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Comparing libev/ev.c (file contents):
Revision 1.141 by root, Mon Nov 26 20:33:58 2007 UTC vs.
Revision 1.286 by root, Wed Apr 15 19:37:15 2009 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) 2007,2008,2009 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"
41# endif 50# endif
42 51
52# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 0
57# endif
58# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1
60# endif
61# endif
62# endif
63
43# if HAVE_CLOCK_GETTIME 64# if HAVE_CLOCK_GETTIME
44# ifndef EV_USE_MONOTONIC 65# ifndef EV_USE_MONOTONIC
45# define EV_USE_MONOTONIC 1 66# define EV_USE_MONOTONIC 1
46# endif 67# endif
47# ifndef EV_USE_REALTIME 68# ifndef EV_USE_REALTIME
48# define EV_USE_REALTIME 1 69# define EV_USE_REALTIME 0
49# endif 70# endif
50# else 71# else
51# ifndef EV_USE_MONOTONIC 72# ifndef EV_USE_MONOTONIC
52# define EV_USE_MONOTONIC 0 73# define EV_USE_MONOTONIC 0
53# endif 74# endif
54# ifndef EV_USE_REALTIME 75# ifndef EV_USE_REALTIME
55# define EV_USE_REALTIME 0 76# define EV_USE_REALTIME 0
77# endif
78# endif
79
80# ifndef EV_USE_NANOSLEEP
81# if HAVE_NANOSLEEP
82# define EV_USE_NANOSLEEP 1
83# else
84# define EV_USE_NANOSLEEP 0
56# endif 85# endif
57# endif 86# endif
58 87
59# ifndef EV_USE_SELECT 88# ifndef EV_USE_SELECT
60# if HAVE_SELECT && HAVE_SYS_SELECT_H 89# if HAVE_SELECT && HAVE_SYS_SELECT_H
… …
94# else 123# else
95# define EV_USE_PORT 0 124# define EV_USE_PORT 0
96# endif 125# endif
97# endif 126# endif
98 127
128# ifndef EV_USE_INOTIFY
129# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
130# define EV_USE_INOTIFY 1
131# else
132# define EV_USE_INOTIFY 0
133# endif
134# endif
135
136# ifndef EV_USE_EVENTFD
137# if HAVE_EVENTFD
138# define EV_USE_EVENTFD 1
139# else
140# define EV_USE_EVENTFD 0
141# endif
142# endif
143
99#endif 144#endif
100 145
101#include <math.h> 146#include <math.h>
102#include <stdlib.h> 147#include <stdlib.h>
103#include <fcntl.h> 148#include <fcntl.h>
… …
109#include <errno.h> 154#include <errno.h>
110#include <sys/types.h> 155#include <sys/types.h>
111#include <time.h> 156#include <time.h>
112 157
113#include <signal.h> 158#include <signal.h>
159
160#ifdef EV_H
161# include EV_H
162#else
163# include "ev.h"
164#endif
114 165
115#ifndef _WIN32 166#ifndef _WIN32
116# include <sys/time.h> 167# include <sys/time.h>
117# include <sys/wait.h> 168# include <sys/wait.h>
118# include <unistd.h> 169# include <unistd.h>
119#else 170#else
171# include <io.h>
120# define WIN32_LEAN_AND_MEAN 172# define WIN32_LEAN_AND_MEAN
121# include <windows.h> 173# include <windows.h>
122# ifndef EV_SELECT_IS_WINSOCKET 174# ifndef EV_SELECT_IS_WINSOCKET
123# define EV_SELECT_IS_WINSOCKET 1 175# define EV_SELECT_IS_WINSOCKET 1
124# endif 176# endif
125#endif 177#endif
126 178
127/**/ 179/* this block tries to deduce configuration from header-defined symbols and defaults */
180
181#ifndef EV_USE_CLOCK_SYSCALL
182# if __linux && __GLIBC__ >= 2
183# define EV_USE_CLOCK_SYSCALL 1
184# else
185# define EV_USE_CLOCK_SYSCALL 0
186# endif
187#endif
128 188
129#ifndef EV_USE_MONOTONIC 189#ifndef EV_USE_MONOTONIC
190# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
191# define EV_USE_MONOTONIC 1
192# else
130# define EV_USE_MONOTONIC 0 193# define EV_USE_MONOTONIC 0
194# endif
131#endif 195#endif
132 196
133#ifndef EV_USE_REALTIME 197#ifndef EV_USE_REALTIME
134# define EV_USE_REALTIME 0 198# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
199#endif
200
201#ifndef EV_USE_NANOSLEEP
202# if _POSIX_C_SOURCE >= 199309L
203# define EV_USE_NANOSLEEP 1
204# else
205# define EV_USE_NANOSLEEP 0
206# endif
135#endif 207#endif
136 208
137#ifndef EV_USE_SELECT 209#ifndef EV_USE_SELECT
138# define EV_USE_SELECT 1 210# define EV_USE_SELECT 1
139#endif 211#endif
… …
145# define EV_USE_POLL 1 217# define EV_USE_POLL 1
146# endif 218# endif
147#endif 219#endif
148 220
149#ifndef EV_USE_EPOLL 221#ifndef EV_USE_EPOLL
222# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
223# define EV_USE_EPOLL 1
224# else
150# define EV_USE_EPOLL 0 225# define EV_USE_EPOLL 0
226# endif
151#endif 227#endif
152 228
153#ifndef EV_USE_KQUEUE 229#ifndef EV_USE_KQUEUE
154# define EV_USE_KQUEUE 0 230# define EV_USE_KQUEUE 0
155#endif 231#endif
156 232
157#ifndef EV_USE_PORT 233#ifndef EV_USE_PORT
158# define EV_USE_PORT 0 234# define EV_USE_PORT 0
159#endif 235#endif
160 236
161/**/ 237#ifndef EV_USE_INOTIFY
238# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
239# define EV_USE_INOTIFY 1
240# else
241# define EV_USE_INOTIFY 0
242# endif
243#endif
244
245#ifndef EV_PID_HASHSIZE
246# if EV_MINIMAL
247# define EV_PID_HASHSIZE 1
248# else
249# define EV_PID_HASHSIZE 16
250# endif
251#endif
252
253#ifndef EV_INOTIFY_HASHSIZE
254# if EV_MINIMAL
255# define EV_INOTIFY_HASHSIZE 1
256# else
257# define EV_INOTIFY_HASHSIZE 16
258# endif
259#endif
260
261#ifndef EV_USE_EVENTFD
262# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
263# define EV_USE_EVENTFD 1
264# else
265# define EV_USE_EVENTFD 0
266# endif
267#endif
268
269#if 0 /* debugging */
270# define EV_VERIFY 3
271# define EV_USE_4HEAP 1
272# define EV_HEAP_CACHE_AT 1
273#endif
274
275#ifndef EV_VERIFY
276# define EV_VERIFY !EV_MINIMAL
277#endif
278
279#ifndef EV_USE_4HEAP
280# define EV_USE_4HEAP !EV_MINIMAL
281#endif
282
283#ifndef EV_HEAP_CACHE_AT
284# define EV_HEAP_CACHE_AT !EV_MINIMAL
285#endif
286
287/* this block fixes any misconfiguration where we know we run into trouble otherwise */
162 288
163#ifndef CLOCK_MONOTONIC 289#ifndef CLOCK_MONOTONIC
164# undef EV_USE_MONOTONIC 290# undef EV_USE_MONOTONIC
165# define EV_USE_MONOTONIC 0 291# define EV_USE_MONOTONIC 0
166#endif 292#endif
… …
168#ifndef CLOCK_REALTIME 294#ifndef CLOCK_REALTIME
169# undef EV_USE_REALTIME 295# undef EV_USE_REALTIME
170# define EV_USE_REALTIME 0 296# define EV_USE_REALTIME 0
171#endif 297#endif
172 298
299#if !EV_STAT_ENABLE
300# undef EV_USE_INOTIFY
301# define EV_USE_INOTIFY 0
302#endif
303
304#if !EV_USE_NANOSLEEP
305# ifndef _WIN32
306# include <sys/select.h>
307# endif
308#endif
309
310#if EV_USE_INOTIFY
311# include <sys/utsname.h>
312# include <sys/statfs.h>
313# include <sys/inotify.h>
314/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
315# ifndef IN_DONT_FOLLOW
316# undef EV_USE_INOTIFY
317# define EV_USE_INOTIFY 0
318# endif
319#endif
320
173#if EV_SELECT_IS_WINSOCKET 321#if EV_SELECT_IS_WINSOCKET
174# include <winsock.h> 322# include <winsock.h>
175#endif 323#endif
176 324
325/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
326/* which makes programs even slower. might work on other unices, too. */
327#if EV_USE_CLOCK_SYSCALL
328# include <syscall.h>
329# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
330# undef EV_USE_MONOTONIC
331# define EV_USE_MONOTONIC 1
332#endif
333
334#if EV_USE_EVENTFD
335/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
336# include <stdint.h>
337# ifdef __cplusplus
338extern "C" {
339# endif
340int eventfd (unsigned int initval, int flags);
341# ifdef __cplusplus
342}
343# endif
344#endif
345
177/**/ 346/**/
347
348#if EV_VERIFY >= 3
349# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
350#else
351# define EV_FREQUENT_CHECK do { } while (0)
352#endif
353
354/*
355 * This is used to avoid floating point rounding problems.
356 * It is added to ev_rt_now when scheduling periodics
357 * to ensure progress, time-wise, even when rounding
358 * errors are against us.
359 * This value is good at least till the year 4000.
360 * Better solutions welcome.
361 */
362#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
178 363
179#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 364#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) */ 365#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 */ 366/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
183 367
184#ifdef EV_H
185# include EV_H
186#else
187# include "ev.h"
188#endif
189
190#if __GNUC__ >= 3 368#if __GNUC__ >= 4
191# define expect(expr,value) __builtin_expect ((expr),(value)) 369# define expect(expr,value) __builtin_expect ((expr),(value))
192# define inline_size static inline /* inline for codesize */
193# if EV_MINIMAL
194# define noinline __attribute__ ((noinline)) 370# define noinline __attribute__ ((noinline))
195# define inline_speed static noinline
196# else
197# define noinline
198# define inline_speed static inline
199# endif
200#else 371#else
201# define expect(expr,value) (expr) 372# define expect(expr,value) (expr)
202# define inline_speed static
203# define inline_minimal static
204# define noinline 373# define noinline
374# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
375# define inline
376# endif
205#endif 377#endif
206 378
207#define expect_false(expr) expect ((expr) != 0, 0) 379#define expect_false(expr) expect ((expr) != 0, 0)
208#define expect_true(expr) expect ((expr) != 0, 1) 380#define expect_true(expr) expect ((expr) != 0, 1)
381#define inline_size static inline
382
383#if EV_MINIMAL
384# define inline_speed static noinline
385#else
386# define inline_speed static inline
387#endif
209 388
210#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 389#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
211#define ABSPRI(w) ((w)->priority - EV_MINPRI) 390#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
212 391
213#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ 392#define EMPTY /* required for microsofts broken pseudo-c compiler */
214#define EMPTY2(a,b) /* used to suppress some warnings */ 393#define EMPTY2(a,b) /* used to suppress some warnings */
215 394
216typedef ev_watcher *W; 395typedef ev_watcher *W;
217typedef ev_watcher_list *WL; 396typedef ev_watcher_list *WL;
218typedef ev_watcher_time *WT; 397typedef ev_watcher_time *WT;
219 398
399#define ev_active(w) ((W)(w))->active
400#define ev_at(w) ((WT)(w))->at
401
402#if EV_USE_REALTIME
403/* sig_atomic_t is used to avoid per-thread variables or locking but still */
404/* giving it a reasonably high chance of working on typical architetcures */
405static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
406#endif
407
408#if EV_USE_MONOTONIC
220static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 409static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
410#endif
221 411
222#ifdef _WIN32 412#ifdef _WIN32
223# include "ev_win32.c" 413# include "ev_win32.c"
224#endif 414#endif
225 415
… …
232{ 422{
233 syserr_cb = cb; 423 syserr_cb = cb;
234} 424}
235 425
236static void noinline 426static void noinline
237syserr (const char *msg) 427ev_syserr (const char *msg)
238{ 428{
239 if (!msg) 429 if (!msg)
240 msg = "(libev) system error"; 430 msg = "(libev) system error";
241 431
242 if (syserr_cb) 432 if (syserr_cb)
… …
246 perror (msg); 436 perror (msg);
247 abort (); 437 abort ();
248 } 438 }
249} 439}
250 440
441static void *
442ev_realloc_emul (void *ptr, long size)
443{
444 /* some systems, notably openbsd and darwin, fail to properly
445 * implement realloc (x, 0) (as required by both ansi c-98 and
446 * the single unix specification, so work around them here.
