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Comparing libev/ev.c (file contents):
Revision 1.3 by root, Tue Oct 30 21:45:00 2007 UTC vs.
Revision 1.392 by root, Thu Aug 4 14:37:49 2011 UTC

1#include <math.h> 1/*
2 * libev event processing core, watcher management
3 *
4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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.
38 */
39
40/* this big block deduces configuration from config.h */
41#ifndef EV_STANDALONE
42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H
44# else
45# include "config.h"
46# endif
47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined(EV_USE_CLOCK_SYSCALL)
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
67
68# if HAVE_CLOCK_GETTIME
69# ifndef EV_USE_MONOTONIC
70# define EV_USE_MONOTONIC 1
71# endif
72# ifndef EV_USE_REALTIME
73# define EV_USE_REALTIME 0
74# endif
75# else
76# ifndef EV_USE_MONOTONIC
77# define EV_USE_MONOTONIC 0
78# endif
79# ifndef EV_USE_REALTIME
80# define EV_USE_REALTIME 0
81# endif
82# endif
83
84# if HAVE_NANOSLEEP
85# ifndef EV_USE_NANOSLEEP
86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
88# else
89# undef EV_USE_NANOSLEEP
90# define EV_USE_NANOSLEEP 0
91# endif
92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
94# ifndef EV_USE_SELECT
95# define EV_USE_SELECT EV_FEATURE_BACKENDS
96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
100# endif
101
102# if HAVE_POLL && HAVE_POLL_H
103# ifndef EV_USE_POLL
104# define EV_USE_POLL EV_FEATURE_BACKENDS
105# endif
106# else
107# undef EV_USE_POLL
108# define EV_USE_POLL 0
109# endif
110
111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
112# ifndef EV_USE_EPOLL
113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
118# endif
119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
121# ifndef EV_USE_KQUEUE
122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
127# endif
128
129# if HAVE_PORT_H && HAVE_PORT_CREATE
130# ifndef EV_USE_PORT
131# define EV_USE_PORT EV_FEATURE_BACKENDS
132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
136# endif
137
138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
139# ifndef EV_USE_INOTIFY
140# define EV_USE_INOTIFY EV_FEATURE_OS
141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
145# endif
146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
149# define EV_USE_SIGNALFD EV_FEATURE_OS
150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
154# endif
155
156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
163# endif
164
165#endif
166
2#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
169#include <fcntl.h>
170#include <stddef.h>
3 171
4#include <stdio.h> 172#include <stdio.h>
5 173
174#include <assert.h>
6#include <errno.h> 175#include <errno.h>
7#include <sys/time.h> 176#include <sys/types.h>
8#include <time.h> 177#include <time.h>
178#include <limits.h>
9 179
180#include <signal.h>
181
182#ifdef EV_H
183# include EV_H
184#else
185# include "ev.h"
186#endif
187
188EV_CPP(extern "C" {)
189
190#ifndef _WIN32
191# include <sys/time.h>
192# include <sys/wait.h>
193# include <unistd.h>
194#else
195# include <io.h>
196# define WIN32_LEAN_AND_MEAN
197# include <windows.h>
198# ifndef EV_SELECT_IS_WINSOCKET
199# define EV_SELECT_IS_WINSOCKET 1
200# endif
201# undef EV_AVOID_STDIO
202#endif
203
204/* OS X, in its infinite idiocy, actually HARDCODES
205 * a limit of 1024 into their select. Where people have brains,
206 * OS X engineers apparently have a vacuum. Or maybe they were
207 * ordered to have a vacuum, or they do anything for money.
208 * This might help. Or not.
209 */
210#define _DARWIN_UNLIMITED_SELECT 1
211
212/* this block tries to deduce configuration from header-defined symbols and defaults */
213
214/* try to deduce the maximum number of signals on this platform */
215#if defined (EV_NSIG)
216/* use what's provided */
217#elif defined (NSIG)
218# define EV_NSIG (NSIG)
219#elif defined(_NSIG)
220# define EV_NSIG (_NSIG)
221#elif defined (SIGMAX)
222# define EV_NSIG (SIGMAX+1)
223#elif defined (SIG_MAX)
224# define EV_NSIG (SIG_MAX+1)
225#elif defined (_SIG_MAX)
226# define EV_NSIG (_SIG_MAX+1)
227#elif defined (MAXSIG)
228# define EV_NSIG (MAXSIG+1)
229#elif defined (MAX_SIG)
230# define EV_NSIG (MAX_SIG+1)
231#elif defined (SIGARRAYSIZE)
232# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
233#elif defined (_sys_nsig)
234# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
235#else
236# error "unable to find value for NSIG, please report"
237/* to make it compile regardless, just remove the above line, */
238/* but consider reporting it, too! :) */
239# define EV_NSIG 65
240#endif
241
242#ifndef EV_USE_FLOOR
243# define EV_USE_FLOOR 0
244#endif
245
246#ifndef EV_USE_CLOCK_SYSCALL
247# if __linux && __GLIBC__ >= 2
248# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
249# else
250# define EV_USE_CLOCK_SYSCALL 0
251# endif
252#endif
253
254#ifndef EV_USE_MONOTONIC
255# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
256# define EV_USE_MONOTONIC EV_FEATURE_OS
257# else
258# define EV_USE_MONOTONIC 0
259# endif
260#endif
261
262#ifndef EV_USE_REALTIME
263# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
264#endif
265
266#ifndef EV_USE_NANOSLEEP
267# if _POSIX_C_SOURCE >= 199309L
268# define EV_USE_NANOSLEEP EV_FEATURE_OS
269# else
270# define EV_USE_NANOSLEEP 0
271# endif
272#endif
273
274#ifndef EV_USE_SELECT
275# define EV_USE_SELECT EV_FEATURE_BACKENDS
276#endif
277
278#ifndef EV_USE_POLL
279# ifdef _WIN32
280# define EV_USE_POLL 0
281# else
282# define EV_USE_POLL EV_FEATURE_BACKENDS
283# endif
284#endif
285
286#ifndef EV_USE_EPOLL
287# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
288# define EV_USE_EPOLL EV_FEATURE_BACKENDS
289# else
290# define EV_USE_EPOLL 0
291# endif
292#endif
293
294#ifndef EV_USE_KQUEUE
295# define EV_USE_KQUEUE 0
296#endif
297
298#ifndef EV_USE_PORT
299# define EV_USE_PORT 0
300#endif
301
302#ifndef EV_USE_INOTIFY
303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
304# define EV_USE_INOTIFY EV_FEATURE_OS
305# else
306# define EV_USE_INOTIFY 0
307# endif
308#endif
309
310#ifndef EV_PID_HASHSIZE
311# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
312#endif
313
314#ifndef EV_INOTIFY_HASHSIZE
315# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
316#endif
317
318#ifndef EV_USE_EVENTFD
319# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
320# define EV_USE_EVENTFD EV_FEATURE_OS
321# else
322# define EV_USE_EVENTFD 0
323# endif
324#endif
325
326#ifndef EV_USE_SIGNALFD
327# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
328# define EV_USE_SIGNALFD EV_FEATURE_OS
329# else
330# define EV_USE_SIGNALFD 0
331# endif
332#endif
333
334#if 0 /* debugging */
335# define EV_VERIFY 3
336# define EV_USE_4HEAP 1
337# define EV_HEAP_CACHE_AT 1
338#endif
339
340#ifndef EV_VERIFY
341# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
342#endif
343
344#ifndef EV_USE_4HEAP
345# define EV_USE_4HEAP EV_FEATURE_DATA
346#endif
347
348#ifndef EV_HEAP_CACHE_AT
349# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
350#endif
351
352/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
353/* which makes programs even slower. might work on other unices, too. */
354#if EV_USE_CLOCK_SYSCALL
355# include <syscall.h>
356# ifdef SYS_clock_gettime
357# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
358# undef EV_USE_MONOTONIC
359# define EV_USE_MONOTONIC 1
360# else
361# undef EV_USE_CLOCK_SYSCALL
362# define EV_USE_CLOCK_SYSCALL 0
363# endif
364#endif
365
366/* this block fixes any misconfiguration where we know we run into trouble otherwise */
367
368#ifdef _AIX
369/* AIX has a completely broken poll.h header */
370# undef EV_USE_POLL
371# define EV_USE_POLL 0
372#endif
373
10#ifdef CLOCK_MONOTONIC 374#ifndef CLOCK_MONOTONIC
375# undef EV_USE_MONOTONIC
11# define HAVE_MONOTONIC 1 376# define EV_USE_MONOTONIC 0
377#endif
378
379#ifndef CLOCK_REALTIME
380# undef EV_USE_REALTIME
381# define EV_USE_REALTIME 0
382#endif
383
384#if !EV_STAT_ENABLE
385# undef EV_USE_INOTIFY
386# define EV_USE_INOTIFY 0
387#endif
388
389#if !EV_USE_NANOSLEEP
390/* hp-ux has it in sys/time.h, which we unconditionally include above */
391# if !defined(_WIN32) && !defined(__hpux)
392# include <sys/select.h>
12#endif 393# endif
394#endif
13 395
14#define HAVE_EPOLL 1 396#if EV_USE_INOTIFY
15#define HAVE_REALTIME 1 397# include <sys/statfs.h>
16#define HAVE_SELECT 0 398# include <sys/inotify.h>
399/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
400# ifndef IN_DONT_FOLLOW
401# undef EV_USE_INOTIFY
402# define EV_USE_INOTIFY 0
403# endif
404#endif
17 405
18#define MAX_BLOCKTIME 60. 406#if EV_SELECT_IS_WINSOCKET
407# include <winsock.h>
408#endif
19 409
20#include "ev.h" 410#if EV_USE_EVENTFD
411/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
412# include <stdint.h>
413# ifndef EFD_NONBLOCK
414# define EFD_NONBLOCK O_NONBLOCK
415# endif
416# ifndef EFD_CLOEXEC
417# ifdef O_CLOEXEC
418# define EFD_CLOEXEC O_CLOEXEC
419# else
420# define EFD_CLOEXEC 02000000
421# endif
422# endif
423EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
424#endif
21 425
22struct ev_watcher { 426#if EV_USE_SIGNALFD
23 EV_WATCHER (ev_watcher); 427/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
428# include <stdint.h>
429# ifndef SFD_NONBLOCK
430# define SFD_NONBLOCK O_NONBLOCK
431# endif
432# ifndef SFD_CLOEXEC
433# ifdef O_CLOEXEC
434# define SFD_CLOEXEC O_CLOEXEC
435# else
436# define SFD_CLOEXEC 02000000
437# endif
438# endif
439EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
440
441struct signalfd_siginfo
442{
443 uint32_t ssi_signo;
444 char pad[128 - sizeof (uint32_t)];
24}; 445};
446#endif
25 447
26struct ev_watcher_list { 448/**/
27 EV_WATCHER_LIST (ev_watcher_list);
28};
29 449
450#if EV_VERIFY >= 3
451# define EV_FREQUENT_CHECK ev_verify (EV_A)
452#else
453# define EV_FREQUENT_CHECK do { } while (0)
454#endif
455
456/*
457 * This is used to work around floating point rounding problems.
458 * This value is good at least till the year 4000.
459 */
460#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
461/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
462
463#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
464#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
465
466#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
467#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
468
469/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
470/* ECB.H BEGIN */
471/*
472 * libecb - http://software.schmorp.de/pkg/libecb
473 *
474 * Copyright (©) 2009-2011 Marc Alexander Lehmann <libecb@schmorp.de>
475 * Copyright (©) 2011 Emanuele Giaquinta
476 * All rights reserved.
477 *
478 * Redistribution and use in source and binary forms, with or without modifica-
479 * tion, are permitted provided that the following conditions are met:
480 *
481 * 1. Redistributions of source code must retain the above copyright notice,
482 * this list of conditions and the following disclaimer.
483 *
484 * 2. Redistributions in binary form must reproduce the above copyright
485 * notice, this list of conditions and the following disclaimer in the
486 * documentation and/or other materials provided with the distribution.
487 *
488 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
489 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
490 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
491 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
492 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
493 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
494 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
495 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
496 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
497 * OF THE POSSIBILITY OF SUCH DAMAGE.
498 */
499
500#ifndef ECB_H
501#define ECB_H
502
503#ifdef _WIN32
504 typedef signed char int8_t;
505 typedef unsigned char uint8_t;
506 typedef signed short int16_t;
507 typedef unsigned short uint16_t;
508 typedef signed int int32_t;
509 typedef unsigned int uint32_t;
510 #if __GNUC__
511 typedef signed long long int64_t;
512 typedef unsigned long long uint64_t;
513 #else /* _MSC_VER || __BORLANDC__ */
514 typedef signed __int64 int64_t;
515 typedef unsigned __int64 uint64_t;
516 #endif
517#else
518 #include <inttypes.h>
519#endif
520
521/* many compilers define _GNUC_ to some versions but then only implement
522 * what their idiot authors think are the "more important" extensions,
523 * causing enormous grief in return for some better fake benchmark numbers.
524 * or so.
525 * we try to detect these and simply assume they are not gcc - if they have
526 * an issue with that they should have done it right in the first place.
527 */
528#ifndef ECB_GCC_VERSION
529 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__)
530 #define ECB_GCC_VERSION(major,minor) 0
531 #else
532 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
533 #endif
534#endif
535
536/*****************************************************************************/
537
538/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
539/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
540
541#if ECB_NO_THREADS || ECB_NO_SMP
542 #define ECB_MEMORY_FENCE do { } while (0)
543 #define ECB_MEMORY_FENCE_ACQUIRE do { } while (0)
544 #define ECB_MEMORY_FENCE_RELEASE do { } while (0)
545#endif
546
547#ifndef ECB_MEMORY_FENCE
548 #if ECB_GCC_VERSION(2,5)
549 #if __x86
550 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
551 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
552 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
553 #elif __amd64
554 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
555 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
556 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
557 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
558 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
559 #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \
560 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__) \
561 || defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \
562 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )
563 #define ECB_MEMORY_FENCE \
564 do { \
565 int null = 0; \
566 __asm__ __volatile__ ("mcr p15,0,%0,c6,c10,5", : "=&r" (null) : : "memory"); \
567 while (0)
568 #endif
569 #endif
570#endif
571
572#ifndef ECB_MEMORY_FENCE
573 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER)
574 #define ECB_MEMORY_FENCE __sync_synchronize ()
575 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
576 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
577 #elif _MSC_VER >= 1400 /* VC++ 2005 */
578 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
579 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
580 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
581 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
582 #elif defined(_WIN32)
583 #include <WinNT.h>
584 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
585 #endif
586#endif
587
588#ifndef ECB_MEMORY_FENCE
589 #if !ECB_AVOID_PTHREADS
590 /*
591 * if you get undefined symbol references to pthread_mutex_lock,
592 * or failure to find pthread.h, then you should implement
593 * the ECB_MEMORY_FENCE operations for your cpu/compiler
594 * OR provide pthread.h and link against the posix thread library
595 * of your system.
