTONIC 1165#if EV_USE_MONOTONIC
568 { 1166 {
569 struct timespec ts; 1167 struct timespec ts;
570 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1168 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
571 have_monotonic = 1; 1169 have_monotonic = 1;
572 } 1170 }
573#endif 1171#endif
574 1172
575 rt_now = ev_time (); 1173 ev_rt_now = ev_time ();
576 mn_now = get_clock (); 1174 mn_now = get_clock ();
577 now_floor = mn_now; 1175 now_floor = mn_now;
578 rtmn_diff = rt_now - mn_now; 1176 rtmn_diff = ev_rt_now - mn_now;
579 1177
580 if (methods == EVMETHOD_AUTO) 1178 io_blocktime = 0.;
581 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1179 timeout_blocktime = 0.;
1180 backend = 0;
1181 backend_fd = -1;
1182 gotasync = 0;
1183#if EV_USE_INOTIFY
1184 fs_fd = -2;
1185#endif
1186
1187 /* pid check not overridable via env */
1188#ifndef _WIN32
1189 if (flags & EVFLAG_FORKCHECK)
1190 curpid = getpid ();
1191#endif
1192
1193 if (!(flags & EVFLAG_NOENV)
1194 && !enable_secure ()
1195 && getenv ("LIBEV_FLAGS"))
582 methods = atoi (getenv ("LIBEV_METHODS")); 1196 flags = atoi (getenv ("LIBEV_FLAGS"));
583 else
584 methods = EVMETHOD_ANY;
585 1197
586 method = 0; 1198 if (!(flags & 0x0000ffffU))
1199 flags |= ev_recommended_backends ();
1200
1201#if EV_USE_PORT
1202 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1203#endif
587#if EV_USE_KQUEUE 1204#if EV_USE_KQUEUE
588 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 1205 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
589#endif 1206#endif
590#if EV_USE_EPOLL 1207#if EV_USE_EPOLL
591 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 1208 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
592#endif 1209#endif
593#if EV_USEV_POLL 1210#if EV_USE_POLL
594 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 1211 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
595#endif 1212#endif
596#if EV_USE_SELECT 1213#if EV_USE_SELECT
597 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 1214 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
598#endif 1215#endif
599 }
600}
601 1216
602void 1217 ev_init (&pipeev, pipecb);
1218 ev_set_priority (&pipeev, EV_MAXPRI);
1219 }
1220}
1221
1222static void noinline
603loop_destroy (EV_P) 1223loop_destroy (EV_P)
604{ 1224{
1225 int i;
1226
1227 if (ev_is_active (&pipeev))
1228 {
1229 ev_ref (EV_A); /* signal watcher */
1230 ev_io_stop (EV_A_ &pipeev);
1231
1232#if EV_USE_EVENTFD
1233 if (evfd >= 0)
1234 close (evfd);
1235#endif
1236
1237 if (evpipe [0] >= 0)
1238 {
1239 close (evpipe [0]);
1240 close (evpipe [1]);
1241 }
1242 }
1243
1244#if EV_USE_INOTIFY
1245 if (fs_fd >= 0)
1246 close (fs_fd);
1247#endif
1248
1249 if (backend_fd >= 0)
1250 close (backend_fd);
1251
1252#if EV_USE_PORT
1253 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1254#endif
605#if EV_USE_KQUEUE 1255#if EV_USE_KQUEUE
606 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1256 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
607#endif 1257#endif
608#if EV_USE_EPOLL 1258#if EV_USE_EPOLL
609 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1259 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
610#endif 1260#endif
611#if EV_USEV_POLL 1261#if EV_USE_POLL
612 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1262 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
613#endif 1263#endif
614#if EV_USE_SELECT 1264#if EV_USE_SELECT
615 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1265 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
616#endif 1266#endif
617 1267
618 method = 0; 1268 for (i = NUMPRI; i--; )
619 /*TODO*/ 1269 {
620} 1270 array_free (pending, [i]);
1271#if EV_IDLE_ENABLE
1272 array_free (idle, [i]);
1273#endif
1274 }
621 1275
622void 1276 ev_free (anfds); anfdmax = 0;
1277
1278 /* have to use the microsoft-never-gets-it-right macro */
1279 array_free (fdchange, EMPTY);
1280 array_free (timer, EMPTY);
1281#if EV_PERIODIC_ENABLE
1282 array_free (periodic, EMPTY);
1283#endif
1284#if EV_FORK_ENABLE
1285 array_free (fork, EMPTY);
1286#endif
1287 array_free (prepare, EMPTY);
1288 array_free (check, EMPTY);
1289#if EV_ASYNC_ENABLE
1290 array_free (async, EMPTY);
1291#endif
1292
1293 backend = 0;
1294}
1295
1296#if EV_USE_INOTIFY
1297void inline_size infy_fork (EV_P);
1298#endif
1299
1300void inline_size
623loop_fork (EV_P) 1301loop_fork (EV_P)
624{ 1302{
625 /*TODO*/ 1303#if EV_USE_PORT
1304 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1305#endif
1306#if EV_USE_KQUEUE
1307 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1308#endif
626#if EV_USE_EPOLL 1309#if EV_USE_EPOLL
627 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1310 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
628#endif 1311#endif
629#if EV_USE_KQUEUE 1312#if EV_USE_INOTIFY
630 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 1313 infy_fork (EV_A);
631#endif 1314#endif
1315
1316 if (ev_is_active (&pipeev))
1317 {
1318 /* this "locks" the handlers against writing to the pipe */
1319 /* while we modify the fd vars */
1320 gotsig = 1;
1321#if EV_ASYNC_ENABLE
1322 gotasync = 1;
1323#endif
1324
1325 ev_ref (EV_A);
1326 ev_io_stop (EV_A_ &pipeev);
1327
1328#if EV_USE_EVENTFD
1329 if (evfd >= 0)
1330 close (evfd);
1331#endif
1332
1333 if (evpipe [0] >= 0)
1334 {
1335 close (evpipe [0]);
1336 close (evpipe [1]);
1337 }
1338
1339 evpipe_init (EV_A);
1340 /* now iterate over everything, in case we missed something */
1341 pipecb (EV_A_ &pipeev, EV_READ);
1342 }
1343
1344 postfork = 0;
632} 1345}
633 1346
634#if EV_MULTIPLICITY 1347#if EV_MULTIPLICITY
635struct ev_loop * 1348struct ev_loop *
636ev_loop_new (int methods) 1349ev_loop_new (unsigned int flags)
637{ 1350{
638 struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop)); 1351 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
639 1352
1353 memset (loop, 0, sizeof (struct ev_loop));
1354
640 loop_init (EV_A_ methods); 1355 loop_init (EV_A_ flags);
641 1356
642 if (ev_methods (EV_A)) 1357 if (ev_backend (EV_A))
643 return loop; 1358 return loop;
644 1359
645 return 0; 1360 return 0;
646} 1361}
647 1362
648void 1363void
649ev_loop_destroy (EV_P) 1364ev_loop_destroy (EV_P)
650{ 1365{
651 loop_destroy (EV_A); 1366 loop_destroy (EV_A);
652 free (loop); 1367 ev_free (loop);
653} 1368}
654 1369