447 */
448
449 if (size)
450 return realloc (ptr, size);
451
452 free (ptr);
453 return 0;
454}
455
251static void *(*alloc)(void *ptr, long size); 456static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
252 457
253void 458void
254ev_set_allocator (void *(*cb)(void *ptr, long size)) 459ev_set_allocator (void *(*cb)(void *ptr, long size))
255{ 460{
256 alloc = cb; 461 alloc = cb;
257} 462}
258 463
259static void * 464inline_speed void *
260ev_realloc (void *ptr, long size) 465ev_realloc (void *ptr, long size)
261{ 466{
262 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 467 ptr = alloc (ptr, size);
263 468
264 if (!ptr && size) 469 if (!ptr && size)
265 { 470 {
266 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 471 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
267 abort (); 472 abort ();
… …
278typedef struct 483typedef struct
279{ 484{
280 WL head; 485 WL head;
281 unsigned char events; 486 unsigned char events;
282 unsigned char reify; 487 unsigned char reify;
488 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
489 unsigned char unused;
490#if EV_USE_EPOLL
491 unsigned int egen; /* generation counter to counter epoll bugs */
492#endif
283#if EV_SELECT_IS_WINSOCKET 493#if EV_SELECT_IS_WINSOCKET
284 SOCKET handle; 494 SOCKET handle;
285#endif 495#endif
286} ANFD; 496} ANFD;
287 497
288typedef struct 498typedef struct
289{ 499{
290 W w; 500 W w;
291 int events; 501 int events;
292} ANPENDING; 502} ANPENDING;
503
504#if EV_USE_INOTIFY
505/* hash table entry per inotify-id */
506typedef struct
507{
508 WL head;
509} ANFS;
510#endif
511
512/* Heap Entry */
513#if EV_HEAP_CACHE_AT
514 typedef struct {
515 ev_tstamp at;
516 WT w;
517 } ANHE;
518
519 #define ANHE_w(he) (he).w /* access watcher, read-write */
520 #define ANHE_at(he) (he).at /* access cached at, read-only */
521 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
522#else
523 typedef WT ANHE;
524
525 #define ANHE_w(he) (he)
526 #define ANHE_at(he) (he)->at
527 #define ANHE_at_cache(he)
528#endif
293 529
294#if EV_MULTIPLICITY 530#if EV_MULTIPLICITY
295 531
296 struct ev_loop 532 struct ev_loop
297 { 533 {
… …
321 557
322ev_tstamp 558ev_tstamp
323ev_time (void) 559ev_time (void)
324{ 560{
325#if EV_USE_REALTIME 561#if EV_USE_REALTIME
562 if (expect_true (have_realtime))
563 {
326 struct timespec ts; 564 struct timespec ts;
327 clock_gettime (CLOCK_REALTIME, &ts); 565 clock_gettime (CLOCK_REALTIME, &ts);
328 return ts.tv_sec + ts.tv_nsec * 1e-9; 566 return ts.tv_sec + ts.tv_nsec * 1e-9;
329#else 567 }
568#endif
569
330 struct timeval tv; 570 struct timeval tv;
331 gettimeofday (&tv, 0); 571 gettimeofday (&tv, 0);
332 return tv.tv_sec + tv.tv_usec * 1e-6; 572 return tv.tv_sec + tv.tv_usec * 1e-6;
333#endif
334} 573}
335 574
336ev_tstamp inline_size 575inline_size ev_tstamp
337get_clock (void) 576get_clock (void)
338{ 577{
339#if EV_USE_MONOTONIC 578#if EV_USE_MONOTONIC
340 if (expect_true (have_monotonic)) 579 if (expect_true (have_monotonic))
341 { 580 {
… …
354{ 593{
355 return ev_rt_now; 594 return ev_rt_now;
356} 595}
357#endif 596#endif
358 597
359#define array_roundsize(type,n) (((n) | 4) & ~3) 598void
599ev_sleep (ev_tstamp delay)
600{
601 if (delay > 0.)
602 {
603#if EV_USE_NANOSLEEP
604 struct timespec ts;
605
606 ts.tv_sec = (time_t)delay;
607 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
608
609 nanosleep (&ts, 0);
610#elif defined(_WIN32)
611 Sleep ((unsigned long)(delay * 1e3));
612#else
613 struct timeval tv;
614
615 tv.tv_sec = (time_t)delay;
616 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
617
618 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
619 /* somehting nto guaranteed by newer posix versions, but guaranteed */
620 /* by older ones */
621 select (0, 0, 0, 0, &tv);
622#endif
623 }
624}
625
626/*****************************************************************************/
627
628#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
629
630inline_size int
631array_nextsize (int elem, int cur, int cnt)
632{
633 int ncur = cur + 1;
634
635 do
636 ncur <<= 1;
637 while (cnt > ncur);
638
639 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
640 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
641 {
642 ncur *= elem;
643 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
644 ncur = ncur - sizeof (void *) * 4;
645 ncur /= elem;
646 }
647
648 return ncur;
649}
650
651static noinline void *
652array_realloc (int elem, void *base, int *cur, int cnt)
653{
654 *cur = array_nextsize (elem, *cur, cnt);
655 return ev_realloc (base, elem * *cur);
656}
657
658#define array_init_zero(base,count) \
659 memset ((void *)(base), 0, sizeof (*(base)) * (count))
360 660
361#define array_needsize(type,base,cur,cnt,init) \ 661#define array_needsize(type,base,cur,cnt,init) \
362 if (expect_false ((cnt) > cur)) \ 662 if (expect_false ((cnt) > (cur))) \
363 { \ 663 { \
364 int newcnt = cur; \ 664 int ocur_ = (cur); \
365 do \ 665 (base) = (type *)array_realloc \
366 { \ 666 (sizeof (type), (base), &(cur), (cnt)); \
367 newcnt = array_roundsize (type, newcnt << 1); \ 667 init ((base) + (ocur_), (cur) - ocur_); \
368 } \
369 while ((cnt) > newcnt); \
370 \
371 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
372 init (base + cur, newcnt - cur); \
373 cur = newcnt; \
374 } 668 }
375 669
670#if 0
376#define array_slim(type,stem) \ 671#define array_slim(type,stem) \
377 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 672 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
378 { \ 673 { \
379 stem ## max = array_roundsize (stem ## cnt >> 1); \ 674 stem ## max = array_roundsize (stem ## cnt >> 1); \
380 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 675 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
381 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 676 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
382 } 677 }
678#endif
383 679
384#define array_free(stem, idx) \ 680#define array_free(stem, idx) \
385 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 681 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
386 682
387/*****************************************************************************/ 683/*****************************************************************************/
388 684
389void noinline 685void noinline
390ev_feed_event (EV_P_ void *w, int revents) 686ev_feed_event (EV_P_ void *w, int revents)
391{ 687{
392 W w_ = (W)w; 688 W w_ = (W)w;
689 int pri = ABSPRI (w_);
393 690
394 if (expect_false (w_->pending)) 691 if (expect_false (w_->pending))
692 pendings [pri][w_->pending - 1].events |= revents;
693 else
395 { 694 {
695 w_->pending = ++pendingcnt [pri];
696 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
697 pendings [pri][w_->pending - 1].w = w_;
396 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 698 pendings [pri][w_->pending - 1].events = revents;
397 return;
398 } 699 }
399
400 w_->pending = ++pendingcnt [ABSPRI (w_)];
401 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
402 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
403 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
404} 700}
405 701
406void inline_size 702inline_speed void
703feed_reverse (EV_P_ W w)
704{
705 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
706 rfeeds [rfeedcnt++] = w;
707}
708
709inline_size void
710feed_reverse_done (EV_P_ int revents)
711{
712 do
713 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
714 while (rfeedcnt);
715}
716
717inline_speed void
407queue_events (EV_P_ W *events, int eventcnt, int type) 718queue_events (EV_P_ W *events, int eventcnt, int type)
408{ 719{
409 int i; 720 int i;
410 721
411 for (i = 0; i < eventcnt; ++i) 722 for (i = 0; i < eventcnt; ++i)
412 ev_feed_event (EV_A_ events [i], type); 723 ev_feed_event (EV_A_ events [i], type);
413} 724}
414 725
415/*****************************************************************************/ 726/*****************************************************************************/
416 727
417void inline_size 728inline_speed void
418anfds_init (ANFD *base, int count)
419{
420 while (count--)
421 {
422 base->head = 0;
423 base->events = EV_NONE;
424 base->reify = 0;
425
426 ++base;
427 }
428}
429
430void inline_speed
431fd_event (EV_P_ int fd, int revents) 729fd_event (EV_P_ int fd, int revents)
432{ 730{
433 ANFD *anfd = anfds + fd; 731 ANFD *anfd = anfds + fd;
434 ev_io *w; 732 ev_io *w;
435 733
… …
443} 741}
444 742
445void 743void
446ev_feed_fd_event (EV_P_ int fd, int revents) 744ev_feed_fd_event (EV_P_ int fd, int revents)
447{ 745{
746 if (fd >= 0 && fd < anfdmax)
448 fd_event (EV_A_ fd, revents); 747 fd_event (EV_A_ fd, revents);
449} 748}
450 749
451void inline_size 750inline_size void
452fd_reify (EV_P) 751fd_reify (EV_P)
453{ 752{
454 int i; 753 int i;
455 754
456 for (i = 0; i < fdchangecnt; ++i) 755 for (i = 0; i < fdchangecnt; ++i)
457 { 756 {
458 int fd = fdchanges [i]; 757 int fd = fdchanges [i];
459 ANFD *anfd = anfds + fd; 758 ANFD *anfd = anfds + fd;
460 ev_io *w; 759 ev_io *w;
461 760
462 int events = 0; 761 unsigned char events = 0;
463 762
464 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 763 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
465 events |= w->events; 764 events |= (unsigned char)w->events;
466 765
467#if EV_SELECT_IS_WINSOCKET 766#if EV_SELECT_IS_WINSOCKET
468 if (events) 767 if (events)
469 { 768 {
470 unsigned long argp; 769 unsigned long arg;
770 #ifdef EV_FD_TO_WIN32_HANDLE
771 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
772 #else
471 anfd->handle = _get_osfhandle (fd); 773 anfd->handle = _get_osfhandle (fd);
774 #endif
472 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 775 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
473 } 776 }
474#endif 777#endif
475 778
779 {
780 unsigned char o_events = anfd->events;
781 unsigned char o_reify = anfd->reify;
782
476 anfd->reify = 0; 783 anfd->reify = 0;
477
478 backend_modify (EV_A_ fd, anfd->events, events);
479 anfd->events = events; 784 anfd->events = events;
785
786 if (o_events != events || o_reify & EV__IOFDSET)
787 backend_modify (EV_A_ fd, o_events, events);
788 }
480 } 789 }
481 790
482 fdchangecnt = 0; 791 fdchangecnt = 0;
483} 792}
484 793
485void inline_size 794inline_size void
486fd_change (EV_P_ int fd) 795fd_change (EV_P_ int fd, int flags)
487{ 796{
488 if (expect_false (anfds [fd].reify)) 797 unsigned char reify = anfds [fd].reify;
489 return;
490
491 anfds [fd].reify = 1; 798 anfds [fd].reify |= flags;
492 799
800 if (expect_true (!reify))
801 {
493 ++fdchangecnt; 802 ++fdchangecnt;
494 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 803 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
495 fdchanges [fdchangecnt - 1] = fd; 804 fdchanges [fdchangecnt - 1] = fd;
805 }
496} 806}
497 807
498void inline_speed 808inline_speed void
499fd_kill (EV_P_ int fd) 809fd_kill (EV_P_ int fd)
500{ 810{
501 ev_io *w; 811 ev_io *w;
502 812
503 while ((w = (ev_io *)anfds [fd].head)) 813 while ((w = (ev_io *)anfds [fd].head))
… …
505 ev_io_stop (EV_A_ w); 815 ev_io_stop (EV_A_ w);
506 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 816 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
507 } 817 }
508} 818}
509 819
510int inline_size 820inline_size int
511fd_valid (int fd) 821fd_valid (int fd)
512{ 822{
513#ifdef _WIN32 823#ifdef _WIN32
514 return _get_osfhandle (fd) != -1; 824 return _get_osfhandle (fd) != -1;
515#else 825#else
… …
523{ 833{
524 int fd; 834 int fd;
525 835
526 for (fd = 0; fd < anfdmax; ++fd) 836 for (fd = 0; fd < anfdmax; ++fd)
527 if (anfds [fd].events) 837 if (anfds [fd].events)
528 if (!fd_valid (fd) == -1 && errno == EBADF) 838 if (!fd_valid (fd) && errno == EBADF)
529 fd_kill (EV_A_ fd); 839 fd_kill (EV_A_ fd);
530} 840}
531 841
532/* called on ENOMEM in select/poll to kill some fds and retry */ 842/* called on ENOMEM in select/poll to kill some fds and retry */
533static void noinline 843static void noinline
… …
547static void noinline 857static void noinline
548fd_rearm_all (EV_P) 858fd_rearm_all (EV_P)
549{ 859{
550 int fd; 860 int fd;
551 861
552 /* this should be highly optimised to not do anything but set a flag */
553 for (fd = 0; fd < anfdmax; ++fd) 862 for (fd = 0; fd < anfdmax; ++fd)
554 if (anfds [fd].events) 863 if (anfds [fd].events)
555 { 864 {
556 anfds [fd].events = 0; 865 anfds [fd].events = 0;
866 anfds [fd].emask = 0;
557 fd_change (EV_A_ fd); 867 fd_change (EV_A_ fd, EV__IOFDSET | 1);
558 } 868 }
559} 869}
560 870
561/*****************************************************************************/ 871/*****************************************************************************/
562 872
563void inline_speed 873/*
564upheap (WT *heap, int k) 874 * the heap functions want a real array index. array index 0 uis guaranteed to not
565{ 875 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
566 WT w = heap [k]; 876 * the branching factor of the d-tree.
877 */
567 878
568 while (k && heap [k >> 1]->at > w->at) 879/*
569 { 880 * at the moment we allow libev the luxury of two heaps,
570 heap [k] = heap [k >> 1]; 881 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
571 ((W)heap [k])->active = k + 1; 882 * which is more cache-efficient.
572 k >>= 1; 883 * the difference is about 5% with 50000+ watchers.
