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Comparing libev/ev.c (file contents):
Revision 1.34 by root, Thu Nov 1 11:43:11 2007 UTC vs.
Revision 1.426 by root, Sun May 6 13:42:10 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 */
39
40/* this big block deduces configuration from config.h */
41#ifndef EV_STANDALONE
29#if EV_USE_CONFIG_H 42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H
44# else
30# include "config.h" 45# include "config.h"
31#endif 46# endif
32 47
33#include <math.h> 48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined EV_USE_CLOCK_SYSCALL
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
67
68# if HAVE_CLOCK_GETTIME
69# ifndef EV_USE_MONOTONIC
70# define EV_USE_MONOTONIC 1
71# endif
72# ifndef EV_USE_REALTIME
73# define EV_USE_REALTIME 0
74# endif
75# else
76# ifndef EV_USE_MONOTONIC
77# define EV_USE_MONOTONIC 0
78# endif
79# ifndef EV_USE_REALTIME
80# define EV_USE_REALTIME 0
81# endif
82# endif
83
84# if HAVE_NANOSLEEP
85# ifndef EV_USE_NANOSLEEP
86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
88# else
89# undef EV_USE_NANOSLEEP
90# define EV_USE_NANOSLEEP 0
91# endif
92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
94# ifndef EV_USE_SELECT
95# define EV_USE_SELECT EV_FEATURE_BACKENDS
96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
100# endif
101
102# if HAVE_POLL && HAVE_POLL_H
103# ifndef EV_USE_POLL
104# define EV_USE_POLL EV_FEATURE_BACKENDS
105# endif
106# else
107# undef EV_USE_POLL
108# define EV_USE_POLL 0
109# endif
110
111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
112# ifndef EV_USE_EPOLL
113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
118# endif
119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
121# ifndef EV_USE_KQUEUE
122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
127# endif
128
129# if HAVE_PORT_H && HAVE_PORT_CREATE
130# ifndef EV_USE_PORT
131# define EV_USE_PORT EV_FEATURE_BACKENDS
132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
136# endif
137
138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
139# ifndef EV_USE_INOTIFY
140# define EV_USE_INOTIFY EV_FEATURE_OS
141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
145# endif
146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
149# define EV_USE_SIGNALFD EV_FEATURE_OS
150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
154# endif
155
156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
163# endif
164
165#endif
166
34#include <stdlib.h> 167#include <stdlib.h>
35#include <unistd.h> 168#include <string.h>
36#include <fcntl.h> 169#include <fcntl.h>
37#include <signal.h>
38#include <stddef.h> 170#include <stddef.h>
39 171
40#include <stdio.h> 172#include <stdio.h>
41 173
42#include <assert.h> 174#include <assert.h>
43#include <errno.h> 175#include <errno.h>
44#include <sys/types.h> 176#include <sys/types.h>
45#include <sys/wait.h>
46#include <sys/time.h>
47#include <time.h> 177#include <time.h>
178#include <limits.h>
179
180#include <signal.h>
181
182#ifdef EV_H
183# include EV_H
184#else
185# include "ev.h"
186#endif
187
188#if EV_NO_THREADS
189# undef EV_NO_SMP
190# define EV_NO_SMP 1
191# undef ECB_NO_THREADS
192# define ECB_NO_THREADS 1
193#endif
194#if EV_NO_SMP
195# undef EV_NO_SMP
196# define ECB_NO_SMP 1
197#endif
198
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# ifndef EV_SELECT_IS_WINSOCKET
208# define EV_SELECT_IS_WINSOCKET 1
209# endif
210# undef EV_AVOID_STDIO
211#endif
212
213/* OS X, in its infinite idiocy, actually HARDCODES
214 * a limit of 1024 into their select. Where people have brains,
215 * OS X engineers apparently have a vacuum. Or maybe they were
216 * ordered to have a vacuum, or they do anything for money.
217 * This might help. Or not.
218 */
219#define _DARWIN_UNLIMITED_SELECT 1
220
221/* this block tries to deduce configuration from header-defined symbols and defaults */
222
223/* try to deduce the maximum number of signals on this platform */
224#if defined EV_NSIG
225/* use what's provided */
226#elif defined NSIG
227# define EV_NSIG (NSIG)
228#elif defined _NSIG
229# define EV_NSIG (_NSIG)
230#elif defined SIGMAX
231# define EV_NSIG (SIGMAX+1)
232#elif defined SIG_MAX
233# define EV_NSIG (SIG_MAX+1)
234#elif defined _SIG_MAX
235# define EV_NSIG (_SIG_MAX+1)
236#elif defined MAXSIG
237# define EV_NSIG (MAXSIG+1)
238#elif defined MAX_SIG
239# define EV_NSIG (MAX_SIG+1)
240#elif defined SIGARRAYSIZE
241# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
242#elif defined _sys_nsig
243# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
244#else
245# error "unable to find value for NSIG, please report"
246/* to make it compile regardless, just remove the above line, */
247/* but consider reporting it, too! :) */
248# define EV_NSIG 65
249#endif
250
251#ifndef EV_USE_FLOOR
252# define EV_USE_FLOOR 0
253#endif
254
255#ifndef EV_USE_CLOCK_SYSCALL
256# if __linux && __GLIBC__ >= 2
257# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
258# else
259# define EV_USE_CLOCK_SYSCALL 0
260# endif
261#endif
48 262
49#ifndef EV_USE_MONOTONIC 263#ifndef EV_USE_MONOTONIC
50# ifdef CLOCK_MONOTONIC 264# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
265# define EV_USE_MONOTONIC EV_FEATURE_OS
266# else
267# define EV_USE_MONOTONIC 0
268# endif
269#endif
270
271#ifndef EV_USE_REALTIME
272# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
273#endif
274
275#ifndef EV_USE_NANOSLEEP
276# if _POSIX_C_SOURCE >= 199309L
277# define EV_USE_NANOSLEEP EV_FEATURE_OS
278# else
279# define EV_USE_NANOSLEEP 0
280# endif
281#endif
282
283#ifndef EV_USE_SELECT
284# define EV_USE_SELECT EV_FEATURE_BACKENDS
285#endif
286
287#ifndef EV_USE_POLL
288# ifdef _WIN32
289# define EV_USE_POLL 0
290# else
291# define EV_USE_POLL EV_FEATURE_BACKENDS
292# endif
293#endif
294
295#ifndef EV_USE_EPOLL
296# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
297# define EV_USE_EPOLL EV_FEATURE_BACKENDS
298# else
299# define EV_USE_EPOLL 0
300# endif
301#endif
302
303#ifndef EV_USE_KQUEUE
304# define EV_USE_KQUEUE 0
305#endif
306
307#ifndef EV_USE_PORT
308# define EV_USE_PORT 0
309#endif
310
311#ifndef EV_USE_INOTIFY
312# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
313# define EV_USE_INOTIFY EV_FEATURE_OS
314# else
315# define EV_USE_INOTIFY 0
316# endif
317#endif
318
319#ifndef EV_PID_HASHSIZE
320# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
321#endif
322
323#ifndef EV_INOTIFY_HASHSIZE
324# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
325#endif
326
327#ifndef EV_USE_EVENTFD
328# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
329# define EV_USE_EVENTFD EV_FEATURE_OS
330# else
331# define EV_USE_EVENTFD 0
332# endif
333#endif
334
335#ifndef EV_USE_SIGNALFD
336# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
337# define EV_USE_SIGNALFD EV_FEATURE_OS
338# else
339# define EV_USE_SIGNALFD 0
340# endif
341#endif
342
343#if 0 /* debugging */
344# define EV_VERIFY 3
345# define EV_USE_4HEAP 1
346# define EV_HEAP_CACHE_AT 1
347#endif
348
349#ifndef EV_VERIFY
350# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
351#endif
352
353#ifndef EV_USE_4HEAP
354# define EV_USE_4HEAP EV_FEATURE_DATA
355#endif
356
357#ifndef EV_HEAP_CACHE_AT
358# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
359#endif
360
361/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
362/* which makes programs even slower. might work on other unices, too. */
363#if EV_USE_CLOCK_SYSCALL
364# include <sys/syscall.h>
365# ifdef SYS_clock_gettime
366# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
367# undef EV_USE_MONOTONIC
51# define EV_USE_MONOTONIC 1 368# define EV_USE_MONOTONIC 1
369# else
370# undef EV_USE_CLOCK_SYSCALL
371# define EV_USE_CLOCK_SYSCALL 0
52# endif 372# endif
53#endif 373#endif
54 374
55#ifndef EV_USE_SELECT 375/* this block fixes any misconfiguration where we know we run into trouble otherwise */
56# define EV_USE_SELECT 1
57#endif
58 376
377#ifdef _AIX
378/* AIX has a completely broken poll.h header */
59#ifndef EV_USE_EPOLL 379# undef EV_USE_POLL
60# define EV_USE_EPOLL 0 380# define EV_USE_POLL 0
381#endif
382
383#ifndef CLOCK_MONOTONIC
384# undef EV_USE_MONOTONIC
385# define EV_USE_MONOTONIC 0
61#endif 386#endif
62 387
63#ifndef CLOCK_REALTIME 388#ifndef CLOCK_REALTIME
389# undef EV_USE_REALTIME
64# define EV_USE_REALTIME 0 390# define EV_USE_REALTIME 0
65#endif 391#endif
66#ifndef EV_USE_REALTIME 392
67# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */ 393#if !EV_STAT_ENABLE
394# undef EV_USE_INOTIFY
395# define EV_USE_INOTIFY 0
396#endif
397
398#if !EV_USE_NANOSLEEP
399/* hp-ux has it in sys/time.h, which we unconditionally include above */
400# if !defined _WIN32 && !defined __hpux
401# include <sys/select.h>
68#endif 402# endif
403#endif
404
405#if EV_USE_INOTIFY
406# include <sys/statfs.h>
407# include <sys/inotify.h>
408/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
409# ifndef IN_DONT_FOLLOW
410# undef EV_USE_INOTIFY
411# define EV_USE_INOTIFY 0
412# endif
413#endif
414
415#if EV_SELECT_IS_WINSOCKET
416# include <winsock.h>
417#endif
418
419#if EV_USE_EVENTFD
420/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
421# include <stdint.h>
422# ifndef EFD_NONBLOCK
423# define EFD_NONBLOCK O_NONBLOCK
424# endif
425# ifndef EFD_CLOEXEC
426# ifdef O_CLOEXEC
427# define EFD_CLOEXEC O_CLOEXEC
428# else
429# define EFD_CLOEXEC 02000000
430# endif
431# endif
432EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
433#endif
434
435#if EV_USE_SIGNALFD
436/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
437# include <stdint.h>
438# ifndef SFD_NONBLOCK
439# define SFD_NONBLOCK O_NONBLOCK
440# endif
441# ifndef SFD_CLOEXEC
442# ifdef O_CLOEXEC
443# define SFD_CLOEXEC O_CLOEXEC
444# else
445# define SFD_CLOEXEC 02000000
446# endif
447# endif
448EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
449
450struct signalfd_siginfo
451{
452 uint32_t ssi_signo;
453 char pad[128 - sizeof (uint32_t)];
454};
455#endif
456
457/**/
458
459#if EV_VERIFY >= 3
460# define EV_FREQUENT_CHECK ev_verify (EV_A)
461#else
462# define EV_FREQUENT_CHECK do { } while (0)
463#endif
464
465/*
466 * This is used to work around floating point rounding problems.
467 * This value is good at least till the year 4000.
468 */
469#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
470/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
69 471
70#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 472#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
71#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */ 473#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
72#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
73#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */
74 474
75#include "ev.h" 475#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
476#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
76 477
77typedef struct ev_watcher *W; 478/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
78typedef struct ev_watcher_list *WL; 479/* ECB.H BEGIN */
79typedef struct ev_watcher_time *WT; 480/*
481 * libecb - http://software.schmorp.de/pkg/libecb
482 *
483 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
484 * Copyright (©) 2011 Emanuele Giaquinta
485 * All rights reserved.
486 *
487 * Redistribution and use in source and binary forms, with or without modifica-
488 * tion, are permitted provided that the following conditions are met:
489 *
490 * 1. Redistributions of source code must retain the above copyright notice,
491 * this list of conditions and the following disclaimer.
492 *
493 * 2. Redistributions in binary form must reproduce the above copyright
494 * notice, this list of conditions and the following disclaimer in the
495 * documentation and/or other materials provided with the distribution.
496 *
497 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
498 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
499 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
500 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
501 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
502 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
503 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
504 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
505 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
506 * OF THE POSSIBILITY OF SUCH DAMAGE.
507 */
80 508
81static ev_tstamp now, diff; /* monotonic clock */ 509#ifndef ECB_H
82ev_tstamp ev_now; 510#define ECB_H
83int ev_method;
84 511
85static int have_monotonic; /* runtime */ 512#ifdef _WIN32
513 typedef signed char int8_t;
514 typedef unsigned char uint8_t;
515 typedef signed short int16_t;
516 typedef unsigned short uint16_t;
517 typedef signed int int32_t;
518 typedef unsigned int uint32_t;
519 #if __GNUC__
520 typedef signed long long int64_t;
521 typedef unsigned long long uint64_t;
522 #else /* _MSC_VER || __BORLANDC__ */
523 typedef signed __int64 int64_t;
524 typedef unsigned __int64 uint64_t;
525 #endif
526#else
527 #include <inttypes.h>
528#endif
86 529
87static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 530/* many compilers define _GNUC_ to some versions but then only implement
88static void (*method_modify)(int fd, int oev, int nev); 531 * what their idiot authors think are the "more important" extensions,
89static void (*method_poll)(ev_tstamp timeout); 532 * causing enormous grief in return for some better fake benchmark numbers.
533 * or so.
534 * we try to detect these and simply assume they are not gcc - if they have
535 * an issue with that they should have done it right in the first place.
536 */
537#ifndef ECB_GCC_VERSION
538 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
539 #define ECB_GCC_VERSION(major,minor) 0
540 #else
541 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
542 #endif
543#endif
90 544
91/*****************************************************************************/ 545/*****************************************************************************/
92 546
547/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
548/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
549
550#if ECB_NO_THREADS
551# define ECB_NO_SMP 1
552#endif
553
554#if ECB_NO_THREADS || ECB_NO_SMP
555 #define ECB_MEMORY_FENCE do { } while (0)
556#endif
557
558#ifndef ECB_MEMORY_FENCE
559 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
560 #if __i386 || __i386__
561 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
562 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
563 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
564 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
565 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
566 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
567 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
568 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
569 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
570 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
571 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
572 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
573 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
574 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
575 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
576 #elif __sparc || __sparc__
577 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad | " : : : "memory")
578 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
579 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
580 #elif defined __s390__ || defined __s390x__
581 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
582 #elif defined __mips__
583 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
584 #elif defined __alpha__
585 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
586 #endif
587 #endif
588#endif
589
590#ifndef ECB_MEMORY_FENCE
591 #if ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
592 #define ECB_MEMORY_FENCE __sync_synchronize ()
593 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
594 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
595 #elif _MSC_VER >= 1400 /* VC++ 2005 */
596 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
597 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
598 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
599 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
600 #elif defined _WIN32
601 #include <WinNT.h>
602 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
603 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
604 #include <mbarrier.h>
605 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
606 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
607 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
608 #elif __xlC__
609 #define ECB_MEMORY_FENCE __sync ()
610 #endif
611#endif
612
613#ifndef ECB_MEMORY_FENCE
614 #if !ECB_AVOID_PTHREADS
615 /*
616 * if you get undefined symbol references to pthread_mutex_lock,
617 * or failure to find pthread.h, then you should implement
618 * the ECB_MEMORY_FENCE operations for your cpu/compiler
619 * OR provide pthread.h and link against the posix thread library
620 * of your system.
