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Comparing libev/ev.c (file contents):
Revision 1.7 by root, Wed Oct 31 00:24:16 2007 UTC vs.
Revision 1.440 by root, Tue May 29 21:37:14 2012 UTC

1#include <math.h> 1/*
2 * libev event processing core, watcher management
3 *
4 * Copyright (c) 2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26 * OF THE POSSIBILITY OF SUCH DAMAGE.
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.
38 */
39
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
2#include <stdlib.h> 167#include <stdlib.h>
3#include <unistd.h> 168#include <string.h>
4#include <fcntl.h> 169#include <fcntl.h>
5#include <signal.h> 170#include <stddef.h>
6 171
7#include <stdio.h> 172#include <stdio.h>
8 173
9#include <assert.h> 174#include <assert.h>
10#include <errno.h> 175#include <errno.h>
11#include <sys/time.h> 176#include <sys/types.h>
12#include <time.h> 177#include <time.h>
178#include <limits.h>
13 179
180#include <signal.h>
181
182#ifdef EV_H
183# include EV_H
184#else
185# include "ev.h"
186#endif
187
188#if EV_NO_THREADS
189# undef EV_NO_SMP
190# define EV_NO_SMP 1
191# undef ECB_NO_THREADS
192# define ECB_NO_THREADS 1
193#endif
194#if EV_NO_SMP
195# undef EV_NO_SMP
196# define ECB_NO_SMP 1
197#endif
198
199#ifndef _WIN32
200# include <sys/time.h>
201# include <sys/wait.h>
202# include <unistd.h>
203#else
204# include <io.h>
205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
207# include <windows.h>
208# ifndef EV_SELECT_IS_WINSOCKET
209# define EV_SELECT_IS_WINSOCKET 1
210# endif
211# undef EV_AVOID_STDIO
212#endif
213
214/* OS X, in its infinite idiocy, actually HARDCODES
215 * a limit of 1024 into their select. Where people have brains,
216 * OS X engineers apparently have a vacuum. Or maybe they were
217 * ordered to have a vacuum, or they do anything for money.
218 * This might help. Or not.
219 */
220#define _DARWIN_UNLIMITED_SELECT 1
221
222/* this block tries to deduce configuration from header-defined symbols and defaults */
223
224/* try to deduce the maximum number of signals on this platform */
225#if defined EV_NSIG
226/* use what's provided */
227#elif defined NSIG
228# define EV_NSIG (NSIG)
229#elif defined _NSIG
230# define EV_NSIG (_NSIG)
231#elif defined SIGMAX
232# define EV_NSIG (SIGMAX+1)
233#elif defined SIG_MAX
234# define EV_NSIG (SIG_MAX+1)
235#elif defined _SIG_MAX
236# define EV_NSIG (_SIG_MAX+1)
237#elif defined MAXSIG
238# define EV_NSIG (MAXSIG+1)
239#elif defined MAX_SIG
240# define EV_NSIG (MAX_SIG+1)
241#elif defined SIGARRAYSIZE
242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
243#elif defined _sys_nsig
244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
245#else
246# error "unable to find value for NSIG, please report"
247/* to make it compile regardless, just remove the above line, */
248/* but consider reporting it, too! :) */
249# define EV_NSIG 65
250#endif
251
252#ifndef EV_USE_FLOOR
253# define EV_USE_FLOOR 0
254#endif
255
256#ifndef EV_USE_CLOCK_SYSCALL
257# if __linux && __GLIBC__ >= 2
258# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
259# else
260# define EV_USE_CLOCK_SYSCALL 0
261# endif
262#endif
263
264#ifndef EV_USE_MONOTONIC
265# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
266# define EV_USE_MONOTONIC EV_FEATURE_OS
267# else
268# define EV_USE_MONOTONIC 0
269# endif
270#endif
271
272#ifndef EV_USE_REALTIME
273# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
274#endif
275
276#ifndef EV_USE_NANOSLEEP
277# if _POSIX_C_SOURCE >= 199309L
278# define EV_USE_NANOSLEEP EV_FEATURE_OS
279# else
280# define EV_USE_NANOSLEEP 0
281# endif
282#endif
283
284#ifndef EV_USE_SELECT
285# define EV_USE_SELECT EV_FEATURE_BACKENDS
286#endif
287
288#ifndef EV_USE_POLL
289# ifdef _WIN32
290# define EV_USE_POLL 0
291# else
292# define EV_USE_POLL EV_FEATURE_BACKENDS
293# endif
294#endif
295
296#ifndef EV_USE_EPOLL
297# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
298# define EV_USE_EPOLL EV_FEATURE_BACKENDS
299# else
300# define EV_USE_EPOLL 0
301# endif
302#endif
303
304#ifndef EV_USE_KQUEUE
305# define EV_USE_KQUEUE 0
306#endif
307
308#ifndef EV_USE_PORT
309# define EV_USE_PORT 0
310#endif
311
312#ifndef EV_USE_INOTIFY
313# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
314# define EV_USE_INOTIFY EV_FEATURE_OS
315# else
316# define EV_USE_INOTIFY 0
317# endif
318#endif
319
320#ifndef EV_PID_HASHSIZE
321# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
322#endif
323
324#ifndef EV_INOTIFY_HASHSIZE
325# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
326#endif
327
328#ifndef EV_USE_EVENTFD
329# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
330# define EV_USE_EVENTFD EV_FEATURE_OS
331# else
332# define EV_USE_EVENTFD 0
333# endif
334#endif
335
336#ifndef EV_USE_SIGNALFD
337# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
338# define EV_USE_SIGNALFD EV_FEATURE_OS
339# else
340# define EV_USE_SIGNALFD 0
341# endif
342#endif
343
344#if 0 /* debugging */
345# define EV_VERIFY 3
346# define EV_USE_4HEAP 1
347# define EV_HEAP_CACHE_AT 1
348#endif
349
350#ifndef EV_VERIFY
351# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
352#endif
353
354#ifndef EV_USE_4HEAP
355# define EV_USE_4HEAP EV_FEATURE_DATA
356#endif
357
358#ifndef EV_HEAP_CACHE_AT
359# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
360#endif
361
362/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
363/* which makes programs even slower. might work on other unices, too. */
364#if EV_USE_CLOCK_SYSCALL
365# include <sys/syscall.h>
366# ifdef SYS_clock_gettime
367# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
368# undef EV_USE_MONOTONIC
369# define EV_USE_MONOTONIC 1
370# else
371# undef EV_USE_CLOCK_SYSCALL
372# define EV_USE_CLOCK_SYSCALL 0
373# endif
374#endif
375
376/* this block fixes any misconfiguration where we know we run into trouble otherwise */
377
378#ifdef _AIX
379/* AIX has a completely broken poll.h header */
380# undef EV_USE_POLL
381# define EV_USE_POLL 0
382#endif
383
14#ifdef CLOCK_MONOTONIC 384#ifndef CLOCK_MONOTONIC
385# undef EV_USE_MONOTONIC
15# define HAVE_MONOTONIC 1 386# define EV_USE_MONOTONIC 0
387#endif
388
389#ifndef CLOCK_REALTIME
390# undef EV_USE_REALTIME
391# define EV_USE_REALTIME 0
392#endif
393
394#if !EV_STAT_ENABLE
395# undef EV_USE_INOTIFY
396# define EV_USE_INOTIFY 0
397#endif
398
399#if !EV_USE_NANOSLEEP
400/* hp-ux has it in sys/time.h, which we unconditionally include above */
401# if !defined _WIN32 && !defined __hpux
402# include <sys/select.h>
16#endif 403# endif
404#endif
17 405
18#define HAVE_REALTIME 1 406#if EV_USE_INOTIFY
19#define HAVE_EPOLL 1 407# include <sys/statfs.h>
20#define HAVE_SELECT 1 408# include <sys/inotify.h>
409/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
410# ifndef IN_DONT_FOLLOW
411# undef EV_USE_INOTIFY
412# define EV_USE_INOTIFY 0
413# endif
414#endif
415
416#if EV_USE_EVENTFD
417/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
418# include <stdint.h>
419# ifndef EFD_NONBLOCK
420# define EFD_NONBLOCK O_NONBLOCK
421# endif
422# ifndef EFD_CLOEXEC
423# ifdef O_CLOEXEC
424# define EFD_CLOEXEC O_CLOEXEC
425# else
426# define EFD_CLOEXEC 02000000
427# endif
428# endif
429EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
430#endif
431
432#if EV_USE_SIGNALFD
433/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
434# include <stdint.h>
435# ifndef SFD_NONBLOCK
436# define SFD_NONBLOCK O_NONBLOCK
437# endif
438# ifndef SFD_CLOEXEC
439# ifdef O_CLOEXEC
440# define SFD_CLOEXEC O_CLOEXEC
441# else
442# define SFD_CLOEXEC 02000000
443# endif
444# endif
445EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
446
447struct signalfd_siginfo
448{
449 uint32_t ssi_signo;
450 char pad[128 - sizeof (uint32_t)];
451};
452#endif
453
454/**/
455
456#if EV_VERIFY >= 3
457# define EV_FREQUENT_CHECK ev_verify (EV_A)
458#else
459# define EV_FREQUENT_CHECK do { } while (0)
460#endif
461
462/*
463 * This is used to work around floating point rounding problems.
464 * This value is good at least till the year 4000.
465 */
466#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
467/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
21 468
22#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 469#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
23#define MAX_BLOCKTIME 60. 470#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
24 471
472#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
473#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
474
475/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
476/* ECB.H BEGIN */
477/*
478 * libecb - http://software.schmorp.de/pkg/libecb
479 *
480 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
481 * Copyright (©) 2011 Emanuele Giaquinta
482 * All rights reserved.
483 *
484 * Redistribution and use in source and binary forms, with or without modifica-
485 * tion, are permitted provided that the following conditions are met:
486 *
487 * 1. Redistributions of source code must retain the above copyright notice,
488 * this list of conditions and the following disclaimer.
489 *
490 * 2. Redistributions in binary form must reproduce the above copyright
491 * notice, this list of conditions and the following disclaimer in the
492 * documentation and/or other materials provided with the distribution.
493 *
494 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
495 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
496 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
497 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
498 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
499 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
500 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
501 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
502 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
503 * OF THE POSSIBILITY OF SUCH DAMAGE.
504 */
505
506#ifndef ECB_H
507#define ECB_H
508
509/* 16 bits major, 16 bits minor */
510#define ECB_VERSION 0x00010001
511
512#ifdef _WIN32
513 typedef signed char int8_t;
514 typedef unsigned char uint8_t;
515 typedef signed short int16_t;
516 typedef unsigned short uint16_t;
517 typedef signed int int32_t;
518 typedef unsigned int uint32_t;
519 #if __GNUC__
520 typedef signed long long int64_t;
521 typedef unsigned long long uint64_t;
522 #else /* _MSC_VER || __BORLANDC__ */
523 typedef signed __int64 int64_t;
524 typedef unsigned __int64 uint64_t;
525 #endif
526 #ifdef _WIN64
527 #define ECB_PTRSIZE 8
528 typedef uint64_t uintptr_t;
529 typedef int64_t intptr_t;
530 #else
531 #define ECB_PTRSIZE 4
532 typedef uint32_t uintptr_t;
533 typedef int32_t intptr_t;
534 #endif
535 typedef intptr_t ptrdiff_t;
536#else
537 #include <inttypes.h>
538 #if UINTMAX_MAX > 0xffffffffU
539 #define ECB_PTRSIZE 8
540 #else
541 #define ECB_PTRSIZE 4
542 #endif
543#endif
544
545/* many compilers define _GNUC_ to some versions but then only implement
546 * what their idiot authors think are the "more important" extensions,
547 * causing enormous grief in return for some better fake benchmark numbers.
548 * or so.
549 * we try to detect these and simply assume they are not gcc - if they have
550 * an issue with that they should have done it right in the first place.
551 */
552#ifndef ECB_GCC_VERSION
553 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
554 #define ECB_GCC_VERSION(major,minor) 0
555 #else
556 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
557 #endif
558#endif
559
560#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
561#define ECB_C99 (__STDC_VERSION__ >= 199901L)
562#define ECB_C11 (__STDC_VERSION__ >= 201112L)
563#define ECB_CPP (__cplusplus+0)
564#define ECB_CPP98 (__cplusplus >= 199711L)
565#define ECB_CPP11 (__cplusplus >= 201103L)
566
567/*****************************************************************************/
568
569/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
570/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
571
572#if ECB_NO_THREADS
573 #define ECB_NO_SMP 1
574#endif
575
576#if ECB_NO_SMP
577 #define ECB_MEMORY_FENCE do { } while (0)
578#endif
579
580#ifndef ECB_MEMORY_FENCE
581 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
582 #if __i386 || __i386__
583 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
584 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
585 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
586 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
587 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
588 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
589 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
590 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
591 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
592 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
593 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
594 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
595 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
596 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
597 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
598 #elif __sparc || __sparc__
599 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
600 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
601 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
602 #elif defined __s390__ || defined __s390x__
603 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
604 #elif defined __mips__
605 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
606 #elif defined __alpha__
607 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
608 #elif defined __hppa__
609 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
610 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
611 #elif defined __ia64__
612 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
613 #endif
614 #endif
615#endif
616
617#ifndef ECB_MEMORY_FENCE
618 #if ECB_GCC_VERSION(4,7)
619 /* see comment below about the C11 memory model. in short - avoid */
620 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
621 #elif defined __clang && __has_feature (cxx_atomic)
622 /* see above */
623 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
624 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
625 #define ECB_MEMORY_FENCE __sync_synchronize ()
626 #elif _MSC_VER >= 1400 /* VC++ 2005 */
627 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
628 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
629 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
630 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
631 #elif defined _WIN32
632 #include <WinNT.h>
633 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
634 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
635 #include <mbarrier.h>
636 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
637 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
638 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
639 #elif __xlC__
640 #define ECB_MEMORY_FENCE __sync ()
641 #endif
642#endif
643
644#ifndef ECB_MEMORY_FENCE
645 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
646 /* we assume that these memory fences work on all variables/all memory accesses, */
647 /* not just C11 atomics and atomic accesses */
648 #include <stdatomic.h>
649 /* unfortunately, the C11 memory model seems to be very limited, and unable to express */
650 /* simple barrier semantics. That means we need to take out thor's hammer. */
651 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
652 #endif
653#endif
654
655#ifndef ECB_MEMORY_FENCE
656 #if !ECB_AVOID_PTHREADS
657 /*
658 * if you get undefined symbol references to pthread_mutex_lock,
659 * or failure to find pthread.h, then you should implement
660 * the ECB_MEMORY_FENCE operations for your cpu/compiler
661 * OR provide pthread.h and link against the posix thread library
662 * of your system.