573 } 884 */
885#if EV_USE_4HEAP
574 886
575 heap [k] = w; 887#define DHEAP 4
576 ((W)heap [k])->active = k + 1; 888#define HEAP0 (DHEAP - 1) /* index of first element in heap */
889#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
890#define UPHEAP_DONE(p,k) ((p) == (k))
577 891
578} 892/* away from the root */
579 893inline_speed void
580void inline_speed
581downheap (WT *heap, int N, int k) 894downheap (ANHE *heap, int N, int k)
582{ 895{
583 WT w = heap [k]; 896 ANHE he = heap [k];
897 ANHE *E = heap + N + HEAP0;
584 898
585 while (k < (N >> 1)) 899 for (;;)
586 { 900 {
587 int j = k << 1; 901 ev_tstamp minat;
902 ANHE *minpos;
903 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
588 904
589 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 905 /* find minimum child */
906 if (expect_true (pos + DHEAP - 1 < E))
590 ++j; 907 {
591 908 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
592 if (w->at <= heap [j]->at) 909 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
910 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
911 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
912 }
913 else if (pos < E)
914 {
915 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
916 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
917 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
918 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
919 }
920 else
593 break; 921 break;
594 922
923 if (ANHE_at (he) <= minat)
924 break;
925
926 heap [k] = *minpos;
927 ev_active (ANHE_w (*minpos)) = k;
928
929 k = minpos - heap;
930 }
931
932 heap [k] = he;
933 ev_active (ANHE_w (he)) = k;
934}
935
936#else /* 4HEAP */
937
938#define HEAP0 1
939#define HPARENT(k) ((k) >> 1)
940#define UPHEAP_DONE(p,k) (!(p))
941
942/* away from the root */
943inline_speed void
944downheap (ANHE *heap, int N, int k)
945{
946 ANHE he = heap [k];
947
948 for (;;)
949 {
950 int c = k << 1;
951
952 if (c > N + HEAP0 - 1)
953 break;
954
955 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
956 ? 1 : 0;
957
958 if (ANHE_at (he) <= ANHE_at (heap [c]))
959 break;
960
595 heap [k] = heap [j]; 961 heap [k] = heap [c];
596 ((W)heap [k])->active = k + 1; 962 ev_active (ANHE_w (heap [k])) = k;
963
597 k = j; 964 k = c;
598 } 965 }
599 966
600 heap [k] = w; 967 heap [k] = he;
601 ((W)heap [k])->active = k + 1; 968 ev_active (ANHE_w (he)) = k;
602} 969}
970#endif
603 971
604void inline_size 972/* towards the root */
973inline_speed void
974upheap (ANHE *heap, int k)
975{
976 ANHE he = heap [k];
977
978 for (;;)
979 {
980 int p = HPARENT (k);
981
982 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
983 break;
984
985 heap [k] = heap [p];
986 ev_active (ANHE_w (heap [k])) = k;
987 k = p;
988 }
989
990 heap [k] = he;
991 ev_active (ANHE_w (he)) = k;
992}
993
994inline_size void
605adjustheap (WT *heap, int N, int k) 995adjustheap (ANHE *heap, int N, int k)
606{ 996{
997 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
607 upheap (heap, k); 998 upheap (heap, k);
999 else
608 downheap (heap, N, k); 1000 downheap (heap, N, k);
1001}
1002
1003/* rebuild the heap: this function is used only once and executed rarely */
1004inline_size void
1005reheap (ANHE *heap, int N)
1006{
1007 int i;
1008
1009 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1010 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1011 for (i = 0; i < N; ++i)
1012 upheap (heap, i + HEAP0);
609} 1013}
610 1014
611/*****************************************************************************/ 1015/*****************************************************************************/
612 1016
613typedef struct 1017typedef struct
614{ 1018{
615 WL head; 1019 WL head;
616 sig_atomic_t volatile gotsig; 1020 EV_ATOMIC_T gotsig;
617} ANSIG; 1021} ANSIG;
618 1022
619static ANSIG *signals; 1023static ANSIG *signals;
620static int signalmax; 1024static int signalmax;
621 1025
622static int sigpipe [2]; 1026static EV_ATOMIC_T gotsig;
623static sig_atomic_t volatile gotsig;
624static ev_io sigev;
625 1027
626void inline_size 1028/*****************************************************************************/
627signals_init (ANSIG *base, int count)
628{
629 while (count--)
630 {
631 base->head = 0;
632 base->gotsig = 0;
633 1029
634 ++base; 1030inline_speed void
635 }
636}
637
638static void
639sighandler (int signum)
640{
641#if _WIN32
642 signal (signum, sighandler);
643#endif
644
645 signals [signum - 1].gotsig = 1;
646
647 if (!gotsig)
648 {
649 int old_errno = errno;
650 gotsig = 1;
651 write (sigpipe [1], &signum, 1);
652 errno = old_errno;
653 }
654}
655
656void noinline
657ev_feed_signal_event (EV_P_ int signum)
658{
659 WL w;
660
661#if EV_MULTIPLICITY
662 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
663#endif
664
665 --signum;
666
667 if (signum < 0 || signum >= signalmax)
668 return;
669
670 signals [signum].gotsig = 0;
671
672 for (w = signals [signum].head; w; w = w->next)
673 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
674}
675
676static void
677sigcb (EV_P_ ev_io *iow, int revents)
678{
679 int signum;
680
681 read (sigpipe [0], &revents, 1);
682 gotsig = 0;
683
684 for (signum = signalmax; signum--; )
685 if (signals [signum].gotsig)
686 ev_feed_signal_event (EV_A_ signum + 1);
687}
688
689void inline_size
690fd_intern (int fd) 1031fd_intern (int fd)
691{ 1032{
692#ifdef _WIN32 1033#ifdef _WIN32
693 int arg = 1; 1034 unsigned long arg = 1;
694 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1035 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
695#else 1036#else
696 fcntl (fd, F_SETFD, FD_CLOEXEC); 1037 fcntl (fd, F_SETFD, FD_CLOEXEC);
697 fcntl (fd, F_SETFL, O_NONBLOCK); 1038 fcntl (fd, F_SETFL, O_NONBLOCK);
698#endif 1039#endif
699} 1040}
700 1041
701static void noinline 1042static void noinline
702siginit (EV_P) 1043evpipe_init (EV_P)
703{ 1044{
1045 if (!ev_is_active (&pipeev))
1046 {
1047#if EV_USE_EVENTFD
1048 if ((evfd = eventfd (0, 0)) >= 0)
1049 {
1050 evpipe [0] = -1;
1051 fd_intern (evfd);
1052 ev_io_set (&pipeev, evfd, EV_READ);
1053 }
1054 else
1055#endif
1056 {
1057 while (pipe (evpipe))
1058 ev_syserr ("(libev) error creating signal/async pipe");
1059
704 fd_intern (sigpipe [0]); 1060 fd_intern (evpipe [0]);
705 fd_intern (sigpipe [1]); 1061 fd_intern (evpipe [1]);
1062 ev_io_set (&pipeev, evpipe [0], EV_READ);
1063 }
706 1064
707 ev_io_set (&sigev, sigpipe [0], EV_READ);
708 ev_io_start (EV_A_ &sigev); 1065 ev_io_start (EV_A_ &pipeev);
709 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1066 ev_unref (EV_A); /* watcher should not keep loop alive */
1067 }
1068}
1069
1070inline_size void
1071evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1072{
1073 if (!*flag)
1074 {
1075 int old_errno = errno; /* save errno because write might clobber it */
1076
1077 *flag = 1;
1078
1079#if EV_USE_EVENTFD
1080 if (evfd >= 0)
1081 {
1082 uint64_t counter = 1;
1083 write (evfd, &counter, sizeof (uint64_t));
1084 }
1085 else
1086#endif
1087 write (evpipe [1], &old_errno, 1);
1088
1089 errno = old_errno;
1090 }
1091}
1092
1093static void
1094pipecb (EV_P_ ev_io *iow, int revents)
1095{
1096#if EV_USE_EVENTFD
1097 if (evfd >= 0)
1098 {
1099 uint64_t counter;
1100 read (evfd, &counter, sizeof (uint64_t));
1101 }
1102 else
1103#endif
1104 {
1105 char dummy;
1106 read (evpipe [0], &dummy, 1);
1107 }
1108
1109 if (gotsig && ev_is_default_loop (EV_A))
1110 {
1111 int signum;
1112 gotsig = 0;
1113
1114 for (signum = signalmax; signum--; )
1115 if (signals [signum].gotsig)
1116 ev_feed_signal_event (EV_A_ signum + 1);
1117 }
1118
1119#if EV_ASYNC_ENABLE
1120 if (gotasync)
1121 {
1122 int i;
1123 gotasync = 0;
1124
1125 for (i = asynccnt; i--; )
1126 if (asyncs [i]->sent)
1127 {
1128 asyncs [i]->sent = 0;
1129 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1130 }
1131 }
1132#endif
710} 1133}
711 1134
712/*****************************************************************************/ 1135/*****************************************************************************/
713 1136
1137static void
1138ev_sighandler (int signum)
1139{
1140#if EV_MULTIPLICITY
1141 struct ev_loop *loop = &default_loop_struct;
1142#endif
1143
1144#if _WIN32
1145 signal (signum, ev_sighandler);
1146#endif
1147
1148 signals [signum - 1].gotsig = 1;
1149 evpipe_write (EV_A_ &gotsig);
1150}
1151
1152void noinline
1153ev_feed_signal_event (EV_P_ int signum)
1154{
1155 WL w;
1156
1157#if EV_MULTIPLICITY
1158 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1159#endif
1160
1161 --signum;
1162
1163 if (signum < 0 || signum >= signalmax)
1164 return;
1165
1166 signals [signum].gotsig = 0;
1167
1168 for (w = signals [signum].head; w; w = w->next)
1169 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1170}
1171
1172/*****************************************************************************/
1173
714static ev_child *childs [PID_HASHSIZE]; 1174static WL childs [EV_PID_HASHSIZE];
715 1175
716#ifndef _WIN32 1176#ifndef _WIN32
717 1177
718static ev_signal childev; 1178static ev_signal childev;
1179
1180#ifndef WIFCONTINUED
1181# define WIFCONTINUED(status) 0
1182#endif
1183
1184inline_speed void
1185child_reap (EV_P_ int chain, int pid, int status)
1186{
1187 ev_child *w;
1188 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1189
1190 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1191 {
1192 if ((w->pid == pid || !w->pid)
1193 && (!traced || (w->flags & 1)))
1194 {
1195 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1196 w->rpid = pid;
1197 w->rstatus = status;
1198 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1199 }
1200 }
1201}
719 1202
720#ifndef WCONTINUED 1203#ifndef WCONTINUED
721# define WCONTINUED 0 1204# define WCONTINUED 0
722#endif 1205#endif
723 1206
724void inline_speed
725child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
726{
727 ev_child *w;
728
729 for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
730 if (w->pid == pid || !w->pid)
731 {
732 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
733 w->rpid = pid;
734 w->rstatus = status;
735 ev_feed_event (EV_A_ (W)w, EV_CHILD);
736 }
737}
738
739static void 1207static void
740childcb (EV_P_ ev_signal *sw, int revents) 1208childcb (EV_P_ ev_signal *sw, int revents)
741{ 1209{
742 int pid, status; 1210 int pid, status;
743 1211
1212 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
744 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1213 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
745 { 1214 if (!WCONTINUED
1215 || errno != EINVAL
1216 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1217 return;
1218
746 /* make sure we are called again until all childs have been reaped */ 1219 /* make sure we are called again until all children have been reaped */
747 /* we need to do it this way so that the callback gets called before we continue */ 1220 /* we need to do it this way so that the callback gets called before we continue */
748 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1221 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
749 1222
750 child_reap (EV_A_ sw, pid, pid, status); 1223 child_reap (EV_A_ pid, pid, status);
1224 if (EV_PID_HASHSIZE > 1)
751 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1225 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
752 }
753} 1226}
754 1227
755#endif 1228#endif
756 1229
757/*****************************************************************************/ 1230/*****************************************************************************/
… …
819 /* kqueue is borked on everything but netbsd apparently */ 1292 /* kqueue is borked on everything but netbsd apparently */
820 /* it usually doesn't work correctly on anything but sockets and pipes */ 1293 /* it usually doesn't work correctly on anything but sockets and pipes */
821 flags &= ~EVBACKEND_KQUEUE; 1294 flags &= ~EVBACKEND_KQUEUE;
822#endif 1295#endif
823#ifdef __APPLE__ 1296#ifdef __APPLE__
824 // flags &= ~EVBACKEND_KQUEUE; for documentation 1297 /* only select works correctly on that "unix-certified" platform */
825 flags &= ~EVBACKEND_POLL; 1298 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1299 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
826#endif 1300#endif
827 1301
828 return flags; 1302 return flags;
829} 1303}
830 1304
831unsigned int 1305unsigned int
832ev_embeddable_backends (void) 1306ev_embeddable_backends (void)
833{ 1307{
834 return EVBACKEND_EPOLL 1308 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
835 | EVBACKEND_KQUEUE 1309
836 | EVBACKEND_PORT; 1310 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1311 /* please fix it and tell me how to detect the fix */
1312 flags &= ~EVBACKEND_EPOLL;
1313
1314 return flags;
837} 1315}
838 1316
839unsigned int 1317unsigned int
840ev_backend (EV_P) 1318ev_backend (EV_P)
841{ 1319{
842 return backend; 1320 return backend;
843} 1321}
844 1322
845static void 1323unsigned int
1324ev_loop_count (EV_P)
1325{
1326 return loop_count;