621 */
622 #include <pthread.h>
623 #define ECB_NEEDS_PTHREADS 1
624 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
625
626 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
627 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
628 #endif
629#endif
630
631#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
632 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
633#endif
634
635#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
636 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
637#endif
638
639/*****************************************************************************/
640
641#define ECB_C99 (__STDC_VERSION__ >= 199901L)
642
643#if __cplusplus
644 #define ecb_inline static inline
645#elif ECB_GCC_VERSION(2,5)
646 #define ecb_inline static __inline__
647#elif ECB_C99
648 #define ecb_inline static inline
649#else
650 #define ecb_inline static
651#endif
652
653#if ECB_GCC_VERSION(3,3)
654 #define ecb_restrict __restrict__
655#elif ECB_C99
656 #define ecb_restrict restrict
657#else
658 #define ecb_restrict
659#endif
660
661typedef int ecb_bool;
662
663#define ECB_CONCAT_(a, b) a ## b
664#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
665#define ECB_STRINGIFY_(a) # a
666#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
667
668#define ecb_function_ ecb_inline
669
670#if ECB_GCC_VERSION(3,1)
671 #define ecb_attribute(attrlist) __attribute__(attrlist)
672 #define ecb_is_constant(expr) __builtin_constant_p (expr)
673 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
674 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
675#else
676 #define ecb_attribute(attrlist)
677 #define ecb_is_constant(expr) 0
678 #define ecb_expect(expr,value) (expr)
679 #define ecb_prefetch(addr,rw,locality)
680#endif
681
682/* no emulation for ecb_decltype */
683#if ECB_GCC_VERSION(4,5)
684 #define ecb_decltype(x) __decltype(x)
685#elif ECB_GCC_VERSION(3,0)
686 #define ecb_decltype(x) __typeof(x)
687#endif
688
689#define ecb_noinline ecb_attribute ((__noinline__))
690#define ecb_noreturn ecb_attribute ((__noreturn__))
691#define ecb_unused ecb_attribute ((__unused__))
692#define ecb_const ecb_attribute ((__const__))
693#define ecb_pure ecb_attribute ((__pure__))
694
695#if ECB_GCC_VERSION(4,3)
696 #define ecb_artificial ecb_attribute ((__artificial__))
697 #define ecb_hot ecb_attribute ((__hot__))
698 #define ecb_cold ecb_attribute ((__cold__))
699#else
700 #define ecb_artificial
701 #define ecb_hot
702 #define ecb_cold
703#endif
704
705/* put around conditional expressions if you are very sure that the */
706/* expression is mostly true or mostly false. note that these return */
707/* booleans, not the expression. */
708#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
709#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
710/* for compatibility to the rest of the world */
711#define ecb_likely(expr) ecb_expect_true (expr)
712#define ecb_unlikely(expr) ecb_expect_false (expr)
713
714/* count trailing zero bits and count # of one bits */
715#if ECB_GCC_VERSION(3,4)
716 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
717 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
718 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
719 #define ecb_ctz32(x) __builtin_ctz (x)
720 #define ecb_ctz64(x) __builtin_ctzll (x)
721 #define ecb_popcount32(x) __builtin_popcount (x)
722 /* no popcountll */
723#else
724 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
725 ecb_function_ int
726 ecb_ctz32 (uint32_t x)
727 {
728 int r = 0;
729
730 x &= ~x + 1; /* this isolates the lowest bit */
731
732#if ECB_branchless_on_i386
733 r += !!(x & 0xaaaaaaaa) << 0;
734 r += !!(x & 0xcccccccc) << 1;
735 r += !!(x & 0xf0f0f0f0) << 2;
736 r += !!(x & 0xff00ff00) << 3;
737 r += !!(x & 0xffff0000) << 4;
738#else
739 if (x & 0xaaaaaaaa) r += 1;
740 if (x & 0xcccccccc) r += 2;
741 if (x & 0xf0f0f0f0) r += 4;
742 if (x & 0xff00ff00) r += 8;
743 if (x & 0xffff0000) r += 16;
744#endif
745
746 return r;
747 }
748
749 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
750 ecb_function_ int
751 ecb_ctz64 (uint64_t x)
752 {
753 int shift = x & 0xffffffffU ? 0 : 32;
754 return ecb_ctz32 (x >> shift) + shift;
755 }
756
757 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
758 ecb_function_ int
759 ecb_popcount32 (uint32_t x)
760 {
761 x -= (x >> 1) & 0x55555555;
762 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
763 x = ((x >> 4) + x) & 0x0f0f0f0f;
764 x *= 0x01010101;
765
766 return x >> 24;
767 }
768
769 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
770 ecb_function_ int ecb_ld32 (uint32_t x)
771 {
772 int r = 0;
773
774 if (x >> 16) { x >>= 16; r += 16; }
775 if (x >> 8) { x >>= 8; r += 8; }
776 if (x >> 4) { x >>= 4; r += 4; }
777 if (x >> 2) { x >>= 2; r += 2; }
778 if (x >> 1) { r += 1; }
779
780 return r;
781 }
782
783 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
784 ecb_function_ int ecb_ld64 (uint64_t x)
785 {
786 int r = 0;
787
788 if (x >> 32) { x >>= 32; r += 32; }
789
790 return r + ecb_ld32 (x);
791 }
792#endif
793
794ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
795ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
796{
797 return ( (x * 0x0802U & 0x22110U)
798 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
799}
800
801ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
802ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
803{
804 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
805 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
806 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
807 x = ( x >> 8 ) | ( x << 8);
808
809 return x;
810}
811
812ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
813ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
814{
815 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
816 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
817 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
818 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
819 x = ( x >> 16 ) | ( x << 16);
820
821 return x;
822}
823
824/* popcount64 is only available on 64 bit cpus as gcc builtin */
825/* so for this version we are lazy */
826ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
827ecb_function_ int
828ecb_popcount64 (uint64_t x)
829{
830 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
831}
832
833ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
834ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
835ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
836ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
837ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
838ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
839ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
840ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
841
842ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
843ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
844ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
845ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
846ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
847ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
848ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
849ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
850
851#if ECB_GCC_VERSION(4,3)
852 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
853 #define ecb_bswap32(x) __builtin_bswap32 (x)
854 #define ecb_bswap64(x) __builtin_bswap64 (x)
855#else
856 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
857 ecb_function_ uint16_t
858 ecb_bswap16 (uint16_t x)
859 {
860 return ecb_rotl16 (x, 8);
861 }
862
863 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
864 ecb_function_ uint32_t
865 ecb_bswap32 (uint32_t x)
866 {
867 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
868 }
869
870 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
871 ecb_function_ uint64_t
872 ecb_bswap64 (uint64_t x)
873 {
874 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
875 }
876#endif
877
878#if ECB_GCC_VERSION(4,5)
879 #define ecb_unreachable() __builtin_unreachable ()
880#else
881 /* this seems to work fine, but gcc always emits a warning for it :/ */
882 ecb_inline void ecb_unreachable (void) ecb_noreturn;
883 ecb_inline void ecb_unreachable (void) { }
884#endif
885
886/* try to tell the compiler that some condition is definitely true */
887#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
888
889ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
890ecb_inline unsigned char
891ecb_byteorder_helper (void)
892{
893 const uint32_t u = 0x11223344;
894 return *(unsigned char *)&u;
895}
896
897ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
898ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
899ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
900ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
901
902#if ECB_GCC_VERSION(3,0) || ECB_C99
903 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
904#else
905 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
906#endif
907
908#if __cplusplus
909 template<typename T>
910 static inline T ecb_div_rd (T val, T div)
911 {
912 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
913 }
914 template<typename T>
915 static inline T ecb_div_ru (T val, T div)
916 {
917 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
918 }
919#else
920 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
921 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
922#endif
923
924#if ecb_cplusplus_does_not_suck
925 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
926 template<typename T, int N>
927 static inline int ecb_array_length (const T (&arr)[N])
928 {
929 return N;
930 }
931#else
932 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
933#endif
934
935#endif
936
937/* ECB.H END */
938
939#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
940/* if your architecture doesn't need memory fences, e.g. because it is
941 * single-cpu/core, or if you use libev in a project that doesn't use libev
942 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
943 * libev, in which cases the memory fences become nops.
944 * alternatively, you can remove this #error and link against libpthread,
945 * which will then provide the memory fences.
946 */
947# error "memory fences not defined for your architecture, please report"
948#endif
949
950#ifndef ECB_MEMORY_FENCE
951# define ECB_MEMORY_FENCE do { } while (0)
952# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
953# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
954#endif
955
956#define expect_false(cond) ecb_expect_false (cond)
957#define expect_true(cond) ecb_expect_true (cond)
958#define noinline ecb_noinline
959
960#define inline_size ecb_inline
961
962#if EV_FEATURE_CODE
963# define inline_speed ecb_inline
964#else
965# define inline_speed static noinline
966#endif
967
968#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
969
970#if EV_MINPRI == EV_MAXPRI
971# define ABSPRI(w) (((W)w), 0)
972#else
973# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
974#endif
975
976#define EMPTY /* required for microsofts broken pseudo-c compiler */
977#define EMPTY2(a,b) /* used to suppress some warnings */
978
979typedef ev_watcher *W;
980typedef ev_watcher_list *WL;
981typedef ev_watcher_time *WT;
982
983#define ev_active(w) ((W)(w))->active
984#define ev_at(w) ((WT)(w))->at
985
986#if EV_USE_REALTIME
987/* sig_atomic_t is used to avoid per-thread variables or locking but still */
988/* giving it a reasonably high chance of working on typical architectures */
989static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
990#endif
991
992#if EV_USE_MONOTONIC
993static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
994#endif
995
996#ifndef EV_FD_TO_WIN32_HANDLE
997# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
998#endif
999#ifndef EV_WIN32_HANDLE_TO_FD
1000# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1001#endif
1002#ifndef EV_WIN32_CLOSE_FD
1003# define EV_WIN32_CLOSE_FD(fd) close (fd)
1004#endif
1005
1006#ifdef _WIN32
1007# include "ev_win32.c"
1008#endif
1009
1010/*****************************************************************************/
1011
1012/* define a suitable floor function (only used by periodics atm) */
1013
1014#if EV_USE_FLOOR
1015# include <math.h>
1016# define ev_floor(v) floor (v)
1017#else
1018
1019#include <float.h>
1020
1021/* a floor() replacement function, should be independent of ev_tstamp type */
1022static ev_tstamp noinline
1023ev_floor (ev_tstamp v)
1024{
1025 /* the choice of shift factor is not terribly important */
1026#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1027 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1028#else
1029 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1030#endif
1031
1032 /* argument too large for an unsigned long? */
1033 if (expect_false (v >= shift))
1034 {
1035 ev_tstamp f;
1036
1037 if (v == v - 1.)
1038 return v; /* very large number */
1039
1040 f = shift * ev_floor (v * (1. / shift));
1041 return f + ev_floor (v - f);
1042 }
1043
1044 /* special treatment for negative args? */
1045 if (expect_false (v < 0.))
1046 {
1047 ev_tstamp f = -ev_floor (-v);
1048
1049 return f - (f == v ? 0 : 1);
1050 }
1051
1052 /* fits into an unsigned long */
1053 return (unsigned long)v;
1054}
1055
1056#endif
1057
1058/*****************************************************************************/
1059
1060#ifdef __linux
1061# include <sys/utsname.h>
1062#endif
1063
1064static unsigned int noinline ecb_cold
1065ev_linux_version (void)
1066{
1067#ifdef __linux
1068 unsigned int v = 0;
1069 struct utsname buf;
1070 int i;
1071 char *p = buf.release;
1072
1073 if (uname (&buf))
1074 return 0;
1075
1076 for (i = 3+1; --i; )
1077 {
1078 unsigned int c = 0;
1079
1080 for (;;)
1081 {
1082 if (*p >= '0' && *p <= '9')
1083 c = c * 10 + *p++ - '0';
1084 else
1085 {
1086 p += *p == '.';
1087 break;
1088 }
1089 }
1090
1091 v = (v << 8) | c;
1092 }
1093
1094 return v;
1095#else
1096 return 0;
1097#endif
1098}
1099
1100/*****************************************************************************/
1101
1102#if EV_AVOID_STDIO
1103static void noinline ecb_cold
1104ev_printerr (const char *msg)
1105{
1106 write (STDERR_FILENO, msg, strlen (msg));
1107}
1108#endif
1109
1110static void (*syserr_cb)(const char *msg) EV_THROW;
1111
1112void ecb_cold
1113ev_set_syserr_cb (void (*cb)(const char *msg)) EV_THROW
1114{
1115 syserr_cb = cb;
1116}
1117
1118static void noinline ecb_cold
1119ev_syserr (const char *msg)
1120{
1121 if (!msg)
1122 msg = "(libev) system error";
1123
1124 if (syserr_cb)
1125 syserr_cb (msg);
1126 else
1127 {
1128#if EV_AVOID_STDIO
1129 ev_printerr (msg);
1130 ev_printerr (": ");
1131 ev_printerr (strerror (errno));
1132 ev_printerr ("\n");
1133#else
1134 perror (msg);
1135#endif
1136 abort ();
1137 }
1138}
1139
1140static void *
1141ev_realloc_emul (void *ptr, long size)
1142{
1143#if __GLIBC__
1144 return realloc (ptr, size);
1145#else
1146 /* some systems, notably openbsd and darwin, fail to properly
1147 * implement realloc (x, 0) (as required by both ansi c-89 and
1148 * the single unix specification, so work around them here.
1149 */
1150
1151 if (size)
1152 return realloc (ptr, size);
1153
1154 free (ptr);
1155 return 0;
1156#endif
1157}
1158
1159static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
1160
1161void ecb_cold
1162ev_set_allocator (void *(*cb)(void *ptr, long size)) EV_THROW
1163{
1164 alloc = cb;
1165}
1166
1167inline_speed void *
1168ev_realloc (void *ptr, long size)
1169{
1170 ptr = alloc (ptr, size);
1171
1172 if (!ptr && size)
1173 {
1174#if EV_AVOID_STDIO
1175 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1176#else
1177 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1178#endif
1179 abort ();
1180 }
1181
1182 return ptr;
1183}
1184
1185#define ev_malloc(size) ev_realloc (0, (size))
1186#define ev_free(ptr) ev_realloc ((ptr), 0)
1187
1188/*****************************************************************************/
1189
1190/* set in reify when reification needed */
1191#define EV_ANFD_REIFY 1
1192
1193/* file descriptor info structure */
1194typedef struct
1195{
1196 WL head;
1197 unsigned char events; /* the events watched for */
1198 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1199 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
1200 unsigned char unused;
1201#if EV_USE_EPOLL
1202 unsigned int egen; /* generation counter to counter epoll bugs */
1203#endif
1204#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1205 SOCKET handle;
1206#endif
1207#if EV_USE_IOCP
1208 OVERLAPPED or, ow;
1209#endif
1210} ANFD;
1211
1212/* stores the pending event set for a given watcher */
1213typedef struct
1214{
1215 W w;
1216 int events; /* the pending event set for the given watcher */
1217} ANPENDING;
1218
1219#if EV_USE_INOTIFY
1220/* hash table entry per inotify-id */
1221typedef struct
1222{
1223 WL head;
1224} ANFS;
1225#endif
1226
1227/* Heap Entry */
1228#if EV_HEAP_CACHE_AT
1229 /* a heap element */
1230 typedef struct {
1231 ev_tstamp at;
1232 WT w;
1233 } ANHE;
1234
1235 #define ANHE_w(he) (he).w /* access watcher, read-write */
1236 #define ANHE_at(he) (he).at /* access cached at, read-only */
1237 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1238#else
1239 /* a heap element */
1240 typedef WT ANHE;
1241
1242 #define ANHE_w(he) (he)
1243 #define ANHE_at(he) (he)->at
1244 #define ANHE_at_cache(he)
1245#endif
1246
1247#if EV_MULTIPLICITY
1248
1249 struct ev_loop
1250 {
1251 ev_tstamp ev_rt_now;
1252 #define ev_rt_now ((loop)->ev_rt_now)
1253 #define VAR(name,decl) decl;
1254 #include "ev_vars.h"
1255 #undef VAR
1256 };
1257 #include "ev_wrap.h"
1258
1259 static struct ev_loop default_loop_struct;
1260 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
1261
1262#else
1263
1264 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
1265 #define VAR(name,decl) static decl;
1266 #include "ev_vars.h"
1267 #undef VAR
1268
1269 static int ev_default_loop_ptr;
1270
1271#endif
1272
1273#if EV_FEATURE_API
1274# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1275# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1276# define EV_INVOKE_PENDING invoke_cb (EV_A)
1277#else
1278# define EV_RELEASE_CB (void)0
1279# define EV_ACQUIRE_CB (void)0
1280# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1281#endif
1282
1283#define EVBREAK_RECURSE 0x80
1284
1285/*****************************************************************************/
1286
1287#ifndef EV_HAVE_EV_TIME
93ev_tstamp 1288ev_tstamp
94ev_time (void) 1289ev_time (void) EV_THROW
95{ 1290{
96#if EV_USE_REALTIME 1291#if EV_USE_REALTIME
1292 if (expect_true (have_realtime))
1293 {
97 struct timespec ts; 1294 struct timespec ts;
98 clock_gettime (CLOCK_REALTIME, &ts); 1295 clock_gettime (CLOCK_REALTIME, &ts);
99 return ts.tv_sec + ts.tv_nsec * 1e-9; 1296 return ts.tv_sec + ts.tv_nsec * 1e-9;
100#else 1297 }
1298#endif
1299
101 struct timeval tv; 1300 struct timeval tv;
102 gettimeofday (&tv, 0); 1301 gettimeofday (&tv, 0);
103 return tv.tv_sec + tv.tv_usec * 1e-6; 1302 return tv.tv_sec + tv.tv_usec * 1e-6;
104#endif
105} 1303}
1304#endif
106 1305
107static ev_tstamp 1306inline_size ev_tstamp
108get_clock (void) 1307get_clock (void)
109{ 1308{
110#if EV_USE_MONOTONIC 1309#if EV_USE_MONOTONIC
111 if (have_monotonic) 1310 if (expect_true (have_monotonic))
112 { 1311 {
113 struct timespec ts; 1312 struct timespec ts;
114 clock_gettime (CLOCK_MONOTONIC, &ts); 1313 clock_gettime (CLOCK_MONOTONIC, &ts);
115 return ts.tv_sec + ts.tv_nsec * 1e-9; 1314 return ts.tv_sec + ts.tv_nsec * 1e-9;
116 } 1315 }
117#endif 1316#endif
118 1317
119 return ev_time (); 1318 return ev_time ();
120} 1319}
121 1320
122#define array_roundsize(base,n) ((n) | 4 & ~3) 1321#if EV_MULTIPLICITY
1322ev_tstamp
1323ev_now (EV_P) EV_THROW
1324{
1325 return ev_rt_now;
1326}
1327#endif
123 1328
124#define array_needsize(base,cur,cnt,init) \ 1329void
125 if ((cnt) > cur) \ 1330ev_sleep (ev_tstamp delay) EV_THROW
126 { \ 1331{
127 int newcnt = cur; \ 1332 if (delay > 0.)
