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Comparing libev/ev.c (file contents):
Revision 1.28 by root, Thu Nov 1 06:48:49 2007 UTC vs.
Revision 1.428 by root, Tue May 8 15:44:09 2012 UTC

1/* 1/*
2 * libev event processing core, watcher management
3 *
2 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann <libev@schmorp.de>
3 * All rights reserved. 5 * All rights reserved.
4 * 6 *
5 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
6 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
7 * met:
8 * 9 *
9 * * Redistributions of source code must retain the above copyright 10 * 1. Redistributions of source code must retain the above copyright notice,
10 * notice, this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
11 * 12 *
12 * * Redistributions in binary form must reproduce the above 13 * 2. Redistributions in binary form must reproduce the above copyright
13 * copyright notice, this list of conditions and the following 14 * notice, this list of conditions and the following disclaimer in the
14 * disclaimer in the documentation and/or other materials provided 15 * documentation and/or other materials provided with the distribution.
15 * with the distribution.
16 * 16 *
17 * 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
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
26 * (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
27 * 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.
28 */ 38 */
29 39
30#include <math.h> 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
45# include "config.h"
46# endif
47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined EV_USE_CLOCK_SYSCALL
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
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
31#include <stdlib.h> 167#include <stdlib.h>
32#include <unistd.h> 168#include <string.h>
33#include <fcntl.h> 169#include <fcntl.h>
34#include <signal.h>
35#include <stddef.h> 170#include <stddef.h>
36 171
37#include <stdio.h> 172#include <stdio.h>
38 173
39#include <assert.h> 174#include <assert.h>
40#include <errno.h> 175#include <errno.h>
41#include <sys/types.h> 176#include <sys/types.h>
42#include <sys/wait.h>
43#include <sys/time.h>
44#include <time.h> 177#include <time.h>
178#include <limits.h>
45 179
46#ifndef HAVE_MONOTONIC 180#include <signal.h>
47# ifdef CLOCK_MONOTONIC 181
48# define HAVE_MONOTONIC 1 182#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
199#ifndef _WIN32
200# include <sys/time.h>
201# include <sys/wait.h>
202# include <unistd.h>
203#else
204# include <io.h>
205# define WIN32_LEAN_AND_MEAN
206# include <windows.h>
207# include <winsock2.h>
208# ifndef EV_SELECT_IS_WINSOCKET
209# define EV_SELECT_IS_WINSOCKET 1
49# endif 210# endif
211# undef EV_AVOID_STDIO
212#endif
213
214/* OS X, in its infinite idiocy, actually HARDCODES
215 * a limit of 1024 into their select. Where people have brains,
216 * OS X engineers apparently have a vacuum. Or maybe they were
217 * ordered to have a vacuum, or they do anything for money.
218 * This might help. Or not.
219 */
220#define _DARWIN_UNLIMITED_SELECT 1
221
222/* this block tries to deduce configuration from header-defined symbols and defaults */
223
224/* try to deduce the maximum number of signals on this platform */
225#if defined EV_NSIG
226/* use what's provided */
227#elif defined NSIG
228# define EV_NSIG (NSIG)
229#elif defined _NSIG
230# define EV_NSIG (_NSIG)
231#elif defined SIGMAX
232# define EV_NSIG (SIGMAX+1)
233#elif defined SIG_MAX
234# define EV_NSIG (SIG_MAX+1)
235#elif defined _SIG_MAX
236# define EV_NSIG (_SIG_MAX+1)
237#elif defined MAXSIG
238# define EV_NSIG (MAXSIG+1)
239#elif defined MAX_SIG
240# define EV_NSIG (MAX_SIG+1)
241#elif defined SIGARRAYSIZE
242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
243#elif defined _sys_nsig
244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
245#else
246# error "unable to find value for NSIG, please report"
247/* to make it compile regardless, just remove the above line, */
248/* but consider reporting it, too! :) */
249# define EV_NSIG 65
250#endif
251
252#ifndef EV_USE_FLOOR
253# define EV_USE_FLOOR 0
254#endif
255
256#ifndef EV_USE_CLOCK_SYSCALL
257# if __linux && __GLIBC__ >= 2
258# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
259# else
260# define EV_USE_CLOCK_SYSCALL 0
50#endif 261# endif
262#endif
51 263
52#ifndef HAVE_SELECT 264#ifndef EV_USE_MONOTONIC
53# define HAVE_SELECT 1 265# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
266# define EV_USE_MONOTONIC EV_FEATURE_OS
267# else
268# define EV_USE_MONOTONIC 0
54#endif 269# endif
270#endif
55 271
56#ifndef HAVE_EPOLL 272#ifndef EV_USE_REALTIME
57# define HAVE_EPOLL 0 273# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
274#endif
275
276#ifndef EV_USE_NANOSLEEP
277# if _POSIX_C_SOURCE >= 199309L
278# define EV_USE_NANOSLEEP EV_FEATURE_OS
279# else
280# define EV_USE_NANOSLEEP 0
58#endif 281# endif
282#endif
59 283
60#ifndef HAVE_REALTIME 284#ifndef EV_USE_SELECT
61# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ 285# define EV_USE_SELECT EV_FEATURE_BACKENDS
286#endif
287
288#ifndef EV_USE_POLL
289# ifdef _WIN32
290# define EV_USE_POLL 0
291# else
292# define EV_USE_POLL EV_FEATURE_BACKENDS
62#endif 293# endif
294#endif
295
296#ifndef EV_USE_EPOLL
297# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
298# define EV_USE_EPOLL EV_FEATURE_BACKENDS
299# else
300# define EV_USE_EPOLL 0
301# endif
302#endif
303
304#ifndef EV_USE_KQUEUE
305# define EV_USE_KQUEUE 0
306#endif
307
308#ifndef EV_USE_PORT
309# define EV_USE_PORT 0
310#endif
311
312#ifndef EV_USE_INOTIFY
313# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
314# define EV_USE_INOTIFY EV_FEATURE_OS
315# else
316# define EV_USE_INOTIFY 0
317# endif
318#endif
319
320#ifndef EV_PID_HASHSIZE
321# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
322#endif
323
324#ifndef EV_INOTIFY_HASHSIZE
325# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
326#endif
327
328#ifndef EV_USE_EVENTFD
329# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
330# define EV_USE_EVENTFD EV_FEATURE_OS
331# else
332# define EV_USE_EVENTFD 0
333# endif
334#endif
335
336#ifndef EV_USE_SIGNALFD
337# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
338# define EV_USE_SIGNALFD EV_FEATURE_OS
339# else
340# define EV_USE_SIGNALFD 0
341# endif
342#endif
343
344#if 0 /* debugging */
345# define EV_VERIFY 3
346# define EV_USE_4HEAP 1
347# define EV_HEAP_CACHE_AT 1
348#endif
349
350#ifndef EV_VERIFY
351# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
352#endif
353
354#ifndef EV_USE_4HEAP
355# define EV_USE_4HEAP EV_FEATURE_DATA
356#endif
357
358#ifndef EV_HEAP_CACHE_AT
359# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
360#endif
361
362/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
363/* which makes programs even slower. might work on other unices, too. */
364#if EV_USE_CLOCK_SYSCALL
365# include <sys/syscall.h>
366# ifdef SYS_clock_gettime
367# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
368# undef EV_USE_MONOTONIC
369# define EV_USE_MONOTONIC 1
370# else
371# undef EV_USE_CLOCK_SYSCALL
372# define EV_USE_CLOCK_SYSCALL 0
373# endif
374#endif
375
376/* this block fixes any misconfiguration where we know we run into trouble otherwise */
377
378#ifdef _AIX
379/* AIX has a completely broken poll.h header */
380# undef EV_USE_POLL
381# define EV_USE_POLL 0
382#endif
383
384#ifndef CLOCK_MONOTONIC
385# undef EV_USE_MONOTONIC
386# define EV_USE_MONOTONIC 0
387#endif
388
389#ifndef CLOCK_REALTIME
390# undef EV_USE_REALTIME
391# define EV_USE_REALTIME 0
392#endif
393
394#if !EV_STAT_ENABLE
395# undef EV_USE_INOTIFY
396# define EV_USE_INOTIFY 0
397#endif
398
399#if !EV_USE_NANOSLEEP
400/* hp-ux has it in sys/time.h, which we unconditionally include above */
401# if !defined _WIN32 && !defined __hpux
402# include <sys/select.h>
403# endif
404#endif
405
406#if EV_USE_INOTIFY
407# include <sys/statfs.h>
408# include <sys/inotify.h>
409/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
410# ifndef IN_DONT_FOLLOW
411# undef EV_USE_INOTIFY
412# define EV_USE_INOTIFY 0
413# endif
414#endif
415
416#if EV_SELECT_IS_WINSOCKET
417# include <winsock.h>
418#endif
419
420#if EV_USE_EVENTFD
421/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
422# include <stdint.h>
423# ifndef EFD_NONBLOCK
424# define EFD_NONBLOCK O_NONBLOCK
425# endif
426# ifndef EFD_CLOEXEC
427# ifdef O_CLOEXEC
428# define EFD_CLOEXEC O_CLOEXEC
429# else
430# define EFD_CLOEXEC 02000000
431# endif
432# endif
433EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
434#endif
435
436#if EV_USE_SIGNALFD
437/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
438# include <stdint.h>
439# ifndef SFD_NONBLOCK
440# define SFD_NONBLOCK O_NONBLOCK
441# endif
442# ifndef SFD_CLOEXEC
443# ifdef O_CLOEXEC
444# define SFD_CLOEXEC O_CLOEXEC
445# else
446# define SFD_CLOEXEC 02000000
447# endif
448# endif
449EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
450
451struct signalfd_siginfo
452{
453 uint32_t ssi_signo;
454 char pad[128 - sizeof (uint32_t)];
455};
456#endif
457
458/**/
459
460#if EV_VERIFY >= 3
461# define EV_FREQUENT_CHECK ev_verify (EV_A)
462#else
463# define EV_FREQUENT_CHECK do { } while (0)
464#endif
465
466/*
467 * This is used to work around floating point rounding problems.
468 * This value is good at least till the year 4000.
469 */
470#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
471/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
63 472
64#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 473#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65#define MAX_BLOCKTIME 60. 474#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
66#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */
67 475
68#include "ev.h" 476#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
477#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
69 478
70typedef struct ev_watcher *W; 479/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
71typedef struct ev_watcher_list *WL; 480/* ECB.H BEGIN */
72typedef struct ev_watcher_time *WT; 481/*
482 * libecb - http://software.schmorp.de/pkg/libecb
483 *
484 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
485 * Copyright (©) 2011 Emanuele Giaquinta
486 * All rights reserved.
487 *
488 * Redistribution and use in source and binary forms, with or without modifica-
489 * tion, are permitted provided that the following conditions are met:
490 *
491 * 1. Redistributions of source code must retain the above copyright notice,
492 * this list of conditions and the following disclaimer.
493 *
494 * 2. Redistributions in binary form must reproduce the above copyright
495 * notice, this list of conditions and the following disclaimer in the
496 * documentation and/or other materials provided with the distribution.
497 *
498 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
499 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
500 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
501 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
502 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
503 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
504 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
505 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
506 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
507 * OF THE POSSIBILITY OF SUCH DAMAGE.
508 */
73 509
74static ev_tstamp now, diff; /* monotonic clock */ 510#ifndef ECB_H
75ev_tstamp ev_now; 511#define ECB_H
76int ev_method;
77 512
78static int have_monotonic; /* runtime */ 513#ifdef _WIN32
514 typedef signed char int8_t;
515 typedef unsigned char uint8_t;
516 typedef signed short int16_t;
517 typedef unsigned short uint16_t;
518 typedef signed int int32_t;
519 typedef unsigned int uint32_t;
520 #if __GNUC__
521 typedef signed long long int64_t;
522 typedef unsigned long long uint64_t;
523 #else /* _MSC_VER || __BORLANDC__ */
524 typedef signed __int64 int64_t;
525 typedef unsigned __int64 uint64_t;
526 #endif
527#else
528 #include <inttypes.h>
529#endif
79 530
80static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 531/* many compilers define _GNUC_ to some versions but then only implement
81static void (*method_modify)(int fd, int oev, int nev); 532 * what their idiot authors think are the "more important" extensions,
82static void (*method_poll)(ev_tstamp timeout); 533 * causing enormous grief in return for some better fake benchmark numbers.
534 * or so.
535 * we try to detect these and simply assume they are not gcc - if they have
536 * an issue with that they should have done it right in the first place.
537 */
538#ifndef ECB_GCC_VERSION
539 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
540 #define ECB_GCC_VERSION(major,minor) 0
541 #else
542 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
543 #endif
544#endif
83 545
84/*****************************************************************************/ 546/*****************************************************************************/
85 547
548/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
549/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
550
551#if ECB_NO_THREADS
552# define ECB_NO_SMP 1
553#endif
554
555#if ECB_NO_THREADS || ECB_NO_SMP
556 #define ECB_MEMORY_FENCE do { } while (0)
557#endif
558
559#ifndef ECB_MEMORY_FENCE
560 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
561 #if __i386 || __i386__
562 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
563 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
564 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
565 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
566 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
567 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
568 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
569 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
570 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
571 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
572 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
573 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
574 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
575 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
576 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
577 #elif __sparc || __sparc__
578 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
579 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
580 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
581 #elif defined __s390__ || defined __s390x__
582 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
583 #elif defined __mips__
584 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
585 #elif defined __alpha__
586 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
587 #endif
588 #endif
589#endif
590
591#ifndef ECB_MEMORY_FENCE
592 #if ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
593 #define ECB_MEMORY_FENCE __sync_synchronize ()
594 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
595 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
596 #elif _MSC_VER >= 1400 /* VC++ 2005 */
597 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
598 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
599 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
600 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
601 #elif defined _WIN32
602 #include <WinNT.h>
603 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
604 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
605 #include <mbarrier.h>
606 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
607 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
608 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
609 #elif __xlC__
610 #define ECB_MEMORY_FENCE __sync ()
611 #endif
612#endif
613
614#ifndef ECB_MEMORY_FENCE
615 #if !ECB_AVOID_PTHREADS
616 /*
617 * if you get undefined symbol references to pthread_mutex_lock,
618 * or failure to find pthread.h, then you should implement
619 * the ECB_MEMORY_FENCE operations for your cpu/compiler
620 * OR provide pthread.h and link against the posix thread library
621 * of your system.
