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Comparing libev/ev.c (file contents):
Revision 1.45 by root, Sat Nov 3 09:19:58 2007 UTC vs.
Revision 1.472 by root, Tue Sep 9 13:24:13 2014 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2012,2013 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met:
10 * 9 *
11 * * Redistributions of source code must retain the above copyright 10 * 1. Redistributions of source code must retain the above copyright notice,
12 * notice, this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
13 * 12 *
14 * * Redistributions in binary form must reproduce the above 13 * 2. Redistributions in binary form must reproduce the above copyright
15 * copyright notice, this list of conditions and the following 14 * notice, this list of conditions and the following disclaimer in the
16 * disclaimer in the documentation and/or other materials provided 15 * documentation and/or other materials provided with the distribution.
17 * with the distribution.
18 * 16 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
30 */ 38 */
39
40/* this big block deduces configuration from config.h */
41#ifndef EV_STANDALONE
31#if EV_USE_CONFIG_H 42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H
44# else
32# include "config.h" 45# include "config.h"
33#endif 46# endif
34 47
35#include <math.h> 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
36#include <stdlib.h> 167#include <stdlib.h>
37#include <unistd.h> 168#include <string.h>
38#include <fcntl.h> 169#include <fcntl.h>
39#include <signal.h>
40#include <stddef.h> 170#include <stddef.h>
41 171
42#include <stdio.h> 172#include <stdio.h>
43 173
44#include <assert.h> 174#include <assert.h>
45#include <errno.h> 175#include <errno.h>
46#include <sys/types.h> 176#include <sys/types.h>
177#include <time.h>
178#include <limits.h>
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
47#ifndef WIN32 199#ifndef _WIN32
200# include <sys/time.h>
48# include <sys/wait.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
49#endif 210# endif
50#include <sys/time.h> 211# undef EV_AVOID_STDIO
51#include <time.h> 212#endif
52 213
53/**/ 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
54 269
55#ifndef EV_USE_MONOTONIC 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
56# define EV_USE_MONOTONIC 1 274# 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
57#endif 288#endif
58 289
59#ifndef EV_USE_SELECT 290#ifndef EV_USE_SELECT
60# define EV_USE_SELECT 1 291# define EV_USE_SELECT EV_FEATURE_BACKENDS
61#endif 292#endif
62 293
63#ifndef EV_USE_POLL 294#ifndef EV_USE_POLL
64# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ 295# ifdef _WIN32
296# define EV_USE_POLL 0
297# else
298# define EV_USE_POLL EV_FEATURE_BACKENDS
299# endif
65#endif 300#endif
66 301
67#ifndef EV_USE_EPOLL 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
68# define EV_USE_EPOLL 0 306# define EV_USE_EPOLL 0
307# endif
69#endif 308#endif
70 309
71#ifndef EV_USE_KQUEUE 310#ifndef EV_USE_KQUEUE
72# define EV_USE_KQUEUE 0 311# define EV_USE_KQUEUE 0
73#endif 312#endif
74 313
75#ifndef EV_USE_REALTIME 314#ifndef EV_USE_PORT
76# define EV_USE_REALTIME 1 315# 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
77#endif 323# endif
324#endif
78 325
79/**/ 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 */
80 399
81#ifndef CLOCK_MONOTONIC 400#ifndef CLOCK_MONOTONIC
82# undef EV_USE_MONOTONIC 401# undef EV_USE_MONOTONIC
83# define EV_USE_MONOTONIC 0 402# define EV_USE_MONOTONIC 0
84#endif 403#endif
… …
86#ifndef CLOCK_REALTIME 405#ifndef CLOCK_REALTIME
87# undef EV_USE_REALTIME 406# undef EV_USE_REALTIME
88# define EV_USE_REALTIME 0 407# define EV_USE_REALTIME 0
89#endif 408#endif
90 409
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>
419# endif
420#endif
421
422#if EV_USE_INOTIFY
423# include <sys/statfs.h>
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
91/**/ 470/**/
92 471
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 */
484
93#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) */
94#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 486#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
95#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
96/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
97 487
98#include "ev.h" 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)
99 490
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 (©) 2009-2014 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 0x00010003
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;
100#if __GNUC__ >= 3 546 #if __GNUC__
101# define expect(expr,value) __builtin_expect ((expr),(value)) 547 typedef signed long long int64_t;
102# define inline inline 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
103#else 562#else
104# define expect(expr,value) (expr) 563 #include <inttypes.h>
105# define inline static 564 #if UINTMAX_MAX > 0xffffffffU
565 #define ECB_PTRSIZE 8
566 #else
567 #define ECB_PTRSIZE 4
106#endif 568 #endif
569#endif
107 570
108#define expect_false(expr) expect ((expr) != 0, 0) 571/* work around x32 idiocy by defining proper macros */
109#define expect_true(expr) expect ((expr) != 0, 1) 572#if __amd64 || __x86_64 || _M_AMD64 || _M_X64
573 #if _ILP32
574 #define ECB_AMD64_X32 1
575 #else
576 #define ECB_AMD64 1
577 #endif
578#endif
110 579
111#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 580/* many compilers define _GNUC_ to some versions but then only implement
112#define ABSPRI(w) ((w)->priority - EV_MINPRI) 581 * what their idiot authors think are the "more important" extensions,
582 * causing enormous grief in return for some better fake benchmark numbers.
583 * or so.
584 * we try to detect these and simply assume they are not gcc - if they have
585 * an issue with that they should have done it right in the first place.
586 */
587#ifndef ECB_GCC_VERSION
588 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
589 #define ECB_GCC_VERSION(major,minor) 0
590 #else
591 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
592 #endif
593#endif
113 594
114typedef struct ev_watcher *W; 595#define ECB_CPP (__cplusplus+0)
115typedef struct ev_watcher_list *WL; 596#define ECB_CPP11 (__cplusplus >= 201103L)
116typedef struct ev_watcher_time *WT;
117 597
118static ev_tstamp now_floor, now, diff; /* monotonic clock */ 598#if ECB_CPP
119ev_tstamp ev_now; 599 #define ECB_C 0
120int ev_method; 600 #define ECB_STDC_VERSION 0
601#else
602 #define ECB_C 1
603 #define ECB_STDC_VERSION __STDC_VERSION__
604#endif
121 605
122static int have_monotonic; /* runtime */ 606#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
607#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
123 608
124static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 609#if ECB_CPP
125static void (*method_modify)(int fd, int oev, int nev); 610 #define ECB_EXTERN_C extern "C"
126static void (*method_poll)(ev_tstamp timeout); 611 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
612 #define ECB_EXTERN_C_END }
613#else
614 #define ECB_EXTERN_C extern
615 #define ECB_EXTERN_C_BEG
616 #define ECB_EXTERN_C_END
617#endif
127 618
128/*****************************************************************************/ 619/*****************************************************************************/
129 620
621/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
622/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
623
624#if ECB_NO_THREADS
625 #define ECB_NO_SMP 1
626#endif
627
628#if ECB_NO_SMP
629 #define ECB_MEMORY_FENCE do { } while (0)
630#endif
631
632#ifndef ECB_MEMORY_FENCE
633 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
634 #if __i386 || __i386__
635 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
636 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
637 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
638 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
639 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
640 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
641 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
642 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
643 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
644 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
645 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
646 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
647 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
648 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
649 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
650 #elif __aarch64__
651 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
652 #elif (__sparc || __sparc__) && !__sparcv8
653 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
654 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
655 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
656 #elif defined __s390__ || defined __s390x__
657 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
658 #elif defined __mips__
659 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
660 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
661 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
662 #elif defined __alpha__
663 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
664 #elif defined __hppa__
665 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
666 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
667 #elif defined __ia64__
668 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
669 #elif defined __m68k__
670 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
671 #elif defined __m88k__
672 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
673 #elif defined __sh__
674 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
675 #endif
676 #endif
677#endif
678
679#ifndef ECB_MEMORY_FENCE
680 #if ECB_GCC_VERSION(4,7)
681 /* see comment below (stdatomic.h) about the C11 memory model. */
682 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
683 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
684 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
685
686 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
687 * without risking compile time errors with other compilers. We *could*
688 * define our own ecb_clang_has_feature, but I just can't be bothered to work
689 * around this shit time and again.
690 * #elif defined __clang && __has_feature (cxx_atomic)
691 * // see comment below (stdatomic.h) about the C11 memory model.
692 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
693 * #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
694 * #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
695 */
696
697 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
698 #define ECB_MEMORY_FENCE __sync_synchronize ()
699 #elif _MSC_VER >= 1500 /* VC++ 2008 */
700 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
701 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
702 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
703 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
704 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
705 #elif _MSC_VER >= 1400 /* VC++ 2005 */
706 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
707 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
708 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
709 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
710 #elif defined _WIN32
711 #include <WinNT.h>
712 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
713 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
714 #include <mbarrier.h>
715 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
716 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
717 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
718 #elif __xlC__
719 #define ECB_MEMORY_FENCE __sync ()
720 #endif
721#endif
722
723#ifndef ECB_MEMORY_FENCE
724 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
725 /* we assume that these memory fences work on all variables/all memory accesses, */
726 /* not just C11 atomics and atomic accesses */
727 #include <stdatomic.h>
728 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
729 /* any fence other than seq_cst, which isn't very efficient for us. */
730 /* Why that is, we don't know - either the C11 memory model is quite useless */
731 /* for most usages, or gcc and clang have a bug */
732 /* I *currently* lean towards the latter, and inefficiently implement */
733 /* all three of ecb's fences as a seq_cst fence */
734 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
735 /* for all __atomic_thread_fence's except seq_cst */
736 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
737 #endif
738#endif
739
740#ifndef ECB_MEMORY_FENCE
741 #if !ECB_AVOID_PTHREADS
742 /*
743 * if you get undefined symbol references to pthread_mutex_lock,
744 * or failure to find pthread.h, then you should implement
745 * the ECB_MEMORY_FENCE operations for your cpu/compiler
746 * OR provide pthread.h and link against the posix thread library
747 * of your system.
748 */
749 #include <pthread.h>
750 #define ECB_NEEDS_PTHREADS 1
751 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
752
753 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
754 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
755 #endif
756#endif
757
758#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
759 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
760#endif
761
762#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
763 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
764#endif
765
766/*****************************************************************************/
767
768#if __cplusplus
769 #define ecb_inline static inline
770#elif ECB_GCC_VERSION(2,5)
771 #define ecb_inline static __inline__
772#elif ECB_C99
773 #define ecb_inline static inline
774#else
775 #define ecb_inline static
776#endif
777
778#if ECB_GCC_VERSION(3,3)
779 #define ecb_restrict __restrict__
780#elif ECB_C99
781 #define ecb_restrict restrict
782#else
783 #define ecb_restrict
784#endif
785
786typedef int ecb_bool;
787
788#define ECB_CONCAT_(a, b) a ## b
789#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
790#define ECB_STRINGIFY_(a) # a
791#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
792
793#define ecb_function_ ecb_inline
794
795#if ECB_GCC_VERSION(3,1)
796 #define ecb_attribute(attrlist) __attribute__(attrlist)
797 #define ecb_is_constant(expr) __builtin_constant_p (expr)
798 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
799 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
800#else
801 #define ecb_attribute(attrlist)
802
803 /* possible C11 impl for integral types
804 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
805 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
806
807 #define ecb_is_constant(expr) 0
808 #define ecb_expect(expr,value) (expr)
809 #define ecb_prefetch(addr,rw,locality)
810#endif
811
812/* no emulation for ecb_decltype */
813#if ECB_GCC_VERSION(4,5)
814 #define ecb_decltype(x) __decltype(x)
815#elif ECB_GCC_VERSION(3,0)
816 #define ecb_decltype(x) __typeof(x)
817#endif
818
819#if _MSC_VER >= 1300
820 #define ecb_deprecated __declspec(deprecated)
821#else
822 #define ecb_deprecated ecb_attribute ((__deprecated__))
823#endif
824
825#define ecb_noinline ecb_attribute ((__noinline__))
826#define ecb_unused ecb_attribute ((__unused__))
827#define ecb_const ecb_attribute ((__const__))
828#define ecb_pure ecb_attribute ((__pure__))
829
830/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */
831#if ECB_C11
832 #define ecb_noreturn _Noreturn
833#else
834 #define ecb_noreturn ecb_attribute ((__noreturn__))
835#endif
836
837#if ECB_GCC_VERSION(4,3)
838 #define ecb_artificial ecb_attribute ((__artificial__))
839 #define ecb_hot ecb_attribute ((__hot__))
840 #define ecb_cold ecb_attribute ((__cold__))
841#else
842 #define ecb_artificial
843 #define ecb_hot
844 #define ecb_cold
845#endif
846
847/* put around conditional expressions if you are very sure that the */
848/* expression is mostly true or mostly false. note that these return */
849/* booleans, not the expression. */
850#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
851#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
852/* for compatibility to the rest of the world */
853#define ecb_likely(expr) ecb_expect_true (expr)
854#define ecb_unlikely(expr) ecb_expect_false (expr)
855
856/* count trailing zero bits and count # of one bits */
857#if ECB_GCC_VERSION(3,4)
858 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
859 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
860 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
861 #define ecb_ctz32(x) __builtin_ctz (x)
862 #define ecb_ctz64(x) __builtin_ctzll (x)
863 #define ecb_popcount32(x) __builtin_popcount (x)
864 /* no popcountll */
865#else
866 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
867 ecb_function_ int
868 ecb_ctz32 (uint32_t x)
869 {
870 int r = 0;
871
872 x &= ~x + 1; /* this isolates the lowest bit */
873
874#if ECB_branchless_on_i386
875 r += !!(x & 0xaaaaaaaa) << 0;
876 r += !!(x & 0xcccccccc) << 1;
877 r += !!(x & 0xf0f0f0f0) << 2;
878 r += !!(x & 0xff00ff00) << 3;
879 r += !!(x & 0xffff0000) << 4;
880#else
881 if (x & 0xaaaaaaaa) r += 1;
882 if (x & 0xcccccccc) r += 2;
883 if (x & 0xf0f0f0f0) r += 4;
884 if (x & 0xff00ff00) r += 8;
885 if (x & 0xffff0000) r += 16;
886#endif
887
888 return r;
889 }
890
891 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
892 ecb_function_ int
893 ecb_ctz64 (uint64_t x)
894 {
895 int shift = x & 0xffffffffU ? 0 : 32;
896 return ecb_ctz32 (x >> shift) + shift;
897 }
898
899 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
900 ecb_function_ int
901 ecb_popcount32 (uint32_t x)
902 {
903 x -= (x >> 1) & 0x55555555;
904 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
905 x = ((x >> 4) + x) & 0x0f0f0f0f;
906 x *= 0x01010101;
907
908 return x >> 24;
909 }
910
911 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
912 ecb_function_ int ecb_ld32 (uint32_t x)
913 {
914 int r = 0;
915
916 if (x >> 16) { x >>= 16; r += 16; }
917 if (x >> 8) { x >>= 8; r += 8; }
918 if (x >> 4) { x >>= 4; r += 4; }
919 if (x >> 2) { x >>= 2; r += 2; }
920 if (x >> 1) { r += 1; }
921
922 return r;
923 }
924
925 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
926 ecb_function_ int ecb_ld64 (uint64_t x)
927 {
928 int r = 0;
929
930 if (x >> 32) { x >>= 32; r += 32; }
931
932 return r + ecb_ld32 (x);
933 }
934#endif
935
936ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
937ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
938ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
939ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
940
941ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
942ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
943{
944 return ( (x * 0x0802U & 0x22110U)
945 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
946}
947
948ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
949ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
950{
951 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
952 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
953 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
954 x = ( x >> 8 ) | ( x << 8);
955
956 return x;
957}
958
959ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
960ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
961{
962 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
963 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
964 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
965 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
