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Comparing libev/ev.c (file contents):
Revision 1.193 by root, Sat Dec 22 05:47:58 2007 UTC vs.
Revision 1.294 by root, Wed Jul 8 02:46:05 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
… …
110# else 133# else
111# define EV_USE_INOTIFY 0 134# define EV_USE_INOTIFY 0
112# endif 135# endif
113# endif 136# endif
114 137
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
115#endif 146#endif
116 147
117#include <math.h> 148#include <math.h>
118#include <stdlib.h> 149#include <stdlib.h>
119#include <fcntl.h> 150#include <fcntl.h>
… …
137#ifndef _WIN32 168#ifndef _WIN32
138# include <sys/time.h> 169# include <sys/time.h>
139# include <sys/wait.h> 170# include <sys/wait.h>
140# include <unistd.h> 171# include <unistd.h>
141#else 172#else
173# include <io.h>
142# define WIN32_LEAN_AND_MEAN 174# define WIN32_LEAN_AND_MEAN
143# include <windows.h> 175# include <windows.h>
144# ifndef EV_SELECT_IS_WINSOCKET 176# ifndef EV_SELECT_IS_WINSOCKET
145# define EV_SELECT_IS_WINSOCKET 1 177# define EV_SELECT_IS_WINSOCKET 1
146# endif 178# endif
147#endif 179#endif
148 180
149/**/ 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
150 190
151#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
152# define EV_USE_MONOTONIC 0 195# define EV_USE_MONOTONIC 0
196# endif
153#endif 197#endif
154 198
155#ifndef EV_USE_REALTIME 199#ifndef EV_USE_REALTIME
156# define EV_USE_REALTIME 0 200# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
157#endif 201#endif
158 202
159#ifndef EV_USE_NANOSLEEP 203#ifndef EV_USE_NANOSLEEP
204# if _POSIX_C_SOURCE >= 199309L
205# define EV_USE_NANOSLEEP 1
206# else
160# define EV_USE_NANOSLEEP 0 207# define EV_USE_NANOSLEEP 0
208# endif
161#endif 209#endif
162 210
163#ifndef EV_USE_SELECT 211#ifndef EV_USE_SELECT
164# define EV_USE_SELECT 1 212# define EV_USE_SELECT 1
165#endif 213#endif
… …
171# define EV_USE_POLL 1 219# define EV_USE_POLL 1
172# endif 220# endif
173#endif 221#endif
174 222
175#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
176# define EV_USE_EPOLL 0 227# define EV_USE_EPOLL 0
228# endif
177#endif 229#endif
178 230
179#ifndef EV_USE_KQUEUE 231#ifndef EV_USE_KQUEUE
180# define EV_USE_KQUEUE 0 232# define EV_USE_KQUEUE 0
181#endif 233#endif
… …
183#ifndef EV_USE_PORT 235#ifndef EV_USE_PORT
184# define EV_USE_PORT 0 236# define EV_USE_PORT 0
185#endif 237#endif
186 238
187#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
188# define EV_USE_INOTIFY 0 243# define EV_USE_INOTIFY 0
244# endif
189#endif 245#endif
190 246
191#ifndef EV_PID_HASHSIZE 247#ifndef EV_PID_HASHSIZE
192# if EV_MINIMAL 248# if EV_MINIMAL
193# define EV_PID_HASHSIZE 1 249# define EV_PID_HASHSIZE 1
… …
202# else 258# else
203# define EV_INOTIFY_HASHSIZE 16 259# define EV_INOTIFY_HASHSIZE 16
204# endif 260# endif
205#endif 261#endif
206 262
207/**/ 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 */
208 304
209#ifndef CLOCK_MONOTONIC 305#ifndef CLOCK_MONOTONIC
210# undef EV_USE_MONOTONIC 306# undef EV_USE_MONOTONIC
211# define EV_USE_MONOTONIC 0 307# define EV_USE_MONOTONIC 0
212#endif 308#endif
… …
226# include <sys/select.h> 322# include <sys/select.h>
227# endif 323# endif
228#endif 324#endif
229 325
230#if EV_USE_INOTIFY 326#if EV_USE_INOTIFY
327# include <sys/utsname.h>
328# include <sys/statfs.h>
231# 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
232#endif 335#endif
233 336
234#if EV_SELECT_IS_WINSOCKET 337#if EV_SELECT_IS_WINSOCKET
235# include <winsock.h> 338# include <winsock.h>
236#endif 339#endif
237 340
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
238/**/ 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
239 360
240/* 361/*
241 * This is used to avoid floating point rounding problems. 362 * This is used to avoid floating point rounding problems.
242 * It is added to ev_rt_now when scheduling periodics 363 * It is added to ev_rt_now when scheduling periodics
243 * to ensure progress, time-wise, even when rounding 364 * to ensure progress, time-wise, even when rounding
… …
255# define expect(expr,value) __builtin_expect ((expr),(value)) 376# define expect(expr,value) __builtin_expect ((expr),(value))
256# define noinline __attribute__ ((noinline)) 377# define noinline __attribute__ ((noinline))
257#else 378#else
258# define expect(expr,value) (expr) 379# define expect(expr,value) (expr)
259# define noinline 380# define noinline
260# if __STDC_VERSION__ < 199901L 381# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
261# define inline 382# define inline
262# endif 383# endif
263#endif 384#endif
264 385
265#define expect_false(expr) expect ((expr) != 0, 0) 386#define expect_false(expr) expect ((expr) != 0, 0)
… …
280 401
281typedef ev_watcher *W; 402typedef ev_watcher *W;
282typedef ev_watcher_list *WL; 403typedef ev_watcher_list *WL;
283typedef ev_watcher_time *WT; 404typedef ev_watcher_time *WT;
284 405
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
285static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 416static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
417#endif
286 418
287#ifdef _WIN32 419#ifdef _WIN32
288# include "ev_win32.c" 420# include "ev_win32.c"
289#endif 421#endif
290 422
… …
297{ 429{
298 syserr_cb = cb; 430 syserr_cb = cb;
299} 431}
300 432
301static void noinline 433static void noinline
302syserr (const char *msg) 434ev_syserr (const char *msg)
303{ 435{
304 if (!msg) 436 if (!msg)
305 msg = "(libev) system error"; 437 msg = "(libev) system error";
306 438
307 if (syserr_cb) 439 if (syserr_cb)
… …
311 perror (msg); 443 perror (msg);
312 abort (); 444 abort ();
313 } 445 }
314} 446}
315 447
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
316static void *(*alloc)(void *ptr, long size); 463static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
317 464
318void 465void
319ev_set_allocator (void *(*cb)(void *ptr, long size)) 466ev_set_allocator (void *(*cb)(void *ptr, long size))
320{ 467{
321 alloc = cb; 468 alloc = cb;
322} 469}
323 470
324inline_speed void * 471inline_speed void *
325ev_realloc (void *ptr, long size) 472ev_realloc (void *ptr, long size)
326{ 473{
327 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 474 ptr = alloc (ptr, size);
328 475
329 if (!ptr && size) 476 if (!ptr && size)
330 { 477 {
331 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 478 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
332 abort (); 479 abort ();
… …
338#define ev_malloc(size) ev_realloc (0, (size)) 485#define ev_malloc(size) ev_realloc (0, (size))
339#define ev_free(ptr) ev_realloc ((ptr), 0) 486#define ev_free(ptr) ev_realloc ((ptr), 0)
340 487
341/*****************************************************************************/ 488/*****************************************************************************/
342 489
490/* file descriptor info structure */
343typedef struct 491typedef struct
344{ 492{
345 WL head; 493 WL head;
346 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 */
347 unsigned char reify; 497 unsigned char unused;
498#if EV_USE_EPOLL
499 unsigned int egen; /* generation counter to counter epoll bugs */
500#endif
348#if EV_SELECT_IS_WINSOCKET 501#if EV_SELECT_IS_WINSOCKET
349 SOCKET handle; 502 SOCKET handle;
350#endif 503#endif
351} ANFD; 504} ANFD;
352 505
506/* stores the pending event set for a given watcher */
353typedef struct 507typedef struct
354{ 508{
355 W w; 509 W w;
356 int events; 510 int events; /* the pending event set for the given watcher */
357} ANPENDING; 511} ANPENDING;
358 512
359#if EV_USE_INOTIFY 513#if EV_USE_INOTIFY
514/* hash table entry per inotify-id */
360typedef struct 515typedef struct
361{ 516{
362 WL head; 517 WL head;
363} 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)
364#endif 539#endif
365 540
366#if EV_MULTIPLICITY 541#if EV_MULTIPLICITY
367 542
368 struct ev_loop 543 struct ev_loop
… …
389 564
390#endif 565#endif
391 566
392/*****************************************************************************/ 567/*****************************************************************************/
393 568
569#ifndef EV_HAVE_EV_TIME
394ev_tstamp 570ev_tstamp
395ev_time (void) 571ev_time (void)
396{ 572{
397#if EV_USE_REALTIME 573#if EV_USE_REALTIME
574 if (expect_true (have_realtime))
575 {
398 struct timespec ts; 576 struct timespec ts;
399 clock_gettime (CLOCK_REALTIME, &ts); 577 clock_gettime (CLOCK_REALTIME, &ts);
400 return ts.tv_sec + ts.tv_nsec * 1e-9; 578 return ts.tv_sec + ts.tv_nsec * 1e-9;
401#else 579 }
580#endif
581
402 struct timeval tv; 582 struct timeval tv;
403 gettimeofday (&tv, 0); 583 gettimeofday (&tv, 0);
404 return tv.tv_sec + tv.tv_usec * 1e-6; 584 return tv.tv_sec + tv.tv_usec * 1e-6;
405#endif
406} 585}
586#endif
407 587
408ev_tstamp inline_size 588inline_size ev_tstamp
409get_clock (void) 589get_clock (void)
410{ 590{
411#if EV_USE_MONOTONIC 591#if EV_USE_MONOTONIC
412 if (expect_true (have_monotonic)) 592 if (expect_true (have_monotonic))
413 { 593 {
… …
439 ts.tv_sec = (time_t)delay; 619 ts.tv_sec = (time_t)delay;
440 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9); 620 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
441 621
442 nanosleep (&ts, 0); 622 nanosleep (&ts, 0);
443#elif defined(_WIN32) 623#elif defined(_WIN32)
444 Sleep (delay * 1e3); 624 Sleep ((unsigned long)(delay * 1e3));
445#else 625#else
446 struct timeval tv; 626 struct timeval tv;
447 627
448 tv.tv_sec = (time_t)delay; 628 tv.tv_sec = (time_t)delay;
449 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 629 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
450 630
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 */
451 select (0, 0, 0, 0, &tv); 634 select (0, 0, 0, 0, &tv);
452#endif 635#endif
453 } 636 }
454} 637}
455 638
456/*****************************************************************************/ 639/*****************************************************************************/
457 640
458int inline_size 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
459array_nextsize (int elem, int cur, int cnt) 646array_nextsize (int elem, int cur, int cnt)
460{ 647{
461 int ncur = cur + 1; 648 int ncur = cur + 1;
462 649
463 do 650 do
464 ncur <<= 1; 651 ncur <<= 1;
465 while (cnt > ncur); 652 while (cnt > ncur);
466 653
467 /* 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 */
468 if (elem * ncur > 4096) 655 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
469 { 656 {
470 ncur *= elem; 657 ncur *= elem;
471 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 658 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
472 ncur = ncur - sizeof (void *) * 4; 659 ncur = ncur - sizeof (void *) * 4;
473 ncur /= elem; 660 ncur /= elem;
474 } 661 }
475 662
476 return ncur; 663 return ncur;
… …
480array_realloc (int elem, void *base, int *cur, int cnt) 667array_realloc (int elem, void *base, int *cur, int cnt)
481{ 668{
482 *cur = array_nextsize (elem, *cur, cnt); 669 *cur = array_nextsize (elem, *cur, cnt);
483 return ev_realloc (base, elem * *cur); 670 return ev_realloc (base, elem * *cur);
484} 671}
672
673#define array_init_zero(base,count) \
674 memset ((void *)(base), 0, sizeof (*(base)) * (count))
485 675
486#define array_needsize(type,base,cur,cnt,init) \ 676#define array_needsize(type,base,cur,cnt,init) \
487 if (expect_false ((cnt) > (cur))) \ 677 if (expect_false ((cnt) > (cur))) \
