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Comparing libev/ev.c (file contents):
Revision 1.65 by root, Sun Nov 4 23:29:48 2007 UTC vs.
Revision 1.235 by root, Wed May 7 14:45:17 2008 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
31#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
32# include "config.h" 49# include "config.h"
50# endif
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
499ev_sleep (ev_tstamp delay)
500{
501 if (delay > 0.)
502 {
503#if EV_USE_NANOSLEEP
504 struct timespec ts;
221 505
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}
522
523/*****************************************************************************/
524
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
222#define array_needsize(base,cur,cnt,init) \ 555#define array_needsize(type,base,cur,cnt,init) \
223 if (expect_false ((cnt) > cur)) \ 556 if (expect_false ((cnt) > (cur))) \
224 { \ 557 { \
225 int newcnt = cur; \ 558 int ocur_ = (cur); \
226 do \ 559 (base) = (type *)array_realloc \
227 { \ 560 (sizeof (type), (base), &(cur), (cnt)); \
228 newcnt = array_roundsize (base, newcnt << 1); \ 561 init ((base) + (ocur_), (cur) - ocur_); \
229 } \ 562 }
230 while ((cnt) > newcnt); \ 563
564#if 0
565#define array_slim(type,stem) \
566 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
231 \ 567 { \
232 base = realloc (base, sizeof (*base) * (newcnt)); \ 568 stem ## max = array_roundsize (stem ## cnt >> 1); \
233 init (base + cur, newcnt - cur); \ 569 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
234 cur = newcnt; \ 570 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
235 } 571 }
572#endif
236 573
237#define array_free(stem, idx) \ 574#define array_free(stem, idx) \
238 free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 575 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
239 576
240/*****************************************************************************/ 577/*****************************************************************************/
241 578
242static void 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
243anfds_init (ANFD *base, int count) 608anfds_init (ANFD *base, int count)
244{ 609{
245 while (count--) 610 while (count--)
246 { 611 {
247 base->head = 0; 612 base->head = 0;
… …
250 615
251 ++base; 616 ++base;
252 } 617 }
253} 618}
254 619
255static void 620void inline_speed
256event (EV_P_ W w, int events)
257{
258 if (w->pending)
259 {
260 pendings [ABSPRI (w)][w->pending - 1].events |= events;
261 return;
262 }
263
264 w->pending = ++pendingcnt [ABSPRI (w)];
265 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
266 pendings [ABSPRI (w)][w->pending - 1].w = w;
267 pendings [ABSPRI (w)][w->pending - 1].events = events;
268}
269
270static void
271queue_events (EV_P_ W *events, int eventcnt, int type)
272{
273 int i;
274
275 for (i = 0; i < eventcnt; ++i)
276 event (EV_A_ events [i], type);
277}
278
279static void
280fd_event (EV_P_ int fd, int events) 621fd_event (EV_P_ int fd, int revents)
281{ 622{
282 ANFD *anfd = anfds + fd; 623 ANFD *anfd = anfds + fd;
283 struct ev_io *w; 624 ev_io *w;
284 625
285 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)
286 { 627 {
287 int ev = w->events & events; 628 int ev = w->events & revents;
288 629
289 if (ev) 630 if (ev)
290 event (EV_A_ (W)w, ev); 631 ev_feed_event (EV_A_ (W)w, ev);
291 } 632 }
292} 633}
293 634
294/*****************************************************************************/ 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}
295 641
296static void 642void inline_size
297fd_reify (EV_P) 643fd_reify (EV_P)
298{ 644{
299 int i; 645 int i;
300 646
301 for (i = 0; i < fdchangecnt; ++i) 647 for (i = 0; i < fdchangecnt; ++i)
302 { 648 {
303 int fd = fdchanges [i]; 649 int fd = fdchanges [i];
304 ANFD *anfd = anfds + fd; 650 ANFD *anfd = anfds + fd;
305 struct ev_io *w; 651 ev_io *w;
306 652
307 int events = 0; 653 unsigned char events = 0;
308 654
309 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)
310 events |= w->events; 656 events |= (unsigned char)w->events;
311 657
658#if EV_SELECT_IS_WINSOCKET
659 if (events)
660 {
661 unsigned long argp;
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));
668 }
669#endif
670
671 {
672 unsigned char o_events = anfd->events;
673 unsigned char o_reify = anfd->reify;
674
312 anfd->reify = 0; 675 anfd->reify = 0;
313
314 method_modify (EV_A_ fd, anfd->events, events);
315 anfd->events = events; 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/*
765 * at the moment we allow libev the luxury of two heaps,
766 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
767 * which is more cache-efficient.
768 * the difference is about 5% with 50000+ watchers.
769 */
770#define USE_4HEAP !EV_MINIMAL
771#if USE_4HEAP
772
773#define HEAP0 3 /* index of first element in heap */
774
775/* towards the root */
776void inline_speed
391upheap (WT *heap, int k) 777upheap (WT *heap, int k)
392{ 778{
393 WT w = heap [k]; 779 WT w = heap [k];
394 780
395 while (k && heap [k >> 1]->at > w->at) 781 for (;;)
396 { 782 {
783 int p = ((k - HEAP0 - 1) / 4) + HEAP0;
784
785 if (p >= HEAP0 || heap [p]->at <= w->at)
786 break;
787
397 heap [k] = heap [k >> 1]; 788 heap [k] = heap [p];
398 ((W)heap [k])->active = k + 1; 789 ev_active (heap [k]) = k;
399 k >>= 1; 790 k = p;
400 } 791 }
401 792
402 heap [k] = w; 793 heap [k] = w;
403 ((W)heap [k])->active = k + 1; 794 ev_active (heap [k]) = k;
404
405} 795}
406 796
407static void 797/* away from the root */
798void inline_speed
408downheap (WT *heap, int N, int k) 799downheap (WT *heap, int N, int k)
409{ 800{
410 WT w = heap [k]; 801 WT w = heap [k];
802 WT *E = heap + N + HEAP0;
411 803
412 while (k < (N >> 1)) 804 for (;;)
413 { 805 {
414 int j = k << 1; 806 ev_tstamp minat;
807 WT *minpos;
808 WT *pos = heap + 4 * (k - HEAP0) + HEAP0;
415 809
416 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 810 // find minimum child
811 if (expect_true (pos +3 < E))
417 ++j; 812 {
813 (minpos = pos + 0), (minat = (*minpos)->at);
814 if (pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
815 if (pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
816 if (pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
817 }
818 else
819 {
820 if (pos >= E)
821 break;
418 822
823 (minpos = pos + 0), (minat = (*minpos)->at);
824 if (pos + 1 < E && pos [1]->at < minat) (minpos = pos + 1), (minat = (*minpos)->at);
825 if (pos + 2 < E && pos [2]->at < minat) (minpos = pos + 2), (minat = (*minpos)->at);
826 if (pos + 3 < E && pos [3]->at < minat) (minpos = pos + 3), (minat = (*minpos)->at);
827 }
828
419 if (w->at <= heap [j]->at) 829 if (w->at <= minat)
420 break; 830 break;
421 831
422 heap [k] = heap [j]; 832 ev_active (*minpos) = k;
423 ((W)heap [k])->active = k + 1; 833 heap [k] = *minpos;
424 k = j; 834
835 k = minpos - heap;
425 } 836 }
426 837
427 heap [k] = w; 838 heap [k] = w;
839 ev_active (heap [k]) = k;
840}
841
842#else // 4HEAP
843
844#define HEAP0 1
845
846/* towards the root */
847void inline_speed
848upheap (WT *heap, int k)
849{
850 WT w = heap [k];
851
852 for (;;)
853 {
854 int p = k >> 1;
855
856 /* maybe we could use a dummy element at heap [0]? */
857 if (!p || heap [p]->at <= w->at)
858 break;
859
860 heap [k] = heap [p];
861 ev_active (heap [k]) = k;
862 k = p;
863 }
864
865 heap [k] = w;
866 ev_active (heap [k]) = k;
867}
868
869/* away from the root */
870void inline_speed
871downheap (WT *heap, int N, int k)
872{
873 WT w = heap [k];
874
875 for (;;)
876 {
877 int c = k << 1;
878
879 if (c > N)
880 break;
881
882 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
883 ? 1 : 0;
884
885 if (w->at <= heap [c]->at)
886 break;
887
888 heap [k] = heap [c];
428 ((W)heap [k])->active = k + 1; 889 ((W)heap [k])->active = k;
890
891 k = c;
892 }
893
894 heap [k] = w;
895 ev_active (heap [k]) = k;
896}
897#endif
898
899void inline_size
900adjustheap (WT *heap, int N, int k)
901{
902 upheap (heap, k);
903 downheap (heap, N, k);
429} 904}
430 905
431/*****************************************************************************/ 906/*****************************************************************************/
432 907
433typedef struct 908typedef struct
434{ 909{
435 struct ev_watcher_list *head; 910 WL head;
436 sig_atomic_t volatile gotsig; 911 EV_ATOMIC_T gotsig;
437} ANSIG; 912} ANSIG;
438 913
439static ANSIG *signals; 914static ANSIG *signals;
440static int signalmax; 915static int signalmax;
441 916
442static int sigpipe [2]; 917static EV_ATOMIC_T gotsig;