655void 1370void
656ev_loop_fork (EV_P) 1371ev_loop_fork (EV_P)
657{ 1372{
658 loop_fork (EV_A); 1373 postfork = 1; /* must be in line with ev_default_fork */
659} 1374}
660 1375
661#endif 1376#endif
662 1377
663#if EV_MULTIPLICITY 1378#if EV_MULTIPLICITY
664struct ev_loop default_loop_struct;
665static struct ev_loop *default_loop;
666
667struct ev_loop * 1379struct ev_loop *
1380ev_default_loop_init (unsigned int flags)
668#else 1381#else
669static int default_loop;
670
671int 1382int
1383ev_default_loop (unsigned int flags)
672#endif 1384#endif
673ev_default_loop (int methods)
674{ 1385{
675 if (sigpipe [0] == sigpipe [1])
676 if (pipe (sigpipe))
677 return 0;
678
679 if (!default_loop) 1386 if (!ev_default_loop_ptr)
680 { 1387 {
681#if EV_MULTIPLICITY 1388#if EV_MULTIPLICITY
682 struct ev_loop *loop = default_loop = &default_loop_struct; 1389 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
683#else 1390#else
684 default_loop = 1; 1391 ev_default_loop_ptr = 1;
685#endif 1392#endif
686 1393
687 loop_init (EV_A_ methods); 1394 loop_init (EV_A_ flags);
688 1395
689 if (ev_method (EV_A)) 1396 if (ev_backend (EV_A))
690 { 1397 {
691 ev_watcher_init (&sigev, sigcb);
692 ev_set_priority (&sigev, EV_MAXPRI);
693 siginit (EV_A);
694
695#ifndef WIN32 1398#ifndef _WIN32
696 ev_signal_init (&childev, childcb, SIGCHLD); 1399 ev_signal_init (&childev, childcb, SIGCHLD);
697 ev_set_priority (&childev, EV_MAXPRI); 1400 ev_set_priority (&childev, EV_MAXPRI);
698 ev_signal_start (EV_A_ &childev); 1401 ev_signal_start (EV_A_ &childev);
699 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1402 ev_unref (EV_A); /* child watcher should not keep loop alive */
700#endif 1403#endif
701 } 1404 }
702 else 1405 else
703 default_loop = 0; 1406 ev_default_loop_ptr = 0;
704 } 1407 }
705 1408
706 return default_loop; 1409 return ev_default_loop_ptr;
707} 1410}
708 1411
709void 1412void
710ev_default_destroy (void) 1413ev_default_destroy (void)
711{ 1414{
712#if EV_MULTIPLICITY 1415#if EV_MULTIPLICITY
713 struct ev_loop *loop = default_loop; 1416 struct ev_loop *loop = ev_default_loop_ptr;
714#endif 1417#endif
715 1418
1419#ifndef _WIN32
716 ev_ref (EV_A); /* child watcher */ 1420 ev_ref (EV_A); /* child watcher */
717 ev_signal_stop (EV_A_ &childev); 1421 ev_signal_stop (EV_A_ &childev);
718 1422#endif
719 ev_ref (EV_A); /* signal watcher */
720 ev_io_stop (EV_A_ &sigev);
721
722 close (sigpipe [0]); sigpipe [0] = 0;
723 close (sigpipe [1]); sigpipe [1] = 0;
724 1423
725 loop_destroy (EV_A); 1424 loop_destroy (EV_A);
726} 1425}
727 1426
728void 1427void
729ev_default_fork (EV_P) 1428ev_default_fork (void)
730{ 1429{
731 loop_fork (EV_A); 1430#if EV_MULTIPLICITY
1431 struct ev_loop *loop = ev_default_loop_ptr;
1432#endif
732 1433
733 ev_io_stop (EV_A_ &sigev); 1434 if (backend)
734 close (sigpipe [0]); 1435 postfork = 1; /* must be in line with ev_loop_fork */
735 close (sigpipe [1]);
736 pipe (sigpipe);
737
738 ev_ref (EV_A); /* signal watcher */
739 siginit (EV_A);
740} 1436}
741 1437
742/*****************************************************************************/ 1438/*****************************************************************************/
743 1439
744static void 1440void
1441ev_invoke (EV_P_ void *w, int revents)
1442{
1443 EV_CB_INVOKE ((W)w, revents);
1444}
1445
1446void inline_speed
745call_pending (EV_P) 1447call_pending (EV_P)
746{ 1448{
747 int pri; 1449 int pri;
748 1450
749 for (pri = NUMPRI; pri--; ) 1451 for (pri = NUMPRI; pri--; )
750 while (pendingcnt [pri]) 1452 while (pendingcnt [pri])
751 { 1453 {
752 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1454 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
753 1455
754 if (p->w) 1456 if (expect_true (p->w))
755 { 1457 {
1458 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1459
756 p->w->pending = 0; 1460 p->w->pending = 0;
757 p->w->cb (EV_A_ p->w, p->events); 1461 EV_CB_INVOKE (p->w, p->events);
758 } 1462 }
759 } 1463 }
760} 1464}
761 1465
762static void 1466void inline_size
763timers_reify (EV_P) 1467timers_reify (EV_P)
764{ 1468{
765 while (timercnt && timers [0]->at <= mn_now) 1469 while (timercnt && ev_at (timers [1]) <= mn_now)
766 { 1470 {
767 struct ev_timer *w = timers [0]; 1471 ev_timer *w = (ev_timer *)timers [1];
1472
1473 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
768 1474
769 /* first reschedule or stop timer */ 1475 /* first reschedule or stop timer */
770 if (w->repeat) 1476 if (w->repeat)
771 { 1477 {
772 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1478 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
773 w->at = mn_now + w->repeat; 1479
1480 ev_at (w) += w->repeat;
1481 if (ev_at (w) < mn_now)
1482 ev_at (w) = mn_now;
1483
774 downheap ((WT *)timers, timercnt, 0); 1484 downheap (timers, timercnt, 1);
775 } 1485 }
776 else 1486 else
777 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1487 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
778 1488
779 event (EV_A_ (W)w, EV_TIMEOUT); 1489 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
780 } 1490 }
781} 1491}
782 1492
783static void 1493#if EV_PERIODIC_ENABLE
1494void inline_size
784periodics_reify (EV_P) 1495periodics_reify (EV_P)
785{ 1496{
786 while (periodiccnt && periodics [0]->at <= rt_now) 1497 while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
787 { 1498 {
788 struct ev_periodic *w = periodics [0]; 1499 ev_periodic *w = (ev_periodic *)periodics [1];
1500
1501 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
789 1502
790 /* first reschedule or stop timer */ 1503 /* first reschedule or stop timer */
791 if (w->interval) 1504 if (w->reschedule_cb)
792 { 1505 {
1506 ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1507 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
1508 downheap (periodics, periodiccnt, 1);
1509 }
1510 else if (w->interval)
1511 {
793 w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval; 1512 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1513 if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
794 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now)); 1514 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
795 downheap ((WT *)periodics, periodiccnt, 0); 1515 downheap (periodics, periodiccnt, 1);
796 } 1516 }