966 x = ( x >> 16 ) | ( x << 16);
967
968 return x;
969}
970
971/* popcount64 is only available on 64 bit cpus as gcc builtin */
972/* so for this version we are lazy */
973ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
974ecb_function_ int
975ecb_popcount64 (uint64_t x)
976{
977 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
978}
979
980ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
981ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
982ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
983ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
984ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
985ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
986ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
987ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
988
989ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
990ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
991ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
992ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
993ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
994ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
995ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
996ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
997
998#if ECB_GCC_VERSION(4,3)
999 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1000 #define ecb_bswap32(x) __builtin_bswap32 (x)
1001 #define ecb_bswap64(x) __builtin_bswap64 (x)
1002#else
1003 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
1004 ecb_function_ uint16_t
1005 ecb_bswap16 (uint16_t x)
1006 {
1007 return ecb_rotl16 (x, 8);
1008 }
1009
1010 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
1011 ecb_function_ uint32_t
1012 ecb_bswap32 (uint32_t x)
1013 {
1014 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1015 }
1016
1017 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
1018 ecb_function_ uint64_t
1019 ecb_bswap64 (uint64_t x)
1020 {
1021 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1022 }
1023#endif
1024
1025#if ECB_GCC_VERSION(4,5)
1026 #define ecb_unreachable() __builtin_unreachable ()
1027#else
1028 /* this seems to work fine, but gcc always emits a warning for it :/ */
1029 ecb_inline void ecb_unreachable (void) ecb_noreturn;
1030 ecb_inline void ecb_unreachable (void) { }
1031#endif
1032
1033/* try to tell the compiler that some condition is definitely true */
1034#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1035
1036ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
1037ecb_inline unsigned char
1038ecb_byteorder_helper (void)
1039{
1040 /* the union code still generates code under pressure in gcc, */
1041 /* but less than using pointers, and always seems to */
1042 /* successfully return a constant. */
1043 /* the reason why we have this horrible preprocessor mess */
1044 /* is to avoid it in all cases, at least on common architectures */
1045 /* or when using a recent enough gcc version (>= 4.6) */
1046#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
1047 return 0x44;
1048#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
1049 return 0x44;
1050#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
1051 return 0x11;
1052#else
1053 union
1054 {
1055 uint32_t i;
1056 uint8_t c;
1057 } u = { 0x11223344 };
1058 return u.c;
1059#endif
1060}
1061
1062ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
1063ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1064ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
1065ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1066
1067#if ECB_GCC_VERSION(3,0) || ECB_C99
1068 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1069#else
1070 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1071#endif
1072
1073#if __cplusplus
1074 template<typename T>
1075 static inline T ecb_div_rd (T val, T div)
1076 {
1077 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1078 }
1079 template<typename T>
1080 static inline T ecb_div_ru (T val, T div)
1081 {
1082 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1083 }
1084#else
1085 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1086 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1087#endif
1088
1089#if ecb_cplusplus_does_not_suck
1090 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1091 template<typename T, int N>
1092 static inline int ecb_array_length (const T (&arr)[N])
1093 {
1094 return N;
1095 }
1096#else
1097 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1098#endif
1099
1100/*******************************************************************************/
1101/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1102
1103/* basically, everything uses "ieee pure-endian" floating point numbers */
1104/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1105#if 0 \
1106 || __i386 || __i386__ \
1107 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1108 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1109 || defined __s390__ || defined __s390x__ \
1110 || defined __mips__ \
1111 || defined __alpha__ \
1112 || defined __hppa__ \
1113 || defined __ia64__ \
1114 || defined __m68k__ \
1115 || defined __m88k__ \
1116 || defined __sh__ \
1117 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \
1118 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1119 || defined __aarch64__
1120 #define ECB_STDFP 1
1121 #include <string.h> /* for memcpy */
1122#else
1123 #define ECB_STDFP 0
1124#endif
1125
1126#ifndef ECB_NO_LIBM
1127
1128 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1129
1130 /* only the oldest of old doesn't have this one. solaris. */
1131 #ifdef INFINITY
1132 #define ECB_INFINITY INFINITY
1133 #else
1134 #define ECB_INFINITY HUGE_VAL
1135 #endif
1136
1137 #ifdef NAN
1138 #define ECB_NAN NAN
1139 #else
1140 #define ECB_NAN ECB_INFINITY
1141 #endif
1142
1143 /* converts an ieee half/binary16 to a float */
1144 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;
1145 ecb_function_ float
1146 ecb_binary16_to_float (uint16_t x)
1147 {
1148 int e = (x >> 10) & 0x1f;
1149 int m = x & 0x3ff;
1150 float r;
1151
1152 if (!e ) r = ldexpf (m , -24);
1153 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
1154 else if (m ) r = ECB_NAN;
1155 else r = ECB_INFINITY;
1156
1157 return x & 0x8000 ? -r : r;
1158 }
1159
1160 /* convert a float to ieee single/binary32 */
1161 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1162 ecb_function_ uint32_t
1163 ecb_float_to_binary32 (float x)
1164 {
1165 uint32_t r;
1166
1167 #if ECB_STDFP
1168 memcpy (&r, &x, 4);
1169 #else
1170 /* slow emulation, works for anything but -0 */
1171 uint32_t m;
1172 int e;
1173
1174 if (x == 0e0f ) return 0x00000000U;
1175 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1176 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1177 if (x != x ) return 0x7fbfffffU;
1178
1179 m = frexpf (x, &e) * 0x1000000U;
1180
1181 r = m & 0x80000000U;
1182
1183 if (r)
1184 m = -m;
1185
1186 if (e <= -126)
1187 {
1188 m &= 0xffffffU;
1189 m >>= (-125 - e);
1190 e = -126;
1191 }
1192
1193 r |= (e + 126) << 23;
1194 r |= m & 0x7fffffU;
1195 #endif
1196
1197 return r;
1198 }
1199
1200 /* converts an ieee single/binary32 to a float */
1201 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1202 ecb_function_ float
1203 ecb_binary32_to_float (uint32_t x)
1204 {
1205 float r;
1206
1207 #if ECB_STDFP
1208 memcpy (&r, &x, 4);
1209 #else
1210 /* emulation, only works for normals and subnormals and +0 */
1211 int neg = x >> 31;
1212 int e = (x >> 23) & 0xffU;
1213
1214 x &= 0x7fffffU;
1215
1216 if (e)
1217 x |= 0x800000U;
1218 else
1219 e = 1;
1220
1221 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1222 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1223
1224 r = neg ? -r : r;
1225 #endif
1226
1227 return r;
1228 }
1229
1230 /* convert a double to ieee double/binary64 */
1231 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1232 ecb_function_ uint64_t
1233 ecb_double_to_binary64 (double x)
1234 {
1235 uint64_t r;
1236
1237 #if ECB_STDFP
1238 memcpy (&r, &x, 8);
1239 #else
1240 /* slow emulation, works for anything but -0 */
1241 uint64_t m;
1242 int e;
1243
1244 if (x == 0e0 ) return 0x0000000000000000U;
1245 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1246 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1247 if (x != x ) return 0X7ff7ffffffffffffU;
1248
1249 m = frexp (x, &e) * 0x20000000000000U;
1250
1251 r = m & 0x8000000000000000;;
1252
1253 if (r)
1254 m = -m;
1255
1256 if (e <= -1022)
1257 {
1258 m &= 0x1fffffffffffffU;
1259 m >>= (-1021 - e);
1260 e = -1022;
1261 }
1262
1263 r |= ((uint64_t)(e + 1022)) << 52;
1264 r |= m & 0xfffffffffffffU;
1265 #endif
1266
1267 return r;
1268 }
1269
1270 /* converts an ieee double/binary64 to a double */
1271 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1272 ecb_function_ double
1273 ecb_binary64_to_double (uint64_t x)
1274 {
1275 double r;
1276
1277 #if ECB_STDFP
1278 memcpy (&r, &x, 8);
1279 #else
1280 /* emulation, only works for normals and subnormals and +0 */
1281 int neg = x >> 63;
1282 int e = (x >> 52) & 0x7ffU;
1283
1284 x &= 0xfffffffffffffU;
1285
1286 if (e)
1287 x |= 0x10000000000000U;
1288 else
1289 e = 1;
1290
1291 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1292 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1293
1294 r = neg ? -r : r;
1295 #endif
1296
1297 return r;
1298 }
1299
1300#endif
1301
1302#endif
1303
1304/* ECB.H END */
1305
1306#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1307/* if your architecture doesn't need memory fences, e.g. because it is
1308 * single-cpu/core, or if you use libev in a project that doesn't use libev
1309 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1310 * libev, in which cases the memory fences become nops.
1311 * alternatively, you can remove this #error and link against libpthread,
1312 * which will then provide the memory fences.
1313 */
1314# error "memory fences not defined for your architecture, please report"
1315#endif
1316
1317#ifndef ECB_MEMORY_FENCE
1318# define ECB_MEMORY_FENCE do { } while (0)
1319# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1320# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1321#endif
1322
1323#define expect_false(cond) ecb_expect_false (cond)
1324#define expect_true(cond) ecb_expect_true (cond)
1325#define noinline ecb_noinline
1326
1327#define inline_size ecb_inline
1328
1329#if EV_FEATURE_CODE
1330# define inline_speed ecb_inline
1331#else
1332# define inline_speed static noinline
1333#endif
1334
1335#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1336
1337#if EV_MINPRI == EV_MAXPRI
1338# define ABSPRI(w) (((W)w), 0)
1339#else
1340# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1341#endif
1342
1343#define EMPTY /* required for microsofts broken pseudo-c compiler */
1344#define EMPTY2(a,b) /* used to suppress some warnings */
1345
1346typedef ev_watcher *W;
1347typedef ev_watcher_list *WL;
1348typedef ev_watcher_time *WT;
1349
1350#define ev_active(w) ((W)(w))->active
1351#define ev_at(w) ((WT)(w))->at
1352
1353#if EV_USE_REALTIME
1354/* sig_atomic_t is used to avoid per-thread variables or locking but still */
1355/* giving it a reasonably high chance of working on typical architectures */
1356static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1357#endif
1358
1359#if EV_USE_MONOTONIC
1360static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1361#endif
1362
1363#ifndef EV_FD_TO_WIN32_HANDLE
1364# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1365#endif
1366#ifndef EV_WIN32_HANDLE_TO_FD
1367# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1368#endif
1369#ifndef EV_WIN32_CLOSE_FD
1370# define EV_WIN32_CLOSE_FD(fd) close (fd)
1371#endif
1372
1373#ifdef _WIN32
1374# include "ev_win32.c"
1375#endif
1376
1377/*****************************************************************************/
1378
1379/* define a suitable floor function (only used by periodics atm) */
1380
1381#if EV_USE_FLOOR
1382# include <math.h>
1383# define ev_floor(v) floor (v)
1384#else
1385
1386#include <float.h>
1387
1388/* a floor() replacement function, should be independent of ev_tstamp type */
1389static ev_tstamp noinline
1390ev_floor (ev_tstamp v)
1391{
1392 /* the choice of shift factor is not terribly important */
1393#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1394 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1395#else
1396 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1397#endif
1398
1399 /* argument too large for an unsigned long? */
1400 if (expect_false (v >= shift))
1401 {
1402 ev_tstamp f;
1403
1404 if (v == v - 1.)
1405 return v; /* very large number */
1406
1407 f = shift * ev_floor (v * (1. / shift));
1408 return f + ev_floor (v - f);
1409 }
1410
1411 /* special treatment for negative args? */
1412 if (expect_false (v < 0.))
1413 {
1414 ev_tstamp f = -ev_floor (-v);
1415
1416 return f - (f == v ? 0 : 1);
1417 }
1418
1419 /* fits into an unsigned long */
1420 return (unsigned long)v;
1421}
1422
1423#endif
1424
1425/*****************************************************************************/
1426
1427#ifdef __linux
1428# include <sys/utsname.h>
1429#endif
1430
1431static unsigned int noinline ecb_cold
1432ev_linux_version (void)
1433{
1434#ifdef __linux
1435 unsigned int v = 0;
1436 struct utsname buf;
1437 int i;
1438 char *p = buf.release;
1439
1440 if (uname (&buf))
1441 return 0;
1442
1443 for (i = 3+1; --i; )
1444 {
1445 unsigned int c = 0;
1446
1447 for (;;)
1448 {
1449 if (*p >= '0' && *p <= '9')
1450 c = c * 10 + *p++ - '0';
1451 else
1452 {
1453 p += *p == '.';
1454 break;
1455 }
1456 }
1457
1458 v = (v << 8) | c;
1459 }
1460
1461 return v;
1462#else
1463 return 0;
1464#endif
1465}
1466
1467/*****************************************************************************/
1468
1469#if EV_AVOID_STDIO
1470static void noinline ecb_cold
1471ev_printerr (const char *msg)
1472{
1473 write (STDERR_FILENO, msg, strlen (msg));
1474}
1475#endif
1476
1477static void (*syserr_cb)(const char *msg) EV_THROW;
1478
1479void ecb_cold
1480ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
1481{
1482 syserr_cb = cb;
1483}
1484
1485static void noinline ecb_cold
1486ev_syserr (const char *msg)
1487{
1488 if (!msg)
1489 msg = "(libev) system error";
1490
1491 if (syserr_cb)
1492 syserr_cb (msg);
1493 else
1494 {
1495#if EV_AVOID_STDIO
1496 ev_printerr (msg);
1497 ev_printerr (": ");
1498 ev_printerr (strerror (errno));
1499 ev_printerr ("\n");
1500#else
1501 perror (msg);
1502#endif
1503 abort ();
1504 }
1505}
1506
1507static void *
1508ev_realloc_emul (void *ptr, long size) EV_THROW
1509{
1510 /* some systems, notably openbsd and darwin, fail to properly
1511 * implement realloc (x, 0) (as required by both ansi c-89 and
1512 * the single unix specification, so work around them here.
1513 * recently, also (at least) fedora and debian started breaking it,
1514 * despite documenting it otherwise.
1515 */
1516
1517 if (size)
1518 return realloc (ptr, size);
1519
1520 free (ptr);
1521 return 0;
1522}
1523
1524static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
1525
1526void ecb_cold
1527ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
1528{
1529 alloc = cb;
1530}
1531
1532inline_speed void *
1533ev_realloc (void *ptr, long size)
1534{
1535 ptr = alloc (ptr, size);
1536
1537 if (!ptr && size)
1538 {
1539#if EV_AVOID_STDIO
1540 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1541#else
1542 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1543#endif
1544 abort ();
1545 }
1546
1547 return ptr;
1548}
1549
1550#define ev_malloc(size) ev_realloc (0, (size))
1551#define ev_free(ptr) ev_realloc ((ptr), 0)
1552
1553/*****************************************************************************/
1554
1555/* set in reify when reification needed */
1556#define EV_ANFD_REIFY 1
1557
1558/* file descriptor info structure */
1559typedef struct
1560{
1561 WL head;
1562 unsigned char events; /* the events watched for */
1563 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1564 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
1565 unsigned char unused;
1566#if EV_USE_EPOLL
1567 unsigned int egen; /* generation counter to counter epoll bugs */
1568#endif
1569#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1570 SOCKET handle;
1571#endif
1572#if EV_USE_IOCP
1573 OVERLAPPED or, ow;
1574#endif
1575} ANFD;
1576
1577/* stores the pending event set for a given watcher */
1578typedef struct
1579{
1580 W w;
1581 int events; /* the pending event set for the given watcher */
1582} ANPENDING;
1583
1584#if EV_USE_INOTIFY
1585/* hash table entry per inotify-id */
1586typedef struct
1587{
1588 WL head;
1589} ANFS;
1590#endif
1591
1592/* Heap Entry */
1593#if EV_HEAP_CACHE_AT
1594 /* a heap element */
1595 typedef struct {
1596 ev_tstamp at;
1597 WT w;
1598 } ANHE;
1599
1600 #define ANHE_w(he) (he).w /* access watcher, read-write */
1601 #define ANHE_at(he) (he).at /* access cached at, read-only */
1602 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1603#else
1604 /* a heap element */
1605 typedef WT ANHE;
1606
1607 #define ANHE_w(he) (he)
1608 #define ANHE_at(he) (he)->at
1609 #define ANHE_at_cache(he)
1610#endif
1611
1612#if EV_MULTIPLICITY
1613
1614 struct ev_loop
1615 {
1616 ev_tstamp ev_rt_now;
1617 #define ev_rt_now ((loop)->ev_rt_now)
1618 #define VAR(name,decl) decl;
1619 #include "ev_vars.h"
1620 #undef VAR
1621 };
1622 #include "ev_wrap.h"
1623
1624 static struct ev_loop default_loop_struct;
1625 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
1626
1627#else
1628
1629 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
1630 #define VAR(name,decl) static decl;
1631 #include "ev_vars.h"
1632 #undef VAR
1633
1634 static int ev_default_loop_ptr;
1635
1636#endif
1637
1638#if EV_FEATURE_API
1639# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1640# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1641# define EV_INVOKE_PENDING invoke_cb (EV_A)
1642#else
1643# define EV_RELEASE_CB (void)0
1644# define EV_ACQUIRE_CB (void)0
1645# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1646#endif
1647
1648#define EVBREAK_RECURSE 0x80
1649
1650/*****************************************************************************/
1651
1652#ifndef EV_HAVE_EV_TIME
130ev_tstamp 1653ev_tstamp
131ev_time (void) 1654ev_time (void) EV_THROW
132{ 1655{
133#if EV_USE_REALTIME 1656#if EV_USE_REALTIME
1657 if (expect_true (have_realtime))
1658 {
134 struct timespec ts; 1659 struct timespec ts;
135 clock_gettime (CLOCK_REALTIME, &ts); 1660 clock_gettime (CLOCK_REALTIME, &ts);
136 return ts.tv_sec + ts.tv_nsec * 1e-9; 1661 return ts.tv_sec + ts.tv_nsec * 1e-9;
137#else 1662 }
1663#endif
1664
138 struct timeval tv; 1665 struct timeval tv;
139 gettimeofday (&tv, 0); 1666 gettimeofday (&tv, 0);
140 return tv.tv_sec + tv.tv_usec * 1e-6; 1667 return tv.tv_sec + tv.tv_usec * 1e-6;
141#endif
142} 1668}
1669#endif
143 1670
144static ev_tstamp 1671inline_size ev_tstamp
145get_clock (void) 1672get_clock (void)
146{ 1673{
147#if EV_USE_MONOTONIC 1674#if EV_USE_MONOTONIC
148 if (expect_true (have_monotonic)) 1675 if (expect_true (have_monotonic))
149 { 1676 {
… …
154#endif 1681#endif
155 1682
156 return ev_time (); 1683 return ev_time ();
157} 1684}
158 1685
159#define array_roundsize(base,n) ((n) | 4 & ~3) 1686#if EV_MULTIPLICITY
1687ev_tstamp
1688ev_now (EV_P) EV_THROW
1689{
1690 return ev_rt_now;
1691}
1692#endif
160 1693
161#define array_needsize(base,cur,cnt,init) \ 1694void
162 if (expect_false ((cnt) > cur)) \ 1695ev_sleep (ev_tstamp delay) EV_THROW
163 { \ 1696{
164 int newcnt = cur; \ 1697 if (delay > 0.)
