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Comparing libev/ev.c (file contents):
Revision 1.186 by root, Sat Dec 15 23:14:38 2007 UTC vs.
Revision 1.293 by root, Mon Jun 29 18:46:52 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# elif !defined(EV_USE_CLOCK_SYSCALL)
63# define EV_USE_CLOCK_SYSCALL 0
64# endif
65
43# if HAVE_CLOCK_GETTIME 66# if HAVE_CLOCK_GETTIME
44# ifndef EV_USE_MONOTONIC 67# ifndef EV_USE_MONOTONIC
45# define EV_USE_MONOTONIC 1 68# define EV_USE_MONOTONIC 1
46# endif 69# endif
47# ifndef EV_USE_REALTIME 70# ifndef EV_USE_REALTIME
48# define EV_USE_REALTIME 1 71# define EV_USE_REALTIME 0
49# endif 72# endif
50# else 73# else
51# ifndef EV_USE_MONOTONIC 74# ifndef EV_USE_MONOTONIC
52# define EV_USE_MONOTONIC 0 75# define EV_USE_MONOTONIC 0
53# endif 76# endif
54# ifndef EV_USE_REALTIME 77# ifndef EV_USE_REALTIME
55# define EV_USE_REALTIME 0 78# define EV_USE_REALTIME 0
79# endif
80# endif
81
82# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
84# define EV_USE_NANOSLEEP 1
85# else
86# define EV_USE_NANOSLEEP 0
56# endif 87# endif
57# endif 88# endif
58 89
59# ifndef EV_USE_SELECT 90# ifndef EV_USE_SELECT
60# if HAVE_SELECT && HAVE_SYS_SELECT_H 91# if HAVE_SELECT && HAVE_SYS_SELECT_H
… …
102# else 133# else
103# define EV_USE_INOTIFY 0 134# define EV_USE_INOTIFY 0
104# endif 135# endif
105# endif 136# endif
106 137
138# ifndef EV_USE_EVENTFD
139# if HAVE_EVENTFD
140# define EV_USE_EVENTFD 1
141# else
142# define EV_USE_EVENTFD 0
143# endif
144# endif
145
107#endif 146#endif
108 147
109#include <math.h> 148#include <math.h>
110#include <stdlib.h> 149#include <stdlib.h>
111#include <fcntl.h> 150#include <fcntl.h>
… …
129#ifndef _WIN32 168#ifndef _WIN32
130# include <sys/time.h> 169# include <sys/time.h>
131# include <sys/wait.h> 170# include <sys/wait.h>
132# include <unistd.h> 171# include <unistd.h>
133#else 172#else
173# include <io.h>
134# define WIN32_LEAN_AND_MEAN 174# define WIN32_LEAN_AND_MEAN
135# include <windows.h> 175# include <windows.h>
136# ifndef EV_SELECT_IS_WINSOCKET 176# ifndef EV_SELECT_IS_WINSOCKET
137# define EV_SELECT_IS_WINSOCKET 1 177# define EV_SELECT_IS_WINSOCKET 1
138# endif 178# endif
139#endif 179#endif
140 180
141/**/ 181/* this block tries to deduce configuration from header-defined symbols and defaults */
182
183#ifndef EV_USE_CLOCK_SYSCALL
184# if __linux && __GLIBC__ >= 2
185# define EV_USE_CLOCK_SYSCALL 1
186# else
187# define EV_USE_CLOCK_SYSCALL 0
188# endif
189#endif
142 190
143#ifndef EV_USE_MONOTONIC 191#ifndef EV_USE_MONOTONIC
192# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
193# define EV_USE_MONOTONIC 1
194# else
144# define EV_USE_MONOTONIC 0 195# define EV_USE_MONOTONIC 0
196# endif
145#endif 197#endif
146 198
147#ifndef EV_USE_REALTIME 199#ifndef EV_USE_REALTIME
148# define EV_USE_REALTIME 0 200# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
201#endif
202
203#ifndef EV_USE_NANOSLEEP
204# if _POSIX_C_SOURCE >= 199309L
205# define EV_USE_NANOSLEEP 1
206# else
207# define EV_USE_NANOSLEEP 0
208# endif
149#endif 209#endif
150 210
151#ifndef EV_USE_SELECT 211#ifndef EV_USE_SELECT
152# define EV_USE_SELECT 1 212# define EV_USE_SELECT 1
153#endif 213#endif
… …
159# define EV_USE_POLL 1 219# define EV_USE_POLL 1
160# endif 220# endif
161#endif 221#endif
162 222
163#ifndef EV_USE_EPOLL 223#ifndef EV_USE_EPOLL
224# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
225# define EV_USE_EPOLL 1
226# else
164# define EV_USE_EPOLL 0 227# define EV_USE_EPOLL 0
228# endif
165#endif 229#endif
166 230
167#ifndef EV_USE_KQUEUE 231#ifndef EV_USE_KQUEUE
168# define EV_USE_KQUEUE 0 232# define EV_USE_KQUEUE 0
169#endif 233#endif
… …
171#ifndef EV_USE_PORT 235#ifndef EV_USE_PORT
172# define EV_USE_PORT 0 236# define EV_USE_PORT 0
173#endif 237#endif
174 238
175#ifndef EV_USE_INOTIFY 239#ifndef EV_USE_INOTIFY
240# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
241# define EV_USE_INOTIFY 1
242# else
176# define EV_USE_INOTIFY 0 243# define EV_USE_INOTIFY 0
244# endif
177#endif 245#endif
178 246
179#ifndef EV_PID_HASHSIZE 247#ifndef EV_PID_HASHSIZE
180# if EV_MINIMAL 248# if EV_MINIMAL
181# define EV_PID_HASHSIZE 1 249# define EV_PID_HASHSIZE 1
… …
190# else 258# else
191# define EV_INOTIFY_HASHSIZE 16 259# define EV_INOTIFY_HASHSIZE 16
192# endif 260# endif
193#endif 261#endif
194 262
195/**/ 263#ifndef EV_USE_EVENTFD
264# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
265# define EV_USE_EVENTFD 1
266# else
267# define EV_USE_EVENTFD 0
268# endif
269#endif
270
271#if 0 /* debugging */
272# define EV_VERIFY 3
273# define EV_USE_4HEAP 1
274# define EV_HEAP_CACHE_AT 1
275#endif
276
277#ifndef EV_VERIFY
278# define EV_VERIFY !EV_MINIMAL
279#endif
280
281#ifndef EV_USE_4HEAP
282# define EV_USE_4HEAP !EV_MINIMAL
283#endif
284
285#ifndef EV_HEAP_CACHE_AT
286# define EV_HEAP_CACHE_AT !EV_MINIMAL
287#endif
288
289/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
290/* which makes programs even slower. might work on other unices, too. */
291#if EV_USE_CLOCK_SYSCALL
292# include <syscall.h>
293# ifdef SYS_clock_gettime
294# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
295# undef EV_USE_MONOTONIC
296# define EV_USE_MONOTONIC 1
297# else
298# undef EV_USE_CLOCK_SYSCALL
299# define EV_USE_CLOCK_SYSCALL 0
300# endif
301#endif
302
303/* this block fixes any misconfiguration where we know we run into trouble otherwise */
196 304
197#ifndef CLOCK_MONOTONIC 305#ifndef CLOCK_MONOTONIC
198# undef EV_USE_MONOTONIC 306# undef EV_USE_MONOTONIC
199# define EV_USE_MONOTONIC 0 307# define EV_USE_MONOTONIC 0
200#endif 308#endif
… …
207#if !EV_STAT_ENABLE 315#if !EV_STAT_ENABLE
208# undef EV_USE_INOTIFY 316# undef EV_USE_INOTIFY
209# define EV_USE_INOTIFY 0 317# define EV_USE_INOTIFY 0
210#endif 318#endif
211 319
320#if !EV_USE_NANOSLEEP
321# ifndef _WIN32
322# include <sys/select.h>
323# endif
324#endif
325
212#if EV_USE_INOTIFY 326#if EV_USE_INOTIFY
327# include <sys/utsname.h>
328# include <sys/statfs.h>
213# include <sys/inotify.h> 329# include <sys/inotify.h>
330/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
331# ifndef IN_DONT_FOLLOW
332# undef EV_USE_INOTIFY
333# define EV_USE_INOTIFY 0
334# endif
214#endif 335#endif
215 336
216#if EV_SELECT_IS_WINSOCKET 337#if EV_SELECT_IS_WINSOCKET
217# include <winsock.h> 338# include <winsock.h>
218#endif 339#endif
219 340
341#if EV_USE_EVENTFD
342/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
343# include <stdint.h>
344# ifdef __cplusplus
345extern "C" {
346# endif
347int eventfd (unsigned int initval, int flags);
348# ifdef __cplusplus
349}
350# endif
351#endif
352
220/**/ 353/**/
354
355#if EV_VERIFY >= 3
356# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
357#else
358# define EV_FREQUENT_CHECK do { } while (0)
359#endif
221 360
222/* 361/*
223 * This is used to avoid floating point rounding problems. 362 * This is used to avoid floating point rounding problems.
224 * It is added to ev_rt_now when scheduling periodics 363 * It is added to ev_rt_now when scheduling periodics
225 * to ensure progress, time-wise, even when rounding 364 * to ensure progress, time-wise, even when rounding
… …
237# define expect(expr,value) __builtin_expect ((expr),(value)) 376# define expect(expr,value) __builtin_expect ((expr),(value))
238# define noinline __attribute__ ((noinline)) 377# define noinline __attribute__ ((noinline))
239#else 378#else
240# define expect(expr,value) (expr) 379# define expect(expr,value) (expr)
241# define noinline 380# define noinline
242# if __STDC_VERSION__ < 199901L 381# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
243# define inline 382# define inline
244# endif 383# endif
245#endif 384#endif
246 385
247#define expect_false(expr) expect ((expr) != 0, 0) 386#define expect_false(expr) expect ((expr) != 0, 0)
… …
262 401
263typedef ev_watcher *W; 402typedef ev_watcher *W;
264typedef ev_watcher_list *WL; 403typedef ev_watcher_list *WL;
265typedef ev_watcher_time *WT; 404typedef ev_watcher_time *WT;
266 405
406#define ev_active(w) ((W)(w))->active
407#define ev_at(w) ((WT)(w))->at
408
409#if EV_USE_REALTIME
410/* sig_atomic_t is used to avoid per-thread variables or locking but still */
411/* giving it a reasonably high chance of working on typical architetcures */
412static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
413#endif
414
415#if EV_USE_MONOTONIC
267static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 416static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
417#endif
268 418
269#ifdef _WIN32 419#ifdef _WIN32
270# include "ev_win32.c" 420# include "ev_win32.c"
271#endif 421#endif
272 422
… …
279{ 429{
280 syserr_cb = cb; 430 syserr_cb = cb;
281} 431}
282 432
283static void noinline 433static void noinline
284syserr (const char *msg) 434ev_syserr (const char *msg)
285{ 435{
286 if (!msg) 436 if (!msg)
287 msg = "(libev) system error"; 437 msg = "(libev) system error";
288 438
289 if (syserr_cb) 439 if (syserr_cb)
… …
293 perror (msg); 443 perror (msg);
294 abort (); 444 abort ();
295 } 445 }
296} 446}
297 447
448static void *
449ev_realloc_emul (void *ptr, long size)
450{
451 /* some systems, notably openbsd and darwin, fail to properly
452 * implement realloc (x, 0) (as required by both ansi c-98 and
453 * the single unix specification, so work around them here.
454 */
455
456 if (size)
457 return realloc (ptr, size);
458
459 free (ptr);
460 return 0;
461}
462
298static void *(*alloc)(void *ptr, long size); 463static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
299 464
300void 465void
301ev_set_allocator (void *(*cb)(void *ptr, long size)) 466ev_set_allocator (void *(*cb)(void *ptr, long size))
302{ 467{
303 alloc = cb; 468 alloc = cb;
304} 469}
305 470
306inline_speed void * 471inline_speed void *
307ev_realloc (void *ptr, long size) 472ev_realloc (void *ptr, long size)
308{ 473{
309 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 474 ptr = alloc (ptr, size);
310 475
311 if (!ptr && size) 476 if (!ptr && size)
312 { 477 {
313 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 478 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
314 abort (); 479 abort ();
… …
320#define ev_malloc(size) ev_realloc (0, (size)) 485#define ev_malloc(size) ev_realloc (0, (size))
321#define ev_free(ptr) ev_realloc ((ptr), 0) 486#define ev_free(ptr) ev_realloc ((ptr), 0)
322 487
323/*****************************************************************************/ 488/*****************************************************************************/
324 489
490/* file descriptor info structure */
325typedef struct 491typedef struct
326{ 492{
327 WL head; 493 WL head;
328 unsigned char events; 494 unsigned char events; /* the events watched for */
495 unsigned char reify; /* flag set when this ANFD needs reification */
496 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
329 unsigned char reify; 497 unsigned char unused;
498#if EV_USE_EPOLL
499 unsigned int egen; /* generation counter to counter epoll bugs */
500#endif
330#if EV_SELECT_IS_WINSOCKET 501#if EV_SELECT_IS_WINSOCKET
331 SOCKET handle; 502 SOCKET handle;
332#endif 503#endif
333} ANFD; 504} ANFD;
334 505
506/* stores the pending event set for a given watcher */
335typedef struct 507typedef struct
336{ 508{
337 W w; 509 W w;
338 int events; 510 int events; /* the pending event set for the given watcher */
339} ANPENDING; 511} ANPENDING;
340 512
341#if EV_USE_INOTIFY 513#if EV_USE_INOTIFY
514/* hash table entry per inotify-id */
342typedef struct 515typedef struct
343{ 516{
344 WL head; 517 WL head;
345} ANFS; 518} ANFS;
519#endif
520
521/* Heap Entry */
522#if EV_HEAP_CACHE_AT
523 /* a heap element */
524 typedef struct {
525 ev_tstamp at;
526 WT w;
527 } ANHE;
528
529 #define ANHE_w(he) (he).w /* access watcher, read-write */
530 #define ANHE_at(he) (he).at /* access cached at, read-only */
531 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
532#else
533 /* a heap element */
534 typedef WT ANHE;
535
536 #define ANHE_w(he) (he)
537 #define ANHE_at(he) (he)->at
538 #define ANHE_at_cache(he)
346#endif 539#endif
347 540
348#if EV_MULTIPLICITY 541#if EV_MULTIPLICITY
349 542
350 struct ev_loop 543 struct ev_loop
… …
371 564
372#endif 565#endif
373 566
374/*****************************************************************************/ 567/*****************************************************************************/
375 568
569#ifndef EV_HAVE_EV_TIME
376ev_tstamp 570ev_tstamp
377ev_time (void) 571ev_time (void)
378{ 572{
379#if EV_USE_REALTIME 573#if EV_USE_REALTIME
574 if (expect_true (have_realtime))
575 {
380 struct timespec ts; 576 struct timespec ts;
381 clock_gettime (CLOCK_REALTIME, &ts); 577 clock_gettime (CLOCK_REALTIME, &ts);
382 return ts.tv_sec + ts.tv_nsec * 1e-9; 578 return ts.tv_sec + ts.tv_nsec * 1e-9;
383#else 579 }
580#endif
581
384 struct timeval tv; 582 struct timeval tv;
385 gettimeofday (&tv, 0); 583 gettimeofday (&tv, 0);
386 return tv.tv_sec + tv.tv_usec * 1e-6; 584 return tv.tv_sec + tv.tv_usec * 1e-6;
387#endif
388} 585}
586#endif
389 587
390ev_tstamp inline_size 588inline_size ev_tstamp
391get_clock (void) 589get_clock (void)
392{ 590{
393#if EV_USE_MONOTONIC 591#if EV_USE_MONOTONIC
394 if (expect_true (have_monotonic)) 592 if (expect_true (have_monotonic))
395 { 593 {
… …
408{ 606{
409 return ev_rt_now; 607 return ev_rt_now;
410} 608}
411#endif 609#endif
412 610
413int inline_size 611void
612ev_sleep (ev_tstamp delay)
613{
614 if (delay > 0.)
