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Comparing libev/ev.c (file contents):
Revision 1.60 by root, Sun Nov 4 18:29:44 2007 UTC vs.
Revision 1.238 by root, Thu May 8 20:49:12 2008 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
31#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
32# include "config.h" 49# include "config.h"
50# endif
33 51
34# if HAVE_CLOCK_GETTIME 52# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC
35# define EV_USE_MONOTONIC 1 54# define EV_USE_MONOTONIC 1
55# endif
56# ifndef EV_USE_REALTIME
36# define EV_USE_REALTIME 1 57# define EV_USE_REALTIME 1
58# endif
59# else
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0
62# endif
63# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0
65# endif
37# endif 66# endif
38 67
39# if HAVE_SELECT && HAVE_SYS_SELECT_H 68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
40# define EV_USE_SELECT 1 70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
73# endif
41# endif 74# endif
42 75
43# if HAVE_POLL && HAVE_POLL_H 76# ifndef EV_USE_SELECT
77# if HAVE_SELECT && HAVE_SYS_SELECT_H
44# define EV_USE_POLL 1 78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif
45# endif 82# endif
46 83
47# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
48# define EV_USE_EPOLL 1 86# define EV_USE_POLL 1
87# else
88# define EV_USE_POLL 0
89# endif
49# endif 90# endif
50 91
51# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
52# define EV_USE_KQUEUE 1 94# define EV_USE_EPOLL 1
95# else
96# define EV_USE_EPOLL 0
97# endif
53# endif 98# endif
99
100# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif
106# endif
107
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1
111# else
112# define EV_USE_PORT 0
113# endif
114# endif
54 115
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1
119# else
120# define EV_USE_INOTIFY 0
121# endif
122# endif
123
124# ifndef EV_USE_EVENTFD
125# if HAVE_EVENTFD
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif
130# endif
131
55#endif 132#endif
56 133
57#include <math.h> 134#include <math.h>
58#include <stdlib.h> 135#include <stdlib.h>
59#include <unistd.h>
60#include <fcntl.h> 136#include <fcntl.h>
61#include <signal.h>
62#include <stddef.h> 137#include <stddef.h>
63 138
64#include <stdio.h> 139#include <stdio.h>
65 140
66#include <assert.h> 141#include <assert.h>
67#include <errno.h> 142#include <errno.h>
68#include <sys/types.h> 143#include <sys/types.h>
144#include <time.h>
145
146#include <signal.h>
147
148#ifdef EV_H
149# include EV_H
150#else
151# include "ev.h"
152#endif
153
69#ifndef WIN32 154#ifndef _WIN32
155# include <sys/time.h>
70# include <sys/wait.h> 156# include <sys/wait.h>
157# include <unistd.h>
158#else
159# define WIN32_LEAN_AND_MEAN
160# include <windows.h>
161# ifndef EV_SELECT_IS_WINSOCKET
162# define EV_SELECT_IS_WINSOCKET 1
71#endif 163# endif
72#include <sys/time.h> 164#endif
73#include <time.h>
74 165
75/**/ 166/* this block tries to deduce configuration from header-defined symbols and defaults */
76 167
77#ifndef EV_USE_MONOTONIC 168#ifndef EV_USE_MONOTONIC
78# 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
79#endif 178#endif
80 179
81#ifndef EV_USE_SELECT 180#ifndef EV_USE_SELECT
82# define EV_USE_SELECT 1 181# define EV_USE_SELECT 1
83#endif 182#endif
84 183
85#ifndef EV_USE_POLL 184#ifndef EV_USE_POLL
86# define EV_USE_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
87#endif 190#endif
88 191
89#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
90# define EV_USE_EPOLL 0 196# define EV_USE_EPOLL 0
197# endif
91#endif 198#endif
92 199
93#ifndef EV_USE_KQUEUE 200#ifndef EV_USE_KQUEUE
94# define EV_USE_KQUEUE 0 201# define EV_USE_KQUEUE 0
95#endif 202#endif
96 203
97#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))
98# define EV_USE_REALTIME 1 210# define EV_USE_INOTIFY 1
211# else
212# define EV_USE_INOTIFY 0
99#endif 213# endif
214#endif
100 215
101/**/ 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 */
102 241
103#ifndef CLOCK_MONOTONIC 242#ifndef CLOCK_MONOTONIC
104# undef EV_USE_MONOTONIC 243# undef EV_USE_MONOTONIC
105# define EV_USE_MONOTONIC 0 244# define EV_USE_MONOTONIC 0
106#endif 245#endif
… …
108#ifndef CLOCK_REALTIME 247#ifndef CLOCK_REALTIME
109# undef EV_USE_REALTIME 248# undef EV_USE_REALTIME
110# define EV_USE_REALTIME 0 249# define EV_USE_REALTIME 0
111#endif 250#endif
112 251
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
113/**/ 283/**/
114 284
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
115#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) */
116#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) */
117#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
118/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */ 297/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
119 298
120#include "ev.h"
121
122#if __GNUC__ >= 3 299#if __GNUC__ >= 4
123# define expect(expr,value) __builtin_expect ((expr),(value)) 300# define expect(expr,value) __builtin_expect ((expr),(value))
124# define inline inline 301# define noinline __attribute__ ((noinline))
125#else 302#else
126# define expect(expr,value) (expr) 303# define expect(expr,value) (expr)
127# define inline static 304# define noinline
305# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
306# define inline
307# endif
128#endif 308#endif
129 309
130#define expect_false(expr) expect ((expr) != 0, 0) 310#define expect_false(expr) expect ((expr) != 0, 0)
131#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
132 319
133#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 320#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
134#define ABSPRI(w) ((w)->priority - EV_MINPRI) 321#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
135 322
323#define EMPTY /* required for microsofts broken pseudo-c compiler */
324#define EMPTY2(a,b) /* used to suppress some warnings */
325
136typedef struct ev_watcher *W; 326typedef ev_watcher *W;
137typedef struct ev_watcher_list *WL; 327typedef ev_watcher_list *WL;
138typedef struct ev_watcher_time *WT; 328typedef ev_watcher_time *WT;
139 329
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 */
140static 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
141 342
142/*****************************************************************************/ 343/*****************************************************************************/
143 344
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
144typedef struct 410typedef struct
145{ 411{
146 struct ev_watcher_list *head; 412 WL head;
147 unsigned char events; 413 unsigned char events;
148 unsigned char reify; 414 unsigned char reify;
415#if EV_SELECT_IS_WINSOCKET
416 SOCKET handle;
417#endif
149} ANFD; 418} ANFD;
150 419
151typedef struct 420typedef struct
152{ 421{
153 W w; 422 W w;
154 int events; 423 int events;
155} ANPENDING; 424} ANPENDING;
156 425
426#if EV_USE_INOTIFY
427typedef struct
428{
429 WL head;
430} ANFS;
431#endif
432
157#if EV_MULTIPLICITY 433#if EV_MULTIPLICITY
158 434
159struct ev_loop 435 struct ev_loop
160{ 436 {
437 ev_tstamp ev_rt_now;
438 #define ev_rt_now ((loop)->ev_rt_now)
161# define VAR(name,decl) decl; 439 #define VAR(name,decl) decl;
162# include "ev_vars.h" 440 #include "ev_vars.h"
163};
164# undef VAR 441 #undef VAR
442 };
165# 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;
166 447
167#else 448#else
168 449
450 ev_tstamp ev_rt_now;
169# define VAR(name,decl) static decl; 451 #define VAR(name,decl) static decl;
170# include "ev_vars.h" 452 #include "ev_vars.h"
171# undef VAR 453 #undef VAR
454
455 static int ev_default_loop_ptr;
172 456
173#endif 457#endif
174 458
175/*****************************************************************************/ 459/*****************************************************************************/
176 460
177inline ev_tstamp 461ev_tstamp
178ev_time (void) 462ev_time (void)
179{ 463{
180#if EV_USE_REALTIME 464#if EV_USE_REALTIME
181 struct timespec ts; 465 struct timespec ts;
182 clock_gettime (CLOCK_REALTIME, &ts); 466 clock_gettime (CLOCK_REALTIME, &ts);
… …
186 gettimeofday (&tv, 0); 470 gettimeofday (&tv, 0);
187 return tv.tv_sec + tv.tv_usec * 1e-6; 471 return tv.tv_sec + tv.tv_usec * 1e-6;
188#endif 472#endif
189} 473}
190 474
191inline ev_tstamp 475ev_tstamp inline_size
192get_clock (void) 476get_clock (void)
193{ 477{
194#if EV_USE_MONOTONIC 478#if EV_USE_MONOTONIC
195 if (expect_true (have_monotonic)) 479 if (expect_true (have_monotonic))
196 { 480 {
… …
201#endif 485#endif
202 486
203 return ev_time (); 487 return ev_time ();
204} 488}
205 489
490#if EV_MULTIPLICITY
206ev_tstamp 491ev_tstamp
207ev_now (EV_P) 492ev_now (EV_P)
208{ 493{
209 return rt_now; 494 return ev_rt_now;
210} 495}
496#endif
211 497
212#define array_roundsize(base,n) ((n) | 4 & ~3) 498void
213 499ev_sleep (ev_tstamp delay)
214#define array_needsize(base,cur,cnt,init) \ 500{
215 if (expect_false ((cnt) > cur)) \ 501 if (delay > 0.)
