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Comparing libev/ev.c (file contents):
Revision 1.185 by root, Fri Dec 14 18:22:30 2007 UTC vs.
Revision 1.295 by root, Wed Jul 8 04:29:31 2009 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
31 39
32#ifdef __cplusplus 40#ifdef __cplusplus
33extern "C" { 41extern "C" {
34#endif 42#endif
35 43
44/* this big block deduces configuration from config.h */
36#ifndef EV_STANDALONE 45#ifndef EV_STANDALONE
37# ifdef EV_CONFIG_H 46# ifdef EV_CONFIG_H
38# include EV_CONFIG_H 47# include EV_CONFIG_H
39# else 48# else
40# include "config.h" 49# include "config.h"
41# endif 50# endif
42 51
52# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 0
57# endif
58# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1
60# endif
61# endif
62# elif !defined(EV_USE_CLOCK_SYSCALL)
63# define EV_USE_CLOCK_SYSCALL 0
64# endif
65
43# if HAVE_CLOCK_GETTIME 66# if HAVE_CLOCK_GETTIME
44# ifndef EV_USE_MONOTONIC 67# ifndef EV_USE_MONOTONIC
45# define EV_USE_MONOTONIC 1 68# define EV_USE_MONOTONIC 1
46# endif 69# endif
47# ifndef EV_USE_REALTIME 70# ifndef EV_USE_REALTIME
48# define EV_USE_REALTIME 1 71# define EV_USE_REALTIME 0
49# endif 72# endif
50# else 73# else
51# ifndef EV_USE_MONOTONIC 74# ifndef EV_USE_MONOTONIC
52# define EV_USE_MONOTONIC 0 75# define EV_USE_MONOTONIC 0
53# endif 76# endif
54# ifndef EV_USE_REALTIME 77# ifndef EV_USE_REALTIME
55# define EV_USE_REALTIME 0 78# define EV_USE_REALTIME 0
79# endif
80# endif
81
82# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
84# define EV_USE_NANOSLEEP 1
85# else
86# define EV_USE_NANOSLEEP 0
56# endif 87# endif
57# endif 88# endif
58 89
59# ifndef EV_USE_SELECT 90# ifndef EV_USE_SELECT
60# if HAVE_SELECT && HAVE_SYS_SELECT_H 91# if HAVE_SELECT && HAVE_SYS_SELECT_H
… …
102# else 133# else
103# define EV_USE_INOTIFY 0 134# define EV_USE_INOTIFY 0
104# endif 135# endif
105# endif 136# endif
106 137
138# ifndef EV_USE_EVENTFD
139# if HAVE_EVENTFD
140# define EV_USE_EVENTFD 1
141# else
142# define EV_USE_EVENTFD 0
143# endif
144# endif
145
107#endif 146#endif
108 147
109#include <math.h> 148#include <math.h>
110#include <stdlib.h> 149#include <stdlib.h>
111#include <fcntl.h> 150#include <fcntl.h>
… …
129#ifndef _WIN32 168#ifndef _WIN32
130# include <sys/time.h> 169# include <sys/time.h>
131# include <sys/wait.h> 170# include <sys/wait.h>
132# include <unistd.h> 171# include <unistd.h>
133#else 172#else
173# include <io.h>
134# define WIN32_LEAN_AND_MEAN 174# define WIN32_LEAN_AND_MEAN
135# include <windows.h> 175# include <windows.h>
136# ifndef EV_SELECT_IS_WINSOCKET 176# ifndef EV_SELECT_IS_WINSOCKET
137# define EV_SELECT_IS_WINSOCKET 1 177# define EV_SELECT_IS_WINSOCKET 1
138# endif 178# endif
139#endif 179#endif
140 180
141/**/ 181/* this block tries to deduce configuration from header-defined symbols and defaults */
182
183#ifndef EV_USE_CLOCK_SYSCALL
184# if __linux && __GLIBC__ >= 2
185# define EV_USE_CLOCK_SYSCALL 1
186# else
187# define EV_USE_CLOCK_SYSCALL 0
188# endif
189#endif
142 190
143#ifndef EV_USE_MONOTONIC 191#ifndef EV_USE_MONOTONIC
192# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
193# define EV_USE_MONOTONIC 1
194# else
144# define EV_USE_MONOTONIC 0 195# define EV_USE_MONOTONIC 0
196# endif
145#endif 197#endif
146 198
147#ifndef EV_USE_REALTIME 199#ifndef EV_USE_REALTIME
148# define EV_USE_REALTIME 0 200# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
201#endif
202
203#ifndef EV_USE_NANOSLEEP
204# if _POSIX_C_SOURCE >= 199309L
205# define EV_USE_NANOSLEEP 1
206# else
207# define EV_USE_NANOSLEEP 0
208# endif
149#endif 209#endif
150 210
151#ifndef EV_USE_SELECT 211#ifndef EV_USE_SELECT
152# define EV_USE_SELECT 1 212# define EV_USE_SELECT 1
153#endif 213#endif
… …
159# define EV_USE_POLL 1 219# define EV_USE_POLL 1
160# endif 220# endif
161#endif 221#endif
162 222
163#ifndef EV_USE_EPOLL 223#ifndef EV_USE_EPOLL
224# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
225# define EV_USE_EPOLL 1
226# else
164# define EV_USE_EPOLL 0 227# define EV_USE_EPOLL 0
228# endif
165#endif 229#endif
166 230
167#ifndef EV_USE_KQUEUE 231#ifndef EV_USE_KQUEUE
168# define EV_USE_KQUEUE 0 232# define EV_USE_KQUEUE 0
169#endif 233#endif
… …
171#ifndef EV_USE_PORT 235#ifndef EV_USE_PORT
172# define EV_USE_PORT 0 236# define EV_USE_PORT 0
173#endif 237#endif
174 238
175#ifndef EV_USE_INOTIFY 239#ifndef EV_USE_INOTIFY
240# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
241# define EV_USE_INOTIFY 1
242# else
176# define EV_USE_INOTIFY 0 243# define EV_USE_INOTIFY 0
244# endif
177#endif 245#endif
178 246
179#ifndef EV_PID_HASHSIZE 247#ifndef EV_PID_HASHSIZE
180# if EV_MINIMAL 248# if EV_MINIMAL
181# define EV_PID_HASHSIZE 1 249# define EV_PID_HASHSIZE 1
… …
190# else 258# else
191# define EV_INOTIFY_HASHSIZE 16 259# define EV_INOTIFY_HASHSIZE 16
192# endif 260# endif
193#endif 261#endif
194 262
195/**/ 263#ifndef EV_USE_EVENTFD
264# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
265# define EV_USE_EVENTFD 1
266# else
267# define EV_USE_EVENTFD 0
268# endif
269#endif
270
271#if 0 /* debugging */
272# define EV_VERIFY 3
273# define EV_USE_4HEAP 1
274# define EV_HEAP_CACHE_AT 1
275#endif
276
277#ifndef EV_VERIFY
278# define EV_VERIFY !EV_MINIMAL
279#endif
280
281#ifndef EV_USE_4HEAP
282# define EV_USE_4HEAP !EV_MINIMAL
283#endif
284
285#ifndef EV_HEAP_CACHE_AT
286# define EV_HEAP_CACHE_AT !EV_MINIMAL
287#endif
288
289/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
290/* which makes programs even slower. might work on other unices, too. */
291#if EV_USE_CLOCK_SYSCALL
292# include <syscall.h>
293# ifdef SYS_clock_gettime
294# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
295# undef EV_USE_MONOTONIC
296# define EV_USE_MONOTONIC 1
297# else
298# undef EV_USE_CLOCK_SYSCALL
299# define EV_USE_CLOCK_SYSCALL 0
300# endif
301#endif
302
303/* this block fixes any misconfiguration where we know we run into trouble otherwise */
196 304
197#ifndef CLOCK_MONOTONIC 305#ifndef CLOCK_MONOTONIC
198# undef EV_USE_MONOTONIC 306# undef EV_USE_MONOTONIC
199# define EV_USE_MONOTONIC 0 307# define EV_USE_MONOTONIC 0
200#endif 308#endif
… …
207#if !EV_STAT_ENABLE 315#if !EV_STAT_ENABLE
208# undef EV_USE_INOTIFY 316# undef EV_USE_INOTIFY
209# define EV_USE_INOTIFY 0 317# define EV_USE_INOTIFY 0
210#endif 318#endif
211 319
320#if !EV_USE_NANOSLEEP
321# ifndef _WIN32
322# include <sys/select.h>
323# endif
324#endif
325
212#if EV_USE_INOTIFY 326#if EV_USE_INOTIFY
327# include <sys/utsname.h>
328# include <sys/statfs.h>
213# include <sys/inotify.h> 329# include <sys/inotify.h>
330/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
331# ifndef IN_DONT_FOLLOW
332# undef EV_USE_INOTIFY
333# define EV_USE_INOTIFY 0
334# endif
214#endif 335#endif
215 336
216#if EV_SELECT_IS_WINSOCKET 337#if EV_SELECT_IS_WINSOCKET
217# include <winsock.h> 338# include <winsock.h>
218#endif 339#endif
219 340
341#if EV_USE_EVENTFD
342/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
343# include <stdint.h>
344# ifdef __cplusplus
345extern "C" {
346# endif
347int eventfd (unsigned int initval, int flags);
348# ifdef __cplusplus
349}
350# endif
351#endif
352
220/**/ 353/**/
354
355#if EV_VERIFY >= 3
356# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
357#else
358# define EV_FREQUENT_CHECK do { } while (0)
359#endif
221 360
222/* 361/*
223 * This is used to avoid floating point rounding problems. 362 * This is used to avoid floating point rounding problems.
224 * It is added to ev_rt_now when scheduling periodics 363 * It is added to ev_rt_now when scheduling periodics
225 * to ensure progress, time-wise, even when rounding 364 * to ensure progress, time-wise, even when rounding
… …
237# define expect(expr,value) __builtin_expect ((expr),(value)) 376# define expect(expr,value) __builtin_expect ((expr),(value))
238# define noinline __attribute__ ((noinline)) 377# define noinline __attribute__ ((noinline))
239#else 378#else
240# define expect(expr,value) (expr) 379# define expect(expr,value) (expr)
241# define noinline 380# define noinline
242# if __STDC_VERSION__ < 199901L 381# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
243# define inline 382# define inline
244# endif 383# endif
245#endif 384#endif
246 385
247#define expect_false(expr) expect ((expr) != 0, 0) 386#define expect_false(expr) expect ((expr) != 0, 0)
… …
252# define inline_speed static noinline 391# define inline_speed static noinline
253#else 392#else
254# define inline_speed static inline 393# define inline_speed static inline
255#endif 394#endif
256 395
257#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 396#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
397
398#if EV_MINPRI == EV_MAXPRI
399# define ABSPRI(w) (((W)w), 0)
400#else
258#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 401# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
402#endif
259 403
260#define EMPTY /* required for microsofts broken pseudo-c compiler */ 404#define EMPTY /* required for microsofts broken pseudo-c compiler */
261#define EMPTY2(a,b) /* used to suppress some warnings */ 405#define EMPTY2(a,b) /* used to suppress some warnings */
262 406
263typedef ev_watcher *W; 407typedef ev_watcher *W;
264typedef ev_watcher_list *WL; 408typedef ev_watcher_list *WL;
265typedef ev_watcher_time *WT; 409typedef ev_watcher_time *WT;
266 410
411#define ev_active(w) ((W)(w))->active
412#define ev_at(w) ((WT)(w))->at
413
414#if EV_USE_REALTIME
415/* sig_atomic_t is used to avoid per-thread variables or locking but still */
416/* giving it a reasonably high chance of working on typical architetcures */
417static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
418#endif
419
420#if EV_USE_MONOTONIC
267static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 421static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
422#endif
268 423
269#ifdef _WIN32 424#ifdef _WIN32
270# include "ev_win32.c" 425# include "ev_win32.c"
271#endif 426#endif
272 427
… …
279{ 434{
280 syserr_cb = cb; 435 syserr_cb = cb;
281} 436}
282 437
283static void noinline 438static void noinline
284syserr (const char *msg) 439ev_syserr (const char *msg)
285{ 440{
286 if (!msg) 441 if (!msg)
287 msg = "(libev) system error"; 442 msg = "(libev) system error";
288 443
289 if (syserr_cb) 444 if (syserr_cb)
… …
293 perror (msg); 448 perror (msg);
294 abort (); 449 abort ();
295 } 450 }
296} 451}
297 452
453static void *
454ev_realloc_emul (void *ptr, long size)
455{
456 /* some systems, notably openbsd and darwin, fail to properly
457 * implement realloc (x, 0) (as required by both ansi c-98 and
458 * the single unix specification, so work around them here.