443static sig_atomic_t volatile gotsig;
444static struct ev_io sigev;
445 918
446static void 919void inline_size
447signals_init (ANSIG *base, int count) 920signals_init (ANSIG *base, int count)
448{ 921{
449 while (count--) 922 while (count--)
450 { 923 {
451 base->head = 0; 924 base->head = 0;
… …
453 926
454 ++base; 927 ++base;
455 } 928 }
456} 929}
457 930
931/*****************************************************************************/
932
933void inline_speed
934fd_intern (int fd)
935{
936#ifdef _WIN32
937 int arg = 1;
938 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
939#else
940 fcntl (fd, F_SETFD, FD_CLOEXEC);
941 fcntl (fd, F_SETFL, O_NONBLOCK);
942#endif
943}
944
945static void noinline
946evpipe_init (EV_P)
947{
948 if (!ev_is_active (&pipeev))
949 {
950#if EV_USE_EVENTFD
951 if ((evfd = eventfd (0, 0)) >= 0)
952 {
953 evpipe [0] = -1;
954 fd_intern (evfd);
955 ev_io_set (&pipeev, evfd, EV_READ);
956 }
957 else
958#endif
959 {
960 while (pipe (evpipe))
961 syserr ("(libev) error creating signal/async pipe");
962
963 fd_intern (evpipe [0]);
964 fd_intern (evpipe [1]);
965 ev_io_set (&pipeev, evpipe [0], EV_READ);
966 }
967
968 ev_io_start (EV_A_ &pipeev);
969 ev_unref (EV_A); /* watcher should not keep loop alive */
970 }
971}
972
973void inline_size
974evpipe_write (EV_P_ EV_ATOMIC_T *flag)
975{
976 if (!*flag)
977 {
978 int old_errno = errno; /* save errno because write might clobber it */
979
980 *flag = 1;
981
982#if EV_USE_EVENTFD
983 if (evfd >= 0)
984 {
985 uint64_t counter = 1;
986 write (evfd, &counter, sizeof (uint64_t));
987 }
988 else
989#endif
990 write (evpipe [1], &old_errno, 1);
991
992 errno = old_errno;
993 }
994}
995
458static void 996static void
997pipecb (EV_P_ ev_io *iow, int revents)
998{
999#if EV_USE_EVENTFD
1000 if (evfd >= 0)
1001 {
1002 uint64_t counter;
1003 read (evfd, &counter, sizeof (uint64_t));
1004 }
1005 else
1006#endif
1007 {
1008 char dummy;
1009 read (evpipe [0], &dummy, 1);
1010 }
1011
1012 if (gotsig && ev_is_default_loop (EV_A))
1013 {
1014 int signum;
1015 gotsig = 0;
1016
1017 for (signum = signalmax; signum--; )
1018 if (signals [signum].gotsig)
1019 ev_feed_signal_event (EV_A_ signum + 1);
1020 }
1021
1022#if EV_ASYNC_ENABLE
1023 if (gotasync)
1024 {
1025 int i;
1026 gotasync = 0;
1027
1028 for (i = asynccnt; i--; )
1029 if (asyncs [i]->sent)
1030 {
1031 asyncs [i]->sent = 0;
1032 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1033 }
1034 }
1035#endif
1036}
1037
1038/*****************************************************************************/
1039
1040static void
459sighandler (int signum) 1041ev_sighandler (int signum)
460{ 1042{
1043#if EV_MULTIPLICITY
1044 struct ev_loop *loop = &default_loop_struct;
1045#endif
1046
1047#if _WIN32
1048 signal (signum, ev_sighandler);
1049#endif
1050
461 signals [signum - 1].gotsig = 1; 1051 signals [signum - 1].gotsig = 1;
462 1052 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} 1053}
471 1054
472static void 1055void noinline
473sigcb (EV_P_ struct ev_io *iow, int revents) 1056ev_feed_signal_event (EV_P_ int signum)
474{ 1057{
475 struct ev_watcher_list *w; 1058 WL w;
1059
1060#if EV_MULTIPLICITY
1061 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1062#endif
1063
476 int signum; 1064 --signum;
477 1065
478 read (sigpipe [0], &revents, 1); 1066 if (signum < 0 || signum >= signalmax)
479 gotsig = 0; 1067 return;
480 1068
481 for (signum = signalmax; signum--; )
482 if (signals [signum].gotsig)
483 {
484 signals [signum].gotsig = 0; 1069 signals [signum].gotsig = 0;
485 1070
486 for (w = signals [signum].head; w; w = w->next) 1071 for (w = signals [signum].head; w; w = w->next)
487 event (EV_A_ (W)w, EV_SIGNAL); 1072 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} 1073}
507 1074
508/*****************************************************************************/ 1075/*****************************************************************************/
509 1076
1077static WL childs [EV_PID_HASHSIZE];
1078
510#ifndef WIN32 1079#ifndef _WIN32
511 1080
512static struct ev_child *childs [PID_HASHSIZE];
513static struct ev_signal childev; 1081static ev_signal childev;
1082
1083#ifndef WIFCONTINUED
1084# define WIFCONTINUED(status) 0
1085#endif
1086
1087void inline_speed
1088child_reap (EV_P_ int chain, int pid, int status)
1089{
1090 ev_child *w;
1091 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1092
1093 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1094 {
1095 if ((w->pid == pid || !w->pid)
1096 && (!traced || (w->flags & 1)))
1097 {
1098 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1099 w->rpid = pid;
1100 w->rstatus = status;
1101 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1102 }
1103 }
1104}
514 1105
515#ifndef WCONTINUED 1106#ifndef WCONTINUED
516# define WCONTINUED 0 1107# define WCONTINUED 0
517#endif 1108#endif
518 1109
519static void 1110static 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 ev_priority (w) = ev_priority (sw); /* 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) 1111childcb (EV_P_ ev_signal *sw, int revents)
536{ 1112{
537 int pid, status; 1113 int pid, status;
538 1114
1115 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
539 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1116 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
540 { 1117 if (!WCONTINUED
1118 || errno != EINVAL
1119 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1120 return;
1121
541 /* make sure we are called again until all childs have been reaped */ 1122 /* make sure we are called again until all children have been reaped */
1123 /* we need to do it this way so that the callback gets called before we continue */
542 event (EV_A_ (W)sw, EV_SIGNAL); 1124 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
543 1125
544 child_reap (EV_A_ sw, pid, pid, status); 1126 child_reap (EV_A_ pid, pid, status);
1127 if (EV_PID_HASHSIZE > 1)
545 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 1128 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
546 }
547} 1129}
548 1130
549#endif 1131#endif
550 1132
551/*****************************************************************************/ 1133/*****************************************************************************/
552 1134
1135#if EV_USE_PORT
1136# include "ev_port.c"
1137#endif
553#if EV_USE_KQUEUE 1138#if EV_USE_KQUEUE
554# include "ev_kqueue.c" 1139# include "ev_kqueue.c"
555#endif 1140#endif
556#if EV_USE_EPOLL 1141#if EV_USE_EPOLL
557# include "ev_epoll.c" 1142# include "ev_epoll.c"
… …
574{ 1159{
575 return EV_VERSION_MINOR; 1160 return EV_VERSION_MINOR;
576} 1161}
577 1162
578/* return true if we are running with elevated privileges and should ignore env variables */ 1163/* return true if we are running with elevated privileges and should ignore env variables */
579static int 1164int inline_size
580enable_secure (void) 1165enable_secure (void)
581{ 1166{
582#ifdef WIN32 1167#ifdef _WIN32
583 return 0; 1168 return 0;
584#else 1169#else
585 return getuid () != geteuid () 1170 return getuid () != geteuid ()
586 || getgid () != getegid (); 1171 || getgid () != getegid ();
587#endif 1172#endif
588} 1173}
589 1174
590int 1175unsigned int
591ev_method (EV_P) 1176ev_supported_backends (void)
592{ 1177{
593 return method; 1178 unsigned int flags = 0;
594}
595 1179
596static void 1180 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
597loop_init (EV_P_ int methods) 1181 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1182 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1183 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1184 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1185
1186 return flags;
1187}
1188
1189unsigned int
1190ev_recommended_backends (void)
598{ 1191{
599 if (!method) 1192 unsigned int flags = ev_supported_backends ();
1193
1194#ifndef __NetBSD__
1195 /* kqueue is borked on everything but netbsd apparently */
1196 /* it usually doesn't work correctly on anything but sockets and pipes */
1197 flags &= ~EVBACKEND_KQUEUE;
1198#endif
1199#ifdef __APPLE__
1200 // flags &= ~EVBACKEND_KQUEUE; for documentation
1201 flags &= ~EVBACKEND_POLL;
1202#endif
1203
1204 return flags;
1205}
1206
1207unsigned int
1208ev_embeddable_backends (void)
1209{
1210 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1211
1212 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1213 /* please fix it and tell me how to detect the fix */
1214 flags &= ~EVBACKEND_EPOLL;