165 do \
166 { \
167 newcnt = array_roundsize (base, newcnt << 1); \
168 } \
169 while ((cnt) > newcnt); \
170 \
171 base = realloc (base, sizeof (*base) * (newcnt)); \
172 init (base + cur, newcnt - cur); \
173 cur = newcnt; \
174 } 1698 {
1699#if EV_USE_NANOSLEEP
1700 struct timespec ts;
1701
1702 EV_TS_SET (ts, delay);
1703 nanosleep (&ts, 0);
1704#elif defined _WIN32
1705 Sleep ((unsigned long)(delay * 1e3));
1706#else
1707 struct timeval tv;
1708
1709 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1710 /* something not guaranteed by newer posix versions, but guaranteed */
1711 /* by older ones */
1712 EV_TV_SET (tv, delay);
1713 select (0, 0, 0, 0, &tv);
1714#endif
1715 }
1716}
175 1717
176/*****************************************************************************/ 1718/*****************************************************************************/
177 1719
178typedef struct 1720#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
179{
180 struct ev_io *head;
181 unsigned char events;
182 unsigned char reify;
183} ANFD;
184 1721
185static ANFD *anfds; 1722/* find a suitable new size for the given array, */
186static int anfdmax; 1723/* hopefully by rounding to a nice-to-malloc size */
187 1724inline_size int
188static void 1725array_nextsize (int elem, int cur, int cnt)
189anfds_init (ANFD *base, int count)
190{ 1726{
191 while (count--) 1727 int ncur = cur + 1;
192 {
193 base->head = 0;
194 base->events = EV_NONE;
195 base->reify = 0;
196 1728
197 ++base; 1729 do
1730 ncur <<= 1;
1731 while (cnt > ncur);
1732
1733 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
1734 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
198 } 1735 {
199} 1736 ncur *= elem;
200 1737 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
201typedef struct 1738 ncur = ncur - sizeof (void *) * 4;
202{ 1739 ncur /= elem;
203 W w;
204 int events;
205} ANPENDING;
206
207static ANPENDING *pendings [NUMPRI];
208static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
209
210static void
211event (W w, int events)
212{
213 if (w->pending)
214 { 1740 }
1741
1742 return ncur;
1743}
1744
1745static void * noinline ecb_cold
1746array_realloc (int elem, void *base, int *cur, int cnt)
1747{
1748 *cur = array_nextsize (elem, *cur, cnt);
1749 return ev_realloc (base, elem * *cur);
1750}
1751
1752#define array_init_zero(base,count) \
1753 memset ((void *)(base), 0, sizeof (*(base)) * (count))
1754
1755#define array_needsize(type,base,cur,cnt,init) \
1756 if (expect_false ((cnt) > (cur))) \
1757 { \
1758 int ecb_unused ocur_ = (cur); \
1759 (base) = (type *)array_realloc \
1760 (sizeof (type), (base), &(cur), (cnt)); \
1761 init ((base) + (ocur_), (cur) - ocur_); \
1762 }
1763
1764#if 0
1765#define array_slim(type,stem) \
1766 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
1767 { \
1768 stem ## max = array_roundsize (stem ## cnt >> 1); \
1769 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
1770 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
1771 }
1772#endif
1773
1774#define array_free(stem, idx) \
1775 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
1776
1777/*****************************************************************************/
1778
1779/* dummy callback for pending events */
1780static void noinline
1781pendingcb (EV_P_ ev_prepare *w, int revents)
1782{
1783}
1784
1785void noinline
1786ev_feed_event (EV_P_ void *w, int revents) EV_THROW
1787{
1788 W w_ = (W)w;
1789 int pri = ABSPRI (w_);
1790
1791 if (expect_false (w_->pending))
1792 pendings [pri][w_->pending - 1].events |= revents;
1793 else
1794 {
1795 w_->pending = ++pendingcnt [pri];
1796 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1797 pendings [pri][w_->pending - 1].w = w_;
215 pendings [ABSPRI (w)][w->pending - 1].events |= events; 1798 pendings [pri][w_->pending - 1].events = revents;
216 return;
217 } 1799 }
218 1800
219 w->pending = ++pendingcnt [ABSPRI (w)]; 1801 pendingpri = NUMPRI - 1;
220 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
221 pendings [ABSPRI (w)][w->pending - 1].w = w;
222 pendings [ABSPRI (w)][w->pending - 1].events = events;
223} 1802}
224 1803
225static void 1804inline_speed void
1805feed_reverse (EV_P_ W w)
1806{
1807 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1808 rfeeds [rfeedcnt++] = w;
1809}
1810
1811inline_size void
1812feed_reverse_done (EV_P_ int revents)
1813{
1814 do
1815 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1816 while (rfeedcnt);
1817}
1818
1819inline_speed void
226queue_events (W *events, int eventcnt, int type) 1820queue_events (EV_P_ W *events, int eventcnt, int type)
227{ 1821{
228 int i; 1822 int i;
229 1823
230 for (i = 0; i < eventcnt; ++i) 1824 for (i = 0; i < eventcnt; ++i)
231 event (events [i], type); 1825 ev_feed_event (EV_A_ events [i], type);
232} 1826}
233 1827
234static void 1828/*****************************************************************************/
1829
1830inline_speed void
235fd_event (int fd, int events) 1831fd_event_nocheck (EV_P_ int fd, int revents)
236{ 1832{
237 ANFD *anfd = anfds + fd; 1833 ANFD *anfd = anfds + fd;
238 struct ev_io *w; 1834 ev_io *w;
239 1835
240 for (w = anfd->head; w; w = w->next) 1836 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
241 { 1837 {
242 int ev = w->events & events; 1838 int ev = w->events & revents;
243 1839
244 if (ev) 1840 if (ev)
245 event ((W)w, ev); 1841 ev_feed_event (EV_A_ (W)w, ev);
246 } 1842 }
247} 1843}
248 1844
249/*****************************************************************************/ 1845/* do not submit kernel events for fds that have reify set */
1846/* because that means they changed while we were polling for new events */
1847inline_speed void
1848fd_event (EV_P_ int fd, int revents)
1849{
1850 ANFD *anfd = anfds + fd;
250 1851
251static int *fdchanges; 1852 if (expect_true (!anfd->reify))
252static int fdchangemax, fdchangecnt; 1853 fd_event_nocheck (EV_A_ fd, revents);
1854}
253 1855
254static void 1856void
255fd_reify (void) 1857ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
1858{
1859 if (fd >= 0 && fd < anfdmax)
1860 fd_event_nocheck (EV_A_ fd, revents);
1861}
1862
1863/* make sure the external fd watch events are in-sync */
1864/* with the kernel/libev internal state */
1865inline_size void
1866fd_reify (EV_P)
256{ 1867{
257 int i; 1868 int i;
258 1869
1870#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
259 for (i = 0; i < fdchangecnt; ++i) 1871 for (i = 0; i < fdchangecnt; ++i)
260 { 1872 {
261 int fd = fdchanges [i]; 1873 int fd = fdchanges [i];
262 ANFD *anfd = anfds + fd; 1874 ANFD *anfd = anfds + fd;
263 struct ev_io *w;
264 1875
265 int events = 0; 1876 if (anfd->reify & EV__IOFDSET && anfd->head)
266
267 for (w = anfd->head; w; w = w->next)
268 events |= w->events;
269
270 anfd->reify = 0;
271
272 if (anfd->events != events)
273 { 1877 {
1878 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1879
1880 if (handle != anfd->handle)
1881 {
1882 unsigned long arg;
1883
1884 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1885
1886 /* handle changed, but fd didn't - we need to do it in two steps */
274 method_modify (fd, anfd->events, events); 1887 backend_modify (EV_A_ fd, anfd->events, 0);
275 anfd->events = events; 1888 anfd->events = 0;
1889 anfd->handle = handle;
1890 }
276 } 1891 }
277 } 1892 }
1893#endif
1894
1895 for (i = 0; i < fdchangecnt; ++i)
1896 {
1897 int fd = fdchanges [i];
1898 ANFD *anfd = anfds + fd;
1899 ev_io *w;
1900
1901 unsigned char o_events = anfd->events;
1902 unsigned char o_reify = anfd->reify;
1903
1904 anfd->reify = 0;
1905
1906 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1907 {
1908 anfd->events = 0;
1909
1910 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1911 anfd->events |= (unsigned char)w->events;
1912
1913 if (o_events != anfd->events)
1914 o_reify = EV__IOFDSET; /* actually |= */
1915 }
1916
1917 if (o_reify & EV__IOFDSET)
1918 backend_modify (EV_A_ fd, o_events, anfd->events);
1919 }
278 1920
279 fdchangecnt = 0; 1921 fdchangecnt = 0;
280} 1922}
281 1923
282static void 1924/* something about the given fd changed */
283fd_change (int fd) 1925inline_size void
1926fd_change (EV_P_ int fd, int flags)
284{ 1927{
285 if (anfds [fd].reify || fdchangecnt < 0) 1928 unsigned char reify = anfds [fd].reify;
286 return;
287
288 anfds [fd].reify = 1; 1929 anfds [fd].reify |= flags;
289 1930
1931 if (expect_true (!reify))
1932 {
290 ++fdchangecnt; 1933 ++fdchangecnt;
291 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1934 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
292 fdchanges [fdchangecnt - 1] = fd; 1935 fdchanges [fdchangecnt - 1] = fd;
1936 }
293} 1937}
294 1938
295static void 1939/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1940inline_speed void ecb_cold
296fd_kill (int fd) 1941fd_kill (EV_P_ int fd)
297{ 1942{
298 struct ev_io *w; 1943 ev_io *w;
299 1944
300 printf ("killing fd %d\n", fd);//D
301 while ((w = anfds [fd].head)) 1945 while ((w = (ev_io *)anfds [fd].head))
302 { 1946 {
303 ev_io_stop (w); 1947 ev_io_stop (EV_A_ w);
304 event ((W)w, EV_ERROR | EV_READ | EV_WRITE); 1948 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
305 } 1949 }
1950}
1951
1952/* check whether the given fd is actually valid, for error recovery */
1953inline_size int ecb_cold
1954fd_valid (int fd)
1955{
1956#ifdef _WIN32
1957 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1958#else
1959 return fcntl (fd, F_GETFD) != -1;
1960#endif
306} 1961}
307 1962
308/* called on EBADF to verify fds */ 1963/* called on EBADF to verify fds */
309static void 1964static void noinline ecb_cold
310fd_ebadf (void) 1965fd_ebadf (EV_P)
311{ 1966{
312 int fd; 1967 int fd;
313 1968
314 for (fd = 0; fd < anfdmax; ++fd) 1969 for (fd = 0; fd < anfdmax; ++fd)
315 if (anfds [fd].events) 1970 if (anfds [fd].events)
316 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 1971 if (!fd_valid (fd) && errno == EBADF)
317 fd_kill (fd); 1972 fd_kill (EV_A_ fd);
318} 1973}
319 1974
320/* called on ENOMEM in select/poll to kill some fds and retry */ 1975/* called on ENOMEM in select/poll to kill some fds and retry */
321static void 1976static void noinline ecb_cold
322fd_enomem (void) 1977fd_enomem (EV_P)
323{ 1978{
324 int fd = anfdmax; 1979 int fd;
325 1980
326 while (fd--) 1981 for (fd = anfdmax; fd--; )
327 if (anfds [fd].events) 1982 if (anfds [fd].events)
328 { 1983 {
329 close (fd);
330 fd_kill (fd); 1984 fd_kill (EV_A_ fd);
331 return; 1985 break;
332 } 1986 }
333} 1987}
334 1988
1989/* usually called after fork if backend needs to re-arm all fds from scratch */
1990static void noinline
1991fd_rearm_all (EV_P)
1992{
1993 int fd;
1994
1995 for (fd = 0; fd < anfdmax; ++fd)
1996 if (anfds [fd].events)
1997 {
1998 anfds [fd].events = 0;
1999 anfds [fd].emask = 0;
2000 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
2001 }
2002}
2003
2004/* used to prepare libev internal fd's */
2005/* this is not fork-safe */
2006inline_speed void
2007fd_intern (int fd)
2008{
2009#ifdef _WIN32
2010 unsigned long arg = 1;
2011 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
2012#else
2013 fcntl (fd, F_SETFD, FD_CLOEXEC);
2014 fcntl (fd, F_SETFL, O_NONBLOCK);
2015#endif
2016}
2017
335/*****************************************************************************/ 2018/*****************************************************************************/
336 2019
337static struct ev_timer **timers; 2020/*
338static int timermax, timercnt; 2021 * the heap functions want a real array index. array index 0 is guaranteed to not
2022 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
2023 * the branching factor of the d-tree.
2024 */
339 2025
340static struct ev_periodic **periodics; 2026/*
341static int periodicmax, periodiccnt; 2027 * at the moment we allow libev the luxury of two heaps,
2028 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
2029 * which is more cache-efficient.
2030 * the difference is about 5% with 50000+ watchers.
2031 */
2032#if EV_USE_4HEAP
342 2033
2034#define DHEAP 4
2035#define HEAP0 (DHEAP - 1) /* index of first element in heap */
2036#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
2037#define UPHEAP_DONE(p,k) ((p) == (k))
2038
2039/* away from the root */
2040inline_speed void
2041downheap (ANHE *heap, int N, int k)
2042{
2043 ANHE he = heap [k];
2044 ANHE *E = heap + N + HEAP0;
2045
2046 for (;;)
2047 {
2048 ev_tstamp minat;
2049 ANHE *minpos;
2050 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
2051
2052 /* find minimum child */
2053 if (expect_true (pos + DHEAP - 1 < E))
2054 {
2055 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2056 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2057 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2058 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2059 }
2060 else if (pos < E)
2061 {
2062 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2063 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2064 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2065 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2066 }
2067 else
2068 break;
2069
2070 if (ANHE_at (he) <= minat)
2071 break;
2072
2073 heap [k] = *minpos;
2074 ev_active (ANHE_w (*minpos)) = k;
2075
2076 k = minpos - heap;
2077 }
2078
2079 heap [k] = he;
2080 ev_active (ANHE_w (he)) = k;
2081}
2082
2083#else /* 4HEAP */
2084
2085#define HEAP0 1
2086#define HPARENT(k) ((k) >> 1)
2087#define UPHEAP_DONE(p,k) (!(p))
2088
2089/* away from the root */
2090inline_speed void
2091downheap (ANHE *heap, int N, int k)
2092{
2093 ANHE he = heap [k];
2094
2095 for (;;)
2096 {
2097 int c = k << 1;
2098
2099 if (c >= N + HEAP0)
2100 break;
2101
2102 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
2103 ? 1 : 0;
2104
2105 if (ANHE_at (he) <= ANHE_at (heap [c]))
2106 break;
2107
2108 heap [k] = heap [c];
2109 ev_active (ANHE_w (heap [k])) = k;
2110
2111 k = c;
2112 }
2113
2114 heap [k] = he;
2115 ev_active (ANHE_w (he)) = k;
2116}
2117#endif
2118
2119/* towards the root */
2120inline_speed void
2121upheap (ANHE *heap, int k)
2122{
2123 ANHE he = heap [k];
2124
2125 for (;;)
2126 {
2127 int p = HPARENT (k);
2128
2129 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
2130 break;
2131
2132 heap [k] = heap [p];
2133 ev_active (ANHE_w (heap [k])) = k;
2134 k = p;
2135 }
2136
2137 heap [k] = he;
2138 ev_active (ANHE_w (he)) = k;
2139}
2140
2141/* move an element suitably so it is in a correct place */
2142inline_size void
2143adjustheap (ANHE *heap, int N, int k)
2144{
2145 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
2146 upheap (heap, k);
2147 else
2148 downheap (heap, N, k);
2149}
2150
2151/* rebuild the heap: this function is used only once and executed rarely */
2152inline_size void
2153reheap (ANHE *heap, int N)
2154{
2155 int i;
2156
2157 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
2158 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
2159 for (i = 0; i < N; ++i)
2160 upheap (heap, i + HEAP0);
2161}
2162
2163/*****************************************************************************/
2164
2165/* associate signal watchers to a signal signal */
2166typedef struct
2167{
2168 EV_ATOMIC_T pending;
2169#if EV_MULTIPLICITY
2170 EV_P;
2171#endif
2172 WL head;
2173} ANSIG;
2174
2175static ANSIG signals [EV_NSIG - 1];
2176
2177/*****************************************************************************/
2178
2179#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2180
2181static void noinline ecb_cold
2182evpipe_init (EV_P)
2183{
2184 if (!ev_is_active (&pipe_w))
2185 {
2186 int fds [2];
2187
2188# if EV_USE_EVENTFD
2189 fds [0] = -1;
2190 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2191 if (fds [1] < 0 && errno == EINVAL)
2192 fds [1] = eventfd (0, 0);
2193
2194 if (fds [1] < 0)
2195# endif
2196 {
2197 while (pipe (fds))
2198 ev_syserr ("(libev) error creating signal/async pipe");
2199
2200 fd_intern (fds [0]);
2201 }
2202
2203 evpipe [0] = fds [0];
2204
2205 if (evpipe [1] < 0)
2206 evpipe [1] = fds [1]; /* first call, set write fd */
2207 else
2208 {
2209 /* on subsequent calls, do not change evpipe [1] */
2210 /* so that evpipe_write can always rely on its value. */
2211 /* this branch does not do anything sensible on windows, */
2212 /* so must not be executed on windows */
2213
2214 dup2 (fds [1], evpipe [1]);
2215 close (fds [1]);
2216 }
2217
2218 fd_intern (evpipe [1]);
