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Comparing libev/ev.c (file contents):
Revision 1.76 by root, Wed Nov 7 18:47:26 2007 UTC vs.
Revision 1.467 by root, Fri May 16 15:15:39 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 */
31#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H
44# else
32# include "config.h" 45# include "config.h"
46# endif
47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined EV_USE_CLOCK_SYSCALL
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
33 67
34# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
69# ifndef EV_USE_MONOTONIC
35# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
71# endif
72# ifndef EV_USE_REALTIME
36# define EV_USE_REALTIME 1 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
37# endif 82# endif
38 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
39# if HAVE_SELECT && HAVE_SYS_SELECT_H 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
40# define EV_USE_SELECT 1 99# define EV_USE_SELECT 0
41# endif 100# endif
42 101
43# if HAVE_POLL && HAVE_POLL_H 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
44# define EV_USE_POLL 1 108# define EV_USE_POLL 0
45# endif 109# endif
46 110
47# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 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
48# define EV_USE_EPOLL 1 117# define EV_USE_EPOLL 0
49# endif 118# endif
50 119
51# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 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
52# define EV_USE_KQUEUE 1 126# define EV_USE_KQUEUE 0
53# endif 127# endif
54 128
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
55#endif 136# endif
56 137
57#include <math.h> 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
58#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
59#include <fcntl.h> 169#include <fcntl.h>
60#include <stddef.h> 170#include <stddef.h>
61 171
62#include <stdio.h> 172#include <stdio.h>
63 173
64#include <assert.h> 174#include <assert.h>
65#include <errno.h> 175#include <errno.h>
66#include <sys/types.h> 176#include <sys/types.h>
67#include <time.h> 177#include <time.h>
178#include <limits.h>
68 179
69#include <signal.h> 180#include <signal.h>
70 181
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
71#ifndef WIN32 199#ifndef _WIN32
72# include <unistd.h>
73# include <sys/time.h> 200# include <sys/time.h>
74# 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
75#endif 210# endif
76/**/ 211# undef EV_AVOID_STDIO
212#endif
213
214/* OS X, in its infinite idiocy, actually HARDCODES
215 * a limit of 1024 into their select. Where people have brains,
216 * OS X engineers apparently have a vacuum. Or maybe they were
217 * ordered to have a vacuum, or they do anything for money.
218 * This might help. Or not.
219 */
220#define _DARWIN_UNLIMITED_SELECT 1
221
222/* this block tries to deduce configuration from header-defined symbols and defaults */
223
224/* try to deduce the maximum number of signals on this platform */
225#if defined EV_NSIG
226/* use what's provided */
227#elif defined NSIG
228# define EV_NSIG (NSIG)
229#elif defined _NSIG
230# define EV_NSIG (_NSIG)
231#elif defined SIGMAX
232# define EV_NSIG (SIGMAX+1)
233#elif defined SIG_MAX
234# define EV_NSIG (SIG_MAX+1)
235#elif defined _SIG_MAX
236# define EV_NSIG (_SIG_MAX+1)
237#elif defined MAXSIG
238# define EV_NSIG (MAXSIG+1)
239#elif defined MAX_SIG
240# define EV_NSIG (MAX_SIG+1)
241#elif defined SIGARRAYSIZE
242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
243#elif defined _sys_nsig
244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
245#else
246# define EV_NSIG (8 * sizeof (sigset_t) + 1)
247#endif
248
249#ifndef EV_USE_FLOOR
250# define EV_USE_FLOOR 0
251#endif
252
253#ifndef EV_USE_CLOCK_SYSCALL
254# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
255# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
256# else
257# define EV_USE_CLOCK_SYSCALL 0
258# endif
259#endif
77 260
78#ifndef EV_USE_MONOTONIC 261#ifndef EV_USE_MONOTONIC
262# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
263# define EV_USE_MONOTONIC EV_FEATURE_OS
264# else
79# define EV_USE_MONOTONIC 1 265# define EV_USE_MONOTONIC 0
266# endif
267#endif
268
269#ifndef EV_USE_REALTIME
270# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
271#endif
272
273#ifndef EV_USE_NANOSLEEP
274# if _POSIX_C_SOURCE >= 199309L
275# define EV_USE_NANOSLEEP EV_FEATURE_OS
276# else
277# define EV_USE_NANOSLEEP 0
278# endif
80#endif 279#endif
81 280
82#ifndef EV_USE_SELECT 281#ifndef EV_USE_SELECT
83# define EV_USE_SELECT 1 282# define EV_USE_SELECT EV_FEATURE_BACKENDS
84#endif 283#endif
85 284
86#ifndef EV_USE_POLL 285#ifndef EV_USE_POLL
87# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ 286# ifdef _WIN32
287# define EV_USE_POLL 0
288# else
289# define EV_USE_POLL EV_FEATURE_BACKENDS
290# endif
88#endif 291#endif
89 292
90#ifndef EV_USE_EPOLL 293#ifndef EV_USE_EPOLL
294# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
295# define EV_USE_EPOLL EV_FEATURE_BACKENDS
296# else
91# define EV_USE_EPOLL 0 297# define EV_USE_EPOLL 0
298# endif
92#endif 299#endif
93 300
94#ifndef EV_USE_KQUEUE 301#ifndef EV_USE_KQUEUE
95# define EV_USE_KQUEUE 0 302# define EV_USE_KQUEUE 0
96#endif 303#endif
97 304
305#ifndef EV_USE_PORT
306# define EV_USE_PORT 0
307#endif
308
98#ifndef EV_USE_WIN32 309#ifndef EV_USE_INOTIFY
99# ifdef WIN32 310# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
100# define EV_USE_WIN32 0 /* it does not exist, use select */ 311# define EV_USE_INOTIFY EV_FEATURE_OS
101# undef EV_USE_SELECT
102# define EV_USE_SELECT 1
103# else 312# else
104# define EV_USE_WIN32 0 313# define EV_USE_INOTIFY 0
105# endif 314# endif
106#endif 315#endif
107 316
317#ifndef EV_PID_HASHSIZE
318# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
319#endif
320
321#ifndef EV_INOTIFY_HASHSIZE
322# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
323#endif
324
108#ifndef EV_USE_REALTIME 325#ifndef EV_USE_EVENTFD
109# define EV_USE_REALTIME 1 326# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
327# define EV_USE_EVENTFD EV_FEATURE_OS
328# else
329# define EV_USE_EVENTFD 0
110#endif 330# endif
331#endif
111 332
112/**/ 333#ifndef EV_USE_SIGNALFD
334# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
335# define EV_USE_SIGNALFD EV_FEATURE_OS
336# else
337# define EV_USE_SIGNALFD 0
338# endif
339#endif
340
341#if 0 /* debugging */
342# define EV_VERIFY 3
343# define EV_USE_4HEAP 1
344# define EV_HEAP_CACHE_AT 1
345#endif
346
347#ifndef EV_VERIFY
348# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
349#endif
350
351#ifndef EV_USE_4HEAP
352# define EV_USE_4HEAP EV_FEATURE_DATA
353#endif
354
355#ifndef EV_HEAP_CACHE_AT
356# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
357#endif
358
359#ifdef ANDROID
360/* supposedly, android doesn't typedef fd_mask */
361# undef EV_USE_SELECT
362# define EV_USE_SELECT 0
363/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
364# undef EV_USE_CLOCK_SYSCALL
365# define EV_USE_CLOCK_SYSCALL 0
366#endif
367
368/* aix's poll.h seems to cause lots of trouble */
369#ifdef _AIX
370/* AIX has a completely broken poll.h header */
371# undef EV_USE_POLL
372# define EV_USE_POLL 0
373#endif
374
375/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
376/* which makes programs even slower. might work on other unices, too. */
377#if EV_USE_CLOCK_SYSCALL
378# include <sys/syscall.h>
379# ifdef SYS_clock_gettime
380# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
381# undef EV_USE_MONOTONIC
382# define EV_USE_MONOTONIC 1
383# else
384# undef EV_USE_CLOCK_SYSCALL
385# define EV_USE_CLOCK_SYSCALL 0
386# endif
387#endif
388
389/* this block fixes any misconfiguration where we know we run into trouble otherwise */
113 390
114#ifndef CLOCK_MONOTONIC 391#ifndef CLOCK_MONOTONIC
115# undef EV_USE_MONOTONIC 392# undef EV_USE_MONOTONIC
116# define EV_USE_MONOTONIC 0 393# define EV_USE_MONOTONIC 0
117#endif 394#endif
… …
119#ifndef CLOCK_REALTIME 396#ifndef CLOCK_REALTIME
120# undef EV_USE_REALTIME 397# undef EV_USE_REALTIME
121# define EV_USE_REALTIME 0 398# define EV_USE_REALTIME 0
122#endif 399#endif
123 400
401#if !EV_STAT_ENABLE
402# undef EV_USE_INOTIFY
403# define EV_USE_INOTIFY 0
404#endif
405
406#if !EV_USE_NANOSLEEP
407/* hp-ux has it in sys/time.h, which we unconditionally include above */
408# if !defined _WIN32 && !defined __hpux
409# include <sys/select.h>
410# endif
411#endif
412
413#if EV_USE_INOTIFY
414# include <sys/statfs.h>
415# include <sys/inotify.h>
416/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
417# ifndef IN_DONT_FOLLOW
418# undef EV_USE_INOTIFY
419# define EV_USE_INOTIFY 0
420# endif
421#endif
422
423#if EV_USE_EVENTFD
424/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
425# include <stdint.h>
426# ifndef EFD_NONBLOCK
427# define EFD_NONBLOCK O_NONBLOCK
428# endif
429# ifndef EFD_CLOEXEC
430# ifdef O_CLOEXEC
431# define EFD_CLOEXEC O_CLOEXEC
432# else
433# define EFD_CLOEXEC 02000000
434# endif
435# endif
436EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
437#endif
438
439#if EV_USE_SIGNALFD
440/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
441# include <stdint.h>
442# ifndef SFD_NONBLOCK
443# define SFD_NONBLOCK O_NONBLOCK
444# endif
445# ifndef SFD_CLOEXEC
446# ifdef O_CLOEXEC
447# define SFD_CLOEXEC O_CLOEXEC
448# else
449# define SFD_CLOEXEC 02000000
450# endif
451# endif
452EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
453
454struct signalfd_siginfo
455{
456 uint32_t ssi_signo;
457 char pad[128 - sizeof (uint32_t)];
458};
459#endif
460
124/**/ 461/**/
125 462
463#if EV_VERIFY >= 3
464# define EV_FREQUENT_CHECK ev_verify (EV_A)
465#else
466# define EV_FREQUENT_CHECK do { } while (0)
467#endif
468
469/*
470 * This is used to work around floating point rounding problems.
471 * This value is good at least till the year 4000.
472 */
473#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
474/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
475
126#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 476#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
127#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 477#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
128#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
129/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
130 478
131#include "ev.h" 479#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
480#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
132 481
482/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
483/* ECB.H BEGIN */
484/*
485 * libecb - http://software.schmorp.de/pkg/libecb
486 *
487 * Copyright (©) 2009-2014 Marc Alexander Lehmann <libecb@schmorp.de>
488 * Copyright (©) 2011 Emanuele Giaquinta
489 * All rights reserved.
490 *
491 * Redistribution and use in source and binary forms, with or without modifica-
492 * tion, are permitted provided that the following conditions are met:
493 *
494 * 1. Redistributions of source code must retain the above copyright notice,
495 * this list of conditions and the following disclaimer.
496 *
497 * 2. Redistributions in binary form must reproduce the above copyright
498 * notice, this list of conditions and the following disclaimer in the
499 * documentation and/or other materials provided with the distribution.
500 *
501 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
502 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
503 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
504 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
505 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
506 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
507 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
508 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
509 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
510 * OF THE POSSIBILITY OF SUCH DAMAGE.
511 *
512 * Alternatively, the contents of this file may be used under the terms of
513 * the GNU General Public License ("GPL") version 2 or any later version,
514 * in which case the provisions of the GPL are applicable instead of
515 * the above. If you wish to allow the use of your version of this file
516 * only under the terms of the GPL and not to allow others to use your
517 * version of this file under the BSD license, indicate your decision
518 * by deleting the provisions above and replace them with the notice
519 * and other provisions required by the GPL. If you do not delete the
520 * provisions above, a recipient may use your version of this file under
521 * either the BSD or the GPL.
522 */
523
524#ifndef ECB_H
525#define ECB_H
526
527/* 16 bits major, 16 bits minor */
528#define ECB_VERSION 0x00010003
529
530#ifdef _WIN32
531 typedef signed char int8_t;
532 typedef unsigned char uint8_t;
533 typedef signed short int16_t;
534 typedef unsigned short uint16_t;
535 typedef signed int int32_t;
536 typedef unsigned int uint32_t;
133#if __GNUC__ >= 3 537 #if __GNUC__
134# define expect(expr,value) __builtin_expect ((expr),(value)) 538 typedef signed long long int64_t;
135# define inline inline 539 typedef unsigned long long uint64_t;
540 #else /* _MSC_VER || __BORLANDC__ */
541 typedef signed __int64 int64_t;
542 typedef unsigned __int64 uint64_t;
543 #endif
544 #ifdef _WIN64
545 #define ECB_PTRSIZE 8
546 typedef uint64_t uintptr_t;
547 typedef int64_t intptr_t;
548 #else
549 #define ECB_PTRSIZE 4
550 typedef uint32_t uintptr_t;
551 typedef int32_t intptr_t;
552 #endif
136#else 553#else
137# define expect(expr,value) (expr) 554 #include <inttypes.h>
138# define inline static 555 #if UINTMAX_MAX > 0xffffffffU
556 #define ECB_PTRSIZE 8
557 #else
558 #define ECB_PTRSIZE 4
139#endif 559 #endif
560#endif
140 561
141#define expect_false(expr) expect ((expr) != 0, 0) 562/* work around x32 idiocy by defining proper macros */
142#define expect_true(expr) expect ((expr) != 0, 1) 563#if __amd64 || __x86_64 || _M_AMD64 || _M_X64
564 #if _ILP32
565 #define ECB_AMD64_X32 1
566 #else
567 #define ECB_AMD64 1
568 #endif
569#endif
143 570
144#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 571/* many compilers define _GNUC_ to some versions but then only implement
145#define ABSPRI(w) ((w)->priority - EV_MINPRI) 572 * what their idiot authors think are the "more important" extensions,
573 * causing enormous grief in return for some better fake benchmark numbers.
574 * or so.
575 * we try to detect these and simply assume they are not gcc - if they have
576 * an issue with that they should have done it right in the first place.
577 */
578#ifndef ECB_GCC_VERSION
579 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
580 #define ECB_GCC_VERSION(major,minor) 0
581 #else
582 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
583 #endif
584#endif
146 585
147typedef struct ev_watcher *W; 586#define ECB_CPP (__cplusplus+0)
148typedef struct ev_watcher_list *WL; 587#define ECB_CPP11 (__cplusplus >= 201103L)
149typedef struct ev_watcher_time *WT;
150 588
151static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 589#if ECB_CPP
590 #define ECB_C 0
591 #define ECB_STDC_VERSION 0
592#else
593 #define ECB_C 1
594 #define ECB_STDC_VERSION __STDC_VERSION__
595#endif
152 596
153#include "ev_win32.c" 597#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
598#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
599
600#if ECB_CPP
601 #define ECB_EXTERN_C extern "C"
602 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
603 #define ECB_EXTERN_C_END }
604#else
605 #define ECB_EXTERN_C extern
606 #define ECB_EXTERN_C_BEG
607 #define ECB_EXTERN_C_END
608#endif
154 609
155/*****************************************************************************/ 610/*****************************************************************************/
156 611
612/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
613/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
614
615#if ECB_NO_THREADS
616 #define ECB_NO_SMP 1
617#endif
618
619#if ECB_NO_SMP
620 #define ECB_MEMORY_FENCE do { } while (0)
621#endif
622
623#ifndef ECB_MEMORY_FENCE
624 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
625 #if __i386 || __i386__
626 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
627 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
628 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
629 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
630 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
631 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
632 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
633 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
634 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
635 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
636 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
637 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
638 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
639 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
640 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
641 #elif __aarch64__
642 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
643 #elif (__sparc || __sparc__) && !__sparcv8
644 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
645 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
646 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
647 #elif defined __s390__ || defined __s390x__
648 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
649 #elif defined __mips__
650 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
651 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
652 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
653 #elif defined __alpha__
654 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
655 #elif defined __hppa__
656 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
657 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
658 #elif defined __ia64__
659 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
660 #elif defined __m68k__
661 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
662 #elif defined __m88k__
663 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
664 #elif defined __sh__
665 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
666 #endif
667 #endif
668#endif
669
670#ifndef ECB_MEMORY_FENCE
671 #if ECB_GCC_VERSION(4,7)
672 /* see comment below (stdatomic.h) about the C11 memory model. */
673 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
674 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
675 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
676
677 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
678 * without risking compile time errors with other compilers. We *could*
679 * define our own ecb_clang_has_feature, but I just can't be bothered to work
680 * around this shit time and again.
681 * #elif defined __clang && __has_feature (cxx_atomic)
682 * // see comment below (stdatomic.h) about the C11 memory model.
683 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
684 * #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
685 * #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
686 */
687
688 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
689 #define ECB_MEMORY_FENCE __sync_synchronize ()
690 #elif _MSC_VER >= 1500 /* VC++ 2008 */
691 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
692 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
693 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
694 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
695 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
696 #elif _MSC_VER >= 1400 /* VC++ 2005 */
697 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
698 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
699 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
700 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
701 #elif defined _WIN32
702 #include <WinNT.h>
703 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
704 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
705 #include <mbarrier.h>
706 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
707 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
708 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
709 #elif __xlC__
710 #define ECB_MEMORY_FENCE __sync ()
711 #endif
712#endif
713
714#ifndef ECB_MEMORY_FENCE
715 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
716 /* we assume that these memory fences work on all variables/all memory accesses, */
717 /* not just C11 atomics and atomic accesses */
718 #include <stdatomic.h>
719 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
720 /* any fence other than seq_cst, which isn't very efficient for us. */
721 /* Why that is, we don't know - either the C11 memory model is quite useless */
722 /* for most usages, or gcc and clang have a bug */
723 /* I *currently* lean towards the latter, and inefficiently implement */
724 /* all three of ecb's fences as a seq_cst fence */
725 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
726 /* for all __atomic_thread_fence's except seq_cst */
727 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
728 #endif
729#endif
730
731#ifndef ECB_MEMORY_FENCE
732 #if !ECB_AVOID_PTHREADS
733 /*
734 * if you get undefined symbol references to pthread_mutex_lock,
735 * or failure to find pthread.h, then you should implement
736 * the ECB_MEMORY_FENCE operations for your cpu/compiler
737 * OR provide pthread.h and link against the posix thread library
738 * of your system.
