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Comparing libev/ev.c (file contents):
Revision 1.117 by ayin, Thu Nov 15 17:15:56 2007 UTC vs.
Revision 1.437 by root, Tue May 29 21:03:22 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
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
121# ifndef EV_USE_KQUEUE
122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
64#endif 127# endif
128
129# if HAVE_PORT_H && HAVE_PORT_CREATE
130# ifndef EV_USE_PORT
131# define EV_USE_PORT EV_FEATURE_BACKENDS
132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
136# endif
65 137
66#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
67#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
68#include <fcntl.h> 169#include <fcntl.h>
69#include <stddef.h> 170#include <stddef.h>
70 171
71#include <stdio.h> 172#include <stdio.h>
72 173
73#include <assert.h> 174#include <assert.h>
74#include <errno.h> 175#include <errno.h>
75#include <sys/types.h> 176#include <sys/types.h>
76#include <time.h> 177#include <time.h>
178#include <limits.h>
77 179
78#include <signal.h> 180#include <signal.h>
79 181
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
80#ifndef _WIN32 199#ifndef _WIN32
81# include <unistd.h>
82# include <sys/time.h> 200# include <sys/time.h>
83# include <sys/wait.h> 201# include <sys/wait.h>
202# include <unistd.h>
84#else 203#else
204# include <io.h>
85# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
86# include <windows.h> 207# include <windows.h>
87# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
88# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
89# 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
90#endif 261# endif
91 262#endif
92/**/
93 263
94#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
95# define EV_USE_MONOTONIC 1 268# define EV_USE_MONOTONIC 0
269# endif
270#endif
271
272#ifndef EV_USE_REALTIME
273# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
274#endif
275
276#ifndef EV_USE_NANOSLEEP
277# if _POSIX_C_SOURCE >= 199309L
278# define EV_USE_NANOSLEEP EV_FEATURE_OS
279# else
280# define EV_USE_NANOSLEEP 0
281# endif
96#endif 282#endif
97 283
98#ifndef EV_USE_SELECT 284#ifndef EV_USE_SELECT
99# define EV_USE_SELECT 1 285# define EV_USE_SELECT EV_FEATURE_BACKENDS
100# define EV_SELECT_USE_FD_SET 1
101#endif 286#endif
102 287
103#ifndef EV_USE_POLL 288#ifndef EV_USE_POLL
104# ifdef _WIN32 289# ifdef _WIN32
105# define EV_USE_POLL 0 290# define EV_USE_POLL 0
106# else 291# else
107# define EV_USE_POLL 1 292# define EV_USE_POLL EV_FEATURE_BACKENDS
108# endif 293# endif
109#endif 294#endif
110 295
111#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
112# define EV_USE_EPOLL 0 300# define EV_USE_EPOLL 0
301# endif
113#endif 302#endif
114 303
115#ifndef EV_USE_KQUEUE 304#ifndef EV_USE_KQUEUE
116# define EV_USE_KQUEUE 0 305# define EV_USE_KQUEUE 0
117#endif 306#endif
118 307
119#ifndef EV_USE_REALTIME 308#ifndef EV_USE_PORT
120# define EV_USE_REALTIME 1 309# define EV_USE_PORT 0
310#endif
311
312#ifndef EV_USE_INOTIFY
313# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
314# define EV_USE_INOTIFY EV_FEATURE_OS
315# else
316# define EV_USE_INOTIFY 0
121#endif 317# endif
318#endif
122 319
123/**/ 320#ifndef EV_PID_HASHSIZE
321# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
322#endif
124 323
125/* darwin simply cannot be helped */ 324#ifndef EV_INOTIFY_HASHSIZE
126#ifdef __APPLE__ 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 */
127# undef EV_USE_POLL 380# undef EV_USE_POLL
128# undef EV_USE_KQUEUE 381# define EV_USE_POLL 0
129#endif 382#endif
130 383
131#ifndef CLOCK_MONOTONIC 384#ifndef CLOCK_MONOTONIC
132# undef EV_USE_MONOTONIC 385# undef EV_USE_MONOTONIC
133# define EV_USE_MONOTONIC 0 386# define EV_USE_MONOTONIC 0
… …
136#ifndef CLOCK_REALTIME 389#ifndef CLOCK_REALTIME
137# undef EV_USE_REALTIME 390# undef EV_USE_REALTIME
138# define EV_USE_REALTIME 0 391# define EV_USE_REALTIME 0
139#endif 392#endif
140 393
141#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 */
142# 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};
143#endif 452#endif
144 453
145/**/ 454/**/
146 455
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 */
468
147#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) */
148#define MAX_BLOCKTIME 59.731 /* 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) */
149#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
150/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
151 471
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
152#ifdef EV_H 506#ifndef ECB_H
153# 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;
154#else 536#else
155# include "ev.h" 537 #include <inttypes.h>
538 #if UINTMAX_MAX > 0xffffffffU
539 #define ECB_PTRSIZE 8
540 #else
541 #define ECB_PTRSIZE 4
156#endif 542 #endif
543#endif
157 544
158#if __GNUC__ >= 3 545/* many compilers define _GNUC_ to some versions but then only implement
159# define expect(expr,value) __builtin_expect ((expr),(value)) 546 * what their idiot authors think are the "more important" extensions,
160# define inline 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_CPP98 (__cplusplus >= 199711L)
565#define ECB_CPP11 (__cplusplus >= 201103L)
566
567/*****************************************************************************/
568
569/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
570/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
571
572#if ECB_NO_THREADS
573# define ECB_NO_SMP 1
574#endif
575
576#if ECB_NO_SMP
577 #define ECB_MEMORY_FENCE do { } while (0)
578#endif
579
580#ifndef ECB_MEMORY_FENCE
581 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
582 #if __i386 || __i386__
583 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
584 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
585 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
586 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
587 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
588 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
589 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
590 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
591 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
592 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
593 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
594 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
595 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
596 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
597 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
598 #elif __sparc || __sparc__
599 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
600 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
601 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
602 #elif defined __s390__ || defined __s390x__
603 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
604 #elif defined __mips__
605 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
606 #elif defined __alpha__
607 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
608 #elif defined __hppa__
609 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
610 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
611 #elif defined __ia64__
612 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
613 #endif
614 #endif
615#endif
616
617#ifndef ECB_MEMORY_FENCE
618 #if ECB_GCC_VERSION(4,7)
619 /* see comment below about the C11 memory model. in short - avoid */
620 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
621 #elif defined __clang && __has_feature (cxx_atomic)
622 /* see above */
623 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
624 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
625 #define ECB_MEMORY_FENCE __sync_synchronize ()
626 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
627 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
628 #elif _MSC_VER >= 1400 /* VC++ 2005 */
629 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
630 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
631 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
632 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
633 #elif defined _WIN32
634 #include <WinNT.h>
635 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
636 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
637 #include <mbarrier.h>
638 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
639 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
640 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
641 #elif __xlC__
642 #define ECB_MEMORY_FENCE __sync ()
643 #endif
644#endif
645
646#ifndef ECB_MEMORY_FENCE
647 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
648 /* we assume that these memory fences work on all variables/all memory accesses, */
649 /* not just C11 atomics and atomic accesses */
650 #include <stdatomic.h>
651 /* unfortunately, the C11 memory model seems to be very limited, and unable to express */
652 /* simple barrier semantics. That means we need to take out thor's hammer. */
653 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
654 #endif
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
161#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
162# define expect(expr,value) (expr) 721 #define ecb_expect(expr,value) (expr)
163# define inline static 722 #define ecb_prefetch(addr,rw,locality)
164#endif 723#endif
165 724
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. */
166#define expect_false(expr) expect ((expr) != 0, 0) 756#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
167#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)
168 761
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
169#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
170#define ABSPRI(w) ((w)->priority - EV_MINPRI) 1026# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1027#endif
171 1028
172#define EMPTY0 /* required for microsofts broken pseudo-c compiler */ 1029#define EMPTY /* required for microsofts broken pseudo-c compiler */
173#define EMPTY2(a,b) /* used to suppress some warnings */ 1030#define EMPTY2(a,b) /* used to suppress some warnings */
174 1031
175typedef struct ev_watcher *W; 1032typedef ev_watcher *W;
176typedef struct ev_watcher_list *WL; 1033typedef ev_watcher_list *WL;
177typedef struct ev_watcher_time *WT; 1034typedef ev_watcher_time *WT;
178 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
179static 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
180 1058
181#ifdef _WIN32 1059#ifdef _WIN32
182# include "ev_win32.c" 1060# include "ev_win32.c"
183#endif 1061#endif
184 1062
185/*****************************************************************************/ 1063/*****************************************************************************/
186 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
187static void (*syserr_cb)(const char *msg); 1163static void (*syserr_cb)(const char *msg) EV_THROW;
188 1164
1165void ecb_cold
189void ev_set_syserr_cb (void (*cb)(const char *msg)) 1166ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
190{ 1167{
191 syserr_cb = cb; 1168 syserr_cb = cb;
192} 1169}
193 1170
194static void 1171static void noinline ecb_cold
195syserr (const char *msg) 1172ev_syserr (const char *msg)
196{ 1173{
197 if (!msg) 1174 if (!msg)
198 msg = "(libev) system error"; 1175 msg = "(libev) system error";
199 1176
200 if (syserr_cb) 1177 if (syserr_cb)
201 syserr_cb (msg); 1178 syserr_cb (msg);
202 else 1179 else
203 { 1180 {
1181#if EV_AVOID_STDIO
1182 ev_printerr (msg);
1183 ev_printerr (": ");
1184 ev_printerr (strerror (errno));
