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Comparing libev/ev.c (file contents):
Revision 1.17 by root, Wed Oct 31 14:44:15 2007 UTC vs.
Revision 1.402 by sf-exg, Tue Dec 20 10:34:10 2011 UTC

1/* 1/*
2 * libev event processing core, watcher management
3 *
2 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>
3 * All rights reserved. 5 * All rights reserved.
4 * 6 *
5 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
6 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
7 * met:
8 * 9 *
9 * * Redistributions of source code must retain the above copyright 10 * 1. Redistributions of source code must retain the above copyright notice,
10 * notice, this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
11 * 12 *
12 * * Redistributions in binary form must reproduce the above 13 * 2. Redistributions in binary form must reproduce the above copyright
13 * copyright notice, this list of conditions and the following 14 * notice, this list of conditions and the following disclaimer in the
14 * disclaimer in the documentation and/or other materials provided 15 * documentation and/or other materials provided with the distribution.
15 * with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
28 */ 38 */
29 39
30#include <math.h> 40/* this big block deduces configuration from config.h */
41#ifndef EV_STANDALONE
42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H
44# else
45# include "config.h"
46# endif
47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined(EV_USE_CLOCK_SYSCALL)
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
67
68# if HAVE_CLOCK_GETTIME
69# ifndef EV_USE_MONOTONIC
70# define EV_USE_MONOTONIC 1
71# endif
72# ifndef EV_USE_REALTIME
73# define EV_USE_REALTIME 0
74# endif
75# else
76# ifndef EV_USE_MONOTONIC
77# define EV_USE_MONOTONIC 0
78# endif
79# ifndef EV_USE_REALTIME
80# define EV_USE_REALTIME 0
81# endif
82# endif
83
84# if HAVE_NANOSLEEP
85# ifndef EV_USE_NANOSLEEP
86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
88# else
89# undef EV_USE_NANOSLEEP
90# define EV_USE_NANOSLEEP 0
91# endif
92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
94# ifndef EV_USE_SELECT
95# define EV_USE_SELECT EV_FEATURE_BACKENDS
96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
100# endif
101
102# if HAVE_POLL && HAVE_POLL_H
103# ifndef EV_USE_POLL
104# define EV_USE_POLL EV_FEATURE_BACKENDS
105# endif
106# else
107# undef EV_USE_POLL
108# define EV_USE_POLL 0
109# endif
110
111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
112# ifndef EV_USE_EPOLL
113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
118# endif
119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
121# ifndef EV_USE_KQUEUE
122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
127# endif
128
129# if HAVE_PORT_H && HAVE_PORT_CREATE
130# ifndef EV_USE_PORT
131# define EV_USE_PORT EV_FEATURE_BACKENDS
132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
136# endif
137
138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
139# ifndef EV_USE_INOTIFY
140# define EV_USE_INOTIFY EV_FEATURE_OS
141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
145# endif
146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
149# define EV_USE_SIGNALFD EV_FEATURE_OS
150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
154# endif
155
156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
163# endif
164
165#endif
166
31#include <stdlib.h> 167#include <stdlib.h>
32#include <unistd.h> 168#include <string.h>
33#include <fcntl.h> 169#include <fcntl.h>
34#include <signal.h>
35#include <stddef.h> 170#include <stddef.h>
36 171
37#include <stdio.h> 172#include <stdio.h>
38 173
39#include <assert.h> 174#include <assert.h>
40#include <errno.h> 175#include <errno.h>
41#include <sys/time.h> 176#include <sys/types.h>
42#include <time.h> 177#include <time.h>
178#include <limits.h>
43 179
44#define HAVE_EPOLL 1 180#include <signal.h>
45 181
46#ifndef HAVE_MONOTONIC 182#ifdef EV_H
47# ifdef CLOCK_MONOTONIC 183# include EV_H
48# define HAVE_MONOTONIC 1 184#else
185# include "ev.h"
186#endif
187
188#ifndef _WIN32
189# include <sys/time.h>
190# include <sys/wait.h>
191# include <unistd.h>
192#else
193# include <io.h>
194# define WIN32_LEAN_AND_MEAN
195# include <windows.h>
196# ifndef EV_SELECT_IS_WINSOCKET
197# define EV_SELECT_IS_WINSOCKET 1
49# endif 198# endif
199# undef EV_AVOID_STDIO
200#endif
201
202/* OS X, in its infinite idiocy, actually HARDCODES
203 * a limit of 1024 into their select. Where people have brains,
204 * OS X engineers apparently have a vacuum. Or maybe they were
205 * ordered to have a vacuum, or they do anything for money.
206 * This might help. Or not.
207 */
208#define _DARWIN_UNLIMITED_SELECT 1
209
210/* this block tries to deduce configuration from header-defined symbols and defaults */
211
212/* try to deduce the maximum number of signals on this platform */
213#if defined (EV_NSIG)
214/* use what's provided */
215#elif defined (NSIG)
216# define EV_NSIG (NSIG)
217#elif defined(_NSIG)
218# define EV_NSIG (_NSIG)
219#elif defined (SIGMAX)
220# define EV_NSIG (SIGMAX+1)
221#elif defined (SIG_MAX)
222# define EV_NSIG (SIG_MAX+1)
223#elif defined (_SIG_MAX)
224# define EV_NSIG (_SIG_MAX+1)
225#elif defined (MAXSIG)
226# define EV_NSIG (MAXSIG+1)
227#elif defined (MAX_SIG)
228# define EV_NSIG (MAX_SIG+1)
229#elif defined (SIGARRAYSIZE)
230# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
231#elif defined (_sys_nsig)
232# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
233#else
234# error "unable to find value for NSIG, please report"
235/* to make it compile regardless, just remove the above line, */
236/* but consider reporting it, too! :) */
237# define EV_NSIG 65
238#endif
239
240#ifndef EV_USE_FLOOR
241# define EV_USE_FLOOR 0
242#endif
243
244#ifndef EV_USE_CLOCK_SYSCALL
245# if __linux && __GLIBC__ >= 2
246# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
247# else
248# define EV_USE_CLOCK_SYSCALL 0
50#endif 249# endif
250#endif
51 251
52#ifndef HAVE_SELECT 252#ifndef EV_USE_MONOTONIC
53# define HAVE_SELECT 1 253# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
254# define EV_USE_MONOTONIC EV_FEATURE_OS
255# else
256# define EV_USE_MONOTONIC 0
54#endif 257# endif
258#endif
55 259
56#ifndef HAVE_EPOLL 260#ifndef EV_USE_REALTIME
57# define HAVE_EPOLL 0 261# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
262#endif
263
264#ifndef EV_USE_NANOSLEEP
265# if _POSIX_C_SOURCE >= 199309L
266# define EV_USE_NANOSLEEP EV_FEATURE_OS
267# else
268# define EV_USE_NANOSLEEP 0
58#endif 269# endif
270#endif
59 271
60#ifndef HAVE_REALTIME 272#ifndef EV_USE_SELECT
61# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ 273# define EV_USE_SELECT EV_FEATURE_BACKENDS
274#endif
275
276#ifndef EV_USE_POLL
277# ifdef _WIN32
278# define EV_USE_POLL 0
279# else
280# define EV_USE_POLL EV_FEATURE_BACKENDS
62#endif 281# endif
282#endif
283
284#ifndef EV_USE_EPOLL
285# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
286# define EV_USE_EPOLL EV_FEATURE_BACKENDS
287# else
288# define EV_USE_EPOLL 0
289# endif
290#endif
291
292#ifndef EV_USE_KQUEUE
293# define EV_USE_KQUEUE 0
294#endif
295
296#ifndef EV_USE_PORT
297# define EV_USE_PORT 0
298#endif
299
300#ifndef EV_USE_INOTIFY
301# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
302# define EV_USE_INOTIFY EV_FEATURE_OS
303# else
304# define EV_USE_INOTIFY 0
305# endif
306#endif
307
308#ifndef EV_PID_HASHSIZE
309# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
310#endif
311
312#ifndef EV_INOTIFY_HASHSIZE
313# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
314#endif
315
316#ifndef EV_USE_EVENTFD
317# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
318# define EV_USE_EVENTFD EV_FEATURE_OS
319# else
320# define EV_USE_EVENTFD 0
321# endif
322#endif
323
324#ifndef EV_USE_SIGNALFD
325# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
326# define EV_USE_SIGNALFD EV_FEATURE_OS
327# else
328# define EV_USE_SIGNALFD 0
329# endif
330#endif
331
332#if 0 /* debugging */
333# define EV_VERIFY 3
334# define EV_USE_4HEAP 1
335# define EV_HEAP_CACHE_AT 1
336#endif
337
338#ifndef EV_VERIFY
339# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
340#endif
341
342#ifndef EV_USE_4HEAP
343# define EV_USE_4HEAP EV_FEATURE_DATA
344#endif
345
346#ifndef EV_HEAP_CACHE_AT
347# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
348#endif
349
350/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
351/* which makes programs even slower. might work on other unices, too. */
352#if EV_USE_CLOCK_SYSCALL
353# include <syscall.h>
354# ifdef SYS_clock_gettime
355# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
356# undef EV_USE_MONOTONIC
357# define EV_USE_MONOTONIC 1
358# else
359# undef EV_USE_CLOCK_SYSCALL
360# define EV_USE_CLOCK_SYSCALL 0
361# endif
362#endif
363
364/* this block fixes any misconfiguration where we know we run into trouble otherwise */
365
366#ifdef _AIX
367/* AIX has a completely broken poll.h header */
368# undef EV_USE_POLL
369# define EV_USE_POLL 0
370#endif
371
372#ifndef CLOCK_MONOTONIC
373# undef EV_USE_MONOTONIC
374# define EV_USE_MONOTONIC 0
375#endif
376
377#ifndef CLOCK_REALTIME
378# undef EV_USE_REALTIME
379# define EV_USE_REALTIME 0
380#endif
381
382#if !EV_STAT_ENABLE
383# undef EV_USE_INOTIFY
384# define EV_USE_INOTIFY 0
385#endif
386
387#if !EV_USE_NANOSLEEP
388/* hp-ux has it in sys/time.h, which we unconditionally include above */
389# if !defined(_WIN32) && !defined(__hpux)
390# include <sys/select.h>
391# endif
392#endif
393
394#if EV_USE_INOTIFY
395# include <sys/statfs.h>
396# include <sys/inotify.h>
397/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
398# ifndef IN_DONT_FOLLOW
399# undef EV_USE_INOTIFY
400# define EV_USE_INOTIFY 0
401# endif
402#endif
403
404#if EV_SELECT_IS_WINSOCKET
405# include <winsock.h>
406#endif
407
408#if EV_USE_EVENTFD
409/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
410# include <stdint.h>
411# ifndef EFD_NONBLOCK
412# define EFD_NONBLOCK O_NONBLOCK
413# endif
414# ifndef EFD_CLOEXEC
415# ifdef O_CLOEXEC
416# define EFD_CLOEXEC O_CLOEXEC
417# else
418# define EFD_CLOEXEC 02000000
419# endif
420# endif
421EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
422#endif
423
424#if EV_USE_SIGNALFD
425/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
426# include <stdint.h>
427# ifndef SFD_NONBLOCK
428# define SFD_NONBLOCK O_NONBLOCK
429# endif
430# ifndef SFD_CLOEXEC
431# ifdef O_CLOEXEC
432# define SFD_CLOEXEC O_CLOEXEC
433# else
434# define SFD_CLOEXEC 02000000
435# endif
436# endif
437EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
438
439struct signalfd_siginfo
440{
441 uint32_t ssi_signo;
442 char pad[128 - sizeof (uint32_t)];
443};
444#endif
445
446/**/
447
448#if EV_VERIFY >= 3
449# define EV_FREQUENT_CHECK ev_verify (EV_A)
450#else
451# define EV_FREQUENT_CHECK do { } while (0)
452#endif
453
454/*
455 * This is used to work around floating point rounding problems.
456 * This value is good at least till the year 4000.
457 */
458#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
459/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
63 460
64#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 461#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65#define MAX_BLOCKTIME 60. 462#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
66 463
67#include "ev.h" 464#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
465#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
68 466
69typedef struct ev_watcher *W; 467/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
70typedef struct ev_watcher_list *WL; 468/* ECB.H BEGIN */
71typedef struct ev_watcher_time *WT; 469/*
470 * libecb - http://software.schmorp.de/pkg/libecb
471 *
472 * Copyright (©) 2009-2011 Marc Alexander Lehmann <libecb@schmorp.de>
473 * Copyright (©) 2011 Emanuele Giaquinta
474 * All rights reserved.
475 *
476 * Redistribution and use in source and binary forms, with or without modifica-
477 * tion, are permitted provided that the following conditions are met:
478 *
479 * 1. Redistributions of source code must retain the above copyright notice,
480 * this list of conditions and the following disclaimer.
481 *
482 * 2. Redistributions in binary form must reproduce the above copyright
483 * notice, this list of conditions and the following disclaimer in the
484 * documentation and/or other materials provided with the distribution.
485 *
486 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
487 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
488 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
489 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
490 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
491 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
492 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
493 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
494 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
495 * OF THE POSSIBILITY OF SUCH DAMAGE.
496 */
72 497
73static ev_tstamp now, diff; /* monotonic clock */ 498#ifndef ECB_H
74ev_tstamp ev_now; 499#define ECB_H
75int ev_method;
76 500
77static int have_monotonic; /* runtime */ 501#ifdef _WIN32
502 typedef signed char int8_t;
503 typedef unsigned char uint8_t;
504 typedef signed short int16_t;
505 typedef unsigned short uint16_t;
506 typedef signed int int32_t;
507 typedef unsigned int uint32_t;
508 #if __GNUC__
509 typedef signed long long int64_t;
510 typedef unsigned long long uint64_t;
511 #else /* _MSC_VER || __BORLANDC__ */
512 typedef signed __int64 int64_t;
513 typedef unsigned __int64 uint64_t;
514 #endif
515#else
516 #include <inttypes.h>
517#endif
78 518
79static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 519/* many compilers define _GNUC_ to some versions but then only implement
80static void (*method_modify)(int fd, int oev, int nev); 520 * what their idiot authors think are the "more important" extensions,
81static void (*method_poll)(ev_tstamp timeout); 521 * causing enormous grief in return for some better fake benchmark numbers.
522 * or so.
523 * we try to detect these and simply assume they are not gcc - if they have
524 * an issue with that they should have done it right in the first place.
525 */
526#ifndef ECB_GCC_VERSION
527 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__)
528 #define ECB_GCC_VERSION(major,minor) 0
529 #else
530 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
531 #endif
532#endif
82 533
83/*****************************************************************************/ 534/*****************************************************************************/
84 535
536/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
537/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
538
539#if ECB_NO_THREADS || ECB_NO_SMP
540 #define ECB_MEMORY_FENCE do { } while (0)
541#endif
542
543#ifndef ECB_MEMORY_FENCE
544 #if ECB_GCC_VERSION(2,5) || defined(__INTEL_COMPILER) || defined(__clang__)
545 #if __i386__
546 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
547 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
548 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
549 #elif __amd64
550 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
551 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
552 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
553 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
554 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
555 #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \
556 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__)
557 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
558 #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \
559 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )
560 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
561 #endif
562 #endif
563#endif
564
565#ifndef ECB_MEMORY_FENCE
566 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) || defined(__clang__)
567 #define ECB_MEMORY_FENCE __sync_synchronize ()
568 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
569 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
570 #elif _MSC_VER >= 1400 /* VC++ 2005 */
571 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
572 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
573 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
574 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
575 #elif defined(_WIN32)
576 #include <WinNT.h>
577 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
578 #endif
579#endif
580
581#ifndef ECB_MEMORY_FENCE
582 #if !ECB_AVOID_PTHREADS
583 /*
584 * if you get undefined symbol references to pthread_mutex_lock,
585 * or failure to find pthread.h, then you should implement
586 * the ECB_MEMORY_FENCE operations for your cpu/compiler
587 * OR provide pthread.h and link against the posix thread library
588 * of your system.