615 {
616#if EV_USE_NANOSLEEP
617 struct timespec ts;
618
619 ts.tv_sec = (time_t)delay;
620 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
621
622 nanosleep (&ts, 0);
623#elif defined(_WIN32)
624 Sleep ((unsigned long)(delay * 1e3));
625#else
626 struct timeval tv;
627
628 tv.tv_sec = (time_t)delay;
629 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
630
631 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
632 /* somehting not guaranteed by newer posix versions, but guaranteed */
633 /* by older ones */
634 select (0, 0, 0, 0, &tv);
635#endif
636 }
637}
638
639/*****************************************************************************/
640
641#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
642
643/* find a suitable new size for the given array, */
644/* hopefully by rounding to a ncie-to-malloc size */
645inline_size int
414array_nextsize (int elem, int cur, int cnt) 646array_nextsize (int elem, int cur, int cnt)
415{ 647{
416 int ncur = cur + 1; 648 int ncur = cur + 1;
417 649
418 do 650 do
419 ncur <<= 1; 651 ncur <<= 1;
420 while (cnt > ncur); 652 while (cnt > ncur);
421 653
422 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 654 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
423 if (elem * ncur > 4096) 655 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
424 { 656 {
425 ncur *= elem; 657 ncur *= elem;
426 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 658 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
427 ncur = ncur - sizeof (void *) * 4; 659 ncur = ncur - sizeof (void *) * 4;
428 ncur /= elem; 660 ncur /= elem;
429 } 661 }
430 662
431 return ncur; 663 return ncur;
… …
435array_realloc (int elem, void *base, int *cur, int cnt) 667array_realloc (int elem, void *base, int *cur, int cnt)
436{ 668{
437 *cur = array_nextsize (elem, *cur, cnt); 669 *cur = array_nextsize (elem, *cur, cnt);
438 return ev_realloc (base, elem * *cur); 670 return ev_realloc (base, elem * *cur);
439} 671}
672
673#define array_init_zero(base,count) \
674 memset ((void *)(base), 0, sizeof (*(base)) * (count))
440 675
441#define array_needsize(type,base,cur,cnt,init) \ 676#define array_needsize(type,base,cur,cnt,init) \
442 if (expect_false ((cnt) > (cur))) \ 677 if (expect_false ((cnt) > (cur))) \
443 { \ 678 { \
444 int ocur_ = (cur); \ 679 int ocur_ = (cur); \
… …
456 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 691 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
457 } 692 }
458#endif 693#endif
459 694
460#define array_free(stem, idx) \ 695#define array_free(stem, idx) \
461 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 696 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
462 697
463/*****************************************************************************/ 698/*****************************************************************************/
699
700/* dummy callback for pending events */
701static void noinline
702pendingcb (EV_P_ ev_prepare *w, int revents)
703{
704}
464 705
465void noinline 706void noinline
466ev_feed_event (EV_P_ void *w, int revents) 707ev_feed_event (EV_P_ void *w, int revents)
467{ 708{
468 W w_ = (W)w; 709 W w_ = (W)w;
… …
477 pendings [pri][w_->pending - 1].w = w_; 718 pendings [pri][w_->pending - 1].w = w_;
478 pendings [pri][w_->pending - 1].events = revents; 719 pendings [pri][w_->pending - 1].events = revents;
479 } 720 }
480} 721}
481 722
482void inline_speed 723inline_speed void
724feed_reverse (EV_P_ W w)
725{
726 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
727 rfeeds [rfeedcnt++] = w;
728}
729
730inline_size void
731feed_reverse_done (EV_P_ int revents)
732{
733 do
734 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
735 while (rfeedcnt);
736}
737
738inline_speed void
483queue_events (EV_P_ W *events, int eventcnt, int type) 739queue_events (EV_P_ W *events, int eventcnt, int type)
484{ 740{
485 int i; 741 int i;
486 742
487 for (i = 0; i < eventcnt; ++i) 743 for (i = 0; i < eventcnt; ++i)
488 ev_feed_event (EV_A_ events [i], type); 744 ev_feed_event (EV_A_ events [i], type);
489} 745}
490 746
491/*****************************************************************************/ 747/*****************************************************************************/
492 748
493void inline_size 749inline_speed void
494anfds_init (ANFD *base, int count)
495{
496 while (count--)
497 {
498 base->head = 0;
499 base->events = EV_NONE;
500 base->reify = 0;
501
502 ++base;
503 }
504}
505
506void inline_speed
507fd_event (EV_P_ int fd, int revents) 750fd_event (EV_P_ int fd, int revents)
508{ 751{
509 ANFD *anfd = anfds + fd; 752 ANFD *anfd = anfds + fd;
510 ev_io *w; 753 ev_io *w;
511 754
… …
523{ 766{
524 if (fd >= 0 && fd < anfdmax) 767 if (fd >= 0 && fd < anfdmax)
525 fd_event (EV_A_ fd, revents); 768 fd_event (EV_A_ fd, revents);
526} 769}
527 770
528void inline_size 771/* make sure the external fd watch events are in-sync */
772/* with the kernel/libev internal state */
773inline_size void
529fd_reify (EV_P) 774fd_reify (EV_P)
530{ 775{
531 int i; 776 int i;
532 777
533 for (i = 0; i < fdchangecnt; ++i) 778 for (i = 0; i < fdchangecnt; ++i)
… …
542 events |= (unsigned char)w->events; 787 events |= (unsigned char)w->events;
543 788
544#if EV_SELECT_IS_WINSOCKET 789#if EV_SELECT_IS_WINSOCKET
545 if (events) 790 if (events)
546 { 791 {
547 unsigned long argp; 792 unsigned long arg;
793 #ifdef EV_FD_TO_WIN32_HANDLE
794 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
795 #else
548 anfd->handle = _get_osfhandle (fd); 796 anfd->handle = _get_osfhandle (fd);
797 #endif
549 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 798 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
550 } 799 }
551#endif 800#endif
552 801
553 { 802 {
554 unsigned char o_events = anfd->events; 803 unsigned char o_events = anfd->events;
555 unsigned char o_reify = anfd->reify; 804 unsigned char o_reify = anfd->reify;
556 805
557 anfd->reify = 0; 806 anfd->reify = 0;
558 anfd->events = events; 807 anfd->events = events;
559 808
560 if (o_events != events || o_reify & EV_IOFDSET) 809 if (o_events != events || o_reify & EV__IOFDSET)
561 backend_modify (EV_A_ fd, o_events, events); 810 backend_modify (EV_A_ fd, o_events, events);
562 } 811 }
563 } 812 }
564 813
565 fdchangecnt = 0; 814 fdchangecnt = 0;
566} 815}
567 816
568void inline_size 817/* something about the given fd changed */
818inline_size void
569fd_change (EV_P_ int fd, int flags) 819fd_change (EV_P_ int fd, int flags)
570{ 820{
571 unsigned char reify = anfds [fd].reify; 821 unsigned char reify = anfds [fd].reify;
572 anfds [fd].reify |= flags; 822 anfds [fd].reify |= flags;
573 823
… …
577 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 827 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
578 fdchanges [fdchangecnt - 1] = fd; 828 fdchanges [fdchangecnt - 1] = fd;
579 } 829 }
580} 830}
581 831
582void inline_speed 832/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
833inline_speed void
583fd_kill (EV_P_ int fd) 834fd_kill (EV_P_ int fd)
584{ 835{
585 ev_io *w; 836 ev_io *w;
586 837
587 while ((w = (ev_io *)anfds [fd].head)) 838 while ((w = (ev_io *)anfds [fd].head))
… …
589 ev_io_stop (EV_A_ w); 840 ev_io_stop (EV_A_ w);
590 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 841 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
591 } 842 }
592} 843}
593 844
594int inline_size 845/* check whether the given fd is atcually valid, for error recovery */
846inline_size int
595fd_valid (int fd) 847fd_valid (int fd)
596{ 848{
597#ifdef _WIN32 849#ifdef _WIN32
598 return _get_osfhandle (fd) != -1; 850 return _get_osfhandle (fd) != -1;
599#else 851#else
… …
607{ 859{
608 int fd; 860 int fd;
609 861
610 for (fd = 0; fd < anfdmax; ++fd) 862 for (fd = 0; fd < anfdmax; ++fd)
611 if (anfds [fd].events) 863 if (anfds [fd].events)
612 if (!fd_valid (fd) == -1 && errno == EBADF) 864 if (!fd_valid (fd) && errno == EBADF)
613 fd_kill (EV_A_ fd); 865 fd_kill (EV_A_ fd);
614} 866}
615 867
616/* called on ENOMEM in select/poll to kill some fds and retry */ 868/* called on ENOMEM in select/poll to kill some fds and retry */
617static void noinline 869static void noinline
… …
635 887
636 for (fd = 0; fd < anfdmax; ++fd) 888 for (fd = 0; fd < anfdmax; ++fd)
637 if (anfds [fd].events) 889 if (anfds [fd].events)
638 { 890 {
639 anfds [fd].events = 0; 891 anfds [fd].events = 0;
892 anfds [fd].emask = 0;
640 fd_change (EV_A_ fd, EV_IOFDSET | 1); 893 fd_change (EV_A_ fd, EV__IOFDSET | 1);
641 } 894 }
642} 895}
643 896
644/*****************************************************************************/ 897/*****************************************************************************/
645 898
646void inline_speed 899/*
647upheap (WT *heap, int k) 900 * the heap functions want a real array index. array index 0 uis guaranteed to not
648{ 901 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
649 WT w = heap [k]; 902 * the branching factor of the d-tree.
903 */
650 904
651 while (k) 905/*
652 { 906 * at the moment we allow libev the luxury of two heaps,
653 int p = (k - 1) >> 1; 907 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
908 * which is more cache-efficient.
909 * the difference is about 5% with 50000+ watchers.
