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Comparing libev/ev.c (file contents):
Revision 1.43 by root, Fri Nov 2 20:21:33 2007 UTC vs.
Revision 1.332 by root, Tue Mar 9 08:58:17 2010 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met: 9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
10 * 27 *
11 * * Redistributions of source code must retain the above copyright 28 * Alternatively, the contents of this file may be used under the terms of
12 * notice, this list of conditions and the following disclaimer. 29 * the GNU General Public License ("GPL") version 2 or any later version,
13 * 30 * in which case the provisions of the GPL are applicable instead of
14 * * Redistributions in binary form must reproduce the above 31 * the above. If you wish to allow the use of your version of this file
15 * copyright notice, this list of conditions and the following 32 * only under the terms of the GPL and not to allow others to use your
16 * disclaimer in the documentation and/or other materials provided 33 * version of this file under the BSD license, indicate your decision
17 * with the distribution. 34 * by deleting the provisions above and replace them with the notice
18 * 35 * and other provisions required by the GPL. If you do not delete the
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 36 * provisions above, a recipient may use your version of this file under
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 37 * either the BSD or the GPL.
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */ 38 */
39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE
31#if EV_USE_CONFIG_H 46# ifdef EV_CONFIG_H
47# include EV_CONFIG_H
48# else
32# include "config.h" 49# include "config.h"
50# endif
51
52# if HAVE_CLOCK_SYSCALL
53# ifndef EV_USE_CLOCK_SYSCALL
54# define EV_USE_CLOCK_SYSCALL 1
55# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 0
57# endif
58# ifndef EV_USE_MONOTONIC
59# define EV_USE_MONOTONIC 1
60# endif
61# endif
62# elif !defined(EV_USE_CLOCK_SYSCALL)
63# define EV_USE_CLOCK_SYSCALL 0
64# endif
65
66# if HAVE_CLOCK_GETTIME
67# ifndef EV_USE_MONOTONIC
68# define EV_USE_MONOTONIC 1
69# endif
70# ifndef EV_USE_REALTIME
71# define EV_USE_REALTIME 0
72# endif
73# else
74# ifndef EV_USE_MONOTONIC
75# define EV_USE_MONOTONIC 0
76# endif
77# ifndef EV_USE_REALTIME
78# define EV_USE_REALTIME 0
79# endif
80# endif
81
82# ifndef EV_USE_NANOSLEEP
83# if HAVE_NANOSLEEP
84# define EV_USE_NANOSLEEP 1
85# else
86# define EV_USE_NANOSLEEP 0
87# endif
88# endif
89
90# ifndef EV_USE_SELECT
91# if HAVE_SELECT && HAVE_SYS_SELECT_H
92# define EV_USE_SELECT 1
93# else
94# define EV_USE_SELECT 0
95# endif
96# endif
97
98# ifndef EV_USE_POLL
99# if HAVE_POLL && HAVE_POLL_H
100# define EV_USE_POLL 1
101# else
102# define EV_USE_POLL 0
103# endif
104# endif
105
106# ifndef EV_USE_EPOLL
107# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
108# define EV_USE_EPOLL 1
109# else
110# define EV_USE_EPOLL 0
111# endif
112# endif
113
114# ifndef EV_USE_KQUEUE
115# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
116# define EV_USE_KQUEUE 1
117# else
118# define EV_USE_KQUEUE 0
119# endif
120# endif
121
122# ifndef EV_USE_PORT
123# if HAVE_PORT_H && HAVE_PORT_CREATE
124# define EV_USE_PORT 1
125# else
126# define EV_USE_PORT 0
127# endif
128# endif
129
130# ifndef EV_USE_INOTIFY
131# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
132# define EV_USE_INOTIFY 1
133# else
134# define EV_USE_INOTIFY 0
135# endif
136# endif
137
138# ifndef EV_USE_SIGNALFD
139# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
140# define EV_USE_SIGNALFD 1
141# else
142# define EV_USE_SIGNALFD 0
143# endif
144# endif
145
146# ifndef EV_USE_EVENTFD
147# if HAVE_EVENTFD
148# define EV_USE_EVENTFD 1
149# else
150# define EV_USE_EVENTFD 0
151# endif
152# endif
153
33#endif 154#endif
34 155
35#include <math.h> 156#include <math.h>
36#include <stdlib.h> 157#include <stdlib.h>
37#include <unistd.h> 158#include <string.h>
38#include <fcntl.h> 159#include <fcntl.h>
39#include <signal.h>
40#include <stddef.h> 160#include <stddef.h>
41 161
42#include <stdio.h> 162#include <stdio.h>
43 163
44#include <assert.h> 164#include <assert.h>
45#include <errno.h> 165#include <errno.h>
46#include <sys/types.h> 166#include <sys/types.h>
47#include <sys/wait.h>
48#include <sys/time.h>
49#include <time.h> 167#include <time.h>
168#include <limits.h>
50 169
51/**/ 170#include <signal.h>
171
172#ifdef EV_H
173# include EV_H
174#else
175# include "ev.h"
176#endif
177
178#ifndef _WIN32
179# include <sys/time.h>
180# include <sys/wait.h>
181# include <unistd.h>
182#else
183# include <io.h>
184# define WIN32_LEAN_AND_MEAN
185# include <windows.h>
186# ifndef EV_SELECT_IS_WINSOCKET
187# define EV_SELECT_IS_WINSOCKET 1
188# endif
189# undef EV_AVOID_STDIO
190#endif
191
192/* this block tries to deduce configuration from header-defined symbols and defaults */
193
194/* try to deduce the maximum number of signals on this platform */
195#if defined (EV_NSIG)
196/* use what's provided */
197#elif defined (NSIG)
198# define EV_NSIG (NSIG)
199#elif defined(_NSIG)
200# define EV_NSIG (_NSIG)
201#elif defined (SIGMAX)
202# define EV_NSIG (SIGMAX+1)
203#elif defined (SIG_MAX)
204# define EV_NSIG (SIG_MAX+1)
205#elif defined (_SIG_MAX)
206# define EV_NSIG (_SIG_MAX+1)
207#elif defined (MAXSIG)
208# define EV_NSIG (MAXSIG+1)
209#elif defined (MAX_SIG)
210# define EV_NSIG (MAX_SIG+1)
211#elif defined (SIGARRAYSIZE)
212# define EV_NSIG SIGARRAYSIZE /* Assume ary[SIGARRAYSIZE] */
213#elif defined (_sys_nsig)
214# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
215#else
216# error "unable to find value for NSIG, please report"
217/* to make it compile regardless, just remove the above line */
218# define EV_NSIG 65
219#endif
220
221#ifndef EV_USE_CLOCK_SYSCALL
222# if __linux && __GLIBC__ >= 2
223# define EV_USE_CLOCK_SYSCALL 1
224# else
225# define EV_USE_CLOCK_SYSCALL 0
226# endif
227#endif
52 228
53#ifndef EV_USE_MONOTONIC 229#ifndef EV_USE_MONOTONIC
230# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
54# define EV_USE_MONOTONIC 1 231# define EV_USE_MONOTONIC 1
232# else
233# define EV_USE_MONOTONIC 0
234# endif
235#endif
236
237#ifndef EV_USE_REALTIME
238# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
239#endif
240
241#ifndef EV_USE_NANOSLEEP
242# if _POSIX_C_SOURCE >= 199309L
243# define EV_USE_NANOSLEEP 1
244# else
245# define EV_USE_NANOSLEEP 0
246# endif
55#endif 247#endif
56 248
57#ifndef EV_USE_SELECT 249#ifndef EV_USE_SELECT
58# define EV_USE_SELECT 1 250# define EV_USE_SELECT 1
59#endif 251#endif
60 252
61#ifndef EV_USE_POLL 253#ifndef EV_USE_POLL
62# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ 254# ifdef _WIN32
255# define EV_USE_POLL 0
256# else
257# define EV_USE_POLL 1
258# endif
63#endif 259#endif
64 260
65#ifndef EV_USE_EPOLL 261#ifndef EV_USE_EPOLL
262# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
263# define EV_USE_EPOLL 1
264# else
66# define EV_USE_EPOLL 0 265# define EV_USE_EPOLL 0
67#endif 266# endif
267#endif
68 268
269#ifndef EV_USE_KQUEUE
270# define EV_USE_KQUEUE 0
271#endif
272
69#ifndef EV_USE_REALTIME 273#ifndef EV_USE_PORT
274# define EV_USE_PORT 0
275#endif
276
277#ifndef EV_USE_INOTIFY
278# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
70# define EV_USE_REALTIME 1 279# define EV_USE_INOTIFY 1
280# else
281# define EV_USE_INOTIFY 0
71#endif 282# endif
283#endif
72 284
73/**/ 285#ifndef EV_PID_HASHSIZE
286# if EV_MINIMAL
287# define EV_PID_HASHSIZE 1
288# else
289# define EV_PID_HASHSIZE 16
290# endif
291#endif
292
293#ifndef EV_INOTIFY_HASHSIZE
294# if EV_MINIMAL
295# define EV_INOTIFY_HASHSIZE 1
296# else
297# define EV_INOTIFY_HASHSIZE 16
298# endif
299#endif
300
301#ifndef EV_USE_EVENTFD
302# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
303# define EV_USE_EVENTFD 1
304# else
305# define EV_USE_EVENTFD 0
306# endif
307#endif
308
309#ifndef EV_USE_SIGNALFD
310# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
311# define EV_USE_SIGNALFD 1
312# else
313# define EV_USE_SIGNALFD 0
314# endif
315#endif
316
317#if 0 /* debugging */
318# define EV_VERIFY 3
319# define EV_USE_4HEAP 1
320# define EV_HEAP_CACHE_AT 1
321#endif
322
323#ifndef EV_VERIFY
324# define EV_VERIFY !EV_MINIMAL
325#endif
326
327#ifndef EV_USE_4HEAP
328# define EV_USE_4HEAP !EV_MINIMAL
329#endif
330
331#ifndef EV_HEAP_CACHE_AT
332# define EV_HEAP_CACHE_AT !EV_MINIMAL
333#endif
334
335/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
336/* which makes programs even slower. might work on other unices, too. */
337#if EV_USE_CLOCK_SYSCALL
338# include <syscall.h>
339# ifdef SYS_clock_gettime
340# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
341# undef EV_USE_MONOTONIC
342# define EV_USE_MONOTONIC 1
343# else
344# undef EV_USE_CLOCK_SYSCALL
345# define EV_USE_CLOCK_SYSCALL 0
346# endif
347#endif
348
349/* this block fixes any misconfiguration where we know we run into trouble otherwise */
350
351#ifdef _AIX
352/* AIX has a completely broken poll.h header */
353# undef EV_USE_POLL
354# define EV_USE_POLL 0
355#endif
74 356
75#ifndef CLOCK_MONOTONIC 357#ifndef CLOCK_MONOTONIC
76# undef EV_USE_MONOTONIC 358# undef EV_USE_MONOTONIC
77# define EV_USE_MONOTONIC 0 359# define EV_USE_MONOTONIC 0
78#endif 360#endif
… …
80#ifndef CLOCK_REALTIME 362#ifndef CLOCK_REALTIME
81# undef EV_USE_REALTIME 363# undef EV_USE_REALTIME
82# define EV_USE_REALTIME 0 364# define EV_USE_REALTIME 0
83#endif 365#endif
84 366
367#if !EV_STAT_ENABLE
368# undef EV_USE_INOTIFY
369# define EV_USE_INOTIFY 0
370#endif
371
372#if !EV_USE_NANOSLEEP
373# ifndef _WIN32
374# include <sys/select.h>
375# endif
376#endif
377
378#if EV_USE_INOTIFY
379# include <sys/utsname.h>
380# include <sys/statfs.h>
381# include <sys/inotify.h>
382/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
383# ifndef IN_DONT_FOLLOW
384# undef EV_USE_INOTIFY
385# define EV_USE_INOTIFY 0
386# endif
387#endif
388
389#if EV_SELECT_IS_WINSOCKET
390# include <winsock.h>
391#endif
392
393#if EV_USE_EVENTFD
394/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
395# include <stdint.h>
396# ifndef EFD_NONBLOCK
397# define EFD_NONBLOCK O_NONBLOCK
398# endif
399# ifndef EFD_CLOEXEC
400# ifdef O_CLOEXEC
401# define EFD_CLOEXEC O_CLOEXEC
402# else
403# define EFD_CLOEXEC 02000000
404# endif
405# endif
406# ifdef __cplusplus
407extern "C" {
408# endif
409int (eventfd) (unsigned int initval, int flags);
410# ifdef __cplusplus
411}
412# endif
413#endif
414
415#if EV_USE_SIGNALFD
416/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
417# include <stdint.h>
418# ifndef SFD_NONBLOCK
419# define SFD_NONBLOCK O_NONBLOCK
420# endif
421# ifndef SFD_CLOEXEC
422# ifdef O_CLOEXEC
423# define SFD_CLOEXEC O_CLOEXEC
424# else
425# define SFD_CLOEXEC 02000000
426# endif
427# endif
428# ifdef __cplusplus
429extern "C" {
430# endif
431int signalfd (int fd, const sigset_t *mask, int flags);
432
433struct signalfd_siginfo
434{
435 uint32_t ssi_signo;
436 char pad[128 - sizeof (uint32_t)];
437};
438# ifdef __cplusplus
439}
440# endif
441#endif
442
443
85/**/ 444/**/
86 445
446#if EV_VERIFY >= 3
447# define EV_FREQUENT_CHECK ev_loop_verify (EV_A)
448#else
449# define EV_FREQUENT_CHECK do { } while (0)
450#endif
451
452/*
453 * This is used to avoid floating point rounding problems.
454 * It is added to ev_rt_now when scheduling periodics
455 * to ensure progress, time-wise, even when rounding
456 * errors are against us.
457 * This value is good at least till the year 4000.
458 * Better solutions welcome.