128 do \
129 { \
130 newcnt = array_roundsize (base, newcnt << 1); \
131 } \
132 while ((cnt) > newcnt); \
133 \
134 base = realloc (base, sizeof (*base) * (newcnt)); \
135 init (base + cur, newcnt - cur); \
136 cur = newcnt; \
137 } 1333 {
1334#if EV_USE_NANOSLEEP
1335 struct timespec ts;
1336
1337 EV_TS_SET (ts, delay);
1338 nanosleep (&ts, 0);
1339#elif defined _WIN32
1340 Sleep ((unsigned long)(delay * 1e3));
1341#else
1342 struct timeval tv;
1343
1344 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1345 /* something not guaranteed by newer posix versions, but guaranteed */
1346 /* by older ones */
1347 EV_TV_SET (tv, delay);
1348 select (0, 0, 0, 0, &tv);
1349#endif
1350 }
1351}
138 1352
139/*****************************************************************************/ 1353/*****************************************************************************/
140 1354
141typedef struct 1355#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
142{
143 struct ev_io *head;
144 unsigned char events;
145 unsigned char reify;
146} ANFD;
147 1356
148static ANFD *anfds; 1357/* find a suitable new size for the given array, */
149static int anfdmax; 1358/* hopefully by rounding to a nice-to-malloc size */
150 1359inline_size int
151static void 1360array_nextsize (int elem, int cur, int cnt)
152anfds_init (ANFD *base, int count)
153{ 1361{
154 while (count--) 1362 int ncur = cur + 1;
155 {
156 base->head = 0;
157 base->events = EV_NONE;
158 base->reify = 0;
159 1363
160 ++base; 1364 do
1365 ncur <<= 1;
1366 while (cnt > ncur);
1367
1368 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
1369 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
161 } 1370 {
162} 1371 ncur *= elem;
163 1372 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
164typedef struct 1373 ncur = ncur - sizeof (void *) * 4;
165{ 1374 ncur /= elem;
166 W w;
167 int events;
168} ANPENDING;
169
170static ANPENDING *pendings;
171static int pendingmax, pendingcnt;
172
173static void
174event (W w, int events)
175{
176 if (w->pending)
177 { 1375 }
1376
1377 return ncur;
1378}
1379
1380static void * noinline ecb_cold
1381array_realloc (int elem, void *base, int *cur, int cnt)
1382{
1383 *cur = array_nextsize (elem, *cur, cnt);
1384 return ev_realloc (base, elem * *cur);
1385}
1386
1387#define array_init_zero(base,count) \
1388 memset ((void *)(base), 0, sizeof (*(base)) * (count))
1389
1390#define array_needsize(type,base,cur,cnt,init) \
1391 if (expect_false ((cnt) > (cur))) \
1392 { \
1393 int ecb_unused ocur_ = (cur); \
1394 (base) = (type *)array_realloc \
1395 (sizeof (type), (base), &(cur), (cnt)); \
1396 init ((base) + (ocur_), (cur) - ocur_); \
1397 }
1398
1399#if 0
1400#define array_slim(type,stem) \
1401 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
1402 { \
1403 stem ## max = array_roundsize (stem ## cnt >> 1); \
1404 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
1405 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
1406 }
1407#endif
1408
1409#define array_free(stem, idx) \
1410 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
1411
1412/*****************************************************************************/
1413
1414/* dummy callback for pending events */
1415static void noinline
1416pendingcb (EV_P_ ev_prepare *w, int revents)
1417{
1418}
1419
1420void noinline
1421ev_feed_event (EV_P_ void *w, int revents) EV_THROW
1422{
1423 W w_ = (W)w;
1424 int pri = ABSPRI (w_);
1425
1426 if (expect_false (w_->pending))
1427 pendings [pri][w_->pending - 1].events |= revents;
1428 else
1429 {
1430 w_->pending = ++pendingcnt [pri];
1431 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1432 pendings [pri][w_->pending - 1].w = w_;
178 pendings [w->pending - 1].events |= events; 1433 pendings [pri][w_->pending - 1].events = revents;
179 return;
180 } 1434 }
181 1435
182 w->pending = ++pendingcnt; 1436 pendingpri = NUMPRI - 1;
183 array_needsize (pendings, pendingmax, pendingcnt, );
184 pendings [pendingcnt - 1].w = w;
185 pendings [pendingcnt - 1].events = events;
186} 1437}
187 1438
188static void 1439inline_speed void
1440feed_reverse (EV_P_ W w)
1441{
1442 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1443 rfeeds [rfeedcnt++] = w;
1444}
1445
1446inline_size void
1447feed_reverse_done (EV_P_ int revents)
1448{
1449 do
1450 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1451 while (rfeedcnt);
1452}
1453
1454inline_speed void
189queue_events (W *events, int eventcnt, int type) 1455queue_events (EV_P_ W *events, int eventcnt, int type)
190{ 1456{
191 int i; 1457 int i;
192 1458
193 for (i = 0; i < eventcnt; ++i) 1459 for (i = 0; i < eventcnt; ++i)
194 event (events [i], type); 1460 ev_feed_event (EV_A_ events [i], type);
195} 1461}
196 1462
197static void 1463/*****************************************************************************/
1464
1465inline_speed void
198fd_event (int fd, int events) 1466fd_event_nocheck (EV_P_ int fd, int revents)
199{ 1467{
200 ANFD *anfd = anfds + fd; 1468 ANFD *anfd = anfds + fd;
201 struct ev_io *w; 1469 ev_io *w;
202 1470
203 for (w = anfd->head; w; w = w->next) 1471 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
204 { 1472 {
205 int ev = w->events & events; 1473 int ev = w->events & revents;
206 1474
207 if (ev) 1475 if (ev)
208 event ((W)w, ev); 1476 ev_feed_event (EV_A_ (W)w, ev);
209 } 1477 }
210} 1478}
211 1479
212/*****************************************************************************/ 1480/* do not submit kernel events for fds that have reify set */
1481/* because that means they changed while we were polling for new events */
1482inline_speed void
1483fd_event (EV_P_ int fd, int revents)
1484{
1485 ANFD *anfd = anfds + fd;
213 1486
214static int *fdchanges; 1487 if (expect_true (!anfd->reify))
215static int fdchangemax, fdchangecnt; 1488 fd_event_nocheck (EV_A_ fd, revents);
1489}
216 1490
217static void 1491void
218fd_reify (void) 1492ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
1493{
1494 if (fd >= 0 && fd < anfdmax)
1495 fd_event_nocheck (EV_A_ fd, revents);
1496}
1497
1498/* make sure the external fd watch events are in-sync */
1499/* with the kernel/libev internal state */
1500inline_size void
1501fd_reify (EV_P)
219{ 1502{
220 int i; 1503 int i;
221 1504
1505#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
222 for (i = 0; i < fdchangecnt; ++i) 1506 for (i = 0; i < fdchangecnt; ++i)
223 { 1507 {
224 int fd = fdchanges [i]; 1508 int fd = fdchanges [i];
225 ANFD *anfd = anfds + fd; 1509 ANFD *anfd = anfds + fd;
226 struct ev_io *w;
227 1510
228 int events = 0; 1511 if (anfd->reify & EV__IOFDSET && anfd->head)
229
230 for (w = anfd->head; w; w = w->next)
231 events |= w->events;
232
233 anfd->reify = 0;
234
235 if (anfd->events != events)
236 { 1512 {
1513 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1514
1515 if (handle != anfd->handle)
1516 {
1517 unsigned long arg;
1518
1519 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1520
1521 /* handle changed, but fd didn't - we need to do it in two steps */
237 method_modify (fd, anfd->events, events); 1522 backend_modify (EV_A_ fd, anfd->events, 0);
238 anfd->events = events; 1523 anfd->events = 0;
1524 anfd->handle = handle;
1525 }
239 } 1526 }
240 } 1527 }
1528#endif
1529
1530 for (i = 0; i < fdchangecnt; ++i)
1531 {
1532 int fd = fdchanges [i];
1533 ANFD *anfd = anfds + fd;
1534 ev_io *w;
1535
1536 unsigned char o_events = anfd->events;
1537 unsigned char o_reify = anfd->reify;
1538
1539 anfd->reify = 0;
1540
1541 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1542 {
1543 anfd->events = 0;
1544
1545 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1546 anfd->events |= (unsigned char)w->events;
1547
1548 if (o_events != anfd->events)
1549 o_reify = EV__IOFDSET; /* actually |= */
1550 }
1551
1552 if (o_reify & EV__IOFDSET)
1553 backend_modify (EV_A_ fd, o_events, anfd->events);
1554 }
241 1555
242 fdchangecnt = 0; 1556 fdchangecnt = 0;
243} 1557}
244 1558
245static void 1559/* something about the given fd changed */
246fd_change (int fd) 1560inline_size void
1561fd_change (EV_P_ int fd, int flags)
247{ 1562{
248 if (anfds [fd].reify || fdchangecnt < 0) 1563 unsigned char reify = anfds [fd].reify;
249 return;
250
251 anfds [fd].reify = 1; 1564 anfds [fd].reify |= flags;
252 1565
1566 if (expect_true (!reify))
1567 {
253 ++fdchangecnt; 1568 ++fdchangecnt;
254 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1569 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
255 fdchanges [fdchangecnt - 1] = fd; 1570 fdchanges [fdchangecnt - 1] = fd;
1571 }
1572}
1573
1574/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1575inline_speed void ecb_cold
1576fd_kill (EV_P_ int fd)
1577{
1578 ev_io *w;
1579
1580 while ((w = (ev_io *)anfds [fd].head))
1581 {
1582 ev_io_stop (EV_A_ w);
1583 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1584 }
1585}
1586
1587/* check whether the given fd is actually valid, for error recovery */
1588inline_size int ecb_cold
1589fd_valid (int fd)
1590{
1591#ifdef _WIN32
1592 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1593#else
1594 return fcntl (fd, F_GETFD) != -1;
1595#endif
256} 1596}
257 1597
258/* called on EBADF to verify fds */ 1598/* called on EBADF to verify fds */
259static void 1599static void noinline ecb_cold
260fd_recheck (void) 1600fd_ebadf (EV_P)
261{ 1601{
262 int fd; 1602 int fd;
263 1603
264 for (fd = 0; fd < anfdmax; ++fd) 1604 for (fd = 0; fd < anfdmax; ++fd)
265 if (anfds [fd].events) 1605 if (anfds [fd].events)
266 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 1606 if (!fd_valid (fd) && errno == EBADF)
267 while (anfds [fd].head) 1607 fd_kill (EV_A_ fd);
1608}
1609
1610/* called on ENOMEM in select/poll to kill some fds and retry */
1611static void noinline ecb_cold
1612fd_enomem (EV_P)
1613{
1614 int fd;
1615
1616 for (fd = anfdmax; fd--; )
1617 if (anfds [fd].events)
1618 {
1619 fd_kill (EV_A_ fd);
1620 break;
1621 }
1622}
1623
1624/* usually called after fork if backend needs to re-arm all fds from scratch */
1625static void noinline
1626fd_rearm_all (EV_P)
1627{
1628 int fd;
1629
1630 for (fd = 0; fd < anfdmax; ++fd)
1631 if (anfds [fd].events)
1632 {
1633 anfds [fd].events = 0;
1634 anfds [fd].emask = 0;
1635 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1636 }
1637}
1638
1639/* used to prepare libev internal fd's */
1640/* this is not fork-safe */
1641inline_speed void
1642fd_intern (int fd)
1643{
1644#ifdef _WIN32
1645 unsigned long arg = 1;
1646 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1647#else
1648 fcntl (fd, F_SETFD, FD_CLOEXEC);
1649 fcntl (fd, F_SETFL, O_NONBLOCK);
1650#endif
1651}
1652
1653/*****************************************************************************/
1654
1655/*
1656 * the heap functions want a real array index. array index 0 is guaranteed to not
1657 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1658 * the branching factor of the d-tree.
1659 */
1660
1661/*
1662 * at the moment we allow libev the luxury of two heaps,
1663 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1664 * which is more cache-efficient.
1665 * the difference is about 5% with 50000+ watchers.
1666 */
1667#if EV_USE_4HEAP
1668
1669#define DHEAP 4
1670#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1671#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1672#define UPHEAP_DONE(p,k) ((p) == (k))
1673
1674/* away from the root */
1675inline_speed void
1676downheap (ANHE *heap, int N, int k)
1677{
1678 ANHE he = heap [k];
1679 ANHE *E = heap + N + HEAP0;
1680
1681 for (;;)
1682 {
1683 ev_tstamp minat;
1684 ANHE *minpos;
1685 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1686
1687 /* find minimum child */
1688 if (expect_true (pos + DHEAP - 1 < E))
1689 {
1690 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1691 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1692 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1693 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1694 }
1695 else if (pos < E)
1696 {
1697 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1698 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1699 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1700 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1701 }
1702 else
1703 break;
1704
1705 if (ANHE_at (he) <= minat)
1706 break;
1707
1708 heap [k] = *minpos;
1709 ev_active (ANHE_w (*minpos)) = k;
1710
1711 k = minpos - heap;
1712 }
1713
1714 heap [k] = he;
1715 ev_active (ANHE_w (he)) = k;
1716}
1717
1718#else /* 4HEAP */
1719
1720#define HEAP0 1
1721#define HPARENT(k) ((k) >> 1)
1722#define UPHEAP_DONE(p,k) (!(p))
1723
1724/* away from the root */
1725inline_speed void
1726downheap (ANHE *heap, int N, int k)
1727{
1728 ANHE he = heap [k];
1729
1730 for (;;)
1731 {
1732 int c = k << 1;
1733
1734 if (c >= N + HEAP0)
1735 break;
1736
1737 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1738 ? 1 : 0;
1739
1740 if (ANHE_at (he) <= ANHE_at (heap [c]))
1741 break;
1742
1743 heap [k] = heap [c];
1744 ev_active (ANHE_w (heap [k])) = k;
1745
1746 k = c;
1747 }
1748
1749 heap [k] = he;
1750 ev_active (ANHE_w (he)) = k;
1751}
1752#endif
1753
1754/* towards the root */
1755inline_speed void
1756upheap (ANHE *heap, int k)
1757{
1758 ANHE he = heap [k];
1759
1760 for (;;)
1761 {
1762 int p = HPARENT (k);
1763
1764 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1765 break;
1766
1767 heap [k] = heap [p];
1768 ev_active (ANHE_w (heap [k])) = k;
1769 k = p;
1770 }
1771
1772 heap [k] = he;
1773 ev_active (ANHE_w (he)) = k;
1774}
1775
1776/* move an element suitably so it is in a correct place */
1777inline_size void
1778adjustheap (ANHE *heap, int N, int k)
1779{
1780 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1781 upheap (heap, k);
1782 else
1783 downheap (heap, N, k);
1784}
1785
1786/* rebuild the heap: this function is used only once and executed rarely */
1787inline_size void
1788reheap (ANHE *heap, int N)
1789{
1790 int i;
1791
1792 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1793 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1794 for (i = 0; i < N; ++i)
1795 upheap (heap, i + HEAP0);
1796}
1797
1798/*****************************************************************************/
1799
1800/* associate signal watchers to a signal signal */
1801typedef struct
1802{
1803 EV_ATOMIC_T pending;
1804#if EV_MULTIPLICITY
1805 EV_P;
1806#endif
1807 WL head;
1808} ANSIG;
1809
1810static ANSIG signals [EV_NSIG - 1];
1811
1812/*****************************************************************************/
1813
1814#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1815
1816static void noinline ecb_cold
1817evpipe_init (EV_P)
1818{
1819 if (!ev_is_active (&pipe_w))
1820 {
1821# if EV_USE_EVENTFD
1822 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1823 if (evfd < 0 && errno == EINVAL)
1824 evfd = eventfd (0, 0);
1825
1826 if (evfd >= 0)
1827 {
1828 evpipe [0] = -1;
1829 fd_intern (evfd); /* doing it twice doesn't hurt */
1830 ev_io_set (&pipe_w, evfd, EV_READ);
1831 }
1832 else
1833# endif
1834 {
1835 while (pipe (evpipe))
1836 ev_syserr ("(libev) error creating signal/async pipe");
1837
1838 fd_intern (evpipe [0]);
1839 fd_intern (evpipe [1]);
1840 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1841 }
1842
1843 ev_io_start (EV_A_ &pipe_w);
1844 ev_unref (EV_A); /* watcher should not keep loop alive */
1845 }
1846}
1847
1848inline_speed void
1849evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1850{
1851 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1852
1853 if (expect_true (*flag))
1854 return;
1855
1856 *flag = 1;
1857
1858 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1859
1860 pipe_write_skipped = 1;
1861
1862 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1863
1864 if (pipe_write_wanted)
1865 {
1866 int old_errno;
1867
1868 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1869
1870 old_errno = errno; /* save errno because write will clobber it */
1871
1872#if EV_USE_EVENTFD
1873 if (evfd >= 0)
1874 {
1875 uint64_t counter = 1;
