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Comparing libev/ev.c (file contents):
Revision 1.142 by root, Tue Nov 27 06:19:08 2007 UTC vs.
Revision 1.332 by root, Tue Mar 9 08:58:17 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
… …
94# else 125# else
95# define EV_USE_PORT 0 126# define EV_USE_PORT 0
96# endif 127# endif
97# endif 128# endif
98 129
130# ifndef EV_USE_INOTIFY
131# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
132# define EV_USE_INOTIFY 1
133# else
134# define EV_USE_INOTIFY 0
135# endif
136# endif
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
99#endif 154#endif
100 155
101#include <math.h> 156#include <math.h>
102#include <stdlib.h> 157#include <stdlib.h>
158#include <string.h>
103#include <fcntl.h> 159#include <fcntl.h>
104#include <stddef.h> 160#include <stddef.h>
105 161
106#include <stdio.h> 162#include <stdio.h>
107 163
108#include <assert.h> 164#include <assert.h>
109#include <errno.h> 165#include <errno.h>
110#include <sys/types.h> 166#include <sys/types.h>
111#include <time.h> 167#include <time.h>
168#include <limits.h>
112 169
113#include <signal.h> 170#include <signal.h>
171
172#ifdef EV_H
173# include EV_H
174#else
175# include "ev.h"
176#endif
114 177
115#ifndef _WIN32 178#ifndef _WIN32
116# include <sys/time.h> 179# include <sys/time.h>
117# include <sys/wait.h> 180# include <sys/wait.h>
118# include <unistd.h> 181# include <unistd.h>
119#else 182#else
183# include <io.h>
120# define WIN32_LEAN_AND_MEAN 184# define WIN32_LEAN_AND_MEAN
121# include <windows.h> 185# include <windows.h>
122# ifndef EV_SELECT_IS_WINSOCKET 186# ifndef EV_SELECT_IS_WINSOCKET
123# define EV_SELECT_IS_WINSOCKET 1 187# define EV_SELECT_IS_WINSOCKET 1
124# 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
125#endif 226# endif
126 227#endif
127/**/
128 228
129#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
130# define EV_USE_MONOTONIC 0 233# define EV_USE_MONOTONIC 0
234# endif
131#endif 235#endif
132 236
133#ifndef EV_USE_REALTIME 237#ifndef EV_USE_REALTIME
134# 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
135#endif 247#endif
136 248
137#ifndef EV_USE_SELECT 249#ifndef EV_USE_SELECT
138# define EV_USE_SELECT 1 250# define EV_USE_SELECT 1
139#endif 251#endif
… …
145# define EV_USE_POLL 1 257# define EV_USE_POLL 1
146# endif 258# endif
147#endif 259#endif
148 260
149#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
150# define EV_USE_EPOLL 0 265# define EV_USE_EPOLL 0
266# endif
151#endif 267#endif
152 268
153#ifndef EV_USE_KQUEUE 269#ifndef EV_USE_KQUEUE
154# define EV_USE_KQUEUE 0 270# define EV_USE_KQUEUE 0
155#endif 271#endif
156 272
157#ifndef EV_USE_PORT 273#ifndef EV_USE_PORT
158# define EV_USE_PORT 0 274# define EV_USE_PORT 0
159#endif 275#endif
160 276
161/**/ 277#ifndef EV_USE_INOTIFY
278# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
279# define EV_USE_INOTIFY 1
280# else
281# define EV_USE_INOTIFY 0
282# endif
283#endif
284
285#ifndef EV_PID_HASHSIZE
286# if EV_MINIMAL
287# define EV_PID_HASHSIZE 1
288# else
289# define EV_PID_HASHSIZE 16
290# endif
291#endif
292
293#ifndef EV_INOTIFY_HASHSIZE
294# if EV_MINIMAL
295# define EV_INOTIFY_HASHSIZE 1
296# else
297# define EV_INOTIFY_HASHSIZE 16
298# endif
299#endif
300
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
162 356
163#ifndef CLOCK_MONOTONIC 357#ifndef CLOCK_MONOTONIC
164# undef EV_USE_MONOTONIC 358# undef EV_USE_MONOTONIC
165# define EV_USE_MONOTONIC 0 359# define EV_USE_MONOTONIC 0
166#endif 360#endif
… …
168#ifndef CLOCK_REALTIME 362#ifndef CLOCK_REALTIME
169# undef EV_USE_REALTIME 363# undef EV_USE_REALTIME
170# define EV_USE_REALTIME 0 364# define EV_USE_REALTIME 0
171#endif 365#endif
172 366
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
173#if EV_SELECT_IS_WINSOCKET 389#if EV_SELECT_IS_WINSOCKET
174# include <winsock.h> 390# include <winsock.h>
175#endif 391#endif
176 392
393#if EV_USE_EVENTFD
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
398# endif
399# ifndef EFD_CLOEXEC
400# ifdef O_CLOEXEC
401# define EFD_CLOEXEC O_CLOEXEC
402# else
403# define EFD_CLOEXEC 02000000
404# 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
443
177/**/ 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 */
178 461
179#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) */
180#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) */
181#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
182/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
183 464
184#ifdef EV_H
185# include EV_H
186#else
187# include "ev.h"
188#endif
189
190#if __GNUC__ >= 3 465#if __GNUC__ >= 4
191# define expect(expr,value) __builtin_expect ((expr),(value)) 466# define expect(expr,value) __builtin_expect ((expr),(value))
192# define inline_size static inline /* inline for codesize */
193# if EV_MINIMAL
194# define noinline __attribute__ ((noinline)) 467# define noinline __attribute__ ((noinline))
195# define inline_speed static noinline
196# else
197# define noinline
198# define inline_speed static inline
199# endif
200#else 468#else
201# define expect(expr,value) (expr) 469# define expect(expr,value) (expr)
202# define inline_speed static
203# define inline_minimal static
204# define noinline 470# define noinline
471# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
472# define inline
473# endif
205#endif 474#endif
206 475
207#define expect_false(expr) expect ((expr) != 0, 0) 476#define expect_false(expr) expect ((expr) != 0, 0)
208#define expect_true(expr) expect ((expr) != 0, 1) 477#define expect_true(expr) expect ((expr) != 0, 1)
478#define inline_size static inline
209 479
480#if EV_MINIMAL
481# define inline_speed static noinline
482#else
483# define inline_speed static inline
484#endif
485
210#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
211#define ABSPRI(w) ((w)->priority - EV_MINPRI) 491# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
492#endif
212 493
213#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ 494#define EMPTY /* required for microsofts broken pseudo-c compiler */
214#define EMPTY2(a,b) /* used to suppress some warnings */ 495#define EMPTY2(a,b) /* used to suppress some warnings */
215 496
216typedef ev_watcher *W; 497typedef ev_watcher *W;
217typedef ev_watcher_list *WL; 498typedef ev_watcher_list *WL;
218typedef ev_watcher_time *WT; 499typedef ev_watcher_time *WT;
219 500
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
220static 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
221 523
222#ifdef _WIN32 524#ifdef _WIN32
223# include "ev_win32.c" 525# include "ev_win32.c"
224#endif 526#endif
225 527
226/*****************************************************************************/ 528/*****************************************************************************/
227 529
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
228static void (*syserr_cb)(const char *msg); 538static void (*syserr_cb)(const char *msg);
229 539
230void 540void
231ev_set_syserr_cb (void (*cb)(const char *msg)) 541ev_set_syserr_cb (void (*cb)(const char *msg))
232{ 542{
233 syserr_cb = cb; 543 syserr_cb = cb;
234} 544}
235 545
236static void noinline 546static void noinline
237syserr (const char *msg) 547ev_syserr (const char *msg)
238{ 548{
239 if (!msg) 549 if (!msg)
240 msg = "(libev) system error"; 550 msg = "(libev) system error";
241 551
242 if (syserr_cb) 552 if (syserr_cb)
243 syserr_cb (msg); 553 syserr_cb (msg);
244 else 554 else
245 { 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
246 perror (msg); 564 perror (msg);
565#endif
247 abort (); 566 abort ();
248 } 567 }
249} 568}
250 569
570static void *
571ev_realloc_emul (void *ptr, long size)
572{
573 /* some systems, notably openbsd and darwin, fail to properly
574 * implement realloc (x, 0) (as required by both ansi c-98 and
575 * the single unix specification, so work around them here.
576 */
577 if (size)
578 return realloc (ptr, size);
579
580 free (ptr);
581 return 0;
582}
583
251static void *(*alloc)(void *ptr, long size); 584static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
252 585
253void 586void
254ev_set_allocator (void *(*cb)(void *ptr, long size)) 587ev_set_allocator (void *(*cb)(void *ptr, long size))
255{ 588{
256 alloc = cb; 589 alloc = cb;
257} 590}
258 591
259static void * 592inline_speed void *
260ev_realloc (void *ptr, long size) 593ev_realloc (void *ptr, long size)
261{ 594{
262 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 595 ptr = alloc (ptr, size);
263 596
264 if (!ptr && size) 597 if (!ptr && size)
265 { 598 {
599#if EV_AVOID_STDIO
600 ev_printerr ("libev: memory allocation failed, aborting.\n");
601#else
266 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 602 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
603#endif
267 abort (); 604 abort ();
268 } 605 }
269 606
270 return ptr; 607 return ptr;
271} 608}
… …
273#define ev_malloc(size) ev_realloc (0, (size)) 610#define ev_malloc(size) ev_realloc (0, (size))
274#define ev_free(ptr) ev_realloc ((ptr), 0) 611#define ev_free(ptr) ev_realloc ((ptr), 0)
275 612
276/*****************************************************************************/ 613/*****************************************************************************/
277 614
615/* set in reify when reification needed */
616#define EV_ANFD_REIFY 1
617
618/* file descriptor info structure */
278typedef struct 619typedef struct
279{ 620{
280 WL head; 621 WL head;
281 unsigned char events; 622 unsigned char events; /* the events watched for */
623 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
624 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
282 unsigned char reify; 625 unsigned char unused;
626#if EV_USE_EPOLL
627 unsigned int egen; /* generation counter to counter epoll bugs */
628#endif
283#if EV_SELECT_IS_WINSOCKET 629#if EV_SELECT_IS_WINSOCKET
284 SOCKET handle; 630 SOCKET handle;
285#endif 631#endif
286} ANFD; 632} ANFD;
287 633
634/* stores the pending event set for a given watcher */
288typedef struct 635typedef struct
289{ 636{
290 W w; 637 W w;
291 int events; 638 int events; /* the pending event set for the given watcher */
292} ANPENDING; 639} ANPENDING;
640
641#if EV_USE_INOTIFY
642/* hash table entry per inotify-id */
643typedef struct
644{
645 WL head;
646} ANFS;
647#endif
648
649/* Heap Entry */
650#if EV_HEAP_CACHE_AT
651 /* a heap element */
652 typedef struct {
653 ev_tstamp at;
654 WT w;
655 } ANHE;
656
657 #define ANHE_w(he) (he).w /* access watcher, read-write */
658 #define ANHE_at(he) (he).at /* access cached at, read-only */
659 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
660#else
661 /* a heap element */
662 typedef WT ANHE;
663
664 #define ANHE_w(he) (he)
665 #define ANHE_at(he) (he)->at
666 #define ANHE_at_cache(he)
667#endif
293 668
294#if EV_MULTIPLICITY 669#if EV_MULTIPLICITY
295 670
296 struct ev_loop 671 struct ev_loop
297 { 672 {
… …
315 690
316 static int ev_default_loop_ptr; 691 static int ev_default_loop_ptr;
317 692
318#endif 693#endif
319 694
695#if EV_MINIMAL < 2
696# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
697# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
698# define EV_INVOKE_PENDING invoke_cb (EV_A)
699#else
700# define EV_RELEASE_CB (void)0
701# define EV_ACQUIRE_CB (void)0
702# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
703#endif
704
705#define EVUNLOOP_RECURSE 0x80
706
320/*****************************************************************************/ 707/*****************************************************************************/
321 708
709#ifndef EV_HAVE_EV_TIME
322ev_tstamp 710ev_tstamp
323ev_time (void) 711ev_time (void)
324{ 712{
325#if EV_USE_REALTIME 713#if EV_USE_REALTIME
714 if (expect_true (have_realtime))
715 {
326 struct timespec ts; 716 struct timespec ts;
327 clock_gettime (CLOCK_REALTIME, &ts); 717 clock_gettime (CLOCK_REALTIME, &ts);
328 return ts.tv_sec + ts.tv_nsec * 1e-9; 718 return ts.tv_sec + ts.tv_nsec * 1e-9;
329#else 719 }
720#endif
721
330 struct timeval tv; 722 struct timeval tv;
331 gettimeofday (&tv, 0); 723 gettimeofday (&tv, 0);
332 return tv.tv_sec + tv.tv_usec * 1e-6; 724 return tv.tv_sec + tv.tv_usec * 1e-6;
333#endif
334} 725}
726#endif
335 727
336ev_tstamp inline_size 728inline_size ev_tstamp
337get_clock (void) 729get_clock (void)
338{ 730{
339#if EV_USE_MONOTONIC 731#if EV_USE_MONOTONIC
340 if (expect_true (have_monotonic)) 732 if (expect_true (have_monotonic))
341 { 733 {
… …
354{ 746{
355 return ev_rt_now; 747 return ev_rt_now;
356} 748}
357#endif 749#endif
358 750
359#define array_roundsize(type,n) (((n) | 4) & ~3) 751void
752ev_sleep (ev_tstamp delay)
753{
754 if (delay > 0.)
