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Comparing libev/ev.c (file contents):
Revision 1.139 by root, Sun Nov 25 09:24:37 2007 UTC vs.
Revision 1.241 by root, Fri May 9 13:57:00 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 */
31 39
32#ifdef __cplusplus 40#ifdef __cplusplus
33extern "C" { 41extern "C" {
34#endif 42#endif
35 43
44/* this big block deduces configuration from config.h */
36#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
37# ifdef EV_CONFIG_H 46# ifdef EV_CONFIG_H
38# include EV_CONFIG_H 47# include EV_CONFIG_H
39# else 48# else
40# include "config.h" 49# include "config.h"
… …
51# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
52# define EV_USE_MONOTONIC 0 61# define EV_USE_MONOTONIC 0
53# endif 62# endif
54# ifndef EV_USE_REALTIME 63# ifndef EV_USE_REALTIME
55# define EV_USE_REALTIME 0 64# define EV_USE_REALTIME 0
65# endif
66# endif
67
68# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
70# define EV_USE_NANOSLEEP 1
71# else
72# define EV_USE_NANOSLEEP 0
56# endif 73# endif
57# endif 74# endif
58 75
59# ifndef EV_USE_SELECT 76# ifndef EV_USE_SELECT
60# if HAVE_SELECT && HAVE_SYS_SELECT_H 77# if HAVE_SELECT && HAVE_SYS_SELECT_H
… …
94# else 111# else
95# define EV_USE_PORT 0 112# define EV_USE_PORT 0
96# endif 113# endif
97# endif 114# endif
98 115
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
99#endif 132#endif
100 133
101#include <math.h> 134#include <math.h>
102#include <stdlib.h> 135#include <stdlib.h>
103#include <fcntl.h> 136#include <fcntl.h>
… …
110#include <sys/types.h> 143#include <sys/types.h>
111#include <time.h> 144#include <time.h>
112 145
113#include <signal.h> 146#include <signal.h>
114 147
148#ifdef EV_H
149# include EV_H
150#else
151# include "ev.h"
152#endif
153
115#ifndef _WIN32 154#ifndef _WIN32
116# include <unistd.h>
117# include <sys/time.h> 155# include <sys/time.h>
118# include <sys/wait.h> 156# include <sys/wait.h>
157# include <unistd.h>
119#else 158#else
120# define WIN32_LEAN_AND_MEAN 159# define WIN32_LEAN_AND_MEAN
121# include <windows.h> 160# include <windows.h>
122# ifndef EV_SELECT_IS_WINSOCKET 161# ifndef EV_SELECT_IS_WINSOCKET
123# define EV_SELECT_IS_WINSOCKET 1 162# define EV_SELECT_IS_WINSOCKET 1
124# endif 163# endif
125#endif 164#endif
126 165
127/**/ 166/* this block tries to deduce configuration from header-defined symbols and defaults */
128 167
129#ifndef EV_USE_MONOTONIC 168#ifndef EV_USE_MONOTONIC
130# define EV_USE_MONOTONIC 0 169# define EV_USE_MONOTONIC 0
131#endif 170#endif
132 171
133#ifndef EV_USE_REALTIME 172#ifndef EV_USE_REALTIME
134# define EV_USE_REALTIME 0 173# define EV_USE_REALTIME 0
174#endif
175
176#ifndef EV_USE_NANOSLEEP
177# define EV_USE_NANOSLEEP 0
135#endif 178#endif
136 179
137#ifndef EV_USE_SELECT 180#ifndef EV_USE_SELECT
138# define EV_USE_SELECT 1 181# define EV_USE_SELECT 1
139#endif 182#endif
… …
145# define EV_USE_POLL 1 188# define EV_USE_POLL 1
146# endif 189# endif
147#endif 190#endif
148 191
149#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
150# define EV_USE_EPOLL 0 196# define EV_USE_EPOLL 0
197# endif
151#endif 198#endif
152 199
153#ifndef EV_USE_KQUEUE 200#ifndef EV_USE_KQUEUE
154# define EV_USE_KQUEUE 0 201# define EV_USE_KQUEUE 0
155#endif 202#endif
156 203
157#ifndef EV_USE_PORT 204#ifndef EV_USE_PORT
158# define EV_USE_PORT 0 205# define EV_USE_PORT 0
159#endif 206#endif
160 207
161/**/ 208#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1
211# else
212# define EV_USE_INOTIFY 0
213# endif
214#endif
215
216#ifndef EV_PID_HASHSIZE
217# if EV_MINIMAL
218# define EV_PID_HASHSIZE 1
219# else
220# define EV_PID_HASHSIZE 16
221# endif
222#endif
223
224#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL
226# define EV_INOTIFY_HASHSIZE 1
227# else
228# define EV_INOTIFY_HASHSIZE 16
229# endif
230#endif
231
232#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1
235# else
236# define EV_USE_EVENTFD 0
237# endif
238#endif
239
240/* this block fixes any misconfiguration where we know we run into trouble otherwise */
162 241
163#ifndef CLOCK_MONOTONIC 242#ifndef CLOCK_MONOTONIC
164# undef EV_USE_MONOTONIC 243# undef EV_USE_MONOTONIC
165# define EV_USE_MONOTONIC 0 244# define EV_USE_MONOTONIC 0
166#endif 245#endif
… …
168#ifndef CLOCK_REALTIME 247#ifndef CLOCK_REALTIME
169# undef EV_USE_REALTIME 248# undef EV_USE_REALTIME
170# define EV_USE_REALTIME 0 249# define EV_USE_REALTIME 0
171#endif 250#endif
172 251
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
173#if EV_SELECT_IS_WINSOCKET 267#if EV_SELECT_IS_WINSOCKET
174# include <winsock.h> 268# include <winsock.h>
175#endif 269#endif
176 270
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
177/**/ 283/**/
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 */
178 294
179#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) */
180#define MAX_BLOCKTIME 59.743 /* 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) */
181#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
182/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* 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 */
183 298
184#ifdef EV_H
185# include EV_H
186#else
187# include "ev.h"
188#endif
189
190#if __GNUC__ >= 3 299#if __GNUC__ >= 4
191# define expect(expr,value) __builtin_expect ((expr),(value)) 300# define expect(expr,value) __builtin_expect ((expr),(value))
192# define inline static inline 301# define noinline __attribute__ ((noinline))
193#else 302#else
194# define expect(expr,value) (expr) 303# define expect(expr,value) (expr)
195# define inline static 304# define noinline
305# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
306# define inline
307# endif
196#endif 308#endif
197 309
198#define expect_false(expr) expect ((expr) != 0, 0) 310#define expect_false(expr) expect ((expr) != 0, 0)
199#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
200 319
201#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 320#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
202#define ABSPRI(w) ((w)->priority - EV_MINPRI) 321#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
203 322
204#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ 323#define EMPTY /* required for microsofts broken pseudo-c compiler */
205#define EMPTY2(a,b) /* used to suppress some warnings */ 324#define EMPTY2(a,b) /* used to suppress some warnings */
206 325
207typedef ev_watcher *W; 326typedef ev_watcher *W;
208typedef ev_watcher_list *WL; 327typedef ev_watcher_list *WL;
209typedef ev_watcher_time *WT; 328typedef ev_watcher_time *WT;
210 329
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 */
211static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 336static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
337#endif
212 338
213#ifdef _WIN32 339#ifdef _WIN32
214# include "ev_win32.c" 340# include "ev_win32.c"
215#endif 341#endif
216 342
217/*****************************************************************************/ 343/*****************************************************************************/
218 344
219static void (*syserr_cb)(const char *msg); 345static void (*syserr_cb)(const char *msg);
220 346
347void
221void ev_set_syserr_cb (void (*cb)(const char *msg)) 348ev_set_syserr_cb (void (*cb)(const char *msg))
222{ 349{
223 syserr_cb = cb; 350 syserr_cb = cb;
224} 351}
225 352
226static void 353static void noinline
227syserr (const char *msg) 354syserr (const char *msg)
228{ 355{
229 if (!msg) 356 if (!msg)
230 msg = "(libev) system error"; 357 msg = "(libev) system error";
231 358
… …
236 perror (msg); 363 perror (msg);
237 abort (); 364 abort ();
238 } 365 }
239} 366}
240 367
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
241static void *(*alloc)(void *ptr, long size); 383static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
242 384
385void
243void ev_set_allocator (void *(*cb)(void *ptr, long size)) 386ev_set_allocator (void *(*cb)(void *ptr, long size))
244{ 387{
245 alloc = cb; 388 alloc = cb;
246} 389}
247 390
248static void * 391inline_speed void *
249ev_realloc (void *ptr, long size) 392ev_realloc (void *ptr, long size)
250{ 393{
251 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 394 ptr = alloc (ptr, size);
252 395
253 if (!ptr && size) 396 if (!ptr && size)
254 { 397 {
255 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 398 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
256 abort (); 399 abort ();
… …
277typedef struct 420typedef struct
278{ 421{
279 W w; 422 W w;
280 int events; 423 int events;
281} ANPENDING; 424} ANPENDING;
425
426#if EV_USE_INOTIFY
427/* hash table entry per inotify-id */
428typedef struct
429{
430 WL head;
431} ANFS;
432#endif
433
434/* Heap Entry */
435#if EV_HEAP_CACHE_AT
436 typedef struct {
437 WT w;
438 ev_tstamp at;
439 } ANHE;
440
441 #define ANHE_w(he) (he) /* access watcher, read-write */
442 #define ANHE_at(he) (he)->at /* acces cahced at, read-only */
443 #define ANHE_at_set(he) (he)->at = (he)->w->at /* update at from watcher */
444#else
445 typedef WT ANHE;
446
447 #define ANHE_w(he) (he)
448 #define ANHE_at(he) (he)->at
449 #define ANHE_at_set(he)
450#endif
282 451
283#if EV_MULTIPLICITY 452#if EV_MULTIPLICITY
284 453
285 struct ev_loop 454 struct ev_loop
286 { 455 {
… …
320 gettimeofday (&tv, 0); 489 gettimeofday (&tv, 0);
321 return tv.tv_sec + tv.tv_usec * 1e-6; 490 return tv.tv_sec + tv.tv_usec * 1e-6;
322#endif 491#endif
323} 492}
324 493
325inline ev_tstamp 494ev_tstamp inline_size
326get_clock (void) 495get_clock (void)
327{ 496{
328#if EV_USE_MONOTONIC 497#if EV_USE_MONOTONIC
329 if (expect_true (have_monotonic)) 498 if (expect_true (have_monotonic))
330 { 499 {
… …
343{ 512{
344 return ev_rt_now; 513 return ev_rt_now;
345} 514}
346#endif 515#endif
347 516
348#define array_roundsize(type,n) (((n) | 4) & ~3) 517void
518ev_sleep (ev_tstamp delay)
519{
520 if (delay > 0.)