1185 ev_printerr ("\n");
1186#else
204 perror (msg); 1187 perror (msg);
1188#endif
205 abort (); 1189 abort ();
206 } 1190 }
207} 1191}
208 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
209static void *(*alloc)(void *ptr, long size); 1212static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
210 1213
1214void ecb_cold
211void ev_set_allocator (void *(*cb)(void *ptr, long size)) 1215ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
212{ 1216{
213 alloc = cb; 1217 alloc = cb;
214} 1218}
215 1219
216static void * 1220inline_speed void *
217ev_realloc (void *ptr, long size) 1221ev_realloc (void *ptr, long size)
218{ 1222{
219 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1223 ptr = alloc (ptr, size);
220 1224
221 if (!ptr && size) 1225 if (!ptr && size)
222 { 1226 {
1227#if EV_AVOID_STDIO
1228 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1229#else
223 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1230 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1231#endif
224 abort (); 1232 abort ();
225 } 1233 }
226 1234
227 return ptr; 1235 return ptr;
228} 1236}
… …
230#define ev_malloc(size) ev_realloc (0, (size)) 1238#define ev_malloc(size) ev_realloc (0, (size))
231#define ev_free(ptr) ev_realloc ((ptr), 0) 1239#define ev_free(ptr) ev_realloc ((ptr), 0)
232 1240
233/*****************************************************************************/ 1241/*****************************************************************************/
234 1242
1243/* set in reify when reification needed */
1244#define EV_ANFD_REIFY 1
1245
1246/* file descriptor info structure */
235typedef struct 1247typedef struct
236{ 1248{
237 WL head; 1249 WL head;
238 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 */
239 unsigned char reify; 1253 unsigned char unused;
1254#if EV_USE_EPOLL
1255 unsigned int egen; /* generation counter to counter epoll bugs */
1256#endif
240#if EV_SELECT_IS_WINSOCKET 1257#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
241 SOCKET handle; 1258 SOCKET handle;
242#endif 1259#endif
1260#if EV_USE_IOCP
1261 OVERLAPPED or, ow;
1262#endif
243} ANFD; 1263} ANFD;
244 1264
1265/* stores the pending event set for a given watcher */
245typedef struct 1266typedef struct
246{ 1267{
247 W w; 1268 W w;
248 int events; 1269 int events; /* the pending event set for the given watcher */
249} 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
250 1299
251#if EV_MULTIPLICITY 1300#if EV_MULTIPLICITY
252 1301
253 struct ev_loop 1302 struct ev_loop
254 { 1303 {
… …
259 #undef VAR 1308 #undef VAR
260 }; 1309 };
261 #include "ev_wrap.h" 1310 #include "ev_wrap.h"
262 1311
263 static struct ev_loop default_loop_struct; 1312 static struct ev_loop default_loop_struct;
264 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 */
265 1314
266#else 1315#else
267 1316
268 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 */
269 #define VAR(name,decl) static decl; 1318 #define VAR(name,decl) static decl;
270 #include "ev_vars.h" 1319 #include "ev_vars.h"
271 #undef VAR 1320 #undef VAR
272 1321
273 static int ev_default_loop_ptr; 1322 static int ev_default_loop_ptr;
274 1323
275#endif 1324#endif
276 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
277/*****************************************************************************/ 1338/*****************************************************************************/
278 1339
1340#ifndef EV_HAVE_EV_TIME
279ev_tstamp 1341ev_tstamp
280ev_time (void) 1342ev_time (void) EV_THROW
281{ 1343{
282#if EV_USE_REALTIME 1344#if EV_USE_REALTIME
1345 if (expect_true (have_realtime))
1346 {
283 struct timespec ts; 1347 struct timespec ts;
284 clock_gettime (CLOCK_REALTIME, &ts); 1348 clock_gettime (CLOCK_REALTIME, &ts);
285 return ts.tv_sec + ts.tv_nsec * 1e-9; 1349 return ts.tv_sec + ts.tv_nsec * 1e-9;
286#else 1350 }
1351#endif
1352
287 struct timeval tv; 1353 struct timeval tv;
288 gettimeofday (&tv, 0); 1354 gettimeofday (&tv, 0);
289 return tv.tv_sec + tv.tv_usec * 1e-6; 1355 return tv.tv_sec + tv.tv_usec * 1e-6;
290#endif
291} 1356}
1357#endif
292 1358
293inline ev_tstamp 1359inline_size ev_tstamp
294get_clock (void) 1360get_clock (void)
295{ 1361{
296#if EV_USE_MONOTONIC 1362#if EV_USE_MONOTONIC
297 if (expect_true (have_monotonic)) 1363 if (expect_true (have_monotonic))
298 { 1364 {
… …
305 return ev_time (); 1371 return ev_time ();
306} 1372}
307 1373
308#if EV_MULTIPLICITY 1374#if EV_MULTIPLICITY
309ev_tstamp 1375ev_tstamp
310ev_now (EV_P) 1376ev_now (EV_P) EV_THROW
311{ 1377{
312 return ev_rt_now; 1378 return ev_rt_now;
313} 1379}
314#endif 1380#endif
315 1381
316#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))
317 1442
318#define array_needsize(type,base,cur,cnt,init) \ 1443#define array_needsize(type,base,cur,cnt,init) \
319 if (expect_false ((cnt) > cur)) \ 1444 if (expect_false ((cnt) > (cur))) \
320 { \ 1445 { \
321 int newcnt = cur; \ 1446 int ecb_unused ocur_ = (cur); \
322 do \ 1447 (base) = (type *)array_realloc \
323 { \ 1448 (sizeof (type), (base), &(cur), (cnt)); \
324 newcnt = array_roundsize (type, newcnt << 1); \ 1449 init ((base) + (ocur_), (cur) - ocur_); \
325 } \
326 while ((cnt) > newcnt); \
327 \
328 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
329 init (base + cur, newcnt - cur); \
330 cur = newcnt; \
331 } 1450 }
332 1451
1452#if 0
333#define array_slim(type,stem) \ 1453#define array_slim(type,stem) \
334 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 1454 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
335 { \ 1455 { \
336 stem ## max = array_roundsize (stem ## cnt >> 1); \ 1456 stem ## max = array_roundsize (stem ## cnt >> 1); \
337 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 1457 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
338 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1458 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
339 } 1459 }
1460#endif
340 1461
341#define array_free(stem, idx) \ 1462#define array_free(stem, idx) \
342 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
343 1464
344/*****************************************************************************/ 1465/*****************************************************************************/
345 1466
346static void 1467/* dummy callback for pending events */
347anfds_init (ANFD *base, int count) 1468static void noinline
1469pendingcb (EV_P_ ev_prepare *w, int revents)
348{ 1470{
349 while (count--)
350 {
351 base->head = 0;
352 base->events = EV_NONE;
353 base->reify = 0;
354
355 ++base;
356 }
357} 1471}
358 1472
359void 1473void noinline
360ev_feed_event (EV_P_ void *w, int revents) 1474ev_feed_event (EV_P_ void *w, int revents) EV_THROW
361{ 1475{
362 W w_ = (W)w; 1476 W w_ = (W)w;
1477 int pri = ABSPRI (w_);
363 1478
364 if (w_->pending) 1479 if (expect_false (w_->pending))
1480 pendings [pri][w_->pending - 1].events |= revents;
1481 else
365 { 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_;
366 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 1486 pendings [pri][w_->pending - 1].events = revents;
367 return;
368 } 1487 }
369 1488
370 w_->pending = ++pendingcnt [ABSPRI (w_)]; 1489 pendingpri = NUMPRI - 1;
371 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
372 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
373 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
374} 1490}
375 1491
376static 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
377queue_events (EV_P_ W *events, int eventcnt, int type) 1508queue_events (EV_P_ W *events, int eventcnt, int type)
378{ 1509{
379 int i; 1510 int i;
380 1511
381 for (i = 0; i < eventcnt; ++i) 1512 for (i = 0; i < eventcnt; ++i)
382 ev_feed_event (EV_A_ events [i], type); 1513 ev_feed_event (EV_A_ events [i], type);
383} 1514}
384 1515
1516/*****************************************************************************/
1517
385inline void 1518inline_speed void
386fd_event (EV_P_ int fd, int revents) 1519fd_event_nocheck (EV_P_ int fd, int revents)
387{ 1520{
388 ANFD *anfd = anfds + fd; 1521 ANFD *anfd = anfds + fd;
389 struct ev_io *w; 1522 ev_io *w;
390 1523
391 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)
392 { 1525 {
393 int ev = w->events & revents; 1526 int ev = w->events & revents;
394 1527
395 if (ev) 1528 if (ev)
396 ev_feed_event (EV_A_ (W)w, ev); 1529 ev_feed_event (EV_A_ (W)w, ev);
397 } 1530 }
398} 1531}
399 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
400void 1544void
401ev_feed_fd_event (EV_P_ int fd, int revents) 1545ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
402{ 1546{
1547 if (fd >= 0 && fd < anfdmax)
403 fd_event (EV_A_ fd, revents); 1548 fd_event_nocheck (EV_A_ fd, revents);
404} 1549}
405 1550
406/*****************************************************************************/ 1551/* make sure the external fd watch events are in-sync */
407 1552/* with the kernel/libev internal state */
408static void 1553inline_size void
409fd_reify (EV_P) 1554fd_reify (EV_P)
410{ 1555{
411 int i; 1556 int i;
412 1557
1558#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
413 for (i = 0; i < fdchangecnt; ++i) 1559 for (i = 0; i < fdchangecnt; ++i)
414 { 1560 {
415 int fd = fdchanges [i]; 1561 int fd = fdchanges [i];
416 ANFD *anfd = anfds + fd; 1562 ANFD *anfd = anfds + fd;
417 struct ev_io *w;
418 1563
419 int events = 0; 1564 if (anfd->reify & EV__IOFDSET && anfd->head)
420
421 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
422 events |= w->events;
423
424#if EV_SELECT_IS_WINSOCKET
425 if (events)
426 { 1565 {
1566 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1567
1568 if (handle != anfd->handle)
1569 {
427 unsigned long argp; 1570 unsigned long arg;
428 anfd->handle = _get_osfhandle (fd); 1571
429 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 }
430 } 1579 }
1580 }
431#endif 1581#endif
432 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
433 anfd->reify = 0; 1592 anfd->reify = 0;
434 1593
435 method_modify (EV_A_ fd, anfd->events, events); 1594 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1595 {
436 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);
437 } 1607 }
438 1608
439 fdchangecnt = 0; 1609 fdchangecnt = 0;
440} 1610}
441 1611
442static void 1612/* something about the given fd changed */
1613inline_size void
443fd_change (EV_P_ int fd) 1614fd_change (EV_P_ int fd, int flags)
444{ 1615{
445 if (anfds [fd].reify) 1616 unsigned char reify = anfds [fd].reify;
446 return;
447
448 anfds [fd].reify = 1; 1617 anfds [fd].reify |= flags;
449 1618
1619 if (expect_true (!reify))
1620 {
450 ++fdchangecnt; 1621 ++fdchangecnt;
451 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 1622 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
452 fdchanges [fdchangecnt - 1] = fd; 1623 fdchanges [fdchangecnt - 1] = fd;
1624 }
453} 1625}
454 1626
455static void 1627/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1628inline_speed void ecb_cold
456fd_kill (EV_P_ int fd) 1629fd_kill (EV_P_ int fd)
457{ 1630{
458 struct ev_io *w; 1631 ev_io *w;
459 1632
460 while ((w = (struct ev_io *)anfds [fd].head)) 1633 while ((w = (ev_io *)anfds [fd].head))
461 { 1634 {
462 ev_io_stop (EV_A_ w); 1635 ev_io_stop (EV_A_ w);
463 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);
464 } 1637 }
465} 1638}
466 1639
467static int 1640/* check whether the given fd is actually valid, for error recovery */
1641inline_size int ecb_cold
468fd_valid (int fd) 1642fd_valid (int fd)
469{ 1643{
470#ifdef _WIN32 1644#ifdef _WIN32