739 */
740 #include <pthread.h>
741 #define ECB_NEEDS_PTHREADS 1
742 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
743
744 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
745 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
746 #endif
747#endif
748
749#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
750 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
751#endif
752
753#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
754 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
755#endif
756
757/*****************************************************************************/
758
759#if __cplusplus
760 #define ecb_inline static inline
761#elif ECB_GCC_VERSION(2,5)
762 #define ecb_inline static __inline__
763#elif ECB_C99
764 #define ecb_inline static inline
765#else
766 #define ecb_inline static
767#endif
768
769#if ECB_GCC_VERSION(3,3)
770 #define ecb_restrict __restrict__
771#elif ECB_C99
772 #define ecb_restrict restrict
773#else
774 #define ecb_restrict
775#endif
776
777typedef int ecb_bool;
778
779#define ECB_CONCAT_(a, b) a ## b
780#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
781#define ECB_STRINGIFY_(a) # a
782#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
783
784#define ecb_function_ ecb_inline
785
786#if ECB_GCC_VERSION(3,1)
787 #define ecb_attribute(attrlist) __attribute__(attrlist)
788 #define ecb_is_constant(expr) __builtin_constant_p (expr)
789 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
790 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
791#else
792 #define ecb_attribute(attrlist)
793
794 /* possible C11 impl for integral types
795 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
796 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
797
798 #define ecb_is_constant(expr) 0
799 #define ecb_expect(expr,value) (expr)
800 #define ecb_prefetch(addr,rw,locality)
801#endif
802
803/* no emulation for ecb_decltype */
804#if ECB_GCC_VERSION(4,5)
805 #define ecb_decltype(x) __decltype(x)
806#elif ECB_GCC_VERSION(3,0)
807 #define ecb_decltype(x) __typeof(x)
808#endif
809
810#define ecb_noinline ecb_attribute ((__noinline__))
811#define ecb_unused ecb_attribute ((__unused__))
812#define ecb_const ecb_attribute ((__const__))
813#define ecb_pure ecb_attribute ((__pure__))
814
815#if ECB_C11
816 #define ecb_noreturn _Noreturn
817#else
818 #define ecb_noreturn ecb_attribute ((__noreturn__))
819#endif
820
821#if ECB_GCC_VERSION(4,3)
822 #define ecb_artificial ecb_attribute ((__artificial__))
823 #define ecb_hot ecb_attribute ((__hot__))
824 #define ecb_cold ecb_attribute ((__cold__))
825#else
826 #define ecb_artificial
827 #define ecb_hot
828 #define ecb_cold
829#endif
830
831/* put around conditional expressions if you are very sure that the */
832/* expression is mostly true or mostly false. note that these return */
833/* booleans, not the expression. */
834#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
835#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
836/* for compatibility to the rest of the world */
837#define ecb_likely(expr) ecb_expect_true (expr)
838#define ecb_unlikely(expr) ecb_expect_false (expr)
839
840/* count trailing zero bits and count # of one bits */
841#if ECB_GCC_VERSION(3,4)
842 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
843 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
844 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
845 #define ecb_ctz32(x) __builtin_ctz (x)
846 #define ecb_ctz64(x) __builtin_ctzll (x)
847 #define ecb_popcount32(x) __builtin_popcount (x)
848 /* no popcountll */
849#else
850 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
851 ecb_function_ int
852 ecb_ctz32 (uint32_t x)
853 {
854 int r = 0;
855
856 x &= ~x + 1; /* this isolates the lowest bit */
857
858#if ECB_branchless_on_i386
859 r += !!(x & 0xaaaaaaaa) << 0;
860 r += !!(x & 0xcccccccc) << 1;
861 r += !!(x & 0xf0f0f0f0) << 2;
862 r += !!(x & 0xff00ff00) << 3;
863 r += !!(x & 0xffff0000) << 4;
864#else
865 if (x & 0xaaaaaaaa) r += 1;
866 if (x & 0xcccccccc) r += 2;
867 if (x & 0xf0f0f0f0) r += 4;
868 if (x & 0xff00ff00) r += 8;
869 if (x & 0xffff0000) r += 16;
870#endif
871
872 return r;
873 }
874
875 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
876 ecb_function_ int
877 ecb_ctz64 (uint64_t x)
878 {
879 int shift = x & 0xffffffffU ? 0 : 32;
880 return ecb_ctz32 (x >> shift) + shift;
881 }
882
883 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
884 ecb_function_ int
885 ecb_popcount32 (uint32_t x)
886 {
887 x -= (x >> 1) & 0x55555555;
888 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
889 x = ((x >> 4) + x) & 0x0f0f0f0f;
890 x *= 0x01010101;
891
892 return x >> 24;
893 }
894
895 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
896 ecb_function_ int ecb_ld32 (uint32_t x)
897 {
898 int r = 0;
899
900 if (x >> 16) { x >>= 16; r += 16; }
901 if (x >> 8) { x >>= 8; r += 8; }
902 if (x >> 4) { x >>= 4; r += 4; }
903 if (x >> 2) { x >>= 2; r += 2; }
904 if (x >> 1) { r += 1; }
905
906 return r;
907 }
908
909 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
910 ecb_function_ int ecb_ld64 (uint64_t x)
911 {
912 int r = 0;
913
914 if (x >> 32) { x >>= 32; r += 32; }
915
916 return r + ecb_ld32 (x);
917 }
918#endif
919
920ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
921ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
922ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
923ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
924
925ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
926ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
927{
928 return ( (x * 0x0802U & 0x22110U)
929 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
930}
931
932ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
933ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
934{
935 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
936 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
937 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
938 x = ( x >> 8 ) | ( x << 8);
939
940 return x;
941}
942
943ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
944ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
945{
946 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
947 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
948 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
949 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
950 x = ( x >> 16 ) | ( x << 16);
951
952 return x;
953}
954
955/* popcount64 is only available on 64 bit cpus as gcc builtin */
956/* so for this version we are lazy */
957ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
958ecb_function_ int
959ecb_popcount64 (uint64_t x)
960{
961 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
962}
963
964ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
965ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
966ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
967ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
968ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
969ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
970ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
971ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
972
973ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
974ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
975ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
976ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
977ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
978ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
979ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
980ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
981
982#if ECB_GCC_VERSION(4,3)
983 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
984 #define ecb_bswap32(x) __builtin_bswap32 (x)
985 #define ecb_bswap64(x) __builtin_bswap64 (x)
986#else
987 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
988 ecb_function_ uint16_t
989 ecb_bswap16 (uint16_t x)
990 {
991 return ecb_rotl16 (x, 8);
992 }
993
994 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
995 ecb_function_ uint32_t
996 ecb_bswap32 (uint32_t x)
997 {
998 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
999 }
1000
1001 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
1002 ecb_function_ uint64_t
1003 ecb_bswap64 (uint64_t x)
1004 {
1005 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1006 }
1007#endif
1008
1009#if ECB_GCC_VERSION(4,5)
1010 #define ecb_unreachable() __builtin_unreachable ()
1011#else
1012 /* this seems to work fine, but gcc always emits a warning for it :/ */
1013 ecb_inline void ecb_unreachable (void) ecb_noreturn;
1014 ecb_inline void ecb_unreachable (void) { }
1015#endif
1016
1017/* try to tell the compiler that some condition is definitely true */
1018#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1019
1020ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
1021ecb_inline unsigned char
1022ecb_byteorder_helper (void)
1023{
1024 /* the union code still generates code under pressure in gcc, */
1025 /* but less than using pointers, and always seems to */
1026 /* successfully return a constant. */
1027 /* the reason why we have this horrible preprocessor mess */
1028 /* is to avoid it in all cases, at least on common architectures */
1029 /* or when using a recent enough gcc version (>= 4.6) */
1030#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
1031 return 0x44;
1032#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
1033 return 0x44;
1034#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
1035 return 0x11;
1036#else
1037 union
1038 {
1039 uint32_t i;
1040 uint8_t c;
1041 } u = { 0x11223344 };
1042 return u.c;
1043#endif
1044}
1045
1046ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
1047ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1048ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
1049ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1050
1051#if ECB_GCC_VERSION(3,0) || ECB_C99
1052 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1053#else
1054 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1055#endif
1056
1057#if __cplusplus
1058 template<typename T>
1059 static inline T ecb_div_rd (T val, T div)
1060 {
1061 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1062 }
1063 template<typename T>
1064 static inline T ecb_div_ru (T val, T div)
1065 {
1066 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1067 }
1068#else
1069 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1070 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1071#endif
1072
1073#if ecb_cplusplus_does_not_suck
1074 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1075 template<typename T, int N>
1076 static inline int ecb_array_length (const T (&arr)[N])
1077 {
1078 return N;
1079 }
1080#else
1081 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1082#endif
1083
1084/*******************************************************************************/
1085/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1086
1087/* basically, everything uses "ieee pure-endian" floating point numbers */
1088/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1089#if 0 \
1090 || __i386 || __i386__ \
1091 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1092 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1093 || defined __s390__ || defined __s390x__ \
1094 || defined __mips__ \
1095 || defined __alpha__ \
1096 || defined __hppa__ \
1097 || defined __ia64__ \
1098 || defined __m68k__ \
1099 || defined __m88k__ \
1100 || defined __sh__ \
1101 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \
1102 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1103 || defined __aarch64__
1104 #define ECB_STDFP 1
1105 #include <string.h> /* for memcpy */
1106#else
1107 #define ECB_STDFP 0
1108#endif
1109
1110#ifndef ECB_NO_LIBM
1111
1112 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1113
1114 /* only the oldest of old doesn't have this one. solaris. */
1115 #ifdef INFINITY
1116 #define ECB_INFINITY INFINITY
1117 #else
1118 #define ECB_INFINITY HUGE_VAL
1119 #endif
1120
1121 #ifdef NAN
1122 #define ECB_NAN NAN
1123 #else
1124 #define ECB_NAN ECB_INFINITY
1125 #endif
1126
1127 /* converts an ieee half/binary16 to a float */
1128 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;
1129 ecb_function_ float
1130 ecb_binary16_to_float (uint16_t x)
1131 {
1132 int e = (x >> 10) & 0x1f;
1133 int m = x & 0x3ff;
1134 float r;
1135
1136 if (!e ) r = ldexpf (m , -24);
1137 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
1138 else if (m ) r = ECB_NAN;
1139 else r = ECB_INFINITY;
1140
1141 return x & 0x8000 ? -r : r;
1142 }
1143
1144 /* convert a float to ieee single/binary32 */
1145 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1146 ecb_function_ uint32_t
1147 ecb_float_to_binary32 (float x)
1148 {
1149 uint32_t r;
1150
1151 #if ECB_STDFP
1152 memcpy (&r, &x, 4);
1153 #else
1154 /* slow emulation, works for anything but -0 */
1155 uint32_t m;
1156 int e;
1157
1158 if (x == 0e0f ) return 0x00000000U;
1159 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1160 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1161 if (x != x ) return 0x7fbfffffU;
1162
1163 m = frexpf (x, &e) * 0x1000000U;
1164
1165 r = m & 0x80000000U;
1166
1167 if (r)
1168 m = -m;
1169
1170 if (e <= -126)
1171 {
1172 m &= 0xffffffU;
1173 m >>= (-125 - e);
1174 e = -126;
1175 }
1176
1177 r |= (e + 126) << 23;
1178 r |= m & 0x7fffffU;
1179 #endif
1180
1181 return r;
1182 }
1183
1184 /* converts an ieee single/binary32 to a float */
1185 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1186 ecb_function_ float
1187 ecb_binary32_to_float (uint32_t x)
1188 {
1189 float r;
1190
1191 #if ECB_STDFP
1192 memcpy (&r, &x, 4);
1193 #else
1194 /* emulation, only works for normals and subnormals and +0 */
1195 int neg = x >> 31;
1196 int e = (x >> 23) & 0xffU;
1197
1198 x &= 0x7fffffU;
1199
1200 if (e)
1201 x |= 0x800000U;
1202 else
1203 e = 1;
1204
1205 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1206 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1207
1208 r = neg ? -r : r;
1209 #endif
1210
1211 return r;
1212 }
1213
1214 /* convert a double to ieee double/binary64 */
1215 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1216 ecb_function_ uint64_t
1217 ecb_double_to_binary64 (double x)
1218 {
1219 uint64_t r;
1220
1221 #if ECB_STDFP
1222 memcpy (&r, &x, 8);
1223 #else
1224 /* slow emulation, works for anything but -0 */
1225 uint64_t m;
1226 int e;
1227
1228 if (x == 0e0 ) return 0x0000000000000000U;
1229 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1230 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1231 if (x != x ) return 0X7ff7ffffffffffffU;
1232
1233 m = frexp (x, &e) * 0x20000000000000U;
1234
1235 r = m & 0x8000000000000000;;
1236
1237 if (r)
1238 m = -m;
1239
1240 if (e <= -1022)
1241 {
1242 m &= 0x1fffffffffffffU;
1243 m >>= (-1021 - e);
1244 e = -1022;
1245 }
1246
1247 r |= ((uint64_t)(e + 1022)) << 52;
1248 r |= m & 0xfffffffffffffU;
1249 #endif
1250
1251 return r;
1252 }
1253
1254 /* converts an ieee double/binary64 to a double */
1255 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1256 ecb_function_ double
1257 ecb_binary64_to_double (uint64_t x)
1258 {
1259 double r;
1260
1261 #if ECB_STDFP
1262 memcpy (&r, &x, 8);
1263 #else
1264 /* emulation, only works for normals and subnormals and +0 */
1265 int neg = x >> 63;
1266 int e = (x >> 52) & 0x7ffU;
1267
1268 x &= 0xfffffffffffffU;
1269
1270 if (e)
1271 x |= 0x10000000000000U;
1272 else
1273 e = 1;
1274
1275 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1276 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1277
1278 r = neg ? -r : r;
1279 #endif
1280
1281 return r;
1282 }
1283
1284#endif
1285
1286#endif
1287
1288/* ECB.H END */
1289
1290#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1291/* if your architecture doesn't need memory fences, e.g. because it is
1292 * single-cpu/core, or if you use libev in a project that doesn't use libev
1293 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1294 * libev, in which cases the memory fences become nops.
1295 * alternatively, you can remove this #error and link against libpthread,
1296 * which will then provide the memory fences.
1297 */
1298# error "memory fences not defined for your architecture, please report"
1299#endif
1300
1301#ifndef ECB_MEMORY_FENCE
1302# define ECB_MEMORY_FENCE do { } while (0)
1303# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1304# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1305#endif
1306
1307#define expect_false(cond) ecb_expect_false (cond)
1308#define expect_true(cond) ecb_expect_true (cond)
1309#define noinline ecb_noinline
1310
1311#define inline_size ecb_inline
1312
1313#if EV_FEATURE_CODE
1314# define inline_speed ecb_inline
1315#else
1316# define inline_speed static noinline
1317#endif
1318
1319#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1320
1321#if EV_MINPRI == EV_MAXPRI
1322# define ABSPRI(w) (((W)w), 0)
1323#else
1324# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1325#endif
1326
1327#define EMPTY /* required for microsofts broken pseudo-c compiler */
1328#define EMPTY2(a,b) /* used to suppress some warnings */
1329
1330typedef ev_watcher *W;
1331typedef ev_watcher_list *WL;
1332typedef ev_watcher_time *WT;
1333
1334#define ev_active(w) ((W)(w))->active
1335#define ev_at(w) ((WT)(w))->at
1336
1337#if EV_USE_REALTIME
1338/* sig_atomic_t is used to avoid per-thread variables or locking but still */
1339/* giving it a reasonably high chance of working on typical architectures */
1340static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1341#endif
1342
1343#if EV_USE_MONOTONIC
1344static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1345#endif
1346
1347#ifndef EV_FD_TO_WIN32_HANDLE
1348# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1349#endif
1350#ifndef EV_WIN32_HANDLE_TO_FD
1351# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1352#endif
1353#ifndef EV_WIN32_CLOSE_FD
1354# define EV_WIN32_CLOSE_FD(fd) close (fd)
1355#endif
1356
1357#ifdef _WIN32
1358# include "ev_win32.c"
1359#endif
1360
1361/*****************************************************************************/
1362
1363/* define a suitable floor function (only used by periodics atm) */
1364
1365#if EV_USE_FLOOR
1366# include <math.h>
1367# define ev_floor(v) floor (v)
1368#else
1369
1370#include <float.h>
1371
1372/* a floor() replacement function, should be independent of ev_tstamp type */
1373static ev_tstamp noinline
1374ev_floor (ev_tstamp v)
1375{
1376 /* the choice of shift factor is not terribly important */
1377#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1378 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1379#else
1380 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1381#endif
1382
1383 /* argument too large for an unsigned long? */
1384 if (expect_false (v >= shift))
1385 {
1386 ev_tstamp f;
1387
1388 if (v == v - 1.)
1389 return v; /* very large number */
1390
1391 f = shift * ev_floor (v * (1. / shift));
1392 return f + ev_floor (v - f);
1393 }
1394
1395 /* special treatment for negative args? */
1396 if (expect_false (v < 0.))
1397 {
1398 ev_tstamp f = -ev_floor (-v);
1399
1400 return f - (f == v ? 0 : 1);
1401 }
1402
1403 /* fits into an unsigned long */
1404 return (unsigned long)v;
1405}
1406
1407#endif
1408
1409/*****************************************************************************/
1410
1411#ifdef __linux
1412# include <sys/utsname.h>
1413#endif
1414
1415static unsigned int noinline ecb_cold
1416ev_linux_version (void)
1417{
1418#ifdef __linux
1419 unsigned int v = 0;
1420 struct utsname buf;
1421 int i;
1422 char *p = buf.release;
1423
1424 if (uname (&buf))
1425 return 0;
1426
1427 for (i = 3+1; --i; )
1428 {
1429 unsigned int c = 0;
1430
1431 for (;;)
1432 {
1433 if (*p >= '0' && *p <= '9')
1434 c = c * 10 + *p++ - '0';
1435 else
1436 {
1437 p += *p == '.';
1438 break;
1439 }
1440 }
1441
1442 v = (v << 8) | c;
1443 }
1444
1445 return v;
1446#else
1447 return 0;
1448#endif
1449}
1450
1451/*****************************************************************************/
1452
1453#if EV_AVOID_STDIO
1454static void noinline ecb_cold
1455ev_printerr (const char *msg)
1456{
1457 write (STDERR_FILENO, msg, strlen (msg));
1458}
1459#endif
1460
157static void (*syserr_cb)(const char *msg); 1461static void (*syserr_cb)(const char *msg) EV_THROW;
158 1462
1463void ecb_cold
159void ev_set_syserr_cb (void (*cb)(const char *msg)) 1464ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
160{ 1465{
161 syserr_cb = cb; 1466 syserr_cb = cb;
162} 1467}
163 1468
164static void 1469static void noinline ecb_cold
165syserr (const char *msg) 1470ev_syserr (const char *msg)
166{ 1471{
167 if (!msg) 1472 if (!msg)
168 msg = "(libev) system error"; 1473 msg = "(libev) system error";
169 1474
170 if (syserr_cb) 1475 if (syserr_cb)
171 syserr_cb (msg); 1476 syserr_cb (msg);
172 else 1477 else
173 { 1478 {
1479#if EV_AVOID_STDIO
1480 ev_printerr (msg);
1481 ev_printerr (": ");
1482 ev_printerr (strerror (errno));
1483 ev_printerr ("\n");
1484#else
174 perror (msg); 1485 perror (msg);
1486#endif
175 abort (); 1487 abort ();
176 } 1488 }
177} 1489}
178 1490
1491static void *
1492ev_realloc_emul (void *ptr, long size) EV_THROW
1493{
1494 /* some systems, notably openbsd and darwin, fail to properly
1495 * implement realloc (x, 0) (as required by both ansi c-89 and
1496 * the single unix specification, so work around them here.
1497 * recently, also (at least) fedora and debian started breaking it,
1498 * despite documenting it otherwise.