459 */
460#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
461
87#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 462#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
88#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 463#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
89#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
90/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
91 464
92#include "ev.h"
93
94#if __GNUC__ >= 3 465#if __GNUC__ >= 4
95# define expect(expr,value) __builtin_expect ((expr),(value)) 466# define expect(expr,value) __builtin_expect ((expr),(value))
96# define inline inline 467# define noinline __attribute__ ((noinline))
97#else 468#else
98# define expect(expr,value) (expr) 469# define expect(expr,value) (expr)
99# define inline static 470# define noinline
471# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
472# define inline
473# endif
100#endif 474#endif
101 475
102#define expect_false(expr) expect ((expr) != 0, 0) 476#define expect_false(expr) expect ((expr) != 0, 0)
103#define expect_true(expr) expect ((expr) != 0, 1) 477#define expect_true(expr) expect ((expr) != 0, 1)
478#define inline_size static inline
104 479
480#if EV_MINIMAL
481# define inline_speed static noinline
482#else
483# define inline_speed static inline
484#endif
485
105#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 486#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
487
488#if EV_MINPRI == EV_MAXPRI
489# define ABSPRI(w) (((W)w), 0)
490#else
106#define ABSPRI(w) ((w)->priority - EV_MINPRI) 491# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
492#endif
107 493
494#define EMPTY /* required for microsofts broken pseudo-c compiler */
495#define EMPTY2(a,b) /* used to suppress some warnings */
496
108typedef struct ev_watcher *W; 497typedef ev_watcher *W;
109typedef struct ev_watcher_list *WL; 498typedef ev_watcher_list *WL;
110typedef struct ev_watcher_time *WT; 499typedef ev_watcher_time *WT;
111 500
112static ev_tstamp now_floor, now, diff; /* monotonic clock */ 501#define ev_active(w) ((W)(w))->active
113ev_tstamp ev_now; 502#define ev_at(w) ((WT)(w))->at
114int ev_method;
115 503
116static int have_monotonic; /* runtime */ 504#if EV_USE_REALTIME
505/* sig_atomic_t is used to avoid per-thread variables or locking but still */
506/* giving it a reasonably high chance of working on typical architetcures */
507static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
508#endif
117 509
118static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 510#if EV_USE_MONOTONIC
119static void (*method_modify)(int fd, int oev, int nev); 511static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
120static void (*method_poll)(ev_tstamp timeout); 512#endif
513
514#ifndef EV_FD_TO_WIN32_HANDLE
515# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
516#endif
517#ifndef EV_WIN32_HANDLE_TO_FD
518# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
519#endif
520#ifndef EV_WIN32_CLOSE_FD
521# define EV_WIN32_CLOSE_FD(fd) close (fd)
522#endif
523
524#ifdef _WIN32
525# include "ev_win32.c"
526#endif
121 527
122/*****************************************************************************/ 528/*****************************************************************************/
123 529
530#if EV_AVOID_STDIO
531static void noinline
532ev_printerr (const char *msg)
533{
534 write (STDERR_FILENO, msg, strlen (msg));
535}
536#endif
537
538static void (*syserr_cb)(const char *msg);
539
540void
541ev_set_syserr_cb (void (*cb)(const char *msg))
542{
543 syserr_cb = cb;
544}
545
546static void noinline
547ev_syserr (const char *msg)
548{
549 if (!msg)
550 msg = "(libev) system error";
551
552 if (syserr_cb)
553 syserr_cb (msg);
554 else
555 {
556#if EV_AVOID_STDIO
557 const char *err = strerror (errno);
558
559 ev_printerr (msg);
560 ev_printerr (": ");
561 ev_printerr (err);
562 ev_printerr ("\n");
563#else
564 perror (msg);
565#endif
566 abort ();
567 }
568}
569
570static void *
571ev_realloc_emul (void *ptr, long size)
572{
573 /* some systems, notably openbsd and darwin, fail to properly
574 * implement realloc (x, 0) (as required by both ansi c-98 and
575 * the single unix specification, so work around them here.
576 */
577 if (size)
578 return realloc (ptr, size);
579
580 free (ptr);
581 return 0;
582}
583
584static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
585
586void
587ev_set_allocator (void *(*cb)(void *ptr, long size))
588{
589 alloc = cb;
590}
591
592inline_speed void *
593ev_realloc (void *ptr, long size)
594{
595 ptr = alloc (ptr, size);
596
597 if (!ptr && size)
598 {
599#if EV_AVOID_STDIO
600 ev_printerr ("libev: memory allocation failed, aborting.\n");
601#else
602 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
603#endif
604 abort ();
605 }
606
607 return ptr;
608}
609
610#define ev_malloc(size) ev_realloc (0, (size))
611#define ev_free(ptr) ev_realloc ((ptr), 0)
612
613/*****************************************************************************/
614
615/* set in reify when reification needed */
616#define EV_ANFD_REIFY 1
617
618/* file descriptor info structure */
619typedef struct
620{
621 WL head;
622 unsigned char events; /* the events watched for */
623 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
624 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
625 unsigned char unused;
626#if EV_USE_EPOLL
627 unsigned int egen; /* generation counter to counter epoll bugs */
628#endif
629#if EV_SELECT_IS_WINSOCKET
630 SOCKET handle;
631#endif
632} ANFD;
633
634/* stores the pending event set for a given watcher */
635typedef struct
636{
637 W w;
638 int events; /* the pending event set for the given watcher */
639} ANPENDING;
640
641#if EV_USE_INOTIFY
642/* hash table entry per inotify-id */
643typedef struct
644{
645 WL head;
646} ANFS;
647#endif
648
649/* Heap Entry */
650#if EV_HEAP_CACHE_AT
651 /* a heap element */
652 typedef struct {
653 ev_tstamp at;
654 WT w;
655 } ANHE;
656
657 #define ANHE_w(he) (he).w /* access watcher, read-write */
658 #define ANHE_at(he) (he).at /* access cached at, read-only */
659 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
660#else
661 /* a heap element */
662 typedef WT ANHE;
663
664 #define ANHE_w(he) (he)
665 #define ANHE_at(he) (he)->at
666 #define ANHE_at_cache(he)
667#endif
668
669#if EV_MULTIPLICITY
670
671 struct ev_loop
672 {
673 ev_tstamp ev_rt_now;
674 #define ev_rt_now ((loop)->ev_rt_now)
675 #define VAR(name,decl) decl;
676 #include "ev_vars.h"
677 #undef VAR
678 };
679 #include "ev_wrap.h"
680
681 static struct ev_loop default_loop_struct;
682 struct ev_loop *ev_default_loop_ptr;
683
684#else
685
686 ev_tstamp ev_rt_now;
687 #define VAR(name,decl) static decl;
688 #include "ev_vars.h"
689 #undef VAR
690
691 static int ev_default_loop_ptr;
692
693#endif
694
695#if EV_MINIMAL < 2
696# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
697# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
698# define EV_INVOKE_PENDING invoke_cb (EV_A)
699#else
700# define EV_RELEASE_CB (void)0
701# define EV_ACQUIRE_CB (void)0
702# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
703#endif
704
705#define EVUNLOOP_RECURSE 0x80
706
707/*****************************************************************************/
708
709#ifndef EV_HAVE_EV_TIME
124ev_tstamp 710ev_tstamp
125ev_time (void) 711ev_time (void)
126{ 712{
127#if EV_USE_REALTIME 713#if EV_USE_REALTIME
714 if (expect_true (have_realtime))
715 {
128 struct timespec ts; 716 struct timespec ts;
129 clock_gettime (CLOCK_REALTIME, &ts); 717 clock_gettime (CLOCK_REALTIME, &ts);
130 return ts.tv_sec + ts.tv_nsec * 1e-9; 718 return ts.tv_sec + ts.tv_nsec * 1e-9;
131#else 719 }
720#endif
721
132 struct timeval tv; 722 struct timeval tv;
133 gettimeofday (&tv, 0); 723 gettimeofday (&tv, 0);
134 return tv.tv_sec + tv.tv_usec * 1e-6; 724 return tv.tv_sec + tv.tv_usec * 1e-6;
135#endif
136} 725}
726#endif
137 727
138static ev_tstamp 728inline_size ev_tstamp
139get_clock (void) 729get_clock (void)
140{ 730{
141#if EV_USE_MONOTONIC 731#if EV_USE_MONOTONIC
142 if (expect_true (have_monotonic)) 732 if (expect_true (have_monotonic))
143 { 733 {
… …
148#endif 738#endif
149 739
150 return ev_time (); 740 return ev_time ();
151} 741}
152 742
153#define array_roundsize(base,n) ((n) | 4 & ~3) 743#if EV_MULTIPLICITY
744ev_tstamp
745ev_now (EV_P)
746{
747 return ev_rt_now;
748}
749#endif
154 750
155#define array_needsize(base,cur,cnt,init) \ 751void
156 if (expect_false ((cnt) > cur)) \ 752ev_sleep (ev_tstamp delay)
157 { \ 753{
158 int newcnt = cur; \ 754 if (delay > 0.)
159 do \
160 { \
161 newcnt = array_roundsize (base, newcnt << 1); \
162 } \
163 while ((cnt) > newcnt); \
164 \
165 base = realloc (base, sizeof (*base) * (newcnt)); \
166 init (base + cur, newcnt - cur); \
167 cur = newcnt; \
168 } 755 {
756#if EV_USE_NANOSLEEP
757 struct timespec ts;
758
759 ts.tv_sec = (time_t)delay;
760 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
761
762 nanosleep (&ts, 0);
763#elif defined(_WIN32)
764 Sleep ((unsigned long)(delay * 1e3));
765#else
766 struct timeval tv;
767
768 tv.tv_sec = (time_t)delay;
769 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
770
771 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
772 /* something not guaranteed by newer posix versions, but guaranteed */
773 /* by older ones */
774 select (0, 0, 0, 0, &tv);
775#endif
776 }
777}
169 778
170/*****************************************************************************/ 779/*****************************************************************************/
171 780
172typedef struct 781#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
173{
174 struct ev_io *head;
175 unsigned char events;
176 unsigned char reify;
177} ANFD;
178 782
179static ANFD *anfds; 783/* find a suitable new size for the given array, */
180static int anfdmax; 784/* hopefully by rounding to a ncie-to-malloc size */
181 785inline_size int
182static void 786array_nextsize (int elem, int cur, int cnt)
183anfds_init (ANFD *base, int count)
184{ 787{
185 while (count--) 788 int ncur = cur + 1;
186 {
187 base->head = 0;
188 base->events = EV_NONE;
189 base->reify = 0;
190 789
191 ++base; 790 do
791 ncur <<= 1;
792 while (cnt > ncur);
793
794 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
795 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
192 } 796 {
193} 797 ncur *= elem;
194 798 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
195typedef struct 799 ncur = ncur - sizeof (void *) * 4;
196{ 800 ncur /= elem;
197 W w;
198 int events;
199} ANPENDING;
200
201static ANPENDING *pendings [NUMPRI];
202static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
203
204static void
205event (W w, int events)
206{
207 if (w->pending)
208 { 801 }
802
803 return ncur;
804}
805
806static noinline void *
807array_realloc (int elem, void *base, int *cur, int cnt)
808{
809 *cur = array_nextsize (elem, *cur, cnt);
810 return ev_realloc (base, elem * *cur);
811}
812
813#define array_init_zero(base,count) \
814 memset ((void *)(base), 0, sizeof (*(base)) * (count))
815
816#define array_needsize(type,base,cur,cnt,init) \
817 if (expect_false ((cnt) > (cur))) \
818 { \
819 int ocur_ = (cur); \
820 (base) = (type *)array_realloc \
821 (sizeof (type), (base), &(cur), (cnt)); \
822 init ((base) + (ocur_), (cur) - ocur_); \
823 }
824
825#if 0
826#define array_slim(type,stem) \
827 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
828 { \
829 stem ## max = array_roundsize (stem ## cnt >> 1); \
830 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
831 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
832 }
833#endif
834
835#define array_free(stem, idx) \
836 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
837
838/*****************************************************************************/
839
840/* dummy callback for pending events */
841static void noinline
842pendingcb (EV_P_ ev_prepare *w, int revents)
843{
844}
845
846void noinline
847ev_feed_event (EV_P_ void *w, int revents)
848{
849 W w_ = (W)w;
850 int pri = ABSPRI (w_);
851
852 if (expect_false (w_->pending))
853 pendings [pri][w_->pending - 1].events |= revents;
854 else
855 {
856 w_->pending = ++pendingcnt [pri];
857 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
858 pendings [pri][w_->pending - 1].w = w_;
209 pendings [ABSPRI (w)][w->pending - 1].events |= events; 859 pendings [pri][w_->pending - 1].events = revents;
210 return;
211 } 860 }
212
213 w->pending = ++pendingcnt [ABSPRI (w)];
214 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
215 pendings [ABSPRI (w)][w->pending - 1].w = w;
216 pendings [ABSPRI (w)][w->pending - 1].events = events;
217} 861}
218 862
219static void 863inline_speed void
864feed_reverse (EV_P_ W w)
865{
866 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
867 rfeeds [rfeedcnt++] = w;
868}
869
870inline_size void
871feed_reverse_done (EV_P_ int revents)
872{
873 do
874 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
875 while (rfeedcnt);
876}
877
878inline_speed void
220queue_events (W *events, int eventcnt, int type) 879queue_events (EV_P_ W *events, int eventcnt, int type)
221{ 880{
222 int i; 881 int i;
223 882
224 for (i = 0; i < eventcnt; ++i) 883 for (i = 0; i < eventcnt; ++i)
225 event (events [i], type); 884 ev_feed_event (EV_A_ events [i], type);
226} 885}
227 886
228static void 887/*****************************************************************************/
888
889inline_speed void
229fd_event (int fd, int events) 890fd_event_nc (EV_P_ int fd, int revents)
230{ 891{
231 ANFD *anfd = anfds + fd; 892 ANFD *anfd = anfds + fd;
232 struct ev_io *w; 893 ev_io *w;
233 894
234 for (w = anfd->head; w; w = w->next) 895 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
235 { 896 {
236 int ev = w->events & events; 897 int ev = w->events & revents;
237 898
238 if (ev) 899 if (ev)
239 event ((W)w, ev); 900 ev_feed_event (EV_A_ (W)w, ev);
240 } 901 }
241} 902}
242 903
243/*****************************************************************************/ 904/* do not submit kernel events for fds that have reify set */
905/* because that means they changed while we were polling for new events */
906inline_speed void
907fd_event (EV_P_ int fd, int revents)
908{
909 ANFD *anfd = anfds + fd;
244 910
245static int *fdchanges; 911 if (expect_true (!anfd->reify))
246static int fdchangemax, fdchangecnt; 912 fd_event_nc (EV_A_ fd, revents);
913}
247 914
248static void 915void
249fd_reify (void) 916ev_feed_fd_event (EV_P_ int fd, int revents)
917{
918 if (fd >= 0 && fd < anfdmax)
919 fd_event_nc (EV_A_ fd, revents);
920}
921
922/* make sure the external fd watch events are in-sync */
923/* with the kernel/libev internal state */
924inline_size void
925fd_reify (EV_P)
250{ 926{
251 int i; 927 int i;
252 928
253 for (i = 0; i < fdchangecnt; ++i) 929 for (i = 0; i < fdchangecnt; ++i)
254 { 930 {
255 int fd = fdchanges [i]; 931 int fd = fdchanges [i];
256 ANFD *anfd = anfds + fd; 932 ANFD *anfd = anfds + fd;
257 struct ev_io *w; 933 ev_io *w;
258 934
259 int events = 0; 935 unsigned char events = 0;
260 936
261 for (w = anfd->head; w; w = w->next) 937 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
262 events |= w->events; 938 events |= (unsigned char)w->events;
263 939
264 anfd->reify = 0; 940#if EV_SELECT_IS_WINSOCKET
265 941 if (events)
266 if (anfd->events != events)
267 { 942 {
268 method_modify (fd, anfd->events, events); 943 unsigned long arg;
269 anfd->events = events; 944 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
945 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
270 } 946 }
947#endif
948
949 {
950 unsigned char o_events = anfd->events;
951 unsigned char o_reify = anfd->reify;
952
953 anfd->reify = 0;
954 anfd->events = events;
955
956 if (o_events != events || o_reify & EV__IOFDSET)
957 backend_modify (EV_A_ fd, o_events, events);
958 }
271 } 959 }
272 960
273 fdchangecnt = 0; 961 fdchangecnt = 0;
274} 962}
275 963
276static void 964/* something about the given fd changed */
277fd_change (int fd) 965inline_size void
966fd_change (EV_P_ int fd, int flags)
278{ 967{
279 if (anfds [fd].reify || fdchangecnt < 0) 968 unsigned char reify = anfds [fd].reify;
280 return;
281
282 anfds [fd].reify = 1; 969 anfds [fd].reify |= flags;
283 970
971 if (expect_true (!reify))
972 {
284 ++fdchangecnt; 973 ++fdchangecnt;
285 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 974 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
286 fdchanges [fdchangecnt - 1] = fd; 975 fdchanges [fdchangecnt - 1] = fd;
976 }
287} 977}
288 978
289static void 979/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
980inline_speed void
290fd_kill (int fd) 981fd_kill (EV_P_ int fd)
291{ 982{
292 struct ev_io *w; 983 ev_io *w;
293 984
294 printf ("killing fd %d\n", fd);//D
295 while ((w = anfds [fd].head)) 985 while ((w = (ev_io *)anfds [fd].head))
296 { 986 {
297 ev_io_stop (w); 987 ev_io_stop (EV_A_ w);
298 event ((W)w, EV_ERROR | EV_READ | EV_WRITE); 988 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
299 } 989 }
990}
991
992/* check whether the given fd is atcually valid, for error recovery */
993inline_size int
994fd_valid (int fd)
995{
996#ifdef _WIN32
997 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
998#else
999 return fcntl (fd, F_GETFD) != -1;
1000#endif
300} 1001}
301 1002
302/* called on EBADF to verify fds */ 1003/* called on EBADF to verify fds */
303static void 1004static void noinline
304fd_ebadf (void) 1005fd_ebadf (EV_P)
305{ 1006{
306 int fd; 1007 int fd;
307 1008
308 for (fd = 0; fd < anfdmax; ++fd) 1009 for (fd = 0; fd < anfdmax; ++fd)
309 if (anfds [fd].events) 1010 if (anfds [fd].events)
310 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 1011 if (!fd_valid (fd) && errno == EBADF)
311 fd_kill (fd); 1012 fd_kill (EV_A_ fd);
312} 1013}
313 1014
314/* called on ENOMEM in select/poll to kill some fds and retry */ 1015/* called on ENOMEM in select/poll to kill some fds and retry */
315static void 1016static void noinline
316fd_enomem (void) 1017fd_enomem (EV_P)
317{ 1018{
318 int fd = anfdmax; 1019 int fd;
319 1020
320 while (fd--) 1021 for (fd = anfdmax; fd--; )
321 if (anfds [fd].events) 1022 if (anfds [fd].events)
322 { 1023 {
323 close (fd);
324 fd_kill (fd); 1024 fd_kill (EV_A_ fd);
325 return; 1025 break;
326 } 1026 }
327} 1027}
328 1028
1029/* usually called after fork if backend needs to re-arm all fds from scratch */
1030static void noinline
1031fd_rearm_all (EV_P)
1032{
1033 int fd;
1034
1035 for (fd = 0; fd < anfdmax; ++fd)
1036 if (anfds [fd].events)
1037 {
1038 anfds [fd].events = 0;
1039 anfds [fd].emask = 0;
1040 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1041 }
1042}
1043
329/*****************************************************************************/ 1044/*****************************************************************************/
330 1045
331static struct ev_timer **timers; 1046/*
332static int timermax, timercnt; 1047 * the heap functions want a real array index. array index 0 uis guaranteed to not
1048 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1049 * the branching factor of the d-tree.