1876 write (evfd, &counter, sizeof (uint64_t));
1877 }
1878 else
1879#endif
1880 {
1881 /* win32 people keep sending patches that change this write() to send() */
1882 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1883 /* so when you think this write should be a send instead, please find out */
1884 /* where your send() is from - it's definitely not the microsoft send, and */
1885 /* tell me. thank you. */
1886 /* it might be that your problem is that your environment needs EV_USE_WSASOCKET */
1887 /* check the ev documentation on how to use this flag */
1888 write (evpipe [1], &(evpipe [1]), 1);
1889 }
1890
1891 errno = old_errno;
1892 }
1893}
1894
1895/* called whenever the libev signal pipe */
1896/* got some events (signal, async) */
1897static void
1898pipecb (EV_P_ ev_io *iow, int revents)
1899{
1900 int i;
1901
1902 if (revents & EV_READ)
1903 {
1904#if EV_USE_EVENTFD
1905 if (evfd >= 0)
1906 {
1907 uint64_t counter;
1908 read (evfd, &counter, sizeof (uint64_t));
1909 }
1910 else
1911#endif
1912 {
1913 char dummy;
1914 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1915 read (evpipe [0], &dummy, 1);
1916 }
1917 }
1918
1919 pipe_write_skipped = 0;
1920
1921 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1922
1923#if EV_SIGNAL_ENABLE
1924 if (sig_pending)
1925 {
1926 sig_pending = 0;
1927
1928 ECB_MEMORY_FENCE_RELEASE;
1929
1930 for (i = EV_NSIG - 1; i--; )
1931 if (expect_false (signals [i].pending))
1932 ev_feed_signal_event (EV_A_ i + 1);
1933 }
1934#endif
1935
1936#if EV_ASYNC_ENABLE
1937 if (async_pending)
1938 {
1939 async_pending = 0;
1940
1941 ECB_MEMORY_FENCE_RELEASE;
1942
1943 for (i = asynccnt; i--; )
1944 if (asyncs [i]->sent)
268 { 1945 {
269 ev_io_stop (anfds [fd].head); 1946 asyncs [i]->sent = 0;
270 event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE); 1947 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
271 } 1948 }
1949 }
1950#endif
272} 1951}
273 1952
274/*****************************************************************************/ 1953/*****************************************************************************/
275 1954
276static struct ev_timer **timers; 1955void
277static int timermax, timercnt; 1956ev_feed_signal (int signum) EV_THROW
1957{
1958#if EV_MULTIPLICITY
1959 EV_P = signals [signum - 1].loop;
278 1960
279static struct ev_periodic **periodics; 1961 if (!EV_A)
280static int periodicmax, periodiccnt; 1962 return;
1963#endif
1964
1965 if (!ev_active (&pipe_w))
1966 return;
1967
1968 signals [signum - 1].pending = 1;
1969 evpipe_write (EV_A_ &sig_pending);
1970}
281 1971
282static void 1972static void
283upheap (WT *timers, int k) 1973ev_sighandler (int signum)
284{ 1974{
285 WT w = timers [k]; 1975#ifdef _WIN32
1976 signal (signum, ev_sighandler);
1977#endif
286 1978
287 while (k && timers [k >> 1]->at > w->at) 1979 ev_feed_signal (signum);
288 {
289 timers [k] = timers [k >> 1];
290 timers [k]->active = k + 1;
291 k >>= 1;
292 }
293
294 timers [k] = w;
295 timers [k]->active = k + 1;
296
297} 1980}
298 1981
1982void noinline
1983ev_feed_signal_event (EV_P_ int signum) EV_THROW
1984{
1985 WL w;
1986
1987 if (expect_false (signum <= 0 || signum > EV_NSIG))
1988 return;
1989
1990 --signum;
1991
1992#if EV_MULTIPLICITY
1993 /* it is permissible to try to feed a signal to the wrong loop */
1994 /* or, likely more useful, feeding a signal nobody is waiting for */
1995
1996 if (expect_false (signals [signum].loop != EV_A))
1997 return;
1998#endif
1999
2000 signals [signum].pending = 0;
2001
2002 for (w = signals [signum].head; w; w = w->next)
2003 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2004}
2005
2006#if EV_USE_SIGNALFD
299static void 2007static void
300downheap (WT *timers, int N, int k) 2008sigfdcb (EV_P_ ev_io *iow, int revents)
301{ 2009{
302 WT w = timers [k]; 2010 struct signalfd_siginfo si[2], *sip; /* these structs are big */
303 2011
304 while (k < (N >> 1)) 2012 for (;;)
305 { 2013 {
306 int j = k << 1; 2014 ssize_t res = read (sigfd, si, sizeof (si));
307 2015
308 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 2016 /* not ISO-C, as res might be -1, but works with SuS */
309 ++j; 2017 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2018 ev_feed_signal_event (EV_A_ sip->ssi_signo);
310 2019
311 if (w->at <= timers [j]->at) 2020 if (res < (ssize_t)sizeof (si))
312 break; 2021 break;
313
314 timers [k] = timers [j];
315 timers [k]->active = k + 1;
316 k = j;
317 } 2022 }
318
319 timers [k] = w;
320 timers [k]->active = k + 1;
321} 2023}
2024#endif
2025
2026#endif
322 2027
323/*****************************************************************************/ 2028/*****************************************************************************/
324 2029
325typedef struct 2030#if EV_CHILD_ENABLE
326{ 2031static WL childs [EV_PID_HASHSIZE];
327 struct ev_signal *head;
328 sig_atomic_t volatile gotsig;
329} ANSIG;
330 2032
331static ANSIG *signals;
332static int signalmax;
333
334static int sigpipe [2];
335static sig_atomic_t volatile gotsig;
336static struct ev_io sigev;
337
338static void
339signals_init (ANSIG *base, int count)
340{
341 while (count--)
342 {
343 base->head = 0;
344 base->gotsig = 0;
345
346 ++base;
347 }
348}
349
350static void
351sighandler (int signum)
352{
353 signals [signum - 1].gotsig = 1;
354
355 if (!gotsig)
356 {
357 gotsig = 1;
358 write (sigpipe [1], &signum, 1);
359 }
360}
361
362static void
363sigcb (struct ev_io *iow, int revents)
364{
365 struct ev_signal *w;
366 int sig;
367
368 read (sigpipe [0], &revents, 1);
369 gotsig = 0;
370
371 for (sig = signalmax; sig--; )
372 if (signals [sig].gotsig)
373 {
374 signals [sig].gotsig = 0;
375
376 for (w = signals [sig].head; w; w = w->next)
377 event ((W)w, EV_SIGNAL);
378 }
379}
380
381static void
382siginit (void)
383{
384 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
385 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
386
387 /* rather than sort out wether we really need nb, set it */
388 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
389 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
390
391 ev_io_set (&sigev, sigpipe [0], EV_READ);
392 ev_io_start (&sigev);
393}
394
395/*****************************************************************************/
396
397static struct ev_idle **idles;
398static int idlemax, idlecnt;
399
400static struct ev_prepare **prepares;
401static int preparemax, preparecnt;
402
403static struct ev_check **checks;
404static int checkmax, checkcnt;
405
406/*****************************************************************************/
407
408static struct ev_child *childs [PID_HASHSIZE];
409static struct ev_signal childev; 2033static ev_signal childev;
2034
2035#ifndef WIFCONTINUED
2036# define WIFCONTINUED(status) 0
2037#endif
2038
2039/* handle a single child status event */
2040inline_speed void
2041child_reap (EV_P_ int chain, int pid, int status)
2042{
2043 ev_child *w;
2044 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
2045
2046 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2047 {
2048 if ((w->pid == pid || !w->pid)
2049 && (!traced || (w->flags & 1)))
2050 {
2051 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
2052 w->rpid = pid;
2053 w->rstatus = status;
2054 ev_feed_event (EV_A_ (W)w, EV_CHILD);
2055 }
2056 }
2057}
410 2058
411#ifndef WCONTINUED 2059#ifndef WCONTINUED
412# define WCONTINUED 0 2060# define WCONTINUED 0
413#endif 2061#endif
414 2062
2063/* called on sigchld etc., calls waitpid */
415static void 2064static void
416childcb (struct ev_signal *sw, int revents) 2065childcb (EV_P_ ev_signal *sw, int revents)
417{ 2066{
418 struct ev_child *w;
419 int pid, status; 2067 int pid, status;
420 2068
2069 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
421 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 2070 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
422 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 2071 if (!WCONTINUED
423 if (w->pid == pid || w->pid == -1) 2072 || errno != EINVAL
424 { 2073 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
425 w->status = status; 2074 return;
426 event ((W)w, EV_CHILD); 2075
427 } 2076 /* make sure we are called again until all children have been reaped */
2077 /* we need to do it this way so that the callback gets called before we continue */
2078 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
2079
2080 child_reap (EV_A_ pid, pid, status);
2081 if ((EV_PID_HASHSIZE) > 1)
2082 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
428} 2083}
2084
2085#endif
429 2086
430/*****************************************************************************/ 2087/*****************************************************************************/
431 2088
2089#if EV_USE_IOCP
2090# include "ev_iocp.c"
2091#endif
2092#if EV_USE_PORT
2093# include "ev_port.c"
2094#endif
2095#if EV_USE_KQUEUE
2096# include "ev_kqueue.c"
2097#endif
432#if EV_USE_EPOLL 2098#if EV_USE_EPOLL
433# include "ev_epoll.c" 2099# include "ev_epoll.c"
434#endif 2100#endif
2101#if EV_USE_POLL
2102# include "ev_poll.c"
2103#endif
435#if EV_USE_SELECT 2104#if EV_USE_SELECT
436# include "ev_select.c" 2105# include "ev_select.c"
437#endif 2106#endif
438 2107
2108int ecb_cold
2109ev_version_major (void) EV_THROW
2110{
2111 return EV_VERSION_MAJOR;
2112}
2113
2114int ecb_cold
2115ev_version_minor (void) EV_THROW
2116{
2117 return EV_VERSION_MINOR;
2118}
2119
2120/* return true if we are running with elevated privileges and should ignore env variables */
2121int inline_size ecb_cold
2122enable_secure (void)
2123{
2124#ifdef _WIN32
2125 return 0;
2126#else
2127 return getuid () != geteuid ()
2128 || getgid () != getegid ();
2129#endif
2130}
2131
2132unsigned int ecb_cold
2133ev_supported_backends (void) EV_THROW
2134{
2135 unsigned int flags = 0;
2136
2137 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2138 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
2139 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2140 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2141 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2142
2143 return flags;
2144}
2145
2146unsigned int ecb_cold
2147ev_recommended_backends (void) EV_THROW
2148{
2149 unsigned int flags = ev_supported_backends ();
2150
2151#ifndef __NetBSD__
2152 /* kqueue is borked on everything but netbsd apparently */
2153 /* it usually doesn't work correctly on anything but sockets and pipes */
2154 flags &= ~EVBACKEND_KQUEUE;
2155#endif
2156#ifdef __APPLE__
2157 /* only select works correctly on that "unix-certified" platform */
2158 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2159 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2160#endif
2161#ifdef __FreeBSD__
2162 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2163#endif
2164
2165 return flags;
2166}
2167
2168unsigned int ecb_cold
2169ev_embeddable_backends (void) EV_THROW
2170{
2171 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2172
2173 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2174 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2175 flags &= ~EVBACKEND_EPOLL;
2176
2177 return flags;
2178}
2179
2180unsigned int
2181ev_backend (EV_P) EV_THROW
2182{
2183 return backend;
2184}
2185
2186#if EV_FEATURE_API
2187unsigned int
2188ev_iteration (EV_P) EV_THROW
2189{
2190 return loop_count;
2191}
2192
2193unsigned int
2194ev_depth (EV_P) EV_THROW
2195{
2196 return loop_depth;
2197}
2198
2199void
2200ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2201{
2202 io_blocktime = interval;
2203}
2204
2205void
2206ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2207{
2208 timeout_blocktime = interval;
2209}
2210
2211void
2212ev_set_userdata (EV_P_ void *data) EV_THROW
2213{
2214 userdata = data;
2215}
2216
2217void *
2218ev_userdata (EV_P) EV_THROW
2219{
2220 return userdata;
2221}
2222
2223void
2224ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
2225{
2226 invoke_cb = invoke_pending_cb;
2227}
2228
2229void
2230ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2231{
2232 release_cb = release;
2233 acquire_cb = acquire;
2234}
2235#endif
2236
2237/* initialise a loop structure, must be zero-initialised */
2238static void noinline ecb_cold
2239loop_init (EV_P_ unsigned int flags) EV_THROW
2240{
2241 if (!backend)
2242 {
2243 origflags = flags;
2244
2245#if EV_USE_REALTIME
2246 if (!have_realtime)
2247 {
2248 struct timespec ts;
2249
2250 if (!clock_gettime (CLOCK_REALTIME, &ts))
2251 have_realtime = 1;
2252 }
2253#endif
2254
2255#if EV_USE_MONOTONIC
2256 if (!have_monotonic)
2257 {
2258 struct timespec ts;
2259
2260 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
2261 have_monotonic = 1;
2262 }
2263#endif
2264
2265 /* pid check not overridable via env */
2266#ifndef _WIN32
2267 if (flags & EVFLAG_FORKCHECK)
2268 curpid = getpid ();
2269#endif
2270
2271 if (!(flags & EVFLAG_NOENV)
2272 && !enable_secure ()
2273 && getenv ("LIBEV_FLAGS"))
2274 flags = atoi (getenv ("LIBEV_FLAGS"));
2275
2276 ev_rt_now = ev_time ();
2277 mn_now = get_clock ();
2278 now_floor = mn_now;
2279 rtmn_diff = ev_rt_now - mn_now;
2280#if EV_FEATURE_API
2281 invoke_cb = ev_invoke_pending;
2282#endif
2283
2284 io_blocktime = 0.;
2285 timeout_blocktime = 0.;
2286 backend = 0;
2287 backend_fd = -1;
2288 sig_pending = 0;
2289#if EV_ASYNC_ENABLE
2290 async_pending = 0;
2291#endif
2292 pipe_write_skipped = 0;
2293 pipe_write_wanted = 0;
2294#if EV_USE_INOTIFY
2295 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2296#endif
2297#if EV_USE_SIGNALFD
2298 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2299#endif
2300
2301 if (!(flags & EVBACKEND_MASK))
2302 flags |= ev_recommended_backends ();
2303
2304#if EV_USE_IOCP
2305 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2306#endif
2307#if EV_USE_PORT
2308 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
2309#endif
2310#if EV_USE_KQUEUE
2311 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
2312#endif
2313#if EV_USE_EPOLL
2314 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
2315#endif
2316#if EV_USE_POLL
2317 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
2318#endif
2319#if EV_USE_SELECT
2320 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
2321#endif
2322
2323 ev_prepare_init (&pending_w, pendingcb);
2324
2325#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2326 ev_init (&pipe_w, pipecb);
2327 ev_set_priority (&pipe_w, EV_MAXPRI);
2328#endif
2329 }
2330}
2331
2332/* free up a loop structure */
2333void ecb_cold
2334ev_loop_destroy (EV_P)
2335{
2336 int i;
2337
2338#if EV_MULTIPLICITY
2339 /* mimic free (0) */
2340 if (!EV_A)
2341 return;
2342#endif
2343
2344#if EV_CLEANUP_ENABLE
2345 /* queue cleanup watchers (and execute them) */
2346 if (expect_false (cleanupcnt))
2347 {
2348 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2349 EV_INVOKE_PENDING;
2350 }
2351#endif
2352
2353#if EV_CHILD_ENABLE
2354 if (ev_is_active (&childev))
2355 {
2356 ev_ref (EV_A); /* child watcher */
2357 ev_signal_stop (EV_A_ &childev);
2358 }
2359#endif
2360
2361 if (ev_is_active (&pipe_w))
2362 {
2363 /*ev_ref (EV_A);*/
2364 /*ev_io_stop (EV_A_ &pipe_w);*/
2365
2366#if EV_USE_EVENTFD
2367 if (evfd >= 0)
2368 close (evfd);
2369#endif
2370
2371 if (evpipe [0] >= 0)
2372 {
2373 EV_WIN32_CLOSE_FD (evpipe [0]);
2374 EV_WIN32_CLOSE_FD (evpipe [1]);
2375 }
2376 }
2377
2378#if EV_USE_SIGNALFD
2379 if (ev_is_active (&sigfd_w))
2380 close (sigfd);
2381#endif
2382
2383#if EV_USE_INOTIFY
2384 if (fs_fd >= 0)
2385 close (fs_fd);
2386#endif
2387
2388 if (backend_fd >= 0)
2389 close (backend_fd);
2390
2391#if EV_USE_IOCP
2392 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2393#endif
2394#if EV_USE_PORT
2395 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
2396#endif
2397#if EV_USE_KQUEUE
2398 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
2399#endif
2400#if EV_USE_EPOLL
2401 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
2402#endif
2403#if EV_USE_POLL
2404 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
2405#endif
2406#if EV_USE_SELECT
