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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 1.480 by root, Thu Feb 18 04:48:05 2016 UTC

1#include <math.h> 1/*
2 * libev event processing core, watcher management
3 *
4 * Copyright (c) 2007,2008,2009,2010,2011,2012,2013 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# define EV_NSIG (8 * sizeof (sigset_t) + 1)
247#endif
248
249#ifndef EV_USE_FLOOR
250# define EV_USE_FLOOR 0
251#endif
252
253#ifndef EV_USE_CLOCK_SYSCALL
254# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
255# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
256# else
257# define EV_USE_CLOCK_SYSCALL 0
258# endif
259#endif
260
261#if !(_POSIX_TIMERS > 0)
262# ifndef EV_USE_MONOTONIC
263# define EV_USE_MONOTONIC 0
264# endif
265# ifndef EV_USE_REALTIME
266# define EV_USE_REALTIME 0
267# endif
268#endif
269
270#ifndef EV_USE_MONOTONIC
271# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
272# define EV_USE_MONOTONIC EV_FEATURE_OS
273# else
274# define EV_USE_MONOTONIC 0
275# endif
276#endif
277
278#ifndef EV_USE_REALTIME
279# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
280#endif
281
282#ifndef EV_USE_NANOSLEEP
283# if _POSIX_C_SOURCE >= 199309L
284# define EV_USE_NANOSLEEP EV_FEATURE_OS
285# else
286# define EV_USE_NANOSLEEP 0
287# endif
288#endif
289
290#ifndef EV_USE_SELECT
291# define EV_USE_SELECT EV_FEATURE_BACKENDS
292#endif
293
294#ifndef EV_USE_POLL
295# ifdef _WIN32
296# define EV_USE_POLL 0
297# else
298# define EV_USE_POLL EV_FEATURE_BACKENDS
299# endif
300#endif
301
302#ifndef EV_USE_EPOLL
303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
304# define EV_USE_EPOLL EV_FEATURE_BACKENDS
305# else
306# define EV_USE_EPOLL 0
307# endif
308#endif
309
310#ifndef EV_USE_KQUEUE
311# define EV_USE_KQUEUE 0
312#endif
313
314#ifndef EV_USE_PORT
315# define EV_USE_PORT 0
316#endif
317
318#ifndef EV_USE_INOTIFY
319# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
320# define EV_USE_INOTIFY EV_FEATURE_OS
321# else
322# define EV_USE_INOTIFY 0
323# endif
324#endif
325
326#ifndef EV_PID_HASHSIZE
327# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
328#endif
329
330#ifndef EV_INOTIFY_HASHSIZE
331# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
332#endif
333
334#ifndef EV_USE_EVENTFD
335# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
336# define EV_USE_EVENTFD EV_FEATURE_OS
337# else
338# define EV_USE_EVENTFD 0
339# endif
340#endif
341
342#ifndef EV_USE_SIGNALFD
343# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
344# define EV_USE_SIGNALFD EV_FEATURE_OS
345# else
346# define EV_USE_SIGNALFD 0
347# endif
348#endif
349
350#if 0 /* debugging */
351# define EV_VERIFY 3
352# define EV_USE_4HEAP 1
353# define EV_HEAP_CACHE_AT 1
354#endif
355
356#ifndef EV_VERIFY
357# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
358#endif
359
360#ifndef EV_USE_4HEAP
361# define EV_USE_4HEAP EV_FEATURE_DATA
362#endif
363
364#ifndef EV_HEAP_CACHE_AT
365# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
366#endif
367
368#ifdef ANDROID
369/* supposedly, android doesn't typedef fd_mask */
370# undef EV_USE_SELECT
371# define EV_USE_SELECT 0
372/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
373# undef EV_USE_CLOCK_SYSCALL
374# define EV_USE_CLOCK_SYSCALL 0
375#endif
376
377/* aix's poll.h seems to cause lots of trouble */
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
384/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
385/* which makes programs even slower. might work on other unices, too. */
386#if EV_USE_CLOCK_SYSCALL
387# include <sys/syscall.h>
388# ifdef SYS_clock_gettime
389# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
390# undef EV_USE_MONOTONIC
391# define EV_USE_MONOTONIC 1
392# else
393# undef EV_USE_CLOCK_SYSCALL
394# define EV_USE_CLOCK_SYSCALL 0
395# endif
396#endif
397
398/* this block fixes any misconfiguration where we know we run into trouble otherwise */
399
14#ifdef CLOCK_MONOTONIC 400#ifndef CLOCK_MONOTONIC
401# undef EV_USE_MONOTONIC
15# define HAVE_MONOTONIC 1 402# define EV_USE_MONOTONIC 0
403#endif
404
405#ifndef CLOCK_REALTIME
406# undef EV_USE_REALTIME
407# define EV_USE_REALTIME 0
408#endif
409
410#if !EV_STAT_ENABLE
411# undef EV_USE_INOTIFY
412# define EV_USE_INOTIFY 0
413#endif
414
415#if !EV_USE_NANOSLEEP
416/* hp-ux has it in sys/time.h, which we unconditionally include above */
417# if !defined _WIN32 && !defined __hpux
418# include <sys/select.h>
16#endif 419# endif
420#endif
17 421
18#define HAVE_REALTIME 1 422#if EV_USE_INOTIFY
19#define HAVE_EPOLL 1 423# include <sys/statfs.h>
20#define HAVE_SELECT 1 424# include <sys/inotify.h>
425/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
426# ifndef IN_DONT_FOLLOW
427# undef EV_USE_INOTIFY
428# define EV_USE_INOTIFY 0
429# endif
430#endif
431
432#if EV_USE_EVENTFD
433/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
434# include <stdint.h>
435# ifndef EFD_NONBLOCK
436# define EFD_NONBLOCK O_NONBLOCK
437# endif
438# ifndef EFD_CLOEXEC
439# ifdef O_CLOEXEC
440# define EFD_CLOEXEC O_CLOEXEC
441# else
442# define EFD_CLOEXEC 02000000
443# endif
444# endif
445EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
446#endif
447
448#if EV_USE_SIGNALFD
449/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
450# include <stdint.h>
451# ifndef SFD_NONBLOCK
452# define SFD_NONBLOCK O_NONBLOCK
453# endif
454# ifndef SFD_CLOEXEC
455# ifdef O_CLOEXEC
456# define SFD_CLOEXEC O_CLOEXEC
457# else
458# define SFD_CLOEXEC 02000000
459# endif
460# endif
461EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
462
463struct signalfd_siginfo
464{
465 uint32_t ssi_signo;
466 char pad[128 - sizeof (uint32_t)];
467};
468#endif
469
470/**/
471
472#if EV_VERIFY >= 3
473# define EV_FREQUENT_CHECK ev_verify (EV_A)
474#else
475# define EV_FREQUENT_CHECK do { } while (0)
476#endif
477
478/*
479 * This is used to work around floating point rounding problems.
480 * This value is good at least till the year 4000.
481 */
482#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
483/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
21 484
22#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 485#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
23#define MAX_BLOCKTIME 60. 486#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
24 487
488#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
489#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
490
491/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
492/* ECB.H BEGIN */
493/*
494 * libecb - http://software.schmorp.de/pkg/libecb
495 *
496 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
497 * Copyright (©) 2011 Emanuele Giaquinta
498 * All rights reserved.
499 *
500 * Redistribution and use in source and binary forms, with or without modifica-
501 * tion, are permitted provided that the following conditions are met:
502 *
503 * 1. Redistributions of source code must retain the above copyright notice,
504 * this list of conditions and the following disclaimer.
505 *
506 * 2. Redistributions in binary form must reproduce the above copyright
507 * notice, this list of conditions and the following disclaimer in the
508 * documentation and/or other materials provided with the distribution.
509 *
510 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
511 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
512 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
513 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
514 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
515 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
516 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
517 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
518 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
519 * OF THE POSSIBILITY OF SUCH DAMAGE.
520 *
521 * Alternatively, the contents of this file may be used under the terms of
522 * the GNU General Public License ("GPL") version 2 or any later version,
523 * in which case the provisions of the GPL are applicable instead of
524 * the above. If you wish to allow the use of your version of this file
525 * only under the terms of the GPL and not to allow others to use your
526 * version of this file under the BSD license, indicate your decision
527 * by deleting the provisions above and replace them with the notice
528 * and other provisions required by the GPL. If you do not delete the
529 * provisions above, a recipient may use your version of this file under
530 * either the BSD or the GPL.
531 */
532
533#ifndef ECB_H
534#define ECB_H
535
536/* 16 bits major, 16 bits minor */
537#define ECB_VERSION 0x00010005
538
539#ifdef _WIN32
540 typedef signed char int8_t;
541 typedef unsigned char uint8_t;
542 typedef signed short int16_t;
543 typedef unsigned short uint16_t;
544 typedef signed int int32_t;
545 typedef unsigned int uint32_t;
546 #if __GNUC__
547 typedef signed long long int64_t;
548 typedef unsigned long long uint64_t;
549 #else /* _MSC_VER || __BORLANDC__ */
550 typedef signed __int64 int64_t;
551 typedef unsigned __int64 uint64_t;
552 #endif
553 #ifdef _WIN64
554 #define ECB_PTRSIZE 8
555 typedef uint64_t uintptr_t;
556 typedef int64_t intptr_t;
557 #else
558 #define ECB_PTRSIZE 4
559 typedef uint32_t uintptr_t;
560 typedef int32_t intptr_t;
561 #endif
562#else
563 #include <inttypes.h>
564 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
565 #define ECB_PTRSIZE 8
566 #else
567 #define ECB_PTRSIZE 4
568 #endif
569#endif
570
571#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
572#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
573
574/* work around x32 idiocy by defining proper macros */
575#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
576 #if _ILP32
577 #define ECB_AMD64_X32 1
578 #else
579 #define ECB_AMD64 1
580 #endif
581#endif
582
583/* many compilers define _GNUC_ to some versions but then only implement
584 * what their idiot authors think are the "more important" extensions,
585 * causing enormous grief in return for some better fake benchmark numbers.
586 * or so.
587 * we try to detect these and simply assume they are not gcc - if they have
588 * an issue with that they should have done it right in the first place.
589 */
590#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
591 #define ECB_GCC_VERSION(major,minor) 0
592#else
593 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
594#endif
595
596#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
597
598#if __clang__ && defined __has_builtin
599 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
600#else
601 #define ECB_CLANG_BUILTIN(x) 0
602#endif
603
604#if __clang__ && defined __has_extension
605 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
606#else
607 #define ECB_CLANG_EXTENSION(x) 0
608#endif
609
610#define ECB_CPP (__cplusplus+0)
611#define ECB_CPP11 (__cplusplus >= 201103L)
612
613#if ECB_CPP
614 #define ECB_C 0
615 #define ECB_STDC_VERSION 0
616#else
617 #define ECB_C 1
618 #define ECB_STDC_VERSION __STDC_VERSION__
619#endif
620
621#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
622#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
623
624#if ECB_CPP
625 #define ECB_EXTERN_C extern "C"
626 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
627 #define ECB_EXTERN_C_END }
628#else
629 #define ECB_EXTERN_C extern
630 #define ECB_EXTERN_C_BEG
631 #define ECB_EXTERN_C_END
632#endif
633
634/*****************************************************************************/
635
636/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
637/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
638
639#if ECB_NO_THREADS
640 #define ECB_NO_SMP 1
641#endif
642
643#if ECB_NO_SMP
644 #define ECB_MEMORY_FENCE do { } while (0)
645#endif
646
647/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
648#if __xlC__ && ECB_CPP
649 #include <builtins.h>
650#endif
651
652#if 1400 <= _MSC_VER
653 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
654#endif
655
656#ifndef ECB_MEMORY_FENCE
657 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
658 #if __i386 || __i386__
659 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
660 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
661 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
662 #elif ECB_GCC_AMD64
663 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
664 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
665 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
666 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
667 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
668 #elif defined __ARM_ARCH_2__ \
669 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
670 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
671 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
672 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
673 || defined __ARM_ARCH_5TEJ__
674 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
675 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
676 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
677 || defined __ARM_ARCH_6T2__
678 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
679 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
680 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
681 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
682 #elif __aarch64__
683 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
684 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
685 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
686 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
687 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
688 #elif defined __s390__ || defined __s390x__
689 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
690 #elif defined __mips__
691 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
692 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
693 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
694 #elif defined __alpha__
695 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
696 #elif defined __hppa__
697 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
698 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
699 #elif defined __ia64__
700 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
701 #elif defined __m68k__
702 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
703 #elif defined __m88k__
704 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
705 #elif defined __sh__
706 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
707 #endif
708 #endif
709#endif
710
711#ifndef ECB_MEMORY_FENCE
712 #if ECB_GCC_VERSION(4,7)
713 /* see comment below (stdatomic.h) about the C11 memory model. */
714 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
715 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
716 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
717
718 #elif ECB_CLANG_EXTENSION(c_atomic)
719 /* see comment below (stdatomic.h) about the C11 memory model. */
720 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
721 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
722 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
723
724 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
725 #define ECB_MEMORY_FENCE __sync_synchronize ()
726 #elif _MSC_VER >= 1500 /* VC++ 2008 */
727 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
728 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
729 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
730 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
731 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
732 #elif _MSC_VER >= 1400 /* VC++ 2005 */
733 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
734 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
735 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
736 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
737 #elif defined _WIN32
738 #include <WinNT.h>
739 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
740 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
741 #include <mbarrier.h>
742 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
743 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
744 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
745 #elif __xlC__
746 #define ECB_MEMORY_FENCE __sync ()
747 #endif
748#endif
749
750#ifndef ECB_MEMORY_FENCE
751 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
752 /* we assume that these memory fences work on all variables/all memory accesses, */
753 /* not just C11 atomics and atomic accesses */
754 #include <stdatomic.h>
755 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
756 /* any fence other than seq_cst, which isn't very efficient for us. */
757 /* Why that is, we don't know - either the C11 memory model is quite useless */
758 /* for most usages, or gcc and clang have a bug */
759 /* I *currently* lean towards the latter, and inefficiently implement */
760 /* all three of ecb's fences as a seq_cst fence */
761 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
762 /* for all __atomic_thread_fence's except seq_cst */
763 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
764 #endif
765#endif
766
767#ifndef ECB_MEMORY_FENCE
768 #if !ECB_AVOID_PTHREADS
769 /*
770 * if you get undefined symbol references to pthread_mutex_lock,
771 * or failure to find pthread.h, then you should implement
772 * the ECB_MEMORY_FENCE operations for your cpu/compiler
773 * OR provide pthread.h and link against the posix thread library
774 * of your system.