521 {
522#if EV_USE_NANOSLEEP
523 struct timespec ts;
524
525 ts.tv_sec = (time_t)delay;
526 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
527
528 nanosleep (&ts, 0);
529#elif defined(_WIN32)
530 Sleep ((unsigned long)(delay * 1e3));
531#else
532 struct timeval tv;
533
534 tv.tv_sec = (time_t)delay;
535 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
536
537 select (0, 0, 0, 0, &tv);
538#endif
539 }
540}
541
542/*****************************************************************************/
543
544#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
545
546int inline_size
547array_nextsize (int elem, int cur, int cnt)
548{
549 int ncur = cur + 1;
550
551 do
552 ncur <<= 1;
553 while (cnt > ncur);
554
555 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
556 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
557 {
558 ncur *= elem;
559 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
560 ncur = ncur - sizeof (void *) * 4;
561 ncur /= elem;
562 }
563
564 return ncur;
565}
566
567static noinline void *
568array_realloc (int elem, void *base, int *cur, int cnt)
569{
570 *cur = array_nextsize (elem, *cur, cnt);
571 return ev_realloc (base, elem * *cur);
572}
349 573
350#define array_needsize(type,base,cur,cnt,init) \ 574#define array_needsize(type,base,cur,cnt,init) \
351 if (expect_false ((cnt) > cur)) \ 575 if (expect_false ((cnt) > (cur))) \
352 { \ 576 { \
353 int newcnt = cur; \ 577 int ocur_ = (cur); \
354 do \ 578 (base) = (type *)array_realloc \
355 { \ 579 (sizeof (type), (base), &(cur), (cnt)); \
356 newcnt = array_roundsize (type, newcnt << 1); \ 580 init ((base) + (ocur_), (cur) - ocur_); \
357 } \
358 while ((cnt) > newcnt); \
359 \
360 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
361 init (base + cur, newcnt - cur); \
362 cur = newcnt; \
363 } 581 }
364 582
583#if 0
365#define array_slim(type,stem) \ 584#define array_slim(type,stem) \
366 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 585 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
367 { \ 586 { \
368 stem ## max = array_roundsize (stem ## cnt >> 1); \ 587 stem ## max = array_roundsize (stem ## cnt >> 1); \
369 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 588 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
370 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 589 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
371 } 590 }
591#endif
372 592
373#define array_free(stem, idx) \ 593#define array_free(stem, idx) \
374 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 594 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
375 595
376/*****************************************************************************/ 596/*****************************************************************************/
377 597
378static void 598void noinline
599ev_feed_event (EV_P_ void *w, int revents)
600{
601 W w_ = (W)w;
602 int pri = ABSPRI (w_);
603
604 if (expect_false (w_->pending))
605 pendings [pri][w_->pending - 1].events |= revents;
606 else
607 {
608 w_->pending = ++pendingcnt [pri];
609 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
610 pendings [pri][w_->pending - 1].w = w_;
611 pendings [pri][w_->pending - 1].events = revents;
612 }
613}
614
615void inline_speed
616queue_events (EV_P_ W *events, int eventcnt, int type)
617{
618 int i;
619
620 for (i = 0; i < eventcnt; ++i)
621 ev_feed_event (EV_A_ events [i], type);
622}
623
624/*****************************************************************************/
625
626void inline_size
379anfds_init (ANFD *base, int count) 627anfds_init (ANFD *base, int count)
380{ 628{
381 while (count--) 629 while (count--)
382 { 630 {
383 base->head = 0; 631 base->head = 0;
… …
386 634
387 ++base; 635 ++base;
388 } 636 }
389} 637}
390 638
391void 639void inline_speed
392ev_feed_event (EV_P_ void *w, int revents)
393{
394 W w_ = (W)w;
395
396 if (expect_false (w_->pending))
397 {
398 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
399 return;
400 }
401
402 w_->pending = ++pendingcnt [ABSPRI (w_)];
403 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
404 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
405 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
406}
407
408static void
409queue_events (EV_P_ W *events, int eventcnt, int type)
410{
411 int i;
412
413 for (i = 0; i < eventcnt; ++i)
414 ev_feed_event (EV_A_ events [i], type);
415}
416
417inline void
418fd_event (EV_P_ int fd, int revents) 640fd_event (EV_P_ int fd, int revents)
419{ 641{
420 ANFD *anfd = anfds + fd; 642 ANFD *anfd = anfds + fd;
421 ev_io *w; 643 ev_io *w;
422 644
… …
430} 652}
431 653
432void 654void
433ev_feed_fd_event (EV_P_ int fd, int revents) 655ev_feed_fd_event (EV_P_ int fd, int revents)
434{ 656{
657 if (fd >= 0 && fd < anfdmax)
435 fd_event (EV_A_ fd, revents); 658 fd_event (EV_A_ fd, revents);
436} 659}
437 660
438/*****************************************************************************/ 661void inline_size
439
440inline void
441fd_reify (EV_P) 662fd_reify (EV_P)
442{ 663{
443 int i; 664 int i;
444 665
445 for (i = 0; i < fdchangecnt; ++i) 666 for (i = 0; i < fdchangecnt; ++i)
446 { 667 {
447 int fd = fdchanges [i]; 668 int fd = fdchanges [i];
448 ANFD *anfd = anfds + fd; 669 ANFD *anfd = anfds + fd;
449 ev_io *w; 670 ev_io *w;
450 671
451 int events = 0; 672 unsigned char events = 0;
452 673
453 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 674 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
454 events |= w->events; 675 events |= (unsigned char)w->events;
455 676
456#if EV_SELECT_IS_WINSOCKET 677#if EV_SELECT_IS_WINSOCKET
457 if (events) 678 if (events)
458 { 679 {
459 unsigned long argp; 680 unsigned long argp;
681 #ifdef EV_FD_TO_WIN32_HANDLE
682 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
683 #else
460 anfd->handle = _get_osfhandle (fd); 684 anfd->handle = _get_osfhandle (fd);
685 #endif
461 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 686 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
462 } 687 }
463#endif 688#endif
464 689
690 {
691 unsigned char o_events = anfd->events;
692 unsigned char o_reify = anfd->reify;
693
465 anfd->reify = 0; 694 anfd->reify = 0;
466
467 backend_modify (EV_A_ fd, anfd->events, events);
468 anfd->events = events; 695 anfd->events = events;
696
697 if (o_events != events || o_reify & EV_IOFDSET)
698 backend_modify (EV_A_ fd, o_events, events);
699 }
469 } 700 }
470 701
471 fdchangecnt = 0; 702 fdchangecnt = 0;
472} 703}
473 704
474static void 705void inline_size
475fd_change (EV_P_ int fd) 706fd_change (EV_P_ int fd, int flags)
476{ 707{
477 if (expect_false (anfds [fd].reify)) 708 unsigned char reify = anfds [fd].reify;
478 return;
479
480 anfds [fd].reify = 1; 709 anfds [fd].reify |= flags;
481 710
711 if (expect_true (!reify))
712 {
482 ++fdchangecnt; 713 ++fdchangecnt;
483 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 714 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
484 fdchanges [fdchangecnt - 1] = fd; 715 fdchanges [fdchangecnt - 1] = fd;
716 }
485} 717}
486 718
487static void 719void inline_speed
488fd_kill (EV_P_ int fd) 720fd_kill (EV_P_ int fd)
489{ 721{
490 ev_io *w; 722 ev_io *w;
491 723
492 while ((w = (ev_io *)anfds [fd].head)) 724 while ((w = (ev_io *)anfds [fd].head))
… …
494 ev_io_stop (EV_A_ w); 726 ev_io_stop (EV_A_ w);
495 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 727 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
496 } 728 }
497} 729}
498 730
499inline int 731int inline_size
500fd_valid (int fd) 732fd_valid (int fd)
501{ 733{
502#ifdef _WIN32 734#ifdef _WIN32
503 return _get_osfhandle (fd) != -1; 735 return _get_osfhandle (fd) != -1;
504#else 736#else
505 return fcntl (fd, F_GETFD) != -1; 737 return fcntl (fd, F_GETFD) != -1;
506#endif 738#endif
507} 739}
508 740
509/* called on EBADF to verify fds */ 741/* called on EBADF to verify fds */
510static void 742static void noinline
511fd_ebadf (EV_P) 743fd_ebadf (EV_P)
512{ 744{
513 int fd; 745 int fd;
514 746
515 for (fd = 0; fd < anfdmax; ++fd) 747 for (fd = 0; fd < anfdmax; ++fd)
… …
517 if (!fd_valid (fd) == -1 && errno == EBADF) 749 if (!fd_valid (fd) == -1 && errno == EBADF)
518 fd_kill (EV_A_ fd); 750 fd_kill (EV_A_ fd);
519} 751}
520 752
521/* called on ENOMEM in select/poll to kill some fds and retry */ 753/* called on ENOMEM in select/poll to kill some fds and retry */
522static void 754static void noinline
523fd_enomem (EV_P) 755fd_enomem (EV_P)
524{ 756{
525 int fd; 757 int fd;
526 758
527 for (fd = anfdmax; fd--; ) 759 for (fd = anfdmax; fd--; )
… …
531 return; 763 return;
532 } 764 }
533} 765}
534 766
535/* usually called after fork if backend needs to re-arm all fds from scratch */ 767/* usually called after fork if backend needs to re-arm all fds from scratch */
536static void 768static void noinline
537fd_rearm_all (EV_P) 769fd_rearm_all (EV_P)
538{ 770{
539 int fd; 771 int fd;
540 772
541 /* this should be highly optimised to not do anything but set a flag */
542 for (fd = 0; fd < anfdmax; ++fd) 773 for (fd = 0; fd < anfdmax; ++fd)
543 if (anfds [fd].events) 774 if (anfds [fd].events)
544 { 775 {
545 anfds [fd].events = 0; 776 anfds [fd].events = 0;
546 fd_change (EV_A_ fd); 777 fd_change (EV_A_ fd, EV_IOFDSET | 1);
547 } 778 }
548} 779}
549 780
550/*****************************************************************************/ 781/*****************************************************************************/
551 782
552static void 783/*
784 * the heap functions want a real array index. array index 0 uis guaranteed to not
785 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
786 * the branching factor of the d-tree.
787 */
788
789/*
790 * at the moment we allow libev the luxury of two heaps,
791 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
792 * which is more cache-efficient.
793 * the difference is about 5% with 50000+ watchers.