2219
2220 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2221 ev_io_start (EV_A_ &pipe_w);
2222 ev_unref (EV_A); /* watcher should not keep loop alive */
2223 }
2224}
2225
2226inline_speed void
2227evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2228{
2229 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2230
2231 if (expect_true (*flag))
2232 return;
2233
2234 *flag = 1;
2235 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2236
2237 pipe_write_skipped = 1;
2238
2239 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2240
2241 if (pipe_write_wanted)
2242 {
2243 int old_errno;
2244
2245 pipe_write_skipped = 0;
2246 ECB_MEMORY_FENCE_RELEASE;
2247
2248 old_errno = errno; /* save errno because write will clobber it */
2249
2250#if EV_USE_EVENTFD
2251 if (evpipe [0] < 0)
2252 {
2253 uint64_t counter = 1;
2254 write (evpipe [1], &counter, sizeof (uint64_t));
2255 }
2256 else
2257#endif
2258 {
2259#ifdef _WIN32
2260 WSABUF buf;
2261 DWORD sent;
2262 buf.buf = &buf;
2263 buf.len = 1;
2264 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2265#else
2266 write (evpipe [1], &(evpipe [1]), 1);
2267#endif
2268 }
2269
2270 errno = old_errno;
2271 }
2272}
2273
2274/* called whenever the libev signal pipe */
2275/* got some events (signal, async) */
343static void 2276static void
344upheap (WT *timers, int k) 2277pipecb (EV_P_ ev_io *iow, int revents)
345{ 2278{
346 WT w = timers [k]; 2279 int i;
347 2280
348 while (k && timers [k >> 1]->at > w->at) 2281 if (revents & EV_READ)
349 {
350 timers [k] = timers [k >> 1];
351 timers [k]->active = k + 1;
352 k >>= 1;
353 } 2282 {
2283#if EV_USE_EVENTFD
2284 if (evpipe [0] < 0)
2285 {
2286 uint64_t counter;
2287 read (evpipe [1], &counter, sizeof (uint64_t));
2288 }
2289 else
2290#endif
2291 {
2292 char dummy[4];
2293#ifdef _WIN32
2294 WSABUF buf;
2295 DWORD recvd;
2296 DWORD flags = 0;
2297 buf.buf = dummy;
2298 buf.len = sizeof (dummy);
2299 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2300#else
2301 read (evpipe [0], &dummy, sizeof (dummy));
2302#endif
2303 }
2304 }
354 2305
355 timers [k] = w; 2306 pipe_write_skipped = 0;
356 timers [k]->active = k + 1;
357 2307
2308 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2309
2310#if EV_SIGNAL_ENABLE
2311 if (sig_pending)
2312 {
2313 sig_pending = 0;
2314
2315 ECB_MEMORY_FENCE;
2316
2317 for (i = EV_NSIG - 1; i--; )
2318 if (expect_false (signals [i].pending))
2319 ev_feed_signal_event (EV_A_ i + 1);
2320 }
2321#endif
2322
2323#if EV_ASYNC_ENABLE
2324 if (async_pending)
2325 {
2326 async_pending = 0;
2327
2328 ECB_MEMORY_FENCE;
2329
2330 for (i = asynccnt; i--; )
2331 if (asyncs [i]->sent)
2332 {
2333 asyncs [i]->sent = 0;
2334 ECB_MEMORY_FENCE_RELEASE;
2335 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
2336 }
2337 }
2338#endif
2339}
2340
2341/*****************************************************************************/
2342
2343void
2344ev_feed_signal (int signum) EV_THROW
2345{
2346#if EV_MULTIPLICITY
2347 EV_P;
2348 ECB_MEMORY_FENCE_ACQUIRE;
2349 EV_A = signals [signum - 1].loop;
2350
2351 if (!EV_A)
2352 return;
2353#endif
2354
2355 signals [signum - 1].pending = 1;
2356 evpipe_write (EV_A_ &sig_pending);
358} 2357}
359 2358
360static void 2359static void
361downheap (WT *timers, int N, int k) 2360ev_sighandler (int signum)
362{ 2361{
363 WT w = timers [k]; 2362#ifdef _WIN32
2363 signal (signum, ev_sighandler);
2364#endif
364 2365
365 while (k < (N >> 1)) 2366 ev_feed_signal (signum);
366 { 2367}
367 int j = k << 1;
368 2368
369 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 2369void noinline
370 ++j; 2370ev_feed_signal_event (EV_P_ int signum) EV_THROW
2371{
2372 WL w;
371 2373
372 if (w->at <= timers [j]->at) 2374 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2375 return;
2376
2377 --signum;
2378
2379#if EV_MULTIPLICITY
2380 /* it is permissible to try to feed a signal to the wrong loop */
2381 /* or, likely more useful, feeding a signal nobody is waiting for */
2382
2383 if (expect_false (signals [signum].loop != EV_A))
2384 return;
2385#endif
2386
2387 signals [signum].pending = 0;
2388 ECB_MEMORY_FENCE_RELEASE;
2389
2390 for (w = signals [signum].head; w; w = w->next)
2391 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2392}
2393
2394#if EV_USE_SIGNALFD
2395static void
2396sigfdcb (EV_P_ ev_io *iow, int revents)
2397{
2398 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2399
2400 for (;;)
2401 {
2402 ssize_t res = read (sigfd, si, sizeof (si));
2403
2404 /* not ISO-C, as res might be -1, but works with SuS */
2405 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2406 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2407
2408 if (res < (ssize_t)sizeof (si))
373 break; 2409 break;
374
375 timers [k] = timers [j];
376 timers [k]->active = k + 1;
377 k = j;
378 } 2410 }
379
380 timers [k] = w;
381 timers [k]->active = k + 1;
382} 2411}
2412#endif
2413
2414#endif
383 2415
384/*****************************************************************************/ 2416/*****************************************************************************/
385 2417
386typedef struct 2418#if EV_CHILD_ENABLE
387{ 2419static WL childs [EV_PID_HASHSIZE];
388 struct ev_signal *head;
389 sig_atomic_t volatile gotsig;
390} ANSIG;
391 2420
392static ANSIG *signals;
393static int signalmax;
394
395static int sigpipe [2];
396static sig_atomic_t volatile gotsig;
397static struct ev_io sigev;
398
399static void
400signals_init (ANSIG *base, int count)
401{
402 while (count--)
403 {
404 base->head = 0;
405 base->gotsig = 0;
406
407 ++base;
408 }
409}
410
411static void
412sighandler (int signum)
413{
414 signals [signum - 1].gotsig = 1;
415
416 if (!gotsig)
417 {
418 gotsig = 1;
419 write (sigpipe [1], &signum, 1);
420 }
421}
422
423static void
424sigcb (struct ev_io *iow, int revents)
425{
426 struct ev_signal *w;
427 int signum;
428
429 read (sigpipe [0], &revents, 1);
430 gotsig = 0;
431
432 for (signum = signalmax; signum--; )
433 if (signals [signum].gotsig)
434 {
435 signals [signum].gotsig = 0;
436
437 for (w = signals [signum].head; w; w = w->next)
438 event ((W)w, EV_SIGNAL);
439 }
440}
441
442static void
443siginit (void)
444{
445#ifndef WIN32
446 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
447 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
448
449 /* rather than sort out wether we really need nb, set it */
450 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
451 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
452#endif
453
454 ev_io_set (&sigev, sigpipe [0], EV_READ);
455 ev_io_start (&sigev);
456}
457
458/*****************************************************************************/
459
460static struct ev_idle **idles;
461static int idlemax, idlecnt;
462
463static struct ev_prepare **prepares;
464static int preparemax, preparecnt;
465
466static struct ev_check **checks;
467static int checkmax, checkcnt;
468
469/*****************************************************************************/
470
471static struct ev_child *childs [PID_HASHSIZE];
472static struct ev_signal childev; 2421static ev_signal childev;
473 2422
474#ifndef WIN32 2423#ifndef WIFCONTINUED
2424# define WIFCONTINUED(status) 0
2425#endif
2426
2427/* handle a single child status event */
2428inline_speed void
2429child_reap (EV_P_ int chain, int pid, int status)
2430{
2431 ev_child *w;
2432 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
2433
2434 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2435 {
2436 if ((w->pid == pid || !w->pid)
2437 && (!traced || (w->flags & 1)))
2438 {
2439 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
2440 w->rpid = pid;
2441 w->rstatus = status;
2442 ev_feed_event (EV_A_ (W)w, EV_CHILD);
2443 }
2444 }
2445}
475 2446
476#ifndef WCONTINUED 2447#ifndef WCONTINUED
477# define WCONTINUED 0 2448# define WCONTINUED 0
478#endif 2449#endif
479 2450
2451/* called on sigchld etc., calls waitpid */
480static void 2452static void
481childcb (struct ev_signal *sw, int revents) 2453childcb (EV_P_ ev_signal *sw, int revents)
482{ 2454{
483 struct ev_child *w;
484 int pid, status; 2455 int pid, status;
485 2456
2457 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
486 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 2458 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
487 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 2459 if (!WCONTINUED
488 if (w->pid == pid || !w->pid) 2460 || errno != EINVAL
489 { 2461 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
490 w->status = status; 2462 return;
491 event ((W)w, EV_CHILD); 2463
492 } 2464 /* make sure we are called again until all children have been reaped */
2465 /* we need to do it this way so that the callback gets called before we continue */
2466 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
2467
2468 child_reap (EV_A_ pid, pid, status);
2469 if ((EV_PID_HASHSIZE) > 1)
2470 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
493} 2471}
494 2472
495#endif 2473#endif
496 2474
497/*****************************************************************************/ 2475/*****************************************************************************/
498 2476
2477#if EV_USE_IOCP
2478# include "ev_iocp.c"
2479#endif
2480#if EV_USE_PORT
2481# include "ev_port.c"
2482#endif
499#if EV_USE_KQUEUE 2483#if EV_USE_KQUEUE
500# include "ev_kqueue.c" 2484# include "ev_kqueue.c"
501#endif 2485#endif
502#if EV_USE_EPOLL 2486#if EV_USE_EPOLL
503# include "ev_epoll.c" 2487# include "ev_epoll.c"
… …
507#endif 2491#endif
508#if EV_USE_SELECT 2492#if EV_USE_SELECT
509# include "ev_select.c" 2493# include "ev_select.c"
510#endif 2494#endif
511 2495
512int 2496int ecb_cold
513ev_version_major (void) 2497ev_version_major (void) EV_THROW
514{ 2498{
515 return EV_VERSION_MAJOR; 2499 return EV_VERSION_MAJOR;
516} 2500}
517 2501
518int 2502int ecb_cold
519ev_version_minor (void) 2503ev_version_minor (void) EV_THROW
520{ 2504{
521 return EV_VERSION_MINOR; 2505 return EV_VERSION_MINOR;
522} 2506}
523 2507
524/* return true if we are running with elevated privileges and ignore env variables */ 2508/* return true if we are running with elevated privileges and should ignore env variables */
525static int 2509int inline_size ecb_cold
526enable_secure () 2510enable_secure (void)
527{ 2511{
2512#ifdef _WIN32
2513 return 0;
2514#else
528 return getuid () != geteuid () 2515 return getuid () != geteuid ()
529 || getgid () != getegid (); 2516 || getgid () != getegid ();
2517#endif
530} 2518}
531 2519
532int ev_init (int methods) 2520unsigned int ecb_cold
2521ev_supported_backends (void) EV_THROW
533{ 2522{
534 if (!ev_method) 2523 unsigned int flags = 0;
2524
2525 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2526 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
2527 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2528 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2529 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2530
2531 return flags;
2532}
2533
2534unsigned int ecb_cold
2535ev_recommended_backends (void) EV_THROW
2536{
2537 unsigned int flags = ev_supported_backends ();
2538
2539#ifndef __NetBSD__
2540 /* kqueue is borked on everything but netbsd apparently */
2541 /* it usually doesn't work correctly on anything but sockets and pipes */
2542 flags &= ~EVBACKEND_KQUEUE;
2543#endif
2544#ifdef __APPLE__
2545 /* only select works correctly on that "unix-certified" platform */
2546 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2547 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2548#endif
2549#ifdef __FreeBSD__
2550 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2551#endif
2552
2553 return flags;
2554}
2555
2556unsigned int ecb_cold
2557ev_embeddable_backends (void) EV_THROW
2558{
2559 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2560
2561 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2562 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2563 flags &= ~EVBACKEND_EPOLL;
2564
2565 return flags;
2566}
2567
2568unsigned int
2569ev_backend (EV_P) EV_THROW
2570{
2571 return backend;
2572}
2573
2574#if EV_FEATURE_API
2575unsigned int
2576ev_iteration (EV_P) EV_THROW
2577{
2578 return loop_count;
2579}
2580
2581unsigned int
2582ev_depth (EV_P) EV_THROW
2583{
2584 return loop_depth;
2585}
2586
2587void
2588ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2589{
2590 io_blocktime = interval;
2591}
2592
2593void
2594ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2595{
2596 timeout_blocktime = interval;
2597}
2598
2599void
2600ev_set_userdata (EV_P_ void *data) EV_THROW
2601{
2602 userdata = data;
2603}
2604
2605void *
2606ev_userdata (EV_P) EV_THROW
2607{
2608 return userdata;
2609}
2610
2611void
2612ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
2613{
2614 invoke_cb = invoke_pending_cb;
2615}
2616
2617void
2618ev_set_loop_release_cb (EV_P_ ev_loop_callback EV_THROW release, ev_loop_callback EV_THROW acquire) EV_THROW
2619{
2620 release_cb = release;
2621 acquire_cb = acquire;
2622}
2623#endif
2624
2625/* initialise a loop structure, must be zero-initialised */
2626static void noinline ecb_cold
2627loop_init (EV_P_ unsigned int flags) EV_THROW
2628{
2629 if (!backend)
535 { 2630 {
2631 origflags = flags;
2632
2633#if EV_USE_REALTIME
2634 if (!have_realtime)
2635 {
2636 struct timespec ts;
2637
2638 if (!clock_gettime (CLOCK_REALTIME, &ts))
2639 have_realtime = 1;
2640 }
2641#endif
2642
536#if EV_USE_MONOTONIC 2643#if EV_USE_MONOTONIC
2644 if (!have_monotonic)
2645 {
2646 struct timespec ts;
2647
2648 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
2649 have_monotonic = 1;
2650 }
2651#endif
2652
2653 /* pid check not overridable via env */
2654#ifndef _WIN32
2655 if (flags & EVFLAG_FORKCHECK)
2656 curpid = getpid ();
2657#endif
2658
2659 if (!(flags & EVFLAG_NOENV)
2660 && !enable_secure ()
2661 && getenv ("LIBEV_FLAGS"))
2662 flags = atoi (getenv ("LIBEV_FLAGS"));
2663
2664 ev_rt_now = ev_time ();
2665 mn_now = get_clock ();
2666 now_floor = mn_now;
2667 rtmn_diff = ev_rt_now - mn_now;
2668#if EV_FEATURE_API
2669 invoke_cb = ev_invoke_pending;
2670#endif
2671
2672 io_blocktime = 0.;
2673 timeout_blocktime = 0.;
2674 backend = 0;
2675 backend_fd = -1;
2676 sig_pending = 0;
2677#if EV_ASYNC_ENABLE
2678 async_pending = 0;
2679#endif
2680 pipe_write_skipped = 0;
2681 pipe_write_wanted = 0;
2682 evpipe [0] = -1;
2683 evpipe [1] = -1;
2684#if EV_USE_INOTIFY
2685 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2686#endif
2687#if EV_USE_SIGNALFD
2688 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2689#endif
2690
2691 if (!(flags & EVBACKEND_MASK))
2692 flags |= ev_recommended_backends ();
2693
2694#if EV_USE_IOCP
2695 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2696#endif
2697#if EV_USE_PORT
2698 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
2699#endif
2700#if EV_USE_KQUEUE
2701 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
2702#endif
2703#if EV_USE_EPOLL
2704 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
2705#endif
2706#if EV_USE_POLL
2707 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
2708#endif
2709#if EV_USE_SELECT
2710 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
2711#endif
2712
2713 ev_prepare_init (&pending_w, pendingcb);
2714
2715#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2716 ev_init (&pipe_w, pipecb);
2717 ev_set_priority (&pipe_w, EV_MAXPRI);
2718#endif
2719 }
2720}
2721
2722/* free up a loop structure */
2723void ecb_cold
2724ev_loop_destroy (EV_P)
2725{
2726 int i;
2727
2728#if EV_MULTIPLICITY
2729 /* mimic free (0) */
2730 if (!EV_A)
2731 return;
2732#endif
2733
2734#if EV_CLEANUP_ENABLE
2735 /* queue cleanup watchers (and execute them) */
2736 if (expect_false (cleanupcnt))
2737 {
2738 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2739 EV_INVOKE_PENDING;
2740 }
2741#endif
2742
2743#if EV_CHILD_ENABLE
2744 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2745 {
2746 ev_ref (EV_A); /* child watcher */
2747 ev_signal_stop (EV_A_ &childev);
2748 }
2749#endif
2750
2751 if (ev_is_active (&pipe_w))
2752 {
2753 /*ev_ref (EV_A);*/
2754 /*ev_io_stop (EV_A_ &pipe_w);*/
2755
2756 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2757 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2758 }
2759
2760#if EV_USE_SIGNALFD
2761 if (ev_is_active (&sigfd_w))
2762 close (sigfd);
2763#endif