1499 */
1500
1501 if (size)
1502 return realloc (ptr, size);
1503
1504 free (ptr);
1505 return 0;
1506}
1507
179static void *(*alloc)(void *ptr, long size); 1508static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
180 1509
1510void ecb_cold
181void ev_set_allocator (void *(*cb)(void *ptr, long size)) 1511ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
182{ 1512{
183 alloc = cb; 1513 alloc = cb;
184} 1514}
185 1515
186static void * 1516inline_speed void *
187ev_realloc (void *ptr, long size) 1517ev_realloc (void *ptr, long size)
188{ 1518{
189 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1519 ptr = alloc (ptr, size);
190 1520
191 if (!ptr && size) 1521 if (!ptr && size)
192 { 1522 {
1523#if EV_AVOID_STDIO
1524 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1525#else
193 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1526 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1527#endif
194 abort (); 1528 abort ();
195 } 1529 }
196 1530
197 return ptr; 1531 return ptr;
198} 1532}
… …
200#define ev_malloc(size) ev_realloc (0, (size)) 1534#define ev_malloc(size) ev_realloc (0, (size))
201#define ev_free(ptr) ev_realloc ((ptr), 0) 1535#define ev_free(ptr) ev_realloc ((ptr), 0)
202 1536
203/*****************************************************************************/ 1537/*****************************************************************************/
204 1538
1539/* set in reify when reification needed */
1540#define EV_ANFD_REIFY 1
1541
1542/* file descriptor info structure */
205typedef struct 1543typedef struct
206{ 1544{
207 WL head; 1545 WL head;
208 unsigned char events; 1546 unsigned char events; /* the events watched for */
1547 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1548 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
209 unsigned char reify; 1549 unsigned char unused;
1550#if EV_USE_EPOLL
1551 unsigned int egen; /* generation counter to counter epoll bugs */
1552#endif
1553#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1554 SOCKET handle;
1555#endif
1556#if EV_USE_IOCP
1557 OVERLAPPED or, ow;
1558#endif
210} ANFD; 1559} ANFD;
211 1560
1561/* stores the pending event set for a given watcher */
212typedef struct 1562typedef struct
213{ 1563{
214 W w; 1564 W w;
215 int events; 1565 int events; /* the pending event set for the given watcher */
216} ANPENDING; 1566} ANPENDING;
217 1567
1568#if EV_USE_INOTIFY
1569/* hash table entry per inotify-id */
1570typedef struct
1571{
1572 WL head;
1573} ANFS;
1574#endif
1575
1576/* Heap Entry */
1577#if EV_HEAP_CACHE_AT
1578 /* a heap element */
1579 typedef struct {
1580 ev_tstamp at;
1581 WT w;
1582 } ANHE;
1583
1584 #define ANHE_w(he) (he).w /* access watcher, read-write */
1585 #define ANHE_at(he) (he).at /* access cached at, read-only */
1586 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1587#else
1588 /* a heap element */
1589 typedef WT ANHE;
1590
1591 #define ANHE_w(he) (he)
1592 #define ANHE_at(he) (he)->at
1593 #define ANHE_at_cache(he)
1594#endif
1595
218#if EV_MULTIPLICITY 1596#if EV_MULTIPLICITY
219 1597
220struct ev_loop 1598 struct ev_loop
221{ 1599 {
1600 ev_tstamp ev_rt_now;
1601 #define ev_rt_now ((loop)->ev_rt_now)
222# define VAR(name,decl) decl; 1602 #define VAR(name,decl) decl;
223# include "ev_vars.h" 1603 #include "ev_vars.h"
224};
225# undef VAR 1604 #undef VAR
1605 };
226# include "ev_wrap.h" 1606 #include "ev_wrap.h"
1607
1608 static struct ev_loop default_loop_struct;
1609 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
227 1610
228#else 1611#else
229 1612
1613 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
230# define VAR(name,decl) static decl; 1614 #define VAR(name,decl) static decl;
231# include "ev_vars.h" 1615 #include "ev_vars.h"
232# undef VAR 1616 #undef VAR
233 1617
1618 static int ev_default_loop_ptr;
1619
234#endif 1620#endif
1621
1622#if EV_FEATURE_API
1623# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1624# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1625# define EV_INVOKE_PENDING invoke_cb (EV_A)
1626#else
1627# define EV_RELEASE_CB (void)0
1628# define EV_ACQUIRE_CB (void)0
1629# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1630#endif
1631
1632#define EVBREAK_RECURSE 0x80
235 1633
236/*****************************************************************************/ 1634/*****************************************************************************/
237 1635
238inline ev_tstamp 1636#ifndef EV_HAVE_EV_TIME
1637ev_tstamp
239ev_time (void) 1638ev_time (void) EV_THROW
240{ 1639{
241#if EV_USE_REALTIME 1640#if EV_USE_REALTIME
1641 if (expect_true (have_realtime))
1642 {
242 struct timespec ts; 1643 struct timespec ts;
243 clock_gettime (CLOCK_REALTIME, &ts); 1644 clock_gettime (CLOCK_REALTIME, &ts);
244 return ts.tv_sec + ts.tv_nsec * 1e-9; 1645 return ts.tv_sec + ts.tv_nsec * 1e-9;
245#else 1646 }
1647#endif
1648
246 struct timeval tv; 1649 struct timeval tv;
247 gettimeofday (&tv, 0); 1650 gettimeofday (&tv, 0);
248 return tv.tv_sec + tv.tv_usec * 1e-6; 1651 return tv.tv_sec + tv.tv_usec * 1e-6;
249#endif
250} 1652}
1653#endif
251 1654
252inline ev_tstamp 1655inline_size ev_tstamp
253get_clock (void) 1656get_clock (void)
254{ 1657{
255#if EV_USE_MONOTONIC 1658#if EV_USE_MONOTONIC
256 if (expect_true (have_monotonic)) 1659 if (expect_true (have_monotonic))
257 { 1660 {
… …
262#endif 1665#endif
263 1666
264 return ev_time (); 1667 return ev_time ();
265} 1668}
266 1669
1670#if EV_MULTIPLICITY
267ev_tstamp 1671ev_tstamp
268ev_now (EV_P) 1672ev_now (EV_P) EV_THROW
269{ 1673{
270 return rt_now; 1674 return ev_rt_now;
271} 1675}
1676#endif
272 1677
273#define array_roundsize(type,n) ((n) | 4 & ~3) 1678void
1679ev_sleep (ev_tstamp delay) EV_THROW
1680{
1681 if (delay > 0.)
1682 {
1683#if EV_USE_NANOSLEEP
1684 struct timespec ts;
1685
1686 EV_TS_SET (ts, delay);
1687 nanosleep (&ts, 0);
1688#elif defined _WIN32
1689 Sleep ((unsigned long)(delay * 1e3));
1690#else
1691 struct timeval tv;
1692
1693 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1694 /* something not guaranteed by newer posix versions, but guaranteed */
1695 /* by older ones */
1696 EV_TV_SET (tv, delay);
1697 select (0, 0, 0, 0, &tv);
1698#endif
1699 }
1700}
1701
1702/*****************************************************************************/
1703
1704#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1705
1706/* find a suitable new size for the given array, */
1707/* hopefully by rounding to a nice-to-malloc size */
1708inline_size int
1709array_nextsize (int elem, int cur, int cnt)
1710{
1711 int ncur = cur + 1;
1712
1713 do
1714 ncur <<= 1;
1715 while (cnt > ncur);
1716
1717 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
1718 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
1719 {
1720 ncur *= elem;
1721 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
1722 ncur = ncur - sizeof (void *) * 4;
1723 ncur /= elem;
1724 }
1725
1726 return ncur;
1727}
1728
1729static void * noinline ecb_cold
1730array_realloc (int elem, void *base, int *cur, int cnt)
1731{
1732 *cur = array_nextsize (elem, *cur, cnt);
1733 return ev_realloc (base, elem * *cur);
1734}
1735
1736#define array_init_zero(base,count) \
1737 memset ((void *)(base), 0, sizeof (*(base)) * (count))
274 1738
275#define array_needsize(type,base,cur,cnt,init) \ 1739#define array_needsize(type,base,cur,cnt,init) \
276 if (expect_false ((cnt) > cur)) \ 1740 if (expect_false ((cnt) > (cur))) \
277 { \ 1741 { \
278 int newcnt = cur; \ 1742 int ecb_unused ocur_ = (cur); \
279 do \ 1743 (base) = (type *)array_realloc \
280 { \ 1744 (sizeof (type), (base), &(cur), (cnt)); \
281 newcnt = array_roundsize (type, newcnt << 1); \ 1745 init ((base) + (ocur_), (cur) - ocur_); \
282 } \
283 while ((cnt) > newcnt); \
284 \
285 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
286 init (base + cur, newcnt - cur); \
287 cur = newcnt; \
288 } 1746 }
289 1747
1748#if 0
290#define array_slim(type,stem) \ 1749#define array_slim(type,stem) \
291 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 1750 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
292 { \ 1751 { \
293 stem ## max = array_roundsize (stem ## cnt >> 1); \ 1752 stem ## max = array_roundsize (stem ## cnt >> 1); \
294 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 1753 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
295 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1754 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
296 } 1755 }
297 1756#endif
298/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
299/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
300#define array_free_microshit(stem) \
301 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
302 1757
303#define array_free(stem, idx) \ 1758#define array_free(stem, idx) \
304 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1759 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
305 1760
306/*****************************************************************************/ 1761/*****************************************************************************/
307 1762
308static void 1763/* dummy callback for pending events */
309anfds_init (ANFD *base, int count) 1764static void noinline
1765pendingcb (EV_P_ ev_prepare *w, int revents)
310{ 1766{
311 while (count--) 1767}
312 {
313 base->head = 0;
314 base->events = EV_NONE;
315 base->reify = 0;
316 1768
317 ++base; 1769void noinline
1770ev_feed_event (EV_P_ void *w, int revents) EV_THROW
1771{
1772 W w_ = (W)w;
1773 int pri = ABSPRI (w_);
1774
1775 if (expect_false (w_->pending))
1776 pendings [pri][w_->pending - 1].events |= revents;
1777 else
318 } 1778 {
319} 1779 w_->pending = ++pendingcnt [pri];
320 1780 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
321static void 1781 pendings [pri][w_->pending - 1].w = w_;
322event (EV_P_ W w, int events)
323{
324 if (w->pending)
325 {
326 pendings [ABSPRI (w)][w->pending - 1].events |= events; 1782 pendings [pri][w_->pending - 1].events = revents;
327 return;
328 } 1783 }
329 1784
330 w->pending = ++pendingcnt [ABSPRI (w)]; 1785 pendingpri = NUMPRI - 1;
331 array_needsize (ANPENDING, pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
332 pendings [ABSPRI (w)][w->pending - 1].w = w;
333 pendings [ABSPRI (w)][w->pending - 1].events = events;
334} 1786}
335 1787
336static void 1788inline_speed void
1789feed_reverse (EV_P_ W w)
1790{
1791 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1792 rfeeds [rfeedcnt++] = w;
1793}
1794
1795inline_size void
1796feed_reverse_done (EV_P_ int revents)
1797{
1798 do
1799 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1800 while (rfeedcnt);
1801}
1802
1803inline_speed void
337queue_events (EV_P_ W *events, int eventcnt, int type) 1804queue_events (EV_P_ W *events, int eventcnt, int type)
338{ 1805{
339 int i; 1806 int i;
340 1807
341 for (i = 0; i < eventcnt; ++i) 1808 for (i = 0; i < eventcnt; ++i)
342 event (EV_A_ events [i], type); 1809 ev_feed_event (EV_A_ events [i], type);
343} 1810}
344 1811
345static void 1812/*****************************************************************************/
1813
1814inline_speed void
346fd_event (EV_P_ int fd, int events) 1815fd_event_nocheck (EV_P_ int fd, int revents)
347{ 1816{
348 ANFD *anfd = anfds + fd; 1817 ANFD *anfd = anfds + fd;
349 struct ev_io *w; 1818 ev_io *w;
350 1819
351 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 1820 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
352 { 1821 {
353 int ev = w->events & events; 1822 int ev = w->events & revents;
354 1823
355 if (ev) 1824 if (ev)
356 event (EV_A_ (W)w, ev); 1825 ev_feed_event (EV_A_ (W)w, ev);
357 } 1826 }
358} 1827}
359 1828
360/*****************************************************************************/ 1829/* do not submit kernel events for fds that have reify set */
1830/* because that means they changed while we were polling for new events */
1831inline_speed void
1832fd_event (EV_P_ int fd, int revents)
1833{
1834 ANFD *anfd = anfds + fd;
361 1835
362static void 1836 if (expect_true (!anfd->reify))
1837 fd_event_nocheck (EV_A_ fd, revents);
1838}
1839
1840void
1841ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
1842{
1843 if (fd >= 0 && fd < anfdmax)
1844 fd_event_nocheck (EV_A_ fd, revents);
1845}
1846
1847/* make sure the external fd watch events are in-sync */
1848/* with the kernel/libev internal state */
1849inline_size void
363fd_reify (EV_P) 1850fd_reify (EV_P)
364{ 1851{
365 int i; 1852 int i;
366 1853
1854#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
367 for (i = 0; i < fdchangecnt; ++i) 1855 for (i = 0; i < fdchangecnt; ++i)
368 { 1856 {
369 int fd = fdchanges [i]; 1857 int fd = fdchanges [i];
370 ANFD *anfd = anfds + fd; 1858 ANFD *anfd = anfds + fd;
1859
1860 if (anfd->reify & EV__IOFDSET && anfd->head)
1861 {
1862 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1863
1864 if (handle != anfd->handle)
1865 {
1866 unsigned long arg;
1867
1868 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1869
1870 /* handle changed, but fd didn't - we need to do it in two steps */
1871 backend_modify (EV_A_ fd, anfd->events, 0);
1872 anfd->events = 0;
1873 anfd->handle = handle;
1874 }
1875 }
1876 }
1877#endif
1878
1879 for (i = 0; i < fdchangecnt; ++i)
1880 {
1881 int fd = fdchanges [i];
1882 ANFD *anfd = anfds + fd;
371 struct ev_io *w; 1883 ev_io *w;
372 1884
373 int events = 0; 1885 unsigned char o_events = anfd->events;
1886 unsigned char o_reify = anfd->reify;
374 1887
375 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
376 events |= w->events;
377
378 anfd->reify = 0; 1888 anfd->reify = 0;
379 1889
380 method_modify (EV_A_ fd, anfd->events, events); 1890 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1891 {
381 anfd->events = events; 1892 anfd->events = 0;
1893
1894 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1895 anfd->events |= (unsigned char)w->events;
1896
1897 if (o_events != anfd->events)
1898 o_reify = EV__IOFDSET; /* actually |= */
1899 }
1900
1901 if (o_reify & EV__IOFDSET)
1902 backend_modify (EV_A_ fd, o_events, anfd->events);
382 } 1903 }
383 1904
384 fdchangecnt = 0; 1905 fdchangecnt = 0;
385} 1906}
386 1907
387static void 1908/* something about the given fd changed */
1909inline_size void
388fd_change (EV_P_ int fd) 1910fd_change (EV_P_ int fd, int flags)
389{ 1911{
390 if (anfds [fd].reify) 1912 unsigned char reify = anfds [fd].reify;
391 return;
392
393 anfds [fd].reify = 1; 1913 anfds [fd].reify |= flags;
394 1914
1915 if (expect_true (!reify))
1916 {
395 ++fdchangecnt; 1917 ++fdchangecnt;
396 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); 1918 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
397 fdchanges [fdchangecnt - 1] = fd; 1919 fdchanges [fdchangecnt - 1] = fd;
1920 }
398} 1921}
399 1922
400static void 1923/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1924inline_speed void ecb_cold
401fd_kill (EV_P_ int fd) 1925fd_kill (EV_P_ int fd)
402{ 1926{
403 struct ev_io *w; 1927 ev_io *w;
404 1928
405 while ((w = (struct ev_io *)anfds [fd].head)) 1929 while ((w = (ev_io *)anfds [fd].head))
406 { 1930 {
407 ev_io_stop (EV_A_ w); 1931 ev_io_stop (EV_A_ w);
408 event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1932 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
409 } 1933 }
410} 1934}
411 1935
412static int 1936/* check whether the given fd is actually valid, for error recovery */
1937inline_size int ecb_cold
413fd_valid (int fd) 1938fd_valid (int fd)
414{ 1939{
415#ifdef WIN32 1940#ifdef _WIN32
416 return !!win32_get_osfhandle (fd); 1941 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
417#else 1942#else
418 return fcntl (fd, F_GETFD) != -1; 1943 return fcntl (fd, F_GETFD) != -1;
419#endif 1944#endif
420} 1945}
421 1946
422/* called on EBADF to verify fds */ 1947/* called on EBADF to verify fds */
423static void 1948static void noinline ecb_cold
424fd_ebadf (EV_P) 1949fd_ebadf (EV_P)
425{ 1950{
426 int fd; 1951 int fd;
427 1952
428 for (fd = 0; fd < anfdmax; ++fd) 1953 for (fd = 0; fd < anfdmax; ++fd)
429 if (anfds [fd].events) 1954 if (anfds [fd].events)
430 if (!fd_valid (fd) == -1 && errno == EBADF) 1955 if (!fd_valid (fd) && errno == EBADF)
431 fd_kill (EV_A_ fd); 1956 fd_kill (EV_A_ fd);
432} 1957}
433 1958
434/* called on ENOMEM in select/poll to kill some fds and retry */ 1959/* called on ENOMEM in select/poll to kill some fds and retry */
435static void 1960static void noinline ecb_cold
436fd_enomem (EV_P) 1961fd_enomem (EV_P)
437{ 1962{
438 int fd; 1963 int fd;
439 1964
440 for (fd = anfdmax; fd--; ) 1965 for (fd = anfdmax; fd--; )
441 if (anfds [fd].events) 1966 if (anfds [fd].events)
442 { 1967 {
443 fd_kill (EV_A_ fd); 1968 fd_kill (EV_A_ fd);
444 return; 1969 break;
445 } 1970 }
446} 1971}
447 1972
448/* usually called after fork if method needs to re-arm all fds from scratch */ 1973/* usually called after fork if backend needs to re-arm all fds from scratch */
449static void 1974static void noinline
450fd_rearm_all (EV_P) 1975fd_rearm_all (EV_P)
451{ 1976{
452 int fd; 1977 int fd;
453 1978
454 /* this should be highly optimised to not do anything but set a flag */
455 for (fd = 0; fd < anfdmax; ++fd) 1979 for (fd = 0; fd < anfdmax; ++fd)
456 if (anfds [fd].events) 1980 if (anfds [fd].events)
457 { 1981 {
458 anfds [fd].events = 0; 1982 anfds [fd].events = 0;
459 fd_change (EV_A_ fd); 1983 anfds [fd].emask = 0;
1984 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
460 } 1985 }
461} 1986}
462 1987
1988/* used to prepare libev internal fd's */
1989/* this is not fork-safe */
1990inline_speed void
1991fd_intern (int fd)
1992{
1993#ifdef _WIN32
1994 unsigned long arg = 1;
1995 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1996#else
1997 fcntl (fd, F_SETFD, FD_CLOEXEC);
1998 fcntl (fd, F_SETFL, O_NONBLOCK);
1999#endif
2000}
2001
463/*****************************************************************************/ 2002/*****************************************************************************/
464 2003
2004/*
2005 * the heap functions want a real array index. array index 0 is guaranteed to not
2006 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
2007 * the branching factor of the d-tree.
2008 */
2009
2010/*
2011 * at the moment we allow libev the luxury of two heaps,
2012 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
2013 * which is more cache-efficient.
2014 * the difference is about 5% with 50000+ watchers.
