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Comparing libev/ev.c (file contents):
Revision 1.62 by root, Sun Nov 4 20:38:07 2007 UTC vs.
Revision 1.232 by root, Tue May 6 15:29:58 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
204#ifndef EV_USE_PORT
205# define EV_USE_PORT 0
206#endif
207
97#ifndef EV_USE_WIN32 208#ifndef EV_USE_INOTIFY
98# ifdef WIN32 209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
99# define EV_USE_WIN32 1 210# define EV_USE_INOTIFY 1
100# else 211# else
101# define EV_USE_WIN32 0 212# define EV_USE_INOTIFY 0
102# endif 213# endif
103#endif 214#endif
104 215
105#ifndef EV_USE_REALTIME 216#ifndef EV_PID_HASHSIZE
106# define EV_USE_REALTIME 1 217# if EV_MINIMAL
218# define EV_PID_HASHSIZE 1
219# else
220# define EV_PID_HASHSIZE 16
107#endif 221# endif
222#endif
108 223
109/**/ 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 */
110 241
111#ifndef CLOCK_MONOTONIC 242#ifndef CLOCK_MONOTONIC
112# undef EV_USE_MONOTONIC 243# undef EV_USE_MONOTONIC
113# define EV_USE_MONOTONIC 0 244# define EV_USE_MONOTONIC 0
114#endif 245#endif
… …
116#ifndef CLOCK_REALTIME 247#ifndef CLOCK_REALTIME
117# undef EV_USE_REALTIME 248# undef EV_USE_REALTIME
118# define EV_USE_REALTIME 0 249# define EV_USE_REALTIME 0
119#endif 250#endif
120 251
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
121/**/ 283/**/
122 284
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
123#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) */
124#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) */
125#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
126/*#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 */
127 298
128#include "ev.h"
129
130#if __GNUC__ >= 3 299#if __GNUC__ >= 4
131# define expect(expr,value) __builtin_expect ((expr),(value)) 300# define expect(expr,value) __builtin_expect ((expr),(value))
132# define inline inline 301# define noinline __attribute__ ((noinline))
133#else 302#else
134# define expect(expr,value) (expr) 303# define expect(expr,value) (expr)
135# define inline static 304# define noinline
305# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
306# define inline
307# endif
136#endif 308#endif
137 309
138#define expect_false(expr) expect ((expr) != 0, 0) 310#define expect_false(expr) expect ((expr) != 0, 0)
139#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
140 319
141#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 320#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
142#define ABSPRI(w) ((w)->priority - EV_MINPRI) 321#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
143 322
323#define EMPTY /* required for microsofts broken pseudo-c compiler */
324#define EMPTY2(a,b) /* used to suppress some warnings */
325
144typedef struct ev_watcher *W; 326typedef ev_watcher *W;
145typedef struct ev_watcher_list *WL; 327typedef ev_watcher_list *WL;
146typedef struct ev_watcher_time *WT; 328typedef ev_watcher_time *WT;
147 329
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 */
148static 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
149 342
150/*****************************************************************************/ 343/*****************************************************************************/
151 344
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
152typedef struct 410typedef struct
153{ 411{
154 struct ev_watcher_list *head; 412 WL head;
155 unsigned char events; 413 unsigned char events;
156 unsigned char reify; 414 unsigned char reify;
415#if EV_SELECT_IS_WINSOCKET
416 SOCKET handle;
417#endif
157} ANFD; 418} ANFD;
158 419
159typedef struct 420typedef struct
160{ 421{
161 W w; 422 W w;
162 int events; 423 int events;
163} ANPENDING; 424} ANPENDING;
164 425
426#if EV_USE_INOTIFY
427typedef struct
428{
429 WL head;
430} ANFS;
431#endif
432
165#if EV_MULTIPLICITY 433#if EV_MULTIPLICITY
166 434
167struct ev_loop 435 struct ev_loop
168{ 436 {
437 ev_tstamp ev_rt_now;
438 #define ev_rt_now ((loop)->ev_rt_now)
169# define VAR(name,decl) decl; 439 #define VAR(name,decl) decl;
170# include "ev_vars.h" 440 #include "ev_vars.h"
171};
172# undef VAR 441 #undef VAR
442 };
173# 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;
174 447
175#else 448#else
176 449
450 ev_tstamp ev_rt_now;
177# define VAR(name,decl) static decl; 451 #define VAR(name,decl) static decl;
178# include "ev_vars.h" 452 #include "ev_vars.h"
179# undef VAR 453 #undef VAR
454
455 static int ev_default_loop_ptr;
180 456
181#endif 457#endif
182 458
183/*****************************************************************************/ 459/*****************************************************************************/
184 460
185inline ev_tstamp 461ev_tstamp
186ev_time (void) 462ev_time (void)
187{ 463{
188#if EV_USE_REALTIME 464#if EV_USE_REALTIME
189 struct timespec ts; 465 struct timespec ts;
190 clock_gettime (CLOCK_REALTIME, &ts); 466 clock_gettime (CLOCK_REALTIME, &ts);
… …
194 gettimeofday (&tv, 0); 470 gettimeofday (&tv, 0);
195 return tv.tv_sec + tv.tv_usec * 1e-6; 471 return tv.tv_sec + tv.tv_usec * 1e-6;
196#endif 472#endif
197} 473}
198 474
199inline ev_tstamp 475ev_tstamp inline_size
200get_clock (void) 476get_clock (void)
201{ 477{
202#if EV_USE_MONOTONIC 478#if EV_USE_MONOTONIC
203 if (expect_true (have_monotonic)) 479 if (expect_true (have_monotonic))
204 { 480 {
… …
209#endif 485#endif
210 486
211 return ev_time (); 487 return ev_time ();
212} 488}
213 489
490#if EV_MULTIPLICITY
214ev_tstamp 491ev_tstamp
215ev_now (EV_P) 492ev_now (EV_P)
216{ 493{
217 return rt_now; 494 return ev_rt_now;
218} 495}
496#endif
219 497
220#define array_roundsize(base,n) ((n) | 4 & ~3) 498void
221 499ev_sleep (ev_tstamp delay)
222#define array_needsize(base,cur,cnt,init) \ 500{
223 if (expect_false ((cnt) > cur)) \ 501 if (delay > 0.)
224 { \
225 int newcnt = cur; \
226 do \
227 { \
228 newcnt = array_roundsize (base, newcnt << 1); \
229 } \
230 while ((cnt) > newcnt); \
231 \
232 base = realloc (base, sizeof (*base) * (newcnt)); \
233 init (base + cur, newcnt - cur); \
234 cur = newcnt; \
235 } 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}
236 522
237/*****************************************************************************/ 523/*****************************************************************************/
238 524
239static 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
240anfds_init (ANFD *base, int count) 608anfds_init (ANFD *base, int count)
241{ 609{
242 while (count--) 610 while (count--)
243 { 611 {
244 base->head = 0; 612 base->head = 0;
… …
247 615
248 ++base; 616 ++base;
249 } 617 }
250} 618}
251 619
252static void 620void inline_speed
253event (EV_P_ W w, int events)
254{
255 if (w->pending)
256 {
257 pendings [ABSPRI (w)][w->pending - 1].events |= events;
258 return;
259 }
260
261 w->pending = ++pendingcnt [ABSPRI (w)];
262 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
263 pendings [ABSPRI (w)][w->pending - 1].w = w;
264 pendings [ABSPRI (w)][w->pending - 1].events = events;
265}
266
267static void
268queue_events (EV_P_ W *events, int eventcnt, int type)
269{
270 int i;
271
272 for (i = 0; i < eventcnt; ++i)
273 event (EV_A_ events [i], type);
274}
275
276static void
277fd_event (EV_P_ int fd, int events) 621fd_event (EV_P_ int fd, int revents)
278{ 622{
279 ANFD *anfd = anfds + fd; 623 ANFD *anfd = anfds + fd;
280 struct ev_io *w; 624 ev_io *w;
281 625
282 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)
283 { 627 {
284 int ev = w->events & events; 628 int ev = w->events & revents;
285 629
286 if (ev) 630 if (ev)
287 event (EV_A_ (W)w, ev); 631 ev_feed_event (EV_A_ (W)w, ev);
288 } 632 }
289} 633}
290 634
291/*****************************************************************************/ 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}
292 641
293static void 642void inline_size
294fd_reify (EV_P) 643fd_reify (EV_P)
295{ 644{
296 int i; 645 int i;
297 646
298 for (i = 0; i < fdchangecnt; ++i) 647 for (i = 0; i < fdchangecnt; ++i)
299 { 648 {
300 int fd = fdchanges [i]; 649 int fd = fdchanges [i];
301 ANFD *anfd = anfds + fd; 650 ANFD *anfd = anfds + fd;
302 struct ev_io *w; 651 ev_io *w;
303 652
304 int events = 0; 653 unsigned char events = 0;
305 654
306 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)
307 events |= w->events; 656 events |= (unsigned char)w->events;
308 657
309 anfd->reify = 0; 658#if EV_SELECT_IS_WINSOCKET
310 659 if (events)
311 if (anfd->events != events)
312 { 660 {
313 method_modify (EV_A_ fd, anfd->events, events); 661 unsigned long argp;
314 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));
315 } 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 }
316 } 681 }
317 682
318 fdchangecnt = 0; 683 fdchangecnt = 0;
319} 684}
320 685
321static void 686void inline_size
322fd_change (EV_P_ int fd) 687fd_change (EV_P_ int fd, int flags)
323{ 688{
324 if (anfds [fd].reify || fdchangecnt < 0) 689 unsigned char reify = anfds [fd].reify;
325 return;
326
327 anfds [fd].reify = 1; 690 anfds [fd].reify |= flags;
328 691
692 if (expect_true (!reify))
693 {
329 ++fdchangecnt; 694 ++fdchangecnt;
330 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 695 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
331 fdchanges [fdchangecnt - 1] = fd; 696 fdchanges [fdchangecnt - 1] = fd;
697 }
332} 698}
333 699
334static void 700void inline_speed
335fd_kill (EV_P_ int fd) 701fd_kill (EV_P_ int fd)
336{ 702{
337 struct ev_io *w; 703 ev_io *w;
338 704
339 while ((w = (struct ev_io *)anfds [fd].head)) 705 while ((w = (ev_io *)anfds [fd].head))
340 { 706 {
341 ev_io_stop (EV_A_ w); 707 ev_io_stop (EV_A_ w);
342 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);
343 } 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
344} 720}
345 721
346/* called on EBADF to verify fds */ 722/* called on EBADF to verify fds */