1215
1216 return flags;
1217}
1218
1219unsigned int
1220ev_backend (EV_P)
1221{
1222 return backend;
1223}
1224
1225unsigned int
1226ev_loop_count (EV_P)
1227{
1228 return loop_count;
1229}
1230
1231void
1232ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1233{
1234 io_blocktime = interval;
1235}
1236
1237void
1238ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1239{
1240 timeout_blocktime = interval;
1241}
1242
1243static void noinline
1244loop_init (EV_P_ unsigned int flags)
1245{
1246 if (!backend)
600 { 1247 {
601#if EV_USE_MONOTONIC 1248#if EV_USE_MONOTONIC
602 { 1249 {
603 struct timespec ts; 1250 struct timespec ts;
604 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1251 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
605 have_monotonic = 1; 1252 have_monotonic = 1;
606 } 1253 }
607#endif 1254#endif
608 1255
609 rt_now = ev_time (); 1256 ev_rt_now = ev_time ();
610 mn_now = get_clock (); 1257 mn_now = get_clock ();
611 now_floor = mn_now; 1258 now_floor = mn_now;
612 rtmn_diff = rt_now - mn_now; 1259 rtmn_diff = ev_rt_now - mn_now;
613 1260
614 if (methods == EVMETHOD_AUTO) 1261 io_blocktime = 0.;
615 if (!enable_secure () && getenv ("LIBEV_METHODS")) 1262 timeout_blocktime = 0.;
1263 backend = 0;
1264 backend_fd = -1;
1265 gotasync = 0;
1266#if EV_USE_INOTIFY
1267 fs_fd = -2;
1268#endif
1269
1270 /* pid check not overridable via env */
1271#ifndef _WIN32
1272 if (flags & EVFLAG_FORKCHECK)
1273 curpid = getpid ();
1274#endif
1275
1276 if (!(flags & EVFLAG_NOENV)
1277 && !enable_secure ()
1278 && getenv ("LIBEV_FLAGS"))
616 methods = atoi (getenv ("LIBEV_METHODS")); 1279 flags = atoi (getenv ("LIBEV_FLAGS"));
617 else
618 methods = EVMETHOD_ANY;
619 1280
620 method = 0; 1281 if (!(flags & 0x0000ffffU))
621#if EV_USE_WIN32 1282 flags |= ev_recommended_backends ();
622 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods); 1283
1284#if EV_USE_PORT
1285 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
623#endif 1286#endif
624#if EV_USE_KQUEUE 1287#if EV_USE_KQUEUE
625 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods); 1288 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
626#endif 1289#endif
627#if EV_USE_EPOLL 1290#if EV_USE_EPOLL
628 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods); 1291 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
629#endif 1292#endif
630#if EV_USE_POLL 1293#if EV_USE_POLL
631 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods); 1294 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
632#endif 1295#endif
633#if EV_USE_SELECT 1296#if EV_USE_SELECT
634 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods); 1297 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
635#endif 1298#endif
636 }
637}
638 1299
639void 1300 ev_init (&pipeev, pipecb);
1301 ev_set_priority (&pipeev, EV_MAXPRI);
1302 }
1303}
1304
1305static void noinline
640loop_destroy (EV_P) 1306loop_destroy (EV_P)
641{ 1307{
642 int i; 1308 int i;
643 1309
1310 if (ev_is_active (&pipeev))
1311 {
1312 ev_ref (EV_A); /* signal watcher */
1313 ev_io_stop (EV_A_ &pipeev);
1314
1315#if EV_USE_EVENTFD
1316 if (evfd >= 0)
1317 close (evfd);
1318#endif
1319
1320 if (evpipe [0] >= 0)
1321 {
1322 close (evpipe [0]);
1323 close (evpipe [1]);
1324 }
1325 }
1326
644#if EV_USE_WIN32 1327#if EV_USE_INOTIFY
645 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A); 1328 if (fs_fd >= 0)
1329 close (fs_fd);
1330#endif
1331
1332 if (backend_fd >= 0)
1333 close (backend_fd);
1334
1335#if EV_USE_PORT
1336 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
646#endif 1337#endif
647#if EV_USE_KQUEUE 1338#if EV_USE_KQUEUE
648 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 1339 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
649#endif 1340#endif
650#if EV_USE_EPOLL 1341#if EV_USE_EPOLL
651 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 1342 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
652#endif 1343#endif
653#if EV_USE_POLL 1344#if EV_USE_POLL
654 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 1345 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
655#endif 1346#endif
656#if EV_USE_SELECT 1347#if EV_USE_SELECT
657 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 1348 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
658#endif 1349#endif
659 1350
660 for (i = NUMPRI; i--; ) 1351 for (i = NUMPRI; i--; )
1352 {
661 array_free (pending, [i]); 1353 array_free (pending, [i]);
1354#if EV_IDLE_ENABLE
1355 array_free (idle, [i]);
1356#endif
1357 }
662 1358
1359 ev_free (anfds); anfdmax = 0;
1360
1361 /* have to use the microsoft-never-gets-it-right macro */
663 array_free (fdchange, ); 1362 array_free (fdchange, EMPTY);
664 array_free (timer, ); 1363 array_free (timer, EMPTY);
1364#if EV_PERIODIC_ENABLE
665 array_free (periodic, ); 1365 array_free (periodic, EMPTY);
666 array_free (idle, ); 1366#endif
1367#if EV_FORK_ENABLE
1368 array_free (fork, EMPTY);
1369#endif
667 array_free (prepare, ); 1370 array_free (prepare, EMPTY);
668 array_free (check, ); 1371 array_free (check, EMPTY);
1372#if EV_ASYNC_ENABLE
1373 array_free (async, EMPTY);
1374#endif
669 1375
670 method = 0; 1376 backend = 0;
671 /*TODO*/
672} 1377}
673 1378
674void 1379#if EV_USE_INOTIFY
1380void inline_size infy_fork (EV_P);
1381#endif
1382
1383void inline_size
675loop_fork (EV_P) 1384loop_fork (EV_P)
676{ 1385{
677 /*TODO*/ 1386#if EV_USE_PORT
1387 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1388#endif
1389#if EV_USE_KQUEUE
1390 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1391#endif
678#if EV_USE_EPOLL 1392#if EV_USE_EPOLL
679 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 1393 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
680#endif 1394#endif
681#if EV_USE_KQUEUE 1395#if EV_USE_INOTIFY
682 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 1396 infy_fork (EV_A);
683#endif 1397#endif
1398
1399 if (ev_is_active (&pipeev))
1400 {
1401 /* this "locks" the handlers against writing to the pipe */
1402 /* while we modify the fd vars */
1403 gotsig = 1;
1404#if EV_ASYNC_ENABLE
1405 gotasync = 1;
1406#endif
1407
1408 ev_ref (EV_A);
1409 ev_io_stop (EV_A_ &pipeev);
1410
1411#if EV_USE_EVENTFD
1412 if (evfd >= 0)
1413 close (evfd);
1414#endif
1415
1416 if (evpipe [0] >= 0)
1417 {
1418 close (evpipe [0]);
1419 close (evpipe [1]);
1420 }
1421
1422 evpipe_init (EV_A);
1423 /* now iterate over everything, in case we missed something */
1424 pipecb (EV_A_ &pipeev, EV_READ);
1425 }
1426
1427 postfork = 0;
684} 1428}
685 1429
686#if EV_MULTIPLICITY 1430#if EV_MULTIPLICITY
687struct ev_loop * 1431struct ev_loop *
688ev_loop_new (int methods) 1432ev_loop_new (unsigned int flags)
689{ 1433{
690 struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop)); 1434 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
691 1435
1436 memset (loop, 0, sizeof (struct ev_loop));
1437
692 loop_init (EV_A_ methods); 1438 loop_init (EV_A_ flags);
693 1439
694 if (ev_method (EV_A)) 1440 if (ev_backend (EV_A))
695 return loop; 1441 return loop;
696 1442
697 return 0; 1443 return 0;
698} 1444}
699 1445
700void 1446void
701ev_loop_destroy (EV_P) 1447ev_loop_destroy (EV_P)
702{ 1448{
703 loop_destroy (EV_A); 1449 loop_destroy (EV_A);
704 free (loop); 1450 ev_free (loop);
705} 1451}
706 1452
707void 1453void
708ev_loop_fork (EV_P) 1454ev_loop_fork (EV_P)
709{ 1455{
710 loop_fork (EV_A); 1456 postfork = 1; /* must be in line with ev_default_fork */
711} 1457}
712
713#endif 1458#endif
714 1459
715#if EV_MULTIPLICITY 1460#if EV_MULTIPLICITY
716struct ev_loop default_loop_struct;
717static struct ev_loop *default_loop;
718
719struct ev_loop * 1461struct ev_loop *
1462ev_default_loop_init (unsigned int flags)
720#else 1463#else
721static int default_loop;
722
723int 1464int
1465ev_default_loop (unsigned int flags)
724#endif 1466#endif
725ev_default_loop (int methods)
726{ 1467{
727 if (sigpipe [0] == sigpipe [1])
728 if (pipe (sigpipe))
729 return 0;
730
731 if (!default_loop) 1468 if (!ev_default_loop_ptr)
732 { 1469 {
733#if EV_MULTIPLICITY 1470#if EV_MULTIPLICITY
734 struct ev_loop *loop = default_loop = &default_loop_struct; 1471 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
735#else 1472#else
736 default_loop = 1; 1473 ev_default_loop_ptr = 1;
737#endif 1474#endif
738 1475
739 loop_init (EV_A_ methods); 1476 loop_init (EV_A_ flags);
740 1477
741 if (ev_method (EV_A)) 1478 if (ev_backend (EV_A))
742 { 1479 {
743 ev_watcher_init (&sigev, sigcb);
744 ev_set_priority (&sigev, EV_MAXPRI);
