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Comparing libev/ev.c (file contents):
Revision 1.139 by root, Sun Nov 25 09:24:37 2007 UTC vs.
Revision 1.330 by root, Tue Mar 9 08:46:17 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>
114 171
172#ifdef EV_H
173# include EV_H
174#else
175# include "ev.h"
176#endif
177
115#ifndef _WIN32 178#ifndef _WIN32
116# include <unistd.h>
117# include <sys/time.h> 179# include <sys/time.h>
118# include <sys/wait.h> 180# include <sys/wait.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
125#endif 189#endif
126 190
127/**/ 191/* this block tries to deduce configuration from header-defined symbols and defaults */
192
193/* try to deduce the maximum number of signals on this platform */
194#if defined (EV_NSIG)
195/* use what's provided */
196#elif defined (NSIG)
197# define EV_NSIG (NSIG)
198#elif defined(_NSIG)
199# define EV_NSIG (_NSIG)
200#elif defined (SIGMAX)
201# define EV_NSIG (SIGMAX+1)
202#elif defined (SIG_MAX)
203# define EV_NSIG (SIG_MAX+1)
204#elif defined (_SIG_MAX)
205# define EV_NSIG (_SIG_MAX+1)
206#elif defined (MAXSIG)
207# define EV_NSIG (MAXSIG+1)
208#elif defined (MAX_SIG)
209# define EV_NSIG (MAX_SIG+1)
210#elif defined (SIGARRAYSIZE)
211# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */
212#elif defined (_sys_nsig)
213# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
214#else
215# error "unable to find value for NSIG, please report"
216/* to make it compile regardless, just remove the above line */
217# define EV_NSIG 65
218#endif
219
220#ifndef EV_USE_CLOCK_SYSCALL
221# if __linux && __GLIBC__ >= 2
222# define EV_USE_CLOCK_SYSCALL 1
223# else
224# define EV_USE_CLOCK_SYSCALL 0
225# endif
226#endif
128 227
129#ifndef EV_USE_MONOTONIC 228#ifndef EV_USE_MONOTONIC
229# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
230# define EV_USE_MONOTONIC 1
231# else
130# define EV_USE_MONOTONIC 0 232# define EV_USE_MONOTONIC 0
233# endif
131#endif 234#endif
132 235
133#ifndef EV_USE_REALTIME 236#ifndef EV_USE_REALTIME
134# define EV_USE_REALTIME 0 237# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
238#endif
239
240#ifndef EV_USE_NANOSLEEP
241# if _POSIX_C_SOURCE >= 199309L
242# define EV_USE_NANOSLEEP 1
243# else
244# define EV_USE_NANOSLEEP 0
245# endif
135#endif 246#endif
136 247
137#ifndef EV_USE_SELECT 248#ifndef EV_USE_SELECT
138# define EV_USE_SELECT 1 249# define EV_USE_SELECT 1
139#endif 250#endif
… …
145# define EV_USE_POLL 1 256# define EV_USE_POLL 1
146# endif 257# endif
147#endif 258#endif
148 259
149#ifndef EV_USE_EPOLL 260#ifndef EV_USE_EPOLL
261# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
262# define EV_USE_EPOLL 1
263# else
150# define EV_USE_EPOLL 0 264# define EV_USE_EPOLL 0
265# endif
151#endif 266#endif
152 267
153#ifndef EV_USE_KQUEUE 268#ifndef EV_USE_KQUEUE
154# define EV_USE_KQUEUE 0 269# define EV_USE_KQUEUE 0
155#endif 270#endif
156 271
157#ifndef EV_USE_PORT 272#ifndef EV_USE_PORT
158# define EV_USE_PORT 0 273# define EV_USE_PORT 0
159#endif 274#endif
160 275
161/**/ 276#ifndef EV_USE_INOTIFY
277# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
278# define EV_USE_INOTIFY 1
279# else
280# define EV_USE_INOTIFY 0
281# endif
282#endif
283
284#ifndef EV_PID_HASHSIZE
285# if EV_MINIMAL
286# define EV_PID_HASHSIZE 1
287# else
288# define EV_PID_HASHSIZE 16
289# endif
290#endif
291
292#ifndef EV_INOTIFY_HASHSIZE
293# if EV_MINIMAL
294# define EV_INOTIFY_HASHSIZE 1
295# else
296# define EV_INOTIFY_HASHSIZE 16
297# endif
298#endif
299
300#ifndef EV_USE_EVENTFD
301# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
302# define EV_USE_EVENTFD 1
303# else
304# define EV_USE_EVENTFD 0
305# endif
306#endif
307
308#ifndef EV_USE_SIGNALFD
309# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
310# define EV_USE_SIGNALFD 1
311# else
312# define EV_USE_SIGNALFD 0
313# endif
314#endif
315
316#if 0 /* debugging */
317# define EV_VERIFY 3
318# define EV_USE_4HEAP 1
319# define EV_HEAP_CACHE_AT 1
320#endif
321
322#ifndef EV_VERIFY
323# define EV_VERIFY !EV_MINIMAL
324#endif
325
326#ifndef EV_USE_4HEAP
327# define EV_USE_4HEAP !EV_MINIMAL
328#endif
329
330#ifndef EV_HEAP_CACHE_AT
331# define EV_HEAP_CACHE_AT !EV_MINIMAL
332#endif
333
334/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
335/* which makes programs even slower. might work on other unices, too. */
336#if EV_USE_CLOCK_SYSCALL
337# include <syscall.h>
338# ifdef SYS_clock_gettime
339# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
340# undef EV_USE_MONOTONIC
341# define EV_USE_MONOTONIC 1
342# else
343# undef EV_USE_CLOCK_SYSCALL
344# define EV_USE_CLOCK_SYSCALL 0
345# endif
346#endif
347
348/* this block fixes any misconfiguration where we know we run into trouble otherwise */
349
350#ifdef _AIX
351/* AIX has a completely broken poll.h header */
352# undef EV_USE_POLL
353# define EV_USE_POLL 0
354#endif
162 355
163#ifndef CLOCK_MONOTONIC 356#ifndef CLOCK_MONOTONIC
164# undef EV_USE_MONOTONIC 357# undef EV_USE_MONOTONIC
165# define EV_USE_MONOTONIC 0 358# define EV_USE_MONOTONIC 0
166#endif 359#endif
… …
168#ifndef CLOCK_REALTIME 361#ifndef CLOCK_REALTIME
169# undef EV_USE_REALTIME 362# undef EV_USE_REALTIME
170# define EV_USE_REALTIME 0 363# define EV_USE_REALTIME 0
171#endif 364#endif
172 365
366#if !EV_STAT_ENABLE
367# undef EV_USE_INOTIFY
368# define EV_USE_INOTIFY 0
369#endif
370
371#if !EV_USE_NANOSLEEP
372# ifndef _WIN32
373# include <sys/select.h>
374# endif
375#endif
376
377#if EV_USE_INOTIFY
378# include <sys/utsname.h>
379# include <sys/statfs.h>
380# include <sys/inotify.h>
381/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
382# ifndef IN_DONT_FOLLOW
383# undef EV_USE_INOTIFY
384# define EV_USE_INOTIFY 0
385# endif
386#endif
387
173#if EV_SELECT_IS_WINSOCKET 388#if EV_SELECT_IS_WINSOCKET
174# include <winsock.h> 389# include <winsock.h>
175#endif 390#endif
176 391
392#if EV_USE_EVENTFD
393/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
394# include <stdint.h>
395# ifndef EFD_NONBLOCK
396# define EFD_NONBLOCK O_NONBLOCK
397# endif
398# ifndef EFD_CLOEXEC
399# ifdef O_CLOEXEC
400# define EFD_CLOEXEC O_CLOEXEC
401# else
402# define EFD_CLOEXEC 02000000
403# endif
404# endif
405# ifdef __cplusplus
406extern "C" {
407# endif
408int (eventfd) (unsigned int initval, int flags);
409# ifdef __cplusplus
410}
411# endif
412#endif
413
414#if EV_USE_SIGNALFD
415/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
416# include <stdint.h>
417# ifndef SFD_NONBLOCK
418# define SFD_NONBLOCK O_NONBLOCK
419# endif
420# ifndef SFD_CLOEXEC
421# ifdef O_CLOEXEC
422# define SFD_CLOEXEC O_CLOEXEC
423# else
424# define SFD_CLOEXEC 02000000
425# endif
426# endif
427# ifdef __cplusplus
428extern "C" {
429# endif
430int signalfd (int fd, const sigset_t *mask, int flags);
431
432struct signalfd_siginfo
433{
434 uint32_t ssi_signo;
435 char pad[128 - sizeof (uint32_t)];
436};
437# ifdef __cplusplus
438}
439# endif
440#endif
441
442
177/**/ 443/**/
444
445#if EV_VERIFY >= 3
446# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
447#else
448# define EV_FREQUENT_CHECK do { } while (0)
449#endif
450
451/*
452 * This is used to avoid floating point rounding problems.
453 * It is added to ev_rt_now when scheduling periodics
454 * to ensure progress, time-wise, even when rounding
455 * errors are against us.
456 * This value is good at least till the year 4000.
457 * Better solutions welcome.
458 */
459#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
178 460
179#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 461#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) */ 462#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 */
183 463
184#ifdef EV_H
185# include EV_H
186#else
187# include "ev.h"
188#endif
189
190#if __GNUC__ >= 3 464#if __GNUC__ >= 4
191# define expect(expr,value) __builtin_expect ((expr),(value)) 465# define expect(expr,value) __builtin_expect ((expr),(value))
192# define inline static inline 466# define noinline __attribute__ ((noinline))
193#else 467#else
194# define expect(expr,value) (expr) 468# define expect(expr,value) (expr)
195# define inline static 469# define noinline
470# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
471# define inline
472# endif
196#endif 473#endif
197 474
198#define expect_false(expr) expect ((expr) != 0, 0) 475#define expect_false(expr) expect ((expr) != 0, 0)
199#define expect_true(expr) expect ((expr) != 0, 1) 476#define expect_true(expr) expect ((expr) != 0, 1)
477#define inline_size static inline
200 478
479#if EV_MINIMAL
480# define inline_speed static noinline
481#else
482# define inline_speed static inline
483#endif
484
201#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 485#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
486
487#if EV_MINPRI == EV_MAXPRI
488# define ABSPRI(w) (((W)w), 0)
489#else
202#define ABSPRI(w) ((w)->priority - EV_MINPRI) 490# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
491#endif
203 492
204#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ 493#define EMPTY /* required for microsofts broken pseudo-c compiler */
205#define EMPTY2(a,b) /* used to suppress some warnings */ 494#define EMPTY2(a,b) /* used to suppress some warnings */
206 495
207typedef ev_watcher *W; 496typedef ev_watcher *W;
208typedef ev_watcher_list *WL; 497typedef ev_watcher_list *WL;
209typedef ev_watcher_time *WT; 498typedef ev_watcher_time *WT;
210 499
500#define ev_active(w) ((W)(w))->active
501#define ev_at(w) ((WT)(w))->at
502
503#if EV_USE_REALTIME
504/* sig_atomic_t is used to avoid per-thread variables or locking but still */
505/* giving it a reasonably high chance of working on typical architetcures */
506static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
507#endif
508
509#if EV_USE_MONOTONIC
211static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 510static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
511#endif
512
513#ifndef EV_FD_TO_WIN32_HANDLE
514# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
515#endif
516#ifndef EV_WIN32_HANDLE_TO_FD
517# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
518#endif
519#ifndef EV_WIN32_CLOSE_FD
520# define EV_WIN32_CLOSE_FD(fd) close (fd)
521#endif
212 522
213#ifdef _WIN32 523#ifdef _WIN32
214# include "ev_win32.c" 524# include "ev_win32.c"
215#endif 525#endif
216 526
217/*****************************************************************************/ 527/*****************************************************************************/
218 528
219static void (*syserr_cb)(const char *msg); 529static void (*syserr_cb)(const char *msg);
220 530
531void
221void ev_set_syserr_cb (void (*cb)(const char *msg)) 532ev_set_syserr_cb (void (*cb)(const char *msg))
222{ 533{
223 syserr_cb = cb; 534 syserr_cb = cb;
224} 535}
225 536
226static void 537static void noinline
227syserr (const char *msg) 538ev_syserr (const char *msg)
228{ 539{
229 if (!msg) 540 if (!msg)
230 msg = "(libev) system error"; 541 msg = "(libev) system error";
231 542
232 if (syserr_cb) 543 if (syserr_cb)
233 syserr_cb (msg); 544 syserr_cb (msg);
234 else 545 else
235 { 546 {
547#if EV_AVOID_STDIO
548 write (STDERR_FILENO, msg, strlen (msg));
549 write (STDERR_FILENO, ": ", 2);
550 msg = strerror (errno);
551 write (STDERR_FILENO, msg, strlen (msg));
552 write (STDERR_FILENO, "\n", 1);
553#else
236 perror (msg); 554 perror (msg);
555#endif
237 abort (); 556 abort ();
238 } 557 }
239} 558}
240 559
560static void *
561ev_realloc_emul (void *ptr, long size)
562{
563 /* some systems, notably openbsd and darwin, fail to properly
564 * implement realloc (x, 0) (as required by both ansi c-98 and
565 * the single unix specification, so work around them here.
