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Comparing libev/ev.c (file contents):
Revision 1.22 by root, Wed Oct 31 19:07:43 2007 UTC vs.
Revision 1.373 by root, Sun Feb 20 02:56:23 2011 UTC

1/* 1/*
2 * libev event processing core, watcher management
3 *
2 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>
3 * All rights reserved. 5 * All rights reserved.
4 * 6 *
5 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
6 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
7 * met:
8 * 9 *
9 * * Redistributions of source code must retain the above copyright 10 * 1. Redistributions of source code must retain the above copyright notice,
10 * notice, this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
11 * 12 *
12 * * Redistributions in binary form must reproduce the above 13 * 2. Redistributions in binary form must reproduce the above copyright
13 * copyright notice, this list of conditions and the following 14 * notice, this list of conditions and the following disclaimer in the
14 * disclaimer in the documentation and/or other materials provided 15 * documentation and/or other materials provided with the distribution.
15 * with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
28 */ 38 */
29 39
30#include <math.h> 40/* this big block deduces configuration from config.h */
41#ifndef EV_STANDALONE
42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H
44# else
45# include "config.h"
46# endif
47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined(EV_USE_CLOCK_SYSCALL)
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
67
68# if HAVE_CLOCK_GETTIME
69# ifndef EV_USE_MONOTONIC
70# define EV_USE_MONOTONIC 1
71# endif
72# ifndef EV_USE_REALTIME
73# define EV_USE_REALTIME 0
74# endif
75# else
76# ifndef EV_USE_MONOTONIC
77# define EV_USE_MONOTONIC 0
78# endif
79# ifndef EV_USE_REALTIME
80# define EV_USE_REALTIME 0
81# endif
82# endif
83
84# if HAVE_NANOSLEEP
85# ifndef EV_USE_NANOSLEEP
86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
88# else
89# undef EV_USE_NANOSLEEP
90# define EV_USE_NANOSLEEP 0
91# endif
92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
94# ifndef EV_USE_SELECT
95# define EV_USE_SELECT EV_FEATURE_BACKENDS
96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
100# endif
101
102# if HAVE_POLL && HAVE_POLL_H
103# ifndef EV_USE_POLL
104# define EV_USE_POLL EV_FEATURE_BACKENDS
105# endif
106# else
107# undef EV_USE_POLL
108# define EV_USE_POLL 0
109# endif
110
111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
112# ifndef EV_USE_EPOLL
113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
118# endif
119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
121# ifndef EV_USE_KQUEUE
122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
127# endif
128
129# if HAVE_PORT_H && HAVE_PORT_CREATE
130# ifndef EV_USE_PORT
131# define EV_USE_PORT EV_FEATURE_BACKENDS
132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
136# endif
137
138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
139# ifndef EV_USE_INOTIFY
140# define EV_USE_INOTIFY EV_FEATURE_OS
141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
145# endif
146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
149# define EV_USE_SIGNALFD EV_FEATURE_OS
150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
154# endif
155
156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
163# endif
164
165#endif
166
31#include <stdlib.h> 167#include <stdlib.h>
32#include <unistd.h> 168#include <string.h>
33#include <fcntl.h> 169#include <fcntl.h>
34#include <signal.h>
35#include <stddef.h> 170#include <stddef.h>
36 171
37#include <stdio.h> 172#include <stdio.h>
38 173
39#include <assert.h> 174#include <assert.h>
40#include <errno.h> 175#include <errno.h>
41#include <sys/types.h> 176#include <sys/types.h>
42#include <sys/wait.h>
43#include <sys/time.h>
44#include <time.h> 177#include <time.h>
178#include <limits.h>
45 179
46#ifndef HAVE_MONOTONIC 180#include <signal.h>
47# ifdef CLOCK_MONOTONIC 181
48# define HAVE_MONOTONIC 1 182#ifdef EV_H
183# include EV_H
184#else
185# include "ev.h"
186#endif
187
188EV_CPP(extern "C" {)
189
190#ifndef _WIN32
191# include <sys/time.h>
192# include <sys/wait.h>
193# include <unistd.h>
194#else
195# include <io.h>
196# define WIN32_LEAN_AND_MEAN
197# include <windows.h>
198# ifndef EV_SELECT_IS_WINSOCKET
199# define EV_SELECT_IS_WINSOCKET 1
49# endif 200# endif
201# undef EV_AVOID_STDIO
202#endif
203
204/* OS X, in its infinite idiocy, actually HARDCODES
205 * a limit of 1024 into their select. Where people have brains,
206 * OS X engineers apparently have a vacuum. Or maybe they were
207 * ordered to have a vacuum, or they do anything for money.
208 * This might help. Or not.
209 */
210#define _DARWIN_UNLIMITED_SELECT 1
211
212/* this block tries to deduce configuration from header-defined symbols and defaults */
213
214/* try to deduce the maximum number of signals on this platform */
215#if defined (EV_NSIG)
216/* use what's provided */
217#elif defined (NSIG)
218# define EV_NSIG (NSIG)
219#elif defined(_NSIG)
220# define EV_NSIG (_NSIG)
221#elif defined (SIGMAX)
222# define EV_NSIG (SIGMAX+1)
223#elif defined (SIG_MAX)
224# define EV_NSIG (SIG_MAX+1)
225#elif defined (_SIG_MAX)
226# define EV_NSIG (_SIG_MAX+1)
227#elif defined (MAXSIG)
228# define EV_NSIG (MAXSIG+1)
229#elif defined (MAX_SIG)
230# define EV_NSIG (MAX_SIG+1)
231#elif defined (SIGARRAYSIZE)
232# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
233#elif defined (_sys_nsig)
234# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
235#else
236# error "unable to find value for NSIG, please report"
237/* to make it compile regardless, just remove the above line, */
238/* but consider reporting it, too! :) */
239# define EV_NSIG 65
240#endif
241
242#ifndef EV_USE_FLOOR
243# define EV_USE_FLOOR 0
244#endif
245
246#ifndef EV_USE_CLOCK_SYSCALL
247# if __linux && __GLIBC__ >= 2
248# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
249# else
250# define EV_USE_CLOCK_SYSCALL 0
50#endif 251# endif
252#endif
51 253
52#ifndef HAVE_SELECT 254#ifndef EV_USE_MONOTONIC
53# define HAVE_SELECT 1 255# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
256# define EV_USE_MONOTONIC EV_FEATURE_OS
257# else
258# define EV_USE_MONOTONIC 0
54#endif 259# endif
260#endif
55 261
56#ifndef HAVE_EPOLL 262#ifndef EV_USE_REALTIME
57# define HAVE_EPOLL 0 263# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
264#endif
265
266#ifndef EV_USE_NANOSLEEP
267# if _POSIX_C_SOURCE >= 199309L
268# define EV_USE_NANOSLEEP EV_FEATURE_OS
269# else
270# define EV_USE_NANOSLEEP 0
58#endif 271# endif
272#endif
59 273
60#ifndef HAVE_REALTIME 274#ifndef EV_USE_SELECT
61# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ 275# define EV_USE_SELECT EV_FEATURE_BACKENDS
276#endif
277
278#ifndef EV_USE_POLL
279# ifdef _WIN32
280# define EV_USE_POLL 0
281# else
282# define EV_USE_POLL EV_FEATURE_BACKENDS
62#endif 283# endif
284#endif
285
286#ifndef EV_USE_EPOLL
287# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
288# define EV_USE_EPOLL EV_FEATURE_BACKENDS
289# else
290# define EV_USE_EPOLL 0
291# endif
292#endif
293
294#ifndef EV_USE_KQUEUE
295# define EV_USE_KQUEUE 0
296#endif
297
298#ifndef EV_USE_PORT
299# define EV_USE_PORT 0
300#endif
301
302#ifndef EV_USE_INOTIFY
303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
304# define EV_USE_INOTIFY EV_FEATURE_OS
305# else
306# define EV_USE_INOTIFY 0
307# endif
308#endif
309
310#ifndef EV_PID_HASHSIZE
311# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
312#endif
313
314#ifndef EV_INOTIFY_HASHSIZE
315# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
316#endif
317
318#ifndef EV_USE_EVENTFD
319# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
320# define EV_USE_EVENTFD EV_FEATURE_OS
321# else
322# define EV_USE_EVENTFD 0
323# endif
324#endif
325
326#ifndef EV_USE_SIGNALFD
327# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
328# define EV_USE_SIGNALFD EV_FEATURE_OS
329# else
330# define EV_USE_SIGNALFD 0
331# endif
332#endif
333
334#if 0 /* debugging */
335# define EV_VERIFY 3
336# define EV_USE_4HEAP 1
337# define EV_HEAP_CACHE_AT 1
338#endif
339
340#ifndef EV_VERIFY
341# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
342#endif
343
344#ifndef EV_USE_4HEAP
345# define EV_USE_4HEAP EV_FEATURE_DATA
346#endif
347
348#ifndef EV_HEAP_CACHE_AT
349# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
350#endif
351
352/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
353/* which makes programs even slower. might work on other unices, too. */
354#if EV_USE_CLOCK_SYSCALL
355# include <syscall.h>
356# ifdef SYS_clock_gettime
357# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
358# undef EV_USE_MONOTONIC
359# define EV_USE_MONOTONIC 1
360# else
361# undef EV_USE_CLOCK_SYSCALL
362# define EV_USE_CLOCK_SYSCALL 0
363# endif
364#endif
365
366/* this block fixes any misconfiguration where we know we run into trouble otherwise */
367
368#ifdef _AIX
369/* AIX has a completely broken poll.h header */
370# undef EV_USE_POLL
371# define EV_USE_POLL 0
372#endif
373
374#ifndef CLOCK_MONOTONIC
375# undef EV_USE_MONOTONIC
376# define EV_USE_MONOTONIC 0
377#endif
378
379#ifndef CLOCK_REALTIME
380# undef EV_USE_REALTIME
381# define EV_USE_REALTIME 0
382#endif
383
384#if !EV_STAT_ENABLE
385# undef EV_USE_INOTIFY
386# define EV_USE_INOTIFY 0
387#endif
388
389#if !EV_USE_NANOSLEEP
390/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux)
392# include <sys/select.h>
393# endif
394#endif
395
396#if EV_USE_INOTIFY
397# include <sys/statfs.h>
398# include <sys/inotify.h>
399/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
400# ifndef IN_DONT_FOLLOW
401# undef EV_USE_INOTIFY
402# define EV_USE_INOTIFY 0
403# endif
404#endif
405
406#if EV_SELECT_IS_WINSOCKET
407# include <winsock.h>
408#endif
409
410#if EV_USE_EVENTFD
411/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
412# include <stdint.h>
413# ifndef EFD_NONBLOCK
414# define EFD_NONBLOCK O_NONBLOCK
415# endif
416# ifndef EFD_CLOEXEC
417# ifdef O_CLOEXEC
418# define EFD_CLOEXEC O_CLOEXEC
419# else
420# define EFD_CLOEXEC 02000000
421# endif
422# endif
423EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
424#endif
425
426#if EV_USE_SIGNALFD
427/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
428# include <stdint.h>
429# ifndef SFD_NONBLOCK
430# define SFD_NONBLOCK O_NONBLOCK
431# endif
432# ifndef SFD_CLOEXEC
433# ifdef O_CLOEXEC
434# define SFD_CLOEXEC O_CLOEXEC
435# else
436# define SFD_CLOEXEC 02000000
437# endif
438# endif
439EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
440
441struct signalfd_siginfo
442{
443 uint32_t ssi_signo;
444 char pad[128 - sizeof (uint32_t)];
445};
446#endif
447
448/**/
449
450#if EV_VERIFY >= 3
451# define EV_FREQUENT_CHECK ev_verify (EV_A)
452#else
453# define EV_FREQUENT_CHECK do { } while (0)
454#endif
455
456/*
457 * This is used to work around floating point rounding problems.
458 * This value is good at least till the year 4000.
459 */
460#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
461/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
63 462
64#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 463#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65#define MAX_BLOCKTIME 60. 464#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
66#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */
67 465
68#include "ev.h" 466#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
467#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
69 468
469#if __GNUC__ >= 4
470# define expect(expr,value) __builtin_expect ((expr),(value))
471# define noinline __attribute__ ((noinline))
472#else
473# define expect(expr,value) (expr)
474# define noinline
475# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
476# define inline
477# endif
478#endif
479
480#define expect_false(expr) expect ((expr) != 0, 0)
481#define expect_true(expr) expect ((expr) != 0, 1)
482#define inline_size static inline
483
484#if EV_FEATURE_CODE
485# define inline_speed static inline
486#else
487# define inline_speed static noinline
488#endif
489
490#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
491
492#if EV_MINPRI == EV_MAXPRI
493# define ABSPRI(w) (((W)w), 0)
494#else
495# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
496#endif
497
498#define EMPTY /* required for microsofts broken pseudo-c compiler */
499#define EMPTY2(a,b) /* used to suppress some warnings */
500
70typedef struct ev_watcher *W; 501typedef ev_watcher *W;
71typedef struct ev_watcher_list *WL; 502typedef ev_watcher_list *WL;
72typedef struct ev_watcher_time *WT; 503typedef ev_watcher_time *WT;
73 504
74static ev_tstamp now, diff; /* monotonic clock */ 505#define ev_active(w) ((W)(w))->active
75ev_tstamp ev_now; 506#define ev_at(w) ((WT)(w))->at
76int ev_method;
77 507
78static int have_monotonic; /* runtime */ 508#if EV_USE_REALTIME
509/* sig_atomic_t is used to avoid per-thread variables or locking but still */
510/* giving it a reasonably high chance of working on typical architectures */
511static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
512#endif
79 513
80static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 514#if EV_USE_MONOTONIC
81static void (*method_modify)(int fd, int oev, int nev); 515static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
82static void (*method_poll)(ev_tstamp timeout); 516#endif
517
518#ifndef EV_FD_TO_WIN32_HANDLE
519# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
520#endif
521#ifndef EV_WIN32_HANDLE_TO_FD
522# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
523#endif
524#ifndef EV_WIN32_CLOSE_FD
525# define EV_WIN32_CLOSE_FD(fd) close (fd)
526#endif
527
528#ifdef _WIN32
529# include "ev_win32.c"
530#endif
83 531
84/*****************************************************************************/ 532/*****************************************************************************/
85 533
534/* define a suitable floor function (only used by periodics atm) */
535
536#if EV_USE_FLOOR
537# include <math.h>
538# define ev_floor(v) floor (v)
539#else
540
541#include <float.h>
542
543/* a floor() replacement function, should be independent of ev_tstamp type */
544static ev_tstamp noinline
545ev_floor (ev_tstamp v)
546{
547 /* the choice of shift factor is not terribly important */
548#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
549 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
550#else
551 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
552#endif
553
554 /* argument too large for an unsigned long? */
555 if (expect_false (v >= shift))
556 {
557 ev_tstamp f;
558
559 if (v == v - 1.)
560 return v; /* very large number */
561
562 f = shift * ev_floor (v * (1. / shift));
563 return f + ev_floor (v - f);
564 }
565
566 /* special treatment for negative args? */
567 if (expect_false (v < 0.))