755 {
756#if EV_USE_NANOSLEEP
757 struct timespec ts;
758
759 ts.tv_sec = (time_t)delay;
760 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
761
762 nanosleep (&ts, 0);
763#elif defined(_WIN32)
764 Sleep ((unsigned long)(delay * 1e3));
765#else
766 struct timeval tv;
767
768 tv.tv_sec = (time_t)delay;
769 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
770
771 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
772 /* something not guaranteed by newer posix versions, but guaranteed */
773 /* by older ones */
774 select (0, 0, 0, 0, &tv);
775#endif
776 }
777}
778
779/*****************************************************************************/
780
781#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
782
783/* find a suitable new size for the given array, */
784/* hopefully by rounding to a ncie-to-malloc size */
785inline_size int
786array_nextsize (int elem, int cur, int cnt)
787{
788 int ncur = cur + 1;
789
790 do
791 ncur <<= 1;
792 while (cnt > ncur);
793
794 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
795 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
796 {
797 ncur *= elem;
798 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
799 ncur = ncur - sizeof (void *) * 4;
800 ncur /= elem;
801 }
802
803 return ncur;
804}
805
806static noinline void *
807array_realloc (int elem, void *base, int *cur, int cnt)
808{
809 *cur = array_nextsize (elem, *cur, cnt);
810 return ev_realloc (base, elem * *cur);
811}
812
813#define array_init_zero(base,count) \
814 memset ((void *)(base), 0, sizeof (*(base)) * (count))
360 815
361#define array_needsize(type,base,cur,cnt,init) \ 816#define array_needsize(type,base,cur,cnt,init) \
362 if (expect_false ((cnt) > cur)) \ 817 if (expect_false ((cnt) > (cur))) \
363 { \ 818 { \
364 int newcnt = cur; \ 819 int ocur_ = (cur); \
365 do \ 820 (base) = (type *)array_realloc \
366 { \ 821 (sizeof (type), (base), &(cur), (cnt)); \
367 newcnt = array_roundsize (type, newcnt << 1); \ 822 init ((base) + (ocur_), (cur) - ocur_); \
368 } \
369 while ((cnt) > newcnt); \
370 \
371 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
372 init (base + cur, newcnt - cur); \
373 cur = newcnt; \
374 } 823 }
375 824
825#if 0
376#define array_slim(type,stem) \ 826#define array_slim(type,stem) \
377 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 827 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
378 { \ 828 { \
379 stem ## max = array_roundsize (stem ## cnt >> 1); \ 829 stem ## max = array_roundsize (stem ## cnt >> 1); \
380 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 830 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
381 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 831 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
382 } 832 }
833#endif
383 834
384#define array_free(stem, idx) \ 835#define array_free(stem, idx) \
385 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 836 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
386 837
387/*****************************************************************************/ 838/*****************************************************************************/
839
840/* dummy callback for pending events */
841static void noinline
842pendingcb (EV_P_ ev_prepare *w, int revents)
843{
844}
388 845
389void noinline 846void noinline
390ev_feed_event (EV_P_ void *w, int revents) 847ev_feed_event (EV_P_ void *w, int revents)
391{ 848{
392 W w_ = (W)w; 849 W w_ = (W)w;
850 int pri = ABSPRI (w_);
393 851
394 if (expect_false (w_->pending)) 852 if (expect_false (w_->pending))
853 pendings [pri][w_->pending - 1].events |= revents;
854 else
395 { 855 {
856 w_->pending = ++pendingcnt [pri];
857 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
858 pendings [pri][w_->pending - 1].w = w_;
396 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 859 pendings [pri][w_->pending - 1].events = revents;
397 return;
398 } 860 }
399
400 w_->pending = ++pendingcnt [ABSPRI (w_)];
401 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
402 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
403 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
404} 861}
405 862
406void inline_size 863inline_speed void
864feed_reverse (EV_P_ W w)
865{
866 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
867 rfeeds [rfeedcnt++] = w;
868}
869
870inline_size void
871feed_reverse_done (EV_P_ int revents)
872{
873 do
874 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
875 while (rfeedcnt);
876}
877
878inline_speed void
407queue_events (EV_P_ W *events, int eventcnt, int type) 879queue_events (EV_P_ W *events, int eventcnt, int type)
408{ 880{
409 int i; 881 int i;
410 882
411 for (i = 0; i < eventcnt; ++i) 883 for (i = 0; i < eventcnt; ++i)
412 ev_feed_event (EV_A_ events [i], type); 884 ev_feed_event (EV_A_ events [i], type);
413} 885}
414 886
415/*****************************************************************************/ 887/*****************************************************************************/
416 888
417void inline_size 889inline_speed void
418anfds_init (ANFD *base, int count)
419{
420 while (count--)
421 {
422 base->head = 0;
423 base->events = EV_NONE;
424 base->reify = 0;
425
426 ++base;
427 }
428}
429
430void inline_speed
431fd_event (EV_P_ int fd, int revents) 890fd_event_nc (EV_P_ int fd, int revents)
432{ 891{
433 ANFD *anfd = anfds + fd; 892 ANFD *anfd = anfds + fd;
434 ev_io *w; 893 ev_io *w;
435 894
436 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 895 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
440 if (ev) 899 if (ev)
441 ev_feed_event (EV_A_ (W)w, ev); 900 ev_feed_event (EV_A_ (W)w, ev);
442 } 901 }
443} 902}
444 903
904/* do not submit kernel events for fds that have reify set */
905/* because that means they changed while we were polling for new events */
906inline_speed void
907fd_event (EV_P_ int fd, int revents)
908{
909 ANFD *anfd = anfds + fd;
910
911 if (expect_true (!anfd->reify))
912 fd_event_nc (EV_A_ fd, revents);
913}
914
445void 915void
446ev_feed_fd_event (EV_P_ int fd, int revents) 916ev_feed_fd_event (EV_P_ int fd, int revents)
447{ 917{
918 if (fd >= 0 && fd < anfdmax)
448 fd_event (EV_A_ fd, revents); 919 fd_event_nc (EV_A_ fd, revents);
449} 920}
450 921
451void inline_size 922/* make sure the external fd watch events are in-sync */
923/* with the kernel/libev internal state */
924inline_size void
452fd_reify (EV_P) 925fd_reify (EV_P)
453{ 926{
454 int i; 927 int i;
455 928
456 for (i = 0; i < fdchangecnt; ++i) 929 for (i = 0; i < fdchangecnt; ++i)
457 { 930 {
458 int fd = fdchanges [i]; 931 int fd = fdchanges [i];
459 ANFD *anfd = anfds + fd; 932 ANFD *anfd = anfds + fd;
460 ev_io *w; 933 ev_io *w;
461 934
462 int events = 0; 935 unsigned char events = 0;
463 936
464 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 937 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
465 events |= w->events; 938 events |= (unsigned char)w->events;
466 939
467#if EV_SELECT_IS_WINSOCKET 940#if EV_SELECT_IS_WINSOCKET
468 if (events) 941 if (events)
469 { 942 {
470 unsigned long argp; 943 unsigned long arg;
471 anfd->handle = _get_osfhandle (fd); 944 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
472 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 945 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
473 } 946 }
474#endif 947#endif
475 948
949 {
950 unsigned char o_events = anfd->events;
951 unsigned char o_reify = anfd->reify;
952
476 anfd->reify = 0; 953 anfd->reify = 0;
477
478 backend_modify (EV_A_ fd, anfd->events, events);
479 anfd->events = events; 954 anfd->events = events;
955
956 if (o_events != events || o_reify & EV__IOFDSET)
957 backend_modify (EV_A_ fd, o_events, events);
958 }
480 } 959 }
481 960
482 fdchangecnt = 0; 961 fdchangecnt = 0;
483} 962}
484 963
485void inline_size 964/* something about the given fd changed */
965inline_size void
486fd_change (EV_P_ int fd) 966fd_change (EV_P_ int fd, int flags)
487{ 967{
488 if (expect_false (anfds [fd].reify)) 968 unsigned char reify = anfds [fd].reify;
489 return;
490
491 anfds [fd].reify = 1; 969 anfds [fd].reify |= flags;
492 970
971 if (expect_true (!reify))
972 {
493 ++fdchangecnt; 973 ++fdchangecnt;
494 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 974 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
495 fdchanges [fdchangecnt - 1] = fd; 975 fdchanges [fdchangecnt - 1] = fd;
976 }
496} 977}
497 978
498void inline_speed 979/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
980inline_speed void
499fd_kill (EV_P_ int fd) 981fd_kill (EV_P_ int fd)
500{ 982{
501 ev_io *w; 983 ev_io *w;
502 984
503 while ((w = (ev_io *)anfds [fd].head)) 985 while ((w = (ev_io *)anfds [fd].head))
… …
505 ev_io_stop (EV_A_ w); 987 ev_io_stop (EV_A_ w);
506 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 988 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
507 } 989 }
508} 990}
509 991
510int inline_size 992/* check whether the given fd is atcually valid, for error recovery */
993inline_size int
511fd_valid (int fd) 994fd_valid (int fd)
512{ 995{
513#ifdef _WIN32 996#ifdef _WIN32
514 return _get_osfhandle (fd) != -1; 997 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
515#else 998#else
516 return fcntl (fd, F_GETFD) != -1; 999 return fcntl (fd, F_GETFD) != -1;
517#endif 1000#endif
518} 1001}
519 1002
… …
523{ 1006{
524 int fd; 1007 int fd;
525 1008
526 for (fd = 0; fd < anfdmax; ++fd) 1009 for (fd = 0; fd < anfdmax; ++fd)
527 if (anfds [fd].events) 1010 if (anfds [fd].events)
528 if (!fd_valid (fd) == -1 && errno == EBADF) 1011 if (!fd_valid (fd) && errno == EBADF)
529 fd_kill (EV_A_ fd); 1012 fd_kill (EV_A_ fd);
530} 1013}
531 1014
532/* called on ENOMEM in select/poll to kill some fds and retry */ 1015/* called on ENOMEM in select/poll to kill some fds and retry */
533static void noinline 1016static void noinline
… …
537 1020
538 for (fd = anfdmax; fd--; ) 1021 for (fd = anfdmax; fd--; )
539 if (anfds [fd].events) 1022 if (anfds [fd].events)
540 { 1023 {
541 fd_kill (EV_A_ fd); 1024 fd_kill (EV_A_ fd);
542 return; 1025 break;
543 } 1026 }
544} 1027}
545 1028
546/* usually called after fork if backend needs to re-arm all fds from scratch */ 1029/* usually called after fork if backend needs to re-arm all fds from scratch */
547static void noinline 1030static void noinline
548fd_rearm_all (EV_P) 1031fd_rearm_all (EV_P)
549{ 1032{
550 int fd; 1033 int fd;
551 1034
552 /* this should be highly optimised to not do anything but set a flag */
553 for (fd = 0; fd < anfdmax; ++fd) 1035 for (fd = 0; fd < anfdmax; ++fd)
554 if (anfds [fd].events) 1036 if (anfds [fd].events)
555 { 1037 {
556 anfds [fd].events = 0; 1038 anfds [fd].events = 0;
557 fd_change (EV_A_ fd); 1039 anfds [fd].emask = 0;
1040 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
558 } 1041 }
559} 1042}
560 1043
561/*****************************************************************************/ 1044/*****************************************************************************/
562 1045
563void inline_speed 1046/*
564upheap (WT *heap, int k) 1047 * the heap functions want a real array index. array index 0 uis guaranteed to not
565{ 1048 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
566 WT w = heap [k]; 1049 * the branching factor of the d-tree.
1050 */
567 1051
568 while (k && heap [k >> 1]->at > w->at) 1052/*
569 { 1053 * at the moment we allow libev the luxury of two heaps,
570 heap [k] = heap [k >> 1]; 1054 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
571 ((W)heap [k])->active = k + 1; 1055 * which is more cache-efficient.
572 k >>= 1; 1056 * the difference is about 5% with 50000+ watchers.
573 } 1057 */
1058#if EV_USE_4HEAP
574 1059
575 heap [k] = w; 1060#define DHEAP 4
576 ((W)heap [k])->active = k + 1; 1061#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1062#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1063#define UPHEAP_DONE(p,k) ((p) == (k))
577 1064
578} 1065/* away from the root */
579 1066inline_speed void
580void inline_speed
581downheap (WT *heap, int N, int k) 1067downheap (ANHE *heap, int N, int k)
582{ 1068{
583 WT w = heap [k]; 1069 ANHE he = heap [k];
1070 ANHE *E = heap + N + HEAP0;
584 1071
585 while (k < (N >> 1)) 1072 for (;;)
586 { 1073 {
587 int j = k << 1; 1074 ev_tstamp minat;
1075 ANHE *minpos;
1076 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
588 1077
589 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 1078 /* find minimum child */
1079 if (expect_true (pos + DHEAP - 1 < E))
590 ++j; 1080 {
591 1081 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
592 if (w->at <= heap [j]->at) 1082 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1083 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1084 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1085 }
1086 else if (pos < E)
1087 {
1088 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1089 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1090 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1091 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1092 }
1093 else
593 break; 1094 break;
594 1095
1096 if (ANHE_at (he) <= minat)
1097 break;
1098
1099 heap [k] = *minpos;
1100 ev_active (ANHE_w (*minpos)) = k;
1101
1102 k = minpos - heap;
1103 }
1104
1105 heap [k] = he;
1106 ev_active (ANHE_w (he)) = k;
1107}
1108
1109#else /* 4HEAP */
1110
1111#define HEAP0 1
1112#define HPARENT(k) ((k) >> 1)
1113#define UPHEAP_DONE(p,k) (!(p))
1114
1115/* away from the root */
1116inline_speed void
1117downheap (ANHE *heap, int N, int k)
1118{
1119 ANHE he = heap [k];
1120
1121 for (;;)
1122 {
1123 int c = k << 1;
1124
1125 if (c >= N + HEAP0)
1126 break;
1127
1128 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1129 ? 1 : 0;
1130
1131 if (ANHE_at (he) <= ANHE_at (heap [c]))
1132 break;
1133
595 heap [k] = heap [j]; 1134 heap [k] = heap [c];
596 ((W)heap [k])->active = k + 1; 1135 ev_active (ANHE_w (heap [k])) = k;
1136
597 k = j; 1137 k = c;
598 } 1138 }
599 1139
600 heap [k] = w; 1140 heap [k] = he;
601 ((W)heap [k])->active = k + 1; 1141 ev_active (ANHE_w (he)) = k;
602} 1142}
1143#endif
603 1144
604void inline_size 1145/* towards the root */
1146inline_speed void
1147upheap (ANHE *heap, int k)
1148{
1149 ANHE he = heap [k];
1150
1151 for (;;)
1152 {
1153 int p = HPARENT (k);
1154
1155 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1156 break;
1157
1158 heap [k] = heap [p];
1159 ev_active (ANHE_w (heap [k])) = k;
1160 k = p;
1161 }
1162
1163 heap [k] = he;
1164 ev_active (ANHE_w (he)) = k;
1165}
1166
1167/* move an element suitably so it is in a correct place */
1168inline_size void
605adjustheap (WT *heap, int N, int k) 1169adjustheap (ANHE *heap, int N, int k)
606{ 1170{
1171 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
607 upheap (heap, k); 1172 upheap (heap, k);
1173 else
608 downheap (heap, N, k); 1174 downheap (heap, N, k);
1175}
1176
1177/* rebuild the heap: this function is used only once and executed rarely */
1178inline_size void
1179reheap (ANHE *heap, int N)
1180{
1181 int i;
1182
1183 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1184 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1185 for (i = 0; i < N; ++i)
1186 upheap (heap, i + HEAP0);
609} 1187}
610 1188
611/*****************************************************************************/ 1189/*****************************************************************************/
612 1190
1191/* associate signal watchers to a signal signal */
613typedef struct 1192typedef struct
614{ 1193{
1194 EV_ATOMIC_T pending;
1195#if EV_MULTIPLICITY
1196 EV_P;
1197#endif
615 WL head; 1198 WL head;
616 sig_atomic_t volatile gotsig;
617} ANSIG; 1199} ANSIG;
618 1200
619static ANSIG *signals; 1201static ANSIG signals [EV_NSIG - 1];
620static int signalmax;
621 1202
622static int sigpipe [2]; 1203/*****************************************************************************/