797 else 1517 else
798 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1518 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
799 1519
800 event (EV_A_ (W)w, EV_PERIODIC); 1520 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
801 } 1521 }
802} 1522}
803 1523
804static void 1524static void noinline
805periodics_reschedule (EV_P) 1525periodics_reschedule (EV_P)
806{ 1526{
807 int i; 1527 int i;
808 1528
809 /* adjust periodics after time jump */ 1529 /* adjust periodics after time jump */
810 for (i = 0; i < periodiccnt; ++i) 1530 for (i = 1; i <= periodiccnt; ++i)
811 { 1531 {
812 struct ev_periodic *w = periodics [i]; 1532 ev_periodic *w = (ev_periodic *)periodics [i];
813 1533
1534 if (w->reschedule_cb)
1535 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
814 if (w->interval) 1536 else if (w->interval)
1537 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1538 }
1539
1540 /* now rebuild the heap */
1541 for (i = periodiccnt >> 1; i--; )
1542 downheap (periodics, periodiccnt, i);
1543}
1544#endif
1545
1546#if EV_IDLE_ENABLE
1547void inline_size
1548idle_reify (EV_P)
1549{
1550 if (expect_false (idleall))
1551 {
1552 int pri;
1553
1554 for (pri = NUMPRI; pri--; )
815 { 1555 {
816 ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval; 1556 if (pendingcnt [pri])
1557 break;
817 1558
818 if (fabs (diff) >= 1e-4) 1559 if (idlecnt [pri])
819 { 1560 {
820 ev_periodic_stop (EV_A_ w); 1561 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
821 ev_periodic_start (EV_A_ w); 1562 break;
822
823 i = 0; /* restart loop, inefficient, but time jumps should be rare */
824 } 1563 }
825 } 1564 }
826 } 1565 }
827} 1566}
1567#endif
828 1568
829inline int 1569void inline_speed
830time_update_monotonic (EV_P) 1570time_update (EV_P_ ev_tstamp max_block)
831{
832 mn_now = get_clock ();
833
834 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
835 {
836 rt_now = rtmn_diff + mn_now;
837 return 0;
838 }
839 else
840 {
841 now_floor = mn_now;
842 rt_now = ev_time ();
843 return 1;
844 }
845}
846
847static void
848time_update (EV_P)
849{ 1571{
850 int i; 1572 int i;
851 1573
852#if EV_USE_MONOTONIC 1574#if EV_USE_MONOTONIC
853 if (expect_true (have_monotonic)) 1575 if (expect_true (have_monotonic))
854 { 1576 {
855 if (time_update_monotonic (EV_A)) 1577 ev_tstamp odiff = rtmn_diff;
1578
1579 mn_now = get_clock ();
1580
1581 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1582 /* interpolate in the meantime */
1583 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
856 { 1584 {
857 ev_tstamp odiff = rtmn_diff; 1585 ev_rt_now = rtmn_diff + mn_now;
1586 return;
1587 }
858 1588
1589 now_floor = mn_now;
1590 ev_rt_now = ev_time ();
1591
859 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1592 /* loop a few times, before making important decisions.
1593 * on the choice of "4": one iteration isn't enough,
1594 * in case we get preempted during the calls to
1595 * ev_time and get_clock. a second call is almost guaranteed
1596 * to succeed in that case, though. and looping a few more times
1597 * doesn't hurt either as we only do this on time-jumps or
1598 * in the unlikely event of having been preempted here.
1599 */
1600 for (i = 4; --i; )
860 { 1601 {
861 rtmn_diff = rt_now - mn_now; 1602 rtmn_diff = ev_rt_now - mn_now;
862 1603
863 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1604 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
864 return; /* all is well */ 1605 return; /* all is well */
865 1606
866 rt_now = ev_time (); 1607 ev_rt_now = ev_time ();
867 mn_now = get_clock (); 1608 mn_now = get_clock ();
868 now_floor = mn_now; 1609 now_floor = mn_now;
869 } 1610 }
870 1611
1612# if EV_PERIODIC_ENABLE
1613 periodics_reschedule (EV_A);
1614# endif
1615 /* no timer adjustment, as the monotonic clock doesn't jump */
1616 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1617 }
1618 else
1619#endif
1620 {
1621 ev_rt_now = ev_time ();
1622
1623 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1624 {
1625#if EV_PERIODIC_ENABLE
871 periodics_reschedule (EV_A); 1626 periodics_reschedule (EV_A);
872 /* no timer adjustment, as the monotonic clock doesn't jump */ 1627#endif
873 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */ 1628 /* adjust timers. this is easy, as the offset is the same for all of them */
1629 for (i = 1; i <= timercnt; ++i)
1630 ev_at (timers [i]) += ev_rt_now - mn_now;
874 } 1631 }
875 }
876 else
877#endif
878 {
879 rt_now = ev_time ();
880 1632
881 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
882 {
883 periodics_reschedule (EV_A);
884
885 /* adjust timers. this is easy, as the offset is the same for all */
886 for (i = 0; i < timercnt; ++i)
887 timers [i]->at += rt_now - mn_now;
888 }
889
890 mn_now = rt_now; 1633 mn_now = ev_rt_now;
891 } 1634 }
892} 1635}
893 1636
894void 1637void
895ev_ref (EV_P) 1638ev_ref (EV_P)
… …
906static int loop_done; 1649static int loop_done;
907 1650
908void 1651void
909ev_loop (EV_P_ int flags) 1652ev_loop (EV_P_ int flags)
910{ 1653{
911 double block; 1654 loop_done = EVUNLOOP_CANCEL;
912 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1655
1656 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
913 1657
914 do 1658 do
915 { 1659 {
1660#ifndef _WIN32
1661 if (expect_false (curpid)) /* penalise the forking check even more */
1662 if (expect_false (getpid () != curpid))
1663 {
1664 curpid = getpid ();
1665 postfork = 1;
1666 }
1667#endif
1668
1669#if EV_FORK_ENABLE
1670 /* we might have forked, so queue fork handlers */
1671 if (expect_false (postfork))
1672 if (forkcnt)
1673 {
1674 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1675 call_pending (EV_A);
1676 }
1677#endif
1678
916 /* queue check watchers (and execute them) */ 1679 /* queue prepare watchers (and execute them) */
917 if (expect_false (preparecnt)) 1680 if (expect_false (preparecnt))
918 { 1681 {
919 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1682 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
920 call_pending (EV_A); 1683 call_pending (EV_A);
921 } 1684 }
922 1685
1686 if (expect_false (!activecnt))
1687 break;
1688
1689 /* we might have forked, so reify kernel state if necessary */
1690 if (expect_false (postfork))
1691 loop_fork (EV_A);
1692