459 */
460
461 if (size)
462 return realloc (ptr, size);
463
464 free (ptr);
465 return 0;
466}
467
298static void *(*alloc)(void *ptr, long size); 468static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
299 469
300void 470void
301ev_set_allocator (void *(*cb)(void *ptr, long size)) 471ev_set_allocator (void *(*cb)(void *ptr, long size))
302{ 472{
303 alloc = cb; 473 alloc = cb;
304} 474}
305 475
306inline_speed void * 476inline_speed void *
307ev_realloc (void *ptr, long size) 477ev_realloc (void *ptr, long size)
308{ 478{
309 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 479 ptr = alloc (ptr, size);
310 480
311 if (!ptr && size) 481 if (!ptr && size)
312 { 482 {
313 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 483 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
314 abort (); 484 abort ();
… …
320#define ev_malloc(size) ev_realloc (0, (size)) 490#define ev_malloc(size) ev_realloc (0, (size))
321#define ev_free(ptr) ev_realloc ((ptr), 0) 491#define ev_free(ptr) ev_realloc ((ptr), 0)
322 492
323/*****************************************************************************/ 493/*****************************************************************************/
324 494
495/* file descriptor info structure */
325typedef struct 496typedef struct
326{ 497{
327 WL head; 498 WL head;
328 unsigned char events; 499 unsigned char events; /* the events watched for */
500 unsigned char reify; /* flag set when this ANFD needs reification */
501 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
329 unsigned char reify; 502 unsigned char unused;
503#if EV_USE_EPOLL
504 unsigned int egen; /* generation counter to counter epoll bugs */
505#endif
330#if EV_SELECT_IS_WINSOCKET 506#if EV_SELECT_IS_WINSOCKET
331 SOCKET handle; 507 SOCKET handle;
332#endif 508#endif
333} ANFD; 509} ANFD;
334 510
511/* stores the pending event set for a given watcher */
335typedef struct 512typedef struct
336{ 513{
337 W w; 514 W w;
338 int events; 515 int events; /* the pending event set for the given watcher */
339} ANPENDING; 516} ANPENDING;
340 517
341#if EV_USE_INOTIFY 518#if EV_USE_INOTIFY
519/* hash table entry per inotify-id */
342typedef struct 520typedef struct
343{ 521{
344 WL head; 522 WL head;
345} ANFS; 523} ANFS;
524#endif
525
526/* Heap Entry */
527#if EV_HEAP_CACHE_AT
528 /* a heap element */
529 typedef struct {
530 ev_tstamp at;
531 WT w;
532 } ANHE;
533
534 #define ANHE_w(he) (he).w /* access watcher, read-write */
535 #define ANHE_at(he) (he).at /* access cached at, read-only */
536 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
537#else
538 /* a heap element */
539 typedef WT ANHE;
540
541 #define ANHE_w(he) (he)
542 #define ANHE_at(he) (he)->at
543 #define ANHE_at_cache(he)
346#endif 544#endif
347 545
348#if EV_MULTIPLICITY 546#if EV_MULTIPLICITY
349 547
350 struct ev_loop 548 struct ev_loop
… …
371 569
372#endif 570#endif
373 571
374/*****************************************************************************/ 572/*****************************************************************************/
375 573
574#ifndef EV_HAVE_EV_TIME
376ev_tstamp 575ev_tstamp
377ev_time (void) 576ev_time (void)
378{ 577{
379#if EV_USE_REALTIME 578#if EV_USE_REALTIME
579 if (expect_true (have_realtime))
580 {
380 struct timespec ts; 581 struct timespec ts;
381 clock_gettime (CLOCK_REALTIME, &ts); 582 clock_gettime (CLOCK_REALTIME, &ts);
382 return ts.tv_sec + ts.tv_nsec * 1e-9; 583 return ts.tv_sec + ts.tv_nsec * 1e-9;
383#else 584 }
585#endif
586
384 struct timeval tv; 587 struct timeval tv;
385 gettimeofday (&tv, 0); 588 gettimeofday (&tv, 0);
386 return tv.tv_sec + tv.tv_usec * 1e-6; 589 return tv.tv_sec + tv.tv_usec * 1e-6;
387#endif
388} 590}
591#endif
389 592
390ev_tstamp inline_size 593inline_size ev_tstamp
391get_clock (void) 594get_clock (void)
392{ 595{
393#if EV_USE_MONOTONIC 596#if EV_USE_MONOTONIC
394 if (expect_true (have_monotonic)) 597 if (expect_true (have_monotonic))
395 { 598 {
… …
408{ 611{
409 return ev_rt_now; 612 return ev_rt_now;
410} 613}
411#endif 614#endif
412 615
413int inline_size 616void
617ev_sleep (ev_tstamp delay)
618{
619 if (delay > 0.)
620 {
621#if EV_USE_NANOSLEEP
622 struct timespec ts;
623
624 ts.tv_sec = (time_t)delay;
625 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
626
627 nanosleep (&ts, 0);
628#elif defined(_WIN32)
629 Sleep ((unsigned long)(delay * 1e3));
630#else
631 struct timeval tv;
632
633 tv.tv_sec = (time_t)delay;
634 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
635
636 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
637 /* somehting not guaranteed by newer posix versions, but guaranteed */
638 /* by older ones */
639 select (0, 0, 0, 0, &tv);
640#endif
641 }
642}
643
644/*****************************************************************************/
645
646#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
647
648/* find a suitable new size for the given array, */
649/* hopefully by rounding to a ncie-to-malloc size */
650inline_size int
414array_nextsize (int elem, int cur, int cnt) 651array_nextsize (int elem, int cur, int cnt)
415{ 652{
416 int ncur = cur + 1; 653 int ncur = cur + 1;
417 654
418 do 655 do
419 ncur <<= 1; 656 ncur <<= 1;
420 while (cnt > ncur); 657 while (cnt > ncur);
421 658
422 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 659 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
423 if (elem * ncur > 4096) 660 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
424 { 661 {
425 ncur *= elem; 662 ncur *= elem;
426 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 663 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
427 ncur = ncur - sizeof (void *) * 4; 664 ncur = ncur - sizeof (void *) * 4;
428 ncur /= elem; 665 ncur /= elem;
429 } 666 }
430 667
431 return ncur; 668 return ncur;
… …
435array_realloc (int elem, void *base, int *cur, int cnt) 672array_realloc (int elem, void *base, int *cur, int cnt)
436{ 673{
437 *cur = array_nextsize (elem, *cur, cnt); 674 *cur = array_nextsize (elem, *cur, cnt);
438 return ev_realloc (base, elem * *cur); 675 return ev_realloc (base, elem * *cur);
439} 676}
677
678#define array_init_zero(base,count) \
679 memset ((void *)(base), 0, sizeof (*(base)) * (count))
440 680
441#define array_needsize(type,base,cur,cnt,init) \ 681#define array_needsize(type,base,cur,cnt,init) \
442 if (expect_false ((cnt) > (cur))) \ 682 if (expect_false ((cnt) > (cur))) \
443 { \ 683 { \
444 int ocur_ = (cur); \ 684 int ocur_ = (cur); \
… …
456 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 696 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
457 } 697 }
458#endif 698#endif
459 699
460#define array_free(stem, idx) \ 700#define array_free(stem, idx) \
461 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 701 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
462 702
463/*****************************************************************************/ 703/*****************************************************************************/
704
705/* dummy callback for pending events */
706static void noinline
707pendingcb (EV_P_ ev_prepare *w, int revents)
708{
709}
464 710
465void noinline 711void noinline
466ev_feed_event (EV_P_ void *w, int revents) 712ev_feed_event (EV_P_ void *w, int revents)
467{ 713{
468 W w_ = (W)w; 714 W w_ = (W)w;
… …
477 pendings [pri][w_->pending - 1].w = w_; 723 pendings [pri][w_->pending - 1].w = w_;
478 pendings [pri][w_->pending - 1].events = revents; 724 pendings [pri][w_->pending - 1].events = revents;
479 } 725 }
480} 726}
481 727
482void inline_speed 728inline_speed void
729feed_reverse (EV_P_ W w)
730{
731 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
732 rfeeds [rfeedcnt++] = w;
733}
734
735inline_size void
736feed_reverse_done (EV_P_ int revents)
737{
738 do
739 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
740 while (rfeedcnt);
741}
742
743inline_speed void
483queue_events (EV_P_ W *events, int eventcnt, int type) 744queue_events (EV_P_ W *events, int eventcnt, int type)
484{ 745{
485 int i; 746 int i;
486 747
487 for (i = 0; i < eventcnt; ++i) 748 for (i = 0; i < eventcnt; ++i)
488 ev_feed_event (EV_A_ events [i], type); 749 ev_feed_event (EV_A_ events [i], type);
489} 750}
490 751
491/*****************************************************************************/ 752/*****************************************************************************/
492 753
493void inline_size 754inline_speed void
494anfds_init (ANFD *base, int count)
495{
496 while (count--)
497 {
498 base->head = 0;
499 base->events = EV_NONE;
500 base->reify = 0;
501
502 ++base;
503 }
504}
505
506void inline_speed
507fd_event (EV_P_ int fd, int revents) 755fd_event (EV_P_ int fd, int revents)
508{ 756{
509 ANFD *anfd = anfds + fd; 757 ANFD *anfd = anfds + fd;
510 ev_io *w; 758 ev_io *w;
511 759
… …
523{ 771{
524 if (fd >= 0 && fd < anfdmax) 772 if (fd >= 0 && fd < anfdmax)
525 fd_event (EV_A_ fd, revents); 773 fd_event (EV_A_ fd, revents);
526} 774}
527 775
528void inline_size 776/* make sure the external fd watch events are in-sync */
777/* with the kernel/libev internal state */
778inline_size void
529fd_reify (EV_P) 779fd_reify (EV_P)
530{ 780{
531 int i; 781 int i;
532 782
533 for (i = 0; i < fdchangecnt; ++i) 783 for (i = 0; i < fdchangecnt; ++i)
… …
542 events |= (unsigned char)w->events; 792 events |= (unsigned char)w->events;
543 793
544#if EV_SELECT_IS_WINSOCKET 794#if EV_SELECT_IS_WINSOCKET
545 if (events) 795 if (events)
546 { 796 {
547 unsigned long argp; 797 unsigned long arg;
798 #ifdef EV_FD_TO_WIN32_HANDLE
799 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
800 #else
548 anfd->handle = _get_osfhandle (fd); 801 anfd->handle = _get_osfhandle (fd);
802 #endif
549 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 803 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
550 } 804 }
551#endif 805#endif
552 806
553 { 807 {
554 unsigned char o_events = anfd->events; 808 unsigned char o_events = anfd->events;
555 unsigned char o_reify = anfd->reify; 809 unsigned char o_reify = anfd->reify;
556 810
557 anfd->reify = 0; 811 anfd->reify = 0;
558 anfd->events = events; 812 anfd->events = events;
559 813
560 if (o_events != events || o_reify & EV_IOFDSET) 814 if (o_events != events || o_reify & EV__IOFDSET)
561 backend_modify (EV_A_ fd, o_events, events); 815 backend_modify (EV_A_ fd, o_events, events);
562 } 816 }
563 } 817 }
564 818
565 fdchangecnt = 0; 819 fdchangecnt = 0;
566} 820}
567 821
568void inline_size 822/* something about the given fd changed */
823inline_size void
569fd_change (EV_P_ int fd, int flags) 824fd_change (EV_P_ int fd, int flags)
570{ 825{
571 unsigned char reify = anfds [fd].reify; 826 unsigned char reify = anfds [fd].reify;
572 anfds [fd].reify |= flags; 827 anfds [fd].reify |= flags;
573 828
… …
577 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 832 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
578 fdchanges [fdchangecnt - 1] = fd; 833 fdchanges [fdchangecnt - 1] = fd;
579 } 834 }
580} 835}
581 836
582void inline_speed 837/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
838inline_speed void
583fd_kill (EV_P_ int fd) 839fd_kill (EV_P_ int fd)
584{ 840{
585 ev_io *w; 841 ev_io *w;
586 842
587 while ((w = (ev_io *)anfds [fd].head)) 843 while ((w = (ev_io *)anfds [fd].head))
… …
589 ev_io_stop (EV_A_ w); 845 ev_io_stop (EV_A_ w);
590 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 846 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
591 } 847 }
592} 848}
593 849
594int inline_size 850/* check whether the given fd is atcually valid, for error recovery */
851inline_size int
595fd_valid (int fd) 852fd_valid (int fd)
596{ 853{
597#ifdef _WIN32 854#ifdef _WIN32
598 return _get_osfhandle (fd) != -1; 855 return _get_osfhandle (fd) != -1;
599#else 856#else
… …
607{ 864{
608 int fd; 865 int fd;
609 866
610 for (fd = 0; fd < anfdmax; ++fd) 867 for (fd = 0; fd < anfdmax; ++fd)
611 if (anfds [fd].events) 868 if (anfds [fd].events)
612 if (!fd_valid (fd) == -1 && errno == EBADF) 869 if (!fd_valid (fd) && errno == EBADF)
613 fd_kill (EV_A_ fd); 870 fd_kill (EV_A_ fd);
614} 871}
615 872
616/* called on ENOMEM in select/poll to kill some fds and retry */ 873/* called on ENOMEM in select/poll to kill some fds and retry */
617static void noinline 874static void noinline
… …
635 892
636 for (fd = 0; fd < anfdmax; ++fd) 893 for (fd = 0; fd < anfdmax; ++fd)
637 if (anfds [fd].events) 894 if (anfds [fd].events)
638 { 895 {
639 anfds [fd].events = 0; 896 anfds [fd].events = 0;
897 anfds [fd].emask = 0;
640 fd_change (EV_A_ fd, EV_IOFDSET | 1); 898 fd_change (EV_A_ fd, EV__IOFDSET | 1);
641 } 899 }
642} 900}
643 901
644/*****************************************************************************/ 902/*****************************************************************************/
645 903
646void inline_speed 904/*
647upheap (WT *heap, int k) 905 * the heap functions want a real array index. array index 0 uis guaranteed to not
648{ 906 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
649 WT w = heap [k]; 907 * the branching factor of the d-tree.
908 */
650 909
651 while (k) 910/*
652 { 911 * at the moment we allow libev the luxury of two heaps,
653 int p = (k - 1) >> 1; 912 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
913 * which is more cache-efficient.
914 * the difference is about 5% with 50000+ watchers.