794 */
795#define EV_USE_4HEAP !EV_MINIMAL
796#if EV_USE_4HEAP
797
798#define DHEAP 4
799#define HEAP0 (DHEAP - 1) /* index of first element in heap */
800
801/* towards the root */
802void inline_speed
553upheap (WT *heap, int k) 803upheap (ANHE *heap, int k)
554{ 804{
555 WT w = heap [k]; 805 ANHE he = heap [k];
556 806
557 while (k && heap [k >> 1]->at > w->at) 807 for (;;)
558 { 808 {
809 int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
810
811 if (p == k || ANHE_at (heap [p]) <= ANHE_at (he))
812 break;
813
559 heap [k] = heap [k >> 1]; 814 heap [k] = heap [p];
560 ((W)heap [k])->active = k + 1; 815 ev_active (ANHE_w (heap [k])) = k;
561 k >>= 1; 816 k = p;
817 }
818
819 ev_active (ANHE_w (he)) = k;
820 heap [k] = he;
821}
822
823/* away from the root */
824void inline_speed
825downheap (ANHE *heap, int N, int k)
826{
827 ANHE he = heap [k];
828 ANHE *E = heap + N + HEAP0;
829
830 for (;;)
831 {
832 ev_tstamp minat;
833 ANHE *minpos;
834 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0;
835
836 // find minimum child
837 if (expect_true (pos + DHEAP - 1 < E))
838 {
839 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
840 if (ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
841 if (ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
842 if (ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
843 }
844 else if (pos < E)
845 {
846 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
847 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
848 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
849 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
850 }
851 else
852 break;
853
854 if (ANHE_at (he) <= minat)
855 break;
856
857 ev_active (ANHE_w (*minpos)) = k;
858 heap [k] = *minpos;
859
860 k = minpos - heap;
861 }
862
863 ev_active (ANHE_w (he)) = k;
864 heap [k] = he;
865}
866
867#else // 4HEAP
868
869#define HEAP0 1
870
871/* towards the root */
872void inline_speed
873upheap (ANHE *heap, int k)
874{
875 ANHE he = heap [k];
876
877 for (;;)
878 {
879 int p = k >> 1;
880
881 /* maybe we could use a dummy element at heap [0]? */
882 if (!p || ANHE_at (heap [p]) <= ANHE_at (he))
883 break;
884
885 heap [k] = heap [p];
886 ev_active (ANHE_w (heap [k])) = k;
887 k = p;
562 } 888 }
563 889
564 heap [k] = w; 890 heap [k] = w;
565 ((W)heap [k])->active = k + 1; 891 ev_active (ANHE_w (heap [k])) = k;
566
567} 892}
568 893
569static void 894/* away from the root */
895void inline_speed
570downheap (WT *heap, int N, int k) 896downheap (ANHE *heap, int N, int k)
571{ 897{
572 WT w = heap [k]; 898 ANHE he = heap [k];
573 899
574 while (k < (N >> 1)) 900 for (;;)
575 { 901 {
576 int j = k << 1; 902 int c = k << 1;
577 903
578 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 904 if (c > N)
579 ++j;
580
581 if (w->at <= heap [j]->at)
582 break; 905 break;
583 906
907 c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
908 ? 1 : 0;
909
910 if (w->at <= ANHE_at (heap [c]))
911 break;
912
584 heap [k] = heap [j]; 913 heap [k] = heap [c];
585 ((W)heap [k])->active = k + 1; 914 ev_active (ANHE_w (heap [k])) = k;
915
586 k = j; 916 k = c;
587 } 917 }
588 918
589 heap [k] = w; 919 heap [k] = he;
590 ((W)heap [k])->active = k + 1; 920 ev_active (ANHE_w (he)) = k;
591} 921}
922#endif
592 923
593inline void 924void inline_size
594adjustheap (WT *heap, int N, int k) 925adjustheap (ANHE *heap, int N, int k)
595{ 926{
596 upheap (heap, k); 927 upheap (heap, k);
597 downheap (heap, N, k); 928 downheap (heap, N, k);
598} 929}
599 930
600/*****************************************************************************/ 931/*****************************************************************************/
601 932
602typedef struct 933typedef struct
603{ 934{
604 WL head; 935 WL head;
605 sig_atomic_t volatile gotsig; 936 EV_ATOMIC_T gotsig;
606} ANSIG; 937} ANSIG;
607 938
608static ANSIG *signals; 939static ANSIG *signals;
609static int signalmax; 940static int signalmax;
610 941
611static int sigpipe [2]; 942static EV_ATOMIC_T gotsig;
612static sig_atomic_t volatile gotsig;
613static ev_io sigev;
614 943
615static void 944void inline_size
616signals_init (ANSIG *base, int count) 945signals_init (ANSIG *base, int count)
617{ 946{
618 while (count--) 947 while (count--)
619 { 948 {
620 base->head = 0; 949 base->head = 0;
… …
622 951
623 ++base; 952 ++base;
624 } 953 }
625} 954}
626 955
627static void 956/*****************************************************************************/
628sighandler (int signum)
629{
630#if _WIN32
631 signal (signum, sighandler);
632#endif
633 957
634 signals [signum - 1].gotsig = 1; 958void inline_speed
635
636 if (!gotsig)
637 {
638 int old_errno = errno;
639 gotsig = 1;
640 write (sigpipe [1], &signum, 1);
641 errno = old_errno;
642 }
643}
644
645void
646ev_feed_signal_event (EV_P_ int signum)
647{
648 WL w;
649
650#if EV_MULTIPLICITY
651 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
652#endif
653
654 --signum;
655
656 if (signum < 0 || signum >= signalmax)
657 return;
658
659 signals [signum].gotsig = 0;
660
661 for (w = signals [signum].head; w; w = w->next)
662 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
663}
664
665static void
666sigcb (EV_P_ ev_io *iow, int revents)
667{
668 int signum;
669
670 read (sigpipe [0], &revents, 1);
671 gotsig = 0;
672
673 for (signum = signalmax; signum--; )
674 if (signals [signum].gotsig)
675 ev_feed_signal_event (EV_A_ signum + 1);
676}
677
678static void
679fd_intern (int fd) 959fd_intern (int fd)
680{ 960{
681#ifdef _WIN32 961#ifdef _WIN32
682 int arg = 1; 962 int arg = 1;
683 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 963 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
… …
685 fcntl (fd, F_SETFD, FD_CLOEXEC); 965 fcntl (fd, F_SETFD, FD_CLOEXEC);
686 fcntl (fd, F_SETFL, O_NONBLOCK); 966 fcntl (fd, F_SETFL, O_NONBLOCK);
687#endif 967#endif
688} 968}
689 969
970static void noinline
971evpipe_init (EV_P)
972{
973 if (!ev_is_active (&pipeev))
974 {
975#if EV_USE_EVENTFD
976 if ((evfd = eventfd (0, 0)) >= 0)
977 {
978 evpipe [0] = -1;
979 fd_intern (evfd);
980 ev_io_set (&pipeev, evfd, EV_READ);
981 }
982 else
983#endif
984 {
985 while (pipe (evpipe))
986 syserr ("(libev) error creating signal/async pipe");
987
988 fd_intern (evpipe [0]);
989 fd_intern (evpipe [1]);
990 ev_io_set (&pipeev, evpipe [0], EV_READ);
991 }
992
993 ev_io_start (EV_A_ &pipeev);
994 ev_unref (EV_A); /* watcher should not keep loop alive */
995 }
996}
997
998void inline_size
999evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1000{
1001 if (!*flag)
1002 {
1003 int old_errno = errno; /* save errno because write might clobber it */
1004
1005 *flag = 1;
1006
1007#if EV_USE_EVENTFD
1008 if (evfd >= 0)
1009 {
1010 uint64_t counter = 1;
1011 write (evfd, &counter, sizeof (uint64_t));
1012 }
1013 else
1014#endif
1015 write (evpipe [1], &old_errno, 1);
1016
1017 errno = old_errno;
1018 }
1019}
1020
690static void 1021static void
691siginit (EV_P) 1022pipecb (EV_P_ ev_io *iow, int revents)
692{ 1023{
693 fd_intern (sigpipe [0]); 1024#if EV_USE_EVENTFD
694 fd_intern (sigpipe [1]); 1025 if (evfd >= 0)
1026 {
1027 uint64_t counter;
1028 read (evfd, &counter, sizeof (uint64_t));
1029 }
1030 else
1031#endif
1032 {
1033 char dummy;
1034 read (evpipe [0], &dummy, 1);
1035 }
695 1036
696 ev_io_set (&sigev, sigpipe [0], EV_READ); 1037 if (gotsig && ev_is_default_loop (EV_A))
697 ev_io_start (EV_A_ &sigev); 1038 {
698 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1039 int signum;
1040 gotsig = 0;
1041
1042 for (signum = signalmax; signum--; )
1043 if (signals [signum].gotsig)
1044 ev_feed_signal_event (EV_A_ signum + 1);
1045 }
1046
1047#if EV_ASYNC_ENABLE
1048 if (gotasync)
1049 {
1050 int i;
1051 gotasync = 0;
1052
1053 for (i = asynccnt; i--; )
1054 if (asyncs [i]->sent)
1055 {
1056 asyncs [i]->sent = 0;
1057 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1058 }
1059 }
1060#endif
699} 1061}
700 1062
701/*****************************************************************************/ 1063/*****************************************************************************/
702 1064
1065static void
1066ev_sighandler (int signum)
1067{
1068#if EV_MULTIPLICITY
1069 struct ev_loop *loop = &default_loop_struct;
1070#endif
1071
1072#if _WIN32
1073 signal (signum, ev_sighandler);
1074#endif
1075
1076 signals [signum - 1].gotsig = 1;
1077 evpipe_write (EV_A_ &gotsig);
1078}
1079
1080void noinline
1081ev_feed_signal_event (EV_P_ int signum)
1082{
1083 WL w;
1084
1085#if EV_MULTIPLICITY
1086 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1087#endif
1088
1089 --signum;
1090
1091 if (signum < 0 || signum >= signalmax)
1092 return;
1093
1094 signals [signum].gotsig = 0;
1095
1096 for (w = signals [signum].head; w; w = w->next)
1097 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1098}
1099
1100/*****************************************************************************/
1101
703static ev_child *childs [PID_HASHSIZE]; 1102static WL childs [EV_PID_HASHSIZE];
704 1103
705#ifndef _WIN32 1104#ifndef _WIN32
706 1105
707static ev_signal childev; 1106static ev_signal childev;
1107
1108#ifndef WIFCONTINUED
1109# define WIFCONTINUED(status) 0
1110#endif
1111
1112void inline_speed
1113child_reap (EV_P_ int chain, int pid, int status)
1114{
1115 ev_child *w;
1116 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1117
1118 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1119 {
1120 if ((w->pid == pid || !w->pid)
1121 && (!traced || (w->flags & 1)))
1122 {
1123 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1124 w->rpid = pid;
1125 w->rstatus = status;
1126 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1127 }
1128 }
1129}
708 1130
709#ifndef WCONTINUED 1131#ifndef WCONTINUED
710# define WCONTINUED 0 1132# define WCONTINUED 0
711#endif 1133#endif
712 1134
713static void 1135static void
714child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
715{
716 ev_child *w;
717
718 for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
719 if (w->pid == pid || !w->pid)
720 {
721 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
722 w->rpid = pid;
723 w->rstatus = status;
724 ev_feed_event (EV_A_ (W)w, EV_CHILD);
725 }
726}
727
728static void
729childcb (EV_P_ ev_signal *sw, int revents) 1136childcb (EV_P_ ev_signal *sw, int revents)
730{ 1137{
731 int pid, status; 1138 int pid, status;
732 1139
1140 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
733 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1141 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
