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Comparing libev/ev.c (file contents):
Revision 1.125 by root, Sat Nov 17 02:28:43 2007 UTC vs.
Revision 1.442 by root, Thu May 31 15:47:59 2012 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 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 */
31 39
32#ifdef __cplusplus 40/* this big block deduces configuration from config.h */
33extern "C" {
34#endif
35
36#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H
44# else
37# 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
38 67
39# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
40# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
41# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
42# endif 71# endif
43# ifndef EV_USE_REALTIME 72# ifndef EV_USE_REALTIME
44# 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
45# endif 81# endif
46# endif 82# endif
47 83
48# if HAVE_SELECT && HAVE_SYS_SELECT_H && !defined (EV_USE_SELECT) 84# if HAVE_NANOSLEEP
49# define EV_USE_SELECT 1 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
50# endif 91# endif
51 92
52# if HAVE_POLL && HAVE_POLL_H && !defined (EV_USE_POLL) 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
53# define EV_USE_POLL 1 99# define EV_USE_SELECT 0
54# endif 100# endif
55 101
56# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H && !defined (EV_USE_EPOLL) 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
57# define EV_USE_EPOLL 1 108# define EV_USE_POLL 0
58# endif 109# endif
59 110
60# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H && !defined (EV_USE_KQUEUE) 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
61# define EV_USE_KQUEUE 1 112# ifndef EV_USE_EPOLL
113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
62# endif 118# endif
63 119
64# if HAVE_PORT_H && HAVE_PORT_CREATE && !defined (EV_USE_PORT) 120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
65# define EV_USE_PORT 1 121# ifndef EV_USE_KQUEUE
122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
66# endif 127# endif
67 128
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
68#endif 136# endif
69 137
70#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
71#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
72#include <fcntl.h> 169#include <fcntl.h>
73#include <stddef.h> 170#include <stddef.h>
74 171
75#include <stdio.h> 172#include <stdio.h>
76 173
77#include <assert.h> 174#include <assert.h>
78#include <errno.h> 175#include <errno.h>
79#include <sys/types.h> 176#include <sys/types.h>
80#include <time.h> 177#include <time.h>
178#include <limits.h>
81 179
82#include <signal.h> 180#include <signal.h>
83 181
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
84#ifndef _WIN32 199#ifndef _WIN32
85# include <unistd.h>
86# include <sys/time.h> 200# include <sys/time.h>
87# include <sys/wait.h> 201# include <sys/wait.h>
202# include <unistd.h>
88#else 203#else
204# include <io.h>
89# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
90# include <windows.h> 207# include <windows.h>
91# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
92# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
93# endif 210# endif
211# undef EV_AVOID_STDIO
212#endif
213
214/* OS X, in its infinite idiocy, actually HARDCODES
215 * a limit of 1024 into their select. Where people have brains,
216 * OS X engineers apparently have a vacuum. Or maybe they were
217 * ordered to have a vacuum, or they do anything for money.
218 * This might help. Or not.
219 */
220#define _DARWIN_UNLIMITED_SELECT 1
221
222/* this block tries to deduce configuration from header-defined symbols and defaults */
223
224/* try to deduce the maximum number of signals on this platform */
225#if defined EV_NSIG
226/* use what's provided */
227#elif defined NSIG
228# define EV_NSIG (NSIG)
229#elif defined _NSIG
230# define EV_NSIG (_NSIG)
231#elif defined SIGMAX
232# define EV_NSIG (SIGMAX+1)
233#elif defined SIG_MAX
234# define EV_NSIG (SIG_MAX+1)
235#elif defined _SIG_MAX
236# define EV_NSIG (_SIG_MAX+1)
237#elif defined MAXSIG
238# define EV_NSIG (MAXSIG+1)
239#elif defined MAX_SIG
240# define EV_NSIG (MAX_SIG+1)
241#elif defined SIGARRAYSIZE
242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
243#elif defined _sys_nsig
244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
245#else
246# error "unable to find value for NSIG, please report"
247/* to make it compile regardless, just remove the above line, */
248/* but consider reporting it, too! :) */
249# define EV_NSIG 65
250#endif
251
252#ifndef EV_USE_FLOOR
253# define EV_USE_FLOOR 0
254#endif
255
256#ifndef EV_USE_CLOCK_SYSCALL
257# if __linux && __GLIBC__ >= 2
258# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
259# else
260# define EV_USE_CLOCK_SYSCALL 0
94#endif 261# endif
95 262#endif
96/**/
97 263
98#ifndef EV_USE_MONOTONIC 264#ifndef EV_USE_MONOTONIC
265# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
266# define EV_USE_MONOTONIC EV_FEATURE_OS
267# else
99# define EV_USE_MONOTONIC 0 268# define EV_USE_MONOTONIC 0
269# endif
100#endif 270#endif
101 271
102#ifndef EV_USE_REALTIME 272#ifndef EV_USE_REALTIME
103# define EV_USE_REALTIME 0 273# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
274#endif
275
276#ifndef EV_USE_NANOSLEEP
277# if _POSIX_C_SOURCE >= 199309L
278# define EV_USE_NANOSLEEP EV_FEATURE_OS
279# else
280# define EV_USE_NANOSLEEP 0
281# endif
104#endif 282#endif
105 283
106#ifndef EV_USE_SELECT 284#ifndef EV_USE_SELECT
107# define EV_USE_SELECT 1 285# define EV_USE_SELECT EV_FEATURE_BACKENDS
108#endif 286#endif
109 287
110#ifndef EV_USE_POLL 288#ifndef EV_USE_POLL
111# ifdef _WIN32 289# ifdef _WIN32
112# define EV_USE_POLL 0 290# define EV_USE_POLL 0
113# else 291# else
114# define EV_USE_POLL 1 292# define EV_USE_POLL EV_FEATURE_BACKENDS
115# endif 293# endif
116#endif 294#endif
117 295
118#ifndef EV_USE_EPOLL 296#ifndef EV_USE_EPOLL
297# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
298# define EV_USE_EPOLL EV_FEATURE_BACKENDS
299# else
119# define EV_USE_EPOLL 0 300# define EV_USE_EPOLL 0
301# endif
120#endif 302#endif
121 303
122#ifndef EV_USE_KQUEUE 304#ifndef EV_USE_KQUEUE
123# define EV_USE_KQUEUE 0 305# define EV_USE_KQUEUE 0
124#endif 306#endif
125 307
126#ifndef EV_USE_PORT 308#ifndef EV_USE_PORT
127# define EV_USE_PORT 0 309# define EV_USE_PORT 0
128#endif 310#endif
129 311
130/**/ 312#ifndef EV_USE_INOTIFY
313# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
314# define EV_USE_INOTIFY EV_FEATURE_OS
315# else
316# define EV_USE_INOTIFY 0
317# endif
318#endif
131 319
132/* darwin simply cannot be helped */ 320#ifndef EV_PID_HASHSIZE
133#ifdef __APPLE__ 321# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
322#endif
323
324#ifndef EV_INOTIFY_HASHSIZE
325# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
326#endif
327
328#ifndef EV_USE_EVENTFD
329# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
330# define EV_USE_EVENTFD EV_FEATURE_OS
331# else
332# define EV_USE_EVENTFD 0
333# endif
334#endif
335
336#ifndef EV_USE_SIGNALFD
337# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
338# define EV_USE_SIGNALFD EV_FEATURE_OS
339# else
340# define EV_USE_SIGNALFD 0
341# endif
342#endif
343
344#if 0 /* debugging */
345# define EV_VERIFY 3
346# define EV_USE_4HEAP 1
347# define EV_HEAP_CACHE_AT 1
348#endif
349
350#ifndef EV_VERIFY
351# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
352#endif
353
354#ifndef EV_USE_4HEAP
355# define EV_USE_4HEAP EV_FEATURE_DATA
356#endif
357
358#ifndef EV_HEAP_CACHE_AT
359# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
360#endif
361
362/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
363/* which makes programs even slower. might work on other unices, too. */
364#if EV_USE_CLOCK_SYSCALL
365# include <sys/syscall.h>
366# ifdef SYS_clock_gettime
367# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
368# undef EV_USE_MONOTONIC
369# define EV_USE_MONOTONIC 1
370# else
371# undef EV_USE_CLOCK_SYSCALL
372# define EV_USE_CLOCK_SYSCALL 0
373# endif
374#endif
375
376/* this block fixes any misconfiguration where we know we run into trouble otherwise */
377
378#ifdef _AIX
379/* AIX has a completely broken poll.h header */
134# undef EV_USE_POLL 380# undef EV_USE_POLL
135# undef EV_USE_KQUEUE 381# define EV_USE_POLL 0
136#endif 382#endif
137 383
138#ifndef CLOCK_MONOTONIC 384#ifndef CLOCK_MONOTONIC
139# undef EV_USE_MONOTONIC 385# undef EV_USE_MONOTONIC
140# define EV_USE_MONOTONIC 0 386# define EV_USE_MONOTONIC 0
… …
143#ifndef CLOCK_REALTIME 389#ifndef CLOCK_REALTIME
144# undef EV_USE_REALTIME 390# undef EV_USE_REALTIME
145# define EV_USE_REALTIME 0 391# define EV_USE_REALTIME 0
146#endif 392#endif
147 393
148#if EV_SELECT_IS_WINSOCKET 394#if !EV_STAT_ENABLE
395# undef EV_USE_INOTIFY
396# define EV_USE_INOTIFY 0
397#endif
398
399#if !EV_USE_NANOSLEEP
400/* hp-ux has it in sys/time.h, which we unconditionally include above */
401# if !defined _WIN32 && !defined __hpux
402# include <sys/select.h>
403# endif
404#endif
405
406#if EV_USE_INOTIFY
407# include <sys/statfs.h>
408# include <sys/inotify.h>
409/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
410# ifndef IN_DONT_FOLLOW
411# undef EV_USE_INOTIFY
412# define EV_USE_INOTIFY 0
413# endif
414#endif
415
416#if EV_USE_EVENTFD
417/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
149# include <winsock.h> 418# include <stdint.h>
419# ifndef EFD_NONBLOCK
420# define EFD_NONBLOCK O_NONBLOCK
421# endif
422# ifndef EFD_CLOEXEC
423# ifdef O_CLOEXEC
424# define EFD_CLOEXEC O_CLOEXEC
425# else
426# define EFD_CLOEXEC 02000000
427# endif
428# endif
429EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
430#endif
431
432#if EV_USE_SIGNALFD
433/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
434# include <stdint.h>
435# ifndef SFD_NONBLOCK
436# define SFD_NONBLOCK O_NONBLOCK
437# endif
438# ifndef SFD_CLOEXEC
439# ifdef O_CLOEXEC
440# define SFD_CLOEXEC O_CLOEXEC
441# else
442# define SFD_CLOEXEC 02000000
443# endif
444# endif
445EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
446
447struct signalfd_siginfo
448{
449 uint32_t ssi_signo;
450 char pad[128 - sizeof (uint32_t)];
451};
150#endif 452#endif
151 453
152/**/ 454/**/
455
456#if EV_VERIFY >= 3
457# define EV_FREQUENT_CHECK ev_verify (EV_A)
458#else
459# define EV_FREQUENT_CHECK do { } while (0)
460#endif
461
462/*
463 * This is used to work around floating point rounding problems.
464 * This value is good at least till the year 4000.
465 */
466#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
467/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
153 468
154#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 469#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
155#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 470#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
156#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
157/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
158 471
472#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
473#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
474
475/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
476/* ECB.H BEGIN */
477/*
478 * libecb - http://software.schmorp.de/pkg/libecb
479 *
480 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
481 * Copyright (©) 2011 Emanuele Giaquinta
482 * All rights reserved.
483 *
484 * Redistribution and use in source and binary forms, with or without modifica-
485 * tion, are permitted provided that the following conditions are met:
486 *
487 * 1. Redistributions of source code must retain the above copyright notice,
488 * this list of conditions and the following disclaimer.
489 *
490 * 2. Redistributions in binary form must reproduce the above copyright
491 * notice, this list of conditions and the following disclaimer in the
492 * documentation and/or other materials provided with the distribution.
493 *
494 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
495 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
496 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
497 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
498 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
499 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
500 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
501 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
502 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
503 * OF THE POSSIBILITY OF SUCH DAMAGE.
504 */
505
159#ifdef EV_H 506#ifndef ECB_H
160# include EV_H 507#define ECB_H
508
509/* 16 bits major, 16 bits minor */
510#define ECB_VERSION 0x00010001
511
512#ifdef _WIN32
513 typedef signed char int8_t;
514 typedef unsigned char uint8_t;
515 typedef signed short int16_t;
516 typedef unsigned short uint16_t;
517 typedef signed int int32_t;
518 typedef unsigned int uint32_t;
519 #if __GNUC__
520 typedef signed long long int64_t;
521 typedef unsigned long long uint64_t;
522 #else /* _MSC_VER || __BORLANDC__ */
523 typedef signed __int64 int64_t;
524 typedef unsigned __int64 uint64_t;
525 #endif
526 #ifdef _WIN64
527 #define ECB_PTRSIZE 8
528 typedef uint64_t uintptr_t;
529 typedef int64_t intptr_t;
530 #else
531 #define ECB_PTRSIZE 4
532 typedef uint32_t uintptr_t;
533 typedef int32_t intptr_t;
534 #endif
535 typedef intptr_t ptrdiff_t;
161#else 536#else
162# include "ev.h" 537 #include <inttypes.h>
538 #if UINTMAX_MAX > 0xffffffffU
539 #define ECB_PTRSIZE 8
540 #else
541 #define ECB_PTRSIZE 4
163#endif 542 #endif
543#endif
164 544
165#if __GNUC__ >= 3 545/* many compilers define _GNUC_ to some versions but then only implement
166# define expect(expr,value) __builtin_expect ((expr),(value)) 546 * what their idiot authors think are the "more important" extensions,
167# define inline static inline 547 * causing enormous grief in return for some better fake benchmark numbers.
548 * or so.
549 * we try to detect these and simply assume they are not gcc - if they have
550 * an issue with that they should have done it right in the first place.
551 */
552#ifndef ECB_GCC_VERSION
553 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
554 #define ECB_GCC_VERSION(major,minor) 0
555 #else
556 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
557 #endif
558#endif
559
560#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
561#define ECB_C99 (__STDC_VERSION__ >= 199901L)
562#define ECB_C11 (__STDC_VERSION__ >= 201112L)
563#define ECB_CPP (__cplusplus+0)
564#define ECB_CPP11 (__cplusplus >= 201103L)
565
566/*****************************************************************************/
567
568/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
569/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
570
571#if ECB_NO_THREADS
572 #define ECB_NO_SMP 1
573#endif
574
575#if ECB_NO_SMP
576 #define ECB_MEMORY_FENCE do { } while (0)
577#endif
578
579#ifndef ECB_MEMORY_FENCE
580 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
581 #if __i386 || __i386__
582 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
583 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
584 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
585 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
586 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
587 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
588 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
589 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
590 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
591 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
592 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
593 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
594 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
595 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
596 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
597 #elif __sparc || __sparc__
598 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
599 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
600 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
601 #elif defined __s390__ || defined __s390x__
602 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
603 #elif defined __mips__
604 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
605 #elif defined __alpha__
606 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
607 #elif defined __hppa__
608 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
609 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
610 #elif defined __ia64__
611 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
612 #endif
613 #endif
614#endif
615
616#ifndef ECB_MEMORY_FENCE
617 #if ECB_GCC_VERSION(4,7)
618 /* see comment below (stdatomic.h) about the C11 memory model. */
619 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
620 #elif defined __clang && __has_feature (cxx_atomic)
621 /* see comment below (stdatomic.h) about the C11 memory model. */
622 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
623 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
624 #define ECB_MEMORY_FENCE __sync_synchronize ()
625 #elif _MSC_VER >= 1400 /* VC++ 2005 */
626 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
627 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
628 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
629 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
630 #elif defined _WIN32
631 #include <WinNT.h>
632 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
633 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
634 #include <mbarrier.h>
635 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
636 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
637 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
638 #elif __xlC__
639 #define ECB_MEMORY_FENCE __sync ()
640 #endif
641#endif
642
643#ifndef ECB_MEMORY_FENCE
644 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
645 /* we assume that these memory fences work on all variables/all memory accesses, */
646 /* not just C11 atomics and atomic accesses */
647 #include <stdatomic.h>
648 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
649 /* any fence other than seq_cst, which isn't very efficient for us. */
650 /* Why that is, we don't know - either the C11 memory model is quite useless */
651 /* for most usages, or gcc and clang have a bug */
652 /* I *currently* lean towards the latter, and inefficiently implement */
653 /* all three of ecb's fences as a seq_cst fence */
654 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
655 #endif
656#endif
657
658#ifndef ECB_MEMORY_FENCE
659 #if !ECB_AVOID_PTHREADS
660 /*
661 * if you get undefined symbol references to pthread_mutex_lock,
662 * or failure to find pthread.h, then you should implement
663 * the ECB_MEMORY_FENCE operations for your cpu/compiler
664 * OR provide pthread.h and link against the posix thread library
665 * of your system.