589 */
590 #include <pthread.h>
591 #define ECB_NEEDS_PTHREADS 1
592 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
593
594 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
595 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
596 #endif
597#endif
598
599#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
600 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
601#endif
602
603#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
604 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
605#endif
606
607/*****************************************************************************/
608
609#define ECB_C99 (__STDC_VERSION__ >= 199901L)
610
611#if __cplusplus
612 #define ecb_inline static inline
613#elif ECB_GCC_VERSION(2,5)
614 #define ecb_inline static __inline__
615#elif ECB_C99
616 #define ecb_inline static inline
617#else
618 #define ecb_inline static
619#endif
620
621#if ECB_GCC_VERSION(3,3)
622 #define ecb_restrict __restrict__
623#elif ECB_C99
624 #define ecb_restrict restrict
625#else
626 #define ecb_restrict
627#endif
628
629typedef int ecb_bool;
630
631#define ECB_CONCAT_(a, b) a ## b
632#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
633#define ECB_STRINGIFY_(a) # a
634#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
635
636#define ecb_function_ ecb_inline
637
638#if ECB_GCC_VERSION(3,1)
639 #define ecb_attribute(attrlist) __attribute__(attrlist)
640 #define ecb_is_constant(expr) __builtin_constant_p (expr)
641 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
642 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
643#else
644 #define ecb_attribute(attrlist)
645 #define ecb_is_constant(expr) 0
646 #define ecb_expect(expr,value) (expr)
647 #define ecb_prefetch(addr,rw,locality)
648#endif
649
650/* no emulation for ecb_decltype */
651#if ECB_GCC_VERSION(4,5)
652 #define ecb_decltype(x) __decltype(x)
653#elif ECB_GCC_VERSION(3,0)
654 #define ecb_decltype(x) __typeof(x)
655#endif
656
657#define ecb_noinline ecb_attribute ((__noinline__))
658#define ecb_noreturn ecb_attribute ((__noreturn__))
659#define ecb_unused ecb_attribute ((__unused__))
660#define ecb_const ecb_attribute ((__const__))
661#define ecb_pure ecb_attribute ((__pure__))
662
663#if ECB_GCC_VERSION(4,3)
664 #define ecb_artificial ecb_attribute ((__artificial__))
665 #define ecb_hot ecb_attribute ((__hot__))
666 #define ecb_cold ecb_attribute ((__cold__))
667#else
668 #define ecb_artificial
669 #define ecb_hot
670 #define ecb_cold
671#endif
672
673/* put around conditional expressions if you are very sure that the */
674/* expression is mostly true or mostly false. note that these return */
675/* booleans, not the expression. */
676#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
677#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
678/* for compatibility to the rest of the world */
679#define ecb_likely(expr) ecb_expect_true (expr)
680#define ecb_unlikely(expr) ecb_expect_false (expr)
681
682/* count trailing zero bits and count # of one bits */
683#if ECB_GCC_VERSION(3,4)
684 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
685 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
686 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
687 #define ecb_ctz32(x) __builtin_ctz (x)
688 #define ecb_ctz64(x) __builtin_ctzll (x)
689 #define ecb_popcount32(x) __builtin_popcount (x)
690 /* no popcountll */
691#else
692 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
693 ecb_function_ int
694 ecb_ctz32 (uint32_t x)
695 {
696 int r = 0;
697
698 x &= ~x + 1; /* this isolates the lowest bit */
699
700#if ECB_branchless_on_i386
701 r += !!(x & 0xaaaaaaaa) << 0;
702 r += !!(x & 0xcccccccc) << 1;
703 r += !!(x & 0xf0f0f0f0) << 2;
704 r += !!(x & 0xff00ff00) << 3;
705 r += !!(x & 0xffff0000) << 4;
706#else
707 if (x & 0xaaaaaaaa) r += 1;
708 if (x & 0xcccccccc) r += 2;
709 if (x & 0xf0f0f0f0) r += 4;
710 if (x & 0xff00ff00) r += 8;
711 if (x & 0xffff0000) r += 16;
712#endif
713
714 return r;
715 }
716
717 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
718 ecb_function_ int
719 ecb_ctz64 (uint64_t x)
720 {
721 int shift = x & 0xffffffffU ? 0 : 32;
722 return ecb_ctz32 (x >> shift) + shift;
723 }
724
725 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
726 ecb_function_ int
727 ecb_popcount32 (uint32_t x)
728 {
729 x -= (x >> 1) & 0x55555555;
730 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
731 x = ((x >> 4) + x) & 0x0f0f0f0f;
732 x *= 0x01010101;
733
734 return x >> 24;
735 }
736
737 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
738 ecb_function_ int ecb_ld32 (uint32_t x)
739 {
740 int r = 0;
741
742 if (x >> 16) { x >>= 16; r += 16; }
743 if (x >> 8) { x >>= 8; r += 8; }
744 if (x >> 4) { x >>= 4; r += 4; }
745 if (x >> 2) { x >>= 2; r += 2; }
746 if (x >> 1) { r += 1; }
747
748 return r;
749 }
750
751 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
752 ecb_function_ int ecb_ld64 (uint64_t x)
753 {
754 int r = 0;
755
756 if (x >> 32) { x >>= 32; r += 32; }
757
758 return r + ecb_ld32 (x);
759 }
760#endif
761
762/* popcount64 is only available on 64 bit cpus as gcc builtin */
763/* so for this version we are lazy */
764ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
765ecb_function_ int
766ecb_popcount64 (uint64_t x)
767{
768 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
769}
770
771ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
772ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
773ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
774ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
775ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
776ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
777ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
778ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
779
780ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
781ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
782ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
783ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
784ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
785ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
786ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
787ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
788
789#if ECB_GCC_VERSION(4,3)
790 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
791 #define ecb_bswap32(x) __builtin_bswap32 (x)
792 #define ecb_bswap64(x) __builtin_bswap64 (x)
793#else
794 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
795 ecb_function_ uint16_t
796 ecb_bswap16 (uint16_t x)
797 {
798 return ecb_rotl16 (x, 8);
799 }
800
801 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
802 ecb_function_ uint32_t
803 ecb_bswap32 (uint32_t x)
804 {
805 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
806 }
807
808 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
809 ecb_function_ uint64_t
810 ecb_bswap64 (uint64_t x)
811 {
812 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
813 }
814#endif
815
816#if ECB_GCC_VERSION(4,5)
817 #define ecb_unreachable() __builtin_unreachable ()
818#else
819 /* this seems to work fine, but gcc always emits a warning for it :/ */
820 ecb_function_ void ecb_unreachable (void) ecb_noreturn;
821 ecb_function_ void ecb_unreachable (void) { }
822#endif
823
824/* try to tell the compiler that some condition is definitely true */
825#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
826
827ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;
828ecb_function_ unsigned char
829ecb_byteorder_helper (void)
830{
831 const uint32_t u = 0x11223344;
832 return *(unsigned char *)&u;
833}
834
835ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;
836ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
837ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;
838ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
839
840#if ECB_GCC_VERSION(3,0) || ECB_C99
841 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
842#else
843 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
844#endif
845
846#if __cplusplus
847 template<typename T>
848 static inline T ecb_div_rd (T val, T div)
849 {
850 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
851 }
852 template<typename T>
853 static inline T ecb_div_ru (T val, T div)
854 {
855 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
856 }
857#else
858 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
859 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
860#endif
861
862#if ecb_cplusplus_does_not_suck
863 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
864 template<typename T, int N>
865 static inline int ecb_array_length (const T (&arr)[N])
866 {
867 return N;
868 }
869#else
870 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
871#endif
872
873#endif
874
875/* ECB.H END */
876
877#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
878/* if your architecture doesn't need memory fences, e.g. because it is
879 * single-cpu/core, or if you use libev in a project that doesn't use libev
880 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
881 * libev, in which cases the memory fences become nops.
882 * alternatively, you can remove this #error and link against libpthread,
883 * which will then provide the memory fences.
884 */
885# error "memory fences not defined for your architecture, please report"
886#endif
887
888#ifndef ECB_MEMORY_FENCE
889# define ECB_MEMORY_FENCE do { } while (0)
890# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
891# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
892#endif
893
894#define expect_false(cond) ecb_expect_false (cond)
895#define expect_true(cond) ecb_expect_true (cond)
896#define noinline ecb_noinline
897
898#define inline_size ecb_inline
899
900#if EV_FEATURE_CODE
901# define inline_speed ecb_inline
902#else
903# define inline_speed static noinline
904#endif
905
906#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
907
908#if EV_MINPRI == EV_MAXPRI
909# define ABSPRI(w) (((W)w), 0)
910#else
911# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
912#endif
913
914#define EMPTY /* required for microsofts broken pseudo-c compiler */
915#define EMPTY2(a,b) /* used to suppress some warnings */
916
917typedef ev_watcher *W;
918typedef ev_watcher_list *WL;
919typedef ev_watcher_time *WT;
920
921#define ev_active(w) ((W)(w))->active
922#define ev_at(w) ((WT)(w))->at
923
924#if EV_USE_REALTIME
925/* sig_atomic_t is used to avoid per-thread variables or locking but still */
926/* giving it a reasonably high chance of working on typical architectures */
927static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
928#endif
929
930#if EV_USE_MONOTONIC
931static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
932#endif
933
934#ifndef EV_FD_TO_WIN32_HANDLE
935# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
936#endif
937#ifndef EV_WIN32_HANDLE_TO_FD
938# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
939#endif
940#ifndef EV_WIN32_CLOSE_FD
941# define EV_WIN32_CLOSE_FD(fd) close (fd)
942#endif
943
944#ifdef _WIN32
945# include "ev_win32.c"
946#endif
947
948/*****************************************************************************/
949
950/* define a suitable floor function (only used by periodics atm) */
951
952#if EV_USE_FLOOR
953# include <math.h>
954# define ev_floor(v) floor (v)
955#else
956
957#include <float.h>
958
959/* a floor() replacement function, should be independent of ev_tstamp type */
960static ev_tstamp noinline
961ev_floor (ev_tstamp v)
962{
963 /* the choice of shift factor is not terribly important */
964#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
965 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
966#else
967 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
968#endif
969
970 /* argument too large for an unsigned long? */
971 if (expect_false (v >= shift))
972 {
973 ev_tstamp f;
974
975 if (v == v - 1.)
976 return v; /* very large number */
977
978 f = shift * ev_floor (v * (1. / shift));
979 return f + ev_floor (v - f);
980 }
981
982 /* special treatment for negative args? */
983 if (expect_false (v < 0.))
984 {
985 ev_tstamp f = -ev_floor (-v);
986
987 return f - (f == v ? 0 : 1);
988 }
989
990 /* fits into an unsigned long */
991 return (unsigned long)v;
992}
993
994#endif
995
996/*****************************************************************************/
997
998#ifdef __linux
999# include <sys/utsname.h>
1000#endif
1001
1002static unsigned int noinline ecb_cold
1003ev_linux_version (void)
1004{
1005#ifdef __linux
1006 unsigned int v = 0;
1007 struct utsname buf;
1008 int i;
1009 char *p = buf.release;
1010
1011 if (uname (&buf))
1012 return 0;
1013
1014 for (i = 3+1; --i; )
1015 {
1016 unsigned int c = 0;
1017
1018 for (;;)
1019 {
1020 if (*p >= '0' && *p <= '9')
1021 c = c * 10 + *p++ - '0';
1022 else
1023 {
1024 p += *p == '.';
1025 break;
1026 }
1027 }
1028
1029 v = (v << 8) | c;
1030 }
1031
1032 return v;
1033#else
1034 return 0;
1035#endif
1036}
1037
1038/*****************************************************************************/
1039
1040#if EV_AVOID_STDIO
1041static void noinline ecb_cold
1042ev_printerr (const char *msg)
1043{
1044 write (STDERR_FILENO, msg, strlen (msg));
1045}
1046#endif
1047
1048static void (*syserr_cb)(const char *msg);
1049
1050void ecb_cold
1051ev_set_syserr_cb (void (*cb)(const char *msg))
1052{
1053 syserr_cb = cb;
1054}
1055
1056static void noinline ecb_cold
1057ev_syserr (const char *msg)
1058{
1059 if (!msg)
1060 msg = "(libev) system error";
1061
1062 if (syserr_cb)
1063 syserr_cb (msg);
1064 else
1065 {
1066#if EV_AVOID_STDIO
1067 ev_printerr (msg);
1068 ev_printerr (": ");
1069 ev_printerr (strerror (errno));
1070 ev_printerr ("\n");
1071#else
1072 perror (msg);
1073#endif
1074 abort ();
1075 }
1076}
1077
1078static void *
1079ev_realloc_emul (void *ptr, long size)
1080{
1081#if __GLIBC__
1082 return realloc (ptr, size);
1083#else
1084 /* some systems, notably openbsd and darwin, fail to properly
1085 * implement realloc (x, 0) (as required by both ansi c-89 and
1086 * the single unix specification, so work around them here.
1087 */
1088
1089 if (size)
1090 return realloc (ptr, size);
1091
1092 free (ptr);
1093 return 0;
1094#endif
1095}
1096
1097static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
1098
1099void ecb_cold
1100ev_set_allocator (void *(*cb)(void *ptr, long size))
1101{
1102 alloc = cb;
1103}
1104
1105inline_speed void *
1106ev_realloc (void *ptr, long size)
1107{
1108 ptr = alloc (ptr, size);
1109
1110 if (!ptr && size)
1111 {
1112#if EV_AVOID_STDIO
1113 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1114#else
1115 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1116#endif
1117 abort ();
1118 }
1119
1120 return ptr;
1121}
1122
1123#define ev_malloc(size) ev_realloc (0, (size))
1124#define ev_free(ptr) ev_realloc ((ptr), 0)
1125
1126/*****************************************************************************/
1127
1128/* set in reify when reification needed */
1129#define EV_ANFD_REIFY 1
1130
1131/* file descriptor info structure */
1132typedef struct
1133{
1134 WL head;
1135 unsigned char events; /* the events watched for */
1136 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1137 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
1138 unsigned char unused;
1139#if EV_USE_EPOLL
1140 unsigned int egen; /* generation counter to counter epoll bugs */
1141#endif
1142#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1143 SOCKET handle;
1144#endif
1145#if EV_USE_IOCP
1146 OVERLAPPED or, ow;
1147#endif
1148} ANFD;
1149
1150/* stores the pending event set for a given watcher */
1151typedef struct
1152{
1153 W w;
1154 int events; /* the pending event set for the given watcher */
1155} ANPENDING;
1156
1157#if EV_USE_INOTIFY
1158/* hash table entry per inotify-id */
1159typedef struct
1160{
1161 WL head;
1162} ANFS;
1163#endif
1164
1165/* Heap Entry */
1166#if EV_HEAP_CACHE_AT
1167 /* a heap element */
1168 typedef struct {
1169 ev_tstamp at;
1170 WT w;
1171 } ANHE;
1172
1173 #define ANHE_w(he) (he).w /* access watcher, read-write */
1174 #define ANHE_at(he) (he).at /* access cached at, read-only */
1175 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1176#else
1177 /* a heap element */
1178 typedef WT ANHE;
1179
1180 #define ANHE_w(he) (he)
1181 #define ANHE_at(he) (he)->at
1182 #define ANHE_at_cache(he)
1183#endif
1184
1185#if EV_MULTIPLICITY
1186
1187 struct ev_loop
1188 {
1189 ev_tstamp ev_rt_now;
1190 #define ev_rt_now ((loop)->ev_rt_now)
1191 #define VAR(name,decl) decl;
1192 #include "ev_vars.h"
1193 #undef VAR
1194 };
1195 #include "ev_wrap.h"
1196
1197 static struct ev_loop default_loop_struct;
1198 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
1199
1200#else
1201
1202 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
1203 #define VAR(name,decl) static decl;
1204 #include "ev_vars.h"
1205 #undef VAR
1206
1207 static int ev_default_loop_ptr;
1208
1209#endif
1210
1211#if EV_FEATURE_API
1212# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1213# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1214# define EV_INVOKE_PENDING invoke_cb (EV_A)
1215#else
1216# define EV_RELEASE_CB (void)0
1217# define EV_ACQUIRE_CB (void)0
1218# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1219#endif
1220
1221#define EVBREAK_RECURSE 0x80
1222
1223/*****************************************************************************/
1224
1225#ifndef EV_HAVE_EV_TIME
85ev_tstamp 1226ev_tstamp
86ev_time (void) 1227ev_time (void)
87{ 1228{
88#if HAVE_REALTIME 1229#if EV_USE_REALTIME
1230 if (expect_true (have_realtime))
1231 {
89 struct timespec ts; 1232 struct timespec ts;
90 clock_gettime (CLOCK_REALTIME, &ts); 1233 clock_gettime (CLOCK_REALTIME, &ts);
91 return ts.tv_sec + ts.tv_nsec * 1e-9; 1234 return ts.tv_sec + ts.tv_nsec * 1e-9;
92#else 1235 }
1236#endif
1237
93 struct timeval tv; 1238 struct timeval tv;
94 gettimeofday (&tv, 0); 1239 gettimeofday (&tv, 0);
95 return tv.tv_sec + tv.tv_usec * 1e-6; 1240 return tv.tv_sec + tv.tv_usec * 1e-6;
96#endif
97} 1241}
1242#endif
98 1243
99static ev_tstamp 1244inline_size ev_tstamp
100get_clock (void) 1245get_clock (void)
101{ 1246{
102#if HAVE_MONOTONIC 1247#if EV_USE_MONOTONIC
103 if (have_monotonic) 1248 if (expect_true (have_monotonic))
104 { 1249 {
105 struct timespec ts; 1250 struct timespec ts;
106 clock_gettime (CLOCK_MONOTONIC, &ts); 1251 clock_gettime (CLOCK_MONOTONIC, &ts);
107 return ts.tv_sec + ts.tv_nsec * 1e-9; 1252 return ts.tv_sec + ts.tv_nsec * 1e-9;
108 } 1253 }
109#endif 1254#endif
110 1255
111 return ev_time (); 1256 return ev_time ();
112} 1257}
113 1258
114#define array_needsize(base,cur,cnt,init) \ 1259#if EV_MULTIPLICITY
115 if ((cnt) > cur) \ 1260ev_tstamp
116 { \ 1261ev_now (EV_P)
117 int newcnt = cur ? cur << 1 : 16; \ 1262{
118 base = realloc (base, sizeof (*base) * (newcnt)); \ 1263 return ev_rt_now;
119 init (base + cur, newcnt - cur); \ 1264}
120 cur = newcnt; \ 1265#endif
1266
1267void
1268ev_sleep (ev_tstamp delay)
1269{
1270 if (delay > 0.)