622 */
623 #include <pthread.h>
624 #define ECB_NEEDS_PTHREADS 1
625 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
626
627 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
628 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
629 #endif
630#endif
631
632#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
633 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
634#endif
635
636#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
637 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
638#endif
639
640/*****************************************************************************/
641
642#define ECB_C99 (__STDC_VERSION__ >= 199901L)
643
644#if __cplusplus
645 #define ecb_inline static inline
646#elif ECB_GCC_VERSION(2,5)
647 #define ecb_inline static __inline__
648#elif ECB_C99
649 #define ecb_inline static inline
650#else
651 #define ecb_inline static
652#endif
653
654#if ECB_GCC_VERSION(3,3)
655 #define ecb_restrict __restrict__
656#elif ECB_C99
657 #define ecb_restrict restrict
658#else
659 #define ecb_restrict
660#endif
661
662typedef int ecb_bool;
663
664#define ECB_CONCAT_(a, b) a ## b
665#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
666#define ECB_STRINGIFY_(a) # a
667#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
668
669#define ecb_function_ ecb_inline
670
671#if ECB_GCC_VERSION(3,1)
672 #define ecb_attribute(attrlist) __attribute__(attrlist)
673 #define ecb_is_constant(expr) __builtin_constant_p (expr)
674 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
675 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
676#else
677 #define ecb_attribute(attrlist)
678 #define ecb_is_constant(expr) 0
679 #define ecb_expect(expr,value) (expr)
680 #define ecb_prefetch(addr,rw,locality)
681#endif
682
683/* no emulation for ecb_decltype */
684#if ECB_GCC_VERSION(4,5)
685 #define ecb_decltype(x) __decltype(x)
686#elif ECB_GCC_VERSION(3,0)
687 #define ecb_decltype(x) __typeof(x)
688#endif
689
690#define ecb_noinline ecb_attribute ((__noinline__))
691#define ecb_noreturn ecb_attribute ((__noreturn__))
692#define ecb_unused ecb_attribute ((__unused__))
693#define ecb_const ecb_attribute ((__const__))
694#define ecb_pure ecb_attribute ((__pure__))
695
696#if ECB_GCC_VERSION(4,3)
697 #define ecb_artificial ecb_attribute ((__artificial__))
698 #define ecb_hot ecb_attribute ((__hot__))
699 #define ecb_cold ecb_attribute ((__cold__))
700#else
701 #define ecb_artificial
702 #define ecb_hot
703 #define ecb_cold
704#endif
705
706/* put around conditional expressions if you are very sure that the */
707/* expression is mostly true or mostly false. note that these return */
708/* booleans, not the expression. */
709#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
710#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
711/* for compatibility to the rest of the world */
712#define ecb_likely(expr) ecb_expect_true (expr)
713#define ecb_unlikely(expr) ecb_expect_false (expr)
714
715/* count trailing zero bits and count # of one bits */
716#if ECB_GCC_VERSION(3,4)
717 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
718 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
719 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
720 #define ecb_ctz32(x) __builtin_ctz (x)
721 #define ecb_ctz64(x) __builtin_ctzll (x)
722 #define ecb_popcount32(x) __builtin_popcount (x)
723 /* no popcountll */
724#else
725 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
726 ecb_function_ int
727 ecb_ctz32 (uint32_t x)
728 {
729 int r = 0;
730
731 x &= ~x + 1; /* this isolates the lowest bit */
732
733#if ECB_branchless_on_i386
734 r += !!(x & 0xaaaaaaaa) << 0;
735 r += !!(x & 0xcccccccc) << 1;
736 r += !!(x & 0xf0f0f0f0) << 2;
737 r += !!(x & 0xff00ff00) << 3;
738 r += !!(x & 0xffff0000) << 4;
739#else
740 if (x & 0xaaaaaaaa) r += 1;
741 if (x & 0xcccccccc) r += 2;
742 if (x & 0xf0f0f0f0) r += 4;
743 if (x & 0xff00ff00) r += 8;
744 if (x & 0xffff0000) r += 16;
745#endif
746
747 return r;
748 }
749
750 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
751 ecb_function_ int
752 ecb_ctz64 (uint64_t x)
753 {
754 int shift = x & 0xffffffffU ? 0 : 32;
755 return ecb_ctz32 (x >> shift) + shift;
756 }
757
758 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
759 ecb_function_ int
760 ecb_popcount32 (uint32_t x)
761 {
762 x -= (x >> 1) & 0x55555555;
763 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
764 x = ((x >> 4) + x) & 0x0f0f0f0f;
765 x *= 0x01010101;
766
767 return x >> 24;
768 }
769
770 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
771 ecb_function_ int ecb_ld32 (uint32_t x)
772 {
773 int r = 0;
774
775 if (x >> 16) { x >>= 16; r += 16; }
776 if (x >> 8) { x >>= 8; r += 8; }
777 if (x >> 4) { x >>= 4; r += 4; }
778 if (x >> 2) { x >>= 2; r += 2; }
779 if (x >> 1) { r += 1; }
780
781 return r;
782 }
783
784 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
785 ecb_function_ int ecb_ld64 (uint64_t x)
786 {
787 int r = 0;
788
789 if (x >> 32) { x >>= 32; r += 32; }
790
791 return r + ecb_ld32 (x);
792 }
793#endif
794
795ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
796ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
797{
798 return ( (x * 0x0802U & 0x22110U)
799 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
800}
801
802ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
803ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
804{
805 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
806 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
807 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
808 x = ( x >> 8 ) | ( x << 8);
809
810 return x;
811}
812
813ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
814ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
815{
816 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
817 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
818 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
819 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
820 x = ( x >> 16 ) | ( x << 16);
821
822 return x;
823}
824
825/* popcount64 is only available on 64 bit cpus as gcc builtin */
826/* so for this version we are lazy */
827ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
828ecb_function_ int
829ecb_popcount64 (uint64_t x)
830{
831 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
832}
833
834ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
835ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
836ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
837ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
838ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
839ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
840ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
841ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
842
843ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
844ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
845ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
846ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
847ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
848ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
849ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
850ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
851
852#if ECB_GCC_VERSION(4,3)
853 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
854 #define ecb_bswap32(x) __builtin_bswap32 (x)
855 #define ecb_bswap64(x) __builtin_bswap64 (x)
856#else
857 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
858 ecb_function_ uint16_t
859 ecb_bswap16 (uint16_t x)
860 {
861 return ecb_rotl16 (x, 8);
862 }
863
864 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
865 ecb_function_ uint32_t
866 ecb_bswap32 (uint32_t x)
867 {
868 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
869 }
870
871 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
872 ecb_function_ uint64_t
873 ecb_bswap64 (uint64_t x)
874 {
875 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
876 }
877#endif
878
879#if ECB_GCC_VERSION(4,5)
880 #define ecb_unreachable() __builtin_unreachable ()
881#else
882 /* this seems to work fine, but gcc always emits a warning for it :/ */
883 ecb_inline void ecb_unreachable (void) ecb_noreturn;
884 ecb_inline void ecb_unreachable (void) { }
885#endif
886
887/* try to tell the compiler that some condition is definitely true */
888#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
889
890ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
891ecb_inline unsigned char
892ecb_byteorder_helper (void)
893{
894 const uint32_t u = 0x11223344;
895 return *(unsigned char *)&u;
896}
897
898ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
899ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
900ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
901ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
902
903#if ECB_GCC_VERSION(3,0) || ECB_C99
904 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
905#else
906 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
907#endif
908
909#if __cplusplus
910 template<typename T>
911 static inline T ecb_div_rd (T val, T div)
912 {
913 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
914 }
915 template<typename T>
916 static inline T ecb_div_ru (T val, T div)
917 {
918 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
919 }
920#else
921 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
922 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
923#endif
924
925#if ecb_cplusplus_does_not_suck
926 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
927 template<typename T, int N>
928 static inline int ecb_array_length (const T (&arr)[N])
929 {
930 return N;
931 }
932#else
933 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
934#endif
935
936#endif
937
938/* ECB.H END */
939
940#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
941/* if your architecture doesn't need memory fences, e.g. because it is
942 * single-cpu/core, or if you use libev in a project that doesn't use libev
943 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
944 * libev, in which cases the memory fences become nops.
945 * alternatively, you can remove this #error and link against libpthread,
946 * which will then provide the memory fences.
947 */
948# error "memory fences not defined for your architecture, please report"
949#endif
950
951#ifndef ECB_MEMORY_FENCE
952# define ECB_MEMORY_FENCE do { } while (0)
953# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
954# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
955#endif
956
957#define expect_false(cond) ecb_expect_false (cond)
958#define expect_true(cond) ecb_expect_true (cond)
959#define noinline ecb_noinline
960
961#define inline_size ecb_inline
962
963#if EV_FEATURE_CODE
964# define inline_speed ecb_inline
965#else
966# define inline_speed static noinline
967#endif
968
969#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
970
971#if EV_MINPRI == EV_MAXPRI
972# define ABSPRI(w) (((W)w), 0)
973#else
974# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
975#endif
976
977#define EMPTY /* required for microsofts broken pseudo-c compiler */
978#define EMPTY2(a,b) /* used to suppress some warnings */
979
980typedef ev_watcher *W;
981typedef ev_watcher_list *WL;
982typedef ev_watcher_time *WT;
983
984#define ev_active(w) ((W)(w))->active
985#define ev_at(w) ((WT)(w))->at
986
987#if EV_USE_REALTIME
988/* sig_atomic_t is used to avoid per-thread variables or locking but still */
989/* giving it a reasonably high chance of working on typical architectures */
990static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
991#endif
992
993#if EV_USE_MONOTONIC
994static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
995#endif
996
997#ifndef EV_FD_TO_WIN32_HANDLE
998# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
999#endif
1000#ifndef EV_WIN32_HANDLE_TO_FD
1001# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1002#endif
1003#ifndef EV_WIN32_CLOSE_FD
1004# define EV_WIN32_CLOSE_FD(fd) close (fd)
1005#endif
1006
1007#ifdef _WIN32
1008# include "ev_win32.c"
1009#endif
1010
1011/*****************************************************************************/
1012
1013/* define a suitable floor function (only used by periodics atm) */
1014
1015#if EV_USE_FLOOR
1016# include <math.h>
1017# define ev_floor(v) floor (v)
1018#else
1019
1020#include <float.h>
1021
1022/* a floor() replacement function, should be independent of ev_tstamp type */
1023static ev_tstamp noinline
1024ev_floor (ev_tstamp v)
1025{
1026 /* the choice of shift factor is not terribly important */
1027#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1028 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1029#else
1030 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1031#endif
1032
1033 /* argument too large for an unsigned long? */
1034 if (expect_false (v >= shift))
1035 {
1036 ev_tstamp f;
1037
1038 if (v == v - 1.)
1039 return v; /* very large number */
1040
1041 f = shift * ev_floor (v * (1. / shift));
1042 return f + ev_floor (v - f);
1043 }
1044
1045 /* special treatment for negative args? */
1046 if (expect_false (v < 0.))
1047 {
1048 ev_tstamp f = -ev_floor (-v);
1049
1050 return f - (f == v ? 0 : 1);
1051 }
1052
1053 /* fits into an unsigned long */
1054 return (unsigned long)v;
1055}
1056
1057#endif
1058
1059/*****************************************************************************/
1060
1061#ifdef __linux
1062# include <sys/utsname.h>
1063#endif
1064
1065static unsigned int noinline ecb_cold
1066ev_linux_version (void)
1067{
1068#ifdef __linux
1069 unsigned int v = 0;
1070 struct utsname buf;
1071 int i;
1072 char *p = buf.release;
1073
1074 if (uname (&buf))
1075 return 0;
1076
1077 for (i = 3+1; --i; )
1078 {
1079 unsigned int c = 0;
1080
1081 for (;;)
1082 {
1083 if (*p >= '0' && *p <= '9')
1084 c = c * 10 + *p++ - '0';
1085 else
1086 {
1087 p += *p == '.';
1088 break;
1089 }
1090 }
1091
1092 v = (v << 8) | c;
1093 }
1094
1095 return v;
1096#else
1097 return 0;
1098#endif
1099}
1100
1101/*****************************************************************************/
1102
1103#if EV_AVOID_STDIO
1104static void noinline ecb_cold
1105ev_printerr (const char *msg)
1106{
1107 write (STDERR_FILENO, msg, strlen (msg));
1108}
1109#endif
1110
1111static void (*syserr_cb)(const char *msg) EV_THROW;
1112
1113void ecb_cold
1114ev_set_syserr_cb (void (*cb)(const char *msg)) EV_THROW
1115{
1116 syserr_cb = cb;
1117}
1118
1119static void noinline ecb_cold
1120ev_syserr (const char *msg)
1121{
1122 if (!msg)
1123 msg = "(libev) system error";
1124
1125 if (syserr_cb)
1126 syserr_cb (msg);
1127 else
1128 {
1129#if EV_AVOID_STDIO
1130 ev_printerr (msg);
1131 ev_printerr (": ");
1132 ev_printerr (strerror (errno));
1133 ev_printerr ("\n");
1134#else
1135 perror (msg);
1136#endif
1137 abort ();
1138 }
1139}
1140
1141static void *
1142ev_realloc_emul (void *ptr, long size)
1143{
1144#if __GLIBC__
1145 return realloc (ptr, size);
1146#else
1147 /* some systems, notably openbsd and darwin, fail to properly
1148 * implement realloc (x, 0) (as required by both ansi c-89 and
1149 * the single unix specification, so work around them here.
1150 */
1151
1152 if (size)
1153 return realloc (ptr, size);
1154
1155 free (ptr);
1156 return 0;
1157#endif
1158}
1159
1160static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
1161
1162void ecb_cold
1163ev_set_allocator (void *(*cb)(void *ptr, long size)) EV_THROW
1164{
1165 alloc = cb;
1166}
1167
1168inline_speed void *
1169ev_realloc (void *ptr, long size)
1170{
1171 ptr = alloc (ptr, size);
1172
1173 if (!ptr && size)
1174 {
1175#if EV_AVOID_STDIO
1176 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1177#else
1178 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1179#endif
1180 abort ();
1181 }
1182
1183 return ptr;
1184}
1185
1186#define ev_malloc(size) ev_realloc (0, (size))
1187#define ev_free(ptr) ev_realloc ((ptr), 0)
1188
1189/*****************************************************************************/
1190
1191/* set in reify when reification needed */
1192#define EV_ANFD_REIFY 1
1193
1194/* file descriptor info structure */
1195typedef struct
1196{
1197 WL head;
1198 unsigned char events; /* the events watched for */
1199 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1200 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
1201 unsigned char unused;
1202#if EV_USE_EPOLL
1203 unsigned int egen; /* generation counter to counter epoll bugs */
1204#endif
1205#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1206 SOCKET handle;
1207#endif
1208#if EV_USE_IOCP
1209 OVERLAPPED or, ow;
1210#endif
1211} ANFD;
1212
1213/* stores the pending event set for a given watcher */
1214typedef struct
1215{
1216 W w;
1217 int events; /* the pending event set for the given watcher */
1218} ANPENDING;
1219
1220#if EV_USE_INOTIFY
1221/* hash table entry per inotify-id */
1222typedef struct
1223{
1224 WL head;
1225} ANFS;
1226#endif
1227
1228/* Heap Entry */
1229#if EV_HEAP_CACHE_AT
1230 /* a heap element */
1231 typedef struct {
1232 ev_tstamp at;
1233 WT w;
1234 } ANHE;
1235
1236 #define ANHE_w(he) (he).w /* access watcher, read-write */
1237 #define ANHE_at(he) (he).at /* access cached at, read-only */
1238 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1239#else
1240 /* a heap element */
1241 typedef WT ANHE;
1242
1243 #define ANHE_w(he) (he)
1244 #define ANHE_at(he) (he)->at
1245 #define ANHE_at_cache(he)
1246#endif
1247
1248#if EV_MULTIPLICITY
1249
1250 struct ev_loop
1251 {
1252 ev_tstamp ev_rt_now;
1253 #define ev_rt_now ((loop)->ev_rt_now)
1254 #define VAR(name,decl) decl;
1255 #include "ev_vars.h"
1256 #undef VAR
1257 };
1258 #include "ev_wrap.h"
1259
1260 static struct ev_loop default_loop_struct;
1261 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
1262
1263#else
1264
1265 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
1266 #define VAR(name,decl) static decl;
1267 #include "ev_vars.h"
1268 #undef VAR
1269
1270 static int ev_default_loop_ptr;
1271
1272#endif
1273
1274#if EV_FEATURE_API
1275# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1276# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1277# define EV_INVOKE_PENDING invoke_cb (EV_A)
1278#else
1279# define EV_RELEASE_CB (void)0
1280# define EV_ACQUIRE_CB (void)0
1281# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1282#endif
1283
1284#define EVBREAK_RECURSE 0x80
1285
1286/*****************************************************************************/
1287
1288#ifndef EV_HAVE_EV_TIME
86ev_tstamp 1289ev_tstamp
87ev_time (void) 1290ev_time (void) EV_THROW
88{ 1291{
89#if HAVE_REALTIME 1292#if EV_USE_REALTIME
1293 if (expect_true (have_realtime))
1294 {
90 struct timespec ts; 1295 struct timespec ts;
91 clock_gettime (CLOCK_REALTIME, &ts); 1296 clock_gettime (CLOCK_REALTIME, &ts);
92 return ts.tv_sec + ts.tv_nsec * 1e-9; 1297 return ts.tv_sec + ts.tv_nsec * 1e-9;
93#else 1298 }
1299#endif
1300
94 struct timeval tv; 1301 struct timeval tv;
95 gettimeofday (&tv, 0); 1302 gettimeofday (&tv, 0);
96 return tv.tv_sec + tv.tv_usec * 1e-6; 1303 return tv.tv_sec + tv.tv_usec * 1e-6;
97#endif
98} 1304}
1305#endif
99 1306
100static ev_tstamp 1307inline_size ev_tstamp
101get_clock (void) 1308get_clock (void)
102{ 1309{
103#if HAVE_MONOTONIC 1310#if EV_USE_MONOTONIC
104 if (have_monotonic) 1311 if (expect_true (have_monotonic))
105 { 1312 {
106 struct timespec ts; 1313 struct timespec ts;
107 clock_gettime (CLOCK_MONOTONIC, &ts); 1314 clock_gettime (CLOCK_MONOTONIC, &ts);
108 return ts.tv_sec + ts.tv_nsec * 1e-9; 1315 return ts.tv_sec + ts.tv_nsec * 1e-9;
109 } 1316 }
110#endif 1317#endif
111 1318
112 return ev_time (); 1319 return ev_time ();
113} 1320}
114 1321
115#define array_needsize(base,cur,cnt,init) \ 1322#if EV_MULTIPLICITY
116 if ((cnt) > cur) \ 1323ev_tstamp
117 { \ 1324ev_now (EV_P) EV_THROW
118 int newcnt = cur; \ 1325{
119 do \ 1326 return ev_rt_now;
120 { \ 1327}
121 newcnt = (newcnt << 1) | 4 & ~3; \ 1328#endif
122 } \ 1329
123 while ((cnt) > newcnt); \ 1330void
124 \ 1331ev_sleep (ev_tstamp delay) EV_THROW
125 base = realloc (base, sizeof (*base) * (newcnt)); \ 1332{
126 init (base + cur, newcnt - cur); \ 1333 if (delay > 0.)