666 */
667 #include <pthread.h>
668 #define ECB_NEEDS_PTHREADS 1
669 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
670
671 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
672 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
673 #endif
674#endif
675
676#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
677 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
678#endif
679
680#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
681 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
682#endif
683
684/*****************************************************************************/
685
686#if __cplusplus
687 #define ecb_inline static inline
688#elif ECB_GCC_VERSION(2,5)
689 #define ecb_inline static __inline__
690#elif ECB_C99
691 #define ecb_inline static inline
168#else 692#else
693 #define ecb_inline static
694#endif
695
696#if ECB_GCC_VERSION(3,3)
697 #define ecb_restrict __restrict__
698#elif ECB_C99
699 #define ecb_restrict restrict
700#else
701 #define ecb_restrict
702#endif
703
704typedef int ecb_bool;
705
706#define ECB_CONCAT_(a, b) a ## b
707#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
708#define ECB_STRINGIFY_(a) # a
709#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
710
711#define ecb_function_ ecb_inline
712
713#if ECB_GCC_VERSION(3,1)
714 #define ecb_attribute(attrlist) __attribute__(attrlist)
715 #define ecb_is_constant(expr) __builtin_constant_p (expr)
716 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
717 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
718#else
719 #define ecb_attribute(attrlist)
720 #define ecb_is_constant(expr) 0
169# define expect(expr,value) (expr) 721 #define ecb_expect(expr,value) (expr)
170# define inline static 722 #define ecb_prefetch(addr,rw,locality)
171#endif 723#endif
172 724
725/* no emulation for ecb_decltype */
726#if ECB_GCC_VERSION(4,5)
727 #define ecb_decltype(x) __decltype(x)
728#elif ECB_GCC_VERSION(3,0)
729 #define ecb_decltype(x) __typeof(x)
730#endif
731
732#define ecb_noinline ecb_attribute ((__noinline__))
733#define ecb_unused ecb_attribute ((__unused__))
734#define ecb_const ecb_attribute ((__const__))
735#define ecb_pure ecb_attribute ((__pure__))
736
737#if ECB_C11
738 #define ecb_noreturn _Noreturn
739#else
740 #define ecb_noreturn ecb_attribute ((__noreturn__))
741#endif
742
743#if ECB_GCC_VERSION(4,3)
744 #define ecb_artificial ecb_attribute ((__artificial__))
745 #define ecb_hot ecb_attribute ((__hot__))
746 #define ecb_cold ecb_attribute ((__cold__))
747#else
748 #define ecb_artificial
749 #define ecb_hot
750 #define ecb_cold
751#endif
752
753/* put around conditional expressions if you are very sure that the */
754/* expression is mostly true or mostly false. note that these return */
755/* booleans, not the expression. */
173#define expect_false(expr) expect ((expr) != 0, 0) 756#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
174#define expect_true(expr) expect ((expr) != 0, 1) 757#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
758/* for compatibility to the rest of the world */
759#define ecb_likely(expr) ecb_expect_true (expr)
760#define ecb_unlikely(expr) ecb_expect_false (expr)
175 761
762/* count trailing zero bits and count # of one bits */
763#if ECB_GCC_VERSION(3,4)
764 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
765 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
766 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
767 #define ecb_ctz32(x) __builtin_ctz (x)
768 #define ecb_ctz64(x) __builtin_ctzll (x)
769 #define ecb_popcount32(x) __builtin_popcount (x)
770 /* no popcountll */
771#else
772 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
773 ecb_function_ int
774 ecb_ctz32 (uint32_t x)
775 {
776 int r = 0;
777
778 x &= ~x + 1; /* this isolates the lowest bit */
779
780#if ECB_branchless_on_i386
781 r += !!(x & 0xaaaaaaaa) << 0;
782 r += !!(x & 0xcccccccc) << 1;
783 r += !!(x & 0xf0f0f0f0) << 2;
784 r += !!(x & 0xff00ff00) << 3;
785 r += !!(x & 0xffff0000) << 4;
786#else
787 if (x & 0xaaaaaaaa) r += 1;
788 if (x & 0xcccccccc) r += 2;
789 if (x & 0xf0f0f0f0) r += 4;
790 if (x & 0xff00ff00) r += 8;
791 if (x & 0xffff0000) r += 16;
792#endif
793
794 return r;
795 }
796
797 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
798 ecb_function_ int
799 ecb_ctz64 (uint64_t x)
800 {
801 int shift = x & 0xffffffffU ? 0 : 32;
802 return ecb_ctz32 (x >> shift) + shift;
803 }
804
805 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
806 ecb_function_ int
807 ecb_popcount32 (uint32_t x)
808 {
809 x -= (x >> 1) & 0x55555555;
810 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
811 x = ((x >> 4) + x) & 0x0f0f0f0f;
812 x *= 0x01010101;
813
814 return x >> 24;
815 }
816
817 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
818 ecb_function_ int ecb_ld32 (uint32_t x)
819 {
820 int r = 0;
821
822 if (x >> 16) { x >>= 16; r += 16; }
823 if (x >> 8) { x >>= 8; r += 8; }
824 if (x >> 4) { x >>= 4; r += 4; }
825 if (x >> 2) { x >>= 2; r += 2; }
826 if (x >> 1) { r += 1; }
827
828 return r;
829 }
830
831 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
832 ecb_function_ int ecb_ld64 (uint64_t x)
833 {
834 int r = 0;
835
836 if (x >> 32) { x >>= 32; r += 32; }
837
838 return r + ecb_ld32 (x);
839 }
840#endif
841
842ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
843ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
844ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
845ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
846
847ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
848ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
849{
850 return ( (x * 0x0802U & 0x22110U)
851 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
852}
853
854ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
855ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
856{
857 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
858 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
859 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
860 x = ( x >> 8 ) | ( x << 8);
861
862 return x;
863}
864
865ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
866ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
867{
868 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
869 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
870 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
871 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
872 x = ( x >> 16 ) | ( x << 16);
873
874 return x;
875}
876
877/* popcount64 is only available on 64 bit cpus as gcc builtin */
878/* so for this version we are lazy */
879ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
880ecb_function_ int
881ecb_popcount64 (uint64_t x)
882{
883 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
884}
885
886ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
887ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
888ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
889ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
890ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
891ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
892ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
893ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
894
895ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
896ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
897ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
898ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
899ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
900ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
901ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
902ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
903
904#if ECB_GCC_VERSION(4,3)
905 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
906 #define ecb_bswap32(x) __builtin_bswap32 (x)
907 #define ecb_bswap64(x) __builtin_bswap64 (x)
908#else
909 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
910 ecb_function_ uint16_t
911 ecb_bswap16 (uint16_t x)
912 {
913 return ecb_rotl16 (x, 8);
914 }
915
916 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
917 ecb_function_ uint32_t
918 ecb_bswap32 (uint32_t x)
919 {
920 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
921 }
922
923 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
924 ecb_function_ uint64_t
925 ecb_bswap64 (uint64_t x)
926 {
927 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
928 }
929#endif
930
931#if ECB_GCC_VERSION(4,5)
932 #define ecb_unreachable() __builtin_unreachable ()
933#else
934 /* this seems to work fine, but gcc always emits a warning for it :/ */
935 ecb_inline void ecb_unreachable (void) ecb_noreturn;
936 ecb_inline void ecb_unreachable (void) { }
937#endif
938
939/* try to tell the compiler that some condition is definitely true */
940#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
941
942ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
943ecb_inline unsigned char
944ecb_byteorder_helper (void)
945{
946 const uint32_t u = 0x11223344;
947 return *(unsigned char *)&u;
948}
949
950ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
951ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
952ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
953ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
954
955#if ECB_GCC_VERSION(3,0) || ECB_C99
956 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
957#else
958 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
959#endif
960
961#if __cplusplus
962 template<typename T>
963 static inline T ecb_div_rd (T val, T div)
964 {
965 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
966 }
967 template<typename T>
968 static inline T ecb_div_ru (T val, T div)
969 {
970 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
971 }
972#else
973 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
974 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
975#endif
976
977#if ecb_cplusplus_does_not_suck
978 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
979 template<typename T, int N>
980 static inline int ecb_array_length (const T (&arr)[N])
981 {
982 return N;
983 }
984#else
985 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
986#endif
987
988#endif
989
990/* ECB.H END */
991
992#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
993/* if your architecture doesn't need memory fences, e.g. because it is
994 * single-cpu/core, or if you use libev in a project that doesn't use libev
995 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
996 * libev, in which cases the memory fences become nops.
997 * alternatively, you can remove this #error and link against libpthread,
998 * which will then provide the memory fences.
999 */
1000# error "memory fences not defined for your architecture, please report"
1001#endif
1002
1003#ifndef ECB_MEMORY_FENCE
1004# define ECB_MEMORY_FENCE do { } while (0)
1005# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1006# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1007#endif
1008
1009#define expect_false(cond) ecb_expect_false (cond)
1010#define expect_true(cond) ecb_expect_true (cond)
1011#define noinline ecb_noinline
1012
1013#define inline_size ecb_inline
1014
1015#if EV_FEATURE_CODE
1016# define inline_speed ecb_inline
1017#else
1018# define inline_speed static noinline
1019#endif
1020
176#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1021#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1022
1023#if EV_MINPRI == EV_MAXPRI
1024# define ABSPRI(w) (((W)w), 0)
1025#else
177#define ABSPRI(w) ((w)->priority - EV_MINPRI) 1026# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1027#endif
178 1028
179#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ 1029#define EMPTY /* required for microsofts broken pseudo-c compiler */
180#define EMPTY2(a,b) /* used to suppress some warnings */ 1030#define EMPTY2(a,b) /* used to suppress some warnings */
181 1031
182typedef struct ev_watcher *W; 1032typedef ev_watcher *W;
183typedef struct ev_watcher_list *WL; 1033typedef ev_watcher_list *WL;
184typedef struct ev_watcher_time *WT; 1034typedef ev_watcher_time *WT;
185 1035
1036#define ev_active(w) ((W)(w))->active
1037#define ev_at(w) ((WT)(w))->at
1038
1039#if EV_USE_REALTIME
1040/* sig_atomic_t is used to avoid per-thread variables or locking but still */
1041/* giving it a reasonably high chance of working on typical architectures */
1042static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1043#endif
1044
1045#if EV_USE_MONOTONIC
186static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1046static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1047#endif
1048
1049#ifndef EV_FD_TO_WIN32_HANDLE
1050# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1051#endif
1052#ifndef EV_WIN32_HANDLE_TO_FD
1053# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1054#endif
1055#ifndef EV_WIN32_CLOSE_FD
1056# define EV_WIN32_CLOSE_FD(fd) close (fd)
1057#endif
187 1058
188#ifdef _WIN32 1059#ifdef _WIN32
189# include "ev_win32.c" 1060# include "ev_win32.c"
190#endif 1061#endif
191 1062
192/*****************************************************************************/ 1063/*****************************************************************************/
193 1064
1065/* define a suitable floor function (only used by periodics atm) */
1066
1067#if EV_USE_FLOOR
1068# include <math.h>
1069# define ev_floor(v) floor (v)
1070#else
1071
1072#include <float.h>
1073
1074/* a floor() replacement function, should be independent of ev_tstamp type */
1075static ev_tstamp noinline
1076ev_floor (ev_tstamp v)
1077{
1078 /* the choice of shift factor is not terribly important */
1079#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1080 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1081#else
1082 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1083#endif
1084
1085 /* argument too large for an unsigned long? */
1086 if (expect_false (v >= shift))
1087 {
1088 ev_tstamp f;
1089
1090 if (v == v - 1.)
1091 return v; /* very large number */
1092
1093 f = shift * ev_floor (v * (1. / shift));
1094 return f + ev_floor (v - f);
1095 }
1096
1097 /* special treatment for negative args? */
1098 if (expect_false (v < 0.))
1099 {
1100 ev_tstamp f = -ev_floor (-v);
1101
1102 return f - (f == v ? 0 : 1);
1103 }
1104
1105 /* fits into an unsigned long */
1106 return (unsigned long)v;
1107}
1108
1109#endif
1110
1111/*****************************************************************************/
1112
1113#ifdef __linux
1114# include <sys/utsname.h>
1115#endif
1116
1117static unsigned int noinline ecb_cold
1118ev_linux_version (void)
1119{
1120#ifdef __linux
1121 unsigned int v = 0;
1122 struct utsname buf;
1123 int i;
1124 char *p = buf.release;
1125
1126 if (uname (&buf))
1127 return 0;
1128
1129 for (i = 3+1; --i; )
1130 {
1131 unsigned int c = 0;
1132
1133 for (;;)
1134 {
1135 if (*p >= '0' && *p <= '9')
1136 c = c * 10 + *p++ - '0';
1137 else
1138 {
1139 p += *p == '.';
1140 break;
1141 }
1142 }
1143
1144 v = (v << 8) | c;
1145 }
1146
1147 return v;
1148#else
1149 return 0;
1150#endif
1151}
1152
1153/*****************************************************************************/
1154
1155#if EV_AVOID_STDIO
1156static void noinline ecb_cold
1157ev_printerr (const char *msg)
1158{
1159 write (STDERR_FILENO, msg, strlen (msg));
1160}
1161#endif
1162
194static void (*syserr_cb)(const char *msg); 1163static void (*syserr_cb)(const char *msg) EV_THROW;
195 1164
1165void ecb_cold
196void ev_set_syserr_cb (void (*cb)(const char *msg)) 1166ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
197{ 1167{
198 syserr_cb = cb; 1168 syserr_cb = cb;
199} 1169}
200 1170
201static void 1171static void noinline ecb_cold
202syserr (const char *msg) 1172ev_syserr (const char *msg)
203{ 1173{
204 if (!msg) 1174 if (!msg)
205 msg = "(libev) system error"; 1175 msg = "(libev) system error";
206 1176
207 if (syserr_cb) 1177 if (syserr_cb)
208 syserr_cb (msg); 1178 syserr_cb (msg);
209 else 1179 else
210 { 1180 {
1181#if EV_AVOID_STDIO
1182 ev_printerr (msg);
1183 ev_printerr (": ");
1184 ev_printerr (strerror (errno));
1185 ev_printerr ("\n");
1186#else
211 perror (msg); 1187 perror (msg);
1188#endif
212 abort (); 1189 abort ();
213 } 1190 }
214} 1191}
215 1192
1193static void *
1194ev_realloc_emul (void *ptr, long size) EV_THROW
1195{
1196#if __GLIBC__
1197 return realloc (ptr, size);
1198#else
1199 /* some systems, notably openbsd and darwin, fail to properly
1200 * implement realloc (x, 0) (as required by both ansi c-89 and
1201 * the single unix specification, so work around them here.
1202 */
1203
1204 if (size)
1205 return realloc (ptr, size);
1206
1207 free (ptr);
1208 return 0;
1209#endif
1210}
1211
216static void *(*alloc)(void *ptr, long size); 1212static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
217 1213
1214void ecb_cold
218void ev_set_allocator (void *(*cb)(void *ptr, long size)) 1215ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
219{ 1216{
220 alloc = cb; 1217 alloc = cb;
221} 1218}
222 1219
223static void * 1220inline_speed void *
224ev_realloc (void *ptr, long size) 1221ev_realloc (void *ptr, long size)
225{ 1222{
226 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1223 ptr = alloc (ptr, size);
227 1224
228 if (!ptr && size) 1225 if (!ptr && size)
229 { 1226 {
1227#if EV_AVOID_STDIO
1228 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1229#else
230 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1230 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1231#endif
231 abort (); 1232 abort ();
232 } 1233 }
233 1234
234 return ptr; 1235 return ptr;
235} 1236}
… …
237#define ev_malloc(size) ev_realloc (0, (size)) 1238#define ev_malloc(size) ev_realloc (0, (size))
238#define ev_free(ptr) ev_realloc ((ptr), 0) 1239#define ev_free(ptr) ev_realloc ((ptr), 0)
239 1240
240/*****************************************************************************/ 1241/*****************************************************************************/
241 1242
1243/* set in reify when reification needed */
1244#define EV_ANFD_REIFY 1
1245
1246/* file descriptor info structure */
242typedef struct 1247typedef struct
243{ 1248{
244 WL head; 1249 WL head;
245 unsigned char events; 1250 unsigned char events; /* the events watched for */
1251 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1252 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
246 unsigned char reify; 1253 unsigned char unused;
1254#if EV_USE_EPOLL
1255 unsigned int egen; /* generation counter to counter epoll bugs */
1256#endif
247#if EV_SELECT_IS_WINSOCKET 1257#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
248 SOCKET handle; 1258 SOCKET handle;
249#endif 1259#endif
1260#if EV_USE_IOCP
1261 OVERLAPPED or, ow;
1262#endif
250} ANFD; 1263} ANFD;
251 1264
1265/* stores the pending event set for a given watcher */
252typedef struct 1266typedef struct
253{ 1267{
254 W w; 1268 W w;
255 int events; 1269 int events; /* the pending event set for the given watcher */
256} ANPENDING; 1270} ANPENDING;
1271
1272#if EV_USE_INOTIFY
1273/* hash table entry per inotify-id */
1274typedef struct
1275{
1276 WL head;
1277} ANFS;
1278#endif
1279
1280/* Heap Entry */
1281#if EV_HEAP_CACHE_AT
1282 /* a heap element */
1283 typedef struct {
1284 ev_tstamp at;
1285 WT w;
1286 } ANHE;
1287
1288 #define ANHE_w(he) (he).w /* access watcher, read-write */
1289 #define ANHE_at(he) (he).at /* access cached at, read-only */
1290 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1291#else
1292 /* a heap element */
1293 typedef WT ANHE;
1294
1295 #define ANHE_w(he) (he)
1296 #define ANHE_at(he) (he)->at
1297 #define ANHE_at_cache(he)
1298#endif
257 1299
258#if EV_MULTIPLICITY 1300#if EV_MULTIPLICITY
259 1301
260 struct ev_loop 1302 struct ev_loop
261 { 1303 {
… …
266 #undef VAR 1308 #undef VAR
267 }; 1309 };
268 #include "ev_wrap.h" 1310 #include "ev_wrap.h"
269 1311
270 static struct ev_loop default_loop_struct; 1312 static struct ev_loop default_loop_struct;
271 struct ev_loop *ev_default_loop_ptr; 1313 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
272 1314
273#else 1315#else
274 1316
275 ev_tstamp ev_rt_now; 1317 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
276 #define VAR(name,decl) static decl; 1318 #define VAR(name,decl) static decl;
277 #include "ev_vars.h" 1319 #include "ev_vars.h"
278 #undef VAR 1320 #undef VAR
279 1321
280 static int ev_default_loop_ptr; 1322 static int ev_default_loop_ptr;
281 1323
282#endif 1324#endif
283 1325
1326#if EV_FEATURE_API
1327# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1328# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1329# define EV_INVOKE_PENDING invoke_cb (EV_A)
1330#else
1331# define EV_RELEASE_CB (void)0
1332# define EV_ACQUIRE_CB (void)0
1333# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1334#endif
1335
1336#define EVBREAK_RECURSE 0x80
1337
284/*****************************************************************************/ 1338/*****************************************************************************/
285 1339
1340#ifndef EV_HAVE_EV_TIME
286ev_tstamp 1341ev_tstamp
287ev_time (void) 1342ev_time (void) EV_THROW
288{ 1343{
289#if EV_USE_REALTIME 1344#if EV_USE_REALTIME
1345 if (expect_true (have_realtime))
1346 {
290 struct timespec ts; 1347 struct timespec ts;
291 clock_gettime (CLOCK_REALTIME, &ts); 1348 clock_gettime (CLOCK_REALTIME, &ts);
292 return ts.tv_sec + ts.tv_nsec * 1e-9; 1349 return ts.tv_sec + ts.tv_nsec * 1e-9;
293#else 1350 }
1351#endif
1352
294 struct timeval tv; 1353 struct timeval tv;
295 gettimeofday (&tv, 0); 1354 gettimeofday (&tv, 0);
296 return tv.tv_sec + tv.tv_usec * 1e-6; 1355 return tv.tv_sec + tv.tv_usec * 1e-6;
297#endif
298} 1356}
1357#endif
299 1358
300inline ev_tstamp 1359inline_size ev_tstamp
301get_clock (void) 1360get_clock (void)
302{ 1361{
303#if EV_USE_MONOTONIC 1362#if EV_USE_MONOTONIC
304 if (expect_true (have_monotonic)) 1363 if (expect_true (have_monotonic))
305 { 1364 {
… …
312 return ev_time (); 1371 return ev_time ();
313} 1372}
314 1373
315#if EV_MULTIPLICITY 1374#if EV_MULTIPLICITY
316ev_tstamp 1375ev_tstamp
317ev_now (EV_P) 1376ev_now (EV_P) EV_THROW
318{ 1377{
319 return ev_rt_now; 1378 return ev_rt_now;
320} 1379}
321#endif 1380#endif
322 1381
323#define array_roundsize(type,n) (((n) | 4) & ~3) 1382void
1383ev_sleep (ev_tstamp delay) EV_THROW
1384{
1385 if (delay > 0.)