471 return _get_osfhandle (fd) != -1; 1645 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
472#else 1646#else
473 return fcntl (fd, F_GETFD) != -1; 1647 return fcntl (fd, F_GETFD) != -1;
474#endif 1648#endif
475} 1649}
476 1650
477/* called on EBADF to verify fds */ 1651/* called on EBADF to verify fds */
478static void 1652static void noinline ecb_cold
479fd_ebadf (EV_P) 1653fd_ebadf (EV_P)
480{ 1654{
481 int fd; 1655 int fd;
482 1656
483 for (fd = 0; fd < anfdmax; ++fd) 1657 for (fd = 0; fd < anfdmax; ++fd)
484 if (anfds [fd].events) 1658 if (anfds [fd].events)
485 if (!fd_valid (fd) == -1 && errno == EBADF) 1659 if (!fd_valid (fd) && errno == EBADF)
486 fd_kill (EV_A_ fd); 1660 fd_kill (EV_A_ fd);
487} 1661}
488 1662
489/* 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 */
490static void 1664static void noinline ecb_cold
491fd_enomem (EV_P) 1665fd_enomem (EV_P)
492{ 1666{
493 int fd; 1667 int fd;
494 1668
495 for (fd = anfdmax; fd--; ) 1669 for (fd = anfdmax; fd--; )
496 if (anfds [fd].events) 1670 if (anfds [fd].events)
497 { 1671 {
498 fd_kill (EV_A_ fd); 1672 fd_kill (EV_A_ fd);
499 return; 1673 break;
500 } 1674 }
501} 1675}
502 1676
503/* 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 */
504static void 1678static void noinline
505fd_rearm_all (EV_P) 1679fd_rearm_all (EV_P)
506{ 1680{
507 int fd; 1681 int fd;
508 1682
509 /* this should be highly optimised to not do anything but set a flag */
510 for (fd = 0; fd < anfdmax; ++fd) 1683 for (fd = 0; fd < anfdmax; ++fd)
511 if (anfds [fd].events) 1684 if (anfds [fd].events)
512 { 1685 {
513 anfds [fd].events = 0; 1686 anfds [fd].events = 0;
514 fd_change (EV_A_ fd); 1687 anfds [fd].emask = 0;
1688 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
515 } 1689 }
516} 1690}
517 1691
518/*****************************************************************************/ 1692/* used to prepare libev internal fd's */
519 1693/* this is not fork-safe */
520static void
521upheap (WT *heap, int k)
522{
523 WT w = heap [k];
524
525 while (k && heap [k >> 1]->at > w->at)
526 {
527 heap [k] = heap [k >> 1];
528 ((W)heap [k])->active = k + 1;
529 k >>= 1;
530 }
531
532 heap [k] = w;
533 ((W)heap [k])->active = k + 1;
534
535}
536
537static void
538downheap (WT *heap, int N, int k)
539{
540 WT w = heap [k];
541
542 while (k < (N >> 1))
543 {
544 int j = k << 1;
545
546 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
547 ++j;
548
549 if (w->at <= heap [j]->at)
550 break;
551
552 heap [k] = heap [j];
553 ((W)heap [k])->active = k + 1;
554 k = j;
555 }
556
557 heap [k] = w;
558 ((W)heap [k])->active = k + 1;
559}
560
561inline void 1694inline_speed void
562adjustheap (WT *heap, int N, int k)
563{
564 upheap (heap, k);
565 downheap (heap, N, k);
566}
567
568/*****************************************************************************/
569
570typedef struct
571{
572 WL head;
573 sig_atomic_t volatile gotsig;
574} ANSIG;
575
576static ANSIG *signals;
577static int signalmax;
578
579static int sigpipe [2];
580static sig_atomic_t volatile gotsig;
581static struct ev_io sigev;
582
583static void
584signals_init (ANSIG *base, int count)
585{
586 while (count--)
587 {
588 base->head = 0;
589 base->gotsig = 0;
590
591 ++base;
592 }
593}
594
595static void
596sighandler (int signum)
597{
598#if _WIN32
599 signal (signum, sighandler);
600#endif
601
602 signals [signum - 1].gotsig = 1;
603
604 if (!gotsig)
605 {
606 int old_errno = errno;
607 gotsig = 1;
608 write (sigpipe [1], &signum, 1);
609 errno = old_errno;
610 }
611}
612
613void
614ev_feed_signal_event (EV_P_ int signum)
615{
616 WL w;
617
618#if EV_MULTIPLICITY
619 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
620#endif
621
622 --signum;
623
624 if (signum < 0 || signum >= signalmax)
625 return;
626
627 signals [signum].gotsig = 0;
628
629 for (w = signals [signum].head; w; w = w->next)
630 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
631}
632
633static void
634sigcb (EV_P_ struct ev_io *iow, int revents)
635{
636 int signum;
637
638 read (sigpipe [0], &revents, 1);
639 gotsig = 0;
640
641 for (signum = signalmax; signum--; )
642 if (signals [signum].gotsig)
643 ev_feed_signal_event (EV_A_ signum + 1);
644}
645
646inline void
647fd_intern (int fd) 1695fd_intern (int fd)
648{ 1696{
649#ifdef _WIN32 1697#ifdef _WIN32
650 int arg = 1; 1698 unsigned long arg = 1;
651 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 1699 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
652#else 1700#else
653 fcntl (fd, F_SETFD, FD_CLOEXEC); 1701 fcntl (fd, F_SETFD, FD_CLOEXEC);
654 fcntl (fd, F_SETFL, O_NONBLOCK); 1702 fcntl (fd, F_SETFL, O_NONBLOCK);
655#endif 1703#endif
656} 1704}
657 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) */
658static void 1951static void
659siginit (EV_P) 1952pipecb (EV_P_ ev_io *iow, int revents)
660{ 1953{
661 fd_intern (sigpipe [0]); 1954 int i;
662 fd_intern (sigpipe [1]);
663 1955
664 ev_io_set (&sigev, sigpipe [0], EV_READ); 1956 if (revents & EV_READ)
665 ev_io_start (EV_A_ &sigev); 1957 {
666 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
667} 2014}
668 2015
669/*****************************************************************************/ 2016/*****************************************************************************/
670 2017
671static 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;
672 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{
673#ifndef _WIN32 2038#ifdef _WIN32
2039 signal (signum, ev_sighandler);
2040#endif
674 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 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
675static 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}
676 2122
677#ifndef WCONTINUED 2123#ifndef WCONTINUED
678# define WCONTINUED 0 2124# define WCONTINUED 0
679#endif 2125#endif
680 2126
2127/* called on sigchld etc., calls waitpid */
681static void 2128static void
682child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
683{
684 struct ev_child *w;
685
686 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
687 if (w->pid == pid || !w->pid)
688 {
689 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
690 w->rpid = pid;
691 w->rstatus = status;
692 ev_feed_event (EV_A_ (W)w, EV_CHILD);
693 }
694}
695
696static void
697childcb (EV_P_ struct ev_signal *sw, int revents) 2129childcb (EV_P_ ev_signal *sw, int revents)
698{ 2130{
699 int pid, status; 2131 int pid, status;
700 2132
2133 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
701 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 2134 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
702 { 2135 if (!WCONTINUED
2136 || errno != EINVAL
2137 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
2138 return;
2139
703 /* 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 */
704 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2142 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
705 2143
706 child_reap (EV_A_ sw, pid, pid, status); 2144 child_reap (EV_A_ pid, pid, status);
2145 if ((EV_PID_HASHSIZE) > 1)
707 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 */
708 }
709} 2147}
710 2148
711#endif 2149#endif
712 2150
713/*****************************************************************************/ 2151/*****************************************************************************/
714 2152
2153#if EV_USE_IOCP
2154# include "ev_iocp.c"
2155#endif
2156#if EV_USE_PORT
2157# include "ev_port.c"
2158#endif
715#if EV_USE_KQUEUE 2159#if EV_USE_KQUEUE
716# include "ev_kqueue.c" 2160# include "ev_kqueue.c"
717#endif 2161#endif
718#if EV_USE_EPOLL 2162#if EV_USE_EPOLL
719# include "ev_epoll.c" 2163# include "ev_epoll.c"
… …
723#endif 2167#endif
724#if EV_USE_SELECT 2168#if EV_USE_SELECT
725# include "ev_select.c" 2169# include "ev_select.c"
726#endif 2170#endif
727 2171
728int 2172int ecb_cold
729ev_version_major (void) 2173ev_version_major (void) EV_THROW
730{ 2174{
731 return EV_VERSION_MAJOR; 2175 return EV_VERSION_MAJOR;
732} 2176}
733 2177
734int 2178int ecb_cold
735ev_version_minor (void) 2179ev_version_minor (void) EV_THROW
736{ 2180{
737 return EV_VERSION_MINOR; 2181 return EV_VERSION_MINOR;
738} 2182}
739 2183
740/* 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 */
741static int 2185int inline_size ecb_cold
742enable_secure (void) 2186enable_secure (void)
743{ 2187{
744#ifdef _WIN32 2188#ifdef _WIN32
745 return 0; 2189 return 0;
746#else 2190#else
747 return getuid () != geteuid () 2191 return getuid () != geteuid ()
748 || getgid () != getegid (); 2192 || getgid () != getegid ();
749#endif 2193#endif
750} 2194}
751 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
752unsigned int 2244unsigned int
753ev_method (EV_P) 2245ev_backend (EV_P) EV_THROW
754{ 2246{
755 return method; 2247 return backend;
756} 2248}
757 2249
758static 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
759loop_init (EV_P_ unsigned int flags) 2303loop_init (EV_P_ unsigned int flags) EV_THROW
760{ 2304{
761 if (!method) 2305 if (!backend)
762 { 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
763#if EV_USE_MONOTONIC 2319#if EV_USE_MONOTONIC
2320 if (!have_monotonic)
764 { 2321 {
765 struct timespec ts; 2322 struct timespec ts;
2323
766 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2324 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
767 have_monotonic = 1; 2325 have_monotonic = 1;
768 } 2326 }
769#endif 2327#endif
770 2328
771 ev_rt_now = ev_time (); 2329 /* pid check not overridable via env */
772 mn_now = get_clock (); 2330#ifndef _WIN32
773 now_floor = mn_now; 2331 if (flags & EVFLAG_FORKCHECK)
774 rtmn_diff = ev_rt_now - mn_now; 2332 curpid = getpid ();
2333#endif
775 2334
776 if (!(flags & EVFLAG_NOENV) && !enable_secure () && getenv ("LIBEV_FLAGS")) 2335 if (!(flags & EVFLAG_NOENV)
2336 && !enable_secure ()
2337 && getenv ("LIBEV_FLAGS"))
777 flags = atoi (getenv ("LIBEV_FLAGS")); 2338 flags = atoi (getenv ("LIBEV_FLAGS"));
778 2339
779 if (!(flags & 0x0000ffff)) 2340 ev_rt_now = ev_time ();
780 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
781 2347
782 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
2371#if EV_USE_PORT
2372 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
2373#endif
783#if EV_USE_KQUEUE 2374#if EV_USE_KQUEUE
784 if (!method && (flags & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ flags); 2375 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
785#endif 2376#endif
786#if EV_USE_EPOLL 2377#if EV_USE_EPOLL
787 if (!method && (flags & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ flags); 2378 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
788#endif 2379#endif
789#if EV_USE_POLL 2380#if EV_USE_POLL
790 if (!method && (flags & EVMETHOD_POLL )) method = poll_init (EV_A_ flags); 2381 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
791#endif 2382#endif
792#if EV_USE_SELECT 2383#if EV_USE_SELECT
793 if (!method && (flags & EVMETHOD_SELECT)) method = select_init (EV_A_ flags); 2384 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
794#endif 2385#endif
795 2386
2387 ev_prepare_init (&pending_w, pendingcb);
2388
2389#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
796 ev_init (&sigev, sigcb); 2390 ev_init (&pipe_w, pipecb);
797 ev_set_priority (&sigev, EV_MAXPRI); 2391 ev_set_priority (&pipe_w, EV_MAXPRI);
2392#endif
798 } 2393 }
799} 2394}
800 2395
801void 2396/* free up a loop structure */
2397void ecb_cold
802loop_destroy (EV_P) 2398ev_loop_destroy (EV_P)
803{ 2399{
804 int i; 2400 int i;
805 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
2458#if EV_USE_PORT