745 siginit (EV_A);
746
747#ifndef WIN32 1480#ifndef _WIN32
748 ev_signal_init (&childev, childcb, SIGCHLD); 1481 ev_signal_init (&childev, childcb, SIGCHLD);
749 ev_set_priority (&childev, EV_MAXPRI); 1482 ev_set_priority (&childev, EV_MAXPRI);
750 ev_signal_start (EV_A_ &childev); 1483 ev_signal_start (EV_A_ &childev);
751 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1484 ev_unref (EV_A); /* child watcher should not keep loop alive */
752#endif 1485#endif
753 } 1486 }
754 else 1487 else
755 default_loop = 0; 1488 ev_default_loop_ptr = 0;
756 } 1489 }
757 1490
758 return default_loop; 1491 return ev_default_loop_ptr;
759} 1492}
760 1493
761void 1494void
762ev_default_destroy (void) 1495ev_default_destroy (void)
763{ 1496{
764#if EV_MULTIPLICITY 1497#if EV_MULTIPLICITY
765 struct ev_loop *loop = default_loop; 1498 struct ev_loop *loop = ev_default_loop_ptr;
766#endif 1499#endif
767 1500
1501#ifndef _WIN32
768 ev_ref (EV_A); /* child watcher */ 1502 ev_ref (EV_A); /* child watcher */
769 ev_signal_stop (EV_A_ &childev); 1503 ev_signal_stop (EV_A_ &childev);
770 1504#endif
771 ev_ref (EV_A); /* signal watcher */
772 ev_io_stop (EV_A_ &sigev);
773
774 close (sigpipe [0]); sigpipe [0] = 0;
775 close (sigpipe [1]); sigpipe [1] = 0;
776 1505
777 loop_destroy (EV_A); 1506 loop_destroy (EV_A);
778} 1507}
779 1508
780void 1509void
781ev_default_fork (void) 1510ev_default_fork (void)
782{ 1511{
783#if EV_MULTIPLICITY 1512#if EV_MULTIPLICITY
784 struct ev_loop *loop = default_loop; 1513 struct ev_loop *loop = ev_default_loop_ptr;
785#endif 1514#endif
786 1515
787 loop_fork (EV_A); 1516 if (backend)
788 1517 postfork = 1; /* must be in line with ev_loop_fork */
789 ev_io_stop (EV_A_ &sigev);
790 close (sigpipe [0]);
791 close (sigpipe [1]);
792 pipe (sigpipe);
793
794 ev_ref (EV_A); /* signal watcher */
795 siginit (EV_A);
796} 1518}
797 1519
798/*****************************************************************************/ 1520/*****************************************************************************/
799 1521
800static void 1522void
1523ev_invoke (EV_P_ void *w, int revents)
1524{
1525 EV_CB_INVOKE ((W)w, revents);
1526}
1527
1528void inline_speed
801call_pending (EV_P) 1529call_pending (EV_P)
802{ 1530{
803 int pri; 1531 int pri;
804 1532
805 for (pri = NUMPRI; pri--; ) 1533 for (pri = NUMPRI; pri--; )
806 while (pendingcnt [pri]) 1534 while (pendingcnt [pri])
807 { 1535 {
808 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1536 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
809 1537
810 if (p->w) 1538 if (expect_true (p->w))
811 { 1539 {
1540 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1541
812 p->w->pending = 0; 1542 p->w->pending = 0;
813 1543 EV_CB_INVOKE (p->w, p->events);
814 ((void (*)(EV_P_ W, int))p->w->cb) (EV_A_ p->w, p->events);
815 } 1544 }
816 } 1545 }
817} 1546}
818 1547
819static void 1548#if EV_IDLE_ENABLE
1549void inline_size
1550idle_reify (EV_P)
1551{
1552 if (expect_false (idleall))
1553 {
1554 int pri;
1555
1556 for (pri = NUMPRI; pri--; )
1557 {
1558 if (pendingcnt [pri])
1559 break;
1560
1561 if (idlecnt [pri])
1562 {
1563 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1564 break;
1565 }
1566 }
1567 }
1568}
1569#endif
1570
1571void inline_size
820timers_reify (EV_P) 1572timers_reify (EV_P)
821{ 1573{
822 while (timercnt && ((WT)timers [0])->at <= mn_now) 1574 while (timercnt && ev_at (timers [HEAP0]) <= mn_now)
823 { 1575 {
824 struct ev_timer *w = timers [0]; 1576 ev_timer *w = (ev_timer *)timers [HEAP0];
825 1577
826 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1578 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
827 1579
828 /* first reschedule or stop timer */ 1580 /* first reschedule or stop timer */
829 if (w->repeat) 1581 if (w->repeat)
830 { 1582 {
831 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1583 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
832 ((WT)w)->at = mn_now + w->repeat; 1584
1585 ev_at (w) += w->repeat;
1586 if (ev_at (w) < mn_now)
1587 ev_at (w) = mn_now;
1588
833 downheap ((WT *)timers, timercnt, 0); 1589 downheap (timers, timercnt, HEAP0);
834 } 1590 }
835 else 1591 else
836 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1592 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
837 1593
838 event (EV_A_ (W)w, EV_TIMEOUT); 1594 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
839 } 1595 }
840} 1596}
841 1597
842static void 1598#if EV_PERIODIC_ENABLE
1599void inline_size
843periodics_reify (EV_P) 1600periodics_reify (EV_P)
844{ 1601{
845 while (periodiccnt && ((WT)periodics [0])->at <= rt_now) 1602 while (periodiccnt && ev_at (periodics [HEAP0]) <= ev_rt_now)
846 { 1603 {
847 struct ev_periodic *w = periodics [0]; 1604 ev_periodic *w = (ev_periodic *)periodics [HEAP0];
848 1605
849 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1606 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
850 1607
851 /* first reschedule or stop timer */ 1608 /* first reschedule or stop timer */
852 if (w->interval) 1609 if (w->reschedule_cb)
853 { 1610 {
854 ((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; 1611 ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
855 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now)); 1612 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
856 downheap ((WT *)periodics, periodiccnt, 0); 1613 downheap (periodics, periodiccnt, 1);
1614 }
1615 else if (w->interval)
1616 {
1617 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1618 if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
1619 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
1620 downheap (periodics, periodiccnt, HEAP0);
857 } 1621 }
858 else 1622 else
859 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1623 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
860 1624
861 event (EV_A_ (W)w, EV_PERIODIC); 1625 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
862 } 1626 }
863} 1627}
864 1628
865static void 1629static void noinline
866periodics_reschedule (EV_P) 1630periodics_reschedule (EV_P)
867{ 1631{
868 int i; 1632 int i;
869 1633
870 /* adjust periodics after time jump */ 1634 /* adjust periodics after time jump */
871 for (i = 0; i < periodiccnt; ++i) 1635 for (i = 1; i <= periodiccnt; ++i)
872 { 1636 {
873 struct ev_periodic *w = periodics [i]; 1637 ev_periodic *w = (ev_periodic *)periodics [i];
874 1638
1639 if (w->reschedule_cb)
1640 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
875 if (w->interval) 1641 else if (w->interval)
876 {
877 ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; 1642 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
878
879 if (fabs (diff) >= 1e-4)
880 {
881 ev_periodic_stop (EV_A_ w);
882 ev_periodic_start (EV_A_ w);
883
884 i = 0; /* restart loop, inefficient, but time jumps should be rare */
885 }
886 }
887 }
888}
889
890inline int
891time_update_monotonic (EV_P)
892{
893 mn_now = get_clock ();
894
895 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
896 { 1643 }
897 rt_now = rtmn_diff + mn_now;
898 return 0;
899 }
900 else
901 {
902 now_floor = mn_now;
903 rt_now = ev_time ();
904 return 1;
905 }
906}
907 1644
908static void 1645 /* now rebuild the heap */
909time_update (EV_P) 1646 for (i = periodiccnt >> 1; --i; )
1647 downheap (periodics, periodiccnt, i + HEAP0);
1648}
1649#endif
1650
1651void inline_speed
1652time_update (EV_P_ ev_tstamp max_block)
910{ 1653{
911 int i; 1654 int i;
912 1655
913#if EV_USE_MONOTONIC 1656#if EV_USE_MONOTONIC
914 if (expect_true (have_monotonic)) 1657 if (expect_true (have_monotonic))
915 { 1658 {
916 if (time_update_monotonic (EV_A)) 1659 ev_tstamp odiff = rtmn_diff;
1660
1661 mn_now = get_clock ();
1662
1663 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1664 /* interpolate in the meantime */
1665 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
917 { 1666 {
918 ev_tstamp odiff = rtmn_diff; 1667 ev_rt_now = rtmn_diff + mn_now;
1668 return;
1669 }
919 1670
1671 now_floor = mn_now;
1672 ev_rt_now = ev_time ();
1673
920 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 1674 /* loop a few times, before making important decisions.
1675 * on the choice of "4": one iteration isn't enough,
1676 * in case we get preempted during the calls to
1677 * ev_time and get_clock. a second call is almost guaranteed
1678 * to succeed in that case, though. and looping a few more times
1679 * doesn't hurt either as we only do this on time-jumps or
1680 * in the unlikely event of having been preempted here.