910 */
911#if EV_USE_4HEAP
654 912
655 if (heap [p]->at <= w->at) 913#define DHEAP 4
914#define HEAP0 (DHEAP - 1) /* index of first element in heap */
915#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
916#define UPHEAP_DONE(p,k) ((p) == (k))
917
918/* away from the root */
919inline_speed void
920downheap (ANHE *heap, int N, int k)
921{
922 ANHE he = heap [k];
923 ANHE *E = heap + N + HEAP0;
924
925 for (;;)
926 {
927 ev_tstamp minat;
928 ANHE *minpos;
929 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
930
931 /* find minimum child */
932 if (expect_true (pos + DHEAP - 1 < E))
933 {
934 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
935 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
936 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
937 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
938 }
939 else if (pos < E)
940 {
941 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
942 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
943 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
944 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
945 }
946 else
656 break; 947 break;
657 948
949 if (ANHE_at (he) <= minat)
950 break;
951
952 heap [k] = *minpos;
953 ev_active (ANHE_w (*minpos)) = k;
954
955 k = minpos - heap;
956 }
957
958 heap [k] = he;
959 ev_active (ANHE_w (he)) = k;
960}
961
962#else /* 4HEAP */
963
964#define HEAP0 1
965#define HPARENT(k) ((k) >> 1)
966#define UPHEAP_DONE(p,k) (!(p))
967
968/* away from the root */
969inline_speed void
970downheap (ANHE *heap, int N, int k)
971{
972 ANHE he = heap [k];
973
974 for (;;)
975 {
976 int c = k << 1;
977
978 if (c > N + HEAP0 - 1)
979 break;
980
981 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
982 ? 1 : 0;
983
984 if (ANHE_at (he) <= ANHE_at (heap [c]))
985 break;
986
987 heap [k] = heap [c];
988 ev_active (ANHE_w (heap [k])) = k;
989
990 k = c;
991 }
992
993 heap [k] = he;
994 ev_active (ANHE_w (he)) = k;
995}
996#endif
997
998/* towards the root */
999inline_speed void
1000upheap (ANHE *heap, int k)
1001{
1002 ANHE he = heap [k];
1003
1004 for (;;)
1005 {
1006 int p = HPARENT (k);
1007
1008 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1009 break;
1010
658 heap [k] = heap [p]; 1011 heap [k] = heap [p];
659 ((W)heap [k])->active = k + 1; 1012 ev_active (ANHE_w (heap [k])) = k;
660 k = p; 1013 k = p;
661 } 1014 }
662 1015
663 heap [k] = w; 1016 heap [k] = he;
664 ((W)heap [k])->active = k + 1; 1017 ev_active (ANHE_w (he)) = k;
665} 1018}
666 1019
667void inline_speed 1020/* move an element suitably so it is in a correct place */
668downheap (WT *heap, int N, int k) 1021inline_size void
669{
670 WT w = heap [k];
671
672 for (;;)
673 {
674 int c = (k << 1) + 1;
675
676 if (c >= N)
677 break;
678
679 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
680 ? 1 : 0;
681
682 if (w->at <= heap [c]->at)
683 break;
684
685 heap [k] = heap [c];
686 ((W)heap [k])->active = k + 1;
687
688 k = c;
689 }
690
691 heap [k] = w;
692 ((W)heap [k])->active = k + 1;
693}
694
695void inline_size
696adjustheap (WT *heap, int N, int k) 1022adjustheap (ANHE *heap, int N, int k)
697{ 1023{
1024 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
698 upheap (heap, k); 1025 upheap (heap, k);
1026 else
699 downheap (heap, N, k); 1027 downheap (heap, N, k);
1028}
1029
1030/* rebuild the heap: this function is used only once and executed rarely */
1031inline_size void
1032reheap (ANHE *heap, int N)
1033{
1034 int i;
1035
1036 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1037 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1038 for (i = 0; i < N; ++i)
1039 upheap (heap, i + HEAP0);
700} 1040}
701 1041
702/*****************************************************************************/ 1042/*****************************************************************************/
703 1043
1044/* associate signal watchers to a signal signal */
704typedef struct 1045typedef struct
705{ 1046{
706 WL head; 1047 WL head;
707 sig_atomic_t volatile gotsig; 1048 EV_ATOMIC_T gotsig;
708} ANSIG; 1049} ANSIG;
709 1050
710static ANSIG *signals; 1051static ANSIG *signals;
711static int signalmax; 1052static int signalmax;
712 1053
713static int sigpipe [2]; 1054static EV_ATOMIC_T gotsig;
714static sig_atomic_t volatile gotsig;
715static ev_io sigev;
716 1055
717void inline_size 1056/*****************************************************************************/
718signals_init (ANSIG *base, int count)
719{
720 while (count--)
721 {
722 base->head = 0;
723 base->gotsig = 0;
724 1057
725 ++base; 1058/* used to prepare libev internal fd's */
726 } 1059/* this is not fork-safe */
727} 1060inline_speed void
728
729static void
730sighandler (int signum)
731{
732#if _WIN32
733 signal (signum, sighandler);
734#endif
735
736 signals [signum - 1].gotsig = 1;
737
738 if (!gotsig)
739 {
740 int old_errno = errno;
741 gotsig = 1;
742 write (sigpipe [1], &signum, 1);
743 errno = old_errno;
744 }
745}
746
747void noinline
748ev_feed_signal_event (EV_P_ int signum)
749{
750 WL w;
751
752#if EV_MULTIPLICITY
753 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
754#endif
755
756 --signum;
757
758 if (signum < 0 || signum >= signalmax)
759 return;
760
761 signals [signum].gotsig = 0;
762
763 for (w = signals [signum].head; w; w = w->next)
764 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
765}
766
767static void
768sigcb (EV_P_ ev_io *iow, int revents)
769{
770 int signum;
771
772 read (sigpipe [0], &revents, 1);
773 gotsig = 0;
774
775 for (signum = signalmax; signum--; )
776 if (signals [signum].gotsig)
777 ev_feed_signal_event (EV_A_ signum + 1);
778}
779
780void inline_speed
781fd_intern (int fd) 1061fd_intern (int fd)
782{ 1062{
783#ifdef _WIN32 1063#ifdef _WIN32
784 int arg = 1; 1064 unsigned long arg = 1;
785 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1065 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
786#else 1066#else
787 fcntl (fd, F_SETFD, FD_CLOEXEC); 1067 fcntl (fd, F_SETFD, FD_CLOEXEC);
788 fcntl (fd, F_SETFL, O_NONBLOCK); 1068 fcntl (fd, F_SETFL, O_NONBLOCK);
789#endif 1069#endif
790} 1070}
791 1071
792static void noinline 1072static void noinline
793siginit (EV_P) 1073evpipe_init (EV_P)
794{ 1074{
1075 if (!ev_is_active (&pipe_w))
1076 {
1077#if EV_USE_EVENTFD
1078 if ((evfd = eventfd (0, 0)) >= 0)
1079 {
1080 evpipe [0] = -1;
1081 fd_intern (evfd);
1082 ev_io_set (&pipe_w, evfd, EV_READ);
1083 }
1084 else
1085#endif
1086 {
1087 while (pipe (evpipe))
1088 ev_syserr ("(libev) error creating signal/async pipe");
1089
795 fd_intern (sigpipe [0]); 1090 fd_intern (evpipe [0]);
796 fd_intern (sigpipe [1]); 1091 fd_intern (evpipe [1]);
1092 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1093 }
797 1094
798 ev_io_set (&sigev, sigpipe [0], EV_READ);
799 ev_io_start (EV_A_ &sigev); 1095 ev_io_start (EV_A_ &pipe_w);
800 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1096 ev_unref (EV_A); /* watcher should not keep loop alive */
1097 }
1098}
1099
1100inline_size void
1101evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1102{
1103 if (!*flag)
1104 {
1105 int old_errno = errno; /* save errno because write might clobber it */
1106
1107 *flag = 1;
1108
1109#if EV_USE_EVENTFD
1110 if (evfd >= 0)
1111 {
1112 uint64_t counter = 1;
1113 write (evfd, &counter, sizeof (uint64_t));
1114 }
1115 else
1116#endif
1117 write (evpipe [1], &old_errno, 1);
1118
1119 errno = old_errno;
1120 }
1121}
1122
1123/* called whenever the libev signal pipe */
1124/* got some events (signal, async) */
1125static void
1126pipecb (EV_P_ ev_io *iow, int revents)
1127{
1128#if EV_USE_EVENTFD
1129 if (evfd >= 0)
1130 {
1131 uint64_t counter;
1132 read (evfd, &counter, sizeof (uint64_t));
1133 }
1134 else
1135#endif
1136 {
1137 char dummy;
1138 read (evpipe [0], &dummy, 1);
1139 }
1140
1141 if (gotsig && ev_is_default_loop (EV_A))
1142 {
1143 int signum;
1144 gotsig = 0;
1145
1146 for (signum = signalmax; signum--; )
1147 if (signals [signum].gotsig)
1148 ev_feed_signal_event (EV_A_ signum + 1);
1149 }
1150
1151#if EV_ASYNC_ENABLE
1152 if (gotasync)
1153 {
1154 int i;
1155 gotasync = 0;
1156
1157 for (i = asynccnt; i--; )
1158 if (asyncs [i]->sent)
1159 {
1160 asyncs [i]->sent = 0;
1161 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1162 }
1163 }
1164#endif
801} 1165}
802 1166
803/*****************************************************************************/ 1167/*****************************************************************************/
804 1168
1169static void
1170ev_sighandler (int signum)
1171{
1172#if EV_MULTIPLICITY
1173 struct ev_loop *loop = &default_loop_struct;
1174#endif
1175
1176#if _WIN32
1177 signal (signum, ev_sighandler);
1178#endif
1179
1180 signals [signum - 1].gotsig = 1;
1181 evpipe_write (EV_A_ &gotsig);
1182}
1183
1184void noinline
1185ev_feed_signal_event (EV_P_ int signum)
1186{
1187 WL w;
1188
1189#if EV_MULTIPLICITY
1190 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1191#endif
1192
1193 --signum;
1194
1195 if (signum < 0 || signum >= signalmax)
1196 return;
1197
1198 signals [signum].gotsig = 0;
1199
1200 for (w = signals [signum].head; w; w = w->next)
1201 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1202}
1203
1204/*****************************************************************************/
1205
805static WL childs [EV_PID_HASHSIZE]; 1206static WL childs [EV_PID_HASHSIZE];
806 1207
807#ifndef _WIN32 1208#ifndef _WIN32
808 1209
809static ev_signal childev; 1210static ev_signal childev;
810 1211
811void inline_speed 1212#ifndef WIFCONTINUED
1213# define WIFCONTINUED(status) 0
1214#endif
1215
1216/* handle a single child status event */
1217inline_speed void
812child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 1218child_reap (EV_P_ int chain, int pid, int status)
813{ 1219{
814 ev_child *w; 1220 ev_child *w;
1221 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
815 1222
816 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1223 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1224 {
817 if (w->pid == pid || !w->pid) 1225 if ((w->pid == pid || !w->pid)
1226 && (!traced || (w->flags & 1)))
818 { 1227 {
819 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 1228 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
820 w->rpid = pid; 1229 w->rpid = pid;
821 w->rstatus = status; 1230 w->rstatus = status;
822 ev_feed_event (EV_A_ (W)w, EV_CHILD); 1231 ev_feed_event (EV_A_ (W)w, EV_CHILD);
823 } 1232 }
1233 }
824} 1234}
825 1235
826#ifndef WCONTINUED 1236#ifndef WCONTINUED
827# define WCONTINUED 0 1237# define WCONTINUED 0
828#endif 1238#endif
829 1239
1240/* called on sigchld etc., calls waitpid */
830static void 1241static void
831childcb (EV_P_ ev_signal *sw, int revents) 1242childcb (EV_P_ ev_signal *sw, int revents)
832{ 1243{
833 int pid, status; 1244 int pid, status;
834 1245
… …
837 if (!WCONTINUED 1248 if (!WCONTINUED
838 || errno != EINVAL 1249 || errno != EINVAL
839 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 1250 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
840 return; 1251 return;
841 1252
842 /* make sure we are called again until all childs have been reaped */ 1253 /* make sure we are called again until all children have been reaped */
843 /* we need to do it this way so that the callback gets called before we continue */ 1254 /* we need to do it this way so that the callback gets called before we continue */
844 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1255 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
845 1256
846 child_reap (EV_A_ sw, pid, pid, status); 1257 child_reap (EV_A_ pid, pid, status);
847 if (EV_PID_HASHSIZE > 1) 1258 if (EV_PID_HASHSIZE > 1)
848 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1259 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
849} 1260}
850 1261
851#endif 1262#endif
852 1263
853/*****************************************************************************/ 1264/*****************************************************************************/
… …
915 /* kqueue is borked on everything but netbsd apparently */ 1326 /* kqueue is borked on everything but netbsd apparently */
916 /* it usually doesn't work correctly on anything but sockets and pipes */ 1327 /* it usually doesn't work correctly on anything but sockets and pipes */
917 flags &= ~EVBACKEND_KQUEUE; 1328 flags &= ~EVBACKEND_KQUEUE;
918#endif 1329#endif
919#ifdef __APPLE__ 1330#ifdef __APPLE__
920 // flags &= ~EVBACKEND_KQUEUE; for documentation 1331 /* only select works correctly on that "unix-certified" platform */
921 flags &= ~EVBACKEND_POLL; 1332 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1333 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
922#endif 1334#endif
923 1335
924 return flags; 1336 return flags;
925} 1337}
926 1338
927unsigned int 1339unsigned int
928ev_embeddable_backends (void) 1340ev_embeddable_backends (void)
929{ 1341{
930 return EVBACKEND_EPOLL 1342 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
931 | EVBACKEND_KQUEUE 1343