775 */
776 #include <pthread.h>
777 #define ECB_NEEDS_PTHREADS 1
778 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
779
780 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
781 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
782 #endif
783#endif
784
785#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
786 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
787#endif
788
789#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
790 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
791#endif
792
793/*****************************************************************************/
794
795#if ECB_CPP
796 #define ecb_inline static inline
797#elif ECB_GCC_VERSION(2,5)
798 #define ecb_inline static __inline__
799#elif ECB_C99
800 #define ecb_inline static inline
801#else
802 #define ecb_inline static
803#endif
804
805#if ECB_GCC_VERSION(3,3)
806 #define ecb_restrict __restrict__
807#elif ECB_C99
808 #define ecb_restrict restrict
809#else
810 #define ecb_restrict
811#endif
812
813typedef int ecb_bool;
814
815#define ECB_CONCAT_(a, b) a ## b
816#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
817#define ECB_STRINGIFY_(a) # a
818#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
819#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
820
821#define ecb_function_ ecb_inline
822
823#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
824 #define ecb_attribute(attrlist) __attribute__ (attrlist)
825#else
826 #define ecb_attribute(attrlist)
827#endif
828
829#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
830 #define ecb_is_constant(expr) __builtin_constant_p (expr)
831#else
832 /* possible C11 impl for integral types
833 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
834 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
835
836 #define ecb_is_constant(expr) 0
837#endif
838
839#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
840 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
841#else
842 #define ecb_expect(expr,value) (expr)
843#endif
844
845#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
846 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
847#else
848 #define ecb_prefetch(addr,rw,locality)
849#endif
850
851/* no emulation for ecb_decltype */
852#if ECB_CPP11
853 // older implementations might have problems with decltype(x)::type, work around it
854 template<class T> struct ecb_decltype_t { typedef T type; };
855 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
856#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
857 #define ecb_decltype(x) __typeof__ (x)
858#endif
859
860#if _MSC_VER >= 1300
861 #define ecb_deprecated __declspec (deprecated)
862#else
863 #define ecb_deprecated ecb_attribute ((__deprecated__))
864#endif
865
866#if _MSC_VER >= 1500
867 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
868#elif ECB_GCC_VERSION(4,5)
869 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
870#else
871 #define ecb_deprecated_message(msg) ecb_deprecated
872#endif
873
874#if _MSC_VER >= 1400
875 #define ecb_noinline __declspec (noinline)
876#else
877 #define ecb_noinline ecb_attribute ((__noinline__))
878#endif
879
880#define ecb_unused ecb_attribute ((__unused__))
881#define ecb_const ecb_attribute ((__const__))
882#define ecb_pure ecb_attribute ((__pure__))
883
884#if ECB_C11 || __IBMC_NORETURN
885 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
886 #define ecb_noreturn _Noreturn
887#elif ECB_CPP11
888 #define ecb_noreturn [[noreturn]]
889#elif _MSC_VER >= 1200
890 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
891 #define ecb_noreturn __declspec (noreturn)
892#else
893 #define ecb_noreturn ecb_attribute ((__noreturn__))
894#endif
895
896#if ECB_GCC_VERSION(4,3)
897 #define ecb_artificial ecb_attribute ((__artificial__))
898 #define ecb_hot ecb_attribute ((__hot__))
899 #define ecb_cold ecb_attribute ((__cold__))
900#else
901 #define ecb_artificial
902 #define ecb_hot
903 #define ecb_cold
904#endif
905
906/* put around conditional expressions if you are very sure that the */
907/* expression is mostly true or mostly false. note that these return */
908/* booleans, not the expression. */
909#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
910#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
911/* for compatibility to the rest of the world */
912#define ecb_likely(expr) ecb_expect_true (expr)
913#define ecb_unlikely(expr) ecb_expect_false (expr)
914
915/* count trailing zero bits and count # of one bits */
916#if ECB_GCC_VERSION(3,4) \
917 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
918 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
919 && ECB_CLANG_BUILTIN(__builtin_popcount))
920 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
921 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
922 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
923 #define ecb_ctz32(x) __builtin_ctz (x)
924 #define ecb_ctz64(x) __builtin_ctzll (x)
925 #define ecb_popcount32(x) __builtin_popcount (x)
926 /* no popcountll */
927#else
928 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
929 ecb_function_ ecb_const int
930 ecb_ctz32 (uint32_t x)
931 {
932#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
933 unsigned long r;
934 _BitScanForward (&r, x);
935 return (int)r;
936#else
937 int r = 0;
938
939 x &= ~x + 1; /* this isolates the lowest bit */
940
941#if ECB_branchless_on_i386
942 r += !!(x & 0xaaaaaaaa) << 0;
943 r += !!(x & 0xcccccccc) << 1;
944 r += !!(x & 0xf0f0f0f0) << 2;
945 r += !!(x & 0xff00ff00) << 3;
946 r += !!(x & 0xffff0000) << 4;
947#else
948 if (x & 0xaaaaaaaa) r += 1;
949 if (x & 0xcccccccc) r += 2;
950 if (x & 0xf0f0f0f0) r += 4;
951 if (x & 0xff00ff00) r += 8;
952 if (x & 0xffff0000) r += 16;
953#endif
954
955 return r;
956#endif
957 }
958
959 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
960 ecb_function_ ecb_const int
961 ecb_ctz64 (uint64_t x)
962 {
963#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
964 unsigned long r;
965 _BitScanForward64 (&r, x);
966 return (int)r;
967#else
968 int shift = x & 0xffffffff ? 0 : 32;
969 return ecb_ctz32 (x >> shift) + shift;
970#endif
971 }
972
973 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
974 ecb_function_ ecb_const int
975 ecb_popcount32 (uint32_t x)
976 {
977 x -= (x >> 1) & 0x55555555;
978 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
979 x = ((x >> 4) + x) & 0x0f0f0f0f;
980 x *= 0x01010101;
981
982 return x >> 24;
983 }
984
985 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
986 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
987 {
988#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
989 unsigned long r;
990 _BitScanReverse (&r, x);
991 return (int)r;
992#else
993 int r = 0;
994
995 if (x >> 16) { x >>= 16; r += 16; }
996 if (x >> 8) { x >>= 8; r += 8; }
997 if (x >> 4) { x >>= 4; r += 4; }
998 if (x >> 2) { x >>= 2; r += 2; }
999 if (x >> 1) { r += 1; }
1000
1001 return r;
1002#endif
1003 }
1004
1005 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1006 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1007 {
1008#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1009 unsigned long r;
1010 _BitScanReverse64 (&r, x);
1011 return (int)r;
1012#else
1013 int r = 0;
1014
1015 if (x >> 32) { x >>= 32; r += 32; }
1016
1017 return r + ecb_ld32 (x);
1018#endif
1019 }
1020#endif
1021
1022ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1023ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1024ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1025ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1026
1027ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1028ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1029{
1030 return ( (x * 0x0802U & 0x22110U)
1031 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1032}
1033
1034ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1035ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1036{
1037 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1038 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1039 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1040 x = ( x >> 8 ) | ( x << 8);
1041
1042 return x;
1043}
1044
1045ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1046ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1047{
1048 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1049 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1050 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1051 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1052 x = ( x >> 16 ) | ( x << 16);
1053
1054 return x;
1055}
1056
1057/* popcount64 is only available on 64 bit cpus as gcc builtin */
1058/* so for this version we are lazy */
1059ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1060ecb_function_ ecb_const int
1061ecb_popcount64 (uint64_t x)
1062{
1063 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1064}
1065
1066ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1067ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1068ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1069ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1070ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1071ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1072ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1073ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1074
1075ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1076ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1077ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1078ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1079ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1080ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1081ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1082ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1083
1084#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1085 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1086 #define ecb_bswap16(x) __builtin_bswap16 (x)
1087 #else
1088 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1089 #endif
1090 #define ecb_bswap32(x) __builtin_bswap32 (x)
1091 #define ecb_bswap64(x) __builtin_bswap64 (x)
1092#elif _MSC_VER
1093 #include <stdlib.h>
1094 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1095 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1096 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1097#else
1098 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1099 ecb_function_ ecb_const uint16_t
1100 ecb_bswap16 (uint16_t x)
1101 {
1102 return ecb_rotl16 (x, 8);
1103 }
1104
1105 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1106 ecb_function_ ecb_const uint32_t
1107 ecb_bswap32 (uint32_t x)
1108 {
1109 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1110 }
1111
1112 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1113 ecb_function_ ecb_const uint64_t
1114 ecb_bswap64 (uint64_t x)
1115 {
1116 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1117 }
1118#endif
1119
1120#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1121 #define ecb_unreachable() __builtin_unreachable ()
1122#else
1123 /* this seems to work fine, but gcc always emits a warning for it :/ */
1124 ecb_inline ecb_noreturn void ecb_unreachable (void);
1125 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1126#endif
1127
1128/* try to tell the compiler that some condition is definitely true */
1129#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1130
1131ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1132ecb_inline ecb_const uint32_t
1133ecb_byteorder_helper (void)
1134{
1135 /* the union code still generates code under pressure in gcc, */
1136 /* but less than using pointers, and always seems to */
1137 /* successfully return a constant. */
1138 /* the reason why we have this horrible preprocessor mess */
1139 /* is to avoid it in all cases, at least on common architectures */
1140 /* or when using a recent enough gcc version (>= 4.6) */
1141#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1142 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1143 #define ECB_LITTLE_ENDIAN 1
1144 return 0x44332211;
1145#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1146 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1147 #define ECB_BIG_ENDIAN 1
1148 return 0x11223344;
1149#else
1150 union
1151 {
1152 uint8_t c[4];
1153 uint32_t u;
1154 } u = { 0x11, 0x22, 0x33, 0x44 };
1155 return u.u;
1156#endif
1157}
1158
1159ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1160ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1161ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1162ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1163
1164#if ECB_GCC_VERSION(3,0) || ECB_C99
1165 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1166#else
1167 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1168#endif
1169
1170#if ECB_CPP
1171 template<typename T>
1172 static inline T ecb_div_rd (T val, T div)
1173 {
1174 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1175 }
1176 template<typename T>
1177 static inline T ecb_div_ru (T val, T div)
1178 {
1179 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1180 }
1181#else
1182 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1183 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1184#endif
1185
1186#if ecb_cplusplus_does_not_suck
1187 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1188 template<typename T, int N>
1189 static inline int ecb_array_length (const T (&arr)[N])
1190 {
1191 return N;
1192 }
1193#else
1194 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1195#endif
1196
1197ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1198ecb_function_ ecb_const uint32_t
1199ecb_binary16_to_binary32 (uint32_t x)
1200{
1201 unsigned int s = (x & 0x8000) << (31 - 15);
1202 int e = (x >> 10) & 0x001f;
1203 unsigned int m = x & 0x03ff;
1204
1205 if (ecb_expect_false (e == 31))
1206 /* infinity or NaN */
1207 e = 255 - (127 - 15);
1208 else if (ecb_expect_false (!e))
1209 {
1210 if (ecb_expect_true (!m))
1211 /* zero, handled by code below by forcing e to 0 */
1212 e = 0 - (127 - 15);
1213 else
1214 {
1215 /* subnormal, renormalise */
1216 unsigned int s = 10 - ecb_ld32 (m);
1217
1218 m = (m << s) & 0x3ff; /* mask implicit bit */
1219 e -= s - 1;
1220 }
1221 }
1222
1223 /* e and m now are normalised, or zero, (or inf or nan) */
1224 e += 127 - 15;
1225
1226 return s | (e << 23) | (m << (23 - 10));
1227}
1228
1229ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1230ecb_function_ ecb_const uint16_t
1231ecb_binary32_to_binary16 (uint32_t x)
1232{
1233 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1234 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1235 unsigned int m = x & 0x007fffff;
1236
1237 x &= 0x7fffffff;
1238
1239 /* if it's within range of binary16 normals, use fast path */
1240 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1241 {
1242 /* mantissa round-to-even */
1243 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1244
1245 /* handle overflow */
1246 if (ecb_expect_false (m >= 0x00800000))
1247 {
1248 m >>= 1;
1249 e += 1;
1250 }
1251
1252 return s | (e << 10) | (m >> (23 - 10));
1253 }
1254
1255 /* handle large numbers and infinity */
1256 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1257 return s | 0x7c00;
1258
1259 /* handle zero, subnormals and small numbers */
1260 if (ecb_expect_true (x < 0x38800000))
1261 {
1262 /* zero */
1263 if (ecb_expect_true (!x))
1264 return s;
1265
1266 /* handle subnormals */
1267
1268 /* too small, will be zero */
1269 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1270 return s;
1271
1272 m |= 0x00800000; /* make implicit bit explicit */
1273
1274 /* very tricky - we need to round to the nearest e (+10) bit value */
1275 {
1276 unsigned int bits = 14 - e;
1277 unsigned int half = (1 << (bits - 1)) - 1;
1278 unsigned int even = (m >> bits) & 1;
1279
1280 /* if this overflows, we will end up with a normalised number */
1281 m = (m + half + even) >> bits;
1282 }
1283
1284 return s | m;
1285 }
1286
1287 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1288 m >>= 13;
1289
1290 return s | 0x7c00 | m | !m;
1291}
1292
1293/*******************************************************************************/
1294/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1295
1296/* basically, everything uses "ieee pure-endian" floating point numbers */
1297/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1298#if 0 \
1299 || __i386 || __i386__ \
1300 || ECB_GCC_AMD64 \
1301 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1302 || defined __s390__ || defined __s390x__ \
1303 || defined __mips__ \
1304 || defined __alpha__ \
1305 || defined __hppa__ \
1306 || defined __ia64__ \
1307 || defined __m68k__ \
1308 || defined __m88k__ \
1309 || defined __sh__ \
1310 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1311 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1312 || defined __aarch64__
1313 #define ECB_STDFP 1
1314 #include <string.h> /* for memcpy */
1315#else
1316 #define ECB_STDFP 0
1317#endif
1318
1319#ifndef ECB_NO_LIBM
1320
1321 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1322
1323 /* only the oldest of old doesn't have this one. solaris. */
1324 #ifdef INFINITY
1325 #define ECB_INFINITY INFINITY
1326 #else
1327 #define ECB_INFINITY HUGE_VAL
1328 #endif
1329
1330 #ifdef NAN
1331 #define ECB_NAN NAN
1332 #else
1333 #define ECB_NAN ECB_INFINITY
1334 #endif
1335
1336 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1337 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1338 #define ecb_frexpf(x,e) frexpf ((x), (e))
1339 #else
1340 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1341 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1342 #endif
1343
1344 /* convert a float to ieee single/binary32 */
1345 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1346 ecb_function_ ecb_const uint32_t
1347 ecb_float_to_binary32 (float x)
1348 {
1349 uint32_t r;
1350
1351 #if ECB_STDFP
1352 memcpy (&r, &x, 4);
1353 #else
1354 /* slow emulation, works for anything but -0 */
1355 uint32_t m;
1356 int e;
1357
1358 if (x == 0e0f ) return 0x00000000U;
1359 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1360 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1361 if (x != x ) return 0x7fbfffffU;
1362
1363 m = ecb_frexpf (x, &e) * 0x1000000U;
1364
1365 r = m & 0x80000000U;
1366
1367 if (r)
1368 m = -m;
1369
1370 if (e <= -126)
1371 {
1372 m &= 0xffffffU;
1373 m >>= (-125 - e);
1374 e = -126;
1375 }
1376
1377 r |= (e + 126) << 23;
1378 r |= m & 0x7fffffU;
1379 #endif
1380
1381 return r;
1382 }
1383
1384 /* converts an ieee single/binary32 to a float */
1385 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1386 ecb_function_ ecb_const float
1387 ecb_binary32_to_float (uint32_t x)
1388 {
1389 float r;
1390
1391 #if ECB_STDFP
1392 memcpy (&r, &x, 4);
1393 #else
1394 /* emulation, only works for normals and subnormals and +0 */
1395 int neg = x >> 31;
1396 int e = (x >> 23) & 0xffU;
1397
1398 x &= 0x7fffffU;
1399
1400 if (e)
1401 x |= 0x800000U;
1402 else
1403 e = 1;
1404
1405 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1406 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1407
1408 r = neg ? -r : r;
1409 #endif
1410
1411 return r;
1412 }
1413
1414 /* convert a double to ieee double/binary64 */
1415 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1416 ecb_function_ ecb_const uint64_t
1417 ecb_double_to_binary64 (double x)
1418 {
1419 uint64_t r;
1420
1421 #if ECB_STDFP
1422 memcpy (&r, &x, 8);
1423 #else
1424 /* slow emulation, works for anything but -0 */
1425 uint64_t m;
1426 int e;
1427
1428 if (x == 0e0 ) return 0x0000000000000000U;
1429 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1430 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1431 if (x != x ) return 0X7ff7ffffffffffffU;
1432
1433 m = frexp (x, &e) * 0x20000000000000U;
1434
1435 r = m & 0x8000000000000000;;
1436
1437 if (r)
1438 m = -m;
1439
1440 if (e <= -1022)
1441 {
1442 m &= 0x1fffffffffffffU;
1443 m >>= (-1021 - e);
1444 e = -1022;
1445 }
1446
1447 r |= ((uint64_t)(e + 1022)) << 52;
1448 r |= m & 0xfffffffffffffU;
1449 #endif
1450
1451 return r;
1452 }
1453
1454 /* converts an ieee double/binary64 to a double */
1455 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1456 ecb_function_ ecb_const double
1457 ecb_binary64_to_double (uint64_t x)
1458 {
1459 double r;
1460
1461 #if ECB_STDFP
1462 memcpy (&r, &x, 8);
1463 #else
1464 /* emulation, only works for normals and subnormals and +0 */
1465 int neg = x >> 63;
1466 int e = (x >> 52) & 0x7ffU;
1467
1468 x &= 0xfffffffffffffU;
1469
1470 if (e)
1471 x |= 0x10000000000000U;
1472 else
1473 e = 1;
1474
1475 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1476 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1477
1478 r = neg ? -r : r;
1479 #endif
1480
1481 return r;
1482 }
1483
1484 /* convert a float to ieee half/binary16 */
1485 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1486 ecb_function_ ecb_const uint16_t
1487 ecb_float_to_binary16 (float x)
1488 {
1489 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1490 }
1491
1492 /* convert an ieee half/binary16 to float */
1493 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1494 ecb_function_ ecb_const float
1495 ecb_binary16_to_float (uint16_t x)
1496 {
1497 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1498 }
1499
1500#endif
1501
1502#endif
1503
1504/* ECB.H END */
1505
1506#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1507/* if your architecture doesn't need memory fences, e.g. because it is
1508 * single-cpu/core, or if you use libev in a project that doesn't use libev
1509 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1510 * libev, in which cases the memory fences become nops.
