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Comparing libev/ev.c (file contents):
Revision 1.79 by root, Fri Nov 9 15:15:20 2007 UTC vs.
Revision 1.445 by root, Sat Jun 2 11:15:29 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 */
39
40/* this big block deduces configuration from config.h */
31#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H
44# else
32# include "config.h" 45# include "config.h"
46# endif
47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined EV_USE_CLOCK_SYSCALL
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
33 67
34# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
69# ifndef EV_USE_MONOTONIC
35# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
71# endif
72# ifndef EV_USE_REALTIME
36# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
74# endif
75# else
76# ifndef EV_USE_MONOTONIC
77# define EV_USE_MONOTONIC 0
78# endif
79# ifndef EV_USE_REALTIME
80# define EV_USE_REALTIME 0
81# endif
37# endif 82# endif
38 83
84# if HAVE_NANOSLEEP
85# ifndef EV_USE_NANOSLEEP
86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
88# else
89# undef EV_USE_NANOSLEEP
90# define EV_USE_NANOSLEEP 0
91# endif
92
39# if HAVE_SELECT && HAVE_SYS_SELECT_H 93# if HAVE_SELECT && HAVE_SYS_SELECT_H
94# ifndef EV_USE_SELECT
95# define EV_USE_SELECT EV_FEATURE_BACKENDS
96# endif
97# else
98# undef EV_USE_SELECT
40# define EV_USE_SELECT 1 99# define EV_USE_SELECT 0
41# endif 100# endif
42 101
43# if HAVE_POLL && HAVE_POLL_H 102# if HAVE_POLL && HAVE_POLL_H
103# ifndef EV_USE_POLL
104# define EV_USE_POLL EV_FEATURE_BACKENDS
105# endif
106# else
107# undef EV_USE_POLL
44# define EV_USE_POLL 1 108# define EV_USE_POLL 0
45# endif 109# endif
46 110
47# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
112# ifndef EV_USE_EPOLL
113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
114# endif
115# else
116# undef EV_USE_EPOLL
48# define EV_USE_EPOLL 1 117# define EV_USE_EPOLL 0
49# endif 118# endif
50 119
51# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
121# ifndef EV_USE_KQUEUE
122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
123# endif
124# else
125# undef EV_USE_KQUEUE
52# define EV_USE_KQUEUE 1 126# define EV_USE_KQUEUE 0
53# endif 127# endif
54 128
129# if HAVE_PORT_H && HAVE_PORT_CREATE
130# ifndef EV_USE_PORT
131# define EV_USE_PORT EV_FEATURE_BACKENDS
132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
55#endif 136# endif
56 137
57#include <math.h> 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
139# ifndef EV_USE_INOTIFY
140# define EV_USE_INOTIFY EV_FEATURE_OS
141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
145# endif
146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
149# define EV_USE_SIGNALFD EV_FEATURE_OS
150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
154# endif
155
156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
163# endif
164
165#endif
166
58#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
59#include <fcntl.h> 169#include <fcntl.h>
60#include <stddef.h> 170#include <stddef.h>
61 171
62#include <stdio.h> 172#include <stdio.h>
63 173
64#include <assert.h> 174#include <assert.h>
65#include <errno.h> 175#include <errno.h>
66#include <sys/types.h> 176#include <sys/types.h>
67#include <time.h> 177#include <time.h>
178#include <limits.h>
68 179
69#include <signal.h> 180#include <signal.h>
70 181
182#ifdef EV_H
183# include EV_H
184#else
185# include "ev.h"
186#endif
187
188#if EV_NO_THREADS
189# undef EV_NO_SMP
190# define EV_NO_SMP 1
191# undef ECB_NO_THREADS
192# define ECB_NO_THREADS 1
193#endif
194#if EV_NO_SMP
195# undef EV_NO_SMP
196# define ECB_NO_SMP 1
197#endif
198
71#ifndef WIN32 199#ifndef _WIN32
72# include <unistd.h>
73# include <sys/time.h> 200# include <sys/time.h>
74# include <sys/wait.h> 201# include <sys/wait.h>
202# include <unistd.h>
203#else
204# include <io.h>
205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
207# include <windows.h>
208# ifndef EV_SELECT_IS_WINSOCKET
209# define EV_SELECT_IS_WINSOCKET 1
75#endif 210# endif
76/**/ 211# undef EV_AVOID_STDIO
212#endif
213
214/* OS X, in its infinite idiocy, actually HARDCODES
215 * a limit of 1024 into their select. Where people have brains,
216 * OS X engineers apparently have a vacuum. Or maybe they were
217 * ordered to have a vacuum, or they do anything for money.
218 * This might help. Or not.
219 */
220#define _DARWIN_UNLIMITED_SELECT 1
221
222/* this block tries to deduce configuration from header-defined symbols and defaults */
223
224/* try to deduce the maximum number of signals on this platform */
225#if defined EV_NSIG
226/* use what's provided */
227#elif defined NSIG
228# define EV_NSIG (NSIG)
229#elif defined _NSIG
230# define EV_NSIG (_NSIG)
231#elif defined SIGMAX
232# define EV_NSIG (SIGMAX+1)
233#elif defined SIG_MAX
234# define EV_NSIG (SIG_MAX+1)
235#elif defined _SIG_MAX
236# define EV_NSIG (_SIG_MAX+1)
237#elif defined MAXSIG
238# define EV_NSIG (MAXSIG+1)
239#elif defined MAX_SIG
240# define EV_NSIG (MAX_SIG+1)
241#elif defined SIGARRAYSIZE
242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
243#elif defined _sys_nsig
244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
245#else
246# 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
261# endif
262#endif
77 263
78#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
79# 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
80#endif 282#endif
81 283
82#ifndef EV_USE_SELECT 284#ifndef EV_USE_SELECT
83# define EV_USE_SELECT 1 285# define EV_USE_SELECT EV_FEATURE_BACKENDS
84#endif 286#endif
85 287
86#ifndef EV_USE_POLL 288#ifndef EV_USE_POLL
87# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ 289# ifdef _WIN32
290# define EV_USE_POLL 0
291# else
292# define EV_USE_POLL EV_FEATURE_BACKENDS
293# endif
88#endif 294#endif
89 295
90#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
91# define EV_USE_EPOLL 0 300# define EV_USE_EPOLL 0
301# endif
92#endif 302#endif
93 303
94#ifndef EV_USE_KQUEUE 304#ifndef EV_USE_KQUEUE
95# define EV_USE_KQUEUE 0 305# define EV_USE_KQUEUE 0
96#endif 306#endif
97 307
308#ifndef EV_USE_PORT
309# define EV_USE_PORT 0
310#endif
311
98#ifndef EV_USE_WIN32 312#ifndef EV_USE_INOTIFY
99# ifdef WIN32 313# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
100# define EV_USE_WIN32 0 /* it does not exist, use select */ 314# define EV_USE_INOTIFY EV_FEATURE_OS
101# undef EV_USE_SELECT
102# define EV_USE_SELECT 1
103# else 315# else
104# define EV_USE_WIN32 0 316# define EV_USE_INOTIFY 0
105# endif 317# endif
106#endif 318#endif
107 319
320#ifndef EV_PID_HASHSIZE
321# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
322#endif
323
324#ifndef EV_INOTIFY_HASHSIZE
325# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
326#endif
327
108#ifndef EV_USE_REALTIME 328#ifndef EV_USE_EVENTFD
109# define EV_USE_REALTIME 1 329# 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
110#endif 333# endif
334#endif
111 335
112/**/ 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 */
380# undef EV_USE_POLL
381# define EV_USE_POLL 0
382#endif
113 383
114#ifndef CLOCK_MONOTONIC 384#ifndef CLOCK_MONOTONIC
115# undef EV_USE_MONOTONIC 385# undef EV_USE_MONOTONIC
116# define EV_USE_MONOTONIC 0 386# define EV_USE_MONOTONIC 0
117#endif 387#endif
… …
119#ifndef CLOCK_REALTIME 389#ifndef CLOCK_REALTIME
120# undef EV_USE_REALTIME 390# undef EV_USE_REALTIME
121# define EV_USE_REALTIME 0 391# define EV_USE_REALTIME 0
122#endif 392#endif
123 393
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 */
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};
452#endif
453
124/**/ 454/**/
125 455
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
126#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) */
127#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) */
128#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
129/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
130 471
131#include "ev.h" 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)
132 474
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
506#ifndef ECB_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;
133#if __GNUC__ >= 3 519 #if __GNUC__
134# define expect(expr,value) __builtin_expect ((expr),(value)) 520 typedef signed long long int64_t;
135# define inline inline 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;
136#else 536#else
137# define expect(expr,value) (expr) 537 #include <inttypes.h>
138# define inline static 538 #if UINTMAX_MAX > 0xffffffffU
539 #define ECB_PTRSIZE 8
540 #else
541 #define ECB_PTRSIZE 4
139#endif 542 #endif
543#endif
140 544
141#define expect_false(expr) expect ((expr) != 0, 0) 545/* many compilers define _GNUC_ to some versions but then only implement
142#define expect_true(expr) expect ((expr) != 0, 1) 546 * what their idiot authors think are the "more important" extensions,
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
143 559
144#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 560#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
145#define ABSPRI(w) ((w)->priority - EV_MINPRI) 561#define ECB_C99 (__STDC_VERSION__ >= 199901L)
146 562#define ECB_C11 (__STDC_VERSION__ >= 201112L)
147typedef struct ev_watcher *W; 563#define ECB_CPP (__cplusplus+0)
148typedef struct ev_watcher_list *WL; 564#define ECB_CPP11 (__cplusplus >= 201103L)
149typedef struct ev_watcher_time *WT;
150
151static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
152
153#include "ev_win32.c"
154 565
155/*****************************************************************************/ 566/*****************************************************************************/
156 567
568/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
569/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
570
571#if ECB_NO_THREADS
572 #define ECB_NO_SMP 1
573#endif
574
575#if ECB_NO_SMP
576 #define ECB_MEMORY_FENCE do { } while (0)
577#endif
578
579#ifndef ECB_MEMORY_FENCE
580 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
581 #if __i386 || __i386__
582 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
583 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
584 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
585 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
586 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
587 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
588 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
589 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
590 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
591 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
592 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
593 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
594 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
595 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
596 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
597 #elif __sparc || __sparc__
598 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
599 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
600 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
601 #elif defined __s390__ || defined __s390x__
602 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
603 #elif defined __mips__
604 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
605 #elif defined __alpha__
606 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
607 #elif defined __hppa__
608 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
609 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
610 #elif defined __ia64__
611 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
612 #endif
613 #endif
614#endif
615
616#ifndef ECB_MEMORY_FENCE
617 #if ECB_GCC_VERSION(4,7)
618 /* see comment below (stdatomic.h) about the C11 memory model. */
619 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
620 #elif defined __clang && __has_feature (cxx_atomic)
621 /* see comment below (stdatomic.h) about the C11 memory model. */
622 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
623 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
624 #define ECB_MEMORY_FENCE __sync_synchronize ()
625 #elif _MSC_VER >= 1400 /* VC++ 2005 */
626 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
627 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
628 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
629 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
630 #elif defined _WIN32
631 #include <WinNT.h>
632 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
633 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
634 #include <mbarrier.h>
635 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
636 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
637 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
638 #elif __xlC__
639 #define ECB_MEMORY_FENCE __sync ()
640 #endif
641#endif
642
643#ifndef ECB_MEMORY_FENCE
644 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
645 /* we assume that these memory fences work on all variables/all memory accesses, */
646 /* not just C11 atomics and atomic accesses */
647 #include <stdatomic.h>
648 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
649 /* any fence other than seq_cst, which isn't very efficient for us. */
650 /* Why that is, we don't know - either the C11 memory model is quite useless */
651 /* for most usages, or gcc and clang have a bug */
652 /* I *currently* lean towards the latter, and inefficiently implement */
653 /* all three of ecb's fences as a seq_cst fence */
654 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
655 #endif
656#endif
657
658#ifndef ECB_MEMORY_FENCE
659 #if !ECB_AVOID_PTHREADS
660 /*
661 * if you get undefined symbol references to pthread_mutex_lock,
662 * or failure to find pthread.h, then you should implement
663 * the ECB_MEMORY_FENCE operations for your cpu/compiler
664 * OR provide pthread.h and link against the posix thread library
665 * of your system.