1327}
1328
1329void
1330ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1331{
1332 io_blocktime = interval;
1333}
1334
1335void
1336ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1337{
1338 timeout_blocktime = interval;
1339}
1340
1341static void noinline
846loop_init (EV_P_ unsigned int flags) 1342loop_init (EV_P_ unsigned int flags)
847{ 1343{
848 if (!backend) 1344 if (!backend)
849 { 1345 {
1346#if EV_USE_REALTIME
1347 if (!have_realtime)
1348 {
1349 struct timespec ts;
1350
1351 if (!clock_gettime (CLOCK_REALTIME, &ts))
1352 have_realtime = 1;
1353 }
1354#endif
1355
850#if EV_USE_MONOTONIC 1356#if EV_USE_MONOTONIC
1357 if (!have_monotonic)
851 { 1358 {
852 struct timespec ts; 1359 struct timespec ts;
1360
853 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1361 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
854 have_monotonic = 1; 1362 have_monotonic = 1;
855 } 1363 }
856#endif 1364#endif
857 1365
858 ev_rt_now = ev_time (); 1366 ev_rt_now = ev_time ();
859 mn_now = get_clock (); 1367 mn_now = get_clock ();
860 now_floor = mn_now; 1368 now_floor = mn_now;
861 rtmn_diff = ev_rt_now - mn_now; 1369 rtmn_diff = ev_rt_now - mn_now;
1370
1371 io_blocktime = 0.;
1372 timeout_blocktime = 0.;
1373 backend = 0;
1374 backend_fd = -1;
1375 gotasync = 0;
1376#if EV_USE_INOTIFY
1377 fs_fd = -2;
1378#endif
1379
1380 /* pid check not overridable via env */
1381#ifndef _WIN32
1382 if (flags & EVFLAG_FORKCHECK)
1383 curpid = getpid ();
1384#endif
862 1385
863 if (!(flags & EVFLAG_NOENV) 1386 if (!(flags & EVFLAG_NOENV)
864 && !enable_secure () 1387 && !enable_secure ()
865 && getenv ("LIBEV_FLAGS")) 1388 && getenv ("LIBEV_FLAGS"))
866 flags = atoi (getenv ("LIBEV_FLAGS")); 1389 flags = atoi (getenv ("LIBEV_FLAGS"));
867 1390
868 if (!(flags & 0x0000ffffUL)) 1391 if (!(flags & 0x0000ffffU))
869 flags |= ev_recommended_backends (); 1392 flags |= ev_recommended_backends ();
870 1393
871 backend = 0;
872#if EV_USE_PORT 1394#if EV_USE_PORT
873 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1395 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
874#endif 1396#endif
875#if EV_USE_KQUEUE 1397#if EV_USE_KQUEUE
876 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1398 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
883#endif 1405#endif
884#if EV_USE_SELECT 1406#if EV_USE_SELECT
885 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1407 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
886#endif 1408#endif
887 1409
888 ev_init (&sigev, sigcb); 1410 ev_init (&pipeev, pipecb);
889 ev_set_priority (&sigev, EV_MAXPRI); 1411 ev_set_priority (&pipeev, EV_MAXPRI);
890 } 1412 }
891} 1413}
892 1414
893static void 1415static void noinline
894loop_destroy (EV_P) 1416loop_destroy (EV_P)
895{ 1417{
896 int i; 1418 int i;
1419
1420 if (ev_is_active (&pipeev))
1421 {
1422 ev_ref (EV_A); /* signal watcher */
1423 ev_io_stop (EV_A_ &pipeev);
1424
1425#if EV_USE_EVENTFD
1426 if (evfd >= 0)
1427 close (evfd);
1428#endif
1429
1430 if (evpipe [0] >= 0)
1431 {
1432 close (evpipe [0]);
1433 close (evpipe [1]);
1434 }
1435 }
1436
1437#if EV_USE_INOTIFY
1438 if (fs_fd >= 0)
1439 close (fs_fd);
1440#endif
1441
1442 if (backend_fd >= 0)
1443 close (backend_fd);
897 1444
898#if EV_USE_PORT 1445#if EV_USE_PORT
899 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1446 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
900#endif 1447#endif
901#if EV_USE_KQUEUE 1448#if EV_USE_KQUEUE
… …
910#if EV_USE_SELECT 1457#if EV_USE_SELECT
911 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 1458 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
912#endif 1459#endif
913 1460
914 for (i = NUMPRI; i--; ) 1461 for (i = NUMPRI; i--; )
1462 {
915 array_free (pending, [i]); 1463 array_free (pending, [i]);
1464#if EV_IDLE_ENABLE
1465 array_free (idle, [i]);
1466#endif
1467 }
1468
1469 ev_free (anfds); anfdmax = 0;
916 1470
917 /* have to use the microsoft-never-gets-it-right macro */ 1471 /* have to use the microsoft-never-gets-it-right macro */
1472 array_free (rfeed, EMPTY);
918 array_free (fdchange, EMPTY0); 1473 array_free (fdchange, EMPTY);
919 array_free (timer, EMPTY0); 1474 array_free (timer, EMPTY);
920#if EV_PERIODIC_ENABLE 1475#if EV_PERIODIC_ENABLE
921 array_free (periodic, EMPTY0); 1476 array_free (periodic, EMPTY);
922#endif 1477#endif
1478#if EV_FORK_ENABLE
923 array_free (idle, EMPTY0); 1479 array_free (fork, EMPTY);
1480#endif
924 array_free (prepare, EMPTY0); 1481 array_free (prepare, EMPTY);
925 array_free (check, EMPTY0); 1482 array_free (check, EMPTY);
1483#if EV_ASYNC_ENABLE
1484 array_free (async, EMPTY);
1485#endif
926 1486
927 backend = 0; 1487 backend = 0;
928} 1488}
929 1489
930static void 1490#if EV_USE_INOTIFY
1491inline_size void infy_fork (EV_P);
1492#endif
1493
1494inline_size void
931loop_fork (EV_P) 1495loop_fork (EV_P)
932{ 1496{
933#if EV_USE_PORT 1497#if EV_USE_PORT
934 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 1498 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
935#endif 1499#endif
… …
937 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 1501 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
938#endif 1502#endif
939#if EV_USE_EPOLL 1503#if EV_USE_EPOLL
940 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 1504 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
941#endif 1505#endif
1506#if EV_USE_INOTIFY
1507 infy_fork (EV_A);
1508#endif
942 1509
943 if (ev_is_active (&sigev)) 1510 if (ev_is_active (&pipeev))
944 { 1511 {
945 /* default loop */ 1512 /* this "locks" the handlers against writing to the pipe */
1513 /* while we modify the fd vars */
1514 gotsig = 1;
1515#if EV_ASYNC_ENABLE
1516 gotasync = 1;
1517#endif
946 1518
947 ev_ref (EV_A); 1519 ev_ref (EV_A);
948 ev_io_stop (EV_A_ &sigev); 1520 ev_io_stop (EV_A_ &pipeev);
1521
1522#if EV_USE_EVENTFD
1523 if (evfd >= 0)
1524 close (evfd);
1525#endif
1526
1527 if (evpipe [0] >= 0)
1528 {
949 close (sigpipe [0]); 1529 close (evpipe [0]);
950 close (sigpipe [1]); 1530 close (evpipe [1]);
1531 }
951 1532
952 while (pipe (sigpipe))
953 syserr ("(libev) error creating pipe");
954
955 siginit (EV_A); 1533 evpipe_init (EV_A);
1534 /* now iterate over everything, in case we missed something */
1535 pipecb (EV_A_ &pipeev, EV_READ);
956 } 1536 }
957 1537
958 postfork = 0; 1538 postfork = 0;
959} 1539}
960 1540
961#if EV_MULTIPLICITY 1541#if EV_MULTIPLICITY
1542
962struct ev_loop * 1543struct ev_loop *
963ev_loop_new (unsigned int flags) 1544ev_loop_new (unsigned int flags)
964{ 1545{
965 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 1546 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
966 1547
… …
982} 1563}
983 1564
984void 1565void
985ev_loop_fork (EV_P) 1566ev_loop_fork (EV_P)
986{ 1567{
987 postfork = 1; 1568 postfork = 1; /* must be in line with ev_default_fork */
988} 1569}
989 1570
1571#if EV_VERIFY
1572static void noinline
1573verify_watcher (EV_P_ W w)
1574{
1575 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1576
1577 if (w->pending)
1578 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1579}
1580
1581static void noinline
1582verify_heap (EV_P_ ANHE *heap, int N)
1583{
1584 int i;
1585
1586 for (i = HEAP0; i < N + HEAP0; ++i)
1587 {
1588 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1589 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1590 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1591
1592 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1593 }
1594}
1595
1596static void noinline
1597array_verify (EV_P_ W *ws, int cnt)
1598{
1599 while (cnt--)
1600 {
1601 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1602 verify_watcher (EV_A_ ws [cnt]);
1603 }
1604}
1605#endif
1606
1607void
1608ev_loop_verify (EV_P)
1609{
1610#if EV_VERIFY
1611 int i;
1612 WL w;
1613
1614 assert (activecnt >= -1);
1615
1616 assert (fdchangemax >= fdchangecnt);
1617 for (i = 0; i < fdchangecnt; ++i)
1618 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1619
1620 assert (anfdmax >= 0);
1621 for (i = 0; i < anfdmax; ++i)
1622 for (w = anfds [i].head; w; w = w->next)
1623 {
1624 verify_watcher (EV_A_ (W)w);
1625 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1626 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1627 }
1628
1629 assert (timermax >= timercnt);
1630 verify_heap (EV_A_ timers, timercnt);
1631
1632#if EV_PERIODIC_ENABLE
1633 assert (periodicmax >= periodiccnt);
1634 verify_heap (EV_A_ periodics, periodiccnt);
1635#endif
1636
1637 for (i = NUMPRI; i--; )
1638 {
1639 assert (pendingmax [i] >= pendingcnt [i]);
1640#if EV_IDLE_ENABLE
1641 assert (idleall >= 0);
1642 assert (idlemax [i] >= idlecnt [i]);
1643 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1644#endif
1645 }
1646
1647#if EV_FORK_ENABLE
1648 assert (forkmax >= forkcnt);
1649 array_verify (EV_A_ (W *)forks, forkcnt);
1650#endif
1651
1652#if EV_ASYNC_ENABLE
1653 assert (asyncmax >= asynccnt);
1654 array_verify (EV_A_ (W *)asyncs, asynccnt);
1655#endif
1656
1657 assert (preparemax >= preparecnt);
1658 array_verify (EV_A_ (W *)prepares, preparecnt);
1659
1660 assert (checkmax >= checkcnt);
1661 array_verify (EV_A_ (W *)checks, checkcnt);
1662
1663# if 0
1664 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1665 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
990#endif 1666# endif
1667#endif
1668}
1669
1670#endif /* multiplicity */
991 1671
992#if EV_MULTIPLICITY 1672#if EV_MULTIPLICITY
993struct ev_loop * 1673struct ev_loop *
994ev_default_loop_init (unsigned int flags) 1674ev_default_loop_init (unsigned int flags)
995#else 1675#else
996int 1676int
997ev_default_loop (unsigned int flags) 1677ev_default_loop (unsigned int flags)
998#endif 1678#endif
999{ 1679{
1000 if (sigpipe [0] == sigpipe [1])
1001 if (pipe (sigpipe))
1002 return 0;
1003
1004 if (!ev_default_loop_ptr) 1680 if (!ev_default_loop_ptr)
1005 { 1681 {
1006#if EV_MULTIPLICITY 1682#if EV_MULTIPLICITY
1007 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1683 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1008#else 1684#else
… …
1011 1687
1012 loop_init (EV_A_ flags); 1688 loop_init (EV_A_ flags);
1013 1689
1014 if (ev_backend (EV_A)) 1690 if (ev_backend (EV_A))
1015 { 1691 {
1016 siginit (EV_A);
1017
1018#ifndef _WIN32 1692#ifndef _WIN32
1019 ev_signal_init (&childev, childcb, SIGCHLD); 1693 ev_signal_init (&childev, childcb, SIGCHLD);
1020 ev_set_priority (&childev, EV_MAXPRI); 1694 ev_set_priority (&childev, EV_MAXPRI);
1021 ev_signal_start (EV_A_ &childev); 1695 ev_signal_start (EV_A_ &childev);
1022 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1696 ev_unref (EV_A); /* child watcher should not keep loop alive */
… …
1034{ 1708{
1035#if EV_MULTIPLICITY 1709#if EV_MULTIPLICITY
1036 struct ev_loop *loop = ev_default_loop_ptr; 1710 struct ev_loop *loop = ev_default_loop_ptr;
1037#endif 1711#endif
1038 1712
1713 ev_default_loop_ptr = 0;
1714
1039#ifndef _WIN32 1715#ifndef _WIN32
1040 ev_ref (EV_A); /* child watcher */ 1716 ev_ref (EV_A); /* child watcher */
1041 ev_signal_stop (EV_A_ &childev); 1717 ev_signal_stop (EV_A_ &childev);
1042#endif 1718#endif
1043 1719
1044 ev_ref (EV_A); /* signal watcher */
1045 ev_io_stop (EV_A_ &sigev);
1046
1047 close (sigpipe [0]); sigpipe [0] = 0;
1048 close (sigpipe [1]); sigpipe [1] = 0;
1049
1050 loop_destroy (EV_A); 1720 loop_destroy (EV_A);
1051} 1721}
1052 1722
1053void 1723void
1054ev_default_fork (void) 1724ev_default_fork (void)
1055{ 1725{
1056#if EV_MULTIPLICITY 1726#if EV_MULTIPLICITY
1057 struct ev_loop *loop = ev_default_loop_ptr; 1727 struct ev_loop *loop = ev_default_loop_ptr;
1058#endif 1728#endif
1059 1729
1060 if (backend) 1730 postfork = 1; /* must be in line with ev_loop_fork */
1061 postfork = 1;
1062} 1731}
1063 1732
1064/*****************************************************************************/ 1733/*****************************************************************************/
1065 1734
1066int inline_size 1735void
1067any_pending (EV_P) 1736ev_invoke (EV_P_ void *w, int revents)
1068{ 1737{
1069 int pri; 1738 EV_CB_INVOKE ((W)w, revents);
1070
1071 for (pri = NUMPRI; pri--; )
1072 if (pendingcnt [pri])
1073 return 1;
1074
1075 return 0;
1076} 1739}
1077 1740
1078void inline_speed 1741inline_speed void
1079call_pending (EV_P) 1742call_pending (EV_P)
1080{ 1743{
1081 int pri; 1744 int pri;
1082 1745
1083 for (pri = NUMPRI; pri--; ) 1746 for (pri = NUMPRI; pri--; )
… …
1085 { 1748 {
1086 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1749 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1087 1750
1088 if (expect_true (p->w)) 1751 if (expect_true (p->w))
1089 { 1752 {
1090 assert (("non-pending watcher on pending list", p->w->pending)); 1753 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1091 1754
1092 p->w->pending = 0; 1755 p->w->pending = 0;
1093 EV_CB_INVOKE (p->w, p->events); 1756 EV_CB_INVOKE (p->w, p->events);
1757 EV_FREQUENT_CHECK;
1094 } 1758 }
1095 } 1759 }
1096} 1760}
1097 1761