923 /* update fd-related kernel structures */ 1693 /* update fd-related kernel structures */
924 fd_reify (EV_A); 1694 fd_reify (EV_A);
925 1695
926 /* calculate blocking time */ 1696 /* calculate blocking time */
1697 {
1698 ev_tstamp waittime = 0.;
1699 ev_tstamp sleeptime = 0.;
927 1700
928 /* we only need this for !monotonic clockor timers, but as we basically 1701 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
929 always have timers, we just calculate it always */
930#if EV_USE_MONOTONIC
931 if (expect_true (have_monotonic))
932 time_update_monotonic (EV_A);
933 else
934#endif
935 { 1702 {
936 rt_now = ev_time (); 1703 /* update time to cancel out callback processing overhead */
937 mn_now = rt_now; 1704 time_update (EV_A_ 1e100);
938 }
939 1705
940 if (flags & EVLOOP_NONBLOCK || idlecnt)
941 block = 0.;
942 else
943 {
944 block = MAX_BLOCKTIME; 1706 waittime = MAX_BLOCKTIME;
945 1707
946 if (timercnt) 1708 if (timercnt)
947 { 1709 {
948 ev_tstamp to = timers [0]->at - mn_now + method_fudge; 1710 ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge;
949 if (block > to) block = to; 1711 if (waittime > to) waittime = to;
950 } 1712 }
951 1713
1714#if EV_PERIODIC_ENABLE
952 if (periodiccnt) 1715 if (periodiccnt)
953 { 1716 {
954 ev_tstamp to = periodics [0]->at - rt_now + method_fudge; 1717 ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge;
955 if (block > to) block = to; 1718 if (waittime > to) waittime = to;
956 } 1719 }
1720#endif
957 1721
958 if (block < 0.) block = 0.; 1722 if (expect_false (waittime < timeout_blocktime))
1723 waittime = timeout_blocktime;
1724
1725 sleeptime = waittime - backend_fudge;
1726
1727 if (expect_true (sleeptime > io_blocktime))
1728 sleeptime = io_blocktime;
1729
1730 if (sleeptime)
1731 {
1732 ev_sleep (sleeptime);
1733 waittime -= sleeptime;
1734 }
959 } 1735 }
960 1736
961 method_poll (EV_A_ block); 1737 ++loop_count;
1738 backend_poll (EV_A_ waittime);
962 1739
963 /* update rt_now, do magic */ 1740 /* update ev_rt_now, do magic */
964 time_update (EV_A); 1741 time_update (EV_A_ waittime + sleeptime);
1742 }
965 1743
966 /* queue pending timers and reschedule them */ 1744 /* queue pending timers and reschedule them */
967 timers_reify (EV_A); /* relative timers called last */ 1745 timers_reify (EV_A); /* relative timers called last */
1746#if EV_PERIODIC_ENABLE
968 periodics_reify (EV_A); /* absolute timers called first */ 1747 periodics_reify (EV_A); /* absolute timers called first */
1748#endif
969 1749
1750#if EV_IDLE_ENABLE
970 /* queue idle watchers unless io or timers are pending */ 1751 /* queue idle watchers unless other events are pending */
971 if (!pendingcnt) 1752 idle_reify (EV_A);
972 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 1753#endif
973 1754
974 /* queue check watchers, to be executed first */ 1755 /* queue check watchers, to be executed first */
975 if (checkcnt) 1756 if (expect_false (checkcnt))
976 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 1757 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
977 1758
978 call_pending (EV_A); 1759 call_pending (EV_A);
979 } 1760 }
980 while (activecnt && !loop_done); 1761 while (expect_true (
1762 activecnt
1763 && !loop_done
1764 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1765 ));
981 1766
982 if (loop_done != 2) 1767 if (loop_done == EVUNLOOP_ONE)
983 loop_done = 0; 1768 loop_done = EVUNLOOP_CANCEL;
984} 1769}
985 1770
986void 1771void
987ev_unloop (EV_P_ int how) 1772ev_unloop (EV_P_ int how)
988{ 1773{
989 loop_done = how; 1774 loop_done = how;
990} 1775}
991 1776
992/*****************************************************************************/ 1777/*****************************************************************************/
993 1778
994inline void 1779void inline_size
995wlist_add (WL *head, WL elem) 1780wlist_add (WL *head, WL elem)
996{ 1781{
997 elem->next = *head; 1782 elem->next = *head;
998 *head = elem; 1783 *head = elem;
999} 1784}
1000 1785
1001inline void 1786void inline_size
1002wlist_del (WL *head, WL elem) 1787wlist_del (WL *head, WL elem)
1003{ 1788{
1004 while (*head) 1789 while (*head)
1005 { 1790 {
1006 if (*head == elem) 1791 if (*head == elem)
… …
1011 1796
1012 head = &(*head)->next; 1797 head = &(*head)->next;
1013 } 1798 }
1014} 1799}
1015 1800
1016inline void 1801void inline_speed
1017ev_clear_pending (EV_P_ W w) 1802clear_pending (EV_P_ W w)
1018{ 1803{
1019 if (w->pending) 1804 if (w->pending)
1020 { 1805 {
1021 pendings [ABSPRI (w)][w->pending - 1].w = 0; 1806 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1022 w->pending = 0; 1807 w->pending = 0;
1023 } 1808 }
1024} 1809}
1025 1810
1026inline void 1811int
1812ev_clear_pending (EV_P_ void *w)
1813{
1814 W w_ = (W)w;
1815 int pending = w_->pending;
1816
1817 if (expect_true (pending))
1818 {
1819 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1820 w_->pending = 0;
1821 p->w = 0;
1822 return p->events;
1823 }
1824 else
1825 return 0;
1826}
1827
1828void inline_size
1829pri_adjust (EV_P_ W w)
1830{
1831 int pri = w->priority;
1832 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1833 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1834 w->priority = pri;
1835}
1836
1837void inline_speed
1027ev_start (EV_P_ W w, int active) 1838ev_start (EV_P_ W w, int active)
1028{ 1839{
1029 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 1840 pri_adjust (EV_A_ w);
1030 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1031
1032 w->active = active; 1841 w->active = active;
1033 ev_ref (EV_A); 1842 ev_ref (EV_A);
1034} 1843}
1035 1844
1036inline void 1845void inline_size
1037ev_stop (EV_P_ W w) 1846ev_stop (EV_P_ W w)
1038{ 1847{
1039 ev_unref (EV_A); 1848 ev_unref (EV_A);
1040 w->active = 0; 1849 w->active = 0;
1041} 1850}
1042 1851
1043/*****************************************************************************/ 1852/*****************************************************************************/
1044 1853
1045void 1854void noinline
1046ev_io_start (EV_P_ struct ev_io *w) 1855ev_io_start (EV_P_ ev_io *w)
1047{ 1856{
1048 int fd = w->fd; 1857 int fd = w->fd;
1049 1858
1050 if (ev_is_active (w)) 1859 if (expect_false (ev_is_active (w)))
1051 return; 1860 return;
1052 1861
1053 assert (("ev_io_start called with negative fd", fd >= 0)); 1862 assert (("ev_io_start called with negative fd", fd >= 0));