1050 */
333 1051
334static struct ev_periodic **periodics; 1052/*
335static int periodicmax, periodiccnt; 1053 * at the moment we allow libev the luxury of two heaps,
1054 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1055 * which is more cache-efficient.
1056 * the difference is about 5% with 50000+ watchers.
1057 */
1058#if EV_USE_4HEAP
336 1059
1060#define DHEAP 4
1061#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1062#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1063#define UPHEAP_DONE(p,k) ((p) == (k))
1064
1065/* away from the root */
1066inline_speed void
1067downheap (ANHE *heap, int N, int k)
1068{
1069 ANHE he = heap [k];
1070 ANHE *E = heap + N + HEAP0;
1071
1072 for (;;)
1073 {
1074 ev_tstamp minat;
1075 ANHE *minpos;
1076 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1077
1078 /* find minimum child */
1079 if (expect_true (pos + DHEAP - 1 < E))
1080 {
1081 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1082 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1083 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1084 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1085 }
1086 else if (pos < E)
1087 {
1088 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1089 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1090 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1091 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1092 }
1093 else
1094 break;
1095
1096 if (ANHE_at (he) <= minat)
1097 break;
1098
1099 heap [k] = *minpos;
1100 ev_active (ANHE_w (*minpos)) = k;
1101
1102 k = minpos - heap;
1103 }
1104
1105 heap [k] = he;
1106 ev_active (ANHE_w (he)) = k;
1107}
1108
1109#else /* 4HEAP */
1110
1111#define HEAP0 1
1112#define HPARENT(k) ((k) >> 1)
1113#define UPHEAP_DONE(p,k) (!(p))
1114
1115/* away from the root */
1116inline_speed void
1117downheap (ANHE *heap, int N, int k)
1118{
1119 ANHE he = heap [k];
1120
1121 for (;;)
1122 {
1123 int c = k << 1;
1124
1125 if (c >= N + HEAP0)
1126 break;
1127
1128 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1129 ? 1 : 0;
1130
1131 if (ANHE_at (he) <= ANHE_at (heap [c]))
1132 break;
1133
1134 heap [k] = heap [c];
1135 ev_active (ANHE_w (heap [k])) = k;
1136
1137 k = c;
1138 }
1139
1140 heap [k] = he;
1141 ev_active (ANHE_w (he)) = k;
1142}
1143#endif
1144
1145/* towards the root */
1146inline_speed void
1147upheap (ANHE *heap, int k)
1148{
1149 ANHE he = heap [k];
1150
1151 for (;;)
1152 {
1153 int p = HPARENT (k);
1154
1155 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1156 break;
1157
1158 heap [k] = heap [p];
1159 ev_active (ANHE_w (heap [k])) = k;
1160 k = p;
1161 }
1162
1163 heap [k] = he;
1164 ev_active (ANHE_w (he)) = k;
1165}
1166
1167/* move an element suitably so it is in a correct place */
1168inline_size void
1169adjustheap (ANHE *heap, int N, int k)
1170{
1171 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1172 upheap (heap, k);
1173 else
1174 downheap (heap, N, k);
1175}
1176
1177/* rebuild the heap: this function is used only once and executed rarely */
1178inline_size void
1179reheap (ANHE *heap, int N)
1180{
1181 int i;
1182
1183 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1184 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1185 for (i = 0; i < N; ++i)
1186 upheap (heap, i + HEAP0);
1187}
1188
1189/*****************************************************************************/
1190
1191/* associate signal watchers to a signal signal */
1192typedef struct
1193{
1194 EV_ATOMIC_T pending;
1195#if EV_MULTIPLICITY
1196 EV_P;
1197#endif
1198 WL head;
1199} ANSIG;
1200
1201static ANSIG signals [EV_NSIG - 1];
1202
1203/*****************************************************************************/
1204
1205/* used to prepare libev internal fd's */
1206/* this is not fork-safe */
1207inline_speed void
1208fd_intern (int fd)
1209{
1210#ifdef _WIN32
1211 unsigned long arg = 1;
1212 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1213#else
1214 fcntl (fd, F_SETFD, FD_CLOEXEC);
1215 fcntl (fd, F_SETFL, O_NONBLOCK);
1216#endif
1217}
1218
1219static void noinline
1220evpipe_init (EV_P)
1221{
1222 if (!ev_is_active (&pipe_w))
1223 {
1224#if EV_USE_EVENTFD
1225 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1226 if (evfd < 0 && errno == EINVAL)
1227 evfd = eventfd (0, 0);
1228
1229 if (evfd >= 0)
1230 {
1231 evpipe [0] = -1;
1232 fd_intern (evfd); /* doing it twice doesn't hurt */
1233 ev_io_set (&pipe_w, evfd, EV_READ);
1234 }
1235 else
1236#endif
1237 {
1238 while (pipe (evpipe))
1239 ev_syserr ("(libev) error creating signal/async pipe");
1240
1241 fd_intern (evpipe [0]);
1242 fd_intern (evpipe [1]);
1243 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1244 }
1245
1246 ev_io_start (EV_A_ &pipe_w);
1247 ev_unref (EV_A); /* watcher should not keep loop alive */
1248 }
1249}
1250
1251inline_size void
1252evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1253{
1254 if (!*flag)
1255 {
1256 int old_errno = errno; /* save errno because write might clobber it */
1257
1258 *flag = 1;
1259
1260#if EV_USE_EVENTFD
1261 if (evfd >= 0)
1262 {
1263 uint64_t counter = 1;
1264 write (evfd, &counter, sizeof (uint64_t));
1265 }
1266 else
1267#endif
1268 write (evpipe [1], &old_errno, 1);
1269
1270 errno = old_errno;
1271 }
1272}
1273
1274/* called whenever the libev signal pipe */
1275/* got some events (signal, async) */
337static void 1276static void
338upheap (WT *timers, int k) 1277pipecb (EV_P_ ev_io *iow, int revents)
339{ 1278{
340 WT w = timers [k]; 1279 int i;
341 1280
342 while (k && timers [k >> 1]->at > w->at) 1281#if EV_USE_EVENTFD
343 { 1282 if (evfd >= 0)
344 timers [k] = timers [k >> 1];
345 timers [k]->active = k + 1;
346 k >>= 1;
347 } 1283 {
1284 uint64_t counter;
1285 read (evfd, &counter, sizeof (uint64_t));
1286 }
1287 else
1288#endif
1289 {
1290 char dummy;
1291 read (evpipe [0], &dummy, 1);
1292 }
348 1293
349 timers [k] = w; 1294 if (sig_pending)
350 timers [k]->active = k + 1; 1295 {
1296 sig_pending = 0;
351 1297
1298 for (i = EV_NSIG - 1; i--; )
1299 if (expect_false (signals [i].pending))
1300 ev_feed_signal_event (EV_A_ i + 1);
1301 }
1302
1303#if EV_ASYNC_ENABLE
1304 if (async_pending)
1305 {
1306 async_pending = 0;
1307
1308 for (i = asynccnt; i--; )
1309 if (asyncs [i]->sent)
1310 {
1311 asyncs [i]->sent = 0;
1312 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1313 }
1314 }
1315#endif
352} 1316}
1317
1318/*****************************************************************************/
353 1319
354static void 1320static void
355downheap (WT *timers, int N, int k) 1321ev_sighandler (int signum)
356{ 1322{
357 WT w = timers [k]; 1323#if EV_MULTIPLICITY
1324 EV_P = signals [signum - 1].loop;
1325#endif
358 1326
359 while (k < (N >> 1)) 1327#ifdef _WIN32
360 { 1328 signal (signum, ev_sighandler);
361 int j = k << 1; 1329#endif
362 1330
363 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 1331 signals [signum - 1].pending = 1;
364 ++j; 1332 evpipe_write (EV_A_ &sig_pending);
1333}
365 1334
366 if (w->at <= timers [j]->at) 1335void noinline
1336ev_feed_signal_event (EV_P_ int signum)
1337{
1338 WL w;
1339
1340 if (expect_false (signum <= 0 || signum > EV_NSIG))
1341 return;
1342
1343 --signum;
1344
1345#if EV_MULTIPLICITY
1346 /* it is permissible to try to feed a signal to the wrong loop */
1347 /* or, likely more useful, feeding a signal nobody is waiting for */
1348
1349 if (expect_false (signals [signum].loop != EV_A))
1350 return;
1351#endif
1352
1353 signals [signum].pending = 0;
1354
1355 for (w = signals [signum].head; w; w = w->next)
1356 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1357}
1358
1359#if EV_USE_SIGNALFD
1360static void
1361sigfdcb (EV_P_ ev_io *iow, int revents)
1362{
1363 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1364
1365 for (;;)
1366 {
1367 ssize_t res = read (sigfd, si, sizeof (si));
1368
1369 /* not ISO-C, as res might be -1, but works with SuS */
1370 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1371 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1372
1373 if (res < (ssize_t)sizeof (si))
367 break; 1374 break;
368
369 timers [k] = timers [j];
370 timers [k]->active = k + 1;
371 k = j;
372 } 1375 }
373
374 timers [k] = w;
375 timers [k]->active = k + 1;
376} 1376}
1377#endif
377 1378
378/*****************************************************************************/ 1379/*****************************************************************************/
379 1380
380typedef struct 1381static WL childs [EV_PID_HASHSIZE];
381{
382 struct ev_signal *head;
383 sig_atomic_t volatile gotsig;
384} ANSIG;
385 1382
386static ANSIG *signals; 1383#ifndef _WIN32
387static int signalmax;
388 1384
389static int sigpipe [2];
390static sig_atomic_t volatile gotsig;
391static struct ev_io sigev;
392
393static void
394signals_init (ANSIG *base, int count)
395{
396 while (count--)
397 {
398 base->head = 0;
399 base->gotsig = 0;
400
401 ++base;
402 }
403}
404
405static void
406sighandler (int signum)
407{
408 signals [signum - 1].gotsig = 1;
409
410 if (!gotsig)
411 {
412 gotsig = 1;
413 write (sigpipe [1], &signum, 1);
414 }
415}
416
417static void
418sigcb (struct ev_io *iow, int revents)
419{
420 struct ev_signal *w;
421 int signum;
422
423 read (sigpipe [0], &revents, 1);
424 gotsig = 0;
425
426 for (signum = signalmax; signum--; )
427 if (signals [signum].gotsig)
428 {
429 signals [signum].gotsig = 0;
430
431 for (w = signals [signum].head; w; w = w->next)
432 event ((W)w, EV_SIGNAL);
433 }
434}
435
436static void
437siginit (void)
438{
439 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
440 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
441
442 /* rather than sort out wether we really need nb, set it */
443 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
444 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
445
446 ev_io_set (&sigev, sigpipe [0], EV_READ);
447 ev_io_start (&sigev);
448}
449
450/*****************************************************************************/
451
452static struct ev_idle **idles;
453static int idlemax, idlecnt;
454
455static struct ev_prepare **prepares;
456static int preparemax, preparecnt;
457
458static struct ev_check **checks;
459static int checkmax, checkcnt;
460
461/*****************************************************************************/
462
463static struct ev_child *childs [PID_HASHSIZE];
464static struct ev_signal childev; 1385static ev_signal childev;
1386
1387#ifndef WIFCONTINUED
1388# define WIFCONTINUED(status) 0
1389#endif
1390
1391/* handle a single child status event */
1392inline_speed void
1393child_reap (EV_P_ int chain, int pid, int status)
1394{
1395 ev_child *w;
1396 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1397
1398 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1399 {
1400 if ((w->pid == pid || !w->pid)
1401 && (!traced || (w->flags & 1)))
1402 {
1403 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1404 w->rpid = pid;
1405 w->rstatus = status;
1406 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1407 }
1408 }
1409}
465 1410
466#ifndef WCONTINUED 1411#ifndef WCONTINUED
467# define WCONTINUED 0 1412# define WCONTINUED 0
468#endif 1413#endif
469 1414
1415/* called on sigchld etc., calls waitpid */
470static void 1416static void
471childcb (struct ev_signal *sw, int revents) 1417childcb (EV_P_ ev_signal *sw, int revents)
472{ 1418{
473 struct ev_child *w;
474 int pid, status; 1419 int pid, status;
475 1420
1421 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
476 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1422 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
477 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1423 if (!WCONTINUED
478 if (w->pid == pid || !w->pid) 1424 || errno != EINVAL
479 { 1425 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
480 w->status = status; 1426 return;
481 event ((W)w, EV_CHILD); 1427
482 } 1428 /* make sure we are called again until all children have been reaped */
1429 /* we need to do it this way so that the callback gets called before we continue */
1430 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1431
1432 child_reap (EV_A_ pid, pid, status);
1433 if (EV_PID_HASHSIZE > 1)
1434 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
483} 1435}
1436
1437#endif
484 1438
485/*****************************************************************************/ 1439/*****************************************************************************/
486 1440
1441#if EV_USE_PORT
1442# include "ev_port.c"
1443#endif
1444#if EV_USE_KQUEUE
1445# include "ev_kqueue.c"
1446#endif
487#if EV_USE_EPOLL 1447#if EV_USE_EPOLL
488# include "ev_epoll.c" 1448# include "ev_epoll.c"
489#endif 1449#endif
490#if EV_USE_POLL 1450#if EV_USE_POLL
491# include "ev_poll.c" 1451# include "ev_poll.c"
… …
504ev_version_minor (void) 1464ev_version_minor (void)
505{ 1465{
506 return EV_VERSION_MINOR; 1466 return EV_VERSION_MINOR;
507} 1467}
508 1468
509/* return true if we are running with elevated privileges and ignore env variables */ 1469/* return true if we are running with elevated privileges and should ignore env variables */
510static int 1470int inline_size
511enable_secure () 1471enable_secure (void)
512{ 1472{
1473#ifdef _WIN32
1474 return 0;
1475#else
513 return getuid () != geteuid () 1476 return getuid () != geteuid ()
514 || getgid () != getegid (); 1477 || getgid () != getegid ();