1681 */
1682 for (i = 4; --i; )
921 { 1683 {
922 rtmn_diff = rt_now - mn_now; 1684 rtmn_diff = ev_rt_now - mn_now;
923 1685
924 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1686 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
925 return; /* all is well */ 1687 return; /* all is well */
926 1688
927 rt_now = ev_time (); 1689 ev_rt_now = ev_time ();
928 mn_now = get_clock (); 1690 mn_now = get_clock ();
929 now_floor = mn_now; 1691 now_floor = mn_now;
930 } 1692 }
931 1693
1694# if EV_PERIODIC_ENABLE
1695 periodics_reschedule (EV_A);
1696# endif
1697 /* no timer adjustment, as the monotonic clock doesn't jump */
1698 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1699 }
1700 else
1701#endif
1702 {
1703 ev_rt_now = ev_time ();
1704
1705 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1706 {
1707#if EV_PERIODIC_ENABLE
932 periodics_reschedule (EV_A); 1708 periodics_reschedule (EV_A);
933 /* no timer adjustment, as the monotonic clock doesn't jump */ 1709#endif
934 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */ 1710 /* adjust timers. this is easy, as the offset is the same for all of them */
1711 for (i = 1; i <= timercnt; ++i)
1712 ev_at (timers [i]) += ev_rt_now - mn_now;
935 } 1713 }
936 }
937 else
938#endif
939 {
940 rt_now = ev_time ();
941 1714
942 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
943 {
944 periodics_reschedule (EV_A);
945
946 /* adjust timers. this is easy, as the offset is the same for all */
947 for (i = 0; i < timercnt; ++i)
948 ((WT)timers [i])->at += rt_now - mn_now;
949 }
950
951 mn_now = rt_now; 1715 mn_now = ev_rt_now;
952 } 1716 }
953} 1717}
954 1718
955void 1719void
956ev_ref (EV_P) 1720ev_ref (EV_P)
… …
967static int loop_done; 1731static int loop_done;
968 1732
969void 1733void
970ev_loop (EV_P_ int flags) 1734ev_loop (EV_P_ int flags)
971{ 1735{
972 double block; 1736 loop_done = EVUNLOOP_CANCEL;
973 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 1737
1738 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
974 1739
975 do 1740 do
976 { 1741 {
1742#ifndef _WIN32
1743 if (expect_false (curpid)) /* penalise the forking check even more */
1744 if (expect_false (getpid () != curpid))
1745 {
1746 curpid = getpid ();
1747 postfork = 1;
1748 }
1749#endif
1750
1751#if EV_FORK_ENABLE
1752 /* we might have forked, so queue fork handlers */
1753 if (expect_false (postfork))
1754 if (forkcnt)
1755 {
1756 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1757 call_pending (EV_A);
1758 }
1759#endif
1760
977 /* queue check watchers (and execute them) */ 1761 /* queue prepare watchers (and execute them) */
978 if (expect_false (preparecnt)) 1762 if (expect_false (preparecnt))
979 { 1763 {
980 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1764 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
981 call_pending (EV_A); 1765 call_pending (EV_A);
982 } 1766 }
983 1767
1768 if (expect_false (!activecnt))
1769 break;
1770
1771 /* we might have forked, so reify kernel state if necessary */
1772 if (expect_false (postfork))
1773 loop_fork (EV_A);
1774
984 /* update fd-related kernel structures */ 1775 /* update fd-related kernel structures */
985 fd_reify (EV_A); 1776 fd_reify (EV_A);
986 1777
987 /* calculate blocking time */ 1778 /* calculate blocking time */
1779 {
1780 ev_tstamp waittime = 0.;
1781 ev_tstamp sleeptime = 0.;
988 1782
989 /* we only need this for !monotonic clockor timers, but as we basically 1783 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
990 always have timers, we just calculate it always */
991#if EV_USE_MONOTONIC
992 if (expect_true (have_monotonic))
993 time_update_monotonic (EV_A);
994 else
995#endif
996 { 1784 {
997 rt_now = ev_time (); 1785 /* update time to cancel out callback processing overhead */
998 mn_now = rt_now; 1786 time_update (EV_A_ 1e100);
999 }
1000 1787
1001 if (flags & EVLOOP_NONBLOCK || idlecnt)
1002 block = 0.;
1003 else
1004 {
1005 block = MAX_BLOCKTIME; 1788 waittime = MAX_BLOCKTIME;
1006 1789
1007 if (timercnt) 1790 if (timercnt)
1008 { 1791 {
1009 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 1792 ev_tstamp to = ev_at (timers [HEAP0]) - mn_now + backend_fudge;
1010 if (block > to) block = to; 1793 if (waittime > to) waittime = to;
1011 } 1794 }
1012 1795
1796#if EV_PERIODIC_ENABLE
1013 if (periodiccnt) 1797 if (periodiccnt)
1014 { 1798 {
1015 ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge; 1799 ev_tstamp to = ev_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1016 if (block > to) block = to; 1800 if (waittime > to) waittime = to;
1017 } 1801 }
1802#endif
1018 1803
1019 if (block < 0.) block = 0.; 1804 if (expect_false (waittime < timeout_blocktime))
1805 waittime = timeout_blocktime;
1806
1807 sleeptime = waittime - backend_fudge;
1808
1809 if (expect_true (sleeptime > io_blocktime))
1810 sleeptime = io_blocktime;
1811
1812 if (sleeptime)
1813 {
1814 ev_sleep (sleeptime);
1815 waittime -= sleeptime;
1816 }
1020 } 1817 }
1021 1818
1022 method_poll (EV_A_ block); 1819 ++loop_count;
1820 backend_poll (EV_A_ waittime);
1023 1821
1024 /* update rt_now, do magic */ 1822 /* update ev_rt_now, do magic */
1025 time_update (EV_A); 1823 time_update (EV_A_ waittime + sleeptime);
1824 }
1026 1825
1027 /* queue pending timers and reschedule them */ 1826 /* queue pending timers and reschedule them */
1028 timers_reify (EV_A); /* relative timers called last */ 1827 timers_reify (EV_A); /* relative timers called last */
1828#if EV_PERIODIC_ENABLE
1029 periodics_reify (EV_A); /* absolute timers called first */ 1829 periodics_reify (EV_A); /* absolute timers called first */
1830#endif
1030 1831
1832#if EV_IDLE_ENABLE
1031 /* queue idle watchers unless io or timers are pending */ 1833 /* queue idle watchers unless other events are pending */
1032 if (!pendingcnt) 1834 idle_reify (EV_A);
1033 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 1835#endif
1034 1836
1035 /* queue check watchers, to be executed first */ 1837 /* queue check watchers, to be executed first */
1036 if (checkcnt) 1838 if (expect_false (checkcnt))
1037 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 1839 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1038 1840
1039 call_pending (EV_A); 1841 call_pending (EV_A);
1040 } 1842 }
1041 while (activecnt && !loop_done); 1843 while (expect_true (
1844 activecnt
1845 && !loop_done
1846 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1847 ));
1042 1848
1043 if (loop_done != 2) 1849 if (loop_done == EVUNLOOP_ONE)
1044 loop_done = 0; 1850 loop_done = EVUNLOOP_CANCEL;
1045} 1851}
1046 1852
1047void 1853void
1048ev_unloop (EV_P_ int how) 1854ev_unloop (EV_P_ int how)
1049{ 1855{
1050 loop_done = how; 1856 loop_done = how;
1051} 1857}
1052 1858
1053/*****************************************************************************/ 1859/*****************************************************************************/
1054 1860
1055inline void 1861void inline_size
1056wlist_add (WL *head, WL elem) 1862wlist_add (WL *head, WL elem)
1057{ 1863{
1058 elem->next = *head; 1864 elem->next = *head;
1059 *head = elem; 1865 *head = elem;
1060} 1866}
1061 1867
1062inline void 1868void inline_size
1063wlist_del (WL *head, WL elem) 1869wlist_del (WL *head, WL elem)
1064{ 1870{
1065 while (*head) 1871 while (*head)
1066 { 1872 {
1067 if (*head == elem) 1873 if (*head == elem)
… …
1072 1878
1073 head = &(*head)->next; 1879 head = &(*head)->next;
1074 } 1880 }
1075} 1881}
1076 1882
1077inline void 1883void inline_speed
1078ev_clear_pending (EV_P_ W w) 1884clear_pending (EV_P_ W w)
1079{ 1885{
1080 if (w->pending) 1886 if (w->pending)
1081 { 1887 {
1082 pendings [ABSPRI (w)][w->pending - 1].w = 0; 1888 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1083 w->pending = 0; 1889 w->pending = 0;
1084 } 1890 }
1085} 1891}
1086 1892
1087inline void 1893int
1894ev_clear_pending (EV_P_ void *w)
1895{
1896 W w_ = (W)w;
1897 int pending = w_->pending;
1898
1899 if (expect_true (pending))
1900 {
1901 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1902 w_->pending = 0;
1903 p->w = 0;
1904 return p->events;
1905 }
1906 else
1907 return 0;
1908}
1909
1910void inline_size
1911pri_adjust (EV_P_ W w)
1912{
1913 int pri = w->priority;
1914 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1915 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1916 w->priority = pri;
1917}
1918
1919void inline_speed
1088ev_start (EV_P_ W w, int active) 1920ev_start (EV_P_ W w, int active)
1089{ 1921{
1090 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 1922 pri_adjust (EV_A_ w);
1091 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1092
1093 w->active = active; 1923 w->active = active;
1094 ev_ref (EV_A); 1924 ev_ref (EV_A);
1095} 1925}
1096 1926
1097inline void 1927void inline_size