127 cur = newcnt; \
128 } 1334 {
1335#if EV_USE_NANOSLEEP
1336 struct timespec ts;
1337
1338 EV_TS_SET (ts, delay);
1339 nanosleep (&ts, 0);
1340#elif defined _WIN32
1341 Sleep ((unsigned long)(delay * 1e3));
1342#else
1343 struct timeval tv;
1344
1345 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1346 /* something not guaranteed by newer posix versions, but guaranteed */
1347 /* by older ones */
1348 EV_TV_SET (tv, delay);
1349 select (0, 0, 0, 0, &tv);
1350#endif
1351 }
1352}
129 1353
130/*****************************************************************************/ 1354/*****************************************************************************/
131 1355
132typedef struct 1356#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
133{
134 struct ev_io *head;
135 int events;
136} ANFD;
137 1357
138static ANFD *anfds; 1358/* find a suitable new size for the given array, */
139static int anfdmax; 1359/* hopefully by rounding to a nice-to-malloc size */
140 1360inline_size int
141static void 1361array_nextsize (int elem, int cur, int cnt)
142anfds_init (ANFD *base, int count)
143{ 1362{
144 while (count--) 1363 int ncur = cur + 1;
145 { 1364
146 base->head = 0; 1365 do
147 base->events = EV_NONE; 1366 ncur <<= 1;
148 ++base; 1367 while (cnt > ncur);
1368
1369 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
1370 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
149 } 1371 {
150} 1372 ncur *= elem;
151 1373 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
152typedef struct 1374 ncur = ncur - sizeof (void *) * 4;
153{ 1375 ncur /= elem;
154 W w;
155 int events;
156} ANPENDING;
157
158static ANPENDING *pendings;
159static int pendingmax, pendingcnt;
160
161static void
162event (W w, int events)
163{
164 if (w->active)
165 { 1376 }
1377
1378 return ncur;
1379}
1380
1381static void * noinline ecb_cold
1382array_realloc (int elem, void *base, int *cur, int cnt)
1383{
1384 *cur = array_nextsize (elem, *cur, cnt);
1385 return ev_realloc (base, elem * *cur);
1386}
1387
1388#define array_init_zero(base,count) \
1389 memset ((void *)(base), 0, sizeof (*(base)) * (count))
1390
1391#define array_needsize(type,base,cur,cnt,init) \
1392 if (expect_false ((cnt) > (cur))) \
1393 { \
1394 int ecb_unused ocur_ = (cur); \
1395 (base) = (type *)array_realloc \
1396 (sizeof (type), (base), &(cur), (cnt)); \
1397 init ((base) + (ocur_), (cur) - ocur_); \
1398 }
1399
1400#if 0
1401#define array_slim(type,stem) \
1402 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
1403 { \
1404 stem ## max = array_roundsize (stem ## cnt >> 1); \
1405 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
1406 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
1407 }
1408#endif
1409
1410#define array_free(stem, idx) \
1411 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
1412
1413/*****************************************************************************/
1414
1415/* dummy callback for pending events */
1416static void noinline
1417pendingcb (EV_P_ ev_prepare *w, int revents)
1418{
1419}
1420
1421void noinline
1422ev_feed_event (EV_P_ void *w, int revents) EV_THROW
1423{
1424 W w_ = (W)w;
1425 int pri = ABSPRI (w_);
1426
1427 if (expect_false (w_->pending))
1428 pendings [pri][w_->pending - 1].events |= revents;
1429 else
1430 {
166 w->pending = ++pendingcnt; 1431 w_->pending = ++pendingcnt [pri];
167 array_needsize (pendings, pendingmax, pendingcnt, ); 1432 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
168 pendings [pendingcnt - 1].w = w; 1433 pendings [pri][w_->pending - 1].w = w_;
169 pendings [pendingcnt - 1].events = events; 1434 pendings [pri][w_->pending - 1].events = revents;
170 } 1435 }
171}
172 1436
173static void 1437 pendingpri = NUMPRI - 1;
1438}
1439
1440inline_speed void
1441feed_reverse (EV_P_ W w)
1442{
1443 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1444 rfeeds [rfeedcnt++] = w;
1445}
1446
1447inline_size void
1448feed_reverse_done (EV_P_ int revents)
1449{
1450 do
1451 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1452 while (rfeedcnt);
1453}
1454
1455inline_speed void
174queue_events (W *events, int eventcnt, int type) 1456queue_events (EV_P_ W *events, int eventcnt, int type)
175{ 1457{
176 int i; 1458 int i;
177 1459
178 for (i = 0; i < eventcnt; ++i) 1460 for (i = 0; i < eventcnt; ++i)
179 event (events [i], type); 1461 ev_feed_event (EV_A_ events [i], type);
180} 1462}
181 1463
182static void 1464/*****************************************************************************/
1465
1466inline_speed void
183fd_event (int fd, int events) 1467fd_event_nocheck (EV_P_ int fd, int revents)
184{ 1468{
185 ANFD *anfd = anfds + fd; 1469 ANFD *anfd = anfds + fd;
186 struct ev_io *w; 1470 ev_io *w;
187 1471
188 for (w = anfd->head; w; w = w->next) 1472 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
189 { 1473 {
190 int ev = w->events & events; 1474 int ev = w->events & revents;
191 1475
192 if (ev) 1476 if (ev)
193 event ((W)w, ev); 1477 ev_feed_event (EV_A_ (W)w, ev);
194 } 1478 }
195} 1479}
196 1480
197/*****************************************************************************/ 1481/* do not submit kernel events for fds that have reify set */
1482/* because that means they changed while we were polling for new events */
1483inline_speed void
1484fd_event (EV_P_ int fd, int revents)
1485{
1486 ANFD *anfd = anfds + fd;
198 1487
199static int *fdchanges; 1488 if (expect_true (!anfd->reify))
200static int fdchangemax, fdchangecnt; 1489 fd_event_nocheck (EV_A_ fd, revents);
1490}
201 1491
202static void 1492void
203fd_reify (void) 1493ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
1494{
1495 if (fd >= 0 && fd < anfdmax)
1496 fd_event_nocheck (EV_A_ fd, revents);
1497}
1498
1499/* make sure the external fd watch events are in-sync */
1500/* with the kernel/libev internal state */
1501inline_size void
1502fd_reify (EV_P)
204{ 1503{
205 int i; 1504 int i;
206 1505
1506#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
207 for (i = 0; i < fdchangecnt; ++i) 1507 for (i = 0; i < fdchangecnt; ++i)
208 { 1508 {
209 int fd = fdchanges [i]; 1509 int fd = fdchanges [i];
210 ANFD *anfd = anfds + fd; 1510 ANFD *anfd = anfds + fd;
211 struct ev_io *w;
212 1511
213 int events = 0; 1512 if (anfd->reify & EV__IOFDSET && anfd->head)
214
215 for (w = anfd->head; w; w = w->next)
216 events |= w->events;
217
218 anfd->events &= ~EV_REIFY;
219
220 if (anfd->events != events)
221 { 1513 {
1514 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1515
1516 if (handle != anfd->handle)
1517 {
1518 unsigned long arg;
1519
1520 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1521
1522 /* handle changed, but fd didn't - we need to do it in two steps */
222 method_modify (fd, anfd->events, events); 1523 backend_modify (EV_A_ fd, anfd->events, 0);
223 anfd->events = events; 1524 anfd->events = 0;
1525 anfd->handle = handle;
1526 }
224 } 1527 }
225 } 1528 }
1529#endif
1530
1531 for (i = 0; i < fdchangecnt; ++i)
1532 {
1533 int fd = fdchanges [i];
1534 ANFD *anfd = anfds + fd;
1535 ev_io *w;
1536
1537 unsigned char o_events = anfd->events;
1538 unsigned char o_reify = anfd->reify;
1539
1540 anfd->reify = 0;
1541
1542 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1543 {
1544 anfd->events = 0;
1545
1546 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1547 anfd->events |= (unsigned char)w->events;
1548
1549 if (o_events != anfd->events)
1550 o_reify = EV__IOFDSET; /* actually |= */
1551 }
1552
1553 if (o_reify & EV__IOFDSET)
1554 backend_modify (EV_A_ fd, o_events, anfd->events);
1555 }
226 1556
227 fdchangecnt = 0; 1557 fdchangecnt = 0;
228} 1558}
229 1559
230static void 1560/* something about the given fd changed */
231fd_change (int fd) 1561inline_size void
1562fd_change (EV_P_ int fd, int flags)
232{ 1563{
233 if (anfds [fd].events & EV_REIFY) 1564 unsigned char reify = anfds [fd].reify;
234 return; 1565 anfds [fd].reify |= flags;
235 1566
236 anfds [fd].events |= EV_REIFY; 1567 if (expect_true (!reify))
237 1568 {
238 ++fdchangecnt; 1569 ++fdchangecnt;
239 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1570 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
240 fdchanges [fdchangecnt - 1] = fd; 1571 fdchanges [fdchangecnt - 1] = fd;
1572 }
1573}
1574
1575/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1576inline_speed void ecb_cold
1577fd_kill (EV_P_ int fd)
1578{
1579 ev_io *w;
1580
1581 while ((w = (ev_io *)anfds [fd].head))
1582 {
1583 ev_io_stop (EV_A_ w);
1584 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1585 }
1586}
1587
1588/* check whether the given fd is actually valid, for error recovery */
1589inline_size int ecb_cold
1590fd_valid (int fd)
1591{
1592#ifdef _WIN32
1593 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1594#else
1595 return fcntl (fd, F_GETFD) != -1;
1596#endif
241} 1597}
242 1598
243/* called on EBADF to verify fds */ 1599/* called on EBADF to verify fds */
244static void 1600static void noinline ecb_cold
245fd_recheck (void) 1601fd_ebadf (EV_P)
246{ 1602{
247 int fd; 1603 int fd;
248 1604
249 for (fd = 0; fd < anfdmax; ++fd) 1605 for (fd = 0; fd < anfdmax; ++fd)
250 if (anfds [fd].events) 1606 if (anfds [fd].events)
251 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 1607 if (!fd_valid (fd) && errno == EBADF)
252 while (anfds [fd].head) 1608 fd_kill (EV_A_ fd);
1609}
1610
1611/* called on ENOMEM in select/poll to kill some fds and retry */
1612static void noinline ecb_cold
1613fd_enomem (EV_P)
1614{
1615 int fd;
1616
1617 for (fd = anfdmax; fd--; )
1618 if (anfds [fd].events)
1619 {
1620 fd_kill (EV_A_ fd);
1621 break;
1622 }
1623}
1624
1625/* usually called after fork if backend needs to re-arm all fds from scratch */
1626static void noinline
1627fd_rearm_all (EV_P)
1628{
1629 int fd;
1630
1631 for (fd = 0; fd < anfdmax; ++fd)
1632 if (anfds [fd].events)
1633 {
1634 anfds [fd].events = 0;
1635 anfds [fd].emask = 0;
1636 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1637 }
1638}
1639
1640/* used to prepare libev internal fd's */
1641/* this is not fork-safe */
1642inline_speed void
1643fd_intern (int fd)
1644{
1645#ifdef _WIN32
1646 unsigned long arg = 1;
1647 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1648#else
1649 fcntl (fd, F_SETFD, FD_CLOEXEC);
1650 fcntl (fd, F_SETFL, O_NONBLOCK);
1651#endif
1652}
1653
1654/*****************************************************************************/
1655
1656/*
1657 * the heap functions want a real array index. array index 0 is guaranteed to not
1658 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1659 * the branching factor of the d-tree.
1660 */
1661
1662/*
1663 * at the moment we allow libev the luxury of two heaps,
1664 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1665 * which is more cache-efficient.
1666 * the difference is about 5% with 50000+ watchers.
1667 */
1668#if EV_USE_4HEAP
1669
1670#define DHEAP 4
1671#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1672#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1673#define UPHEAP_DONE(p,k) ((p) == (k))
1674
1675/* away from the root */
1676inline_speed void
1677downheap (ANHE *heap, int N, int k)
1678{
1679 ANHE he = heap [k];
1680 ANHE *E = heap + N + HEAP0;
1681
1682 for (;;)
1683 {
1684 ev_tstamp minat;
1685 ANHE *minpos;
1686 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1687
1688 /* find minimum child */
1689 if (expect_true (pos + DHEAP - 1 < E))
1690 {
1691 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1692 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1693 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1694 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1695 }
1696 else if (pos < E)
1697 {
1698 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1699 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1700 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1701 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1702 }
1703 else
1704 break;
1705
1706 if (ANHE_at (he) <= minat)
1707 break;
1708
1709 heap [k] = *minpos;
1710 ev_active (ANHE_w (*minpos)) = k;
1711
1712 k = minpos - heap;
1713 }
1714
1715 heap [k] = he;
1716 ev_active (ANHE_w (he)) = k;
1717}
1718
1719#else /* 4HEAP */
1720
1721#define HEAP0 1
1722#define HPARENT(k) ((k) >> 1)
1723#define UPHEAP_DONE(p,k) (!(p))
1724
1725/* away from the root */
1726inline_speed void
1727downheap (ANHE *heap, int N, int k)
1728{
1729 ANHE he = heap [k];
1730
1731 for (;;)
1732 {
1733 int c = k << 1;
1734
1735 if (c >= N + HEAP0)
1736 break;
1737
1738 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1739 ? 1 : 0;
1740
1741 if (ANHE_at (he) <= ANHE_at (heap [c]))
1742 break;
1743
1744 heap [k] = heap [c];
1745 ev_active (ANHE_w (heap [k])) = k;
1746
1747 k = c;
1748 }
1749
1750 heap [k] = he;
1751 ev_active (ANHE_w (he)) = k;
1752}
1753#endif
1754
1755/* towards the root */
1756inline_speed void
1757upheap (ANHE *heap, int k)
1758{
1759 ANHE he = heap [k];
1760
1761 for (;;)
1762 {
1763 int p = HPARENT (k);
1764
1765 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1766 break;
1767
1768 heap [k] = heap [p];
1769 ev_active (ANHE_w (heap [k])) = k;
1770 k = p;
1771 }
1772
1773 heap [k] = he;
1774 ev_active (ANHE_w (he)) = k;
1775}
1776
1777/* move an element suitably so it is in a correct place */
1778inline_size void
1779adjustheap (ANHE *heap, int N, int k)
1780{
1781 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1782 upheap (heap, k);
1783 else
1784 downheap (heap, N, k);
1785}
1786
1787/* rebuild the heap: this function is used only once and executed rarely */
1788inline_size void
1789reheap (ANHE *heap, int N)
1790{
1791 int i;
1792
1793 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1794 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1795 for (i = 0; i < N; ++i)
1796 upheap (heap, i + HEAP0);
1797}
1798
1799/*****************************************************************************/
1800
1801/* associate signal watchers to a signal signal */
1802typedef struct
1803{
1804 EV_ATOMIC_T pending;
1805#if EV_MULTIPLICITY
1806 EV_P;
1807#endif
1808 WL head;
1809} ANSIG;
1810
1811static ANSIG signals [EV_NSIG - 1];
1812
1813/*****************************************************************************/
1814
1815#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1816
1817static void noinline ecb_cold
1818evpipe_init (EV_P)
1819{
1820 if (!ev_is_active (&pipe_w))
1821 {
1822# if EV_USE_EVENTFD
1823 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1824 if (evfd < 0 && errno == EINVAL)
1825 evfd = eventfd (0, 0);
1826
1827 if (evfd >= 0)
1828 {
1829 evpipe [0] = -1;
1830 fd_intern (evfd); /* doing it twice doesn't hurt */
1831 ev_io_set (&pipe_w, evfd, EV_READ);
1832 }
1833 else
1834# endif
1835 {
1836 while (pipe (evpipe))
1837 ev_syserr ("(libev) error creating signal/async pipe");
1838
1839 fd_intern (evpipe [0]);
1840 fd_intern (evpipe [1]);
1841 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1842 }
1843
1844 ev_io_start (EV_A_ &pipe_w);
1845 ev_unref (EV_A); /* watcher should not keep loop alive */
1846 }
1847}
1848
1849inline_speed void
1850evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1851{
1852 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1853
1854 if (expect_true (*flag))
1855 return;
1856
1857 *flag = 1;
1858
1859 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1860
1861 pipe_write_skipped = 1;
1862
1863 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1864
1865 if (pipe_write_wanted)
1866 {
1867 int old_errno;
1868
1869 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1870
1871 old_errno = errno; /* save errno because write will clobber it */
1872
1873#if EV_USE_EVENTFD
1874 if (evfd >= 0)
1875 {
1876 uint64_t counter = 1;
1877 write (evfd, &counter, sizeof (uint64_t));
1878 }
1879 else