347static void 723static void noinline
348fd_ebadf (EV_P) 724fd_ebadf (EV_P)
349{ 725{
350 int fd; 726 int fd;
351 727
352 for (fd = 0; fd < anfdmax; ++fd) 728 for (fd = 0; fd < anfdmax; ++fd)
353 if (anfds [fd].events) 729 if (anfds [fd].events)
354 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 730 if (!fd_valid (fd) == -1 && errno == EBADF)
355 fd_kill (EV_A_ fd); 731 fd_kill (EV_A_ fd);
356} 732}
357 733
358/* 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 */
359static void 735static void noinline
360fd_enomem (EV_P) 736fd_enomem (EV_P)
361{ 737{
362 int fd; 738 int fd;
363 739
364 for (fd = anfdmax; fd--; ) 740 for (fd = anfdmax; fd--; )
365 if (anfds [fd].events) 741 if (anfds [fd].events)
366 { 742 {
367 close (fd);
368 fd_kill (EV_A_ fd); 743 fd_kill (EV_A_ fd);
369 return; 744 return;
370 } 745 }
371} 746}
372 747
373/* 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 */
374static void 749static void noinline
375fd_rearm_all (EV_P) 750fd_rearm_all (EV_P)
376{ 751{
377 int fd; 752 int fd;
378 753
379 /* this should be highly optimised to not do anything but set a flag */
380 for (fd = 0; fd < anfdmax; ++fd) 754 for (fd = 0; fd < anfdmax; ++fd)
381 if (anfds [fd].events) 755 if (anfds [fd].events)
382 { 756 {
383 anfds [fd].events = 0; 757 anfds [fd].events = 0;
384 fd_change (EV_A_ fd); 758 fd_change (EV_A_ fd, EV_IOFDSET | 1);
385 } 759 }
386} 760}
387 761
388/*****************************************************************************/ 762/*****************************************************************************/
389 763
390static void 764/* towards the root */
765void inline_speed
391upheap (WT *heap, int k) 766upheap (WT *heap, int k)
392{ 767{
393 WT w = heap [k]; 768 WT w = heap [k];
394 769
395 while (k && heap [k >> 1]->at > w->at) 770 for (;;)
396 { 771 {
772 int p = k >> 1;
773
774 /* maybe we could use a dummy element at heap [0]? */
775 if (!p || heap [p]->at <= w->at)
776 break;
777
397 heap [k] = heap [k >> 1]; 778 heap [k] = heap [p];
398 ((W)heap [k])->active = k + 1; 779 ev_active (heap [k]) = k;
399 k >>= 1; 780 k = p;
400 } 781 }
401 782
402 heap [k] = w; 783 heap [k] = w;
403 ((W)heap [k])->active = k + 1; 784 ev_active (heap [k]) = k;
404
405} 785}
406 786
407static void 787/* away from the root */
788void inline_speed
408downheap (WT *heap, int N, int k) 789downheap (WT *heap, int N, int k)
409{ 790{
410 WT w = heap [k]; 791 WT w = heap [k];
411 792
412 while (k < (N >> 1)) 793 for (;;)
413 { 794 {
414 int j = k << 1; 795 int c = k << 1;
415 796
416 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 797 if (c > N)
417 ++j;
418
419 if (w->at <= heap [j]->at)
420 break; 798 break;
421 799
800 c += c < N && heap [c]->at > heap [c + 1]->at
801 ? 1 : 0;
802
803 if (w->at <= heap [c]->at)
804 break;
805
422 heap [k] = heap [j]; 806 heap [k] = heap [c];
423 ((W)heap [k])->active = k + 1; 807 ev_active (heap [k]) = k;
808
424 k = j; 809 k = c;
425 } 810 }
426 811
427 heap [k] = w; 812 heap [k] = w;
428 ((W)heap [k])->active = k + 1; 813 ev_active (heap [k]) = k;
814}
815
816void inline_size
817adjustheap (WT *heap, int N, int k)
818{
819 upheap (heap, k);
820 downheap (heap, N, k);
429} 821}
430 822
431/*****************************************************************************/ 823/*****************************************************************************/
432 824
433typedef struct 825typedef struct
434{ 826{
435 struct ev_watcher_list *head; 827 WL head;
436 sig_atomic_t volatile gotsig; 828 EV_ATOMIC_T gotsig;
437} ANSIG; 829} ANSIG;
438 830
439static ANSIG *signals; 831static ANSIG *signals;
440static int signalmax; 832static int signalmax;
441 833
442static int sigpipe [2]; 834static EV_ATOMIC_T gotsig;
443static sig_atomic_t volatile gotsig;
444static struct ev_io sigev;
445 835
446static void 836void inline_size
447signals_init (ANSIG *base, int count) 837signals_init (ANSIG *base, int count)
448{ 838{
449 while (count--) 839 while (count--)
450 { 840 {
451 base->head = 0; 841 base->head = 0;
… …
453 843
454 ++base; 844 ++base;
455 } 845 }
456} 846}
457 847
848/*****************************************************************************/
849
850void inline_speed
851fd_intern (int fd)
852{
853#ifdef _WIN32
854 int arg = 1;
855 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
856#else
857 fcntl (fd, F_SETFD, FD_CLOEXEC);
858 fcntl (fd, F_SETFL, O_NONBLOCK);
859#endif
860}
861
862static void noinline
863evpipe_init (EV_P)
864{
865 if (!ev_is_active (&pipeev))
866 {
867#if EV_USE_EVENTFD
868 if ((evfd = eventfd (0, 0)) >= 0)
869 {
870 evpipe [0] = -1;
871 fd_intern (evfd);
872 ev_io_set (&pipeev, evfd, EV_READ);
873 }
874 else
875#endif
876 {
877 while (pipe (evpipe))
878 syserr ("(libev) error creating signal/async pipe");
879
880 fd_intern (evpipe [0]);
881 fd_intern (evpipe [1]);
882 ev_io_set (&pipeev, evpipe [0], EV_READ);
883 }
884
885 ev_io_start (EV_A_ &pipeev);
886 ev_unref (EV_A); /* watcher should not keep loop alive */
887 }
888}
889
890void inline_size
891evpipe_write (EV_P_ EV_ATOMIC_T *flag)
892{
893 if (!*flag)
894 {
895 int old_errno = errno; /* save errno because write might clobber it */
896
897 *flag = 1;
898
899#if EV_USE_EVENTFD
900 if (evfd >= 0)
901 {
902 uint64_t counter = 1;
903 write (evfd, &counter, sizeof (uint64_t));
904 }
905 else
906#endif
907 write (evpipe [1], &old_errno, 1);
908
909 errno = old_errno;
910 }
911}
912
458static void 913static void
914pipecb (EV_P_ ev_io *iow, int revents)
915{
916#if EV_USE_EVENTFD
917 if (evfd >= 0)
918 {
919 uint64_t counter;
920 read (evfd, &counter, sizeof (uint64_t));
921 }
922 else
923#endif
924 {
925 char dummy;
926 read (evpipe [0], &dummy, 1);
927 }
928
929 if (gotsig && ev_is_default_loop (EV_A))
930 {
931 int signum;
932 gotsig = 0;
933
934 for (signum = signalmax; signum--; )
935 if (signals [signum].gotsig)
936 ev_feed_signal_event (EV_A_ signum + 1);
937 }
938
939#if EV_ASYNC_ENABLE
940 if (gotasync)
941 {
942 int i;
943 gotasync = 0;
944
945 for (i = asynccnt; i--; )
946 if (asyncs [i]->sent)
947 {
948 asyncs [i]->sent = 0;
949 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
950 }
951 }
952#endif
953}
954
955/*****************************************************************************/
956
957static void
459sighandler (int signum) 958ev_sighandler (int signum)
460{ 959{
960#if EV_MULTIPLICITY
961 struct ev_loop *loop = &default_loop_struct;
962#endif
963
964#if _WIN32
965 signal (signum, ev_sighandler);
966#endif
967
461 signals [signum - 1].gotsig = 1; 968 signals [signum - 1].gotsig = 1;
462 969 evpipe_write (EV_A_ &gotsig);
463 if (!gotsig)
464 {
465 int old_errno = errno;
466 gotsig = 1;
467 write (sigpipe [1], &signum, 1);
468 errno = old_errno;
469 }
470} 970}
471 971
472static void 972void noinline
473sigcb (EV_P_ struct ev_io *iow, int revents) 973ev_feed_signal_event (EV_P_ int signum)
474{ 974{
475 struct ev_watcher_list *w; 975 WL w;
976
977#if EV_MULTIPLICITY
978 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
979#endif
980
476 int signum; 981 --signum;
477 982
478 read (sigpipe [0], &revents, 1); 983 if (signum < 0 || signum >= signalmax)
479 gotsig = 0; 984 return;
480 985
481 for (signum = signalmax; signum--; )
482 if (signals [signum].gotsig)
483 {
484 signals [signum].gotsig = 0; 986 signals [signum].gotsig = 0;
485 987
486 for (w = signals [signum].head; w; w = w->next) 988 for (w = signals [signum].head; w; w = w->next)
487 event (EV_A_ (W)w, EV_SIGNAL); 989 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
488 }
489}
490
491static void
492siginit (EV_P)
493{
494#ifndef WIN32
495 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
496 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
497
498 /* rather than sort out wether we really need nb, set it */
499 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
500 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
501#endif
502
503 ev_io_set (&sigev, sigpipe [0], EV_READ);
504 ev_io_start (EV_A_ &sigev);
505 ev_unref (EV_A); /* child watcher should not keep loop alive */
506} 990}
507 991
508/*****************************************************************************/ 992/*****************************************************************************/
509 993
994static WL childs [EV_PID_HASHSIZE];
995
510#ifndef WIN32 996#ifndef _WIN32
511 997
512static struct ev_child *childs [PID_HASHSIZE];
513static struct ev_signal childev; 998static ev_signal childev;
999
1000#ifndef WIFCONTINUED
1001# define WIFCONTINUED(status) 0
1002#endif
1003
1004void inline_speed
1005child_reap (EV_P_ int chain, int pid, int status)
1006{
1007 ev_child *w;
1008 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1009
1010 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1011 {
1012 if ((w->pid == pid || !w->pid)
1013 && (!traced || (w->flags & 1)))
1014 {
1015 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1016 w->rpid = pid;
1017 w->rstatus = status;
1018 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1019 }
1020 }
1021}
514 1022
515#ifndef WCONTINUED 1023#ifndef WCONTINUED
516# define WCONTINUED 0 1024# define WCONTINUED 0
517#endif 1025#endif
518 1026
519static void 1027static void
520child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
521{
522 struct ev_child *w;
523
524 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
525 if (w->pid == pid || !w->pid)
526 {
527 w->priority = sw->priority; /* need to do it *now* */
528 w->rpid = pid;
529 w->rstatus = status;
530 event (EV_A_ (W)w, EV_CHILD);
531 }
532}
533
534static void
535childcb (EV_P_ struct ev_signal *sw, int revents) 1028childcb (EV_P_ ev_signal *sw, int revents)
536{ 1029{
537 int pid, status; 1030 int pid, status;
538 1031
1032 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