915 */
916#if EV_USE_4HEAP
654 917
655 if (heap [p]->at <= w->at) 918#define DHEAP 4
919#define HEAP0 (DHEAP - 1) /* index of first element in heap */
920#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
921#define UPHEAP_DONE(p,k) ((p) == (k))
922
923/* away from the root */
924inline_speed void
925downheap (ANHE *heap, int N, int k)
926{
927 ANHE he = heap [k];
928 ANHE *E = heap + N + HEAP0;
929
930 for (;;)
931 {
932 ev_tstamp minat;
933 ANHE *minpos;
934 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
935
936 /* find minimum child */
937 if (expect_true (pos + DHEAP - 1 < E))
938 {
939 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
940 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
941 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
942 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
943 }
944 else if (pos < E)
945 {
946 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
947 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
948 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
949 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
950 }
951 else
656 break; 952 break;
657 953
954 if (ANHE_at (he) <= minat)
955 break;
956
957 heap [k] = *minpos;
958 ev_active (ANHE_w (*minpos)) = k;
959
960 k = minpos - heap;
961 }
962
963 heap [k] = he;
964 ev_active (ANHE_w (he)) = k;
965}
966
967#else /* 4HEAP */
968
969#define HEAP0 1
970#define HPARENT(k) ((k) >> 1)
971#define UPHEAP_DONE(p,k) (!(p))
972
973/* away from the root */
974inline_speed void
975downheap (ANHE *heap, int N, int k)
976{
977 ANHE he = heap [k];
978
979 for (;;)
980 {
981 int c = k << 1;
982
983 if (c > N + HEAP0 - 1)
984 break;
985
986 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
987 ? 1 : 0;
988
989 if (ANHE_at (he) <= ANHE_at (heap [c]))
990 break;
991
992 heap [k] = heap [c];
993 ev_active (ANHE_w (heap [k])) = k;
994
995 k = c;
996 }
997
998 heap [k] = he;
999 ev_active (ANHE_w (he)) = k;
1000}
1001#endif
1002
1003/* towards the root */
1004inline_speed void
1005upheap (ANHE *heap, int k)
1006{
1007 ANHE he = heap [k];
1008
1009 for (;;)
1010 {
1011 int p = HPARENT (k);
1012
1013 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1014 break;
1015
658 heap [k] = heap [p]; 1016 heap [k] = heap [p];
659 ((W)heap [k])->active = k + 1; 1017 ev_active (ANHE_w (heap [k])) = k;
660 k = p; 1018 k = p;
661 } 1019 }
662 1020
663 heap [k] = w; 1021 heap [k] = he;
664 ((W)heap [k])->active = k + 1; 1022 ev_active (ANHE_w (he)) = k;
665} 1023}
666 1024
667void inline_speed 1025/* move an element suitably so it is in a correct place */
668downheap (WT *heap, int N, int k) 1026inline_size void
669{
670 WT w = heap [k];
671
672 for (;;)
673 {
674 int c = (k << 1) + 1;
675
676 if (c >= N)
677 break;
678
679 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
680 ? 1 : 0;
681
682 if (w->at <= heap [c]->at)
683 break;
684
685 heap [k] = heap [c];
686 ((W)heap [k])->active = k + 1;
687
688 k = c;
689 }
690
691 heap [k] = w;
692 ((W)heap [k])->active = k + 1;
693}
694
695void inline_size
696adjustheap (WT *heap, int N, int k) 1027adjustheap (ANHE *heap, int N, int k)
697{ 1028{
1029 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
698 upheap (heap, k); 1030 upheap (heap, k);
1031 else
699 downheap (heap, N, k); 1032 downheap (heap, N, k);
1033}
1034
1035/* rebuild the heap: this function is used only once and executed rarely */
1036inline_size void
1037reheap (ANHE *heap, int N)
1038{
1039 int i;
1040
1041 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1042 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1043 for (i = 0; i < N; ++i)
1044 upheap (heap, i + HEAP0);
700} 1045}
701 1046
702/*****************************************************************************/ 1047/*****************************************************************************/
703 1048
1049/* associate signal watchers to a signal signal */
704typedef struct 1050typedef struct
705{ 1051{
706 WL head; 1052 WL head;
707 sig_atomic_t volatile gotsig; 1053 EV_ATOMIC_T gotsig;
708} ANSIG; 1054} ANSIG;
709 1055
710static ANSIG *signals; 1056static ANSIG *signals;
711static int signalmax; 1057static int signalmax;
712 1058
713static int sigpipe [2]; 1059static EV_ATOMIC_T gotsig;
714static sig_atomic_t volatile gotsig;
715static ev_io sigev;
716 1060
717void inline_size 1061/*****************************************************************************/
718signals_init (ANSIG *base, int count)
719{
720 while (count--)
721 {
722 base->head = 0;
723 base->gotsig = 0;
724 1062
725 ++base; 1063/* used to prepare libev internal fd's */
726 } 1064/* this is not fork-safe */
727} 1065inline_speed void
728
729static void
730sighandler (int signum)
731{
732#if _WIN32
733 signal (signum, sighandler);
734#endif
735
736 signals [signum - 1].gotsig = 1;
737
738 if (!gotsig)
739 {
740 int old_errno = errno;
741 gotsig = 1;
742 write (sigpipe [1], &signum, 1);
743 errno = old_errno;
744 }
745}
746
747void noinline
748ev_feed_signal_event (EV_P_ int signum)
749{
750 WL w;
751
752#if EV_MULTIPLICITY
753 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
754#endif
755
756 --signum;
757
758 if (signum < 0 || signum >= signalmax)
759 return;
760
761 signals [signum].gotsig = 0;
762
763 for (w = signals [signum].head; w; w = w->next)
764 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
765}
766
767static void
768sigcb (EV_P_ ev_io *iow, int revents)
769{
770 int signum;
771
772 read (sigpipe [0], &revents, 1);
773 gotsig = 0;
774
775 for (signum = signalmax; signum--; )
776 if (signals [signum].gotsig)
777 ev_feed_signal_event (EV_A_ signum + 1);
778}
779
780void inline_speed
781fd_intern (int fd) 1066fd_intern (int fd)
782{ 1067{
783#ifdef _WIN32 1068#ifdef _WIN32
784 int arg = 1; 1069 unsigned long arg = 1;
785 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1070 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
786#else 1071#else
787 fcntl (fd, F_SETFD, FD_CLOEXEC); 1072 fcntl (fd, F_SETFD, FD_CLOEXEC);
788 fcntl (fd, F_SETFL, O_NONBLOCK); 1073 fcntl (fd, F_SETFL, O_NONBLOCK);
789#endif 1074#endif
790} 1075}
791 1076
792static void noinline 1077static void noinline
793siginit (EV_P) 1078evpipe_init (EV_P)
794{ 1079{
1080 if (!ev_is_active (&pipe_w))
1081 {
1082#if EV_USE_EVENTFD
1083 if ((evfd = eventfd (0, 0)) >= 0)
1084 {
1085 evpipe [0] = -1;
1086 fd_intern (evfd);
1087 ev_io_set (&pipe_w, evfd, EV_READ);
1088 }
1089 else
1090#endif
1091 {
1092 while (pipe (evpipe))
1093 ev_syserr ("(libev) error creating signal/async pipe");
1094
795 fd_intern (sigpipe [0]); 1095 fd_intern (evpipe [0]);
796 fd_intern (sigpipe [1]); 1096 fd_intern (evpipe [1]);
1097 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1098 }
797 1099
798 ev_io_set (&sigev, sigpipe [0], EV_READ);
799 ev_io_start (EV_A_ &sigev); 1100 ev_io_start (EV_A_ &pipe_w);
800 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1101 ev_unref (EV_A); /* watcher should not keep loop alive */
1102 }
1103}
1104
1105inline_size void
1106evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1107{
1108 if (!*flag)
1109 {
1110 int old_errno = errno; /* save errno because write might clobber it */
1111
1112 *flag = 1;
1113
1114#if EV_USE_EVENTFD
1115 if (evfd >= 0)
1116 {
1117 uint64_t counter = 1;
1118 write (evfd, &counter, sizeof (uint64_t));
1119 }
1120 else
1121#endif
1122 write (evpipe [1], &old_errno, 1);
1123
1124 errno = old_errno;
1125 }
1126}
1127
1128/* called whenever the libev signal pipe */
1129/* got some events (signal, async) */
1130static void
1131pipecb (EV_P_ ev_io *iow, int revents)
1132{
1133#if EV_USE_EVENTFD
1134 if (evfd >= 0)
1135 {
1136 uint64_t counter;
1137 read (evfd, &counter, sizeof (uint64_t));
1138 }
1139 else
1140#endif
1141 {
1142 char dummy;
1143 read (evpipe [0], &dummy, 1);
1144 }
1145
1146 if (gotsig && ev_is_default_loop (EV_A))
1147 {
1148 int signum;
1149 gotsig = 0;
1150
1151 for (signum = signalmax; signum--; )
1152 if (signals [signum].gotsig)
1153 ev_feed_signal_event (EV_A_ signum + 1);
1154 }
1155
1156#if EV_ASYNC_ENABLE
1157 if (gotasync)
1158 {
1159 int i;
1160 gotasync = 0;
1161
1162 for (i = asynccnt; i--; )
1163 if (asyncs [i]->sent)
1164 {
1165 asyncs [i]->sent = 0;
1166 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1167 }
1168 }
1169#endif
801} 1170}
802 1171
803/*****************************************************************************/ 1172/*****************************************************************************/
804 1173
1174static void
1175ev_sighandler (int signum)
1176{
1177#if EV_MULTIPLICITY
1178 struct ev_loop *loop = &default_loop_struct;
1179#endif
1180
1181#if _WIN32
1182 signal (signum, ev_sighandler);
1183#endif
1184
1185 signals [signum - 1].gotsig = 1;
1186 evpipe_write (EV_A_ &gotsig);
1187}
1188
1189void noinline
1190ev_feed_signal_event (EV_P_ int signum)
1191{
1192 WL w;
1193
1194#if EV_MULTIPLICITY
1195 assert (("libev: feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1196#endif
1197
1198 --signum;
1199
1200 if (signum < 0 || signum >= signalmax)
1201 return;
1202
1203 signals [signum].gotsig = 0;
1204
1205 for (w = signals [signum].head; w; w = w->next)
1206 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1207}
1208
1209/*****************************************************************************/
1210
805static WL childs [EV_PID_HASHSIZE]; 1211static WL childs [EV_PID_HASHSIZE];
806 1212
807#ifndef _WIN32 1213#ifndef _WIN32
808 1214
809static ev_signal childev; 1215static ev_signal childev;
810 1216
811void inline_speed 1217#ifndef WIFCONTINUED
1218# define WIFCONTINUED(status) 0
1219#endif
1220
1221/* handle a single child status event */
1222inline_speed void
812child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 1223child_reap (EV_P_ int chain, int pid, int status)
813{ 1224{
814 ev_child *w; 1225 ev_child *w;
1226 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
815 1227
816 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1228 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1229 {
817 if (w->pid == pid || !w->pid) 1230 if ((w->pid == pid || !w->pid)
1231 && (!traced || (w->flags & 1)))
818 { 1232 {
819 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 1233 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
820 w->rpid = pid; 1234 w->rpid = pid;
821 w->rstatus = status; 1235 w->rstatus = status;
822 ev_feed_event (EV_A_ (W)w, EV_CHILD); 1236 ev_feed_event (EV_A_ (W)w, EV_CHILD);
823 } 1237 }
1238 }
824} 1239}
825 1240
826#ifndef WCONTINUED 1241#ifndef WCONTINUED
827# define WCONTINUED 0 1242# define WCONTINUED 0
828#endif 1243#endif
829 1244
1245/* called on sigchld etc., calls waitpid */
830static void 1246static void
831childcb (EV_P_ ev_signal *sw, int revents) 1247childcb (EV_P_ ev_signal *sw, int revents)
832{ 1248{
833 int pid, status; 1249 int pid, status;
834 1250
… …
837 if (!WCONTINUED 1253 if (!WCONTINUED
838 || errno != EINVAL 1254 || errno != EINVAL
839 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 1255 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
840 return; 1256 return;
841 1257
842 /* make sure we are called again until all childs have been reaped */ 1258 /* make sure we are called again until all children have been reaped */
843 /* we need to do it this way so that the callback gets called before we continue */ 1259 /* we need to do it this way so that the callback gets called before we continue */
844 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1260 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
845 1261
846 child_reap (EV_A_ sw, pid, pid, status); 1262 child_reap (EV_A_ pid, pid, status);
847 if (EV_PID_HASHSIZE > 1) 1263 if (EV_PID_HASHSIZE > 1)
848 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1264 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
849} 1265}
850 1266
851#endif 1267#endif
852 1268
853/*****************************************************************************/ 1269/*****************************************************************************/
… …
915 /* kqueue is borked on everything but netbsd apparently */ 1331 /* kqueue is borked on everything but netbsd apparently */
916 /* it usually doesn't work correctly on anything but sockets and pipes */ 1332 /* it usually doesn't work correctly on anything but sockets and pipes */
917 flags &= ~EVBACKEND_KQUEUE; 1333 flags &= ~EVBACKEND_KQUEUE;
918#endif 1334#endif
919#ifdef __APPLE__ 1335#ifdef __APPLE__
920 // flags &= ~EVBACKEND_KQUEUE; for documentation 1336 /* only select works correctly on that "unix-certified" platform */
921 flags &= ~EVBACKEND_POLL; 1337 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1338 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
922#endif 1339#endif