1386 {
1387#if EV_USE_NANOSLEEP
1388 struct timespec ts;
1389
1390 EV_TS_SET (ts, delay);
1391 nanosleep (&ts, 0);
1392#elif defined _WIN32
1393 Sleep ((unsigned long)(delay * 1e3));
1394#else
1395 struct timeval tv;
1396
1397 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1398 /* something not guaranteed by newer posix versions, but guaranteed */
1399 /* by older ones */
1400 EV_TV_SET (tv, delay);
1401 select (0, 0, 0, 0, &tv);
1402#endif
1403 }
1404}
1405
1406/*****************************************************************************/
1407
1408#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1409
1410/* find a suitable new size for the given array, */
1411/* hopefully by rounding to a nice-to-malloc size */
1412inline_size int
1413array_nextsize (int elem, int cur, int cnt)
1414{
1415 int ncur = cur + 1;
1416
1417 do
1418 ncur <<= 1;
1419 while (cnt > ncur);
1420
1421 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
1422 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
1423 {
1424 ncur *= elem;
1425 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
1426 ncur = ncur - sizeof (void *) * 4;
1427 ncur /= elem;
1428 }
1429
1430 return ncur;
1431}
1432
1433static void * noinline ecb_cold
1434array_realloc (int elem, void *base, int *cur, int cnt)
1435{
1436 *cur = array_nextsize (elem, *cur, cnt);
1437 return ev_realloc (base, elem * *cur);
1438}
1439
1440#define array_init_zero(base,count) \
1441 memset ((void *)(base), 0, sizeof (*(base)) * (count))
324 1442
325#define array_needsize(type,base,cur,cnt,init) \ 1443#define array_needsize(type,base,cur,cnt,init) \
326 if (expect_false ((cnt) > cur)) \ 1444 if (expect_false ((cnt) > (cur))) \
327 { \ 1445 { \
328 int newcnt = cur; \ 1446 int ecb_unused ocur_ = (cur); \
329 do \ 1447 (base) = (type *)array_realloc \
330 { \ 1448 (sizeof (type), (base), &(cur), (cnt)); \
331 newcnt = array_roundsize (type, newcnt << 1); \ 1449 init ((base) + (ocur_), (cur) - ocur_); \
332 } \
333 while ((cnt) > newcnt); \
334 \
335 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
336 init (base + cur, newcnt - cur); \
337 cur = newcnt; \
338 } 1450 }
339 1451
1452#if 0
340#define array_slim(type,stem) \ 1453#define array_slim(type,stem) \
341 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 1454 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
342 { \ 1455 { \
343 stem ## max = array_roundsize (stem ## cnt >> 1); \ 1456 stem ## max = array_roundsize (stem ## cnt >> 1); \
344 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 1457 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
345 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1458 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
346 } 1459 }
1460#endif
347 1461
348#define array_free(stem, idx) \ 1462#define array_free(stem, idx) \
349 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1463 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
350 1464
351/*****************************************************************************/ 1465/*****************************************************************************/
352 1466
353static void 1467/* dummy callback for pending events */
354anfds_init (ANFD *base, int count) 1468static void noinline
1469pendingcb (EV_P_ ev_prepare *w, int revents)
355{ 1470{
356 while (count--)
357 {
358 base->head = 0;
359 base->events = EV_NONE;
360 base->reify = 0;
361
362 ++base;
363 }
364} 1471}
365 1472
366void 1473void noinline
367ev_feed_event (EV_P_ void *w, int revents) 1474ev_feed_event (EV_P_ void *w, int revents) EV_THROW
368{ 1475{
369 W w_ = (W)w; 1476 W w_ = (W)w;
1477 int pri = ABSPRI (w_);
370 1478
371 if (expect_false (w_->pending)) 1479 if (expect_false (w_->pending))
1480 pendings [pri][w_->pending - 1].events |= revents;
1481 else
372 { 1482 {
1483 w_->pending = ++pendingcnt [pri];
1484 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1485 pendings [pri][w_->pending - 1].w = w_;
373 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 1486 pendings [pri][w_->pending - 1].events = revents;
374 return;
375 } 1487 }
376 1488
377 w_->pending = ++pendingcnt [ABSPRI (w_)]; 1489 pendingpri = NUMPRI - 1;
378 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
379 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
380 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
381} 1490}
382 1491
383static void 1492inline_speed void
1493feed_reverse (EV_P_ W w)
1494{
1495 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1496 rfeeds [rfeedcnt++] = w;
1497}
1498
1499inline_size void
1500feed_reverse_done (EV_P_ int revents)
1501{
1502 do
1503 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1504 while (rfeedcnt);
1505}
1506
1507inline_speed void
384queue_events (EV_P_ W *events, int eventcnt, int type) 1508queue_events (EV_P_ W *events, int eventcnt, int type)
385{ 1509{
386 int i; 1510 int i;
387 1511
388 for (i = 0; i < eventcnt; ++i) 1512 for (i = 0; i < eventcnt; ++i)
389 ev_feed_event (EV_A_ events [i], type); 1513 ev_feed_event (EV_A_ events [i], type);
390} 1514}
391 1515
1516/*****************************************************************************/
1517
392inline void 1518inline_speed void
393fd_event (EV_P_ int fd, int revents) 1519fd_event_nocheck (EV_P_ int fd, int revents)
394{ 1520{
395 ANFD *anfd = anfds + fd; 1521 ANFD *anfd = anfds + fd;
396 struct ev_io *w; 1522 ev_io *w;
397 1523
398 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 1524 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
399 { 1525 {
400 int ev = w->events & revents; 1526 int ev = w->events & revents;
401 1527
402 if (ev) 1528 if (ev)
403 ev_feed_event (EV_A_ (W)w, ev); 1529 ev_feed_event (EV_A_ (W)w, ev);
404 } 1530 }
405} 1531}
406 1532
1533/* do not submit kernel events for fds that have reify set */
1534/* because that means they changed while we were polling for new events */
1535inline_speed void
1536fd_event (EV_P_ int fd, int revents)
1537{
1538 ANFD *anfd = anfds + fd;
1539
1540 if (expect_true (!anfd->reify))
1541 fd_event_nocheck (EV_A_ fd, revents);
1542}
1543
407void 1544void
408ev_feed_fd_event (EV_P_ int fd, int revents) 1545ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
409{ 1546{
1547 if (fd >= 0 && fd < anfdmax)
410 fd_event (EV_A_ fd, revents); 1548 fd_event_nocheck (EV_A_ fd, revents);
411} 1549}
412 1550
413/*****************************************************************************/ 1551/* make sure the external fd watch events are in-sync */
414 1552/* with the kernel/libev internal state */
415inline void 1553inline_size void
416fd_reify (EV_P) 1554fd_reify (EV_P)
417{ 1555{
418 int i; 1556 int i;
419 1557
1558#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
420 for (i = 0; i < fdchangecnt; ++i) 1559 for (i = 0; i < fdchangecnt; ++i)
421 { 1560 {
422 int fd = fdchanges [i]; 1561 int fd = fdchanges [i];
423 ANFD *anfd = anfds + fd; 1562 ANFD *anfd = anfds + fd;
424 struct ev_io *w;
425 1563
426 int events = 0; 1564 if (anfd->reify & EV__IOFDSET && anfd->head)
427
428 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
429 events |= w->events;
430
431#if EV_SELECT_IS_WINSOCKET
432 if (events)
433 { 1565 {
1566 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1567
1568 if (handle != anfd->handle)
1569 {
434 unsigned long argp; 1570 unsigned long arg;
435 anfd->handle = _get_osfhandle (fd); 1571
436 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 1572 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1573
1574 /* handle changed, but fd didn't - we need to do it in two steps */
1575 backend_modify (EV_A_ fd, anfd->events, 0);
1576 anfd->events = 0;
1577 anfd->handle = handle;
1578 }
437 } 1579 }
1580 }
438#endif 1581#endif
439 1582
1583 for (i = 0; i < fdchangecnt; ++i)
1584 {
1585 int fd = fdchanges [i];
1586 ANFD *anfd = anfds + fd;
1587 ev_io *w;
1588
1589 unsigned char o_events = anfd->events;
1590 unsigned char o_reify = anfd->reify;
1591
440 anfd->reify = 0; 1592 anfd->reify = 0;
441 1593
442 method_modify (EV_A_ fd, anfd->events, events); 1594 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1595 {
443 anfd->events = events; 1596 anfd->events = 0;
1597
1598 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1599 anfd->events |= (unsigned char)w->events;
1600
1601 if (o_events != anfd->events)
1602 o_reify = EV__IOFDSET; /* actually |= */
1603 }
1604
1605 if (o_reify & EV__IOFDSET)
1606 backend_modify (EV_A_ fd, o_events, anfd->events);
444 } 1607 }
445 1608
446 fdchangecnt = 0; 1609 fdchangecnt = 0;
447} 1610}
448 1611
449static void 1612/* something about the given fd changed */
1613inline_size void
450fd_change (EV_P_ int fd) 1614fd_change (EV_P_ int fd, int flags)
451{ 1615{
452 if (expect_false (anfds [fd].reify)) 1616 unsigned char reify = anfds [fd].reify;
453 return;
454
455 anfds [fd].reify = 1; 1617 anfds [fd].reify |= flags;
456 1618
1619 if (expect_true (!reify))
1620 {
457 ++fdchangecnt; 1621 ++fdchangecnt;
458 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1622 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
459 fdchanges [fdchangecnt - 1] = fd; 1623 fdchanges [fdchangecnt - 1] = fd;
1624 }
460} 1625}
461 1626
462static void 1627/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1628inline_speed void ecb_cold
463fd_kill (EV_P_ int fd) 1629fd_kill (EV_P_ int fd)
464{ 1630{
465 struct ev_io *w; 1631 ev_io *w;
466 1632
467 while ((w = (struct ev_io *)anfds [fd].head)) 1633 while ((w = (ev_io *)anfds [fd].head))
468 { 1634 {
469 ev_io_stop (EV_A_ w); 1635 ev_io_stop (EV_A_ w);
470 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1636 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
471 } 1637 }
472} 1638}
473 1639
474inline int 1640/* check whether the given fd is actually valid, for error recovery */
1641inline_size int ecb_cold
475fd_valid (int fd) 1642fd_valid (int fd)
476{ 1643{
477#ifdef _WIN32 1644#ifdef _WIN32
478 return _get_osfhandle (fd) != -1; 1645 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
479#else 1646#else
480 return fcntl (fd, F_GETFD) != -1; 1647 return fcntl (fd, F_GETFD) != -1;
481#endif 1648#endif
482} 1649}
483 1650
484/* called on EBADF to verify fds */ 1651/* called on EBADF to verify fds */
485static void 1652static void noinline ecb_cold
486fd_ebadf (EV_P) 1653fd_ebadf (EV_P)
487{ 1654{
488 int fd; 1655 int fd;
489 1656
490 for (fd = 0; fd < anfdmax; ++fd) 1657 for (fd = 0; fd < anfdmax; ++fd)
491 if (anfds [fd].events) 1658 if (anfds [fd].events)
492 if (!fd_valid (fd) == -1 && errno == EBADF) 1659 if (!fd_valid (fd) && errno == EBADF)
493 fd_kill (EV_A_ fd); 1660 fd_kill (EV_A_ fd);
494} 1661}
495 1662
496/* called on ENOMEM in select/poll to kill some fds and retry */ 1663/* called on ENOMEM in select/poll to kill some fds and retry */
497static void 1664static void noinline ecb_cold
498fd_enomem (EV_P) 1665fd_enomem (EV_P)
499{ 1666{
500 int fd; 1667 int fd;
501 1668
502 for (fd = anfdmax; fd--; ) 1669 for (fd = anfdmax; fd--; )
503 if (anfds [fd].events) 1670 if (anfds [fd].events)
504 { 1671 {
505 fd_kill (EV_A_ fd); 1672 fd_kill (EV_A_ fd);
506 return; 1673 break;
507 } 1674 }
508} 1675}
509 1676
510/* usually called after fork if method needs to re-arm all fds from scratch */ 1677/* usually called after fork if backend needs to re-arm all fds from scratch */
511static void 1678static void noinline
512fd_rearm_all (EV_P) 1679fd_rearm_all (EV_P)
513{ 1680{
514 int fd; 1681 int fd;
515 1682
516 /* this should be highly optimised to not do anything but set a flag */
517 for (fd = 0; fd < anfdmax; ++fd) 1683 for (fd = 0; fd < anfdmax; ++fd)
518 if (anfds [fd].events) 1684 if (anfds [fd].events)
519 { 1685 {
520 anfds [fd].events = 0; 1686 anfds [fd].events = 0;
521 fd_change (EV_A_ fd); 1687 anfds [fd].emask = 0;
1688 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
522 } 1689 }
523} 1690}
524 1691
525/*****************************************************************************/ 1692/* used to prepare libev internal fd's */
526 1693/* this is not fork-safe */
527static void
528upheap (WT *heap, int k)
529{
530 WT w = heap [k];
531
532 while (k && heap [k >> 1]->at > w->at)
533 {
534 heap [k] = heap [k >> 1];
535 ((W)heap [k])->active = k + 1;
536 k >>= 1;
537 }
538
539 heap [k] = w;
540 ((W)heap [k])->active = k + 1;
541
542}
543
544static void
545downheap (WT *heap, int N, int k)
546{
547 WT w = heap [k];
548
549 while (k < (N >> 1))
550 {
551 int j = k << 1;
552
553 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
554 ++j;
555
556 if (w->at <= heap [j]->at)
557 break;
558
559 heap [k] = heap [j];
560 ((W)heap [k])->active = k + 1;
561 k = j;
562 }
563
564 heap [k] = w;
565 ((W)heap [k])->active = k + 1;
566}
567
568inline void 1694inline_speed void
569adjustheap (WT *heap, int N, int k)
570{
571 upheap (heap, k);
572 downheap (heap, N, k);
573}
574
575/*****************************************************************************/
576
577typedef struct
578{
579 WL head;
580 sig_atomic_t volatile gotsig;
581} ANSIG;
582
583static ANSIG *signals;
584static int signalmax;
585
586static int sigpipe [2];
587static sig_atomic_t volatile gotsig;
588static struct ev_io sigev;
589
590static void
591signals_init (ANSIG *base, int count)
592{
593 while (count--)
594 {
595 base->head = 0;
596 base->gotsig = 0;
597
598 ++base;
599 }
600}
601
602static void
603sighandler (int signum)
604{
605#if _WIN32
606 signal (signum, sighandler);
607#endif
608
609 signals [signum - 1].gotsig = 1;
610
611 if (!gotsig)
612 {
613 int old_errno = errno;
614 gotsig = 1;
615 write (sigpipe [1], &signum, 1);
616 errno = old_errno;
617 }
618}
619
620void
621ev_feed_signal_event (EV_P_ int signum)
622{
623 WL w;
624
625#if EV_MULTIPLICITY
626 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
627#endif
628
629 --signum;
630
631 if (signum < 0 || signum >= signalmax)
632 return;
633
634 signals [signum].gotsig = 0;
635
636 for (w = signals [signum].head; w; w = w->next)
637 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
638}
639
640static void
641sigcb (EV_P_ struct ev_io *iow, int revents)
642{
643 int signum;
644
645 read (sigpipe [0], &revents, 1);
646 gotsig = 0;
647
648 for (signum = signalmax; signum--; )
649 if (signals [signum].gotsig)
650 ev_feed_signal_event (EV_A_ signum + 1);
651}
652
653static void
654fd_intern (int fd) 1695fd_intern (int fd)
655{ 1696{
656#ifdef _WIN32 1697#ifdef _WIN32
657 int arg = 1; 1698 unsigned long arg = 1;
658 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1699 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
659#else 1700#else
660 fcntl (fd, F_SETFD, FD_CLOEXEC); 1701 fcntl (fd, F_SETFD, FD_CLOEXEC);
661 fcntl (fd, F_SETFL, O_NONBLOCK); 1702 fcntl (fd, F_SETFL, O_NONBLOCK);
662#endif 1703#endif
663} 1704}
664 1705
1706/*****************************************************************************/
1707
1708/*
1709 * the heap functions want a real array index. array index 0 is guaranteed to not
1710 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1711 * the branching factor of the d-tree.
1712 */
1713
1714/*
1715 * at the moment we allow libev the luxury of two heaps,
1716 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1717 * which is more cache-efficient.
1718 * the difference is about 5% with 50000+ watchers.