539 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1033 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
540 { 1034 if (!WCONTINUED
1035 || errno != EINVAL
1036 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1037 return;
1038
541 /* make sure we are called again until all childs have been reaped */ 1039 /* make sure we are called again until all children have been reaped */
1040 /* we need to do it this way so that the callback gets called before we continue */
542 event (EV_A_ (W)sw, EV_SIGNAL); 1041 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
543 1042
544 child_reap (EV_A_ sw, pid, pid, status); 1043 child_reap (EV_A_ pid, pid, status);
1044 if (EV_PID_HASHSIZE > 1)
545 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1045 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
546 }
547} 1046}
548 1047
549#endif 1048#endif
550 1049
551/*****************************************************************************/ 1050/*****************************************************************************/
552 1051
1052#if EV_USE_PORT
1053# include "ev_port.c"
1054#endif
553#if EV_USE_KQUEUE 1055#if EV_USE_KQUEUE
554# include "ev_kqueue.c" 1056# include "ev_kqueue.c"
555#endif 1057#endif
556#if EV_USE_EPOLL 1058#if EV_USE_EPOLL
557# include "ev_epoll.c" 1059# include "ev_epoll.c"
… …
574{ 1076{
575 return EV_VERSION_MINOR; 1077 return EV_VERSION_MINOR;
576} 1078}
577 1079
578/* return true if we are running with elevated privileges and should ignore env variables */ 1080/* return true if we are running with elevated privileges and should ignore env variables */
579static int 1081int inline_size
580enable_secure (void) 1082enable_secure (void)
581{ 1083{
582#ifdef WIN32 1084#ifdef _WIN32
583 return 0; 1085 return 0;
584#else 1086#else
585 return getuid () != geteuid () 1087 return getuid () != geteuid ()
586 || getgid () != getegid (); 1088 || getgid () != getegid ();
587#endif 1089#endif
588} 1090}
589 1091
590int 1092unsigned int
591ev_method (EV_P) 1093ev_supported_backends (void)
592{ 1094{
593 return method; 1095 unsigned int flags = 0;
594}
595 1096
596static void 1097 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
597loop_init (EV_P_ int methods) 1098 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1099 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1100 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1101 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1102
1103 return flags;
1104}
1105
1106unsigned int
1107ev_recommended_backends (void)
598{ 1108{
599 if (!method) 1109 unsigned int flags = ev_supported_backends ();
1110
1111#ifndef __NetBSD__
1112 /* kqueue is borked on everything but netbsd apparently */
1113 /* it usually doesn't work correctly on anything but sockets and pipes */
1114 flags &= ~EVBACKEND_KQUEUE;
1115#endif
1116#ifdef __APPLE__
1117 // flags &= ~EVBACKEND_KQUEUE; for documentation
1118 flags &= ~EVBACKEND_POLL;
1119#endif
1120
1121 return flags;
1122}
1123
1124unsigned int
1125ev_embeddable_backends (void)
1126{
1127 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1128
1129 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1130 /* please fix it and tell me how to detect the fix */
1131 flags &= ~EVBACKEND_EPOLL;
1132
1133 return flags;
1134}
1135
1136unsigned int
1137ev_backend (EV_P)
1138{
1139 return backend;
1140}
1141
1142unsigned int
1143ev_loop_count (EV_P)
1144{
1145 return loop_count;
1146}
1147
1148void
1149ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1150{
1151 io_blocktime = interval;
1152}
1153
1154void
1155ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1156{
1157 timeout_blocktime = interval;
1158}
1159
1160static void noinline
1161loop_init (EV_P_ unsigned int flags)
1162{
1163 if (!backend)
600 { 1164 {
601#if EV_USE_MONOTONIC 1165#if EV_USE_MONOTONIC
602 { 1166 {
603 struct timespec ts; 1167 struct timespec ts;
604 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1168 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
605 have_monotonic = 1; 1169 have_monotonic = 1;
606 } 1170 }
607#endif 1171#endif
608 1172
609 rt_now = ev_time (); 1173 ev_rt_now = ev_time ();
610 mn_now = get_clock (); 1174 mn_now = get_clock ();
611 now_floor = mn_now; 1175 now_floor = mn_now;
612 rtmn_diff = rt_now - mn_now; 1176 rtmn_diff = ev_rt_now - mn_now;
613 1177
614 if (methods == EVMETHOD_AUTO) 1178 io_blocktime = 0.;
615 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1179 timeout_blocktime = 0.;
1180 backend = 0;
1181 backend_fd = -1;
1182 gotasync = 0;
1183#if EV_USE_INOTIFY
1184 fs_fd = -2;
1185#endif
1186
1187 /* pid check not overridable via env */
1188#ifndef _WIN32
1189 if (flags & EVFLAG_FORKCHECK)
1190 curpid = getpid ();
1191#endif
1192
1193 if (!(flags & EVFLAG_NOENV)
1194 && !enable_secure ()
1195 && getenv ("LIBEV_FLAGS"))
616 methods = atoi (getenv ("LIBEV_METHODS")); 1196 flags = atoi (getenv ("LIBEV_FLAGS"));
617 else
618 methods = EVMETHOD_ANY;
619 1197
620 method = 0; 1198 if (!(flags & 0x0000ffffU))
621#if EV_USE_WIN32 1199 flags |= ev_recommended_backends ();
622 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods); 1200
1201#if EV_USE_PORT
1202 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
623#endif 1203#endif
624#if EV_USE_KQUEUE 1204#if EV_USE_KQUEUE
625 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 1205 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
626#endif 1206#endif
627#if EV_USE_EPOLL 1207#if EV_USE_EPOLL
628 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 1208 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
629#endif 1209#endif
630#if EV_USE_POLL 1210#if EV_USE_POLL
631 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 1211 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
632#endif 1212#endif
633#if EV_USE_SELECT 1213#if EV_USE_SELECT
634 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 1214 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
635#endif 1215#endif
636 }
637}
638 1216
639void 1217 ev_init (&pipeev, pipecb);
1218 ev_set_priority (&pipeev, EV_MAXPRI);
1219 }
1220}
1221
1222static void noinline
640loop_destroy (EV_P) 1223loop_destroy (EV_P)
641{ 1224{
1225 int i;
1226
1227 if (ev_is_active (&pipeev))
1228 {
1229 ev_ref (EV_A); /* signal watcher */
1230 ev_io_stop (EV_A_ &pipeev);
1231
1232#if EV_USE_EVENTFD
1233 if (evfd >= 0)
1234 close (evfd);
1235#endif
1236
1237 if (evpipe [0] >= 0)
1238 {
1239 close (evpipe [0]);
1240 close (evpipe [1]);
1241 }
1242 }
1243
642#if EV_USE_WIN32 1244#if EV_USE_INOTIFY
643 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A); 1245 if (fs_fd >= 0)
1246 close (fs_fd);
1247#endif
1248
1249 if (backend_fd >= 0)
1250 close (backend_fd);
1251
1252#if EV_USE_PORT
1253 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
644#endif 1254#endif
645#if EV_USE_KQUEUE 1255#if EV_USE_KQUEUE
646 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1256 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
647#endif 1257#endif
648#if EV_USE_EPOLL 1258#if EV_USE_EPOLL
649 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1259 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
650#endif 1260#endif
651#if EV_USE_POLL 1261#if EV_USE_POLL
652 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1262 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
653#endif 1263#endif
654#if EV_USE_SELECT 1264#if EV_USE_SELECT
655 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1265 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
656#endif 1266#endif
657 1267
658 method = 0; 1268 for (i = NUMPRI; i--; )
659 /*TODO*/ 1269 {
660} 1270 array_free (pending, [i]);
1271#if EV_IDLE_ENABLE
1272 array_free (idle, [i]);
1273#endif
1274 }
661 1275
662void 1276 ev_free (anfds); anfdmax = 0;
1277
1278 /* have to use the microsoft-never-gets-it-right macro */
1279 array_free (fdchange, EMPTY);
1280 array_free (timer, EMPTY);
1281#if EV_PERIODIC_ENABLE
1282 array_free (periodic, EMPTY);
1283#endif
1284#if EV_FORK_ENABLE
1285 array_free (fork, EMPTY);
1286#endif
1287 array_free (prepare, EMPTY);
1288 array_free (check, EMPTY);
1289#if EV_ASYNC_ENABLE
1290 array_free (async, EMPTY);
1291#endif
1292
1293 backend = 0;
1294}
1295
1296#if EV_USE_INOTIFY
1297void inline_size infy_fork (EV_P);
1298#endif
1299
1300void inline_size
663loop_fork (EV_P) 1301loop_fork (EV_P)
664{ 1302{
665 /*TODO*/ 1303#if EV_USE_PORT
1304 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1305#endif
1306#if EV_USE_KQUEUE
1307 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1308#endif
666#if EV_USE_EPOLL 1309#if EV_USE_EPOLL
667 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1310 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
668#endif 1311#endif
669#if EV_USE_KQUEUE 1312#if EV_USE_INOTIFY
670 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 1313 infy_fork (EV_A);
671#endif 1314#endif
1315
1316 if (ev_is_active (&pipeev))
1317 {
1318 /* this "locks" the handlers against writing to the pipe */
1319 /* while we modify the fd vars */
1320 gotsig = 1;
1321#if EV_ASYNC_ENABLE
1322 gotasync = 1;
1323#endif
1324
1325 ev_ref (EV_A);
1326 ev_io_stop (EV_A_ &pipeev);
1327
1328#if EV_USE_EVENTFD
1329 if (evfd >= 0)
1330 close (evfd);
1331#endif
1332
1333 if (evpipe [0] >= 0)
1334 {
1335 close (evpipe [0]);
1336 close (evpipe [1]);
1337 }
1338
1339 evpipe_init (EV_A);
1340 /* now iterate over everything, in case we missed something */
1341 pipecb (EV_A_ &pipeev, EV_READ);
1342 }
1343
1344 postfork = 0;
672} 1345}
673 1346
674#if EV_MULTIPLICITY 1347#if EV_MULTIPLICITY
675struct ev_loop * 1348struct ev_loop *
676ev_loop_new (int methods) 1349ev_loop_new (unsigned int flags)
677{ 1350{
678 struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop)); 1351 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