1054 1863
1055 ev_start (EV_A_ (W)w, 1); 1864 ev_start (EV_A_ (W)w, 1);
1056 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1865 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1057 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1866 wlist_add (&anfds[fd].head, (WL)w);
1058 1867
1059 fd_change (EV_A_ fd); 1868 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1869 w->events &= ~EV_IOFDSET;
1060} 1870}
1061 1871
1062void 1872void noinline
1063ev_io_stop (EV_P_ struct ev_io *w) 1873ev_io_stop (EV_P_ ev_io *w)
1064{ 1874{
1065 ev_clear_pending (EV_A_ (W)w); 1875 clear_pending (EV_A_ (W)w);
1066 if (!ev_is_active (w)) 1876 if (expect_false (!ev_is_active (w)))
1067 return; 1877 return;
1068 1878
1879 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1880
1069 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1881 wlist_del (&anfds[w->fd].head, (WL)w);
1070 ev_stop (EV_A_ (W)w); 1882 ev_stop (EV_A_ (W)w);
1071 1883
1072 fd_change (EV_A_ w->fd); 1884 fd_change (EV_A_ w->fd, 1);
1073} 1885}
1074 1886
1075void 1887void noinline
1076ev_timer_start (EV_P_ struct ev_timer *w) 1888ev_timer_start (EV_P_ ev_timer *w)
1077{ 1889{
1078 if (ev_is_active (w)) 1890 if (expect_false (ev_is_active (w)))
1079 return; 1891 return;
1080 1892
1081 w->at += mn_now; 1893 ev_at (w) += mn_now;
1082 1894
1083 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 1895 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1084 1896
1085 ev_start (EV_A_ (W)w, ++timercnt); 1897 ev_start (EV_A_ (W)w, ++timercnt);
1086 array_needsize (timers, timermax, timercnt, ); 1898 array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2);
1087 timers [timercnt - 1] = w; 1899 timers [timercnt] = (WT)w;
1088 upheap ((WT *)timers, timercnt - 1); 1900 upheap (timers, timercnt);
1089}
1090 1901
1091void 1902 /*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
1903}
1904
1905void noinline
1092ev_timer_stop (EV_P_ struct ev_timer *w) 1906ev_timer_stop (EV_P_ ev_timer *w)
1093{ 1907{
1094 ev_clear_pending (EV_A_ (W)w); 1908 clear_pending (EV_A_ (W)w);
1095 if (!ev_is_active (w)) 1909 if (expect_false (!ev_is_active (w)))
1096 return; 1910 return;
1097 1911
1098 if (w->active < timercnt--) 1912 {
1913 int active = ev_active (w);
1914
1915 assert (("internal timer heap corruption", timers [active] == (WT)w));
1916
1917 if (expect_true (active < timercnt))
1099 { 1918 {
1100 timers [w->active - 1] = timers [timercnt]; 1919 timers [active] = timers [timercnt];
1101 downheap ((WT *)timers, timercnt, w->active - 1); 1920 adjustheap (timers, timercnt, active);
1102 } 1921 }
1103 1922
1104 w->at = w->repeat; 1923 --timercnt;
1924 }
1925
1926 ev_at (w) -= mn_now;
1105 1927
1106 ev_stop (EV_A_ (W)w); 1928 ev_stop (EV_A_ (W)w);
1107} 1929}
1108 1930
1109void 1931void noinline
1110ev_timer_again (EV_P_ struct ev_timer *w) 1932ev_timer_again (EV_P_ ev_timer *w)
1111{ 1933{
1112 if (ev_is_active (w)) 1934 if (ev_is_active (w))
1113 { 1935 {
1114 if (w->repeat) 1936 if (w->repeat)
1115 { 1937 {
1116 w->at = mn_now + w->repeat; 1938 ev_at (w) = mn_now + w->repeat;
1117 downheap ((WT *)timers, timercnt, w->active - 1); 1939 adjustheap (timers, timercnt, ev_active (w));
1118 } 1940 }
1119 else 1941 else
1120 ev_timer_stop (EV_A_ w); 1942 ev_timer_stop (EV_A_ w);
1121 } 1943 }
1122 else if (w->repeat) 1944 else if (w->repeat)
1945 {
1946 ev_at (w) = w->repeat;
1123 ev_timer_start (EV_A_ w); 1947 ev_timer_start (EV_A_ w);
1948 }
1124} 1949}
1125 1950
1126void 1951#if EV_PERIODIC_ENABLE
1952void noinline
1127ev_periodic_start (EV_P_ struct ev_periodic *w) 1953ev_periodic_start (EV_P_ ev_periodic *w)
1128{ 1954{
1129 if (ev_is_active (w)) 1955 if (expect_false (ev_is_active (w)))
1130 return; 1956 return;
1131 1957
1958 if (w->reschedule_cb)
1959 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1960 else if (w->interval)
1961 {
1132 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 1962 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1133
1134 /* this formula differs from the one in periodic_reify because we do not always round up */ 1963 /* this formula differs from the one in periodic_reify because we do not always round up */
1135 if (w->interval)
1136 w->at += ceil ((rt_now - w->at) / w->interval) * w->interval; 1964 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1965 }
1966 else
1967 ev_at (w) = w->offset;
1137 1968
1138 ev_start (EV_A_ (W)w, ++periodiccnt); 1969 ev_start (EV_A_ (W)w, ++periodiccnt);
1139 array_needsize (periodics, periodicmax, periodiccnt, ); 1970 array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2);
1140 periodics [periodiccnt - 1] = w; 1971 periodics [periodiccnt] = (WT)w;
1141 upheap ((WT *)periodics, periodiccnt - 1); 1972 upheap (periodics, periodiccnt);
1142}
1143 1973
1144void 1974 /*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
1975}
1976
1977void noinline
1145ev_periodic_stop (EV_P_ struct ev_periodic *w) 1978ev_periodic_stop (EV_P_ ev_periodic *w)
1146{ 1979{
1147 ev_clear_pending (EV_A_ (W)w); 1980 clear_pending (EV_A_ (W)w);
1148 if (!ev_is_active (w)) 1981 if (expect_false (!ev_is_active (w)))
1149 return; 1982 return;
1150 1983
1151 if (w->active < periodiccnt--) 1984 {
1985 int active = ev_active (w);
1986
1987 assert (("internal periodic heap corruption", periodics [active] == (WT)w));
1988
1989 if (expect_true (active < periodiccnt))
1152 { 1990 {
1153 periodics [w->active - 1] = periodics [periodiccnt]; 1991 periodics [active] = periodics [periodiccnt];
1154 downheap ((WT *)periodics, periodiccnt, w->active - 1); 1992 adjustheap (periodics, periodiccnt, active);
1155 } 1993 }
1994
1995 --periodiccnt;
1996 }
1156 1997
1157 ev_stop (EV_A_ (W)w); 1998 ev_stop (EV_A_ (W)w);
1158} 1999}
1159 2000
1160void 2001void noinline
1161ev_idle_start (EV_P_ struct ev_idle *w) 2002ev_periodic_again (EV_P_ ev_periodic *w)
1162{ 2003{
1163 if (ev_is_active (w)) 2004 /* TODO: use adjustheap and recalculation */
1164 return;
1165
1166 ev_start (EV_A_ (W)w, ++idlecnt);
1167 array_needsize (idles, idlemax, idlecnt, );
1168 idles [idlecnt - 1] = w;
1169}
1170
1171void
1172ev_idle_stop (EV_P_ struct ev_idle *w)
1173{
1174 ev_clear_pending (EV_A_ (W)w);
1175 if (ev_is_active (w))
1176 return;
1177