923 1340
924 return flags; 1341 return flags;
925} 1342}
926 1343
927unsigned int 1344unsigned int
928ev_embeddable_backends (void) 1345ev_embeddable_backends (void)
929{ 1346{
930 return EVBACKEND_EPOLL 1347 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
931 | EVBACKEND_KQUEUE 1348
932 | EVBACKEND_PORT; 1349 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1350 /* please fix it and tell me how to detect the fix */
1351 flags &= ~EVBACKEND_EPOLL;
1352
1353 return flags;
933} 1354}
934 1355
935unsigned int 1356unsigned int
936ev_backend (EV_P) 1357ev_backend (EV_P)
937{ 1358{
… …
942ev_loop_count (EV_P) 1363ev_loop_count (EV_P)
943{ 1364{
944 return loop_count; 1365 return loop_count;
945} 1366}
946 1367
1368unsigned int
1369ev_loop_depth (EV_P)
1370{
1371 return loop_depth;
1372}
1373
1374void
1375ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1376{
1377 io_blocktime = interval;
1378}
1379
1380void
1381ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1382{
1383 timeout_blocktime = interval;
1384}
1385
1386/* initialise a loop structure, must be zero-initialised */
947static void noinline 1387static void noinline
948loop_init (EV_P_ unsigned int flags) 1388loop_init (EV_P_ unsigned int flags)
949{ 1389{
950 if (!backend) 1390 if (!backend)
951 { 1391 {
1392#if EV_USE_REALTIME
1393 if (!have_realtime)
1394 {
1395 struct timespec ts;
1396
1397 if (!clock_gettime (CLOCK_REALTIME, &ts))
1398 have_realtime = 1;
1399 }
1400#endif
1401
952#if EV_USE_MONOTONIC 1402#if EV_USE_MONOTONIC
1403 if (!have_monotonic)
953 { 1404 {
954 struct timespec ts; 1405 struct timespec ts;
1406
955 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1407 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
956 have_monotonic = 1; 1408 have_monotonic = 1;
957 } 1409 }
958#endif 1410#endif
959 1411
960 ev_rt_now = ev_time (); 1412 ev_rt_now = ev_time ();
961 mn_now = get_clock (); 1413 mn_now = get_clock ();
962 now_floor = mn_now; 1414 now_floor = mn_now;
963 rtmn_diff = ev_rt_now - mn_now; 1415 rtmn_diff = ev_rt_now - mn_now;
1416
1417 io_blocktime = 0.;
1418 timeout_blocktime = 0.;
1419 backend = 0;
1420 backend_fd = -1;
1421 gotasync = 0;
1422#if EV_USE_INOTIFY
1423 fs_fd = -2;
1424#endif
964 1425
965 /* pid check not overridable via env */ 1426 /* pid check not overridable via env */
966#ifndef _WIN32 1427#ifndef _WIN32
967 if (flags & EVFLAG_FORKCHECK) 1428 if (flags & EVFLAG_FORKCHECK)
968 curpid = getpid (); 1429 curpid = getpid ();
… …
971 if (!(flags & EVFLAG_NOENV) 1432 if (!(flags & EVFLAG_NOENV)
972 && !enable_secure () 1433 && !enable_secure ()
973 && getenv ("LIBEV_FLAGS")) 1434 && getenv ("LIBEV_FLAGS"))
974 flags = atoi (getenv ("LIBEV_FLAGS")); 1435 flags = atoi (getenv ("LIBEV_FLAGS"));
975 1436
976 if (!(flags & 0x0000ffffUL)) 1437 if (!(flags & 0x0000ffffU))
977 flags |= ev_recommended_backends (); 1438 flags |= ev_recommended_backends ();
978
979 backend = 0;
980 backend_fd = -1;
981#if EV_USE_INOTIFY
982 fs_fd = -2;
983#endif
984 1439
985#if EV_USE_PORT 1440#if EV_USE_PORT
986 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1441 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
987#endif 1442#endif
988#if EV_USE_KQUEUE 1443#if EV_USE_KQUEUE
… …
996#endif 1451#endif
997#if EV_USE_SELECT 1452#if EV_USE_SELECT
998 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1453 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
999#endif 1454#endif
1000 1455
1456 ev_prepare_init (&pending_w, pendingcb);
1457
1001 ev_init (&sigev, sigcb); 1458 ev_init (&pipe_w, pipecb);
1002 ev_set_priority (&sigev, EV_MAXPRI); 1459 ev_set_priority (&pipe_w, EV_MAXPRI);
1003 } 1460 }
1004} 1461}
1005 1462
1463/* free up a loop structure */
1006static void noinline 1464static void noinline
1007loop_destroy (EV_P) 1465loop_destroy (EV_P)
1008{ 1466{
1009 int i; 1467 int i;
1468
1469 if (ev_is_active (&pipe_w))
1470 {
1471 ev_ref (EV_A); /* signal watcher */
1472 ev_io_stop (EV_A_ &pipe_w);
1473
1474#if EV_USE_EVENTFD
1475 if (evfd >= 0)
1476 close (evfd);
1477#endif
1478
1479 if (evpipe [0] >= 0)
1480 {
1481 close (evpipe [0]);
1482 close (evpipe [1]);
1483 }
1484 }
1010 1485
1011#if EV_USE_INOTIFY 1486#if EV_USE_INOTIFY
1012 if (fs_fd >= 0) 1487 if (fs_fd >= 0)
1013 close (fs_fd); 1488 close (fs_fd);
1014#endif 1489#endif
… …
1038#if EV_IDLE_ENABLE 1513#if EV_IDLE_ENABLE
1039 array_free (idle, [i]); 1514 array_free (idle, [i]);
1040#endif 1515#endif
1041 } 1516 }
1042 1517
1518 ev_free (anfds); anfdmax = 0;
1519
1043 /* have to use the microsoft-never-gets-it-right macro */ 1520 /* have to use the microsoft-never-gets-it-right macro */
1521 array_free (rfeed, EMPTY);
1044 array_free (fdchange, EMPTY); 1522 array_free (fdchange, EMPTY);
1045 array_free (timer, EMPTY); 1523 array_free (timer, EMPTY);
1046#if EV_PERIODIC_ENABLE 1524#if EV_PERIODIC_ENABLE
1047 array_free (periodic, EMPTY); 1525 array_free (periodic, EMPTY);
1048#endif 1526#endif
1527#if EV_FORK_ENABLE
1528 array_free (fork, EMPTY);
1529#endif
1049 array_free (prepare, EMPTY); 1530 array_free (prepare, EMPTY);
1050 array_free (check, EMPTY); 1531 array_free (check, EMPTY);
1532#if EV_ASYNC_ENABLE
1533 array_free (async, EMPTY);
1534#endif
1051 1535
1052 backend = 0; 1536 backend = 0;
1053} 1537}
1054 1538
1539#if EV_USE_INOTIFY
1055void inline_size infy_fork (EV_P); 1540inline_size void infy_fork (EV_P);
1541#endif
1056 1542
1057void inline_size 1543inline_size void
1058loop_fork (EV_P) 1544loop_fork (EV_P)
1059{ 1545{
1060#if EV_USE_PORT 1546#if EV_USE_PORT
1061 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 1547 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1062#endif 1548#endif
… …
1068#endif 1554#endif
1069#if EV_USE_INOTIFY 1555#if EV_USE_INOTIFY
1070 infy_fork (EV_A); 1556 infy_fork (EV_A);
1071#endif 1557#endif
1072 1558
1073 if (ev_is_active (&sigev)) 1559 if (ev_is_active (&pipe_w))
1074 { 1560 {
1075 /* default loop */ 1561 /* this "locks" the handlers against writing to the pipe */
1562 /* while we modify the fd vars */
1563 gotsig = 1;
1564#if EV_ASYNC_ENABLE
1565 gotasync = 1;
1566#endif
1076 1567
1077 ev_ref (EV_A); 1568 ev_ref (EV_A);
1078 ev_io_stop (EV_A_ &sigev); 1569 ev_io_stop (EV_A_ &pipe_w);
1570
1571#if EV_USE_EVENTFD
1572 if (evfd >= 0)
1573 close (evfd);
1574#endif
1575
1576 if (evpipe [0] >= 0)
1577 {
1079 close (sigpipe [0]); 1578 close (evpipe [0]);
1080 close (sigpipe [1]); 1579 close (evpipe [1]);
1580 }
1081 1581
1082 while (pipe (sigpipe))
1083 syserr ("(libev) error creating pipe");
1084
1085 siginit (EV_A); 1582 evpipe_init (EV_A);
1583 /* now iterate over everything, in case we missed something */
1584 pipecb (EV_A_ &pipe_w, EV_READ);
1086 } 1585 }
1087 1586
1088 postfork = 0; 1587 postfork = 0;
1089} 1588}
1090 1589
1091#if EV_MULTIPLICITY 1590#if EV_MULTIPLICITY
1591
1092struct ev_loop * 1592struct ev_loop *
1093ev_loop_new (unsigned int flags) 1593ev_loop_new (unsigned int flags)
1094{ 1594{
1095 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 1595 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1096 1596
… …
1112} 1612}
1113 1613
1114void 1614void
1115ev_loop_fork (EV_P) 1615ev_loop_fork (EV_P)
1116{ 1616{
1117 postfork = 1; 1617 postfork = 1; /* must be in line with ev_default_fork */
1118} 1618}
1119 1619
1620#if EV_VERIFY
1621static void noinline
1622verify_watcher (EV_P_ W w)
1623{
1624 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1625
1626 if (w->pending)
1627 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1628}
1629
1630static void noinline
1631verify_heap (EV_P_ ANHE *heap, int N)
1632{
1633 int i;
1634
1635 for (i = HEAP0; i < N + HEAP0; ++i)
1636 {
1637 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1638 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1639 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1640
1641 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1642 }
1643}
1644
1645static void noinline
1646array_verify (EV_P_ W *ws, int cnt)
1647{
1648 while (cnt--)
1649 {
1650 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1651 verify_watcher (EV_A_ ws [cnt]);
1652 }
1653}
1654#endif
1655
1656void
1657ev_loop_verify (EV_P)
1658{
1659#if EV_VERIFY
1660 int i;
1661 WL w;
1662
1663 assert (activecnt >= -1);
1664
1665 assert (fdchangemax >= fdchangecnt);
1666 for (i = 0; i < fdchangecnt; ++i)
1667 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1668
1669 assert (anfdmax >= 0);
1670 for (i = 0; i < anfdmax; ++i)
1671 for (w = anfds [i].head; w; w = w->next)
1672 {
1673 verify_watcher (EV_A_ (W)w);
1674 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1675 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1676 }
1677
1678 assert (timermax >= timercnt);
1679 verify_heap (EV_A_ timers, timercnt);
1680
1681#if EV_PERIODIC_ENABLE
1682 assert (periodicmax >= periodiccnt);
1683 verify_heap (EV_A_ periodics, periodiccnt);
1684#endif
1685
1686 for (i = NUMPRI; i--; )
1687 {
1688 assert (pendingmax [i] >= pendingcnt [i]);
1689#if EV_IDLE_ENABLE
1690 assert (idleall >= 0);
1691 assert (idlemax [i] >= idlecnt [i]);
1692 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1693#endif
1694 }
1695
1696#if EV_FORK_ENABLE
1697 assert (forkmax >= forkcnt);
1698 array_verify (EV_A_ (W *)forks, forkcnt);
1699#endif
1700
1701#if EV_ASYNC_ENABLE
1702 assert (asyncmax >= asynccnt);
1703 array_verify (EV_A_ (W *)asyncs, asynccnt);
1704#endif
1705
1706 assert (preparemax >= preparecnt);
1707 array_verify (EV_A_ (W *)prepares, preparecnt);
1708
1709 assert (checkmax >= checkcnt);
1710 array_verify (EV_A_ (W *)checks, checkcnt);
1711
1712# if 0
1713 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1714 for (signum = signalmax; signum--; ) if (signals [signum].gotsig)
1120#endif 1715# endif
1716#endif
1717}
1718
1719#endif /* multiplicity */
1121 1720
1122#if EV_MULTIPLICITY 1721#if EV_MULTIPLICITY
1123struct ev_loop * 1722struct ev_loop *
1124ev_default_loop_init (unsigned int flags) 1723ev_default_loop_init (unsigned int flags)
1125#else 1724#else
1126int 1725int
1127ev_default_loop (unsigned int flags) 1726ev_default_loop (unsigned int flags)
1128#endif 1727#endif
1129{ 1728{
1130 if (sigpipe [0] == sigpipe [1])
1131 if (pipe (sigpipe))
1132 return 0;
1133
1134 if (!ev_default_loop_ptr) 1729 if (!ev_default_loop_ptr)
1135 { 1730 {
1136#if EV_MULTIPLICITY 1731#if EV_MULTIPLICITY
1137 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1732 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1138#else 1733#else
… …
1141 1736
1142 loop_init (EV_A_ flags); 1737 loop_init (EV_A_ flags);
1143 1738
1144 if (ev_backend (EV_A)) 1739 if (ev_backend (EV_A))
1145 { 1740 {
1146 siginit (EV_A);
1147
1148#ifndef _WIN32 1741#ifndef _WIN32
1149 ev_signal_init (&childev, childcb, SIGCHLD); 1742 ev_signal_init (&childev, childcb, SIGCHLD);
1150 ev_set_priority (&childev, EV_MAXPRI); 1743 ev_set_priority (&childev, EV_MAXPRI);
1151 ev_signal_start (EV_A_ &childev); 1744 ev_signal_start (EV_A_ &childev);
1152 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1745 ev_unref (EV_A); /* child watcher should not keep loop alive */
… …
1164{ 1757{
1165#if EV_MULTIPLICITY 1758#if EV_MULTIPLICITY
1166 struct ev_loop *loop = ev_default_loop_ptr; 1759 struct ev_loop *loop = ev_default_loop_ptr;
1167#endif 1760#endif
1168 1761
1762 ev_default_loop_ptr = 0;
1763
1169#ifndef _WIN32 1764#ifndef _WIN32
1170 ev_ref (EV_A); /* child watcher */ 1765 ev_ref (EV_A); /* child watcher */
1171 ev_signal_stop (EV_A_ &childev); 1766 ev_signal_stop (EV_A_ &childev);
1172#endif 1767#endif
1173 1768
1174 ev_ref (EV_A); /* signal watcher */
1175 ev_io_stop (EV_A_ &sigev);
1176
1177 close (sigpipe [0]); sigpipe [0] = 0;
1178 close (sigpipe [1]); sigpipe [1] = 0;
1179
1180 loop_destroy (EV_A); 1769 loop_destroy (EV_A);
1181} 1770}
1182 1771
1183void 1772void
1184ev_default_fork (void) 1773ev_default_fork (void)
1185{ 1774{
1186#if EV_MULTIPLICITY 1775#if EV_MULTIPLICITY
1187 struct ev_loop *loop = ev_default_loop_ptr; 1776 struct ev_loop *loop = ev_default_loop_ptr;
1188#endif 1777#endif
1189 1778
1190 if (backend) 1779 postfork = 1; /* must be in line with ev_loop_fork */
1191 postfork = 1;
1192} 1780}
1193 1781
1194/*****************************************************************************/ 1782/*****************************************************************************/
1195 1783
1196void 1784void
1197ev_invoke (EV_P_ void *w, int revents) 1785ev_invoke (EV_P_ void *w, int revents)
1198{ 1786{
1199 EV_CB_INVOKE ((W)w, revents); 1787 EV_CB_INVOKE ((W)w, revents);
1200} 1788}
1201 1789
1202void inline_speed 1790inline_speed void
1203call_pending (EV_P) 1791call_pending (EV_P)
1204{ 1792{
1205 int pri; 1793 int pri;
1206 1794