1478#endif
515} 1479}
516 1480
517int ev_init (int methods) 1481unsigned int
1482ev_supported_backends (void)
518{ 1483{
519 if (!ev_method) 1484 unsigned int flags = 0;
1485
1486 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1487 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1488 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1489 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1490 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1491
1492 return flags;
1493}
1494
1495unsigned int
1496ev_recommended_backends (void)
1497{
1498 unsigned int flags = ev_supported_backends ();
1499
1500#ifndef __NetBSD__
1501 /* kqueue is borked on everything but netbsd apparently */
1502 /* it usually doesn't work correctly on anything but sockets and pipes */
1503 flags &= ~EVBACKEND_KQUEUE;
1504#endif
1505#ifdef __APPLE__
1506 /* only select works correctly on that "unix-certified" platform */
1507 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1508 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1509#endif
1510
1511 return flags;
1512}
1513
1514unsigned int
1515ev_embeddable_backends (void)
1516{
1517 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1518
1519 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1520 /* please fix it and tell me how to detect the fix */
1521 flags &= ~EVBACKEND_EPOLL;
1522
1523 return flags;
1524}
1525
1526unsigned int
1527ev_backend (EV_P)
1528{
1529 return backend;
1530}
1531
1532#if EV_MINIMAL < 2
1533unsigned int
1534ev_loop_count (EV_P)
1535{
1536 return loop_count;
1537}
1538
1539unsigned int
1540ev_loop_depth (EV_P)
1541{
1542 return loop_depth;
1543}
1544
1545void
1546ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1547{
1548 io_blocktime = interval;
1549}
1550
1551void
1552ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1553{
1554 timeout_blocktime = interval;
1555}
1556
1557void
1558ev_set_userdata (EV_P_ void *data)
1559{
1560 userdata = data;
1561}
1562
1563void *
1564ev_userdata (EV_P)
1565{
1566 return userdata;
1567}
1568
1569void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1570{
1571 invoke_cb = invoke_pending_cb;
1572}
1573
1574void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1575{
1576 release_cb = release;
1577 acquire_cb = acquire;
1578}
1579#endif
1580
1581/* initialise a loop structure, must be zero-initialised */
1582static void noinline
1583loop_init (EV_P_ unsigned int flags)
1584{
1585 if (!backend)
520 { 1586 {
1587#if EV_USE_REALTIME
1588 if (!have_realtime)
1589 {
1590 struct timespec ts;
1591
1592 if (!clock_gettime (CLOCK_REALTIME, &ts))
1593 have_realtime = 1;
1594 }
1595#endif
1596
521#if EV_USE_MONOTONIC 1597#if EV_USE_MONOTONIC
1598 if (!have_monotonic)
1599 {
1600 struct timespec ts;
1601
1602 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1603 have_monotonic = 1;
1604 }
1605#endif
1606
1607 /* pid check not overridable via env */
1608#ifndef _WIN32
1609 if (flags & EVFLAG_FORKCHECK)
1610 curpid = getpid ();
1611#endif
1612
1613 if (!(flags & EVFLAG_NOENV)
1614 && !enable_secure ()
1615 && getenv ("LIBEV_FLAGS"))
1616 flags = atoi (getenv ("LIBEV_FLAGS"));
1617
1618 ev_rt_now = ev_time ();
1619 mn_now = get_clock ();
1620 now_floor = mn_now;
1621 rtmn_diff = ev_rt_now - mn_now;
1622#if EV_MINIMAL < 2
1623 invoke_cb = ev_invoke_pending;
1624#endif
1625
1626 io_blocktime = 0.;
1627 timeout_blocktime = 0.;
1628 backend = 0;
1629 backend_fd = -1;
1630 sig_pending = 0;
1631#if EV_ASYNC_ENABLE
1632 async_pending = 0;
1633#endif
1634#if EV_USE_INOTIFY
1635 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1636#endif
1637#if EV_USE_SIGNALFD
1638 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1639#endif
1640
1641 if (!(flags & 0x0000ffffU))
1642 flags |= ev_recommended_backends ();
1643
1644#if EV_USE_PORT
1645 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1646#endif
1647#if EV_USE_KQUEUE
1648 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1649#endif
1650#if EV_USE_EPOLL
1651 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1652#endif
1653#if EV_USE_POLL
1654 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1655#endif
1656#if EV_USE_SELECT
1657 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1658#endif
1659
1660 ev_prepare_init (&pending_w, pendingcb);
1661
1662 ev_init (&pipe_w, pipecb);
1663 ev_set_priority (&pipe_w, EV_MAXPRI);
1664 }
1665}
1666
1667/* free up a loop structure */
1668static void noinline
1669loop_destroy (EV_P)
1670{
1671 int i;
1672
1673 if (ev_is_active (&pipe_w))
1674 {
1675 /*ev_ref (EV_A);*/
1676 /*ev_io_stop (EV_A_ &pipe_w);*/
1677
1678#if EV_USE_EVENTFD
1679 if (evfd >= 0)
1680 close (evfd);
1681#endif
1682
1683 if (evpipe [0] >= 0)
1684 {
1685 EV_WIN32_CLOSE_FD (evpipe [0]);
1686 EV_WIN32_CLOSE_FD (evpipe [1]);
1687 }
1688 }
1689
1690#if EV_USE_SIGNALFD
1691 if (ev_is_active (&sigfd_w))
1692 close (sigfd);
1693#endif
1694
1695#if EV_USE_INOTIFY
1696 if (fs_fd >= 0)
1697 close (fs_fd);
1698#endif
1699
1700 if (backend_fd >= 0)
1701 close (backend_fd);
1702
1703#if EV_USE_PORT
1704 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1705#endif
1706#if EV_USE_KQUEUE
1707 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1708#endif
1709#if EV_USE_EPOLL
1710 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1711#endif
1712#if EV_USE_POLL
1713 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1714#endif
1715#if EV_USE_SELECT
1716 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1717#endif
1718
1719 for (i = NUMPRI; i--; )
1720 {
1721 array_free (pending, [i]);
1722#if EV_IDLE_ENABLE
1723 array_free (idle, [i]);
1724#endif
1725 }
1726
1727 ev_free (anfds); anfds = 0; anfdmax = 0;
1728
1729 /* have to use the microsoft-never-gets-it-right macro */
1730 array_free (rfeed, EMPTY);
1731 array_free (fdchange, EMPTY);
1732 array_free (timer, EMPTY);
1733#if EV_PERIODIC_ENABLE
1734 array_free (periodic, EMPTY);
1735#endif
1736#if EV_FORK_ENABLE
1737 array_free (fork, EMPTY);
1738#endif
1739 array_free (prepare, EMPTY);
1740 array_free (check, EMPTY);
1741#if EV_ASYNC_ENABLE
1742 array_free (async, EMPTY);
1743#endif
1744
1745 backend = 0;
1746}
1747
1748#if EV_USE_INOTIFY
1749inline_size void infy_fork (EV_P);
1750#endif
1751
1752inline_size void
1753loop_fork (EV_P)
1754{
1755#if EV_USE_PORT
1756 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1757#endif
1758#if EV_USE_KQUEUE
1759 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
1760#endif
1761#if EV_USE_EPOLL
1762 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1763#endif
1764#if EV_USE_INOTIFY
1765 infy_fork (EV_A);
1766#endif
1767
1768 if (ev_is_active (&pipe_w))
1769 {
1770 /* this "locks" the handlers against writing to the pipe */
1771 /* while we modify the fd vars */
1772 sig_pending = 1;
1773#if EV_ASYNC_ENABLE
1774 async_pending = 1;
1775#endif
1776
1777 ev_ref (EV_A);
1778 ev_io_stop (EV_A_ &pipe_w);
1779
1780#if EV_USE_EVENTFD
1781 if (evfd >= 0)
1782 close (evfd);
1783#endif
1784
1785 if (evpipe [0] >= 0)
1786 {
1787 EV_WIN32_CLOSE_FD (evpipe [0]);
1788 EV_WIN32_CLOSE_FD (evpipe [1]);
1789 }
1790
1791 evpipe_init (EV_A);
1792 /* now iterate over everything, in case we missed something */
1793 pipecb (EV_A_ &pipe_w, EV_READ);
1794 }
1795
1796 postfork = 0;
1797}
1798
1799#if EV_MULTIPLICITY
1800
1801struct ev_loop *
1802ev_loop_new (unsigned int flags)
1803{
1804 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1805
1806 memset (EV_A, 0, sizeof (struct ev_loop));
1807 loop_init (EV_A_ flags);
1808
1809 if (ev_backend (EV_A))
1810 return EV_A;
1811
1812 return 0;
1813}
1814
1815void
1816ev_loop_destroy (EV_P)
1817{
1818 loop_destroy (EV_A);
1819 ev_free (loop);
1820}
1821
1822void
1823ev_loop_fork (EV_P)
1824{
1825 postfork = 1; /* must be in line with ev_default_fork */
1826}
1827#endif /* multiplicity */
1828
1829#if EV_VERIFY
1830static void noinline
1831verify_watcher (EV_P_ W w)
1832{
1833 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1834
1835 if (w->pending)
1836 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1837}
1838
1839static void noinline
1840verify_heap (EV_P_ ANHE *heap, int N)
1841{
1842 int i;
1843
1844 for (i = HEAP0; i < N + HEAP0; ++i)
1845 {
1846 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1847 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1848 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1849
1850 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1851 }
1852}
1853
1854static void noinline
1855array_verify (EV_P_ W *ws, int cnt)
1856{
1857 while (cnt--)
1858 {
1859 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1860 verify_watcher (EV_A_ ws [cnt]);
1861 }
1862}
1863#endif
1864
1865#if EV_MINIMAL < 2
1866void
1867ev_loop_verify (EV_P)
1868{
1869#if EV_VERIFY
1870 int i;
1871 WL w;
1872
1873 assert (activecnt >= -1);
1874
1875 assert (fdchangemax >= fdchangecnt);
1876 for (i = 0; i < fdchangecnt; ++i)
1877 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1878
1879 assert (anfdmax >= 0);
1880 for (i = 0; i < anfdmax; ++i)
1881 for (w = anfds [i].head; w; w = w->next)
522 { 1882 {
523 struct timespec ts; 1883 verify_watcher (EV_A_ (W)w);
524 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 1884 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
525 have_monotonic = 1; 1885 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
526 } 1886 }
1887
1888 assert (timermax >= timercnt);
1889 verify_heap (EV_A_ timers, timercnt);
1890
1891#if EV_PERIODIC_ENABLE
1892 assert (periodicmax >= periodiccnt);
1893 verify_heap (EV_A_ periodics, periodiccnt);
1894#endif
1895
1896 for (i = NUMPRI; i--; )
1897 {
1898 assert (pendingmax [i] >= pendingcnt [i]);
1899#if EV_IDLE_ENABLE
1900 assert (idleall >= 0);
1901 assert (idlemax [i] >= idlecnt [i]);
1902 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
1903#endif
1904 }
1905
1906#if EV_FORK_ENABLE
1907 assert (forkmax >= forkcnt);
1908 array_verify (EV_A_ (W *)forks, forkcnt);
1909#endif
1910
1911#if EV_ASYNC_ENABLE
1912 assert (asyncmax >= asynccnt);
1913 array_verify (EV_A_ (W *)asyncs, asynccnt);
1914#endif
1915
1916 assert (preparemax >= preparecnt);
1917 array_verify (EV_A_ (W *)prepares, preparecnt);
1918
1919 assert (checkmax >= checkcnt);
1920 array_verify (EV_A_ (W *)checks, checkcnt);
1921
1922# if 0
1923 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
1924 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
527#endif 1925# endif
528
529 ev_now = ev_time ();
530 now = get_clock ();
531 now_floor = now;
532 diff = ev_now - now;
533
534 if (pipe (sigpipe))
535 return 0;
536
537 if (methods == EVMETHOD_AUTO)
538 if (!enable_secure () && getenv ("LIBEV_METHODS"))
539 methods = atoi (getenv ("LIBEV_METHODS"));
540 else
541 methods = EVMETHOD_ANY;
542
543 ev_method = 0;
544#if EV_USE_EPOLL
545 if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);
546#endif 1926#endif
547#if EV_USE_POLL 1927}
548 if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);
549#endif 1928#endif
550#if EV_USE_SELECT
551 if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);
552#endif
553 1929
554 if (ev_method) 1930#if EV_MULTIPLICITY
1931struct ev_loop *
1932ev_default_loop_init (unsigned int flags)
1933#else
1934int
1935ev_default_loop (unsigned int flags)
1936#endif
1937{
1938 if (!ev_default_loop_ptr)
1939 {
1940#if EV_MULTIPLICITY
1941 EV_P = ev_default_loop_ptr = &default_loop_struct;
1942#else
1943 ev_default_loop_ptr = 1;
1944#endif
1945
1946 loop_init (EV_A_ flags);
1947
1948 if (ev_backend (EV_A))
555 { 1949 {
556 ev_watcher_init (&sigev, sigcb); 1950#ifndef _WIN32
557 siginit ();
558
559 ev_signal_init (&childev, childcb, SIGCHLD); 1951 ev_signal_init (&childev, childcb, SIGCHLD);
1952 ev_set_priority (&childev, EV_MAXPRI);
560 ev_signal_start (&childev); 1953 ev_signal_start (EV_A_ &childev);
1954 ev_unref (EV_A); /* child watcher should not keep loop alive */
1955#endif
561 } 1956 }
1957 else
1958 ev_default_loop_ptr = 0;
562 } 1959 }
563 1960
564 return ev_method; 1961 return ev_default_loop_ptr;
1962}
1963
1964void
1965ev_default_destroy (void)
1966{
1967#if EV_MULTIPLICITY
1968 EV_P = ev_default_loop_ptr;
1969#endif
1970
1971 ev_default_loop_ptr = 0;
1972
1973#ifndef _WIN32
1974 ev_ref (EV_A); /* child watcher */
1975 ev_signal_stop (EV_A_ &childev);
1976#endif
1977
1978 loop_destroy (EV_A);
1979}
1980
1981void
1982ev_default_fork (void)
1983{
1984#if EV_MULTIPLICITY
1985 EV_P = ev_default_loop_ptr;
1986#endif
1987
1988 postfork = 1; /* must be in line with ev_loop_fork */
565} 1989}
566 1990
567/*****************************************************************************/ 1991/*****************************************************************************/
568 1992
569void 1993void
570ev_fork_prepare (void) 1994ev_invoke (EV_P_ void *w, int revents)
571{ 1995{
572 /* nop */ 1996 EV_CB_INVOKE ((W)w, revents);
573} 1997}
574 1998
575void 1999unsigned int
576ev_fork_parent (void) 2000ev_pending_count (EV_P)
577{ 2001{
578 /* nop */ 2002 int pri;
579} 2003 unsigned int count = 0;
580 2004
581void 2005 for (pri = NUMPRI; pri--; )
582ev_fork_child (void) 2006 count += pendingcnt [pri];
583{
584#if EV_USE_EPOLL
585 if (ev_method == EVMETHOD_EPOLL)
586 epoll_postfork_child ();
587#endif
588 2007
589 ev_io_stop (&sigev); 2008 return count;
590 close (sigpipe [0]);
591 close (sigpipe [1]);
592 pipe (sigpipe);
593 siginit ();
594} 2009}
595 2010