596 */
597 #include <pthread.h>
598 #define ECB_NEEDS_PTHREADS 1
599 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
600
601 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
602 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
603 #endif
604#endif
605
606#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
607 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
608#endif
609
610#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
611 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
612#endif
613
614/*****************************************************************************/
615
616#define ECB_C99 (__STDC_VERSION__ >= 199901L)
617
618#if __cplusplus
619 #define ecb_inline static inline
620#elif ECB_GCC_VERSION(2,5)
621 #define ecb_inline static __inline__
622#elif ECB_C99
623 #define ecb_inline static inline
624#else
625 #define ecb_inline static
626#endif
627
628#if ECB_GCC_VERSION(3,3)
629 #define ecb_restrict __restrict__
630#elif ECB_C99
631 #define ecb_restrict restrict
632#else
633 #define ecb_restrict
634#endif
635
636typedef int ecb_bool;
637
638#define ECB_CONCAT_(a, b) a ## b
639#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
640#define ECB_STRINGIFY_(a) # a
641#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
642
643#define ecb_function_ ecb_inline
644
645#if ECB_GCC_VERSION(3,1)
646 #define ecb_attribute(attrlist) __attribute__(attrlist)
647 #define ecb_is_constant(expr) __builtin_constant_p (expr)
648 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
649 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
650#else
651 #define ecb_attribute(attrlist)
652 #define ecb_is_constant(expr) 0
653 #define ecb_expect(expr,value) (expr)
654 #define ecb_prefetch(addr,rw,locality)
655#endif
656
657/* no emulation for ecb_decltype */
658#if ECB_GCC_VERSION(4,5)
659 #define ecb_decltype(x) __decltype(x)
660#elif ECB_GCC_VERSION(3,0)
661 #define ecb_decltype(x) __typeof(x)
662#endif
663
664#define ecb_noinline ecb_attribute ((__noinline__))
665#define ecb_noreturn ecb_attribute ((__noreturn__))
666#define ecb_unused ecb_attribute ((__unused__))
667#define ecb_const ecb_attribute ((__const__))
668#define ecb_pure ecb_attribute ((__pure__))
669
670#if ECB_GCC_VERSION(4,3)
671 #define ecb_artificial ecb_attribute ((__artificial__))
672 #define ecb_hot ecb_attribute ((__hot__))
673 #define ecb_cold ecb_attribute ((__cold__))
674#else
675 #define ecb_artificial
676 #define ecb_hot
677 #define ecb_cold
678#endif
679
680/* put around conditional expressions if you are very sure that the */
681/* expression is mostly true or mostly false. note that these return */
682/* booleans, not the expression. */
683#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
684#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
685/* for compatibility to the rest of the world */
686#define ecb_likely(expr) ecb_expect_true (expr)
687#define ecb_unlikely(expr) ecb_expect_false (expr)
688
689/* count trailing zero bits and count # of one bits */
690#if ECB_GCC_VERSION(3,4)
691 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
692 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
693 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
694 #define ecb_ctz32(x) __builtin_ctz (x)
695 #define ecb_ctz64(x) __builtin_ctzll (x)
696 #define ecb_popcount32(x) __builtin_popcount (x)
697 /* no popcountll */
698#else
699 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
700 ecb_function_ int
701 ecb_ctz32 (uint32_t x)
702 {
703 int r = 0;
704
705 x &= ~x + 1; /* this isolates the lowest bit */
706
707#if ECB_branchless_on_i386
708 r += !!(x & 0xaaaaaaaa) << 0;
709 r += !!(x & 0xcccccccc) << 1;
710 r += !!(x & 0xf0f0f0f0) << 2;
711 r += !!(x & 0xff00ff00) << 3;
712 r += !!(x & 0xffff0000) << 4;
713#else
714 if (x & 0xaaaaaaaa) r += 1;
715 if (x & 0xcccccccc) r += 2;
716 if (x & 0xf0f0f0f0) r += 4;
717 if (x & 0xff00ff00) r += 8;
718 if (x & 0xffff0000) r += 16;
719#endif
720
721 return r;
722 }
723
724 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
725 ecb_function_ int
726 ecb_ctz64 (uint64_t x)
727 {
728 int shift = x & 0xffffffffU ? 0 : 32;
729 return ecb_ctz32 (x >> shift) + shift;
730 }
731
732 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
733 ecb_function_ int
734 ecb_popcount32 (uint32_t x)
735 {
736 x -= (x >> 1) & 0x55555555;
737 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
738 x = ((x >> 4) + x) & 0x0f0f0f0f;
739 x *= 0x01010101;
740
741 return x >> 24;
742 }
743
744 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
745 ecb_function_ int ecb_ld32 (uint32_t x)
746 {
747 int r = 0;
748
749 if (x >> 16) { x >>= 16; r += 16; }
750 if (x >> 8) { x >>= 8; r += 8; }
751 if (x >> 4) { x >>= 4; r += 4; }
752 if (x >> 2) { x >>= 2; r += 2; }
753 if (x >> 1) { r += 1; }
754
755 return r;
756 }
757
758 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
759 ecb_function_ int ecb_ld64 (uint64_t x)
760 {
761 int r = 0;
762
763 if (x >> 32) { x >>= 32; r += 32; }
764
765 return r + ecb_ld32 (x);
766 }
767#endif
768
769/* popcount64 is only available on 64 bit cpus as gcc builtin */
770/* so for this version we are lazy */
771ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
772ecb_function_ int
773ecb_popcount64 (uint64_t x)
774{
775 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
776}
777
778ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
779ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
780ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
781ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
782ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
783ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
784ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
785ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
786
787ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
788ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
789ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
790ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
791ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
792ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
793ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
794ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
795
796#if ECB_GCC_VERSION(4,3)
797 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
798 #define ecb_bswap32(x) __builtin_bswap32 (x)
799 #define ecb_bswap64(x) __builtin_bswap64 (x)
800#else
801 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
802 ecb_function_ uint16_t
803 ecb_bswap16 (uint16_t x)
804 {
805 return ecb_rotl16 (x, 8);
806 }
807
808 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
809 ecb_function_ uint32_t
810 ecb_bswap32 (uint32_t x)
811 {
812 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
813 }
814
815 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
816 ecb_function_ uint64_t
817 ecb_bswap64 (uint64_t x)
818 {
819 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
820 }
821#endif
822
823#if ECB_GCC_VERSION(4,5)
824 #define ecb_unreachable() __builtin_unreachable ()
825#else
826 /* this seems to work fine, but gcc always emits a warning for it :/ */
827 ecb_function_ void ecb_unreachable (void) ecb_noreturn;
828 ecb_function_ void ecb_unreachable (void) { }
829#endif
830
831/* try to tell the compiler that some condition is definitely true */
832#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
833
834ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;
835ecb_function_ unsigned char
836ecb_byteorder_helper (void)
837{
838 const uint32_t u = 0x11223344;
839 return *(unsigned char *)&u;
840}
841
842ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;
843ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
844ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;
845ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
846
847#if ECB_GCC_VERSION(3,0) || ECB_C99
848 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
849#else
850 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
851#endif
852
853#if ecb_cplusplus_does_not_suck
854 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
855 template<typename T, int N>
856 static inline int ecb_array_length (const T (&arr)[N])
857 {
858 return N;
859 }
860#else
861 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
862#endif
863
864#endif
865
866/* ECB.H END */
867
868#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
869# undef ECB_MEMORY_FENCE
870# undef ECB_MEMORY_FENCE_ACQUIRE
871# undef ECB_MEMORY_FENCE_RELEASE
872#endif
873
874#define expect_false(cond) ecb_expect_false (cond)
875#define expect_true(cond) ecb_expect_true (cond)
876#define noinline ecb_noinline
877
878#define inline_size ecb_inline
879
880#if EV_FEATURE_CODE
881# define inline_speed ecb_inline
882#else
883# define inline_speed static noinline
884#endif
885
886#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
887
888#if EV_MINPRI == EV_MAXPRI
889# define ABSPRI(w) (((W)w), 0)
890#else
891# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
892#endif
893
894#define EMPTY /* required for microsofts broken pseudo-c compiler */
895#define EMPTY2(a,b) /* used to suppress some warnings */
896
897typedef ev_watcher *W;
898typedef ev_watcher_list *WL;
899typedef ev_watcher_time *WT;
900
901#define ev_active(w) ((W)(w))->active
902#define ev_at(w) ((WT)(w))->at
903
904#if EV_USE_REALTIME
905/* sig_atomic_t is used to avoid per-thread variables or locking but still */
906/* giving it a reasonably high chance of working on typical architectures */
907static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
908#endif
909
910#if EV_USE_MONOTONIC
911static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
912#endif
913
914#ifndef EV_FD_TO_WIN32_HANDLE
915# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
916#endif
917#ifndef EV_WIN32_HANDLE_TO_FD
918# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
919#endif
920#ifndef EV_WIN32_CLOSE_FD
921# define EV_WIN32_CLOSE_FD(fd) close (fd)
922#endif
923
924#ifdef _WIN32
925# include "ev_win32.c"
926#endif
927
928/*****************************************************************************/
929
930/* define a suitable floor function (only used by periodics atm) */
931
932#if EV_USE_FLOOR
933# include <math.h>
934# define ev_floor(v) floor (v)
935#else
936
937#include <float.h>
938
939/* a floor() replacement function, should be independent of ev_tstamp type */
940static ev_tstamp noinline
941ev_floor (ev_tstamp v)
942{
943 /* the choice of shift factor is not terribly important */
944#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
945 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
946#else
947 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
948#endif
949
950 /* argument too large for an unsigned long? */
951 if (expect_false (v >= shift))
952 {
953 ev_tstamp f;
954
955 if (v == v - 1.)
956 return v; /* very large number */
957
958 f = shift * ev_floor (v * (1. / shift));
959 return f + ev_floor (v - f);
960 }
961
962 /* special treatment for negative args? */
963 if (expect_false (v < 0.))
964 {
965 ev_tstamp f = -ev_floor (-v);
966
967 return f - (f == v ? 0 : 1);
968 }
969
970 /* fits into an unsigned long */
971 return (unsigned long)v;
972}
973
974#endif
975
976/*****************************************************************************/
977
978#ifdef __linux
979# include <sys/utsname.h>
980#endif
981
982static unsigned int noinline ecb_cold
983ev_linux_version (void)
984{
985#ifdef __linux
986 unsigned int v = 0;
987 struct utsname buf;
988 int i;
989 char *p = buf.release;
990
991 if (uname (&buf))
992 return 0;
993
994 for (i = 3+1; --i; )
995 {
996 unsigned int c = 0;
997
998 for (;;)
999 {
1000 if (*p >= '0' && *p <= '9')
1001 c = c * 10 + *p++ - '0';
1002 else
1003 {
1004 p += *p == '.';
1005 break;
1006 }
1007 }
1008
1009 v = (v << 8) | c;
1010 }
1011
1012 return v;
1013#else
1014 return 0;
1015#endif
1016}
1017
1018/*****************************************************************************/
1019
1020#if EV_AVOID_STDIO
1021static void noinline ecb_cold
1022ev_printerr (const char *msg)
1023{
1024 write (STDERR_FILENO, msg, strlen (msg));
1025}
1026#endif
1027
1028static void (*syserr_cb)(const char *msg);
1029
1030void ecb_cold
1031ev_set_syserr_cb (void (*cb)(const char *msg))
1032{
1033 syserr_cb = cb;
1034}
1035
1036static void noinline ecb_cold
1037ev_syserr (const char *msg)
1038{
1039 if (!msg)
1040 msg = "(libev) system error";
1041
1042 if (syserr_cb)
1043 syserr_cb (msg);
1044 else
1045 {
1046#if EV_AVOID_STDIO
1047 ev_printerr (msg);
1048 ev_printerr (": ");
1049 ev_printerr (strerror (errno));
1050 ev_printerr ("\n");
1051#else
1052 perror (msg);
1053#endif
1054 abort ();
1055 }
1056}
1057
1058static void *
1059ev_realloc_emul (void *ptr, long size)
1060{
1061#if __GLIBC__
1062 return realloc (ptr, size);
1063#else
1064 /* some systems, notably openbsd and darwin, fail to properly
1065 * implement realloc (x, 0) (as required by both ansi c-89 and
1066 * the single unix specification, so work around them here.