932 | EVBACKEND_PORT; 1344 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1345 /* please fix it and tell me how to detect the fix */
1346 flags &= ~EVBACKEND_EPOLL;
1347
1348 return flags;
933} 1349}
934 1350
935unsigned int 1351unsigned int
936ev_backend (EV_P) 1352ev_backend (EV_P)
937{ 1353{
… …
942ev_loop_count (EV_P) 1358ev_loop_count (EV_P)
943{ 1359{
944 return loop_count; 1360 return loop_count;
945} 1361}
946 1362
1363void
1364ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1365{
1366 io_blocktime = interval;
1367}
1368
1369void
1370ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1371{
1372 timeout_blocktime = interval;
1373}
1374
1375/* initialise a loop structure, must be zero-initialised */
947static void noinline 1376static void noinline
948loop_init (EV_P_ unsigned int flags) 1377loop_init (EV_P_ unsigned int flags)
949{ 1378{
950 if (!backend) 1379 if (!backend)
951 { 1380 {
1381#if EV_USE_REALTIME
1382 if (!have_realtime)
1383 {
1384 struct timespec ts;
1385
1386 if (!clock_gettime (CLOCK_REALTIME, &ts))
1387 have_realtime = 1;
1388 }
1389#endif
1390
952#if EV_USE_MONOTONIC 1391#if EV_USE_MONOTONIC
1392 if (!have_monotonic)
953 { 1393 {
954 struct timespec ts; 1394 struct timespec ts;
1395
955 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1396 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
956 have_monotonic = 1; 1397 have_monotonic = 1;
957 } 1398 }
958#endif 1399#endif
959 1400
960 ev_rt_now = ev_time (); 1401 ev_rt_now = ev_time ();
961 mn_now = get_clock (); 1402 mn_now = get_clock ();
962 now_floor = mn_now; 1403 now_floor = mn_now;
963 rtmn_diff = ev_rt_now - mn_now; 1404 rtmn_diff = ev_rt_now - mn_now;
1405
1406 io_blocktime = 0.;
1407 timeout_blocktime = 0.;
1408 backend = 0;
1409 backend_fd = -1;
1410 gotasync = 0;
1411#if EV_USE_INOTIFY
1412 fs_fd = -2;
1413#endif
964 1414
965 /* pid check not overridable via env */ 1415 /* pid check not overridable via env */
966#ifndef _WIN32 1416#ifndef _WIN32
967 if (flags & EVFLAG_FORKCHECK) 1417 if (flags & EVFLAG_FORKCHECK)
968 curpid = getpid (); 1418 curpid = getpid ();
… …
971 if (!(flags & EVFLAG_NOENV) 1421 if (!(flags & EVFLAG_NOENV)
972 && !enable_secure () 1422 && !enable_secure ()
973 && getenv ("LIBEV_FLAGS")) 1423 && getenv ("LIBEV_FLAGS"))
974 flags = atoi (getenv ("LIBEV_FLAGS")); 1424 flags = atoi (getenv ("LIBEV_FLAGS"));
975 1425
976 if (!(flags & 0x0000ffffUL)) 1426 if (!(flags & 0x0000ffffU))
977 flags |= ev_recommended_backends (); 1427 flags |= ev_recommended_backends ();
978
979 backend = 0;
980 backend_fd = -1;
981#if EV_USE_INOTIFY
982 fs_fd = -2;
983#endif
984 1428
985#if EV_USE_PORT 1429#if EV_USE_PORT
986 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1430 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
987#endif 1431#endif
988#if EV_USE_KQUEUE 1432#if EV_USE_KQUEUE
… …
996#endif 1440#endif
997#if EV_USE_SELECT 1441#if EV_USE_SELECT
998 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1442 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
999#endif 1443#endif
1000 1444
1445 ev_prepare_init (&pending_w, pendingcb);
1446
1001 ev_init (&sigev, sigcb); 1447 ev_init (&pipe_w, pipecb);
1002 ev_set_priority (&sigev, EV_MAXPRI); 1448 ev_set_priority (&pipe_w, EV_MAXPRI);
1003 } 1449 }
1004} 1450}
1005 1451
1452/* free up a loop structure */
1006static void noinline 1453static void noinline
1007loop_destroy (EV_P) 1454loop_destroy (EV_P)
1008{ 1455{
1009 int i; 1456 int i;
1457
1458 if (ev_is_active (&pipe_w))
1459 {
1460 ev_ref (EV_A); /* signal watcher */
1461 ev_io_stop (EV_A_ &pipe_w);
1462
1463#if EV_USE_EVENTFD
1464 if (evfd >= 0)
1465 close (evfd);
1466#endif
1467
1468 if (evpipe [0] >= 0)
1469 {
1470 close (evpipe [0]);
1471 close (evpipe [1]);
1472 }
1473 }
1010 1474
1011#if EV_USE_INOTIFY 1475#if EV_USE_INOTIFY
1012 if (fs_fd >= 0) 1476 if (fs_fd >= 0)
1013 close (fs_fd); 1477 close (fs_fd);
1014#endif 1478#endif
… …
1041 } 1505 }
1042 1506
1043 ev_free (anfds); anfdmax = 0; 1507 ev_free (anfds); anfdmax = 0;
1044 1508
1045 /* have to use the microsoft-never-gets-it-right macro */ 1509 /* have to use the microsoft-never-gets-it-right macro */
1510 array_free (rfeed, EMPTY);
1046 array_free (fdchange, EMPTY); 1511 array_free (fdchange, EMPTY);
1047 array_free (timer, EMPTY); 1512 array_free (timer, EMPTY);
1048#if EV_PERIODIC_ENABLE 1513#if EV_PERIODIC_ENABLE
1049 array_free (periodic, EMPTY); 1514 array_free (periodic, EMPTY);
1050#endif 1515#endif
1516#if EV_FORK_ENABLE
1517 array_free (fork, EMPTY);
1518#endif
1051 array_free (prepare, EMPTY); 1519 array_free (prepare, EMPTY);
1052 array_free (check, EMPTY); 1520 array_free (check, EMPTY);
1521#if EV_ASYNC_ENABLE
1053 array_free (fork, EMPTY); 1522 array_free (async, EMPTY);
1523#endif
1054 1524
1055 backend = 0; 1525 backend = 0;
1056} 1526}
1057 1527
1528#if EV_USE_INOTIFY
1058void inline_size infy_fork (EV_P); 1529inline_size void infy_fork (EV_P);
1530#endif
1059 1531
1060void inline_size 1532inline_size void
1061loop_fork (EV_P) 1533loop_fork (EV_P)
1062{ 1534{
1063#if EV_USE_PORT 1535#if EV_USE_PORT
1064 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 1536 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1065#endif 1537#endif
… …
1071#endif 1543#endif
1072#if EV_USE_INOTIFY 1544#if EV_USE_INOTIFY
1073 infy_fork (EV_A); 1545 infy_fork (EV_A);
1074#endif 1546#endif
1075 1547
1076 if (ev_is_active (&sigev)) 1548 if (ev_is_active (&pipe_w))
1077 { 1549 {
1078 /* default loop */ 1550 /* this "locks" the handlers against writing to the pipe */
1551 /* while we modify the fd vars */
1552 gotsig = 1;
1553#if EV_ASYNC_ENABLE
1554 gotasync = 1;
1555#endif
1079 1556
1080 ev_ref (EV_A); 1557 ev_ref (EV_A);
1081 ev_io_stop (EV_A_ &sigev); 1558 ev_io_stop (EV_A_ &pipe_w);
1559
1560#if EV_USE_EVENTFD
1561 if (evfd >= 0)
1562 close (evfd);
1563#endif
1564
1565 if (evpipe [0] >= 0)
1566 {
1082 close (sigpipe [0]); 1567 close (evpipe [0]);
1083 close (sigpipe [1]); 1568 close (evpipe [1]);
1569 }
1084 1570
1085 while (pipe (sigpipe))
1086 syserr ("(libev) error creating pipe");
1087
1088 siginit (EV_A); 1571 evpipe_init (EV_A);
1572 /* now iterate over everything, in case we missed something */
1573 pipecb (EV_A_ &pipe_w, EV_READ);
1089 } 1574 }
1090 1575
1091 postfork = 0; 1576 postfork = 0;
1092} 1577}
1093 1578
1094#if EV_MULTIPLICITY 1579#if EV_MULTIPLICITY
1580
1095struct ev_loop * 1581struct ev_loop *
1096ev_loop_new (unsigned int flags) 1582ev_loop_new (unsigned int flags)
1097{ 1583{
1098 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 1584 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1099 1585
… …
1115} 1601}
1116 1602
1117void 1603void
1118ev_loop_fork (EV_P) 1604ev_loop_fork (EV_P)
1119{ 1605{
1120 postfork = 1; 1606 postfork = 1; /* must be in line with ev_default_fork */
1121} 1607}
1122 1608
1609#if EV_VERIFY
1610static void noinline
1611verify_watcher (EV_P_ W w)
1612{
1613 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1614
1615 if (w->pending)
1616 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1617}
1618
1619static void noinline
1620verify_heap (EV_P_ ANHE *heap, int N)
1621{
1622 int i;
1623
1624 for (i = HEAP0; i < N + HEAP0; ++i)
1625 {
1626 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1627 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1628 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1629
1630 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1631 }
1632}
1633
1634static void noinline
1635array_verify (EV_P_ W *ws, int cnt)
1636{
1637 while (cnt--)
1638 {
1639 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1640 verify_watcher (EV_A_ ws [cnt]);
1641 }
1642}
1643#endif
1644
1645void
1646ev_loop_verify (EV_P)
1647{
1648#if EV_VERIFY
1649 int i;
1650 WL w;
1651
1652 assert (activecnt >= -1);
1653
1654 assert (fdchangemax >= fdchangecnt);
1655 for (i = 0; i < fdchangecnt; ++i)
1656 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1657
1658 assert (anfdmax >= 0);
1659 for (i = 0; i < anfdmax; ++i)
1660 for (w = anfds [i].head; w; w = w->next)
1661 {
1662 verify_watcher (EV_A_ (W)w);
1663 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1664 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1665 }
1666
1667 assert (timermax >= timercnt);
1668 verify_heap (EV_A_ timers, timercnt);
1669
1670#if EV_PERIODIC_ENABLE
1671 assert (periodicmax >= periodiccnt);
1672 verify_heap (EV_A_ periodics, periodiccnt);
1673#endif
1674
1675 for (i = NUMPRI; i--; )
1676 {
1677 assert (pendingmax [i] >= pendingcnt [i]);
1678#if EV_IDLE_ENABLE
1679 assert (idleall >= 0);
1680 assert (idlemax [i] >= idlecnt [i]);
1681 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1682#endif
1683 }
1684
1685#if EV_FORK_ENABLE
1686 assert (forkmax >= forkcnt);
1687 array_verify (EV_A_ (W *)forks, forkcnt);
1688#endif
1689
1690#if EV_ASYNC_ENABLE
1691 assert (asyncmax >= asynccnt);
1692 array_verify (EV_A_ (W *)asyncs, asynccnt);
1693#endif
1694
1695 assert (preparemax >= preparecnt);
1696 array_verify (EV_A_ (W *)prepares, preparecnt);
1697
1698 assert (checkmax >= checkcnt);
1699 array_verify (EV_A_ (W *)checks, checkcnt);
1700
1701# if 0
1702 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1703 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1123#endif 1704# endif
1705#endif
1706}
1707
1708#endif /* multiplicity */
1124 1709
1125#if EV_MULTIPLICITY 1710#if EV_MULTIPLICITY
1126struct ev_loop * 1711struct ev_loop *
1127ev_default_loop_init (unsigned int flags) 1712ev_default_loop_init (unsigned int flags)
1128#else 1713#else
1129int 1714int
1130ev_default_loop (unsigned int flags) 1715ev_default_loop (unsigned int flags)
1131#endif 1716#endif
1132{ 1717{
1133 if (sigpipe [0] == sigpipe [1])
1134 if (pipe (sigpipe))
1135 return 0;
1136
1137 if (!ev_default_loop_ptr) 1718 if (!ev_default_loop_ptr)
1138 { 1719 {
1139#if EV_MULTIPLICITY 1720#if EV_MULTIPLICITY
1140 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1721 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1141#else 1722#else
… …
1144 1725
1145 loop_init (EV_A_ flags); 1726 loop_init (EV_A_ flags);
1146 1727
1147 if (ev_backend (EV_A)) 1728 if (ev_backend (EV_A))
1148 { 1729 {
1149 siginit (EV_A);
1150
1151#ifndef _WIN32 1730#ifndef _WIN32
1152 ev_signal_init (&childev, childcb, SIGCHLD); 1731 ev_signal_init (&childev, childcb, SIGCHLD);
1153 ev_set_priority (&childev, EV_MAXPRI); 1732 ev_set_priority (&childev, EV_MAXPRI);
1154 ev_signal_start (EV_A_ &childev); 1733 ev_signal_start (EV_A_ &childev);
1155 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1734 ev_unref (EV_A); /* child watcher should not keep loop alive */
… …
1167{ 1746{
1168#if EV_MULTIPLICITY 1747#if EV_MULTIPLICITY
1169 struct ev_loop *loop = ev_default_loop_ptr; 1748 struct ev_loop *loop = ev_default_loop_ptr;
1170#endif 1749#endif
1171 1750
1751 ev_default_loop_ptr = 0;
1752
1172#ifndef _WIN32 1753#ifndef _WIN32
1173 ev_ref (EV_A); /* child watcher */ 1754 ev_ref (EV_A); /* child watcher */
1174 ev_signal_stop (EV_A_ &childev); 1755 ev_signal_stop (EV_A_ &childev);
1175#endif 1756#endif
1176 1757
1177 ev_ref (EV_A); /* signal watcher */
1178 ev_io_stop (EV_A_ &sigev);
1179
1180 close (sigpipe [0]); sigpipe [0] = 0;
1181 close (sigpipe [1]); sigpipe [1] = 0;
1182
1183 loop_destroy (EV_A); 1758 loop_destroy (EV_A);
1184} 1759}
1185 1760
1186void 1761void
1187ev_default_fork (void) 1762ev_default_fork (void)
1188{ 1763{
1189#if EV_MULTIPLICITY 1764#if EV_MULTIPLICITY
1190 struct ev_loop *loop = ev_default_loop_ptr; 1765 struct ev_loop *loop = ev_default_loop_ptr;
1191#endif 1766#endif
1192 1767
1193 if (backend) 1768 postfork = 1; /* must be in line with ev_loop_fork */
1194 postfork = 1;
1195} 1769}
1196 1770
1197/*****************************************************************************/ 1771/*****************************************************************************/
1198 1772
1199void 1773void
1200ev_invoke (EV_P_ void *w, int revents) 1774ev_invoke (EV_P_ void *w, int revents)
1201{ 1775{
1202 EV_CB_INVOKE ((W)w, revents); 1776 EV_CB_INVOKE ((W)w, revents);
1203} 1777}
1204 1778
1205void inline_speed 1779inline_speed void
1206call_pending (EV_P) 1780call_pending (EV_P)
1207{ 1781{
1208 int pri; 1782 int pri;
1209 1783
1210 for (pri = NUMPRI; pri--; ) 1784 for (pri = NUMPRI; pri--; )
1211 while (pendingcnt [pri]) 1785 while (pendingcnt [pri])
1212 { 1786 {
1213 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1787 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1214 1788
1215 if (expect_true (p->w))
1216 {
1217 /*assert (("non-pending watcher on pending list", p->w->pending));*/ 1789 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1790 /* ^ this is no longer true, as pending_w could be here */
1218 1791
1219 p->w->pending = 0; 1792 p->w->pending = 0;
1220 EV_CB_INVOKE (p->w, p->events); 1793 EV_CB_INVOKE (p->w, p->events);
1221 } 1794 EV_FREQUENT_CHECK;
1222 } 1795 }
1223} 1796}
1224 1797
1225void inline_size
1226timers_reify (EV_P)
1227{
1228 while (timercnt && ((WT)timers [0])->at <= mn_now)