488 { \ 678 { \
489 int ocur_ = (cur); \ 679 int ocur_ = (cur); \
… …
501 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 691 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
502 } 692 }
503#endif 693#endif
504 694
505#define array_free(stem, idx) \ 695#define array_free(stem, idx) \
506 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
507 697
508/*****************************************************************************/ 698/*****************************************************************************/
699
700/* dummy callback for pending events */
701static void noinline
702pendingcb (EV_P_ ev_prepare *w, int revents)
703{
704}
509 705
510void noinline 706void noinline
511ev_feed_event (EV_P_ void *w, int revents) 707ev_feed_event (EV_P_ void *w, int revents)
512{ 708{
513 W w_ = (W)w; 709 W w_ = (W)w;
… …
522 pendings [pri][w_->pending - 1].w = w_; 718 pendings [pri][w_->pending - 1].w = w_;
523 pendings [pri][w_->pending - 1].events = revents; 719 pendings [pri][w_->pending - 1].events = revents;
524 } 720 }
525} 721}
526 722
527void 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
528queue_events (EV_P_ W *events, int eventcnt, int type) 739queue_events (EV_P_ W *events, int eventcnt, int type)
529{ 740{
530 int i; 741 int i;
531 742
532 for (i = 0; i < eventcnt; ++i) 743 for (i = 0; i < eventcnt; ++i)
533 ev_feed_event (EV_A_ events [i], type); 744 ev_feed_event (EV_A_ events [i], type);
534} 745}
535 746
536/*****************************************************************************/ 747/*****************************************************************************/
537 748
538void inline_size 749inline_speed void
539anfds_init (ANFD *base, int count)
540{
541 while (count--)
542 {
543 base->head = 0;
544 base->events = EV_NONE;
545 base->reify = 0;
546
547 ++base;
548 }
549}
550
551void inline_speed
552fd_event (EV_P_ int fd, int revents) 750fd_event (EV_P_ int fd, int revents)
553{ 751{
554 ANFD *anfd = anfds + fd; 752 ANFD *anfd = anfds + fd;
555 ev_io *w; 753 ev_io *w;
556 754
… …
568{ 766{
569 if (fd >= 0 && fd < anfdmax) 767 if (fd >= 0 && fd < anfdmax)
570 fd_event (EV_A_ fd, revents); 768 fd_event (EV_A_ fd, revents);
571} 769}
572 770
573void inline_size 771/* make sure the external fd watch events are in-sync */
772/* with the kernel/libev internal state */
773inline_size void
574fd_reify (EV_P) 774fd_reify (EV_P)
575{ 775{
576 int i; 776 int i;
577 777
578 for (i = 0; i < fdchangecnt; ++i) 778 for (i = 0; i < fdchangecnt; ++i)
… …
587 events |= (unsigned char)w->events; 787 events |= (unsigned char)w->events;
588 788
589#if EV_SELECT_IS_WINSOCKET 789#if EV_SELECT_IS_WINSOCKET
590 if (events) 790 if (events)
591 { 791 {
592 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
593 anfd->handle = _get_osfhandle (fd); 796 anfd->handle = _get_osfhandle (fd);
797 #endif
594 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));
595 } 799 }
596#endif 800#endif
597 801
598 { 802 {
599 unsigned char o_events = anfd->events; 803 unsigned char o_events = anfd->events;
600 unsigned char o_reify = anfd->reify; 804 unsigned char o_reify = anfd->reify;
601 805
602 anfd->reify = 0; 806 anfd->reify = 0;
603 anfd->events = events; 807 anfd->events = events;
604 808
605 if (o_events != events || o_reify & EV_IOFDSET) 809 if (o_events != events || o_reify & EV__IOFDSET)
606 backend_modify (EV_A_ fd, o_events, events); 810 backend_modify (EV_A_ fd, o_events, events);
607 } 811 }
608 } 812 }
609 813
610 fdchangecnt = 0; 814 fdchangecnt = 0;
611} 815}
612 816
613void inline_size 817/* something about the given fd changed */
818inline_size void
614fd_change (EV_P_ int fd, int flags) 819fd_change (EV_P_ int fd, int flags)
615{ 820{
616 unsigned char reify = anfds [fd].reify; 821 unsigned char reify = anfds [fd].reify;
617 anfds [fd].reify |= flags; 822 anfds [fd].reify |= flags;
618 823
… …
622 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 827 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
623 fdchanges [fdchangecnt - 1] = fd; 828 fdchanges [fdchangecnt - 1] = fd;
624 } 829 }
625} 830}
626 831
627void inline_speed 832/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
833inline_speed void
628fd_kill (EV_P_ int fd) 834fd_kill (EV_P_ int fd)
629{ 835{
630 ev_io *w; 836 ev_io *w;
631 837
632 while ((w = (ev_io *)anfds [fd].head)) 838 while ((w = (ev_io *)anfds [fd].head))
… …
634 ev_io_stop (EV_A_ w); 840 ev_io_stop (EV_A_ w);
635 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);
636 } 842 }
637} 843}
638 844
639int inline_size 845/* check whether the given fd is atcually valid, for error recovery */
846inline_size int
640fd_valid (int fd) 847fd_valid (int fd)
641{ 848{
642#ifdef _WIN32 849#ifdef _WIN32
643 return _get_osfhandle (fd) != -1; 850 return _get_osfhandle (fd) != -1;
644#else 851#else
… …
652{ 859{
653 int fd; 860 int fd;
654 861
655 for (fd = 0; fd < anfdmax; ++fd) 862 for (fd = 0; fd < anfdmax; ++fd)
656 if (anfds [fd].events) 863 if (anfds [fd].events)
657 if (!fd_valid (fd) == -1 && errno == EBADF) 864 if (!fd_valid (fd) && errno == EBADF)
658 fd_kill (EV_A_ fd); 865 fd_kill (EV_A_ fd);
659} 866}
660 867
661/* 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 */
662static void noinline 869static void noinline
… …
680 887
681 for (fd = 0; fd < anfdmax; ++fd) 888 for (fd = 0; fd < anfdmax; ++fd)
682 if (anfds [fd].events) 889 if (anfds [fd].events)
683 { 890 {
684 anfds [fd].events = 0; 891 anfds [fd].events = 0;
892 anfds [fd].emask = 0;
685 fd_change (EV_A_ fd, EV_IOFDSET | 1); 893 fd_change (EV_A_ fd, EV__IOFDSET | 1);
686 } 894 }
687} 895}
688 896
689/*****************************************************************************/ 897/*****************************************************************************/
690 898
691void inline_speed 899/*
692upheap (WT *heap, int k) 900 * the heap functions want a real array index. array index 0 uis guaranteed to not
693{ 901 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
694 WT w = heap [k]; 902 * the branching factor of the d-tree.
903 */
695 904
696 while (k) 905/*
697 { 906 * at the moment we allow libev the luxury of two heaps,
698 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
699 912
700 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
701 break; 947 break;
702 948
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
703 heap [k] = heap [p]; 1011 heap [k] = heap [p];
704 ((W)heap [k])->active = k + 1; 1012 ev_active (ANHE_w (heap [k])) = k;
705 k = p; 1013 k = p;
706 } 1014 }
707 1015
708 heap [k] = w; 1016 heap [k] = he;
709 ((W)heap [k])->active = k + 1; 1017 ev_active (ANHE_w (he)) = k;
710} 1018}
711 1019
712void inline_speed 1020/* move an element suitably so it is in a correct place */
713downheap (WT *heap, int N, int k) 1021inline_size void
714{
715 WT w = heap [k];
716
717 for (;;)
718 {
719 int c = (k << 1) + 1;
720
721 if (c >= N)
722 break;
723
724 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
725 ? 1 : 0;
726
727 if (w->at <= heap [c]->at)
728 break;
729
730 heap [k] = heap [c];
731 ((W)heap [k])->active = k + 1;
732
733 k = c;
734 }
735
736 heap [k] = w;
737 ((W)heap [k])->active = k + 1;
738}
739
740void inline_size
741adjustheap (WT *heap, int N, int k) 1022adjustheap (ANHE *heap, int N, int k)
742{ 1023{
1024 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
743 upheap (heap, k); 1025 upheap (heap, k);
1026 else
744 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);
745} 1040}
746 1041
747/*****************************************************************************/ 1042/*****************************************************************************/
748 1043
1044/* associate signal watchers to a signal signal */
749typedef struct 1045typedef struct
750{ 1046{
751 WL head; 1047 WL head;
752 sig_atomic_t volatile gotsig; 1048 EV_ATOMIC_T gotsig;
753} ANSIG; 1049} ANSIG;
754 1050
755static ANSIG *signals; 1051static ANSIG *signals;
756static int signalmax; 1052static int signalmax;
757 1053
758static int sigpipe [2]; 1054static EV_ATOMIC_T gotsig;
759static sig_atomic_t volatile gotsig;
760static ev_io sigev;
761 1055
762void inline_size 1056/*****************************************************************************/
763signals_init (ANSIG *base, int count)
764{
765 while (count--)
766 {
767 base->head = 0;
768 base->gotsig = 0;
769 1057
770 ++base; 1058/* used to prepare libev internal fd's */
771 } 1059/* this is not fork-safe */
772} 1060inline_speed void
773
774static void
775sighandler (int signum)
776{
777#if _WIN32
778 signal (signum, sighandler);
779#endif
780
781 signals [signum - 1].gotsig = 1;
782
783 if (!gotsig)
784 {
785 int old_errno = errno;
786 gotsig = 1;
787 write (sigpipe [1], &signum, 1);
788 errno = old_errno;
789 }
790}
791
792void noinline
793ev_feed_signal_event (EV_P_ int signum)
794{
795 WL w;
796
797#if EV_MULTIPLICITY
798 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
799#endif
800
801 --signum;
802
803 if (signum < 0 || signum >= signalmax)
804 return;
805
806 signals [signum].gotsig = 0;
807
808 for (w = signals [signum].head; w; w = w->next)
809 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
810}
811
812static void
813sigcb (EV_P_ ev_io *iow, int revents)
814{
815 int signum;
816
817 read (sigpipe [0], &revents, 1);
818 gotsig = 0;
819
820 for (signum = signalmax; signum--; )
821 if (signals [signum].gotsig)
822 ev_feed_signal_event (EV_A_ signum + 1);
823}
824
825void inline_speed
826fd_intern (int fd) 1061fd_intern (int fd)
827{ 1062{
828#ifdef _WIN32 1063#ifdef _WIN32
829 int arg = 1; 1064 unsigned long arg = 1;
830 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1065 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
831#else 1066#else
832 fcntl (fd, F_SETFD, FD_CLOEXEC); 1067 fcntl (fd, F_SETFD, FD_CLOEXEC);
833 fcntl (fd, F_SETFL, O_NONBLOCK); 1068 fcntl (fd, F_SETFL, O_NONBLOCK);
834#endif 1069#endif
835} 1070}
836 1071
837static void noinline 1072static void noinline
838siginit (EV_P) 1073evpipe_init (EV_P)
839{ 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
840 fd_intern (sigpipe [0]); 1090 fd_intern (evpipe [0]);
841 fd_intern (sigpipe [1]); 1091 fd_intern (evpipe [1]);
1092 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1093 }
842 1094
843 ev_io_set (&sigev, sigpipe [0], EV_READ);
844 ev_io_start (EV_A_ &sigev); 1095 ev_io_start (EV_A_ &pipe_w);
845 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
846} 1165}
847 1166
848/*****************************************************************************/ 1167/*****************************************************************************/
849 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
850static WL childs [EV_PID_HASHSIZE]; 1206static WL childs [EV_PID_HASHSIZE];
851 1207
852#ifndef _WIN32 1208#ifndef _WIN32
853 1209
854static ev_signal childev; 1210static ev_signal childev;
855 1211
856void inline_speed 1212#ifndef WIFCONTINUED
1213# define WIFCONTINUED(status) 0
1214#endif
1215
1216/* handle a single child status event */
1217inline_speed void
857child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 1218child_reap (EV_P_ int chain, int pid, int status)
858{ 1219{
859 ev_child *w; 1220 ev_child *w;
1221 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
860 1222
