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Comparing libev/ev.c (file contents):
Revision 1.172 by root, Sun Dec 9 02:27:44 2007 UTC vs.
Revision 1.334 by root, Tue Mar 9 09:00:59 2010 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) 2007,2008,2009,2010 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
56# endif 79# endif
57# endif 80# endif
58 81
82# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
84# define EV_USE_NANOSLEEP 1
85# else
86# define EV_USE_NANOSLEEP 0
87# endif
88# endif
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
61# define EV_USE_SELECT 1 92# define EV_USE_SELECT 1
62# else 93# else
63# define EV_USE_SELECT 0 94# define EV_USE_SELECT 0
… …
79# define EV_USE_EPOLL 0 110# define EV_USE_EPOLL 0
80# endif 111# endif
81# endif 112# endif
82 113
83# ifndef EV_USE_KQUEUE 114# ifndef EV_USE_KQUEUE
84# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 115# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
85# define EV_USE_KQUEUE 1 116# define EV_USE_KQUEUE 1
86# else 117# else
87# define EV_USE_KQUEUE 0 118# define EV_USE_KQUEUE 0
88# endif 119# endif
89# endif 120# endif
… …
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_SIGNALFD
139# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
140# define EV_USE_SIGNALFD 1
141# else
142# define EV_USE_SIGNALFD 0
143# endif
144# endif
145
146# ifndef EV_USE_EVENTFD
147# if HAVE_EVENTFD
148# define EV_USE_EVENTFD 1
149# else
150# define EV_USE_EVENTFD 0
151# endif
152# endif
153
107#endif 154#endif
108 155
109#include <math.h> 156#include <math.h>
110#include <stdlib.h> 157#include <stdlib.h>
158#include <string.h>
111#include <fcntl.h> 159#include <fcntl.h>
112#include <stddef.h> 160#include <stddef.h>
113 161
114#include <stdio.h> 162#include <stdio.h>
115 163
116#include <assert.h> 164#include <assert.h>
117#include <errno.h> 165#include <errno.h>
118#include <sys/types.h> 166#include <sys/types.h>
119#include <time.h> 167#include <time.h>
168#include <limits.h>
120 169
121#include <signal.h> 170#include <signal.h>
122 171
123#ifdef EV_H 172#ifdef EV_H
124# include EV_H 173# include EV_H
… …
129#ifndef _WIN32 178#ifndef _WIN32
130# include <sys/time.h> 179# include <sys/time.h>
131# include <sys/wait.h> 180# include <sys/wait.h>
132# include <unistd.h> 181# include <unistd.h>
133#else 182#else
183# include <io.h>
134# define WIN32_LEAN_AND_MEAN 184# define WIN32_LEAN_AND_MEAN
135# include <windows.h> 185# include <windows.h>
136# ifndef EV_SELECT_IS_WINSOCKET 186# ifndef EV_SELECT_IS_WINSOCKET
137# define EV_SELECT_IS_WINSOCKET 1 187# define EV_SELECT_IS_WINSOCKET 1
138# endif 188# endif
189# undef EV_AVOID_STDIO
190#endif
191
192/* this block tries to deduce configuration from header-defined symbols and defaults */
193
194/* try to deduce the maximum number of signals on this platform */
195#if defined (EV_NSIG)
196/* use what's provided */
197#elif defined (NSIG)
198# define EV_NSIG (NSIG)
199#elif defined(_NSIG)
200# define EV_NSIG (_NSIG)
201#elif defined (SIGMAX)
202# define EV_NSIG (SIGMAX+1)
203#elif defined (SIG_MAX)
204# define EV_NSIG (SIG_MAX+1)
205#elif defined (_SIG_MAX)
206# define EV_NSIG (_SIG_MAX+1)
207#elif defined (MAXSIG)
208# define EV_NSIG (MAXSIG+1)
209#elif defined (MAX_SIG)
210# define EV_NSIG (MAX_SIG+1)
211#elif defined (SIGARRAYSIZE)
212# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */
213#elif defined (_sys_nsig)
214# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
215#else
216# error "unable to find value for NSIG, please report"
217/* to make it compile regardless, just remove the above line */
218# define EV_NSIG 65
219#endif
220
221#ifndef EV_USE_CLOCK_SYSCALL
222# if __linux && __GLIBC__ >= 2
223# define EV_USE_CLOCK_SYSCALL 1
224# else
225# define EV_USE_CLOCK_SYSCALL 0
139#endif 226# endif
140 227#endif
141/**/
142 228
143#ifndef EV_USE_MONOTONIC 229#ifndef EV_USE_MONOTONIC
230# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
231# define EV_USE_MONOTONIC 1
232# else
144# define EV_USE_MONOTONIC 0 233# define EV_USE_MONOTONIC 0
234# endif
145#endif 235#endif
146 236
147#ifndef EV_USE_REALTIME 237#ifndef EV_USE_REALTIME
148# define EV_USE_REALTIME 0 238# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
239#endif
240
241#ifndef EV_USE_NANOSLEEP
242# if _POSIX_C_SOURCE >= 199309L
243# define EV_USE_NANOSLEEP 1
244# else
245# define EV_USE_NANOSLEEP 0
246# endif
149#endif 247#endif
150 248
151#ifndef EV_USE_SELECT 249#ifndef EV_USE_SELECT
152# define EV_USE_SELECT 1 250# define EV_USE_SELECT 1
153#endif 251#endif
… …
159# define EV_USE_POLL 1 257# define EV_USE_POLL 1
160# endif 258# endif
161#endif 259#endif
162 260
163#ifndef EV_USE_EPOLL 261#ifndef EV_USE_EPOLL
262# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
263# define EV_USE_EPOLL 1
264# else
164# define EV_USE_EPOLL 0 265# define EV_USE_EPOLL 0
266# endif
165#endif 267#endif
166 268
167#ifndef EV_USE_KQUEUE 269#ifndef EV_USE_KQUEUE
168# define EV_USE_KQUEUE 0 270# define EV_USE_KQUEUE 0
169#endif 271#endif
… …
171#ifndef EV_USE_PORT 273#ifndef EV_USE_PORT
172# define EV_USE_PORT 0 274# define EV_USE_PORT 0
173#endif 275#endif
174 276
175#ifndef EV_USE_INOTIFY 277#ifndef EV_USE_INOTIFY
278# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
279# define EV_USE_INOTIFY 1
280# else
176# define EV_USE_INOTIFY 0 281# define EV_USE_INOTIFY 0
282# endif
177#endif 283#endif
178 284
179#ifndef EV_PID_HASHSIZE 285#ifndef EV_PID_HASHSIZE
180# if EV_MINIMAL 286# if EV_MINIMAL
181# define EV_PID_HASHSIZE 1 287# define EV_PID_HASHSIZE 1
… …
190# else 296# else
191# define EV_INOTIFY_HASHSIZE 16 297# define EV_INOTIFY_HASHSIZE 16
192# endif 298# endif
193#endif 299#endif
194 300
195/**/ 301#ifndef EV_USE_EVENTFD
302# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
303# define EV_USE_EVENTFD 1
304# else
305# define EV_USE_EVENTFD 0
306# endif
307#endif
308
309#ifndef EV_USE_SIGNALFD
310# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
311# define EV_USE_SIGNALFD 1
312# else
313# define EV_USE_SIGNALFD 0
314# endif
315#endif
316
317#if 0 /* debugging */
318# define EV_VERIFY 3
319# define EV_USE_4HEAP 1
320# define EV_HEAP_CACHE_AT 1
321#endif
322
323#ifndef EV_VERIFY
324# define EV_VERIFY !EV_MINIMAL
325#endif
326
327#ifndef EV_USE_4HEAP
328# define EV_USE_4HEAP !EV_MINIMAL
329#endif
330
331#ifndef EV_HEAP_CACHE_AT
332# define EV_HEAP_CACHE_AT !EV_MINIMAL
333#endif
334
335/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
336/* which makes programs even slower. might work on other unices, too. */
337#if EV_USE_CLOCK_SYSCALL
338# include <syscall.h>
339# ifdef SYS_clock_gettime
340# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
341# undef EV_USE_MONOTONIC
342# define EV_USE_MONOTONIC 1
343# else
344# undef EV_USE_CLOCK_SYSCALL
345# define EV_USE_CLOCK_SYSCALL 0
346# endif
347#endif
348
349/* this block fixes any misconfiguration where we know we run into trouble otherwise */
350
351#ifdef _AIX
352/* AIX has a completely broken poll.h header */
353# undef EV_USE_POLL
354# define EV_USE_POLL 0
355#endif
196 356
197#ifndef CLOCK_MONOTONIC 357#ifndef CLOCK_MONOTONIC
198# undef EV_USE_MONOTONIC 358# undef EV_USE_MONOTONIC
199# define EV_USE_MONOTONIC 0 359# define EV_USE_MONOTONIC 0
200#endif 360#endif
… …
202#ifndef CLOCK_REALTIME 362#ifndef CLOCK_REALTIME
203# undef EV_USE_REALTIME 363# undef EV_USE_REALTIME
204# define EV_USE_REALTIME 0 364# define EV_USE_REALTIME 0
205#endif 365#endif
206 366
367#if !EV_STAT_ENABLE
368# undef EV_USE_INOTIFY
369# define EV_USE_INOTIFY 0
370#endif
371
372#if !EV_USE_NANOSLEEP
373# ifndef _WIN32
374# include <sys/select.h>
375# endif
376#endif
377
378#if EV_USE_INOTIFY
379# include <sys/utsname.h>
380# include <sys/statfs.h>
381# include <sys/inotify.h>
382/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
383# ifndef IN_DONT_FOLLOW
384# undef EV_USE_INOTIFY
385# define EV_USE_INOTIFY 0
386# endif
387#endif
388
207#if EV_SELECT_IS_WINSOCKET 389#if EV_SELECT_IS_WINSOCKET
208# include <winsock.h> 390# include <winsock.h>
209#endif 391#endif
210 392
211#if !EV_STAT_ENABLE 393#if EV_USE_EVENTFD
212# define EV_USE_INOTIFY 0 394/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
395# include <stdint.h>
396# ifndef EFD_NONBLOCK
397# define EFD_NONBLOCK O_NONBLOCK
213#endif 398# endif
214 399# ifndef EFD_CLOEXEC
215#if EV_USE_INOTIFY 400# ifdef O_CLOEXEC
216# include <sys/inotify.h> 401# define EFD_CLOEXEC O_CLOEXEC
402# else
403# define EFD_CLOEXEC 02000000
404# endif
217#endif 405# endif
406# ifdef __cplusplus
407extern "C" {
408# endif
409int (eventfd) (unsigned int initval, int flags);
410# ifdef __cplusplus
411}
412# endif
413#endif
414
415#if EV_USE_SIGNALFD
416/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
417# include <stdint.h>
418# ifndef SFD_NONBLOCK
419# define SFD_NONBLOCK O_NONBLOCK
420# endif
421# ifndef SFD_CLOEXEC
422# ifdef O_CLOEXEC
423# define SFD_CLOEXEC O_CLOEXEC
424# else
425# define SFD_CLOEXEC 02000000
426# endif
427# endif
428# ifdef __cplusplus
429extern "C" {
430# endif
431int signalfd (int fd, const sigset_t *mask, int flags);
432
433struct signalfd_siginfo
434{
435 uint32_t ssi_signo;
436 char pad[128 - sizeof (uint32_t)];
437};
438# ifdef __cplusplus
439}
440# endif
441#endif
442
218 443
219/**/ 444/**/
445
446#if EV_VERIFY >= 3
447# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
448#else
449# define EV_FREQUENT_CHECK do { } while (0)
450#endif
451
452/*
453 * This is used to avoid floating point rounding problems.
454 * It is added to ev_rt_now when scheduling periodics
455 * to ensure progress, time-wise, even when rounding
456 * errors are against us.
457 * This value is good at least till the year 4000.
458 * Better solutions welcome.
459 */
460#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
220 461
221#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 462#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
222#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 463#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
223/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
224 464
225#if __GNUC__ >= 3 465#if __GNUC__ >= 4
226# define expect(expr,value) __builtin_expect ((expr),(value)) 466# define expect(expr,value) __builtin_expect ((expr),(value))
227# define noinline __attribute__ ((noinline)) 467# define noinline __attribute__ ((noinline))
228#else 468#else
229# define expect(expr,value) (expr) 469# define expect(expr,value) (expr)
230# define noinline 470# define noinline
231# if __STDC_VERSION__ < 199901L 471# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
232# define inline 472# define inline
233# endif 473# endif
234#endif 474#endif
235 475
236#define expect_false(expr) expect ((expr) != 0, 0) 476#define expect_false(expr) expect ((expr) != 0, 0)
… …
241# define inline_speed static noinline 481# define inline_speed static noinline
242#else 482#else
243# define inline_speed static inline 483# define inline_speed static inline
244#endif 484#endif
245 485
246#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 486#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
487
488#if EV_MINPRI == EV_MAXPRI
489# define ABSPRI(w) (((W)w), 0)
490#else
247#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 491# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
492#endif
248 493
249#define EMPTY /* required for microsofts broken pseudo-c compiler */ 494#define EMPTY /* required for microsofts broken pseudo-c compiler */
250#define EMPTY2(a,b) /* used to suppress some warnings */ 495#define EMPTY2(a,b) /* used to suppress some warnings */
251 496
252typedef ev_watcher *W; 497typedef ev_watcher *W;
253typedef ev_watcher_list *WL; 498typedef ev_watcher_list *WL;
254typedef ev_watcher_time *WT; 499typedef ev_watcher_time *WT;
255 500
501#define ev_active(w) ((W)(w))->active
502#define ev_at(w) ((WT)(w))->at
503
504#if EV_USE_REALTIME
505/* sig_atomic_t is used to avoid per-thread variables or locking but still */
506/* giving it a reasonably high chance of working on typical architetcures */
507static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
508#endif
509
510#if EV_USE_MONOTONIC
256static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 511static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
512#endif
513
514#ifndef EV_FD_TO_WIN32_HANDLE
515# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
516#endif
517#ifndef EV_WIN32_HANDLE_TO_FD
518# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
519#endif
520#ifndef EV_WIN32_CLOSE_FD
521# define EV_WIN32_CLOSE_FD(fd) close (fd)
522#endif
257 523
258#ifdef _WIN32 524#ifdef _WIN32
259# include "ev_win32.c" 525# include "ev_win32.c"
260#endif 526#endif
261 527
262/*****************************************************************************/ 528/*****************************************************************************/
263 529
530#if EV_AVOID_STDIO
531static void noinline
532ev_printerr (const char *msg)
533{
534 write (STDERR_FILENO, msg, strlen (msg));
535}
536#endif
537
264static void (*syserr_cb)(const char *msg); 538static void (*syserr_cb)(const char *msg);
265 539
266void 540void
267ev_set_syserr_cb (void (*cb)(const char *msg)) 541ev_set_syserr_cb (void (*cb)(const char *msg))
268{ 542{
269 syserr_cb = cb; 543 syserr_cb = cb;
270} 544}
271 545
272static void noinline 546static void noinline
273syserr (const char *msg) 547ev_syserr (const char *msg)
274{ 548{
275 if (!msg) 549 if (!msg)
276 msg = "(libev) system error"; 550 msg = "(libev) system error";
277 551
278 if (syserr_cb) 552 if (syserr_cb)
279 syserr_cb (msg); 553 syserr_cb (msg);
280 else 554 else
281 { 555 {
556#if EV_AVOID_STDIO
557 const char *err = strerror (errno);
558
559 ev_printerr (msg);
560 ev_printerr (": ");
561 ev_printerr (err);
562 ev_printerr ("\n");
563#else
282 perror (msg); 564 perror (msg);
565#endif
283 abort (); 566 abort ();
284 } 567 }
285} 568}
286 569
570static void *
571ev_realloc_emul (void *ptr, long size)
572{
573#if __GLIBC__
574 return realloc (ptr, size);
575#else
576 /* some systems, notably openbsd and darwin, fail to properly
577 * implement realloc (x, 0) (as required by both ansi c-98 and
578 * the single unix specification, so work around them here.