121 } 1271 {
1272#if EV_USE_NANOSLEEP
1273 struct timespec ts;
1274
1275 EV_TS_SET (ts, delay);
1276 nanosleep (&ts, 0);
1277#elif defined(_WIN32)
1278 Sleep ((unsigned long)(delay * 1e3));
1279#else
1280 struct timeval tv;
1281
1282 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1283 /* something not guaranteed by newer posix versions, but guaranteed */
1284 /* by older ones */
1285 EV_TV_SET (tv, delay);
1286 select (0, 0, 0, 0, &tv);
1287#endif
1288 }
1289}
122 1290
123/*****************************************************************************/ 1291/*****************************************************************************/
124 1292
125typedef struct 1293#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
126{
127 struct ev_io *head;
128 unsigned char wev, rev; /* want, received event set */
129} ANFD;
130 1294
131static ANFD *anfds; 1295/* find a suitable new size for the given array, */
132static int anfdmax; 1296/* hopefully by rounding to a nice-to-malloc size */
133 1297inline_size int
134static int *fdchanges; 1298array_nextsize (int elem, int cur, int cnt)
135static int fdchangemax, fdchangecnt;
136
137static void
138anfds_init (ANFD *base, int count)
139{ 1299{
140 while (count--) 1300 int ncur = cur + 1;
141 { 1301
142 base->head = 0; 1302 do
143 base->wev = base->rev = EV_NONE; 1303 ncur <<= 1;
144 ++base; 1304 while (cnt > ncur);
1305
1306 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
1307 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
145 } 1308 {
146} 1309 ncur *= elem;
147 1310 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
148typedef struct 1311 ncur = ncur - sizeof (void *) * 4;
149{ 1312 ncur /= elem;
150 W w;
151 int events;
152} ANPENDING;
153
154static ANPENDING *pendings;
155static int pendingmax, pendingcnt;
156
157static void
158event (W w, int events)
159{
160 if (w->active)
161 { 1313 }
1314
1315 return ncur;
1316}
1317
1318static void * noinline ecb_cold
1319array_realloc (int elem, void *base, int *cur, int cnt)
1320{
1321 *cur = array_nextsize (elem, *cur, cnt);
1322 return ev_realloc (base, elem * *cur);
1323}
1324
1325#define array_init_zero(base,count) \
1326 memset ((void *)(base), 0, sizeof (*(base)) * (count))
1327
1328#define array_needsize(type,base,cur,cnt,init) \
1329 if (expect_false ((cnt) > (cur))) \
1330 { \
1331 int ecb_unused ocur_ = (cur); \
1332 (base) = (type *)array_realloc \
1333 (sizeof (type), (base), &(cur), (cnt)); \
1334 init ((base) + (ocur_), (cur) - ocur_); \
1335 }
1336
1337#if 0
1338#define array_slim(type,stem) \
1339 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
1340 { \
1341 stem ## max = array_roundsize (stem ## cnt >> 1); \
1342 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
1343 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
1344 }
1345#endif
1346
1347#define array_free(stem, idx) \
1348 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
1349
1350/*****************************************************************************/
1351
1352/* dummy callback for pending events */
1353static void noinline
1354pendingcb (EV_P_ ev_prepare *w, int revents)
1355{
1356}
1357
1358void noinline
1359ev_feed_event (EV_P_ void *w, int revents)
1360{
1361 W w_ = (W)w;
1362 int pri = ABSPRI (w_);
1363
1364 if (expect_false (w_->pending))
1365 pendings [pri][w_->pending - 1].events |= revents;
1366 else
1367 {
162 w->pending = ++pendingcnt; 1368 w_->pending = ++pendingcnt [pri];
163 array_needsize (pendings, pendingmax, pendingcnt, ); 1369 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
164 pendings [pendingcnt - 1].w = w; 1370 pendings [pri][w_->pending - 1].w = w_;
165 pendings [pendingcnt - 1].events = events; 1371 pendings [pri][w_->pending - 1].events = revents;
166 } 1372 }
167} 1373}
168 1374
169static void 1375inline_speed void
1376feed_reverse (EV_P_ W w)
1377{
1378 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1379 rfeeds [rfeedcnt++] = w;
1380}
1381
1382inline_size void
1383feed_reverse_done (EV_P_ int revents)
1384{
1385 do
1386 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1387 while (rfeedcnt);
1388}
1389
1390inline_speed void
1391queue_events (EV_P_ W *events, int eventcnt, int type)
1392{
1393 int i;
1394
1395 for (i = 0; i < eventcnt; ++i)
1396 ev_feed_event (EV_A_ events [i], type);
1397}
1398
1399/*****************************************************************************/
1400
1401inline_speed void
170fd_event (int fd, int events) 1402fd_event_nocheck (EV_P_ int fd, int revents)
171{ 1403{
172 ANFD *anfd = anfds + fd; 1404 ANFD *anfd = anfds + fd;
173 struct ev_io *w; 1405 ev_io *w;
174 1406
175 for (w = anfd->head; w; w = w->next) 1407 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
176 { 1408 {
177 int ev = w->events & events; 1409 int ev = w->events & revents;
178 1410
179 if (ev) 1411 if (ev)
180 event ((W)w, ev); 1412 ev_feed_event (EV_A_ (W)w, ev);
181 } 1413 }
182} 1414}
183 1415
184static void 1416/* do not submit kernel events for fds that have reify set */
185queue_events (W *events, int eventcnt, int type) 1417/* because that means they changed while we were polling for new events */
1418inline_speed void
1419fd_event (EV_P_ int fd, int revents)
1420{
1421 ANFD *anfd = anfds + fd;
1422
1423 if (expect_true (!anfd->reify))
1424 fd_event_nocheck (EV_A_ fd, revents);
1425}
1426
1427void
1428ev_feed_fd_event (EV_P_ int fd, int revents)
1429{
1430 if (fd >= 0 && fd < anfdmax)
1431 fd_event_nocheck (EV_A_ fd, revents);
1432}
1433
1434/* make sure the external fd watch events are in-sync */
1435/* with the kernel/libev internal state */
1436inline_size void
1437fd_reify (EV_P)
186{ 1438{
187 int i; 1439 int i;
188 1440
189 for (i = 0; i < eventcnt; ++i) 1441#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
190 event (events [i], type);
191}
192
193/*****************************************************************************/
194
195static struct ev_timer **timers;
196static int timermax, timercnt;
197
198static struct ev_periodic **periodics;
199static int periodicmax, periodiccnt;
200
201static void
202upheap (WT *timers, int k)
203{
204 WT w = timers [k];
205
206 while (k && timers [k >> 1]->at > w->at)
207 {
208 timers [k] = timers [k >> 1];
209 timers [k]->active = k + 1;
210 k >>= 1;
211 }
212
213 timers [k] = w;
214 timers [k]->active = k + 1;
215
216}
217
218static void
219downheap (WT *timers, int N, int k)
220{
221 WT w = timers [k];
222
223 while (k < (N >> 1))
224 {
225 int j = k << 1;
226
227 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
228 ++j;
229
230 if (w->at <= timers [j]->at)
231 break;
232
233 timers [k] = timers [j];
234 timers [k]->active = k + 1;
235 k = j;
236 }
237
238 timers [k] = w;
239 timers [k]->active = k + 1;
240}
241
242/*****************************************************************************/
243
244typedef struct
245{
246 struct ev_signal *head;
247 sig_atomic_t gotsig;
248} ANSIG;
249
250static ANSIG *signals;
251static int signalmax;
252
253static int sigpipe [2];
254static sig_atomic_t gotsig;
255static struct ev_io sigev;
256
257static void
258signals_init (ANSIG *base, int count)
259{
260 while (count--)
261 {
262 base->head = 0;
263 base->gotsig = 0;
264 ++base;
265 }
266}
267
268static void
269sighandler (int signum)
270{
271 signals [signum - 1].gotsig = 1;
272
273 if (!gotsig)
274 {
275 gotsig = 1;
276 write (sigpipe [1], &gotsig, 1);
277 }
278}
279
280static void
281sigcb (struct ev_io *iow, int revents)
282{
283 struct ev_signal *w;
284 int sig;
285
286 gotsig = 0;
287 read (sigpipe [0], &revents, 1);
288
289 for (sig = signalmax; sig--; )
290 if (signals [sig].gotsig)
291 {
292 signals [sig].gotsig = 0;
293
294 for (w = signals [sig].head; w; w = w->next)
295 event ((W)w, EV_SIGNAL);
296 }
297}
298
299static void
300siginit (void)
301{
302 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
303 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
304
305 /* rather than sort out wether we really need nb, set it */
306 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
307 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
308
309 evio_set (&sigev, sigpipe [0], EV_READ);
310 evio_start (&sigev);
311}
312
313/*****************************************************************************/
314
315static struct ev_idle **idles;
316static int idlemax, idlecnt;
317
318static struct ev_check **checks;
319static int checkmax, checkcnt;
320
321/*****************************************************************************/
322
323#if HAVE_EPOLL
324# include "ev_epoll.c"
325#endif
326#if HAVE_SELECT
327# include "ev_select.c"
328#endif
329
330int ev_init (int flags)
331{
332#if HAVE_MONOTONIC
333 {
334 struct timespec ts;
335 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
336 have_monotonic = 1;
337 }
338#endif
339
340 ev_now = ev_time ();
341 now = get_clock ();
342 diff = ev_now - now;
343
344 if (pipe (sigpipe))
345 return 0;
346
347 ev_method = EVMETHOD_NONE;
348#if HAVE_EPOLL
349 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
350#endif
351#if HAVE_SELECT
352 if (ev_method == EVMETHOD_NONE) select_init (flags);
353#endif
354
355 if (ev_method)
356 {
357 evw_init (&sigev, sigcb);
358 siginit ();
359 }
360
361 return ev_method;
362}
363
364/*****************************************************************************/
365
366void ev_prefork (void)
367{
368 /* nop */
369}
370
371void ev_postfork_parent (void)
372{
373 /* nop */
374}
375
376void ev_postfork_child (void)
377{
378#if HAVE_EPOLL
379 if (ev_method == EVMETHOD_EPOLL)
380 epoll_postfork_child ();
381#endif
382
383 evio_stop (&sigev);
384 close (sigpipe [0]);
385 close (sigpipe [1]);
386 pipe (sigpipe);
387 siginit ();
388}
389
390/*****************************************************************************/
391
392static void
393fd_reify (void)
394{
395 int i;
396
397 for (i = 0; i < fdchangecnt; ++i) 1442 for (i = 0; i < fdchangecnt; ++i)
398 { 1443 {
399 int fd = fdchanges [i]; 1444 int fd = fdchanges [i];
400 ANFD *anfd = anfds + fd; 1445 ANFD *anfd = anfds + fd;
401 struct ev_io *w;
402 1446
403 int wev = 0; 1447 if (anfd->reify & EV__IOFDSET && anfd->head)
404
405 for (w = anfd->head; w; w = w->next)
406 wev |= w->events;
407
408 if (anfd->wev != wev)
409 { 1448 {
410 method_modify (fd, anfd->wev, wev); 1449 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1450
1451 if (handle != anfd->handle)
1452 {
1453 unsigned long arg;
1454
1455 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1456
1457 /* handle changed, but fd didn't - we need to do it in two steps */
1458 backend_modify (EV_A_ fd, anfd->events, 0);
411 anfd->wev = wev; 1459 anfd->events = 0;
1460 anfd->handle = handle;
1461 }
412 } 1462 }
413 } 1463 }
1464#endif
1465
1466 for (i = 0; i < fdchangecnt; ++i)
1467 {
1468 int fd = fdchanges [i];
1469 ANFD *anfd = anfds + fd;
1470 ev_io *w;
1471
1472 unsigned char o_events = anfd->events;
1473 unsigned char o_reify = anfd->reify;
1474
1475 anfd->reify = 0;
1476
1477 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1478 {
1479 anfd->events = 0;
1480
1481 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1482 anfd->events |= (unsigned char)w->events;
1483
1484 if (o_events != anfd->events)
1485 o_reify = EV__IOFDSET; /* actually |= */
1486 }
1487
1488 if (o_reify & EV__IOFDSET)
1489 backend_modify (EV_A_ fd, o_events, anfd->events);
1490 }
414 1491
415 fdchangecnt = 0; 1492 fdchangecnt = 0;
416} 1493}
417 1494
1495/* something about the given fd changed */
1496inline_size void
1497fd_change (EV_P_ int fd, int flags)
1498{
1499 unsigned char reify = anfds [fd].reify;
1500 anfds [fd].reify |= flags;
1501
1502 if (expect_true (!reify))
1503 {
1504 ++fdchangecnt;
1505 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
1506 fdchanges [fdchangecnt - 1] = fd;
1507 }
1508}
1509
1510/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1511inline_speed void ecb_cold
1512fd_kill (EV_P_ int fd)
1513{
1514 ev_io *w;
1515
1516 while ((w = (ev_io *)anfds [fd].head))
1517 {
1518 ev_io_stop (EV_A_ w);
1519 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1520 }
1521}
1522
1523/* check whether the given fd is actually valid, for error recovery */
1524inline_size int ecb_cold
1525fd_valid (int fd)
1526{
1527#ifdef _WIN32
1528 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1529#else
1530 return fcntl (fd, F_GETFD) != -1;
1531#endif
1532}
1533
1534/* called on EBADF to verify fds */
1535static void noinline ecb_cold
1536fd_ebadf (EV_P)
1537{
1538 int fd;
1539
1540 for (fd = 0; fd < anfdmax; ++fd)
1541 if (anfds [fd].events)
1542 if (!fd_valid (fd) && errno == EBADF)
1543 fd_kill (EV_A_ fd);
1544}
1545
1546/* called on ENOMEM in select/poll to kill some fds and retry */
1547static void noinline ecb_cold
1548fd_enomem (EV_P)
1549{
1550 int fd;
1551
1552 for (fd = anfdmax; fd--; )
1553 if (anfds [fd].events)
1554 {
1555 fd_kill (EV_A_ fd);
1556 break;
1557 }
1558}
1559
1560/* usually called after fork if backend needs to re-arm all fds from scratch */
1561static void noinline
1562fd_rearm_all (EV_P)
1563{
1564 int fd;
1565
1566 for (fd = 0; fd < anfdmax; ++fd)
1567 if (anfds [fd].events)
1568 {
1569 anfds [fd].events = 0;
1570 anfds [fd].emask = 0;
1571 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1572 }
1573}
1574
1575/* used to prepare libev internal fd's */
1576/* this is not fork-safe */
1577inline_speed void
1578fd_intern (int fd)
1579{
1580#ifdef _WIN32
1581 unsigned long arg = 1;
1582 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1583#else
1584 fcntl (fd, F_SETFD, FD_CLOEXEC);
1585 fcntl (fd, F_SETFL, O_NONBLOCK);
1586#endif
1587}
1588
1589/*****************************************************************************/
1590
1591/*
1592 * the heap functions want a real array index. array index 0 is guaranteed to not
1593 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1594 * the branching factor of the d-tree.
1595 */
1596
1597/*
1598 * at the moment we allow libev the luxury of two heaps,
1599 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1600 * which is more cache-efficient.
1601 * the difference is about 5% with 50000+ watchers.
