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Comparing libev/ev.c (file contents):
Revision 1.58 by root, Sun Nov 4 16:52:52 2007 UTC vs.
Revision 1.468 by root, Fri Sep 5 16:00:17 2014 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2012,2013 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met:
10 * 9 *
11 * * Redistributions of source code must retain the above copyright 10 * 1. Redistributions of source code must retain the above copyright notice,
12 * notice, this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
13 * 12 *
14 * * Redistributions in binary form must reproduce the above 13 * 2. Redistributions in binary form must reproduce the above copyright
15 * copyright notice, this list of conditions and the following 14 * notice, this list of conditions and the following disclaimer in the
16 * disclaimer in the documentation and/or other materials provided 15 * documentation and/or other materials provided with the distribution.
17 * with the distribution.
18 * 16 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
30 */ 38 */
31#ifndef EV_EMBED 39
40/* this big block deduces configuration from config.h */
41#ifndef EV_STANDALONE
42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H
44# else
32# include "config.h" 45# include "config.h"
33#endif 46# endif
34 47
35#include <math.h> 48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined EV_USE_CLOCK_SYSCALL
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
67
68# if HAVE_CLOCK_GETTIME
69# ifndef EV_USE_MONOTONIC
70# define EV_USE_MONOTONIC 1
71# endif
72# ifndef EV_USE_REALTIME
73# define EV_USE_REALTIME 0
74# endif
75# else
76# ifndef EV_USE_MONOTONIC
77# define EV_USE_MONOTONIC 0
78# endif
79# ifndef EV_USE_REALTIME
80# define EV_USE_REALTIME 0
81# endif
82# endif
83
84# if HAVE_NANOSLEEP
85# ifndef EV_USE_NANOSLEEP
86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
88# else
89# undef EV_USE_NANOSLEEP
90# define EV_USE_NANOSLEEP 0
91# endif
92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
94# ifndef EV_USE_SELECT
95# define EV_USE_SELECT EV_FEATURE_BACKENDS
96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
100# endif
101
102# if HAVE_POLL && HAVE_POLL_H
103# ifndef EV_USE_POLL
104# define EV_USE_POLL EV_FEATURE_BACKENDS
105# endif
106# else
107# undef EV_USE_POLL
108# define EV_USE_POLL 0
109# endif
110
111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
112# ifndef EV_USE_EPOLL
113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
118# endif
119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
121# ifndef EV_USE_KQUEUE
122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
127# endif
128
129# if HAVE_PORT_H && HAVE_PORT_CREATE
130# ifndef EV_USE_PORT
131# define EV_USE_PORT EV_FEATURE_BACKENDS
132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
136# endif
137
138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
139# ifndef EV_USE_INOTIFY
140# define EV_USE_INOTIFY EV_FEATURE_OS
141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
145# endif
146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
149# define EV_USE_SIGNALFD EV_FEATURE_OS
150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
154# endif
155
156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
163# endif
164
165#endif
166
36#include <stdlib.h> 167#include <stdlib.h>
37#include <unistd.h> 168#include <string.h>
38#include <fcntl.h> 169#include <fcntl.h>
39#include <signal.h>
40#include <stddef.h> 170#include <stddef.h>
41 171
42#include <stdio.h> 172#include <stdio.h>
43 173
44#include <assert.h> 174#include <assert.h>
45#include <errno.h> 175#include <errno.h>
46#include <sys/types.h> 176#include <sys/types.h>
177#include <time.h>
178#include <limits.h>
179
180#include <signal.h>
181
182#ifdef EV_H
183# include EV_H
184#else
185# include "ev.h"
186#endif
187
188#if EV_NO_THREADS
189# undef EV_NO_SMP
190# define EV_NO_SMP 1
191# undef ECB_NO_THREADS
192# define ECB_NO_THREADS 1
193#endif
194#if EV_NO_SMP
195# undef EV_NO_SMP
196# define ECB_NO_SMP 1
197#endif
198
47#ifndef WIN32 199#ifndef _WIN32
200# include <sys/time.h>
48# include <sys/wait.h> 201# include <sys/wait.h>
202# include <unistd.h>
203#else
204# include <io.h>
205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
207# include <windows.h>
208# ifndef EV_SELECT_IS_WINSOCKET
209# define EV_SELECT_IS_WINSOCKET 1
49#endif 210# endif
50#include <sys/time.h> 211# undef EV_AVOID_STDIO
51#include <time.h> 212#endif
52 213
53/**/ 214/* OS X, in its infinite idiocy, actually HARDCODES
215 * a limit of 1024 into their select. Where people have brains,
216 * OS X engineers apparently have a vacuum. Or maybe they were
217 * ordered to have a vacuum, or they do anything for money.
218 * This might help. Or not.
219 */
220#define _DARWIN_UNLIMITED_SELECT 1
221
222/* this block tries to deduce configuration from header-defined symbols and defaults */
223
224/* try to deduce the maximum number of signals on this platform */
225#if defined EV_NSIG
226/* use what's provided */
227#elif defined NSIG
228# define EV_NSIG (NSIG)
229#elif defined _NSIG
230# define EV_NSIG (_NSIG)
231#elif defined SIGMAX
232# define EV_NSIG (SIGMAX+1)
233#elif defined SIG_MAX
234# define EV_NSIG (SIG_MAX+1)
235#elif defined _SIG_MAX
236# define EV_NSIG (_SIG_MAX+1)
237#elif defined MAXSIG
238# define EV_NSIG (MAXSIG+1)
239#elif defined MAX_SIG
240# define EV_NSIG (MAX_SIG+1)
241#elif defined SIGARRAYSIZE
242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
243#elif defined _sys_nsig
244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
245#else
246# define EV_NSIG (8 * sizeof (sigset_t) + 1)
247#endif
248
249#ifndef EV_USE_FLOOR
250# define EV_USE_FLOOR 0
251#endif
252
253#ifndef EV_USE_CLOCK_SYSCALL
254# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
255# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
256# else
257# define EV_USE_CLOCK_SYSCALL 0
258# endif
259#endif
54 260
55#ifndef EV_USE_MONOTONIC 261#ifndef EV_USE_MONOTONIC
262# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
263# define EV_USE_MONOTONIC EV_FEATURE_OS
264# else
56# define EV_USE_MONOTONIC 1 265# define EV_USE_MONOTONIC 0
266# endif
267#endif
268
269#ifndef EV_USE_REALTIME
270# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
271#endif
272
273#ifndef EV_USE_NANOSLEEP
274# if _POSIX_C_SOURCE >= 199309L
275# define EV_USE_NANOSLEEP EV_FEATURE_OS
276# else
277# define EV_USE_NANOSLEEP 0
278# endif
57#endif 279#endif
58 280
59#ifndef EV_USE_SELECT 281#ifndef EV_USE_SELECT
60# define EV_USE_SELECT 1 282# define EV_USE_SELECT EV_FEATURE_BACKENDS
61#endif 283#endif
62 284
63#ifndef EV_USEV_POLL 285#ifndef EV_USE_POLL
64# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */ 286# ifdef _WIN32
287# define EV_USE_POLL 0
288# else
289# define EV_USE_POLL EV_FEATURE_BACKENDS
290# endif
65#endif 291#endif
66 292
67#ifndef EV_USE_EPOLL 293#ifndef EV_USE_EPOLL
294# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
295# define EV_USE_EPOLL EV_FEATURE_BACKENDS
296# else
68# define EV_USE_EPOLL 0 297# define EV_USE_EPOLL 0
298# endif
69#endif 299#endif
70 300
71#ifndef EV_USE_KQUEUE 301#ifndef EV_USE_KQUEUE
72# define EV_USE_KQUEUE 0 302# define EV_USE_KQUEUE 0
73#endif 303#endif
74 304
75#ifndef EV_USE_REALTIME 305#ifndef EV_USE_PORT
76# define EV_USE_REALTIME 1 306# define EV_USE_PORT 0
307#endif
308
309#ifndef EV_USE_INOTIFY
310# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
311# define EV_USE_INOTIFY EV_FEATURE_OS
312# else
313# define EV_USE_INOTIFY 0
77#endif 314# endif
315#endif
78 316
79/**/ 317#ifndef EV_PID_HASHSIZE
318# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
319#endif
320
321#ifndef EV_INOTIFY_HASHSIZE
322# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
323#endif
324
325#ifndef EV_USE_EVENTFD
326# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
327# define EV_USE_EVENTFD EV_FEATURE_OS
328# else
329# define EV_USE_EVENTFD 0
330# endif
331#endif
332
333#ifndef EV_USE_SIGNALFD
334# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
335# define EV_USE_SIGNALFD EV_FEATURE_OS
336# else
337# define EV_USE_SIGNALFD 0
338# endif
339#endif
340
341#if 0 /* debugging */
342# define EV_VERIFY 3
343# define EV_USE_4HEAP 1
344# define EV_HEAP_CACHE_AT 1
345#endif
346
347#ifndef EV_VERIFY
348# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
349#endif
350
351#ifndef EV_USE_4HEAP
352# define EV_USE_4HEAP EV_FEATURE_DATA
353#endif
354
355#ifndef EV_HEAP_CACHE_AT
356# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
357#endif
358
359#ifdef ANDROID
360/* supposedly, android doesn't typedef fd_mask */
361# undef EV_USE_SELECT
362# define EV_USE_SELECT 0
363/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
364# undef EV_USE_CLOCK_SYSCALL
365# define EV_USE_CLOCK_SYSCALL 0
366#endif
367
368/* aix's poll.h seems to cause lots of trouble */
369#ifdef _AIX
370/* AIX has a completely broken poll.h header */
371# undef EV_USE_POLL
372# define EV_USE_POLL 0
373#endif
374
375/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
376/* which makes programs even slower. might work on other unices, too. */
377#if EV_USE_CLOCK_SYSCALL
378# include <sys/syscall.h>
379# ifdef SYS_clock_gettime
380# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
381# undef EV_USE_MONOTONIC
382# define EV_USE_MONOTONIC 1
383# else
384# undef EV_USE_CLOCK_SYSCALL
385# define EV_USE_CLOCK_SYSCALL 0
386# endif
387#endif
388
389/* this block fixes any misconfiguration where we know we run into trouble otherwise */
80 390
81#ifndef CLOCK_MONOTONIC 391#ifndef CLOCK_MONOTONIC
82# undef EV_USE_MONOTONIC 392# undef EV_USE_MONOTONIC
83# define EV_USE_MONOTONIC 0 393# define EV_USE_MONOTONIC 0
84#endif 394#endif
… …
86#ifndef CLOCK_REALTIME 396#ifndef CLOCK_REALTIME
87# undef EV_USE_REALTIME 397# undef EV_USE_REALTIME
88# define EV_USE_REALTIME 0 398# define EV_USE_REALTIME 0
89#endif 399#endif
90 400
401#if !EV_STAT_ENABLE
402# undef EV_USE_INOTIFY
403# define EV_USE_INOTIFY 0
404#endif
405
406#if !EV_USE_NANOSLEEP
407/* hp-ux has it in sys/time.h, which we unconditionally include above */
408# if !defined _WIN32 && !defined __hpux
409# include <sys/select.h>
410# endif
411#endif
412
413#if EV_USE_INOTIFY
414# include <sys/statfs.h>
415# include <sys/inotify.h>
416/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
417# ifndef IN_DONT_FOLLOW
418# undef EV_USE_INOTIFY
419# define EV_USE_INOTIFY 0
420# endif
421#endif
422
423#if EV_USE_EVENTFD
424/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
425# include <stdint.h>
426# ifndef EFD_NONBLOCK
427# define EFD_NONBLOCK O_NONBLOCK
428# endif
429# ifndef EFD_CLOEXEC
430# ifdef O_CLOEXEC
431# define EFD_CLOEXEC O_CLOEXEC
432# else
433# define EFD_CLOEXEC 02000000
434# endif
435# endif
436EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
437#endif
438
439#if EV_USE_SIGNALFD
440/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
441# include <stdint.h>
442# ifndef SFD_NONBLOCK
443# define SFD_NONBLOCK O_NONBLOCK
444# endif
445# ifndef SFD_CLOEXEC
446# ifdef O_CLOEXEC
447# define SFD_CLOEXEC O_CLOEXEC
448# else
449# define SFD_CLOEXEC 02000000
450# endif
451# endif
452EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
453
454struct signalfd_siginfo
455{
456 uint32_t ssi_signo;
457 char pad[128 - sizeof (uint32_t)];
458};
459#endif
460
91/**/ 461/**/
92 462
463#if EV_VERIFY >= 3
464# define EV_FREQUENT_CHECK ev_verify (EV_A)
465#else
466# define EV_FREQUENT_CHECK do { } while (0)
467#endif
468
469/*
470 * This is used to work around floating point rounding problems.
471 * This value is good at least till the year 4000.
472 */
473#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
474/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
475
93#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 476#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
94#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 477#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
95#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
96/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
97 478
98#ifndef EV_EMBED 479#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
99# include "ev.h" 480#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
481
482/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
483/* ECB.H BEGIN */
484/*
485 * libecb - http://software.schmorp.de/pkg/libecb
486 *
487 * Copyright (©) 2009-2014 Marc Alexander Lehmann <libecb@schmorp.de>
488 * Copyright (©) 2011 Emanuele Giaquinta
489 * All rights reserved.
490 *
491 * Redistribution and use in source and binary forms, with or without modifica-
492 * tion, are permitted provided that the following conditions are met:
493 *
494 * 1. Redistributions of source code must retain the above copyright notice,
495 * this list of conditions and the following disclaimer.
496 *
497 * 2. Redistributions in binary form must reproduce the above copyright
498 * notice, this list of conditions and the following disclaimer in the
499 * documentation and/or other materials provided with the distribution.
500 *
501 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
502 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
503 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
504 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
505 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
506 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
507 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
508 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
509 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
510 * OF THE POSSIBILITY OF SUCH DAMAGE.
511 *
512 * Alternatively, the contents of this file may be used under the terms of
513 * the GNU General Public License ("GPL") version 2 or any later version,
514 * in which case the provisions of the GPL are applicable instead of
515 * the above. If you wish to allow the use of your version of this file
516 * only under the terms of the GPL and not to allow others to use your
517 * version of this file under the BSD license, indicate your decision
518 * by deleting the provisions above and replace them with the notice
519 * and other provisions required by the GPL. If you do not delete the
520 * provisions above, a recipient may use your version of this file under
521 * either the BSD or the GPL.
522 */
523
524#ifndef ECB_H
525#define ECB_H
526
527/* 16 bits major, 16 bits minor */
528#define ECB_VERSION 0x00010003
529
530#ifdef _WIN32
531 typedef signed char int8_t;
532 typedef unsigned char uint8_t;
533 typedef signed short int16_t;
534 typedef unsigned short uint16_t;
535 typedef signed int int32_t;
536 typedef unsigned int uint32_t;
537 #if __GNUC__
538 typedef signed long long int64_t;
539 typedef unsigned long long uint64_t;
540 #else /* _MSC_VER || __BORLANDC__ */
541 typedef signed __int64 int64_t;
542 typedef unsigned __int64 uint64_t;
100#endif 543 #endif
101 544 #ifdef _WIN64
102#if __GNUC__ >= 3 545 #define ECB_PTRSIZE 8
103# define expect(expr,value) __builtin_expect ((expr),(value)) 546 typedef uint64_t uintptr_t;
104# define inline inline 547 typedef int64_t intptr_t;
548 #else
549 #define ECB_PTRSIZE 4
550 typedef uint32_t uintptr_t;
551 typedef int32_t intptr_t;
552 #endif
105#else 553#else
106# define expect(expr,value) (expr) 554 #include <inttypes.h>
107# define inline static 555 #if UINTMAX_MAX > 0xffffffffU
556 #define ECB_PTRSIZE 8
557 #else
558 #define ECB_PTRSIZE 4
108#endif 559 #endif
560#endif
109 561
110#define expect_false(expr) expect ((expr) != 0, 0) 562/* work around x32 idiocy by defining proper macros */
111#define expect_true(expr) expect ((expr) != 0, 1) 563#if __amd64 || __x86_64 || _M_AMD64 || _M_X64
564 #if _ILP32
565 #define ECB_AMD64_X32 1
566 #else
567 #define ECB_AMD64 1
568 #endif
569#endif
112 570
113#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 571/* many compilers define _GNUC_ to some versions but then only implement
114#define ABSPRI(w) ((w)->priority - EV_MINPRI) 572 * what their idiot authors think are the "more important" extensions,
573 * causing enormous grief in return for some better fake benchmark numbers.
574 * or so.
575 * we try to detect these and simply assume they are not gcc - if they have
576 * an issue with that they should have done it right in the first place.
577 */
578#ifndef ECB_GCC_VERSION
579 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
580 #define ECB_GCC_VERSION(major,minor) 0
581 #else
582 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
583 #endif
584#endif
115 585
116typedef struct ev_watcher *W; 586#define ECB_CPP (__cplusplus+0)
117typedef struct ev_watcher_list *WL; 587#define ECB_CPP11 (__cplusplus >= 201103L)
118typedef struct ev_watcher_time *WT;
119 588
120static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 589#if ECB_CPP
590 #define ECB_C 0
591 #define ECB_STDC_VERSION 0
592#else
593 #define ECB_C 1
594 #define ECB_STDC_VERSION __STDC_VERSION__
595#endif
596
597#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
598#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
599
600#if ECB_CPP
601 #define ECB_EXTERN_C extern "C"
602 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
603 #define ECB_EXTERN_C_END }
604#else
605 #define ECB_EXTERN_C extern
606 #define ECB_EXTERN_C_BEG
607 #define ECB_EXTERN_C_END
608#endif
121 609
122/*****************************************************************************/ 610/*****************************************************************************/
123 611
612/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
613/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
614
615#if ECB_NO_THREADS
616 #define ECB_NO_SMP 1
617#endif
618
619#if ECB_NO_SMP
620 #define ECB_MEMORY_FENCE do { } while (0)
621#endif
622
623#ifndef ECB_MEMORY_FENCE
624 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
625 #if __i386 || __i386__
626 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
627 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
628 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
629 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
630 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
631 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
632 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
633 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
634 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
635 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
636 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
637 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
638 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
639 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
640 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
641 #elif __aarch64__
642 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
643 #elif (__sparc || __sparc__) && !__sparcv8
644 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
645 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
646 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
647 #elif defined __s390__ || defined __s390x__
648 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
649 #elif defined __mips__
650 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
651 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
652 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
653 #elif defined __alpha__
654 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
655 #elif defined __hppa__
656 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
657 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
658 #elif defined __ia64__
659 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
660 #elif defined __m68k__
661 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
662 #elif defined __m88k__
663 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
664 #elif defined __sh__
665 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
666 #endif
667 #endif
668#endif
669
670#ifndef ECB_MEMORY_FENCE
671 #if ECB_GCC_VERSION(4,7)
672 /* see comment below (stdatomic.h) about the C11 memory model. */
673 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
674 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
675 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
676
677 /* The __has_feature syntax from clang is so misdesigned that we cannot use it
678 * without risking compile time errors with other compilers. We *could*
679 * define our own ecb_clang_has_feature, but I just can't be bothered to work
680 * around this shit time and again.
681 * #elif defined __clang && __has_feature (cxx_atomic)
682 * // see comment below (stdatomic.h) about the C11 memory model.