566 */
567
568 if (size)
569 return realloc (ptr, size);
570
571 free (ptr);
572 return 0;
573}
574
241static void *(*alloc)(void *ptr, long size); 575static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
242 576
577void
243void ev_set_allocator (void *(*cb)(void *ptr, long size)) 578ev_set_allocator (void *(*cb)(void *ptr, long size))
244{ 579{
245 alloc = cb; 580 alloc = cb;
246} 581}
247 582
248static void * 583inline_speed void *
249ev_realloc (void *ptr, long size) 584ev_realloc (void *ptr, long size)
250{ 585{
251 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 586 ptr = alloc (ptr, size);
252 587
253 if (!ptr && size) 588 if (!ptr && size)
254 { 589 {
590#if EV_AVOID_STDIO
591 write (STDERR_FILENO, "libev: memory allocation failed, aborting.",
592 sizeof ("libev: memory allocation failed, aborting.") - 1);
593#else
255 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 594 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
595#endif
256 abort (); 596 abort ();
257 } 597 }
258 598
259 return ptr; 599 return ptr;
260} 600}
… …
262#define ev_malloc(size) ev_realloc (0, (size)) 602#define ev_malloc(size) ev_realloc (0, (size))
263#define ev_free(ptr) ev_realloc ((ptr), 0) 603#define ev_free(ptr) ev_realloc ((ptr), 0)
264 604
265/*****************************************************************************/ 605/*****************************************************************************/
266 606
607/* set in reify when reification needed */
608#define EV_ANFD_REIFY 1
609
610/* file descriptor info structure */
267typedef struct 611typedef struct
268{ 612{
269 WL head; 613 WL head;
270 unsigned char events; 614 unsigned char events; /* the events watched for */
615 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
616 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
271 unsigned char reify; 617 unsigned char unused;
618#if EV_USE_EPOLL
619 unsigned int egen; /* generation counter to counter epoll bugs */
620#endif
272#if EV_SELECT_IS_WINSOCKET 621#if EV_SELECT_IS_WINSOCKET
273 SOCKET handle; 622 SOCKET handle;
274#endif 623#endif
275} ANFD; 624} ANFD;
276 625
626/* stores the pending event set for a given watcher */
277typedef struct 627typedef struct
278{ 628{
279 W w; 629 W w;
280 int events; 630 int events; /* the pending event set for the given watcher */
281} ANPENDING; 631} ANPENDING;
632
633#if EV_USE_INOTIFY
634/* hash table entry per inotify-id */
635typedef struct
636{
637 WL head;
638} ANFS;
639#endif
640
641/* Heap Entry */
642#if EV_HEAP_CACHE_AT
643 /* a heap element */
644 typedef struct {
645 ev_tstamp at;
646 WT w;
647 } ANHE;
648
649 #define ANHE_w(he) (he).w /* access watcher, read-write */
650 #define ANHE_at(he) (he).at /* access cached at, read-only */
651 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
652#else
653 /* a heap element */
654 typedef WT ANHE;
655
656 #define ANHE_w(he) (he)
657 #define ANHE_at(he) (he)->at
658 #define ANHE_at_cache(he)
659#endif
282 660
283#if EV_MULTIPLICITY 661#if EV_MULTIPLICITY
284 662
285 struct ev_loop 663 struct ev_loop
286 { 664 {
… …
304 682
305 static int ev_default_loop_ptr; 683 static int ev_default_loop_ptr;
306 684
307#endif 685#endif
308 686
687#if EV_MINIMAL < 2
688# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
689# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
690# define EV_INVOKE_PENDING invoke_cb (EV_A)
691#else
692# define EV_RELEASE_CB (void)0
693# define EV_ACQUIRE_CB (void)0
694# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
695#endif
696
697#define EVUNLOOP_RECURSE 0x80
698
309/*****************************************************************************/ 699/*****************************************************************************/
310 700
701#ifndef EV_HAVE_EV_TIME
311ev_tstamp 702ev_tstamp
312ev_time (void) 703ev_time (void)
313{ 704{
314#if EV_USE_REALTIME 705#if EV_USE_REALTIME
706 if (expect_true (have_realtime))
707 {
315 struct timespec ts; 708 struct timespec ts;
316 clock_gettime (CLOCK_REALTIME, &ts); 709 clock_gettime (CLOCK_REALTIME, &ts);
317 return ts.tv_sec + ts.tv_nsec * 1e-9; 710 return ts.tv_sec + ts.tv_nsec * 1e-9;
318#else 711 }
712#endif
713
319 struct timeval tv; 714 struct timeval tv;
320 gettimeofday (&tv, 0); 715 gettimeofday (&tv, 0);
321 return tv.tv_sec + tv.tv_usec * 1e-6; 716 return tv.tv_sec + tv.tv_usec * 1e-6;
322#endif
323} 717}
718#endif
324 719
325inline ev_tstamp 720inline_size ev_tstamp
326get_clock (void) 721get_clock (void)
327{ 722{
328#if EV_USE_MONOTONIC 723#if EV_USE_MONOTONIC
329 if (expect_true (have_monotonic)) 724 if (expect_true (have_monotonic))
330 { 725 {
… …
343{ 738{
344 return ev_rt_now; 739 return ev_rt_now;
345} 740}
346#endif 741#endif
347 742
348#define array_roundsize(type,n) (((n) | 4) & ~3) 743void
744ev_sleep (ev_tstamp delay)
745{
746 if (delay > 0.)
747 {
748#if EV_USE_NANOSLEEP
749 struct timespec ts;
750
751 ts.tv_sec = (time_t)delay;
752 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
753
754 nanosleep (&ts, 0);
755#elif defined(_WIN32)
756 Sleep ((unsigned long)(delay * 1e3));
757#else
758 struct timeval tv;
759
760 tv.tv_sec = (time_t)delay;
761 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
762
763 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
764 /* something not guaranteed by newer posix versions, but guaranteed */
765 /* by older ones */
766 select (0, 0, 0, 0, &tv);
767#endif
768 }
769}
770
771/*****************************************************************************/
772
773#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
774
775/* find a suitable new size for the given array, */
776/* hopefully by rounding to a ncie-to-malloc size */
777inline_size int
778array_nextsize (int elem, int cur, int cnt)
779{
780 int ncur = cur + 1;
781
782 do
783 ncur <<= 1;
784 while (cnt > ncur);
785
786 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
787 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
788 {
789 ncur *= elem;
790 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
791 ncur = ncur - sizeof (void *) * 4;
792 ncur /= elem;
793 }
794
795 return ncur;
796}
797
798static noinline void *
799array_realloc (int elem, void *base, int *cur, int cnt)
800{
801 *cur = array_nextsize (elem, *cur, cnt);
802 return ev_realloc (base, elem * *cur);
803}
804
805#define array_init_zero(base,count) \
806 memset ((void *)(base), 0, sizeof (*(base)) * (count))
349 807
350#define array_needsize(type,base,cur,cnt,init) \ 808#define array_needsize(type,base,cur,cnt,init) \
351 if (expect_false ((cnt) > cur)) \ 809 if (expect_false ((cnt) > (cur))) \
352 { \ 810 { \
353 int newcnt = cur; \ 811 int ocur_ = (cur); \
354 do \ 812 (base) = (type *)array_realloc \
355 { \ 813 (sizeof (type), (base), &(cur), (cnt)); \
356 newcnt = array_roundsize (type, newcnt << 1); \ 814 init ((base) + (ocur_), (cur) - ocur_); \
357 } \
358 while ((cnt) > newcnt); \
359 \
360 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
361 init (base + cur, newcnt - cur); \
362 cur = newcnt; \
363 } 815 }
364 816
817#if 0
365#define array_slim(type,stem) \ 818#define array_slim(type,stem) \
366 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 819 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
367 { \ 820 { \
368 stem ## max = array_roundsize (stem ## cnt >> 1); \ 821 stem ## max = array_roundsize (stem ## cnt >> 1); \
369 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 822 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
370 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 823 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
371 } 824 }
825#endif
372 826
373#define array_free(stem, idx) \ 827#define array_free(stem, idx) \
374 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 828 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
375 829
376/*****************************************************************************/ 830/*****************************************************************************/
377 831
378static void 832/* dummy callback for pending events */
379anfds_init (ANFD *base, int count) 833static void noinline
834pendingcb (EV_P_ ev_prepare *w, int revents)
380{ 835{
381 while (count--)
382 {
383 base->head = 0;
384 base->events = EV_NONE;
385 base->reify = 0;
386
387 ++base;
388 }
389} 836}
390 837
391void 838void noinline
392ev_feed_event (EV_P_ void *w, int revents) 839ev_feed_event (EV_P_ void *w, int revents)
393{ 840{
394 W w_ = (W)w; 841 W w_ = (W)w;
842 int pri = ABSPRI (w_);
395 843
396 if (expect_false (w_->pending)) 844 if (expect_false (w_->pending))
845 pendings [pri][w_->pending - 1].events |= revents;
846 else
397 { 847 {
848 w_->pending = ++pendingcnt [pri];
849 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
850 pendings [pri][w_->pending - 1].w = w_;
398 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 851 pendings [pri][w_->pending - 1].events = revents;
399 return;
400 } 852 }
401
402 w_->pending = ++pendingcnt [ABSPRI (w_)];
403 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
404 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
405 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
406} 853}
407 854
408static void 855inline_speed void
856feed_reverse (EV_P_ W w)
857{
858 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
859 rfeeds [rfeedcnt++] = w;
860}
861
862inline_size void
863feed_reverse_done (EV_P_ int revents)
864{
865 do
866 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
867 while (rfeedcnt);
868}
869
870inline_speed void
409queue_events (EV_P_ W *events, int eventcnt, int type) 871queue_events (EV_P_ W *events, int eventcnt, int type)
410{ 872{
411 int i; 873 int i;
412 874
413 for (i = 0; i < eventcnt; ++i) 875 for (i = 0; i < eventcnt; ++i)
414 ev_feed_event (EV_A_ events [i], type); 876 ev_feed_event (EV_A_ events [i], type);
415} 877}
416 878
879/*****************************************************************************/
880
417inline void 881inline_speed void
418fd_event (EV_P_ int fd, int revents) 882fd_event_nc (EV_P_ int fd, int revents)
419{ 883{
420 ANFD *anfd = anfds + fd; 884 ANFD *anfd = anfds + fd;
421 ev_io *w; 885 ev_io *w;
422 886
423 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 887 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
427 if (ev) 891 if (ev)
428 ev_feed_event (EV_A_ (W)w, ev); 892 ev_feed_event (EV_A_ (W)w, ev);
429 } 893 }
430} 894}
431 895
896/* do not submit kernel events for fds that have reify set */
897/* because that means they changed while we were polling for new events */
898inline_speed void
899fd_event (EV_P_ int fd, int revents)
900{
901 ANFD *anfd = anfds + fd;
902
903 if (expect_true (!anfd->reify))
904 fd_event_nc (EV_A_ fd, revents);
905}
906
432void 907void
433ev_feed_fd_event (EV_P_ int fd, int revents) 908ev_feed_fd_event (EV_P_ int fd, int revents)
434{ 909{
910 if (fd >= 0 && fd < anfdmax)
435 fd_event (EV_A_ fd, revents); 911 fd_event_nc (EV_A_ fd, revents);
436} 912}
437 913
438/*****************************************************************************/ 914/* make sure the external fd watch events are in-sync */
439 915/* with the kernel/libev internal state */
440inline void 916inline_size void
441fd_reify (EV_P) 917fd_reify (EV_P)
442{ 918{
443 int i; 919 int i;
444 920
445 for (i = 0; i < fdchangecnt; ++i) 921 for (i = 0; i < fdchangecnt; ++i)
446 { 922 {
447 int fd = fdchanges [i]; 923 int fd = fdchanges [i];
448 ANFD *anfd = anfds + fd; 924 ANFD *anfd = anfds + fd;
449 ev_io *w; 925 ev_io *w;
450 926
451 int events = 0; 927 unsigned char events = 0;
452 928
453 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 929 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
454 events |= w->events; 930 events |= (unsigned char)w->events;
455 931
456#if EV_SELECT_IS_WINSOCKET 932#if EV_SELECT_IS_WINSOCKET
457 if (events) 933 if (events)
458 { 934 {
459 unsigned long argp; 935 unsigned long arg;
460 anfd->handle = _get_osfhandle (fd); 936 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
461 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 937 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
462 } 938 }
463#endif 939#endif
464 940
941 {
942 unsigned char o_events = anfd->events;
943 unsigned char o_reify = anfd->reify;
944
465 anfd->reify = 0; 945 anfd->reify = 0;
466
467 backend_modify (EV_A_ fd, anfd->events, events);
468 anfd->events = events; 946 anfd->events = events;
947
948 if (o_events != events || o_reify & EV__IOFDSET)
949 backend_modify (EV_A_ fd, o_events, events);
950 }
469 } 951 }
470 952
471 fdchangecnt = 0; 953 fdchangecnt = 0;
472} 954}
473 955
474static void 956/* something about the given fd changed */
957inline_size void
475fd_change (EV_P_ int fd) 958fd_change (EV_P_ int fd, int flags)
476{ 959{
477 if (expect_false (anfds [fd].reify)) 960 unsigned char reify = anfds [fd].reify;
478 return;
479
480 anfds [fd].reify = 1; 961 anfds [fd].reify |= flags;
481 962
963 if (expect_true (!reify))
964 {
482 ++fdchangecnt; 965 ++fdchangecnt;
483 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 966 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
484 fdchanges [fdchangecnt - 1] = fd; 967 fdchanges [fdchangecnt - 1] = fd;
968 }
485} 969}
486 970
487static void 971/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
972inline_speed void
488fd_kill (EV_P_ int fd) 973fd_kill (EV_P_ int fd)
489{ 974{
490 ev_io *w; 975 ev_io *w;
491 976
492 while ((w = (ev_io *)anfds [fd].head)) 977 while ((w = (ev_io *)anfds [fd].head))
… …
494 ev_io_stop (EV_A_ w); 979 ev_io_stop (EV_A_ w);
495 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 980 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
496 } 981 }
497} 982}
498 983
984/* check whether the given fd is atcually valid, for error recovery */
499inline int 985inline_size int
500fd_valid (int fd) 986fd_valid (int fd)
501{ 987{
502#ifdef _WIN32 988#ifdef _WIN32
503 return _get_osfhandle (fd) != -1; 989 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
504#else 990#else
505 return fcntl (fd, F_GETFD) != -1; 991 return fcntl (fd, F_GETFD) != -1;
506#endif 992#endif
507} 993}
508 994
509/* called on EBADF to verify fds */ 995/* called on EBADF to verify fds */
510static void 996static void noinline
511fd_ebadf (EV_P) 997fd_ebadf (EV_P)
512{ 998{
513 int fd; 999 int fd;
514 1000
515 for (fd = 0; fd < anfdmax; ++fd) 1001 for (fd = 0; fd < anfdmax; ++fd)
516 if (anfds [fd].events) 1002 if (anfds [fd].events)
517 if (!fd_valid (fd) == -1 && errno == EBADF) 1003 if (!fd_valid (fd) && errno == EBADF)
518 fd_kill (EV_A_ fd); 1004 fd_kill (EV_A_ fd);
519} 1005}
520 1006
521/* called on ENOMEM in select/poll to kill some fds and retry */ 1007/* called on ENOMEM in select/poll to kill some fds and retry */
522static void 1008static void noinline
523fd_enomem (EV_P) 1009fd_enomem (EV_P)
524{ 1010{
525 int fd; 1011 int fd;
526 1012
527 for (fd = anfdmax; fd--; ) 1013 for (fd = anfdmax; fd--; )
528 if (anfds [fd].events) 1014 if (anfds [fd].events)
529 { 1015 {
530 fd_kill (EV_A_ fd); 1016 fd_kill (EV_A_ fd);
531 return; 1017 break;
532 } 1018 }
533} 1019}
534 1020
535/* usually called after fork if backend needs to re-arm all fds from scratch */ 1021/* usually called after fork if backend needs to re-arm all fds from scratch */
536static void 1022static void noinline
537fd_rearm_all (EV_P) 1023fd_rearm_all (EV_P)
538{ 1024{
539 int fd; 1025 int fd;
540 1026
541 /* this should be highly optimised to not do anything but set a flag */
542 for (fd = 0; fd < anfdmax; ++fd) 1027 for (fd = 0; fd < anfdmax; ++fd)
543 if (anfds [fd].events) 1028 if (anfds [fd].events)
544 { 1029 {
545 anfds [fd].events = 0; 1030 anfds [fd].events = 0;
546 fd_change (EV_A_ fd); 1031 anfds [fd].emask = 0;
1032 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
547 } 1033 }
548} 1034}
549 1035
550/*****************************************************************************/ 1036/*****************************************************************************/
551 1037
552static void 1038/*
553upheap (WT *heap, int k) 1039 * the heap functions want a real array index. array index 0 uis guaranteed to not
554{ 1040 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
555 WT w = heap [k]; 1041 * the branching factor of the d-tree.
1042 */
556 1043
557 while (k && heap [k >> 1]->at > w->at) 1044/*
558 { 1045 * at the moment we allow libev the luxury of two heaps,
559 heap [k] = heap [k >> 1]; 1046 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
560 ((W)heap [k])->active = k + 1; 1047 * which is more cache-efficient.
561 k >>= 1; 1048 * the difference is about 5% with 50000+ watchers.