1602 */
1603#if EV_USE_4HEAP
1604
1605#define DHEAP 4
1606#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1607#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1608#define UPHEAP_DONE(p,k) ((p) == (k))
1609
1610/* away from the root */
1611inline_speed void
1612downheap (ANHE *heap, int N, int k)
1613{
1614 ANHE he = heap [k];
1615 ANHE *E = heap + N + HEAP0;
1616
1617 for (;;)
1618 {
1619 ev_tstamp minat;
1620 ANHE *minpos;
1621 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1622
1623 /* find minimum child */
1624 if (expect_true (pos + DHEAP - 1 < E))
1625 {
1626 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1627 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1628 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1629 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1630 }
1631 else if (pos < E)
1632 {
1633 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1634 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1635 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1636 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1637 }
1638 else
1639 break;
1640
1641 if (ANHE_at (he) <= minat)
1642 break;
1643
1644 heap [k] = *minpos;
1645 ev_active (ANHE_w (*minpos)) = k;
1646
1647 k = minpos - heap;
1648 }
1649
1650 heap [k] = he;
1651 ev_active (ANHE_w (he)) = k;
1652}
1653
1654#else /* 4HEAP */
1655
1656#define HEAP0 1
1657#define HPARENT(k) ((k) >> 1)
1658#define UPHEAP_DONE(p,k) (!(p))
1659
1660/* away from the root */
1661inline_speed void
1662downheap (ANHE *heap, int N, int k)
1663{
1664 ANHE he = heap [k];
1665
1666 for (;;)
1667 {
1668 int c = k << 1;
1669
1670 if (c >= N + HEAP0)
1671 break;
1672
1673 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1674 ? 1 : 0;
1675
1676 if (ANHE_at (he) <= ANHE_at (heap [c]))
1677 break;
1678
1679 heap [k] = heap [c];
1680 ev_active (ANHE_w (heap [k])) = k;
1681
1682 k = c;
1683 }
1684
1685 heap [k] = he;
1686 ev_active (ANHE_w (he)) = k;
1687}
1688#endif
1689
1690/* towards the root */
1691inline_speed void
1692upheap (ANHE *heap, int k)
1693{
1694 ANHE he = heap [k];
1695
1696 for (;;)
1697 {
1698 int p = HPARENT (k);
1699
1700 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1701 break;
1702
1703 heap [k] = heap [p];
1704 ev_active (ANHE_w (heap [k])) = k;
1705 k = p;
1706 }
1707
1708 heap [k] = he;
1709 ev_active (ANHE_w (he)) = k;
1710}
1711
1712/* move an element suitably so it is in a correct place */
1713inline_size void
1714adjustheap (ANHE *heap, int N, int k)
1715{
1716 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1717 upheap (heap, k);
1718 else
1719 downheap (heap, N, k);
1720}
1721
1722/* rebuild the heap: this function is used only once and executed rarely */
1723inline_size void
1724reheap (ANHE *heap, int N)
1725{
1726 int i;
1727
1728 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1729 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1730 for (i = 0; i < N; ++i)
1731 upheap (heap, i + HEAP0);
1732}
1733
1734/*****************************************************************************/
1735
1736/* associate signal watchers to a signal signal */
1737typedef struct
1738{
1739 EV_ATOMIC_T pending;
1740#if EV_MULTIPLICITY
1741 EV_P;
1742#endif
1743 WL head;
1744} ANSIG;
1745
1746static ANSIG signals [EV_NSIG - 1];
1747
1748/*****************************************************************************/
1749
1750#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1751
1752static void noinline ecb_cold
1753evpipe_init (EV_P)
1754{
1755 if (!ev_is_active (&pipe_w))
1756 {
1757# if EV_USE_EVENTFD
1758 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1759 if (evfd < 0 && errno == EINVAL)
1760 evfd = eventfd (0, 0);
1761
1762 if (evfd >= 0)
1763 {
1764 evpipe [0] = -1;
1765 fd_intern (evfd); /* doing it twice doesn't hurt */
1766 ev_io_set (&pipe_w, evfd, EV_READ);
1767 }
1768 else
1769# endif
1770 {
1771 while (pipe (evpipe))
1772 ev_syserr ("(libev) error creating signal/async pipe");
1773
1774 fd_intern (evpipe [0]);
1775 fd_intern (evpipe [1]);
1776 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1777 }
1778
1779 ev_io_start (EV_A_ &pipe_w);
1780 ev_unref (EV_A); /* watcher should not keep loop alive */
1781 }
1782}
1783
1784inline_speed void
1785evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1786{
1787 if (expect_true (*flag))
1788 return;
1789
1790 *flag = 1;
1791
1792 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1793
1794 pipe_write_skipped = 1;
1795
1796 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1797
1798 if (pipe_write_wanted)
1799 {
1800 int old_errno;
1801
1802 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1803
1804 old_errno = errno; /* save errno because write will clobber it */
1805
1806#if EV_USE_EVENTFD
1807 if (evfd >= 0)
1808 {
1809 uint64_t counter = 1;
1810 write (evfd, &counter, sizeof (uint64_t));
1811 }
1812 else
1813#endif
1814 {
1815 /* win32 people keep sending patches that change this write() to send() */
1816 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1817 /* so when you think this write should be a send instead, please find out */
1818 /* where your send() is from - it's definitely not the microsoft send, and */
1819 /* tell me. thank you. */
1820 write (evpipe [1], &(evpipe [1]), 1);
1821 }
1822
1823 errno = old_errno;
1824 }
1825}
1826
1827/* called whenever the libev signal pipe */
1828/* got some events (signal, async) */
418static void 1829static void
419call_pending () 1830pipecb (EV_P_ ev_io *iow, int revents)
420{ 1831{
421 int i; 1832 int i;
422 1833
423 for (i = 0; i < pendingcnt; ++i) 1834 if (revents & EV_READ)
424 { 1835 {
425 ANPENDING *p = pendings + i; 1836#if EV_USE_EVENTFD
426 1837 if (evfd >= 0)
427 if (p->w)
428 { 1838 {
429 p->w->pending = 0; 1839 uint64_t counter;
430 p->w->cb (p->w, p->events); 1840 read (evfd, &counter, sizeof (uint64_t));
431 } 1841 }
1842 else
1843#endif
1844 {
1845 char dummy;
1846 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1847 read (evpipe [0], &dummy, 1);
1848 }
1849 }
1850
1851 pipe_write_skipped = 0;
1852
1853#if EV_SIGNAL_ENABLE
1854 if (sig_pending)
432 } 1855 {
1856 sig_pending = 0;
433 1857
434 pendingcnt = 0; 1858 for (i = EV_NSIG - 1; i--; )
1859 if (expect_false (signals [i].pending))
1860 ev_feed_signal_event (EV_A_ i + 1);
1861 }
1862#endif
1863
1864#if EV_ASYNC_ENABLE
1865 if (async_pending)
1866 {
1867 async_pending = 0;
1868
1869 for (i = asynccnt; i--; )
1870 if (asyncs [i]->sent)
1871 {
1872 asyncs [i]->sent = 0;
1873 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1874 }
1875 }
1876#endif
1877}
1878
1879/*****************************************************************************/
1880
1881void
1882ev_feed_signal (int signum)
1883{
1884#if EV_MULTIPLICITY
1885 EV_P = signals [signum - 1].loop;
1886
1887 if (!EV_A)
1888 return;
1889#endif
1890
1891 if (!ev_active (&pipe_w))
1892 return;
1893
1894 signals [signum - 1].pending = 1;
1895 evpipe_write (EV_A_ &sig_pending);
435} 1896}
436 1897
437static void 1898static void
1899ev_sighandler (int signum)
1900{
1901#ifdef _WIN32
1902 signal (signum, ev_sighandler);
1903#endif
1904
1905 ev_feed_signal (signum);
1906}
1907
1908void noinline
1909ev_feed_signal_event (EV_P_ int signum)
1910{
1911 WL w;
1912
1913 if (expect_false (signum <= 0 || signum > EV_NSIG))
1914 return;
1915
1916 --signum;
1917
1918#if EV_MULTIPLICITY
1919 /* it is permissible to try to feed a signal to the wrong loop */
1920 /* or, likely more useful, feeding a signal nobody is waiting for */
1921
1922 if (expect_false (signals [signum].loop != EV_A))
1923 return;
1924#endif
1925
1926 signals [signum].pending = 0;
1927
1928 for (w = signals [signum].head; w; w = w->next)
1929 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1930}
1931
1932#if EV_USE_SIGNALFD
1933static void
1934sigfdcb (EV_P_ ev_io *iow, int revents)
1935{
1936 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1937
1938 for (;;)
1939 {
1940 ssize_t res = read (sigfd, si, sizeof (si));
1941
1942 /* not ISO-C, as res might be -1, but works with SuS */
1943 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1944 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1945
1946 if (res < (ssize_t)sizeof (si))
1947 break;
1948 }
1949}
1950#endif
1951
1952#endif
1953
1954/*****************************************************************************/
1955
1956#if EV_CHILD_ENABLE
1957static WL childs [EV_PID_HASHSIZE];
1958
1959static ev_signal childev;
1960
1961#ifndef WIFCONTINUED
1962# define WIFCONTINUED(status) 0
1963#endif
1964
1965/* handle a single child status event */
1966inline_speed void
1967child_reap (EV_P_ int chain, int pid, int status)
1968{
1969 ev_child *w;
1970 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1971
1972 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1973 {
1974 if ((w->pid == pid || !w->pid)
1975 && (!traced || (w->flags & 1)))
1976 {
1977 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1978 w->rpid = pid;
1979 w->rstatus = status;
1980 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1981 }
1982 }
1983}
1984
1985#ifndef WCONTINUED
1986# define WCONTINUED 0
1987#endif
1988
1989/* called on sigchld etc., calls waitpid */
1990static void
1991childcb (EV_P_ ev_signal *sw, int revents)
1992{
1993 int pid, status;
1994
1995 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1996 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1997 if (!WCONTINUED
1998 || errno != EINVAL
1999 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
2000 return;
2001
2002 /* make sure we are called again until all children have been reaped */
2003 /* we need to do it this way so that the callback gets called before we continue */
2004 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
2005
2006 child_reap (EV_A_ pid, pid, status);
2007 if ((EV_PID_HASHSIZE) > 1)
2008 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
2009}
2010
2011#endif
2012
2013/*****************************************************************************/
2014
2015#if EV_USE_IOCP
2016# include "ev_iocp.c"
2017#endif
2018#if EV_USE_PORT
2019# include "ev_port.c"
2020#endif
2021#if EV_USE_KQUEUE
2022# include "ev_kqueue.c"
2023#endif
2024#if EV_USE_EPOLL
2025# include "ev_epoll.c"
2026#endif
2027#if EV_USE_POLL
2028# include "ev_poll.c"
2029#endif
2030#if EV_USE_SELECT
2031# include "ev_select.c"
2032#endif
2033
2034int ecb_cold
2035ev_version_major (void)
2036{
2037 return EV_VERSION_MAJOR;
2038}
2039
2040int ecb_cold
2041ev_version_minor (void)
2042{
2043 return EV_VERSION_MINOR;
2044}
2045
2046/* return true if we are running with elevated privileges and should ignore env variables */
2047int inline_size ecb_cold
2048enable_secure (void)
2049{
2050#ifdef _WIN32
2051 return 0;
2052#else
2053 return getuid () != geteuid ()
2054 || getgid () != getegid ();
2055#endif
2056}
2057
2058unsigned int ecb_cold
2059ev_supported_backends (void)
2060{
2061 unsigned int flags = 0;
2062
2063 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2064 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
2065 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2066 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2067 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2068
2069 return flags;
2070}
2071
2072unsigned int ecb_cold
2073ev_recommended_backends (void)
2074{
2075 unsigned int flags = ev_supported_backends ();
2076
2077#ifndef __NetBSD__
2078 /* kqueue is borked on everything but netbsd apparently */
2079 /* it usually doesn't work correctly on anything but sockets and pipes */
2080 flags &= ~EVBACKEND_KQUEUE;
2081#endif
2082#ifdef __APPLE__
2083 /* only select works correctly on that "unix-certified" platform */
2084 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2085 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2086#endif
2087#ifdef __FreeBSD__
2088 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2089#endif
2090
2091 return flags;
2092}
2093
2094unsigned int ecb_cold
2095ev_embeddable_backends (void)
2096{
2097 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2098
2099 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2100 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2101 flags &= ~EVBACKEND_EPOLL;
2102
2103 return flags;
2104}
2105
2106unsigned int
2107ev_backend (EV_P)
2108{
2109 return backend;
2110}
2111
2112#if EV_FEATURE_API
2113unsigned int
2114ev_iteration (EV_P)
2115{
2116 return loop_count;
2117}
2118
2119unsigned int
2120ev_depth (EV_P)
2121{
2122 return loop_depth;
2123}
2124
2125void
2126ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
2127{
2128 io_blocktime = interval;
2129}
2130
2131void
2132ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
2133{
2134 timeout_blocktime = interval;
2135}
2136
2137void
2138ev_set_userdata (EV_P_ void *data)
2139{
2140 userdata = data;
2141}
2142
2143void *
2144ev_userdata (EV_P)
2145{
2146 return userdata;
2147}
2148
2149void
2150ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
2151{
2152 invoke_cb = invoke_pending_cb;
2153}
2154
2155void
2156ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
2157{
2158 release_cb = release;
2159 acquire_cb = acquire;
2160}
2161#endif
2162
2163/* initialise a loop structure, must be zero-initialised */
2164static void noinline ecb_cold
2165loop_init (EV_P_ unsigned int flags)
2166{
2167 if (!backend)
2168 {
2169 origflags = flags;
2170
2171#if EV_USE_REALTIME
2172 if (!have_realtime)
2173 {
2174 struct timespec ts;
2175
2176 if (!clock_gettime (CLOCK_REALTIME, &ts))
2177 have_realtime = 1;
2178 }
2179#endif
2180
2181#if EV_USE_MONOTONIC
2182 if (!have_monotonic)
2183 {
2184 struct timespec ts;
2185
2186 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
2187 have_monotonic = 1;
2188 }
2189#endif
2190
2191 /* pid check not overridable via env */
2192#ifndef _WIN32
2193 if (flags & EVFLAG_FORKCHECK)
2194 curpid = getpid ();
2195#endif
2196
2197 if (!(flags & EVFLAG_NOENV)
2198 && !enable_secure ()
2199 && getenv ("LIBEV_FLAGS"))
2200 flags = atoi (getenv ("LIBEV_FLAGS"));
2201
2202 ev_rt_now = ev_time ();
2203 mn_now = get_clock ();
2204 now_floor = mn_now;
2205 rtmn_diff = ev_rt_now - mn_now;
2206#if EV_FEATURE_API
2207 invoke_cb = ev_invoke_pending;
2208#endif
2209
2210 io_blocktime = 0.;
2211 timeout_blocktime = 0.;
2212 backend = 0;
2213 backend_fd = -1;
2214 sig_pending = 0;
2215#if EV_ASYNC_ENABLE
2216 async_pending = 0;
2217#endif
2218 pipe_write_skipped = 0;
2219 pipe_write_wanted = 0;
2220#if EV_USE_INOTIFY
2221 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2222#endif
2223#if EV_USE_SIGNALFD
2224 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2225#endif
2226
2227 if (!(flags & EVBACKEND_MASK))
2228 flags |= ev_recommended_backends ();
2229
2230#if EV_USE_IOCP
2231 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2232#endif
2233#if EV_USE_PORT
2234 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
2235#endif
2236#if EV_USE_KQUEUE
2237 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
2238#endif
2239#if EV_USE_EPOLL
2240 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
2241#endif
2242#if EV_USE_POLL
2243 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
2244#endif
2245#if EV_USE_SELECT
2246 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
2247#endif
2248
2249 ev_prepare_init (&pending_w, pendingcb);
2250
2251#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2252 ev_init (&pipe_w, pipecb);
2253 ev_set_priority (&pipe_w, EV_MAXPRI);
2254#endif
2255 }
2256}
2257
2258/* free up a loop structure */
2259void ecb_cold
2260ev_loop_destroy (EV_P)
2261{
2262 int i;
2263
2264#if EV_MULTIPLICITY
2265 /* mimic free (0) */
2266 if (!EV_A)
2267 return;
2268#endif
2269
2270#if EV_CLEANUP_ENABLE
2271 /* queue cleanup watchers (and execute them) */
2272 if (expect_false (cleanupcnt))
2273 {
2274 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2275 EV_INVOKE_PENDING;
2276 }
2277#endif
2278
2279#if EV_CHILD_ENABLE
2280 if (ev_is_active (&childev))
2281 {
2282 ev_ref (EV_A); /* child watcher */
2283 ev_signal_stop (EV_A_ &childev);
2284 }
2285#endif
2286
2287 if (ev_is_active (&pipe_w))
2288 {
2289 /*ev_ref (EV_A);*/
2290 /*ev_io_stop (EV_A_ &pipe_w);*/
2291
2292#if EV_USE_EVENTFD
2293 if (evfd >= 0)
2294 close (evfd);
2295#endif
2296
2297 if (evpipe [0] >= 0)
2298 {
2299 EV_WIN32_CLOSE_FD (evpipe [0]);
2300 EV_WIN32_CLOSE_FD (evpipe [1]);
2301 }
2302 }