1098void inline_size 1762#if EV_IDLE_ENABLE
1763inline_size void
1764idle_reify (EV_P)
1765{
1766 if (expect_false (idleall))
1767 {
1768 int pri;
1769
1770 for (pri = NUMPRI; pri--; )
1771 {
1772 if (pendingcnt [pri])
1773 break;
1774
1775 if (idlecnt [pri])
1776 {
1777 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
1778 break;
1779 }
1780 }
1781 }
1782}
1783#endif
1784
1785inline_size void
1099timers_reify (EV_P) 1786timers_reify (EV_P)
1100{ 1787{
1788 EV_FREQUENT_CHECK;
1789
1101 while (timercnt && ((WT)timers [0])->at <= mn_now) 1790 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1102 { 1791 {
1103 ev_timer *w = timers [0]; 1792 do
1104
1105 assert (("inactive timer on timer heap detected", ev_is_active (w)));
1106
1107 /* first reschedule or stop timer */
1108 if (w->repeat)
1109 { 1793 {
1794 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1795
1796 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
1797
1798 /* first reschedule or stop timer */
1799 if (w->repeat)
1800 {
1801 ev_at (w) += w->repeat;
1802 if (ev_at (w) < mn_now)
1803 ev_at (w) = mn_now;
1804
1110 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 1805 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1111 1806
1112 ((WT)w)->at += w->repeat; 1807 ANHE_at_cache (timers [HEAP0]);
1113 if (((WT)w)->at < mn_now)
1114 ((WT)w)->at = mn_now;
1115
1116 downheap ((WT *)timers, timercnt, 0); 1808 downheap (timers, timercnt, HEAP0);
1809 }
1810 else
1811 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1812
1813 EV_FREQUENT_CHECK;
1814 feed_reverse (EV_A_ (W)w);
1117 } 1815 }
1118 else 1816 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1119 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1120 1817
1121 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 1818 feed_reverse_done (EV_A_ EV_TIMEOUT);
1122 } 1819 }
1123} 1820}
1124 1821
1125#if EV_PERIODIC_ENABLE 1822#if EV_PERIODIC_ENABLE
1126void inline_size 1823inline_size void
1127periodics_reify (EV_P) 1824periodics_reify (EV_P)
1128{ 1825{
1826 EV_FREQUENT_CHECK;
1827
1129 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 1828 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1130 { 1829 {
1131 ev_periodic *w = periodics [0]; 1830 int feed_count = 0;
1132 1831
1133 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 1832 do
1134
1135 /* first reschedule or stop timer */
1136 if (w->reschedule_cb)
1137 { 1833 {
1834 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1835
1836 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1837
1838 /* first reschedule or stop timer */
1839 if (w->reschedule_cb)
1840 {
1138 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 1841 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1842
1139 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 1843 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1844
1845 ANHE_at_cache (periodics [HEAP0]);
1140 downheap ((WT *)periodics, periodiccnt, 0); 1846 downheap (periodics, periodiccnt, HEAP0);
1847 }
1848 else if (w->interval)
1849 {
1850 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1851 /* if next trigger time is not sufficiently in the future, put it there */
1852 /* this might happen because of floating point inexactness */
1853 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1854 {
1855 ev_at (w) += w->interval;
1856
1857 /* if interval is unreasonably low we might still have a time in the past */
1858 /* so correct this. this will make the periodic very inexact, but the user */
1859 /* has effectively asked to get triggered more often than possible */
1860 if (ev_at (w) < ev_rt_now)
1861 ev_at (w) = ev_rt_now;
1862 }
1863
1864 ANHE_at_cache (periodics [HEAP0]);
1865 downheap (periodics, periodiccnt, HEAP0);
1866 }
1867 else
1868 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1869
1870 EV_FREQUENT_CHECK;
1871 feed_reverse (EV_A_ (W)w);
1141 } 1872 }
1142 else if (w->interval) 1873 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1143 {
1144 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1145 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1146 downheap ((WT *)periodics, periodiccnt, 0);
1147 }
1148 else
1149 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1150 1874
1151 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 1875 feed_reverse_done (EV_A_ EV_PERIODIC);
1152 } 1876 }
1153} 1877}
1154 1878
1155static void noinline 1879static void noinline
1156periodics_reschedule (EV_P) 1880periodics_reschedule (EV_P)
1157{ 1881{
1158 int i; 1882 int i;
1159 1883
1160 /* adjust periodics after time jump */ 1884 /* adjust periodics after time jump */
1161 for (i = 0; i < periodiccnt; ++i) 1885 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1162 { 1886 {
1163 ev_periodic *w = periodics [i]; 1887 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1164 1888
1165 if (w->reschedule_cb) 1889 if (w->reschedule_cb)
1166 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 1890 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1167 else if (w->interval) 1891 else if (w->interval)
1168 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 1892 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1893
1894 ANHE_at_cache (periodics [i]);
1895 }
1896
1897 reheap (periodics, periodiccnt);
1898}
1899#endif
1900
1901static void noinline
1902timers_reschedule (EV_P_ ev_tstamp adjust)
1903{
1904 int i;
1905
1906 for (i = 0; i < timercnt; ++i)
1169 } 1907 {
1170 1908 ANHE *he = timers + i + HEAP0;
1171 /* now rebuild the heap */ 1909 ANHE_w (*he)->at += adjust;
1172 for (i = periodiccnt >> 1; i--; ) 1910 ANHE_at_cache (*he);
1173 downheap ((WT *)periodics, periodiccnt, i); 1911 }
1174} 1912}
1175#endif
1176 1913
1177int inline_size 1914inline_speed void
1178time_update_monotonic (EV_P) 1915time_update (EV_P_ ev_tstamp max_block)
1179{ 1916{
1917 int i;
1918
1919#if EV_USE_MONOTONIC
1920 if (expect_true (have_monotonic))
1921 {
1922 ev_tstamp odiff = rtmn_diff;
1923
1180 mn_now = get_clock (); 1924 mn_now = get_clock ();
1181 1925
1926 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1927 /* interpolate in the meantime */
1182 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 1928 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1183 { 1929 {
1184 ev_rt_now = rtmn_diff + mn_now; 1930 ev_rt_now = rtmn_diff + mn_now;
1185 return 0; 1931 return;
1186 } 1932 }
1187 else 1933
1188 {
1189 now_floor = mn_now; 1934 now_floor = mn_now;
1190 ev_rt_now = ev_time (); 1935 ev_rt_now = ev_time ();
1191 return 1;
1192 }
1193}
1194 1936
1195void inline_size 1937 /* loop a few times, before making important decisions.
1196time_update (EV_P) 1938 * on the choice of "4": one iteration isn't enough,
1197{ 1939 * in case we get preempted during the calls to
1198 int i; 1940 * ev_time and get_clock. a second call is almost guaranteed
1199 1941 * to succeed in that case, though. and looping a few more times
1200#if EV_USE_MONOTONIC 1942 * doesn't hurt either as we only do this on time-jumps or
1201 if (expect_true (have_monotonic)) 1943 * in the unlikely event of having been preempted here.
1202 { 1944 */
1203 if (time_update_monotonic (EV_A)) 1945 for (i = 4; --i; )
1204 { 1946 {
1205 ev_tstamp odiff = rtmn_diff;
1206
1207 /* loop a few times, before making important decisions.
1208 * on the choice of "4": one iteration isn't enough,
1209 * in case we get preempted during the calls to
1210 * ev_time and get_clock. a second call is almost guarenteed
1211 * to succeed in that case, though. and looping a few more times
1212 * doesn't hurt either as we only do this on time-jumps or
1213 * in the unlikely event of getting preempted here.
1214 */
1215 for (i = 4; --i; )
1216 {
1217 rtmn_diff = ev_rt_now - mn_now; 1947 rtmn_diff = ev_rt_now - mn_now;
1218 1948
1219 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1949 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1220 return; /* all is well */ 1950 return; /* all is well */
1221 1951
1222 ev_rt_now = ev_time (); 1952 ev_rt_now = ev_time ();
1223 mn_now = get_clock (); 1953 mn_now = get_clock ();
1224 now_floor = mn_now; 1954 now_floor = mn_now;
1225 } 1955 }
1226 1956
1957 /* no timer adjustment, as the monotonic clock doesn't jump */
1958 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1227# if EV_PERIODIC_ENABLE 1959# if EV_PERIODIC_ENABLE
1228 periodics_reschedule (EV_A); 1960 periodics_reschedule (EV_A);
1229# endif 1961# endif
1230 /* no timer adjustment, as the monotonic clock doesn't jump */
1231 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1232 }
1233 } 1962 }
1234 else 1963 else
1235#endif 1964#endif
1236 { 1965 {
1237 ev_rt_now = ev_time (); 1966 ev_rt_now = ev_time ();
1238 1967
1239 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 1968 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1240 { 1969 {
1970 /* adjust timers. this is easy, as the offset is the same for all of them */
1971 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1241#if EV_PERIODIC_ENABLE 1972#if EV_PERIODIC_ENABLE
1242 periodics_reschedule (EV_A); 1973 periodics_reschedule (EV_A);
1243#endif 1974#endif
1244
1245 /* adjust timers. this is easy, as the offset is the same for all */
1246 for (i = 0; i < timercnt; ++i)
1247 ((WT)timers [i])->at += ev_rt_now - mn_now;
1248 } 1975 }
1249 1976
1250 mn_now = ev_rt_now; 1977 mn_now = ev_rt_now;
1251 } 1978 }
1252} 1979}
1253 1980
1254void
1255ev_ref (EV_P)
1256{
1257 ++activecnt;
1258}
1259
1260void
1261ev_unref (EV_P)
1262{
1263 --activecnt;
1264}
1265
1266static int loop_done; 1981static int loop_done;
1267 1982
1268void 1983void
1269ev_loop (EV_P_ int flags) 1984ev_loop (EV_P_ int flags)
1270{ 1985{
1271 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 1986 loop_done = EVUNLOOP_CANCEL;
1272 ? EVUNLOOP_ONE
1273 : EVUNLOOP_CANCEL;
1274 1987
1275 while (activecnt) 1988 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1989
1990 do
1276 { 1991 {
1992#if EV_VERIFY >= 2
1993 ev_loop_verify (EV_A);
1994#endif
1995
1996#ifndef _WIN32
1997 if (expect_false (curpid)) /* penalise the forking check even more */
1998 if (expect_false (getpid () != curpid))
1999 {
2000 curpid = getpid ();
2001 postfork = 1;
2002 }
2003#endif
2004
2005#if EV_FORK_ENABLE
2006 /* we might have forked, so queue fork handlers */
2007 if (expect_false (postfork))
2008 if (forkcnt)
2009 {
2010 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2011 call_pending (EV_A);
2012 }
2013#endif
2014
1277 /* queue check watchers (and execute them) */ 2015 /* queue prepare watchers (and execute them) */
1278 if (expect_false (preparecnt)) 2016 if (expect_false (preparecnt))
1279 { 2017 {
1280 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2018 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1281 call_pending (EV_A); 2019 call_pending (EV_A);
1282 } 2020 }
… …
1288 /* update fd-related kernel structures */ 2026 /* update fd-related kernel structures */
1289 fd_reify (EV_A); 2027 fd_reify (EV_A);
1290 2028
1291 /* calculate blocking time */ 2029 /* calculate blocking time */
1292 { 2030 {
1293 double block; 2031 ev_tstamp waittime = 0.;
2032 ev_tstamp sleeptime = 0.;
1294 2033
1295 if (flags & EVLOOP_NONBLOCK || idlecnt) 2034 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1296 block = 0.; /* do not block at all */
1297 else
1298 { 2035 {
1299 /* update time to cancel out callback processing overhead */ 2036 /* update time to cancel out callback processing overhead */
1300#if EV_USE_MONOTONIC
1301 if (expect_true (have_monotonic))
1302 time_update_monotonic (EV_A); 2037 time_update (EV_A_ 1e100);
1303 else
1304#endif
1305 {
1306 ev_rt_now = ev_time ();
1307 mn_now = ev_rt_now;
1308 }
1309
1310 block = MAX_BLOCKTIME;
1311 2038
1312 if (timercnt) 2039 if (timercnt)
1313 { 2040 {
1314 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 2041 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1315 if (block > to) block = to; 2042 if (waittime > to) waittime = to;
1316 } 2043 }
1317 2044
1318#if EV_PERIODIC_ENABLE 2045#if EV_PERIODIC_ENABLE
1319 if (periodiccnt) 2046 if (periodiccnt)
1320 { 2047 {
1321 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 2048 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1322 if (block > to) block = to; 2049 if (waittime > to) waittime = to;
1323 } 2050 }
1324#endif 2051#endif
1325 2052
1326 if (expect_false (block < 0.)) block = 0.; 2053 if (expect_false (waittime < timeout_blocktime))
2054 waittime = timeout_blocktime;
2055
2056 sleeptime = waittime - backend_fudge;
2057
2058 if (expect_true (sleeptime > io_blocktime))
2059 sleeptime = io_blocktime;
2060
2061 if (sleeptime)
2062 {
2063 ev_sleep (sleeptime);
2064 waittime -= sleeptime;
2065 }
1327 } 2066 }
1328 2067
2068 ++loop_count;
1329 backend_poll (EV_A_ block); 2069 backend_poll (EV_A_ waittime);
2070
2071 /* update ev_rt_now, do magic */
2072 time_update (EV_A_ waittime + sleeptime);
1330 } 2073 }
1331
1332 /* update ev_rt_now, do magic */
1333 time_update (EV_A);