679 1352
1353 memset (loop, 0, sizeof (struct ev_loop));
1354
680 loop_init (EV_A_ methods); 1355 loop_init (EV_A_ flags);
681 1356
682 if (ev_method (EV_A)) 1357 if (ev_backend (EV_A))
683 return loop; 1358 return loop;
684 1359
685 return 0; 1360 return 0;
686} 1361}
687 1362
688void 1363void
689ev_loop_destroy (EV_P) 1364ev_loop_destroy (EV_P)
690{ 1365{
691 loop_destroy (EV_A); 1366 loop_destroy (EV_A);
692 free (loop); 1367 ev_free (loop);
693} 1368}
694 1369
695void 1370void
696ev_loop_fork (EV_P) 1371ev_loop_fork (EV_P)
697{ 1372{
698 loop_fork (EV_A); 1373 postfork = 1; /* must be in line with ev_default_fork */
699} 1374}
700 1375
701#endif 1376#endif
702 1377
703#if EV_MULTIPLICITY 1378#if EV_MULTIPLICITY
704struct ev_loop default_loop_struct;
705static struct ev_loop *default_loop;
706
707struct ev_loop * 1379struct ev_loop *
1380ev_default_loop_init (unsigned int flags)
708#else 1381#else
709static int default_loop;
710
711int 1382int
1383ev_default_loop (unsigned int flags)
712#endif 1384#endif
713ev_default_loop (int methods)
714{ 1385{
715 if (sigpipe [0] == sigpipe [1])
716 if (pipe (sigpipe))
717 return 0;
718
719 if (!default_loop) 1386 if (!ev_default_loop_ptr)
720 { 1387 {
721#if EV_MULTIPLICITY 1388#if EV_MULTIPLICITY
722 struct ev_loop *loop = default_loop = &default_loop_struct; 1389 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
723#else 1390#else
724 default_loop = 1; 1391 ev_default_loop_ptr = 1;
725#endif 1392#endif
726 1393
727 loop_init (EV_A_ methods); 1394 loop_init (EV_A_ flags);
728 1395
729 if (ev_method (EV_A)) 1396 if (ev_backend (EV_A))
730 { 1397 {
731 ev_watcher_init (&sigev, sigcb);
732 ev_set_priority (&sigev, EV_MAXPRI);
733 siginit (EV_A);
734
735#ifndef WIN32 1398#ifndef _WIN32
736 ev_signal_init (&childev, childcb, SIGCHLD); 1399 ev_signal_init (&childev, childcb, SIGCHLD);
737 ev_set_priority (&childev, EV_MAXPRI); 1400 ev_set_priority (&childev, EV_MAXPRI);
738 ev_signal_start (EV_A_ &childev); 1401 ev_signal_start (EV_A_ &childev);
739 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1402 ev_unref (EV_A); /* child watcher should not keep loop alive */
740#endif 1403#endif
741 } 1404 }
742 else 1405 else
743 default_loop = 0; 1406 ev_default_loop_ptr = 0;
744 } 1407 }
745 1408
746 return default_loop; 1409 return ev_default_loop_ptr;
747} 1410}
748 1411
749void 1412void
750ev_default_destroy (void) 1413ev_default_destroy (void)
751{ 1414{
752#if EV_MULTIPLICITY 1415#if EV_MULTIPLICITY
753 struct ev_loop *loop = default_loop; 1416 struct ev_loop *loop = ev_default_loop_ptr;
754#endif 1417#endif
755 1418
1419#ifndef _WIN32
756 ev_ref (EV_A); /* child watcher */ 1420 ev_ref (EV_A); /* child watcher */
757 ev_signal_stop (EV_A_ &childev); 1421 ev_signal_stop (EV_A_ &childev);
758 1422#endif
759 ev_ref (EV_A); /* signal watcher */
760 ev_io_stop (EV_A_ &sigev);
761
762 close (sigpipe [0]); sigpipe [0] = 0;
763 close (sigpipe [1]); sigpipe [1] = 0;
764 1423
765 loop_destroy (EV_A); 1424 loop_destroy (EV_A);
766} 1425}
767 1426
768void 1427void
769ev_default_fork (void) 1428ev_default_fork (void)
770{ 1429{
771#if EV_MULTIPLICITY 1430#if EV_MULTIPLICITY
772 struct ev_loop *loop = default_loop; 1431 struct ev_loop *loop = ev_default_loop_ptr;
773#endif 1432#endif
774 1433
775 loop_fork (EV_A); 1434 if (backend)
776 1435 postfork = 1; /* must be in line with ev_loop_fork */
777 ev_io_stop (EV_A_ &sigev);
778 close (sigpipe [0]);
779 close (sigpipe [1]);
780 pipe (sigpipe);
781
782 ev_ref (EV_A); /* signal watcher */
783 siginit (EV_A);
784} 1436}
785 1437
786/*****************************************************************************/ 1438/*****************************************************************************/
787 1439
788static void 1440void
1441ev_invoke (EV_P_ void *w, int revents)
1442{
1443 EV_CB_INVOKE ((W)w, revents);
1444}
1445
1446void inline_speed
789call_pending (EV_P) 1447call_pending (EV_P)
790{ 1448{
791 int pri; 1449 int pri;
792 1450
793 for (pri = NUMPRI; pri--; ) 1451 for (pri = NUMPRI; pri--; )
794 while (pendingcnt [pri]) 1452 while (pendingcnt [pri])
795 { 1453 {
796 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1454 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
797 1455
798 if (p->w) 1456 if (expect_true (p->w))
799 { 1457 {
1458 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1459
800 p->w->pending = 0; 1460 p->w->pending = 0;
801 p->w->cb (EV_A_ p->w, p->events); 1461 EV_CB_INVOKE (p->w, p->events);
802 } 1462 }
803 } 1463 }
804} 1464}
805 1465
806static void 1466void inline_size
807timers_reify (EV_P) 1467timers_reify (EV_P)
808{ 1468{
809 while (timercnt && timers [0]->at <= mn_now) 1469 while (timercnt && ev_at (timers [1]) <= mn_now)
810 { 1470 {
811 struct ev_timer *w = timers [0]; 1471 ev_timer *w = (ev_timer *)timers [1];
812 1472
813 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1473 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
814 1474
815 /* first reschedule or stop timer */ 1475 /* first reschedule or stop timer */
816 if (w->repeat) 1476 if (w->repeat)
817 { 1477 {
818 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1478 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
819 w->at = mn_now + w->repeat; 1479
1480 ev_at (w) += w->repeat;
1481 if (ev_at (w) < mn_now)
1482 ev_at (w) = mn_now;
1483
820 downheap ((WT *)timers, timercnt, 0); 1484 downheap (timers, timercnt, 1);
821 } 1485 }
822 else 1486 else
823 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1487 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
824 1488
825 event (EV_A_ (W)w, EV_TIMEOUT); 1489 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
826 } 1490 }
827} 1491}
828 1492
829static void 1493#if EV_PERIODIC_ENABLE
1494void inline_size
830periodics_reify (EV_P) 1495periodics_reify (EV_P)
831{ 1496{
832 while (periodiccnt && periodics [0]->at <= rt_now) 1497 while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
833 { 1498 {
834 struct ev_periodic *w = periodics [0]; 1499 ev_periodic *w = (ev_periodic *)periodics [1];
835 1500
836 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1501 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
837 1502
838 /* first reschedule or stop timer */ 1503 /* first reschedule or stop timer */
839 if (w->interval) 1504 if (w->reschedule_cb)
840 { 1505 {
1506 ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1507 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
1508 downheap (periodics, periodiccnt, 1);
1509 }
1510 else if (w->interval)
1511 {
841 w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval; 1512 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1513 if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
842 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now)); 1514 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
843 downheap ((WT *)periodics, periodiccnt, 0); 1515 downheap (periodics, periodiccnt, 1);
844 } 1516 }
845 else 1517 else
846 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1518 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
847 1519
848 event (EV_A_ (W)w, EV_PERIODIC); 1520 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
849 } 1521 }
850} 1522}
851 1523
852static void 1524static void noinline
853periodics_reschedule (EV_P) 1525periodics_reschedule (EV_P)
854{ 1526{
855 int i; 1527 int i;
856 1528
857 /* adjust periodics after time jump */ 1529 /* adjust periodics after time jump */
858 for (i = 0; i < periodiccnt; ++i) 1530 for (i = 1; i <= periodiccnt; ++i)
859 { 1531 {
860 struct ev_periodic *w = periodics [i]; 1532 ev_periodic *w = (ev_periodic *)periodics [i];
861 1533
1534 if (w->reschedule_cb)
1535 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
862 if (w->interval) 1536 else if (w->interval)
1537 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1538 }
1539
1540 /* now rebuild the heap */
1541 for (i = periodiccnt >> 1; i--; )
1542 downheap (periodics, periodiccnt, i);
1543}
1544#endif
1545
1546#if EV_IDLE_ENABLE
1547void inline_size
1548idle_reify (EV_P)
1549{
1550 if (expect_false (idleall))
1551 {
1552 int pri;
1553
1554 for (pri = NUMPRI; pri--; )
863 { 1555 {
864 ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval; 1556 if (pendingcnt [pri])
1557 break;
865 1558
866 if (fabs (diff) >= 1e-4) 1559 if (idlecnt [pri])
867 { 1560 {
868 ev_periodic_stop (EV_A_ w); 1561 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
869 ev_periodic_start (EV_A_ w); 1562 break;
870
871 i = 0; /* restart loop, inefficient, but time jumps should be rare */
872 } 1563 }
873 } 1564 }
874 } 1565 }
875} 1566}
1567#endif
876 1568
877inline int 1569void inline_speed
878time_update_monotonic (EV_P) 1570time_update (EV_P_ ev_tstamp max_block)
879{
880 mn_now = get_clock ();
881
882 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
883 {
884 rt_now = rtmn_diff + mn_now;
885 return 0;
886 }
887 else
888 {
889 now_floor = mn_now;
890 rt_now = ev_time ();
891 return 1;
892 }
893}
894
895static void
896time_update (EV_P)
897{ 1571{
898 int i; 1572 int i;
899 1573
900#if EV_USE_MONOTONIC 1574#if EV_USE_MONOTONIC
901 if (expect_true (have_monotonic)) 1575 if (expect_true (have_monotonic))
902 { 1576 {
903 if (time_update_monotonic (EV_A)) 1577 ev_tstamp odiff = rtmn_diff;
1578
1579 mn_now = get_clock ();
1580
1581 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1582 /* interpolate in the meantime */
1583 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
904 { 1584 {
905 ev_tstamp odiff = rtmn_diff; 1585 ev_rt_now = rtmn_diff + mn_now;
1586 return;
1587 }
906 1588
1589 now_floor = mn_now;
1590 ev_rt_now = ev_time ();
1591
907 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1592 /* loop a few times, before making important decisions.