1719 */
1720#if EV_USE_4HEAP
1721
1722#define DHEAP 4
1723#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1724#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1725#define UPHEAP_DONE(p,k) ((p) == (k))
1726
1727/* away from the root */
1728inline_speed void
1729downheap (ANHE *heap, int N, int k)
1730{
1731 ANHE he = heap [k];
1732 ANHE *E = heap + N + HEAP0;
1733
1734 for (;;)
1735 {
1736 ev_tstamp minat;
1737 ANHE *minpos;
1738 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1739
1740 /* find minimum child */
1741 if (expect_true (pos + DHEAP - 1 < E))
1742 {
1743 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1744 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1745 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1746 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1747 }
1748 else if (pos < E)
1749 {
1750 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1751 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1752 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1753 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1754 }
1755 else
1756 break;
1757
1758 if (ANHE_at (he) <= minat)
1759 break;
1760
1761 heap [k] = *minpos;
1762 ev_active (ANHE_w (*minpos)) = k;
1763
1764 k = minpos - heap;
1765 }
1766
1767 heap [k] = he;
1768 ev_active (ANHE_w (he)) = k;
1769}
1770
1771#else /* 4HEAP */
1772
1773#define HEAP0 1
1774#define HPARENT(k) ((k) >> 1)
1775#define UPHEAP_DONE(p,k) (!(p))
1776
1777/* away from the root */
1778inline_speed void
1779downheap (ANHE *heap, int N, int k)
1780{
1781 ANHE he = heap [k];
1782
1783 for (;;)
1784 {
1785 int c = k << 1;
1786
1787 if (c >= N + HEAP0)
1788 break;
1789
1790 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1791 ? 1 : 0;
1792
1793 if (ANHE_at (he) <= ANHE_at (heap [c]))
1794 break;
1795
1796 heap [k] = heap [c];
1797 ev_active (ANHE_w (heap [k])) = k;
1798
1799 k = c;
1800 }
1801
1802 heap [k] = he;
1803 ev_active (ANHE_w (he)) = k;
1804}
1805#endif
1806
1807/* towards the root */
1808inline_speed void
1809upheap (ANHE *heap, int k)
1810{
1811 ANHE he = heap [k];
1812
1813 for (;;)
1814 {
1815 int p = HPARENT (k);
1816
1817 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1818 break;
1819
1820 heap [k] = heap [p];
1821 ev_active (ANHE_w (heap [k])) = k;
1822 k = p;
1823 }
1824
1825 heap [k] = he;
1826 ev_active (ANHE_w (he)) = k;
1827}
1828
1829/* move an element suitably so it is in a correct place */
1830inline_size void
1831adjustheap (ANHE *heap, int N, int k)
1832{
1833 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1834 upheap (heap, k);
1835 else
1836 downheap (heap, N, k);
1837}
1838
1839/* rebuild the heap: this function is used only once and executed rarely */
1840inline_size void
1841reheap (ANHE *heap, int N)
1842{
1843 int i;
1844
1845 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1846 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1847 for (i = 0; i < N; ++i)
1848 upheap (heap, i + HEAP0);
1849}
1850
1851/*****************************************************************************/
1852
1853/* associate signal watchers to a signal signal */
1854typedef struct
1855{
1856 EV_ATOMIC_T pending;
1857#if EV_MULTIPLICITY
1858 EV_P;
1859#endif
1860 WL head;
1861} ANSIG;
1862
1863static ANSIG signals [EV_NSIG - 1];
1864
1865/*****************************************************************************/
1866
1867#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1868
1869static void noinline ecb_cold
1870evpipe_init (EV_P)
1871{
1872 if (!ev_is_active (&pipe_w))
1873 {
1874# if EV_USE_EVENTFD
1875 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1876 if (evfd < 0 && errno == EINVAL)
1877 evfd = eventfd (0, 0);
1878
1879 if (evfd >= 0)
1880 {
1881 evpipe [0] = -1;
1882 fd_intern (evfd); /* doing it twice doesn't hurt */
1883 ev_io_set (&pipe_w, evfd, EV_READ);
1884 }
1885 else
1886# endif
1887 {
1888 while (pipe (evpipe))
1889 ev_syserr ("(libev) error creating signal/async pipe");
1890
1891 fd_intern (evpipe [0]);
1892 fd_intern (evpipe [1]);
1893 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1894 }
1895
1896 ev_io_start (EV_A_ &pipe_w);
1897 ev_unref (EV_A); /* watcher should not keep loop alive */
1898 }
1899}
1900
1901inline_speed void
1902evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1903{
1904 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1905
1906 if (expect_true (*flag))
1907 return;
1908
1909 *flag = 1;
1910 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1911
1912 pipe_write_skipped = 1;
1913
1914 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1915
1916 if (pipe_write_wanted)
1917 {
1918 int old_errno;
1919
1920 pipe_write_skipped = 0;
1921 ECB_MEMORY_FENCE_RELEASE;
1922
1923 old_errno = errno; /* save errno because write will clobber it */
1924
1925#if EV_USE_EVENTFD
1926 if (evfd >= 0)
1927 {
1928 uint64_t counter = 1;
1929 write (evfd, &counter, sizeof (uint64_t));
1930 }
1931 else
1932#endif
1933 {
1934#ifdef _WIN32
1935 WSABUF buf;
1936 DWORD sent;
1937 buf.buf = &buf;
1938 buf.len = 1;
1939 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
1940#else
1941 write (evpipe [1], &(evpipe [1]), 1);
1942#endif
1943 }
1944
1945 errno = old_errno;
1946 }
1947}
1948
1949/* called whenever the libev signal pipe */
1950/* got some events (signal, async) */
665static void 1951static void
666siginit (EV_P) 1952pipecb (EV_P_ ev_io *iow, int revents)
667{ 1953{
668 fd_intern (sigpipe [0]); 1954 int i;
669 fd_intern (sigpipe [1]);
670 1955
671 ev_io_set (&sigev, sigpipe [0], EV_READ); 1956 if (revents & EV_READ)
672 ev_io_start (EV_A_ &sigev); 1957 {
673 ev_unref (EV_A); /* child watcher should not keep loop alive */ 1958#if EV_USE_EVENTFD
1959 if (evfd >= 0)
1960 {
1961 uint64_t counter;
1962 read (evfd, &counter, sizeof (uint64_t));
1963 }
1964 else
1965#endif
1966 {
1967 char dummy[4];
1968#ifdef _WIN32
1969 WSABUF buf;
1970 DWORD recvd;
1971 DWORD flags = 0;
1972 buf.buf = dummy;
1973 buf.len = sizeof (dummy);
1974 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
1975#else
1976 read (evpipe [0], &dummy, sizeof (dummy));
1977#endif
1978 }
1979 }
1980
1981 pipe_write_skipped = 0;
1982
1983 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1984
1985#if EV_SIGNAL_ENABLE
1986 if (sig_pending)
1987 {
1988 sig_pending = 0;
1989
1990 ECB_MEMORY_FENCE;
1991
1992 for (i = EV_NSIG - 1; i--; )
1993 if (expect_false (signals [i].pending))
1994 ev_feed_signal_event (EV_A_ i + 1);
1995 }
1996#endif
1997
1998#if EV_ASYNC_ENABLE
1999 if (async_pending)
2000 {
2001 async_pending = 0;
2002
2003 ECB_MEMORY_FENCE;
2004
2005 for (i = asynccnt; i--; )
2006 if (asyncs [i]->sent)
2007 {
2008 asyncs [i]->sent = 0;
2009 ECB_MEMORY_FENCE_RELEASE;
2010 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
2011 }
2012 }
2013#endif
674} 2014}
675 2015
676/*****************************************************************************/ 2016/*****************************************************************************/
677 2017
678static struct ev_child *childs [PID_HASHSIZE]; 2018void
2019ev_feed_signal (int signum) EV_THROW
2020{
2021#if EV_MULTIPLICITY
2022 EV_P = signals [signum - 1].loop;
679 2023
2024 if (!EV_A)
2025 return;
2026#endif
2027
2028 if (!ev_active (&pipe_w))
2029 return;
2030
2031 signals [signum - 1].pending = 1;
2032 evpipe_write (EV_A_ &sig_pending);
2033}
2034
2035static void
2036ev_sighandler (int signum)
2037{
680#ifndef _WIN32 2038#ifdef _WIN32
2039 signal (signum, ev_sighandler);
2040#endif
681 2041
2042 ev_feed_signal (signum);
2043}
2044
2045void noinline
2046ev_feed_signal_event (EV_P_ int signum) EV_THROW
2047{
2048 WL w;
2049
2050 if (expect_false (signum <= 0 || signum > EV_NSIG))
2051 return;
2052
2053 --signum;
2054
2055#if EV_MULTIPLICITY
2056 /* it is permissible to try to feed a signal to the wrong loop */
2057 /* or, likely more useful, feeding a signal nobody is waiting for */
2058
2059 if (expect_false (signals [signum].loop != EV_A))
2060 return;
2061#endif
2062
2063 signals [signum].pending = 0;
2064 ECB_MEMORY_FENCE_RELEASE;
2065
2066 for (w = signals [signum].head; w; w = w->next)
2067 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2068}
2069
2070#if EV_USE_SIGNALFD
2071static void
2072sigfdcb (EV_P_ ev_io *iow, int revents)
2073{
2074 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2075
2076 for (;;)
2077 {
2078 ssize_t res = read (sigfd, si, sizeof (si));
2079
2080 /* not ISO-C, as res might be -1, but works with SuS */
2081 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2082 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2083
2084 if (res < (ssize_t)sizeof (si))
2085 break;
2086 }
2087}
2088#endif
2089
2090#endif
2091
2092/*****************************************************************************/
2093
2094#if EV_CHILD_ENABLE
2095static WL childs [EV_PID_HASHSIZE];
2096
682static struct ev_signal childev; 2097static ev_signal childev;
2098
2099#ifndef WIFCONTINUED
2100# define WIFCONTINUED(status) 0
2101#endif
2102
2103/* handle a single child status event */
2104inline_speed void
2105child_reap (EV_P_ int chain, int pid, int status)
2106{
2107 ev_child *w;
2108 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
2109
2110 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2111 {
2112 if ((w->pid == pid || !w->pid)
2113 && (!traced || (w->flags & 1)))
2114 {
2115 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
2116 w->rpid = pid;
2117 w->rstatus = status;
2118 ev_feed_event (EV_A_ (W)w, EV_CHILD);
2119 }
2120 }
2121}
683 2122
684#ifndef WCONTINUED 2123#ifndef WCONTINUED
685# define WCONTINUED 0 2124# define WCONTINUED 0
686#endif 2125#endif
687 2126
2127/* called on sigchld etc., calls waitpid */
688static void 2128static void
689child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
690{
691 struct ev_child *w;
692
693 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
694 if (w->pid == pid || !w->pid)
695 {
696 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
697 w->rpid = pid;
698 w->rstatus = status;
699 ev_feed_event (EV_A_ (W)w, EV_CHILD);
700 }
701}
702
703static void
704childcb (EV_P_ struct ev_signal *sw, int revents) 2129childcb (EV_P_ ev_signal *sw, int revents)
705{ 2130{
706 int pid, status; 2131 int pid, status;
707 2132
2133 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
708 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 2134 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
709 { 2135 if (!WCONTINUED
2136 || errno != EINVAL
2137 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
2138 return;
2139
710 /* make sure we are called again until all childs have been reaped */ 2140 /* make sure we are called again until all children have been reaped */
2141 /* we need to do it this way so that the callback gets called before we continue */
711 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2142 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
712 2143
713 child_reap (EV_A_ sw, pid, pid, status); 2144 child_reap (EV_A_ pid, pid, status);
2145 if ((EV_PID_HASHSIZE) > 1)
714 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 2146 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
715 }
716} 2147}
717 2148
718#endif 2149#endif
719 2150
720/*****************************************************************************/ 2151/*****************************************************************************/
721 2152
2153#if EV_USE_IOCP
2154# include "ev_iocp.c"
2155#endif
722#if EV_USE_PORT 2156#if EV_USE_PORT
723# include "ev_port.c" 2157# include "ev_port.c"
724#endif 2158#endif
725#if EV_USE_KQUEUE 2159#if EV_USE_KQUEUE
726# include "ev_kqueue.c" 2160# include "ev_kqueue.c"
… …
733#endif 2167#endif
734#if EV_USE_SELECT 2168#if EV_USE_SELECT
735# include "ev_select.c" 2169# include "ev_select.c"
736#endif 2170#endif
737 2171
738int 2172int ecb_cold
739ev_version_major (void) 2173ev_version_major (void) EV_THROW
740{ 2174{
741 return EV_VERSION_MAJOR; 2175 return EV_VERSION_MAJOR;
742} 2176}
743 2177
744int 2178int ecb_cold
745ev_version_minor (void) 2179ev_version_minor (void) EV_THROW
746{ 2180{
747 return EV_VERSION_MINOR; 2181 return EV_VERSION_MINOR;
748} 2182}
749 2183
750/* return true if we are running with elevated privileges and should ignore env variables */ 2184/* return true if we are running with elevated privileges and should ignore env variables */
751static int 2185int inline_size ecb_cold
752enable_secure (void) 2186enable_secure (void)
753{ 2187{
754#ifdef _WIN32 2188#ifdef _WIN32
755 return 0; 2189 return 0;
756#else 2190#else
757 return getuid () != geteuid () 2191 return getuid () != geteuid ()
758 || getgid () != getegid (); 2192 || getgid () != getegid ();
759#endif 2193#endif
760} 2194}
761 2195
2196unsigned int ecb_cold
2197ev_supported_backends (void) EV_THROW
2198{
2199 unsigned int flags = 0;
2200
2201 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2202 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
2203 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2204 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2205 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2206
2207 return flags;
2208}
2209
2210unsigned int ecb_cold
2211ev_recommended_backends (void) EV_THROW
2212{
2213 unsigned int flags = ev_supported_backends ();
2214
2215#ifndef __NetBSD__
2216 /* kqueue is borked on everything but netbsd apparently */
2217 /* it usually doesn't work correctly on anything but sockets and pipes */
2218 flags &= ~EVBACKEND_KQUEUE;
2219#endif
2220#ifdef __APPLE__
2221 /* only select works correctly on that "unix-certified" platform */
2222 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2223 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2224#endif
2225#ifdef __FreeBSD__
2226 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2227#endif
2228
2229 return flags;
2230}
2231
2232unsigned int ecb_cold
2233ev_embeddable_backends (void) EV_THROW
2234{
2235 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2236
2237 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2238 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2239 flags &= ~EVBACKEND_EPOLL;
2240
2241 return flags;
2242}
2243
762unsigned int 2244unsigned int
763ev_method (EV_P) 2245ev_backend (EV_P) EV_THROW
764{ 2246{
765 return method; 2247 return backend;
766} 2248}
767 2249
768static void 2250#if EV_FEATURE_API
2251unsigned int
2252ev_iteration (EV_P) EV_THROW
2253{
2254 return loop_count;
2255}
2256
2257unsigned int
2258ev_depth (EV_P) EV_THROW
2259{
2260 return loop_depth;
2261}
2262
2263void
2264ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2265{
2266 io_blocktime = interval;
2267}
2268
2269void
2270ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2271{
2272 timeout_blocktime = interval;
2273}
2274
2275void
2276ev_set_userdata (EV_P_ void *data) EV_THROW
2277{
2278 userdata = data;
2279}
2280
2281void *
2282ev_userdata (EV_P) EV_THROW
2283{
2284 return userdata;
2285}
2286
2287void
2288ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
2289{
2290 invoke_cb = invoke_pending_cb;
2291}
2292
2293void
2294ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2295{
2296 release_cb = release;
2297 acquire_cb = acquire;
2298}
2299#endif
2300
2301/* initialise a loop structure, must be zero-initialised */
2302static void noinline ecb_cold
769loop_init (EV_P_ unsigned int flags) 2303loop_init (EV_P_ unsigned int flags) EV_THROW
770{ 2304{
771 if (!method) 2305 if (!backend)
772 { 2306 {
2307 origflags = flags;
2308
2309#if EV_USE_REALTIME
2310 if (!have_realtime)
2311 {
2312 struct timespec ts;
2313
2314 if (!clock_gettime (CLOCK_REALTIME, &ts))
2315 have_realtime = 1;
2316 }
2317#endif
2318
773#if EV_USE_MONOTONIC 2319#if EV_USE_MONOTONIC
2320 if (!have_monotonic)
774 { 2321 {
775 struct timespec ts; 2322 struct timespec ts;
2323
776 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2324 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
777 have_monotonic = 1; 2325 have_monotonic = 1;
778 } 2326 }
779#endif 2327#endif
780 2328
781 ev_rt_now = ev_time (); 2329 /* pid check not overridable via env */
782 mn_now = get_clock (); 2330#ifndef _WIN32
783 now_floor = mn_now; 2331 if (flags & EVFLAG_FORKCHECK)
784 rtmn_diff = ev_rt_now - mn_now; 2332 curpid = getpid ();
2333#endif
785 2334
786 if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS")) 2335 if (!(flags & EVFLAG_NOENV)
2336 && !enable_secure ()
2337 && getenv ("LIBEV_FLAGS"))
787 flags = atoi (getenv ("LIBEV_FLAGS")); 2338 flags = atoi (getenv ("LIBEV_FLAGS"));
788 2339
789 if (!(flags & 0x0000ffff)) 2340 ev_rt_now = ev_time ();
790 flags |= 0x0000ffff; 2341 mn_now = get_clock ();
2342 now_floor = mn_now;
2343 rtmn_diff = ev_rt_now - mn_now;
2344#if EV_FEATURE_API
2345 invoke_cb = ev_invoke_pending;
2346#endif
791 2347
792 method = 0; 2348 io_blocktime = 0.;
2349 timeout_blocktime = 0.;
2350 backend = 0;
2351 backend_fd = -1;
2352 sig_pending = 0;
2353#if EV_ASYNC_ENABLE
2354 async_pending = 0;
2355#endif
2356 pipe_write_skipped = 0;
2357 pipe_write_wanted = 0;
2358#if EV_USE_INOTIFY
2359 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2360#endif
2361#if EV_USE_SIGNALFD
2362 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2363#endif
2364
2365 if (!(flags & EVBACKEND_MASK))
2366 flags |= ev_recommended_backends ();
2367
2368#if EV_USE_IOCP
2369 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2370#endif
793#if EV_USE_PORT 2371#if EV_USE_PORT
794 if (!method && (flags & EVMETHOD_PORT )) method = port_init (EV_A_ flags); 2372 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
795#endif 2373#endif
796#if EV_USE_KQUEUE 2374#if EV_USE_KQUEUE
797 if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags); 2375 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
798#endif 2376#endif
799#if EV_USE_EPOLL 2377#if EV_USE_EPOLL
800 if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags); 2378 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
801#endif 2379#endif
802#if EV_USE_POLL 2380#if EV_USE_POLL
803 if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags); 2381 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
804#endif 2382#endif
805#if EV_USE_SELECT 2383#if EV_USE_SELECT
806 if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags); 2384 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
807#endif 2385#endif
808 2386
2387 ev_prepare_init (&pending_w, pendingcb);
2388
2389#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
809 ev_init (&sigev, sigcb); 2390 ev_init (&pipe_w, pipecb);
810 ev_set_priority (&sigev, EV_MAXPRI); 2391 ev_set_priority (&pipe_w, EV_MAXPRI);
2392#endif
811 } 2393 }
812} 2394}
813 2395
814static void 2396/* free up a loop structure */
2397void ecb_cold
815loop_destroy (EV_P) 2398ev_loop_destroy (EV_P)
816{ 2399{
817 int i; 2400 int i;
818 2401
2402#if EV_MULTIPLICITY
2403 /* mimic free (0) */
2404 if (!EV_A)
2405 return;
2406#endif
2407
2408#if EV_CLEANUP_ENABLE
2409 /* queue cleanup watchers (and execute them) */
2410 if (expect_false (cleanupcnt))