1178 idles [w->active - 1] = idles [--idlecnt];
1179 ev_stop (EV_A_ (W)w); 2005 ev_periodic_stop (EV_A_ w);
2006 ev_periodic_start (EV_A_ w);
1180} 2007}
1181 2008#endif
1182void
1183ev_prepare_start (EV_P_ struct ev_prepare *w)
1184{
1185 if (ev_is_active (w))
1186 return;
1187
1188 ev_start (EV_A_ (W)w, ++preparecnt);
1189 array_needsize (prepares, preparemax, preparecnt, );
1190 prepares [preparecnt - 1] = w;
1191}
1192
1193void
1194ev_prepare_stop (EV_P_ struct ev_prepare *w)
1195{
1196 ev_clear_pending (EV_A_ (W)w);
1197 if (ev_is_active (w))
1198 return;
1199
1200 prepares [w->active - 1] = prepares [--preparecnt];
1201 ev_stop (EV_A_ (W)w);
1202}
1203
1204void
1205ev_check_start (EV_P_ struct ev_check *w)
1206{
1207 if (ev_is_active (w))
1208 return;
1209
1210 ev_start (EV_A_ (W)w, ++checkcnt);
1211 array_needsize (checks, checkmax, checkcnt, );
1212 checks [checkcnt - 1] = w;
1213}
1214
1215void
1216ev_check_stop (EV_P_ struct ev_check *w)
1217{
1218 ev_clear_pending (EV_A_ (W)w);
1219 if (ev_is_active (w))
1220 return;
1221
1222 checks [w->active - 1] = checks [--checkcnt];
1223 ev_stop (EV_A_ (W)w);
1224}
1225 2009
1226#ifndef SA_RESTART 2010#ifndef SA_RESTART
1227# define SA_RESTART 0 2011# define SA_RESTART 0
1228#endif 2012#endif
1229 2013
1230void 2014void noinline
1231ev_signal_start (EV_P_ struct ev_signal *w) 2015ev_signal_start (EV_P_ ev_signal *w)
1232{ 2016{
1233#if EV_MULTIPLICITY 2017#if EV_MULTIPLICITY
1234 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2018 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1235#endif 2019#endif
1236 if (ev_is_active (w)) 2020 if (expect_false (ev_is_active (w)))
1237 return; 2021 return;
1238 2022
1239 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2023 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1240 2024
2025 evpipe_init (EV_A);
2026
2027 {
2028#ifndef _WIN32
2029 sigset_t full, prev;
2030 sigfillset (&full);
2031 sigprocmask (SIG_SETMASK, &full, &prev);
2032#endif
2033
2034 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2035
2036#ifndef _WIN32
2037 sigprocmask (SIG_SETMASK, &prev, 0);
2038#endif
2039 }
2040
1241 ev_start (EV_A_ (W)w, 1); 2041 ev_start (EV_A_ (W)w, 1);
1242 array_needsize (signals, signalmax, w->signum, signals_init);
1243 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2042 wlist_add (&signals [w->signum - 1].head, (WL)w);
1244 2043
1245 if (!w->next) 2044 if (!((WL)w)->next)
1246 { 2045 {
2046#if _WIN32
2047 signal (w->signum, ev_sighandler);
2048#else
1247 struct sigaction sa; 2049 struct sigaction sa;
1248 sa.sa_handler = sighandler; 2050 sa.sa_handler = ev_sighandler;
1249 sigfillset (&sa.sa_mask); 2051 sigfillset (&sa.sa_mask);
1250 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2052 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1251 sigaction (w->signum, &sa, 0); 2053 sigaction (w->signum, &sa, 0);
2054#endif
1252 } 2055 }
1253} 2056}
1254 2057
1255void 2058void noinline
1256ev_signal_stop (EV_P_ struct ev_signal *w) 2059ev_signal_stop (EV_P_ ev_signal *w)
1257{ 2060{
1258 ev_clear_pending (EV_A_ (W)w); 2061 clear_pending (EV_A_ (W)w);
1259 if (!ev_is_active (w)) 2062 if (expect_false (!ev_is_active (w)))
1260 return; 2063 return;
1261 2064
1262 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2065 wlist_del (&signals [w->signum - 1].head, (WL)w);
1263 ev_stop (EV_A_ (W)w); 2066 ev_stop (EV_A_ (W)w);
1264 2067
1265 if (!signals [w->signum - 1].head) 2068 if (!signals [w->signum - 1].head)
1266 signal (w->signum, SIG_DFL); 2069 signal (w->signum, SIG_DFL);
1267} 2070}
1268 2071
1269void 2072void
1270ev_child_start (EV_P_ struct ev_child *w) 2073ev_child_start (EV_P_ ev_child *w)
1271{ 2074{
1272#if EV_MULTIPLICITY 2075#if EV_MULTIPLICITY
1273 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2076 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1274#endif 2077#endif
1275 if (ev_is_active (w)) 2078 if (expect_false (ev_is_active (w)))
1276 return; 2079 return;
1277 2080
1278 ev_start (EV_A_ (W)w, 1); 2081 ev_start (EV_A_ (W)w, 1);
1279 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2082 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1280} 2083}
1281 2084
1282void 2085void
1283ev_child_stop (EV_P_ struct ev_child *w) 2086ev_child_stop (EV_P_ ev_child *w)
1284{ 2087{
1285 ev_clear_pending (EV_A_ (W)w); 2088 clear_pending (EV_A_ (W)w);
1286 if (ev_is_active (w)) 2089 if (expect_false (!ev_is_active (w)))
1287 return; 2090 return;
1288 2091
1289 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2092 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1290 ev_stop (EV_A_ (W)w); 2093 ev_stop (EV_A_ (W)w);
1291} 2094}
1292 2095
2096#if EV_STAT_ENABLE
2097
2098# ifdef _WIN32
2099# undef lstat
2100# define lstat(a,b) _stati64 (a,b)
2101# endif
2102
2103#define DEF_STAT_INTERVAL 5.0074891
2104#define MIN_STAT_INTERVAL 0.1074891
2105
2106static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2107
2108#if EV_USE_INOTIFY
2109# define EV_INOTIFY_BUFSIZE 8192
2110
2111static void noinline
2112infy_add (EV_P_ ev_stat *w)
2113{
2114 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);
2115
2116 if (w->wd < 0)
2117 {
2118 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2119
2120 /* monitor some parent directory for speedup hints */
2121 /* note that exceeding the hardcoded limit is not a correctness issue, */
2122 /* but an efficiency issue only */
2123 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2124 {
2125 char path [4096];
2126 strcpy (path, w->path);
2127
2128 do
2129 {
2130 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2131 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2132
2133 char *pend = strrchr (path, '/');
2134
2135 if (!pend)
2136 break; /* whoops, no '/', complain to your admin */
2137
2138 *pend = 0;
2139 w->wd = inotify_add_watch (fs_fd, path, mask);
2140 }
2141 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2142 }
2143 }
2144 else
2145 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2146
2147 if (w->wd >= 0)
2148 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2149}
2150
2151static void noinline
2152infy_del (EV_P_ ev_stat *w)
2153{
2154 int slot;
2155 int wd = w->wd;
2156
2157 if (wd < 0)
2158 return;
2159
2160 w->wd = -2;