666 */
667 #include <pthread.h>
668 #define ECB_NEEDS_PTHREADS 1
669 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
670
671 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
672 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
673 #endif
674#endif
675
676#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
677 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
678#endif
679
680#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
681 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
682#endif
683
684/*****************************************************************************/
685
686#if __cplusplus
687 #define ecb_inline static inline
688#elif ECB_GCC_VERSION(2,5)
689 #define ecb_inline static __inline__
690#elif ECB_C99
691 #define ecb_inline static inline
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
721 #define ecb_expect(expr,value) (expr)
722 #define ecb_prefetch(addr,rw,locality)
723#endif
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. */
756#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
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)
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
1021#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1022
1023#if EV_MINPRI == EV_MAXPRI
1024# define ABSPRI(w) (((W)w), 0)
1025#else
1026# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1027#endif
1028
1029#define EMPTY /* required for microsofts broken pseudo-c compiler */
1030#define EMPTY2(a,b) /* used to suppress some warnings */
1031
1032typedef ev_watcher *W;
1033typedef ev_watcher_list *WL;
1034typedef ev_watcher_time *WT;
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
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
1058
1059#ifdef _WIN32
1060# include "ev_win32.c"
1061#endif
1062
1063/*****************************************************************************/
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
157static void (*syserr_cb)(const char *msg); 1163static void (*syserr_cb)(const char *msg) EV_THROW;
158 1164
1165void ecb_cold
159void ev_set_syserr_cb (void (*cb)(const char *msg)) 1166ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
160{ 1167{
161 syserr_cb = cb; 1168 syserr_cb = cb;
162} 1169}
163 1170
164static void 1171static void noinline ecb_cold
165syserr (const char *msg) 1172ev_syserr (const char *msg)
166{ 1173{
167 if (!msg) 1174 if (!msg)
168 msg = "(libev) system error"; 1175 msg = "(libev) system error";
169 1176
170 if (syserr_cb) 1177 if (syserr_cb)
171 syserr_cb (msg); 1178 syserr_cb (msg);
172 else 1179 else
173 { 1180 {
1181#if EV_AVOID_STDIO
1182 ev_printerr (msg);
1183 ev_printerr (": ");
1184 ev_printerr (strerror (errno));
1185 ev_printerr ("\n");
1186#else
174 perror (msg); 1187 perror (msg);
1188#endif
175 abort (); 1189 abort ();
176 } 1190 }
177} 1191}
178 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
179static void *(*alloc)(void *ptr, long size); 1212static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
180 1213
1214void ecb_cold
181void ev_set_allocator (void *(*cb)(void *ptr, long size)) 1215ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
182{ 1216{
183 alloc = cb; 1217 alloc = cb;
184} 1218}
185 1219
186static void * 1220inline_speed void *
187ev_realloc (void *ptr, long size) 1221ev_realloc (void *ptr, long size)
188{ 1222{
189 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1223 ptr = alloc (ptr, size);
190 1224
191 if (!ptr && size) 1225 if (!ptr && size)
192 { 1226 {
1227#if EV_AVOID_STDIO
1228 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1229#else
193 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1230 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1231#endif
194 abort (); 1232 abort ();
195 } 1233 }
196 1234
197 return ptr; 1235 return ptr;
198} 1236}
… …
200#define ev_malloc(size) ev_realloc (0, (size)) 1238#define ev_malloc(size) ev_realloc (0, (size))
201#define ev_free(ptr) ev_realloc ((ptr), 0) 1239#define ev_free(ptr) ev_realloc ((ptr), 0)
202 1240
203/*****************************************************************************/ 1241/*****************************************************************************/
204 1242
1243/* set in reify when reification needed */
1244#define EV_ANFD_REIFY 1
1245
1246/* file descriptor info structure */
205typedef struct 1247typedef struct
206{ 1248{
207 WL head; 1249 WL head;
208 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 */
209 unsigned char reify; 1253 unsigned char unused;
1254#if EV_USE_EPOLL
1255 unsigned int egen; /* generation counter to counter epoll bugs */
1256#endif
1257#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1258 SOCKET handle;
1259#endif
1260#if EV_USE_IOCP
1261 OVERLAPPED or, ow;
1262#endif
210} ANFD; 1263} ANFD;
211 1264
1265/* stores the pending event set for a given watcher */
212typedef struct 1266typedef struct
213{ 1267{
214 W w; 1268 W w;
215 int events; 1269 int events; /* the pending event set for the given watcher */
216} ANPENDING; 1270} ANPENDING;
217 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
1299
218#if EV_MULTIPLICITY 1300#if EV_MULTIPLICITY
219 1301
220struct ev_loop 1302 struct ev_loop
221{ 1303 {
1304 ev_tstamp ev_rt_now;
1305 #define ev_rt_now ((loop)->ev_rt_now)
222# define VAR(name,decl) decl; 1306 #define VAR(name,decl) decl;
223# include "ev_vars.h" 1307 #include "ev_vars.h"
224};
225# undef VAR 1308 #undef VAR
1309 };
226# include "ev_wrap.h" 1310 #include "ev_wrap.h"
1311
1312 static struct ev_loop default_loop_struct;
1313 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
227 1314
228#else 1315#else
229 1316
1317 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
230# define VAR(name,decl) static decl; 1318 #define VAR(name,decl) static decl;
231# include "ev_vars.h" 1319 #include "ev_vars.h"
232# undef VAR 1320 #undef VAR
233 1321
1322 static int ev_default_loop_ptr;
1323
234#endif 1324#endif
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
235 1337
236/*****************************************************************************/ 1338/*****************************************************************************/
237 1339
238inline ev_tstamp 1340#ifndef EV_HAVE_EV_TIME
1341ev_tstamp
239ev_time (void) 1342ev_time (void) EV_THROW
240{ 1343{
241#if EV_USE_REALTIME 1344#if EV_USE_REALTIME
1345 if (expect_true (have_realtime))
1346 {
242 struct timespec ts; 1347 struct timespec ts;
243 clock_gettime (CLOCK_REALTIME, &ts); 1348 clock_gettime (CLOCK_REALTIME, &ts);
244 return ts.tv_sec + ts.tv_nsec * 1e-9; 1349 return ts.tv_sec + ts.tv_nsec * 1e-9;
245#else 1350 }
1351#endif
1352
246 struct timeval tv; 1353 struct timeval tv;
247 gettimeofday (&tv, 0); 1354 gettimeofday (&tv, 0);
248 return tv.tv_sec + tv.tv_usec * 1e-6; 1355 return tv.tv_sec + tv.tv_usec * 1e-6;
249#endif
250} 1356}
1357#endif
251 1358
252inline ev_tstamp 1359inline_size ev_tstamp
253get_clock (void) 1360get_clock (void)
254{ 1361{
255#if EV_USE_MONOTONIC 1362#if EV_USE_MONOTONIC
256 if (expect_true (have_monotonic)) 1363 if (expect_true (have_monotonic))
257 { 1364 {
… …
262#endif 1369#endif
263 1370
264 return ev_time (); 1371 return ev_time ();
265} 1372}
266 1373
1374#if EV_MULTIPLICITY
267ev_tstamp 1375ev_tstamp
268ev_now (EV_P) 1376ev_now (EV_P) EV_THROW
269{ 1377{
270 return rt_now; 1378 return ev_rt_now;
271} 1379}
1380#endif
272 1381
273#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))
274 1442
275#define array_needsize(type,base,cur,cnt,init) \ 1443#define array_needsize(type,base,cur,cnt,init) \
276 if (expect_false ((cnt) > cur)) \ 1444 if (expect_false ((cnt) > (cur))) \
277 { \ 1445 { \
278 int newcnt = cur; \ 1446 int ecb_unused ocur_ = (cur); \
279 do \ 1447 (base) = (type *)array_realloc \
280 { \ 1448 (sizeof (type), (base), &(cur), (cnt)); \
281 newcnt = array_roundsize (type, newcnt << 1); \ 1449 init ((base) + (ocur_), (cur) - ocur_); \
282 } \
283 while ((cnt) > newcnt); \
284 \
285 base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
286 init (base + cur, newcnt - cur); \
287 cur = newcnt; \
288 } 1450 }
289 1451
1452#if 0
290#define array_slim(type,stem) \ 1453#define array_slim(type,stem) \
291 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 1454 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
292 { \ 1455 { \
293 stem ## max = array_roundsize (stem ## cnt >> 1); \ 1456 stem ## max = array_roundsize (stem ## cnt >> 1); \
294 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\ 1457 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
295 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1458 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
296 } 1459 }
297 1460#endif
298/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
299/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
300#define array_free_microshit(stem) \
301 ev_free (stem ## s); stem ## cnt = stem ## max = 0;
302 1461
303#define array_free(stem, idx) \ 1462#define array_free(stem, idx) \
304 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
305 1464
306/*****************************************************************************/ 1465/*****************************************************************************/
307 1466
308static void 1467/* dummy callback for pending events */
309anfds_init (ANFD *base, int count) 1468static void noinline
1469pendingcb (EV_P_ ev_prepare *w, int revents)
310{ 1470{
311 while (count--)
312 {
313 base->head = 0;
314 base->events = EV_NONE;
315 base->reify = 0;
316
317 ++base;
318 }
319} 1471}
320 1472
321void 1473void noinline
322ev_feed_event (EV_P_ void *w, int revents) 1474ev_feed_event (EV_P_ void *w, int revents) EV_THROW
323{ 1475{
324 W w_ = (W)w; 1476 W w_ = (W)w;
1477 int pri = ABSPRI (w_);
325 1478
326 if (w_->pending) 1479 if (expect_false (w_->pending))
1480 pendings [pri][w_->pending - 1].events |= revents;
1481 else
327 { 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_;
328 pendings [ABSPRI (w_)][w_->pending - 1].events |= revents; 1486 pendings [pri][w_->pending - 1].events = revents;
329 return;
330 } 1487 }
331 1488
332 w_->pending = ++pendingcnt [ABSPRI (w_)]; 1489 pendingpri = NUMPRI - 1;
333 array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
334 pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
335 pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
336} 1490}
337 1491
338static 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
339queue_events (EV_P_ W *events, int eventcnt, int type) 1508queue_events (EV_P_ W *events, int eventcnt, int type)
340{ 1509{
341 int i; 1510 int i;
342 1511
343 for (i = 0; i < eventcnt; ++i) 1512 for (i = 0; i < eventcnt; ++i)
344 ev_feed_event (EV_A_ events [i], type); 1513 ev_feed_event (EV_A_ events [i], type);
345} 1514}
346 1515
1516/*****************************************************************************/
1517
347inline void 1518inline_speed void
348fd_event (EV_P_ int fd, int revents) 1519fd_event_nocheck (EV_P_ int fd, int revents)
349{ 1520{
350 ANFD *anfd = anfds + fd; 1521 ANFD *anfd = anfds + fd;
351 struct ev_io *w; 1522 ev_io *w;
352 1523
353 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)
354 { 1525 {
355 int ev = w->events & revents; 1526 int ev = w->events & revents;
356 1527
357 if (ev) 1528 if (ev)
358 ev_feed_event (EV_A_ (W)w, ev); 1529 ev_feed_event (EV_A_ (W)w, ev);
359 } 1530 }
360} 1531}
361 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
362void 1544void
363ev_feed_fd_event (EV_P_ int fd, int revents) 1545ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
364{ 1546{
1547 if (fd >= 0 && fd < anfdmax)
365 fd_event (EV_A_ fd, revents); 1548 fd_event_nocheck (EV_A_ fd, revents);
366} 1549}
367 1550
368/*****************************************************************************/ 1551/* make sure the external fd watch events are in-sync */
369 1552/* with the kernel/libev internal state */
370static void 1553inline_size void
371fd_reify (EV_P) 1554fd_reify (EV_P)
372{ 1555{
373 int i; 1556 int i;
374 1557
1558#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
375 for (i = 0; i < fdchangecnt; ++i) 1559 for (i = 0; i < fdchangecnt; ++i)
376 { 1560 {
377 int fd = fdchanges [i]; 1561 int fd = fdchanges [i];
378 ANFD *anfd = anfds + fd; 1562 ANFD *anfd = anfds + fd;
1563
1564 if (anfd->reify & EV__IOFDSET && anfd->head)
1565 {
1566 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1567
1568 if (handle != anfd->handle)
1569 {
1570 unsigned long arg;
1571
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 }
1579 }
1580 }
1581#endif
1582
1583 for (i = 0; i < fdchangecnt; ++i)
1584 {
1585 int fd = fdchanges [i];
1586 ANFD *anfd = anfds + fd;
379 struct ev_io *w; 1587 ev_io *w;
380 1588
381 int events = 0; 1589 unsigned char o_events = anfd->events;
1590 unsigned char o_reify = anfd->reify;
382 1591
383 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
384 events |= w->events;
385
386 anfd->reify = 0; 1592 anfd->reify = 0;
387 1593
388 method_modify (EV_A_ fd, anfd->events, events); 1594 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1595 {
389 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);
390 } 1607 }
391 1608
392 fdchangecnt = 0; 1609 fdchangecnt = 0;
393} 1610}
394 1611
395static void 1612/* something about the given fd changed */
1613inline_size void
396fd_change (EV_P_ int fd) 1614fd_change (EV_P_ int fd, int flags)
397{ 1615{
398 if (anfds [fd].reify) 1616 unsigned char reify = anfds [fd].reify;
399 return;
400
401 anfds [fd].reify = 1; 1617 anfds [fd].reify |= flags;
402 1618
1619 if (expect_true (!reify))
1620 {
403 ++fdchangecnt; 1621 ++fdchangecnt;
404 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void)); 1622 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
405 fdchanges [fdchangecnt - 1] = fd; 1623 fdchanges [fdchangecnt - 1] = fd;
1624 }
406} 1625}
407 1626
408static void 1627/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1628inline_speed void ecb_cold
409fd_kill (EV_P_ int fd) 1629fd_kill (EV_P_ int fd)
410{ 1630{
411 struct ev_io *w; 1631 ev_io *w;
412 1632
413 while ((w = (struct ev_io *)anfds [fd].head)) 1633 while ((w = (ev_io *)anfds [fd].head))
414 { 1634 {
415 ev_io_stop (EV_A_ w); 1635 ev_io_stop (EV_A_ w);