596/*****************************************************************************/ 2011void noinline
597 2012ev_invoke_pending (EV_P)
598static void
599call_pending (void)
600{ 2013{
601 int pri; 2014 int pri;
602 2015
603 for (pri = NUMPRI; pri--; ) 2016 for (pri = NUMPRI; pri--; )
604 while (pendingcnt [pri]) 2017 while (pendingcnt [pri])
605 { 2018 {
606 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2019 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
607 2020
608 if (p->w) 2021 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2022 /* ^ this is no longer true, as pending_w could be here */
2023
2024 p->w->pending = 0;
2025 EV_CB_INVOKE (p->w, p->events);
2026 EV_FREQUENT_CHECK;
2027 }
2028}
2029
2030#if EV_IDLE_ENABLE
2031/* make idle watchers pending. this handles the "call-idle */
2032/* only when higher priorities are idle" logic */
2033inline_size void
2034idle_reify (EV_P)
2035{
2036 if (expect_false (idleall))
2037 {
2038 int pri;
2039
2040 for (pri = NUMPRI; pri--; )
2041 {
2042 if (pendingcnt [pri])
2043 break;
2044
2045 if (idlecnt [pri])
2046 {
2047 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2048 break;
2049 }
2050 }
2051 }
2052}
2053#endif
2054
2055/* make timers pending */
2056inline_size void
2057timers_reify (EV_P)
2058{
2059 EV_FREQUENT_CHECK;
2060
2061 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2062 {
2063 do
2064 {
2065 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2066
2067 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2068
2069 /* first reschedule or stop timer */
2070 if (w->repeat)
2071 {
2072 ev_at (w) += w->repeat;
2073 if (ev_at (w) < mn_now)
2074 ev_at (w) = mn_now;
2075
2076 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2077
2078 ANHE_at_cache (timers [HEAP0]);
2079 downheap (timers, timercnt, HEAP0);
2080 }
2081 else
2082 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2083
2084 EV_FREQUENT_CHECK;
2085 feed_reverse (EV_A_ (W)w);
2086 }
2087 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2088
2089 feed_reverse_done (EV_A_ EV_TIMEOUT);
2090 }
2091}
2092
2093#if EV_PERIODIC_ENABLE
2094/* make periodics pending */
2095inline_size void
2096periodics_reify (EV_P)
2097{
2098 EV_FREQUENT_CHECK;
2099
2100 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2101 {
2102 int feed_count = 0;
2103
2104 do
2105 {
2106 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2107
2108 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2109
2110 /* first reschedule or stop timer */
2111 if (w->reschedule_cb)
2112 {
2113 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2114
2115 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2116
2117 ANHE_at_cache (periodics [HEAP0]);
2118 downheap (periodics, periodiccnt, HEAP0);
2119 }
2120 else if (w->interval)
2121 {
2122 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2123 /* if next trigger time is not sufficiently in the future, put it there */
2124 /* this might happen because of floating point inexactness */
2125 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2126 {
2127 ev_at (w) += w->interval;
2128
2129 /* if interval is unreasonably low we might still have a time in the past */
2130 /* so correct this. this will make the periodic very inexact, but the user */
2131 /* has effectively asked to get triggered more often than possible */
2132 if (ev_at (w) < ev_rt_now)
2133 ev_at (w) = ev_rt_now;
2134 }
2135
2136 ANHE_at_cache (periodics [HEAP0]);
2137 downheap (periodics, periodiccnt, HEAP0);
2138 }
2139 else
2140 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2141
2142 EV_FREQUENT_CHECK;
2143 feed_reverse (EV_A_ (W)w);
2144 }
2145 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2146
2147 feed_reverse_done (EV_A_ EV_PERIODIC);
2148 }
2149}
2150
2151/* simply recalculate all periodics */
2152/* TODO: maybe ensure that at leats one event happens when jumping forward? */
2153static void noinline
2154periodics_reschedule (EV_P)
2155{
2156 int i;
2157
2158 /* adjust periodics after time jump */
2159 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2160 {
2161 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2162
2163 if (w->reschedule_cb)
2164 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2165 else if (w->interval)
2166 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2167
2168 ANHE_at_cache (periodics [i]);
2169 }
2170
2171 reheap (periodics, periodiccnt);
2172}
2173#endif
2174
2175/* adjust all timers by a given offset */
2176static void noinline
2177timers_reschedule (EV_P_ ev_tstamp adjust)
2178{
2179 int i;
2180
2181 for (i = 0; i < timercnt; ++i)
2182 {
2183 ANHE *he = timers + i + HEAP0;
2184 ANHE_w (*he)->at += adjust;
2185 ANHE_at_cache (*he);
2186 }
2187}
2188
2189/* fetch new monotonic and realtime times from the kernel */
2190/* also detect if there was a timejump, and act accordingly */
2191inline_speed void
2192time_update (EV_P_ ev_tstamp max_block)
2193{
2194#if EV_USE_MONOTONIC
2195 if (expect_true (have_monotonic))
2196 {
2197 int i;
2198 ev_tstamp odiff = rtmn_diff;
2199
2200 mn_now = get_clock ();
2201
2202 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2203 /* interpolate in the meantime */
2204 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2205 {
2206 ev_rt_now = rtmn_diff + mn_now;
2207 return;
2208 }
2209
2210 now_floor = mn_now;
2211 ev_rt_now = ev_time ();
2212
2213 /* loop a few times, before making important decisions.
2214 * on the choice of "4": one iteration isn't enough,
2215 * in case we get preempted during the calls to
2216 * ev_time and get_clock. a second call is almost guaranteed
2217 * to succeed in that case, though. and looping a few more times
2218 * doesn't hurt either as we only do this on time-jumps or
2219 * in the unlikely event of having been preempted here.
2220 */
2221 for (i = 4; --i; )
2222 {
2223 rtmn_diff = ev_rt_now - mn_now;
2224
2225 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
2226 return; /* all is well */
2227
2228 ev_rt_now = ev_time ();
2229 mn_now = get_clock ();
2230 now_floor = mn_now;
2231 }
2232
2233 /* no timer adjustment, as the monotonic clock doesn't jump */
2234 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2235# if EV_PERIODIC_ENABLE
2236 periodics_reschedule (EV_A);
2237# endif
2238 }
2239 else
2240#endif
2241 {
2242 ev_rt_now = ev_time ();
2243
2244 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2245 {
2246 /* adjust timers. this is easy, as the offset is the same for all of them */
2247 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2248#if EV_PERIODIC_ENABLE
2249 periodics_reschedule (EV_A);
2250#endif
2251 }
2252
2253 mn_now = ev_rt_now;
2254 }
2255}
2256
2257void
2258ev_loop (EV_P_ int flags)
2259{
2260#if EV_MINIMAL < 2
2261 ++loop_depth;
2262#endif
2263
2264 assert (("libev: ev_loop recursion during release detected", loop_done != EVUNLOOP_RECURSE));
2265
2266 loop_done = EVUNLOOP_CANCEL;
2267
2268 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2269
2270 do
2271 {
2272#if EV_VERIFY >= 2
2273 ev_loop_verify (EV_A);
2274#endif
2275
2276#ifndef _WIN32
2277 if (expect_false (curpid)) /* penalise the forking check even more */
2278 if (expect_false (getpid () != curpid))
609 { 2279 {
610 p->w->pending = 0; 2280 curpid = getpid ();
611 p->w->cb (p->w, p->events); 2281 postfork = 1;
612 } 2282 }
2283#endif
2284
2285#if EV_FORK_ENABLE
2286 /* we might have forked, so queue fork handlers */
2287 if (expect_false (postfork))
2288 if (forkcnt)
2289 {
2290 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2291 EV_INVOKE_PENDING;
2292 }
2293#endif
2294
2295 /* queue prepare watchers (and execute them) */
2296 if (expect_false (preparecnt))
2297 {
2298 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2299 EV_INVOKE_PENDING;
2300 }
2301
2302 if (expect_false (loop_done))
2303 break;
2304
2305 /* we might have forked, so reify kernel state if necessary */
2306 if (expect_false (postfork))
2307 loop_fork (EV_A);
2308
2309 /* update fd-related kernel structures */
2310 fd_reify (EV_A);
2311
2312 /* calculate blocking time */
2313 {
2314 ev_tstamp waittime = 0.;
2315 ev_tstamp sleeptime = 0.;
2316
2317 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt)))
2318 {
2319 /* remember old timestamp for io_blocktime calculation */
2320 ev_tstamp prev_mn_now = mn_now;
2321
2322 /* update time to cancel out callback processing overhead */
2323 time_update (EV_A_ 1e100);
2324
2325 waittime = MAX_BLOCKTIME;
2326
2327 if (timercnt)
2328 {
2329 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
2330 if (waittime > to) waittime = to;
2331 }
2332
2333#if EV_PERIODIC_ENABLE
2334 if (periodiccnt)
2335 {
2336 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
2337 if (waittime > to) waittime = to;
2338 }
2339#endif
2340
2341 /* don't let timeouts decrease the waittime below timeout_blocktime */
2342 if (expect_false (waittime < timeout_blocktime))
2343 waittime = timeout_blocktime;
2344
2345 /* extra check because io_blocktime is commonly 0 */
2346 if (expect_false (io_blocktime))
2347 {
2348 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2349
2350 if (sleeptime > waittime - backend_fudge)
2351 sleeptime = waittime - backend_fudge;
2352
2353 if (expect_true (sleeptime > 0.))
2354 {
2355 ev_sleep (sleeptime);
2356 waittime -= sleeptime;
2357 }
2358 }
2359 }
2360
2361#if EV_MINIMAL < 2
2362 ++loop_count;
2363#endif
2364 assert ((loop_done = EVUNLOOP_RECURSE, 1)); /* assert for side effect */
2365 backend_poll (EV_A_ waittime);
2366 assert ((loop_done = EVUNLOOP_CANCEL, 1)); /* assert for side effect */
2367
2368 /* update ev_rt_now, do magic */
2369 time_update (EV_A_ waittime + sleeptime);
613 } 2370 }
614}
615 2371
616static void 2372 /* queue pending timers and reschedule them */
617timers_reify (void) 2373 timers_reify (EV_A); /* relative timers called last */
2374#if EV_PERIODIC_ENABLE
2375 periodics_reify (EV_A); /* absolute timers called first */
2376#endif
2377
2378#if EV_IDLE_ENABLE
2379 /* queue idle watchers unless other events are pending */
2380 idle_reify (EV_A);
2381#endif
2382
2383 /* queue check watchers, to be executed first */
2384 if (expect_false (checkcnt))
2385 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2386
2387 EV_INVOKE_PENDING;
2388 }
2389 while (expect_true (
2390 activecnt
2391 && !loop_done
2392 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK))
2393 ));
2394
2395 if (loop_done == EVUNLOOP_ONE)
2396 loop_done = EVUNLOOP_CANCEL;
2397
2398#if EV_MINIMAL < 2
2399 --loop_depth;
2400#endif
2401}
2402
2403void
2404ev_unloop (EV_P_ int how)
618{ 2405{
619 while (timercnt && timers [0]->at <= now) 2406 loop_done = how;
2407}
2408
2409void
2410ev_ref (EV_P)
2411{
2412 ++activecnt;
2413}
2414
2415void
2416ev_unref (EV_P)
2417{
2418 --activecnt;
2419}
2420
2421void
2422ev_now_update (EV_P)
2423{
2424 time_update (EV_A_ 1e100);
2425}
2426
2427void
2428ev_suspend (EV_P)
2429{
2430 ev_now_update (EV_A);
2431}
2432
2433void
2434ev_resume (EV_P)
2435{
2436 ev_tstamp mn_prev = mn_now;
2437
2438 ev_now_update (EV_A);
2439 timers_reschedule (EV_A_ mn_now - mn_prev);
2440#if EV_PERIODIC_ENABLE
2441 /* TODO: really do this? */
2442 periodics_reschedule (EV_A);
2443#endif
2444}
2445
2446/*****************************************************************************/
2447/* singly-linked list management, used when the expected list length is short */
2448
2449inline_size void
2450wlist_add (WL *head, WL elem)
2451{
2452 elem->next = *head;
2453 *head = elem;
2454}
2455
2456inline_size void
2457wlist_del (WL *head, WL elem)
2458{
2459 while (*head)
2460 {
2461 if (expect_true (*head == elem))
2462 {
2463 *head = elem->next;
2464 break;
2465 }
2466
2467 head = &(*head)->next;
2468 }
2469}
2470
2471/* internal, faster, version of ev_clear_pending */
2472inline_speed void
2473clear_pending (EV_P_ W w)
2474{
2475 if (w->pending)
2476 {
2477 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2478 w->pending = 0;
2479 }
2480}
2481
2482int
2483ev_clear_pending (EV_P_ void *w)
2484{
2485 W w_ = (W)w;
2486 int pending = w_->pending;
2487
2488 if (expect_true (pending))
2489 {
2490 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2491 p->w = (W)&pending_w;
2492 w_->pending = 0;
2493 return p->events;
2494 }
2495 else
2496 return 0;
2497}
2498
2499inline_size void
2500pri_adjust (EV_P_ W w)
2501{
2502 int pri = ev_priority (w);
2503 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2504 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2505 ev_set_priority (w, pri);
2506}
2507
2508inline_speed void
2509ev_start (EV_P_ W w, int active)
2510{
2511 pri_adjust (EV_A_ w);
2512 w->active = active;
2513 ev_ref (EV_A);
2514}
2515
2516inline_size void
2517ev_stop (EV_P_ W w)
2518{
2519 ev_unref (EV_A);
2520 w->active = 0;
2521}
2522
2523/*****************************************************************************/
2524
2525void noinline
2526ev_io_start (EV_P_ ev_io *w)
2527{
2528 int fd = w->fd;
2529
2530 if (expect_false (ev_is_active (w)))
2531 return;
2532
2533 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2534 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2535
2536 EV_FREQUENT_CHECK;
2537
2538 ev_start (EV_A_ (W)w, 1);
2539 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2540 wlist_add (&anfds[fd].head, (WL)w);
2541
2542 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2543 w->events &= ~EV__IOFDSET;
2544
2545 EV_FREQUENT_CHECK;
2546}
2547
2548void noinline