568 {
569 ev_tstamp f = -ev_floor (-v);
570
571 return f - (f == v ? 0 : 1);
572 }
573
574 /* fits into an unsigned long */
575 return (unsigned long)v;
576}
577
578#endif
579
580/*****************************************************************************/
581
582#ifdef __linux
583# include <sys/utsname.h>
584#endif
585
586static unsigned int noinline
587ev_linux_version (void)
588{
589#ifdef __linux
590 unsigned int v = 0;
591 struct utsname buf;
592 int i;
593 char *p = buf.release;
594
595 if (uname (&buf))
596 return 0;
597
598 for (i = 3+1; --i; )
599 {
600 unsigned int c = 0;
601
602 for (;;)
603 {
604 if (*p >= '0' && *p <= '9')
605 c = c * 10 + *p++ - '0';
606 else
607 {
608 p += *p == '.';
609 break;
610 }
611 }
612
613 v = (v << 8) | c;
614 }
615
616 return v;
617#else
618 return 0;
619#endif
620}
621
622/*****************************************************************************/
623
624#if EV_AVOID_STDIO
625static void noinline
626ev_printerr (const char *msg)
627{
628 write (STDERR_FILENO, msg, strlen (msg));
629}
630#endif
631
632static void (*syserr_cb)(const char *msg);
633
634void
635ev_set_syserr_cb (void (*cb)(const char *msg))
636{
637 syserr_cb = cb;
638}
639
640static void noinline
641ev_syserr (const char *msg)
642{
643 if (!msg)
644 msg = "(libev) system error";
645
646 if (syserr_cb)
647 syserr_cb (msg);
648 else
649 {
650#if EV_AVOID_STDIO
651 ev_printerr (msg);
652 ev_printerr (": ");
653 ev_printerr (strerror (errno));
654 ev_printerr ("\n");
655#else
656 perror (msg);
657#endif
658 abort ();
659 }
660}
661
662static void *
663ev_realloc_emul (void *ptr, long size)
664{
665#if __GLIBC__
666 return realloc (ptr, size);
667#else
668 /* some systems, notably openbsd and darwin, fail to properly
669 * implement realloc (x, 0) (as required by both ansi c-89 and
670 * the single unix specification, so work around them here.
671 */
672
673 if (size)
674 return realloc (ptr, size);
675
676 free (ptr);
677 return 0;
678#endif
679}
680
681static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
682
683void
684ev_set_allocator (void *(*cb)(void *ptr, long size))
685{
686 alloc = cb;
687}
688
689inline_speed void *
690ev_realloc (void *ptr, long size)
691{
692 ptr = alloc (ptr, size);
693
694 if (!ptr && size)
695 {
696#if EV_AVOID_STDIO
697 ev_printerr ("(libev) memory allocation failed, aborting.\n");
698#else
699 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
700#endif
701 abort ();
702 }
703
704 return ptr;
705}
706
707#define ev_malloc(size) ev_realloc (0, (size))
708#define ev_free(ptr) ev_realloc ((ptr), 0)
709
710/*****************************************************************************/
711
712/* set in reify when reification needed */
713#define EV_ANFD_REIFY 1
714
715/* file descriptor info structure */
716typedef struct
717{
718 WL head;
719 unsigned char events; /* the events watched for */
720 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
721 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
722 unsigned char unused;
723#if EV_USE_EPOLL
724 unsigned int egen; /* generation counter to counter epoll bugs */
725#endif
726#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
727 SOCKET handle;
728#endif
729#if EV_USE_IOCP
730 OVERLAPPED or, ow;
731#endif
732} ANFD;
733
734/* stores the pending event set for a given watcher */
735typedef struct
736{
737 W w;
738 int events; /* the pending event set for the given watcher */
739} ANPENDING;
740
741#if EV_USE_INOTIFY
742/* hash table entry per inotify-id */
743typedef struct
744{
745 WL head;
746} ANFS;
747#endif
748
749/* Heap Entry */
750#if EV_HEAP_CACHE_AT
751 /* a heap element */
752 typedef struct {
753 ev_tstamp at;
754 WT w;
755 } ANHE;
756
757 #define ANHE_w(he) (he).w /* access watcher, read-write */
758 #define ANHE_at(he) (he).at /* access cached at, read-only */
759 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
760#else
761 /* a heap element */
762 typedef WT ANHE;
763
764 #define ANHE_w(he) (he)
765 #define ANHE_at(he) (he)->at
766 #define ANHE_at_cache(he)
767#endif
768
769#if EV_MULTIPLICITY
770
771 struct ev_loop
772 {
773 ev_tstamp ev_rt_now;
774 #define ev_rt_now ((loop)->ev_rt_now)
775 #define VAR(name,decl) decl;
776 #include "ev_vars.h"
777 #undef VAR
778 };
779 #include "ev_wrap.h"
780
781 static struct ev_loop default_loop_struct;
782 struct ev_loop *ev_default_loop_ptr;
783
784#else
785
786 ev_tstamp ev_rt_now;
787 #define VAR(name,decl) static decl;
788 #include "ev_vars.h"
789 #undef VAR
790
791 static int ev_default_loop_ptr;
792
793#endif
794
795#if EV_FEATURE_API
796# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
797# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
798# define EV_INVOKE_PENDING invoke_cb (EV_A)
799#else
800# define EV_RELEASE_CB (void)0
801# define EV_ACQUIRE_CB (void)0
802# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
803#endif
804
805#define EVBREAK_RECURSE 0x80
806
807/*****************************************************************************/
808
809#ifndef EV_HAVE_EV_TIME
86ev_tstamp 810ev_tstamp
87ev_time (void) 811ev_time (void)
88{ 812{
89#if HAVE_REALTIME 813#if EV_USE_REALTIME
814 if (expect_true (have_realtime))
815 {
90 struct timespec ts; 816 struct timespec ts;
91 clock_gettime (CLOCK_REALTIME, &ts); 817 clock_gettime (CLOCK_REALTIME, &ts);
92 return ts.tv_sec + ts.tv_nsec * 1e-9; 818 return ts.tv_sec + ts.tv_nsec * 1e-9;
93#else 819 }
820#endif
821
94 struct timeval tv; 822 struct timeval tv;
95 gettimeofday (&tv, 0); 823 gettimeofday (&tv, 0);
96 return tv.tv_sec + tv.tv_usec * 1e-6; 824 return tv.tv_sec + tv.tv_usec * 1e-6;
97#endif
98} 825}
826#endif
99 827
100static ev_tstamp 828inline_size ev_tstamp
101get_clock (void) 829get_clock (void)
102{ 830{
103#if HAVE_MONOTONIC 831#if EV_USE_MONOTONIC
104 if (have_monotonic) 832 if (expect_true (have_monotonic))
105 { 833 {
106 struct timespec ts; 834 struct timespec ts;
107 clock_gettime (CLOCK_MONOTONIC, &ts); 835 clock_gettime (CLOCK_MONOTONIC, &ts);
108 return ts.tv_sec + ts.tv_nsec * 1e-9; 836 return ts.tv_sec + ts.tv_nsec * 1e-9;
109 } 837 }
110#endif 838#endif
111 839
112 return ev_time (); 840 return ev_time ();
113} 841}
114 842
115#define array_needsize(base,cur,cnt,init) \ 843#if EV_MULTIPLICITY
116 if ((cnt) > cur) \ 844ev_tstamp
117 { \ 845ev_now (EV_P)
118 int newcnt = cur ? cur << 1 : 16; \ 846{
119 base = realloc (base, sizeof (*base) * (newcnt)); \ 847 return ev_rt_now;
120 init (base + cur, newcnt - cur); \ 848}
121 cur = newcnt; \ 849#endif
850
851void
852ev_sleep (ev_tstamp delay)
853{
854 if (delay > 0.)
122 } 855 {
856#if EV_USE_NANOSLEEP
857 struct timespec ts;
858
859 EV_TS_SET (ts, delay);
860 nanosleep (&ts, 0);
861#elif defined(_WIN32)
862 Sleep ((unsigned long)(delay * 1e3));
863#else
864 struct timeval tv;
865
866 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
867 /* something not guaranteed by newer posix versions, but guaranteed */
868 /* by older ones */
869 EV_TV_SET (tv, delay);
870 select (0, 0, 0, 0, &tv);
871#endif
872 }
873}
874
875inline_speed int
876ev_timeout_to_ms (ev_tstamp timeout)
877{
878 int ms = timeout * 1000. + .999999;
879
880 return expect_true (ms) ? ms : timeout < 1e-6 ? 0 : 1;
881}
123 882
124/*****************************************************************************/ 883/*****************************************************************************/
125 884
885#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
886
887/* find a suitable new size for the given array, */
888/* hopefully by rounding to a nice-to-malloc size */
889inline_size int
890array_nextsize (int elem, int cur, int cnt)
891{
892 int ncur = cur + 1;
893
894 do
895 ncur <<= 1;
896 while (cnt > ncur);
897
898 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
899 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
900 {
901 ncur *= elem;
902 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
903 ncur = ncur - sizeof (void *) * 4;
904 ncur /= elem;
905 }
906
907 return ncur;
908}
909
910static noinline void *
911array_realloc (int elem, void *base, int *cur, int cnt)
912{
913 *cur = array_nextsize (elem, *cur, cnt);
914 return ev_realloc (base, elem * *cur);
915}
916
917#define array_init_zero(base,count) \
918 memset ((void *)(base), 0, sizeof (*(base)) * (count))
919
920#define array_needsize(type,base,cur,cnt,init) \
921 if (expect_false ((cnt) > (cur))) \
922 { \
923 int ocur_ = (cur); \
924 (base) = (type *)array_realloc \
925 (sizeof (type), (base), &(cur), (cnt)); \
926 init ((base) + (ocur_), (cur) - ocur_); \
927 }
928
929#if 0
930#define array_slim(type,stem) \
931 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
932 { \
933 stem ## max = array_roundsize (stem ## cnt >> 1); \
934 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
935 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
936 }
937#endif
938
939#define array_free(stem, idx) \
940 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
941
942/*****************************************************************************/
943
944/* dummy callback for pending events */
945static void noinline
946pendingcb (EV_P_ ev_prepare *w, int revents)
947{
948}
949
950void noinline
951ev_feed_event (EV_P_ void *w, int revents)
952{
953 W w_ = (W)w;
954 int pri = ABSPRI (w_);
955
956 if (expect_false (w_->pending))
957 pendings [pri][w_->pending - 1].events |= revents;
958 else
959 {
960 w_->pending = ++pendingcnt [pri];
961 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
962 pendings [pri][w_->pending - 1].w = w_;
963 pendings [pri][w_->pending - 1].events = revents;
964 }
965}
966
967inline_speed void
968feed_reverse (EV_P_ W w)
969{
970 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
971 rfeeds [rfeedcnt++] = w;
972}
973
974inline_size void
975feed_reverse_done (EV_P_ int revents)
976{
977 do
978 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
979 while (rfeedcnt);
980}
981
982inline_speed void
983queue_events (EV_P_ W *events, int eventcnt, int type)
984{
985 int i;
986
987 for (i = 0; i < eventcnt; ++i)
988 ev_feed_event (EV_A_ events [i], type);
989}
990
991/*****************************************************************************/
992
993inline_speed void
994fd_event_nocheck (EV_P_ int fd, int revents)
995{
996 ANFD *anfd = anfds + fd;
997 ev_io *w;
998
999 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1000 {
1001 int ev = w->events & revents;
1002
1003 if (ev)
1004 ev_feed_event (EV_A_ (W)w, ev);
1005 }
1006}
1007
1008/* do not submit kernel events for fds that have reify set */
1009/* because that means they changed while we were polling for new events */
1010inline_speed void
1011fd_event (EV_P_ int fd, int revents)
1012{
1013 ANFD *anfd = anfds + fd;
1014
1015 if (expect_true (!anfd->reify))
1016 fd_event_nocheck (EV_A_ fd, revents);
1017}
1018
1019void
1020ev_feed_fd_event (EV_P_ int fd, int revents)
1021{
1022 if (fd >= 0 && fd < anfdmax)
1023 fd_event_nocheck (EV_A_ fd, revents);
1024}
1025
1026/* make sure the external fd watch events are in-sync */
1027/* with the kernel/libev internal state */
1028inline_size void
1029fd_reify (EV_P)
1030{
1031 int i;
1032
1033#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1034 for (i = 0; i < fdchangecnt; ++i)
1035 {
1036 int fd = fdchanges [i];
1037 ANFD *anfd = anfds + fd;
1038
1039 if (anfd->reify & EV__IOFDSET)
1040 {
1041 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1042
1043 if (handle != anfd->handle)
1044 {
1045 unsigned long arg;
1046
1047 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1048
1049 /* handle changed, but fd didn't - we need to do it in two steps */
1050 backend_modify (EV_A_ fd, anfd->events, 0);
1051 anfd->events = 0;
1052 anfd->handle = handle;
1053 }
1054 }
1055 }
1056#endif
1057
1058 for (i = 0; i < fdchangecnt; ++i)
1059 {
1060 int fd = fdchanges [i];
1061 ANFD *anfd = anfds + fd;
1062 ev_io *w;
1063
1064 unsigned char o_events = anfd->events;
1065 unsigned char o_reify = anfd->reify;
1066
1067 anfd->reify = 0;
1068
1069 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1070 {
1071 anfd->events = 0;
1072
1073 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1074 anfd->events |= (unsigned char)w->events;
1075
1076 if (o_events != anfd->events)
1077 o_reify = EV__IOFDSET; /* actually |= */
1078 }
1079
1080 if (o_reify & EV__IOFDSET)
1081 backend_modify (EV_A_ fd, o_events, anfd->events);
1082 }
1083
1084 fdchangecnt = 0;
1085}
1086
1087/* something about the given fd changed */
1088inline_size void
1089fd_change (EV_P_ int fd, int flags)
1090{
1091 unsigned char reify = anfds [fd].reify;
1092 anfds [fd].reify |= flags;
1093
1094 if (expect_true (!reify))
1095 {
1096 ++fdchangecnt;
1097 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
1098 fdchanges [fdchangecnt - 1] = fd;
1099 }
1100}
1101
1102/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1103inline_speed void
1104fd_kill (EV_P_ int fd)
1105{
1106 ev_io *w;
1107
1108 while ((w = (ev_io *)anfds [fd].head))
1109 {
1110 ev_io_stop (EV_A_ w);
1111 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1112 }
1113}
1114
1115/* check whether the given fd is actually valid, for error recovery */
1116inline_size int
1117fd_valid (int fd)
1118{
1119#ifdef _WIN32
1120 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1121#else
1122 return fcntl (fd, F_GETFD) != -1;
1123#endif
1124}
1125
1126/* called on EBADF to verify fds */
1127static void noinline
1128fd_ebadf (EV_P)
1129{
1130 int fd;
1131
1132 for (fd = 0; fd < anfdmax; ++fd)
1133 if (anfds [fd].events)
1134 if (!fd_valid (fd) && errno == EBADF)
1135 fd_kill (EV_A_ fd);
1136}
1137
1138/* called on ENOMEM in select/poll to kill some fds and retry */
1139static void noinline
1140fd_enomem (EV_P)
1141{
1142 int fd;
1143
1144 for (fd = anfdmax; fd--; )
1145 if (anfds [fd].events)
1146 {
1147 fd_kill (EV_A_ fd);
1148 break;
1149 }
1150}
1151
1152/* usually called after fork if backend needs to re-arm all fds from scratch */
1153static void noinline
1154fd_rearm_all (EV_P)
1155{
1156 int fd;
1157
1158 for (fd = 0; fd < anfdmax; ++fd)
1159 if (anfds [fd].events)
1160 {
1161 anfds [fd].events = 0;
1162 anfds [fd].emask = 0;
1163 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1164 }
1165}
1166
1167/* used to prepare libev internal fd's */
1168/* this is not fork-safe */
1169inline_speed void
1170fd_intern (int fd)
1171{
1172#ifdef _WIN32
1173 unsigned long arg = 1;
1174 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1175#else
1176 fcntl (fd, F_SETFD, FD_CLOEXEC);
1177 fcntl (fd, F_SETFL, O_NONBLOCK);
1178#endif
1179}
1180
1181/*****************************************************************************/
1182
1183/*
1184 * the heap functions want a real array index. array index 0 is guaranteed to not
1185 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1186 * the branching factor of the d-tree.