683 * #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
684 * #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
685 * #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
686 */
687
688 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
689 #define ECB_MEMORY_FENCE __sync_synchronize ()
690 #elif _MSC_VER >= 1500 /* VC++ 2008 */
691 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
692 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
693 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
694 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
695 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
696 #elif _MSC_VER >= 1400 /* VC++ 2005 */
697 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
698 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
699 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
700 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
701 #elif defined _WIN32
702 #include <WinNT.h>
703 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
704 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
705 #include <mbarrier.h>
706 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
707 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
708 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
709 #elif __xlC__
710 #define ECB_MEMORY_FENCE __sync ()
711 #endif
712#endif
713
714#ifndef ECB_MEMORY_FENCE
715 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
716 /* we assume that these memory fences work on all variables/all memory accesses, */
717 /* not just C11 atomics and atomic accesses */
718 #include <stdatomic.h>
719 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
720 /* any fence other than seq_cst, which isn't very efficient for us. */
721 /* Why that is, we don't know - either the C11 memory model is quite useless */
722 /* for most usages, or gcc and clang have a bug */
723 /* I *currently* lean towards the latter, and inefficiently implement */
724 /* all three of ecb's fences as a seq_cst fence */
725 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
726 /* for all __atomic_thread_fence's except seq_cst */
727 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
728 #endif
729#endif
730
731#ifndef ECB_MEMORY_FENCE
732 #if !ECB_AVOID_PTHREADS
733 /*
734 * if you get undefined symbol references to pthread_mutex_lock,
735 * or failure to find pthread.h, then you should implement
736 * the ECB_MEMORY_FENCE operations for your cpu/compiler
737 * OR provide pthread.h and link against the posix thread library
738 * of your system.
739 */
740 #include <pthread.h>
741 #define ECB_NEEDS_PTHREADS 1
742 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
743
744 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
745 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
746 #endif
747#endif
748
749#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
750 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
751#endif
752
753#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
754 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
755#endif
756
757/*****************************************************************************/
758
759#if __cplusplus
760 #define ecb_inline static inline
761#elif ECB_GCC_VERSION(2,5)
762 #define ecb_inline static __inline__
763#elif ECB_C99
764 #define ecb_inline static inline
765#else
766 #define ecb_inline static
767#endif
768
769#if ECB_GCC_VERSION(3,3)
770 #define ecb_restrict __restrict__
771#elif ECB_C99
772 #define ecb_restrict restrict
773#else
774 #define ecb_restrict
775#endif
776
777typedef int ecb_bool;
778
779#define ECB_CONCAT_(a, b) a ## b
780#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
781#define ECB_STRINGIFY_(a) # a
782#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
783
784#define ecb_function_ ecb_inline
785
786#if ECB_GCC_VERSION(3,1)
787 #define ecb_attribute(attrlist) __attribute__(attrlist)
788 #define ecb_is_constant(expr) __builtin_constant_p (expr)
789 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
790 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
791#else
792 #define ecb_attribute(attrlist)
793
794 /* possible C11 impl for integral types
795 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
796 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
797
798 #define ecb_is_constant(expr) 0
799 #define ecb_expect(expr,value) (expr)
800 #define ecb_prefetch(addr,rw,locality)
801#endif
802
803/* no emulation for ecb_decltype */
804#if ECB_GCC_VERSION(4,5)
805 #define ecb_decltype(x) __decltype(x)
806#elif ECB_GCC_VERSION(3,0)
807 #define ecb_decltype(x) __typeof(x)
808#endif
809
810#if _MSC_VER >= 1300
811 #define ecb_deprecated __declspec(deprecated)
812#else
813 #define ecb_deprecated ecb_attribute ((__deprecated__))
814#endif
815
816#define ecb_noinline ecb_attribute ((__noinline__))
817#define ecb_unused ecb_attribute ((__unused__))
818#define ecb_const ecb_attribute ((__const__))
819#define ecb_pure ecb_attribute ((__pure__))
820
821/* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx __declspec(noreturn) */
822#if ECB_C11
823 #define ecb_noreturn _Noreturn
824#else
825 #define ecb_noreturn ecb_attribute ((__noreturn__))
826#endif
827
828#if ECB_GCC_VERSION(4,3)
829 #define ecb_artificial ecb_attribute ((__artificial__))
830 #define ecb_hot ecb_attribute ((__hot__))
831 #define ecb_cold ecb_attribute ((__cold__))
832#else
833 #define ecb_artificial
834 #define ecb_hot
835 #define ecb_cold
836#endif
837
838/* put around conditional expressions if you are very sure that the */
839/* expression is mostly true or mostly false. note that these return */
840/* booleans, not the expression. */
841#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
842#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
843/* for compatibility to the rest of the world */
844#define ecb_likely(expr) ecb_expect_true (expr)
845#define ecb_unlikely(expr) ecb_expect_false (expr)
846
847/* count trailing zero bits and count # of one bits */
848#if ECB_GCC_VERSION(3,4)
849 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
850 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
851 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
852 #define ecb_ctz32(x) __builtin_ctz (x)
853 #define ecb_ctz64(x) __builtin_ctzll (x)
854 #define ecb_popcount32(x) __builtin_popcount (x)
855 /* no popcountll */
856#else
857 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
858 ecb_function_ int
859 ecb_ctz32 (uint32_t x)
860 {
861 int r = 0;
862
863 x &= ~x + 1; /* this isolates the lowest bit */
864
865#if ECB_branchless_on_i386
866 r += !!(x & 0xaaaaaaaa) << 0;
867 r += !!(x & 0xcccccccc) << 1;
868 r += !!(x & 0xf0f0f0f0) << 2;
869 r += !!(x & 0xff00ff00) << 3;
870 r += !!(x & 0xffff0000) << 4;
871#else
872 if (x & 0xaaaaaaaa) r += 1;
873 if (x & 0xcccccccc) r += 2;
874 if (x & 0xf0f0f0f0) r += 4;
875 if (x & 0xff00ff00) r += 8;
876 if (x & 0xffff0000) r += 16;
877#endif
878
879 return r;
880 }
881
882 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
883 ecb_function_ int
884 ecb_ctz64 (uint64_t x)
885 {
886 int shift = x & 0xffffffffU ? 0 : 32;
887 return ecb_ctz32 (x >> shift) + shift;
888 }
889
890 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
891 ecb_function_ int
892 ecb_popcount32 (uint32_t x)
893 {
894 x -= (x >> 1) & 0x55555555;
895 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
896 x = ((x >> 4) + x) & 0x0f0f0f0f;
897 x *= 0x01010101;
898
899 return x >> 24;
900 }
901
902 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
903 ecb_function_ int ecb_ld32 (uint32_t x)
904 {
905 int r = 0;
906
907 if (x >> 16) { x >>= 16; r += 16; }
908 if (x >> 8) { x >>= 8; r += 8; }
909 if (x >> 4) { x >>= 4; r += 4; }
910 if (x >> 2) { x >>= 2; r += 2; }
911 if (x >> 1) { r += 1; }
912
913 return r;
914 }
915
916 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
917 ecb_function_ int ecb_ld64 (uint64_t x)
918 {
919 int r = 0;
920
921 if (x >> 32) { x >>= 32; r += 32; }
922
923 return r + ecb_ld32 (x);
924 }
925#endif
926
927ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
928ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
929ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
930ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
931
932ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
933ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
934{
935 return ( (x * 0x0802U & 0x22110U)
936 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
937}
938
939ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
940ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
941{
942 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
943 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
944 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
945 x = ( x >> 8 ) | ( x << 8);
946
947 return x;
948}
949
950ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
951ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
952{
953 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
954 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
955 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
956 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
957 x = ( x >> 16 ) | ( x << 16);
958
959 return x;
960}
961
962/* popcount64 is only available on 64 bit cpus as gcc builtin */
963/* so for this version we are lazy */
964ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
965ecb_function_ int
966ecb_popcount64 (uint64_t x)
967{
968 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
969}
970
971ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
972ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
973ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
974ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
975ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
976ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
977ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
978ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
979
980ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
981ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
982ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
983ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
984ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
985ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
986ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
987ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
988
989#if ECB_GCC_VERSION(4,3)
990 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
991 #define ecb_bswap32(x) __builtin_bswap32 (x)
992 #define ecb_bswap64(x) __builtin_bswap64 (x)
993#else
994 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
995 ecb_function_ uint16_t
996 ecb_bswap16 (uint16_t x)
997 {
998 return ecb_rotl16 (x, 8);
999 }
1000
1001 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
1002 ecb_function_ uint32_t
1003 ecb_bswap32 (uint32_t x)
1004 {
1005 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1006 }
1007
1008 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
1009 ecb_function_ uint64_t
1010 ecb_bswap64 (uint64_t x)
1011 {
1012 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1013 }
1014#endif
1015
1016#if ECB_GCC_VERSION(4,5)
1017 #define ecb_unreachable() __builtin_unreachable ()
1018#else
1019 /* this seems to work fine, but gcc always emits a warning for it :/ */
1020 ecb_inline void ecb_unreachable (void) ecb_noreturn;
1021 ecb_inline void ecb_unreachable (void) { }
1022#endif
1023
1024/* try to tell the compiler that some condition is definitely true */
1025#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1026
1027ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
1028ecb_inline unsigned char
1029ecb_byteorder_helper (void)
1030{
1031 /* the union code still generates code under pressure in gcc, */
1032 /* but less than using pointers, and always seems to */
1033 /* successfully return a constant. */
1034 /* the reason why we have this horrible preprocessor mess */
1035 /* is to avoid it in all cases, at least on common architectures */
1036 /* or when using a recent enough gcc version (>= 4.6) */
1037#if __i386 || __i386__ || _M_X86 || __amd64 || __amd64__ || _M_X64
1038 return 0x44;
1039#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
1040 return 0x44;
1041#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
1042 return 0x11;
1043#else
1044 union
1045 {
1046 uint32_t i;
1047 uint8_t c;
1048 } u = { 0x11223344 };
1049 return u.c;
1050#endif
1051}
1052
1053ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
1054ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1055ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
1056ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1057
1058#if ECB_GCC_VERSION(3,0) || ECB_C99
1059 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1060#else
1061 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1062#endif
1063
1064#if __cplusplus
1065 template<typename T>
1066 static inline T ecb_div_rd (T val, T div)
1067 {
1068 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1069 }
1070 template<typename T>
1071 static inline T ecb_div_ru (T val, T div)
1072 {
1073 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1074 }
1075#else
1076 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1077 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1078#endif
1079
1080#if ecb_cplusplus_does_not_suck
1081 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1082 template<typename T, int N>
1083 static inline int ecb_array_length (const T (&arr)[N])
1084 {
1085 return N;
1086 }
1087#else
1088 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1089#endif
1090
1091/*******************************************************************************/
1092/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1093
1094/* basically, everything uses "ieee pure-endian" floating point numbers */
1095/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1096#if 0 \
1097 || __i386 || __i386__ \
1098 || __amd64 || __amd64__ || __x86_64 || __x86_64__ \
1099 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1100 || defined __s390__ || defined __s390x__ \
1101 || defined __mips__ \
1102 || defined __alpha__ \
1103 || defined __hppa__ \
1104 || defined __ia64__ \
1105 || defined __m68k__ \
1106 || defined __m88k__ \
1107 || defined __sh__ \
1108 || defined _M_IX86 || defined _M_AMD64 || defined _M_IA64 \
1109 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1110 || defined __aarch64__
1111 #define ECB_STDFP 1
1112 #include <string.h> /* for memcpy */
1113#else
1114 #define ECB_STDFP 0
1115#endif
1116
1117#ifndef ECB_NO_LIBM
1118
1119 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1120
1121 /* only the oldest of old doesn't have this one. solaris. */
1122 #ifdef INFINITY
1123 #define ECB_INFINITY INFINITY
1124 #else
1125 #define ECB_INFINITY HUGE_VAL
1126 #endif
1127
1128 #ifdef NAN
1129 #define ECB_NAN NAN
1130 #else
1131 #define ECB_NAN ECB_INFINITY
1132 #endif
1133
1134 /* converts an ieee half/binary16 to a float */
1135 ecb_function_ float ecb_binary16_to_float (uint16_t x) ecb_const;
1136 ecb_function_ float
1137 ecb_binary16_to_float (uint16_t x)
1138 {
1139 int e = (x >> 10) & 0x1f;
1140 int m = x & 0x3ff;
1141 float r;
1142
1143 if (!e ) r = ldexpf (m , -24);
1144 else if (e != 31) r = ldexpf (m + 0x400, e - 25);
1145 else if (m ) r = ECB_NAN;
1146 else r = ECB_INFINITY;
1147
1148 return x & 0x8000 ? -r : r;
1149 }
1150
1151 /* convert a float to ieee single/binary32 */
1152 ecb_function_ uint32_t ecb_float_to_binary32 (float x) ecb_const;
1153 ecb_function_ uint32_t
1154 ecb_float_to_binary32 (float x)
1155 {
1156 uint32_t r;
1157
1158 #if ECB_STDFP
1159 memcpy (&r, &x, 4);
1160 #else
1161 /* slow emulation, works for anything but -0 */
1162 uint32_t m;
1163 int e;
1164
1165 if (x == 0e0f ) return 0x00000000U;
1166 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1167 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1168 if (x != x ) return 0x7fbfffffU;
1169
1170 m = frexpf (x, &e) * 0x1000000U;
1171
1172 r = m & 0x80000000U;
1173
1174 if (r)
1175 m = -m;
1176
1177 if (e <= -126)
1178 {
1179 m &= 0xffffffU;
1180 m >>= (-125 - e);
1181 e = -126;
1182 }
1183
1184 r |= (e + 126) << 23;
1185 r |= m & 0x7fffffU;
1186 #endif
1187
1188 return r;
1189 }
1190
1191 /* converts an ieee single/binary32 to a float */
1192 ecb_function_ float ecb_binary32_to_float (uint32_t x) ecb_const;
1193 ecb_function_ float
1194 ecb_binary32_to_float (uint32_t x)
1195 {
1196 float r;
1197
1198 #if ECB_STDFP
1199 memcpy (&r, &x, 4);
1200 #else
1201 /* emulation, only works for normals and subnormals and +0 */
1202 int neg = x >> 31;
1203 int e = (x >> 23) & 0xffU;
1204
1205 x &= 0x7fffffU;
1206
1207 if (e)
1208 x |= 0x800000U;
1209 else
1210 e = 1;
1211
1212 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1213 r = ldexpf (x * (0.5f / 0x800000U), e - 126);
1214
1215 r = neg ? -r : r;
1216 #endif
1217
1218 return r;
1219 }
1220
1221 /* convert a double to ieee double/binary64 */
1222 ecb_function_ uint64_t ecb_double_to_binary64 (double x) ecb_const;
1223 ecb_function_ uint64_t
1224 ecb_double_to_binary64 (double x)
1225 {
1226 uint64_t r;
1227
1228 #if ECB_STDFP
1229 memcpy (&r, &x, 8);
1230 #else
1231 /* slow emulation, works for anything but -0 */
1232 uint64_t m;
1233 int e;
1234
1235 if (x == 0e0 ) return 0x0000000000000000U;
1236 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1237 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1238 if (x != x ) return 0X7ff7ffffffffffffU;
1239
1240 m = frexp (x, &e) * 0x20000000000000U;
1241
1242 r = m & 0x8000000000000000;;
1243
1244 if (r)
1245 m = -m;
1246
1247 if (e <= -1022)
1248 {
1249 m &= 0x1fffffffffffffU;
1250 m >>= (-1021 - e);
1251 e = -1022;
1252 }
1253
1254 r |= ((uint64_t)(e + 1022)) << 52;
1255 r |= m & 0xfffffffffffffU;
1256 #endif
1257
1258 return r;
1259 }
1260
1261 /* converts an ieee double/binary64 to a double */
1262 ecb_function_ double ecb_binary64_to_double (uint64_t x) ecb_const;
1263 ecb_function_ double
1264 ecb_binary64_to_double (uint64_t x)
1265 {
1266 double r;
1267
1268 #if ECB_STDFP
1269 memcpy (&r, &x, 8);
1270 #else
1271 /* emulation, only works for normals and subnormals and +0 */
1272 int neg = x >> 63;
1273 int e = (x >> 52) & 0x7ffU;
1274
1275 x &= 0xfffffffffffffU;
1276
1277 if (e)
1278 x |= 0x10000000000000U;
1279 else
1280 e = 1;
1281
1282 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1283 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1284
1285 r = neg ? -r : r;
1286 #endif
1287
1288 return r;
1289 }
1290
1291#endif
1292
1293#endif
1294
1295/* ECB.H END */
1296
1297#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1298/* if your architecture doesn't need memory fences, e.g. because it is
1299 * single-cpu/core, or if you use libev in a project that doesn't use libev
1300 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1301 * libev, in which cases the memory fences become nops.
1302 * alternatively, you can remove this #error and link against libpthread,
1303 * which will then provide the memory fences.
1304 */
1305# error "memory fences not defined for your architecture, please report"
1306#endif
1307
1308#ifndef ECB_MEMORY_FENCE
1309# define ECB_MEMORY_FENCE do { } while (0)
1310# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1311# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1312#endif
1313
1314#define expect_false(cond) ecb_expect_false (cond)
1315#define expect_true(cond) ecb_expect_true (cond)
1316#define noinline ecb_noinline
1317
1318#define inline_size ecb_inline
1319
1320#if EV_FEATURE_CODE
1321# define inline_speed ecb_inline
1322#else
1323# define inline_speed static noinline
1324#endif
1325
1326#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1327
1328#if EV_MINPRI == EV_MAXPRI
1329# define ABSPRI(w) (((W)w), 0)
1330#else
1331# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1332#endif
1333
1334#define EMPTY /* required for microsofts broken pseudo-c compiler */
1335#define EMPTY2(a,b) /* used to suppress some warnings */
1336
1337typedef ev_watcher *W;
1338typedef ev_watcher_list *WL;
1339typedef ev_watcher_time *WT;
1340
1341#define ev_active(w) ((W)(w))->active
1342#define ev_at(w) ((WT)(w))->at
1343
1344#if EV_USE_REALTIME
1345/* sig_atomic_t is used to avoid per-thread variables or locking but still */
1346/* giving it a reasonably high chance of working on typical architectures */
1347static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1348#endif
1349
1350#if EV_USE_MONOTONIC
1351static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1352#endif
1353
1354#ifndef EV_FD_TO_WIN32_HANDLE
1355# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1356#endif
1357#ifndef EV_WIN32_HANDLE_TO_FD
1358# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1359#endif
1360#ifndef EV_WIN32_CLOSE_FD
1361# define EV_WIN32_CLOSE_FD(fd) close (fd)
1362#endif
1363
1364#ifdef _WIN32
1365# include "ev_win32.c"
1366#endif
1367
1368/*****************************************************************************/
1369
1370/* define a suitable floor function (only used by periodics atm) */
1371
1372#if EV_USE_FLOOR
1373# include <math.h>
1374# define ev_floor(v) floor (v)
1375#else
1376
1377#include <float.h>
1378
1379/* a floor() replacement function, should be independent of ev_tstamp type */
1380static ev_tstamp noinline
1381ev_floor (ev_tstamp v)
1382{
1383 /* the choice of shift factor is not terribly important */
1384#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1385 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1386#else
1387 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1388#endif
1389
1390 /* argument too large for an unsigned long? */
1391 if (expect_false (v >= shift))
1392 {
1393 ev_tstamp f;
1394
1395 if (v == v - 1.)
1396 return v; /* very large number */
1397
1398 f = shift * ev_floor (v * (1. / shift));
1399 return f + ev_floor (v - f);
1400 }
1401
1402 /* special treatment for negative args? */
1403 if (expect_false (v < 0.))