734 { 1142 if (!WCONTINUED
1143 || errno != EINVAL
1144 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1145 return;
1146
735 /* make sure we are called again until all childs have been reaped */ 1147 /* make sure we are called again until all children have been reaped */
736 /* we need to do it this way so that the callback gets called before we continue */ 1148 /* we need to do it this way so that the callback gets called before we continue */
737 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1149 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
738 1150
739 child_reap (EV_A_ sw, pid, pid, status); 1151 child_reap (EV_A_ pid, pid, status);
1152 if (EV_PID_HASHSIZE > 1)
740 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1153 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
741 }
742} 1154}
743 1155
744#endif 1156#endif
745 1157
746/*****************************************************************************/ 1158/*****************************************************************************/
… …
772{ 1184{
773 return EV_VERSION_MINOR; 1185 return EV_VERSION_MINOR;
774} 1186}
775 1187
776/* return true if we are running with elevated privileges and should ignore env variables */ 1188/* return true if we are running with elevated privileges and should ignore env variables */
777static int 1189int inline_size
778enable_secure (void) 1190enable_secure (void)
779{ 1191{
780#ifdef _WIN32 1192#ifdef _WIN32
781 return 0; 1193 return 0;
782#else 1194#else
… …
818} 1230}
819 1231
820unsigned int 1232unsigned int
821ev_embeddable_backends (void) 1233ev_embeddable_backends (void)
822{ 1234{
823 return EVBACKEND_EPOLL 1235 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
824 | EVBACKEND_KQUEUE 1236
825 | EVBACKEND_PORT; 1237 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1238 /* please fix it and tell me how to detect the fix */
1239 flags &= ~EVBACKEND_EPOLL;
1240
1241 return flags;
826} 1242}
827 1243
828unsigned int 1244unsigned int
829ev_backend (EV_P) 1245ev_backend (EV_P)
830{ 1246{
831 return backend; 1247 return backend;
832} 1248}
833 1249
834static void 1250unsigned int
1251ev_loop_count (EV_P)
1252{
1253 return loop_count;
1254}
1255
1256void
1257ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1258{
1259 io_blocktime = interval;
1260}
1261
1262void
1263ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1264{
1265 timeout_blocktime = interval;
1266}
1267
1268static void noinline
835loop_init (EV_P_ unsigned int flags) 1269loop_init (EV_P_ unsigned int flags)
836{ 1270{
837 if (!backend) 1271 if (!backend)
838 { 1272 {
839#if EV_USE_MONOTONIC 1273#if EV_USE_MONOTONIC
… …
842 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1276 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
843 have_monotonic = 1; 1277 have_monotonic = 1;
844 } 1278 }
845#endif 1279#endif
846 1280
847 ev_rt_now = ev_time (); 1281 ev_rt_now = ev_time ();
848 mn_now = get_clock (); 1282 mn_now = get_clock ();
849 now_floor = mn_now; 1283 now_floor = mn_now;
850 rtmn_diff = ev_rt_now - mn_now; 1284 rtmn_diff = ev_rt_now - mn_now;
1285
1286 io_blocktime = 0.;
1287 timeout_blocktime = 0.;
1288 backend = 0;
1289 backend_fd = -1;
1290 gotasync = 0;
1291#if EV_USE_INOTIFY
1292 fs_fd = -2;
1293#endif
1294
1295 /* pid check not overridable via env */
1296#ifndef _WIN32
1297 if (flags & EVFLAG_FORKCHECK)
1298 curpid = getpid ();
1299#endif
851 1300
852 if (!(flags & EVFLAG_NOENV) 1301 if (!(flags & EVFLAG_NOENV)
853 && !enable_secure () 1302 && !enable_secure ()
854 && getenv ("LIBEV_FLAGS")) 1303 && getenv ("LIBEV_FLAGS"))
855 flags = atoi (getenv ("LIBEV_FLAGS")); 1304 flags = atoi (getenv ("LIBEV_FLAGS"));
856 1305
857 if (!(flags & 0x0000ffffUL)) 1306 if (!(flags & 0x0000ffffU))
858 flags |= ev_recommended_backends (); 1307 flags |= ev_recommended_backends ();
859 1308
860 backend = 0;
861#if EV_USE_PORT 1309#if EV_USE_PORT
862 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1310 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
863#endif 1311#endif
864#if EV_USE_KQUEUE 1312#if EV_USE_KQUEUE
865 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1313 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
872#endif 1320#endif
873#if EV_USE_SELECT 1321#if EV_USE_SELECT
874 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1322 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
875#endif 1323#endif
876 1324
877 ev_init (&sigev, sigcb); 1325 ev_init (&pipeev, pipecb);
878 ev_set_priority (&sigev, EV_MAXPRI); 1326 ev_set_priority (&pipeev, EV_MAXPRI);
879 } 1327 }
880} 1328}
881 1329
882static void 1330static void noinline
883loop_destroy (EV_P) 1331loop_destroy (EV_P)
884{ 1332{
885 int i; 1333 int i;
1334
1335 if (ev_is_active (&pipeev))
1336 {
1337 ev_ref (EV_A); /* signal watcher */
1338 ev_io_stop (EV_A_ &pipeev);
1339
1340#if EV_USE_EVENTFD
1341 if (evfd >= 0)
1342 close (evfd);
1343#endif
1344
1345 if (evpipe [0] >= 0)
1346 {
1347 close (evpipe [0]);
1348 close (evpipe [1]);
1349 }
1350 }
1351
1352#if EV_USE_INOTIFY
1353 if (fs_fd >= 0)
1354 close (fs_fd);
1355#endif
1356
1357 if (backend_fd >= 0)
1358 close (backend_fd);
886 1359
887#if EV_USE_PORT 1360#if EV_USE_PORT
888 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1361 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
889#endif 1362#endif
890#if EV_USE_KQUEUE 1363#if EV_USE_KQUEUE
… …
899#if EV_USE_SELECT 1372#if EV_USE_SELECT
900 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 1373 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
901#endif 1374#endif
902 1375
903 for (i = NUMPRI; i--; ) 1376 for (i = NUMPRI; i--; )
1377 {
904 array_free (pending, [i]); 1378 array_free (pending, [i]);
1379#if EV_IDLE_ENABLE
1380 array_free (idle, [i]);
1381#endif
1382 }
1383
1384 ev_free (anfds); anfdmax = 0;
905 1385
906 /* have to use the microsoft-never-gets-it-right macro */ 1386 /* have to use the microsoft-never-gets-it-right macro */
907 array_free (fdchange, EMPTY0); 1387 array_free (fdchange, EMPTY);
908 array_free (timer, EMPTY0); 1388 array_free (timer, EMPTY);
909#if EV_PERIODICS 1389#if EV_PERIODIC_ENABLE
910 array_free (periodic, EMPTY0); 1390 array_free (periodic, EMPTY);
911#endif 1391#endif
1392#if EV_FORK_ENABLE
912 array_free (idle, EMPTY0); 1393 array_free (fork, EMPTY);
1394#endif
913 array_free (prepare, EMPTY0); 1395 array_free (prepare, EMPTY);
914 array_free (check, EMPTY0); 1396 array_free (check, EMPTY);
1397#if EV_ASYNC_ENABLE
1398 array_free (async, EMPTY);
1399#endif
915 1400
916 backend = 0; 1401 backend = 0;
917} 1402}
918 1403
919static void 1404#if EV_USE_INOTIFY
1405void inline_size infy_fork (EV_P);
1406#endif
1407
1408void inline_size
920loop_fork (EV_P) 1409loop_fork (EV_P)
921{ 1410{
922#if EV_USE_PORT 1411#if EV_USE_PORT
923 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 1412 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
924#endif 1413#endif
… …
926 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 1415 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
927#endif 1416#endif
928#if EV_USE_EPOLL 1417#if EV_USE_EPOLL
929 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 1418 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
930#endif 1419#endif
1420#if EV_USE_INOTIFY
1421 infy_fork (EV_A);
1422#endif
931 1423
932 if (ev_is_active (&sigev)) 1424 if (ev_is_active (&pipeev))
933 { 1425 {
934 /* default loop */ 1426 /* this "locks" the handlers against writing to the pipe */
1427 /* while we modify the fd vars */
1428 gotsig = 1;
1429#if EV_ASYNC_ENABLE
1430 gotasync = 1;
1431#endif
935 1432
936 ev_ref (EV_A); 1433 ev_ref (EV_A);
937 ev_io_stop (EV_A_ &sigev); 1434 ev_io_stop (EV_A_ &pipeev);
1435
1436#if EV_USE_EVENTFD
1437 if (evfd >= 0)
1438 close (evfd);
1439#endif
1440
1441 if (evpipe [0] >= 0)
1442 {
938 close (sigpipe [0]); 1443 close (evpipe [0]);
939 close (sigpipe [1]); 1444 close (evpipe [1]);
1445 }
940 1446
941 while (pipe (sigpipe))
942 syserr ("(libev) error creating pipe");
943
944 siginit (EV_A); 1447 evpipe_init (EV_A);
1448 /* now iterate over everything, in case we missed something */
1449 pipecb (EV_A_ &pipeev, EV_READ);
945 } 1450 }
946 1451
947 postfork = 0; 1452 postfork = 0;
948} 1453}
949 1454
… …
971} 1476}
972 1477
973void 1478void
974ev_loop_fork (EV_P) 1479ev_loop_fork (EV_P)
975{ 1480{
976 postfork = 1; 1481 postfork = 1; /* must be in line with ev_default_fork */
977} 1482}
978
979#endif 1483#endif
980 1484
981#if EV_MULTIPLICITY 1485#if EV_MULTIPLICITY
982struct ev_loop * 1486struct ev_loop *
983ev_default_loop_init (unsigned int flags) 1487ev_default_loop_init (unsigned int flags)
984#else 1488#else
985int 1489int
986ev_default_loop (unsigned int flags) 1490ev_default_loop (unsigned int flags)
987#endif 1491#endif
988{ 1492{
989 if (sigpipe [0] == sigpipe [1])
990 if (pipe (sigpipe))
991 return 0;
992
993 if (!ev_default_loop_ptr) 1493 if (!ev_default_loop_ptr)
994 { 1494 {
995#if EV_MULTIPLICITY 1495#if EV_MULTIPLICITY
996 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1496 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
997#else 1497#else
… …
1000 1500
1001 loop_init (EV_A_ flags); 1501 loop_init (EV_A_ flags);
1002 1502
1003 if (ev_backend (EV_A)) 1503 if (ev_backend (EV_A))
1004 { 1504 {
1005 siginit (EV_A);
1006
1007#ifndef _WIN32 1505#ifndef _WIN32
1008 ev_signal_init (&childev, childcb, SIGCHLD); 1506 ev_signal_init (&childev, childcb, SIGCHLD);
1009 ev_set_priority (&childev, EV_MAXPRI); 1507 ev_set_priority (&childev, EV_MAXPRI);
1010 ev_signal_start (EV_A_ &childev); 1508 ev_signal_start (EV_A_ &childev);
1011 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1509 ev_unref (EV_A); /* child watcher should not keep loop alive */
… …
1028#ifndef _WIN32 1526#ifndef _WIN32
1029 ev_ref (EV_A); /* child watcher */ 1527 ev_ref (EV_A); /* child watcher */
1030 ev_signal_stop (EV_A_ &childev); 1528 ev_signal_stop (EV_A_ &childev);
1031#endif 1529#endif
1032 1530
1033 ev_ref (EV_A); /* signal watcher */
1034 ev_io_stop (EV_A_ &sigev);
1035
1036 close (sigpipe [0]); sigpipe [0] = 0;
1037 close (sigpipe [1]); sigpipe [1] = 0;
1038
1039 loop_destroy (EV_A); 1531 loop_destroy (EV_A);
1040} 1532}
1041 1533
1042void 1534void
1043ev_default_fork (void) 1535ev_default_fork (void)
… …
1045#if EV_MULTIPLICITY 1537#if EV_MULTIPLICITY
1046 struct ev_loop *loop = ev_default_loop_ptr; 1538 struct ev_loop *loop = ev_default_loop_ptr;
1047#endif 1539#endif
1048 1540
1049 if (backend) 1541 if (backend)