1187 */
1188
1189/*
1190 * at the moment we allow libev the luxury of two heaps,
1191 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1192 * which is more cache-efficient.
1193 * the difference is about 5% with 50000+ watchers.
1194 */
1195#if EV_USE_4HEAP
1196
1197#define DHEAP 4
1198#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1199#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1200#define UPHEAP_DONE(p,k) ((p) == (k))
1201
1202/* away from the root */
1203inline_speed void
1204downheap (ANHE *heap, int N, int k)
1205{
1206 ANHE he = heap [k];
1207 ANHE *E = heap + N + HEAP0;
1208
1209 for (;;)
1210 {
1211 ev_tstamp minat;
1212 ANHE *minpos;
1213 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1214
1215 /* find minimum child */
1216 if (expect_true (pos + DHEAP - 1 < E))
1217 {
1218 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1219 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1220 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1221 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1222 }
1223 else if (pos < E)
1224 {
1225 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1226 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1227 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1228 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1229 }
1230 else
1231 break;
1232
1233 if (ANHE_at (he) <= minat)
1234 break;
1235
1236 heap [k] = *minpos;
1237 ev_active (ANHE_w (*minpos)) = k;
1238
1239 k = minpos - heap;
1240 }
1241
1242 heap [k] = he;
1243 ev_active (ANHE_w (he)) = k;
1244}
1245
1246#else /* 4HEAP */
1247
1248#define HEAP0 1
1249#define HPARENT(k) ((k) >> 1)
1250#define UPHEAP_DONE(p,k) (!(p))
1251
1252/* away from the root */
1253inline_speed void
1254downheap (ANHE *heap, int N, int k)
1255{
1256 ANHE he = heap [k];
1257
1258 for (;;)
1259 {
1260 int c = k << 1;
1261
1262 if (c >= N + HEAP0)
1263 break;
1264
1265 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1266 ? 1 : 0;
1267
1268 if (ANHE_at (he) <= ANHE_at (heap [c]))
1269 break;
1270
1271 heap [k] = heap [c];
1272 ev_active (ANHE_w (heap [k])) = k;
1273
1274 k = c;
1275 }
1276
1277 heap [k] = he;
1278 ev_active (ANHE_w (he)) = k;
1279}
1280#endif
1281
1282/* towards the root */
1283inline_speed void
1284upheap (ANHE *heap, int k)
1285{
1286 ANHE he = heap [k];
1287
1288 for (;;)
1289 {
1290 int p = HPARENT (k);
1291
1292 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1293 break;
1294
1295 heap [k] = heap [p];
1296 ev_active (ANHE_w (heap [k])) = k;
1297 k = p;
1298 }
1299
1300 heap [k] = he;
1301 ev_active (ANHE_w (he)) = k;
1302}
1303
1304/* move an element suitably so it is in a correct place */
1305inline_size void
1306adjustheap (ANHE *heap, int N, int k)
1307{
1308 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1309 upheap (heap, k);
1310 else
1311 downheap (heap, N, k);
1312}
1313
1314/* rebuild the heap: this function is used only once and executed rarely */
1315inline_size void
1316reheap (ANHE *heap, int N)
1317{
1318 int i;
1319
1320 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1321 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1322 for (i = 0; i < N; ++i)
1323 upheap (heap, i + HEAP0);
1324}
1325
1326/*****************************************************************************/
1327
1328/* associate signal watchers to a signal signal */
126typedef struct 1329typedef struct
127{ 1330{
128 struct ev_io *head; 1331 EV_ATOMIC_T pending;
129 unsigned char wev, rev; /* want, received event set */ 1332#if EV_MULTIPLICITY
130} ANFD; 1333 EV_P;
1334#endif
1335 WL head;
1336} ANSIG;
131 1337
132static ANFD *anfds; 1338static ANSIG signals [EV_NSIG - 1];
133static int anfdmax;
134 1339
135static int *fdchanges; 1340/*****************************************************************************/
136static int fdchangemax, fdchangecnt;
137 1341
1342#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1343
1344static void noinline
1345evpipe_init (EV_P)
1346{
1347 if (!ev_is_active (&pipe_w))
1348 {
1349# if EV_USE_EVENTFD
1350 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1351 if (evfd < 0 && errno == EINVAL)
1352 evfd = eventfd (0, 0);
1353
1354 if (evfd >= 0)
1355 {
1356 evpipe [0] = -1;
1357 fd_intern (evfd); /* doing it twice doesn't hurt */
1358 ev_io_set (&pipe_w, evfd, EV_READ);
1359 }
1360 else
1361# endif
1362 {
1363 while (pipe (evpipe))
1364 ev_syserr ("(libev) error creating signal/async pipe");
1365
1366 fd_intern (evpipe [0]);
1367 fd_intern (evpipe [1]);
1368 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1369 }
1370
1371 ev_io_start (EV_A_ &pipe_w);
1372 ev_unref (EV_A); /* watcher should not keep loop alive */
1373 }
1374}
1375
1376inline_size void
1377evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1378{
1379 if (!*flag)
1380 {
1381 int old_errno = errno; /* save errno because write might clobber it */
1382 char dummy;
1383
1384 *flag = 1;
1385
1386#if EV_USE_EVENTFD
1387 if (evfd >= 0)
1388 {
1389 uint64_t counter = 1;
1390 write (evfd, &counter, sizeof (uint64_t));
1391 }
1392 else
1393#endif
1394 /* win32 people keep sending patches that change this write() to send() */
1395 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1396 /* so when you think this write should be a send instead, please find out */
1397 /* where your send() is from - it's definitely not the microsoft send, and */
1398 /* tell me. thank you. */
1399 write (evpipe [1], &dummy, 1);
1400
1401 errno = old_errno;
1402 }
1403}
1404
1405/* called whenever the libev signal pipe */
1406/* got some events (signal, async) */
138static void 1407static void
139anfds_init (ANFD *base, int count) 1408pipecb (EV_P_ ev_io *iow, int revents)
140{ 1409{
141 while (count--) 1410 int i;
142 { 1411
143 base->head = 0; 1412#if EV_USE_EVENTFD
144 base->wev = base->rev = EV_NONE; 1413 if (evfd >= 0)
145 ++base;
146 } 1414 {
147} 1415 uint64_t counter;
1416 read (evfd, &counter, sizeof (uint64_t));
1417 }
1418 else
1419#endif
1420 {
1421 char dummy;
1422 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1423 read (evpipe [0], &dummy, 1);
1424 }
148 1425
149typedef struct 1426#if EV_SIGNAL_ENABLE
150{ 1427 if (sig_pending)
151 W w; 1428 {
152 int events; 1429 sig_pending = 0;
153} ANPENDING;
154 1430
155static ANPENDING *pendings; 1431 for (i = EV_NSIG - 1; i--; )
156static int pendingmax, pendingcnt; 1432 if (expect_false (signals [i].pending))
1433 ev_feed_signal_event (EV_A_ i + 1);
1434 }
1435#endif
1436
1437#if EV_ASYNC_ENABLE
1438 if (async_pending)
1439 {
1440 async_pending = 0;
1441
1442 for (i = asynccnt; i--; )
1443 if (asyncs [i]->sent)
1444 {
1445 asyncs [i]->sent = 0;
1446 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1447 }
1448 }
1449#endif
1450}
1451
1452/*****************************************************************************/
1453
1454void
1455ev_feed_signal (int signum)
1456{
1457#if EV_MULTIPLICITY
1458 EV_P = signals [signum - 1].loop;
1459
1460 if (!EV_A)
1461 return;
1462#endif
1463
1464 signals [signum - 1].pending = 1;
1465 evpipe_write (EV_A_ &sig_pending);
1466}
157 1467
158static void 1468static void
159event (W w, int events) 1469ev_sighandler (int signum)
160{ 1470{
161 if (w->active) 1471#ifdef _WIN32
162 { 1472 signal (signum, ev_sighandler);
163 w->pending = ++pendingcnt; 1473#endif
164 array_needsize (pendings, pendingmax, pendingcnt, );
165 pendings [pendingcnt - 1].w = w;
166 pendings [pendingcnt - 1].events = events;
167 }
168}
169 1474
1475 ev_feed_signal (signum);
1476}
1477
1478void noinline
1479ev_feed_signal_event (EV_P_ int signum)
1480{
1481 WL w;
1482
1483 if (expect_false (signum <= 0 || signum > EV_NSIG))
1484 return;
1485
1486 --signum;
1487
1488#if EV_MULTIPLICITY
1489 /* it is permissible to try to feed a signal to the wrong loop */
1490 /* or, likely more useful, feeding a signal nobody is waiting for */
1491
1492 if (expect_false (signals [signum].loop != EV_A))
1493 return;
1494#endif
1495
1496 signals [signum].pending = 0;
1497
1498 for (w = signals [signum].head; w; w = w->next)
1499 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1500}
1501
1502#if EV_USE_SIGNALFD
170static void 1503static void
171fd_event (int fd, int events) 1504sigfdcb (EV_P_ ev_io *iow, int revents)
172{ 1505{
173 ANFD *anfd = anfds + fd; 1506 struct signalfd_siginfo si[2], *sip; /* these structs are big */
174 struct ev_io *w;
175 1507
176 for (w = anfd->head; w; w = w->next) 1508 for (;;)
177 {
178 int ev = w->events & events;
179
180 if (ev)
181 event ((W)w, ev);
182 } 1509 {
183} 1510 ssize_t res = read (sigfd, si, sizeof (si));
184 1511
185static void 1512 /* not ISO-C, as res might be -1, but works with SuS */
186queue_events (W *events, int eventcnt, int type) 1513 for (sip = si; (char *)sip < (char *)si + res; ++sip)
187{ 1514 ev_feed_signal_event (EV_A_ sip->ssi_signo);
188 int i;
189 1515
190 for (i = 0; i < eventcnt; ++i) 1516 if (res < (ssize_t)sizeof (si))
191 event (events [i], type); 1517 break;
1518 }
192} 1519}
1520#endif
193 1521
194/* called on EBADF to verify fds */ 1522#endif
195static void
196fd_recheck ()
197{
198 int fd;
199
200 for (fd = 0; fd < anfdmax; ++fd)
201 if (anfds [fd].wev)
202 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
203 while (anfds [fd].head)
204 evio_stop (anfds [fd].head);
205}
206 1523
207/*****************************************************************************/ 1524/*****************************************************************************/
208 1525
209static struct ev_timer **timers; 1526#if EV_CHILD_ENABLE
210static int timermax, timercnt; 1527static WL childs [EV_PID_HASHSIZE];
211 1528
212static struct ev_periodic **periodics;
213static int periodicmax, periodiccnt;
214
215static void
216upheap (WT *timers, int k)
217{
218 WT w = timers [k];
219
220 while (k && timers [k >> 1]->at > w->at)
221 {
222 timers [k] = timers [k >> 1];
223 timers [k]->active = k + 1;
224 k >>= 1;
225 }
226
227 timers [k] = w;
228 timers [k]->active = k + 1;
229
230}
231
232static void
233downheap (WT *timers, int N, int k)
234{
235 WT w = timers [k];
236
237 while (k < (N >> 1))
238 {
239 int j = k << 1;
240
241 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
242 ++j;
243
244 if (w->at <= timers [j]->at)
245 break;
246
247 timers [k] = timers [j];
248 timers [k]->active = k + 1;
249 k = j;
250 }
251
252 timers [k] = w;
253 timers [k]->active = k + 1;
254}
255
256/*****************************************************************************/
257
258typedef struct
259{
260 struct ev_signal *head;
261 sig_atomic_t gotsig;
262} ANSIG;
263
264static ANSIG *signals;
265static int signalmax;
266
267static int sigpipe [2];
268static sig_atomic_t gotsig;
269static struct ev_io sigev;
270
271static void
272signals_init (ANSIG *base, int count)
273{
274 while (count--)
275 {
276 base->head = 0;
277 base->gotsig = 0;
278 ++base;
279 }
280}
281
282static void
283sighandler (int signum)
284{
285 signals [signum - 1].gotsig = 1;
286
287 if (!gotsig)
288 {
289 gotsig = 1;
290 write (sigpipe [1], &gotsig, 1);
291 }
292}
293
294static void
295sigcb (struct ev_io *iow, int revents)
296{
297 struct ev_signal *w;
298 int sig;
299
300 gotsig = 0;
301 read (sigpipe [0], &revents, 1);
302
303 for (sig = signalmax; sig--; )
304 if (signals [sig].gotsig)
305 {
306 signals [sig].gotsig = 0;
307
308 for (w = signals [sig].head; w; w = w->next)
309 event ((W)w, EV_SIGNAL);
310 }
311}
312
313static void
314siginit (void)
315{
316 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
317 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
318
319 /* rather than sort out wether we really need nb, set it */
320 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
321 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
322
323 evio_set (&sigev, sigpipe [0], EV_READ);
324 evio_start (&sigev);
325}
326
327/*****************************************************************************/
328
329static struct ev_idle **idles;
330static int idlemax, idlecnt;
331
332static struct ev_prepare **prepares;
333static int preparemax, preparecnt;
334
335static struct ev_check **checks;
336static int checkmax, checkcnt;
337
338/*****************************************************************************/
339
340static struct ev_child *childs [PID_HASHSIZE];
341static struct ev_signal childev; 1529static ev_signal childev;
1530
1531#ifndef WIFCONTINUED
1532# define WIFCONTINUED(status) 0
1533#endif
1534
1535/* handle a single child status event */
1536inline_speed void
1537child_reap (EV_P_ int chain, int pid, int status)
1538{
1539 ev_child *w;
1540 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1541
1542 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1543 {
1544 if ((w->pid == pid || !w->pid)
1545 && (!traced || (w->flags & 1)))
1546 {
1547 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1548 w->rpid = pid;
1549 w->rstatus = status;
1550 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1551 }
1552 }
1553}
342 1554
343#ifndef WCONTINUED 1555#ifndef WCONTINUED
344# define WCONTINUED 0 1556# define WCONTINUED 0
345#endif 1557#endif
346 1558
1559/* called on sigchld etc., calls waitpid */
347static void 1560static void
348childcb (struct ev_signal *sw, int revents) 1561childcb (EV_P_ ev_signal *sw, int revents)
349{ 1562{
350 struct ev_child *w;
351 int pid, status; 1563 int pid, status;
352 1564
1565 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
353 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1566 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
354 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1567 if (!WCONTINUED
355 if (w->pid == pid || w->pid == -1) 1568 || errno != EINVAL
1569 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1570 return;
1571
1572 /* make sure we are called again until all children have been reaped */
1573 /* we need to do it this way so that the callback gets called before we continue */
1574 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1575
1576 child_reap (EV_A_ pid, pid, status);
1577 if ((EV_PID_HASHSIZE) > 1)
1578 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1579}
1580
1581#endif
1582
1583/*****************************************************************************/
1584
1585#if EV_USE_IOCP
1586# include "ev_iocp.c"
1587#endif
1588#if EV_USE_PORT
1589# include "ev_port.c"
1590#endif
1591#if EV_USE_KQUEUE
1592# include "ev_kqueue.c"
1593#endif
1594#if EV_USE_EPOLL
1595# include "ev_epoll.c"
1596#endif
1597#if EV_USE_POLL
1598# include "ev_poll.c"
1599#endif
1600#if EV_USE_SELECT
1601# include "ev_select.c"
1602#endif
1603
1604int
1605ev_version_major (void)
1606{
1607 return EV_VERSION_MAJOR;
1608}
1609
1610int
1611ev_version_minor (void)
1612{
1613 return EV_VERSION_MINOR;
1614}
1615
1616/* return true if we are running with elevated privileges and should ignore env variables */
1617int inline_size
1618enable_secure (void)
1619{
1620#ifdef _WIN32
1621 return 0;
1622#else
1623 return getuid () != geteuid ()
1624 || getgid () != getegid ();
1625#endif
1626}
1627
1628unsigned int
1629ev_supported_backends (void)
1630{
1631 unsigned int flags = 0;
1632
1633 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1634 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1635 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1636 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1637 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1638
1639 return flags;
1640}
1641
1642unsigned int
1643ev_recommended_backends (void)
1644{
1645 unsigned int flags = ev_supported_backends ();
1646
1647#ifndef __NetBSD__
1648 /* kqueue is borked on everything but netbsd apparently */
1649 /* it usually doesn't work correctly on anything but sockets and pipes */
1650 flags &= ~EVBACKEND_KQUEUE;
1651#endif
1652#ifdef __APPLE__
1653 /* only select works correctly on that "unix-certified" platform */
1654 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1655 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1656#endif
1657#ifdef __FreeBSD__
1658 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1659#endif
1660
1661 return flags;
1662}
1663
1664unsigned int
1665ev_embeddable_backends (void)
1666{
1667 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1668
1669 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1670 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1671 flags &= ~EVBACKEND_EPOLL;
1672