1593 * on the choice of "4": one iteration isn't enough,
1594 * in case we get preempted during the calls to
1595 * ev_time and get_clock. a second call is almost guaranteed
1596 * to succeed in that case, though. and looping a few more times
1597 * doesn't hurt either as we only do this on time-jumps or
1598 * in the unlikely event of having been preempted here.
1599 */
1600 for (i = 4; --i; )
908 { 1601 {
909 rtmn_diff = rt_now - mn_now; 1602 rtmn_diff = ev_rt_now - mn_now;
910 1603
911 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1604 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
912 return; /* all is well */ 1605 return; /* all is well */
913 1606
914 rt_now = ev_time (); 1607 ev_rt_now = ev_time ();
915 mn_now = get_clock (); 1608 mn_now = get_clock ();
916 now_floor = mn_now; 1609 now_floor = mn_now;
917 } 1610 }
918 1611
1612# if EV_PERIODIC_ENABLE
1613 periodics_reschedule (EV_A);
1614# endif
1615 /* no timer adjustment, as the monotonic clock doesn't jump */
1616 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1617 }
1618 else
1619#endif
1620 {
1621 ev_rt_now = ev_time ();
1622
1623 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1624 {
1625#if EV_PERIODIC_ENABLE
919 periodics_reschedule (EV_A); 1626 periodics_reschedule (EV_A);
920 /* no timer adjustment, as the monotonic clock doesn't jump */ 1627#endif
921 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */ 1628 /* adjust timers. this is easy, as the offset is the same for all of them */
1629 for (i = 1; i <= timercnt; ++i)
1630 ev_at (timers [i]) += ev_rt_now - mn_now;
922 } 1631 }
923 }
924 else
925#endif
926 {
927 rt_now = ev_time ();
928 1632
929 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
930 {
931 periodics_reschedule (EV_A);
932
933 /* adjust timers. this is easy, as the offset is the same for all */
934 for (i = 0; i < timercnt; ++i)
935 timers [i]->at += rt_now - mn_now;
936 }
937
938 mn_now = rt_now; 1633 mn_now = ev_rt_now;
939 } 1634 }
940} 1635}
941 1636
942void 1637void
943ev_ref (EV_P) 1638ev_ref (EV_P)
… …
954static int loop_done; 1649static int loop_done;
955 1650
956void 1651void
957ev_loop (EV_P_ int flags) 1652ev_loop (EV_P_ int flags)
958{ 1653{
959 double block; 1654 loop_done = EVUNLOOP_CANCEL;
960 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1655
1656 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
961 1657
962 do 1658 do
963 { 1659 {
1660#ifndef _WIN32
1661 if (expect_false (curpid)) /* penalise the forking check even more */
1662 if (expect_false (getpid () != curpid))
1663 {
1664 curpid = getpid ();
1665 postfork = 1;
1666 }
1667#endif
1668
1669#if EV_FORK_ENABLE
1670 /* we might have forked, so queue fork handlers */
1671 if (expect_false (postfork))
1672 if (forkcnt)
1673 {
1674 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1675 call_pending (EV_A);
1676 }
1677#endif
1678
964 /* queue check watchers (and execute them) */ 1679 /* queue prepare watchers (and execute them) */
965 if (expect_false (preparecnt)) 1680 if (expect_false (preparecnt))
966 { 1681 {
967 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1682 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
968 call_pending (EV_A); 1683 call_pending (EV_A);
969 } 1684 }
970 1685
1686 if (expect_false (!activecnt))
1687 break;
1688
1689 /* we might have forked, so reify kernel state if necessary */
1690 if (expect_false (postfork))
1691 loop_fork (EV_A);
1692
971 /* update fd-related kernel structures */ 1693 /* update fd-related kernel structures */
972 fd_reify (EV_A); 1694 fd_reify (EV_A);
973 1695
974 /* calculate blocking time */ 1696 /* calculate blocking time */
1697 {
1698 ev_tstamp waittime = 0.;
1699 ev_tstamp sleeptime = 0.;
975 1700
976 /* we only need this for !monotonic clockor timers, but as we basically 1701 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
977 always have timers, we just calculate it always */
978#if EV_USE_MONOTONIC
979 if (expect_true (have_monotonic))
980 time_update_monotonic (EV_A);
981 else
982#endif
983 { 1702 {
984 rt_now = ev_time (); 1703 /* update time to cancel out callback processing overhead */
985 mn_now = rt_now; 1704 time_update (EV_A_ 1e100);
986 }
987 1705
988 if (flags & EVLOOP_NONBLOCK || idlecnt)
989 block = 0.;
990 else
991 {
992 block = MAX_BLOCKTIME; 1706 waittime = MAX_BLOCKTIME;
993 1707
994 if (timercnt) 1708 if (timercnt)
995 { 1709 {
996 ev_tstamp to = timers [0]->at - mn_now + method_fudge; 1710 ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge;
997 if (block > to) block = to; 1711 if (waittime > to) waittime = to;
998 } 1712 }
999 1713
1714#if EV_PERIODIC_ENABLE
1000 if (periodiccnt) 1715 if (periodiccnt)
1001 { 1716 {
1002 ev_tstamp to = periodics [0]->at - rt_now + method_fudge; 1717 ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge;
1003 if (block > to) block = to; 1718 if (waittime > to) waittime = to;
1004 } 1719 }
1720#endif
1005 1721
1006 if (block < 0.) block = 0.; 1722 if (expect_false (waittime < timeout_blocktime))
1723 waittime = timeout_blocktime;
1724
1725 sleeptime = waittime - backend_fudge;
1726
1727 if (expect_true (sleeptime > io_blocktime))
1728 sleeptime = io_blocktime;
1729
1730 if (sleeptime)
1731 {
1732 ev_sleep (sleeptime);
1733 waittime -= sleeptime;
1734 }
1007 } 1735 }
1008 1736
1009 method_poll (EV_A_ block); 1737 ++loop_count;
1738 backend_poll (EV_A_ waittime);
1010 1739
1011 /* update rt_now, do magic */ 1740 /* update ev_rt_now, do magic */
1012 time_update (EV_A); 1741 time_update (EV_A_ waittime + sleeptime);
1742 }
1013 1743
1014 /* queue pending timers and reschedule them */ 1744 /* queue pending timers and reschedule them */
1015 timers_reify (EV_A); /* relative timers called last */ 1745 timers_reify (EV_A); /* relative timers called last */
1746#if EV_PERIODIC_ENABLE
1016 periodics_reify (EV_A); /* absolute timers called first */ 1747 periodics_reify (EV_A); /* absolute timers called first */
1748#endif
1017 1749
1750#if EV_IDLE_ENABLE
1018 /* queue idle watchers unless io or timers are pending */ 1751 /* queue idle watchers unless other events are pending */
1019 if (!pendingcnt) 1752 idle_reify (EV_A);
1020 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 1753#endif
1021 1754
1022 /* queue check watchers, to be executed first */ 1755 /* queue check watchers, to be executed first */
1023 if (checkcnt) 1756 if (expect_false (checkcnt))
1024 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 1757 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1025 1758
1026 call_pending (EV_A); 1759 call_pending (EV_A);
1027 } 1760 }
1028 while (activecnt && !loop_done); 1761 while (expect_true (
1762 activecnt
1763 && !loop_done
1764 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1765 ));
1029 1766
1030 if (loop_done != 2) 1767 if (loop_done == EVUNLOOP_ONE)
1031 loop_done = 0; 1768 loop_done = EVUNLOOP_CANCEL;
1032} 1769}
1033 1770
1034void 1771void
1035ev_unloop (EV_P_ int how) 1772ev_unloop (EV_P_ int how)
1036{ 1773{
1037 loop_done = how; 1774 loop_done = how;
1038} 1775}
1039 1776
1040/*****************************************************************************/ 1777/*****************************************************************************/
1041 1778
1042inline void 1779void inline_size
1043wlist_add (WL *head, WL elem) 1780wlist_add (WL *head, WL elem)
1044{ 1781{
1045 elem->next = *head; 1782 elem->next = *head;
1046 *head = elem; 1783 *head = elem;
1047} 1784}
1048 1785
1049inline void 1786void inline_size
1050wlist_del (WL *head, WL elem) 1787wlist_del (WL *head, WL elem)
1051{ 1788{
1052 while (*head) 1789 while (*head)
1053 { 1790 {
1054 if (*head == elem) 1791 if (*head == elem)
… …
1059 1796
1060 head = &(*head)->next; 1797 head = &(*head)->next;
1061 } 1798 }
1062} 1799}
1063 1800
1064inline void 1801void inline_speed
1065ev_clear_pending (EV_P_ W w) 1802clear_pending (EV_P_ W w)
1066{ 1803{
1067 if (w->pending) 1804 if (w->pending)
1068 { 1805 {
1069 pendings [ABSPRI (w)][w->pending - 1].w = 0; 1806 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1070 w->pending = 0; 1807 w->pending = 0;
1071 } 1808 }
1072} 1809}
1073 1810
1074inline void 1811int
1812ev_clear_pending (EV_P_ void *w)
1813{
1814 W w_ = (W)w;
1815 int pending = w_->pending;
1816
1817 if (expect_true (pending))
1818 {
1819 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1820 w_->pending = 0;
1821 p->w = 0;
1822 return p->events;
1823 }
1824 else
1825 return 0;
1826}
1827
1828void inline_size
1829pri_adjust (EV_P_ W w)
1830{
1831 int pri = w->priority;
1832 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1833 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1834 w->priority = pri;
1835}
1836
1837void inline_speed
1075ev_start (EV_P_ W w, int active) 1838ev_start (EV_P_ W w, int active)