1229 {
1230 ev_timer *w = (ev_timer *)timers [0];
1231
1232 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1233
1234 /* first reschedule or stop timer */
1235 if (w->repeat)
1236 {
1237 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1238
1239 ((WT)w)->at += w->repeat;
1240 if (((WT)w)->at < mn_now)
1241 ((WT)w)->at = mn_now;
1242
1243 downheap (timers, timercnt, 0);
1244 }
1245 else
1246 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1247
1248 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1249 }
1250}
1251
1252#if EV_PERIODIC_ENABLE
1253void inline_size
1254periodics_reify (EV_P)
1255{
1256 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1257 {
1258 ev_periodic *w = (ev_periodic *)periodics [0];
1259
1260 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1261
1262 /* first reschedule or stop timer */
1263 if (w->reschedule_cb)
1264 {
1265 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1266 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1267 downheap (periodics, periodiccnt, 0);
1268 }
1269 else if (w->interval)
1270 {
1271 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1272 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1273 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1274 downheap (periodics, periodiccnt, 0);
1275 }
1276 else
1277 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1278
1279 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1280 }
1281}
1282
1283static void noinline
1284periodics_reschedule (EV_P)
1285{
1286 int i;
1287
1288 /* adjust periodics after time jump */
1289 for (i = 0; i < periodiccnt; ++i)
1290 {
1291 ev_periodic *w = (ev_periodic *)periodics [i];
1292
1293 if (w->reschedule_cb)
1294 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1295 else if (w->interval)
1296 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1297 }
1298
1299 /* now rebuild the heap */
1300 for (i = periodiccnt >> 1; i--; )
1301 downheap (periodics, periodiccnt, i);
1302}
1303#endif
1304
1305#if EV_IDLE_ENABLE 1798#if EV_IDLE_ENABLE
1306void inline_size 1799/* make idle watchers pending. this handles the "call-idle */
1800/* only when higher priorities are idle" logic */
1801inline_size void
1307idle_reify (EV_P) 1802idle_reify (EV_P)
1308{ 1803{
1309 if (expect_false (idleall)) 1804 if (expect_false (idleall))
1310 { 1805 {
1311 int pri; 1806 int pri;
… …
1323 } 1818 }
1324 } 1819 }
1325} 1820}
1326#endif 1821#endif
1327 1822
1328void inline_speed 1823/* make timers pending */
1824inline_size void
1825timers_reify (EV_P)
1826{
1827 EV_FREQUENT_CHECK;
1828
1829 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1830 {
1831 do
1832 {
1833 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1834
1835 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
1836
1837 /* first reschedule or stop timer */
1838 if (w->repeat)
1839 {
1840 ev_at (w) += w->repeat;
1841 if (ev_at (w) < mn_now)
1842 ev_at (w) = mn_now;
1843
1844 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1845
1846 ANHE_at_cache (timers [HEAP0]);
1847 downheap (timers, timercnt, HEAP0);
1848 }
1849 else
1850 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1851
1852 EV_FREQUENT_CHECK;
1853 feed_reverse (EV_A_ (W)w);
1854 }
1855 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1856
1857 feed_reverse_done (EV_A_ EV_TIMEOUT);
1858 }
1859}
1860
1861#if EV_PERIODIC_ENABLE
1862/* make periodics pending */
1863inline_size void
1864periodics_reify (EV_P)
1865{
1866 EV_FREQUENT_CHECK;
1867
1868 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1869 {
1870 int feed_count = 0;
1871
1872 do
1873 {
1874 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1875
1876 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1877
1878 /* first reschedule or stop timer */
1879 if (w->reschedule_cb)
1880 {
1881 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1882
1883 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1884
1885 ANHE_at_cache (periodics [HEAP0]);
1886 downheap (periodics, periodiccnt, HEAP0);
1887 }
1888 else if (w->interval)
1889 {
1890 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1891 /* if next trigger time is not sufficiently in the future, put it there */
1892 /* this might happen because of floating point inexactness */
1893 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1894 {
1895 ev_at (w) += w->interval;
1896
1897 /* if interval is unreasonably low we might still have a time in the past */
1898 /* so correct this. this will make the periodic very inexact, but the user */
1899 /* has effectively asked to get triggered more often than possible */
1900 if (ev_at (w) < ev_rt_now)
1901 ev_at (w) = ev_rt_now;
1902 }
1903
1904 ANHE_at_cache (periodics [HEAP0]);
1905 downheap (periodics, periodiccnt, HEAP0);
1906 }
1907 else
1908 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1909
1910 EV_FREQUENT_CHECK;
1911 feed_reverse (EV_A_ (W)w);
1912 }
1913 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1914
1915 feed_reverse_done (EV_A_ EV_PERIODIC);
1916 }
1917}
1918
1919/* simply recalculate all periodics */
1920/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1921static void noinline
1922periodics_reschedule (EV_P)
1923{
1924 int i;
1925
1926 /* adjust periodics after time jump */
1927 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1928 {
1929 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1930
1931 if (w->reschedule_cb)
1932 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1933 else if (w->interval)
1934 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1935
1936 ANHE_at_cache (periodics [i]);
1937 }
1938
1939 reheap (periodics, periodiccnt);
1940}
1941#endif
1942
1943/* adjust all timers by a given offset */
1944static void noinline
1945timers_reschedule (EV_P_ ev_tstamp adjust)
1946{
1947 int i;
1948
1949 for (i = 0; i < timercnt; ++i)
1950 {
1951 ANHE *he = timers + i + HEAP0;
1952 ANHE_w (*he)->at += adjust;
1953 ANHE_at_cache (*he);
1954 }
1955}
1956
1957/* fetch new monotonic and realtime times from the kernel */
1958/* also detetc if there was a timejump, and act accordingly */
1959inline_speed void
1329time_update (EV_P_ ev_tstamp max_block) 1960time_update (EV_P_ ev_tstamp max_block)
1330{ 1961{
1331 int i;
1332
1333#if EV_USE_MONOTONIC 1962#if EV_USE_MONOTONIC
1334 if (expect_true (have_monotonic)) 1963 if (expect_true (have_monotonic))
1335 { 1964 {
1965 int i;
1336 ev_tstamp odiff = rtmn_diff; 1966 ev_tstamp odiff = rtmn_diff;
1337 1967
1338 mn_now = get_clock (); 1968 mn_now = get_clock ();
1339 1969
1340 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 1970 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1358 */ 1988 */
1359 for (i = 4; --i; ) 1989 for (i = 4; --i; )
1360 { 1990 {
1361 rtmn_diff = ev_rt_now - mn_now; 1991 rtmn_diff = ev_rt_now - mn_now;
1362 1992
1363 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1993 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1364 return; /* all is well */ 1994 return; /* all is well */
1365 1995
1366 ev_rt_now = ev_time (); 1996 ev_rt_now = ev_time ();
1367 mn_now = get_clock (); 1997 mn_now = get_clock ();
1368 now_floor = mn_now; 1998 now_floor = mn_now;
1369 } 1999 }
1370 2000
2001 /* no timer adjustment, as the monotonic clock doesn't jump */
2002 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1371# if EV_PERIODIC_ENABLE 2003# if EV_PERIODIC_ENABLE
1372 periodics_reschedule (EV_A); 2004 periodics_reschedule (EV_A);
1373# endif 2005# endif
1374 /* no timer adjustment, as the monotonic clock doesn't jump */
1375 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1376 } 2006 }
1377 else 2007 else
1378#endif 2008#endif
1379 { 2009 {
1380 ev_rt_now = ev_time (); 2010 ev_rt_now = ev_time ();
1381 2011
1382 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 2012 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1383 { 2013 {
2014 /* adjust timers. this is easy, as the offset is the same for all of them */
2015 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1384#if EV_PERIODIC_ENABLE 2016#if EV_PERIODIC_ENABLE
1385 periodics_reschedule (EV_A); 2017 periodics_reschedule (EV_A);
1386#endif 2018#endif
1387 /* adjust timers. this is easy, as the offset is the same for all of them */
1388 for (i = 0; i < timercnt; ++i)
1389 ((WT)timers [i])->at += ev_rt_now - mn_now;
1390 } 2019 }
1391 2020
1392 mn_now = ev_rt_now; 2021 mn_now = ev_rt_now;
1393 } 2022 }
1394} 2023}
1395 2024
1396void
1397ev_ref (EV_P)
1398{
1399 ++activecnt;
1400}
1401
1402void
1403ev_unref (EV_P)
1404{
1405 --activecnt;
1406}
1407
1408static int loop_done; 2025static int loop_done;
1409 2026
1410void 2027void
1411ev_loop (EV_P_ int flags) 2028ev_loop (EV_P_ int flags)
1412{ 2029{
1413 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2030 loop_done = EVUNLOOP_CANCEL;
1414 ? EVUNLOOP_ONE
1415 : EVUNLOOP_CANCEL;
1416 2031
1417 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2032 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1418 2033
1419 do 2034 do
1420 { 2035 {
2036#if EV_VERIFY >= 2
2037 ev_loop_verify (EV_A);
2038#endif
2039
1421#ifndef _WIN32 2040#ifndef _WIN32
1422 if (expect_false (curpid)) /* penalise the forking check even more */ 2041 if (expect_false (curpid)) /* penalise the forking check even more */
1423 if (expect_false (getpid () != curpid)) 2042 if (expect_false (getpid () != curpid))
1424 { 2043 {
1425 curpid = getpid (); 2044 curpid = getpid ();
… …
1442 { 2061 {
1443 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2062 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1444 call_pending (EV_A); 2063 call_pending (EV_A);
1445 } 2064 }
1446 2065
1447 if (expect_false (!activecnt))
1448 break;
1449
1450 /* we might have forked, so reify kernel state if necessary */ 2066 /* we might have forked, so reify kernel state if necessary */
1451 if (expect_false (postfork)) 2067 if (expect_false (postfork))
1452 loop_fork (EV_A); 2068 loop_fork (EV_A);
1453 2069
1454 /* update fd-related kernel structures */ 2070 /* update fd-related kernel structures */
1455 fd_reify (EV_A); 2071 fd_reify (EV_A);
1456 2072
1457 /* calculate blocking time */ 2073 /* calculate blocking time */
1458 { 2074 {
1459 ev_tstamp block; 2075 ev_tstamp waittime = 0.;
2076 ev_tstamp sleeptime = 0.;
1460 2077
1461 if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt)) 2078 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1462 block = 0.; /* do not block at all */
1463 else
1464 { 2079 {
2080 /* remember old timestamp for io_blocktime calculation */
2081 ev_tstamp prev_mn_now = mn_now;
2082
1465 /* update time to cancel out callback processing overhead */ 2083 /* update time to cancel out callback processing overhead */
1466 time_update (EV_A_ 1e100); 2084 time_update (EV_A_ 1e100);
1467 2085
1468 block = MAX_BLOCKTIME; 2086 waittime = MAX_BLOCKTIME;
1469 2087
1470 if (timercnt) 2088 if (timercnt)
1471 { 2089 {
1472 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 2090 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1473 if (block > to) block = to; 2091 if (waittime > to) waittime = to;
1474 } 2092 }
1475 2093
1476#if EV_PERIODIC_ENABLE 2094#if EV_PERIODIC_ENABLE
1477 if (periodiccnt) 2095 if (periodiccnt)
1478 { 2096 {
1479 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 2097 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1480 if (block > to) block = to; 2098 if (waittime > to) waittime = to;
1481 } 2099 }
1482#endif 2100#endif
1483 2101
2102 /* don't let timeouts decrease the waittime below timeout_blocktime */
2103 if (expect_false (waittime < timeout_blocktime))
2104 waittime = timeout_blocktime;
2105
2106 /* extra check because io_blocktime is commonly 0 */
1484 if (expect_false (block < 0.)) block = 0.; 2107 if (expect_false (io_blocktime))
2108 {
2109 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2110
2111 if (sleeptime > waittime - backend_fudge)
2112 sleeptime = waittime - backend_fudge;
2113
2114 if (expect_true (sleeptime > 0.))
2115 {
2116 ev_sleep (sleeptime);
2117 waittime -= sleeptime;
2118 }
2119 }
1485 } 2120 }
1486 2121
1487 ++loop_count; 2122 ++loop_count;
1488 backend_poll (EV_A_ block); 2123 backend_poll (EV_A_ waittime);
1489 2124
1490 /* update ev_rt_now, do magic */ 2125 /* update ev_rt_now, do magic */
1491 time_update (EV_A_ block); 2126 time_update (EV_A_ waittime + sleeptime);
1492 } 2127 }
1493 2128
1494 /* queue pending timers and reschedule them */ 2129 /* queue pending timers and reschedule them */
1495 timers_reify (EV_A); /* relative timers called last */ 2130 timers_reify (EV_A); /* relative timers called last */
1496#if EV_PERIODIC_ENABLE 2131#if EV_PERIODIC_ENABLE
… …
1505 /* queue check watchers, to be executed first */ 2140 /* queue check watchers, to be executed first */
1506 if (expect_false (checkcnt)) 2141 if (expect_false (checkcnt))
1507 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2142 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1508 2143
1509 call_pending (EV_A); 2144 call_pending (EV_A);
1510
1511 } 2145 }