861 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 {
862 if (w->pid == pid || !w->pid) 1225 if ((w->pid == pid || !w->pid)
1226 && (!traced || (w->flags & 1)))
863 { 1227 {
864 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 */
865 w->rpid = pid; 1229 w->rpid = pid;
866 w->rstatus = status; 1230 w->rstatus = status;
867 ev_feed_event (EV_A_ (W)w, EV_CHILD); 1231 ev_feed_event (EV_A_ (W)w, EV_CHILD);
868 } 1232 }
1233 }
869} 1234}
870 1235
871#ifndef WCONTINUED 1236#ifndef WCONTINUED
872# define WCONTINUED 0 1237# define WCONTINUED 0
873#endif 1238#endif
874 1239
1240/* called on sigchld etc., calls waitpid */
875static void 1241static void
876childcb (EV_P_ ev_signal *sw, int revents) 1242childcb (EV_P_ ev_signal *sw, int revents)
877{ 1243{
878 int pid, status; 1244 int pid, status;
879 1245
… …
882 if (!WCONTINUED 1248 if (!WCONTINUED
883 || errno != EINVAL 1249 || errno != EINVAL
884 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 1250 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
885 return; 1251 return;
886 1252
887 /* 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 */
888 /* 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 */
889 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1255 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
890 1256
891 child_reap (EV_A_ sw, pid, pid, status); 1257 child_reap (EV_A_ pid, pid, status);
892 if (EV_PID_HASHSIZE > 1) 1258 if (EV_PID_HASHSIZE > 1)
893 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 */
894} 1260}
895 1261
896#endif 1262#endif
897 1263
898/*****************************************************************************/ 1264/*****************************************************************************/
… …
960 /* kqueue is borked on everything but netbsd apparently */ 1326 /* kqueue is borked on everything but netbsd apparently */
961 /* 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 */
962 flags &= ~EVBACKEND_KQUEUE; 1328 flags &= ~EVBACKEND_KQUEUE;
963#endif 1329#endif
964#ifdef __APPLE__ 1330#ifdef __APPLE__
965 // flags &= ~EVBACKEND_KQUEUE; for documentation 1331 /* only select works correctly on that "unix-certified" platform */
966 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 */
967#endif 1334#endif
968 1335
969 return flags; 1336 return flags;
970} 1337}
971 1338
972unsigned int 1339unsigned int
973ev_embeddable_backends (void) 1340ev_embeddable_backends (void)
974{ 1341{
1342 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1343
975 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 1344 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
976 return EVBACKEND_KQUEUE 1345 /* please fix it and tell me how to detect the fix */
977 | EVBACKEND_PORT; 1346 flags &= ~EVBACKEND_EPOLL;
1347
1348 return flags;
978} 1349}
979 1350
980unsigned int 1351unsigned int
981ev_backend (EV_P) 1352ev_backend (EV_P)
982{ 1353{
… …
987ev_loop_count (EV_P) 1358ev_loop_count (EV_P)
988{ 1359{
989 return loop_count; 1360 return loop_count;
990} 1361}
991 1362
1363unsigned int
1364ev_loop_depth (EV_P)
1365{
1366 return loop_depth;
1367}
1368
992void 1369void
993ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 1370ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
994{ 1371{
995 io_blocktime = interval; 1372 io_blocktime = interval;
996} 1373}
… …
999ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 1376ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1000{ 1377{
1001 timeout_blocktime = interval; 1378 timeout_blocktime = interval;
1002} 1379}
1003 1380
1381/* initialise a loop structure, must be zero-initialised */
1004static void noinline 1382static void noinline
1005loop_init (EV_P_ unsigned int flags) 1383loop_init (EV_P_ unsigned int flags)
1006{ 1384{
1007 if (!backend) 1385 if (!backend)
1008 { 1386 {
1387#if EV_USE_REALTIME
1388 if (!have_realtime)
1389 {
1390 struct timespec ts;
1391
1392 if (!clock_gettime (CLOCK_REALTIME, &ts))
1393 have_realtime = 1;
1394 }
1395#endif
1396
1009#if EV_USE_MONOTONIC 1397#if EV_USE_MONOTONIC
1398 if (!have_monotonic)
1010 { 1399 {
1011 struct timespec ts; 1400 struct timespec ts;
1401
1012 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1402 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1013 have_monotonic = 1; 1403 have_monotonic = 1;
1014 } 1404 }
1015#endif 1405#endif
1016 1406
1017 ev_rt_now = ev_time (); 1407 ev_rt_now = ev_time ();
1018 mn_now = get_clock (); 1408 mn_now = get_clock ();
1019 now_floor = mn_now; 1409 now_floor = mn_now;
1020 rtmn_diff = ev_rt_now - mn_now; 1410 rtmn_diff = ev_rt_now - mn_now;
1021 1411
1022 io_blocktime = 0.; 1412 io_blocktime = 0.;
1023 timeout_blocktime = 0.; 1413 timeout_blocktime = 0.;
1414 backend = 0;
1415 backend_fd = -1;
1416 gotasync = 0;
1417#if EV_USE_INOTIFY
1418 fs_fd = -2;
1419#endif
1024 1420
1025 /* pid check not overridable via env */ 1421 /* pid check not overridable via env */
1026#ifndef _WIN32 1422#ifndef _WIN32
1027 if (flags & EVFLAG_FORKCHECK) 1423 if (flags & EVFLAG_FORKCHECK)
1028 curpid = getpid (); 1424 curpid = getpid ();
… …
1031 if (!(flags & EVFLAG_NOENV) 1427 if (!(flags & EVFLAG_NOENV)
1032 && !enable_secure () 1428 && !enable_secure ()
1033 && getenv ("LIBEV_FLAGS")) 1429 && getenv ("LIBEV_FLAGS"))
1034 flags = atoi (getenv ("LIBEV_FLAGS")); 1430 flags = atoi (getenv ("LIBEV_FLAGS"));
1035 1431
1036 if (!(flags & 0x0000ffffUL)) 1432 if (!(flags & 0x0000ffffU))
1037 flags |= ev_recommended_backends (); 1433 flags |= ev_recommended_backends ();
1038
1039 backend = 0;
1040 backend_fd = -1;
1041#if EV_USE_INOTIFY
1042 fs_fd = -2;
1043#endif
1044 1434
1045#if EV_USE_PORT 1435#if EV_USE_PORT
1046 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1436 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1047#endif 1437#endif
1048#if EV_USE_KQUEUE 1438#if EV_USE_KQUEUE
… …
1056#endif 1446#endif
1057#if EV_USE_SELECT 1447#if EV_USE_SELECT
1058 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1448 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1059#endif 1449#endif
1060 1450
1451 ev_prepare_init (&pending_w, pendingcb);
1452
1061 ev_init (&sigev, sigcb); 1453 ev_init (&pipe_w, pipecb);
1062 ev_set_priority (&sigev, EV_MAXPRI); 1454 ev_set_priority (&pipe_w, EV_MAXPRI);
1063 } 1455 }
1064} 1456}
1065 1457
1458/* free up a loop structure */
1066static void noinline 1459static void noinline
1067loop_destroy (EV_P) 1460loop_destroy (EV_P)
1068{ 1461{
1069 int i; 1462 int i;
1463
1464 if (ev_is_active (&pipe_w))
1465 {
1466 ev_ref (EV_A); /* signal watcher */
1467 ev_io_stop (EV_A_ &pipe_w);
1468
1469#if EV_USE_EVENTFD
1470 if (evfd >= 0)
1471 close (evfd);
1472#endif
1473
1474 if (evpipe [0] >= 0)
1475 {
1476 close (evpipe [0]);
1477 close (evpipe [1]);
1478 }
1479 }
1070 1480
1071#if EV_USE_INOTIFY 1481#if EV_USE_INOTIFY
1072 if (fs_fd >= 0) 1482 if (fs_fd >= 0)
1073 close (fs_fd); 1483 close (fs_fd);
1074#endif 1484#endif
… …
1101 } 1511 }
1102 1512
1103 ev_free (anfds); anfdmax = 0; 1513 ev_free (anfds); anfdmax = 0;
1104 1514
1105 /* have to use the microsoft-never-gets-it-right macro */ 1515 /* have to use the microsoft-never-gets-it-right macro */
1516 array_free (rfeed, EMPTY);
1106 array_free (fdchange, EMPTY); 1517 array_free (fdchange, EMPTY);
1107 array_free (timer, EMPTY); 1518 array_free (timer, EMPTY);
1108#if EV_PERIODIC_ENABLE 1519#if EV_PERIODIC_ENABLE
1109 array_free (periodic, EMPTY); 1520 array_free (periodic, EMPTY);
1110#endif 1521#endif
1111#if EV_FORK_ENABLE 1522#if EV_FORK_ENABLE
1112 array_free (fork, EMPTY); 1523 array_free (fork, EMPTY);
1113#endif 1524#endif
1114 array_free (prepare, EMPTY); 1525 array_free (prepare, EMPTY);
1115 array_free (check, EMPTY); 1526 array_free (check, EMPTY);
1527#if EV_ASYNC_ENABLE
1528 array_free (async, EMPTY);
1529#endif
1116 1530
1117 backend = 0; 1531 backend = 0;
1118} 1532}
1119 1533
1534#if EV_USE_INOTIFY
1120void inline_size infy_fork (EV_P); 1535inline_size void infy_fork (EV_P);
1536#endif
1121 1537
1122void inline_size 1538inline_size void
1123loop_fork (EV_P) 1539loop_fork (EV_P)
1124{ 1540{
1125#if EV_USE_PORT 1541#if EV_USE_PORT
1126 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 1542 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1127#endif 1543#endif
… …
1133#endif 1549#endif
1134#if EV_USE_INOTIFY 1550#if EV_USE_INOTIFY
1135 infy_fork (EV_A); 1551 infy_fork (EV_A);
1136#endif 1552#endif
1137 1553
1138 if (ev_is_active (&sigev)) 1554 if (ev_is_active (&pipe_w))
1139 { 1555 {
1140 /* default loop */ 1556 /* this "locks" the handlers against writing to the pipe */
1557 /* while we modify the fd vars */
1558 gotsig = 1;
1559#if EV_ASYNC_ENABLE
1560 gotasync = 1;
1561#endif
1141 1562
1142 ev_ref (EV_A); 1563 ev_ref (EV_A);
1143 ev_io_stop (EV_A_ &sigev); 1564 ev_io_stop (EV_A_ &pipe_w);
1565
1566#if EV_USE_EVENTFD
1567 if (evfd >= 0)
1568 close (evfd);
1569#endif
1570
1571 if (evpipe [0] >= 0)
1572 {
1144 close (sigpipe [0]); 1573 close (evpipe [0]);
1145 close (sigpipe [1]); 1574 close (evpipe [1]);
1575 }
1146 1576
1147 while (pipe (sigpipe))
1148 syserr ("(libev) error creating pipe");
1149
1150 siginit (EV_A); 1577 evpipe_init (EV_A);
1578 /* now iterate over everything, in case we missed something */
1579 pipecb (EV_A_ &pipe_w, EV_READ);
1151 } 1580 }
1152 1581
1153 postfork = 0; 1582 postfork = 0;
1154} 1583}
1155 1584
1156#if EV_MULTIPLICITY 1585#if EV_MULTIPLICITY
1586
1157struct ev_loop * 1587struct ev_loop *
1158ev_loop_new (unsigned int flags) 1588ev_loop_new (unsigned int flags)
1159{ 1589{
1160 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 1590 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1161 1591
… …
1177} 1607}
1178 1608
1179void 1609void
1180ev_loop_fork (EV_P) 1610ev_loop_fork (EV_P)
1181{ 1611{
1182 postfork = 1; 1612 postfork = 1; /* must be in line with ev_default_fork */
1183} 1613}
1184 1614
1615#if EV_VERIFY
1616static void noinline
1617verify_watcher (EV_P_ W w)
1618{
1619 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1620
1621 if (w->pending)
1622 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1623}
1624
1625static void noinline
1626verify_heap (EV_P_ ANHE *heap, int N)
1627{
1628 int i;
1629
1630 for (i = HEAP0; i < N + HEAP0; ++i)
1631 {
1632 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1633 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1634 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1635
1636 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1637 }
1638}
1639
1640static void noinline
1641array_verify (EV_P_ W *ws, int cnt)
1642{
1643 while (cnt--)
1644 {
1645 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1646 verify_watcher (EV_A_ ws [cnt]);
1647 }
1648}
1649#endif
1650
1651void
1652ev_loop_verify (EV_P)
1653{
1654#if EV_VERIFY
1655 int i;
1656 WL w;
1657
1658 assert (activecnt >= -1);
1659
1660 assert (fdchangemax >= fdchangecnt);
1661 for (i = 0; i < fdchangecnt; ++i)
1662 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1663
1664 assert (anfdmax >= 0);
1665 for (i = 0; i < anfdmax; ++i)
1666 for (w = anfds [i].head; w; w = w->next)
1667 {
1668 verify_watcher (EV_A_ (W)w);
1669 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1670 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1671 }
1672
1673 assert (timermax >= timercnt);
1674 verify_heap (EV_A_ timers, timercnt);
1675
1676#if EV_PERIODIC_ENABLE