1076{ 1839{
1077 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 1840 pri_adjust (EV_A_ w);
1078 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1079
1080 w->active = active; 1841 w->active = active;
1081 ev_ref (EV_A); 1842 ev_ref (EV_A);
1082} 1843}
1083 1844
1084inline void 1845void inline_size
1085ev_stop (EV_P_ W w) 1846ev_stop (EV_P_ W w)
1086{ 1847{
1087 ev_unref (EV_A); 1848 ev_unref (EV_A);
1088 w->active = 0; 1849 w->active = 0;
1089} 1850}
1090 1851
1091/*****************************************************************************/ 1852/*****************************************************************************/
1092 1853
1093void 1854void noinline
1094ev_io_start (EV_P_ struct ev_io *w) 1855ev_io_start (EV_P_ ev_io *w)
1095{ 1856{
1096 int fd = w->fd; 1857 int fd = w->fd;
1097 1858
1098 if (ev_is_active (w)) 1859 if (expect_false (ev_is_active (w)))
1099 return; 1860 return;
1100 1861
1101 assert (("ev_io_start called with negative fd", fd >= 0)); 1862 assert (("ev_io_start called with negative fd", fd >= 0));
1102 1863
1103 ev_start (EV_A_ (W)w, 1); 1864 ev_start (EV_A_ (W)w, 1);
1104 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1865 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1105 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1866 wlist_add (&anfds[fd].head, (WL)w);
1106 1867
1107 fd_change (EV_A_ fd); 1868 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1869 w->events &= ~EV_IOFDSET;
1108} 1870}
1109 1871
1110void 1872void noinline
1111ev_io_stop (EV_P_ struct ev_io *w) 1873ev_io_stop (EV_P_ ev_io *w)
1112{ 1874{
1113 ev_clear_pending (EV_A_ (W)w); 1875 clear_pending (EV_A_ (W)w);
1114 if (!ev_is_active (w)) 1876 if (expect_false (!ev_is_active (w)))
1115 return; 1877 return;
1116 1878
1879 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1880
1117 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1881 wlist_del (&anfds[w->fd].head, (WL)w);
1118 ev_stop (EV_A_ (W)w); 1882 ev_stop (EV_A_ (W)w);
1119 1883
1120 fd_change (EV_A_ w->fd); 1884 fd_change (EV_A_ w->fd, 1);
1121} 1885}
1122 1886
1123void 1887void noinline
1124ev_timer_start (EV_P_ struct ev_timer *w) 1888ev_timer_start (EV_P_ ev_timer *w)
1125{ 1889{
1126 if (ev_is_active (w)) 1890 if (expect_false (ev_is_active (w)))
1127 return; 1891 return;
1128 1892
1129 w->at += mn_now; 1893 ev_at (w) += mn_now;
1130 1894
1131 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 1895 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1132 1896
1133 ev_start (EV_A_ (W)w, ++timercnt); 1897 ev_start (EV_A_ (W)w, ++timercnt);
1134 array_needsize (timers, timermax, timercnt, ); 1898 array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2);
1135 timers [timercnt - 1] = w; 1899 timers [timercnt] = (WT)w;
1136 upheap ((WT *)timers, timercnt - 1); 1900 upheap (timers, timercnt);
1137 1901
1138 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 1902 /*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
1139} 1903}
1140 1904
1141void 1905void noinline
1142ev_timer_stop (EV_P_ struct ev_timer *w) 1906ev_timer_stop (EV_P_ ev_timer *w)
1143{ 1907{
1144 ev_clear_pending (EV_A_ (W)w); 1908 clear_pending (EV_A_ (W)w);
1145 if (!ev_is_active (w)) 1909 if (expect_false (!ev_is_active (w)))
1146 return; 1910 return;
1147 1911
1912 {
1913 int active = ev_active (w);
1914
1148 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 1915 assert (("internal timer heap corruption", timers [active] == (WT)w));
1149 1916
1150 if (((W)w)->active < timercnt--) 1917 if (expect_true (active < timercnt))
1151 { 1918 {
1152 timers [((W)w)->active - 1] = timers [timercnt]; 1919 timers [active] = timers [timercnt];
1153 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 1920 adjustheap (timers, timercnt, active);
1154 } 1921 }
1155 1922
1156 w->at = w->repeat; 1923 --timercnt;
1924 }
1925
1926 ev_at (w) -= mn_now;
1157 1927
1158 ev_stop (EV_A_ (W)w); 1928 ev_stop (EV_A_ (W)w);
1159} 1929}
1160 1930
1161void 1931void noinline
1162ev_timer_again (EV_P_ struct ev_timer *w) 1932ev_timer_again (EV_P_ ev_timer *w)
1163{ 1933{
1164 if (ev_is_active (w)) 1934 if (ev_is_active (w))
1165 { 1935 {
1166 if (w->repeat) 1936 if (w->repeat)
1167 { 1937 {
1168 w->at = mn_now + w->repeat; 1938 ev_at (w) = mn_now + w->repeat;
1169 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 1939 adjustheap (timers, timercnt, ev_active (w));
1170 } 1940 }
1171 else 1941 else
1172 ev_timer_stop (EV_A_ w); 1942 ev_timer_stop (EV_A_ w);
1173 } 1943 }
1174 else if (w->repeat) 1944 else if (w->repeat)
1945 {
1946 ev_at (w) = w->repeat;
1175 ev_timer_start (EV_A_ w); 1947 ev_timer_start (EV_A_ w);
1948 }
1176} 1949}
1177 1950
1178void 1951#if EV_PERIODIC_ENABLE
1952void noinline
1179ev_periodic_start (EV_P_ struct ev_periodic *w) 1953ev_periodic_start (EV_P_ ev_periodic *w)
1180{ 1954{
1181 if (ev_is_active (w)) 1955 if (expect_false (ev_is_active (w)))
1182 return; 1956 return;
1183 1957
1958 if (w->reschedule_cb)
1959 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1960 else if (w->interval)
1961 {
1184 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 1962 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1185
1186 /* this formula differs from the one in periodic_reify because we do not always round up */ 1963 /* this formula differs from the one in periodic_reify because we do not always round up */
1187 if (w->interval)
1188 w->at += ceil ((rt_now - w->at) / w->interval) * w->interval; 1964 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1965 }
1966 else
1967 ev_at (w) = w->offset;
1189 1968
1190 ev_start (EV_A_ (W)w, ++periodiccnt); 1969 ev_start (EV_A_ (W)w, ++periodiccnt);
1191 array_needsize (periodics, periodicmax, periodiccnt, ); 1970 array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2);
1192 periodics [periodiccnt - 1] = w; 1971 periodics [periodiccnt] = (WT)w;
1193 upheap ((WT *)periodics, periodiccnt - 1); 1972 upheap (periodics, periodiccnt);
1194 1973
1195 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 1974 /*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
1196} 1975}
1197 1976
1198void 1977void noinline
1199ev_periodic_stop (EV_P_ struct ev_periodic *w) 1978ev_periodic_stop (EV_P_ ev_periodic *w)
1200{ 1979{
1201 ev_clear_pending (EV_A_ (W)w); 1980 clear_pending (EV_A_ (W)w);
1202 if (!ev_is_active (w)) 1981 if (expect_false (!ev_is_active (w)))
1203 return; 1982 return;
1204 1983
1984 {
1985 int active = ev_active (w);
1986
1205 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 1987 assert (("internal periodic heap corruption", periodics [active] == (WT)w));
1206 1988
1207 if (((W)w)->active < periodiccnt--) 1989 if (expect_true (active < periodiccnt))
1208 { 1990 {
1209 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 1991 periodics [active] = periodics [periodiccnt];
1210 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 1992 adjustheap (periodics, periodiccnt, active);
1211 } 1993 }
1994
1995 --periodiccnt;
1996 }
1212 1997
1213 ev_stop (EV_A_ (W)w); 1998 ev_stop (EV_A_ (W)w);
1214} 1999}
1215 2000
1216void 2001void noinline
1217ev_idle_start (EV_P_ struct ev_idle *w) 2002ev_periodic_again (EV_P_ ev_periodic *w)
1218{ 2003{
1219 if (ev_is_active (w)) 2004 /* TODO: use adjustheap and recalculation */
1220 return;
1221
1222 ev_start (EV_A_ (W)w, ++idlecnt);
1223 array_needsize (idles, idlemax, idlecnt, );
1224 idles [idlecnt - 1] = w;
1225}
1226
1227void
1228ev_idle_stop (EV_P_ struct ev_idle *w)
1229{
1230 ev_clear_pending (EV_A_ (W)w);
1231 if (ev_is_active (w))
1232 return;
1233
1234 idles [((W)w)->active - 1] = idles [--idlecnt];
1235 ev_stop (EV_A_ (W)w); 2005 ev_periodic_stop (EV_A_ w);
2006 ev_periodic_start (EV_A_ w);
1236} 2007}
1237 2008#endif
1238void
1239ev_prepare_start (EV_P_ struct ev_prepare *w)
1240{
1241 if (ev_is_active (w))
1242 return;
1243
1244 ev_start (EV_A_ (W)w, ++preparecnt);
1245 array_needsize (prepares, preparemax, preparecnt, );
1246 prepares [preparecnt - 1] = w;
1247}
1248
1249void
1250ev_prepare_stop (EV_P_ struct ev_prepare *w)
1251{
1252 ev_clear_pending (EV_A_ (W)w);
1253 if (ev_is_active (w))
1254 return;
1255
1256 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1257 ev_stop (EV_A_ (W)w);
1258}
1259
1260void
1261ev_check_start (EV_P_ struct ev_check *w)
1262{
1263 if (ev_is_active (w))
1264 return;
1265
1266 ev_start (EV_A_ (W)w, ++checkcnt);
1267 array_needsize (checks, checkmax, checkcnt, );
1268 checks [checkcnt - 1] = w;
1269}
1270
1271void
1272ev_check_stop (EV_P_ struct ev_check *w)
1273{
1274 ev_clear_pending (EV_A_ (W)w);
1275 if (ev_is_active (w))
1276 return;
1277
1278 checks [((W)w)->active - 1] = checks [--checkcnt];
1279 ev_stop (EV_A_ (W)w);
1280}
1281 2009
1282#ifndef SA_RESTART 2010#ifndef SA_RESTART