216 { \
217 int newcnt = cur; \
218 do \
219 { \
220 newcnt = array_roundsize (base, newcnt << 1); \
221 } \
222 while ((cnt) > newcnt); \
223 \
224 base = realloc (base, sizeof (*base) * (newcnt)); \
225 init (base + cur, newcnt - cur); \
226 cur = newcnt; \
227 } 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}
228 522
229/*****************************************************************************/ 523/*****************************************************************************/
230 524
231static 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
232anfds_init (ANFD *base, int count) 608anfds_init (ANFD *base, int count)
233{ 609{
234 while (count--) 610 while (count--)
235 { 611 {
236 base->head = 0; 612 base->head = 0;
… …
239 615
240 ++base; 616 ++base;
241 } 617 }
242} 618}
243 619
244static void 620void inline_speed
245event (EV_P_ W w, int events)
246{
247 if (w->pending)
248 {
249 pendings [ABSPRI (w)][w->pending - 1].events |= events;
250 return;
251 }
252
253 w->pending = ++pendingcnt [ABSPRI (w)];
254 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
255 pendings [ABSPRI (w)][w->pending - 1].w = w;
256 pendings [ABSPRI (w)][w->pending - 1].events = events;
257}
258
259static void
260queue_events (EV_P_ W *events, int eventcnt, int type)
261{
262 int i;
263
264 for (i = 0; i < eventcnt; ++i)
265 event (EV_A_ events [i], type);
266}
267
268static void
269fd_event (EV_P_ int fd, int events) 621fd_event (EV_P_ int fd, int revents)
270{ 622{
271 ANFD *anfd = anfds + fd; 623 ANFD *anfd = anfds + fd;
272 struct ev_io *w; 624 ev_io *w;
273 625
274 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)
275 { 627 {
276 int ev = w->events & events; 628 int ev = w->events & revents;
277 629
278 if (ev) 630 if (ev)
279 event (EV_A_ (W)w, ev); 631 ev_feed_event (EV_A_ (W)w, ev);
280 } 632 }
281} 633}
282 634
283/*****************************************************************************/ 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}
284 641
285static void 642void inline_size
286fd_reify (EV_P) 643fd_reify (EV_P)
287{ 644{
288 int i; 645 int i;
289 646
290 for (i = 0; i < fdchangecnt; ++i) 647 for (i = 0; i < fdchangecnt; ++i)
291 { 648 {
292 int fd = fdchanges [i]; 649 int fd = fdchanges [i];
293 ANFD *anfd = anfds + fd; 650 ANFD *anfd = anfds + fd;
294 struct ev_io *w; 651 ev_io *w;
295 652
296 int events = 0; 653 unsigned char events = 0;
297 654
298 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)
299 events |= w->events; 656 events |= (unsigned char)w->events;
300 657
301 anfd->reify = 0; 658#if EV_SELECT_IS_WINSOCKET
302 659 if (events)
303 if (anfd->events != events)
304 { 660 {
305 method_modify (EV_A_ fd, anfd->events, events); 661 unsigned long argp;
306 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));
307 } 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 }
308 } 681 }
309 682
310 fdchangecnt = 0; 683 fdchangecnt = 0;
311} 684}
312 685
313static void 686void inline_size
314fd_change (EV_P_ int fd) 687fd_change (EV_P_ int fd, int flags)
315{ 688{
316 if (anfds [fd].reify || fdchangecnt < 0) 689 unsigned char reify = anfds [fd].reify;
317 return;
318
319 anfds [fd].reify = 1; 690 anfds [fd].reify |= flags;
320 691
692 if (expect_true (!reify))
693 {
321 ++fdchangecnt; 694 ++fdchangecnt;
322 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 695 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
323 fdchanges [fdchangecnt - 1] = fd; 696 fdchanges [fdchangecnt - 1] = fd;
697 }
324} 698}
325 699
326static void 700void inline_speed
327fd_kill (EV_P_ int fd) 701fd_kill (EV_P_ int fd)
328{ 702{
329 struct ev_io *w; 703 ev_io *w;
330 704
331 while ((w = (struct ev_io *)anfds [fd].head)) 705 while ((w = (ev_io *)anfds [fd].head))
332 { 706 {
333 ev_io_stop (EV_A_ w); 707 ev_io_stop (EV_A_ w);
334 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);
335 } 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
336} 720}
337 721
338/* called on EBADF to verify fds */ 722/* called on EBADF to verify fds */
339static void 723static void noinline
340fd_ebadf (EV_P) 724fd_ebadf (EV_P)
341{ 725{
342 int fd; 726 int fd;
343 727
344 for (fd = 0; fd < anfdmax; ++fd) 728 for (fd = 0; fd < anfdmax; ++fd)
345 if (anfds [fd].events) 729 if (anfds [fd].events)
346 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 730 if (!fd_valid (fd) == -1 && errno == EBADF)
347 fd_kill (EV_A_ fd); 731 fd_kill (EV_A_ fd);
348} 732}
349 733
350/* 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 */
351static void 735static void noinline
352fd_enomem (EV_P) 736fd_enomem (EV_P)
353{ 737{
354 int fd = anfdmax; 738 int fd;
355 739
356 while (fd--) 740 for (fd = anfdmax; fd--; )
357 if (anfds [fd].events) 741 if (anfds [fd].events)
358 { 742 {
359 close (fd);
360 fd_kill (EV_A_ fd); 743 fd_kill (EV_A_ fd);
361 return; 744 return;
362 } 745 }
363} 746}
364 747
365/* 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 */
366static void 749static void noinline
367fd_rearm_all (EV_P) 750fd_rearm_all (EV_P)
368{ 751{
369 int fd; 752 int fd;
370 753
371 /* this should be highly optimised to not do anything but set a flag */
372 for (fd = 0; fd < anfdmax; ++fd) 754 for (fd = 0; fd < anfdmax; ++fd)
373 if (anfds [fd].events) 755 if (anfds [fd].events)
374 { 756 {
375 anfds [fd].events = 0; 757 anfds [fd].events = 0;
376 fd_change (EV_A_ fd); 758 fd_change (EV_A_ fd, EV_IOFDSET | 1);
377 } 759 }
378} 760}
379 761
380/*****************************************************************************/ 762/*****************************************************************************/
381 763
382static 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#define USE_4HEAP 1/* they do not work corretcly */
772#if USE_4HEAP
773
774#define DHEAP 4
775#define HEAP0 (DHEAP - 1) /* index of first element in heap */
776
777/* towards the root */
778void inline_speed
383upheap (WT *heap, int k) 779upheap (WT *heap, int k)
384{ 780{
385 WT w = heap [k]; 781 WT w = heap [k];
386 782
387 while (k && heap [k >> 1]->at > w->at) 783 for (;;)
388 { 784 {
785 int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
786
787 if (p == k || heap [p]->at <= w->at)
788 break;
789
389 heap [k] = heap [k >> 1]; 790 heap [k] = heap [p];
390 heap [k]->active = k + 1; 791 ev_active (heap [k]) = k;
391 k >>= 1; 792 k = p;
392 } 793 }
393 794
394 heap [k] = w; 795 heap [k] = w;
395 heap [k]->active = k + 1; 796 ev_active (heap [k]) = k;
396
397} 797}
398 798
399static void 799/* away from the root */
800void inline_speed
400downheap (WT *heap, int N, int k) 801downheap (WT *heap, int N, int k)
401{ 802{
402 WT w = heap [k]; 803 WT w = heap [k];
804 WT *E = heap + N + HEAP0;
403 805
404 while (k < (N >> 1)) 806 for (;;)
405 { 807 {
406 int j = k << 1; 808 ev_tstamp minat;
809 WT *minpos;
810 WT *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
407 811
408 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 812 // find minimum child
813 if (expect_true (pos + DHEAP - 1 < E))
409 ++j; 814 {
815 /* fast path */
816 (minpos = pos + 0), (minat = (*minpos)->at);
817 if (pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
818 if (pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
819 if (pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
820 }
821 else
822 {
823 /* slow path */
824 if (pos >= E)
825 break;
826 (minpos = pos + 0), (minat = (*minpos)->at);
827 if (pos + 1 < E && pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
828 if (pos + 2 < E && pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
829 if (pos + 3 < E && pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
830 }
410 831
411 if (w->at <= heap [j]->at) 832 if (w->at <= minat)
412 break; 833 break;
413 834
414 heap [k] = heap [j]; 835 ev_active (*minpos) = k;
415 heap [k]->active = k + 1; 836 heap [k] = *minpos;
416 k = j; 837
838 k = minpos - heap;
417 } 839 }
418 840
419 heap [k] = w; 841 heap [k] = w;
842 ev_active (heap [k]) = k;
843}
844
845#else // 4HEAP
846
847#define HEAP0 1
848
849/* towards the root */
850void inline_speed
851upheap (WT *heap, int k)
852{
853 WT w = heap [k];
854
855 for (;;)
856 {
857 int p = k >> 1;
858
859 /* maybe we could use a dummy element at heap [0]? */
860 if (!p || heap [p]->at <= w->at)
861 break;
862
863 heap [k] = heap [p];
864 ev_active (heap [k]) = k;
865 k = p;
866 }
867
868 heap [k] = w;
869 ev_active (heap [k]) = k;
870}
871
872/* away from the root */
873void inline_speed
874downheap (WT *heap, int N, int k)
875{
876 WT w = heap [k];
877
878 for (;;)
879 {
880 int c = k << 1;
881
882 if (c > N)
883 break;
884
885 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
886 ? 1 : 0;
887
888 if (w->at <= heap [c]->at)
889 break;
890
891 heap [k] = heap [c];
420 heap [k]->active = k + 1; 892 ((W)heap [k])->active = k;
893
894 k = c;
895 }
896
897 heap [k] = w;
898 ev_active (heap [k]) = k;
899}
900#endif
901
902void inline_size
903adjustheap (WT *heap, int N, int k)
904{
905 upheap (heap, k);
906 downheap (heap, N, k);
421} 907}
422 908
423/*****************************************************************************/ 909/*****************************************************************************/
424 910
425typedef struct 911typedef struct
426{ 912{
427 struct ev_watcher_list *head; 913 WL head;
428 sig_atomic_t volatile gotsig; 914 EV_ATOMIC_T gotsig;
429} ANSIG; 915} ANSIG;
430 916
431static ANSIG *signals; 917static ANSIG *signals;
432static int signalmax; 918static int signalmax;
433 919
434static int sigpipe [2]; 920static EV_ATOMIC_T gotsig;
435static sig_atomic_t volatile gotsig;
436static struct ev_io sigev;
437 921
438static void 922void inline_size
439signals_init (ANSIG *base, int count) 923signals_init (ANSIG *base, int count)
440{ 924{
441 while (count--) 925 while (count--)
442 { 926 {
443 base->head = 0; 927 base->head = 0;
… …
445 929
446 ++base; 930 ++base;
447 } 931 }
448} 932}
449 933
934/*****************************************************************************/
935