2303
2304#if EV_USE_SIGNALFD
2305 if (ev_is_active (&sigfd_w))
2306 close (sigfd);
2307#endif
2308
2309#if EV_USE_INOTIFY
2310 if (fs_fd >= 0)
2311 close (fs_fd);
2312#endif
2313
2314 if (backend_fd >= 0)
2315 close (backend_fd);
2316
2317#if EV_USE_IOCP
2318 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2319#endif
2320#if EV_USE_PORT
2321 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
2322#endif
2323#if EV_USE_KQUEUE
2324 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
2325#endif
2326#if EV_USE_EPOLL
2327 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
2328#endif
2329#if EV_USE_POLL
2330 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
2331#endif
2332#if EV_USE_SELECT
2333 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
2334#endif
2335
2336 for (i = NUMPRI; i--; )
2337 {
2338 array_free (pending, [i]);
2339#if EV_IDLE_ENABLE
2340 array_free (idle, [i]);
2341#endif
2342 }
2343
2344 ev_free (anfds); anfds = 0; anfdmax = 0;
2345
2346 /* have to use the microsoft-never-gets-it-right macro */
2347 array_free (rfeed, EMPTY);
2348 array_free (fdchange, EMPTY);
2349 array_free (timer, EMPTY);
2350#if EV_PERIODIC_ENABLE
2351 array_free (periodic, EMPTY);
2352#endif
2353#if EV_FORK_ENABLE
2354 array_free (fork, EMPTY);
2355#endif
2356#if EV_CLEANUP_ENABLE
2357 array_free (cleanup, EMPTY);
2358#endif
2359 array_free (prepare, EMPTY);
2360 array_free (check, EMPTY);
2361#if EV_ASYNC_ENABLE
2362 array_free (async, EMPTY);
2363#endif
2364
2365 backend = 0;
2366
2367#if EV_MULTIPLICITY
2368 if (ev_is_default_loop (EV_A))
2369#endif
2370 ev_default_loop_ptr = 0;
2371#if EV_MULTIPLICITY
2372 else
2373 ev_free (EV_A);
2374#endif
2375}
2376
2377#if EV_USE_INOTIFY
2378inline_size void infy_fork (EV_P);
2379#endif
2380
2381inline_size void
2382loop_fork (EV_P)
2383{
2384#if EV_USE_PORT
2385 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2386#endif
2387#if EV_USE_KQUEUE
2388 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
2389#endif
2390#if EV_USE_EPOLL
2391 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
2392#endif
2393#if EV_USE_INOTIFY
2394 infy_fork (EV_A);
2395#endif
2396
2397 if (ev_is_active (&pipe_w))
2398 {
2399 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2400
2401 ev_ref (EV_A);
2402 ev_io_stop (EV_A_ &pipe_w);
2403
2404#if EV_USE_EVENTFD
2405 if (evfd >= 0)
2406 close (evfd);
2407#endif
2408
2409 if (evpipe [0] >= 0)
2410 {
2411 EV_WIN32_CLOSE_FD (evpipe [0]);
2412 EV_WIN32_CLOSE_FD (evpipe [1]);
2413 }
2414
2415#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2416 evpipe_init (EV_A);
2417 /* now iterate over everything, in case we missed something */
2418 pipecb (EV_A_ &pipe_w, EV_READ);
2419#endif
2420 }
2421
2422 postfork = 0;
2423}
2424
2425#if EV_MULTIPLICITY
2426
2427struct ev_loop * ecb_cold
2428ev_loop_new (unsigned int flags)
2429{
2430 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2431
2432 memset (EV_A, 0, sizeof (struct ev_loop));
2433 loop_init (EV_A_ flags);
2434
2435 if (ev_backend (EV_A))
2436 return EV_A;
2437
2438 ev_free (EV_A);
2439 return 0;
2440}
2441
2442#endif /* multiplicity */
2443
2444#if EV_VERIFY
2445static void noinline ecb_cold
2446verify_watcher (EV_P_ W w)
2447{
2448 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2449
2450 if (w->pending)
2451 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2452}
2453
2454static void noinline ecb_cold
2455verify_heap (EV_P_ ANHE *heap, int N)
2456{
2457 int i;
2458
2459 for (i = HEAP0; i < N + HEAP0; ++i)
2460 {
2461 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2462 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2463 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2464
2465 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2466 }
2467}
2468
2469static void noinline ecb_cold
2470array_verify (EV_P_ W *ws, int cnt)
2471{
2472 while (cnt--)
2473 {
2474 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2475 verify_watcher (EV_A_ ws [cnt]);
2476 }
2477}
2478#endif
2479
2480#if EV_FEATURE_API
2481void ecb_cold
2482ev_verify (EV_P)
2483{
2484#if EV_VERIFY
2485 int i;
2486 WL w;
2487
2488 assert (activecnt >= -1);
2489
2490 assert (fdchangemax >= fdchangecnt);
2491 for (i = 0; i < fdchangecnt; ++i)
2492 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2493
2494 assert (anfdmax >= 0);
2495 for (i = 0; i < anfdmax; ++i)
2496 for (w = anfds [i].head; w; w = w->next)
2497 {
2498 verify_watcher (EV_A_ (W)w);
2499 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2500 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2501 }
2502
2503 assert (timermax >= timercnt);
2504 verify_heap (EV_A_ timers, timercnt);
2505
2506#if EV_PERIODIC_ENABLE
2507 assert (periodicmax >= periodiccnt);
2508 verify_heap (EV_A_ periodics, periodiccnt);
2509#endif
2510
2511 for (i = NUMPRI; i--; )
2512 {
2513 assert (pendingmax [i] >= pendingcnt [i]);
2514#if EV_IDLE_ENABLE
2515 assert (idleall >= 0);
2516 assert (idlemax [i] >= idlecnt [i]);
2517 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2518#endif
2519 }
2520
2521#if EV_FORK_ENABLE
2522 assert (forkmax >= forkcnt);
2523 array_verify (EV_A_ (W *)forks, forkcnt);
2524#endif
2525
2526#if EV_CLEANUP_ENABLE
2527 assert (cleanupmax >= cleanupcnt);
2528 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2529#endif
2530
2531#if EV_ASYNC_ENABLE
2532 assert (asyncmax >= asynccnt);
2533 array_verify (EV_A_ (W *)asyncs, asynccnt);
2534#endif
2535
2536#if EV_PREPARE_ENABLE
2537 assert (preparemax >= preparecnt);
2538 array_verify (EV_A_ (W *)prepares, preparecnt);
2539#endif
2540
2541#if EV_CHECK_ENABLE
2542 assert (checkmax >= checkcnt);
2543 array_verify (EV_A_ (W *)checks, checkcnt);
2544#endif
2545
2546# if 0
2547#if EV_CHILD_ENABLE
2548 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2549 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2550#endif
2551# endif
2552#endif
2553}
2554#endif
2555
2556#if EV_MULTIPLICITY
2557struct ev_loop * ecb_cold
2558#else
2559int
2560#endif
2561ev_default_loop (unsigned int flags)
2562{
2563 if (!ev_default_loop_ptr)
2564 {
2565#if EV_MULTIPLICITY
2566 EV_P = ev_default_loop_ptr = &default_loop_struct;
2567#else
2568 ev_default_loop_ptr = 1;
2569#endif
2570
2571 loop_init (EV_A_ flags);
2572
2573 if (ev_backend (EV_A))
2574 {
2575#if EV_CHILD_ENABLE
2576 ev_signal_init (&childev, childcb, SIGCHLD);
2577 ev_set_priority (&childev, EV_MAXPRI);
2578 ev_signal_start (EV_A_ &childev);
2579 ev_unref (EV_A); /* child watcher should not keep loop alive */
2580#endif
2581 }
2582 else
2583 ev_default_loop_ptr = 0;
2584 }
2585
2586 return ev_default_loop_ptr;
2587}
2588
2589void
2590ev_loop_fork (EV_P)
2591{
2592 postfork = 1; /* must be in line with ev_default_fork */
2593}
2594
2595/*****************************************************************************/
2596
2597void
2598ev_invoke (EV_P_ void *w, int revents)
2599{
2600 EV_CB_INVOKE ((W)w, revents);
2601}
2602
2603unsigned int
2604ev_pending_count (EV_P)
2605{
2606 int pri;
2607 unsigned int count = 0;
2608
2609 for (pri = NUMPRI; pri--; )
2610 count += pendingcnt [pri];
2611
2612 return count;
2613}
2614
2615void noinline
2616ev_invoke_pending (EV_P)
2617{
2618 int pri;
2619
2620 for (pri = NUMPRI; pri--; )
2621 while (pendingcnt [pri])
2622 {
2623 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2624
2625 p->w->pending = 0;
2626 EV_CB_INVOKE (p->w, p->events);
2627 EV_FREQUENT_CHECK;
2628 }
2629}
2630
2631#if EV_IDLE_ENABLE
2632/* make idle watchers pending. this handles the "call-idle */
2633/* only when higher priorities are idle" logic */
2634inline_size void
2635idle_reify (EV_P)
2636{
2637 if (expect_false (idleall))
2638 {
2639 int pri;
2640
2641 for (pri = NUMPRI; pri--; )
2642 {
2643 if (pendingcnt [pri])
2644 break;
2645
2646 if (idlecnt [pri])
2647 {
2648 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2649 break;
2650 }
2651 }
2652 }
2653}
2654#endif
2655
2656/* make timers pending */
2657inline_size void
438timers_reify () 2658timers_reify (EV_P)
439{ 2659{
440 while (timercnt && timers [0]->at <= now) 2660 EV_FREQUENT_CHECK;
441 {
442 struct ev_timer *w = timers [0];
443 2661
444 event ((W)w, EV_TIMEOUT); 2662 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2663 {
2664 do
2665 {
2666 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
445 2667
2668 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2669
446 /* first reschedule or stop timer */ 2670 /* first reschedule or stop timer */
2671 if (w->repeat)
2672 {
2673 ev_at (w) += w->repeat;
2674 if (ev_at (w) < mn_now)
2675 ev_at (w) = mn_now;
2676
2677 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2678
2679 ANHE_at_cache (timers [HEAP0]);
2680 downheap (timers, timercnt, HEAP0);
2681 }
2682 else
2683 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2684
2685 EV_FREQUENT_CHECK;
2686 feed_reverse (EV_A_ (W)w);
2687 }
2688 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2689
2690 feed_reverse_done (EV_A_ EV_TIMER);
2691 }
2692}
2693
2694#if EV_PERIODIC_ENABLE
2695
2696static void noinline
2697periodic_recalc (EV_P_ ev_periodic *w)
2698{
2699 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2700 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2701
2702 /* the above almost always errs on the low side */
2703 while (at <= ev_rt_now)
2704 {
2705 ev_tstamp nat = at + w->interval;
2706
2707 /* when resolution fails us, we use ev_rt_now */
2708 if (expect_false (nat == at))
2709 {
2710 at = ev_rt_now;
2711 break;
2712 }
2713
2714 at = nat;
2715 }
2716
2717 ev_at (w) = at;
2718}
2719
2720/* make periodics pending */
2721inline_size void
2722periodics_reify (EV_P)
2723{
2724 EV_FREQUENT_CHECK;
2725
2726 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2727 {
2728 int feed_count = 0;
2729
2730 do
2731 {
2732 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2733
2734 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2735
2736 /* first reschedule or stop timer */
2737 if (w->reschedule_cb)
2738 {
2739 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2740
2741 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2742
2743 ANHE_at_cache (periodics [HEAP0]);
2744 downheap (periodics, periodiccnt, HEAP0);
2745 }
2746 else if (w->interval)
2747 {
2748 periodic_recalc (EV_A_ w);
2749 ANHE_at_cache (periodics [HEAP0]);
2750 downheap (periodics, periodiccnt, HEAP0);
2751 }
2752 else
2753 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2754
2755 EV_FREQUENT_CHECK;
2756 feed_reverse (EV_A_ (W)w);
2757 }
2758 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2759
2760 feed_reverse_done (EV_A_ EV_PERIODIC);
2761 }
2762}
2763
2764/* simply recalculate all periodics */
2765/* TODO: maybe ensure that at least one event happens when jumping forward? */
2766static void noinline ecb_cold
2767periodics_reschedule (EV_P)
2768{
2769 int i;
2770
2771 /* adjust periodics after time jump */
2772 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2773 {
2774 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2775
2776 if (w->reschedule_cb)
2777 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2778 else if (w->interval)
2779 periodic_recalc (EV_A_ w);
2780
2781 ANHE_at_cache (periodics [i]);
2782 }
2783
2784 reheap (periodics, periodiccnt);
2785}
2786#endif
2787
2788/* adjust all timers by a given offset */
2789static void noinline ecb_cold
2790timers_reschedule (EV_P_ ev_tstamp adjust)
2791{
2792 int i;
2793
2794 for (i = 0; i < timercnt; ++i)
2795 {
2796 ANHE *he = timers + i + HEAP0;
2797 ANHE_w (*he)->at += adjust;
2798 ANHE_at_cache (*he);
2799 }
2800}
2801
2802/* fetch new monotonic and realtime times from the kernel */
2803/* also detect if there was a timejump, and act accordingly */
2804inline_speed void
2805time_update (EV_P_ ev_tstamp max_block)
2806{
2807#if EV_USE_MONOTONIC
2808 if (expect_true (have_monotonic))
2809 {
2810 int i;
2811 ev_tstamp odiff = rtmn_diff;
2812
2813 mn_now = get_clock ();
2814
2815 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2816 /* interpolate in the meantime */
2817 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2818 {
2819 ev_rt_now = rtmn_diff + mn_now;
2820 return;
2821 }
2822
2823 now_floor = mn_now;
2824 ev_rt_now = ev_time ();
2825
2826 /* loop a few times, before making important decisions.
2827 * on the choice of "4": one iteration isn't enough,
2828 * in case we get preempted during the calls to
2829 * ev_time and get_clock. a second call is almost guaranteed
2830 * to succeed in that case, though. and looping a few more times
2831 * doesn't hurt either as we only do this on time-jumps or
2832 * in the unlikely event of having been preempted here.
2833 */
2834 for (i = 4; --i; )
2835 {
2836 ev_tstamp diff;
2837 rtmn_diff = ev_rt_now - mn_now;
2838
2839 diff = odiff - rtmn_diff;
2840
2841 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2842 return; /* all is well */
2843
2844 ev_rt_now = ev_time ();
2845 mn_now = get_clock ();
2846 now_floor = mn_now;
2847 }
2848
2849 /* no timer adjustment, as the monotonic clock doesn't jump */
2850 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2851# if EV_PERIODIC_ENABLE
2852 periodics_reschedule (EV_A);
2853# endif
2854 }
2855 else
2856#endif
2857 {
2858 ev_rt_now = ev_time ();
2859
2860 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2861 {
2862 /* adjust timers. this is easy, as the offset is the same for all of them */
2863 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2864#if EV_PERIODIC_ENABLE
2865 periodics_reschedule (EV_A);
2866#endif
2867 }
2868
2869 mn_now = ev_rt_now;
2870 }
2871}
2872
2873void
2874ev_run (EV_P_ int flags)
2875{
2876#if EV_FEATURE_API
2877 ++loop_depth;
2878#endif
2879
2880 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2881
2882 loop_done = EVBREAK_CANCEL;
2883
2884 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2885
2886 do
2887 {
2888#if EV_VERIFY >= 2
2889 ev_verify (EV_A);
2890#endif
2891
2892#ifndef _WIN32
2893 if (expect_false (curpid)) /* penalise the forking check even more */
2894 if (expect_false (getpid () != curpid))
2895 {
2896 curpid = getpid ();
2897 postfork = 1;
2898 }
2899#endif
2900
2901#if EV_FORK_ENABLE
2902 /* we might have forked, so queue fork handlers */
2903 if (expect_false (postfork))
2904 if (forkcnt)
2905 {
2906 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2907 EV_INVOKE_PENDING;
2908 }
2909#endif
2910
2911#if EV_PREPARE_ENABLE
2912 /* queue prepare watchers (and execute them) */
2913 if (expect_false (preparecnt))
2914 {
2915 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2916 EV_INVOKE_PENDING;
2917 }
2918#endif
2919
2920 if (expect_false (loop_done))
2921 break;
2922
2923 /* we might have forked, so reify kernel state if necessary */
2924 if (expect_false (postfork))
2925 loop_fork (EV_A);
2926
2927 /* update fd-related kernel structures */
2928 fd_reify (EV_A);
2929
2930 /* calculate blocking time */
2931 {
2932 ev_tstamp waittime = 0.;
2933 ev_tstamp sleeptime = 0.;
2934
2935 /* remember old timestamp for io_blocktime calculation */
2936 ev_tstamp prev_mn_now = mn_now;
2937
2938 /* update time to cancel out callback processing overhead */
2939 time_update (EV_A_ 1e100);
2940
2941 /* from now on, we want a pipe-wake-up */
2942 pipe_write_wanted = 1;
2943
2944 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
2945
2946 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2947 {
2948 waittime = MAX_BLOCKTIME;
2949
2950 if (timercnt)
2951 {
2952 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2953 if (waittime > to) waittime = to;
2954 }
2955
2956#if EV_PERIODIC_ENABLE
2957 if (periodiccnt)
2958 {
2959 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2960 if (waittime > to) waittime = to;
2961 }
2962#endif
2963
2964 /* don't let timeouts decrease the waittime below timeout_blocktime */
2965 if (expect_false (waittime < timeout_blocktime))
2966 waittime = timeout_blocktime;
2967
2968 /* at this point, we NEED to wait, so we have to ensure */
2969 /* to pass a minimum nonzero value to the backend */
2970 if (expect_false (waittime < backend_mintime))
2971 waittime = backend_mintime;
2972
2973 /* extra check because io_blocktime is commonly 0 */
2974 if (expect_false (io_blocktime))
2975 {
2976 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2977
2978 if (sleeptime > waittime - backend_mintime)
2979 sleeptime = waittime - backend_mintime;
2980
2981 if (expect_true (sleeptime > 0.))