1050 postfork = 1; 1542 postfork = 1; /* must be in line with ev_loop_fork */
1051} 1543}
1052 1544
1053/*****************************************************************************/ 1545/*****************************************************************************/
1054 1546
1055static int 1547void
1056any_pending (EV_P) 1548ev_invoke (EV_P_ void *w, int revents)
1057{ 1549{
1058 int pri; 1550 EV_CB_INVOKE ((W)w, revents);
1059
1060 for (pri = NUMPRI; pri--; )
1061 if (pendingcnt [pri])
1062 return 1;
1063
1064 return 0;
1065} 1551}
1066 1552
1067inline void 1553void inline_speed
1068call_pending (EV_P) 1554call_pending (EV_P)
1069{ 1555{
1070 int pri; 1556 int pri;
1071 1557
1072 for (pri = NUMPRI; pri--; ) 1558 for (pri = NUMPRI; pri--; )
… …
1074 { 1560 {
1075 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1561 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1076 1562
1077 if (expect_true (p->w)) 1563 if (expect_true (p->w))
1078 { 1564 {
1079 assert (("non-pending watcher on pending list", p->w->pending)); 1565 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1080 1566
1081 p->w->pending = 0; 1567 p->w->pending = 0;
1082 EV_CB_INVOKE (p->w, p->events); 1568 EV_CB_INVOKE (p->w, p->events);
1083 } 1569 }
1084 } 1570 }
1085} 1571}
1086 1572
1087inline void 1573#if EV_IDLE_ENABLE
1574void inline_size
1575idle_reify (EV_P)
1576{
1577 if (expect_false (idleall))
1578 {
1579 int pri;
1580
1581 for (pri = NUMPRI; pri--; )
1582 {
1583 if (pendingcnt [pri])
1584 break;
1585
1586 if (idlecnt [pri])
1587 {
1588 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1589 break;
1590 }
1591 }
1592 }
1593}
1594#endif
1595
1596void inline_size
1088timers_reify (EV_P) 1597timers_reify (EV_P)
1089{ 1598{
1090 while (timercnt && ((WT)timers [0])->at <= mn_now) 1599 while (timercnt && ANHE_at (timers [HEAP0]) <= mn_now)
1091 { 1600 {
1092 ev_timer *w = timers [0]; 1601 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1093 1602
1094 assert (("inactive timer on timer heap detected", ev_is_active (w))); 1603 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1095 1604
1096 /* first reschedule or stop timer */ 1605 /* first reschedule or stop timer */
1097 if (w->repeat) 1606 if (w->repeat)
1098 { 1607 {
1099 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1608 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1100 1609
1101 ((WT)w)->at += w->repeat; 1610 ev_at (w) += w->repeat;
1102 if (((WT)w)->at < mn_now) 1611 if (ev_at (w) < mn_now)
1103 ((WT)w)->at = mn_now; 1612 ev_at (w) = mn_now;
1104 1613
1105 downheap ((WT *)timers, timercnt, 0); 1614 downheap (timers, timercnt, HEAP0);
1106 } 1615 }
1107 else 1616 else
1108 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */ 1617 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1109 1618
1110 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 1619 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1111 } 1620 }
1112} 1621}
1113 1622
1114#if EV_PERIODICS 1623#if EV_PERIODIC_ENABLE
1115inline void 1624void inline_size
1116periodics_reify (EV_P) 1625periodics_reify (EV_P)
1117{ 1626{
1118 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 1627 while (periodiccnt && ANHE_at (periodics [HEAP0]) <= ev_rt_now)
1119 { 1628 {
1120 ev_periodic *w = periodics [0]; 1629 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1121 1630
1122 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1631 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1123 1632
1124 /* first reschedule or stop timer */ 1633 /* first reschedule or stop timer */
1125 if (w->reschedule_cb) 1634 if (w->reschedule_cb)
1126 { 1635 {
1127 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 1636 ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1128 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 1637 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
1129 downheap ((WT *)periodics, periodiccnt, 0); 1638 downheap (periodics, periodiccnt, 1);
1130 } 1639 }
1131 else if (w->interval) 1640 else if (w->interval)
1132 { 1641 {
1133 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; 1642 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1643 if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
1134 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now)); 1644 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
1135 downheap ((WT *)periodics, periodiccnt, 0); 1645 downheap (periodics, periodiccnt, HEAP0);
1136 } 1646 }
1137 else 1647 else
1138 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 1648 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1139 1649
1140 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 1650 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1141 } 1651 }
1142} 1652}
1143 1653
1144static void 1654static void noinline
1145periodics_reschedule (EV_P) 1655periodics_reschedule (EV_P)
1146{ 1656{
1147 int i; 1657 int i;
1148 1658
1149 /* adjust periodics after time jump */ 1659 /* adjust periodics after time jump */
1150 for (i = 0; i < periodiccnt; ++i) 1660 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1151 { 1661 {
1152 ev_periodic *w = periodics [i]; 1662 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1153 1663
1154 if (w->reschedule_cb) 1664 if (w->reschedule_cb)
1155 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 1665 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1156 else if (w->interval) 1666 else if (w->interval)
1157 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 1667 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1158 } 1668 }
1159 1669
1160 /* now rebuild the heap */ 1670 /* now rebuild the heap, this for the 2-heap, inefficient for the 4-heap, but correct */
1161 for (i = periodiccnt >> 1; i--; ) 1671 for (i = periodiccnt >> 1; --i; )
1162 downheap ((WT *)periodics, periodiccnt, i); 1672 downheap (periodics, periodiccnt, i + HEAP0);
1163} 1673}
1164#endif 1674#endif
1165 1675
1166inline int 1676void inline_speed
1167time_update_monotonic (EV_P) 1677time_update (EV_P_ ev_tstamp max_block)
1168{ 1678{
1679 int i;
1680
1681#if EV_USE_MONOTONIC
1682 if (expect_true (have_monotonic))
1683 {
1684 ev_tstamp odiff = rtmn_diff;
1685
1169 mn_now = get_clock (); 1686 mn_now = get_clock ();
1170 1687
1688 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1689 /* interpolate in the meantime */
1171 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 1690 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1172 { 1691 {
1173 ev_rt_now = rtmn_diff + mn_now; 1692 ev_rt_now = rtmn_diff + mn_now;
1174 return 0; 1693 return;
1175 } 1694 }
1176 else 1695
1177 {
1178 now_floor = mn_now; 1696 now_floor = mn_now;
1179 ev_rt_now = ev_time (); 1697 ev_rt_now = ev_time ();
1180 return 1;
1181 }
1182}
1183 1698
1184inline void 1699 /* loop a few times, before making important decisions.
1185time_update (EV_P) 1700 * on the choice of "4": one iteration isn't enough,
1186{ 1701 * in case we get preempted during the calls to
1187 int i; 1702 * ev_time and get_clock. a second call is almost guaranteed
1188 1703 * to succeed in that case, though. and looping a few more times
1189#if EV_USE_MONOTONIC 1704 * doesn't hurt either as we only do this on time-jumps or
1190 if (expect_true (have_monotonic)) 1705 * in the unlikely event of having been preempted here.
1191 { 1706 */
1192 if (time_update_monotonic (EV_A)) 1707 for (i = 4; --i; )
1193 { 1708 {
1194 ev_tstamp odiff = rtmn_diff; 1709 rtmn_diff = ev_rt_now - mn_now;
1195 1710
1196 /* loop a few times, before making important decisions. 1711 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1197 * on the choice of "4": one iteration isn't enough, 1712 return; /* all is well */
1198 * in case we get preempted during the calls to 1713
1199 * ev_time and get_clock. a second call is almost guarenteed 1714 ev_rt_now = ev_time ();
1200 * to succeed in that case, though. and looping a few more times 1715 mn_now = get_clock ();
1201 * doesn't hurt either as we only do this on time-jumps or 1716 now_floor = mn_now;
1202 * in the unlikely event of getting preempted here. 1717 }
1203 */ 1718
1204 for (i = 4; --i; ) 1719# if EV_PERIODIC_ENABLE
1720 periodics_reschedule (EV_A);
1721# endif
1722 /* no timer adjustment, as the monotonic clock doesn't jump */
1723 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1724 }
1725 else
1726#endif
1727 {
1728 ev_rt_now = ev_time ();
1729
1730 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1731 {
1732#if EV_PERIODIC_ENABLE
1733 periodics_reschedule (EV_A);
1734#endif
1735 /* adjust timers. this is easy, as the offset is the same for all of them */
1736 for (i = 0; i < timercnt; ++i)
1205 { 1737 {
1206 rtmn_diff = ev_rt_now - mn_now; 1738 ANHE *he = timers + i + HEAP0;
1207 1739 ANHE_w (*he)->at += ev_rt_now - mn_now;
1208 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1740 ANHE_at_set (*he);
1209 return; /* all is well */
1210
1211 ev_rt_now = ev_time ();
1212 mn_now = get_clock ();
1213 now_floor = mn_now;
1214 } 1741 }
1215
1216# if EV_PERIODICS
1217 periodics_reschedule (EV_A);
1218# endif
1219 /* no timer adjustment, as the monotonic clock doesn't jump */
1220 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1221 } 1742 }
1222 }
1223 else
1224#endif
1225 {
1226 ev_rt_now = ev_time ();
1227
1228 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1229 {
1230#if EV_PERIODICS
1231 periodics_reschedule (EV_A);
1232#endif
1233
1234 /* adjust timers. this is easy, as the offset is the same for all */
1235 for (i = 0; i < timercnt; ++i)
1236 ((WT)timers [i])->at += ev_rt_now - mn_now;
1237 }
1238 1743
1239 mn_now = ev_rt_now; 1744 mn_now = ev_rt_now;
1240 } 1745 }
1241} 1746}
1242 1747
… …
1255static int loop_done; 1760static int loop_done;
1256 1761
1257void 1762void
1258ev_loop (EV_P_ int flags) 1763ev_loop (EV_P_ int flags)
1259{ 1764{
1260 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 1765 loop_done = EVUNLOOP_CANCEL;
1261 ? EVUNLOOP_ONE
1262 : EVUNLOOP_CANCEL;
1263 1766
1264 while (activecnt) 1767 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1768
1769 do
1265 { 1770 {
1771#ifndef _WIN32
1772 if (expect_false (curpid)) /* penalise the forking check even more */
1773 if (expect_false (getpid () != curpid))
1774 {
1775 curpid = getpid ();
1776 postfork = 1;
1777 }
1778#endif
1779
1780#if EV_FORK_ENABLE
1781 /* we might have forked, so queue fork handlers */
1782 if (expect_false (postfork))
1783 if (forkcnt)
1784 {
1785 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1786 call_pending (EV_A);