1512 while (expect_true (activecnt && !loop_done)); 2146 while (expect_true (
2147 activecnt
2148 && !loop_done
2149 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2150 ));
1513 2151
1514 if (loop_done == EVUNLOOP_ONE) 2152 if (loop_done == EVUNLOOP_ONE)
1515 loop_done = EVUNLOOP_CANCEL; 2153 loop_done = EVUNLOOP_CANCEL;
1516} 2154}
1517 2155
… …
1519ev_unloop (EV_P_ int how) 2157ev_unloop (EV_P_ int how)
1520{ 2158{
1521 loop_done = how; 2159 loop_done = how;
1522} 2160}
1523 2161
2162void
2163ev_ref (EV_P)
2164{
2165 ++activecnt;
2166}
2167
2168void
2169ev_unref (EV_P)
2170{
2171 --activecnt;
2172}
2173
2174void
2175ev_now_update (EV_P)
2176{
2177 time_update (EV_A_ 1e100);
2178}
2179
2180void
2181ev_suspend (EV_P)
2182{
2183 ev_now_update (EV_A);
2184}
2185
2186void
2187ev_resume (EV_P)
2188{
2189 ev_tstamp mn_prev = mn_now;
2190
2191 ev_now_update (EV_A);
2192 timers_reschedule (EV_A_ mn_now - mn_prev);
2193#if EV_PERIODIC_ENABLE
2194 /* TODO: really do this? */
2195 periodics_reschedule (EV_A);
2196#endif
2197}
2198
1524/*****************************************************************************/ 2199/*****************************************************************************/
2200/* singly-linked list management, used when the expected list length is short */
1525 2201
1526void inline_size 2202inline_size void
1527wlist_add (WL *head, WL elem) 2203wlist_add (WL *head, WL elem)
1528{ 2204{
1529 elem->next = *head; 2205 elem->next = *head;
1530 *head = elem; 2206 *head = elem;
1531} 2207}
1532 2208
1533void inline_size 2209inline_size void
1534wlist_del (WL *head, WL elem) 2210wlist_del (WL *head, WL elem)
1535{ 2211{
1536 while (*head) 2212 while (*head)
1537 { 2213 {
1538 if (*head == elem) 2214 if (*head == elem)
… …
1543 2219
1544 head = &(*head)->next; 2220 head = &(*head)->next;
1545 } 2221 }
1546} 2222}
1547 2223
1548void inline_speed 2224/* internal, faster, version of ev_clear_pending */
2225inline_speed void
1549clear_pending (EV_P_ W w) 2226clear_pending (EV_P_ W w)
1550{ 2227{
1551 if (w->pending) 2228 if (w->pending)
1552 { 2229 {
1553 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2230 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1554 w->pending = 0; 2231 w->pending = 0;
1555 } 2232 }
1556} 2233}
1557 2234
1558int 2235int
… …
1562 int pending = w_->pending; 2239 int pending = w_->pending;
1563 2240
1564 if (expect_true (pending)) 2241 if (expect_true (pending))
1565 { 2242 {
1566 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 2243 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2244 p->w = (W)&pending_w;
1567 w_->pending = 0; 2245 w_->pending = 0;
1568 p->w = 0;
1569 return p->events; 2246 return p->events;
1570 } 2247 }
1571 else 2248 else
1572 return 0; 2249 return 0;
1573} 2250}
1574 2251
1575void inline_size 2252inline_size void
1576pri_adjust (EV_P_ W w) 2253pri_adjust (EV_P_ W w)
1577{ 2254{
1578 int pri = w->priority; 2255 int pri = w->priority;
1579 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 2256 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1580 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 2257 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1581 w->priority = pri; 2258 w->priority = pri;
1582} 2259}
1583 2260
1584void inline_speed 2261inline_speed void
1585ev_start (EV_P_ W w, int active) 2262ev_start (EV_P_ W w, int active)
1586{ 2263{
1587 pri_adjust (EV_A_ w); 2264 pri_adjust (EV_A_ w);
1588 w->active = active; 2265 w->active = active;
1589 ev_ref (EV_A); 2266 ev_ref (EV_A);
1590} 2267}
1591 2268
1592void inline_size 2269inline_size void
1593ev_stop (EV_P_ W w) 2270ev_stop (EV_P_ W w)
1594{ 2271{
1595 ev_unref (EV_A); 2272 ev_unref (EV_A);
1596 w->active = 0; 2273 w->active = 0;
1597} 2274}
… …
1604 int fd = w->fd; 2281 int fd = w->fd;
1605 2282
1606 if (expect_false (ev_is_active (w))) 2283 if (expect_false (ev_is_active (w)))
1607 return; 2284 return;
1608 2285
1609 assert (("ev_io_start called with negative fd", fd >= 0)); 2286 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2287 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2288
2289 EV_FREQUENT_CHECK;
1610 2290
1611 ev_start (EV_A_ (W)w, 1); 2291 ev_start (EV_A_ (W)w, 1);
1612 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2292 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1613 wlist_add (&anfds[fd].head, (WL)w); 2293 wlist_add (&anfds[fd].head, (WL)w);
1614 2294
1615 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 2295 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
1616 w->events &= ~EV_IOFDSET; 2296 w->events &= ~EV__IOFDSET;
2297
2298 EV_FREQUENT_CHECK;
1617} 2299}
1618 2300
1619void noinline 2301void noinline
1620ev_io_stop (EV_P_ ev_io *w) 2302ev_io_stop (EV_P_ ev_io *w)
1621{ 2303{
1622 clear_pending (EV_A_ (W)w); 2304 clear_pending (EV_A_ (W)w);
1623 if (expect_false (!ev_is_active (w))) 2305 if (expect_false (!ev_is_active (w)))
1624 return; 2306 return;
1625 2307
1626 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2308 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2309
2310 EV_FREQUENT_CHECK;
1627 2311
1628 wlist_del (&anfds[w->fd].head, (WL)w); 2312 wlist_del (&anfds[w->fd].head, (WL)w);
1629 ev_stop (EV_A_ (W)w); 2313 ev_stop (EV_A_ (W)w);
1630 2314
1631 fd_change (EV_A_ w->fd, 1); 2315 fd_change (EV_A_ w->fd, 1);
2316
2317 EV_FREQUENT_CHECK;
1632} 2318}
1633 2319
1634void noinline 2320void noinline
1635ev_timer_start (EV_P_ ev_timer *w) 2321ev_timer_start (EV_P_ ev_timer *w)
1636{ 2322{
1637 if (expect_false (ev_is_active (w))) 2323 if (expect_false (ev_is_active (w)))
1638 return; 2324 return;
1639 2325
1640 ((WT)w)->at += mn_now; 2326 ev_at (w) += mn_now;
1641 2327
1642 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2328 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1643 2329
2330 EV_FREQUENT_CHECK;
2331
2332 ++timercnt;
1644 ev_start (EV_A_ (W)w, ++timercnt); 2333 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1645 array_needsize (WT, timers, timermax, timercnt, EMPTY2); 2334 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1646 timers [timercnt - 1] = (WT)w; 2335 ANHE_w (timers [ev_active (w)]) = (WT)w;
1647 upheap (timers, timercnt - 1); 2336 ANHE_at_cache (timers [ev_active (w)]);
2337 upheap (timers, ev_active (w));
1648 2338
2339 EV_FREQUENT_CHECK;
2340
1649 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 2341 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1650} 2342}
1651 2343
1652void noinline 2344void noinline
1653ev_timer_stop (EV_P_ ev_timer *w) 2345ev_timer_stop (EV_P_ ev_timer *w)
1654{ 2346{
1655 clear_pending (EV_A_ (W)w); 2347 clear_pending (EV_A_ (W)w);
1656 if (expect_false (!ev_is_active (w))) 2348 if (expect_false (!ev_is_active (w)))
1657 return; 2349 return;
1658 2350
1659 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w)); 2351 EV_FREQUENT_CHECK;
1660 2352
1661 { 2353 {
1662 int active = ((W)w)->active; 2354 int active = ev_active (w);
1663 2355
2356 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2357
2358 --timercnt;
2359
1664 if (expect_true (--active < --timercnt)) 2360 if (expect_true (active < timercnt + HEAP0))
1665 { 2361 {
1666 timers [active] = timers [timercnt]; 2362 timers [active] = timers [timercnt + HEAP0];
1667 adjustheap (timers, timercnt, active); 2363 adjustheap (timers, timercnt, active);
1668 } 2364 }
1669 } 2365 }
1670 2366
1671 ((WT)w)->at -= mn_now; 2367 EV_FREQUENT_CHECK;
2368
2369 ev_at (w) -= mn_now;
1672 2370
1673 ev_stop (EV_A_ (W)w); 2371 ev_stop (EV_A_ (W)w);
1674} 2372}
1675 2373
1676void noinline 2374void noinline
1677ev_timer_again (EV_P_ ev_timer *w) 2375ev_timer_again (EV_P_ ev_timer *w)
1678{ 2376{
2377 EV_FREQUENT_CHECK;
2378
1679 if (ev_is_active (w)) 2379 if (ev_is_active (w))
1680 { 2380 {
1681 if (w->repeat) 2381 if (w->repeat)
1682 { 2382 {
1683 ((WT)w)->at = mn_now + w->repeat; 2383 ev_at (w) = mn_now + w->repeat;
2384 ANHE_at_cache (timers [ev_active (w)]);
1684 adjustheap (timers, timercnt, ((W)w)->active - 1); 2385 adjustheap (timers, timercnt, ev_active (w));
1685 } 2386 }
1686 else 2387 else
1687 ev_timer_stop (EV_A_ w); 2388 ev_timer_stop (EV_A_ w);
1688 } 2389 }
1689 else if (w->repeat) 2390 else if (w->repeat)
1690 { 2391 {
1691 w->at = w->repeat; 2392 ev_at (w) = w->repeat;
1692 ev_timer_start (EV_A_ w); 2393 ev_timer_start (EV_A_ w);
1693 } 2394 }
2395
2396 EV_FREQUENT_CHECK;
1694} 2397}
1695 2398
1696#if EV_PERIODIC_ENABLE 2399#if EV_PERIODIC_ENABLE
1697void noinline 2400void noinline
1698ev_periodic_start (EV_P_ ev_periodic *w) 2401ev_periodic_start (EV_P_ ev_periodic *w)
1699{ 2402{
1700 if (expect_false (ev_is_active (w))) 2403 if (expect_false (ev_is_active (w)))
1701 return; 2404 return;
1702 2405
1703 if (w->reschedule_cb) 2406 if (w->reschedule_cb)
1704 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2407 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1705 else if (w->interval) 2408 else if (w->interval)
1706 { 2409 {
1707 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2410 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1708 /* this formula differs from the one in periodic_reify because we do not always round up */ 2411 /* this formula differs from the one in periodic_reify because we do not always round up */
1709 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2412 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1710 } 2413 }
1711 else 2414 else
1712 ((WT)w)->at = w->offset; 2415 ev_at (w) = w->offset;
1713 2416
2417 EV_FREQUENT_CHECK;
2418
2419 ++periodiccnt;
1714 ev_start (EV_A_ (W)w, ++periodiccnt); 2420 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1715 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2); 2421 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1716 periodics [periodiccnt - 1] = (WT)w; 2422 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1717 upheap (periodics, periodiccnt - 1); 2423 ANHE_at_cache (periodics [ev_active (w)]);
2424 upheap (periodics, ev_active (w));
1718 2425
2426 EV_FREQUENT_CHECK;
2427
1719 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 2428 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1720} 2429}
1721 2430
1722void noinline 2431void noinline
1723ev_periodic_stop (EV_P_ ev_periodic *w) 2432ev_periodic_stop (EV_P_ ev_periodic *w)
1724{ 2433{
1725 clear_pending (EV_A_ (W)w); 2434 clear_pending (EV_A_ (W)w);
1726 if (expect_false (!ev_is_active (w))) 2435 if (expect_false (!ev_is_active (w)))
1727 return; 2436 return;
1728 2437
1729 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w)); 2438 EV_FREQUENT_CHECK;
1730 2439
1731 { 2440 {
1732 int active = ((W)w)->active; 2441 int active = ev_active (w);
1733 2442
2443 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2444
2445 --periodiccnt;
2446
1734 if (expect_true (--active < --periodiccnt)) 2447 if (expect_true (active < periodiccnt + HEAP0))
1735 { 2448 {
1736 periodics [active] = periodics [periodiccnt]; 2449 periodics [active] = periodics [periodiccnt + HEAP0];
1737 adjustheap (periodics, periodiccnt, active); 2450 adjustheap (periodics, periodiccnt, active);
1738 } 2451 }
1739 } 2452 }
1740 2453
2454 EV_FREQUENT_CHECK;
2455
1741 ev_stop (EV_A_ (W)w); 2456 ev_stop (EV_A_ (W)w);
1742} 2457}
1743 2458
1744void noinline 2459void noinline
1745ev_periodic_again (EV_P_ ev_periodic *w) 2460ev_periodic_again (EV_P_ ev_periodic *w)
… …
1756 2471
1757void noinline 2472void noinline
1758ev_signal_start (EV_P_ ev_signal *w) 2473ev_signal_start (EV_P_ ev_signal *w)
1759{ 2474{
1760#if EV_MULTIPLICITY 2475#if EV_MULTIPLICITY
1761 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 2476 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1762#endif 2477#endif
1763 if (expect_false (ev_is_active (w))) 2478 if (expect_false (ev_is_active (w)))
1764 return; 2479 return;
1765 2480
1766 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2481 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2482
2483 evpipe_init (EV_A);
2484
2485 EV_FREQUENT_CHECK;
1767 2486
1768 { 2487 {
1769#ifndef _WIN32 2488#ifndef _WIN32
1770 sigset_t full, prev; 2489 sigset_t full, prev;
1771 sigfillset (&full); 2490 sigfillset (&full);
1772 sigprocmask (SIG_SETMASK, &full, &prev); 2491 sigprocmask (SIG_SETMASK, &full, &prev);
1773#endif 2492#endif
1774 2493
1775 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 2494 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
1776 2495
1777#ifndef _WIN32 2496#ifndef _WIN32
1778 sigprocmask (SIG_SETMASK, &prev, 0); 2497 sigprocmask (SIG_SETMASK, &prev, 0);
1779#endif 2498#endif
1780 } 2499 }
… …
1783 wlist_add (&signals [w->signum - 1].head, (WL)w); 2502 wlist_add (&signals [w->signum - 1].head, (WL)w);
1784 2503
1785 if (!((WL)w)->next) 2504 if (!((WL)w)->next)
1786 { 2505 {
1787#if _WIN32 2506#if _WIN32
1788 signal (w->signum, sighandler); 2507 signal (w->signum, ev_sighandler);
1789#else 2508#else
1790 struct sigaction sa; 2509 struct sigaction sa;
1791 sa.sa_handler = sighandler; 2510 sa.sa_handler = ev_sighandler;
1792 sigfillset (&sa.sa_mask); 2511 sigfillset (&sa.sa_mask);