663 */
664 #include <pthread.h>
665 #define ECB_NEEDS_PTHREADS 1
666 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
667
668 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
669 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
670 #endif
671#endif
672
673#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
674 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
675#endif
676
677#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
678 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
679#endif
680
681/*****************************************************************************/
682
683#if __cplusplus
684 #define ecb_inline static inline
685#elif ECB_GCC_VERSION(2,5)
686 #define ecb_inline static __inline__
687#elif ECB_C99
688 #define ecb_inline static inline
689#else
690 #define ecb_inline static
691#endif
692
693#if ECB_GCC_VERSION(3,3)
694 #define ecb_restrict __restrict__
695#elif ECB_C99
696 #define ecb_restrict restrict
697#else
698 #define ecb_restrict
699#endif
700
701typedef int ecb_bool;
702
703#define ECB_CONCAT_(a, b) a ## b
704#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
705#define ECB_STRINGIFY_(a) # a
706#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
707
708#define ecb_function_ ecb_inline
709
710#if ECB_GCC_VERSION(3,1)
711 #define ecb_attribute(attrlist) __attribute__(attrlist)
712 #define ecb_is_constant(expr) __builtin_constant_p (expr)
713 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
714 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
715#else
716 #define ecb_attribute(attrlist)
717 #define ecb_is_constant(expr) 0
718 #define ecb_expect(expr,value) (expr)
719 #define ecb_prefetch(addr,rw,locality)
720#endif
721
722/* no emulation for ecb_decltype */
723#if ECB_GCC_VERSION(4,5)
724 #define ecb_decltype(x) __decltype(x)
725#elif ECB_GCC_VERSION(3,0)
726 #define ecb_decltype(x) __typeof(x)
727#endif
728
729#define ecb_noinline ecb_attribute ((__noinline__))
730#define ecb_unused ecb_attribute ((__unused__))
731#define ecb_const ecb_attribute ((__const__))
732#define ecb_pure ecb_attribute ((__pure__))
733
734#if ECB_C11
735 #define ecb_noreturn _Noreturn
736#else
737 #define ecb_noreturn ecb_attribute ((__noreturn__))
738#endif
739
740#if ECB_GCC_VERSION(4,3)
741 #define ecb_artificial ecb_attribute ((__artificial__))
742 #define ecb_hot ecb_attribute ((__hot__))
743 #define ecb_cold ecb_attribute ((__cold__))
744#else
745 #define ecb_artificial
746 #define ecb_hot
747 #define ecb_cold
748#endif
749
750/* put around conditional expressions if you are very sure that the */
751/* expression is mostly true or mostly false. note that these return */
752/* booleans, not the expression. */
753#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
754#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
755/* for compatibility to the rest of the world */
756#define ecb_likely(expr) ecb_expect_true (expr)
757#define ecb_unlikely(expr) ecb_expect_false (expr)
758
759/* count trailing zero bits and count # of one bits */
760#if ECB_GCC_VERSION(3,4)
761 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
762 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
763 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
764 #define ecb_ctz32(x) __builtin_ctz (x)
765 #define ecb_ctz64(x) __builtin_ctzll (x)
766 #define ecb_popcount32(x) __builtin_popcount (x)
767 /* no popcountll */
768#else
769 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
770 ecb_function_ int
771 ecb_ctz32 (uint32_t x)
772 {
773 int r = 0;
774
775 x &= ~x + 1; /* this isolates the lowest bit */
776
777#if ECB_branchless_on_i386
778 r += !!(x & 0xaaaaaaaa) << 0;
779 r += !!(x & 0xcccccccc) << 1;
780 r += !!(x & 0xf0f0f0f0) << 2;
781 r += !!(x & 0xff00ff00) << 3;
782 r += !!(x & 0xffff0000) << 4;
783#else
784 if (x & 0xaaaaaaaa) r += 1;
785 if (x & 0xcccccccc) r += 2;
786 if (x & 0xf0f0f0f0) r += 4;
787 if (x & 0xff00ff00) r += 8;
788 if (x & 0xffff0000) r += 16;
789#endif
790
791 return r;
792 }
793
794 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
795 ecb_function_ int
796 ecb_ctz64 (uint64_t x)
797 {
798 int shift = x & 0xffffffffU ? 0 : 32;
799 return ecb_ctz32 (x >> shift) + shift;
800 }
801
802 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
803 ecb_function_ int
804 ecb_popcount32 (uint32_t x)
805 {
806 x -= (x >> 1) & 0x55555555;
807 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
808 x = ((x >> 4) + x) & 0x0f0f0f0f;
809 x *= 0x01010101;
810
811 return x >> 24;
812 }
813
814 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
815 ecb_function_ int ecb_ld32 (uint32_t x)
816 {
817 int r = 0;
818
819 if (x >> 16) { x >>= 16; r += 16; }
820 if (x >> 8) { x >>= 8; r += 8; }
821 if (x >> 4) { x >>= 4; r += 4; }
822 if (x >> 2) { x >>= 2; r += 2; }
823 if (x >> 1) { r += 1; }
824
825 return r;
826 }
827
828 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
829 ecb_function_ int ecb_ld64 (uint64_t x)
830 {
831 int r = 0;
832
833 if (x >> 32) { x >>= 32; r += 32; }
834
835 return r + ecb_ld32 (x);
836 }
837#endif
838
839ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
840ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
841ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
842ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
843
844ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
845ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
846{
847 return ( (x * 0x0802U & 0x22110U)
848 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
849}
850
851ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
852ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
853{
854 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
855 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
856 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
857 x = ( x >> 8 ) | ( x << 8);
858
859 return x;
860}
861
862ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
863ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
864{
865 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
866 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
867 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
868 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
869 x = ( x >> 16 ) | ( x << 16);
870
871 return x;
872}
873
874/* popcount64 is only available on 64 bit cpus as gcc builtin */
875/* so for this version we are lazy */
876ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
877ecb_function_ int
878ecb_popcount64 (uint64_t x)
879{
880 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
881}
882
883ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
884ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
885ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
886ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
887ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
888ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
889ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
890ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
891
892ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
893ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
894ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
895ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
896ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
897ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
898ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
899ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
900
901#if ECB_GCC_VERSION(4,3)
902 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
903 #define ecb_bswap32(x) __builtin_bswap32 (x)
904 #define ecb_bswap64(x) __builtin_bswap64 (x)
905#else
906 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
907 ecb_function_ uint16_t
908 ecb_bswap16 (uint16_t x)
909 {
910 return ecb_rotl16 (x, 8);
911 }
912
913 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
914 ecb_function_ uint32_t
915 ecb_bswap32 (uint32_t x)
916 {
917 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
918 }
919
920 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
921 ecb_function_ uint64_t
922 ecb_bswap64 (uint64_t x)
923 {
924 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
925 }
926#endif
927
928#if ECB_GCC_VERSION(4,5)
929 #define ecb_unreachable() __builtin_unreachable ()
930#else
931 /* this seems to work fine, but gcc always emits a warning for it :/ */
932 ecb_inline void ecb_unreachable (void) ecb_noreturn;
933 ecb_inline void ecb_unreachable (void) { }
934#endif
935
936/* try to tell the compiler that some condition is definitely true */
937#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
938
939ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
940ecb_inline unsigned char
941ecb_byteorder_helper (void)
942{
943 const uint32_t u = 0x11223344;
944 return *(unsigned char *)&u;
945}
946
947ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
948ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
949ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
950ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
951
952#if ECB_GCC_VERSION(3,0) || ECB_C99
953 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
954#else
955 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
956#endif
957
958#if __cplusplus
959 template<typename T>
960 static inline T ecb_div_rd (T val, T div)
961 {
962 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
963 }
964 template<typename T>
965 static inline T ecb_div_ru (T val, T div)
966 {
967 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
968 }
969#else
970 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
971 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
972#endif
973
974#if ecb_cplusplus_does_not_suck
975 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
976 template<typename T, int N>
977 static inline int ecb_array_length (const T (&arr)[N])
978 {
979 return N;
980 }
981#else
982 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
983#endif
984
985#endif
986
987/* ECB.H END */
988
989#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
990/* if your architecture doesn't need memory fences, e.g. because it is
991 * single-cpu/core, or if you use libev in a project that doesn't use libev
992 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
993 * libev, in which cases the memory fences become nops.
994 * alternatively, you can remove this #error and link against libpthread,
995 * which will then provide the memory fences.
996 */
997# error "memory fences not defined for your architecture, please report"
998#endif
999
1000#ifndef ECB_MEMORY_FENCE
1001# define ECB_MEMORY_FENCE do { } while (0)
1002# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1003# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1004#endif
1005
1006#define expect_false(cond) ecb_expect_false (cond)
1007#define expect_true(cond) ecb_expect_true (cond)
1008#define noinline ecb_noinline
1009
1010#define inline_size ecb_inline
1011
1012#if EV_FEATURE_CODE
1013# define inline_speed ecb_inline
1014#else
1015# define inline_speed static noinline
1016#endif
1017
1018#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1019
1020#if EV_MINPRI == EV_MAXPRI
1021# define ABSPRI(w) (((W)w), 0)
1022#else
1023# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1024#endif
1025
1026#define EMPTY /* required for microsofts broken pseudo-c compiler */
1027#define EMPTY2(a,b) /* used to suppress some warnings */
1028
1029typedef ev_watcher *W;
1030typedef ev_watcher_list *WL;
1031typedef ev_watcher_time *WT;
1032
1033#define ev_active(w) ((W)(w))->active
1034#define ev_at(w) ((WT)(w))->at
1035
1036#if EV_USE_REALTIME
1037/* sig_atomic_t is used to avoid per-thread variables or locking but still */
1038/* giving it a reasonably high chance of working on typical architectures */
1039static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1040#endif
1041
1042#if EV_USE_MONOTONIC
1043static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1044#endif
1045
1046#ifndef EV_FD_TO_WIN32_HANDLE
1047# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1048#endif
1049#ifndef EV_WIN32_HANDLE_TO_FD
1050# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1051#endif
1052#ifndef EV_WIN32_CLOSE_FD
1053# define EV_WIN32_CLOSE_FD(fd) close (fd)
1054#endif
1055
1056#ifdef _WIN32
25#include "ev.h" 1057# include "ev_win32.c"
1058#endif
26 1059
27struct ev_watcher { 1060/*****************************************************************************/
28 EV_WATCHER (ev_watcher);
29};
30 1061
31struct ev_watcher_list { 1062/* define a suitable floor function (only used by periodics atm) */
32 EV_WATCHER_LIST (ev_watcher_list);
33};
34 1063
35static ev_tstamp now, diff; /* monotonic clock */ 1064#if EV_USE_FLOOR
1065# include <math.h>
1066# define ev_floor(v) floor (v)
1067#else
1068
1069#include <float.h>
1070
1071/* a floor() replacement function, should be independent of ev_tstamp type */
1072static ev_tstamp noinline
1073ev_floor (ev_tstamp v)
1074{
1075 /* the choice of shift factor is not terribly important */
1076#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1077 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1078#else
1079 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1080#endif
1081
1082 /* argument too large for an unsigned long? */
1083 if (expect_false (v >= shift))
1084 {
1085 ev_tstamp f;
1086
1087 if (v == v - 1.)
1088 return v; /* very large number */
1089
1090 f = shift * ev_floor (v * (1. / shift));
1091 return f + ev_floor (v - f);
1092 }
1093
1094 /* special treatment for negative args? */
1095 if (expect_false (v < 0.))
1096 {
1097 ev_tstamp f = -ev_floor (-v);
1098
1099 return f - (f == v ? 0 : 1);
1100 }
1101
1102 /* fits into an unsigned long */
1103 return (unsigned long)v;
1104}
1105
1106#endif
1107
1108/*****************************************************************************/
1109
1110#ifdef __linux
1111# include <sys/utsname.h>
1112#endif
1113
1114static unsigned int noinline ecb_cold
1115ev_linux_version (void)
1116{
1117#ifdef __linux
1118 unsigned int v = 0;
1119 struct utsname buf;
1120 int i;
1121 char *p = buf.release;
1122
1123 if (uname (&buf))
1124 return 0;
1125
1126 for (i = 3+1; --i; )
1127 {
1128 unsigned int c = 0;
1129
1130 for (;;)
1131 {
1132 if (*p >= '0' && *p <= '9')
1133 c = c * 10 + *p++ - '0';
1134 else
1135 {
1136 p += *p == '.';
1137 break;
1138 }
1139 }
1140
1141 v = (v << 8) | c;
1142 }
1143
1144 return v;
1145#else
1146 return 0;
1147#endif
1148}
1149
1150/*****************************************************************************/
1151
1152#if EV_AVOID_STDIO
1153static void noinline ecb_cold
1154ev_printerr (const char *msg)
1155{
1156 write (STDERR_FILENO, msg, strlen (msg));
1157}
1158#endif
1159
1160static void (*syserr_cb)(const char *msg) EV_THROW;
1161
1162void ecb_cold
1163ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
1164{
1165 syserr_cb = cb;
1166}
1167
1168static void noinline ecb_cold
1169ev_syserr (const char *msg)
1170{
1171 if (!msg)
1172 msg = "(libev) system error";
1173
1174 if (syserr_cb)
1175 syserr_cb (msg);
1176 else
1177 {
1178#if EV_AVOID_STDIO
1179 ev_printerr (msg);
1180 ev_printerr (": ");
1181 ev_printerr (strerror (errno));
1182 ev_printerr ("\n");
1183#else
1184 perror (msg);
1185#endif
1186 abort ();
1187 }
1188}
1189
1190static void *
1191ev_realloc_emul (void *ptr, long size) EV_THROW
1192{
1193#if __GLIBC__
1194 return realloc (ptr, size);
1195#else
1196 /* some systems, notably openbsd and darwin, fail to properly
1197 * implement realloc (x, 0) (as required by both ansi c-89 and
1198 * the single unix specification, so work around them here.
1199 */
1200
1201 if (size)
1202 return realloc (ptr, size);
1203
1204 free (ptr);
1205 return 0;
1206#endif
1207}
1208
1209static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
1210
1211void ecb_cold
1212ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
1213{
1214 alloc = cb;
1215}
1216
1217inline_speed void *
1218ev_realloc (void *ptr, long size)
1219{
1220 ptr = alloc (ptr, size);
1221
1222 if (!ptr && size)
1223 {
1224#if EV_AVOID_STDIO
1225 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1226#else
1227 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1228#endif
1229 abort ();
1230 }
1231
1232 return ptr;
1233}
1234
1235#define ev_malloc(size) ev_realloc (0, (size))
1236#define ev_free(ptr) ev_realloc ((ptr), 0)
1237
1238/*****************************************************************************/
1239
1240/* set in reify when reification needed */
1241#define EV_ANFD_REIFY 1
1242
1243/* file descriptor info structure */
1244typedef struct
1245{
1246 WL head;
1247 unsigned char events; /* the events watched for */
1248 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1249 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
1250 unsigned char unused;
1251#if EV_USE_EPOLL
1252 unsigned int egen; /* generation counter to counter epoll bugs */
1253#endif
1254#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1255 SOCKET handle;
1256#endif
1257#if EV_USE_IOCP
1258 OVERLAPPED or, ow;
1259#endif
1260} ANFD;
1261
1262/* stores the pending event set for a given watcher */
1263typedef struct
1264{
1265 W w;
1266 int events; /* the pending event set for the given watcher */
1267} ANPENDING;
1268
1269#if EV_USE_INOTIFY
1270/* hash table entry per inotify-id */
1271typedef struct
1272{
1273 WL head;
1274} ANFS;
1275#endif
1276
1277/* Heap Entry */
1278#if EV_HEAP_CACHE_AT
1279 /* a heap element */
1280 typedef struct {
1281 ev_tstamp at;
1282 WT w;
1283 } ANHE;
1284
1285 #define ANHE_w(he) (he).w /* access watcher, read-write */
1286 #define ANHE_at(he) (he).at /* access cached at, read-only */
1287 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1288#else
1289 /* a heap element */
1290 typedef WT ANHE;
1291
1292 #define ANHE_w(he) (he)
1293 #define ANHE_at(he) (he)->at
1294 #define ANHE_at_cache(he)
1295#endif
1296
1297#if EV_MULTIPLICITY
1298
1299 struct ev_loop
1300 {
36ev_tstamp ev_now; 1301 ev_tstamp ev_rt_now;
37int ev_method; 1302 #define ev_rt_now ((loop)->ev_rt_now)
1303 #define VAR(name,decl) decl;
1304 #include "ev_vars.h"
1305 #undef VAR
1306 };
1307 #include "ev_wrap.h"
38 1308
39static int have_monotonic; /* runtime */ 1309 static struct ev_loop default_loop_struct;
1310 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
40 1311
41static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 1312#else
42static void (*method_modify)(int fd, int oev, int nev);
43static void (*method_poll)(ev_tstamp timeout);
44 1313
1314 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
1315 #define VAR(name,decl) static decl;
1316 #include "ev_vars.h"
1317 #undef VAR
1318
1319 static int ev_default_loop_ptr;
1320
1321#endif
1322
1323#if EV_FEATURE_API
1324# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1325# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1326# define EV_INVOKE_PENDING invoke_cb (EV_A)
1327#else
1328# define EV_RELEASE_CB (void)0
1329# define EV_ACQUIRE_CB (void)0
1330# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1331#endif
1332
1333#define EVBREAK_RECURSE 0x80
1334
1335/*****************************************************************************/
1336
1337#ifndef EV_HAVE_EV_TIME
45ev_tstamp 1338ev_tstamp
46ev_time (void) 1339ev_time (void) EV_THROW
47{ 1340{
48#if HAVE_REALTIME 1341#if EV_USE_REALTIME
1342 if (expect_true (have_realtime))
1343 {
49 struct timespec ts; 1344 struct timespec ts;
50 clock_gettime (CLOCK_REALTIME, &ts); 1345 clock_gettime (CLOCK_REALTIME, &ts);
51 return ts.tv_sec + ts.tv_nsec * 1e-9; 1346 return ts.tv_sec + ts.tv_nsec * 1e-9;
52#else 1347 }
1348#endif
1349
53 struct timeval tv; 1350 struct timeval tv;
54 gettimeofday (&tv, 0); 1351 gettimeofday (&tv, 0);
55 return tv.tv_sec + tv.tv_usec * 1e-6; 1352 return tv.tv_sec + tv.tv_usec * 1e-6;
56#endif
57} 1353}
1354#endif
58 1355
59static ev_tstamp 1356inline_size ev_tstamp
60get_clock (void) 1357get_clock (void)
61{ 1358{
62#if HAVE_MONOTONIC 1359#if EV_USE_MONOTONIC
63 if (have_monotonic) 1360 if (expect_true (have_monotonic))
64 { 1361 {
65 struct timespec ts; 1362 struct timespec ts;
66 clock_gettime (CLOCK_MONOTONIC, &ts); 1363 clock_gettime (CLOCK_MONOTONIC, &ts);
67 return ts.tv_sec + ts.tv_nsec * 1e-9; 1364 return ts.tv_sec + ts.tv_nsec * 1e-9;
68 } 1365 }
69#endif 1366#endif
70 1367
71 return ev_time (); 1368 return ev_time ();
72} 1369}
73 1370
1371#if EV_MULTIPLICITY
1372ev_tstamp
1373ev_now (EV_P) EV_THROW
1374{
1375 return ev_rt_now;
1376}
1377#endif
1378
1379void
1380ev_sleep (ev_tstamp delay) EV_THROW
1381{
1382 if (delay > 0.)