1673 return flags;
1674}
1675
1676unsigned int
1677ev_backend (EV_P)
1678{
1679 return backend;
1680}
1681
1682#if EV_FEATURE_API
1683unsigned int
1684ev_iteration (EV_P)
1685{
1686 return loop_count;
1687}
1688
1689unsigned int
1690ev_depth (EV_P)
1691{
1692 return loop_depth;
1693}
1694
1695void
1696ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1697{
1698 io_blocktime = interval;
1699}
1700
1701void
1702ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1703{
1704 timeout_blocktime = interval;
1705}
1706
1707void
1708ev_set_userdata (EV_P_ void *data)
1709{
1710 userdata = data;
1711}
1712
1713void *
1714ev_userdata (EV_P)
1715{
1716 return userdata;
1717}
1718
1719void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1720{
1721 invoke_cb = invoke_pending_cb;
1722}
1723
1724void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1725{
1726 release_cb = release;
1727 acquire_cb = acquire;
1728}
1729#endif
1730
1731/* initialise a loop structure, must be zero-initialised */
1732static void noinline
1733loop_init (EV_P_ unsigned int flags)
1734{
1735 if (!backend)
1736 {
1737 origflags = flags;
1738
1739#if EV_USE_REALTIME
1740 if (!have_realtime)
356 { 1741 {
357 w->status = status; 1742 struct timespec ts;
358 event ((W)w, EV_CHILD); 1743
1744 if (!clock_gettime (CLOCK_REALTIME, &ts))
1745 have_realtime = 1;
359 } 1746 }
1747#endif
1748
1749#if EV_USE_MONOTONIC
1750 if (!have_monotonic)
1751 {
1752 struct timespec ts;
1753
1754 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1755 have_monotonic = 1;
1756 }
1757#endif
1758
1759 /* pid check not overridable via env */
1760#ifndef _WIN32
1761 if (flags & EVFLAG_FORKCHECK)
1762 curpid = getpid ();
1763#endif
1764
1765 if (!(flags & EVFLAG_NOENV)
1766 && !enable_secure ()
1767 && getenv ("LIBEV_FLAGS"))
1768 flags = atoi (getenv ("LIBEV_FLAGS"));
1769
1770 ev_rt_now = ev_time ();
1771 mn_now = get_clock ();
1772 now_floor = mn_now;
1773 rtmn_diff = ev_rt_now - mn_now;
1774#if EV_FEATURE_API
1775 invoke_cb = ev_invoke_pending;
1776#endif
1777
1778 io_blocktime = 0.;
1779 timeout_blocktime = 0.;
1780 backend = 0;
1781 backend_fd = -1;
1782 sig_pending = 0;
1783#if EV_ASYNC_ENABLE
1784 async_pending = 0;
1785#endif
1786#if EV_USE_INOTIFY
1787 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1788#endif
1789#if EV_USE_SIGNALFD
1790 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1791#endif
1792
1793 if (!(flags & EVBACKEND_MASK))
1794 flags |= ev_recommended_backends ();
1795
1796#if EV_USE_IOCP
1797 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1798#endif
1799#if EV_USE_PORT
1800 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1801#endif
1802#if EV_USE_KQUEUE
1803 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1804#endif
1805#if EV_USE_EPOLL
1806 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1807#endif
1808#if EV_USE_POLL
1809 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1810#endif
1811#if EV_USE_SELECT
1812 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1813#endif
1814
1815 ev_prepare_init (&pending_w, pendingcb);
1816
1817#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1818 ev_init (&pipe_w, pipecb);
1819 ev_set_priority (&pipe_w, EV_MAXPRI);
1820#endif
1821 }
1822}
1823
1824/* free up a loop structure */
1825void
1826ev_loop_destroy (EV_P)
1827{
1828 int i;
1829
1830#if EV_MULTIPLICITY
1831 /* mimic free (0) */
1832 if (!EV_A)
1833 return;
1834#endif
1835
1836#if EV_CLEANUP_ENABLE
1837 /* queue cleanup watchers (and execute them) */
1838 if (expect_false (cleanupcnt))
1839 {
1840 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1841 EV_INVOKE_PENDING;
1842 }
1843#endif
1844
1845#if EV_CHILD_ENABLE
1846 if (ev_is_active (&childev))
1847 {
1848 ev_ref (EV_A); /* child watcher */
1849 ev_signal_stop (EV_A_ &childev);
1850 }
1851#endif
1852
1853 if (ev_is_active (&pipe_w))
1854 {
1855 /*ev_ref (EV_A);*/
1856 /*ev_io_stop (EV_A_ &pipe_w);*/
1857
1858#if EV_USE_EVENTFD
1859 if (evfd >= 0)
1860 close (evfd);
1861#endif
1862
1863 if (evpipe [0] >= 0)
1864 {
1865 EV_WIN32_CLOSE_FD (evpipe [0]);
1866 EV_WIN32_CLOSE_FD (evpipe [1]);
1867 }
1868 }
1869
1870#if EV_USE_SIGNALFD
1871 if (ev_is_active (&sigfd_w))
1872 close (sigfd);
1873#endif
1874
1875#if EV_USE_INOTIFY
1876 if (fs_fd >= 0)
1877 close (fs_fd);
1878#endif
1879
1880 if (backend_fd >= 0)
1881 close (backend_fd);
1882
1883#if EV_USE_IOCP
1884 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1885#endif
1886#if EV_USE_PORT
1887 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1888#endif
1889#if EV_USE_KQUEUE
1890 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1891#endif
1892#if EV_USE_EPOLL
1893 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1894#endif
1895#if EV_USE_POLL
1896 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1897#endif
1898#if EV_USE_SELECT
1899 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1900#endif
1901
1902 for (i = NUMPRI; i--; )
1903 {
1904 array_free (pending, [i]);
1905#if EV_IDLE_ENABLE
1906 array_free (idle, [i]);
1907#endif
1908 }
1909
1910 ev_free (anfds); anfds = 0; anfdmax = 0;
1911
1912 /* have to use the microsoft-never-gets-it-right macro */
1913 array_free (rfeed, EMPTY);
1914 array_free (fdchange, EMPTY);
1915 array_free (timer, EMPTY);
1916#if EV_PERIODIC_ENABLE
1917 array_free (periodic, EMPTY);
1918#endif
1919#if EV_FORK_ENABLE
1920 array_free (fork, EMPTY);
1921#endif
1922#if EV_CLEANUP_ENABLE
1923 array_free (cleanup, EMPTY);
1924#endif
1925 array_free (prepare, EMPTY);
1926 array_free (check, EMPTY);
1927#if EV_ASYNC_ENABLE
1928 array_free (async, EMPTY);
1929#endif
1930
1931 backend = 0;
1932
1933#if EV_MULTIPLICITY
1934 if (ev_is_default_loop (EV_A))
1935#endif
1936 ev_default_loop_ptr = 0;
1937#if EV_MULTIPLICITY
1938 else
1939 ev_free (EV_A);
1940#endif
1941}
1942
1943#if EV_USE_INOTIFY
1944inline_size void infy_fork (EV_P);
1945#endif
1946
1947inline_size void
1948loop_fork (EV_P)
1949{
1950#if EV_USE_PORT
1951 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1952#endif
1953#if EV_USE_KQUEUE
1954 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1955#endif
1956#if EV_USE_EPOLL
1957 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1958#endif
1959#if EV_USE_INOTIFY
1960 infy_fork (EV_A);
1961#endif
1962
1963 if (ev_is_active (&pipe_w))
1964 {
1965 /* this "locks" the handlers against writing to the pipe */
1966 /* while we modify the fd vars */
1967 sig_pending = 1;
1968#if EV_ASYNC_ENABLE
1969 async_pending = 1;
1970#endif
1971
1972 ev_ref (EV_A);
1973 ev_io_stop (EV_A_ &pipe_w);
1974
1975#if EV_USE_EVENTFD
1976 if (evfd >= 0)
1977 close (evfd);
1978#endif
1979
1980 if (evpipe [0] >= 0)
1981 {
1982 EV_WIN32_CLOSE_FD (evpipe [0]);
1983 EV_WIN32_CLOSE_FD (evpipe [1]);
1984 }
1985
1986#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1987 evpipe_init (EV_A);
1988 /* now iterate over everything, in case we missed something */
1989 pipecb (EV_A_ &pipe_w, EV_READ);
1990#endif
1991 }
1992
1993 postfork = 0;
1994}
1995
1996#if EV_MULTIPLICITY
1997
1998struct ev_loop *
1999ev_loop_new (unsigned int flags)
2000{
2001 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2002
2003 memset (EV_A, 0, sizeof (struct ev_loop));
2004 loop_init (EV_A_ flags);
2005
2006 if (ev_backend (EV_A))
2007 return EV_A;
2008
2009 ev_free (EV_A);
2010 return 0;
2011}
2012
2013#endif /* multiplicity */
2014
2015#if EV_VERIFY
2016static void noinline
2017verify_watcher (EV_P_ W w)
2018{
2019 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2020
2021 if (w->pending)
2022 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2023}
2024
2025static void noinline
2026verify_heap (EV_P_ ANHE *heap, int N)
2027{
2028 int i;
2029
2030 for (i = HEAP0; i < N + HEAP0; ++i)
2031 {
2032 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2033 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2034 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2035
2036 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2037 }
2038}
2039
2040static void noinline
2041array_verify (EV_P_ W *ws, int cnt)
2042{
2043 while (cnt--)
2044 {
2045 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2046 verify_watcher (EV_A_ ws [cnt]);
2047 }
2048}
2049#endif
2050
2051#if EV_FEATURE_API
2052void
2053ev_verify (EV_P)
2054{
2055#if EV_VERIFY
2056 int i;
2057 WL w;
2058
2059 assert (activecnt >= -1);
2060
2061 assert (fdchangemax >= fdchangecnt);
2062 for (i = 0; i < fdchangecnt; ++i)
2063 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2064
2065 assert (anfdmax >= 0);
2066 for (i = 0; i < anfdmax; ++i)
2067 for (w = anfds [i].head; w; w = w->next)
2068 {
2069 verify_watcher (EV_A_ (W)w);
2070 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2071 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2072 }
2073
2074 assert (timermax >= timercnt);
2075 verify_heap (EV_A_ timers, timercnt);
2076
2077#if EV_PERIODIC_ENABLE
2078 assert (periodicmax >= periodiccnt);
2079 verify_heap (EV_A_ periodics, periodiccnt);
2080#endif
2081
2082 for (i = NUMPRI; i--; )
2083 {
2084 assert (pendingmax [i] >= pendingcnt [i]);
2085#if EV_IDLE_ENABLE
2086 assert (idleall >= 0);
2087 assert (idlemax [i] >= idlecnt [i]);
2088 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2089#endif
2090 }
2091
2092#if EV_FORK_ENABLE
2093 assert (forkmax >= forkcnt);
2094 array_verify (EV_A_ (W *)forks, forkcnt);
2095#endif
2096
2097#if EV_CLEANUP_ENABLE
2098 assert (cleanupmax >= cleanupcnt);
2099 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2100#endif
2101
2102#if EV_ASYNC_ENABLE
2103 assert (asyncmax >= asynccnt);
2104 array_verify (EV_A_ (W *)asyncs, asynccnt);
2105#endif
2106
2107#if EV_PREPARE_ENABLE
2108 assert (preparemax >= preparecnt);
2109 array_verify (EV_A_ (W *)prepares, preparecnt);
2110#endif
2111
2112#if EV_CHECK_ENABLE
2113 assert (checkmax >= checkcnt);
2114 array_verify (EV_A_ (W *)checks, checkcnt);
2115#endif
2116
2117# if 0
2118#if EV_CHILD_ENABLE
2119 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2120 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2121#endif
2122# endif
2123#endif
2124}
2125#endif
2126
2127#if EV_MULTIPLICITY
2128struct ev_loop *
2129#else
2130int
2131#endif
2132ev_default_loop (unsigned int flags)
2133{
2134 if (!ev_default_loop_ptr)
2135 {
2136#if EV_MULTIPLICITY
2137 EV_P = ev_default_loop_ptr = &default_loop_struct;
2138#else
2139 ev_default_loop_ptr = 1;
2140#endif
2141
2142 loop_init (EV_A_ flags);
2143
2144 if (ev_backend (EV_A))
2145 {
2146#if EV_CHILD_ENABLE
2147 ev_signal_init (&childev, childcb, SIGCHLD);
2148 ev_set_priority (&childev, EV_MAXPRI);
2149 ev_signal_start (EV_A_ &childev);
2150 ev_unref (EV_A); /* child watcher should not keep loop alive */
2151#endif
2152 }
2153 else
2154 ev_default_loop_ptr = 0;
2155 }
2156
2157 return ev_default_loop_ptr;
2158}
2159
2160void
2161ev_loop_fork (EV_P)
2162{
2163 postfork = 1; /* must be in line with ev_default_fork */
360} 2164}
361 2165
362/*****************************************************************************/ 2166/*****************************************************************************/
363 2167
364#if HAVE_EPOLL 2168void
365# include "ev_epoll.c" 2169ev_invoke (EV_P_ void *w, int revents)
2170{
2171 EV_CB_INVOKE ((W)w, revents);
2172}
2173
2174unsigned int
2175ev_pending_count (EV_P)
2176{
2177 int pri;
2178 unsigned int count = 0;
2179
2180 for (pri = NUMPRI; pri--; )
2181 count += pendingcnt [pri];
2182
2183 return count;
2184}
2185
2186void noinline
2187ev_invoke_pending (EV_P)
2188{
2189 int pri;
2190
2191 for (pri = NUMPRI; pri--; )
2192 while (pendingcnt [pri])
2193 {
2194 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2195
2196 p->w->pending = 0;
2197 EV_CB_INVOKE (p->w, p->events);
2198 EV_FREQUENT_CHECK;
2199 }
2200}
2201
2202#if EV_IDLE_ENABLE
2203/* make idle watchers pending. this handles the "call-idle */
2204/* only when higher priorities are idle" logic */
2205inline_size void
2206idle_reify (EV_P)
2207{
2208 if (expect_false (idleall))
2209 {
2210 int pri;
2211
2212 for (pri = NUMPRI; pri--; )
2213 {
2214 if (pendingcnt [pri])
2215 break;
2216
2217 if (idlecnt [pri])
2218 {
2219 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2220 break;
2221 }
2222 }
2223 }
2224}
2225#endif
2226
2227/* make timers pending */
2228inline_size void
2229timers_reify (EV_P)
2230{
2231 EV_FREQUENT_CHECK;
2232
2233 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2234 {
2235 do
2236 {
2237 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2238
2239 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2240
2241 /* first reschedule or stop timer */
2242 if (w->repeat)
2243 {
2244 ev_at (w) += w->repeat;
2245 if (ev_at (w) < mn_now)
2246 ev_at (w) = mn_now;
2247
2248 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2249
2250 ANHE_at_cache (timers [HEAP0]);
2251 downheap (timers, timercnt, HEAP0);
2252 }
2253 else
2254 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2255
2256 EV_FREQUENT_CHECK;
2257 feed_reverse (EV_A_ (W)w);
2258 }
2259 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2260
2261 feed_reverse_done (EV_A_ EV_TIMER);
2262 }
2263}
2264
2265#if EV_PERIODIC_ENABLE
2266
2267static void noinline
2268periodic_recalc (EV_P_ ev_periodic *w)
2269{
2270 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2271 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2272
2273 /* the above almost always errs on the low side */
2274 while (at <= ev_rt_now)
2275 {
2276 ev_tstamp nat = at + w->interval;
2277
2278 /* when resolution fails us, we use ev_rt_now */
2279 if (expect_false (nat == at))
2280 {
2281 at = ev_rt_now;
2282 break;
2283 }
2284
2285 at = nat;
2286 }
2287
2288 ev_at (w) = at;
2289}
2290
2291/* make periodics pending */
2292inline_size void
2293periodics_reify (EV_P)
2294{
2295 EV_FREQUENT_CHECK;
2296
2297 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2298 {
2299 int feed_count = 0;
2300
2301 do
2302 {
2303 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2304
2305 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2306
2307 /* first reschedule or stop timer */
2308 if (w->reschedule_cb)
2309 {
2310 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2311
2312 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2313
2314 ANHE_at_cache (periodics [HEAP0]);
2315 downheap (periodics, periodiccnt, HEAP0);
2316 }
2317 else if (w->interval)
2318 {
2319 periodic_recalc (EV_A_ w);
2320 ANHE_at_cache (periodics [HEAP0]);
2321 downheap (periodics, periodiccnt, HEAP0);
2322 }
2323 else
2324 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2325
2326 EV_FREQUENT_CHECK;
2327 feed_reverse (EV_A_ (W)w);
2328 }
2329 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2330
2331 feed_reverse_done (EV_A_ EV_PERIODIC);
2332 }
2333}
2334
2335/* simply recalculate all periodics */
2336/* TODO: maybe ensure that at least one event happens when jumping forward? */
2337static void noinline
2338periodics_reschedule (EV_P)
2339{
2340 int i;
2341
2342 /* adjust periodics after time jump */
2343 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2344 {
2345 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2346
2347 if (w->reschedule_cb)
2348 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2349 else if (w->interval)
2350 periodic_recalc (EV_A_ w);
2351
2352 ANHE_at_cache (periodics [i]);
2353 }
2354
2355 reheap (periodics, periodiccnt);
2356}
2357#endif
2358
2359/* adjust all timers by a given offset */
2360static void noinline
2361timers_reschedule (EV_P_ ev_tstamp adjust)
2362{
2363 int i;
2364
2365 for (i = 0; i < timercnt; ++i)
2366 {
2367 ANHE *he = timers + i + HEAP0;
2368 ANHE_w (*he)->at += adjust;
2369 ANHE_at_cache (*he);
2370 }
2371}
2372
2373/* fetch new monotonic and realtime times from the kernel */
2374/* also detect if there was a timejump, and act accordingly */
2375inline_speed void
2376time_update (EV_P_ ev_tstamp max_block)
2377{
2378#if EV_USE_MONOTONIC
2379 if (expect_true (have_monotonic))
2380 {
2381 int i;
2382 ev_tstamp odiff = rtmn_diff;
2383
2384 mn_now = get_clock ();
2385
2386 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2387 /* interpolate in the meantime */
2388 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2389 {
2390 ev_rt_now = rtmn_diff + mn_now;
2391 return;
2392 }
2393
2394 now_floor = mn_now;
2395 ev_rt_now = ev_time ();
2396
2397 /* loop a few times, before making important decisions.