936void inline_speed
937fd_intern (int fd)
938{
939#ifdef _WIN32
940 int arg = 1;
941 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
942#else
943 fcntl (fd, F_SETFD, FD_CLOEXEC);
944 fcntl (fd, F_SETFL, O_NONBLOCK);
945#endif
946}
947
948static void noinline
949evpipe_init (EV_P)
950{
951 if (!ev_is_active (&pipeev))
952 {
953#if EV_USE_EVENTFD
954 if ((evfd = eventfd (0, 0)) >= 0)
955 {
956 evpipe [0] = -1;
957 fd_intern (evfd);
958 ev_io_set (&pipeev, evfd, EV_READ);
959 }
960 else
961#endif
962 {
963 while (pipe (evpipe))
964 syserr ("(libev) error creating signal/async pipe");
965
966 fd_intern (evpipe [0]);
967 fd_intern (evpipe [1]);
968 ev_io_set (&pipeev, evpipe [0], EV_READ);
969 }
970
971 ev_io_start (EV_A_ &pipeev);
972 ev_unref (EV_A); /* watcher should not keep loop alive */
973 }
974}
975
976void inline_size
977evpipe_write (EV_P_ EV_ATOMIC_T *flag)
978{
979 if (!*flag)
980 {
981 int old_errno = errno; /* save errno because write might clobber it */
982
983 *flag = 1;
984
985#if EV_USE_EVENTFD
986 if (evfd >= 0)
987 {
988 uint64_t counter = 1;
989 write (evfd, &counter, sizeof (uint64_t));
990 }
991 else
992#endif
993 write (evpipe [1], &old_errno, 1);
994
995 errno = old_errno;
996 }
997}
998
450static void 999static void
1000pipecb (EV_P_ ev_io *iow, int revents)
1001{
1002#if EV_USE_EVENTFD
1003 if (evfd >= 0)
1004 {
1005 uint64_t counter;
1006 read (evfd, &counter, sizeof (uint64_t));
1007 }
1008 else
1009#endif
1010 {
1011 char dummy;
1012 read (evpipe [0], &dummy, 1);
1013 }
1014
1015 if (gotsig && ev_is_default_loop (EV_A))
1016 {
1017 int signum;
1018 gotsig = 0;
1019
1020 for (signum = signalmax; signum--; )
1021 if (signals [signum].gotsig)
1022 ev_feed_signal_event (EV_A_ signum + 1);
1023 }
1024
1025#if EV_ASYNC_ENABLE
1026 if (gotasync)
1027 {
1028 int i;
1029 gotasync = 0;
1030
1031 for (i = asynccnt; i--; )
1032 if (asyncs [i]->sent)
1033 {
1034 asyncs [i]->sent = 0;
1035 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1036 }
1037 }
1038#endif
1039}
1040
1041/*****************************************************************************/
1042
1043static void
451sighandler (int signum) 1044ev_sighandler (int signum)
452{ 1045{
1046#if EV_MULTIPLICITY
1047 struct ev_loop *loop = &default_loop_struct;
1048#endif
1049
1050#if _WIN32
1051 signal (signum, ev_sighandler);
1052#endif
1053
453 signals [signum - 1].gotsig = 1; 1054 signals [signum - 1].gotsig = 1;
454 1055 evpipe_write (EV_A_ &gotsig);
455 if (!gotsig)
456 {
457 int old_errno = errno;
458 gotsig = 1;
459 write (sigpipe [1], &signum, 1);
460 errno = old_errno;
461 }
462} 1056}
463 1057
464static void 1058void noinline
465sigcb (EV_P_ struct ev_io *iow, int revents) 1059ev_feed_signal_event (EV_P_ int signum)
466{ 1060{
467 struct ev_watcher_list *w; 1061 WL w;
1062
1063#if EV_MULTIPLICITY
1064 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1065#endif
1066
468 int signum; 1067 --signum;
469 1068
470 read (sigpipe [0], &revents, 1); 1069 if (signum < 0 || signum >= signalmax)
471 gotsig = 0; 1070 return;
472 1071
473 for (signum = signalmax; signum--; )
474 if (signals [signum].gotsig)
475 {
476 signals [signum].gotsig = 0; 1072 signals [signum].gotsig = 0;
477 1073
478 for (w = signals [signum].head; w; w = w->next) 1074 for (w = signals [signum].head; w; w = w->next)
479 event (EV_A_ (W)w, EV_SIGNAL); 1075 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
480 }
481}
482
483static void
484siginit (EV_P)
485{
486#ifndef WIN32
487 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
488 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
489
490 /* rather than sort out wether we really need nb, set it */
491 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
492 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
493#endif
494
495 ev_io_set (&sigev, sigpipe [0], EV_READ);
496 ev_io_start (EV_A_ &sigev);
497 ev_unref (EV_A); /* child watcher should not keep loop alive */
498} 1076}
499 1077
500/*****************************************************************************/ 1078/*****************************************************************************/
501 1079
1080static WL childs [EV_PID_HASHSIZE];
1081
502#ifndef WIN32 1082#ifndef _WIN32
503 1083
504static struct ev_child *childs [PID_HASHSIZE];
505static struct ev_signal childev; 1084static ev_signal childev;
1085
1086#ifndef WIFCONTINUED
1087# define WIFCONTINUED(status) 0
1088#endif
1089
1090void inline_speed
1091child_reap (EV_P_ int chain, int pid, int status)
1092{
1093 ev_child *w;
1094 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1095
1096 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1097 {
1098 if ((w->pid == pid || !w->pid)
1099 && (!traced || (w->flags & 1)))
1100 {
1101 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1102 w->rpid = pid;
1103 w->rstatus = status;
1104 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1105 }
1106 }
1107}
506 1108
507#ifndef WCONTINUED 1109#ifndef WCONTINUED
508# define WCONTINUED 0 1110# define WCONTINUED 0
509#endif 1111#endif
510 1112
511static void 1113static void
512child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
513{
514 struct ev_child *w;
515
516 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
517 if (w->pid == pid || !w->pid)
518 {
519 w->priority = sw->priority; /* need to do it *now* */
520 w->rpid = pid;
521 w->rstatus = status;
522 event (EV_A_ (W)w, EV_CHILD);
523 }
524}
525
526static void
527childcb (EV_P_ struct ev_signal *sw, int revents) 1114childcb (EV_P_ ev_signal *sw, int revents)
528{ 1115{
529 int pid, status; 1116 int pid, status;
530 1117
1118 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
531 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1119 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
532 { 1120 if (!WCONTINUED
1121 || errno != EINVAL
1122 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1123 return;
1124
533 /* make sure we are called again until all childs have been reaped */ 1125 /* make sure we are called again until all children have been reaped */
1126 /* we need to do it this way so that the callback gets called before we continue */
534 event (EV_A_ (W)sw, EV_SIGNAL); 1127 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
535 1128
536 child_reap (EV_A_ sw, pid, pid, status); 1129 child_reap (EV_A_ pid, pid, status);
1130 if (EV_PID_HASHSIZE > 1)
537 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1131 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
538 }
539} 1132}
540 1133
541#endif 1134#endif
542 1135
543/*****************************************************************************/ 1136/*****************************************************************************/
544 1137
1138#if EV_USE_PORT
1139# include "ev_port.c"
1140#endif
545#if EV_USE_KQUEUE 1141#if EV_USE_KQUEUE
546# include "ev_kqueue.c" 1142# include "ev_kqueue.c"
547#endif 1143#endif
548#if EV_USE_EPOLL 1144#if EV_USE_EPOLL
549# include "ev_epoll.c" 1145# include "ev_epoll.c"
… …
566{ 1162{
567 return EV_VERSION_MINOR; 1163 return EV_VERSION_MINOR;
568} 1164}
569 1165
570/* return true if we are running with elevated privileges and should ignore env variables */ 1166/* return true if we are running with elevated privileges and should ignore env variables */
571static int 1167int inline_size
572enable_secure (void) 1168enable_secure (void)
573{ 1169{
574#ifdef WIN32 1170#ifdef _WIN32
575 return 0; 1171 return 0;
576#else 1172#else
577 return getuid () != geteuid () 1173 return getuid () != geteuid ()
578 || getgid () != getegid (); 1174 || getgid () != getegid ();
579#endif 1175#endif
580} 1176}
581 1177
582int 1178unsigned int
583ev_method (EV_P) 1179ev_supported_backends (void)
584{ 1180{
585 return method; 1181 unsigned int flags = 0;
586}
587 1182
588static void 1183 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
589loop_init (EV_P_ int methods) 1184 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1185 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1186 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1187 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1188
1189 return flags;
1190}
1191
1192unsigned int
1193ev_recommended_backends (void)
590{ 1194{
591 if (!method) 1195 unsigned int flags = ev_supported_backends ();
1196
1197#ifndef __NetBSD__
1198 /* kqueue is borked on everything but netbsd apparently */
1199 /* it usually doesn't work correctly on anything but sockets and pipes */
1200 flags &= ~EVBACKEND_KQUEUE;
1201#endif
1202#ifdef __APPLE__
1203 // flags &= ~EVBACKEND_KQUEUE; for documentation
1204 flags &= ~EVBACKEND_POLL;
1205#endif
1206
1207 return flags;
1208}
1209
1210unsigned int
1211ev_embeddable_backends (void)
1212{
1213 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1214
1215 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1216 /* please fix it and tell me how to detect the fix */
1217 flags &= ~EVBACKEND_EPOLL;
1218
1219 return flags;
1220}
1221
1222unsigned int
1223ev_backend (EV_P)
1224{
1225 return backend;
1226}
1227
1228unsigned int
1229ev_loop_count (EV_P)
1230{
1231 return loop_count;
1232}
1233
1234void
1235ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1236{
1237 io_blocktime = interval;
1238}
1239
1240void
1241ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1242{
1243 timeout_blocktime = interval;
1244}
1245
1246static void noinline
1247loop_init (EV_P_ unsigned int flags)
1248{
1249 if (!backend)
592 { 1250 {
593#if EV_USE_MONOTONIC 1251#if EV_USE_MONOTONIC
594 { 1252 {
595 struct timespec ts; 1253 struct timespec ts;
596 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1254 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
597 have_monotonic = 1; 1255 have_monotonic = 1;
598 } 1256 }
599#endif 1257#endif
600 1258
601 rt_now = ev_time (); 1259 ev_rt_now = ev_time ();
602 mn_now = get_clock (); 1260 mn_now = get_clock ();
603 now_floor = mn_now; 1261 now_floor = mn_now;
604 rtmn_diff = rt_now - mn_now; 1262 rtmn_diff = ev_rt_now - mn_now;