1511 * alternatively, you can remove this #error and link against libpthread,
1512 * which will then provide the memory fences.
1513 */
1514# error "memory fences not defined for your architecture, please report"
1515#endif
1516
1517#ifndef ECB_MEMORY_FENCE
1518# define ECB_MEMORY_FENCE do { } while (0)
1519# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1520# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1521#endif
1522
1523#define expect_false(cond) ecb_expect_false (cond)
1524#define expect_true(cond) ecb_expect_true (cond)
1525#define noinline ecb_noinline
1526
1527#define inline_size ecb_inline
1528
1529#if EV_FEATURE_CODE
1530# define inline_speed ecb_inline
1531#else
1532# define inline_speed noinline static
1533#endif
1534
1535#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1536
1537#if EV_MINPRI == EV_MAXPRI
1538# define ABSPRI(w) (((W)w), 0)
1539#else
1540# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1541#endif
1542
1543#define EMPTY /* required for microsofts broken pseudo-c compiler */
1544#define EMPTY2(a,b) /* used to suppress some warnings */
1545
1546typedef ev_watcher *W;
1547typedef ev_watcher_list *WL;
1548typedef ev_watcher_time *WT;
1549
1550#define ev_active(w) ((W)(w))->active
1551#define ev_at(w) ((WT)(w))->at
1552
1553#if EV_USE_REALTIME
1554/* sig_atomic_t is used to avoid per-thread variables or locking but still */
1555/* giving it a reasonably high chance of working on typical architectures */
1556static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1557#endif
1558
1559#if EV_USE_MONOTONIC
1560static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1561#endif
1562
1563#ifndef EV_FD_TO_WIN32_HANDLE
1564# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1565#endif
1566#ifndef EV_WIN32_HANDLE_TO_FD
1567# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1568#endif
1569#ifndef EV_WIN32_CLOSE_FD
1570# define EV_WIN32_CLOSE_FD(fd) close (fd)
1571#endif
1572
1573#ifdef _WIN32
25#include "ev.h" 1574# include "ev_win32.c"
1575#endif
26 1576
27struct ev_watcher { 1577/*****************************************************************************/
28 EV_WATCHER (ev_watcher);
29};
30 1578
31struct ev_watcher_list { 1579/* define a suitable floor function (only used by periodics atm) */
32 EV_WATCHER_LIST (ev_watcher_list);
33};
34 1580
35static ev_tstamp now, diff; /* monotonic clock */ 1581#if EV_USE_FLOOR
1582# include <math.h>
1583# define ev_floor(v) floor (v)
1584#else
1585
1586#include <float.h>
1587
1588/* a floor() replacement function, should be independent of ev_tstamp type */
1589noinline
1590static ev_tstamp
1591ev_floor (ev_tstamp v)
1592{
1593 /* the choice of shift factor is not terribly important */
1594#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1595 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1596#else
1597 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1598#endif
1599
1600 /* argument too large for an unsigned long? */
1601 if (expect_false (v >= shift))
1602 {
1603 ev_tstamp f;
1604
1605 if (v == v - 1.)
1606 return v; /* very large number */
1607
1608 f = shift * ev_floor (v * (1. / shift));
1609 return f + ev_floor (v - f);
1610 }
1611
1612 /* special treatment for negative args? */
1613 if (expect_false (v < 0.))
1614 {
1615 ev_tstamp f = -ev_floor (-v);
1616
1617 return f - (f == v ? 0 : 1);
1618 }
1619
1620 /* fits into an unsigned long */
1621 return (unsigned long)v;
1622}
1623
1624#endif
1625
1626/*****************************************************************************/
1627
1628#ifdef __linux
1629# include <sys/utsname.h>
1630#endif
1631
1632noinline ecb_cold
1633static unsigned int
1634ev_linux_version (void)
1635{
1636#ifdef __linux
1637 unsigned int v = 0;
1638 struct utsname buf;
1639 int i;
1640 char *p = buf.release;
1641
1642 if (uname (&buf))
1643 return 0;
1644
1645 for (i = 3+1; --i; )
1646 {
1647 unsigned int c = 0;
1648
1649 for (;;)
1650 {
1651 if (*p >= '0' && *p <= '9')
1652 c = c * 10 + *p++ - '0';
1653 else
1654 {
1655 p += *p == '.';
1656 break;
1657 }
1658 }
1659
1660 v = (v << 8) | c;
1661 }
1662
1663 return v;
1664#else
1665 return 0;
1666#endif
1667}
1668
1669/*****************************************************************************/
1670
1671#if EV_AVOID_STDIO
1672noinline ecb_cold
1673static void
1674ev_printerr (const char *msg)
1675{
1676 write (STDERR_FILENO, msg, strlen (msg));
1677}
1678#endif
1679
1680static void (*syserr_cb)(const char *msg) EV_THROW;
1681
1682ecb_cold
1683void
1684ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
1685{
1686 syserr_cb = cb;
1687}
1688
1689noinline ecb_cold
1690static void
1691ev_syserr (const char *msg)
1692{
1693 if (!msg)
1694 msg = "(libev) system error";
1695
1696 if (syserr_cb)
1697 syserr_cb (msg);
1698 else
1699 {
1700#if EV_AVOID_STDIO
1701 ev_printerr (msg);
1702 ev_printerr (": ");
1703 ev_printerr (strerror (errno));
1704 ev_printerr ("\n");
1705#else
1706 perror (msg);
1707#endif
1708 abort ();
1709 }
1710}
1711
1712static void *
1713ev_realloc_emul (void *ptr, long size) EV_THROW
1714{
1715 /* some systems, notably openbsd and darwin, fail to properly
1716 * implement realloc (x, 0) (as required by both ansi c-89 and
1717 * the single unix specification, so work around them here.
1718 * recently, also (at least) fedora and debian started breaking it,
1719 * despite documenting it otherwise.
1720 */
1721
1722 if (size)
1723 return realloc (ptr, size);
1724
1725 free (ptr);
1726 return 0;
1727}
1728
1729static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
1730
1731ecb_cold
1732void
1733ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
1734{
1735 alloc = cb;
1736}
1737
1738inline_speed void *
1739ev_realloc (void *ptr, long size)
1740{
1741 ptr = alloc (ptr, size);
1742
1743 if (!ptr && size)
1744 {
1745#if EV_AVOID_STDIO
1746 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1747#else
1748 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1749#endif
1750 abort ();
1751 }
1752
1753 return ptr;
1754}
1755
1756#define ev_malloc(size) ev_realloc (0, (size))
1757#define ev_free(ptr) ev_realloc ((ptr), 0)
1758
1759/*****************************************************************************/
1760
1761/* set in reify when reification needed */
1762#define EV_ANFD_REIFY 1
1763
1764/* file descriptor info structure */
1765typedef struct
1766{
1767 WL head;
1768 unsigned char events; /* the events watched for */
1769 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1770 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
1771 unsigned char unused;
1772#if EV_USE_EPOLL
1773 unsigned int egen; /* generation counter to counter epoll bugs */
1774#endif
1775#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1776 SOCKET handle;
1777#endif
1778#if EV_USE_IOCP
1779 OVERLAPPED or, ow;
1780#endif
1781} ANFD;
1782
1783/* stores the pending event set for a given watcher */
1784typedef struct
1785{
1786 W w;
1787 int events; /* the pending event set for the given watcher */
1788} ANPENDING;
1789
1790#if EV_USE_INOTIFY
1791/* hash table entry per inotify-id */
1792typedef struct
1793{
1794 WL head;
1795} ANFS;
1796#endif
1797
1798/* Heap Entry */
1799#if EV_HEAP_CACHE_AT
1800 /* a heap element */
1801 typedef struct {
1802 ev_tstamp at;
1803 WT w;
1804 } ANHE;
1805
1806 #define ANHE_w(he) (he).w /* access watcher, read-write */
1807 #define ANHE_at(he) (he).at /* access cached at, read-only */
1808 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1809#else
1810 /* a heap element */
1811 typedef WT ANHE;
1812
1813 #define ANHE_w(he) (he)
1814 #define ANHE_at(he) (he)->at
1815 #define ANHE_at_cache(he)
1816#endif
1817
1818#if EV_MULTIPLICITY
1819
1820 struct ev_loop
1821 {
36ev_tstamp ev_now; 1822 ev_tstamp ev_rt_now;
37int ev_method; 1823 #define ev_rt_now ((loop)->ev_rt_now)
1824 #define VAR(name,decl) decl;
1825 #include "ev_vars.h"
1826 #undef VAR
1827 };
1828 #include "ev_wrap.h"
38 1829
39static int have_monotonic; /* runtime */ 1830 static struct ev_loop default_loop_struct;
1831 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
40 1832
41static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 1833#else
42static void (*method_modify)(int fd, int oev, int nev);
43static void (*method_poll)(ev_tstamp timeout);
44 1834
1835 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
1836 #define VAR(name,decl) static decl;
1837 #include "ev_vars.h"
1838 #undef VAR
1839
1840 static int ev_default_loop_ptr;
1841
1842#endif
1843
1844#if EV_FEATURE_API
1845# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1846# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1847# define EV_INVOKE_PENDING invoke_cb (EV_A)
1848#else
1849# define EV_RELEASE_CB (void)0
1850# define EV_ACQUIRE_CB (void)0
1851# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1852#endif
1853
1854#define EVBREAK_RECURSE 0x80
1855
1856/*****************************************************************************/
1857
1858#ifndef EV_HAVE_EV_TIME
45ev_tstamp 1859ev_tstamp
46ev_time (void) 1860ev_time (void) EV_THROW
47{ 1861{
48#if HAVE_REALTIME 1862#if EV_USE_REALTIME
1863 if (expect_true (have_realtime))
1864 {
49 struct timespec ts; 1865 struct timespec ts;
50 clock_gettime (CLOCK_REALTIME, &ts); 1866 clock_gettime (CLOCK_REALTIME, &ts);
51 return ts.tv_sec + ts.tv_nsec * 1e-9; 1867 return ts.tv_sec + ts.tv_nsec * 1e-9;
52#else 1868 }
1869#endif
1870
53 struct timeval tv; 1871 struct timeval tv;
54 gettimeofday (&tv, 0); 1872 gettimeofday (&tv, 0);
55 return tv.tv_sec + tv.tv_usec * 1e-6; 1873 return tv.tv_sec + tv.tv_usec * 1e-6;
56#endif
57} 1874}
1875#endif
58 1876
59static ev_tstamp 1877inline_size ev_tstamp
60get_clock (void) 1878get_clock (void)
61{ 1879{
62#if HAVE_MONOTONIC 1880#if EV_USE_MONOTONIC
63 if (have_monotonic) 1881 if (expect_true (have_monotonic))
64 { 1882 {
65 struct timespec ts; 1883 struct timespec ts;
66 clock_gettime (CLOCK_MONOTONIC, &ts); 1884 clock_gettime (CLOCK_MONOTONIC, &ts);
67 return ts.tv_sec + ts.tv_nsec * 1e-9; 1885 return ts.tv_sec + ts.tv_nsec * 1e-9;
68 } 1886 }
69#endif 1887#endif
70 1888
71 return ev_time (); 1889 return ev_time ();
72} 1890}
73 1891
1892#if EV_MULTIPLICITY
1893ev_tstamp
1894ev_now (EV_P) EV_THROW
1895{
1896 return ev_rt_now;
1897}
1898#endif
1899
1900void
1901ev_sleep (ev_tstamp delay) EV_THROW
1902{
1903 if (delay > 0.)
1904 {
1905#if EV_USE_NANOSLEEP
1906 struct timespec ts;
1907
1908 EV_TS_SET (ts, delay);
1909 nanosleep (&ts, 0);
1910#elif defined _WIN32
1911 Sleep ((unsigned long)(delay * 1e3));
1912#else
1913 struct timeval tv;
1914
1915 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1916 /* something not guaranteed by newer posix versions, but guaranteed */
1917 /* by older ones */
1918 EV_TV_SET (tv, delay);
1919 select (0, 0, 0, 0, &tv);
1920#endif
1921 }
1922}
1923
1924/*****************************************************************************/
1925
1926#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1927
1928/* find a suitable new size for the given array, */
1929/* hopefully by rounding to a nice-to-malloc size */
1930inline_size int
1931array_nextsize (int elem, int cur, int cnt)
1932{
1933 int ncur = cur + 1;
1934
1935 do
1936 ncur <<= 1;
1937 while (cnt > ncur);
1938
1939 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
1940 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
1941 {
1942 ncur *= elem;
1943 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
1944 ncur = ncur - sizeof (void *) * 4;
1945 ncur /= elem;
1946 }
1947
1948 return ncur;
1949}
1950
1951noinline ecb_cold
1952static void *
1953array_realloc (int elem, void *base, int *cur, int cnt)
1954{
1955 *cur = array_nextsize (elem, *cur, cnt);
1956 return ev_realloc (base, elem * *cur);
1957}
1958
1959#define array_init_zero(base,count) \
1960 memset ((void *)(base), 0, sizeof (*(base)) * (count))
1961
74#define array_needsize(base,cur,cnt,init) \ 1962#define array_needsize(type,base,cur,cnt,init) \
75 if ((cnt) > cur) \ 1963 if (expect_false ((cnt) > (cur))) \
76 { \ 1964 { \
77 int newcnt = cur ? cur << 1 : 16; \ 1965 ecb_unused int ocur_ = (cur); \
78 fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\ 1966 (base) = (type *)array_realloc \
79 base = realloc (base, sizeof (*base) * (newcnt)); \ 1967 (sizeof (type), (base), &(cur), (cnt)); \
80 init (base + cur, newcnt - cur); \ 1968 init ((base) + (ocur_), (cur) - ocur_); \
81 cur = newcnt; \
82 } 1969 }
83 1970
84typedef struct 1971#if 0
85{ 1972#define array_slim(type,stem) \
86 struct ev_io *head; 1973 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
87 unsigned char wev, rev; /* want, received event set */ 1974 { \
88} ANFD; 1975 stem ## max = array_roundsize (stem ## cnt >> 1); \
1976 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
1977 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
1978 }
1979#endif
89 1980
90static ANFD *anfds; 1981#define array_free(stem, idx) \
91static int anfdmax; 1982 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
92 1983
93static int *fdchanges; 1984/*****************************************************************************/
94static int fdchangemax, fdchangecnt;
95 1985
1986/* dummy callback for pending events */
1987noinline
96static void 1988static void
97anfds_init (ANFD *base, int count) 1989pendingcb (EV_P_ ev_prepare *w, int revents)
98{ 1990{
99 while (count--)
100 {
101 base->head = 0;
102 base->wev = base->rev = EV_NONE;
103 ++base;
104 }
105} 1991}
106 1992
107typedef struct 1993noinline
1994void
1995ev_feed_event (EV_P_ void *w, int revents) EV_THROW
108{ 1996{
109 struct ev_watcher *w; 1997 W w_ = (W)w;
110 int events; 1998 int pri = ABSPRI (w_);
111} ANPENDING;
112 1999
113static ANPENDING *pendings; 2000 if (expect_false (w_->pending))
114static int pendingmax, pendingcnt;
115
116static void
117event (struct ev_watcher *w, int events)
118{
119 w->pending = ++pendingcnt;
120 array_needsize (pendings, pendingmax, pendingcnt, );
121 pendings [pendingcnt - 1].w = w;
122 pendings [pendingcnt - 1].events = events; 2001 pendings [pri][w_->pending - 1].events |= revents;
123} 2002 else
2003 {
2004 w_->pending = ++pendingcnt [pri];
2005 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
2006 pendings [pri][w_->pending - 1].w = w_;
2007 pendings [pri][w_->pending - 1].events = revents;
2008 }
124 2009
125static void 2010 pendingpri = NUMPRI - 1;
2011}
2012
2013inline_speed void
2014feed_reverse (EV_P_ W w)
2015{
2016 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
2017 rfeeds [rfeedcnt++] = w;
2018}
2019
2020inline_size void
2021feed_reverse_done (EV_P_ int revents)
2022{
2023 do
2024 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
2025 while (rfeedcnt);
2026}
2027
2028inline_speed void
2029queue_events (EV_P_ W *events, int eventcnt, int type)
2030{
2031 int i;
2032
2033 for (i = 0; i < eventcnt; ++i)
2034 ev_feed_event (EV_A_ events [i], type);
2035}
2036
2037/*****************************************************************************/
2038
2039inline_speed void
126fd_event (int fd, int events) 2040fd_event_nocheck (EV_P_ int fd, int revents)
127{ 2041{
128 ANFD *anfd = anfds + fd; 2042 ANFD *anfd = anfds + fd;
129 struct ev_io *w; 2043 ev_io *w;
130 2044
131 for (w = anfd->head; w; w = w->next) 2045 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
132 { 2046 {
133 int ev = w->events & events; 2047 int ev = w->events & revents;
134 2048
135 if (ev) 2049 if (ev)
136 event ((struct ev_watcher *)w, ev); 2050 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 } 2051 }
240} 2052}
241 2053
242static void 2054/* do not submit kernel events for fds that have reify set */
243siginit (void) 2055/* because that means they changed while we were polling for new events */
2056inline_speed void
2057fd_event (EV_P_ int fd, int revents)
244{ 2058{
245 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC); 2059 ANFD *anfd = anfds + fd;
246 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
247 2060
248 /* rather than sort out wether we really need nb, set it */ 2061 if (expect_true (!anfd->reify))
249 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK); 2062 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} 2063}
255 2064
256#if HAVE_EPOLL 2065void
257# include "ev_epoll.c" 2066ev_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{ 2067{
265#if HAVE_MONOTONIC 2068 if (fd >= 0 && fd < anfdmax)
266 { 2069 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} 2070}
296 2071
297void ev_prefork (void) 2072/* make sure the external fd watch events are in-sync */
298{ 2073/* with the kernel/libev internal state */
299} 2074inline_size void
300 2075fd_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{ 2076{
322 int i; 2077 int i;
323 2078
2079#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
324 for (i = 0; i < fdchangecnt; ++i) 2080 for (i = 0; i < fdchangecnt; ++i)
325 { 2081 {