2549ev_io_stop (EV_P_ ev_io *w)
2550{
2551 clear_pending (EV_A_ (W)w);
2552 if (expect_false (!ev_is_active (w)))
2553 return;
2554
2555 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2556
2557 EV_FREQUENT_CHECK;
2558
2559 wlist_del (&anfds[w->fd].head, (WL)w);
2560 ev_stop (EV_A_ (W)w);
2561
2562 fd_change (EV_A_ w->fd, 1);
2563
2564 EV_FREQUENT_CHECK;
2565}
2566
2567void noinline
2568ev_timer_start (EV_P_ ev_timer *w)
2569{
2570 if (expect_false (ev_is_active (w)))
2571 return;
2572
2573 ev_at (w) += mn_now;
2574
2575 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2576
2577 EV_FREQUENT_CHECK;
2578
2579 ++timercnt;
2580 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2581 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2582 ANHE_w (timers [ev_active (w)]) = (WT)w;
2583 ANHE_at_cache (timers [ev_active (w)]);
2584 upheap (timers, ev_active (w));
2585
2586 EV_FREQUENT_CHECK;
2587
2588 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2589}
2590
2591void noinline
2592ev_timer_stop (EV_P_ ev_timer *w)
2593{
2594 clear_pending (EV_A_ (W)w);
2595 if (expect_false (!ev_is_active (w)))
2596 return;
2597
2598 EV_FREQUENT_CHECK;
2599
2600 {
2601 int active = ev_active (w);
2602
2603 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2604
2605 --timercnt;
2606
2607 if (expect_true (active < timercnt + HEAP0))
620 { 2608 {
621 struct ev_timer *w = timers [0]; 2609 timers [active] = timers [timercnt + HEAP0];
2610 adjustheap (timers, timercnt, active);
2611 }
2612 }
622 2613
623 /* first reschedule or stop timer */ 2614 ev_at (w) -= mn_now;
2615
2616 ev_stop (EV_A_ (W)w);
2617
2618 EV_FREQUENT_CHECK;
2619}
2620
2621void noinline
2622ev_timer_again (EV_P_ ev_timer *w)
2623{
2624 EV_FREQUENT_CHECK;
2625
2626 if (ev_is_active (w))
2627 {
624 if (w->repeat) 2628 if (w->repeat)
625 { 2629 {
626 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
627 w->at = now + w->repeat; 2630 ev_at (w) = mn_now + w->repeat;
628 downheap ((WT *)timers, timercnt, 0); 2631 ANHE_at_cache (timers [ev_active (w)]);
2632 adjustheap (timers, timercnt, ev_active (w));
629 } 2633 }
630 else 2634 else
631 ev_timer_stop (w); /* nonrepeating: stop timer */ 2635 ev_timer_stop (EV_A_ w);
632
633 event ((W)w, EV_TIMEOUT);
634 }
635}
636
637static void
638periodics_reify (void)
639{
640 while (periodiccnt && periodics [0]->at <= ev_now)
641 { 2636 }
642 struct ev_periodic *w = periodics [0]; 2637 else if (w->repeat)
2638 {
2639 ev_at (w) = w->repeat;
2640 ev_timer_start (EV_A_ w);
2641 }
643 2642
644 /* first reschedule or stop timer */ 2643 EV_FREQUENT_CHECK;
2644}
2645
2646ev_tstamp
2647ev_timer_remaining (EV_P_ ev_timer *w)
2648{
2649 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2650}
2651
2652#if EV_PERIODIC_ENABLE
2653void noinline
2654ev_periodic_start (EV_P_ ev_periodic *w)
2655{
2656 if (expect_false (ev_is_active (w)))
2657 return;
2658
2659 if (w->reschedule_cb)
2660 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
645 if (w->interval) 2661 else if (w->interval)
2662 {
2663 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2664 /* this formula differs from the one in periodic_reify because we do not always round up */
2665 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2666 }
2667 else
2668 ev_at (w) = w->offset;
2669
2670 EV_FREQUENT_CHECK;
2671
2672 ++periodiccnt;
2673 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2674 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2675 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2676 ANHE_at_cache (periodics [ev_active (w)]);
2677 upheap (periodics, ev_active (w));
2678
2679 EV_FREQUENT_CHECK;
2680
2681 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2682}
2683
2684void noinline
2685ev_periodic_stop (EV_P_ ev_periodic *w)
2686{
2687 clear_pending (EV_A_ (W)w);
2688 if (expect_false (!ev_is_active (w)))
2689 return;
2690
2691 EV_FREQUENT_CHECK;
2692
2693 {
2694 int active = ev_active (w);
2695
2696 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2697
2698 --periodiccnt;
2699
2700 if (expect_true (active < periodiccnt + HEAP0))
2701 {
2702 periodics [active] = periodics [periodiccnt + HEAP0];
2703 adjustheap (periodics, periodiccnt, active);
2704 }
2705 }
2706
2707 ev_stop (EV_A_ (W)w);
2708
2709 EV_FREQUENT_CHECK;
2710}
2711
2712void noinline
2713ev_periodic_again (EV_P_ ev_periodic *w)
2714{
2715 /* TODO: use adjustheap and recalculation */
2716 ev_periodic_stop (EV_A_ w);
2717 ev_periodic_start (EV_A_ w);
2718}
2719#endif
2720
2721#ifndef SA_RESTART
2722# define SA_RESTART 0
2723#endif
2724
2725void noinline
2726ev_signal_start (EV_P_ ev_signal *w)
2727{
2728 if (expect_false (ev_is_active (w)))
2729 return;
2730
2731 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2732
2733#if EV_MULTIPLICITY
2734 assert (("libev: a signal must not be attached to two different loops",
2735 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2736
2737 signals [w->signum - 1].loop = EV_A;
2738#endif
2739
2740 EV_FREQUENT_CHECK;
2741
2742#if EV_USE_SIGNALFD
2743 if (sigfd == -2)
2744 {
2745 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2746 if (sigfd < 0 && errno == EINVAL)
2747 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2748
2749 if (sigfd >= 0)
646 { 2750 {
647 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 2751 fd_intern (sigfd); /* doing it twice will not hurt */
648 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); 2752
649 downheap ((WT *)periodics, periodiccnt, 0); 2753 sigemptyset (&sigfd_set);
2754
2755 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
2756 ev_set_priority (&sigfd_w, EV_MAXPRI);
2757 ev_io_start (EV_A_ &sigfd_w);
2758 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
2759 }
2760 }
2761
2762 if (sigfd >= 0)
2763 {
2764 /* TODO: check .head */
2765 sigaddset (&sigfd_set, w->signum);
2766 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
2767
2768 signalfd (sigfd, &sigfd_set, 0);
2769 }
2770#endif
2771
2772 ev_start (EV_A_ (W)w, 1);
2773 wlist_add (&signals [w->signum - 1].head, (WL)w);
2774
2775 if (!((WL)w)->next)
2776# if EV_USE_SIGNALFD
2777 if (sigfd < 0) /*TODO*/
2778# endif
2779 {
2780# ifdef _WIN32
2781 evpipe_init (EV_A);
2782
2783 signal (w->signum, ev_sighandler);
2784# else
2785 struct sigaction sa;
2786
2787 evpipe_init (EV_A);
2788
2789 sa.sa_handler = ev_sighandler;
2790 sigfillset (&sa.sa_mask);
2791 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2792 sigaction (w->signum, &sa, 0);
2793
2794 sigemptyset (&sa.sa_mask);
2795 sigaddset (&sa.sa_mask, w->signum);
2796 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
2797#endif
2798 }
2799
2800 EV_FREQUENT_CHECK;
2801}
2802
2803void noinline
2804ev_signal_stop (EV_P_ ev_signal *w)
2805{
2806 clear_pending (EV_A_ (W)w);
2807 if (expect_false (!ev_is_active (w)))
2808 return;
2809
2810 EV_FREQUENT_CHECK;
2811
2812 wlist_del (&signals [w->signum - 1].head, (WL)w);
2813 ev_stop (EV_A_ (W)w);
2814
2815 if (!signals [w->signum - 1].head)
2816 {
2817#if EV_MULTIPLICITY
2818 signals [w->signum - 1].loop = 0; /* unattach from signal */
2819#endif
2820#if EV_USE_SIGNALFD
2821 if (sigfd >= 0)
2822 {
2823 sigset_t ss;
2824
2825 sigemptyset (&ss);
2826 sigaddset (&ss, w->signum);
2827 sigdelset (&sigfd_set, w->signum);
2828
2829 signalfd (sigfd, &sigfd_set, 0);
2830 sigprocmask (SIG_UNBLOCK, &ss, 0);
650 } 2831 }
651 else 2832 else
652 ev_periodic_stop (w); /* nonrepeating: stop timer */ 2833#endif
653 2834 signal (w->signum, SIG_DFL);
654 event ((W)w, EV_PERIODIC);
655 }
656}
657
658static void
659periodics_reschedule (ev_tstamp diff)
660{
661 int i;
662
663 /* adjust periodics after time jump */
664 for (i = 0; i < periodiccnt; ++i)
665 { 2835 }
666 struct ev_periodic *w = periodics [i];
667 2836
668 if (w->interval) 2837 EV_FREQUENT_CHECK;
2838}
2839
2840void
2841ev_child_start (EV_P_ ev_child *w)
2842{
2843#if EV_MULTIPLICITY
2844 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2845#endif
2846 if (expect_false (ev_is_active (w)))
2847 return;
2848
2849 EV_FREQUENT_CHECK;
2850
2851 ev_start (EV_A_ (W)w, 1);
2852 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2853
2854 EV_FREQUENT_CHECK;
2855}
2856
2857void
2858ev_child_stop (EV_P_ ev_child *w)
2859{
2860 clear_pending (EV_A_ (W)w);
2861 if (expect_false (!ev_is_active (w)))
2862 return;
2863
2864 EV_FREQUENT_CHECK;
2865
2866 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
2867 ev_stop (EV_A_ (W)w);
2868
2869 EV_FREQUENT_CHECK;
2870}
2871
2872#if EV_STAT_ENABLE
2873
2874# ifdef _WIN32
2875# undef lstat
2876# define lstat(a,b) _stati64 (a,b)
2877# endif
2878
2879#define DEF_STAT_INTERVAL 5.0074891
2880#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2881#define MIN_STAT_INTERVAL 0.1074891
2882
2883static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2884
2885#if EV_USE_INOTIFY
2886
2887/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2888# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2889
2890static void noinline
2891infy_add (EV_P_ ev_stat *w)
2892{
2893 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
2894
2895 if (w->wd >= 0)
2896 {
2897 struct statfs sfs;
2898
2899 /* now local changes will be tracked by inotify, but remote changes won't */
2900 /* unless the filesystem is known to be local, we therefore still poll */
2901 /* also do poll on <2.6.25, but with normal frequency */
2902
2903 if (!fs_2625)
2904 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2905 else if (!statfs (w->path, &sfs)
2906 && (sfs.f_type == 0x1373 /* devfs */
2907 || sfs.f_type == 0xEF53 /* ext2/3 */
2908 || sfs.f_type == 0x3153464a /* jfs */
2909 || sfs.f_type == 0x52654973 /* reiser3 */
2910 || sfs.f_type == 0x01021994 /* tempfs */
2911 || sfs.f_type == 0x58465342 /* xfs */))
2912 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2913 else
2914 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2915 }
2916 else
2917 {
2918 /* can't use inotify, continue to stat */
2919 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2920
2921 /* if path is not there, monitor some parent directory for speedup hints */
2922 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2923 /* but an efficiency issue only */
2924 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
669 { 2925 {
670 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 2926 char path [4096];
2927 strcpy (path, w->path);
671 2928
672 if (fabs (diff) >= 1e-4) 2929 do
673 { 2930 {
674 ev_periodic_stop (w); 2931 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
675 ev_periodic_start (w); 2932 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
676 2933
677 i = 0; /* restart loop, inefficient, but time jumps should be rare */ 2934 char *pend = strrchr (path, '/');
2935
2936 if (!pend || pend == path)
2937 break;
2938
2939 *pend = 0;
2940 w->wd = inotify_add_watch (fs_fd, path, mask);
2941 }
2942 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2943 }
2944 }
2945
2946 if (w->wd >= 0)
2947 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2948
2949 /* now re-arm timer, if required */
2950 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2951 ev_timer_again (EV_A_ &w->timer);
2952 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2953}
2954
2955static void noinline
2956infy_del (EV_P_ ev_stat *w)
2957{
2958 int slot;
2959 int wd = w->wd;
2960
2961 if (wd < 0)
2962 return;
2963
2964 w->wd = -2;
2965 slot = wd & (EV_INOTIFY_HASHSIZE - 1);
2966 wlist_del (&fs_hash [slot].head, (WL)w);
2967
2968 /* remove this watcher, if others are watching it, they will rearm */
2969 inotify_rm_watch (fs_fd, wd);
2970}
2971
2972static void noinline
2973infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2974{
2975 if (slot < 0)
2976 /* overflow, need to check for all hash slots */
2977 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
2978 infy_wd (EV_A_ slot, wd, ev);
2979 else
2980 {
2981 WL w_;
2982
2983 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
2984 {
2985 ev_stat *w = (ev_stat *)w_;
2986 w_ = w_->next; /* lets us remove this watcher and all before it */
2987
2988 if (w->wd == wd || wd == -1)
2989 {
2990 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2991 {
2992 wlist_del (&fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
2993 w->wd = -1;
2994 infy_add (EV_A_ w); /* re-add, no matter what */
2995 }
2996
2997 stat_timer_cb (EV_A_ &w->timer, 0);
678 } 2998 }
679 } 2999 }
680 } 3000 }
681} 3001}
682 3002
683static int 3003static void
684time_update_monotonic (void) 3004infy_cb (EV_P_ ev_io *w, int revents)
685{ 3005{
686 now = get_clock (); 3006 char buf [EV_INOTIFY_BUFSIZE];
3007 int ofs;
3008 int len = read (fs_fd, buf, sizeof (buf));
687 3009
688 if (expect_true (now - now_floor < MIN_TIMEJUMP * .5)) 3010 for (ofs = 0; ofs < len; )
3011 {
3012 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3013 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3014 ofs += sizeof (struct inotify_event) + ev->len;
689 { 3015 }
690 ev_now = now + diff; 3016}
3017
3018inline_size unsigned int
3019ev_linux_version (void)
3020{
3021 struct utsname buf;
3022 unsigned int v;
3023 int i;
3024 char *p = buf.release;
3025
3026 if (uname (&buf))
691 return 0; 3027 return 0;
3028
3029 for (i = 3+1; --i; )
692 } 3030 {
3031 unsigned int c = 0;
3032
3033 for (;;)
3034 {
3035 if (*p >= '0' && *p <= '9')
3036 c = c * 10 + *p++ - '0';
3037 else
3038 {
3039 p += *p == '.';
3040 break;
3041 }
3042 }
3043