605 1263
606 if (methods == EVMETHOD_AUTO) 1264 io_blocktime = 0.;
607 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1265 timeout_blocktime = 0.;
1266 backend = 0;
1267 backend_fd = -1;
1268 gotasync = 0;
1269#if EV_USE_INOTIFY
1270 fs_fd = -2;
1271#endif
1272
1273 /* pid check not overridable via env */
1274#ifndef _WIN32
1275 if (flags & EVFLAG_FORKCHECK)
1276 curpid = getpid ();
1277#endif
1278
1279 if (!(flags & EVFLAG_NOENV)
1280 && !enable_secure ()
1281 && getenv ("LIBEV_FLAGS"))
608 methods = atoi (getenv ("LIBEV_METHODS")); 1282 flags = atoi (getenv ("LIBEV_FLAGS"));
609 else
610 methods = EVMETHOD_ANY;
611 1283
612 method = 0; 1284 if (!(flags & 0x0000ffffU))
1285 flags |= ev_recommended_backends ();
1286
1287#if EV_USE_PORT
1288 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1289#endif
613#if EV_USE_KQUEUE 1290#if EV_USE_KQUEUE
614 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 1291 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
615#endif 1292#endif
616#if EV_USE_EPOLL 1293#if EV_USE_EPOLL
617 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 1294 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
618#endif 1295#endif
619#if EV_USE_POLL 1296#if EV_USE_POLL
620 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 1297 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
621#endif 1298#endif
622#if EV_USE_SELECT 1299#if EV_USE_SELECT
623 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 1300 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
624#endif 1301#endif
625 }
626}
627 1302
628void 1303 ev_init (&pipeev, pipecb);
1304 ev_set_priority (&pipeev, EV_MAXPRI);
1305 }
1306}
1307
1308static void noinline
629loop_destroy (EV_P) 1309loop_destroy (EV_P)
630{ 1310{
1311 int i;
1312
1313 if (ev_is_active (&pipeev))
1314 {
1315 ev_ref (EV_A); /* signal watcher */
1316 ev_io_stop (EV_A_ &pipeev);
1317
1318#if EV_USE_EVENTFD
1319 if (evfd >= 0)
1320 close (evfd);
1321#endif
1322
1323 if (evpipe [0] >= 0)
1324 {
1325 close (evpipe [0]);
1326 close (evpipe [1]);
1327 }
1328 }
1329
1330#if EV_USE_INOTIFY
1331 if (fs_fd >= 0)
1332 close (fs_fd);
1333#endif
1334
1335 if (backend_fd >= 0)
1336 close (backend_fd);
1337
1338#if EV_USE_PORT
1339 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1340#endif
631#if EV_USE_KQUEUE 1341#if EV_USE_KQUEUE
632 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1342 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
633#endif 1343#endif
634#if EV_USE_EPOLL 1344#if EV_USE_EPOLL
635 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1345 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
636#endif 1346#endif
637#if EV_USE_POLL 1347#if EV_USE_POLL
638 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1348 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
639#endif 1349#endif
640#if EV_USE_SELECT 1350#if EV_USE_SELECT
641 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1351 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
642#endif 1352#endif
643 1353
644 method = 0; 1354 for (i = NUMPRI; i--; )
645 /*TODO*/ 1355 {
646} 1356 array_free (pending, [i]);
1357#if EV_IDLE_ENABLE
1358 array_free (idle, [i]);
1359#endif
1360 }
647 1361
648void 1362 ev_free (anfds); anfdmax = 0;
1363
1364 /* have to use the microsoft-never-gets-it-right macro */
1365 array_free (fdchange, EMPTY);
1366 array_free (timer, EMPTY);
1367#if EV_PERIODIC_ENABLE
1368 array_free (periodic, EMPTY);
1369#endif
1370#if EV_FORK_ENABLE
1371 array_free (fork, EMPTY);
1372#endif
1373 array_free (prepare, EMPTY);
1374 array_free (check, EMPTY);
1375#if EV_ASYNC_ENABLE
1376 array_free (async, EMPTY);
1377#endif
1378
1379 backend = 0;
1380}
1381
1382#if EV_USE_INOTIFY
1383void inline_size infy_fork (EV_P);
1384#endif
1385
1386void inline_size
649loop_fork (EV_P) 1387loop_fork (EV_P)
650{ 1388{
651 /*TODO*/ 1389#if EV_USE_PORT
1390 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1391#endif
1392#if EV_USE_KQUEUE
1393 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1394#endif
652#if EV_USE_EPOLL 1395#if EV_USE_EPOLL
653 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1396 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
654#endif 1397#endif
655#if EV_USE_KQUEUE 1398#if EV_USE_INOTIFY
656 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 1399 infy_fork (EV_A);
657#endif 1400#endif
1401
1402 if (ev_is_active (&pipeev))
1403 {
1404 /* this "locks" the handlers against writing to the pipe */
1405 /* while we modify the fd vars */
1406 gotsig = 1;
1407#if EV_ASYNC_ENABLE
1408 gotasync = 1;
1409#endif
1410
1411 ev_ref (EV_A);
1412 ev_io_stop (EV_A_ &pipeev);
1413
1414#if EV_USE_EVENTFD
1415 if (evfd >= 0)
1416 close (evfd);
1417#endif
1418
1419 if (evpipe [0] >= 0)
1420 {
1421 close (evpipe [0]);
1422 close (evpipe [1]);
1423 }
1424
1425 evpipe_init (EV_A);
1426 /* now iterate over everything, in case we missed something */
1427 pipecb (EV_A_ &pipeev, EV_READ);
1428 }
1429
1430 postfork = 0;
658} 1431}
659 1432
660#if EV_MULTIPLICITY 1433#if EV_MULTIPLICITY
661struct ev_loop * 1434struct ev_loop *
662ev_loop_new (int methods) 1435ev_loop_new (unsigned int flags)
663{ 1436{
664 struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop)); 1437 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
665 1438
1439 memset (loop, 0, sizeof (struct ev_loop));
1440
666 loop_init (EV_A_ methods); 1441 loop_init (EV_A_ flags);
667 1442
668 if (ev_method (EV_A)) 1443 if (ev_backend (EV_A))
669 return loop; 1444 return loop;
670 1445
671 return 0; 1446 return 0;
672} 1447}
673 1448
674void 1449void
675ev_loop_destroy (EV_P) 1450ev_loop_destroy (EV_P)
676{ 1451{
677 loop_destroy (EV_A); 1452 loop_destroy (EV_A);
678 free (loop); 1453 ev_free (loop);
679} 1454}
680 1455
681void 1456void
682ev_loop_fork (EV_P) 1457ev_loop_fork (EV_P)
683{ 1458{
684 loop_fork (EV_A); 1459 postfork = 1; /* must be in line with ev_default_fork */
685} 1460}
686
687#endif 1461#endif
688 1462
689#if EV_MULTIPLICITY 1463#if EV_MULTIPLICITY
690struct ev_loop default_loop_struct;
691static struct ev_loop *default_loop;
692
693struct ev_loop * 1464struct ev_loop *
1465ev_default_loop_init (unsigned int flags)
694#else 1466#else
695static int default_loop;
696
697int 1467int
1468ev_default_loop (unsigned int flags)
698#endif 1469#endif
699ev_default_loop (int methods)
700{ 1470{
701 if (sigpipe [0] == sigpipe [1])
702 if (pipe (sigpipe))
703 return 0;
704
705 if (!default_loop) 1471 if (!ev_default_loop_ptr)
706 { 1472 {
707#if EV_MULTIPLICITY 1473#if EV_MULTIPLICITY
708 struct ev_loop *loop = default_loop = &default_loop_struct; 1474 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
709#else 1475#else
710 default_loop = 1; 1476 ev_default_loop_ptr = 1;
711#endif 1477#endif
712 1478
713 loop_init (EV_A_ methods); 1479 loop_init (EV_A_ flags);
714 1480
715 if (ev_method (EV_A)) 1481 if (ev_backend (EV_A))
716 { 1482 {
717 ev_watcher_init (&sigev, sigcb);
718 ev_set_priority (&sigev, EV_MAXPRI);
719 siginit (EV_A);
720
721#ifndef WIN32 1483#ifndef _WIN32
722 ev_signal_init (&childev, childcb, SIGCHLD); 1484 ev_signal_init (&childev, childcb, SIGCHLD);
723 ev_set_priority (&childev, EV_MAXPRI); 1485 ev_set_priority (&childev, EV_MAXPRI);
724 ev_signal_start (EV_A_ &childev); 1486 ev_signal_start (EV_A_ &childev);
725 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1487 ev_unref (EV_A); /* child watcher should not keep loop alive */
726#endif 1488#endif
727 } 1489 }
728 else 1490 else
729 default_loop = 0; 1491 ev_default_loop_ptr = 0;
730 } 1492 }
731 1493
732 return default_loop; 1494 return ev_default_loop_ptr;
733} 1495}
734 1496
735void 1497void
736ev_default_destroy (void) 1498ev_default_destroy (void)
737{ 1499{
738#if EV_MULTIPLICITY 1500#if EV_MULTIPLICITY
739 struct ev_loop *loop = default_loop; 1501 struct ev_loop *loop = ev_default_loop_ptr;
740#endif 1502#endif
741 1503
1504#ifndef _WIN32
742 ev_ref (EV_A); /* child watcher */ 1505 ev_ref (EV_A); /* child watcher */
743 ev_signal_stop (EV_A_ &childev); 1506 ev_signal_stop (EV_A_ &childev);
744 1507#endif
745 ev_ref (EV_A); /* signal watcher */
746 ev_io_stop (EV_A_ &sigev);
747
748 close (sigpipe [0]); sigpipe [0] = 0;
749 close (sigpipe [1]); sigpipe [1] = 0;
750 1508
751 loop_destroy (EV_A); 1509 loop_destroy (EV_A);
752} 1510}
753 1511
754void 1512void
755ev_default_fork (void) 1513ev_default_fork (void)
756{ 1514{
757#if EV_MULTIPLICITY 1515#if EV_MULTIPLICITY
758 struct ev_loop *loop = default_loop; 1516 struct ev_loop *loop = ev_default_loop_ptr;
759#endif 1517#endif
760 1518
761 loop_fork (EV_A); 1519 if (backend)
762 1520 postfork = 1; /* must be in line with ev_loop_fork */
763 ev_io_stop (EV_A_ &sigev);
764 close (sigpipe [0]);
765 close (sigpipe [1]);
766 pipe (sigpipe);
767
768 ev_ref (EV_A); /* signal watcher */
769 siginit (EV_A);
770} 1521}
771 1522
772/*****************************************************************************/ 1523/*****************************************************************************/
773 1524
774static void 1525void
1526ev_invoke (EV_P_ void *w, int revents)
1527{
1528 EV_CB_INVOKE ((W)w, revents);
1529}
1530
1531void inline_speed
775call_pending (EV_P) 1532call_pending (EV_P)
776{ 1533{
777 int pri; 1534 int pri;
778 1535
779 for (pri = NUMPRI; pri--; ) 1536 for (pri = NUMPRI; pri--; )
780 while (pendingcnt [pri]) 1537 while (pendingcnt [pri])
781 { 1538 {
782 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1539 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
783 1540
784 if (p->w) 1541 if (expect_true (p->w))
785 { 1542 {
1543 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1544
786 p->w->pending = 0; 1545 p->w->pending = 0;
787 p->w->cb (EV_A_ p->w, p->events); 1546 EV_CB_INVOKE (p->w, p->events);
788 } 1547 }
789 } 1548 }
790} 1549}
791 1550
792static void 1551#if EV_IDLE_ENABLE
1552void inline_size
1553idle_reify (EV_P)
1554{
1555 if (expect_false (idleall))
1556 {
1557 int pri;
1558
1559 for (pri = NUMPRI; pri--; )