2764
2765#if EV_USE_INOTIFY
2766 if (fs_fd >= 0)
2767 close (fs_fd);
2768#endif
2769
2770 if (backend_fd >= 0)
2771 close (backend_fd);
2772
2773#if EV_USE_IOCP
2774 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2775#endif
2776#if EV_USE_PORT
2777 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
2778#endif
2779#if EV_USE_KQUEUE
2780 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
2781#endif
2782#if EV_USE_EPOLL
2783 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
2784#endif
2785#if EV_USE_POLL
2786 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
2787#endif
2788#if EV_USE_SELECT
2789 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
2790#endif
2791
2792 for (i = NUMPRI; i--; )
2793 {
2794 array_free (pending, [i]);
2795#if EV_IDLE_ENABLE
2796 array_free (idle, [i]);
2797#endif
2798 }
2799
2800 ev_free (anfds); anfds = 0; anfdmax = 0;
2801
2802 /* have to use the microsoft-never-gets-it-right macro */
2803 array_free (rfeed, EMPTY);
2804 array_free (fdchange, EMPTY);
2805 array_free (timer, EMPTY);
2806#if EV_PERIODIC_ENABLE
2807 array_free (periodic, EMPTY);
2808#endif
2809#if EV_FORK_ENABLE
2810 array_free (fork, EMPTY);
2811#endif
2812#if EV_CLEANUP_ENABLE
2813 array_free (cleanup, EMPTY);
2814#endif
2815 array_free (prepare, EMPTY);
2816 array_free (check, EMPTY);
2817#if EV_ASYNC_ENABLE
2818 array_free (async, EMPTY);
2819#endif
2820
2821 backend = 0;
2822
2823#if EV_MULTIPLICITY
2824 if (ev_is_default_loop (EV_A))
2825#endif
2826 ev_default_loop_ptr = 0;
2827#if EV_MULTIPLICITY
2828 else
2829 ev_free (EV_A);
2830#endif
2831}
2832
2833#if EV_USE_INOTIFY
2834inline_size void infy_fork (EV_P);
2835#endif
2836
2837inline_size void
2838loop_fork (EV_P)
2839{
2840#if EV_USE_PORT
2841 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2842#endif
2843#if EV_USE_KQUEUE
2844 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
2845#endif
2846#if EV_USE_EPOLL
2847 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
2848#endif
2849#if EV_USE_INOTIFY
2850 infy_fork (EV_A);
2851#endif
2852
2853#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2854 if (ev_is_active (&pipe_w))
2855 {
2856 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2857
2858 ev_ref (EV_A);
2859 ev_io_stop (EV_A_ &pipe_w);
2860
2861 if (evpipe [0] >= 0)
2862 EV_WIN32_CLOSE_FD (evpipe [0]);
2863
2864 evpipe_init (EV_A);
2865 /* iterate over everything, in case we missed something before */
2866 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2867 }
2868#endif
2869
2870 postfork = 0;
2871}
2872
2873#if EV_MULTIPLICITY
2874
2875struct ev_loop * ecb_cold
2876ev_loop_new (unsigned int flags) EV_THROW
2877{
2878 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2879
2880 memset (EV_A, 0, sizeof (struct ev_loop));
2881 loop_init (EV_A_ flags);
2882
2883 if (ev_backend (EV_A))
2884 return EV_A;
2885
2886 ev_free (EV_A);
2887 return 0;
2888}
2889
2890#endif /* multiplicity */
2891
2892#if EV_VERIFY
2893static void noinline ecb_cold
2894verify_watcher (EV_P_ W w)
2895{
2896 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2897
2898 if (w->pending)
2899 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2900}
2901
2902static void noinline ecb_cold
2903verify_heap (EV_P_ ANHE *heap, int N)
2904{
2905 int i;
2906
2907 for (i = HEAP0; i < N + HEAP0; ++i)
2908 {
2909 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2910 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2911 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2912
2913 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2914 }
2915}
2916
2917static void noinline ecb_cold
2918array_verify (EV_P_ W *ws, int cnt)
2919{
2920 while (cnt--)
2921 {
2922 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2923 verify_watcher (EV_A_ ws [cnt]);
2924 }
2925}
2926#endif
2927
2928#if EV_FEATURE_API
2929void ecb_cold
2930ev_verify (EV_P) EV_THROW
2931{
2932#if EV_VERIFY
2933 int i;
2934 WL w, w2;
2935
2936 assert (activecnt >= -1);
2937
2938 assert (fdchangemax >= fdchangecnt);
2939 for (i = 0; i < fdchangecnt; ++i)
2940 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2941
2942 assert (anfdmax >= 0);
2943 for (i = 0; i < anfdmax; ++i)
2944 {
2945 int j = 0;
2946
2947 for (w = w2 = anfds [i].head; w; w = w->next)
2948 {
2949 verify_watcher (EV_A_ (W)w);
2950
2951 if (j++ & 1)
2952 {
2953 assert (("libev: io watcher list contains a loop", w != w2));
2954 w2 = w2->next;
2955 }
2956
2957 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2958 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2959 }
2960 }
2961
2962 assert (timermax >= timercnt);
2963 verify_heap (EV_A_ timers, timercnt);
2964
2965#if EV_PERIODIC_ENABLE
2966 assert (periodicmax >= periodiccnt);
2967 verify_heap (EV_A_ periodics, periodiccnt);
2968#endif
2969
2970 for (i = NUMPRI; i--; )
2971 {
2972 assert (pendingmax [i] >= pendingcnt [i]);
2973#if EV_IDLE_ENABLE
2974 assert (idleall >= 0);
2975 assert (idlemax [i] >= idlecnt [i]);
2976 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2977#endif
2978 }
2979
2980#if EV_FORK_ENABLE
2981 assert (forkmax >= forkcnt);
2982 array_verify (EV_A_ (W *)forks, forkcnt);
2983#endif
2984
2985#if EV_CLEANUP_ENABLE
2986 assert (cleanupmax >= cleanupcnt);
2987 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2988#endif
2989
2990#if EV_ASYNC_ENABLE
2991 assert (asyncmax >= asynccnt);
2992 array_verify (EV_A_ (W *)asyncs, asynccnt);
2993#endif
2994
2995#if EV_PREPARE_ENABLE
2996 assert (preparemax >= preparecnt);
2997 array_verify (EV_A_ (W *)prepares, preparecnt);
2998#endif
2999
3000#if EV_CHECK_ENABLE
3001 assert (checkmax >= checkcnt);
3002 array_verify (EV_A_ (W *)checks, checkcnt);
3003#endif
3004
3005# if 0
3006#if EV_CHILD_ENABLE
3007 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
3008 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3009#endif
3010# endif
3011#endif
3012}
3013#endif
3014
3015#if EV_MULTIPLICITY
3016struct ev_loop * ecb_cold
3017#else
3018int
3019#endif
3020ev_default_loop (unsigned int flags) EV_THROW
3021{
3022 if (!ev_default_loop_ptr)
3023 {
3024#if EV_MULTIPLICITY
3025 EV_P = ev_default_loop_ptr = &default_loop_struct;
3026#else
3027 ev_default_loop_ptr = 1;
3028#endif
3029
3030 loop_init (EV_A_ flags);
3031
3032 if (ev_backend (EV_A))
3033 {
3034#if EV_CHILD_ENABLE
3035 ev_signal_init (&childev, childcb, SIGCHLD);
3036 ev_set_priority (&childev, EV_MAXPRI);
3037 ev_signal_start (EV_A_ &childev);
3038 ev_unref (EV_A); /* child watcher should not keep loop alive */
3039#endif
3040 }
3041 else
3042 ev_default_loop_ptr = 0;
3043 }
3044
3045 return ev_default_loop_ptr;
3046}
3047
3048void
3049ev_loop_fork (EV_P) EV_THROW
3050{
3051 postfork = 1;
3052}
3053
3054/*****************************************************************************/
3055
3056void
3057ev_invoke (EV_P_ void *w, int revents)
3058{
3059 EV_CB_INVOKE ((W)w, revents);
3060}
3061
3062unsigned int
3063ev_pending_count (EV_P) EV_THROW
3064{
3065 int pri;
3066 unsigned int count = 0;
3067
3068 for (pri = NUMPRI; pri--; )
3069 count += pendingcnt [pri];
3070
3071 return count;
3072}
3073
3074void noinline
3075ev_invoke_pending (EV_P)
3076{
3077 pendingpri = NUMPRI;
3078
3079 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3080 {
3081 --pendingpri;
3082
3083 while (pendingcnt [pendingpri])
3084 {
3085 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
3086
3087 p->w->pending = 0;
3088 EV_CB_INVOKE (p->w, p->events);
3089 EV_FREQUENT_CHECK;
3090 }
3091 }
3092}
3093
3094#if EV_IDLE_ENABLE
3095/* make idle watchers pending. this handles the "call-idle */
3096/* only when higher priorities are idle" logic */
3097inline_size void
3098idle_reify (EV_P)
3099{
3100 if (expect_false (idleall))
3101 {
3102 int pri;
3103
3104 for (pri = NUMPRI; pri--; )
3105 {
3106 if (pendingcnt [pri])
3107 break;
3108
3109 if (idlecnt [pri])
3110 {
3111 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
3112 break;
3113 }
3114 }
3115 }
3116}
3117#endif
3118
3119/* make timers pending */
3120inline_size void
3121timers_reify (EV_P)
3122{
3123 EV_FREQUENT_CHECK;
3124
3125 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
3126 {
3127 do
3128 {
3129 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
3130
3131 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
3132
3133 /* first reschedule or stop timer */
3134 if (w->repeat)
3135 {
3136 ev_at (w) += w->repeat;
3137 if (ev_at (w) < mn_now)
3138 ev_at (w) = mn_now;
3139
3140 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
3141
3142 ANHE_at_cache (timers [HEAP0]);
3143 downheap (timers, timercnt, HEAP0);
3144 }
3145 else
3146 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
3147
3148 EV_FREQUENT_CHECK;
3149 feed_reverse (EV_A_ (W)w);
3150 }
3151 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
3152
3153 feed_reverse_done (EV_A_ EV_TIMER);
3154 }
3155}
3156
3157#if EV_PERIODIC_ENABLE
3158
3159static void noinline
3160periodic_recalc (EV_P_ ev_periodic *w)
3161{
3162 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3163 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3164
3165 /* the above almost always errs on the low side */
3166 while (at <= ev_rt_now)
3167 {
3168 ev_tstamp nat = at + w->interval;
3169
3170 /* when resolution fails us, we use ev_rt_now */
3171 if (expect_false (nat == at))
3172 {
3173 at = ev_rt_now;
3174 break;
3175 }
3176
3177 at = nat;
3178 }
3179
3180 ev_at (w) = at;
3181}
3182
3183/* make periodics pending */
3184inline_size void
3185periodics_reify (EV_P)
3186{
3187 EV_FREQUENT_CHECK;
3188
3189 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
3190 {
3191 do
3192 {
3193 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
3194
3195 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
3196
3197 /* first reschedule or stop timer */
3198 if (w->reschedule_cb)
3199 {
3200 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3201
3202 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
3203
3204 ANHE_at_cache (periodics [HEAP0]);
3205 downheap (periodics, periodiccnt, HEAP0);
3206 }
3207 else if (w->interval)
3208 {
3209 periodic_recalc (EV_A_ w);
3210 ANHE_at_cache (periodics [HEAP0]);
3211 downheap (periodics, periodiccnt, HEAP0);
3212 }
3213 else
3214 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
3215
3216 EV_FREQUENT_CHECK;
3217 feed_reverse (EV_A_ (W)w);
3218 }
3219 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
3220
3221 feed_reverse_done (EV_A_ EV_PERIODIC);
3222 }
3223}
3224
3225/* simply recalculate all periodics */
3226/* TODO: maybe ensure that at least one event happens when jumping forward? */
3227static void noinline ecb_cold
3228periodics_reschedule (EV_P)
3229{
3230 int i;
3231
3232 /* adjust periodics after time jump */
3233 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
3234 {
3235 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
3236
3237 if (w->reschedule_cb)
3238 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3239 else if (w->interval)
3240 periodic_recalc (EV_A_ w);
3241
3242 ANHE_at_cache (periodics [i]);
3243 }
3244
3245 reheap (periodics, periodiccnt);
3246}
3247#endif
3248
3249/* adjust all timers by a given offset */
3250static void noinline ecb_cold
3251timers_reschedule (EV_P_ ev_tstamp adjust)
3252{
3253 int i;
3254
3255 for (i = 0; i < timercnt; ++i)
3256 {
3257 ANHE *he = timers + i + HEAP0;
3258 ANHE_w (*he)->at += adjust;
3259 ANHE_at_cache (*he);
3260 }
3261}
3262
3263/* fetch new monotonic and realtime times from the kernel */
3264/* also detect if there was a timejump, and act accordingly */
3265inline_speed void
3266time_update (EV_P_ ev_tstamp max_block)
3267{
3268#if EV_USE_MONOTONIC
3269 if (expect_true (have_monotonic))
3270 {
3271 int i;
3272 ev_tstamp odiff = rtmn_diff;
3273
3274 mn_now = get_clock ();
3275
3276 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
3277 /* interpolate in the meantime */
3278 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
3279 {
3280 ev_rt_now = rtmn_diff + mn_now;
3281 return;
3282 }
3283
3284 now_floor = mn_now;
3285 ev_rt_now = ev_time ();
3286
3287 /* loop a few times, before making important decisions.
3288 * on the choice of "4": one iteration isn't enough,
3289 * in case we get preempted during the calls to
3290 * ev_time and get_clock. a second call is almost guaranteed
3291 * to succeed in that case, though. and looping a few more times
3292 * doesn't hurt either as we only do this on time-jumps or
3293 * in the unlikely event of having been preempted here.
3294 */
3295 for (i = 4; --i; )
3296 {
3297 ev_tstamp diff;
3298 rtmn_diff = ev_rt_now - mn_now;
3299
3300 diff = odiff - rtmn_diff;
3301
3302 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
3303 return; /* all is well */
3304
3305 ev_rt_now = ev_time ();
3306 mn_now = get_clock ();
3307 now_floor = mn_now;
3308 }
3309
3310 /* no timer adjustment, as the monotonic clock doesn't jump */
3311 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
3312# if EV_PERIODIC_ENABLE
3313 periodics_reschedule (EV_A);
3314# endif
3315 }
3316 else
3317#endif
3318 {
3319 ev_rt_now = ev_time ();
3320
3321 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
3322 {
3323 /* adjust timers. this is easy, as the offset is the same for all of them */
3324 timers_reschedule (EV_A_ ev_rt_now - mn_now);
3325#if EV_PERIODIC_ENABLE
3326 periodics_reschedule (EV_A);
3327#endif
3328 }
3329
3330 mn_now = ev_rt_now;
3331 }
3332}
3333
3334int
3335ev_run (EV_P_ int flags)
3336{
3337#if EV_FEATURE_API
3338 ++loop_depth;
3339#endif
3340
3341 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3342
3343 loop_done = EVBREAK_CANCEL;
3344
3345 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
3346
3347 do
3348 {
3349#if EV_VERIFY >= 2
3350 ev_verify (EV_A);
3351#endif
3352
3353#ifndef _WIN32
3354 if (expect_false (curpid)) /* penalise the forking check even more */
3355 if (expect_false (getpid () != curpid))
3356 {
3357 curpid = getpid ();
3358 postfork = 1;
3359 }
3360#endif
3361
3362#if EV_FORK_ENABLE
3363 /* we might have forked, so queue fork handlers */
3364 if (expect_false (postfork))
3365 if (forkcnt)
3366 {
3367 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
3368 EV_INVOKE_PENDING;
3369 }
3370#endif
3371
3372#if EV_PREPARE_ENABLE
3373 /* queue prepare watchers (and execute them) */
3374 if (expect_false (preparecnt))
3375 {
3376 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
3377 EV_INVOKE_PENDING;
3378 }
3379#endif
3380
3381 if (expect_false (loop_done))
3382 break;
3383
3384 /* we might have forked, so reify kernel state if necessary */
3385 if (expect_false (postfork))
3386 loop_fork (EV_A);
3387
3388 /* update fd-related kernel structures */
3389 fd_reify (EV_A);
3390
3391 /* calculate blocking time */
537 { 3392 {
538 struct timespec ts; 3393 ev_tstamp waittime = 0.;
539 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 3394 ev_tstamp sleeptime = 0.;
540 have_monotonic = 1; 3395
3396 /* remember old timestamp for io_blocktime calculation */
3397 ev_tstamp prev_mn_now = mn_now;
3398
3399 /* update time to cancel out callback processing overhead */
3400 time_update (EV_A_ 1e100);
3401
3402 /* from now on, we want a pipe-wake-up */
3403 pipe_write_wanted = 1;
3404
3405 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3406
3407 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
3408 {
3409 waittime = MAX_BLOCKTIME;
3410
3411 if (timercnt)
3412 {
3413 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
3414 if (waittime > to) waittime = to;
3415 }
3416
3417#if EV_PERIODIC_ENABLE
3418 if (periodiccnt)
3419 {
3420 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
3421 if (waittime > to) waittime = to;
3422 }
3423#endif
3424
3425 /* don't let timeouts decrease the waittime below timeout_blocktime */
3426 if (expect_false (waittime < timeout_blocktime))
3427 waittime = timeout_blocktime;
3428
3429 /* at this point, we NEED to wait, so we have to ensure */
3430 /* to pass a minimum nonzero value to the backend */
3431 if (expect_false (waittime < backend_mintime))
3432 waittime = backend_mintime;
3433
3434 /* extra check because io_blocktime is commonly 0 */
3435 if (expect_false (io_blocktime))
3436 {
3437 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3438
3439 if (sleeptime > waittime - backend_mintime)
3440 sleeptime = waittime - backend_mintime;
3441
3442 if (expect_true (sleeptime > 0.))