1793 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2512 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1794 sigaction (w->signum, &sa, 0); 2513 sigaction (w->signum, &sa, 0);
1795#endif 2514#endif
1796 } 2515 }
2516
2517 EV_FREQUENT_CHECK;
1797} 2518}
1798 2519
1799void noinline 2520void noinline
1800ev_signal_stop (EV_P_ ev_signal *w) 2521ev_signal_stop (EV_P_ ev_signal *w)
1801{ 2522{
1802 clear_pending (EV_A_ (W)w); 2523 clear_pending (EV_A_ (W)w);
1803 if (expect_false (!ev_is_active (w))) 2524 if (expect_false (!ev_is_active (w)))
1804 return; 2525 return;
1805 2526
2527 EV_FREQUENT_CHECK;
2528
1806 wlist_del (&signals [w->signum - 1].head, (WL)w); 2529 wlist_del (&signals [w->signum - 1].head, (WL)w);
1807 ev_stop (EV_A_ (W)w); 2530 ev_stop (EV_A_ (W)w);
1808 2531
1809 if (!signals [w->signum - 1].head) 2532 if (!signals [w->signum - 1].head)
1810 signal (w->signum, SIG_DFL); 2533 signal (w->signum, SIG_DFL);
2534
2535 EV_FREQUENT_CHECK;
1811} 2536}
1812 2537
1813void 2538void
1814ev_child_start (EV_P_ ev_child *w) 2539ev_child_start (EV_P_ ev_child *w)
1815{ 2540{
1816#if EV_MULTIPLICITY 2541#if EV_MULTIPLICITY
1817 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 2542 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1818#endif 2543#endif
1819 if (expect_false (ev_is_active (w))) 2544 if (expect_false (ev_is_active (w)))
1820 return; 2545 return;
1821 2546
2547 EV_FREQUENT_CHECK;
2548
1822 ev_start (EV_A_ (W)w, 1); 2549 ev_start (EV_A_ (W)w, 1);
1823 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 2550 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2551
2552 EV_FREQUENT_CHECK;
1824} 2553}
1825 2554
1826void 2555void
1827ev_child_stop (EV_P_ ev_child *w) 2556ev_child_stop (EV_P_ ev_child *w)
1828{ 2557{
1829 clear_pending (EV_A_ (W)w); 2558 clear_pending (EV_A_ (W)w);
1830 if (expect_false (!ev_is_active (w))) 2559 if (expect_false (!ev_is_active (w)))
1831 return; 2560 return;
1832 2561
2562 EV_FREQUENT_CHECK;
2563
1833 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 2564 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1834 ev_stop (EV_A_ (W)w); 2565 ev_stop (EV_A_ (W)w);
2566
2567 EV_FREQUENT_CHECK;
1835} 2568}
1836 2569
1837#if EV_STAT_ENABLE 2570#if EV_STAT_ENABLE
1838 2571
1839# ifdef _WIN32 2572# ifdef _WIN32
1840# undef lstat 2573# undef lstat
1841# define lstat(a,b) _stati64 (a,b) 2574# define lstat(a,b) _stati64 (a,b)
1842# endif 2575# endif
1843 2576
1844#define DEF_STAT_INTERVAL 5.0074891 2577#define DEF_STAT_INTERVAL 5.0074891
2578#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1845#define MIN_STAT_INTERVAL 0.1074891 2579#define MIN_STAT_INTERVAL 0.1074891
1846 2580
1847static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 2581static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1848 2582
1849#if EV_USE_INOTIFY 2583#if EV_USE_INOTIFY
1850# define EV_INOTIFY_BUFSIZE 8192 2584# define EV_INOTIFY_BUFSIZE 8192
… …
1854{ 2588{
1855 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); 2589 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);
1856 2590
1857 if (w->wd < 0) 2591 if (w->wd < 0)
1858 { 2592 {
2593 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1859 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 2594 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1860 2595
1861 /* monitor some parent directory for speedup hints */ 2596 /* monitor some parent directory for speedup hints */
2597 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2598 /* but an efficiency issue only */
1862 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 2599 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1863 { 2600 {
1864 char path [4096]; 2601 char path [4096];
1865 strcpy (path, w->path); 2602 strcpy (path, w->path);
1866 2603
… …
1869 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 2606 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1870 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 2607 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1871 2608
1872 char *pend = strrchr (path, '/'); 2609 char *pend = strrchr (path, '/');
1873 2610
1874 if (!pend) 2611 if (!pend || pend == path)
1875 break; /* whoops, no '/', complain to your admin */ 2612 break;
1876 2613
1877 *pend = 0; 2614 *pend = 0;
1878 w->wd = inotify_add_watch (fs_fd, path, mask); 2615 w->wd = inotify_add_watch (fs_fd, path, mask);
1879 } 2616 }
1880 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 2617 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1881 } 2618 }
1882 } 2619 }
1883 else
1884 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1885 2620
1886 if (w->wd >= 0) 2621 if (w->wd >= 0)
2622 {
1887 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 2623 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2624
2625 /* now local changes will be tracked by inotify, but remote changes won't */
2626 /* unless the filesystem it known to be local, we therefore still poll */
2627 /* also do poll on <2.6.25, but with normal frequency */
2628 struct statfs sfs;
2629
2630 if (fs_2625 && !statfs (w->path, &sfs))
2631 if (sfs.f_type == 0x1373 /* devfs */
2632 || sfs.f_type == 0xEF53 /* ext2/3 */
2633 || sfs.f_type == 0x3153464a /* jfs */
2634 || sfs.f_type == 0x52654973 /* reiser3 */
2635 || sfs.f_type == 0x01021994 /* tempfs */
2636 || sfs.f_type == 0x58465342 /* xfs */)
2637 return;
2638
2639 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2640 ev_timer_again (EV_A_ &w->timer);
2641 }
1888} 2642}
1889 2643
1890static void noinline 2644static void noinline
1891infy_del (EV_P_ ev_stat *w) 2645infy_del (EV_P_ ev_stat *w)
1892{ 2646{
… …
1906 2660
1907static void noinline 2661static void noinline
1908infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 2662infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1909{ 2663{
1910 if (slot < 0) 2664 if (slot < 0)
1911 /* overflow, need to check for all hahs slots */ 2665 /* overflow, need to check for all hash slots */
1912 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 2666 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
1913 infy_wd (EV_A_ slot, wd, ev); 2667 infy_wd (EV_A_ slot, wd, ev);
1914 else 2668 else
1915 { 2669 {
1916 WL w_; 2670 WL w_;
… …
1922 2676
1923 if (w->wd == wd || wd == -1) 2677 if (w->wd == wd || wd == -1)
1924 { 2678 {
1925 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 2679 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1926 { 2680 {
2681 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
1927 w->wd = -1; 2682 w->wd = -1;
1928 infy_add (EV_A_ w); /* re-add, no matter what */ 2683 infy_add (EV_A_ w); /* re-add, no matter what */
1929 } 2684 }
1930 2685
1931 stat_timer_cb (EV_A_ &w->timer, 0); 2686 stat_timer_cb (EV_A_ &w->timer, 0);
… …
1944 2699
1945 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 2700 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
1946 infy_wd (EV_A_ ev->wd, ev->wd, ev); 2701 infy_wd (EV_A_ ev->wd, ev->wd, ev);
1947} 2702}
1948 2703
1949void inline_size 2704inline_size void
2705check_2625 (EV_P)
2706{
2707 /* kernels < 2.6.25 are borked
2708 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2709 */
2710 struct utsname buf;
2711 int major, minor, micro;
2712
2713 if (uname (&buf))
2714 return;
2715
2716 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2717 return;
2718
2719 if (major < 2
2720 || (major == 2 && minor < 6)
2721 || (major == 2 && minor == 6 && micro < 25))
2722 return;
2723
2724 fs_2625 = 1;
2725}
2726
2727inline_size void
1950infy_init (EV_P) 2728infy_init (EV_P)
1951{ 2729{
1952 if (fs_fd != -2) 2730 if (fs_fd != -2)
1953 return; 2731 return;
2732
2733 fs_fd = -1;
2734
2735 check_2625 (EV_A);
1954 2736
1955 fs_fd = inotify_init (); 2737 fs_fd = inotify_init ();
1956 2738
1957 if (fs_fd >= 0) 2739 if (fs_fd >= 0)
1958 { 2740 {
… …
1960 ev_set_priority (&fs_w, EV_MAXPRI); 2742 ev_set_priority (&fs_w, EV_MAXPRI);
1961 ev_io_start (EV_A_ &fs_w); 2743 ev_io_start (EV_A_ &fs_w);
1962 } 2744 }
1963} 2745}
1964 2746
1965void inline_size 2747inline_size void
1966infy_fork (EV_P) 2748infy_fork (EV_P)
1967{ 2749{
1968 int slot; 2750 int slot;
1969 2751
1970 if (fs_fd < 0) 2752 if (fs_fd < 0)
… …
1986 w->wd = -1; 2768 w->wd = -1;
1987 2769
1988 if (fs_fd >= 0) 2770 if (fs_fd >= 0)
1989 infy_add (EV_A_ w); /* re-add, no matter what */ 2771 infy_add (EV_A_ w); /* re-add, no matter what */
1990 else 2772 else
1991 ev_timer_start (EV_A_ &w->timer); 2773 ev_timer_again (EV_A_ &w->timer);
1992 } 2774 }
1993
1994 } 2775 }
1995} 2776}
1996 2777
2778#endif
2779
2780#ifdef _WIN32
2781# define EV_LSTAT(p,b) _stati64 (p, b)
2782#else
2783# define EV_LSTAT(p,b) lstat (p, b)
1997#endif 2784#endif
1998 2785
1999void 2786void
2000ev_stat_stat (EV_P_ ev_stat *w) 2787ev_stat_stat (EV_P_ ev_stat *w)
2001{ 2788{
… …
2028 || w->prev.st_atime != w->attr.st_atime 2815 || w->prev.st_atime != w->attr.st_atime
2029 || w->prev.st_mtime != w->attr.st_mtime 2816 || w->prev.st_mtime != w->attr.st_mtime
2030 || w->prev.st_ctime != w->attr.st_ctime 2817 || w->prev.st_ctime != w->attr.st_ctime
2031 ) { 2818 ) {
2032 #if EV_USE_INOTIFY 2819 #if EV_USE_INOTIFY
2820 if (fs_fd >= 0)
2821 {
2033 infy_del (EV_A_ w); 2822 infy_del (EV_A_ w);
2034 infy_add (EV_A_ w); 2823 infy_add (EV_A_ w);
2035 ev_stat_stat (EV_A_ w); /* avoid race... */ 2824 ev_stat_stat (EV_A_ w); /* avoid race... */
2825 }
2036 #endif 2826 #endif
2037 2827
2038 ev_feed_event (EV_A_ w, EV_STAT); 2828 ev_feed_event (EV_A_ w, EV_STAT);
2039 } 2829 }
2040} 2830}
… …
2043ev_stat_start (EV_P_ ev_stat *w) 2833ev_stat_start (EV_P_ ev_stat *w)
2044{ 2834{
2045 if (expect_false (ev_is_active (w))) 2835 if (expect_false (ev_is_active (w)))
2046 return; 2836 return;
2047 2837
2048 /* since we use memcmp, we need to clear any padding data etc. */
2049 memset (&w->prev, 0, sizeof (ev_statdata));
2050 memset (&w->attr, 0, sizeof (ev_statdata));
2051
2052 ev_stat_stat (EV_A_ w); 2838 ev_stat_stat (EV_A_ w);
2053 2839
2840 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2054 if (w->interval < MIN_STAT_INTERVAL) 2841 w->interval = MIN_STAT_INTERVAL;
2055 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2056 2842
2057 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 2843 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2058 ev_set_priority (&w->timer, ev_priority (w)); 2844 ev_set_priority (&w->timer, ev_priority (w));
2059 2845
2060#if EV_USE_INOTIFY 2846#if EV_USE_INOTIFY
2061 infy_init (EV_A); 2847 infy_init (EV_A);
2062 2848
2063 if (fs_fd >= 0) 2849 if (fs_fd >= 0)
2064 infy_add (EV_A_ w); 2850 infy_add (EV_A_ w);
2065 else 2851 else
2066#endif 2852#endif
2067 ev_timer_start (EV_A_ &w->timer); 2853 ev_timer_again (EV_A_ &w->timer);
2068 2854
2069 ev_start (EV_A_ (W)w, 1); 2855 ev_start (EV_A_ (W)w, 1);
2856
2857 EV_FREQUENT_CHECK;
2070} 2858}
2071 2859
2072void 2860void
2073ev_stat_stop (EV_P_ ev_stat *w) 2861ev_stat_stop (EV_P_ ev_stat *w)
2074{ 2862{
2075 clear_pending (EV_A_ (W)w); 2863 clear_pending (EV_A_ (W)w);
2076 if (expect_false (!ev_is_active (w))) 2864 if (expect_false (!ev_is_active (w)))
2077 return; 2865 return;
2078 2866
2867 EV_FREQUENT_CHECK;
2868
2079#if EV_USE_INOTIFY 2869#if EV_USE_INOTIFY
2080 infy_del (EV_A_ w); 2870 infy_del (EV_A_ w);
2081#endif 2871#endif
2082 ev_timer_stop (EV_A_ &w->timer); 2872 ev_timer_stop (EV_A_ &w->timer);
2083 2873
2084 ev_stop (EV_A_ (W)w); 2874 ev_stop (EV_A_ (W)w);
2875
2876 EV_FREQUENT_CHECK;
2085} 2877}
2086#endif 2878#endif
2087 2879
2088#if EV_IDLE_ENABLE 2880#if EV_IDLE_ENABLE
2089void 2881void
… …
2091{ 2883{
2092 if (expect_false (ev_is_active (w))) 2884 if (expect_false (ev_is_active (w)))
2093 return; 2885 return;
2094 2886
2095 pri_adjust (EV_A_ (W)w); 2887 pri_adjust (EV_A_ (W)w);
2888
2889 EV_FREQUENT_CHECK;
2096 2890
2097 { 2891 {
2098 int active = ++idlecnt [ABSPRI (w)]; 2892 int active = ++idlecnt [ABSPRI (w)];
2099 2893
2100 ++idleall; 2894 ++idleall;
2101 ev_start (EV_A_ (W)w, active); 2895 ev_start (EV_A_ (W)w, active);
2102 2896
2103 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 2897 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2104 idles [ABSPRI (w)][active - 1] = w; 2898 idles [ABSPRI (w)][active - 1] = w;
2105 } 2899 }
2900
2901 EV_FREQUENT_CHECK;
2106} 2902}
2107 2903
2108void 2904void
2109ev_idle_stop (EV_P_ ev_idle *w) 2905ev_idle_stop (EV_P_ ev_idle *w)
2110{ 2906{
2111 clear_pending (EV_A_ (W)w); 2907 clear_pending (EV_A_ (W)w);
2112 if (expect_false (!ev_is_active (w))) 2908 if (expect_false (!ev_is_active (w)))
2113 return; 2909 return;
2114 2910
2911 EV_FREQUENT_CHECK;
2912
2115 { 2913 {
2116 int active = ((W)w)->active; 2914 int active = ev_active (w);
2117 2915
2118 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 2916 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2119 ((W)idles [ABSPRI (w)][active - 1])->active = active; 2917 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2120 2918
2121 ev_stop (EV_A_ (W)w); 2919 ev_stop (EV_A_ (W)w);
2122 --idleall; 2920 --idleall;