1560 {
1561 if (pendingcnt [pri])
1562 break;
1563
1564 if (idlecnt [pri])
1565 {
1566 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1567 break;
1568 }
1569 }
1570 }
1571}
1572#endif
1573
1574void inline_size
793timers_reify (EV_P) 1575timers_reify (EV_P)
794{ 1576{
795 while (timercnt && timers [0]->at <= mn_now) 1577 while (timercnt && ev_at (timers [HEAP0]) <= mn_now)
796 { 1578 {
797 struct ev_timer *w = timers [0]; 1579 ev_timer *w = (ev_timer *)timers [HEAP0];
1580
1581 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
798 1582
799 /* first reschedule or stop timer */ 1583 /* first reschedule or stop timer */
800 if (w->repeat) 1584 if (w->repeat)
801 { 1585 {
802 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1586 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
803 w->at = mn_now + w->repeat; 1587
1588 ev_at (w) += w->repeat;
1589 if (ev_at (w) < mn_now)
1590 ev_at (w) = mn_now;
1591
804 downheap ((WT *)timers, timercnt, 0); 1592 downheap (timers, timercnt, HEAP0);
805 } 1593 }
806 else 1594 else
807 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1595 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
808 1596
809 event (EV_A_ (W)w, EV_TIMEOUT); 1597 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
810 } 1598 }
811} 1599}
812 1600
813static void 1601#if EV_PERIODIC_ENABLE
1602void inline_size
814periodics_reify (EV_P) 1603periodics_reify (EV_P)
815{ 1604{
816 while (periodiccnt && periodics [0]->at <= rt_now) 1605 while (periodiccnt && ev_at (periodics [HEAP0]) <= ev_rt_now)
817 { 1606 {
818 struct ev_periodic *w = periodics [0]; 1607 ev_periodic *w = (ev_periodic *)periodics [HEAP0];
1608
1609 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
819 1610
820 /* first reschedule or stop timer */ 1611 /* first reschedule or stop timer */
821 if (w->interval) 1612 if (w->reschedule_cb)
822 { 1613 {
1614 ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1615 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
1616 downheap (periodics, periodiccnt, 1);
1617 }
1618 else if (w->interval)
1619 {
823 w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval; 1620 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1621 if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
824 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now)); 1622 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
825 downheap ((WT *)periodics, periodiccnt, 0); 1623 downheap (periodics, periodiccnt, HEAP0);
826 } 1624 }
827 else 1625 else
828 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1626 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
829 1627
830 event (EV_A_ (W)w, EV_PERIODIC); 1628 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
831 } 1629 }
832} 1630}
833 1631
834static void 1632static void noinline
835periodics_reschedule (EV_P) 1633periodics_reschedule (EV_P)
836{ 1634{
837 int i; 1635 int i;
838 1636
839 /* adjust periodics after time jump */ 1637 /* adjust periodics after time jump */
840 for (i = 0; i < periodiccnt; ++i) 1638 for (i = 1; i <= periodiccnt; ++i)
841 { 1639 {
842 struct ev_periodic *w = periodics [i]; 1640 ev_periodic *w = (ev_periodic *)periodics [i];
843 1641
1642 if (w->reschedule_cb)
1643 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
844 if (w->interval) 1644 else if (w->interval)
845 {
846 ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval; 1645 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
847
848 if (fabs (diff) >= 1e-4)
849 {
850 ev_periodic_stop (EV_A_ w);
851 ev_periodic_start (EV_A_ w);
852
853 i = 0; /* restart loop, inefficient, but time jumps should be rare */
854 }
855 }
856 }
857}
858
859inline int
860time_update_monotonic (EV_P)
861{
862 mn_now = get_clock ();
863
864 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
865 { 1646 }
866 rt_now = rtmn_diff + mn_now;
867 return 0;
868 }
869 else
870 {
871 now_floor = mn_now;
872 rt_now = ev_time ();
873 return 1;
874 }
875}
876 1647
877static void 1648 /* now rebuild the heap */
878time_update (EV_P) 1649 for (i = periodiccnt >> 1; --i; )
1650 downheap (periodics, periodiccnt, i + HEAP0);
1651}
1652#endif
1653
1654void inline_speed
1655time_update (EV_P_ ev_tstamp max_block)
879{ 1656{
880 int i; 1657 int i;
881 1658
882#if EV_USE_MONOTONIC 1659#if EV_USE_MONOTONIC
883 if (expect_true (have_monotonic)) 1660 if (expect_true (have_monotonic))
884 { 1661 {
885 if (time_update_monotonic (EV_A)) 1662 ev_tstamp odiff = rtmn_diff;
1663
1664 mn_now = get_clock ();
1665
1666 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1667 /* interpolate in the meantime */
1668 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
886 { 1669 {
887 ev_tstamp odiff = rtmn_diff; 1670 ev_rt_now = rtmn_diff + mn_now;
1671 return;
1672 }
888 1673
1674 now_floor = mn_now;
1675 ev_rt_now = ev_time ();
1676
889 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1677 /* loop a few times, before making important decisions.
1678 * on the choice of "4": one iteration isn't enough,
1679 * in case we get preempted during the calls to
1680 * ev_time and get_clock. a second call is almost guaranteed
1681 * to succeed in that case, though. and looping a few more times
1682 * doesn't hurt either as we only do this on time-jumps or
1683 * in the unlikely event of having been preempted here.
1684 */
1685 for (i = 4; --i; )
890 { 1686 {
891 rtmn_diff = rt_now - mn_now; 1687 rtmn_diff = ev_rt_now - mn_now;
892 1688
893 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1689 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
894 return; /* all is well */ 1690 return; /* all is well */
895 1691
896 rt_now = ev_time (); 1692 ev_rt_now = ev_time ();
897 mn_now = get_clock (); 1693 mn_now = get_clock ();
898 now_floor = mn_now; 1694 now_floor = mn_now;
899 } 1695 }
900 1696
1697# if EV_PERIODIC_ENABLE
1698 periodics_reschedule (EV_A);
1699# endif
1700 /* no timer adjustment, as the monotonic clock doesn't jump */
1701 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1702 }
1703 else
1704#endif
1705 {
1706 ev_rt_now = ev_time ();
1707
1708 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1709 {
1710#if EV_PERIODIC_ENABLE
901 periodics_reschedule (EV_A); 1711 periodics_reschedule (EV_A);
902 /* no timer adjustment, as the monotonic clock doesn't jump */ 1712#endif
903 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */ 1713 /* adjust timers. this is easy, as the offset is the same for all of them */
1714 for (i = 1; i <= timercnt; ++i)
1715 ev_at (timers [i]) += ev_rt_now - mn_now;
904 } 1716 }
905 }
906 else
907#endif
908 {
909 rt_now = ev_time ();
910 1717
911 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
912 {
913 periodics_reschedule (EV_A);
914
915 /* adjust timers. this is easy, as the offset is the same for all */
916 for (i = 0; i < timercnt; ++i)
917 timers [i]->at += rt_now - mn_now;
918 }
919
920 mn_now = rt_now; 1718 mn_now = ev_rt_now;
921 } 1719 }
922} 1720}
923 1721
924void 1722void
925ev_ref (EV_P) 1723ev_ref (EV_P)
… …
936static int loop_done; 1734static int loop_done;
937 1735
938void 1736void
939ev_loop (EV_P_ int flags) 1737ev_loop (EV_P_ int flags)
940{ 1738{
941 double block; 1739 loop_done = EVUNLOOP_CANCEL;
942 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1740
1741 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
943 1742
944 do 1743 do
945 { 1744 {
1745#ifndef _WIN32
1746 if (expect_false (curpid)) /* penalise the forking check even more */
1747 if (expect_false (getpid () != curpid))
1748 {
1749 curpid = getpid ();
1750 postfork = 1;
1751 }
1752#endif
1753
1754#if EV_FORK_ENABLE
1755 /* we might have forked, so queue fork handlers */
1756 if (expect_false (postfork))
1757 if (forkcnt)
1758 {
1759 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1760 call_pending (EV_A);
1761 }
1762#endif
1763
946 /* queue check watchers (and execute them) */ 1764 /* queue prepare watchers (and execute them) */
947 if (expect_false (preparecnt)) 1765 if (expect_false (preparecnt))
948 { 1766 {
949 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1767 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
950 call_pending (EV_A); 1768 call_pending (EV_A);
951 } 1769 }
952 1770
1771 if (expect_false (!activecnt))
1772 break;
1773
1774 /* we might have forked, so reify kernel state if necessary */
1775 if (expect_false (postfork))
1776 loop_fork (EV_A);
1777
953 /* update fd-related kernel structures */ 1778 /* update fd-related kernel structures */
954 fd_reify (EV_A); 1779 fd_reify (EV_A);
955 1780
956 /* calculate blocking time */ 1781 /* calculate blocking time */
1782 {
1783 ev_tstamp waittime = 0.;
1784 ev_tstamp sleeptime = 0.;
957 1785
958 /* we only need this for !monotonic clockor timers, but as we basically 1786 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
959 always have timers, we just calculate it always */
960#if EV_USE_MONOTONIC
961 if (expect_true (have_monotonic))
962 time_update_monotonic (EV_A);
963 else
964#endif
965 { 1787 {
966 rt_now = ev_time (); 1788 /* update time to cancel out callback processing overhead */
967 mn_now = rt_now; 1789 time_update (EV_A_ 1e100);
968 }
969 1790
970 if (flags & EVLOOP_NONBLOCK || idlecnt)
971 block = 0.;
972 else
973 {
974 block = MAX_BLOCKTIME; 1791 waittime = MAX_BLOCKTIME;
975 1792
976 if (timercnt) 1793 if (timercnt)
977 { 1794 {
978 ev_tstamp to = timers [0]->at - mn_now + method_fudge; 1795 ev_tstamp to = ev_at (timers [HEAP0]) - mn_now + backend_fudge;
979 if (block > to) block = to; 1796 if (waittime > to) waittime = to;
980 } 1797 }
981 1798
1799#if EV_PERIODIC_ENABLE
982 if (periodiccnt) 1800 if (periodiccnt)
983 { 1801 {
984 ev_tstamp to = periodics [0]->at - rt_now + method_fudge; 1802 ev_tstamp to = ev_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
985 if (block > to) block = to; 1803 if (waittime > to) waittime = to;
986 } 1804 }
1805#endif
987 1806
988 if (block < 0.) block = 0.; 1807 if (expect_false (waittime < timeout_blocktime))