1334 2074
1335 /* queue pending timers and reschedule them */ 2075 /* queue pending timers and reschedule them */
1336 timers_reify (EV_A); /* relative timers called last */ 2076 timers_reify (EV_A); /* relative timers called last */
1337#if EV_PERIODIC_ENABLE 2077#if EV_PERIODIC_ENABLE
1338 periodics_reify (EV_A); /* absolute timers called first */ 2078 periodics_reify (EV_A); /* absolute timers called first */
1339#endif 2079#endif
1340 2080
2081#if EV_IDLE_ENABLE
1341 /* queue idle watchers unless other events are pending */ 2082 /* queue idle watchers unless other events are pending */
1342 if (idlecnt && !any_pending (EV_A)) 2083 idle_reify (EV_A);
1343 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2084#endif
1344 2085
1345 /* queue check watchers, to be executed first */ 2086 /* queue check watchers, to be executed first */
1346 if (expect_false (checkcnt)) 2087 if (expect_false (checkcnt))
1347 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2088 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1348 2089
1349 call_pending (EV_A); 2090 call_pending (EV_A);
1350
1351 if (expect_false (loop_done))
1352 break;
1353 } 2091 }
2092 while (expect_true (
2093 activecnt
2094 && !loop_done
2095 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2096 ));
1354 2097
1355 if (loop_done == EVUNLOOP_ONE) 2098 if (loop_done == EVUNLOOP_ONE)
1356 loop_done = EVUNLOOP_CANCEL; 2099 loop_done = EVUNLOOP_CANCEL;
1357} 2100}
1358 2101
… …
1360ev_unloop (EV_P_ int how) 2103ev_unloop (EV_P_ int how)
1361{ 2104{
1362 loop_done = how; 2105 loop_done = how;
1363} 2106}
1364 2107
2108void
2109ev_ref (EV_P)
2110{
2111 ++activecnt;
2112}
2113
2114void
2115ev_unref (EV_P)
2116{
2117 --activecnt;
2118}
2119
2120void
2121ev_now_update (EV_P)
2122{
2123 time_update (EV_A_ 1e100);
2124}
2125
2126void
2127ev_suspend (EV_P)
2128{
2129 ev_now_update (EV_A);
2130}
2131
2132void
2133ev_resume (EV_P)
2134{
2135 ev_tstamp mn_prev = mn_now;
2136
2137 ev_now_update (EV_A);
2138 timers_reschedule (EV_A_ mn_now - mn_prev);
2139#if EV_PERIODIC_ENABLE
2140 periodics_reschedule (EV_A);
2141#endif
2142}
2143
1365/*****************************************************************************/ 2144/*****************************************************************************/
1366 2145
1367void inline_size 2146inline_size void
1368wlist_add (WL *head, WL elem) 2147wlist_add (WL *head, WL elem)
1369{ 2148{
1370 elem->next = *head; 2149 elem->next = *head;
1371 *head = elem; 2150 *head = elem;
1372} 2151}
1373 2152
1374void inline_size 2153inline_size void
1375wlist_del (WL *head, WL elem) 2154wlist_del (WL *head, WL elem)
1376{ 2155{
1377 while (*head) 2156 while (*head)
1378 { 2157 {
1379 if (*head == elem) 2158 if (*head == elem)
… …
1384 2163
1385 head = &(*head)->next; 2164 head = &(*head)->next;
1386 } 2165 }
1387} 2166}
1388 2167
1389void inline_speed 2168inline_speed void
1390ev_clear_pending (EV_P_ W w) 2169clear_pending (EV_P_ W w)
1391{ 2170{
1392 if (w->pending) 2171 if (w->pending)
1393 { 2172 {
1394 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2173 pendings [ABSPRI (w)][w->pending - 1].w = 0;
1395 w->pending = 0; 2174 w->pending = 0;
1396 } 2175 }
1397} 2176}
1398 2177
1399void inline_speed 2178int
2179ev_clear_pending (EV_P_ void *w)
2180{
2181 W w_ = (W)w;
2182 int pending = w_->pending;
2183
2184 if (expect_true (pending))
2185 {
2186 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2187 w_->pending = 0;
2188 p->w = 0;
2189 return p->events;
2190 }
2191 else
2192 return 0;
2193}
2194
2195inline_size void
2196pri_adjust (EV_P_ W w)
2197{
2198 int pri = w->priority;
2199 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2200 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2201 w->priority = pri;
2202}
2203
2204inline_speed void
1400ev_start (EV_P_ W w, int active) 2205ev_start (EV_P_ W w, int active)
1401{ 2206{
1402 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2207 pri_adjust (EV_A_ w);
1403 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1404
1405 w->active = active; 2208 w->active = active;
1406 ev_ref (EV_A); 2209 ev_ref (EV_A);
1407} 2210}
1408 2211
1409void inline_size 2212inline_size void
1410ev_stop (EV_P_ W w) 2213ev_stop (EV_P_ W w)
1411{ 2214{
1412 ev_unref (EV_A); 2215 ev_unref (EV_A);
1413 w->active = 0; 2216 w->active = 0;
1414} 2217}
1415 2218
1416/*****************************************************************************/ 2219/*****************************************************************************/
1417 2220
1418void 2221void noinline
1419ev_io_start (EV_P_ ev_io *w) 2222ev_io_start (EV_P_ ev_io *w)
1420{ 2223{
1421 int fd = w->fd; 2224 int fd = w->fd;
1422 2225
1423 if (expect_false (ev_is_active (w))) 2226 if (expect_false (ev_is_active (w)))
1424 return; 2227 return;
1425 2228
1426 assert (("ev_io_start called with negative fd", fd >= 0)); 2229 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2230 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2231
2232 EV_FREQUENT_CHECK;
1427 2233
1428 ev_start (EV_A_ (W)w, 1); 2234 ev_start (EV_A_ (W)w, 1);
1429 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2235 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1430 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2236 wlist_add (&anfds[fd].head, (WL)w);
1431 2237
1432 fd_change (EV_A_ fd); 2238 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
1433} 2239 w->events &= ~EV__IOFDSET;
1434 2240
1435void 2241 EV_FREQUENT_CHECK;
2242}
2243
2244void noinline
1436ev_io_stop (EV_P_ ev_io *w) 2245ev_io_stop (EV_P_ ev_io *w)
1437{ 2246{
1438 ev_clear_pending (EV_A_ (W)w); 2247 clear_pending (EV_A_ (W)w);
1439 if (expect_false (!ev_is_active (w))) 2248 if (expect_false (!ev_is_active (w)))
1440 return; 2249 return;
1441 2250
1442 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2251 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1443 2252
2253 EV_FREQUENT_CHECK;
2254
1444 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2255 wlist_del (&anfds[w->fd].head, (WL)w);
1445 ev_stop (EV_A_ (W)w); 2256 ev_stop (EV_A_ (W)w);
1446 2257
1447 fd_change (EV_A_ w->fd); 2258 fd_change (EV_A_ w->fd, 1);
1448}
1449 2259
1450void 2260 EV_FREQUENT_CHECK;
2261}
2262
2263void noinline
1451ev_timer_start (EV_P_ ev_timer *w) 2264ev_timer_start (EV_P_ ev_timer *w)
1452{ 2265{
1453 if (expect_false (ev_is_active (w))) 2266 if (expect_false (ev_is_active (w)))
1454 return; 2267 return;
1455 2268
1456 ((WT)w)->at += mn_now; 2269 ev_at (w) += mn_now;
1457 2270
1458 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2271 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1459 2272
2273 EV_FREQUENT_CHECK;
2274
2275 ++timercnt;
1460 ev_start (EV_A_ (W)w, ++timercnt); 2276 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1461 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 2277 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1462 timers [timercnt - 1] = w; 2278 ANHE_w (timers [ev_active (w)]) = (WT)w;
1463 upheap ((WT *)timers, timercnt - 1); 2279 ANHE_at_cache (timers [ev_active (w)]);
2280 upheap (timers, ev_active (w));
1464 2281
2282 EV_FREQUENT_CHECK;
2283
1465 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2284 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1466} 2285}
1467 2286
1468void 2287void noinline
1469ev_timer_stop (EV_P_ ev_timer *w) 2288ev_timer_stop (EV_P_ ev_timer *w)
1470{ 2289{
1471 ev_clear_pending (EV_A_ (W)w); 2290 clear_pending (EV_A_ (W)w);
1472 if (expect_false (!ev_is_active (w))) 2291 if (expect_false (!ev_is_active (w)))
1473 return; 2292 return;
1474 2293
2294 EV_FREQUENT_CHECK;
2295
2296 {
2297 int active = ev_active (w);
2298
1475 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2299 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1476 2300
2301 --timercnt;
2302
1477 if (expect_true (((W)w)->active < timercnt--)) 2303 if (expect_true (active < timercnt + HEAP0))
1478 { 2304 {
1479 timers [((W)w)->active - 1] = timers [timercnt]; 2305 timers [active] = timers [timercnt + HEAP0];
1480 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2306 adjustheap (timers, timercnt, active);
1481 } 2307 }
2308 }
1482 2309
1483 ((WT)w)->at -= mn_now; 2310 EV_FREQUENT_CHECK;
2311
2312 ev_at (w) -= mn_now;
1484 2313
1485 ev_stop (EV_A_ (W)w); 2314 ev_stop (EV_A_ (W)w);
1486} 2315}
1487 2316
1488void 2317void noinline
1489ev_timer_again (EV_P_ ev_timer *w) 2318ev_timer_again (EV_P_ ev_timer *w)
1490{ 2319{
2320 EV_FREQUENT_CHECK;
2321
1491 if (ev_is_active (w)) 2322 if (ev_is_active (w))
1492 { 2323 {
1493 if (w->repeat) 2324 if (w->repeat)
1494 { 2325 {
1495 ((WT)w)->at = mn_now + w->repeat; 2326 ev_at (w) = mn_now + w->repeat;
2327 ANHE_at_cache (timers [ev_active (w)]);
1496 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2328 adjustheap (timers, timercnt, ev_active (w));
1497 } 2329 }
1498 else 2330 else
1499 ev_timer_stop (EV_A_ w); 2331 ev_timer_stop (EV_A_ w);
1500 } 2332 }
1501 else if (w->repeat) 2333 else if (w->repeat)
1502 { 2334 {
1503 w->at = w->repeat; 2335 ev_at (w) = w->repeat;
1504 ev_timer_start (EV_A_ w); 2336 ev_timer_start (EV_A_ w);
1505 } 2337 }
2338
2339 EV_FREQUENT_CHECK;
1506} 2340}
1507 2341
1508#if EV_PERIODIC_ENABLE 2342#if EV_PERIODIC_ENABLE
1509void 2343void noinline
1510ev_periodic_start (EV_P_ ev_periodic *w) 2344ev_periodic_start (EV_P_ ev_periodic *w)
1511{ 2345{
1512 if (expect_false (ev_is_active (w))) 2346 if (expect_false (ev_is_active (w)))
1513 return; 2347 return;
1514 2348
1515 if (w->reschedule_cb) 2349 if (w->reschedule_cb)
1516 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2350 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1517 else if (w->interval) 2351 else if (w->interval)
1518 { 2352 {
1519 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2353 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1520 /* this formula differs from the one in periodic_reify because we do not always round up */ 2354 /* this formula differs from the one in periodic_reify because we do not always round up */
1521 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2355 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1522 } 2356 }
2357 else
2358 ev_at (w) = w->offset;
1523 2359
2360 EV_FREQUENT_CHECK;
2361
2362 ++periodiccnt;
1524 ev_start (EV_A_ (W)w, ++periodiccnt); 2363 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1525 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 2364 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1526 periodics [periodiccnt - 1] = w; 2365 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1527 upheap ((WT *)periodics, periodiccnt - 1); 2366 ANHE_at_cache (periodics [ev_active (w)]);
2367 upheap (periodics, ev_active (w));
1528 2368
2369 EV_FREQUENT_CHECK;
2370
1529 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2371 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1530} 2372}
1531 2373
1532void 2374void noinline
1533ev_periodic_stop (EV_P_ ev_periodic *w) 2375ev_periodic_stop (EV_P_ ev_periodic *w)
1534{ 2376{
1535 ev_clear_pending (EV_A_ (W)w); 2377 clear_pending (EV_A_ (W)w);
1536 if (expect_false (!ev_is_active (w))) 2378 if (expect_false (!ev_is_active (w)))
1537 return; 2379 return;
1538 2380
2381 EV_FREQUENT_CHECK;
2382
2383 {
2384 int active = ev_active (w);
2385
1539 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2386 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1540 2387
2388 --periodiccnt;
2389
1541 if (expect_true (((W)w)->active < periodiccnt--)) 2390 if (expect_true (active < periodiccnt + HEAP0))
1542 { 2391 {
1543 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2392 periodics [active] = periodics [periodiccnt + HEAP0];
1544 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2393 adjustheap (periodics, periodiccnt, active);
1545 } 2394 }
2395 }
2396
2397 EV_FREQUENT_CHECK;
1546 2398
1547 ev_stop (EV_A_ (W)w); 2399 ev_stop (EV_A_ (W)w);
1548} 2400}
1549 2401
1550void 2402void noinline
1551ev_periodic_again (EV_P_ ev_periodic *w) 2403ev_periodic_again (EV_P_ ev_periodic *w)
1552{ 2404{
1553 /* TODO: use adjustheap and recalculation */ 2405 /* TODO: use adjustheap and recalculation */
1554 ev_periodic_stop (EV_A_ w); 2406 ev_periodic_stop (EV_A_ w);
1555 ev_periodic_start (EV_A_ w); 2407 ev_periodic_start (EV_A_ w);
1556} 2408}
1557#endif 2409#endif
1558 2410
1559void 2411#ifndef SA_RESTART
2412# define SA_RESTART 0
2413#endif
2414
2415void noinline
1560ev_idle_start (EV_P_ ev_idle *w) 2416ev_signal_start (EV_P_ ev_signal *w)
1561{ 2417{
2418#if EV_MULTIPLICITY
2419 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2420#endif
1562 if (expect_false (ev_is_active (w))) 2421 if (expect_false (ev_is_active (w)))
1563 return; 2422 return;
1564 2423
1565 ev_start (EV_A_ (W)w, ++idlecnt); 2424 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
1566 array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1567 idles [idlecnt - 1] = w;
1568}
1569 2425
1570void 2426 evpipe_init (EV_A);