623static sig_atomic_t volatile gotsig;
624static ev_io sigev;
625 1204
626void inline_size 1205/* used to prepare libev internal fd's */
627signals_init (ANSIG *base, int count) 1206/* this is not fork-safe */
628{ 1207inline_speed void
629 while (count--)
630 {
631 base->head = 0;
632 base->gotsig = 0;
633
634 ++base;
635 }
636}
637
638static void
639sighandler (int signum)
640{
641#if _WIN32
642 signal (signum, sighandler);
643#endif
644
645 signals [signum - 1].gotsig = 1;
646
647 if (!gotsig)
648 {
649 int old_errno = errno;
650 gotsig = 1;
651 write (sigpipe [1], &signum, 1);
652 errno = old_errno;
653 }
654}
655
656void noinline
657ev_feed_signal_event (EV_P_ int signum)
658{
659 WL w;
660
661#if EV_MULTIPLICITY
662 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
663#endif
664
665 --signum;
666
667 if (signum < 0 || signum >= signalmax)
668 return;
669
670 signals [signum].gotsig = 0;
671
672 for (w = signals [signum].head; w; w = w->next)
673 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
674}
675
676static void
677sigcb (EV_P_ ev_io *iow, int revents)
678{
679 int signum;
680
681 read (sigpipe [0], &revents, 1);
682 gotsig = 0;
683
684 for (signum = signalmax; signum--; )
685 if (signals [signum].gotsig)
686 ev_feed_signal_event (EV_A_ signum + 1);
687}
688
689void inline_size
690fd_intern (int fd) 1208fd_intern (int fd)
691{ 1209{
692#ifdef _WIN32 1210#ifdef _WIN32
693 int arg = 1; 1211 unsigned long arg = 1;
694 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1212 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
695#else 1213#else
696 fcntl (fd, F_SETFD, FD_CLOEXEC); 1214 fcntl (fd, F_SETFD, FD_CLOEXEC);
697 fcntl (fd, F_SETFL, O_NONBLOCK); 1215 fcntl (fd, F_SETFL, O_NONBLOCK);
698#endif 1216#endif
699} 1217}
700 1218
701static void noinline 1219static void noinline
702siginit (EV_P) 1220evpipe_init (EV_P)
703{ 1221{
1222 if (!ev_is_active (&pipe_w))
1223 {
1224#if EV_USE_EVENTFD
1225 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1226 if (evfd < 0 && errno == EINVAL)
1227 evfd = eventfd (0, 0);
1228
1229 if (evfd >= 0)
1230 {
1231 evpipe [0] = -1;
1232 fd_intern (evfd); /* doing it twice doesn't hurt */
1233 ev_io_set (&pipe_w, evfd, EV_READ);
1234 }
1235 else
1236#endif
1237 {
1238 while (pipe (evpipe))
1239 ev_syserr ("(libev) error creating signal/async pipe");
1240
704 fd_intern (sigpipe [0]); 1241 fd_intern (evpipe [0]);
705 fd_intern (sigpipe [1]); 1242 fd_intern (evpipe [1]);
1243 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1244 }
706 1245
707 ev_io_set (&sigev, sigpipe [0], EV_READ);
708 ev_io_start (EV_A_ &sigev); 1246 ev_io_start (EV_A_ &pipe_w);
709 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1247 ev_unref (EV_A); /* watcher should not keep loop alive */
1248 }
1249}
1250
1251inline_size void
1252evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1253{
1254 if (!*flag)
1255 {
1256 int old_errno = errno; /* save errno because write might clobber it */
1257
1258 *flag = 1;
1259
1260#if EV_USE_EVENTFD
1261 if (evfd >= 0)
1262 {
1263 uint64_t counter = 1;
1264 write (evfd, &counter, sizeof (uint64_t));
1265 }
1266 else
1267#endif
1268 write (evpipe [1], &old_errno, 1);
1269
1270 errno = old_errno;
1271 }
1272}
1273
1274/* called whenever the libev signal pipe */
1275/* got some events (signal, async) */
1276static void
1277pipecb (EV_P_ ev_io *iow, int revents)
1278{
1279 int i;
1280
1281#if EV_USE_EVENTFD
1282 if (evfd >= 0)
1283 {
1284 uint64_t counter;
1285 read (evfd, &counter, sizeof (uint64_t));
1286 }
1287 else
1288#endif
1289 {
1290 char dummy;
1291 read (evpipe [0], &dummy, 1);
1292 }
1293
1294 if (sig_pending)
1295 {
1296 sig_pending = 0;
1297
1298 for (i = EV_NSIG - 1; i--; )
1299 if (expect_false (signals [i].pending))
1300 ev_feed_signal_event (EV_A_ i + 1);
1301 }
1302
1303#if EV_ASYNC_ENABLE
1304 if (async_pending)
1305 {
1306 async_pending = 0;
1307
1308 for (i = asynccnt; i--; )
1309 if (asyncs [i]->sent)
1310 {
1311 asyncs [i]->sent = 0;
1312 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1313 }
1314 }
1315#endif
710} 1316}
711 1317
712/*****************************************************************************/ 1318/*****************************************************************************/
713 1319
1320static void
1321ev_sighandler (int signum)
1322{
1323#if EV_MULTIPLICITY
1324 EV_P = signals [signum - 1].loop;
1325#endif
1326
1327#ifdef _WIN32
1328 signal (signum, ev_sighandler);
1329#endif
1330
1331 signals [signum - 1].pending = 1;
1332 evpipe_write (EV_A_ &sig_pending);
1333}
1334
1335void noinline
1336ev_feed_signal_event (EV_P_ int signum)
1337{
1338 WL w;
1339
1340 if (expect_false (signum <= 0 || signum > EV_NSIG))
1341 return;
1342
1343 --signum;
1344
1345#if EV_MULTIPLICITY
1346 /* it is permissible to try to feed a signal to the wrong loop */
1347 /* or, likely more useful, feeding a signal nobody is waiting for */
1348
1349 if (expect_false (signals [signum].loop != EV_A))
1350 return;
1351#endif
1352
1353 signals [signum].pending = 0;
1354
1355 for (w = signals [signum].head; w; w = w->next)
1356 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1357}
1358
1359#if EV_USE_SIGNALFD
1360static void
1361sigfdcb (EV_P_ ev_io *iow, int revents)
1362{
1363 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1364
1365 for (;;)
1366 {
1367 ssize_t res = read (sigfd, si, sizeof (si));
1368
1369 /* not ISO-C, as res might be -1, but works with SuS */
1370 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1371 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1372
1373 if (res < (ssize_t)sizeof (si))
1374 break;
1375 }
1376}
1377#endif
1378
1379/*****************************************************************************/
1380
714static ev_child *childs [PID_HASHSIZE]; 1381static WL childs [EV_PID_HASHSIZE];
715 1382
716#ifndef _WIN32 1383#ifndef _WIN32
717 1384
718static ev_signal childev; 1385static ev_signal childev;
719 1386
720void inline_speed 1387#ifndef WIFCONTINUED
1388# define WIFCONTINUED(status) 0
1389#endif
1390
1391/* handle a single child status event */
1392inline_speed void
721child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 1393child_reap (EV_P_ int chain, int pid, int status)
722{ 1394{
723 ev_child *w; 1395 ev_child *w;
1396 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
724 1397
725 for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 1398 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1399 {
726 if (w->pid == pid || !w->pid) 1400 if ((w->pid == pid || !w->pid)
1401 && (!traced || (w->flags & 1)))
727 { 1402 {
728 ev_priority (w) = ev_priority (sw); /* need to do it *now* */ 1403 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
729 w->rpid = pid; 1404 w->rpid = pid;
730 w->rstatus = status; 1405 w->rstatus = status;
731 ev_feed_event (EV_A_ (W)w, EV_CHILD); 1406 ev_feed_event (EV_A_ (W)w, EV_CHILD);
732 } 1407 }
1408 }
733} 1409}
734 1410
735#ifndef WCONTINUED 1411#ifndef WCONTINUED
736# define WCONTINUED 0 1412# define WCONTINUED 0
737#endif 1413#endif
738 1414
1415/* called on sigchld etc., calls waitpid */
739static void 1416static void
740childcb (EV_P_ ev_signal *sw, int revents) 1417childcb (EV_P_ ev_signal *sw, int revents)
741{ 1418{
742 int pid, status; 1419 int pid, status;
743 1420
… …
746 if (!WCONTINUED 1423 if (!WCONTINUED
747 || errno != EINVAL 1424 || errno != EINVAL
748 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 1425 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
749 return; 1426 return;
750 1427
751 /* make sure we are called again until all childs have been reaped */ 1428 /* make sure we are called again until all children have been reaped */
752 /* we need to do it this way so that the callback gets called before we continue */ 1429 /* we need to do it this way so that the callback gets called before we continue */
753 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1430 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
754 1431
755 child_reap (EV_A_ sw, pid, pid, status); 1432 child_reap (EV_A_ pid, pid, status);
1433 if (EV_PID_HASHSIZE > 1)
756 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1434 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
757} 1435}
758 1436
759#endif 1437#endif
760 1438
761/*****************************************************************************/ 1439/*****************************************************************************/
… …
823 /* kqueue is borked on everything but netbsd apparently */ 1501 /* kqueue is borked on everything but netbsd apparently */
824 /* it usually doesn't work correctly on anything but sockets and pipes */ 1502 /* it usually doesn't work correctly on anything but sockets and pipes */
825 flags &= ~EVBACKEND_KQUEUE; 1503 flags &= ~EVBACKEND_KQUEUE;
826#endif 1504#endif
827#ifdef __APPLE__ 1505#ifdef __APPLE__
828 // flags &= ~EVBACKEND_KQUEUE; for documentation 1506 /* only select works correctly on that "unix-certified" platform */
829 flags &= ~EVBACKEND_POLL; 1507 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1508 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
830#endif 1509#endif
831 1510
832 return flags; 1511 return flags;
833} 1512}
834 1513
835unsigned int 1514unsigned int
836ev_embeddable_backends (void) 1515ev_embeddable_backends (void)
837{ 1516{
838 return EVBACKEND_EPOLL 1517 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
839 | EVBACKEND_KQUEUE 1518
840 | EVBACKEND_PORT; 1519 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1520 /* please fix it and tell me how to detect the fix */
1521 flags &= ~EVBACKEND_EPOLL;
1522
1523 return flags;
841} 1524}
842 1525
843unsigned int 1526unsigned int
844ev_backend (EV_P) 1527ev_backend (EV_P)
845{ 1528{
846 return backend; 1529 return backend;
847} 1530}
848 1531
849static void 1532#if EV_MINIMAL < 2
1533unsigned int
1534ev_loop_count (EV_P)
1535{
1536 return loop_count;
1537}
1538
1539unsigned int
1540ev_loop_depth (EV_P)
1541{
1542 return loop_depth;
1543}
1544
1545void
1546ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1547{
1548 io_blocktime = interval;
1549}
1550
1551void
1552ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1553{
1554 timeout_blocktime = interval;
1555}
1556
1557void
1558ev_set_userdata (EV_P_ void *data)
1559{
1560 userdata = data;
1561}
1562
1563void *
1564ev_userdata (EV_P)
1565{
1566 return userdata;
1567}
1568
1569void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1570{
1571 invoke_cb = invoke_pending_cb;
1572}
1573
1574void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1575{
1576 release_cb = release;
1577 acquire_cb = acquire;
1578}
1579#endif
1580
1581/* initialise a loop structure, must be zero-initialised */
1582static void noinline
850loop_init (EV_P_ unsigned int flags) 1583loop_init (EV_P_ unsigned int flags)
851{ 1584{
852 if (!backend) 1585 if (!backend)
853 { 1586 {
1587#if EV_USE_REALTIME
1588 if (!have_realtime)
1589 {
1590 struct timespec ts;
1591
1592 if (!clock_gettime (CLOCK_REALTIME, &ts))
1593 have_realtime = 1;
1594 }
1595#endif
1596
854#if EV_USE_MONOTONIC 1597#if EV_USE_MONOTONIC
1598 if (!have_monotonic)
855 { 1599 {
856 struct timespec ts; 1600 struct timespec ts;
1601
857 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1602 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
858 have_monotonic = 1; 1603 have_monotonic = 1;
859 } 1604 }
860#endif 1605#endif
861 1606
862 ev_rt_now = ev_time (); 1607 /* pid check not overridable via env */
863 mn_now = get_clock (); 1608#ifndef _WIN32
864 now_floor = mn_now; 1609 if (flags & EVFLAG_FORKCHECK)
865 rtmn_diff = ev_rt_now - mn_now; 1610 curpid = getpid ();
1611#endif
866 1612
867 if (!(flags & EVFLAG_NOENV) 1613 if (!(flags & EVFLAG_NOENV)
868 && !enable_secure () 1614 && !enable_secure ()
869 && getenv ("LIBEV_FLAGS")) 1615 && getenv ("LIBEV_FLAGS"))
870 flags = atoi (getenv ("LIBEV_FLAGS")); 1616 flags = atoi (getenv ("LIBEV_FLAGS"));
871 1617
1618 ev_rt_now = ev_time ();
1619 mn_now = get_clock ();
1620 now_floor = mn_now;
1621 rtmn_diff = ev_rt_now - mn_now;
1622#if EV_MINIMAL < 2
1623 invoke_cb = ev_invoke_pending;
1624#endif
1625
1626 io_blocktime = 0.;
1627 timeout_blocktime = 0.;
1628 backend = 0;
1629 backend_fd = -1;
1630 sig_pending = 0;
1631#if EV_ASYNC_ENABLE
1632 async_pending = 0;
1633#endif
1634#if EV_USE_INOTIFY
1635 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1636#endif
1637#if EV_USE_SIGNALFD
1638 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1639#endif
1640
872 if (!(flags & 0x0000ffffUL)) 1641 if (!(flags & 0x0000ffffU))
873 flags |= ev_recommended_backends (); 1642 flags |= ev_recommended_backends ();
874 1643
875 backend = 0;
876#if EV_USE_PORT 1644#if EV_USE_PORT
877 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1645 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
878#endif 1646#endif
879#if EV_USE_KQUEUE 1647#if EV_USE_KQUEUE
880 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1648 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
887#endif 1655#endif
888#if EV_USE_SELECT 1656#if EV_USE_SELECT
889 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1657 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
890#endif 1658#endif
891 1659
1660 ev_prepare_init (&pending_w, pendingcb);
1661
892 ev_init (&sigev, sigcb); 1662 ev_init (&pipe_w, pipecb);
893 ev_set_priority (&sigev, EV_MAXPRI); 1663 ev_set_priority (&pipe_w, EV_MAXPRI);
894 } 1664 }
895} 1665}
896 1666
897static void 1667/* free up a loop structure */
1668static void noinline
898loop_destroy (EV_P) 1669loop_destroy (EV_P)
899{ 1670{
900 int i; 1671 int i;
1672
1673 if (ev_is_active (&pipe_w))
1674 {
1675 /*ev_ref (EV_A);*/
1676 /*ev_io_stop (EV_A_ &pipe_w);*/
1677
1678#if EV_USE_EVENTFD
1679 if (evfd >= 0)
1680 close (evfd);
1681#endif
1682
1683 if (evpipe [0] >= 0)
1684 {
1685 EV_WIN32_CLOSE_FD (evpipe [0]);
1686 EV_WIN32_CLOSE_FD (evpipe [1]);
1687 }
1688 }
1689
1690#if EV_USE_SIGNALFD
1691 if (ev_is_active (&sigfd_w))
1692 close (sigfd);
1693#endif
1694
1695#if EV_USE_INOTIFY
1696 if (fs_fd >= 0)
1697 close (fs_fd);
1698#endif
1699
1700 if (backend_fd >= 0)
1701 close (backend_fd);
901 1702
902#if EV_USE_PORT 1703#if EV_USE_PORT
903 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1704 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
904#endif 1705#endif
905#if EV_USE_KQUEUE 1706#if EV_USE_KQUEUE
… …
914#if EV_USE_SELECT 1715#if EV_USE_SELECT
915 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 1716 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
916#endif 1717#endif
917 1718
918 for (i = NUMPRI; i--; ) 1719 for (i = NUMPRI; i--; )
1720 {
919 array_free (pending, [i]); 1721 array_free (pending, [i]);
1722#if EV_IDLE_ENABLE
1723 array_free (idle, [i]);
1724#endif
1725 }
1726
1727 ev_free (anfds); anfds = 0; anfdmax = 0;
920 1728
921 /* have to use the microsoft-never-gets-it-right macro */ 1729 /* have to use the microsoft-never-gets-it-right macro */
1730 array_free (rfeed, EMPTY);
922 array_free (fdchange, EMPTY0); 1731 array_free (fdchange, EMPTY);
923 array_free (timer, EMPTY0); 1732 array_free (timer, EMPTY);
924#if EV_PERIODIC_ENABLE 1733#if EV_PERIODIC_ENABLE
925 array_free (periodic, EMPTY0); 1734 array_free (periodic, EMPTY);
926#endif 1735#endif
1736#if EV_FORK_ENABLE
927 array_free (idle, EMPTY0); 1737 array_free (fork, EMPTY);
1738#endif
928 array_free (prepare, EMPTY0); 1739 array_free (prepare, EMPTY);
929 array_free (check, EMPTY0); 1740 array_free (check, EMPTY);
1741#if EV_ASYNC_ENABLE
1742 array_free (async, EMPTY);
1743#endif
930 1744
931 backend = 0; 1745 backend = 0;
932} 1746}
933 1747
934static void 1748#if EV_USE_INOTIFY
1749inline_size void infy_fork (EV_P);
1750#endif
1751
1752inline_size void
935loop_fork (EV_P) 1753loop_fork (EV_P)
936{ 1754{
937#if EV_USE_PORT 1755#if EV_USE_PORT