1677 assert (periodicmax >= periodiccnt);
1678 verify_heap (EV_A_ periodics, periodiccnt);
1679#endif
1680
1681 for (i = NUMPRI; i--; )
1682 {
1683 assert (pendingmax [i] >= pendingcnt [i]);
1684#if EV_IDLE_ENABLE
1685 assert (idleall >= 0);
1686 assert (idlemax [i] >= idlecnt [i]);
1687 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1688#endif
1689 }
1690
1691#if EV_FORK_ENABLE
1692 assert (forkmax >= forkcnt);
1693 array_verify (EV_A_ (W *)forks, forkcnt);
1694#endif
1695
1696#if EV_ASYNC_ENABLE
1697 assert (asyncmax >= asynccnt);
1698 array_verify (EV_A_ (W *)asyncs, asynccnt);
1699#endif
1700
1701 assert (preparemax >= preparecnt);
1702 array_verify (EV_A_ (W *)prepares, preparecnt);
1703
1704 assert (checkmax >= checkcnt);
1705 array_verify (EV_A_ (W *)checks, checkcnt);
1706
1707# if 0
1708 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1709 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1185#endif 1710# endif
1711#endif
1712}
1713
1714#endif /* multiplicity */
1186 1715
1187#if EV_MULTIPLICITY 1716#if EV_MULTIPLICITY
1188struct ev_loop * 1717struct ev_loop *
1189ev_default_loop_init (unsigned int flags) 1718ev_default_loop_init (unsigned int flags)
1190#else 1719#else
1191int 1720int
1192ev_default_loop (unsigned int flags) 1721ev_default_loop (unsigned int flags)
1193#endif 1722#endif
1194{ 1723{
1195 if (sigpipe [0] == sigpipe [1])
1196 if (pipe (sigpipe))
1197 return 0;
1198
1199 if (!ev_default_loop_ptr) 1724 if (!ev_default_loop_ptr)
1200 { 1725 {
1201#if EV_MULTIPLICITY 1726#if EV_MULTIPLICITY
1202 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1727 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1203#else 1728#else
… …
1206 1731
1207 loop_init (EV_A_ flags); 1732 loop_init (EV_A_ flags);
1208 1733
1209 if (ev_backend (EV_A)) 1734 if (ev_backend (EV_A))
1210 { 1735 {
1211 siginit (EV_A);
1212
1213#ifndef _WIN32 1736#ifndef _WIN32
1214 ev_signal_init (&childev, childcb, SIGCHLD); 1737 ev_signal_init (&childev, childcb, SIGCHLD);
1215 ev_set_priority (&childev, EV_MAXPRI); 1738 ev_set_priority (&childev, EV_MAXPRI);
1216 ev_signal_start (EV_A_ &childev); 1739 ev_signal_start (EV_A_ &childev);
1217 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1740 ev_unref (EV_A); /* child watcher should not keep loop alive */
… …
1229{ 1752{
1230#if EV_MULTIPLICITY 1753#if EV_MULTIPLICITY
1231 struct ev_loop *loop = ev_default_loop_ptr; 1754 struct ev_loop *loop = ev_default_loop_ptr;
1232#endif 1755#endif
1233 1756
1757 ev_default_loop_ptr = 0;
1758
1234#ifndef _WIN32 1759#ifndef _WIN32
1235 ev_ref (EV_A); /* child watcher */ 1760 ev_ref (EV_A); /* child watcher */
1236 ev_signal_stop (EV_A_ &childev); 1761 ev_signal_stop (EV_A_ &childev);
1237#endif 1762#endif
1238 1763
1239 ev_ref (EV_A); /* signal watcher */
1240 ev_io_stop (EV_A_ &sigev);
1241
1242 close (sigpipe [0]); sigpipe [0] = 0;
1243 close (sigpipe [1]); sigpipe [1] = 0;
1244
1245 loop_destroy (EV_A); 1764 loop_destroy (EV_A);
1246} 1765}
1247 1766
1248void 1767void
1249ev_default_fork (void) 1768ev_default_fork (void)
1250{ 1769{
1251#if EV_MULTIPLICITY 1770#if EV_MULTIPLICITY
1252 struct ev_loop *loop = ev_default_loop_ptr; 1771 struct ev_loop *loop = ev_default_loop_ptr;
1253#endif 1772#endif
1254 1773
1255 if (backend) 1774 postfork = 1; /* must be in line with ev_loop_fork */
1256 postfork = 1;
1257} 1775}
1258 1776
1259/*****************************************************************************/ 1777/*****************************************************************************/
1260 1778
1261void 1779void
1262ev_invoke (EV_P_ void *w, int revents) 1780ev_invoke (EV_P_ void *w, int revents)
1263{ 1781{
1264 EV_CB_INVOKE ((W)w, revents); 1782 EV_CB_INVOKE ((W)w, revents);
1265} 1783}
1266 1784
1267void inline_speed 1785inline_speed void
1268call_pending (EV_P) 1786call_pending (EV_P)
1269{ 1787{
1270 int pri; 1788 int pri;
1271 1789
1272 for (pri = NUMPRI; pri--; ) 1790 for (pri = NUMPRI; pri--; )
1273 while (pendingcnt [pri]) 1791 while (pendingcnt [pri])
1274 { 1792 {
1275 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1793 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1276 1794
1277 if (expect_true (p->w))
1278 {
1279 /*assert (("non-pending watcher on pending list", p->w->pending));*/ 1795 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1796 /* ^ this is no longer true, as pending_w could be here */
1280 1797
1281 p->w->pending = 0; 1798 p->w->pending = 0;
1282 EV_CB_INVOKE (p->w, p->events); 1799 EV_CB_INVOKE (p->w, p->events);
1283 } 1800 EV_FREQUENT_CHECK;
1284 } 1801 }
1285} 1802}
1286 1803
1287void inline_size
1288timers_reify (EV_P)
1289{
1290 while (timercnt && ((WT)timers [0])->at <= mn_now)
1291 {
1292 ev_timer *w = (ev_timer *)timers [0];
1293
1294 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1295
1296 /* first reschedule or stop timer */
1297 if (w->repeat)
1298 {
1299 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1300
1301 ((WT)w)->at += w->repeat;
1302 if (((WT)w)->at < mn_now)
1303 ((WT)w)->at = mn_now;
1304
1305 downheap (timers, timercnt, 0);
1306 }
1307 else
1308 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1309
1310 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1311 }
1312}
1313
1314#if EV_PERIODIC_ENABLE
1315void inline_size
1316periodics_reify (EV_P)
1317{
1318 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1319 {
1320 ev_periodic *w = (ev_periodic *)periodics [0];
1321
1322 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1323
1324 /* first reschedule or stop timer */
1325 if (w->reschedule_cb)
1326 {
1327 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1328 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1329 downheap (periodics, periodiccnt, 0);
1330 }
1331 else if (w->interval)
1332 {
1333 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1334 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1335 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1336 downheap (periodics, periodiccnt, 0);
1337 }
1338 else
1339 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1340
1341 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1342 }
1343}
1344
1345static void noinline
1346periodics_reschedule (EV_P)
1347{
1348 int i;
1349
1350 /* adjust periodics after time jump */
1351 for (i = 0; i < periodiccnt; ++i)
1352 {
1353 ev_periodic *w = (ev_periodic *)periodics [i];
1354
1355 if (w->reschedule_cb)
1356 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1357 else if (w->interval)
1358 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1359 }
1360
1361 /* now rebuild the heap */
1362 for (i = periodiccnt >> 1; i--; )
1363 downheap (periodics, periodiccnt, i);
1364}
1365#endif
1366
1367#if EV_IDLE_ENABLE 1804#if EV_IDLE_ENABLE
1368void inline_size 1805/* make idle watchers pending. this handles the "call-idle */
1806/* only when higher priorities are idle" logic */
1807inline_size void
1369idle_reify (EV_P) 1808idle_reify (EV_P)
1370{ 1809{
1371 if (expect_false (idleall)) 1810 if (expect_false (idleall))
1372 { 1811 {
1373 int pri; 1812 int pri;
… …
1385 } 1824 }
1386 } 1825 }
1387} 1826}
1388#endif 1827#endif
1389 1828
1390void inline_speed 1829/* make timers pending */
1830inline_size void
1831timers_reify (EV_P)
1832{
1833 EV_FREQUENT_CHECK;
1834
1835 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1836 {
1837 do
1838 {
1839 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1840
1841 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
1842
1843 /* first reschedule or stop timer */
1844 if (w->repeat)
1845 {
1846 ev_at (w) += w->repeat;
1847 if (ev_at (w) < mn_now)
1848 ev_at (w) = mn_now;
1849
1850 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1851
1852 ANHE_at_cache (timers [HEAP0]);
1853 downheap (timers, timercnt, HEAP0);
1854 }
1855 else
1856 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1857
1858 EV_FREQUENT_CHECK;
1859 feed_reverse (EV_A_ (W)w);
1860 }
1861 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1862
1863 feed_reverse_done (EV_A_ EV_TIMEOUT);
1864 }
1865}
1866
1867#if EV_PERIODIC_ENABLE
1868/* make periodics pending */
1869inline_size void
1870periodics_reify (EV_P)
1871{
1872 EV_FREQUENT_CHECK;
1873
1874 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1875 {
1876 int feed_count = 0;
1877
1878 do
1879 {
1880 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1881
1882 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1883
1884 /* first reschedule or stop timer */
1885 if (w->reschedule_cb)
1886 {
1887 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1888
1889 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1890
1891 ANHE_at_cache (periodics [HEAP0]);
1892 downheap (periodics, periodiccnt, HEAP0);
1893 }
1894 else if (w->interval)
1895 {
1896 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1897 /* if next trigger time is not sufficiently in the future, put it there */
1898 /* this might happen because of floating point inexactness */
1899 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1900 {
1901 ev_at (w) += w->interval;
1902
1903 /* if interval is unreasonably low we might still have a time in the past */
1904 /* so correct this. this will make the periodic very inexact, but the user */
1905 /* has effectively asked to get triggered more often than possible */
1906 if (ev_at (w) < ev_rt_now)
1907 ev_at (w) = ev_rt_now;
1908 }
1909
1910 ANHE_at_cache (periodics [HEAP0]);
1911 downheap (periodics, periodiccnt, HEAP0);
1912 }
1913 else
1914 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1915
1916 EV_FREQUENT_CHECK;
1917 feed_reverse (EV_A_ (W)w);
1918 }
1919 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1920
1921 feed_reverse_done (EV_A_ EV_PERIODIC);
1922 }
1923}
1924
1925/* simply recalculate all periodics */
1926/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1927static void noinline
1928periodics_reschedule (EV_P)
1929{
1930 int i;
1931
1932 /* adjust periodics after time jump */
1933 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1934 {
1935 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1936
1937 if (w->reschedule_cb)
1938 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1939 else if (w->interval)
1940 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1941
1942 ANHE_at_cache (periodics [i]);
1943 }
1944
1945 reheap (periodics, periodiccnt);
1946}
1947#endif
1948
1949/* adjust all timers by a given offset */
1950static void noinline
1951timers_reschedule (EV_P_ ev_tstamp adjust)
1952{
1953 int i;
1954
1955 for (i = 0; i < timercnt; ++i)
1956 {
1957 ANHE *he = timers + i + HEAP0;
1958 ANHE_w (*he)->at += adjust;
1959 ANHE_at_cache (*he);
1960 }
1961}
1962
1963/* fetch new monotonic and realtime times from the kernel */
1964/* also detetc if there was a timejump, and act accordingly */
1965inline_speed void
1391time_update (EV_P_ ev_tstamp max_block) 1966time_update (EV_P_ ev_tstamp max_block)
1392{ 1967{
1393 int i;
1394
1395#if EV_USE_MONOTONIC 1968#if EV_USE_MONOTONIC
1396 if (expect_true (have_monotonic)) 1969 if (expect_true (have_monotonic))
1397 { 1970 {
1971 int i;
1398 ev_tstamp odiff = rtmn_diff; 1972 ev_tstamp odiff = rtmn_diff;
1399 1973
1400 mn_now = get_clock (); 1974 mn_now = get_clock ();
1401 1975
1402 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 1976 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1420 */ 1994 */