326 int fd = fdchanges [i]; 2082 int fd = fdchanges [i];
327 ANFD *anfd = anfds + fd; 2083 ANFD *anfd = anfds + fd;
328 struct ev_io *w;
329 2084
330 int wev = 0; 2085 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 { 2086 {
337 method_modify (fd, anfd->wev, wev); 2087 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2088
2089 if (handle != anfd->handle)
2090 {
2091 unsigned long arg;
2092
2093 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2094
2095 /* handle changed, but fd didn't - we need to do it in two steps */
2096 backend_modify (EV_A_ fd, anfd->events, 0);
338 anfd->wev = wev; 2097 anfd->events = 0;
2098 anfd->handle = handle;
2099 }
339 } 2100 }
340 } 2101 }
2102#endif
2103
2104 for (i = 0; i < fdchangecnt; ++i)
2105 {
2106 int fd = fdchanges [i];
2107 ANFD *anfd = anfds + fd;
2108 ev_io *w;
2109
2110 unsigned char o_events = anfd->events;
2111 unsigned char o_reify = anfd->reify;
2112
2113 anfd->reify = 0;
2114
2115 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
2116 {
2117 anfd->events = 0;
2118
2119 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
2120 anfd->events |= (unsigned char)w->events;
2121
2122 if (o_events != anfd->events)
2123 o_reify = EV__IOFDSET; /* actually |= */
2124 }
2125
2126 if (o_reify & EV__IOFDSET)
2127 backend_modify (EV_A_ fd, o_events, anfd->events);
2128 }
341 2129
342 fdchangecnt = 0; 2130 fdchangecnt = 0;
343} 2131}
344 2132
2133/* something about the given fd changed */
2134inline_size
2135void
2136fd_change (EV_P_ int fd, int flags)
2137{
2138 unsigned char reify = anfds [fd].reify;
2139 anfds [fd].reify |= flags;
2140
2141 if (expect_true (!reify))
2142 {
2143 ++fdchangecnt;
2144 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
2145 fdchanges [fdchangecnt - 1] = fd;
2146 }
2147}
2148
2149/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
2150inline_speed ecb_cold void
2151fd_kill (EV_P_ int fd)
2152{
2153 ev_io *w;
2154
2155 while ((w = (ev_io *)anfds [fd].head))
2156 {
2157 ev_io_stop (EV_A_ w);
2158 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
2159 }
2160}
2161
2162/* check whether the given fd is actually valid, for error recovery */
2163inline_size ecb_cold int
2164fd_valid (int fd)
2165{
2166#ifdef _WIN32
2167 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
2168#else
2169 return fcntl (fd, F_GETFD) != -1;
2170#endif
2171}
2172
2173/* called on EBADF to verify fds */
2174noinline ecb_cold
345static void 2175static void
346call_pending () 2176fd_ebadf (EV_P)
2177{
2178 int fd;
2179
2180 for (fd = 0; fd < anfdmax; ++fd)
2181 if (anfds [fd].events)
2182 if (!fd_valid (fd) && errno == EBADF)
2183 fd_kill (EV_A_ fd);
2184}
2185
2186/* called on ENOMEM in select/poll to kill some fds and retry */
2187noinline ecb_cold
2188static void
2189fd_enomem (EV_P)
2190{
2191 int fd;
2192
2193 for (fd = anfdmax; fd--; )
2194 if (anfds [fd].events)
2195 {
2196 fd_kill (EV_A_ fd);
2197 break;
2198 }
2199}
2200
2201/* usually called after fork if backend needs to re-arm all fds from scratch */
2202noinline
2203static void
2204fd_rearm_all (EV_P)
2205{
2206 int fd;
2207
2208 for (fd = 0; fd < anfdmax; ++fd)
2209 if (anfds [fd].events)
2210 {
2211 anfds [fd].events = 0;
2212 anfds [fd].emask = 0;
2213 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
2214 }
2215}
2216
2217/* used to prepare libev internal fd's */
2218/* this is not fork-safe */
2219inline_speed void
2220fd_intern (int fd)
2221{
2222#ifdef _WIN32
2223 unsigned long arg = 1;
2224 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
2225#else
2226 fcntl (fd, F_SETFD, FD_CLOEXEC);
2227 fcntl (fd, F_SETFL, O_NONBLOCK);
2228#endif
2229}
2230
2231/*****************************************************************************/
2232
2233/*
2234 * the heap functions want a real array index. array index 0 is guaranteed to not
2235 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
2236 * the branching factor of the d-tree.
2237 */
2238
2239/*
2240 * at the moment we allow libev the luxury of two heaps,
2241 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
2242 * which is more cache-efficient.
2243 * the difference is about 5% with 50000+ watchers.
2244 */
2245#if EV_USE_4HEAP
2246
2247#define DHEAP 4
2248#define HEAP0 (DHEAP - 1) /* index of first element in heap */
2249#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
2250#define UPHEAP_DONE(p,k) ((p) == (k))
2251
2252/* away from the root */
2253inline_speed void
2254downheap (ANHE *heap, int N, int k)
2255{
2256 ANHE he = heap [k];
2257 ANHE *E = heap + N + HEAP0;
2258
2259 for (;;)
2260 {
2261 ev_tstamp minat;
2262 ANHE *minpos;
2263 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
2264
2265 /* find minimum child */
2266 if (expect_true (pos + DHEAP - 1 < E))
2267 {
2268 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2269 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2270 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2271 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2272 }
2273 else if (pos < E)
2274 {
2275 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2276 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2277 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2278 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2279 }
2280 else
2281 break;
2282
2283 if (ANHE_at (he) <= minat)
2284 break;
2285
2286 heap [k] = *minpos;
2287 ev_active (ANHE_w (*minpos)) = k;
2288
2289 k = minpos - heap;
2290 }
2291
2292 heap [k] = he;
2293 ev_active (ANHE_w (he)) = k;
2294}
2295
2296#else /* 4HEAP */
2297
2298#define HEAP0 1
2299#define HPARENT(k) ((k) >> 1)
2300#define UPHEAP_DONE(p,k) (!(p))
2301
2302/* away from the root */
2303inline_speed void
2304downheap (ANHE *heap, int N, int k)
2305{
2306 ANHE he = heap [k];
2307
2308 for (;;)
2309 {
2310 int c = k << 1;
2311
2312 if (c >= N + HEAP0)
2313 break;
2314
2315 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
2316 ? 1 : 0;
2317
2318 if (ANHE_at (he) <= ANHE_at (heap [c]))
2319 break;
2320
2321 heap [k] = heap [c];
2322 ev_active (ANHE_w (heap [k])) = k;
2323
2324 k = c;
2325 }
2326
2327 heap [k] = he;
2328 ev_active (ANHE_w (he)) = k;
2329}
2330#endif
2331
2332/* towards the root */
2333inline_speed void
2334upheap (ANHE *heap, int k)
2335{
2336 ANHE he = heap [k];
2337
2338 for (;;)
2339 {
2340 int p = HPARENT (k);
2341
2342 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
2343 break;
2344
2345 heap [k] = heap [p];
2346 ev_active (ANHE_w (heap [k])) = k;
2347 k = p;
2348 }
2349
2350 heap [k] = he;
2351 ev_active (ANHE_w (he)) = k;
2352}
2353
2354/* move an element suitably so it is in a correct place */
2355inline_size void
2356adjustheap (ANHE *heap, int N, int k)
2357{
2358 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
2359 upheap (heap, k);
2360 else
2361 downheap (heap, N, k);
2362}
2363
2364/* rebuild the heap: this function is used only once and executed rarely */
2365inline_size void
2366reheap (ANHE *heap, int N)
347{ 2367{
348 int i; 2368 int i;
349 2369
2370 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
2371 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
350 for (i = 0; i < pendingcnt; ++i) 2372 for (i = 0; i < N; ++i)
351 { 2373 upheap (heap, i + HEAP0);
352 ANPENDING *p = pendings + i; 2374}
353 2375
354 if (p->w) 2376/*****************************************************************************/
2377
2378/* associate signal watchers to a signal signal */
2379typedef struct
2380{
2381 EV_ATOMIC_T pending;
2382#if EV_MULTIPLICITY
2383 EV_P;
2384#endif
2385 WL head;
2386} ANSIG;
2387
2388static ANSIG signals [EV_NSIG - 1];
2389
2390/*****************************************************************************/
2391
2392#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2393
2394noinline ecb_cold
2395static void
2396evpipe_init (EV_P)
2397{
2398 if (!ev_is_active (&pipe_w))
2399 {
2400 int fds [2];
2401
2402# if EV_USE_EVENTFD
2403 fds [0] = -1;
2404 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2405 if (fds [1] < 0 && errno == EINVAL)
2406 fds [1] = eventfd (0, 0);
2407
2408 if (fds [1] < 0)
2409# endif
355 { 2410 {
2411 while (pipe (fds))
2412 ev_syserr ("(libev) error creating signal/async pipe");
2413
2414 fd_intern (fds [0]);
2415 }
2416
2417 evpipe [0] = fds [0];
2418
2419 if (evpipe [1] < 0)
2420 evpipe [1] = fds [1]; /* first call, set write fd */
2421 else
2422 {
2423 /* on subsequent calls, do not change evpipe [1] */
2424 /* so that evpipe_write can always rely on its value. */
2425 /* this branch does not do anything sensible on windows, */
2426 /* so must not be executed on windows */
2427
2428 dup2 (fds [1], evpipe [1]);
2429 close (fds [1]);
2430 }
2431
2432 fd_intern (evpipe [1]);
2433
2434 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2435 ev_io_start (EV_A_ &pipe_w);
2436 ev_unref (EV_A); /* watcher should not keep loop alive */
2437 }
2438}
2439
2440inline_speed void
2441evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2442{
2443 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2444
2445 if (expect_true (*flag))
2446 return;
2447
2448 *flag = 1;
2449 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2450
2451 pipe_write_skipped = 1;
2452
2453 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2454
2455 if (pipe_write_wanted)
2456 {
2457 int old_errno;
2458
2459 pipe_write_skipped = 0;
2460 ECB_MEMORY_FENCE_RELEASE;
2461
2462 old_errno = errno; /* save errno because write will clobber it */
2463
2464#if EV_USE_EVENTFD
2465 if (evpipe [0] < 0)
2466 {
2467 uint64_t counter = 1;
2468 write (evpipe [1], &counter, sizeof (uint64_t));
2469 }
2470 else
2471#endif
2472 {
2473#ifdef _WIN32
2474 WSABUF buf;
2475 DWORD sent;
2476 buf.buf = &buf;
2477 buf.len = 1;
2478 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2479#else
2480 write (evpipe [1], &(evpipe [1]), 1);
2481#endif
2482 }
2483
2484 errno = old_errno;
2485 }
2486}
2487
2488/* called whenever the libev signal pipe */
2489/* got some events (signal, async) */
2490static void
2491pipecb (EV_P_ ev_io *iow, int revents)
2492{
2493 int i;
2494
2495 if (revents & EV_READ)
2496 {
2497#if EV_USE_EVENTFD
2498 if (evpipe [0] < 0)
2499 {
2500 uint64_t counter;
2501 read (evpipe [1], &counter, sizeof (uint64_t));
2502 }
2503 else
2504#endif
2505 {
2506 char dummy[4];
2507#ifdef _WIN32
2508 WSABUF buf;
2509 DWORD recvd;
2510 DWORD flags = 0;
2511 buf.buf = dummy;
2512 buf.len = sizeof (dummy);
2513 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2514#else
2515 read (evpipe [0], &dummy, sizeof (dummy));
2516#endif
2517 }
2518 }
2519
2520 pipe_write_skipped = 0;
2521
2522 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2523
2524#if EV_SIGNAL_ENABLE
2525 if (sig_pending)
2526 {
2527 sig_pending = 0;
2528
2529 ECB_MEMORY_FENCE;
2530
2531 for (i = EV_NSIG - 1; i--; )
2532 if (expect_false (signals [i].pending))
2533 ev_feed_signal_event (EV_A_ i + 1);
2534 }
2535#endif
2536
2537#if EV_ASYNC_ENABLE
2538 if (async_pending)
2539 {
2540 async_pending = 0;
2541
2542 ECB_MEMORY_FENCE;
2543
2544 for (i = asynccnt; i--; )
2545 if (asyncs [i]->sent)
2546 {
2547 asyncs [i]->sent = 0;
2548 ECB_MEMORY_FENCE_RELEASE;
2549 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
2550 }
2551 }
2552#endif
2553}
2554
2555/*****************************************************************************/
2556
2557void
2558ev_feed_signal (int signum) EV_THROW
2559{
2560#if EV_MULTIPLICITY
2561 EV_P;
2562 ECB_MEMORY_FENCE_ACQUIRE;
2563 EV_A = signals [signum - 1].loop;
2564
2565 if (!EV_A)
2566 return;
2567#endif
2568
2569 signals [signum - 1].pending = 1;
2570 evpipe_write (EV_A_ &sig_pending);
2571}
2572
2573static void
2574ev_sighandler (int signum)
2575{
2576#ifdef _WIN32
2577 signal (signum, ev_sighandler);
2578#endif
2579
2580 ev_feed_signal (signum);
2581}
2582
2583noinline
2584void
2585ev_feed_signal_event (EV_P_ int signum) EV_THROW
2586{
2587 WL w;
2588
2589 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2590 return;
2591
2592 --signum;
2593
2594#if EV_MULTIPLICITY
2595 /* it is permissible to try to feed a signal to the wrong loop */
2596 /* or, likely more useful, feeding a signal nobody is waiting for */
2597
2598 if (expect_false (signals [signum].loop != EV_A))
2599 return;
2600#endif
2601
2602 signals [signum].pending = 0;
2603 ECB_MEMORY_FENCE_RELEASE;
2604
2605 for (w = signals [signum].head; w; w = w->next)
2606 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2607}
2608
2609#if EV_USE_SIGNALFD
2610static void
2611sigfdcb (EV_P_ ev_io *iow, int revents)
2612{
2613 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2614
2615 for (;;)
2616 {
2617 ssize_t res = read (sigfd, si, sizeof (si));
2618
2619 /* not ISO-C, as res might be -1, but works with SuS */
2620 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2621 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2622
2623 if (res < (ssize_t)sizeof (si))
2624 break;
2625 }
2626}
2627#endif
2628
2629#endif
2630
2631/*****************************************************************************/
2632
2633#if EV_CHILD_ENABLE
2634static WL childs [EV_PID_HASHSIZE];
2635
2636static ev_signal childev;
2637
2638#ifndef WIFCONTINUED
2639# define WIFCONTINUED(status) 0
2640#endif
2641
2642/* handle a single child status event */
2643inline_speed void
2644child_reap (EV_P_ int chain, int pid, int status)
2645{
2646 ev_child *w;
2647 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
2648
2649 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2650 {
2651 if ((w->pid == pid || !w->pid)
2652 && (!traced || (w->flags & 1)))
2653 {
2654 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
2655 w->rpid = pid;
2656 w->rstatus = status;
2657 ev_feed_event (EV_A_ (W)w, EV_CHILD);
2658 }
2659 }
2660}
2661
2662#ifndef WCONTINUED
2663# define WCONTINUED 0
2664#endif
2665
2666/* called on sigchld etc., calls waitpid */
2667static void
2668childcb (EV_P_ ev_signal *sw, int revents)
2669{
2670 int pid, status;
2671
2672 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
2673 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
2674 if (!WCONTINUED
2675 || errno != EINVAL
2676 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
2677 return;
2678
2679 /* make sure we are called again until all children have been reaped */
2680 /* we need to do it this way so that the callback gets called before we continue */
2681 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
2682
2683 child_reap (EV_A_ pid, pid, status);
2684 if ((EV_PID_HASHSIZE) > 1)
2685 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
2686}
2687
2688#endif
2689
2690/*****************************************************************************/
2691
2692#if EV_USE_IOCP
2693# include "ev_iocp.c"
2694#endif
2695#if EV_USE_PORT
2696# include "ev_port.c"
2697#endif
2698#if EV_USE_KQUEUE
2699# include "ev_kqueue.c"
2700#endif
2701#if EV_USE_EPOLL
2702# include "ev_epoll.c"
2703#endif
2704#if EV_USE_POLL
2705# include "ev_poll.c"
2706#endif
2707#if EV_USE_SELECT
2708# include "ev_select.c"
2709#endif
2710
2711ecb_cold int
2712ev_version_major (void) EV_THROW
2713{
2714 return EV_VERSION_MAJOR;
2715}
2716
2717ecb_cold int
2718ev_version_minor (void) EV_THROW
2719{
2720 return EV_VERSION_MINOR;
2721}
2722
2723/* return true if we are running with elevated privileges and should ignore env variables */
2724inline_size ecb_cold int
2725enable_secure (void)
2726{
2727#ifdef _WIN32
2728 return 0;
2729#else
2730 return getuid () != geteuid ()
2731 || getgid () != getegid ();
2732#endif
2733}
2734
2735ecb_cold
2736unsigned int
2737ev_supported_backends (void) EV_THROW
2738{
2739 unsigned int flags = 0;
2740
2741 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2742 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
2743 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2744 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2745 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2746
2747 return flags;
2748}
2749
2750ecb_cold
2751unsigned int
2752ev_recommended_backends (void) EV_THROW
2753{
2754 unsigned int flags = ev_supported_backends ();
2755
2756#ifndef __NetBSD__
2757 /* kqueue is borked on everything but netbsd apparently */
2758 /* it usually doesn't work correctly on anything but sockets and pipes */
2759 flags &= ~EVBACKEND_KQUEUE;
2760#endif
2761#ifdef __APPLE__
2762 /* only select works correctly on that "unix-certified" platform */
2763 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2764 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2765#endif
2766#ifdef __FreeBSD__
2767 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2768#endif
2769
2770 return flags;
2771}
2772
2773ecb_cold
2774unsigned int
2775ev_embeddable_backends (void) EV_THROW
2776{
2777 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2778
2779 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2780 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2781 flags &= ~EVBACKEND_EPOLL;