2982 {
2983 ev_sleep (sleeptime);
2984 waittime -= sleeptime;
2985 }
2986 }
2987 }
2988
2989#if EV_FEATURE_API
2990 ++loop_count;
2991#endif
2992 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2993 backend_poll (EV_A_ waittime);
2994 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2995
2996 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
2997
2998 if (pipe_write_skipped)
2999 {
3000 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3001 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3002 }
3003
3004
3005 /* update ev_rt_now, do magic */
3006 time_update (EV_A_ waittime + sleeptime);
3007 }
3008
3009 /* queue pending timers and reschedule them */
3010 timers_reify (EV_A); /* relative timers called last */
3011#if EV_PERIODIC_ENABLE
3012 periodics_reify (EV_A); /* absolute timers called first */
3013#endif
3014
3015#if EV_IDLE_ENABLE
3016 /* queue idle watchers unless other events are pending */
3017 idle_reify (EV_A);
3018#endif
3019
3020#if EV_CHECK_ENABLE
3021 /* queue check watchers, to be executed first */
3022 if (expect_false (checkcnt))
3023 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3024#endif
3025
3026 EV_INVOKE_PENDING;
3027 }
3028 while (expect_true (
3029 activecnt
3030 && !loop_done
3031 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3032 ));
3033
3034 if (loop_done == EVBREAK_ONE)
3035 loop_done = EVBREAK_CANCEL;
3036
3037#if EV_FEATURE_API
3038 --loop_depth;
3039#endif
3040}
3041
3042void
3043ev_break (EV_P_ int how)
3044{
3045 loop_done = how;
3046}
3047
3048void
3049ev_ref (EV_P)
3050{
3051 ++activecnt;
3052}
3053
3054void
3055ev_unref (EV_P)
3056{
3057 --activecnt;
3058}
3059
3060void
3061ev_now_update (EV_P)
3062{
3063 time_update (EV_A_ 1e100);
3064}
3065
3066void
3067ev_suspend (EV_P)
3068{
3069 ev_now_update (EV_A);
3070}
3071
3072void
3073ev_resume (EV_P)
3074{
3075 ev_tstamp mn_prev = mn_now;
3076
3077 ev_now_update (EV_A);
3078 timers_reschedule (EV_A_ mn_now - mn_prev);
3079#if EV_PERIODIC_ENABLE
3080 /* TODO: really do this? */
3081 periodics_reschedule (EV_A);
3082#endif
3083}
3084
3085/*****************************************************************************/
3086/* singly-linked list management, used when the expected list length is short */
3087
3088inline_size void
3089wlist_add (WL *head, WL elem)
3090{
3091 elem->next = *head;
3092 *head = elem;
3093}
3094
3095inline_size void
3096wlist_del (WL *head, WL elem)
3097{
3098 while (*head)
3099 {
3100 if (expect_true (*head == elem))
3101 {
3102 *head = elem->next;
3103 break;
3104 }
3105
3106 head = &(*head)->next;
3107 }
3108}
3109
3110/* internal, faster, version of ev_clear_pending */
3111inline_speed void
3112clear_pending (EV_P_ W w)
3113{
3114 if (w->pending)
3115 {
3116 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
3117 w->pending = 0;
3118 }
3119}
3120
3121int
3122ev_clear_pending (EV_P_ void *w)
3123{
3124 W w_ = (W)w;
3125 int pending = w_->pending;
3126
3127 if (expect_true (pending))
3128 {
3129 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3130 p->w = (W)&pending_w;
3131 w_->pending = 0;
3132 return p->events;
3133 }
3134 else
3135 return 0;
3136}
3137
3138inline_size void
3139pri_adjust (EV_P_ W w)
3140{
3141 int pri = ev_priority (w);
3142 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3143 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3144 ev_set_priority (w, pri);
3145}
3146
3147inline_speed void
3148ev_start (EV_P_ W w, int active)
3149{
3150 pri_adjust (EV_A_ w);
3151 w->active = active;
3152 ev_ref (EV_A);
3153}
3154
3155inline_size void
3156ev_stop (EV_P_ W w)
3157{
3158 ev_unref (EV_A);
3159 w->active = 0;
3160}
3161
3162/*****************************************************************************/
3163
3164void noinline
3165ev_io_start (EV_P_ ev_io *w)
3166{
3167 int fd = w->fd;
3168
3169 if (expect_false (ev_is_active (w)))
3170 return;
3171
3172 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3173 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3174
3175 EV_FREQUENT_CHECK;
3176
3177 ev_start (EV_A_ (W)w, 1);
3178 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
3179 wlist_add (&anfds[fd].head, (WL)w);
3180
3181 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3182 w->events &= ~EV__IOFDSET;
3183
3184 EV_FREQUENT_CHECK;
3185}
3186
3187void noinline
3188ev_io_stop (EV_P_ ev_io *w)
3189{
3190 clear_pending (EV_A_ (W)w);
3191 if (expect_false (!ev_is_active (w)))
3192 return;
3193
3194 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3195
3196 EV_FREQUENT_CHECK;
3197
3198 wlist_del (&anfds[w->fd].head, (WL)w);
3199 ev_stop (EV_A_ (W)w);
3200
3201 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3202
3203 EV_FREQUENT_CHECK;
3204}
3205
3206void noinline
3207ev_timer_start (EV_P_ ev_timer *w)
3208{
3209 if (expect_false (ev_is_active (w)))
3210 return;
3211
3212 ev_at (w) += mn_now;
3213
3214 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
3215
3216 EV_FREQUENT_CHECK;
3217
3218 ++timercnt;
3219 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
3220 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
3221 ANHE_w (timers [ev_active (w)]) = (WT)w;
3222 ANHE_at_cache (timers [ev_active (w)]);
3223 upheap (timers, ev_active (w));
3224
3225 EV_FREQUENT_CHECK;
3226
3227 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
3228}
3229
3230void noinline
3231ev_timer_stop (EV_P_ ev_timer *w)
3232{
3233 clear_pending (EV_A_ (W)w);
3234 if (expect_false (!ev_is_active (w)))
3235 return;
3236
3237 EV_FREQUENT_CHECK;
3238
3239 {
3240 int active = ev_active (w);
3241
3242 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3243
3244 --timercnt;
3245
3246 if (expect_true (active < timercnt + HEAP0))
3247 {
3248 timers [active] = timers [timercnt + HEAP0];
3249 adjustheap (timers, timercnt, active);
3250 }
3251 }
3252
3253 ev_at (w) -= mn_now;
3254
3255 ev_stop (EV_A_ (W)w);
3256
3257 EV_FREQUENT_CHECK;
3258}
3259
3260void noinline
3261ev_timer_again (EV_P_ ev_timer *w)
3262{
3263 EV_FREQUENT_CHECK;
3264
3265 if (ev_is_active (w))
3266 {
447 if (w->repeat) 3267 if (w->repeat)
448 { 3268 {
449 w->at = now + w->repeat; 3269 ev_at (w) = mn_now + w->repeat;
450 assert (("timer timeout in the past, negative repeat?", w->at > now)); 3270 ANHE_at_cache (timers [ev_active (w)]);
451 downheap ((WT *)timers, timercnt, 0); 3271 adjustheap (timers, timercnt, ev_active (w));
452 } 3272 }
453 else 3273 else
454 evtimer_stop (w); /* nonrepeating: stop timer */ 3274 ev_timer_stop (EV_A_ w);
455 }
456}
457
458static void
459periodics_reify ()
460{
461 while (periodiccnt && periodics [0]->at <= ev_now)
462 { 3275 }
463 struct ev_periodic *w = periodics [0]; 3276 else if (w->repeat)
3277 {
3278 ev_at (w) = w->repeat;
3279 ev_timer_start (EV_A_ w);
3280 }
464 3281
465 /* first reschedule or stop timer */ 3282 EV_FREQUENT_CHECK;
3283}
3284
3285ev_tstamp
3286ev_timer_remaining (EV_P_ ev_timer *w)
3287{
3288 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3289}
3290
3291#if EV_PERIODIC_ENABLE
3292void noinline
3293ev_periodic_start (EV_P_ ev_periodic *w)
3294{
3295 if (expect_false (ev_is_active (w)))
3296 return;
3297
3298 if (w->reschedule_cb)
3299 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
466 if (w->interval) 3300 else if (w->interval)
3301 {
3302 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
3303 periodic_recalc (EV_A_ w);
3304 }
3305 else
3306 ev_at (w) = w->offset;
3307
3308 EV_FREQUENT_CHECK;
3309
3310 ++periodiccnt;
3311 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
3312 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
3313 ANHE_w (periodics [ev_active (w)]) = (WT)w;
3314 ANHE_at_cache (periodics [ev_active (w)]);
3315 upheap (periodics, ev_active (w));
3316
3317 EV_FREQUENT_CHECK;
3318
3319 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
3320}
3321
3322void noinline
3323ev_periodic_stop (EV_P_ ev_periodic *w)
3324{
3325 clear_pending (EV_A_ (W)w);
3326 if (expect_false (!ev_is_active (w)))
3327 return;
3328
3329 EV_FREQUENT_CHECK;
3330
3331 {
3332 int active = ev_active (w);
3333
3334 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3335
3336 --periodiccnt;
3337
3338 if (expect_true (active < periodiccnt + HEAP0))
3339 {
3340 periodics [active] = periodics [periodiccnt + HEAP0];
3341 adjustheap (periodics, periodiccnt, active);
3342 }
3343 }
3344
3345 ev_stop (EV_A_ (W)w);
3346
3347 EV_FREQUENT_CHECK;
3348}
3349
3350void noinline
3351ev_periodic_again (EV_P_ ev_periodic *w)
3352{
3353 /* TODO: use adjustheap and recalculation */
3354 ev_periodic_stop (EV_A_ w);
3355 ev_periodic_start (EV_A_ w);
3356}
3357#endif
3358
3359#ifndef SA_RESTART
3360# define SA_RESTART 0
3361#endif
3362
3363#if EV_SIGNAL_ENABLE
3364
3365void noinline
3366ev_signal_start (EV_P_ ev_signal *w)
3367{
3368 if (expect_false (ev_is_active (w)))
3369 return;
3370
3371 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3372
3373#if EV_MULTIPLICITY
3374 assert (("libev: a signal must not be attached to two different loops",
3375 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3376
3377 signals [w->signum - 1].loop = EV_A;
3378#endif
3379
3380 EV_FREQUENT_CHECK;
3381
3382#if EV_USE_SIGNALFD
3383 if (sigfd == -2)
3384 {
3385 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3386 if (sigfd < 0 && errno == EINVAL)
3387 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3388
3389 if (sigfd >= 0)
467 { 3390 {
468 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 3391 fd_intern (sigfd); /* doing it twice will not hurt */
469 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 3392
470 downheap ((WT *)periodics, periodiccnt, 0); 3393 sigemptyset (&sigfd_set);
3394
3395 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3396 ev_set_priority (&sigfd_w, EV_MAXPRI);
3397 ev_io_start (EV_A_ &sigfd_w);
3398 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3399 }
3400 }
3401
3402 if (sigfd >= 0)
3403 {
3404 /* TODO: check .head */
3405 sigaddset (&sigfd_set, w->signum);
3406 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3407
3408 signalfd (sigfd, &sigfd_set, 0);
3409 }
3410#endif
3411
3412 ev_start (EV_A_ (W)w, 1);
3413 wlist_add (&signals [w->signum - 1].head, (WL)w);
3414
3415 if (!((WL)w)->next)
3416# if EV_USE_SIGNALFD
3417 if (sigfd < 0) /*TODO*/
3418# endif
3419 {
3420# ifdef _WIN32
3421 evpipe_init (EV_A);
3422
3423 signal (w->signum, ev_sighandler);
3424# else
3425 struct sigaction sa;
3426
3427 evpipe_init (EV_A);
3428
3429 sa.sa_handler = ev_sighandler;
3430 sigfillset (&sa.sa_mask);
3431 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3432 sigaction (w->signum, &sa, 0);
3433
3434 if (origflags & EVFLAG_NOSIGMASK)
3435 {
3436 sigemptyset (&sa.sa_mask);
3437 sigaddset (&sa.sa_mask, w->signum);
3438 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3439 }
3440#endif
3441 }
3442
3443 EV_FREQUENT_CHECK;
3444}
3445
3446void noinline
3447ev_signal_stop (EV_P_ ev_signal *w)
3448{
3449 clear_pending (EV_A_ (W)w);
3450 if (expect_false (!ev_is_active (w)))
3451 return;
3452
3453 EV_FREQUENT_CHECK;
3454
3455 wlist_del (&signals [w->signum - 1].head, (WL)w);
3456 ev_stop (EV_A_ (W)w);
3457
3458 if (!signals [w->signum - 1].head)
3459 {
3460#if EV_MULTIPLICITY
3461 signals [w->signum - 1].loop = 0; /* unattach from signal */
3462#endif
3463#if EV_USE_SIGNALFD
3464 if (sigfd >= 0)
3465 {
3466 sigset_t ss;
3467
3468 sigemptyset (&ss);
3469 sigaddset (&ss, w->signum);
3470 sigdelset (&sigfd_set, w->signum);
3471
3472 signalfd (sigfd, &sigfd_set, 0);
3473 sigprocmask (SIG_UNBLOCK, &ss, 0);
471 } 3474 }
472 else 3475 else
473 evperiodic_stop (w); /* nonrepeating: stop timer */ 3476#endif
474 3477 signal (w->signum, SIG_DFL);
475 event ((W)w, EV_TIMEOUT);
476 }
477}
478
479static void
480periodics_reschedule (ev_tstamp diff)
481{
482 int i;
483
484 /* adjust periodics after time jump */
485 for (i = 0; i < periodiccnt; ++i)
486 { 3478 }
487 struct ev_periodic *w = periodics [i];
488 3479
489 if (w->interval) 3480 EV_FREQUENT_CHECK;
3481}
3482
3483#endif
3484
3485#if EV_CHILD_ENABLE
3486
3487void
3488ev_child_start (EV_P_ ev_child *w)
3489{
3490#if EV_MULTIPLICITY
3491 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3492#endif
3493 if (expect_false (ev_is_active (w)))
3494 return;
3495
3496 EV_FREQUENT_CHECK;
3497
3498 ev_start (EV_A_ (W)w, 1);
3499 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3500
3501 EV_FREQUENT_CHECK;
3502}
3503
3504void
3505ev_child_stop (EV_P_ ev_child *w)
3506{
3507 clear_pending (EV_A_ (W)w);
3508 if (expect_false (!ev_is_active (w)))
3509 return;
3510
3511 EV_FREQUENT_CHECK;
3512
3513 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3514 ev_stop (EV_A_ (W)w);
3515
3516 EV_FREQUENT_CHECK;
3517}
3518
3519#endif
3520
3521#if EV_STAT_ENABLE
3522
3523# ifdef _WIN32
3524# undef lstat
3525# define lstat(a,b) _stati64 (a,b)
3526# endif
3527
3528#define DEF_STAT_INTERVAL 5.0074891
3529#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3530#define MIN_STAT_INTERVAL 0.1074891
3531
3532static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3533
3534#if EV_USE_INOTIFY
3535
3536/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3537# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3538
3539static void noinline
3540infy_add (EV_P_ ev_stat *w)
3541{
3542 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);
3543
3544 if (w->wd >= 0)
3545 {
3546 struct statfs sfs;
3547
3548 /* now local changes will be tracked by inotify, but remote changes won't */
3549 /* unless the filesystem is known to be local, we therefore still poll */
3550 /* also do poll on <2.6.25, but with normal frequency */
3551
3552 if (!fs_2625)
3553 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3554 else if (!statfs (w->path, &sfs)
3555 && (sfs.f_type == 0x1373 /* devfs */
3556 || sfs.f_type == 0xEF53 /* ext2/3 */
3557 || sfs.f_type == 0x3153464a /* jfs */
3558 || sfs.f_type == 0x52654973 /* reiser3 */
3559 || sfs.f_type == 0x01021994 /* tempfs */
3560 || sfs.f_type == 0x58465342 /* xfs */))
3561 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3562 else
3563 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3564 }
3565 else
3566 {
3567 /* can't use inotify, continue to stat */
3568 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3569
3570 /* if path is not there, monitor some parent directory for speedup hints */