3443 {
3444 ev_sleep (sleeptime);
3445 waittime -= sleeptime;
3446 }
3447 }
3448 }
3449
3450#if EV_FEATURE_API
3451 ++loop_count;
3452#endif
3453 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
3454 backend_poll (EV_A_ waittime);
3455 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3456
3457 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3458
3459 ECB_MEMORY_FENCE_ACQUIRE;
3460 if (pipe_write_skipped)
3461 {
3462 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3463 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3464 }
3465
3466
3467 /* update ev_rt_now, do magic */
3468 time_update (EV_A_ waittime + sleeptime);
541 } 3469 }
542#endif
543 3470
544 ev_now = ev_time (); 3471 /* queue pending timers and reschedule them */
545 now = get_clock (); 3472 timers_reify (EV_A); /* relative timers called last */
546 now_floor = now; 3473#if EV_PERIODIC_ENABLE
547 diff = ev_now - now; 3474 periodics_reify (EV_A); /* absolute timers called first */
548
549 if (pipe (sigpipe))
550 return 0;
551
552 if (methods == EVMETHOD_AUTO)
553 if (!enable_secure () && getenv ("LIBEV_METHODS"))
554 methods = atoi (getenv ("LIBEV_METHODS"));
555 else
556 methods = EVMETHOD_ANY;
557
558 ev_method = 0;
559#if EV_USE_KQUEUE
560 if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);
561#endif 3475#endif
562#if EV_USE_EPOLL
563 if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);
564#endif
565#if EV_USE_POLL
566 if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);
567#endif
568#if EV_USE_SELECT
569 if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);
570#endif
571 3476
572 if (ev_method) 3477#if EV_IDLE_ENABLE
3478 /* queue idle watchers unless other events are pending */
3479 idle_reify (EV_A);
3480#endif
3481
3482#if EV_CHECK_ENABLE
3483 /* queue check watchers, to be executed first */
3484 if (expect_false (checkcnt))
3485 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3486#endif
3487
3488 EV_INVOKE_PENDING;
3489 }
3490 while (expect_true (
3491 activecnt
3492 && !loop_done
3493 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3494 ));
3495
3496 if (loop_done == EVBREAK_ONE)
3497 loop_done = EVBREAK_CANCEL;
3498
3499#if EV_FEATURE_API
3500 --loop_depth;
3501#endif
3502
3503 return activecnt;
3504}
3505
3506void
3507ev_break (EV_P_ int how) EV_THROW
3508{
3509 loop_done = how;
3510}
3511
3512void
3513ev_ref (EV_P) EV_THROW
3514{
3515 ++activecnt;
3516}
3517
3518void
3519ev_unref (EV_P) EV_THROW
3520{
3521 --activecnt;
3522}
3523
3524void
3525ev_now_update (EV_P) EV_THROW
3526{
3527 time_update (EV_A_ 1e100);
3528}
3529
3530void
3531ev_suspend (EV_P) EV_THROW
3532{
3533 ev_now_update (EV_A);
3534}
3535
3536void
3537ev_resume (EV_P) EV_THROW
3538{
3539 ev_tstamp mn_prev = mn_now;
3540
3541 ev_now_update (EV_A);
3542 timers_reschedule (EV_A_ mn_now - mn_prev);
3543#if EV_PERIODIC_ENABLE
3544 /* TODO: really do this? */
3545 periodics_reschedule (EV_A);
3546#endif
3547}
3548
3549/*****************************************************************************/
3550/* singly-linked list management, used when the expected list length is short */
3551
3552inline_size void
3553wlist_add (WL *head, WL elem)
3554{
3555 elem->next = *head;
3556 *head = elem;
3557}
3558
3559inline_size void
3560wlist_del (WL *head, WL elem)
3561{
3562 while (*head)
3563 {
3564 if (expect_true (*head == elem))
573 { 3565 {
574 ev_watcher_init (&sigev, sigcb); 3566 *head = elem->next;
575 siginit (); 3567 break;
576
577#ifndef WIN32
578 ev_signal_init (&childev, childcb, SIGCHLD);
579 ev_signal_start (&childev);
580#endif
581 } 3568 }
3569
3570 head = &(*head)->next;
3571 }
3572}
3573
3574/* internal, faster, version of ev_clear_pending */
3575inline_speed void
3576clear_pending (EV_P_ W w)
3577{
3578 if (w->pending)
582 } 3579 {
3580 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
3581 w->pending = 0;
3582 }
3583}
583 3584
584 return ev_method; 3585int
3586ev_clear_pending (EV_P_ void *w) EV_THROW
3587{
3588 W w_ = (W)w;
3589 int pending = w_->pending;
3590
3591 if (expect_true (pending))
3592 {
3593 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3594 p->w = (W)&pending_w;
3595 w_->pending = 0;
3596 return p->events;
3597 }
3598 else
3599 return 0;
3600}
3601
3602inline_size void
3603pri_adjust (EV_P_ W w)
3604{
3605 int pri = ev_priority (w);
3606 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3607 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3608 ev_set_priority (w, pri);
3609}
3610
3611inline_speed void
3612ev_start (EV_P_ W w, int active)
3613{
3614 pri_adjust (EV_A_ w);
3615 w->active = active;
3616 ev_ref (EV_A);
3617}
3618
3619inline_size void
3620ev_stop (EV_P_ W w)
3621{
3622 ev_unref (EV_A);
3623 w->active = 0;
585} 3624}
586 3625
587/*****************************************************************************/ 3626/*****************************************************************************/
588 3627
589void 3628void noinline
590ev_fork_prepare (void) 3629ev_io_start (EV_P_ ev_io *w) EV_THROW
591{ 3630{
592 /* nop */ 3631 int fd = w->fd;
593}
594 3632
595void 3633 if (expect_false (ev_is_active (w)))
596ev_fork_parent (void) 3634 return;
597{
598 /* nop */
599}
600 3635
601void 3636 assert (("libev: ev_io_start called with negative fd", fd >= 0));
602ev_fork_child (void) 3637 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
603{
604#if EV_USE_EPOLL
605 if (ev_method == EVMETHOD_EPOLL)
606 epoll_postfork_child ();
607#endif
608 3638
609 ev_io_stop (&sigev); 3639 EV_FREQUENT_CHECK;
610 close (sigpipe [0]);
611 close (sigpipe [1]);
612 pipe (sigpipe);
613 siginit ();
614}
615 3640
616/*****************************************************************************/ 3641 ev_start (EV_A_ (W)w, 1);
3642 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
3643 wlist_add (&anfds[fd].head, (WL)w);
617 3644
618static void 3645 /* common bug, apparently */
619call_pending (void) 3646 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
620{
621 int pri;
622 3647
623 for (pri = NUMPRI; pri--; ) 3648 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
624 while (pendingcnt [pri]) 3649 w->events &= ~EV__IOFDSET;
3650
3651 EV_FREQUENT_CHECK;
3652}
3653
3654void noinline
3655ev_io_stop (EV_P_ ev_io *w) EV_THROW
3656{
3657 clear_pending (EV_A_ (W)w);
3658 if (expect_false (!ev_is_active (w)))
3659 return;
3660
3661 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3662
3663 EV_FREQUENT_CHECK;
3664
3665 wlist_del (&anfds[w->fd].head, (WL)w);
3666 ev_stop (EV_A_ (W)w);
3667
3668 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3669
3670 EV_FREQUENT_CHECK;
3671}
3672
3673void noinline
3674ev_timer_start (EV_P_ ev_timer *w) EV_THROW
3675{
3676 if (expect_false (ev_is_active (w)))
3677 return;
3678
3679 ev_at (w) += mn_now;
3680
3681 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
3682
3683 EV_FREQUENT_CHECK;
3684
3685 ++timercnt;
3686 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
3687 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
3688 ANHE_w (timers [ev_active (w)]) = (WT)w;
3689 ANHE_at_cache (timers [ev_active (w)]);
3690 upheap (timers, ev_active (w));
3691
3692 EV_FREQUENT_CHECK;
3693
3694 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
3695}
3696
3697void noinline
3698ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
3699{
3700 clear_pending (EV_A_ (W)w);
3701 if (expect_false (!ev_is_active (w)))
3702 return;
3703
3704 EV_FREQUENT_CHECK;
3705
3706 {
3707 int active = ev_active (w);
3708
3709 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3710
3711 --timercnt;
3712
3713 if (expect_true (active < timercnt + HEAP0))
625 { 3714 {
626 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3715 timers [active] = timers [timercnt + HEAP0];
627 3716 adjustheap (timers, timercnt, active);
628 if (p->w)
629 {
630 p->w->pending = 0;
631 p->w->cb (p->w, p->events);
632 }
633 } 3717 }
634} 3718 }
635 3719
636static void 3720 ev_at (w) -= mn_now;
637timers_reify (void)
638{
639 while (timercnt && timers [0]->at <= now)
640 {
641 struct ev_timer *w = timers [0];
642 3721
643 /* first reschedule or stop timer */ 3722 ev_stop (EV_A_ (W)w);
3723
3724 EV_FREQUENT_CHECK;
3725}
3726
3727void noinline
3728ev_timer_again (EV_P_ ev_timer *w) EV_THROW
3729{
3730 EV_FREQUENT_CHECK;
3731
3732 clear_pending (EV_A_ (W)w);
3733
3734 if (ev_is_active (w))
3735 {
644 if (w->repeat) 3736 if (w->repeat)
645 { 3737 {
646 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
647 w->at = now + w->repeat; 3738 ev_at (w) = mn_now + w->repeat;
648 downheap ((WT *)timers, timercnt, 0); 3739 ANHE_at_cache (timers [ev_active (w)]);
3740 adjustheap (timers, timercnt, ev_active (w));
649 } 3741 }
650 else 3742 else
651 ev_timer_stop (w); /* nonrepeating: stop timer */ 3743 ev_timer_stop (EV_A_ w);
652
653 event ((W)w, EV_TIMEOUT);
654 }
655}
656
657static void
658periodics_reify (void)
659{
660 while (periodiccnt && periodics [0]->at <= ev_now)
661 { 3744 }
662 struct ev_periodic *w = periodics [0]; 3745 else if (w->repeat)
3746 {
3747 ev_at (w) = w->repeat;
3748 ev_timer_start (EV_A_ w);
3749 }
663 3750
664 /* first reschedule or stop timer */ 3751 EV_FREQUENT_CHECK;
3752}
3753
3754ev_tstamp
3755ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3756{
3757 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3758}
3759
3760#if EV_PERIODIC_ENABLE
3761void noinline
3762ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
3763{
3764 if (expect_false (ev_is_active (w)))
3765 return;
3766
3767 if (w->reschedule_cb)
3768 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
665 if (w->interval) 3769 else if (w->interval)
3770 {
3771 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
3772 periodic_recalc (EV_A_ w);
3773 }
3774 else
3775 ev_at (w) = w->offset;
3776
3777 EV_FREQUENT_CHECK;
3778
3779 ++periodiccnt;
3780 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
3781 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
3782 ANHE_w (periodics [ev_active (w)]) = (WT)w;
3783 ANHE_at_cache (periodics [ev_active (w)]);
3784 upheap (periodics, ev_active (w));
3785
3786 EV_FREQUENT_CHECK;
3787
3788 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
3789}
3790
3791void noinline
3792ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
3793{
3794 clear_pending (EV_A_ (W)w);
3795 if (expect_false (!ev_is_active (w)))
3796 return;
3797
3798 EV_FREQUENT_CHECK;
3799
3800 {
3801 int active = ev_active (w);
3802
3803 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3804
3805 --periodiccnt;
3806
3807 if (expect_true (active < periodiccnt + HEAP0))
3808 {
3809 periodics [active] = periodics [periodiccnt + HEAP0];
3810 adjustheap (periodics, periodiccnt, active);
3811 }
3812 }
3813
3814 ev_stop (EV_A_ (W)w);
3815
3816 EV_FREQUENT_CHECK;
3817}
3818
3819void noinline
3820ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
3821{
3822 /* TODO: use adjustheap and recalculation */
3823 ev_periodic_stop (EV_A_ w);
3824 ev_periodic_start (EV_A_ w);
3825}
3826#endif
3827
3828#ifndef SA_RESTART
3829# define SA_RESTART 0
3830#endif
3831
3832#if EV_SIGNAL_ENABLE
3833
3834void noinline
3835ev_signal_start (EV_P_ ev_signal *w) EV_THROW
3836{
3837 if (expect_false (ev_is_active (w)))
3838 return;
3839
3840 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3841
3842#if EV_MULTIPLICITY
3843 assert (("libev: a signal must not be attached to two different loops",
3844 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3845
3846 signals [w->signum - 1].loop = EV_A;
3847 ECB_MEMORY_FENCE_RELEASE;
3848#endif
3849
3850 EV_FREQUENT_CHECK;
3851
3852#if EV_USE_SIGNALFD
3853 if (sigfd == -2)
3854 {
3855 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3856 if (sigfd < 0 && errno == EINVAL)
3857 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3858
3859 if (sigfd >= 0)
666 { 3860 {
667 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 3861 fd_intern (sigfd); /* doing it twice will not hurt */
668 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); 3862
669 downheap ((WT *)periodics, periodiccnt, 0); 3863 sigemptyset (&sigfd_set);
3864
3865 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3866 ev_set_priority (&sigfd_w, EV_MAXPRI);
3867 ev_io_start (EV_A_ &sigfd_w);
3868 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3869 }
3870 }
3871
3872 if (sigfd >= 0)
3873 {
3874 /* TODO: check .head */
3875 sigaddset (&sigfd_set, w->signum);
3876 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3877
3878 signalfd (sigfd, &sigfd_set, 0);
3879 }
3880#endif
3881
3882 ev_start (EV_A_ (W)w, 1);
3883 wlist_add (&signals [w->signum - 1].head, (WL)w);
3884
3885 if (!((WL)w)->next)
3886# if EV_USE_SIGNALFD
3887 if (sigfd < 0) /*TODO*/
3888# endif
3889 {
3890# ifdef _WIN32
3891 evpipe_init (EV_A);
3892
3893 signal (w->signum, ev_sighandler);
3894# else
3895 struct sigaction sa;
3896
3897 evpipe_init (EV_A);
3898
3899 sa.sa_handler = ev_sighandler;
3900 sigfillset (&sa.sa_mask);
3901 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3902 sigaction (w->signum, &sa, 0);
3903
3904 if (origflags & EVFLAG_NOSIGMASK)
3905 {
3906 sigemptyset (&sa.sa_mask);
3907 sigaddset (&sa.sa_mask, w->signum);
3908 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3909 }
3910#endif
3911 }
3912
3913 EV_FREQUENT_CHECK;
3914}
3915
3916void noinline
3917ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
3918{
3919 clear_pending (EV_A_ (W)w);
3920 if (expect_false (!ev_is_active (w)))
3921 return;
3922
3923 EV_FREQUENT_CHECK;
3924
3925 wlist_del (&signals [w->signum - 1].head, (WL)w);
3926 ev_stop (EV_A_ (W)w);
3927
3928 if (!signals [w->signum - 1].head)
3929 {
3930#if EV_MULTIPLICITY
3931 signals [w->signum - 1].loop = 0; /* unattach from signal */
3932#endif
3933#if EV_USE_SIGNALFD
3934 if (sigfd >= 0)
3935 {
3936 sigset_t ss;
3937
3938 sigemptyset (&ss);
3939 sigaddset (&ss, w->signum);
3940 sigdelset (&sigfd_set, w->signum);
3941
3942 signalfd (sigfd, &sigfd_set, 0);
3943 sigprocmask (SIG_UNBLOCK, &ss, 0);
670 } 3944 }
671 else 3945 else
672 ev_periodic_stop (w); /* nonrepeating: stop timer */ 3946#endif
673 3947 signal (w->signum, SIG_DFL);
674 event ((W)w, EV_PERIODIC);
675 }
676}
677
678static void
679periodics_reschedule (ev_tstamp diff)
680{
681 int i;
682
683 /* adjust periodics after time jump */
684 for (i = 0; i < periodiccnt; ++i)
685 { 3948 }
686 struct ev_periodic *w = periodics [i];
687 3949
688 if (w->interval) 3950 EV_FREQUENT_CHECK;
3951}
3952
3953#endif
3954
3955#if EV_CHILD_ENABLE
3956
3957void
3958ev_child_start (EV_P_ ev_child *w) EV_THROW
3959{
3960#if EV_MULTIPLICITY
3961 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3962#endif
3963 if (expect_false (ev_is_active (w)))
3964 return;
3965
3966 EV_FREQUENT_CHECK;
3967
3968 ev_start (EV_A_ (W)w, 1);
3969 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3970
3971 EV_FREQUENT_CHECK;
3972}
3973
3974void
3975ev_child_stop (EV_P_ ev_child *w) EV_THROW
3976{
3977 clear_pending (EV_A_ (W)w);
3978 if (expect_false (!ev_is_active (w)))
3979 return;
3980
3981 EV_FREQUENT_CHECK;
3982
3983 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3984 ev_stop (EV_A_ (W)w);
3985
3986 EV_FREQUENT_CHECK;
3987}
3988
3989#endif
3990
3991#if EV_STAT_ENABLE
3992
3993# ifdef _WIN32
3994# undef lstat
3995# define lstat(a,b) _stati64 (a,b)
3996# endif
3997
3998#define DEF_STAT_INTERVAL 5.0074891
3999#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
4000#define MIN_STAT_INTERVAL 0.1074891
4001
4002static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
4003
4004#if EV_USE_INOTIFY
4005
4006/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
4007# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
4008
4009static void noinline
4010infy_add (EV_P_ ev_stat *w)
4011{
4012 w->wd = inotify_add_watch (fs_fd, w->path,
4013 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4014 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4015 | IN_DONT_FOLLOW | IN_MASK_ADD);
4016
4017 if (w->wd >= 0)
4018 {
4019 struct statfs sfs;
4020
4021 /* now local changes will be tracked by inotify, but remote changes won't */