2161 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2162 wlist_del (&fs_hash [slot].head, (WL)w);
2163
2164 /* remove this watcher, if others are watching it, they will rearm */
2165 inotify_rm_watch (fs_fd, wd);
2166}
2167
2168static void noinline
2169infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2170{
2171 if (slot < 0)
2172 /* overflow, need to check for all hahs slots */
2173 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2174 infy_wd (EV_A_ slot, wd, ev);
2175 else
2176 {
2177 WL w_;
2178
2179 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2180 {
2181 ev_stat *w = (ev_stat *)w_;
2182 w_ = w_->next; /* lets us remove this watcher and all before it */
2183
2184 if (w->wd == wd || wd == -1)
2185 {
2186 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2187 {
2188 w->wd = -1;
2189 infy_add (EV_A_ w); /* re-add, no matter what */
2190 }
2191
2192 stat_timer_cb (EV_A_ &w->timer, 0);
2193 }
2194 }
2195 }
2196}
2197
2198static void
2199infy_cb (EV_P_ ev_io *w, int revents)
2200{
2201 char buf [EV_INOTIFY_BUFSIZE];
2202 struct inotify_event *ev = (struct inotify_event *)buf;
2203 int ofs;
2204 int len = read (fs_fd, buf, sizeof (buf));
2205
2206 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2207 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2208}
2209
2210void inline_size
2211infy_init (EV_P)
2212{
2213 if (fs_fd != -2)
2214 return;
2215
2216 fs_fd = inotify_init ();
2217
2218 if (fs_fd >= 0)
2219 {
2220 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2221 ev_set_priority (&fs_w, EV_MAXPRI);
2222 ev_io_start (EV_A_ &fs_w);
2223 }
2224}
2225
2226void inline_size
2227infy_fork (EV_P)
2228{
2229 int slot;
2230
2231 if (fs_fd < 0)
2232 return;
2233
2234 close (fs_fd);
2235 fs_fd = inotify_init ();
2236
2237 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2238 {
2239 WL w_ = fs_hash [slot].head;
2240 fs_hash [slot].head = 0;
2241
2242 while (w_)
2243 {
2244 ev_stat *w = (ev_stat *)w_;
2245 w_ = w_->next; /* lets us add this watcher */
2246
2247 w->wd = -1;
2248
2249 if (fs_fd >= 0)
2250 infy_add (EV_A_ w); /* re-add, no matter what */
2251 else
2252 ev_timer_start (EV_A_ &w->timer);
2253 }
2254
2255 }
2256}
2257
2258#endif
2259
2260void
2261ev_stat_stat (EV_P_ ev_stat *w)
2262{
2263 if (lstat (w->path, &w->attr) < 0)
2264 w->attr.st_nlink = 0;
2265 else if (!w->attr.st_nlink)
2266 w->attr.st_nlink = 1;
2267}
2268
2269static void noinline
2270stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2271{
2272 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2273
2274 /* we copy this here each the time so that */
2275 /* prev has the old value when the callback gets invoked */
2276 w->prev = w->attr;
2277 ev_stat_stat (EV_A_ w);
2278
2279 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2280 if (
2281 w->prev.st_dev != w->attr.st_dev
2282 || w->prev.st_ino != w->attr.st_ino
2283 || w->prev.st_mode != w->attr.st_mode
2284 || w->prev.st_nlink != w->attr.st_nlink
2285 || w->prev.st_uid != w->attr.st_uid
2286 || w->prev.st_gid != w->attr.st_gid
2287 || w->prev.st_rdev != w->attr.st_rdev
2288 || w->prev.st_size != w->attr.st_size
2289 || w->prev.st_atime != w->attr.st_atime
2290 || w->prev.st_mtime != w->attr.st_mtime
2291 || w->prev.st_ctime != w->attr.st_ctime
2292 ) {
2293 #if EV_USE_INOTIFY
2294 infy_del (EV_A_ w);
2295 infy_add (EV_A_ w);
2296 ev_stat_stat (EV_A_ w); /* avoid race... */
2297 #endif
2298
2299 ev_feed_event (EV_A_ w, EV_STAT);
2300 }
2301}
2302
2303void
2304ev_stat_start (EV_P_ ev_stat *w)
2305{
2306 if (expect_false (ev_is_active (w)))
2307 return;
2308
2309 /* since we use memcmp, we need to clear any padding data etc. */
2310 memset (&w->prev, 0, sizeof (ev_statdata));
2311 memset (&w->attr, 0, sizeof (ev_statdata));
2312
2313 ev_stat_stat (EV_A_ w);
2314
2315 if (w->interval < MIN_STAT_INTERVAL)
2316 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2317
2318 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2319 ev_set_priority (&w->timer, ev_priority (w));
2320
2321#if EV_USE_INOTIFY
2322 infy_init (EV_A);
2323
2324 if (fs_fd >= 0)
2325 infy_add (EV_A_ w);
2326 else
2327#endif
2328 ev_timer_start (EV_A_ &w->timer);
2329
2330 ev_start (EV_A_ (W)w, 1);
2331}
2332
2333void
2334ev_stat_stop (EV_P_ ev_stat *w)
2335{
2336 clear_pending (EV_A_ (W)w);
2337 if (expect_false (!ev_is_active (w)))
2338 return;
2339
2340#if EV_USE_INOTIFY
2341 infy_del (EV_A_ w);
2342#endif
2343 ev_timer_stop (EV_A_ &w->timer);
2344
2345 ev_stop (EV_A_ (W)w);
2346}
2347#endif
2348
2349#if EV_IDLE_ENABLE
2350void
2351ev_idle_start (EV_P_ ev_idle *w)
2352{
2353 if (expect_false (ev_is_active (w)))
2354 return;
2355
2356 pri_adjust (EV_A_ (W)w);
2357
2358 {
2359 int active = ++idlecnt [ABSPRI (w)];
2360
2361 ++idleall;
2362 ev_start (EV_A_ (W)w, active);
2363
2364 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2365 idles [ABSPRI (w)][active - 1] = w;
2366 }
2367}
2368
2369void
2370ev_idle_stop (EV_P_ ev_idle *w)
2371{
2372 clear_pending (EV_A_ (W)w);
2373 if (expect_false (!ev_is_active (w)))
2374 return;
2375
2376 {
2377 int active = ev_active (w);
2378
2379 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2380 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2381
2382 ev_stop (EV_A_ (W)w);
2383 --idleall;
2384 }
2385}
2386#endif
2387
2388void
2389ev_prepare_start (EV_P_ ev_prepare *w)
2390{
2391 if (expect_false (ev_is_active (w)))
2392 return;
2393
2394 ev_start (EV_A_ (W)w, ++preparecnt);
2395 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2396 prepares [preparecnt - 1] = w;
2397}
2398
2399void
2400ev_prepare_stop (EV_P_ ev_prepare *w)
2401{
2402 clear_pending (EV_A_ (W)w);
2403 if (expect_false (!ev_is_active (w)))
2404 return;
2405
2406 {
2407 int active = ev_active (w);
2408
2409 prepares [active - 1] = prepares [--preparecnt];
2410 ev_active (prepares [active - 1]) = active;
2411 }
2412
2413 ev_stop (EV_A_ (W)w);
2414}
2415
2416void
2417ev_check_start (EV_P_ ev_check *w)
2418{
2419 if (expect_false (ev_is_active (w)))
2420 return;
2421
2422 ev_start (EV_A_ (W)w, ++checkcnt);
2423 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2424 checks [checkcnt - 1] = w;
2425}
2426
2427void
2428ev_check_stop (EV_P_ ev_check *w)
2429{
2430 clear_pending (EV_A_ (W)w);
2431 if (expect_false (!ev_is_active (w)))
2432 return;