416 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);
417 } 1637 }
418} 1638}
419 1639
420static int 1640/* check whether the given fd is actually valid, for error recovery */
1641inline_size int ecb_cold
421fd_valid (int fd) 1642fd_valid (int fd)
422{ 1643{
423#ifdef WIN32 1644#ifdef _WIN32
424 return !!win32_get_osfhandle (fd); 1645 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
425#else 1646#else
426 return fcntl (fd, F_GETFD) != -1; 1647 return fcntl (fd, F_GETFD) != -1;
427#endif 1648#endif
428} 1649}
429 1650
430/* called on EBADF to verify fds */ 1651/* called on EBADF to verify fds */
431static void 1652static void noinline ecb_cold
432fd_ebadf (EV_P) 1653fd_ebadf (EV_P)
433{ 1654{
434 int fd; 1655 int fd;
435 1656
436 for (fd = 0; fd < anfdmax; ++fd) 1657 for (fd = 0; fd < anfdmax; ++fd)
437 if (anfds [fd].events) 1658 if (anfds [fd].events)
438 if (!fd_valid (fd) == -1 && errno == EBADF) 1659 if (!fd_valid (fd) && errno == EBADF)
439 fd_kill (EV_A_ fd); 1660 fd_kill (EV_A_ fd);
440} 1661}
441 1662
442/* 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 */
443static void 1664static void noinline ecb_cold
444fd_enomem (EV_P) 1665fd_enomem (EV_P)
445{ 1666{
446 int fd; 1667 int fd;
447 1668
448 for (fd = anfdmax; fd--; ) 1669 for (fd = anfdmax; fd--; )
449 if (anfds [fd].events) 1670 if (anfds [fd].events)
450 { 1671 {
451 fd_kill (EV_A_ fd); 1672 fd_kill (EV_A_ fd);
452 return; 1673 break;
453 } 1674 }
454} 1675}
455 1676
456/* 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 */
457static void 1678static void noinline
458fd_rearm_all (EV_P) 1679fd_rearm_all (EV_P)
459{ 1680{
460 int fd; 1681 int fd;
461 1682
462 /* this should be highly optimised to not do anything but set a flag */
463 for (fd = 0; fd < anfdmax; ++fd) 1683 for (fd = 0; fd < anfdmax; ++fd)
464 if (anfds [fd].events) 1684 if (anfds [fd].events)
465 { 1685 {
466 anfds [fd].events = 0; 1686 anfds [fd].events = 0;
467 fd_change (EV_A_ fd); 1687 anfds [fd].emask = 0;
1688 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
468 } 1689 }
469} 1690}
470 1691
1692/* used to prepare libev internal fd's */
1693/* this is not fork-safe */
1694inline_speed void
1695fd_intern (int fd)
1696{
1697#ifdef _WIN32
1698 unsigned long arg = 1;
1699 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1700#else
1701 fcntl (fd, F_SETFD, FD_CLOEXEC);
1702 fcntl (fd, F_SETFL, O_NONBLOCK);
1703#endif
1704}
1705
471/*****************************************************************************/ 1706/*****************************************************************************/
472 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) */
473static void 1951static void
474upheap (WT *heap, int k) 1952pipecb (EV_P_ ev_io *iow, int revents)
475{ 1953{
476 WT w = heap [k]; 1954 int i;
477 1955
478 while (k && heap [k >> 1]->at > w->at) 1956 if (revents & EV_READ)
479 {
480 heap [k] = heap [k >> 1];
481 ((W)heap [k])->active = k + 1;
482 k >>= 1;
483 } 1957 {
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 }
484 1980
485 heap [k] = w; 1981 pipe_write_skipped = 0;
486 ((W)heap [k])->active = k + 1;
487 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
2014}
2015
2016/*****************************************************************************/
2017
2018void
2019ev_feed_signal (int signum) EV_THROW
2020{
2021#if EV_MULTIPLICITY
2022 EV_P = signals [signum - 1].loop;
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);
488} 2033}
489 2034
490static void 2035static void
491downheap (WT *heap, int N, int k)
492{
493 WT w = heap [k];
494
495 while (k < (N >> 1))
496 {
497 int j = k << 1;
498
499 if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
500 ++j;
501
502 if (w->at <= heap [j]->at)
503 break;
504
505 heap [k] = heap [j];
506 ((W)heap [k])->active = k + 1;
507 k = j;
508 }
509
510 heap [k] = w;
511 ((W)heap [k])->active = k + 1;
512}
513
514/*****************************************************************************/
515
516typedef struct
517{
518 WL head;
519 sig_atomic_t volatile gotsig;
520} ANSIG;
521
522static ANSIG *signals;
523static int signalmax;
524
525static int sigpipe [2];
526static sig_atomic_t volatile gotsig;
527static struct ev_io sigev;
528
529static void
530signals_init (ANSIG *base, int count)
531{
532 while (count--)
533 {
534 base->head = 0;
535 base->gotsig = 0;
536
537 ++base;
538 }
539}
540
541static void
542sighandler (int signum) 2036ev_sighandler (int signum)
543{ 2037{
544#if WIN32
545 signal (signum, sighandler);
546#endif
547
548 signals [signum - 1].gotsig = 1;
549
550 if (!gotsig)
551 {
552 int old_errno = errno;
553 gotsig = 1;
554#ifdef WIN32 2038#ifdef _WIN32
555 send (sigpipe [1], &signum, 1, MSG_DONTWAIT); 2039 signal (signum, ev_sighandler);
556#else
557 write (sigpipe [1], &signum, 1);
558#endif 2040#endif
559 errno = old_errno;
560 }
561}
562 2041
563void 2042 ev_feed_signal (signum);
2043}
2044
2045void noinline
564ev_feed_signal_event (EV_P_ int signum) 2046ev_feed_signal_event (EV_P_ int signum) EV_THROW
565{ 2047{
2048 WL w;
2049
2050 if (expect_false (signum <= 0 || signum > EV_NSIG))
2051 return;
2052
2053 --signum;
2054
566#if EV_MULTIPLICITY 2055#if EV_MULTIPLICITY
567 assert (("feeding signal events is only supported in the default loop", loop == default_loop)); 2056 /* it is permissible to try to feed a signal to the wrong loop */
568#endif 2057 /* or, likely more useful, feeding a signal nobody is waiting for */
569 2058
570 --signum; 2059 if (expect_false (signals [signum].loop != EV_A))
571
572 if (signum < 0 || signum >= signalmax)
573 return; 2060 return;
2061#endif
574 2062
575 signals [signum].gotsig = 0; 2063 signals [signum].pending = 0;
2064 ECB_MEMORY_FENCE_RELEASE;
576 2065
577 for (w = signals [signum].head; w; w = w->next) 2066 for (w = signals [signum].head; w; w = w->next)
578 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2067 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
579} 2068}
580 2069
2070#if EV_USE_SIGNALFD
581static void 2071static void
582sigcb (EV_P_ struct ev_io *iow, int revents) 2072sigfdcb (EV_P_ ev_io *iow, int revents)
583{ 2073{
584 WL w; 2074 struct signalfd_siginfo si[2], *sip; /* these structs are big */
585 int signum;
586 2075
587#ifdef WIN32 2076 for (;;)
588 recv (sigpipe [0], &revents, 1, MSG_DONTWAIT); 2077 {
589#else 2078 ssize_t res = read (sigfd, si, sizeof (si));
590 read (sigpipe [0], &revents, 1);
591#endif
592 gotsig = 0;
593 2079
594 for (signum = signalmax; signum--; ) 2080 /* not ISO-C, as res might be -1, but works with SuS */
595 if (signals [signum].gotsig) 2081 for (sip = si; (char *)sip < (char *)si + res; ++sip)
596 sigevent (EV_A_ signum + 1); 2082 ev_feed_signal_event (EV_A_ sip->ssi_signo);
597}
598 2083
599static void 2084 if (res < (ssize_t)sizeof (si))
600siginit (EV_P) 2085 break;
601{ 2086 }
602#ifndef WIN32
603 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
604 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
605
606 /* rather than sort out wether we really need nb, set it */
607 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
608 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
609#endif
610
611 ev_io_set (&sigev, sigpipe [0], EV_READ);
612 ev_io_start (EV_A_ &sigev);
613 ev_unref (EV_A); /* child watcher should not keep loop alive */
614} 2087}
2088#endif
2089
2090#endif
615 2091
616/*****************************************************************************/ 2092/*****************************************************************************/
617 2093
618static struct ev_child *childs [PID_HASHSIZE]; 2094#if EV_CHILD_ENABLE
2095static WL childs [EV_PID_HASHSIZE];
619 2096
620#ifndef WIN32
621
622static 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}
623 2122
624#ifndef WCONTINUED 2123#ifndef WCONTINUED
625# define WCONTINUED 0 2124# define WCONTINUED 0
626#endif 2125#endif
627 2126
2127/* called on sigchld etc., calls waitpid */
628static void 2128static void
629child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
630{
631 struct ev_child *w;
632
633 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
634 if (w->pid == pid || !w->pid)
635 {
636 ev_priority (w) = ev_priority (sw); /* need to do it *now* */
637 w->rpid = pid;
638 w->rstatus = status;
639 ev_feed_event (EV_A_ (W)w, EV_CHILD);
640 }
641}
642
643static void
644childcb (EV_P_ struct ev_signal *sw, int revents) 2129childcb (EV_P_ ev_signal *sw, int revents)
645{ 2130{
646 int pid, status; 2131 int pid, status;
647 2132
2133 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
648 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 2134 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
649 { 2135 if (!WCONTINUED
2136 || errno != EINVAL
2137 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
2138 return;
2139
650 /* 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 */
651 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2142 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
652 2143
653 child_reap (EV_A_ sw, pid, pid, status); 2144 child_reap (EV_A_ pid, pid, status);
2145 if ((EV_PID_HASHSIZE) > 1)
654 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 */
655 }
656} 2147}
657 2148
658#endif 2149#endif
659 2150
660/*****************************************************************************/ 2151/*****************************************************************************/
661 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
662#if EV_USE_KQUEUE 2159#if EV_USE_KQUEUE
663# include "ev_kqueue.c" 2160# include "ev_kqueue.c"
664#endif 2161#endif
665#if EV_USE_EPOLL 2162#if EV_USE_EPOLL
666# include "ev_epoll.c" 2163# include "ev_epoll.c"
… …
670#endif 2167#endif
671#if EV_USE_SELECT 2168#if EV_USE_SELECT
672# include "ev_select.c" 2169# include "ev_select.c"
673#endif 2170#endif
674 2171
675int 2172int ecb_cold
676ev_version_major (void) 2173ev_version_major (void) EV_THROW
677{ 2174{
678 return EV_VERSION_MAJOR; 2175 return EV_VERSION_MAJOR;
679} 2176}
680 2177
681int 2178int ecb_cold
682ev_version_minor (void) 2179ev_version_minor (void) EV_THROW
683{ 2180{
684 return EV_VERSION_MINOR; 2181 return EV_VERSION_MINOR;
685} 2182}
686 2183
687/* 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 */
688static int 2185int inline_size ecb_cold
689enable_secure (void) 2186enable_secure (void)
690{ 2187{
691#ifdef WIN32 2188#ifdef _WIN32
692 return 0; 2189 return 0;
693#else 2190#else
694 return getuid () != geteuid () 2191 return getuid () != geteuid ()
695 || getgid () != getegid (); 2192 || getgid () != getegid ();
696#endif 2193#endif
697} 2194}
698 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
2244unsigned int
2245ev_backend (EV_P) EV_THROW
2246{
2247 return backend;
2248}
2249
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
2303loop_init (EV_P_ unsigned int flags) EV_THROW
2304{
2305 if (!backend)
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
2319#if EV_USE_MONOTONIC
2320 if (!have_monotonic)
2321 {
2322 struct timespec ts;
2323
2324 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
2325 have_monotonic = 1;
2326 }
2327#endif
2328
2329 /* pid check not overridable via env */
2330#ifndef _WIN32
2331 if (flags & EVFLAG_FORKCHECK)
2332 curpid = getpid ();
2333#endif
2334
2335 if (!(flags & EVFLAG_NOENV)
2336 && !enable_secure ()
2337 && getenv ("LIBEV_FLAGS"))
2338 flags = atoi (getenv ("LIBEV_FLAGS"));
2339
2340 ev_rt_now = ev_time ();
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
2347
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
2374#if EV_USE_KQUEUE
2375 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
2376#endif
2377#if EV_USE_EPOLL
2378 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
2379#endif
2380#if EV_USE_POLL
2381 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
2382#endif
2383#if EV_USE_SELECT
2384 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
2385#endif
2386
2387 ev_prepare_init (&pending_w, pendingcb);
2388
2389#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2390 ev_init (&pipe_w, pipecb);
2391 ev_set_priority (&pipe_w, EV_MAXPRI);
2392#endif
2393 }
2394}
2395
2396/* free up a loop structure */
2397void ecb_cold
2398ev_loop_destroy (EV_P)
2399{
2400 int i;
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
2461#if EV_USE_KQUEUE
2462 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
2463#endif
2464#if EV_USE_EPOLL
2465 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
2466#endif
2467#if EV_USE_POLL
2468 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
2469#endif
2470#if EV_USE_SELECT
2471 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
2472#endif
2473
2474 for (i = NUMPRI; i--; )
2475 {
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;
2483
2484 /* have to use the microsoft-never-gets-it-right macro */
2485 array_free (rfeed, EMPTY);
2486 array_free (fdchange, EMPTY);
2487 array_free (timer, EMPTY);
2488#if EV_PERIODIC_ENABLE
2489 array_free (periodic, EMPTY);
2490#endif
2491#if EV_FORK_ENABLE
2492 array_free (fork, EMPTY);
2493#endif
2494#if EV_CLEANUP_ENABLE
2495 array_free (cleanup, EMPTY);
2496#endif
2497 array_free (prepare, EMPTY);
2498 array_free (check, EMPTY);
2499#if EV_ASYNC_ENABLE
2500 array_free (async, EMPTY);
2501#endif
2502
2503 backend = 0;
2504
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
2520loop_fork (EV_P)
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
2528#if EV_USE_EPOLL
2529 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
2530#endif
2531#if EV_USE_INOTIFY
2532 infy_fork (EV_A);
2533#endif
2534
2535 if (ev_is_active (&pipe_w))
2536 {
2537 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2538
2539 ev_ref (EV_A);
2540 ev_io_stop (EV_A_ &pipe_w);
2541
2542#if EV_USE_EVENTFD
2543 if (evfd >= 0)
2544 close (evfd);
2545#endif
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
2554 evpipe_init (EV_A);
2555 /* iterate over everything, in case we missed something before */
2556 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2557#endif
2558 }
2559
2560 postfork = 0;
2561}
2562
2563#if EV_MULTIPLICITY
2564
2565struct ev_loop * ecb_cold
2566ev_loop_new (unsigned int flags) EV_THROW
2567{