579 */
580
581 if (size)
582 return realloc (ptr, size);
583
584 free (ptr);
585 return 0;
586#endif
587}
588
287static void *(*alloc)(void *ptr, long size); 589static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
288 590
289void 591void
290ev_set_allocator (void *(*cb)(void *ptr, long size)) 592ev_set_allocator (void *(*cb)(void *ptr, long size))
291{ 593{
292 alloc = cb; 594 alloc = cb;
293} 595}
294 596
295inline_speed void * 597inline_speed void *
296ev_realloc (void *ptr, long size) 598ev_realloc (void *ptr, long size)
297{ 599{
298 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 600 ptr = alloc (ptr, size);
299 601
300 if (!ptr && size) 602 if (!ptr && size)
301 { 603 {
604#if EV_AVOID_STDIO
605 ev_printerr ("libev: memory allocation failed, aborting.\n");
606#else
302 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 607 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
608#endif
303 abort (); 609 abort ();
304 } 610 }
305 611
306 return ptr; 612 return ptr;
307} 613}
… …
309#define ev_malloc(size) ev_realloc (0, (size)) 615#define ev_malloc(size) ev_realloc (0, (size))
310#define ev_free(ptr) ev_realloc ((ptr), 0) 616#define ev_free(ptr) ev_realloc ((ptr), 0)
311 617
312/*****************************************************************************/ 618/*****************************************************************************/
313 619
620/* set in reify when reification needed */
621#define EV_ANFD_REIFY 1
622
623/* file descriptor info structure */
314typedef struct 624typedef struct
315{ 625{
316 WL head; 626 WL head;
317 unsigned char events; 627 unsigned char events; /* the events watched for */
628 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
629 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
318 unsigned char reify; 630 unsigned char unused;
631#if EV_USE_EPOLL
632 unsigned int egen; /* generation counter to counter epoll bugs */
633#endif
319#if EV_SELECT_IS_WINSOCKET 634#if EV_SELECT_IS_WINSOCKET
320 SOCKET handle; 635 SOCKET handle;
321#endif 636#endif
322} ANFD; 637} ANFD;
323 638
639/* stores the pending event set for a given watcher */
324typedef struct 640typedef struct
325{ 641{
326 W w; 642 W w;
327 int events; 643 int events; /* the pending event set for the given watcher */
328} ANPENDING; 644} ANPENDING;
329 645
330#if EV_USE_INOTIFY 646#if EV_USE_INOTIFY
647/* hash table entry per inotify-id */
331typedef struct 648typedef struct
332{ 649{
333 WL head; 650 WL head;
334} ANFS; 651} ANFS;
652#endif
653
654/* Heap Entry */
655#if EV_HEAP_CACHE_AT
656 /* a heap element */
657 typedef struct {
658 ev_tstamp at;
659 WT w;
660 } ANHE;
661
662 #define ANHE_w(he) (he).w /* access watcher, read-write */
663 #define ANHE_at(he) (he).at /* access cached at, read-only */
664 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
665#else
666 /* a heap element */
667 typedef WT ANHE;
668
669 #define ANHE_w(he) (he)
670 #define ANHE_at(he) (he)->at
671 #define ANHE_at_cache(he)
335#endif 672#endif
336 673
337#if EV_MULTIPLICITY 674#if EV_MULTIPLICITY
338 675
339 struct ev_loop 676 struct ev_loop
… …
358 695
359 static int ev_default_loop_ptr; 696 static int ev_default_loop_ptr;
360 697
361#endif 698#endif
362 699
700#if EV_MINIMAL < 2
701# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
702# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
703# define EV_INVOKE_PENDING invoke_cb (EV_A)
704#else
705# define EV_RELEASE_CB (void)0
706# define EV_ACQUIRE_CB (void)0
707# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
708#endif
709
710#define EVUNLOOP_RECURSE 0x80
711
363/*****************************************************************************/ 712/*****************************************************************************/
364 713
714#ifndef EV_HAVE_EV_TIME
365ev_tstamp 715ev_tstamp
366ev_time (void) 716ev_time (void)
367{ 717{
368#if EV_USE_REALTIME 718#if EV_USE_REALTIME
719 if (expect_true (have_realtime))
720 {
369 struct timespec ts; 721 struct timespec ts;
370 clock_gettime (CLOCK_REALTIME, &ts); 722 clock_gettime (CLOCK_REALTIME, &ts);
371 return ts.tv_sec + ts.tv_nsec * 1e-9; 723 return ts.tv_sec + ts.tv_nsec * 1e-9;
372#else 724 }
725#endif
726
373 struct timeval tv; 727 struct timeval tv;
374 gettimeofday (&tv, 0); 728 gettimeofday (&tv, 0);
375 return tv.tv_sec + tv.tv_usec * 1e-6; 729 return tv.tv_sec + tv.tv_usec * 1e-6;
376#endif
377} 730}
731#endif
378 732
379ev_tstamp inline_size 733inline_size ev_tstamp
380get_clock (void) 734get_clock (void)
381{ 735{
382#if EV_USE_MONOTONIC 736#if EV_USE_MONOTONIC
383 if (expect_true (have_monotonic)) 737 if (expect_true (have_monotonic))
384 { 738 {
… …
397{ 751{
398 return ev_rt_now; 752 return ev_rt_now;
399} 753}
400#endif 754#endif
401 755
402int inline_size 756void
757ev_sleep (ev_tstamp delay)
758{
759 if (delay > 0.)
760 {
761#if EV_USE_NANOSLEEP
762 struct timespec ts;
763
764 ts.tv_sec = (time_t)delay;
765 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
766
767 nanosleep (&ts, 0);
768#elif defined(_WIN32)
769 Sleep ((unsigned long)(delay * 1e3));
770#else
771 struct timeval tv;
772
773 tv.tv_sec = (time_t)delay;
774 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
775
776 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
777 /* something not guaranteed by newer posix versions, but guaranteed */
778 /* by older ones */
779 select (0, 0, 0, 0, &tv);
780#endif
781 }
782}
783
784/*****************************************************************************/
785
786#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
787
788/* find a suitable new size for the given array, */
789/* hopefully by rounding to a ncie-to-malloc size */
790inline_size int
403array_nextsize (int elem, int cur, int cnt) 791array_nextsize (int elem, int cur, int cnt)
404{ 792{
405 int ncur = cur + 1; 793 int ncur = cur + 1;
406 794
407 do 795 do
408 ncur <<= 1; 796 ncur <<= 1;
409 while (cnt > ncur); 797 while (cnt > ncur);
410 798
411 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 799 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
412 if (elem * ncur > 4096) 800 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
413 { 801 {
414 ncur *= elem; 802 ncur *= elem;
415 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 803 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
416 ncur = ncur - sizeof (void *) * 4; 804 ncur = ncur - sizeof (void *) * 4;
417 ncur /= elem; 805 ncur /= elem;
418 } 806 }
419 807
420 return ncur; 808 return ncur;
… …
424array_realloc (int elem, void *base, int *cur, int cnt) 812array_realloc (int elem, void *base, int *cur, int cnt)
425{ 813{
426 *cur = array_nextsize (elem, *cur, cnt); 814 *cur = array_nextsize (elem, *cur, cnt);
427 return ev_realloc (base, elem * *cur); 815 return ev_realloc (base, elem * *cur);
428} 816}
817
818#define array_init_zero(base,count) \
819 memset ((void *)(base), 0, sizeof (*(base)) * (count))
429 820
430#define array_needsize(type,base,cur,cnt,init) \ 821#define array_needsize(type,base,cur,cnt,init) \
431 if (expect_false ((cnt) > (cur))) \ 822 if (expect_false ((cnt) > (cur))) \
432 { \ 823 { \
433 int ocur_ = (cur); \ 824 int ocur_ = (cur); \
… …
445 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 836 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
446 } 837 }
447#endif 838#endif
448 839
449#define array_free(stem, idx) \ 840#define array_free(stem, idx) \
450 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 841 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
451 842
452/*****************************************************************************/ 843/*****************************************************************************/
844
845/* dummy callback for pending events */
846static void noinline
847pendingcb (EV_P_ ev_prepare *w, int revents)
848{
849}
453 850
454void noinline 851void noinline
455ev_feed_event (EV_P_ void *w, int revents) 852ev_feed_event (EV_P_ void *w, int revents)
456{ 853{
457 W w_ = (W)w; 854 W w_ = (W)w;
… …
466 pendings [pri][w_->pending - 1].w = w_; 863 pendings [pri][w_->pending - 1].w = w_;
467 pendings [pri][w_->pending - 1].events = revents; 864 pendings [pri][w_->pending - 1].events = revents;
468 } 865 }
469} 866}
470 867
471void inline_size 868inline_speed void
869feed_reverse (EV_P_ W w)
870{
871 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
872 rfeeds [rfeedcnt++] = w;
873}
874
875inline_size void
876feed_reverse_done (EV_P_ int revents)
877{
878 do
879 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
880 while (rfeedcnt);
881}
882
883inline_speed void
472queue_events (EV_P_ W *events, int eventcnt, int type) 884queue_events (EV_P_ W *events, int eventcnt, int type)
473{ 885{
474 int i; 886 int i;
475 887
476 for (i = 0; i < eventcnt; ++i) 888 for (i = 0; i < eventcnt; ++i)
477 ev_feed_event (EV_A_ events [i], type); 889 ev_feed_event (EV_A_ events [i], type);
478} 890}
479 891
480/*****************************************************************************/ 892/*****************************************************************************/
481 893
482void inline_size 894inline_speed void
483anfds_init (ANFD *base, int count)
484{
485 while (count--)
486 {
487 base->head = 0;
488 base->events = EV_NONE;
489 base->reify = 0;
490
491 ++base;
492 }
493}
494
495void inline_speed
496fd_event (EV_P_ int fd, int revents) 895fd_event_nc (EV_P_ int fd, int revents)
497{ 896{
498 ANFD *anfd = anfds + fd; 897 ANFD *anfd = anfds + fd;
499 ev_io *w; 898 ev_io *w;
500 899
501 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 900 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
505 if (ev) 904 if (ev)
506 ev_feed_event (EV_A_ (W)w, ev); 905 ev_feed_event (EV_A_ (W)w, ev);
507 } 906 }
508} 907}
509 908
909/* do not submit kernel events for fds that have reify set */
910/* because that means they changed while we were polling for new events */
911inline_speed void
912fd_event (EV_P_ int fd, int revents)
913{
914 ANFD *anfd = anfds + fd;
915
916 if (expect_true (!anfd->reify))
917 fd_event_nc (EV_A_ fd, revents);
918}
919
510void 920void
511ev_feed_fd_event (EV_P_ int fd, int revents) 921ev_feed_fd_event (EV_P_ int fd, int revents)
512{ 922{
513 if (fd >= 0 && fd < anfdmax) 923 if (fd >= 0 && fd < anfdmax)
514 fd_event (EV_A_ fd, revents); 924 fd_event_nc (EV_A_ fd, revents);
515} 925}
516 926
517void inline_size 927/* make sure the external fd watch events are in-sync */
928/* with the kernel/libev internal state */
929inline_size void
518fd_reify (EV_P) 930fd_reify (EV_P)
519{ 931{
520 int i; 932 int i;
521 933
522 for (i = 0; i < fdchangecnt; ++i) 934 for (i = 0; i < fdchangecnt; ++i)
523 { 935 {
524 int fd = fdchanges [i]; 936 int fd = fdchanges [i];
525 ANFD *anfd = anfds + fd; 937 ANFD *anfd = anfds + fd;
526 ev_io *w; 938 ev_io *w;
527 939
528 int events = 0; 940 unsigned char events = 0;
529 941
530 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 942 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
531 events |= w->events; 943 events |= (unsigned char)w->events;
532 944
533#if EV_SELECT_IS_WINSOCKET 945#if EV_SELECT_IS_WINSOCKET
534 if (events) 946 if (events)
535 { 947 {
536 unsigned long argp; 948 unsigned long arg;
537 anfd->handle = _get_osfhandle (fd); 949 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
538 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 950 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
539 } 951 }
540#endif 952#endif
541 953
954 {
955 unsigned char o_events = anfd->events;
956 unsigned char o_reify = anfd->reify;
957
542 anfd->reify = 0; 958 anfd->reify = 0;
543
544 backend_modify (EV_A_ fd, anfd->events, events);
545 anfd->events = events; 959 anfd->events = events;
960
961 if (o_events != events || o_reify & EV__IOFDSET)
962 backend_modify (EV_A_ fd, o_events, events);
963 }
546 } 964 }
547 965
548 fdchangecnt = 0; 966 fdchangecnt = 0;
549} 967}
550 968
551void inline_size 969/* something about the given fd changed */
970inline_size void
552fd_change (EV_P_ int fd) 971fd_change (EV_P_ int fd, int flags)
553{ 972{
554 if (expect_false (anfds [fd].reify)) 973 unsigned char reify = anfds [fd].reify;
555 return;
556
557 anfds [fd].reify = 1; 974 anfds [fd].reify |= flags;
558 975
976 if (expect_true (!reify))
977 {
559 ++fdchangecnt; 978 ++fdchangecnt;
560 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 979 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
561 fdchanges [fdchangecnt - 1] = fd; 980 fdchanges [fdchangecnt - 1] = fd;
981 }
562} 982}
563 983
564void inline_speed 984/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
985inline_speed void
565fd_kill (EV_P_ int fd) 986fd_kill (EV_P_ int fd)
566{ 987{
567 ev_io *w; 988 ev_io *w;
568 989
569 while ((w = (ev_io *)anfds [fd].head)) 990 while ((w = (ev_io *)anfds [fd].head))
… …
571 ev_io_stop (EV_A_ w); 992 ev_io_stop (EV_A_ w);
572 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 993 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
573 } 994 }
574} 995}
575 996
576int inline_size 997/* check whether the given fd is atcually valid, for error recovery */
998inline_size int
577fd_valid (int fd) 999fd_valid (int fd)
578{ 1000{
579#ifdef _WIN32 1001#ifdef _WIN32
580 return _get_osfhandle (fd) != -1; 1002 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
581#else 1003#else
582 return fcntl (fd, F_GETFD) != -1; 1004 return fcntl (fd, F_GETFD) != -1;
583#endif 1005#endif
584} 1006}
585 1007
… …
589{ 1011{
590 int fd; 1012 int fd;
591 1013
592 for (fd = 0; fd < anfdmax; ++fd) 1014 for (fd = 0; fd < anfdmax; ++fd)
593 if (anfds [fd].events) 1015 if (anfds [fd].events)
594 if (!fd_valid (fd) == -1 && errno == EBADF) 1016 if (!fd_valid (fd) && errno == EBADF)
595 fd_kill (EV_A_ fd); 1017 fd_kill (EV_A_ fd);
596} 1018}
597 1019
598/* called on ENOMEM in select/poll to kill some fds and retry */ 1020/* called on ENOMEM in select/poll to kill some fds and retry */
599static void noinline 1021static void noinline
… …
603 1025
604 for (fd = anfdmax; fd--; ) 1026 for (fd = anfdmax; fd--; )
605 if (anfds [fd].events) 1027 if (anfds [fd].events)
606 { 1028 {
607 fd_kill (EV_A_ fd); 1029 fd_kill (EV_A_ fd);
608 return; 1030 break;
609 } 1031 }
610} 1032}
611 1033
612/* usually called after fork if backend needs to re-arm all fds from scratch */ 1034/* usually called after fork if backend needs to re-arm all fds from scratch */
613static void noinline 1035static void noinline
… …
617 1039
618 for (fd = 0; fd < anfdmax; ++fd) 1040 for (fd = 0; fd < anfdmax; ++fd)
619 if (anfds [fd].events) 1041 if (anfds [fd].events)
620 { 1042 {
621 anfds [fd].events = 0; 1043 anfds [fd].events = 0;
622 fd_change (EV_A_ fd); 1044 anfds [fd].emask = 0;
1045 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
623 } 1046 }
624} 1047}
625 1048
626/*****************************************************************************/ 1049/*****************************************************************************/
627 1050
628void inline_speed 1051/*
629upheap (WT *heap, int k) 1052 * the heap functions want a real array index. array index 0 uis guaranteed to not
630{ 1053 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
631 WT w = heap [k]; 1054 * the branching factor of the d-tree.
1055 */
632 1056
633 while (k && heap [k >> 1]->at > w->at) 1057/*
634 { 1058 * at the moment we allow libev the luxury of two heaps,
635 heap [k] = heap [k >> 1]; 1059 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
636 ((W)heap [k])->active = k + 1; 1060 * which is more cache-efficient.
637 k >>= 1; 1061 * the difference is about 5% with 50000+ watchers.