1880#endif
1881 {
1882#ifdef _WIN32
1883 WSABUF buf;
1884 DWORD sent;
1885 buf.buf = &buf;
1886 buf.len = 1;
1887 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
1888#else
1889 write (evpipe [1], &(evpipe [1]), 1);
1890#endif
1891 }
1892
1893 errno = old_errno;
1894 }
1895}
1896
1897/* called whenever the libev signal pipe */
1898/* got some events (signal, async) */
1899static void
1900pipecb (EV_P_ ev_io *iow, int revents)
1901{
1902 int i;
1903
1904 if (revents & EV_READ)
1905 {
1906#if EV_USE_EVENTFD
1907 if (evfd >= 0)
1908 {
1909 uint64_t counter;
1910 read (evfd, &counter, sizeof (uint64_t));
1911 }
1912 else
1913#endif
1914 {
1915 char dummy[4];
1916#ifdef _WIN32
1917 WSABUF buf;
1918 DWORD recvd;
1919 buf.buf = dummy;
1920 buf.len = sizeof (dummy);
1921 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, 0, 0, 0);
1922#else
1923 read (evpipe [0], &dummy, sizeof (dummy));
1924#endif
1925 }
1926 }
1927
1928 pipe_write_skipped = 0;
1929
1930 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1931
1932#if EV_SIGNAL_ENABLE
1933 if (sig_pending)
1934 {
1935 sig_pending = 0;
1936
1937 ECB_MEMORY_FENCE_RELEASE;
1938
1939 for (i = EV_NSIG - 1; i--; )
1940 if (expect_false (signals [i].pending))
1941 ev_feed_signal_event (EV_A_ i + 1);
1942 }
1943#endif
1944
1945#if EV_ASYNC_ENABLE
1946 if (async_pending)
1947 {
1948 async_pending = 0;
1949
1950 ECB_MEMORY_FENCE_RELEASE;
1951
1952 for (i = asynccnt; i--; )
1953 if (asyncs [i]->sent)
253 { 1954 {
254 event ((W)anfds [fd].head, EV_ERROR); 1955 asyncs [i]->sent = 0;
255 ev_io_stop (anfds [fd].head); 1956 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
256 } 1957 }
1958 }
1959#endif
257} 1960}
258 1961
259/*****************************************************************************/ 1962/*****************************************************************************/
260 1963
261static struct ev_timer **timers; 1964void
262static int timermax, timercnt; 1965ev_feed_signal (int signum) EV_THROW
1966{
1967#if EV_MULTIPLICITY
1968 EV_P = signals [signum - 1].loop;
263 1969
264static struct ev_periodic **periodics; 1970 if (!EV_A)
265static int periodicmax, periodiccnt; 1971 return;
1972#endif
1973
1974 if (!ev_active (&pipe_w))
1975 return;
1976
1977 signals [signum - 1].pending = 1;
1978 evpipe_write (EV_A_ &sig_pending);
1979}
266 1980
267static void 1981static void
268upheap (WT *timers, int k) 1982ev_sighandler (int signum)
269{ 1983{
270 WT w = timers [k]; 1984#ifdef _WIN32
1985 signal (signum, ev_sighandler);
1986#endif
271 1987
272 while (k && timers [k >> 1]->at > w->at) 1988 ev_feed_signal (signum);
273 {
274 timers [k] = timers [k >> 1];
275 timers [k]->active = k + 1;
276 k >>= 1;
277 }
278
279 timers [k] = w;
280 timers [k]->active = k + 1;
281
282} 1989}
283 1990
1991void noinline
1992ev_feed_signal_event (EV_P_ int signum) EV_THROW
1993{
1994 WL w;
1995
1996 if (expect_false (signum <= 0 || signum > EV_NSIG))
1997 return;
1998
1999 --signum;
2000
2001#if EV_MULTIPLICITY
2002 /* it is permissible to try to feed a signal to the wrong loop */
2003 /* or, likely more useful, feeding a signal nobody is waiting for */
2004
2005 if (expect_false (signals [signum].loop != EV_A))
2006 return;
2007#endif
2008
2009 signals [signum].pending = 0;
2010
2011 for (w = signals [signum].head; w; w = w->next)
2012 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2013}
2014
2015#if EV_USE_SIGNALFD
284static void 2016static void
285downheap (WT *timers, int N, int k) 2017sigfdcb (EV_P_ ev_io *iow, int revents)
286{ 2018{
287 WT w = timers [k]; 2019 struct signalfd_siginfo si[2], *sip; /* these structs are big */
288 2020
289 while (k < (N >> 1)) 2021 for (;;)
290 { 2022 {
291 int j = k << 1; 2023 ssize_t res = read (sigfd, si, sizeof (si));
292 2024
293 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 2025 /* not ISO-C, as res might be -1, but works with SuS */
294 ++j; 2026 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2027 ev_feed_signal_event (EV_A_ sip->ssi_signo);
295 2028
296 if (w->at <= timers [j]->at) 2029 if (res < (ssize_t)sizeof (si))
297 break; 2030 break;
298
299 timers [k] = timers [j];
300 timers [k]->active = k + 1;
301 k = j;
302 } 2031 }
303
304 timers [k] = w;
305 timers [k]->active = k + 1;
306} 2032}
2033#endif
2034
2035#endif
307 2036
308/*****************************************************************************/ 2037/*****************************************************************************/
309 2038
310typedef struct 2039#if EV_CHILD_ENABLE
311{ 2040static WL childs [EV_PID_HASHSIZE];
312 struct ev_signal *head;
313 sig_atomic_t gotsig;
314} ANSIG;
315 2041
316static ANSIG *signals;
317static int signalmax;
318
319static int sigpipe [2];
320static sig_atomic_t gotsig;
321static struct ev_io sigev;
322
323static void
324signals_init (ANSIG *base, int count)
325{
326 while (count--)
327 {
328 base->head = 0;
329 base->gotsig = 0;
330 ++base;
331 }
332}
333
334static void
335sighandler (int signum)
336{
337 signals [signum - 1].gotsig = 1;
338
339 if (!gotsig)
340 {
341 gotsig = 1;
342 write (sigpipe [1], &gotsig, 1);
343 }
344}
345
346static void
347sigcb (struct ev_io *iow, int revents)
348{
349 struct ev_signal *w;
350 int sig;
351
352 gotsig = 0;
353 read (sigpipe [0], &revents, 1);
354
355 for (sig = signalmax; sig--; )
356 if (signals [sig].gotsig)
357 {
358 signals [sig].gotsig = 0;
359
360 for (w = signals [sig].head; w; w = w->next)
361 event ((W)w, EV_SIGNAL);
362 }
363}
364
365static void
366siginit (void)
367{
368 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
369 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
370
371 /* rather than sort out wether we really need nb, set it */
372 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
373 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
374
375 ev_io_set (&sigev, sigpipe [0], EV_READ);
376 ev_io_start (&sigev);
377}
378
379/*****************************************************************************/
380
381static struct ev_idle **idles;
382static int idlemax, idlecnt;
383
384static struct ev_prepare **prepares;
385static int preparemax, preparecnt;
386
387static struct ev_check **checks;
388static int checkmax, checkcnt;
389
390/*****************************************************************************/
391
392static struct ev_child *childs [PID_HASHSIZE];
393static struct ev_signal childev; 2042static ev_signal childev;
2043
2044#ifndef WIFCONTINUED
2045# define WIFCONTINUED(status) 0
2046#endif
2047
2048/* handle a single child status event */
2049inline_speed void
2050child_reap (EV_P_ int chain, int pid, int status)
2051{
2052 ev_child *w;
2053 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
2054
2055 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2056 {
2057 if ((w->pid == pid || !w->pid)
2058 && (!traced || (w->flags & 1)))
2059 {
2060 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
2061 w->rpid = pid;
2062 w->rstatus = status;
2063 ev_feed_event (EV_A_ (W)w, EV_CHILD);
2064 }
2065 }
2066}
394 2067
395#ifndef WCONTINUED 2068#ifndef WCONTINUED
396# define WCONTINUED 0 2069# define WCONTINUED 0
397#endif 2070#endif
398 2071
2072/* called on sigchld etc., calls waitpid */
399static void 2073static void
400childcb (struct ev_signal *sw, int revents) 2074childcb (EV_P_ ev_signal *sw, int revents)
401{ 2075{
402 struct ev_child *w;
403 int pid, status; 2076 int pid, status;
404 2077
2078 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
405 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 2079 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
406 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 2080 if (!WCONTINUED
407 if (w->pid == pid || w->pid == -1) 2081 || errno != EINVAL
2082 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
2083 return;
2084
2085 /* make sure we are called again until all children have been reaped */
2086 /* we need to do it this way so that the callback gets called before we continue */
2087 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
2088
2089 child_reap (EV_A_ pid, pid, status);
2090 if ((EV_PID_HASHSIZE) > 1)
2091 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
2092}
2093
2094#endif
2095
2096/*****************************************************************************/
2097
2098#if EV_USE_IOCP
2099# include "ev_iocp.c"
2100#endif
2101#if EV_USE_PORT
2102# include "ev_port.c"
2103#endif
2104#if EV_USE_KQUEUE
2105# include "ev_kqueue.c"
2106#endif
2107#if EV_USE_EPOLL
2108# include "ev_epoll.c"
2109#endif
2110#if EV_USE_POLL
2111# include "ev_poll.c"
2112#endif
2113#if EV_USE_SELECT
2114# include "ev_select.c"
2115#endif
2116
2117int ecb_cold
2118ev_version_major (void) EV_THROW
2119{
2120 return EV_VERSION_MAJOR;
2121}
2122
2123int ecb_cold
2124ev_version_minor (void) EV_THROW
2125{
2126 return EV_VERSION_MINOR;
2127}
2128
2129/* return true if we are running with elevated privileges and should ignore env variables */
2130int inline_size ecb_cold
2131enable_secure (void)
2132{
2133#ifdef _WIN32
2134 return 0;
2135#else
2136 return getuid () != geteuid ()
2137 || getgid () != getegid ();
2138#endif
2139}
2140
2141unsigned int ecb_cold
2142ev_supported_backends (void) EV_THROW
2143{
2144 unsigned int flags = 0;
2145
2146 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2147 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
2148 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2149 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2150 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2151
2152 return flags;
2153}
2154
2155unsigned int ecb_cold
2156ev_recommended_backends (void) EV_THROW
2157{
2158 unsigned int flags = ev_supported_backends ();
2159
2160#ifndef __NetBSD__
2161 /* kqueue is borked on everything but netbsd apparently */
2162 /* it usually doesn't work correctly on anything but sockets and pipes */
2163 flags &= ~EVBACKEND_KQUEUE;
2164#endif
2165#ifdef __APPLE__
2166 /* only select works correctly on that "unix-certified" platform */
2167 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2168 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2169#endif
2170#ifdef __FreeBSD__
2171 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2172#endif
2173
2174 return flags;
2175}
2176
2177unsigned int ecb_cold
2178ev_embeddable_backends (void) EV_THROW
2179{
2180 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2181
2182 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2183 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2184 flags &= ~EVBACKEND_EPOLL;
2185
2186 return flags;
2187}
2188
2189unsigned int
2190ev_backend (EV_P) EV_THROW
2191{
2192 return backend;
2193}
2194
2195#if EV_FEATURE_API
2196unsigned int
2197ev_iteration (EV_P) EV_THROW
2198{
2199 return loop_count;
2200}
2201
2202unsigned int
2203ev_depth (EV_P) EV_THROW
2204{
2205 return loop_depth;
2206}
2207
2208void
2209ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2210{
2211 io_blocktime = interval;
2212}
2213
2214void
2215ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2216{
2217 timeout_blocktime = interval;
2218}
2219
2220void
2221ev_set_userdata (EV_P_ void *data) EV_THROW
2222{
2223 userdata = data;
2224}
2225
2226void *
2227ev_userdata (EV_P) EV_THROW
2228{
2229 return userdata;
2230}
2231
2232void
2233ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
2234{
2235 invoke_cb = invoke_pending_cb;
2236}
2237
2238void
2239ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2240{
2241 release_cb = release;
2242 acquire_cb = acquire;
2243}
2244#endif
2245
2246/* initialise a loop structure, must be zero-initialised */
2247static void noinline ecb_cold
2248loop_init (EV_P_ unsigned int flags) EV_THROW
2249{
2250 if (!backend)
2251 {
2252 origflags = flags;
2253
2254#if EV_USE_REALTIME
2255 if (!have_realtime)
408 { 2256 {
409 w->status = status; 2257 struct timespec ts;
410 event ((W)w, EV_CHILD); 2258
2259 if (!clock_gettime (CLOCK_REALTIME, &ts))
2260 have_realtime = 1;
411 } 2261 }
2262#endif
2263
2264#if EV_USE_MONOTONIC
2265 if (!have_monotonic)
2266 {
2267 struct timespec ts;
2268
2269 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
2270 have_monotonic = 1;
2271 }
2272#endif
2273
2274 /* pid check not overridable via env */
2275#ifndef _WIN32
2276 if (flags & EVFLAG_FORKCHECK)
2277 curpid = getpid ();
2278#endif
2279
2280 if (!(flags & EVFLAG_NOENV)
2281 && !enable_secure ()
2282 && getenv ("LIBEV_FLAGS"))
2283 flags = atoi (getenv ("LIBEV_FLAGS"));
2284
2285 ev_rt_now = ev_time ();
2286 mn_now = get_clock ();
2287 now_floor = mn_now;
2288 rtmn_diff = ev_rt_now - mn_now;
2289#if EV_FEATURE_API
2290 invoke_cb = ev_invoke_pending;
2291#endif
2292
2293 io_blocktime = 0.;
2294 timeout_blocktime = 0.;
2295 backend = 0;
2296 backend_fd = -1;
2297 sig_pending = 0;
2298#if EV_ASYNC_ENABLE
2299 async_pending = 0;
2300#endif
2301 pipe_write_skipped = 0;
2302 pipe_write_wanted = 0;
2303#if EV_USE_INOTIFY
2304 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2305#endif
2306#if EV_USE_SIGNALFD
2307 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2308#endif
2309
2310 if (!(flags & EVBACKEND_MASK))
2311 flags |= ev_recommended_backends ();
2312
2313#if EV_USE_IOCP
2314 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2315#endif
2316#if EV_USE_PORT
2317 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
2318#endif
2319#if EV_USE_KQUEUE
2320 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
2321#endif
2322#if EV_USE_EPOLL
2323 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
2324#endif
2325#if EV_USE_POLL
2326 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
2327#endif
2328#if EV_USE_SELECT
2329 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
2330#endif
2331
2332 ev_prepare_init (&pending_w, pendingcb);
2333
2334#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2335 ev_init (&pipe_w, pipecb);
2336 ev_set_priority (&pipe_w, EV_MAXPRI);
2337#endif
2338 }
2339}
2340
2341/* free up a loop structure */
2342void ecb_cold
2343ev_loop_destroy (EV_P)
2344{
2345 int i;
2346
2347#if EV_MULTIPLICITY
2348 /* mimic free (0) */
2349 if (!EV_A)
2350 return;
2351#endif
2352
2353#if EV_CLEANUP_ENABLE
2354 /* queue cleanup watchers (and execute them) */
2355 if (expect_false (cleanupcnt))
2356 {
2357 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2358 EV_INVOKE_PENDING;
2359 }
2360#endif
2361
2362#if EV_CHILD_ENABLE
2363 if (ev_is_active (&childev))
2364 {
2365 ev_ref (EV_A); /* child watcher */
2366 ev_signal_stop (EV_A_ &childev);
2367 }
2368#endif
2369
2370 if (ev_is_active (&pipe_w))
2371 {
2372 /*ev_ref (EV_A);*/
2373 /*ev_io_stop (EV_A_ &pipe_w);*/
2374
2375#if EV_USE_EVENTFD
2376 if (evfd >= 0)
2377 close (evfd);
2378#endif
2379
2380 if (evpipe [0] >= 0)
2381 {
2382 EV_WIN32_CLOSE_FD (evpipe [0]);
2383 EV_WIN32_CLOSE_FD (evpipe [1]);
2384 }
2385 }
2386
2387#if EV_USE_SIGNALFD
2388 if (ev_is_active (&sigfd_w))
2389 close (sigfd);
2390#endif
2391
2392#if EV_USE_INOTIFY
2393 if (fs_fd >= 0)
2394 close (fs_fd);
2395#endif
2396
2397 if (backend_fd >= 0)
2398 close (backend_fd);
2399
2400#if EV_USE_IOCP
2401 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2402#endif
2403#if EV_USE_PORT
2404 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
2405#endif
2406#if EV_USE_KQUEUE
2407 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
2408#endif
2409#if EV_USE_EPOLL
2410 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
2411#endif
2412#if EV_USE_POLL
2413 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
2414#endif
2415#if EV_USE_SELECT
2416 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
2417#endif
2418
2419 for (i = NUMPRI; i--; )
2420 {
2421 array_free (pending, [i]);
2422#if EV_IDLE_ENABLE
2423 array_free (idle, [i]);
2424#endif
2425 }
2426