1421 for (i = 4; --i; ) 1995 for (i = 4; --i; )
1422 { 1996 {
1423 rtmn_diff = ev_rt_now - mn_now; 1997 rtmn_diff = ev_rt_now - mn_now;
1424 1998
1425 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 1999 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1426 return; /* all is well */ 2000 return; /* all is well */
1427 2001
1428 ev_rt_now = ev_time (); 2002 ev_rt_now = ev_time ();
1429 mn_now = get_clock (); 2003 mn_now = get_clock ();
1430 now_floor = mn_now; 2004 now_floor = mn_now;
1431 } 2005 }
1432 2006
2007 /* no timer adjustment, as the monotonic clock doesn't jump */
2008 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1433# if EV_PERIODIC_ENABLE 2009# if EV_PERIODIC_ENABLE
1434 periodics_reschedule (EV_A); 2010 periodics_reschedule (EV_A);
1435# endif 2011# endif
1436 /* no timer adjustment, as the monotonic clock doesn't jump */
1437 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1438 } 2012 }
1439 else 2013 else
1440#endif 2014#endif
1441 { 2015 {
1442 ev_rt_now = ev_time (); 2016 ev_rt_now = ev_time ();
1443 2017
1444 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 2018 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1445 { 2019 {
2020 /* adjust timers. this is easy, as the offset is the same for all of them */
2021 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1446#if EV_PERIODIC_ENABLE 2022#if EV_PERIODIC_ENABLE
1447 periodics_reschedule (EV_A); 2023 periodics_reschedule (EV_A);
1448#endif 2024#endif
1449 /* adjust timers. this is easy, as the offset is the same for all of them */
1450 for (i = 0; i < timercnt; ++i)
1451 ((WT)timers [i])->at += ev_rt_now - mn_now;
1452 } 2025 }
1453 2026
1454 mn_now = ev_rt_now; 2027 mn_now = ev_rt_now;
1455 } 2028 }
1456} 2029}
1457 2030
1458void 2031void
1459ev_ref (EV_P)
1460{
1461 ++activecnt;
1462}
1463
1464void
1465ev_unref (EV_P)
1466{
1467 --activecnt;
1468}
1469
1470static int loop_done;
1471
1472void
1473ev_loop (EV_P_ int flags) 2032ev_loop (EV_P_ int flags)
1474{ 2033{
1475 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2034 ++loop_depth;
1476 ? EVUNLOOP_ONE 2035
1477 : EVUNLOOP_CANCEL; 2036 loop_done = EVUNLOOP_CANCEL;
1478 2037
1479 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2038 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1480 2039
1481 do 2040 do
1482 { 2041 {
2042#if EV_VERIFY >= 2
2043 ev_loop_verify (EV_A);
2044#endif
2045
1483#ifndef _WIN32 2046#ifndef _WIN32
1484 if (expect_false (curpid)) /* penalise the forking check even more */ 2047 if (expect_false (curpid)) /* penalise the forking check even more */
1485 if (expect_false (getpid () != curpid)) 2048 if (expect_false (getpid () != curpid))
1486 { 2049 {
1487 curpid = getpid (); 2050 curpid = getpid ();
… …
1504 { 2067 {
1505 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2068 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1506 call_pending (EV_A); 2069 call_pending (EV_A);
1507 } 2070 }
1508 2071
1509 if (expect_false (!activecnt))
1510 break;
1511
1512 /* we might have forked, so reify kernel state if necessary */ 2072 /* we might have forked, so reify kernel state if necessary */
1513 if (expect_false (postfork)) 2073 if (expect_false (postfork))
1514 loop_fork (EV_A); 2074 loop_fork (EV_A);
1515 2075
1516 /* update fd-related kernel structures */ 2076 /* update fd-related kernel structures */
… …
1521 ev_tstamp waittime = 0.; 2081 ev_tstamp waittime = 0.;
1522 ev_tstamp sleeptime = 0.; 2082 ev_tstamp sleeptime = 0.;
1523 2083
1524 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 2084 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1525 { 2085 {
2086 /* remember old timestamp for io_blocktime calculation */
2087 ev_tstamp prev_mn_now = mn_now;
2088
1526 /* update time to cancel out callback processing overhead */ 2089 /* update time to cancel out callback processing overhead */
1527 time_update (EV_A_ 1e100); 2090 time_update (EV_A_ 1e100);
1528 2091
1529 waittime = MAX_BLOCKTIME; 2092 waittime = MAX_BLOCKTIME;
1530 2093
1531 if (timercnt) 2094 if (timercnt)
1532 { 2095 {
1533 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 2096 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1534 if (waittime > to) waittime = to; 2097 if (waittime > to) waittime = to;
1535 } 2098 }
1536 2099
1537#if EV_PERIODIC_ENABLE 2100#if EV_PERIODIC_ENABLE
1538 if (periodiccnt) 2101 if (periodiccnt)
1539 { 2102 {
1540 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 2103 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1541 if (waittime > to) waittime = to; 2104 if (waittime > to) waittime = to;
1542 } 2105 }
1543#endif 2106#endif
1544 2107
2108 /* don't let timeouts decrease the waittime below timeout_blocktime */
1545 if (expect_false (waittime < timeout_blocktime)) 2109 if (expect_false (waittime < timeout_blocktime))
1546 waittime = timeout_blocktime; 2110 waittime = timeout_blocktime;
1547 2111
1548 sleeptime = waittime - backend_fudge; 2112 /* extra check because io_blocktime is commonly 0 */
1549
1550 if (expect_true (sleeptime > io_blocktime)) 2113 if (expect_false (io_blocktime))
1551 sleeptime = io_blocktime;
1552
1553 if (sleeptime)
1554 { 2114 {
2115 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2116
2117 if (sleeptime > waittime - backend_fudge)
2118 sleeptime = waittime - backend_fudge;
2119
2120 if (expect_true (sleeptime > 0.))
2121 {
1555 ev_sleep (sleeptime); 2122 ev_sleep (sleeptime);
1556 waittime -= sleeptime; 2123 waittime -= sleeptime;
2124 }
1557 } 2125 }
1558 } 2126 }
1559 2127
1560 ++loop_count; 2128 ++loop_count;
1561 backend_poll (EV_A_ waittime); 2129 backend_poll (EV_A_ waittime);
… …
1578 /* queue check watchers, to be executed first */ 2146 /* queue check watchers, to be executed first */
1579 if (expect_false (checkcnt)) 2147 if (expect_false (checkcnt))
1580 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2148 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1581 2149
1582 call_pending (EV_A); 2150 call_pending (EV_A);
1583
1584 } 2151 }
1585 while (expect_true (activecnt && !loop_done)); 2152 while (expect_true (
2153 activecnt
2154 && !loop_done
2155 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2156 ));
1586 2157
1587 if (loop_done == EVUNLOOP_ONE) 2158 if (loop_done == EVUNLOOP_ONE)
1588 loop_done = EVUNLOOP_CANCEL; 2159 loop_done = EVUNLOOP_CANCEL;
2160
2161 --loop_depth;
1589} 2162}
1590 2163
1591void 2164void
1592ev_unloop (EV_P_ int how) 2165ev_unloop (EV_P_ int how)
1593{ 2166{
1594 loop_done = how; 2167 loop_done = how;
1595} 2168}
1596 2169
2170void
2171ev_ref (EV_P)
2172{
2173 ++activecnt;
2174}
2175
2176void
2177ev_unref (EV_P)
2178{
2179 --activecnt;
2180}
2181
2182void
2183ev_now_update (EV_P)
2184{
2185 time_update (EV_A_ 1e100);
2186}
2187
2188void
2189ev_suspend (EV_P)
2190{
2191 ev_now_update (EV_A);
2192}
2193
2194void
2195ev_resume (EV_P)
2196{
2197 ev_tstamp mn_prev = mn_now;
2198
2199 ev_now_update (EV_A);
2200 timers_reschedule (EV_A_ mn_now - mn_prev);
2201#if EV_PERIODIC_ENABLE
2202 /* TODO: really do this? */
2203 periodics_reschedule (EV_A);
2204#endif
2205}
2206
1597/*****************************************************************************/ 2207/*****************************************************************************/
2208/* singly-linked list management, used when the expected list length is short */
1598 2209
1599void inline_size 2210inline_size void
1600wlist_add (WL *head, WL elem) 2211wlist_add (WL *head, WL elem)
1601{ 2212{
1602 elem->next = *head; 2213 elem->next = *head;
1603 *head = elem; 2214 *head = elem;
1604} 2215}
1605 2216
1606void inline_size 2217inline_size void
1607wlist_del (WL *head, WL elem) 2218wlist_del (WL *head, WL elem)
1608{ 2219{
1609 while (*head) 2220 while (*head)
1610 { 2221 {
1611 if (*head == elem) 2222 if (*head == elem)
… …
1616 2227
1617 head = &(*head)->next; 2228 head = &(*head)->next;
1618 } 2229 }
1619} 2230}
1620 2231
1621void inline_speed 2232/* internal, faster, version of ev_clear_pending */
2233inline_speed void
1622clear_pending (EV_P_ W w) 2234clear_pending (EV_P_ W w)
1623{ 2235{
1624 if (w->pending) 2236 if (w->pending)
1625 { 2237 {
1626 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2238 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1627 w->pending = 0; 2239 w->pending = 0;
1628 } 2240 }
1629} 2241}
1630 2242
1631int 2243int
… …
1635 int pending = w_->pending; 2247 int pending = w_->pending;
1636 2248
1637 if (expect_true (pending)) 2249 if (expect_true (pending))
1638 { 2250 {
1639 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 2251 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2252 p->w = (W)&pending_w;
1640 w_->pending = 0; 2253 w_->pending = 0;
1641 p->w = 0;
1642 return p->events; 2254 return p->events;
1643 } 2255 }
1644 else 2256 else
1645 return 0; 2257 return 0;
1646} 2258}
1647 2259
1648void inline_size 2260inline_size void
1649pri_adjust (EV_P_ W w) 2261pri_adjust (EV_P_ W w)
1650{ 2262{
1651 int pri = w->priority; 2263 int pri = w->priority;
1652 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 2264 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1653 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 2265 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1654 w->priority = pri; 2266 w->priority = pri;
1655} 2267}
1656 2268
1657void inline_speed 2269inline_speed void
1658ev_start (EV_P_ W w, int active) 2270ev_start (EV_P_ W w, int active)
1659{ 2271{
1660 pri_adjust (EV_A_ w); 2272 pri_adjust (EV_A_ w);
1661 w->active = active; 2273 w->active = active;
1662 ev_ref (EV_A); 2274 ev_ref (EV_A);
1663} 2275}
1664 2276
1665void inline_size 2277inline_size void
1666ev_stop (EV_P_ W w) 2278ev_stop (EV_P_ W w)
1667{ 2279{
1668 ev_unref (EV_A); 2280 ev_unref (EV_A);
1669 w->active = 0; 2281 w->active = 0;
1670} 2282}
… …
1677 int fd = w->fd; 2289 int fd = w->fd;
1678 2290
1679 if (expect_false (ev_is_active (w))) 2291 if (expect_false (ev_is_active (w)))
1680 return; 2292 return;
1681 2293
1682 assert (("ev_io_start called with negative fd", fd >= 0)); 2294 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2295 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2296
2297 EV_FREQUENT_CHECK;
1683 2298
1684 ev_start (EV_A_ (W)w, 1); 2299 ev_start (EV_A_ (W)w, 1);
1685 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2300 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1686 wlist_add (&anfds[fd].head, (WL)w); 2301 wlist_add (&anfds[fd].head, (WL)w);
1687 2302
1688 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 2303 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
1689 w->events &= ~EV_IOFDSET; 2304 w->events &= ~EV__IOFDSET;
2305
2306 EV_FREQUENT_CHECK;
1690} 2307}
1691 2308
1692void noinline 2309void noinline
1693ev_io_stop (EV_P_ ev_io *w) 2310ev_io_stop (EV_P_ ev_io *w)
1694{ 2311{
1695 clear_pending (EV_A_ (W)w); 2312 clear_pending (EV_A_ (W)w);
1696 if (expect_false (!ev_is_active (w))) 2313 if (expect_false (!ev_is_active (w)))
1697 return; 2314 return;
1698 2315
1699 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2316 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2317
2318 EV_FREQUENT_CHECK;
1700 2319
1701 wlist_del (&anfds[w->fd].head, (WL)w); 2320 wlist_del (&anfds[w->fd].head, (WL)w);
1702 ev_stop (EV_A_ (W)w); 2321 ev_stop (EV_A_ (W)w);