2568 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2569
2570 memset (EV_A, 0, sizeof (struct ev_loop));
2571 loop_init (EV_A_ flags);
2572
2573 if (ev_backend (EV_A))
2574 return EV_A;
2575
2576 ev_free (EV_A);
2577 return 0;
2578}
2579
2580#endif /* multiplicity */
2581
2582#if EV_VERIFY
2583static void noinline ecb_cold
2584verify_watcher (EV_P_ W w)
2585{
2586 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
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}
2703#endif
2704
2705#if EV_MULTIPLICITY
2706struct ev_loop * ecb_cold
2707#else
699int 2708int
700ev_method (EV_P) 2709#endif
2710ev_default_loop (unsigned int flags) EV_THROW
701{ 2711{
702 return method; 2712 if (!ev_default_loop_ptr)
703}
704
705static void
706loop_init (EV_P_ int methods)
707{
708 if (!method)
709 {
710#if EV_USE_MONOTONIC
711 { 2713 {
712 struct timespec ts;
713 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
714 have_monotonic = 1;
715 }
716#endif
717
718 rt_now = ev_time ();
719 mn_now = get_clock ();
720 now_floor = mn_now;
721 rtmn_diff = rt_now - mn_now;
722
723 if (methods == EVMETHOD_AUTO)
724 if (!enable_secure () && getenv ("LIBEV_METHODS"))
725 methods = atoi (getenv ("LIBEV_METHODS"));
726 else
727 methods = EVMETHOD_ANY;
728
729 method = 0;
730#if EV_USE_WIN32
731 if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
732#endif
733#if EV_USE_KQUEUE
734 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
735#endif
736#if EV_USE_EPOLL
737 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
738#endif
739#if EV_USE_POLL
740 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
741#endif
742#if EV_USE_SELECT
743 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
744#endif
745
746 ev_watcher_init (&sigev, sigcb);
747 ev_set_priority (&sigev, EV_MAXPRI);
748 }
749}
750
751void
752loop_destroy (EV_P)
753{
754 int i;
755
756#if EV_USE_WIN32
757 if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
758#endif
759#if EV_USE_KQUEUE
760 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
761#endif
762#if EV_USE_EPOLL
763 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
764#endif
765#if EV_USE_POLL
766 if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
767#endif
768#if EV_USE_SELECT
769 if (method == EVMETHOD_SELECT) select_destroy (EV_A);
770#endif
771
772 for (i = NUMPRI; i--; )
773 array_free (pending, [i]);
774
775 /* have to use the microsoft-never-gets-it-right macro */
776 array_free_microshit (fdchange);
777 array_free_microshit (timer);
778 array_free_microshit (periodic);
779 array_free_microshit (idle);
780 array_free_microshit (prepare);
781 array_free_microshit (check);
782
783 method = 0;
784}
785
786static void
787loop_fork (EV_P)
788{
789#if EV_USE_EPOLL
790 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
791#endif
792#if EV_USE_KQUEUE
793 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
794#endif
795
796 if (ev_is_active (&sigev))
797 {
798 /* default loop */
799
800 ev_ref (EV_A);
801 ev_io_stop (EV_A_ &sigev);
802 close (sigpipe [0]);
803 close (sigpipe [1]);
804
805 while (pipe (sigpipe))
806 syserr ("(libev) error creating pipe");
807
808 siginit (EV_A);
809 }
810
811 postfork = 0;
812}
813
814#if EV_MULTIPLICITY 2714#if EV_MULTIPLICITY
815struct ev_loop * 2715 EV_P = ev_default_loop_ptr = &default_loop_struct;
816ev_loop_new (int methods)
817{
818 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
819
820 memset (loop, 0, sizeof (struct ev_loop));
821
822 loop_init (EV_A_ methods);
823
824 if (ev_method (EV_A))
825 return loop;
826
827 return 0;
828}
829
830void
831ev_loop_destroy (EV_P)
832{
833 loop_destroy (EV_A);
834 ev_free (loop);
835}
836
837void
838ev_loop_fork (EV_P)
839{
840 postfork = 1;
841}
842
843#endif
844
845#if EV_MULTIPLICITY
846struct ev_loop default_loop_struct;
847static struct ev_loop *default_loop;
848
849struct ev_loop *
850#else 2716#else
851static int default_loop;
852
853int
854#endif
855ev_default_loop (int methods)
856{
857 if (sigpipe [0] == sigpipe [1])
858 if (pipe (sigpipe))
859 return 0;
860
861 if (!default_loop)
862 {
863#if EV_MULTIPLICITY
864 struct ev_loop *loop = default_loop = &default_loop_struct;
865#else
866 default_loop = 1; 2717 ev_default_loop_ptr = 1;
867#endif 2718#endif
868 2719
869 loop_init (EV_A_ methods); 2720 loop_init (EV_A_ flags);
870 2721
871 if (ev_method (EV_A)) 2722 if (ev_backend (EV_A))
872 { 2723 {
873 siginit (EV_A); 2724#if EV_CHILD_ENABLE
874
875#ifndef WIN32
876 ev_signal_init (&childev, childcb, SIGCHLD); 2725 ev_signal_init (&childev, childcb, SIGCHLD);
877 ev_set_priority (&childev, EV_MAXPRI); 2726 ev_set_priority (&childev, EV_MAXPRI);
878 ev_signal_start (EV_A_ &childev); 2727 ev_signal_start (EV_A_ &childev);
879 ev_unref (EV_A); /* child watcher should not keep loop alive */ 2728 ev_unref (EV_A); /* child watcher should not keep loop alive */
880#endif 2729#endif
881 } 2730 }
882 else 2731 else
883 default_loop = 0; 2732 ev_default_loop_ptr = 0;
884 } 2733 }
885 2734
886 return default_loop; 2735 return ev_default_loop_ptr;
887} 2736}
888 2737
889void 2738void
890ev_default_destroy (void) 2739ev_loop_fork (EV_P) EV_THROW
891{ 2740{
892#if EV_MULTIPLICITY 2741 postfork = 1;
893 struct ev_loop *loop = default_loop;
894#endif
895
896#ifndef WIN32
897 ev_ref (EV_A); /* child watcher */
898 ev_signal_stop (EV_A_ &childev);
899#endif
900
901 ev_ref (EV_A); /* signal watcher */
902 ev_io_stop (EV_A_ &sigev);
903
904 close (sigpipe [0]); sigpipe [0] = 0;
905 close (sigpipe [1]); sigpipe [1] = 0;
906
907 loop_destroy (EV_A);
908} 2742}
2743
2744/*****************************************************************************/
909 2745
910void 2746void
911ev_default_fork (void) 2747ev_invoke (EV_P_ void *w, int revents)
912{ 2748{
913#if EV_MULTIPLICITY 2749 EV_CB_INVOKE ((W)w, revents);
914 struct ev_loop *loop = default_loop;
915#endif
916
917 if (method)
918 postfork = 1;
919} 2750}
920 2751
921/*****************************************************************************/ 2752unsigned int
922 2753ev_pending_count (EV_P) EV_THROW
923static int
924any_pending (EV_P)
925{ 2754{
926 int pri; 2755 int pri;
2756 unsigned int count = 0;
927 2757
928 for (pri = NUMPRI; pri--; ) 2758 for (pri = NUMPRI; pri--; )
929 if (pendingcnt [pri]) 2759 count += pendingcnt [pri];
930 return 1;
931 2760
932 return 0; 2761 return count;
933} 2762}
934 2763
935static void 2764void noinline
936call_pending (EV_P) 2765ev_invoke_pending (EV_P)
937{ 2766{
938 int pri; 2767 pendingpri = NUMPRI;
939 2768
940 for (pri = NUMPRI; pri--; ) 2769 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
2770 {
2771 --pendingpri;
2772
941 while (pendingcnt [pri]) 2773 while (pendingcnt [pendingpri])
942 {
943 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
944
945 if (p->w)
946 { 2774 {
2775 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2776
947 p->w->pending = 0; 2777 p->w->pending = 0;
948 p->w->cb (EV_A_ p->w, p->events); 2778 EV_CB_INVOKE (p->w, p->events);
2779 EV_FREQUENT_CHECK;
2780 }
2781 }
2782}
2783
2784#if EV_IDLE_ENABLE
2785/* make idle watchers pending. this handles the "call-idle */
2786/* only when higher priorities are idle" logic */
2787inline_size void
2788idle_reify (EV_P)
2789{
2790 if (expect_false (idleall))
2791 {
2792 int pri;
2793
2794 for (pri = NUMPRI; pri--; )
2795 {
2796 if (pendingcnt [pri])
2797 break;
2798
2799 if (idlecnt [pri])
2800 {
2801 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2802 break;
949 } 2803 }
950 } 2804 }
2805 }
951} 2806}
2807#endif
952 2808
953static void 2809/* make timers pending */
2810inline_size void
954timers_reify (EV_P) 2811timers_reify (EV_P)
955{ 2812{
2813 EV_FREQUENT_CHECK;
2814
956 while (timercnt && ((WT)timers [0])->at <= mn_now) 2815 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
957 { 2816 {
958 struct ev_timer *w = timers [0]; 2817 do
959
960 assert (("inactive timer on timer heap detected", ev_is_active (w)));
961
962 /* first reschedule or stop timer */
963 if (w->repeat)
964 { 2818 {
2819 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2820
2821 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2822
2823 /* first reschedule or stop timer */
2824 if (w->repeat)
2825 {
2826 ev_at (w) += w->repeat;
2827 if (ev_at (w) < mn_now)
2828 ev_at (w) = mn_now;
2829
965 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 2830 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
966 ((WT)w)->at = mn_now + w->repeat; 2831
2832 ANHE_at_cache (timers [HEAP0]);
967 downheap ((WT *)timers, timercnt, 0); 2833 downheap (timers, timercnt, HEAP0);
2834 }
2835 else
2836 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2837
2838 EV_FREQUENT_CHECK;
2839 feed_reverse (EV_A_ (W)w);
968 } 2840 }
969 else 2841 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
970 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
971 2842
972 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT); 2843 feed_reverse_done (EV_A_ EV_TIMER);
2844 }
2845}
2846
2847#if EV_PERIODIC_ENABLE
2848
2849static void noinline
2850periodic_recalc (EV_P_ ev_periodic *w)
2851{
2852 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2853 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2854
2855 /* the above almost always errs on the low side */
2856 while (at <= ev_rt_now)
973 } 2857 {
974} 2858 ev_tstamp nat = at + w->interval;
975 2859
976static void 2860 /* when resolution fails us, we use ev_rt_now */
2861 if (expect_false (nat == at))
2862 {
2863 at = ev_rt_now;
2864 break;
2865 }
2866
2867 at = nat;
2868 }
2869
2870 ev_at (w) = at;
2871}
2872
2873/* make periodics pending */
2874inline_size void
977periodics_reify (EV_P) 2875periodics_reify (EV_P)
978{ 2876{
2877 EV_FREQUENT_CHECK;
2878
979 while (periodiccnt && ((WT)periodics [0])->at <= rt_now) 2879 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
980 { 2880 {
981 struct ev_periodic *w = periodics [0]; 2881 do
2882 {
2883 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
982 2884
983 assert (("inactive timer on periodic heap detected", ev_is_active (w))); 2885 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
984 2886
985 /* first reschedule or stop timer */ 2887 /* first reschedule or stop timer */
2888 if (w->reschedule_cb)
2889 {
2890 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2891
2892 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2893
2894 ANHE_at_cache (periodics [HEAP0]);
2895 downheap (periodics, periodiccnt, HEAP0);
2896 }
2897 else if (w->interval)
2898 {
2899 periodic_recalc (EV_A_ w);
2900 ANHE_at_cache (periodics [HEAP0]);
2901 downheap (periodics, periodiccnt, HEAP0);
2902 }
2903 else
2904 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2905
2906 EV_FREQUENT_CHECK;
2907 feed_reverse (EV_A_ (W)w);
2908 }
2909 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2910
2911 feed_reverse_done (EV_A_ EV_PERIODIC);
2912 }
2913}
2914
2915/* simply recalculate all periodics */
2916/* TODO: maybe ensure that at least one event happens when jumping forward? */
2917static void noinline ecb_cold
2918periodics_reschedule (EV_P)
2919{
2920 int i;
2921
2922 /* adjust periodics after time jump */
2923 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2924 {
2925 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2926
986 if (w->reschedule_cb) 2927 if (w->reschedule_cb)
987 {
988 ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001); 2928 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
989
990 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
991 downheap ((WT *)periodics, periodiccnt, 0);
992 }
993 else if (w->interval) 2929 else if (w->interval)
994 { 2930 periodic_recalc (EV_A_ w);
995 ((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
996 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
997 downheap ((WT *)periodics, periodiccnt, 0);
998 }
999 else
1000 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1001 2931
1002 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 2932 ANHE_at_cache (periodics [i]);
1003 } 2933 }
1004}
1005 2934
1006static void 2935 reheap (periodics, periodiccnt);
1007periodics_reschedule (EV_P) 2936}
2937#endif
2938
2939/* adjust all timers by a given offset */
2940static void noinline ecb_cold
2941timers_reschedule (EV_P_ ev_tstamp adjust)
1008{ 2942{
1009 int i; 2943 int i;
1010 2944
1011 /* adjust periodics after time jump */
1012 for (i = 0; i < periodiccnt; ++i) 2945 for (i = 0; i < timercnt; ++i)
1013 {
1014 struct ev_periodic *w = periodics [i];
1015
1016 if (w->reschedule_cb)
1017 ((WT)w)->at = w->reschedule_cb (w, rt_now);
1018 else if (w->interval)
1019 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
1020 } 2946 {
1021 2947 ANHE *he = timers + i + HEAP0;
1022 /* now rebuild the heap */ 2948 ANHE_w (*he)->at += adjust;
1023 for (i = periodiccnt >> 1; i--; ) 2949 ANHE_at_cache (*he);
1024 downheap ((WT *)periodics, periodiccnt, i);
1025}
1026
1027inline int
1028time_update_monotonic (EV_P)
1029{
1030 mn_now = get_clock ();
1031
1032 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1033 { 2950 }
1034 rt_now = rtmn_diff + mn_now;
1035 return 0;
1036 }
1037 else
1038 {
1039 now_floor = mn_now;
1040 rt_now = ev_time ();
1041 return 1;
1042 }
1043} 2951}
1044 2952
1045static void 2953/* fetch new monotonic and realtime times from the kernel */
1046time_update (EV_P) 2954/* also detect if there was a timejump, and act accordingly */
2955inline_speed void
2956time_update (EV_P_ ev_tstamp max_block)
1047{ 2957{
1048 int i;
1049
1050#if EV_USE_MONOTONIC 2958#if EV_USE_MONOTONIC
1051 if (expect_true (have_monotonic)) 2959 if (expect_true (have_monotonic))
1052 { 2960 {
1053 if (time_update_monotonic (EV_A)) 2961 int i;
2962 ev_tstamp odiff = rtmn_diff;
2963
2964 mn_now = get_clock ();
2965
2966 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2967 /* interpolate in the meantime */
2968 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1054 { 2969 {
1055 ev_tstamp odiff = rtmn_diff; 2970 ev_rt_now = rtmn_diff + mn_now;
2971 return;
2972 }
1056 2973
2974 now_floor = mn_now;
2975 ev_rt_now = ev_time ();
2976
1057 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 2977 /* loop a few times, before making important decisions.