2427 ev_free (anfds); anfds = 0; anfdmax = 0;
2428
2429 /* have to use the microsoft-never-gets-it-right macro */
2430 array_free (rfeed, EMPTY);
2431 array_free (fdchange, EMPTY);
2432 array_free (timer, EMPTY);
2433#if EV_PERIODIC_ENABLE
2434 array_free (periodic, EMPTY);
2435#endif
2436#if EV_FORK_ENABLE
2437 array_free (fork, EMPTY);
2438#endif
2439#if EV_CLEANUP_ENABLE
2440 array_free (cleanup, EMPTY);
2441#endif
2442 array_free (prepare, EMPTY);
2443 array_free (check, EMPTY);
2444#if EV_ASYNC_ENABLE
2445 array_free (async, EMPTY);
2446#endif
2447
2448 backend = 0;
2449
2450#if EV_MULTIPLICITY
2451 if (ev_is_default_loop (EV_A))
2452#endif
2453 ev_default_loop_ptr = 0;
2454#if EV_MULTIPLICITY
2455 else
2456 ev_free (EV_A);
2457#endif
2458}
2459
2460#if EV_USE_INOTIFY
2461inline_size void infy_fork (EV_P);
2462#endif
2463
2464inline_size void
2465loop_fork (EV_P)
2466{
2467#if EV_USE_PORT
2468 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2469#endif
2470#if EV_USE_KQUEUE
2471 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
2472#endif
2473#if EV_USE_EPOLL
2474 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
2475#endif
2476#if EV_USE_INOTIFY
2477 infy_fork (EV_A);
2478#endif
2479
2480 if (ev_is_active (&pipe_w))
2481 {
2482 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2483
2484 ev_ref (EV_A);
2485 ev_io_stop (EV_A_ &pipe_w);
2486
2487#if EV_USE_EVENTFD
2488 if (evfd >= 0)
2489 close (evfd);
2490#endif
2491
2492 if (evpipe [0] >= 0)
2493 {
2494 EV_WIN32_CLOSE_FD (evpipe [0]);
2495 EV_WIN32_CLOSE_FD (evpipe [1]);
2496 }
2497
2498#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2499 evpipe_init (EV_A);
2500 /* now iterate over everything, in case we missed something */
2501 pipecb (EV_A_ &pipe_w, EV_READ);
2502#endif
2503 }
2504
2505 postfork = 0;
2506}
2507
2508#if EV_MULTIPLICITY
2509
2510struct ev_loop * ecb_cold
2511ev_loop_new (unsigned int flags) EV_THROW
2512{
2513 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2514
2515 memset (EV_A, 0, sizeof (struct ev_loop));
2516 loop_init (EV_A_ flags);
2517
2518 if (ev_backend (EV_A))
2519 return EV_A;
2520
2521 ev_free (EV_A);
2522 return 0;
2523}
2524
2525#endif /* multiplicity */
2526
2527#if EV_VERIFY
2528static void noinline ecb_cold
2529verify_watcher (EV_P_ W w)
2530{
2531 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2532
2533 if (w->pending)
2534 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2535}
2536
2537static void noinline ecb_cold
2538verify_heap (EV_P_ ANHE *heap, int N)
2539{
2540 int i;
2541
2542 for (i = HEAP0; i < N + HEAP0; ++i)
2543 {
2544 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2545 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2546 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2547
2548 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2549 }
2550}
2551
2552static void noinline ecb_cold
2553array_verify (EV_P_ W *ws, int cnt)
2554{
2555 while (cnt--)
2556 {
2557 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2558 verify_watcher (EV_A_ ws [cnt]);
2559 }
2560}
2561#endif
2562
2563#if EV_FEATURE_API
2564void ecb_cold
2565ev_verify (EV_P) EV_THROW
2566{
2567#if EV_VERIFY
2568 int i, j;
2569 WL w, w2;
2570
2571 assert (activecnt >= -1);
2572
2573 assert (fdchangemax >= fdchangecnt);
2574 for (i = 0; i < fdchangecnt; ++i)
2575 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2576
2577 assert (anfdmax >= 0);
2578 for (i = j = 0; i < anfdmax; ++i)
2579 for (w = w2 = anfds [i].head; w; w = w->next)
2580 {
2581 verify_watcher (EV_A_ (W)w);
2582
2583 if (j++ & 1)
2584 {
2585 assert (("libev: io watcher list contains a loop", w != w2));
2586 w2 = w2->next;
2587 }
2588
2589 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2590 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2591 }
2592
2593 assert (timermax >= timercnt);
2594 verify_heap (EV_A_ timers, timercnt);
2595
2596#if EV_PERIODIC_ENABLE
2597 assert (periodicmax >= periodiccnt);
2598 verify_heap (EV_A_ periodics, periodiccnt);
2599#endif
2600
2601 for (i = NUMPRI; i--; )
2602 {
2603 assert (pendingmax [i] >= pendingcnt [i]);
2604#if EV_IDLE_ENABLE
2605 assert (idleall >= 0);
2606 assert (idlemax [i] >= idlecnt [i]);
2607 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2608#endif
2609 }
2610
2611#if EV_FORK_ENABLE
2612 assert (forkmax >= forkcnt);
2613 array_verify (EV_A_ (W *)forks, forkcnt);
2614#endif
2615
2616#if EV_CLEANUP_ENABLE
2617 assert (cleanupmax >= cleanupcnt);
2618 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2619#endif
2620
2621#if EV_ASYNC_ENABLE
2622 assert (asyncmax >= asynccnt);
2623 array_verify (EV_A_ (W *)asyncs, asynccnt);
2624#endif
2625
2626#if EV_PREPARE_ENABLE
2627 assert (preparemax >= preparecnt);
2628 array_verify (EV_A_ (W *)prepares, preparecnt);
2629#endif
2630
2631#if EV_CHECK_ENABLE
2632 assert (checkmax >= checkcnt);
2633 array_verify (EV_A_ (W *)checks, checkcnt);
2634#endif
2635
2636# if 0
2637#if EV_CHILD_ENABLE
2638 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2639 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2640#endif
2641# endif
2642#endif
2643}
2644#endif
2645
2646#if EV_MULTIPLICITY
2647struct ev_loop * ecb_cold
2648#else
2649int
2650#endif
2651ev_default_loop (unsigned int flags) EV_THROW
2652{
2653 if (!ev_default_loop_ptr)
2654 {
2655#if EV_MULTIPLICITY
2656 EV_P = ev_default_loop_ptr = &default_loop_struct;
2657#else
2658 ev_default_loop_ptr = 1;
2659#endif
2660
2661 loop_init (EV_A_ flags);
2662
2663 if (ev_backend (EV_A))
2664 {
2665#if EV_CHILD_ENABLE
2666 ev_signal_init (&childev, childcb, SIGCHLD);
2667 ev_set_priority (&childev, EV_MAXPRI);
2668 ev_signal_start (EV_A_ &childev);
2669 ev_unref (EV_A); /* child watcher should not keep loop alive */
2670#endif
2671 }
2672 else
2673 ev_default_loop_ptr = 0;
2674 }
2675
2676 return ev_default_loop_ptr;
2677}
2678
2679void
2680ev_loop_fork (EV_P) EV_THROW
2681{
2682 postfork = 1; /* must be in line with ev_default_fork */
412} 2683}
413 2684
414/*****************************************************************************/ 2685/*****************************************************************************/
415 2686
416#if HAVE_EPOLL 2687void
417# include "ev_epoll.c" 2688ev_invoke (EV_P_ void *w, int revents)
2689{
2690 EV_CB_INVOKE ((W)w, revents);
2691}
2692
2693unsigned int
2694ev_pending_count (EV_P) EV_THROW
2695{
2696 int pri;
2697 unsigned int count = 0;
2698
2699 for (pri = NUMPRI; pri--; )
2700 count += pendingcnt [pri];
2701
2702 return count;
2703}
2704
2705void noinline
2706ev_invoke_pending (EV_P)
2707{
2708 for (pendingpri = NUMPRI; pendingpri--; ) /* pendingpri is modified during the loop */
2709 while (pendingcnt [pendingpri])
2710 {
2711 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2712
2713 p->w->pending = 0;
2714 EV_CB_INVOKE (p->w, p->events);
2715 EV_FREQUENT_CHECK;
2716 }
2717}
2718
2719#if EV_IDLE_ENABLE
2720/* make idle watchers pending. this handles the "call-idle */
2721/* only when higher priorities are idle" logic */
2722inline_size void
2723idle_reify (EV_P)
2724{
2725 if (expect_false (idleall))
2726 {
2727 int pri;
2728
2729 for (pri = NUMPRI; pri--; )
2730 {
2731 if (pendingcnt [pri])
2732 break;
2733
2734 if (idlecnt [pri])
2735 {
2736 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2737 break;
2738 }
2739 }
2740 }
2741}
2742#endif
2743
2744/* make timers pending */
2745inline_size void
2746timers_reify (EV_P)
2747{
2748 EV_FREQUENT_CHECK;
2749
2750 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2751 {
2752 do
2753 {
2754 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2755
2756 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2757
2758 /* first reschedule or stop timer */
2759 if (w->repeat)
2760 {
2761 ev_at (w) += w->repeat;
2762 if (ev_at (w) < mn_now)
2763 ev_at (w) = mn_now;
2764
2765 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2766
2767 ANHE_at_cache (timers [HEAP0]);
2768 downheap (timers, timercnt, HEAP0);
2769 }
2770 else
2771 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2772
2773 EV_FREQUENT_CHECK;
2774 feed_reverse (EV_A_ (W)w);
2775 }
2776 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2777
2778 feed_reverse_done (EV_A_ EV_TIMER);
2779 }
2780}
2781
2782#if EV_PERIODIC_ENABLE
2783
2784static void noinline
2785periodic_recalc (EV_P_ ev_periodic *w)
2786{
2787 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2788 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2789
2790 /* the above almost always errs on the low side */
2791 while (at <= ev_rt_now)
2792 {
2793 ev_tstamp nat = at + w->interval;
2794
2795 /* when resolution fails us, we use ev_rt_now */
2796 if (expect_false (nat == at))
2797 {
2798 at = ev_rt_now;
2799 break;
2800 }
2801
2802 at = nat;
2803 }
2804
2805 ev_at (w) = at;
2806}
2807
2808/* make periodics pending */
2809inline_size void
2810periodics_reify (EV_P)
2811{
2812 EV_FREQUENT_CHECK;
2813
2814 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2815 {
2816 int feed_count = 0;
2817
2818 do
2819 {
2820 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2821
2822 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2823
2824 /* first reschedule or stop timer */
2825 if (w->reschedule_cb)
2826 {
2827 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2828
2829 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2830
2831 ANHE_at_cache (periodics [HEAP0]);
2832 downheap (periodics, periodiccnt, HEAP0);
2833 }
2834 else if (w->interval)
2835 {
2836 periodic_recalc (EV_A_ w);
2837 ANHE_at_cache (periodics [HEAP0]);
2838 downheap (periodics, periodiccnt, HEAP0);
2839 }
2840 else
2841 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2842
2843 EV_FREQUENT_CHECK;
2844 feed_reverse (EV_A_ (W)w);
2845 }
2846 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2847
2848 feed_reverse_done (EV_A_ EV_PERIODIC);
2849 }
2850}
2851
2852/* simply recalculate all periodics */
2853/* TODO: maybe ensure that at least one event happens when jumping forward? */
2854static void noinline ecb_cold
2855periodics_reschedule (EV_P)
2856{
2857 int i;
2858
2859 /* adjust periodics after time jump */
2860 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2861 {
2862 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2863
2864 if (w->reschedule_cb)
2865 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2866 else if (w->interval)
2867 periodic_recalc (EV_A_ w);
2868
2869 ANHE_at_cache (periodics [i]);
2870 }
2871
2872 reheap (periodics, periodiccnt);
2873}
2874#endif
2875
2876/* adjust all timers by a given offset */
2877static void noinline ecb_cold
2878timers_reschedule (EV_P_ ev_tstamp adjust)
2879{
2880 int i;
2881
2882 for (i = 0; i < timercnt; ++i)
2883 {
2884 ANHE *he = timers + i + HEAP0;
2885 ANHE_w (*he)->at += adjust;
2886 ANHE_at_cache (*he);
2887 }
2888}
2889
2890/* fetch new monotonic and realtime times from the kernel */
2891/* also detect if there was a timejump, and act accordingly */
2892inline_speed void
2893time_update (EV_P_ ev_tstamp max_block)
2894{
2895#if EV_USE_MONOTONIC
2896 if (expect_true (have_monotonic))
2897 {
2898 int i;
2899 ev_tstamp odiff = rtmn_diff;
2900
2901 mn_now = get_clock ();
2902
2903 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2904 /* interpolate in the meantime */
2905 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2906 {
2907 ev_rt_now = rtmn_diff + mn_now;
2908 return;
2909 }
2910
2911 now_floor = mn_now;
2912 ev_rt_now = ev_time ();
2913
2914 /* loop a few times, before making important decisions.
2915 * on the choice of "4": one iteration isn't enough,
2916 * in case we get preempted during the calls to
2917 * ev_time and get_clock. a second call is almost guaranteed
2918 * to succeed in that case, though. and looping a few more times
2919 * doesn't hurt either as we only do this on time-jumps or
2920 * in the unlikely event of having been preempted here.
2921 */
2922 for (i = 4; --i; )
2923 {
2924 ev_tstamp diff;
2925 rtmn_diff = ev_rt_now - mn_now;
2926
2927 diff = odiff - rtmn_diff;
2928
2929 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2930 return; /* all is well */
2931
2932 ev_rt_now = ev_time ();
2933 mn_now = get_clock ();
2934 now_floor = mn_now;
2935 }
2936
2937 /* no timer adjustment, as the monotonic clock doesn't jump */
2938 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2939# if EV_PERIODIC_ENABLE
2940 periodics_reschedule (EV_A);
418#endif 2941# endif
419#if HAVE_SELECT 2942 }
420# include "ev_select.c" 2943 else
421#endif 2944#endif
2945 {
2946 ev_rt_now = ev_time ();
2947
2948 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2949 {
2950 /* adjust timers. this is easy, as the offset is the same for all of them */
2951 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2952#if EV_PERIODIC_ENABLE
2953 periodics_reschedule (EV_A);
2954#endif
2955 }
2956
2957 mn_now = ev_rt_now;
2958 }
2959}
422 2960
423int 2961int
424ev_version_major (void) 2962ev_run (EV_P_ int flags)
425{ 2963{
426 return EV_VERSION_MAJOR; 2964#if EV_FEATURE_API
2965 ++loop_depth;
2966#endif
2967
2968 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2969
2970 loop_done = EVBREAK_CANCEL;
2971
2972 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2973
2974 do
2975 {
2976#if EV_VERIFY >= 2
2977 ev_verify (EV_A);
2978#endif
2979
2980#ifndef _WIN32
2981 if (expect_false (curpid)) /* penalise the forking check even more */
2982 if (expect_false (getpid () != curpid))
2983 {
2984 curpid = getpid ();
2985 postfork = 1;
2986 }
2987#endif
2988
2989#if EV_FORK_ENABLE
2990 /* we might have forked, so queue fork handlers */
2991 if (expect_false (postfork))
2992 if (forkcnt)
2993 {
2994 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2995 EV_INVOKE_PENDING;
2996 }
2997#endif
2998
2999#if EV_PREPARE_ENABLE
3000 /* queue prepare watchers (and execute them) */
3001 if (expect_false (preparecnt))
3002 {
3003 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
3004 EV_INVOKE_PENDING;
3005 }
3006#endif
3007
3008 if (expect_false (loop_done))
3009 break;
3010
3011 /* we might have forked, so reify kernel state if necessary */
3012 if (expect_false (postfork))
3013 loop_fork (EV_A);
3014
3015 /* update fd-related kernel structures */
3016 fd_reify (EV_A);
3017
3018 /* calculate blocking time */
3019 {
3020 ev_tstamp waittime = 0.;
3021 ev_tstamp sleeptime = 0.;
3022
3023 /* remember old timestamp for io_blocktime calculation */
3024 ev_tstamp prev_mn_now = mn_now;
3025
3026 /* update time to cancel out callback processing overhead */
3027 time_update (EV_A_ 1e100);
3028
3029 /* from now on, we want a pipe-wake-up */
3030 pipe_write_wanted = 1;
3031
3032 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3033
3034 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
3035 {
3036 waittime = MAX_BLOCKTIME;
3037
3038 if (timercnt)
3039 {
3040 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
3041 if (waittime > to) waittime = to;
3042 }
3043
3044#if EV_PERIODIC_ENABLE
3045 if (periodiccnt)
3046 {
3047 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
3048 if (waittime > to) waittime = to;
3049 }
3050#endif
3051
3052 /* don't let timeouts decrease the waittime below timeout_blocktime */
3053 if (expect_false (waittime < timeout_blocktime))
3054 waittime = timeout_blocktime;
3055
3056 /* at this point, we NEED to wait, so we have to ensure */
3057 /* to pass a minimum nonzero value to the backend */
3058 if (expect_false (waittime < backend_mintime))
3059 waittime = backend_mintime;
3060
3061 /* extra check because io_blocktime is commonly 0 */
3062 if (expect_false (io_blocktime))
3063 {
3064 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3065
3066 if (sleeptime > waittime - backend_mintime)
3067 sleeptime = waittime - backend_mintime;
3068
3069 if (expect_true (sleeptime > 0.))