2407 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
2408#endif
2409
2410 for (i = NUMPRI; i--; )
2411 {
2412 array_free (pending, [i]);
2413#if EV_IDLE_ENABLE
2414 array_free (idle, [i]);
2415#endif
2416 }
2417
2418 ev_free (anfds); anfds = 0; anfdmax = 0;
2419
2420 /* have to use the microsoft-never-gets-it-right macro */
2421 array_free (rfeed, EMPTY);
2422 array_free (fdchange, EMPTY);
2423 array_free (timer, EMPTY);
2424#if EV_PERIODIC_ENABLE
2425 array_free (periodic, EMPTY);
2426#endif
2427#if EV_FORK_ENABLE
2428 array_free (fork, EMPTY);
2429#endif
2430#if EV_CLEANUP_ENABLE
2431 array_free (cleanup, EMPTY);
2432#endif
2433 array_free (prepare, EMPTY);
2434 array_free (check, EMPTY);
2435#if EV_ASYNC_ENABLE
2436 array_free (async, EMPTY);
2437#endif
2438
2439 backend = 0;
2440
2441#if EV_MULTIPLICITY
2442 if (ev_is_default_loop (EV_A))
2443#endif
2444 ev_default_loop_ptr = 0;
2445#if EV_MULTIPLICITY
2446 else
2447 ev_free (EV_A);
2448#endif
2449}
2450
2451#if EV_USE_INOTIFY
2452inline_size void infy_fork (EV_P);
2453#endif
2454
2455inline_size void
2456loop_fork (EV_P)
2457{
2458#if EV_USE_PORT
2459 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2460#endif
2461#if EV_USE_KQUEUE
2462 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
2463#endif
2464#if EV_USE_EPOLL
2465 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
2466#endif
2467#if EV_USE_INOTIFY
2468 infy_fork (EV_A);
2469#endif
2470
2471 if (ev_is_active (&pipe_w))
2472 {
2473 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2474
2475 ev_ref (EV_A);
2476 ev_io_stop (EV_A_ &pipe_w);
2477
2478#if EV_USE_EVENTFD
2479 if (evfd >= 0)
2480 close (evfd);
2481#endif
2482
2483 if (evpipe [0] >= 0)
2484 {
2485 EV_WIN32_CLOSE_FD (evpipe [0]);
2486 EV_WIN32_CLOSE_FD (evpipe [1]);
2487 }
2488
2489#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2490 evpipe_init (EV_A);
2491 /* now iterate over everything, in case we missed something */
2492 pipecb (EV_A_ &pipe_w, EV_READ);
2493#endif
2494 }
2495
2496 postfork = 0;
2497}
2498
2499#if EV_MULTIPLICITY
2500
2501struct ev_loop * ecb_cold
2502ev_loop_new (unsigned int flags) EV_THROW
2503{
2504 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2505
2506 memset (EV_A, 0, sizeof (struct ev_loop));
2507 loop_init (EV_A_ flags);
2508
2509 if (ev_backend (EV_A))
2510 return EV_A;
2511
2512 ev_free (EV_A);
2513 return 0;
2514}
2515
2516#endif /* multiplicity */
2517
2518#if EV_VERIFY
2519static void noinline ecb_cold
2520verify_watcher (EV_P_ W w)
2521{
2522 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2523
2524 if (w->pending)
2525 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2526}
2527
2528static void noinline ecb_cold
2529verify_heap (EV_P_ ANHE *heap, int N)
2530{
2531 int i;
2532
2533 for (i = HEAP0; i < N + HEAP0; ++i)
2534 {
2535 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2536 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2537 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2538
2539 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2540 }
2541}
2542
2543static void noinline ecb_cold
2544array_verify (EV_P_ W *ws, int cnt)
2545{
2546 while (cnt--)
2547 {
2548 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2549 verify_watcher (EV_A_ ws [cnt]);
2550 }
2551}
2552#endif
2553
2554#if EV_FEATURE_API
2555void ecb_cold
2556ev_verify (EV_P) EV_THROW
2557{
2558#if EV_VERIFY
2559 int i, j;
2560 WL w, w2;
2561
2562 assert (activecnt >= -1);
2563
2564 assert (fdchangemax >= fdchangecnt);
2565 for (i = 0; i < fdchangecnt; ++i)
2566 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2567
2568 assert (anfdmax >= 0);
2569 for (i = j = 0; i < anfdmax; ++i)
2570 for (w = w2 = anfds [i].head; w; w = w->next)
2571 {
2572 verify_watcher (EV_A_ (W)w);
2573
2574 if (++j & 1)
2575 w2 = w2->next;
2576
2577 assert (("libev: io watcher list contains a loop", w != w2));
2578 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2579 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2580 }
2581
2582 assert (timermax >= timercnt);
2583 verify_heap (EV_A_ timers, timercnt);
2584
2585#if EV_PERIODIC_ENABLE
2586 assert (periodicmax >= periodiccnt);
2587 verify_heap (EV_A_ periodics, periodiccnt);
2588#endif
2589
2590 for (i = NUMPRI; i--; )
2591 {
2592 assert (pendingmax [i] >= pendingcnt [i]);
2593#if EV_IDLE_ENABLE
2594 assert (idleall >= 0);
2595 assert (idlemax [i] >= idlecnt [i]);
2596 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2597#endif
2598 }
2599
2600#if EV_FORK_ENABLE
2601 assert (forkmax >= forkcnt);
2602 array_verify (EV_A_ (W *)forks, forkcnt);
2603#endif
2604
2605#if EV_CLEANUP_ENABLE
2606 assert (cleanupmax >= cleanupcnt);
2607 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2608#endif
2609
2610#if EV_ASYNC_ENABLE
2611 assert (asyncmax >= asynccnt);
2612 array_verify (EV_A_ (W *)asyncs, asynccnt);
2613#endif
2614
2615#if EV_PREPARE_ENABLE
2616 assert (preparemax >= preparecnt);
2617 array_verify (EV_A_ (W *)prepares, preparecnt);
2618#endif
2619
2620#if EV_CHECK_ENABLE
2621 assert (checkmax >= checkcnt);
2622 array_verify (EV_A_ (W *)checks, checkcnt);
2623#endif
2624
2625# if 0
2626#if EV_CHILD_ENABLE
2627 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2628 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2629#endif
2630# endif
2631#endif
2632}
2633#endif
2634
2635#if EV_MULTIPLICITY
2636struct ev_loop * ecb_cold
2637#else
439int 2638int
440ev_version_major (void) 2639#endif
2640ev_default_loop (unsigned int flags) EV_THROW
441{ 2641{
442 return EV_VERSION_MAJOR; 2642 if (!ev_default_loop_ptr)
2643 {
2644#if EV_MULTIPLICITY
2645 EV_P = ev_default_loop_ptr = &default_loop_struct;
2646#else
2647 ev_default_loop_ptr = 1;
2648#endif
2649
2650 loop_init (EV_A_ flags);
2651
2652 if (ev_backend (EV_A))
2653 {
2654#if EV_CHILD_ENABLE
2655 ev_signal_init (&childev, childcb, SIGCHLD);
2656 ev_set_priority (&childev, EV_MAXPRI);
2657 ev_signal_start (EV_A_ &childev);
2658 ev_unref (EV_A); /* child watcher should not keep loop alive */
2659#endif
2660 }
2661 else
2662 ev_default_loop_ptr = 0;
2663 }
2664
2665 return ev_default_loop_ptr;
2666}
2667
2668void
2669ev_loop_fork (EV_P) EV_THROW
2670{
2671 postfork = 1; /* must be in line with ev_default_fork */
2672}
2673
2674/*****************************************************************************/
2675
2676void
2677ev_invoke (EV_P_ void *w, int revents)
2678{
2679 EV_CB_INVOKE ((W)w, revents);
2680}
2681
2682unsigned int
2683ev_pending_count (EV_P) EV_THROW
2684{
2685 int pri;
2686 unsigned int count = 0;
2687
2688 for (pri = NUMPRI; pri--; )
2689 count += pendingcnt [pri];
2690
2691 return count;
2692}
2693
2694void noinline
2695ev_invoke_pending (EV_P)
2696{
2697 for (pendingpri = NUMPRI; pendingpri--; ) /* pendingpri is modified during the loop */
2698 while (pendingcnt [pendingpri])
2699 {
2700 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2701
2702 p->w->pending = 0;
2703 EV_CB_INVOKE (p->w, p->events);
2704 EV_FREQUENT_CHECK;
2705 }
2706}
2707
2708#if EV_IDLE_ENABLE
2709/* make idle watchers pending. this handles the "call-idle */
2710/* only when higher priorities are idle" logic */
2711inline_size void
2712idle_reify (EV_P)
2713{
2714 if (expect_false (idleall))
2715 {
2716 int pri;
2717
2718 for (pri = NUMPRI; pri--; )
2719 {
2720 if (pendingcnt [pri])
2721 break;
2722
2723 if (idlecnt [pri])
2724 {
2725 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2726 break;
2727 }
2728 }
2729 }
2730}
2731#endif
2732
2733/* make timers pending */
2734inline_size void
2735timers_reify (EV_P)
2736{
2737 EV_FREQUENT_CHECK;
2738
2739 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2740 {
2741 do
2742 {
2743 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2744
2745 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2746
2747 /* first reschedule or stop timer */
2748 if (w->repeat)
2749 {
2750 ev_at (w) += w->repeat;
2751 if (ev_at (w) < mn_now)
2752 ev_at (w) = mn_now;
2753
2754 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2755
2756 ANHE_at_cache (timers [HEAP0]);
2757 downheap (timers, timercnt, HEAP0);
2758 }
2759 else
2760 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2761
2762 EV_FREQUENT_CHECK;
2763 feed_reverse (EV_A_ (W)w);
2764 }
2765 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2766
2767 feed_reverse_done (EV_A_ EV_TIMER);
2768 }
2769}
2770
2771#if EV_PERIODIC_ENABLE
2772
2773static void noinline
2774periodic_recalc (EV_P_ ev_periodic *w)
2775{
2776 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2777 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2778
2779 /* the above almost always errs on the low side */
2780 while (at <= ev_rt_now)
2781 {
2782 ev_tstamp nat = at + w->interval;
2783
2784 /* when resolution fails us, we use ev_rt_now */
2785 if (expect_false (nat == at))
2786 {
2787 at = ev_rt_now;
2788 break;
2789 }
2790
2791 at = nat;
2792 }
2793
2794 ev_at (w) = at;
2795}
2796
2797/* make periodics pending */
2798inline_size void
2799periodics_reify (EV_P)
2800{
2801 EV_FREQUENT_CHECK;
2802
2803 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2804 {
2805 int feed_count = 0;
2806
2807 do
2808 {
2809 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2810
2811 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2812
2813 /* first reschedule or stop timer */
2814 if (w->reschedule_cb)
2815 {
2816 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2817
2818 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2819
2820 ANHE_at_cache (periodics [HEAP0]);
2821 downheap (periodics, periodiccnt, HEAP0);
2822 }
2823 else if (w->interval)
2824 {
2825 periodic_recalc (EV_A_ w);
2826 ANHE_at_cache (periodics [HEAP0]);
2827 downheap (periodics, periodiccnt, HEAP0);
2828 }
2829 else
2830 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2831
2832 EV_FREQUENT_CHECK;
2833 feed_reverse (EV_A_ (W)w);
2834 }
2835 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2836
2837 feed_reverse_done (EV_A_ EV_PERIODIC);
2838 }
2839}
2840
2841/* simply recalculate all periodics */
2842/* TODO: maybe ensure that at least one event happens when jumping forward? */
2843static void noinline ecb_cold
2844periodics_reschedule (EV_P)
2845{
2846 int i;
2847
2848 /* adjust periodics after time jump */
2849 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2850 {
2851 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2852
2853 if (w->reschedule_cb)
2854 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2855 else if (w->interval)
2856 periodic_recalc (EV_A_ w);
2857
2858 ANHE_at_cache (periodics [i]);
2859 }
2860
2861 reheap (periodics, periodiccnt);
2862}
2863#endif
2864
2865/* adjust all timers by a given offset */
2866static void noinline ecb_cold
2867timers_reschedule (EV_P_ ev_tstamp adjust)
2868{
2869 int i;
2870
2871 for (i = 0; i < timercnt; ++i)
2872 {
2873 ANHE *he = timers + i + HEAP0;
2874 ANHE_w (*he)->at += adjust;
2875 ANHE_at_cache (*he);
2876 }
2877}
2878
2879/* fetch new monotonic and realtime times from the kernel */
2880/* also detect if there was a timejump, and act accordingly */
2881inline_speed void
2882time_update (EV_P_ ev_tstamp max_block)
2883{
2884#if EV_USE_MONOTONIC
2885 if (expect_true (have_monotonic))
2886 {
2887 int i;
2888 ev_tstamp odiff = rtmn_diff;
2889
2890 mn_now = get_clock ();
2891
2892 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2893 /* interpolate in the meantime */
2894 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2895 {
2896 ev_rt_now = rtmn_diff + mn_now;
2897 return;
2898 }
2899
2900 now_floor = mn_now;
2901 ev_rt_now = ev_time ();
2902
2903 /* loop a few times, before making important decisions.
2904 * on the choice of "4": one iteration isn't enough,
2905 * in case we get preempted during the calls to
2906 * ev_time and get_clock. a second call is almost guaranteed
2907 * to succeed in that case, though. and looping a few more times
2908 * doesn't hurt either as we only do this on time-jumps or
2909 * in the unlikely event of having been preempted here.
2910 */
2911 for (i = 4; --i; )
2912 {
2913 ev_tstamp diff;
2914 rtmn_diff = ev_rt_now - mn_now;
2915
2916 diff = odiff - rtmn_diff;
2917
2918 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2919 return; /* all is well */
2920
2921 ev_rt_now = ev_time ();
2922 mn_now = get_clock ();
2923 now_floor = mn_now;
2924 }
2925
2926 /* no timer adjustment, as the monotonic clock doesn't jump */
2927 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2928# if EV_PERIODIC_ENABLE
2929 periodics_reschedule (EV_A);
2930# endif
2931 }
2932 else
2933#endif
2934 {
2935 ev_rt_now = ev_time ();
2936
2937 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2938 {
2939 /* adjust timers. this is easy, as the offset is the same for all of them */
2940 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2941#if EV_PERIODIC_ENABLE
2942 periodics_reschedule (EV_A);
2943#endif
2944 }
2945
2946 mn_now = ev_rt_now;
2947 }
443} 2948}
444 2949
445int 2950int
446ev_version_minor (void) 2951ev_run (EV_P_ int flags)
447{ 2952{
448 return EV_VERSION_MINOR; 2953#if EV_FEATURE_API
449} 2954 ++loop_depth;
2955#endif
450 2956
451int ev_init (int flags) 2957 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
452{ 2958
453 if (!ev_method) 2959 loop_done = EVBREAK_CANCEL;
2960
2961 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2962
2963 do
454 { 2964 {
455#if EV_USE_MONOTONIC 2965#if EV_VERIFY >= 2
2966 ev_verify (EV_A);
2967#endif
2968
2969#ifndef _WIN32
2970 if (expect_false (curpid)) /* penalise the forking check even more */
2971 if (expect_false (getpid () != curpid))
2972 {
2973 curpid = getpid ();
2974 postfork = 1;
2975 }
2976#endif
2977
2978#if EV_FORK_ENABLE
2979 /* we might have forked, so queue fork handlers */
2980 if (expect_false (postfork))
2981 if (forkcnt)
2982 {
2983 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2984 EV_INVOKE_PENDING;
2985 }
2986#endif
2987
2988#if EV_PREPARE_ENABLE
2989 /* queue prepare watchers (and execute them) */
2990 if (expect_false (preparecnt))
2991 {
2992 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2993 EV_INVOKE_PENDING;
2994 }
2995#endif
2996
2997 if (expect_false (loop_done))
2998 break;
2999
3000 /* we might have forked, so reify kernel state if necessary */
3001 if (expect_false (postfork))
3002 loop_fork (EV_A);
3003
3004 /* update fd-related kernel structures */
3005 fd_reify (EV_A);
3006
3007 /* calculate blocking time */
456 { 3008 {
457 struct timespec ts; 3009 ev_tstamp waittime = 0.;
458 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 3010 ev_tstamp sleeptime = 0.;
459 have_monotonic = 1; 3011
3012 /* remember old timestamp for io_blocktime calculation */
3013 ev_tstamp prev_mn_now = mn_now;
3014
3015 /* update time to cancel out callback processing overhead */
3016 time_update (EV_A_ 1e100);
3017
3018 /* from now on, we want a pipe-wake-up */
3019 pipe_write_wanted = 1;
3020
3021 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3022
3023 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
3024 {
3025 waittime = MAX_BLOCKTIME;
3026
3027 if (timercnt)
3028 {
3029 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
3030 if (waittime > to) waittime = to;
3031 }
3032
3033#if EV_PERIODIC_ENABLE
3034 if (periodiccnt)
3035 {
3036 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
3037 if (waittime > to) waittime = to;
3038 }
3039#endif
3040
3041 /* don't let timeouts decrease the waittime below timeout_blocktime */
3042 if (expect_false (waittime < timeout_blocktime))
3043 waittime = timeout_blocktime;
3044
3045 /* at this point, we NEED to wait, so we have to ensure */
3046 /* to pass a minimum nonzero value to the backend */
3047 if (expect_false (waittime < backend_mintime))
3048 waittime = backend_mintime;
3049
3050 /* extra check because io_blocktime is commonly 0 */
3051 if (expect_false (io_blocktime))
3052 {
3053 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3054
3055 if (sleeptime > waittime - backend_mintime)
3056 sleeptime = waittime - backend_mintime;
3057
3058 if (expect_true (sleeptime > 0.))