2398 * on the choice of "4": one iteration isn't enough,
2399 * in case we get preempted during the calls to
2400 * ev_time and get_clock. a second call is almost guaranteed
2401 * to succeed in that case, though. and looping a few more times
2402 * doesn't hurt either as we only do this on time-jumps or
2403 * in the unlikely event of having been preempted here.
2404 */
2405 for (i = 4; --i; )
2406 {
2407 ev_tstamp diff;
2408 rtmn_diff = ev_rt_now - mn_now;
2409
2410 diff = odiff - rtmn_diff;
2411
2412 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2413 return; /* all is well */
2414
2415 ev_rt_now = ev_time ();
2416 mn_now = get_clock ();
2417 now_floor = mn_now;
2418 }
2419
2420 /* no timer adjustment, as the monotonic clock doesn't jump */
2421 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2422# if EV_PERIODIC_ENABLE
2423 periodics_reschedule (EV_A);
366#endif 2424# endif
367#if HAVE_SELECT 2425 }
368# include "ev_select.c" 2426 else
369#endif 2427#endif
2428 {
2429 ev_rt_now = ev_time ();
370 2430
371int ev_init (int flags) 2431 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2432 {
2433 /* adjust timers. this is easy, as the offset is the same for all of them */
2434 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2435#if EV_PERIODIC_ENABLE
2436 periodics_reschedule (EV_A);
2437#endif
2438 }
2439
2440 mn_now = ev_rt_now;
2441 }
2442}
2443
2444void
2445ev_run (EV_P_ int flags)
372{ 2446{
373#if HAVE_MONOTONIC 2447#if EV_FEATURE_API
2448 ++loop_depth;
2449#endif
2450
2451 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2452
2453 loop_done = EVBREAK_CANCEL;
2454
2455 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2456
2457 do
2458 {
2459#if EV_VERIFY >= 2
2460 ev_verify (EV_A);
2461#endif
2462
2463#ifndef _WIN32
2464 if (expect_false (curpid)) /* penalise the forking check even more */
2465 if (expect_false (getpid () != curpid))
2466 {
2467 curpid = getpid ();
2468 postfork = 1;
2469 }
2470#endif
2471
2472#if EV_FORK_ENABLE
2473 /* we might have forked, so queue fork handlers */
2474 if (expect_false (postfork))
2475 if (forkcnt)
2476 {
2477 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2478 EV_INVOKE_PENDING;
2479 }
2480#endif
2481
2482#if EV_PREPARE_ENABLE
2483 /* queue prepare watchers (and execute them) */
2484 if (expect_false (preparecnt))
2485 {
2486 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2487 EV_INVOKE_PENDING;
2488 }
2489#endif
2490
2491 if (expect_false (loop_done))
2492 break;
2493
2494 /* we might have forked, so reify kernel state if necessary */
2495 if (expect_false (postfork))
2496 loop_fork (EV_A);
2497
2498 /* update fd-related kernel structures */
2499 fd_reify (EV_A);
2500
2501 /* calculate blocking time */
2502 {
2503 ev_tstamp waittime = 0.;
2504 ev_tstamp sleeptime = 0.;
2505
2506 /* remember old timestamp for io_blocktime calculation */
2507 ev_tstamp prev_mn_now = mn_now;
2508
2509 /* update time to cancel out callback processing overhead */
2510 time_update (EV_A_ 1e100);
2511
2512 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt)))
2513 {
2514 waittime = MAX_BLOCKTIME;
2515
2516 if (timercnt)
2517 {
2518 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
2519 if (waittime > to) waittime = to;
2520 }
2521
2522#if EV_PERIODIC_ENABLE
2523 if (periodiccnt)
2524 {
2525 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2526 if (waittime > to) waittime = to;
2527 }
2528#endif
2529
2530 /* don't let timeouts decrease the waittime below timeout_blocktime */
2531 if (expect_false (waittime < timeout_blocktime))
2532 waittime = timeout_blocktime;
2533
2534 /* extra check because io_blocktime is commonly 0 */
2535 if (expect_false (io_blocktime))
2536 {
2537 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2538
2539 if (sleeptime > waittime - backend_fudge)
2540 sleeptime = waittime - backend_fudge;
2541
2542 if (expect_true (sleeptime > 0.))
2543 {
2544 ev_sleep (sleeptime);
2545 waittime -= sleeptime;
2546 }
2547 }
2548 }
2549
2550#if EV_FEATURE_API
2551 ++loop_count;
2552#endif
2553 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2554 backend_poll (EV_A_ waittime);
2555 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2556
2557 /* update ev_rt_now, do magic */
2558 time_update (EV_A_ waittime + sleeptime);
2559 }
2560
2561 /* queue pending timers and reschedule them */
2562 timers_reify (EV_A); /* relative timers called last */
2563#if EV_PERIODIC_ENABLE
2564 periodics_reify (EV_A); /* absolute timers called first */
2565#endif
2566
2567#if EV_IDLE_ENABLE
2568 /* queue idle watchers unless other events are pending */
2569 idle_reify (EV_A);
2570#endif
2571
2572#if EV_CHECK_ENABLE
2573 /* queue check watchers, to be executed first */
2574 if (expect_false (checkcnt))
2575 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2576#endif
2577
2578 EV_INVOKE_PENDING;
2579 }
2580 while (expect_true (
2581 activecnt
2582 && !loop_done
2583 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2584 ));
2585
2586 if (loop_done == EVBREAK_ONE)
2587 loop_done = EVBREAK_CANCEL;
2588
2589#if EV_FEATURE_API
2590 --loop_depth;
2591#endif
2592}
2593
2594void
2595ev_break (EV_P_ int how)
2596{
2597 loop_done = how;
2598}
2599
2600void
2601ev_ref (EV_P)
2602{
2603 ++activecnt;
2604}
2605
2606void
2607ev_unref (EV_P)
2608{
2609 --activecnt;
2610}
2611
2612void
2613ev_now_update (EV_P)
2614{
2615 time_update (EV_A_ 1e100);
2616}
2617
2618void
2619ev_suspend (EV_P)
2620{
2621 ev_now_update (EV_A);
2622}
2623
2624void
2625ev_resume (EV_P)
2626{
2627 ev_tstamp mn_prev = mn_now;
2628
2629 ev_now_update (EV_A);
2630 timers_reschedule (EV_A_ mn_now - mn_prev);
2631#if EV_PERIODIC_ENABLE
2632 /* TODO: really do this? */
2633 periodics_reschedule (EV_A);
2634#endif
2635}
2636
2637/*****************************************************************************/
2638/* singly-linked list management, used when the expected list length is short */
2639
2640inline_size void
2641wlist_add (WL *head, WL elem)
2642{
2643 elem->next = *head;
2644 *head = elem;
2645}
2646
2647inline_size void
2648wlist_del (WL *head, WL elem)
2649{
2650 while (*head)
2651 {
2652 if (expect_true (*head == elem))
2653 {
2654 *head = elem->next;
2655 break;
2656 }
2657
2658 head = &(*head)->next;
2659 }
2660}
2661
2662/* internal, faster, version of ev_clear_pending */
2663inline_speed void
2664clear_pending (EV_P_ W w)
2665{
2666 if (w->pending)
2667 {
2668 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2669 w->pending = 0;
2670 }
2671}
2672
2673int
2674ev_clear_pending (EV_P_ void *w)
2675{
2676 W w_ = (W)w;
2677 int pending = w_->pending;
2678
2679 if (expect_true (pending))
2680 {
2681 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2682 p->w = (W)&pending_w;
2683 w_->pending = 0;
2684 return p->events;
2685 }
2686 else
2687 return 0;
2688}
2689
2690inline_size void
2691pri_adjust (EV_P_ W w)
2692{
2693 int pri = ev_priority (w);
2694 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2695 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2696 ev_set_priority (w, pri);
2697}
2698
2699inline_speed void
2700ev_start (EV_P_ W w, int active)
2701{
2702 pri_adjust (EV_A_ w);
2703 w->active = active;
2704 ev_ref (EV_A);
2705}
2706
2707inline_size void
2708ev_stop (EV_P_ W w)
2709{
2710 ev_unref (EV_A);
2711 w->active = 0;
2712}
2713
2714/*****************************************************************************/
2715
2716void noinline
2717ev_io_start (EV_P_ ev_io *w)
2718{
2719 int fd = w->fd;
2720
2721 if (expect_false (ev_is_active (w)))
2722 return;
2723
2724 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2725 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2726
2727 EV_FREQUENT_CHECK;
2728
2729 ev_start (EV_A_ (W)w, 1);
2730 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2731 wlist_add (&anfds[fd].head, (WL)w);
2732
2733 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2734 w->events &= ~EV__IOFDSET;
2735
2736 EV_FREQUENT_CHECK;
2737}
2738
2739void noinline
2740ev_io_stop (EV_P_ ev_io *w)
2741{
2742 clear_pending (EV_A_ (W)w);
2743 if (expect_false (!ev_is_active (w)))
2744 return;
2745
2746 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2747
2748 EV_FREQUENT_CHECK;
2749
2750 wlist_del (&anfds[w->fd].head, (WL)w);
2751 ev_stop (EV_A_ (W)w);
2752
2753 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2754
2755 EV_FREQUENT_CHECK;
2756}
2757
2758void noinline
2759ev_timer_start (EV_P_ ev_timer *w)
2760{
2761 if (expect_false (ev_is_active (w)))
2762 return;
2763
2764 ev_at (w) += mn_now;
2765
2766 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2767
2768 EV_FREQUENT_CHECK;
2769
2770 ++timercnt;
2771 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2772 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2773 ANHE_w (timers [ev_active (w)]) = (WT)w;
2774 ANHE_at_cache (timers [ev_active (w)]);
2775 upheap (timers, ev_active (w));
2776
2777 EV_FREQUENT_CHECK;
2778
2779 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2780}
2781
2782void noinline
2783ev_timer_stop (EV_P_ ev_timer *w)
2784{
2785 clear_pending (EV_A_ (W)w);
2786 if (expect_false (!ev_is_active (w)))
2787 return;
2788
2789 EV_FREQUENT_CHECK;
2790
374 { 2791 {
375 struct timespec ts; 2792 int active = ev_active (w);
376 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2793
377 have_monotonic = 1; 2794 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2795
2796 --timercnt;
2797
2798 if (expect_true (active < timercnt + HEAP0))
2799 {
2800 timers [active] = timers [timercnt + HEAP0];
2801 adjustheap (timers, timercnt, active);
2802 }
378 } 2803 }
379#endif
380 2804
381 ev_now = ev_time (); 2805 ev_at (w) -= mn_now;
382 now = get_clock ();
383 diff = ev_now - now;
384 2806
385 if (pipe (sigpipe)) 2807 ev_stop (EV_A_ (W)w);
386 return 0;
387 2808
388 ev_method = EVMETHOD_NONE; 2809 EV_FREQUENT_CHECK;
389#if HAVE_EPOLL 2810}
390 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
391#endif
392#if HAVE_SELECT
393 if (ev_method == EVMETHOD_NONE) select_init (flags);
394#endif
395 2811
396 if (ev_method) 2812void noinline
397 { 2813ev_timer_again (EV_P_ ev_timer *w)
398 evw_init (&sigev, sigcb); 2814{
399 siginit (); 2815 EV_FREQUENT_CHECK;
400 2816
401 evsignal_init (&childev, childcb, SIGCHLD); 2817 if (ev_is_active (w))
402 evsignal_start (&childev);
403 } 2818 {
404
405 return ev_method;
406}
407
408/*****************************************************************************/
409
410void ev_prefork (void)
411{
412 /* nop */
413}
414
415void ev_postfork_parent (void)
416{
417 /* nop */
418}
419
420void ev_postfork_child (void)
421{
422#if HAVE_EPOLL
423 if (ev_method == EVMETHOD_EPOLL)
424 epoll_postfork_child ();
425#endif
426
427 evio_stop (&sigev);
428 close (sigpipe [0]);
429 close (sigpipe [1]);
430 pipe (sigpipe);
431 siginit ();
432}
433
434/*****************************************************************************/
435
436static void
437fd_reify (void)
438{
439 int i;
440
441 for (i = 0; i < fdchangecnt; ++i)
442 {
443 int fd = fdchanges [i];
444 ANFD *anfd = anfds + fd;
445 struct ev_io *w;
446
447 int wev = 0;
448
449 for (w = anfd->head; w; w = w->next)
450 wev |= w->events;
451
452 if (anfd->wev != wev)
453 {
454 method_modify (fd, anfd->wev, wev);
455 anfd->wev = wev;
456 }
457 }
458
459 fdchangecnt = 0;
460}
461
462static void
463call_pending ()
464{
465 while (pendingcnt)
466 {
467 ANPENDING *p = pendings + --pendingcnt;
468
469 if (p->w)
470 {
471 p->w->pending = 0;
472 p->w->cb (p->w, p->events);
473 }
474 }
475}
476
477static void
478timers_reify ()
479{
480 while (timercnt && timers [0]->at <= now)
481 {
482 struct ev_timer *w = timers [0];
483
484 event ((W)w, EV_TIMEOUT);
485
486 /* first reschedule or stop timer */
487 if (w->repeat) 2819 if (w->repeat)
488 { 2820 {
489 w->at = now + w->repeat; 2821 ev_at (w) = mn_now + w->repeat;
490 assert (("timer timeout in the past, negative repeat?", w->at > now)); 2822 ANHE_at_cache (timers [ev_active (w)]);
491 downheap ((WT *)timers, timercnt, 0); 2823 adjustheap (timers, timercnt, ev_active (w));
492 } 2824 }
493 else 2825 else
494 evtimer_stop (w); /* nonrepeating: stop timer */ 2826 ev_timer_stop (EV_A_ w);
495 }
496}
497
498static void
499periodics_reify ()
500{
501 while (periodiccnt && periodics [0]->at <= ev_now)
502 { 2827 }
503 struct ev_periodic *w = periodics [0]; 2828 else if (w->repeat)
2829 {
2830 ev_at (w) = w->repeat;
2831 ev_timer_start (EV_A_ w);
2832 }