1098ev_stop (EV_P_ W w) 1928ev_stop (EV_P_ W w)
1099{ 1929{
1100 ev_unref (EV_A); 1930 ev_unref (EV_A);
1101 w->active = 0; 1931 w->active = 0;
1102} 1932}
1103 1933
1104/*****************************************************************************/ 1934/*****************************************************************************/
1105 1935
1106void 1936void noinline
1107ev_io_start (EV_P_ struct ev_io *w) 1937ev_io_start (EV_P_ ev_io *w)
1108{ 1938{
1109 int fd = w->fd; 1939 int fd = w->fd;
1110 1940
1111 if (ev_is_active (w)) 1941 if (expect_false (ev_is_active (w)))
1112 return; 1942 return;
1113 1943
1114 assert (("ev_io_start called with negative fd", fd >= 0)); 1944 assert (("ev_io_start called with negative fd", fd >= 0));
1115 1945
1116 ev_start (EV_A_ (W)w, 1); 1946 ev_start (EV_A_ (W)w, 1);
1117 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 1947 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1118 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1948 wlist_add (&anfds[fd].head, (WL)w);
1119 1949
1120 fd_change (EV_A_ fd); 1950 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1951 w->events &= ~EV_IOFDSET;
1121} 1952}
1122 1953
1123void 1954void noinline
1124ev_io_stop (EV_P_ struct ev_io *w) 1955ev_io_stop (EV_P_ ev_io *w)
1125{ 1956{
1126 ev_clear_pending (EV_A_ (W)w); 1957 clear_pending (EV_A_ (W)w);
1127 if (!ev_is_active (w)) 1958 if (expect_false (!ev_is_active (w)))
1128 return; 1959 return;
1129 1960
1961 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1962
1130 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1963 wlist_del (&anfds[w->fd].head, (WL)w);
1131 ev_stop (EV_A_ (W)w); 1964 ev_stop (EV_A_ (W)w);
1132 1965
1133 fd_change (EV_A_ w->fd); 1966 fd_change (EV_A_ w->fd, 1);
1134} 1967}
1135 1968
1136void 1969void noinline
1137ev_timer_start (EV_P_ struct ev_timer *w) 1970ev_timer_start (EV_P_ ev_timer *w)
1138{ 1971{
1139 if (ev_is_active (w)) 1972 if (expect_false (ev_is_active (w)))
1140 return; 1973 return;
1141 1974
1142 ((WT)w)->at += mn_now; 1975 ev_at (w) += mn_now;
1143 1976
1144 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 1977 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1145 1978
1146 ev_start (EV_A_ (W)w, ++timercnt); 1979 ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
1147 array_needsize (timers, timermax, timercnt, ); 1980 array_needsize (WT, timers, timermax, timercnt + HEAP0, EMPTY2);
1148 timers [timercnt - 1] = w; 1981 timers [ev_active (w)] = (WT)w;
1149 upheap ((WT *)timers, timercnt - 1); 1982 upheap (timers, ev_active (w));
1150 1983
1151 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 1984 /*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
1152} 1985}
1153 1986
1154void 1987void noinline
1155ev_timer_stop (EV_P_ struct ev_timer *w) 1988ev_timer_stop (EV_P_ ev_timer *w)
1156{ 1989{
1157 ev_clear_pending (EV_A_ (W)w); 1990 clear_pending (EV_A_ (W)w);
1158 if (!ev_is_active (w)) 1991 if (expect_false (!ev_is_active (w)))
1159 return; 1992 return;
1160 1993
1994 {
1995 int active = ev_active (w);
1996
1161 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 1997 assert (("internal timer heap corruption", timers [active] == (WT)w));
1162 1998
1163 if (((W)w)->active < timercnt--) 1999 if (expect_true (active < timercnt + HEAP0 - 1))
1164 { 2000 {
1165 timers [((W)w)->active - 1] = timers [timercnt]; 2001 timers [active] = timers [timercnt + HEAP0 - 1];
1166 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2002 adjustheap (timers, timercnt, active);
1167 } 2003 }
1168 2004
1169 ((WT)w)->at = w->repeat; 2005 --timercnt;
2006 }
2007
2008 ev_at (w) -= mn_now;
1170 2009
1171 ev_stop (EV_A_ (W)w); 2010 ev_stop (EV_A_ (W)w);
1172} 2011}
1173 2012
1174void 2013void noinline
1175ev_timer_again (EV_P_ struct ev_timer *w) 2014ev_timer_again (EV_P_ ev_timer *w)
1176{ 2015{
1177 if (ev_is_active (w)) 2016 if (ev_is_active (w))
1178 { 2017 {
1179 if (w->repeat) 2018 if (w->repeat)
1180 { 2019 {
1181 ((WT)w)->at = mn_now + w->repeat; 2020 ev_at (w) = mn_now + w->repeat;
1182 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2021 adjustheap (timers, timercnt, ev_active (w));
1183 } 2022 }
1184 else 2023 else
1185 ev_timer_stop (EV_A_ w); 2024 ev_timer_stop (EV_A_ w);
1186 } 2025 }
1187 else if (w->repeat) 2026 else if (w->repeat)
2027 {
2028 ev_at (w) = w->repeat;
1188 ev_timer_start (EV_A_ w); 2029 ev_timer_start (EV_A_ w);
2030 }
1189} 2031}
1190 2032
1191void 2033#if EV_PERIODIC_ENABLE
2034void noinline
1192ev_periodic_start (EV_P_ struct ev_periodic *w) 2035ev_periodic_start (EV_P_ ev_periodic *w)
1193{ 2036{
1194 if (ev_is_active (w)) 2037 if (expect_false (ev_is_active (w)))
1195 return; 2038 return;
1196 2039
2040 if (w->reschedule_cb)
2041 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2042 else if (w->interval)
2043 {
1197 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2044 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1198
1199 /* this formula differs from the one in periodic_reify because we do not always round up */ 2045 /* this formula differs from the one in periodic_reify because we do not always round up */
1200 if (w->interval)
1201 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval; 2046 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2047 }
2048 else
2049 ev_at (w) = w->offset;
1202 2050
1203 ev_start (EV_A_ (W)w, ++periodiccnt); 2051 ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1204 array_needsize (periodics, periodicmax, periodiccnt, ); 2052 array_needsize (WT, periodics, periodicmax, periodiccnt + HEAP0, EMPTY2);
1205 periodics [periodiccnt - 1] = w; 2053 periodics [ev_active (w)] = (WT)w;
1206 upheap ((WT *)periodics, periodiccnt - 1); 2054 upheap (periodics, ev_active (w));
1207 2055
1208 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2056 /*assert (("internal periodic heap corruption", periodics [ev_active (w)] == w));*/
1209} 2057}
1210 2058
1211void 2059void noinline
1212ev_periodic_stop (EV_P_ struct ev_periodic *w) 2060ev_periodic_stop (EV_P_ ev_periodic *w)
1213{ 2061{
1214 ev_clear_pending (EV_A_ (W)w); 2062 clear_pending (EV_A_ (W)w);
1215 if (!ev_is_active (w)) 2063 if (expect_false (!ev_is_active (w)))
1216 return; 2064 return;
1217 2065
2066 {
2067 int active = ev_active (w);
2068
1218 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2069 assert (("internal periodic heap corruption", periodics [active] == (WT)w));
1219 2070
1220 if (((W)w)->active < periodiccnt--) 2071 if (expect_true (active < periodiccnt + HEAP0 - 1))
1221 { 2072 {
1222 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2073 periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1223 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2074 adjustheap (periodics, periodiccnt, active);
1224 } 2075 }
2076
2077 --periodiccnt;
2078 }
1225 2079
1226 ev_stop (EV_A_ (W)w); 2080 ev_stop (EV_A_ (W)w);
1227} 2081}
1228 2082
1229void 2083void noinline
1230ev_idle_start (EV_P_ struct ev_idle *w) 2084ev_periodic_again (EV_P_ ev_periodic *w)
1231{ 2085{
1232 if (ev_is_active (w)) 2086 /* TODO: use adjustheap and recalculation */
1233 return;
1234
1235 ev_start (EV_A_ (W)w, ++idlecnt);
1236 array_needsize (idles, idlemax, idlecnt, );
1237 idles [idlecnt - 1] = w;
1238}
1239
1240void
1241ev_idle_stop (EV_P_ struct ev_idle *w)
1242{
1243 ev_clear_pending (EV_A_ (W)w);
1244 if (ev_is_active (w))
1245 return;
1246
1247 idles [((W)w)->active - 1] = idles [--idlecnt];
1248 ev_stop (EV_A_ (W)w); 2087 ev_periodic_stop (EV_A_ w);
2088 ev_periodic_start (EV_A_ w);
1249} 2089}
1250 2090#endif
1251void
1252ev_prepare_start (EV_P_ struct ev_prepare *w)
1253{
1254 if (ev_is_active (w))
1255 return;
1256
1257 ev_start (EV_A_ (W)w, ++preparecnt);
1258 array_needsize (prepares, preparemax, preparecnt, );
1259 prepares [preparecnt - 1] = w;
1260}
1261
1262void
1263ev_prepare_stop (EV_P_ struct ev_prepare *w)
1264{
1265 ev_clear_pending (EV_A_ (W)w);
1266 if (ev_is_active (w))
1267 return;
1268
1269 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1270 ev_stop (EV_A_ (W)w);
1271}
1272
1273void
1274ev_check_start (EV_P_ struct ev_check *w)
1275{
1276 if (ev_is_active (w))
1277 return;
1278
1279 ev_start (EV_A_ (W)w, ++checkcnt);
1280 array_needsize (checks, checkmax, checkcnt, );
1281 checks [checkcnt - 1] = w;
1282}
1283
1284void
1285ev_check_stop (EV_P_ struct ev_check *w)
1286{
1287 ev_clear_pending (EV_A_ (W)w);
1288 if (ev_is_active (w))
1289 return;
1290
1291 checks [((W)w)->active - 1] = checks [--checkcnt];
1292 ev_stop (EV_A_ (W)w);
1293}
1294 2091
1295#ifndef SA_RESTART 2092#ifndef SA_RESTART
1296# define SA_RESTART 0 2093# define SA_RESTART 0
1297#endif 2094#endif
1298 2095
1299void 2096void noinline
1300ev_signal_start (EV_P_ struct ev_signal *w) 2097ev_signal_start (EV_P_ ev_signal *w)