2015 */
2016#if EV_USE_4HEAP
2017
2018#define DHEAP 4
2019#define HEAP0 (DHEAP - 1) /* index of first element in heap */
2020#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
2021#define UPHEAP_DONE(p,k) ((p) == (k))
2022
2023/* away from the root */
2024inline_speed void
2025downheap (ANHE *heap, int N, int k)
2026{
2027 ANHE he = heap [k];
2028 ANHE *E = heap + N + HEAP0;
2029
2030 for (;;)
2031 {
2032 ev_tstamp minat;
2033 ANHE *minpos;
2034 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
2035
2036 /* find minimum child */
2037 if (expect_true (pos + DHEAP - 1 < E))
2038 {
2039 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2040 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2041 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2042 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2043 }
2044 else if (pos < E)
2045 {
2046 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2047 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2048 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2049 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2050 }
2051 else
2052 break;
2053
2054 if (ANHE_at (he) <= minat)
2055 break;
2056
2057 heap [k] = *minpos;
2058 ev_active (ANHE_w (*minpos)) = k;
2059
2060 k = minpos - heap;
2061 }
2062
2063 heap [k] = he;
2064 ev_active (ANHE_w (he)) = k;
2065}
2066
2067#else /* 4HEAP */
2068
2069#define HEAP0 1
2070#define HPARENT(k) ((k) >> 1)
2071#define UPHEAP_DONE(p,k) (!(p))
2072
2073/* away from the root */
2074inline_speed void
2075downheap (ANHE *heap, int N, int k)
2076{
2077 ANHE he = heap [k];
2078
2079 for (;;)
2080 {
2081 int c = k << 1;
2082
2083 if (c >= N + HEAP0)
2084 break;
2085
2086 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
2087 ? 1 : 0;
2088
2089 if (ANHE_at (he) <= ANHE_at (heap [c]))
2090 break;
2091
2092 heap [k] = heap [c];
2093 ev_active (ANHE_w (heap [k])) = k;
2094
2095 k = c;
2096 }
2097
2098 heap [k] = he;
2099 ev_active (ANHE_w (he)) = k;
2100}
2101#endif
2102
2103/* towards the root */
2104inline_speed void
2105upheap (ANHE *heap, int k)
2106{
2107 ANHE he = heap [k];
2108
2109 for (;;)
2110 {
2111 int p = HPARENT (k);
2112
2113 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
2114 break;
2115
2116 heap [k] = heap [p];
2117 ev_active (ANHE_w (heap [k])) = k;
2118 k = p;
2119 }
2120
2121 heap [k] = he;
2122 ev_active (ANHE_w (he)) = k;
2123}
2124
2125/* move an element suitably so it is in a correct place */
2126inline_size void
2127adjustheap (ANHE *heap, int N, int k)
2128{
2129 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
2130 upheap (heap, k);
2131 else
2132 downheap (heap, N, k);
2133}
2134
2135/* rebuild the heap: this function is used only once and executed rarely */
2136inline_size void
2137reheap (ANHE *heap, int N)
2138{
2139 int i;
2140
2141 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
2142 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
2143 for (i = 0; i < N; ++i)
2144 upheap (heap, i + HEAP0);
2145}
2146
2147/*****************************************************************************/
2148
2149/* associate signal watchers to a signal signal */
2150typedef struct
2151{
2152 EV_ATOMIC_T pending;
2153#if EV_MULTIPLICITY
2154 EV_P;
2155#endif
2156 WL head;
2157} ANSIG;
2158
2159static ANSIG signals [EV_NSIG - 1];
2160
2161/*****************************************************************************/
2162
2163#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2164
2165static void noinline ecb_cold
2166evpipe_init (EV_P)
2167{
2168 if (!ev_is_active (&pipe_w))
2169 {
2170 int fds [2];
2171
2172# if EV_USE_EVENTFD
2173 fds [0] = -1;
2174 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2175 if (fds [1] < 0 && errno == EINVAL)
2176 fds [1] = eventfd (0, 0);
2177
2178 if (fds [1] < 0)
2179# endif
2180 {
2181 while (pipe (fds))
2182 ev_syserr ("(libev) error creating signal/async pipe");
2183
2184 fd_intern (fds [0]);
2185 }
2186
2187 evpipe [0] = fds [0];
2188
2189 if (evpipe [1] < 0)
2190 evpipe [1] = fds [1]; /* first call, set write fd */
2191 else
2192 {
2193 /* on subsequent calls, do not change evpipe [1] */
2194 /* so that evpipe_write can always rely on its value. */
2195 /* this branch does not do anything sensible on windows, */
2196 /* so must not be executed on windows */
2197
2198 dup2 (fds [1], evpipe [1]);
2199 close (fds [1]);
2200 }
2201
2202 fd_intern (evpipe [1]);
2203
2204 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2205 ev_io_start (EV_A_ &pipe_w);
2206 ev_unref (EV_A); /* watcher should not keep loop alive */
2207 }
2208}
2209
2210inline_speed void
2211evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2212{
2213 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2214
2215 if (expect_true (*flag))
2216 return;
2217
2218 *flag = 1;
2219 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2220
2221 pipe_write_skipped = 1;
2222
2223 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2224
2225 if (pipe_write_wanted)
2226 {
2227 int old_errno;
2228
2229 pipe_write_skipped = 0;
2230 ECB_MEMORY_FENCE_RELEASE;
2231
2232 old_errno = errno; /* save errno because write will clobber it */
2233
2234#if EV_USE_EVENTFD
2235 if (evpipe [0] < 0)
2236 {
2237 uint64_t counter = 1;
2238 write (evpipe [1], &counter, sizeof (uint64_t));
2239 }
2240 else
2241#endif
2242 {
2243#ifdef _WIN32
2244 WSABUF buf;
2245 DWORD sent;
2246 buf.buf = &buf;
2247 buf.len = 1;
2248 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2249#else
2250 write (evpipe [1], &(evpipe [1]), 1);
2251#endif
2252 }
2253
2254 errno = old_errno;
2255 }
2256}
2257
2258/* called whenever the libev signal pipe */
2259/* got some events (signal, async) */
465static void 2260static void
466upheap (WT *heap, int k) 2261pipecb (EV_P_ ev_io *iow, int revents)
467{ 2262{
468 WT w = heap [k]; 2263 int i;
469 2264
470 while (k && heap [k >> 1]->at > w->at) 2265 if (revents & EV_READ)
471 {
472 heap [k] = heap [k >> 1];
473 ((W)heap [k])->active = k + 1;
474 k >>= 1;
475 } 2266 {
2267#if EV_USE_EVENTFD
2268 if (evpipe [0] < 0)
2269 {
2270 uint64_t counter;
2271 read (evpipe [1], &counter, sizeof (uint64_t));
2272 }
2273 else
2274#endif
2275 {
2276 char dummy[4];
2277#ifdef _WIN32
2278 WSABUF buf;
2279 DWORD recvd;
2280 DWORD flags = 0;
2281 buf.buf = dummy;
2282 buf.len = sizeof (dummy);
2283 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2284#else
2285 read (evpipe [0], &dummy, sizeof (dummy));
2286#endif
2287 }
2288 }
476 2289
477 heap [k] = w; 2290 pipe_write_skipped = 0;
478 ((W)heap [k])->active = k + 1;
479 2291
2292 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2293
2294#if EV_SIGNAL_ENABLE
2295 if (sig_pending)
2296 {
2297 sig_pending = 0;
2298
2299 ECB_MEMORY_FENCE;
2300
2301 for (i = EV_NSIG - 1; i--; )
2302 if (expect_false (signals [i].pending))
2303 ev_feed_signal_event (EV_A_ i + 1);
2304 }
2305#endif
2306
2307#if EV_ASYNC_ENABLE
2308 if (async_pending)
2309 {
2310 async_pending = 0;
2311
2312 ECB_MEMORY_FENCE;
2313
2314 for (i = asynccnt; i--; )
2315 if (asyncs [i]->sent)
2316 {
2317 asyncs [i]->sent = 0;
2318 ECB_MEMORY_FENCE_RELEASE;
2319 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
2320 }
2321 }
2322#endif
2323}
2324
2325/*****************************************************************************/
2326
2327void
2328ev_feed_signal (int signum) EV_THROW
2329{
2330#if EV_MULTIPLICITY
2331 EV_P;
2332 ECB_MEMORY_FENCE_ACQUIRE;
2333 EV_A = signals [signum - 1].loop;
2334
2335 if (!EV_A)
2336 return;
2337#endif
2338
2339 signals [signum - 1].pending = 1;
2340 evpipe_write (EV_A_ &sig_pending);
480} 2341}
481 2342
482static void 2343static void
483downheap (WT *heap, int N, int k) 2344ev_sighandler (int signum)
484{ 2345{
485 WT w = heap [k]; 2346#ifdef _WIN32
2347 signal (signum, ev_sighandler);
2348#endif
486 2349
487 while (k < (N >> 1)) 2350 ev_feed_signal (signum);
488 { 2351}
489 int j = k << 1;
490 2352
491 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 2353void noinline
492 ++j; 2354ev_feed_signal_event (EV_P_ int signum) EV_THROW
2355{
2356 WL w;
493 2357
494 if (w->at <= heap [j]->at) 2358 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2359 return;
2360
2361 --signum;
2362
2363#if EV_MULTIPLICITY
2364 /* it is permissible to try to feed a signal to the wrong loop */
2365 /* or, likely more useful, feeding a signal nobody is waiting for */
2366
2367 if (expect_false (signals [signum].loop != EV_A))
2368 return;
2369#endif
2370
2371 signals [signum].pending = 0;
2372 ECB_MEMORY_FENCE_RELEASE;
2373
2374 for (w = signals [signum].head; w; w = w->next)
2375 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2376}
2377
2378#if EV_USE_SIGNALFD
2379static void
2380sigfdcb (EV_P_ ev_io *iow, int revents)
2381{
2382 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2383
2384 for (;;)
2385 {
2386 ssize_t res = read (sigfd, si, sizeof (si));
2387
2388 /* not ISO-C, as res might be -1, but works with SuS */
2389 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2390 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2391
2392 if (res < (ssize_t)sizeof (si))
495 break; 2393 break;
496
497 heap [k] = heap [j];
498 ((W)heap [k])->active = k + 1;
499 k = j;
500 } 2394 }
501
502 heap [k] = w;
503 ((W)heap [k])->active = k + 1;
504} 2395}
2396#endif
2397
2398#endif
505 2399
506/*****************************************************************************/ 2400/*****************************************************************************/
507 2401
508typedef struct 2402#if EV_CHILD_ENABLE
509{ 2403static WL childs [EV_PID_HASHSIZE];
510 WL head;
511 sig_atomic_t volatile gotsig;
512} ANSIG;
513 2404
514static ANSIG *signals;
515static int signalmax;
516
517static int sigpipe [2];
518static sig_atomic_t volatile gotsig;
519static struct ev_io sigev;
520
521static void
522signals_init (ANSIG *base, int count)
523{
524 while (count--)
525 {
526 base->head = 0;
527 base->gotsig = 0;
528
529 ++base;
530 }
531}
532
533static void
534sighandler (int signum)
535{
536#if WIN32
537 signal (signum, sighandler);
538#endif
539
540 signals [signum - 1].gotsig = 1;
541
542 if (!gotsig)
543 {
544 int old_errno = errno;
545 gotsig = 1;
546#ifdef WIN32
547 send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
548#else
549 write (sigpipe [1], &signum, 1);
550#endif
551 errno = old_errno;
552 }
553}
554
555static void
556sigcb (EV_P_ struct ev_io *iow, int revents)
557{
558 WL w;
559 int signum;
560
561#ifdef WIN32
562 recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
563#else
564 read (sigpipe [0], &revents, 1);
565#endif
566 gotsig = 0;
567
568 for (signum = signalmax; signum--; )
569 if (signals [signum].gotsig)
570 {
571 signals [signum].gotsig = 0;
572
573 for (w = signals [signum].head; w; w = w->next)
574 event (EV_A_ (W)w, EV_SIGNAL);
575 }
576}
577
578static void
579siginit (EV_P)
580{
581#ifndef WIN32
582 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
583 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
584
585 /* rather than sort out wether we really need nb, set it */
586 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
587 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
588#endif
589
590 ev_io_set (&sigev, sigpipe [0], EV_READ);
591 ev_io_start (EV_A_ &sigev);
592 ev_unref (EV_A); /* child watcher should not keep loop alive */
593}
594
595/*****************************************************************************/
596
597static struct ev_child *childs [PID_HASHSIZE];
598
599#ifndef WIN32
600
601static struct ev_signal childev; 2405static ev_signal childev;
2406
2407#ifndef WIFCONTINUED
2408# define WIFCONTINUED(status) 0
2409#endif
2410
2411/* handle a single child status event */
2412inline_speed void
2413child_reap (EV_P_ int chain, int pid, int status)
2414{
2415 ev_child *w;
2416 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
2417
2418 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2419 {
2420 if ((w->pid == pid || !w->pid)
2421 && (!traced || (w->flags & 1)))
2422 {
2423 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
2424 w->rpid = pid;
2425 w->rstatus = status;
2426 ev_feed_event (EV_A_ (W)w, EV_CHILD);
2427 }
2428 }
2429}
602 2430
603#ifndef WCONTINUED 2431#ifndef WCONTINUED
604# define WCONTINUED 0 2432# define WCONTINUED 0
605#endif 2433#endif
606 2434
2435/* called on sigchld etc., calls waitpid */
607static void 2436static void
608child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
609{
610 struct ev_child *w;
611
612 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
613 if (w->pid == pid || !w->pid)
614 {
615 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
616 w->rpid = pid;
617 w->rstatus = status;
618 event (EV_A_ (W)w, EV_CHILD);
619 }
620}
621
622static void
623childcb (EV_P_ struct ev_signal *sw, int revents) 2437childcb (EV_P_ ev_signal *sw, int revents)
624{ 2438{
625 int pid, status; 2439 int pid, status;
626 2440
2441 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
627 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 2442 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
628 { 2443 if (!WCONTINUED
2444 || errno != EINVAL
2445 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
2446 return;
2447
629 /* make sure we are called again until all childs have been reaped */ 2448 /* make sure we are called again until all children have been reaped */
2449 /* we need to do it this way so that the callback gets called before we continue */
630 event (EV_A_ (W)sw, EV_SIGNAL); 2450 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
631 2451
632 child_reap (EV_A_ sw, pid, pid, status); 2452 child_reap (EV_A_ pid, pid, status);
2453 if ((EV_PID_HASHSIZE) > 1)
633 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 2454 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
634 }
635} 2455}
636 2456
637#endif 2457#endif
638 2458
639/*****************************************************************************/ 2459/*****************************************************************************/
640 2460
2461#if EV_USE_IOCP
2462# include "ev_iocp.c"
2463#endif
2464#if EV_USE_PORT
2465# include "ev_port.c"
2466#endif
641#if EV_USE_KQUEUE 2467#if EV_USE_KQUEUE
642# include "ev_kqueue.c" 2468# include "ev_kqueue.c"
643#endif 2469#endif
644#if EV_USE_EPOLL 2470#if EV_USE_EPOLL
645# include "ev_epoll.c" 2471# include "ev_epoll.c"
… …
649#endif 2475#endif
650#if EV_USE_SELECT 2476#if EV_USE_SELECT
651# include "ev_select.c" 2477# include "ev_select.c"
652#endif 2478#endif
653 2479
654int 2480int ecb_cold
655ev_version_major (void) 2481ev_version_major (void) EV_THROW
656{ 2482{
657 return EV_VERSION_MAJOR; 2483 return EV_VERSION_MAJOR;
658} 2484}
659 2485
660int 2486int ecb_cold
661ev_version_minor (void) 2487ev_version_minor (void) EV_THROW
662{ 2488{
663 return EV_VERSION_MINOR; 2489 return EV_VERSION_MINOR;
664} 2490}
665 2491
666/* return true if we are running with elevated privileges and should ignore env variables */ 2492/* return true if we are running with elevated privileges and should ignore env variables */
667static int 2493int inline_size ecb_cold
668enable_secure (void) 2494enable_secure (void)
669{ 2495{
670#ifdef WIN32 2496#ifdef _WIN32
671 return 0; 2497 return 0;
672#else 2498#else
673 return getuid () != geteuid () 2499 return getuid () != geteuid ()
674 || getgid () != getegid (); 2500 || getgid () != getegid ();
675#endif 2501#endif
676} 2502}
677 2503
2504unsigned int ecb_cold
2505ev_supported_backends (void) EV_THROW
2506{
2507 unsigned int flags = 0;
2508
2509 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2510 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
2511 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2512 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2513 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2514
2515 return flags;
2516}
2517
2518unsigned int ecb_cold
2519ev_recommended_backends (void) EV_THROW
2520{
2521 unsigned int flags = ev_supported_backends ();
2522
2523#ifndef __NetBSD__
2524 /* kqueue is borked on everything but netbsd apparently */
2525 /* it usually doesn't work correctly on anything but sockets and pipes */
2526 flags &= ~EVBACKEND_KQUEUE;
2527#endif
2528#ifdef __APPLE__
2529 /* only select works correctly on that "unix-certified" platform */
2530 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2531 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2532#endif
2533#ifdef __FreeBSD__
2534 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2535#endif
2536
2537 return flags;
2538}
2539
2540unsigned int ecb_cold
2541ev_embeddable_backends (void) EV_THROW
2542{
2543 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2544
2545 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2546 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2547 flags &= ~EVBACKEND_EPOLL;
2548
2549 return flags;
2550}
2551
2552unsigned int
2553ev_backend (EV_P) EV_THROW
2554{
2555 return backend;
2556}
2557
2558#if EV_FEATURE_API
2559unsigned int
2560ev_iteration (EV_P) EV_THROW
2561{
2562 return loop_count;
2563}
2564
2565unsigned int
2566ev_depth (EV_P) EV_THROW
2567{
2568 return loop_depth;
2569}
2570
2571void
2572ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2573{
2574 io_blocktime = interval;
2575}
2576
2577void
2578ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2579{
2580 timeout_blocktime = interval;
2581}
2582
2583void
2584ev_set_userdata (EV_P_ void *data) EV_THROW
2585{
2586 userdata = data;
2587}
2588
2589void *
2590ev_userdata (EV_P) EV_THROW
2591{
2592 return userdata;
2593}
2594
2595void
2596ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
2597{
2598 invoke_cb = invoke_pending_cb;
2599}
2600
2601void
2602ev_set_loop_release_cb (EV_P_ ev_loop_callback_nothrow release, ev_loop_callback_nothrow acquire) EV_THROW
2603{
2604 release_cb = release;
2605 acquire_cb = acquire;
2606}
2607#endif
2608
2609/* initialise a loop structure, must be zero-initialised */
2610static void noinline ecb_cold
2611loop_init (EV_P_ unsigned int flags) EV_THROW
2612{
2613 if (!backend)
2614 {
2615 origflags = flags;
2616
2617#if EV_USE_REALTIME
2618 if (!have_realtime)
2619 {
2620 struct timespec ts;
2621
2622 if (!clock_gettime (CLOCK_REALTIME, &ts))
2623 have_realtime = 1;
2624 }
2625#endif
2626
2627#if EV_USE_MONOTONIC
2628 if (!have_monotonic)
2629 {
2630 struct timespec ts;
2631
2632 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
2633 have_monotonic = 1;
2634 }
2635#endif
2636
2637 /* pid check not overridable via env */
2638#ifndef _WIN32
2639 if (flags & EVFLAG_FORKCHECK)
2640 curpid = getpid ();
2641#endif
2642
2643 if (!(flags & EVFLAG_NOENV)
2644 && !enable_secure ()
2645 && getenv ("LIBEV_FLAGS"))
2646 flags = atoi (getenv ("LIBEV_FLAGS"));
2647
2648 ev_rt_now = ev_time ();
2649 mn_now = get_clock ();
2650 now_floor = mn_now;
2651 rtmn_diff = ev_rt_now - mn_now;
2652#if EV_FEATURE_API
2653 invoke_cb = ev_invoke_pending;
2654#endif
2655
2656 io_blocktime = 0.;
2657 timeout_blocktime = 0.;
2658 backend = 0;
2659 backend_fd = -1;
2660 sig_pending = 0;
2661#if EV_ASYNC_ENABLE
2662 async_pending = 0;
2663#endif
2664 pipe_write_skipped = 0;
2665 pipe_write_wanted = 0;
2666 evpipe [0] = -1;
2667 evpipe [1] = -1;
2668#if EV_USE_INOTIFY
2669 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2670#endif
2671#if EV_USE_SIGNALFD
2672 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2673#endif
2674
2675 if (!(flags & EVBACKEND_MASK))
2676 flags |= ev_recommended_backends ();
2677
2678#if EV_USE_IOCP
2679 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2680#endif
2681#if EV_USE_PORT
2682 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
2683#endif
2684#if EV_USE_KQUEUE
2685 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
2686#endif
2687#if EV_USE_EPOLL
2688 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
2689#endif
2690#if EV_USE_POLL
2691 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
2692#endif
2693#if EV_USE_SELECT
2694 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
2695#endif
2696
2697 ev_prepare_init (&pending_w, pendingcb);
2698
2699#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2700 ev_init (&pipe_w, pipecb);
2701 ev_set_priority (&pipe_w, EV_MAXPRI);
2702#endif
2703 }
2704}