1787 }
1788#endif
1789
1266 /* queue check watchers (and execute them) */ 1790 /* queue prepare watchers (and execute them) */
1267 if (expect_false (preparecnt)) 1791 if (expect_false (preparecnt))
1268 { 1792 {
1269 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 1793 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1270 call_pending (EV_A); 1794 call_pending (EV_A);
1271 } 1795 }
1272 1796
1797 if (expect_false (!activecnt))
1798 break;
1799
1273 /* we might have forked, so reify kernel state if necessary */ 1800 /* we might have forked, so reify kernel state if necessary */
1274 if (expect_false (postfork)) 1801 if (expect_false (postfork))
1275 loop_fork (EV_A); 1802 loop_fork (EV_A);
1276 1803
1277 /* update fd-related kernel structures */ 1804 /* update fd-related kernel structures */
1278 fd_reify (EV_A); 1805 fd_reify (EV_A);
1279 1806
1280 /* calculate blocking time */ 1807 /* calculate blocking time */
1281 { 1808 {
1282 double block; 1809 ev_tstamp waittime = 0.;
1810 ev_tstamp sleeptime = 0.;
1283 1811
1284 if (flags & EVLOOP_NONBLOCK || idlecnt) 1812 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1285 block = 0.; /* do not block at all */
1286 else
1287 { 1813 {
1288 /* update time to cancel out callback processing overhead */ 1814 /* update time to cancel out callback processing overhead */
1289#if EV_USE_MONOTONIC
1290 if (expect_true (have_monotonic))
1291 time_update_monotonic (EV_A); 1815 time_update (EV_A_ 1e100);
1292 else
1293#endif
1294 {
1295 ev_rt_now = ev_time ();
1296 mn_now = ev_rt_now;
1297 }
1298 1816
1299 block = MAX_BLOCKTIME; 1817 waittime = MAX_BLOCKTIME;
1300 1818
1301 if (timercnt) 1819 if (timercnt)
1302 { 1820 {
1303 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 1821 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1304 if (block > to) block = to; 1822 if (waittime > to) waittime = to;
1305 } 1823 }
1306 1824
1307#if EV_PERIODICS 1825#if EV_PERIODIC_ENABLE
1308 if (periodiccnt) 1826 if (periodiccnt)
1309 { 1827 {
1310 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 1828 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1311 if (block > to) block = to; 1829 if (waittime > to) waittime = to;
1312 } 1830 }
1313#endif 1831#endif
1314 1832
1315 if (expect_false (block < 0.)) block = 0.; 1833 if (expect_false (waittime < timeout_blocktime))
1834 waittime = timeout_blocktime;
1835
1836 sleeptime = waittime - backend_fudge;
1837
1838 if (expect_true (sleeptime > io_blocktime))
1839 sleeptime = io_blocktime;
1840
1841 if (sleeptime)
1842 {
1843 ev_sleep (sleeptime);
1844 waittime -= sleeptime;
1845 }
1316 } 1846 }
1317 1847
1848 ++loop_count;
1318 backend_poll (EV_A_ block); 1849 backend_poll (EV_A_ waittime);
1850
1851 /* update ev_rt_now, do magic */
1852 time_update (EV_A_ waittime + sleeptime);
1319 } 1853 }
1320
1321 /* update ev_rt_now, do magic */
1322 time_update (EV_A);
1323 1854
1324 /* queue pending timers and reschedule them */ 1855 /* queue pending timers and reschedule them */
1325 timers_reify (EV_A); /* relative timers called last */ 1856 timers_reify (EV_A); /* relative timers called last */
1326#if EV_PERIODICS 1857#if EV_PERIODIC_ENABLE
1327 periodics_reify (EV_A); /* absolute timers called first */ 1858 periodics_reify (EV_A); /* absolute timers called first */
1328#endif 1859#endif
1329 1860
1861#if EV_IDLE_ENABLE
1330 /* queue idle watchers unless other events are pending */ 1862 /* queue idle watchers unless other events are pending */
1331 if (idlecnt && !any_pending (EV_A)) 1863 idle_reify (EV_A);
1332 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 1864#endif
1333 1865
1334 /* queue check watchers, to be executed first */ 1866 /* queue check watchers, to be executed first */
1335 if (expect_false (checkcnt)) 1867 if (expect_false (checkcnt))
1336 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 1868 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1337 1869
1338 call_pending (EV_A); 1870 call_pending (EV_A);
1339
1340 if (expect_false (loop_done))
1341 break;
1342 } 1871 }
1872 while (expect_true (
1873 activecnt
1874 && !loop_done
1875 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
1876 ));
1343 1877
1344 if (loop_done == EVUNLOOP_ONE) 1878 if (loop_done == EVUNLOOP_ONE)
1345 loop_done = EVUNLOOP_CANCEL; 1879 loop_done = EVUNLOOP_CANCEL;
1346} 1880}
1347 1881
… …
1351 loop_done = how; 1885 loop_done = how;
1352} 1886}
1353 1887
1354/*****************************************************************************/ 1888/*****************************************************************************/
1355 1889
1356inline void 1890void inline_size
1357wlist_add (WL *head, WL elem) 1891wlist_add (WL *head, WL elem)
1358{ 1892{
1359 elem->next = *head; 1893 elem->next = *head;
1360 *head = elem; 1894 *head = elem;
1361} 1895}
1362 1896
1363inline void 1897void inline_size
1364wlist_del (WL *head, WL elem) 1898wlist_del (WL *head, WL elem)
1365{ 1899{
1366 while (*head) 1900 while (*head)
1367 { 1901 {
1368 if (*head == elem) 1902 if (*head == elem)
… …
1373 1907
1374 head = &(*head)->next; 1908 head = &(*head)->next;
1375 } 1909 }
1376} 1910}
1377 1911
1378inline void 1912void inline_speed
1379ev_clear_pending (EV_P_ W w) 1913clear_pending (EV_P_ W w)
1380{ 1914{
1381 if (w->pending) 1915 if (w->pending)
1382 { 1916 {
1383 pendings [ABSPRI (w)][w->pending - 1].w = 0; 1917 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1384 w->pending = 0; 1918 w->pending = 0;
1385 } 1919 }
1386} 1920}
1387 1921
1388inline void 1922int
1923ev_clear_pending (EV_P_ void *w)
1924{
1925 W w_ = (W)w;
1926 int pending = w_->pending;
1927
1928 if (expect_true (pending))
1929 {
1930 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
1931 w_->pending = 0;
1932 p->w = 0;
1933 return p->events;
1934 }
1935 else
1936 return 0;
1937}
1938
1939void inline_size
1940pri_adjust (EV_P_ W w)
1941{
1942 int pri = w->priority;
1943 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1944 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1945 w->priority = pri;
1946}
1947
1948void inline_speed
1389ev_start (EV_P_ W w, int active) 1949ev_start (EV_P_ W w, int active)
1390{ 1950{
1391 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 1951 pri_adjust (EV_A_ w);
1392 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1393
1394 w->active = active; 1952 w->active = active;
1395 ev_ref (EV_A); 1953 ev_ref (EV_A);
1396} 1954}
1397 1955
1398inline void 1956void inline_size
1399ev_stop (EV_P_ W w) 1957ev_stop (EV_P_ W w)
1400{ 1958{
1401 ev_unref (EV_A); 1959 ev_unref (EV_A);
1402 w->active = 0; 1960 w->active = 0;
1403} 1961}
1404 1962
1405/*****************************************************************************/ 1963/*****************************************************************************/
1406 1964
1407void 1965void noinline
1408ev_io_start (EV_P_ ev_io *w) 1966ev_io_start (EV_P_ ev_io *w)
1409{ 1967{
1410 int fd = w->fd; 1968 int fd = w->fd;
1411 1969
1412 if (expect_false (ev_is_active (w))) 1970 if (expect_false (ev_is_active (w)))
… …
1414 1972
1415 assert (("ev_io_start called with negative fd", fd >= 0)); 1973 assert (("ev_io_start called with negative fd", fd >= 0));
1416 1974
1417 ev_start (EV_A_ (W)w, 1); 1975 ev_start (EV_A_ (W)w, 1);
1418 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 1976 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1419 wlist_add ((WL *)&anfds[fd].head, (WL)w); 1977 wlist_add (&anfds[fd].head, (WL)w);
1420 1978
1421 fd_change (EV_A_ fd); 1979 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1);
1980 w->events &= ~EV_IOFDSET;
1422} 1981}
1423 1982
1424void 1983void noinline
1425ev_io_stop (EV_P_ ev_io *w) 1984ev_io_stop (EV_P_ ev_io *w)
1426{ 1985{
1427 ev_clear_pending (EV_A_ (W)w); 1986 clear_pending (EV_A_ (W)w);
1428 if (expect_false (!ev_is_active (w))) 1987 if (expect_false (!ev_is_active (w)))
1429 return; 1988 return;
1430 1989
1431 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 1990 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1432 1991
1433 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 1992 wlist_del (&anfds[w->fd].head, (WL)w);
1434 ev_stop (EV_A_ (W)w); 1993 ev_stop (EV_A_ (W)w);
1435 1994
1436 fd_change (EV_A_ w->fd); 1995 fd_change (EV_A_ w->fd, 1);
1437} 1996}
1438 1997
1439void 1998void noinline
1440ev_timer_start (EV_P_ ev_timer *w) 1999ev_timer_start (EV_P_ ev_timer *w)
1441{ 2000{
1442 if (expect_false (ev_is_active (w))) 2001 if (expect_false (ev_is_active (w)))
1443 return; 2002 return;
1444 2003
1445 ((WT)w)->at += mn_now; 2004 ev_at (w) += mn_now;
1446 2005
1447 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2006 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1448 2007
1449 ev_start (EV_A_ (W)w, ++timercnt); 2008 ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
1450 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 2009 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1451 timers [timercnt - 1] = w; 2010 ANHE_w (timers [ev_active (w)]) = (WT)w;
1452 upheap ((WT *)timers, timercnt - 1); 2011 ANHE_at_set (timers [ev_active (w)]);
2012 upheap (timers, ev_active (w));
1453 2013
1454 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2014 /*assert (("internal timer heap corruption", timers [ev_active (w)] == w));*/
1455} 2015}
1456 2016
1457void 2017void noinline
1458ev_timer_stop (EV_P_ ev_timer *w) 2018ev_timer_stop (EV_P_ ev_timer *w)
1459{ 2019{
1460 ev_clear_pending (EV_A_ (W)w); 2020 clear_pending (EV_A_ (W)w);
1461 if (expect_false (!ev_is_active (w))) 2021 if (expect_false (!ev_is_active (w)))
1462 return; 2022 return;
1463 2023
2024 {
2025 int active = ev_active (w);
2026
1464 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2027 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1465 2028
1466 if (expect_true (((W)w)->active < timercnt--)) 2029 if (expect_true (active < timercnt + HEAP0 - 1))
1467 { 2030 {
1468 timers [((W)w)->active - 1] = timers [timercnt]; 2031 timers [active] = timers [timercnt + HEAP0 - 1];
1469 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2032 adjustheap (timers, timercnt, active);
1470 } 2033 }
1471 2034
1472 ((WT)w)->at -= mn_now; 2035 --timercnt;
2036 }
2037
2038 ev_at (w) -= mn_now;
1473 2039
1474 ev_stop (EV_A_ (W)w); 2040 ev_stop (EV_A_ (W)w);
1475} 2041}
1476 2042
1477void 2043void noinline
1478ev_timer_again (EV_P_ ev_timer *w) 2044ev_timer_again (EV_P_ ev_timer *w)
1479{ 2045{
1480 if (ev_is_active (w)) 2046 if (ev_is_active (w))
1481 { 2047 {
1482 if (w->repeat) 2048 if (w->repeat)