3571 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3572 /* but an efficiency issue only */
3573 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
490 { 3574 {
491 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 3575 char path [4096];
3576 strcpy (path, w->path);
492 3577
493 if (fabs (diff) >= 1e-4) 3578 do
494 { 3579 {
495 evperiodic_stop (w); 3580 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
496 evperiodic_start (w); 3581 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
497 3582
498 i = 0; /* restart loop, inefficient, but time jumps should be rare */ 3583 char *pend = strrchr (path, '/');
3584
3585 if (!pend || pend == path)
3586 break;
3587
3588 *pend = 0;
3589 w->wd = inotify_add_watch (fs_fd, path, mask);
3590 }
3591 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3592 }
3593 }
3594
3595 if (w->wd >= 0)
3596 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3597
3598 /* now re-arm timer, if required */
3599 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3600 ev_timer_again (EV_A_ &w->timer);
3601 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3602}
3603
3604static void noinline
3605infy_del (EV_P_ ev_stat *w)
3606{
3607 int slot;
3608 int wd = w->wd;
3609
3610 if (wd < 0)
3611 return;
3612
3613 w->wd = -2;
3614 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3615 wlist_del (&fs_hash [slot].head, (WL)w);
3616
3617 /* remove this watcher, if others are watching it, they will rearm */
3618 inotify_rm_watch (fs_fd, wd);
3619}
3620
3621static void noinline
3622infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3623{
3624 if (slot < 0)
3625 /* overflow, need to check for all hash slots */
3626 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3627 infy_wd (EV_A_ slot, wd, ev);
3628 else
3629 {
3630 WL w_;
3631
3632 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3633 {
3634 ev_stat *w = (ev_stat *)w_;
3635 w_ = w_->next; /* lets us remove this watcher and all before it */
3636
3637 if (w->wd == wd || wd == -1)
3638 {
3639 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3640 {
3641 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3642 w->wd = -1;
3643 infy_add (EV_A_ w); /* re-add, no matter what */
3644 }
3645
3646 stat_timer_cb (EV_A_ &w->timer, 0);
499 } 3647 }
500 } 3648 }
501 } 3649 }
502} 3650}
503 3651
504static void 3652static void
505time_update () 3653infy_cb (EV_P_ ev_io *w, int revents)
506{ 3654{
3655 char buf [EV_INOTIFY_BUFSIZE];
507 int i; 3656 int ofs;
3657 int len = read (fs_fd, buf, sizeof (buf));
508 3658
509 ev_now = ev_time (); 3659 for (ofs = 0; ofs < len; )
510 3660 {
511 if (have_monotonic) 3661 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3662 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3663 ofs += sizeof (struct inotify_event) + ev->len;
512 { 3664 }
513 ev_tstamp odiff = diff; 3665}
514 3666
515 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 3667inline_size void ecb_cold
3668ev_check_2625 (EV_P)
3669{
3670 /* kernels < 2.6.25 are borked
3671 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3672 */
3673 if (ev_linux_version () < 0x020619)
3674 return;
3675
3676 fs_2625 = 1;
3677}
3678
3679inline_size int
3680infy_newfd (void)
3681{
3682#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3683 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3684 if (fd >= 0)
3685 return fd;
3686#endif
3687 return inotify_init ();
3688}
3689
3690inline_size void
3691infy_init (EV_P)
3692{
3693 if (fs_fd != -2)
3694 return;
3695
3696 fs_fd = -1;
3697
3698 ev_check_2625 (EV_A);
3699
3700 fs_fd = infy_newfd ();
3701
3702 if (fs_fd >= 0)
3703 {
3704 fd_intern (fs_fd);
3705 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3706 ev_set_priority (&fs_w, EV_MAXPRI);
3707 ev_io_start (EV_A_ &fs_w);
3708 ev_unref (EV_A);
3709 }
3710}
3711
3712inline_size void
3713infy_fork (EV_P)
3714{
3715 int slot;
3716
3717 if (fs_fd < 0)
3718 return;
3719
3720 ev_ref (EV_A);
3721 ev_io_stop (EV_A_ &fs_w);
3722 close (fs_fd);
3723 fs_fd = infy_newfd ();
3724
3725 if (fs_fd >= 0)
3726 {
3727 fd_intern (fs_fd);
3728 ev_io_set (&fs_w, fs_fd, EV_READ);
3729 ev_io_start (EV_A_ &fs_w);
3730 ev_unref (EV_A);
3731 }
3732
3733 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3734 {
3735 WL w_ = fs_hash [slot].head;
3736 fs_hash [slot].head = 0;
3737
3738 while (w_)
516 { 3739 {
517 now = get_clock (); 3740 ev_stat *w = (ev_stat *)w_;
518 diff = ev_now - now; 3741 w_ = w_->next; /* lets us add this watcher */
519 3742
520 if (fabs (odiff - diff) < MIN_TIMEJUMP) 3743 w->wd = -1;
521 return; /* all is well */
522 3744
523 ev_now = ev_time (); 3745 if (fs_fd >= 0)
3746 infy_add (EV_A_ w); /* re-add, no matter what */
3747 else
3748 {
3749 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3750 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3751 ev_timer_again (EV_A_ &w->timer);
3752 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3753 }
524 } 3754 }
525
526 periodics_reschedule (diff - odiff);
527 /* no timer adjustment, as the monotonic clock doesn't jump */
528 } 3755 }
3756}
3757
3758#endif
3759
3760#ifdef _WIN32
3761# define EV_LSTAT(p,b) _stati64 (p, b)
3762#else
3763# define EV_LSTAT(p,b) lstat (p, b)
3764#endif
3765
3766void
3767ev_stat_stat (EV_P_ ev_stat *w)
3768{
3769 if (lstat (w->path, &w->attr) < 0)
3770 w->attr.st_nlink = 0;
3771 else if (!w->attr.st_nlink)
3772 w->attr.st_nlink = 1;
3773}
3774
3775static void noinline
3776stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3777{
3778 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3779
3780 ev_statdata prev = w->attr;
3781 ev_stat_stat (EV_A_ w);
3782
3783 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3784 if (
3785 prev.st_dev != w->attr.st_dev
3786 || prev.st_ino != w->attr.st_ino
3787 || prev.st_mode != w->attr.st_mode
3788 || prev.st_nlink != w->attr.st_nlink
3789 || prev.st_uid != w->attr.st_uid
3790 || prev.st_gid != w->attr.st_gid
3791 || prev.st_rdev != w->attr.st_rdev
3792 || prev.st_size != w->attr.st_size
3793 || prev.st_atime != w->attr.st_atime
3794 || prev.st_mtime != w->attr.st_mtime
3795 || prev.st_ctime != w->attr.st_ctime
3796 ) {
3797 /* we only update w->prev on actual differences */
3798 /* in case we test more often than invoke the callback, */
3799 /* to ensure that prev is always different to attr */
3800 w->prev = prev;
3801
3802 #if EV_USE_INOTIFY
3803 if (fs_fd >= 0)
3804 {
3805 infy_del (EV_A_ w);
3806 infy_add (EV_A_ w);
3807 ev_stat_stat (EV_A_ w); /* avoid race... */
3808 }
3809 #endif
3810
3811 ev_feed_event (EV_A_ w, EV_STAT);
3812 }
3813}
3814
3815void
3816ev_stat_start (EV_P_ ev_stat *w)
3817{
3818 if (expect_false (ev_is_active (w)))
3819 return;
3820
3821 ev_stat_stat (EV_A_ w);
3822
3823 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3824 w->interval = MIN_STAT_INTERVAL;
3825
3826 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3827 ev_set_priority (&w->timer, ev_priority (w));
3828
3829#if EV_USE_INOTIFY
3830 infy_init (EV_A);
3831
3832 if (fs_fd >= 0)
3833 infy_add (EV_A_ w);
529 else 3834 else
3835#endif
3836 {
3837 ev_timer_again (EV_A_ &w->timer);
3838 ev_unref (EV_A);
530 { 3839 }
531 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 3840
3841 ev_start (EV_A_ (W)w, 1);
3842
3843 EV_FREQUENT_CHECK;
3844}
3845
3846void
3847ev_stat_stop (EV_P_ ev_stat *w)
3848{
3849 clear_pending (EV_A_ (W)w);
3850 if (expect_false (!ev_is_active (w)))
3851 return;
3852
3853 EV_FREQUENT_CHECK;
3854
3855#if EV_USE_INOTIFY
3856 infy_del (EV_A_ w);
3857#endif
3858
3859 if (ev_is_active (&w->timer))
3860 {
3861 ev_ref (EV_A);
3862 ev_timer_stop (EV_A_ &w->timer);
3863 }
3864
3865 ev_stop (EV_A_ (W)w);
3866
3867 EV_FREQUENT_CHECK;
3868}
3869#endif
3870
3871#if EV_IDLE_ENABLE
3872void
3873ev_idle_start (EV_P_ ev_idle *w)
3874{
3875 if (expect_false (ev_is_active (w)))
3876 return;
3877
3878 pri_adjust (EV_A_ (W)w);
3879
3880 EV_FREQUENT_CHECK;
3881
3882 {
3883 int active = ++idlecnt [ABSPRI (w)];
3884
3885 ++idleall;
3886 ev_start (EV_A_ (W)w, active);
3887
3888 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3889 idles [ABSPRI (w)][active - 1] = w;
3890 }
3891
3892 EV_FREQUENT_CHECK;
3893}
3894
3895void
3896ev_idle_stop (EV_P_ ev_idle *w)
3897{
3898 clear_pending (EV_A_ (W)w);
3899 if (expect_false (!ev_is_active (w)))
3900 return;
3901
3902 EV_FREQUENT_CHECK;
3903
3904 {
3905 int active = ev_active (w);
3906
3907 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3908 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3909
3910 ev_stop (EV_A_ (W)w);
3911 --idleall;
3912 }
3913
3914 EV_FREQUENT_CHECK;
3915}
3916#endif
3917
3918#if EV_PREPARE_ENABLE
3919void
3920ev_prepare_start (EV_P_ ev_prepare *w)
3921{
3922 if (expect_false (ev_is_active (w)))
3923 return;
3924
3925 EV_FREQUENT_CHECK;
3926
3927 ev_start (EV_A_ (W)w, ++preparecnt);
3928 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3929 prepares [preparecnt - 1] = w;
3930
3931 EV_FREQUENT_CHECK;
3932}
3933
3934void
3935ev_prepare_stop (EV_P_ ev_prepare *w)
3936{
3937 clear_pending (EV_A_ (W)w);
3938 if (expect_false (!ev_is_active (w)))
3939 return;
3940
3941 EV_FREQUENT_CHECK;
3942
3943 {
3944 int active = ev_active (w);
3945
3946 prepares [active - 1] = prepares [--preparecnt];
3947 ev_active (prepares [active - 1]) = active;
3948 }
3949
3950 ev_stop (EV_A_ (W)w);
3951
3952 EV_FREQUENT_CHECK;
3953}
3954#endif
3955
3956#if EV_CHECK_ENABLE
3957void
3958ev_check_start (EV_P_ ev_check *w)
3959{
3960 if (expect_false (ev_is_active (w)))
3961 return;
3962
3963 EV_FREQUENT_CHECK;
3964
3965 ev_start (EV_A_ (W)w, ++checkcnt);
3966 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3967 checks [checkcnt - 1] = w;
3968
3969 EV_FREQUENT_CHECK;
3970}
3971
3972void
3973ev_check_stop (EV_P_ ev_check *w)
3974{
3975 clear_pending (EV_A_ (W)w);
3976 if (expect_false (!ev_is_active (w)))
3977 return;
3978
3979 EV_FREQUENT_CHECK;
3980
3981 {
3982 int active = ev_active (w);
3983
3984 checks [active - 1] = checks [--checkcnt];
3985 ev_active (checks [active - 1]) = active;
3986 }
3987
3988 ev_stop (EV_A_ (W)w);
3989
3990 EV_FREQUENT_CHECK;
3991}
3992#endif
3993
3994#if EV_EMBED_ENABLE
3995void noinline
3996ev_embed_sweep (EV_P_ ev_embed *w)
3997{
3998 ev_run (w->other, EVRUN_NOWAIT);
3999}
4000
4001static void
4002embed_io_cb (EV_P_ ev_io *io, int revents)
4003{
4004 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
4005
4006 if (ev_cb (w))
4007 ev_feed_event (EV_A_ (W)w, EV_EMBED);
4008 else
4009 ev_run (w->other, EVRUN_NOWAIT);
4010}
4011
4012static void
4013embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4014{
4015 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4016
4017 {
4018 EV_P = w->other;
4019
4020 while (fdchangecnt)
532 { 4021 {
533 periodics_reschedule (ev_now - now); 4022 fd_reify (EV_A);
534 4023 ev_run (EV_A_ EVRUN_NOWAIT);
535 /* adjust timers. this is easy, as the offset is the same for all */
536 for (i = 0; i < timercnt; ++i)
537 timers [i]->at += diff;
538 } 4024 }
539
540 now = ev_now;
541 } 4025 }
542} 4026}
543 4027
544int ev_loop_done; 4028static void
545 4029embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
546void ev_loop (int flags)
547{ 4030{
548 double block; 4031 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
549 ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
550 4032
551 if (checkcnt) 4033 ev_embed_stop (EV_A_ w);
4034
552 { 4035 {
553 queue_events ((W *)checks, checkcnt, EV_CHECK); 4036 EV_P = w->other;
554 call_pending (); 4037
4038 ev_loop_fork (EV_A);
4039 ev_run (EV_A_ EVRUN_NOWAIT);
555 } 4040 }
556 4041
557 do 4042 ev_embed_start (EV_A_ w);
4043}
4044
4045#if 0
4046static void
4047embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4048{
4049 ev_idle_stop (EV_A_ idle);
4050}
4051#endif
4052
4053void
4054ev_embed_start (EV_P_ ev_embed *w)
4055{
4056 if (expect_false (ev_is_active (w)))
4057 return;
4058
558 { 4059 {
559 /* update fd-related kernel structures */ 4060 EV_P = w->other;
560 fd_reify (); 4061 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
561 4062 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
562 /* calculate blocking time */
563
564 /* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */
565 ev_now = ev_time ();
566
567 if (flags & EVLOOP_NONBLOCK || idlecnt)
568 block = 0.;
569 else
570 {
571 block = MAX_BLOCKTIME;
572
573 if (timercnt)
574 {
575 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
576 if (block > to) block = to;
577 }
578
579 if (periodiccnt)
580 {
581 ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
582 if (block > to) block = to;
583 }
584
585 if (block < 0.) block = 0.;
586 }
587
588 method_poll (block);
589
590 /* update ev_now, do magic */
591 time_update ();
592
593 /* queue pending timers and reschedule them */
594 periodics_reify (); /* absolute timers first */
595 timers_reify (); /* relative timers second */
596
597 /* queue idle watchers unless io or timers are pending */
598 if (!pendingcnt)
599 queue_events ((W *)idles, idlecnt, EV_IDLE);
600
601 /* queue check and possibly idle watchers */
602 queue_events ((W *)checks, checkcnt, EV_CHECK);
603
604 call_pending ();
605 } 4063 }
606 while (!ev_loop_done);
607 4064
608 if (ev_loop_done != 2) 4065 EV_FREQUENT_CHECK;
609 ev_loop_done = 0; 4066
4067 ev_set_priority (&w->io, ev_priority (w));
4068 ev_io_start (EV_A_ &w->io);
4069
4070 ev_prepare_init (&w->prepare, embed_prepare_cb);
4071 ev_set_priority (&w->prepare, EV_MINPRI);
4072 ev_prepare_start (EV_A_ &w->prepare);
4073
4074 ev_fork_init (&w->fork, embed_fork_cb);
4075 ev_fork_start (EV_A_ &w->fork);
4076
4077 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4078
4079 ev_start (EV_A_ (W)w, 1);
4080
4081 EV_FREQUENT_CHECK;
610} 4082}
4083
4084void
4085ev_embed_stop (EV_P_ ev_embed *w)
4086{
4087 clear_pending (EV_A_ (W)w);
4088 if (expect_false (!ev_is_active (w)))
4089 return;
4090
4091 EV_FREQUENT_CHECK;
4092
4093 ev_io_stop (EV_A_ &w->io);
4094 ev_prepare_stop (EV_A_ &w->prepare);
4095 ev_fork_stop (EV_A_ &w->fork);
4096
4097 ev_stop (EV_A_ (W)w);
4098
4099 EV_FREQUENT_CHECK;
4100}
4101#endif
4102
4103#if EV_FORK_ENABLE
4104void
4105ev_fork_start (EV_P_ ev_fork *w)
4106{
4107 if (expect_false (ev_is_active (w)))
4108 return;
4109
4110 EV_FREQUENT_CHECK;
4111
4112 ev_start (EV_A_ (W)w, ++forkcnt);
4113 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4114 forks [forkcnt - 1] = w;