3059 {
3060 ev_sleep (sleeptime);
3061 waittime -= sleeptime;
3062 }
3063 }
3064 }
3065
3066#if EV_FEATURE_API
3067 ++loop_count;
3068#endif
3069 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
3070 backend_poll (EV_A_ waittime);
3071 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3072
3073 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3074
3075 if (pipe_write_skipped)
3076 {
3077 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3078 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3079 }
3080
3081
3082 /* update ev_rt_now, do magic */
3083 time_update (EV_A_ waittime + sleeptime);
460 } 3084 }
461#endif
462 3085
463 ev_now = ev_time (); 3086 /* queue pending timers and reschedule them */
464 now = get_clock (); 3087 timers_reify (EV_A); /* relative timers called last */
465 diff = ev_now - now; 3088#if EV_PERIODIC_ENABLE
466 3089 periodics_reify (EV_A); /* absolute timers called first */
467 if (pipe (sigpipe))
468 return 0;
469
470 ev_method = EVMETHOD_NONE;
471#if EV_USE_EPOLL
472 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
473#endif 3090#endif
474#if EV_USE_SELECT
475 if (ev_method == EVMETHOD_NONE) select_init (flags);
476#endif
477 3091
478 if (ev_method) 3092#if EV_IDLE_ENABLE
3093 /* queue idle watchers unless other events are pending */
3094 idle_reify (EV_A);
3095#endif
3096
3097#if EV_CHECK_ENABLE
3098 /* queue check watchers, to be executed first */
3099 if (expect_false (checkcnt))
3100 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3101#endif
3102
3103 EV_INVOKE_PENDING;
3104 }
3105 while (expect_true (
3106 activecnt
3107 && !loop_done
3108 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3109 ));
3110
3111 if (loop_done == EVBREAK_ONE)
3112 loop_done = EVBREAK_CANCEL;
3113
3114#if EV_FEATURE_API
3115 --loop_depth;
3116#endif
3117
3118 return activecnt;
3119}
3120
3121void
3122ev_break (EV_P_ int how) EV_THROW
3123{
3124 loop_done = how;
3125}
3126
3127void
3128ev_ref (EV_P) EV_THROW
3129{
3130 ++activecnt;
3131}
3132
3133void
3134ev_unref (EV_P) EV_THROW
3135{
3136 --activecnt;
3137}
3138
3139void
3140ev_now_update (EV_P) EV_THROW
3141{
3142 time_update (EV_A_ 1e100);
3143}
3144
3145void
3146ev_suspend (EV_P) EV_THROW
3147{
3148 ev_now_update (EV_A);
3149}
3150
3151void
3152ev_resume (EV_P) EV_THROW
3153{
3154 ev_tstamp mn_prev = mn_now;
3155
3156 ev_now_update (EV_A);
3157 timers_reschedule (EV_A_ mn_now - mn_prev);
3158#if EV_PERIODIC_ENABLE
3159 /* TODO: really do this? */
3160 periodics_reschedule (EV_A);
3161#endif
3162}
3163
3164/*****************************************************************************/
3165/* singly-linked list management, used when the expected list length is short */
3166
3167inline_size void
3168wlist_add (WL *head, WL elem)
3169{
3170 elem->next = *head;
3171 *head = elem;
3172}
3173
3174inline_size void
3175wlist_del (WL *head, WL elem)
3176{
3177 while (*head)
3178 {
3179 if (expect_true (*head == elem))
479 { 3180 {
480 ev_watcher_init (&sigev, sigcb); 3181 *head = elem->next;
481 siginit (); 3182 break;
482
483 ev_signal_init (&childev, childcb, SIGCHLD);
484 ev_signal_start (&childev);
485 } 3183 }
3184
3185 head = &(*head)->next;
3186 }
3187}
3188
3189/* internal, faster, version of ev_clear_pending */
3190inline_speed void
3191clear_pending (EV_P_ W w)
3192{
3193 if (w->pending)
486 } 3194 {
3195 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
3196 w->pending = 0;
3197 }
3198}
487 3199
488 return ev_method; 3200int
3201ev_clear_pending (EV_P_ void *w) EV_THROW
3202{
3203 W w_ = (W)w;
3204 int pending = w_->pending;
3205
3206 if (expect_true (pending))
3207 {
3208 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3209 p->w = (W)&pending_w;
3210 w_->pending = 0;
3211 return p->events;
3212 }
3213 else
3214 return 0;
3215}
3216
3217inline_size void
3218pri_adjust (EV_P_ W w)
3219{
3220 int pri = ev_priority (w);
3221 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3222 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3223 ev_set_priority (w, pri);
3224}
3225
3226inline_speed void
3227ev_start (EV_P_ W w, int active)
3228{
3229 pri_adjust (EV_A_ w);
3230 w->active = active;
3231 ev_ref (EV_A);
3232}
3233
3234inline_size void
3235ev_stop (EV_P_ W w)
3236{
3237 ev_unref (EV_A);
3238 w->active = 0;
489} 3239}
490 3240
491/*****************************************************************************/ 3241/*****************************************************************************/
492 3242
493void 3243void noinline
494ev_prefork (void) 3244ev_io_start (EV_P_ ev_io *w) EV_THROW
495{ 3245{
496 /* nop */ 3246 int fd = w->fd;
497}
498 3247
499void 3248 if (expect_false (ev_is_active (w)))
500ev_postfork_parent (void) 3249 return;
501{
502 /* nop */
503}
504 3250
505void 3251 assert (("libev: ev_io_start called with negative fd", fd >= 0));
506ev_postfork_child (void) 3252 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
507{
508#if EV_USE_EPOLL
509 if (ev_method == EVMETHOD_EPOLL)
510 epoll_postfork_child ();
511#endif
512 3253
513 ev_io_stop (&sigev); 3254 EV_FREQUENT_CHECK;
514 close (sigpipe [0]);
515 close (sigpipe [1]);
516 pipe (sigpipe);
517 siginit ();
518}
519 3255
520/*****************************************************************************/ 3256 ev_start (EV_A_ (W)w, 1);
3257 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
3258 wlist_add (&anfds[fd].head, (WL)w);
521 3259
522static void 3260 /* common bug, apparently */
523call_pending (void) 3261 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3262
3263 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3264 w->events &= ~EV__IOFDSET;
3265
3266 EV_FREQUENT_CHECK;
3267}
3268
3269void noinline
3270ev_io_stop (EV_P_ ev_io *w) EV_THROW
524{ 3271{
525 while (pendingcnt) 3272 clear_pending (EV_A_ (W)w);
3273 if (expect_false (!ev_is_active (w)))
3274 return;
3275
3276 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3277
3278 EV_FREQUENT_CHECK;
3279
3280 wlist_del (&anfds[w->fd].head, (WL)w);
3281 ev_stop (EV_A_ (W)w);
3282
3283 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3284
3285 EV_FREQUENT_CHECK;
3286}
3287
3288void noinline
3289ev_timer_start (EV_P_ ev_timer *w) EV_THROW
3290{
3291 if (expect_false (ev_is_active (w)))
3292 return;
3293
3294 ev_at (w) += mn_now;
3295
3296 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
3297
3298 EV_FREQUENT_CHECK;
3299
3300 ++timercnt;
3301 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
3302 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
3303 ANHE_w (timers [ev_active (w)]) = (WT)w;
3304 ANHE_at_cache (timers [ev_active (w)]);
3305 upheap (timers, ev_active (w));
3306
3307 EV_FREQUENT_CHECK;
3308
3309 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
3310}
3311
3312void noinline
3313ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
3314{
3315 clear_pending (EV_A_ (W)w);
3316 if (expect_false (!ev_is_active (w)))
3317 return;
3318
3319 EV_FREQUENT_CHECK;
3320
526 { 3321 {
527 ANPENDING *p = pendings + --pendingcnt; 3322 int active = ev_active (w);
528 3323
529 if (p->w) 3324 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3325
3326 --timercnt;
3327
3328 if (expect_true (active < timercnt + HEAP0))
530 { 3329 {
531 p->w->pending = 0; 3330 timers [active] = timers [timercnt + HEAP0];
532 p->w->cb (p->w, p->events); 3331 adjustheap (timers, timercnt, active);
533 } 3332 }
3333 }
3334
3335 ev_at (w) -= mn_now;
3336
3337 ev_stop (EV_A_ (W)w);
3338
3339 EV_FREQUENT_CHECK;
3340}
3341
3342void noinline
3343ev_timer_again (EV_P_ ev_timer *w) EV_THROW
3344{
3345 EV_FREQUENT_CHECK;
3346
3347 clear_pending (EV_A_ (W)w);
3348
3349 if (ev_is_active (w))
534 } 3350 {
535}
536
537static void
538timers_reify (void)
539{
540 while (timercnt && timers [0]->at <= now)
541 {
542 struct ev_timer *w = timers [0];
543
544 /* first reschedule or stop timer */
545 if (w->repeat) 3351 if (w->repeat)
546 { 3352 {
547 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
548 w->at = now + w->repeat; 3353 ev_at (w) = mn_now + w->repeat;
549 downheap ((WT *)timers, timercnt, 0); 3354 ANHE_at_cache (timers [ev_active (w)]);
3355 adjustheap (timers, timercnt, ev_active (w));
550 } 3356 }
551 else 3357 else
552 ev_timer_stop (w); /* nonrepeating: stop timer */ 3358 ev_timer_stop (EV_A_ w);
553
554 event ((W)w, EV_TIMEOUT);
555 }
556}
557
558static void
559periodics_reify (void)
560{
561 while (periodiccnt && periodics [0]->at <= ev_now)
562 { 3359 }
563 struct ev_periodic *w = periodics [0]; 3360 else if (w->repeat)
3361 {
3362 ev_at (w) = w->repeat;
3363 ev_timer_start (EV_A_ w);
3364 }
564 3365
565 /* first reschedule or stop timer */ 3366 EV_FREQUENT_CHECK;
3367}
3368
3369ev_tstamp
3370ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3371{
3372 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3373}
3374
3375#if EV_PERIODIC_ENABLE
3376void noinline
3377ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
3378{
3379 if (expect_false (ev_is_active (w)))
3380 return;
3381
3382 if (w->reschedule_cb)
3383 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
566 if (w->interval) 3384 else if (w->interval)
3385 {
3386 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
3387 periodic_recalc (EV_A_ w);
3388 }
3389 else
3390 ev_at (w) = w->offset;
3391
3392 EV_FREQUENT_CHECK;
3393
3394 ++periodiccnt;
3395 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
3396 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
3397 ANHE_w (periodics [ev_active (w)]) = (WT)w;
3398 ANHE_at_cache (periodics [ev_active (w)]);
3399 upheap (periodics, ev_active (w));
3400
3401 EV_FREQUENT_CHECK;
3402
3403 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
3404}
3405
3406void noinline
3407ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
3408{
3409 clear_pending (EV_A_ (W)w);
3410 if (expect_false (!ev_is_active (w)))
3411 return;
3412
3413 EV_FREQUENT_CHECK;
3414
3415 {
3416 int active = ev_active (w);
3417
3418 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3419
3420 --periodiccnt;
3421
3422 if (expect_true (active < periodiccnt + HEAP0))
3423 {
3424 periodics [active] = periodics [periodiccnt + HEAP0];
3425 adjustheap (periodics, periodiccnt, active);
3426 }
3427 }
3428
3429 ev_stop (EV_A_ (W)w);
3430
3431 EV_FREQUENT_CHECK;
3432}
3433
3434void noinline
3435ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
3436{
3437 /* TODO: use adjustheap and recalculation */
3438 ev_periodic_stop (EV_A_ w);
3439 ev_periodic_start (EV_A_ w);
3440}
3441#endif
3442
3443#ifndef SA_RESTART
3444# define SA_RESTART 0
3445#endif
3446
3447#if EV_SIGNAL_ENABLE
3448
3449void noinline
3450ev_signal_start (EV_P_ ev_signal *w) EV_THROW
3451{
3452 if (expect_false (ev_is_active (w)))
3453 return;
3454
3455 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3456
3457#if EV_MULTIPLICITY
3458 assert (("libev: a signal must not be attached to two different loops",
3459 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3460
3461 signals [w->signum - 1].loop = EV_A;
3462#endif
3463
3464 EV_FREQUENT_CHECK;
3465
3466#if EV_USE_SIGNALFD
3467 if (sigfd == -2)
3468 {
3469 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3470 if (sigfd < 0 && errno == EINVAL)
3471 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3472
3473 if (sigfd >= 0)
567 { 3474 {
568 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 3475 fd_intern (sigfd); /* doing it twice will not hurt */
569 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); 3476
570 downheap ((WT *)periodics, periodiccnt, 0); 3477 sigemptyset (&sigfd_set);
3478
3479 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3480 ev_set_priority (&sigfd_w, EV_MAXPRI);
3481 ev_io_start (EV_A_ &sigfd_w);
3482 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3483 }
3484 }
3485
3486 if (sigfd >= 0)
3487 {
3488 /* TODO: check .head */
3489 sigaddset (&sigfd_set, w->signum);
3490 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3491
3492 signalfd (sigfd, &sigfd_set, 0);
3493 }
3494#endif
3495
3496 ev_start (EV_A_ (W)w, 1);
3497 wlist_add (&signals [w->signum - 1].head, (WL)w);
3498
3499 if (!((WL)w)->next)
3500# if EV_USE_SIGNALFD
3501 if (sigfd < 0) /*TODO*/
3502# endif
3503 {
3504# ifdef _WIN32
3505 evpipe_init (EV_A);
3506
3507 signal (w->signum, ev_sighandler);
3508# else
3509 struct sigaction sa;
3510
3511 evpipe_init (EV_A);
3512
3513 sa.sa_handler = ev_sighandler;
3514 sigfillset (&sa.sa_mask);
3515 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3516 sigaction (w->signum, &sa, 0);
3517
3518 if (origflags & EVFLAG_NOSIGMASK)
3519 {
3520 sigemptyset (&sa.sa_mask);
3521 sigaddset (&sa.sa_mask, w->signum);
3522 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3523 }
3524#endif
3525 }
3526
3527 EV_FREQUENT_CHECK;
3528}
3529
3530void noinline
3531ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
3532{
3533 clear_pending (EV_A_ (W)w);
3534 if (expect_false (!ev_is_active (w)))
3535 return;
3536
3537 EV_FREQUENT_CHECK;
3538
3539 wlist_del (&signals [w->signum - 1].head, (WL)w);
3540 ev_stop (EV_A_ (W)w);
3541
3542 if (!signals [w->signum - 1].head)
3543 {
3544#if EV_MULTIPLICITY
3545 signals [w->signum - 1].loop = 0; /* unattach from signal */
3546#endif
3547#if EV_USE_SIGNALFD
3548 if (sigfd >= 0)
3549 {
3550 sigset_t ss;
3551
3552 sigemptyset (&ss);
3553 sigaddset (&ss, w->signum);
3554 sigdelset (&sigfd_set, w->signum);
3555
3556 signalfd (sigfd, &sigfd_set, 0);
3557 sigprocmask (SIG_UNBLOCK, &ss, 0);
571 } 3558 }
572 else 3559 else
573 ev_periodic_stop (w); /* nonrepeating: stop timer */ 3560#endif
574 3561 signal (w->signum, SIG_DFL);
575 event ((W)w, EV_PERIODIC);
576 }
577}
578
579static void
580periodics_reschedule (ev_tstamp diff)
581{
582 int i;
583
584 /* adjust periodics after time jump */
585 for (i = 0; i < periodiccnt; ++i)
586 { 3562 }
587 struct ev_periodic *w = periodics [i];
588 3563
589 if (w->interval) 3564 EV_FREQUENT_CHECK;
3565}
3566
3567#endif
3568
3569#if EV_CHILD_ENABLE
3570
3571void
3572ev_child_start (EV_P_ ev_child *w) EV_THROW
3573{
3574#if EV_MULTIPLICITY
3575 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3576#endif
3577 if (expect_false (ev_is_active (w)))
3578 return;
3579
3580 EV_FREQUENT_CHECK;
3581
3582 ev_start (EV_A_ (W)w, 1);
3583 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3584
3585 EV_FREQUENT_CHECK;
3586}
3587
3588void
3589ev_child_stop (EV_P_ ev_child *w) EV_THROW
3590{
3591 clear_pending (EV_A_ (W)w);
3592 if (expect_false (!ev_is_active (w)))
3593 return;
3594
3595 EV_FREQUENT_CHECK;
3596
3597 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3598 ev_stop (EV_A_ (W)w);
3599
3600 EV_FREQUENT_CHECK;
3601}
3602
3603#endif
3604
3605#if EV_STAT_ENABLE
3606
3607# ifdef _WIN32
3608# undef lstat
3609# define lstat(a,b) _stati64 (a,b)
3610# endif
3611
3612#define DEF_STAT_INTERVAL 5.0074891
3613#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3614#define MIN_STAT_INTERVAL 0.1074891
3615
3616static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3617
3618#if EV_USE_INOTIFY
3619
3620/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3621# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3622
3623static void noinline
3624infy_add (EV_P_ ev_stat *w)
3625{
3626 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);
3627
3628 if (w->wd >= 0)
3629 {
3630 struct statfs sfs;
3631
3632 /* now local changes will be tracked by inotify, but remote changes won't */
3633 /* unless the filesystem is known to be local, we therefore still poll */