1207 for (pri = NUMPRI; pri--; ) 1795 for (pri = NUMPRI; pri--; )
1208 while (pendingcnt [pri]) 1796 while (pendingcnt [pri])
1209 { 1797 {
1210 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 1798 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1211 1799
1212 if (expect_true (p->w))
1213 {
1214 /*assert (("non-pending watcher on pending list", p->w->pending));*/ 1800 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
1801 /* ^ this is no longer true, as pending_w could be here */
1215 1802
1216 p->w->pending = 0; 1803 p->w->pending = 0;
1217 EV_CB_INVOKE (p->w, p->events); 1804 EV_CB_INVOKE (p->w, p->events);
1218 } 1805 EV_FREQUENT_CHECK;
1219 } 1806 }
1220} 1807}
1221 1808
1222void inline_size
1223timers_reify (EV_P)
1224{
1225 while (timercnt && ((WT)timers [0])->at <= mn_now)
1226 {
1227 ev_timer *w = (ev_timer *)timers [0];
1228
1229 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1230
1231 /* first reschedule or stop timer */
1232 if (w->repeat)
1233 {
1234 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1235
1236 ((WT)w)->at += w->repeat;
1237 if (((WT)w)->at < mn_now)
1238 ((WT)w)->at = mn_now;
1239
1240 downheap (timers, timercnt, 0);
1241 }
1242 else
1243 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1244
1245 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1246 }
1247}
1248
1249#if EV_PERIODIC_ENABLE
1250void inline_size
1251periodics_reify (EV_P)
1252{
1253 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1254 {
1255 ev_periodic *w = (ev_periodic *)periodics [0];
1256
1257 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1258
1259 /* first reschedule or stop timer */
1260 if (w->reschedule_cb)
1261 {
1262 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1263 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1264 downheap (periodics, periodiccnt, 0);
1265 }
1266 else if (w->interval)
1267 {
1268 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1269 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1270 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1271 downheap (periodics, periodiccnt, 0);
1272 }
1273 else
1274 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1275
1276 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1277 }
1278}
1279
1280static void noinline
1281periodics_reschedule (EV_P)
1282{
1283 int i;
1284
1285 /* adjust periodics after time jump */
1286 for (i = 0; i < periodiccnt; ++i)
1287 {
1288 ev_periodic *w = (ev_periodic *)periodics [i];
1289
1290 if (w->reschedule_cb)
1291 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1292 else if (w->interval)
1293 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1294 }
1295
1296 /* now rebuild the heap */
1297 for (i = periodiccnt >> 1; i--; )
1298 downheap (periodics, periodiccnt, i);
1299}
1300#endif
1301
1302#if EV_IDLE_ENABLE 1809#if EV_IDLE_ENABLE
1303void inline_size 1810/* make idle watchers pending. this handles the "call-idle */
1811/* only when higher priorities are idle" logic */
1812inline_size void
1304idle_reify (EV_P) 1813idle_reify (EV_P)
1305{ 1814{
1306 if (expect_false (idleall)) 1815 if (expect_false (idleall))
1307 { 1816 {
1308 int pri; 1817 int pri;
… …
1320 } 1829 }
1321 } 1830 }
1322} 1831}
1323#endif 1832#endif
1324 1833
1325void inline_speed 1834/* make timers pending */
1835inline_size void
1836timers_reify (EV_P)
1837{
1838 EV_FREQUENT_CHECK;
1839
1840 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1841 {
1842 do
1843 {
1844 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
1845
1846 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
1847
1848 /* first reschedule or stop timer */
1849 if (w->repeat)
1850 {
1851 ev_at (w) += w->repeat;
1852 if (ev_at (w) < mn_now)
1853 ev_at (w) = mn_now;
1854
1855 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1856
1857 ANHE_at_cache (timers [HEAP0]);
1858 downheap (timers, timercnt, HEAP0);
1859 }
1860 else
1861 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1862
1863 EV_FREQUENT_CHECK;
1864 feed_reverse (EV_A_ (W)w);
1865 }
1866 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1867
1868 feed_reverse_done (EV_A_ EV_TIMEOUT);
1869 }
1870}
1871
1872#if EV_PERIODIC_ENABLE
1873/* make periodics pending */
1874inline_size void
1875periodics_reify (EV_P)
1876{
1877 EV_FREQUENT_CHECK;
1878
1879 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1880 {
1881 int feed_count = 0;
1882
1883 do
1884 {
1885 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1886
1887 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1888
1889 /* first reschedule or stop timer */
1890 if (w->reschedule_cb)
1891 {
1892 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1893
1894 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1895
1896 ANHE_at_cache (periodics [HEAP0]);
1897 downheap (periodics, periodiccnt, HEAP0);
1898 }
1899 else if (w->interval)
1900 {
1901 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1902 /* if next trigger time is not sufficiently in the future, put it there */
1903 /* this might happen because of floating point inexactness */
1904 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1905 {
1906 ev_at (w) += w->interval;
1907
1908 /* if interval is unreasonably low we might still have a time in the past */
1909 /* so correct this. this will make the periodic very inexact, but the user */
1910 /* has effectively asked to get triggered more often than possible */
1911 if (ev_at (w) < ev_rt_now)
1912 ev_at (w) = ev_rt_now;
1913 }
1914
1915 ANHE_at_cache (periodics [HEAP0]);
1916 downheap (periodics, periodiccnt, HEAP0);
1917 }
1918 else
1919 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1920
1921 EV_FREQUENT_CHECK;
1922 feed_reverse (EV_A_ (W)w);
1923 }
1924 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1925
1926 feed_reverse_done (EV_A_ EV_PERIODIC);
1927 }
1928}
1929
1930/* simply recalculate all periodics */
1931/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1932static void noinline
1933periodics_reschedule (EV_P)
1934{
1935 int i;
1936
1937 /* adjust periodics after time jump */
1938 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1939 {
1940 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1941
1942 if (w->reschedule_cb)
1943 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1944 else if (w->interval)
1945 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1946
1947 ANHE_at_cache (periodics [i]);
1948 }
1949
1950 reheap (periodics, periodiccnt);
1951}
1952#endif
1953
1954/* adjust all timers by a given offset */
1955static void noinline
1956timers_reschedule (EV_P_ ev_tstamp adjust)
1957{
1958 int i;
1959
1960 for (i = 0; i < timercnt; ++i)
1961 {
1962 ANHE *he = timers + i + HEAP0;
1963 ANHE_w (*he)->at += adjust;
1964 ANHE_at_cache (*he);
1965 }
1966}
1967
1968/* fetch new monotonic and realtime times from the kernel */
1969/* also detetc if there was a timejump, and act accordingly */
1970inline_speed void
1326time_update (EV_P_ ev_tstamp max_block) 1971time_update (EV_P_ ev_tstamp max_block)
1327{ 1972{
1328 int i;
1329
1330#if EV_USE_MONOTONIC 1973#if EV_USE_MONOTONIC
1331 if (expect_true (have_monotonic)) 1974 if (expect_true (have_monotonic))
1332 { 1975 {
1976 int i;
1333 ev_tstamp odiff = rtmn_diff; 1977 ev_tstamp odiff = rtmn_diff;
1334 1978
1335 mn_now = get_clock (); 1979 mn_now = get_clock ();
1336 1980
1337 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 1981 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1355 */ 1999 */
1356 for (i = 4; --i; ) 2000 for (i = 4; --i; )
1357 { 2001 {
1358 rtmn_diff = ev_rt_now - mn_now; 2002 rtmn_diff = ev_rt_now - mn_now;
1359 2003
1360 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2004 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1361 return; /* all is well */ 2005 return; /* all is well */
1362 2006
1363 ev_rt_now = ev_time (); 2007 ev_rt_now = ev_time ();
1364 mn_now = get_clock (); 2008 mn_now = get_clock ();
1365 now_floor = mn_now; 2009 now_floor = mn_now;
1366 } 2010 }
1367 2011
2012 /* no timer adjustment, as the monotonic clock doesn't jump */
2013 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1368# if EV_PERIODIC_ENABLE 2014# if EV_PERIODIC_ENABLE
1369 periodics_reschedule (EV_A); 2015 periodics_reschedule (EV_A);
1370# endif 2016# endif
1371 /* no timer adjustment, as the monotonic clock doesn't jump */
1372 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1373 } 2017 }
1374 else 2018 else
1375#endif 2019#endif
1376 { 2020 {
1377 ev_rt_now = ev_time (); 2021 ev_rt_now = ev_time ();
1378 2022
1379 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 2023 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1380 { 2024 {
2025 /* adjust timers. this is easy, as the offset is the same for all of them */
2026 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1381#if EV_PERIODIC_ENABLE 2027#if EV_PERIODIC_ENABLE
1382 periodics_reschedule (EV_A); 2028 periodics_reschedule (EV_A);
1383#endif 2029#endif
1384 /* adjust timers. this is easy, as the offset is the same for all of them */
1385 for (i = 0; i < timercnt; ++i)
1386 ((WT)timers [i])->at += ev_rt_now - mn_now;
1387 } 2030 }
1388 2031
1389 mn_now = ev_rt_now; 2032 mn_now = ev_rt_now;
1390 } 2033 }
1391} 2034}
1392 2035
1393void 2036void
1394ev_ref (EV_P)
1395{
1396 ++activecnt;
1397}
1398
1399void
1400ev_unref (EV_P)
1401{
1402 --activecnt;
1403}
1404
1405static int loop_done;
1406
1407void
1408ev_loop (EV_P_ int flags) 2037ev_loop (EV_P_ int flags)
1409{ 2038{
1410 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2039 ++loop_depth;
1411 ? EVUNLOOP_ONE 2040
1412 : EVUNLOOP_CANCEL; 2041 loop_done = EVUNLOOP_CANCEL;
1413 2042
1414 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2043 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1415 2044
1416 do 2045 do
1417 { 2046 {
2047#if EV_VERIFY >= 2
2048 ev_loop_verify (EV_A);
2049#endif
2050
1418#ifndef _WIN32 2051#ifndef _WIN32
1419 if (expect_false (curpid)) /* penalise the forking check even more */ 2052 if (expect_false (curpid)) /* penalise the forking check even more */
1420 if (expect_false (getpid () != curpid)) 2053 if (expect_false (getpid () != curpid))
1421 { 2054 {
1422 curpid = getpid (); 2055 curpid = getpid ();
… …
1439 { 2072 {
1440 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2073 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1441 call_pending (EV_A); 2074 call_pending (EV_A);
1442 } 2075 }
1443 2076
1444 if (expect_false (!activecnt))
1445 break;
1446
1447 /* we might have forked, so reify kernel state if necessary */ 2077 /* we might have forked, so reify kernel state if necessary */
1448 if (expect_false (postfork)) 2078 if (expect_false (postfork))
1449 loop_fork (EV_A); 2079 loop_fork (EV_A);
1450 2080
1451 /* update fd-related kernel structures */ 2081 /* update fd-related kernel structures */
1452 fd_reify (EV_A); 2082 fd_reify (EV_A);
1453 2083
1454 /* calculate blocking time */ 2084 /* calculate blocking time */
1455 { 2085 {
1456 ev_tstamp block; 2086 ev_tstamp waittime = 0.;
2087 ev_tstamp sleeptime = 0.;
1457 2088
1458 if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt)) 2089 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1459 block = 0.; /* do not block at all */
1460 else
1461 { 2090 {
2091 /* remember old timestamp for io_blocktime calculation */
2092 ev_tstamp prev_mn_now = mn_now;
2093
1462 /* update time to cancel out callback processing overhead */ 2094 /* update time to cancel out callback processing overhead */
1463 time_update (EV_A_ 1e100); 2095 time_update (EV_A_ 1e100);
1464 2096
1465 block = MAX_BLOCKTIME; 2097 waittime = MAX_BLOCKTIME;
1466 2098
1467 if (timercnt) 2099 if (timercnt)
1468 { 2100 {
1469 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 2101 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1470 if (block > to) block = to; 2102 if (waittime > to) waittime = to;
1471 } 2103 }
1472 2104
1473#if EV_PERIODIC_ENABLE 2105#if EV_PERIODIC_ENABLE
1474 if (periodiccnt) 2106 if (periodiccnt)
1475 { 2107 {
1476 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 2108 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1477 if (block > to) block = to; 2109 if (waittime > to) waittime = to;
1478 } 2110 }
1479#endif 2111#endif
1480 2112
2113 /* don't let timeouts decrease the waittime below timeout_blocktime */
2114 if (expect_false (waittime < timeout_blocktime))
2115 waittime = timeout_blocktime;
2116
2117 /* extra check because io_blocktime is commonly 0 */
1481 if (expect_false (block < 0.)) block = 0.; 2118 if (expect_false (io_blocktime))
2119 {
2120 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2121
2122 if (sleeptime > waittime - backend_fudge)
2123 sleeptime = waittime - backend_fudge;
2124
2125 if (expect_true (sleeptime > 0.))