1571ev_idle_stop (EV_P_ ev_idle *w) 2427
1572{ 2428 EV_FREQUENT_CHECK;
1573 ev_clear_pending (EV_A_ (W)w);
1574 if (expect_false (!ev_is_active (w)))
1575 return;
1576 2429
1577 { 2430 {
1578 int active = ((W)w)->active; 2431#ifndef _WIN32
1579 idles [active - 1] = idles [--idlecnt]; 2432 sigset_t full, prev;
1580 ((W)idles [active - 1])->active = active; 2433 sigfillset (&full);
2434 sigprocmask (SIG_SETMASK, &full, &prev);
2435#endif
2436
2437 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
2438
2439#ifndef _WIN32
2440 sigprocmask (SIG_SETMASK, &prev, 0);
2441#endif
1581 } 2442 }
1582 2443
1583 ev_stop (EV_A_ (W)w);
1584}
1585
1586void
1587ev_prepare_start (EV_P_ ev_prepare *w)
1588{
1589 if (expect_false (ev_is_active (w)))
1590 return;
1591
1592 ev_start (EV_A_ (W)w, ++preparecnt);
1593 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1594 prepares [preparecnt - 1] = w;
1595}
1596
1597void
1598ev_prepare_stop (EV_P_ ev_prepare *w)
1599{
1600 ev_clear_pending (EV_A_ (W)w);
1601 if (expect_false (!ev_is_active (w)))
1602 return;
1603
1604 {
1605 int active = ((W)w)->active;
1606 prepares [active - 1] = prepares [--preparecnt];
1607 ((W)prepares [active - 1])->active = active;
1608 }
1609
1610 ev_stop (EV_A_ (W)w);
1611}
1612
1613void
1614ev_check_start (EV_P_ ev_check *w)
1615{
1616 if (expect_false (ev_is_active (w)))
1617 return;
1618
1619 ev_start (EV_A_ (W)w, ++checkcnt);
1620 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1621 checks [checkcnt - 1] = w;
1622}
1623
1624void
1625ev_check_stop (EV_P_ ev_check *w)
1626{
1627 ev_clear_pending (EV_A_ (W)w);
1628 if (expect_false (!ev_is_active (w)))
1629 return;
1630
1631 {
1632 int active = ((W)w)->active;
1633 checks [active - 1] = checks [--checkcnt];
1634 ((W)checks [active - 1])->active = active;
1635 }
1636
1637 ev_stop (EV_A_ (W)w);
1638}
1639
1640#ifndef SA_RESTART
1641# define SA_RESTART 0
1642#endif
1643
1644void
1645ev_signal_start (EV_P_ ev_signal *w)
1646{
1647#if EV_MULTIPLICITY
1648 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1649#endif
1650 if (expect_false (ev_is_active (w)))
1651 return;
1652
1653 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1654
1655 ev_start (EV_A_ (W)w, 1); 2444 ev_start (EV_A_ (W)w, 1);
1656 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1657 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2445 wlist_add (&signals [w->signum - 1].head, (WL)w);
1658 2446
1659 if (!((WL)w)->next) 2447 if (!((WL)w)->next)
1660 { 2448 {
1661#if _WIN32 2449#if _WIN32
1662 signal (w->signum, sighandler); 2450 signal (w->signum, ev_sighandler);
1663#else 2451#else
1664 struct sigaction sa; 2452 struct sigaction sa;
1665 sa.sa_handler = sighandler; 2453 sa.sa_handler = ev_sighandler;
1666 sigfillset (&sa.sa_mask); 2454 sigfillset (&sa.sa_mask);
1667 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2455 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1668 sigaction (w->signum, &sa, 0); 2456 sigaction (w->signum, &sa, 0);
1669#endif 2457#endif
1670 } 2458 }
1671}
1672 2459
1673void 2460 EV_FREQUENT_CHECK;
2461}
2462
2463void noinline
1674ev_signal_stop (EV_P_ ev_signal *w) 2464ev_signal_stop (EV_P_ ev_signal *w)
1675{ 2465{
1676 ev_clear_pending (EV_A_ (W)w); 2466 clear_pending (EV_A_ (W)w);
1677 if (expect_false (!ev_is_active (w))) 2467 if (expect_false (!ev_is_active (w)))
1678 return; 2468 return;
1679 2469
2470 EV_FREQUENT_CHECK;
2471
1680 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2472 wlist_del (&signals [w->signum - 1].head, (WL)w);
1681 ev_stop (EV_A_ (W)w); 2473 ev_stop (EV_A_ (W)w);
1682 2474
1683 if (!signals [w->signum - 1].head) 2475 if (!signals [w->signum - 1].head)
1684 signal (w->signum, SIG_DFL); 2476 signal (w->signum, SIG_DFL);
2477
2478 EV_FREQUENT_CHECK;
1685} 2479}
1686 2480
1687void 2481void
1688ev_child_start (EV_P_ ev_child *w) 2482ev_child_start (EV_P_ ev_child *w)
1689{ 2483{
1690#if EV_MULTIPLICITY 2484#if EV_MULTIPLICITY
1691 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 2485 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1692#endif 2486#endif
1693 if (expect_false (ev_is_active (w))) 2487 if (expect_false (ev_is_active (w)))
1694 return; 2488 return;
1695 2489
2490 EV_FREQUENT_CHECK;
2491
1696 ev_start (EV_A_ (W)w, 1); 2492 ev_start (EV_A_ (W)w, 1);
1697 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2493 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2494
2495 EV_FREQUENT_CHECK;
1698} 2496}
1699 2497
1700void 2498void
1701ev_child_stop (EV_P_ ev_child *w) 2499ev_child_stop (EV_P_ ev_child *w)
1702{ 2500{
1703 ev_clear_pending (EV_A_ (W)w); 2501 clear_pending (EV_A_ (W)w);
1704 if (expect_false (!ev_is_active (w))) 2502 if (expect_false (!ev_is_active (w)))
1705 return; 2503 return;
1706 2504
2505 EV_FREQUENT_CHECK;
2506
1707 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 2507 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1708 ev_stop (EV_A_ (W)w); 2508 ev_stop (EV_A_ (W)w);
1709}
1710 2509
2510 EV_FREQUENT_CHECK;
2511}
2512
1711#if EV_EMBED_ENABLE 2513#if EV_STAT_ENABLE
2514
2515# ifdef _WIN32
2516# undef lstat
2517# define lstat(a,b) _stati64 (a,b)
2518# endif
2519
2520#define DEF_STAT_INTERVAL 5.0074891
2521#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2522#define MIN_STAT_INTERVAL 0.1074891
2523
2524static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2525
2526#if EV_USE_INOTIFY
2527# define EV_INOTIFY_BUFSIZE 8192
2528
1712void noinline 2529static void noinline
1713ev_embed_sweep (EV_P_ ev_embed *w) 2530infy_add (EV_P_ ev_stat *w)
1714{ 2531{
1715 ev_loop (w->loop, EVLOOP_NONBLOCK); 2532 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);
2533
2534 if (w->wd < 0)
2535 {
2536 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2537 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
2538
2539 /* monitor some parent directory for speedup hints */
2540 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2541 /* but an efficiency issue only */
2542 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2543 {
2544 char path [4096];
2545 strcpy (path, w->path);
2546
2547 do
2548 {
2549 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2550 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2551
2552 char *pend = strrchr (path, '/');
2553
2554 if (!pend || pend == path)
2555 break;
2556
2557 *pend = 0;
2558 w->wd = inotify_add_watch (fs_fd, path, mask);
2559 }
2560 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2561 }
2562 }
2563
2564 if (w->wd >= 0)
2565 {
2566 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2567
2568 /* now local changes will be tracked by inotify, but remote changes won't */
2569 /* unless the filesystem it known to be local, we therefore still poll */
2570 /* also do poll on <2.6.25, but with normal frequency */
2571 struct statfs sfs;
2572
2573 if (fs_2625 && !statfs (w->path, &sfs))
2574 if (sfs.f_type == 0x1373 /* devfs */
2575 || sfs.f_type == 0xEF53 /* ext2/3 */
2576 || sfs.f_type == 0x3153464a /* jfs */
2577 || sfs.f_type == 0x52654973 /* reiser3 */
2578 || sfs.f_type == 0x01021994 /* tempfs */
2579 || sfs.f_type == 0x58465342 /* xfs */)
2580 return;
2581
2582 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2583 ev_timer_again (EV_A_ &w->timer);
2584 }
2585}
2586
2587static void noinline
2588infy_del (EV_P_ ev_stat *w)
2589{
2590 int slot;
2591 int wd = w->wd;
2592
2593 if (wd < 0)
2594 return;
2595
2596 w->wd = -2;
2597 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2598 wlist_del (&fs_hash [slot].head, (WL)w);
2599
2600 /* remove this watcher, if others are watching it, they will rearm */
2601 inotify_rm_watch (fs_fd, wd);
2602}
2603
2604static void noinline
2605infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2606{
2607 if (slot < 0)
2608 /* overflow, need to check for all hash slots */
2609 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2610 infy_wd (EV_A_ slot, wd, ev);
2611 else
2612 {
2613 WL w_;
2614
2615 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2616 {
2617 ev_stat *w = (ev_stat *)w_;
2618 w_ = w_->next; /* lets us remove this watcher and all before it */
2619
2620 if (w->wd == wd || wd == -1)
2621 {
2622 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2623 {
2624 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2625 w->wd = -1;
2626 infy_add (EV_A_ w); /* re-add, no matter what */
2627 }
2628
2629 stat_timer_cb (EV_A_ &w->timer, 0);
2630 }
2631 }
2632 }
1716} 2633}
1717 2634
1718static void 2635static void
1719embed_cb (EV_P_ ev_io *io, int revents) 2636infy_cb (EV_P_ ev_io *w, int revents)
1720{ 2637{
1721 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 2638 char buf [EV_INOTIFY_BUFSIZE];
2639 struct inotify_event *ev = (struct inotify_event *)buf;
2640 int ofs;
2641 int len = read (fs_fd, buf, sizeof (buf));
1722 2642
1723 if (ev_cb (w)) 2643 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
1724 ev_feed_event (EV_A_ (W)w, EV_EMBED); 2644 infy_wd (EV_A_ ev->wd, ev->wd, ev);
1725 else
1726 ev_embed_sweep (loop, w);
1727} 2645}
1728 2646
1729void 2647inline_size void
1730ev_embed_start (EV_P_ ev_embed *w) 2648check_2625 (EV_P)
1731{ 2649{
1732 if (expect_false (ev_is_active (w))) 2650 /* kernels < 2.6.25 are borked
2651 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2652 */
2653 struct utsname buf;
2654 int major, minor, micro;
2655
2656 if (uname (&buf))
1733 return; 2657 return;
1734 2658
1735 { 2659 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
1736 struct ev_loop *loop = w->loop;
1737 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
1738 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
1739 }
1740
1741 ev_set_priority (&w->io, ev_priority (w));
1742 ev_io_start (EV_A_ &w->io);
1743
1744 ev_start (EV_A_ (W)w, 1);
1745}
1746
1747void
1748ev_embed_stop (EV_P_ ev_embed *w)
1749{
1750 ev_clear_pending (EV_A_ (W)w);
1751 if (expect_false (!ev_is_active (w)))
1752 return; 2660 return;
1753 2661
1754 ev_io_stop (EV_A_ &w->io); 2662 if (major < 2
2663 || (major == 2 && minor < 6)
2664 || (major == 2 && minor == 6 && micro < 25))
2665 return;
1755 2666
1756 ev_stop (EV_A_ (W)w); 2667 fs_2625 = 1;
1757} 2668}
1758#endif
1759 2669
1760#if EV_STAT_ENABLE 2670inline_size void
2671infy_init (EV_P)
2672{
2673 if (fs_fd != -2)
2674 return;
1761 2675
2676 fs_fd = -1;
2677
2678 check_2625 (EV_A);
2679
2680 fs_fd = inotify_init ();
2681
2682 if (fs_fd >= 0)
2683 {
2684 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2685 ev_set_priority (&fs_w, EV_MAXPRI);
2686 ev_io_start (EV_A_ &fs_w);
2687 }
2688}
2689
2690inline_size void
2691infy_fork (EV_P)
2692{
2693 int slot;
2694
2695 if (fs_fd < 0)
2696 return;
2697
2698 close (fs_fd);
2699 fs_fd = inotify_init ();
2700
2701 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2702 {
2703 WL w_ = fs_hash [slot].head;
2704 fs_hash [slot].head = 0;
2705
2706 while (w_)
2707 {
2708 ev_stat *w = (ev_stat *)w_;
2709 w_ = w_->next; /* lets us add this watcher */
2710
2711 w->wd = -1;
2712
2713 if (fs_fd >= 0)
2714 infy_add (EV_A_ w); /* re-add, no matter what */
2715 else
2716 ev_timer_again (EV_A_ &w->timer);
2717 }
2718 }
2719}
2720
2721#endif
2722
1762# ifdef _WIN32 2723#ifdef _WIN32
1763# define lstat(a,b) stat(a,b) 2724# define EV_LSTAT(p,b) _stati64 (p, b)
2725#else
2726# define EV_LSTAT(p,b) lstat (p, b)
1764# endif 2727#endif
1765 2728
1766void 2729void
1767ev_stat_stat (EV_P_ ev_stat *w) 2730ev_stat_stat (EV_P_ ev_stat *w)
1768{ 2731{
1769 if (lstat (w->path, &w->attr) < 0) 2732 if (lstat (w->path, &w->attr) < 0)
1770 w->attr.st_nlink = 0; 2733 w->attr.st_nlink = 0;
1771 else if (!w->attr.st_nlink) 2734 else if (!w->attr.st_nlink)
1772 w->attr.st_nlink = 1; 2735 w->attr.st_nlink = 1;
1773} 2736}
1774 2737
1775static void 2738static void noinline
1776stat_timer_cb (EV_P_ ev_timer *w_, int revents) 2739stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1777{ 2740{
1778 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 2741 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
1779 2742
1780 /* we copy this here each the time so that */ 2743 /* we copy this here each the time so that */
1781 /* prev has the old value when the callback gets invoked */ 2744 /* prev has the old value when the callback gets invoked */
1782 w->prev = w->attr; 2745 w->prev = w->attr;
1783 ev_stat_stat (EV_A_ w); 2746 ev_stat_stat (EV_A_ w);
1784 2747
1785 if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata))) 2748 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2749 if (
2750 w->prev.st_dev != w->attr.st_dev
2751 || w->prev.st_ino != w->attr.st_ino
2752 || w->prev.st_mode != w->attr.st_mode
2753 || w->prev.st_nlink != w->attr.st_nlink
2754 || w->prev.st_uid != w->attr.st_uid
2755 || w->prev.st_gid != w->attr.st_gid
2756 || w->prev.st_rdev != w->attr.st_rdev
2757 || w->prev.st_size != w->attr.st_size
2758 || w->prev.st_atime != w->attr.st_atime
2759 || w->prev.st_mtime != w->attr.st_mtime