1808 waittime = timeout_blocktime;
1809
1810 sleeptime = waittime - backend_fudge;
1811
1812 if (expect_true (sleeptime > io_blocktime))
1813 sleeptime = io_blocktime;
1814
1815 if (sleeptime)
1816 {
1817 ev_sleep (sleeptime);
1818 waittime -= sleeptime;
1819 }
989 } 1820 }
990 1821
991 method_poll (EV_A_ block); 1822 ++loop_count;
1823 backend_poll (EV_A_ waittime);
992 1824
993 /* update rt_now, do magic */ 1825 /* update ev_rt_now, do magic */
994 time_update (EV_A); 1826 time_update (EV_A_ waittime + sleeptime);
1827 }
995 1828
996 /* queue pending timers and reschedule them */ 1829 /* queue pending timers and reschedule them */
997 timers_reify (EV_A); /* relative timers called last */ 1830 timers_reify (EV_A); /* relative timers called last */
1831#if EV_PERIODIC_ENABLE
998 periodics_reify (EV_A); /* absolute timers called first */ 1832 periodics_reify (EV_A); /* absolute timers called first */
1833#endif
999 1834
1835#if EV_IDLE_ENABLE
1000 /* queue idle watchers unless io or timers are pending */ 1836 /* queue idle watchers unless other events are pending */
1001 if (!pendingcnt) 1837 idle_reify (EV_A);
1002 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 1838#endif
1003 1839
1004 /* queue check watchers, to be executed first */ 1840 /* queue check watchers, to be executed first */
1005 if (checkcnt) 1841 if (expect_false (checkcnt))
1006 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 1842 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1007 1843
1008 call_pending (EV_A); 1844 call_pending (EV_A);
1009 } 1845 }
1010 while (activecnt && !loop_done); 1846 while (expect_true (
1847 activecnt
1848 && !loop_done
1849 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1850 ));
1011 1851
1012 if (loop_done != 2) 1852 if (loop_done == EVUNLOOP_ONE)
1013 loop_done = 0; 1853 loop_done = EVUNLOOP_CANCEL;
1014} 1854}
1015 1855
1016void 1856void
1017ev_unloop (EV_P_ int how) 1857ev_unloop (EV_P_ int how)
1018{ 1858{
1019 loop_done = how; 1859 loop_done = how;
1020} 1860}
1021 1861
1022/*****************************************************************************/ 1862/*****************************************************************************/
1023 1863
1024inline void 1864void inline_size
1025wlist_add (WL *head, WL elem) 1865wlist_add (WL *head, WL elem)
1026{ 1866{
1027 elem->next = *head; 1867 elem->next = *head;
1028 *head = elem; 1868 *head = elem;
1029} 1869}
1030 1870
1031inline void 1871void inline_size
1032wlist_del (WL *head, WL elem) 1872wlist_del (WL *head, WL elem)
1033{ 1873{
1034 while (*head) 1874 while (*head)
1035 { 1875 {
1036 if (*head == elem) 1876 if (*head == elem)
… …
1041 1881
1042 head = &(*head)->next; 1882 head = &(*head)->next;
1043 } 1883 }
1044} 1884}
1045 1885
1046inline void 1886void inline_speed
1047ev_clear_pending (EV_P_ W w) 1887clear_pending (EV_P_ W w)
1048{ 1888{
1049 if (w->pending) 1889 if (w->pending)
1050 { 1890 {
1051 pendings [ABSPRI (w)][w->pending - 1].w = 0; 1891 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1052 w->pending = 0; 1892 w->pending = 0;
1053 } 1893 }
1054} 1894}
1055 1895
1056inline void 1896int
1897ev_clear_pending (EV_P_ void *w)
1898{
1899 W w_ = (W)w;
1900 int pending = w_->pending;
1901
1902 if (expect_true (pending))
1903 {
1904 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1905 w_->pending = 0;
1906 p->w = 0;
1907 return p->events;
1908 }
1909 else
1910 return 0;
1911}
1912
1913void inline_size
1914pri_adjust (EV_P_ W w)
1915{
1916 int pri = w->priority;
1917 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1918 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1919 w->priority = pri;
1920}
1921
1922void inline_speed
1057ev_start (EV_P_ W w, int active) 1923ev_start (EV_P_ W w, int active)
1058{ 1924{
1059 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 1925 pri_adjust (EV_A_ w);
1060 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1061
1062 w->active = active; 1926 w->active = active;
1063 ev_ref (EV_A); 1927 ev_ref (EV_A);
1064} 1928}
1065 1929
1066inline void 1930void inline_size
1067ev_stop (EV_P_ W w) 1931ev_stop (EV_P_ W w)
1068{ 1932{
1069 ev_unref (EV_A); 1933 ev_unref (EV_A);
1070 w->active = 0; 1934 w->active = 0;
1071} 1935}
1072 1936
1073/*****************************************************************************/ 1937/*****************************************************************************/
1074 1938
1075void 1939void noinline
1076ev_io_start (EV_P_ struct ev_io *w) 1940ev_io_start (EV_P_ ev_io *w)
1077{ 1941{
1078 int fd = w->fd; 1942 int fd = w->fd;
1079 1943
1080 if (ev_is_active (w)) 1944 if (expect_false (ev_is_active (w)))
1081 return; 1945 return;
1082 1946
1083 assert (("ev_io_start called with negative fd", fd >= 0)); 1947 assert (("ev_io_start called with negative fd", fd >= 0));
1084 1948
1085 ev_start (EV_A_ (W)w, 1); 1949 ev_start (EV_A_ (W)w, 1);
1086 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1950 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1087 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1951 wlist_add (&anfds[fd].head, (WL)w);
1088 1952
1089 fd_change (EV_A_ fd); 1953 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1954 w->events &= ~EV_IOFDSET;
1090} 1955}
1091 1956
1092void 1957void noinline
1093ev_io_stop (EV_P_ struct ev_io *w) 1958ev_io_stop (EV_P_ ev_io *w)
1094{ 1959{
1095 ev_clear_pending (EV_A_ (W)w); 1960 clear_pending (EV_A_ (W)w);
1096 if (!ev_is_active (w)) 1961 if (expect_false (!ev_is_active (w)))
1097 return; 1962 return;
1098 1963
1964 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1965
1099 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1966 wlist_del (&anfds[w->fd].head, (WL)w);
1100 ev_stop (EV_A_ (W)w); 1967 ev_stop (EV_A_ (W)w);
1101 1968
1102 fd_change (EV_A_ w->fd); 1969 fd_change (EV_A_ w->fd, 1);
1103} 1970}
1104 1971
1105void 1972void noinline
1106ev_timer_start (EV_P_ struct ev_timer *w) 1973ev_timer_start (EV_P_ ev_timer *w)
1107{ 1974{
1108 if (ev_is_active (w)) 1975 if (expect_false (ev_is_active (w)))
1109 return; 1976 return;
1110 1977
1111 w->at += mn_now; 1978 ev_at (w) += mn_now;
1112 1979
1113 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 1980 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1114 1981
1115 ev_start (EV_A_ (W)w, ++timercnt); 1982 ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
1116 array_needsize (timers, timermax, timercnt, ); 1983 array_needsize (WT, timers, timermax, timercnt + HEAP0, EMPTY2);
1117 timers [timercnt - 1] = w; 1984 timers [ev_active (w)] = (WT)w;
1118 upheap ((WT *)timers, timercnt - 1); 1985 upheap (timers, ev_active (w));
1119}
1120 1986
1121void 1987 /*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
1988}
1989
1990void noinline
1122ev_timer_stop (EV_P_ struct ev_timer *w) 1991ev_timer_stop (EV_P_ ev_timer *w)
1123{ 1992{
1124 ev_clear_pending (EV_A_ (W)w); 1993 clear_pending (EV_A_ (W)w);
1125 if (!ev_is_active (w)) 1994 if (expect_false (!ev_is_active (w)))
1126 return; 1995 return;
1127 1996
1128 if (w->active < timercnt--) 1997 {
1998 int active = ev_active (w);
1999
2000 assert (("internal timer heap corruption", timers [active] == (WT)w));
2001
2002 if (expect_true (active < timercnt + HEAP0 - 1))
1129 { 2003 {
1130 timers [w->active - 1] = timers [timercnt]; 2004 timers [active] = timers [timercnt + HEAP0 - 1];
1131 downheap ((WT *)timers, timercnt, w->active - 1); 2005 adjustheap (timers, timercnt, active);
1132 } 2006 }
1133 2007
1134 w->at = w->repeat; 2008 --timercnt;
2009 }
2010
2011 ev_at (w) -= mn_now;
1135 2012
1136 ev_stop (EV_A_ (W)w); 2013 ev_stop (EV_A_ (W)w);
1137} 2014}
1138 2015
1139void 2016void noinline
1140ev_timer_again (EV_P_ struct ev_timer *w) 2017ev_timer_again (EV_P_ ev_timer *w)
1141{ 2018{
1142 if (ev_is_active (w)) 2019 if (ev_is_active (w))
1143 { 2020 {
1144 if (w->repeat) 2021 if (w->repeat)
1145 { 2022 {
1146 w->at = mn_now + w->repeat; 2023 ev_at (w) = mn_now + w->repeat;
1147 downheap ((WT *)timers, timercnt, w->active - 1); 2024 adjustheap (timers, timercnt, ev_active (w));
1148 } 2025 }
1149 else 2026 else
1150 ev_timer_stop (EV_A_ w); 2027 ev_timer_stop (EV_A_ w);
1151 } 2028 }
1152 else if (w->repeat) 2029 else if (w->repeat)
2030 {
2031 ev_at (w) = w->repeat;
1153 ev_timer_start (EV_A_ w); 2032 ev_timer_start (EV_A_ w);
2033 }
1154} 2034}
1155 2035
1156void 2036#if EV_PERIODIC_ENABLE
2037void noinline
1157ev_periodic_start (EV_P_ struct ev_periodic *w) 2038ev_periodic_start (EV_P_ ev_periodic *w)
1158{ 2039{
1159 if (ev_is_active (w)) 2040 if (expect_false (ev_is_active (w)))
1160 return; 2041 return;
1161 2042
2043 if (w->reschedule_cb)
2044 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2045 else if (w->interval)
2046 {
1162 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2047 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1163
1164 /* this formula differs from the one in periodic_reify because we do not always round up */ 2048 /* this formula differs from the one in periodic_reify because we do not always round up */
1165 if (w->interval)
1166 w->at += ceil ((rt_now - w->at) / w->interval) * w->interval; 2049 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2050 }
2051 else
2052 ev_at (w) = w->offset;
1167 2053
1168 ev_start (EV_A_ (W)w, ++periodiccnt); 2054 ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1169 array_needsize (periodics, periodicmax, periodiccnt, ); 2055 array_needsize (WT, periodics, periodicmax, periodiccnt + HEAP0, EMPTY2);
1170 periodics [periodiccnt - 1] = w; 2056 periodics [ev_active (w)] = (WT)w;
1171 upheap ((WT *)periodics, periodiccnt - 1); 2057 upheap (periodics, ev_active (w));
1172}
1173 2058
1174void 2059 /*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
2060}
2061
2062void noinline
1175ev_periodic_stop (EV_P_ struct ev_periodic *w) 2063ev_periodic_stop (EV_P_ ev_periodic *w)
1176{ 2064{
1177 ev_clear_pending (EV_A_ (W)w); 2065 clear_pending (EV_A_ (W)w);
1178 if (!ev_is_active (w)) 2066 if (expect_false (!ev_is_active (w)))