562 } 1049 */
1050#if EV_USE_4HEAP
563 1051
564 heap [k] = w; 1052#define DHEAP 4
565 ((W)heap [k])->active = k + 1; 1053#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1054#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1055#define UPHEAP_DONE(p,k) ((p) == (k))
566 1056
567} 1057/* away from the root */
568 1058inline_speed void
569static void
570downheap (WT *heap, int N, int k) 1059downheap (ANHE *heap, int N, int k)
571{ 1060{
572 WT w = heap [k]; 1061 ANHE he = heap [k];
1062 ANHE *E = heap + N + HEAP0;
573 1063
574 while (k < (N >> 1)) 1064 for (;;)
575 { 1065 {
576 int j = k << 1; 1066 ev_tstamp minat;
1067 ANHE *minpos;
1068 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
577 1069
578 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 1070 /* find minimum child */
1071 if (expect_true (pos + DHEAP - 1 < E))
579 ++j; 1072 {
580 1073 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
581 if (w->at <= heap [j]->at) 1074 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1075 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1076 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1077 }
1078 else if (pos < E)
1079 {
1080 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1081 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1082 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1083 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1084 }
1085 else
582 break; 1086 break;
583 1087
1088 if (ANHE_at (he) <= minat)
1089 break;
1090
1091 heap [k] = *minpos;
1092 ev_active (ANHE_w (*minpos)) = k;
1093
1094 k = minpos - heap;
1095 }
1096
1097 heap [k] = he;
1098 ev_active (ANHE_w (he)) = k;
1099}
1100
1101#else /* 4HEAP */
1102
1103#define HEAP0 1
1104#define HPARENT(k) ((k) >> 1)
1105#define UPHEAP_DONE(p,k) (!(p))
1106
1107/* away from the root */
1108inline_speed void
1109downheap (ANHE *heap, int N, int k)
1110{
1111 ANHE he = heap [k];
1112
1113 for (;;)
1114 {
1115 int c = k << 1;
1116
1117 if (c >= N + HEAP0)
1118 break;
1119
1120 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1121 ? 1 : 0;
1122
1123 if (ANHE_at (he) <= ANHE_at (heap [c]))
1124 break;
1125
584 heap [k] = heap [j]; 1126 heap [k] = heap [c];
585 ((W)heap [k])->active = k + 1; 1127 ev_active (ANHE_w (heap [k])) = k;
1128
586 k = j; 1129 k = c;
587 } 1130 }
588 1131
589 heap [k] = w; 1132 heap [k] = he;
590 ((W)heap [k])->active = k + 1; 1133 ev_active (ANHE_w (he)) = k;
591} 1134}
1135#endif
592 1136
1137/* towards the root */
1138inline_speed void
1139upheap (ANHE *heap, int k)
1140{
1141 ANHE he = heap [k];
1142
1143 for (;;)
1144 {
1145 int p = HPARENT (k);
1146
1147 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1148 break;
1149
1150 heap [k] = heap [p];
1151 ev_active (ANHE_w (heap [k])) = k;
1152 k = p;
1153 }
1154
1155 heap [k] = he;
1156 ev_active (ANHE_w (he)) = k;
1157}
1158
1159/* move an element suitably so it is in a correct place */
593inline void 1160inline_size void
594adjustheap (WT *heap, int N, int k) 1161adjustheap (ANHE *heap, int N, int k)
595{ 1162{
1163 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
596 upheap (heap, k); 1164 upheap (heap, k);
1165 else
597 downheap (heap, N, k); 1166 downheap (heap, N, k);
1167}
1168
1169/* rebuild the heap: this function is used only once and executed rarely */
1170inline_size void
1171reheap (ANHE *heap, int N)
1172{
1173 int i;
1174
1175 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1176 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1177 for (i = 0; i < N; ++i)
1178 upheap (heap, i + HEAP0);
598} 1179}
599 1180
600/*****************************************************************************/ 1181/*****************************************************************************/
601 1182
1183/* associate signal watchers to a signal signal */
602typedef struct 1184typedef struct
603{ 1185{
1186 EV_ATOMIC_T pending;
1187#if EV_MULTIPLICITY
1188 EV_P;
1189#endif
604 WL head; 1190 WL head;
605 sig_atomic_t volatile gotsig;
606} ANSIG; 1191} ANSIG;
607 1192
608static ANSIG *signals; 1193static ANSIG signals [EV_NSIG - 1];
609static int signalmax;
610 1194
611static int sigpipe [2]; 1195/*****************************************************************************/
612static sig_atomic_t volatile gotsig;
613static ev_io sigev;
614 1196
615static void 1197/* used to prepare libev internal fd's */
616signals_init (ANSIG *base, int count) 1198/* this is not fork-safe */
617{ 1199inline_speed void
618 while (count--)
619 {
620 base->head = 0;
621 base->gotsig = 0;
622
623 ++base;
624 }
625}
626
627static void
628sighandler (int signum)
629{
630#if _WIN32
631 signal (signum, sighandler);
632#endif
633
634 signals [signum - 1].gotsig = 1;
635
636 if (!gotsig)
637 {
638 int old_errno = errno;
639 gotsig = 1;
640 write (sigpipe [1], &signum, 1);
641 errno = old_errno;
642 }
643}
644
645void
646ev_feed_signal_event (EV_P_ int signum)
647{
648 WL w;
649
650#if EV_MULTIPLICITY
651 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
652#endif
653
654 --signum;
655
656 if (signum < 0 || signum >= signalmax)
657 return;
658
659 signals [signum].gotsig = 0;
660
661 for (w = signals [signum].head; w; w = w->next)
662 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
663}
664
665static void
666sigcb (EV_P_ ev_io *iow, int revents)
667{
668 int signum;
669
670 read (sigpipe [0], &revents, 1);
671 gotsig = 0;
672
673 for (signum = signalmax; signum--; )
674 if (signals [signum].gotsig)
675 ev_feed_signal_event (EV_A_ signum + 1);
676}
677
678static void
679fd_intern (int fd) 1200fd_intern (int fd)
680{ 1201{
681#ifdef _WIN32 1202#ifdef _WIN32
682 int arg = 1; 1203 unsigned long arg = 1;
683 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1204 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
684#else 1205#else
685 fcntl (fd, F_SETFD, FD_CLOEXEC); 1206 fcntl (fd, F_SETFD, FD_CLOEXEC);
686 fcntl (fd, F_SETFL, O_NONBLOCK); 1207 fcntl (fd, F_SETFL, O_NONBLOCK);
687#endif 1208#endif
688} 1209}
689 1210
1211static void noinline
1212evpipe_init (EV_P)
1213{
1214 if (!ev_is_active (&pipe_w))
1215 {
1216#if EV_USE_EVENTFD
1217 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1218 if (evfd < 0 && errno == EINVAL)
1219 evfd = eventfd (0, 0);
1220
1221 if (evfd >= 0)
1222 {
1223 evpipe [0] = -1;
1224 fd_intern (evfd); /* doing it twice doesn't hurt */
1225 ev_io_set (&pipe_w, evfd, EV_READ);
1226 }
1227 else
1228#endif
1229 {
1230 while (pipe (evpipe))
1231 ev_syserr ("(libev) error creating signal/async pipe");
1232
1233 fd_intern (evpipe [0]);
1234 fd_intern (evpipe [1]);
1235 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1236 }
1237
1238 ev_io_start (EV_A_ &pipe_w);
1239 ev_unref (EV_A); /* watcher should not keep loop alive */
1240 }
1241}
1242
1243inline_size void
1244evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1245{
1246 if (!*flag)
1247 {
1248 int old_errno = errno; /* save errno because write might clobber it */
1249
1250 *flag = 1;
1251
1252#if EV_USE_EVENTFD
1253 if (evfd >= 0)
1254 {
1255 uint64_t counter = 1;
1256 write (evfd, &counter, sizeof (uint64_t));
1257 }
1258 else
1259#endif
1260 write (evpipe [1], &old_errno, 1);
1261
1262 errno = old_errno;
1263 }
1264}
1265
1266/* called whenever the libev signal pipe */
1267/* got some events (signal, async) */
690static void 1268static void
691siginit (EV_P) 1269pipecb (EV_P_ ev_io *iow, int revents)
692{ 1270{
693 fd_intern (sigpipe [0]); 1271 int i;
694 fd_intern (sigpipe [1]);
695 1272
696 ev_io_set (&sigev, sigpipe [0], EV_READ); 1273#if EV_USE_EVENTFD
697 ev_io_start (EV_A_ &sigev); 1274 if (evfd >= 0)
698 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1275 {
1276 uint64_t counter;
1277 read (evfd, &counter, sizeof (uint64_t));
1278 }
1279 else
1280#endif
1281 {
1282 char dummy;
1283 read (evpipe [0], &dummy, 1);
1284 }
1285
1286 if (sig_pending)
1287 {
1288 sig_pending = 0;
1289
1290 for (i = EV_NSIG - 1; i--; )
1291 if (expect_false (signals [i].pending))
1292 ev_feed_signal_event (EV_A_ i + 1);
1293 }
1294
1295#if EV_ASYNC_ENABLE
1296 if (async_pending)
1297 {
1298 async_pending = 0;
1299
1300 for (i = asynccnt; i--; )
1301 if (asyncs [i]->sent)
1302 {
1303 asyncs [i]->sent = 0;
1304 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1305 }
1306 }
1307#endif
699} 1308}
700 1309
701/*****************************************************************************/ 1310/*****************************************************************************/
702 1311
1312static void
1313ev_sighandler (int signum)
1314{
1315#if EV_MULTIPLICITY
1316 EV_P = signals [signum - 1].loop;
1317#endif
1318
1319#ifdef _WIN32
1320 signal (signum, ev_sighandler);
1321#endif
1322
1323 signals [signum - 1].pending = 1;
1324 evpipe_write (EV_A_ &sig_pending);
1325}
1326
1327void noinline
1328ev_feed_signal_event (EV_P_ int signum)
1329{
1330 WL w;
1331
1332 if (expect_false (signum <= 0 || signum > EV_NSIG))
1333 return;
1334
1335 --signum;
1336
1337#if EV_MULTIPLICITY
1338 /* it is permissible to try to feed a signal to the wrong loop */
1339 /* or, likely more useful, feeding a signal nobody is waiting for */
1340
1341 if (expect_false (signals [signum].loop != EV_A))
1342 return;
1343#endif
1344
1345 signals [signum].pending = 0;
1346
1347 for (w = signals [signum].head; w; w = w->next)
1348 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1349}
1350
1351#if EV_USE_SIGNALFD
1352static void
1353sigfdcb (EV_P_ ev_io *iow, int revents)
1354{
1355 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1356
1357 for (;;)
1358 {
1359 ssize_t res = read (sigfd, si, sizeof (si));
1360
1361 /* not ISO-C, as res might be -1, but works with SuS */
1362 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1363 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1364
1365 if (res < (ssize_t)sizeof (si))
1366 break;
1367 }
1368}
1369#endif
1370
1371/*****************************************************************************/
1372
703static ev_child *childs [PID_HASHSIZE]; 1373static WL childs [EV_PID_HASHSIZE];
704 1374
705#ifndef _WIN32 1375#ifndef _WIN32
706 1376
707static ev_signal childev; 1377static ev_signal childev;
1378
1379#ifndef WIFCONTINUED
1380# define WIFCONTINUED(status) 0
1381#endif
1382
1383/* handle a single child status event */
1384inline_speed void
1385child_reap (EV_P_ int chain, int pid, int status)
1386{
1387 ev_child *w;
1388 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1389
1390 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1391 {
1392 if ((w->pid == pid || !w->pid)
1393 && (!traced || (w->flags & 1)))
1394 {
1395 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1396 w->rpid = pid;
1397 w->rstatus = status;
1398 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1399 }
1400 }
1401}
708 1402
709#ifndef WCONTINUED 1403#ifndef WCONTINUED
710# define WCONTINUED 0 1404# define WCONTINUED 0
711#endif 1405#endif
712 1406
713static void 1407/* called on sigchld etc., calls waitpid */
714child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
715{
716 ev_child *w;
717
718 for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
719 if (w->pid == pid || !w->pid)
720 {
721 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
722 w->rpid = pid;
723 w->rstatus = status;
724 ev_feed_event (EV_A_ (W)w, EV_CHILD);
725 }
726}
727
728static void 1408static void
729childcb (EV_P_ ev_signal *sw, int revents) 1409childcb (EV_P_ ev_signal *sw, int revents)
730{ 1410{
731 int pid, status; 1411 int pid, status;
732 1412
1413 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
733 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 1414 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
734 { 1415 if (!WCONTINUED
1416 || errno != EINVAL
1417 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1418 return;
1419
735 /* make sure we are called again until all childs have been reaped */ 1420 /* make sure we are called again until all children have been reaped */
736 /* we need to do it this way so that the callback gets called before we continue */ 1421 /* we need to do it this way so that the callback gets called before we continue */
737 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 1422 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
738 1423
739 child_reap (EV_A_ sw, pid, pid, status); 1424 child_reap (EV_A_ pid, pid, status);
1425 if (EV_PID_HASHSIZE > 1)
740 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 1426 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
741 }
742} 1427}
743 1428
744#endif 1429#endif
745 1430
746/*****************************************************************************/ 1431/*****************************************************************************/
… …
772{ 1457{
773 return EV_VERSION_MINOR; 1458 return EV_VERSION_MINOR;
774} 1459}
775 1460
776/* return true if we are running with elevated privileges and should ignore env variables */ 1461/* return true if we are running with elevated privileges and should ignore env variables */
777static int 1462int inline_size
778enable_secure (void) 1463enable_secure (void)
779{ 1464{
780#ifdef _WIN32 1465#ifdef _WIN32
781 return 0; 1466 return 0;
782#else 1467#else
… …
808 /* kqueue is borked on everything but netbsd apparently */ 1493 /* kqueue is borked on everything but netbsd apparently */
809 /* it usually doesn't work correctly on anything but sockets and pipes */ 1494 /* it usually doesn't work correctly on anything but sockets and pipes */
810 flags &= ~EVBACKEND_KQUEUE; 1495 flags &= ~EVBACKEND_KQUEUE;
811#endif 1496#endif
812#ifdef __APPLE__ 1497#ifdef __APPLE__
813 // flags &= ~EVBACKEND_KQUEUE; for documentation 1498 /* only select works correctly on that "unix-certified" platform */
814 flags &= ~EVBACKEND_POLL; 1499 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1500 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
815#endif 1501#endif
816 1502
817 return flags; 1503 return flags;
818} 1504}
819 1505
820unsigned int 1506unsigned int
821ev_embeddable_backends (void) 1507ev_embeddable_backends (void)
822{ 1508{
823 return EVBACKEND_EPOLL 1509 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
824 | EVBACKEND_KQUEUE 1510
825 | EVBACKEND_PORT; 1511 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1512 /* please fix it and tell me how to detect the fix */
1513 flags &= ~EVBACKEND_EPOLL;
1514
1515 return flags;
826} 1516}
827 1517