1067 */
1068
1069 if (size)
1070 return realloc (ptr, size);
1071
1072 free (ptr);
1073 return 0;
1074#endif
1075}
1076
1077static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
1078
1079void ecb_cold
1080ev_set_allocator (void *(*cb)(void *ptr, long size))
1081{
1082 alloc = cb;
1083}
1084
1085inline_speed void *
1086ev_realloc (void *ptr, long size)
1087{
1088 ptr = alloc (ptr, size);
1089
1090 if (!ptr && size)
1091 {
1092#if EV_AVOID_STDIO
1093 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1094#else
1095 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1096#endif
1097 abort ();
1098 }
1099
1100 return ptr;
1101}
1102
1103#define ev_malloc(size) ev_realloc (0, (size))
1104#define ev_free(ptr) ev_realloc ((ptr), 0)
1105
1106/*****************************************************************************/
1107
1108/* set in reify when reification needed */
1109#define EV_ANFD_REIFY 1
1110
1111/* file descriptor info structure */
1112typedef struct
1113{
1114 WL head;
1115 unsigned char events; /* the events watched for */
1116 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1117 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
1118 unsigned char unused;
1119#if EV_USE_EPOLL
1120 unsigned int egen; /* generation counter to counter epoll bugs */
1121#endif
1122#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1123 SOCKET handle;
1124#endif
1125#if EV_USE_IOCP
1126 OVERLAPPED or, ow;
1127#endif
1128} ANFD;
1129
1130/* stores the pending event set for a given watcher */
1131typedef struct
1132{
1133 W w;
1134 int events; /* the pending event set for the given watcher */
1135} ANPENDING;
1136
1137#if EV_USE_INOTIFY
1138/* hash table entry per inotify-id */
1139typedef struct
1140{
1141 WL head;
1142} ANFS;
1143#endif
1144
1145/* Heap Entry */
1146#if EV_HEAP_CACHE_AT
1147 /* a heap element */
1148 typedef struct {
1149 ev_tstamp at;
1150 WT w;
1151 } ANHE;
1152
1153 #define ANHE_w(he) (he).w /* access watcher, read-write */
1154 #define ANHE_at(he) (he).at /* access cached at, read-only */
1155 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1156#else
1157 /* a heap element */
1158 typedef WT ANHE;
1159
1160 #define ANHE_w(he) (he)
1161 #define ANHE_at(he) (he)->at
1162 #define ANHE_at_cache(he)
1163#endif
1164
1165#if EV_MULTIPLICITY
1166
1167 struct ev_loop
1168 {
1169 ev_tstamp ev_rt_now;
1170 #define ev_rt_now ((loop)->ev_rt_now)
1171 #define VAR(name,decl) decl;
1172 #include "ev_vars.h"
1173 #undef VAR
1174 };
1175 #include "ev_wrap.h"
1176
1177 static struct ev_loop default_loop_struct;
1178 struct ev_loop *ev_default_loop_ptr;
1179
1180#else
1181
30ev_tstamp ev_now; 1182 ev_tstamp ev_rt_now;
31int ev_method; 1183 #define VAR(name,decl) static decl;
1184 #include "ev_vars.h"
1185 #undef VAR
32 1186
33static int have_monotonic; /* runtime */ 1187 static int ev_default_loop_ptr;
34 1188
35static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 1189#endif
36static void (*method_reify)(void);
37static void (*method_poll)(ev_tstamp timeout);
38 1190
1191#if EV_FEATURE_API
1192# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1193# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1194# define EV_INVOKE_PENDING invoke_cb (EV_A)
1195#else
1196# define EV_RELEASE_CB (void)0
1197# define EV_ACQUIRE_CB (void)0
1198# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1199#endif
1200
1201#define EVBREAK_RECURSE 0x80
1202
1203/*****************************************************************************/
1204
1205#ifndef EV_HAVE_EV_TIME
39ev_tstamp 1206ev_tstamp
40ev_time (void) 1207ev_time (void)
41{ 1208{
42#if HAVE_REALTIME 1209#if EV_USE_REALTIME
1210 if (expect_true (have_realtime))
1211 {
43 struct timespec ts; 1212 struct timespec ts;
44 clock_gettime (CLOCK_REALTIME, &ts); 1213 clock_gettime (CLOCK_REALTIME, &ts);
45 return ts.tv_sec + ts.tv_nsec * 1e-9; 1214 return ts.tv_sec + ts.tv_nsec * 1e-9;
46#else 1215 }
1216#endif
1217
47 struct timeval tv; 1218 struct timeval tv;
48 gettimeofday (&tv, 0); 1219 gettimeofday (&tv, 0);
49 return tv.tv_sec + tv.tv_usec * 1e-6; 1220 return tv.tv_sec + tv.tv_usec * 1e-6;
50#endif
51} 1221}
1222#endif
52 1223
53static ev_tstamp 1224inline_size ev_tstamp
54get_clock (void) 1225get_clock (void)
55{ 1226{
56#if HAVE_MONOTONIC 1227#if EV_USE_MONOTONIC
57 if (have_monotonic) 1228 if (expect_true (have_monotonic))
58 { 1229 {
59 struct timespec ts; 1230 struct timespec ts;
60 clock_gettime (CLOCK_MONOTONIC, &ts); 1231 clock_gettime (CLOCK_MONOTONIC, &ts);
61 return ts.tv_sec + ts.tv_nsec * 1e-9; 1232 return ts.tv_sec + ts.tv_nsec * 1e-9;
62 } 1233 }
63#endif 1234#endif
64 1235
65 return ev_time (); 1236 return ev_time ();
66} 1237}
67 1238
1239#if EV_MULTIPLICITY
1240ev_tstamp
1241ev_now (EV_P)
1242{
1243 return ev_rt_now;
1244}
1245#endif
1246
1247void
1248ev_sleep (ev_tstamp delay)
1249{
1250 if (delay > 0.)
1251 {
1252#if EV_USE_NANOSLEEP
1253 struct timespec ts;
1254
1255 EV_TS_SET (ts, delay);
1256 nanosleep (&ts, 0);
1257#elif defined(_WIN32)
1258 Sleep ((unsigned long)(delay * 1e3));
1259#else
1260 struct timeval tv;
1261
1262 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1263 /* something not guaranteed by newer posix versions, but guaranteed */
1264 /* by older ones */
1265 EV_TV_SET (tv, delay);
1266 select (0, 0, 0, 0, &tv);
1267#endif
1268 }
1269}
1270
1271/*****************************************************************************/
1272
1273#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1274
1275/* find a suitable new size for the given array, */
1276/* hopefully by rounding to a nice-to-malloc size */
1277inline_size int
1278array_nextsize (int elem, int cur, int cnt)
1279{
1280 int ncur = cur + 1;
1281
1282 do
1283 ncur <<= 1;
1284 while (cnt > ncur);
1285
1286 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
1287 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
1288 {
1289 ncur *= elem;
1290 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
1291 ncur = ncur - sizeof (void *) * 4;
1292 ncur /= elem;
1293 }
1294
1295 return ncur;
1296}
1297
1298static void * noinline ecb_cold
1299array_realloc (int elem, void *base, int *cur, int cnt)
1300{
1301 *cur = array_nextsize (elem, *cur, cnt);
1302 return ev_realloc (base, elem * *cur);
1303}
1304
1305#define array_init_zero(base,count) \
1306 memset ((void *)(base), 0, sizeof (*(base)) * (count))
1307
68#define array_needsize(base,cur,cnt,init) \ 1308#define array_needsize(type,base,cur,cnt,init) \
69 if ((cnt) > cur) \ 1309 if (expect_false ((cnt) > (cur))) \
70 { \ 1310 { \
71 int newcnt = cur ? cur << 1 : 16; \ 1311 int ecb_unused ocur_ = (cur); \
72 fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\ 1312 (base) = (type *)array_realloc \
73 base = realloc (base, sizeof (*base) * (newcnt)); \ 1313 (sizeof (type), (base), &(cur), (cnt)); \
74 init (base + cur, newcnt - cur); \ 1314 init ((base) + (ocur_), (cur) - ocur_); \
75 cur = newcnt; \ 1315 }
1316
1317#if 0
1318#define array_slim(type,stem) \
1319 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
1320 { \
1321 stem ## max = array_roundsize (stem ## cnt >> 1); \
1322 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
1323 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
1324 }
1325#endif
1326
1327#define array_free(stem, idx) \
1328 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
1329
1330/*****************************************************************************/
1331
1332/* dummy callback for pending events */
1333static void noinline
1334pendingcb (EV_P_ ev_prepare *w, int revents)
1335{
1336}
1337
1338void noinline
1339ev_feed_event (EV_P_ void *w, int revents)
1340{
1341 W w_ = (W)w;
1342 int pri = ABSPRI (w_);
1343
1344 if (expect_false (w_->pending))
1345 pendings [pri][w_->pending - 1].events |= revents;
1346 else
1347 {
1348 w_->pending = ++pendingcnt [pri];
1349 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1350 pendings [pri][w_->pending - 1].w = w_;
1351 pendings [pri][w_->pending - 1].events = revents;
1352 }
1353}
1354
1355inline_speed void
1356feed_reverse (EV_P_ W w)
1357{
1358 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1359 rfeeds [rfeedcnt++] = w;
1360}
1361
1362inline_size void
1363feed_reverse_done (EV_P_ int revents)
1364{
1365 do
1366 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1367 while (rfeedcnt);
1368}
1369
1370inline_speed void
1371queue_events (EV_P_ W *events, int eventcnt, int type)
1372{
1373 int i;
1374
1375 for (i = 0; i < eventcnt; ++i)
1376 ev_feed_event (EV_A_ events [i], type);
1377}
1378
1379/*****************************************************************************/
1380
1381inline_speed void
1382fd_event_nocheck (EV_P_ int fd, int revents)
1383{
1384 ANFD *anfd = anfds + fd;
1385 ev_io *w;
1386
1387 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1388 {
1389 int ev = w->events & revents;
1390
1391 if (ev)
1392 ev_feed_event (EV_A_ (W)w, ev);
1393 }
1394}
1395
1396/* do not submit kernel events for fds that have reify set */
1397/* because that means they changed while we were polling for new events */
1398inline_speed void
1399fd_event (EV_P_ int fd, int revents)
1400{
1401 ANFD *anfd = anfds + fd;
1402
1403 if (expect_true (!anfd->reify))
1404 fd_event_nocheck (EV_A_ fd, revents);
1405}
1406
1407void
1408ev_feed_fd_event (EV_P_ int fd, int revents)
1409{
1410 if (fd >= 0 && fd < anfdmax)
1411 fd_event_nocheck (EV_A_ fd, revents);
1412}
1413
1414/* make sure the external fd watch events are in-sync */
1415/* with the kernel/libev internal state */
1416inline_size void
1417fd_reify (EV_P)
1418{
1419 int i;
1420
1421#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1422 for (i = 0; i < fdchangecnt; ++i)
1423 {
1424 int fd = fdchanges [i];
1425 ANFD *anfd = anfds + fd;
1426
1427 if (anfd->reify & EV__IOFDSET && anfd->head)
1428 {
1429 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1430
1431 if (handle != anfd->handle)
1432 {
1433 unsigned long arg;
1434
1435 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1436
1437 /* handle changed, but fd didn't - we need to do it in two steps */
1438 backend_modify (EV_A_ fd, anfd->events, 0);
1439 anfd->events = 0;
1440 anfd->handle = handle;
1441 }
1442 }
1443 }
1444#endif
1445
1446 for (i = 0; i < fdchangecnt; ++i)
1447 {
1448 int fd = fdchanges [i];
1449 ANFD *anfd = anfds + fd;
1450 ev_io *w;
1451
1452 unsigned char o_events = anfd->events;
1453 unsigned char o_reify = anfd->reify;
1454
1455 anfd->reify = 0;
1456
1457 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1458 {
1459 anfd->events = 0;
1460
1461 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1462 anfd->events |= (unsigned char)w->events;
1463
1464 if (o_events != anfd->events)
1465 o_reify = EV__IOFDSET; /* actually |= */
1466 }
1467
1468 if (o_reify & EV__IOFDSET)
1469 backend_modify (EV_A_ fd, o_events, anfd->events);
1470 }
1471
1472 fdchangecnt = 0;
1473}
1474
1475/* something about the given fd changed */
1476inline_size void
1477fd_change (EV_P_ int fd, int flags)
1478{
1479 unsigned char reify = anfds [fd].reify;
1480 anfds [fd].reify |= flags;
1481
1482 if (expect_true (!reify))
1483 {
1484 ++fdchangecnt;
1485 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
1486 fdchanges [fdchangecnt - 1] = fd;
1487 }
1488}
1489
1490/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1491inline_speed void ecb_cold
1492fd_kill (EV_P_ int fd)
1493{
1494 ev_io *w;
1495
1496 while ((w = (ev_io *)anfds [fd].head))
1497 {
1498 ev_io_stop (EV_A_ w);
1499 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1500 }
1501}
1502
1503/* check whether the given fd is actually valid, for error recovery */
1504inline_size int ecb_cold
1505fd_valid (int fd)
1506{
1507#ifdef _WIN32
1508 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1509#else
1510 return fcntl (fd, F_GETFD) != -1;
1511#endif
1512}
1513
1514/* called on EBADF to verify fds */
1515static void noinline ecb_cold
1516fd_ebadf (EV_P)
1517{
1518 int fd;
1519
1520 for (fd = 0; fd < anfdmax; ++fd)
1521 if (anfds [fd].events)
1522 if (!fd_valid (fd) && errno == EBADF)
1523 fd_kill (EV_A_ fd);
1524}
1525
1526/* called on ENOMEM in select/poll to kill some fds and retry */
1527static void noinline ecb_cold
1528fd_enomem (EV_P)
1529{
1530 int fd;
1531
1532 for (fd = anfdmax; fd--; )
1533 if (anfds [fd].events)
1534 {
1535 fd_kill (EV_A_ fd);
1536 break;
76 } 1537 }
1538}
77 1539
1540/* usually called after fork if backend needs to re-arm all fds from scratch */
1541static void noinline
1542fd_rearm_all (EV_P)
1543{
1544 int fd;
1545
1546 for (fd = 0; fd < anfdmax; ++fd)
1547 if (anfds [fd].events)
1548 {
1549 anfds [fd].events = 0;
1550 anfds [fd].emask = 0;
1551 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1552 }
1553}
1554
1555/* used to prepare libev internal fd's */
1556/* this is not fork-safe */
1557inline_speed void
1558fd_intern (int fd)
1559{
1560#ifdef _WIN32
1561 unsigned long arg = 1;
1562 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1563#else
1564 fcntl (fd, F_SETFD, FD_CLOEXEC);
1565 fcntl (fd, F_SETFL, O_NONBLOCK);
1566#endif
1567}
1568
1569/*****************************************************************************/
1570
1571/*
1572 * the heap functions want a real array index. array index 0 is guaranteed to not
1573 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1574 * the branching factor of the d-tree.
1575 */
1576
1577/*
1578 * at the moment we allow libev the luxury of two heaps,
1579 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1580 * which is more cache-efficient.
1581 * the difference is about 5% with 50000+ watchers.