1404 {
1405 ev_tstamp f = -ev_floor (-v);
1406
1407 return f - (f == v ? 0 : 1);
1408 }
1409
1410 /* fits into an unsigned long */
1411 return (unsigned long)v;
1412}
1413
1414#endif
1415
1416/*****************************************************************************/
1417
1418#ifdef __linux
1419# include <sys/utsname.h>
1420#endif
1421
1422static unsigned int noinline ecb_cold
1423ev_linux_version (void)
1424{
1425#ifdef __linux
1426 unsigned int v = 0;
1427 struct utsname buf;
1428 int i;
1429 char *p = buf.release;
1430
1431 if (uname (&buf))
1432 return 0;
1433
1434 for (i = 3+1; --i; )
1435 {
1436 unsigned int c = 0;
1437
1438 for (;;)
1439 {
1440 if (*p >= '0' && *p <= '9')
1441 c = c * 10 + *p++ - '0';
1442 else
1443 {
1444 p += *p == '.';
1445 break;
1446 }
1447 }
1448
1449 v = (v << 8) | c;
1450 }
1451
1452 return v;
1453#else
1454 return 0;
1455#endif
1456}
1457
1458/*****************************************************************************/
1459
1460#if EV_AVOID_STDIO
1461static void noinline ecb_cold
1462ev_printerr (const char *msg)
1463{
1464 write (STDERR_FILENO, msg, strlen (msg));
1465}
1466#endif
1467
1468static void (*syserr_cb)(const char *msg) EV_THROW;
1469
1470void ecb_cold
1471ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
1472{
1473 syserr_cb = cb;
1474}
1475
1476static void noinline ecb_cold
1477ev_syserr (const char *msg)
1478{
1479 if (!msg)
1480 msg = "(libev) system error";
1481
1482 if (syserr_cb)
1483 syserr_cb (msg);
1484 else
1485 {
1486#if EV_AVOID_STDIO
1487 ev_printerr (msg);
1488 ev_printerr (": ");
1489 ev_printerr (strerror (errno));
1490 ev_printerr ("\n");
1491#else
1492 perror (msg);
1493#endif
1494 abort ();
1495 }
1496}
1497
1498static void *
1499ev_realloc_emul (void *ptr, long size) EV_THROW
1500{
1501 /* some systems, notably openbsd and darwin, fail to properly
1502 * implement realloc (x, 0) (as required by both ansi c-89 and
1503 * the single unix specification, so work around them here.
1504 * recently, also (at least) fedora and debian started breaking it,
1505 * despite documenting it otherwise.
1506 */
1507
1508 if (size)
1509 return realloc (ptr, size);
1510
1511 free (ptr);
1512 return 0;
1513}
1514
1515static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
1516
1517void ecb_cold
1518ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
1519{
1520 alloc = cb;
1521}
1522
1523inline_speed void *
1524ev_realloc (void *ptr, long size)
1525{
1526 ptr = alloc (ptr, size);
1527
1528 if (!ptr && size)
1529 {
1530#if EV_AVOID_STDIO
1531 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1532#else
1533 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1534#endif
1535 abort ();
1536 }
1537
1538 return ptr;
1539}
1540
1541#define ev_malloc(size) ev_realloc (0, (size))
1542#define ev_free(ptr) ev_realloc ((ptr), 0)
1543
1544/*****************************************************************************/
1545
1546/* set in reify when reification needed */
1547#define EV_ANFD_REIFY 1
1548
1549/* file descriptor info structure */
124typedef struct 1550typedef struct
125{ 1551{
126 struct ev_watcher_list *head; 1552 WL head;
127 unsigned char events; 1553 unsigned char events; /* the events watched for */
1554 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1555 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
128 unsigned char reify; 1556 unsigned char unused;
1557#if EV_USE_EPOLL
1558 unsigned int egen; /* generation counter to counter epoll bugs */
1559#endif
1560#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1561 SOCKET handle;
1562#endif
1563#if EV_USE_IOCP
1564 OVERLAPPED or, ow;
1565#endif
129} ANFD; 1566} ANFD;
130 1567
1568/* stores the pending event set for a given watcher */
131typedef struct 1569typedef struct
132{ 1570{
133 W w; 1571 W w;
134 int events; 1572 int events; /* the pending event set for the given watcher */
135} ANPENDING; 1573} ANPENDING;
136 1574
1575#if EV_USE_INOTIFY
1576/* hash table entry per inotify-id */
1577typedef struct
1578{
1579 WL head;
1580} ANFS;
1581#endif
1582
1583/* Heap Entry */
1584#if EV_HEAP_CACHE_AT
1585 /* a heap element */
1586 typedef struct {
1587 ev_tstamp at;
1588 WT w;
1589 } ANHE;
1590
1591 #define ANHE_w(he) (he).w /* access watcher, read-write */
1592 #define ANHE_at(he) (he).at /* access cached at, read-only */
1593 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1594#else
1595 /* a heap element */
1596 typedef WT ANHE;
1597
1598 #define ANHE_w(he) (he)
1599 #define ANHE_at(he) (he)->at
1600 #define ANHE_at_cache(he)
1601#endif
1602
137#if EV_MULTIPLICITY 1603#if EV_MULTIPLICITY
138 1604
139struct ev_loop 1605 struct ev_loop
140{ 1606 {
1607 ev_tstamp ev_rt_now;
1608 #define ev_rt_now ((loop)->ev_rt_now)
141# define VAR(name,decl) decl; 1609 #define VAR(name,decl) decl;
142# include "ev_vars.h" 1610 #include "ev_vars.h"
143};
144# undef VAR 1611 #undef VAR
1612 };
145# include "ev_wrap.h" 1613 #include "ev_wrap.h"
1614
1615 static struct ev_loop default_loop_struct;
1616 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
146 1617
147#else 1618#else
148 1619
1620 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
149# define VAR(name,decl) static decl; 1621 #define VAR(name,decl) static decl;
150# include "ev_vars.h" 1622 #include "ev_vars.h"
151# undef VAR 1623 #undef VAR
152 1624
1625 static int ev_default_loop_ptr;
1626
153#endif 1627#endif
1628
1629#if EV_FEATURE_API
1630# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1631# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1632# define EV_INVOKE_PENDING invoke_cb (EV_A)
1633#else
1634# define EV_RELEASE_CB (void)0
1635# define EV_ACQUIRE_CB (void)0
1636# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1637#endif
1638
1639#define EVBREAK_RECURSE 0x80
154 1640
155/*****************************************************************************/ 1641/*****************************************************************************/
156 1642
157inline ev_tstamp 1643#ifndef EV_HAVE_EV_TIME
1644ev_tstamp
158ev_time (void) 1645ev_time (void) EV_THROW
159{ 1646{
160#if EV_USE_REALTIME 1647#if EV_USE_REALTIME
1648 if (expect_true (have_realtime))
1649 {
161 struct timespec ts; 1650 struct timespec ts;
162 clock_gettime (CLOCK_REALTIME, &ts); 1651 clock_gettime (CLOCK_REALTIME, &ts);
163 return ts.tv_sec + ts.tv_nsec * 1e-9; 1652 return ts.tv_sec + ts.tv_nsec * 1e-9;
164#else 1653 }
1654#endif
1655
165 struct timeval tv; 1656 struct timeval tv;
166 gettimeofday (&tv, 0); 1657 gettimeofday (&tv, 0);
167 return tv.tv_sec + tv.tv_usec * 1e-6; 1658 return tv.tv_sec + tv.tv_usec * 1e-6;
168#endif
169} 1659}
1660#endif
170 1661
171inline ev_tstamp 1662inline_size ev_tstamp
172get_clock (void) 1663get_clock (void)
173{ 1664{
174#if EV_USE_MONOTONIC 1665#if EV_USE_MONOTONIC
175 if (expect_true (have_monotonic)) 1666 if (expect_true (have_monotonic))
176 { 1667 {
… …
181#endif 1672#endif
182 1673
183 return ev_time (); 1674 return ev_time ();
184} 1675}
185 1676
1677#if EV_MULTIPLICITY
186ev_tstamp 1678ev_tstamp
187ev_now (EV_P) 1679ev_now (EV_P) EV_THROW
188{ 1680{
189 return rt_now; 1681 return ev_rt_now;
190} 1682}
1683#endif
191 1684
192#define array_roundsize(base,n) ((n) | 4 & ~3) 1685void
193 1686ev_sleep (ev_tstamp delay) EV_THROW
194#define array_needsize(base,cur,cnt,init) \ 1687{
195 if (expect_false ((cnt) > cur)) \ 1688 if (delay > 0.)
196 { \
197 int newcnt = cur; \
198 do \
199 { \
200 newcnt = array_roundsize (base, newcnt << 1); \
201 } \
202 while ((cnt) > newcnt); \
203 \
204 base = realloc (base, sizeof (*base) * (newcnt)); \
205 init (base + cur, newcnt - cur); \
206 cur = newcnt; \
207 } 1689 {
1690#if EV_USE_NANOSLEEP
1691 struct timespec ts;
1692
1693 EV_TS_SET (ts, delay);
1694 nanosleep (&ts, 0);
1695#elif defined _WIN32
1696 Sleep ((unsigned long)(delay * 1e3));
1697#else
1698 struct timeval tv;
1699
1700 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1701 /* something not guaranteed by newer posix versions, but guaranteed */
1702 /* by older ones */
1703 EV_TV_SET (tv, delay);
1704 select (0, 0, 0, 0, &tv);
1705#endif
1706 }
1707}
208 1708
209/*****************************************************************************/ 1709/*****************************************************************************/
210 1710
211static void 1711#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
212anfds_init (ANFD *base, int count)
213{
214 while (count--)
215 {
216 base->head = 0;
217 base->events = EV_NONE;
218 base->reify = 0;
219 1712
220 ++base; 1713/* find a suitable new size for the given array, */
1714/* hopefully by rounding to a nice-to-malloc size */
1715inline_size int
1716array_nextsize (int elem, int cur, int cnt)
1717{
1718 int ncur = cur + 1;
1719
1720 do
1721 ncur <<= 1;
1722 while (cnt > ncur);
1723
1724 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
1725 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
221 } 1726 {
222} 1727 ncur *= elem;
223 1728 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
224static void 1729 ncur = ncur - sizeof (void *) * 4;
225event (EV_P_ W w, int events) 1730 ncur /= elem;
226{
227 if (w->pending)
228 { 1731 }
1732
1733 return ncur;
1734}
1735
1736static void * noinline ecb_cold
1737array_realloc (int elem, void *base, int *cur, int cnt)
1738{
1739 *cur = array_nextsize (elem, *cur, cnt);
1740 return ev_realloc (base, elem * *cur);
1741}
1742
1743#define array_init_zero(base,count) \
1744 memset ((void *)(base), 0, sizeof (*(base)) * (count))
1745
1746#define array_needsize(type,base,cur,cnt,init) \
1747 if (expect_false ((cnt) > (cur))) \
1748 { \
1749 int ecb_unused ocur_ = (cur); \
1750 (base) = (type *)array_realloc \
1751 (sizeof (type), (base), &(cur), (cnt)); \
1752 init ((base) + (ocur_), (cur) - ocur_); \
1753 }
1754
1755#if 0
1756#define array_slim(type,stem) \
1757 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
1758 { \
1759 stem ## max = array_roundsize (stem ## cnt >> 1); \
1760 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
1761 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
1762 }
1763#endif
1764
1765#define array_free(stem, idx) \
1766 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
1767
1768/*****************************************************************************/
1769
1770/* dummy callback for pending events */
1771static void noinline
1772pendingcb (EV_P_ ev_prepare *w, int revents)
1773{
1774}
1775
1776void noinline
1777ev_feed_event (EV_P_ void *w, int revents) EV_THROW
1778{
1779 W w_ = (W)w;
1780 int pri = ABSPRI (w_);
1781
1782 if (expect_false (w_->pending))
1783 pendings [pri][w_->pending - 1].events |= revents;
1784 else
1785 {
1786 w_->pending = ++pendingcnt [pri];
1787 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1788 pendings [pri][w_->pending - 1].w = w_;
229 pendings [ABSPRI (w)][w->pending - 1].events |= events; 1789 pendings [pri][w_->pending - 1].events = revents;
230 return;
231 } 1790 }
232 1791
233 w->pending = ++pendingcnt [ABSPRI (w)]; 1792 pendingpri = NUMPRI - 1;
234 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
235 pendings [ABSPRI (w)][w->pending - 1].w = w;
236 pendings [ABSPRI (w)][w->pending - 1].events = events;
237} 1793}
238 1794
239static void 1795inline_speed void
1796feed_reverse (EV_P_ W w)
1797{
1798 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1799 rfeeds [rfeedcnt++] = w;
1800}
1801
1802inline_size void
1803feed_reverse_done (EV_P_ int revents)
1804{
1805 do
1806 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1807 while (rfeedcnt);
1808}
1809
1810inline_speed void
240queue_events (EV_P_ W *events, int eventcnt, int type) 1811queue_events (EV_P_ W *events, int eventcnt, int type)
241{ 1812{
242 int i; 1813 int i;
243 1814
244 for (i = 0; i < eventcnt; ++i) 1815 for (i = 0; i < eventcnt; ++i)
245 event (EV_A_ events [i], type); 1816 ev_feed_event (EV_A_ events [i], type);
246} 1817}
247 1818
248static void 1819/*****************************************************************************/
1820
1821inline_speed void
249fd_event (EV_P_ int fd, int events) 1822fd_event_nocheck (EV_P_ int fd, int revents)
250{ 1823{
251 ANFD *anfd = anfds + fd; 1824 ANFD *anfd = anfds + fd;
252 struct ev_io *w; 1825 ev_io *w;
253 1826
254 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next) 1827 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
255 { 1828 {
256 int ev = w->events & events; 1829 int ev = w->events & revents;
257 1830
258 if (ev) 1831 if (ev)
259 event (EV_A_ (W)w, ev); 1832 ev_feed_event (EV_A_ (W)w, ev);
260 } 1833 }
261} 1834}
262 1835
263/*****************************************************************************/ 1836/* do not submit kernel events for fds that have reify set */
1837/* because that means they changed while we were polling for new events */
1838inline_speed void
1839fd_event (EV_P_ int fd, int revents)
1840{
1841 ANFD *anfd = anfds + fd;
264 1842
265static void 1843 if (expect_true (!anfd->reify))
1844 fd_event_nocheck (EV_A_ fd, revents);
1845}
1846
1847void
1848ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
1849{
1850 if (fd >= 0 && fd < anfdmax)
1851 fd_event_nocheck (EV_A_ fd, revents);
1852}
1853
1854/* make sure the external fd watch events are in-sync */
1855/* with the kernel/libev internal state */
1856inline_size void
266fd_reify (EV_P) 1857fd_reify (EV_P)
267{ 1858{
268 int i; 1859 int i;
269 1860
1861#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
270 for (i = 0; i < fdchangecnt; ++i) 1862 for (i = 0; i < fdchangecnt; ++i)
271 { 1863 {
272 int fd = fdchanges [i]; 1864 int fd = fdchanges [i];
273 ANFD *anfd = anfds + fd; 1865 ANFD *anfd = anfds + fd;
274 struct ev_io *w;
275 1866
276 int events = 0; 1867 if (anfd->reify & EV__IOFDSET && anfd->head)
277
278 for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
279 events |= w->events;
280
281 anfd->reify = 0;
282
283 if (anfd->events != events)
284 { 1868 {
1869 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1870
1871 if (handle != anfd->handle)
1872 {
1873 unsigned long arg;
1874
1875 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1876
1877 /* handle changed, but fd didn't - we need to do it in two steps */
285 method_modify (EV_A_ fd, anfd->events, events); 1878 backend_modify (EV_A_ fd, anfd->events, 0);
286 anfd->events = events; 1879 anfd->events = 0;
1880 anfd->handle = handle;
1881 }
287 } 1882 }
288 } 1883 }
1884#endif
1885
1886 for (i = 0; i < fdchangecnt; ++i)
1887 {
1888 int fd = fdchanges [i];
1889 ANFD *anfd = anfds + fd;
1890 ev_io *w;
1891
1892 unsigned char o_events = anfd->events;
1893 unsigned char o_reify = anfd->reify;
1894
1895 anfd->reify = 0;
1896
1897 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1898 {
1899 anfd->events = 0;
1900
1901 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1902 anfd->events |= (unsigned char)w->events;
1903
1904 if (o_events != anfd->events)
1905 o_reify = EV__IOFDSET; /* actually |= */
1906 }
1907
1908 if (o_reify & EV__IOFDSET)
1909 backend_modify (EV_A_ fd, o_events, anfd->events);
1910 }
289 1911
290 fdchangecnt = 0; 1912 fdchangecnt = 0;
291} 1913}
292 1914
293static void 1915/* something about the given fd changed */
1916inline_size void
294fd_change (EV_P_ int fd) 1917fd_change (EV_P_ int fd, int flags)
295{ 1918{
296 if (anfds [fd].reify || fdchangecnt < 0) 1919 unsigned char reify = anfds [fd].reify;
297 return;
298
299 anfds [fd].reify = 1; 1920 anfds [fd].reify |= flags;
300 1921
1922 if (expect_true (!reify))
1923 {
301 ++fdchangecnt; 1924 ++fdchangecnt;
302 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1925 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
303 fdchanges [fdchangecnt - 1] = fd; 1926 fdchanges [fdchangecnt - 1] = fd;
1927 }
304} 1928}
305 1929
306static void 1930/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1931inline_speed void ecb_cold
307fd_kill (EV_P_ int fd) 1932fd_kill (EV_P_ int fd)
308{ 1933{
309 struct ev_io *w; 1934 ev_io *w;
310 1935
311 while ((w = (struct ev_io *)anfds [fd].head)) 1936 while ((w = (ev_io *)anfds [fd].head))
312 { 1937 {
313 ev_io_stop (EV_A_ w); 1938 ev_io_stop (EV_A_ w);
314 event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 1939 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
315 } 1940 }
1941}
1942
1943/* check whether the given fd is actually valid, for error recovery */
1944inline_size int ecb_cold
1945fd_valid (int fd)
1946{
1947#ifdef _WIN32
1948 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1949#else
1950 return fcntl (fd, F_GETFD) != -1;
1951#endif
316} 1952}
317 1953
318/* called on EBADF to verify fds */ 1954/* called on EBADF to verify fds */
319static void 1955static void noinline ecb_cold
320fd_ebadf (EV_P) 1956fd_ebadf (EV_P)
321{ 1957{
322 int fd; 1958 int fd;
323 1959
324 for (fd = 0; fd < anfdmax; ++fd) 1960 for (fd = 0; fd < anfdmax; ++fd)
325 if (anfds [fd].events) 1961 if (anfds [fd].events)
326 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 1962 if (!fd_valid (fd) && errno == EBADF)
327 fd_kill (EV_A_ fd); 1963 fd_kill (EV_A_ fd);
328} 1964}
329 1965
330/* called on ENOMEM in select/poll to kill some fds and retry */ 1966/* called on ENOMEM in select/poll to kill some fds and retry */
331static void 1967static void noinline ecb_cold
332fd_enomem (EV_P) 1968fd_enomem (EV_P)
333{ 1969{
334 int fd = anfdmax; 1970 int fd;
335 1971
336 while (fd--) 1972 for (fd = anfdmax; fd--; )
337 if (anfds [fd].events) 1973 if (anfds [fd].events)
338 { 1974 {
339 close (fd);
340 fd_kill (EV_A_ fd); 1975 fd_kill (EV_A_ fd);
341 return; 1976 break;
342 } 1977 }
343} 1978}
344 1979
345/* susually called after fork if method needs to re-arm all fds from scratch */ 1980/* usually called after fork if backend needs to re-arm all fds from scratch */
346static void 1981static void noinline
347fd_rearm_all (EV_P) 1982fd_rearm_all (EV_P)
348{ 1983{
349 int fd; 1984 int fd;
350 1985
351 /* this should be highly optimised to not do anything but set a flag */
352 for (fd = 0; fd < anfdmax; ++fd) 1986 for (fd = 0; fd < anfdmax; ++fd)
353 if (anfds [fd].events) 1987 if (anfds [fd].events)
354 { 1988 {
355 anfds [fd].events = 0; 1989 anfds [fd].events = 0;
356 fd_change (fd); 1990 anfds [fd].emask = 0;
1991 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
357 } 1992 }
358} 1993}
359 1994
1995/* used to prepare libev internal fd's */
1996/* this is not fork-safe */
1997inline_speed void
1998fd_intern (int fd)
1999{
2000#ifdef _WIN32
2001 unsigned long arg = 1;
2002 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
2003#else
2004 fcntl (fd, F_SETFD, FD_CLOEXEC);
2005 fcntl (fd, F_SETFL, O_NONBLOCK);
2006#endif
2007}
2008
360/*****************************************************************************/ 2009/*****************************************************************************/
361 2010
2011/*
2012 * the heap functions want a real array index. array index 0 is guaranteed to not
2013 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
2014 * the branching factor of the d-tree.