2411 {
2412 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2413 EV_INVOKE_PENDING;
2414 }
2415#endif
2416
2417#if EV_CHILD_ENABLE
2418 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2419 {
2420 ev_ref (EV_A); /* child watcher */
2421 ev_signal_stop (EV_A_ &childev);
2422 }
2423#endif
2424
2425 if (ev_is_active (&pipe_w))
2426 {
2427 /*ev_ref (EV_A);*/
2428 /*ev_io_stop (EV_A_ &pipe_w);*/
2429
2430#if EV_USE_EVENTFD
2431 if (evfd >= 0)
2432 close (evfd);
2433#endif
2434
2435 if (evpipe [0] >= 0)
2436 {
2437 EV_WIN32_CLOSE_FD (evpipe [0]);
2438 EV_WIN32_CLOSE_FD (evpipe [1]);
2439 }
2440 }
2441
2442#if EV_USE_SIGNALFD
2443 if (ev_is_active (&sigfd_w))
2444 close (sigfd);
2445#endif
2446
2447#if EV_USE_INOTIFY
2448 if (fs_fd >= 0)
2449 close (fs_fd);
2450#endif
2451
2452 if (backend_fd >= 0)
2453 close (backend_fd);
2454
2455#if EV_USE_IOCP
2456 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2457#endif
819#if EV_USE_PORT 2458#if EV_USE_PORT
820 if (method == EVMETHOD_PORT ) port_destroy (EV_A); 2459 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
821#endif 2460#endif
822#if EV_USE_KQUEUE 2461#if EV_USE_KQUEUE
823 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 2462 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
824#endif 2463#endif
825#if EV_USE_EPOLL 2464#if EV_USE_EPOLL
826 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 2465 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
827#endif 2466#endif
828#if EV_USE_POLL 2467#if EV_USE_POLL
829 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 2468 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
830#endif 2469#endif
831#if EV_USE_SELECT 2470#if EV_USE_SELECT
832 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 2471 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
833#endif 2472#endif
834 2473
835 for (i = NUMPRI; i--; ) 2474 for (i = NUMPRI; i--; )
2475 {
836 array_free (pending, [i]); 2476 array_free (pending, [i]);
2477#if EV_IDLE_ENABLE
2478 array_free (idle, [i]);
2479#endif
2480 }
2481
2482 ev_free (anfds); anfds = 0; anfdmax = 0;
837 2483
838 /* have to use the microsoft-never-gets-it-right macro */ 2484 /* have to use the microsoft-never-gets-it-right macro */
2485 array_free (rfeed, EMPTY);
839 array_free (fdchange, EMPTY0); 2486 array_free (fdchange, EMPTY);
840 array_free (timer, EMPTY0); 2487 array_free (timer, EMPTY);
841#if EV_PERIODICS 2488#if EV_PERIODIC_ENABLE
842 array_free (periodic, EMPTY0); 2489 array_free (periodic, EMPTY);
843#endif 2490#endif
2491#if EV_FORK_ENABLE
2492 array_free (fork, EMPTY);
2493#endif
2494#if EV_CLEANUP_ENABLE
844 array_free (idle, EMPTY0); 2495 array_free (cleanup, EMPTY);
2496#endif
845 array_free (prepare, EMPTY0); 2497 array_free (prepare, EMPTY);
846 array_free (check, EMPTY0); 2498 array_free (check, EMPTY);
2499#if EV_ASYNC_ENABLE
2500 array_free (async, EMPTY);
2501#endif
847 2502
848 method = 0; 2503 backend = 0;
849}
850 2504
851static void 2505#if EV_MULTIPLICITY
2506 if (ev_is_default_loop (EV_A))
2507#endif
2508 ev_default_loop_ptr = 0;
2509#if EV_MULTIPLICITY
2510 else
2511 ev_free (EV_A);
2512#endif
2513}
2514
2515#if EV_USE_INOTIFY
2516inline_size void infy_fork (EV_P);
2517#endif
2518
2519inline_size void
852loop_fork (EV_P) 2520loop_fork (EV_P)
853{ 2521{
854#if EV_USE_PORT 2522#if EV_USE_PORT
855 if (method == EVMETHOD_PORT ) port_fork (EV_A); 2523 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
856#endif 2524#endif
857#if EV_USE_KQUEUE 2525#if EV_USE_KQUEUE
858 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 2526 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
859#endif 2527#endif
860#if EV_USE_EPOLL 2528#if EV_USE_EPOLL
861 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 2529 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
862#endif 2530#endif
2531#if EV_USE_INOTIFY
2532 infy_fork (EV_A);
2533#endif
863 2534
864 if (ev_is_active (&sigev)) 2535 if (ev_is_active (&pipe_w))
865 { 2536 {
866 /* default loop */ 2537 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
867 2538
868 ev_ref (EV_A); 2539 ev_ref (EV_A);
869 ev_io_stop (EV_A_ &sigev); 2540 ev_io_stop (EV_A_ &pipe_w);
870 close (sigpipe [0]);
871 close (sigpipe [1]);
872 2541
873 while (pipe (sigpipe)) 2542#if EV_USE_EVENTFD
874 syserr ("(libev) error creating pipe"); 2543 if (evfd >= 0)
2544 close (evfd);
2545#endif
875 2546
2547 if (evpipe [0] >= 0)
2548 {
2549 EV_WIN32_CLOSE_FD (evpipe [0]);
2550 EV_WIN32_CLOSE_FD (evpipe [1]);
2551 }
2552
2553#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
876 siginit (EV_A); 2554 evpipe_init (EV_A);
2555 /* now iterate over everything, in case we missed something */
2556 pipecb (EV_A_ &pipe_w, EV_READ);
2557#endif
877 } 2558 }
878 2559
879 postfork = 0; 2560 postfork = 0;
880} 2561}
881 2562
882#if EV_MULTIPLICITY 2563#if EV_MULTIPLICITY
2564
883struct ev_loop * 2565struct ev_loop * ecb_cold
884ev_loop_new (unsigned int flags) 2566ev_loop_new (unsigned int flags) EV_THROW
885{ 2567{
886 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2568 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
887 2569
888 memset (loop, 0, sizeof (struct ev_loop)); 2570 memset (EV_A, 0, sizeof (struct ev_loop));
889
890 loop_init (EV_A_ flags); 2571 loop_init (EV_A_ flags);
891 2572
892 if (ev_method (EV_A)) 2573 if (ev_backend (EV_A))
893 return loop; 2574 return EV_A;
894 2575
2576 ev_free (EV_A);
895 return 0; 2577 return 0;
896} 2578}
897 2579
898void 2580#endif /* multiplicity */
899ev_loop_destroy (EV_P)
900{
901 loop_destroy (EV_A);
902 ev_free (loop);
903}
904 2581
905void 2582#if EV_VERIFY
906ev_loop_fork (EV_P) 2583static void noinline ecb_cold
2584verify_watcher (EV_P_ W w)
907{ 2585{
908 postfork = 1; 2586 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
909}
910 2587
2588 if (w->pending)
2589 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2590}
2591
2592static void noinline ecb_cold
2593verify_heap (EV_P_ ANHE *heap, int N)
2594{
2595 int i;
2596
2597 for (i = HEAP0; i < N + HEAP0; ++i)
2598 {
2599 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2600 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2601 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2602
2603 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2604 }
2605}
2606
2607static void noinline ecb_cold
2608array_verify (EV_P_ W *ws, int cnt)
2609{
2610 while (cnt--)
2611 {
2612 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2613 verify_watcher (EV_A_ ws [cnt]);
2614 }
2615}
2616#endif
2617
2618#if EV_FEATURE_API
2619void ecb_cold
2620ev_verify (EV_P) EV_THROW
2621{
2622#if EV_VERIFY
2623 int i;
2624 WL w, w2;
2625
2626 assert (activecnt >= -1);
2627
2628 assert (fdchangemax >= fdchangecnt);
2629 for (i = 0; i < fdchangecnt; ++i)
2630 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2631
2632 assert (anfdmax >= 0);
2633 for (i = 0; i < anfdmax; ++i)
2634 {
2635 int j = 0;
2636
2637 for (w = w2 = anfds [i].head; w; w = w->next)
2638 {
2639 verify_watcher (EV_A_ (W)w);
2640
2641 if (j++ & 1)
2642 {
2643 assert (("libev: io watcher list contains a loop", w != w2));
2644 w2 = w2->next;
2645 }
2646
2647 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2648 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2649 }
2650 }
2651
2652 assert (timermax >= timercnt);
2653 verify_heap (EV_A_ timers, timercnt);
2654
2655#if EV_PERIODIC_ENABLE
2656 assert (periodicmax >= periodiccnt);
2657 verify_heap (EV_A_ periodics, periodiccnt);
2658#endif
2659
2660 for (i = NUMPRI; i--; )
2661 {
2662 assert (pendingmax [i] >= pendingcnt [i]);
2663#if EV_IDLE_ENABLE
2664 assert (idleall >= 0);
2665 assert (idlemax [i] >= idlecnt [i]);
2666 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2667#endif
2668 }
2669
2670#if EV_FORK_ENABLE
2671 assert (forkmax >= forkcnt);
2672 array_verify (EV_A_ (W *)forks, forkcnt);
2673#endif
2674
2675#if EV_CLEANUP_ENABLE
2676 assert (cleanupmax >= cleanupcnt);
2677 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2678#endif
2679
2680#if EV_ASYNC_ENABLE
2681 assert (asyncmax >= asynccnt);
2682 array_verify (EV_A_ (W *)asyncs, asynccnt);
2683#endif
2684
2685#if EV_PREPARE_ENABLE
2686 assert (preparemax >= preparecnt);
2687 array_verify (EV_A_ (W *)prepares, preparecnt);
2688#endif
2689
2690#if EV_CHECK_ENABLE
2691 assert (checkmax >= checkcnt);
2692 array_verify (EV_A_ (W *)checks, checkcnt);
2693#endif
2694
2695# if 0
2696#if EV_CHILD_ENABLE
2697 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2698 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2699#endif
2700# endif
2701#endif
2702}
911#endif 2703#endif
912 2704
913#if EV_MULTIPLICITY 2705#if EV_MULTIPLICITY
914struct ev_loop * 2706struct ev_loop * ecb_cold
915ev_default_loop_init (unsigned int flags)
916#else 2707#else
917int 2708int
2709#endif
918ev_default_loop (unsigned int flags) 2710ev_default_loop (unsigned int flags) EV_THROW
919#endif
920{ 2711{
921 if (sigpipe [0] == sigpipe [1])
922 if (pipe (sigpipe))
923 return 0;
924
925 if (!ev_default_loop_ptr) 2712 if (!ev_default_loop_ptr)
926 { 2713 {
927#if EV_MULTIPLICITY 2714#if EV_MULTIPLICITY
928 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2715 EV_P = ev_default_loop_ptr = &default_loop_struct;
929#else 2716#else
930 ev_default_loop_ptr = 1; 2717 ev_default_loop_ptr = 1;
931#endif 2718#endif
932 2719
933 loop_init (EV_A_ flags); 2720 loop_init (EV_A_ flags);
934 2721
935 if (ev_method (EV_A)) 2722 if (ev_backend (EV_A))
936 { 2723 {
937 siginit (EV_A); 2724#if EV_CHILD_ENABLE
938
939#ifndef _WIN32
940 ev_signal_init (&childev, childcb, SIGCHLD); 2725 ev_signal_init (&childev, childcb, SIGCHLD);
941 ev_set_priority (&childev, EV_MAXPRI); 2726 ev_set_priority (&childev, EV_MAXPRI);
942 ev_signal_start (EV_A_ &childev); 2727 ev_signal_start (EV_A_ &childev);
943 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2728 ev_unref (EV_A); /* child watcher should not keep loop alive */
944#endif 2729#endif
… …
949 2734
950 return ev_default_loop_ptr; 2735 return ev_default_loop_ptr;
951} 2736}
952 2737
953void 2738void
954ev_default_destroy (void) 2739ev_loop_fork (EV_P) EV_THROW
955{ 2740{
956#if EV_MULTIPLICITY 2741 postfork = 1;
957 struct ev_loop *loop = ev_default_loop_ptr;
958#endif
959
960#ifndef _WIN32
961 ev_ref (EV_A); /* child watcher */
962 ev_signal_stop (EV_A_ &childev);
963#endif
964
965 ev_ref (EV_A); /* signal watcher */
966 ev_io_stop (EV_A_ &sigev);
967
968 close (sigpipe [0]); sigpipe [0] = 0;
969 close (sigpipe [1]); sigpipe [1] = 0;
970
971 loop_destroy (EV_A);
972} 2742}
2743
2744/*****************************************************************************/
973 2745
974void 2746void
975ev_default_fork (void) 2747ev_invoke (EV_P_ void *w, int revents)
976{ 2748{
977#if EV_MULTIPLICITY 2749 EV_CB_INVOKE ((W)w, revents);
978 struct ev_loop *loop = ev_default_loop_ptr;
979#endif
980
981 if (method)
982 postfork = 1;
983} 2750}
984 2751
985/*****************************************************************************/ 2752unsigned int
986 2753ev_pending_count (EV_P) EV_THROW
987static int
988any_pending (EV_P)
989{ 2754{
990 int pri; 2755 int pri;
2756 unsigned int count = 0;
991 2757
992 for (pri = NUMPRI; pri--; ) 2758 for (pri = NUMPRI; pri--; )
993 if (pendingcnt [pri]) 2759 count += pendingcnt [pri];
994 return 1;
995 2760
996 return 0; 2761 return count;
997} 2762}
998 2763
999inline void 2764void noinline
1000call_pending (EV_P) 2765ev_invoke_pending (EV_P)
1001{ 2766{
1002 int pri; 2767 for (pendingpri = NUMPRI; pendingpri--; ) /* pendingpri is modified during the loop */
1003
1004 for (pri = NUMPRI; pri--; )
1005 while (pendingcnt [pri]) 2768 while (pendingcnt [pendingpri])
1006 { 2769 {
1007 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2770 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1008 2771
1009 if (expect_true (p->w))
1010 {
1011 p->w->pending = 0; 2772 p->w->pending = 0;
1012 EV_CB_INVOKE (p->w, p->events); 2773 EV_CB_INVOKE (p->w, p->events);
1013 } 2774 EV_FREQUENT_CHECK;
1014 } 2775 }
1015} 2776}
1016 2777
2778#if EV_IDLE_ENABLE
2779/* make idle watchers pending. this handles the "call-idle */
2780/* only when higher priorities are idle" logic */
1017inline void 2781inline_size void
2782idle_reify (EV_P)
2783{
2784 if (expect_false (idleall))
2785 {
2786 int pri;
2787
2788 for (pri = NUMPRI; pri--; )
2789 {
2790 if (pendingcnt [pri])
2791 break;
2792
2793 if (idlecnt [pri])
2794 {
2795 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2796 break;
2797 }
2798 }
2799 }
2800}
2801#endif
2802
2803/* make timers pending */
2804inline_size void
1018timers_reify (EV_P) 2805timers_reify (EV_P)
1019{ 2806{
2807 EV_FREQUENT_CHECK;
2808
1020 while (timercnt && ((WT)timers [0])->at <= mn_now) 2809 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1021 { 2810 {
1022 struct ev_timer *w = timers [0]; 2811 do
1023
1024 assert (("inactive timer on timer heap detected", ev_is_active (w)));
1025
1026 /* first reschedule or stop timer */
1027 if (w->repeat)
1028 { 2812 {
2813 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2814
2815 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2816
2817 /* first reschedule or stop timer */
2818 if (w->repeat)
2819 {
2820 ev_at (w) += w->repeat;
2821 if (ev_at (w) < mn_now)
2822 ev_at (w) = mn_now;
2823
1029 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2824 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1030 2825
1031 ((WT)w)->at += w->repeat; 2826 ANHE_at_cache (timers [HEAP0]);
1032 if (((WT)w)->at < mn_now)
1033 ((WT)w)->at = mn_now;
1034
1035 downheap ((WT *)timers, timercnt, 0); 2827 downheap (timers, timercnt, HEAP0);
2828 }
2829 else
2830 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2831
2832 EV_FREQUENT_CHECK;
2833 feed_reverse (EV_A_ (W)w);
1036 } 2834 }
1037 else 2835 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1038 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1039 2836
1040 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2837 feed_reverse_done (EV_A_ EV_TIMER);
2838 }
2839}
2840
2841#if EV_PERIODIC_ENABLE
2842
2843static void noinline
2844periodic_recalc (EV_P_ ev_periodic *w)
2845{
2846 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2847 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2848
2849 /* the above almost always errs on the low side */
2850 while (at <= ev_rt_now)
1041 } 2851 {
1042} 2852 ev_tstamp nat = at + w->interval;
1043 2853
1044#if EV_PERIODICS 2854 /* when resolution fails us, we use ev_rt_now */
2855 if (expect_false (nat == at))
2856 {
2857 at = ev_rt_now;
2858 break;
2859 }
2860
2861 at = nat;
2862 }
2863
2864 ev_at (w) = at;
2865}
2866
2867/* make periodics pending */
1045inline void 2868inline_size void
1046periodics_reify (EV_P) 2869periodics_reify (EV_P)
1047{ 2870{
2871 EV_FREQUENT_CHECK;
2872
1048 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 2873 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1049 { 2874 {
1050 struct ev_periodic *w = periodics [0]; 2875 do
2876 {
2877 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1051 2878
1052 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 2879 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1053 2880
1054 /* first reschedule or stop timer */ 2881 /* first reschedule or stop timer */
2882 if (w->reschedule_cb)
2883 {
2884 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2885
2886 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2887
2888 ANHE_at_cache (periodics [HEAP0]);
2889 downheap (periodics, periodiccnt, HEAP0);
2890 }
2891 else if (w->interval)
2892 {
2893 periodic_recalc (EV_A_ w);
2894 ANHE_at_cache (periodics [HEAP0]);
2895 downheap (periodics, periodiccnt, HEAP0);
2896 }
2897 else
2898 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2899
2900 EV_FREQUENT_CHECK;
2901 feed_reverse (EV_A_ (W)w);
2902 }
2903 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2904
2905 feed_reverse_done (EV_A_ EV_PERIODIC);
2906 }
2907}
2908
2909/* simply recalculate all periodics */
2910/* TODO: maybe ensure that at least one event happens when jumping forward? */
2911static void noinline ecb_cold
2912periodics_reschedule (EV_P)
2913{
2914 int i;
2915
2916 /* adjust periodics after time jump */
2917 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2918 {
2919 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2920
1055 if (w->reschedule_cb) 2921 if (w->reschedule_cb)
2922 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2923 else if (w->interval)
2924 periodic_recalc (EV_A_ w);
2925
2926 ANHE_at_cache (periodics [i]);
2927 }
2928
2929 reheap (periodics, periodiccnt);
2930}
2931#endif
2932
2933/* adjust all timers by a given offset */
2934static void noinline ecb_cold
2935timers_reschedule (EV_P_ ev_tstamp adjust)
2936{
2937 int i;
2938
2939 for (i = 0; i < timercnt; ++i)
2940 {
2941 ANHE *he = timers + i + HEAP0;
2942 ANHE_w (*he)->at += adjust;
2943 ANHE_at_cache (*he);
2944 }
2945}
2946
2947/* fetch new monotonic and realtime times from the kernel */
2948/* also detect if there was a timejump, and act accordingly */
2949inline_speed void
2950time_update (EV_P_ ev_tstamp max_block)
2951{
2952#if EV_USE_MONOTONIC
2953 if (expect_true (have_monotonic))
2954 {
2955 int i;
2956 ev_tstamp odiff = rtmn_diff;
2957
2958 mn_now = get_clock ();
2959
2960 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2961 /* interpolate in the meantime */
2962 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1056 { 2963 {
1057 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 2964 ev_rt_now = rtmn_diff + mn_now;
1058 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 2965 return;
1059 downheap ((WT *)periodics, periodiccnt, 0);
1060 } 2966 }
1061 else if (w->interval)
1062 {
1063 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1064 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1065 downheap ((WT *)periodics, periodiccnt, 0);
1066 }
1067 else
1068 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1069 2967
1070 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1071 }
1072}
1073
1074static void
1075periodics_reschedule (EV_P)
1076{
1077 int i;
1078
1079 /* adjust periodics after time jump */
1080 for (i = 0; i < periodiccnt; ++i)
1081 {
1082 struct ev_periodic *w = periodics [i];
1083
1084 if (w->reschedule_cb)
1085 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1086 else if (w->interval)
1087 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1088 }
1089
1090 /* now rebuild the heap */
1091 for (i = periodiccnt >> 1; i--; )
1092 downheap ((WT *)periodics, periodiccnt, i);
1093}
1094#endif
1095
1096inline int
1097time_update_monotonic (EV_P)
1098{
1099 mn_now = get_clock ();
1100
1101 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1102 {
1103 ev_rt_now = rtmn_diff + mn_now;
1104 return 0;
1105 }
1106 else
1107 {
1108 now_floor = mn_now; 2968 now_floor = mn_now;
1109 ev_rt_now = ev_time (); 2969 ev_rt_now = ev_time ();
1110 return 1;
1111 }
1112}
1113 2970
1114inline void 2971 /* loop a few times, before making important decisions.