2978 * on the choice of "4": one iteration isn't enough,
2979 * in case we get preempted during the calls to
2980 * ev_time and get_clock. a second call is almost guaranteed
2981 * to succeed in that case, though. and looping a few more times
2982 * doesn't hurt either as we only do this on time-jumps or
2983 * in the unlikely event of having been preempted here.
2984 */
2985 for (i = 4; --i; )
1058 { 2986 {
2987 ev_tstamp diff;
1059 rtmn_diff = rt_now - mn_now; 2988 rtmn_diff = ev_rt_now - mn_now;
1060 2989
1061 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 2990 diff = odiff - rtmn_diff;
2991
2992 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1062 return; /* all is well */ 2993 return; /* all is well */
1063 2994
1064 rt_now = ev_time (); 2995 ev_rt_now = ev_time ();
1065 mn_now = get_clock (); 2996 mn_now = get_clock ();
1066 now_floor = mn_now; 2997 now_floor = mn_now;
1067 } 2998 }
1068 2999
3000 /* no timer adjustment, as the monotonic clock doesn't jump */
3001 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
3002# if EV_PERIODIC_ENABLE
3003 periodics_reschedule (EV_A);
3004# endif
3005 }
3006 else
3007#endif
3008 {
3009 ev_rt_now = ev_time ();
3010
3011 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
3012 {
3013 /* adjust timers. this is easy, as the offset is the same for all of them */
3014 timers_reschedule (EV_A_ ev_rt_now - mn_now);
3015#if EV_PERIODIC_ENABLE
1069 periodics_reschedule (EV_A); 3016 periodics_reschedule (EV_A);
1070 /* no timer adjustment, as the monotonic clock doesn't jump */ 3017#endif
1071 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1072 } 3018 }
1073 }
1074 else
1075#endif
1076 {
1077 rt_now = ev_time ();
1078 3019
1079 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1080 {
1081 periodics_reschedule (EV_A);
1082
1083 /* adjust timers. this is easy, as the offset is the same for all */
1084 for (i = 0; i < timercnt; ++i)
1085 ((WT)timers [i])->at += rt_now - mn_now;
1086 }
1087
1088 mn_now = rt_now; 3020 mn_now = ev_rt_now;
1089 } 3021 }
1090} 3022}
1091 3023
1092void 3024int
1093ev_ref (EV_P)
1094{
1095 ++activecnt;
1096}
1097
1098void
1099ev_unref (EV_P)
1100{
1101 --activecnt;
1102}
1103
1104static int loop_done;
1105
1106void
1107ev_loop (EV_P_ int flags) 3025ev_run (EV_P_ int flags)
1108{ 3026{
1109 double block; 3027#if EV_FEATURE_API
1110 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 3028 ++loop_depth;
3029#endif
3030
3031 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3032
3033 loop_done = EVBREAK_CANCEL;
3034
3035 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1111 3036
1112 do 3037 do
1113 { 3038 {
3039#if EV_VERIFY >= 2
3040 ev_verify (EV_A);
3041#endif
3042
3043#ifndef _WIN32
3044 if (expect_false (curpid)) /* penalise the forking check even more */
3045 if (expect_false (getpid () != curpid))
3046 {
3047 curpid = getpid ();
3048 postfork = 1;
3049 }
3050#endif
3051
3052#if EV_FORK_ENABLE
3053 /* we might have forked, so queue fork handlers */
3054 if (expect_false (postfork))
3055 if (forkcnt)
3056 {
3057 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
3058 EV_INVOKE_PENDING;
3059 }
3060#endif
3061
3062#if EV_PREPARE_ENABLE
1114 /* queue check watchers (and execute them) */ 3063 /* queue prepare watchers (and execute them) */
1115 if (expect_false (preparecnt)) 3064 if (expect_false (preparecnt))
1116 { 3065 {
1117 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3066 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1118 call_pending (EV_A); 3067 EV_INVOKE_PENDING;
1119 } 3068 }
3069#endif
3070
3071 if (expect_false (loop_done))
3072 break;
1120 3073
1121 /* we might have forked, so reify kernel state if necessary */ 3074 /* we might have forked, so reify kernel state if necessary */
1122 if (expect_false (postfork)) 3075 if (expect_false (postfork))
1123 loop_fork (EV_A); 3076 loop_fork (EV_A);
1124 3077
1125 /* update fd-related kernel structures */ 3078 /* update fd-related kernel structures */
1126 fd_reify (EV_A); 3079 fd_reify (EV_A);
1127 3080
1128 /* calculate blocking time */ 3081 /* calculate blocking time */
3082 {
3083 ev_tstamp waittime = 0.;
3084 ev_tstamp sleeptime = 0.;
1129 3085
1130 /* we only need this for !monotonic clock or timers, but as we basically 3086 /* remember old timestamp for io_blocktime calculation */
1131 always have timers, we just calculate it always */ 3087 ev_tstamp prev_mn_now = mn_now;
1132#if EV_USE_MONOTONIC 3088
1133 if (expect_true (have_monotonic)) 3089 /* update time to cancel out callback processing overhead */
1134 time_update_monotonic (EV_A); 3090 time_update (EV_A_ 1e100);
1135 else 3091
1136#endif 3092 /* from now on, we want a pipe-wake-up */
3093 pipe_write_wanted = 1;
3094
3095 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3096
3097 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1137 { 3098 {
1138 rt_now = ev_time ();
1139 mn_now = rt_now;
1140 }
1141
1142 if (flags & EVLOOP_NONBLOCK || idlecnt)
1143 block = 0.;
1144 else
1145 {
1146 block = MAX_BLOCKTIME; 3099 waittime = MAX_BLOCKTIME;
1147 3100
1148 if (timercnt) 3101 if (timercnt)
1149 { 3102 {
1150 ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge; 3103 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1151 if (block > to) block = to; 3104 if (waittime > to) waittime = to;
1152 } 3105 }
1153 3106
3107#if EV_PERIODIC_ENABLE
1154 if (periodiccnt) 3108 if (periodiccnt)
1155 { 3109 {
1156 ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge; 3110 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1157 if (block > to) block = to; 3111 if (waittime > to) waittime = to;
1158 } 3112 }
3113#endif
1159 3114
1160 if (block < 0.) block = 0.; 3115 /* don't let timeouts decrease the waittime below timeout_blocktime */
3116 if (expect_false (waittime < timeout_blocktime))
3117 waittime = timeout_blocktime;
3118
3119 /* at this point, we NEED to wait, so we have to ensure */
3120 /* to pass a minimum nonzero value to the backend */
3121 if (expect_false (waittime < backend_mintime))
3122 waittime = backend_mintime;
3123
3124 /* extra check because io_blocktime is commonly 0 */
3125 if (expect_false (io_blocktime))
3126 {
3127 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3128
3129 if (sleeptime > waittime - backend_mintime)
3130 sleeptime = waittime - backend_mintime;
3131
3132 if (expect_true (sleeptime > 0.))
3133 {
3134 ev_sleep (sleeptime);
3135 waittime -= sleeptime;
3136 }
3137 }
1161 } 3138 }
1162 3139
1163 method_poll (EV_A_ block); 3140#if EV_FEATURE_API
3141 ++loop_count;
3142#endif
3143 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
3144 backend_poll (EV_A_ waittime);
3145 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
1164 3146
3147 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3148
3149 ECB_MEMORY_FENCE_ACQUIRE;
3150 if (pipe_write_skipped)
3151 {
3152 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3153 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3154 }
3155
3156
1165 /* update rt_now, do magic */ 3157 /* update ev_rt_now, do magic */
1166 time_update (EV_A); 3158 time_update (EV_A_ waittime + sleeptime);
3159 }
1167 3160
1168 /* queue pending timers and reschedule them */ 3161 /* queue pending timers and reschedule them */
1169 timers_reify (EV_A); /* relative timers called last */ 3162 timers_reify (EV_A); /* relative timers called last */
3163#if EV_PERIODIC_ENABLE
1170 periodics_reify (EV_A); /* absolute timers called first */ 3164 periodics_reify (EV_A); /* absolute timers called first */
3165#endif
1171 3166
3167#if EV_IDLE_ENABLE
1172 /* queue idle watchers unless io or timers are pending */ 3168 /* queue idle watchers unless other events are pending */
1173 if (idlecnt && !any_pending (EV_A)) 3169 idle_reify (EV_A);
1174 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 3170#endif
1175 3171
3172#if EV_CHECK_ENABLE
1176 /* queue check watchers, to be executed first */ 3173 /* queue check watchers, to be executed first */
1177 if (checkcnt) 3174 if (expect_false (checkcnt))
1178 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3175 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3176#endif
1179 3177
1180 call_pending (EV_A); 3178 EV_INVOKE_PENDING;
1181 } 3179 }
1182 while (activecnt && !loop_done); 3180 while (expect_true (
3181 activecnt
3182 && !loop_done
3183 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3184 ));
1183 3185
1184 if (loop_done != 2) 3186 if (loop_done == EVBREAK_ONE)
1185 loop_done = 0; 3187 loop_done = EVBREAK_CANCEL;
3188
3189#if EV_FEATURE_API
3190 --loop_depth;
3191#endif
3192
3193 return activecnt;
1186} 3194}
1187 3195
1188void 3196void
1189ev_unloop (EV_P_ int how) 3197ev_break (EV_P_ int how) EV_THROW
1190{ 3198{
1191 loop_done = how; 3199 loop_done = how;
1192} 3200}
1193 3201
3202void
3203ev_ref (EV_P) EV_THROW
3204{
3205 ++activecnt;
3206}
3207
3208void
3209ev_unref (EV_P) EV_THROW
3210{
3211 --activecnt;
3212}
3213
3214void
3215ev_now_update (EV_P) EV_THROW
3216{
3217 time_update (EV_A_ 1e100);
3218}
3219
3220void
3221ev_suspend (EV_P) EV_THROW
3222{
3223 ev_now_update (EV_A);
3224}
3225
3226void
3227ev_resume (EV_P) EV_THROW
3228{
3229 ev_tstamp mn_prev = mn_now;
3230
3231 ev_now_update (EV_A);
3232 timers_reschedule (EV_A_ mn_now - mn_prev);
3233#if EV_PERIODIC_ENABLE
3234 /* TODO: really do this? */
3235 periodics_reschedule (EV_A);
3236#endif
3237}
3238
1194/*****************************************************************************/ 3239/*****************************************************************************/
3240/* singly-linked list management, used when the expected list length is short */
1195 3241
1196inline void 3242inline_size void
1197wlist_add (WL *head, WL elem) 3243wlist_add (WL *head, WL elem)
1198{ 3244{
1199 elem->next = *head; 3245 elem->next = *head;
1200 *head = elem; 3246 *head = elem;
1201} 3247}
1202 3248
1203inline void 3249inline_size void
1204wlist_del (WL *head, WL elem) 3250wlist_del (WL *head, WL elem)
1205{ 3251{
1206 while (*head) 3252 while (*head)
1207 { 3253 {
1208 if (*head == elem) 3254 if (expect_true (*head == elem))
1209 { 3255 {
1210 *head = elem->next; 3256 *head = elem->next;
1211 return; 3257 break;
1212 } 3258 }
1213 3259
1214 head = &(*head)->next; 3260 head = &(*head)->next;
1215 } 3261 }
1216} 3262}
1217 3263
3264/* internal, faster, version of ev_clear_pending */
1218inline void 3265inline_speed void
1219ev_clear_pending (EV_P_ W w) 3266clear_pending (EV_P_ W w)
1220{ 3267{
1221 if (w->pending) 3268 if (w->pending)
1222 { 3269 {
1223 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3270 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1224 w->pending = 0; 3271 w->pending = 0;
1225 } 3272 }
1226} 3273}
1227 3274
3275int
3276ev_clear_pending (EV_P_ void *w) EV_THROW
3277{
3278 W w_ = (W)w;
3279 int pending = w_->pending;
3280
3281 if (expect_true (pending))
3282 {
3283 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3284 p->w = (W)&pending_w;
3285 w_->pending = 0;
3286 return p->events;
3287 }
3288 else
3289 return 0;
3290}
3291
1228inline void 3292inline_size void
3293pri_adjust (EV_P_ W w)
3294{
3295 int pri = ev_priority (w);
3296 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3297 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3298 ev_set_priority (w, pri);
3299}
3300
3301inline_speed void
1229ev_start (EV_P_ W w, int active) 3302ev_start (EV_P_ W w, int active)
1230{ 3303{
1231 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 3304 pri_adjust (EV_A_ w);
1232 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1233
1234 w->active = active; 3305 w->active = active;
1235 ev_ref (EV_A); 3306 ev_ref (EV_A);
1236} 3307}
1237 3308
1238inline void 3309inline_size void
1239ev_stop (EV_P_ W w) 3310ev_stop (EV_P_ W w)
1240{ 3311{
1241 ev_unref (EV_A); 3312 ev_unref (EV_A);
1242 w->active = 0; 3313 w->active = 0;
1243} 3314}
1244 3315
1245/*****************************************************************************/ 3316/*****************************************************************************/
1246 3317
1247void 3318void noinline
1248ev_io_start (EV_P_ struct ev_io *w) 3319ev_io_start (EV_P_ ev_io *w) EV_THROW