938 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 1756 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
939#endif 1757#endif
… …
941 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 1759 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
942#endif 1760#endif
943#if EV_USE_EPOLL 1761#if EV_USE_EPOLL
944 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 1762 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
945#endif 1763#endif
1764#if EV_USE_INOTIFY
1765 infy_fork (EV_A);
1766#endif
946 1767
947 if (ev_is_active (&sigev)) 1768 if (ev_is_active (&pipe_w))
948 { 1769 {
949 /* default loop */ 1770 /* this "locks" the handlers against writing to the pipe */
1771 /* while we modify the fd vars */
1772 sig_pending = 1;
1773#if EV_ASYNC_ENABLE
1774 async_pending = 1;
1775#endif
950 1776
951 ev_ref (EV_A); 1777 ev_ref (EV_A);
952 ev_io_stop (EV_A_ &sigev); 1778 ev_io_stop (EV_A_ &pipe_w);
953 close (sigpipe [0]);
954 close (sigpipe [1]);
955 1779
956 while (pipe (sigpipe)) 1780#if EV_USE_EVENTFD
957 syserr ("(libev) error creating pipe"); 1781 if (evfd >= 0)
1782 close (evfd);
1783#endif
958 1784
1785 if (evpipe [0] >= 0)
1786 {
1787 EV_WIN32_CLOSE_FD (evpipe [0]);
1788 EV_WIN32_CLOSE_FD (evpipe [1]);
1789 }
1790
959 siginit (EV_A); 1791 evpipe_init (EV_A);
1792 /* now iterate over everything, in case we missed something */
1793 pipecb (EV_A_ &pipe_w, EV_READ);
960 } 1794 }
961 1795
962 postfork = 0; 1796 postfork = 0;
963} 1797}
964 1798
965#if EV_MULTIPLICITY 1799#if EV_MULTIPLICITY
1800
966struct ev_loop * 1801struct ev_loop *
967ev_loop_new (unsigned int flags) 1802ev_loop_new (unsigned int flags)
968{ 1803{
969 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 1804 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
970 1805
971 memset (loop, 0, sizeof (struct ev_loop)); 1806 memset (EV_A, 0, sizeof (struct ev_loop));
972
973 loop_init (EV_A_ flags); 1807 loop_init (EV_A_ flags);
974 1808
975 if (ev_backend (EV_A)) 1809 if (ev_backend (EV_A))
976 return loop; 1810 return EV_A;
977 1811
978 return 0; 1812 return 0;
979} 1813}
980 1814
981void 1815void
… …
986} 1820}
987 1821
988void 1822void
989ev_loop_fork (EV_P) 1823ev_loop_fork (EV_P)
990{ 1824{
991 postfork = 1; 1825 postfork = 1; /* must be in line with ev_default_fork */
992} 1826}
1827#endif /* multiplicity */
993 1828
1829#if EV_VERIFY
1830static void noinline
1831verify_watcher (EV_P_ W w)
1832{
1833 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1834
1835 if (w->pending)
1836 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1837}
1838
1839static void noinline
1840verify_heap (EV_P_ ANHE *heap, int N)
1841{
1842 int i;
1843
1844 for (i = HEAP0; i < N + HEAP0; ++i)
1845 {
1846 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1847 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1848 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1849
1850 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1851 }
1852}
1853
1854static void noinline
1855array_verify (EV_P_ W *ws, int cnt)
1856{
1857 while (cnt--)
1858 {
1859 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1860 verify_watcher (EV_A_ ws [cnt]);
1861 }
1862}
1863#endif
1864
1865#if EV_MINIMAL < 2
1866void
1867ev_loop_verify (EV_P)
1868{
1869#if EV_VERIFY
1870 int i;
1871 WL w;
1872
1873 assert (activecnt >= -1);
1874
1875 assert (fdchangemax >= fdchangecnt);
1876 for (i = 0; i < fdchangecnt; ++i)
1877 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1878
1879 assert (anfdmax >= 0);
1880 for (i = 0; i < anfdmax; ++i)
1881 for (w = anfds [i].head; w; w = w->next)
1882 {
1883 verify_watcher (EV_A_ (W)w);
1884 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1885 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1886 }
1887
1888 assert (timermax >= timercnt);
1889 verify_heap (EV_A_ timers, timercnt);
1890
1891#if EV_PERIODIC_ENABLE
1892 assert (periodicmax >= periodiccnt);
1893 verify_heap (EV_A_ periodics, periodiccnt);
1894#endif
1895
1896 for (i = NUMPRI; i--; )
1897 {
1898 assert (pendingmax [i] >= pendingcnt [i]);
1899#if EV_IDLE_ENABLE
1900 assert (idleall >= 0);
1901 assert (idlemax [i] >= idlecnt [i]);
1902 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1903#endif
1904 }
1905
1906#if EV_FORK_ENABLE
1907 assert (forkmax >= forkcnt);
1908 array_verify (EV_A_ (W *)forks, forkcnt);
1909#endif
1910
1911#if EV_ASYNC_ENABLE
1912 assert (asyncmax >= asynccnt);
1913 array_verify (EV_A_ (W *)asyncs, asynccnt);
1914#endif
1915
1916 assert (preparemax >= preparecnt);
1917 array_verify (EV_A_ (W *)prepares, preparecnt);
1918
1919 assert (checkmax >= checkcnt);
1920 array_verify (EV_A_ (W *)checks, checkcnt);
1921
1922# if 0
1923 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1924 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1925# endif
1926#endif
1927}
994#endif 1928#endif
995 1929
996#if EV_MULTIPLICITY 1930#if EV_MULTIPLICITY
997struct ev_loop * 1931struct ev_loop *
998ev_default_loop_init (unsigned int flags) 1932ev_default_loop_init (unsigned int flags)
999#else 1933#else
1000int 1934int
1001ev_default_loop (unsigned int flags) 1935ev_default_loop (unsigned int flags)
1002#endif 1936#endif
1003{ 1937{
1004 if (sigpipe [0] == sigpipe [1])
1005 if (pipe (sigpipe))
1006 return 0;
1007
1008 if (!ev_default_loop_ptr) 1938 if (!ev_default_loop_ptr)
1009 { 1939 {
1010#if EV_MULTIPLICITY 1940#if EV_MULTIPLICITY
1011 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1941 EV_P = ev_default_loop_ptr = &default_loop_struct;
1012#else 1942#else
1013 ev_default_loop_ptr = 1; 1943 ev_default_loop_ptr = 1;
1014#endif 1944#endif
1015 1945
1016 loop_init (EV_A_ flags); 1946 loop_init (EV_A_ flags);
1017 1947
1018 if (ev_backend (EV_A)) 1948 if (ev_backend (EV_A))
1019 { 1949 {
1020 siginit (EV_A);
1021
1022#ifndef _WIN32 1950#ifndef _WIN32
1023 ev_signal_init (&childev, childcb, SIGCHLD); 1951 ev_signal_init (&childev, childcb, SIGCHLD);
1024 ev_set_priority (&childev, EV_MAXPRI); 1952 ev_set_priority (&childev, EV_MAXPRI);
1025 ev_signal_start (EV_A_ &childev); 1953 ev_signal_start (EV_A_ &childev);
1026 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1954 ev_unref (EV_A); /* child watcher should not keep loop alive */
… …
1035 1963
1036void 1964void
1037ev_default_destroy (void) 1965ev_default_destroy (void)
1038{ 1966{
1039#if EV_MULTIPLICITY 1967#if EV_MULTIPLICITY
1040 struct ev_loop *loop = ev_default_loop_ptr; 1968 EV_P = ev_default_loop_ptr;
1041#endif 1969#endif
1970
1971 ev_default_loop_ptr = 0;
1042 1972
1043#ifndef _WIN32 1973#ifndef _WIN32
1044 ev_ref (EV_A); /* child watcher */ 1974 ev_ref (EV_A); /* child watcher */
1045 ev_signal_stop (EV_A_ &childev); 1975 ev_signal_stop (EV_A_ &childev);
1046#endif 1976#endif
1047 1977
1048 ev_ref (EV_A); /* signal watcher */
1049 ev_io_stop (EV_A_ &sigev);
1050
1051 close (sigpipe [0]); sigpipe [0] = 0;
1052 close (sigpipe [1]); sigpipe [1] = 0;
1053
1054 loop_destroy (EV_A); 1978 loop_destroy (EV_A);
1055} 1979}
1056 1980
1057void 1981void
1058ev_default_fork (void) 1982ev_default_fork (void)
1059{ 1983{
1060#if EV_MULTIPLICITY 1984#if EV_MULTIPLICITY
1061 struct ev_loop *loop = ev_default_loop_ptr; 1985 EV_P = ev_default_loop_ptr;
1062#endif 1986#endif
1063 1987
1064 if (backend) 1988 postfork = 1; /* must be in line with ev_loop_fork */
1065 postfork = 1;
1066} 1989}
1067 1990
1068/*****************************************************************************/ 1991/*****************************************************************************/
1069 1992
1070int inline_size 1993void
1071any_pending (EV_P) 1994ev_invoke (EV_P_ void *w, int revents)
1995{
1996 EV_CB_INVOKE ((W)w, revents);
1997}
1998
1999unsigned int
2000ev_pending_count (EV_P)
1072{ 2001{
1073 int pri; 2002 int pri;
2003 unsigned int count = 0;
1074 2004
1075 for (pri = NUMPRI; pri--; ) 2005 for (pri = NUMPRI; pri--; )
1076 if (pendingcnt [pri]) 2006 count += pendingcnt [pri];
1077 return 1;
1078 2007
1079 return 0; 2008 return count;
1080} 2009}
1081 2010
1082void inline_speed 2011void noinline
1083call_pending (EV_P) 2012ev_invoke_pending (EV_P)
1084{ 2013{
1085 int pri; 2014 int pri;
1086 2015
1087 for (pri = NUMPRI; pri--; ) 2016 for (pri = NUMPRI; pri--; )
1088 while (pendingcnt [pri]) 2017 while (pendingcnt [pri])
1089 { 2018 {
1090 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2019 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1091 2020
1092 if (expect_true (p->w))
1093 {
1094 assert (("non-pending watcher on pending list", p->w->pending)); 2021 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2022 /* ^ this is no longer true, as pending_w could be here */
1095 2023
1096 p->w->pending = 0; 2024 p->w->pending = 0;
1097 EV_CB_INVOKE (p->w, p->events); 2025 EV_CB_INVOKE (p->w, p->events);
1098 } 2026 EV_FREQUENT_CHECK;
1099 } 2027 }
1100} 2028}
1101 2029
1102void inline_size 2030#if EV_IDLE_ENABLE
2031/* make idle watchers pending. this handles the "call-idle */
2032/* only when higher priorities are idle" logic */
2033inline_size void
2034idle_reify (EV_P)
2035{
2036 if (expect_false (idleall))
2037 {
2038 int pri;
2039
2040 for (pri = NUMPRI; pri--; )
2041 {
2042 if (pendingcnt [pri])
2043 break;
2044
2045 if (idlecnt [pri])
2046 {
2047 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2048 break;
2049 }
2050 }
2051 }
2052}
2053#endif
2054
2055/* make timers pending */
2056inline_size void
1103timers_reify (EV_P) 2057timers_reify (EV_P)
1104{ 2058{
2059 EV_FREQUENT_CHECK;
2060
1105 while (timercnt && ((WT)timers [0])->at <= mn_now) 2061 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1106 { 2062 {
1107 ev_timer *w = timers [0]; 2063 do
1108
1109 assert (("inactive timer on timer heap detected", ev_is_active (w)));
1110
1111 /* first reschedule or stop timer */
1112 if (w->repeat)
1113 { 2064 {
2065 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2066
2067 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2068
2069 /* first reschedule or stop timer */
2070 if (w->repeat)
2071 {
2072 ev_at (w) += w->repeat;
2073 if (ev_at (w) < mn_now)
2074 ev_at (w) = mn_now;
2075
1114 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2076 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1115 2077
1116 ((WT)w)->at += w->repeat; 2078 ANHE_at_cache (timers [HEAP0]);
1117 if (((WT)w)->at < mn_now)
1118 ((WT)w)->at = mn_now;
1119
1120 downheap ((WT *)timers, timercnt, 0); 2079 downheap (timers, timercnt, HEAP0);
2080 }
2081 else
2082 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2083
2084 EV_FREQUENT_CHECK;
2085 feed_reverse (EV_A_ (W)w);
1121 } 2086 }
1122 else 2087 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1123 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1124 2088
1125 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2089 feed_reverse_done (EV_A_ EV_TIMEOUT);
1126 } 2090 }
1127} 2091}
1128 2092
1129#if EV_PERIODIC_ENABLE 2093#if EV_PERIODIC_ENABLE
1130void inline_size 2094/* make periodics pending */
2095inline_size void
1131periodics_reify (EV_P) 2096periodics_reify (EV_P)
1132{ 2097{
2098 EV_FREQUENT_CHECK;
2099
1133 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 2100 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1134 { 2101 {
1135 ev_periodic *w = periodics [0]; 2102 int feed_count = 0;
1136 2103
1137 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 2104 do
1138
1139 /* first reschedule or stop timer */
1140 if (w->reschedule_cb)
1141 { 2105 {
2106 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2107
2108 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2109
2110 /* first reschedule or stop timer */
2111 if (w->reschedule_cb)
2112 {
1142 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 2113 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2114
1143 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 2115 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2116
2117 ANHE_at_cache (periodics [HEAP0]);
1144 downheap ((WT *)periodics, periodiccnt, 0); 2118 downheap (periodics, periodiccnt, HEAP0);
2119 }
2120 else if (w->interval)
2121 {
2122 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2123 /* if next trigger time is not sufficiently in the future, put it there */
2124 /* this might happen because of floating point inexactness */
2125 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2126 {
2127 ev_at (w) += w->interval;
2128
2129 /* if interval is unreasonably low we might still have a time in the past */
2130 /* so correct this. this will make the periodic very inexact, but the user */
2131 /* has effectively asked to get triggered more often than possible */
2132 if (ev_at (w) < ev_rt_now)
2133 ev_at (w) = ev_rt_now;
2134 }
2135
2136 ANHE_at_cache (periodics [HEAP0]);
2137 downheap (periodics, periodiccnt, HEAP0);
2138 }
2139 else
2140 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2141
2142 EV_FREQUENT_CHECK;
2143 feed_reverse (EV_A_ (W)w);
1145 } 2144 }
1146 else if (w->interval) 2145 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1147 {
1148 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1149 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1150 downheap ((WT *)periodics, periodiccnt, 0);
1151 }
1152 else
1153 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1154 2146
1155 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 2147 feed_reverse_done (EV_A_ EV_PERIODIC);
1156 } 2148 }
1157} 2149}
1158 2150
2151/* simply recalculate all periodics */
2152/* TODO: maybe ensure that at leats one event happens when jumping forward? */
1159static void noinline 2153static void noinline
1160periodics_reschedule (EV_P) 2154periodics_reschedule (EV_P)
1161{ 2155{
1162 int i; 2156 int i;
1163 2157
1164 /* adjust periodics after time jump */ 2158 /* adjust periodics after time jump */
1165 for (i = 0; i < periodiccnt; ++i) 2159 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
1166 { 2160 {
1167 ev_periodic *w = periodics [i]; 2161 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1168 2162
1169 if (w->reschedule_cb) 2163 if (w->reschedule_cb)
1170 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2164 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1171 else if (w->interval) 2165 else if (w->interval)
1172 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2166 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2167
2168 ANHE_at_cache (periodics [i]);
2169 }
2170
2171 reheap (periodics, periodiccnt);
2172}
2173#endif
2174
2175/* adjust all timers by a given offset */
2176static void noinline
2177timers_reschedule (EV_P_ ev_tstamp adjust)
2178{
2179 int i;
2180
2181 for (i = 0; i < timercnt; ++i)
1173 } 2182 {
1174 2183 ANHE *he = timers + i + HEAP0;
1175 /* now rebuild the heap */ 2184 ANHE_w (*he)->at += adjust;
1176 for (i = periodiccnt >> 1; i--; ) 2185 ANHE_at_cache (*he);
1177 downheap ((WT *)periodics, periodiccnt, i); 2186 }
1178} 2187}
1179#endif
1180 2188
1181int inline_size 2189/* fetch new monotonic and realtime times from the kernel */
1182time_update_monotonic (EV_P) 2190/* also detect if there was a timejump, and act accordingly */
2191inline_speed void
2192time_update (EV_P_ ev_tstamp max_block)
1183{ 2193{
2194#if EV_USE_MONOTONIC
2195 if (expect_true (have_monotonic))
2196 {
2197 int i;
2198 ev_tstamp odiff = rtmn_diff;
2199
1184 mn_now = get_clock (); 2200 mn_now = get_clock ();
1185 2201
2202 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2203 /* interpolate in the meantime */
1186 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 2204 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1187 { 2205 {
1188 ev_rt_now = rtmn_diff + mn_now; 2206 ev_rt_now = rtmn_diff + mn_now;
1189 return 0; 2207 return;
1190 } 2208 }
1191 else 2209
1192 {
1193 now_floor = mn_now; 2210 now_floor = mn_now;
1194 ev_rt_now = ev_time (); 2211 ev_rt_now = ev_time ();
1195 return 1;
1196 }
1197}
1198 2212
1199void inline_size 2213 /* loop a few times, before making important decisions.