1582 */
1583#if EV_USE_4HEAP
1584
1585#define DHEAP 4
1586#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1587#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1588#define UPHEAP_DONE(p,k) ((p) == (k))
1589
1590/* away from the root */
1591inline_speed void
1592downheap (ANHE *heap, int N, int k)
1593{
1594 ANHE he = heap [k];
1595 ANHE *E = heap + N + HEAP0;
1596
1597 for (;;)
1598 {
1599 ev_tstamp minat;
1600 ANHE *minpos;
1601 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1602
1603 /* find minimum child */
1604 if (expect_true (pos + DHEAP - 1 < E))
1605 {
1606 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1607 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1608 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1609 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1610 }
1611 else if (pos < E)
1612 {
1613 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1614 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1615 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1616 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1617 }
1618 else
1619 break;
1620
1621 if (ANHE_at (he) <= minat)
1622 break;
1623
1624 heap [k] = *minpos;
1625 ev_active (ANHE_w (*minpos)) = k;
1626
1627 k = minpos - heap;
1628 }
1629
1630 heap [k] = he;
1631 ev_active (ANHE_w (he)) = k;
1632}
1633
1634#else /* 4HEAP */
1635
1636#define HEAP0 1
1637#define HPARENT(k) ((k) >> 1)
1638#define UPHEAP_DONE(p,k) (!(p))
1639
1640/* away from the root */
1641inline_speed void
1642downheap (ANHE *heap, int N, int k)
1643{
1644 ANHE he = heap [k];
1645
1646 for (;;)
1647 {
1648 int c = k << 1;
1649
1650 if (c >= N + HEAP0)
1651 break;
1652
1653 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1654 ? 1 : 0;
1655
1656 if (ANHE_at (he) <= ANHE_at (heap [c]))
1657 break;
1658
1659 heap [k] = heap [c];
1660 ev_active (ANHE_w (heap [k])) = k;
1661
1662 k = c;
1663 }
1664
1665 heap [k] = he;
1666 ev_active (ANHE_w (he)) = k;
1667}
1668#endif
1669
1670/* towards the root */
1671inline_speed void
1672upheap (ANHE *heap, int k)
1673{
1674 ANHE he = heap [k];
1675
1676 for (;;)
1677 {
1678 int p = HPARENT (k);
1679
1680 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1681 break;
1682
1683 heap [k] = heap [p];
1684 ev_active (ANHE_w (heap [k])) = k;
1685 k = p;
1686 }
1687
1688 heap [k] = he;
1689 ev_active (ANHE_w (he)) = k;
1690}
1691
1692/* move an element suitably so it is in a correct place */
1693inline_size void
1694adjustheap (ANHE *heap, int N, int k)
1695{
1696 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1697 upheap (heap, k);
1698 else
1699 downheap (heap, N, k);
1700}
1701
1702/* rebuild the heap: this function is used only once and executed rarely */
1703inline_size void
1704reheap (ANHE *heap, int N)
1705{
1706 int i;
1707
1708 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1709 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1710 for (i = 0; i < N; ++i)
1711 upheap (heap, i + HEAP0);
1712}
1713
1714/*****************************************************************************/
1715
1716/* associate signal watchers to a signal signal */
78typedef struct 1717typedef struct
79{ 1718{
80 struct ev_io *head; 1719 EV_ATOMIC_T pending;
81 unsigned char wev, rev; /* want, received event set */ 1720#if EV_MULTIPLICITY
82} ANFD; 1721 EV_P;
1722#endif
1723 WL head;
1724} ANSIG;
83 1725
84static ANFD *anfds; 1726static ANSIG signals [EV_NSIG - 1];
85static int anfdmax;
86 1727
87static int *fdchanges; 1728/*****************************************************************************/
88static int fdchangemax, fdchangecnt;
89 1729
1730#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1731
1732static void noinline ecb_cold
1733evpipe_init (EV_P)
1734{
1735 if (!ev_is_active (&pipe_w))
1736 {
1737# if EV_USE_EVENTFD
1738 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1739 if (evfd < 0 && errno == EINVAL)
1740 evfd = eventfd (0, 0);
1741
1742 if (evfd >= 0)
1743 {
1744 evpipe [0] = -1;
1745 fd_intern (evfd); /* doing it twice doesn't hurt */
1746 ev_io_set (&pipe_w, evfd, EV_READ);
1747 }
1748 else
1749# endif
1750 {
1751 while (pipe (evpipe))
1752 ev_syserr ("(libev) error creating signal/async pipe");
1753
1754 fd_intern (evpipe [0]);
1755 fd_intern (evpipe [1]);
1756 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1757 }
1758
1759 ev_io_start (EV_A_ &pipe_w);
1760 ev_unref (EV_A); /* watcher should not keep loop alive */
1761 }
1762}
1763
1764inline_speed void
1765evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1766{
1767 if (expect_true (*flag))
1768 return;
1769
1770 *flag = 1;
1771
1772 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1773
1774 pipe_write_skipped = 1;
1775
1776 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1777
1778 if (pipe_write_wanted)
1779 {
1780 int old_errno;
1781
1782 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1783
1784 old_errno = errno; /* save errno because write will clobber it */
1785
1786#if EV_USE_EVENTFD
1787 if (evfd >= 0)
1788 {
1789 uint64_t counter = 1;
1790 write (evfd, &counter, sizeof (uint64_t));
1791 }
1792 else
1793#endif
1794 {
1795 /* win32 people keep sending patches that change this write() to send() */
1796 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1797 /* so when you think this write should be a send instead, please find out */
1798 /* where your send() is from - it's definitely not the microsoft send, and */
1799 /* tell me. thank you. */
1800 write (evpipe [1], &(evpipe [1]), 1);
1801 }
1802
1803 errno = old_errno;
1804 }
1805}
1806
1807/* called whenever the libev signal pipe */
1808/* got some events (signal, async) */
90static void 1809static void
91anfds_init (ANFD *base, int count) 1810pipecb (EV_P_ ev_io *iow, int revents)
92{ 1811{
93 while (count--) 1812 int i;
94 { 1813
95 base->head = 0; 1814 if (revents & EV_READ)
96 base->wev = base->rev = EV_NONE;
97 ++base;
98 } 1815 {
99} 1816#if EV_USE_EVENTFD
1817 if (evfd >= 0)
1818 {
1819 uint64_t counter;
1820 read (evfd, &counter, sizeof (uint64_t));
1821 }
1822 else
1823#endif
1824 {
1825 char dummy;
1826 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1827 read (evpipe [0], &dummy, 1);
1828 }
1829 }
100 1830
101typedef struct 1831 pipe_write_skipped = 0;
102{
103 struct ev_watcher *w;
104 int events;
105} ANPENDING;
106 1832
107static ANPENDING *pendings; 1833#if EV_SIGNAL_ENABLE
108static int pendingmax, pendingcnt; 1834 if (sig_pending)
1835 {
1836 sig_pending = 0;
1837
1838 for (i = EV_NSIG - 1; i--; )
1839 if (expect_false (signals [i].pending))
1840 ev_feed_signal_event (EV_A_ i + 1);
1841 }
1842#endif
1843
1844#if EV_ASYNC_ENABLE
1845 if (async_pending)
1846 {
1847 async_pending = 0;
1848
1849 for (i = asynccnt; i--; )
1850 if (asyncs [i]->sent)
1851 {
1852 asyncs [i]->sent = 0;
1853 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1854 }
1855 }
1856#endif
1857}
1858
1859/*****************************************************************************/
1860
1861void
1862ev_feed_signal (int signum)
1863{
1864#if EV_MULTIPLICITY
1865 EV_P = signals [signum - 1].loop;
1866
1867 if (!EV_A)
1868 return;
1869#endif
1870
1871 if (!ev_active (&pipe_w))
1872 return;
1873
1874 signals [signum - 1].pending = 1;
1875 evpipe_write (EV_A_ &sig_pending);
1876}
109 1877
110static void 1878static void
111event (struct ev_watcher *w, int events) 1879ev_sighandler (int signum)
112{ 1880{
113 w->pending = ++pendingcnt; 1881#ifdef _WIN32
114 array_needsize (pendings, pendingmax, pendingcnt, ); 1882 signal (signum, ev_sighandler);
115 pendings [pendingcnt - 1].w = w; 1883#endif
116 pendings [pendingcnt - 1].events = events;
117}
118 1884
1885 ev_feed_signal (signum);
1886}
1887
1888void noinline
1889ev_feed_signal_event (EV_P_ int signum)
1890{
1891 WL w;
1892
1893 if (expect_false (signum <= 0 || signum > EV_NSIG))
1894 return;
1895
1896 --signum;
1897
1898#if EV_MULTIPLICITY
1899 /* it is permissible to try to feed a signal to the wrong loop */
1900 /* or, likely more useful, feeding a signal nobody is waiting for */
1901
1902 if (expect_false (signals [signum].loop != EV_A))
1903 return;
1904#endif
1905
1906 signals [signum].pending = 0;
1907
1908 for (w = signals [signum].head; w; w = w->next)
1909 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1910}
1911
1912#if EV_USE_SIGNALFD
119static void 1913static void
120fd_event (int fd, int events) 1914sigfdcb (EV_P_ ev_io *iow, int revents)
121{ 1915{
122 ANFD *anfd = anfds + fd; 1916 struct signalfd_siginfo si[2], *sip; /* these structs are big */
123 struct ev_io *w;
124 1917
125 for (w = anfd->head; w; w = w->next) 1918 for (;;)
126 {
127 int ev = w->events & events;
128
129 if (ev)
130 event ((struct ev_watcher *)w, ev);
131 } 1919 {
132} 1920 ssize_t res = read (sigfd, si, sizeof (si));
133 1921
134static struct ev_timer **timers; 1922 /* not ISO-C, as res might be -1, but works with SuS */
135static int timermax, timercnt; 1923 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1924 ev_feed_signal_event (EV_A_ sip->ssi_signo);
136 1925
1926 if (res < (ssize_t)sizeof (si))
1927 break;
1928 }
1929}
1930#endif
1931
1932#endif
1933
1934/*****************************************************************************/
1935
1936#if EV_CHILD_ENABLE
1937static WL childs [EV_PID_HASHSIZE];
1938
1939static ev_signal childev;
1940
1941#ifndef WIFCONTINUED
1942# define WIFCONTINUED(status) 0
1943#endif
1944
1945/* handle a single child status event */
1946inline_speed void
1947child_reap (EV_P_ int chain, int pid, int status)
1948{
1949 ev_child *w;
1950 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1951
1952 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1953 {
1954 if ((w->pid == pid || !w->pid)
1955 && (!traced || (w->flags & 1)))
1956 {
1957 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1958 w->rpid = pid;
1959 w->rstatus = status;
1960 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1961 }
1962 }
1963}
1964
1965#ifndef WCONTINUED
1966# define WCONTINUED 0
1967#endif
1968
1969/* called on sigchld etc., calls waitpid */
137static void 1970static void
138upheap (int k) 1971childcb (EV_P_ ev_signal *sw, int revents)
139{ 1972{
140 struct ev_timer *w = timers [k]; 1973 int pid, status;
141 1974
142 while (k && timers [k >> 1]->at > w->at) 1975 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
1976 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
1977 if (!WCONTINUED
1978 || errno != EINVAL
1979 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
1980 return;
1981
1982 /* make sure we are called again until all children have been reaped */
1983 /* we need to do it this way so that the callback gets called before we continue */
1984 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1985
1986 child_reap (EV_A_ pid, pid, status);
1987 if ((EV_PID_HASHSIZE) > 1)
1988 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1989}
1990
1991#endif
1992
1993/*****************************************************************************/
1994
1995#if EV_USE_IOCP
1996# include "ev_iocp.c"
1997#endif
1998#if EV_USE_PORT
1999# include "ev_port.c"
2000#endif
2001#if EV_USE_KQUEUE
2002# include "ev_kqueue.c"
2003#endif
2004#if EV_USE_EPOLL
2005# include "ev_epoll.c"
2006#endif
2007#if EV_USE_POLL
2008# include "ev_poll.c"
2009#endif
2010#if EV_USE_SELECT
2011# include "ev_select.c"
2012#endif
2013
2014int ecb_cold
2015ev_version_major (void)
2016{
2017 return EV_VERSION_MAJOR;
2018}
2019
2020int ecb_cold
2021ev_version_minor (void)
2022{
2023 return EV_VERSION_MINOR;
2024}
2025
2026/* return true if we are running with elevated privileges and should ignore env variables */
2027int inline_size ecb_cold
2028enable_secure (void)
2029{
2030#ifdef _WIN32
2031 return 0;
2032#else
2033 return getuid () != geteuid ()
2034 || getgid () != getegid ();
2035#endif
2036}
2037
2038unsigned int ecb_cold
2039ev_supported_backends (void)
2040{
2041 unsigned int flags = 0;
2042
2043 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2044 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
2045 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2046 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2047 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2048
2049 return flags;
2050}
2051
2052unsigned int ecb_cold
2053ev_recommended_backends (void)
2054{
2055 unsigned int flags = ev_supported_backends ();
2056
2057#ifndef __NetBSD__
2058 /* kqueue is borked on everything but netbsd apparently */
2059 /* it usually doesn't work correctly on anything but sockets and pipes */
2060 flags &= ~EVBACKEND_KQUEUE;
2061#endif
2062#ifdef __APPLE__
2063 /* only select works correctly on that "unix-certified" platform */
2064 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2065 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2066#endif
2067#ifdef __FreeBSD__
2068 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2069#endif
2070
2071 return flags;
2072}
2073
2074unsigned int ecb_cold
2075ev_embeddable_backends (void)
2076{
2077 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2078
2079 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2080 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2081 flags &= ~EVBACKEND_EPOLL;
2082
2083 return flags;
2084}
2085
2086unsigned int
2087ev_backend (EV_P)
2088{
2089 return backend;
2090}
2091
2092#if EV_FEATURE_API
2093unsigned int
2094ev_iteration (EV_P)
2095{
2096 return loop_count;
2097}
2098
2099unsigned int
2100ev_depth (EV_P)
2101{
2102 return loop_depth;
2103}
2104
2105void
2106ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
2107{
2108 io_blocktime = interval;
2109}
2110
2111void
2112ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
2113{
2114 timeout_blocktime = interval;
2115}
2116
2117void
2118ev_set_userdata (EV_P_ void *data)
2119{
2120 userdata = data;
2121}
2122
2123void *
2124ev_userdata (EV_P)
2125{
2126 return userdata;
2127}
2128
2129void
2130ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
2131{
2132 invoke_cb = invoke_pending_cb;
2133}
2134
2135void
2136ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
2137{
2138 release_cb = release;
2139 acquire_cb = acquire;
2140}
2141#endif
2142
2143/* initialise a loop structure, must be zero-initialised */
2144static void noinline ecb_cold
2145loop_init (EV_P_ unsigned int flags)
2146{
2147 if (!backend)
2148 {
2149 origflags = flags;
2150
2151#if EV_USE_REALTIME
2152 if (!have_realtime)
2153 {
2154 struct timespec ts;
2155
2156 if (!clock_gettime (CLOCK_REALTIME, &ts))
2157 have_realtime = 1;
2158 }
2159#endif
2160
2161#if EV_USE_MONOTONIC
2162 if (!have_monotonic)
2163 {
2164 struct timespec ts;
2165
2166 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
2167 have_monotonic = 1;
2168 }
2169#endif
2170
2171 /* pid check not overridable via env */
2172#ifndef _WIN32
2173 if (flags & EVFLAG_FORKCHECK)
2174 curpid = getpid ();
2175#endif
2176
2177 if (!(flags & EVFLAG_NOENV)
2178 && !enable_secure ()