828unsigned int 1518unsigned int
829ev_backend (EV_P) 1519ev_backend (EV_P)
830{ 1520{
831 return backend; 1521 return backend;
832} 1522}
833 1523
834static void 1524#if EV_MINIMAL < 2
1525unsigned int
1526ev_loop_count (EV_P)
1527{
1528 return loop_count;
1529}
1530
1531unsigned int
1532ev_loop_depth (EV_P)
1533{
1534 return loop_depth;
1535}
1536
1537void
1538ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1539{
1540 io_blocktime = interval;
1541}
1542
1543void
1544ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1545{
1546 timeout_blocktime = interval;
1547}
1548
1549void
1550ev_set_userdata (EV_P_ void *data)
1551{
1552 userdata = data;
1553}
1554
1555void *
1556ev_userdata (EV_P)
1557{
1558 return userdata;
1559}
1560
1561void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1562{
1563 invoke_cb = invoke_pending_cb;
1564}
1565
1566void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1567{
1568 release_cb = release;
1569 acquire_cb = acquire;
1570}
1571#endif
1572
1573/* initialise a loop structure, must be zero-initialised */
1574static void noinline
835loop_init (EV_P_ unsigned int flags) 1575loop_init (EV_P_ unsigned int flags)
836{ 1576{
837 if (!backend) 1577 if (!backend)
838 { 1578 {
1579#if EV_USE_REALTIME
1580 if (!have_realtime)
1581 {
1582 struct timespec ts;
1583
1584 if (!clock_gettime (CLOCK_REALTIME, &ts))
1585 have_realtime = 1;
1586 }
1587#endif
1588
839#if EV_USE_MONOTONIC 1589#if EV_USE_MONOTONIC
1590 if (!have_monotonic)
840 { 1591 {
841 struct timespec ts; 1592 struct timespec ts;
1593
842 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1594 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
843 have_monotonic = 1; 1595 have_monotonic = 1;
844 } 1596 }
845#endif 1597#endif
846 1598
847 ev_rt_now = ev_time (); 1599 /* pid check not overridable via env */
848 mn_now = get_clock (); 1600#ifndef _WIN32
849 now_floor = mn_now; 1601 if (flags & EVFLAG_FORKCHECK)
850 rtmn_diff = ev_rt_now - mn_now; 1602 curpid = getpid ();
1603#endif
851 1604
852 if (!(flags & EVFLAG_NOENV) 1605 if (!(flags & EVFLAG_NOENV)
853 && !enable_secure () 1606 && !enable_secure ()
854 && getenv ("LIBEV_FLAGS")) 1607 && getenv ("LIBEV_FLAGS"))
855 flags = atoi (getenv ("LIBEV_FLAGS")); 1608 flags = atoi (getenv ("LIBEV_FLAGS"));
856 1609
1610 ev_rt_now = ev_time ();
1611 mn_now = get_clock ();
1612 now_floor = mn_now;
1613 rtmn_diff = ev_rt_now - mn_now;
1614#if EV_MINIMAL < 2
1615 invoke_cb = ev_invoke_pending;
1616#endif
1617
1618 io_blocktime = 0.;
1619 timeout_blocktime = 0.;
1620 backend = 0;
1621 backend_fd = -1;
1622 sig_pending = 0;
1623#if EV_ASYNC_ENABLE
1624 async_pending = 0;
1625#endif
1626#if EV_USE_INOTIFY
1627 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1628#endif
1629#if EV_USE_SIGNALFD
1630 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1631#endif
1632
857 if (!(flags & 0x0000ffffUL)) 1633 if (!(flags & 0x0000ffffU))
858 flags |= ev_recommended_backends (); 1634 flags |= ev_recommended_backends ();
859 1635
860 backend = 0;
861#if EV_USE_PORT 1636#if EV_USE_PORT
862 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 1637 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
863#endif 1638#endif
864#if EV_USE_KQUEUE 1639#if EV_USE_KQUEUE
865 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 1640 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
872#endif 1647#endif
873#if EV_USE_SELECT 1648#if EV_USE_SELECT
874 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 1649 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
875#endif 1650#endif
876 1651
1652 ev_prepare_init (&pending_w, pendingcb);
1653
877 ev_init (&sigev, sigcb); 1654 ev_init (&pipe_w, pipecb);
878 ev_set_priority (&sigev, EV_MAXPRI); 1655 ev_set_priority (&pipe_w, EV_MAXPRI);
879 } 1656 }
880} 1657}
881 1658
882static void 1659/* free up a loop structure */
1660static void noinline
883loop_destroy (EV_P) 1661loop_destroy (EV_P)
884{ 1662{
885 int i; 1663 int i;
1664
1665 if (ev_is_active (&pipe_w))
1666 {
1667 /*ev_ref (EV_A);*/
1668 /*ev_io_stop (EV_A_ &pipe_w);*/
1669
1670#if EV_USE_EVENTFD
1671 if (evfd >= 0)
1672 close (evfd);
1673#endif
1674
1675 if (evpipe [0] >= 0)
1676 {
1677 EV_WIN32_CLOSE_FD (evpipe [0]);
1678 EV_WIN32_CLOSE_FD (evpipe [1]);
1679 }
1680 }
1681
1682#if EV_USE_SIGNALFD
1683 if (ev_is_active (&sigfd_w))
1684 close (sigfd);
1685#endif
1686
1687#if EV_USE_INOTIFY
1688 if (fs_fd >= 0)
1689 close (fs_fd);
1690#endif
1691
1692 if (backend_fd >= 0)
1693 close (backend_fd);
886 1694
887#if EV_USE_PORT 1695#if EV_USE_PORT
888 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 1696 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
889#endif 1697#endif
890#if EV_USE_KQUEUE 1698#if EV_USE_KQUEUE
… …
899#if EV_USE_SELECT 1707#if EV_USE_SELECT
900 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 1708 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
901#endif 1709#endif
902 1710
903 for (i = NUMPRI; i--; ) 1711 for (i = NUMPRI; i--; )
1712 {
904 array_free (pending, [i]); 1713 array_free (pending, [i]);
1714#if EV_IDLE_ENABLE
1715 array_free (idle, [i]);
1716#endif
1717 }
1718
1719 ev_free (anfds); anfds = 0; anfdmax = 0;
905 1720
906 /* have to use the microsoft-never-gets-it-right macro */ 1721 /* have to use the microsoft-never-gets-it-right macro */
1722 array_free (rfeed, EMPTY);
907 array_free (fdchange, EMPTY0); 1723 array_free (fdchange, EMPTY);
908 array_free (timer, EMPTY0); 1724 array_free (timer, EMPTY);
909#if EV_PERIODICS 1725#if EV_PERIODIC_ENABLE
910 array_free (periodic, EMPTY0); 1726 array_free (periodic, EMPTY);
911#endif 1727#endif
1728#if EV_FORK_ENABLE
912 array_free (idle, EMPTY0); 1729 array_free (fork, EMPTY);
1730#endif
913 array_free (prepare, EMPTY0); 1731 array_free (prepare, EMPTY);
914 array_free (check, EMPTY0); 1732 array_free (check, EMPTY);
1733#if EV_ASYNC_ENABLE
1734 array_free (async, EMPTY);
1735#endif
915 1736
916 backend = 0; 1737 backend = 0;
917} 1738}
918 1739
919static void 1740#if EV_USE_INOTIFY
1741inline_size void infy_fork (EV_P);
1742#endif
1743
1744inline_size void
920loop_fork (EV_P) 1745loop_fork (EV_P)
921{ 1746{
922#if EV_USE_PORT 1747#if EV_USE_PORT
923 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 1748 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
924#endif 1749#endif
… …
926 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 1751 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
927#endif 1752#endif
928#if EV_USE_EPOLL 1753#if EV_USE_EPOLL
929 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 1754 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
930#endif 1755#endif
1756#if EV_USE_INOTIFY
1757 infy_fork (EV_A);
1758#endif
931 1759
932 if (ev_is_active (&sigev)) 1760 if (ev_is_active (&pipe_w))
933 { 1761 {
934 /* default loop */ 1762 /* this "locks" the handlers against writing to the pipe */
1763 /* while we modify the fd vars */
1764 sig_pending = 1;
1765#if EV_ASYNC_ENABLE
1766 async_pending = 1;
1767#endif
935 1768
936 ev_ref (EV_A); 1769 ev_ref (EV_A);
937 ev_io_stop (EV_A_ &sigev); 1770 ev_io_stop (EV_A_ &pipe_w);
938 close (sigpipe [0]);
939 close (sigpipe [1]);
940 1771
941 while (pipe (sigpipe)) 1772#if EV_USE_EVENTFD
942 syserr ("(libev) error creating pipe"); 1773 if (evfd >= 0)
1774 close (evfd);
1775#endif
943 1776
1777 if (evpipe [0] >= 0)
1778 {
1779 EV_WIN32_CLOSE_FD (evpipe [0]);
1780 EV_WIN32_CLOSE_FD (evpipe [1]);
1781 }
1782
944 siginit (EV_A); 1783 evpipe_init (EV_A);
1784 /* now iterate over everything, in case we missed something */
1785 pipecb (EV_A_ &pipe_w, EV_READ);
945 } 1786 }
946 1787
947 postfork = 0; 1788 postfork = 0;
948} 1789}
949 1790
950#if EV_MULTIPLICITY 1791#if EV_MULTIPLICITY
1792
951struct ev_loop * 1793struct ev_loop *
952ev_loop_new (unsigned int flags) 1794ev_loop_new (unsigned int flags)
953{ 1795{
954 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 1796 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
955 1797
956 memset (loop, 0, sizeof (struct ev_loop)); 1798 memset (EV_A, 0, sizeof (struct ev_loop));
957
958 loop_init (EV_A_ flags); 1799 loop_init (EV_A_ flags);
959 1800
960 if (ev_backend (EV_A)) 1801 if (ev_backend (EV_A))
961 return loop; 1802 return EV_A;
962 1803
963 return 0; 1804 return 0;
964} 1805}
965 1806
966void 1807void
… …
971} 1812}
972 1813
973void 1814void
974ev_loop_fork (EV_P) 1815ev_loop_fork (EV_P)
975{ 1816{
976 postfork = 1; 1817 postfork = 1; /* must be in line with ev_default_fork */
977} 1818}
1819#endif /* multiplicity */
978 1820
1821#if EV_VERIFY
1822static void noinline
1823verify_watcher (EV_P_ W w)
1824{
1825 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1826
1827 if (w->pending)
1828 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1829}
1830
1831static void noinline
1832verify_heap (EV_P_ ANHE *heap, int N)
1833{
1834 int i;
1835
1836 for (i = HEAP0; i < N + HEAP0; ++i)
1837 {
1838 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1839 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1840 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1841
1842 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1843 }
1844}
1845
1846static void noinline
1847array_verify (EV_P_ W *ws, int cnt)
1848{
1849 while (cnt--)
1850 {
1851 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1852 verify_watcher (EV_A_ ws [cnt]);
1853 }
1854}
1855#endif
1856
1857#if EV_MINIMAL < 2
1858void
1859ev_loop_verify (EV_P)
1860{
1861#if EV_VERIFY
1862 int i;
1863 WL w;
1864
1865 assert (activecnt >= -1);
1866
1867 assert (fdchangemax >= fdchangecnt);
1868 for (i = 0; i < fdchangecnt; ++i)
1869 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1870
1871 assert (anfdmax >= 0);
1872 for (i = 0; i < anfdmax; ++i)
1873 for (w = anfds [i].head; w; w = w->next)
1874 {
1875 verify_watcher (EV_A_ (W)w);
1876 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1877 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1878 }
1879
1880 assert (timermax >= timercnt);
1881 verify_heap (EV_A_ timers, timercnt);
1882
1883#if EV_PERIODIC_ENABLE
1884 assert (periodicmax >= periodiccnt);
1885 verify_heap (EV_A_ periodics, periodiccnt);
1886#endif
1887
1888 for (i = NUMPRI; i--; )
1889 {
1890 assert (pendingmax [i] >= pendingcnt [i]);
1891#if EV_IDLE_ENABLE
1892 assert (idleall >= 0);
1893 assert (idlemax [i] >= idlecnt [i]);
1894 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1895#endif
1896 }
1897
1898#if EV_FORK_ENABLE
1899 assert (forkmax >= forkcnt);
1900 array_verify (EV_A_ (W *)forks, forkcnt);
1901#endif
1902
1903#if EV_ASYNC_ENABLE
1904 assert (asyncmax >= asynccnt);
1905 array_verify (EV_A_ (W *)asyncs, asynccnt);
1906#endif
1907
1908 assert (preparemax >= preparecnt);
1909 array_verify (EV_A_ (W *)prepares, preparecnt);
1910
1911 assert (checkmax >= checkcnt);
1912 array_verify (EV_A_ (W *)checks, checkcnt);
1913
1914# if 0
1915 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1916 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
1917# endif
1918#endif
1919}
979#endif 1920#endif
980 1921
981#if EV_MULTIPLICITY 1922#if EV_MULTIPLICITY
982struct ev_loop * 1923struct ev_loop *
983ev_default_loop_init (unsigned int flags) 1924ev_default_loop_init (unsigned int flags)
984#else 1925#else
985int 1926int
986ev_default_loop (unsigned int flags) 1927ev_default_loop (unsigned int flags)
987#endif 1928#endif
988{ 1929{
989 if (sigpipe [0] == sigpipe [1])
990 if (pipe (sigpipe))
991 return 0;
992
993 if (!ev_default_loop_ptr) 1930 if (!ev_default_loop_ptr)
994 { 1931 {
995#if EV_MULTIPLICITY 1932#if EV_MULTIPLICITY
996 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 1933 EV_P = ev_default_loop_ptr = &default_loop_struct;
997#else 1934#else
998 ev_default_loop_ptr = 1; 1935 ev_default_loop_ptr = 1;
999#endif 1936#endif
1000 1937
1001 loop_init (EV_A_ flags); 1938 loop_init (EV_A_ flags);
1002 1939
1003 if (ev_backend (EV_A)) 1940 if (ev_backend (EV_A))
1004 { 1941 {
1005 siginit (EV_A);
1006
1007#ifndef _WIN32 1942#ifndef _WIN32
1008 ev_signal_init (&childev, childcb, SIGCHLD); 1943 ev_signal_init (&childev, childcb, SIGCHLD);
1009 ev_set_priority (&childev, EV_MAXPRI); 1944 ev_set_priority (&childev, EV_MAXPRI);
1010 ev_signal_start (EV_A_ &childev); 1945 ev_signal_start (EV_A_ &childev);
1011 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1946 ev_unref (EV_A); /* child watcher should not keep loop alive */
… …
1020 1955
1021void 1956void
1022ev_default_destroy (void) 1957ev_default_destroy (void)
1023{ 1958{
1024#if EV_MULTIPLICITY 1959#if EV_MULTIPLICITY
1025 struct ev_loop *loop = ev_default_loop_ptr; 1960 EV_P = ev_default_loop_ptr;
1026#endif 1961#endif
1962
1963 ev_default_loop_ptr = 0;
1027 1964
1028#ifndef _WIN32 1965#ifndef _WIN32
1029 ev_ref (EV_A); /* child watcher */ 1966 ev_ref (EV_A); /* child watcher */
1030 ev_signal_stop (EV_A_ &childev); 1967 ev_signal_stop (EV_A_ &childev);
1031#endif 1968#endif
1032 1969
1033 ev_ref (EV_A); /* signal watcher */
1034 ev_io_stop (EV_A_ &sigev);
1035
1036 close (sigpipe [0]); sigpipe [0] = 0;
1037 close (sigpipe [1]); sigpipe [1] = 0;
1038
1039 loop_destroy (EV_A); 1970 loop_destroy (EV_A);
1040} 1971}
1041 1972
1042void 1973void
1043ev_default_fork (void) 1974ev_default_fork (void)
1044{ 1975{
1045#if EV_MULTIPLICITY 1976#if EV_MULTIPLICITY
1046 struct ev_loop *loop = ev_default_loop_ptr; 1977 EV_P = ev_default_loop_ptr;
1047#endif 1978#endif
1048 1979
1049 if (backend) 1980 postfork = 1; /* must be in line with ev_loop_fork */
1050 postfork = 1;
1051} 1981}
1052 1982
1053/*****************************************************************************/ 1983/*****************************************************************************/
1054 1984
1055static int 1985void
1056any_pending (EV_P) 1986ev_invoke (EV_P_ void *w, int revents)
1987{
1988 EV_CB_INVOKE ((W)w, revents);
1989}
1990
1991unsigned int
1992ev_pending_count (EV_P)
1057{ 1993{
1058 int pri; 1994 int pri;
1995 unsigned int count = 0;
1059 1996
1060 for (pri = NUMPRI; pri--; ) 1997 for (pri = NUMPRI; pri--; )
1061 if (pendingcnt [pri]) 1998 count += pendingcnt [pri];
1062 return 1;
1063 1999
1064 return 0; 2000 return count;
1065} 2001}
1066 2002
1067inline void 2003void noinline
1068call_pending (EV_P) 2004ev_invoke_pending (EV_P)
1069{ 2005{
1070 int pri; 2006 int pri;
1071 2007
1072 for (pri = NUMPRI; pri--; ) 2008 for (pri = NUMPRI; pri--; )
1073 while (pendingcnt [pri]) 2009 while (pendingcnt [pri])