2126 {
2127 ev_sleep (sleeptime);
2128 waittime -= sleeptime;
2129 }
2130 }
1482 } 2131 }
1483 2132
1484 ++loop_count; 2133 ++loop_count;
1485 backend_poll (EV_A_ block); 2134 backend_poll (EV_A_ waittime);
1486 2135
1487 /* update ev_rt_now, do magic */ 2136 /* update ev_rt_now, do magic */
1488 time_update (EV_A_ block); 2137 time_update (EV_A_ waittime + sleeptime);
1489 } 2138 }
1490 2139
1491 /* queue pending timers and reschedule them */ 2140 /* queue pending timers and reschedule them */
1492 timers_reify (EV_A); /* relative timers called last */ 2141 timers_reify (EV_A); /* relative timers called last */
1493#if EV_PERIODIC_ENABLE 2142#if EV_PERIODIC_ENABLE
… …
1502 /* queue check watchers, to be executed first */ 2151 /* queue check watchers, to be executed first */
1503 if (expect_false (checkcnt)) 2152 if (expect_false (checkcnt))
1504 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2153 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1505 2154
1506 call_pending (EV_A); 2155 call_pending (EV_A);
1507
1508 } 2156 }
1509 while (expect_true (activecnt && !loop_done)); 2157 while (expect_true (
2158 activecnt
2159 && !loop_done
2160 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2161 ));
1510 2162
1511 if (loop_done == EVUNLOOP_ONE) 2163 if (loop_done == EVUNLOOP_ONE)
1512 loop_done = EVUNLOOP_CANCEL; 2164 loop_done = EVUNLOOP_CANCEL;
2165
2166 --loop_depth;
1513} 2167}
1514 2168
1515void 2169void
1516ev_unloop (EV_P_ int how) 2170ev_unloop (EV_P_ int how)
1517{ 2171{
1518 loop_done = how; 2172 loop_done = how;
1519} 2173}
1520 2174
2175void
2176ev_ref (EV_P)
2177{
2178 ++activecnt;
2179}
2180
2181void
2182ev_unref (EV_P)
2183{
2184 --activecnt;
2185}
2186
2187void
2188ev_now_update (EV_P)
2189{
2190 time_update (EV_A_ 1e100);
2191}
2192
2193void
2194ev_suspend (EV_P)
2195{
2196 ev_now_update (EV_A);
2197}
2198
2199void
2200ev_resume (EV_P)
2201{
2202 ev_tstamp mn_prev = mn_now;
2203
2204 ev_now_update (EV_A);
2205 timers_reschedule (EV_A_ mn_now - mn_prev);
2206#if EV_PERIODIC_ENABLE
2207 /* TODO: really do this? */
2208 periodics_reschedule (EV_A);
2209#endif
2210}
2211
1521/*****************************************************************************/ 2212/*****************************************************************************/
2213/* singly-linked list management, used when the expected list length is short */
1522 2214
1523void inline_size 2215inline_size void
1524wlist_add (WL *head, WL elem) 2216wlist_add (WL *head, WL elem)
1525{ 2217{
1526 elem->next = *head; 2218 elem->next = *head;
1527 *head = elem; 2219 *head = elem;
1528} 2220}
1529 2221
1530void inline_size 2222inline_size void
1531wlist_del (WL *head, WL elem) 2223wlist_del (WL *head, WL elem)
1532{ 2224{
1533 while (*head) 2225 while (*head)
1534 { 2226 {
1535 if (*head == elem) 2227 if (*head == elem)
… …
1540 2232
1541 head = &(*head)->next; 2233 head = &(*head)->next;
1542 } 2234 }
1543} 2235}
1544 2236
1545void inline_speed 2237/* internal, faster, version of ev_clear_pending */
2238inline_speed void
1546clear_pending (EV_P_ W w) 2239clear_pending (EV_P_ W w)
1547{ 2240{
1548 if (w->pending) 2241 if (w->pending)
1549 { 2242 {
1550 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2243 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1551 w->pending = 0; 2244 w->pending = 0;
1552 } 2245 }
1553} 2246}
1554 2247
1555int 2248int
… …
1559 int pending = w_->pending; 2252 int pending = w_->pending;
1560 2253
1561 if (expect_true (pending)) 2254 if (expect_true (pending))
1562 { 2255 {
1563 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 2256 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2257 p->w = (W)&pending_w;
1564 w_->pending = 0; 2258 w_->pending = 0;
1565 p->w = 0;
1566 return p->events; 2259 return p->events;
1567 } 2260 }
1568 else 2261 else
1569 return 0; 2262 return 0;
1570} 2263}
1571 2264
1572void inline_size 2265inline_size void
1573pri_adjust (EV_P_ W w) 2266pri_adjust (EV_P_ W w)
1574{ 2267{
1575 int pri = w->priority; 2268 int pri = ev_priority (w);
1576 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 2269 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1577 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 2270 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1578 w->priority = pri; 2271 ev_set_priority (w, pri);
1579} 2272}
1580 2273
1581void inline_speed 2274inline_speed void
1582ev_start (EV_P_ W w, int active) 2275ev_start (EV_P_ W w, int active)
1583{ 2276{
1584 pri_adjust (EV_A_ w); 2277 pri_adjust (EV_A_ w);
1585 w->active = active; 2278 w->active = active;
1586 ev_ref (EV_A); 2279 ev_ref (EV_A);
1587} 2280}
1588 2281
1589void inline_size 2282inline_size void
1590ev_stop (EV_P_ W w) 2283ev_stop (EV_P_ W w)
1591{ 2284{
1592 ev_unref (EV_A); 2285 ev_unref (EV_A);
1593 w->active = 0; 2286 w->active = 0;
1594} 2287}
… …
1601 int fd = w->fd; 2294 int fd = w->fd;
1602 2295
1603 if (expect_false (ev_is_active (w))) 2296 if (expect_false (ev_is_active (w)))
1604 return; 2297 return;
1605 2298
1606 assert (("ev_io_start called with negative fd", fd >= 0)); 2299 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2300 assert (("libev: ev_io start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2301
2302 EV_FREQUENT_CHECK;
1607 2303
1608 ev_start (EV_A_ (W)w, 1); 2304 ev_start (EV_A_ (W)w, 1);
1609 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2305 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1610 wlist_add (&anfds[fd].head, (WL)w); 2306 wlist_add (&anfds[fd].head, (WL)w);
1611 2307
1612 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 2308 fd_change (EV_A_ fd, w->events & EV__IOFDSET | 1);
1613 w->events &= ~EV_IOFDSET; 2309 w->events &= ~EV__IOFDSET;
2310
2311 EV_FREQUENT_CHECK;
1614} 2312}
1615 2313
1616void noinline 2314void noinline
1617ev_io_stop (EV_P_ ev_io *w) 2315ev_io_stop (EV_P_ ev_io *w)
1618{ 2316{
1619 clear_pending (EV_A_ (W)w); 2317 clear_pending (EV_A_ (W)w);
1620 if (expect_false (!ev_is_active (w))) 2318 if (expect_false (!ev_is_active (w)))
1621 return; 2319 return;
1622 2320
1623 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2321 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2322
2323 EV_FREQUENT_CHECK;
1624 2324
1625 wlist_del (&anfds[w->fd].head, (WL)w); 2325 wlist_del (&anfds[w->fd].head, (WL)w);
1626 ev_stop (EV_A_ (W)w); 2326 ev_stop (EV_A_ (W)w);
1627 2327
1628 fd_change (EV_A_ w->fd, 1); 2328 fd_change (EV_A_ w->fd, 1);
2329
2330 EV_FREQUENT_CHECK;
1629} 2331}
1630 2332
1631void noinline 2333void noinline
1632ev_timer_start (EV_P_ ev_timer *w) 2334ev_timer_start (EV_P_ ev_timer *w)
1633{ 2335{
1634 if (expect_false (ev_is_active (w))) 2336 if (expect_false (ev_is_active (w)))
1635 return; 2337 return;
1636 2338
1637 ((WT)w)->at += mn_now; 2339 ev_at (w) += mn_now;
1638 2340
1639 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2341 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1640 2342
2343 EV_FREQUENT_CHECK;
2344
2345 ++timercnt;
1641 ev_start (EV_A_ (W)w, ++timercnt); 2346 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1642 array_needsize (WT, timers, timermax, timercnt, EMPTY2); 2347 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1643 timers [timercnt - 1] = (WT)w; 2348 ANHE_w (timers [ev_active (w)]) = (WT)w;
1644 upheap (timers, timercnt - 1); 2349 ANHE_at_cache (timers [ev_active (w)]);
2350 upheap (timers, ev_active (w));
1645 2351
2352 EV_FREQUENT_CHECK;
2353
1646 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 2354 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1647} 2355}
1648 2356
1649void noinline 2357void noinline
1650ev_timer_stop (EV_P_ ev_timer *w) 2358ev_timer_stop (EV_P_ ev_timer *w)
1651{ 2359{
1652 clear_pending (EV_A_ (W)w); 2360 clear_pending (EV_A_ (W)w);
1653 if (expect_false (!ev_is_active (w))) 2361 if (expect_false (!ev_is_active (w)))
1654 return; 2362 return;
1655 2363
1656 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w)); 2364 EV_FREQUENT_CHECK;
1657 2365
1658 { 2366 {
1659 int active = ((W)w)->active; 2367 int active = ev_active (w);
1660 2368
2369 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2370
2371 --timercnt;
2372
1661 if (expect_true (--active < --timercnt)) 2373 if (expect_true (active < timercnt + HEAP0))
1662 { 2374 {
1663 timers [active] = timers [timercnt]; 2375 timers [active] = timers [timercnt + HEAP0];
1664 adjustheap (timers, timercnt, active); 2376 adjustheap (timers, timercnt, active);
1665 } 2377 }
1666 } 2378 }
1667 2379
1668 ((WT)w)->at -= mn_now; 2380 EV_FREQUENT_CHECK;
2381
2382 ev_at (w) -= mn_now;
1669 2383
1670 ev_stop (EV_A_ (W)w); 2384 ev_stop (EV_A_ (W)w);
1671} 2385}
1672 2386
1673void noinline 2387void noinline
1674ev_timer_again (EV_P_ ev_timer *w) 2388ev_timer_again (EV_P_ ev_timer *w)
1675{ 2389{
2390 EV_FREQUENT_CHECK;
2391
1676 if (ev_is_active (w)) 2392 if (ev_is_active (w))
1677 { 2393 {
1678 if (w->repeat) 2394 if (w->repeat)
1679 { 2395 {
1680 ((WT)w)->at = mn_now + w->repeat; 2396 ev_at (w) = mn_now + w->repeat;
2397 ANHE_at_cache (timers [ev_active (w)]);
1681 adjustheap (timers, timercnt, ((W)w)->active - 1); 2398 adjustheap (timers, timercnt, ev_active (w));
1682 } 2399 }
1683 else 2400 else
1684 ev_timer_stop (EV_A_ w); 2401 ev_timer_stop (EV_A_ w);
1685 } 2402 }
1686 else if (w->repeat) 2403 else if (w->repeat)
1687 { 2404 {
1688 w->at = w->repeat; 2405 ev_at (w) = w->repeat;
1689 ev_timer_start (EV_A_ w); 2406 ev_timer_start (EV_A_ w);
1690 } 2407 }
2408
2409 EV_FREQUENT_CHECK;
1691} 2410}
1692 2411
1693#if EV_PERIODIC_ENABLE 2412#if EV_PERIODIC_ENABLE
1694void noinline 2413void noinline
1695ev_periodic_start (EV_P_ ev_periodic *w) 2414ev_periodic_start (EV_P_ ev_periodic *w)
1696{ 2415{
1697 if (expect_false (ev_is_active (w))) 2416 if (expect_false (ev_is_active (w)))
1698 return; 2417 return;
1699 2418
1700 if (w->reschedule_cb) 2419 if (w->reschedule_cb)
1701 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2420 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1702 else if (w->interval) 2421 else if (w->interval)
1703 { 2422 {
1704 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2423 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1705 /* this formula differs from the one in periodic_reify because we do not always round up */ 2424 /* this formula differs from the one in periodic_reify because we do not always round up */
1706 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 2425 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1707 } 2426 }
1708 else 2427 else
1709 ((WT)w)->at = w->offset; 2428 ev_at (w) = w->offset;
1710 2429
2430 EV_FREQUENT_CHECK;
2431
2432 ++periodiccnt;
1711 ev_start (EV_A_ (W)w, ++periodiccnt); 2433 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1712 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2); 2434 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1713 periodics [periodiccnt - 1] = (WT)w; 2435 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1714 upheap (periodics, periodiccnt - 1); 2436 ANHE_at_cache (periodics [ev_active (w)]);
2437 upheap (periodics, ev_active (w));
1715 2438
2439 EV_FREQUENT_CHECK;
2440
1716 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 2441 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1717} 2442}
1718 2443
1719void noinline 2444void noinline
1720ev_periodic_stop (EV_P_ ev_periodic *w) 2445ev_periodic_stop (EV_P_ ev_periodic *w)
1721{ 2446{
1722 clear_pending (EV_A_ (W)w); 2447 clear_pending (EV_A_ (W)w);
1723 if (expect_false (!ev_is_active (w))) 2448 if (expect_false (!ev_is_active (w)))
1724 return; 2449 return;
1725 2450
1726 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w)); 2451 EV_FREQUENT_CHECK;
1727 2452
1728 { 2453 {
1729 int active = ((W)w)->active; 2454 int active = ev_active (w);
1730 2455
2456 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2457
2458 --periodiccnt;
2459
1731 if (expect_true (--active < --periodiccnt)) 2460 if (expect_true (active < periodiccnt + HEAP0))
1732 { 2461 {
1733 periodics [active] = periodics [periodiccnt]; 2462 periodics [active] = periodics [periodiccnt + HEAP0];
1734 adjustheap (periodics, periodiccnt, active); 2463 adjustheap (periodics, periodiccnt, active);
1735 } 2464 }
1736 } 2465 }
1737 2466
2467 EV_FREQUENT_CHECK;
2468
1738 ev_stop (EV_A_ (W)w); 2469 ev_stop (EV_A_ (W)w);
1739} 2470}
1740 2471
1741void noinline 2472void noinline
1742ev_periodic_again (EV_P_ ev_periodic *w) 2473ev_periodic_again (EV_P_ ev_periodic *w)
… …
1753 2484
1754void noinline 2485void noinline
1755ev_signal_start (EV_P_ ev_signal *w) 2486ev_signal_start (EV_P_ ev_signal *w)
1756{ 2487{
1757#if EV_MULTIPLICITY 2488#if EV_MULTIPLICITY
1758 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 2489 assert (("libev: signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1759#endif 2490#endif
1760 if (expect_false (ev_is_active (w))) 2491 if (expect_false (ev_is_active (w)))
1761 return; 2492 return;
1762 2493
1763 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2494 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0));
2495
2496 evpipe_init (EV_A);
2497
2498 EV_FREQUENT_CHECK;
1764 2499
1765 { 2500 {
1766#ifndef _WIN32 2501#ifndef _WIN32
1767 sigset_t full, prev; 2502 sigset_t full, prev;
1768 sigfillset (&full); 2503 sigfillset (&full);
1769 sigprocmask (SIG_SETMASK, &full, &prev); 2504 sigprocmask (SIG_SETMASK, &full, &prev);
1770#endif 2505#endif
1771 2506