1383 {
1384#if EV_USE_NANOSLEEP
1385 struct timespec ts;
1386
1387 EV_TS_SET (ts, delay);
1388 nanosleep (&ts, 0);
1389#elif defined _WIN32
1390 Sleep ((unsigned long)(delay * 1e3));
1391#else
1392 struct timeval tv;
1393
1394 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1395 /* something not guaranteed by newer posix versions, but guaranteed */
1396 /* by older ones */
1397 EV_TV_SET (tv, delay);
1398 select (0, 0, 0, 0, &tv);
1399#endif
1400 }
1401}
1402
1403/*****************************************************************************/
1404
1405#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1406
1407/* find a suitable new size for the given array, */
1408/* hopefully by rounding to a nice-to-malloc size */
1409inline_size int
1410array_nextsize (int elem, int cur, int cnt)
1411{
1412 int ncur = cur + 1;
1413
1414 do
1415 ncur <<= 1;
1416 while (cnt > ncur);
1417
1418 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
1419 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
1420 {
1421 ncur *= elem;
1422 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
1423 ncur = ncur - sizeof (void *) * 4;
1424 ncur /= elem;
1425 }
1426
1427 return ncur;
1428}
1429
1430static void * noinline ecb_cold
1431array_realloc (int elem, void *base, int *cur, int cnt)
1432{
1433 *cur = array_nextsize (elem, *cur, cnt);
1434 return ev_realloc (base, elem * *cur);
1435}
1436
1437#define array_init_zero(base,count) \
1438 memset ((void *)(base), 0, sizeof (*(base)) * (count))
1439
74#define array_needsize(base,cur,cnt,init) \ 1440#define array_needsize(type,base,cur,cnt,init) \
75 if ((cnt) > cur) \ 1441 if (expect_false ((cnt) > (cur))) \
76 { \ 1442 { \
77 int newcnt = cur ? cur << 1 : 16; \ 1443 int ecb_unused ocur_ = (cur); \
78 fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\ 1444 (base) = (type *)array_realloc \
79 base = realloc (base, sizeof (*base) * (newcnt)); \ 1445 (sizeof (type), (base), &(cur), (cnt)); \
80 init (base + cur, newcnt - cur); \ 1446 init ((base) + (ocur_), (cur) - ocur_); \
81 cur = newcnt; \
82 }
83
84typedef struct
85{
86 struct ev_io *head;
87 unsigned char wev, rev; /* want, received event set */
88} ANFD;
89
90static ANFD *anfds;
91static int anfdmax;
92
93static int *fdchanges;
94static int fdchangemax, fdchangecnt;
95
96static void
97anfds_init (ANFD *base, int count)
98{
99 while (count--)
100 { 1447 }
101 base->head = 0;
102 base->wev = base->rev = EV_NONE;
103 ++base;
104 }
105}
106 1448
107typedef struct 1449#if 0
108{ 1450#define array_slim(type,stem) \
109 struct ev_watcher *w; 1451 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
110 int events; 1452 { \
111} ANPENDING; 1453 stem ## max = array_roundsize (stem ## cnt >> 1); \
1454 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
1455 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
1456 }
1457#endif
112 1458
113static ANPENDING *pendings; 1459#define array_free(stem, idx) \
114static int pendingmax, pendingcnt; 1460 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
115 1461
116static void 1462/*****************************************************************************/
117event (struct ev_watcher *w, int events) 1463
1464/* dummy callback for pending events */
1465static void noinline
1466pendingcb (EV_P_ ev_prepare *w, int revents)
118{ 1467{
119 w->pending = ++pendingcnt; 1468}
120 array_needsize (pendings, pendingmax, pendingcnt, ); 1469
121 pendings [pendingcnt - 1].w = w; 1470void noinline
1471ev_feed_event (EV_P_ void *w, int revents) EV_THROW
1472{
1473 W w_ = (W)w;
1474 int pri = ABSPRI (w_);
1475
1476 if (expect_false (w_->pending))
122 pendings [pendingcnt - 1].events = events; 1477 pendings [pri][w_->pending - 1].events |= revents;
123} 1478 else
1479 {
1480 w_->pending = ++pendingcnt [pri];
1481 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1482 pendings [pri][w_->pending - 1].w = w_;
1483 pendings [pri][w_->pending - 1].events = revents;
1484 }
124 1485
125static void 1486 pendingpri = NUMPRI - 1;
1487}
1488
1489inline_speed void
1490feed_reverse (EV_P_ W w)
1491{
1492 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1493 rfeeds [rfeedcnt++] = w;
1494}
1495
1496inline_size void
1497feed_reverse_done (EV_P_ int revents)
1498{
1499 do
1500 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1501 while (rfeedcnt);
1502}
1503
1504inline_speed void
1505queue_events (EV_P_ W *events, int eventcnt, int type)
1506{
1507 int i;
1508
1509 for (i = 0; i < eventcnt; ++i)
1510 ev_feed_event (EV_A_ events [i], type);
1511}
1512
1513/*****************************************************************************/
1514
1515inline_speed void
126fd_event (int fd, int events) 1516fd_event_nocheck (EV_P_ int fd, int revents)
127{ 1517{
128 ANFD *anfd = anfds + fd; 1518 ANFD *anfd = anfds + fd;
129 struct ev_io *w; 1519 ev_io *w;
130 1520
131 for (w = anfd->head; w; w = w->next) 1521 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
132 { 1522 {
133 int ev = w->events & events; 1523 int ev = w->events & revents;
134 1524
135 if (ev) 1525 if (ev)
136 event ((struct ev_watcher *)w, ev); 1526 ev_feed_event (EV_A_ (W)w, ev);
137 }
138}
139
140static struct ev_timer **atimers;
141static int atimermax, atimercnt;
142
143static struct ev_timer **rtimers;
144static int rtimermax, rtimercnt;
145
146static void
147upheap (struct ev_timer **timers, int k)
148{
149 struct ev_timer *w = timers [k];
150
151 while (k && timers [k >> 1]->at > w->at)
152 {
153 timers [k] = timers [k >> 1];
154 timers [k]->active = k + 1;
155 k >>= 1;
156 }
157
158 timers [k] = w;
159 timers [k]->active = k + 1;
160
161}
162
163static void
164downheap (struct ev_timer **timers, int N, int k)
165{
166 struct ev_timer *w = timers [k];
167
168 while (k < (N >> 1))
169 {
170 int j = k << 1;
171
172 if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
173 ++j;
174
175 if (w->at <= timers [j]->at)
176 break;
177
178 timers [k] = timers [j];
179 timers [k]->active = k + 1;
180 k = j;
181 }
182
183 timers [k] = w;
184 timers [k]->active = k + 1;
185}
186
187typedef struct
188{
189 struct ev_signal *head;
190 sig_atomic_t gotsig;
191} ANSIG;
192
193static ANSIG *signals;
194static int signalmax;
195
196static int sigpipe [2];
197static sig_atomic_t gotsig;
198static struct ev_io sigev;
199
200static void
201signals_init (ANSIG *base, int count)
202{
203 while (count--)
204 {
205 base->head = 0;
206 base->gotsig = 0;
207 ++base;
208 }
209}
210
211static void
212sighandler (int signum)
213{
214 signals [signum - 1].gotsig = 1;
215
216 if (!gotsig)
217 {
218 gotsig = 1;
219 write (sigpipe [1], &gotsig, 1);
220 }
221}
222
223static void
224sigcb (struct ev_io *iow, int revents)
225{
226 struct ev_signal *w;
227 int sig;
228
229 gotsig = 0;
230 read (sigpipe [0], &revents, 1);
231
232 for (sig = signalmax; sig--; )
233 if (signals [sig].gotsig)
234 {
235 signals [sig].gotsig = 0;
236
237 for (w = signals [sig].head; w; w = w->next)
238 event ((struct ev_watcher *)w, EV_SIGNAL);
239 } 1527 }
240} 1528}
241 1529
242static void 1530/* do not submit kernel events for fds that have reify set */
243siginit (void) 1531/* because that means they changed while we were polling for new events */
1532inline_speed void
1533fd_event (EV_P_ int fd, int revents)
244{ 1534{
245 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC); 1535 ANFD *anfd = anfds + fd;
246 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
247 1536
248 /* rather than sort out wether we really need nb, set it */ 1537 if (expect_true (!anfd->reify))
249 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); 1538 fd_event_nocheck (EV_A_ fd, revents);
250 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
251
252 evio_set (&sigev, sigpipe [0], EV_READ);
253 evio_start (&sigev);
254} 1539}
255 1540
256#if HAVE_EPOLL 1541void
257# include "ev_epoll.c" 1542ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
258#endif
259#if HAVE_SELECT
260# include "ev_select.c"
261#endif
262
263int ev_init (int flags)
264{ 1543{
265#if HAVE_MONOTONIC 1544 if (fd >= 0 && fd < anfdmax)
266 { 1545 fd_event_nocheck (EV_A_ fd, revents);
267 struct timespec ts;
268 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
269 have_monotonic = 1;
270 }
271#endif
272
273 ev_now = ev_time ();
274 now = get_clock ();
275 diff = ev_now - now;
276
277 if (pipe (sigpipe))
278 return 0;
279
280 ev_method = EVMETHOD_NONE;
281#if HAVE_EPOLL
282 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
283#endif
284#if HAVE_SELECT
285 if (ev_method == EVMETHOD_NONE) select_init (flags);
286#endif
287
288 if (ev_method)
289 {
290 evw_init (&sigev, sigcb, 0);
291 siginit ();
292 }
293
294 return ev_method;
295} 1546}
296 1547
297void ev_prefork (void) 1548/* make sure the external fd watch events are in-sync */
298{ 1549/* with the kernel/libev internal state */
299} 1550inline_size void
300 1551fd_reify (EV_P)
301void ev_postfork_parent (void)
302{
303}
304
305void ev_postfork_child (void)
306{
307#if HAVE_EPOLL
308 if (ev_method == EVMETHOD_EPOLL)
309 epoll_postfork_child ();
310#endif
311
312 evio_stop (&sigev);
313 close (sigpipe [0]);
314 close (sigpipe [1]);
315 pipe (sigpipe);
316 siginit ();
317}
318
319static void
320fd_reify (void)
321{ 1552{
322 int i; 1553 int i;
323 1554
1555#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
324 for (i = 0; i < fdchangecnt; ++i) 1556 for (i = 0; i < fdchangecnt; ++i)
325 { 1557 {
326 int fd = fdchanges [i]; 1558 int fd = fdchanges [i];
327 ANFD *anfd = anfds + fd; 1559 ANFD *anfd = anfds + fd;
328 struct ev_io *w;
329 1560
330 int wev = 0; 1561 if (anfd->reify & EV__IOFDSET && anfd->head)
331
332 for (w = anfd->head; w; w = w->next)
333 wev |= w->events;
334
335 if (anfd->wev != wev)
336 { 1562 {
337 method_modify (fd, anfd->wev, wev); 1563 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1564
1565 if (handle != anfd->handle)
1566 {
1567 unsigned long arg;
1568
1569 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1570
1571 /* handle changed, but fd didn't - we need to do it in two steps */
1572 backend_modify (EV_A_ fd, anfd->events, 0);
338 anfd->wev = wev; 1573 anfd->events = 0;
1574 anfd->handle = handle;
1575 }
339 } 1576 }
340 } 1577 }
1578#endif
1579
1580 for (i = 0; i < fdchangecnt; ++i)
1581 {
1582 int fd = fdchanges [i];
1583 ANFD *anfd = anfds + fd;
1584 ev_io *w;
1585
1586 unsigned char o_events = anfd->events;
1587 unsigned char o_reify = anfd->reify;
1588
1589 anfd->reify = 0;
1590
1591 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1592 {
1593 anfd->events = 0;
1594
1595 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1596 anfd->events |= (unsigned char)w->events;
1597
1598 if (o_events != anfd->events)
1599 o_reify = EV__IOFDSET; /* actually |= */
1600 }
1601
1602 if (o_reify & EV__IOFDSET)
1603 backend_modify (EV_A_ fd, o_events, anfd->events);
1604 }
341 1605
342 fdchangecnt = 0; 1606 fdchangecnt = 0;
343} 1607}
344 1608
1609/* something about the given fd changed */
1610inline_size void
1611fd_change (EV_P_ int fd, int flags)
1612{
1613 unsigned char reify = anfds [fd].reify;
1614 anfds [fd].reify |= flags;
1615
1616 if (expect_true (!reify))
1617 {
1618 ++fdchangecnt;
1619 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
1620 fdchanges [fdchangecnt - 1] = fd;
1621 }
1622}
1623
1624/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1625inline_speed void ecb_cold
1626fd_kill (EV_P_ int fd)
1627{
1628 ev_io *w;
1629
1630 while ((w = (ev_io *)anfds [fd].head))
1631 {
1632 ev_io_stop (EV_A_ w);
1633 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1634 }
1635}
1636
1637/* check whether the given fd is actually valid, for error recovery */
1638inline_size int ecb_cold
1639fd_valid (int fd)
1640{
1641#ifdef _WIN32
1642 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1643#else
1644 return fcntl (fd, F_GETFD) != -1;
1645#endif
1646}
1647
1648/* called on EBADF to verify fds */
1649static void noinline ecb_cold
1650fd_ebadf (EV_P)
1651{
1652 int fd;
1653
1654 for (fd = 0; fd < anfdmax; ++fd)
1655 if (anfds [fd].events)
1656 if (!fd_valid (fd) && errno == EBADF)
1657 fd_kill (EV_A_ fd);
1658}
1659
1660/* called on ENOMEM in select/poll to kill some fds and retry */
1661static void noinline ecb_cold
1662fd_enomem (EV_P)
1663{
1664 int fd;
1665
1666 for (fd = anfdmax; fd--; )
1667 if (anfds [fd].events)
1668 {
1669 fd_kill (EV_A_ fd);
1670 break;
1671 }
1672}
1673
1674/* usually called after fork if backend needs to re-arm all fds from scratch */
1675static void noinline
1676fd_rearm_all (EV_P)
1677{
1678 int fd;
1679
1680 for (fd = 0; fd < anfdmax; ++fd)
1681 if (anfds [fd].events)
1682 {
1683 anfds [fd].events = 0;
1684 anfds [fd].emask = 0;
1685 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1686 }
1687}
1688
1689/* used to prepare libev internal fd's */
1690/* this is not fork-safe */
1691inline_speed void
1692fd_intern (int fd)
1693{
1694#ifdef _WIN32
1695 unsigned long arg = 1;
1696 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1697#else
1698 fcntl (fd, F_SETFD, FD_CLOEXEC);
1699 fcntl (fd, F_SETFL, O_NONBLOCK);
1700#endif
1701}
1702
1703/*****************************************************************************/
1704
1705/*
1706 * the heap functions want a real array index. array index 0 is guaranteed to not
1707 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1708 * the branching factor of the d-tree.