638 } 1062 */
1063#if EV_USE_4HEAP
639 1064
640 heap [k] = w; 1065#define DHEAP 4
641 ((W)heap [k])->active = k + 1; 1066#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1067#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1068#define UPHEAP_DONE(p,k) ((p) == (k))
642 1069
643} 1070/* away from the root */
644 1071inline_speed void
645void inline_speed
646downheap (WT *heap, int N, int k) 1072downheap (ANHE *heap, int N, int k)
647{ 1073{
648 WT w = heap [k]; 1074 ANHE he = heap [k];
1075 ANHE *E = heap + N + HEAP0;
649 1076
650 while (k < (N >> 1)) 1077 for (;;)
651 { 1078 {
652 int j = k << 1; 1079 ev_tstamp minat;
1080 ANHE *minpos;
1081 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
653 1082
654 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 1083 /* find minimum child */
1084 if (expect_true (pos + DHEAP - 1 < E))
655 ++j; 1085 {
656 1086 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
657 if (w->at <= heap [j]->at) 1087 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1088 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1089 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1090 }
1091 else if (pos < E)
1092 {
1093 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1094 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1095 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1096 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1097 }
1098 else
658 break; 1099 break;
659 1100
1101 if (ANHE_at (he) <= minat)
1102 break;
1103
1104 heap [k] = *minpos;
1105 ev_active (ANHE_w (*minpos)) = k;
1106
1107 k = minpos - heap;
1108 }
1109
1110 heap [k] = he;
1111 ev_active (ANHE_w (he)) = k;
1112}
1113
1114#else /* 4HEAP */
1115
1116#define HEAP0 1
1117#define HPARENT(k) ((k) >> 1)
1118#define UPHEAP_DONE(p,k) (!(p))
1119
1120/* away from the root */
1121inline_speed void
1122downheap (ANHE *heap, int N, int k)
1123{
1124 ANHE he = heap [k];
1125
1126 for (;;)
1127 {
1128 int c = k << 1;
1129
1130 if (c >= N + HEAP0)
1131 break;
1132
1133 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1134 ? 1 : 0;
1135
1136 if (ANHE_at (he) <= ANHE_at (heap [c]))
1137 break;
1138
660 heap [k] = heap [j]; 1139 heap [k] = heap [c];
661 ((W)heap [k])->active = k + 1; 1140 ev_active (ANHE_w (heap [k])) = k;
1141
662 k = j; 1142 k = c;
663 } 1143 }
664 1144
665 heap [k] = w; 1145 heap [k] = he;
666 ((W)heap [k])->active = k + 1; 1146 ev_active (ANHE_w (he)) = k;
667} 1147}
1148#endif
668 1149
669void inline_size 1150/* towards the root */
1151inline_speed void
1152upheap (ANHE *heap, int k)
1153{
1154 ANHE he = heap [k];
1155
1156 for (;;)
1157 {
1158 int p = HPARENT (k);
1159
1160 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1161 break;
1162
1163 heap [k] = heap [p];
1164 ev_active (ANHE_w (heap [k])) = k;
1165 k = p;
1166 }
1167
1168 heap [k] = he;
1169 ev_active (ANHE_w (he)) = k;
1170}
1171
1172/* move an element suitably so it is in a correct place */
1173inline_size void
670adjustheap (WT *heap, int N, int k) 1174adjustheap (ANHE *heap, int N, int k)
671{ 1175{
1176 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
672 upheap (heap, k); 1177 upheap (heap, k);
1178 else
673 downheap (heap, N, k); 1179 downheap (heap, N, k);
1180}
1181
1182/* rebuild the heap: this function is used only once and executed rarely */
1183inline_size void
1184reheap (ANHE *heap, int N)
1185{
1186 int i;
1187
1188 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1189 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1190 for (i = 0; i < N; ++i)
1191 upheap (heap, i + HEAP0);
674} 1192}
675 1193
676/*****************************************************************************/ 1194/*****************************************************************************/
677 1195
1196/* associate signal watchers to a signal signal */
678typedef struct 1197typedef struct
679{ 1198{
1199 EV_ATOMIC_T pending;
1200#if EV_MULTIPLICITY
1201 EV_P;
1202#endif
680 WL head; 1203 WL head;
681 sig_atomic_t volatile gotsig;
682} ANSIG; 1204} ANSIG;
683 1205
684static ANSIG *signals; 1206static ANSIG signals [EV_NSIG - 1];
685static int signalmax;
686 1207
687static int sigpipe [2]; 1208/*****************************************************************************/
688static sig_atomic_t volatile gotsig;
689static ev_io sigev;
690 1209
691void inline_size 1210/* used to prepare libev internal fd's */
692signals_init (ANSIG *base, int count) 1211/* this is not fork-safe */
693{ 1212inline_speed void
694 while (count--)
695 {
696 base->head = 0;
697 base->gotsig = 0;
698
699 ++base;
700 }
701}
702
703static void
704sighandler (int signum)
705{
706#if _WIN32
707 signal (signum, sighandler);
708#endif
709
710 signals [signum - 1].gotsig = 1;
711
712 if (!gotsig)
713 {
714 int old_errno = errno;
715 gotsig = 1;
716 write (sigpipe [1], &signum, 1);
717 errno = old_errno;
718 }
719}
720
721void noinline
722ev_feed_signal_event (EV_P_ int signum)
723{
724 WL w;
725
726#if EV_MULTIPLICITY
727 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
728#endif
729
730 --signum;
731
732 if (signum < 0 || signum >= signalmax)
733 return;
734
735 signals [signum].gotsig = 0;
736
737 for (w = signals [signum].head; w; w = w->next)
738 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
739}
740
741static void
742sigcb (EV_P_ ev_io *iow, int revents)
743{
744 int signum;
745
746 read (sigpipe [0], &revents, 1);
747 gotsig = 0;
748
749 for (signum = signalmax; signum--; )
750 if (signals [signum].gotsig)
751 ev_feed_signal_event (EV_A_ signum + 1);
752}
753
754void inline_speed
755fd_intern (int fd) 1213fd_intern (int fd)
756{ 1214{
757#ifdef _WIN32 1215#ifdef _WIN32
758 int arg = 1; 1216 unsigned long arg = 1;
759 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1217 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
760#else 1218#else
761 fcntl (fd, F_SETFD, FD_CLOEXEC); 1219 fcntl (fd, F_SETFD, FD_CLOEXEC);
762 fcntl (fd, F_SETFL, O_NONBLOCK); 1220 fcntl (fd, F_SETFL, O_NONBLOCK);
763#endif 1221#endif
764} 1222}
765 1223
766static void noinline 1224static void noinline
767siginit (EV_P) 1225evpipe_init (EV_P)
768{ 1226{
1227 if (!ev_is_active (&pipe_w))
1228 {
1229#if EV_USE_EVENTFD
1230 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1231 if (evfd < 0 && errno == EINVAL)
1232 evfd = eventfd (0, 0);
1233
1234 if (evfd >= 0)
1235 {
1236 evpipe [0] = -1;
1237 fd_intern (evfd); /* doing it twice doesn't hurt */
1238 ev_io_set (&pipe_w, evfd, EV_READ);
1239 }
1240 else
1241#endif
1242 {
1243 while (pipe (evpipe))
1244 ev_syserr ("(libev) error creating signal/async pipe");
1245
769 fd_intern (sigpipe [0]); 1246 fd_intern (evpipe [0]);
770 fd_intern (sigpipe [1]); 1247 fd_intern (evpipe [1]);
1248 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1249 }
771 1250
772 ev_io_set (&sigev, sigpipe [0], EV_READ);
773 ev_io_start (EV_A_ &sigev); 1251 ev_io_start (EV_A_ &pipe_w);
774 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1252 ev_unref (EV_A); /* watcher should not keep loop alive */
1253 }
1254}
1255
1256inline_size void
1257evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1258{
1259 if (!*flag)
1260 {
1261 int old_errno = errno; /* save errno because write might clobber it */
1262
1263 *flag = 1;
1264
1265#if EV_USE_EVENTFD
1266 if (evfd >= 0)
1267 {
1268 uint64_t counter = 1;
1269 write (evfd, &counter, sizeof (uint64_t));
1270 }
1271 else
1272#endif
1273 write (evpipe [1], &old_errno, 1);
1274
1275 errno = old_errno;
1276 }
1277}
1278
1279/* called whenever the libev signal pipe */
1280/* got some events (signal, async) */
1281static void
1282pipecb (EV_P_ ev_io *iow, int revents)
1283{
1284 int i;
1285
1286#if EV_USE_EVENTFD
1287 if (evfd >= 0)
1288 {
1289 uint64_t counter;
1290 read (evfd, &counter, sizeof (uint64_t));
1291 }
1292 else
1293#endif
1294 {
1295 char dummy;
1296 read (evpipe [0], &dummy, 1);
1297 }
1298
1299 if (sig_pending)
1300 {
1301 sig_pending = 0;
1302
1303 for (i = EV_NSIG - 1; i--; )
1304 if (expect_false (signals [i].pending))
1305 ev_feed_signal_event (EV_A_ i + 1);
1306 }
1307
1308#if EV_ASYNC_ENABLE
1309 if (async_pending)
1310 {
1311 async_pending = 0;
1312
1313 for (i = asynccnt; i--; )
1314 if (asyncs [i]->sent)
1315 {
1316 asyncs [i]->sent = 0;
1317 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1318 }
1319 }
1320#endif
775} 1321}
776 1322
777/*****************************************************************************/ 1323/*****************************************************************************/
778 1324
1325static void
1326ev_sighandler (int signum)
1327{
1328#if EV_MULTIPLICITY
1329 EV_P = signals [signum - 1].loop;
1330#endif
1331
1332#ifdef _WIN32
1333 signal (signum, ev_sighandler);
1334#endif
1335
1336 signals [signum - 1].pending = 1;
1337 evpipe_write (EV_A_ &sig_pending);
1338}
1339
1340void noinline
1341ev_feed_signal_event (EV_P_ int signum)
1342{
1343 WL w;
1344
1345 if (expect_false (signum <= 0 || signum > EV_NSIG))
1346 return;
1347
1348 --signum;
1349
1350#if EV_MULTIPLICITY
1351 /* it is permissible to try to feed a signal to the wrong loop */
1352 /* or, likely more useful, feeding a signal nobody is waiting for */
1353
1354 if (expect_false (signals [signum].loop != EV_A))
1355 return;
1356#endif
1357
1358 signals [signum].pending = 0;
1359
1360 for (w = signals [signum].head; w; w = w->next)
1361 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1362}
1363
1364#if EV_USE_SIGNALFD
1365static void
1366sigfdcb (EV_P_ ev_io *iow, int revents)
1367{
1368 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1369
1370 for (;;)
1371 {
1372 ssize_t res = read (sigfd, si, sizeof (si));
1373
1374 /* not ISO-C, as res might be -1, but works with SuS */
1375 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1376 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1377
1378 if (res < (ssize_t)sizeof (si))
1379 break;
1380 }
1381}
1382#endif
1383
1384/*****************************************************************************/
1385
779static ev_child *childs [EV_PID_HASHSIZE]; 1386static WL childs [EV_PID_HASHSIZE];
780 1387
781#ifndef _WIN32 1388#ifndef _WIN32
782 1389
783static ev_signal childev; 1390static ev_signal childev;
784 1391
785void inline_speed 1392#ifndef WIFCONTINUED
1393# define WIFCONTINUED(status) 0
1394#endif
1395
1396/* handle a single child status event */
1397inline_speed void
786child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 1398child_reap (EV_P_ int chain, int pid, int status)
787{ 1399{
788 ev_child *w; 1400 ev_child *w;
1401 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
789 1402
790 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1403 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1404 {
791 if (w->pid == pid || !w->pid) 1405 if ((w->pid == pid || !w->pid)
1406 && (!traced || (w->flags & 1)))
792 { 1407 {
793 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 1408 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
794 w->rpid = pid; 1409 w->rpid = pid;
795 w->rstatus = status; 1410 w->rstatus = status;
796 ev_feed_event (EV_A_ (W)w, EV_CHILD); 1411 ev_feed_event (EV_A_ (W)w, EV_CHILD);
797 } 1412 }
1413 }
798} 1414}
799 1415
800#ifndef WCONTINUED 1416#ifndef WCONTINUED
801# define WCONTINUED 0 1417# define WCONTINUED 0
802#endif 1418#endif
803 1419
1420/* called on sigchld etc., calls waitpid */
804static void 1421static void
805childcb (EV_P_ ev_signal *sw, int revents) 1422childcb (EV_P_ ev_signal *sw, int revents)
806{ 1423{
807 int pid, status; 1424 int pid, status;
808 1425
… …
811 if (!WCONTINUED 1428 if (!WCONTINUED
812 || errno != EINVAL 1429 || errno != EINVAL
813 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 1430 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
814 return; 1431 return;
815 1432
816 /* make sure we are called again until all childs have been reaped */ 1433 /* make sure we are called again until all children have been reaped */
817 /* we need to do it this way so that the callback gets called before we continue */ 1434 /* we need to do it this way so that the callback gets called before we continue */
818 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1435 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
819 1436
820 child_reap (EV_A_ sw, pid, pid, status); 1437 child_reap (EV_A_ pid, pid, status);
821 if (EV_PID_HASHSIZE > 1) 1438 if (EV_PID_HASHSIZE > 1)
822 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1439 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
823} 1440}
824 1441
825#endif 1442#endif
826 1443
827/*****************************************************************************/ 1444/*****************************************************************************/
… …
889 /* kqueue is borked on everything but netbsd apparently */ 1506 /* kqueue is borked on everything but netbsd apparently */
890 /* it usually doesn't work correctly on anything but sockets and pipes */ 1507 /* it usually doesn't work correctly on anything but sockets and pipes */
891 flags &= ~EVBACKEND_KQUEUE; 1508 flags &= ~EVBACKEND_KQUEUE;
892#endif 1509#endif
893#ifdef __APPLE__ 1510#ifdef __APPLE__
894 // flags &= ~EVBACKEND_KQUEUE; for documentation 1511 /* only select works correctly on that "unix-certified" platform */
895 flags &= ~EVBACKEND_POLL; 1512 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1513 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
896#endif 1514#endif
897 1515
898 return flags; 1516 return flags;
899} 1517}
900 1518
901unsigned int 1519unsigned int
902ev_embeddable_backends (void) 1520ev_embeddable_backends (void)
903{ 1521{
904 return EVBACKEND_EPOLL 1522 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
905 | EVBACKEND_KQUEUE 1523
906 | EVBACKEND_PORT; 1524 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1525 /* please fix it and tell me how to detect the fix */
1526 flags &= ~EVBACKEND_EPOLL;
1527
1528 return flags;
907} 1529}
908 1530
909unsigned int 1531unsigned int
910ev_backend (EV_P) 1532ev_backend (EV_P)
911{ 1533{
912 return backend; 1534 return backend;
913} 1535}
914 1536
1537#if EV_MINIMAL < 2
915unsigned int 1538unsigned int
916ev_loop_count (EV_P) 1539ev_loop_count (EV_P)
917{ 1540{
918 return loop_count; 1541 return loop_count;