2015 */
2016
2017/*
2018 * at the moment we allow libev the luxury of two heaps,
2019 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
2020 * which is more cache-efficient.
2021 * the difference is about 5% with 50000+ watchers.
2022 */
2023#if EV_USE_4HEAP
2024
2025#define DHEAP 4
2026#define HEAP0 (DHEAP - 1) /* index of first element in heap */
2027#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
2028#define UPHEAP_DONE(p,k) ((p) == (k))
2029
2030/* away from the root */
2031inline_speed void
2032downheap (ANHE *heap, int N, int k)
2033{
2034 ANHE he = heap [k];
2035 ANHE *E = heap + N + HEAP0;
2036
2037 for (;;)
2038 {
2039 ev_tstamp minat;
2040 ANHE *minpos;
2041 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
2042
2043 /* find minimum child */
2044 if (expect_true (pos + DHEAP - 1 < E))
2045 {
2046 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2047 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2048 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2049 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2050 }
2051 else if (pos < E)
2052 {
2053 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2054 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2055 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2056 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2057 }
2058 else
2059 break;
2060
2061 if (ANHE_at (he) <= minat)
2062 break;
2063
2064 heap [k] = *minpos;
2065 ev_active (ANHE_w (*minpos)) = k;
2066
2067 k = minpos - heap;
2068 }
2069
2070 heap [k] = he;
2071 ev_active (ANHE_w (he)) = k;
2072}
2073
2074#else /* 4HEAP */
2075
2076#define HEAP0 1
2077#define HPARENT(k) ((k) >> 1)
2078#define UPHEAP_DONE(p,k) (!(p))
2079
2080/* away from the root */
2081inline_speed void
2082downheap (ANHE *heap, int N, int k)
2083{
2084 ANHE he = heap [k];
2085
2086 for (;;)
2087 {
2088 int c = k << 1;
2089
2090 if (c >= N + HEAP0)
2091 break;
2092
2093 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
2094 ? 1 : 0;
2095
2096 if (ANHE_at (he) <= ANHE_at (heap [c]))
2097 break;
2098
2099 heap [k] = heap [c];
2100 ev_active (ANHE_w (heap [k])) = k;
2101
2102 k = c;
2103 }
2104
2105 heap [k] = he;
2106 ev_active (ANHE_w (he)) = k;
2107}
2108#endif
2109
2110/* towards the root */
2111inline_speed void
2112upheap (ANHE *heap, int k)
2113{
2114 ANHE he = heap [k];
2115
2116 for (;;)
2117 {
2118 int p = HPARENT (k);
2119
2120 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
2121 break;
2122
2123 heap [k] = heap [p];
2124 ev_active (ANHE_w (heap [k])) = k;
2125 k = p;
2126 }
2127
2128 heap [k] = he;
2129 ev_active (ANHE_w (he)) = k;
2130}
2131
2132/* move an element suitably so it is in a correct place */
2133inline_size void
2134adjustheap (ANHE *heap, int N, int k)
2135{
2136 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
2137 upheap (heap, k);
2138 else
2139 downheap (heap, N, k);
2140}
2141
2142/* rebuild the heap: this function is used only once and executed rarely */
2143inline_size void
2144reheap (ANHE *heap, int N)
2145{
2146 int i;
2147
2148 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
2149 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
2150 for (i = 0; i < N; ++i)
2151 upheap (heap, i + HEAP0);
2152}
2153
2154/*****************************************************************************/
2155
2156/* associate signal watchers to a signal signal */
2157typedef struct
2158{
2159 EV_ATOMIC_T pending;
2160#if EV_MULTIPLICITY
2161 EV_P;
2162#endif
2163 WL head;
2164} ANSIG;
2165
2166static ANSIG signals [EV_NSIG - 1];
2167
2168/*****************************************************************************/
2169
2170#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2171
2172static void noinline ecb_cold
2173evpipe_init (EV_P)
2174{
2175 if (!ev_is_active (&pipe_w))
2176 {
2177 int fds [2];
2178
2179# if EV_USE_EVENTFD
2180 fds [0] = -1;
2181 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2182 if (fds [1] < 0 && errno == EINVAL)
2183 fds [1] = eventfd (0, 0);
2184
2185 if (fds [1] < 0)
2186# endif
2187 {
2188 while (pipe (fds))
2189 ev_syserr ("(libev) error creating signal/async pipe");
2190
2191 fd_intern (fds [0]);
2192 }
2193
2194 evpipe [0] = fds [0];
2195
2196 if (evpipe [1] < 0)
2197 evpipe [1] = fds [1]; /* first call, set write fd */
2198 else
2199 {
2200 /* on subsequent calls, do not change evpipe [1] */
2201 /* so that evpipe_write can always rely on its value. */
2202 /* this branch does not do anything sensible on windows, */
2203 /* so must not be executed on windows */
2204
2205 dup2 (fds [1], evpipe [1]);
2206 close (fds [1]);
2207 }
2208
2209 fd_intern (evpipe [1]);
2210
2211 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2212 ev_io_start (EV_A_ &pipe_w);
2213 ev_unref (EV_A); /* watcher should not keep loop alive */
2214 }
2215}
2216
2217inline_speed void
2218evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2219{
2220 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2221
2222 if (expect_true (*flag))
2223 return;
2224
2225 *flag = 1;
2226 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2227
2228 pipe_write_skipped = 1;
2229
2230 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2231
2232 if (pipe_write_wanted)
2233 {
2234 int old_errno;
2235
2236 pipe_write_skipped = 0;
2237 ECB_MEMORY_FENCE_RELEASE;
2238
2239 old_errno = errno; /* save errno because write will clobber it */
2240
2241#if EV_USE_EVENTFD
2242 if (evpipe [0] < 0)
2243 {
2244 uint64_t counter = 1;
2245 write (evpipe [1], &counter, sizeof (uint64_t));
2246 }
2247 else
2248#endif
2249 {
2250#ifdef _WIN32
2251 WSABUF buf;
2252 DWORD sent;
2253 buf.buf = &buf;
2254 buf.len = 1;
2255 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2256#else
2257 write (evpipe [1], &(evpipe [1]), 1);
2258#endif
2259 }
2260
2261 errno = old_errno;
2262 }
2263}
2264
2265/* called whenever the libev signal pipe */
2266/* got some events (signal, async) */
362static void 2267static void
363upheap (WT *heap, int k) 2268pipecb (EV_P_ ev_io *iow, int revents)
364{ 2269{
365 WT w = heap [k]; 2270 int i;
366 2271
367 while (k && heap [k >> 1]->at > w->at) 2272 if (revents & EV_READ)
368 {
369 heap [k] = heap [k >> 1];
370 heap [k]->active = k + 1;
371 k >>= 1;
372 } 2273 {
2274#if EV_USE_EVENTFD
2275 if (evpipe [0] < 0)
2276 {
2277 uint64_t counter;
2278 read (evpipe [1], &counter, sizeof (uint64_t));
2279 }
2280 else
2281#endif
2282 {
2283 char dummy[4];
2284#ifdef _WIN32
2285 WSABUF buf;
2286 DWORD recvd;
2287 DWORD flags = 0;
2288 buf.buf = dummy;
2289 buf.len = sizeof (dummy);
2290 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2291#else
2292 read (evpipe [0], &dummy, sizeof (dummy));
2293#endif
2294 }
2295 }
373 2296
374 heap [k] = w; 2297 pipe_write_skipped = 0;
375 heap [k]->active = k + 1;
376 2298
2299 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2300
2301#if EV_SIGNAL_ENABLE
2302 if (sig_pending)
2303 {
2304 sig_pending = 0;
2305
2306 ECB_MEMORY_FENCE;
2307
2308 for (i = EV_NSIG - 1; i--; )
2309 if (expect_false (signals [i].pending))
2310 ev_feed_signal_event (EV_A_ i + 1);
2311 }
2312#endif
2313
2314#if EV_ASYNC_ENABLE
2315 if (async_pending)
2316 {
2317 async_pending = 0;
2318
2319 ECB_MEMORY_FENCE;
2320
2321 for (i = asynccnt; i--; )
2322 if (asyncs [i]->sent)
2323 {
2324 asyncs [i]->sent = 0;
2325 ECB_MEMORY_FENCE_RELEASE;
2326 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
2327 }
2328 }
2329#endif
2330}
2331
2332/*****************************************************************************/
2333
2334void
2335ev_feed_signal (int signum) EV_THROW
2336{
2337#if EV_MULTIPLICITY
2338 EV_P;
2339 ECB_MEMORY_FENCE_ACQUIRE;
2340 EV_A = signals [signum - 1].loop;
2341
2342 if (!EV_A)
2343 return;
2344#endif
2345
2346 signals [signum - 1].pending = 1;
2347 evpipe_write (EV_A_ &sig_pending);
377} 2348}
378 2349
379static void 2350static void
380downheap (WT *heap, int N, int k) 2351ev_sighandler (int signum)
381{ 2352{
382 WT w = heap [k]; 2353#ifdef _WIN32
2354 signal (signum, ev_sighandler);
2355#endif
383 2356
384 while (k < (N >> 1)) 2357 ev_feed_signal (signum);
385 { 2358}
386 int j = k << 1;
387 2359
388 if (j + 1 < N && heap [j]->at > heap [j + 1]->at) 2360void noinline
389 ++j; 2361ev_feed_signal_event (EV_P_ int signum) EV_THROW
2362{
2363 WL w;
390 2364
391 if (w->at <= heap [j]->at) 2365 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2366 return;
2367
2368 --signum;
2369
2370#if EV_MULTIPLICITY
2371 /* it is permissible to try to feed a signal to the wrong loop */
2372 /* or, likely more useful, feeding a signal nobody is waiting for */
2373
2374 if (expect_false (signals [signum].loop != EV_A))
2375 return;
2376#endif
2377
2378 signals [signum].pending = 0;
2379 ECB_MEMORY_FENCE_RELEASE;
2380
2381 for (w = signals [signum].head; w; w = w->next)
2382 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2383}
2384
2385#if EV_USE_SIGNALFD
2386static void
2387sigfdcb (EV_P_ ev_io *iow, int revents)
2388{
2389 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2390
2391 for (;;)
2392 {
2393 ssize_t res = read (sigfd, si, sizeof (si));
2394
2395 /* not ISO-C, as res might be -1, but works with SuS */
2396 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2397 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2398
2399 if (res < (ssize_t)sizeof (si))
392 break; 2400 break;
393
394 heap [k] = heap [j];
395 heap [k]->active = k + 1;
396 k = j;
397 } 2401 }
398
399 heap [k] = w;
400 heap [k]->active = k + 1;
401} 2402}
2403#endif
2404
2405#endif
402 2406
403/*****************************************************************************/ 2407/*****************************************************************************/
404 2408
405typedef struct 2409#if EV_CHILD_ENABLE
406{ 2410static WL childs [EV_PID_HASHSIZE];
407 struct ev_watcher_list *head;
408 sig_atomic_t volatile gotsig;
409} ANSIG;
410 2411
411static ANSIG *signals; 2412static ev_signal childev;
412static int signalmax;
413 2413
414static int sigpipe [2]; 2414#ifndef WIFCONTINUED
415static sig_atomic_t volatile gotsig; 2415# define WIFCONTINUED(status) 0
2416#endif
416 2417
417static void 2418/* handle a single child status event */
418signals_init (ANSIG *base, int count) 2419inline_speed void
2420child_reap (EV_P_ int chain, int pid, int status)
419{ 2421{
420 while (count--) 2422 ev_child *w;
421 { 2423 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
422 base->head = 0;
423 base->gotsig = 0;
424 2424
425 ++base; 2425 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
426 } 2426 {
427} 2427 if ((w->pid == pid || !w->pid)
428 2428 && (!traced || (w->flags & 1)))
429static void
430sighandler (int signum)
431{
432 signals [signum - 1].gotsig = 1;
433
434 if (!gotsig)
435 {
436 int old_errno = errno;
437 gotsig = 1;
438 write (sigpipe [1], &signum, 1);
439 errno = old_errno;
440 }
441}
442
443static void
444sigcb (EV_P_ struct ev_io *iow, int revents)
445{
446 struct ev_watcher_list *w;
447 int signum;
448
449 read (sigpipe [0], &revents, 1);
450 gotsig = 0;
451
452 for (signum = signalmax; signum--; )
453 if (signals [signum].gotsig)
454 { 2429 {
455 signals [signum].gotsig = 0; 2430 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
456 2431 w->rpid = pid;
457 for (w = signals [signum].head; w; w = w->next) 2432 w->rstatus = status;
458 event (EV_A_ (W)w, EV_SIGNAL); 2433 ev_feed_event (EV_A_ (W)w, EV_CHILD);
459 } 2434 }
2435 }
460} 2436}
461
462static void
463siginit (EV_P)
464{
465#ifndef WIN32
466 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
467 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
468
469 /* rather than sort out wether we really need nb, set it */
470 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
471 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
472#endif
473
474 ev_io_set (&sigev, sigpipe [0], EV_READ);
475 ev_io_start (EV_A_ &sigev);
476 ev_unref (EV_A); /* child watcher should not keep loop alive */
477}
478
479/*****************************************************************************/
480
481#ifndef WIN32
482 2437
483#ifndef WCONTINUED 2438#ifndef WCONTINUED
484# define WCONTINUED 0 2439# define WCONTINUED 0
485#endif 2440#endif
486 2441
2442/* called on sigchld etc., calls waitpid */
487static void 2443static void
488child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
489{
490 struct ev_child *w;
491
492 for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
493 if (w->pid == pid || !w->pid)
494 {
495 w->priority = sw->priority; /* need to do it *now* */
496 w->rpid = pid;
497 w->rstatus = status;
498 event (EV_A_ (W)w, EV_CHILD);
499 }
500}
501
502static void
503childcb (EV_P_ struct ev_signal *sw, int revents) 2444childcb (EV_P_ ev_signal *sw, int revents)
504{ 2445{
505 int pid, status; 2446 int pid, status;
506 2447
2448 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
507 if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED))) 2449 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
508 { 2450 if (!WCONTINUED
2451 || errno != EINVAL
2452 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
2453 return;
2454
509 /* make sure we are called again until all childs have been reaped */ 2455 /* make sure we are called again until all children have been reaped */
2456 /* we need to do it this way so that the callback gets called before we continue */
510 event (EV_A_ (W)sw, EV_SIGNAL); 2457 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
511 2458
512 child_reap (EV_A_ sw, pid, pid, status); 2459 child_reap (EV_A_ pid, pid, status);
2460 if ((EV_PID_HASHSIZE) > 1)
513 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */ 2461 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
514 }
515} 2462}
516 2463
517#endif 2464#endif
518 2465
519/*****************************************************************************/ 2466/*****************************************************************************/
520 2467
2468#if EV_USE_IOCP
2469# include "ev_iocp.c"
2470#endif
2471#if EV_USE_PORT
2472# include "ev_port.c"
2473#endif
521#if EV_USE_KQUEUE 2474#if EV_USE_KQUEUE
522# include "ev_kqueue.c" 2475# include "ev_kqueue.c"
523#endif 2476#endif
524#if EV_USE_EPOLL 2477#if EV_USE_EPOLL
525# include "ev_epoll.c" 2478# include "ev_epoll.c"
526#endif 2479#endif
527#if EV_USEV_POLL 2480#if EV_USE_POLL
528# include "ev_poll.c" 2481# include "ev_poll.c"
529#endif 2482#endif
530#if EV_USE_SELECT 2483#if EV_USE_SELECT
531# include "ev_select.c" 2484# include "ev_select.c"
532#endif 2485#endif
533 2486
534int 2487int ecb_cold
535ev_version_major (void) 2488ev_version_major (void) EV_THROW
536{ 2489{
537 return EV_VERSION_MAJOR; 2490 return EV_VERSION_MAJOR;
538} 2491}
539 2492
540int 2493int ecb_cold
541ev_version_minor (void) 2494ev_version_minor (void) EV_THROW
542{ 2495{
543 return EV_VERSION_MINOR; 2496 return EV_VERSION_MINOR;
544} 2497}
545 2498
546/* return true if we are running with elevated privileges and should ignore env variables */ 2499/* return true if we are running with elevated privileges and should ignore env variables */
547static int 2500int inline_size ecb_cold
548enable_secure (void) 2501enable_secure (void)
549{ 2502{
550#ifdef WIN32 2503#ifdef _WIN32
551 return 0; 2504 return 0;
552#else 2505#else
553 return getuid () != geteuid () 2506 return getuid () != geteuid ()
554 || getgid () != getegid (); 2507 || getgid () != getegid ();
555#endif 2508#endif
556} 2509}
557 2510
2511unsigned int ecb_cold
2512ev_supported_backends (void) EV_THROW
2513{
2514 unsigned int flags = 0;
2515
2516 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2517 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
2518 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2519 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2520 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2521
2522 return flags;
2523}
2524
2525unsigned int ecb_cold
2526ev_recommended_backends (void) EV_THROW
2527{
2528 unsigned int flags = ev_supported_backends ();
2529
2530#ifndef __NetBSD__
2531 /* kqueue is borked on everything but netbsd apparently */
2532 /* it usually doesn't work correctly on anything but sockets and pipes */
2533 flags &= ~EVBACKEND_KQUEUE;
2534#endif
2535#ifdef __APPLE__
2536 /* only select works correctly on that "unix-certified" platform */
2537 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2538 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2539#endif
2540#ifdef __FreeBSD__
2541 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2542#endif
2543
2544 return flags;
2545}
2546
2547unsigned int ecb_cold
2548ev_embeddable_backends (void) EV_THROW
2549{
2550 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2551
2552 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2553 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2554 flags &= ~EVBACKEND_EPOLL;
2555
2556 return flags;
2557}
2558
2559unsigned int
2560ev_backend (EV_P) EV_THROW
2561{
2562 return backend;
2563}
2564
2565#if EV_FEATURE_API
2566unsigned int
2567ev_iteration (EV_P) EV_THROW
2568{
2569 return loop_count;
2570}
2571
2572unsigned int
2573ev_depth (EV_P) EV_THROW
2574{
2575 return loop_depth;
2576}
2577
2578void
2579ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2580{
2581 io_blocktime = interval;
2582}
2583
2584void
2585ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2586{
2587 timeout_blocktime = interval;
2588}
2589
2590void
2591ev_set_userdata (EV_P_ void *data) EV_THROW
2592{
2593 userdata = data;
2594}
2595
2596void *
2597ev_userdata (EV_P) EV_THROW
2598{
2599 return userdata;
2600}
2601
2602void
2603ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
2604{
2605 invoke_cb = invoke_pending_cb;
2606}
2607
2608void
2609ev_set_loop_release_cb (EV_P_ ev_loop_callback_nothrow release, ev_loop_callback_nothrow acquire) EV_THROW
2610{
2611 release_cb = release;
2612 acquire_cb = acquire;
2613}
2614#endif
2615
2616/* initialise a loop structure, must be zero-initialised */
2617static void noinline ecb_cold
2618loop_init (EV_P_ unsigned int flags) EV_THROW
2619{
2620 if (!backend)
2621 {
2622 origflags = flags;
2623
2624#if EV_USE_REALTIME
2625 if (!have_realtime)
2626 {
2627 struct timespec ts;
2628
2629 if (!clock_gettime (CLOCK_REALTIME, &ts))
2630 have_realtime = 1;
2631 }
2632#endif
2633
2634#if EV_USE_MONOTONIC
2635 if (!have_monotonic)
2636 {
2637 struct timespec ts;
2638
2639 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
2640 have_monotonic = 1;
2641 }
2642#endif
2643
2644 /* pid check not overridable via env */
2645#ifndef _WIN32
2646 if (flags & EVFLAG_FORKCHECK)
2647 curpid = getpid ();
2648#endif
2649
2650 if (!(flags & EVFLAG_NOENV)
2651 && !enable_secure ()
2652 && getenv ("LIBEV_FLAGS"))
2653 flags = atoi (getenv ("LIBEV_FLAGS"));
2654
2655 ev_rt_now = ev_time ();
2656 mn_now = get_clock ();
2657 now_floor = mn_now;
2658 rtmn_diff = ev_rt_now - mn_now;
2659#if EV_FEATURE_API
2660 invoke_cb = ev_invoke_pending;
2661#endif
2662
2663 io_blocktime = 0.;
2664 timeout_blocktime = 0.;
2665 backend = 0;
2666 backend_fd = -1;
2667 sig_pending = 0;
2668#if EV_ASYNC_ENABLE
2669 async_pending = 0;
2670#endif
2671 pipe_write_skipped = 0;
2672 pipe_write_wanted = 0;
2673 evpipe [0] = -1;
2674 evpipe [1] = -1;
2675#if EV_USE_INOTIFY
2676 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2677#endif
2678#if EV_USE_SIGNALFD
2679 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2680#endif
2681
2682 if (!(flags & EVBACKEND_MASK))
2683 flags |= ev_recommended_backends ();
2684
2685#if EV_USE_IOCP
2686 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2687#endif
2688#if EV_USE_PORT
2689 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
2690#endif