1115time_update (EV_P) 2972 * on the choice of "4": one iteration isn't enough,
1116{ 2973 * in case we get preempted during the calls to
1117 int i; 2974 * ev_time and get_clock. a second call is almost guaranteed
1118 2975 * to succeed in that case, though. and looping a few more times
1119#if EV_USE_MONOTONIC 2976 * doesn't hurt either as we only do this on time-jumps or
1120 if (expect_true (have_monotonic)) 2977 * in the unlikely event of having been preempted here.
1121 { 2978 */
1122 if (time_update_monotonic (EV_A)) 2979 for (i = 4; --i; )
1123 { 2980 {
1124 ev_tstamp odiff = rtmn_diff; 2981 ev_tstamp diff;
1125
1126 for (i = 4; --i; ) /* loop a few times, before making important decisions */
1127 {
1128 rtmn_diff = ev_rt_now - mn_now; 2982 rtmn_diff = ev_rt_now - mn_now;
1129 2983
1130 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2984 diff = odiff - rtmn_diff;
2985
2986 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1131 return; /* all is well */ 2987 return; /* all is well */
1132 2988
1133 ev_rt_now = ev_time (); 2989 ev_rt_now = ev_time ();
1134 mn_now = get_clock (); 2990 mn_now = get_clock ();
1135 now_floor = mn_now; 2991 now_floor = mn_now;
1136 } 2992 }
1137 2993
2994 /* no timer adjustment, as the monotonic clock doesn't jump */
2995 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1138# if EV_PERIODICS 2996# if EV_PERIODIC_ENABLE
2997 periodics_reschedule (EV_A);
2998# endif
2999 }
3000 else
3001#endif
3002 {
3003 ev_rt_now = ev_time ();
3004
3005 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
3006 {
3007 /* adjust timers. this is easy, as the offset is the same for all of them */
3008 timers_reschedule (EV_A_ ev_rt_now - mn_now);
3009#if EV_PERIODIC_ENABLE
1139 periodics_reschedule (EV_A); 3010 periodics_reschedule (EV_A);
1140# endif 3011#endif
1141 /* no timer adjustment, as the monotonic clock doesn't jump */
1142 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1143 } 3012 }
1144 }
1145 else
1146#endif
1147 {
1148 ev_rt_now = ev_time ();
1149
1150 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1151 {
1152#if EV_PERIODICS
1153 periodics_reschedule (EV_A);
1154#endif
1155
1156 /* adjust timers. this is easy, as the offset is the same for all */
1157 for (i = 0; i < timercnt; ++i)
1158 ((WT)timers [i])->at += ev_rt_now - mn_now;
1159 }
1160 3013
1161 mn_now = ev_rt_now; 3014 mn_now = ev_rt_now;
1162 } 3015 }
1163} 3016}
1164 3017
1165void 3018int
1166ev_ref (EV_P)
1167{
1168 ++activecnt;
1169}
1170
1171void
1172ev_unref (EV_P)
1173{
1174 --activecnt;
1175}
1176
1177static int loop_done;
1178
1179void
1180ev_loop (EV_P_ int flags) 3019ev_run (EV_P_ int flags)
1181{ 3020{
1182 double block; 3021#if EV_FEATURE_API
1183 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 3022 ++loop_depth;
3023#endif
1184 3024
1185 while (activecnt) 3025 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3026
3027 loop_done = EVBREAK_CANCEL;
3028
3029 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
3030
3031 do
1186 { 3032 {
3033#if EV_VERIFY >= 2
3034 ev_verify (EV_A);
3035#endif
3036
3037#ifndef _WIN32
3038 if (expect_false (curpid)) /* penalise the forking check even more */
3039 if (expect_false (getpid () != curpid))
3040 {
3041 curpid = getpid ();
3042 postfork = 1;
3043 }
3044#endif
3045
3046#if EV_FORK_ENABLE
3047 /* we might have forked, so queue fork handlers */
3048 if (expect_false (postfork))
3049 if (forkcnt)
3050 {
3051 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
3052 EV_INVOKE_PENDING;
3053 }
3054#endif
3055
3056#if EV_PREPARE_ENABLE
1187 /* queue check watchers (and execute them) */ 3057 /* queue prepare watchers (and execute them) */
1188 if (expect_false (preparecnt)) 3058 if (expect_false (preparecnt))
1189 { 3059 {
1190 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3060 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1191 call_pending (EV_A); 3061 EV_INVOKE_PENDING;
1192 } 3062 }
3063#endif
3064
3065 if (expect_false (loop_done))
3066 break;
1193 3067
1194 /* we might have forked, so reify kernel state if necessary */ 3068 /* we might have forked, so reify kernel state if necessary */
1195 if (expect_false (postfork)) 3069 if (expect_false (postfork))
1196 loop_fork (EV_A); 3070 loop_fork (EV_A);
1197 3071
1198 /* update fd-related kernel structures */ 3072 /* update fd-related kernel structures */
1199 fd_reify (EV_A); 3073 fd_reify (EV_A);
1200 3074
1201 /* calculate blocking time */ 3075 /* calculate blocking time */
3076 {
3077 ev_tstamp waittime = 0.;
3078 ev_tstamp sleeptime = 0.;
1202 3079
1203 /* we only need this for !monotonic clock or timers, but as we basically 3080 /* remember old timestamp for io_blocktime calculation */
1204 always have timers, we just calculate it always */ 3081 ev_tstamp prev_mn_now = mn_now;
1205#if EV_USE_MONOTONIC 3082
1206 if (expect_true (have_monotonic)) 3083 /* update time to cancel out callback processing overhead */
1207 time_update_monotonic (EV_A); 3084 time_update (EV_A_ 1e100);
1208 else 3085
1209#endif 3086 /* from now on, we want a pipe-wake-up */
3087 pipe_write_wanted = 1;
3088
3089 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3090
3091 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1210 { 3092 {
1211 ev_rt_now = ev_time ();
1212 mn_now = ev_rt_now;
1213 }
1214
1215 if (flags & EVLOOP_NONBLOCK || idlecnt)
1216 block = 0.;
1217 else
1218 {
1219 block = MAX_BLOCKTIME; 3093 waittime = MAX_BLOCKTIME;
1220 3094
1221 if (timercnt) 3095 if (timercnt)
1222 { 3096 {
1223 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 3097 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1224 if (block > to) block = to; 3098 if (waittime > to) waittime = to;
1225 } 3099 }
1226 3100
1227#if EV_PERIODICS 3101#if EV_PERIODIC_ENABLE
1228 if (periodiccnt) 3102 if (periodiccnt)
1229 { 3103 {
1230 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 3104 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1231 if (block > to) block = to; 3105 if (waittime > to) waittime = to;
1232 } 3106 }
1233#endif 3107#endif
1234 3108
1235 if (expect_false (block < 0.)) block = 0.; 3109 /* don't let timeouts decrease the waittime below timeout_blocktime */
3110 if (expect_false (waittime < timeout_blocktime))
3111 waittime = timeout_blocktime;
3112
3113 /* at this point, we NEED to wait, so we have to ensure */
3114 /* to pass a minimum nonzero value to the backend */
3115 if (expect_false (waittime < backend_mintime))
3116 waittime = backend_mintime;
3117
3118 /* extra check because io_blocktime is commonly 0 */
3119 if (expect_false (io_blocktime))
3120 {
3121 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3122
3123 if (sleeptime > waittime - backend_mintime)
3124 sleeptime = waittime - backend_mintime;
3125
3126 if (expect_true (sleeptime > 0.))
3127 {
3128 ev_sleep (sleeptime);
3129 waittime -= sleeptime;
3130 }
3131 }
1236 } 3132 }
1237 3133
1238 method_poll (EV_A_ block); 3134#if EV_FEATURE_API
3135 ++loop_count;
3136#endif
3137 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
3138 backend_poll (EV_A_ waittime);
3139 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
1239 3140
3141 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3142
3143 ECB_MEMORY_FENCE_ACQUIRE;
3144 if (pipe_write_skipped)
3145 {
3146 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3147 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3148 }
3149
3150
1240 /* update ev_rt_now, do magic */ 3151 /* update ev_rt_now, do magic */
1241 time_update (EV_A); 3152 time_update (EV_A_ waittime + sleeptime);
3153 }
1242 3154
1243 /* queue pending timers and reschedule them */ 3155 /* queue pending timers and reschedule them */
1244 timers_reify (EV_A); /* relative timers called last */ 3156 timers_reify (EV_A); /* relative timers called last */
1245#if EV_PERIODICS 3157#if EV_PERIODIC_ENABLE
1246 periodics_reify (EV_A); /* absolute timers called first */ 3158 periodics_reify (EV_A); /* absolute timers called first */
1247#endif 3159#endif
1248 3160
3161#if EV_IDLE_ENABLE
1249 /* queue idle watchers unless io or timers are pending */ 3162 /* queue idle watchers unless other events are pending */
1250 if (idlecnt && !any_pending (EV_A)) 3163 idle_reify (EV_A);
1251 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 3164#endif
1252 3165
3166#if EV_CHECK_ENABLE
1253 /* queue check watchers, to be executed first */ 3167 /* queue check watchers, to be executed first */
1254 if (expect_false (checkcnt)) 3168 if (expect_false (checkcnt))
1255 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3169 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3170#endif
1256 3171
1257 call_pending (EV_A); 3172 EV_INVOKE_PENDING;
1258
1259 if (expect_false (loop_done))
1260 break;
1261 } 3173 }
3174 while (expect_true (
3175 activecnt
3176 && !loop_done
3177 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3178 ));
1262 3179
1263 if (loop_done != 2) 3180 if (loop_done == EVBREAK_ONE)
1264 loop_done = 0; 3181 loop_done = EVBREAK_CANCEL;
3182
3183#if EV_FEATURE_API
3184 --loop_depth;
3185#endif
3186
3187 return activecnt;
1265} 3188}
1266 3189
1267void 3190void
1268ev_unloop (EV_P_ int how) 3191ev_break (EV_P_ int how) EV_THROW
1269{ 3192{
1270 loop_done = how; 3193 loop_done = how;
1271} 3194}
1272 3195
3196void
3197ev_ref (EV_P) EV_THROW
3198{
3199 ++activecnt;
3200}
3201
3202void
3203ev_unref (EV_P) EV_THROW
3204{
3205 --activecnt;
3206}
3207
3208void
3209ev_now_update (EV_P) EV_THROW
3210{
3211 time_update (EV_A_ 1e100);
3212}
3213
3214void
3215ev_suspend (EV_P) EV_THROW
3216{
3217 ev_now_update (EV_A);
3218}
3219
3220void
3221ev_resume (EV_P) EV_THROW
3222{
3223 ev_tstamp mn_prev = mn_now;
3224
3225 ev_now_update (EV_A);
3226 timers_reschedule (EV_A_ mn_now - mn_prev);
3227#if EV_PERIODIC_ENABLE
3228 /* TODO: really do this? */
3229 periodics_reschedule (EV_A);
3230#endif
3231}
3232
1273/*****************************************************************************/ 3233/*****************************************************************************/
3234/* singly-linked list management, used when the expected list length is short */
1274 3235
1275inline void 3236inline_size void
1276wlist_add (WL *head, WL elem) 3237wlist_add (WL *head, WL elem)
1277{ 3238{
1278 elem->next = *head; 3239 elem->next = *head;
1279 *head = elem; 3240 *head = elem;
1280} 3241}
1281 3242
1282inline void 3243inline_size void
1283wlist_del (WL *head, WL elem) 3244wlist_del (WL *head, WL elem)
1284{ 3245{
1285 while (*head) 3246 while (*head)
1286 { 3247 {
1287 if (*head == elem) 3248 if (expect_true (*head == elem))
1288 { 3249 {
1289 *head = elem->next; 3250 *head = elem->next;
1290 return; 3251 break;
1291 } 3252 }
1292 3253
1293 head = &(*head)->next; 3254 head = &(*head)->next;
1294 } 3255 }
1295} 3256}
1296 3257
3258/* internal, faster, version of ev_clear_pending */
1297inline void 3259inline_speed void
1298ev_clear_pending (EV_P_ W w) 3260clear_pending (EV_P_ W w)
1299{ 3261{
1300 if (w->pending) 3262 if (w->pending)
1301 { 3263 {
1302 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3264 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1303 w->pending = 0; 3265 w->pending = 0;
1304 } 3266 }
1305} 3267}
1306 3268
3269int
3270ev_clear_pending (EV_P_ void *w) EV_THROW
3271{
3272 W w_ = (W)w;
3273 int pending = w_->pending;
3274
3275 if (expect_true (pending))
3276 {
3277 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3278 p->w = (W)&pending_w;
3279 w_->pending = 0;
3280 return p->events;
3281 }
3282 else
3283 return 0;
3284}
3285
1307inline void 3286inline_size void
3287pri_adjust (EV_P_ W w)
3288{
3289 int pri = ev_priority (w);
3290 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3291 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3292 ev_set_priority (w, pri);
3293}
3294
3295inline_speed void
1308ev_start (EV_P_ W w, int active) 3296ev_start (EV_P_ W w, int active)
1309{ 3297{
1310 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 3298 pri_adjust (EV_A_ w);
1311 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1312
1313 w->active = active; 3299 w->active = active;
1314 ev_ref (EV_A); 3300 ev_ref (EV_A);
1315} 3301}
1316 3302
1317inline void 3303inline_size void
1318ev_stop (EV_P_ W w) 3304ev_stop (EV_P_ W w)
1319{ 3305{
1320 ev_unref (EV_A); 3306 ev_unref (EV_A);
1321 w->active = 0; 3307 w->active = 0;
1322} 3308}
1323 3309
1324/*****************************************************************************/ 3310/*****************************************************************************/
1325 3311
1326void 3312void noinline
1327ev_io_start (EV_P_ struct ev_io *w) 3313ev_io_start (EV_P_ ev_io *w) EV_THROW
1328{ 3314{
1329 int fd = w->fd; 3315 int fd = w->fd;
1330 3316
1331 if (expect_false (ev_is_active (w))) 3317 if (expect_false (ev_is_active (w)))
1332 return; 3318 return;
1333 3319
1334 assert (("ev_io_start called with negative fd", fd >= 0)); 3320 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3321 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3322
3323 EV_FREQUENT_CHECK;
1335 3324
1336 ev_start (EV_A_ (W)w, 1); 3325 ev_start (EV_A_ (W)w, 1);
1337 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3326 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1338 wlist_add ((WL *)&anfds[fd].head, (WL)w); 3327 wlist_add (&anfds[fd].head, (WL)w);
1339 3328
1340 fd_change (EV_A_ fd); 3329 /* common bug, apparently */
1341} 3330 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
1342 3331
1343void 3332 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3333 w->events &= ~EV__IOFDSET;
3334
3335 EV_FREQUENT_CHECK;
3336}
3337
3338void noinline
1344ev_io_stop (EV_P_ struct ev_io *w) 3339ev_io_stop (EV_P_ ev_io *w) EV_THROW
1345{ 3340{
1346 ev_clear_pending (EV_A_ (W)w); 3341 clear_pending (EV_A_ (W)w);
1347 if (expect_false (!ev_is_active (w))) 3342 if (expect_false (!ev_is_active (w)))
1348 return; 3343 return;
1349 3344
1350 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3345 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1351 3346
3347 EV_FREQUENT_CHECK;
3348
1352 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 3349 wlist_del (&anfds[w->fd].head, (WL)w);
1353 ev_stop (EV_A_ (W)w); 3350 ev_stop (EV_A_ (W)w);
1354 3351
1355 fd_change (EV_A_ w->fd); 3352 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1356}
1357 3353
1358void 3354 EV_FREQUENT_CHECK;
3355}
3356
3357void noinline
1359ev_timer_start (EV_P_ struct ev_timer *w) 3358ev_timer_start (EV_P_ ev_timer *w) EV_THROW
1360{ 3359{
1361 if (expect_false (ev_is_active (w))) 3360 if (expect_false (ev_is_active (w)))
1362 return; 3361 return;
1363 3362
1364 ((WT)w)->at += mn_now; 3363 ev_at (w) += mn_now;
1365 3364
1366 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3365 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1367 3366
3367 EV_FREQUENT_CHECK;
3368
3369 ++timercnt;
1368 ev_start (EV_A_ (W)w, ++timercnt); 3370 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1369 array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2); 3371 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1370 timers [timercnt - 1] = w; 3372 ANHE_w (timers [ev_active (w)]) = (WT)w;
1371 upheap ((WT *)timers, timercnt - 1); 3373 ANHE_at_cache (timers [ev_active (w)]);
3374 upheap (timers, ev_active (w));
1372 3375
3376 EV_FREQUENT_CHECK;
3377
1373 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 3378 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1374} 3379}
1375 3380
1376void 3381void noinline
1377ev_timer_stop (EV_P_ struct ev_timer *w) 3382ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
1378{ 3383{
1379 ev_clear_pending (EV_A_ (W)w); 3384 clear_pending (EV_A_ (W)w);
1380 if (expect_false (!ev_is_active (w))) 3385 if (expect_false (!ev_is_active (w)))
1381 return; 3386 return;
1382 3387
3388 EV_FREQUENT_CHECK;
3389
3390 {
3391 int active = ev_active (w);
3392
1383 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 3393 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1384 3394
3395 --timercnt;
3396
1385 if (expect_true (((W)w)->active < timercnt--)) 3397 if (expect_true (active < timercnt + HEAP0))
1386 { 3398 {
1387 timers [((W)w)->active - 1] = timers [timercnt]; 3399 timers [active] = timers [timercnt + HEAP0];
1388 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 3400 adjustheap (timers, timercnt, active);
1389 } 3401 }