919} 1542}
920 1543
1544unsigned int
1545ev_loop_depth (EV_P)
1546{
1547 return loop_depth;
1548}
1549
1550void
1551ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1552{
1553 io_blocktime = interval;
1554}
1555
1556void
1557ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1558{
1559 timeout_blocktime = interval;
1560}
1561
1562void
1563ev_set_userdata (EV_P_ void *data)
1564{
1565 userdata = data;
1566}
1567
1568void *
1569ev_userdata (EV_P)
1570{
1571 return userdata;
1572}
1573
1574void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1575{
1576 invoke_cb = invoke_pending_cb;
1577}
1578
1579void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1580{
1581 release_cb = release;
1582 acquire_cb = acquire;
1583}
1584#endif
1585
1586/* initialise a loop structure, must be zero-initialised */
921static void noinline 1587static void noinline
922loop_init (EV_P_ unsigned int flags) 1588loop_init (EV_P_ unsigned int flags)
923{ 1589{
924 if (!backend) 1590 if (!backend)
925 { 1591 {
1592#if EV_USE_REALTIME
1593 if (!have_realtime)
1594 {
1595 struct timespec ts;
1596
1597 if (!clock_gettime (CLOCK_REALTIME, &ts))
1598 have_realtime = 1;
1599 }
1600#endif
1601
926#if EV_USE_MONOTONIC 1602#if EV_USE_MONOTONIC
1603 if (!have_monotonic)
927 { 1604 {
928 struct timespec ts; 1605 struct timespec ts;
1606
929 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1607 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
930 have_monotonic = 1; 1608 have_monotonic = 1;
931 } 1609 }
932#endif 1610#endif
933
934 ev_rt_now = ev_time ();
935 mn_now = get_clock ();
936 now_floor = mn_now;
937 rtmn_diff = ev_rt_now - mn_now;
938 1611
939 /* pid check not overridable via env */ 1612 /* pid check not overridable via env */
940#ifndef _WIN32 1613#ifndef _WIN32
941 if (flags & EVFLAG_FORKCHECK) 1614 if (flags & EVFLAG_FORKCHECK)
942 curpid = getpid (); 1615 curpid = getpid ();
… …
945 if (!(flags & EVFLAG_NOENV) 1618 if (!(flags & EVFLAG_NOENV)
946 && !enable_secure () 1619 && !enable_secure ()
947 && getenv ("LIBEV_FLAGS")) 1620 && getenv ("LIBEV_FLAGS"))
948 flags = atoi (getenv ("LIBEV_FLAGS")); 1621 flags = atoi (getenv ("LIBEV_FLAGS"));
949 1622
1623 ev_rt_now = ev_time ();
1624 mn_now = get_clock ();
1625 now_floor = mn_now;
1626 rtmn_diff = ev_rt_now - mn_now;
1627#if EV_MINIMAL < 2
1628 invoke_cb = ev_invoke_pending;
1629#endif
1630
1631 io_blocktime = 0.;
1632 timeout_blocktime = 0.;
1633 backend = 0;
1634 backend_fd = -1;
1635 sig_pending = 0;
1636#if EV_ASYNC_ENABLE
1637 async_pending = 0;
1638#endif
1639#if EV_USE_INOTIFY
1640 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1641#endif
1642#if EV_USE_SIGNALFD
1643 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1644#endif
1645
950 if (!(flags & 0x0000ffffUL)) 1646 if (!(flags & 0x0000ffffU))
951 flags |= ev_recommended_backends (); 1647 flags |= ev_recommended_backends ();
952
953 backend = 0;
954 backend_fd = -1;
955#if EV_USE_INOTIFY
956 fs_fd = -2;
957#endif
958 1648
959#if EV_USE_PORT 1649#if EV_USE_PORT
960 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1650 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
961#endif 1651#endif
962#if EV_USE_KQUEUE 1652#if EV_USE_KQUEUE
… …
970#endif 1660#endif
971#if EV_USE_SELECT 1661#if EV_USE_SELECT
972 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1662 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
973#endif 1663#endif
974 1664
1665 ev_prepare_init (&pending_w, pendingcb);
1666
975 ev_init (&sigev, sigcb); 1667 ev_init (&pipe_w, pipecb);
976 ev_set_priority (&sigev, EV_MAXPRI); 1668 ev_set_priority (&pipe_w, EV_MAXPRI);
977 } 1669 }
978} 1670}
979 1671
1672/* free up a loop structure */
980static void noinline 1673static void noinline
981loop_destroy (EV_P) 1674loop_destroy (EV_P)
982{ 1675{
983 int i; 1676 int i;
1677
1678 if (ev_is_active (&pipe_w))
1679 {
1680 /*ev_ref (EV_A);*/
1681 /*ev_io_stop (EV_A_ &pipe_w);*/
1682
1683#if EV_USE_EVENTFD
1684 if (evfd >= 0)
1685 close (evfd);
1686#endif
1687
1688 if (evpipe [0] >= 0)
1689 {
1690 EV_WIN32_CLOSE_FD (evpipe [0]);
1691 EV_WIN32_CLOSE_FD (evpipe [1]);
1692 }
1693 }
1694
1695#if EV_USE_SIGNALFD
1696 if (ev_is_active (&sigfd_w))
1697 close (sigfd);
1698#endif
984 1699
985#if EV_USE_INOTIFY 1700#if EV_USE_INOTIFY
986 if (fs_fd >= 0) 1701 if (fs_fd >= 0)
987 close (fs_fd); 1702 close (fs_fd);
988#endif 1703#endif
… …
1012#if EV_IDLE_ENABLE 1727#if EV_IDLE_ENABLE
1013 array_free (idle, [i]); 1728 array_free (idle, [i]);
1014#endif 1729#endif
1015 } 1730 }
1016 1731
1732 ev_free (anfds); anfds = 0; anfdmax = 0;
1733
1017 /* have to use the microsoft-never-gets-it-right macro */ 1734 /* have to use the microsoft-never-gets-it-right macro */
1735 array_free (rfeed, EMPTY);
1018 array_free (fdchange, EMPTY); 1736 array_free (fdchange, EMPTY);
1019 array_free (timer, EMPTY); 1737 array_free (timer, EMPTY);
1020#if EV_PERIODIC_ENABLE 1738#if EV_PERIODIC_ENABLE
1021 array_free (periodic, EMPTY); 1739 array_free (periodic, EMPTY);
1022#endif 1740#endif
1741#if EV_FORK_ENABLE
1742 array_free (fork, EMPTY);
1743#endif
1023 array_free (prepare, EMPTY); 1744 array_free (prepare, EMPTY);
1024 array_free (check, EMPTY); 1745 array_free (check, EMPTY);
1746#if EV_ASYNC_ENABLE
1747 array_free (async, EMPTY);
1748#endif
1025 1749
1026 backend = 0; 1750 backend = 0;
1027} 1751}
1028 1752
1753#if EV_USE_INOTIFY
1029void inline_size infy_fork (EV_P); 1754inline_size void infy_fork (EV_P);
1755#endif
1030 1756
1031void inline_size 1757inline_size void
1032loop_fork (EV_P) 1758loop_fork (EV_P)
1033{ 1759{
1034#if EV_USE_PORT 1760#if EV_USE_PORT
1035 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 1761 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1036#endif 1762#endif
… …
1042#endif 1768#endif
1043#if EV_USE_INOTIFY 1769#if EV_USE_INOTIFY
1044 infy_fork (EV_A); 1770 infy_fork (EV_A);
1045#endif 1771#endif
1046 1772
1047 if (ev_is_active (&sigev)) 1773 if (ev_is_active (&pipe_w))
1048 { 1774 {
1049 /* default loop */ 1775 /* this "locks" the handlers against writing to the pipe */
1776 /* while we modify the fd vars */
1777 sig_pending = 1;
1778#if EV_ASYNC_ENABLE
1779 async_pending = 1;
1780#endif
1050 1781
1051 ev_ref (EV_A); 1782 ev_ref (EV_A);
1052 ev_io_stop (EV_A_ &sigev); 1783 ev_io_stop (EV_A_ &pipe_w);
1053 close (sigpipe [0]);
1054 close (sigpipe [1]);
1055 1784
1056 while (pipe (sigpipe)) 1785#if EV_USE_EVENTFD
1057 syserr ("(libev) error creating pipe"); 1786 if (evfd >= 0)
1787 close (evfd);
1788#endif
1058 1789
1790 if (evpipe [0] >= 0)
1791 {
1792 EV_WIN32_CLOSE_FD (evpipe [0]);
1793 EV_WIN32_CLOSE_FD (evpipe [1]);
1794 }
1795
1059 siginit (EV_A); 1796 evpipe_init (EV_A);
1797 /* now iterate over everything, in case we missed something */
1798 pipecb (EV_A_ &pipe_w, EV_READ);
1060 } 1799 }
1061 1800
1062 postfork = 0; 1801 postfork = 0;
1063} 1802}
1064 1803
1065#if EV_MULTIPLICITY 1804#if EV_MULTIPLICITY
1805
1066struct ev_loop * 1806struct ev_loop *
1067ev_loop_new (unsigned int flags) 1807ev_loop_new (unsigned int flags)
1068{ 1808{
1069 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 1809 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1070 1810
1071 memset (loop, 0, sizeof (struct ev_loop)); 1811 memset (EV_A, 0, sizeof (struct ev_loop));
1072
1073 loop_init (EV_A_ flags); 1812 loop_init (EV_A_ flags);
1074 1813
1075 if (ev_backend (EV_A)) 1814 if (ev_backend (EV_A))
1076 return loop; 1815 return EV_A;
1077 1816
1078 return 0; 1817 return 0;
1079} 1818}
1080 1819
1081void 1820void
… …
1086} 1825}
1087 1826
1088void 1827void
1089ev_loop_fork (EV_P) 1828ev_loop_fork (EV_P)
1090{ 1829{
1091 postfork = 1; 1830 postfork = 1; /* must be in line with ev_default_fork */
1092} 1831}
1832#endif /* multiplicity */
1093 1833
1834#if EV_VERIFY
1835static void noinline
1836verify_watcher (EV_P_ W w)
1837{
1838 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1839
1840 if (w->pending)
1841 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1842}
1843
1844static void noinline
1845verify_heap (EV_P_ ANHE *heap, int N)
1846{
1847 int i;
1848
1849 for (i = HEAP0; i < N + HEAP0; ++i)
1850 {
1851 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1852 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1853 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1854
1855 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1856 }
1857}
1858
1859static void noinline
1860array_verify (EV_P_ W *ws, int cnt)
1861{
1862 while (cnt--)
1863 {
1864 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1865 verify_watcher (EV_A_ ws [cnt]);
1866 }
1867}
1868#endif
1869
1870#if EV_MINIMAL < 2
1871void
1872ev_loop_verify (EV_P)
1873{
1874#if EV_VERIFY
1875 int i;
1876 WL w;
1877
1878 assert (activecnt >= -1);
1879
1880 assert (fdchangemax >= fdchangecnt);
1881 for (i = 0; i < fdchangecnt; ++i)
1882 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1883
1884 assert (anfdmax >= 0);
1885 for (i = 0; i < anfdmax; ++i)
1886 for (w = anfds [i].head; w; w = w->next)
1887 {
1888 verify_watcher (EV_A_ (W)w);
1889 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1890 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1891 }
1892
1893 assert (timermax >= timercnt);
1894 verify_heap (EV_A_ timers, timercnt);
1895
1896#if EV_PERIODIC_ENABLE
1897 assert (periodicmax >= periodiccnt);
1898 verify_heap (EV_A_ periodics, periodiccnt);
1899#endif
1900
1901 for (i = NUMPRI; i--; )
1902 {
1903 assert (pendingmax [i] >= pendingcnt [i]);
1904#if EV_IDLE_ENABLE
1905 assert (idleall >= 0);
1906 assert (idlemax [i] >= idlecnt [i]);
1907 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1908#endif
1909 }
1910
1911#if EV_FORK_ENABLE
1912 assert (forkmax >= forkcnt);
1913 array_verify (EV_A_ (W *)forks, forkcnt);
1914#endif
1915
1916#if EV_ASYNC_ENABLE
1917 assert (asyncmax >= asynccnt);
1918 array_verify (EV_A_ (W *)asyncs, asynccnt);
1919#endif
1920
1921 assert (preparemax >= preparecnt);
1922 array_verify (EV_A_ (W *)prepares, preparecnt);
1923
1924 assert (checkmax >= checkcnt);
1925 array_verify (EV_A_ (W *)checks, checkcnt);
1926
1927# if 0
1928 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1929 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1930# endif
1931#endif
1932}
1094#endif 1933#endif
1095 1934
1096#if EV_MULTIPLICITY 1935#if EV_MULTIPLICITY
1097struct ev_loop * 1936struct ev_loop *
1098ev_default_loop_init (unsigned int flags) 1937ev_default_loop_init (unsigned int flags)
1099#else 1938#else
1100int 1939int
1101ev_default_loop (unsigned int flags) 1940ev_default_loop (unsigned int flags)
1102#endif 1941#endif
1103{ 1942{
1104 if (sigpipe [0] == sigpipe [1])
1105 if (pipe (sigpipe))
1106 return 0;
1107
1108 if (!ev_default_loop_ptr) 1943 if (!ev_default_loop_ptr)
1109 { 1944 {
1110#if EV_MULTIPLICITY 1945#if EV_MULTIPLICITY
1111 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1946 EV_P = ev_default_loop_ptr = &default_loop_struct;
1112#else 1947#else
1113 ev_default_loop_ptr = 1; 1948 ev_default_loop_ptr = 1;
1114#endif 1949#endif
1115 1950
1116 loop_init (EV_A_ flags); 1951 loop_init (EV_A_ flags);
1117 1952
1118 if (ev_backend (EV_A)) 1953 if (ev_backend (EV_A))
1119 { 1954 {
1120 siginit (EV_A);
1121
1122#ifndef _WIN32 1955#ifndef _WIN32
1123 ev_signal_init (&childev, childcb, SIGCHLD); 1956 ev_signal_init (&childev, childcb, SIGCHLD);
1124 ev_set_priority (&childev, EV_MAXPRI); 1957 ev_set_priority (&childev, EV_MAXPRI);
1125 ev_signal_start (EV_A_ &childev); 1958 ev_signal_start (EV_A_ &childev);
1126 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1959 ev_unref (EV_A); /* child watcher should not keep loop alive */
… …
1135 1968
1136void 1969void
1137ev_default_destroy (void) 1970ev_default_destroy (void)
1138{ 1971{
1139#if EV_MULTIPLICITY 1972#if EV_MULTIPLICITY
1140 struct ev_loop *loop = ev_default_loop_ptr; 1973 EV_P = ev_default_loop_ptr;
1141#endif 1974#endif
1975
1976 ev_default_loop_ptr = 0;
1142 1977
1143#ifndef _WIN32 1978#ifndef _WIN32
1144 ev_ref (EV_A); /* child watcher */ 1979 ev_ref (EV_A); /* child watcher */
1145 ev_signal_stop (EV_A_ &childev); 1980 ev_signal_stop (EV_A_ &childev);
1146#endif 1981#endif
1147 1982
1148 ev_ref (EV_A); /* signal watcher */
1149 ev_io_stop (EV_A_ &sigev);
1150
1151 close (sigpipe [0]); sigpipe [0] = 0;
1152 close (sigpipe [1]); sigpipe [1] = 0;
1153
1154 loop_destroy (EV_A); 1983 loop_destroy (EV_A);
1155} 1984}
1156 1985
1157void 1986void
1158ev_default_fork (void) 1987ev_default_fork (void)
1159{ 1988{
1160#if EV_MULTIPLICITY 1989#if EV_MULTIPLICITY
1161 struct ev_loop *loop = ev_default_loop_ptr; 1990 EV_P = ev_default_loop_ptr;
1162#endif 1991#endif
1163 1992
1164 if (backend) 1993 postfork = 1; /* must be in line with ev_loop_fork */
1165 postfork = 1;
1166} 1994}
1167 1995
1168/*****************************************************************************/ 1996/*****************************************************************************/
1169 1997
1170void 1998void
1171ev_invoke (EV_P_ void *w, int revents) 1999ev_invoke (EV_P_ void *w, int revents)
1172{ 2000{
1173 EV_CB_INVOKE ((W)w, revents); 2001 EV_CB_INVOKE ((W)w, revents);
1174} 2002}
1175 2003
1176void inline_speed 2004unsigned int
1177call_pending (EV_P) 2005ev_pending_count (EV_P)
2006{
2007 int pri;
2008 unsigned int count = 0;
2009
2010 for (pri = NUMPRI; pri--; )
2011 count += pendingcnt [pri];
2012
2013 return count;
2014}
2015
2016void noinline
2017ev_invoke_pending (EV_P)
1178{ 2018{
1179 int pri; 2019 int pri;
1180 2020
1181 for (pri = NUMPRI; pri--; ) 2021 for (pri = NUMPRI; pri--; )
1182 while (pendingcnt [pri]) 2022 while (pendingcnt [pri])
1183 { 2023 {
1184 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2024 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1185 2025
1186 if (expect_true (p->w))
1187 {
1188 /*assert (("non-pending watcher on pending list", p->w->pending));*/ 2026 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2027 /* ^ this is no longer true, as pending_w could be here */
1189 2028
1190 p->w->pending = 0; 2029 p->w->pending = 0;
1191 EV_CB_INVOKE (p->w, p->events); 2030 EV_CB_INVOKE (p->w, p->events);
1192 } 2031 EV_FREQUENT_CHECK;
1193 } 2032 }
1194} 2033}
1195 2034
1196void inline_size
1197timers_reify (EV_P)