2760 || w->prev.st_ctime != w->attr.st_ctime
2761 ) {
2762 #if EV_USE_INOTIFY
2763 if (fs_fd >= 0)
2764 {
2765 infy_del (EV_A_ w);
2766 infy_add (EV_A_ w);
2767 ev_stat_stat (EV_A_ w); /* avoid race... */
2768 }
2769 #endif
2770
1786 ev_feed_event (EV_A_ w, EV_STAT); 2771 ev_feed_event (EV_A_ w, EV_STAT);
2772 }
1787} 2773}
1788 2774
1789void 2775void
1790ev_stat_start (EV_P_ ev_stat *w) 2776ev_stat_start (EV_P_ ev_stat *w)
1791{ 2777{
1792 if (expect_false (ev_is_active (w))) 2778 if (expect_false (ev_is_active (w)))
1793 return; 2779 return;
1794 2780
1795 /* since we use memcmp, we need to clear any padding data etc. */
1796 memset (&w->prev, 0, sizeof (ev_statdata));
1797 memset (&w->attr, 0, sizeof (ev_statdata));
1798
1799 ev_stat_stat (EV_A_ w); 2781 ev_stat_stat (EV_A_ w);
1800 2782
2783 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2784 w->interval = MIN_STAT_INTERVAL;
2785
1801 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 2786 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
1802 ev_set_priority (&w->timer, ev_priority (w)); 2787 ev_set_priority (&w->timer, ev_priority (w));
2788
2789#if EV_USE_INOTIFY
2790 infy_init (EV_A);
2791
2792 if (fs_fd >= 0)
2793 infy_add (EV_A_ w);
2794 else
2795#endif
1803 ev_timer_start (EV_A_ &w->timer); 2796 ev_timer_again (EV_A_ &w->timer);
1804 2797
1805 ev_start (EV_A_ (W)w, 1); 2798 ev_start (EV_A_ (W)w, 1);
2799
2800 EV_FREQUENT_CHECK;
1806} 2801}
1807 2802
1808void 2803void
1809ev_stat_stop (EV_P_ ev_stat *w) 2804ev_stat_stop (EV_P_ ev_stat *w)
1810{ 2805{
1811 ev_clear_pending (EV_A_ (W)w); 2806 clear_pending (EV_A_ (W)w);
1812 if (expect_false (!ev_is_active (w))) 2807 if (expect_false (!ev_is_active (w)))
1813 return; 2808 return;
1814 2809
2810 EV_FREQUENT_CHECK;
2811
2812#if EV_USE_INOTIFY
2813 infy_del (EV_A_ w);
2814#endif
1815 ev_timer_stop (EV_A_ &w->timer); 2815 ev_timer_stop (EV_A_ &w->timer);
1816 2816
1817 ev_stop (EV_A_ (W)w); 2817 ev_stop (EV_A_ (W)w);
2818
2819 EV_FREQUENT_CHECK;
2820}
2821#endif
2822
2823#if EV_IDLE_ENABLE
2824void
2825ev_idle_start (EV_P_ ev_idle *w)
2826{
2827 if (expect_false (ev_is_active (w)))
2828 return;
2829
2830 pri_adjust (EV_A_ (W)w);
2831
2832 EV_FREQUENT_CHECK;
2833
2834 {
2835 int active = ++idlecnt [ABSPRI (w)];
2836
2837 ++idleall;
2838 ev_start (EV_A_ (W)w, active);
2839
2840 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2841 idles [ABSPRI (w)][active - 1] = w;
2842 }
2843
2844 EV_FREQUENT_CHECK;
2845}
2846
2847void
2848ev_idle_stop (EV_P_ ev_idle *w)
2849{
2850 clear_pending (EV_A_ (W)w);
2851 if (expect_false (!ev_is_active (w)))
2852 return;
2853
2854 EV_FREQUENT_CHECK;
2855
2856 {
2857 int active = ev_active (w);
2858
2859 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2860 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2861
2862 ev_stop (EV_A_ (W)w);
2863 --idleall;
2864 }
2865
2866 EV_FREQUENT_CHECK;
2867}
2868#endif
2869
2870void
2871ev_prepare_start (EV_P_ ev_prepare *w)
2872{
2873 if (expect_false (ev_is_active (w)))
2874 return;
2875
2876 EV_FREQUENT_CHECK;
2877
2878 ev_start (EV_A_ (W)w, ++preparecnt);
2879 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2880 prepares [preparecnt - 1] = w;
2881
2882 EV_FREQUENT_CHECK;
2883}
2884
2885void
2886ev_prepare_stop (EV_P_ ev_prepare *w)
2887{
2888 clear_pending (EV_A_ (W)w);
2889 if (expect_false (!ev_is_active (w)))
2890 return;
2891
2892 EV_FREQUENT_CHECK;
2893
2894 {
2895 int active = ev_active (w);
2896
2897 prepares [active - 1] = prepares [--preparecnt];
2898 ev_active (prepares [active - 1]) = active;
2899 }
2900
2901 ev_stop (EV_A_ (W)w);
2902
2903 EV_FREQUENT_CHECK;
2904}
2905
2906void
2907ev_check_start (EV_P_ ev_check *w)
2908{
2909 if (expect_false (ev_is_active (w)))
2910 return;
2911
2912 EV_FREQUENT_CHECK;
2913
2914 ev_start (EV_A_ (W)w, ++checkcnt);
2915 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2916 checks [checkcnt - 1] = w;
2917
2918 EV_FREQUENT_CHECK;
2919}
2920
2921void
2922ev_check_stop (EV_P_ ev_check *w)
2923{
2924 clear_pending (EV_A_ (W)w);
2925 if (expect_false (!ev_is_active (w)))
2926 return;
2927
2928 EV_FREQUENT_CHECK;
2929
2930 {
2931 int active = ev_active (w);
2932
2933 checks [active - 1] = checks [--checkcnt];
2934 ev_active (checks [active - 1]) = active;
2935 }
2936
2937 ev_stop (EV_A_ (W)w);
2938
2939 EV_FREQUENT_CHECK;
2940}
2941
2942#if EV_EMBED_ENABLE
2943void noinline
2944ev_embed_sweep (EV_P_ ev_embed *w)
2945{
2946 ev_loop (w->other, EVLOOP_NONBLOCK);
2947}
2948
2949static void
2950embed_io_cb (EV_P_ ev_io *io, int revents)
2951{
2952 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2953
2954 if (ev_cb (w))
2955 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2956 else
2957 ev_loop (w->other, EVLOOP_NONBLOCK);
2958}
2959
2960static void
2961embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2962{
2963 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2964
2965 {
2966 struct ev_loop *loop = w->other;
2967
2968 while (fdchangecnt)
2969 {
2970 fd_reify (EV_A);
2971 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2972 }
2973 }
2974}
2975
2976static void
2977embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2978{
2979 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2980
2981 ev_embed_stop (EV_A_ w);
2982
2983 {
2984 struct ev_loop *loop = w->other;
2985
2986 ev_loop_fork (EV_A);
2987 ev_loop (EV_A_ EVLOOP_NONBLOCK);
2988 }
2989
2990 ev_embed_start (EV_A_ w);
2991}
2992
2993#if 0
2994static void
2995embed_idle_cb (EV_P_ ev_idle *idle, int revents)
2996{
2997 ev_idle_stop (EV_A_ idle);
2998}
2999#endif
3000
3001void
3002ev_embed_start (EV_P_ ev_embed *w)
3003{
3004 if (expect_false (ev_is_active (w)))
3005 return;
3006
3007 {
3008 struct ev_loop *loop = w->other;
3009 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3010 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3011 }
3012
3013 EV_FREQUENT_CHECK;
3014
3015 ev_set_priority (&w->io, ev_priority (w));
3016 ev_io_start (EV_A_ &w->io);
3017
3018 ev_prepare_init (&w->prepare, embed_prepare_cb);
3019 ev_set_priority (&w->prepare, EV_MINPRI);
3020 ev_prepare_start (EV_A_ &w->prepare);
3021
3022 ev_fork_init (&w->fork, embed_fork_cb);
3023 ev_fork_start (EV_A_ &w->fork);
3024
3025 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3026
3027 ev_start (EV_A_ (W)w, 1);
3028
3029 EV_FREQUENT_CHECK;
3030}
3031
3032void
3033ev_embed_stop (EV_P_ ev_embed *w)
3034{
3035 clear_pending (EV_A_ (W)w);
3036 if (expect_false (!ev_is_active (w)))
3037 return;
3038
3039 EV_FREQUENT_CHECK;
3040
3041 ev_io_stop (EV_A_ &w->io);
3042 ev_prepare_stop (EV_A_ &w->prepare);
3043 ev_fork_stop (EV_A_ &w->fork);
3044
3045 EV_FREQUENT_CHECK;
3046}
3047#endif
3048
3049#if EV_FORK_ENABLE
3050void
3051ev_fork_start (EV_P_ ev_fork *w)
3052{
3053 if (expect_false (ev_is_active (w)))
3054 return;
3055
3056 EV_FREQUENT_CHECK;
3057
3058 ev_start (EV_A_ (W)w, ++forkcnt);
3059 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3060 forks [forkcnt - 1] = w;
3061
3062 EV_FREQUENT_CHECK;
3063}
3064
3065void
3066ev_fork_stop (EV_P_ ev_fork *w)
3067{
3068 clear_pending (EV_A_ (W)w);
3069 if (expect_false (!ev_is_active (w)))
3070 return;
3071
3072 EV_FREQUENT_CHECK;
3073
3074 {
3075 int active = ev_active (w);
3076
3077 forks [active - 1] = forks [--forkcnt];
3078 ev_active (forks [active - 1]) = active;
3079 }
3080
3081 ev_stop (EV_A_ (W)w);
3082
3083 EV_FREQUENT_CHECK;
3084}
3085#endif
3086
3087#if EV_ASYNC_ENABLE
3088void
3089ev_async_start (EV_P_ ev_async *w)
3090{
3091 if (expect_false (ev_is_active (w)))
3092 return;
3093
3094 evpipe_init (EV_A);
3095
3096 EV_FREQUENT_CHECK;
3097
3098 ev_start (EV_A_ (W)w, ++asynccnt);
3099 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3100 asyncs [asynccnt - 1] = w;
3101
3102 EV_FREQUENT_CHECK;
3103}
3104
3105void
3106ev_async_stop (EV_P_ ev_async *w)
3107{
3108 clear_pending (EV_A_ (W)w);
3109 if (expect_false (!ev_is_active (w)))
3110 return;
3111
3112 EV_FREQUENT_CHECK;
3113
3114 {
3115 int active = ev_active (w);
3116
3117 asyncs [active - 1] = asyncs [--asynccnt];
3118 ev_active (asyncs [active - 1]) = active;
3119 }
3120
3121 ev_stop (EV_A_ (W)w);
3122
3123 EV_FREQUENT_CHECK;
3124}
3125
3126void
3127ev_async_send (EV_P_ ev_async *w)
3128{
3129 w->sent = 1;
3130 evpipe_write (EV_A_ &gotasync);
1818} 3131}
1819#endif 3132#endif
1820 3133
1821/*****************************************************************************/ 3134/*****************************************************************************/
1822 3135
… …
1832once_cb (EV_P_ struct ev_once *once, int revents) 3145once_cb (EV_P_ struct ev_once *once, int revents)
1833{ 3146{
1834 void (*cb)(int revents, void *arg) = once->cb; 3147 void (*cb)(int revents, void *arg) = once->cb;
1835 void *arg = once->arg; 3148 void *arg = once->arg;
1836 3149
1837 ev_io_stop (EV_A_ &once->io); 3150 ev_io_stop (EV_A_ &once->io);
1838 ev_timer_stop (EV_A_ &once->to); 3151 ev_timer_stop (EV_A_ &once->to);
1839 ev_free (once); 3152 ev_free (once);
1840 3153
1841 cb (revents, arg); 3154 cb (revents, arg);
1842} 3155}
1843 3156
1844static void 3157static void
1845once_cb_io (EV_P_ ev_io *w, int revents) 3158once_cb_io (EV_P_ ev_io *w, int revents)
1846{ 3159{
1847 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3160 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3161
3162 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1848} 3163}
1849 3164
1850static void 3165static void
1851once_cb_to (EV_P_ ev_timer *w, int revents) 3166once_cb_to (EV_P_ ev_timer *w, int revents)
1852{ 3167{
1853 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3168 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3169
3170 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1854} 3171}
1855 3172
1856void 3173void
1857ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3174ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1858{ 3175{
… …
1880 ev_timer_set (&once->to, timeout, 0.); 3197 ev_timer_set (&once->to, timeout, 0.);
1881 ev_timer_start (EV_A_ &once->to); 3198 ev_timer_start (EV_A_ &once->to);
1882 } 3199 }
1883} 3200}
1884 3201
3202/*****************************************************************************/
3203
3204#if 0
3205void
3206ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3207{
3208 int i, j;
3209 ev_watcher_list *wl, *wn;
3210
3211 if (types & (EV_IO | EV_EMBED))
3212 for (i = 0; i < anfdmax; ++i)
3213 for (wl = anfds [i].head; wl; )
3214 {
3215 wn = wl->next;
3216
3217#if EV_EMBED_ENABLE
3218 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3219 {
3220 if (types & EV_EMBED)
3221 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3222 }
3223 else
3224#endif
3225#if EV_USE_INOTIFY
3226 if (ev_cb ((ev_io *)wl) == infy_cb)
3227 ;
3228 else
3229#endif
3230 if ((ev_io *)wl != &pipeev)
3231 if (types & EV_IO)
3232 cb (EV_A_ EV_IO, wl);
3233
3234 wl = wn;
3235 }
3236
3237 if (types & (EV_TIMER | EV_STAT))
3238 for (i = timercnt + HEAP0; i-- > HEAP0; )
3239#if EV_STAT_ENABLE
3240 /*TODO: timer is not always active*/
3241 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3242 {
3243 if (types & EV_STAT)
3244 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3245 }
3246 else
3247#endif
3248 if (types & EV_TIMER)
3249 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3250
3251#if EV_PERIODIC_ENABLE
3252 if (types & EV_PERIODIC)
3253 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3254 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3255#endif
3256
3257#if EV_IDLE_ENABLE
3258 if (types & EV_IDLE)
3259 for (j = NUMPRI; i--; )
3260 for (i = idlecnt [j]; i--; )
3261 cb (EV_A_ EV_IDLE, idles [j][i]);
3262#endif
3263
3264#if EV_FORK_ENABLE
3265 if (types & EV_FORK)
3266 for (i = forkcnt; i--; )
3267 if (ev_cb (forks [i]) != embed_fork_cb)
3268 cb (EV_A_ EV_FORK, forks [i]);
3269#endif
3270
3271#if EV_ASYNC_ENABLE
3272 if (types & EV_ASYNC)
3273 for (i = asynccnt; i--; )
3274 cb (EV_A_ EV_ASYNC, asyncs [i]);
3275#endif
3276
3277 if (types & EV_PREPARE)
3278 for (i = preparecnt; i--; )
3279#if EV_EMBED_ENABLE
3280 if (ev_cb (prepares [i]) != embed_prepare_cb)
3281#endif
3282 cb (EV_A_ EV_PREPARE, prepares [i]);
3283
3284 if (types & EV_CHECK)
3285 for (i = checkcnt; i--; )
3286 cb (EV_A_ EV_CHECK, checks [i]);
3287
3288 if (types & EV_SIGNAL)
3289 for (i = 0; i < signalmax; ++i)
3290 for (wl = signals [i].head; wl; )
3291 {
3292 wn = wl->next;
3293 cb (EV_A_ EV_SIGNAL, wl);
3294 wl = wn;
3295 }
3296
3297 if (types & EV_CHILD)
3298 for (i = EV_PID_HASHSIZE; i--; )
3299 for (wl = childs [i]; wl; )
3300 {
3301 wn = wl->next;
3302 cb (EV_A_ EV_CHILD, wl);
3303 wl = wn;
3304 }
3305/* EV_STAT 0x00001000 /* stat data changed */
3306/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3307}
3308#endif
3309
3310#if EV_MULTIPLICITY
3311 #include "ev_wrap.h"
3312#endif
3313
1885#ifdef __cplusplus 3314#ifdef __cplusplus
1886} 3315}
1887#endif 3316#endif
1888 3317

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