2691#if EV_USE_KQUEUE
2692 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
2693#endif
2694#if EV_USE_EPOLL
2695 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
2696#endif
2697#if EV_USE_POLL
2698 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
2699#endif
2700#if EV_USE_SELECT
2701 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
2702#endif
2703
2704 ev_prepare_init (&pending_w, pendingcb);
2705
2706#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2707 ev_init (&pipe_w, pipecb);
2708 ev_set_priority (&pipe_w, EV_MAXPRI);
2709#endif
2710 }
2711}
2712
2713/* free up a loop structure */
2714void ecb_cold
2715ev_loop_destroy (EV_P)
2716{
2717 int i;
2718
2719#if EV_MULTIPLICITY
2720 /* mimic free (0) */
2721 if (!EV_A)
2722 return;
2723#endif
2724
2725#if EV_CLEANUP_ENABLE
2726 /* queue cleanup watchers (and execute them) */
2727 if (expect_false (cleanupcnt))
2728 {
2729 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2730 EV_INVOKE_PENDING;
2731 }
2732#endif
2733
2734#if EV_CHILD_ENABLE
2735 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2736 {
2737 ev_ref (EV_A); /* child watcher */
2738 ev_signal_stop (EV_A_ &childev);
2739 }
2740#endif
2741
2742 if (ev_is_active (&pipe_w))
2743 {
2744 /*ev_ref (EV_A);*/
2745 /*ev_io_stop (EV_A_ &pipe_w);*/
2746
2747 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2748 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2749 }
2750
2751#if EV_USE_SIGNALFD
2752 if (ev_is_active (&sigfd_w))
2753 close (sigfd);
2754#endif
2755
2756#if EV_USE_INOTIFY
2757 if (fs_fd >= 0)
2758 close (fs_fd);
2759#endif
2760
2761 if (backend_fd >= 0)
2762 close (backend_fd);
2763
2764#if EV_USE_IOCP
2765 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2766#endif
2767#if EV_USE_PORT
2768 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
2769#endif
2770#if EV_USE_KQUEUE
2771 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
2772#endif
2773#if EV_USE_EPOLL
2774 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
2775#endif
2776#if EV_USE_POLL
2777 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
2778#endif
2779#if EV_USE_SELECT
2780 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
2781#endif
2782
2783 for (i = NUMPRI; i--; )
2784 {
2785 array_free (pending, [i]);
2786#if EV_IDLE_ENABLE
2787 array_free (idle, [i]);
2788#endif
2789 }
2790
2791 ev_free (anfds); anfds = 0; anfdmax = 0;
2792
2793 /* have to use the microsoft-never-gets-it-right macro */
2794 array_free (rfeed, EMPTY);
2795 array_free (fdchange, EMPTY);
2796 array_free (timer, EMPTY);
2797#if EV_PERIODIC_ENABLE
2798 array_free (periodic, EMPTY);
2799#endif
2800#if EV_FORK_ENABLE
2801 array_free (fork, EMPTY);
2802#endif
2803#if EV_CLEANUP_ENABLE
2804 array_free (cleanup, EMPTY);
2805#endif
2806 array_free (prepare, EMPTY);
2807 array_free (check, EMPTY);
2808#if EV_ASYNC_ENABLE
2809 array_free (async, EMPTY);
2810#endif
2811
2812 backend = 0;
2813
2814#if EV_MULTIPLICITY
2815 if (ev_is_default_loop (EV_A))
2816#endif
2817 ev_default_loop_ptr = 0;
2818#if EV_MULTIPLICITY
2819 else
2820 ev_free (EV_A);
2821#endif
2822}
2823
2824#if EV_USE_INOTIFY
2825inline_size void infy_fork (EV_P);
2826#endif
2827
2828inline_size void
2829loop_fork (EV_P)
2830{
2831#if EV_USE_PORT
2832 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2833#endif
2834#if EV_USE_KQUEUE
2835 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
2836#endif
2837#if EV_USE_EPOLL
2838 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
2839#endif
2840#if EV_USE_INOTIFY
2841 infy_fork (EV_A);
2842#endif
2843
2844#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2845 if (ev_is_active (&pipe_w))
2846 {
2847 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2848
2849 ev_ref (EV_A);
2850 ev_io_stop (EV_A_ &pipe_w);
2851
2852 if (evpipe [0] >= 0)
2853 EV_WIN32_CLOSE_FD (evpipe [0]);
2854
2855 evpipe_init (EV_A);
2856 /* iterate over everything, in case we missed something before */
2857 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2858 }
2859#endif
2860
2861 postfork = 0;
2862}
2863
2864#if EV_MULTIPLICITY
2865
2866struct ev_loop * ecb_cold
2867ev_loop_new (unsigned int flags) EV_THROW
2868{
2869 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2870
2871 memset (EV_A, 0, sizeof (struct ev_loop));
2872 loop_init (EV_A_ flags);
2873
2874 if (ev_backend (EV_A))
2875 return EV_A;
2876
2877 ev_free (EV_A);
2878 return 0;
2879}
2880
2881#endif /* multiplicity */
2882
2883#if EV_VERIFY
2884static void noinline ecb_cold
2885verify_watcher (EV_P_ W w)
2886{
2887 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2888
2889 if (w->pending)
2890 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2891}
2892
2893static void noinline ecb_cold
2894verify_heap (EV_P_ ANHE *heap, int N)
2895{
2896 int i;
2897
2898 for (i = HEAP0; i < N + HEAP0; ++i)
2899 {
2900 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2901 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2902 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2903
2904 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2905 }
2906}
2907
2908static void noinline ecb_cold
2909array_verify (EV_P_ W *ws, int cnt)
2910{
2911 while (cnt--)
2912 {
2913 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2914 verify_watcher (EV_A_ ws [cnt]);
2915 }
2916}
2917#endif
2918
2919#if EV_FEATURE_API
2920void ecb_cold
2921ev_verify (EV_P) EV_THROW
2922{
2923#if EV_VERIFY
2924 int i;
2925 WL w, w2;
2926
2927 assert (activecnt >= -1);
2928
2929 assert (fdchangemax >= fdchangecnt);
2930 for (i = 0; i < fdchangecnt; ++i)
2931 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2932
2933 assert (anfdmax >= 0);
2934 for (i = 0; i < anfdmax; ++i)
2935 {
2936 int j = 0;
2937
2938 for (w = w2 = anfds [i].head; w; w = w->next)
2939 {
2940 verify_watcher (EV_A_ (W)w);
2941
2942 if (j++ & 1)
2943 {
2944 assert (("libev: io watcher list contains a loop", w != w2));
2945 w2 = w2->next;
2946 }
2947
2948 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2949 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2950 }
2951 }
2952
2953 assert (timermax >= timercnt);
2954 verify_heap (EV_A_ timers, timercnt);
2955
2956#if EV_PERIODIC_ENABLE
2957 assert (periodicmax >= periodiccnt);
2958 verify_heap (EV_A_ periodics, periodiccnt);
2959#endif
2960
2961 for (i = NUMPRI; i--; )
2962 {
2963 assert (pendingmax [i] >= pendingcnt [i]);
2964#if EV_IDLE_ENABLE
2965 assert (idleall >= 0);
2966 assert (idlemax [i] >= idlecnt [i]);
2967 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2968#endif
2969 }
2970
2971#if EV_FORK_ENABLE
2972 assert (forkmax >= forkcnt);
2973 array_verify (EV_A_ (W *)forks, forkcnt);
2974#endif
2975
2976#if EV_CLEANUP_ENABLE
2977 assert (cleanupmax >= cleanupcnt);
2978 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2979#endif
2980
2981#if EV_ASYNC_ENABLE
2982 assert (asyncmax >= asynccnt);
2983 array_verify (EV_A_ (W *)asyncs, asynccnt);
2984#endif
2985
2986#if EV_PREPARE_ENABLE
2987 assert (preparemax >= preparecnt);
2988 array_verify (EV_A_ (W *)prepares, preparecnt);
2989#endif
2990
2991#if EV_CHECK_ENABLE
2992 assert (checkmax >= checkcnt);
2993 array_verify (EV_A_ (W *)checks, checkcnt);
2994#endif
2995
2996# if 0
2997#if EV_CHILD_ENABLE
2998 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2999 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3000#endif
3001# endif
3002#endif
3003}
3004#endif
3005
3006#if EV_MULTIPLICITY
3007struct ev_loop * ecb_cold
3008#else
558int 3009int
559ev_method (EV_P) 3010#endif
3011ev_default_loop (unsigned int flags) EV_THROW
560{ 3012{
561 return method; 3013 if (!ev_default_loop_ptr)
562}
563
564static void
565loop_init (EV_P_ int methods)
566{
567 if (!method)
568 {
569#if EV_USE_MONOTONIC
570 { 3014 {
571 struct timespec ts;
572 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
573 have_monotonic = 1;
574 }
575#endif
576
577 rt_now = ev_time ();
578 mn_now = get_clock ();
579 now_floor = mn_now;
580 rtmn_diff = rt_now - mn_now;
581
582 if (methods == EVMETHOD_AUTO)
583 if (!enable_secure () && getenv ("LIBEV_METHODS"))
584 methods = atoi (getenv ("LIBEV_METHODS"));
585 else
586 methods = EVMETHOD_ANY;
587
588 method = 0;
589#if EV_USE_KQUEUE
590 if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
591#endif
592#if EV_USE_EPOLL
593 if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
594#endif
595#if EV_USEV_POLL
596 if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
597#endif
598#if EV_USE_SELECT
599 if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
600#endif
601 }
602}
603
604void
605loop_destroy (EV_P)
606{
607#if EV_USE_KQUEUE
608 if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
609#endif
610#if EV_USE_EPOLL
611 if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
612#endif
613#if EV_USEV_POLL
614 if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
615#endif
616#if EV_USE_SELECT
617 if (method == EVMETHOD_SELECT) select_destroy (EV_A);
618#endif
619
620 method = 0;
621 /*TODO*/
622}
623
624void
625loop_fork (EV_P)
626{
627 /*TODO*/
628#if EV_USE_EPOLL
629 if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
630#endif
631#if EV_USE_KQUEUE
632 if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
633#endif
634}
635
636#if EV_MULTIPLICITY 3015#if EV_MULTIPLICITY
637struct ev_loop * 3016 EV_P = ev_default_loop_ptr = &default_loop_struct;
638ev_loop_new (int methods)
639{
640 struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
641
642 loop_init (EV_A_ methods);
643
644 if (ev_methods (EV_A))
645 return loop;
646
647 return 0;
648}
649
650void
651ev_loop_destroy (EV_P)
652{
653 loop_destroy (EV_A);
654 free (loop);
655}
656
657void
658ev_loop_fork (EV_P)
659{
660 loop_fork (EV_A);
661}
662
663#endif
664
665#if EV_MULTIPLICITY
666struct ev_loop default_loop_struct;
667static struct ev_loop *default_loop;
668
669struct ev_loop *
670#else 3017#else
671static int default_loop;
672
673int
674#endif
675ev_default_loop (int methods)
676{
677 if (sigpipe [0] == sigpipe [1])
678 if (pipe (sigpipe))
679 return 0;
680
681 if (!default_loop)
682 {
683#if EV_MULTIPLICITY
684 struct ev_loop *loop = default_loop = &default_loop_struct;
685#else
686 default_loop = 1; 3018 ev_default_loop_ptr = 1;
687#endif 3019#endif
688 3020
689 loop_init (EV_A_ methods); 3021 loop_init (EV_A_ flags);
690 3022
691 if (ev_method (EV_A)) 3023 if (ev_backend (EV_A))
692 { 3024 {
693 ev_watcher_init (&sigev, sigcb); 3025#if EV_CHILD_ENABLE
694 ev_set_priority (&sigev, EV_MAXPRI);
695 siginit (EV_A);
696
697#ifndef WIN32
698 ev_signal_init (&childev, childcb, SIGCHLD); 3026 ev_signal_init (&childev, childcb, SIGCHLD);
699 ev_set_priority (&childev, EV_MAXPRI); 3027 ev_set_priority (&childev, EV_MAXPRI);
700 ev_signal_start (EV_A_ &childev); 3028 ev_signal_start (EV_A_ &childev);
701 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3029 ev_unref (EV_A); /* child watcher should not keep loop alive */
702#endif 3030#endif
703 } 3031 }
704 else 3032 else
705 default_loop = 0; 3033 ev_default_loop_ptr = 0;
706 } 3034 }
707 3035
708 return default_loop; 3036 return ev_default_loop_ptr;
709} 3037}
710 3038
711void 3039void
712ev_default_destroy (void) 3040ev_loop_fork (EV_P) EV_THROW
713{ 3041{
714#if EV_MULTIPLICITY 3042 postfork = 1;
715 struct ev_loop *loop = default_loop;
716#endif
717
718 ev_ref (EV_A); /* child watcher */
719 ev_signal_stop (EV_A_ &childev);
720
721 ev_ref (EV_A); /* signal watcher */
722 ev_io_stop (EV_A_ &sigev);
723
724 close (sigpipe [0]); sigpipe [0] = 0;
725 close (sigpipe [1]); sigpipe [1] = 0;
726
727 loop_destroy (EV_A);
728} 3043}
3044
3045/*****************************************************************************/
729 3046
730void 3047void
731ev_default_fork (EV_P) 3048ev_invoke (EV_P_ void *w, int revents)
732{ 3049{
733 loop_fork (EV_A); 3050 EV_CB_INVOKE ((W)w, revents);
734
735 ev_io_stop (EV_A_ &sigev);
736 close (sigpipe [0]);
737 close (sigpipe [1]);
738 pipe (sigpipe);
739
740 ev_ref (EV_A); /* signal watcher */
741 siginit (EV_A);
742} 3051}
743 3052
744/*****************************************************************************/ 3053unsigned int
745 3054ev_pending_count (EV_P) EV_THROW
746static void
747call_pending (EV_P)
748{ 3055{
749 int pri; 3056 int pri;
3057 unsigned int count = 0;
750 3058
751 for (pri = NUMPRI; pri--; ) 3059 for (pri = NUMPRI; pri--; )
3060 count += pendingcnt [pri];
3061
3062 return count;
3063}
3064
3065void noinline
3066ev_invoke_pending (EV_P)
3067{
3068 pendingpri = NUMPRI;
3069
3070 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3071 {
3072 --pendingpri;
3073
752 while (pendingcnt [pri]) 3074 while (pendingcnt [pendingpri])
753 {
754 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
755
756 if (p->w)
757 {
758 p->w->pending = 0;
759 p->w->cb (EV_A_ p->w, p->events);
760 }
761 }
762}
763
764static void
765timers_reify (EV_P)
766{
767 while (timercnt && timers [0]->at <= mn_now)
768 {
769 struct ev_timer *w = timers [0];
770
771 /* first reschedule or stop timer */
772 if (w->repeat)
773 { 3075 {
774 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3076 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
775 w->at = mn_now + w->repeat; 3077
776 downheap ((WT *)timers, timercnt, 0); 3078 p->w->pending = 0;
3079 EV_CB_INVOKE (p->w, p->events);
3080 EV_FREQUENT_CHECK;
777 } 3081 }
778 else
779 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
780
781 event (EV_A_ (W)w, EV_TIMEOUT);
782 }
783}
784
785static void
786periodics_reify (EV_P)
787{
788 while (periodiccnt && periodics [0]->at <= rt_now)
789 { 3082 }
790 struct ev_periodic *w = periodics [0]; 3083}
791 3084
792 /* first reschedule or stop timer */ 3085#if EV_IDLE_ENABLE
793 if (w->interval) 3086/* make idle watchers pending. this handles the "call-idle */
3087/* only when higher priorities are idle" logic */
3088inline_size void
3089idle_reify (EV_P)
3090{
3091 if (expect_false (idleall))
3092 {
3093 int pri;
3094
3095 for (pri = NUMPRI; pri--; )
794 { 3096 {
795 w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval; 3097 if (pendingcnt [pri])
796 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now)); 3098 break;
797 downheap ((WT *)periodics, periodiccnt, 0);
798 }
799 else
800 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
801 3099
802 event (EV_A_ (W)w, EV_PERIODIC); 3100 if (idlecnt [pri])
803 }
804}
805
806static void
807periodics_reschedule (EV_P)
808{
809 int i;
810
811 /* adjust periodics after time jump */
812 for (i = 0; i < periodiccnt; ++i)
813 {
814 struct ev_periodic *w = periodics [i];
815
816 if (w->interval)
817 {
818 ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
819
820 if (fabs (diff) >= 1e-4)
821 { 3101 {
822 ev_periodic_stop (EV_A_ w); 3102 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
823 ev_periodic_start (EV_A_ w); 3103 break;
824
825 i = 0; /* restart loop, inefficient, but time jumps should be rare */
826 } 3104 }
827 } 3105 }
828 } 3106 }
829} 3107}
3108#endif
830 3109
831inline int 3110/* make timers pending */
832time_update_monotonic (EV_P) 3111inline_size void
3112timers_reify (EV_P)
833{ 3113{
834 mn_now = get_clock (); 3114 EV_FREQUENT_CHECK;
835 3115
836 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 3116 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
837 {
838 rt_now = rtmn_diff + mn_now;
839 return 0;
840 } 3117 {
841 else 3118 do
3119 {
3120 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
3121
3122 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
3123
3124 /* first reschedule or stop timer */
3125 if (w->repeat)
3126 {
3127 ev_at (w) += w->repeat;
3128 if (ev_at (w) < mn_now)
3129 ev_at (w) = mn_now;
3130
3131 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
3132
3133 ANHE_at_cache (timers [HEAP0]);
3134 downheap (timers, timercnt, HEAP0);
3135 }
3136 else
3137 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
3138
3139 EV_FREQUENT_CHECK;
3140 feed_reverse (EV_A_ (W)w);
3141 }
3142 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
3143
3144 feed_reverse_done (EV_A_ EV_TIMER);
842 { 3145 }
843 now_floor = mn_now; 3146}
844 rt_now = ev_time (); 3147
845 return 1; 3148#if EV_PERIODIC_ENABLE
3149
3150static void noinline
3151periodic_recalc (EV_P_ ev_periodic *w)
3152{
3153 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3154 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3155
3156 /* the above almost always errs on the low side */
3157 while (at <= ev_rt_now)
846 } 3158 {
847} 3159 ev_tstamp nat = at + w->interval;
848 3160
849static void 3161 /* when resolution fails us, we use ev_rt_now */
850time_update (EV_P) 3162 if (expect_false (nat == at))
3163 {
3164 at = ev_rt_now;
3165 break;
3166 }
3167
3168 at = nat;
3169 }
3170
3171 ev_at (w) = at;
3172}
3173
3174/* make periodics pending */
3175inline_size void
3176periodics_reify (EV_P)
3177{
3178 EV_FREQUENT_CHECK;
3179
3180 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
3181 {
3182 do
3183 {
3184 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
3185
3186 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
3187
3188 /* first reschedule or stop timer */
3189 if (w->reschedule_cb)
3190 {
3191 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3192
3193 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
3194
3195 ANHE_at_cache (periodics [HEAP0]);
3196 downheap (periodics, periodiccnt, HEAP0);
3197 }
3198 else if (w->interval)
3199 {
3200 periodic_recalc (EV_A_ w);
3201 ANHE_at_cache (periodics [HEAP0]);
3202 downheap (periodics, periodiccnt, HEAP0);
3203 }
3204 else
3205 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
3206
3207 EV_FREQUENT_CHECK;
3208 feed_reverse (EV_A_ (W)w);
3209 }
3210 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
3211
3212 feed_reverse_done (EV_A_ EV_PERIODIC);
3213 }
3214}
3215
3216/* simply recalculate all periodics */
3217/* TODO: maybe ensure that at least one event happens when jumping forward? */
3218static void noinline ecb_cold
3219periodics_reschedule (EV_P)
851{ 3220{
852 int i; 3221 int i;
853 3222
3223 /* adjust periodics after time jump */
3224 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
3225 {
3226 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
3227
3228 if (w->reschedule_cb)
3229 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3230 else if (w->interval)
3231 periodic_recalc (EV_A_ w);
3232
3233 ANHE_at_cache (periodics [i]);
3234 }
3235
3236 reheap (periodics, periodiccnt);
3237}
3238#endif
3239
3240/* adjust all timers by a given offset */
3241static void noinline ecb_cold
3242timers_reschedule (EV_P_ ev_tstamp adjust)
3243{
3244 int i;
3245
3246 for (i = 0; i < timercnt; ++i)
3247 {
3248 ANHE *he = timers + i + HEAP0;
3249 ANHE_w (*he)->at += adjust;
3250 ANHE_at_cache (*he);
3251 }
3252}
3253
3254/* fetch new monotonic and realtime times from the kernel */
3255/* also detect if there was a timejump, and act accordingly */
3256inline_speed void
3257time_update (EV_P_ ev_tstamp max_block)
3258{
854#if EV_USE_MONOTONIC 3259#if EV_USE_MONOTONIC
855 if (expect_true (have_monotonic)) 3260 if (expect_true (have_monotonic))
856 { 3261 {
857 if (time_update_monotonic (EV_A)) 3262 int i;
3263 ev_tstamp odiff = rtmn_diff;
3264
3265 mn_now = get_clock ();
3266
3267 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
3268 /* interpolate in the meantime */
3269 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
858 { 3270 {
859 ev_tstamp odiff = rtmn_diff; 3271 ev_rt_now = rtmn_diff + mn_now;
3272 return;
3273 }
860 3274
3275 now_floor = mn_now;
3276 ev_rt_now = ev_time ();
3277
861 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 3278 /* loop a few times, before making important decisions.