1074 { 2010 {
1075 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2011 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1076 2012
1077 if (expect_true (p->w))
1078 {
1079 assert (("non-pending watcher on pending list", p->w->pending)); 2013 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2014 /* ^ this is no longer true, as pending_w could be here */
1080 2015
1081 p->w->pending = 0; 2016 p->w->pending = 0;
1082 EV_CB_INVOKE (p->w, p->events); 2017 EV_CB_INVOKE (p->w, p->events);
1083 } 2018 EV_FREQUENT_CHECK;
1084 } 2019 }
1085} 2020}
1086 2021
2022#if EV_IDLE_ENABLE
2023/* make idle watchers pending. this handles the "call-idle */
2024/* only when higher priorities are idle" logic */
1087inline void 2025inline_size void
2026idle_reify (EV_P)
2027{
2028 if (expect_false (idleall))
2029 {
2030 int pri;
2031
2032 for (pri = NUMPRI; pri--; )
2033 {
2034 if (pendingcnt [pri])
2035 break;
2036
2037 if (idlecnt [pri])
2038 {
2039 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2040 break;
2041 }
2042 }
2043 }
2044}
2045#endif
2046
2047/* make timers pending */
2048inline_size void
1088timers_reify (EV_P) 2049timers_reify (EV_P)
1089{ 2050{
2051 EV_FREQUENT_CHECK;
2052
1090 while (timercnt && ((WT)timers [0])->at <= mn_now) 2053 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1091 { 2054 {
1092 ev_timer *w = timers [0]; 2055 do
1093
1094 assert (("inactive timer on timer heap detected", ev_is_active (w)));
1095
1096 /* first reschedule or stop timer */
1097 if (w->repeat)
1098 { 2056 {
2057 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2058
2059 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2060
2061 /* first reschedule or stop timer */
2062 if (w->repeat)
2063 {
2064 ev_at (w) += w->repeat;
2065 if (ev_at (w) < mn_now)
2066 ev_at (w) = mn_now;
2067
1099 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2068 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1100 2069
1101 ((WT)w)->at += w->repeat; 2070 ANHE_at_cache (timers [HEAP0]);
1102 if (((WT)w)->at < mn_now)
1103 ((WT)w)->at = mn_now;
1104
1105 downheap ((WT *)timers, timercnt, 0); 2071 downheap (timers, timercnt, HEAP0);
2072 }
2073 else
2074 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2075
2076 EV_FREQUENT_CHECK;
2077 feed_reverse (EV_A_ (W)w);
1106 } 2078 }
1107 else 2079 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1108 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1109 2080
1110 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2081 feed_reverse_done (EV_A_ EV_TIMEOUT);
1111 } 2082 }
1112} 2083}
1113 2084
1114#if EV_PERIODICS 2085#if EV_PERIODIC_ENABLE
2086/* make periodics pending */
1115inline void 2087inline_size void
1116periodics_reify (EV_P) 2088periodics_reify (EV_P)
1117{ 2089{
2090 EV_FREQUENT_CHECK;
2091
1118 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 2092 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1119 { 2093 {
1120 ev_periodic *w = periodics [0]; 2094 int feed_count = 0;
1121 2095
2096 do
2097 {
2098 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2099
1122 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 2100 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1123 2101
1124 /* first reschedule or stop timer */ 2102 /* first reschedule or stop timer */
2103 if (w->reschedule_cb)
2104 {
2105 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2106
2107 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2108
2109 ANHE_at_cache (periodics [HEAP0]);
2110 downheap (periodics, periodiccnt, HEAP0);
2111 }
2112 else if (w->interval)
2113 {
2114 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2115 /* if next trigger time is not sufficiently in the future, put it there */
2116 /* this might happen because of floating point inexactness */
2117 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2118 {
2119 ev_at (w) += w->interval;
2120
2121 /* if interval is unreasonably low we might still have a time in the past */
2122 /* so correct this. this will make the periodic very inexact, but the user */
2123 /* has effectively asked to get triggered more often than possible */
2124 if (ev_at (w) < ev_rt_now)
2125 ev_at (w) = ev_rt_now;
2126 }
2127
2128 ANHE_at_cache (periodics [HEAP0]);
2129 downheap (periodics, periodiccnt, HEAP0);
2130 }
2131 else
2132 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2133
2134 EV_FREQUENT_CHECK;
2135 feed_reverse (EV_A_ (W)w);
2136 }
2137 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2138
2139 feed_reverse_done (EV_A_ EV_PERIODIC);
2140 }
2141}
2142
2143/* simply recalculate all periodics */
2144/* TODO: maybe ensure that at leats one event happens when jumping forward? */
2145static void noinline
2146periodics_reschedule (EV_P)
2147{
2148 int i;
2149
2150 /* adjust periodics after time jump */
2151 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2152 {
2153 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2154
1125 if (w->reschedule_cb) 2155 if (w->reschedule_cb)
2156 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2157 else if (w->interval)
2158 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2159
2160 ANHE_at_cache (periodics [i]);
2161 }
2162
2163 reheap (periodics, periodiccnt);
2164}
2165#endif
2166
2167/* adjust all timers by a given offset */
2168static void noinline
2169timers_reschedule (EV_P_ ev_tstamp adjust)
2170{
2171 int i;
2172
2173 for (i = 0; i < timercnt; ++i)
2174 {
2175 ANHE *he = timers + i + HEAP0;
2176 ANHE_w (*he)->at += adjust;
2177 ANHE_at_cache (*he);
2178 }
2179}
2180
2181/* fetch new monotonic and realtime times from the kernel */
2182/* also detect if there was a timejump, and act accordingly */
2183inline_speed void
2184time_update (EV_P_ ev_tstamp max_block)
2185{
2186#if EV_USE_MONOTONIC
2187 if (expect_true (have_monotonic))
2188 {
2189 int i;
2190 ev_tstamp odiff = rtmn_diff;
2191
2192 mn_now = get_clock ();
2193
2194 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2195 /* interpolate in the meantime */
2196 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1126 { 2197 {
1127 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 2198 ev_rt_now = rtmn_diff + mn_now;
1128 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 2199 return;
1129 downheap ((WT *)periodics, periodiccnt, 0);
1130 } 2200 }
1131 else if (w->interval)
1132 {
1133 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1134 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1135 downheap ((WT *)periodics, periodiccnt, 0);
1136 }
1137 else
1138 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1139 2201
1140 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1141 }
1142}
1143
1144static void
1145periodics_reschedule (EV_P)
1146{
1147 int i;
1148
1149 /* adjust periodics after time jump */
1150 for (i = 0; i < periodiccnt; ++i)
1151 {
1152 ev_periodic *w = periodics [i];
1153
1154 if (w->reschedule_cb)
1155 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1156 else if (w->interval)
1157 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1158 }
1159
1160 /* now rebuild the heap */
1161 for (i = periodiccnt >> 1; i--; )
1162 downheap ((WT *)periodics, periodiccnt, i);
1163}
1164#endif
1165
1166inline int
1167time_update_monotonic (EV_P)
1168{
1169 mn_now = get_clock ();
1170
1171 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1172 {
1173 ev_rt_now = rtmn_diff + mn_now;
1174 return 0;
1175 }
1176 else
1177 {
1178 now_floor = mn_now; 2202 now_floor = mn_now;
1179 ev_rt_now = ev_time (); 2203 ev_rt_now = ev_time ();
1180 return 1;
1181 }
1182}
1183 2204
1184inline void 2205 /* loop a few times, before making important decisions.
1185time_update (EV_P) 2206 * on the choice of "4": one iteration isn't enough,
1186{ 2207 * in case we get preempted during the calls to
1187 int i; 2208 * ev_time and get_clock. a second call is almost guaranteed
1188 2209 * to succeed in that case, though. and looping a few more times
1189#if EV_USE_MONOTONIC 2210 * doesn't hurt either as we only do this on time-jumps or
1190 if (expect_true (have_monotonic)) 2211 * in the unlikely event of having been preempted here.
1191 { 2212 */
1192 if (time_update_monotonic (EV_A)) 2213 for (i = 4; --i; )
1193 { 2214 {
1194 ev_tstamp odiff = rtmn_diff;
1195
1196 /* loop a few times, before making important decisions.
1197 * on the choice of "4": one iteration isn't enough,
1198 * in case we get preempted during the calls to
1199 * ev_time and get_clock. a second call is almost guarenteed
1200 * to succeed in that case, though. and looping a few more times
1201 * doesn't hurt either as we only do this on time-jumps or
1202 * in the unlikely event of getting preempted here.
1203 */
1204 for (i = 4; --i; )
1205 {
1206 rtmn_diff = ev_rt_now - mn_now; 2215 rtmn_diff = ev_rt_now - mn_now;
1207 2216
1208 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2217 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1209 return; /* all is well */ 2218 return; /* all is well */
1210 2219
1211 ev_rt_now = ev_time (); 2220 ev_rt_now = ev_time ();
1212 mn_now = get_clock (); 2221 mn_now = get_clock ();
1213 now_floor = mn_now; 2222 now_floor = mn_now;
1214 } 2223 }
1215 2224
2225 /* no timer adjustment, as the monotonic clock doesn't jump */
2226 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1216# if EV_PERIODICS 2227# if EV_PERIODIC_ENABLE
2228 periodics_reschedule (EV_A);
2229# endif
2230 }
2231 else
2232#endif
2233 {
2234 ev_rt_now = ev_time ();
2235
2236 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2237 {
2238 /* adjust timers. this is easy, as the offset is the same for all of them */
2239 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2240#if EV_PERIODIC_ENABLE
1217 periodics_reschedule (EV_A); 2241 periodics_reschedule (EV_A);
1218# endif 2242#endif
1219 /* no timer adjustment, as the monotonic clock doesn't jump */
1220 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1221 } 2243 }
1222 }
1223 else
1224#endif
1225 {
1226 ev_rt_now = ev_time ();
1227
1228 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1229 {
1230#if EV_PERIODICS
1231 periodics_reschedule (EV_A);
1232#endif
1233
1234 /* adjust timers. this is easy, as the offset is the same for all */
1235 for (i = 0; i < timercnt; ++i)
1236 ((WT)timers [i])->at += ev_rt_now - mn_now;
1237 }
1238 2244
1239 mn_now = ev_rt_now; 2245 mn_now = ev_rt_now;
1240 } 2246 }
1241} 2247}
1242 2248
1243void 2249void
1244ev_ref (EV_P)
1245{
1246 ++activecnt;
1247}
1248
1249void
1250ev_unref (EV_P)
1251{
1252 --activecnt;
1253}
1254
1255static int loop_done;
1256
1257void
1258ev_loop (EV_P_ int flags) 2250ev_loop (EV_P_ int flags)
1259{ 2251{
1260 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 2252#if EV_MINIMAL < 2
1261 ? EVUNLOOP_ONE 2253 ++loop_depth;
1262 : EVUNLOOP_CANCEL; 2254#endif
1263 2255
1264 while (activecnt) 2256 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2257
2258 loop_done = EVUNLOOP_CANCEL;
2259
2260 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2261
2262 do
1265 { 2263 {
2264#if EV_VERIFY >= 2
2265 ev_loop_verify (EV_A);
2266#endif
2267
2268#ifndef _WIN32
2269 if (expect_false (curpid)) /* penalise the forking check even more */
2270 if (expect_false (getpid () != curpid))
2271 {
2272 curpid = getpid ();
2273 postfork = 1;
2274 }
2275#endif
2276
2277#if EV_FORK_ENABLE
2278 /* we might have forked, so queue fork handlers */
2279 if (expect_false (postfork))
2280 if (forkcnt)
2281 {
2282 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2283 EV_INVOKE_PENDING;
2284 }
2285#endif
2286
1266 /* queue check watchers (and execute them) */ 2287 /* queue prepare watchers (and execute them) */
1267 if (expect_false (preparecnt)) 2288 if (expect_false (preparecnt))
1268 { 2289 {
1269 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 2290 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1270 call_pending (EV_A); 2291 EV_INVOKE_PENDING;
1271 } 2292 }
2293
2294 if (expect_false (loop_done))
2295 break;
1272 2296
1273 /* we might have forked, so reify kernel state if necessary */ 2297 /* we might have forked, so reify kernel state if necessary */
1274 if (expect_false (postfork)) 2298 if (expect_false (postfork))
1275 loop_fork (EV_A); 2299 loop_fork (EV_A);
1276 2300
1277 /* update fd-related kernel structures */ 2301 /* update fd-related kernel structures */
1278 fd_reify (EV_A); 2302 fd_reify (EV_A);
1279 2303
1280 /* calculate blocking time */ 2304 /* calculate blocking time */
1281 { 2305 {
1282 double block; 2306 ev_tstamp waittime = 0.;
2307 ev_tstamp sleeptime = 0.;
1283 2308
1284 if (flags & EVLOOP_NONBLOCK || idlecnt) 2309 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
1285 block = 0.; /* do not block at all */
1286 else
1287 { 2310 {
2311 /* remember old timestamp for io_blocktime calculation */
2312 ev_tstamp prev_mn_now = mn_now;
2313
1288 /* update time to cancel out callback processing overhead */ 2314 /* update time to cancel out callback processing overhead */
1289#if EV_USE_MONOTONIC
1290 if (expect_true (have_monotonic))
1291 time_update_monotonic (EV_A); 2315 time_update (EV_A_ 1e100);
1292 else
1293#endif
1294 {
1295 ev_rt_now = ev_time ();
1296 mn_now = ev_rt_now;
1297 }
1298 2316
1299 block = MAX_BLOCKTIME; 2317 waittime = MAX_BLOCKTIME;
1300 2318
1301 if (timercnt) 2319 if (timercnt)
1302 { 2320 {
1303 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 2321 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1304 if (block > to) block = to; 2322 if (waittime > to) waittime = to;
1305 } 2323 }
1306 2324
1307#if EV_PERIODICS 2325#if EV_PERIODIC_ENABLE
1308 if (periodiccnt) 2326 if (periodiccnt)
1309 { 2327 {
1310 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 2328 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1311 if (block > to) block = to; 2329 if (waittime > to) waittime = to;
1312 } 2330 }
1313#endif 2331#endif
1314 2332
2333 /* don't let timeouts decrease the waittime below timeout_blocktime */
2334 if (expect_false (waittime < timeout_blocktime))
2335 waittime = timeout_blocktime;
2336
2337 /* extra check because io_blocktime is commonly 0 */
1315 if (expect_false (block < 0.)) block = 0.; 2338 if (expect_false (io_blocktime))
2339 {
2340 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2341
2342 if (sleeptime > waittime - backend_fudge)
2343 sleeptime = waittime - backend_fudge;
2344
2345 if (expect_true (sleeptime > 0.))