1249{ 3320{
1250 int fd = w->fd; 3321 int fd = w->fd;
1251 3322
1252 if (ev_is_active (w)) 3323 if (expect_false (ev_is_active (w)))
1253 return; 3324 return;
1254 3325
1255 assert (("ev_io_start called with negative fd", fd >= 0)); 3326 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3327 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3328
3329 EV_FREQUENT_CHECK;
1256 3330
1257 ev_start (EV_A_ (W)w, 1); 3331 ev_start (EV_A_ (W)w, 1);
1258 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3332 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1259 wlist_add ((WL *)&anfds[fd].head, (WL)w); 3333 wlist_add (&anfds[fd].head, (WL)w);
1260 3334
1261 fd_change (EV_A_ fd); 3335 /* common bug, apparently */
1262} 3336 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
1263 3337
1264void 3338 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3339 w->events &= ~EV__IOFDSET;
3340
3341 EV_FREQUENT_CHECK;
3342}
3343
3344void noinline
1265ev_io_stop (EV_P_ struct ev_io *w) 3345ev_io_stop (EV_P_ ev_io *w) EV_THROW
1266{ 3346{
1267 ev_clear_pending (EV_A_ (W)w); 3347 clear_pending (EV_A_ (W)w);
1268 if (!ev_is_active (w)) 3348 if (expect_false (!ev_is_active (w)))
1269 return; 3349 return;
1270 3350
3351 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3352
3353 EV_FREQUENT_CHECK;
3354
1271 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 3355 wlist_del (&anfds[w->fd].head, (WL)w);
1272 ev_stop (EV_A_ (W)w); 3356 ev_stop (EV_A_ (W)w);
1273 3357
1274 fd_change (EV_A_ w->fd); 3358 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1275}
1276 3359
1277void 3360 EV_FREQUENT_CHECK;
3361}
3362
3363void noinline
1278ev_timer_start (EV_P_ struct ev_timer *w) 3364ev_timer_start (EV_P_ ev_timer *w) EV_THROW
1279{ 3365{
1280 if (ev_is_active (w)) 3366 if (expect_false (ev_is_active (w)))
1281 return; 3367 return;
1282 3368
1283 ((WT)w)->at += mn_now; 3369 ev_at (w) += mn_now;
1284 3370
1285 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3371 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1286 3372
3373 EV_FREQUENT_CHECK;
3374
3375 ++timercnt;
1287 ev_start (EV_A_ (W)w, ++timercnt); 3376 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1288 array_needsize (struct ev_timer *, timers, timermax, timercnt, (void)); 3377 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1289 timers [timercnt - 1] = w; 3378 ANHE_w (timers [ev_active (w)]) = (WT)w;
1290 upheap ((WT *)timers, timercnt - 1); 3379 ANHE_at_cache (timers [ev_active (w)]);
3380 upheap (timers, ev_active (w));
1291 3381
3382 EV_FREQUENT_CHECK;
3383
1292 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 3384 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1293} 3385}
1294 3386
1295void 3387void noinline
1296ev_timer_stop (EV_P_ struct ev_timer *w) 3388ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
1297{ 3389{
1298 ev_clear_pending (EV_A_ (W)w); 3390 clear_pending (EV_A_ (W)w);
1299 if (!ev_is_active (w)) 3391 if (expect_false (!ev_is_active (w)))
1300 return; 3392 return;
1301 3393
3394 EV_FREQUENT_CHECK;
3395
3396 {
3397 int active = ev_active (w);
3398
1302 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w)); 3399 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
1303 3400
1304 if (((W)w)->active < timercnt--) 3401 --timercnt;
3402
3403 if (expect_true (active < timercnt + HEAP0))
1305 { 3404 {
1306 timers [((W)w)->active - 1] = timers [timercnt]; 3405 timers [active] = timers [timercnt + HEAP0];
1307 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 3406 adjustheap (timers, timercnt, active);
1308 } 3407 }
3408 }
1309 3409
1310 ((WT)w)->at = w->repeat; 3410 ev_at (w) -= mn_now;
1311 3411
1312 ev_stop (EV_A_ (W)w); 3412 ev_stop (EV_A_ (W)w);
1313}
1314 3413
1315void 3414 EV_FREQUENT_CHECK;
3415}
3416
3417void noinline
1316ev_timer_again (EV_P_ struct ev_timer *w) 3418ev_timer_again (EV_P_ ev_timer *w) EV_THROW
1317{ 3419{
3420 EV_FREQUENT_CHECK;
3421
3422 clear_pending (EV_A_ (W)w);
3423
1318 if (ev_is_active (w)) 3424 if (ev_is_active (w))
1319 { 3425 {
1320 if (w->repeat) 3426 if (w->repeat)
1321 { 3427 {
1322 ((WT)w)->at = mn_now + w->repeat; 3428 ev_at (w) = mn_now + w->repeat;
1323 downheap ((WT *)timers, timercnt, ((W)w)->active - 1); 3429 ANHE_at_cache (timers [ev_active (w)]);
3430 adjustheap (timers, timercnt, ev_active (w));
1324 } 3431 }
1325 else 3432 else
1326 ev_timer_stop (EV_A_ w); 3433 ev_timer_stop (EV_A_ w);
1327 } 3434 }
1328 else if (w->repeat) 3435 else if (w->repeat)
3436 {
3437 ev_at (w) = w->repeat;
1329 ev_timer_start (EV_A_ w); 3438 ev_timer_start (EV_A_ w);
1330} 3439 }
1331 3440
1332void 3441 EV_FREQUENT_CHECK;
3442}
3443
3444ev_tstamp
3445ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3446{
3447 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3448}
3449
3450#if EV_PERIODIC_ENABLE
3451void noinline
1333ev_periodic_start (EV_P_ struct ev_periodic *w) 3452ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
1334{ 3453{
1335 if (ev_is_active (w)) 3454 if (expect_false (ev_is_active (w)))
1336 return; 3455 return;
1337 3456
1338 if (w->reschedule_cb) 3457 if (w->reschedule_cb)
1339 ((WT)w)->at = w->reschedule_cb (w, rt_now); 3458 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1340 else if (w->interval) 3459 else if (w->interval)
1341 { 3460 {
1342 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3461 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1343 /* this formula differs from the one in periodic_reify because we do not always round up */ 3462 periodic_recalc (EV_A_ w);
1344 ((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
1345 } 3463 }
3464 else
3465 ev_at (w) = w->offset;
1346 3466
3467 EV_FREQUENT_CHECK;
3468
3469 ++periodiccnt;
1347 ev_start (EV_A_ (W)w, ++periodiccnt); 3470 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1348 array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void)); 3471 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1349 periodics [periodiccnt - 1] = w; 3472 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1350 upheap ((WT *)periodics, periodiccnt - 1); 3473 ANHE_at_cache (periodics [ev_active (w)]);
3474 upheap (periodics, ev_active (w));
1351 3475
3476 EV_FREQUENT_CHECK;
3477
1352 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 3478 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1353} 3479}
1354 3480
1355void 3481void noinline
1356ev_periodic_stop (EV_P_ struct ev_periodic *w) 3482ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
1357{ 3483{
1358 ev_clear_pending (EV_A_ (W)w); 3484 clear_pending (EV_A_ (W)w);
1359 if (!ev_is_active (w)) 3485 if (expect_false (!ev_is_active (w)))
1360 return; 3486 return;
1361 3487
3488 EV_FREQUENT_CHECK;
3489
3490 {
3491 int active = ev_active (w);
3492
1362 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w)); 3493 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
1363 3494
1364 if (((W)w)->active < periodiccnt--) 3495 --periodiccnt;
3496
3497 if (expect_true (active < periodiccnt + HEAP0))
1365 { 3498 {
1366 periodics [((W)w)->active - 1] = periodics [periodiccnt]; 3499 periodics [active] = periodics [periodiccnt + HEAP0];
1367 downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1); 3500 adjustheap (periodics, periodiccnt, active);
1368 } 3501 }
3502 }
1369 3503
1370 ev_stop (EV_A_ (W)w); 3504 ev_stop (EV_A_ (W)w);
1371}
1372 3505
1373void 3506 EV_FREQUENT_CHECK;
3507}
3508
3509void noinline
1374ev_periodic_again (EV_P_ struct ev_periodic *w) 3510ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
1375{ 3511{
3512 /* TODO: use adjustheap and recalculation */
1376 ev_periodic_stop (EV_A_ w); 3513 ev_periodic_stop (EV_A_ w);
1377 ev_periodic_start (EV_A_ w); 3514 ev_periodic_start (EV_A_ w);
1378} 3515}
1379 3516#endif
1380void
1381ev_idle_start (EV_P_ struct ev_idle *w)
1382{
1383 if (ev_is_active (w))
1384 return;
1385
1386 ev_start (EV_A_ (W)w, ++idlecnt);
1387 array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
1388 idles [idlecnt - 1] = w;
1389}
1390
1391void
1392ev_idle_stop (EV_P_ struct ev_idle *w)
1393{
1394 ev_clear_pending (EV_A_ (W)w);
1395 if (ev_is_active (w))
1396 return;
1397
1398 idles [((W)w)->active - 1] = idles [--idlecnt];
1399 ev_stop (EV_A_ (W)w);
1400}
1401
1402void
1403ev_prepare_start (EV_P_ struct ev_prepare *w)
1404{
1405 if (ev_is_active (w))
1406 return;
1407
1408 ev_start (EV_A_ (W)w, ++preparecnt);
1409 array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
1410 prepares [preparecnt - 1] = w;
1411}
1412
1413void
1414ev_prepare_stop (EV_P_ struct ev_prepare *w)
1415{
1416 ev_clear_pending (EV_A_ (W)w);
1417 if (ev_is_active (w))
1418 return;
1419
1420 prepares [((W)w)->active - 1] = prepares [--preparecnt];
1421 ev_stop (EV_A_ (W)w);
1422}
1423
1424void
1425ev_check_start (EV_P_ struct ev_check *w)
1426{
1427 if (ev_is_active (w))
1428 return;
1429
1430 ev_start (EV_A_ (W)w, ++checkcnt);
1431 array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
1432 checks [checkcnt - 1] = w;
1433}
1434
1435void
1436ev_check_stop (EV_P_ struct ev_check *w)
1437{
1438 ev_clear_pending (EV_A_ (W)w);
1439 if (ev_is_active (w))
1440 return;
1441
1442 checks [((W)w)->active - 1] = checks [--checkcnt];
1443 ev_stop (EV_A_ (W)w);
1444}
1445 3517
1446#ifndef SA_RESTART 3518#ifndef SA_RESTART
1447# define SA_RESTART 0 3519# define SA_RESTART 0
1448#endif 3520#endif
1449 3521
3522#if EV_SIGNAL_ENABLE
3523
3524void noinline
3525ev_signal_start (EV_P_ ev_signal *w) EV_THROW
3526{
3527 if (expect_false (ev_is_active (w)))
3528 return;
3529
3530 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3531
3532#if EV_MULTIPLICITY
3533 assert (("libev: a signal must not be attached to two different loops",
3534 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3535
3536 signals [w->signum - 1].loop = EV_A;
3537#endif
3538
3539 EV_FREQUENT_CHECK;
3540
3541#if EV_USE_SIGNALFD
3542 if (sigfd == -2)
3543 {
3544 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3545 if (sigfd < 0 && errno == EINVAL)
3546 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3547
3548 if (sigfd >= 0)
3549 {
3550 fd_intern (sigfd); /* doing it twice will not hurt */
3551
3552 sigemptyset (&sigfd_set);
3553
3554 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3555 ev_set_priority (&sigfd_w, EV_MAXPRI);
3556 ev_io_start (EV_A_ &sigfd_w);
3557 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3558 }
3559 }
3560
3561 if (sigfd >= 0)
3562 {
3563 /* TODO: check .head */
3564 sigaddset (&sigfd_set, w->signum);
3565 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3566
3567 signalfd (sigfd, &sigfd_set, 0);
3568 }
3569#endif
3570
3571 ev_start (EV_A_ (W)w, 1);
3572 wlist_add (&signals [w->signum - 1].head, (WL)w);
3573
3574 if (!((WL)w)->next)
3575# if EV_USE_SIGNALFD
3576 if (sigfd < 0) /*TODO*/
3577# endif
3578 {
3579# ifdef _WIN32
3580 evpipe_init (EV_A);
3581
3582 signal (w->signum, ev_sighandler);
3583# else
3584 struct sigaction sa;
3585
3586 evpipe_init (EV_A);
3587
3588 sa.sa_handler = ev_sighandler;
3589 sigfillset (&sa.sa_mask);
3590 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3591 sigaction (w->signum, &sa, 0);
3592
3593 if (origflags & EVFLAG_NOSIGMASK)
3594 {
3595 sigemptyset (&sa.sa_mask);
3596 sigaddset (&sa.sa_mask, w->signum);
3597 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3598 }
3599#endif
3600 }
3601
3602 EV_FREQUENT_CHECK;
3603}
3604
3605void noinline
3606ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
3607{
3608 clear_pending (EV_A_ (W)w);
3609 if (expect_false (!ev_is_active (w)))
3610 return;
3611
3612 EV_FREQUENT_CHECK;
3613
3614 wlist_del (&signals [w->signum - 1].head, (WL)w);
3615 ev_stop (EV_A_ (W)w);
3616
3617 if (!signals [w->signum - 1].head)
3618 {
3619#if EV_MULTIPLICITY
3620 signals [w->signum - 1].loop = 0; /* unattach from signal */
3621#endif
3622#if EV_USE_SIGNALFD
3623 if (sigfd >= 0)
3624 {
3625 sigset_t ss;
3626
3627 sigemptyset (&ss);
3628 sigaddset (&ss, w->signum);
3629 sigdelset (&sigfd_set, w->signum);
3630
3631 signalfd (sigfd, &sigfd_set, 0);
3632 sigprocmask (SIG_UNBLOCK, &ss, 0);
3633 }
3634 else
3635#endif
3636 signal (w->signum, SIG_DFL);
3637 }
3638