2705
2706/* free up a loop structure */
2707void ecb_cold
2708ev_loop_destroy (EV_P)
2709{
2710 int i;
2711
2712#if EV_MULTIPLICITY
2713 /* mimic free (0) */
2714 if (!EV_A)
2715 return;
2716#endif
2717
2718#if EV_CLEANUP_ENABLE
2719 /* queue cleanup watchers (and execute them) */
2720 if (expect_false (cleanupcnt))
2721 {
2722 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2723 EV_INVOKE_PENDING;
2724 }
2725#endif
2726
2727#if EV_CHILD_ENABLE
2728 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2729 {
2730 ev_ref (EV_A); /* child watcher */
2731 ev_signal_stop (EV_A_ &childev);
2732 }
2733#endif
2734
2735 if (ev_is_active (&pipe_w))
2736 {
2737 /*ev_ref (EV_A);*/
2738 /*ev_io_stop (EV_A_ &pipe_w);*/
2739
2740 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2741 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2742 }
2743
2744#if EV_USE_SIGNALFD
2745 if (ev_is_active (&sigfd_w))
2746 close (sigfd);
2747#endif
2748
2749#if EV_USE_INOTIFY
2750 if (fs_fd >= 0)
2751 close (fs_fd);
2752#endif
2753
2754 if (backend_fd >= 0)
2755 close (backend_fd);
2756
2757#if EV_USE_IOCP
2758 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2759#endif
2760#if EV_USE_PORT
2761 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
2762#endif
2763#if EV_USE_KQUEUE
2764 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
2765#endif
2766#if EV_USE_EPOLL
2767 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
2768#endif
2769#if EV_USE_POLL
2770 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
2771#endif
2772#if EV_USE_SELECT
2773 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
2774#endif
2775
2776 for (i = NUMPRI; i--; )
2777 {
2778 array_free (pending, [i]);
2779#if EV_IDLE_ENABLE
2780 array_free (idle, [i]);
2781#endif
2782 }
2783
2784 ev_free (anfds); anfds = 0; anfdmax = 0;
2785
2786 /* have to use the microsoft-never-gets-it-right macro */
2787 array_free (rfeed, EMPTY);
2788 array_free (fdchange, EMPTY);
2789 array_free (timer, EMPTY);
2790#if EV_PERIODIC_ENABLE
2791 array_free (periodic, EMPTY);
2792#endif
2793#if EV_FORK_ENABLE
2794 array_free (fork, EMPTY);
2795#endif
2796#if EV_CLEANUP_ENABLE
2797 array_free (cleanup, EMPTY);
2798#endif
2799 array_free (prepare, EMPTY);
2800 array_free (check, EMPTY);
2801#if EV_ASYNC_ENABLE
2802 array_free (async, EMPTY);
2803#endif
2804
2805 backend = 0;
2806
2807#if EV_MULTIPLICITY
2808 if (ev_is_default_loop (EV_A))
2809#endif
2810 ev_default_loop_ptr = 0;
2811#if EV_MULTIPLICITY
2812 else
2813 ev_free (EV_A);
2814#endif
2815}
2816
2817#if EV_USE_INOTIFY
2818inline_size void infy_fork (EV_P);
2819#endif
2820
2821inline_size void
2822loop_fork (EV_P)
2823{
2824#if EV_USE_PORT
2825 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2826#endif
2827#if EV_USE_KQUEUE
2828 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
2829#endif
2830#if EV_USE_EPOLL
2831 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
2832#endif
2833#if EV_USE_INOTIFY
2834 infy_fork (EV_A);
2835#endif
2836
2837#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2838 if (ev_is_active (&pipe_w))
2839 {
2840 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2841
2842 ev_ref (EV_A);
2843 ev_io_stop (EV_A_ &pipe_w);
2844
2845 if (evpipe [0] >= 0)
2846 EV_WIN32_CLOSE_FD (evpipe [0]);
2847
2848 evpipe_init (EV_A);
2849 /* iterate over everything, in case we missed something before */
2850 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2851 }
2852#endif
2853
2854 postfork = 0;
2855}
2856
2857#if EV_MULTIPLICITY
2858
2859struct ev_loop * ecb_cold
2860ev_loop_new (unsigned int flags) EV_THROW
2861{
2862 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2863
2864 memset (EV_A, 0, sizeof (struct ev_loop));
2865 loop_init (EV_A_ flags);
2866
2867 if (ev_backend (EV_A))
2868 return EV_A;
2869
2870 ev_free (EV_A);
2871 return 0;
2872}
2873
2874#endif /* multiplicity */
2875
2876#if EV_VERIFY
2877static void noinline ecb_cold
2878verify_watcher (EV_P_ W w)
2879{
2880 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2881
2882 if (w->pending)
2883 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2884}
2885
2886static void noinline ecb_cold
2887verify_heap (EV_P_ ANHE *heap, int N)
2888{
2889 int i;
2890
2891 for (i = HEAP0; i < N + HEAP0; ++i)
2892 {
2893 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2894 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2895 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2896
2897 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2898 }
2899}
2900
2901static void noinline ecb_cold
2902array_verify (EV_P_ W *ws, int cnt)
2903{
2904 while (cnt--)
2905 {
2906 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2907 verify_watcher (EV_A_ ws [cnt]);
2908 }
2909}
2910#endif
2911
2912#if EV_FEATURE_API
2913void ecb_cold
2914ev_verify (EV_P) EV_THROW
2915{
2916#if EV_VERIFY
2917 int i;
2918 WL w, w2;
2919
2920 assert (activecnt >= -1);
2921
2922 assert (fdchangemax >= fdchangecnt);
2923 for (i = 0; i < fdchangecnt; ++i)
2924 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2925
2926 assert (anfdmax >= 0);
2927 for (i = 0; i < anfdmax; ++i)
2928 {
2929 int j = 0;
2930
2931 for (w = w2 = anfds [i].head; w; w = w->next)
2932 {
2933 verify_watcher (EV_A_ (W)w);
2934
2935 if (j++ & 1)
2936 {
2937 assert (("libev: io watcher list contains a loop", w != w2));
2938 w2 = w2->next;
2939 }
2940
2941 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2942 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2943 }
2944 }
2945
2946 assert (timermax >= timercnt);
2947 verify_heap (EV_A_ timers, timercnt);
2948
2949#if EV_PERIODIC_ENABLE
2950 assert (periodicmax >= periodiccnt);
2951 verify_heap (EV_A_ periodics, periodiccnt);
2952#endif
2953
2954 for (i = NUMPRI; i--; )
2955 {
2956 assert (pendingmax [i] >= pendingcnt [i]);
2957#if EV_IDLE_ENABLE
2958 assert (idleall >= 0);
2959 assert (idlemax [i] >= idlecnt [i]);
2960 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2961#endif
2962 }
2963
2964#if EV_FORK_ENABLE
2965 assert (forkmax >= forkcnt);
2966 array_verify (EV_A_ (W *)forks, forkcnt);
2967#endif
2968
2969#if EV_CLEANUP_ENABLE
2970 assert (cleanupmax >= cleanupcnt);
2971 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2972#endif
2973
2974#if EV_ASYNC_ENABLE
2975 assert (asyncmax >= asynccnt);
2976 array_verify (EV_A_ (W *)asyncs, asynccnt);
2977#endif
2978
2979#if EV_PREPARE_ENABLE
2980 assert (preparemax >= preparecnt);
2981 array_verify (EV_A_ (W *)prepares, preparecnt);
2982#endif
2983
2984#if EV_CHECK_ENABLE
2985 assert (checkmax >= checkcnt);
2986 array_verify (EV_A_ (W *)checks, checkcnt);
2987#endif
2988
2989# if 0
2990#if EV_CHILD_ENABLE
2991 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2992 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2993#endif
2994# endif
2995#endif
2996}
2997#endif
2998
2999#if EV_MULTIPLICITY
3000struct ev_loop * ecb_cold
3001#else
678int 3002int
679ev_method (EV_P) 3003#endif
3004ev_default_loop (unsigned int flags) EV_THROW
680{ 3005{
681 return method; 3006 if (!ev_default_loop_ptr)
682}
683
684static void
685loop_init (EV_P_ int methods)
686{
687 if (!method)
688 {
689#if EV_USE_MONOTONIC
690 { 3007 {
691 struct timespec ts;
692 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
693 have_monotonic = 1;
694 }
695#endif
696
697 rt_now = ev_time ();
698 mn_now = get_clock ();
699 now_floor = mn_now;
700 rtmn_diff = rt_now - mn_now;
701
702 if (methods == EVMETHOD_AUTO)
703 if (!enable_secure () && getenv ("LIBEV_METHODS"))
704 methods = atoi (getenv ("LIBEV_METHODS"));
705 else
706 methods = EVMETHOD_ANY;
707
708 method = 0;
709#if EV_USE_WIN32
710 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
711#endif
712#if EV_USE_KQUEUE
713 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
714#endif
715#if EV_USE_EPOLL
716 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
717#endif
718#if EV_USE_POLL
719 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
720#endif
721#if EV_USE_SELECT
722 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
723#endif
724
725 ev_watcher_init (&sigev, sigcb);
726 ev_set_priority (&sigev, EV_MAXPRI);
727 }
728}
729
730void
731loop_destroy (EV_P)
732{
733 int i;
734
735#if EV_USE_WIN32
736 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
737#endif
738#if EV_USE_KQUEUE
739 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
740#endif
741#if EV_USE_EPOLL
742 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
743#endif
744#if EV_USE_POLL
745 if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
746#endif
747#if EV_USE_SELECT
748 if (method == EVMETHOD_SELECT) select_destroy (EV_A);
749#endif
750
751 for (i = NUMPRI; i--; )
752 array_free (pending, [i]);
753
754 /* have to use the microsoft-never-gets-it-right macro */
755 array_free_microshit (fdchange);
756 array_free_microshit (timer);
757 array_free_microshit (periodic);
758 array_free_microshit (idle);
759 array_free_microshit (prepare);
760 array_free_microshit (check);
761
762 method = 0;
763}
764
765static void
766loop_fork (EV_P)
767{
768#if EV_USE_EPOLL
769 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
770#endif
771#if EV_USE_KQUEUE
772 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
773#endif
774
775 if (ev_is_active (&sigev))
776 {
777 /* default loop */
778
779 ev_ref (EV_A);
780 ev_io_stop (EV_A_ &sigev);
781 close (sigpipe [0]);
782 close (sigpipe [1]);
783
784 while (pipe (sigpipe))
785 syserr ("(libev) error creating pipe");
786
787 siginit (EV_A);
788 }
789
790 postfork = 0;
791}
792
793#if EV_MULTIPLICITY 3008#if EV_MULTIPLICITY
794struct ev_loop * 3009 EV_P = ev_default_loop_ptr = &default_loop_struct;
795ev_loop_new (int methods)
796{
797 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
798
799 memset (loop, 0, sizeof (struct ev_loop));
800
801 loop_init (EV_A_ methods);
802
803 if (ev_method (EV_A))
804 return loop;
805
806 return 0;
807}
808
809void
810ev_loop_destroy (EV_P)
811{
812 loop_destroy (EV_A);
813 ev_free (loop);
814}
815
816void
817ev_loop_fork (EV_P)
818{
819 postfork = 1;
820}
821
822#endif
823
824#if EV_MULTIPLICITY
825struct ev_loop default_loop_struct;
826static struct ev_loop *default_loop;
827
828struct ev_loop *
829#else 3010#else
830static int default_loop;
831
832int
833#endif
834ev_default_loop (int methods)
835{
836 if (sigpipe [0] == sigpipe [1])
837 if (pipe (sigpipe))
838 return 0;
839
840 if (!default_loop)
841 {
842#if EV_MULTIPLICITY
843 struct ev_loop *loop = default_loop = &default_loop_struct;
844#else
845 default_loop = 1; 3011 ev_default_loop_ptr = 1;
846#endif 3012#endif
847 3013
848 loop_init (EV_A_ methods); 3014 loop_init (EV_A_ flags);
849 3015
850 if (ev_method (EV_A)) 3016 if (ev_backend (EV_A))
851 { 3017 {
852 siginit (EV_A); 3018#if EV_CHILD_ENABLE
853
854#ifndef WIN32
855 ev_signal_init (&childev, childcb, SIGCHLD); 3019 ev_signal_init (&childev, childcb, SIGCHLD);
856 ev_set_priority (&childev, EV_MAXPRI); 3020 ev_set_priority (&childev, EV_MAXPRI);
857 ev_signal_start (EV_A_ &childev); 3021 ev_signal_start (EV_A_ &childev);
858 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3022 ev_unref (EV_A); /* child watcher should not keep loop alive */
859#endif 3023#endif
860 } 3024 }
861 else 3025 else
862 default_loop = 0; 3026 ev_default_loop_ptr = 0;
863 } 3027 }
864 3028
865 return default_loop; 3029 return ev_default_loop_ptr;
866} 3030}
867 3031
868void 3032void
869ev_default_destroy (void) 3033ev_loop_fork (EV_P) EV_THROW
870{ 3034{
871#if EV_MULTIPLICITY 3035 postfork = 1;
872 struct ev_loop *loop = default_loop;
873#endif
874
875#ifndef WIN32
876 ev_ref (EV_A); /* child watcher */
877 ev_signal_stop (EV_A_ &childev);
878#endif
879
880 ev_ref (EV_A); /* signal watcher */
881 ev_io_stop (EV_A_ &sigev);
882
883 close (sigpipe [0]); sigpipe [0] = 0;
884 close (sigpipe [1]); sigpipe [1] = 0;
885
886 loop_destroy (EV_A);
887} 3036}
3037
3038/*****************************************************************************/
888 3039
889void 3040void
890ev_default_fork (void) 3041ev_invoke (EV_P_ void *w, int revents)
891{ 3042{
892#if EV_MULTIPLICITY 3043 EV_CB_INVOKE ((W)w, revents);
893 struct ev_loop *loop = default_loop;
894#endif
895
896 if (method)
897 postfork = 1;
898} 3044}
899 3045
900/*****************************************************************************/ 3046unsigned int
901 3047ev_pending_count (EV_P) EV_THROW
902static int
903any_pending (EV_P)
904{ 3048{
905 int pri; 3049 int pri;
3050 unsigned int count = 0;
906 3051
907 for (pri = NUMPRI; pri--; ) 3052 for (pri = NUMPRI; pri--; )
908 if (pendingcnt [pri]) 3053 count += pendingcnt [pri];
909 return 1;
910 3054
911 return 0; 3055 return count;
912} 3056}
913 3057
914static void 3058void noinline
915call_pending (EV_P) 3059ev_invoke_pending (EV_P)
916{ 3060{
917 int pri; 3061 pendingpri = NUMPRI;
918 3062
919 for (pri = NUMPRI; pri--; ) 3063 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3064 {
3065 --pendingpri;
3066
920 while (pendingcnt [pri]) 3067 while (pendingcnt [pendingpri])
921 {
922 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
923
924 if (p->w)
925 {
926 p->w->pending = 0;
927 p->w->cb (EV_A_ p->w, p->events);
928 }
929 }
930}
931
932static void
933timers_reify (EV_P)
934{
935 while (timercnt && ((WT)timers [0])->at <= mn_now)
936 {
937 struct ev_timer *w = timers [0];
938
939 assert (("inactive timer on timer heap detected", ev_is_active (w)));
940
941 /* first reschedule or stop timer */
942 if (w->repeat)
943 { 3068 {
944 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3069 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
945 ((WT)w)->at = mn_now + w->repeat; 3070
946 downheap ((WT *)timers, timercnt, 0); 3071 p->w->pending = 0;
3072 EV_CB_INVOKE (p->w, p->events);
3073 EV_FREQUENT_CHECK;
947 } 3074 }
948 else
949 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
950
951 event (EV_A_ (W)w, EV_TIMEOUT);
952 }
953}
954
955static void
956periodics_reify (EV_P)
957{
958 while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
959 { 3075 }
960 struct ev_periodic *w = periodics [0]; 3076}
961 3077
962 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 3078#if EV_IDLE_ENABLE
3079/* make idle watchers pending. this handles the "call-idle */
3080/* only when higher priorities are idle" logic */
3081inline_size void
3082idle_reify (EV_P)
3083{
3084 if (expect_false (idleall))
3085 {
3086 int pri;
963 3087
964 /* first reschedule or stop timer */ 3088 for (pri = NUMPRI; pri--; )
965 if (w->interval)
966 { 3089 {
967 ((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval; 3090 if (pendingcnt [pri])
968 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now)); 3091 break;
969 downheap ((WT *)periodics, periodiccnt, 0);
970 }
971 else
972 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
973 3092
974 event (EV_A_ (W)w, EV_PERIODIC); 3093 if (idlecnt [pri])
975 }
976}
977
978static void
979periodics_reschedule (EV_P)
980{
981 int i;
982
983 /* adjust periodics after time jump */
984 for (i = 0; i < periodiccnt; ++i)
985 {
986 struct ev_periodic *w = periodics [i];
987
988 if (w->interval)
989 {
990 ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
991
992 if (fabs (diff) >= 1e-4)
993 { 3094 {
994 ev_periodic_stop (EV_A_ w); 3095 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
995 ev_periodic_start (EV_A_ w); 3096 break;
996
997 i = 0; /* restart loop, inefficient, but time jumps should be rare */
998 } 3097 }
999 } 3098 }
1000 } 3099 }
1001} 3100}
3101#endif
1002 3102
1003inline int 3103/* make timers pending */
1004time_update_monotonic (EV_P) 3104inline_size void
3105timers_reify (EV_P)
1005{ 3106{
1006 mn_now = get_clock (); 3107 EV_FREQUENT_CHECK;
1007 3108
1008 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 3109 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1009 {
1010 rt_now = rtmn_diff + mn_now;
1011 return 0;
1012 } 3110 {
1013 else 3111 do
3112 {
3113 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
3114
3115 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
3116
3117 /* first reschedule or stop timer */
3118 if (w->repeat)
3119 {
3120 ev_at (w) += w->repeat;
3121 if (ev_at (w) < mn_now)
3122 ev_at (w) = mn_now;
3123
3124 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
3125
3126 ANHE_at_cache (timers [HEAP0]);
3127 downheap (timers, timercnt, HEAP0);
3128 }
3129 else
3130 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
3131
3132 EV_FREQUENT_CHECK;
3133 feed_reverse (EV_A_ (W)w);
3134 }
3135 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
3136
3137 feed_reverse_done (EV_A_ EV_TIMER);
1014 { 3138 }
1015 now_floor = mn_now; 3139}
1016 rt_now = ev_time (); 3140
1017 return 1; 3141#if EV_PERIODIC_ENABLE
3142
3143static void noinline
3144periodic_recalc (EV_P_ ev_periodic *w)
3145{
3146 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3147 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3148
3149 /* the above almost always errs on the low side */
3150 while (at <= ev_rt_now)
1018 } 3151 {
1019} 3152 ev_tstamp nat = at + w->interval;
1020 3153
1021static void 3154 /* when resolution fails us, we use ev_rt_now */
1022time_update (EV_P) 3155 if (expect_false (nat == at))
3156 {
3157 at = ev_rt_now;
3158 break;
3159 }
3160
3161 at = nat;
3162 }
3163
3164 ev_at (w) = at;
3165}
3166
3167/* make periodics pending */
3168inline_size void
3169periodics_reify (EV_P)
3170{
3171 EV_FREQUENT_CHECK;
3172
3173 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
3174 {
3175 do
3176 {
3177 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
3178
3179 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
3180
3181 /* first reschedule or stop timer */
3182 if (w->reschedule_cb)
3183 {
3184 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3185
3186 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
3187
3188 ANHE_at_cache (periodics [HEAP0]);
3189 downheap (periodics, periodiccnt, HEAP0);
3190 }
3191 else if (w->interval)
3192 {
3193 periodic_recalc (EV_A_ w);
3194 ANHE_at_cache (periodics [HEAP0]);
3195 downheap (periodics, periodiccnt, HEAP0);
3196 }
3197 else
3198 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
3199
3200 EV_FREQUENT_CHECK;
3201 feed_reverse (EV_A_ (W)w);
3202 }
3203 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
3204
3205 feed_reverse_done (EV_A_ EV_PERIODIC);
3206 }
3207}
3208
3209/* simply recalculate all periodics */
3210/* TODO: maybe ensure that at least one event happens when jumping forward? */
3211static void noinline ecb_cold
3212periodics_reschedule (EV_P)
1023{ 3213{
1024 int i; 3214 int i;
1025 3215
3216 /* adjust periodics after time jump */
3217 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
3218 {
3219 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
3220
3221 if (w->reschedule_cb)
3222 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3223 else if (w->interval)
3224 periodic_recalc (EV_A_ w);
3225
3226 ANHE_at_cache (periodics [i]);
3227 }
3228
3229 reheap (periodics, periodiccnt);
3230}
3231#endif
3232
3233/* adjust all timers by a given offset */
3234static void noinline ecb_cold
3235timers_reschedule (EV_P_ ev_tstamp adjust)
3236{
3237 int i;
3238
3239 for (i = 0; i < timercnt; ++i)
3240 {
3241 ANHE *he = timers + i + HEAP0;
3242 ANHE_w (*he)->at += adjust;
3243 ANHE_at_cache (*he);
3244 }
3245}
3246
3247/* fetch new monotonic and realtime times from the kernel */
3248/* also detect if there was a timejump, and act accordingly */
3249inline_speed void
3250time_update (EV_P_ ev_tstamp max_block)
3251{
1026#if EV_USE_MONOTONIC 3252#if EV_USE_MONOTONIC
1027 if (expect_true (have_monotonic)) 3253 if (expect_true (have_monotonic))
1028 { 3254 {
1029 if (time_update_monotonic (EV_A)) 3255 int i;
3256 ev_tstamp odiff = rtmn_diff;
3257
3258 mn_now = get_clock ();
3259
3260 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
3261 /* interpolate in the meantime */
3262 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1030 { 3263 {
1031 ev_tstamp odiff = rtmn_diff; 3264 ev_rt_now = rtmn_diff + mn_now;
3265 return;
3266 }
1032 3267
3268 now_floor = mn_now;
3269 ev_rt_now = ev_time ();
3270
1033 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 3271 /* loop a few times, before making important decisions.