504 2833
505 /* first reschedule or stop timer */ 2834 EV_FREQUENT_CHECK;
2835}
2836
2837ev_tstamp
2838ev_timer_remaining (EV_P_ ev_timer *w)
2839{
2840 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2841}
2842
2843#if EV_PERIODIC_ENABLE
2844void noinline
2845ev_periodic_start (EV_P_ ev_periodic *w)
2846{
2847 if (expect_false (ev_is_active (w)))
2848 return;
2849
2850 if (w->reschedule_cb)
2851 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
506 if (w->interval) 2852 else if (w->interval)
2853 {
2854 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2855 periodic_recalc (EV_A_ w);
2856 }
2857 else
2858 ev_at (w) = w->offset;
2859
2860 EV_FREQUENT_CHECK;
2861
2862 ++periodiccnt;
2863 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2864 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2865 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2866 ANHE_at_cache (periodics [ev_active (w)]);
2867 upheap (periodics, ev_active (w));
2868
2869 EV_FREQUENT_CHECK;
2870
2871 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2872}
2873
2874void noinline
2875ev_periodic_stop (EV_P_ ev_periodic *w)
2876{
2877 clear_pending (EV_A_ (W)w);
2878 if (expect_false (!ev_is_active (w)))
2879 return;
2880
2881 EV_FREQUENT_CHECK;
2882
2883 {
2884 int active = ev_active (w);
2885
2886 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2887
2888 --periodiccnt;
2889
2890 if (expect_true (active < periodiccnt + HEAP0))
2891 {
2892 periodics [active] = periodics [periodiccnt + HEAP0];
2893 adjustheap (periodics, periodiccnt, active);
2894 }
2895 }
2896
2897 ev_stop (EV_A_ (W)w);
2898
2899 EV_FREQUENT_CHECK;
2900}
2901
2902void noinline
2903ev_periodic_again (EV_P_ ev_periodic *w)
2904{
2905 /* TODO: use adjustheap and recalculation */
2906 ev_periodic_stop (EV_A_ w);
2907 ev_periodic_start (EV_A_ w);
2908}
2909#endif
2910
2911#ifndef SA_RESTART
2912# define SA_RESTART 0
2913#endif
2914
2915#if EV_SIGNAL_ENABLE
2916
2917void noinline
2918ev_signal_start (EV_P_ ev_signal *w)
2919{
2920 if (expect_false (ev_is_active (w)))
2921 return;
2922
2923 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2924
2925#if EV_MULTIPLICITY
2926 assert (("libev: a signal must not be attached to two different loops",
2927 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2928
2929 signals [w->signum - 1].loop = EV_A;
2930#endif
2931
2932 EV_FREQUENT_CHECK;
2933
2934#if EV_USE_SIGNALFD
2935 if (sigfd == -2)
2936 {
2937 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2938 if (sigfd < 0 && errno == EINVAL)
2939 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2940
2941 if (sigfd >= 0)
507 { 2942 {
508 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 2943 fd_intern (sigfd); /* doing it twice will not hurt */
509 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 2944
510 downheap ((WT *)periodics, periodiccnt, 0); 2945 sigemptyset (&sigfd_set);
2946
2947 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2948 ev_set_priority (&sigfd_w, EV_MAXPRI);
2949 ev_io_start (EV_A_ &sigfd_w);
2950 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2951 }
2952 }
2953
2954 if (sigfd >= 0)
2955 {
2956 /* TODO: check .head */
2957 sigaddset (&sigfd_set, w->signum);
2958 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2959
2960 signalfd (sigfd, &sigfd_set, 0);
2961 }
2962#endif
2963
2964 ev_start (EV_A_ (W)w, 1);
2965 wlist_add (&signals [w->signum - 1].head, (WL)w);
2966
2967 if (!((WL)w)->next)
2968# if EV_USE_SIGNALFD
2969 if (sigfd < 0) /*TODO*/
2970# endif
2971 {
2972# ifdef _WIN32
2973 evpipe_init (EV_A);
2974
2975 signal (w->signum, ev_sighandler);
2976# else
2977 struct sigaction sa;
2978
2979 evpipe_init (EV_A);
2980
2981 sa.sa_handler = ev_sighandler;
2982 sigfillset (&sa.sa_mask);
2983 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2984 sigaction (w->signum, &sa, 0);
2985
2986 if (origflags & EVFLAG_NOSIGMASK)
2987 {
2988 sigemptyset (&sa.sa_mask);
2989 sigaddset (&sa.sa_mask, w->signum);
2990 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2991 }
2992#endif
2993 }
2994
2995 EV_FREQUENT_CHECK;
2996}
2997
2998void noinline
2999ev_signal_stop (EV_P_ ev_signal *w)
3000{
3001 clear_pending (EV_A_ (W)w);
3002 if (expect_false (!ev_is_active (w)))
3003 return;
3004
3005 EV_FREQUENT_CHECK;
3006
3007 wlist_del (&signals [w->signum - 1].head, (WL)w);
3008 ev_stop (EV_A_ (W)w);
3009
3010 if (!signals [w->signum - 1].head)
3011 {
3012#if EV_MULTIPLICITY
3013 signals [w->signum - 1].loop = 0; /* unattach from signal */
3014#endif
3015#if EV_USE_SIGNALFD
3016 if (sigfd >= 0)
3017 {
3018 sigset_t ss;
3019
3020 sigemptyset (&ss);
3021 sigaddset (&ss, w->signum);
3022 sigdelset (&sigfd_set, w->signum);
3023
3024 signalfd (sigfd, &sigfd_set, 0);
3025 sigprocmask (SIG_UNBLOCK, &ss, 0);
511 } 3026 }
512 else 3027 else
513 evperiodic_stop (w); /* nonrepeating: stop timer */ 3028#endif
514 3029 signal (w->signum, SIG_DFL);
515 event ((W)w, EV_TIMEOUT);
516 }
517}
518
519static void
520periodics_reschedule (ev_tstamp diff)
521{
522 int i;
523
524 /* adjust periodics after time jump */
525 for (i = 0; i < periodiccnt; ++i)
526 { 3030 }
527 struct ev_periodic *w = periodics [i];
528 3031
529 if (w->interval) 3032 EV_FREQUENT_CHECK;
3033}
3034
3035#endif
3036
3037#if EV_CHILD_ENABLE
3038
3039void
3040ev_child_start (EV_P_ ev_child *w)
3041{
3042#if EV_MULTIPLICITY
3043 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3044#endif
3045 if (expect_false (ev_is_active (w)))
3046 return;
3047
3048 EV_FREQUENT_CHECK;
3049
3050 ev_start (EV_A_ (W)w, 1);
3051 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3052
3053 EV_FREQUENT_CHECK;
3054}
3055
3056void
3057ev_child_stop (EV_P_ ev_child *w)
3058{
3059 clear_pending (EV_A_ (W)w);
3060 if (expect_false (!ev_is_active (w)))
3061 return;
3062
3063 EV_FREQUENT_CHECK;
3064
3065 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3066 ev_stop (EV_A_ (W)w);
3067
3068 EV_FREQUENT_CHECK;
3069}
3070
3071#endif
3072
3073#if EV_STAT_ENABLE
3074
3075# ifdef _WIN32
3076# undef lstat
3077# define lstat(a,b) _stati64 (a,b)
3078# endif
3079
3080#define DEF_STAT_INTERVAL 5.0074891
3081#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3082#define MIN_STAT_INTERVAL 0.1074891
3083
3084static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3085
3086#if EV_USE_INOTIFY
3087
3088/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3089# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3090
3091static void noinline
3092infy_add (EV_P_ ev_stat *w)
3093{
3094 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);
3095
3096 if (w->wd >= 0)
3097 {
3098 struct statfs sfs;
3099
3100 /* now local changes will be tracked by inotify, but remote changes won't */
3101 /* unless the filesystem is known to be local, we therefore still poll */
3102 /* also do poll on <2.6.25, but with normal frequency */
3103
3104 if (!fs_2625)
3105 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3106 else if (!statfs (w->path, &sfs)
3107 && (sfs.f_type == 0x1373 /* devfs */
3108 || sfs.f_type == 0xEF53 /* ext2/3 */
3109 || sfs.f_type == 0x3153464a /* jfs */
3110 || sfs.f_type == 0x52654973 /* reiser3 */
3111 || sfs.f_type == 0x01021994 /* tempfs */
3112 || sfs.f_type == 0x58465342 /* xfs */))
3113 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3114 else
3115 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3116 }
3117 else
3118 {
3119 /* can't use inotify, continue to stat */
3120 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3121
3122 /* if path is not there, monitor some parent directory for speedup hints */
3123 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3124 /* but an efficiency issue only */
3125 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
530 { 3126 {
531 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 3127 char path [4096];
3128 strcpy (path, w->path);
532 3129
533 if (fabs (diff) >= 1e-4) 3130 do
534 { 3131 {
535 evperiodic_stop (w); 3132 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
536 evperiodic_start (w); 3133 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
537 3134
538 i = 0; /* restart loop, inefficient, but time jumps should be rare */ 3135 char *pend = strrchr (path, '/');
3136
3137 if (!pend || pend == path)
3138 break;
3139
3140 *pend = 0;
3141 w->wd = inotify_add_watch (fs_fd, path, mask);
3142 }
3143 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3144 }
3145 }
3146
3147 if (w->wd >= 0)
3148 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3149
3150 /* now re-arm timer, if required */
3151 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3152 ev_timer_again (EV_A_ &w->timer);
3153 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3154}
3155
3156static void noinline
3157infy_del (EV_P_ ev_stat *w)
3158{
3159 int slot;
3160 int wd = w->wd;
3161
3162 if (wd < 0)
3163 return;
3164
3165 w->wd = -2;
3166 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3167 wlist_del (&fs_hash [slot].head, (WL)w);
3168
3169 /* remove this watcher, if others are watching it, they will rearm */
3170 inotify_rm_watch (fs_fd, wd);
3171}
3172
3173static void noinline
3174infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3175{
3176 if (slot < 0)
3177 /* overflow, need to check for all hash slots */
3178 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3179 infy_wd (EV_A_ slot, wd, ev);
3180 else
3181 {
3182 WL w_;
3183
3184 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3185 {
3186 ev_stat *w = (ev_stat *)w_;
3187 w_ = w_->next; /* lets us remove this watcher and all before it */
3188
3189 if (w->wd == wd || wd == -1)
3190 {
3191 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3192 {
3193 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3194 w->wd = -1;
3195 infy_add (EV_A_ w); /* re-add, no matter what */
3196 }
3197
3198 stat_timer_cb (EV_A_ &w->timer, 0);
539 } 3199 }
540 } 3200 }
541 } 3201 }
542} 3202}
543 3203
544static void 3204static void
545time_update () 3205infy_cb (EV_P_ ev_io *w, int revents)
546{ 3206{
3207 char buf [EV_INOTIFY_BUFSIZE];
547 int i; 3208 int ofs;
3209 int len = read (fs_fd, buf, sizeof (buf));
548 3210
549 ev_now = ev_time (); 3211 for (ofs = 0; ofs < len; )
550 3212 {
551 if (have_monotonic) 3213 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3214 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3215 ofs += sizeof (struct inotify_event) + ev->len;
552 { 3216 }
553 ev_tstamp odiff = diff; 3217}
554 3218
555 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 3219inline_size void
3220ev_check_2625 (EV_P)
3221{
3222 /* kernels < 2.6.25 are borked
3223 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3224 */
3225 if (ev_linux_version () < 0x020619)
3226 return;
3227
3228 fs_2625 = 1;
3229}
3230
3231inline_size int
3232infy_newfd (void)
3233{
3234#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3235 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3236 if (fd >= 0)
3237 return fd;
3238#endif
3239 return inotify_init ();
3240}
3241
3242inline_size void
3243infy_init (EV_P)
3244{
3245 if (fs_fd != -2)
3246 return;
3247
3248 fs_fd = -1;
3249
3250 ev_check_2625 (EV_A);
3251
3252 fs_fd = infy_newfd ();
3253
3254 if (fs_fd >= 0)
3255 {
3256 fd_intern (fs_fd);
3257 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3258 ev_set_priority (&fs_w, EV_MAXPRI);
3259 ev_io_start (EV_A_ &fs_w);
3260 ev_unref (EV_A);
3261 }
3262}
3263
3264inline_size void
3265infy_fork (EV_P)
3266{
3267 int slot;
3268
3269 if (fs_fd < 0)
3270 return;
3271
3272 ev_ref (EV_A);
3273 ev_io_stop (EV_A_ &fs_w);
3274 close (fs_fd);
3275 fs_fd = infy_newfd ();
3276
3277 if (fs_fd >= 0)
3278 {
3279 fd_intern (fs_fd);
3280 ev_io_set (&fs_w, fs_fd, EV_READ);
3281 ev_io_start (EV_A_ &fs_w);
3282 ev_unref (EV_A);
3283 }
3284
3285 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3286 {
3287 WL w_ = fs_hash [slot].head;
3288 fs_hash [slot].head = 0;
3289
3290 while (w_)
556 { 3291 {
557 now = get_clock (); 3292 ev_stat *w = (ev_stat *)w_;
558 diff = ev_now - now; 3293 w_ = w_->next; /* lets us add this watcher */
559 3294
560 if (fabs (odiff - diff) < MIN_TIMEJUMP) 3295 w->wd = -1;
561 return; /* all is well */
562 3296
563 ev_now = ev_time (); 3297 if (fs_fd >= 0)
3298 infy_add (EV_A_ w); /* re-add, no matter what */
3299 else
3300 {
3301 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3302 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3303 ev_timer_again (EV_A_ &w->timer);