3279 * on the choice of "4": one iteration isn't enough,
3280 * in case we get preempted during the calls to
3281 * ev_time and get_clock. a second call is almost guaranteed
3282 * to succeed in that case, though. and looping a few more times
3283 * doesn't hurt either as we only do this on time-jumps or
3284 * in the unlikely event of having been preempted here.
3285 */
3286 for (i = 4; --i; )
862 { 3287 {
3288 ev_tstamp diff;
863 rtmn_diff = rt_now - mn_now; 3289 rtmn_diff = ev_rt_now - mn_now;
864 3290
865 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 3291 diff = odiff - rtmn_diff;
3292
3293 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
866 return; /* all is well */ 3294 return; /* all is well */
867 3295
868 rt_now = ev_time (); 3296 ev_rt_now = ev_time ();
869 mn_now = get_clock (); 3297 mn_now = get_clock ();
870 now_floor = mn_now; 3298 now_floor = mn_now;
871 } 3299 }
872 3300
3301 /* no timer adjustment, as the monotonic clock doesn't jump */
3302 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
3303# if EV_PERIODIC_ENABLE
3304 periodics_reschedule (EV_A);
3305# endif
3306 }
3307 else
3308#endif
3309 {
3310 ev_rt_now = ev_time ();
3311
3312 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
3313 {
3314 /* adjust timers. this is easy, as the offset is the same for all of them */
3315 timers_reschedule (EV_A_ ev_rt_now - mn_now);
3316#if EV_PERIODIC_ENABLE
873 periodics_reschedule (EV_A); 3317 periodics_reschedule (EV_A);
874 /* no timer adjustment, as the monotonic clock doesn't jump */ 3318#endif
875 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
876 } 3319 }
877 }
878 else
879#endif
880 {
881 rt_now = ev_time ();
882 3320
883 if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
884 {
885 periodics_reschedule (EV_A);
886
887 /* adjust timers. this is easy, as the offset is the same for all */
888 for (i = 0; i < timercnt; ++i)
889 timers [i]->at += rt_now - mn_now;
890 }
891
892 mn_now = rt_now; 3321 mn_now = ev_rt_now;
893 } 3322 }
894} 3323}
895 3324
896void 3325int
897ev_ref (EV_P)
898{
899 ++activecnt;
900}
901
902void
903ev_unref (EV_P)
904{
905 --activecnt;
906}
907
908static int loop_done;
909
910void
911ev_loop (EV_P_ int flags) 3326ev_run (EV_P_ int flags)
912{ 3327{
913 double block; 3328#if EV_FEATURE_API
914 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0; 3329 ++loop_depth;
3330#endif
3331
3332 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3333
3334 loop_done = EVBREAK_CANCEL;
3335
3336 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
915 3337
916 do 3338 do
917 { 3339 {
3340#if EV_VERIFY >= 2
3341 ev_verify (EV_A);
3342#endif
3343
3344#ifndef _WIN32
3345 if (expect_false (curpid)) /* penalise the forking check even more */
3346 if (expect_false (getpid () != curpid))
3347 {
3348 curpid = getpid ();
3349 postfork = 1;
3350 }
3351#endif
3352
3353#if EV_FORK_ENABLE
3354 /* we might have forked, so queue fork handlers */
3355 if (expect_false (postfork))
3356 if (forkcnt)
3357 {
3358 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
3359 EV_INVOKE_PENDING;
3360 }
3361#endif
3362
3363#if EV_PREPARE_ENABLE
918 /* queue check watchers (and execute them) */ 3364 /* queue prepare watchers (and execute them) */
919 if (expect_false (preparecnt)) 3365 if (expect_false (preparecnt))
920 { 3366 {
921 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3367 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
922 call_pending (EV_A); 3368 EV_INVOKE_PENDING;
923 } 3369 }
3370#endif
3371
3372 if (expect_false (loop_done))
3373 break;
3374
3375 /* we might have forked, so reify kernel state if necessary */
3376 if (expect_false (postfork))
3377 loop_fork (EV_A);
924 3378
925 /* update fd-related kernel structures */ 3379 /* update fd-related kernel structures */
926 fd_reify (EV_A); 3380 fd_reify (EV_A);
927 3381
928 /* calculate blocking time */ 3382 /* calculate blocking time */
3383 {
3384 ev_tstamp waittime = 0.;
3385 ev_tstamp sleeptime = 0.;
929 3386
930 /* we only need this for !monotonic clockor timers, but as we basically 3387 /* remember old timestamp for io_blocktime calculation */
931 always have timers, we just calculate it always */ 3388 ev_tstamp prev_mn_now = mn_now;
932#if EV_USE_MONOTONIC 3389
933 if (expect_true (have_monotonic)) 3390 /* update time to cancel out callback processing overhead */
934 time_update_monotonic (EV_A); 3391 time_update (EV_A_ 1e100);
935 else 3392
936#endif 3393 /* from now on, we want a pipe-wake-up */
3394 pipe_write_wanted = 1;
3395
3396 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3397
3398 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
937 { 3399 {
938 rt_now = ev_time ();
939 mn_now = rt_now;
940 }
941
942 if (flags & EVLOOP_NONBLOCK || idlecnt)
943 block = 0.;
944 else
945 {
946 block = MAX_BLOCKTIME; 3400 waittime = MAX_BLOCKTIME;
947 3401
948 if (timercnt) 3402 if (timercnt)
949 { 3403 {
950 ev_tstamp to = timers [0]->at - mn_now + method_fudge; 3404 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
951 if (block > to) block = to; 3405 if (waittime > to) waittime = to;
952 } 3406 }
953 3407
3408#if EV_PERIODIC_ENABLE
954 if (periodiccnt) 3409 if (periodiccnt)
955 { 3410 {
956 ev_tstamp to = periodics [0]->at - rt_now + method_fudge; 3411 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
957 if (block > to) block = to; 3412 if (waittime > to) waittime = to;
958 } 3413 }
3414#endif
959 3415
960 if (block < 0.) block = 0.; 3416 /* don't let timeouts decrease the waittime below timeout_blocktime */
3417 if (expect_false (waittime < timeout_blocktime))
3418 waittime = timeout_blocktime;
3419
3420 /* at this point, we NEED to wait, so we have to ensure */
3421 /* to pass a minimum nonzero value to the backend */
3422 if (expect_false (waittime < backend_mintime))
3423 waittime = backend_mintime;
3424
3425 /* extra check because io_blocktime is commonly 0 */
3426 if (expect_false (io_blocktime))
3427 {
3428 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3429
3430 if (sleeptime > waittime - backend_mintime)
3431 sleeptime = waittime - backend_mintime;
3432
3433 if (expect_true (sleeptime > 0.))
3434 {
3435 ev_sleep (sleeptime);
3436 waittime -= sleeptime;
3437 }
3438 }
961 } 3439 }
962 3440
963 method_poll (EV_A_ block); 3441#if EV_FEATURE_API
3442 ++loop_count;
3443#endif
3444 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
3445 backend_poll (EV_A_ waittime);
3446 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
964 3447
3448 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3449
3450 ECB_MEMORY_FENCE_ACQUIRE;
3451 if (pipe_write_skipped)
3452 {
3453 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3454 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3455 }
3456
3457
965 /* update rt_now, do magic */ 3458 /* update ev_rt_now, do magic */
966 time_update (EV_A); 3459 time_update (EV_A_ waittime + sleeptime);
3460 }
967 3461
968 /* queue pending timers and reschedule them */ 3462 /* queue pending timers and reschedule them */
969 timers_reify (EV_A); /* relative timers called last */ 3463 timers_reify (EV_A); /* relative timers called last */
3464#if EV_PERIODIC_ENABLE
970 periodics_reify (EV_A); /* absolute timers called first */ 3465 periodics_reify (EV_A); /* absolute timers called first */
3466#endif
971 3467
3468#if EV_IDLE_ENABLE
972 /* queue idle watchers unless io or timers are pending */ 3469 /* queue idle watchers unless other events are pending */
973 if (!pendingcnt) 3470 idle_reify (EV_A);
974 queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE); 3471#endif
975 3472
3473#if EV_CHECK_ENABLE
976 /* queue check watchers, to be executed first */ 3474 /* queue check watchers, to be executed first */
977 if (checkcnt) 3475 if (expect_false (checkcnt))
978 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3476 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3477#endif
979 3478
980 call_pending (EV_A); 3479 EV_INVOKE_PENDING;
981 } 3480 }
982 while (activecnt && !loop_done); 3481 while (expect_true (
3482 activecnt
3483 && !loop_done
3484 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3485 ));
983 3486
984 if (loop_done != 2) 3487 if (loop_done == EVBREAK_ONE)
985 loop_done = 0; 3488 loop_done = EVBREAK_CANCEL;
3489
3490#if EV_FEATURE_API
3491 --loop_depth;
3492#endif
3493
3494 return activecnt;
986} 3495}
987 3496
988void 3497void
989ev_unloop (EV_P_ int how) 3498ev_break (EV_P_ int how) EV_THROW
990{ 3499{
991 loop_done = how; 3500 loop_done = how;
992} 3501}
993 3502
3503void
3504ev_ref (EV_P) EV_THROW
3505{
3506 ++activecnt;
3507}
3508
3509void
3510ev_unref (EV_P) EV_THROW
3511{
3512 --activecnt;
3513}
3514
3515void
3516ev_now_update (EV_P) EV_THROW
3517{
3518 time_update (EV_A_ 1e100);
3519}
3520
3521void
3522ev_suspend (EV_P) EV_THROW
3523{
3524 ev_now_update (EV_A);
3525}
3526
3527void
3528ev_resume (EV_P) EV_THROW
3529{
3530 ev_tstamp mn_prev = mn_now;
3531
3532 ev_now_update (EV_A);
3533 timers_reschedule (EV_A_ mn_now - mn_prev);
3534#if EV_PERIODIC_ENABLE
3535 /* TODO: really do this? */
3536 periodics_reschedule (EV_A);
3537#endif
3538}
3539
994/*****************************************************************************/ 3540/*****************************************************************************/
3541/* singly-linked list management, used when the expected list length is short */
995 3542
996inline void 3543inline_size void
997wlist_add (WL *head, WL elem) 3544wlist_add (WL *head, WL elem)
998{ 3545{
999 elem->next = *head; 3546 elem->next = *head;
1000 *head = elem; 3547 *head = elem;
1001} 3548}
1002 3549
1003inline void 3550inline_size void
1004wlist_del (WL *head, WL elem) 3551wlist_del (WL *head, WL elem)
1005{ 3552{
1006 while (*head) 3553 while (*head)
1007 { 3554 {
1008 if (*head == elem) 3555 if (expect_true (*head == elem))
1009 { 3556 {
1010 *head = elem->next; 3557 *head = elem->next;
1011 return; 3558 break;
1012 } 3559 }
1013 3560
1014 head = &(*head)->next; 3561 head = &(*head)->next;
1015 } 3562 }
1016} 3563}
1017 3564
3565/* internal, faster, version of ev_clear_pending */
1018inline void 3566inline_speed void
1019ev_clear_pending (EV_P_ W w) 3567clear_pending (EV_P_ W w)
1020{ 3568{
1021 if (w->pending) 3569 if (w->pending)
1022 { 3570 {
1023 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3571 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1024 w->pending = 0; 3572 w->pending = 0;
1025 } 3573 }
1026} 3574}
1027 3575
3576int
3577ev_clear_pending (EV_P_ void *w) EV_THROW
3578{
3579 W w_ = (W)w;
3580 int pending = w_->pending;
3581
3582 if (expect_true (pending))
3583 {
3584 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3585 p->w = (W)&pending_w;
3586 w_->pending = 0;
3587 return p->events;
3588 }
3589 else
3590 return 0;
3591}
3592
1028inline void 3593inline_size void
3594pri_adjust (EV_P_ W w)
3595{
3596 int pri = ev_priority (w);
3597 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3598 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3599 ev_set_priority (w, pri);
3600}
3601
3602inline_speed void
1029ev_start (EV_P_ W w, int active) 3603ev_start (EV_P_ W w, int active)
1030{ 3604{
1031 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI; 3605 pri_adjust (EV_A_ w);
1032 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1033
1034 w->active = active; 3606 w->active = active;
1035 ev_ref (EV_A); 3607 ev_ref (EV_A);
1036} 3608}
1037 3609
1038inline void 3610inline_size void
1039ev_stop (EV_P_ W w) 3611ev_stop (EV_P_ W w)
1040{ 3612{
1041 ev_unref (EV_A); 3613 ev_unref (EV_A);
1042 w->active = 0; 3614 w->active = 0;
1043} 3615}
1044 3616
1045/*****************************************************************************/ 3617/*****************************************************************************/
1046 3618
1047void 3619void noinline
1048ev_io_start (EV_P_ struct ev_io *w) 3620ev_io_start (EV_P_ ev_io *w) EV_THROW
1049{ 3621{
1050 int fd = w->fd; 3622 int fd = w->fd;
1051 3623
1052 if (ev_is_active (w)) 3624 if (expect_false (ev_is_active (w)))
1053 return; 3625 return;
1054 3626
1055 assert (("ev_io_start called with negative fd", fd >= 0)); 3627 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3628 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3629
3630 EV_FREQUENT_CHECK;
1056 3631
1057 ev_start (EV_A_ (W)w, 1); 3632 ev_start (EV_A_ (W)w, 1);
1058 array_needsize (anfds, anfdmax, fd + 1, anfds_init); 3633 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
1059 wlist_add ((WL *)&anfds[fd].head, (WL)w); 3634 wlist_add (&anfds[fd].head, (WL)w);
1060 3635
1061 fd_change (EV_A_ fd); 3636 /* common bug, apparently */
1062} 3637 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
1063 3638
1064void 3639 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3640 w->events &= ~EV__IOFDSET;
3641
3642 EV_FREQUENT_CHECK;
3643}
3644
3645void noinline
1065ev_io_stop (EV_P_ struct ev_io *w) 3646ev_io_stop (EV_P_ ev_io *w) EV_THROW
1066{ 3647{
1067 ev_clear_pending (EV_A_ (W)w); 3648 clear_pending (EV_A_ (W)w);
1068 if (!ev_is_active (w)) 3649 if (expect_false (!ev_is_active (w)))
1069 return; 3650 return;
1070 3651
3652 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3653
3654 EV_FREQUENT_CHECK;
3655
1071 wlist_del ((WL *)&anfds[w->fd].head, (WL)w); 3656 wlist_del (&anfds[w->fd].head, (WL)w);
1072 ev_stop (EV_A_ (W)w); 3657 ev_stop (EV_A_ (W)w);
1073 3658
1074 fd_change (EV_A_ w->fd); 3659 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1075}
1076 3660
1077void 3661 EV_FREQUENT_CHECK;
3662}
3663
3664void noinline
1078ev_timer_start (EV_P_ struct ev_timer *w) 3665ev_timer_start (EV_P_ ev_timer *w) EV_THROW
1079{ 3666{
1080 if (ev_is_active (w)) 3667 if (expect_false (ev_is_active (w)))
1081 return; 3668 return;
1082 3669
1083 w->at += mn_now; 3670 ev_at (w) += mn_now;
1084 3671
1085 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3672 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1086 3673
3674 EV_FREQUENT_CHECK;
3675
3676 ++timercnt;
1087 ev_start (EV_A_ (W)w, ++timercnt); 3677 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1088 array_needsize (timers, timermax, timercnt, ); 3678 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1089 timers [timercnt - 1] = w; 3679 ANHE_w (timers [ev_active (w)]) = (WT)w;
1090 upheap ((WT *)timers, timercnt - 1); 3680 ANHE_at_cache (timers [ev_active (w)]);
1091} 3681 upheap (timers, ev_active (w));
1092 3682
1093void 3683 EV_FREQUENT_CHECK;
3684
3685 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
3686}
3687
3688void noinline
1094ev_timer_stop (EV_P_ struct ev_timer *w) 3689ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
1095{ 3690{
1096 ev_clear_pending (EV_A_ (W)w); 3691 clear_pending (EV_A_ (W)w);
1097 if (!ev_is_active (w)) 3692 if (expect_false (!ev_is_active (w)))
1098 return; 3693 return;
1099 3694
1100 if (w->active < timercnt--) 3695 EV_FREQUENT_CHECK;
3696
3697 {
3698 int active = ev_active (w);
3699
3700 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3701
3702 --timercnt;
3703
3704 if (expect_true (active < timercnt + HEAP0))
1101 { 3705 {
1102 timers [w->active - 1] = timers [timercnt]; 3706 timers [active] = timers [timercnt + HEAP0];
1103 downheap ((WT *)timers, timercnt, w->active - 1); 3707 adjustheap (timers, timercnt, active);
1104 } 3708 }
3709 }
1105 3710
1106 w->at = w->repeat; 3711 ev_at (w) -= mn_now;
1107 3712
1108 ev_stop (EV_A_ (W)w); 3713 ev_stop (EV_A_ (W)w);
1109}
1110 3714
1111void 3715 EV_FREQUENT_CHECK;
3716}
3717
3718void noinline
1112ev_timer_again (EV_P_ struct ev_timer *w) 3719ev_timer_again (EV_P_ ev_timer *w) EV_THROW
1113{ 3720{
3721 EV_FREQUENT_CHECK;
3722
3723 clear_pending (EV_A_ (W)w);
3724
1114 if (ev_is_active (w)) 3725 if (ev_is_active (w))
1115 { 3726 {
1116 if (w->repeat) 3727 if (w->repeat)
1117 { 3728 {
1118 w->at = mn_now + w->repeat; 3729 ev_at (w) = mn_now + w->repeat;
3730 ANHE_at_cache (timers [ev_active (w)]);
1119 downheap ((WT *)timers, timercnt, w->active - 1); 3731 adjustheap (timers, timercnt, ev_active (w));
1120 } 3732 }