3402 }
1390 3403
1391 ((WT)w)->at -= mn_now; 3404 ev_at (w) -= mn_now;
1392 3405
1393 ev_stop (EV_A_ (W)w); 3406 ev_stop (EV_A_ (W)w);
1394}
1395 3407
1396void 3408 EV_FREQUENT_CHECK;
3409}
3410
3411void noinline
1397ev_timer_again (EV_P_ struct ev_timer *w) 3412ev_timer_again (EV_P_ ev_timer *w) EV_THROW
1398{ 3413{
3414 EV_FREQUENT_CHECK;
3415
3416 clear_pending (EV_A_ (W)w);
3417
1399 if (ev_is_active (w)) 3418 if (ev_is_active (w))
1400 { 3419 {
1401 if (w->repeat) 3420 if (w->repeat)
1402 { 3421 {
1403 ((WT)w)->at = mn_now + w->repeat; 3422 ev_at (w) = mn_now + w->repeat;
3423 ANHE_at_cache (timers [ev_active (w)]);
1404 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 3424 adjustheap (timers, timercnt, ev_active (w));
1405 } 3425 }
1406 else 3426 else
1407 ev_timer_stop (EV_A_ w); 3427 ev_timer_stop (EV_A_ w);
1408 } 3428 }
1409 else if (w->repeat) 3429 else if (w->repeat)
1410 { 3430 {
1411 w->at = w->repeat; 3431 ev_at (w) = w->repeat;
1412 ev_timer_start (EV_A_ w); 3432 ev_timer_start (EV_A_ w);
1413 } 3433 }
1414}
1415 3434
3435 EV_FREQUENT_CHECK;
3436}
3437
3438ev_tstamp
3439ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3440{
3441 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3442}
3443
1416#if EV_PERIODICS 3444#if EV_PERIODIC_ENABLE
1417void 3445void noinline
1418ev_periodic_start (EV_P_ struct ev_periodic *w) 3446ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
1419{ 3447{
1420 if (expect_false (ev_is_active (w))) 3448 if (expect_false (ev_is_active (w)))
1421 return; 3449 return;
1422 3450
1423 if (w->reschedule_cb) 3451 if (w->reschedule_cb)
1424 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 3452 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1425 else if (w->interval) 3453 else if (w->interval)
1426 { 3454 {
1427 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3455 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1428 /* this formula differs from the one in periodic_reify because we do not always round up */ 3456 periodic_recalc (EV_A_ w);
1429 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1430 } 3457 }
3458 else
3459 ev_at (w) = w->offset;
1431 3460
3461 EV_FREQUENT_CHECK;
3462
3463 ++periodiccnt;
1432 ev_start (EV_A_ (W)w, ++periodiccnt); 3464 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1433 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 3465 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1434 periodics [periodiccnt - 1] = w; 3466 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1435 upheap ((WT *)periodics, periodiccnt - 1); 3467 ANHE_at_cache (periodics [ev_active (w)]);
3468 upheap (periodics, ev_active (w));
1436 3469
3470 EV_FREQUENT_CHECK;
3471
1437 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 3472 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1438} 3473}
1439 3474
1440void 3475void noinline
1441ev_periodic_stop (EV_P_ struct ev_periodic *w) 3476ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
1442{ 3477{
1443 ev_clear_pending (EV_A_ (W)w); 3478 clear_pending (EV_A_ (W)w);
1444 if (expect_false (!ev_is_active (w))) 3479 if (expect_false (!ev_is_active (w)))
1445 return; 3480 return;
1446 3481
3482 EV_FREQUENT_CHECK;
3483
3484 {
3485 int active = ev_active (w);
3486
1447 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 3487 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1448 3488
3489 --periodiccnt;
3490
1449 if (expect_true (((W)w)->active < periodiccnt--)) 3491 if (expect_true (active < periodiccnt + HEAP0))
1450 { 3492 {
1451 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 3493 periodics [active] = periodics [periodiccnt + HEAP0];
1452 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 3494 adjustheap (periodics, periodiccnt, active);
1453 } 3495 }
3496 }
1454 3497
1455 ev_stop (EV_A_ (W)w); 3498 ev_stop (EV_A_ (W)w);
1456}
1457 3499
1458void 3500 EV_FREQUENT_CHECK;
3501}
3502
3503void noinline
1459ev_periodic_again (EV_P_ struct ev_periodic *w) 3504ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
1460{ 3505{
1461 /* TODO: use adjustheap and recalculation */ 3506 /* TODO: use adjustheap and recalculation */
1462 ev_periodic_stop (EV_A_ w); 3507 ev_periodic_stop (EV_A_ w);
1463 ev_periodic_start (EV_A_ w); 3508 ev_periodic_start (EV_A_ w);
1464} 3509}
1465#endif 3510#endif
1466 3511
1467void 3512#ifndef SA_RESTART
1468ev_idle_start (EV_P_ struct ev_idle *w) 3513# define SA_RESTART 0
3514#endif
3515
3516#if EV_SIGNAL_ENABLE
3517
3518void noinline
3519ev_signal_start (EV_P_ ev_signal *w) EV_THROW
1469{ 3520{
1470 if (expect_false (ev_is_active (w))) 3521 if (expect_false (ev_is_active (w)))
1471 return; 3522 return;
1472 3523
3524 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3525
3526#if EV_MULTIPLICITY
3527 assert (("libev: a signal must not be attached to two different loops",
3528 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3529
3530 signals [w->signum - 1].loop = EV_A;
3531#endif
3532
3533 EV_FREQUENT_CHECK;
3534
3535#if EV_USE_SIGNALFD
3536 if (sigfd == -2)
3537 {
3538 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3539 if (sigfd < 0 && errno == EINVAL)
3540 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3541
3542 if (sigfd >= 0)
3543 {
3544 fd_intern (sigfd); /* doing it twice will not hurt */
3545
3546 sigemptyset (&sigfd_set);
3547
3548 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3549 ev_set_priority (&sigfd_w, EV_MAXPRI);
3550 ev_io_start (EV_A_ &sigfd_w);
3551 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3552 }
3553 }
3554
3555 if (sigfd >= 0)
3556 {
3557 /* TODO: check .head */
3558 sigaddset (&sigfd_set, w->signum);
3559 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3560
3561 signalfd (sigfd, &sigfd_set, 0);
3562 }
3563#endif
3564
1473 ev_start (EV_A_ (W)w, ++idlecnt); 3565 ev_start (EV_A_ (W)w, 1);
1474 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2); 3566 wlist_add (&signals [w->signum - 1].head, (WL)w);
1475 idles [idlecnt - 1] = w;
1476}
1477 3567
1478void 3568 if (!((WL)w)->next)
1479ev_idle_stop (EV_P_ struct ev_idle *w) 3569# if EV_USE_SIGNALFD
3570 if (sigfd < 0) /*TODO*/
3571# endif
3572 {
3573# ifdef _WIN32
3574 evpipe_init (EV_A);
3575
3576 signal (w->signum, ev_sighandler);
3577# else
3578 struct sigaction sa;
3579
3580 evpipe_init (EV_A);
3581
3582 sa.sa_handler = ev_sighandler;
3583 sigfillset (&sa.sa_mask);
3584 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3585 sigaction (w->signum, &sa, 0);
3586
3587 if (origflags & EVFLAG_NOSIGMASK)
3588 {
3589 sigemptyset (&sa.sa_mask);
3590 sigaddset (&sa.sa_mask, w->signum);
3591 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3592 }
3593#endif
3594 }
3595
3596 EV_FREQUENT_CHECK;
3597}
3598
3599void noinline
3600ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
1480{ 3601{
1481 ev_clear_pending (EV_A_ (W)w); 3602 clear_pending (EV_A_ (W)w);
1482 if (expect_false (!ev_is_active (w))) 3603 if (expect_false (!ev_is_active (w)))
1483 return; 3604 return;
1484 3605
1485 idles [((W)w)->active - 1] = idles [--idlecnt]; 3606 EV_FREQUENT_CHECK;
3607
3608 wlist_del (&signals [w->signum - 1].head, (WL)w);
1486 ev_stop (EV_A_ (W)w); 3609 ev_stop (EV_A_ (W)w);
3610
3611 if (!signals [w->signum - 1].head)
3612 {
3613#if EV_MULTIPLICITY
3614 signals [w->signum - 1].loop = 0; /* unattach from signal */
3615#endif
3616#if EV_USE_SIGNALFD
3617 if (sigfd >= 0)
3618 {
3619 sigset_t ss;
3620
3621 sigemptyset (&ss);
3622 sigaddset (&ss, w->signum);
3623 sigdelset (&sigfd_set, w->signum);
3624
3625 signalfd (sigfd, &sigfd_set, 0);
3626 sigprocmask (SIG_UNBLOCK, &ss, 0);
3627 }
3628 else
3629#endif
3630 signal (w->signum, SIG_DFL);
3631 }
3632
3633 EV_FREQUENT_CHECK;
1487} 3634}
3635
3636#endif
3637
3638#if EV_CHILD_ENABLE
1488 3639
1489void 3640void
1490ev_prepare_start (EV_P_ struct ev_prepare *w) 3641ev_child_start (EV_P_ ev_child *w) EV_THROW
1491{ 3642{
3643#if EV_MULTIPLICITY
3644 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3645#endif
1492 if (expect_false (ev_is_active (w))) 3646 if (expect_false (ev_is_active (w)))
1493 return; 3647 return;
1494 3648
3649 EV_FREQUENT_CHECK;
3650
1495 ev_start (EV_A_ (W)w, ++preparecnt); 3651 ev_start (EV_A_ (W)w, 1);
1496 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 3652 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1497 prepares [preparecnt - 1] = w; 3653
3654 EV_FREQUENT_CHECK;
1498} 3655}
1499 3656
1500void 3657void
1501ev_prepare_stop (EV_P_ struct ev_prepare *w) 3658ev_child_stop (EV_P_ ev_child *w) EV_THROW
1502{ 3659{
1503 ev_clear_pending (EV_A_ (W)w); 3660 clear_pending (EV_A_ (W)w);
1504 if (expect_false (!ev_is_active (w))) 3661 if (expect_false (!ev_is_active (w)))
1505 return; 3662 return;
1506 3663
1507 prepares [((W)w)->active - 1] = prepares [--preparecnt]; 3664 EV_FREQUENT_CHECK;
3665
3666 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1508 ev_stop (EV_A_ (W)w); 3667 ev_stop (EV_A_ (W)w);
3668
3669 EV_FREQUENT_CHECK;
1509} 3670}
3671
3672#endif
3673
3674#if EV_STAT_ENABLE
3675
3676# ifdef _WIN32
3677# undef lstat
3678# define lstat(a,b) _stati64 (a,b)
3679# endif
3680
3681#define DEF_STAT_INTERVAL 5.0074891
3682#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3683#define MIN_STAT_INTERVAL 0.1074891
3684
3685static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3686
3687#if EV_USE_INOTIFY
3688
3689/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3690# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3691
3692static void noinline
3693infy_add (EV_P_ ev_stat *w)
3694{
3695 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
3696
3697 if (w->wd >= 0)
3698 {
3699 struct statfs sfs;
3700
3701 /* now local changes will be tracked by inotify, but remote changes won't */
3702 /* unless the filesystem is known to be local, we therefore still poll */
3703 /* also do poll on <2.6.25, but with normal frequency */
3704
3705 if (!fs_2625)
3706 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3707 else if (!statfs (w->path, &sfs)
3708 && (sfs.f_type == 0x1373 /* devfs */
3709 || sfs.f_type == 0xEF53 /* ext2/3 */
3710 || sfs.f_type == 0x3153464a /* jfs */
3711 || sfs.f_type == 0x52654973 /* reiser3 */
3712 || sfs.f_type == 0x01021994 /* tempfs */
3713 || sfs.f_type == 0x58465342 /* xfs */))
3714 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3715 else
3716 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3717 }
3718 else
3719 {
3720 /* can't use inotify, continue to stat */
3721 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3722
3723 /* if path is not there, monitor some parent directory for speedup hints */
3724 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3725 /* but an efficiency issue only */
3726 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
3727 {
3728 char path [4096];
3729 strcpy (path, w->path);
3730
3731 do
3732 {
3733 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
3734 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
3735
3736 char *pend = strrchr (path, '/');
3737
3738 if (!pend || pend == path)
3739 break;
3740
3741 *pend = 0;
3742 w->wd = inotify_add_watch (fs_fd, path, mask);
3743 }
3744 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3745 }
3746 }
3747
3748 if (w->wd >= 0)
3749 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3750
3751 /* now re-arm timer, if required */
3752 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3753 ev_timer_again (EV_A_ &w->timer);
3754 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3755}
3756
3757static void noinline
3758infy_del (EV_P_ ev_stat *w)
3759{
3760 int slot;
3761 int wd = w->wd;
3762
3763 if (wd < 0)
3764 return;
3765
3766 w->wd = -2;
3767 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3768 wlist_del (&fs_hash [slot].head, (WL)w);
3769
3770 /* remove this watcher, if others are watching it, they will rearm */
3771 inotify_rm_watch (fs_fd, wd);
3772}
3773
3774static void noinline
3775infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3776{
3777 if (slot < 0)
3778 /* overflow, need to check for all hash slots */
3779 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3780 infy_wd (EV_A_ slot, wd, ev);
3781 else
3782 {
3783 WL w_;
3784
3785 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3786 {
3787 ev_stat *w = (ev_stat *)w_;
3788 w_ = w_->next; /* lets us remove this watcher and all before it */
3789
3790 if (w->wd == wd || wd == -1)
3791 {
3792 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3793 {
3794 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3795 w->wd = -1;
3796 infy_add (EV_A_ w); /* re-add, no matter what */
3797 }
3798
3799 stat_timer_cb (EV_A_ &w->timer, 0);
3800 }
3801 }
3802 }
3803}
3804
3805static void
3806infy_cb (EV_P_ ev_io *w, int revents)
3807{
3808 char buf [EV_INOTIFY_BUFSIZE];
3809 int ofs;
3810 int len = read (fs_fd, buf, sizeof (buf));
3811
3812 for (ofs = 0; ofs < len; )
3813 {
3814 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3815 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3816 ofs += sizeof (struct inotify_event) + ev->len;
3817 }
3818}
3819
3820inline_size void ecb_cold
3821ev_check_2625 (EV_P)
3822{
3823 /* kernels < 2.6.25 are borked
3824 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3825 */
3826 if (ev_linux_version () < 0x020619)
3827 return;
3828
3829 fs_2625 = 1;
3830}
3831
3832inline_size int
3833infy_newfd (void)
3834{
3835#if defined IN_CLOEXEC && defined IN_NONBLOCK
3836 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3837 if (fd >= 0)
3838 return fd;
3839#endif
3840 return inotify_init ();
3841}
3842
3843inline_size void
3844infy_init (EV_P)
3845{
3846 if (fs_fd != -2)
3847 return;
3848
3849 fs_fd = -1;
3850
3851 ev_check_2625 (EV_A);
3852
3853 fs_fd = infy_newfd ();
3854
3855 if (fs_fd >= 0)
3856 {
3857 fd_intern (fs_fd);
3858 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3859 ev_set_priority (&fs_w, EV_MAXPRI);
3860 ev_io_start (EV_A_ &fs_w);
3861 ev_unref (EV_A);
3862 }
3863}
3864
3865inline_size void
3866infy_fork (EV_P)
3867{
3868 int slot;
3869
3870 if (fs_fd < 0)
3871 return;
3872
3873 ev_ref (EV_A);
3874 ev_io_stop (EV_A_ &fs_w);
3875 close (fs_fd);
3876 fs_fd = infy_newfd ();
3877
3878 if (fs_fd >= 0)
3879 {
3880 fd_intern (fs_fd);
3881 ev_io_set (&fs_w, fs_fd, EV_READ);
3882 ev_io_start (EV_A_ &fs_w);
3883 ev_unref (EV_A);
3884 }
3885
3886 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3887 {
3888 WL w_ = fs_hash [slot].head;
3889 fs_hash [slot].head = 0;
3890
3891 while (w_)
3892 {
3893 ev_stat *w = (ev_stat *)w_;
3894 w_ = w_->next; /* lets us add this watcher */
3895
3896 w->wd = -1;
3897
3898 if (fs_fd >= 0)
3899 infy_add (EV_A_ w); /* re-add, no matter what */
3900 else
3901 {
3902 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3903 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3904 ev_timer_again (EV_A_ &w->timer);
3905 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3906 }
3907 }
3908 }
3909}
3910
3911#endif
3912
3913#ifdef _WIN32
3914# define EV_LSTAT(p,b) _stati64 (p, b)
3915#else
3916# define EV_LSTAT(p,b) lstat (p, b)
3917#endif
1510 3918
1511void 3919void
1512ev_check_start (EV_P_ struct ev_check *w) 3920ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3921{
3922 if (lstat (w->path, &w->attr) < 0)
3923 w->attr.st_nlink = 0;
3924 else if (!w->attr.st_nlink)
3925 w->attr.st_nlink = 1;
3926}
3927
3928static void noinline
3929stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3930{
3931 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3932
3933 ev_statdata prev = w->attr;
3934 ev_stat_stat (EV_A_ w);
3935
3936 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3937 if (
3938 prev.st_dev != w->attr.st_dev
3939 || prev.st_ino != w->attr.st_ino
3940 || prev.st_mode != w->attr.st_mode
3941 || prev.st_nlink != w->attr.st_nlink
3942 || prev.st_uid != w->attr.st_uid
3943 || prev.st_gid != w->attr.st_gid
3944 || prev.st_rdev != w->attr.st_rdev
3945 || prev.st_size != w->attr.st_size
3946 || prev.st_atime != w->attr.st_atime
3947 || prev.st_mtime != w->attr.st_mtime
3948 || prev.st_ctime != w->attr.st_ctime
3949 ) {
3950 /* we only update w->prev on actual differences */
3951 /* in case we test more often than invoke the callback, */
3952 /* to ensure that prev is always different to attr */
3953 w->prev = prev;
3954
3955 #if EV_USE_INOTIFY
3956 if (fs_fd >= 0)
3957 {
3958 infy_del (EV_A_ w);