1772 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 2507 array_needsize (ANSIG, signals, signalmax, w->signum, array_init_zero);
1773 2508
1774#ifndef _WIN32 2509#ifndef _WIN32
1775 sigprocmask (SIG_SETMASK, &prev, 0); 2510 sigprocmask (SIG_SETMASK, &prev, 0);
1776#endif 2511#endif
1777 } 2512 }
… …
1780 wlist_add (&signals [w->signum - 1].head, (WL)w); 2515 wlist_add (&signals [w->signum - 1].head, (WL)w);
1781 2516
1782 if (!((WL)w)->next) 2517 if (!((WL)w)->next)
1783 { 2518 {
1784#if _WIN32 2519#if _WIN32
1785 signal (w->signum, sighandler); 2520 signal (w->signum, ev_sighandler);
1786#else 2521#else
1787 struct sigaction sa; 2522 struct sigaction sa;
1788 sa.sa_handler = sighandler; 2523 sa.sa_handler = ev_sighandler;
1789 sigfillset (&sa.sa_mask); 2524 sigfillset (&sa.sa_mask);
1790 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2525 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1791 sigaction (w->signum, &sa, 0); 2526 sigaction (w->signum, &sa, 0);
1792#endif 2527#endif
1793 } 2528 }
2529
2530 EV_FREQUENT_CHECK;
1794} 2531}
1795 2532
1796void noinline 2533void noinline
1797ev_signal_stop (EV_P_ ev_signal *w) 2534ev_signal_stop (EV_P_ ev_signal *w)
1798{ 2535{
1799 clear_pending (EV_A_ (W)w); 2536 clear_pending (EV_A_ (W)w);
1800 if (expect_false (!ev_is_active (w))) 2537 if (expect_false (!ev_is_active (w)))
1801 return; 2538 return;
1802 2539
2540 EV_FREQUENT_CHECK;
2541
1803 wlist_del (&signals [w->signum - 1].head, (WL)w); 2542 wlist_del (&signals [w->signum - 1].head, (WL)w);
1804 ev_stop (EV_A_ (W)w); 2543 ev_stop (EV_A_ (W)w);
1805 2544
1806 if (!signals [w->signum - 1].head) 2545 if (!signals [w->signum - 1].head)
1807 signal (w->signum, SIG_DFL); 2546 signal (w->signum, SIG_DFL);
2547
2548 EV_FREQUENT_CHECK;
1808} 2549}
1809 2550
1810void 2551void
1811ev_child_start (EV_P_ ev_child *w) 2552ev_child_start (EV_P_ ev_child *w)
1812{ 2553{
1813#if EV_MULTIPLICITY 2554#if EV_MULTIPLICITY
1814 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 2555 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1815#endif 2556#endif
1816 if (expect_false (ev_is_active (w))) 2557 if (expect_false (ev_is_active (w)))
1817 return; 2558 return;
1818 2559
2560 EV_FREQUENT_CHECK;
2561
1819 ev_start (EV_A_ (W)w, 1); 2562 ev_start (EV_A_ (W)w, 1);
1820 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 2563 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2564
2565 EV_FREQUENT_CHECK;
1821} 2566}
1822 2567
1823void 2568void
1824ev_child_stop (EV_P_ ev_child *w) 2569ev_child_stop (EV_P_ ev_child *w)
1825{ 2570{
1826 clear_pending (EV_A_ (W)w); 2571 clear_pending (EV_A_ (W)w);
1827 if (expect_false (!ev_is_active (w))) 2572 if (expect_false (!ev_is_active (w)))
1828 return; 2573 return;
1829 2574
2575 EV_FREQUENT_CHECK;
2576
1830 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 2577 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1831 ev_stop (EV_A_ (W)w); 2578 ev_stop (EV_A_ (W)w);
2579
2580 EV_FREQUENT_CHECK;
1832} 2581}
1833 2582
1834#if EV_STAT_ENABLE 2583#if EV_STAT_ENABLE
1835 2584
1836# ifdef _WIN32 2585# ifdef _WIN32
1837# undef lstat 2586# undef lstat
1838# define lstat(a,b) _stati64 (a,b) 2587# define lstat(a,b) _stati64 (a,b)
1839# endif 2588# endif
1840 2589
1841#define DEF_STAT_INTERVAL 5.0074891 2590#define DEF_STAT_INTERVAL 5.0074891
2591#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1842#define MIN_STAT_INTERVAL 0.1074891 2592#define MIN_STAT_INTERVAL 0.1074891
1843 2593
1844static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 2594static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1845 2595
1846#if EV_USE_INOTIFY 2596#if EV_USE_INOTIFY
1847# define EV_INOTIFY_BUFSIZE 8192 2597# define EV_INOTIFY_BUFSIZE 8192
… …
1851{ 2601{
1852 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); 2602 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);
1853 2603
1854 if (w->wd < 0) 2604 if (w->wd < 0)
1855 { 2605 {
2606 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1856 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 2607 ev_timer_again (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1857 2608
1858 /* monitor some parent directory for speedup hints */ 2609 /* monitor some parent directory for speedup hints */
2610 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2611 /* but an efficiency issue only */
1859 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 2612 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1860 { 2613 {
1861 char path [4096]; 2614 char path [4096];
1862 strcpy (path, w->path); 2615 strcpy (path, w->path);
1863 2616
… …
1866 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 2619 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1867 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 2620 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1868 2621
1869 char *pend = strrchr (path, '/'); 2622 char *pend = strrchr (path, '/');
1870 2623
1871 if (!pend) 2624 if (!pend || pend == path)
1872 break; /* whoops, no '/', complain to your admin */ 2625 break;
1873 2626
1874 *pend = 0; 2627 *pend = 0;
1875 w->wd = inotify_add_watch (fs_fd, path, mask); 2628 w->wd = inotify_add_watch (fs_fd, path, mask);
1876 } 2629 }
1877 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 2630 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1878 } 2631 }
1879 } 2632 }
1880 else
1881 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1882 2633
1883 if (w->wd >= 0) 2634 if (w->wd >= 0)
2635 {
1884 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 2636 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2637
2638 /* now local changes will be tracked by inotify, but remote changes won't */
2639 /* unless the filesystem it known to be local, we therefore still poll */
2640 /* also do poll on <2.6.25, but with normal frequency */
2641 struct statfs sfs;
2642
2643 if (fs_2625 && !statfs (w->path, &sfs))
2644 if (sfs.f_type == 0x1373 /* devfs */
2645 || sfs.f_type == 0xEF53 /* ext2/3 */
2646 || sfs.f_type == 0x3153464a /* jfs */
2647 || sfs.f_type == 0x52654973 /* reiser3 */
2648 || sfs.f_type == 0x01021994 /* tempfs */
2649 || sfs.f_type == 0x58465342 /* xfs */)
2650 return;
2651
2652 w->timer.repeat = w->interval ? w->interval : fs_2625 ? NFS_STAT_INTERVAL : DEF_STAT_INTERVAL;
2653 ev_timer_again (EV_A_ &w->timer);
2654 }
1885} 2655}
1886 2656
1887static void noinline 2657static void noinline
1888infy_del (EV_P_ ev_stat *w) 2658infy_del (EV_P_ ev_stat *w)
1889{ 2659{
… …
1903 2673
1904static void noinline 2674static void noinline
1905infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 2675infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1906{ 2676{
1907 if (slot < 0) 2677 if (slot < 0)
1908 /* overflow, need to check for all hahs slots */ 2678 /* overflow, need to check for all hash slots */
1909 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 2679 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
1910 infy_wd (EV_A_ slot, wd, ev); 2680 infy_wd (EV_A_ slot, wd, ev);
1911 else 2681 else
1912 { 2682 {
1913 WL w_; 2683 WL w_;
… …
1919 2689
1920 if (w->wd == wd || wd == -1) 2690 if (w->wd == wd || wd == -1)
1921 { 2691 {
1922 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 2692 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1923 { 2693 {
2694 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
1924 w->wd = -1; 2695 w->wd = -1;
1925 infy_add (EV_A_ w); /* re-add, no matter what */ 2696 infy_add (EV_A_ w); /* re-add, no matter what */
1926 } 2697 }
1927 2698
1928 stat_timer_cb (EV_A_ &w->timer, 0); 2699 stat_timer_cb (EV_A_ &w->timer, 0);
… …
1941 2712
1942 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 2713 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
1943 infy_wd (EV_A_ ev->wd, ev->wd, ev); 2714 infy_wd (EV_A_ ev->wd, ev->wd, ev);
1944} 2715}
1945 2716
1946void inline_size 2717inline_size void
2718check_2625 (EV_P)
2719{
2720 /* kernels < 2.6.25 are borked
2721 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
2722 */
2723 struct utsname buf;
2724 int major, minor, micro;
2725
2726 if (uname (&buf))
2727 return;
2728
2729 if (sscanf (buf.release, "%d.%d.%d", &major, &minor, &micro) != 3)
2730 return;
2731
2732 if (major < 2
2733 || (major == 2 && minor < 6)
2734 || (major == 2 && minor == 6 && micro < 25))
2735 return;
2736
2737 fs_2625 = 1;
2738}
2739
2740inline_size void
1947infy_init (EV_P) 2741infy_init (EV_P)
1948{ 2742{
1949 if (fs_fd != -2) 2743 if (fs_fd != -2)
1950 return; 2744 return;
2745
2746 fs_fd = -1;
2747
2748 check_2625 (EV_A);
1951 2749
1952 fs_fd = inotify_init (); 2750 fs_fd = inotify_init ();
1953 2751
1954 if (fs_fd >= 0) 2752 if (fs_fd >= 0)
1955 { 2753 {
… …
1957 ev_set_priority (&fs_w, EV_MAXPRI); 2755 ev_set_priority (&fs_w, EV_MAXPRI);
1958 ev_io_start (EV_A_ &fs_w); 2756 ev_io_start (EV_A_ &fs_w);
1959 } 2757 }
1960} 2758}
1961 2759
1962void inline_size 2760inline_size void
1963infy_fork (EV_P) 2761infy_fork (EV_P)
1964{ 2762{
1965 int slot; 2763 int slot;
1966 2764
1967 if (fs_fd < 0) 2765 if (fs_fd < 0)
… …
1983 w->wd = -1; 2781 w->wd = -1;
1984 2782
1985 if (fs_fd >= 0) 2783 if (fs_fd >= 0)
1986 infy_add (EV_A_ w); /* re-add, no matter what */ 2784 infy_add (EV_A_ w); /* re-add, no matter what */
1987 else 2785 else
1988 ev_timer_start (EV_A_ &w->timer); 2786 ev_timer_again (EV_A_ &w->timer);
1989 } 2787 }
1990
1991 } 2788 }
1992} 2789}
1993 2790
2791#endif
2792
2793#ifdef _WIN32
2794# define EV_LSTAT(p,b) _stati64 (p, b)
2795#else
2796# define EV_LSTAT(p,b) lstat (p, b)
1994#endif 2797#endif
1995 2798
1996void 2799void
1997ev_stat_stat (EV_P_ ev_stat *w) 2800ev_stat_stat (EV_P_ ev_stat *w)
1998{ 2801{
… …
2025 || w->prev.st_atime != w->attr.st_atime 2828 || w->prev.st_atime != w->attr.st_atime
2026 || w->prev.st_mtime != w->attr.st_mtime 2829 || w->prev.st_mtime != w->attr.st_mtime
2027 || w->prev.st_ctime != w->attr.st_ctime 2830 || w->prev.st_ctime != w->attr.st_ctime
2028 ) { 2831 ) {
2029 #if EV_USE_INOTIFY 2832 #if EV_USE_INOTIFY
2833 if (fs_fd >= 0)
2834 {
2030 infy_del (EV_A_ w); 2835 infy_del (EV_A_ w);
2031 infy_add (EV_A_ w); 2836 infy_add (EV_A_ w);
2032 ev_stat_stat (EV_A_ w); /* avoid race... */ 2837 ev_stat_stat (EV_A_ w); /* avoid race... */
2838 }
2033 #endif 2839 #endif
2034 2840
2035 ev_feed_event (EV_A_ w, EV_STAT); 2841 ev_feed_event (EV_A_ w, EV_STAT);
2036 } 2842 }
2037} 2843}
… …
2040ev_stat_start (EV_P_ ev_stat *w) 2846ev_stat_start (EV_P_ ev_stat *w)
2041{ 2847{
2042 if (expect_false (ev_is_active (w))) 2848 if (expect_false (ev_is_active (w)))
2043 return; 2849 return;
2044 2850
2045 /* since we use memcmp, we need to clear any padding data etc. */
2046 memset (&w->prev, 0, sizeof (ev_statdata));
2047 memset (&w->attr, 0, sizeof (ev_statdata));
2048
2049 ev_stat_stat (EV_A_ w); 2851 ev_stat_stat (EV_A_ w);
2050 2852
2853 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2051 if (w->interval < MIN_STAT_INTERVAL) 2854 w->interval = MIN_STAT_INTERVAL;
2052 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2053 2855
2054 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 2856 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2055 ev_set_priority (&w->timer, ev_priority (w)); 2857 ev_set_priority (&w->timer, ev_priority (w));
2056 2858
2057#if EV_USE_INOTIFY 2859#if EV_USE_INOTIFY
2058 infy_init (EV_A); 2860 infy_init (EV_A);
2059 2861
2060 if (fs_fd >= 0) 2862 if (fs_fd >= 0)
2061 infy_add (EV_A_ w); 2863 infy_add (EV_A_ w);
2062 else 2864 else
2063#endif 2865#endif
2064 ev_timer_start (EV_A_ &w->timer); 2866 ev_timer_again (EV_A_ &w->timer);
2065 2867
2066 ev_start (EV_A_ (W)w, 1); 2868 ev_start (EV_A_ (W)w, 1);
2869
2870 EV_FREQUENT_CHECK;
2067} 2871}
2068 2872
2069void 2873void
2070ev_stat_stop (EV_P_ ev_stat *w) 2874ev_stat_stop (EV_P_ ev_stat *w)
2071{ 2875{
2072 clear_pending (EV_A_ (W)w); 2876 clear_pending (EV_A_ (W)w);
2073 if (expect_false (!ev_is_active (w))) 2877 if (expect_false (!ev_is_active (w)))
2074 return; 2878 return;
2075 2879
2880 EV_FREQUENT_CHECK;
2881
2076#if EV_USE_INOTIFY 2882#if EV_USE_INOTIFY
2077 infy_del (EV_A_ w); 2883 infy_del (EV_A_ w);
2078#endif 2884#endif
2079 ev_timer_stop (EV_A_ &w->timer); 2885 ev_timer_stop (EV_A_ &w->timer);
2080 2886
2081 ev_stop (EV_A_ (W)w); 2887 ev_stop (EV_A_ (W)w);
2888
2889 EV_FREQUENT_CHECK;
2082} 2890}
2083#endif 2891#endif
2084 2892
2085#if EV_IDLE_ENABLE 2893#if EV_IDLE_ENABLE
2086void 2894void
… …
2088{ 2896{
2089 if (expect_false (ev_is_active (w))) 2897 if (expect_false (ev_is_active (w)))
2090 return; 2898 return;
2091 2899
2092 pri_adjust (EV_A_ (W)w); 2900 pri_adjust (EV_A_ (W)w);
2901
2902 EV_FREQUENT_CHECK;
2093 2903
2094 { 2904 {
2095 int active = ++idlecnt [ABSPRI (w)]; 2905 int active = ++idlecnt [ABSPRI (w)];
2096 2906
2097 ++idleall; 2907 ++idleall;
2098 ev_start (EV_A_ (W)w, active); 2908 ev_start (EV_A_ (W)w, active);
2099 2909
2100 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 2910 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2101 idles [ABSPRI (w)][active - 1] = w; 2911 idles [ABSPRI (w)][active - 1] = w;
2102 } 2912 }
2913
2914 EV_FREQUENT_CHECK;
2103} 2915}
2104 2916
2105void 2917void
2106ev_idle_stop (EV_P_ ev_idle *w) 2918ev_idle_stop (EV_P_ ev_idle *w)
2107{ 2919{
2108 clear_pending (EV_A_ (W)w); 2920 clear_pending (EV_A_ (W)w);
2109 if (expect_false (!ev_is_active (w))) 2921 if (expect_false (!ev_is_active (w)))
2110 return; 2922 return;
2111 2923
2924 EV_FREQUENT_CHECK;
2925