2179 && getenv ("LIBEV_FLAGS"))
2180 flags = atoi (getenv ("LIBEV_FLAGS"));
2181
2182 ev_rt_now = ev_time ();
2183 mn_now = get_clock ();
2184 now_floor = mn_now;
2185 rtmn_diff = ev_rt_now - mn_now;
2186#if EV_FEATURE_API
2187 invoke_cb = ev_invoke_pending;
2188#endif
2189
2190 io_blocktime = 0.;
2191 timeout_blocktime = 0.;
2192 backend = 0;
2193 backend_fd = -1;
2194 sig_pending = 0;
2195#if EV_ASYNC_ENABLE
2196 async_pending = 0;
2197#endif
2198 pipe_write_skipped = 0;
2199 pipe_write_wanted = 0;
2200#if EV_USE_INOTIFY
2201 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2202#endif
2203#if EV_USE_SIGNALFD
2204 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2205#endif
2206
2207 if (!(flags & EVBACKEND_MASK))
2208 flags |= ev_recommended_backends ();
2209
2210#if EV_USE_IOCP
2211 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2212#endif
2213#if EV_USE_PORT
2214 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
2215#endif
2216#if EV_USE_KQUEUE
2217 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
2218#endif
2219#if EV_USE_EPOLL
2220 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
2221#endif
2222#if EV_USE_POLL
2223 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
2224#endif
2225#if EV_USE_SELECT
2226 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
2227#endif
2228
2229 ev_prepare_init (&pending_w, pendingcb);
2230
2231#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2232 ev_init (&pipe_w, pipecb);
2233 ev_set_priority (&pipe_w, EV_MAXPRI);
2234#endif
2235 }
2236}
2237
2238/* free up a loop structure */
2239void ecb_cold
2240ev_loop_destroy (EV_P)
2241{
2242 int i;
2243
2244#if EV_MULTIPLICITY
2245 /* mimic free (0) */
2246 if (!EV_A)
2247 return;
2248#endif
2249
2250#if EV_CLEANUP_ENABLE
2251 /* queue cleanup watchers (and execute them) */
2252 if (expect_false (cleanupcnt))
2253 {
2254 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2255 EV_INVOKE_PENDING;
2256 }
2257#endif
2258
2259#if EV_CHILD_ENABLE
2260 if (ev_is_active (&childev))
2261 {
2262 ev_ref (EV_A); /* child watcher */
2263 ev_signal_stop (EV_A_ &childev);
2264 }
2265#endif
2266
2267 if (ev_is_active (&pipe_w))
2268 {
2269 /*ev_ref (EV_A);*/
2270 /*ev_io_stop (EV_A_ &pipe_w);*/
2271
2272#if EV_USE_EVENTFD
2273 if (evfd >= 0)
2274 close (evfd);
2275#endif
2276
2277 if (evpipe [0] >= 0)
2278 {
2279 EV_WIN32_CLOSE_FD (evpipe [0]);
2280 EV_WIN32_CLOSE_FD (evpipe [1]);
2281 }
2282 }
2283
2284#if EV_USE_SIGNALFD
2285 if (ev_is_active (&sigfd_w))
2286 close (sigfd);
2287#endif
2288
2289#if EV_USE_INOTIFY
2290 if (fs_fd >= 0)
2291 close (fs_fd);
2292#endif
2293
2294 if (backend_fd >= 0)
2295 close (backend_fd);
2296
2297#if EV_USE_IOCP
2298 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2299#endif
2300#if EV_USE_PORT
2301 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
2302#endif
2303#if EV_USE_KQUEUE
2304 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
2305#endif
2306#if EV_USE_EPOLL
2307 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
2308#endif
2309#if EV_USE_POLL
2310 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
2311#endif
2312#if EV_USE_SELECT
2313 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
2314#endif
2315
2316 for (i = NUMPRI; i--; )
2317 {
2318 array_free (pending, [i]);
2319#if EV_IDLE_ENABLE
2320 array_free (idle, [i]);
2321#endif
2322 }
2323
2324 ev_free (anfds); anfds = 0; anfdmax = 0;
2325
2326 /* have to use the microsoft-never-gets-it-right macro */
2327 array_free (rfeed, EMPTY);
2328 array_free (fdchange, EMPTY);
2329 array_free (timer, EMPTY);
2330#if EV_PERIODIC_ENABLE
2331 array_free (periodic, EMPTY);
2332#endif
2333#if EV_FORK_ENABLE
2334 array_free (fork, EMPTY);
2335#endif
2336#if EV_CLEANUP_ENABLE
2337 array_free (cleanup, EMPTY);
2338#endif
2339 array_free (prepare, EMPTY);
2340 array_free (check, EMPTY);
2341#if EV_ASYNC_ENABLE
2342 array_free (async, EMPTY);
2343#endif
2344
2345 backend = 0;
2346
2347#if EV_MULTIPLICITY
2348 if (ev_is_default_loop (EV_A))
2349#endif
2350 ev_default_loop_ptr = 0;
2351#if EV_MULTIPLICITY
2352 else
2353 ev_free (EV_A);
2354#endif
2355}
2356
2357#if EV_USE_INOTIFY
2358inline_size void infy_fork (EV_P);
2359#endif
2360
2361inline_size void
2362loop_fork (EV_P)
2363{
2364#if EV_USE_PORT
2365 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2366#endif
2367#if EV_USE_KQUEUE
2368 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
2369#endif
2370#if EV_USE_EPOLL
2371 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
2372#endif
2373#if EV_USE_INOTIFY
2374 infy_fork (EV_A);
2375#endif
2376
2377 if (ev_is_active (&pipe_w))
2378 {
2379 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2380
2381 ev_ref (EV_A);
2382 ev_io_stop (EV_A_ &pipe_w);
2383
2384#if EV_USE_EVENTFD
2385 if (evfd >= 0)
2386 close (evfd);
2387#endif
2388
2389 if (evpipe [0] >= 0)
2390 {
2391 EV_WIN32_CLOSE_FD (evpipe [0]);
2392 EV_WIN32_CLOSE_FD (evpipe [1]);
2393 }
2394
2395#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2396 evpipe_init (EV_A);
2397 /* now iterate over everything, in case we missed something */
2398 pipecb (EV_A_ &pipe_w, EV_READ);
2399#endif
2400 }
2401
2402 postfork = 0;
2403}
2404
2405#if EV_MULTIPLICITY
2406
2407struct ev_loop * ecb_cold
2408ev_loop_new (unsigned int flags)
2409{
2410 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2411
2412 memset (EV_A, 0, sizeof (struct ev_loop));
2413 loop_init (EV_A_ flags);
2414
2415 if (ev_backend (EV_A))
2416 return EV_A;
2417
2418 ev_free (EV_A);
2419 return 0;
2420}
2421
2422#endif /* multiplicity */
2423
2424#if EV_VERIFY
2425static void noinline ecb_cold
2426verify_watcher (EV_P_ W w)
2427{
2428 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2429
2430 if (w->pending)
2431 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2432}
2433
2434static void noinline ecb_cold
2435verify_heap (EV_P_ ANHE *heap, int N)
2436{
2437 int i;
2438
2439 for (i = HEAP0; i < N + HEAP0; ++i)
2440 {
2441 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2442 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2443 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2444
2445 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2446 }
2447}
2448
2449static void noinline ecb_cold
2450array_verify (EV_P_ W *ws, int cnt)
2451{
2452 while (cnt--)
2453 {
2454 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2455 verify_watcher (EV_A_ ws [cnt]);
2456 }
2457}
2458#endif
2459
2460#if EV_FEATURE_API
2461void ecb_cold
2462ev_verify (EV_P)
2463{
2464#if EV_VERIFY
2465 int i;
2466 WL w;
2467
2468 assert (activecnt >= -1);
2469
2470 assert (fdchangemax >= fdchangecnt);
2471 for (i = 0; i < fdchangecnt; ++i)
2472 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2473
2474 assert (anfdmax >= 0);
2475 for (i = 0; i < anfdmax; ++i)
2476 for (w = anfds [i].head; w; w = w->next)
143 { 2477 {
144 timers [k] = timers [k >> 1]; 2478 verify_watcher (EV_A_ (W)w);
145 timers [k]->active = k + 1; 2479 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
146 k >>= 1; 2480 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
147 } 2481 }
148 2482
149 timers [k] = w; 2483 assert (timermax >= timercnt);
150 timers [k]->active = k + 1; 2484 verify_heap (EV_A_ timers, timercnt);
151 2485
152} 2486#if EV_PERIODIC_ENABLE
2487 assert (periodicmax >= periodiccnt);
2488 verify_heap (EV_A_ periodics, periodiccnt);
2489#endif
153 2490
154static void 2491 for (i = NUMPRI; i--; )
155downheap (int k) 2492 {
156{ 2493 assert (pendingmax [i] >= pendingcnt [i]);
157 struct ev_timer *w = timers [k]; 2494#if EV_IDLE_ENABLE
2495 assert (idleall >= 0);
2496 assert (idlemax [i] >= idlecnt [i]);
2497 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2498#endif
2499 }
158 2500
159 while (k < (timercnt >> 1)) 2501#if EV_FORK_ENABLE
2502 assert (forkmax >= forkcnt);
2503 array_verify (EV_A_ (W *)forks, forkcnt);
2504#endif
2505
2506#if EV_CLEANUP_ENABLE
2507 assert (cleanupmax >= cleanupcnt);
2508 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2509#endif
2510
2511#if EV_ASYNC_ENABLE
2512 assert (asyncmax >= asynccnt);
2513 array_verify (EV_A_ (W *)asyncs, asynccnt);
2514#endif
2515
2516#if EV_PREPARE_ENABLE
2517 assert (preparemax >= preparecnt);
2518 array_verify (EV_A_ (W *)prepares, preparecnt);
2519#endif
2520
2521#if EV_CHECK_ENABLE
2522 assert (checkmax >= checkcnt);
2523 array_verify (EV_A_ (W *)checks, checkcnt);
2524#endif
2525
2526# if 0
2527#if EV_CHILD_ENABLE
2528 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2529 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2530#endif
2531# endif
2532#endif
2533}
2534#endif
2535
2536#if EV_MULTIPLICITY
2537struct ev_loop * ecb_cold
2538#else
2539int
2540#endif
2541ev_default_loop (unsigned int flags)
2542{
2543 if (!ev_default_loop_ptr)
2544 {
2545#if EV_MULTIPLICITY
2546 EV_P = ev_default_loop_ptr = &default_loop_struct;
2547#else
2548 ev_default_loop_ptr = 1;
2549#endif
2550
2551 loop_init (EV_A_ flags);
2552
2553 if (ev_backend (EV_A))
2554 {
2555#if EV_CHILD_ENABLE
2556 ev_signal_init (&childev, childcb, SIGCHLD);
2557 ev_set_priority (&childev, EV_MAXPRI);
2558 ev_signal_start (EV_A_ &childev);
2559 ev_unref (EV_A); /* child watcher should not keep loop alive */
2560#endif
2561 }
2562 else
2563 ev_default_loop_ptr = 0;
2564 }
2565
2566 return ev_default_loop_ptr;
2567}
2568
2569void
2570ev_loop_fork (EV_P)
2571{
2572 postfork = 1; /* must be in line with ev_default_fork */
2573}
2574
2575/*****************************************************************************/
2576
2577void
2578ev_invoke (EV_P_ void *w, int revents)
2579{
2580 EV_CB_INVOKE ((W)w, revents);
2581}
2582
2583unsigned int
2584ev_pending_count (EV_P)
2585{
2586 int pri;
2587 unsigned int count = 0;
2588
2589 for (pri = NUMPRI; pri--; )
2590 count += pendingcnt [pri];
2591
2592 return count;
2593}
2594
2595void noinline
2596ev_invoke_pending (EV_P)
2597{
2598 int pri;
2599
2600 for (pri = NUMPRI; pri--; )
2601 while (pendingcnt [pri])
160 { 2602 {
161 int j = k << 1; 2603 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
162 2604
163 if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at) 2605 p->w->pending = 0;
2606 EV_CB_INVOKE (p->w, p->events);
2607 EV_FREQUENT_CHECK;
2608 }
2609}
2610
2611#if EV_IDLE_ENABLE
2612/* make idle watchers pending. this handles the "call-idle */
2613/* only when higher priorities are idle" logic */
2614inline_size void
2615idle_reify (EV_P)
2616{
2617 if (expect_false (idleall))
2618 {
2619 int pri;
2620
2621 for (pri = NUMPRI; pri--; )
164 ++j; 2622 {
2623 if (pendingcnt [pri])
2624 break;
165 2625
166 if (w->at <= timers [j]->at) 2626 if (idlecnt [pri])
2627 {
2628 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2629 break;
2630 }
2631 }
2632 }
2633}
2634#endif
2635
2636/* make timers pending */
2637inline_size void
2638timers_reify (EV_P)
2639{
2640 EV_FREQUENT_CHECK;
2641
2642 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2643 {
2644 do
2645 {
2646 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2647
2648 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2649
2650 /* first reschedule or stop timer */
2651 if (w->repeat)
2652 {
2653 ev_at (w) += w->repeat;
2654 if (ev_at (w) < mn_now)
2655 ev_at (w) = mn_now;
2656
2657 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2658
2659 ANHE_at_cache (timers [HEAP0]);
2660 downheap (timers, timercnt, HEAP0);
2661 }
2662 else
2663 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2664
2665 EV_FREQUENT_CHECK;
2666 feed_reverse (EV_A_ (W)w);
2667 }
2668 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2669
2670 feed_reverse_done (EV_A_ EV_TIMER);
2671 }
2672}
2673
2674#if EV_PERIODIC_ENABLE
2675
2676static void noinline
2677periodic_recalc (EV_P_ ev_periodic *w)
2678{
2679 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2680 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2681
2682 /* the above almost always errs on the low side */
2683 while (at <= ev_rt_now)
2684 {
2685 ev_tstamp nat = at + w->interval;
2686
2687 /* when resolution fails us, we use ev_rt_now */
2688 if (expect_false (nat == at))
2689 {
2690 at = ev_rt_now;
2691 break;
2692 }
2693
2694 at = nat;
2695 }
2696
2697 ev_at (w) = at;
2698}
2699
2700/* make periodics pending */
2701inline_size void
2702periodics_reify (EV_P)
2703{
2704 EV_FREQUENT_CHECK;
2705
2706 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2707 {
2708 int feed_count = 0;
2709
2710 do
2711 {
2712 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2713
2714 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2715
2716 /* first reschedule or stop timer */
2717 if (w->reschedule_cb)
2718 {
2719 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2720
2721 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2722
2723 ANHE_at_cache (periodics [HEAP0]);
2724 downheap (periodics, periodiccnt, HEAP0);
2725 }
2726 else if (w->interval)
2727 {
2728 periodic_recalc (EV_A_ w);
2729 ANHE_at_cache (periodics [HEAP0]);
2730 downheap (periodics, periodiccnt, HEAP0);
2731 }
2732 else
2733 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2734
2735 EV_FREQUENT_CHECK;
2736 feed_reverse (EV_A_ (W)w);
2737 }
2738 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2739
2740 feed_reverse_done (EV_A_ EV_PERIODIC);
2741 }
2742}
2743
2744/* simply recalculate all periodics */
2745/* TODO: maybe ensure that at least one event happens when jumping forward? */
2746static void noinline ecb_cold
2747periodics_reschedule (EV_P)
2748{
2749 int i;
2750
2751 /* adjust periodics after time jump */
2752 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2753 {
2754 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2755
2756 if (w->reschedule_cb)
2757 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2758 else if (w->interval)
2759 periodic_recalc (EV_A_ w);
2760
2761 ANHE_at_cache (periodics [i]);
2762 }
2763
2764 reheap (periodics, periodiccnt);
2765}
2766#endif
2767
2768/* adjust all timers by a given offset */
2769static void noinline ecb_cold
2770timers_reschedule (EV_P_ ev_tstamp adjust)
2771{
2772 int i;
2773
2774 for (i = 0; i < timercnt; ++i)
2775 {
2776 ANHE *he = timers + i + HEAP0;
2777 ANHE_w (*he)->at += adjust;
2778 ANHE_at_cache (*he);
2779 }
2780}
2781
2782/* fetch new monotonic and realtime times from the kernel */
2783/* also detect if there was a timejump, and act accordingly */
2784inline_speed void
2785time_update (EV_P_ ev_tstamp max_block)
2786{
2787#if EV_USE_MONOTONIC
2788 if (expect_true (have_monotonic))
2789 {
2790 int i;
2791 ev_tstamp odiff = rtmn_diff;
2792
2793 mn_now = get_clock ();
2794
2795 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2796 /* interpolate in the meantime */
2797 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2798 {
2799 ev_rt_now = rtmn_diff + mn_now;
2800 return;
2801 }
2802
2803 now_floor = mn_now;
2804 ev_rt_now = ev_time ();
2805
2806 /* loop a few times, before making important decisions.