4022 /* unless the filesystem is known to be local, we therefore still poll */
4023 /* also do poll on <2.6.25, but with normal frequency */
4024
4025 if (!fs_2625)
4026 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4027 else if (!statfs (w->path, &sfs)
4028 && (sfs.f_type == 0x1373 /* devfs */
4029 || sfs.f_type == 0x4006 /* fat */
4030 || sfs.f_type == 0x4d44 /* msdos */
4031 || sfs.f_type == 0xEF53 /* ext2/3 */
4032 || sfs.f_type == 0x72b6 /* jffs2 */
4033 || sfs.f_type == 0x858458f6 /* ramfs */
4034 || sfs.f_type == 0x5346544e /* ntfs */
4035 || sfs.f_type == 0x3153464a /* jfs */
4036 || sfs.f_type == 0x9123683e /* btrfs */
4037 || sfs.f_type == 0x52654973 /* reiser3 */
4038 || sfs.f_type == 0x01021994 /* tmpfs */
4039 || sfs.f_type == 0x58465342 /* xfs */))
4040 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4041 else
4042 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
4043 }
4044 else
4045 {
4046 /* can't use inotify, continue to stat */
4047 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4048
4049 /* if path is not there, monitor some parent directory for speedup hints */
4050 /* note that exceeding the hardcoded path limit is not a correctness issue, */
4051 /* but an efficiency issue only */
4052 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
689 { 4053 {
690 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 4054 char path [4096];
4055 strcpy (path, w->path);
691 4056
692 if (fabs (diff) >= 1e-4) 4057 do
693 { 4058 {
694 ev_periodic_stop (w); 4059 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
695 ev_periodic_start (w); 4060 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
696 4061
697 i = 0; /* restart loop, inefficient, but time jumps should be rare */ 4062 char *pend = strrchr (path, '/');
4063
4064 if (!pend || pend == path)
4065 break;
4066
4067 *pend = 0;
4068 w->wd = inotify_add_watch (fs_fd, path, mask);
4069 }
4070 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
4071 }
4072 }
4073
4074 if (w->wd >= 0)
4075 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4076
4077 /* now re-arm timer, if required */
4078 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4079 ev_timer_again (EV_A_ &w->timer);
4080 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4081}
4082
4083static void noinline
4084infy_del (EV_P_ ev_stat *w)
4085{
4086 int slot;
4087 int wd = w->wd;
4088
4089 if (wd < 0)
4090 return;
4091
4092 w->wd = -2;
4093 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
4094 wlist_del (&fs_hash [slot].head, (WL)w);
4095
4096 /* remove this watcher, if others are watching it, they will rearm */
4097 inotify_rm_watch (fs_fd, wd);
4098}
4099
4100static void noinline
4101infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
4102{
4103 if (slot < 0)
4104 /* overflow, need to check for all hash slots */
4105 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
4106 infy_wd (EV_A_ slot, wd, ev);
4107 else
4108 {
4109 WL w_;
4110
4111 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
4112 {
4113 ev_stat *w = (ev_stat *)w_;
4114 w_ = w_->next; /* lets us remove this watcher and all before it */
4115
4116 if (w->wd == wd || wd == -1)
4117 {
4118 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
4119 {
4120 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4121 w->wd = -1;
4122 infy_add (EV_A_ w); /* re-add, no matter what */
4123 }
4124
4125 stat_timer_cb (EV_A_ &w->timer, 0);
698 } 4126 }
699 } 4127 }
700 } 4128 }
701} 4129}
702 4130
703static int 4131static void
704time_update_monotonic (void) 4132infy_cb (EV_P_ ev_io *w, int revents)
705{ 4133{
706 now = get_clock (); 4134 char buf [EV_INOTIFY_BUFSIZE];
4135 int ofs;
4136 int len = read (fs_fd, buf, sizeof (buf));
707 4137
708 if (expect_true (now - now_floor < MIN_TIMEJUMP * .5)) 4138 for (ofs = 0; ofs < len; )
4139 {
4140 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
4141 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4142 ofs += sizeof (struct inotify_event) + ev->len;
709 { 4143 }
710 ev_now = now + diff; 4144}
4145
4146inline_size void ecb_cold
4147ev_check_2625 (EV_P)
4148{
4149 /* kernels < 2.6.25 are borked
4150 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4151 */
4152 if (ev_linux_version () < 0x020619)
711 return 0; 4153 return;
4154
4155 fs_2625 = 1;
4156}
4157
4158inline_size int
4159infy_newfd (void)
4160{
4161#if defined IN_CLOEXEC && defined IN_NONBLOCK
4162 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4163 if (fd >= 0)
4164 return fd;
4165#endif
4166 return inotify_init ();
4167}
4168
4169inline_size void
4170infy_init (EV_P)
4171{
4172 if (fs_fd != -2)
4173 return;
4174
4175 fs_fd = -1;
4176
4177 ev_check_2625 (EV_A);
4178
4179 fs_fd = infy_newfd ();
4180
4181 if (fs_fd >= 0)
712 } 4182 {
4183 fd_intern (fs_fd);
4184 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
4185 ev_set_priority (&fs_w, EV_MAXPRI);
4186 ev_io_start (EV_A_ &fs_w);
4187 ev_unref (EV_A);
4188 }
4189}
4190
4191inline_size void
4192infy_fork (EV_P)
4193{
4194 int slot;
4195
4196 if (fs_fd < 0)
4197 return;
4198
4199 ev_ref (EV_A);
4200 ev_io_stop (EV_A_ &fs_w);
4201 close (fs_fd);
4202 fs_fd = infy_newfd ();
4203
4204 if (fs_fd >= 0)
4205 {
4206 fd_intern (fs_fd);
4207 ev_io_set (&fs_w, fs_fd, EV_READ);
4208 ev_io_start (EV_A_ &fs_w);
4209 ev_unref (EV_A);
4210 }
4211
4212 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
4213 {
4214 WL w_ = fs_hash [slot].head;
4215 fs_hash [slot].head = 0;
4216
4217 while (w_)
4218 {
4219 ev_stat *w = (ev_stat *)w_;
4220 w_ = w_->next; /* lets us add this watcher */
4221
4222 w->wd = -1;
4223
4224 if (fs_fd >= 0)
4225 infy_add (EV_A_ w); /* re-add, no matter what */
4226 else
4227 {
4228 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4229 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4230 ev_timer_again (EV_A_ &w->timer);
4231 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4232 }
4233 }
4234 }
4235}
4236
4237#endif
4238
4239#ifdef _WIN32
4240# define EV_LSTAT(p,b) _stati64 (p, b)
4241#else
4242# define EV_LSTAT(p,b) lstat (p, b)
4243#endif
4244
4245void
4246ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
4247{
4248 if (lstat (w->path, &w->attr) < 0)
4249 w->attr.st_nlink = 0;
4250 else if (!w->attr.st_nlink)
4251 w->attr.st_nlink = 1;
4252}
4253
4254static void noinline
4255stat_timer_cb (EV_P_ ev_timer *w_, int revents)
4256{
4257 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
4258
4259 ev_statdata prev = w->attr;
4260 ev_stat_stat (EV_A_ w);
4261
4262 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
4263 if (
4264 prev.st_dev != w->attr.st_dev
4265 || prev.st_ino != w->attr.st_ino
4266 || prev.st_mode != w->attr.st_mode
4267 || prev.st_nlink != w->attr.st_nlink
4268 || prev.st_uid != w->attr.st_uid
4269 || prev.st_gid != w->attr.st_gid
4270 || prev.st_rdev != w->attr.st_rdev
4271 || prev.st_size != w->attr.st_size
4272 || prev.st_atime != w->attr.st_atime
4273 || prev.st_mtime != w->attr.st_mtime
4274 || prev.st_ctime != w->attr.st_ctime
4275 ) {
4276 /* we only update w->prev on actual differences */
4277 /* in case we test more often than invoke the callback, */
4278 /* to ensure that prev is always different to attr */
4279 w->prev = prev;
4280
4281 #if EV_USE_INOTIFY
4282 if (fs_fd >= 0)
4283 {
4284 infy_del (EV_A_ w);
4285 infy_add (EV_A_ w);
4286 ev_stat_stat (EV_A_ w); /* avoid race... */
4287 }
4288 #endif
4289
4290 ev_feed_event (EV_A_ w, EV_STAT);
4291 }
4292}
4293
4294void
4295ev_stat_start (EV_P_ ev_stat *w) EV_THROW
4296{
4297 if (expect_false (ev_is_active (w)))
4298 return;
4299
4300 ev_stat_stat (EV_A_ w);
4301
4302 if (w->interval < MIN_STAT_INTERVAL && w->interval)
4303 w->interval = MIN_STAT_INTERVAL;
4304
4305 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
4306 ev_set_priority (&w->timer, ev_priority (w));
4307
4308#if EV_USE_INOTIFY
4309 infy_init (EV_A);
4310
4311 if (fs_fd >= 0)
4312 infy_add (EV_A_ w);
713 else 4313 else
4314#endif
4315 {
4316 ev_timer_again (EV_A_ &w->timer);
4317 ev_unref (EV_A);
714 { 4318 }
715 now_floor = now; 4319
716 ev_now = ev_time (); 4320 ev_start (EV_A_ (W)w, 1);
4321
4322 EV_FREQUENT_CHECK;
4323}
4324
4325void
4326ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
4327{
4328 clear_pending (EV_A_ (W)w);
4329 if (expect_false (!ev_is_active (w)))
717 return 1; 4330 return;
4331
4332 EV_FREQUENT_CHECK;
4333
4334#if EV_USE_INOTIFY
4335 infy_del (EV_A_ w);
4336#endif
4337
4338 if (ev_is_active (&w->timer))
718 } 4339 {
4340 ev_ref (EV_A);
4341 ev_timer_stop (EV_A_ &w->timer);
4342 }
4343
4344 ev_stop (EV_A_ (W)w);
4345
4346 EV_FREQUENT_CHECK;
4347}
4348#endif
4349
4350#if EV_IDLE_ENABLE
4351void
4352ev_idle_start (EV_P_ ev_idle *w) EV_THROW
4353{
4354 if (expect_false (ev_is_active (w)))
4355 return;
4356
4357 pri_adjust (EV_A_ (W)w);
4358
4359 EV_FREQUENT_CHECK;
4360
4361 {
4362 int active = ++idlecnt [ABSPRI (w)];
4363
4364 ++idleall;
4365 ev_start (EV_A_ (W)w, active);
4366
4367 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
4368 idles [ABSPRI (w)][active - 1] = w;
4369 }
4370
4371 EV_FREQUENT_CHECK;
4372}
4373
4374void
4375ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
4376{
4377 clear_pending (EV_A_ (W)w);
4378 if (expect_false (!ev_is_active (w)))
4379 return;
4380
4381 EV_FREQUENT_CHECK;
4382
4383 {
4384 int active = ev_active (w);
4385
4386 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
4387 ev_active (idles [ABSPRI (w)][active - 1]) = active;
4388
4389 ev_stop (EV_A_ (W)w);
4390 --idleall;
4391 }
4392
4393 EV_FREQUENT_CHECK;
4394}
4395#endif
4396
4397#if EV_PREPARE_ENABLE
4398void
4399ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
4400{
4401 if (expect_false (ev_is_active (w)))
4402 return;
4403
4404 EV_FREQUENT_CHECK;
4405
4406 ev_start (EV_A_ (W)w, ++preparecnt);
4407 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
4408 prepares [preparecnt - 1] = w;
4409
4410 EV_FREQUENT_CHECK;
4411}
4412
4413void
4414ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
4415{
4416 clear_pending (EV_A_ (W)w);
4417 if (expect_false (!ev_is_active (w)))
4418 return;
4419
4420 EV_FREQUENT_CHECK;
4421
4422 {
4423 int active = ev_active (w);
4424
4425 prepares [active - 1] = prepares [--preparecnt];
4426 ev_active (prepares [active - 1]) = active;
4427 }
4428
4429 ev_stop (EV_A_ (W)w);
4430
4431 EV_FREQUENT_CHECK;
4432}
4433#endif
4434
4435#if EV_CHECK_ENABLE
4436void
4437ev_check_start (EV_P_ ev_check *w) EV_THROW
4438{
4439 if (expect_false (ev_is_active (w)))
4440 return;
4441
4442 EV_FREQUENT_CHECK;
4443
4444 ev_start (EV_A_ (W)w, ++checkcnt);
4445 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
4446 checks [checkcnt - 1] = w;
4447
4448 EV_FREQUENT_CHECK;
4449}
4450
4451void
4452ev_check_stop (EV_P_ ev_check *w) EV_THROW
4453{
4454 clear_pending (EV_A_ (W)w);
4455 if (expect_false (!ev_is_active (w)))
4456 return;
4457
4458 EV_FREQUENT_CHECK;
4459
4460 {
4461 int active = ev_active (w);
4462
4463 checks [active - 1] = checks [--checkcnt];
4464 ev_active (checks [active - 1]) = active;
4465 }
4466
4467 ev_stop (EV_A_ (W)w);
4468
4469 EV_FREQUENT_CHECK;
4470}
4471#endif
4472
4473#if EV_EMBED_ENABLE
4474void noinline
4475ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
4476{
4477 ev_run (w->other, EVRUN_NOWAIT);
719} 4478}
720 4479
721static void 4480static void
722time_update (void) 4481embed_io_cb (EV_P_ ev_io *io, int revents)
723{ 4482{
724 int i; 4483 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
725 4484
726#if EV_USE_MONOTONIC 4485 if (ev_cb (w))
727 if (expect_true (have_monotonic)) 4486 ev_feed_event (EV_A_ (W)w, EV_EMBED);
728 {
729 if (time_update_monotonic ())
730 {
731 ev_tstamp odiff = diff;
732
733 for (i = 4; --i; ) /* loop a few times, before making important decisions */
734 {
735 diff = ev_now - now;
736
737 if (fabs (odiff - diff) < MIN_TIMEJUMP)
738 return; /* all is well */
739
740 ev_now = ev_time ();
741 now = get_clock ();
742 now_floor = now;
743 }
744
745 periodics_reschedule (diff - odiff);
746 /* no timer adjustment, as the monotonic clock doesn't jump */
747 }
748 }
749 else 4487 else
750#endif 4488 ev_run (w->other, EVRUN_NOWAIT);
4489}
4490
4491static void
4492embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4493{
4494 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4495
751 { 4496 {
752 ev_now = ev_time (); 4497 EV_P = w->other;
753 4498
754 if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 4499 while (fdchangecnt)
755 { 4500 {
756 periodics_reschedule (ev_now - now); 4501 fd_reify (EV_A);
757 4502 ev_run (EV_A_ EVRUN_NOWAIT);
758 /* adjust timers. this is easy, as the offset is the same for all */
759 for (i = 0; i < timercnt; ++i)
760 timers [i]->at += diff;
761 } 4503 }
762
763 now = ev_now;
764 } 4504 }
765} 4505}
766 4506
767int ev_loop_done; 4507static void
768 4508embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
769void ev_loop (int flags)
770{ 4509{
771 double block; 4510 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
772 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
773 4511
774 do 4512 ev_embed_stop (EV_A_ w);
4513
775 { 4514 {
776 /* queue check watchers (and execute them) */ 4515 EV_P = w->other;
777 if (expect_false (preparecnt))
778 {
779 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
780 call_pending ();
781 }
782 4516
783 /* update fd-related kernel structures */ 4517 ev_loop_fork (EV_A);
784 fd_reify (); 4518 ev_run (EV_A_ EVRUN_NOWAIT);
785
786 /* calculate blocking time */
787
788 /* we only need this for !monotonic clockor timers, but as we basically
789 always have timers, we just calculate it always */
790#if EV_USE_MONOTONIC
791 if (expect_true (have_monotonic))
792 time_update_monotonic ();
793 else
794#endif
795 {
796 ev_now = ev_time ();
797 now = ev_now;
798 }
799
800 if (flags & EVLOOP_NONBLOCK || idlecnt)
801 block = 0.;
802 else
803 {
804 block = MAX_BLOCKTIME;
805
806 if (timercnt)
807 {
808 ev_tstamp to = timers [0]->at - now + method_fudge;
809 if (block > to) block = to;
810 }
811
812 if (periodiccnt)
813 {
814 ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
815 if (block > to) block = to;
816 }
817
818 if (block < 0.) block = 0.;
819 }
820
821 method_poll (block);
822
823 /* update ev_now, do magic */
824 time_update ();
825
826 /* queue pending timers and reschedule them */
827 timers_reify (); /* relative timers called last */
828 periodics_reify (); /* absolute timers called first */
829
830 /* queue idle watchers unless io or timers are pending */
831 if (!pendingcnt)
832 queue_events ((W *)idles, idlecnt, EV_IDLE);
833
834 /* queue check watchers, to be executed first */
835 if (checkcnt)
836 queue_events ((W *)checks, checkcnt, EV_CHECK);
837
838 call_pending ();
839 } 4519 }
840 while (!ev_loop_done);
841 4520
842 if (ev_loop_done != 2) 4521 ev_embed_start (EV_A_ w);
843 ev_loop_done = 0;
844} 4522}
4523
4524#if 0
4525static void
4526embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4527{
4528 ev_idle_stop (EV_A_ idle);
4529}
4530#endif
4531
4532void
4533ev_embed_start (EV_P_ ev_embed *w) EV_THROW
4534{
4535 if (expect_false (ev_is_active (w)))
4536 return;
4537
4538 {
4539 EV_P = w->other;
4540 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4541 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4542 }
4543
4544 EV_FREQUENT_CHECK;
4545
4546 ev_set_priority (&w->io, ev_priority (w));
4547 ev_io_start (EV_A_ &w->io);
4548
4549 ev_prepare_init (&w->prepare, embed_prepare_cb);
4550 ev_set_priority (&w->prepare, EV_MINPRI);
4551 ev_prepare_start (EV_A_ &w->prepare);
4552
4553 ev_fork_init (&w->fork, embed_fork_cb);
4554 ev_fork_start (EV_A_ &w->fork);
4555
4556 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4557
4558 ev_start (EV_A_ (W)w, 1);
4559
4560 EV_FREQUENT_CHECK;
4561}
4562
4563void
4564ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
4565{
4566 clear_pending (EV_A_ (W)w);
4567 if (expect_false (!ev_is_active (w)))
4568 return;
4569
4570 EV_FREQUENT_CHECK;
4571
4572 ev_io_stop (EV_A_ &w->io);
4573 ev_prepare_stop (EV_A_ &w->prepare);
4574 ev_fork_stop (EV_A_ &w->fork);
4575