2782
2783 return flags;
2784}
2785
2786unsigned int
2787ev_backend (EV_P) EV_THROW
2788{
2789 return backend;
2790}
2791
2792#if EV_FEATURE_API
2793unsigned int
2794ev_iteration (EV_P) EV_THROW
2795{
2796 return loop_count;
2797}
2798
2799unsigned int
2800ev_depth (EV_P) EV_THROW
2801{
2802 return loop_depth;
2803}
2804
2805void
2806ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2807{
2808 io_blocktime = interval;
2809}
2810
2811void
2812ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2813{
2814 timeout_blocktime = interval;
2815}
2816
2817void
2818ev_set_userdata (EV_P_ void *data) EV_THROW
2819{
2820 userdata = data;
2821}
2822
2823void *
2824ev_userdata (EV_P) EV_THROW
2825{
2826 return userdata;
2827}
2828
2829void
2830ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
2831{
2832 invoke_cb = invoke_pending_cb;
2833}
2834
2835void
2836ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2837{
2838 release_cb = release;
2839 acquire_cb = acquire;
2840}
2841#endif
2842
2843/* initialise a loop structure, must be zero-initialised */
2844noinline ecb_cold
2845static void
2846loop_init (EV_P_ unsigned int flags) EV_THROW
2847{
2848 if (!backend)
2849 {
2850 origflags = flags;
2851
2852#if EV_USE_REALTIME
2853 if (!have_realtime)
2854 {
2855 struct timespec ts;
2856
2857 if (!clock_gettime (CLOCK_REALTIME, &ts))
2858 have_realtime = 1;
2859 }
2860#endif
2861
2862#if EV_USE_MONOTONIC
2863 if (!have_monotonic)
2864 {
2865 struct timespec ts;
2866
2867 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
2868 have_monotonic = 1;
2869 }
2870#endif
2871
2872 /* pid check not overridable via env */
2873#ifndef _WIN32
2874 if (flags & EVFLAG_FORKCHECK)
2875 curpid = getpid ();
2876#endif
2877
2878 if (!(flags & EVFLAG_NOENV)
2879 && !enable_secure ()
2880 && getenv ("LIBEV_FLAGS"))
2881 flags = atoi (getenv ("LIBEV_FLAGS"));
2882
2883 ev_rt_now = ev_time ();
2884 mn_now = get_clock ();
2885 now_floor = mn_now;
2886 rtmn_diff = ev_rt_now - mn_now;
2887#if EV_FEATURE_API
2888 invoke_cb = ev_invoke_pending;
2889#endif
2890
2891 io_blocktime = 0.;
2892 timeout_blocktime = 0.;
2893 backend = 0;
2894 backend_fd = -1;
2895 sig_pending = 0;
2896#if EV_ASYNC_ENABLE
2897 async_pending = 0;
2898#endif
2899 pipe_write_skipped = 0;
2900 pipe_write_wanted = 0;
2901 evpipe [0] = -1;
2902 evpipe [1] = -1;
2903#if EV_USE_INOTIFY
2904 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2905#endif
2906#if EV_USE_SIGNALFD
2907 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2908#endif
2909
2910 if (!(flags & EVBACKEND_MASK))
2911 flags |= ev_recommended_backends ();
2912
2913#if EV_USE_IOCP
2914 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2915#endif
2916#if EV_USE_PORT
2917 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
2918#endif
2919#if EV_USE_KQUEUE
2920 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
2921#endif
2922#if EV_USE_EPOLL
2923 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
2924#endif
2925#if EV_USE_POLL
2926 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
2927#endif
2928#if EV_USE_SELECT
2929 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
2930#endif
2931
2932 ev_prepare_init (&pending_w, pendingcb);
2933
2934#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2935 ev_init (&pipe_w, pipecb);
2936 ev_set_priority (&pipe_w, EV_MAXPRI);
2937#endif
2938 }
2939}
2940
2941/* free up a loop structure */
2942ecb_cold
2943void
2944ev_loop_destroy (EV_P)
2945{
2946 int i;
2947
2948#if EV_MULTIPLICITY
2949 /* mimic free (0) */
2950 if (!EV_A)
2951 return;
2952#endif
2953
2954#if EV_CLEANUP_ENABLE
2955 /* queue cleanup watchers (and execute them) */
2956 if (expect_false (cleanupcnt))
2957 {
2958 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2959 EV_INVOKE_PENDING;
2960 }
2961#endif
2962
2963#if EV_CHILD_ENABLE
2964 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2965 {
2966 ev_ref (EV_A); /* child watcher */
2967 ev_signal_stop (EV_A_ &childev);
2968 }
2969#endif
2970
2971 if (ev_is_active (&pipe_w))
2972 {
2973 /*ev_ref (EV_A);*/
2974 /*ev_io_stop (EV_A_ &pipe_w);*/
2975
2976 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2977 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2978 }
2979
2980#if EV_USE_SIGNALFD
2981 if (ev_is_active (&sigfd_w))
2982 close (sigfd);
2983#endif
2984
2985#if EV_USE_INOTIFY
2986 if (fs_fd >= 0)
2987 close (fs_fd);
2988#endif
2989
2990 if (backend_fd >= 0)
2991 close (backend_fd);
2992
2993#if EV_USE_IOCP
2994 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2995#endif
2996#if EV_USE_PORT
2997 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
2998#endif
2999#if EV_USE_KQUEUE
3000 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
3001#endif
3002#if EV_USE_EPOLL
3003 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
3004#endif
3005#if EV_USE_POLL
3006 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
3007#endif
3008#if EV_USE_SELECT
3009 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
3010#endif
3011
3012 for (i = NUMPRI; i--; )
3013 {
3014 array_free (pending, [i]);
3015#if EV_IDLE_ENABLE
3016 array_free (idle, [i]);
3017#endif
3018 }
3019
3020 ev_free (anfds); anfds = 0; anfdmax = 0;
3021
3022 /* have to use the microsoft-never-gets-it-right macro */
3023 array_free (rfeed, EMPTY);
3024 array_free (fdchange, EMPTY);
3025 array_free (timer, EMPTY);
3026#if EV_PERIODIC_ENABLE
3027 array_free (periodic, EMPTY);
3028#endif
3029#if EV_FORK_ENABLE
3030 array_free (fork, EMPTY);
3031#endif
3032#if EV_CLEANUP_ENABLE
3033 array_free (cleanup, EMPTY);
3034#endif
3035 array_free (prepare, EMPTY);
3036 array_free (check, EMPTY);
3037#if EV_ASYNC_ENABLE
3038 array_free (async, EMPTY);
3039#endif
3040
3041 backend = 0;
3042
3043#if EV_MULTIPLICITY
3044 if (ev_is_default_loop (EV_A))
3045#endif
3046 ev_default_loop_ptr = 0;
3047#if EV_MULTIPLICITY
3048 else
3049 ev_free (EV_A);
3050#endif
3051}
3052
3053#if EV_USE_INOTIFY
3054inline_size void infy_fork (EV_P);
3055#endif
3056
3057inline_size void
3058loop_fork (EV_P)
3059{
3060#if EV_USE_PORT
3061 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
3062#endif
3063#if EV_USE_KQUEUE
3064 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
3065#endif
3066#if EV_USE_EPOLL
3067 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
3068#endif
3069#if EV_USE_INOTIFY
3070 infy_fork (EV_A);
3071#endif
3072
3073#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
3074 if (ev_is_active (&pipe_w) && postfork != 2)
3075 {
3076 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
3077
3078 ev_ref (EV_A);
3079 ev_io_stop (EV_A_ &pipe_w);
3080
3081 if (evpipe [0] >= 0)
3082 EV_WIN32_CLOSE_FD (evpipe [0]);
3083
3084 evpipe_init (EV_A);
3085 /* iterate over everything, in case we missed something before */
3086 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3087 }
3088#endif
3089
3090 postfork = 0;
3091}
3092
3093#if EV_MULTIPLICITY
3094
3095ecb_cold
3096struct ev_loop *
3097ev_loop_new (unsigned int flags) EV_THROW
3098{
3099 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
3100
3101 memset (EV_A, 0, sizeof (struct ev_loop));
3102 loop_init (EV_A_ flags);
3103
3104 if (ev_backend (EV_A))
3105 return EV_A;
3106
3107 ev_free (EV_A);
3108 return 0;
3109}
3110
3111#endif /* multiplicity */
3112
3113#if EV_VERIFY
3114noinline ecb_cold
3115static void
3116verify_watcher (EV_P_ W w)
3117{
3118 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
3119
3120 if (w->pending)
3121 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
3122}
3123
3124noinline ecb_cold
3125static void
3126verify_heap (EV_P_ ANHE *heap, int N)
3127{
3128 int i;
3129
3130 for (i = HEAP0; i < N + HEAP0; ++i)
3131 {
3132 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
3133 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
3134 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
3135
3136 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
3137 }
3138}
3139
3140noinline ecb_cold
3141static void
3142array_verify (EV_P_ W *ws, int cnt)
3143{
3144 while (cnt--)
3145 {
3146 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
3147 verify_watcher (EV_A_ ws [cnt]);
3148 }
3149}
3150#endif
3151
3152#if EV_FEATURE_API
3153void ecb_cold
3154ev_verify (EV_P) EV_THROW
3155{
3156#if EV_VERIFY
3157 int i;
3158 WL w, w2;
3159
3160 assert (activecnt >= -1);
3161
3162 assert (fdchangemax >= fdchangecnt);
3163 for (i = 0; i < fdchangecnt; ++i)
3164 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
3165
3166 assert (anfdmax >= 0);
3167 for (i = 0; i < anfdmax; ++i)
3168 {
3169 int j = 0;
3170
3171 for (w = w2 = anfds [i].head; w; w = w->next)
3172 {
3173 verify_watcher (EV_A_ (W)w);
3174
3175 if (j++ & 1)
3176 {
3177 assert (("libev: io watcher list contains a loop", w != w2));
3178 w2 = w2->next;
3179 }
3180
3181 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
3182 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
3183 }
3184 }
3185
3186 assert (timermax >= timercnt);
3187 verify_heap (EV_A_ timers, timercnt);
3188
3189#if EV_PERIODIC_ENABLE
3190 assert (periodicmax >= periodiccnt);
3191 verify_heap (EV_A_ periodics, periodiccnt);
3192#endif
3193
3194 for (i = NUMPRI; i--; )
3195 {
3196 assert (pendingmax [i] >= pendingcnt [i]);
3197#if EV_IDLE_ENABLE
3198 assert (idleall >= 0);
3199 assert (idlemax [i] >= idlecnt [i]);
3200 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
3201#endif
3202 }
3203
3204#if EV_FORK_ENABLE
3205 assert (forkmax >= forkcnt);
3206 array_verify (EV_A_ (W *)forks, forkcnt);
3207#endif
3208
3209#if EV_CLEANUP_ENABLE
3210 assert (cleanupmax >= cleanupcnt);
3211 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3212#endif
3213
3214#if EV_ASYNC_ENABLE
3215 assert (asyncmax >= asynccnt);
3216 array_verify (EV_A_ (W *)asyncs, asynccnt);
3217#endif
3218
3219#if EV_PREPARE_ENABLE
3220 assert (preparemax >= preparecnt);
3221 array_verify (EV_A_ (W *)prepares, preparecnt);
3222#endif
3223
3224#if EV_CHECK_ENABLE
3225 assert (checkmax >= checkcnt);
3226 array_verify (EV_A_ (W *)checks, checkcnt);
3227#endif
3228
3229# if 0
3230#if EV_CHILD_ENABLE
3231 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
3232 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3233#endif
3234# endif
3235#endif
3236}
3237#endif
3238
3239#if EV_MULTIPLICITY
3240ecb_cold
3241struct ev_loop *
3242#else
3243int
3244#endif
3245ev_default_loop (unsigned int flags) EV_THROW
3246{
3247 if (!ev_default_loop_ptr)
3248 {
3249#if EV_MULTIPLICITY
3250 EV_P = ev_default_loop_ptr = &default_loop_struct;
3251#else
3252 ev_default_loop_ptr = 1;
3253#endif
3254
3255 loop_init (EV_A_ flags);
3256
3257 if (ev_backend (EV_A))
3258 {
3259#if EV_CHILD_ENABLE
3260 ev_signal_init (&childev, childcb, SIGCHLD);
3261 ev_set_priority (&childev, EV_MAXPRI);
3262 ev_signal_start (EV_A_ &childev);
3263 ev_unref (EV_A); /* child watcher should not keep loop alive */
3264#endif
3265 }
3266 else
3267 ev_default_loop_ptr = 0;
3268 }
3269
3270 return ev_default_loop_ptr;
3271}
3272
3273void
3274ev_loop_fork (EV_P) EV_THROW
3275{
3276 postfork = 1;
3277}
3278
3279/*****************************************************************************/
3280
3281void
3282ev_invoke (EV_P_ void *w, int revents)
3283{
3284 EV_CB_INVOKE ((W)w, revents);
3285}
3286
3287unsigned int
3288ev_pending_count (EV_P) EV_THROW
3289{
3290 int pri;
3291 unsigned int count = 0;
3292
3293 for (pri = NUMPRI; pri--; )
3294 count += pendingcnt [pri];
3295
3296 return count;
3297}
3298
3299noinline
3300void
3301ev_invoke_pending (EV_P)
3302{
3303 pendingpri = NUMPRI;
3304
3305 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3306 {
3307 --pendingpri;
3308
3309 while (pendingcnt [pendingpri])
3310 {
3311 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
3312
356 p->w->pending = 0; 3313 p->w->pending = 0;
357 p->w->cb (p->w, p->events); 3314 EV_CB_INVOKE (p->w, p->events);
3315 EV_FREQUENT_CHECK;
358 } 3316 }
359 } 3317 }
360
361 pendingcnt = 0;
362} 3318}
363 3319
3320#if EV_IDLE_ENABLE
3321/* make idle watchers pending. this handles the "call-idle */
3322/* only when higher priorities are idle" logic */
3323inline_size void
3324idle_reify (EV_P)
3325{
3326 if (expect_false (idleall))
3327 {
3328 int pri;
3329
3330 for (pri = NUMPRI; pri--; )
3331 {
3332 if (pendingcnt [pri])
3333 break;
3334
3335 if (idlecnt [pri])
3336 {
3337 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
3338 break;
3339 }
3340 }
3341 }
3342}
3343#endif
3344
3345/* make timers pending */
3346inline_size void
3347timers_reify (EV_P)
3348{
3349 EV_FREQUENT_CHECK;
3350
3351 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
3352 {
3353 do
3354 {
3355 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
3356
3357 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
3358
3359 /* first reschedule or stop timer */
3360 if (w->repeat)
3361 {
3362 ev_at (w) += w->repeat;
3363 if (ev_at (w) < mn_now)
3364 ev_at (w) = mn_now;
3365
3366 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
3367
3368 ANHE_at_cache (timers [HEAP0]);
3369 downheap (timers, timercnt, HEAP0);
3370 }
3371 else
3372 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
3373
3374 EV_FREQUENT_CHECK;
3375 feed_reverse (EV_A_ (W)w);
3376 }
3377 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
3378
3379 feed_reverse_done (EV_A_ EV_TIMER);
3380 }
3381}
3382
3383#if EV_PERIODIC_ENABLE
3384
3385noinline
364static void 3386static void
365timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now) 3387periodic_recalc (EV_P_ ev_periodic *w)
366{ 3388{
367 while (timercnt && timers [0]->at <= now) 3389 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3390 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3391
3392 /* the above almost always errs on the low side */
3393 while (at <= ev_rt_now)
3394 {
3395 ev_tstamp nat = at + w->interval;
3396
3397 /* when resolution fails us, we use ev_rt_now */
3398 if (expect_false (nat == at))
3399 {
3400 at = ev_rt_now;
3401 break;
3402 }
3403
3404 at = nat;
368 { 3405 }
369 struct ev_timer *w = timers [0];
370 3406
3407 ev_at (w) = at;
3408}
3409
3410/* make periodics pending */
3411inline_size void
3412periodics_reify (EV_P)
3413{
3414 EV_FREQUENT_CHECK;
3415
3416 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
3417 {
3418 do
3419 {
3420 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
3421
3422 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
3423
371 /* first reschedule or stop timer */ 3424 /* first reschedule or stop timer */
3425 if (w->reschedule_cb)
3426 {
3427 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3428
3429 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
3430
3431 ANHE_at_cache (periodics [HEAP0]);
3432 downheap (periodics, periodiccnt, HEAP0);
3433 }
3434 else if (w->interval)
3435 {
3436 periodic_recalc (EV_A_ w);
3437 ANHE_at_cache (periodics [HEAP0]);
3438 downheap (periodics, periodiccnt, HEAP0);
3439 }
3440 else
3441 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
3442
3443 EV_FREQUENT_CHECK;
3444 feed_reverse (EV_A_ (W)w);
3445 }
3446 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
3447
3448 feed_reverse_done (EV_A_ EV_PERIODIC);
3449 }
3450}
3451
3452/* simply recalculate all periodics */
3453/* TODO: maybe ensure that at least one event happens when jumping forward? */
3454noinline ecb_cold
3455static void
3456periodics_reschedule (EV_P)
3457{
3458 int i;
3459
3460 /* adjust periodics after time jump */
3461 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
3462 {
3463 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
3464
3465 if (w->reschedule_cb)
3466 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3467 else if (w->interval)
3468 periodic_recalc (EV_A_ w);
3469
3470 ANHE_at_cache (periodics [i]);
3471 }
3472
3473 reheap (periodics, periodiccnt);
3474}
3475#endif
3476
3477/* adjust all timers by a given offset */
3478noinline ecb_cold
3479static void
3480timers_reschedule (EV_P_ ev_tstamp adjust)
3481{
3482 int i;
3483
3484 for (i = 0; i < timercnt; ++i)
3485 {
3486 ANHE *he = timers + i + HEAP0;
3487 ANHE_w (*he)->at += adjust;
3488 ANHE_at_cache (*he);
3489 }
3490}
3491
3492/* fetch new monotonic and realtime times from the kernel */
3493/* also detect if there was a timejump, and act accordingly */
3494inline_speed void
3495time_update (EV_P_ ev_tstamp max_block)
3496{
3497#if EV_USE_MONOTONIC
3498 if (expect_true (have_monotonic))
3499 {
3500 int i;
3501 ev_tstamp odiff = rtmn_diff;
3502
3503 mn_now = get_clock ();
3504
3505 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
3506 /* interpolate in the meantime */
3507 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
3508 {
3509 ev_rt_now = rtmn_diff + mn_now;
3510 return;
3511 }
3512
3513 now_floor = mn_now;
3514 ev_rt_now = ev_time ();
3515
3516 /* loop a few times, before making important decisions.