1198{
1199 while (timercnt && ((WT)timers [0])->at <= mn_now)
1200 {
1201 ev_timer *w = timers [0];
1202
1203 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1204
1205 /* first reschedule or stop timer */
1206 if (w->repeat)
1207 {
1208 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1209
1210 ((WT)w)->at += w->repeat;
1211 if (((WT)w)->at < mn_now)
1212 ((WT)w)->at = mn_now;
1213
1214 downheap ((WT *)timers, timercnt, 0);
1215 }
1216 else
1217 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1218
1219 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1220 }
1221}
1222
1223#if EV_PERIODIC_ENABLE
1224void inline_size
1225periodics_reify (EV_P)
1226{
1227 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1228 {
1229 ev_periodic *w = periodics [0];
1230
1231 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1232
1233 /* first reschedule or stop timer */
1234 if (w->reschedule_cb)
1235 {
1236 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
1237 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1238 downheap ((WT *)periodics, periodiccnt, 0);
1239 }
1240 else if (w->interval)
1241 {
1242 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1243 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1244 downheap ((WT *)periodics, periodiccnt, 0);
1245 }
1246 else
1247 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1248
1249 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1250 }
1251}
1252
1253static void noinline
1254periodics_reschedule (EV_P)
1255{
1256 int i;
1257
1258 /* adjust periodics after time jump */
1259 for (i = 0; i < periodiccnt; ++i)
1260 {
1261 ev_periodic *w = periodics [i];
1262
1263 if (w->reschedule_cb)
1264 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1265 else if (w->interval)
1266 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1267 }
1268
1269 /* now rebuild the heap */
1270 for (i = periodiccnt >> 1; i--; )
1271 downheap ((WT *)periodics, periodiccnt, i);
1272}
1273#endif
1274
1275#if EV_IDLE_ENABLE 2035#if EV_IDLE_ENABLE
1276void inline_size 2036/* make idle watchers pending. this handles the "call-idle */
2037/* only when higher priorities are idle" logic */
2038inline_size void
1277idle_reify (EV_P) 2039idle_reify (EV_P)
1278{ 2040{
1279 if (expect_false (idleall)) 2041 if (expect_false (idleall))
1280 { 2042 {
1281 int pri; 2043 int pri;
… …
1293 } 2055 }
1294 } 2056 }
1295} 2057}
1296#endif 2058#endif
1297 2059
1298int inline_size 2060/* make timers pending */
1299time_update_monotonic (EV_P) 2061inline_size void
2062timers_reify (EV_P)
1300{ 2063{
2064 EV_FREQUENT_CHECK;
2065
2066 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2067 {
2068 do
2069 {
2070 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2071
2072 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2073
2074 /* first reschedule or stop timer */
2075 if (w->repeat)
2076 {
2077 ev_at (w) += w->repeat;
2078 if (ev_at (w) < mn_now)
2079 ev_at (w) = mn_now;
2080
2081 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2082
2083 ANHE_at_cache (timers [HEAP0]);
2084 downheap (timers, timercnt, HEAP0);
2085 }
2086 else
2087 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2088
2089 EV_FREQUENT_CHECK;
2090 feed_reverse (EV_A_ (W)w);
2091 }
2092 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2093
2094 feed_reverse_done (EV_A_ EV_TIMEOUT);
2095 }
2096}
2097
2098#if EV_PERIODIC_ENABLE
2099/* make periodics pending */
2100inline_size void
2101periodics_reify (EV_P)
2102{
2103 EV_FREQUENT_CHECK;
2104
2105 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2106 {
2107 int feed_count = 0;
2108
2109 do
2110 {
2111 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2112
2113 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2114
2115 /* first reschedule or stop timer */
2116 if (w->reschedule_cb)
2117 {
2118 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2119
2120 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2121
2122 ANHE_at_cache (periodics [HEAP0]);
2123 downheap (periodics, periodiccnt, HEAP0);
2124 }
2125 else if (w->interval)
2126 {
2127 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2128 /* if next trigger time is not sufficiently in the future, put it there */
2129 /* this might happen because of floating point inexactness */
2130 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2131 {
2132 ev_at (w) += w->interval;
2133
2134 /* if interval is unreasonably low we might still have a time in the past */
2135 /* so correct this. this will make the periodic very inexact, but the user */
2136 /* has effectively asked to get triggered more often than possible */
2137 if (ev_at (w) < ev_rt_now)
2138 ev_at (w) = ev_rt_now;
2139 }
2140
2141 ANHE_at_cache (periodics [HEAP0]);
2142 downheap (periodics, periodiccnt, HEAP0);
2143 }
2144 else
2145 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2146
2147 EV_FREQUENT_CHECK;
2148 feed_reverse (EV_A_ (W)w);
2149 }
2150 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2151
2152 feed_reverse_done (EV_A_ EV_PERIODIC);
2153 }
2154}
2155
2156/* simply recalculate all periodics */
2157/* TODO: maybe ensure that at leats one event happens when jumping forward? */
2158static void noinline
2159periodics_reschedule (EV_P)
2160{
2161 int i;
2162
2163 /* adjust periodics after time jump */
2164 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2165 {
2166 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2167
2168 if (w->reschedule_cb)
2169 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2170 else if (w->interval)
2171 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2172
2173 ANHE_at_cache (periodics [i]);
2174 }
2175
2176 reheap (periodics, periodiccnt);
2177}
2178#endif
2179
2180/* adjust all timers by a given offset */
2181static void noinline
2182timers_reschedule (EV_P_ ev_tstamp adjust)
2183{
2184 int i;
2185
2186 for (i = 0; i < timercnt; ++i)
2187 {
2188 ANHE *he = timers + i + HEAP0;
2189 ANHE_w (*he)->at += adjust;
2190 ANHE_at_cache (*he);
2191 }
2192}
2193
2194/* fetch new monotonic and realtime times from the kernel */
2195/* also detect if there was a timejump, and act accordingly */
2196inline_speed void
2197time_update (EV_P_ ev_tstamp max_block)
2198{
2199#if EV_USE_MONOTONIC
2200 if (expect_true (have_monotonic))
2201 {
2202 int i;
2203 ev_tstamp odiff = rtmn_diff;
2204
1301 mn_now = get_clock (); 2205 mn_now = get_clock ();
1302 2206
2207 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2208 /* interpolate in the meantime */
1303 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 2209 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1304 { 2210 {
1305 ev_rt_now = rtmn_diff + mn_now; 2211 ev_rt_now = rtmn_diff + mn_now;
1306 return 0; 2212 return;
1307 } 2213 }
1308 else 2214
1309 {
1310 now_floor = mn_now; 2215 now_floor = mn_now;
1311 ev_rt_now = ev_time (); 2216 ev_rt_now = ev_time ();
1312 return 1;
1313 }
1314}
1315 2217
1316void inline_size 2218 /* loop a few times, before making important decisions.
1317time_update (EV_P) 2219 * on the choice of "4": one iteration isn't enough,
1318{ 2220 * in case we get preempted during the calls to
1319 int i; 2221 * ev_time and get_clock. a second call is almost guaranteed
1320 2222 * to succeed in that case, though. and looping a few more times
1321#if EV_USE_MONOTONIC 2223 * doesn't hurt either as we only do this on time-jumps or
1322 if (expect_true (have_monotonic)) 2224 * in the unlikely event of having been preempted here.
1323 { 2225 */
1324 if (time_update_monotonic (EV_A)) 2226 for (i = 4; --i; )
1325 { 2227 {
1326 ev_tstamp odiff = rtmn_diff;
1327
1328 /* loop a few times, before making important decisions.
1329 * on the choice of "4": one iteration isn't enough,
1330 * in case we get preempted during the calls to
1331 * ev_time and get_clock. a second call is almost guaranteed
1332 * to succeed in that case, though. and looping a few more times
1333 * doesn't hurt either as we only do this on time-jumps or
1334 * in the unlikely event of having been preempted here.
1335 */
1336 for (i = 4; --i; )
1337 {
1338 rtmn_diff = ev_rt_now - mn_now; 2228 rtmn_diff = ev_rt_now - mn_now;
1339 2229
1340 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2230 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1341 return; /* all is well */ 2231 return; /* all is well */
1342 2232
1343 ev_rt_now = ev_time (); 2233 ev_rt_now = ev_time ();
1344 mn_now = get_clock (); 2234 mn_now = get_clock ();
1345 now_floor = mn_now; 2235 now_floor = mn_now;
1346 } 2236 }
1347 2237
2238 /* no timer adjustment, as the monotonic clock doesn't jump */
2239 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1348# if EV_PERIODIC_ENABLE 2240# if EV_PERIODIC_ENABLE
1349 periodics_reschedule (EV_A); 2241 periodics_reschedule (EV_A);
1350# endif 2242# endif
1351 /* no timer adjustment, as the monotonic clock doesn't jump */
1352 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1353 }
1354 } 2243 }
1355 else 2244 else
1356#endif 2245#endif
1357 { 2246 {
1358 ev_rt_now = ev_time (); 2247 ev_rt_now = ev_time ();
1359 2248
1360 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 2249 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1361 { 2250 {
2251 /* adjust timers. this is easy, as the offset is the same for all of them */
2252 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1362#if EV_PERIODIC_ENABLE 2253#if EV_PERIODIC_ENABLE
1363 periodics_reschedule (EV_A); 2254 periodics_reschedule (EV_A);
1364#endif 2255#endif
1365
1366 /* adjust timers. this is easy, as the offset is the same for all of them */
1367 for (i = 0; i < timercnt; ++i)
1368 ((WT)timers [i])->at += ev_rt_now - mn_now;
1369 } 2256 }
1370 2257
1371 mn_now = ev_rt_now; 2258 mn_now = ev_rt_now;
1372 } 2259 }
1373} 2260}
1374 2261
1375void 2262void
1376ev_ref (EV_P)
1377{
1378 ++activecnt;
1379}
1380
1381void
1382ev_unref (EV_P)
1383{
1384 --activecnt;
1385}
1386
1387static int loop_done;
1388
1389void
1390ev_loop (EV_P_ int flags) 2263ev_loop (EV_P_ int flags)
1391{ 2264{
1392 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2265#if EV_MINIMAL < 2
1393 ? EVUNLOOP_ONE 2266 ++loop_depth;
1394 : EVUNLOOP_CANCEL; 2267#endif
1395 2268
2269 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2270
2271 loop_done = EVUNLOOP_CANCEL;
2272
1396 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 2273 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1397 2274
1398 do 2275 do
1399 { 2276 {
2277#if EV_VERIFY >= 2
2278 ev_loop_verify (EV_A);
2279#endif
2280
1400#ifndef _WIN32 2281#ifndef _WIN32
1401 if (expect_false (curpid)) /* penalise the forking check even more */ 2282 if (expect_false (curpid)) /* penalise the forking check even more */
1402 if (expect_false (getpid () != curpid)) 2283 if (expect_false (getpid () != curpid))
1403 { 2284 {
1404 curpid = getpid (); 2285 curpid = getpid ();
… …
1410 /* we might have forked, so queue fork handlers */ 2291 /* we might have forked, so queue fork handlers */
1411 if (expect_false (postfork)) 2292 if (expect_false (postfork))
1412 if (forkcnt) 2293 if (forkcnt)
1413 { 2294 {
1414 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 2295 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1415 call_pending (EV_A); 2296 EV_INVOKE_PENDING;
1416 } 2297 }
1417#endif 2298#endif
1418 2299
1419 /* queue prepare watchers (and execute them) */ 2300 /* queue prepare watchers (and execute them) */
1420 if (expect_false (preparecnt)) 2301 if (expect_false (preparecnt))
1421 { 2302 {
1422 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2303 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1423 call_pending (EV_A); 2304 EV_INVOKE_PENDING;
1424 } 2305 }
1425 2306
1426 if (expect_false (!activecnt)) 2307 if (expect_false (loop_done))
1427 break; 2308 break;
1428 2309
1429 /* we might have forked, so reify kernel state if necessary */ 2310 /* we might have forked, so reify kernel state if necessary */
1430 if (expect_false (postfork)) 2311 if (expect_false (postfork))
1431 loop_fork (EV_A); 2312 loop_fork (EV_A);
… …
1433 /* update fd-related kernel structures */ 2314 /* update fd-related kernel structures */
1434 fd_reify (EV_A); 2315 fd_reify (EV_A);
1435 2316
1436 /* calculate blocking time */ 2317 /* calculate blocking time */
1437 { 2318 {
1438 ev_tstamp block; 2319 ev_tstamp waittime = 0.;
2320 ev_tstamp sleeptime = 0.;
1439 2321
1440 if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt)) 2322 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1441 block = 0.; /* do not block at all */
1442 else
1443 { 2323 {
2324 /* remember old timestamp for io_blocktime calculation */
2325 ev_tstamp prev_mn_now = mn_now;
2326
1444 /* update time to cancel out callback processing overhead */ 2327 /* update time to cancel out callback processing overhead */
1445#if EV_USE_MONOTONIC
1446 if (expect_true (have_monotonic))
1447 time_update_monotonic (EV_A); 2328 time_update (EV_A_ 1e100);
1448 else
1449#endif
1450 {
1451 ev_rt_now = ev_time ();
1452 mn_now = ev_rt_now;
1453 }
1454 2329
1455 block = MAX_BLOCKTIME; 2330 waittime = MAX_BLOCKTIME;
1456 2331
1457 if (timercnt) 2332 if (timercnt)
1458 { 2333 {
1459 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 2334 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1460 if (block > to) block = to; 2335 if (waittime > to) waittime = to;
1461 } 2336 }
1462 2337
1463#if EV_PERIODIC_ENABLE 2338#if EV_PERIODIC_ENABLE
1464 if (periodiccnt) 2339 if (periodiccnt)
1465 { 2340 {
1466 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 2341 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1467 if (block > to) block = to; 2342 if (waittime > to) waittime = to;
1468 } 2343 }
1469#endif 2344#endif
1470 2345
2346 /* don't let timeouts decrease the waittime below timeout_blocktime */
2347 if (expect_false (waittime < timeout_blocktime))
2348 waittime = timeout_blocktime;
2349
2350 /* extra check because io_blocktime is commonly 0 */
1471 if (expect_false (block < 0.)) block = 0.; 2351 if (expect_false (io_blocktime))
2352 {
2353 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2354
2355 if (sleeptime > waittime - backend_fudge)
2356 sleeptime = waittime - backend_fudge;
2357
2358 if (expect_true (sleeptime > 0.))