1709 */
1710
1711/*
1712 * at the moment we allow libev the luxury of two heaps,
1713 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1714 * which is more cache-efficient.
1715 * the difference is about 5% with 50000+ watchers.
1716 */
1717#if EV_USE_4HEAP
1718
1719#define DHEAP 4
1720#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1721#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1722#define UPHEAP_DONE(p,k) ((p) == (k))
1723
1724/* away from the root */
1725inline_speed void
1726downheap (ANHE *heap, int N, int k)
1727{
1728 ANHE he = heap [k];
1729 ANHE *E = heap + N + HEAP0;
1730
1731 for (;;)
1732 {
1733 ev_tstamp minat;
1734 ANHE *minpos;
1735 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1736
1737 /* find minimum child */
1738 if (expect_true (pos + DHEAP - 1 < E))
1739 {
1740 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1741 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1742 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1743 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1744 }
1745 else if (pos < E)
1746 {
1747 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1748 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1749 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1750 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1751 }
1752 else
1753 break;
1754
1755 if (ANHE_at (he) <= minat)
1756 break;
1757
1758 heap [k] = *minpos;
1759 ev_active (ANHE_w (*minpos)) = k;
1760
1761 k = minpos - heap;
1762 }
1763
1764 heap [k] = he;
1765 ev_active (ANHE_w (he)) = k;
1766}
1767
1768#else /* 4HEAP */
1769
1770#define HEAP0 1
1771#define HPARENT(k) ((k) >> 1)
1772#define UPHEAP_DONE(p,k) (!(p))
1773
1774/* away from the root */
1775inline_speed void
1776downheap (ANHE *heap, int N, int k)
1777{
1778 ANHE he = heap [k];
1779
1780 for (;;)
1781 {
1782 int c = k << 1;
1783
1784 if (c >= N + HEAP0)
1785 break;
1786
1787 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1788 ? 1 : 0;
1789
1790 if (ANHE_at (he) <= ANHE_at (heap [c]))
1791 break;
1792
1793 heap [k] = heap [c];
1794 ev_active (ANHE_w (heap [k])) = k;
1795
1796 k = c;
1797 }
1798
1799 heap [k] = he;
1800 ev_active (ANHE_w (he)) = k;
1801}
1802#endif
1803
1804/* towards the root */
1805inline_speed void
1806upheap (ANHE *heap, int k)
1807{
1808 ANHE he = heap [k];
1809
1810 for (;;)
1811 {
1812 int p = HPARENT (k);
1813
1814 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1815 break;
1816
1817 heap [k] = heap [p];
1818 ev_active (ANHE_w (heap [k])) = k;
1819 k = p;
1820 }
1821
1822 heap [k] = he;
1823 ev_active (ANHE_w (he)) = k;
1824}
1825
1826/* move an element suitably so it is in a correct place */
1827inline_size void
1828adjustheap (ANHE *heap, int N, int k)
1829{
1830 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1831 upheap (heap, k);
1832 else
1833 downheap (heap, N, k);
1834}
1835
1836/* rebuild the heap: this function is used only once and executed rarely */
1837inline_size void
1838reheap (ANHE *heap, int N)
1839{
1840 int i;
1841
1842 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1843 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1844 for (i = 0; i < N; ++i)
1845 upheap (heap, i + HEAP0);
1846}
1847
1848/*****************************************************************************/
1849
1850/* associate signal watchers to a signal signal */
1851typedef struct
1852{
1853 EV_ATOMIC_T pending;
1854#if EV_MULTIPLICITY
1855 EV_P;
1856#endif
1857 WL head;
1858} ANSIG;
1859
1860static ANSIG signals [EV_NSIG - 1];
1861
1862/*****************************************************************************/
1863
1864#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1865
1866static void noinline ecb_cold
1867evpipe_init (EV_P)
1868{
1869 if (!ev_is_active (&pipe_w))
1870 {
1871# if EV_USE_EVENTFD
1872 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1873 if (evfd < 0 && errno == EINVAL)
1874 evfd = eventfd (0, 0);
1875
1876 if (evfd >= 0)
1877 {
1878 evpipe [0] = -1;
1879 fd_intern (evfd); /* doing it twice doesn't hurt */
1880 ev_io_set (&pipe_w, evfd, EV_READ);
1881 }
1882 else
1883# endif
1884 {
1885 while (pipe (evpipe))
1886 ev_syserr ("(libev) error creating signal/async pipe");
1887
1888 fd_intern (evpipe [0]);
1889 fd_intern (evpipe [1]);
1890 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1891 }
1892
1893 ev_io_start (EV_A_ &pipe_w);
1894 ev_unref (EV_A); /* watcher should not keep loop alive */
1895 }
1896}
1897
1898inline_speed void
1899evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1900{
1901 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1902
1903 if (expect_true (*flag))
1904 return;
1905
1906 *flag = 1;
1907 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1908
1909 pipe_write_skipped = 1;
1910
1911 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1912
1913 if (pipe_write_wanted)
1914 {
1915 int old_errno;
1916
1917 pipe_write_skipped = 0;
1918 ECB_MEMORY_FENCE_RELEASE;
1919
1920 old_errno = errno; /* save errno because write will clobber it */
1921
1922#if EV_USE_EVENTFD
1923 if (evfd >= 0)
1924 {
1925 uint64_t counter = 1;
1926 write (evfd, &counter, sizeof (uint64_t));
1927 }
1928 else
1929#endif
1930 {
1931#ifdef _WIN32
1932 WSABUF buf;
1933 DWORD sent;
1934 buf.buf = &buf;
1935 buf.len = 1;
1936 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
1937#else
1938 write (evpipe [1], &(evpipe [1]), 1);
1939#endif
1940 }
1941
1942 errno = old_errno;
1943 }
1944}
1945
1946/* called whenever the libev signal pipe */
1947/* got some events (signal, async) */
345static void 1948static void
346call_pending () 1949pipecb (EV_P_ ev_io *iow, int revents)
347{ 1950{
348 int i; 1951 int i;
349 1952
350 for (i = 0; i < pendingcnt; ++i) 1953 if (revents & EV_READ)
351 { 1954 {
352 ANPENDING *p = pendings + i; 1955#if EV_USE_EVENTFD
353 1956 if (evfd >= 0)
354 if (p->w)
355 { 1957 {
356 p->w->pending = 0; 1958 uint64_t counter;
357 p->w->cb (p->w, p->events); 1959 read (evfd, &counter, sizeof (uint64_t));
358 } 1960 }
1961 else
1962#endif
1963 {
1964 char dummy[4];
1965#ifdef _WIN32
1966 WSABUF buf;
1967 DWORD recvd;
1968 DWORD flags = 0;
1969 buf.buf = dummy;
1970 buf.len = sizeof (dummy);
1971 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
1972#else
1973 read (evpipe [0], &dummy, sizeof (dummy));
1974#endif
1975 }
1976 }
1977
1978 pipe_write_skipped = 0;
1979
1980 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1981
1982#if EV_SIGNAL_ENABLE
1983 if (sig_pending)
359 } 1984 {
1985 sig_pending = 0;
360 1986
361 pendingcnt = 0; 1987 ECB_MEMORY_FENCE;
1988
1989 for (i = EV_NSIG - 1; i--; )
1990 if (expect_false (signals [i].pending))
1991 ev_feed_signal_event (EV_A_ i + 1);
1992 }
1993#endif
1994
1995#if EV_ASYNC_ENABLE
1996 if (async_pending)
1997 {
1998 async_pending = 0;
1999
2000 ECB_MEMORY_FENCE;
2001
2002 for (i = asynccnt; i--; )
2003 if (asyncs [i]->sent)
2004 {
2005 asyncs [i]->sent = 0;
2006 ECB_MEMORY_FENCE_RELEASE;
2007 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
2008 }
2009 }
2010#endif
2011}
2012
2013/*****************************************************************************/
2014
2015void
2016ev_feed_signal (int signum) EV_THROW
2017{
2018#if EV_MULTIPLICITY
2019 EV_P = signals [signum - 1].loop;
2020
2021 if (!EV_A)
2022 return;
2023#endif
2024
2025 if (!ev_active (&pipe_w))
2026 return;
2027
2028 signals [signum - 1].pending = 1;
2029 evpipe_write (EV_A_ &sig_pending);
362} 2030}
363 2031
364static void 2032static void
365timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now) 2033ev_sighandler (int signum)
366{ 2034{
367 while (timercnt && timers [0]->at <= now) 2035#ifdef _WIN32
2036 signal (signum, ev_sighandler);
2037#endif
2038
2039 ev_feed_signal (signum);
2040}
2041
2042void noinline
2043ev_feed_signal_event (EV_P_ int signum) EV_THROW
2044{
2045 WL w;
2046
2047 if (expect_false (signum <= 0 || signum > EV_NSIG))
2048 return;
2049
2050 --signum;
2051
2052#if EV_MULTIPLICITY
2053 /* it is permissible to try to feed a signal to the wrong loop */
2054 /* or, likely more useful, feeding a signal nobody is waiting for */
2055
2056 if (expect_false (signals [signum].loop != EV_A))
2057 return;
2058#endif
2059
2060 signals [signum].pending = 0;
2061 ECB_MEMORY_FENCE_RELEASE;
2062
2063 for (w = signals [signum].head; w; w = w->next)
2064 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2065}
2066
2067#if EV_USE_SIGNALFD
2068static void
2069sigfdcb (EV_P_ ev_io *iow, int revents)
2070{
2071 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2072
2073 for (;;)
2074 {
2075 ssize_t res = read (sigfd, si, sizeof (si));
2076
2077 /* not ISO-C, as res might be -1, but works with SuS */
2078 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2079 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2080
2081 if (res < (ssize_t)sizeof (si))
2082 break;
2083 }
2084}
2085#endif
2086
2087#endif
2088
2089/*****************************************************************************/
2090
2091#if EV_CHILD_ENABLE
2092static WL childs [EV_PID_HASHSIZE];
2093
2094static ev_signal childev;
2095
2096#ifndef WIFCONTINUED
2097# define WIFCONTINUED(status) 0
2098#endif
2099
2100/* handle a single child status event */
2101inline_speed void
2102child_reap (EV_P_ int chain, int pid, int status)
2103{
2104 ev_child *w;
2105 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
2106
2107 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2108 {
2109 if ((w->pid == pid || !w->pid)
2110 && (!traced || (w->flags & 1)))
2111 {
2112 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
2113 w->rpid = pid;
2114 w->rstatus = status;
2115 ev_feed_event (EV_A_ (W)w, EV_CHILD);
2116 }
2117 }
2118}
2119
2120#ifndef WCONTINUED
2121# define WCONTINUED 0
2122#endif
2123
2124/* called on sigchld etc., calls waitpid */
2125static void
2126childcb (EV_P_ ev_signal *sw, int revents)
2127{
2128 int pid, status;
2129
2130 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
2131 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
2132 if (!WCONTINUED
2133 || errno != EINVAL
2134 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
2135 return;
2136
2137 /* make sure we are called again until all children have been reaped */
2138 /* we need to do it this way so that the callback gets called before we continue */
2139 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
2140
2141 child_reap (EV_A_ pid, pid, status);
2142 if ((EV_PID_HASHSIZE) > 1)
2143 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
2144}
2145
2146#endif
2147
2148/*****************************************************************************/
2149
2150#if EV_USE_IOCP
2151# include "ev_iocp.c"
2152#endif
2153#if EV_USE_PORT
2154# include "ev_port.c"
2155#endif
2156#if EV_USE_KQUEUE
2157# include "ev_kqueue.c"
2158#endif
2159#if EV_USE_EPOLL
2160# include "ev_epoll.c"
2161#endif
2162#if EV_USE_POLL
2163# include "ev_poll.c"
2164#endif
2165#if EV_USE_SELECT
2166# include "ev_select.c"
2167#endif
2168
2169int ecb_cold
2170ev_version_major (void) EV_THROW
2171{
2172 return EV_VERSION_MAJOR;
2173}
2174
2175int ecb_cold
2176ev_version_minor (void) EV_THROW
2177{
2178 return EV_VERSION_MINOR;
2179}
2180
2181/* return true if we are running with elevated privileges and should ignore env variables */
2182int inline_size ecb_cold
2183enable_secure (void)
2184{
2185#ifdef _WIN32
2186 return 0;
2187#else
2188 return getuid () != geteuid ()
2189 || getgid () != getegid ();
2190#endif
2191}
2192
2193unsigned int ecb_cold
2194ev_supported_backends (void) EV_THROW
2195{
2196 unsigned int flags = 0;
2197
2198 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2199 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
2200 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2201 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2202 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2203
2204 return flags;
2205}
2206
2207unsigned int ecb_cold
2208ev_recommended_backends (void) EV_THROW
2209{
2210 unsigned int flags = ev_supported_backends ();
2211
2212#ifndef __NetBSD__
2213 /* kqueue is borked on everything but netbsd apparently */
2214 /* it usually doesn't work correctly on anything but sockets and pipes */
2215 flags &= ~EVBACKEND_KQUEUE;
2216#endif
2217#ifdef __APPLE__
2218 /* only select works correctly on that "unix-certified" platform */
2219 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2220 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2221#endif
2222#ifdef __FreeBSD__
2223 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2224#endif
2225
2226 return flags;
2227}
2228
2229unsigned int ecb_cold
2230ev_embeddable_backends (void) EV_THROW
2231{
2232 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2233
2234 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2235 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2236 flags &= ~EVBACKEND_EPOLL;
2237
2238 return flags;
2239}
2240
2241unsigned int
2242ev_backend (EV_P) EV_THROW
2243{
2244 return backend;
2245}
2246
2247#if EV_FEATURE_API
2248unsigned int
2249ev_iteration (EV_P) EV_THROW
2250{
2251 return loop_count;
2252}
2253
2254unsigned int
2255ev_depth (EV_P) EV_THROW
2256{
2257 return loop_depth;
2258}
2259
2260void
2261ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2262{
2263 io_blocktime = interval;
2264}
2265
2266void
2267ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2268{
2269 timeout_blocktime = interval;
2270}
2271
2272void
2273ev_set_userdata (EV_P_ void *data) EV_THROW
2274{
2275 userdata = data;
2276}
2277
2278void *
2279ev_userdata (EV_P) EV_THROW
2280{
2281 return userdata;
2282}
2283
2284void
2285ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
2286{
2287 invoke_cb = invoke_pending_cb;
2288}
2289
2290void
2291ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2292{
2293 release_cb = release;
2294 acquire_cb = acquire;
2295}
2296#endif
2297
2298/* initialise a loop structure, must be zero-initialised */
2299static void noinline ecb_cold
2300loop_init (EV_P_ unsigned int flags) EV_THROW
2301{
2302 if (!backend)
2303 {
2304 origflags = flags;
2305
2306#if EV_USE_REALTIME
2307 if (!have_realtime)
2308 {
2309 struct timespec ts;
2310
2311 if (!clock_gettime (CLOCK_REALTIME, &ts))
2312 have_realtime = 1;
2313 }
2314#endif
2315
2316#if EV_USE_MONOTONIC
2317 if (!have_monotonic)
2318 {
2319 struct timespec ts;
2320
2321 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
2322 have_monotonic = 1;
2323 }
2324#endif
2325
2326 /* pid check not overridable via env */
2327#ifndef _WIN32
2328 if (flags & EVFLAG_FORKCHECK)
2329 curpid = getpid ();
2330#endif
2331
2332 if (!(flags & EVFLAG_NOENV)
2333 && !enable_secure ()
2334 && getenv ("LIBEV_FLAGS"))
2335 flags = atoi (getenv ("LIBEV_FLAGS"));
2336
2337 ev_rt_now = ev_time ();
2338 mn_now = get_clock ();
2339 now_floor = mn_now;
2340 rtmn_diff = ev_rt_now - mn_now;
2341#if EV_FEATURE_API
2342 invoke_cb = ev_invoke_pending;