2459 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
2460#endif
806#if EV_USE_KQUEUE 2461#if EV_USE_KQUEUE
807 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A); 2462 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
808#endif 2463#endif
809#if EV_USE_EPOLL 2464#if EV_USE_EPOLL
810 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A); 2465 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
811#endif 2466#endif
812#if EV_USE_POLL 2467#if EV_USE_POLL
813 if (method == EVMETHOD_POLL ) poll_destroy (EV_A); 2468 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
814#endif 2469#endif
815#if EV_USE_SELECT 2470#if EV_USE_SELECT
816 if (method == EVMETHOD_SELECT) select_destroy (EV_A); 2471 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
817#endif 2472#endif
818 2473
819 for (i = NUMPRI; i--; ) 2474 for (i = NUMPRI; i--; )
2475 {
820 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;
821 2483
822 /* 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);
823 array_free (fdchange, EMPTY0); 2486 array_free (fdchange, EMPTY);
824 array_free (timer, EMPTY0); 2487 array_free (timer, EMPTY);
825#if EV_PERIODICS 2488#if EV_PERIODIC_ENABLE
826 array_free (periodic, EMPTY0); 2489 array_free (periodic, EMPTY);
827#endif 2490#endif
2491#if EV_FORK_ENABLE
2492 array_free (fork, EMPTY);
2493#endif
2494#if EV_CLEANUP_ENABLE
828 array_free (idle, EMPTY0); 2495 array_free (cleanup, EMPTY);
2496#endif
829 array_free (prepare, EMPTY0); 2497 array_free (prepare, EMPTY);
830 array_free (check, EMPTY0); 2498 array_free (check, EMPTY);
2499#if EV_ASYNC_ENABLE
2500 array_free (async, EMPTY);
2501#endif
831 2502
832 method = 0; 2503 backend = 0;
833}
834 2504
835static 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
836loop_fork (EV_P) 2520loop_fork (EV_P)
837{ 2521{
2522#if EV_USE_PORT
2523 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2524#endif
2525#if EV_USE_KQUEUE
2526 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
2527#endif
838#if EV_USE_EPOLL 2528#if EV_USE_EPOLL
839 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A); 2529 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
840#endif 2530#endif
841#if EV_USE_KQUEUE 2531#if EV_USE_INOTIFY
842 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A); 2532 infy_fork (EV_A);
843#endif 2533#endif
844 2534
845 if (ev_is_active (&sigev)) 2535 if (ev_is_active (&pipe_w))
846 { 2536 {
847 /* default loop */ 2537 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
848 2538
849 ev_ref (EV_A); 2539 ev_ref (EV_A);
850 ev_io_stop (EV_A_ &sigev); 2540 ev_io_stop (EV_A_ &pipe_w);
851 close (sigpipe [0]);
852 close (sigpipe [1]);
853 2541
854 while (pipe (sigpipe)) 2542#if EV_USE_EVENTFD
855 syserr ("(libev) error creating pipe"); 2543 if (evfd >= 0)
2544 close (evfd);
2545#endif
856 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
857 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
858 } 2558 }
859 2559
860 postfork = 0; 2560 postfork = 0;
861} 2561}
862 2562
863#if EV_MULTIPLICITY 2563#if EV_MULTIPLICITY
2564
864struct ev_loop * 2565struct ev_loop * ecb_cold
865ev_loop_new (unsigned int flags) 2566ev_loop_new (unsigned int flags) EV_THROW
866{ 2567{
867 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));
868 2569
869 memset (loop, 0, sizeof (struct ev_loop)); 2570 memset (EV_A, 0, sizeof (struct ev_loop));
870
871 loop_init (EV_A_ flags); 2571 loop_init (EV_A_ flags);
872 2572
873 if (ev_method (EV_A)) 2573 if (ev_backend (EV_A))
874 return loop; 2574 return EV_A;
875 2575
2576 ev_free (EV_A);
876 return 0; 2577 return 0;
877} 2578}
878 2579
879void 2580#endif /* multiplicity */
880ev_loop_destroy (EV_P)
881{
882 loop_destroy (EV_A);
883 ev_free (loop);
884}
885 2581
886void 2582#if EV_VERIFY
887ev_loop_fork (EV_P) 2583static void noinline ecb_cold
2584verify_watcher (EV_P_ W w)
888{ 2585{
889 postfork = 1; 2586 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
890}
891 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}
892#endif 2703#endif
893 2704
894#if EV_MULTIPLICITY 2705#if EV_MULTIPLICITY
895struct ev_loop * 2706struct ev_loop * ecb_cold
896ev_default_loop_ (unsigned int flags)
897#else 2707#else
898int 2708int
2709#endif
899ev_default_loop (unsigned int flags) 2710ev_default_loop (unsigned int flags) EV_THROW
900#endif
901{ 2711{
902 if (sigpipe [0] == sigpipe [1])
903 if (pipe (sigpipe))
904 return 0;
905
906 if (!ev_default_loop_ptr) 2712 if (!ev_default_loop_ptr)
907 { 2713 {
908#if EV_MULTIPLICITY 2714#if EV_MULTIPLICITY
909 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 2715 EV_P = ev_default_loop_ptr = &default_loop_struct;
910#else 2716#else
911 ev_default_loop_ptr = 1; 2717 ev_default_loop_ptr = 1;
912#endif 2718#endif
913 2719
914 loop_init (EV_A_ flags); 2720 loop_init (EV_A_ flags);
915 2721
916 if (ev_method (EV_A)) 2722 if (ev_backend (EV_A))
917 { 2723 {
918 siginit (EV_A); 2724#if EV_CHILD_ENABLE
919
920#ifndef _WIN32
921 ev_signal_init (&childev, childcb, SIGCHLD); 2725 ev_signal_init (&childev, childcb, SIGCHLD);
922 ev_set_priority (&childev, EV_MAXPRI); 2726 ev_set_priority (&childev, EV_MAXPRI);
923 ev_signal_start (EV_A_ &childev); 2727 ev_signal_start (EV_A_ &childev);
924 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2728 ev_unref (EV_A); /* child watcher should not keep loop alive */
925#endif 2729#endif
… …
930 2734
931 return ev_default_loop_ptr; 2735 return ev_default_loop_ptr;
932} 2736}
933 2737
934void 2738void
935ev_default_destroy (void) 2739ev_loop_fork (EV_P) EV_THROW
936{ 2740{
937#if EV_MULTIPLICITY 2741 postfork = 1; /* must be in line with ev_default_fork */
938 struct ev_loop *loop = ev_default_loop_ptr;
939#endif
940
941#ifndef _WIN32
942 ev_ref (EV_A); /* child watcher */
943 ev_signal_stop (EV_A_ &childev);
944#endif
945
946 ev_ref (EV_A); /* signal watcher */
947 ev_io_stop (EV_A_ &sigev);
948
949 close (sigpipe [0]); sigpipe [0] = 0;
950 close (sigpipe [1]); sigpipe [1] = 0;
951
952 loop_destroy (EV_A);
953} 2742}
2743
2744/*****************************************************************************/
954 2745
955void 2746void
956ev_default_fork (void) 2747ev_invoke (EV_P_ void *w, int revents)
957{ 2748{
958#if EV_MULTIPLICITY 2749 EV_CB_INVOKE ((W)w, revents);
959 struct ev_loop *loop = ev_default_loop_ptr;
960#endif
961
962 if (method)
963 postfork = 1;
964} 2750}
965 2751
966/*****************************************************************************/ 2752unsigned int
967 2753ev_pending_count (EV_P) EV_THROW
968static int
969any_pending (EV_P)
970{ 2754{
971 int pri; 2755 int pri;
2756 unsigned int count = 0;
972 2757
973 for (pri = NUMPRI; pri--; ) 2758 for (pri = NUMPRI; pri--; )
974 if (pendingcnt [pri]) 2759 count += pendingcnt [pri];
975 return 1;
976 2760
977 return 0; 2761 return count;
978} 2762}
979 2763
980static void 2764void noinline
981call_pending (EV_P) 2765ev_invoke_pending (EV_P)
982{ 2766{
983 int pri; 2767 for (pendingpri = NUMPRI; pendingpri--; ) /* pendingpri is modified during the loop */
984
985 for (pri = NUMPRI; pri--; )
986 while (pendingcnt [pri]) 2768 while (pendingcnt [pendingpri])
987 { 2769 {
988 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2770 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
989 2771
990 if (p->w)
991 {
992 p->w->pending = 0; 2772 p->w->pending = 0;
993 EV_CB_INVOKE (p->w, p->events); 2773 EV_CB_INVOKE (p->w, p->events);
994 } 2774 EV_FREQUENT_CHECK;
995 } 2775 }
996} 2776}
997 2777
998static void 2778#if EV_IDLE_ENABLE
2779/* make idle watchers pending. this handles the "call-idle */
2780/* only when higher priorities are idle" logic */
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
999timers_reify (EV_P) 2805timers_reify (EV_P)
1000{ 2806{
2807 EV_FREQUENT_CHECK;
2808
1001 while (timercnt && ((WT)timers [0])->at <= mn_now) 2809 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1002 { 2810 {
1003 struct ev_timer *w = timers [0]; 2811 do
1004
1005 assert (("inactive timer on timer heap detected", ev_is_active (w)));
1006
1007 /* first reschedule or stop timer */
1008 if (w->repeat)
1009 { 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
1010 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.));
1011 2825
1012 ((WT)w)->at += w->repeat; 2826 ANHE_at_cache (timers [HEAP0]);
1013 if (((WT)w)->at < mn_now)
1014 ((WT)w)->at = mn_now;
1015
1016 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);
1017 } 2834 }
1018 else 2835 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1019 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1020 2836
1021 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)
1022 } 2851 {
1023} 2852 ev_tstamp nat = at + w->interval;
1024 2853
1025#if EV_PERIODICS 2854 /* when resolution fails us, we use ev_rt_now */
1026static void 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 */
2868inline_size void
1027periodics_reify (EV_P) 2869periodics_reify (EV_P)
1028{ 2870{
2871 EV_FREQUENT_CHECK;
2872
1029 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now) 2873 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1030 { 2874 {
1031 struct ev_periodic *w = periodics [0]; 2875 do
2876 {
2877 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
1032 2878
1033 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 2879 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
1034 2880
1035 /* 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
1036 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))
1037 { 2963 {
1038 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001); 2964 ev_rt_now = rtmn_diff + mn_now;
1039 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now)); 2965 return;
1040 downheap ((WT *)periodics, periodiccnt, 0);
1041 } 2966 }
1042 else if (w->interval)
1043 {
1044 ((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
1045 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1046 downheap ((WT *)periodics, periodiccnt, 0);
1047 }
1048 else
1049 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1050 2967
1051 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1052 }
1053}
1054
1055static void
1056periodics_reschedule (EV_P)
1057{
1058 int i;
1059
1060 /* adjust periodics after time jump */
1061 for (i = 0; i < periodiccnt; ++i)
1062 {
1063 struct ev_periodic *w = periodics [i];
1064
1065 if (w->reschedule_cb)
1066 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1067 else if (w->interval)
1068 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1069 }
1070
1071 /* now rebuild the heap */
1072 for (i = periodiccnt >> 1; i--; )
1073 downheap ((WT *)periodics, periodiccnt, i);
1074}
1075#endif
1076
1077inline int
1078time_update_monotonic (EV_P)
1079{
1080 mn_now = get_clock ();
1081
1082 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1083 {
1084 ev_rt_now = rtmn_diff + mn_now;
1085 return 0;
1086 }
1087 else
1088 {
1089 now_floor = mn_now; 2968 now_floor = mn_now;
1090 ev_rt_now = ev_time (); 2969 ev_rt_now = ev_time ();
1091 return 1;
1092 }
1093}
1094 2970
1095static void 2971 /* loop a few times, before making important decisions.
1096time_update (EV_P) 2972 * on the choice of "4": one iteration isn't enough,
1097{ 2973 * in case we get preempted during the calls to
1098 int i; 2974 * ev_time and get_clock. a second call is almost guaranteed
1099 2975 * to succeed in that case, though. and looping a few more times
1100#if EV_USE_MONOTONIC 2976 * doesn't hurt either as we only do this on time-jumps or
1101 if (expect_true (have_monotonic)) 2977 * in the unlikely event of having been preempted here.