1179 return; 2067 return;
1180 2068
1181 if (w->active < periodiccnt--) 2069 {
2070 int active = ev_active (w);
2071
2072 assert (("internal periodic heap corruption", periodics [active] == (WT)w));
2073
2074 if (expect_true (active < periodiccnt + HEAP0 - 1))
1182 { 2075 {
1183 periodics [w->active - 1] = periodics [periodiccnt]; 2076 periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1184 downheap ((WT *)periodics, periodiccnt, w->active - 1); 2077 adjustheap (periodics, periodiccnt, active);
1185 } 2078 }
2079
2080 --periodiccnt;
2081 }
1186 2082
1187 ev_stop (EV_A_ (W)w); 2083 ev_stop (EV_A_ (W)w);
1188} 2084}
1189 2085
1190void 2086void noinline
1191ev_idle_start (EV_P_ struct ev_idle *w) 2087ev_periodic_again (EV_P_ ev_periodic *w)
1192{ 2088{
1193 if (ev_is_active (w)) 2089 /* TODO: use adjustheap and recalculation */
1194 return;
1195
1196 ev_start (EV_A_ (W)w, ++idlecnt);
1197 array_needsize (idles, idlemax, idlecnt, );
1198 idles [idlecnt - 1] = w;
1199}
1200
1201void
1202ev_idle_stop (EV_P_ struct ev_idle *w)
1203{
1204 ev_clear_pending (EV_A_ (W)w);
1205 if (ev_is_active (w))
1206 return;
1207
1208 idles [w->active - 1] = idles [--idlecnt];
1209 ev_stop (EV_A_ (W)w); 2090 ev_periodic_stop (EV_A_ w);
2091 ev_periodic_start (EV_A_ w);
1210} 2092}
1211 2093#endif
1212void
1213ev_prepare_start (EV_P_ struct ev_prepare *w)
1214{
1215 if (ev_is_active (w))
1216 return;
1217
1218 ev_start (EV_A_ (W)w, ++preparecnt);
1219 array_needsize (prepares, preparemax, preparecnt, );
1220 prepares [preparecnt - 1] = w;
1221}
1222
1223void
1224ev_prepare_stop (EV_P_ struct ev_prepare *w)
1225{
1226 ev_clear_pending (EV_A_ (W)w);
1227 if (ev_is_active (w))
1228 return;
1229
1230 prepares [w->active - 1] = prepares [--preparecnt];
1231 ev_stop (EV_A_ (W)w);
1232}
1233
1234void
1235ev_check_start (EV_P_ struct ev_check *w)
1236{
1237 if (ev_is_active (w))
1238 return;
1239
1240 ev_start (EV_A_ (W)w, ++checkcnt);
1241 array_needsize (checks, checkmax, checkcnt, );
1242 checks [checkcnt - 1] = w;
1243}
1244
1245void
1246ev_check_stop (EV_P_ struct ev_check *w)
1247{
1248 ev_clear_pending (EV_A_ (W)w);
1249 if (ev_is_active (w))
1250 return;
1251
1252 checks [w->active - 1] = checks [--checkcnt];
1253 ev_stop (EV_A_ (W)w);
1254}
1255 2094
1256#ifndef SA_RESTART 2095#ifndef SA_RESTART
1257# define SA_RESTART 0 2096# define SA_RESTART 0
1258#endif 2097#endif
1259 2098
1260void 2099void noinline
1261ev_signal_start (EV_P_ struct ev_signal *w) 2100ev_signal_start (EV_P_ ev_signal *w)
1262{ 2101{
1263#if EV_MULTIPLICITY 2102#if EV_MULTIPLICITY
1264 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2103 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1265#endif 2104#endif
1266 if (ev_is_active (w)) 2105 if (expect_false (ev_is_active (w)))
1267 return; 2106 return;
1268 2107
1269 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2108 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1270 2109
2110 evpipe_init (EV_A);
2111
2112 {
2113#ifndef _WIN32
2114 sigset_t full, prev;
2115 sigfillset (&full);
2116 sigprocmask (SIG_SETMASK, &full, &prev);
2117#endif
2118
2119 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2120
2121#ifndef _WIN32
2122 sigprocmask (SIG_SETMASK, &prev, 0);
2123#endif
2124 }
2125
1271 ev_start (EV_A_ (W)w, 1); 2126 ev_start (EV_A_ (W)w, 1);
1272 array_needsize (signals, signalmax, w->signum, signals_init);
1273 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2127 wlist_add (&signals [w->signum - 1].head, (WL)w);
1274 2128
1275 if (!w->next) 2129 if (!((WL)w)->next)
1276 { 2130 {
2131#if _WIN32
2132 signal (w->signum, ev_sighandler);
2133#else
1277 struct sigaction sa; 2134 struct sigaction sa;
1278 sa.sa_handler = sighandler; 2135 sa.sa_handler = ev_sighandler;
1279 sigfillset (&sa.sa_mask); 2136 sigfillset (&sa.sa_mask);
1280 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2137 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1281 sigaction (w->signum, &sa, 0); 2138 sigaction (w->signum, &sa, 0);
2139#endif
1282 } 2140 }
1283} 2141}
1284 2142
1285void 2143void noinline
1286ev_signal_stop (EV_P_ struct ev_signal *w) 2144ev_signal_stop (EV_P_ ev_signal *w)
1287{ 2145{
1288 ev_clear_pending (EV_A_ (W)w); 2146 clear_pending (EV_A_ (W)w);
1289 if (!ev_is_active (w)) 2147 if (expect_false (!ev_is_active (w)))
1290 return; 2148 return;
1291 2149
1292 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2150 wlist_del (&signals [w->signum - 1].head, (WL)w);
1293 ev_stop (EV_A_ (W)w); 2151 ev_stop (EV_A_ (W)w);
1294 2152
1295 if (!signals [w->signum - 1].head) 2153 if (!signals [w->signum - 1].head)
1296 signal (w->signum, SIG_DFL); 2154 signal (w->signum, SIG_DFL);
1297} 2155}
1298 2156
1299void 2157void
1300ev_child_start (EV_P_ struct ev_child *w) 2158ev_child_start (EV_P_ ev_child *w)
1301{ 2159{
1302#if EV_MULTIPLICITY 2160#if EV_MULTIPLICITY
1303 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2161 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1304#endif 2162#endif
1305 if (ev_is_active (w)) 2163 if (expect_false (ev_is_active (w)))
1306 return; 2164 return;
1307 2165
1308 ev_start (EV_A_ (W)w, 1); 2166 ev_start (EV_A_ (W)w, 1);
1309 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2167 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1310} 2168}
1311 2169
1312void 2170void
1313ev_child_stop (EV_P_ struct ev_child *w) 2171ev_child_stop (EV_P_ ev_child *w)
1314{ 2172{
1315 ev_clear_pending (EV_A_ (W)w); 2173 clear_pending (EV_A_ (W)w);
1316 if (ev_is_active (w)) 2174 if (expect_false (!ev_is_active (w)))
1317 return; 2175 return;
1318 2176
1319 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2177 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1320 ev_stop (EV_A_ (W)w); 2178 ev_stop (EV_A_ (W)w);
1321} 2179}
1322 2180
2181#if EV_STAT_ENABLE
2182
2183# ifdef _WIN32
2184# undef lstat
2185# define lstat(a,b) _stati64 (a,b)
2186# endif
2187
2188#define DEF_STAT_INTERVAL 5.0074891
2189#define MIN_STAT_INTERVAL 0.1074891
2190
2191static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2192
2193#if EV_USE_INOTIFY
2194# define EV_INOTIFY_BUFSIZE 8192
2195
2196static void noinline
2197infy_add (EV_P_ ev_stat *w)
2198{
2199 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
2200
2201 if (w->wd < 0)
2202 {
2203 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2204
2205 /* monitor some parent directory for speedup hints */
2206 /* note that exceeding the hardcoded limit is not a correctness issue, */
2207 /* but an efficiency issue only */
2208 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2209 {
2210 char path [4096];
2211 strcpy (path, w->path);
2212
2213 do
2214 {
2215 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2216 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2217
2218 char *pend = strrchr (path, '/');
2219
2220 if (!pend)
2221 break; /* whoops, no '/', complain to your admin */
2222
2223 *pend = 0;
2224 w->wd = inotify_add_watch (fs_fd, path, mask);
2225 }
2226 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2227 }
2228 }
2229 else
2230 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2231
2232 if (w->wd >= 0)
2233 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2234}
2235
2236static void noinline
2237infy_del (EV_P_ ev_stat *w)
2238{
2239 int slot;
2240 int wd = w->wd;
2241
2242 if (wd < 0)
2243 return;
2244
2245 w->wd = -2;
2246 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2247 wlist_del (&fs_hash [slot].head, (WL)w);
2248
2249 /* remove this watcher, if others are watching it, they will rearm */
2250 inotify_rm_watch (fs_fd, wd);
2251}
2252
2253static void noinline
2254infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2255{
2256 if (slot < 0)
2257 /* overflow, need to check for all hahs slots */
2258 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2259 infy_wd (EV_A_ slot, wd, ev);
2260 else
2261 {
2262 WL w_;
2263
2264 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2265 {
2266 ev_stat *w = (ev_stat *)w_;
2267 w_ = w_->next; /* lets us remove this watcher and all before it */
2268
2269 if (w->wd == wd || wd == -1)
2270 {
2271 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2272 {
2273 w->wd = -1;
2274 infy_add (EV_A_ w); /* re-add, no matter what */
2275 }
2276
2277 stat_timer_cb (EV_A_ &w->timer, 0);
2278 }
2279 }
2280 }
2281}
2282
2283static void
2284infy_cb (EV_P_ ev_io *w, int revents)
2285{
2286 char buf [EV_INOTIFY_BUFSIZE];
2287 struct inotify_event *ev = (struct inotify_event *)buf;
2288 int ofs;
2289 int len = read (fs_fd, buf, sizeof (buf));
2290
2291 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2292 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2293}
2294
2295void inline_size
2296infy_init (EV_P)
2297{
2298 if (fs_fd != -2)
2299 return;
2300
2301 fs_fd = inotify_init ();
2302
2303 if (fs_fd >= 0)
2304 {
2305 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2306 ev_set_priority (&fs_w, EV_MAXPRI);
2307 ev_io_start (EV_A_ &fs_w);
2308 }
2309}
2310
2311void inline_size
2312infy_fork (EV_P)
2313{
2314 int slot;
2315
2316 if (fs_fd < 0)
2317 return;
2318
2319 close (fs_fd);
2320 fs_fd = inotify_init ();
2321
2322 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2323 {
2324 WL w_ = fs_hash [slot].head;
2325 fs_hash [slot].head = 0;
2326
2327 while (w_)
2328 {
2329 ev_stat *w = (ev_stat *)w_;
2330 w_ = w_->next; /* lets us add this watcher */
2331
2332 w->wd = -1;
2333
2334 if (fs_fd >= 0)
2335 infy_add (EV_A_ w); /* re-add, no matter what */
2336 else
2337 ev_timer_start (EV_A_ &w->timer);
2338 }
2339
2340 }
2341}
2342
2343#endif
2344
2345void
2346ev_stat_stat (EV_P_ ev_stat *w)
2347{
2348 if (lstat (w->path, &w->attr) < 0)
2349 w->attr.st_nlink = 0;
2350 else if (!w->attr.st_nlink)
2351 w->attr.st_nlink = 1;
2352}
2353
2354static void noinline
2355stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2356{
2357 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2358
2359 /* we copy this here each the time so that */