1200time_update (EV_P) 2214 * on the choice of "4": one iteration isn't enough,
1201{ 2215 * in case we get preempted during the calls to
1202 int i; 2216 * ev_time and get_clock. a second call is almost guaranteed
1203 2217 * to succeed in that case, though. and looping a few more times
1204#if EV_USE_MONOTONIC 2218 * doesn't hurt either as we only do this on time-jumps or
1205 if (expect_true (have_monotonic)) 2219 * in the unlikely event of having been preempted here.
1206 { 2220 */
1207 if (time_update_monotonic (EV_A)) 2221 for (i = 4; --i; )
1208 { 2222 {
1209 ev_tstamp odiff = rtmn_diff;
1210
1211 /* loop a few times, before making important decisions.
1212 * on the choice of "4": one iteration isn't enough,
1213 * in case we get preempted during the calls to
1214 * ev_time and get_clock. a second call is almost guarenteed
1215 * to succeed in that case, though. and looping a few more times
1216 * doesn't hurt either as we only do this on time-jumps or
1217 * in the unlikely event of getting preempted here.
1218 */
1219 for (i = 4; --i; )
1220 {
1221 rtmn_diff = ev_rt_now - mn_now; 2223 rtmn_diff = ev_rt_now - mn_now;
1222 2224
1223 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2225 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1224 return; /* all is well */ 2226 return; /* all is well */
1225 2227
1226 ev_rt_now = ev_time (); 2228 ev_rt_now = ev_time ();
1227 mn_now = get_clock (); 2229 mn_now = get_clock ();
1228 now_floor = mn_now; 2230 now_floor = mn_now;
1229 } 2231 }
1230 2232
2233 /* no timer adjustment, as the monotonic clock doesn't jump */
2234 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1231# if EV_PERIODIC_ENABLE 2235# if EV_PERIODIC_ENABLE
1232 periodics_reschedule (EV_A); 2236 periodics_reschedule (EV_A);
1233# endif 2237# endif
1234 /* no timer adjustment, as the monotonic clock doesn't jump */
1235 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1236 }
1237 } 2238 }
1238 else 2239 else
1239#endif 2240#endif
1240 { 2241 {
1241 ev_rt_now = ev_time (); 2242 ev_rt_now = ev_time ();
1242 2243
1243 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 2244 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1244 { 2245 {
2246 /* adjust timers. this is easy, as the offset is the same for all of them */
2247 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1245#if EV_PERIODIC_ENABLE 2248#if EV_PERIODIC_ENABLE
1246 periodics_reschedule (EV_A); 2249 periodics_reschedule (EV_A);
1247#endif 2250#endif
1248
1249 /* adjust timers. this is easy, as the offset is the same for all */
1250 for (i = 0; i < timercnt; ++i)
1251 ((WT)timers [i])->at += ev_rt_now - mn_now;
1252 } 2251 }
1253 2252
1254 mn_now = ev_rt_now; 2253 mn_now = ev_rt_now;
1255 } 2254 }
1256} 2255}
1257 2256
1258void 2257void
1259ev_ref (EV_P)
1260{
1261 ++activecnt;
1262}
1263
1264void
1265ev_unref (EV_P)
1266{
1267 --activecnt;
1268}
1269
1270static int loop_done;
1271
1272void
1273ev_loop (EV_P_ int flags) 2258ev_loop (EV_P_ int flags)
1274{ 2259{
1275 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2260#if EV_MINIMAL < 2
1276 ? EVUNLOOP_ONE 2261 ++loop_depth;
1277 : EVUNLOOP_CANCEL; 2262#endif
1278 2263
1279 while (activecnt) 2264 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2265
2266 loop_done = EVUNLOOP_CANCEL;
2267
2268 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2269
2270 do
1280 { 2271 {
2272#if EV_VERIFY >= 2
2273 ev_loop_verify (EV_A);
2274#endif
2275
2276#ifndef _WIN32
2277 if (expect_false (curpid)) /* penalise the forking check even more */
2278 if (expect_false (getpid () != curpid))
2279 {
2280 curpid = getpid ();
2281 postfork = 1;
2282 }
2283#endif
2284
2285#if EV_FORK_ENABLE
2286 /* we might have forked, so queue fork handlers */
2287 if (expect_false (postfork))
2288 if (forkcnt)
2289 {
2290 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2291 EV_INVOKE_PENDING;
2292 }
2293#endif
2294
1281 /* queue check watchers (and execute them) */ 2295 /* queue prepare watchers (and execute them) */
1282 if (expect_false (preparecnt)) 2296 if (expect_false (preparecnt))
1283 { 2297 {
1284 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2298 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1285 call_pending (EV_A); 2299 EV_INVOKE_PENDING;
1286 } 2300 }
2301
2302 if (expect_false (loop_done))
2303 break;
1287 2304
1288 /* we might have forked, so reify kernel state if necessary */ 2305 /* we might have forked, so reify kernel state if necessary */
1289 if (expect_false (postfork)) 2306 if (expect_false (postfork))
1290 loop_fork (EV_A); 2307 loop_fork (EV_A);
1291 2308
1292 /* update fd-related kernel structures */ 2309 /* update fd-related kernel structures */
1293 fd_reify (EV_A); 2310 fd_reify (EV_A);
1294 2311
1295 /* calculate blocking time */ 2312 /* calculate blocking time */
1296 { 2313 {
1297 double block; 2314 ev_tstamp waittime = 0.;
2315 ev_tstamp sleeptime = 0.;
1298 2316
1299 if (flags & EVLOOP_NONBLOCK || idlecnt) 2317 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1300 block = 0.; /* do not block at all */
1301 else
1302 { 2318 {
2319 /* remember old timestamp for io_blocktime calculation */
2320 ev_tstamp prev_mn_now = mn_now;
2321
1303 /* update time to cancel out callback processing overhead */ 2322 /* update time to cancel out callback processing overhead */
1304#if EV_USE_MONOTONIC
1305 if (expect_true (have_monotonic))
1306 time_update_monotonic (EV_A); 2323 time_update (EV_A_ 1e100);
1307 else
1308#endif
1309 {
1310 ev_rt_now = ev_time ();
1311 mn_now = ev_rt_now;
1312 }
1313 2324
1314 block = MAX_BLOCKTIME; 2325 waittime = MAX_BLOCKTIME;
1315 2326
1316 if (timercnt) 2327 if (timercnt)
1317 { 2328 {
1318 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 2329 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1319 if (block > to) block = to; 2330 if (waittime > to) waittime = to;
1320 } 2331 }
1321 2332
1322#if EV_PERIODIC_ENABLE 2333#if EV_PERIODIC_ENABLE
1323 if (periodiccnt) 2334 if (periodiccnt)
1324 { 2335 {
1325 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 2336 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1326 if (block > to) block = to; 2337 if (waittime > to) waittime = to;
1327 } 2338 }
1328#endif 2339#endif
1329 2340
2341 /* don't let timeouts decrease the waittime below timeout_blocktime */
2342 if (expect_false (waittime < timeout_blocktime))
2343 waittime = timeout_blocktime;
2344
2345 /* extra check because io_blocktime is commonly 0 */
1330 if (expect_false (block < 0.)) block = 0.; 2346 if (expect_false (io_blocktime))
2347 {
2348 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2349
2350 if (sleeptime > waittime - backend_fudge)
2351 sleeptime = waittime - backend_fudge;
2352
2353 if (expect_true (sleeptime > 0.))