2807 * on the choice of "4": one iteration isn't enough,
2808 * in case we get preempted during the calls to
2809 * ev_time and get_clock. a second call is almost guaranteed
2810 * to succeed in that case, though. and looping a few more times
2811 * doesn't hurt either as we only do this on time-jumps or
2812 * in the unlikely event of having been preempted here.
2813 */
2814 for (i = 4; --i; )
2815 {
2816 ev_tstamp diff;
2817 rtmn_diff = ev_rt_now - mn_now;
2818
2819 diff = odiff - rtmn_diff;
2820
2821 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2822 return; /* all is well */
2823
2824 ev_rt_now = ev_time ();
2825 mn_now = get_clock ();
2826 now_floor = mn_now;
2827 }
2828
2829 /* no timer adjustment, as the monotonic clock doesn't jump */
2830 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2831# if EV_PERIODIC_ENABLE
2832 periodics_reschedule (EV_A);
2833# endif
2834 }
2835 else
2836#endif
2837 {
2838 ev_rt_now = ev_time ();
2839
2840 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2841 {
2842 /* adjust timers. this is easy, as the offset is the same for all of them */
2843 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2844#if EV_PERIODIC_ENABLE
2845 periodics_reschedule (EV_A);
2846#endif
2847 }
2848
2849 mn_now = ev_rt_now;
2850 }
2851}
2852
2853void
2854ev_run (EV_P_ int flags)
2855{
2856#if EV_FEATURE_API
2857 ++loop_depth;
2858#endif
2859
2860 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2861
2862 loop_done = EVBREAK_CANCEL;
2863
2864 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2865
2866 do
2867 {
2868#if EV_VERIFY >= 2
2869 ev_verify (EV_A);
2870#endif
2871
2872#ifndef _WIN32
2873 if (expect_false (curpid)) /* penalise the forking check even more */
2874 if (expect_false (getpid () != curpid))
2875 {
2876 curpid = getpid ();
2877 postfork = 1;
2878 }
2879#endif
2880
2881#if EV_FORK_ENABLE
2882 /* we might have forked, so queue fork handlers */
2883 if (expect_false (postfork))
2884 if (forkcnt)
2885 {
2886 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2887 EV_INVOKE_PENDING;
2888 }
2889#endif
2890
2891#if EV_PREPARE_ENABLE
2892 /* queue prepare watchers (and execute them) */
2893 if (expect_false (preparecnt))
2894 {
2895 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2896 EV_INVOKE_PENDING;
2897 }
2898#endif
2899
2900 if (expect_false (loop_done))
167 break; 2901 break;
168 2902
169 timers [k] = timers [j]; 2903 /* we might have forked, so reify kernel state if necessary */
170 timers [k]->active = k + 1; 2904 if (expect_false (postfork))
171 k = j; 2905 loop_fork (EV_A);
2906
2907 /* update fd-related kernel structures */
2908 fd_reify (EV_A);
2909
2910 /* calculate blocking time */
2911 {
2912 ev_tstamp waittime = 0.;
2913 ev_tstamp sleeptime = 0.;
2914
2915 /* remember old timestamp for io_blocktime calculation */
2916 ev_tstamp prev_mn_now = mn_now;
2917
2918 /* update time to cancel out callback processing overhead */
2919 time_update (EV_A_ 1e100);
2920
2921 /* from now on, we want a pipe-wake-up */
2922 pipe_write_wanted = 1;
2923
2924 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
2925
2926 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2927 {
2928 waittime = MAX_BLOCKTIME;
2929
2930 if (timercnt)
2931 {
2932 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2933 if (waittime > to) waittime = to;
2934 }
2935
2936#if EV_PERIODIC_ENABLE
2937 if (periodiccnt)
2938 {
2939 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2940 if (waittime > to) waittime = to;
2941 }
2942#endif
2943
2944 /* don't let timeouts decrease the waittime below timeout_blocktime */
2945 if (expect_false (waittime < timeout_blocktime))
2946 waittime = timeout_blocktime;
2947
2948 /* at this point, we NEED to wait, so we have to ensure */
2949 /* to pass a minimum nonzero value to the backend */
2950 if (expect_false (waittime < backend_mintime))
2951 waittime = backend_mintime;
2952
2953 /* extra check because io_blocktime is commonly 0 */
2954 if (expect_false (io_blocktime))
2955 {
2956 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2957
2958 if (sleeptime > waittime - backend_mintime)
2959 sleeptime = waittime - backend_mintime;
2960
2961 if (expect_true (sleeptime > 0.))
2962 {
2963 ev_sleep (sleeptime);
2964 waittime -= sleeptime;
2965 }
2966 }
2967 }
2968
2969#if EV_FEATURE_API
2970 ++loop_count;
2971#endif
2972 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2973 backend_poll (EV_A_ waittime);
2974 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2975
2976 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
2977
2978 if (pipe_write_skipped)
2979 {
2980 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2981 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2982 }
2983
2984
2985 /* update ev_rt_now, do magic */
2986 time_update (EV_A_ waittime + sleeptime);
172 } 2987 }
173 2988
174 timers [k] = w; 2989 /* queue pending timers and reschedule them */
175 timers [k]->active = k + 1; 2990 timers_reify (EV_A); /* relative timers called last */
176} 2991#if EV_PERIODIC_ENABLE
177 2992 periodics_reify (EV_A); /* absolute timers called first */
178static struct ev_signal **signals;
179static int signalmax, signalcnt;
180
181static void
182signals_init (struct ev_signal **base, int count)
183{
184 while (count--)
185 *base++ = 0;
186}
187
188#if HAVE_EPOLL
189# include "ev_epoll.c"
190#endif 2993#endif
191#if HAVE_SELECT
192# include "ev_select.c"
193#endif
194 2994
195int ev_init (int flags) 2995#if EV_IDLE_ENABLE
2996 /* queue idle watchers unless other events are pending */
2997 idle_reify (EV_A);
2998#endif
2999
3000#if EV_CHECK_ENABLE
3001 /* queue check watchers, to be executed first */
3002 if (expect_false (checkcnt))
3003 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3004#endif
3005
3006 EV_INVOKE_PENDING;
3007 }
3008 while (expect_true (
3009 activecnt
3010 && !loop_done
3011 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3012 ));
3013
3014 if (loop_done == EVBREAK_ONE)
3015 loop_done = EVBREAK_CANCEL;
3016
3017#if EV_FEATURE_API
3018 --loop_depth;
3019#endif
3020}
3021
3022void
3023ev_break (EV_P_ int how)
196{ 3024{
197#if HAVE_MONOTONIC 3025 loop_done = how;
3026}
3027
3028void
3029ev_ref (EV_P)
3030{
3031 ++activecnt;
3032}
3033
3034void
3035ev_unref (EV_P)
3036{
3037 --activecnt;
3038}
3039
3040void
3041ev_now_update (EV_P)
3042{
3043 time_update (EV_A_ 1e100);
3044}
3045
3046void
3047ev_suspend (EV_P)
3048{
3049 ev_now_update (EV_A);
3050}
3051
3052void
3053ev_resume (EV_P)
3054{
3055 ev_tstamp mn_prev = mn_now;
3056
3057 ev_now_update (EV_A);
3058 timers_reschedule (EV_A_ mn_now - mn_prev);
3059#if EV_PERIODIC_ENABLE
3060 /* TODO: really do this? */
3061 periodics_reschedule (EV_A);
3062#endif
3063}
3064
3065/*****************************************************************************/
3066/* singly-linked list management, used when the expected list length is short */
3067
3068inline_size void
3069wlist_add (WL *head, WL elem)
3070{
3071 elem->next = *head;
3072 *head = elem;
3073}
3074
3075inline_size void
3076wlist_del (WL *head, WL elem)
3077{
3078 while (*head)
3079 {
3080 if (expect_true (*head == elem))
3081 {
3082 *head = elem->next;
3083 break;
3084 }
3085
3086 head = &(*head)->next;
3087 }
3088}
3089
3090/* internal, faster, version of ev_clear_pending */
3091inline_speed void
3092clear_pending (EV_P_ W w)
3093{
3094 if (w->pending)
3095 {
3096 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
3097 w->pending = 0;
3098 }
3099}
3100
3101int
3102ev_clear_pending (EV_P_ void *w)
3103{
3104 W w_ = (W)w;
3105 int pending = w_->pending;
3106
3107 if (expect_true (pending))
3108 {
3109 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3110 p->w = (W)&pending_w;
3111 w_->pending = 0;
3112 return p->events;
3113 }
3114 else
3115 return 0;
3116}
3117
3118inline_size void
3119pri_adjust (EV_P_ W w)
3120{
3121 int pri = ev_priority (w);
3122 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3123 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3124 ev_set_priority (w, pri);
3125}
3126
3127inline_speed void
3128ev_start (EV_P_ W w, int active)
3129{
3130 pri_adjust (EV_A_ w);
3131 w->active = active;
3132 ev_ref (EV_A);
3133}
3134
3135inline_size void
3136ev_stop (EV_P_ W w)
3137{
3138 ev_unref (EV_A);
3139 w->active = 0;
3140}
3141
3142/*****************************************************************************/
3143
3144void noinline
3145ev_io_start (EV_P_ ev_io *w)
3146{
3147 int fd = w->fd;
3148
3149 if (expect_false (ev_is_active (w)))
3150 return;
3151
3152 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3153 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3154
3155 EV_FREQUENT_CHECK;
3156
3157 ev_start (EV_A_ (W)w, 1);
3158 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
3159 wlist_add (&anfds[fd].head, (WL)w);
3160
3161 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3162 w->events &= ~EV__IOFDSET;
3163
3164 EV_FREQUENT_CHECK;
3165}
3166
3167void noinline
3168ev_io_stop (EV_P_ ev_io *w)
3169{
3170 clear_pending (EV_A_ (W)w);
3171 if (expect_false (!ev_is_active (w)))
3172 return;
3173
3174 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3175
3176 EV_FREQUENT_CHECK;
3177
3178 wlist_del (&anfds[w->fd].head, (WL)w);
3179 ev_stop (EV_A_ (W)w);
3180
3181 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3182
3183 EV_FREQUENT_CHECK;
3184}
3185
3186void noinline
3187ev_timer_start (EV_P_ ev_timer *w)
3188{
3189 if (expect_false (ev_is_active (w)))
3190 return;
3191
3192 ev_at (w) += mn_now;
3193
3194 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
3195
3196 EV_FREQUENT_CHECK;
3197
3198 ++timercnt;
3199 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
3200 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
3201 ANHE_w (timers [ev_active (w)]) = (WT)w;
3202 ANHE_at_cache (timers [ev_active (w)]);
3203 upheap (timers, ev_active (w));
3204
3205 EV_FREQUENT_CHECK;
3206
3207 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
3208}
3209
3210void noinline
3211ev_timer_stop (EV_P_ ev_timer *w)
3212{
3213 clear_pending (EV_A_ (W)w);
3214 if (expect_false (!ev_is_active (w)))
3215 return;
3216
3217 EV_FREQUENT_CHECK;
3218
198 { 3219 {
199 struct timespec ts; 3220 int active = ev_active (w);
200 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 3221
201 have_monotonic = 1; 3222 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3223
3224 --timercnt;
3225
3226 if (expect_true (active < timercnt + HEAP0))
3227 {
3228 timers [active] = timers [timercnt + HEAP0];
3229 adjustheap (timers, timercnt, active);
3230 }
202 } 3231 }
203#endif
204 3232
205 ev_now = ev_time (); 3233 ev_at (w) -= mn_now;
206 3234
207#if HAVE_EPOLL 3235 ev_stop (EV_A_ (W)w);
208 if (epoll_init (flags))
209 return ev_method;
210#endif
211#if HAVE_SELECT
212 if (select_init (flags))
213 return ev_method;
214#endif
215 3236
216 ev_method = EVMETHOD_NONE; 3237 EV_FREQUENT_CHECK;
217 return ev_method;
218} 3238}
219 3239
220void ev_prefork (void) 3240void noinline
3241ev_timer_again (EV_P_ ev_timer *w)
221{ 3242{
222} 3243 EV_FREQUENT_CHECK;
223 3244
224void ev_postfork_parent (void) 3245 if (ev_is_active (w))
225{
226}
227
228void ev_postfork_child (void)
229{
230#if HAVE_EPOLL
231 epoll_postfork_child ();
232#endif
233}
234
235static void
236call_pending ()
237{
238 int i;
239
240 for (i = 0; i < pendingcnt; ++i)
241 {
242 ANPENDING *p = pendings + i;
243
244 if (p->w)
245 {
246 p->w->pending = 0;
247 p->w->cb (p->w, p->events);
248 }
249 } 3246 {
250
251 pendingcnt = 0;
252}
253
254static void
255timer_reify (void)
256{
257 while (timercnt && timers [0]->at <= ev_now)
258 {
259 struct ev_timer *w = timers [0];
260
261 /* first reschedule timer */
262 if (w->repeat) 3247 if (w->repeat)
263 { 3248 {
264 if (w->is_abs)
265 w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
266 else
267 w->at = ev_now + w->repeat; 3249 ev_at (w) = mn_now + w->repeat;
268 3250 ANHE_at_cache (timers [ev_active (w)]);
269 downheap (0); 3251 adjustheap (timers, timercnt, ev_active (w));
270 } 3252 }
271 else 3253 else
272 evtimer_stop (w); /* nonrepeating: stop timer */ 3254 ev_timer_stop (EV_A_ w);
273 3255 }
274 event ((struct ev_watcher *)w, EV_TIMEOUT); 3256 else if (w->repeat)
275 } 3257 {
276} 3258 ev_at (w) = w->repeat;
3259 ev_timer_start (EV_A_ w);
3260 }
277 3261
278int ev_loop_done; 3262 EV_FREQUENT_CHECK;
3263}
279 3264
280int ev_loop (int flags) 3265ev_tstamp
3266ev_timer_remaining (EV_P_ ev_timer *w)
281{ 3267{
282 double block; 3268 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
283 ev_loop_done = flags & EVLOOP_ONESHOT; 3269}
284 3270
285 do 3271#if EV_PERIODIC_ENABLE
3272void noinline
3273ev_periodic_start (EV_P_ ev_periodic *w)
3274{
3275 if (expect_false (ev_is_active (w)))
3276 return;
3277
3278 if (w->reschedule_cb)
3279 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3280 else if (w->interval)
3281 {
3282 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
3283 periodic_recalc (EV_A_ w);
3284 }
3285 else
3286 ev_at (w) = w->offset;
3287
3288 EV_FREQUENT_CHECK;