3517 * on the choice of "4": one iteration isn't enough,
3518 * in case we get preempted during the calls to
3519 * ev_time and get_clock. a second call is almost guaranteed
3520 * to succeed in that case, though. and looping a few more times
3521 * doesn't hurt either as we only do this on time-jumps or
3522 * in the unlikely event of having been preempted here.
3523 */
3524 for (i = 4; --i; )
3525 {
3526 ev_tstamp diff;
3527 rtmn_diff = ev_rt_now - mn_now;
3528
3529 diff = odiff - rtmn_diff;
3530
3531 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
3532 return; /* all is well */
3533
3534 ev_rt_now = ev_time ();
3535 mn_now = get_clock ();
3536 now_floor = mn_now;
3537 }
3538
3539 /* no timer adjustment, as the monotonic clock doesn't jump */
3540 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
3541# if EV_PERIODIC_ENABLE
3542 periodics_reschedule (EV_A);
3543# endif
3544 }
3545 else
3546#endif
3547 {
3548 ev_rt_now = ev_time ();
3549
3550 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
3551 {
3552 /* adjust timers. this is easy, as the offset is the same for all of them */
3553 timers_reschedule (EV_A_ ev_rt_now - mn_now);
3554#if EV_PERIODIC_ENABLE
3555 periodics_reschedule (EV_A);
3556#endif
3557 }
3558
3559 mn_now = ev_rt_now;
3560 }
3561}
3562
3563int
3564ev_run (EV_P_ int flags)
3565{
3566#if EV_FEATURE_API
3567 ++loop_depth;
3568#endif
3569
3570 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3571
3572 loop_done = EVBREAK_CANCEL;
3573
3574 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
3575
3576 do
3577 {
3578#if EV_VERIFY >= 2
3579 ev_verify (EV_A);
3580#endif
3581
3582#ifndef _WIN32
3583 if (expect_false (curpid)) /* penalise the forking check even more */
3584 if (expect_false (getpid () != curpid))
3585 {
3586 curpid = getpid ();
3587 postfork = 1;
3588 }
3589#endif
3590
3591#if EV_FORK_ENABLE
3592 /* we might have forked, so queue fork handlers */
3593 if (expect_false (postfork))
3594 if (forkcnt)
3595 {
3596 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
3597 EV_INVOKE_PENDING;
3598 }
3599#endif
3600
3601#if EV_PREPARE_ENABLE
3602 /* queue prepare watchers (and execute them) */
3603 if (expect_false (preparecnt))
3604 {
3605 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
3606 EV_INVOKE_PENDING;
3607 }
3608#endif
3609
3610 if (expect_false (loop_done))
3611 break;
3612
3613 /* we might have forked, so reify kernel state if necessary */
3614 if (expect_false (postfork))
3615 loop_fork (EV_A);
3616
3617 /* update fd-related kernel structures */
3618 fd_reify (EV_A);
3619
3620 /* calculate blocking time */
3621 {
3622 ev_tstamp waittime = 0.;
3623 ev_tstamp sleeptime = 0.;
3624
3625 /* remember old timestamp for io_blocktime calculation */
3626 ev_tstamp prev_mn_now = mn_now;
3627
3628 /* update time to cancel out callback processing overhead */
3629 time_update (EV_A_ 1e100);
3630
3631 /* from now on, we want a pipe-wake-up */
3632 pipe_write_wanted = 1;
3633
3634 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3635
3636 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
3637 {
3638 waittime = MAX_BLOCKTIME;
3639
3640 if (timercnt)
3641 {
3642 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
3643 if (waittime > to) waittime = to;
3644 }
3645
3646#if EV_PERIODIC_ENABLE
3647 if (periodiccnt)
3648 {
3649 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
3650 if (waittime > to) waittime = to;
3651 }
3652#endif
3653
3654 /* don't let timeouts decrease the waittime below timeout_blocktime */
3655 if (expect_false (waittime < timeout_blocktime))
3656 waittime = timeout_blocktime;
3657
3658 /* at this point, we NEED to wait, so we have to ensure */
3659 /* to pass a minimum nonzero value to the backend */
3660 if (expect_false (waittime < backend_mintime))
3661 waittime = backend_mintime;
3662
3663 /* extra check because io_blocktime is commonly 0 */
3664 if (expect_false (io_blocktime))
3665 {
3666 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3667
3668 if (sleeptime > waittime - backend_mintime)
3669 sleeptime = waittime - backend_mintime;
3670
3671 if (expect_true (sleeptime > 0.))
3672 {
3673 ev_sleep (sleeptime);
3674 waittime -= sleeptime;
3675 }
3676 }
3677 }
3678
3679#if EV_FEATURE_API
3680 ++loop_count;
3681#endif
3682 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
3683 backend_poll (EV_A_ waittime);
3684 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3685
3686 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3687
3688 ECB_MEMORY_FENCE_ACQUIRE;
3689 if (pipe_write_skipped)
3690 {
3691 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3692 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3693 }
3694
3695
3696 /* update ev_rt_now, do magic */
3697 time_update (EV_A_ waittime + sleeptime);
3698 }
3699
3700 /* queue pending timers and reschedule them */
3701 timers_reify (EV_A); /* relative timers called last */
3702#if EV_PERIODIC_ENABLE
3703 periodics_reify (EV_A); /* absolute timers called first */
3704#endif
3705
3706#if EV_IDLE_ENABLE
3707 /* queue idle watchers unless other events are pending */
3708 idle_reify (EV_A);
3709#endif
3710
3711#if EV_CHECK_ENABLE
3712 /* queue check watchers, to be executed first */
3713 if (expect_false (checkcnt))
3714 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3715#endif
3716
3717 EV_INVOKE_PENDING;
3718 }
3719 while (expect_true (
3720 activecnt
3721 && !loop_done
3722 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3723 ));
3724
3725 if (loop_done == EVBREAK_ONE)
3726 loop_done = EVBREAK_CANCEL;
3727
3728#if EV_FEATURE_API
3729 --loop_depth;
3730#endif
3731
3732 return activecnt;
3733}
3734
3735void
3736ev_break (EV_P_ int how) EV_THROW
3737{
3738 loop_done = how;
3739}
3740
3741void
3742ev_ref (EV_P) EV_THROW
3743{
3744 ++activecnt;
3745}
3746
3747void
3748ev_unref (EV_P) EV_THROW
3749{
3750 --activecnt;
3751}
3752
3753void
3754ev_now_update (EV_P) EV_THROW
3755{
3756 time_update (EV_A_ 1e100);
3757}
3758
3759void
3760ev_suspend (EV_P) EV_THROW
3761{
3762 ev_now_update (EV_A);
3763}
3764
3765void
3766ev_resume (EV_P) EV_THROW
3767{
3768 ev_tstamp mn_prev = mn_now;
3769
3770 ev_now_update (EV_A);
3771 timers_reschedule (EV_A_ mn_now - mn_prev);
3772#if EV_PERIODIC_ENABLE
3773 /* TODO: really do this? */
3774 periodics_reschedule (EV_A);
3775#endif
3776}
3777
3778/*****************************************************************************/
3779/* singly-linked list management, used when the expected list length is short */
3780
3781inline_size void
3782wlist_add (WL *head, WL elem)
3783{
3784 elem->next = *head;
3785 *head = elem;
3786}
3787
3788inline_size void
3789wlist_del (WL *head, WL elem)
3790{
3791 while (*head)
3792 {
3793 if (expect_true (*head == elem))
3794 {
3795 *head = elem->next;
3796 break;
3797 }
3798
3799 head = &(*head)->next;
3800 }
3801}
3802
3803/* internal, faster, version of ev_clear_pending */
3804inline_speed void
3805clear_pending (EV_P_ W w)
3806{
3807 if (w->pending)
3808 {
3809 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
3810 w->pending = 0;
3811 }
3812}
3813
3814int
3815ev_clear_pending (EV_P_ void *w) EV_THROW
3816{
3817 W w_ = (W)w;
3818 int pending = w_->pending;
3819
3820 if (expect_true (pending))
3821 {
3822 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3823 p->w = (W)&pending_w;
3824 w_->pending = 0;
3825 return p->events;
3826 }
3827 else
3828 return 0;
3829}
3830
3831inline_size void
3832pri_adjust (EV_P_ W w)
3833{
3834 int pri = ev_priority (w);
3835 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3836 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3837 ev_set_priority (w, pri);
3838}
3839
3840inline_speed void
3841ev_start (EV_P_ W w, int active)
3842{
3843 pri_adjust (EV_A_ w);
3844 w->active = active;
3845 ev_ref (EV_A);
3846}
3847
3848inline_size void
3849ev_stop (EV_P_ W w)
3850{
3851 ev_unref (EV_A);
3852 w->active = 0;
3853}
3854
3855/*****************************************************************************/
3856
3857noinline
3858void
3859ev_io_start (EV_P_ ev_io *w) EV_THROW
3860{
3861 int fd = w->fd;
3862
3863 if (expect_false (ev_is_active (w)))
3864 return;
3865
3866 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3867 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3868
3869 EV_FREQUENT_CHECK;
3870
3871 ev_start (EV_A_ (W)w, 1);
3872 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
3873 wlist_add (&anfds[fd].head, (WL)w);
3874
3875 /* common bug, apparently */
3876 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3877
3878 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3879 w->events &= ~EV__IOFDSET;
3880
3881 EV_FREQUENT_CHECK;
3882}
3883
3884noinline
3885void
3886ev_io_stop (EV_P_ ev_io *w) EV_THROW
3887{
3888 clear_pending (EV_A_ (W)w);
3889 if (expect_false (!ev_is_active (w)))
3890 return;
3891
3892 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3893
3894 EV_FREQUENT_CHECK;
3895
3896 wlist_del (&anfds[w->fd].head, (WL)w);
3897 ev_stop (EV_A_ (W)w);
3898
3899 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3900
3901 EV_FREQUENT_CHECK;
3902}
3903
3904noinline
3905void
3906ev_timer_start (EV_P_ ev_timer *w) EV_THROW
3907{
3908 if (expect_false (ev_is_active (w)))
3909 return;
3910
3911 ev_at (w) += mn_now;
3912
3913 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
3914
3915 EV_FREQUENT_CHECK;
3916
3917 ++timercnt;
3918 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
3919 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
3920 ANHE_w (timers [ev_active (w)]) = (WT)w;
3921 ANHE_at_cache (timers [ev_active (w)]);
3922 upheap (timers, ev_active (w));
3923
3924 EV_FREQUENT_CHECK;
3925
3926 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
3927}
3928
3929noinline
3930void
3931ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
3932{
3933 clear_pending (EV_A_ (W)w);
3934 if (expect_false (!ev_is_active (w)))
3935 return;
3936
3937 EV_FREQUENT_CHECK;
3938
3939 {
3940 int active = ev_active (w);
3941
3942 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3943
3944 --timercnt;
3945
3946 if (expect_true (active < timercnt + HEAP0))
3947 {
3948 timers [active] = timers [timercnt + HEAP0];
3949 adjustheap (timers, timercnt, active);
3950 }
3951 }
3952
3953 ev_at (w) -= mn_now;
3954
3955 ev_stop (EV_A_ (W)w);
3956
3957 EV_FREQUENT_CHECK;
3958}
3959
3960noinline
3961void
3962ev_timer_again (EV_P_ ev_timer *w) EV_THROW
3963{
3964 EV_FREQUENT_CHECK;
3965
3966 clear_pending (EV_A_ (W)w);
3967
3968 if (ev_is_active (w))
3969 {
372 if (w->repeat) 3970 if (w->repeat)
373 { 3971 {
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; 3972 ev_at (w) = mn_now + w->repeat;
378 3973 ANHE_at_cache (timers [ev_active (w)]);
379 assert (w->at > now);
380
381 downheap (timers, timercnt, 0); 3974 adjustheap (timers, timercnt, ev_active (w));
382 } 3975 }
383 else 3976 else
3977 ev_timer_stop (EV_A_ w);
3978 }
3979 else if (w->repeat)
3980 {
3981 ev_at (w) = w->repeat;
3982 ev_timer_start (EV_A_ w);
3983 }
3984
3985 EV_FREQUENT_CHECK;
3986}
3987
3988ev_tstamp
3989ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3990{
3991 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3992}
3993
3994#if EV_PERIODIC_ENABLE
3995noinline
3996void
3997ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
3998{
3999 if (expect_false (ev_is_active (w)))
4000 return;
4001
4002 if (w->reschedule_cb)
4003 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
4004 else if (w->interval)
4005 {
4006 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
4007 periodic_recalc (EV_A_ w);
4008 }
4009 else
4010 ev_at (w) = w->offset;
4011
4012 EV_FREQUENT_CHECK;
4013
4014 ++periodiccnt;
4015 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
4016 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
4017 ANHE_w (periodics [ev_active (w)]) = (WT)w;
4018 ANHE_at_cache (periodics [ev_active (w)]);
4019 upheap (periodics, ev_active (w));
4020
4021 EV_FREQUENT_CHECK;
4022
4023 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
4024}
4025
4026noinline
4027void
4028ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
4029{
4030 clear_pending (EV_A_ (W)w);
4031 if (expect_false (!ev_is_active (w)))
4032 return;
4033
4034 EV_FREQUENT_CHECK;
4035
4036 {
4037 int active = ev_active (w);
4038
4039 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
4040
4041 --periodiccnt;
4042
4043 if (expect_true (active < periodiccnt + HEAP0))
4044 {
4045 periodics [active] = periodics [periodiccnt + HEAP0];
4046 adjustheap (periodics, periodiccnt, active);
4047 }
4048 }
4049
4050 ev_stop (EV_A_ (W)w);
4051
4052 EV_FREQUENT_CHECK;
4053}
4054
4055noinline
4056void
4057ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
4058{
4059 /* TODO: use adjustheap and recalculation */
4060 ev_periodic_stop (EV_A_ w);
4061 ev_periodic_start (EV_A_ w);
4062}
4063#endif
4064
4065#ifndef SA_RESTART
4066# define SA_RESTART 0
4067#endif
4068
4069#if EV_SIGNAL_ENABLE
4070
4071noinline
4072void
4073ev_signal_start (EV_P_ ev_signal *w) EV_THROW
4074{