1121 else 3733 else
1122 ev_timer_stop (EV_A_ w); 3734 ev_timer_stop (EV_A_ w);
1123 } 3735 }
1124 else if (w->repeat) 3736 else if (w->repeat)
3737 {
3738 ev_at (w) = w->repeat;
1125 ev_timer_start (EV_A_ w); 3739 ev_timer_start (EV_A_ w);
1126} 3740 }
1127 3741
1128void 3742 EV_FREQUENT_CHECK;
3743}
3744
3745ev_tstamp
3746ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3747{
3748 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3749}
3750
3751#if EV_PERIODIC_ENABLE
3752void noinline
1129ev_periodic_start (EV_P_ struct ev_periodic *w) 3753ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
1130{ 3754{
1131 if (ev_is_active (w)) 3755 if (expect_false (ev_is_active (w)))
1132 return; 3756 return;
1133 3757
3758 if (w->reschedule_cb)
3759 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3760 else if (w->interval)
3761 {
1134 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3762 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
3763 periodic_recalc (EV_A_ w);
3764 }
3765 else
3766 ev_at (w) = w->offset;
1135 3767
1136 /* this formula differs from the one in periodic_reify because we do not always round up */ 3768 EV_FREQUENT_CHECK;
1137 if (w->interval)
1138 w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
1139 3769
3770 ++periodiccnt;
1140 ev_start (EV_A_ (W)w, ++periodiccnt); 3771 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1141 array_needsize (periodics, periodicmax, periodiccnt, ); 3772 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1142 periodics [periodiccnt - 1] = w; 3773 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1143 upheap ((WT *)periodics, periodiccnt - 1); 3774 ANHE_at_cache (periodics [ev_active (w)]);
1144} 3775 upheap (periodics, ev_active (w));
1145 3776
1146void 3777 EV_FREQUENT_CHECK;
3778
3779 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
3780}
3781
3782void noinline
1147ev_periodic_stop (EV_P_ struct ev_periodic *w) 3783ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
1148{ 3784{
1149 ev_clear_pending (EV_A_ (W)w); 3785 clear_pending (EV_A_ (W)w);
1150 if (!ev_is_active (w)) 3786 if (expect_false (!ev_is_active (w)))
1151 return; 3787 return;
1152 3788
1153 if (w->active < periodiccnt--) 3789 EV_FREQUENT_CHECK;
3790
3791 {
3792 int active = ev_active (w);
3793
3794 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3795
3796 --periodiccnt;
3797
3798 if (expect_true (active < periodiccnt + HEAP0))
1154 { 3799 {
1155 periodics [w->active - 1] = periodics [periodiccnt]; 3800 periodics [active] = periodics [periodiccnt + HEAP0];
1156 downheap ((WT *)periodics, periodiccnt, w->active - 1); 3801 adjustheap (periodics, periodiccnt, active);
1157 } 3802 }
3803 }
1158 3804
1159 ev_stop (EV_A_ (W)w); 3805 ev_stop (EV_A_ (W)w);
1160}
1161 3806
1162void 3807 EV_FREQUENT_CHECK;
1163ev_idle_start (EV_P_ struct ev_idle *w)
1164{
1165 if (ev_is_active (w))
1166 return;
1167
1168 ev_start (EV_A_ (W)w, ++idlecnt);
1169 array_needsize (idles, idlemax, idlecnt, );
1170 idles [idlecnt - 1] = w;
1171} 3808}
1172 3809
1173void 3810void noinline
1174ev_idle_stop (EV_P_ struct ev_idle *w) 3811ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
1175{ 3812{
1176 ev_clear_pending (EV_A_ (W)w); 3813 /* TODO: use adjustheap and recalculation */
1177 if (ev_is_active (w))
1178 return;
1179
1180 idles [w->active - 1] = idles [--idlecnt];
1181 ev_stop (EV_A_ (W)w); 3814 ev_periodic_stop (EV_A_ w);
3815 ev_periodic_start (EV_A_ w);
1182} 3816}
1183 3817#endif
1184void
1185ev_prepare_start (EV_P_ struct ev_prepare *w)
1186{
1187 if (ev_is_active (w))
1188 return;
1189
1190 ev_start (EV_A_ (W)w, ++preparecnt);
1191 array_needsize (prepares, preparemax, preparecnt, );
1192 prepares [preparecnt - 1] = w;
1193}
1194
1195void
1196ev_prepare_stop (EV_P_ struct ev_prepare *w)
1197{
1198 ev_clear_pending (EV_A_ (W)w);
1199 if (ev_is_active (w))
1200 return;
1201
1202 prepares [w->active - 1] = prepares [--preparecnt];
1203 ev_stop (EV_A_ (W)w);
1204}
1205
1206void
1207ev_check_start (EV_P_ struct ev_check *w)
1208{
1209 if (ev_is_active (w))
1210 return;
1211
1212 ev_start (EV_A_ (W)w, ++checkcnt);
1213 array_needsize (checks, checkmax, checkcnt, );
1214 checks [checkcnt - 1] = w;
1215}
1216
1217void
1218ev_check_stop (EV_P_ struct ev_check *w)
1219{
1220 ev_clear_pending (EV_A_ (W)w);
1221 if (ev_is_active (w))
1222 return;
1223
1224 checks [w->active - 1] = checks [--checkcnt];
1225 ev_stop (EV_A_ (W)w);
1226}
1227 3818
1228#ifndef SA_RESTART 3819#ifndef SA_RESTART
1229# define SA_RESTART 0 3820# define SA_RESTART 0
1230#endif 3821#endif
1231 3822
3823#if EV_SIGNAL_ENABLE
3824
3825void noinline
3826ev_signal_start (EV_P_ ev_signal *w) EV_THROW
3827{
3828 if (expect_false (ev_is_active (w)))
3829 return;
3830
3831 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3832
3833#if EV_MULTIPLICITY
3834 assert (("libev: a signal must not be attached to two different loops",
3835 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3836
3837 signals [w->signum - 1].loop = EV_A;
3838 ECB_MEMORY_FENCE_RELEASE;
3839#endif
3840
3841 EV_FREQUENT_CHECK;
3842
3843#if EV_USE_SIGNALFD
3844 if (sigfd == -2)
3845 {
3846 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3847 if (sigfd < 0 && errno == EINVAL)
3848 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3849
3850 if (sigfd >= 0)
3851 {
3852 fd_intern (sigfd); /* doing it twice will not hurt */
3853
3854 sigemptyset (&sigfd_set);
3855
3856 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3857 ev_set_priority (&sigfd_w, EV_MAXPRI);
3858 ev_io_start (EV_A_ &sigfd_w);
3859 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3860 }
3861 }
3862
3863 if (sigfd >= 0)
3864 {
3865 /* TODO: check .head */
3866 sigaddset (&sigfd_set, w->signum);
3867 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3868
3869 signalfd (sigfd, &sigfd_set, 0);
3870 }
3871#endif
3872
3873 ev_start (EV_A_ (W)w, 1);
3874 wlist_add (&signals [w->signum - 1].head, (WL)w);
3875
3876 if (!((WL)w)->next)
3877# if EV_USE_SIGNALFD
3878 if (sigfd < 0) /*TODO*/
3879# endif
3880 {
3881# ifdef _WIN32
3882 evpipe_init (EV_A);
3883
3884 signal (w->signum, ev_sighandler);
3885# else
3886 struct sigaction sa;
3887
3888 evpipe_init (EV_A);
3889
3890 sa.sa_handler = ev_sighandler;
3891 sigfillset (&sa.sa_mask);
3892 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3893 sigaction (w->signum, &sa, 0);
3894
3895 if (origflags & EVFLAG_NOSIGMASK)
3896 {
3897 sigemptyset (&sa.sa_mask);
3898 sigaddset (&sa.sa_mask, w->signum);
3899 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3900 }
3901#endif
3902 }
3903
3904 EV_FREQUENT_CHECK;
3905}
3906
3907void noinline
3908ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
3909{
3910 clear_pending (EV_A_ (W)w);
3911 if (expect_false (!ev_is_active (w)))
3912 return;
3913
3914 EV_FREQUENT_CHECK;
3915
3916 wlist_del (&signals [w->signum - 1].head, (WL)w);
3917 ev_stop (EV_A_ (W)w);
3918
3919 if (!signals [w->signum - 1].head)
3920 {
3921#if EV_MULTIPLICITY
3922 signals [w->signum - 1].loop = 0; /* unattach from signal */
3923#endif
3924#if EV_USE_SIGNALFD
3925 if (sigfd >= 0)
3926 {
3927 sigset_t ss;
3928
3929 sigemptyset (&ss);
3930 sigaddset (&ss, w->signum);
3931 sigdelset (&sigfd_set, w->signum);
3932
3933 signalfd (sigfd, &sigfd_set, 0);
3934 sigprocmask (SIG_UNBLOCK, &ss, 0);
3935 }
3936 else
3937#endif
3938 signal (w->signum, SIG_DFL);
3939 }
3940
3941 EV_FREQUENT_CHECK;
3942}
3943
3944#endif
3945
3946#if EV_CHILD_ENABLE
3947
1232void 3948void
1233ev_signal_start (EV_P_ struct ev_signal *w) 3949ev_child_start (EV_P_ ev_child *w) EV_THROW
1234{ 3950{
1235#if EV_MULTIPLICITY 3951#if EV_MULTIPLICITY
1236 assert (("signal watchers are only supported in the default loop", loop == default_loop)); 3952 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1237#endif 3953#endif
1238 if (ev_is_active (w)) 3954 if (expect_false (ev_is_active (w)))
1239 return; 3955 return;
1240 3956
1241 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3957 EV_FREQUENT_CHECK;
1242 3958
1243 ev_start (EV_A_ (W)w, 1); 3959 ev_start (EV_A_ (W)w, 1);
1244 array_needsize (signals, signalmax, w->signum, signals_init); 3960 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1245 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1246 3961
1247 if (!w->next) 3962 EV_FREQUENT_CHECK;
1248 {
1249 struct sigaction sa;
1250 sa.sa_handler = sighandler;
1251 sigfillset (&sa.sa_mask);
1252 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1253 sigaction (w->signum, &sa, 0);
1254 }
1255} 3963}
1256 3964
1257void 3965void
1258ev_signal_stop (EV_P_ struct ev_signal *w) 3966ev_child_stop (EV_P_ ev_child *w) EV_THROW
1259{ 3967{
1260 ev_clear_pending (EV_A_ (W)w); 3968 clear_pending (EV_A_ (W)w);
1261 if (!ev_is_active (w)) 3969 if (expect_false (!ev_is_active (w)))
1262 return; 3970 return;
1263 3971
1264 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w); 3972 EV_FREQUENT_CHECK;
3973
3974 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1265 ev_stop (EV_A_ (W)w); 3975 ev_stop (EV_A_ (W)w);
1266 3976
1267 if (!signals [w->signum - 1].head) 3977 EV_FREQUENT_CHECK;
1268 signal (w->signum, SIG_DFL);
1269} 3978}
3979
3980#endif
3981
3982#if EV_STAT_ENABLE
3983
3984# ifdef _WIN32
3985# undef lstat
3986# define lstat(a,b) _stati64 (a,b)
3987# endif
3988
3989#define DEF_STAT_INTERVAL 5.0074891
3990#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3991#define MIN_STAT_INTERVAL 0.1074891
3992
3993static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3994
3995#if EV_USE_INOTIFY
3996
3997/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3998# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3999
4000static void noinline
4001infy_add (EV_P_ ev_stat *w)
4002{
4003 w->wd = inotify_add_watch (fs_fd, w->path,
4004 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4005 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4006 | IN_DONT_FOLLOW | IN_MASK_ADD);
4007
4008 if (w->wd >= 0)
4009 {
4010 struct statfs sfs;
4011
4012 /* now local changes will be tracked by inotify, but remote changes won't */
4013 /* unless the filesystem is known to be local, we therefore still poll */
4014 /* also do poll on <2.6.25, but with normal frequency */
4015
4016 if (!fs_2625)
4017 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4018 else if (!statfs (w->path, &sfs)
4019 && (sfs.f_type == 0x1373 /* devfs */
4020 || sfs.f_type == 0x4006 /* fat */
4021 || sfs.f_type == 0x4d44 /* msdos */
4022 || sfs.f_type == 0xEF53 /* ext2/3 */
4023 || sfs.f_type == 0x72b6 /* jffs2 */
4024 || sfs.f_type == 0x858458f6 /* ramfs */
4025 || sfs.f_type == 0x5346544e /* ntfs */
4026 || sfs.f_type == 0x3153464a /* jfs */
4027 || sfs.f_type == 0x9123683e /* btrfs */
4028 || sfs.f_type == 0x52654973 /* reiser3 */
4029 || sfs.f_type == 0x01021994 /* tmpfs */
4030 || sfs.f_type == 0x58465342 /* xfs */))
4031 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4032 else
4033 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
4034 }
4035 else
4036 {
4037 /* can't use inotify, continue to stat */
4038 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4039
4040 /* if path is not there, monitor some parent directory for speedup hints */
4041 /* note that exceeding the hardcoded path limit is not a correctness issue, */
4042 /* but an efficiency issue only */
4043 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
4044 {
4045 char path [4096];
4046 strcpy (path, w->path);
4047
4048 do
4049 {
4050 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
4051 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
4052
4053 char *pend = strrchr (path, '/');
4054
4055 if (!pend || pend == path)
4056 break;
4057
4058 *pend = 0;
4059 w->wd = inotify_add_watch (fs_fd, path, mask);
4060 }
4061 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
4062 }
4063 }
4064
4065 if (w->wd >= 0)
4066 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4067
4068 /* now re-arm timer, if required */
4069 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4070 ev_timer_again (EV_A_ &w->timer);
4071 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4072}
4073
4074static void noinline
4075infy_del (EV_P_ ev_stat *w)
4076{
4077 int slot;
4078 int wd = w->wd;
4079
4080 if (wd < 0)
4081 return;
4082
4083 w->wd = -2;
4084 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
4085 wlist_del (&fs_hash [slot].head, (WL)w);
4086
4087 /* remove this watcher, if others are watching it, they will rearm */
4088 inotify_rm_watch (fs_fd, wd);
4089}
4090
4091static void noinline
4092infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
4093{
4094 if (slot < 0)
4095 /* overflow, need to check for all hash slots */
4096 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
4097 infy_wd (EV_A_ slot, wd, ev);
4098 else
4099 {
4100 WL w_;
4101
4102 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
4103 {
4104 ev_stat *w = (ev_stat *)w_;
4105 w_ = w_->next; /* lets us remove this watcher and all before it */
4106
4107 if (w->wd == wd || wd == -1)
4108 {
4109 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
4110 {
4111 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4112 w->wd = -1;
4113 infy_add (EV_A_ w); /* re-add, no matter what */
4114 }
4115
4116 stat_timer_cb (EV_A_ &w->timer, 0);
4117 }
4118 }
4119 }
4120}
4121
4122static void
4123infy_cb (EV_P_ ev_io *w, int revents)
4124{
4125 char buf [EV_INOTIFY_BUFSIZE];
4126 int ofs;
4127 int len = read (fs_fd, buf, sizeof (buf));
4128
4129 for (ofs = 0; ofs < len; )
4130 {
4131 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
4132 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4133 ofs += sizeof (struct inotify_event) + ev->len;
4134 }
4135}
4136
4137inline_size void ecb_cold
4138ev_check_2625 (EV_P)
4139{
4140 /* kernels < 2.6.25 are borked
4141 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4142 */
4143 if (ev_linux_version () < 0x020619)
4144 return;
4145
4146 fs_2625 = 1;
4147}
4148
4149inline_size int
4150infy_newfd (void)
4151{
4152#if defined IN_CLOEXEC && defined IN_NONBLOCK
4153 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4154 if (fd >= 0)
4155 return fd;
4156#endif
4157 return inotify_init ();
4158}
4159
4160inline_size void
4161infy_init (EV_P)
4162{
4163 if (fs_fd != -2)
4164 return;
4165
4166 fs_fd = -1;
4167
4168 ev_check_2625 (EV_A);
4169
4170 fs_fd = infy_newfd ();
4171
4172 if (fs_fd >= 0)
4173 {
4174 fd_intern (fs_fd);
4175 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
4176 ev_set_priority (&fs_w, EV_MAXPRI);
4177 ev_io_start (EV_A_ &fs_w);
4178 ev_unref (EV_A);
4179 }
4180}
4181
4182inline_size void
4183infy_fork (EV_P)
4184{
4185 int slot;
4186
4187 if (fs_fd < 0)
4188 return;
4189
4190 ev_ref (EV_A);
4191 ev_io_stop (EV_A_ &fs_w);
4192 close (fs_fd);
4193 fs_fd = infy_newfd ();
4194
4195 if (fs_fd >= 0)
4196 {
4197 fd_intern (fs_fd);
4198 ev_io_set (&fs_w, fs_fd, EV_READ);
4199 ev_io_start (EV_A_ &fs_w);
4200 ev_unref (EV_A);
4201 }
4202
4203 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
4204 {
4205 WL w_ = fs_hash [slot].head;
4206 fs_hash [slot].head = 0;
4207
4208 while (w_)
4209 {
4210 ev_stat *w = (ev_stat *)w_;
4211 w_ = w_->next; /* lets us add this watcher */
4212
4213 w->wd = -1;
4214
4215 if (fs_fd >= 0)
4216 infy_add (EV_A_ w); /* re-add, no matter what */
4217 else
4218 {
4219 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4220 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4221 ev_timer_again (EV_A_ &w->timer);
4222 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4223 }
4224 }
4225 }
4226}
4227
4228#endif
4229
4230#ifdef _WIN32
4231# define EV_LSTAT(p,b) _stati64 (p, b)
4232#else
4233# define EV_LSTAT(p,b) lstat (p, b)
4234#endif
1270 4235
1271void 4236void
1272ev_child_start (EV_P_ struct ev_child *w) 4237ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
1273{ 4238{
1274#if EV_MULTIPLICITY 4239 if (lstat (w->path, &w->attr) < 0)
1275 assert (("child watchers are only supported in the default loop", loop == default_loop)); 4240 w->attr.st_nlink = 0;
1276#endif 4241 else if (!w->attr.st_nlink)