1102 { 2978 */
1103 if (time_update_monotonic (EV_A)) 2979 for (i = 4; --i; )
1104 { 2980 {
1105 ev_tstamp odiff = rtmn_diff; 2981 ev_tstamp diff;
1106
1107 for (i = 4; --i; ) /* loop a few times, before making important decisions */
1108 {
1109 rtmn_diff = ev_rt_now - mn_now; 2982 rtmn_diff = ev_rt_now - mn_now;
1110 2983
1111 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2984 diff = odiff - rtmn_diff;
2985
2986 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1112 return; /* all is well */ 2987 return; /* all is well */
1113 2988
1114 ev_rt_now = ev_time (); 2989 ev_rt_now = ev_time ();
1115 mn_now = get_clock (); 2990 mn_now = get_clock ();
1116 now_floor = mn_now; 2991 now_floor = mn_now;
1117 } 2992 }
1118 2993
2994 /* no timer adjustment, as the monotonic clock doesn't jump */
2995 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1119# 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
1120 periodics_reschedule (EV_A); 3010 periodics_reschedule (EV_A);
1121# endif 3011#endif
1122 /* no timer adjustment, as the monotonic clock doesn't jump */
1123 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1124 } 3012 }
1125 }
1126 else
1127#endif
1128 {
1129 ev_rt_now = ev_time ();
1130
1131 if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1132 {
1133#if EV_PERIODICS
1134 periodics_reschedule (EV_A);
1135#endif
1136
1137 /* adjust timers. this is easy, as the offset is the same for all */
1138 for (i = 0; i < timercnt; ++i)
1139 ((WT)timers [i])->at += ev_rt_now - mn_now;
1140 }
1141 3013
1142 mn_now = ev_rt_now; 3014 mn_now = ev_rt_now;
1143 } 3015 }
1144} 3016}
1145 3017
1146void 3018int
1147ev_ref (EV_P)
1148{
1149 ++activecnt;
1150}
1151
1152void
1153ev_unref (EV_P)
1154{
1155 --activecnt;
1156}
1157
1158static int loop_done;
1159
1160void
1161ev_loop (EV_P_ int flags) 3019ev_run (EV_P_ int flags)
1162{ 3020{
1163 double block; 3021#if EV_FEATURE_API
1164 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 3022 ++loop_depth;
3023#endif
1165 3024
1166 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
1167 { 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
1168 /* queue check watchers (and execute them) */ 3057 /* queue prepare watchers (and execute them) */
1169 if (expect_false (preparecnt)) 3058 if (expect_false (preparecnt))
1170 { 3059 {
1171 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3060 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1172 call_pending (EV_A); 3061 EV_INVOKE_PENDING;
1173 } 3062 }
3063#endif
3064
3065 if (expect_false (loop_done))
3066 break;
1174 3067
1175 /* we might have forked, so reify kernel state if necessary */ 3068 /* we might have forked, so reify kernel state if necessary */
1176 if (expect_false (postfork)) 3069 if (expect_false (postfork))
1177 loop_fork (EV_A); 3070 loop_fork (EV_A);
1178 3071
1179 /* update fd-related kernel structures */ 3072 /* update fd-related kernel structures */
1180 fd_reify (EV_A); 3073 fd_reify (EV_A);
1181 3074
1182 /* calculate blocking time */ 3075 /* calculate blocking time */
3076 {
3077 ev_tstamp waittime = 0.;
3078 ev_tstamp sleeptime = 0.;
1183 3079
1184 /* we only need this for !monotonic clock or timers, but as we basically 3080 /* remember old timestamp for io_blocktime calculation */
1185 always have timers, we just calculate it always */ 3081 ev_tstamp prev_mn_now = mn_now;
1186#if EV_USE_MONOTONIC 3082
1187 if (expect_true (have_monotonic)) 3083 /* update time to cancel out callback processing overhead */
1188 time_update_monotonic (EV_A); 3084 time_update (EV_A_ 1e100);
1189 else 3085
1190#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)))
1191 { 3092 {
1192 ev_rt_now = ev_time ();
1193 mn_now = ev_rt_now;
1194 }
1195
1196 if (flags & EVLOOP_NONBLOCK || idlecnt)
1197 block = 0.;
1198 else
1199 {
1200 block = MAX_BLOCKTIME; 3093 waittime = MAX_BLOCKTIME;
1201 3094
1202 if (timercnt) 3095 if (timercnt)
1203 { 3096 {
1204 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 3097 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1205 if (block > to) block = to; 3098 if (waittime > to) waittime = to;
1206 } 3099 }
1207 3100
1208#if EV_PERIODICS 3101#if EV_PERIODIC_ENABLE
1209 if (periodiccnt) 3102 if (periodiccnt)
1210 { 3103 {
1211 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + method_fudge; 3104 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1212 if (block > to) block = to; 3105 if (waittime > to) waittime = to;
1213 } 3106 }
1214#endif 3107#endif
1215 3108
1216 if (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 }
1217 } 3132 }
1218 3133
1219 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 */
1220 3140
3141 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3142
3143 if (pipe_write_skipped)
3144 {
3145 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3146 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3147 }
3148
3149
1221 /* update ev_rt_now, do magic */ 3150 /* update ev_rt_now, do magic */
1222 time_update (EV_A); 3151 time_update (EV_A_ waittime + sleeptime);
3152 }
1223 3153
1224 /* queue pending timers and reschedule them */ 3154 /* queue pending timers and reschedule them */
1225 timers_reify (EV_A); /* relative timers called last */ 3155 timers_reify (EV_A); /* relative timers called last */
1226#if EV_PERIODICS 3156#if EV_PERIODIC_ENABLE
1227 periodics_reify (EV_A); /* absolute timers called first */ 3157 periodics_reify (EV_A); /* absolute timers called first */
1228#endif 3158#endif
1229 3159
3160#if EV_IDLE_ENABLE
1230 /* queue idle watchers unless io or timers are pending */ 3161 /* queue idle watchers unless other events are pending */
1231 if (idlecnt && !any_pending (EV_A)) 3162 idle_reify (EV_A);
1232 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 3163#endif
1233 3164
3165#if EV_CHECK_ENABLE
1234 /* queue check watchers, to be executed first */ 3166 /* queue check watchers, to be executed first */
1235 if (checkcnt) 3167 if (expect_false (checkcnt))
1236 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3168 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3169#endif
1237 3170
1238 call_pending (EV_A); 3171 EV_INVOKE_PENDING;
1239
1240 if (loop_done)
1241 break;
1242 } 3172 }
3173 while (expect_true (
3174 activecnt
3175 && !loop_done
3176 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3177 ));
1243 3178
1244 if (loop_done != 2) 3179 if (loop_done == EVBREAK_ONE)
1245 loop_done = 0; 3180 loop_done = EVBREAK_CANCEL;
3181
3182#if EV_FEATURE_API
3183 --loop_depth;
3184#endif
3185
3186 return activecnt;
1246} 3187}
1247 3188
1248void 3189void
1249ev_unloop (EV_P_ int how) 3190ev_break (EV_P_ int how) EV_THROW
1250{ 3191{
1251 loop_done = how; 3192 loop_done = how;
1252} 3193}
1253 3194
3195void
3196ev_ref (EV_P) EV_THROW
3197{
3198 ++activecnt;
3199}
3200
3201void
3202ev_unref (EV_P) EV_THROW
3203{
3204 --activecnt;
3205}
3206
3207void
3208ev_now_update (EV_P) EV_THROW
3209{
3210 time_update (EV_A_ 1e100);
3211}
3212
3213void
3214ev_suspend (EV_P) EV_THROW
3215{
3216 ev_now_update (EV_A);
3217}
3218
3219void
3220ev_resume (EV_P) EV_THROW
3221{
3222 ev_tstamp mn_prev = mn_now;
3223
3224 ev_now_update (EV_A);
3225 timers_reschedule (EV_A_ mn_now - mn_prev);
3226#if EV_PERIODIC_ENABLE
3227 /* TODO: really do this? */
3228 periodics_reschedule (EV_A);
3229#endif
3230}
3231
1254/*****************************************************************************/ 3232/*****************************************************************************/
3233/* singly-linked list management, used when the expected list length is short */
1255 3234
1256inline void 3235inline_size void
1257wlist_add (WL *head, WL elem) 3236wlist_add (WL *head, WL elem)
1258{ 3237{
1259 elem->next = *head; 3238 elem->next = *head;
1260 *head = elem; 3239 *head = elem;
1261} 3240}
1262 3241
1263inline void 3242inline_size void
1264wlist_del (WL *head, WL elem) 3243wlist_del (WL *head, WL elem)
1265{ 3244{
1266 while (*head) 3245 while (*head)
1267 { 3246 {
1268 if (*head == elem) 3247 if (expect_true (*head == elem))
1269 { 3248 {
1270 *head = elem->next; 3249 *head = elem->next;
1271 return; 3250 break;
1272 } 3251 }
1273 3252
1274 head = &(*head)->next; 3253 head = &(*head)->next;
1275 } 3254 }
1276} 3255}
1277 3256
3257/* internal, faster, version of ev_clear_pending */
1278inline void 3258inline_speed void
1279ev_clear_pending (EV_P_ W w) 3259clear_pending (EV_P_ W w)
1280{ 3260{
1281 if (w->pending) 3261 if (w->pending)
1282 { 3262 {
1283 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3263 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1284 w->pending = 0; 3264 w->pending = 0;
1285 } 3265 }
1286} 3266}
1287 3267
3268int
3269ev_clear_pending (EV_P_ void *w) EV_THROW
3270{
3271 W w_ = (W)w;
3272 int pending = w_->pending;
3273
3274 if (expect_true (pending))
3275 {
3276 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3277 p->w = (W)&pending_w;
3278 w_->pending = 0;
3279 return p->events;
3280 }
3281 else
3282 return 0;
3283}
3284
1288inline void 3285inline_size void
3286pri_adjust (EV_P_ W w)
3287{
3288 int pri = ev_priority (w);
3289 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3290 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3291 ev_set_priority (w, pri);
3292}
3293
3294inline_speed void
1289ev_start (EV_P_ W w, int active) 3295ev_start (EV_P_ W w, int active)
1290{ 3296{
1291 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 3297 pri_adjust (EV_A_ w);
1292 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1293
1294 w->active = active; 3298 w->active = active;
1295 ev_ref (EV_A); 3299 ev_ref (EV_A);
1296} 3300}
1297 3301
1298inline void 3302inline_size void
1299ev_stop (EV_P_ W w) 3303ev_stop (EV_P_ W w)
1300{ 3304{
1301 ev_unref (EV_A); 3305 ev_unref (EV_A);
1302 w->active = 0; 3306 w->active = 0;
1303} 3307}
1304 3308
1305/*****************************************************************************/ 3309/*****************************************************************************/
1306 3310
1307void 3311void noinline
1308ev_io_start (EV_P_ struct ev_io *w) 3312ev_io_start (EV_P_ ev_io *w) EV_THROW
1309{ 3313{
1310 int fd = w->fd; 3314 int fd = w->fd;
1311 3315
1312 if (ev_is_active (w)) 3316 if (expect_false (ev_is_active (w)))
1313 return; 3317 return;
1314 3318
1315 assert (("ev_io_start called with negative fd", fd >= 0)); 3319 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3320 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3321
3322 EV_FREQUENT_CHECK;
1316 3323
1317 ev_start (EV_A_ (W)w, 1); 3324 ev_start (EV_A_ (W)w, 1);
1318 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3325 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1319 wlist_add ((WL *)&anfds[fd].head, (WL)w); 3326 wlist_add (&anfds[fd].head, (WL)w);
1320 3327
1321 fd_change (EV_A_ fd); 3328 /* common bug, apparently */
1322} 3329 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
1323 3330
1324void 3331 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3332 w->events &= ~EV__IOFDSET;
3333
3334 EV_FREQUENT_CHECK;
3335}
3336
3337void noinline
1325ev_io_stop (EV_P_ struct ev_io *w) 3338ev_io_stop (EV_P_ ev_io *w) EV_THROW
1326{ 3339{
1327 ev_clear_pending (EV_A_ (W)w); 3340 clear_pending (EV_A_ (W)w);
1328 if (!ev_is_active (w)) 3341 if (expect_false (!ev_is_active (w)))
1329 return; 3342 return;
1330 3343
1331 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3344 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1332 3345
3346 EV_FREQUENT_CHECK;
3347
1333 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 3348 wlist_del (&anfds[w->fd].head, (WL)w);
1334 ev_stop (EV_A_ (W)w); 3349 ev_stop (EV_A_ (W)w);
1335 3350