2354 {
2355 ev_sleep (sleeptime);
2356 waittime -= sleeptime;
2357 }
2358 }
1331 } 2359 }
1332 2360
2361#if EV_MINIMAL < 2
2362 ++loop_count;
2363#endif
2364 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
1333 backend_poll (EV_A_ block); 2365 backend_poll (EV_A_ waittime);
2366 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2367
2368 /* update ev_rt_now, do magic */
2369 time_update (EV_A_ waittime + sleeptime);
1334 } 2370 }
1335
1336 /* update ev_rt_now, do magic */
1337 time_update (EV_A);
1338 2371
1339 /* queue pending timers and reschedule them */ 2372 /* queue pending timers and reschedule them */
1340 timers_reify (EV_A); /* relative timers called last */ 2373 timers_reify (EV_A); /* relative timers called last */
1341#if EV_PERIODIC_ENABLE 2374#if EV_PERIODIC_ENABLE
1342 periodics_reify (EV_A); /* absolute timers called first */ 2375 periodics_reify (EV_A); /* absolute timers called first */
1343#endif 2376#endif
1344 2377
2378#if EV_IDLE_ENABLE
1345 /* queue idle watchers unless other events are pending */ 2379 /* queue idle watchers unless other events are pending */
1346 if (idlecnt && !any_pending (EV_A)) 2380 idle_reify (EV_A);
1347 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2381#endif
1348 2382
1349 /* queue check watchers, to be executed first */ 2383 /* queue check watchers, to be executed first */
1350 if (expect_false (checkcnt)) 2384 if (expect_false (checkcnt))
1351 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2385 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1352 2386
1353 call_pending (EV_A); 2387 EV_INVOKE_PENDING;
1354
1355 if (expect_false (loop_done))
1356 break;
1357 } 2388 }
2389 while (expect_true (
2390 activecnt
2391 && !loop_done
2392 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2393 ));
1358 2394
1359 if (loop_done == EVUNLOOP_ONE) 2395 if (loop_done == EVUNLOOP_ONE)
1360 loop_done = EVUNLOOP_CANCEL; 2396 loop_done = EVUNLOOP_CANCEL;
2397
2398#if EV_MINIMAL < 2
2399 --loop_depth;
2400#endif
1361} 2401}
1362 2402
1363void 2403void
1364ev_unloop (EV_P_ int how) 2404ev_unloop (EV_P_ int how)
1365{ 2405{
1366 loop_done = how; 2406 loop_done = how;
1367} 2407}
1368 2408
2409void
2410ev_ref (EV_P)
2411{
2412 ++activecnt;
2413}
2414
2415void
2416ev_unref (EV_P)
2417{
2418 --activecnt;
2419}
2420
2421void
2422ev_now_update (EV_P)
2423{
2424 time_update (EV_A_ 1e100);
2425}
2426
2427void
2428ev_suspend (EV_P)
2429{
2430 ev_now_update (EV_A);
2431}
2432
2433void
2434ev_resume (EV_P)
2435{
2436 ev_tstamp mn_prev = mn_now;
2437
2438 ev_now_update (EV_A);
2439 timers_reschedule (EV_A_ mn_now - mn_prev);
2440#if EV_PERIODIC_ENABLE
2441 /* TODO: really do this? */
2442 periodics_reschedule (EV_A);
2443#endif
2444}
2445
1369/*****************************************************************************/ 2446/*****************************************************************************/
2447/* singly-linked list management, used when the expected list length is short */
1370 2448
1371void inline_size 2449inline_size void
1372wlist_add (WL *head, WL elem) 2450wlist_add (WL *head, WL elem)
1373{ 2451{
1374 elem->next = *head; 2452 elem->next = *head;
1375 *head = elem; 2453 *head = elem;
1376} 2454}
1377 2455
1378void inline_size 2456inline_size void
1379wlist_del (WL *head, WL elem) 2457wlist_del (WL *head, WL elem)
1380{ 2458{
1381 while (*head) 2459 while (*head)
1382 { 2460 {
1383 if (*head == elem) 2461 if (expect_true (*head == elem))
1384 { 2462 {
1385 *head = elem->next; 2463 *head = elem->next;
1386 return; 2464 break;
1387 } 2465 }
1388 2466
1389 head = &(*head)->next; 2467 head = &(*head)->next;
1390 } 2468 }
1391} 2469}
1392 2470
1393void inline_speed 2471/* internal, faster, version of ev_clear_pending */
2472inline_speed void
1394ev_clear_pending (EV_P_ W w) 2473clear_pending (EV_P_ W w)
1395{ 2474{
1396 if (w->pending) 2475 if (w->pending)
1397 { 2476 {
1398 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2477 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1399 w->pending = 0; 2478 w->pending = 0;
1400 } 2479 }
1401} 2480}
1402 2481
1403void inline_speed 2482int
2483ev_clear_pending (EV_P_ void *w)
2484{
2485 W w_ = (W)w;
2486 int pending = w_->pending;
2487
2488 if (expect_true (pending))
2489 {
2490 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2491 p->w = (W)&pending_w;
2492 w_->pending = 0;
2493 return p->events;
2494 }
2495 else
2496 return 0;
2497}
2498
2499inline_size void
2500pri_adjust (EV_P_ W w)
2501{
2502 int pri = ev_priority (w);
2503 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2504 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2505 ev_set_priority (w, pri);
2506}
2507
2508inline_speed void
1404ev_start (EV_P_ W w, int active) 2509ev_start (EV_P_ W w, int active)
1405{ 2510{
1406 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2511 pri_adjust (EV_A_ w);
1407 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1408
1409 w->active = active; 2512 w->active = active;
1410 ev_ref (EV_A); 2513 ev_ref (EV_A);
1411} 2514}
1412 2515
1413void inline_size 2516inline_size void
1414ev_stop (EV_P_ W w) 2517ev_stop (EV_P_ W w)
1415{ 2518{
1416 ev_unref (EV_A); 2519 ev_unref (EV_A);
1417 w->active = 0; 2520 w->active = 0;
1418} 2521}
1419 2522
1420/*****************************************************************************/ 2523/*****************************************************************************/
1421 2524
1422void 2525void noinline
1423ev_io_start (EV_P_ ev_io *w) 2526ev_io_start (EV_P_ ev_io *w)
1424{ 2527{
1425 int fd = w->fd; 2528 int fd = w->fd;
1426 2529
1427 if (expect_false (ev_is_active (w))) 2530 if (expect_false (ev_is_active (w)))
1428 return; 2531 return;
1429 2532
1430 assert (("ev_io_start called with negative fd", fd >= 0)); 2533 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2534 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2535
2536 EV_FREQUENT_CHECK;
1431 2537
1432 ev_start (EV_A_ (W)w, 1); 2538 ev_start (EV_A_ (W)w, 1);
1433 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2539 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1434 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2540 wlist_add (&anfds[fd].head, (WL)w);
1435 2541
1436 fd_change (EV_A_ fd); 2542 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1437} 2543 w->events &= ~EV__IOFDSET;
1438 2544
1439void 2545 EV_FREQUENT_CHECK;
2546}
2547
2548void noinline
1440ev_io_stop (EV_P_ ev_io *w) 2549ev_io_stop (EV_P_ ev_io *w)
1441{ 2550{
1442 ev_clear_pending (EV_A_ (W)w); 2551 clear_pending (EV_A_ (W)w);
1443 if (expect_false (!ev_is_active (w))) 2552 if (expect_false (!ev_is_active (w)))
1444 return; 2553 return;
1445 2554
1446 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2555 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1447 2556
2557 EV_FREQUENT_CHECK;
2558
1448 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2559 wlist_del (&anfds[w->fd].head, (WL)w);
1449 ev_stop (EV_A_ (W)w); 2560 ev_stop (EV_A_ (W)w);
1450 2561
1451 fd_change (EV_A_ w->fd); 2562 fd_change (EV_A_ w->fd, 1);
1452}
1453 2563
1454void 2564 EV_FREQUENT_CHECK;
2565}
2566
2567void noinline
1455ev_timer_start (EV_P_ ev_timer *w) 2568ev_timer_start (EV_P_ ev_timer *w)
1456{ 2569{
1457 if (expect_false (ev_is_active (w))) 2570 if (expect_false (ev_is_active (w)))
1458 return; 2571 return;
1459 2572
1460 ((WT)w)->at += mn_now; 2573 ev_at (w) += mn_now;
1461 2574
1462 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2575 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1463 2576
2577 EV_FREQUENT_CHECK;
2578
2579 ++timercnt;
1464 ev_start (EV_A_ (W)w, ++timercnt); 2580 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1465 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 2581 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1466 timers [timercnt - 1] = w; 2582 ANHE_w (timers [ev_active (w)]) = (WT)w;
1467 upheap ((WT *)timers, timercnt - 1); 2583 ANHE_at_cache (timers [ev_active (w)]);
2584 upheap (timers, ev_active (w));
1468 2585
2586 EV_FREQUENT_CHECK;
2587
1469 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2588 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1470} 2589}
1471 2590
1472void 2591void noinline
1473ev_timer_stop (EV_P_ ev_timer *w) 2592ev_timer_stop (EV_P_ ev_timer *w)
1474{ 2593{
1475 ev_clear_pending (EV_A_ (W)w); 2594 clear_pending (EV_A_ (W)w);
1476 if (expect_false (!ev_is_active (w))) 2595 if (expect_false (!ev_is_active (w)))
1477 return; 2596 return;
1478 2597
2598 EV_FREQUENT_CHECK;
2599
2600 {
2601 int active = ev_active (w);
2602
1479 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2603 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1480 2604
2605 --timercnt;
2606
1481 if (expect_true (((W)w)->active < timercnt--)) 2607 if (expect_true (active < timercnt + HEAP0))
1482 { 2608 {
1483 timers [((W)w)->active - 1] = timers [timercnt]; 2609 timers [active] = timers [timercnt + HEAP0];
1484 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2610 adjustheap (timers, timercnt, active);
1485 } 2611 }
2612 }
1486 2613
1487 ((WT)w)->at -= mn_now; 2614 ev_at (w) -= mn_now;
1488 2615
1489 ev_stop (EV_A_ (W)w); 2616 ev_stop (EV_A_ (W)w);
1490}
1491 2617
1492void 2618 EV_FREQUENT_CHECK;
2619}
2620
2621void noinline
1493ev_timer_again (EV_P_ ev_timer *w) 2622ev_timer_again (EV_P_ ev_timer *w)
1494{ 2623{
2624 EV_FREQUENT_CHECK;
2625
1495 if (ev_is_active (w)) 2626 if (ev_is_active (w))
1496 { 2627 {
1497 if (w->repeat) 2628 if (w->repeat)
1498 { 2629 {
1499 ((WT)w)->at = mn_now + w->repeat; 2630 ev_at (w) = mn_now + w->repeat;
2631 ANHE_at_cache (timers [ev_active (w)]);
1500 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2632 adjustheap (timers, timercnt, ev_active (w));
1501 } 2633 }
1502 else 2634 else
1503 ev_timer_stop (EV_A_ w); 2635 ev_timer_stop (EV_A_ w);
1504 } 2636 }
1505 else if (w->repeat) 2637 else if (w->repeat)
1506 { 2638 {
1507 w->at = w->repeat; 2639 ev_at (w) = w->repeat;
1508 ev_timer_start (EV_A_ w); 2640 ev_timer_start (EV_A_ w);
1509 } 2641 }
2642
2643 EV_FREQUENT_CHECK;
2644}
2645
2646ev_tstamp
2647ev_timer_remaining (EV_P_ ev_timer *w)
2648{
2649 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1510} 2650}
1511 2651
1512#if EV_PERIODIC_ENABLE 2652#if EV_PERIODIC_ENABLE
1513void 2653void noinline
1514ev_periodic_start (EV_P_ ev_periodic *w) 2654ev_periodic_start (EV_P_ ev_periodic *w)
1515{ 2655{
1516 if (expect_false (ev_is_active (w))) 2656 if (expect_false (ev_is_active (w)))
1517 return; 2657 return;
1518 2658
1519 if (w->reschedule_cb) 2659 if (w->reschedule_cb)
1520 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2660 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1521 else if (w->interval) 2661 else if (w->interval)
1522 { 2662 {
1523 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2663 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1524 /* this formula differs from the one in periodic_reify because we do not always round up */ 2664 /* this formula differs from the one in periodic_reify because we do not always round up */
1525 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2665 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1526 } 2666 }
2667 else
2668 ev_at (w) = w->offset;
1527 2669
2670 EV_FREQUENT_CHECK;
2671
2672 ++periodiccnt;
1528 ev_start (EV_A_ (W)w, ++periodiccnt); 2673 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1529 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 2674 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1530 periodics [periodiccnt - 1] = w; 2675 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1531 upheap ((WT *)periodics, periodiccnt - 1); 2676 ANHE_at_cache (periodics [ev_active (w)]);
2677 upheap (periodics, ev_active (w));
1532 2678
2679 EV_FREQUENT_CHECK;
2680
1533 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2681 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1534} 2682}
1535 2683
1536void 2684void noinline
1537ev_periodic_stop (EV_P_ ev_periodic *w) 2685ev_periodic_stop (EV_P_ ev_periodic *w)
1538{ 2686{
1539 ev_clear_pending (EV_A_ (W)w); 2687 clear_pending (EV_A_ (W)w);
1540 if (expect_false (!ev_is_active (w))) 2688 if (expect_false (!ev_is_active (w)))
1541 return; 2689 return;
1542 2690
2691 EV_FREQUENT_CHECK;
2692
2693 {
2694 int active = ev_active (w);
2695
1543 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2696 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1544 2697
2698 --periodiccnt;
2699
1545 if (expect_true (((W)w)->active < periodiccnt--)) 2700 if (expect_true (active < periodiccnt + HEAP0))
1546 { 2701 {
1547 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2702 periodics [active] = periodics [periodiccnt + HEAP0];
1548 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2703 adjustheap (periodics, periodiccnt, active);
1549 } 2704 }
2705 }
1550 2706
1551 ev_stop (EV_A_ (W)w); 2707 ev_stop (EV_A_ (W)w);
1552}
1553 2708
1554void 2709 EV_FREQUENT_CHECK;
2710}
2711
2712void noinline
1555ev_periodic_again (EV_P_ ev_periodic *w) 2713ev_periodic_again (EV_P_ ev_periodic *w)
1556{ 2714{
1557 /* TODO: use adjustheap and recalculation */ 2715 /* TODO: use adjustheap and recalculation */
1558 ev_periodic_stop (EV_A_ w); 2716 ev_periodic_stop (EV_A_ w);
1559 ev_periodic_start (EV_A_ w); 2717 ev_periodic_start (EV_A_ w);
1560} 2718}
1561#endif 2719#endif
1562 2720
1563void 2721#ifndef SA_RESTART
2722# define SA_RESTART 0
2723#endif
2724
2725void noinline
1564ev_idle_start (EV_P_ ev_idle *w) 2726ev_signal_start (EV_P_ ev_signal *w)
1565{ 2727{
1566 if (expect_false (ev_is_active (w))) 2728 if (expect_false (ev_is_active (w)))
1567 return; 2729 return;
1568 2730
2731 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2732
2733#if EV_MULTIPLICITY
2734 assert (("libev: a signal must not be attached to two different loops",
2735 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2736
2737 signals [w->signum - 1].loop = EV_A;
2738#endif
2739
2740 EV_FREQUENT_CHECK;
2741
2742#if EV_USE_SIGNALFD
2743 if (sigfd == -2)
2744 {
2745 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2746 if (sigfd < 0 && errno == EINVAL)
2747 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2748
2749 if (sigfd >= 0)
2750 {