2346 {
2347 ev_sleep (sleeptime);
2348 waittime -= sleeptime;
2349 }
2350 }
1316 } 2351 }
1317 2352
2353#if EV_MINIMAL < 2
2354 ++loop_count;
2355#endif
2356 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
1318 backend_poll (EV_A_ block); 2357 backend_poll (EV_A_ waittime);
2358 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2359
2360 /* update ev_rt_now, do magic */
2361 time_update (EV_A_ waittime + sleeptime);
1319 } 2362 }
1320
1321 /* update ev_rt_now, do magic */
1322 time_update (EV_A);
1323 2363
1324 /* queue pending timers and reschedule them */ 2364 /* queue pending timers and reschedule them */
1325 timers_reify (EV_A); /* relative timers called last */ 2365 timers_reify (EV_A); /* relative timers called last */
1326#if EV_PERIODICS 2366#if EV_PERIODIC_ENABLE
1327 periodics_reify (EV_A); /* absolute timers called first */ 2367 periodics_reify (EV_A); /* absolute timers called first */
1328#endif 2368#endif
1329 2369
2370#if EV_IDLE_ENABLE
1330 /* queue idle watchers unless other events are pending */ 2371 /* queue idle watchers unless other events are pending */
1331 if (idlecnt && !any_pending (EV_A)) 2372 idle_reify (EV_A);
1332 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 2373#endif
1333 2374
1334 /* queue check watchers, to be executed first */ 2375 /* queue check watchers, to be executed first */
1335 if (expect_false (checkcnt)) 2376 if (expect_false (checkcnt))
1336 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 2377 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1337 2378
1338 call_pending (EV_A); 2379 EV_INVOKE_PENDING;
1339
1340 if (expect_false (loop_done))
1341 break;
1342 } 2380 }
2381 while (expect_true (
2382 activecnt
2383 && !loop_done
2384 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2385 ));
1343 2386
1344 if (loop_done == EVUNLOOP_ONE) 2387 if (loop_done == EVUNLOOP_ONE)
1345 loop_done = EVUNLOOP_CANCEL; 2388 loop_done = EVUNLOOP_CANCEL;
2389
2390#if EV_MINIMAL < 2
2391 --loop_depth;
2392#endif
1346} 2393}
1347 2394
1348void 2395void
1349ev_unloop (EV_P_ int how) 2396ev_unloop (EV_P_ int how)
1350{ 2397{
1351 loop_done = how; 2398 loop_done = how;
1352} 2399}
1353 2400
2401void
2402ev_ref (EV_P)
2403{
2404 ++activecnt;
2405}
2406
2407void
2408ev_unref (EV_P)
2409{
2410 --activecnt;
2411}
2412
2413void
2414ev_now_update (EV_P)
2415{
2416 time_update (EV_A_ 1e100);
2417}
2418
2419void
2420ev_suspend (EV_P)
2421{
2422 ev_now_update (EV_A);
2423}
2424
2425void
2426ev_resume (EV_P)
2427{
2428 ev_tstamp mn_prev = mn_now;
2429
2430 ev_now_update (EV_A);
2431 timers_reschedule (EV_A_ mn_now - mn_prev);
2432#if EV_PERIODIC_ENABLE
2433 /* TODO: really do this? */
2434 periodics_reschedule (EV_A);
2435#endif
2436}
2437
1354/*****************************************************************************/ 2438/*****************************************************************************/
2439/* singly-linked list management, used when the expected list length is short */
1355 2440
1356inline void 2441inline_size void
1357wlist_add (WL *head, WL elem) 2442wlist_add (WL *head, WL elem)
1358{ 2443{
1359 elem->next = *head; 2444 elem->next = *head;
1360 *head = elem; 2445 *head = elem;
1361} 2446}
1362 2447
1363inline void 2448inline_size void
1364wlist_del (WL *head, WL elem) 2449wlist_del (WL *head, WL elem)
1365{ 2450{
1366 while (*head) 2451 while (*head)
1367 { 2452 {
1368 if (*head == elem) 2453 if (expect_true (*head == elem))
1369 { 2454 {
1370 *head = elem->next; 2455 *head = elem->next;
1371 return; 2456 break;
1372 } 2457 }
1373 2458
1374 head = &(*head)->next; 2459 head = &(*head)->next;
1375 } 2460 }
1376} 2461}
1377 2462
2463/* internal, faster, version of ev_clear_pending */
1378inline void 2464inline_speed void
1379ev_clear_pending (EV_P_ W w) 2465clear_pending (EV_P_ W w)
1380{ 2466{
1381 if (w->pending) 2467 if (w->pending)
1382 { 2468 {
1383 pendings [ABSPRI (w)][w->pending - 1].w = 0; 2469 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1384 w->pending = 0; 2470 w->pending = 0;
1385 } 2471 }
1386} 2472}
1387 2473
2474int
2475ev_clear_pending (EV_P_ void *w)
2476{
2477 W w_ = (W)w;
2478 int pending = w_->pending;
2479
2480 if (expect_true (pending))
2481 {
2482 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2483 p->w = (W)&pending_w;
2484 w_->pending = 0;
2485 return p->events;
2486 }
2487 else
2488 return 0;
2489}
2490
1388inline void 2491inline_size void
2492pri_adjust (EV_P_ W w)
2493{
2494 int pri = ev_priority (w);
2495 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2496 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2497 ev_set_priority (w, pri);
2498}
2499
2500inline_speed void
1389ev_start (EV_P_ W w, int active) 2501ev_start (EV_P_ W w, int active)
1390{ 2502{
1391 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 2503 pri_adjust (EV_A_ w);
1392 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1393
1394 w->active = active; 2504 w->active = active;
1395 ev_ref (EV_A); 2505 ev_ref (EV_A);
1396} 2506}
1397 2507
1398inline void 2508inline_size void
1399ev_stop (EV_P_ W w) 2509ev_stop (EV_P_ W w)
1400{ 2510{
1401 ev_unref (EV_A); 2511 ev_unref (EV_A);
1402 w->active = 0; 2512 w->active = 0;
1403} 2513}
1404 2514
1405/*****************************************************************************/ 2515/*****************************************************************************/
1406 2516
1407void 2517void noinline
1408ev_io_start (EV_P_ ev_io *w) 2518ev_io_start (EV_P_ ev_io *w)
1409{ 2519{
1410 int fd = w->fd; 2520 int fd = w->fd;
1411 2521
1412 if (expect_false (ev_is_active (w))) 2522 if (expect_false (ev_is_active (w)))
1413 return; 2523 return;
1414 2524
1415 assert (("ev_io_start called with negative fd", fd >= 0)); 2525 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2526 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2527
2528 EV_FREQUENT_CHECK;
1416 2529
1417 ev_start (EV_A_ (W)w, 1); 2530 ev_start (EV_A_ (W)w, 1);
1418 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 2531 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1419 wlist_add ((WL *)&anfds[fd].head, (WL)w); 2532 wlist_add (&anfds[fd].head, (WL)w);
1420 2533
1421 fd_change (EV_A_ fd); 2534 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1422} 2535 w->events &= ~EV__IOFDSET;
1423 2536
1424void 2537 EV_FREQUENT_CHECK;
2538}
2539
2540void noinline
1425ev_io_stop (EV_P_ ev_io *w) 2541ev_io_stop (EV_P_ ev_io *w)
1426{ 2542{
1427 ev_clear_pending (EV_A_ (W)w); 2543 clear_pending (EV_A_ (W)w);
1428 if (expect_false (!ev_is_active (w))) 2544 if (expect_false (!ev_is_active (w)))
1429 return; 2545 return;
1430 2546
1431 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 2547 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1432 2548
2549 EV_FREQUENT_CHECK;
2550
1433 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 2551 wlist_del (&anfds[w->fd].head, (WL)w);
1434 ev_stop (EV_A_ (W)w); 2552 ev_stop (EV_A_ (W)w);
1435 2553
1436 fd_change (EV_A_ w->fd); 2554 fd_change (EV_A_ w->fd, 1);
1437}
1438 2555
1439void 2556 EV_FREQUENT_CHECK;
2557}
2558
2559void noinline
1440ev_timer_start (EV_P_ ev_timer *w) 2560ev_timer_start (EV_P_ ev_timer *w)
1441{ 2561{
1442 if (expect_false (ev_is_active (w))) 2562 if (expect_false (ev_is_active (w)))
1443 return; 2563 return;
1444 2564
1445 ((WT)w)->at += mn_now; 2565 ev_at (w) += mn_now;
1446 2566
1447 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 2567 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1448 2568
2569 EV_FREQUENT_CHECK;
2570
2571 ++timercnt;
1449 ev_start (EV_A_ (W)w, ++timercnt); 2572 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1450 array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2); 2573 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1451 timers [timercnt - 1] = w; 2574 ANHE_w (timers [ev_active (w)]) = (WT)w;
1452 upheap ((WT *)timers, timercnt - 1); 2575 ANHE_at_cache (timers [ev_active (w)]);
2576 upheap (timers, ev_active (w));
1453 2577
2578 EV_FREQUENT_CHECK;
2579
1454 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2580 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1455} 2581}
1456 2582
1457void 2583void noinline
1458ev_timer_stop (EV_P_ ev_timer *w) 2584ev_timer_stop (EV_P_ ev_timer *w)
1459{ 2585{
1460 ev_clear_pending (EV_A_ (W)w); 2586 clear_pending (EV_A_ (W)w);
1461 if (expect_false (!ev_is_active (w))) 2587 if (expect_false (!ev_is_active (w)))
1462 return; 2588 return;
1463 2589
2590 EV_FREQUENT_CHECK;
2591
2592 {
2593 int active = ev_active (w);
2594
1464 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 2595 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1465 2596
2597 --timercnt;
2598
1466 if (expect_true (((W)w)->active < timercnt--)) 2599 if (expect_true (active < timercnt + HEAP0))
1467 { 2600 {
1468 timers [((W)w)->active - 1] = timers [timercnt]; 2601 timers [active] = timers [timercnt + HEAP0];
1469 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2602 adjustheap (timers, timercnt, active);
1470 } 2603 }
2604 }
1471 2605
1472 ((WT)w)->at -= mn_now; 2606 ev_at (w) -= mn_now;
1473 2607
1474 ev_stop (EV_A_ (W)w); 2608 ev_stop (EV_A_ (W)w);
1475}
1476 2609
1477void 2610 EV_FREQUENT_CHECK;
2611}
2612
2613void noinline
1478ev_timer_again (EV_P_ ev_timer *w) 2614ev_timer_again (EV_P_ ev_timer *w)
1479{ 2615{
2616 EV_FREQUENT_CHECK;
2617
1480 if (ev_is_active (w)) 2618 if (ev_is_active (w))
1481 { 2619 {
1482 if (w->repeat) 2620 if (w->repeat)
1483 { 2621 {
1484 ((WT)w)->at = mn_now + w->repeat; 2622 ev_at (w) = mn_now + w->repeat;
2623 ANHE_at_cache (timers [ev_active (w)]);
1485 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 2624 adjustheap (timers, timercnt, ev_active (w));
1486 } 2625 }
1487 else 2626 else
1488 ev_timer_stop (EV_A_ w); 2627 ev_timer_stop (EV_A_ w);
1489 } 2628 }
1490 else if (w->repeat) 2629 else if (w->repeat)
1491 { 2630 {
1492 w->at = w->repeat; 2631 ev_at (w) = w->repeat;
1493 ev_timer_start (EV_A_ w); 2632 ev_timer_start (EV_A_ w);
1494 } 2633 }
1495}
1496 2634
2635 EV_FREQUENT_CHECK;
2636}
2637
2638ev_tstamp
2639ev_timer_remaining (EV_P_ ev_timer *w)
2640{
2641 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2642}
2643
1497#if EV_PERIODICS 2644#if EV_PERIODIC_ENABLE
1498void 2645void noinline
1499ev_periodic_start (EV_P_ ev_periodic *w) 2646ev_periodic_start (EV_P_ ev_periodic *w)
1500{ 2647{
1501 if (expect_false (ev_is_active (w))) 2648 if (expect_false (ev_is_active (w)))
1502 return; 2649 return;
1503 2650
1504 if (w->reschedule_cb) 2651 if (w->reschedule_cb)
1505 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 2652 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1506 else if (w->interval) 2653 else if (w->interval)
1507 { 2654 {
1508 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 2655 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1509 /* this formula differs from the one in periodic_reify because we do not always round up */ 2656 /* this formula differs from the one in periodic_reify because we do not always round up */
1510 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval; 2657 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1511 } 2658 }
2659 else
2660 ev_at (w) = w->offset;
1512 2661
2662 EV_FREQUENT_CHECK;
2663
2664 ++periodiccnt;
1513 ev_start (EV_A_ (W)w, ++periodiccnt); 2665 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1514 array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 2666 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1515 periodics [periodiccnt - 1] = w; 2667 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1516 upheap ((WT *)periodics, periodiccnt - 1); 2668 ANHE_at_cache (periodics [ev_active (w)]);
2669 upheap (periodics, ev_active (w));
1517 2670
2671 EV_FREQUENT_CHECK;
2672
1518 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2673 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1519} 2674}
1520 2675
1521void 2676void noinline
1522ev_periodic_stop (EV_P_ ev_periodic *w) 2677ev_periodic_stop (EV_P_ ev_periodic *w)
1523{ 2678{
1524 ev_clear_pending (EV_A_ (W)w); 2679 clear_pending (EV_A_ (W)w);
1525 if (expect_false (!ev_is_active (w))) 2680 if (expect_false (!ev_is_active (w)))
1526 return; 2681 return;
1527 2682
2683 EV_FREQUENT_CHECK;
2684
2685 {
2686 int active = ev_active (w);
2687
1528 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 2688 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1529 2689
2690 --periodiccnt;
2691
1530 if (expect_true (((W)w)->active < periodiccnt--)) 2692 if (expect_true (active < periodiccnt + HEAP0))
1531 { 2693 {
1532 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 2694 periodics [active] = periodics [periodiccnt + HEAP0];
1533 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 2695 adjustheap (periodics, periodiccnt, active);
1534 } 2696 }
2697 }
1535 2698
1536 ev_stop (EV_A_ (W)w); 2699 ev_stop (EV_A_ (W)w);
1537}
1538 2700
1539void 2701 EV_FREQUENT_CHECK;
2702}
2703
2704void noinline
1540ev_periodic_again (EV_P_ ev_periodic *w) 2705ev_periodic_again (EV_P_ ev_periodic *w)
1541{ 2706{
1542 /* TODO: use adjustheap and recalculation */ 2707 /* TODO: use adjustheap and recalculation */
1543 ev_periodic_stop (EV_A_ w); 2708 ev_periodic_stop (EV_A_ w);
1544 ev_periodic_start (EV_A_ w); 2709 ev_periodic_start (EV_A_ w);
1545} 2710}
1546#endif 2711#endif
1547 2712
1548void 2713#ifndef SA_RESTART
2714# define SA_RESTART 0
2715#endif
2716
2717void noinline
1549ev_idle_start (EV_P_ ev_idle *w) 2718ev_signal_start (EV_P_ ev_signal *w)
1550{ 2719{
1551 if (expect_false (ev_is_active (w))) 2720 if (expect_false (ev_is_active (w)))
1552 return; 2721 return;
1553 2722
2723 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2724
2725#if EV_MULTIPLICITY