2112 { 2926 {
2113 int active = ((W)w)->active; 2927 int active = ev_active (w);
2114 2928
2115 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 2929 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2116 ((W)idles [ABSPRI (w)][active - 1])->active = active; 2930 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2117 2931
2118 ev_stop (EV_A_ (W)w); 2932 ev_stop (EV_A_ (W)w);
2119 --idleall; 2933 --idleall;
2120 } 2934 }
2935
2936 EV_FREQUENT_CHECK;
2121} 2937}
2122#endif 2938#endif
2123 2939
2124void 2940void
2125ev_prepare_start (EV_P_ ev_prepare *w) 2941ev_prepare_start (EV_P_ ev_prepare *w)
2126{ 2942{
2127 if (expect_false (ev_is_active (w))) 2943 if (expect_false (ev_is_active (w)))
2128 return; 2944 return;
2945
2946 EV_FREQUENT_CHECK;
2129 2947
2130 ev_start (EV_A_ (W)w, ++preparecnt); 2948 ev_start (EV_A_ (W)w, ++preparecnt);
2131 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 2949 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2132 prepares [preparecnt - 1] = w; 2950 prepares [preparecnt - 1] = w;
2951
2952 EV_FREQUENT_CHECK;
2133} 2953}
2134 2954
2135void 2955void
2136ev_prepare_stop (EV_P_ ev_prepare *w) 2956ev_prepare_stop (EV_P_ ev_prepare *w)
2137{ 2957{
2138 clear_pending (EV_A_ (W)w); 2958 clear_pending (EV_A_ (W)w);
2139 if (expect_false (!ev_is_active (w))) 2959 if (expect_false (!ev_is_active (w)))
2140 return; 2960 return;
2141 2961
2962 EV_FREQUENT_CHECK;
2963
2142 { 2964 {
2143 int active = ((W)w)->active; 2965 int active = ev_active (w);
2966
2144 prepares [active - 1] = prepares [--preparecnt]; 2967 prepares [active - 1] = prepares [--preparecnt];
2145 ((W)prepares [active - 1])->active = active; 2968 ev_active (prepares [active - 1]) = active;
2146 } 2969 }
2147 2970
2148 ev_stop (EV_A_ (W)w); 2971 ev_stop (EV_A_ (W)w);
2972
2973 EV_FREQUENT_CHECK;
2149} 2974}
2150 2975
2151void 2976void
2152ev_check_start (EV_P_ ev_check *w) 2977ev_check_start (EV_P_ ev_check *w)
2153{ 2978{
2154 if (expect_false (ev_is_active (w))) 2979 if (expect_false (ev_is_active (w)))
2155 return; 2980 return;
2981
2982 EV_FREQUENT_CHECK;
2156 2983
2157 ev_start (EV_A_ (W)w, ++checkcnt); 2984 ev_start (EV_A_ (W)w, ++checkcnt);
2158 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 2985 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2159 checks [checkcnt - 1] = w; 2986 checks [checkcnt - 1] = w;
2987
2988 EV_FREQUENT_CHECK;
2160} 2989}
2161 2990
2162void 2991void
2163ev_check_stop (EV_P_ ev_check *w) 2992ev_check_stop (EV_P_ ev_check *w)
2164{ 2993{
2165 clear_pending (EV_A_ (W)w); 2994 clear_pending (EV_A_ (W)w);
2166 if (expect_false (!ev_is_active (w))) 2995 if (expect_false (!ev_is_active (w)))
2167 return; 2996 return;
2168 2997
2998 EV_FREQUENT_CHECK;
2999
2169 { 3000 {
2170 int active = ((W)w)->active; 3001 int active = ev_active (w);
3002
2171 checks [active - 1] = checks [--checkcnt]; 3003 checks [active - 1] = checks [--checkcnt];
2172 ((W)checks [active - 1])->active = active; 3004 ev_active (checks [active - 1]) = active;
2173 } 3005 }
2174 3006
2175 ev_stop (EV_A_ (W)w); 3007 ev_stop (EV_A_ (W)w);
3008
3009 EV_FREQUENT_CHECK;
2176} 3010}
2177 3011
2178#if EV_EMBED_ENABLE 3012#if EV_EMBED_ENABLE
2179void noinline 3013void noinline
2180ev_embed_sweep (EV_P_ ev_embed *w) 3014ev_embed_sweep (EV_P_ ev_embed *w)
2181{ 3015{
2182 ev_loop (w->loop, EVLOOP_NONBLOCK); 3016 ev_loop (w->other, EVLOOP_NONBLOCK);
2183} 3017}
2184 3018
2185static void 3019static void
2186embed_cb (EV_P_ ev_io *io, int revents) 3020embed_io_cb (EV_P_ ev_io *io, int revents)
2187{ 3021{
2188 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3022 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2189 3023
2190 if (ev_cb (w)) 3024 if (ev_cb (w))
2191 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3025 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2192 else 3026 else
2193 ev_embed_sweep (loop, w); 3027 ev_loop (w->other, EVLOOP_NONBLOCK);
2194} 3028}
3029
3030static void
3031embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3032{
3033 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3034
3035 {
3036 struct ev_loop *loop = w->other;
3037
3038 while (fdchangecnt)
3039 {
3040 fd_reify (EV_A);
3041 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3042 }
3043 }
3044}
3045
3046static void
3047embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3048{
3049 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3050
3051 ev_embed_stop (EV_A_ w);
3052
3053 {
3054 struct ev_loop *loop = w->other;
3055
3056 ev_loop_fork (EV_A);
3057 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3058 }
3059
3060 ev_embed_start (EV_A_ w);
3061}
3062
3063#if 0
3064static void
3065embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3066{
3067 ev_idle_stop (EV_A_ idle);
3068}
3069#endif
2195 3070
2196void 3071void
2197ev_embed_start (EV_P_ ev_embed *w) 3072ev_embed_start (EV_P_ ev_embed *w)
2198{ 3073{
2199 if (expect_false (ev_is_active (w))) 3074 if (expect_false (ev_is_active (w)))
2200 return; 3075 return;
2201 3076
2202 { 3077 {
2203 struct ev_loop *loop = w->loop; 3078 struct ev_loop *loop = w->other;
2204 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 3079 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2205 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 3080 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2206 } 3081 }
3082
3083 EV_FREQUENT_CHECK;
2207 3084
2208 ev_set_priority (&w->io, ev_priority (w)); 3085 ev_set_priority (&w->io, ev_priority (w));
2209 ev_io_start (EV_A_ &w->io); 3086 ev_io_start (EV_A_ &w->io);
2210 3087
3088 ev_prepare_init (&w->prepare, embed_prepare_cb);
3089 ev_set_priority (&w->prepare, EV_MINPRI);
3090 ev_prepare_start (EV_A_ &w->prepare);
3091
3092 ev_fork_init (&w->fork, embed_fork_cb);
3093 ev_fork_start (EV_A_ &w->fork);
3094
3095 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3096
2211 ev_start (EV_A_ (W)w, 1); 3097 ev_start (EV_A_ (W)w, 1);
3098
3099 EV_FREQUENT_CHECK;
2212} 3100}
2213 3101
2214void 3102void
2215ev_embed_stop (EV_P_ ev_embed *w) 3103ev_embed_stop (EV_P_ ev_embed *w)
2216{ 3104{
2217 clear_pending (EV_A_ (W)w); 3105 clear_pending (EV_A_ (W)w);
2218 if (expect_false (!ev_is_active (w))) 3106 if (expect_false (!ev_is_active (w)))
2219 return; 3107 return;
2220 3108
3109 EV_FREQUENT_CHECK;
3110
2221 ev_io_stop (EV_A_ &w->io); 3111 ev_io_stop (EV_A_ &w->io);
3112 ev_prepare_stop (EV_A_ &w->prepare);
3113 ev_fork_stop (EV_A_ &w->fork);
2222 3114
2223 ev_stop (EV_A_ (W)w); 3115 EV_FREQUENT_CHECK;
2224} 3116}
2225#endif 3117#endif
2226 3118
2227#if EV_FORK_ENABLE 3119#if EV_FORK_ENABLE
2228void 3120void
2229ev_fork_start (EV_P_ ev_fork *w) 3121ev_fork_start (EV_P_ ev_fork *w)
2230{ 3122{
2231 if (expect_false (ev_is_active (w))) 3123 if (expect_false (ev_is_active (w)))
2232 return; 3124 return;
3125
3126 EV_FREQUENT_CHECK;
2233 3127
2234 ev_start (EV_A_ (W)w, ++forkcnt); 3128 ev_start (EV_A_ (W)w, ++forkcnt);
2235 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 3129 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2236 forks [forkcnt - 1] = w; 3130 forks [forkcnt - 1] = w;
3131
3132 EV_FREQUENT_CHECK;
2237} 3133}
2238 3134
2239void 3135void
2240ev_fork_stop (EV_P_ ev_fork *w) 3136ev_fork_stop (EV_P_ ev_fork *w)
2241{ 3137{
2242 clear_pending (EV_A_ (W)w); 3138 clear_pending (EV_A_ (W)w);
2243 if (expect_false (!ev_is_active (w))) 3139 if (expect_false (!ev_is_active (w)))
2244 return; 3140 return;
2245 3141
3142 EV_FREQUENT_CHECK;
3143
2246 { 3144 {
2247 int active = ((W)w)->active; 3145 int active = ev_active (w);
3146
2248 forks [active - 1] = forks [--forkcnt]; 3147 forks [active - 1] = forks [--forkcnt];
2249 ((W)forks [active - 1])->active = active; 3148 ev_active (forks [active - 1]) = active;
2250 } 3149 }
2251 3150
2252 ev_stop (EV_A_ (W)w); 3151 ev_stop (EV_A_ (W)w);
3152
3153 EV_FREQUENT_CHECK;
3154}
3155#endif
3156
3157#if EV_ASYNC_ENABLE
3158void
3159ev_async_start (EV_P_ ev_async *w)
3160{
3161 if (expect_false (ev_is_active (w)))
3162 return;
3163
3164 evpipe_init (EV_A);
3165
3166 EV_FREQUENT_CHECK;
3167
3168 ev_start (EV_A_ (W)w, ++asynccnt);
3169 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3170 asyncs [asynccnt - 1] = w;
3171
3172 EV_FREQUENT_CHECK;
3173}
3174
3175void
3176ev_async_stop (EV_P_ ev_async *w)
3177{
3178 clear_pending (EV_A_ (W)w);
3179 if (expect_false (!ev_is_active (w)))
3180 return;
3181
3182 EV_FREQUENT_CHECK;
3183
3184 {
3185 int active = ev_active (w);
3186
3187 asyncs [active - 1] = asyncs [--asynccnt];
3188 ev_active (asyncs [active - 1]) = active;
3189 }
3190
3191 ev_stop (EV_A_ (W)w);
3192
3193 EV_FREQUENT_CHECK;
3194}
3195
3196void
3197ev_async_send (EV_P_ ev_async *w)
3198{
3199 w->sent = 1;
3200 evpipe_write (EV_A_ &gotasync);
2253} 3201}
2254#endif 3202#endif
2255 3203
2256/*****************************************************************************/ 3204/*****************************************************************************/
2257 3205
… …
2267once_cb (EV_P_ struct ev_once *once, int revents) 3215once_cb (EV_P_ struct ev_once *once, int revents)
2268{ 3216{
2269 void (*cb)(int revents, void *arg) = once->cb; 3217 void (*cb)(int revents, void *arg) = once->cb;
2270 void *arg = once->arg; 3218 void *arg = once->arg;
2271 3219
2272 ev_io_stop (EV_A_ &once->io); 3220 ev_io_stop (EV_A_ &once->io);
2273 ev_timer_stop (EV_A_ &once->to); 3221 ev_timer_stop (EV_A_ &once->to);
2274 ev_free (once); 3222 ev_free (once);
2275 3223
2276 cb (revents, arg); 3224 cb (revents, arg);
2277} 3225}
2278 3226
2279static void 3227static void
2280once_cb_io (EV_P_ ev_io *w, int revents) 3228once_cb_io (EV_P_ ev_io *w, int revents)
2281{ 3229{
2282 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3230 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3231
3232 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2283} 3233}
2284 3234
2285static void 3235static void
2286once_cb_to (EV_P_ ev_timer *w, int revents) 3236once_cb_to (EV_P_ ev_timer *w, int revents)
2287{ 3237{
2288 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3238 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3239
3240 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2289} 3241}
2290 3242
2291void 3243void
2292ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3244ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2293{ 3245{
… …
2315 ev_timer_set (&once->to, timeout, 0.); 3267 ev_timer_set (&once->to, timeout, 0.);
2316 ev_timer_start (EV_A_ &once->to); 3268 ev_timer_start (EV_A_ &once->to);
2317 } 3269 }
2318} 3270}
2319 3271
3272/*****************************************************************************/
3273
3274#if EV_WALK_ENABLE
3275void
3276ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3277{
3278 int i, j;
3279 ev_watcher_list *wl, *wn;
3280
3281 if (types & (EV_IO | EV_EMBED))
3282 for (i = 0; i < anfdmax; ++i)
3283 for (wl = anfds [i].head; wl; )
3284 {
3285 wn = wl->next;
3286
3287#if EV_EMBED_ENABLE
3288 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3289 {
3290 if (types & EV_EMBED)
3291 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3292 }
3293 else
3294#endif
3295#if EV_USE_INOTIFY
3296 if (ev_cb ((ev_io *)wl) == infy_cb)
3297 ;
3298 else
3299#endif
3300 if ((ev_io *)wl != &pipe_w)
3301 if (types & EV_IO)
3302 cb (EV_A_ EV_IO, wl);
3303
3304 wl = wn;
3305 }
3306
3307 if (types & (EV_TIMER | EV_STAT))
3308 for (i = timercnt + HEAP0; i-- > HEAP0; )
3309#if EV_STAT_ENABLE
3310 /*TODO: timer is not always active*/
3311 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3312 {
3313 if (types & EV_STAT)
3314 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3315 }
3316 else
3317#endif
3318 if (types & EV_TIMER)
3319 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3320
3321#if EV_PERIODIC_ENABLE
3322 if (types & EV_PERIODIC)
3323 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3324 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3325#endif
3326
3327#if EV_IDLE_ENABLE
3328 if (types & EV_IDLE)
3329 for (j = NUMPRI; i--; )
3330 for (i = idlecnt [j]; i--; )
3331 cb (EV_A_ EV_IDLE, idles [j][i]);
3332#endif
3333
3334#if EV_FORK_ENABLE
3335 if (types & EV_FORK)
3336 for (i = forkcnt; i--; )
3337 if (ev_cb (forks [i]) != embed_fork_cb)
3338 cb (EV_A_ EV_FORK, forks [i]);
3339#endif
3340
3341#if EV_ASYNC_ENABLE
3342 if (types & EV_ASYNC)
3343 for (i = asynccnt; i--; )
3344 cb (EV_A_ EV_ASYNC, asyncs [i]);
3345#endif
3346
3347 if (types & EV_PREPARE)
3348 for (i = preparecnt; i--; )
3349#if EV_EMBED_ENABLE
3350 if (ev_cb (prepares [i]) != embed_prepare_cb)
3351#endif
3352 cb (EV_A_ EV_PREPARE, prepares [i]);
3353
3354 if (types & EV_CHECK)
3355 for (i = checkcnt; i--; )
3356 cb (EV_A_ EV_CHECK, checks [i]);
3357
3358 if (types & EV_SIGNAL)
3359 for (i = 0; i < signalmax; ++i)
3360 for (wl = signals [i].head; wl; )
3361 {
3362 wn = wl->next;
3363 cb (EV_A_ EV_SIGNAL, wl);
3364 wl = wn;
3365 }
3366
3367 if (types & EV_CHILD)
3368 for (i = EV_PID_HASHSIZE; i--; )
3369 for (wl = childs [i]; wl; )
3370 {
3371 wn = wl->next;
3372 cb (EV_A_ EV_CHILD, wl);
3373 wl = wn;
3374 }
3375/* EV_STAT 0x00001000 /* stat data changed */
3376/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3377}
3378#endif
3379
3380#if EV_MULTIPLICITY
3381 #include "ev_wrap.h"
3382#endif
3383
2320#ifdef __cplusplus 3384#ifdef __cplusplus
2321} 3385}
2322#endif 3386#endif
2323 3387

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