3070 {
3071 ev_sleep (sleeptime);
3072 waittime -= sleeptime;
3073 }
3074 }
3075 }
3076
3077#if EV_FEATURE_API
3078 ++loop_count;
3079#endif
3080 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
3081 backend_poll (EV_A_ waittime);
3082 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3083
3084 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3085
3086 if (pipe_write_skipped)
3087 {
3088 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3089 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3090 }
3091
3092
3093 /* update ev_rt_now, do magic */
3094 time_update (EV_A_ waittime + sleeptime);
3095 }
3096
3097 /* queue pending timers and reschedule them */
3098 timers_reify (EV_A); /* relative timers called last */
3099#if EV_PERIODIC_ENABLE
3100 periodics_reify (EV_A); /* absolute timers called first */
3101#endif
3102
3103#if EV_IDLE_ENABLE
3104 /* queue idle watchers unless other events are pending */
3105 idle_reify (EV_A);
3106#endif
3107
3108#if EV_CHECK_ENABLE
3109 /* queue check watchers, to be executed first */
3110 if (expect_false (checkcnt))
3111 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3112#endif
3113
3114 EV_INVOKE_PENDING;
3115 }
3116 while (expect_true (
3117 activecnt
3118 && !loop_done
3119 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3120 ));
3121
3122 if (loop_done == EVBREAK_ONE)
3123 loop_done = EVBREAK_CANCEL;
3124
3125#if EV_FEATURE_API
3126 --loop_depth;
3127#endif
3128
3129 return activecnt;
3130}
3131
3132void
3133ev_break (EV_P_ int how) EV_THROW
3134{
3135 loop_done = how;
3136}
3137
3138void
3139ev_ref (EV_P) EV_THROW
3140{
3141 ++activecnt;
3142}
3143
3144void
3145ev_unref (EV_P) EV_THROW
3146{
3147 --activecnt;
3148}
3149
3150void
3151ev_now_update (EV_P) EV_THROW
3152{
3153 time_update (EV_A_ 1e100);
3154}
3155
3156void
3157ev_suspend (EV_P) EV_THROW
3158{
3159 ev_now_update (EV_A);
3160}
3161
3162void
3163ev_resume (EV_P) EV_THROW
3164{
3165 ev_tstamp mn_prev = mn_now;
3166
3167 ev_now_update (EV_A);
3168 timers_reschedule (EV_A_ mn_now - mn_prev);
3169#if EV_PERIODIC_ENABLE
3170 /* TODO: really do this? */
3171 periodics_reschedule (EV_A);
3172#endif
3173}
3174
3175/*****************************************************************************/
3176/* singly-linked list management, used when the expected list length is short */
3177
3178inline_size void
3179wlist_add (WL *head, WL elem)
3180{
3181 elem->next = *head;
3182 *head = elem;
3183}
3184
3185inline_size void
3186wlist_del (WL *head, WL elem)
3187{
3188 while (*head)
3189 {
3190 if (expect_true (*head == elem))
3191 {
3192 *head = elem->next;
3193 break;
3194 }
3195
3196 head = &(*head)->next;
3197 }
3198}
3199
3200/* internal, faster, version of ev_clear_pending */
3201inline_speed void
3202clear_pending (EV_P_ W w)
3203{
3204 if (w->pending)
3205 {
3206 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
3207 w->pending = 0;
3208 }
427} 3209}
428 3210
429int 3211int
430ev_version_minor (void) 3212ev_clear_pending (EV_P_ void *w) EV_THROW
431{ 3213{
432 return EV_VERSION_MINOR; 3214 W w_ = (W)w;
433} 3215 int pending = w_->pending;
434 3216
435int ev_init (int flags) 3217 if (expect_true (pending))
436{ 3218 {
437 if (!ev_method) 3219 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3220 p->w = (W)&pending_w;
3221 w_->pending = 0;
3222 return p->events;
438 { 3223 }
439#if HAVE_MONOTONIC 3224 else
3225 return 0;
3226}
3227
3228inline_size void
3229pri_adjust (EV_P_ W w)
3230{
3231 int pri = ev_priority (w);
3232 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3233 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3234 ev_set_priority (w, pri);
3235}
3236
3237inline_speed void
3238ev_start (EV_P_ W w, int active)
3239{
3240 pri_adjust (EV_A_ w);
3241 w->active = active;
3242 ev_ref (EV_A);
3243}
3244
3245inline_size void
3246ev_stop (EV_P_ W w)
3247{
3248 ev_unref (EV_A);
3249 w->active = 0;
3250}
3251
3252/*****************************************************************************/
3253
3254void noinline
3255ev_io_start (EV_P_ ev_io *w) EV_THROW
3256{
3257 int fd = w->fd;
3258
3259 if (expect_false (ev_is_active (w)))
3260 return;
3261
3262 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3263 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3264
3265 EV_FREQUENT_CHECK;
3266
3267 ev_start (EV_A_ (W)w, 1);
3268 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
3269 wlist_add (&anfds[fd].head, (WL)w);
3270
3271 /* common bug, apparently */
3272 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3273
3274 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3275 w->events &= ~EV__IOFDSET;
3276
3277 EV_FREQUENT_CHECK;
3278}
3279
3280void noinline
3281ev_io_stop (EV_P_ ev_io *w) EV_THROW
3282{
3283 clear_pending (EV_A_ (W)w);
3284 if (expect_false (!ev_is_active (w)))
3285 return;
3286
3287 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3288
3289 EV_FREQUENT_CHECK;
3290
3291 wlist_del (&anfds[w->fd].head, (WL)w);
3292 ev_stop (EV_A_ (W)w);
3293
3294 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3295
3296 EV_FREQUENT_CHECK;
3297}
3298
3299void noinline
3300ev_timer_start (EV_P_ ev_timer *w) EV_THROW
3301{
3302 if (expect_false (ev_is_active (w)))
3303 return;
3304
3305 ev_at (w) += mn_now;
3306
3307 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
3308
3309 EV_FREQUENT_CHECK;
3310
3311 ++timercnt;
3312 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
3313 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
3314 ANHE_w (timers [ev_active (w)]) = (WT)w;
3315 ANHE_at_cache (timers [ev_active (w)]);
3316 upheap (timers, ev_active (w));
3317
3318 EV_FREQUENT_CHECK;
3319
3320 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
3321}
3322
3323void noinline
3324ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
3325{
3326 clear_pending (EV_A_ (W)w);
3327 if (expect_false (!ev_is_active (w)))
3328 return;
3329
3330 EV_FREQUENT_CHECK;
3331
3332 {
3333 int active = ev_active (w);
3334
3335 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3336
3337 --timercnt;
3338
3339 if (expect_true (active < timercnt + HEAP0))
440 { 3340 {
441 struct timespec ts; 3341 timers [active] = timers [timercnt + HEAP0];
442 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 3342 adjustheap (timers, timercnt, active);
443 have_monotonic = 1;
444 } 3343 }
445#endif 3344 }
446 3345
447 ev_now = ev_time (); 3346 ev_at (w) -= mn_now;
448 now = get_clock ();
449 diff = ev_now - now;
450 3347
451 if (pipe (sigpipe)) 3348 ev_stop (EV_A_ (W)w);
452 return 0;
453 3349
454 ev_method = EVMETHOD_NONE; 3350 EV_FREQUENT_CHECK;
455#if HAVE_EPOLL 3351}
456 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
457#endif
458#if HAVE_SELECT
459 if (ev_method == EVMETHOD_NONE) select_init (flags);
460#endif
461 3352
462 if (ev_method) 3353void noinline
463 { 3354ev_timer_again (EV_P_ ev_timer *w) EV_THROW
464 ev_watcher_init (&sigev, sigcb); 3355{
465 siginit (); 3356 EV_FREQUENT_CHECK;
466 3357
467 ev_signal_init (&childev, childcb, SIGCHLD); 3358 clear_pending (EV_A_ (W)w);
468 ev_signal_start (&childev); 3359
469 } 3360 if (ev_is_active (w))
470 } 3361 {
471
472 return ev_method;
473}
474
475/*****************************************************************************/
476
477void
478ev_prefork (void)
479{
480 /* nop */
481}
482
483void
484ev_postfork_parent (void)
485{
486 /* nop */
487}
488
489void
490ev_postfork_child (void)
491{
492#if HAVE_EPOLL
493 if (ev_method == EVMETHOD_EPOLL)
494 epoll_postfork_child ();
495#endif
496
497 ev_io_stop (&sigev);
498 close (sigpipe [0]);
499 close (sigpipe [1]);
500 pipe (sigpipe);
501 siginit ();
502}
503
504/*****************************************************************************/
505
506static void
507call_pending (void)
508{
509 while (pendingcnt)
510 {
511 ANPENDING *p = pendings + --pendingcnt;
512
513 if (p->w)
514 {
515 p->w->pending = 0;
516 p->w->cb (p->w, p->events);
517 }
518 }
519}
520
521static void
522timers_reify (void)
523{
524 while (timercnt && timers [0]->at <= now)
525 {
526 struct ev_timer *w = timers [0];
527
528 event ((W)w, EV_TIMEOUT);
529
530 /* first reschedule or stop timer */
531 if (w->repeat) 3362 if (w->repeat)
532 { 3363 {
533 w->at = now + w->repeat; 3364 ev_at (w) = mn_now + w->repeat;
534 assert (("timer timeout in the past, negative repeat?", w->at > now)); 3365 ANHE_at_cache (timers [ev_active (w)]);
535 downheap ((WT *)timers, timercnt, 0); 3366 adjustheap (timers, timercnt, ev_active (w));
536 } 3367 }
537 else 3368 else
538 ev_timer_stop (w); /* nonrepeating: stop timer */ 3369 ev_timer_stop (EV_A_ w);
539 }
540}
541
542static void
543periodics_reify (void)
544{
545 while (periodiccnt && periodics [0]->at <= ev_now)
546 { 3370 }
547 struct ev_periodic *w = periodics [0]; 3371 else if (w->repeat)
3372 {
3373 ev_at (w) = w->repeat;
3374 ev_timer_start (EV_A_ w);
3375 }
548 3376
549 /* first reschedule or stop timer */ 3377 EV_FREQUENT_CHECK;
3378}
3379
3380ev_tstamp
3381ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3382{
3383 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3384}
3385
3386#if EV_PERIODIC_ENABLE
3387void noinline
3388ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
3389{
3390 if (expect_false (ev_is_active (w)))
3391 return;
3392
3393 if (w->reschedule_cb)
3394 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
550 if (w->interval) 3395 else if (w->interval)
3396 {
3397 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
3398 periodic_recalc (EV_A_ w);
3399 }
3400 else
3401 ev_at (w) = w->offset;
3402
3403 EV_FREQUENT_CHECK;
3404
3405 ++periodiccnt;
3406 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
3407 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
3408 ANHE_w (periodics [ev_active (w)]) = (WT)w;
3409 ANHE_at_cache (periodics [ev_active (w)]);
3410 upheap (periodics, ev_active (w));
3411
3412 EV_FREQUENT_CHECK;
3413
3414 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
3415}
3416
3417void noinline
3418ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
3419{
3420 clear_pending (EV_A_ (W)w);
3421 if (expect_false (!ev_is_active (w)))
3422 return;
3423
3424 EV_FREQUENT_CHECK;
3425
3426 {
3427 int active = ev_active (w);
3428
3429 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3430
3431 --periodiccnt;
3432
3433 if (expect_true (active < periodiccnt + HEAP0))
3434 {
3435 periodics [active] = periodics [periodiccnt + HEAP0];
3436 adjustheap (periodics, periodiccnt, active);
3437 }
3438 }
3439
3440 ev_stop (EV_A_ (W)w);
3441
3442 EV_FREQUENT_CHECK;
3443}
3444
3445void noinline
3446ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
3447{
3448 /* TODO: use adjustheap and recalculation */
3449 ev_periodic_stop (EV_A_ w);
3450 ev_periodic_start (EV_A_ w);
3451}
3452#endif
3453
3454#ifndef SA_RESTART
3455# define SA_RESTART 0
3456#endif
3457
3458#if EV_SIGNAL_ENABLE
3459
3460void noinline
3461ev_signal_start (EV_P_ ev_signal *w) EV_THROW
3462{
3463 if (expect_false (ev_is_active (w)))
3464 return;
3465
3466 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3467
3468#if EV_MULTIPLICITY
3469 assert (("libev: a signal must not be attached to two different loops",
3470 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3471
3472 signals [w->signum - 1].loop = EV_A;
3473#endif
3474
3475 EV_FREQUENT_CHECK;
3476
3477#if EV_USE_SIGNALFD
3478 if (sigfd == -2)
3479 {
3480 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3481 if (sigfd < 0 && errno == EINVAL)
3482 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3483
3484 if (sigfd >= 0)
551 { 3485 {
552 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 3486 fd_intern (sigfd); /* doing it twice will not hurt */
553 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 3487
554 downheap ((WT *)periodics, periodiccnt, 0); 3488 sigemptyset (&sigfd_set);
3489
3490 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3491 ev_set_priority (&sigfd_w, EV_MAXPRI);
3492 ev_io_start (EV_A_ &sigfd_w);
3493 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3494 }
3495 }
3496
3497 if (sigfd >= 0)
3498 {
3499 /* TODO: check .head */
3500 sigaddset (&sigfd_set, w->signum);
3501 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3502
3503 signalfd (sigfd, &sigfd_set, 0);
3504 }
3505#endif
3506
3507 ev_start (EV_A_ (W)w, 1);
3508 wlist_add (&signals [w->signum - 1].head, (WL)w);
3509
3510 if (!((WL)w)->next)
3511# if EV_USE_SIGNALFD
3512 if (sigfd < 0) /*TODO*/
3513# endif
3514 {
3515# ifdef _WIN32
3516 evpipe_init (EV_A);
3517
3518 signal (w->signum, ev_sighandler);
3519# else
3520 struct sigaction sa;
3521
3522 evpipe_init (EV_A);
3523
3524 sa.sa_handler = ev_sighandler;
3525 sigfillset (&sa.sa_mask);
3526 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3527 sigaction (w->signum, &sa, 0);
3528
3529 if (origflags & EVFLAG_NOSIGMASK)
3530 {
3531 sigemptyset (&sa.sa_mask);
3532 sigaddset (&sa.sa_mask, w->signum);
3533 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3534 }
3535#endif
3536 }
3537
3538 EV_FREQUENT_CHECK;
3539}
3540
3541void noinline
3542ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
3543{
3544 clear_pending (EV_A_ (W)w);
3545 if (expect_false (!ev_is_active (w)))
3546 return;
3547
3548 EV_FREQUENT_CHECK;
3549
3550 wlist_del (&signals [w->signum - 1].head, (WL)w);
3551 ev_stop (EV_A_ (W)w);
3552
3553 if (!signals [w->signum - 1].head)
3554 {
3555#if EV_MULTIPLICITY
3556 signals [w->signum - 1].loop = 0; /* unattach from signal */
3557#endif
3558#if EV_USE_SIGNALFD
3559 if (sigfd >= 0)
3560 {
3561 sigset_t ss;
3562
3563 sigemptyset (&ss);
3564 sigaddset (&ss, w->signum);
3565 sigdelset (&sigfd_set, w->signum);
3566
3567 signalfd (sigfd, &sigfd_set, 0);
3568 sigprocmask (SIG_UNBLOCK, &ss, 0);
555 } 3569 }
556 else 3570 else
557 ev_periodic_stop (w); /* nonrepeating: stop timer */ 3571#endif
558 3572 signal (w->signum, SIG_DFL);
559 event ((W)w, EV_TIMEOUT);
560 }
561}
562
563static void
564periodics_reschedule (ev_tstamp diff)
565{
566 int i;
567
568 /* adjust periodics after time jump */
569 for (i = 0; i < periodiccnt; ++i)
570 { 3573 }
571 struct ev_periodic *w = periodics [i];
572 3574
573 if (w->interval) 3575 EV_FREQUENT_CHECK;
3576}
3577
3578#endif
3579
3580#if EV_CHILD_ENABLE
3581
3582void
3583ev_child_start (EV_P_ ev_child *w) EV_THROW
3584{
3585#if EV_MULTIPLICITY
3586 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3587#endif
3588 if (expect_false (ev_is_active (w)))
3589 return;
3590
3591 EV_FREQUENT_CHECK;
3592
3593 ev_start (EV_A_ (W)w, 1);
3594 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3595
3596 EV_FREQUENT_CHECK;
3597}
3598
3599void
3600ev_child_stop (EV_P_ ev_child *w) EV_THROW
3601{
3602 clear_pending (EV_A_ (W)w);
3603 if (expect_false (!ev_is_active (w)))
3604 return;
3605
3606 EV_FREQUENT_CHECK;
3607
3608 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3609 ev_stop (EV_A_ (W)w);
3610
3611 EV_FREQUENT_CHECK;
3612}
3613
3614#endif
3615
3616#if EV_STAT_ENABLE
3617
3618# ifdef _WIN32
3619# undef lstat
3620# define lstat(a,b) _stati64 (a,b)
3621# endif
3622
3623#define DEF_STAT_INTERVAL 5.0074891
3624#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3625#define MIN_STAT_INTERVAL 0.1074891
3626
3627static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3628
3629#if EV_USE_INOTIFY
3630
3631/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3632# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3633
3634static void noinline
3635infy_add (EV_P_ ev_stat *w)
3636{
3637 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