4576 ev_stop (EV_A_ (W)w);
4577
4578 EV_FREQUENT_CHECK;
4579}
4580#endif
4581
4582#if EV_FORK_ENABLE
4583void
4584ev_fork_start (EV_P_ ev_fork *w) EV_THROW
4585{
4586 if (expect_false (ev_is_active (w)))
4587 return;
4588
4589 EV_FREQUENT_CHECK;
4590
4591 ev_start (EV_A_ (W)w, ++forkcnt);
4592 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4593 forks [forkcnt - 1] = w;
4594
4595 EV_FREQUENT_CHECK;
4596}
4597
4598void
4599ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
4600{
4601 clear_pending (EV_A_ (W)w);
4602 if (expect_false (!ev_is_active (w)))
4603 return;
4604
4605 EV_FREQUENT_CHECK;
4606
4607 {
4608 int active = ev_active (w);
4609
4610 forks [active - 1] = forks [--forkcnt];
4611 ev_active (forks [active - 1]) = active;
4612 }
4613
4614 ev_stop (EV_A_ (W)w);
4615
4616 EV_FREQUENT_CHECK;
4617}
4618#endif
4619
4620#if EV_CLEANUP_ENABLE
4621void
4622ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4623{
4624 if (expect_false (ev_is_active (w)))
4625 return;
4626
4627 EV_FREQUENT_CHECK;
4628
4629 ev_start (EV_A_ (W)w, ++cleanupcnt);
4630 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4631 cleanups [cleanupcnt - 1] = w;
4632
4633 /* cleanup watchers should never keep a refcount on the loop */
4634 ev_unref (EV_A);
4635 EV_FREQUENT_CHECK;
4636}
4637
4638void
4639ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4640{
4641 clear_pending (EV_A_ (W)w);
4642 if (expect_false (!ev_is_active (w)))
4643 return;
4644
4645 EV_FREQUENT_CHECK;
4646 ev_ref (EV_A);
4647
4648 {
4649 int active = ev_active (w);
4650
4651 cleanups [active - 1] = cleanups [--cleanupcnt];
4652 ev_active (cleanups [active - 1]) = active;
4653 }
4654
4655 ev_stop (EV_A_ (W)w);
4656
4657 EV_FREQUENT_CHECK;
4658}
4659#endif
4660
4661#if EV_ASYNC_ENABLE
4662void
4663ev_async_start (EV_P_ ev_async *w) EV_THROW
4664{
4665 if (expect_false (ev_is_active (w)))
4666 return;
4667
4668 w->sent = 0;
4669
4670 evpipe_init (EV_A);
4671
4672 EV_FREQUENT_CHECK;
4673
4674 ev_start (EV_A_ (W)w, ++asynccnt);
4675 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4676 asyncs [asynccnt - 1] = w;
4677
4678 EV_FREQUENT_CHECK;
4679}
4680
4681void
4682ev_async_stop (EV_P_ ev_async *w) EV_THROW
4683{
4684 clear_pending (EV_A_ (W)w);
4685 if (expect_false (!ev_is_active (w)))
4686 return;
4687
4688 EV_FREQUENT_CHECK;
4689
4690 {
4691 int active = ev_active (w);
4692
4693 asyncs [active - 1] = asyncs [--asynccnt];
4694 ev_active (asyncs [active - 1]) = active;
4695 }
4696
4697 ev_stop (EV_A_ (W)w);
4698
4699 EV_FREQUENT_CHECK;
4700}
4701
4702void
4703ev_async_send (EV_P_ ev_async *w) EV_THROW
4704{
4705 w->sent = 1;
4706 evpipe_write (EV_A_ &async_pending);
4707}
4708#endif
845 4709
846/*****************************************************************************/ 4710/*****************************************************************************/
847 4711
848static void
849wlist_add (WL *head, WL elem)
850{
851 elem->next = *head;
852 *head = elem;
853}
854
855static void
856wlist_del (WL *head, WL elem)
857{
858 while (*head)
859 {
860 if (*head == elem)
861 {
862 *head = elem->next;
863 return;
864 }
865
866 head = &(*head)->next;
867 }
868}
869
870static void
871ev_clear_pending (W w)
872{
873 if (w->pending)
874 {
875 pendings [ABSPRI (w)][w->pending - 1].w = 0;
876 w->pending = 0;
877 }
878}
879
880static void
881ev_start (W w, int active)
882{
883 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
884 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
885
886 w->active = active;
887}
888
889static void
890ev_stop (W w)
891{
892 w->active = 0;
893}
894
895/*****************************************************************************/
896
897void
898ev_io_start (struct ev_io *w)
899{
900 int fd = w->fd;
901
902 if (ev_is_active (w))
903 return;
904
905 assert (("ev_io_start called with negative fd", fd >= 0));
906
907 ev_start ((W)w, 1);
908 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
909 wlist_add ((WL *)&anfds[fd].head, (WL)w);
910
911 fd_change (fd);
912}
913
914void
915ev_io_stop (struct ev_io *w)
916{
917 ev_clear_pending ((W)w);
918 if (!ev_is_active (w))
919 return;
920
921 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
922 ev_stop ((W)w);
923
924 fd_change (w->fd);
925}
926
927void
928ev_timer_start (struct ev_timer *w)
929{
930 if (ev_is_active (w))
931 return;
932
933 w->at += now;
934
935 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
936
937 ev_start ((W)w, ++timercnt);
938 array_needsize (timers, timermax, timercnt, );
939 timers [timercnt - 1] = w;
940 upheap ((WT *)timers, timercnt - 1);
941}
942
943void
944ev_timer_stop (struct ev_timer *w)
945{
946 ev_clear_pending ((W)w);
947 if (!ev_is_active (w))
948 return;
949
950 if (w->active < timercnt--)
951 {
952 timers [w->active - 1] = timers [timercnt];
953 downheap ((WT *)timers, timercnt, w->active - 1);
954 }
955
956 w->at = w->repeat;
957
958 ev_stop ((W)w);
959}
960
961void
962ev_timer_again (struct ev_timer *w)
963{
964 if (ev_is_active (w))
965 {
966 if (w->repeat)
967 {
968 w->at = now + w->repeat;
969 downheap ((WT *)timers, timercnt, w->active - 1);
970 }
971 else
972 ev_timer_stop (w);
973 }
974 else if (w->repeat)
975 ev_timer_start (w);
976}
977
978void
979ev_periodic_start (struct ev_periodic *w)
980{
981 if (ev_is_active (w))
982 return;
983
984 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
985
986 /* this formula differs from the one in periodic_reify because we do not always round up */
987 if (w->interval)
988 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
989
990 ev_start ((W)w, ++periodiccnt);
991 array_needsize (periodics, periodicmax, periodiccnt, );
992 periodics [periodiccnt - 1] = w;
993 upheap ((WT *)periodics, periodiccnt - 1);
994}
995
996void
997ev_periodic_stop (struct ev_periodic *w)
998{
999 ev_clear_pending ((W)w);
1000 if (!ev_is_active (w))
1001 return;
1002
1003 if (w->active < periodiccnt--)
1004 {
1005 periodics [w->active - 1] = periodics [periodiccnt];
1006 downheap ((WT *)periodics, periodiccnt, w->active - 1);
1007 }
1008
1009 ev_stop ((W)w);
1010}
1011
1012void
1013ev_signal_start (struct ev_signal *w)
1014{
1015 if (ev_is_active (w))
1016 return;
1017
1018 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1019
1020 ev_start ((W)w, 1);
1021 array_needsize (signals, signalmax, w->signum, signals_init);
1022 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1023
1024 if (!w->next)
1025 {
1026 struct sigaction sa;
1027 sa.sa_handler = sighandler;
1028 sigfillset (&sa.sa_mask);
1029 sa.sa_flags = 0;
1030 sigaction (w->signum, &sa, 0);
1031 }
1032}
1033
1034void
1035ev_signal_stop (struct ev_signal *w)
1036{
1037 ev_clear_pending ((W)w);
1038 if (!ev_is_active (w))
1039 return;
1040
1041 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1042 ev_stop ((W)w);
1043
1044 if (!signals [w->signum - 1].head)
1045 signal (w->signum, SIG_DFL);
1046}
1047
1048void
1049ev_idle_start (struct ev_idle *w)
1050{
1051 if (ev_is_active (w))
1052 return;
1053
1054 ev_start ((W)w, ++idlecnt);
1055 array_needsize (idles, idlemax, idlecnt, );
1056 idles [idlecnt - 1] = w;
1057}
1058
1059void
1060ev_idle_stop (struct ev_idle *w)
1061{
1062 ev_clear_pending ((W)w);
1063 if (ev_is_active (w))
1064 return;
1065
1066 idles [w->active - 1] = idles [--idlecnt];
1067 ev_stop ((W)w);
1068}
1069
1070void
1071ev_prepare_start (struct ev_prepare *w)
1072{
1073 if (ev_is_active (w))
1074 return;
1075
1076 ev_start ((W)w, ++preparecnt);
1077 array_needsize (prepares, preparemax, preparecnt, );
1078 prepares [preparecnt - 1] = w;
1079}
1080
1081void
1082ev_prepare_stop (struct ev_prepare *w)
1083{
1084 ev_clear_pending ((W)w);
1085 if (ev_is_active (w))
1086 return;
1087
1088 prepares [w->active - 1] = prepares [--preparecnt];
1089 ev_stop ((W)w);
1090}
1091
1092void
1093ev_check_start (struct ev_check *w)
1094{
1095 if (ev_is_active (w))
1096 return;
1097
1098 ev_start ((W)w, ++checkcnt);
1099 array_needsize (checks, checkmax, checkcnt, );
1100 checks [checkcnt - 1] = w;
1101}
1102
1103void
1104ev_check_stop (struct ev_check *w)
1105{
1106 ev_clear_pending ((W)w);
1107 if (ev_is_active (w))
1108 return;
1109
1110 checks [w->active - 1] = checks [--checkcnt];
1111 ev_stop ((W)w);
1112}
1113
1114void
1115ev_child_start (struct ev_child *w)
1116{
1117 if (ev_is_active (w))
1118 return;
1119
1120 ev_start ((W)w, 1);
1121 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1122}
1123
1124void
1125ev_child_stop (struct ev_child *w)
1126{
1127 ev_clear_pending ((W)w);
1128 if (ev_is_active (w))
1129 return;
1130
1131 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1132 ev_stop ((W)w);
1133}
1134
1135/*****************************************************************************/
1136
1137struct ev_once 4712struct ev_once
1138{ 4713{
1139 struct ev_io io; 4714 ev_io io;
1140 struct ev_timer to; 4715 ev_timer to;
1141 void (*cb)(int revents, void *arg); 4716 void (*cb)(int revents, void *arg);
1142 void *arg; 4717 void *arg;
1143}; 4718};
1144 4719
1145static void 4720static void
1146once_cb (struct ev_once *once, int revents) 4721once_cb (EV_P_ struct ev_once *once, int revents)
1147{ 4722{
1148 void (*cb)(int revents, void *arg) = once->cb; 4723 void (*cb)(int revents, void *arg) = once->cb;
1149 void *arg = once->arg; 4724 void *arg = once->arg;
1150 4725
1151 ev_io_stop (&once->io); 4726 ev_io_stop (EV_A_ &once->io);
1152 ev_timer_stop (&once->to); 4727 ev_timer_stop (EV_A_ &once->to);
1153 free (once); 4728 ev_free (once);
1154 4729
1155 cb (revents, arg); 4730 cb (revents, arg);
1156} 4731}
1157 4732
1158static void 4733static void
1159once_cb_io (struct ev_io *w, int revents) 4734once_cb_io (EV_P_ ev_io *w, int revents)
1160{ 4735{
1161 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4736 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4737
4738 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1162} 4739}
1163 4740
1164static void 4741static void
1165once_cb_to (struct ev_timer *w, int revents) 4742once_cb_to (EV_P_ ev_timer *w, int revents)
1166{ 4743{
1167 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4744 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4745
4746 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1168} 4747}
1169 4748
1170void 4749void
1171ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4750ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
1172{ 4751{
1173 struct ev_once *once = malloc (sizeof (struct ev_once)); 4752 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1174 4753
1175 if (!once) 4754 if (expect_false (!once))
4755 {
1176 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4756 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1177 else 4757 return;
1178 { 4758 }
4759
1179 once->cb = cb; 4760 once->cb = cb;
1180 once->arg = arg; 4761 once->arg = arg;
1181 4762
1182 ev_watcher_init (&once->io, once_cb_io); 4763 ev_init (&once->io, once_cb_io);
1183 if (fd >= 0) 4764 if (fd >= 0)
4765 {
4766 ev_io_set (&once->io, fd, events);
4767 ev_io_start (EV_A_ &once->io);
4768 }
4769
4770 ev_init (&once->to, once_cb_to);
4771 if (timeout >= 0.)
4772 {
4773 ev_timer_set (&once->to, timeout, 0.);
4774 ev_timer_start (EV_A_ &once->to);
4775 }
4776}
4777
4778/*****************************************************************************/
4779
4780#if EV_WALK_ENABLE
4781void ecb_cold
4782ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4783{
4784 int i, j;
4785 ev_watcher_list *wl, *wn;
4786
4787 if (types & (EV_IO | EV_EMBED))
4788 for (i = 0; i < anfdmax; ++i)
4789 for (wl = anfds [i].head; wl; )
1184 { 4790 {
1185 ev_io_set (&once->io, fd, events); 4791 wn = wl->next;
1186 ev_io_start (&once->io); 4792
4793#if EV_EMBED_ENABLE
4794 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4795 {
4796 if (types & EV_EMBED)
4797 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4798 }
4799 else
4800#endif
4801#if EV_USE_INOTIFY
4802 if (ev_cb ((ev_io *)wl) == infy_cb)
4803 ;
4804 else
4805#endif
4806 if ((ev_io *)wl != &pipe_w)
4807 if (types & EV_IO)
4808 cb (EV_A_ EV_IO, wl);
4809
4810 wl = wn;
1187 } 4811 }
1188 4812
1189 ev_watcher_init (&once->to, once_cb_to); 4813 if (types & (EV_TIMER | EV_STAT))
1190 if (timeout >= 0.) 4814 for (i = timercnt + HEAP0; i-- > HEAP0; )
4815#if EV_STAT_ENABLE
4816 /*TODO: timer is not always active*/
4817 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1191 { 4818 {
1192 ev_timer_set (&once->to, timeout, 0.); 4819 if (types & EV_STAT)
1193 ev_timer_start (&once->to); 4820 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1194 } 4821 }
1195 } 4822 else
1196} 4823#endif
4824 if (types & EV_TIMER)
4825 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1197 4826
1198/*****************************************************************************/ 4827#if EV_PERIODIC_ENABLE
4828 if (types & EV_PERIODIC)
4829 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4830 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4831#endif
1199 4832
1200#if 0 4833#if EV_IDLE_ENABLE
4834 if (types & EV_IDLE)
4835 for (j = NUMPRI; j--; )
4836 for (i = idlecnt [j]; i--; )
4837 cb (EV_A_ EV_IDLE, idles [j][i]);
4838#endif
1201 4839
1202struct ev_io wio; 4840#if EV_FORK_ENABLE
4841 if (types & EV_FORK)
4842 for (i = forkcnt; i--; )
4843 if (ev_cb (forks [i]) != embed_fork_cb)
4844 cb (EV_A_ EV_FORK, forks [i]);
4845#endif
1203 4846
1204static void 4847#if EV_ASYNC_ENABLE
1205sin_cb (struct ev_io *w, int revents) 4848 if (types & EV_ASYNC)
1206{ 4849 for (i = asynccnt; i--; )
1207 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 4850 cb (EV_A_ EV_ASYNC, asyncs [i]);
1208} 4851#endif
1209 4852
1210static void 4853#if EV_PREPARE_ENABLE
1211ocb (struct ev_timer *w, int revents) 4854 if (types & EV_PREPARE)
1212{ 4855 for (i = preparecnt; i--; )
1213 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 4856# if EV_EMBED_ENABLE
1214 ev_timer_stop (w); 4857 if (ev_cb (prepares [i]) != embed_prepare_cb)
1215 ev_timer_start (w);
1216}
1217
1218static void
1219scb (struct ev_signal *w, int revents)
1220{
1221 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1222 ev_io_stop (&wio);
1223 ev_io_start (&wio);
1224}
1225
1226static void
1227gcb (struct ev_signal *w, int revents)
1228{
1229 fprintf (stderr, "generic %x\n", revents);
1230
1231}
1232
1233int main (void)
1234{
1235 ev_init (0);
1236
1237 ev_io_init (&wio, sin_cb, 0, EV_READ);
1238 ev_io_start (&wio);
1239
1240 struct ev_timer t[10000];
1241
1242#if 0
1243 int i;
1244 for (i = 0; i < 10000; ++i)
1245 {
1246 struct ev_timer *w = t + i;
1247 ev_watcher_init (w, ocb, i);
1248 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1249 ev_timer_start (w);
1250 if (drand48 () < 0.5)
1251 ev_timer_stop (w);
1252 }
1253#endif 4858# endif
1254 4859 cb (EV_A_ EV_PREPARE, prepares [i]);
1255 struct ev_timer t1;
1256 ev_timer_init (&t1, ocb, 5, 10);
1257 ev_timer_start (&t1);
1258
1259 struct ev_signal sig;
1260 ev_signal_init (&sig, scb, SIGQUIT);
1261 ev_signal_start (&sig);
1262
1263 struct ev_check cw;
1264 ev_check_init (&cw, gcb);
1265 ev_check_start (&cw);
1266
1267 struct ev_idle iw;
1268 ev_idle_init (&iw, gcb);
1269 ev_idle_start (&iw);
1270
1271 ev_loop (0);
1272
1273 return 0;
1274}
1275
1276#endif 4860#endif
1277 4861
4862#if EV_CHECK_ENABLE
4863 if (types & EV_CHECK)
4864 for (i = checkcnt; i--; )
4865 cb (EV_A_ EV_CHECK, checks [i]);
4866#endif
1278 4867
4868#if EV_SIGNAL_ENABLE
4869 if (types & EV_SIGNAL)
4870 for (i = 0; i < EV_NSIG - 1; ++i)
4871 for (wl = signals [i].head; wl; )
4872 {
4873 wn = wl->next;
4874 cb (EV_A_ EV_SIGNAL, wl);
4875 wl = wn;
4876 }
4877#endif
1279 4878
4879#if EV_CHILD_ENABLE
4880 if (types & EV_CHILD)
4881 for (i = (EV_PID_HASHSIZE); i--; )
4882 for (wl = childs [i]; wl; )
4883 {
4884 wn = wl->next;
4885 cb (EV_A_ EV_CHILD, wl);
4886 wl = wn;
4887 }
4888#endif
4889/* EV_STAT 0x00001000 /* stat data changed */
4890/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4891}
4892#endif
1280 4893
4894#if EV_MULTIPLICITY
4895 #include "ev_wrap.h"
4896#endif
4897

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