3272 * on the choice of "4": one iteration isn't enough,
3273 * in case we get preempted during the calls to
3274 * ev_time and get_clock. a second call is almost guaranteed
3275 * to succeed in that case, though. and looping a few more times
3276 * doesn't hurt either as we only do this on time-jumps or
3277 * in the unlikely event of having been preempted here.
3278 */
3279 for (i = 4; --i; )
1034 { 3280 {
3281 ev_tstamp diff;
1035 rtmn_diff = rt_now - mn_now; 3282 rtmn_diff = ev_rt_now - mn_now;
1036 3283
1037 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 3284 diff = odiff - rtmn_diff;
3285
3286 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1038 return; /* all is well */ 3287 return; /* all is well */
1039 3288
1040 rt_now = ev_time (); 3289 ev_rt_now = ev_time ();
1041 mn_now = get_clock (); 3290 mn_now = get_clock ();
1042 now_floor = mn_now; 3291 now_floor = mn_now;
1043 } 3292 }
1044 3293
3294 /* no timer adjustment, as the monotonic clock doesn't jump */
3295 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
3296# if EV_PERIODIC_ENABLE
3297 periodics_reschedule (EV_A);
3298# endif
3299 }
3300 else
3301#endif
3302 {
3303 ev_rt_now = ev_time ();
3304
3305 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
3306 {
3307 /* adjust timers. this is easy, as the offset is the same for all of them */
3308 timers_reschedule (EV_A_ ev_rt_now - mn_now);
3309#if EV_PERIODIC_ENABLE
1045 periodics_reschedule (EV_A); 3310 periodics_reschedule (EV_A);
1046 /* no timer adjustment, as the monotonic clock doesn't jump */ 3311#endif
1047 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1048 } 3312 }
1049 }
1050 else
1051#endif
1052 {
1053 rt_now = ev_time ();
1054 3313
1055 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1056 {
1057 periodics_reschedule (EV_A);
1058
1059 /* adjust timers. this is easy, as the offset is the same for all */
1060 for (i = 0; i < timercnt; ++i)
1061 ((WT)timers [i])->at += rt_now - mn_now;
1062 }
1063
1064 mn_now = rt_now; 3314 mn_now = ev_rt_now;
1065 } 3315 }
1066} 3316}
1067 3317
1068void 3318int
1069ev_ref (EV_P)
1070{
1071 ++activecnt;
1072}
1073
1074void
1075ev_unref (EV_P)
1076{
1077 --activecnt;
1078}
1079
1080static int loop_done;
1081
1082void
1083ev_loop (EV_P_ int flags) 3319ev_run (EV_P_ int flags)
1084{ 3320{
1085 double block; 3321#if EV_FEATURE_API
1086 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 3322 ++loop_depth;
3323#endif
3324
3325 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3326
3327 loop_done = EVBREAK_CANCEL;
3328
3329 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1087 3330
1088 do 3331 do
1089 { 3332 {
3333#if EV_VERIFY >= 2
3334 ev_verify (EV_A);
3335#endif
3336
3337#ifndef _WIN32
3338 if (expect_false (curpid)) /* penalise the forking check even more */
3339 if (expect_false (getpid () != curpid))
3340 {
3341 curpid = getpid ();
3342 postfork = 1;
3343 }
3344#endif
3345
3346#if EV_FORK_ENABLE
3347 /* we might have forked, so queue fork handlers */
3348 if (expect_false (postfork))
3349 if (forkcnt)
3350 {
3351 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
3352 EV_INVOKE_PENDING;
3353 }
3354#endif
3355
3356#if EV_PREPARE_ENABLE
1090 /* queue check watchers (and execute them) */ 3357 /* queue prepare watchers (and execute them) */
1091 if (expect_false (preparecnt)) 3358 if (expect_false (preparecnt))
1092 { 3359 {
1093 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3360 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1094 call_pending (EV_A); 3361 EV_INVOKE_PENDING;
1095 } 3362 }
3363#endif
3364
3365 if (expect_false (loop_done))
3366 break;
1096 3367
1097 /* we might have forked, so reify kernel state if necessary */ 3368 /* we might have forked, so reify kernel state if necessary */
1098 if (expect_false (postfork)) 3369 if (expect_false (postfork))
1099 loop_fork (EV_A); 3370 loop_fork (EV_A);
1100 3371
1101 /* update fd-related kernel structures */ 3372 /* update fd-related kernel structures */
1102 fd_reify (EV_A); 3373 fd_reify (EV_A);
1103 3374
1104 /* calculate blocking time */ 3375 /* calculate blocking time */
3376 {
3377 ev_tstamp waittime = 0.;
3378 ev_tstamp sleeptime = 0.;
1105 3379
1106 /* we only need this for !monotonic clock or timers, but as we basically 3380 /* remember old timestamp for io_blocktime calculation */
1107 always have timers, we just calculate it always */ 3381 ev_tstamp prev_mn_now = mn_now;
1108#if EV_USE_MONOTONIC 3382
1109 if (expect_true (have_monotonic)) 3383 /* update time to cancel out callback processing overhead */
1110 time_update_monotonic (EV_A); 3384 time_update (EV_A_ 1e100);
1111 else 3385
1112#endif 3386 /* from now on, we want a pipe-wake-up */
3387 pipe_write_wanted = 1;
3388
3389 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3390
3391 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1113 { 3392 {
1114 rt_now = ev_time ();
1115 mn_now = rt_now;
1116 }
1117
1118 if (flags & EVLOOP_NONBLOCK || idlecnt)
1119 block = 0.;
1120 else
1121 {
1122 block = MAX_BLOCKTIME; 3393 waittime = MAX_BLOCKTIME;
1123 3394
1124 if (timercnt) 3395 if (timercnt)
1125 { 3396 {
1126 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 3397 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1127 if (block > to) block = to; 3398 if (waittime > to) waittime = to;
1128 } 3399 }
1129 3400
3401#if EV_PERIODIC_ENABLE
1130 if (periodiccnt) 3402 if (periodiccnt)
1131 { 3403 {
1132 ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge; 3404 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1133 if (block > to) block = to; 3405 if (waittime > to) waittime = to;
1134 } 3406 }
3407#endif
1135 3408
1136 if (block < 0.) block = 0.; 3409 /* don't let timeouts decrease the waittime below timeout_blocktime */
3410 if (expect_false (waittime < timeout_blocktime))
3411 waittime = timeout_blocktime;
3412
3413 /* at this point, we NEED to wait, so we have to ensure */
3414 /* to pass a minimum nonzero value to the backend */
3415 if (expect_false (waittime < backend_mintime))
3416 waittime = backend_mintime;
3417
3418 /* extra check because io_blocktime is commonly 0 */
3419 if (expect_false (io_blocktime))
3420 {
3421 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3422
3423 if (sleeptime > waittime - backend_mintime)
3424 sleeptime = waittime - backend_mintime;
3425
3426 if (expect_true (sleeptime > 0.))
3427 {
3428 ev_sleep (sleeptime);
3429 waittime -= sleeptime;
3430 }
3431 }
1137 } 3432 }
1138 3433
1139 method_poll (EV_A_ block); 3434#if EV_FEATURE_API
3435 ++loop_count;
3436#endif
3437 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
3438 backend_poll (EV_A_ waittime);
3439 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
1140 3440
3441 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3442
3443 ECB_MEMORY_FENCE_ACQUIRE;
3444 if (pipe_write_skipped)
3445 {
3446 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3447 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3448 }
3449
3450
1141 /* update rt_now, do magic */ 3451 /* update ev_rt_now, do magic */
1142 time_update (EV_A); 3452 time_update (EV_A_ waittime + sleeptime);
3453 }
1143 3454
1144 /* queue pending timers and reschedule them */ 3455 /* queue pending timers and reschedule them */
1145 timers_reify (EV_A); /* relative timers called last */ 3456 timers_reify (EV_A); /* relative timers called last */
3457#if EV_PERIODIC_ENABLE
1146 periodics_reify (EV_A); /* absolute timers called first */ 3458 periodics_reify (EV_A); /* absolute timers called first */
3459#endif
1147 3460
3461#if EV_IDLE_ENABLE
1148 /* queue idle watchers unless io or timers are pending */ 3462 /* queue idle watchers unless other events are pending */
1149 if (idlecnt && !any_pending (EV_A)) 3463 idle_reify (EV_A);
1150 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 3464#endif
1151 3465
3466#if EV_CHECK_ENABLE
1152 /* queue check watchers, to be executed first */ 3467 /* queue check watchers, to be executed first */
1153 if (checkcnt) 3468 if (expect_false (checkcnt))
1154 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3469 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3470#endif
1155 3471
1156 call_pending (EV_A); 3472 EV_INVOKE_PENDING;
1157 } 3473 }
1158 while (activecnt && !loop_done); 3474 while (expect_true (
3475 activecnt
3476 && !loop_done
3477 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3478 ));
1159 3479
1160 if (loop_done != 2) 3480 if (loop_done == EVBREAK_ONE)
1161 loop_done = 0; 3481 loop_done = EVBREAK_CANCEL;
3482
3483#if EV_FEATURE_API
3484 --loop_depth;
3485#endif
3486
3487 return activecnt;
1162} 3488}
1163 3489
1164void 3490void
1165ev_unloop (EV_P_ int how) 3491ev_break (EV_P_ int how) EV_THROW
1166{ 3492{
1167 loop_done = how; 3493 loop_done = how;
1168} 3494}
1169 3495
3496void
3497ev_ref (EV_P) EV_THROW
3498{
3499 ++activecnt;
3500}
3501
3502void
3503ev_unref (EV_P) EV_THROW
3504{
3505 --activecnt;
3506}
3507
3508void
3509ev_now_update (EV_P) EV_THROW
3510{
3511 time_update (EV_A_ 1e100);
3512}
3513
3514void
3515ev_suspend (EV_P) EV_THROW
3516{
3517 ev_now_update (EV_A);
3518}
3519
3520void
3521ev_resume (EV_P) EV_THROW
3522{
3523 ev_tstamp mn_prev = mn_now;
3524
3525 ev_now_update (EV_A);
3526 timers_reschedule (EV_A_ mn_now - mn_prev);
3527#if EV_PERIODIC_ENABLE
3528 /* TODO: really do this? */
3529 periodics_reschedule (EV_A);
3530#endif
3531}
3532
1170/*****************************************************************************/ 3533/*****************************************************************************/
3534/* singly-linked list management, used when the expected list length is short */
1171 3535
1172inline void 3536inline_size void
1173wlist_add (WL *head, WL elem) 3537wlist_add (WL *head, WL elem)
1174{ 3538{
1175 elem->next = *head; 3539 elem->next = *head;
1176 *head = elem; 3540 *head = elem;
1177} 3541}
1178 3542
1179inline void 3543inline_size void
1180wlist_del (WL *head, WL elem) 3544wlist_del (WL *head, WL elem)
1181{ 3545{
1182 while (*head) 3546 while (*head)
1183 { 3547 {
1184 if (*head == elem) 3548 if (expect_true (*head == elem))
1185 { 3549 {
1186 *head = elem->next; 3550 *head = elem->next;
1187 return; 3551 break;
1188 } 3552 }
1189 3553
1190 head = &(*head)->next; 3554 head = &(*head)->next;
1191 } 3555 }
1192} 3556}
1193 3557
3558/* internal, faster, version of ev_clear_pending */
1194inline void 3559inline_speed void
1195ev_clear_pending (EV_P_ W w) 3560clear_pending (EV_P_ W w)
1196{ 3561{
1197 if (w->pending) 3562 if (w->pending)
1198 { 3563 {
1199 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3564 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1200 w->pending = 0; 3565 w->pending = 0;
1201 } 3566 }
1202} 3567}
1203 3568
3569int
3570ev_clear_pending (EV_P_ void *w) EV_THROW
3571{
3572 W w_ = (W)w;
3573 int pending = w_->pending;
3574
3575 if (expect_true (pending))
3576 {
3577 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3578 p->w = (W)&pending_w;
3579 w_->pending = 0;
3580 return p->events;
3581 }
3582 else
3583 return 0;
3584}
3585
1204inline void 3586inline_size void
3587pri_adjust (EV_P_ W w)
3588{
3589 int pri = ev_priority (w);
3590 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3591 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3592 ev_set_priority (w, pri);
3593}
3594
3595inline_speed void
1205ev_start (EV_P_ W w, int active) 3596ev_start (EV_P_ W w, int active)
1206{ 3597{
1207 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 3598 pri_adjust (EV_A_ w);
1208 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1209
1210 w->active = active; 3599 w->active = active;
1211 ev_ref (EV_A); 3600 ev_ref (EV_A);
1212} 3601}
1213 3602
1214inline void 3603inline_size void
1215ev_stop (EV_P_ W w) 3604ev_stop (EV_P_ W w)
1216{ 3605{
1217 ev_unref (EV_A); 3606 ev_unref (EV_A);
1218 w->active = 0; 3607 w->active = 0;
1219} 3608}
1220 3609
1221/*****************************************************************************/ 3610/*****************************************************************************/
1222 3611
1223void 3612void noinline
1224ev_io_start (EV_P_ struct ev_io *w) 3613ev_io_start (EV_P_ ev_io *w) EV_THROW
1225{ 3614{
1226 int fd = w->fd; 3615 int fd = w->fd;
1227 3616
1228 if (ev_is_active (w)) 3617 if (expect_false (ev_is_active (w)))
1229 return; 3618 return;
1230 3619
1231 assert (("ev_io_start called with negative fd", fd >= 0)); 3620 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3621 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3622
3623 EV_FREQUENT_CHECK;
1232 3624
1233 ev_start (EV_A_ (W)w, 1); 3625 ev_start (EV_A_ (W)w, 1);
1234 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3626 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1235 wlist_add ((WL *)&anfds[fd].head, (WL)w); 3627 wlist_add (&anfds[fd].head, (WL)w);
1236 3628
1237 fd_change (EV_A_ fd); 3629 /* common bug, apparently */
1238} 3630 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
1239 3631
1240void 3632 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3633 w->events &= ~EV__IOFDSET;
3634
3635 EV_FREQUENT_CHECK;
3636}
3637
3638void noinline
1241ev_io_stop (EV_P_ struct ev_io *w) 3639ev_io_stop (EV_P_ ev_io *w) EV_THROW
1242{ 3640{
1243 ev_clear_pending (EV_A_ (W)w); 3641 clear_pending (EV_A_ (W)w);
1244 if (!ev_is_active (w)) 3642 if (expect_false (!ev_is_active (w)))
1245 return; 3643 return;
1246 3644
3645 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3646
3647 EV_FREQUENT_CHECK;
3648
1247 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 3649 wlist_del (&anfds[w->fd].head, (WL)w);
1248 ev_stop (EV_A_ (W)w); 3650 ev_stop (EV_A_ (W)w);
1249 3651
1250 fd_change (EV_A_ w->fd); 3652 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1251}
1252 3653
1253void 3654 EV_FREQUENT_CHECK;
3655}
3656
3657void noinline
1254ev_timer_start (EV_P_ struct ev_timer *w) 3658ev_timer_start (EV_P_ ev_timer *w) EV_THROW
1255{ 3659{
1256 if (ev_is_active (w)) 3660 if (expect_false (ev_is_active (w)))
1257 return; 3661 return;
1258 3662
1259 ((WT)w)->at += mn_now; 3663 ev_at (w) += mn_now;
1260 3664
1261 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3665 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1262 3666
3667 EV_FREQUENT_CHECK;
3668
3669 ++timercnt;
1263 ev_start (EV_A_ (W)w, ++timercnt); 3670 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1264 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void)); 3671 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1265 timers [timercnt - 1] = w; 3672 ANHE_w (timers [ev_active (w)]) = (WT)w;
1266 upheap ((WT *)timers, timercnt - 1); 3673 ANHE_at_cache (timers [ev_active (w)]);
3674 upheap (timers, ev_active (w));
1267 3675
3676 EV_FREQUENT_CHECK;
3677
1268 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 3678 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1269} 3679}
1270 3680
1271void 3681void noinline
1272ev_timer_stop (EV_P_ struct ev_timer *w) 3682ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
1273{ 3683{
1274 ev_clear_pending (EV_A_ (W)w); 3684 clear_pending (EV_A_ (W)w);
1275 if (!ev_is_active (w)) 3685 if (expect_false (!ev_is_active (w)))
1276 return; 3686 return;
1277 3687
3688 EV_FREQUENT_CHECK;
3689
3690 {
3691 int active = ev_active (w);
3692
1278 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 3693 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1279 3694
1280 if (((W)w)->active < timercnt--) 3695 --timercnt;
3696
3697 if (expect_true (active < timercnt + HEAP0))
1281 { 3698 {
1282 timers [((W)w)->active - 1] = timers [timercnt]; 3699 timers [active] = timers [timercnt + HEAP0];
1283 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 3700 adjustheap (timers, timercnt, active);
1284 } 3701 }
3702 }
1285 3703
1286 ((WT)w)->at = w->repeat; 3704 ev_at (w) -= mn_now;
1287 3705
1288 ev_stop (EV_A_ (W)w); 3706 ev_stop (EV_A_ (W)w);
1289}
1290 3707
1291void 3708 EV_FREQUENT_CHECK;
3709}
3710
3711void noinline
1292ev_timer_again (EV_P_ struct ev_timer *w) 3712ev_timer_again (EV_P_ ev_timer *w) EV_THROW
1293{ 3713{
3714 EV_FREQUENT_CHECK;
3715
3716 clear_pending (EV_A_ (W)w);
3717
1294 if (ev_is_active (w)) 3718 if (ev_is_active (w))
1295 { 3719 {
1296 if (w->repeat) 3720 if (w->repeat)
1297 { 3721 {