3638
3639 if (w->wd >= 0)
3640 {
3641 struct statfs sfs;
3642
3643 /* now local changes will be tracked by inotify, but remote changes won't */
3644 /* unless the filesystem is known to be local, we therefore still poll */
3645 /* also do poll on <2.6.25, but with normal frequency */
3646
3647 if (!fs_2625)
3648 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3649 else if (!statfs (w->path, &sfs)
3650 && (sfs.f_type == 0x1373 /* devfs */
3651 || sfs.f_type == 0xEF53 /* ext2/3 */
3652 || sfs.f_type == 0x3153464a /* jfs */
3653 || sfs.f_type == 0x52654973 /* reiser3 */
3654 || sfs.f_type == 0x01021994 /* tempfs */
3655 || sfs.f_type == 0x58465342 /* xfs */))
3656 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3657 else
3658 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3659 }
3660 else
3661 {
3662 /* can't use inotify, continue to stat */
3663 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3664
3665 /* if path is not there, monitor some parent directory for speedup hints */
3666 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3667 /* but an efficiency issue only */
3668 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
574 { 3669 {
575 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 3670 char path [4096];
3671 strcpy (path, w->path);
576 3672
577 if (fabs (diff) >= 1e-4) 3673 do
578 { 3674 {
579 ev_periodic_stop (w); 3675 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
580 ev_periodic_start (w); 3676 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
581 3677
582 i = 0; /* restart loop, inefficient, but time jumps should be rare */ 3678 char *pend = strrchr (path, '/');
3679
3680 if (!pend || pend == path)
3681 break;
3682
3683 *pend = 0;
3684 w->wd = inotify_add_watch (fs_fd, path, mask);
3685 }
3686 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3687 }
3688 }
3689
3690 if (w->wd >= 0)
3691 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3692
3693 /* now re-arm timer, if required */
3694 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3695 ev_timer_again (EV_A_ &w->timer);
3696 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3697}
3698
3699static void noinline
3700infy_del (EV_P_ ev_stat *w)
3701{
3702 int slot;
3703 int wd = w->wd;
3704
3705 if (wd < 0)
3706 return;
3707
3708 w->wd = -2;
3709 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3710 wlist_del (&fs_hash [slot].head, (WL)w);
3711
3712 /* remove this watcher, if others are watching it, they will rearm */
3713 inotify_rm_watch (fs_fd, wd);
3714}
3715
3716static void noinline
3717infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3718{
3719 if (slot < 0)
3720 /* overflow, need to check for all hash slots */
3721 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3722 infy_wd (EV_A_ slot, wd, ev);
3723 else
3724 {
3725 WL w_;
3726
3727 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3728 {
3729 ev_stat *w = (ev_stat *)w_;
3730 w_ = w_->next; /* lets us remove this watcher and all before it */
3731
3732 if (w->wd == wd || wd == -1)
3733 {
3734 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3735 {
3736 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3737 w->wd = -1;
3738 infy_add (EV_A_ w); /* re-add, no matter what */
3739 }
3740
3741 stat_timer_cb (EV_A_ &w->timer, 0);
583 } 3742 }
584 } 3743 }
585 } 3744 }
586} 3745}
587 3746
588static void 3747static void
589time_update (void) 3748infy_cb (EV_P_ ev_io *w, int revents)
590{ 3749{
3750 char buf [EV_INOTIFY_BUFSIZE];
591 int i; 3751 int ofs;
3752 int len = read (fs_fd, buf, sizeof (buf));
592 3753
593 ev_now = ev_time (); 3754 for (ofs = 0; ofs < len; )
594 3755 {
595 if (have_monotonic) 3756 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3757 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3758 ofs += sizeof (struct inotify_event) + ev->len;
596 { 3759 }
597 ev_tstamp odiff = diff; 3760}
598 3761
599 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 3762inline_size void ecb_cold
3763ev_check_2625 (EV_P)
3764{
3765 /* kernels < 2.6.25 are borked
3766 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3767 */
3768 if (ev_linux_version () < 0x020619)
3769 return;
3770
3771 fs_2625 = 1;
3772}
3773
3774inline_size int
3775infy_newfd (void)
3776{
3777#if defined IN_CLOEXEC && defined IN_NONBLOCK
3778 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3779 if (fd >= 0)
3780 return fd;
3781#endif
3782 return inotify_init ();
3783}
3784
3785inline_size void
3786infy_init (EV_P)
3787{
3788 if (fs_fd != -2)
3789 return;
3790
3791 fs_fd = -1;
3792
3793 ev_check_2625 (EV_A);
3794
3795 fs_fd = infy_newfd ();
3796
3797 if (fs_fd >= 0)
3798 {
3799 fd_intern (fs_fd);
3800 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3801 ev_set_priority (&fs_w, EV_MAXPRI);
3802 ev_io_start (EV_A_ &fs_w);
3803 ev_unref (EV_A);
3804 }
3805}
3806
3807inline_size void
3808infy_fork (EV_P)
3809{
3810 int slot;
3811
3812 if (fs_fd < 0)
3813 return;
3814
3815 ev_ref (EV_A);
3816 ev_io_stop (EV_A_ &fs_w);
3817 close (fs_fd);
3818 fs_fd = infy_newfd ();
3819
3820 if (fs_fd >= 0)
3821 {
3822 fd_intern (fs_fd);
3823 ev_io_set (&fs_w, fs_fd, EV_READ);
3824 ev_io_start (EV_A_ &fs_w);
3825 ev_unref (EV_A);
3826 }
3827
3828 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3829 {
3830 WL w_ = fs_hash [slot].head;
3831 fs_hash [slot].head = 0;
3832
3833 while (w_)
600 { 3834 {
601 now = get_clock (); 3835 ev_stat *w = (ev_stat *)w_;
602 diff = ev_now - now; 3836 w_ = w_->next; /* lets us add this watcher */
603 3837
604 if (fabs (odiff - diff) < MIN_TIMEJUMP) 3838 w->wd = -1;
605 return; /* all is well */
606 3839
607 ev_now = ev_time (); 3840 if (fs_fd >= 0)
3841 infy_add (EV_A_ w); /* re-add, no matter what */
3842 else
3843 {
3844 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3845 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3846 ev_timer_again (EV_A_ &w->timer);
3847 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3848 }
608 } 3849 }
609
610 periodics_reschedule (diff - odiff);
611 /* no timer adjustment, as the monotonic clock doesn't jump */
612 } 3850 }
3851}
3852
3853#endif
3854
3855#ifdef _WIN32
3856# define EV_LSTAT(p,b) _stati64 (p, b)
3857#else
3858# define EV_LSTAT(p,b) lstat (p, b)
3859#endif
3860
3861void
3862ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3863{
3864 if (lstat (w->path, &w->attr) < 0)
3865 w->attr.st_nlink = 0;
3866 else if (!w->attr.st_nlink)
3867 w->attr.st_nlink = 1;
3868}
3869
3870static void noinline
3871stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3872{
3873 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3874
3875 ev_statdata prev = w->attr;
3876 ev_stat_stat (EV_A_ w);
3877
3878 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3879 if (
3880 prev.st_dev != w->attr.st_dev
3881 || prev.st_ino != w->attr.st_ino
3882 || prev.st_mode != w->attr.st_mode
3883 || prev.st_nlink != w->attr.st_nlink
3884 || prev.st_uid != w->attr.st_uid
3885 || prev.st_gid != w->attr.st_gid
3886 || prev.st_rdev != w->attr.st_rdev
3887 || prev.st_size != w->attr.st_size
3888 || prev.st_atime != w->attr.st_atime
3889 || prev.st_mtime != w->attr.st_mtime
3890 || prev.st_ctime != w->attr.st_ctime
3891 ) {
3892 /* we only update w->prev on actual differences */
3893 /* in case we test more often than invoke the callback, */
3894 /* to ensure that prev is always different to attr */
3895 w->prev = prev;
3896
3897 #if EV_USE_INOTIFY
3898 if (fs_fd >= 0)
3899 {
3900 infy_del (EV_A_ w);
3901 infy_add (EV_A_ w);
3902 ev_stat_stat (EV_A_ w); /* avoid race... */
3903 }
3904 #endif
3905
3906 ev_feed_event (EV_A_ w, EV_STAT);
3907 }
3908}
3909
3910void
3911ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3912{
3913 if (expect_false (ev_is_active (w)))
3914 return;
3915
3916 ev_stat_stat (EV_A_ w);
3917
3918 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3919 w->interval = MIN_STAT_INTERVAL;
3920
3921 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3922 ev_set_priority (&w->timer, ev_priority (w));
3923
3924#if EV_USE_INOTIFY
3925 infy_init (EV_A);
3926
3927 if (fs_fd >= 0)
3928 infy_add (EV_A_ w);
613 else 3929 else
3930#endif
3931 {
3932 ev_timer_again (EV_A_ &w->timer);
3933 ev_unref (EV_A);
614 { 3934 }
615 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 3935
3936 ev_start (EV_A_ (W)w, 1);
3937
3938 EV_FREQUENT_CHECK;
3939}
3940
3941void
3942ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3943{
3944 clear_pending (EV_A_ (W)w);
3945 if (expect_false (!ev_is_active (w)))
3946 return;
3947
3948 EV_FREQUENT_CHECK;
3949
3950#if EV_USE_INOTIFY
3951 infy_del (EV_A_ w);
3952#endif
3953
3954 if (ev_is_active (&w->timer))
3955 {
3956 ev_ref (EV_A);
3957 ev_timer_stop (EV_A_ &w->timer);
3958 }
3959
3960 ev_stop (EV_A_ (W)w);
3961
3962 EV_FREQUENT_CHECK;
3963}
3964#endif
3965
3966#if EV_IDLE_ENABLE
3967void
3968ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3969{
3970 if (expect_false (ev_is_active (w)))
3971 return;
3972
3973 pri_adjust (EV_A_ (W)w);
3974
3975 EV_FREQUENT_CHECK;
3976
3977 {
3978 int active = ++idlecnt [ABSPRI (w)];
3979
3980 ++idleall;
3981 ev_start (EV_A_ (W)w, active);
3982
3983 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3984 idles [ABSPRI (w)][active - 1] = w;
3985 }
3986
3987 EV_FREQUENT_CHECK;
3988}
3989
3990void
3991ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3992{
3993 clear_pending (EV_A_ (W)w);
3994 if (expect_false (!ev_is_active (w)))
3995 return;
3996
3997 EV_FREQUENT_CHECK;
3998
3999 {
4000 int active = ev_active (w);
4001
4002 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
4003 ev_active (idles [ABSPRI (w)][active - 1]) = active;
4004
4005 ev_stop (EV_A_ (W)w);
4006 --idleall;
4007 }
4008
4009 EV_FREQUENT_CHECK;
4010}
4011#endif
4012
4013#if EV_PREPARE_ENABLE
4014void
4015ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
4016{
4017 if (expect_false (ev_is_active (w)))
4018 return;
4019
4020 EV_FREQUENT_CHECK;
4021
4022 ev_start (EV_A_ (W)w, ++preparecnt);
4023 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
4024 prepares [preparecnt - 1] = w;
4025
4026 EV_FREQUENT_CHECK;
4027}
4028
4029void
4030ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
4031{
4032 clear_pending (EV_A_ (W)w);
4033 if (expect_false (!ev_is_active (w)))
4034 return;
4035
4036 EV_FREQUENT_CHECK;
4037
4038 {
4039 int active = ev_active (w);
4040
4041 prepares [active - 1] = prepares [--preparecnt];
4042 ev_active (prepares [active - 1]) = active;
4043 }
4044
4045 ev_stop (EV_A_ (W)w);
4046
4047 EV_FREQUENT_CHECK;
4048}
4049#endif
4050
4051#if EV_CHECK_ENABLE
4052void
4053ev_check_start (EV_P_ ev_check *w) EV_THROW
4054{
4055 if (expect_false (ev_is_active (w)))
4056 return;
4057
4058 EV_FREQUENT_CHECK;
4059
4060 ev_start (EV_A_ (W)w, ++checkcnt);
4061 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
4062 checks [checkcnt - 1] = w;
4063
4064 EV_FREQUENT_CHECK;
4065}
4066
4067void
4068ev_check_stop (EV_P_ ev_check *w) EV_THROW
4069{
4070 clear_pending (EV_A_ (W)w);
4071 if (expect_false (!ev_is_active (w)))
4072 return;
4073
4074 EV_FREQUENT_CHECK;
4075
4076 {
4077 int active = ev_active (w);
4078
4079 checks [active - 1] = checks [--checkcnt];
4080 ev_active (checks [active - 1]) = active;
4081 }
4082
4083 ev_stop (EV_A_ (W)w);
4084
4085 EV_FREQUENT_CHECK;
4086}
4087#endif
4088
4089#if EV_EMBED_ENABLE
4090void noinline
4091ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
4092{
4093 ev_run (w->other, EVRUN_NOWAIT);
4094}
4095
4096static void
4097embed_io_cb (EV_P_ ev_io *io, int revents)
4098{
4099 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
4100
4101 if (ev_cb (w))
4102 ev_feed_event (EV_A_ (W)w, EV_EMBED);
4103 else
4104 ev_run (w->other, EVRUN_NOWAIT);
4105}
4106
4107static void
4108embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4109{
4110 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4111
4112 {
4113 EV_P = w->other;
4114
4115 while (fdchangecnt)
616 { 4116 {
617 periodics_reschedule (ev_now - now); 4117 fd_reify (EV_A);
618 4118 ev_run (EV_A_ EVRUN_NOWAIT);
619 /* adjust timers. this is easy, as the offset is the same for all */
620 for (i = 0; i < timercnt; ++i)
621 timers [i]->at += diff;
622 } 4119 }
623
624 now = ev_now;
625 } 4120 }
626} 4121}
627 4122
628int ev_loop_done; 4123static void
629 4124embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
630void ev_loop (int flags)
631{ 4125{
632 double block; 4126 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
633 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
634 4127
635 do 4128 ev_embed_stop (EV_A_ w);
4129
636 { 4130 {
637 /* queue check watchers (and execute them) */ 4131 EV_P = w->other;
638 if (preparecnt)
639 {
640 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
641 call_pending ();
642 }
643 4132
644 /* update fd-related kernel structures */ 4133 ev_loop_fork (EV_A);
645 fd_reify (); 4134 ev_run (EV_A_ EVRUN_NOWAIT);
646
647 /* calculate blocking time */
648
649 /* we only need this for !monotonic clockor timers, but as we basically
650 always have timers, we just calculate it always */
651 ev_now = ev_time ();
652
653 if (flags & EVLOOP_NONBLOCK || idlecnt)
654 block = 0.;
655 else
656 {
657 block = MAX_BLOCKTIME;
658
659 if (timercnt)
660 {
661 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
662 if (block > to) block = to;
663 }
664
665 if (periodiccnt)
666 {
667 ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
668 if (block > to) block = to;
669 }
670
671 if (block < 0.) block = 0.;
672 }
673
674 method_poll (block);
675
676 /* update ev_now, do magic */
677 time_update ();
678
679 /* queue pending timers and reschedule them */
680 timers_reify (); /* relative timers called last */
681 periodics_reify (); /* absolute timers called first */
682
683 /* queue idle watchers unless io or timers are pending */
684 if (!pendingcnt)
685 queue_events ((W *)idles, idlecnt, EV_IDLE);
686
687 /* queue check watchers, to be executed first */
688 if (checkcnt)
689 queue_events ((W *)checks, checkcnt, EV_CHECK);
690
691 call_pending ();
692 } 4135 }
693 while (!ev_loop_done);
694 4136
695 if (ev_loop_done != 2) 4137 ev_embed_start (EV_A_ w);
696 ev_loop_done = 0;
697} 4138}
4139
4140#if 0
4141static void
4142embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4143{
4144 ev_idle_stop (EV_A_ idle);
4145}
4146#endif
4147
4148void
4149ev_embed_start (EV_P_ ev_embed *w) EV_THROW
4150{
4151 if (expect_false (ev_is_active (w)))
4152 return;
4153
4154 {
4155 EV_P = w->other;
4156 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4157 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4158 }
4159
4160 EV_FREQUENT_CHECK;
4161
4162 ev_set_priority (&w->io, ev_priority (w));
4163 ev_io_start (EV_A_ &w->io);
4164
4165 ev_prepare_init (&w->prepare, embed_prepare_cb);
4166 ev_set_priority (&w->prepare, EV_MINPRI);
4167 ev_prepare_start (EV_A_ &w->prepare);
4168
4169 ev_fork_init (&w->fork, embed_fork_cb);
4170 ev_fork_start (EV_A_ &w->fork);
4171
4172 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4173
4174 ev_start (EV_A_ (W)w, 1);
4175
4176 EV_FREQUENT_CHECK;
4177}
4178
4179void
4180ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
4181{
4182 clear_pending (EV_A_ (W)w);
4183 if (expect_false (!ev_is_active (w)))
4184 return;
4185
4186 EV_FREQUENT_CHECK;
4187
4188 ev_io_stop (EV_A_ &w->io);
4189 ev_prepare_stop (EV_A_ &w->prepare);
4190 ev_fork_stop (EV_A_ &w->fork);
4191
4192 ev_stop (EV_A_ (W)w);
4193
4194 EV_FREQUENT_CHECK;
4195}
4196#endif
4197
4198#if EV_FORK_ENABLE
4199void