3289
3290 ++periodiccnt;
3291 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
3292 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
3293 ANHE_w (periodics [ev_active (w)]) = (WT)w;
3294 ANHE_at_cache (periodics [ev_active (w)]);
3295 upheap (periodics, ev_active (w));
3296
3297 EV_FREQUENT_CHECK;
3298
3299 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
3300}
3301
3302void noinline
3303ev_periodic_stop (EV_P_ ev_periodic *w)
3304{
3305 clear_pending (EV_A_ (W)w);
3306 if (expect_false (!ev_is_active (w)))
3307 return;
3308
3309 EV_FREQUENT_CHECK;
3310
3311 {
3312 int active = ev_active (w);
3313
3314 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3315
3316 --periodiccnt;
3317
3318 if (expect_true (active < periodiccnt + HEAP0))
286 { 3319 {
287 /* update fd-related kernel structures */ 3320 periodics [active] = periodics [periodiccnt + HEAP0];
288 method_reify (); fdchangecnt = 0; 3321 adjustheap (periodics, periodiccnt, active);
3322 }
3323 }
289 3324
290 /* calculate blocking time */ 3325 ev_stop (EV_A_ (W)w);
291 ev_now = ev_time ();
292 3326
293 if (flags & EVLOOP_NONBLOCK) 3327 EV_FREQUENT_CHECK;
294 block = 0.; 3328}
295 else if (!timercnt) 3329
296 block = MAX_BLOCKTIME; 3330void noinline
3331ev_periodic_again (EV_P_ ev_periodic *w)
3332{
3333 /* TODO: use adjustheap and recalculation */
3334 ev_periodic_stop (EV_A_ w);
3335 ev_periodic_start (EV_A_ w);
3336}
3337#endif
3338
3339#ifndef SA_RESTART
3340# define SA_RESTART 0
3341#endif
3342
3343#if EV_SIGNAL_ENABLE
3344
3345void noinline
3346ev_signal_start (EV_P_ ev_signal *w)
3347{
3348 if (expect_false (ev_is_active (w)))
3349 return;
3350
3351 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3352
3353#if EV_MULTIPLICITY
3354 assert (("libev: a signal must not be attached to two different loops",
3355 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3356
3357 signals [w->signum - 1].loop = EV_A;
3358#endif
3359
3360 EV_FREQUENT_CHECK;
3361
3362#if EV_USE_SIGNALFD
3363 if (sigfd == -2)
3364 {
3365 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3366 if (sigfd < 0 && errno == EINVAL)
3367 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3368
3369 if (sigfd >= 0)
3370 {
3371 fd_intern (sigfd); /* doing it twice will not hurt */
3372
3373 sigemptyset (&sigfd_set);
3374
3375 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3376 ev_set_priority (&sigfd_w, EV_MAXPRI);
3377 ev_io_start (EV_A_ &sigfd_w);
3378 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3379 }
3380 }
3381
3382 if (sigfd >= 0)
3383 {
3384 /* TODO: check .head */
3385 sigaddset (&sigfd_set, w->signum);
3386 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3387
3388 signalfd (sigfd, &sigfd_set, 0);
3389 }
3390#endif
3391
3392 ev_start (EV_A_ (W)w, 1);
3393 wlist_add (&signals [w->signum - 1].head, (WL)w);
3394
3395 if (!((WL)w)->next)
3396# if EV_USE_SIGNALFD
3397 if (sigfd < 0) /*TODO*/
3398# endif
3399 {
3400# ifdef _WIN32
3401 evpipe_init (EV_A);
3402
3403 signal (w->signum, ev_sighandler);
3404# else
3405 struct sigaction sa;
3406
3407 evpipe_init (EV_A);
3408
3409 sa.sa_handler = ev_sighandler;
3410 sigfillset (&sa.sa_mask);
3411 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3412 sigaction (w->signum, &sa, 0);
3413
3414 if (origflags & EVFLAG_NOSIGMASK)
3415 {
3416 sigemptyset (&sa.sa_mask);
3417 sigaddset (&sa.sa_mask, w->signum);
3418 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3419 }
3420#endif
3421 }
3422
3423 EV_FREQUENT_CHECK;
3424}
3425
3426void noinline
3427ev_signal_stop (EV_P_ ev_signal *w)
3428{
3429 clear_pending (EV_A_ (W)w);
3430 if (expect_false (!ev_is_active (w)))
3431 return;
3432
3433 EV_FREQUENT_CHECK;
3434
3435 wlist_del (&signals [w->signum - 1].head, (WL)w);
3436 ev_stop (EV_A_ (W)w);
3437
3438 if (!signals [w->signum - 1].head)
3439 {
3440#if EV_MULTIPLICITY
3441 signals [w->signum - 1].loop = 0; /* unattach from signal */
3442#endif
3443#if EV_USE_SIGNALFD
3444 if (sigfd >= 0)
3445 {
3446 sigset_t ss;
3447
3448 sigemptyset (&ss);
3449 sigaddset (&ss, w->signum);
3450 sigdelset (&sigfd_set, w->signum);
3451
3452 signalfd (sigfd, &sigfd_set, 0);
3453 sigprocmask (SIG_UNBLOCK, &ss, 0);
3454 }
297 else 3455 else
3456#endif
3457 signal (w->signum, SIG_DFL);
3458 }
3459
3460 EV_FREQUENT_CHECK;
3461}
3462
3463#endif
3464
3465#if EV_CHILD_ENABLE
3466
3467void
3468ev_child_start (EV_P_ ev_child *w)
3469{
3470#if EV_MULTIPLICITY
3471 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3472#endif
3473 if (expect_false (ev_is_active (w)))
3474 return;
3475
3476 EV_FREQUENT_CHECK;
3477
3478 ev_start (EV_A_ (W)w, 1);
3479 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3480
3481 EV_FREQUENT_CHECK;
3482}
3483
3484void
3485ev_child_stop (EV_P_ ev_child *w)
3486{
3487 clear_pending (EV_A_ (W)w);
3488 if (expect_false (!ev_is_active (w)))
3489 return;
3490
3491 EV_FREQUENT_CHECK;
3492
3493 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3494 ev_stop (EV_A_ (W)w);
3495
3496 EV_FREQUENT_CHECK;
3497}
3498
3499#endif
3500
3501#if EV_STAT_ENABLE
3502
3503# ifdef _WIN32
3504# undef lstat
3505# define lstat(a,b) _stati64 (a,b)
3506# endif
3507
3508#define DEF_STAT_INTERVAL 5.0074891
3509#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3510#define MIN_STAT_INTERVAL 0.1074891
3511
3512static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3513
3514#if EV_USE_INOTIFY
3515
3516/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3517# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3518
3519static void noinline
3520infy_add (EV_P_ ev_stat *w)
3521{
3522 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);
3523
3524 if (w->wd >= 0)
3525 {
3526 struct statfs sfs;
3527
3528 /* now local changes will be tracked by inotify, but remote changes won't */
3529 /* unless the filesystem is known to be local, we therefore still poll */
3530 /* also do poll on <2.6.25, but with normal frequency */
3531
3532 if (!fs_2625)
3533 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3534 else if (!statfs (w->path, &sfs)
3535 && (sfs.f_type == 0x1373 /* devfs */
3536 || sfs.f_type == 0xEF53 /* ext2/3 */
3537 || sfs.f_type == 0x3153464a /* jfs */
3538 || sfs.f_type == 0x52654973 /* reiser3 */
3539 || sfs.f_type == 0x01021994 /* tempfs */
3540 || sfs.f_type == 0x58465342 /* xfs */))
3541 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3542 else
3543 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3544 }
3545 else
3546 {
3547 /* can't use inotify, continue to stat */
3548 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3549
3550 /* if path is not there, monitor some parent directory for speedup hints */
3551 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3552 /* but an efficiency issue only */
3553 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
298 { 3554 {
299 block = timers [0]->at - ev_now + method_fudge; 3555 char path [4096];
300 if (block < 0.) block = 0.; 3556 strcpy (path, w->path);
301 else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME; 3557
3558 do
3559 {
3560 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
3561 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
3562
3563 char *pend = strrchr (path, '/');
3564
3565 if (!pend || pend == path)
3566 break;
3567
3568 *pend = 0;
3569 w->wd = inotify_add_watch (fs_fd, path, mask);
3570 }
3571 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
302 } 3572 }
3573 }
303 3574
304 method_poll (block); 3575 if (w->wd >= 0)
3576 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
305 3577
306 /* put pending timers into pendign queue and reschedule them */ 3578 /* now re-arm timer, if required */
307 timer_reify (); 3579 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3580 ev_timer_again (EV_A_ &w->timer);
3581 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3582}
308 3583
309 ev_now = ev_time (); 3584static void noinline
310 call_pending (); 3585infy_del (EV_P_ ev_stat *w)
3586{
3587 int slot;
3588 int wd = w->wd;
3589
3590 if (wd < 0)
3591 return;
3592
3593 w->wd = -2;
3594 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3595 wlist_del (&fs_hash [slot].head, (WL)w);
3596
3597 /* remove this watcher, if others are watching it, they will rearm */
3598 inotify_rm_watch (fs_fd, wd);
3599}
3600
3601static void noinline
3602infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3603{
3604 if (slot < 0)
3605 /* overflow, need to check for all hash slots */
3606 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3607 infy_wd (EV_A_ slot, wd, ev);
3608 else
311 } 3609 {
312 while (!ev_loop_done); 3610 WL w_;
3611
3612 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3613 {
3614 ev_stat *w = (ev_stat *)w_;
3615 w_ = w_->next; /* lets us remove this watcher and all before it */
3616
3617 if (w->wd == wd || wd == -1)
3618 {
3619 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3620 {
3621 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3622 w->wd = -1;
3623 infy_add (EV_A_ w); /* re-add, no matter what */
3624 }
3625
3626 stat_timer_cb (EV_A_ &w->timer, 0);
3627 }
3628 }
3629 }
313} 3630}
314 3631
315static void 3632static void
316wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem) 3633infy_cb (EV_P_ ev_io *w, int revents)
317{ 3634{
318 elem->next = *head; 3635 char buf [EV_INOTIFY_BUFSIZE];
319 *head = elem; 3636 int ofs;
3637 int len = read (fs_fd, buf, sizeof (buf));
3638
3639 for (ofs = 0; ofs < len; )
3640 {
3641 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3642 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3643 ofs += sizeof (struct inotify_event) + ev->len;
3644 }
3645}
3646
3647inline_size void ecb_cold
3648ev_check_2625 (EV_P)
3649{
3650 /* kernels < 2.6.25 are borked
3651 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3652 */
3653 if (ev_linux_version () < 0x020619)
3654 return;
3655
3656 fs_2625 = 1;
3657}
3658
3659inline_size int
3660infy_newfd (void)
3661{
3662#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3663 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3664 if (fd >= 0)
3665 return fd;
3666#endif
3667 return inotify_init ();
3668}
3669
3670inline_size void
3671infy_init (EV_P)
3672{
3673 if (fs_fd != -2)
3674 return;
3675
3676 fs_fd = -1;
3677
3678 ev_check_2625 (EV_A);
3679
3680 fs_fd = infy_newfd ();
3681
3682 if (fs_fd >= 0)
3683 {
3684 fd_intern (fs_fd);
3685 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3686 ev_set_priority (&fs_w, EV_MAXPRI);
3687 ev_io_start (EV_A_ &fs_w);
3688 ev_unref (EV_A);
3689 }
3690}
3691
3692inline_size void
3693infy_fork (EV_P)
3694{
3695 int slot;
3696
3697 if (fs_fd < 0)
3698 return;
3699
3700 ev_ref (EV_A);
3701 ev_io_stop (EV_A_ &fs_w);
3702 close (fs_fd);
3703 fs_fd = infy_newfd ();
3704
3705 if (fs_fd >= 0)
3706 {
3707 fd_intern (fs_fd);
3708 ev_io_set (&fs_w, fs_fd, EV_READ);
3709 ev_io_start (EV_A_ &fs_w);
3710 ev_unref (EV_A);
3711 }
3712
3713 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3714 {
3715 WL w_ = fs_hash [slot].head;
3716 fs_hash [slot].head = 0;
3717
3718 while (w_)
3719 {
3720 ev_stat *w = (ev_stat *)w_;
3721 w_ = w_->next; /* lets us add this watcher */
3722
3723 w->wd = -1;
3724
3725 if (fs_fd >= 0)
3726 infy_add (EV_A_ w); /* re-add, no matter what */
3727 else
3728 {
3729 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3730 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3731 ev_timer_again (EV_A_ &w->timer);
3732 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3733 }
3734 }
3735 }
3736}
3737
3738#endif
3739
3740#ifdef _WIN32
3741# define EV_LSTAT(p,b) _stati64 (p, b)
3742#else
3743# define EV_LSTAT(p,b) lstat (p, b)
3744#endif
3745
3746void
3747ev_stat_stat (EV_P_ ev_stat *w)
3748{
3749 if (lstat (w->path, &w->attr) < 0)
3750 w->attr.st_nlink = 0;
3751 else if (!w->attr.st_nlink)
3752 w->attr.st_nlink = 1;
3753}
3754
3755static void noinline
3756stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3757{
3758 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3759
3760 ev_statdata prev = w->attr;
3761 ev_stat_stat (EV_A_ w);
3762
3763 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3764 if (
3765 prev.st_dev != w->attr.st_dev
3766 || prev.st_ino != w->attr.st_ino
3767 || prev.st_mode != w->attr.st_mode
3768 || prev.st_nlink != w->attr.st_nlink
3769 || prev.st_uid != w->attr.st_uid
3770 || prev.st_gid != w->attr.st_gid
3771 || prev.st_rdev != w->attr.st_rdev
3772 || prev.st_size != w->attr.st_size
3773 || prev.st_atime != w->attr.st_atime
3774 || prev.st_mtime != w->attr.st_mtime
3775 || prev.st_ctime != w->attr.st_ctime
3776 ) {
3777 /* we only update w->prev on actual differences */
3778 /* in case we test more often than invoke the callback, */
3779 /* to ensure that prev is always different to attr */
3780 w->prev = prev;
3781
3782 #if EV_USE_INOTIFY
3783 if (fs_fd >= 0)
3784 {
3785 infy_del (EV_A_ w);
3786 infy_add (EV_A_ w);
3787 ev_stat_stat (EV_A_ w); /* avoid race... */
3788 }
3789 #endif
3790
3791 ev_feed_event (EV_A_ w, EV_STAT);
3792 }
3793}
3794
3795void
3796ev_stat_start (EV_P_ ev_stat *w)
3797{