3639 EV_FREQUENT_CHECK;
3640}
3641
3642#endif
3643
3644#if EV_CHILD_ENABLE
3645
1450void 3646void
1451ev_signal_start (EV_P_ struct ev_signal *w) 3647ev_child_start (EV_P_ ev_child *w) EV_THROW
1452{ 3648{
1453#if EV_MULTIPLICITY 3649#if EV_MULTIPLICITY
1454 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 3650 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1455#endif 3651#endif
1456 if (ev_is_active (w)) 3652 if (expect_false (ev_is_active (w)))
1457 return; 3653 return;
1458 3654
1459 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3655 EV_FREQUENT_CHECK;
1460 3656
1461 ev_start (EV_A_ (W)w, 1); 3657 ev_start (EV_A_ (W)w, 1);
1462 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 3658 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1463 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1464 3659
1465 if (!((WL)w)->next) 3660 EV_FREQUENT_CHECK;
3661}
3662
3663void
3664ev_child_stop (EV_P_ ev_child *w) EV_THROW
3665{
3666 clear_pending (EV_A_ (W)w);
3667 if (expect_false (!ev_is_active (w)))
3668 return;
3669
3670 EV_FREQUENT_CHECK;
3671
3672 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3673 ev_stop (EV_A_ (W)w);
3674
3675 EV_FREQUENT_CHECK;
3676}
3677
3678#endif
3679
3680#if EV_STAT_ENABLE
3681
3682# ifdef _WIN32
3683# undef lstat
3684# define lstat(a,b) _stati64 (a,b)
3685# endif
3686
3687#define DEF_STAT_INTERVAL 5.0074891
3688#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3689#define MIN_STAT_INTERVAL 0.1074891
3690
3691static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3692
3693#if EV_USE_INOTIFY
3694
3695/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3696# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3697
3698static void noinline
3699infy_add (EV_P_ ev_stat *w)
3700{
3701 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);
3702
3703 if (w->wd >= 0)
3704 {
3705 struct statfs sfs;
3706
3707 /* now local changes will be tracked by inotify, but remote changes won't */
3708 /* unless the filesystem is known to be local, we therefore still poll */
3709 /* also do poll on <2.6.25, but with normal frequency */
3710
3711 if (!fs_2625)
3712 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3713 else if (!statfs (w->path, &sfs)
3714 && (sfs.f_type == 0x1373 /* devfs */
3715 || sfs.f_type == 0xEF53 /* ext2/3 */
3716 || sfs.f_type == 0x3153464a /* jfs */
3717 || sfs.f_type == 0x52654973 /* reiser3 */
3718 || sfs.f_type == 0x01021994 /* tempfs */
3719 || sfs.f_type == 0x58465342 /* xfs */))
3720 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3721 else
3722 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1466 { 3723 }
1467#if WIN32 3724 else
1468 signal (w->signum, sighandler); 3725 {
3726 /* can't use inotify, continue to stat */
3727 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3728
3729 /* if path is not there, monitor some parent directory for speedup hints */
3730 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3731 /* but an efficiency issue only */
3732 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
3733 {
3734 char path [4096];
3735 strcpy (path, w->path);
3736
3737 do
3738 {
3739 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
3740 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
3741
3742 char *pend = strrchr (path, '/');
3743
3744 if (!pend || pend == path)
3745 break;
3746
3747 *pend = 0;
3748 w->wd = inotify_add_watch (fs_fd, path, mask);
3749 }
3750 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3751 }
3752 }
3753
3754 if (w->wd >= 0)
3755 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3756
3757 /* now re-arm timer, if required */
3758 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3759 ev_timer_again (EV_A_ &w->timer);
3760 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3761}
3762
3763static void noinline
3764infy_del (EV_P_ ev_stat *w)
3765{
3766 int slot;
3767 int wd = w->wd;
3768
3769 if (wd < 0)
3770 return;
3771
3772 w->wd = -2;
3773 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3774 wlist_del (&fs_hash [slot].head, (WL)w);
3775
3776 /* remove this watcher, if others are watching it, they will rearm */
3777 inotify_rm_watch (fs_fd, wd);
3778}
3779
3780static void noinline
3781infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3782{
3783 if (slot < 0)
3784 /* overflow, need to check for all hash slots */
3785 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3786 infy_wd (EV_A_ slot, wd, ev);
3787 else
3788 {
3789 WL w_;
3790
3791 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3792 {
3793 ev_stat *w = (ev_stat *)w_;
3794 w_ = w_->next; /* lets us remove this watcher and all before it */
3795
3796 if (w->wd == wd || wd == -1)
3797 {
3798 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3799 {
3800 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3801 w->wd = -1;
3802 infy_add (EV_A_ w); /* re-add, no matter what */
3803 }
3804
3805 stat_timer_cb (EV_A_ &w->timer, 0);
3806 }
3807 }
3808 }
3809}
3810
3811static void
3812infy_cb (EV_P_ ev_io *w, int revents)
3813{
3814 char buf [EV_INOTIFY_BUFSIZE];
3815 int ofs;
3816 int len = read (fs_fd, buf, sizeof (buf));
3817
3818 for (ofs = 0; ofs < len; )
3819 {
3820 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3821 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3822 ofs += sizeof (struct inotify_event) + ev->len;
3823 }
3824}
3825
3826inline_size void ecb_cold
3827ev_check_2625 (EV_P)
3828{
3829 /* kernels < 2.6.25 are borked
3830 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3831 */
3832 if (ev_linux_version () < 0x020619)
3833 return;
3834
3835 fs_2625 = 1;
3836}
3837
3838inline_size int
3839infy_newfd (void)
3840{
3841#if defined IN_CLOEXEC && defined IN_NONBLOCK
3842 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3843 if (fd >= 0)
3844 return fd;
3845#endif
3846 return inotify_init ();
3847}
3848
3849inline_size void
3850infy_init (EV_P)
3851{
3852 if (fs_fd != -2)
3853 return;
3854
3855 fs_fd = -1;
3856
3857 ev_check_2625 (EV_A);
3858
3859 fs_fd = infy_newfd ();
3860
3861 if (fs_fd >= 0)
3862 {
3863 fd_intern (fs_fd);
3864 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3865 ev_set_priority (&fs_w, EV_MAXPRI);
3866 ev_io_start (EV_A_ &fs_w);
3867 ev_unref (EV_A);
3868 }
3869}
3870
3871inline_size void
3872infy_fork (EV_P)
3873{
3874 int slot;
3875
3876 if (fs_fd < 0)
3877 return;
3878
3879 ev_ref (EV_A);
3880 ev_io_stop (EV_A_ &fs_w);
3881 close (fs_fd);
3882 fs_fd = infy_newfd ();
3883
3884 if (fs_fd >= 0)
3885 {
3886 fd_intern (fs_fd);
3887 ev_io_set (&fs_w, fs_fd, EV_READ);
3888 ev_io_start (EV_A_ &fs_w);
3889 ev_unref (EV_A);
3890 }
3891
3892 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3893 {
3894 WL w_ = fs_hash [slot].head;
3895 fs_hash [slot].head = 0;
3896
3897 while (w_)
3898 {
3899 ev_stat *w = (ev_stat *)w_;
3900 w_ = w_->next; /* lets us add this watcher */
3901
3902 w->wd = -1;
3903
3904 if (fs_fd >= 0)
3905 infy_add (EV_A_ w); /* re-add, no matter what */
3906 else
3907 {
3908 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3909 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3910 ev_timer_again (EV_A_ &w->timer);
3911 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3912 }
3913 }
3914 }
3915}
3916
3917#endif
3918
3919#ifdef _WIN32
3920# define EV_LSTAT(p,b) _stati64 (p, b)
1469#else 3921#else
1470 struct sigaction sa; 3922# define EV_LSTAT(p,b) lstat (p, b)
1471 sa.sa_handler = sighandler;
1472 sigfillset (&sa.sa_mask);
1473 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1474 sigaction (w->signum, &sa, 0);
1475#endif 3923#endif
1476 }
1477}
1478 3924
1479void 3925void
1480ev_signal_stop (EV_P_ struct ev_signal *w) 3926ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
1481{ 3927{
1482 ev_clear_pending (EV_A_ (W)w); 3928 if (lstat (w->path, &w->attr) < 0)
1483 if (!ev_is_active (w)) 3929 w->attr.st_nlink = 0;
3930 else if (!w->attr.st_nlink)
3931 w->attr.st_nlink = 1;
3932}
3933
3934static void noinline
3935stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3936{
3937 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3938
3939 ev_statdata prev = w->attr;
3940 ev_stat_stat (EV_A_ w);
3941
3942 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3943 if (
3944 prev.st_dev != w->attr.st_dev
3945 || prev.st_ino != w->attr.st_ino
3946 || prev.st_mode != w->attr.st_mode
3947 || prev.st_nlink != w->attr.st_nlink
3948 || prev.st_uid != w->attr.st_uid
3949 || prev.st_gid != w->attr.st_gid
3950 || prev.st_rdev != w->attr.st_rdev
3951 || prev.st_size != w->attr.st_size
3952 || prev.st_atime != w->attr.st_atime
3953 || prev.st_mtime != w->attr.st_mtime
3954 || prev.st_ctime != w->attr.st_ctime
3955 ) {
3956 /* we only update w->prev on actual differences */
3957 /* in case we test more often than invoke the callback, */
3958 /* to ensure that prev is always different to attr */
3959 w->prev = prev;
3960
3961 #if EV_USE_INOTIFY
3962 if (fs_fd >= 0)
3963 {
3964 infy_del (EV_A_ w);
3965 infy_add (EV_A_ w);
3966 ev_stat_stat (EV_A_ w); /* avoid race... */
3967 }
3968 #endif
3969
3970 ev_feed_event (EV_A_ w, EV_STAT);
3971 }
3972}
3973
3974void
3975ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3976{
3977 if (expect_false (ev_is_active (w)))
1484 return; 3978 return;
1485 3979
1486 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3980 ev_stat_stat (EV_A_ w);
3981
3982 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3983 w->interval = MIN_STAT_INTERVAL;
3984
3985 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3986 ev_set_priority (&w->timer, ev_priority (w));
3987
3988#if EV_USE_INOTIFY
3989 infy_init (EV_A);
3990
3991 if (fs_fd >= 0)
3992 infy_add (EV_A_ w);
3993 else
3994#endif
3995 {
3996 ev_timer_again (EV_A_ &w->timer);
3997 ev_unref (EV_A);
3998 }
3999
4000 ev_start (EV_A_ (W)w, 1);
4001
4002 EV_FREQUENT_CHECK;
4003}
4004
4005void
4006ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
4007{
4008 clear_pending (EV_A_ (W)w);
4009 if (expect_false (!ev_is_active (w)))
4010 return;
4011
4012 EV_FREQUENT_CHECK;
4013
4014#if EV_USE_INOTIFY
4015 infy_del (EV_A_ w);
4016#endif
4017
4018 if (ev_is_active (&w->timer))
4019 {
4020 ev_ref (EV_A);
4021 ev_timer_stop (EV_A_ &w->timer);
4022 }
4023
1487 ev_stop (EV_A_ (W)w); 4024 ev_stop (EV_A_ (W)w);
1488 4025
1489 if (!signals [w->signum - 1].head) 4026 EV_FREQUENT_CHECK;
1490 signal (w->signum, SIG_DFL);
1491} 4027}
4028#endif
1492 4029
4030#if EV_IDLE_ENABLE
1493void 4031void
1494ev_child_start (EV_P_ struct ev_child *w) 4032ev_idle_start (EV_P_ ev_idle *w) EV_THROW
1495{ 4033{
1496#if EV_MULTIPLICITY
1497 assert (("child watchers are only supported in the default loop", loop == default_loop));
1498#endif
1499 if (ev_is_active (w)) 4034 if (expect_false (ev_is_active (w)))
1500 return; 4035 return;
1501 4036
4037 pri_adjust (EV_A_ (W)w);
4038
4039 EV_FREQUENT_CHECK;
4040
4041 {
4042 int active = ++idlecnt [ABSPRI (w)];
4043
4044 ++idleall;
4045 ev_start (EV_A_ (W)w, active);
4046
4047 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
4048 idles [ABSPRI (w)][active - 1] = w;
4049 }
4050
4051 EV_FREQUENT_CHECK;
4052}
4053
4054void
4055ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
4056{
4057 clear_pending (EV_A_ (W)w);
4058 if (expect_false (!ev_is_active (w)))
4059 return;
4060
4061 EV_FREQUENT_CHECK;
4062
4063 {
4064 int active = ev_active (w);
4065
4066 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
4067 ev_active (idles [ABSPRI (w)][active - 1]) = active;
4068
4069 ev_stop (EV_A_ (W)w);
4070 --idleall;
4071 }
4072
4073 EV_FREQUENT_CHECK;
4074}
4075#endif
4076
4077#if EV_PREPARE_ENABLE
4078void
4079ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
4080{
4081 if (expect_false (ev_is_active (w)))
4082 return;
4083
4084 EV_FREQUENT_CHECK;
4085
4086 ev_start (EV_A_ (W)w, ++preparecnt);
4087 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
4088 prepares [preparecnt - 1] = w;
4089
4090 EV_FREQUENT_CHECK;
4091}
4092
4093void
4094ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
4095{
4096 clear_pending (EV_A_ (W)w);
4097 if (expect_false (!ev_is_active (w)))
4098 return;
4099
4100 EV_FREQUENT_CHECK;
4101
4102 {
4103 int active = ev_active (w);