1336 fd_change (EV_A_ w->fd); 3351 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1337}
1338 3352
1339void 3353 EV_FREQUENT_CHECK;
3354}
3355
3356void noinline
1340ev_timer_start (EV_P_ struct ev_timer *w) 3357ev_timer_start (EV_P_ ev_timer *w) EV_THROW
1341{ 3358{
1342 if (ev_is_active (w)) 3359 if (expect_false (ev_is_active (w)))
1343 return; 3360 return;
1344 3361
1345 ((WT)w)->at += mn_now; 3362 ev_at (w) += mn_now;
1346 3363
1347 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3364 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1348 3365
3366 EV_FREQUENT_CHECK;
3367
3368 ++timercnt;
1349 ev_start (EV_A_ (W)w, ++timercnt); 3369 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1350 array_needsize (struct ev_timer *, timers, timermax, timercnt, EMPTY2); 3370 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1351 timers [timercnt - 1] = w; 3371 ANHE_w (timers [ev_active (w)]) = (WT)w;
1352 upheap ((WT *)timers, timercnt - 1); 3372 ANHE_at_cache (timers [ev_active (w)]);
3373 upheap (timers, ev_active (w));
1353 3374
3375 EV_FREQUENT_CHECK;
3376
1354 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 3377 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1355} 3378}
1356 3379
1357void 3380void noinline
1358ev_timer_stop (EV_P_ struct ev_timer *w) 3381ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
1359{ 3382{
1360 ev_clear_pending (EV_A_ (W)w); 3383 clear_pending (EV_A_ (W)w);
1361 if (!ev_is_active (w)) 3384 if (expect_false (!ev_is_active (w)))
1362 return; 3385 return;
1363 3386
3387 EV_FREQUENT_CHECK;
3388
3389 {
3390 int active = ev_active (w);
3391
1364 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 3392 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1365 3393
1366 if (((W)w)->active < timercnt--) 3394 --timercnt;
3395
3396 if (expect_true (active < timercnt + HEAP0))
1367 { 3397 {
1368 timers [((W)w)->active - 1] = timers [timercnt]; 3398 timers [active] = timers [timercnt + HEAP0];
1369 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 3399 adjustheap (timers, timercnt, active);
1370 } 3400 }
3401 }
1371 3402
1372 ((WT)w)->at -= mn_now; 3403 ev_at (w) -= mn_now;
1373 3404
1374 ev_stop (EV_A_ (W)w); 3405 ev_stop (EV_A_ (W)w);
1375}
1376 3406
1377void 3407 EV_FREQUENT_CHECK;
3408}
3409
3410void noinline
1378ev_timer_again (EV_P_ struct ev_timer *w) 3411ev_timer_again (EV_P_ ev_timer *w) EV_THROW
1379{ 3412{
3413 EV_FREQUENT_CHECK;
3414
3415 clear_pending (EV_A_ (W)w);
3416
1380 if (ev_is_active (w)) 3417 if (ev_is_active (w))
1381 { 3418 {
1382 if (w->repeat) 3419 if (w->repeat)
1383 { 3420 {
1384 ((WT)w)->at = mn_now + w->repeat; 3421 ev_at (w) = mn_now + w->repeat;
3422 ANHE_at_cache (timers [ev_active (w)]);
1385 adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1); 3423 adjustheap (timers, timercnt, ev_active (w));
1386 } 3424 }
1387 else 3425 else
1388 ev_timer_stop (EV_A_ w); 3426 ev_timer_stop (EV_A_ w);
1389 } 3427 }
1390 else if (w->repeat) 3428 else if (w->repeat)
1391 { 3429 {
1392 w->at = w->repeat; 3430 ev_at (w) = w->repeat;
1393 ev_timer_start (EV_A_ w); 3431 ev_timer_start (EV_A_ w);
1394 } 3432 }
1395}
1396 3433
3434 EV_FREQUENT_CHECK;
3435}
3436
3437ev_tstamp
3438ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3439{
3440 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3441}
3442
1397#if EV_PERIODICS 3443#if EV_PERIODIC_ENABLE
1398void 3444void noinline
1399ev_periodic_start (EV_P_ struct ev_periodic *w) 3445ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
1400{ 3446{
1401 if (ev_is_active (w)) 3447 if (expect_false (ev_is_active (w)))
1402 return; 3448 return;
1403 3449
1404 if (w->reschedule_cb) 3450 if (w->reschedule_cb)
1405 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 3451 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1406 else if (w->interval) 3452 else if (w->interval)
1407 { 3453 {
1408 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3454 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1409 /* this formula differs from the one in periodic_reify because we do not always round up */ 3455 periodic_recalc (EV_A_ w);
1410 ((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;
1411 } 3456 }
3457 else
3458 ev_at (w) = w->offset;
1412 3459
3460 EV_FREQUENT_CHECK;
3461
3462 ++periodiccnt;
1413 ev_start (EV_A_ (W)w, ++periodiccnt); 3463 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1414 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2); 3464 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1415 periodics [periodiccnt - 1] = w; 3465 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1416 upheap ((WT *)periodics, periodiccnt - 1); 3466 ANHE_at_cache (periodics [ev_active (w)]);
3467 upheap (periodics, ev_active (w));
1417 3468
3469 EV_FREQUENT_CHECK;
3470
1418 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 3471 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1419} 3472}
1420 3473
1421void 3474void noinline
1422ev_periodic_stop (EV_P_ struct ev_periodic *w) 3475ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
1423{ 3476{
1424 ev_clear_pending (EV_A_ (W)w); 3477 clear_pending (EV_A_ (W)w);
1425 if (!ev_is_active (w)) 3478 if (expect_false (!ev_is_active (w)))
1426 return; 3479 return;
1427 3480
3481 EV_FREQUENT_CHECK;
3482
3483 {
3484 int active = ev_active (w);
3485
1428 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 3486 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1429 3487
1430 if (((W)w)->active < periodiccnt--) 3488 --periodiccnt;
3489
3490 if (expect_true (active < periodiccnt + HEAP0))
1431 { 3491 {
1432 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 3492 periodics [active] = periodics [periodiccnt + HEAP0];
1433 adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 3493 adjustheap (periodics, periodiccnt, active);
1434 } 3494 }
3495 }
1435 3496
1436 ev_stop (EV_A_ (W)w); 3497 ev_stop (EV_A_ (W)w);
1437}
1438 3498
1439void 3499 EV_FREQUENT_CHECK;
3500}
3501
3502void noinline
1440ev_periodic_again (EV_P_ struct ev_periodic *w) 3503ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
1441{ 3504{
1442 /* TODO: use adjustheap and recalculation */ 3505 /* TODO: use adjustheap and recalculation */
1443 ev_periodic_stop (EV_A_ w); 3506 ev_periodic_stop (EV_A_ w);
1444 ev_periodic_start (EV_A_ w); 3507 ev_periodic_start (EV_A_ w);
1445} 3508}
1446#endif 3509#endif
1447 3510
1448void
1449ev_idle_start (EV_P_ struct ev_idle *w)
1450{
1451 if (ev_is_active (w))
1452 return;
1453
1454 ev_start (EV_A_ (W)w, ++idlecnt);
1455 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1456 idles [idlecnt - 1] = w;
1457}
1458
1459void
1460ev_idle_stop (EV_P_ struct ev_idle *w)
1461{
1462 ev_clear_pending (EV_A_ (W)w);
1463 if (!ev_is_active (w))
1464 return;
1465
1466 idles [((W)w)->active - 1] = idles [--idlecnt];
1467 ev_stop (EV_A_ (W)w);
1468}
1469
1470void
1471ev_prepare_start (EV_P_ struct ev_prepare *w)
1472{
1473 if (ev_is_active (w))
1474 return;
1475
1476 ev_start (EV_A_ (W)w, ++preparecnt);
1477 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1478 prepares [preparecnt - 1] = w;
1479}
1480
1481void
1482ev_prepare_stop (EV_P_ struct ev_prepare *w)
1483{
1484 ev_clear_pending (EV_A_ (W)w);
1485 if (!ev_is_active (w))
1486 return;
1487
1488 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1489 ev_stop (EV_A_ (W)w);
1490}
1491
1492void
1493ev_check_start (EV_P_ struct ev_check *w)
1494{
1495 if (ev_is_active (w))
1496 return;
1497
1498 ev_start (EV_A_ (W)w, ++checkcnt);
1499 array_needsize (struct ev_check *, checks, checkmax, checkcnt, EMPTY2);
1500 checks [checkcnt - 1] = w;
1501}
1502
1503void
1504ev_check_stop (EV_P_ struct ev_check *w)
1505{
1506 ev_clear_pending (EV_A_ (W)w);
1507 if (!ev_is_active (w))
1508 return;
1509
1510 checks [((W)w)->active - 1] = checks [--checkcnt];
1511 ev_stop (EV_A_ (W)w);
1512}
1513
1514#ifndef SA_RESTART 3511#ifndef SA_RESTART
1515# define SA_RESTART 0 3512# define SA_RESTART 0
1516#endif 3513#endif
1517 3514
3515#if EV_SIGNAL_ENABLE
3516
3517void noinline
3518ev_signal_start (EV_P_ ev_signal *w) EV_THROW
3519{
3520 if (expect_false (ev_is_active (w)))
3521 return;
3522
3523 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3524
3525#if EV_MULTIPLICITY
3526 assert (("libev: a signal must not be attached to two different loops",
3527 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3528
3529 signals [w->signum - 1].loop = EV_A;
3530#endif
3531
3532 EV_FREQUENT_CHECK;
3533
3534#if EV_USE_SIGNALFD
3535 if (sigfd == -2)
3536 {
3537 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3538 if (sigfd < 0 && errno == EINVAL)
3539 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3540
3541 if (sigfd >= 0)
3542 {
3543 fd_intern (sigfd); /* doing it twice will not hurt */
3544
3545 sigemptyset (&sigfd_set);
3546
3547 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3548 ev_set_priority (&sigfd_w, EV_MAXPRI);
3549 ev_io_start (EV_A_ &sigfd_w);
3550 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3551 }
3552 }
3553
3554 if (sigfd >= 0)
3555 {
3556 /* TODO: check .head */
3557 sigaddset (&sigfd_set, w->signum);
3558 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3559
3560 signalfd (sigfd, &sigfd_set, 0);
3561 }
3562#endif
3563
3564 ev_start (EV_A_ (W)w, 1);
3565 wlist_add (&signals [w->signum - 1].head, (WL)w);
3566
3567 if (!((WL)w)->next)
3568# if EV_USE_SIGNALFD
3569 if (sigfd < 0) /*TODO*/
3570# endif
3571 {
3572# ifdef _WIN32
3573 evpipe_init (EV_A);
3574
3575 signal (w->signum, ev_sighandler);
3576# else
3577 struct sigaction sa;
3578
3579 evpipe_init (EV_A);
3580
3581 sa.sa_handler = ev_sighandler;
3582 sigfillset (&sa.sa_mask);
3583 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3584 sigaction (w->signum, &sa, 0);
3585
3586 if (origflags & EVFLAG_NOSIGMASK)
3587 {
3588 sigemptyset (&sa.sa_mask);
3589 sigaddset (&sa.sa_mask, w->signum);
3590 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3591 }
3592#endif
3593 }
3594
3595 EV_FREQUENT_CHECK;
3596}
3597
3598void noinline
3599ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
3600{
3601 clear_pending (EV_A_ (W)w);
3602 if (expect_false (!ev_is_active (w)))
3603 return;
3604
3605 EV_FREQUENT_CHECK;
3606
3607 wlist_del (&signals [w->signum - 1].head, (WL)w);
3608 ev_stop (EV_A_ (W)w);
3609
3610 if (!signals [w->signum - 1].head)
3611 {
3612#if EV_MULTIPLICITY
3613 signals [w->signum - 1].loop = 0; /* unattach from signal */
3614#endif
3615#if EV_USE_SIGNALFD
3616 if (sigfd >= 0)
3617 {
3618 sigset_t ss;
3619
3620 sigemptyset (&ss);
3621 sigaddset (&ss, w->signum);
3622 sigdelset (&sigfd_set, w->signum);
3623
3624 signalfd (sigfd, &sigfd_set, 0);
3625 sigprocmask (SIG_UNBLOCK, &ss, 0);
3626 }
3627 else
3628#endif
3629 signal (w->signum, SIG_DFL);
3630 }
3631
3632 EV_FREQUENT_CHECK;
3633}
3634
3635#endif
3636
3637#if EV_CHILD_ENABLE
3638
1518void 3639void
1519ev_signal_start (EV_P_ struct ev_signal *w) 3640ev_child_start (EV_P_ ev_child *w) EV_THROW
1520{ 3641{
1521#if EV_MULTIPLICITY 3642#if EV_MULTIPLICITY
1522 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 3643 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1523#endif 3644#endif
1524 if (ev_is_active (w)) 3645 if (expect_false (ev_is_active (w)))
1525 return; 3646 return;
1526 3647
1527 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3648 EV_FREQUENT_CHECK;
1528 3649
1529 ev_start (EV_A_ (W)w, 1); 3650 ev_start (EV_A_ (W)w, 1);
1530 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 3651 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1531 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1532 3652
1533 if (!((WL)w)->next) 3653 EV_FREQUENT_CHECK;
3654}
3655
3656void
3657ev_child_stop (EV_P_ ev_child *w) EV_THROW