2433
2434 {
2435 int active = ev_active (w);
2436
2437 checks [active - 1] = checks [--checkcnt];
2438 ev_active (checks [active - 1]) = active;
2439 }
2440
2441 ev_stop (EV_A_ (W)w);
2442}
2443
2444#if EV_EMBED_ENABLE
2445void noinline
2446ev_embed_sweep (EV_P_ ev_embed *w)
2447{
2448 ev_loop (w->other, EVLOOP_NONBLOCK);
2449}
2450
2451static void
2452embed_io_cb (EV_P_ ev_io *io, int revents)
2453{
2454 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2455
2456 if (ev_cb (w))
2457 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2458 else
2459 ev_loop (w->other, EVLOOP_NONBLOCK);
2460}
2461
2462static void
2463embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2464{
2465 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2466
2467 {
2468 struct ev_loop *loop = w->other;
2469
2470 while (fdchangecnt)
2471 {
2472 fd_reify (EV_A);
2473 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2474 }
2475 }
2476}
2477
2478#if 0
2479static void
2480embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2481{
2482 ev_idle_stop (EV_A_ idle);
2483}
2484#endif
2485
2486void
2487ev_embed_start (EV_P_ ev_embed *w)
2488{
2489 if (expect_false (ev_is_active (w)))
2490 return;
2491
2492 {
2493 struct ev_loop *loop = w->other;
2494 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2495 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2496 }
2497
2498 ev_set_priority (&w->io, ev_priority (w));
2499 ev_io_start (EV_A_ &w->io);
2500
2501 ev_prepare_init (&w->prepare, embed_prepare_cb);
2502 ev_set_priority (&w->prepare, EV_MINPRI);
2503 ev_prepare_start (EV_A_ &w->prepare);
2504
2505 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2506
2507 ev_start (EV_A_ (W)w, 1);
2508}
2509
2510void
2511ev_embed_stop (EV_P_ ev_embed *w)
2512{
2513 clear_pending (EV_A_ (W)w);
2514 if (expect_false (!ev_is_active (w)))
2515 return;
2516
2517 ev_io_stop (EV_A_ &w->io);
2518 ev_prepare_stop (EV_A_ &w->prepare);
2519
2520 ev_stop (EV_A_ (W)w);
2521}
2522#endif
2523
2524#if EV_FORK_ENABLE
2525void
2526ev_fork_start (EV_P_ ev_fork *w)
2527{
2528 if (expect_false (ev_is_active (w)))
2529 return;
2530
2531 ev_start (EV_A_ (W)w, ++forkcnt);
2532 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2533 forks [forkcnt - 1] = w;
2534}
2535
2536void
2537ev_fork_stop (EV_P_ ev_fork *w)
2538{
2539 clear_pending (EV_A_ (W)w);
2540 if (expect_false (!ev_is_active (w)))
2541 return;
2542
2543 {
2544 int active = ev_active (w);
2545
2546 forks [active - 1] = forks [--forkcnt];
2547 ev_active (forks [active - 1]) = active;
2548 }
2549
2550 ev_stop (EV_A_ (W)w);
2551}
2552#endif
2553
2554#if EV_ASYNC_ENABLE
2555void
2556ev_async_start (EV_P_ ev_async *w)
2557{
2558 if (expect_false (ev_is_active (w)))
2559 return;
2560
2561 evpipe_init (EV_A);
2562
2563 ev_start (EV_A_ (W)w, ++asynccnt);
2564 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2565 asyncs [asynccnt - 1] = w;
2566}
2567
2568void
2569ev_async_stop (EV_P_ ev_async *w)
2570{
2571 clear_pending (EV_A_ (W)w);
2572 if (expect_false (!ev_is_active (w)))
2573 return;
2574
2575 {
2576 int active = ev_active (w);
2577
2578 asyncs [active - 1] = asyncs [--asynccnt];
2579 ev_active (asyncs [active - 1]) = active;
2580 }
2581
2582 ev_stop (EV_A_ (W)w);
2583}
2584
2585void
2586ev_async_send (EV_P_ ev_async *w)
2587{
2588 w->sent = 1;
2589 evpipe_write (EV_A_ &gotasync);
2590}
2591#endif
2592
1293/*****************************************************************************/ 2593/*****************************************************************************/
1294 2594
1295struct ev_once 2595struct ev_once
1296{ 2596{
1297 struct ev_io io; 2597 ev_io io;
1298 struct ev_timer to; 2598 ev_timer to;
1299 void (*cb)(int revents, void *arg); 2599 void (*cb)(int revents, void *arg);
1300 void *arg; 2600 void *arg;
1301}; 2601};
1302 2602
1303static void 2603static void
… …
1306 void (*cb)(int revents, void *arg) = once->cb; 2606 void (*cb)(int revents, void *arg) = once->cb;
1307 void *arg = once->arg; 2607 void *arg = once->arg;
1308 2608
1309 ev_io_stop (EV_A_ &once->io); 2609 ev_io_stop (EV_A_ &once->io);
1310 ev_timer_stop (EV_A_ &once->to); 2610 ev_timer_stop (EV_A_ &once->to);
1311 free (once); 2611 ev_free (once);
1312 2612
1313 cb (revents, arg); 2613 cb (revents, arg);
1314} 2614}
1315 2615
1316static void 2616static void
1317once_cb_io (EV_P_ struct ev_io *w, int revents) 2617once_cb_io (EV_P_ ev_io *w, int revents)
1318{ 2618{
1319 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2619 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1320} 2620}
1321 2621
1322static void 2622static void
1323once_cb_to (EV_P_ struct ev_timer *w, int revents) 2623once_cb_to (EV_P_ ev_timer *w, int revents)
1324{ 2624{
1325 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2625 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1326} 2626}
1327 2627
1328void 2628void
1329ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2629ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1330{ 2630{
1331 struct ev_once *once = malloc (sizeof (struct ev_once)); 2631 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1332 2632
1333 if (!once) 2633 if (expect_false (!once))
2634 {
1334 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 2635 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1335 else 2636 return;
1336 { 2637 }
2638
1337 once->cb = cb; 2639 once->cb = cb;
1338 once->arg = arg; 2640 once->arg = arg;
1339 2641
1340 ev_watcher_init (&once->io, once_cb_io); 2642 ev_init (&once->io, once_cb_io);
1341 if (fd >= 0) 2643 if (fd >= 0)
1342 { 2644 {
1343 ev_io_set (&once->io, fd, events); 2645 ev_io_set (&once->io, fd, events);
1344 ev_io_start (EV_A_ &once->io); 2646 ev_io_start (EV_A_ &once->io);
1345 } 2647 }
1346 2648
1347 ev_watcher_init (&once->to, once_cb_to); 2649 ev_init (&once->to, once_cb_to);
1348 if (timeout >= 0.) 2650 if (timeout >= 0.)
1349 { 2651 {
1350 ev_timer_set (&once->to, timeout, 0.); 2652 ev_timer_set (&once->to, timeout, 0.);
1351 ev_timer_start (EV_A_ &once->to); 2653 ev_timer_start (EV_A_ &once->to);
1352 }
1353 } 2654 }
1354} 2655}
1355 2656
2657#if EV_MULTIPLICITY
2658 #include "ev_wrap.h"
2659#endif
2660
2661#ifdef __cplusplus
2662}
2663#endif
2664

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