2360 /* prev has the old value when the callback gets invoked */
2361 w->prev = w->attr;
2362 ev_stat_stat (EV_A_ w);
2363
2364 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2365 if (
2366 w->prev.st_dev != w->attr.st_dev
2367 || w->prev.st_ino != w->attr.st_ino
2368 || w->prev.st_mode != w->attr.st_mode
2369 || w->prev.st_nlink != w->attr.st_nlink
2370 || w->prev.st_uid != w->attr.st_uid
2371 || w->prev.st_gid != w->attr.st_gid
2372 || w->prev.st_rdev != w->attr.st_rdev
2373 || w->prev.st_size != w->attr.st_size
2374 || w->prev.st_atime != w->attr.st_atime
2375 || w->prev.st_mtime != w->attr.st_mtime
2376 || w->prev.st_ctime != w->attr.st_ctime
2377 ) {
2378 #if EV_USE_INOTIFY
2379 infy_del (EV_A_ w);
2380 infy_add (EV_A_ w);
2381 ev_stat_stat (EV_A_ w); /* avoid race... */
2382 #endif
2383
2384 ev_feed_event (EV_A_ w, EV_STAT);
2385 }
2386}
2387
2388void
2389ev_stat_start (EV_P_ ev_stat *w)
2390{
2391 if (expect_false (ev_is_active (w)))
2392 return;
2393
2394 /* since we use memcmp, we need to clear any padding data etc. */
2395 memset (&w->prev, 0, sizeof (ev_statdata));
2396 memset (&w->attr, 0, sizeof (ev_statdata));
2397
2398 ev_stat_stat (EV_A_ w);
2399
2400 if (w->interval < MIN_STAT_INTERVAL)
2401 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2402
2403 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2404 ev_set_priority (&w->timer, ev_priority (w));
2405
2406#if EV_USE_INOTIFY
2407 infy_init (EV_A);
2408
2409 if (fs_fd >= 0)
2410 infy_add (EV_A_ w);
2411 else
2412#endif
2413 ev_timer_start (EV_A_ &w->timer);
2414
2415 ev_start (EV_A_ (W)w, 1);
2416}
2417
2418void
2419ev_stat_stop (EV_P_ ev_stat *w)
2420{
2421 clear_pending (EV_A_ (W)w);
2422 if (expect_false (!ev_is_active (w)))
2423 return;
2424
2425#if EV_USE_INOTIFY
2426 infy_del (EV_A_ w);
2427#endif
2428 ev_timer_stop (EV_A_ &w->timer);
2429
2430 ev_stop (EV_A_ (W)w);
2431}
2432#endif
2433
2434#if EV_IDLE_ENABLE
2435void
2436ev_idle_start (EV_P_ ev_idle *w)
2437{
2438 if (expect_false (ev_is_active (w)))
2439 return;
2440
2441 pri_adjust (EV_A_ (W)w);
2442
2443 {
2444 int active = ++idlecnt [ABSPRI (w)];
2445
2446 ++idleall;
2447 ev_start (EV_A_ (W)w, active);
2448
2449 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2450 idles [ABSPRI (w)][active - 1] = w;
2451 }
2452}
2453
2454void
2455ev_idle_stop (EV_P_ ev_idle *w)
2456{
2457 clear_pending (EV_A_ (W)w);
2458 if (expect_false (!ev_is_active (w)))
2459 return;
2460
2461 {
2462 int active = ev_active (w);
2463
2464 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2465 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2466
2467 ev_stop (EV_A_ (W)w);
2468 --idleall;
2469 }
2470}
2471#endif
2472
2473void
2474ev_prepare_start (EV_P_ ev_prepare *w)
2475{
2476 if (expect_false (ev_is_active (w)))
2477 return;
2478
2479 ev_start (EV_A_ (W)w, ++preparecnt);
2480 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2481 prepares [preparecnt - 1] = w;
2482}
2483
2484void
2485ev_prepare_stop (EV_P_ ev_prepare *w)
2486{
2487 clear_pending (EV_A_ (W)w);
2488 if (expect_false (!ev_is_active (w)))
2489 return;
2490
2491 {
2492 int active = ev_active (w);
2493
2494 prepares [active - 1] = prepares [--preparecnt];
2495 ev_active (prepares [active - 1]) = active;
2496 }
2497
2498 ev_stop (EV_A_ (W)w);
2499}
2500
2501void
2502ev_check_start (EV_P_ ev_check *w)
2503{
2504 if (expect_false (ev_is_active (w)))
2505 return;
2506
2507 ev_start (EV_A_ (W)w, ++checkcnt);
2508 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2509 checks [checkcnt - 1] = w;
2510}
2511
2512void
2513ev_check_stop (EV_P_ ev_check *w)
2514{
2515 clear_pending (EV_A_ (W)w);
2516 if (expect_false (!ev_is_active (w)))
2517 return;
2518
2519 {
2520 int active = ev_active (w);
2521
2522 checks [active - 1] = checks [--checkcnt];
2523 ev_active (checks [active - 1]) = active;
2524 }
2525
2526 ev_stop (EV_A_ (W)w);
2527}
2528
2529#if EV_EMBED_ENABLE
2530void noinline
2531ev_embed_sweep (EV_P_ ev_embed *w)
2532{
2533 ev_loop (w->other, EVLOOP_NONBLOCK);
2534}
2535
2536static void
2537embed_io_cb (EV_P_ ev_io *io, int revents)
2538{
2539 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2540
2541 if (ev_cb (w))
2542 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2543 else
2544 ev_loop (w->other, EVLOOP_NONBLOCK);
2545}
2546
2547static void
2548embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2549{
2550 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2551
2552 {
2553 struct ev_loop *loop = w->other;
2554
2555 while (fdchangecnt)
2556 {
2557 fd_reify (EV_A);
2558 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2559 }
2560 }
2561}
2562
2563#if 0
2564static void
2565embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2566{
2567 ev_idle_stop (EV_A_ idle);
2568}
2569#endif
2570
2571void
2572ev_embed_start (EV_P_ ev_embed *w)
2573{
2574 if (expect_false (ev_is_active (w)))
2575 return;
2576
2577 {
2578 struct ev_loop *loop = w->other;
2579 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2580 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2581 }
2582
2583 ev_set_priority (&w->io, ev_priority (w));
2584 ev_io_start (EV_A_ &w->io);
2585
2586 ev_prepare_init (&w->prepare, embed_prepare_cb);
2587 ev_set_priority (&w->prepare, EV_MINPRI);
2588 ev_prepare_start (EV_A_ &w->prepare);
2589
2590 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2591
2592 ev_start (EV_A_ (W)w, 1);
2593}
2594
2595void
2596ev_embed_stop (EV_P_ ev_embed *w)
2597{
2598 clear_pending (EV_A_ (W)w);
2599 if (expect_false (!ev_is_active (w)))
2600 return;
2601
2602 ev_io_stop (EV_A_ &w->io);
2603 ev_prepare_stop (EV_A_ &w->prepare);
2604
2605 ev_stop (EV_A_ (W)w);
2606}
2607#endif
2608
2609#if EV_FORK_ENABLE
2610void
2611ev_fork_start (EV_P_ ev_fork *w)
2612{
2613 if (expect_false (ev_is_active (w)))
2614 return;
2615
2616 ev_start (EV_A_ (W)w, ++forkcnt);
2617 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2618 forks [forkcnt - 1] = w;
2619}
2620
2621void
2622ev_fork_stop (EV_P_ ev_fork *w)
2623{
2624 clear_pending (EV_A_ (W)w);
2625 if (expect_false (!ev_is_active (w)))
2626 return;
2627
2628 {
2629 int active = ev_active (w);
2630
2631 forks [active - 1] = forks [--forkcnt];
2632 ev_active (forks [active - 1]) = active;
2633 }
2634
2635 ev_stop (EV_A_ (W)w);
2636}
2637#endif
2638
2639#if EV_ASYNC_ENABLE
2640void
2641ev_async_start (EV_P_ ev_async *w)
2642{
2643 if (expect_false (ev_is_active (w)))
2644 return;
2645
2646 evpipe_init (EV_A);
2647
2648 ev_start (EV_A_ (W)w, ++asynccnt);
2649 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2650 asyncs [asynccnt - 1] = w;
2651}
2652
2653void
2654ev_async_stop (EV_P_ ev_async *w)
2655{
2656 clear_pending (EV_A_ (W)w);
2657 if (expect_false (!ev_is_active (w)))
2658 return;
2659
2660 {
2661 int active = ev_active (w);
2662
2663 asyncs [active - 1] = asyncs [--asynccnt];
2664 ev_active (asyncs [active - 1]) = active;
2665 }
2666
2667 ev_stop (EV_A_ (W)w);
2668}
2669
2670void
2671ev_async_send (EV_P_ ev_async *w)
2672{
2673 w->sent = 1;
2674 evpipe_write (EV_A_ &gotasync);
2675}
2676#endif
2677
1323/*****************************************************************************/ 2678/*****************************************************************************/
1324 2679
1325struct ev_once 2680struct ev_once
1326{ 2681{
1327 struct ev_io io; 2682 ev_io io;
1328 struct ev_timer to; 2683 ev_timer to;
1329 void (*cb)(int revents, void *arg); 2684 void (*cb)(int revents, void *arg);
1330 void *arg; 2685 void *arg;
1331}; 2686};
1332 2687
1333static void 2688static void
… …
1336 void (*cb)(int revents, void *arg) = once->cb; 2691 void (*cb)(int revents, void *arg) = once->cb;
1337 void *arg = once->arg; 2692 void *arg = once->arg;
1338 2693
1339 ev_io_stop (EV_A_ &once->io); 2694 ev_io_stop (EV_A_ &once->io);
1340 ev_timer_stop (EV_A_ &once->to); 2695 ev_timer_stop (EV_A_ &once->to);
1341 free (once); 2696 ev_free (once);
1342 2697
1343 cb (revents, arg); 2698 cb (revents, arg);
1344} 2699}
1345 2700
1346static void 2701static void
1347once_cb_io (EV_P_ struct ev_io *w, int revents) 2702once_cb_io (EV_P_ ev_io *w, int revents)
1348{ 2703{
1349 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2704 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1350} 2705}
1351 2706
1352static void 2707static void
1353once_cb_to (EV_P_ struct ev_timer *w, int revents) 2708once_cb_to (EV_P_ ev_timer *w, int revents)
1354{ 2709{
1355 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2710 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1356} 2711}
1357 2712
1358void 2713void
1359ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2714ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1360{ 2715{
1361 struct ev_once *once = malloc (sizeof (struct ev_once)); 2716 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1362 2717
1363 if (!once) 2718 if (expect_false (!once))
2719 {
1364 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 2720 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1365 else 2721 return;
1366 { 2722 }
2723
1367 once->cb = cb; 2724 once->cb = cb;
1368 once->arg = arg; 2725 once->arg = arg;
1369 2726
1370 ev_watcher_init (&once->io, once_cb_io); 2727 ev_init (&once->io, once_cb_io);
1371 if (fd >= 0) 2728 if (fd >= 0)
1372 { 2729 {
1373 ev_io_set (&once->io, fd, events); 2730 ev_io_set (&once->io, fd, events);
1374 ev_io_start (EV_A_ &once->io); 2731 ev_io_start (EV_A_ &once->io);
1375 } 2732 }
1376 2733
1377 ev_watcher_init (&once->to, once_cb_to); 2734 ev_init (&once->to, once_cb_to);
1378 if (timeout >= 0.) 2735 if (timeout >= 0.)
1379 { 2736 {
1380 ev_timer_set (&once->to, timeout, 0.); 2737 ev_timer_set (&once->to, timeout, 0.);
1381 ev_timer_start (EV_A_ &once->to); 2738 ev_timer_start (EV_A_ &once->to);
1382 }
1383 } 2739 }
1384} 2740}
1385 2741
2742#if EV_MULTIPLICITY
2743 #include "ev_wrap.h"
2744#endif
2745
2746#ifdef __cplusplus
2747}
2748#endif
2749

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