1283# define SA_RESTART 0 2011# define SA_RESTART 0
1284#endif 2012#endif
1285 2013
1286void 2014void noinline
1287ev_signal_start (EV_P_ struct ev_signal *w) 2015ev_signal_start (EV_P_ ev_signal *w)
1288{ 2016{
1289#if EV_MULTIPLICITY 2017#if EV_MULTIPLICITY
1290 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2018 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1291#endif 2019#endif
1292 if (ev_is_active (w)) 2020 if (expect_false (ev_is_active (w)))
1293 return; 2021 return;
1294 2022
1295 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2023 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1296 2024
2025 evpipe_init (EV_A);
2026
2027 {
2028#ifndef _WIN32
2029 sigset_t full, prev;
2030 sigfillset (&full);
2031 sigprocmask (SIG_SETMASK, &full, &prev);
2032#endif
2033
2034 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2035
2036#ifndef _WIN32
2037 sigprocmask (SIG_SETMASK, &prev, 0);
2038#endif
2039 }
2040
1297 ev_start (EV_A_ (W)w, 1); 2041 ev_start (EV_A_ (W)w, 1);
1298 array_needsize (signals, signalmax, w->signum, signals_init);
1299 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2042 wlist_add (&signals [w->signum - 1].head, (WL)w);
1300 2043
1301 if (!w->next) 2044 if (!((WL)w)->next)
1302 { 2045 {
2046#if _WIN32
2047 signal (w->signum, ev_sighandler);
2048#else
1303 struct sigaction sa; 2049 struct sigaction sa;
1304 sa.sa_handler = sighandler; 2050 sa.sa_handler = ev_sighandler;
1305 sigfillset (&sa.sa_mask); 2051 sigfillset (&sa.sa_mask);
1306 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2052 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1307 sigaction (w->signum, &sa, 0); 2053 sigaction (w->signum, &sa, 0);
2054#endif
1308 } 2055 }
1309} 2056}
1310 2057
1311void 2058void noinline
1312ev_signal_stop (EV_P_ struct ev_signal *w) 2059ev_signal_stop (EV_P_ ev_signal *w)
1313{ 2060{
1314 ev_clear_pending (EV_A_ (W)w); 2061 clear_pending (EV_A_ (W)w);
1315 if (!ev_is_active (w)) 2062 if (expect_false (!ev_is_active (w)))
1316 return; 2063 return;
1317 2064
1318 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2065 wlist_del (&signals [w->signum - 1].head, (WL)w);
1319 ev_stop (EV_A_ (W)w); 2066 ev_stop (EV_A_ (W)w);
1320 2067
1321 if (!signals [w->signum - 1].head) 2068 if (!signals [w->signum - 1].head)
1322 signal (w->signum, SIG_DFL); 2069 signal (w->signum, SIG_DFL);
1323} 2070}
1324 2071
1325void 2072void
1326ev_child_start (EV_P_ struct ev_child *w) 2073ev_child_start (EV_P_ ev_child *w)
1327{ 2074{
1328#if EV_MULTIPLICITY 2075#if EV_MULTIPLICITY
1329 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2076 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1330#endif 2077#endif
1331 if (ev_is_active (w)) 2078 if (expect_false (ev_is_active (w)))
1332 return; 2079 return;
1333 2080
1334 ev_start (EV_A_ (W)w, 1); 2081 ev_start (EV_A_ (W)w, 1);
1335 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2082 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1336} 2083}
1337 2084
1338void 2085void
1339ev_child_stop (EV_P_ struct ev_child *w) 2086ev_child_stop (EV_P_ ev_child *w)
1340{ 2087{
1341 ev_clear_pending (EV_A_ (W)w); 2088 clear_pending (EV_A_ (W)w);
1342 if (ev_is_active (w)) 2089 if (expect_false (!ev_is_active (w)))
1343 return; 2090 return;
1344 2091
1345 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2092 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1346 ev_stop (EV_A_ (W)w); 2093 ev_stop (EV_A_ (W)w);
1347} 2094}
1348 2095
2096#if EV_STAT_ENABLE
2097
2098# ifdef _WIN32
2099# undef lstat
2100# define lstat(a,b) _stati64 (a,b)
2101# endif
2102
2103#define DEF_STAT_INTERVAL 5.0074891
2104#define MIN_STAT_INTERVAL 0.1074891
2105
2106static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2107
2108#if EV_USE_INOTIFY
2109# define EV_INOTIFY_BUFSIZE 8192
2110
2111static void noinline
2112infy_add (EV_P_ ev_stat *w)
2113{
2114 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
2115
2116 if (w->wd < 0)
2117 {
2118 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2119
2120 /* monitor some parent directory for speedup hints */
2121 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2122 {
2123 char path [4096];
2124 strcpy (path, w->path);
2125
2126 do
2127 {
2128 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2129 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2130
2131 char *pend = strrchr (path, '/');
2132
2133 if (!pend)
2134 break; /* whoops, no '/', complain to your admin */
2135
2136 *pend = 0;
2137 w->wd = inotify_add_watch (fs_fd, path, mask);
2138 }
2139 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2140 }
2141 }
2142 else
2143 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2144
2145 if (w->wd >= 0)
2146 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2147}
2148
2149static void noinline
2150infy_del (EV_P_ ev_stat *w)
2151{
2152 int slot;
2153 int wd = w->wd;
2154
2155 if (wd < 0)
2156 return;
2157
2158 w->wd = -2;
2159 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2160 wlist_del (&fs_hash [slot].head, (WL)w);
2161
2162 /* remove this watcher, if others are watching it, they will rearm */
2163 inotify_rm_watch (fs_fd, wd);
2164}
2165
2166static void noinline
2167infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2168{
2169 if (slot < 0)
2170 /* overflow, need to check for all hahs slots */
2171 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2172 infy_wd (EV_A_ slot, wd, ev);
2173 else
2174 {
2175 WL w_;
2176
2177 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2178 {
2179 ev_stat *w = (ev_stat *)w_;
2180 w_ = w_->next; /* lets us remove this watcher and all before it */
2181
2182 if (w->wd == wd || wd == -1)
2183 {
2184 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2185 {
2186 w->wd = -1;
2187 infy_add (EV_A_ w); /* re-add, no matter what */
2188 }
2189
2190 stat_timer_cb (EV_A_ &w->timer, 0);
2191 }
2192 }
2193 }
2194}
2195
2196static void
2197infy_cb (EV_P_ ev_io *w, int revents)
2198{
2199 char buf [EV_INOTIFY_BUFSIZE];
2200 struct inotify_event *ev = (struct inotify_event *)buf;
2201 int ofs;
2202 int len = read (fs_fd, buf, sizeof (buf));
2203
2204 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2205 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2206}
2207
2208void inline_size
2209infy_init (EV_P)
2210{
2211 if (fs_fd != -2)
2212 return;
2213
2214 fs_fd = inotify_init ();
2215
2216 if (fs_fd >= 0)
2217 {
2218 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2219 ev_set_priority (&fs_w, EV_MAXPRI);
2220 ev_io_start (EV_A_ &fs_w);
2221 }
2222}
2223
2224void inline_size
2225infy_fork (EV_P)
2226{
2227 int slot;
2228
2229 if (fs_fd < 0)
2230 return;
2231
2232 close (fs_fd);
2233 fs_fd = inotify_init ();
2234
2235 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2236 {
2237 WL w_ = fs_hash [slot].head;
2238 fs_hash [slot].head = 0;
2239
2240 while (w_)
2241 {
2242 ev_stat *w = (ev_stat *)w_;
2243 w_ = w_->next; /* lets us add this watcher */
2244
2245 w->wd = -1;
2246
2247 if (fs_fd >= 0)
2248 infy_add (EV_A_ w); /* re-add, no matter what */
2249 else
2250 ev_timer_start (EV_A_ &w->timer);
2251 }
2252
2253 }
2254}
2255
2256#endif
2257
2258void
2259ev_stat_stat (EV_P_ ev_stat *w)
2260{
2261 if (lstat (w->path, &w->attr) < 0)
2262 w->attr.st_nlink = 0;
2263 else if (!w->attr.st_nlink)
2264 w->attr.st_nlink = 1;
2265}
2266
2267static void noinline
2268stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2269{
2270 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2271
2272 /* we copy this here each the time so that */
2273 /* prev has the old value when the callback gets invoked */
2274 w->prev = w->attr;
2275 ev_stat_stat (EV_A_ w);
2276
2277 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2278 if (
2279 w->prev.st_dev != w->attr.st_dev
2280 || w->prev.st_ino != w->attr.st_ino
2281 || w->prev.st_mode != w->attr.st_mode
2282 || w->prev.st_nlink != w->attr.st_nlink
2283 || w->prev.st_uid != w->attr.st_uid
2284 || w->prev.st_gid != w->attr.st_gid
2285 || w->prev.st_rdev != w->attr.st_rdev
2286 || w->prev.st_size != w->attr.st_size
2287 || w->prev.st_atime != w->attr.st_atime
2288 || w->prev.st_mtime != w->attr.st_mtime
2289 || w->prev.st_ctime != w->attr.st_ctime
2290 ) {
2291 #if EV_USE_INOTIFY
2292 infy_del (EV_A_ w);
2293 infy_add (EV_A_ w);
2294 ev_stat_stat (EV_A_ w); /* avoid race... */
2295 #endif
2296
2297 ev_feed_event (EV_A_ w, EV_STAT);
2298 }
2299}
2300
2301void
2302ev_stat_start (EV_P_ ev_stat *w)
2303{
2304 if (expect_false (ev_is_active (w)))
2305 return;
2306
2307 /* since we use memcmp, we need to clear any padding data etc. */
2308 memset (&w->prev, 0, sizeof (ev_statdata));
2309 memset (&w->attr, 0, sizeof (ev_statdata));
2310
2311 ev_stat_stat (EV_A_ w);
2312