1483 { 2049 {
1484 ((WT)w)->at = mn_now + w->repeat; 2050 ev_at (w) = mn_now + w->repeat;
2051 ANHE_at_set (timers [ev_active (w)]);
1485 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2052 adjustheap (timers, timercnt, ev_active (w));
1486 } 2053 }
1487 else 2054 else
1488 ev_timer_stop (EV_A_ w); 2055 ev_timer_stop (EV_A_ w);
1489 } 2056 }
1490 else if (w->repeat) 2057 else if (w->repeat)
1491 { 2058 {
1492 w->at = w->repeat; 2059 ev_at (w) = w->repeat;
1493 ev_timer_start (EV_A_ w); 2060 ev_timer_start (EV_A_ w);
1494 } 2061 }
1495} 2062}
1496 2063
1497#if EV_PERIODICS 2064#if EV_PERIODIC_ENABLE
1498void 2065void noinline
1499ev_periodic_start (EV_P_ ev_periodic *w) 2066ev_periodic_start (EV_P_ ev_periodic *w)
1500{ 2067{
1501 if (expect_false (ev_is_active (w))) 2068 if (expect_false (ev_is_active (w)))
1502 return; 2069 return;
1503 2070
1504 if (w->reschedule_cb) 2071 if (w->reschedule_cb)
1505 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2072 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1506 else if (w->interval) 2073 else if (w->interval)
1507 { 2074 {
1508 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2075 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1509 /* this formula differs from the one in periodic_reify because we do not always round up */ 2076 /* this formula differs from the one in periodic_reify because we do not always round up */
1510 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2077 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1511 } 2078 }
2079 else
2080 ev_at (w) = w->offset;
1512 2081
1513 ev_start (EV_A_ (W)w, ++periodiccnt); 2082 ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1514 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 2083 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1515 periodics [periodiccnt - 1] = w; 2084 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1516 upheap ((WT *)periodics, periodiccnt - 1); 2085 upheap (periodics, ev_active (w));
1517 2086
1518 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2087 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1519} 2088}
1520 2089
1521void 2090void noinline
1522ev_periodic_stop (EV_P_ ev_periodic *w) 2091ev_periodic_stop (EV_P_ ev_periodic *w)
1523{ 2092{
1524 ev_clear_pending (EV_A_ (W)w); 2093 clear_pending (EV_A_ (W)w);
1525 if (expect_false (!ev_is_active (w))) 2094 if (expect_false (!ev_is_active (w)))
1526 return; 2095 return;
1527 2096
2097 {
2098 int active = ev_active (w);
2099
1528 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2100 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1529 2101
1530 if (expect_true (((W)w)->active < periodiccnt--)) 2102 if (expect_true (active < periodiccnt + HEAP0 - 1))
1531 { 2103 {
1532 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2104 periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1533 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2105 adjustheap (periodics, periodiccnt, active);
1534 } 2106 }
2107
2108 --periodiccnt;
2109 }
1535 2110
1536 ev_stop (EV_A_ (W)w); 2111 ev_stop (EV_A_ (W)w);
1537} 2112}
1538 2113
1539void 2114void noinline
1540ev_periodic_again (EV_P_ ev_periodic *w) 2115ev_periodic_again (EV_P_ ev_periodic *w)
1541{ 2116{
1542 /* TODO: use adjustheap and recalculation */ 2117 /* TODO: use adjustheap and recalculation */
1543 ev_periodic_stop (EV_A_ w); 2118 ev_periodic_stop (EV_A_ w);
1544 ev_periodic_start (EV_A_ w); 2119 ev_periodic_start (EV_A_ w);
1545} 2120}
1546#endif 2121#endif
1547 2122
1548void 2123#ifndef SA_RESTART
2124# define SA_RESTART 0
2125#endif
2126
2127void noinline
1549ev_idle_start (EV_P_ ev_idle *w) 2128ev_signal_start (EV_P_ ev_signal *w)
1550{ 2129{
2130#if EV_MULTIPLICITY
2131 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2132#endif
1551 if (expect_false (ev_is_active (w))) 2133 if (expect_false (ev_is_active (w)))
1552 return; 2134 return;
1553 2135
2136 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
2137
2138 evpipe_init (EV_A);
2139
2140 {
2141#ifndef _WIN32
2142 sigset_t full, prev;
2143 sigfillset (&full);
2144 sigprocmask (SIG_SETMASK, &full, &prev);
2145#endif
2146
2147 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
2148
2149#ifndef _WIN32
2150 sigprocmask (SIG_SETMASK, &prev, 0);
2151#endif
2152 }
2153
1554 ev_start (EV_A_ (W)w, ++idlecnt); 2154 ev_start (EV_A_ (W)w, 1);
1555 array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2); 2155 wlist_add (&signals [w->signum - 1].head, (WL)w);
1556 idles [idlecnt - 1] = w;
1557}
1558 2156
1559void 2157 if (!((WL)w)->next)
2158 {
2159#if _WIN32
2160 signal (w->signum, ev_sighandler);
2161#else
2162 struct sigaction sa;
2163 sa.sa_handler = ev_sighandler;
2164 sigfillset (&sa.sa_mask);
2165 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2166 sigaction (w->signum, &sa, 0);
2167#endif
2168 }
2169}
2170
2171void noinline
1560ev_idle_stop (EV_P_ ev_idle *w) 2172ev_signal_stop (EV_P_ ev_signal *w)
1561{ 2173{
1562 ev_clear_pending (EV_A_ (W)w); 2174 clear_pending (EV_A_ (W)w);
1563 if (expect_false (!ev_is_active (w))) 2175 if (expect_false (!ev_is_active (w)))
1564 return; 2176 return;
1565 2177
2178 wlist_del (&signals [w->signum - 1].head, (WL)w);
2179 ev_stop (EV_A_ (W)w);
2180
2181 if (!signals [w->signum - 1].head)
2182 signal (w->signum, SIG_DFL);
2183}
2184
2185void
2186ev_child_start (EV_P_ ev_child *w)
2187{
2188#if EV_MULTIPLICITY
2189 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2190#endif
2191 if (expect_false (ev_is_active (w)))
2192 return;
2193
2194 ev_start (EV_A_ (W)w, 1);
2195 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2196}
2197
2198void
2199ev_child_stop (EV_P_ ev_child *w)
2200{
2201 clear_pending (EV_A_ (W)w);
2202 if (expect_false (!ev_is_active (w)))
2203 return;
2204
2205 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2206 ev_stop (EV_A_ (W)w);
2207}
2208
2209#if EV_STAT_ENABLE
2210
2211# ifdef _WIN32
2212# undef lstat
2213# define lstat(a,b) _stati64 (a,b)
2214# endif
2215
2216#define DEF_STAT_INTERVAL 5.0074891
2217#define MIN_STAT_INTERVAL 0.1074891
2218
2219static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2220
2221#if EV_USE_INOTIFY
2222# define EV_INOTIFY_BUFSIZE 8192
2223
2224static void noinline
2225infy_add (EV_P_ ev_stat *w)
2226{
2227 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);
2228
2229 if (w->wd < 0)
2230 {
2231 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2232
2233 /* monitor some parent directory for speedup hints */
2234 /* note that exceeding the hardcoded limit is not a correctness issue, */
2235 /* but an efficiency issue only */
2236 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2237 {
2238 char path [4096];
2239 strcpy (path, w->path);
2240
2241 do
2242 {
2243 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2244 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2245
2246 char *pend = strrchr (path, '/');
2247
2248 if (!pend)
2249 break; /* whoops, no '/', complain to your admin */
2250
2251 *pend = 0;
2252 w->wd = inotify_add_watch (fs_fd, path, mask);
2253 }
2254 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2255 }
2256 }
2257 else
2258 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2259
2260 if (w->wd >= 0)
2261 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2262}
2263
2264static void noinline
2265infy_del (EV_P_ ev_stat *w)
2266{
2267 int slot;
2268 int wd = w->wd;
2269
2270 if (wd < 0)
2271 return;
2272
2273 w->wd = -2;
2274 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2275 wlist_del (&fs_hash [slot].head, (WL)w);
2276
2277 /* remove this watcher, if others are watching it, they will rearm */
2278 inotify_rm_watch (fs_fd, wd);
2279}
2280
2281static void noinline
2282infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2283{
2284 if (slot < 0)
2285 /* overflow, need to check for all hahs slots */
2286 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2287 infy_wd (EV_A_ slot, wd, ev);
2288 else
2289 {
2290 WL w_;
2291
2292 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2293 {
2294 ev_stat *w = (ev_stat *)w_;
2295 w_ = w_->next; /* lets us remove this watcher and all before it */
2296
2297 if (w->wd == wd || wd == -1)
2298 {
2299 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2300 {
2301 w->wd = -1;
2302 infy_add (EV_A_ w); /* re-add, no matter what */
2303 }
2304
2305 stat_timer_cb (EV_A_ &w->timer, 0);
2306 }
2307 }
2308 }
2309}
2310
2311static void
2312infy_cb (EV_P_ ev_io *w, int revents)
2313{
2314 char buf [EV_INOTIFY_BUFSIZE];
2315 struct inotify_event *ev = (struct inotify_event *)buf;
2316 int ofs;
2317 int len = read (fs_fd, buf, sizeof (buf));
2318
2319 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2320 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2321}
2322
2323void inline_size
2324infy_init (EV_P)
2325{
2326 if (fs_fd != -2)
2327 return;
2328
2329 fs_fd = inotify_init ();
2330
2331 if (fs_fd >= 0)
2332 {
2333 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2334 ev_set_priority (&fs_w, EV_MAXPRI);
2335 ev_io_start (EV_A_ &fs_w);
2336 }
2337}
2338
2339void inline_size
2340infy_fork (EV_P)
2341{
2342 int slot;
2343
2344 if (fs_fd < 0)
2345 return;
2346
2347 close (fs_fd);
2348 fs_fd = inotify_init ();
2349
2350 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2351 {
2352 WL w_ = fs_hash [slot].head;
2353 fs_hash [slot].head = 0;
2354
2355 while (w_)
2356 {
2357 ev_stat *w = (ev_stat *)w_;
2358 w_ = w_->next; /* lets us add this watcher */
2359
2360 w->wd = -1;
2361
2362 if (fs_fd >= 0)
2363 infy_add (EV_A_ w); /* re-add, no matter what */
2364 else
2365 ev_timer_start (EV_A_ &w->timer);
2366 }
2367
2368 }
2369}
2370
2371#endif
2372
2373void
2374ev_stat_stat (EV_P_ ev_stat *w)
2375{
2376 if (lstat (w->path, &w->attr) < 0)
2377 w->attr.st_nlink = 0;
2378 else if (!w->attr.st_nlink)
2379 w->attr.st_nlink = 1;
2380}
2381
2382static void noinline
2383stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2384{
2385 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2386
2387 /* we copy this here each the time so that */
2388 /* prev has the old value when the callback gets invoked */
2389 w->prev = w->attr;
2390 ev_stat_stat (EV_A_ w);
2391
2392 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2393 if (
2394 w->prev.st_dev != w->attr.st_dev
2395 || w->prev.st_ino != w->attr.st_ino
2396 || w->prev.st_mode != w->attr.st_mode
2397 || w->prev.st_nlink != w->attr.st_nlink
2398 || w->prev.st_uid != w->attr.st_uid
2399 || w->prev.st_gid != w->attr.st_gid