3304 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3305 }
564 } 3306 }
565
566 periodics_reschedule (diff - odiff);
567 /* no timer adjustment, as the monotonic clock doesn't jump */
568 } 3307 }
3308}
3309
3310#endif
3311
3312#ifdef _WIN32
3313# define EV_LSTAT(p,b) _stati64 (p, b)
3314#else
3315# define EV_LSTAT(p,b) lstat (p, b)
3316#endif
3317
3318void
3319ev_stat_stat (EV_P_ ev_stat *w)
3320{
3321 if (lstat (w->path, &w->attr) < 0)
3322 w->attr.st_nlink = 0;
3323 else if (!w->attr.st_nlink)
3324 w->attr.st_nlink = 1;
3325}
3326
3327static void noinline
3328stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3329{
3330 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3331
3332 ev_statdata prev = w->attr;
3333 ev_stat_stat (EV_A_ w);
3334
3335 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3336 if (
3337 prev.st_dev != w->attr.st_dev
3338 || prev.st_ino != w->attr.st_ino
3339 || prev.st_mode != w->attr.st_mode
3340 || prev.st_nlink != w->attr.st_nlink
3341 || prev.st_uid != w->attr.st_uid
3342 || prev.st_gid != w->attr.st_gid
3343 || prev.st_rdev != w->attr.st_rdev
3344 || prev.st_size != w->attr.st_size
3345 || prev.st_atime != w->attr.st_atime
3346 || prev.st_mtime != w->attr.st_mtime
3347 || prev.st_ctime != w->attr.st_ctime
3348 ) {
3349 /* we only update w->prev on actual differences */
3350 /* in case we test more often than invoke the callback, */
3351 /* to ensure that prev is always different to attr */
3352 w->prev = prev;
3353
3354 #if EV_USE_INOTIFY
3355 if (fs_fd >= 0)
3356 {
3357 infy_del (EV_A_ w);
3358 infy_add (EV_A_ w);
3359 ev_stat_stat (EV_A_ w); /* avoid race... */
3360 }
3361 #endif
3362
3363 ev_feed_event (EV_A_ w, EV_STAT);
3364 }
3365}
3366
3367void
3368ev_stat_start (EV_P_ ev_stat *w)
3369{
3370 if (expect_false (ev_is_active (w)))
3371 return;
3372
3373 ev_stat_stat (EV_A_ w);
3374
3375 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3376 w->interval = MIN_STAT_INTERVAL;
3377
3378 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3379 ev_set_priority (&w->timer, ev_priority (w));
3380
3381#if EV_USE_INOTIFY
3382 infy_init (EV_A);
3383
3384 if (fs_fd >= 0)
3385 infy_add (EV_A_ w);
569 else 3386 else
3387#endif
3388 {
3389 ev_timer_again (EV_A_ &w->timer);
3390 ev_unref (EV_A);
570 { 3391 }
571 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 3392
3393 ev_start (EV_A_ (W)w, 1);
3394
3395 EV_FREQUENT_CHECK;
3396}
3397
3398void
3399ev_stat_stop (EV_P_ ev_stat *w)
3400{
3401 clear_pending (EV_A_ (W)w);
3402 if (expect_false (!ev_is_active (w)))
3403 return;
3404
3405 EV_FREQUENT_CHECK;
3406
3407#if EV_USE_INOTIFY
3408 infy_del (EV_A_ w);
3409#endif
3410
3411 if (ev_is_active (&w->timer))
3412 {
3413 ev_ref (EV_A);
3414 ev_timer_stop (EV_A_ &w->timer);
3415 }
3416
3417 ev_stop (EV_A_ (W)w);
3418
3419 EV_FREQUENT_CHECK;
3420}
3421#endif
3422
3423#if EV_IDLE_ENABLE
3424void
3425ev_idle_start (EV_P_ ev_idle *w)
3426{
3427 if (expect_false (ev_is_active (w)))
3428 return;
3429
3430 pri_adjust (EV_A_ (W)w);
3431
3432 EV_FREQUENT_CHECK;
3433
3434 {
3435 int active = ++idlecnt [ABSPRI (w)];
3436
3437 ++idleall;
3438 ev_start (EV_A_ (W)w, active);
3439
3440 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3441 idles [ABSPRI (w)][active - 1] = w;
3442 }
3443
3444 EV_FREQUENT_CHECK;
3445}
3446
3447void
3448ev_idle_stop (EV_P_ ev_idle *w)
3449{
3450 clear_pending (EV_A_ (W)w);
3451 if (expect_false (!ev_is_active (w)))
3452 return;
3453
3454 EV_FREQUENT_CHECK;
3455
3456 {
3457 int active = ev_active (w);
3458
3459 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3460 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3461
3462 ev_stop (EV_A_ (W)w);
3463 --idleall;
3464 }
3465
3466 EV_FREQUENT_CHECK;
3467}
3468#endif
3469
3470#if EV_PREPARE_ENABLE
3471void
3472ev_prepare_start (EV_P_ ev_prepare *w)
3473{
3474 if (expect_false (ev_is_active (w)))
3475 return;
3476
3477 EV_FREQUENT_CHECK;
3478
3479 ev_start (EV_A_ (W)w, ++preparecnt);
3480 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3481 prepares [preparecnt - 1] = w;
3482
3483 EV_FREQUENT_CHECK;
3484}
3485
3486void
3487ev_prepare_stop (EV_P_ ev_prepare *w)
3488{
3489 clear_pending (EV_A_ (W)w);
3490 if (expect_false (!ev_is_active (w)))
3491 return;
3492
3493 EV_FREQUENT_CHECK;
3494
3495 {
3496 int active = ev_active (w);
3497
3498 prepares [active - 1] = prepares [--preparecnt];
3499 ev_active (prepares [active - 1]) = active;
3500 }
3501
3502 ev_stop (EV_A_ (W)w);
3503
3504 EV_FREQUENT_CHECK;
3505}
3506#endif
3507
3508#if EV_CHECK_ENABLE
3509void
3510ev_check_start (EV_P_ ev_check *w)
3511{
3512 if (expect_false (ev_is_active (w)))
3513 return;
3514
3515 EV_FREQUENT_CHECK;
3516
3517 ev_start (EV_A_ (W)w, ++checkcnt);
3518 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3519 checks [checkcnt - 1] = w;
3520
3521 EV_FREQUENT_CHECK;
3522}
3523
3524void
3525ev_check_stop (EV_P_ ev_check *w)
3526{
3527 clear_pending (EV_A_ (W)w);
3528 if (expect_false (!ev_is_active (w)))
3529 return;
3530
3531 EV_FREQUENT_CHECK;
3532
3533 {
3534 int active = ev_active (w);
3535
3536 checks [active - 1] = checks [--checkcnt];
3537 ev_active (checks [active - 1]) = active;
3538 }
3539
3540 ev_stop (EV_A_ (W)w);
3541
3542 EV_FREQUENT_CHECK;
3543}
3544#endif
3545
3546#if EV_EMBED_ENABLE
3547void noinline
3548ev_embed_sweep (EV_P_ ev_embed *w)
3549{
3550 ev_run (w->other, EVRUN_NOWAIT);
3551}
3552
3553static void
3554embed_io_cb (EV_P_ ev_io *io, int revents)
3555{
3556 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3557
3558 if (ev_cb (w))
3559 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3560 else
3561 ev_run (w->other, EVRUN_NOWAIT);
3562}
3563
3564static void
3565embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3566{
3567 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3568
3569 {
3570 EV_P = w->other;
3571
3572 while (fdchangecnt)
572 { 3573 {
573 periodics_reschedule (ev_now - now); 3574 fd_reify (EV_A);
574 3575 ev_run (EV_A_ EVRUN_NOWAIT);
575 /* adjust timers. this is easy, as the offset is the same for all */
576 for (i = 0; i < timercnt; ++i)
577 timers [i]->at += diff;
578 } 3576 }
579
580 now = ev_now;
581 } 3577 }
582} 3578}
583 3579
584int ev_loop_done; 3580static void
585 3581embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
586void ev_loop (int flags)
587{ 3582{
588 double block; 3583 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
589 ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
590 3584
591 do 3585 ev_embed_stop (EV_A_ w);
3586
592 { 3587 {
593 /* queue check watchers (and execute them) */ 3588 EV_P = w->other;
594 if (preparecnt)
595 {
596 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
597 call_pending ();
598 }
599 3589
600 /* update fd-related kernel structures */ 3590 ev_loop_fork (EV_A);
601 fd_reify (); 3591 ev_run (EV_A_ EVRUN_NOWAIT);
602
603 /* calculate blocking time */
604
605 /* we only need this for !monotonic clockor timers, but as we basically
606 always have timers, we just calculate it always */
607 ev_now = ev_time ();
608
609 if (flags & EVLOOP_NONBLOCK || idlecnt)
610 block = 0.;
611 else
612 {
613 block = MAX_BLOCKTIME;
614
615 if (timercnt)
616 {
617 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
618 if (block > to) block = to;
619 }
620
621 if (periodiccnt)
622 {
623 ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
624 if (block > to) block = to;
625 }
626
627 if (block < 0.) block = 0.;
628 }
629
630 method_poll (block);
631
632 /* update ev_now, do magic */
633 time_update ();
634
635 /* queue pending timers and reschedule them */
636 timers_reify (); /* relative timers called last */
637 periodics_reify (); /* absolute timers called first */
638
639 /* queue idle watchers unless io or timers are pending */
640 if (!pendingcnt)
641 queue_events ((W *)idles, idlecnt, EV_IDLE);
642
643 /* queue check watchers, to be executed first */
644 if (checkcnt)
645 queue_events ((W *)checks, checkcnt, EV_CHECK);
646
647 call_pending ();
648 } 3592 }
649 while (!ev_loop_done);
650 3593
651 if (ev_loop_done != 2) 3594 ev_embed_start (EV_A_ w);
652 ev_loop_done = 0;
653} 3595}
3596
3597#if 0
3598static void
3599embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3600{
3601 ev_idle_stop (EV_A_ idle);
3602}
3603#endif
3604
3605void
3606ev_embed_start (EV_P_ ev_embed *w)
3607{
3608 if (expect_false (ev_is_active (w)))
3609 return;
3610
3611 {
3612 EV_P = w->other;
3613 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3614 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3615 }
3616
3617 EV_FREQUENT_CHECK;
3618
3619 ev_set_priority (&w->io, ev_priority (w));
3620 ev_io_start (EV_A_ &w->io);
3621
3622 ev_prepare_init (&w->prepare, embed_prepare_cb);
3623 ev_set_priority (&w->prepare, EV_MINPRI);
3624 ev_prepare_start (EV_A_ &w->prepare);
3625
3626 ev_fork_init (&w->fork, embed_fork_cb);
3627 ev_fork_start (EV_A_ &w->fork);
3628
3629 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3630
3631 ev_start (EV_A_ (W)w, 1);
3632
3633 EV_FREQUENT_CHECK;
3634}
3635
3636void
3637ev_embed_stop (EV_P_ ev_embed *w)
3638{
3639 clear_pending (EV_A_ (W)w);
3640 if (expect_false (!ev_is_active (w)))
3641 return;
3642
3643 EV_FREQUENT_CHECK;
3644
3645 ev_io_stop (EV_A_ &w->io);
3646 ev_prepare_stop (EV_A_ &w->prepare);
3647 ev_fork_stop (EV_A_ &w->fork);
3648
3649 ev_stop (EV_A_ (W)w);
3650
3651 EV_FREQUENT_CHECK;
3652}
3653#endif
3654
3655#if EV_FORK_ENABLE
3656void
3657ev_fork_start (EV_P_ ev_fork *w)
3658{
3659 if (expect_false (ev_is_active (w)))
3660 return;
3661
3662 EV_FREQUENT_CHECK;
3663
3664 ev_start (EV_A_ (W)w, ++forkcnt);
3665 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3666 forks [forkcnt - 1] = w;
3667
3668 EV_FREQUENT_CHECK;
3669}
3670
3671void
3672ev_fork_stop (EV_P_ ev_fork *w)
3673{
3674 clear_pending (EV_A_ (W)w);
3675 if (expect_false (!ev_is_active (w)))
3676 return;
3677
3678 EV_FREQUENT_CHECK;
3679
3680 {
3681 int active = ev_active (w);
3682
3683 forks [active - 1] = forks [--forkcnt];
3684 ev_active (forks [active - 1]) = active;
3685 }
3686
3687 ev_stop (EV_A_ (W)w);
3688
3689 EV_FREQUENT_CHECK;
3690}
3691#endif
3692
3693#if EV_CLEANUP_ENABLE
3694void
3695ev_cleanup_start (EV_P_ ev_cleanup *w)
3696{
3697 if (expect_false (ev_is_active (w)))
3698 return;
3699
3700 EV_FREQUENT_CHECK;
3701
3702 ev_start (EV_A_ (W)w, ++cleanupcnt);
3703 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3704 cleanups [cleanupcnt - 1] = w;
3705
3706 /* cleanup watchers should never keep a refcount on the loop */
3707 ev_unref (EV_A);
3708 EV_FREQUENT_CHECK;
3709}
3710
3711void
3712ev_cleanup_stop (EV_P_ ev_cleanup *w)
3713{
3714 clear_pending (EV_A_ (W)w);
3715 if (expect_false (!ev_is_active (w)))
3716 return;
3717
3718 EV_FREQUENT_CHECK;
3719 ev_ref (EV_A);
3720
3721 {
3722 int active = ev_active (w);
3723
3724 cleanups [active - 1] = cleanups [--cleanupcnt];
3725 ev_active (cleanups [active - 1]) = active;
3726 }
3727
3728 ev_stop (EV_A_ (W)w);
3729
3730 EV_FREQUENT_CHECK;
3731}
3732#endif
3733
3734#if EV_ASYNC_ENABLE
3735void
3736ev_async_start (EV_P_ ev_async *w)
3737{
3738 if (expect_false (ev_is_active (w)))
3739 return;
3740
3741 w->sent = 0;
3742
3743 evpipe_init (EV_A);
3744
3745 EV_FREQUENT_CHECK;
3746
3747 ev_start (EV_A_ (W)w, ++asynccnt);
3748 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3749 asyncs [asynccnt - 1] = w;
3750
3751 EV_FREQUENT_CHECK;
3752}
3753
3754void
3755ev_async_stop (EV_P_ ev_async *w)
3756{
3757 clear_pending (EV_A_ (W)w);
3758 if (expect_false (!ev_is_active (w)))
3759 return;
3760
3761 EV_FREQUENT_CHECK;
3762
3763 {
3764 int active = ev_active (w);
3765
3766 asyncs [active - 1] = asyncs [--asynccnt];
3767 ev_active (asyncs [active - 1]) = active;
3768 }
3769
3770 ev_stop (EV_A_ (W)w);
3771
3772 EV_FREQUENT_CHECK;
3773}
3774
3775void
3776ev_async_send (EV_P_ ev_async *w)
3777{
3778 w->sent = 1;
3779 evpipe_write (EV_A_ &async_pending);
3780}
3781#endif
654 3782
655/*****************************************************************************/ 3783/*****************************************************************************/
656 3784
657static void
658wlist_add (WL *head, WL elem)
659{
660 elem->next = *head;
661 *head = elem;
662}
663
664static void
665wlist_del (WL *head, WL elem)
666{
667 while (*head)
668 {
669 if (*head == elem)
670 {
671 *head = elem->next;
672 return;
673 }
674
675 head = &(*head)->next;
676 }
677}
678
679static void
680ev_clear (W w)
681{
682 if (w->pending)
683 {