2343#endif
2344
2345 io_blocktime = 0.;
2346 timeout_blocktime = 0.;
2347 backend = 0;
2348 backend_fd = -1;
2349 sig_pending = 0;
2350#if EV_ASYNC_ENABLE
2351 async_pending = 0;
2352#endif
2353 pipe_write_skipped = 0;
2354 pipe_write_wanted = 0;
2355#if EV_USE_INOTIFY
2356 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2357#endif
2358#if EV_USE_SIGNALFD
2359 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2360#endif
2361
2362 if (!(flags & EVBACKEND_MASK))
2363 flags |= ev_recommended_backends ();
2364
2365#if EV_USE_IOCP
2366 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2367#endif
2368#if EV_USE_PORT
2369 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
2370#endif
2371#if EV_USE_KQUEUE
2372 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
2373#endif
2374#if EV_USE_EPOLL
2375 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
2376#endif
2377#if EV_USE_POLL
2378 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
2379#endif
2380#if EV_USE_SELECT
2381 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
2382#endif
2383
2384 ev_prepare_init (&pending_w, pendingcb);
2385
2386#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2387 ev_init (&pipe_w, pipecb);
2388 ev_set_priority (&pipe_w, EV_MAXPRI);
2389#endif
2390 }
2391}
2392
2393/* free up a loop structure */
2394void ecb_cold
2395ev_loop_destroy (EV_P)
2396{
2397 int i;
2398
2399#if EV_MULTIPLICITY
2400 /* mimic free (0) */
2401 if (!EV_A)
2402 return;
2403#endif
2404
2405#if EV_CLEANUP_ENABLE
2406 /* queue cleanup watchers (and execute them) */
2407 if (expect_false (cleanupcnt))
2408 {
2409 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2410 EV_INVOKE_PENDING;
2411 }
2412#endif
2413
2414#if EV_CHILD_ENABLE
2415 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2416 {
2417 ev_ref (EV_A); /* child watcher */
2418 ev_signal_stop (EV_A_ &childev);
2419 }
2420#endif
2421
2422 if (ev_is_active (&pipe_w))
2423 {
2424 /*ev_ref (EV_A);*/
2425 /*ev_io_stop (EV_A_ &pipe_w);*/
2426
2427#if EV_USE_EVENTFD
2428 if (evfd >= 0)
2429 close (evfd);
2430#endif
2431
2432 if (evpipe [0] >= 0)
2433 {
2434 EV_WIN32_CLOSE_FD (evpipe [0]);
2435 EV_WIN32_CLOSE_FD (evpipe [1]);
2436 }
2437 }
2438
2439#if EV_USE_SIGNALFD
2440 if (ev_is_active (&sigfd_w))
2441 close (sigfd);
2442#endif
2443
2444#if EV_USE_INOTIFY
2445 if (fs_fd >= 0)
2446 close (fs_fd);
2447#endif
2448
2449 if (backend_fd >= 0)
2450 close (backend_fd);
2451
2452#if EV_USE_IOCP
2453 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2454#endif
2455#if EV_USE_PORT
2456 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
2457#endif
2458#if EV_USE_KQUEUE
2459 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
2460#endif
2461#if EV_USE_EPOLL
2462 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
2463#endif
2464#if EV_USE_POLL
2465 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
2466#endif
2467#if EV_USE_SELECT
2468 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
2469#endif
2470
2471 for (i = NUMPRI; i--; )
2472 {
2473 array_free (pending, [i]);
2474#if EV_IDLE_ENABLE
2475 array_free (idle, [i]);
2476#endif
2477 }
2478
2479 ev_free (anfds); anfds = 0; anfdmax = 0;
2480
2481 /* have to use the microsoft-never-gets-it-right macro */
2482 array_free (rfeed, EMPTY);
2483 array_free (fdchange, EMPTY);
2484 array_free (timer, EMPTY);
2485#if EV_PERIODIC_ENABLE
2486 array_free (periodic, EMPTY);
2487#endif
2488#if EV_FORK_ENABLE
2489 array_free (fork, EMPTY);
2490#endif
2491#if EV_CLEANUP_ENABLE
2492 array_free (cleanup, EMPTY);
2493#endif
2494 array_free (prepare, EMPTY);
2495 array_free (check, EMPTY);
2496#if EV_ASYNC_ENABLE
2497 array_free (async, EMPTY);
2498#endif
2499
2500 backend = 0;
2501
2502#if EV_MULTIPLICITY
2503 if (ev_is_default_loop (EV_A))
2504#endif
2505 ev_default_loop_ptr = 0;
2506#if EV_MULTIPLICITY
2507 else
2508 ev_free (EV_A);
2509#endif
2510}
2511
2512#if EV_USE_INOTIFY
2513inline_size void infy_fork (EV_P);
2514#endif
2515
2516inline_size void
2517loop_fork (EV_P)
2518{
2519#if EV_USE_PORT
2520 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2521#endif
2522#if EV_USE_KQUEUE
2523 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
2524#endif
2525#if EV_USE_EPOLL
2526 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
2527#endif
2528#if EV_USE_INOTIFY
2529 infy_fork (EV_A);
2530#endif
2531
2532 if (ev_is_active (&pipe_w))
2533 {
2534 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2535
2536 ev_ref (EV_A);
2537 ev_io_stop (EV_A_ &pipe_w);
2538
2539#if EV_USE_EVENTFD
2540 if (evfd >= 0)
2541 close (evfd);
2542#endif
2543
2544 if (evpipe [0] >= 0)
2545 {
2546 EV_WIN32_CLOSE_FD (evpipe [0]);
2547 EV_WIN32_CLOSE_FD (evpipe [1]);
2548 }
2549
2550#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2551 evpipe_init (EV_A);
2552 /* now iterate over everything, in case we missed something */
2553 pipecb (EV_A_ &pipe_w, EV_READ);
2554#endif
2555 }
2556
2557 postfork = 0;
2558}
2559
2560#if EV_MULTIPLICITY
2561
2562struct ev_loop * ecb_cold
2563ev_loop_new (unsigned int flags) EV_THROW
2564{
2565 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2566
2567 memset (EV_A, 0, sizeof (struct ev_loop));
2568 loop_init (EV_A_ flags);
2569
2570 if (ev_backend (EV_A))
2571 return EV_A;
2572
2573 ev_free (EV_A);
2574 return 0;
2575}
2576
2577#endif /* multiplicity */
2578
2579#if EV_VERIFY
2580static void noinline ecb_cold
2581verify_watcher (EV_P_ W w)
2582{
2583 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2584
2585 if (w->pending)
2586 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2587}
2588
2589static void noinline ecb_cold
2590verify_heap (EV_P_ ANHE *heap, int N)
2591{
2592 int i;
2593
2594 for (i = HEAP0; i < N + HEAP0; ++i)
2595 {
2596 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2597 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2598 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2599
2600 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2601 }
2602}
2603
2604static void noinline ecb_cold
2605array_verify (EV_P_ W *ws, int cnt)
2606{
2607 while (cnt--)
2608 {
2609 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2610 verify_watcher (EV_A_ ws [cnt]);
2611 }
2612}
2613#endif
2614
2615#if EV_FEATURE_API
2616void ecb_cold
2617ev_verify (EV_P) EV_THROW
2618{
2619#if EV_VERIFY
2620 int i;
2621 WL w, w2;
2622
2623 assert (activecnt >= -1);
2624
2625 assert (fdchangemax >= fdchangecnt);
2626 for (i = 0; i < fdchangecnt; ++i)
2627 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2628
2629 assert (anfdmax >= 0);
2630 for (i = 0; i < anfdmax; ++i)
2631 {
2632 int j = 0;
2633
2634 for (w = w2 = anfds [i].head; w; w = w->next)
2635 {
2636 verify_watcher (EV_A_ (W)w);
2637
2638 if (j++ & 1)
2639 {
2640 assert (("libev: io watcher list contains a loop", w != w2));
2641 w2 = w2->next;
2642 }
2643
2644 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2645 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2646 }
2647 }
2648
2649 assert (timermax >= timercnt);
2650 verify_heap (EV_A_ timers, timercnt);
2651
2652#if EV_PERIODIC_ENABLE
2653 assert (periodicmax >= periodiccnt);
2654 verify_heap (EV_A_ periodics, periodiccnt);
2655#endif
2656
2657 for (i = NUMPRI; i--; )
2658 {
2659 assert (pendingmax [i] >= pendingcnt [i]);
2660#if EV_IDLE_ENABLE
2661 assert (idleall >= 0);
2662 assert (idlemax [i] >= idlecnt [i]);
2663 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2664#endif
2665 }
2666
2667#if EV_FORK_ENABLE
2668 assert (forkmax >= forkcnt);
2669 array_verify (EV_A_ (W *)forks, forkcnt);
2670#endif
2671
2672#if EV_CLEANUP_ENABLE
2673 assert (cleanupmax >= cleanupcnt);
2674 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2675#endif
2676
2677#if EV_ASYNC_ENABLE
2678 assert (asyncmax >= asynccnt);
2679 array_verify (EV_A_ (W *)asyncs, asynccnt);
2680#endif
2681
2682#if EV_PREPARE_ENABLE
2683 assert (preparemax >= preparecnt);
2684 array_verify (EV_A_ (W *)prepares, preparecnt);
2685#endif
2686
2687#if EV_CHECK_ENABLE
2688 assert (checkmax >= checkcnt);
2689 array_verify (EV_A_ (W *)checks, checkcnt);
2690#endif
2691
2692# if 0
2693#if EV_CHILD_ENABLE
2694 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2695 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2696#endif
2697# endif
2698#endif
2699}
2700#endif
2701
2702#if EV_MULTIPLICITY
2703struct ev_loop * ecb_cold
2704#else
2705int
2706#endif
2707ev_default_loop (unsigned int flags) EV_THROW
2708{
2709 if (!ev_default_loop_ptr)
2710 {
2711#if EV_MULTIPLICITY
2712 EV_P = ev_default_loop_ptr = &default_loop_struct;
2713#else
2714 ev_default_loop_ptr = 1;
2715#endif
2716
2717 loop_init (EV_A_ flags);
2718
2719 if (ev_backend (EV_A))
2720 {
2721#if EV_CHILD_ENABLE
2722 ev_signal_init (&childev, childcb, SIGCHLD);
2723 ev_set_priority (&childev, EV_MAXPRI);
2724 ev_signal_start (EV_A_ &childev);
2725 ev_unref (EV_A); /* child watcher should not keep loop alive */
2726#endif
2727 }
2728 else
2729 ev_default_loop_ptr = 0;
2730 }
2731
2732 return ev_default_loop_ptr;
2733}
2734
2735void
2736ev_loop_fork (EV_P) EV_THROW
2737{
2738 postfork = 1;
2739}
2740
2741/*****************************************************************************/
2742
2743void
2744ev_invoke (EV_P_ void *w, int revents)
2745{
2746 EV_CB_INVOKE ((W)w, revents);
2747}
2748
2749unsigned int
2750ev_pending_count (EV_P) EV_THROW
2751{
2752 int pri;
2753 unsigned int count = 0;
2754
2755 for (pri = NUMPRI; pri--; )
2756 count += pendingcnt [pri];
2757
2758 return count;
2759}
2760
2761void noinline
2762ev_invoke_pending (EV_P)
2763{
2764 for (pendingpri = NUMPRI; pendingpri--; ) /* pendingpri is modified during the loop */
2765 while (pendingcnt [pendingpri])
368 { 2766 {
369 struct ev_timer *w = timers [0]; 2767 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
370 2768
2769 p->w->pending = 0;
2770 EV_CB_INVOKE (p->w, p->events);
2771 EV_FREQUENT_CHECK;
2772 }
2773}
2774
2775#if EV_IDLE_ENABLE
2776/* make idle watchers pending. this handles the "call-idle */
2777/* only when higher priorities are idle" logic */
2778inline_size void
2779idle_reify (EV_P)
2780{
2781 if (expect_false (idleall))
2782 {
2783 int pri;
2784
2785 for (pri = NUMPRI; pri--; )
2786 {
2787 if (pendingcnt [pri])
2788 break;
2789
2790 if (idlecnt [pri])
2791 {
2792 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2793 break;
2794 }
2795 }
2796 }
2797}
2798#endif
2799
2800/* make timers pending */
2801inline_size void
2802timers_reify (EV_P)
2803{
2804 EV_FREQUENT_CHECK;
2805
2806 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2807 {
2808 do
2809 {
2810 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2811
2812 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2813
371 /* first reschedule or stop timer */ 2814 /* first reschedule or stop timer */
2815 if (w->repeat)
2816 {
2817 ev_at (w) += w->repeat;
2818 if (ev_at (w) < mn_now)
2819 ev_at (w) = mn_now;
2820
2821 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2822
2823 ANHE_at_cache (timers [HEAP0]);
2824 downheap (timers, timercnt, HEAP0);
2825 }
2826 else
2827 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2828
2829 EV_FREQUENT_CHECK;
2830 feed_reverse (EV_A_ (W)w);
2831 }
2832 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2833
2834 feed_reverse_done (EV_A_ EV_TIMER);
2835 }
2836}
2837
2838#if EV_PERIODIC_ENABLE
2839
2840static void noinline
2841periodic_recalc (EV_P_ ev_periodic *w)
2842{
2843 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2844 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2845
2846 /* the above almost always errs on the low side */
2847 while (at <= ev_rt_now)
2848 {
2849 ev_tstamp nat = at + w->interval;
2850
2851 /* when resolution fails us, we use ev_rt_now */
2852 if (expect_false (nat == at))
2853 {
2854 at = ev_rt_now;
2855 break;
2856 }
2857
2858 at = nat;
2859 }
2860
2861 ev_at (w) = at;
2862}
2863
2864/* make periodics pending */
2865inline_size void
2866periodics_reify (EV_P)
2867{
2868 EV_FREQUENT_CHECK;
2869
2870 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2871 {
2872 do
2873 {
2874 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2875
2876 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2877
2878 /* first reschedule or stop timer */
2879 if (w->reschedule_cb)
2880 {
2881 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2882
2883 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2884
2885 ANHE_at_cache (periodics [HEAP0]);
2886 downheap (periodics, periodiccnt, HEAP0);
2887 }
2888 else if (w->interval)
2889 {
2890 periodic_recalc (EV_A_ w);
2891 ANHE_at_cache (periodics [HEAP0]);
2892 downheap (periodics, periodiccnt, HEAP0);
2893 }
2894 else
2895 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2896
2897 EV_FREQUENT_CHECK;
2898 feed_reverse (EV_A_ (W)w);
2899 }
2900 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2901
2902 feed_reverse_done (EV_A_ EV_PERIODIC);
2903 }
2904}
2905
2906/* simply recalculate all periodics */
2907/* TODO: maybe ensure that at least one event happens when jumping forward? */
2908static void noinline ecb_cold
2909periodics_reschedule (EV_P)
2910{
2911 int i;
2912
2913 /* adjust periodics after time jump */
2914 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2915 {
2916 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2917
2918 if (w->reschedule_cb)
2919 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2920 else if (w->interval)
2921 periodic_recalc (EV_A_ w);
2922
2923 ANHE_at_cache (periodics [i]);
2924 }
2925
2926 reheap (periodics, periodiccnt);
2927}
2928#endif
2929
2930/* adjust all timers by a given offset */
2931static void noinline ecb_cold
2932timers_reschedule (EV_P_ ev_tstamp adjust)
2933{
2934 int i;
2935
2936 for (i = 0; i < timercnt; ++i)
2937 {
2938 ANHE *he = timers + i + HEAP0;
2939 ANHE_w (*he)->at += adjust;
2940 ANHE_at_cache (*he);
2941 }
2942}
2943
2944/* fetch new monotonic and realtime times from the kernel */
2945/* also detect if there was a timejump, and act accordingly */
2946inline_speed void
2947time_update (EV_P_ ev_tstamp max_block)
2948{
2949#if EV_USE_MONOTONIC
2950 if (expect_true (have_monotonic))
2951 {
2952 int i;
2953 ev_tstamp odiff = rtmn_diff;
2954
2955 mn_now = get_clock ();
2956
2957 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2958 /* interpolate in the meantime */
2959 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2960 {
2961 ev_rt_now = rtmn_diff + mn_now;
2962 return;
2963 }
2964
2965 now_floor = mn_now;
2966 ev_rt_now = ev_time ();
2967
2968 /* loop a few times, before making important decisions.
2969 * on the choice of "4": one iteration isn't enough,
2970 * in case we get preempted during the calls to
2971 * ev_time and get_clock. a second call is almost guaranteed
2972 * to succeed in that case, though. and looping a few more times
2973 * doesn't hurt either as we only do this on time-jumps or
2974 * in the unlikely event of having been preempted here.