1301{ 2098{
1302#if EV_MULTIPLICITY 2099#if EV_MULTIPLICITY
1303 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 2100 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1304#endif 2101#endif
1305 if (ev_is_active (w)) 2102 if (expect_false (ev_is_active (w)))
1306 return; 2103 return;
1307 2104
1308 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2105 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1309 2106
2107 evpipe_init (EV_A);
2108
2109 {
2110#ifndef _WIN32
2111 sigset_t full, prev;
2112 sigfillset (&full);
2113 sigprocmask (SIG_SETMASK, &full, &prev);
2114#endif
2115
2116 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2117
2118#ifndef _WIN32
2119 sigprocmask (SIG_SETMASK, &prev, 0);
2120#endif
2121 }
2122
1310 ev_start (EV_A_ (W)w, 1); 2123 ev_start (EV_A_ (W)w, 1);
1311 array_needsize (signals, signalmax, w->signum, signals_init);
1312 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2124 wlist_add (&signals [w->signum - 1].head, (WL)w);
1313 2125
1314 if (!((WL)w)->next) 2126 if (!((WL)w)->next)
1315 { 2127 {
2128#if _WIN32
2129 signal (w->signum, ev_sighandler);
2130#else
1316 struct sigaction sa; 2131 struct sigaction sa;
1317 sa.sa_handler = sighandler; 2132 sa.sa_handler = ev_sighandler;
1318 sigfillset (&sa.sa_mask); 2133 sigfillset (&sa.sa_mask);
1319 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2134 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1320 sigaction (w->signum, &sa, 0); 2135 sigaction (w->signum, &sa, 0);
2136#endif
1321 } 2137 }
1322} 2138}
1323 2139
1324void 2140void noinline
1325ev_signal_stop (EV_P_ struct ev_signal *w) 2141ev_signal_stop (EV_P_ ev_signal *w)
1326{ 2142{
1327 ev_clear_pending (EV_A_ (W)w); 2143 clear_pending (EV_A_ (W)w);
1328 if (!ev_is_active (w)) 2144 if (expect_false (!ev_is_active (w)))
1329 return; 2145 return;
1330 2146
1331 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2147 wlist_del (&signals [w->signum - 1].head, (WL)w);
1332 ev_stop (EV_A_ (W)w); 2148 ev_stop (EV_A_ (W)w);
1333 2149
1334 if (!signals [w->signum - 1].head) 2150 if (!signals [w->signum - 1].head)
1335 signal (w->signum, SIG_DFL); 2151 signal (w->signum, SIG_DFL);
1336} 2152}
1337 2153
1338void 2154void
1339ev_child_start (EV_P_ struct ev_child *w) 2155ev_child_start (EV_P_ ev_child *w)
1340{ 2156{
1341#if EV_MULTIPLICITY 2157#if EV_MULTIPLICITY
1342 assert (("child watchers are only supported in the default loop", loop == default_loop)); 2158 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1343#endif 2159#endif
1344 if (ev_is_active (w)) 2160 if (expect_false (ev_is_active (w)))
1345 return; 2161 return;
1346 2162
1347 ev_start (EV_A_ (W)w, 1); 2163 ev_start (EV_A_ (W)w, 1);
1348 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2164 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1349} 2165}
1350 2166
1351void 2167void
1352ev_child_stop (EV_P_ struct ev_child *w) 2168ev_child_stop (EV_P_ ev_child *w)
1353{ 2169{
1354 ev_clear_pending (EV_A_ (W)w); 2170 clear_pending (EV_A_ (W)w);
1355 if (ev_is_active (w)) 2171 if (expect_false (!ev_is_active (w)))
1356 return; 2172 return;
1357 2173
1358 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2174 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1359 ev_stop (EV_A_ (W)w); 2175 ev_stop (EV_A_ (W)w);
1360} 2176}
1361 2177
2178#if EV_STAT_ENABLE
2179
2180# ifdef _WIN32
2181# undef lstat
2182# define lstat(a,b) _stati64 (a,b)
2183# endif
2184
2185#define DEF_STAT_INTERVAL 5.0074891
2186#define MIN_STAT_INTERVAL 0.1074891
2187
2188static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2189
2190#if EV_USE_INOTIFY
2191# define EV_INOTIFY_BUFSIZE 8192
2192
2193static void noinline
2194infy_add (EV_P_ ev_stat *w)
2195{
2196 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
2197
2198 if (w->wd < 0)
2199 {
2200 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2201
2202 /* monitor some parent directory for speedup hints */
2203 /* note that exceeding the hardcoded limit is not a correctness issue, */
2204 /* but an efficiency issue only */
2205 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2206 {
2207 char path [4096];
2208 strcpy (path, w->path);
2209
2210 do
2211 {
2212 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2213 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2214
2215 char *pend = strrchr (path, '/');
2216
2217 if (!pend)
2218 break; /* whoops, no '/', complain to your admin */
2219
2220 *pend = 0;
2221 w->wd = inotify_add_watch (fs_fd, path, mask);
2222 }
2223 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2224 }
2225 }
2226 else
2227 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2228
2229 if (w->wd >= 0)
2230 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2231}
2232
2233static void noinline
2234infy_del (EV_P_ ev_stat *w)
2235{
2236 int slot;
2237 int wd = w->wd;
2238
2239 if (wd < 0)
2240 return;
2241
2242 w->wd = -2;
2243 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2244 wlist_del (&fs_hash [slot].head, (WL)w);
2245
2246 /* remove this watcher, if others are watching it, they will rearm */
2247 inotify_rm_watch (fs_fd, wd);
2248}
2249
2250static void noinline
2251infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2252{
2253 if (slot < 0)
2254 /* overflow, need to check for all hahs slots */
2255 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2256 infy_wd (EV_A_ slot, wd, ev);
2257 else
2258 {
2259 WL w_;
2260
2261 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2262 {
2263 ev_stat *w = (ev_stat *)w_;
2264 w_ = w_->next; /* lets us remove this watcher and all before it */
2265
2266 if (w->wd == wd || wd == -1)
2267 {
2268 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2269 {
2270 w->wd = -1;
2271 infy_add (EV_A_ w); /* re-add, no matter what */
2272 }
2273
2274 stat_timer_cb (EV_A_ &w->timer, 0);
2275 }
2276 }
2277 }
2278}
2279
2280static void
2281infy_cb (EV_P_ ev_io *w, int revents)
2282{
2283 char buf [EV_INOTIFY_BUFSIZE];
2284 struct inotify_event *ev = (struct inotify_event *)buf;
2285 int ofs;
2286 int len = read (fs_fd, buf, sizeof (buf));
2287
2288 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2289 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2290}
2291
2292void inline_size
2293infy_init (EV_P)
2294{
2295 if (fs_fd != -2)
2296 return;
2297
2298 fs_fd = inotify_init ();
2299
2300 if (fs_fd >= 0)
2301 {
2302 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2303 ev_set_priority (&fs_w, EV_MAXPRI);
2304 ev_io_start (EV_A_ &fs_w);
2305 }
2306}
2307
2308void inline_size
2309infy_fork (EV_P)
2310{
2311 int slot;
2312
2313 if (fs_fd < 0)
2314 return;
2315
2316 close (fs_fd);
2317 fs_fd = inotify_init ();
2318
2319 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2320 {
2321 WL w_ = fs_hash [slot].head;
2322 fs_hash [slot].head = 0;
2323
2324 while (w_)
2325 {
2326 ev_stat *w = (ev_stat *)w_;
2327 w_ = w_->next; /* lets us add this watcher */
2328
2329 w->wd = -1;
2330
2331 if (fs_fd >= 0)
2332 infy_add (EV_A_ w); /* re-add, no matter what */
2333 else
2334 ev_timer_start (EV_A_ &w->timer);
2335 }
2336
2337 }
2338}
2339
2340#endif
2341
2342void
2343ev_stat_stat (EV_P_ ev_stat *w)
2344{
2345 if (lstat (w->path, &w->attr) < 0)
2346 w->attr.st_nlink = 0;
2347 else if (!w->attr.st_nlink)
2348 w->attr.st_nlink = 1;
2349}
2350
2351static void noinline
2352stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2353{
2354 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2355
2356 /* we copy this here each the time so that */
2357 /* prev has the old value when the callback gets invoked */
2358 w->prev = w->attr;
2359 ev_stat_stat (EV_A_ w);
2360
2361 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2362 if (
2363 w->prev.st_dev != w->attr.st_dev
2364 || w->prev.st_ino != w->attr.st_ino
2365 || w->prev.st_mode != w->attr.st_mode
2366 || w->prev.st_nlink != w->attr.st_nlink
2367 || w->prev.st_uid != w->attr.st_uid
2368 || w->prev.st_gid != w->attr.st_gid
2369 || w->prev.st_rdev != w->attr.st_rdev
2370 || w->prev.st_size != w->attr.st_size
2371 || w->prev.st_atime != w->attr.st_atime
2372 || w->prev.st_mtime != w->attr.st_mtime
2373 || w->prev.st_ctime != w->attr.st_ctime
2374 ) {
2375 #if EV_USE_INOTIFY
2376 infy_del (EV_A_ w);
2377 infy_add (EV_A_ w);
2378 ev_stat_stat (EV_A_ w); /* avoid race... */
2379 #endif
2380
2381 ev_feed_event (EV_A_ w, EV_STAT);
2382 }
2383}
2384
2385void
2386ev_stat_start (EV_P_ ev_stat *w)
2387{
2388 if (expect_false (ev_is_active (w)))
2389 return;
2390
2391 /* since we use memcmp, we need to clear any padding data etc. */
2392 memset (&w->prev, 0, sizeof (ev_statdata));
2393 memset (&w->attr, 0, sizeof (ev_statdata));
2394
2395 ev_stat_stat (EV_A_ w);
2396
2397 if (w->interval < MIN_STAT_INTERVAL)