3658{
3659 clear_pending (EV_A_ (W)w);
3660 if (expect_false (!ev_is_active (w)))
3661 return;
3662
3663 EV_FREQUENT_CHECK;
3664
3665 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3666 ev_stop (EV_A_ (W)w);
3667
3668 EV_FREQUENT_CHECK;
3669}
3670
3671#endif
3672
3673#if EV_STAT_ENABLE
3674
3675# ifdef _WIN32
3676# undef lstat
3677# define lstat(a,b) _stati64 (a,b)
3678# endif
3679
3680#define DEF_STAT_INTERVAL 5.0074891
3681#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3682#define MIN_STAT_INTERVAL 0.1074891
3683
3684static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3685
3686#if EV_USE_INOTIFY
3687
3688/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3689# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3690
3691static void noinline
3692infy_add (EV_P_ ev_stat *w)
3693{
3694 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);
3695
3696 if (w->wd >= 0)
3697 {
3698 struct statfs sfs;
3699
3700 /* now local changes will be tracked by inotify, but remote changes won't */
3701 /* unless the filesystem is known to be local, we therefore still poll */
3702 /* also do poll on <2.6.25, but with normal frequency */
3703
3704 if (!fs_2625)
3705 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3706 else if (!statfs (w->path, &sfs)
3707 && (sfs.f_type == 0x1373 /* devfs */
3708 || sfs.f_type == 0xEF53 /* ext2/3 */
3709 || sfs.f_type == 0x3153464a /* jfs */
3710 || sfs.f_type == 0x52654973 /* reiser3 */
3711 || sfs.f_type == 0x01021994 /* tempfs */
3712 || sfs.f_type == 0x58465342 /* xfs */))
3713 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3714 else
3715 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1534 { 3716 }
3717 else
3718 {
3719 /* can't use inotify, continue to stat */
3720 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3721
3722 /* if path is not there, monitor some parent directory for speedup hints */
3723 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3724 /* but an efficiency issue only */
3725 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
3726 {
3727 char path [4096];
3728 strcpy (path, w->path);
3729
3730 do
3731 {
3732 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
3733 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
3734
3735 char *pend = strrchr (path, '/');
3736
3737 if (!pend || pend == path)
3738 break;
3739
3740 *pend = 0;
3741 w->wd = inotify_add_watch (fs_fd, path, mask);
3742 }
3743 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3744 }
3745 }
3746
3747 if (w->wd >= 0)
3748 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3749
3750 /* now re-arm timer, if required */
3751 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3752 ev_timer_again (EV_A_ &w->timer);
3753 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3754}
3755
3756static void noinline
3757infy_del (EV_P_ ev_stat *w)
3758{
3759 int slot;
3760 int wd = w->wd;
3761
3762 if (wd < 0)
3763 return;
3764
3765 w->wd = -2;
3766 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3767 wlist_del (&fs_hash [slot].head, (WL)w);
3768
3769 /* remove this watcher, if others are watching it, they will rearm */
3770 inotify_rm_watch (fs_fd, wd);
3771}
3772
3773static void noinline
3774infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3775{
3776 if (slot < 0)
3777 /* overflow, need to check for all hash slots */
3778 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3779 infy_wd (EV_A_ slot, wd, ev);
3780 else
3781 {
3782 WL w_;
3783
3784 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3785 {
3786 ev_stat *w = (ev_stat *)w_;
3787 w_ = w_->next; /* lets us remove this watcher and all before it */
3788
3789 if (w->wd == wd || wd == -1)
3790 {
3791 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3792 {
3793 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3794 w->wd = -1;
3795 infy_add (EV_A_ w); /* re-add, no matter what */
3796 }
3797
3798 stat_timer_cb (EV_A_ &w->timer, 0);
3799 }
3800 }
3801 }
3802}
3803
3804static void
3805infy_cb (EV_P_ ev_io *w, int revents)
3806{
3807 char buf [EV_INOTIFY_BUFSIZE];
3808 int ofs;
3809 int len = read (fs_fd, buf, sizeof (buf));
3810
3811 for (ofs = 0; ofs < len; )
3812 {
3813 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3814 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3815 ofs += sizeof (struct inotify_event) + ev->len;
3816 }
3817}
3818
3819inline_size void ecb_cold
3820ev_check_2625 (EV_P)
3821{
3822 /* kernels < 2.6.25 are borked
3823 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3824 */
3825 if (ev_linux_version () < 0x020619)
3826 return;
3827
3828 fs_2625 = 1;
3829}
3830
3831inline_size int
3832infy_newfd (void)
3833{
3834#if defined IN_CLOEXEC && defined IN_NONBLOCK
3835 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3836 if (fd >= 0)
3837 return fd;
3838#endif
3839 return inotify_init ();
3840}
3841
3842inline_size void
3843infy_init (EV_P)
3844{
3845 if (fs_fd != -2)
3846 return;
3847
3848 fs_fd = -1;
3849
3850 ev_check_2625 (EV_A);
3851
3852 fs_fd = infy_newfd ();
3853
3854 if (fs_fd >= 0)
3855 {
3856 fd_intern (fs_fd);
3857 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3858 ev_set_priority (&fs_w, EV_MAXPRI);
3859 ev_io_start (EV_A_ &fs_w);
3860 ev_unref (EV_A);
3861 }
3862}
3863
3864inline_size void
3865infy_fork (EV_P)
3866{
3867 int slot;
3868
3869 if (fs_fd < 0)
3870 return;
3871
3872 ev_ref (EV_A);
3873 ev_io_stop (EV_A_ &fs_w);
3874 close (fs_fd);
3875 fs_fd = infy_newfd ();
3876
3877 if (fs_fd >= 0)
3878 {
3879 fd_intern (fs_fd);
3880 ev_io_set (&fs_w, fs_fd, EV_READ);
3881 ev_io_start (EV_A_ &fs_w);
3882 ev_unref (EV_A);
3883 }
3884
3885 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3886 {
3887 WL w_ = fs_hash [slot].head;
3888 fs_hash [slot].head = 0;
3889
3890 while (w_)
3891 {
3892 ev_stat *w = (ev_stat *)w_;
3893 w_ = w_->next; /* lets us add this watcher */
3894
3895 w->wd = -1;
3896
3897 if (fs_fd >= 0)
3898 infy_add (EV_A_ w); /* re-add, no matter what */
3899 else
3900 {
3901 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3902 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3903 ev_timer_again (EV_A_ &w->timer);
3904 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3905 }
3906 }
3907 }
3908}
3909
3910#endif
3911
1535#if _WIN32 3912#ifdef _WIN32
1536 signal (w->signum, sighandler); 3913# define EV_LSTAT(p,b) _stati64 (p, b)
1537#else 3914#else
1538 struct sigaction sa; 3915# define EV_LSTAT(p,b) lstat (p, b)
1539 sa.sa_handler = sighandler;
1540 sigfillset (&sa.sa_mask);
1541 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1542 sigaction (w->signum, &sa, 0);
1543#endif 3916#endif
1544 }
1545}
1546 3917
1547void 3918void
1548ev_signal_stop (EV_P_ struct ev_signal *w) 3919ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
1549{ 3920{
1550 ev_clear_pending (EV_A_ (W)w); 3921 if (lstat (w->path, &w->attr) < 0)
1551 if (!ev_is_active (w)) 3922 w->attr.st_nlink = 0;
3923 else if (!w->attr.st_nlink)
3924 w->attr.st_nlink = 1;
3925}
3926
3927static void noinline
3928stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3929{
3930 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3931
3932 ev_statdata prev = w->attr;
3933 ev_stat_stat (EV_A_ w);
3934
3935 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3936 if (
3937 prev.st_dev != w->attr.st_dev
3938 || prev.st_ino != w->attr.st_ino
3939 || prev.st_mode != w->attr.st_mode
3940 || prev.st_nlink != w->attr.st_nlink
3941 || prev.st_uid != w->attr.st_uid
3942 || prev.st_gid != w->attr.st_gid
3943 || prev.st_rdev != w->attr.st_rdev
3944 || prev.st_size != w->attr.st_size
3945 || prev.st_atime != w->attr.st_atime
3946 || prev.st_mtime != w->attr.st_mtime
3947 || prev.st_ctime != w->attr.st_ctime
3948 ) {
3949 /* we only update w->prev on actual differences */
3950 /* in case we test more often than invoke the callback, */
3951 /* to ensure that prev is always different to attr */
3952 w->prev = prev;
3953
3954 #if EV_USE_INOTIFY
3955 if (fs_fd >= 0)
3956 {
3957 infy_del (EV_A_ w);
3958 infy_add (EV_A_ w);
3959 ev_stat_stat (EV_A_ w); /* avoid race... */
3960 }
3961 #endif
3962
3963 ev_feed_event (EV_A_ w, EV_STAT);
3964 }
3965}
3966
3967void
3968ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3969{
3970 if (expect_false (ev_is_active (w)))
1552 return; 3971 return;
1553 3972
1554 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3973 ev_stat_stat (EV_A_ w);
3974
3975 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3976 w->interval = MIN_STAT_INTERVAL;
3977
3978 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3979 ev_set_priority (&w->timer, ev_priority (w));
3980
3981#if EV_USE_INOTIFY
3982 infy_init (EV_A);
3983
3984 if (fs_fd >= 0)
3985 infy_add (EV_A_ w);
3986 else
3987#endif
3988 {
3989 ev_timer_again (EV_A_ &w->timer);
3990 ev_unref (EV_A);
3991 }
3992
3993 ev_start (EV_A_ (W)w, 1);
3994
3995 EV_FREQUENT_CHECK;
3996}
3997
3998void
3999ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
4000{
4001 clear_pending (EV_A_ (W)w);
4002 if (expect_false (!ev_is_active (w)))
4003 return;
4004
4005 EV_FREQUENT_CHECK;
4006
4007#if EV_USE_INOTIFY
4008 infy_del (EV_A_ w);
4009#endif
4010
4011 if (ev_is_active (&w->timer))
4012 {
4013 ev_ref (EV_A);
4014 ev_timer_stop (EV_A_ &w->timer);
4015 }
4016
1555 ev_stop (EV_A_ (W)w); 4017 ev_stop (EV_A_ (W)w);
1556 4018
1557 if (!signals [w->signum - 1].head) 4019 EV_FREQUENT_CHECK;
1558 signal (w->signum, SIG_DFL);
1559} 4020}
4021#endif
1560 4022
4023#if EV_IDLE_ENABLE
1561void 4024void
1562ev_child_start (EV_P_ struct ev_child *w) 4025ev_idle_start (EV_P_ ev_idle *w) EV_THROW
1563{ 4026{
1564#if EV_MULTIPLICITY
1565 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1566#endif
1567 if (ev_is_active (w)) 4027 if (expect_false (ev_is_active (w)))
1568 return; 4028 return;
1569 4029
4030 pri_adjust (EV_A_ (W)w);
4031
4032 EV_FREQUENT_CHECK;
4033
4034 {
4035 int active = ++idlecnt [ABSPRI (w)];
4036
4037 ++idleall;
4038 ev_start (EV_A_ (W)w, active);
4039
4040 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
4041 idles [ABSPRI (w)][active - 1] = w;
4042 }
4043
4044 EV_FREQUENT_CHECK;
4045}
4046
4047void
4048ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
4049{
4050 clear_pending (EV_A_ (W)w);
4051 if (expect_false (!ev_is_active (w)))
4052 return;
4053
4054 EV_FREQUENT_CHECK;
4055
4056 {
4057 int active = ev_active (w);
4058
4059 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
4060 ev_active (idles [ABSPRI (w)][active - 1]) = active;
4061
4062 ev_stop (EV_A_ (W)w);
4063 --idleall;
4064 }
4065
4066 EV_FREQUENT_CHECK;
4067}
4068#endif
4069
4070#if EV_PREPARE_ENABLE
4071void
4072ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
4073{
4074 if (expect_false (ev_is_active (w)))
4075 return;
4076
4077 EV_FREQUENT_CHECK;
4078
4079 ev_start (EV_A_ (W)w, ++preparecnt);
4080 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
4081 prepares [preparecnt - 1] = w;
4082
4083 EV_FREQUENT_CHECK;
4084}
4085
4086void
4087ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
4088{
4089 clear_pending (EV_A_ (W)w);
4090 if (expect_false (!ev_is_active (w)))
4091 return;
4092
4093 EV_FREQUENT_CHECK;
4094
4095 {
4096 int active = ev_active (w);
4097
4098 prepares [active - 1] = prepares [--preparecnt];
4099 ev_active (prepares [active - 1]) = active;
4100 }
4101
4102 ev_stop (EV_A_ (W)w);
4103
4104 EV_FREQUENT_CHECK;
4105}
4106#endif
4107
4108#if EV_CHECK_ENABLE
4109void
4110ev_check_start (EV_P_ ev_check *w) EV_THROW
4111{
4112 if (expect_false (ev_is_active (w)))
4113 return;
4114
4115 EV_FREQUENT_CHECK;
4116
4117 ev_start (EV_A_ (W)w, ++checkcnt);
4118 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
4119 checks [checkcnt - 1] = w;