3044 v = (v << 8) | c;
3045 }
3046
3047 return v;
3048}
3049
3050inline_size void
3051ev_check_2625 (EV_P)
3052{
3053 /* kernels < 2.6.25 are borked
3054 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3055 */
3056 if (ev_linux_version () < 0x020619)
3057 return;
3058
3059 fs_2625 = 1;
3060}
3061
3062inline_size int
3063infy_newfd (void)
3064{
3065#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3066 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3067 if (fd >= 0)
3068 return fd;
3069#endif
3070 return inotify_init ();
3071}
3072
3073inline_size void
3074infy_init (EV_P)
3075{
3076 if (fs_fd != -2)
3077 return;
3078
3079 fs_fd = -1;
3080
3081 ev_check_2625 (EV_A);
3082
3083 fs_fd = infy_newfd ();
3084
3085 if (fs_fd >= 0)
3086 {
3087 fd_intern (fs_fd);
3088 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3089 ev_set_priority (&fs_w, EV_MAXPRI);
3090 ev_io_start (EV_A_ &fs_w);
3091 ev_unref (EV_A);
3092 }
3093}
3094
3095inline_size void
3096infy_fork (EV_P)
3097{
3098 int slot;
3099
3100 if (fs_fd < 0)
3101 return;
3102
3103 ev_ref (EV_A);
3104 ev_io_stop (EV_A_ &fs_w);
3105 close (fs_fd);
3106 fs_fd = infy_newfd ();
3107
3108 if (fs_fd >= 0)
3109 {
3110 fd_intern (fs_fd);
3111 ev_io_set (&fs_w, fs_fd, EV_READ);
3112 ev_io_start (EV_A_ &fs_w);
3113 ev_unref (EV_A);
3114 }
3115
3116 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
3117 {
3118 WL w_ = fs_hash [slot].head;
3119 fs_hash [slot].head = 0;
3120
3121 while (w_)
3122 {
3123 ev_stat *w = (ev_stat *)w_;
3124 w_ = w_->next; /* lets us add this watcher */
3125
3126 w->wd = -1;
3127
3128 if (fs_fd >= 0)
3129 infy_add (EV_A_ w); /* re-add, no matter what */
3130 else
3131 {
3132 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3133 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3134 ev_timer_again (EV_A_ &w->timer);
3135 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3136 }
3137 }
3138 }
3139}
3140
3141#endif
3142
3143#ifdef _WIN32
3144# define EV_LSTAT(p,b) _stati64 (p, b)
3145#else
3146# define EV_LSTAT(p,b) lstat (p, b)
3147#endif
3148
3149void
3150ev_stat_stat (EV_P_ ev_stat *w)
3151{
3152 if (lstat (w->path, &w->attr) < 0)
3153 w->attr.st_nlink = 0;
3154 else if (!w->attr.st_nlink)
3155 w->attr.st_nlink = 1;
3156}
3157
3158static void noinline
3159stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3160{
3161 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3162
3163 ev_statdata prev = w->attr;
3164 ev_stat_stat (EV_A_ w);
3165
3166 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3167 if (
3168 prev.st_dev != w->attr.st_dev
3169 || prev.st_ino != w->attr.st_ino
3170 || prev.st_mode != w->attr.st_mode
3171 || prev.st_nlink != w->attr.st_nlink
3172 || prev.st_uid != w->attr.st_uid
3173 || prev.st_gid != w->attr.st_gid
3174 || prev.st_rdev != w->attr.st_rdev
3175 || prev.st_size != w->attr.st_size
3176 || prev.st_atime != w->attr.st_atime
3177 || prev.st_mtime != w->attr.st_mtime
3178 || prev.st_ctime != w->attr.st_ctime
3179 ) {
3180 /* we only update w->prev on actual differences */
3181 /* in case we test more often than invoke the callback, */
3182 /* to ensure that prev is always different to attr */
3183 w->prev = prev;
3184
3185 #if EV_USE_INOTIFY
3186 if (fs_fd >= 0)
3187 {
3188 infy_del (EV_A_ w);
3189 infy_add (EV_A_ w);
3190 ev_stat_stat (EV_A_ w); /* avoid race... */
3191 }
3192 #endif
3193
3194 ev_feed_event (EV_A_ w, EV_STAT);
3195 }
3196}
3197
3198void
3199ev_stat_start (EV_P_ ev_stat *w)
3200{
3201 if (expect_false (ev_is_active (w)))
3202 return;
3203
3204 ev_stat_stat (EV_A_ w);
3205
3206 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3207 w->interval = MIN_STAT_INTERVAL;
3208
3209 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3210 ev_set_priority (&w->timer, ev_priority (w));
3211
3212#if EV_USE_INOTIFY
3213 infy_init (EV_A);
3214
3215 if (fs_fd >= 0)
3216 infy_add (EV_A_ w);
693 else 3217 else
3218#endif
3219 {
3220 ev_timer_again (EV_A_ &w->timer);
3221 ev_unref (EV_A);
694 { 3222 }
695 now_floor = now; 3223
696 ev_now = ev_time (); 3224 ev_start (EV_A_ (W)w, 1);
3225
3226 EV_FREQUENT_CHECK;
3227}
3228
3229void
3230ev_stat_stop (EV_P_ ev_stat *w)
3231{
3232 clear_pending (EV_A_ (W)w);
3233 if (expect_false (!ev_is_active (w)))
697 return 1; 3234 return;
3235
3236 EV_FREQUENT_CHECK;
3237
3238#if EV_USE_INOTIFY
3239 infy_del (EV_A_ w);
3240#endif
3241
3242 if (ev_is_active (&w->timer))
698 } 3243 {
3244 ev_ref (EV_A);
3245 ev_timer_stop (EV_A_ &w->timer);
3246 }
3247
3248 ev_stop (EV_A_ (W)w);
3249
3250 EV_FREQUENT_CHECK;
3251}
3252#endif
3253
3254#if EV_IDLE_ENABLE
3255void
3256ev_idle_start (EV_P_ ev_idle *w)
3257{
3258 if (expect_false (ev_is_active (w)))
3259 return;
3260
3261 pri_adjust (EV_A_ (W)w);
3262
3263 EV_FREQUENT_CHECK;
3264
3265 {
3266 int active = ++idlecnt [ABSPRI (w)];
3267
3268 ++idleall;
3269 ev_start (EV_A_ (W)w, active);
3270
3271 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3272 idles [ABSPRI (w)][active - 1] = w;
3273 }
3274
3275 EV_FREQUENT_CHECK;
3276}
3277
3278void
3279ev_idle_stop (EV_P_ ev_idle *w)
3280{
3281 clear_pending (EV_A_ (W)w);
3282 if (expect_false (!ev_is_active (w)))
3283 return;
3284
3285 EV_FREQUENT_CHECK;
3286
3287 {
3288 int active = ev_active (w);
3289
3290 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3291 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3292
3293 ev_stop (EV_A_ (W)w);
3294 --idleall;
3295 }
3296
3297 EV_FREQUENT_CHECK;
3298}
3299#endif
3300
3301void
3302ev_prepare_start (EV_P_ ev_prepare *w)
3303{
3304 if (expect_false (ev_is_active (w)))
3305 return;
3306
3307 EV_FREQUENT_CHECK;
3308
3309 ev_start (EV_A_ (W)w, ++preparecnt);
3310 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3311 prepares [preparecnt - 1] = w;
3312
3313 EV_FREQUENT_CHECK;
3314}
3315
3316void
3317ev_prepare_stop (EV_P_ ev_prepare *w)
3318{
3319 clear_pending (EV_A_ (W)w);
3320 if (expect_false (!ev_is_active (w)))
3321 return;
3322
3323 EV_FREQUENT_CHECK;
3324
3325 {
3326 int active = ev_active (w);
3327
3328 prepares [active - 1] = prepares [--preparecnt];
3329 ev_active (prepares [active - 1]) = active;
3330 }
3331
3332 ev_stop (EV_A_ (W)w);
3333
3334 EV_FREQUENT_CHECK;
3335}
3336
3337void
3338ev_check_start (EV_P_ ev_check *w)
3339{
3340 if (expect_false (ev_is_active (w)))
3341 return;
3342
3343 EV_FREQUENT_CHECK;
3344
3345 ev_start (EV_A_ (W)w, ++checkcnt);
3346 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3347 checks [checkcnt - 1] = w;
3348
3349 EV_FREQUENT_CHECK;
3350}
3351
3352void
3353ev_check_stop (EV_P_ ev_check *w)
3354{
3355 clear_pending (EV_A_ (W)w);
3356 if (expect_false (!ev_is_active (w)))
3357 return;
3358
3359 EV_FREQUENT_CHECK;
3360
3361 {
3362 int active = ev_active (w);
3363
3364 checks [active - 1] = checks [--checkcnt];
3365 ev_active (checks [active - 1]) = active;
3366 }
3367
3368 ev_stop (EV_A_ (W)w);
3369
3370 EV_FREQUENT_CHECK;
3371}
3372
3373#if EV_EMBED_ENABLE
3374void noinline
3375ev_embed_sweep (EV_P_ ev_embed *w)
3376{
3377 ev_loop (w->other, EVLOOP_NONBLOCK);
699} 3378}
700 3379
701static void 3380static void
702time_update (void) 3381embed_io_cb (EV_P_ ev_io *io, int revents)
703{ 3382{
704 int i; 3383 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
705 3384
706#if EV_USE_MONOTONIC 3385 if (ev_cb (w))
707 if (expect_true (have_monotonic)) 3386 ev_feed_event (EV_A_ (W)w, EV_EMBED);
708 {
709 if (time_update_monotonic ())
710 {
711 ev_tstamp odiff = diff;
712
713 for (i = 4; --i; ) /* loop a few times, before making important decisions */
714 {
715 diff = ev_now - now;
716
717 if (fabs (odiff - diff) < MIN_TIMEJUMP)
718 return; /* all is well */
719
720 ev_now = ev_time ();
721 now = get_clock ();
722 now_floor = now;
723 }
724
725 periodics_reschedule (diff - odiff);
726 /* no timer adjustment, as the monotonic clock doesn't jump */
727 }
728 }
729 else 3387 else
730#endif 3388 ev_loop (w->other, EVLOOP_NONBLOCK);
3389}
3390
3391static void
3392embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3393{
3394 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3395
731 { 3396 {
732 ev_now = ev_time (); 3397 EV_P = w->other;
733 3398
734 if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 3399 while (fdchangecnt)
735 { 3400 {
736 periodics_reschedule (ev_now - now); 3401 fd_reify (EV_A);
737 3402 ev_loop (EV_A_ EVLOOP_NONBLOCK);
738 /* adjust timers. this is easy, as the offset is the same for all */
739 for (i = 0; i < timercnt; ++i)
740 timers [i]->at += diff;
741 } 3403 }
742
743 now = ev_now;
744 } 3404 }
745} 3405}
746 3406
747int ev_loop_done; 3407static void
748 3408embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
749void ev_loop (int flags)
750{ 3409{
751 double block; 3410 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
752 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
753 3411
754 do 3412 ev_embed_stop (EV_A_ w);
3413
755 { 3414 {
756 /* queue check watchers (and execute them) */ 3415 EV_P = w->other;
757 if (expect_false (preparecnt))
758 {
759 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
760 call_pending ();
761 }
762 3416
763 /* update fd-related kernel structures */ 3417 ev_loop_fork (EV_A);
764 fd_reify (); 3418 ev_loop (EV_A_ EVLOOP_NONBLOCK);
765
766 /* calculate blocking time */
767
768 /* we only need this for !monotonic clockor timers, but as we basically
769 always have timers, we just calculate it always */
770#if EV_USE_MONOTONIC
771 if (expect_true (have_monotonic))
772 time_update_monotonic ();
773 else
774#endif
775 {
776 ev_now = ev_time ();
777 now = ev_now;
778 }
779
780 if (flags & EVLOOP_NONBLOCK || idlecnt)
781 block = 0.;
782 else
783 {
784 block = MAX_BLOCKTIME;
785
786 if (timercnt)
787 {
788 ev_tstamp to = timers [0]->at - now + method_fudge;
789 if (block > to) block = to;
790 }
791
792 if (periodiccnt)
793 {
794 ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
795 if (block > to) block = to;
796 }
797
798 if (block < 0.) block = 0.;
799 }
800
801 method_poll (block);
802
803 /* update ev_now, do magic */
804 time_update ();
805
806 /* queue pending timers and reschedule them */
807 timers_reify (); /* relative timers called last */
808 periodics_reify (); /* absolute timers called first */
809
810 /* queue idle watchers unless io or timers are pending */
811 if (!pendingcnt)
812 queue_events ((W *)idles, idlecnt, EV_IDLE);
813
814 /* queue check watchers, to be executed first */
815 if (checkcnt)
816 queue_events ((W *)checks, checkcnt, EV_CHECK);
817
818 call_pending ();
819 } 3419 }
820 while (!ev_loop_done);
821 3420
822 if (ev_loop_done != 2) 3421 ev_embed_start (EV_A_ w);
823 ev_loop_done = 0;
824} 3422}
3423
3424#if 0
3425static void
3426embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3427{
3428 ev_idle_stop (EV_A_ idle);
3429}
3430#endif
3431
3432void
3433ev_embed_start (EV_P_ ev_embed *w)
3434{
3435 if (expect_false (ev_is_active (w)))
3436 return;
3437
3438 {
3439 EV_P = w->other;
3440 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3441 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3442 }
3443
3444 EV_FREQUENT_CHECK;
3445
3446 ev_set_priority (&w->io, ev_priority (w));
3447 ev_io_start (EV_A_ &w->io);
3448
3449 ev_prepare_init (&w->prepare, embed_prepare_cb);
3450 ev_set_priority (&w->prepare, EV_MINPRI);
3451 ev_prepare_start (EV_A_ &w->prepare);
3452
3453 ev_fork_init (&w->fork, embed_fork_cb);
3454 ev_fork_start (EV_A_ &w->fork);
3455
3456 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3457
3458 ev_start (EV_A_ (W)w, 1);
3459
3460 EV_FREQUENT_CHECK;
3461}
3462
3463void
3464ev_embed_stop (EV_P_ ev_embed *w)
3465{
3466 clear_pending (EV_A_ (W)w);
3467 if (expect_false (!ev_is_active (w)))
3468 return;
3469
3470 EV_FREQUENT_CHECK;
3471
3472 ev_io_stop (EV_A_ &w->io);
3473 ev_prepare_stop (EV_A_ &w->prepare);
3474 ev_fork_stop (EV_A_ &w->fork);
3475
3476 ev_stop (EV_A_ (W)w);
3477
3478 EV_FREQUENT_CHECK;
3479}
3480#endif
3481
3482#if EV_FORK_ENABLE
3483void
3484ev_fork_start (EV_P_ ev_fork *w)
3485{
3486 if (expect_false (ev_is_active (w)))
3487 return;
3488
3489 EV_FREQUENT_CHECK;
3490
3491 ev_start (EV_A_ (W)w, ++forkcnt);
3492 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3493 forks [forkcnt - 1] = w;
3494
3495 EV_FREQUENT_CHECK;
3496}
3497
3498void
3499ev_fork_stop (EV_P_ ev_fork *w)
3500{
3501 clear_pending (EV_A_ (W)w);
3502 if (expect_false (!ev_is_active (w)))
3503 return;
3504
3505 EV_FREQUENT_CHECK;
3506
3507 {
3508 int active = ev_active (w);
3509
3510 forks [active - 1] = forks [--forkcnt];
3511 ev_active (forks [active - 1]) = active;
3512 }
3513
3514 ev_stop (EV_A_ (W)w);
3515
3516 EV_FREQUENT_CHECK;
3517}
3518#endif
3519
3520#if EV_ASYNC_ENABLE
3521void
3522ev_async_start (EV_P_ ev_async *w)
3523{
3524 if (expect_false (ev_is_active (w)))
3525 return;
3526
3527 evpipe_init (EV_A);
3528
3529 EV_FREQUENT_CHECK;
3530
3531 ev_start (EV_A_ (W)w, ++asynccnt);
3532 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3533 asyncs [asynccnt - 1] = w;
3534
3535 EV_FREQUENT_CHECK;
3536}
3537
3538void
3539ev_async_stop (EV_P_ ev_async *w)
3540{
3541 clear_pending (EV_A_ (W)w);
3542 if (expect_false (!ev_is_active (w)))
3543 return;
3544
3545 EV_FREQUENT_CHECK;
3546
3547 {
3548 int active = ev_active (w);
3549
3550 asyncs [active - 1] = asyncs [--asynccnt];
3551 ev_active (asyncs [active - 1]) = active;
3552 }
3553
3554 ev_stop (EV_A_ (W)w);
3555
3556 EV_FREQUENT_CHECK;
3557}
3558