2751 fd_intern (sigfd); /* doing it twice will not hurt */
2752
2753 sigemptyset (&sigfd_set);
2754
2755 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2756 ev_set_priority (&sigfd_w, EV_MAXPRI);
2757 ev_io_start (EV_A_ &sigfd_w);
2758 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2759 }
2760 }
2761
2762 if (sigfd >= 0)
2763 {
2764 /* TODO: check .head */
2765 sigaddset (&sigfd_set, w->signum);
2766 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2767
2768 signalfd (sigfd, &sigfd_set, 0);
2769 }
2770#endif
2771
1569 ev_start (EV_A_ (W)w, ++idlecnt); 2772 ev_start (EV_A_ (W)w, 1);
1570 array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2); 2773 wlist_add (&signals [w->signum - 1].head, (WL)w);
1571 idles [idlecnt - 1] = w;
1572}
1573 2774
1574void 2775 if (!((WL)w)->next)
2776# if EV_USE_SIGNALFD
2777 if (sigfd < 0) /*TODO*/
2778# endif
2779 {
2780# ifdef _WIN32
2781 evpipe_init (EV_A);
2782
2783 signal (w->signum, ev_sighandler);
2784# else
2785 struct sigaction sa;
2786
2787 evpipe_init (EV_A);
2788
2789 sa.sa_handler = ev_sighandler;
2790 sigfillset (&sa.sa_mask);
2791 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2792 sigaction (w->signum, &sa, 0);
2793
2794 sigemptyset (&sa.sa_mask);
2795 sigaddset (&sa.sa_mask, w->signum);
2796 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2797#endif
2798 }
2799
2800 EV_FREQUENT_CHECK;
2801}
2802
2803void noinline
1575ev_idle_stop (EV_P_ ev_idle *w) 2804ev_signal_stop (EV_P_ ev_signal *w)
1576{ 2805{
1577 ev_clear_pending (EV_A_ (W)w); 2806 clear_pending (EV_A_ (W)w);
1578 if (expect_false (!ev_is_active (w))) 2807 if (expect_false (!ev_is_active (w)))
1579 return; 2808 return;
1580 2809
1581 { 2810 EV_FREQUENT_CHECK;
1582 int active = ((W)w)->active;
1583 idles [active - 1] = idles [--idlecnt];
1584 ((W)idles [active - 1])->active = active;
1585 }
1586 2811
2812 wlist_del (&signals [w->signum - 1].head, (WL)w);
1587 ev_stop (EV_A_ (W)w); 2813 ev_stop (EV_A_ (W)w);
1588}
1589 2814
2815 if (!signals [w->signum - 1].head)
2816 {
2817#if EV_MULTIPLICITY
2818 signals [w->signum - 1].loop = 0; /* unattach from signal */
2819#endif
2820#if EV_USE_SIGNALFD
2821 if (sigfd >= 0)
2822 {
2823 sigset_t ss;
2824
2825 sigemptyset (&ss);
2826 sigaddset (&ss, w->signum);
2827 sigdelset (&sigfd_set, w->signum);
2828
2829 signalfd (sigfd, &sigfd_set, 0);
2830 sigprocmask (SIG_UNBLOCK, &ss, 0);
2831 }
2832 else
2833#endif
2834 signal (w->signum, SIG_DFL);
2835 }
2836
2837 EV_FREQUENT_CHECK;
2838}
2839
1590void 2840void
1591ev_prepare_start (EV_P_ ev_prepare *w) 2841ev_child_start (EV_P_ ev_child *w)
1592{ 2842{
2843#if EV_MULTIPLICITY
2844 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2845#endif
1593 if (expect_false (ev_is_active (w))) 2846 if (expect_false (ev_is_active (w)))
1594 return; 2847 return;
1595 2848
2849 EV_FREQUENT_CHECK;
2850
1596 ev_start (EV_A_ (W)w, ++preparecnt); 2851 ev_start (EV_A_ (W)w, 1);
1597 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 2852 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1598 prepares [preparecnt - 1] = w;
1599}
1600 2853
2854 EV_FREQUENT_CHECK;
2855}
2856
1601void 2857void
1602ev_prepare_stop (EV_P_ ev_prepare *w) 2858ev_child_stop (EV_P_ ev_child *w)
1603{ 2859{
1604 ev_clear_pending (EV_A_ (W)w); 2860 clear_pending (EV_A_ (W)w);
1605 if (expect_false (!ev_is_active (w))) 2861 if (expect_false (!ev_is_active (w)))
1606 return; 2862 return;
1607 2863
1608 { 2864 EV_FREQUENT_CHECK;
1609 int active = ((W)w)->active;
1610 prepares [active - 1] = prepares [--preparecnt];
1611 ((W)prepares [active - 1])->active = active;
1612 }
1613 2865
2866 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1614 ev_stop (EV_A_ (W)w); 2867 ev_stop (EV_A_ (W)w);
1615}
1616 2868
1617void 2869 EV_FREQUENT_CHECK;
1618ev_check_start (EV_P_ ev_check *w) 2870}
2871
2872#if EV_STAT_ENABLE
2873
2874# ifdef _WIN32
2875# undef lstat
2876# define lstat(a,b) _stati64 (a,b)
2877# endif
2878
2879#define DEF_STAT_INTERVAL 5.0074891
2880#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2881#define MIN_STAT_INTERVAL 0.1074891
2882
2883static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2884
2885#if EV_USE_INOTIFY
2886
2887/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2888# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2889
2890static void noinline
2891infy_add (EV_P_ ev_stat *w)
1619{ 2892{
1620 if (expect_false (ev_is_active (w))) 2893 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);
2894
2895 if (w->wd >= 0)
2896 {
2897 struct statfs sfs;
2898
2899 /* now local changes will be tracked by inotify, but remote changes won't */
2900 /* unless the filesystem is known to be local, we therefore still poll */
2901 /* also do poll on <2.6.25, but with normal frequency */
2902
2903 if (!fs_2625)
2904 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2905 else if (!statfs (w->path, &sfs)
2906 && (sfs.f_type == 0x1373 /* devfs */
2907 || sfs.f_type == 0xEF53 /* ext2/3 */
2908 || sfs.f_type == 0x3153464a /* jfs */
2909 || sfs.f_type == 0x52654973 /* reiser3 */
2910 || sfs.f_type == 0x01021994 /* tempfs */
2911 || sfs.f_type == 0x58465342 /* xfs */))
2912 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2913 else
2914 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2915 }
2916 else
2917 {
2918 /* can't use inotify, continue to stat */
2919 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2920
2921 /* if path is not there, monitor some parent directory for speedup hints */
2922 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2923 /* but an efficiency issue only */
2924 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2925 {
2926 char path [4096];
2927 strcpy (path, w->path);
2928
2929 do
2930 {
2931 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2932 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2933
2934 char *pend = strrchr (path, '/');
2935
2936 if (!pend || pend == path)
2937 break;
2938
2939 *pend = 0;
2940 w->wd = inotify_add_watch (fs_fd, path, mask);
2941 }
2942 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2943 }
2944 }
2945
2946 if (w->wd >= 0)
2947 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2948
2949 /* now re-arm timer, if required */
2950 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2951 ev_timer_again (EV_A_ &w->timer);
2952 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2953}
2954
2955static void noinline
2956infy_del (EV_P_ ev_stat *w)
2957{
2958 int slot;
2959 int wd = w->wd;
2960
2961 if (wd < 0)
1621 return; 2962 return;
1622 2963
1623 ev_start (EV_A_ (W)w, ++checkcnt); 2964 w->wd = -2;
1624 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 2965 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
1625 checks [checkcnt - 1] = w; 2966 wlist_del (&fs_hash [slot].head, (WL)w);
1626}
1627 2967
1628void 2968 /* remove this watcher, if others are watching it, they will rearm */
1629ev_check_stop (EV_P_ ev_check *w) 2969 inotify_rm_watch (fs_fd, wd);
2970}
2971
2972static void noinline
2973infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
1630{ 2974{
1631 ev_clear_pending (EV_A_ (W)w); 2975 if (slot < 0)
1632 if (expect_false (!ev_is_active (w))) 2976 /* overflow, need to check for all hash slots */
2977 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2978 infy_wd (EV_A_ slot, wd, ev);
2979 else
2980 {
2981 WL w_;
2982
2983 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2984 {
2985 ev_stat *w = (ev_stat *)w_;
2986 w_ = w_->next; /* lets us remove this watcher and all before it */
2987
2988 if (w->wd == wd || wd == -1)
2989 {
2990 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2991 {
2992 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2993 w->wd = -1;
2994 infy_add (EV_A_ w); /* re-add, no matter what */
2995 }
2996
2997 stat_timer_cb (EV_A_ &w->timer, 0);
2998 }
2999 }
3000 }
3001}
3002
3003static void
3004infy_cb (EV_P_ ev_io *w, int revents)
3005{
3006 char buf [EV_INOTIFY_BUFSIZE];
3007 int ofs;
3008 int len = read (fs_fd, buf, sizeof (buf));
3009
3010 for (ofs = 0; ofs < len; )
3011 {
3012 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3013 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3014 ofs += sizeof (struct inotify_event) + ev->len;
3015 }
3016}
3017
3018inline_size unsigned int
3019ev_linux_version (void)
3020{
3021 struct utsname buf;
3022 unsigned int v;
3023 int i;
3024 char *p = buf.release;
3025
3026 if (uname (&buf))
3027 return 0;
3028
3029 for (i = 3+1; --i; )
3030 {
3031 unsigned int c = 0;
3032
3033 for (;;)
3034 {
3035 if (*p >= '0' && *p <= '9')
3036 c = c * 10 + *p++ - '0';
3037 else
3038 {
3039 p += *p == '.';
3040 break;
3041 }
3042 }
3043
3044 v = (v << 8) | c;
3045 }
3046
3047 return v;
3048}
3049
3050inline_size void
3051ev_check_2625 (EV_P)
3052{
3053 /* kernels < 2.6.25 are borked
3054 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3055 */
3056 if (ev_linux_version () < 0x020619)
1633 return; 3057 return;
1634 3058
1635 { 3059 fs_2625 = 1;
1636 int active = ((W)w)->active;
1637 checks [active - 1] = checks [--checkcnt];
1638 ((W)checks [active - 1])->active = active;
1639 }
1640
1641 ev_stop (EV_A_ (W)w);
1642} 3060}
1643 3061
1644#ifndef SA_RESTART 3062inline_size int
1645# define SA_RESTART 0 3063infy_newfd (void)
1646#endif
1647
1648void
1649ev_signal_start (EV_P_ ev_signal *w)
1650{ 3064{
1651#if EV_MULTIPLICITY 3065#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
1652 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3066 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3067 if (fd >= 0)
3068 return fd;
1653#endif 3069#endif
1654 if (expect_false (ev_is_active (w))) 3070 return inotify_init ();
3071}
3072
3073inline_size void
3074infy_init (EV_P)
3075{
3076 if (fs_fd != -2)
1655 return; 3077 return;
1656 3078
1657 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3079 fs_fd = -1;
1658 3080
1659 ev_start (EV_A_ (W)w, 1); 3081 ev_check_2625 (EV_A);
1660 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1661 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1662 3082
1663 if (!((WL)w)->next) 3083 fs_fd = infy_newfd ();
3084
3085 if (fs_fd >= 0)
3086 {
3087 fd_intern (fs_fd);
3088 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3089 ev_set_priority (&fs_w, EV_MAXPRI);
3090 ev_io_start (EV_A_ &fs_w);
3091 ev_unref (EV_A);
1664 { 3092 }
3093}
3094
3095inline_size void
3096infy_fork (EV_P)
3097{
3098 int slot;
3099
3100 if (fs_fd < 0)
3101 return;
3102
3103 ev_ref (EV_A);
3104 ev_io_stop (EV_A_ &fs_w);
3105 close (fs_fd);
3106 fs_fd = infy_newfd ();
3107
3108 if (fs_fd >= 0)
3109 {
3110 fd_intern (fs_fd);
3111 ev_io_set (&fs_w, fs_fd, EV_READ);
3112 ev_io_start (EV_A_ &fs_w);
3113 ev_unref (EV_A);
3114 }
3115
3116 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
3117 {
3118 WL w_ = fs_hash [slot].head;
3119 fs_hash [slot].head = 0;
3120
3121 while (w_)
3122 {
3123 ev_stat *w = (ev_stat *)w_;
3124 w_ = w_->next; /* lets us add this watcher */
3125
3126 w->wd = -1;
3127
3128 if (fs_fd >= 0)
3129 infy_add (EV_A_ w); /* re-add, no matter what */
3130 else
3131 {
3132 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3133 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3134 ev_timer_again (EV_A_ &w->timer);
3135 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3136 }
3137 }
3138 }
3139}
3140
3141#endif
3142
1665#if _WIN32 3143#ifdef _WIN32
1666 signal (w->signum, sighandler); 3144# define EV_LSTAT(p,b) _stati64 (p, b)
1667#else 3145#else
1668 struct sigaction sa; 3146# define EV_LSTAT(p,b) lstat (p, b)
1669 sa.sa_handler = sighandler;
1670 sigfillset (&sa.sa_mask);
1671 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1672 sigaction (w->signum, &sa, 0);
1673#endif
1674 }
1675}
1676
1677void
1678ev_signal_stop (EV_P_ ev_signal *w)
1679{
1680 ev_clear_pending (EV_A_ (W)w);
1681 if (expect_false (!ev_is_active (w)))
1682 return;
1683
1684 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1685 ev_stop (EV_A_ (W)w);
1686
1687 if (!signals [w->signum - 1].head)
1688 signal (w->signum, SIG_DFL);
1689}
1690
1691void
1692ev_child_start (EV_P_ ev_child *w)
1693{
1694#if EV_MULTIPLICITY
1695 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1696#endif
1697 if (expect_false (ev_is_active (w)))
1698 return;
1699
1700 ev_start (EV_A_ (W)w, 1);
1701 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1702}
1703
1704void
1705ev_child_stop (EV_P_ ev_child *w)
1706{
1707 ev_clear_pending (EV_A_ (W)w);
1708 if (expect_false (!ev_is_active (w)))
1709 return;
1710
1711 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1712 ev_stop (EV_A_ (W)w);
1713}
1714
1715#if EV_EMBED_ENABLE
1716void noinline
1717ev_embed_sweep (EV_P_ ev_embed *w)
1718{
1719 ev_loop (w->loop, EVLOOP_NONBLOCK);
1720}
1721
1722static void
1723embed_cb (EV_P_ ev_io *io, int revents)
1724{
1725 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
1726
1727 if (ev_cb (w))
1728 ev_feed_event (EV_A_ (W)w, EV_EMBED);
1729 else
1730 ev_embed_sweep (loop, w);
1731}
1732
1733void
1734ev_embed_start (EV_P_ ev_embed *w)
1735{
1736 if (expect_false (ev_is_active (w)))
1737 return;
1738
1739 {
1740 struct ev_loop *loop = w->loop;
1741 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
1742 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
1743 }
1744
1745 ev_set_priority (&w->io, ev_priority (w));
1746 ev_io_start (EV_A_ &w->io);
1747
1748 ev_start (EV_A_ (W)w, 1);
1749}
1750
1751void
1752ev_embed_stop (EV_P_ ev_embed *w)
1753{
1754 ev_clear_pending (EV_A_ (W)w);
1755 if (expect_false (!ev_is_active (w)))
1756 return;
1757
1758 ev_io_stop (EV_A_ &w->io);
1759
1760 ev_stop (EV_A_ (W)w);
1761}
1762#endif
1763
1764#if EV_STAT_ENABLE
1765
1766# ifdef _WIN32
1767# define lstat(a,b) stat(a,b)
1768# endif 3147#endif
1769 3148
1770void 3149void
1771ev_stat_stat (EV_P_ ev_stat *w) 3150ev_stat_stat (EV_P_ ev_stat *w)
1772{ 3151{
1773 if (lstat (w->path, &w->attr) < 0) 3152 if (lstat (w->path, &w->attr) < 0)
1774 w->attr.st_nlink = 0; 3153 w->attr.st_nlink = 0;
1775 else if (!w->attr.st_nlink) 3154 else if (!w->attr.st_nlink)
1776 w->attr.st_nlink = 1; 3155 w->attr.st_nlink = 1;
1777} 3156}
1778 3157
1779static void 3158static void noinline
1780stat_timer_cb (EV_P_ ev_timer *w_, int revents) 3159stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1781{ 3160{