2975 */
2976 for (i = 4; --i; )
2977 {
2978 ev_tstamp diff;
2979 rtmn_diff = ev_rt_now - mn_now;
2980
2981 diff = odiff - rtmn_diff;
2982
2983 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2984 return; /* all is well */
2985
2986 ev_rt_now = ev_time ();
2987 mn_now = get_clock ();
2988 now_floor = mn_now;
2989 }
2990
2991 /* no timer adjustment, as the monotonic clock doesn't jump */
2992 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2993# if EV_PERIODIC_ENABLE
2994 periodics_reschedule (EV_A);
2995# endif
2996 }
2997 else
2998#endif
2999 {
3000 ev_rt_now = ev_time ();
3001
3002 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
3003 {
3004 /* adjust timers. this is easy, as the offset is the same for all of them */
3005 timers_reschedule (EV_A_ ev_rt_now - mn_now);
3006#if EV_PERIODIC_ENABLE
3007 periodics_reschedule (EV_A);
3008#endif
3009 }
3010
3011 mn_now = ev_rt_now;
3012 }
3013}
3014
3015int
3016ev_run (EV_P_ int flags)
3017{
3018#if EV_FEATURE_API
3019 ++loop_depth;
3020#endif
3021
3022 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3023
3024 loop_done = EVBREAK_CANCEL;
3025
3026 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
3027
3028 do
3029 {
3030#if EV_VERIFY >= 2
3031 ev_verify (EV_A);
3032#endif
3033
3034#ifndef _WIN32
3035 if (expect_false (curpid)) /* penalise the forking check even more */
3036 if (expect_false (getpid () != curpid))
3037 {
3038 curpid = getpid ();
3039 postfork = 1;
3040 }
3041#endif
3042
3043#if EV_FORK_ENABLE
3044 /* we might have forked, so queue fork handlers */
3045 if (expect_false (postfork))
3046 if (forkcnt)
3047 {
3048 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
3049 EV_INVOKE_PENDING;
3050 }
3051#endif
3052
3053#if EV_PREPARE_ENABLE
3054 /* queue prepare watchers (and execute them) */
3055 if (expect_false (preparecnt))
3056 {
3057 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
3058 EV_INVOKE_PENDING;
3059 }
3060#endif
3061
3062 if (expect_false (loop_done))
3063 break;
3064
3065 /* we might have forked, so reify kernel state if necessary */
3066 if (expect_false (postfork))
3067 loop_fork (EV_A);
3068
3069 /* update fd-related kernel structures */
3070 fd_reify (EV_A);
3071
3072 /* calculate blocking time */
3073 {
3074 ev_tstamp waittime = 0.;
3075 ev_tstamp sleeptime = 0.;
3076
3077 /* remember old timestamp for io_blocktime calculation */
3078 ev_tstamp prev_mn_now = mn_now;
3079
3080 /* update time to cancel out callback processing overhead */
3081 time_update (EV_A_ 1e100);
3082
3083 /* from now on, we want a pipe-wake-up */
3084 pipe_write_wanted = 1;
3085
3086 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3087
3088 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
3089 {
3090 waittime = MAX_BLOCKTIME;
3091
3092 if (timercnt)
3093 {
3094 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
3095 if (waittime > to) waittime = to;
3096 }
3097
3098#if EV_PERIODIC_ENABLE
3099 if (periodiccnt)
3100 {
3101 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
3102 if (waittime > to) waittime = to;
3103 }
3104#endif
3105
3106 /* don't let timeouts decrease the waittime below timeout_blocktime */
3107 if (expect_false (waittime < timeout_blocktime))
3108 waittime = timeout_blocktime;
3109
3110 /* at this point, we NEED to wait, so we have to ensure */
3111 /* to pass a minimum nonzero value to the backend */
3112 if (expect_false (waittime < backend_mintime))
3113 waittime = backend_mintime;
3114
3115 /* extra check because io_blocktime is commonly 0 */
3116 if (expect_false (io_blocktime))
3117 {
3118 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3119
3120 if (sleeptime > waittime - backend_mintime)
3121 sleeptime = waittime - backend_mintime;
3122
3123 if (expect_true (sleeptime > 0.))
3124 {
3125 ev_sleep (sleeptime);
3126 waittime -= sleeptime;
3127 }
3128 }
3129 }
3130
3131#if EV_FEATURE_API
3132 ++loop_count;
3133#endif
3134 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
3135 backend_poll (EV_A_ waittime);
3136 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3137
3138 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3139
3140 if (pipe_write_skipped)
3141 {
3142 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3143 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3144 }
3145
3146
3147 /* update ev_rt_now, do magic */
3148 time_update (EV_A_ waittime + sleeptime);
3149 }
3150
3151 /* queue pending timers and reschedule them */
3152 timers_reify (EV_A); /* relative timers called last */
3153#if EV_PERIODIC_ENABLE
3154 periodics_reify (EV_A); /* absolute timers called first */
3155#endif
3156
3157#if EV_IDLE_ENABLE
3158 /* queue idle watchers unless other events are pending */
3159 idle_reify (EV_A);
3160#endif
3161
3162#if EV_CHECK_ENABLE
3163 /* queue check watchers, to be executed first */
3164 if (expect_false (checkcnt))
3165 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3166#endif
3167
3168 EV_INVOKE_PENDING;
3169 }
3170 while (expect_true (
3171 activecnt
3172 && !loop_done
3173 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3174 ));
3175
3176 if (loop_done == EVBREAK_ONE)
3177 loop_done = EVBREAK_CANCEL;
3178
3179#if EV_FEATURE_API
3180 --loop_depth;
3181#endif
3182
3183 return activecnt;
3184}
3185
3186void
3187ev_break (EV_P_ int how) EV_THROW
3188{
3189 loop_done = how;
3190}
3191
3192void
3193ev_ref (EV_P) EV_THROW
3194{
3195 ++activecnt;
3196}
3197
3198void
3199ev_unref (EV_P) EV_THROW
3200{
3201 --activecnt;
3202}
3203
3204void
3205ev_now_update (EV_P) EV_THROW
3206{
3207 time_update (EV_A_ 1e100);
3208}
3209
3210void
3211ev_suspend (EV_P) EV_THROW
3212{
3213 ev_now_update (EV_A);
3214}
3215
3216void
3217ev_resume (EV_P) EV_THROW
3218{
3219 ev_tstamp mn_prev = mn_now;
3220
3221 ev_now_update (EV_A);
3222 timers_reschedule (EV_A_ mn_now - mn_prev);
3223#if EV_PERIODIC_ENABLE
3224 /* TODO: really do this? */
3225 periodics_reschedule (EV_A);
3226#endif
3227}
3228
3229/*****************************************************************************/
3230/* singly-linked list management, used when the expected list length is short */
3231
3232inline_size void
3233wlist_add (WL *head, WL elem)
3234{
3235 elem->next = *head;
3236 *head = elem;
3237}
3238
3239inline_size void
3240wlist_del (WL *head, WL elem)
3241{
3242 while (*head)
3243 {
3244 if (expect_true (*head == elem))
3245 {
3246 *head = elem->next;
3247 break;
3248 }
3249
3250 head = &(*head)->next;
3251 }
3252}
3253
3254/* internal, faster, version of ev_clear_pending */
3255inline_speed void
3256clear_pending (EV_P_ W w)
3257{
3258 if (w->pending)
3259 {
3260 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
3261 w->pending = 0;
3262 }
3263}
3264
3265int
3266ev_clear_pending (EV_P_ void *w) EV_THROW
3267{
3268 W w_ = (W)w;
3269 int pending = w_->pending;
3270
3271 if (expect_true (pending))
3272 {
3273 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3274 p->w = (W)&pending_w;
3275 w_->pending = 0;
3276 return p->events;
3277 }
3278 else
3279 return 0;
3280}
3281
3282inline_size void
3283pri_adjust (EV_P_ W w)
3284{
3285 int pri = ev_priority (w);
3286 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3287 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3288 ev_set_priority (w, pri);
3289}
3290
3291inline_speed void
3292ev_start (EV_P_ W w, int active)
3293{
3294 pri_adjust (EV_A_ w);
3295 w->active = active;
3296 ev_ref (EV_A);
3297}
3298
3299inline_size void
3300ev_stop (EV_P_ W w)
3301{
3302 ev_unref (EV_A);
3303 w->active = 0;
3304}
3305
3306/*****************************************************************************/
3307
3308void noinline
3309ev_io_start (EV_P_ ev_io *w) EV_THROW
3310{
3311 int fd = w->fd;
3312
3313 if (expect_false (ev_is_active (w)))
3314 return;
3315
3316 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3317 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3318
3319 EV_FREQUENT_CHECK;
3320
3321 ev_start (EV_A_ (W)w, 1);
3322 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
3323 wlist_add (&anfds[fd].head, (WL)w);
3324
3325 /* common bug, apparently */
3326 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3327
3328 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3329 w->events &= ~EV__IOFDSET;
3330
3331 EV_FREQUENT_CHECK;
3332}
3333
3334void noinline
3335ev_io_stop (EV_P_ ev_io *w) EV_THROW
3336{
3337 clear_pending (EV_A_ (W)w);
3338 if (expect_false (!ev_is_active (w)))
3339 return;
3340
3341 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3342
3343 EV_FREQUENT_CHECK;
3344
3345 wlist_del (&anfds[w->fd].head, (WL)w);
3346 ev_stop (EV_A_ (W)w);
3347
3348 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3349
3350 EV_FREQUENT_CHECK;
3351}
3352
3353void noinline
3354ev_timer_start (EV_P_ ev_timer *w) EV_THROW
3355{
3356 if (expect_false (ev_is_active (w)))
3357 return;
3358
3359 ev_at (w) += mn_now;
3360
3361 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
3362
3363 EV_FREQUENT_CHECK;
3364
3365 ++timercnt;
3366 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
3367 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
3368 ANHE_w (timers [ev_active (w)]) = (WT)w;
3369 ANHE_at_cache (timers [ev_active (w)]);
3370 upheap (timers, ev_active (w));
3371
3372 EV_FREQUENT_CHECK;
3373
3374 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
3375}
3376
3377void noinline
3378ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
3379{
3380 clear_pending (EV_A_ (W)w);
3381 if (expect_false (!ev_is_active (w)))
3382 return;
3383
3384 EV_FREQUENT_CHECK;
3385
3386 {
3387 int active = ev_active (w);
3388
3389 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3390
3391 --timercnt;
3392
3393 if (expect_true (active < timercnt + HEAP0))
3394 {
3395 timers [active] = timers [timercnt + HEAP0];
3396 adjustheap (timers, timercnt, active);
3397 }
3398 }
3399
3400 ev_at (w) -= mn_now;
3401
3402 ev_stop (EV_A_ (W)w);
3403
3404 EV_FREQUENT_CHECK;
3405}
3406
3407void noinline
3408ev_timer_again (EV_P_ ev_timer *w) EV_THROW
3409{
3410 EV_FREQUENT_CHECK;
3411
3412 clear_pending (EV_A_ (W)w);
3413
3414 if (ev_is_active (w))
3415 {
372 if (w->repeat) 3416 if (w->repeat)
373 { 3417 {
374 if (w->is_abs)
375 w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
376 else
377 w->at = now + w->repeat; 3418 ev_at (w) = mn_now + w->repeat;
378 3419 ANHE_at_cache (timers [ev_active (w)]);
379 assert (w->at > now);
380
381 downheap (timers, timercnt, 0); 3420 adjustheap (timers, timercnt, ev_active (w));
382 } 3421 }
383 else 3422 else
3423 ev_timer_stop (EV_A_ w);
3424 }
3425 else if (w->repeat)
3426 {
3427 ev_at (w) = w->repeat;
3428 ev_timer_start (EV_A_ w);
3429 }
3430
3431 EV_FREQUENT_CHECK;
3432}
3433
3434ev_tstamp
3435ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3436{
3437 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3438}
3439
3440#if EV_PERIODIC_ENABLE
3441void noinline
3442ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
3443{
3444 if (expect_false (ev_is_active (w)))
3445 return;
3446
3447 if (w->reschedule_cb)
3448 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3449 else if (w->interval)
3450 {
3451 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
3452 periodic_recalc (EV_A_ w);
3453 }
3454 else
3455 ev_at (w) = w->offset;
3456
3457 EV_FREQUENT_CHECK;
3458
3459 ++periodiccnt;
3460 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
3461 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
3462 ANHE_w (periodics [ev_active (w)]) = (WT)w;
3463 ANHE_at_cache (periodics [ev_active (w)]);
3464 upheap (periodics, ev_active (w));
3465
3466 EV_FREQUENT_CHECK;
3467
3468 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
3469}
3470
3471void noinline
3472ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
3473{
3474 clear_pending (EV_A_ (W)w);
3475 if (expect_false (!ev_is_active (w)))
3476 return;
3477
3478 EV_FREQUENT_CHECK;
3479
3480 {
3481 int active = ev_active (w);
3482
3483 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3484
3485 --periodiccnt;
3486
3487 if (expect_true (active < periodiccnt + HEAP0))
3488 {
3489 periodics [active] = periodics [periodiccnt + HEAP0];
3490 adjustheap (periodics, periodiccnt, active);
3491 }
3492 }
3493
3494 ev_stop (EV_A_ (W)w);
3495
3496 EV_FREQUENT_CHECK;
3497}
3498
3499void noinline
3500ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
3501{
3502 /* TODO: use adjustheap and recalculation */
3503 ev_periodic_stop (EV_A_ w);
3504 ev_periodic_start (EV_A_ w);
3505}
3506#endif
3507
3508#ifndef SA_RESTART
3509# define SA_RESTART 0
3510#endif
3511
3512#if EV_SIGNAL_ENABLE
3513
3514void noinline
3515ev_signal_start (EV_P_ ev_signal *w) EV_THROW
3516{
3517 if (expect_false (ev_is_active (w)))
3518 return;
3519
3520 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3521
3522#if EV_MULTIPLICITY
3523 assert (("libev: a signal must not be attached to two different loops",
3524 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3525
3526 signals [w->signum - 1].loop = EV_A;
3527#endif
3528
3529 EV_FREQUENT_CHECK;
3530
3531#if EV_USE_SIGNALFD
3532 if (sigfd == -2)
3533 {
3534 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3535 if (sigfd < 0 && errno == EINVAL)
3536 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3537
3538 if (sigfd >= 0)
384 { 3539 {
385 evtimer_stop (w); /* nonrepeating: stop timer */ 3540 fd_intern (sigfd); /* doing it twice will not hurt */
386 --timercnt; /* maybe pass by reference instead? */ 3541
3542 sigemptyset (&sigfd_set);
3543
3544 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3545 ev_set_priority (&sigfd_w, EV_MAXPRI);
3546 ev_io_start (EV_A_ &sigfd_w);
3547 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
387 } 3548 }
3549 }
388 3550
389 event ((struct ev_watcher *)w, EV_TIMEOUT); 3551 if (sigfd >= 0)
3552 {
3553 /* TODO: check .head */
3554 sigaddset (&sigfd_set, w->signum);
3555 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3556
3557 signalfd (sigfd, &sigfd_set, 0);
3558 }
3559#endif
3560
3561 ev_start (EV_A_ (W)w, 1);
3562 wlist_add (&signals [w->signum - 1].head, (WL)w);
3563
3564 if (!((WL)w)->next)
3565# if EV_USE_SIGNALFD
3566 if (sigfd < 0) /*TODO*/
3567# endif
3568 {
3569# ifdef _WIN32
3570 evpipe_init (EV_A);
3571
3572 signal (w->signum, ev_sighandler);
3573# else
3574 struct sigaction sa;
3575
3576 evpipe_init (EV_A);
3577
3578 sa.sa_handler = ev_sighandler;
3579 sigfillset (&sa.sa_mask);