3634 /* also do poll on <2.6.25, but with normal frequency */
3635
3636 if (!fs_2625)
3637 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3638 else if (!statfs (w->path, &sfs)
3639 && (sfs.f_type == 0x1373 /* devfs */
3640 || sfs.f_type == 0xEF53 /* ext2/3 */
3641 || sfs.f_type == 0x3153464a /* jfs */
3642 || sfs.f_type == 0x52654973 /* reiser3 */
3643 || sfs.f_type == 0x01021994 /* tempfs */
3644 || sfs.f_type == 0x58465342 /* xfs */))
3645 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3646 else
3647 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3648 }
3649 else
3650 {
3651 /* can't use inotify, continue to stat */
3652 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3653
3654 /* if path is not there, monitor some parent directory for speedup hints */
3655 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3656 /* but an efficiency issue only */
3657 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
590 { 3658 {
591 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 3659 char path [4096];
3660 strcpy (path, w->path);
592 3661
593 if (fabs (diff) >= 1e-4) 3662 do
594 { 3663 {
595 ev_periodic_stop (w); 3664 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
596 ev_periodic_start (w); 3665 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
597 3666
598 i = 0; /* restart loop, inefficient, but time jumps should be rare */ 3667 char *pend = strrchr (path, '/');
3668
3669 if (!pend || pend == path)
3670 break;
3671
3672 *pend = 0;
3673 w->wd = inotify_add_watch (fs_fd, path, mask);
3674 }
3675 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3676 }
3677 }
3678
3679 if (w->wd >= 0)
3680 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3681
3682 /* now re-arm timer, if required */
3683 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3684 ev_timer_again (EV_A_ &w->timer);
3685 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3686}
3687
3688static void noinline
3689infy_del (EV_P_ ev_stat *w)
3690{
3691 int slot;
3692 int wd = w->wd;
3693
3694 if (wd < 0)
3695 return;
3696
3697 w->wd = -2;
3698 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3699 wlist_del (&fs_hash [slot].head, (WL)w);
3700
3701 /* remove this watcher, if others are watching it, they will rearm */
3702 inotify_rm_watch (fs_fd, wd);
3703}
3704
3705static void noinline
3706infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3707{
3708 if (slot < 0)
3709 /* overflow, need to check for all hash slots */
3710 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3711 infy_wd (EV_A_ slot, wd, ev);
3712 else
3713 {
3714 WL w_;
3715
3716 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3717 {
3718 ev_stat *w = (ev_stat *)w_;
3719 w_ = w_->next; /* lets us remove this watcher and all before it */
3720
3721 if (w->wd == wd || wd == -1)
3722 {
3723 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3724 {
3725 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3726 w->wd = -1;
3727 infy_add (EV_A_ w); /* re-add, no matter what */
3728 }
3729
3730 stat_timer_cb (EV_A_ &w->timer, 0);
599 } 3731 }
600 } 3732 }
601 } 3733 }
602} 3734}
603 3735
604static void 3736static void
605time_update (void) 3737infy_cb (EV_P_ ev_io *w, int revents)
606{ 3738{
3739 char buf [EV_INOTIFY_BUFSIZE];
607 int i; 3740 int ofs;
3741 int len = read (fs_fd, buf, sizeof (buf));
608 3742
609 ev_now = ev_time (); 3743 for (ofs = 0; ofs < len; )
610 3744 {
611 if (have_monotonic) 3745 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3746 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3747 ofs += sizeof (struct inotify_event) + ev->len;
612 { 3748 }
613 ev_tstamp odiff = diff; 3749}
614 3750
615 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 3751inline_size void ecb_cold
3752ev_check_2625 (EV_P)
3753{
3754 /* kernels < 2.6.25 are borked
3755 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3756 */
3757 if (ev_linux_version () < 0x020619)
3758 return;
3759
3760 fs_2625 = 1;
3761}
3762
3763inline_size int
3764infy_newfd (void)
3765{
3766#if defined IN_CLOEXEC && defined IN_NONBLOCK
3767 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3768 if (fd >= 0)
3769 return fd;
3770#endif
3771 return inotify_init ();
3772}
3773
3774inline_size void
3775infy_init (EV_P)
3776{
3777 if (fs_fd != -2)
3778 return;
3779
3780 fs_fd = -1;
3781
3782 ev_check_2625 (EV_A);
3783
3784 fs_fd = infy_newfd ();
3785
3786 if (fs_fd >= 0)
3787 {
3788 fd_intern (fs_fd);
3789 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3790 ev_set_priority (&fs_w, EV_MAXPRI);
3791 ev_io_start (EV_A_ &fs_w);
3792 ev_unref (EV_A);
3793 }
3794}
3795
3796inline_size void
3797infy_fork (EV_P)
3798{
3799 int slot;
3800
3801 if (fs_fd < 0)
3802 return;
3803
3804 ev_ref (EV_A);
3805 ev_io_stop (EV_A_ &fs_w);
3806 close (fs_fd);
3807 fs_fd = infy_newfd ();
3808
3809 if (fs_fd >= 0)
3810 {
3811 fd_intern (fs_fd);
3812 ev_io_set (&fs_w, fs_fd, EV_READ);
3813 ev_io_start (EV_A_ &fs_w);
3814 ev_unref (EV_A);
3815 }
3816
3817 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3818 {
3819 WL w_ = fs_hash [slot].head;
3820 fs_hash [slot].head = 0;
3821
3822 while (w_)
616 { 3823 {
617 now = get_clock (); 3824 ev_stat *w = (ev_stat *)w_;
618 diff = ev_now - now; 3825 w_ = w_->next; /* lets us add this watcher */
619 3826
620 if (fabs (odiff - diff) < MIN_TIMEJUMP) 3827 w->wd = -1;
621 return; /* all is well */
622 3828
623 ev_now = ev_time (); 3829 if (fs_fd >= 0)
3830 infy_add (EV_A_ w); /* re-add, no matter what */
3831 else
3832 {
3833 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3834 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3835 ev_timer_again (EV_A_ &w->timer);
3836 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3837 }
624 } 3838 }
625
626 periodics_reschedule (diff - odiff);
627 /* no timer adjustment, as the monotonic clock doesn't jump */
628 } 3839 }
3840}
3841
3842#endif
3843
3844#ifdef _WIN32
3845# define EV_LSTAT(p,b) _stati64 (p, b)
3846#else
3847# define EV_LSTAT(p,b) lstat (p, b)
3848#endif
3849
3850void
3851ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3852{
3853 if (lstat (w->path, &w->attr) < 0)
3854 w->attr.st_nlink = 0;
3855 else if (!w->attr.st_nlink)
3856 w->attr.st_nlink = 1;
3857}
3858
3859static void noinline
3860stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3861{
3862 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3863
3864 ev_statdata prev = w->attr;
3865 ev_stat_stat (EV_A_ w);
3866
3867 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3868 if (
3869 prev.st_dev != w->attr.st_dev
3870 || prev.st_ino != w->attr.st_ino
3871 || prev.st_mode != w->attr.st_mode
3872 || prev.st_nlink != w->attr.st_nlink
3873 || prev.st_uid != w->attr.st_uid
3874 || prev.st_gid != w->attr.st_gid
3875 || prev.st_rdev != w->attr.st_rdev
3876 || prev.st_size != w->attr.st_size
3877 || prev.st_atime != w->attr.st_atime
3878 || prev.st_mtime != w->attr.st_mtime
3879 || prev.st_ctime != w->attr.st_ctime
3880 ) {
3881 /* we only update w->prev on actual differences */
3882 /* in case we test more often than invoke the callback, */
3883 /* to ensure that prev is always different to attr */
3884 w->prev = prev;
3885
3886 #if EV_USE_INOTIFY
3887 if (fs_fd >= 0)
3888 {
3889 infy_del (EV_A_ w);
3890 infy_add (EV_A_ w);
3891 ev_stat_stat (EV_A_ w); /* avoid race... */
3892 }
3893 #endif
3894
3895 ev_feed_event (EV_A_ w, EV_STAT);
3896 }
3897}
3898
3899void
3900ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3901{
3902 if (expect_false (ev_is_active (w)))
3903 return;
3904
3905 ev_stat_stat (EV_A_ w);
3906
3907 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3908 w->interval = MIN_STAT_INTERVAL;
3909
3910 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3911 ev_set_priority (&w->timer, ev_priority (w));
3912
3913#if EV_USE_INOTIFY
3914 infy_init (EV_A);
3915
3916 if (fs_fd >= 0)
3917 infy_add (EV_A_ w);
629 else 3918 else
3919#endif
3920 {
3921 ev_timer_again (EV_A_ &w->timer);
3922 ev_unref (EV_A);
630 { 3923 }
631 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 3924
3925 ev_start (EV_A_ (W)w, 1);
3926
3927 EV_FREQUENT_CHECK;
3928}
3929
3930void
3931ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
3932{
3933 clear_pending (EV_A_ (W)w);
3934 if (expect_false (!ev_is_active (w)))
3935 return;
3936
3937 EV_FREQUENT_CHECK;
3938
3939#if EV_USE_INOTIFY
3940 infy_del (EV_A_ w);
3941#endif
3942
3943 if (ev_is_active (&w->timer))
3944 {
3945 ev_ref (EV_A);
3946 ev_timer_stop (EV_A_ &w->timer);
3947 }
3948
3949 ev_stop (EV_A_ (W)w);
3950
3951 EV_FREQUENT_CHECK;
3952}
3953#endif
3954
3955#if EV_IDLE_ENABLE
3956void
3957ev_idle_start (EV_P_ ev_idle *w) EV_THROW
3958{
3959 if (expect_false (ev_is_active (w)))
3960 return;
3961
3962 pri_adjust (EV_A_ (W)w);
3963
3964 EV_FREQUENT_CHECK;
3965
3966 {
3967 int active = ++idlecnt [ABSPRI (w)];
3968
3969 ++idleall;
3970 ev_start (EV_A_ (W)w, active);
3971
3972 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3973 idles [ABSPRI (w)][active - 1] = w;
3974 }
3975
3976 EV_FREQUENT_CHECK;
3977}
3978
3979void
3980ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
3981{
3982 clear_pending (EV_A_ (W)w);
3983 if (expect_false (!ev_is_active (w)))
3984 return;
3985
3986 EV_FREQUENT_CHECK;
3987
3988 {
3989 int active = ev_active (w);
3990
3991 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3992 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3993
3994 ev_stop (EV_A_ (W)w);
3995 --idleall;
3996 }
3997
3998 EV_FREQUENT_CHECK;
3999}
4000#endif
4001
4002#if EV_PREPARE_ENABLE
4003void
4004ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
4005{
4006 if (expect_false (ev_is_active (w)))
4007 return;
4008
4009 EV_FREQUENT_CHECK;
4010
4011 ev_start (EV_A_ (W)w, ++preparecnt);
4012 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
4013 prepares [preparecnt - 1] = w;
4014
4015 EV_FREQUENT_CHECK;
4016}
4017
4018void
4019ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
4020{
4021 clear_pending (EV_A_ (W)w);
4022 if (expect_false (!ev_is_active (w)))
4023 return;
4024
4025 EV_FREQUENT_CHECK;
4026
4027 {
4028 int active = ev_active (w);
4029
4030 prepares [active - 1] = prepares [--preparecnt];
4031 ev_active (prepares [active - 1]) = active;
4032 }
4033
4034 ev_stop (EV_A_ (W)w);
4035
4036 EV_FREQUENT_CHECK;
4037}
4038#endif
4039
4040#if EV_CHECK_ENABLE
4041void
4042ev_check_start (EV_P_ ev_check *w) EV_THROW
4043{
4044 if (expect_false (ev_is_active (w)))
4045 return;
4046
4047 EV_FREQUENT_CHECK;
4048
4049 ev_start (EV_A_ (W)w, ++checkcnt);
4050 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
4051 checks [checkcnt - 1] = w;
4052
4053 EV_FREQUENT_CHECK;
4054}
4055
4056void
4057ev_check_stop (EV_P_ ev_check *w) EV_THROW
4058{
4059 clear_pending (EV_A_ (W)w);
4060 if (expect_false (!ev_is_active (w)))
4061 return;
4062
4063 EV_FREQUENT_CHECK;
4064
4065 {
4066 int active = ev_active (w);
4067
4068 checks [active - 1] = checks [--checkcnt];
4069 ev_active (checks [active - 1]) = active;
4070 }
4071
4072 ev_stop (EV_A_ (W)w);
4073
4074 EV_FREQUENT_CHECK;
4075}
4076#endif
4077
4078#if EV_EMBED_ENABLE
4079void noinline
4080ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
4081{
4082 ev_run (w->other, EVRUN_NOWAIT);
4083}
4084
4085static void
4086embed_io_cb (EV_P_ ev_io *io, int revents)
4087{
4088 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
4089
4090 if (ev_cb (w))
4091 ev_feed_event (EV_A_ (W)w, EV_EMBED);
4092 else
4093 ev_run (w->other, EVRUN_NOWAIT);
4094}
4095
4096static void
4097embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4098{
4099 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4100
4101 {
4102 EV_P = w->other;
4103
4104 while (fdchangecnt)
632 { 4105 {
633 periodics_reschedule (ev_now - now); 4106 fd_reify (EV_A);
634 4107 ev_run (EV_A_ EVRUN_NOWAIT);
635 /* adjust timers. this is easy, as the offset is the same for all */
636 for (i = 0; i < timercnt; ++i)
637 timers [i]->at += diff;
638 } 4108 }
639
640 now = ev_now;
641 } 4109 }
642} 4110}
643 4111
644int ev_loop_done; 4112static void
645 4113embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
646void ev_loop (int flags)
647{ 4114{
648 double block; 4115 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
649 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
650 4116
651 do 4117 ev_embed_stop (EV_A_ w);
4118
652 { 4119 {
653 /* queue check watchers (and execute them) */ 4120 EV_P = w->other;
654 if (preparecnt)
655 {
656 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
657 call_pending ();
658 }
659 4121
660 /* update fd-related kernel structures */ 4122 ev_loop_fork (EV_A);
661 fd_reify (); 4123 ev_run (EV_A_ EVRUN_NOWAIT);
662
663 /* calculate blocking time */
664
665 /* we only need this for !monotonic clockor timers, but as we basically
666 always have timers, we just calculate it always */
667 ev_now = ev_time ();
668
669 if (flags & EVLOOP_NONBLOCK || idlecnt)
670 block = 0.;
671 else
672 {
673 block = MAX_BLOCKTIME;
674
675 if (timercnt)
676 {
677 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
678 if (block > to) block = to;
679 }
680
681 if (periodiccnt)
682 {
683 ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
684 if (block > to) block = to;
685 }
686
687 if (block < 0.) block = 0.;
688 }
689
690 method_poll (block);
691
692 /* update ev_now, do magic */
693 time_update ();
694
695 /* queue pending timers and reschedule them */
696 timers_reify (); /* relative timers called last */
697 periodics_reify (); /* absolute timers called first */
698
699 /* queue idle watchers unless io or timers are pending */
700 if (!pendingcnt)
701 queue_events ((W *)idles, idlecnt, EV_IDLE);
702
703 /* queue check watchers, to be executed first */
704 if (checkcnt)
705 queue_events ((W *)checks, checkcnt, EV_CHECK);
706
707 call_pending ();
708 } 4124 }
709 while (!ev_loop_done);
710 4125
711 if (ev_loop_done != 2) 4126 ev_embed_start (EV_A_ w);
712 ev_loop_done = 0;
713} 4127}
4128
4129#if 0
4130static void
4131embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4132{
4133 ev_idle_stop (EV_A_ idle);
4134}
4135#endif
4136
4137void
4138ev_embed_start (EV_P_ ev_embed *w) EV_THROW
4139{
4140 if (expect_false (ev_is_active (w)))
4141 return;
4142
4143 {
4144 EV_P = w->other;
4145 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4146 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4147 }
4148
4149 EV_FREQUENT_CHECK;
4150
4151 ev_set_priority (&w->io, ev_priority (w));
4152 ev_io_start (EV_A_ &w->io);
4153
4154 ev_prepare_init (&w->prepare, embed_prepare_cb);
4155 ev_set_priority (&w->prepare, EV_MINPRI);
4156 ev_prepare_start (EV_A_ &w->prepare);
4157
4158 ev_fork_init (&w->fork, embed_fork_cb);
4159 ev_fork_start (EV_A_ &w->fork);
4160
4161 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4162
4163 ev_start (EV_A_ (W)w, 1);
4164
4165 EV_FREQUENT_CHECK;
4166}
4167
4168void
4169ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
4170{
4171 clear_pending (EV_A_ (W)w);
4172 if (expect_false (!ev_is_active (w)))
4173 return;
4174
4175 EV_FREQUENT_CHECK;
4176
4177 ev_io_stop (EV_A_ &w->io);
4178 ev_prepare_stop (EV_A_ &w->prepare);
4179 ev_fork_stop (EV_A_ &w->fork);
4180
4181 ev_stop (EV_A_ (W)w);
4182
4183 EV_FREQUENT_CHECK;
4184}
4185#endif
4186
4187#if EV_FORK_ENABLE
4188void
4189ev_fork_start (EV_P_ ev_fork *w) EV_THROW
4190{
4191 if (expect_false (ev_is_active (w)))
4192 return;
4193
4194 EV_FREQUENT_CHECK;
4195
4196 ev_start (EV_A_ (W)w, ++forkcnt);
4197 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4198 forks [forkcnt - 1] = w;