1703 2322
1704 fd_change (EV_A_ w->fd, 1); 2323 fd_change (EV_A_ w->fd, 1);
2324
2325 EV_FREQUENT_CHECK;
1705} 2326}
1706 2327
1707void noinline 2328void noinline
1708ev_timer_start (EV_P_ ev_timer *w) 2329ev_timer_start (EV_P_ ev_timer *w)
1709{ 2330{
1710 if (expect_false (ev_is_active (w))) 2331 if (expect_false (ev_is_active (w)))
1711 return; 2332 return;
1712 2333
1713 ((WT)w)->at += mn_now; 2334 ev_at (w) += mn_now;
1714 2335
1715 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2336 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1716 2337
2338 EV_FREQUENT_CHECK;
2339
2340 ++timercnt;
1717 ev_start (EV_A_ (W)w, ++timercnt); 2341 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1718 array_needsize (WT, timers, timermax, timercnt, EMPTY2); 2342 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1719 timers [timercnt - 1] = (WT)w; 2343 ANHE_w (timers [ev_active (w)]) = (WT)w;
1720 upheap (timers, timercnt - 1); 2344 ANHE_at_cache (timers [ev_active (w)]);
2345 upheap (timers, ev_active (w));
1721 2346
2347 EV_FREQUENT_CHECK;
2348
1722 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 2349 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1723} 2350}
1724 2351
1725void noinline 2352void noinline
1726ev_timer_stop (EV_P_ ev_timer *w) 2353ev_timer_stop (EV_P_ ev_timer *w)
1727{ 2354{
1728 clear_pending (EV_A_ (W)w); 2355 clear_pending (EV_A_ (W)w);
1729 if (expect_false (!ev_is_active (w))) 2356 if (expect_false (!ev_is_active (w)))
1730 return; 2357 return;
1731 2358
1732 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w)); 2359 EV_FREQUENT_CHECK;
1733 2360
1734 { 2361 {
1735 int active = ((W)w)->active; 2362 int active = ev_active (w);
1736 2363
2364 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2365
2366 --timercnt;
2367
1737 if (expect_true (--active < --timercnt)) 2368 if (expect_true (active < timercnt + HEAP0))
1738 { 2369 {
1739 timers [active] = timers [timercnt]; 2370 timers [active] = timers [timercnt + HEAP0];
1740 adjustheap (timers, timercnt, active); 2371 adjustheap (timers, timercnt, active);
1741 } 2372 }
1742 } 2373 }
1743 2374
1744 ((WT)w)->at -= mn_now; 2375 EV_FREQUENT_CHECK;
2376
2377 ev_at (w) -= mn_now;
1745 2378
1746 ev_stop (EV_A_ (W)w); 2379 ev_stop (EV_A_ (W)w);
1747} 2380}
1748 2381
1749void noinline 2382void noinline
1750ev_timer_again (EV_P_ ev_timer *w) 2383ev_timer_again (EV_P_ ev_timer *w)
1751{ 2384{
2385 EV_FREQUENT_CHECK;
2386
1752 if (ev_is_active (w)) 2387 if (ev_is_active (w))
1753 { 2388 {
1754 if (w->repeat) 2389 if (w->repeat)
1755 { 2390 {
1756 ((WT)w)->at = mn_now + w->repeat; 2391 ev_at (w) = mn_now + w->repeat;
2392 ANHE_at_cache (timers [ev_active (w)]);
1757 adjustheap (timers, timercnt, ((W)w)->active - 1); 2393 adjustheap (timers, timercnt, ev_active (w));
1758 } 2394 }
1759 else 2395 else
1760 ev_timer_stop (EV_A_ w); 2396 ev_timer_stop (EV_A_ w);
1761 } 2397 }
1762 else if (w->repeat) 2398 else if (w->repeat)
1763 { 2399 {
1764 w->at = w->repeat; 2400 ev_at (w) = w->repeat;
1765 ev_timer_start (EV_A_ w); 2401 ev_timer_start (EV_A_ w);
1766 } 2402 }
2403
2404 EV_FREQUENT_CHECK;
1767} 2405}
1768 2406
1769#if EV_PERIODIC_ENABLE 2407#if EV_PERIODIC_ENABLE
1770void noinline 2408void noinline
1771ev_periodic_start (EV_P_ ev_periodic *w) 2409ev_periodic_start (EV_P_ ev_periodic *w)
1772{ 2410{
1773 if (expect_false (ev_is_active (w))) 2411 if (expect_false (ev_is_active (w)))
1774 return; 2412 return;
1775 2413
1776 if (w->reschedule_cb) 2414 if (w->reschedule_cb)
1777 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2415 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1778 else if (w->interval) 2416 else if (w->interval)
1779 { 2417 {
1780 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2418 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1781 /* this formula differs from the one in periodic_reify because we do not always round up */ 2419 /* this formula differs from the one in periodic_reify because we do not always round up */
1782 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2420 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1783 } 2421 }
1784 else 2422 else
1785 ((WT)w)->at = w->offset; 2423 ev_at (w) = w->offset;
1786 2424
2425 EV_FREQUENT_CHECK;
2426
2427 ++periodiccnt;
1787 ev_start (EV_A_ (W)w, ++periodiccnt); 2428 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1788 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2); 2429 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1789 periodics [periodiccnt - 1] = (WT)w; 2430 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1790 upheap (periodics, periodiccnt - 1); 2431 ANHE_at_cache (periodics [ev_active (w)]);
2432 upheap (periodics, ev_active (w));
1791 2433
2434 EV_FREQUENT_CHECK;
2435
1792 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 2436 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1793} 2437}
1794 2438
1795void noinline 2439void noinline
1796ev_periodic_stop (EV_P_ ev_periodic *w) 2440ev_periodic_stop (EV_P_ ev_periodic *w)
1797{ 2441{
1798 clear_pending (EV_A_ (W)w); 2442 clear_pending (EV_A_ (W)w);
1799 if (expect_false (!ev_is_active (w))) 2443 if (expect_false (!ev_is_active (w)))
1800 return; 2444 return;
1801 2445
1802 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w)); 2446 EV_FREQUENT_CHECK;
1803 2447
1804 { 2448 {
1805 int active = ((W)w)->active; 2449 int active = ev_active (w);
1806 2450
2451 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2452
2453 --periodiccnt;
2454
1807 if (expect_true (--active < --periodiccnt)) 2455 if (expect_true (active < periodiccnt + HEAP0))
1808 { 2456 {
1809 periodics [active] = periodics [periodiccnt]; 2457 periodics [active] = periodics [periodiccnt + HEAP0];
1810 adjustheap (periodics, periodiccnt, active); 2458 adjustheap (periodics, periodiccnt, active);
1811 } 2459 }
1812 } 2460 }
1813 2461
2462 EV_FREQUENT_CHECK;
2463
1814 ev_stop (EV_A_ (W)w); 2464 ev_stop (EV_A_ (W)w);
1815} 2465}
1816 2466
1817void noinline 2467void noinline
1818ev_periodic_again (EV_P_ ev_periodic *w) 2468ev_periodic_again (EV_P_ ev_periodic *w)
… …
1829 2479
1830void noinline 2480void noinline
1831ev_signal_start (EV_P_ ev_signal *w) 2481ev_signal_start (EV_P_ ev_signal *w)
1832{ 2482{
1833#if EV_MULTIPLICITY 2483#if EV_MULTIPLICITY
1834 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 2484 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1835#endif 2485#endif
1836 if (expect_false (ev_is_active (w))) 2486 if (expect_false (ev_is_active (w)))
1837 return; 2487 return;
1838 2488
1839 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2489 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2490
2491 evpipe_init (EV_A);
2492
2493 EV_FREQUENT_CHECK;
1840 2494
1841 { 2495 {
1842#ifndef _WIN32 2496#ifndef _WIN32
1843 sigset_t full, prev; 2497 sigset_t full, prev;
1844 sigfillset (&full); 2498 sigfillset (&full);
1845 sigprocmask (SIG_SETMASK, &full, &prev); 2499 sigprocmask (SIG_SETMASK, &full, &prev);
1846#endif 2500#endif
1847 2501
1848 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 2502 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
1849 2503
1850#ifndef _WIN32 2504#ifndef _WIN32
1851 sigprocmask (SIG_SETMASK, &prev, 0); 2505 sigprocmask (SIG_SETMASK, &prev, 0);
1852#endif 2506#endif
1853 } 2507 }
… …
1856 wlist_add (&signals [w->signum - 1].head, (WL)w); 2510 wlist_add (&signals [w->signum - 1].head, (WL)w);
1857 2511
1858 if (!((WL)w)->next) 2512 if (!((WL)w)->next)
1859 { 2513 {
1860#if _WIN32 2514#if _WIN32
1861 signal (w->signum, sighandler); 2515 signal (w->signum, ev_sighandler);
1862#else 2516#else
1863 struct sigaction sa; 2517 struct sigaction sa;
1864 sa.sa_handler = sighandler; 2518 sa.sa_handler = ev_sighandler;
1865 sigfillset (&sa.sa_mask); 2519 sigfillset (&sa.sa_mask);
1866 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2520 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1867 sigaction (w->signum, &sa, 0); 2521 sigaction (w->signum, &sa, 0);
1868#endif 2522#endif
1869 } 2523 }
2524
2525 EV_FREQUENT_CHECK;
1870} 2526}
1871 2527
1872void noinline 2528void noinline
1873ev_signal_stop (EV_P_ ev_signal *w) 2529ev_signal_stop (EV_P_ ev_signal *w)
1874{ 2530{
1875 clear_pending (EV_A_ (W)w); 2531 clear_pending (EV_A_ (W)w);
1876 if (expect_false (!ev_is_active (w))) 2532 if (expect_false (!ev_is_active (w)))
1877 return; 2533 return;
1878 2534
2535 EV_FREQUENT_CHECK;
2536
1879 wlist_del (&signals [w->signum - 1].head, (WL)w); 2537 wlist_del (&signals [w->signum - 1].head, (WL)w);
1880 ev_stop (EV_A_ (W)w); 2538 ev_stop (EV_A_ (W)w);
1881 2539
1882 if (!signals [w->signum - 1].head) 2540 if (!signals [w->signum - 1].head)
1883 signal (w->signum, SIG_DFL); 2541 signal (w->signum, SIG_DFL);
2542
2543 EV_FREQUENT_CHECK;
1884} 2544}
1885 2545
1886void 2546void
1887ev_child_start (EV_P_ ev_child *w) 2547ev_child_start (EV_P_ ev_child *w)
1888{ 2548{
1889#if EV_MULTIPLICITY 2549#if EV_MULTIPLICITY
1890 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 2550 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1891#endif 2551#endif
1892 if (expect_false (ev_is_active (w))) 2552 if (expect_false (ev_is_active (w)))
1893 return; 2553 return;
1894 2554
2555 EV_FREQUENT_CHECK;
2556
1895 ev_start (EV_A_ (W)w, 1); 2557 ev_start (EV_A_ (W)w, 1);
1896 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 2558 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2559
2560 EV_FREQUENT_CHECK;
1897} 2561}
1898 2562
1899void 2563void
1900ev_child_stop (EV_P_ ev_child *w) 2564ev_child_stop (EV_P_ ev_child *w)
1901{ 2565{
1902 clear_pending (EV_A_ (W)w); 2566 clear_pending (EV_A_ (W)w);
1903 if (expect_false (!ev_is_active (w))) 2567 if (expect_false (!ev_is_active (w)))
1904 return; 2568 return;
1905 2569
2570 EV_FREQUENT_CHECK;
2571
1906 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 2572 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1907 ev_stop (EV_A_ (W)w); 2573 ev_stop (EV_A_ (W)w);
2574
2575 EV_FREQUENT_CHECK;
1908} 2576}
1909 2577
1910#if EV_STAT_ENABLE 2578#if EV_STAT_ENABLE
1911 2579
1912# ifdef _WIN32 2580# ifdef _WIN32
1913# undef lstat 2581# undef lstat
1914# define lstat(a,b) _stati64 (a,b) 2582# define lstat(a,b) _stati64 (a,b)
1915# endif 2583# endif
1916 2584
1917#define DEF_STAT_INTERVAL 5.0074891 2585#define DEF_STAT_INTERVAL 5.0074891
2586#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1918#define MIN_STAT_INTERVAL 0.1074891 2587#define MIN_STAT_INTERVAL 0.1074891
1919 2588
1920static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 2589static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1921 2590
1922#if EV_USE_INOTIFY 2591#if EV_USE_INOTIFY
1923# define EV_INOTIFY_BUFSIZE 8192 2592# define EV_INOTIFY_BUFSIZE 8192
… …
1927{ 2596{
1928 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); 2597 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);
1929 2598
1930 if (w->wd < 0) 2599 if (w->wd < 0)
1931 { 2600 {
2601 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1932 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 2602 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1933 2603
1934 /* monitor some parent directory for speedup hints */ 2604 /* monitor some parent directory for speedup hints */
2605 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2606 /* but an efficiency issue only */