1782 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 3161 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
1783 3162
1784 /* we copy this here each the time so that */ 3163 ev_statdata prev = w->attr;
1785 /* prev has the old value when the callback gets invoked */
1786 w->prev = w->attr;
1787 ev_stat_stat (EV_A_ w); 3164 ev_stat_stat (EV_A_ w);
1788 3165
1789 if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata))) 3166 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3167 if (
3168 prev.st_dev != w->attr.st_dev
3169 || prev.st_ino != w->attr.st_ino
3170 || prev.st_mode != w->attr.st_mode
3171 || prev.st_nlink != w->attr.st_nlink
3172 || prev.st_uid != w->attr.st_uid
3173 || prev.st_gid != w->attr.st_gid
3174 || prev.st_rdev != w->attr.st_rdev
3175 || prev.st_size != w->attr.st_size
3176 || prev.st_atime != w->attr.st_atime
3177 || prev.st_mtime != w->attr.st_mtime
3178 || prev.st_ctime != w->attr.st_ctime
3179 ) {
3180 /* we only update w->prev on actual differences */
3181 /* in case we test more often than invoke the callback, */
3182 /* to ensure that prev is always different to attr */
3183 w->prev = prev;
3184
3185 #if EV_USE_INOTIFY
3186 if (fs_fd >= 0)
3187 {
3188 infy_del (EV_A_ w);
3189 infy_add (EV_A_ w);
3190 ev_stat_stat (EV_A_ w); /* avoid race... */
3191 }
3192 #endif
3193
1790 ev_feed_event (EV_A_ w, EV_STAT); 3194 ev_feed_event (EV_A_ w, EV_STAT);
3195 }
1791} 3196}
1792 3197
1793void 3198void
1794ev_stat_start (EV_P_ ev_stat *w) 3199ev_stat_start (EV_P_ ev_stat *w)
1795{ 3200{
1796 if (expect_false (ev_is_active (w))) 3201 if (expect_false (ev_is_active (w)))
1797 return; 3202 return;
1798 3203
1799 /* since we use memcmp, we need to clear any padding data etc. */
1800 memset (&w->prev, 0, sizeof (ev_statdata));
1801 memset (&w->attr, 0, sizeof (ev_statdata));
1802
1803 ev_stat_stat (EV_A_ w); 3204 ev_stat_stat (EV_A_ w);
1804 3205
3206 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3207 w->interval = MIN_STAT_INTERVAL;
3208
1805 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 3209 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
1806 ev_set_priority (&w->timer, ev_priority (w)); 3210 ev_set_priority (&w->timer, ev_priority (w));
3211
3212#if EV_USE_INOTIFY
3213 infy_init (EV_A);
3214
3215 if (fs_fd >= 0)
3216 infy_add (EV_A_ w);
3217 else
3218#endif
3219 {
1807 ev_timer_start (EV_A_ &w->timer); 3220 ev_timer_again (EV_A_ &w->timer);
3221 ev_unref (EV_A);
3222 }
1808 3223
1809 ev_start (EV_A_ (W)w, 1); 3224 ev_start (EV_A_ (W)w, 1);
3225
3226 EV_FREQUENT_CHECK;
1810} 3227}
1811 3228
1812void 3229void
1813ev_stat_stop (EV_P_ ev_stat *w) 3230ev_stat_stop (EV_P_ ev_stat *w)
1814{ 3231{
1815 ev_clear_pending (EV_A_ (W)w); 3232 clear_pending (EV_A_ (W)w);
1816 if (expect_false (!ev_is_active (w))) 3233 if (expect_false (!ev_is_active (w)))
1817 return; 3234 return;
1818 3235
3236 EV_FREQUENT_CHECK;
3237
3238#if EV_USE_INOTIFY
3239 infy_del (EV_A_ w);
3240#endif
3241
3242 if (ev_is_active (&w->timer))
3243 {
3244 ev_ref (EV_A);
1819 ev_timer_stop (EV_A_ &w->timer); 3245 ev_timer_stop (EV_A_ &w->timer);
3246 }
1820 3247
1821 ev_stop (EV_A_ (W)w); 3248 ev_stop (EV_A_ (W)w);
3249
3250 EV_FREQUENT_CHECK;
3251}
3252#endif
3253
3254#if EV_IDLE_ENABLE
3255void
3256ev_idle_start (EV_P_ ev_idle *w)
3257{
3258 if (expect_false (ev_is_active (w)))
3259 return;
3260
3261 pri_adjust (EV_A_ (W)w);
3262
3263 EV_FREQUENT_CHECK;
3264
3265 {
3266 int active = ++idlecnt [ABSPRI (w)];
3267
3268 ++idleall;
3269 ev_start (EV_A_ (W)w, active);
3270
3271 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3272 idles [ABSPRI (w)][active - 1] = w;
3273 }
3274
3275 EV_FREQUENT_CHECK;
3276}
3277
3278void
3279ev_idle_stop (EV_P_ ev_idle *w)
3280{
3281 clear_pending (EV_A_ (W)w);
3282 if (expect_false (!ev_is_active (w)))
3283 return;
3284
3285 EV_FREQUENT_CHECK;
3286
3287 {
3288 int active = ev_active (w);
3289
3290 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3291 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3292
3293 ev_stop (EV_A_ (W)w);
3294 --idleall;
3295 }
3296
3297 EV_FREQUENT_CHECK;
3298}
3299#endif
3300
3301void
3302ev_prepare_start (EV_P_ ev_prepare *w)
3303{
3304 if (expect_false (ev_is_active (w)))
3305 return;
3306
3307 EV_FREQUENT_CHECK;
3308
3309 ev_start (EV_A_ (W)w, ++preparecnt);
3310 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3311 prepares [preparecnt - 1] = w;
3312
3313 EV_FREQUENT_CHECK;
3314}
3315
3316void
3317ev_prepare_stop (EV_P_ ev_prepare *w)
3318{
3319 clear_pending (EV_A_ (W)w);
3320 if (expect_false (!ev_is_active (w)))
3321 return;
3322
3323 EV_FREQUENT_CHECK;
3324
3325 {
3326 int active = ev_active (w);
3327
3328 prepares [active - 1] = prepares [--preparecnt];
3329 ev_active (prepares [active - 1]) = active;
3330 }
3331
3332 ev_stop (EV_A_ (W)w);
3333
3334 EV_FREQUENT_CHECK;
3335}
3336
3337void
3338ev_check_start (EV_P_ ev_check *w)
3339{
3340 if (expect_false (ev_is_active (w)))
3341 return;
3342
3343 EV_FREQUENT_CHECK;
3344
3345 ev_start (EV_A_ (W)w, ++checkcnt);
3346 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3347 checks [checkcnt - 1] = w;
3348
3349 EV_FREQUENT_CHECK;
3350}
3351
3352void
3353ev_check_stop (EV_P_ ev_check *w)
3354{
3355 clear_pending (EV_A_ (W)w);
3356 if (expect_false (!ev_is_active (w)))
3357 return;
3358
3359 EV_FREQUENT_CHECK;
3360
3361 {
3362 int active = ev_active (w);
3363
3364 checks [active - 1] = checks [--checkcnt];
3365 ev_active (checks [active - 1]) = active;
3366 }
3367
3368 ev_stop (EV_A_ (W)w);
3369
3370 EV_FREQUENT_CHECK;
3371}
3372
3373#if EV_EMBED_ENABLE
3374void noinline
3375ev_embed_sweep (EV_P_ ev_embed *w)
3376{
3377 ev_loop (w->other, EVLOOP_NONBLOCK);
3378}
3379
3380static void
3381embed_io_cb (EV_P_ ev_io *io, int revents)
3382{
3383 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3384
3385 if (ev_cb (w))
3386 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3387 else
3388 ev_loop (w->other, EVLOOP_NONBLOCK);
3389}
3390
3391static void
3392embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3393{
3394 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3395
3396 {
3397 EV_P = w->other;
3398
3399 while (fdchangecnt)
3400 {
3401 fd_reify (EV_A);
3402 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3403 }
3404 }
3405}
3406
3407static void
3408embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3409{
3410 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3411
3412 ev_embed_stop (EV_A_ w);
3413
3414 {
3415 EV_P = w->other;
3416
3417 ev_loop_fork (EV_A);
3418 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3419 }
3420
3421 ev_embed_start (EV_A_ w);
3422}
3423
3424#if 0
3425static void
3426embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3427{
3428 ev_idle_stop (EV_A_ idle);
3429}
3430#endif
3431
3432void
3433ev_embed_start (EV_P_ ev_embed *w)
3434{
3435 if (expect_false (ev_is_active (w)))
3436 return;
3437
3438 {
3439 EV_P = w->other;
3440 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3441 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3442 }
3443
3444 EV_FREQUENT_CHECK;
3445
3446 ev_set_priority (&w->io, ev_priority (w));
3447 ev_io_start (EV_A_ &w->io);
3448
3449 ev_prepare_init (&w->prepare, embed_prepare_cb);
3450 ev_set_priority (&w->prepare, EV_MINPRI);
3451 ev_prepare_start (EV_A_ &w->prepare);
3452
3453 ev_fork_init (&w->fork, embed_fork_cb);
3454 ev_fork_start (EV_A_ &w->fork);
3455
3456 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3457
3458 ev_start (EV_A_ (W)w, 1);
3459
3460 EV_FREQUENT_CHECK;
3461}
3462
3463void
3464ev_embed_stop (EV_P_ ev_embed *w)
3465{
3466 clear_pending (EV_A_ (W)w);
3467 if (expect_false (!ev_is_active (w)))
3468 return;
3469
3470 EV_FREQUENT_CHECK;
3471
3472 ev_io_stop (EV_A_ &w->io);
3473 ev_prepare_stop (EV_A_ &w->prepare);
3474 ev_fork_stop (EV_A_ &w->fork);
3475
3476 ev_stop (EV_A_ (W)w);
3477
3478 EV_FREQUENT_CHECK;
3479}
3480#endif
3481
3482#if EV_FORK_ENABLE
3483void
3484ev_fork_start (EV_P_ ev_fork *w)
3485{
3486 if (expect_false (ev_is_active (w)))
3487 return;
3488
3489 EV_FREQUENT_CHECK;
3490
3491 ev_start (EV_A_ (W)w, ++forkcnt);
3492 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3493 forks [forkcnt - 1] = w;
3494
3495 EV_FREQUENT_CHECK;
3496}
3497
3498void
3499ev_fork_stop (EV_P_ ev_fork *w)
3500{
3501 clear_pending (EV_A_ (W)w);
3502 if (expect_false (!ev_is_active (w)))
3503 return;
3504
3505 EV_FREQUENT_CHECK;
3506
3507 {
3508 int active = ev_active (w);
3509
3510 forks [active - 1] = forks [--forkcnt];
3511 ev_active (forks [active - 1]) = active;
3512 }
3513
3514 ev_stop (EV_A_ (W)w);
3515
3516 EV_FREQUENT_CHECK;
3517}
3518#endif
3519
3520#if EV_ASYNC_ENABLE
3521void
3522ev_async_start (EV_P_ ev_async *w)
3523{
3524 if (expect_false (ev_is_active (w)))
3525 return;
3526
3527 evpipe_init (EV_A);
3528
3529 EV_FREQUENT_CHECK;
3530
3531 ev_start (EV_A_ (W)w, ++asynccnt);
3532 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3533 asyncs [asynccnt - 1] = w;
3534
3535 EV_FREQUENT_CHECK;
3536}
3537
3538void
3539ev_async_stop (EV_P_ ev_async *w)
3540{
3541 clear_pending (EV_A_ (W)w);
3542 if (expect_false (!ev_is_active (w)))
3543 return;
3544
3545 EV_FREQUENT_CHECK;
3546
3547 {
3548 int active = ev_active (w);
3549
3550 asyncs [active - 1] = asyncs [--asynccnt];
3551 ev_active (asyncs [active - 1]) = active;
3552 }
3553
3554 ev_stop (EV_A_ (W)w);
3555
3556 EV_FREQUENT_CHECK;
3557}
3558
3559void
3560ev_async_send (EV_P_ ev_async *w)
3561{
3562 w->sent = 1;
3563 evpipe_write (EV_A_ &async_pending);
1822} 3564}
1823#endif 3565#endif
1824 3566
1825/*****************************************************************************/ 3567/*****************************************************************************/
1826 3568
… …
1836once_cb (EV_P_ struct ev_once *once, int revents) 3578once_cb (EV_P_ struct ev_once *once, int revents)
1837{ 3579{
1838 void (*cb)(int revents, void *arg) = once->cb; 3580 void (*cb)(int revents, void *arg) = once->cb;
1839 void *arg = once->arg; 3581 void *arg = once->arg;
1840 3582
1841 ev_io_stop (EV_A_ &once->io); 3583 ev_io_stop (EV_A_ &once->io);
1842 ev_timer_stop (EV_A_ &once->to); 3584 ev_timer_stop (EV_A_ &once->to);
1843 ev_free (once); 3585 ev_free (once);
1844 3586
1845 cb (revents, arg); 3587 cb (revents, arg);
1846} 3588}
1847 3589
1848static void 3590static void
1849once_cb_io (EV_P_ ev_io *w, int revents) 3591once_cb_io (EV_P_ ev_io *w, int revents)
1850{ 3592{
1851 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3593 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3594
3595 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1852} 3596}
1853 3597
1854static void 3598static void
1855once_cb_to (EV_P_ ev_timer *w, int revents) 3599once_cb_to (EV_P_ ev_timer *w, int revents)
1856{ 3600{
1857 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3601 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3602
3603 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1858} 3604}
1859 3605
1860void 3606void
1861ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3607ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1862{ 3608{
… …
1884 ev_timer_set (&once->to, timeout, 0.); 3630 ev_timer_set (&once->to, timeout, 0.);
1885 ev_timer_start (EV_A_ &once->to); 3631 ev_timer_start (EV_A_ &once->to);
1886 } 3632 }
1887} 3633}
1888 3634
3635/*****************************************************************************/
3636
3637#if EV_WALK_ENABLE
3638void
3639ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3640{
3641 int i, j;
3642 ev_watcher_list *wl, *wn;
3643
3644 if (types & (EV_IO | EV_EMBED))
3645 for (i = 0; i < anfdmax; ++i)
3646 for (wl = anfds [i].head; wl; )
3647 {
3648 wn = wl->next;
3649
3650#if EV_EMBED_ENABLE
3651 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3652 {
3653 if (types & EV_EMBED)
3654 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3655 }
3656 else
3657#endif
3658#if EV_USE_INOTIFY
3659 if (ev_cb ((ev_io *)wl) == infy_cb)
3660 ;
3661 else
3662#endif
3663 if ((ev_io *)wl != &pipe_w)
3664 if (types & EV_IO)
3665 cb (EV_A_ EV_IO, wl);
3666
3667 wl = wn;
3668 }
3669
3670 if (types & (EV_TIMER | EV_STAT))
3671 for (i = timercnt + HEAP0; i-- > HEAP0; )
3672#if EV_STAT_ENABLE
3673 /*TODO: timer is not always active*/
3674 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3675 {
3676 if (types & EV_STAT)
3677 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3678 }
3679 else
3680#endif
3681 if (types & EV_TIMER)
3682 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3683
3684#if EV_PERIODIC_ENABLE
3685 if (types & EV_PERIODIC)
3686 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3687 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3688#endif
3689
3690#if EV_IDLE_ENABLE
3691 if (types & EV_IDLE)
3692 for (j = NUMPRI; i--; )
3693 for (i = idlecnt [j]; i--; )
3694 cb (EV_A_ EV_IDLE, idles [j][i]);
3695#endif
3696
3697#if EV_FORK_ENABLE
3698 if (types & EV_FORK)
3699 for (i = forkcnt; i--; )
3700 if (ev_cb (forks [i]) != embed_fork_cb)
3701 cb (EV_A_ EV_FORK, forks [i]);
3702#endif
3703
3704#if EV_ASYNC_ENABLE
3705 if (types & EV_ASYNC)
3706 for (i = asynccnt; i--; )
3707 cb (EV_A_ EV_ASYNC, asyncs [i]);
3708#endif
3709
3710 if (types & EV_PREPARE)
3711 for (i = preparecnt; i--; )
3712#if EV_EMBED_ENABLE
3713 if (ev_cb (prepares [i]) != embed_prepare_cb)
3714#endif
3715 cb (EV_A_ EV_PREPARE, prepares [i]);
3716
3717 if (types & EV_CHECK)
3718 for (i = checkcnt; i--; )
3719 cb (EV_A_ EV_CHECK, checks [i]);
3720
3721 if (types & EV_SIGNAL)
3722 for (i = 0; i < EV_NSIG - 1; ++i)
3723 for (wl = signals [i].head; wl; )
3724 {
3725 wn = wl->next;
3726 cb (EV_A_ EV_SIGNAL, wl);
3727 wl = wn;
3728 }
3729
3730 if (types & EV_CHILD)
3731 for (i = EV_PID_HASHSIZE; i--; )
3732 for (wl = childs [i]; wl; )
3733 {
3734 wn = wl->next;
3735 cb (EV_A_ EV_CHILD, wl);
3736 wl = wn;
3737 }
3738/* EV_STAT 0x00001000 /* stat data changed */
3739/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3740}
3741#endif
3742
3743#if EV_MULTIPLICITY
3744 #include "ev_wrap.h"
3745#endif
3746
1889#ifdef __cplusplus 3747#ifdef __cplusplus
1890} 3748}
1891#endif 3749#endif
1892 3750

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