2359 {
2360 ev_sleep (sleeptime);
2361 waittime -= sleeptime;
2362 }
2363 }
1472 } 2364 }
1473 2365
2366#if EV_MINIMAL < 2
1474 ++loop_count; 2367 ++loop_count;
2368#endif
2369 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
1475 backend_poll (EV_A_ block); 2370 backend_poll (EV_A_ waittime);
2371 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2372
2373 /* update ev_rt_now, do magic */
2374 time_update (EV_A_ waittime + sleeptime);
1476 } 2375 }
1477
1478 /* update ev_rt_now, do magic */
1479 time_update (EV_A);
1480 2376
1481 /* queue pending timers and reschedule them */ 2377 /* queue pending timers and reschedule them */
1482 timers_reify (EV_A); /* relative timers called last */ 2378 timers_reify (EV_A); /* relative timers called last */
1483#if EV_PERIODIC_ENABLE 2379#if EV_PERIODIC_ENABLE
1484 periodics_reify (EV_A); /* absolute timers called first */ 2380 periodics_reify (EV_A); /* absolute timers called first */
… …
1491 2387
1492 /* queue check watchers, to be executed first */ 2388 /* queue check watchers, to be executed first */
1493 if (expect_false (checkcnt)) 2389 if (expect_false (checkcnt))
1494 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2390 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1495 2391
1496 call_pending (EV_A); 2392 EV_INVOKE_PENDING;
1497
1498 } 2393 }
1499 while (expect_true (activecnt && !loop_done)); 2394 while (expect_true (
2395 activecnt
2396 && !loop_done
2397 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2398 ));
1500 2399
1501 if (loop_done == EVUNLOOP_ONE) 2400 if (loop_done == EVUNLOOP_ONE)
1502 loop_done = EVUNLOOP_CANCEL; 2401 loop_done = EVUNLOOP_CANCEL;
2402
2403#if EV_MINIMAL < 2
2404 --loop_depth;
2405#endif
1503} 2406}
1504 2407
1505void 2408void
1506ev_unloop (EV_P_ int how) 2409ev_unloop (EV_P_ int how)
1507{ 2410{
1508 loop_done = how; 2411 loop_done = how;
1509} 2412}
1510 2413
2414void
2415ev_ref (EV_P)
2416{
2417 ++activecnt;
2418}
2419
2420void
2421ev_unref (EV_P)
2422{
2423 --activecnt;
2424}
2425
2426void
2427ev_now_update (EV_P)
2428{
2429 time_update (EV_A_ 1e100);
2430}
2431
2432void
2433ev_suspend (EV_P)
2434{
2435 ev_now_update (EV_A);
2436}
2437
2438void
2439ev_resume (EV_P)
2440{
2441 ev_tstamp mn_prev = mn_now;
2442
2443 ev_now_update (EV_A);
2444 timers_reschedule (EV_A_ mn_now - mn_prev);
2445#if EV_PERIODIC_ENABLE
2446 /* TODO: really do this? */
2447 periodics_reschedule (EV_A);
2448#endif
2449}
2450
1511/*****************************************************************************/ 2451/*****************************************************************************/
2452/* singly-linked list management, used when the expected list length is short */
1512 2453
1513void inline_size 2454inline_size void
1514wlist_add (WL *head, WL elem) 2455wlist_add (WL *head, WL elem)
1515{ 2456{
1516 elem->next = *head; 2457 elem->next = *head;
1517 *head = elem; 2458 *head = elem;
1518} 2459}
1519 2460
1520void inline_size 2461inline_size void
1521wlist_del (WL *head, WL elem) 2462wlist_del (WL *head, WL elem)
1522{ 2463{
1523 while (*head) 2464 while (*head)
1524 { 2465 {
1525 if (*head == elem) 2466 if (expect_true (*head == elem))
1526 { 2467 {
1527 *head = elem->next; 2468 *head = elem->next;
1528 return; 2469 break;
1529 } 2470 }
1530 2471
1531 head = &(*head)->next; 2472 head = &(*head)->next;
1532 } 2473 }
1533} 2474}
1534 2475
1535void inline_speed 2476/* internal, faster, version of ev_clear_pending */
2477inline_speed void
1536clear_pending (EV_P_ W w) 2478clear_pending (EV_P_ W w)
1537{ 2479{
1538 if (w->pending) 2480 if (w->pending)
1539 { 2481 {
1540 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2482 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1541 w->pending = 0; 2483 w->pending = 0;
1542 } 2484 }
1543} 2485}
1544 2486
1545int 2487int
… …
1549 int pending = w_->pending; 2491 int pending = w_->pending;
1550 2492
1551 if (expect_true (pending)) 2493 if (expect_true (pending))
1552 { 2494 {
1553 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 2495 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2496 p->w = (W)&pending_w;
1554 w_->pending = 0; 2497 w_->pending = 0;
1555 p->w = 0;
1556 return p->events; 2498 return p->events;
1557 } 2499 }
1558 else 2500 else
1559 return 0; 2501 return 0;
1560} 2502}
1561 2503
1562void inline_size 2504inline_size void
1563pri_adjust (EV_P_ W w) 2505pri_adjust (EV_P_ W w)
1564{ 2506{
1565 int pri = w->priority; 2507 int pri = ev_priority (w);
1566 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 2508 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1567 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 2509 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1568 w->priority = pri; 2510 ev_set_priority (w, pri);
1569} 2511}
1570 2512
1571void inline_speed 2513inline_speed void
1572ev_start (EV_P_ W w, int active) 2514ev_start (EV_P_ W w, int active)
1573{ 2515{
1574 pri_adjust (EV_A_ w); 2516 pri_adjust (EV_A_ w);
1575 w->active = active; 2517 w->active = active;
1576 ev_ref (EV_A); 2518 ev_ref (EV_A);
1577} 2519}
1578 2520
1579void inline_size 2521inline_size void
1580ev_stop (EV_P_ W w) 2522ev_stop (EV_P_ W w)
1581{ 2523{
1582 ev_unref (EV_A); 2524 ev_unref (EV_A);
1583 w->active = 0; 2525 w->active = 0;
1584} 2526}
… …
1591 int fd = w->fd; 2533 int fd = w->fd;
1592 2534
1593 if (expect_false (ev_is_active (w))) 2535 if (expect_false (ev_is_active (w)))
1594 return; 2536 return;
1595 2537
1596 assert (("ev_io_start called with negative fd", fd >= 0)); 2538 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2539 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2540
2541 EV_FREQUENT_CHECK;
1597 2542
1598 ev_start (EV_A_ (W)w, 1); 2543 ev_start (EV_A_ (W)w, 1);
1599 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2544 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1600 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2545 wlist_add (&anfds[fd].head, (WL)w);
1601 2546
1602 fd_change (EV_A_ fd); 2547 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2548 w->events &= ~EV__IOFDSET;
2549
2550 EV_FREQUENT_CHECK;
1603} 2551}
1604 2552
1605void noinline 2553void noinline
1606ev_io_stop (EV_P_ ev_io *w) 2554ev_io_stop (EV_P_ ev_io *w)
1607{ 2555{
1608 clear_pending (EV_A_ (W)w); 2556 clear_pending (EV_A_ (W)w);
1609 if (expect_false (!ev_is_active (w))) 2557 if (expect_false (!ev_is_active (w)))
1610 return; 2558 return;
1611 2559
1612 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2560 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1613 2561
2562 EV_FREQUENT_CHECK;
2563
1614 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2564 wlist_del (&anfds[w->fd].head, (WL)w);
1615 ev_stop (EV_A_ (W)w); 2565 ev_stop (EV_A_ (W)w);
1616 2566
1617 fd_change (EV_A_ w->fd); 2567 fd_change (EV_A_ w->fd, 1);
2568
2569 EV_FREQUENT_CHECK;
1618} 2570}
1619 2571
1620void noinline 2572void noinline
1621ev_timer_start (EV_P_ ev_timer *w) 2573ev_timer_start (EV_P_ ev_timer *w)
1622{ 2574{
1623 if (expect_false (ev_is_active (w))) 2575 if (expect_false (ev_is_active (w)))
1624 return; 2576 return;
1625 2577
1626 ((WT)w)->at += mn_now; 2578 ev_at (w) += mn_now;
1627 2579
1628 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2580 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1629 2581
2582 EV_FREQUENT_CHECK;
2583
2584 ++timercnt;
1630 ev_start (EV_A_ (W)w, ++timercnt); 2585 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1631 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 2586 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1632 timers [timercnt - 1] = w; 2587 ANHE_w (timers [ev_active (w)]) = (WT)w;
1633 upheap ((WT *)timers, timercnt - 1); 2588 ANHE_at_cache (timers [ev_active (w)]);
2589 upheap (timers, ev_active (w));
1634 2590
2591 EV_FREQUENT_CHECK;
2592
1635 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 2593 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1636} 2594}
1637 2595
1638void noinline 2596void noinline
1639ev_timer_stop (EV_P_ ev_timer *w) 2597ev_timer_stop (EV_P_ ev_timer *w)
1640{ 2598{
1641 clear_pending (EV_A_ (W)w); 2599 clear_pending (EV_A_ (W)w);
1642 if (expect_false (!ev_is_active (w))) 2600 if (expect_false (!ev_is_active (w)))
1643 return; 2601 return;
1644 2602
1645 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2603 EV_FREQUENT_CHECK;
1646 2604
1647 { 2605 {
1648 int active = ((W)w)->active; 2606 int active = ev_active (w);
1649 2607
2608 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2609
2610 --timercnt;
2611
1650 if (expect_true (--active < --timercnt)) 2612 if (expect_true (active < timercnt + HEAP0))
1651 { 2613 {
1652 timers [active] = timers [timercnt]; 2614 timers [active] = timers [timercnt + HEAP0];
1653 adjustheap ((WT *)timers, timercnt, active); 2615 adjustheap (timers, timercnt, active);
1654 } 2616 }
1655 } 2617 }
1656 2618
1657 ((WT)w)->at -= mn_now; 2619 ev_at (w) -= mn_now;
1658 2620
1659 ev_stop (EV_A_ (W)w); 2621 ev_stop (EV_A_ (W)w);
2622
2623 EV_FREQUENT_CHECK;
1660} 2624}
1661 2625
1662void noinline 2626void noinline
1663ev_timer_again (EV_P_ ev_timer *w) 2627ev_timer_again (EV_P_ ev_timer *w)
1664{ 2628{
2629 EV_FREQUENT_CHECK;
2630
1665 if (ev_is_active (w)) 2631 if (ev_is_active (w))
1666 { 2632 {
1667 if (w->repeat) 2633 if (w->repeat)
1668 { 2634 {
1669 ((WT)w)->at = mn_now + w->repeat; 2635 ev_at (w) = mn_now + w->repeat;
2636 ANHE_at_cache (timers [ev_active (w)]);
1670 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2637 adjustheap (timers, timercnt, ev_active (w));
1671 } 2638 }
1672 else 2639 else
1673 ev_timer_stop (EV_A_ w); 2640 ev_timer_stop (EV_A_ w);
1674 } 2641 }
1675 else if (w->repeat) 2642 else if (w->repeat)
1676 { 2643 {
1677 w->at = w->repeat; 2644 ev_at (w) = w->repeat;
1678 ev_timer_start (EV_A_ w); 2645 ev_timer_start (EV_A_ w);
1679 } 2646 }
2647
2648 EV_FREQUENT_CHECK;
2649}
2650
2651ev_tstamp
2652ev_timer_remaining (EV_P_ ev_timer *w)
2653{
2654 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1680} 2655}
1681 2656
1682#if EV_PERIODIC_ENABLE 2657#if EV_PERIODIC_ENABLE
1683void noinline 2658void noinline
1684ev_periodic_start (EV_P_ ev_periodic *w) 2659ev_periodic_start (EV_P_ ev_periodic *w)
1685{ 2660{
1686 if (expect_false (ev_is_active (w))) 2661 if (expect_false (ev_is_active (w)))
1687 return; 2662 return;
1688 2663
1689 if (w->reschedule_cb) 2664 if (w->reschedule_cb)
1690 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2665 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1691 else if (w->interval) 2666 else if (w->interval)
1692 { 2667 {
1693 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2668 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1694 /* this formula differs from the one in periodic_reify because we do not always round up */ 2669 /* this formula differs from the one in periodic_reify because we do not always round up */
1695 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2670 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1696 } 2671 }
2672 else
2673 ev_at (w) = w->offset;
1697 2674
2675 EV_FREQUENT_CHECK;
2676
2677 ++periodiccnt;
1698 ev_start (EV_A_ (W)w, ++periodiccnt); 2678 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1699 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 2679 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1700 periodics [periodiccnt - 1] = w; 2680 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1701 upheap ((WT *)periodics, periodiccnt - 1); 2681 ANHE_at_cache (periodics [ev_active (w)]);
2682 upheap (periodics, ev_active (w));
1702 2683
2684 EV_FREQUENT_CHECK;
2685
1703 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 2686 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1704} 2687}
1705 2688
1706void noinline 2689void noinline
1707ev_periodic_stop (EV_P_ ev_periodic *w) 2690ev_periodic_stop (EV_P_ ev_periodic *w)
1708{ 2691{
1709 clear_pending (EV_A_ (W)w); 2692 clear_pending (EV_A_ (W)w);
1710 if (expect_false (!ev_is_active (w))) 2693 if (expect_false (!ev_is_active (w)))
1711 return; 2694 return;
1712 2695
1713 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2696 EV_FREQUENT_CHECK;
1714 2697
1715 { 2698 {
1716 int active = ((W)w)->active; 2699 int active = ev_active (w);
1717 2700
2701 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2702
2703 --periodiccnt;
2704
1718 if (expect_true (--active < --periodiccnt)) 2705 if (expect_true (active < periodiccnt + HEAP0))
1719 { 2706 {
1720 periodics [active] = periodics [periodiccnt]; 2707 periodics [active] = periodics [periodiccnt + HEAP0];
1721 adjustheap ((WT *)periodics, periodiccnt, active); 2708 adjustheap (periodics, periodiccnt, active);
1722 } 2709 }
1723 } 2710 }
1724 2711
1725 ev_stop (EV_A_ (W)w); 2712 ev_stop (EV_A_ (W)w);
2713
2714 EV_FREQUENT_CHECK;
1726} 2715}
1727 2716
1728void noinline 2717void noinline
1729ev_periodic_again (EV_P_ ev_periodic *w) 2718ev_periodic_again (EV_P_ ev_periodic *w)
1730{ 2719{
… …
1739#endif 2728#endif
1740 2729
1741void noinline 2730void noinline
1742ev_signal_start (EV_P_ ev_signal *w) 2731ev_signal_start (EV_P_ ev_signal *w)
1743{ 2732{
1744#if EV_MULTIPLICITY
1745 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1746#endif
1747 if (expect_false (ev_is_active (w))) 2733 if (expect_false (ev_is_active (w)))
1748 return; 2734 return;
1749 2735
1750 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 2736 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2737
2738#if EV_MULTIPLICITY
2739 assert (("libev: a signal must not be attached to two different loops",
2740 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2741
2742 signals [w->signum - 1].loop = EV_A;
2743#endif
2744
2745 EV_FREQUENT_CHECK;
2746
2747#if EV_USE_SIGNALFD
2748 if (sigfd == -2)
2749 {
2750 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2751 if (sigfd < 0 && errno == EINVAL)
2752 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2753
2754 if (sigfd >= 0)
2755 {
2756 fd_intern (sigfd); /* doing it twice will not hurt */
2757
2758 sigemptyset (&sigfd_set);
2759
2760 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2761 ev_set_priority (&sigfd_w, EV_MAXPRI);
2762 ev_io_start (EV_A_ &sigfd_w);
2763 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2764 }
2765 }
2766
2767 if (sigfd >= 0)
2768 {
2769 /* TODO: check .head */
2770 sigaddset (&sigfd_set, w->signum);
2771 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2772
2773 signalfd (sigfd, &sigfd_set, 0);
2774 }
2775#endif
1751 2776
1752 ev_start (EV_A_ (W)w, 1); 2777 ev_start (EV_A_ (W)w, 1);
1753 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1754 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w); 2778 wlist_add (&signals [w->signum - 1].head, (WL)w);
1755 2779
1756 if (!((WL)w)->next) 2780 if (!((WL)w)->next)
2781# if EV_USE_SIGNALFD
2782 if (sigfd < 0) /*TODO*/
2783# endif
1757 { 2784 {
1758#if _WIN32 2785# ifdef _WIN32
2786 evpipe_init (EV_A);
2787
1759 signal (w->signum, sighandler); 2788 signal (w->signum, ev_sighandler);
1760#else 2789# else
1761 struct sigaction sa; 2790 struct sigaction sa;
2791
2792 evpipe_init (EV_A);
2793
1762 sa.sa_handler = sighandler; 2794 sa.sa_handler = ev_sighandler;
1763 sigfillset (&sa.sa_mask); 2795 sigfillset (&sa.sa_mask);