2726 assert (("libev: a signal must not be attached to two different loops",
2727 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2728
2729 signals [w->signum - 1].loop = EV_A;
2730#endif
2731
2732 EV_FREQUENT_CHECK;
2733
2734#if EV_USE_SIGNALFD
2735 if (sigfd == -2)
2736 {
2737 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2738 if (sigfd < 0 && errno == EINVAL)
2739 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2740
2741 if (sigfd >= 0)
2742 {
2743 fd_intern (sigfd); /* doing it twice will not hurt */
2744
2745 sigemptyset (&sigfd_set);
2746
2747 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2748 ev_set_priority (&sigfd_w, EV_MAXPRI);
2749 ev_io_start (EV_A_ &sigfd_w);
2750 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2751 }
2752 }
2753
2754 if (sigfd >= 0)
2755 {
2756 /* TODO: check .head */
2757 sigaddset (&sigfd_set, w->signum);
2758 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2759
2760 signalfd (sigfd, &sigfd_set, 0);
2761 }
2762#endif
2763
1554 ev_start (EV_A_ (W)w, ++idlecnt); 2764 ev_start (EV_A_ (W)w, 1);
1555 array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2); 2765 wlist_add (&signals [w->signum - 1].head, (WL)w);
1556 idles [idlecnt - 1] = w;
1557}
1558 2766
1559void 2767 if (!((WL)w)->next)
2768# if EV_USE_SIGNALFD
2769 if (sigfd < 0) /*TODO*/
2770# endif
2771 {
2772# ifdef _WIN32
2773 evpipe_init (EV_A);
2774
2775 signal (w->signum, ev_sighandler);
2776# else
2777 struct sigaction sa;
2778
2779 evpipe_init (EV_A);
2780
2781 sa.sa_handler = ev_sighandler;
2782 sigfillset (&sa.sa_mask);
2783 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2784 sigaction (w->signum, &sa, 0);
2785
2786 sigemptyset (&sa.sa_mask);
2787 sigaddset (&sa.sa_mask, w->signum);
2788 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2789#endif
2790 }
2791
2792 EV_FREQUENT_CHECK;
2793}
2794
2795void noinline
1560ev_idle_stop (EV_P_ ev_idle *w) 2796ev_signal_stop (EV_P_ ev_signal *w)
1561{ 2797{
1562 ev_clear_pending (EV_A_ (W)w); 2798 clear_pending (EV_A_ (W)w);
1563 if (expect_false (!ev_is_active (w))) 2799 if (expect_false (!ev_is_active (w)))
1564 return; 2800 return;
1565 2801
1566 { 2802 EV_FREQUENT_CHECK;
1567 int active = ((W)w)->active;
1568 idles [active - 1] = idles [--idlecnt];
1569 ((W)idles [active - 1])->active = active;
1570 }
1571 2803
2804 wlist_del (&signals [w->signum - 1].head, (WL)w);
1572 ev_stop (EV_A_ (W)w); 2805 ev_stop (EV_A_ (W)w);
1573}
1574 2806
2807 if (!signals [w->signum - 1].head)
2808 {
2809#if EV_MULTIPLICITY
2810 signals [w->signum - 1].loop = 0; /* unattach from signal */
2811#endif
2812#if EV_USE_SIGNALFD
2813 if (sigfd >= 0)
2814 {
2815 sigset_t ss;
2816
2817 sigemptyset (&ss);
2818 sigaddset (&ss, w->signum);
2819 sigdelset (&sigfd_set, w->signum);
2820
2821 signalfd (sigfd, &sigfd_set, 0);
2822 sigprocmask (SIG_UNBLOCK, &ss, 0);
2823 }
2824 else
2825#endif
2826 signal (w->signum, SIG_DFL);
2827 }
2828
2829 EV_FREQUENT_CHECK;
2830}
2831
1575void 2832void
1576ev_prepare_start (EV_P_ ev_prepare *w) 2833ev_child_start (EV_P_ ev_child *w)
1577{ 2834{
2835#if EV_MULTIPLICITY
2836 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2837#endif
1578 if (expect_false (ev_is_active (w))) 2838 if (expect_false (ev_is_active (w)))
1579 return; 2839 return;
2840
2841 EV_FREQUENT_CHECK;
2842
2843 ev_start (EV_A_ (W)w, 1);
2844 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2845
2846 EV_FREQUENT_CHECK;
2847}
2848
2849void
2850ev_child_stop (EV_P_ ev_child *w)
2851{
2852 clear_pending (EV_A_ (W)w);
2853 if (expect_false (!ev_is_active (w)))
2854 return;
2855
2856 EV_FREQUENT_CHECK;
2857
2858 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2859 ev_stop (EV_A_ (W)w);
2860
2861 EV_FREQUENT_CHECK;
2862}
2863
2864#if EV_STAT_ENABLE
2865
2866# ifdef _WIN32
2867# undef lstat
2868# define lstat(a,b) _stati64 (a,b)
2869# endif
2870
2871#define DEF_STAT_INTERVAL 5.0074891
2872#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2873#define MIN_STAT_INTERVAL 0.1074891
2874
2875static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2876
2877#if EV_USE_INOTIFY
2878
2879/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2880# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2881
2882static void noinline
2883infy_add (EV_P_ ev_stat *w)
2884{
2885 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);
2886
2887 if (w->wd >= 0)
2888 {
2889 struct statfs sfs;
2890
2891 /* now local changes will be tracked by inotify, but remote changes won't */
2892 /* unless the filesystem is known to be local, we therefore still poll */
2893 /* also do poll on <2.6.25, but with normal frequency */
2894
2895 if (!fs_2625)
2896 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2897 else if (!statfs (w->path, &sfs)
2898 && (sfs.f_type == 0x1373 /* devfs */
2899 || sfs.f_type == 0xEF53 /* ext2/3 */
2900 || sfs.f_type == 0x3153464a /* jfs */
2901 || sfs.f_type == 0x52654973 /* reiser3 */
2902 || sfs.f_type == 0x01021994 /* tempfs */
2903 || sfs.f_type == 0x58465342 /* xfs */))
2904 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2905 else
2906 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2907 }
2908 else
2909 {
2910 /* can't use inotify, continue to stat */
2911 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2912
2913 /* if path is not there, monitor some parent directory for speedup hints */
2914 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2915 /* but an efficiency issue only */
2916 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2917 {
2918 char path [4096];
2919 strcpy (path, w->path);
2920
2921 do
2922 {
2923 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2924 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2925
2926 char *pend = strrchr (path, '/');
2927
2928 if (!pend || pend == path)
2929 break;
2930
2931 *pend = 0;
2932 w->wd = inotify_add_watch (fs_fd, path, mask);
2933 }
2934 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2935 }
2936 }
2937
2938 if (w->wd >= 0)
2939 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2940
2941 /* now re-arm timer, if required */
2942 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2943 ev_timer_again (EV_A_ &w->timer);
2944 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2945}
2946
2947static void noinline
2948infy_del (EV_P_ ev_stat *w)
2949{
2950 int slot;
2951 int wd = w->wd;
2952
2953 if (wd < 0)
2954 return;
2955
2956 w->wd = -2;
2957 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2958 wlist_del (&fs_hash [slot].head, (WL)w);
2959
2960 /* remove this watcher, if others are watching it, they will rearm */
2961 inotify_rm_watch (fs_fd, wd);
2962}
2963
2964static void noinline
2965infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2966{
2967 if (slot < 0)
2968 /* overflow, need to check for all hash slots */
2969 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2970 infy_wd (EV_A_ slot, wd, ev);
2971 else
2972 {
2973 WL w_;
2974
2975 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2976 {
2977 ev_stat *w = (ev_stat *)w_;
2978 w_ = w_->next; /* lets us remove this watcher and all before it */
2979
2980 if (w->wd == wd || wd == -1)
2981 {
2982 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2983 {
2984 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2985 w->wd = -1;
2986 infy_add (EV_A_ w); /* re-add, no matter what */
2987 }
2988
2989 stat_timer_cb (EV_A_ &w->timer, 0);
2990 }
2991 }
2992 }
2993}
2994
2995static void
2996infy_cb (EV_P_ ev_io *w, int revents)
2997{
2998 char buf [EV_INOTIFY_BUFSIZE];
2999 int ofs;
3000 int len = read (fs_fd, buf, sizeof (buf));
3001
3002 for (ofs = 0; ofs < len; )
3003 {
3004 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3005 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3006 ofs += sizeof (struct inotify_event) + ev->len;
3007 }
3008}
3009
3010inline_size unsigned int
3011ev_linux_version (void)
3012{
3013 struct utsname buf;
3014 unsigned int v;
3015 int i;
3016 char *p = buf.release;
3017
3018 if (uname (&buf))
3019 return 0;
3020
3021 for (i = 3+1; --i; )
3022 {
3023 unsigned int c = 0;
3024
3025 for (;;)
3026 {
3027 if (*p >= '0' && *p <= '9')
3028 c = c * 10 + *p++ - '0';
3029 else
3030 {
3031 p += *p == '.';
3032 break;
3033 }
3034 }
3035
3036 v = (v << 8) | c;
3037 }
3038
3039 return v;
3040}
3041
3042inline_size void
3043ev_check_2625 (EV_P)
3044{
3045 /* kernels < 2.6.25 are borked
3046 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3047 */
3048 if (ev_linux_version () < 0x020619)
3049 return;
3050
3051 fs_2625 = 1;
3052}
3053
3054inline_size int
3055infy_newfd (void)
3056{
3057#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3058 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3059 if (fd >= 0)
3060 return fd;
3061#endif
3062 return inotify_init ();
3063}
3064
3065inline_size void
3066infy_init (EV_P)
3067{
3068 if (fs_fd != -2)
3069 return;
3070
3071 fs_fd = -1;
3072
3073 ev_check_2625 (EV_A);
3074
3075 fs_fd = infy_newfd ();
3076
3077 if (fs_fd >= 0)
3078 {
3079 fd_intern (fs_fd);
3080 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3081 ev_set_priority (&fs_w, EV_MAXPRI);
3082 ev_io_start (EV_A_ &fs_w);
3083 ev_unref (EV_A);
3084 }
3085}
3086
3087inline_size void
3088infy_fork (EV_P)
3089{
3090 int slot;
3091
3092 if (fs_fd < 0)
3093 return;
3094
3095 ev_ref (EV_A);
3096 ev_io_stop (EV_A_ &fs_w);
3097 close (fs_fd);
3098 fs_fd = infy_newfd ();
3099
3100 if (fs_fd >= 0)
3101 {
3102 fd_intern (fs_fd);
3103 ev_io_set (&fs_w, fs_fd, EV_READ);
3104 ev_io_start (EV_A_ &fs_w);
3105 ev_unref (EV_A);
3106 }
3107
3108 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
3109 {
3110 WL w_ = fs_hash [slot].head;
3111 fs_hash [slot].head = 0;
3112
3113 while (w_)
3114 {
3115 ev_stat *w = (ev_stat *)w_;
3116 w_ = w_->next; /* lets us add this watcher */
3117
3118 w->wd = -1;
3119
3120 if (fs_fd >= 0)
3121 infy_add (EV_A_ w); /* re-add, no matter what */
3122 else
3123 {
3124 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3125 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3126 ev_timer_again (EV_A_ &w->timer);
3127 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3128 }
3129 }
3130 }
3131}
3132
3133#endif
3134
3135#ifdef _WIN32
3136# define EV_LSTAT(p,b) _stati64 (p, b)
3137#else
3138# define EV_LSTAT(p,b) lstat (p, b)
3139#endif
3140
3141void
3142ev_stat_stat (EV_P_ ev_stat *w)
3143{
3144 if (lstat (w->path, &w->attr) < 0)
3145 w->attr.st_nlink = 0;
3146 else if (!w->attr.st_nlink)
3147 w->attr.st_nlink = 1;
3148}
3149
3150static void noinline
3151stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3152{
3153 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3154
3155 ev_statdata prev = w->attr;
3156 ev_stat_stat (EV_A_ w);
3157
3158 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3159 if (
3160 prev.st_dev != w->attr.st_dev
3161 || prev.st_ino != w->attr.st_ino
3162 || prev.st_mode != w->attr.st_mode
3163 || prev.st_nlink != w->attr.st_nlink
3164 || prev.st_uid != w->attr.st_uid
3165 || prev.st_gid != w->attr.st_gid
3166 || prev.st_rdev != w->attr.st_rdev
3167 || prev.st_size != w->attr.st_size
3168 || prev.st_atime != w->attr.st_atime
3169 || prev.st_mtime != w->attr.st_mtime
3170 || prev.st_ctime != w->attr.st_ctime
3171 ) {
3172 /* we only update w->prev on actual differences */
3173 /* in case we test more often than invoke the callback, */
3174 /* to ensure that prev is always different to attr */
3175 w->prev = prev;
3176
3177 #if EV_USE_INOTIFY
3178 if (fs_fd >= 0)
3179 {
3180 infy_del (EV_A_ w);
3181 infy_add (EV_A_ w);
3182 ev_stat_stat (EV_A_ w); /* avoid race... */
3183 }
3184 #endif
3185
3186 ev_feed_event (EV_A_ w, EV_STAT);
3187 }
3188}
3189
3190void
3191ev_stat_start (EV_P_ ev_stat *w)
3192{
3193 if (expect_false (ev_is_active (w)))
3194 return;
3195
3196 ev_stat_stat (EV_A_ w);
3197
3198 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3199 w->interval = MIN_STAT_INTERVAL;
3200
3201 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3202 ev_set_priority (&w->timer, ev_priority (w));
3203
3204#if EV_USE_INOTIFY
3205 infy_init (EV_A);
3206
3207 if (fs_fd >= 0)
3208 infy_add (EV_A_ w);
3209 else
3210#endif
3211 {
3212 ev_timer_again (EV_A_ &w->timer);
3213 ev_unref (EV_A);
3214 }
3215
3216 ev_start (EV_A_ (W)w, 1);
3217
3218 EV_FREQUENT_CHECK;
3219}
3220
3221void
3222ev_stat_stop (EV_P_ ev_stat *w)
3223{
3224 clear_pending (EV_A_ (W)w);
3225 if (expect_false (!ev_is_active (w)))
3226 return;
3227
3228 EV_FREQUENT_CHECK;
3229
3230#if EV_USE_INOTIFY
3231 infy_del (EV_A_ w);
3232#endif
3233
3234 if (ev_is_active (&w->timer))
3235 {
3236 ev_ref (EV_A);
3237 ev_timer_stop (EV_A_ &w->timer);
3238 }
3239
3240 ev_stop (EV_A_ (W)w);
3241
3242 EV_FREQUENT_CHECK;
3243}
3244#endif
3245
3246#if EV_IDLE_ENABLE
3247void
3248ev_idle_start (EV_P_ ev_idle *w)
3249{
3250 if (expect_false (ev_is_active (w)))
3251 return;
3252
3253 pri_adjust (EV_A_ (W)w);
3254
3255 EV_FREQUENT_CHECK;
3256
3257 {
3258 int active = ++idlecnt [ABSPRI (w)];
3259
3260 ++idleall;
3261 ev_start (EV_A_ (W)w, active);
3262
3263 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3264 idles [ABSPRI (w)][active - 1] = w;
3265 }
3266
3267 EV_FREQUENT_CHECK;
3268}
3269
3270void
3271ev_idle_stop (EV_P_ ev_idle *w)
3272{
3273 clear_pending (EV_A_ (W)w);
3274 if (expect_false (!ev_is_active (w)))
3275 return;
3276
3277 EV_FREQUENT_CHECK;
3278
3279 {
3280 int active = ev_active (w);
3281
3282 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3283 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3284
3285 ev_stop (EV_A_ (W)w);
3286 --idleall;
3287 }
3288
3289 EV_FREQUENT_CHECK;
3290}
3291#endif
3292
3293void
3294ev_prepare_start (EV_P_ ev_prepare *w)
3295{
3296 if (expect_false (ev_is_active (w)))