4200ev_fork_start (EV_P_ ev_fork *w) EV_THROW
4201{
4202 if (expect_false (ev_is_active (w)))
4203 return;
4204
4205 EV_FREQUENT_CHECK;
4206
4207 ev_start (EV_A_ (W)w, ++forkcnt);
4208 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4209 forks [forkcnt - 1] = w;
4210
4211 EV_FREQUENT_CHECK;
4212}
4213
4214void
4215ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
4216{
4217 clear_pending (EV_A_ (W)w);
4218 if (expect_false (!ev_is_active (w)))
4219 return;
4220
4221 EV_FREQUENT_CHECK;
4222
4223 {
4224 int active = ev_active (w);
4225
4226 forks [active - 1] = forks [--forkcnt];
4227 ev_active (forks [active - 1]) = active;
4228 }
4229
4230 ev_stop (EV_A_ (W)w);
4231
4232 EV_FREQUENT_CHECK;
4233}
4234#endif
4235
4236#if EV_CLEANUP_ENABLE
4237void
4238ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4239{
4240 if (expect_false (ev_is_active (w)))
4241 return;
4242
4243 EV_FREQUENT_CHECK;
4244
4245 ev_start (EV_A_ (W)w, ++cleanupcnt);
4246 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4247 cleanups [cleanupcnt - 1] = w;
4248
4249 /* cleanup watchers should never keep a refcount on the loop */
4250 ev_unref (EV_A);
4251 EV_FREQUENT_CHECK;
4252}
4253
4254void
4255ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4256{
4257 clear_pending (EV_A_ (W)w);
4258 if (expect_false (!ev_is_active (w)))
4259 return;
4260
4261 EV_FREQUENT_CHECK;
4262 ev_ref (EV_A);
4263
4264 {
4265 int active = ev_active (w);
4266
4267 cleanups [active - 1] = cleanups [--cleanupcnt];
4268 ev_active (cleanups [active - 1]) = active;
4269 }
4270
4271 ev_stop (EV_A_ (W)w);
4272
4273 EV_FREQUENT_CHECK;
4274}
4275#endif
4276
4277#if EV_ASYNC_ENABLE
4278void
4279ev_async_start (EV_P_ ev_async *w) EV_THROW
4280{
4281 if (expect_false (ev_is_active (w)))
4282 return;
4283
4284 w->sent = 0;
4285
4286 evpipe_init (EV_A);
4287
4288 EV_FREQUENT_CHECK;
4289
4290 ev_start (EV_A_ (W)w, ++asynccnt);
4291 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4292 asyncs [asynccnt - 1] = w;
4293
4294 EV_FREQUENT_CHECK;
4295}
4296
4297void
4298ev_async_stop (EV_P_ ev_async *w) EV_THROW
4299{
4300 clear_pending (EV_A_ (W)w);
4301 if (expect_false (!ev_is_active (w)))
4302 return;
4303
4304 EV_FREQUENT_CHECK;
4305
4306 {
4307 int active = ev_active (w);
4308
4309 asyncs [active - 1] = asyncs [--asynccnt];
4310 ev_active (asyncs [active - 1]) = active;
4311 }
4312
4313 ev_stop (EV_A_ (W)w);
4314
4315 EV_FREQUENT_CHECK;
4316}
4317
4318void
4319ev_async_send (EV_P_ ev_async *w) EV_THROW
4320{
4321 w->sent = 1;
4322 evpipe_write (EV_A_ &async_pending);
4323}
4324#endif
698 4325
699/*****************************************************************************/ 4326/*****************************************************************************/
700 4327
701static void
702wlist_add (WL *head, WL elem)
703{
704 elem->next = *head;
705 *head = elem;
706}
707
708static void
709wlist_del (WL *head, WL elem)
710{
711 while (*head)
712 {
713 if (*head == elem)
714 {
715 *head = elem->next;
716 return;
717 }
718
719 head = &(*head)->next;
720 }
721}
722
723static void
724ev_clear (W w)
725{
726 if (w->pending)
727 {
728 pendings [w->pending - 1].w = 0;
729 w->pending = 0;
730 }
731}
732
733static void
734ev_start (W w, int active)
735{
736 w->active = active;
737}
738
739static void
740ev_stop (W w)
741{
742 w->active = 0;
743}
744
745/*****************************************************************************/
746
747void
748ev_io_start (struct ev_io *w)
749{
750 if (ev_is_active (w))
751 return;
752
753 int fd = w->fd;
754
755 ev_start ((W)w, 1);
756 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
757 wlist_add ((WL *)&anfds[fd].head, (WL)w);
758
759 fd_change (fd);
760}
761
762void
763ev_io_stop (struct ev_io *w)
764{
765 ev_clear ((W)w);
766 if (!ev_is_active (w))
767 return;
768
769 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
770 ev_stop ((W)w);
771
772 fd_change (w->fd);
773}
774
775void
776ev_timer_start (struct ev_timer *w)
777{
778 if (ev_is_active (w))
779 return;
780
781 w->at += now;
782
783 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));
784
785 ev_start ((W)w, ++timercnt);
786 array_needsize (timers, timermax, timercnt, );
787 timers [timercnt - 1] = w;
788 upheap ((WT *)timers, timercnt - 1);
789}
790
791void
792ev_timer_stop (struct ev_timer *w)
793{
794 ev_clear ((W)w);
795 if (!ev_is_active (w))
796 return;
797
798 if (w->active < timercnt--)
799 {
800 timers [w->active - 1] = timers [timercnt];
801 downheap ((WT *)timers, timercnt, w->active - 1);
802 }
803
804 w->at = w->repeat;
805
806 ev_stop ((W)w);
807}
808
809void
810ev_timer_again (struct ev_timer *w)
811{
812 if (ev_is_active (w))
813 {
814 if (w->repeat)
815 {
816 w->at = now + w->repeat;
817 downheap ((WT *)timers, timercnt, w->active - 1);
818 }
819 else
820 ev_timer_stop (w);
821 }
822 else if (w->repeat)
823 ev_timer_start (w);
824}
825
826void
827ev_periodic_start (struct ev_periodic *w)
828{
829 if (ev_is_active (w))
830 return;
831
832 assert (("periodic interval value less than zero not allowed", w->interval >= 0.));
833
834 /* this formula differs from the one in periodic_reify because we do not always round up */
835 if (w->interval)
836 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
837
838 ev_start ((W)w, ++periodiccnt);
839 array_needsize (periodics, periodicmax, periodiccnt, );
840 periodics [periodiccnt - 1] = w;
841 upheap ((WT *)periodics, periodiccnt - 1);
842}
843
844void
845ev_periodic_stop (struct ev_periodic *w)
846{
847 ev_clear ((W)w);
848 if (!ev_is_active (w))
849 return;
850
851 if (w->active < periodiccnt--)
852 {
853 periodics [w->active - 1] = periodics [periodiccnt];
854 downheap ((WT *)periodics, periodiccnt, w->active - 1);
855 }
856
857 ev_stop ((W)w);
858}
859
860void
861ev_signal_start (struct ev_signal *w)
862{
863 if (ev_is_active (w))
864 return;
865
866 ev_start ((W)w, 1);
867 array_needsize (signals, signalmax, w->signum, signals_init);
868 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
869
870 if (!w->next)
871 {
872 struct sigaction sa;
873 sa.sa_handler = sighandler;
874 sigfillset (&sa.sa_mask);
875 sa.sa_flags = 0;
876 sigaction (w->signum, &sa, 0);
877 }
878}
879
880void
881ev_signal_stop (struct ev_signal *w)
882{
883 ev_clear ((W)w);
884 if (!ev_is_active (w))
885 return;
886
887 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
888 ev_stop ((W)w);
889
890 if (!signals [w->signum - 1].head)
891 signal (w->signum, SIG_DFL);
892}
893
894void
895ev_idle_start (struct ev_idle *w)
896{
897 if (ev_is_active (w))
898 return;
899
900 ev_start ((W)w, ++idlecnt);
901 array_needsize (idles, idlemax, idlecnt, );
902 idles [idlecnt - 1] = w;
903}
904
905void
906ev_idle_stop (struct ev_idle *w)
907{
908 ev_clear ((W)w);
909 if (ev_is_active (w))
910 return;
911
912 idles [w->active - 1] = idles [--idlecnt];
913 ev_stop ((W)w);
914}
915
916void
917ev_prepare_start (struct ev_prepare *w)
918{
919 if (ev_is_active (w))
920 return;
921
922 ev_start ((W)w, ++preparecnt);
923 array_needsize (prepares, preparemax, preparecnt, );
924 prepares [preparecnt - 1] = w;
925}
926
927void
928ev_prepare_stop (struct ev_prepare *w)
929{
930 ev_clear ((W)w);
931 if (ev_is_active (w))
932 return;
933
934 prepares [w->active - 1] = prepares [--preparecnt];
935 ev_stop ((W)w);
936}
937
938void
939ev_check_start (struct ev_check *w)
940{
941 if (ev_is_active (w))
942 return;
943
944 ev_start ((W)w, ++checkcnt);
945 array_needsize (checks, checkmax, checkcnt, );
946 checks [checkcnt - 1] = w;
947}
948
949void
950ev_check_stop (struct ev_check *w)
951{
952 ev_clear ((W)w);
953 if (ev_is_active (w))
954 return;
955
956 checks [w->active - 1] = checks [--checkcnt];
957 ev_stop ((W)w);
958}
959
960void
961ev_child_start (struct ev_child *w)
962{
963 if (ev_is_active (w))
964 return;
965
966 ev_start ((W)w, 1);
967 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
968}
969
970void
971ev_child_stop (struct ev_child *w)
972{
973 ev_clear ((W)w);
974 if (ev_is_active (w))
975 return;
976
977 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
978 ev_stop ((W)w);
979}
980
981/*****************************************************************************/
982
983struct ev_once 4328struct ev_once
984{ 4329{
985 struct ev_io io; 4330 ev_io io;
986 struct ev_timer to; 4331 ev_timer to;
987 void (*cb)(int revents, void *arg); 4332 void (*cb)(int revents, void *arg);
988 void *arg; 4333 void *arg;
989}; 4334};
990 4335
991static void 4336static void
992once_cb (struct ev_once *once, int revents) 4337once_cb (EV_P_ struct ev_once *once, int revents)
993{ 4338{
994 void (*cb)(int revents, void *arg) = once->cb; 4339 void (*cb)(int revents, void *arg) = once->cb;
995 void *arg = once->arg; 4340 void *arg = once->arg;
996 4341
997 ev_io_stop (&once->io); 4342 ev_io_stop (EV_A_ &once->io);
998 ev_timer_stop (&once->to); 4343 ev_timer_stop (EV_A_ &once->to);
999 free (once); 4344 ev_free (once);
1000 4345
1001 cb (revents, arg); 4346 cb (revents, arg);
1002} 4347}
1003 4348
1004static void 4349static void
1005once_cb_io (struct ev_io *w, int revents) 4350once_cb_io (EV_P_ ev_io *w, int revents)
1006{ 4351{
1007 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4352 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4353
4354 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1008} 4355}
1009 4356
1010static void 4357static void
1011once_cb_to (struct ev_timer *w, int revents) 4358once_cb_to (EV_P_ ev_timer *w, int revents)
1012{ 4359{
1013 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4360 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4361
4362 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1014} 4363}
1015 4364
1016void 4365void
1017ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4366ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
1018{ 4367{
1019 struct ev_once *once = malloc (sizeof (struct ev_once)); 4368 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1020 4369
1021 if (!once) 4370 if (expect_false (!once))
1022 cb (EV_ERROR, arg); 4371 {
1023 else 4372 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
4373 return;
1024 { 4374 }
4375
1025 once->cb = cb; 4376 once->cb = cb;
1026 once->arg = arg; 4377 once->arg = arg;
1027 4378
1028 ev_watcher_init (&once->io, once_cb_io); 4379 ev_init (&once->io, once_cb_io);
1029
1030 if (fd >= 0) 4380 if (fd >= 0)
4381 {
4382 ev_io_set (&once->io, fd, events);
4383 ev_io_start (EV_A_ &once->io);
4384 }
4385
4386 ev_init (&once->to, once_cb_to);
4387 if (timeout >= 0.)
4388 {
4389 ev_timer_set (&once->to, timeout, 0.);
4390 ev_timer_start (EV_A_ &once->to);
4391 }
4392}
4393
4394/*****************************************************************************/
4395
4396#if EV_WALK_ENABLE
4397void ecb_cold
4398ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4399{
4400 int i, j;
4401 ev_watcher_list *wl, *wn;
4402
4403 if (types & (EV_IO | EV_EMBED))
4404 for (i = 0; i < anfdmax; ++i)
4405 for (wl = anfds [i].head; wl; )
1031 { 4406 {
1032 ev_io_set (&once->io, fd, events); 4407 wn = wl->next;
1033 ev_io_start (&once->io); 4408
4409#if EV_EMBED_ENABLE
4410 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4411 {
4412 if (types & EV_EMBED)
4413 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4414 }
4415 else
4416#endif
4417#if EV_USE_INOTIFY
4418 if (ev_cb ((ev_io *)wl) == infy_cb)
4419 ;
4420 else
4421#endif
4422 if ((ev_io *)wl != &pipe_w)
4423 if (types & EV_IO)
4424 cb (EV_A_ EV_IO, wl);
4425
4426 wl = wn;
1034 } 4427 }
1035 4428
1036 ev_watcher_init (&once->to, once_cb_to); 4429 if (types & (EV_TIMER | EV_STAT))
1037 4430 for (i = timercnt + HEAP0; i-- > HEAP0; )
1038 if (timeout >= 0.) 4431#if EV_STAT_ENABLE
4432 /*TODO: timer is not always active*/
4433 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1039 { 4434 {
1040 ev_timer_set (&once->to, timeout, 0.); 4435 if (types & EV_STAT)
1041 ev_timer_start (&once->to); 4436 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1042 } 4437 }
1043 } 4438 else
1044} 4439#endif
4440 if (types & EV_TIMER)
4441 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1045 4442
1046/*****************************************************************************/ 4443#if EV_PERIODIC_ENABLE
4444 if (types & EV_PERIODIC)
4445 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4446 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4447#endif
1047 4448
1048#if 0 4449#if EV_IDLE_ENABLE
4450 if (types & EV_IDLE)
4451 for (j = NUMPRI; j--; )
4452 for (i = idlecnt [j]; i--; )
4453 cb (EV_A_ EV_IDLE, idles [j][i]);
4454#endif
1049 4455
1050struct ev_io wio; 4456#if EV_FORK_ENABLE
4457 if (types & EV_FORK)
4458 for (i = forkcnt; i--; )
4459 if (ev_cb (forks [i]) != embed_fork_cb)
4460 cb (EV_A_ EV_FORK, forks [i]);
4461#endif
1051 4462
1052static void 4463#if EV_ASYNC_ENABLE
1053sin_cb (struct ev_io *w, int revents) 4464 if (types & EV_ASYNC)
1054{ 4465 for (i = asynccnt; i--; )
1055 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 4466 cb (EV_A_ EV_ASYNC, asyncs [i]);
1056} 4467#endif
1057 4468
1058static void 4469#if EV_PREPARE_ENABLE
1059ocb (struct ev_timer *w, int revents) 4470 if (types & EV_PREPARE)
1060{ 4471 for (i = preparecnt; i--; )
1061 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 4472# if EV_EMBED_ENABLE
1062 ev_timer_stop (w); 4473 if (ev_cb (prepares [i]) != embed_prepare_cb)
1063 ev_timer_start (w);
1064}
1065
1066static void
1067scb (struct ev_signal *w, int revents)
1068{
1069 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1070 ev_io_stop (&wio);
1071 ev_io_start (&wio);
1072}
1073
1074static void
1075gcb (struct ev_signal *w, int revents)
1076{
1077 fprintf (stderr, "generic %x\n", revents);
1078
1079}
1080
1081int main (void)
1082{
1083 ev_init (0);
1084
1085 ev_io_init (&wio, sin_cb, 0, EV_READ);
1086 ev_io_start (&wio);
1087
1088 struct ev_timer t[10000];
1089
1090#if 0
1091 int i;
1092 for (i = 0; i < 10000; ++i)
1093 {
1094 struct ev_timer *w = t + i;
1095 ev_watcher_init (w, ocb, i);
1096 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1097 ev_timer_start (w);
1098 if (drand48 () < 0.5)
1099 ev_timer_stop (w);
1100 }
1101#endif 4474# endif
1102 4475 cb (EV_A_ EV_PREPARE, prepares [i]);
1103 struct ev_timer t1;
1104 ev_timer_init (&t1, ocb, 5, 10);
1105 ev_timer_start (&t1);
1106
1107 struct ev_signal sig;
1108 ev_signal_init (&sig, scb, SIGQUIT);
1109 ev_signal_start (&sig);
1110
1111 struct ev_check cw;
1112 ev_check_init (&cw, gcb);
1113 ev_check_start (&cw);
1114
1115 struct ev_idle iw;
1116 ev_idle_init (&iw, gcb);
1117 ev_idle_start (&iw);
1118
1119 ev_loop (0);
1120
1121 return 0;
1122}
1123
1124#endif 4476#endif
1125 4477
4478#if EV_CHECK_ENABLE
4479 if (types & EV_CHECK)
4480 for (i = checkcnt; i--; )
4481 cb (EV_A_ EV_CHECK, checks [i]);
4482#endif
1126 4483
4484#if EV_SIGNAL_ENABLE
4485 if (types & EV_SIGNAL)
4486 for (i = 0; i < EV_NSIG - 1; ++i)
4487 for (wl = signals [i].head; wl; )
4488 {
4489 wn = wl->next;
4490 cb (EV_A_ EV_SIGNAL, wl);
4491 wl = wn;
4492 }
4493#endif
1127 4494
4495#if EV_CHILD_ENABLE
4496 if (types & EV_CHILD)
4497 for (i = (EV_PID_HASHSIZE); i--; )
4498 for (wl = childs [i]; wl; )
4499 {
4500 wn = wl->next;
4501 cb (EV_A_ EV_CHILD, wl);
4502 wl = wn;
4503 }
4504#endif
4505/* EV_STAT 0x00001000 /* stat data changed */
4506/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4507}
4508#endif
1128 4509
4510#if EV_MULTIPLICITY
4511 #include "ev_wrap.h"
4512#endif
4513

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