3580 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3581 sigaction (w->signum, &sa, 0);
3582
3583 if (origflags & EVFLAG_NOSIGMASK)
3584 {
3585 sigemptyset (&sa.sa_mask);
3586 sigaddset (&sa.sa_mask, w->signum);
3587 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3588 }
3589#endif
3590 }
3591
3592 EV_FREQUENT_CHECK;
3593}
3594
3595void noinline
3596ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
3597{
3598 clear_pending (EV_A_ (W)w);
3599 if (expect_false (!ev_is_active (w)))
3600 return;
3601
3602 EV_FREQUENT_CHECK;
3603
3604 wlist_del (&signals [w->signum - 1].head, (WL)w);
3605 ev_stop (EV_A_ (W)w);
3606
3607 if (!signals [w->signum - 1].head)
3608 {
3609#if EV_MULTIPLICITY
3610 signals [w->signum - 1].loop = 0; /* unattach from signal */
3611#endif
3612#if EV_USE_SIGNALFD
3613 if (sigfd >= 0)
3614 {
3615 sigset_t ss;
3616
3617 sigemptyset (&ss);
3618 sigaddset (&ss, w->signum);
3619 sigdelset (&sigfd_set, w->signum);
3620
3621 signalfd (sigfd, &sigfd_set, 0);
3622 sigprocmask (SIG_UNBLOCK, &ss, 0);
3623 }
3624 else
3625#endif
3626 signal (w->signum, SIG_DFL);
3627 }
3628
3629 EV_FREQUENT_CHECK;
3630}
3631
3632#endif
3633
3634#if EV_CHILD_ENABLE
3635
3636void
3637ev_child_start (EV_P_ ev_child *w) EV_THROW
3638{
3639#if EV_MULTIPLICITY
3640 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3641#endif
3642 if (expect_false (ev_is_active (w)))
3643 return;
3644
3645 EV_FREQUENT_CHECK;
3646
3647 ev_start (EV_A_ (W)w, 1);
3648 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3649
3650 EV_FREQUENT_CHECK;
3651}
3652
3653void
3654ev_child_stop (EV_P_ ev_child *w) EV_THROW
3655{
3656 clear_pending (EV_A_ (W)w);
3657 if (expect_false (!ev_is_active (w)))
3658 return;
3659
3660 EV_FREQUENT_CHECK;
3661
3662 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3663 ev_stop (EV_A_ (W)w);
3664
3665 EV_FREQUENT_CHECK;
3666}
3667
3668#endif
3669
3670#if EV_STAT_ENABLE
3671
3672# ifdef _WIN32
3673# undef lstat
3674# define lstat(a,b) _stati64 (a,b)
3675# endif
3676
3677#define DEF_STAT_INTERVAL 5.0074891
3678#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3679#define MIN_STAT_INTERVAL 0.1074891
3680
3681static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3682
3683#if EV_USE_INOTIFY
3684
3685/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3686# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3687
3688static void noinline
3689infy_add (EV_P_ ev_stat *w)
3690{
3691 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);
3692
3693 if (w->wd >= 0)
3694 {
3695 struct statfs sfs;
3696
3697 /* now local changes will be tracked by inotify, but remote changes won't */
3698 /* unless the filesystem is known to be local, we therefore still poll */
3699 /* also do poll on <2.6.25, but with normal frequency */
3700
3701 if (!fs_2625)
3702 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3703 else if (!statfs (w->path, &sfs)
3704 && (sfs.f_type == 0x1373 /* devfs */
3705 || sfs.f_type == 0xEF53 /* ext2/3 */
3706 || sfs.f_type == 0x3153464a /* jfs */
3707 || sfs.f_type == 0x52654973 /* reiser3 */
3708 || sfs.f_type == 0x01021994 /* tempfs */
3709 || sfs.f_type == 0x58465342 /* xfs */))
3710 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3711 else
3712 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3713 }
3714 else
3715 {
3716 /* can't use inotify, continue to stat */
3717 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3718
3719 /* if path is not there, monitor some parent directory for speedup hints */
3720 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3721 /* but an efficiency issue only */
3722 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
3723 {
3724 char path [4096];
3725 strcpy (path, w->path);
3726
3727 do
3728 {
3729 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
3730 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
3731
3732 char *pend = strrchr (path, '/');
3733
3734 if (!pend || pend == path)
3735 break;
3736
3737 *pend = 0;
3738 w->wd = inotify_add_watch (fs_fd, path, mask);
3739 }
3740 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3741 }
3742 }
3743
3744 if (w->wd >= 0)
3745 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3746
3747 /* now re-arm timer, if required */
3748 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3749 ev_timer_again (EV_A_ &w->timer);
3750 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3751}
3752
3753static void noinline
3754infy_del (EV_P_ ev_stat *w)
3755{
3756 int slot;
3757 int wd = w->wd;
3758
3759 if (wd < 0)
3760 return;
3761
3762 w->wd = -2;
3763 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3764 wlist_del (&fs_hash [slot].head, (WL)w);
3765
3766 /* remove this watcher, if others are watching it, they will rearm */
3767 inotify_rm_watch (fs_fd, wd);
3768}
3769
3770static void noinline
3771infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3772{
3773 if (slot < 0)
3774 /* overflow, need to check for all hash slots */
3775 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3776 infy_wd (EV_A_ slot, wd, ev);
3777 else
3778 {
3779 WL w_;
3780
3781 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3782 {
3783 ev_stat *w = (ev_stat *)w_;
3784 w_ = w_->next; /* lets us remove this watcher and all before it */
3785
3786 if (w->wd == wd || wd == -1)
3787 {
3788 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3789 {
3790 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3791 w->wd = -1;
3792 infy_add (EV_A_ w); /* re-add, no matter what */
3793 }
3794
3795 stat_timer_cb (EV_A_ &w->timer, 0);
3796 }
3797 }
390 } 3798 }
391} 3799}
392 3800
393static void 3801static void
394time_update () 3802infy_cb (EV_P_ ev_io *w, int revents)
395{ 3803{
3804 char buf [EV_INOTIFY_BUFSIZE];
396 int i; 3805 int ofs;
397 ev_now = ev_time (); 3806 int len = read (fs_fd, buf, sizeof (buf));
398 3807
399 if (have_monotonic) 3808 for (ofs = 0; ofs < len; )
3809 {
3810 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3811 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3812 ofs += sizeof (struct inotify_event) + ev->len;
400 { 3813 }
401 ev_tstamp odiff = diff; 3814}
402 3815
403 /* detecting time jumps is much more difficult */ 3816inline_size void ecb_cold
404 for (i = 2; --i; ) /* loop a few times, before making important decisions */ 3817ev_check_2625 (EV_P)
3818{
3819 /* kernels < 2.6.25 are borked
3820 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3821 */
3822 if (ev_linux_version () < 0x020619)
3823 return;
3824
3825 fs_2625 = 1;
3826}
3827
3828inline_size int
3829infy_newfd (void)
3830{
3831#if defined IN_CLOEXEC && defined IN_NONBLOCK
3832 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3833 if (fd >= 0)
3834 return fd;
3835#endif
3836 return inotify_init ();
3837}
3838
3839inline_size void
3840infy_init (EV_P)
3841{
3842 if (fs_fd != -2)
3843 return;
3844
3845 fs_fd = -1;
3846
3847 ev_check_2625 (EV_A);
3848
3849 fs_fd = infy_newfd ();
3850
3851 if (fs_fd >= 0)
3852 {
3853 fd_intern (fs_fd);
3854 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3855 ev_set_priority (&fs_w, EV_MAXPRI);
3856 ev_io_start (EV_A_ &fs_w);
3857 ev_unref (EV_A);
3858 }
3859}
3860
3861inline_size void
3862infy_fork (EV_P)
3863{
3864 int slot;
3865
3866 if (fs_fd < 0)
3867 return;
3868
3869 ev_ref (EV_A);
3870 ev_io_stop (EV_A_ &fs_w);
3871 close (fs_fd);
3872 fs_fd = infy_newfd ();
3873
3874 if (fs_fd >= 0)
3875 {
3876 fd_intern (fs_fd);
3877 ev_io_set (&fs_w, fs_fd, EV_READ);
3878 ev_io_start (EV_A_ &fs_w);
3879 ev_unref (EV_A);
3880 }
3881
3882 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3883 {
3884 WL w_ = fs_hash [slot].head;
3885 fs_hash [slot].head = 0;
3886
3887 while (w_)
405 { 3888 {
406 now = get_clock (); 3889 ev_stat *w = (ev_stat *)w_;
407 diff = ev_now - now; 3890 w_ = w_->next; /* lets us add this watcher */
408 3891
409 if (fabs (odiff - diff) < MIN_TIMEJUMP) 3892 w->wd = -1;
410 return; /* all is well */
411 3893
412 ev_now = ev_time (); 3894 if (fs_fd >= 0)
3895 infy_add (EV_A_ w); /* re-add, no matter what */
3896 else
3897 {
3898 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3899 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3900 ev_timer_again (EV_A_ &w->timer);
3901 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3902 }
413 } 3903 }
3904 }
3905}
414 3906
415 /* time jump detected, reschedule atimers */ 3907#endif
3908
3909#ifdef _WIN32
3910# define EV_LSTAT(p,b) _stati64 (p, b)
3911#else
3912# define EV_LSTAT(p,b) lstat (p, b)
3913#endif
3914
3915void
3916ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3917{
3918 if (lstat (w->path, &w->attr) < 0)
3919 w->attr.st_nlink = 0;
3920 else if (!w->attr.st_nlink)
3921 w->attr.st_nlink = 1;
3922}
3923
3924static void noinline
3925stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3926{
3927 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3928
3929 ev_statdata prev = w->attr;
3930 ev_stat_stat (EV_A_ w);
3931
3932 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3933 if (
3934 prev.st_dev != w->attr.st_dev
3935 || prev.st_ino != w->attr.st_ino
3936 || prev.st_mode != w->attr.st_mode
3937 || prev.st_nlink != w->attr.st_nlink
3938 || prev.st_uid != w->attr.st_uid
3939 || prev.st_gid != w->attr.st_gid
3940 || prev.st_rdev != w->attr.st_rdev
3941 || prev.st_size != w->attr.st_size
3942 || prev.st_atime != w->attr.st_atime
3943 || prev.st_mtime != w->attr.st_mtime
3944 || prev.st_ctime != w->attr.st_ctime
3945 ) {
3946 /* we only update w->prev on actual differences */
3947 /* in case we test more often than invoke the callback, */
3948 /* to ensure that prev is always different to attr */
3949 w->prev = prev;
3950
3951 #if EV_USE_INOTIFY
3952 if (fs_fd >= 0)
3953 {
3954 infy_del (EV_A_ w);
3955 infy_add (EV_A_ w);
3956 ev_stat_stat (EV_A_ w); /* avoid race... */
3957 }
3958 #endif
3959
3960 ev_feed_event (EV_A_ w, EV_STAT);
3961 }
3962}
3963
3964void
3965ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3966{
3967 if (expect_false (ev_is_active (w)))
3968 return;
3969
3970 ev_stat_stat (EV_A_ w);
3971
3972 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3973 w->interval = MIN_STAT_INTERVAL;
3974
3975 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3976 ev_set_priority (&w->timer, ev_priority (w));
3977
3978#if EV_USE_INOTIFY
3979 infy_init (EV_A);
3980
3981 if (fs_fd >= 0)
3982 infy_add (EV_A_ w);
3983 else
3984#endif
3985 {
3986 ev_timer_again (EV_A_ &w->timer);
3987 ev_unref (EV_A);
3988 }
3989
3990 ev_start (EV_A_ (W)w, 1);
3991
3992 EV_FREQUENT_CHECK;
3993}
3994
3995void
3996ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3997{
3998 clear_pending (EV_A_ (W)w);
3999 if (expect_false (!ev_is_active (w)))
4000 return;
4001
4002 EV_FREQUENT_CHECK;
4003
4004#if EV_USE_INOTIFY
4005 infy_del (EV_A_ w);
4006#endif
4007
4008 if (ev_is_active (&w->timer))
4009 {
4010 ev_ref (EV_A);
4011 ev_timer_stop (EV_A_ &w->timer);
4012 }
4013
4014 ev_stop (EV_A_ (W)w);
4015
4016 EV_FREQUENT_CHECK;
4017}
4018#endif
4019
4020#if EV_IDLE_ENABLE
4021void
4022ev_idle_start (EV_P_ ev_idle *w) EV_THROW
4023{
4024 if (expect_false (ev_is_active (w)))
4025 return;
4026
4027 pri_adjust (EV_A_ (W)w);
4028
4029 EV_FREQUENT_CHECK;
4030
4031 {
4032 int active = ++idlecnt [ABSPRI (w)];
4033
4034 ++idleall;
4035 ev_start (EV_A_ (W)w, active);
4036
4037 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
4038 idles [ABSPRI (w)][active - 1] = w;
4039 }
4040
4041 EV_FREQUENT_CHECK;
4042}
4043
4044void
4045ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
4046{
4047 clear_pending (EV_A_ (W)w);
4048 if (expect_false (!ev_is_active (w)))
4049 return;
4050
4051 EV_FREQUENT_CHECK;
4052
4053 {
4054 int active = ev_active (w);
4055
4056 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
4057 ev_active (idles [ABSPRI (w)][active - 1]) = active;
4058
4059 ev_stop (EV_A_ (W)w);
4060 --idleall;
4061 }
4062
4063 EV_FREQUENT_CHECK;
4064}
4065#endif
4066
4067#if EV_PREPARE_ENABLE
4068void
4069ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
4070{
4071 if (expect_false (ev_is_active (w)))
4072 return;
4073
4074 EV_FREQUENT_CHECK;
4075
4076 ev_start (EV_A_ (W)w, ++preparecnt);
4077 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
4078 prepares [preparecnt - 1] = w;
4079
4080 EV_FREQUENT_CHECK;
4081}
4082
4083void
4084ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
4085{
4086 clear_pending (EV_A_ (W)w);
4087 if (expect_false (!ev_is_active (w)))
4088 return;
4089
4090 EV_FREQUENT_CHECK;
4091
4092 {
4093 int active = ev_active (w);
4094
4095 prepares [active - 1] = prepares [--preparecnt];
4096 ev_active (prepares [active - 1]) = active;
4097 }
4098
4099 ev_stop (EV_A_ (W)w);
4100
4101 EV_FREQUENT_CHECK;
4102}
4103#endif
4104
4105#if EV_CHECK_ENABLE
4106void
4107ev_check_start (EV_P_ ev_check *w) EV_THROW
4108{
4109 if (expect_false (ev_is_active (w)))
4110 return;
4111
4112 EV_FREQUENT_CHECK;
4113
4114 ev_start (EV_A_ (W)w, ++checkcnt);
4115 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
4116 checks [checkcnt - 1] = w;
4117
4118 EV_FREQUENT_CHECK;
4119}
4120
4121void
4122ev_check_stop (EV_P_ ev_check *w) EV_THROW
4123{
4124 clear_pending (EV_A_ (W)w);
4125 if (expect_false (!ev_is_active (w)))
4126 return;
4127
4128 EV_FREQUENT_CHECK;
4129
4130 {
4131 int active = ev_active (w);
4132
4133 checks [active - 1] = checks [--checkcnt];
4134 ev_active (checks [active - 1]) = active;
4135 }
4136
4137 ev_stop (EV_A_ (W)w);
4138
4139 EV_FREQUENT_CHECK;
4140}
4141#endif
4142
4143#if EV_EMBED_ENABLE
4144void noinline
4145ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
4146{
4147 ev_run (w->other, EVRUN_NOWAIT);
4148}
4149
4150static void
4151embed_io_cb (EV_P_ ev_io *io, int revents)
4152{
4153 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
4154
4155 if (ev_cb (w))
4156 ev_feed_event (EV_A_ (W)w, EV_EMBED);
4157 else
4158 ev_run (w->other, EVRUN_NOWAIT);
4159}
4160
4161static void
4162embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4163{
4164 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4165
4166 {
4167 EV_P = w->other;
4168
4169 while (fdchangecnt)
4170 {
4171 fd_reify (EV_A);
4172 ev_run (EV_A_ EVRUN_NOWAIT);
4173 }
4174 }
4175}
4176
4177static void
4178embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4179{
4180 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4181
4182 ev_embed_stop (EV_A_ w);
4183
4184 {
4185 EV_P = w->other;
4186
4187 ev_loop_fork (EV_A);
4188 ev_run (EV_A_ EVRUN_NOWAIT);