4075 if (expect_false (ev_is_active (w)))
4076 return;
4077
4078 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
4079
4080#if EV_MULTIPLICITY
4081 assert (("libev: a signal must not be attached to two different loops",
4082 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
4083
4084 signals [w->signum - 1].loop = EV_A;
4085 ECB_MEMORY_FENCE_RELEASE;
4086#endif
4087
4088 EV_FREQUENT_CHECK;
4089
4090#if EV_USE_SIGNALFD
4091 if (sigfd == -2)
4092 {
4093 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
4094 if (sigfd < 0 && errno == EINVAL)
4095 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
4096
4097 if (sigfd >= 0)
384 { 4098 {
385 evtimer_stop (w); /* nonrepeating: stop timer */ 4099 fd_intern (sigfd); /* doing it twice will not hurt */
386 --timercnt; /* maybe pass by reference instead? */ 4100
4101 sigemptyset (&sigfd_set);
4102
4103 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
4104 ev_set_priority (&sigfd_w, EV_MAXPRI);
4105 ev_io_start (EV_A_ &sigfd_w);
4106 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
387 } 4107 }
4108 }
388 4109
389 event ((struct ev_watcher *)w, EV_TIMEOUT); 4110 if (sigfd >= 0)
4111 {
4112 /* TODO: check .head */
4113 sigaddset (&sigfd_set, w->signum);
4114 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
4115
4116 signalfd (sigfd, &sigfd_set, 0);
4117 }
4118#endif
4119
4120 ev_start (EV_A_ (W)w, 1);
4121 wlist_add (&signals [w->signum - 1].head, (WL)w);
4122
4123 if (!((WL)w)->next)
4124# if EV_USE_SIGNALFD
4125 if (sigfd < 0) /*TODO*/
4126# endif
4127 {
4128# ifdef _WIN32
4129 evpipe_init (EV_A);
4130
4131 signal (w->signum, ev_sighandler);
4132# else
4133 struct sigaction sa;
4134
4135 evpipe_init (EV_A);
4136
4137 sa.sa_handler = ev_sighandler;
4138 sigfillset (&sa.sa_mask);
4139 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
4140 sigaction (w->signum, &sa, 0);
4141
4142 if (origflags & EVFLAG_NOSIGMASK)
4143 {
4144 sigemptyset (&sa.sa_mask);
4145 sigaddset (&sa.sa_mask, w->signum);
4146 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4147 }
4148#endif
390 } 4149 }
391}
392 4150
4151 EV_FREQUENT_CHECK;
4152}
4153
4154noinline
4155void
4156ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
4157{
4158 clear_pending (EV_A_ (W)w);
4159 if (expect_false (!ev_is_active (w)))
4160 return;
4161
4162 EV_FREQUENT_CHECK;
4163
4164 wlist_del (&signals [w->signum - 1].head, (WL)w);
4165 ev_stop (EV_A_ (W)w);
4166
4167 if (!signals [w->signum - 1].head)
4168 {
4169#if EV_MULTIPLICITY
4170 signals [w->signum - 1].loop = 0; /* unattach from signal */
4171#endif
4172#if EV_USE_SIGNALFD
4173 if (sigfd >= 0)
4174 {
4175 sigset_t ss;
4176
4177 sigemptyset (&ss);
4178 sigaddset (&ss, w->signum);
4179 sigdelset (&sigfd_set, w->signum);
4180
4181 signalfd (sigfd, &sigfd_set, 0);
4182 sigprocmask (SIG_UNBLOCK, &ss, 0);
4183 }
4184 else
4185#endif
4186 signal (w->signum, SIG_DFL);
4187 }
4188
4189 EV_FREQUENT_CHECK;
4190}
4191
4192#endif
4193
4194#if EV_CHILD_ENABLE
4195
4196void
4197ev_child_start (EV_P_ ev_child *w) EV_THROW
4198{
4199#if EV_MULTIPLICITY
4200 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
4201#endif
4202 if (expect_false (ev_is_active (w)))
4203 return;
4204
4205 EV_FREQUENT_CHECK;
4206
4207 ev_start (EV_A_ (W)w, 1);
4208 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
4209
4210 EV_FREQUENT_CHECK;
4211}
4212
4213void
4214ev_child_stop (EV_P_ ev_child *w) EV_THROW
4215{
4216 clear_pending (EV_A_ (W)w);
4217 if (expect_false (!ev_is_active (w)))
4218 return;
4219
4220 EV_FREQUENT_CHECK;
4221
4222 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
4223 ev_stop (EV_A_ (W)w);
4224
4225 EV_FREQUENT_CHECK;
4226}
4227
4228#endif
4229
4230#if EV_STAT_ENABLE
4231
4232# ifdef _WIN32
4233# undef lstat
4234# define lstat(a,b) _stati64 (a,b)
4235# endif
4236
4237#define DEF_STAT_INTERVAL 5.0074891
4238#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
4239#define MIN_STAT_INTERVAL 0.1074891
4240
4241noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
4242
4243#if EV_USE_INOTIFY
4244
4245/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
4246# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
4247
4248noinline
393static void 4249static void
394time_update () 4250infy_add (EV_P_ ev_stat *w)
395{ 4251{
396 int i; 4252 w->wd = inotify_add_watch (fs_fd, w->path,
397 ev_now = ev_time (); 4253 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4254 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4255 | IN_DONT_FOLLOW | IN_MASK_ADD);
398 4256
399 if (have_monotonic) 4257 if (w->wd >= 0)
4258 {
4259 struct statfs sfs;
4260
4261 /* now local changes will be tracked by inotify, but remote changes won't */
4262 /* unless the filesystem is known to be local, we therefore still poll */
4263 /* also do poll on <2.6.25, but with normal frequency */
4264
4265 if (!fs_2625)
4266 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4267 else if (!statfs (w->path, &sfs)
4268 && (sfs.f_type == 0x1373 /* devfs */
4269 || sfs.f_type == 0x4006 /* fat */
4270 || sfs.f_type == 0x4d44 /* msdos */
4271 || sfs.f_type == 0xEF53 /* ext2/3 */
4272 || sfs.f_type == 0x72b6 /* jffs2 */
4273 || sfs.f_type == 0x858458f6 /* ramfs */
4274 || sfs.f_type == 0x5346544e /* ntfs */
4275 || sfs.f_type == 0x3153464a /* jfs */
4276 || sfs.f_type == 0x9123683e /* btrfs */
4277 || sfs.f_type == 0x52654973 /* reiser3 */
4278 || sfs.f_type == 0x01021994 /* tmpfs */
4279 || sfs.f_type == 0x58465342 /* xfs */))
4280 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4281 else
4282 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
400 { 4283 }
401 ev_tstamp odiff = diff; 4284 else
4285 {
4286 /* can't use inotify, continue to stat */
4287 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
402 4288
403 /* detecting time jumps is much more difficult */ 4289 /* if path is not there, monitor some parent directory for speedup hints */
404 for (i = 2; --i; ) /* loop a few times, before making important decisions */ 4290 /* note that exceeding the hardcoded path limit is not a correctness issue, */
4291 /* but an efficiency issue only */
4292 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
405 { 4293 {
406 now = get_clock (); 4294 char path [4096];
407 diff = ev_now - now; 4295 strcpy (path, w->path);
408 4296
409 if (fabs (odiff - diff) < MIN_TIMEJUMP) 4297 do
410 return; /* all is well */ 4298 {
4299 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
4300 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
411 4301
412 ev_now = ev_time (); 4302 char *pend = strrchr (path, '/');
4303
4304 if (!pend || pend == path)
4305 break;
4306
4307 *pend = 0;
4308 w->wd = inotify_add_watch (fs_fd, path, mask);
4309 }
4310 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
413 } 4311 }
4312 }
414 4313
415 /* time jump detected, reschedule atimers */ 4314 if (w->wd >= 0)
416 for (i = 0; i < atimercnt; ++i) 4315 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4316
4317 /* now re-arm timer, if required */
4318 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4319 ev_timer_again (EV_A_ &w->timer);
4320 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4321}
4322
4323noinline
4324static void
4325infy_del (EV_P_ ev_stat *w)
4326{
4327 int slot;
4328 int wd = w->wd;
4329
4330 if (wd < 0)
4331 return;
4332
4333 w->wd = -2;
4334 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
4335 wlist_del (&fs_hash [slot].head, (WL)w);
4336
4337 /* remove this watcher, if others are watching it, they will rearm */
4338 inotify_rm_watch (fs_fd, wd);
4339}
4340
4341noinline
4342static void
4343infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
4344{
4345 if (slot < 0)
4346 /* overflow, need to check for all hash slots */
4347 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
4348 infy_wd (EV_A_ slot, wd, ev);
4349 else
4350 {
4351 WL w_;
4352
4353 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
417 { 4354 {
418 struct ev_timer *w = atimers [i]; 4355 ev_stat *w = (ev_stat *)w_;
419 w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat; 4356 w_ = w_->next; /* lets us remove this watcher and all before it */
4357
4358 if (w->wd == wd || wd == -1)
4359 {
4360 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
4361 {
4362 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4363 w->wd = -1;
4364 infy_add (EV_A_ w); /* re-add, no matter what */
4365 }
4366
4367 stat_timer_cb (EV_A_ &w->timer, 0);
4368 }
420 } 4369 }
421 } 4370 }
4371}
4372
4373static void
4374infy_cb (EV_P_ ev_io *w, int revents)
4375{
4376 char buf [EV_INOTIFY_BUFSIZE];
4377 int ofs;
4378 int len = read (fs_fd, buf, sizeof (buf));
4379
4380 for (ofs = 0; ofs < len; )
4381 {
4382 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
4383 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4384 ofs += sizeof (struct inotify_event) + ev->len;
4385 }
4386}
4387
4388inline_size ecb_cold
4389void
4390ev_check_2625 (EV_P)
4391{
4392 /* kernels < 2.6.25 are borked
4393 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4394 */
4395 if (ev_linux_version () < 0x020619)
4396 return;
4397
4398 fs_2625 = 1;
4399}
4400
4401inline_size int
4402infy_newfd (void)
4403{
4404#if defined IN_CLOEXEC && defined IN_NONBLOCK
4405 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4406 if (fd >= 0)
4407 return fd;
4408#endif
4409 return inotify_init ();
4410}
4411
4412inline_size void
4413infy_init (EV_P)
4414{
4415 if (fs_fd != -2)
4416 return;
4417
4418 fs_fd = -1;
4419
4420 ev_check_2625 (EV_A);
4421
4422 fs_fd = infy_newfd ();
4423
4424 if (fs_fd >= 0)
4425 {
4426 fd_intern (fs_fd);
4427 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
4428 ev_set_priority (&fs_w, EV_MAXPRI);
4429 ev_io_start (EV_A_ &fs_w);
4430 ev_unref (EV_A);
4431 }
4432}
4433
4434inline_size void
4435infy_fork (EV_P)
4436{
4437 int slot;
4438
4439 if (fs_fd < 0)
4440 return;
4441
4442 ev_ref (EV_A);
4443 ev_io_stop (EV_A_ &fs_w);
4444 close (fs_fd);
4445 fs_fd = infy_newfd ();
4446
4447 if (fs_fd >= 0)
4448 {
4449 fd_intern (fs_fd);
4450 ev_io_set (&fs_w, fs_fd, EV_READ);
4451 ev_io_start (EV_A_ &fs_w);
4452 ev_unref (EV_A);
4453 }
4454
4455 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
4456 {
4457 WL w_ = fs_hash [slot].head;
4458 fs_hash [slot].head = 0;
4459
4460 while (w_)
4461 {
4462 ev_stat *w = (ev_stat *)w_;
4463 w_ = w_->next; /* lets us add this watcher */
4464
4465 w->wd = -1;
4466
4467 if (fs_fd >= 0)
4468 infy_add (EV_A_ w); /* re-add, no matter what */
4469 else
4470 {
4471 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4472 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4473 ev_timer_again (EV_A_ &w->timer);
4474 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4475 }
4476 }
4477 }
4478}
4479
4480#endif
4481
4482#ifdef _WIN32
4483# define EV_LSTAT(p,b) _stati64 (p, b)
4484#else
4485# define EV_LSTAT(p,b) lstat (p, b)
4486#endif
4487
4488void
4489ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
4490{
4491 if (lstat (w->path, &w->attr) < 0)
4492 w->attr.st_nlink = 0;
4493 else if (!w->attr.st_nlink)
4494 w->attr.st_nlink = 1;
4495}
4496
4497noinline
4498static void
4499stat_timer_cb (EV_P_ ev_timer *w_, int revents)
4500{
4501 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
4502
4503 ev_statdata prev = w->attr;
4504 ev_stat_stat (EV_A_ w);
4505
4506 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
4507 if (
4508 prev.st_dev != w->attr.st_dev
4509 || prev.st_ino != w->attr.st_ino
4510 || prev.st_mode != w->attr.st_mode
4511 || prev.st_nlink != w->attr.st_nlink
4512 || prev.st_uid != w->attr.st_uid
4513 || prev.st_gid != w->attr.st_gid
4514 || prev.st_rdev != w->attr.st_rdev
4515 || prev.st_size != w->attr.st_size
4516 || prev.st_atime != w->attr.st_atime
4517 || prev.st_mtime != w->attr.st_mtime
4518 || prev.st_ctime != w->attr.st_ctime
4519 ) {
4520 /* we only update w->prev on actual differences */
4521 /* in case we test more often than invoke the callback, */
4522 /* to ensure that prev is always different to attr */
4523 w->prev = prev;
4524
4525 #if EV_USE_INOTIFY
4526 if (fs_fd >= 0)
4527 {
4528 infy_del (EV_A_ w);
4529 infy_add (EV_A_ w);
4530 ev_stat_stat (EV_A_ w); /* avoid race... */
4531 }
4532 #endif
4533
4534 ev_feed_event (EV_A_ w, EV_STAT);
4535 }
4536}
4537
4538void
4539ev_stat_start (EV_P_ ev_stat *w) EV_THROW
4540{
4541 if (expect_false (ev_is_active (w)))
4542 return;
4543
4544 ev_stat_stat (EV_A_ w);
4545
4546 if (w->interval < MIN_STAT_INTERVAL && w->interval)
4547 w->interval = MIN_STAT_INTERVAL;
4548
4549 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
4550 ev_set_priority (&w->timer, ev_priority (w));
4551
4552#if EV_USE_INOTIFY
4553 infy_init (EV_A);
4554
4555 if (fs_fd >= 0)
4556 infy_add (EV_A_ w);
422 else 4557 else
4558#endif
4559 {
4560 ev_timer_again (EV_A_ &w->timer);
4561 ev_unref (EV_A);
4562 }
4563
4564 ev_start (EV_A_ (W)w, 1);
4565
4566 EV_FREQUENT_CHECK;
4567}
4568
4569void
4570ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
4571{
4572 clear_pending (EV_A_ (W)w);