3559void
3560ev_async_send (EV_P_ ev_async *w)
3561{
3562 w->sent = 1;
3563 evpipe_write (EV_A_ &async_pending);
3564}
3565#endif
825 3566
826/*****************************************************************************/ 3567/*****************************************************************************/
827 3568
828static void
829wlist_add (WL *head, WL elem)
830{
831 elem->next = *head;
832 *head = elem;
833}
834
835static void
836wlist_del (WL *head, WL elem)
837{
838 while (*head)
839 {
840 if (*head == elem)
841 {
842 *head = elem->next;
843 return;
844 }
845
846 head = &(*head)->next;
847 }
848}
849
850static void
851ev_clear_pending (W w)
852{
853 if (w->pending)
854 {
855 pendings [ABSPRI (w)][w->pending - 1].w = 0;
856 w->pending = 0;
857 }
858}
859
860static void
861ev_start (W w, int active)
862{
863 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
864 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
865
866 w->active = active;
867}
868
869static void
870ev_stop (W w)
871{
872 w->active = 0;
873}
874
875/*****************************************************************************/
876
877void
878ev_io_start (struct ev_io *w)
879{
880 int fd = w->fd;
881
882 if (ev_is_active (w))
883 return;
884
885 assert (("ev_io_start called with negative fd", fd >= 0));
886
887 ev_start ((W)w, 1);
888 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
889 wlist_add ((WL *)&anfds[fd].head, (WL)w);
890
891 fd_change (fd);
892}
893
894void
895ev_io_stop (struct ev_io *w)
896{
897 ev_clear_pending ((W)w);
898 if (!ev_is_active (w))
899 return;
900
901 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
902 ev_stop ((W)w);
903
904 fd_change (w->fd);
905}
906
907void
908ev_timer_start (struct ev_timer *w)
909{
910 if (ev_is_active (w))
911 return;
912
913 w->at += now;
914
915 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
916
917 ev_start ((W)w, ++timercnt);
918 array_needsize (timers, timermax, timercnt, );
919 timers [timercnt - 1] = w;
920 upheap ((WT *)timers, timercnt - 1);
921}
922
923void
924ev_timer_stop (struct ev_timer *w)
925{
926 ev_clear_pending ((W)w);
927 if (!ev_is_active (w))
928 return;
929
930 if (w->active < timercnt--)
931 {
932 timers [w->active - 1] = timers [timercnt];
933 downheap ((WT *)timers, timercnt, w->active - 1);
934 }
935
936 w->at = w->repeat;
937
938 ev_stop ((W)w);
939}
940
941void
942ev_timer_again (struct ev_timer *w)
943{
944 if (ev_is_active (w))
945 {
946 if (w->repeat)
947 {
948 w->at = now + w->repeat;
949 downheap ((WT *)timers, timercnt, w->active - 1);
950 }
951 else
952 ev_timer_stop (w);
953 }
954 else if (w->repeat)
955 ev_timer_start (w);
956}
957
958void
959ev_periodic_start (struct ev_periodic *w)
960{
961 if (ev_is_active (w))
962 return;
963
964 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
965
966 /* this formula differs from the one in periodic_reify because we do not always round up */
967 if (w->interval)
968 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
969
970 ev_start ((W)w, ++periodiccnt);
971 array_needsize (periodics, periodicmax, periodiccnt, );
972 periodics [periodiccnt - 1] = w;
973 upheap ((WT *)periodics, periodiccnt - 1);
974}
975
976void
977ev_periodic_stop (struct ev_periodic *w)
978{
979 ev_clear_pending ((W)w);
980 if (!ev_is_active (w))
981 return;
982
983 if (w->active < periodiccnt--)
984 {
985 periodics [w->active - 1] = periodics [periodiccnt];
986 downheap ((WT *)periodics, periodiccnt, w->active - 1);
987 }
988
989 ev_stop ((W)w);
990}
991
992void
993ev_signal_start (struct ev_signal *w)
994{
995 if (ev_is_active (w))
996 return;
997
998 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
999
1000 ev_start ((W)w, 1);
1001 array_needsize (signals, signalmax, w->signum, signals_init);
1002 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1003
1004 if (!w->next)
1005 {
1006 struct sigaction sa;
1007 sa.sa_handler = sighandler;
1008 sigfillset (&sa.sa_mask);
1009 sa.sa_flags = 0;
1010 sigaction (w->signum, &sa, 0);
1011 }
1012}
1013
1014void
1015ev_signal_stop (struct ev_signal *w)
1016{
1017 ev_clear_pending ((W)w);
1018 if (!ev_is_active (w))
1019 return;
1020
1021 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1022 ev_stop ((W)w);
1023
1024 if (!signals [w->signum - 1].head)
1025 signal (w->signum, SIG_DFL);
1026}
1027
1028void
1029ev_idle_start (struct ev_idle *w)
1030{
1031 if (ev_is_active (w))
1032 return;
1033
1034 ev_start ((W)w, ++idlecnt);
1035 array_needsize (idles, idlemax, idlecnt, );
1036 idles [idlecnt - 1] = w;
1037}
1038
1039void
1040ev_idle_stop (struct ev_idle *w)
1041{
1042 ev_clear_pending ((W)w);
1043 if (ev_is_active (w))
1044 return;
1045
1046 idles [w->active - 1] = idles [--idlecnt];
1047 ev_stop ((W)w);
1048}
1049
1050void
1051ev_prepare_start (struct ev_prepare *w)
1052{
1053 if (ev_is_active (w))
1054 return;
1055
1056 ev_start ((W)w, ++preparecnt);
1057 array_needsize (prepares, preparemax, preparecnt, );
1058 prepares [preparecnt - 1] = w;
1059}
1060
1061void
1062ev_prepare_stop (struct ev_prepare *w)
1063{
1064 ev_clear_pending ((W)w);
1065 if (ev_is_active (w))
1066 return;
1067
1068 prepares [w->active - 1] = prepares [--preparecnt];
1069 ev_stop ((W)w);
1070}
1071
1072void
1073ev_check_start (struct ev_check *w)
1074{
1075 if (ev_is_active (w))
1076 return;
1077
1078 ev_start ((W)w, ++checkcnt);
1079 array_needsize (checks, checkmax, checkcnt, );
1080 checks [checkcnt - 1] = w;
1081}
1082
1083void
1084ev_check_stop (struct ev_check *w)
1085{
1086 ev_clear_pending ((W)w);
1087 if (ev_is_active (w))
1088 return;
1089
1090 checks [w->active - 1] = checks [--checkcnt];
1091 ev_stop ((W)w);
1092}
1093
1094void
1095ev_child_start (struct ev_child *w)
1096{
1097 if (ev_is_active (w))
1098 return;
1099
1100 ev_start ((W)w, 1);
1101 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1102}
1103
1104void
1105ev_child_stop (struct ev_child *w)
1106{
1107 ev_clear_pending ((W)w);
1108 if (ev_is_active (w))
1109 return;
1110
1111 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1112 ev_stop ((W)w);
1113}
1114
1115/*****************************************************************************/
1116
1117struct ev_once 3569struct ev_once
1118{ 3570{
1119 struct ev_io io; 3571 ev_io io;
1120 struct ev_timer to; 3572 ev_timer to;
1121 void (*cb)(int revents, void *arg); 3573 void (*cb)(int revents, void *arg);
1122 void *arg; 3574 void *arg;
1123}; 3575};
1124 3576
1125static void 3577static void
1126once_cb (struct ev_once *once, int revents) 3578once_cb (EV_P_ struct ev_once *once, int revents)
1127{ 3579{
1128 void (*cb)(int revents, void *arg) = once->cb; 3580 void (*cb)(int revents, void *arg) = once->cb;
1129 void *arg = once->arg; 3581 void *arg = once->arg;
1130 3582
1131 ev_io_stop (&once->io); 3583 ev_io_stop (EV_A_ &once->io);
1132 ev_timer_stop (&once->to); 3584 ev_timer_stop (EV_A_ &once->to);
1133 free (once); 3585 ev_free (once);
1134 3586
1135 cb (revents, arg); 3587 cb (revents, arg);
1136} 3588}
1137 3589
1138static void 3590static void
1139once_cb_io (struct ev_io *w, int revents) 3591once_cb_io (EV_P_ ev_io *w, int revents)
1140{ 3592{
1141 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3593 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3594
3595 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1142} 3596}
1143 3597
1144static void 3598static void
1145once_cb_to (struct ev_timer *w, int revents) 3599once_cb_to (EV_P_ ev_timer *w, int revents)
1146{ 3600{
1147 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3601 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
1148}
1149 3602
3603 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3604}
3605
1150void 3606void
1151ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3607ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1152{ 3608{
1153 struct ev_once *once = malloc (sizeof (struct ev_once)); 3609 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1154 3610
1155 if (!once) 3611 if (expect_false (!once))
3612 {
1156 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3613 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1157 else 3614 return;
1158 { 3615 }
3616
1159 once->cb = cb; 3617 once->cb = cb;
1160 once->arg = arg; 3618 once->arg = arg;
1161 3619
1162 ev_watcher_init (&once->io, once_cb_io); 3620 ev_init (&once->io, once_cb_io);
1163 if (fd >= 0) 3621 if (fd >= 0)
3622 {
3623 ev_io_set (&once->io, fd, events);
3624 ev_io_start (EV_A_ &once->io);
3625 }
3626
3627 ev_init (&once->to, once_cb_to);
3628 if (timeout >= 0.)
3629 {
3630 ev_timer_set (&once->to, timeout, 0.);
3631 ev_timer_start (EV_A_ &once->to);
3632 }
3633}
3634
3635/*****************************************************************************/
3636
3637#if EV_WALK_ENABLE
3638void
3639ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3640{
3641 int i, j;
3642 ev_watcher_list *wl, *wn;
3643
3644 if (types & (EV_IO | EV_EMBED))
3645 for (i = 0; i < anfdmax; ++i)
3646 for (wl = anfds [i].head; wl; )
1164 { 3647 {
1165 ev_io_set (&once->io, fd, events); 3648 wn = wl->next;
1166 ev_io_start (&once->io); 3649
3650#if EV_EMBED_ENABLE
3651 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3652 {
3653 if (types & EV_EMBED)
3654 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3655 }
3656 else
3657#endif
3658#if EV_USE_INOTIFY
3659 if (ev_cb ((ev_io *)wl) == infy_cb)
3660 ;
3661 else
3662#endif
3663 if ((ev_io *)wl != &pipe_w)
3664 if (types & EV_IO)
3665 cb (EV_A_ EV_IO, wl);
3666
3667 wl = wn;
1167 } 3668 }
1168 3669
1169 ev_watcher_init (&once->to, once_cb_to); 3670 if (types & (EV_TIMER | EV_STAT))
1170 if (timeout >= 0.) 3671 for (i = timercnt + HEAP0; i-- > HEAP0; )
3672#if EV_STAT_ENABLE
3673 /*TODO: timer is not always active*/
3674 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1171 { 3675 {
1172 ev_timer_set (&once->to, timeout, 0.); 3676 if (types & EV_STAT)
1173 ev_timer_start (&once->to); 3677 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1174 } 3678 }
1175 } 3679 else
1176} 3680#endif
3681 if (types & EV_TIMER)
3682 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1177 3683
1178/*****************************************************************************/ 3684#if EV_PERIODIC_ENABLE
3685 if (types & EV_PERIODIC)
3686 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3687 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3688#endif
1179 3689
1180#if 0 3690#if EV_IDLE_ENABLE
3691 if (types & EV_IDLE)
3692 for (j = NUMPRI; i--; )
3693 for (i = idlecnt [j]; i--; )
3694 cb (EV_A_ EV_IDLE, idles [j][i]);
3695#endif
1181 3696
1182struct ev_io wio; 3697#if EV_FORK_ENABLE
3698 if (types & EV_FORK)
3699 for (i = forkcnt; i--; )
3700 if (ev_cb (forks [i]) != embed_fork_cb)
3701 cb (EV_A_ EV_FORK, forks [i]);
3702#endif
1183 3703
1184static void 3704#if EV_ASYNC_ENABLE
1185sin_cb (struct ev_io *w, int revents) 3705 if (types & EV_ASYNC)
1186{ 3706 for (i = asynccnt; i--; )
1187 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 3707 cb (EV_A_ EV_ASYNC, asyncs [i]);
1188} 3708#endif
1189 3709
1190static void 3710 if (types & EV_PREPARE)
1191ocb (struct ev_timer *w, int revents) 3711 for (i = preparecnt; i--; )
1192{ 3712#if EV_EMBED_ENABLE
1193 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 3713 if (ev_cb (prepares [i]) != embed_prepare_cb)
1194 ev_timer_stop (w); 3714#endif
1195 ev_timer_start (w); 3715 cb (EV_A_ EV_PREPARE, prepares [i]);
1196}
1197 3716
1198static void 3717 if (types & EV_CHECK)
1199scb (struct ev_signal *w, int revents) 3718 for (i = checkcnt; i--; )
1200{ 3719 cb (EV_A_ EV_CHECK, checks [i]);
1201 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1202 ev_io_stop (&wio);
1203 ev_io_start (&wio);
1204}
1205 3720
1206static void 3721 if (types & EV_SIGNAL)
1207gcb (struct ev_signal *w, int revents)
1208{
1209 fprintf (stderr, "generic %x\n", revents);
1210
1211}
1212
1213int main (void)
1214{
1215 ev_init (0);
1216
1217 ev_io_init (&wio, sin_cb, 0, EV_READ);
1218 ev_io_start (&wio);
1219
1220 struct ev_timer t[10000];
1221
1222#if 0
1223 int i;
1224 for (i = 0; i < 10000; ++i) 3722 for (i = 0; i < EV_NSIG - 1; ++i)
1225 { 3723 for (wl = signals [i].head; wl; )
1226 struct ev_timer *w = t + i; 3724 {
1227 ev_watcher_init (w, ocb, i); 3725 wn = wl->next;
1228 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533); 3726 cb (EV_A_ EV_SIGNAL, wl);
1229 ev_timer_start (w); 3727 wl = wn;
1230 if (drand48 () < 0.5) 3728 }
1231 ev_timer_stop (w);
1232 }
1233#endif
1234 3729
1235 struct ev_timer t1; 3730 if (types & EV_CHILD)
1236 ev_timer_init (&t1, ocb, 5, 10); 3731 for (i = EV_PID_HASHSIZE; i--; )
1237 ev_timer_start (&t1); 3732 for (wl = childs [i]; wl; )
1238 3733 {
1239 struct ev_signal sig; 3734 wn = wl->next;
1240 ev_signal_init (&sig, scb, SIGQUIT); 3735 cb (EV_A_ EV_CHILD, wl);
1241 ev_signal_start (&sig); 3736 wl = wn;
1242 3737 }
1243 struct ev_check cw; 3738/* EV_STAT 0x00001000 /* stat data changed */
1244 ev_check_init (&cw, gcb); 3739/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
1245 ev_check_start (&cw);
1246
1247 struct ev_idle iw;
1248 ev_idle_init (&iw, gcb);
1249 ev_idle_start (&iw);
1250
1251 ev_loop (0);
1252
1253 return 0;
1254} 3740}
1255
1256#endif 3741#endif
1257 3742
3743#if EV_MULTIPLICITY
3744 #include "ev_wrap.h"
3745#endif
1258 3746
3747#ifdef __cplusplus
3748}
3749#endif
1259 3750
1260

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