1764 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 2796 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1765 sigaction (w->signum, &sa, 0); 2797 sigaction (w->signum, &sa, 0);
2798
2799 sigemptyset (&sa.sa_mask);
2800 sigaddset (&sa.sa_mask, w->signum);
2801 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
1766#endif 2802#endif
1767 } 2803 }
2804
2805 EV_FREQUENT_CHECK;
1768} 2806}
1769 2807
1770void noinline 2808void noinline
1771ev_signal_stop (EV_P_ ev_signal *w) 2809ev_signal_stop (EV_P_ ev_signal *w)
1772{ 2810{
1773 clear_pending (EV_A_ (W)w); 2811 clear_pending (EV_A_ (W)w);
1774 if (expect_false (!ev_is_active (w))) 2812 if (expect_false (!ev_is_active (w)))
1775 return; 2813 return;
1776 2814
2815 EV_FREQUENT_CHECK;
2816
1777 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 2817 wlist_del (&signals [w->signum - 1].head, (WL)w);
1778 ev_stop (EV_A_ (W)w); 2818 ev_stop (EV_A_ (W)w);
1779 2819
1780 if (!signals [w->signum - 1].head) 2820 if (!signals [w->signum - 1].head)
2821 {
2822#if EV_MULTIPLICITY
2823 signals [w->signum - 1].loop = 0; /* unattach from signal */
2824#endif
2825#if EV_USE_SIGNALFD
2826 if (sigfd >= 0)
2827 {
2828 sigset_t ss;
2829
2830 sigemptyset (&ss);
2831 sigaddset (&ss, w->signum);
2832 sigdelset (&sigfd_set, w->signum);
2833
2834 signalfd (sigfd, &sigfd_set, 0);
2835 sigprocmask (SIG_UNBLOCK, &ss, 0);
2836 }
2837 else
2838#endif
1781 signal (w->signum, SIG_DFL); 2839 signal (w->signum, SIG_DFL);
2840 }
2841
2842 EV_FREQUENT_CHECK;
1782} 2843}
1783 2844
1784void 2845void
1785ev_child_start (EV_P_ ev_child *w) 2846ev_child_start (EV_P_ ev_child *w)
1786{ 2847{
1787#if EV_MULTIPLICITY 2848#if EV_MULTIPLICITY
1788 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 2849 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1789#endif 2850#endif
1790 if (expect_false (ev_is_active (w))) 2851 if (expect_false (ev_is_active (w)))
1791 return; 2852 return;
1792 2853
2854 EV_FREQUENT_CHECK;
2855
1793 ev_start (EV_A_ (W)w, 1); 2856 ev_start (EV_A_ (W)w, 1);
1794 wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 2857 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2858
2859 EV_FREQUENT_CHECK;
1795} 2860}
1796 2861
1797void 2862void
1798ev_child_stop (EV_P_ ev_child *w) 2863ev_child_stop (EV_P_ ev_child *w)
1799{ 2864{
1800 clear_pending (EV_A_ (W)w); 2865 clear_pending (EV_A_ (W)w);
1801 if (expect_false (!ev_is_active (w))) 2866 if (expect_false (!ev_is_active (w)))
1802 return; 2867 return;
1803 2868
2869 EV_FREQUENT_CHECK;
2870
1804 wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 2871 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1805 ev_stop (EV_A_ (W)w); 2872 ev_stop (EV_A_ (W)w);
2873
2874 EV_FREQUENT_CHECK;
1806} 2875}
1807 2876
1808#if EV_STAT_ENABLE 2877#if EV_STAT_ENABLE
1809 2878
1810# ifdef _WIN32 2879# ifdef _WIN32
1811# undef lstat 2880# undef lstat
1812# define lstat(a,b) _stati64 (a,b) 2881# define lstat(a,b) _stati64 (a,b)
1813# endif 2882# endif
1814 2883
1815#define DEF_STAT_INTERVAL 5.0074891 2884#define DEF_STAT_INTERVAL 5.0074891
2885#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1816#define MIN_STAT_INTERVAL 0.1074891 2886#define MIN_STAT_INTERVAL 0.1074891
1817 2887
1818static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 2888static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1819 2889
1820#if EV_USE_INOTIFY 2890#if EV_USE_INOTIFY
1821# define EV_INOTIFY_BUFSIZE 8192 2891
2892/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2893# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
1822 2894
1823static void noinline 2895static void noinline
1824infy_add (EV_P_ ev_stat *w) 2896infy_add (EV_P_ ev_stat *w)
1825{ 2897{
1826 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); 2898 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);
1827 2899
1828 if (w->wd < 0) 2900 if (w->wd >= 0)
2901 {
2902 struct statfs sfs;
2903
2904 /* now local changes will be tracked by inotify, but remote changes won't */
2905 /* unless the filesystem is known to be local, we therefore still poll */
2906 /* also do poll on <2.6.25, but with normal frequency */
2907
2908 if (!fs_2625)
2909 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2910 else if (!statfs (w->path, &sfs)
2911 && (sfs.f_type == 0x1373 /* devfs */
2912 || sfs.f_type == 0xEF53 /* ext2/3 */
2913 || sfs.f_type == 0x3153464a /* jfs */
2914 || sfs.f_type == 0x52654973 /* reiser3 */
2915 || sfs.f_type == 0x01021994 /* tempfs */
2916 || sfs.f_type == 0x58465342 /* xfs */))
2917 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2918 else
2919 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1829 { 2920 }
1830 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 2921 else
2922 {
2923 /* can't use inotify, continue to stat */
2924 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1831 2925
1832 /* monitor some parent directory for speedup hints */ 2926 /* if path is not there, monitor some parent directory for speedup hints */
2927 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2928 /* but an efficiency issue only */
1833 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 2929 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1834 { 2930 {
1835 char path [4096]; 2931 char path [4096];
1836 strcpy (path, w->path); 2932 strcpy (path, w->path);
1837 2933
… …
1840 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 2936 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1841 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 2937 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1842 2938
1843 char *pend = strrchr (path, '/'); 2939 char *pend = strrchr (path, '/');
1844 2940
1845 if (!pend) 2941 if (!pend || pend == path)
1846 break; /* whoops, no '/', complain to your admin */ 2942 break;
1847 2943
1848 *pend = 0; 2944 *pend = 0;
1849 w->wd = inotify_add_watch (fs_fd, path, mask); 2945 w->wd = inotify_add_watch (fs_fd, path, mask);
1850 } 2946 }
1851 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 2947 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1852 } 2948 }
1853 } 2949 }
1854 else
1855 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1856 2950
1857 if (w->wd >= 0) 2951 if (w->wd >= 0)
1858 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 2952 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2953
2954 /* now re-arm timer, if required */
2955 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2956 ev_timer_again (EV_A_ &w->timer);
2957 if (ev_is_active (&w->timer)) ev_unref (EV_A);
1859} 2958}
1860 2959
1861static void noinline 2960static void noinline
1862infy_del (EV_P_ ev_stat *w) 2961infy_del (EV_P_ ev_stat *w)
1863{ 2962{
… …
1877 2976
1878static void noinline 2977static void noinline
1879infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 2978infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1880{ 2979{
1881 if (slot < 0) 2980 if (slot < 0)
1882 /* overflow, need to check for all hahs slots */ 2981 /* overflow, need to check for all hash slots */
1883 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 2982 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
1884 infy_wd (EV_A_ slot, wd, ev); 2983 infy_wd (EV_A_ slot, wd, ev);
1885 else 2984 else
1886 { 2985 {
1887 WL w_; 2986 WL w_;
… …
1893 2992
1894 if (w->wd == wd || wd == -1) 2993 if (w->wd == wd || wd == -1)
1895 { 2994 {
1896 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 2995 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
1897 { 2996 {
2997 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
1898 w->wd = -1; 2998 w->wd = -1;
1899 infy_add (EV_A_ w); /* re-add, no matter what */ 2999 infy_add (EV_A_ w); /* re-add, no matter what */
1900 } 3000 }
1901 3001
1902 stat_timer_cb (EV_A_ &w->timer, 0); 3002 stat_timer_cb (EV_A_ &w->timer, 0);
… …
1907 3007
1908static void 3008static void
1909infy_cb (EV_P_ ev_io *w, int revents) 3009infy_cb (EV_P_ ev_io *w, int revents)
1910{ 3010{
1911 char buf [EV_INOTIFY_BUFSIZE]; 3011 char buf [EV_INOTIFY_BUFSIZE];
1912 struct inotify_event *ev = (struct inotify_event *)buf;
1913 int ofs; 3012 int ofs;
1914 int len = read (fs_fd, buf, sizeof (buf)); 3013 int len = read (fs_fd, buf, sizeof (buf));
1915 3014
1916 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 3015 for (ofs = 0; ofs < len; )
3016 {
3017 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
1917 infy_wd (EV_A_ ev->wd, ev->wd, ev); 3018 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3019 ofs += sizeof (struct inotify_event) + ev->len;
3020 }
1918} 3021}
1919 3022
1920void inline_size 3023inline_size unsigned int
3024ev_linux_version (void)
3025{
3026 struct utsname buf;
3027 unsigned int v;
3028 int i;
3029 char *p = buf.release;
3030
3031 if (uname (&buf))
3032 return 0;
3033
3034 for (i = 3+1; --i; )
3035 {
3036 unsigned int c = 0;
3037
3038 for (;;)
3039 {
3040 if (*p >= '0' && *p <= '9')
3041 c = c * 10 + *p++ - '0';
3042 else
3043 {
3044 p += *p == '.';
3045 break;
3046 }
3047 }
3048
3049 v = (v << 8) | c;
3050 }
3051
3052 return v;
3053}
3054
3055inline_size void
3056ev_check_2625 (EV_P)
3057{
3058 /* kernels < 2.6.25 are borked
3059 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3060 */
3061 if (ev_linux_version () < 0x020619)
3062 return;
3063
3064 fs_2625 = 1;
3065}
3066
3067inline_size int
3068infy_newfd (void)
3069{
3070#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3071 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3072 if (fd >= 0)
3073 return fd;
3074#endif
3075 return inotify_init ();
3076}
3077
3078inline_size void
1921infy_init (EV_P) 3079infy_init (EV_P)
1922{ 3080{
1923 if (fs_fd != -2) 3081 if (fs_fd != -2)
1924 return; 3082 return;
1925 3083
3084 fs_fd = -1;
3085
3086 ev_check_2625 (EV_A);
3087
1926 fs_fd = inotify_init (); 3088 fs_fd = infy_newfd ();
1927 3089
1928 if (fs_fd >= 0) 3090 if (fs_fd >= 0)
1929 { 3091 {
3092 fd_intern (fs_fd);
1930 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 3093 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
1931 ev_set_priority (&fs_w, EV_MAXPRI); 3094 ev_set_priority (&fs_w, EV_MAXPRI);
1932 ev_io_start (EV_A_ &fs_w); 3095 ev_io_start (EV_A_ &fs_w);
3096 ev_unref (EV_A);
1933 } 3097 }
1934} 3098}
1935 3099
1936void inline_size 3100inline_size void
1937infy_fork (EV_P) 3101infy_fork (EV_P)
1938{ 3102{
1939 int slot; 3103 int slot;
1940 3104
1941 if (fs_fd < 0) 3105 if (fs_fd < 0)
1942 return; 3106 return;
1943 3107
3108 ev_ref (EV_A);
3109 ev_io_stop (EV_A_ &fs_w);
1944 close (fs_fd); 3110 close (fs_fd);
1945 fs_fd = inotify_init (); 3111 fs_fd = infy_newfd ();
3112
3113 if (fs_fd >= 0)
3114 {
3115 fd_intern (fs_fd);
3116 ev_io_set (&fs_w, fs_fd, EV_READ);
3117 ev_io_start (EV_A_ &fs_w);
3118 ev_unref (EV_A);
3119 }
1946 3120
1947 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 3121 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
1948 { 3122 {
1949 WL w_ = fs_hash [slot].head; 3123 WL w_ = fs_hash [slot].head;
1950 fs_hash [slot].head = 0; 3124 fs_hash [slot].head = 0;
… …
1957 w->wd = -1; 3131 w->wd = -1;
1958 3132
1959 if (fs_fd >= 0) 3133 if (fs_fd >= 0)
1960 infy_add (EV_A_ w); /* re-add, no matter what */ 3134 infy_add (EV_A_ w); /* re-add, no matter what */
1961 else 3135 else
3136 {
3137 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3138 if (ev_is_active (&w->timer)) ev_ref (EV_A);
1962 ev_timer_start (EV_A_ &w->timer); 3139 ev_timer_again (EV_A_ &w->timer);
3140 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3141 }
1963 } 3142 }
1964
1965 } 3143 }
1966} 3144}
1967 3145
3146#endif
3147
3148#ifdef _WIN32
3149# define EV_LSTAT(p,b) _stati64 (p, b)
3150#else
3151# define EV_LSTAT(p,b) lstat (p, b)
1968#endif 3152#endif
1969 3153
1970void 3154void
1971ev_stat_stat (EV_P_ ev_stat *w) 3155ev_stat_stat (EV_P_ ev_stat *w)
1972{ 3156{
… …
1979static void noinline 3163static void noinline
1980stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3164stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1981{ 3165{
1982 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3166 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
1983 3167
1984 /* we copy this here each the time so that */ 3168 ev_statdata prev = w->attr;
1985 /* prev has the old value when the callback gets invoked */
1986 w->prev = w->attr;
1987 ev_stat_stat (EV_A_ w); 3169 ev_stat_stat (EV_A_ w);
1988 3170
1989 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 3171 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
1990 if ( 3172 if (
1991 w->prev.st_dev != w->attr.st_dev 3173 prev.st_dev != w->attr.st_dev
1992 || w->prev.st_ino != w->attr.st_ino 3174 || prev.st_ino != w->attr.st_ino
1993 || w->prev.st_mode != w->attr.st_mode 3175 || prev.st_mode != w->attr.st_mode
1994 || w->prev.st_nlink != w->attr.st_nlink 3176 || prev.st_nlink != w->attr.st_nlink
1995 || w->prev.st_uid != w->attr.st_uid 3177 || prev.st_uid != w->attr.st_uid
1996 || w->prev.st_gid != w->attr.st_gid 3178 || prev.st_gid != w->attr.st_gid
1997 || w->prev.st_rdev != w->attr.st_rdev 3179 || prev.st_rdev != w->attr.st_rdev
1998 || w->prev.st_size != w->attr.st_size 3180 || prev.st_size != w->attr.st_size
1999 || w->prev.st_atime != w->attr.st_atime 3181 || prev.st_atime != w->attr.st_atime
2000 || w->prev.st_mtime != w->attr.st_mtime 3182 || prev.st_mtime != w->attr.st_mtime
2001 || w->prev.st_ctime != w->attr.st_ctime 3183 || prev.st_ctime != w->attr.st_ctime
2002 ) { 3184 ) {
3185 /* we only update w->prev on actual differences */
3186 /* in case we test more often than invoke the callback, */
3187 /* to ensure that prev is always different to attr */
3188 w->prev = prev;
3189
2003 #if EV_USE_INOTIFY 3190 #if EV_USE_INOTIFY
3191 if (fs_fd >= 0)
3192 {
2004 infy_del (EV_A_ w); 3193 infy_del (EV_A_ w);
2005 infy_add (EV_A_ w); 3194 infy_add (EV_A_ w);
2006 ev_stat_stat (EV_A_ w); /* avoid race... */ 3195 ev_stat_stat (EV_A_ w); /* avoid race... */
3196 }
2007 #endif 3197 #endif
2008 3198
2009 ev_feed_event (EV_A_ w, EV_STAT); 3199 ev_feed_event (EV_A_ w, EV_STAT);
2010 } 3200 }
2011} 3201}
… …
2014ev_stat_start (EV_P_ ev_stat *w) 3204ev_stat_start (EV_P_ ev_stat *w)
2015{ 3205{
2016 if (expect_false (ev_is_active (w))) 3206 if (expect_false (ev_is_active (w)))
2017 return; 3207 return;
2018 3208
2019 /* since we use memcmp, we need to clear any padding data etc. */
2020 memset (&w->prev, 0, sizeof (ev_statdata));
2021 memset (&w->attr, 0, sizeof (ev_statdata));
2022
2023 ev_stat_stat (EV_A_ w); 3209 ev_stat_stat (EV_A_ w);
2024 3210
3211 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2025 if (w->interval < MIN_STAT_INTERVAL) 3212 w->interval = MIN_STAT_INTERVAL;
2026 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2027 3213
2028 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3214 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2029 ev_set_priority (&w->timer, ev_priority (w)); 3215 ev_set_priority (&w->timer, ev_priority (w));
2030 3216
2031#if EV_USE_INOTIFY 3217#if EV_USE_INOTIFY
2032 infy_init (EV_A); 3218 infy_init (EV_A);
2033 3219
2034 if (fs_fd >= 0) 3220 if (fs_fd >= 0)
2035 infy_add (EV_A_ w); 3221 infy_add (EV_A_ w);
2036 else 3222 else
2037#endif 3223#endif
3224 {
2038 ev_timer_start (EV_A_ &w->timer); 3225 ev_timer_again (EV_A_ &w->timer);
3226 ev_unref (EV_A);
3227 }
2039 3228
2040 ev_start (EV_A_ (W)w, 1); 3229 ev_start (EV_A_ (W)w, 1);
3230
3231 EV_FREQUENT_CHECK;