4189 }
4190
4191 ev_embed_start (EV_A_ w);
4192}
4193
4194#if 0
4195static void
4196embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4197{
4198 ev_idle_stop (EV_A_ idle);
4199}
4200#endif
4201
4202void
4203ev_embed_start (EV_P_ ev_embed *w) EV_THROW
4204{
4205 if (expect_false (ev_is_active (w)))
4206 return;
4207
4208 {
4209 EV_P = w->other;
4210 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4211 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4212 }
4213
4214 EV_FREQUENT_CHECK;
4215
4216 ev_set_priority (&w->io, ev_priority (w));
4217 ev_io_start (EV_A_ &w->io);
4218
4219 ev_prepare_init (&w->prepare, embed_prepare_cb);
4220 ev_set_priority (&w->prepare, EV_MINPRI);
4221 ev_prepare_start (EV_A_ &w->prepare);
4222
4223 ev_fork_init (&w->fork, embed_fork_cb);
4224 ev_fork_start (EV_A_ &w->fork);
4225
4226 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4227
4228 ev_start (EV_A_ (W)w, 1);
4229
4230 EV_FREQUENT_CHECK;
4231}
4232
4233void
4234ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
4235{
4236 clear_pending (EV_A_ (W)w);
4237 if (expect_false (!ev_is_active (w)))
4238 return;
4239
4240 EV_FREQUENT_CHECK;
4241
4242 ev_io_stop (EV_A_ &w->io);
4243 ev_prepare_stop (EV_A_ &w->prepare);
4244 ev_fork_stop (EV_A_ &w->fork);
4245
4246 ev_stop (EV_A_ (W)w);
4247
4248 EV_FREQUENT_CHECK;
4249}
4250#endif
4251
4252#if EV_FORK_ENABLE
4253void
4254ev_fork_start (EV_P_ ev_fork *w) EV_THROW
4255{
4256 if (expect_false (ev_is_active (w)))
4257 return;
4258
4259 EV_FREQUENT_CHECK;
4260
4261 ev_start (EV_A_ (W)w, ++forkcnt);
4262 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4263 forks [forkcnt - 1] = w;
4264
4265 EV_FREQUENT_CHECK;
4266}
4267
4268void
4269ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
4270{
4271 clear_pending (EV_A_ (W)w);
4272 if (expect_false (!ev_is_active (w)))
4273 return;
4274
4275 EV_FREQUENT_CHECK;
4276
4277 {
4278 int active = ev_active (w);
4279
4280 forks [active - 1] = forks [--forkcnt];
4281 ev_active (forks [active - 1]) = active;
4282 }
4283
4284 ev_stop (EV_A_ (W)w);
4285
4286 EV_FREQUENT_CHECK;
4287}
4288#endif
4289
4290#if EV_CLEANUP_ENABLE
4291void
4292ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4293{
4294 if (expect_false (ev_is_active (w)))
4295 return;
4296
4297 EV_FREQUENT_CHECK;
4298
4299 ev_start (EV_A_ (W)w, ++cleanupcnt);
4300 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4301 cleanups [cleanupcnt - 1] = w;
4302
4303 /* cleanup watchers should never keep a refcount on the loop */
4304 ev_unref (EV_A);
4305 EV_FREQUENT_CHECK;
4306}
4307
4308void
4309ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4310{
4311 clear_pending (EV_A_ (W)w);
4312 if (expect_false (!ev_is_active (w)))
4313 return;
4314
4315 EV_FREQUENT_CHECK;
4316 ev_ref (EV_A);
4317
4318 {
4319 int active = ev_active (w);
4320
4321 cleanups [active - 1] = cleanups [--cleanupcnt];
4322 ev_active (cleanups [active - 1]) = active;
4323 }
4324
4325 ev_stop (EV_A_ (W)w);
4326
4327 EV_FREQUENT_CHECK;
4328}
4329#endif
4330
4331#if EV_ASYNC_ENABLE
4332void
4333ev_async_start (EV_P_ ev_async *w) EV_THROW
4334{
4335 if (expect_false (ev_is_active (w)))
4336 return;
4337
4338 w->sent = 0;
4339
4340 evpipe_init (EV_A);
4341
4342 EV_FREQUENT_CHECK;
4343
4344 ev_start (EV_A_ (W)w, ++asynccnt);
4345 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4346 asyncs [asynccnt - 1] = w;
4347
4348 EV_FREQUENT_CHECK;
4349}
4350
4351void
4352ev_async_stop (EV_P_ ev_async *w) EV_THROW
4353{
4354 clear_pending (EV_A_ (W)w);
4355 if (expect_false (!ev_is_active (w)))
4356 return;
4357
4358 EV_FREQUENT_CHECK;
4359
4360 {
4361 int active = ev_active (w);
4362
4363 asyncs [active - 1] = asyncs [--asynccnt];
4364 ev_active (asyncs [active - 1]) = active;
4365 }
4366
4367 ev_stop (EV_A_ (W)w);
4368
4369 EV_FREQUENT_CHECK;
4370}
4371
4372void
4373ev_async_send (EV_P_ ev_async *w) EV_THROW
4374{
4375 w->sent = 1;
4376 evpipe_write (EV_A_ &async_pending);
4377}
4378#endif
4379
4380/*****************************************************************************/
4381
4382struct ev_once
4383{
4384 ev_io io;
4385 ev_timer to;
4386 void (*cb)(int revents, void *arg);
4387 void *arg;
4388};
4389
4390static void
4391once_cb (EV_P_ struct ev_once *once, int revents)
4392{
4393 void (*cb)(int revents, void *arg) = once->cb;
4394 void *arg = once->arg;
4395
4396 ev_io_stop (EV_A_ &once->io);
4397 ev_timer_stop (EV_A_ &once->to);
4398 ev_free (once);
4399
4400 cb (revents, arg);
4401}
4402
4403static void
4404once_cb_io (EV_P_ ev_io *w, int revents)
4405{
4406 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4407
4408 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
4409}
4410
4411static void
4412once_cb_to (EV_P_ ev_timer *w, int revents)
4413{
4414 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4415
4416 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
4417}
4418
4419void
4420ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
4421{
4422 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
4423
4424 if (expect_false (!once))
4425 {
4426 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
4427 return;
4428 }
4429
4430 once->cb = cb;
4431 once->arg = arg;
4432
4433 ev_init (&once->io, once_cb_io);
4434 if (fd >= 0)
4435 {
4436 ev_io_set (&once->io, fd, events);
4437 ev_io_start (EV_A_ &once->io);
4438 }
4439
4440 ev_init (&once->to, once_cb_to);
4441 if (timeout >= 0.)
4442 {
4443 ev_timer_set (&once->to, timeout, 0.);
4444 ev_timer_start (EV_A_ &once->to);
4445 }
4446}
4447
4448/*****************************************************************************/
4449
4450#if EV_WALK_ENABLE
4451void ecb_cold
4452ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4453{
4454 int i, j;
4455 ev_watcher_list *wl, *wn;
4456
4457 if (types & (EV_IO | EV_EMBED))
416 for (i = 0; i < atimercnt; ++i) 4458 for (i = 0; i < anfdmax; ++i)
4459 for (wl = anfds [i].head; wl; )
417 { 4460 {
418 struct ev_timer *w = atimers [i]; 4461 wn = wl->next;
419 w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat; 4462
4463#if EV_EMBED_ENABLE
4464 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4465 {
4466 if (types & EV_EMBED)
4467 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4468 }
4469 else
4470#endif
4471#if EV_USE_INOTIFY
4472 if (ev_cb ((ev_io *)wl) == infy_cb)
4473 ;
4474 else
4475#endif
4476 if ((ev_io *)wl != &pipe_w)
4477 if (types & EV_IO)
4478 cb (EV_A_ EV_IO, wl);
4479
4480 wl = wn;
420 } 4481 }
421 }
422 else
423 {
424 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
425 /* time jump detected, adjust rtimers */
426 for (i = 0; i < rtimercnt; ++i)
427 rtimers [i]->at += ev_now - now;
428 4482
429 now = ev_now; 4483 if (types & (EV_TIMER | EV_STAT))
430 } 4484 for (i = timercnt + HEAP0; i-- > HEAP0; )
431} 4485#if EV_STAT_ENABLE
432 4486 /*TODO: timer is not always active*/
433int ev_loop_done; 4487 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
434 4488 {
435void ev_loop (int flags) 4489 if (types & EV_STAT)
436{ 4490 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
437 double block; 4491 }
438 ev_loop_done = flags & EVLOOP_ONESHOT;
439
440 do
441 {
442 /* update fd-related kernel structures */
443 fd_reify ();
444
445 /* calculate blocking time */
446 if (flags & EVLOOP_NONBLOCK)
447 block = 0.;
448 else 4492 else
4493#endif
4494 if (types & EV_TIMER)
4495 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4496
4497#if EV_PERIODIC_ENABLE
4498 if (types & EV_PERIODIC)
4499 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4500 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4501#endif
4502
4503#if EV_IDLE_ENABLE
4504 if (types & EV_IDLE)
4505 for (j = NUMPRI; j--; )
4506 for (i = idlecnt [j]; i--; )
4507 cb (EV_A_ EV_IDLE, idles [j][i]);
4508#endif
4509
4510#if EV_FORK_ENABLE
4511 if (types & EV_FORK)
4512 for (i = forkcnt; i--; )
4513 if (ev_cb (forks [i]) != embed_fork_cb)
4514 cb (EV_A_ EV_FORK, forks [i]);
4515#endif
4516
4517#if EV_ASYNC_ENABLE
4518 if (types & EV_ASYNC)
4519 for (i = asynccnt; i--; )
4520 cb (EV_A_ EV_ASYNC, asyncs [i]);
4521#endif
4522
4523#if EV_PREPARE_ENABLE
4524 if (types & EV_PREPARE)
4525 for (i = preparecnt; i--; )
4526# if EV_EMBED_ENABLE
4527 if (ev_cb (prepares [i]) != embed_prepare_cb)
4528# endif
4529 cb (EV_A_ EV_PREPARE, prepares [i]);
4530#endif
4531
4532#if EV_CHECK_ENABLE
4533 if (types & EV_CHECK)
4534 for (i = checkcnt; i--; )
4535 cb (EV_A_ EV_CHECK, checks [i]);
4536#endif
4537
4538#if EV_SIGNAL_ENABLE
4539 if (types & EV_SIGNAL)
4540 for (i = 0; i < EV_NSIG - 1; ++i)
4541 for (wl = signals [i].head; wl; )
449 { 4542 {
450 block = MAX_BLOCKTIME; 4543 wn = wl->next;
451 4544 cb (EV_A_ EV_SIGNAL, wl);
452 if (rtimercnt) 4545 wl = wn;
453 {
454 ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;
455 if (block > to) block = to;
456 }
457
458 if (atimercnt)
459 {
460 ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;
461 if (block > to) block = to;
462 }
463
464 if (block < 0.) block = 0.;
465 } 4546 }
4547#endif
466 4548
467 method_poll (block); 4549#if EV_CHILD_ENABLE
468 4550 if (types & EV_CHILD)
469 /* update ev_now, do magic */ 4551 for (i = (EV_PID_HASHSIZE); i--; )
470 time_update (); 4552 for (wl = childs [i]; wl; )
471
472 /* put pending timers into pendign queue and reschedule them */
473 /* absolute timers first */
474 timers_reify (atimers, atimercnt, ev_now);
475 /* relative timers second */
476 timers_reify (rtimers, rtimercnt, now);
477
478 call_pending ();
479 }
480 while (!ev_loop_done);
481}
482
483static void
484wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)
485{
486 elem->next = *head;
487 *head = elem;
488}
489
490static void
491wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)
492{
493 while (*head)
494 {
495 if (*head == elem)
496 { 4553 {
497 *head = elem->next; 4554 wn = wl->next;
498 return; 4555 cb (EV_A_ EV_CHILD, wl);
4556 wl = wn;
499 } 4557 }
500
501 head = &(*head)->next;
502 }
503}
504
505static void
506ev_start (struct ev_watcher *w, int active)
507{
508 w->pending = 0;
509 w->active = active;
510}
511
512static void
513ev_stop (struct ev_watcher *w)
514{
515 if (w->pending)
516 pendings [w->pending - 1].w = 0;
517
518 w->active = 0;
519 /* nop */
520}
521
522void
523evio_start (struct ev_io *w)
524{
525 if (ev_is_active (w))
526 return;
527
528 int fd = w->fd;
529
530 ev_start ((struct ev_watcher *)w, 1);
531 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
532 wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
533
534 ++fdchangecnt;
535 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
536 fdchanges [fdchangecnt - 1] = fd;
537}
538
539void
540evio_stop (struct ev_io *w)
541{
542 if (!ev_is_active (w))
543 return;
544
545 wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);
546 ev_stop ((struct ev_watcher *)w);
547
548 ++fdchangecnt;
549 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
550 fdchanges [fdchangecnt - 1] = w->fd;
551}
552
553void
554evtimer_start (struct ev_timer *w)
555{
556 if (ev_is_active (w))
557 return;
558
559 if (w->is_abs)
560 {
561 /* this formula differs from the one in timer_reify becuse we do not round up */
562 if (w->repeat)
563 w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
564
565 ev_start ((struct ev_watcher *)w, ++atimercnt);
566 array_needsize (atimers, atimermax, atimercnt, );
567 atimers [atimercnt - 1] = w;
568 upheap (atimers, atimercnt - 1);
569 }
570 else
571 {
572 w->at += now;
573
574 ev_start ((struct ev_watcher *)w, ++rtimercnt);
575 array_needsize (rtimers, rtimermax, rtimercnt, );
576 rtimers [rtimercnt - 1] = w;
577 upheap (rtimers, rtimercnt - 1);
578 }
579
580}
581
582void
583evtimer_stop (struct ev_timer *w)
584{
585 if (!ev_is_active (w))
586 return;
587
588 if (w->is_abs)
589 {
590 if (w->active < atimercnt--)
591 {
592 atimers [w->active - 1] = atimers [atimercnt];
593 downheap (atimers, atimercnt, w->active - 1);
594 }
595 }
596 else
597 {
598 if (w->active < rtimercnt--)
599 {
600 rtimers [w->active - 1] = rtimers [rtimercnt];
601 downheap (rtimers, rtimercnt, w->active - 1);
602 }
603 }
604
605 ev_stop ((struct ev_watcher *)w);
606}
607
608void
609evsignal_start (struct ev_signal *w)
610{
611 if (ev_is_active (w))
612 return;
613
614 ev_start ((struct ev_watcher *)w, 1);
615 array_needsize (signals, signalmax, w->signum, signals_init);
616 wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);
617
618 if (!w->next)
619 {
620 struct sigaction sa;
621 sa.sa_handler = sighandler;
622 sigfillset (&sa.sa_mask);
623 sa.sa_flags = 0;
624 sigaction (w->signum, &sa, 0);
625 }
626}
627
628void
629evsignal_stop (struct ev_signal *w)
630{
631 if (!ev_is_active (w))
632 return;
633
634 wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);
635 ev_stop ((struct ev_watcher *)w);
636
637 if (!signals [w->signum - 1].head)
638 signal (w->signum, SIG_DFL);
639}
640
641/*****************************************************************************/
642#if 1
643
644static void
645sin_cb (struct ev_io *w, int revents)
646{
647 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
648}
649
650static void
651ocb (struct ev_timer *w, int revents)
652{
653 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
654 evtimer_stop (w);
655 evtimer_start (w);
656}
657
658static void
659scb (struct ev_signal *w, int revents)
660{
661 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
662}
663
664int main (void)
665{
666 struct ev_io sin;
667
668 ev_init (0);
669
670 evw_init (&sin, sin_cb, 55);
671 evio_set (&sin, 0, EV_READ);
672 evio_start (&sin);
673
674 struct ev_timer t[10000];
675
676#if 0
677 int i;
678 for (i = 0; i < 10000; ++i)
679 {
680 struct ev_timer *w = t + i;
681 evw_init (w, ocb, i);
682 evtimer_set_abs (w, drand48 (), 0.99775533);
683 evtimer_start (w);
684 if (drand48 () < 0.5)
685 evtimer_stop (w);
686 }
687#endif 4558#endif
688 4559/* EV_STAT 0x00001000 /* stat data changed */
689 struct ev_timer t1; 4560/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
690 evw_init (&t1, ocb, 0);
691 evtimer_set_abs (&t1, 5, 10);
692 evtimer_start (&t1);
693
694 struct ev_signal sig;
695 evw_init (&sig, scb, 65535);
696 evsignal_set (&sig, SIGQUIT);
697 evsignal_start (&sig);
698
699 ev_loop (0);
700
701 return 0;
702} 4561}
703
704#endif 4562#endif
705 4563
4564#if EV_MULTIPLICITY
4565 #include "ev_wrap.h"
4566#endif
706 4567
707
708

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