684 pendings [w->pending - 1].w = 0;
685 w->pending = 0;
686 }
687}
688
689static void
690ev_start (W w, int active)
691{
692 w->active = active;
693}
694
695static void
696ev_stop (W w)
697{
698 w->active = 0;
699}
700
701/*****************************************************************************/
702
703void
704evio_start (struct ev_io *w)
705{
706 if (ev_is_active (w))
707 return;
708
709 int fd = w->fd;
710
711 ev_start ((W)w, 1);
712 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
713 wlist_add ((WL *)&anfds[fd].head, (WL)w);
714
715 ++fdchangecnt;
716 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
717 fdchanges [fdchangecnt - 1] = fd;
718}
719
720void
721evio_stop (struct ev_io *w)
722{
723 ev_clear ((W)w);
724 if (!ev_is_active (w))
725 return;
726
727 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
728 ev_stop ((W)w);
729
730 ++fdchangecnt;
731 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
732 fdchanges [fdchangecnt - 1] = w->fd;
733}
734
735void
736evtimer_start (struct ev_timer *w)
737{
738 if (ev_is_active (w))
739 return;
740
741 w->at += now;
742
743 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));
744
745 ev_start ((W)w, ++timercnt);
746 array_needsize (timers, timermax, timercnt, );
747 timers [timercnt - 1] = w;
748 upheap ((WT *)timers, timercnt - 1);
749}
750
751void
752evtimer_stop (struct ev_timer *w)
753{
754 ev_clear ((W)w);
755 if (!ev_is_active (w))
756 return;
757
758 if (w->active < timercnt--)
759 {
760 timers [w->active - 1] = timers [timercnt];
761 downheap ((WT *)timers, timercnt, w->active - 1);
762 }
763
764 w->at = w->repeat;
765
766 ev_stop ((W)w);
767}
768
769void
770evtimer_again (struct ev_timer *w)
771{
772 if (ev_is_active (w))
773 {
774 if (w->repeat)
775 {
776 w->at = now + w->repeat;
777 downheap ((WT *)timers, timercnt, w->active - 1);
778 }
779 else
780 evtimer_stop (w);
781 }
782 else if (w->repeat)
783 evtimer_start (w);
784}
785
786void
787evperiodic_start (struct ev_periodic *w)
788{
789 if (ev_is_active (w))
790 return;
791
792 assert (("periodic interval value less than zero not allowed", w->interval >= 0.));
793
794 /* this formula differs from the one in periodic_reify because we do not always round up */
795 if (w->interval)
796 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
797
798 ev_start ((W)w, ++periodiccnt);
799 array_needsize (periodics, periodicmax, periodiccnt, );
800 periodics [periodiccnt - 1] = w;
801 upheap ((WT *)periodics, periodiccnt - 1);
802}
803
804void
805evperiodic_stop (struct ev_periodic *w)
806{
807 ev_clear ((W)w);
808 if (!ev_is_active (w))
809 return;
810
811 if (w->active < periodiccnt--)
812 {
813 periodics [w->active - 1] = periodics [periodiccnt];
814 downheap ((WT *)periodics, periodiccnt, w->active - 1);
815 }
816
817 ev_stop ((W)w);
818}
819
820void
821evsignal_start (struct ev_signal *w)
822{
823 if (ev_is_active (w))
824 return;
825
826 ev_start ((W)w, 1);
827 array_needsize (signals, signalmax, w->signum, signals_init);
828 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
829
830 if (!w->next)
831 {
832 struct sigaction sa;
833 sa.sa_handler = sighandler;
834 sigfillset (&sa.sa_mask);
835 sa.sa_flags = 0;
836 sigaction (w->signum, &sa, 0);
837 }
838}
839
840void
841evsignal_stop (struct ev_signal *w)
842{
843 ev_clear ((W)w);
844 if (!ev_is_active (w))
845 return;
846
847 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
848 ev_stop ((W)w);
849
850 if (!signals [w->signum - 1].head)
851 signal (w->signum, SIG_DFL);
852}
853
854void evidle_start (struct ev_idle *w)
855{
856 if (ev_is_active (w))
857 return;
858
859 ev_start ((W)w, ++idlecnt);
860 array_needsize (idles, idlemax, idlecnt, );
861 idles [idlecnt - 1] = w;
862}
863
864void evidle_stop (struct ev_idle *w)
865{
866 ev_clear ((W)w);
867 if (ev_is_active (w))
868 return;
869
870 idles [w->active - 1] = idles [--idlecnt];
871 ev_stop ((W)w);
872}
873
874void evprepare_start (struct ev_prepare *w)
875{
876 if (ev_is_active (w))
877 return;
878
879 ev_start ((W)w, ++preparecnt);
880 array_needsize (prepares, preparemax, preparecnt, );
881 prepares [preparecnt - 1] = w;
882}
883
884void evprepare_stop (struct ev_prepare *w)
885{
886 ev_clear ((W)w);
887 if (ev_is_active (w))
888 return;
889
890 prepares [w->active - 1] = prepares [--preparecnt];
891 ev_stop ((W)w);
892}
893
894void evcheck_start (struct ev_check *w)
895{
896 if (ev_is_active (w))
897 return;
898
899 ev_start ((W)w, ++checkcnt);
900 array_needsize (checks, checkmax, checkcnt, );
901 checks [checkcnt - 1] = w;
902}
903
904void evcheck_stop (struct ev_check *w)
905{
906 ev_clear ((W)w);
907 if (ev_is_active (w))
908 return;
909
910 checks [w->active - 1] = checks [--checkcnt];
911 ev_stop ((W)w);
912}
913
914void evchild_start (struct ev_child *w)
915{
916 if (ev_is_active (w))
917 return;
918
919 ev_start ((W)w, 1);
920 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
921}
922
923void evchild_stop (struct ev_child *w)
924{
925 ev_clear ((W)w);
926 if (ev_is_active (w))
927 return;
928
929 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
930 ev_stop ((W)w);
931}
932
933/*****************************************************************************/
934
935struct ev_once 3785struct ev_once
936{ 3786{
937 struct ev_io io; 3787 ev_io io;
938 struct ev_timer to; 3788 ev_timer to;
939 void (*cb)(int revents, void *arg); 3789 void (*cb)(int revents, void *arg);
940 void *arg; 3790 void *arg;
941}; 3791};
942 3792
943static void 3793static void
944once_cb (struct ev_once *once, int revents) 3794once_cb (EV_P_ struct ev_once *once, int revents)
945{ 3795{
946 void (*cb)(int revents, void *arg) = once->cb; 3796 void (*cb)(int revents, void *arg) = once->cb;
947 void *arg = once->arg; 3797 void *arg = once->arg;
948 3798
949 evio_stop (&once->io); 3799 ev_io_stop (EV_A_ &once->io);
950 evtimer_stop (&once->to); 3800 ev_timer_stop (EV_A_ &once->to);
951 free (once); 3801 ev_free (once);
952 3802
953 cb (revents, arg); 3803 cb (revents, arg);
954} 3804}
955 3805
956static void 3806static void
957once_cb_io (struct ev_io *w, int revents) 3807once_cb_io (EV_P_ ev_io *w, int revents)
958{ 3808{
959 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3809 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3810
3811 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
960} 3812}
961 3813
962static void 3814static void
963once_cb_to (struct ev_timer *w, int revents) 3815once_cb_to (EV_P_ ev_timer *w, int revents)
964{ 3816{
965 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3817 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
966}
967 3818
3819 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3820}
3821
968void 3822void
969ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3823ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
970{ 3824{
971 struct ev_once *once = malloc (sizeof (struct ev_once)); 3825 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
972 3826
973 if (!once) 3827 if (expect_false (!once))
974 cb (EV_ERROR, arg); 3828 {
975 else 3829 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3830 return;
976 { 3831 }
3832
977 once->cb = cb; 3833 once->cb = cb;
978 once->arg = arg; 3834 once->arg = arg;
979 3835
980 evw_init (&once->io, once_cb_io); 3836 ev_init (&once->io, once_cb_io);
981
982 if (fd >= 0) 3837 if (fd >= 0)
3838 {
3839 ev_io_set (&once->io, fd, events);
3840 ev_io_start (EV_A_ &once->io);
3841 }
3842
3843 ev_init (&once->to, once_cb_to);
3844 if (timeout >= 0.)
3845 {
3846 ev_timer_set (&once->to, timeout, 0.);
3847 ev_timer_start (EV_A_ &once->to);
3848 }
3849}
3850
3851/*****************************************************************************/
3852
3853#if EV_WALK_ENABLE
3854void
3855ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3856{
3857 int i, j;
3858 ev_watcher_list *wl, *wn;
3859
3860 if (types & (EV_IO | EV_EMBED))
3861 for (i = 0; i < anfdmax; ++i)
3862 for (wl = anfds [i].head; wl; )
983 { 3863 {
984 evio_set (&once->io, fd, events); 3864 wn = wl->next;
985 evio_start (&once->io); 3865
3866#if EV_EMBED_ENABLE
3867 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3868 {
3869 if (types & EV_EMBED)
3870 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3871 }
3872 else
3873#endif
3874#if EV_USE_INOTIFY
3875 if (ev_cb ((ev_io *)wl) == infy_cb)
3876 ;
3877 else
3878#endif
3879 if ((ev_io *)wl != &pipe_w)
3880 if (types & EV_IO)
3881 cb (EV_A_ EV_IO, wl);
3882
3883 wl = wn;
986 } 3884 }
987 3885
988 evw_init (&once->to, once_cb_to); 3886 if (types & (EV_TIMER | EV_STAT))
989 3887 for (i = timercnt + HEAP0; i-- > HEAP0; )
990 if (timeout >= 0.) 3888#if EV_STAT_ENABLE
3889 /*TODO: timer is not always active*/
3890 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
991 { 3891 {
992 evtimer_set (&once->to, timeout, 0.); 3892 if (types & EV_STAT)
993 evtimer_start (&once->to); 3893 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
994 } 3894 }
995 } 3895 else
996} 3896#endif
3897 if (types & EV_TIMER)
3898 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
997 3899
998/*****************************************************************************/ 3900#if EV_PERIODIC_ENABLE
3901 if (types & EV_PERIODIC)
3902 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3903 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3904#endif
999 3905
1000#if 0 3906#if EV_IDLE_ENABLE
3907 if (types & EV_IDLE)
3908 for (j = NUMPRI; i--; )
3909 for (i = idlecnt [j]; i--; )
3910 cb (EV_A_ EV_IDLE, idles [j][i]);
3911#endif
1001 3912
1002struct ev_io wio; 3913#if EV_FORK_ENABLE
3914 if (types & EV_FORK)
3915 for (i = forkcnt; i--; )
3916 if (ev_cb (forks [i]) != embed_fork_cb)
3917 cb (EV_A_ EV_FORK, forks [i]);
3918#endif
1003 3919
1004static void 3920#if EV_ASYNC_ENABLE
1005sin_cb (struct ev_io *w, int revents) 3921 if (types & EV_ASYNC)
1006{ 3922 for (i = asynccnt; i--; )
1007 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 3923 cb (EV_A_ EV_ASYNC, asyncs [i]);
1008} 3924#endif
1009 3925
1010static void 3926#if EV_PREPARE_ENABLE
1011ocb (struct ev_timer *w, int revents) 3927 if (types & EV_PREPARE)
1012{ 3928 for (i = preparecnt; i--; )
1013 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 3929# if EV_EMBED_ENABLE
1014 evtimer_stop (w); 3930 if (ev_cb (prepares [i]) != embed_prepare_cb)
1015 evtimer_start (w);
1016}
1017
1018static void
1019scb (struct ev_signal *w, int revents)
1020{
1021 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1022 evio_stop (&wio);
1023 evio_start (&wio);
1024}
1025
1026static void
1027gcb (struct ev_signal *w, int revents)
1028{
1029 fprintf (stderr, "generic %x\n", revents);
1030
1031}
1032
1033int main (void)
1034{
1035 ev_init (0);
1036
1037 evio_init (&wio, sin_cb, 0, EV_READ);
1038 evio_start (&wio);
1039
1040 struct ev_timer t[10000];
1041
1042#if 0
1043 int i;
1044 for (i = 0; i < 10000; ++i)
1045 {
1046 struct ev_timer *w = t + i;
1047 evw_init (w, ocb, i);
1048 evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1049 evtimer_start (w);
1050 if (drand48 () < 0.5)
1051 evtimer_stop (w);
1052 }
1053#endif 3931# endif
1054 3932 cb (EV_A_ EV_PREPARE, prepares [i]);
1055 struct ev_timer t1;
1056 evtimer_init (&t1, ocb, 5, 10);
1057 evtimer_start (&t1);
1058
1059 struct ev_signal sig;
1060 evsignal_init (&sig, scb, SIGQUIT);
1061 evsignal_start (&sig);
1062
1063 struct ev_check cw;
1064 evcheck_init (&cw, gcb);
1065 evcheck_start (&cw);
1066
1067 struct ev_idle iw;
1068 evidle_init (&iw, gcb);
1069 evidle_start (&iw);
1070
1071 ev_loop (0);
1072
1073 return 0;
1074}
1075
1076#endif 3933#endif
1077 3934
3935#if EV_CHECK_ENABLE
3936 if (types & EV_CHECK)
3937 for (i = checkcnt; i--; )
3938 cb (EV_A_ EV_CHECK, checks [i]);
3939#endif
1078 3940
3941#if EV_SIGNAL_ENABLE
3942 if (types & EV_SIGNAL)
3943 for (i = 0; i < EV_NSIG - 1; ++i)
3944 for (wl = signals [i].head; wl; )
3945 {
3946 wn = wl->next;
3947 cb (EV_A_ EV_SIGNAL, wl);
3948 wl = wn;
3949 }
3950#endif
1079 3951
3952#if EV_CHILD_ENABLE
3953 if (types & EV_CHILD)
3954 for (i = (EV_PID_HASHSIZE); i--; )
3955 for (wl = childs [i]; wl; )
3956 {
3957 wn = wl->next;
3958 cb (EV_A_ EV_CHILD, wl);
3959 wl = wn;
3960 }
3961#endif
3962/* EV_STAT 0x00001000 /* stat data changed */
3963/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
3964}
3965#endif
1080 3966
3967#if EV_MULTIPLICITY
3968 #include "ev_wrap.h"
3969#endif
3970
3971EV_CPP(})
3972

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