4120
4121 EV_FREQUENT_CHECK;
4122}
4123
4124void
4125ev_check_stop (EV_P_ ev_check *w) EV_THROW
4126{
4127 clear_pending (EV_A_ (W)w);
4128 if (expect_false (!ev_is_active (w)))
4129 return;
4130
4131 EV_FREQUENT_CHECK;
4132
4133 {
4134 int active = ev_active (w);
4135
4136 checks [active - 1] = checks [--checkcnt];
4137 ev_active (checks [active - 1]) = active;
4138 }
4139
4140 ev_stop (EV_A_ (W)w);
4141
4142 EV_FREQUENT_CHECK;
4143}
4144#endif
4145
4146#if EV_EMBED_ENABLE
4147void noinline
4148ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
4149{
4150 ev_run (w->other, EVRUN_NOWAIT);
4151}
4152
4153static void
4154embed_io_cb (EV_P_ ev_io *io, int revents)
4155{
4156 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
4157
4158 if (ev_cb (w))
4159 ev_feed_event (EV_A_ (W)w, EV_EMBED);
4160 else
4161 ev_run (w->other, EVRUN_NOWAIT);
4162}
4163
4164static void
4165embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4166{
4167 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4168
4169 {
4170 EV_P = w->other;
4171
4172 while (fdchangecnt)
4173 {
4174 fd_reify (EV_A);
4175 ev_run (EV_A_ EVRUN_NOWAIT);
4176 }
4177 }
4178}
4179
4180static void
4181embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4182{
4183 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4184
4185 ev_embed_stop (EV_A_ w);
4186
4187 {
4188 EV_P = w->other;
4189
4190 ev_loop_fork (EV_A);
4191 ev_run (EV_A_ EVRUN_NOWAIT);
4192 }
4193
4194 ev_embed_start (EV_A_ w);
4195}
4196
4197#if 0
4198static void
4199embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4200{
4201 ev_idle_stop (EV_A_ idle);
4202}
4203#endif
4204
4205void
4206ev_embed_start (EV_P_ ev_embed *w) EV_THROW
4207{
4208 if (expect_false (ev_is_active (w)))
4209 return;
4210
4211 {
4212 EV_P = w->other;
4213 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4214 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4215 }
4216
4217 EV_FREQUENT_CHECK;
4218
4219 ev_set_priority (&w->io, ev_priority (w));
4220 ev_io_start (EV_A_ &w->io);
4221
4222 ev_prepare_init (&w->prepare, embed_prepare_cb);
4223 ev_set_priority (&w->prepare, EV_MINPRI);
4224 ev_prepare_start (EV_A_ &w->prepare);
4225
4226 ev_fork_init (&w->fork, embed_fork_cb);
4227 ev_fork_start (EV_A_ &w->fork);
4228
4229 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4230
1570 ev_start (EV_A_ (W)w, 1); 4231 ev_start (EV_A_ (W)w, 1);
1571 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 4232
4233 EV_FREQUENT_CHECK;
1572} 4234}
1573 4235
1574void 4236void
1575ev_child_stop (EV_P_ struct ev_child *w) 4237ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
1576{ 4238{
1577 ev_clear_pending (EV_A_ (W)w); 4239 clear_pending (EV_A_ (W)w);
1578 if (!ev_is_active (w)) 4240 if (expect_false (!ev_is_active (w)))
1579 return; 4241 return;
1580 4242
1581 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 4243 EV_FREQUENT_CHECK;
4244
4245 ev_io_stop (EV_A_ &w->io);
4246 ev_prepare_stop (EV_A_ &w->prepare);
4247 ev_fork_stop (EV_A_ &w->fork);
4248
1582 ev_stop (EV_A_ (W)w); 4249 ev_stop (EV_A_ (W)w);
4250
4251 EV_FREQUENT_CHECK;
1583} 4252}
4253#endif
4254
4255#if EV_FORK_ENABLE
4256void
4257ev_fork_start (EV_P_ ev_fork *w) EV_THROW
4258{
4259 if (expect_false (ev_is_active (w)))
4260 return;
4261
4262 EV_FREQUENT_CHECK;
4263
4264 ev_start (EV_A_ (W)w, ++forkcnt);
4265 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4266 forks [forkcnt - 1] = w;
4267
4268 EV_FREQUENT_CHECK;
4269}
4270
4271void
4272ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
4273{
4274 clear_pending (EV_A_ (W)w);
4275 if (expect_false (!ev_is_active (w)))
4276 return;
4277
4278 EV_FREQUENT_CHECK;
4279
4280 {
4281 int active = ev_active (w);
4282
4283 forks [active - 1] = forks [--forkcnt];
4284 ev_active (forks [active - 1]) = active;
4285 }
4286
4287 ev_stop (EV_A_ (W)w);
4288
4289 EV_FREQUENT_CHECK;
4290}
4291#endif
4292
4293#if EV_CLEANUP_ENABLE
4294void
4295ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4296{
4297 if (expect_false (ev_is_active (w)))
4298 return;
4299
4300 EV_FREQUENT_CHECK;
4301
4302 ev_start (EV_A_ (W)w, ++cleanupcnt);
4303 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4304 cleanups [cleanupcnt - 1] = w;
4305
4306 /* cleanup watchers should never keep a refcount on the loop */
4307 ev_unref (EV_A);
4308 EV_FREQUENT_CHECK;
4309}
4310
4311void
4312ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4313{
4314 clear_pending (EV_A_ (W)w);
4315 if (expect_false (!ev_is_active (w)))
4316 return;
4317
4318 EV_FREQUENT_CHECK;
4319 ev_ref (EV_A);
4320
4321 {
4322 int active = ev_active (w);
4323
4324 cleanups [active - 1] = cleanups [--cleanupcnt];
4325 ev_active (cleanups [active - 1]) = active;
4326 }
4327
4328 ev_stop (EV_A_ (W)w);
4329
4330 EV_FREQUENT_CHECK;
4331}
4332#endif
4333
4334#if EV_ASYNC_ENABLE
4335void
4336ev_async_start (EV_P_ ev_async *w) EV_THROW
4337{
4338 if (expect_false (ev_is_active (w)))
4339 return;
4340
4341 w->sent = 0;
4342
4343 evpipe_init (EV_A);
4344
4345 EV_FREQUENT_CHECK;
4346
4347 ev_start (EV_A_ (W)w, ++asynccnt);
4348 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4349 asyncs [asynccnt - 1] = w;
4350
4351 EV_FREQUENT_CHECK;
4352}
4353
4354void
4355ev_async_stop (EV_P_ ev_async *w) EV_THROW
4356{
4357 clear_pending (EV_A_ (W)w);
4358 if (expect_false (!ev_is_active (w)))
4359 return;
4360
4361 EV_FREQUENT_CHECK;
4362
4363 {
4364 int active = ev_active (w);
4365
4366 asyncs [active - 1] = asyncs [--asynccnt];
4367 ev_active (asyncs [active - 1]) = active;
4368 }
4369
4370 ev_stop (EV_A_ (W)w);
4371
4372 EV_FREQUENT_CHECK;
4373}
4374
4375void
4376ev_async_send (EV_P_ ev_async *w) EV_THROW
4377{
4378 w->sent = 1;
4379 evpipe_write (EV_A_ &async_pending);
4380}
4381#endif
1584 4382
1585/*****************************************************************************/ 4383/*****************************************************************************/
1586 4384
1587struct ev_once 4385struct ev_once
1588{ 4386{
1589 struct ev_io io; 4387 ev_io io;
1590 struct ev_timer to; 4388 ev_timer to;
1591 void (*cb)(int revents, void *arg); 4389 void (*cb)(int revents, void *arg);
1592 void *arg; 4390 void *arg;
1593}; 4391};
1594 4392
1595static void 4393static void
1596once_cb (EV_P_ struct ev_once *once, int revents) 4394once_cb (EV_P_ struct ev_once *once, int revents)
1597{ 4395{
1598 void (*cb)(int revents, void *arg) = once->cb; 4396 void (*cb)(int revents, void *arg) = once->cb;
1599 void *arg = once->arg; 4397 void *arg = once->arg;
1600 4398
1601 ev_io_stop (EV_A_ &once->io); 4399 ev_io_stop (EV_A_ &once->io);
1602 ev_timer_stop (EV_A_ &once->to); 4400 ev_timer_stop (EV_A_ &once->to);
1603 ev_free (once); 4401 ev_free (once);
1604 4402
1605 cb (revents, arg); 4403 cb (revents, arg);
1606} 4404}
1607 4405
1608static void 4406static void
1609once_cb_io (EV_P_ struct ev_io *w, int revents) 4407once_cb_io (EV_P_ ev_io *w, int revents)
1610{ 4408{
1611 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4409 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4410
4411 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1612} 4412}
1613 4413
1614static void 4414static void
1615once_cb_to (EV_P_ struct ev_timer *w, int revents) 4415once_cb_to (EV_P_ ev_timer *w, int revents)
1616{ 4416{
1617 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4417 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4418
4419 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1618} 4420}
1619 4421
1620void 4422void
1621ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4423ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
1622{ 4424{
1623 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4425 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1624 4426
1625 if (!once) 4427 if (expect_false (!once))
4428 {
1626 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4429 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1627 else 4430 return;
1628 { 4431 }
4432
1629 once->cb = cb; 4433 once->cb = cb;
1630 once->arg = arg; 4434 once->arg = arg;
1631 4435
1632 ev_init (&once->io, once_cb_io); 4436 ev_init (&once->io, once_cb_io);
1633 if (fd >= 0) 4437 if (fd >= 0)
4438 {
4439 ev_io_set (&once->io, fd, events);
4440 ev_io_start (EV_A_ &once->io);
4441 }
4442
4443 ev_init (&once->to, once_cb_to);
4444 if (timeout >= 0.)
4445 {
4446 ev_timer_set (&once->to, timeout, 0.);
4447 ev_timer_start (EV_A_ &once->to);
4448 }
4449}
4450
4451/*****************************************************************************/
4452
4453#if EV_WALK_ENABLE
4454void ecb_cold
4455ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4456{
4457 int i, j;
4458 ev_watcher_list *wl, *wn;
4459
4460 if (types & (EV_IO | EV_EMBED))
4461 for (i = 0; i < anfdmax; ++i)
4462 for (wl = anfds [i].head; wl; )
1634 { 4463 {
1635 ev_io_set (&once->io, fd, events); 4464 wn = wl->next;
1636 ev_io_start (EV_A_ &once->io); 4465
4466#if EV_EMBED_ENABLE
4467 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4468 {
4469 if (types & EV_EMBED)
4470 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4471 }
4472 else
4473#endif
4474#if EV_USE_INOTIFY
4475 if (ev_cb ((ev_io *)wl) == infy_cb)
4476 ;
4477 else
4478#endif
4479 if ((ev_io *)wl != &pipe_w)
4480 if (types & EV_IO)
4481 cb (EV_A_ EV_IO, wl);
4482
4483 wl = wn;
1637 } 4484 }
1638 4485
1639 ev_init (&once->to, once_cb_to); 4486 if (types & (EV_TIMER | EV_STAT))
1640 if (timeout >= 0.) 4487 for (i = timercnt + HEAP0; i-- > HEAP0; )
4488#if EV_STAT_ENABLE
4489 /*TODO: timer is not always active*/
4490 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1641 { 4491 {
1642 ev_timer_set (&once->to, timeout, 0.); 4492 if (types & EV_STAT)
1643 ev_timer_start (EV_A_ &once->to); 4493 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1644 } 4494 }
1645 } 4495 else
1646} 4496#endif
4497 if (types & EV_TIMER)
4498 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1647 4499
1648#ifdef __cplusplus 4500#if EV_PERIODIC_ENABLE
1649} 4501 if (types & EV_PERIODIC)
4502 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4503 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4504#endif
4505
4506#if EV_IDLE_ENABLE
4507 if (types & EV_IDLE)
4508 for (j = NUMPRI; j--; )
4509 for (i = idlecnt [j]; i--; )
4510 cb (EV_A_ EV_IDLE, idles [j][i]);
4511#endif
4512
4513#if EV_FORK_ENABLE
4514 if (types & EV_FORK)
4515 for (i = forkcnt; i--; )
4516 if (ev_cb (forks [i]) != embed_fork_cb)
4517 cb (EV_A_ EV_FORK, forks [i]);
4518#endif
4519
4520#if EV_ASYNC_ENABLE
4521 if (types & EV_ASYNC)
4522 for (i = asynccnt; i--; )
4523 cb (EV_A_ EV_ASYNC, asyncs [i]);
4524#endif
4525
4526#if EV_PREPARE_ENABLE
4527 if (types & EV_PREPARE)
4528 for (i = preparecnt; i--; )
4529# if EV_EMBED_ENABLE
4530 if (ev_cb (prepares [i]) != embed_prepare_cb)
1650#endif 4531# endif
4532 cb (EV_A_ EV_PREPARE, prepares [i]);
4533#endif
1651 4534
4535#if EV_CHECK_ENABLE
4536 if (types & EV_CHECK)
4537 for (i = checkcnt; i--; )
4538 cb (EV_A_ EV_CHECK, checks [i]);
4539#endif
4540
4541#if EV_SIGNAL_ENABLE
4542 if (types & EV_SIGNAL)
4543 for (i = 0; i < EV_NSIG - 1; ++i)
4544 for (wl = signals [i].head; wl; )
4545 {
4546 wn = wl->next;
4547 cb (EV_A_ EV_SIGNAL, wl);
4548 wl = wn;
4549 }
4550#endif
4551
4552#if EV_CHILD_ENABLE
4553 if (types & EV_CHILD)
4554 for (i = (EV_PID_HASHSIZE); i--; )
4555 for (wl = childs [i]; wl; )
4556 {
4557 wn = wl->next;
4558 cb (EV_A_ EV_CHILD, wl);
4559 wl = wn;
4560 }
4561#endif
4562/* EV_STAT 0x00001000 /* stat data changed */
4563/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4564}
4565#endif
4566
4567#if EV_MULTIPLICITY
4568 #include "ev_wrap.h"
4569#endif
4570

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