3297 return;
3298
3299 EV_FREQUENT_CHECK;
1580 3300
1581 ev_start (EV_A_ (W)w, ++preparecnt); 3301 ev_start (EV_A_ (W)w, ++preparecnt);
1582 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 3302 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1583 prepares [preparecnt - 1] = w; 3303 prepares [preparecnt - 1] = w;
3304
3305 EV_FREQUENT_CHECK;
1584} 3306}
1585 3307
1586void 3308void
1587ev_prepare_stop (EV_P_ ev_prepare *w) 3309ev_prepare_stop (EV_P_ ev_prepare *w)
1588{ 3310{
1589 ev_clear_pending (EV_A_ (W)w); 3311 clear_pending (EV_A_ (W)w);
1590 if (expect_false (!ev_is_active (w))) 3312 if (expect_false (!ev_is_active (w)))
1591 return; 3313 return;
1592 3314
3315 EV_FREQUENT_CHECK;
3316
1593 { 3317 {
1594 int active = ((W)w)->active; 3318 int active = ev_active (w);
3319
1595 prepares [active - 1] = prepares [--preparecnt]; 3320 prepares [active - 1] = prepares [--preparecnt];
1596 ((W)prepares [active - 1])->active = active; 3321 ev_active (prepares [active - 1]) = active;
1597 } 3322 }
1598 3323
1599 ev_stop (EV_A_ (W)w); 3324 ev_stop (EV_A_ (W)w);
3325
3326 EV_FREQUENT_CHECK;
1600} 3327}
1601 3328
1602void 3329void
1603ev_check_start (EV_P_ ev_check *w) 3330ev_check_start (EV_P_ ev_check *w)
1604{ 3331{
1605 if (expect_false (ev_is_active (w))) 3332 if (expect_false (ev_is_active (w)))
1606 return; 3333 return;
3334
3335 EV_FREQUENT_CHECK;
1607 3336
1608 ev_start (EV_A_ (W)w, ++checkcnt); 3337 ev_start (EV_A_ (W)w, ++checkcnt);
1609 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 3338 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1610 checks [checkcnt - 1] = w; 3339 checks [checkcnt - 1] = w;
3340
3341 EV_FREQUENT_CHECK;
1611} 3342}
1612 3343
1613void 3344void
1614ev_check_stop (EV_P_ ev_check *w) 3345ev_check_stop (EV_P_ ev_check *w)
1615{ 3346{
1616 ev_clear_pending (EV_A_ (W)w); 3347 clear_pending (EV_A_ (W)w);
1617 if (expect_false (!ev_is_active (w))) 3348 if (expect_false (!ev_is_active (w)))
1618 return; 3349 return;
1619 3350
3351 EV_FREQUENT_CHECK;
3352
1620 { 3353 {
1621 int active = ((W)w)->active; 3354 int active = ev_active (w);
3355
1622 checks [active - 1] = checks [--checkcnt]; 3356 checks [active - 1] = checks [--checkcnt];
1623 ((W)checks [active - 1])->active = active; 3357 ev_active (checks [active - 1]) = active;
1624 } 3358 }
1625 3359
1626 ev_stop (EV_A_ (W)w); 3360 ev_stop (EV_A_ (W)w);
1627}
1628 3361
1629#ifndef SA_RESTART 3362 EV_FREQUENT_CHECK;
1630# define SA_RESTART 0
1631#endif
1632
1633void
1634ev_signal_start (EV_P_ ev_signal *w)
1635{
1636#if EV_MULTIPLICITY
1637 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1638#endif
1639 if (expect_false (ev_is_active (w)))
1640 return;
1641
1642 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1643
1644 ev_start (EV_A_ (W)w, 1);
1645 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1646 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1647
1648 if (!((WL)w)->next)
1649 {
1650#if _WIN32
1651 signal (w->signum, sighandler);
1652#else
1653 struct sigaction sa;
1654 sa.sa_handler = sighandler;
1655 sigfillset (&sa.sa_mask);
1656 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1657 sigaction (w->signum, &sa, 0);
1658#endif
1659 }
1660} 3363}
1661 3364
1662void 3365#if EV_EMBED_ENABLE
1663ev_signal_stop (EV_P_ ev_signal *w) 3366void noinline
1664{
1665 ev_clear_pending (EV_A_ (W)w);
1666 if (expect_false (!ev_is_active (w)))
1667 return;
1668
1669 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1670 ev_stop (EV_A_ (W)w);
1671
1672 if (!signals [w->signum - 1].head)
1673 signal (w->signum, SIG_DFL);
1674}
1675
1676void
1677ev_child_start (EV_P_ ev_child *w)
1678{
1679#if EV_MULTIPLICITY
1680 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1681#endif
1682 if (expect_false (ev_is_active (w)))
1683 return;
1684
1685 ev_start (EV_A_ (W)w, 1);
1686 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1687}
1688
1689void
1690ev_child_stop (EV_P_ ev_child *w)
1691{
1692 ev_clear_pending (EV_A_ (W)w);
1693 if (expect_false (!ev_is_active (w)))
1694 return;
1695
1696 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1697 ev_stop (EV_A_ (W)w);
1698}
1699
1700#if EV_MULTIPLICITY
1701void
1702ev_embed_sweep (EV_P_ ev_embed *w) 3367ev_embed_sweep (EV_P_ ev_embed *w)
1703{ 3368{
1704 ev_loop (w->loop, EVLOOP_NONBLOCK); 3369 ev_loop (w->other, EVLOOP_NONBLOCK);
1705} 3370}
1706 3371
1707static void 3372static void
1708embed_cb (EV_P_ ev_io *io, int revents) 3373embed_io_cb (EV_P_ ev_io *io, int revents)
1709{ 3374{
1710 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 3375 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
1711 3376
1712 if (ev_cb (w)) 3377 if (ev_cb (w))
1713 ev_feed_event (EV_A_ (W)w, EV_EMBED); 3378 ev_feed_event (EV_A_ (W)w, EV_EMBED);
1714 else 3379 else
1715 ev_embed_sweep (loop, w); 3380 ev_loop (w->other, EVLOOP_NONBLOCK);
1716} 3381}
3382
3383static void
3384embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3385{
3386 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3387
3388 {
3389 EV_P = w->other;
3390
3391 while (fdchangecnt)
3392 {
3393 fd_reify (EV_A);
3394 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3395 }
3396 }
3397}
3398
3399static void
3400embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
3401{
3402 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
3403
3404 ev_embed_stop (EV_A_ w);
3405
3406 {
3407 EV_P = w->other;
3408
3409 ev_loop_fork (EV_A);
3410 ev_loop (EV_A_ EVLOOP_NONBLOCK);
3411 }
3412
3413 ev_embed_start (EV_A_ w);
3414}
3415
3416#if 0
3417static void
3418embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3419{
3420 ev_idle_stop (EV_A_ idle);
3421}
3422#endif
1717 3423
1718void 3424void
1719ev_embed_start (EV_P_ ev_embed *w) 3425ev_embed_start (EV_P_ ev_embed *w)
1720{ 3426{
1721 if (expect_false (ev_is_active (w))) 3427 if (expect_false (ev_is_active (w)))
1722 return; 3428 return;
1723 3429
1724 { 3430 {
1725 struct ev_loop *loop = w->loop; 3431 EV_P = w->other;
1726 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 3432 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
1727 ev_io_init (&w->io, embed_cb, backend_fd, EV_READ); 3433 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
1728 } 3434 }
3435
3436 EV_FREQUENT_CHECK;
1729 3437
1730 ev_set_priority (&w->io, ev_priority (w)); 3438 ev_set_priority (&w->io, ev_priority (w));
1731 ev_io_start (EV_A_ &w->io); 3439 ev_io_start (EV_A_ &w->io);
3440
3441 ev_prepare_init (&w->prepare, embed_prepare_cb);
3442 ev_set_priority (&w->prepare, EV_MINPRI);
3443 ev_prepare_start (EV_A_ &w->prepare);
3444
3445 ev_fork_init (&w->fork, embed_fork_cb);
3446 ev_fork_start (EV_A_ &w->fork);
3447
3448 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3449
1732 ev_start (EV_A_ (W)w, 1); 3450 ev_start (EV_A_ (W)w, 1);
3451
3452 EV_FREQUENT_CHECK;
1733} 3453}
1734 3454
1735void 3455void
1736ev_embed_stop (EV_P_ ev_embed *w) 3456ev_embed_stop (EV_P_ ev_embed *w)
1737{ 3457{
1738 ev_clear_pending (EV_A_ (W)w); 3458 clear_pending (EV_A_ (W)w);
1739 if (expect_false (!ev_is_active (w))) 3459 if (expect_false (!ev_is_active (w)))
1740 return; 3460 return;
1741 3461
3462 EV_FREQUENT_CHECK;
3463
1742 ev_io_stop (EV_A_ &w->io); 3464 ev_io_stop (EV_A_ &w->io);
3465 ev_prepare_stop (EV_A_ &w->prepare);
3466 ev_fork_stop (EV_A_ &w->fork);
3467
1743 ev_stop (EV_A_ (W)w); 3468 ev_stop (EV_A_ (W)w);
3469
3470 EV_FREQUENT_CHECK;
3471}
3472#endif
3473
3474#if EV_FORK_ENABLE
3475void
3476ev_fork_start (EV_P_ ev_fork *w)
3477{
3478 if (expect_false (ev_is_active (w)))
3479 return;
3480
3481 EV_FREQUENT_CHECK;
3482
3483 ev_start (EV_A_ (W)w, ++forkcnt);
3484 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3485 forks [forkcnt - 1] = w;
3486
3487 EV_FREQUENT_CHECK;
3488}
3489
3490void
3491ev_fork_stop (EV_P_ ev_fork *w)
3492{
3493 clear_pending (EV_A_ (W)w);
3494 if (expect_false (!ev_is_active (w)))
3495 return;
3496
3497 EV_FREQUENT_CHECK;
3498
3499 {
3500 int active = ev_active (w);
3501
3502 forks [active - 1] = forks [--forkcnt];
3503 ev_active (forks [active - 1]) = active;
3504 }
3505
3506 ev_stop (EV_A_ (W)w);
3507
3508 EV_FREQUENT_CHECK;
3509}
3510#endif
3511
3512#if EV_ASYNC_ENABLE
3513void
3514ev_async_start (EV_P_ ev_async *w)
3515{
3516 if (expect_false (ev_is_active (w)))
3517 return;
3518
3519 evpipe_init (EV_A);
3520
3521 EV_FREQUENT_CHECK;
3522
3523 ev_start (EV_A_ (W)w, ++asynccnt);
3524 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3525 asyncs [asynccnt - 1] = w;
3526
3527 EV_FREQUENT_CHECK;
3528}
3529
3530void
3531ev_async_stop (EV_P_ ev_async *w)
3532{
3533 clear_pending (EV_A_ (W)w);
3534 if (expect_false (!ev_is_active (w)))
3535 return;
3536
3537 EV_FREQUENT_CHECK;
3538
3539 {
3540 int active = ev_active (w);
3541
3542 asyncs [active - 1] = asyncs [--asynccnt];
3543 ev_active (asyncs [active - 1]) = active;
3544 }
3545
3546 ev_stop (EV_A_ (W)w);
3547
3548 EV_FREQUENT_CHECK;
3549}
3550
3551void
3552ev_async_send (EV_P_ ev_async *w)
3553{
3554 w->sent = 1;
3555 evpipe_write (EV_A_ &async_pending);
1744} 3556}
1745#endif 3557#endif
1746 3558
1747/*****************************************************************************/ 3559/*****************************************************************************/
1748 3560
… …
1758once_cb (EV_P_ struct ev_once *once, int revents) 3570once_cb (EV_P_ struct ev_once *once, int revents)
1759{ 3571{
1760 void (*cb)(int revents, void *arg) = once->cb; 3572 void (*cb)(int revents, void *arg) = once->cb;
1761 void *arg = once->arg; 3573 void *arg = once->arg;
1762 3574
1763 ev_io_stop (EV_A_ &once->io); 3575 ev_io_stop (EV_A_ &once->io);
1764 ev_timer_stop (EV_A_ &once->to); 3576 ev_timer_stop (EV_A_ &once->to);
1765 ev_free (once); 3577 ev_free (once);
1766 3578
1767 cb (revents, arg); 3579 cb (revents, arg);
1768} 3580}
1769 3581
1770static void 3582static void
1771once_cb_io (EV_P_ ev_io *w, int revents) 3583once_cb_io (EV_P_ ev_io *w, int revents)
1772{ 3584{
1773 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3585 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3586
3587 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1774} 3588}
1775 3589
1776static void 3590static void
1777once_cb_to (EV_P_ ev_timer *w, int revents) 3591once_cb_to (EV_P_ ev_timer *w, int revents)
1778{ 3592{
1779 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3593 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3594
3595 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1780} 3596}
1781 3597
1782void 3598void
1783ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3599ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1784{ 3600{
… …
1806 ev_timer_set (&once->to, timeout, 0.); 3622 ev_timer_set (&once->to, timeout, 0.);
1807 ev_timer_start (EV_A_ &once->to); 3623 ev_timer_start (EV_A_ &once->to);
1808 } 3624 }
1809} 3625}
1810 3626
3627/*****************************************************************************/
3628
3629#if EV_WALK_ENABLE
3630void
3631ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3632{
3633 int i, j;
3634 ev_watcher_list *wl, *wn;
3635
3636 if (types & (EV_IO | EV_EMBED))
3637 for (i = 0; i < anfdmax; ++i)
3638 for (wl = anfds [i].head; wl; )
3639 {
3640 wn = wl->next;
3641
3642#if EV_EMBED_ENABLE
3643 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3644 {
3645 if (types & EV_EMBED)
3646 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3647 }
3648 else
3649#endif
3650#if EV_USE_INOTIFY
3651 if (ev_cb ((ev_io *)wl) == infy_cb)
3652 ;
3653 else
3654#endif
3655 if ((ev_io *)wl != &pipe_w)
3656 if (types & EV_IO)
3657 cb (EV_A_ EV_IO, wl);
3658
3659 wl = wn;
3660 }
3661
3662 if (types & (EV_TIMER | EV_STAT))
3663 for (i = timercnt + HEAP0; i-- > HEAP0; )
3664#if EV_STAT_ENABLE
3665 /*TODO: timer is not always active*/
3666 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
3667 {
3668 if (types & EV_STAT)
3669 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
3670 }
3671 else
3672#endif
3673 if (types & EV_TIMER)
3674 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
3675
3676#if EV_PERIODIC_ENABLE
3677 if (types & EV_PERIODIC)
3678 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3679 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3680#endif
3681
3682#if EV_IDLE_ENABLE
3683 if (types & EV_IDLE)
3684 for (j = NUMPRI; i--; )
3685 for (i = idlecnt [j]; i--; )
3686 cb (EV_A_ EV_IDLE, idles [j][i]);
3687#endif
3688
3689#if EV_FORK_ENABLE
3690 if (types & EV_FORK)
3691 for (i = forkcnt; i--; )
3692 if (ev_cb (forks [i]) != embed_fork_cb)
3693 cb (EV_A_ EV_FORK, forks [i]);
3694#endif
3695
3696#if EV_ASYNC_ENABLE
3697 if (types & EV_ASYNC)
3698 for (i = asynccnt; i--; )
3699 cb (EV_A_ EV_ASYNC, asyncs [i]);
3700#endif
3701
3702 if (types & EV_PREPARE)
3703 for (i = preparecnt; i--; )
3704#if EV_EMBED_ENABLE
3705 if (ev_cb (prepares [i]) != embed_prepare_cb)
3706#endif
3707 cb (EV_A_ EV_PREPARE, prepares [i]);
3708
3709 if (types & EV_CHECK)
3710 for (i = checkcnt; i--; )
3711 cb (EV_A_ EV_CHECK, checks [i]);
3712
3713 if (types & EV_SIGNAL)
3714 for (i = 0; i < EV_NSIG - 1; ++i)
3715 for (wl = signals [i].head; wl; )
3716 {
3717 wn = wl->next;
3718 cb (EV_A_ EV_SIGNAL, wl);
3719 wl = wn;
3720 }
3721
3722 if (types & EV_CHILD)
3723 for (i = EV_PID_HASHSIZE; i--; )
3724 for (wl = childs [i]; wl; )
3725 {
3726 wn = wl->next;
3727 cb (EV_A_ EV_CHILD, wl);
3728 wl = wn;
3729 }
3730/* EV_STAT 0x00001000 /* stat data changed */
3731/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3732}
3733#endif
3734
3735#if EV_MULTIPLICITY
3736 #include "ev_wrap.h"
3737#endif
3738
1811#ifdef __cplusplus 3739#ifdef __cplusplus
1812} 3740}
1813#endif 3741#endif
1814 3742

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