4573 if (expect_false (!ev_is_active (w)))
4574 return;
4575
4576 EV_FREQUENT_CHECK;
4577
4578#if EV_USE_INOTIFY
4579 infy_del (EV_A_ w);
4580#endif
4581
4582 if (ev_is_active (&w->timer))
4583 {
4584 ev_ref (EV_A);
4585 ev_timer_stop (EV_A_ &w->timer);
4586 }
4587
4588 ev_stop (EV_A_ (W)w);
4589
4590 EV_FREQUENT_CHECK;
4591}
4592#endif
4593
4594#if EV_IDLE_ENABLE
4595void
4596ev_idle_start (EV_P_ ev_idle *w) EV_THROW
4597{
4598 if (expect_false (ev_is_active (w)))
4599 return;
4600
4601 pri_adjust (EV_A_ (W)w);
4602
4603 EV_FREQUENT_CHECK;
4604
4605 {
4606 int active = ++idlecnt [ABSPRI (w)];
4607
4608 ++idleall;
4609 ev_start (EV_A_ (W)w, active);
4610
4611 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
4612 idles [ABSPRI (w)][active - 1] = w;
4613 }
4614
4615 EV_FREQUENT_CHECK;
4616}
4617
4618void
4619ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
4620{
4621 clear_pending (EV_A_ (W)w);
4622 if (expect_false (!ev_is_active (w)))
4623 return;
4624
4625 EV_FREQUENT_CHECK;
4626
4627 {
4628 int active = ev_active (w);
4629
4630 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
4631 ev_active (idles [ABSPRI (w)][active - 1]) = active;
4632
4633 ev_stop (EV_A_ (W)w);
4634 --idleall;
4635 }
4636
4637 EV_FREQUENT_CHECK;
4638}
4639#endif
4640
4641#if EV_PREPARE_ENABLE
4642void
4643ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
4644{
4645 if (expect_false (ev_is_active (w)))
4646 return;
4647
4648 EV_FREQUENT_CHECK;
4649
4650 ev_start (EV_A_ (W)w, ++preparecnt);
4651 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
4652 prepares [preparecnt - 1] = w;
4653
4654 EV_FREQUENT_CHECK;
4655}
4656
4657void
4658ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
4659{
4660 clear_pending (EV_A_ (W)w);
4661 if (expect_false (!ev_is_active (w)))
4662 return;
4663
4664 EV_FREQUENT_CHECK;
4665
4666 {
4667 int active = ev_active (w);
4668
4669 prepares [active - 1] = prepares [--preparecnt];
4670 ev_active (prepares [active - 1]) = active;
4671 }
4672
4673 ev_stop (EV_A_ (W)w);
4674
4675 EV_FREQUENT_CHECK;
4676}
4677#endif
4678
4679#if EV_CHECK_ENABLE
4680void
4681ev_check_start (EV_P_ ev_check *w) EV_THROW
4682{
4683 if (expect_false (ev_is_active (w)))
4684 return;
4685
4686 EV_FREQUENT_CHECK;
4687
4688 ev_start (EV_A_ (W)w, ++checkcnt);
4689 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
4690 checks [checkcnt - 1] = w;
4691
4692 EV_FREQUENT_CHECK;
4693}
4694
4695void
4696ev_check_stop (EV_P_ ev_check *w) EV_THROW
4697{
4698 clear_pending (EV_A_ (W)w);
4699 if (expect_false (!ev_is_active (w)))
4700 return;
4701
4702 EV_FREQUENT_CHECK;
4703
4704 {
4705 int active = ev_active (w);
4706
4707 checks [active - 1] = checks [--checkcnt];
4708 ev_active (checks [active - 1]) = active;
4709 }
4710
4711 ev_stop (EV_A_ (W)w);
4712
4713 EV_FREQUENT_CHECK;
4714}
4715#endif
4716
4717#if EV_EMBED_ENABLE
4718noinline
4719void
4720ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
4721{
4722 ev_run (w->other, EVRUN_NOWAIT);
4723}
4724
4725static void
4726embed_io_cb (EV_P_ ev_io *io, int revents)
4727{
4728 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
4729
4730 if (ev_cb (w))
4731 ev_feed_event (EV_A_ (W)w, EV_EMBED);
4732 else
4733 ev_run (w->other, EVRUN_NOWAIT);
4734}
4735
4736static void
4737embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4738{
4739 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4740
4741 {
4742 EV_P = w->other;
4743
4744 while (fdchangecnt)
423 { 4745 {
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
429 now = ev_now;
430 }
431}
432
433int ev_loop_done;
434
435void ev_loop (int flags)
436{
437 double block;
438 ev_loop_done = flags & EVLOOP_ONESHOT;
439
440 do
441 {
442 /* update fd-related kernel structures */
443 fd_reify (); 4746 fd_reify (EV_A);
4747 ev_run (EV_A_ EVRUN_NOWAIT);
4748 }
4749 }
4750}
444 4751
445 /* calculate blocking time */ 4752static void
446 if (flags & EVLOOP_NONBLOCK) 4753embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
447 block = 0.; 4754{
4755 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4756
4757 ev_embed_stop (EV_A_ w);
4758
4759 {
4760 EV_P = w->other;
4761
4762 ev_loop_fork (EV_A);
4763 ev_run (EV_A_ EVRUN_NOWAIT);
4764 }
4765
4766 ev_embed_start (EV_A_ w);
4767}
4768
4769#if 0
4770static void
4771embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4772{
4773 ev_idle_stop (EV_A_ idle);
4774}
4775#endif
4776
4777void
4778ev_embed_start (EV_P_ ev_embed *w) EV_THROW
4779{
4780 if (expect_false (ev_is_active (w)))
4781 return;
4782
4783 {
4784 EV_P = w->other;
4785 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4786 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4787 }
4788
4789 EV_FREQUENT_CHECK;
4790
4791 ev_set_priority (&w->io, ev_priority (w));
4792 ev_io_start (EV_A_ &w->io);
4793
4794 ev_prepare_init (&w->prepare, embed_prepare_cb);
4795 ev_set_priority (&w->prepare, EV_MINPRI);
4796 ev_prepare_start (EV_A_ &w->prepare);
4797
4798 ev_fork_init (&w->fork, embed_fork_cb);
4799 ev_fork_start (EV_A_ &w->fork);
4800
4801 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4802
4803 ev_start (EV_A_ (W)w, 1);
4804
4805 EV_FREQUENT_CHECK;
4806}
4807
4808void
4809ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
4810{
4811 clear_pending (EV_A_ (W)w);
4812 if (expect_false (!ev_is_active (w)))
4813 return;
4814
4815 EV_FREQUENT_CHECK;
4816
4817 ev_io_stop (EV_A_ &w->io);
4818 ev_prepare_stop (EV_A_ &w->prepare);
4819 ev_fork_stop (EV_A_ &w->fork);
4820
4821 ev_stop (EV_A_ (W)w);
4822
4823 EV_FREQUENT_CHECK;
4824}
4825#endif
4826
4827#if EV_FORK_ENABLE
4828void
4829ev_fork_start (EV_P_ ev_fork *w) EV_THROW
4830{
4831 if (expect_false (ev_is_active (w)))
4832 return;
4833
4834 EV_FREQUENT_CHECK;
4835
4836 ev_start (EV_A_ (W)w, ++forkcnt);
4837 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4838 forks [forkcnt - 1] = w;
4839
4840 EV_FREQUENT_CHECK;
4841}
4842
4843void
4844ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
4845{
4846 clear_pending (EV_A_ (W)w);
4847 if (expect_false (!ev_is_active (w)))
4848 return;
4849
4850 EV_FREQUENT_CHECK;
4851
4852 {
4853 int active = ev_active (w);
4854
4855 forks [active - 1] = forks [--forkcnt];
4856 ev_active (forks [active - 1]) = active;
4857 }
4858
4859 ev_stop (EV_A_ (W)w);
4860
4861 EV_FREQUENT_CHECK;
4862}
4863#endif
4864
4865#if EV_CLEANUP_ENABLE
4866void
4867ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4868{
4869 if (expect_false (ev_is_active (w)))
4870 return;
4871
4872 EV_FREQUENT_CHECK;
4873
4874 ev_start (EV_A_ (W)w, ++cleanupcnt);
4875 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4876 cleanups [cleanupcnt - 1] = w;
4877
4878 /* cleanup watchers should never keep a refcount on the loop */
4879 ev_unref (EV_A);
4880 EV_FREQUENT_CHECK;
4881}
4882
4883void
4884ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4885{
4886 clear_pending (EV_A_ (W)w);
4887 if (expect_false (!ev_is_active (w)))
4888 return;
4889
4890 EV_FREQUENT_CHECK;
4891 ev_ref (EV_A);
4892
4893 {
4894 int active = ev_active (w);
4895
4896 cleanups [active - 1] = cleanups [--cleanupcnt];
4897 ev_active (cleanups [active - 1]) = active;
4898 }
4899
4900 ev_stop (EV_A_ (W)w);
4901
4902 EV_FREQUENT_CHECK;
4903}
4904#endif
4905
4906#if EV_ASYNC_ENABLE
4907void
4908ev_async_start (EV_P_ ev_async *w) EV_THROW
4909{
4910 if (expect_false (ev_is_active (w)))
4911 return;
4912
4913 w->sent = 0;
4914
4915 evpipe_init (EV_A);
4916
4917 EV_FREQUENT_CHECK;
4918
4919 ev_start (EV_A_ (W)w, ++asynccnt);
4920 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4921 asyncs [asynccnt - 1] = w;
4922
4923 EV_FREQUENT_CHECK;
4924}
4925
4926void
4927ev_async_stop (EV_P_ ev_async *w) EV_THROW
4928{
4929 clear_pending (EV_A_ (W)w);
4930 if (expect_false (!ev_is_active (w)))
4931 return;
4932
4933 EV_FREQUENT_CHECK;
4934
4935 {
4936 int active = ev_active (w);
4937
4938 asyncs [active - 1] = asyncs [--asynccnt];
4939 ev_active (asyncs [active - 1]) = active;
4940 }
4941
4942 ev_stop (EV_A_ (W)w);
4943
4944 EV_FREQUENT_CHECK;
4945}
4946
4947void
4948ev_async_send (EV_P_ ev_async *w) EV_THROW
4949{
4950 w->sent = 1;
4951 evpipe_write (EV_A_ &async_pending);
4952}
4953#endif
4954
4955/*****************************************************************************/
4956
4957struct ev_once
4958{
4959 ev_io io;
4960 ev_timer to;
4961 void (*cb)(int revents, void *arg);
4962 void *arg;
4963};
4964
4965static void
4966once_cb (EV_P_ struct ev_once *once, int revents)
4967{
4968 void (*cb)(int revents, void *arg) = once->cb;
4969 void *arg = once->arg;
4970
4971 ev_io_stop (EV_A_ &once->io);
4972 ev_timer_stop (EV_A_ &once->to);
4973 ev_free (once);
4974
4975 cb (revents, arg);
4976}
4977
4978static void
4979once_cb_io (EV_P_ ev_io *w, int revents)
4980{
4981 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4982
4983 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
4984}
4985
4986static void
4987once_cb_to (EV_P_ ev_timer *w, int revents)
4988{
4989 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4990
4991 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
4992}
4993
4994void
4995ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
4996{
4997 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
4998
4999 if (expect_false (!once))
5000 {
5001 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
5002 return;
5003 }
5004
5005 once->cb = cb;
5006 once->arg = arg;
5007
5008 ev_init (&once->io, once_cb_io);
5009 if (fd >= 0)
5010 {
5011 ev_io_set (&once->io, fd, events);
5012 ev_io_start (EV_A_ &once->io);
5013 }
5014
5015 ev_init (&once->to, once_cb_to);
5016 if (timeout >= 0.)
5017 {
5018 ev_timer_set (&once->to, timeout, 0.);
5019 ev_timer_start (EV_A_ &once->to);
5020 }
5021}
5022
5023/*****************************************************************************/
5024
5025#if EV_WALK_ENABLE
5026ecb_cold
5027void
5028ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
5029{
5030 int i, j;
5031 ev_watcher_list *wl, *wn;
5032
5033 if (types & (EV_IO | EV_EMBED))
5034 for (i = 0; i < anfdmax; ++i)
5035 for (wl = anfds [i].head; wl; )
5036 {
5037 wn = wl->next;
5038
5039#if EV_EMBED_ENABLE
5040 if (ev_cb ((ev_io *)wl) == embed_io_cb)
5041 {
5042 if (types & EV_EMBED)
5043 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
5044 }
5045 else
5046#endif
5047#if EV_USE_INOTIFY
5048 if (ev_cb ((ev_io *)wl) == infy_cb)
5049 ;
5050 else
5051#endif
5052 if ((ev_io *)wl != &pipe_w)
5053 if (types & EV_IO)
5054 cb (EV_A_ EV_IO, wl);
5055
5056 wl = wn;
5057 }
5058
5059 if (types & (EV_TIMER | EV_STAT))
5060 for (i = timercnt + HEAP0; i-- > HEAP0; )
5061#if EV_STAT_ENABLE
5062 /*TODO: timer is not always active*/
5063 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
5064 {
5065 if (types & EV_STAT)
5066 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
5067 }
448 else 5068 else
5069#endif
5070 if (types & EV_TIMER)
5071 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
5072
5073#if EV_PERIODIC_ENABLE
5074 if (types & EV_PERIODIC)
5075 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
5076 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
5077#endif
5078
5079#if EV_IDLE_ENABLE
5080 if (types & EV_IDLE)
5081 for (j = NUMPRI; j--; )
5082 for (i = idlecnt [j]; i--; )
5083 cb (EV_A_ EV_IDLE, idles [j][i]);
5084#endif
5085
5086#if EV_FORK_ENABLE
5087 if (types & EV_FORK)
5088 for (i = forkcnt; i--; )
5089 if (ev_cb (forks [i]) != embed_fork_cb)
5090 cb (EV_A_ EV_FORK, forks [i]);
5091#endif
5092
5093#if EV_ASYNC_ENABLE
5094 if (types & EV_ASYNC)
5095 for (i = asynccnt; i--; )
5096 cb (EV_A_ EV_ASYNC, asyncs [i]);
5097#endif
5098
5099#if EV_PREPARE_ENABLE
5100 if (types & EV_PREPARE)
5101 for (i = preparecnt; i--; )
5102# if EV_EMBED_ENABLE
5103 if (ev_cb (prepares [i]) != embed_prepare_cb)
5104# endif
5105 cb (EV_A_ EV_PREPARE, prepares [i]);
5106#endif
5107
5108#if EV_CHECK_ENABLE
5109 if (types & EV_CHECK)
5110 for (i = checkcnt; i--; )
5111 cb (EV_A_ EV_CHECK, checks [i]);
5112#endif
5113
5114#if EV_SIGNAL_ENABLE
5115 if (types & EV_SIGNAL)
5116 for (i = 0; i < EV_NSIG - 1; ++i)
5117 for (wl = signals [i].head; wl; )
449 { 5118 {
450 block = MAX_BLOCKTIME; 5119 wn = wl->next;
451 5120 cb (EV_A_ EV_SIGNAL, wl);
452 if (rtimercnt) 5121 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 } 5122 }
5123#endif
466 5124
467 method_poll (block); 5125#if EV_CHILD_ENABLE
468 5126 if (types & EV_CHILD)
469 /* update ev_now, do magic */ 5127 for (i = (EV_PID_HASHSIZE); i--; )
470 time_update (); 5128 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 { 5129 {
497 *head = elem->next; 5130 wn = wl->next;
498 return; 5131 cb (EV_A_ EV_CHILD, wl);
5132 wl = wn;
499 } 5133 }
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 5134#endif
688 5135/* EV_STAT 0x00001000 /* stat data changed */
689 struct ev_timer t1; 5136/* 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} 5137}
703
704#endif 5138#endif
705 5139
5140#if EV_MULTIPLICITY
5141 #include "ev_wrap.h"
5142#endif
706 5143
707
708

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