1298 ((WT)w)->at = mn_now + w->repeat; 3722 ev_at (w) = mn_now + w->repeat;
1299 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 3723 ANHE_at_cache (timers [ev_active (w)]);
3724 adjustheap (timers, timercnt, ev_active (w));
1300 } 3725 }
1301 else 3726 else
1302 ev_timer_stop (EV_A_ w); 3727 ev_timer_stop (EV_A_ w);
1303 } 3728 }
1304 else if (w->repeat) 3729 else if (w->repeat)
3730 {
3731 ev_at (w) = w->repeat;
1305 ev_timer_start (EV_A_ w); 3732 ev_timer_start (EV_A_ w);
1306} 3733 }
1307 3734
1308void 3735 EV_FREQUENT_CHECK;
3736}
3737
3738ev_tstamp
3739ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3740{
3741 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3742}
3743
3744#if EV_PERIODIC_ENABLE
3745void noinline
1309ev_periodic_start (EV_P_ struct ev_periodic *w) 3746ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
1310{ 3747{
1311 if (ev_is_active (w)) 3748 if (expect_false (ev_is_active (w)))
1312 return; 3749 return;
1313 3750
3751 if (w->reschedule_cb)
3752 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3753 else if (w->interval)
3754 {
1314 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3755 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
3756 periodic_recalc (EV_A_ w);
3757 }
3758 else
3759 ev_at (w) = w->offset;
1315 3760
1316 /* this formula differs from the one in periodic_reify because we do not always round up */ 3761 EV_FREQUENT_CHECK;
1317 if (w->interval)
1318 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
1319 3762
3763 ++periodiccnt;
1320 ev_start (EV_A_ (W)w, ++periodiccnt); 3764 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1321 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); 3765 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1322 periodics [periodiccnt - 1] = w; 3766 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1323 upheap ((WT *)periodics, periodiccnt - 1); 3767 ANHE_at_cache (periodics [ev_active (w)]);
3768 upheap (periodics, ev_active (w));
1324 3769
3770 EV_FREQUENT_CHECK;
3771
1325 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 3772 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1326} 3773}
1327 3774
1328void 3775void noinline
1329ev_periodic_stop (EV_P_ struct ev_periodic *w) 3776ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
1330{ 3777{
1331 ev_clear_pending (EV_A_ (W)w); 3778 clear_pending (EV_A_ (W)w);
1332 if (!ev_is_active (w)) 3779 if (expect_false (!ev_is_active (w)))
1333 return; 3780 return;
1334 3781
3782 EV_FREQUENT_CHECK;
3783
3784 {
3785 int active = ev_active (w);
3786
1335 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 3787 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1336 3788
1337 if (((W)w)->active < periodiccnt--) 3789 --periodiccnt;
3790
3791 if (expect_true (active < periodiccnt + HEAP0))
1338 { 3792 {
1339 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 3793 periodics [active] = periodics [periodiccnt + HEAP0];
1340 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 3794 adjustheap (periodics, periodiccnt, active);
1341 } 3795 }
3796 }
1342 3797
1343 ev_stop (EV_A_ (W)w); 3798 ev_stop (EV_A_ (W)w);
1344}
1345 3799
1346void 3800 EV_FREQUENT_CHECK;
1347ev_idle_start (EV_P_ struct ev_idle *w)
1348{
1349 if (ev_is_active (w))
1350 return;
1351
1352 ev_start (EV_A_ (W)w, ++idlecnt);
1353 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1354 idles [idlecnt - 1] = w;
1355} 3801}
1356 3802
1357void 3803void noinline
1358ev_idle_stop (EV_P_ struct ev_idle *w) 3804ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
1359{ 3805{
1360 ev_clear_pending (EV_A_ (W)w); 3806 /* TODO: use adjustheap and recalculation */
1361 if (ev_is_active (w))
1362 return;
1363
1364 idles [((W)w)->active - 1] = idles [--idlecnt];
1365 ev_stop (EV_A_ (W)w); 3807 ev_periodic_stop (EV_A_ w);
3808 ev_periodic_start (EV_A_ w);
1366} 3809}
1367 3810#endif
1368void
1369ev_prepare_start (EV_P_ struct ev_prepare *w)
1370{
1371 if (ev_is_active (w))
1372 return;
1373
1374 ev_start (EV_A_ (W)w, ++preparecnt);
1375 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1376 prepares [preparecnt - 1] = w;
1377}
1378
1379void
1380ev_prepare_stop (EV_P_ struct ev_prepare *w)
1381{
1382 ev_clear_pending (EV_A_ (W)w);
1383 if (ev_is_active (w))
1384 return;
1385
1386 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1387 ev_stop (EV_A_ (W)w);
1388}
1389
1390void
1391ev_check_start (EV_P_ struct ev_check *w)
1392{
1393 if (ev_is_active (w))
1394 return;
1395
1396 ev_start (EV_A_ (W)w, ++checkcnt);
1397 array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1398 checks [checkcnt - 1] = w;
1399}
1400
1401void
1402ev_check_stop (EV_P_ struct ev_check *w)
1403{
1404 ev_clear_pending (EV_A_ (W)w);
1405 if (ev_is_active (w))
1406 return;
1407
1408 checks [((W)w)->active - 1] = checks [--checkcnt];
1409 ev_stop (EV_A_ (W)w);
1410}
1411 3811
1412#ifndef SA_RESTART 3812#ifndef SA_RESTART
1413# define SA_RESTART 0 3813# define SA_RESTART 0
1414#endif 3814#endif
1415 3815
3816#if EV_SIGNAL_ENABLE
3817
3818void noinline
3819ev_signal_start (EV_P_ ev_signal *w) EV_THROW
3820{
3821 if (expect_false (ev_is_active (w)))
3822 return;
3823
3824 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3825
3826#if EV_MULTIPLICITY
3827 assert (("libev: a signal must not be attached to two different loops",
3828 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3829
3830 signals [w->signum - 1].loop = EV_A;
3831 ECB_MEMORY_FENCE_RELEASE;
3832#endif
3833
3834 EV_FREQUENT_CHECK;
3835
3836#if EV_USE_SIGNALFD
3837 if (sigfd == -2)
3838 {
3839 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3840 if (sigfd < 0 && errno == EINVAL)
3841 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3842
3843 if (sigfd >= 0)
3844 {
3845 fd_intern (sigfd); /* doing it twice will not hurt */
3846
3847 sigemptyset (&sigfd_set);
3848
3849 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3850 ev_set_priority (&sigfd_w, EV_MAXPRI);
3851 ev_io_start (EV_A_ &sigfd_w);
3852 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3853 }
3854 }
3855
3856 if (sigfd >= 0)
3857 {
3858 /* TODO: check .head */
3859 sigaddset (&sigfd_set, w->signum);
3860 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3861
3862 signalfd (sigfd, &sigfd_set, 0);
3863 }
3864#endif
3865
3866 ev_start (EV_A_ (W)w, 1);
3867 wlist_add (&signals [w->signum - 1].head, (WL)w);
3868
3869 if (!((WL)w)->next)
3870# if EV_USE_SIGNALFD
3871 if (sigfd < 0) /*TODO*/
3872# endif
3873 {
3874# ifdef _WIN32
3875 evpipe_init (EV_A);
3876
3877 signal (w->signum, ev_sighandler);
3878# else
3879 struct sigaction sa;
3880
3881 evpipe_init (EV_A);
3882
3883 sa.sa_handler = ev_sighandler;
3884 sigfillset (&sa.sa_mask);
3885 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3886 sigaction (w->signum, &sa, 0);
3887
3888 if (origflags & EVFLAG_NOSIGMASK)
3889 {
3890 sigemptyset (&sa.sa_mask);
3891 sigaddset (&sa.sa_mask, w->signum);
3892 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3893 }
3894#endif
3895 }
3896
3897 EV_FREQUENT_CHECK;
3898}
3899
3900void noinline
3901ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
3902{
3903 clear_pending (EV_A_ (W)w);
3904 if (expect_false (!ev_is_active (w)))
3905 return;
3906
3907 EV_FREQUENT_CHECK;
3908
3909 wlist_del (&signals [w->signum - 1].head, (WL)w);
3910 ev_stop (EV_A_ (W)w);
3911
3912 if (!signals [w->signum - 1].head)
3913 {
3914#if EV_MULTIPLICITY
3915 signals [w->signum - 1].loop = 0; /* unattach from signal */
3916#endif
3917#if EV_USE_SIGNALFD
3918 if (sigfd >= 0)
3919 {
3920 sigset_t ss;
3921
3922 sigemptyset (&ss);
3923 sigaddset (&ss, w->signum);
3924 sigdelset (&sigfd_set, w->signum);
3925
3926 signalfd (sigfd, &sigfd_set, 0);
3927 sigprocmask (SIG_UNBLOCK, &ss, 0);
3928 }
3929 else
3930#endif
3931 signal (w->signum, SIG_DFL);
3932 }
3933
3934 EV_FREQUENT_CHECK;
3935}
3936
3937#endif
3938
3939#if EV_CHILD_ENABLE
3940
1416void 3941void
1417ev_signal_start (EV_P_ struct ev_signal *w) 3942ev_child_start (EV_P_ ev_child *w) EV_THROW
1418{ 3943{
1419#if EV_MULTIPLICITY 3944#if EV_MULTIPLICITY
1420 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 3945 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1421#endif 3946#endif
1422 if (ev_is_active (w)) 3947 if (expect_false (ev_is_active (w)))
1423 return; 3948 return;
1424 3949
1425 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3950 EV_FREQUENT_CHECK;
1426 3951
1427 ev_start (EV_A_ (W)w, 1); 3952 ev_start (EV_A_ (W)w, 1);
1428 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 3953 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1429 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1430 3954
1431 if (!((WL)w)->next) 3955 EV_FREQUENT_CHECK;
3956}
3957
3958void
3959ev_child_stop (EV_P_ ev_child *w) EV_THROW
3960{
3961 clear_pending (EV_A_ (W)w);
3962 if (expect_false (!ev_is_active (w)))
3963 return;
3964
3965 EV_FREQUENT_CHECK;
3966
3967 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3968 ev_stop (EV_A_ (W)w);
3969
3970 EV_FREQUENT_CHECK;
3971}
3972
3973#endif
3974
3975#if EV_STAT_ENABLE
3976
3977# ifdef _WIN32
3978# undef lstat
3979# define lstat(a,b) _stati64 (a,b)
3980# endif
3981
3982#define DEF_STAT_INTERVAL 5.0074891
3983#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3984#define MIN_STAT_INTERVAL 0.1074891
3985
3986static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3987
3988#if EV_USE_INOTIFY
3989
3990/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3991# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3992
3993static void noinline
3994infy_add (EV_P_ ev_stat *w)
3995{
3996 w->wd = inotify_add_watch (fs_fd, w->path,
3997 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
3998 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
3999 | IN_DONT_FOLLOW | IN_MASK_ADD);
4000
4001 if (w->wd >= 0)
4002 {
4003 struct statfs sfs;
4004
4005 /* now local changes will be tracked by inotify, but remote changes won't */
4006 /* unless the filesystem is known to be local, we therefore still poll */
4007 /* also do poll on <2.6.25, but with normal frequency */
4008
4009 if (!fs_2625)
4010 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4011 else if (!statfs (w->path, &sfs)
4012 && (sfs.f_type == 0x1373 /* devfs */
4013 || sfs.f_type == 0x4006 /* fat */
4014 || sfs.f_type == 0x4d44 /* msdos */
4015 || sfs.f_type == 0xEF53 /* ext2/3 */
4016 || sfs.f_type == 0x72b6 /* jffs2 */
4017 || sfs.f_type == 0x858458f6 /* ramfs */
4018 || sfs.f_type == 0x5346544e /* ntfs */
4019 || sfs.f_type == 0x3153464a /* jfs */
4020 || sfs.f_type == 0x9123683e /* btrfs */
4021 || sfs.f_type == 0x52654973 /* reiser3 */
4022 || sfs.f_type == 0x01021994 /* tmpfs */
4023 || sfs.f_type == 0x58465342 /* xfs */))
4024 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4025 else
4026 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1432 { 4027 }
1433#if WIN32 4028 else
1434 signal (w->signum, sighandler); 4029 {
4030 /* can't use inotify, continue to stat */
4031 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4032
4033 /* if path is not there, monitor some parent directory for speedup hints */
4034 /* note that exceeding the hardcoded path limit is not a correctness issue, */
4035 /* but an efficiency issue only */
4036 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
4037 {
4038 char path [4096];
4039 strcpy (path, w->path);
4040
4041 do
4042 {
4043 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
4044 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
4045
4046 char *pend = strrchr (path, '/');
4047
4048 if (!pend || pend == path)
4049 break;
4050
4051 *pend = 0;
4052 w->wd = inotify_add_watch (fs_fd, path, mask);
4053 }
4054 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
4055 }
4056 }
4057
4058 if (w->wd >= 0)
4059 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4060
4061 /* now re-arm timer, if required */
4062 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4063 ev_timer_again (EV_A_ &w->timer);
4064 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4065}
4066
4067static void noinline
4068infy_del (EV_P_ ev_stat *w)
4069{
4070 int slot;
4071 int wd = w->wd;
4072
4073 if (wd < 0)
4074 return;
4075
4076 w->wd = -2;
4077 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
4078 wlist_del (&fs_hash [slot].head, (WL)w);
4079
4080 /* remove this watcher, if others are watching it, they will rearm */
4081 inotify_rm_watch (fs_fd, wd);
4082}
4083
4084static void noinline
4085infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
4086{
4087 if (slot < 0)
4088 /* overflow, need to check for all hash slots */
4089 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
4090 infy_wd (EV_A_ slot, wd, ev);
4091 else
4092 {
4093 WL w_;
4094
4095 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
4096 {
4097 ev_stat *w = (ev_stat *)w_;
4098 w_ = w_->next; /* lets us remove this watcher and all before it */
4099
4100 if (w->wd == wd || wd == -1)
4101 {
4102 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
4103 {
4104 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4105 w->wd = -1;
4106 infy_add (EV_A_ w); /* re-add, no matter what */
4107 }
4108
4109 stat_timer_cb (EV_A_ &w->timer, 0);
4110 }
4111 }
4112 }
4113}
4114
4115static void
4116infy_cb (EV_P_ ev_io *w, int revents)
4117{
4118 char buf [EV_INOTIFY_BUFSIZE];
4119 int ofs;
4120 int len = read (fs_fd, buf, sizeof (buf));
4121
4122 for (ofs = 0; ofs < len; )
4123 {
4124 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
4125 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4126 ofs += sizeof (struct inotify_event) + ev->len;
4127 }
4128}
4129
4130inline_size void ecb_cold
4131ev_check_2625 (EV_P)
4132{
4133 /* kernels < 2.6.25 are borked
4134 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4135 */
4136 if (ev_linux_version () < 0x020619)
4137 return;
4138
4139 fs_2625 = 1;
4140}
4141
4142inline_size int
4143infy_newfd (void)
4144{
4145#if defined IN_CLOEXEC && defined IN_NONBLOCK
4146 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4147 if (fd >= 0)
4148 return fd;
4149#endif
4150 return inotify_init ();
4151}
4152
4153inline_size void
4154infy_init (EV_P)
4155{
4156 if (fs_fd != -2)
4157 return;
4158
4159 fs_fd = -1;
4160
4161 ev_check_2625 (EV_A);
4162
4163 fs_fd = infy_newfd ();
4164
4165 if (fs_fd >= 0)
4166 {
4167 fd_intern (fs_fd);
4168 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
4169 ev_set_priority (&fs_w, EV_MAXPRI);
4170 ev_io_start (EV_A_ &fs_w);
4171 ev_unref (EV_A);
4172 }
4173}
4174
4175inline_size void
4176infy_fork (EV_P)
4177{
4178 int slot;
4179
4180 if (fs_fd < 0)
4181 return;
4182
4183 ev_ref (EV_A);
4184 ev_io_stop (EV_A_ &fs_w);
4185 close (fs_fd);
4186 fs_fd = infy_newfd ();
4187
4188 if (fs_fd >= 0)
4189 {
4190 fd_intern (fs_fd);
4191 ev_io_set (&fs_w, fs_fd, EV_READ);
4192 ev_io_start (EV_A_ &fs_w);
4193 ev_unref (EV_A);
4194 }
4195
4196 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
4197 {
4198 WL w_ = fs_hash [slot].head;
4199 fs_hash [slot].head = 0;
4200
4201 while (w_)
4202 {
4203 ev_stat *w = (ev_stat *)w_;
4204 w_ = w_->next; /* lets us add this watcher */
4205
4206 w->wd = -1;
4207
4208 if (fs_fd >= 0)
4209 infy_add (EV_A_ w); /* re-add, no matter what */
4210 else
4211 {
4212 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4213 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4214 ev_timer_again (EV_A_ &w->timer);
4215 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4216 }
4217 }
4218 }
4219}
4220
4221#endif
4222
4223#ifdef _WIN32
4224# define EV_LSTAT(p,b) _stati64 (p, b)
1435#else 4225#else
1436 struct sigaction sa; 4226# define EV_LSTAT(p,b) lstat (p, b)
1437 sa.sa_handler = sighandler;
1438 sigfillset (&sa.sa_mask);
1439 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1440 sigaction (w->signum, &sa, 0);
1441#endif 4227#endif
1442 }
1443}
1444 4228
1445void 4229void
1446ev_signal_stop (EV_P_ struct ev_signal *w) 4230ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
1447{ 4231{
1448 ev_clear_pending (EV_A_ (W)w); 4232 if (lstat (w->path, &w->attr) < 0)
1449 if (!ev_is_active (w)) 4233 w->attr.st_nlink = 0;
4234 else if (!w->attr.st_nlink)
4235 w->attr.st_nlink = 1;
4236}
4237
4238static void noinline
4239stat_timer_cb (EV_P_ ev_timer *w_, int revents)
4240{
4241 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