4115
4116 EV_FREQUENT_CHECK;
4117}
4118
4119void
4120ev_fork_stop (EV_P_ ev_fork *w)
4121{
4122 clear_pending (EV_A_ (W)w);
4123 if (expect_false (!ev_is_active (w)))
4124 return;
4125
4126 EV_FREQUENT_CHECK;
4127
4128 {
4129 int active = ev_active (w);
4130
4131 forks [active - 1] = forks [--forkcnt];
4132 ev_active (forks [active - 1]) = active;
4133 }
4134
4135 ev_stop (EV_A_ (W)w);
4136
4137 EV_FREQUENT_CHECK;
4138}
4139#endif
4140
4141#if EV_CLEANUP_ENABLE
4142void
4143ev_cleanup_start (EV_P_ ev_cleanup *w)
4144{
4145 if (expect_false (ev_is_active (w)))
4146 return;
4147
4148 EV_FREQUENT_CHECK;
4149
4150 ev_start (EV_A_ (W)w, ++cleanupcnt);
4151 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4152 cleanups [cleanupcnt - 1] = w;
4153
4154 /* cleanup watchers should never keep a refcount on the loop */
4155 ev_unref (EV_A);
4156 EV_FREQUENT_CHECK;
4157}
4158
4159void
4160ev_cleanup_stop (EV_P_ ev_cleanup *w)
4161{
4162 clear_pending (EV_A_ (W)w);
4163 if (expect_false (!ev_is_active (w)))
4164 return;
4165
4166 EV_FREQUENT_CHECK;
4167 ev_ref (EV_A);
4168
4169 {
4170 int active = ev_active (w);
4171
4172 cleanups [active - 1] = cleanups [--cleanupcnt];
4173 ev_active (cleanups [active - 1]) = active;
4174 }
4175
4176 ev_stop (EV_A_ (W)w);
4177
4178 EV_FREQUENT_CHECK;
4179}
4180#endif
4181
4182#if EV_ASYNC_ENABLE
4183void
4184ev_async_start (EV_P_ ev_async *w)
4185{
4186 if (expect_false (ev_is_active (w)))
4187 return;
4188
4189 w->sent = 0;
4190
4191 evpipe_init (EV_A);
4192
4193 EV_FREQUENT_CHECK;
4194
4195 ev_start (EV_A_ (W)w, ++asynccnt);
4196 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4197 asyncs [asynccnt - 1] = w;
4198
4199 EV_FREQUENT_CHECK;
4200}
4201
4202void
4203ev_async_stop (EV_P_ ev_async *w)
4204{
4205 clear_pending (EV_A_ (W)w);
4206 if (expect_false (!ev_is_active (w)))
4207 return;
4208
4209 EV_FREQUENT_CHECK;
4210
4211 {
4212 int active = ev_active (w);
4213
4214 asyncs [active - 1] = asyncs [--asynccnt];
4215 ev_active (asyncs [active - 1]) = active;
4216 }
4217
4218 ev_stop (EV_A_ (W)w);
4219
4220 EV_FREQUENT_CHECK;
4221}
4222
4223void
4224ev_async_send (EV_P_ ev_async *w)
4225{
4226 w->sent = 1;
4227 evpipe_write (EV_A_ &async_pending);
4228}
4229#endif
611 4230
612/*****************************************************************************/ 4231/*****************************************************************************/
613 4232
614static void
615wlist_add (WL *head, WL elem)
616{
617 elem->next = *head;
618 *head = elem;
619}
620
621static void
622wlist_del (WL *head, WL elem)
623{
624 while (*head)
625 {
626 if (*head == elem)
627 {
628 *head = elem->next;
629 return;
630 }
631
632 head = &(*head)->next;
633 }
634}
635
636static void
637ev_clear (W w)
638{
639 if (w->pending)
640 {
641 pendings [w->pending - 1].w = 0;
642 w->pending = 0;
643 }
644}
645
646static void
647ev_start (W w, int active)
648{
649 w->active = active;
650}
651
652static void
653ev_stop (W w)
654{
655 w->active = 0;
656}
657
658/*****************************************************************************/
659
660void
661evio_start (struct ev_io *w)
662{
663 if (ev_is_active (w))
664 return;
665
666 int fd = w->fd;
667
668 ev_start ((W)w, 1);
669 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
670 wlist_add ((WL *)&anfds[fd].head, (WL)w);
671
672 ++fdchangecnt;
673 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
674 fdchanges [fdchangecnt - 1] = fd;
675}
676
677void
678evio_stop (struct ev_io *w)
679{
680 ev_clear ((W)w);
681 if (!ev_is_active (w))
682 return;
683
684 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
685 ev_stop ((W)w);
686
687 ++fdchangecnt;
688 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
689 fdchanges [fdchangecnt - 1] = w->fd;
690}
691
692void
693evtimer_start (struct ev_timer *w)
694{
695 if (ev_is_active (w))
696 return;
697
698 w->at += now;
699
700 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));
701
702 ev_start ((W)w, ++timercnt);
703 array_needsize (timers, timermax, timercnt, );
704 timers [timercnt - 1] = w;
705 upheap ((WT *)timers, timercnt - 1);
706}
707
708void
709evtimer_stop (struct ev_timer *w)
710{
711 ev_clear ((W)w);
712 if (!ev_is_active (w))
713 return;
714
715 if (w->active < timercnt--)
716 {
717 timers [w->active - 1] = timers [timercnt];
718 downheap ((WT *)timers, timercnt, w->active - 1);
719 }
720
721 w->at = w->repeat;
722
723 ev_stop ((W)w);
724}
725
726void
727evtimer_again (struct ev_timer *w)
728{
729 if (ev_is_active (w))
730 {
731 if (w->repeat)
732 {
733 w->at = now + w->repeat;
734 downheap ((WT *)timers, timercnt, w->active - 1);
735 }
736 else
737 evtimer_stop (w);
738 }
739 else if (w->repeat)
740 evtimer_start (w);
741}
742
743void
744evperiodic_start (struct ev_periodic *w)
745{
746 if (ev_is_active (w))
747 return;
748
749 assert (("periodic interval value less than zero not allowed", w->interval >= 0.));
750
751 /* this formula differs from the one in periodic_reify because we do not always round up */
752 if (w->interval)
753 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
754
755 ev_start ((W)w, ++periodiccnt);
756 array_needsize (periodics, periodicmax, periodiccnt, );
757 periodics [periodiccnt - 1] = w;
758 upheap ((WT *)periodics, periodiccnt - 1);
759}
760
761void
762evperiodic_stop (struct ev_periodic *w)
763{
764 ev_clear ((W)w);
765 if (!ev_is_active (w))
766 return;
767
768 if (w->active < periodiccnt--)
769 {
770 periodics [w->active - 1] = periodics [periodiccnt];
771 downheap ((WT *)periodics, periodiccnt, w->active - 1);
772 }
773
774 ev_stop ((W)w);
775}
776
777void
778evsignal_start (struct ev_signal *w)
779{
780 if (ev_is_active (w))
781 return;
782
783 ev_start ((W)w, 1);
784 array_needsize (signals, signalmax, w->signum, signals_init);
785 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
786
787 if (!w->next)
788 {
789 struct sigaction sa;
790 sa.sa_handler = sighandler;
791 sigfillset (&sa.sa_mask);
792 sa.sa_flags = 0;
793 sigaction (w->signum, &sa, 0);
794 }
795}
796
797void
798evsignal_stop (struct ev_signal *w)
799{
800 ev_clear ((W)w);
801 if (!ev_is_active (w))
802 return;
803
804 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
805 ev_stop ((W)w);
806
807 if (!signals [w->signum - 1].head)
808 signal (w->signum, SIG_DFL);
809}
810
811void evidle_start (struct ev_idle *w)
812{
813 if (ev_is_active (w))
814 return;
815
816 ev_start ((W)w, ++idlecnt);
817 array_needsize (idles, idlemax, idlecnt, );
818 idles [idlecnt - 1] = w;
819}
820
821void evidle_stop (struct ev_idle *w)
822{
823 ev_clear ((W)w);
824 if (ev_is_active (w))
825 return;
826
827 idles [w->active - 1] = idles [--idlecnt];
828 ev_stop ((W)w);
829}
830
831void evcheck_start (struct ev_check *w)
832{
833 if (ev_is_active (w))
834 return;
835
836 ev_start ((W)w, ++checkcnt);
837 array_needsize (checks, checkmax, checkcnt, );
838 checks [checkcnt - 1] = w;
839}
840
841void evcheck_stop (struct ev_check *w)
842{
843 ev_clear ((W)w);
844 if (ev_is_active (w))
845 return;
846
847 checks [w->active - 1] = checks [--checkcnt];
848 ev_stop ((W)w);
849}
850
851/*****************************************************************************/
852
853struct ev_once 4233struct ev_once
854{ 4234{
855 struct ev_io io; 4235 ev_io io;
856 struct ev_timer to; 4236 ev_timer to;
857 void (*cb)(int revents, void *arg); 4237 void (*cb)(int revents, void *arg);
858 void *arg; 4238 void *arg;
859}; 4239};
860 4240
861static void 4241static void
862once_cb (struct ev_once *once, int revents) 4242once_cb (EV_P_ struct ev_once *once, int revents)
863{ 4243{
864 void (*cb)(int revents, void *arg) = once->cb; 4244 void (*cb)(int revents, void *arg) = once->cb;
865 void *arg = once->arg; 4245 void *arg = once->arg;
866 4246
867 evio_stop (&once->io); 4247 ev_io_stop (EV_A_ &once->io);
868 evtimer_stop (&once->to); 4248 ev_timer_stop (EV_A_ &once->to);
869 free (once); 4249 ev_free (once);
870 4250
871 cb (revents, arg); 4251 cb (revents, arg);
872} 4252}
873 4253
874static void 4254static void
875once_cb_io (struct ev_io *w, int revents) 4255once_cb_io (EV_P_ ev_io *w, int revents)
876{ 4256{
877 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4257 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4258
4259 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
878} 4260}
879 4261
880static void 4262static void
881once_cb_to (struct ev_timer *w, int revents) 4263once_cb_to (EV_P_ ev_timer *w, int revents)
882{ 4264{
883 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4265 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4266
4267 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
884} 4268}
885 4269
886void 4270void
887ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4271ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
888{ 4272{
889 struct ev_once *once = malloc (sizeof (struct ev_once)); 4273 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
890 4274
891 if (!once) 4275 if (expect_false (!once))
892 cb (EV_ERROR, arg); 4276 {
893 else 4277 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
4278 return;
894 { 4279 }
4280
895 once->cb = cb; 4281 once->cb = cb;
896 once->arg = arg; 4282 once->arg = arg;
897 4283
898 evw_init (&once->io, once_cb_io); 4284 ev_init (&once->io, once_cb_io);
899
900 if (fd >= 0) 4285 if (fd >= 0)
4286 {
4287 ev_io_set (&once->io, fd, events);
4288 ev_io_start (EV_A_ &once->io);
4289 }
4290
4291 ev_init (&once->to, once_cb_to);
4292 if (timeout >= 0.)
4293 {
4294 ev_timer_set (&once->to, timeout, 0.);
4295 ev_timer_start (EV_A_ &once->to);
4296 }
4297}
4298
4299/*****************************************************************************/
4300
4301#if EV_WALK_ENABLE
4302void ecb_cold
4303ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
4304{
4305 int i, j;
4306 ev_watcher_list *wl, *wn;
4307
4308 if (types & (EV_IO | EV_EMBED))
4309 for (i = 0; i < anfdmax; ++i)
4310 for (wl = anfds [i].head; wl; )
901 { 4311 {
902 evio_set (&once->io, fd, events); 4312 wn = wl->next;
903 evio_start (&once->io); 4313
4314#if EV_EMBED_ENABLE
4315 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4316 {
4317 if (types & EV_EMBED)
4318 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4319 }
4320 else
4321#endif
4322#if EV_USE_INOTIFY
4323 if (ev_cb ((ev_io *)wl) == infy_cb)
4324 ;
4325 else
4326#endif
4327 if ((ev_io *)wl != &pipe_w)
4328 if (types & EV_IO)
4329 cb (EV_A_ EV_IO, wl);
4330
4331 wl = wn;
904 } 4332 }
905 4333
906 evw_init (&once->to, once_cb_to); 4334 if (types & (EV_TIMER | EV_STAT))
907 4335 for (i = timercnt + HEAP0; i-- > HEAP0; )
908 if (timeout >= 0.) 4336#if EV_STAT_ENABLE
4337 /*TODO: timer is not always active*/
4338 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
909 { 4339 {
910 evtimer_set (&once->to, timeout, 0.); 4340 if (types & EV_STAT)
911 evtimer_start (&once->to); 4341 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
912 } 4342 }
913 } 4343 else
914} 4344#endif
4345 if (types & EV_TIMER)
4346 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
915 4347
916/*****************************************************************************/ 4348#if EV_PERIODIC_ENABLE
4349 if (types & EV_PERIODIC)
4350 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4351 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4352#endif
917 4353
918#if 0 4354#if EV_IDLE_ENABLE
4355 if (types & EV_IDLE)
4356 for (j = NUMPRI; j--; )
4357 for (i = idlecnt [j]; i--; )
4358 cb (EV_A_ EV_IDLE, idles [j][i]);
4359#endif
919 4360
920struct ev_io wio; 4361#if EV_FORK_ENABLE
4362 if (types & EV_FORK)
4363 for (i = forkcnt; i--; )
4364 if (ev_cb (forks [i]) != embed_fork_cb)
4365 cb (EV_A_ EV_FORK, forks [i]);
4366#endif
921 4367
922static void 4368#if EV_ASYNC_ENABLE
923sin_cb (struct ev_io *w, int revents) 4369 if (types & EV_ASYNC)
924{ 4370 for (i = asynccnt; i--; )
925 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 4371 cb (EV_A_ EV_ASYNC, asyncs [i]);
926} 4372#endif
927 4373
928static void 4374#if EV_PREPARE_ENABLE
929ocb (struct ev_timer *w, int revents) 4375 if (types & EV_PREPARE)
930{ 4376 for (i = preparecnt; i--; )
931 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 4377# if EV_EMBED_ENABLE
932 evtimer_stop (w); 4378 if (ev_cb (prepares [i]) != embed_prepare_cb)
933 evtimer_start (w);
934}
935
936static void
937scb (struct ev_signal *w, int revents)
938{
939 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
940 evio_stop (&wio);
941 evio_start (&wio);
942}
943
944static void
945gcb (struct ev_signal *w, int revents)
946{
947 fprintf (stderr, "generic %x\n", revents);
948
949}
950
951int main (void)
952{
953 ev_init (0);
954
955 evio_init (&wio, sin_cb, 0, EV_READ);
956 evio_start (&wio);
957
958 struct ev_timer t[10000];
959
960#if 0
961 int i;
962 for (i = 0; i < 10000; ++i)
963 {
964 struct ev_timer *w = t + i;
965 evw_init (w, ocb, i);
966 evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
967 evtimer_start (w);
968 if (drand48 () < 0.5)
969 evtimer_stop (w);
970 }
971#endif 4379# endif
972 4380 cb (EV_A_ EV_PREPARE, prepares [i]);
973 struct ev_timer t1;
974 evtimer_init (&t1, ocb, 5, 10);
975 evtimer_start (&t1);
976
977 struct ev_signal sig;
978 evsignal_init (&sig, scb, SIGQUIT);
979 evsignal_start (&sig);
980
981 struct ev_check cw;
982 evcheck_init (&cw, gcb);
983 evcheck_start (&cw);
984
985 struct ev_idle iw;
986 evidle_init (&iw, gcb);
987 evidle_start (&iw);
988
989 ev_loop (0);
990
991 return 0;
992}
993
994#endif 4381#endif
995 4382
4383#if EV_CHECK_ENABLE
4384 if (types & EV_CHECK)
4385 for (i = checkcnt; i--; )
4386 cb (EV_A_ EV_CHECK, checks [i]);
4387#endif
996 4388
4389#if EV_SIGNAL_ENABLE
4390 if (types & EV_SIGNAL)
4391 for (i = 0; i < EV_NSIG - 1; ++i)
4392 for (wl = signals [i].head; wl; )
4393 {
4394 wn = wl->next;
4395 cb (EV_A_ EV_SIGNAL, wl);
4396 wl = wn;
4397 }
4398#endif
997 4399
4400#if EV_CHILD_ENABLE
4401 if (types & EV_CHILD)
4402 for (i = (EV_PID_HASHSIZE); i--; )
4403 for (wl = childs [i]; wl; )
4404 {
4405 wn = wl->next;
4406 cb (EV_A_ EV_CHILD, wl);
4407 wl = wn;
4408 }
4409#endif
4410/* EV_STAT 0x00001000 /* stat data changed */
4411/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4412}
4413#endif
998 4414
4415#if EV_MULTIPLICITY
4416 #include "ev_wrap.h"
4417#endif
4418

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