4242 w->attr.st_nlink = 1;
4243}
4244
4245static void noinline
4246stat_timer_cb (EV_P_ ev_timer *w_, int revents)
4247{
4248 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
4249
4250 ev_statdata prev = w->attr;
4251 ev_stat_stat (EV_A_ w);
4252
4253 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
4254 if (
4255 prev.st_dev != w->attr.st_dev
4256 || prev.st_ino != w->attr.st_ino
4257 || prev.st_mode != w->attr.st_mode
4258 || prev.st_nlink != w->attr.st_nlink
4259 || prev.st_uid != w->attr.st_uid
4260 || prev.st_gid != w->attr.st_gid
4261 || prev.st_rdev != w->attr.st_rdev
4262 || prev.st_size != w->attr.st_size
4263 || prev.st_atime != w->attr.st_atime
4264 || prev.st_mtime != w->attr.st_mtime
4265 || prev.st_ctime != w->attr.st_ctime
4266 ) {
4267 /* we only update w->prev on actual differences */
4268 /* in case we test more often than invoke the callback, */
4269 /* to ensure that prev is always different to attr */
4270 w->prev = prev;
4271
4272 #if EV_USE_INOTIFY
4273 if (fs_fd >= 0)
4274 {
4275 infy_del (EV_A_ w);
4276 infy_add (EV_A_ w);
4277 ev_stat_stat (EV_A_ w); /* avoid race... */
4278 }
4279 #endif
4280
4281 ev_feed_event (EV_A_ w, EV_STAT);
4282 }
4283}
4284
4285void
4286ev_stat_start (EV_P_ ev_stat *w) EV_THROW
4287{
1277 if (ev_is_active (w)) 4288 if (expect_false (ev_is_active (w)))
1278 return; 4289 return;
1279 4290
4291 ev_stat_stat (EV_A_ w);
4292
4293 if (w->interval < MIN_STAT_INTERVAL && w->interval)
4294 w->interval = MIN_STAT_INTERVAL;
4295
4296 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
4297 ev_set_priority (&w->timer, ev_priority (w));
4298
4299#if EV_USE_INOTIFY
4300 infy_init (EV_A);
4301
4302 if (fs_fd >= 0)
4303 infy_add (EV_A_ w);
4304 else
4305#endif
4306 {
4307 ev_timer_again (EV_A_ &w->timer);
4308 ev_unref (EV_A);
4309 }
4310
1280 ev_start (EV_A_ (W)w, 1); 4311 ev_start (EV_A_ (W)w, 1);
1281 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 4312
4313 EV_FREQUENT_CHECK;
1282} 4314}
1283 4315
1284void 4316void
1285ev_child_stop (EV_P_ struct ev_child *w) 4317ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
1286{ 4318{
1287 ev_clear_pending (EV_A_ (W)w); 4319 clear_pending (EV_A_ (W)w);
1288 if (ev_is_active (w)) 4320 if (expect_false (!ev_is_active (w)))
1289 return; 4321 return;
1290 4322
1291 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w); 4323 EV_FREQUENT_CHECK;
4324
4325#if EV_USE_INOTIFY
4326 infy_del (EV_A_ w);
4327#endif
4328
4329 if (ev_is_active (&w->timer))
4330 {
4331 ev_ref (EV_A);
4332 ev_timer_stop (EV_A_ &w->timer);
4333 }
4334
1292 ev_stop (EV_A_ (W)w); 4335 ev_stop (EV_A_ (W)w);
4336
4337 EV_FREQUENT_CHECK;
1293} 4338}
4339#endif
4340
4341#if EV_IDLE_ENABLE
4342void
4343ev_idle_start (EV_P_ ev_idle *w) EV_THROW
4344{
4345 if (expect_false (ev_is_active (w)))
4346 return;
4347
4348 pri_adjust (EV_A_ (W)w);
4349
4350 EV_FREQUENT_CHECK;
4351
4352 {
4353 int active = ++idlecnt [ABSPRI (w)];
4354
4355 ++idleall;
4356 ev_start (EV_A_ (W)w, active);
4357
4358 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
4359 idles [ABSPRI (w)][active - 1] = w;
4360 }
4361
4362 EV_FREQUENT_CHECK;
4363}
4364
4365void
4366ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
4367{
4368 clear_pending (EV_A_ (W)w);
4369 if (expect_false (!ev_is_active (w)))
4370 return;
4371
4372 EV_FREQUENT_CHECK;
4373
4374 {
4375 int active = ev_active (w);
4376
4377 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
4378 ev_active (idles [ABSPRI (w)][active - 1]) = active;
4379
4380 ev_stop (EV_A_ (W)w);
4381 --idleall;
4382 }
4383
4384 EV_FREQUENT_CHECK;
4385}
4386#endif
4387
4388#if EV_PREPARE_ENABLE
4389void
4390ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
4391{
4392 if (expect_false (ev_is_active (w)))
4393 return;
4394
4395 EV_FREQUENT_CHECK;
4396
4397 ev_start (EV_A_ (W)w, ++preparecnt);
4398 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
4399 prepares [preparecnt - 1] = w;
4400
4401 EV_FREQUENT_CHECK;
4402}
4403
4404void
4405ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
4406{
4407 clear_pending (EV_A_ (W)w);
4408 if (expect_false (!ev_is_active (w)))
4409 return;
4410
4411 EV_FREQUENT_CHECK;
4412
4413 {
4414 int active = ev_active (w);
4415
4416 prepares [active - 1] = prepares [--preparecnt];
4417 ev_active (prepares [active - 1]) = active;
4418 }
4419
4420 ev_stop (EV_A_ (W)w);
4421
4422 EV_FREQUENT_CHECK;
4423}
4424#endif
4425
4426#if EV_CHECK_ENABLE
4427void
4428ev_check_start (EV_P_ ev_check *w) EV_THROW
4429{
4430 if (expect_false (ev_is_active (w)))
4431 return;
4432
4433 EV_FREQUENT_CHECK;
4434
4435 ev_start (EV_A_ (W)w, ++checkcnt);
4436 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
4437 checks [checkcnt - 1] = w;
4438
4439 EV_FREQUENT_CHECK;
4440}
4441
4442void
4443ev_check_stop (EV_P_ ev_check *w) EV_THROW
4444{
4445 clear_pending (EV_A_ (W)w);
4446 if (expect_false (!ev_is_active (w)))
4447 return;
4448
4449 EV_FREQUENT_CHECK;
4450
4451 {
4452 int active = ev_active (w);
4453
4454 checks [active - 1] = checks [--checkcnt];
4455 ev_active (checks [active - 1]) = active;
4456 }
4457
4458 ev_stop (EV_A_ (W)w);
4459
4460 EV_FREQUENT_CHECK;
4461}
4462#endif
4463
4464#if EV_EMBED_ENABLE
4465void noinline
4466ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
4467{
4468 ev_run (w->other, EVRUN_NOWAIT);
4469}
4470
4471static void
4472embed_io_cb (EV_P_ ev_io *io, int revents)
4473{
4474 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
4475
4476 if (ev_cb (w))
4477 ev_feed_event (EV_A_ (W)w, EV_EMBED);
4478 else
4479 ev_run (w->other, EVRUN_NOWAIT);
4480}
4481
4482static void
4483embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4484{
4485 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4486
4487 {
4488 EV_P = w->other;
4489
4490 while (fdchangecnt)
4491 {
4492 fd_reify (EV_A);
4493 ev_run (EV_A_ EVRUN_NOWAIT);
4494 }
4495 }
4496}
4497
4498static void
4499embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4500{
4501 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4502
4503 ev_embed_stop (EV_A_ w);
4504
4505 {
4506 EV_P = w->other;
4507
4508 ev_loop_fork (EV_A);
4509 ev_run (EV_A_ EVRUN_NOWAIT);
4510 }
4511
4512 ev_embed_start (EV_A_ w);
4513}
4514
4515#if 0
4516static void
4517embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4518{
4519 ev_idle_stop (EV_A_ idle);
4520}
4521#endif
4522
4523void
4524ev_embed_start (EV_P_ ev_embed *w) EV_THROW
4525{
4526 if (expect_false (ev_is_active (w)))
4527 return;
4528
4529 {
4530 EV_P = w->other;
4531 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4532 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4533 }
4534
4535 EV_FREQUENT_CHECK;
4536
4537 ev_set_priority (&w->io, ev_priority (w));
4538 ev_io_start (EV_A_ &w->io);
4539
4540 ev_prepare_init (&w->prepare, embed_prepare_cb);
4541 ev_set_priority (&w->prepare, EV_MINPRI);
4542 ev_prepare_start (EV_A_ &w->prepare);
4543
4544 ev_fork_init (&w->fork, embed_fork_cb);
4545 ev_fork_start (EV_A_ &w->fork);
4546
4547 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4548
4549 ev_start (EV_A_ (W)w, 1);
4550
4551 EV_FREQUENT_CHECK;
4552}
4553
4554void
4555ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
4556{
4557 clear_pending (EV_A_ (W)w);
4558 if (expect_false (!ev_is_active (w)))
4559 return;
4560
4561 EV_FREQUENT_CHECK;
4562
4563 ev_io_stop (EV_A_ &w->io);
4564 ev_prepare_stop (EV_A_ &w->prepare);
4565 ev_fork_stop (EV_A_ &w->fork);
4566
4567 ev_stop (EV_A_ (W)w);
4568
4569 EV_FREQUENT_CHECK;
4570}
4571#endif
4572
4573#if EV_FORK_ENABLE
4574void
4575ev_fork_start (EV_P_ ev_fork *w) EV_THROW
4576{
4577 if (expect_false (ev_is_active (w)))
4578 return;
4579
4580 EV_FREQUENT_CHECK;
4581
4582 ev_start (EV_A_ (W)w, ++forkcnt);
4583 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4584 forks [forkcnt - 1] = w;
4585
4586 EV_FREQUENT_CHECK;
4587}
4588
4589void
4590ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
4591{
4592 clear_pending (EV_A_ (W)w);
4593 if (expect_false (!ev_is_active (w)))
4594 return;
4595
4596 EV_FREQUENT_CHECK;
4597
4598 {
4599 int active = ev_active (w);
4600
4601 forks [active - 1] = forks [--forkcnt];
4602 ev_active (forks [active - 1]) = active;
4603 }
4604
4605 ev_stop (EV_A_ (W)w);
4606
4607 EV_FREQUENT_CHECK;
4608}
4609#endif
4610
4611#if EV_CLEANUP_ENABLE
4612void
4613ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4614{
4615 if (expect_false (ev_is_active (w)))
4616 return;
4617
4618 EV_FREQUENT_CHECK;
4619
4620 ev_start (EV_A_ (W)w, ++cleanupcnt);
4621 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4622 cleanups [cleanupcnt - 1] = w;
4623
4624 /* cleanup watchers should never keep a refcount on the loop */
4625 ev_unref (EV_A);
4626 EV_FREQUENT_CHECK;
4627}
4628
4629void
4630ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4631{
4632 clear_pending (EV_A_ (W)w);
4633 if (expect_false (!ev_is_active (w)))
4634 return;
4635
4636 EV_FREQUENT_CHECK;
4637 ev_ref (EV_A);
4638
4639 {
4640 int active = ev_active (w);
4641
4642 cleanups [active - 1] = cleanups [--cleanupcnt];
4643 ev_active (cleanups [active - 1]) = active;
4644 }
4645
4646 ev_stop (EV_A_ (W)w);
4647
4648 EV_FREQUENT_CHECK;
4649}
4650#endif
4651
4652#if EV_ASYNC_ENABLE
4653void
4654ev_async_start (EV_P_ ev_async *w) EV_THROW
4655{
4656 if (expect_false (ev_is_active (w)))
4657 return;
4658
4659 w->sent = 0;
4660
4661 evpipe_init (EV_A);
4662
4663 EV_FREQUENT_CHECK;
4664
4665 ev_start (EV_A_ (W)w, ++asynccnt);
4666 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4667 asyncs [asynccnt - 1] = w;
4668
4669 EV_FREQUENT_CHECK;
4670}
4671
4672void
4673ev_async_stop (EV_P_ ev_async *w) EV_THROW
4674{
4675 clear_pending (EV_A_ (W)w);
4676 if (expect_false (!ev_is_active (w)))
4677 return;
4678
4679 EV_FREQUENT_CHECK;
4680
4681 {
4682 int active = ev_active (w);
4683
4684 asyncs [active - 1] = asyncs [--asynccnt];
4685 ev_active (asyncs [active - 1]) = active;
4686 }
4687
4688 ev_stop (EV_A_ (W)w);
4689
4690 EV_FREQUENT_CHECK;
4691}
4692
4693void
4694ev_async_send (EV_P_ ev_async *w) EV_THROW
4695{
4696 w->sent = 1;
4697 evpipe_write (EV_A_ &async_pending);
4698}
4699#endif
1294 4700
1295/*****************************************************************************/ 4701/*****************************************************************************/
1296 4702
1297struct ev_once 4703struct ev_once
1298{ 4704{
1299 struct ev_io io; 4705 ev_io io;
1300 struct ev_timer to; 4706 ev_timer to;
1301 void (*cb)(int revents, void *arg); 4707 void (*cb)(int revents, void *arg);
1302 void *arg; 4708 void *arg;
1303}; 4709};
1304 4710
1305static void 4711static void
1306once_cb (EV_P_ struct ev_once *once, int revents) 4712once_cb (EV_P_ struct ev_once *once, int revents)
1307{ 4713{
1308 void (*cb)(int revents, void *arg) = once->cb; 4714 void (*cb)(int revents, void *arg) = once->cb;
1309 void *arg = once->arg; 4715 void *arg = once->arg;
1310 4716
1311 ev_io_stop (EV_A_ &once->io); 4717 ev_io_stop (EV_A_ &once->io);
1312 ev_timer_stop (EV_A_ &once->to); 4718 ev_timer_stop (EV_A_ &once->to);
1313 free (once); 4719 ev_free (once);
1314 4720
1315 cb (revents, arg); 4721 cb (revents, arg);
1316} 4722}
1317 4723
1318static void 4724static void
1319once_cb_io (EV_P_ struct ev_io *w, int revents) 4725once_cb_io (EV_P_ ev_io *w, int revents)
1320{ 4726{
1321 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4727 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4728
4729 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1322} 4730}
1323 4731
1324static void 4732static void
1325once_cb_to (EV_P_ struct ev_timer *w, int revents) 4733once_cb_to (EV_P_ ev_timer *w, int revents)
1326{ 4734{
1327 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4735 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4736
4737 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1328} 4738}
1329 4739
1330void 4740void
1331ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4741ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
1332{ 4742{
1333 struct ev_once *once = malloc (sizeof (struct ev_once)); 4743 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1334 4744
1335 if (!once) 4745 if (expect_false (!once))
4746 {
1336 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4747 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1337 else 4748 return;
1338 { 4749 }
4750
1339 once->cb = cb; 4751 once->cb = cb;
1340 once->arg = arg; 4752 once->arg = arg;
1341 4753
1342 ev_watcher_init (&once->io, once_cb_io); 4754 ev_init (&once->io, once_cb_io);
1343 if (fd >= 0) 4755 if (fd >= 0)
4756 {
4757 ev_io_set (&once->io, fd, events);
4758 ev_io_start (EV_A_ &once->io);
4759 }
4760
4761 ev_init (&once->to, once_cb_to);
4762 if (timeout >= 0.)
4763 {
4764 ev_timer_set (&once->to, timeout, 0.);
4765 ev_timer_start (EV_A_ &once->to);
4766 }
4767}
4768
4769/*****************************************************************************/
4770
4771#if EV_WALK_ENABLE
4772void ecb_cold
4773ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4774{
4775 int i, j;
4776 ev_watcher_list *wl, *wn;
4777
4778 if (types & (EV_IO | EV_EMBED))
4779 for (i = 0; i < anfdmax; ++i)
4780 for (wl = anfds [i].head; wl; )
1344 { 4781 {
1345 ev_io_set (&once->io, fd, events); 4782 wn = wl->next;
1346 ev_io_start (EV_A_ &once->io); 4783
4784#if EV_EMBED_ENABLE
4785 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4786 {
4787 if (types & EV_EMBED)
4788 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4789 }
4790 else
4791#endif
4792#if EV_USE_INOTIFY
4793 if (ev_cb ((ev_io *)wl) == infy_cb)
4794 ;
4795 else
4796#endif
4797 if ((ev_io *)wl != &pipe_w)
4798 if (types & EV_IO)
4799 cb (EV_A_ EV_IO, wl);
4800
4801 wl = wn;
1347 } 4802 }
1348 4803
1349 ev_watcher_init (&once->to, once_cb_to); 4804 if (types & (EV_TIMER | EV_STAT))
1350 if (timeout >= 0.) 4805 for (i = timercnt + HEAP0; i-- > HEAP0; )
4806#if EV_STAT_ENABLE
4807 /*TODO: timer is not always active*/
4808 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1351 { 4809 {
1352 ev_timer_set (&once->to, timeout, 0.); 4810 if (types & EV_STAT)
1353 ev_timer_start (EV_A_ &once->to); 4811 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1354 } 4812 }
1355 } 4813 else
1356} 4814#endif
4815 if (types & EV_TIMER)
4816 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1357 4817
4818#if EV_PERIODIC_ENABLE
4819 if (types & EV_PERIODIC)
4820 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4821 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4822#endif
4823
4824#if EV_IDLE_ENABLE
4825 if (types & EV_IDLE)
4826 for (j = NUMPRI; j--; )
4827 for (i = idlecnt [j]; i--; )
4828 cb (EV_A_ EV_IDLE, idles [j][i]);
4829#endif
4830
4831#if EV_FORK_ENABLE
4832 if (types & EV_FORK)
4833 for (i = forkcnt; i--; )
4834 if (ev_cb (forks [i]) != embed_fork_cb)
4835 cb (EV_A_ EV_FORK, forks [i]);
4836#endif
4837
4838#if EV_ASYNC_ENABLE
4839 if (types & EV_ASYNC)
4840 for (i = asynccnt; i--; )
4841 cb (EV_A_ EV_ASYNC, asyncs [i]);
4842#endif
4843
4844#if EV_PREPARE_ENABLE
4845 if (types & EV_PREPARE)
4846 for (i = preparecnt; i--; )
4847# if EV_EMBED_ENABLE
4848 if (ev_cb (prepares [i]) != embed_prepare_cb)
4849# endif
4850 cb (EV_A_ EV_PREPARE, prepares [i]);
4851#endif
4852
4853#if EV_CHECK_ENABLE
4854 if (types & EV_CHECK)
4855 for (i = checkcnt; i--; )
4856 cb (EV_A_ EV_CHECK, checks [i]);
4857#endif
4858
4859#if EV_SIGNAL_ENABLE
4860 if (types & EV_SIGNAL)
4861 for (i = 0; i < EV_NSIG - 1; ++i)
4862 for (wl = signals [i].head; wl; )
4863 {
4864 wn = wl->next;
4865 cb (EV_A_ EV_SIGNAL, wl);
4866 wl = wn;
4867 }
4868#endif
4869
4870#if EV_CHILD_ENABLE
4871 if (types & EV_CHILD)
4872 for (i = (EV_PID_HASHSIZE); i--; )
4873 for (wl = childs [i]; wl; )
4874 {
4875 wn = wl->next;
4876 cb (EV_A_ EV_CHILD, wl);
4877 wl = wn;
4878 }
4879#endif
4880/* EV_STAT 0x00001000 /* stat data changed */
4881/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4882}
4883#endif
4884
4885#if EV_MULTIPLICITY
4886 #include "ev_wrap.h"
4887#endif
4888

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