1935 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 2607 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1936 { 2608 {
1937 char path [4096]; 2609 char path [4096];
1938 strcpy (path, w->path); 2610 strcpy (path, w->path);
1939 2611
… …
1942 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 2614 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1943 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 2615 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1944 2616
1945 char *pend = strrchr (path, '/'); 2617 char *pend = strrchr (path, '/');
1946 2618
1947 if (!pend) 2619 if (!pend || pend == path)
1948 break; /* whoops, no '/', complain to your admin */ 2620 break;
1949 2621
1950 *pend = 0; 2622 *pend = 0;
1951 w->wd = inotify_add_watch (fs_fd, path, mask); 2623 w->wd = inotify_add_watch (fs_fd, path, mask);
1952 } 2624 }
1953 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 2625 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1954 } 2626 }
1955 } 2627 }
1956 else
1957 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1958 2628
1959 if (w->wd >= 0) 2629 if (w->wd >= 0)
2630 {
1960 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 2631 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2632
2633 /* now local changes will be tracked by inotify, but remote changes won't */
2634 /* unless the filesystem it known to be local, we therefore still poll */
2635 /* also do poll on <2.6.25, but with normal frequency */
2636 struct statfs sfs;
2637
2638 if (fs_2625 && !statfs (w->path, &sfs))
2639 if (sfs.f_type == 0x1373 /* devfs */
2640 || sfs.f_type == 0xEF53 /* ext2/3 */
2641 || sfs.f_type == 0x3153464a /* jfs */
2642 || sfs.f_type == 0x52654973 /* reiser3 */
2643 || sfs.f_type == 0x01021994 /* tempfs */
2644 || sfs.f_type == 0x58465342 /* xfs */)
2645 return;
2646
2647 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2648 ev_timer_again (EV_A_ &w->timer);
2649 }
1961} 2650}
1962 2651
1963static void noinline 2652static void noinline
1964infy_del (EV_P_ ev_stat *w) 2653infy_del (EV_P_ ev_stat *w)
1965{ 2654{
… …
1979 2668
1980static void noinline 2669static void noinline
1981infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 2670infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1982{ 2671{
1983 if (slot < 0) 2672 if (slot < 0)
1984 /* overflow, need to check for all hahs slots */ 2673 /* overflow, need to check for all hash slots */
1985 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 2674 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
1986 infy_wd (EV_A_ slot, wd, ev); 2675 infy_wd (EV_A_ slot, wd, ev);
1987 else 2676 else
1988 { 2677 {
1989 WL w_; 2678 WL w_;
… …
1995 2684
1996 if (w->wd == wd || wd == -1) 2685 if (w->wd == wd || wd == -1)
1997 { 2686 {
1998 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 2687 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1999 { 2688 {
2689 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2000 w->wd = -1; 2690 w->wd = -1;
2001 infy_add (EV_A_ w); /* re-add, no matter what */ 2691 infy_add (EV_A_ w); /* re-add, no matter what */
2002 } 2692 }
2003 2693
2004 stat_timer_cb (EV_A_ &w->timer, 0); 2694 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2017 2707
2018 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 2708 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
2019 infy_wd (EV_A_ ev->wd, ev->wd, ev); 2709 infy_wd (EV_A_ ev->wd, ev->wd, ev);
2020} 2710}
2021 2711
2022void inline_size 2712inline_size void
2713check_2625 (EV_P)
2714{
2715 /* kernels < 2.6.25 are borked
2716 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2717 */
2718 struct utsname buf;
2719 int major, minor, micro;
2720
2721 if (uname (&buf))
2722 return;
2723
2724 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2725 return;
2726
2727 if (major < 2
2728 || (major == 2 && minor < 6)
2729 || (major == 2 && minor == 6 && micro < 25))
2730 return;
2731
2732 fs_2625 = 1;
2733}
2734
2735inline_size void
2023infy_init (EV_P) 2736infy_init (EV_P)
2024{ 2737{
2025 if (fs_fd != -2) 2738 if (fs_fd != -2)
2026 return; 2739 return;
2740
2741 fs_fd = -1;
2742
2743 check_2625 (EV_A);
2027 2744
2028 fs_fd = inotify_init (); 2745 fs_fd = inotify_init ();
2029 2746
2030 if (fs_fd >= 0) 2747 if (fs_fd >= 0)
2031 { 2748 {
… …
2033 ev_set_priority (&fs_w, EV_MAXPRI); 2750 ev_set_priority (&fs_w, EV_MAXPRI);
2034 ev_io_start (EV_A_ &fs_w); 2751 ev_io_start (EV_A_ &fs_w);
2035 } 2752 }
2036} 2753}
2037 2754
2038void inline_size 2755inline_size void
2039infy_fork (EV_P) 2756infy_fork (EV_P)
2040{ 2757{
2041 int slot; 2758 int slot;
2042 2759
2043 if (fs_fd < 0) 2760 if (fs_fd < 0)
… …
2059 w->wd = -1; 2776 w->wd = -1;
2060 2777
2061 if (fs_fd >= 0) 2778 if (fs_fd >= 0)
2062 infy_add (EV_A_ w); /* re-add, no matter what */ 2779 infy_add (EV_A_ w); /* re-add, no matter what */
2063 else 2780 else
2064 ev_timer_start (EV_A_ &w->timer); 2781 ev_timer_again (EV_A_ &w->timer);
2065 } 2782 }
2066
2067 } 2783 }
2068} 2784}
2069 2785
2786#endif
2787
2788#ifdef _WIN32
2789# define EV_LSTAT(p,b) _stati64 (p, b)
2790#else
2791# define EV_LSTAT(p,b) lstat (p, b)
2070#endif 2792#endif
2071 2793
2072void 2794void
2073ev_stat_stat (EV_P_ ev_stat *w) 2795ev_stat_stat (EV_P_ ev_stat *w)
2074{ 2796{
… …
2101 || w->prev.st_atime != w->attr.st_atime 2823 || w->prev.st_atime != w->attr.st_atime
2102 || w->prev.st_mtime != w->attr.st_mtime 2824 || w->prev.st_mtime != w->attr.st_mtime
2103 || w->prev.st_ctime != w->attr.st_ctime 2825 || w->prev.st_ctime != w->attr.st_ctime
2104 ) { 2826 ) {
2105 #if EV_USE_INOTIFY 2827 #if EV_USE_INOTIFY
2828 if (fs_fd >= 0)
2829 {
2106 infy_del (EV_A_ w); 2830 infy_del (EV_A_ w);
2107 infy_add (EV_A_ w); 2831 infy_add (EV_A_ w);
2108 ev_stat_stat (EV_A_ w); /* avoid race... */ 2832 ev_stat_stat (EV_A_ w); /* avoid race... */
2833 }
2109 #endif 2834 #endif
2110 2835
2111 ev_feed_event (EV_A_ w, EV_STAT); 2836 ev_feed_event (EV_A_ w, EV_STAT);
2112 } 2837 }
2113} 2838}
… …
2116ev_stat_start (EV_P_ ev_stat *w) 2841ev_stat_start (EV_P_ ev_stat *w)
2117{ 2842{
2118 if (expect_false (ev_is_active (w))) 2843 if (expect_false (ev_is_active (w)))
2119 return; 2844 return;
2120 2845
2121 /* since we use memcmp, we need to clear any padding data etc. */
2122 memset (&w->prev, 0, sizeof (ev_statdata));
2123 memset (&w->attr, 0, sizeof (ev_statdata));
2124
2125 ev_stat_stat (EV_A_ w); 2846 ev_stat_stat (EV_A_ w);
2126 2847
2848 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2127 if (w->interval < MIN_STAT_INTERVAL) 2849 w->interval = MIN_STAT_INTERVAL;
2128 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2129 2850
2130 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 2851 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2131 ev_set_priority (&w->timer, ev_priority (w)); 2852 ev_set_priority (&w->timer, ev_priority (w));
2132 2853
2133#if EV_USE_INOTIFY 2854#if EV_USE_INOTIFY
2134 infy_init (EV_A); 2855 infy_init (EV_A);
2135 2856
2136 if (fs_fd >= 0) 2857 if (fs_fd >= 0)
2137 infy_add (EV_A_ w); 2858 infy_add (EV_A_ w);
2138 else 2859 else
2139#endif 2860#endif
2140 ev_timer_start (EV_A_ &w->timer); 2861 ev_timer_again (EV_A_ &w->timer);
2141 2862
2142 ev_start (EV_A_ (W)w, 1); 2863 ev_start (EV_A_ (W)w, 1);
2864
2865 EV_FREQUENT_CHECK;
2143} 2866}
2144 2867
2145void 2868void
2146ev_stat_stop (EV_P_ ev_stat *w) 2869ev_stat_stop (EV_P_ ev_stat *w)
2147{ 2870{
2148 clear_pending (EV_A_ (W)w); 2871 clear_pending (EV_A_ (W)w);
2149 if (expect_false (!ev_is_active (w))) 2872 if (expect_false (!ev_is_active (w)))
2150 return; 2873 return;
2151 2874
2875 EV_FREQUENT_CHECK;
2876
2152#if EV_USE_INOTIFY 2877#if EV_USE_INOTIFY
2153 infy_del (EV_A_ w); 2878 infy_del (EV_A_ w);
2154#endif 2879#endif
2155 ev_timer_stop (EV_A_ &w->timer); 2880 ev_timer_stop (EV_A_ &w->timer);
2156 2881
2157 ev_stop (EV_A_ (W)w); 2882 ev_stop (EV_A_ (W)w);
2883
2884 EV_FREQUENT_CHECK;
2158} 2885}
2159#endif 2886#endif
2160 2887
2161#if EV_IDLE_ENABLE 2888#if EV_IDLE_ENABLE
2162void 2889void
… …
2164{ 2891{
2165 if (expect_false (ev_is_active (w))) 2892 if (expect_false (ev_is_active (w)))
2166 return; 2893 return;
2167 2894
2168 pri_adjust (EV_A_ (W)w); 2895 pri_adjust (EV_A_ (W)w);
2896
2897 EV_FREQUENT_CHECK;
2169 2898
2170 { 2899 {
2171 int active = ++idlecnt [ABSPRI (w)]; 2900 int active = ++idlecnt [ABSPRI (w)];
2172 2901
2173 ++idleall; 2902 ++idleall;
2174 ev_start (EV_A_ (W)w, active); 2903 ev_start (EV_A_ (W)w, active);
2175 2904
2176 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 2905 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2177 idles [ABSPRI (w)][active - 1] = w; 2906 idles [ABSPRI (w)][active - 1] = w;
2178 } 2907 }
2908
2909 EV_FREQUENT_CHECK;
2179} 2910}
2180 2911
2181void 2912void
2182ev_idle_stop (EV_P_ ev_idle *w) 2913ev_idle_stop (EV_P_ ev_idle *w)
2183{ 2914{
2184 clear_pending (EV_A_ (W)w); 2915 clear_pending (EV_A_ (W)w);
2185 if (expect_false (!ev_is_active (w))) 2916 if (expect_false (!ev_is_active (w)))
2186 return; 2917 return;
2187 2918
2919 EV_FREQUENT_CHECK;
2920
2188 { 2921 {
2189 int active = ((W)w)->active; 2922 int active = ev_active (w);
2190 2923
2191 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 2924 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2192 ((W)idles [ABSPRI (w)][active - 1])->active = active; 2925 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2193 2926
2194 ev_stop (EV_A_ (W)w); 2927 ev_stop (EV_A_ (W)w);
2195 --idleall; 2928 --idleall;
2196 } 2929 }
2930
2931 EV_FREQUENT_CHECK;
2197} 2932}
2198#endif 2933#endif
2199 2934
2200void 2935void
2201ev_prepare_start (EV_P_ ev_prepare *w) 2936ev_prepare_start (EV_P_ ev_prepare *w)
2202{ 2937{
2203 if (expect_false (ev_is_active (w))) 2938 if (expect_false (ev_is_active (w)))
2204 return; 2939 return;
2940
2941 EV_FREQUENT_CHECK;
2205 2942
2206 ev_start (EV_A_ (W)w, ++preparecnt); 2943 ev_start (EV_A_ (W)w, ++preparecnt);
2207 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 2944 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2208 prepares [preparecnt - 1] = w; 2945 prepares [preparecnt - 1] = w;
2946
2947 EV_FREQUENT_CHECK;
2209} 2948}
2210 2949
2211void 2950void
2212ev_prepare_stop (EV_P_ ev_prepare *w) 2951ev_prepare_stop (EV_P_ ev_prepare *w)
2213{ 2952{
2214 clear_pending (EV_A_ (W)w); 2953 clear_pending (EV_A_ (W)w);
2215 if (expect_false (!ev_is_active (w))) 2954 if (expect_false (!ev_is_active (w)))
2216 return; 2955 return;
2217 2956
2957 EV_FREQUENT_CHECK;
2958
2218 { 2959 {
2219 int active = ((W)w)->active; 2960 int active = ev_active (w);
2961
2220 prepares [active - 1] = prepares [--preparecnt]; 2962 prepares [active - 1] = prepares [--preparecnt];
2221 ((W)prepares [active - 1])->active = active; 2963 ev_active (prepares [active - 1]) = active;
2222 } 2964 }
2223 2965
2224 ev_stop (EV_A_ (W)w); 2966 ev_stop (EV_A_ (W)w);
2967
2968 EV_FREQUENT_CHECK;
2225} 2969}
2226 2970
2227void 2971void
2228ev_check_start (EV_P_ ev_check *w) 2972ev_check_start (EV_P_ ev_check *w)
2229{ 2973{
2230 if (expect_false (ev_is_active (w))) 2974 if (expect_false (ev_is_active (w)))
2231 return; 2975 return;
2976
2977 EV_FREQUENT_CHECK;
2232 2978
2233 ev_start (EV_A_ (W)w, ++checkcnt); 2979 ev_start (EV_A_ (W)w, ++checkcnt);