2123 } 2921 }
2922
2923 EV_FREQUENT_CHECK;
2124} 2924}
2125#endif 2925#endif
2126 2926
2127void 2927void
2128ev_prepare_start (EV_P_ ev_prepare *w) 2928ev_prepare_start (EV_P_ ev_prepare *w)
2129{ 2929{
2130 if (expect_false (ev_is_active (w))) 2930 if (expect_false (ev_is_active (w)))
2131 return; 2931 return;
2932
2933 EV_FREQUENT_CHECK;
2132 2934
2133 ev_start (EV_A_ (W)w, ++preparecnt); 2935 ev_start (EV_A_ (W)w, ++preparecnt);
2134 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 2936 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2135 prepares [preparecnt - 1] = w; 2937 prepares [preparecnt - 1] = w;
2938
2939 EV_FREQUENT_CHECK;
2136} 2940}
2137 2941
2138void 2942void
2139ev_prepare_stop (EV_P_ ev_prepare *w) 2943ev_prepare_stop (EV_P_ ev_prepare *w)
2140{ 2944{
2141 clear_pending (EV_A_ (W)w); 2945 clear_pending (EV_A_ (W)w);
2142 if (expect_false (!ev_is_active (w))) 2946 if (expect_false (!ev_is_active (w)))
2143 return; 2947 return;
2144 2948
2949 EV_FREQUENT_CHECK;
2950
2145 { 2951 {
2146 int active = ((W)w)->active; 2952 int active = ev_active (w);
2953
2147 prepares [active - 1] = prepares [--preparecnt]; 2954 prepares [active - 1] = prepares [--preparecnt];
2148 ((W)prepares [active - 1])->active = active; 2955 ev_active (prepares [active - 1]) = active;
2149 } 2956 }
2150 2957
2151 ev_stop (EV_A_ (W)w); 2958 ev_stop (EV_A_ (W)w);
2959
2960 EV_FREQUENT_CHECK;
2152} 2961}
2153 2962
2154void 2963void
2155ev_check_start (EV_P_ ev_check *w) 2964ev_check_start (EV_P_ ev_check *w)
2156{ 2965{
2157 if (expect_false (ev_is_active (w))) 2966 if (expect_false (ev_is_active (w)))
2158 return; 2967 return;
2968
2969 EV_FREQUENT_CHECK;
2159 2970
2160 ev_start (EV_A_ (W)w, ++checkcnt); 2971 ev_start (EV_A_ (W)w, ++checkcnt);
2161 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 2972 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2162 checks [checkcnt - 1] = w; 2973 checks [checkcnt - 1] = w;
2974
2975 EV_FREQUENT_CHECK;
2163} 2976}
2164 2977
2165void 2978void
2166ev_check_stop (EV_P_ ev_check *w) 2979ev_check_stop (EV_P_ ev_check *w)
2167{ 2980{
2168 clear_pending (EV_A_ (W)w); 2981 clear_pending (EV_A_ (W)w);
2169 if (expect_false (!ev_is_active (w))) 2982 if (expect_false (!ev_is_active (w)))
2170 return; 2983 return;
2171 2984
2985 EV_FREQUENT_CHECK;
2986
2172 { 2987 {
2173 int active = ((W)w)->active; 2988 int active = ev_active (w);
2989
2174 checks [active - 1] = checks [--checkcnt]; 2990 checks [active - 1] = checks [--checkcnt];
2175 ((W)checks [active - 1])->active = active; 2991 ev_active (checks [active - 1]) = active;
2176 } 2992 }
2177 2993
2178 ev_stop (EV_A_ (W)w); 2994 ev_stop (EV_A_ (W)w);
2995
2996 EV_FREQUENT_CHECK;
2179} 2997}
2180 2998
2181#if EV_EMBED_ENABLE 2999#if EV_EMBED_ENABLE
2182void noinline 3000void noinline
2183ev_embed_sweep (EV_P_ ev_embed *w) 3001ev_embed_sweep (EV_P_ ev_embed *w)
2184{ 3002{
2185 ev_loop (w->loop, EVLOOP_NONBLOCK); 3003 ev_loop (w->other, EVLOOP_NONBLOCK);
2186} 3004}
2187 3005
2188static void 3006static void
2189embed_cb (EV_P_ ev_io *io, int revents) 3007embed_io_cb (EV_P_ ev_io *io, int revents)
2190{ 3008{
2191 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3009 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2192 3010
2193 if (ev_cb (w)) 3011 if (ev_cb (w))
2194 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3012 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2195 else 3013 else
2196 ev_embed_sweep (loop, w); 3014 ev_loop (w->other, EVLOOP_NONBLOCK);
2197} 3015}
3016
3017static void
3018embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3019{
3020 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3021
3022 {
3023 struct ev_loop *loop = w->other;
3024
3025 while (fdchangecnt)
3026 {
3027 fd_reify (EV_A);
3028 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3029 }
3030 }
3031}
3032
3033static void
3034embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3035{
3036 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3037
3038 ev_embed_stop (EV_A_ w);
3039
3040 {
3041 struct ev_loop *loop = w->other;
3042
3043 ev_loop_fork (EV_A);
3044 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3045 }
3046
3047 ev_embed_start (EV_A_ w);
3048}
3049
3050#if 0
3051static void
3052embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3053{
3054 ev_idle_stop (EV_A_ idle);
3055}
3056#endif
2198 3057
2199void 3058void
2200ev_embed_start (EV_P_ ev_embed *w) 3059ev_embed_start (EV_P_ ev_embed *w)
2201{ 3060{
2202 if (expect_false (ev_is_active (w))) 3061 if (expect_false (ev_is_active (w)))
2203 return; 3062 return;
2204 3063
2205 { 3064 {
2206 struct ev_loop *loop = w->loop; 3065 struct ev_loop *loop = w->other;
2207 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 3066 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2208 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 3067 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2209 } 3068 }
3069
3070 EV_FREQUENT_CHECK;
2210 3071
2211 ev_set_priority (&w->io, ev_priority (w)); 3072 ev_set_priority (&w->io, ev_priority (w));
2212 ev_io_start (EV_A_ &w->io); 3073 ev_io_start (EV_A_ &w->io);
2213 3074
3075 ev_prepare_init (&w->prepare, embed_prepare_cb);
3076 ev_set_priority (&w->prepare, EV_MINPRI);
3077 ev_prepare_start (EV_A_ &w->prepare);
3078
3079 ev_fork_init (&w->fork, embed_fork_cb);
3080 ev_fork_start (EV_A_ &w->fork);
3081
3082 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3083
2214 ev_start (EV_A_ (W)w, 1); 3084 ev_start (EV_A_ (W)w, 1);
3085
3086 EV_FREQUENT_CHECK;
2215} 3087}
2216 3088
2217void 3089void
2218ev_embed_stop (EV_P_ ev_embed *w) 3090ev_embed_stop (EV_P_ ev_embed *w)
2219{ 3091{
2220 clear_pending (EV_A_ (W)w); 3092 clear_pending (EV_A_ (W)w);
2221 if (expect_false (!ev_is_active (w))) 3093 if (expect_false (!ev_is_active (w)))
2222 return; 3094 return;
2223 3095
3096 EV_FREQUENT_CHECK;
3097
2224 ev_io_stop (EV_A_ &w->io); 3098 ev_io_stop (EV_A_ &w->io);
3099 ev_prepare_stop (EV_A_ &w->prepare);
3100 ev_fork_stop (EV_A_ &w->fork);
2225 3101
2226 ev_stop (EV_A_ (W)w); 3102 EV_FREQUENT_CHECK;
2227} 3103}
2228#endif 3104#endif
2229 3105
2230#if EV_FORK_ENABLE 3106#if EV_FORK_ENABLE
2231void 3107void
2232ev_fork_start (EV_P_ ev_fork *w) 3108ev_fork_start (EV_P_ ev_fork *w)
2233{ 3109{
2234 if (expect_false (ev_is_active (w))) 3110 if (expect_false (ev_is_active (w)))
2235 return; 3111 return;
3112
3113 EV_FREQUENT_CHECK;
2236 3114
2237 ev_start (EV_A_ (W)w, ++forkcnt); 3115 ev_start (EV_A_ (W)w, ++forkcnt);
2238 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 3116 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2239 forks [forkcnt - 1] = w; 3117 forks [forkcnt - 1] = w;
3118
3119 EV_FREQUENT_CHECK;
2240} 3120}
2241 3121
2242void 3122void
2243ev_fork_stop (EV_P_ ev_fork *w) 3123ev_fork_stop (EV_P_ ev_fork *w)
2244{ 3124{
2245 clear_pending (EV_A_ (W)w); 3125 clear_pending (EV_A_ (W)w);
2246 if (expect_false (!ev_is_active (w))) 3126 if (expect_false (!ev_is_active (w)))
2247 return; 3127 return;
2248 3128
3129 EV_FREQUENT_CHECK;
3130
2249 { 3131 {
2250 int active = ((W)w)->active; 3132 int active = ev_active (w);
3133
2251 forks [active - 1] = forks [--forkcnt]; 3134 forks [active - 1] = forks [--forkcnt];
2252 ((W)forks [active - 1])->active = active; 3135 ev_active (forks [active - 1]) = active;
2253 } 3136 }
2254 3137
2255 ev_stop (EV_A_ (W)w); 3138 ev_stop (EV_A_ (W)w);
3139
3140 EV_FREQUENT_CHECK;
3141}
3142#endif
3143
3144#if EV_ASYNC_ENABLE
3145void
3146ev_async_start (EV_P_ ev_async *w)
3147{
3148 if (expect_false (ev_is_active (w)))
3149 return;
3150
3151 evpipe_init (EV_A);
3152
3153 EV_FREQUENT_CHECK;
3154
3155 ev_start (EV_A_ (W)w, ++asynccnt);
3156 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3157 asyncs [asynccnt - 1] = w;
3158
3159 EV_FREQUENT_CHECK;
3160}
3161
3162void
3163ev_async_stop (EV_P_ ev_async *w)
3164{
3165 clear_pending (EV_A_ (W)w);
3166 if (expect_false (!ev_is_active (w)))
3167 return;
3168
3169 EV_FREQUENT_CHECK;
3170
3171 {
3172 int active = ev_active (w);
3173
3174 asyncs [active - 1] = asyncs [--asynccnt];
3175 ev_active (asyncs [active - 1]) = active;
3176 }
3177
3178 ev_stop (EV_A_ (W)w);
3179
3180 EV_FREQUENT_CHECK;
3181}
3182
3183void
3184ev_async_send (EV_P_ ev_async *w)
3185{
3186 w->sent = 1;
3187 evpipe_write (EV_A_ &gotasync);
2256} 3188}
2257#endif 3189#endif
2258 3190
2259/*****************************************************************************/ 3191/*****************************************************************************/
2260 3192
… …
2270once_cb (EV_P_ struct ev_once *once, int revents) 3202once_cb (EV_P_ struct ev_once *once, int revents)
2271{ 3203{
2272 void (*cb)(int revents, void *arg) = once->cb; 3204 void (*cb)(int revents, void *arg) = once->cb;
2273 void *arg = once->arg; 3205 void *arg = once->arg;
2274 3206
2275 ev_io_stop (EV_A_ &once->io); 3207 ev_io_stop (EV_A_ &once->io);
2276 ev_timer_stop (EV_A_ &once->to); 3208 ev_timer_stop (EV_A_ &once->to);
2277 ev_free (once); 3209 ev_free (once);
2278 3210
2279 cb (revents, arg); 3211 cb (revents, arg);
2280} 3212}
2281 3213
2282static void 3214static void
2283once_cb_io (EV_P_ ev_io *w, int revents) 3215once_cb_io (EV_P_ ev_io *w, int revents)
2284{ 3216{
2285 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3217 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3218
3219 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2286} 3220}
2287 3221
2288static void 3222static void
2289once_cb_to (EV_P_ ev_timer *w, int revents) 3223once_cb_to (EV_P_ ev_timer *w, int revents)
2290{ 3224{
2291 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3225 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3226
3227 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2292} 3228}
2293 3229
2294void 3230void
2295ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3231ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2296{ 3232{
… …
2318 ev_timer_set (&once->to, timeout, 0.); 3254 ev_timer_set (&once->to, timeout, 0.);
2319 ev_timer_start (EV_A_ &once->to); 3255 ev_timer_start (EV_A_ &once->to);
2320 } 3256 }
2321} 3257}
2322 3258
3259/*****************************************************************************/
3260
3261#if EV_WALK_ENABLE
3262void
3263ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3264{
3265 int i, j;
3266 ev_watcher_list *wl, *wn;
3267
3268 if (types & (EV_IO | EV_EMBED))
3269 for (i = 0; i < anfdmax; ++i)
3270 for (wl = anfds [i].head; wl; )
3271 {
3272 wn = wl->next;
3273
3274#if EV_EMBED_ENABLE
3275 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3276 {
3277 if (types & EV_EMBED)
3278 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3279 }
3280 else
3281#endif
3282#if EV_USE_INOTIFY
3283 if (ev_cb ((ev_io *)wl) == infy_cb)
3284 ;
3285 else
3286#endif
3287 if ((ev_io *)wl != &pipe_w)
3288 if (types & EV_IO)
3289 cb (EV_A_ EV_IO, wl);
3290
3291 wl = wn;
3292 }
3293
3294 if (types & (EV_TIMER | EV_STAT))
3295 for (i = timercnt + HEAP0; i-- > HEAP0; )
3296#if EV_STAT_ENABLE
3297 /*TODO: timer is not always active*/
3298 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3299 {
3300 if (types & EV_STAT)
3301 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3302 }
3303 else
3304#endif
3305 if (types & EV_TIMER)
3306 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3307
3308#if EV_PERIODIC_ENABLE
3309 if (types & EV_PERIODIC)
3310 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3311 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3312#endif
3313
3314#if EV_IDLE_ENABLE
3315 if (types & EV_IDLE)
3316 for (j = NUMPRI; i--; )
3317 for (i = idlecnt [j]; i--; )
3318 cb (EV_A_ EV_IDLE, idles [j][i]);
3319#endif
3320
3321#if EV_FORK_ENABLE
3322 if (types & EV_FORK)
3323 for (i = forkcnt; i--; )
3324 if (ev_cb (forks [i]) != embed_fork_cb)
3325 cb (EV_A_ EV_FORK, forks [i]);
3326#endif
3327
3328#if EV_ASYNC_ENABLE
3329 if (types & EV_ASYNC)
3330 for (i = asynccnt; i--; )
3331 cb (EV_A_ EV_ASYNC, asyncs [i]);
3332#endif
3333
3334 if (types & EV_PREPARE)
3335 for (i = preparecnt; i--; )
3336#if EV_EMBED_ENABLE
3337 if (ev_cb (prepares [i]) != embed_prepare_cb)
3338#endif
3339 cb (EV_A_ EV_PREPARE, prepares [i]);
3340
3341 if (types & EV_CHECK)
3342 for (i = checkcnt; i--; )
3343 cb (EV_A_ EV_CHECK, checks [i]);
3344
3345 if (types & EV_SIGNAL)
3346 for (i = 0; i < signalmax; ++i)
3347 for (wl = signals [i].head; wl; )
3348 {
3349 wn = wl->next;
3350 cb (EV_A_ EV_SIGNAL, wl);
3351 wl = wn;
3352 }
3353
3354 if (types & EV_CHILD)
3355 for (i = EV_PID_HASHSIZE; i--; )
3356 for (wl = childs [i]; wl; )
3357 {
3358 wn = wl->next;
3359 cb (EV_A_ EV_CHILD, wl);
3360 wl = wn;
3361 }
3362/* EV_STAT 0x00001000 /* stat data changed */
3363/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3364}
3365#endif
3366
3367#if EV_MULTIPLICITY
3368 #include "ev_wrap.h"
3369#endif
3370
2323#ifdef __cplusplus 3371#ifdef __cplusplus
2324} 3372}
2325#endif 3373#endif
2326 3374

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