2398 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2399
2400 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2401 ev_set_priority (&w->timer, ev_priority (w));
2402
2403#if EV_USE_INOTIFY
2404 infy_init (EV_A);
2405
2406 if (fs_fd >= 0)
2407 infy_add (EV_A_ w);
2408 else
2409#endif
2410 ev_timer_start (EV_A_ &w->timer);
2411
2412 ev_start (EV_A_ (W)w, 1);
2413}
2414
2415void
2416ev_stat_stop (EV_P_ ev_stat *w)
2417{
2418 clear_pending (EV_A_ (W)w);
2419 if (expect_false (!ev_is_active (w)))
2420 return;
2421
2422#if EV_USE_INOTIFY
2423 infy_del (EV_A_ w);
2424#endif
2425 ev_timer_stop (EV_A_ &w->timer);
2426
2427 ev_stop (EV_A_ (W)w);
2428}
2429#endif
2430
2431#if EV_IDLE_ENABLE
2432void
2433ev_idle_start (EV_P_ ev_idle *w)
2434{
2435 if (expect_false (ev_is_active (w)))
2436 return;
2437
2438 pri_adjust (EV_A_ (W)w);
2439
2440 {
2441 int active = ++idlecnt [ABSPRI (w)];
2442
2443 ++idleall;
2444 ev_start (EV_A_ (W)w, active);
2445
2446 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2447 idles [ABSPRI (w)][active - 1] = w;
2448 }
2449}
2450
2451void
2452ev_idle_stop (EV_P_ ev_idle *w)
2453{
2454 clear_pending (EV_A_ (W)w);
2455 if (expect_false (!ev_is_active (w)))
2456 return;
2457
2458 {
2459 int active = ev_active (w);
2460
2461 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2462 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2463
2464 ev_stop (EV_A_ (W)w);
2465 --idleall;
2466 }
2467}
2468#endif
2469
2470void
2471ev_prepare_start (EV_P_ ev_prepare *w)
2472{
2473 if (expect_false (ev_is_active (w)))
2474 return;
2475
2476 ev_start (EV_A_ (W)w, ++preparecnt);
2477 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2478 prepares [preparecnt - 1] = w;
2479}
2480
2481void
2482ev_prepare_stop (EV_P_ ev_prepare *w)
2483{
2484 clear_pending (EV_A_ (W)w);
2485 if (expect_false (!ev_is_active (w)))
2486 return;
2487
2488 {
2489 int active = ev_active (w);
2490
2491 prepares [active - 1] = prepares [--preparecnt];
2492 ev_active (prepares [active - 1]) = active;
2493 }
2494
2495 ev_stop (EV_A_ (W)w);
2496}
2497
2498void
2499ev_check_start (EV_P_ ev_check *w)
2500{
2501 if (expect_false (ev_is_active (w)))
2502 return;
2503
2504 ev_start (EV_A_ (W)w, ++checkcnt);
2505 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2506 checks [checkcnt - 1] = w;
2507}
2508
2509void
2510ev_check_stop (EV_P_ ev_check *w)
2511{
2512 clear_pending (EV_A_ (W)w);
2513 if (expect_false (!ev_is_active (w)))
2514 return;
2515
2516 {
2517 int active = ev_active (w);
2518
2519 checks [active - 1] = checks [--checkcnt];
2520 ev_active (checks [active - 1]) = active;
2521 }
2522
2523 ev_stop (EV_A_ (W)w);
2524}
2525
2526#if EV_EMBED_ENABLE
2527void noinline
2528ev_embed_sweep (EV_P_ ev_embed *w)
2529{
2530 ev_loop (w->other, EVLOOP_NONBLOCK);
2531}
2532
2533static void
2534embed_io_cb (EV_P_ ev_io *io, int revents)
2535{
2536 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2537
2538 if (ev_cb (w))
2539 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2540 else
2541 ev_loop (w->other, EVLOOP_NONBLOCK);
2542}
2543
2544static void
2545embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2546{
2547 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2548
2549 {
2550 struct ev_loop *loop = w->other;
2551
2552 while (fdchangecnt)
2553 {
2554 fd_reify (EV_A);
2555 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2556 }
2557 }
2558}
2559
2560#if 0
2561static void
2562embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2563{
2564 ev_idle_stop (EV_A_ idle);
2565}
2566#endif
2567
2568void
2569ev_embed_start (EV_P_ ev_embed *w)
2570{
2571 if (expect_false (ev_is_active (w)))
2572 return;
2573
2574 {
2575 struct ev_loop *loop = w->other;
2576 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2577 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2578 }
2579
2580 ev_set_priority (&w->io, ev_priority (w));
2581 ev_io_start (EV_A_ &w->io);
2582
2583 ev_prepare_init (&w->prepare, embed_prepare_cb);
2584 ev_set_priority (&w->prepare, EV_MINPRI);
2585 ev_prepare_start (EV_A_ &w->prepare);
2586
2587 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2588
2589 ev_start (EV_A_ (W)w, 1);
2590}
2591
2592void
2593ev_embed_stop (EV_P_ ev_embed *w)
2594{
2595 clear_pending (EV_A_ (W)w);
2596 if (expect_false (!ev_is_active (w)))
2597 return;
2598
2599 ev_io_stop (EV_A_ &w->io);
2600 ev_prepare_stop (EV_A_ &w->prepare);
2601
2602 ev_stop (EV_A_ (W)w);
2603}
2604#endif
2605
2606#if EV_FORK_ENABLE
2607void
2608ev_fork_start (EV_P_ ev_fork *w)
2609{
2610 if (expect_false (ev_is_active (w)))
2611 return;
2612
2613 ev_start (EV_A_ (W)w, ++forkcnt);
2614 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2615 forks [forkcnt - 1] = w;
2616}
2617
2618void
2619ev_fork_stop (EV_P_ ev_fork *w)
2620{
2621 clear_pending (EV_A_ (W)w);
2622 if (expect_false (!ev_is_active (w)))
2623 return;
2624
2625 {
2626 int active = ev_active (w);
2627
2628 forks [active - 1] = forks [--forkcnt];
2629 ev_active (forks [active - 1]) = active;
2630 }
2631
2632 ev_stop (EV_A_ (W)w);
2633}
2634#endif
2635
2636#if EV_ASYNC_ENABLE
2637void
2638ev_async_start (EV_P_ ev_async *w)
2639{
2640 if (expect_false (ev_is_active (w)))
2641 return;
2642
2643 evpipe_init (EV_A);
2644
2645 ev_start (EV_A_ (W)w, ++asynccnt);
2646 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2647 asyncs [asynccnt - 1] = w;
2648}
2649
2650void
2651ev_async_stop (EV_P_ ev_async *w)
2652{
2653 clear_pending (EV_A_ (W)w);
2654 if (expect_false (!ev_is_active (w)))
2655 return;
2656
2657 {
2658 int active = ev_active (w);
2659
2660 asyncs [active - 1] = asyncs [--asynccnt];
2661 ev_active (asyncs [active - 1]) = active;
2662 }
2663
2664 ev_stop (EV_A_ (W)w);
2665}
2666
2667void
2668ev_async_send (EV_P_ ev_async *w)
2669{
2670 w->sent = 1;
2671 evpipe_write (EV_A_ &gotasync);
2672}
2673#endif
2674
1362/*****************************************************************************/ 2675/*****************************************************************************/
1363 2676
1364struct ev_once 2677struct ev_once
1365{ 2678{
1366 struct ev_io io; 2679 ev_io io;
1367 struct ev_timer to; 2680 ev_timer to;
1368 void (*cb)(int revents, void *arg); 2681 void (*cb)(int revents, void *arg);
1369 void *arg; 2682 void *arg;
1370}; 2683};
1371 2684
1372static void 2685static void
… …
1375 void (*cb)(int revents, void *arg) = once->cb; 2688 void (*cb)(int revents, void *arg) = once->cb;
1376 void *arg = once->arg; 2689 void *arg = once->arg;
1377 2690
1378 ev_io_stop (EV_A_ &once->io); 2691 ev_io_stop (EV_A_ &once->io);
1379 ev_timer_stop (EV_A_ &once->to); 2692 ev_timer_stop (EV_A_ &once->to);
1380 free (once); 2693 ev_free (once);
1381 2694
1382 cb (revents, arg); 2695 cb (revents, arg);
1383} 2696}
1384 2697
1385static void 2698static void
1386once_cb_io (EV_P_ struct ev_io *w, int revents) 2699once_cb_io (EV_P_ ev_io *w, int revents)
1387{ 2700{
1388 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 2701 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1389} 2702}
1390 2703
1391static void 2704static void
1392once_cb_to (EV_P_ struct ev_timer *w, int revents) 2705once_cb_to (EV_P_ ev_timer *w, int revents)
1393{ 2706{
1394 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 2707 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1395} 2708}
1396 2709
1397void 2710void
1398ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 2711ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1399{ 2712{
1400 struct ev_once *once = malloc (sizeof (struct ev_once)); 2713 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1401 2714
1402 if (!once) 2715 if (expect_false (!once))
2716 {
1403 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 2717 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1404 else 2718 return;
1405 { 2719 }
2720
1406 once->cb = cb; 2721 once->cb = cb;
1407 once->arg = arg; 2722 once->arg = arg;
1408 2723
1409 ev_watcher_init (&once->io, once_cb_io); 2724 ev_init (&once->io, once_cb_io);
1410 if (fd >= 0) 2725 if (fd >= 0)
1411 { 2726 {
1412 ev_io_set (&once->io, fd, events); 2727 ev_io_set (&once->io, fd, events);
1413 ev_io_start (EV_A_ &once->io); 2728 ev_io_start (EV_A_ &once->io);
1414 } 2729 }
1415 2730
1416 ev_watcher_init (&once->to, once_cb_to); 2731 ev_init (&once->to, once_cb_to);
1417 if (timeout >= 0.) 2732 if (timeout >= 0.)
1418 { 2733 {
1419 ev_timer_set (&once->to, timeout, 0.); 2734 ev_timer_set (&once->to, timeout, 0.);
1420 ev_timer_start (EV_A_ &once->to); 2735 ev_timer_start (EV_A_ &once->to);
1421 }
1422 } 2736 }
1423} 2737}
1424 2738
2739#if EV_MULTIPLICITY
2740 #include "ev_wrap.h"
2741#endif
2742
2743#ifdef __cplusplus
2744}
2745#endif
2746

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