2041} 3232}
2042 3233
2043void 3234void
2044ev_stat_stop (EV_P_ ev_stat *w) 3235ev_stat_stop (EV_P_ ev_stat *w)
2045{ 3236{
2046 clear_pending (EV_A_ (W)w); 3237 clear_pending (EV_A_ (W)w);
2047 if (expect_false (!ev_is_active (w))) 3238 if (expect_false (!ev_is_active (w)))
2048 return; 3239 return;
2049 3240
3241 EV_FREQUENT_CHECK;
3242
2050#if EV_USE_INOTIFY 3243#if EV_USE_INOTIFY
2051 infy_del (EV_A_ w); 3244 infy_del (EV_A_ w);
2052#endif 3245#endif
3246
3247 if (ev_is_active (&w->timer))
3248 {
3249 ev_ref (EV_A);
2053 ev_timer_stop (EV_A_ &w->timer); 3250 ev_timer_stop (EV_A_ &w->timer);
3251 }
2054 3252
2055 ev_stop (EV_A_ (W)w); 3253 ev_stop (EV_A_ (W)w);
3254
3255 EV_FREQUENT_CHECK;
2056} 3256}
2057#endif 3257#endif
2058 3258
2059#if EV_IDLE_ENABLE 3259#if EV_IDLE_ENABLE
2060void 3260void
… …
2062{ 3262{
2063 if (expect_false (ev_is_active (w))) 3263 if (expect_false (ev_is_active (w)))
2064 return; 3264 return;
2065 3265
2066 pri_adjust (EV_A_ (W)w); 3266 pri_adjust (EV_A_ (W)w);
3267
3268 EV_FREQUENT_CHECK;
2067 3269
2068 { 3270 {
2069 int active = ++idlecnt [ABSPRI (w)]; 3271 int active = ++idlecnt [ABSPRI (w)];
2070 3272
2071 ++idleall; 3273 ++idleall;
2072 ev_start (EV_A_ (W)w, active); 3274 ev_start (EV_A_ (W)w, active);
2073 3275
2074 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 3276 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
2075 idles [ABSPRI (w)][active - 1] = w; 3277 idles [ABSPRI (w)][active - 1] = w;
2076 } 3278 }
3279
3280 EV_FREQUENT_CHECK;
2077} 3281}
2078 3282
2079void 3283void
2080ev_idle_stop (EV_P_ ev_idle *w) 3284ev_idle_stop (EV_P_ ev_idle *w)
2081{ 3285{
2082 clear_pending (EV_A_ (W)w); 3286 clear_pending (EV_A_ (W)w);
2083 if (expect_false (!ev_is_active (w))) 3287 if (expect_false (!ev_is_active (w)))
2084 return; 3288 return;
2085 3289
3290 EV_FREQUENT_CHECK;
3291
2086 { 3292 {
2087 int active = ((W)w)->active; 3293 int active = ev_active (w);
2088 3294
2089 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 3295 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2090 ((W)idles [ABSPRI (w)][active - 1])->active = active; 3296 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2091 3297
2092 ev_stop (EV_A_ (W)w); 3298 ev_stop (EV_A_ (W)w);
2093 --idleall; 3299 --idleall;
2094 } 3300 }
3301
3302 EV_FREQUENT_CHECK;
2095} 3303}
2096#endif 3304#endif
2097 3305
2098void 3306void
2099ev_prepare_start (EV_P_ ev_prepare *w) 3307ev_prepare_start (EV_P_ ev_prepare *w)
2100{ 3308{
2101 if (expect_false (ev_is_active (w))) 3309 if (expect_false (ev_is_active (w)))
2102 return; 3310 return;
3311
3312 EV_FREQUENT_CHECK;
2103 3313
2104 ev_start (EV_A_ (W)w, ++preparecnt); 3314 ev_start (EV_A_ (W)w, ++preparecnt);
2105 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 3315 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
2106 prepares [preparecnt - 1] = w; 3316 prepares [preparecnt - 1] = w;
3317
3318 EV_FREQUENT_CHECK;
2107} 3319}
2108 3320
2109void 3321void
2110ev_prepare_stop (EV_P_ ev_prepare *w) 3322ev_prepare_stop (EV_P_ ev_prepare *w)
2111{ 3323{
2112 clear_pending (EV_A_ (W)w); 3324 clear_pending (EV_A_ (W)w);
2113 if (expect_false (!ev_is_active (w))) 3325 if (expect_false (!ev_is_active (w)))
2114 return; 3326 return;
2115 3327
3328 EV_FREQUENT_CHECK;
3329
2116 { 3330 {
2117 int active = ((W)w)->active; 3331 int active = ev_active (w);
3332
2118 prepares [active - 1] = prepares [--preparecnt]; 3333 prepares [active - 1] = prepares [--preparecnt];
2119 ((W)prepares [active - 1])->active = active; 3334 ev_active (prepares [active - 1]) = active;
2120 } 3335 }
2121 3336
2122 ev_stop (EV_A_ (W)w); 3337 ev_stop (EV_A_ (W)w);
3338
3339 EV_FREQUENT_CHECK;
2123} 3340}
2124 3341
2125void 3342void
2126ev_check_start (EV_P_ ev_check *w) 3343ev_check_start (EV_P_ ev_check *w)
2127{ 3344{
2128 if (expect_false (ev_is_active (w))) 3345 if (expect_false (ev_is_active (w)))
2129 return; 3346 return;
3347
3348 EV_FREQUENT_CHECK;
2130 3349
2131 ev_start (EV_A_ (W)w, ++checkcnt); 3350 ev_start (EV_A_ (W)w, ++checkcnt);
2132 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 3351 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
2133 checks [checkcnt - 1] = w; 3352 checks [checkcnt - 1] = w;
3353
3354 EV_FREQUENT_CHECK;
2134} 3355}
2135 3356
2136void 3357void
2137ev_check_stop (EV_P_ ev_check *w) 3358ev_check_stop (EV_P_ ev_check *w)
2138{ 3359{
2139 clear_pending (EV_A_ (W)w); 3360 clear_pending (EV_A_ (W)w);
2140 if (expect_false (!ev_is_active (w))) 3361 if (expect_false (!ev_is_active (w)))
2141 return; 3362 return;
2142 3363
3364 EV_FREQUENT_CHECK;
3365
2143 { 3366 {
2144 int active = ((W)w)->active; 3367 int active = ev_active (w);
3368
2145 checks [active - 1] = checks [--checkcnt]; 3369 checks [active - 1] = checks [--checkcnt];
2146 ((W)checks [active - 1])->active = active; 3370 ev_active (checks [active - 1]) = active;
2147 } 3371 }
2148 3372
2149 ev_stop (EV_A_ (W)w); 3373 ev_stop (EV_A_ (W)w);
3374
3375 EV_FREQUENT_CHECK;
2150} 3376}
2151 3377
2152#if EV_EMBED_ENABLE 3378#if EV_EMBED_ENABLE
2153void noinline 3379void noinline
2154ev_embed_sweep (EV_P_ ev_embed *w) 3380ev_embed_sweep (EV_P_ ev_embed *w)
2155{ 3381{
2156 ev_loop (w->loop, EVLOOP_NONBLOCK); 3382 ev_loop (w->other, EVLOOP_NONBLOCK);
2157} 3383}
2158 3384
2159static void 3385static void
2160embed_cb (EV_P_ ev_io *io, int revents) 3386embed_io_cb (EV_P_ ev_io *io, int revents)
2161{ 3387{
2162 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3388 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2163 3389
2164 if (ev_cb (w)) 3390 if (ev_cb (w))
2165 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3391 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2166 else 3392 else
2167 ev_embed_sweep (loop, w); 3393 ev_loop (w->other, EVLOOP_NONBLOCK);
2168} 3394}
3395
3396static void
3397embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3398{
3399 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3400
3401 {
3402 EV_P = w->other;
3403
3404 while (fdchangecnt)
3405 {
3406 fd_reify (EV_A);
3407 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3408 }
3409 }
3410}
3411
3412static void
3413embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3414{
3415 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3416
3417 ev_embed_stop (EV_A_ w);
3418
3419 {
3420 EV_P = w->other;
3421
3422 ev_loop_fork (EV_A);
3423 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3424 }
3425
3426 ev_embed_start (EV_A_ w);
3427}
3428
3429#if 0
3430static void
3431embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3432{
3433 ev_idle_stop (EV_A_ idle);
3434}
3435#endif
2169 3436
2170void 3437void
2171ev_embed_start (EV_P_ ev_embed *w) 3438ev_embed_start (EV_P_ ev_embed *w)
2172{ 3439{
2173 if (expect_false (ev_is_active (w))) 3440 if (expect_false (ev_is_active (w)))
2174 return; 3441 return;
2175 3442
2176 { 3443 {
2177 struct ev_loop *loop = w->loop; 3444 EV_P = w->other;
2178 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 3445 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2179 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 3446 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2180 } 3447 }
3448
3449 EV_FREQUENT_CHECK;
2181 3450
2182 ev_set_priority (&w->io, ev_priority (w)); 3451 ev_set_priority (&w->io, ev_priority (w));
2183 ev_io_start (EV_A_ &w->io); 3452 ev_io_start (EV_A_ &w->io);
2184 3453
3454 ev_prepare_init (&w->prepare, embed_prepare_cb);
3455 ev_set_priority (&w->prepare, EV_MINPRI);
3456 ev_prepare_start (EV_A_ &w->prepare);
3457
3458 ev_fork_init (&w->fork, embed_fork_cb);
3459 ev_fork_start (EV_A_ &w->fork);
3460
3461 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3462
2185 ev_start (EV_A_ (W)w, 1); 3463 ev_start (EV_A_ (W)w, 1);
3464
3465 EV_FREQUENT_CHECK;
2186} 3466}
2187 3467
2188void 3468void
2189ev_embed_stop (EV_P_ ev_embed *w) 3469ev_embed_stop (EV_P_ ev_embed *w)
2190{ 3470{
2191 clear_pending (EV_A_ (W)w); 3471 clear_pending (EV_A_ (W)w);
2192 if (expect_false (!ev_is_active (w))) 3472 if (expect_false (!ev_is_active (w)))
2193 return; 3473 return;
2194 3474
3475 EV_FREQUENT_CHECK;
3476
2195 ev_io_stop (EV_A_ &w->io); 3477 ev_io_stop (EV_A_ &w->io);
3478 ev_prepare_stop (EV_A_ &w->prepare);
3479 ev_fork_stop (EV_A_ &w->fork);
2196 3480
2197 ev_stop (EV_A_ (W)w); 3481 ev_stop (EV_A_ (W)w);
3482
3483 EV_FREQUENT_CHECK;
2198} 3484}
2199#endif 3485#endif
2200 3486
2201#if EV_FORK_ENABLE 3487#if EV_FORK_ENABLE
2202void 3488void
2203ev_fork_start (EV_P_ ev_fork *w) 3489ev_fork_start (EV_P_ ev_fork *w)
2204{ 3490{
2205 if (expect_false (ev_is_active (w))) 3491 if (expect_false (ev_is_active (w)))
2206 return; 3492 return;
3493
3494 EV_FREQUENT_CHECK;
2207 3495
2208 ev_start (EV_A_ (W)w, ++forkcnt); 3496 ev_start (EV_A_ (W)w, ++forkcnt);
2209 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 3497 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
2210 forks [forkcnt - 1] = w; 3498 forks [forkcnt - 1] = w;
3499
3500 EV_FREQUENT_CHECK;
2211} 3501}
2212 3502
2213void 3503void
2214ev_fork_stop (EV_P_ ev_fork *w) 3504ev_fork_stop (EV_P_ ev_fork *w)
2215{ 3505{
2216 clear_pending (EV_A_ (W)w); 3506 clear_pending (EV_A_ (W)w);
2217 if (expect_false (!ev_is_active (w))) 3507 if (expect_false (!ev_is_active (w)))
2218 return; 3508 return;
2219 3509
3510 EV_FREQUENT_CHECK;
3511
2220 { 3512 {
2221 int active = ((W)w)->active; 3513 int active = ev_active (w);
3514
2222 forks [active - 1] = forks [--forkcnt]; 3515 forks [active - 1] = forks [--forkcnt];
2223 ((W)forks [active - 1])->active = active; 3516 ev_active (forks [active - 1]) = active;
2224 } 3517 }
2225 3518
2226 ev_stop (EV_A_ (W)w); 3519 ev_stop (EV_A_ (W)w);
3520
3521 EV_FREQUENT_CHECK;
3522}
3523#endif
3524
3525#if EV_ASYNC_ENABLE
3526void
3527ev_async_start (EV_P_ ev_async *w)
3528{
3529 if (expect_false (ev_is_active (w)))
3530 return;
3531
3532 evpipe_init (EV_A);
3533
3534 EV_FREQUENT_CHECK;
3535
3536 ev_start (EV_A_ (W)w, ++asynccnt);
3537 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3538 asyncs [asynccnt - 1] = w;
3539
3540 EV_FREQUENT_CHECK;
3541}
3542
3543void
3544ev_async_stop (EV_P_ ev_async *w)
3545{
3546 clear_pending (EV_A_ (W)w);
3547 if (expect_false (!ev_is_active (w)))
3548 return;
3549
3550 EV_FREQUENT_CHECK;
3551
3552 {
3553 int active = ev_active (w);
3554
3555 asyncs [active - 1] = asyncs [--asynccnt];
3556 ev_active (asyncs [active - 1]) = active;
3557 }
3558
3559 ev_stop (EV_A_ (W)w);
3560
3561 EV_FREQUENT_CHECK;
3562}
3563
3564void
3565ev_async_send (EV_P_ ev_async *w)
3566{
3567 w->sent = 1;
3568 evpipe_write (EV_A_ &async_pending);
2227} 3569}
2228#endif 3570#endif
2229 3571
2230/*****************************************************************************/ 3572/*****************************************************************************/
2231 3573
… …
2241once_cb (EV_P_ struct ev_once *once, int revents) 3583once_cb (EV_P_ struct ev_once *once, int revents)
2242{ 3584{
2243 void (*cb)(int revents, void *arg) = once->cb; 3585 void (*cb)(int revents, void *arg) = once->cb;
2244 void *arg = once->arg; 3586 void *arg = once->arg;
2245 3587
2246 ev_io_stop (EV_A_ &once->io); 3588 ev_io_stop (EV_A_ &once->io);
2247 ev_timer_stop (EV_A_ &once->to); 3589 ev_timer_stop (EV_A_ &once->to);
2248 ev_free (once); 3590 ev_free (once);
2249 3591
2250 cb (revents, arg); 3592 cb (revents, arg);
2251} 3593}
2252 3594
2253static void 3595static void
2254once_cb_io (EV_P_ ev_io *w, int revents) 3596once_cb_io (EV_P_ ev_io *w, int revents)
2255{ 3597{
2256 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3598 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3599
3600 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2257} 3601}
2258 3602
2259static void 3603static void
2260once_cb_to (EV_P_ ev_timer *w, int revents) 3604once_cb_to (EV_P_ ev_timer *w, int revents)
2261{ 3605{
2262 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3606 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3607
3608 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
2263} 3609}
2264 3610
2265void 3611void
2266ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3612ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
2267{ 3613{
… …
2289 ev_timer_set (&once->to, timeout, 0.); 3635 ev_timer_set (&once->to, timeout, 0.);
2290 ev_timer_start (EV_A_ &once->to); 3636 ev_timer_start (EV_A_ &once->to);
2291 } 3637 }
2292} 3638}
2293 3639
3640/*****************************************************************************/
3641
3642#if EV_WALK_ENABLE
3643void
3644ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3645{
3646 int i, j;
3647 ev_watcher_list *wl, *wn;
3648
3649 if (types & (EV_IO | EV_EMBED))
3650 for (i = 0; i < anfdmax; ++i)
3651 for (wl = anfds [i].head; wl; )
3652 {
3653 wn = wl->next;
3654
3655#if EV_EMBED_ENABLE
3656 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3657 {
3658 if (types & EV_EMBED)
3659 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3660 }
3661 else
3662#endif
3663#if EV_USE_INOTIFY
3664 if (ev_cb ((ev_io *)wl) == infy_cb)
3665 ;
3666 else
3667#endif
3668 if ((ev_io *)wl != &pipe_w)
3669 if (types & EV_IO)
3670 cb (EV_A_ EV_IO, wl);
3671
3672 wl = wn;
3673 }
3674
3675 if (types & (EV_TIMER | EV_STAT))
3676 for (i = timercnt + HEAP0; i-- > HEAP0; )
3677#if EV_STAT_ENABLE
3678 /*TODO: timer is not always active*/
3679 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3680 {
3681 if (types & EV_STAT)
3682 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3683 }
3684 else
3685#endif
3686 if (types & EV_TIMER)
3687 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3688
3689#if EV_PERIODIC_ENABLE
3690 if (types & EV_PERIODIC)
3691 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3692 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3693#endif
3694
3695#if EV_IDLE_ENABLE
3696 if (types & EV_IDLE)
3697 for (j = NUMPRI; i--; )
3698 for (i = idlecnt [j]; i--; )
3699 cb (EV_A_ EV_IDLE, idles [j][i]);
3700#endif
3701
3702#if EV_FORK_ENABLE
3703 if (types & EV_FORK)
3704 for (i = forkcnt; i--; )
3705 if (ev_cb (forks [i]) != embed_fork_cb)
3706 cb (EV_A_ EV_FORK, forks [i]);
3707#endif
3708
3709#if EV_ASYNC_ENABLE
3710 if (types & EV_ASYNC)
3711 for (i = asynccnt; i--; )
3712 cb (EV_A_ EV_ASYNC, asyncs [i]);
3713#endif
3714
3715 if (types & EV_PREPARE)
3716 for (i = preparecnt; i--; )
3717#if EV_EMBED_ENABLE
3718 if (ev_cb (prepares [i]) != embed_prepare_cb)
3719#endif
3720 cb (EV_A_ EV_PREPARE, prepares [i]);
3721
3722 if (types & EV_CHECK)
3723 for (i = checkcnt; i--; )
3724 cb (EV_A_ EV_CHECK, checks [i]);
3725
3726 if (types & EV_SIGNAL)
3727 for (i = 0; i < EV_NSIG - 1; ++i)
3728 for (wl = signals [i].head; wl; )
3729 {
3730 wn = wl->next;
3731 cb (EV_A_ EV_SIGNAL, wl);
3732 wl = wn;
3733 }
3734
3735 if (types & EV_CHILD)
3736 for (i = EV_PID_HASHSIZE; i--; )
3737 for (wl = childs [i]; wl; )
3738 {
3739 wn = wl->next;
3740 cb (EV_A_ EV_CHILD, wl);
3741 wl = wn;
3742 }
3743/* EV_STAT 0x00001000 /* stat data changed */
3744/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3745}
3746#endif
3747
3748#if EV_MULTIPLICITY
3749 #include "ev_wrap.h"
3750#endif
3751
2294#ifdef __cplusplus 3752#ifdef __cplusplus
2295} 3753}
2296#endif 3754#endif
2297 3755

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