2400 || w->prev.st_rdev != w->attr.st_rdev
2401 || w->prev.st_size != w->attr.st_size
2402 || w->prev.st_atime != w->attr.st_atime
2403 || w->prev.st_mtime != w->attr.st_mtime
2404 || w->prev.st_ctime != w->attr.st_ctime
2405 ) {
2406 #if EV_USE_INOTIFY
2407 infy_del (EV_A_ w);
2408 infy_add (EV_A_ w);
2409 ev_stat_stat (EV_A_ w); /* avoid race... */
2410 #endif
2411
2412 ev_feed_event (EV_A_ w, EV_STAT);
2413 }
2414}
2415
2416void
2417ev_stat_start (EV_P_ ev_stat *w)
2418{
2419 if (expect_false (ev_is_active (w)))
2420 return;
2421
2422 /* since we use memcmp, we need to clear any padding data etc. */
2423 memset (&w->prev, 0, sizeof (ev_statdata));
2424 memset (&w->attr, 0, sizeof (ev_statdata));
2425
2426 ev_stat_stat (EV_A_ w);
2427
2428 if (w->interval < MIN_STAT_INTERVAL)
2429 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2430
2431 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
2432 ev_set_priority (&w->timer, ev_priority (w));
2433
2434#if EV_USE_INOTIFY
2435 infy_init (EV_A);
2436
2437 if (fs_fd >= 0)
2438 infy_add (EV_A_ w);
2439 else
2440#endif
2441 ev_timer_start (EV_A_ &w->timer);
2442
2443 ev_start (EV_A_ (W)w, 1);
2444}
2445
2446void
2447ev_stat_stop (EV_P_ ev_stat *w)
2448{
2449 clear_pending (EV_A_ (W)w);
2450 if (expect_false (!ev_is_active (w)))
2451 return;
2452
2453#if EV_USE_INOTIFY
2454 infy_del (EV_A_ w);
2455#endif
2456 ev_timer_stop (EV_A_ &w->timer);
2457
2458 ev_stop (EV_A_ (W)w);
2459}
2460#endif
2461
2462#if EV_IDLE_ENABLE
2463void
2464ev_idle_start (EV_P_ ev_idle *w)
2465{
2466 if (expect_false (ev_is_active (w)))
2467 return;
2468
2469 pri_adjust (EV_A_ (W)w);
2470
1566 { 2471 {
1567 int active = ((W)w)->active; 2472 int active = ++idlecnt [ABSPRI (w)];
1568 idles [active - 1] = idles [--idlecnt]; 2473
1569 ((W)idles [active - 1])->active = active; 2474 ++idleall;
2475 ev_start (EV_A_ (W)w, active);
2476
2477 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2478 idles [ABSPRI (w)][active - 1] = w;
1570 } 2479 }
2480}
1571 2481
2482void
2483ev_idle_stop (EV_P_ ev_idle *w)
2484{
2485 clear_pending (EV_A_ (W)w);
2486 if (expect_false (!ev_is_active (w)))
2487 return;
2488
2489 {
2490 int active = ev_active (w);
2491
2492 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2493 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2494
1572 ev_stop (EV_A_ (W)w); 2495 ev_stop (EV_A_ (W)w);
2496 --idleall;
2497 }
1573} 2498}
2499#endif
1574 2500
1575void 2501void
1576ev_prepare_start (EV_P_ ev_prepare *w) 2502ev_prepare_start (EV_P_ ev_prepare *w)
1577{ 2503{
1578 if (expect_false (ev_is_active (w))) 2504 if (expect_false (ev_is_active (w)))
… …
1584} 2510}
1585 2511
1586void 2512void
1587ev_prepare_stop (EV_P_ ev_prepare *w) 2513ev_prepare_stop (EV_P_ ev_prepare *w)
1588{ 2514{
1589 ev_clear_pending (EV_A_ (W)w); 2515 clear_pending (EV_A_ (W)w);
1590 if (expect_false (!ev_is_active (w))) 2516 if (expect_false (!ev_is_active (w)))
1591 return; 2517 return;
1592 2518
1593 { 2519 {
1594 int active = ((W)w)->active; 2520 int active = ev_active (w);
2521
1595 prepares [active - 1] = prepares [--preparecnt]; 2522 prepares [active - 1] = prepares [--preparecnt];
1596 ((W)prepares [active - 1])->active = active; 2523 ev_active (prepares [active - 1]) = active;
1597 } 2524 }
1598 2525
1599 ev_stop (EV_A_ (W)w); 2526 ev_stop (EV_A_ (W)w);
1600} 2527}
1601 2528
… …
1611} 2538}
1612 2539
1613void 2540void
1614ev_check_stop (EV_P_ ev_check *w) 2541ev_check_stop (EV_P_ ev_check *w)
1615{ 2542{
1616 ev_clear_pending (EV_A_ (W)w); 2543 clear_pending (EV_A_ (W)w);
1617 if (expect_false (!ev_is_active (w))) 2544 if (expect_false (!ev_is_active (w)))
1618 return; 2545 return;
1619 2546
1620 { 2547 {
1621 int active = ((W)w)->active; 2548 int active = ev_active (w);
2549
1622 checks [active - 1] = checks [--checkcnt]; 2550 checks [active - 1] = checks [--checkcnt];
1623 ((W)checks [active - 1])->active = active; 2551 ev_active (checks [active - 1]) = active;
1624 } 2552 }
1625 2553
1626 ev_stop (EV_A_ (W)w); 2554 ev_stop (EV_A_ (W)w);
1627} 2555}
1628 2556
1629#ifndef SA_RESTART 2557#if EV_EMBED_ENABLE
1630# define SA_RESTART 0 2558void noinline
1631#endif
1632
1633void
1634ev_signal_start (EV_P_ ev_signal *w)
1635{
1636#if EV_MULTIPLICITY
1637 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1638#endif
1639 if (expect_false (ev_is_active (w)))
1640 return;
1641
1642 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1643
1644 ev_start (EV_A_ (W)w, 1);
1645 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1646 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1647
1648 if (!((WL)w)->next)
1649 {
1650#if _WIN32
1651 signal (w->signum, sighandler);
1652#else
1653 struct sigaction sa;
1654 sa.sa_handler = sighandler;
1655 sigfillset (&sa.sa_mask);
1656 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1657 sigaction (w->signum, &sa, 0);
1658#endif
1659 }
1660}
1661
1662void
1663ev_signal_stop (EV_P_ ev_signal *w)
1664{
1665 ev_clear_pending (EV_A_ (W)w);
1666 if (expect_false (!ev_is_active (w)))
1667 return;
1668
1669 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1670 ev_stop (EV_A_ (W)w);
1671
1672 if (!signals [w->signum - 1].head)
1673 signal (w->signum, SIG_DFL);
1674}
1675
1676void
1677ev_child_start (EV_P_ ev_child *w)
1678{
1679#if EV_MULTIPLICITY
1680 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1681#endif
1682 if (expect_false (ev_is_active (w)))
1683 return;
1684
1685 ev_start (EV_A_ (W)w, 1);
1686 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1687}
1688
1689void
1690ev_child_stop (EV_P_ ev_child *w)
1691{
1692 ev_clear_pending (EV_A_ (W)w);
1693 if (expect_false (!ev_is_active (w)))
1694 return;
1695
1696 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1697 ev_stop (EV_A_ (W)w);
1698}
1699
1700#if EV_MULTIPLICITY
1701void
1702ev_embed_sweep (EV_P_ ev_embed *w) 2559ev_embed_sweep (EV_P_ ev_embed *w)
1703{ 2560{
1704 ev_loop (w->loop, EVLOOP_NONBLOCK); 2561 ev_loop (w->other, EVLOOP_NONBLOCK);
1705} 2562}
1706 2563
1707static void 2564static void
1708embed_cb (EV_P_ ev_io *io, int revents) 2565embed_io_cb (EV_P_ ev_io *io, int revents)
1709{ 2566{
1710 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 2567 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
1711 2568
1712 if (ev_cb (w)) 2569 if (ev_cb (w))
1713 ev_feed_event (EV_A_ (W)w, EV_EMBED); 2570 ev_feed_event (EV_A_ (W)w, EV_EMBED);
1714 else 2571 else
1715 ev_embed_sweep (loop, w); 2572 ev_loop (w->other, EVLOOP_NONBLOCK);
1716} 2573}
2574
2575static void
2576embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2577{
2578 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2579
2580 {
2581 struct ev_loop *loop = w->other;
2582
2583 while (fdchangecnt)
2584 {
2585 fd_reify (EV_A);
2586 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2587 }
2588 }
2589}
2590
2591#if 0
2592static void
2593embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2594{
2595 ev_idle_stop (EV_A_ idle);
2596}
2597#endif
1717 2598
1718void 2599void
1719ev_embed_start (EV_P_ ev_embed *w) 2600ev_embed_start (EV_P_ ev_embed *w)
1720{ 2601{
1721 if (expect_false (ev_is_active (w))) 2602 if (expect_false (ev_is_active (w)))
1722 return; 2603 return;
1723 2604
1724 { 2605 {
1725 struct ev_loop *loop = w->loop; 2606 struct ev_loop *loop = w->other;
1726 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 2607 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
1727 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 2608 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
1728 } 2609 }
1729 2610
1730 ev_set_priority (&w->io, ev_priority (w)); 2611 ev_set_priority (&w->io, ev_priority (w));
1731 ev_io_start (EV_A_ &w->io); 2612 ev_io_start (EV_A_ &w->io);
2613
2614 ev_prepare_init (&w->prepare, embed_prepare_cb);
2615 ev_set_priority (&w->prepare, EV_MINPRI);
2616 ev_prepare_start (EV_A_ &w->prepare);
2617
2618 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2619
1732 ev_start (EV_A_ (W)w, 1); 2620 ev_start (EV_A_ (W)w, 1);
1733} 2621}
1734 2622
1735void 2623void
1736ev_embed_stop (EV_P_ ev_embed *w) 2624ev_embed_stop (EV_P_ ev_embed *w)
1737{ 2625{
1738 ev_clear_pending (EV_A_ (W)w); 2626 clear_pending (EV_A_ (W)w);
1739 if (expect_false (!ev_is_active (w))) 2627 if (expect_false (!ev_is_active (w)))
1740 return; 2628 return;
1741 2629
1742 ev_io_stop (EV_A_ &w->io); 2630 ev_io_stop (EV_A_ &w->io);
2631 ev_prepare_stop (EV_A_ &w->prepare);
2632
1743 ev_stop (EV_A_ (W)w); 2633 ev_stop (EV_A_ (W)w);
2634}
2635#endif
2636
2637#if EV_FORK_ENABLE
2638void
2639ev_fork_start (EV_P_ ev_fork *w)
2640{
2641 if (expect_false (ev_is_active (w)))
2642 return;
2643
2644 ev_start (EV_A_ (W)w, ++forkcnt);
2645 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2646 forks [forkcnt - 1] = w;
2647}
2648
2649void
2650ev_fork_stop (EV_P_ ev_fork *w)
2651{
2652 clear_pending (EV_A_ (W)w);
2653 if (expect_false (!ev_is_active (w)))
2654 return;
2655
2656 {
2657 int active = ev_active (w);
2658
2659 forks [active - 1] = forks [--forkcnt];
2660 ev_active (forks [active - 1]) = active;
2661 }
2662
2663 ev_stop (EV_A_ (W)w);
2664}
2665#endif
2666
2667#if EV_ASYNC_ENABLE
2668void
2669ev_async_start (EV_P_ ev_async *w)
2670{
2671 if (expect_false (ev_is_active (w)))
2672 return;
2673
2674 evpipe_init (EV_A);
2675
2676 ev_start (EV_A_ (W)w, ++asynccnt);
2677 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
2678 asyncs [asynccnt - 1] = w;
2679}
2680
2681void
2682ev_async_stop (EV_P_ ev_async *w)
2683{
2684 clear_pending (EV_A_ (W)w);
2685 if (expect_false (!ev_is_active (w)))
2686 return;
2687
2688 {
2689 int active = ev_active (w);
2690
2691 asyncs [active - 1] = asyncs [--asynccnt];
2692 ev_active (asyncs [active - 1]) = active;
2693 }
2694
2695 ev_stop (EV_A_ (W)w);
2696}
2697
2698void
2699ev_async_send (EV_P_ ev_async *w)
2700{
2701 w->sent = 1;
2702 evpipe_write (EV_A_ &gotasync);
1744} 2703}
1745#endif 2704#endif
1746 2705
1747/*****************************************************************************/ 2706/*****************************************************************************/
1748 2707
… …
1806 ev_timer_set (&once->to, timeout, 0.); 2765 ev_timer_set (&once->to, timeout, 0.);
1807 ev_timer_start (EV_A_ &once->to); 2766 ev_timer_start (EV_A_ &once->to);
1808 } 2767 }
1809} 2768}
1810 2769
2770#if EV_MULTIPLICITY
2771 #include "ev_wrap.h"
2772#endif
2773
1811#ifdef __cplusplus 2774#ifdef __cplusplus
1812} 2775}
1813#endif 2776#endif
1814 2777

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