3959 infy_add (EV_A_ w);
3960 ev_stat_stat (EV_A_ w); /* avoid race... */
3961 }
3962 #endif
3963
3964 ev_feed_event (EV_A_ w, EV_STAT);
3965 }
3966}
3967
3968void
3969ev_stat_start (EV_P_ ev_stat *w) EV_THROW
1513{ 3970{
1514 if (expect_false (ev_is_active (w))) 3971 if (expect_false (ev_is_active (w)))
1515 return; 3972 return;
1516 3973
3974 ev_stat_stat (EV_A_ w);
3975
3976 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3977 w->interval = MIN_STAT_INTERVAL;
3978
3979 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3980 ev_set_priority (&w->timer, ev_priority (w));
3981
3982#if EV_USE_INOTIFY
3983 infy_init (EV_A);
3984
3985 if (fs_fd >= 0)
3986 infy_add (EV_A_ w);
3987 else
3988#endif
3989 {
3990 ev_timer_again (EV_A_ &w->timer);
3991 ev_unref (EV_A);
3992 }
3993
1517 ev_start (EV_A_ (W)w, ++checkcnt); 3994 ev_start (EV_A_ (W)w, 1);
1518 array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2); 3995
1519 checks [checkcnt - 1] = w; 3996 EV_FREQUENT_CHECK;
1520} 3997}
1521 3998
1522void 3999void
1523ev_check_stop (EV_P_ struct ev_check *w) 4000ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
1524{ 4001{
1525 ev_clear_pending (EV_A_ (W)w); 4002 clear_pending (EV_A_ (W)w);
1526 if (expect_false (!ev_is_active (w))) 4003 if (expect_false (!ev_is_active (w)))
1527 return; 4004 return;
1528 4005
1529 checks [((W)w)->active - 1] = checks [--checkcnt]; 4006 EV_FREQUENT_CHECK;
4007
4008#if EV_USE_INOTIFY
4009 infy_del (EV_A_ w);
4010#endif
4011
4012 if (ev_is_active (&w->timer))
4013 {
4014 ev_ref (EV_A);
4015 ev_timer_stop (EV_A_ &w->timer);
4016 }
4017
1530 ev_stop (EV_A_ (W)w); 4018 ev_stop (EV_A_ (W)w);
1531}
1532 4019
1533#ifndef SA_RESTART 4020 EV_FREQUENT_CHECK;
1534# define SA_RESTART 0 4021}
1535#endif 4022#endif
1536 4023
4024#if EV_IDLE_ENABLE
1537void 4025void
1538ev_signal_start (EV_P_ struct ev_signal *w) 4026ev_idle_start (EV_P_ ev_idle *w) EV_THROW
1539{ 4027{
1540#if EV_MULTIPLICITY
1541 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1542#endif
1543 if (expect_false (ev_is_active (w))) 4028 if (expect_false (ev_is_active (w)))
1544 return; 4029 return;
1545 4030
1546 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 4031 pri_adjust (EV_A_ (W)w);
1547 4032
4033 EV_FREQUENT_CHECK;
4034
4035 {
4036 int active = ++idlecnt [ABSPRI (w)];
4037
4038 ++idleall;
1548 ev_start (EV_A_ (W)w, 1); 4039 ev_start (EV_A_ (W)w, active);
1549 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1550 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1551 4040
1552 if (!((WL)w)->next) 4041 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
1553 { 4042 idles [ABSPRI (w)][active - 1] = w;
1554#if _WIN32
1555 signal (w->signum, sighandler);
1556#else
1557 struct sigaction sa;
1558 sa.sa_handler = sighandler;
1559 sigfillset (&sa.sa_mask);
1560 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1561 sigaction (w->signum, &sa, 0);
1562#endif
1563 } 4043 }
4044
4045 EV_FREQUENT_CHECK;
1564} 4046}
1565 4047
1566void 4048void
1567ev_signal_stop (EV_P_ struct ev_signal *w) 4049ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
1568{ 4050{
1569 ev_clear_pending (EV_A_ (W)w); 4051 clear_pending (EV_A_ (W)w);
1570 if (expect_false (!ev_is_active (w))) 4052 if (expect_false (!ev_is_active (w)))
1571 return; 4053 return;
1572 4054
1573 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 4055 EV_FREQUENT_CHECK;
4056
4057 {
4058 int active = ev_active (w);
4059
4060 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
4061 ev_active (idles [ABSPRI (w)][active - 1]) = active;
4062
1574 ev_stop (EV_A_ (W)w); 4063 ev_stop (EV_A_ (W)w);
4064 --idleall;
4065 }
1575 4066
1576 if (!signals [w->signum - 1].head) 4067 EV_FREQUENT_CHECK;
1577 signal (w->signum, SIG_DFL);
1578} 4068}
4069#endif
1579 4070
4071#if EV_PREPARE_ENABLE
1580void 4072void
1581ev_child_start (EV_P_ struct ev_child *w) 4073ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
1582{ 4074{
1583#if EV_MULTIPLICITY
1584 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1585#endif
1586 if (expect_false (ev_is_active (w))) 4075 if (expect_false (ev_is_active (w)))
1587 return; 4076 return;
1588 4077
4078 EV_FREQUENT_CHECK;
4079
1589 ev_start (EV_A_ (W)w, 1); 4080 ev_start (EV_A_ (W)w, ++preparecnt);
1590 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 4081 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
4082 prepares [preparecnt - 1] = w;
4083
4084 EV_FREQUENT_CHECK;
1591} 4085}
1592 4086
1593void 4087void
1594ev_child_stop (EV_P_ struct ev_child *w) 4088ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
1595{ 4089{
1596 ev_clear_pending (EV_A_ (W)w); 4090 clear_pending (EV_A_ (W)w);
1597 if (expect_false (!ev_is_active (w))) 4091 if (expect_false (!ev_is_active (w)))
1598 return; 4092 return;
1599 4093
1600 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 4094 EV_FREQUENT_CHECK;
4095
4096 {
4097 int active = ev_active (w);
4098
4099 prepares [active - 1] = prepares [--preparecnt];
4100 ev_active (prepares [active - 1]) = active;
4101 }
4102
1601 ev_stop (EV_A_ (W)w); 4103 ev_stop (EV_A_ (W)w);
4104
4105 EV_FREQUENT_CHECK;
1602} 4106}
4107#endif
4108
4109#if EV_CHECK_ENABLE
4110void
4111ev_check_start (EV_P_ ev_check *w) EV_THROW
4112{
4113 if (expect_false (ev_is_active (w)))
4114 return;
4115
4116 EV_FREQUENT_CHECK;
4117
4118 ev_start (EV_A_ (W)w, ++checkcnt);
4119 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
4120 checks [checkcnt - 1] = w;
4121
4122 EV_FREQUENT_CHECK;
4123}
4124
4125void
4126ev_check_stop (EV_P_ ev_check *w) EV_THROW
4127{
4128 clear_pending (EV_A_ (W)w);
4129 if (expect_false (!ev_is_active (w)))
4130 return;
4131
4132 EV_FREQUENT_CHECK;
4133
4134 {
4135 int active = ev_active (w);
4136
4137 checks [active - 1] = checks [--checkcnt];
4138 ev_active (checks [active - 1]) = active;
4139 }
4140
4141 ev_stop (EV_A_ (W)w);
4142
4143 EV_FREQUENT_CHECK;
4144}
4145#endif
4146
4147#if EV_EMBED_ENABLE
4148void noinline
4149ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
4150{
4151 ev_run (w->other, EVRUN_NOWAIT);
4152}
4153
4154static void
4155embed_io_cb (EV_P_ ev_io *io, int revents)
4156{
4157 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
4158
4159 if (ev_cb (w))
4160 ev_feed_event (EV_A_ (W)w, EV_EMBED);
4161 else
4162 ev_run (w->other, EVRUN_NOWAIT);
4163}
4164
4165static void
4166embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4167{
4168 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4169
4170 {
4171 EV_P = w->other;
4172
4173 while (fdchangecnt)
4174 {
4175 fd_reify (EV_A);
4176 ev_run (EV_A_ EVRUN_NOWAIT);
4177 }
4178 }
4179}
4180
4181static void
4182embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4183{
4184 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4185
4186 ev_embed_stop (EV_A_ w);
4187
4188 {
4189 EV_P = w->other;
4190
4191 ev_loop_fork (EV_A);
4192 ev_run (EV_A_ EVRUN_NOWAIT);
4193 }
4194
4195 ev_embed_start (EV_A_ w);
4196}
4197
4198#if 0
4199static void
4200embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4201{
4202 ev_idle_stop (EV_A_ idle);
4203}
4204#endif
4205
4206void
4207ev_embed_start (EV_P_ ev_embed *w) EV_THROW
4208{
4209 if (expect_false (ev_is_active (w)))
4210 return;
4211
4212 {
4213 EV_P = w->other;
4214 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4215 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4216 }
4217
4218 EV_FREQUENT_CHECK;
4219
4220 ev_set_priority (&w->io, ev_priority (w));
4221 ev_io_start (EV_A_ &w->io);
4222
4223 ev_prepare_init (&w->prepare, embed_prepare_cb);
4224 ev_set_priority (&w->prepare, EV_MINPRI);
4225 ev_prepare_start (EV_A_ &w->prepare);
4226
4227 ev_fork_init (&w->fork, embed_fork_cb);
4228 ev_fork_start (EV_A_ &w->fork);
4229
4230 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4231
4232 ev_start (EV_A_ (W)w, 1);
4233
4234 EV_FREQUENT_CHECK;
4235}
4236
4237void
4238ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
4239{
4240 clear_pending (EV_A_ (W)w);
4241 if (expect_false (!ev_is_active (w)))
4242 return;
4243
4244 EV_FREQUENT_CHECK;
4245
4246 ev_io_stop (EV_A_ &w->io);
4247 ev_prepare_stop (EV_A_ &w->prepare);
4248 ev_fork_stop (EV_A_ &w->fork);
4249
4250 ev_stop (EV_A_ (W)w);
4251
4252 EV_FREQUENT_CHECK;
4253}
4254#endif
4255
4256#if EV_FORK_ENABLE
4257void
4258ev_fork_start (EV_P_ ev_fork *w) EV_THROW
4259{
4260 if (expect_false (ev_is_active (w)))
4261 return;
4262
4263 EV_FREQUENT_CHECK;
4264
4265 ev_start (EV_A_ (W)w, ++forkcnt);
4266 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4267 forks [forkcnt - 1] = w;
4268
4269 EV_FREQUENT_CHECK;
4270}
4271
4272void
4273ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
4274{
4275 clear_pending (EV_A_ (W)w);
4276 if (expect_false (!ev_is_active (w)))
4277 return;
4278
4279 EV_FREQUENT_CHECK;
4280
4281 {
4282 int active = ev_active (w);
4283
4284 forks [active - 1] = forks [--forkcnt];
4285 ev_active (forks [active - 1]) = active;
4286 }
4287
4288 ev_stop (EV_A_ (W)w);
4289
4290 EV_FREQUENT_CHECK;
4291}
4292#endif
4293
4294#if EV_CLEANUP_ENABLE
4295void
4296ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4297{
4298 if (expect_false (ev_is_active (w)))
4299 return;
4300
4301 EV_FREQUENT_CHECK;
4302
4303 ev_start (EV_A_ (W)w, ++cleanupcnt);
4304 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4305 cleanups [cleanupcnt - 1] = w;
4306
4307 /* cleanup watchers should never keep a refcount on the loop */
4308 ev_unref (EV_A);
4309 EV_FREQUENT_CHECK;
4310}
4311
4312void
4313ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4314{
4315 clear_pending (EV_A_ (W)w);
4316 if (expect_false (!ev_is_active (w)))
4317 return;
4318
4319 EV_FREQUENT_CHECK;
4320 ev_ref (EV_A);
4321
4322 {
4323 int active = ev_active (w);
4324
4325 cleanups [active - 1] = cleanups [--cleanupcnt];
4326 ev_active (cleanups [active - 1]) = active;
4327 }
4328
4329 ev_stop (EV_A_ (W)w);
4330
4331 EV_FREQUENT_CHECK;
4332}
4333#endif
4334
4335#if EV_ASYNC_ENABLE
4336void
4337ev_async_start (EV_P_ ev_async *w) EV_THROW
4338{
4339 if (expect_false (ev_is_active (w)))
4340 return;
4341
4342 w->sent = 0;
4343
4344 evpipe_init (EV_A);
4345
4346 EV_FREQUENT_CHECK;
4347
4348 ev_start (EV_A_ (W)w, ++asynccnt);
4349 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4350 asyncs [asynccnt - 1] = w;
4351
4352 EV_FREQUENT_CHECK;
4353}
4354
4355void
4356ev_async_stop (EV_P_ ev_async *w) EV_THROW
4357{
4358 clear_pending (EV_A_ (W)w);
4359 if (expect_false (!ev_is_active (w)))
4360 return;
4361
4362 EV_FREQUENT_CHECK;
4363
4364 {
4365 int active = ev_active (w);
4366
4367 asyncs [active - 1] = asyncs [--asynccnt];
4368 ev_active (asyncs [active - 1]) = active;
4369 }
4370
4371 ev_stop (EV_A_ (W)w);
4372
4373 EV_FREQUENT_CHECK;
4374}
4375
4376void
4377ev_async_send (EV_P_ ev_async *w) EV_THROW
4378{
4379 w->sent = 1;
4380 evpipe_write (EV_A_ &async_pending);
4381}
4382#endif
1603 4383
1604/*****************************************************************************/ 4384/*****************************************************************************/
1605 4385
1606struct ev_once 4386struct ev_once
1607{ 4387{
1608 struct ev_io io; 4388 ev_io io;
1609 struct ev_timer to; 4389 ev_timer to;
1610 void (*cb)(int revents, void *arg); 4390 void (*cb)(int revents, void *arg);
1611 void *arg; 4391 void *arg;
1612}; 4392};
1613 4393
1614static void 4394static void
1615once_cb (EV_P_ struct ev_once *once, int revents) 4395once_cb (EV_P_ struct ev_once *once, int revents)
1616{ 4396{
1617 void (*cb)(int revents, void *arg) = once->cb; 4397 void (*cb)(int revents, void *arg) = once->cb;
1618 void *arg = once->arg; 4398 void *arg = once->arg;
1619 4399
1620 ev_io_stop (EV_A_ &once->io); 4400 ev_io_stop (EV_A_ &once->io);
1621 ev_timer_stop (EV_A_ &once->to); 4401 ev_timer_stop (EV_A_ &once->to);
1622 ev_free (once); 4402 ev_free (once);
1623 4403
1624 cb (revents, arg); 4404 cb (revents, arg);
1625} 4405}
1626 4406
1627static void 4407static void
1628once_cb_io (EV_P_ struct ev_io *w, int revents) 4408once_cb_io (EV_P_ ev_io *w, int revents)
1629{ 4409{
1630 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4410 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4411
4412 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1631} 4413}
1632 4414
1633static void 4415static void
1634once_cb_to (EV_P_ struct ev_timer *w, int revents) 4416once_cb_to (EV_P_ ev_timer *w, int revents)
1635{ 4417{
1636 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4418 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4419
4420 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1637} 4421}
1638 4422
1639void 4423void
1640ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4424ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
1641{ 4425{
1642 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4426 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1643 4427
1644 if (expect_false (!once)) 4428 if (expect_false (!once))
1645 { 4429 {
1646 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4430 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1647 return; 4431 return;
1648 } 4432 }
1649 4433
1650 once->cb = cb; 4434 once->cb = cb;
1651 once->arg = arg; 4435 once->arg = arg;
… …
1663 ev_timer_set (&once->to, timeout, 0.); 4447 ev_timer_set (&once->to, timeout, 0.);
1664 ev_timer_start (EV_A_ &once->to); 4448 ev_timer_start (EV_A_ &once->to);
1665 } 4449 }
1666} 4450}
1667 4451
1668#ifdef __cplusplus 4452/*****************************************************************************/
1669} 4453
4454#if EV_WALK_ENABLE
4455void ecb_cold
4456ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4457{
4458 int i, j;
4459 ev_watcher_list *wl, *wn;
4460
4461 if (types & (EV_IO | EV_EMBED))
4462 for (i = 0; i < anfdmax; ++i)
4463 for (wl = anfds [i].head; wl; )
4464 {
4465 wn = wl->next;
4466
4467#if EV_EMBED_ENABLE
4468 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4469 {
4470 if (types & EV_EMBED)
4471 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4472 }
4473 else
4474#endif
4475#if EV_USE_INOTIFY
4476 if (ev_cb ((ev_io *)wl) == infy_cb)
4477 ;
4478 else
4479#endif
4480 if ((ev_io *)wl != &pipe_w)
4481 if (types & EV_IO)
4482 cb (EV_A_ EV_IO, wl);
4483
4484 wl = wn;
4485 }
4486
4487 if (types & (EV_TIMER | EV_STAT))
4488 for (i = timercnt + HEAP0; i-- > HEAP0; )
4489#if EV_STAT_ENABLE
4490 /*TODO: timer is not always active*/
4491 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4492 {
4493 if (types & EV_STAT)
4494 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4495 }
4496 else
4497#endif
4498 if (types & EV_TIMER)
4499 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4500
4501#if EV_PERIODIC_ENABLE
4502 if (types & EV_PERIODIC)
4503 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4504 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4505#endif
4506
4507#if EV_IDLE_ENABLE
4508 if (types & EV_IDLE)
4509 for (j = NUMPRI; j--; )
4510 for (i = idlecnt [j]; i--; )
4511 cb (EV_A_ EV_IDLE, idles [j][i]);
4512#endif
4513
4514#if EV_FORK_ENABLE
4515 if (types & EV_FORK)
4516 for (i = forkcnt; i--; )
4517 if (ev_cb (forks [i]) != embed_fork_cb)
4518 cb (EV_A_ EV_FORK, forks [i]);
4519#endif
4520
4521#if EV_ASYNC_ENABLE
4522 if (types & EV_ASYNC)
4523 for (i = asynccnt; i--; )
4524 cb (EV_A_ EV_ASYNC, asyncs [i]);
4525#endif
4526
4527#if EV_PREPARE_ENABLE
4528 if (types & EV_PREPARE)
4529 for (i = preparecnt; i--; )
4530# if EV_EMBED_ENABLE
4531 if (ev_cb (prepares [i]) != embed_prepare_cb)
1670#endif 4532# endif
4533 cb (EV_A_ EV_PREPARE, prepares [i]);
4534#endif
1671 4535
4536#if EV_CHECK_ENABLE
4537 if (types & EV_CHECK)
4538 for (i = checkcnt; i--; )
4539 cb (EV_A_ EV_CHECK, checks [i]);
4540#endif
4541
4542#if EV_SIGNAL_ENABLE
4543 if (types & EV_SIGNAL)
4544 for (i = 0; i < EV_NSIG - 1; ++i)
4545 for (wl = signals [i].head; wl; )
4546 {
4547 wn = wl->next;
4548 cb (EV_A_ EV_SIGNAL, wl);
4549 wl = wn;
4550 }
4551#endif
4552
4553#if EV_CHILD_ENABLE
4554 if (types & EV_CHILD)
4555 for (i = (EV_PID_HASHSIZE); i--; )
4556 for (wl = childs [i]; wl; )
4557 {
4558 wn = wl->next;
4559 cb (EV_A_ EV_CHILD, wl);
4560 wl = wn;
4561 }
4562#endif
4563/* EV_STAT 0x00001000 /* stat data changed */
4564/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4565}
4566#endif
4567
4568#if EV_MULTIPLICITY
4569 #include "ev_wrap.h"
4570#endif
4571

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