4104
4105 prepares [active - 1] = prepares [--preparecnt];
4106 ev_active (prepares [active - 1]) = active;
4107 }
4108
4109 ev_stop (EV_A_ (W)w);
4110
4111 EV_FREQUENT_CHECK;
4112}
4113#endif
4114
4115#if EV_CHECK_ENABLE
4116void
4117ev_check_start (EV_P_ ev_check *w) EV_THROW
4118{
4119 if (expect_false (ev_is_active (w)))
4120 return;
4121
4122 EV_FREQUENT_CHECK;
4123
4124 ev_start (EV_A_ (W)w, ++checkcnt);
4125 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
4126 checks [checkcnt - 1] = w;
4127
4128 EV_FREQUENT_CHECK;
4129}
4130
4131void
4132ev_check_stop (EV_P_ ev_check *w) EV_THROW
4133{
4134 clear_pending (EV_A_ (W)w);
4135 if (expect_false (!ev_is_active (w)))
4136 return;
4137
4138 EV_FREQUENT_CHECK;
4139
4140 {
4141 int active = ev_active (w);
4142
4143 checks [active - 1] = checks [--checkcnt];
4144 ev_active (checks [active - 1]) = active;
4145 }
4146
4147 ev_stop (EV_A_ (W)w);
4148
4149 EV_FREQUENT_CHECK;
4150}
4151#endif
4152
4153#if EV_EMBED_ENABLE
4154void noinline
4155ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
4156{
4157 ev_run (w->other, EVRUN_NOWAIT);
4158}
4159
4160static void
4161embed_io_cb (EV_P_ ev_io *io, int revents)
4162{
4163 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
4164
4165 if (ev_cb (w))
4166 ev_feed_event (EV_A_ (W)w, EV_EMBED);
4167 else
4168 ev_run (w->other, EVRUN_NOWAIT);
4169}
4170
4171static void
4172embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4173{
4174 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4175
4176 {
4177 EV_P = w->other;
4178
4179 while (fdchangecnt)
4180 {
4181 fd_reify (EV_A);
4182 ev_run (EV_A_ EVRUN_NOWAIT);
4183 }
4184 }
4185}
4186
4187static void
4188embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4189{
4190 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4191
4192 ev_embed_stop (EV_A_ w);
4193
4194 {
4195 EV_P = w->other;
4196
4197 ev_loop_fork (EV_A);
4198 ev_run (EV_A_ EVRUN_NOWAIT);
4199 }
4200
4201 ev_embed_start (EV_A_ w);
4202}
4203
4204#if 0
4205static void
4206embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4207{
4208 ev_idle_stop (EV_A_ idle);
4209}
4210#endif
4211
4212void
4213ev_embed_start (EV_P_ ev_embed *w) EV_THROW
4214{
4215 if (expect_false (ev_is_active (w)))
4216 return;
4217
4218 {
4219 EV_P = w->other;
4220 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4221 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4222 }
4223
4224 EV_FREQUENT_CHECK;
4225
4226 ev_set_priority (&w->io, ev_priority (w));
4227 ev_io_start (EV_A_ &w->io);
4228
4229 ev_prepare_init (&w->prepare, embed_prepare_cb);
4230 ev_set_priority (&w->prepare, EV_MINPRI);
4231 ev_prepare_start (EV_A_ &w->prepare);
4232
4233 ev_fork_init (&w->fork, embed_fork_cb);
4234 ev_fork_start (EV_A_ &w->fork);
4235
4236 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4237
1502 ev_start (EV_A_ (W)w, 1); 4238 ev_start (EV_A_ (W)w, 1);
1503 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 4239
4240 EV_FREQUENT_CHECK;
1504} 4241}
1505 4242
1506void 4243void
1507ev_child_stop (EV_P_ struct ev_child *w) 4244ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
1508{ 4245{
1509 ev_clear_pending (EV_A_ (W)w); 4246 clear_pending (EV_A_ (W)w);
1510 if (ev_is_active (w)) 4247 if (expect_false (!ev_is_active (w)))
1511 return; 4248 return;
1512 4249
1513 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 4250 EV_FREQUENT_CHECK;
4251
4252 ev_io_stop (EV_A_ &w->io);
4253 ev_prepare_stop (EV_A_ &w->prepare);
4254 ev_fork_stop (EV_A_ &w->fork);
4255
1514 ev_stop (EV_A_ (W)w); 4256 ev_stop (EV_A_ (W)w);
4257
4258 EV_FREQUENT_CHECK;
1515} 4259}
4260#endif
4261
4262#if EV_FORK_ENABLE
4263void
4264ev_fork_start (EV_P_ ev_fork *w) EV_THROW
4265{
4266 if (expect_false (ev_is_active (w)))
4267 return;
4268
4269 EV_FREQUENT_CHECK;
4270
4271 ev_start (EV_A_ (W)w, ++forkcnt);
4272 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4273 forks [forkcnt - 1] = w;
4274
4275 EV_FREQUENT_CHECK;
4276}
4277
4278void
4279ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
4280{
4281 clear_pending (EV_A_ (W)w);
4282 if (expect_false (!ev_is_active (w)))
4283 return;
4284
4285 EV_FREQUENT_CHECK;
4286
4287 {
4288 int active = ev_active (w);
4289
4290 forks [active - 1] = forks [--forkcnt];
4291 ev_active (forks [active - 1]) = active;
4292 }
4293
4294 ev_stop (EV_A_ (W)w);
4295
4296 EV_FREQUENT_CHECK;
4297}
4298#endif
4299
4300#if EV_CLEANUP_ENABLE
4301void
4302ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4303{
4304 if (expect_false (ev_is_active (w)))
4305 return;
4306
4307 EV_FREQUENT_CHECK;
4308
4309 ev_start (EV_A_ (W)w, ++cleanupcnt);
4310 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4311 cleanups [cleanupcnt - 1] = w;
4312
4313 /* cleanup watchers should never keep a refcount on the loop */
4314 ev_unref (EV_A);
4315 EV_FREQUENT_CHECK;
4316}
4317
4318void
4319ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4320{
4321 clear_pending (EV_A_ (W)w);
4322 if (expect_false (!ev_is_active (w)))
4323 return;
4324
4325 EV_FREQUENT_CHECK;
4326 ev_ref (EV_A);
4327
4328 {
4329 int active = ev_active (w);
4330
4331 cleanups [active - 1] = cleanups [--cleanupcnt];
4332 ev_active (cleanups [active - 1]) = active;
4333 }
4334
4335 ev_stop (EV_A_ (W)w);
4336
4337 EV_FREQUENT_CHECK;
4338}
4339#endif
4340
4341#if EV_ASYNC_ENABLE
4342void
4343ev_async_start (EV_P_ ev_async *w) EV_THROW
4344{
4345 if (expect_false (ev_is_active (w)))
4346 return;
4347
4348 w->sent = 0;
4349
4350 evpipe_init (EV_A);
4351
4352 EV_FREQUENT_CHECK;
4353
4354 ev_start (EV_A_ (W)w, ++asynccnt);
4355 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4356 asyncs [asynccnt - 1] = w;
4357
4358 EV_FREQUENT_CHECK;
4359}
4360
4361void
4362ev_async_stop (EV_P_ ev_async *w) EV_THROW
4363{
4364 clear_pending (EV_A_ (W)w);
4365 if (expect_false (!ev_is_active (w)))
4366 return;
4367
4368 EV_FREQUENT_CHECK;
4369
4370 {
4371 int active = ev_active (w);
4372
4373 asyncs [active - 1] = asyncs [--asynccnt];
4374 ev_active (asyncs [active - 1]) = active;
4375 }
4376
4377 ev_stop (EV_A_ (W)w);
4378
4379 EV_FREQUENT_CHECK;
4380}
4381
4382void
4383ev_async_send (EV_P_ ev_async *w) EV_THROW
4384{
4385 w->sent = 1;
4386 evpipe_write (EV_A_ &async_pending);
4387}
4388#endif
1516 4389
1517/*****************************************************************************/ 4390/*****************************************************************************/
1518 4391
1519struct ev_once 4392struct ev_once
1520{ 4393{
1521 struct ev_io io; 4394 ev_io io;
1522 struct ev_timer to; 4395 ev_timer to;
1523 void (*cb)(int revents, void *arg); 4396 void (*cb)(int revents, void *arg);
1524 void *arg; 4397 void *arg;
1525}; 4398};
1526 4399
1527static void 4400static void
1528once_cb (EV_P_ struct ev_once *once, int revents) 4401once_cb (EV_P_ struct ev_once *once, int revents)
1529{ 4402{
1530 void (*cb)(int revents, void *arg) = once->cb; 4403 void (*cb)(int revents, void *arg) = once->cb;
1531 void *arg = once->arg; 4404 void *arg = once->arg;
1532 4405
1533 ev_io_stop (EV_A_ &once->io); 4406 ev_io_stop (EV_A_ &once->io);
1534 ev_timer_stop (EV_A_ &once->to); 4407 ev_timer_stop (EV_A_ &once->to);
1535 ev_free (once); 4408 ev_free (once);
1536 4409
1537 cb (revents, arg); 4410 cb (revents, arg);
1538} 4411}
1539 4412
1540static void 4413static void
1541once_cb_io (EV_P_ struct ev_io *w, int revents) 4414once_cb_io (EV_P_ ev_io *w, int revents)
1542{ 4415{
1543 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4416 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4417
4418 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1544} 4419}
1545 4420
1546static void 4421static void
1547once_cb_to (EV_P_ struct ev_timer *w, int revents) 4422once_cb_to (EV_P_ ev_timer *w, int revents)
1548{ 4423{
1549 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4424 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4425
4426 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1550} 4427}
1551 4428
1552void 4429void
1553ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4430ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
1554{ 4431{
1555 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4432 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1556 4433
1557 if (!once) 4434 if (expect_false (!once))
4435 {
1558 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4436 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1559 else 4437 return;
1560 { 4438 }
4439
1561 once->cb = cb; 4440 once->cb = cb;
1562 once->arg = arg; 4441 once->arg = arg;
1563 4442
1564 ev_watcher_init (&once->io, once_cb_io); 4443 ev_init (&once->io, once_cb_io);
1565 if (fd >= 0) 4444 if (fd >= 0)
4445 {
4446 ev_io_set (&once->io, fd, events);
4447 ev_io_start (EV_A_ &once->io);
4448 }
4449
4450 ev_init (&once->to, once_cb_to);
4451 if (timeout >= 0.)
4452 {
4453 ev_timer_set (&once->to, timeout, 0.);
4454 ev_timer_start (EV_A_ &once->to);
4455 }
4456}
4457
4458/*****************************************************************************/
4459
4460#if EV_WALK_ENABLE
4461void ecb_cold
4462ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4463{
4464 int i, j;
4465 ev_watcher_list *wl, *wn;
4466
4467 if (types & (EV_IO | EV_EMBED))
4468 for (i = 0; i < anfdmax; ++i)
4469 for (wl = anfds [i].head; wl; )
1566 { 4470 {
1567 ev_io_set (&once->io, fd, events); 4471 wn = wl->next;
1568 ev_io_start (EV_A_ &once->io); 4472
4473#if EV_EMBED_ENABLE
4474 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4475 {
4476 if (types & EV_EMBED)
4477 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4478 }
4479 else
4480#endif
4481#if EV_USE_INOTIFY
4482 if (ev_cb ((ev_io *)wl) == infy_cb)
4483 ;
4484 else
4485#endif
4486 if ((ev_io *)wl != &pipe_w)
4487 if (types & EV_IO)
4488 cb (EV_A_ EV_IO, wl);
4489
4490 wl = wn;
1569 } 4491 }
1570 4492
1571 ev_watcher_init (&once->to, once_cb_to); 4493 if (types & (EV_TIMER | EV_STAT))
1572 if (timeout >= 0.) 4494 for (i = timercnt + HEAP0; i-- > HEAP0; )
4495#if EV_STAT_ENABLE
4496 /*TODO: timer is not always active*/
4497 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1573 { 4498 {
1574 ev_timer_set (&once->to, timeout, 0.); 4499 if (types & EV_STAT)
1575 ev_timer_start (EV_A_ &once->to); 4500 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1576 } 4501 }
1577 } 4502 else
1578} 4503#endif
4504 if (types & EV_TIMER)
4505 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1579 4506
4507#if EV_PERIODIC_ENABLE
4508 if (types & EV_PERIODIC)
4509 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4510 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4511#endif
4512
4513#if EV_IDLE_ENABLE
4514 if (types & EV_IDLE)
4515 for (j = NUMPRI; j--; )
4516 for (i = idlecnt [j]; i--; )
4517 cb (EV_A_ EV_IDLE, idles [j][i]);
4518#endif
4519
4520#if EV_FORK_ENABLE
4521 if (types & EV_FORK)
4522 for (i = forkcnt; i--; )
4523 if (ev_cb (forks [i]) != embed_fork_cb)
4524 cb (EV_A_ EV_FORK, forks [i]);
4525#endif
4526
4527#if EV_ASYNC_ENABLE
4528 if (types & EV_ASYNC)
4529 for (i = asynccnt; i--; )
4530 cb (EV_A_ EV_ASYNC, asyncs [i]);
4531#endif
4532
4533#if EV_PREPARE_ENABLE
4534 if (types & EV_PREPARE)
4535 for (i = preparecnt; i--; )
4536# if EV_EMBED_ENABLE
4537 if (ev_cb (prepares [i]) != embed_prepare_cb)
4538# endif
4539 cb (EV_A_ EV_PREPARE, prepares [i]);
4540#endif
4541
4542#if EV_CHECK_ENABLE
4543 if (types & EV_CHECK)
4544 for (i = checkcnt; i--; )
4545 cb (EV_A_ EV_CHECK, checks [i]);
4546#endif
4547
4548#if EV_SIGNAL_ENABLE
4549 if (types & EV_SIGNAL)
4550 for (i = 0; i < EV_NSIG - 1; ++i)
4551 for (wl = signals [i].head; wl; )
4552 {
4553 wn = wl->next;
4554 cb (EV_A_ EV_SIGNAL, wl);
4555 wl = wn;
4556 }
4557#endif
4558
4559#if EV_CHILD_ENABLE
4560 if (types & EV_CHILD)
4561 for (i = (EV_PID_HASHSIZE); i--; )
4562 for (wl = childs [i]; wl; )
4563 {
4564 wn = wl->next;
4565 cb (EV_A_ EV_CHILD, wl);
4566 wl = wn;
4567 }
4568#endif
4569/* EV_STAT 0x00001000 /* stat data changed */
4570/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4571}
4572#endif
4573
4574#if EV_MULTIPLICITY
4575 #include "ev_wrap.h"
4576#endif
4577

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