4199
4200 EV_FREQUENT_CHECK;
4201}
4202
4203void
4204ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
4205{
4206 clear_pending (EV_A_ (W)w);
4207 if (expect_false (!ev_is_active (w)))
4208 return;
4209
4210 EV_FREQUENT_CHECK;
4211
4212 {
4213 int active = ev_active (w);
4214
4215 forks [active - 1] = forks [--forkcnt];
4216 ev_active (forks [active - 1]) = active;
4217 }
4218
4219 ev_stop (EV_A_ (W)w);
4220
4221 EV_FREQUENT_CHECK;
4222}
4223#endif
4224
4225#if EV_CLEANUP_ENABLE
4226void
4227ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4228{
4229 if (expect_false (ev_is_active (w)))
4230 return;
4231
4232 EV_FREQUENT_CHECK;
4233
4234 ev_start (EV_A_ (W)w, ++cleanupcnt);
4235 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4236 cleanups [cleanupcnt - 1] = w;
4237
4238 /* cleanup watchers should never keep a refcount on the loop */
4239 ev_unref (EV_A);
4240 EV_FREQUENT_CHECK;
4241}
4242
4243void
4244ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4245{
4246 clear_pending (EV_A_ (W)w);
4247 if (expect_false (!ev_is_active (w)))
4248 return;
4249
4250 EV_FREQUENT_CHECK;
4251 ev_ref (EV_A);
4252
4253 {
4254 int active = ev_active (w);
4255
4256 cleanups [active - 1] = cleanups [--cleanupcnt];
4257 ev_active (cleanups [active - 1]) = active;
4258 }
4259
4260 ev_stop (EV_A_ (W)w);
4261
4262 EV_FREQUENT_CHECK;
4263}
4264#endif
4265
4266#if EV_ASYNC_ENABLE
4267void
4268ev_async_start (EV_P_ ev_async *w) EV_THROW
4269{
4270 if (expect_false (ev_is_active (w)))
4271 return;
4272
4273 w->sent = 0;
4274
4275 evpipe_init (EV_A);
4276
4277 EV_FREQUENT_CHECK;
4278
4279 ev_start (EV_A_ (W)w, ++asynccnt);
4280 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4281 asyncs [asynccnt - 1] = w;
4282
4283 EV_FREQUENT_CHECK;
4284}
4285
4286void
4287ev_async_stop (EV_P_ ev_async *w) EV_THROW
4288{
4289 clear_pending (EV_A_ (W)w);
4290 if (expect_false (!ev_is_active (w)))
4291 return;
4292
4293 EV_FREQUENT_CHECK;
4294
4295 {
4296 int active = ev_active (w);
4297
4298 asyncs [active - 1] = asyncs [--asynccnt];
4299 ev_active (asyncs [active - 1]) = active;
4300 }
4301
4302 ev_stop (EV_A_ (W)w);
4303
4304 EV_FREQUENT_CHECK;
4305}
4306
4307void
4308ev_async_send (EV_P_ ev_async *w) EV_THROW
4309{
4310 w->sent = 1;
4311 evpipe_write (EV_A_ &async_pending);
4312}
4313#endif
714 4314
715/*****************************************************************************/ 4315/*****************************************************************************/
716 4316
717static void
718wlist_add (WL *head, WL elem)
719{
720 elem->next = *head;
721 *head = elem;
722}
723
724static void
725wlist_del (WL *head, WL elem)
726{
727 while (*head)
728 {
729 if (*head == elem)
730 {
731 *head = elem->next;
732 return;
733 }
734
735 head = &(*head)->next;
736 }
737}
738
739static void
740ev_clear_pending (W w)
741{
742 if (w->pending)
743 {
744 pendings [w->pending - 1].w = 0;
745 w->pending = 0;
746 }
747}
748
749static void
750ev_start (W w, int active)
751{
752 w->active = active;
753}
754
755static void
756ev_stop (W w)
757{
758 w->active = 0;
759}
760
761/*****************************************************************************/
762
763void
764ev_io_start (struct ev_io *w)
765{
766 if (ev_is_active (w))
767 return;
768
769 int fd = w->fd;
770
771 assert (("ev_io_start called with negative fd", fd >= 0));
772
773 ev_start ((W)w, 1);
774 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
775 wlist_add ((WL *)&anfds[fd].head, (WL)w);
776
777 fd_change (fd);
778}
779
780void
781ev_io_stop (struct ev_io *w)
782{
783 ev_clear_pending ((W)w);
784 if (!ev_is_active (w))
785 return;
786
787 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
788 ev_stop ((W)w);
789
790 fd_change (w->fd);
791}
792
793void
794ev_timer_start (struct ev_timer *w)
795{
796 if (ev_is_active (w))
797 return;
798
799 w->at += now;
800
801 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
802
803 ev_start ((W)w, ++timercnt);
804 array_needsize (timers, timermax, timercnt, );
805 timers [timercnt - 1] = w;
806 upheap ((WT *)timers, timercnt - 1);
807}
808
809void
810ev_timer_stop (struct ev_timer *w)
811{
812 ev_clear_pending ((W)w);
813 if (!ev_is_active (w))
814 return;
815
816 if (w->active < timercnt--)
817 {
818 timers [w->active - 1] = timers [timercnt];
819 downheap ((WT *)timers, timercnt, w->active - 1);
820 }
821
822 w->at = w->repeat;
823
824 ev_stop ((W)w);
825}
826
827void
828ev_timer_again (struct ev_timer *w)
829{
830 if (ev_is_active (w))
831 {
832 if (w->repeat)
833 {
834 w->at = now + w->repeat;
835 downheap ((WT *)timers, timercnt, w->active - 1);
836 }
837 else
838 ev_timer_stop (w);
839 }
840 else if (w->repeat)
841 ev_timer_start (w);
842}
843
844void
845ev_periodic_start (struct ev_periodic *w)
846{
847 if (ev_is_active (w))
848 return;
849
850 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
851
852 /* this formula differs from the one in periodic_reify because we do not always round up */
853 if (w->interval)
854 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
855
856 ev_start ((W)w, ++periodiccnt);
857 array_needsize (periodics, periodicmax, periodiccnt, );
858 periodics [periodiccnt - 1] = w;
859 upheap ((WT *)periodics, periodiccnt - 1);
860}
861
862void
863ev_periodic_stop (struct ev_periodic *w)
864{
865 ev_clear_pending ((W)w);
866 if (!ev_is_active (w))
867 return;
868
869 if (w->active < periodiccnt--)
870 {
871 periodics [w->active - 1] = periodics [periodiccnt];
872 downheap ((WT *)periodics, periodiccnt, w->active - 1);
873 }
874
875 ev_stop ((W)w);
876}
877
878void
879ev_signal_start (struct ev_signal *w)
880{
881 if (ev_is_active (w))
882 return;
883
884 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
885
886 ev_start ((W)w, 1);
887 array_needsize (signals, signalmax, w->signum, signals_init);
888 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
889
890 if (!w->next)
891 {
892 struct sigaction sa;
893 sa.sa_handler = sighandler;
894 sigfillset (&sa.sa_mask);
895 sa.sa_flags = 0;
896 sigaction (w->signum, &sa, 0);
897 }
898}
899
900void
901ev_signal_stop (struct ev_signal *w)
902{
903 ev_clear_pending ((W)w);
904 if (!ev_is_active (w))
905 return;
906
907 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
908 ev_stop ((W)w);
909
910 if (!signals [w->signum - 1].head)
911 signal (w->signum, SIG_DFL);
912}
913
914void
915ev_idle_start (struct ev_idle *w)
916{
917 if (ev_is_active (w))
918 return;
919
920 ev_start ((W)w, ++idlecnt);
921 array_needsize (idles, idlemax, idlecnt, );
922 idles [idlecnt - 1] = w;
923}
924
925void
926ev_idle_stop (struct ev_idle *w)
927{
928 ev_clear_pending ((W)w);
929 if (ev_is_active (w))
930 return;
931
932 idles [w->active - 1] = idles [--idlecnt];
933 ev_stop ((W)w);
934}
935
936void
937ev_prepare_start (struct ev_prepare *w)
938{
939 if (ev_is_active (w))
940 return;
941
942 ev_start ((W)w, ++preparecnt);
943 array_needsize (prepares, preparemax, preparecnt, );
944 prepares [preparecnt - 1] = w;
945}
946
947void
948ev_prepare_stop (struct ev_prepare *w)
949{
950 ev_clear_pending ((W)w);
951 if (ev_is_active (w))
952 return;
953
954 prepares [w->active - 1] = prepares [--preparecnt];
955 ev_stop ((W)w);
956}
957
958void
959ev_check_start (struct ev_check *w)
960{
961 if (ev_is_active (w))
962 return;
963
964 ev_start ((W)w, ++checkcnt);
965 array_needsize (checks, checkmax, checkcnt, );
966 checks [checkcnt - 1] = w;
967}
968
969void
970ev_check_stop (struct ev_check *w)
971{
972 ev_clear_pending ((W)w);
973 if (ev_is_active (w))
974 return;
975
976 checks [w->active - 1] = checks [--checkcnt];
977 ev_stop ((W)w);
978}
979
980void
981ev_child_start (struct ev_child *w)
982{
983 if (ev_is_active (w))
984 return;
985
986 ev_start ((W)w, 1);
987 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
988}
989
990void
991ev_child_stop (struct ev_child *w)
992{
993 ev_clear_pending ((W)w);
994 if (ev_is_active (w))
995 return;
996
997 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
998 ev_stop ((W)w);
999}
1000
1001/*****************************************************************************/
1002
1003struct ev_once 4317struct ev_once
1004{ 4318{
1005 struct ev_io io; 4319 ev_io io;
1006 struct ev_timer to; 4320 ev_timer to;
1007 void (*cb)(int revents, void *arg); 4321 void (*cb)(int revents, void *arg);
1008 void *arg; 4322 void *arg;
1009}; 4323};
1010 4324
1011static void 4325static void
1012once_cb (struct ev_once *once, int revents) 4326once_cb (EV_P_ struct ev_once *once, int revents)
1013{ 4327{
1014 void (*cb)(int revents, void *arg) = once->cb; 4328 void (*cb)(int revents, void *arg) = once->cb;
1015 void *arg = once->arg; 4329 void *arg = once->arg;
1016 4330
1017 ev_io_stop (&once->io); 4331 ev_io_stop (EV_A_ &once->io);
1018 ev_timer_stop (&once->to); 4332 ev_timer_stop (EV_A_ &once->to);
1019 free (once); 4333 ev_free (once);
1020 4334
1021 cb (revents, arg); 4335 cb (revents, arg);
1022} 4336}
1023 4337
1024static void 4338static void
1025once_cb_io (struct ev_io *w, int revents) 4339once_cb_io (EV_P_ ev_io *w, int revents)
1026{ 4340{
1027 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4341 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4342
4343 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1028} 4344}
1029 4345
1030static void 4346static void
1031once_cb_to (struct ev_timer *w, int revents) 4347once_cb_to (EV_P_ ev_timer *w, int revents)
1032{ 4348{
1033 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4349 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4350
4351 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1034} 4352}
1035 4353
1036void 4354void
1037ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4355ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
1038{ 4356{
1039 struct ev_once *once = malloc (sizeof (struct ev_once)); 4357 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1040 4358
1041 if (!once) 4359 if (expect_false (!once))
4360 {
1042 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4361 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1043 else 4362 return;
1044 { 4363 }
4364
1045 once->cb = cb; 4365 once->cb = cb;
1046 once->arg = arg; 4366 once->arg = arg;
1047 4367
1048 ev_watcher_init (&once->io, once_cb_io); 4368 ev_init (&once->io, once_cb_io);
1049 if (fd >= 0) 4369 if (fd >= 0)
4370 {
4371 ev_io_set (&once->io, fd, events);
4372 ev_io_start (EV_A_ &once->io);
4373 }
4374
4375 ev_init (&once->to, once_cb_to);
4376 if (timeout >= 0.)
4377 {
4378 ev_timer_set (&once->to, timeout, 0.);
4379 ev_timer_start (EV_A_ &once->to);
4380 }
4381}
4382
4383/*****************************************************************************/
4384
4385#if EV_WALK_ENABLE
4386void ecb_cold
4387ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4388{
4389 int i, j;
4390 ev_watcher_list *wl, *wn;
4391
4392 if (types & (EV_IO | EV_EMBED))
4393 for (i = 0; i < anfdmax; ++i)
4394 for (wl = anfds [i].head; wl; )
1050 { 4395 {
1051 ev_io_set (&once->io, fd, events); 4396 wn = wl->next;
1052 ev_io_start (&once->io); 4397
4398#if EV_EMBED_ENABLE
4399 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4400 {
4401 if (types & EV_EMBED)
4402 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4403 }
4404 else
4405#endif
4406#if EV_USE_INOTIFY
4407 if (ev_cb ((ev_io *)wl) == infy_cb)
4408 ;
4409 else
4410#endif
4411 if ((ev_io *)wl != &pipe_w)
4412 if (types & EV_IO)
4413 cb (EV_A_ EV_IO, wl);
4414
4415 wl = wn;
1053 } 4416 }
1054 4417
1055 ev_watcher_init (&once->to, once_cb_to); 4418 if (types & (EV_TIMER | EV_STAT))
1056 if (timeout >= 0.) 4419 for (i = timercnt + HEAP0; i-- > HEAP0; )
4420#if EV_STAT_ENABLE
4421 /*TODO: timer is not always active*/
4422 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1057 { 4423 {
1058 ev_timer_set (&once->to, timeout, 0.); 4424 if (types & EV_STAT)
1059 ev_timer_start (&once->to); 4425 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1060 } 4426 }
1061 } 4427 else
1062} 4428#endif
4429 if (types & EV_TIMER)
4430 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1063 4431
1064/*****************************************************************************/ 4432#if EV_PERIODIC_ENABLE
4433 if (types & EV_PERIODIC)
4434 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4435 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4436#endif
1065 4437
1066#if 0 4438#if EV_IDLE_ENABLE
4439 if (types & EV_IDLE)
4440 for (j = NUMPRI; j--; )
4441 for (i = idlecnt [j]; i--; )
4442 cb (EV_A_ EV_IDLE, idles [j][i]);
4443#endif
1067 4444
1068struct ev_io wio; 4445#if EV_FORK_ENABLE
4446 if (types & EV_FORK)
4447 for (i = forkcnt; i--; )
4448 if (ev_cb (forks [i]) != embed_fork_cb)
4449 cb (EV_A_ EV_FORK, forks [i]);
4450#endif
1069 4451
1070static void 4452#if EV_ASYNC_ENABLE
1071sin_cb (struct ev_io *w, int revents) 4453 if (types & EV_ASYNC)
1072{ 4454 for (i = asynccnt; i--; )
1073 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 4455 cb (EV_A_ EV_ASYNC, asyncs [i]);
1074} 4456#endif
1075 4457
1076static void 4458#if EV_PREPARE_ENABLE
1077ocb (struct ev_timer *w, int revents) 4459 if (types & EV_PREPARE)
1078{ 4460 for (i = preparecnt; i--; )
1079 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 4461# if EV_EMBED_ENABLE
1080 ev_timer_stop (w); 4462 if (ev_cb (prepares [i]) != embed_prepare_cb)
1081 ev_timer_start (w);
1082}
1083
1084static void
1085scb (struct ev_signal *w, int revents)
1086{
1087 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1088 ev_io_stop (&wio);
1089 ev_io_start (&wio);
1090}
1091
1092static void
1093gcb (struct ev_signal *w, int revents)
1094{
1095 fprintf (stderr, "generic %x\n", revents);
1096
1097}
1098
1099int main (void)
1100{
1101 ev_init (0);
1102
1103 ev_io_init (&wio, sin_cb, 0, EV_READ);
1104 ev_io_start (&wio);
1105
1106 struct ev_timer t[10000];
1107
1108#if 0
1109 int i;
1110 for (i = 0; i < 10000; ++i)
1111 {
1112 struct ev_timer *w = t + i;
1113 ev_watcher_init (w, ocb, i);
1114 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1115 ev_timer_start (w);
1116 if (drand48 () < 0.5)
1117 ev_timer_stop (w);
1118 }
1119#endif 4463# endif
1120 4464 cb (EV_A_ EV_PREPARE, prepares [i]);
1121 struct ev_timer t1;
1122 ev_timer_init (&t1, ocb, 5, 10);
1123 ev_timer_start (&t1);
1124
1125 struct ev_signal sig;
1126 ev_signal_init (&sig, scb, SIGQUIT);
1127 ev_signal_start (&sig);
1128
1129 struct ev_check cw;
1130 ev_check_init (&cw, gcb);
1131 ev_check_start (&cw);
1132
1133 struct ev_idle iw;
1134 ev_idle_init (&iw, gcb);
1135 ev_idle_start (&iw);
1136
1137 ev_loop (0);
1138
1139 return 0;
1140}
1141
1142#endif 4465#endif
1143 4466
4467#if EV_CHECK_ENABLE
4468 if (types & EV_CHECK)
4469 for (i = checkcnt; i--; )
4470 cb (EV_A_ EV_CHECK, checks [i]);
4471#endif
1144 4472
4473#if EV_SIGNAL_ENABLE
4474 if (types & EV_SIGNAL)
4475 for (i = 0; i < EV_NSIG - 1; ++i)
4476 for (wl = signals [i].head; wl; )
4477 {
4478 wn = wl->next;
4479 cb (EV_A_ EV_SIGNAL, wl);
4480 wl = wn;
4481 }
4482#endif
1145 4483
4484#if EV_CHILD_ENABLE
4485 if (types & EV_CHILD)
4486 for (i = (EV_PID_HASHSIZE); i--; )
4487 for (wl = childs [i]; wl; )
4488 {
4489 wn = wl->next;
4490 cb (EV_A_ EV_CHILD, wl);
4491 wl = wn;
4492 }
4493#endif
4494/* EV_STAT 0x00001000 /* stat data changed */
4495/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4496}
4497#endif
1146 4498
4499#if EV_MULTIPLICITY
4500 #include "ev_wrap.h"
4501#endif
4502

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