2313 if (w->interval < MIN_STAT_INTERVAL)
2314 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2315
2316 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2317 ev_set_priority (&w->timer, ev_priority (w));
2318
2319#if EV_USE_INOTIFY
2320 infy_init (EV_A);
2321
2322 if (fs_fd >= 0)
2323 infy_add (EV_A_ w);
2324 else
2325#endif
2326 ev_timer_start (EV_A_ &w->timer);
2327
2328 ev_start (EV_A_ (W)w, 1);
2329}
2330
2331void
2332ev_stat_stop (EV_P_ ev_stat *w)
2333{
2334 clear_pending (EV_A_ (W)w);
2335 if (expect_false (!ev_is_active (w)))
2336 return;
2337
2338#if EV_USE_INOTIFY
2339 infy_del (EV_A_ w);
2340#endif
2341 ev_timer_stop (EV_A_ &w->timer);
2342
2343 ev_stop (EV_A_ (W)w);
2344}
2345#endif
2346
2347#if EV_IDLE_ENABLE
2348void
2349ev_idle_start (EV_P_ ev_idle *w)
2350{
2351 if (expect_false (ev_is_active (w)))
2352 return;
2353
2354 pri_adjust (EV_A_ (W)w);
2355
2356 {
2357 int active = ++idlecnt [ABSPRI (w)];
2358
2359 ++idleall;
2360 ev_start (EV_A_ (W)w, active);
2361
2362 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2363 idles [ABSPRI (w)][active - 1] = w;
2364 }
2365}
2366
2367void
2368ev_idle_stop (EV_P_ ev_idle *w)
2369{
2370 clear_pending (EV_A_ (W)w);
2371 if (expect_false (!ev_is_active (w)))
2372 return;
2373
2374 {
2375 int active = ev_active (w);
2376
2377 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2378 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2379
2380 ev_stop (EV_A_ (W)w);
2381 --idleall;
2382 }
2383}
2384#endif
2385
2386void
2387ev_prepare_start (EV_P_ ev_prepare *w)
2388{
2389 if (expect_false (ev_is_active (w)))
2390 return;
2391
2392 ev_start (EV_A_ (W)w, ++preparecnt);
2393 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2394 prepares [preparecnt - 1] = w;
2395}
2396
2397void
2398ev_prepare_stop (EV_P_ ev_prepare *w)
2399{
2400 clear_pending (EV_A_ (W)w);
2401 if (expect_false (!ev_is_active (w)))
2402 return;
2403
2404 {
2405 int active = ev_active (w);
2406
2407 prepares [active - 1] = prepares [--preparecnt];
2408 ev_active (prepares [active - 1]) = active;
2409 }
2410
2411 ev_stop (EV_A_ (W)w);
2412}
2413
2414void
2415ev_check_start (EV_P_ ev_check *w)
2416{
2417 if (expect_false (ev_is_active (w)))
2418 return;
2419
2420 ev_start (EV_A_ (W)w, ++checkcnt);
2421 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2422 checks [checkcnt - 1] = w;
2423}
2424
2425void
2426ev_check_stop (EV_P_ ev_check *w)
2427{
2428 clear_pending (EV_A_ (W)w);
2429 if (expect_false (!ev_is_active (w)))
2430 return;
2431
2432 {
2433 int active = ev_active (w);
2434
2435 checks [active - 1] = checks [--checkcnt];
2436 ev_active (checks [active - 1]) = active;
2437 }
2438
2439 ev_stop (EV_A_ (W)w);
2440}
2441
2442#if EV_EMBED_ENABLE
2443void noinline
2444ev_embed_sweep (EV_P_ ev_embed *w)
2445{
2446 ev_loop (w->other, EVLOOP_NONBLOCK);
2447}
2448
2449static void
2450embed_io_cb (EV_P_ ev_io *io, int revents)
2451{
2452 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2453
2454 if (ev_cb (w))
2455 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2456 else
2457 ev_loop (w->other, EVLOOP_NONBLOCK);
2458}
2459
2460static void
2461embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2462{
2463 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2464
2465 {
2466 struct ev_loop *loop = w->other;
2467
2468 while (fdchangecnt)
2469 {
2470 fd_reify (EV_A);
2471 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2472 }
2473 }
2474}
2475
2476#if 0
2477static void
2478embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2479{
2480 ev_idle_stop (EV_A_ idle);
2481}
2482#endif
2483
2484void
2485ev_embed_start (EV_P_ ev_embed *w)
2486{
2487 if (expect_false (ev_is_active (w)))
2488 return;
2489
2490 {
2491 struct ev_loop *loop = w->other;
2492 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2493 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2494 }
2495
2496 ev_set_priority (&w->io, ev_priority (w));
2497 ev_io_start (EV_A_ &w->io);
2498
2499 ev_prepare_init (&w->prepare, embed_prepare_cb);
2500 ev_set_priority (&w->prepare, EV_MINPRI);
2501 ev_prepare_start (EV_A_ &w->prepare);
2502
2503 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2504
2505 ev_start (EV_A_ (W)w, 1);
2506}
2507
2508void
2509ev_embed_stop (EV_P_ ev_embed *w)
2510{
2511 clear_pending (EV_A_ (W)w);
2512 if (expect_false (!ev_is_active (w)))
2513 return;
2514
2515 ev_io_stop (EV_A_ &w->io);
2516 ev_prepare_stop (EV_A_ &w->prepare);
2517
2518 ev_stop (EV_A_ (W)w);
2519}
2520#endif
2521
2522#if EV_FORK_ENABLE
2523void
2524ev_fork_start (EV_P_ ev_fork *w)
2525{
2526 if (expect_false (ev_is_active (w)))
2527 return;
2528
2529 ev_start (EV_A_ (W)w, ++forkcnt);
2530 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2531 forks [forkcnt - 1] = w;
2532}
2533
2534void
2535ev_fork_stop (EV_P_ ev_fork *w)
2536{
2537 clear_pending (EV_A_ (W)w);
2538 if (expect_false (!ev_is_active (w)))
2539 return;
2540
2541 {
2542 int active = ev_active (w);
2543
2544 forks [active - 1] = forks [--forkcnt];
2545 ev_active (forks [active - 1]) = active;
2546 }
2547
2548 ev_stop (EV_A_ (W)w);
2549}
2550#endif
2551
2552#if EV_ASYNC_ENABLE
2553void
2554ev_async_start (EV_P_ ev_async *w)
2555{
2556 if (expect_false (ev_is_active (w)))
2557 return;
2558
2559 evpipe_init (EV_A);
2560
2561 ev_start (EV_A_ (W)w, ++asynccnt);
2562 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2563 asyncs [asynccnt - 1] = w;
2564}
2565
2566void
2567ev_async_stop (EV_P_ ev_async *w)
2568{
2569 clear_pending (EV_A_ (W)w);
2570 if (expect_false (!ev_is_active (w)))
2571 return;
2572
2573 {
2574 int active = ev_active (w);
2575
2576 asyncs [active - 1] = asyncs [--asynccnt];
2577 ev_active (asyncs [active - 1]) = active;
2578 }
2579
2580 ev_stop (EV_A_ (W)w);
2581}
2582
2583void
2584ev_async_send (EV_P_ ev_async *w)
2585{
2586 w->sent = 1;
2587 evpipe_write (EV_A_ &gotasync);
2588}
2589#endif
2590
1349/*****************************************************************************/ 2591/*****************************************************************************/
1350 2592
1351struct ev_once 2593struct ev_once
1352{ 2594{
1353 struct ev_io io; 2595 ev_io io;
1354 struct ev_timer to; 2596 ev_timer to;
1355 void (*cb)(int revents, void *arg); 2597 void (*cb)(int revents, void *arg);
1356 void *arg; 2598 void *arg;
1357}; 2599};
1358 2600
1359static void 2601static void
… …
1362 void (*cb)(int revents, void *arg) = once->cb; 2604 void (*cb)(int revents, void *arg) = once->cb;
1363 void *arg = once->arg; 2605 void *arg = once->arg;
1364 2606
1365 ev_io_stop (EV_A_ &once->io); 2607 ev_io_stop (EV_A_ &once->io);
1366 ev_timer_stop (EV_A_ &once->to); 2608 ev_timer_stop (EV_A_ &once->to);
1367 free (once); 2609 ev_free (once);
1368 2610
1369 cb (revents, arg); 2611 cb (revents, arg);
1370} 2612}
1371 2613
1372static void 2614static void
1373once_cb_io (EV_P_ struct ev_io *w, int revents) 2615once_cb_io (EV_P_ ev_io *w, int revents)
1374{ 2616{
1375 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2617 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1376} 2618}
1377 2619
1378static void 2620static void
1379once_cb_to (EV_P_ struct ev_timer *w, int revents) 2621once_cb_to (EV_P_ ev_timer *w, int revents)
1380{ 2622{
1381 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2623 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1382} 2624}
1383 2625
1384void 2626void
1385ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2627ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1386{ 2628{
1387 struct ev_once *once = malloc (sizeof (struct ev_once)); 2629 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1388 2630
1389 if (!once) 2631 if (expect_false (!once))
2632 {
1390 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 2633 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1391 else 2634 return;
1392 { 2635 }
2636
1393 once->cb = cb; 2637 once->cb = cb;
1394 once->arg = arg; 2638 once->arg = arg;
1395 2639
1396 ev_watcher_init (&once->io, once_cb_io); 2640 ev_init (&once->io, once_cb_io);
1397 if (fd >= 0) 2641 if (fd >= 0)
1398 { 2642 {
1399 ev_io_set (&once->io, fd, events); 2643 ev_io_set (&once->io, fd, events);
1400 ev_io_start (EV_A_ &once->io); 2644 ev_io_start (EV_A_ &once->io);
1401 } 2645 }
1402 2646
1403 ev_watcher_init (&once->to, once_cb_to); 2647 ev_init (&once->to, once_cb_to);
1404 if (timeout >= 0.) 2648 if (timeout >= 0.)
1405 { 2649 {
1406 ev_timer_set (&once->to, timeout, 0.); 2650 ev_timer_set (&once->to, timeout, 0.);
1407 ev_timer_start (EV_A_ &once->to); 2651 ev_timer_start (EV_A_ &once->to);
1408 }
1409 } 2652 }
1410} 2653}
1411 2654
2655#if EV_MULTIPLICITY
2656 #include "ev_wrap.h"
2657#endif
2658
2659#ifdef __cplusplus
2660}
2661#endif
2662

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