4242
4243 ev_statdata prev = w->attr;
4244 ev_stat_stat (EV_A_ w);
4245
4246 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
4247 if (
4248 prev.st_dev != w->attr.st_dev
4249 || prev.st_ino != w->attr.st_ino
4250 || prev.st_mode != w->attr.st_mode
4251 || prev.st_nlink != w->attr.st_nlink
4252 || prev.st_uid != w->attr.st_uid
4253 || prev.st_gid != w->attr.st_gid
4254 || prev.st_rdev != w->attr.st_rdev
4255 || prev.st_size != w->attr.st_size
4256 || prev.st_atime != w->attr.st_atime
4257 || prev.st_mtime != w->attr.st_mtime
4258 || prev.st_ctime != w->attr.st_ctime
4259 ) {
4260 /* we only update w->prev on actual differences */
4261 /* in case we test more often than invoke the callback, */
4262 /* to ensure that prev is always different to attr */
4263 w->prev = prev;
4264
4265 #if EV_USE_INOTIFY
4266 if (fs_fd >= 0)
4267 {
4268 infy_del (EV_A_ w);
4269 infy_add (EV_A_ w);
4270 ev_stat_stat (EV_A_ w); /* avoid race... */
4271 }
4272 #endif
4273
4274 ev_feed_event (EV_A_ w, EV_STAT);
4275 }
4276}
4277
4278void
4279ev_stat_start (EV_P_ ev_stat *w) EV_THROW
4280{
4281 if (expect_false (ev_is_active (w)))
1450 return; 4282 return;
1451 4283
1452 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 4284 ev_stat_stat (EV_A_ w);
4285
4286 if (w->interval < MIN_STAT_INTERVAL && w->interval)
4287 w->interval = MIN_STAT_INTERVAL;
4288
4289 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
4290 ev_set_priority (&w->timer, ev_priority (w));
4291
4292#if EV_USE_INOTIFY
4293 infy_init (EV_A);
4294
4295 if (fs_fd >= 0)
4296 infy_add (EV_A_ w);
4297 else
4298#endif
4299 {
4300 ev_timer_again (EV_A_ &w->timer);
4301 ev_unref (EV_A);
4302 }
4303
4304 ev_start (EV_A_ (W)w, 1);
4305
4306 EV_FREQUENT_CHECK;
4307}
4308
4309void
4310ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
4311{
4312 clear_pending (EV_A_ (W)w);
4313 if (expect_false (!ev_is_active (w)))
4314 return;
4315
4316 EV_FREQUENT_CHECK;
4317
4318#if EV_USE_INOTIFY
4319 infy_del (EV_A_ w);
4320#endif
4321
4322 if (ev_is_active (&w->timer))
4323 {
4324 ev_ref (EV_A);
4325 ev_timer_stop (EV_A_ &w->timer);
4326 }
4327
1453 ev_stop (EV_A_ (W)w); 4328 ev_stop (EV_A_ (W)w);
1454 4329
1455 if (!signals [w->signum - 1].head) 4330 EV_FREQUENT_CHECK;
1456 signal (w->signum, SIG_DFL);
1457} 4331}
4332#endif
1458 4333
4334#if EV_IDLE_ENABLE
1459void 4335void
1460ev_child_start (EV_P_ struct ev_child *w) 4336ev_idle_start (EV_P_ ev_idle *w) EV_THROW
1461{ 4337{
1462#if EV_MULTIPLICITY
1463 assert (("child watchers are only supported in the default loop", loop == default_loop));
1464#endif
1465 if (ev_is_active (w)) 4338 if (expect_false (ev_is_active (w)))
1466 return; 4339 return;
1467 4340
4341 pri_adjust (EV_A_ (W)w);
4342
4343 EV_FREQUENT_CHECK;
4344
4345 {
4346 int active = ++idlecnt [ABSPRI (w)];
4347
4348 ++idleall;
4349 ev_start (EV_A_ (W)w, active);
4350
4351 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
4352 idles [ABSPRI (w)][active - 1] = w;
4353 }
4354
4355 EV_FREQUENT_CHECK;
4356}
4357
4358void
4359ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
4360{
4361 clear_pending (EV_A_ (W)w);
4362 if (expect_false (!ev_is_active (w)))
4363 return;
4364
4365 EV_FREQUENT_CHECK;
4366
4367 {
4368 int active = ev_active (w);
4369
4370 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
4371 ev_active (idles [ABSPRI (w)][active - 1]) = active;
4372
4373 ev_stop (EV_A_ (W)w);
4374 --idleall;
4375 }
4376
4377 EV_FREQUENT_CHECK;
4378}
4379#endif
4380
4381#if EV_PREPARE_ENABLE
4382void
4383ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
4384{
4385 if (expect_false (ev_is_active (w)))
4386 return;
4387
4388 EV_FREQUENT_CHECK;
4389
4390 ev_start (EV_A_ (W)w, ++preparecnt);
4391 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
4392 prepares [preparecnt - 1] = w;
4393
4394 EV_FREQUENT_CHECK;
4395}
4396
4397void
4398ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
4399{
4400 clear_pending (EV_A_ (W)w);
4401 if (expect_false (!ev_is_active (w)))
4402 return;
4403
4404 EV_FREQUENT_CHECK;
4405
4406 {
4407 int active = ev_active (w);
4408
4409 prepares [active - 1] = prepares [--preparecnt];
4410 ev_active (prepares [active - 1]) = active;
4411 }
4412
4413 ev_stop (EV_A_ (W)w);
4414
4415 EV_FREQUENT_CHECK;
4416}
4417#endif
4418
4419#if EV_CHECK_ENABLE
4420void
4421ev_check_start (EV_P_ ev_check *w) EV_THROW
4422{
4423 if (expect_false (ev_is_active (w)))
4424 return;
4425
4426 EV_FREQUENT_CHECK;
4427
4428 ev_start (EV_A_ (W)w, ++checkcnt);
4429 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
4430 checks [checkcnt - 1] = w;
4431
4432 EV_FREQUENT_CHECK;
4433}
4434
4435void
4436ev_check_stop (EV_P_ ev_check *w) EV_THROW
4437{
4438 clear_pending (EV_A_ (W)w);
4439 if (expect_false (!ev_is_active (w)))
4440 return;
4441
4442 EV_FREQUENT_CHECK;
4443
4444 {
4445 int active = ev_active (w);
4446
4447 checks [active - 1] = checks [--checkcnt];
4448 ev_active (checks [active - 1]) = active;
4449 }
4450
4451 ev_stop (EV_A_ (W)w);
4452
4453 EV_FREQUENT_CHECK;
4454}
4455#endif
4456
4457#if EV_EMBED_ENABLE
4458void noinline
4459ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
4460{
4461 ev_run (w->other, EVRUN_NOWAIT);
4462}
4463
4464static void
4465embed_io_cb (EV_P_ ev_io *io, int revents)
4466{
4467 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
4468
4469 if (ev_cb (w))
4470 ev_feed_event (EV_A_ (W)w, EV_EMBED);
4471 else
4472 ev_run (w->other, EVRUN_NOWAIT);
4473}
4474
4475static void
4476embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4477{
4478 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4479
4480 {
4481 EV_P = w->other;
4482
4483 while (fdchangecnt)
4484 {
4485 fd_reify (EV_A);
4486 ev_run (EV_A_ EVRUN_NOWAIT);
4487 }
4488 }
4489}
4490
4491static void
4492embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4493{
4494 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4495
4496 ev_embed_stop (EV_A_ w);
4497
4498 {
4499 EV_P = w->other;
4500
4501 ev_loop_fork (EV_A);
4502 ev_run (EV_A_ EVRUN_NOWAIT);
4503 }
4504
4505 ev_embed_start (EV_A_ w);
4506}
4507
4508#if 0
4509static void
4510embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4511{
4512 ev_idle_stop (EV_A_ idle);
4513}
4514#endif
4515
4516void
4517ev_embed_start (EV_P_ ev_embed *w) EV_THROW
4518{
4519 if (expect_false (ev_is_active (w)))
4520 return;
4521
4522 {
4523 EV_P = w->other;
4524 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4525 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4526 }
4527
4528 EV_FREQUENT_CHECK;
4529
4530 ev_set_priority (&w->io, ev_priority (w));
4531 ev_io_start (EV_A_ &w->io);
4532
4533 ev_prepare_init (&w->prepare, embed_prepare_cb);
4534 ev_set_priority (&w->prepare, EV_MINPRI);
4535 ev_prepare_start (EV_A_ &w->prepare);
4536
4537 ev_fork_init (&w->fork, embed_fork_cb);
4538 ev_fork_start (EV_A_ &w->fork);
4539
4540 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4541
1468 ev_start (EV_A_ (W)w, 1); 4542 ev_start (EV_A_ (W)w, 1);
1469 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 4543
4544 EV_FREQUENT_CHECK;
1470} 4545}
1471 4546
1472void 4547void
1473ev_child_stop (EV_P_ struct ev_child *w) 4548ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
1474{ 4549{
1475 ev_clear_pending (EV_A_ (W)w); 4550 clear_pending (EV_A_ (W)w);
1476 if (ev_is_active (w)) 4551 if (expect_false (!ev_is_active (w)))
1477 return; 4552 return;
1478 4553
1479 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 4554 EV_FREQUENT_CHECK;
4555
4556 ev_io_stop (EV_A_ &w->io);
4557 ev_prepare_stop (EV_A_ &w->prepare);
4558 ev_fork_stop (EV_A_ &w->fork);
4559
1480 ev_stop (EV_A_ (W)w); 4560 ev_stop (EV_A_ (W)w);
4561
4562 EV_FREQUENT_CHECK;
1481} 4563}
4564#endif
4565
4566#if EV_FORK_ENABLE
4567void
4568ev_fork_start (EV_P_ ev_fork *w) EV_THROW
4569{
4570 if (expect_false (ev_is_active (w)))
4571 return;
4572
4573 EV_FREQUENT_CHECK;
4574
4575 ev_start (EV_A_ (W)w, ++forkcnt);
4576 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4577 forks [forkcnt - 1] = w;
4578
4579 EV_FREQUENT_CHECK;
4580}
4581
4582void
4583ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
4584{
4585 clear_pending (EV_A_ (W)w);
4586 if (expect_false (!ev_is_active (w)))
4587 return;
4588
4589 EV_FREQUENT_CHECK;
4590
4591 {
4592 int active = ev_active (w);
4593
4594 forks [active - 1] = forks [--forkcnt];
4595 ev_active (forks [active - 1]) = active;
4596 }
4597
4598 ev_stop (EV_A_ (W)w);
4599
4600 EV_FREQUENT_CHECK;
4601}
4602#endif
4603
4604#if EV_CLEANUP_ENABLE
4605void
4606ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4607{
4608 if (expect_false (ev_is_active (w)))
4609 return;
4610
4611 EV_FREQUENT_CHECK;
4612
4613 ev_start (EV_A_ (W)w, ++cleanupcnt);
4614 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4615 cleanups [cleanupcnt - 1] = w;
4616
4617 /* cleanup watchers should never keep a refcount on the loop */
4618 ev_unref (EV_A);
4619 EV_FREQUENT_CHECK;
4620}
4621
4622void
4623ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4624{
4625 clear_pending (EV_A_ (W)w);
4626 if (expect_false (!ev_is_active (w)))
4627 return;
4628
4629 EV_FREQUENT_CHECK;
4630 ev_ref (EV_A);
4631
4632 {
4633 int active = ev_active (w);
4634
4635 cleanups [active - 1] = cleanups [--cleanupcnt];
4636 ev_active (cleanups [active - 1]) = active;
4637 }
4638
4639 ev_stop (EV_A_ (W)w);
4640
4641 EV_FREQUENT_CHECK;
4642}
4643#endif
4644
4645#if EV_ASYNC_ENABLE
4646void
4647ev_async_start (EV_P_ ev_async *w) EV_THROW
4648{
4649 if (expect_false (ev_is_active (w)))
4650 return;
4651
4652 w->sent = 0;
4653
4654 evpipe_init (EV_A);
4655
4656 EV_FREQUENT_CHECK;
4657
4658 ev_start (EV_A_ (W)w, ++asynccnt);
4659 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4660 asyncs [asynccnt - 1] = w;
4661
4662 EV_FREQUENT_CHECK;
4663}
4664
4665void
4666ev_async_stop (EV_P_ ev_async *w) EV_THROW
4667{
4668 clear_pending (EV_A_ (W)w);
4669 if (expect_false (!ev_is_active (w)))
4670 return;
4671
4672 EV_FREQUENT_CHECK;
4673
4674 {
4675 int active = ev_active (w);
4676
4677 asyncs [active - 1] = asyncs [--asynccnt];
4678 ev_active (asyncs [active - 1]) = active;
4679 }
4680
4681 ev_stop (EV_A_ (W)w);
4682
4683 EV_FREQUENT_CHECK;
4684}
4685
4686void
4687ev_async_send (EV_P_ ev_async *w) EV_THROW
4688{
4689 w->sent = 1;
4690 evpipe_write (EV_A_ &async_pending);
4691}
4692#endif
1482 4693
1483/*****************************************************************************/ 4694/*****************************************************************************/
1484 4695
1485struct ev_once 4696struct ev_once
1486{ 4697{
1487 struct ev_io io; 4698 ev_io io;
1488 struct ev_timer to; 4699 ev_timer to;
1489 void (*cb)(int revents, void *arg); 4700 void (*cb)(int revents, void *arg);
1490 void *arg; 4701 void *arg;
1491}; 4702};
1492 4703
1493static void 4704static void
1494once_cb (EV_P_ struct ev_once *once, int revents) 4705once_cb (EV_P_ struct ev_once *once, int revents)
1495{ 4706{
1496 void (*cb)(int revents, void *arg) = once->cb; 4707 void (*cb)(int revents, void *arg) = once->cb;
1497 void *arg = once->arg; 4708 void *arg = once->arg;
1498 4709
1499 ev_io_stop (EV_A_ &once->io); 4710 ev_io_stop (EV_A_ &once->io);
1500 ev_timer_stop (EV_A_ &once->to); 4711 ev_timer_stop (EV_A_ &once->to);
1501 ev_free (once); 4712 ev_free (once);
1502 4713
1503 cb (revents, arg); 4714 cb (revents, arg);
1504} 4715}
1505 4716
1506static void 4717static void
1507once_cb_io (EV_P_ struct ev_io *w, int revents) 4718once_cb_io (EV_P_ ev_io *w, int revents)
1508{ 4719{
1509 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4720 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4721
4722 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1510} 4723}
1511 4724
1512static void 4725static void
1513once_cb_to (EV_P_ struct ev_timer *w, int revents) 4726once_cb_to (EV_P_ ev_timer *w, int revents)
1514{ 4727{
1515 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4728 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4729
4730 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1516} 4731}
1517 4732
1518void 4733void
1519ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4734ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
1520{ 4735{
1521 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4736 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1522 4737
1523 if (!once) 4738 if (expect_false (!once))
4739 {
1524 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4740 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1525 else 4741 return;
1526 { 4742 }
4743
1527 once->cb = cb; 4744 once->cb = cb;
1528 once->arg = arg; 4745 once->arg = arg;
1529 4746
1530 ev_watcher_init (&once->io, once_cb_io); 4747 ev_init (&once->io, once_cb_io);
1531 if (fd >= 0) 4748 if (fd >= 0)
4749 {
4750 ev_io_set (&once->io, fd, events);
4751 ev_io_start (EV_A_ &once->io);
4752 }
4753
4754 ev_init (&once->to, once_cb_to);
4755 if (timeout >= 0.)
4756 {
4757 ev_timer_set (&once->to, timeout, 0.);
4758 ev_timer_start (EV_A_ &once->to);
4759 }
4760}
4761
4762/*****************************************************************************/
4763
4764#if EV_WALK_ENABLE
4765void ecb_cold
4766ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4767{
4768 int i, j;
4769 ev_watcher_list *wl, *wn;
4770
4771 if (types & (EV_IO | EV_EMBED))
4772 for (i = 0; i < anfdmax; ++i)
4773 for (wl = anfds [i].head; wl; )
1532 { 4774 {
1533 ev_io_set (&once->io, fd, events); 4775 wn = wl->next;
1534 ev_io_start (EV_A_ &once->io); 4776
4777#if EV_EMBED_ENABLE
4778 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4779 {
4780 if (types & EV_EMBED)
4781 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4782 }
4783 else
4784#endif
4785#if EV_USE_INOTIFY
4786 if (ev_cb ((ev_io *)wl) == infy_cb)
4787 ;
4788 else
4789#endif
4790 if ((ev_io *)wl != &pipe_w)
4791 if (types & EV_IO)
4792 cb (EV_A_ EV_IO, wl);
4793
4794 wl = wn;
1535 } 4795 }
1536 4796
1537 ev_watcher_init (&once->to, once_cb_to); 4797 if (types & (EV_TIMER | EV_STAT))
1538 if (timeout >= 0.) 4798 for (i = timercnt + HEAP0; i-- > HEAP0; )
4799#if EV_STAT_ENABLE
4800 /*TODO: timer is not always active*/
4801 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1539 { 4802 {
1540 ev_timer_set (&once->to, timeout, 0.); 4803 if (types & EV_STAT)
1541 ev_timer_start (EV_A_ &once->to); 4804 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1542 } 4805 }
1543 } 4806 else
1544} 4807#endif
4808 if (types & EV_TIMER)
4809 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1545 4810
4811#if EV_PERIODIC_ENABLE
4812 if (types & EV_PERIODIC)
4813 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4814 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4815#endif
4816
4817#if EV_IDLE_ENABLE
4818 if (types & EV_IDLE)
4819 for (j = NUMPRI; j--; )
4820 for (i = idlecnt [j]; i--; )
4821 cb (EV_A_ EV_IDLE, idles [j][i]);
4822#endif
4823
4824#if EV_FORK_ENABLE
4825 if (types & EV_FORK)
4826 for (i = forkcnt; i--; )
4827 if (ev_cb (forks [i]) != embed_fork_cb)
4828 cb (EV_A_ EV_FORK, forks [i]);
4829#endif
4830
4831#if EV_ASYNC_ENABLE
4832 if (types & EV_ASYNC)
4833 for (i = asynccnt; i--; )
4834 cb (EV_A_ EV_ASYNC, asyncs [i]);
4835#endif
4836
4837#if EV_PREPARE_ENABLE
4838 if (types & EV_PREPARE)
4839 for (i = preparecnt; i--; )
4840# if EV_EMBED_ENABLE
4841 if (ev_cb (prepares [i]) != embed_prepare_cb)
4842# endif
4843 cb (EV_A_ EV_PREPARE, prepares [i]);
4844#endif
4845
4846#if EV_CHECK_ENABLE
4847 if (types & EV_CHECK)
4848 for (i = checkcnt; i--; )
4849 cb (EV_A_ EV_CHECK, checks [i]);
4850#endif
4851
4852#if EV_SIGNAL_ENABLE
4853 if (types & EV_SIGNAL)
4854 for (i = 0; i < EV_NSIG - 1; ++i)
4855 for (wl = signals [i].head; wl; )
4856 {
4857 wn = wl->next;
4858 cb (EV_A_ EV_SIGNAL, wl);
4859 wl = wn;
4860 }
4861#endif
4862
4863#if EV_CHILD_ENABLE
4864 if (types & EV_CHILD)
4865 for (i = (EV_PID_HASHSIZE); i--; )
4866 for (wl = childs [i]; wl; )
4867 {
4868 wn = wl->next;
4869 cb (EV_A_ EV_CHILD, wl);
4870 wl = wn;
4871 }
4872#endif
4873/* EV_STAT 0x00001000 /* stat data changed */
4874/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4875}
4876#endif
4877
4878#if EV_MULTIPLICITY
4879 #include "ev_wrap.h"
4880#endif
4881

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