2234 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 2980 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2235 checks [checkcnt - 1] = w; 2981 checks [checkcnt - 1] = w;
2982
2983 EV_FREQUENT_CHECK;
2236} 2984}
2237 2985
2238void 2986void
2239ev_check_stop (EV_P_ ev_check *w) 2987ev_check_stop (EV_P_ ev_check *w)
2240{ 2988{
2241 clear_pending (EV_A_ (W)w); 2989 clear_pending (EV_A_ (W)w);
2242 if (expect_false (!ev_is_active (w))) 2990 if (expect_false (!ev_is_active (w)))
2243 return; 2991 return;
2244 2992
2993 EV_FREQUENT_CHECK;
2994
2245 { 2995 {
2246 int active = ((W)w)->active; 2996 int active = ev_active (w);
2997
2247 checks [active - 1] = checks [--checkcnt]; 2998 checks [active - 1] = checks [--checkcnt];
2248 ((W)checks [active - 1])->active = active; 2999 ev_active (checks [active - 1]) = active;
2249 } 3000 }
2250 3001
2251 ev_stop (EV_A_ (W)w); 3002 ev_stop (EV_A_ (W)w);
3003
3004 EV_FREQUENT_CHECK;
2252} 3005}
2253 3006
2254#if EV_EMBED_ENABLE 3007#if EV_EMBED_ENABLE
2255void noinline 3008void noinline
2256ev_embed_sweep (EV_P_ ev_embed *w) 3009ev_embed_sweep (EV_P_ ev_embed *w)
… …
2264 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3017 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2265 3018
2266 if (ev_cb (w)) 3019 if (ev_cb (w))
2267 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3020 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2268 else 3021 else
2269 ev_embed_sweep (loop, w); 3022 ev_loop (w->other, EVLOOP_NONBLOCK);
2270} 3023}
2271 3024
2272static void 3025static void
2273embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 3026embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2274{ 3027{
2275 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 3028 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2276 3029
2277 fd_reify (w->other); 3030 {
3031 struct ev_loop *loop = w->other;
3032
3033 while (fdchangecnt)
3034 {
3035 fd_reify (EV_A);
3036 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3037 }
3038 }
2278} 3039}
3040
3041static void
3042embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3043{
3044 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3045
3046 ev_embed_stop (EV_A_ w);
3047
3048 {
3049 struct ev_loop *loop = w->other;
3050
3051 ev_loop_fork (EV_A);
3052 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3053 }
3054
3055 ev_embed_start (EV_A_ w);
3056}
3057
3058#if 0
3059static void
3060embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3061{
3062 ev_idle_stop (EV_A_ idle);
3063}
3064#endif
2279 3065
2280void 3066void
2281ev_embed_start (EV_P_ ev_embed *w) 3067ev_embed_start (EV_P_ ev_embed *w)
2282{ 3068{
2283 if (expect_false (ev_is_active (w))) 3069 if (expect_false (ev_is_active (w)))
2284 return; 3070 return;
2285 3071
2286 { 3072 {
2287 struct ev_loop *loop = w->other; 3073 struct ev_loop *loop = w->other;
2288 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 3074 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2289 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 3075 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2290 } 3076 }
3077
3078 EV_FREQUENT_CHECK;
2291 3079
2292 ev_set_priority (&w->io, ev_priority (w)); 3080 ev_set_priority (&w->io, ev_priority (w));
2293 ev_io_start (EV_A_ &w->io); 3081 ev_io_start (EV_A_ &w->io);
2294 3082
2295 ev_prepare_init (&w->prepare, embed_prepare_cb); 3083 ev_prepare_init (&w->prepare, embed_prepare_cb);
2296 ev_set_priority (&w->prepare, EV_MINPRI); 3084 ev_set_priority (&w->prepare, EV_MINPRI);
2297 ev_prepare_start (EV_A_ &w->prepare); 3085 ev_prepare_start (EV_A_ &w->prepare);
2298 3086
3087 ev_fork_init (&w->fork, embed_fork_cb);
3088 ev_fork_start (EV_A_ &w->fork);
3089
3090 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3091
2299 ev_start (EV_A_ (W)w, 1); 3092 ev_start (EV_A_ (W)w, 1);
3093
3094 EV_FREQUENT_CHECK;
2300} 3095}
2301 3096
2302void 3097void
2303ev_embed_stop (EV_P_ ev_embed *w) 3098ev_embed_stop (EV_P_ ev_embed *w)
2304{ 3099{
2305 clear_pending (EV_A_ (W)w); 3100 clear_pending (EV_A_ (W)w);
2306 if (expect_false (!ev_is_active (w))) 3101 if (expect_false (!ev_is_active (w)))
2307 return; 3102 return;
2308 3103
3104 EV_FREQUENT_CHECK;
3105
2309 ev_io_stop (EV_A_ &w->io); 3106 ev_io_stop (EV_A_ &w->io);
2310 ev_prepare_stop (EV_A_ &w->prepare); 3107 ev_prepare_stop (EV_A_ &w->prepare);
3108 ev_fork_stop (EV_A_ &w->fork);
2311 3109
2312 ev_stop (EV_A_ (W)w); 3110 EV_FREQUENT_CHECK;
2313} 3111}
2314#endif 3112#endif
2315 3113
2316#if EV_FORK_ENABLE 3114#if EV_FORK_ENABLE
2317void 3115void
2318ev_fork_start (EV_P_ ev_fork *w) 3116ev_fork_start (EV_P_ ev_fork *w)
2319{ 3117{
2320 if (expect_false (ev_is_active (w))) 3118 if (expect_false (ev_is_active (w)))
2321 return; 3119 return;
3120
3121 EV_FREQUENT_CHECK;
2322 3122
2323 ev_start (EV_A_ (W)w, ++forkcnt); 3123 ev_start (EV_A_ (W)w, ++forkcnt);
2324 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 3124 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2325 forks [forkcnt - 1] = w; 3125 forks [forkcnt - 1] = w;
3126
3127 EV_FREQUENT_CHECK;
2326} 3128}
2327 3129
2328void 3130void
2329ev_fork_stop (EV_P_ ev_fork *w) 3131ev_fork_stop (EV_P_ ev_fork *w)
2330{ 3132{
2331 clear_pending (EV_A_ (W)w); 3133 clear_pending (EV_A_ (W)w);
2332 if (expect_false (!ev_is_active (w))) 3134 if (expect_false (!ev_is_active (w)))
2333 return; 3135 return;
2334 3136
3137 EV_FREQUENT_CHECK;
3138
2335 { 3139 {
2336 int active = ((W)w)->active; 3140 int active = ev_active (w);
3141
2337 forks [active - 1] = forks [--forkcnt]; 3142 forks [active - 1] = forks [--forkcnt];
2338 ((W)forks [active - 1])->active = active; 3143 ev_active (forks [active - 1]) = active;
2339 } 3144 }
2340 3145
2341 ev_stop (EV_A_ (W)w); 3146 ev_stop (EV_A_ (W)w);
3147
3148 EV_FREQUENT_CHECK;
3149}
3150#endif
3151
3152#if EV_ASYNC_ENABLE
3153void
3154ev_async_start (EV_P_ ev_async *w)
3155{
3156 if (expect_false (ev_is_active (w)))
3157 return;
3158
3159 evpipe_init (EV_A);
3160
3161 EV_FREQUENT_CHECK;
3162
3163 ev_start (EV_A_ (W)w, ++asynccnt);
3164 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3165 asyncs [asynccnt - 1] = w;
3166
3167 EV_FREQUENT_CHECK;
3168}
3169
3170void
3171ev_async_stop (EV_P_ ev_async *w)
3172{
3173 clear_pending (EV_A_ (W)w);
3174 if (expect_false (!ev_is_active (w)))
3175 return;
3176
3177 EV_FREQUENT_CHECK;
3178
3179 {
3180 int active = ev_active (w);
3181
3182 asyncs [active - 1] = asyncs [--asynccnt];
3183 ev_active (asyncs [active - 1]) = active;
3184 }
3185
3186 ev_stop (EV_A_ (W)w);
3187
3188 EV_FREQUENT_CHECK;
3189}
3190
3191void
3192ev_async_send (EV_P_ ev_async *w)
3193{
3194 w->sent = 1;
3195 evpipe_write (EV_A_ &gotasync);
2342} 3196}
2343#endif 3197#endif
2344 3198
2345/*****************************************************************************/ 3199/*****************************************************************************/
2346 3200
… …
2356once_cb (EV_P_ struct ev_once *once, int revents) 3210once_cb (EV_P_ struct ev_once *once, int revents)
2357{ 3211{
2358 void (*cb)(int revents, void *arg) = once->cb; 3212 void (*cb)(int revents, void *arg) = once->cb;
2359 void *arg = once->arg; 3213 void *arg = once->arg;
2360 3214
2361 ev_io_stop (EV_A_ &once->io); 3215 ev_io_stop (EV_A_ &once->io);
2362 ev_timer_stop (EV_A_ &once->to); 3216 ev_timer_stop (EV_A_ &once->to);
2363 ev_free (once); 3217 ev_free (once);
2364 3218
2365 cb (revents, arg); 3219 cb (revents, arg);
2366} 3220}
2367 3221
2368static void 3222static void
2369once_cb_io (EV_P_ ev_io *w, int revents) 3223once_cb_io (EV_P_ ev_io *w, int revents)
2370{ 3224{
2371 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3225 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3226
3227 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2372} 3228}
2373 3229
2374static void 3230static void
2375once_cb_to (EV_P_ ev_timer *w, int revents) 3231once_cb_to (EV_P_ ev_timer *w, int revents)
2376{ 3232{
2377 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3233 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3234
3235 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2378} 3236}
2379 3237
2380void 3238void
2381ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3239ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2382{ 3240{
… …
2404 ev_timer_set (&once->to, timeout, 0.); 3262 ev_timer_set (&once->to, timeout, 0.);
2405 ev_timer_start (EV_A_ &once->to); 3263 ev_timer_start (EV_A_ &once->to);
2406 } 3264 }
2407} 3265}
2408 3266
3267/*****************************************************************************/
3268
3269#if EV_WALK_ENABLE
3270void
3271ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3272{
3273 int i, j;
3274 ev_watcher_list *wl, *wn;
3275
3276 if (types & (EV_IO | EV_EMBED))
3277 for (i = 0; i < anfdmax; ++i)
3278 for (wl = anfds [i].head; wl; )
3279 {
3280 wn = wl->next;
3281
3282#if EV_EMBED_ENABLE
3283 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3284 {
3285 if (types & EV_EMBED)
3286 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3287 }
3288 else
3289#endif
3290#if EV_USE_INOTIFY
3291 if (ev_cb ((ev_io *)wl) == infy_cb)
3292 ;
3293 else
3294#endif
3295 if ((ev_io *)wl != &pipe_w)
3296 if (types & EV_IO)
3297 cb (EV_A_ EV_IO, wl);
3298
3299 wl = wn;
3300 }
3301
3302 if (types & (EV_TIMER | EV_STAT))
3303 for (i = timercnt + HEAP0; i-- > HEAP0; )
3304#if EV_STAT_ENABLE
3305 /*TODO: timer is not always active*/
3306 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3307 {
3308 if (types & EV_STAT)
3309 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3310 }
3311 else
3312#endif
3313 if (types & EV_TIMER)
3314 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3315
3316#if EV_PERIODIC_ENABLE
3317 if (types & EV_PERIODIC)
3318 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3319 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3320#endif
3321
3322#if EV_IDLE_ENABLE
3323 if (types & EV_IDLE)
3324 for (j = NUMPRI; i--; )
3325 for (i = idlecnt [j]; i--; )
3326 cb (EV_A_ EV_IDLE, idles [j][i]);
3327#endif
3328
3329#if EV_FORK_ENABLE
3330 if (types & EV_FORK)
3331 for (i = forkcnt; i--; )
3332 if (ev_cb (forks [i]) != embed_fork_cb)
3333 cb (EV_A_ EV_FORK, forks [i]);
3334#endif
3335
3336#if EV_ASYNC_ENABLE
3337 if (types & EV_ASYNC)
3338 for (i = asynccnt; i--; )
3339 cb (EV_A_ EV_ASYNC, asyncs [i]);
3340#endif
3341
3342 if (types & EV_PREPARE)
3343 for (i = preparecnt; i--; )
3344#if EV_EMBED_ENABLE
3345 if (ev_cb (prepares [i]) != embed_prepare_cb)
3346#endif
3347 cb (EV_A_ EV_PREPARE, prepares [i]);
3348
3349 if (types & EV_CHECK)
3350 for (i = checkcnt; i--; )
3351 cb (EV_A_ EV_CHECK, checks [i]);
3352
3353 if (types & EV_SIGNAL)
3354 for (i = 0; i < signalmax; ++i)
3355 for (wl = signals [i].head; wl; )
3356 {
3357 wn = wl->next;
3358 cb (EV_A_ EV_SIGNAL, wl);
3359 wl = wn;
3360 }
3361
3362 if (types & EV_CHILD)
3363 for (i = EV_PID_HASHSIZE; i--; )
3364 for (wl = childs [i]; wl; )
3365 {
3366 wn = wl->next;
3367 cb (EV_A_ EV_CHILD, wl);
3368 wl = wn;
3369 }
3370/* EV_STAT 0x00001000 /* stat data changed */
3371/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3372}
3373#endif
3374
2409#if EV_MULTIPLICITY 3375#if EV_MULTIPLICITY
2410 #include "ev_wrap.h" 3376 #include "ev_wrap.h"
2411#endif 3377#endif
2412 3378
2413#ifdef __cplusplus 3379#ifdef __cplusplus

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