3798 if (expect_false (ev_is_active (w)))
3799 return;
3800
3801 ev_stat_stat (EV_A_ w);
3802
3803 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3804 w->interval = MIN_STAT_INTERVAL;
3805
3806 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3807 ev_set_priority (&w->timer, ev_priority (w));
3808
3809#if EV_USE_INOTIFY
3810 infy_init (EV_A);
3811
3812 if (fs_fd >= 0)
3813 infy_add (EV_A_ w);
3814 else
3815#endif
3816 {
3817 ev_timer_again (EV_A_ &w->timer);
3818 ev_unref (EV_A);
3819 }
3820
3821 ev_start (EV_A_ (W)w, 1);
3822
3823 EV_FREQUENT_CHECK;
3824}
3825
3826void
3827ev_stat_stop (EV_P_ ev_stat *w)
3828{
3829 clear_pending (EV_A_ (W)w);
3830 if (expect_false (!ev_is_active (w)))
3831 return;
3832
3833 EV_FREQUENT_CHECK;
3834
3835#if EV_USE_INOTIFY
3836 infy_del (EV_A_ w);
3837#endif
3838
3839 if (ev_is_active (&w->timer))
3840 {
3841 ev_ref (EV_A);
3842 ev_timer_stop (EV_A_ &w->timer);
3843 }
3844
3845 ev_stop (EV_A_ (W)w);
3846
3847 EV_FREQUENT_CHECK;
3848}
3849#endif
3850
3851#if EV_IDLE_ENABLE
3852void
3853ev_idle_start (EV_P_ ev_idle *w)
3854{
3855 if (expect_false (ev_is_active (w)))
3856 return;
3857
3858 pri_adjust (EV_A_ (W)w);
3859
3860 EV_FREQUENT_CHECK;
3861
3862 {
3863 int active = ++idlecnt [ABSPRI (w)];
3864
3865 ++idleall;
3866 ev_start (EV_A_ (W)w, active);
3867
3868 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3869 idles [ABSPRI (w)][active - 1] = w;
3870 }
3871
3872 EV_FREQUENT_CHECK;
3873}
3874
3875void
3876ev_idle_stop (EV_P_ ev_idle *w)
3877{
3878 clear_pending (EV_A_ (W)w);
3879 if (expect_false (!ev_is_active (w)))
3880 return;
3881
3882 EV_FREQUENT_CHECK;
3883
3884 {
3885 int active = ev_active (w);
3886
3887 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3888 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3889
3890 ev_stop (EV_A_ (W)w);
3891 --idleall;
3892 }
3893
3894 EV_FREQUENT_CHECK;
3895}
3896#endif
3897
3898#if EV_PREPARE_ENABLE
3899void
3900ev_prepare_start (EV_P_ ev_prepare *w)
3901{
3902 if (expect_false (ev_is_active (w)))
3903 return;
3904
3905 EV_FREQUENT_CHECK;
3906
3907 ev_start (EV_A_ (W)w, ++preparecnt);
3908 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3909 prepares [preparecnt - 1] = w;
3910
3911 EV_FREQUENT_CHECK;
3912}
3913
3914void
3915ev_prepare_stop (EV_P_ ev_prepare *w)
3916{
3917 clear_pending (EV_A_ (W)w);
3918 if (expect_false (!ev_is_active (w)))
3919 return;
3920
3921 EV_FREQUENT_CHECK;
3922
3923 {
3924 int active = ev_active (w);
3925
3926 prepares [active - 1] = prepares [--preparecnt];
3927 ev_active (prepares [active - 1]) = active;
3928 }
3929
3930 ev_stop (EV_A_ (W)w);
3931
3932 EV_FREQUENT_CHECK;
3933}
3934#endif
3935
3936#if EV_CHECK_ENABLE
3937void
3938ev_check_start (EV_P_ ev_check *w)
3939{
3940 if (expect_false (ev_is_active (w)))
3941 return;
3942
3943 EV_FREQUENT_CHECK;
3944
3945 ev_start (EV_A_ (W)w, ++checkcnt);
3946 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3947 checks [checkcnt - 1] = w;
3948
3949 EV_FREQUENT_CHECK;
3950}
3951
3952void
3953ev_check_stop (EV_P_ ev_check *w)
3954{
3955 clear_pending (EV_A_ (W)w);
3956 if (expect_false (!ev_is_active (w)))
3957 return;
3958
3959 EV_FREQUENT_CHECK;
3960
3961 {
3962 int active = ev_active (w);
3963
3964 checks [active - 1] = checks [--checkcnt];
3965 ev_active (checks [active - 1]) = active;
3966 }
3967
3968 ev_stop (EV_A_ (W)w);
3969
3970 EV_FREQUENT_CHECK;
3971}
3972#endif
3973
3974#if EV_EMBED_ENABLE
3975void noinline
3976ev_embed_sweep (EV_P_ ev_embed *w)
3977{
3978 ev_run (w->other, EVRUN_NOWAIT);
320} 3979}
321 3980
322static void 3981static void
323wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem) 3982embed_io_cb (EV_P_ ev_io *io, int revents)
324{ 3983{
325 while (*head) 3984 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
3985
3986 if (ev_cb (w))
3987 ev_feed_event (EV_A_ (W)w, EV_EMBED);
3988 else
3989 ev_run (w->other, EVRUN_NOWAIT);
3990}
3991
3992static void
3993embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3994{
3995 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3996
3997 {
3998 EV_P = w->other;
3999
4000 while (fdchangecnt)
326 { 4001 {
327 if (*head == elem) 4002 fd_reify (EV_A);
4003 ev_run (EV_A_ EVRUN_NOWAIT);
4004 }
4005 }
4006}
4007
4008static void
4009embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4010{
4011 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4012
4013 ev_embed_stop (EV_A_ w);
4014
4015 {
4016 EV_P = w->other;
4017
4018 ev_loop_fork (EV_A);
4019 ev_run (EV_A_ EVRUN_NOWAIT);
4020 }
4021
4022 ev_embed_start (EV_A_ w);
4023}
4024
4025#if 0
4026static void
4027embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4028{
4029 ev_idle_stop (EV_A_ idle);
4030}
4031#endif
4032
4033void
4034ev_embed_start (EV_P_ ev_embed *w)
4035{
4036 if (expect_false (ev_is_active (w)))
4037 return;
4038
4039 {
4040 EV_P = w->other;
4041 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4042 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4043 }
4044
4045 EV_FREQUENT_CHECK;
4046
4047 ev_set_priority (&w->io, ev_priority (w));
4048 ev_io_start (EV_A_ &w->io);
4049
4050 ev_prepare_init (&w->prepare, embed_prepare_cb);
4051 ev_set_priority (&w->prepare, EV_MINPRI);
4052 ev_prepare_start (EV_A_ &w->prepare);
4053
4054 ev_fork_init (&w->fork, embed_fork_cb);
4055 ev_fork_start (EV_A_ &w->fork);
4056
4057 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4058
4059 ev_start (EV_A_ (W)w, 1);
4060
4061 EV_FREQUENT_CHECK;
4062}
4063
4064void
4065ev_embed_stop (EV_P_ ev_embed *w)
4066{
4067 clear_pending (EV_A_ (W)w);
4068 if (expect_false (!ev_is_active (w)))
4069 return;
4070
4071 EV_FREQUENT_CHECK;
4072
4073 ev_io_stop (EV_A_ &w->io);
4074 ev_prepare_stop (EV_A_ &w->prepare);
4075 ev_fork_stop (EV_A_ &w->fork);
4076
4077 ev_stop (EV_A_ (W)w);
4078
4079 EV_FREQUENT_CHECK;
4080}
4081#endif
4082
4083#if EV_FORK_ENABLE
4084void
4085ev_fork_start (EV_P_ ev_fork *w)
4086{
4087 if (expect_false (ev_is_active (w)))
4088 return;
4089
4090 EV_FREQUENT_CHECK;
4091
4092 ev_start (EV_A_ (W)w, ++forkcnt);
4093 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4094 forks [forkcnt - 1] = w;
4095
4096 EV_FREQUENT_CHECK;
4097}
4098
4099void
4100ev_fork_stop (EV_P_ ev_fork *w)
4101{
4102 clear_pending (EV_A_ (W)w);
4103 if (expect_false (!ev_is_active (w)))
4104 return;
4105
4106 EV_FREQUENT_CHECK;
4107
4108 {
4109 int active = ev_active (w);
4110
4111 forks [active - 1] = forks [--forkcnt];
4112 ev_active (forks [active - 1]) = active;
4113 }
4114
4115 ev_stop (EV_A_ (W)w);
4116
4117 EV_FREQUENT_CHECK;
4118}
4119#endif
4120
4121#if EV_CLEANUP_ENABLE
4122void
4123ev_cleanup_start (EV_P_ ev_cleanup *w)
4124{
4125 if (expect_false (ev_is_active (w)))
4126 return;
4127
4128 EV_FREQUENT_CHECK;
4129
4130 ev_start (EV_A_ (W)w, ++cleanupcnt);
4131 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4132 cleanups [cleanupcnt - 1] = w;
4133
4134 /* cleanup watchers should never keep a refcount on the loop */
4135 ev_unref (EV_A);
4136 EV_FREQUENT_CHECK;
4137}
4138
4139void
4140ev_cleanup_stop (EV_P_ ev_cleanup *w)
4141{
4142 clear_pending (EV_A_ (W)w);
4143 if (expect_false (!ev_is_active (w)))
4144 return;
4145
4146 EV_FREQUENT_CHECK;
4147 ev_ref (EV_A);
4148
4149 {
4150 int active = ev_active (w);
4151
4152 cleanups [active - 1] = cleanups [--cleanupcnt];
4153 ev_active (cleanups [active - 1]) = active;
4154 }
4155
4156 ev_stop (EV_A_ (W)w);
4157
4158 EV_FREQUENT_CHECK;
4159}
4160#endif
4161
4162#if EV_ASYNC_ENABLE
4163void
4164ev_async_start (EV_P_ ev_async *w)
4165{
4166 if (expect_false (ev_is_active (w)))
4167 return;
4168
4169 w->sent = 0;
4170
4171 evpipe_init (EV_A);
4172
4173 EV_FREQUENT_CHECK;
4174
4175 ev_start (EV_A_ (W)w, ++asynccnt);
4176 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4177 asyncs [asynccnt - 1] = w;
4178
4179 EV_FREQUENT_CHECK;
4180}
4181
4182void
4183ev_async_stop (EV_P_ ev_async *w)
4184{
4185 clear_pending (EV_A_ (W)w);
4186 if (expect_false (!ev_is_active (w)))
4187 return;
4188
4189 EV_FREQUENT_CHECK;
4190
4191 {
4192 int active = ev_active (w);
4193
4194 asyncs [active - 1] = asyncs [--asynccnt];
4195 ev_active (asyncs [active - 1]) = active;
4196 }
4197
4198 ev_stop (EV_A_ (W)w);
4199
4200 EV_FREQUENT_CHECK;
4201}
4202
4203void
4204ev_async_send (EV_P_ ev_async *w)
4205{
4206 w->sent = 1;
4207 evpipe_write (EV_A_ &async_pending);
4208}
4209#endif
4210
4211/*****************************************************************************/
4212
4213struct ev_once
4214{
4215 ev_io io;
4216 ev_timer to;
4217 void (*cb)(int revents, void *arg);
4218 void *arg;
4219};
4220
4221static void
4222once_cb (EV_P_ struct ev_once *once, int revents)
4223{
4224 void (*cb)(int revents, void *arg) = once->cb;
4225 void *arg = once->arg;
4226
4227 ev_io_stop (EV_A_ &once->io);
4228 ev_timer_stop (EV_A_ &once->to);
4229 ev_free (once);
4230
4231 cb (revents, arg);
4232}
4233
4234static void
4235once_cb_io (EV_P_ ev_io *w, int revents)
4236{
4237 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4238
4239 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
4240}
4241
4242static void
4243once_cb_to (EV_P_ ev_timer *w, int revents)
4244{
4245 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4246
4247 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
4248}
4249
4250void
4251ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
4252{
4253 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
4254
4255 if (expect_false (!once))
4256 {
4257 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
4258 return;
4259 }
4260
4261 once->cb = cb;
4262 once->arg = arg;
4263
4264 ev_init (&once->io, once_cb_io);
4265 if (fd >= 0)
4266 {
4267 ev_io_set (&once->io, fd, events);
4268 ev_io_start (EV_A_ &once->io);
4269 }
4270
4271 ev_init (&once->to, once_cb_to);
4272 if (timeout >= 0.)
4273 {
4274 ev_timer_set (&once->to, timeout, 0.);
4275 ev_timer_start (EV_A_ &once->to);
4276 }
4277}
4278
4279/*****************************************************************************/
4280
4281#if EV_WALK_ENABLE
4282void ecb_cold
4283ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
4284{
4285 int i, j;
4286 ev_watcher_list *wl, *wn;
4287
4288 if (types & (EV_IO | EV_EMBED))
4289 for (i = 0; i < anfdmax; ++i)
4290 for (wl = anfds [i].head; wl; )
328 { 4291 {
329 *head = elem->next; 4292 wn = wl->next;
330 return; 4293
4294#if EV_EMBED_ENABLE
4295 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4296 {
4297 if (types & EV_EMBED)
4298 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4299 }
4300 else
4301#endif
4302#if EV_USE_INOTIFY
4303 if (ev_cb ((ev_io *)wl) == infy_cb)
4304 ;
4305 else
4306#endif
4307 if ((ev_io *)wl != &pipe_w)
4308 if (types & EV_IO)
4309 cb (EV_A_ EV_IO, wl);
4310
4311 wl = wn;
331 } 4312 }
332 4313
333 head = &(*head)->next; 4314 if (types & (EV_TIMER | EV_STAT))
334 } 4315 for (i = timercnt + HEAP0; i-- > HEAP0; )
335} 4316#if EV_STAT_ENABLE
336 4317 /*TODO: timer is not always active*/
337static void 4318 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
338ev_start (struct ev_watcher *w, int active) 4319 {
339{ 4320 if (types & EV_STAT)
340 w->pending = 0; 4321 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
341 w->active = active; 4322 }
342}
343
344static void
345ev_stop (struct ev_watcher *w)
346{
347 if (w->pending)
348 pendings [w->pending - 1].w = 0;
349
350 w->active = 0;
351 /* nop */
352}
353
354void
355evio_start (struct ev_io *w)
356{
357 if (ev_is_active (w))
358 return;
359
360 int fd = w->fd;
361
362 ev_start ((struct ev_watcher *)w, 1);
363 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
364 wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);
365
366 ++fdchangecnt;
367 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
368 fdchanges [fdchangecnt - 1] = fd;
369}
370
371void
372evio_stop (struct ev_io *w)
373{
374 if (!ev_is_active (w))
375 return;
376
377 wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);
378 ev_stop ((struct ev_watcher *)w);
379
380 ++fdchangecnt;
381 array_needsize (fdchanges, fdchangemax, fdchangecnt, );
382 fdchanges [fdchangecnt - 1] = w->fd;
383}
384
385void
386evtimer_start (struct ev_timer *w)
387{
388 if (ev_is_active (w))
389 return;
390
391 if (w->is_abs)
392 {
393 /* this formula differs from the one in timer_reify becuse we do not round up */
394 if (w->repeat)
395 w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
396 }
397 else 4323 else
398 w->at += ev_now; 4324#endif
4325 if (types & EV_TIMER)
4326 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
399 4327
400 ev_start ((struct ev_watcher *)w, ++timercnt); 4328#if EV_PERIODIC_ENABLE
401 array_needsize (timers, timermax, timercnt, ); 4329 if (types & EV_PERIODIC)
402 timers [timercnt - 1] = w; 4330 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
403 upheap (timercnt - 1); 4331 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
404} 4332#endif
405 4333
406void 4334#if EV_IDLE_ENABLE
407evtimer_stop (struct ev_timer *w) 4335 if (types & EV_IDLE)
408{ 4336 for (j = NUMPRI; j--; )
409 if (!ev_is_active (w)) 4337 for (i = idlecnt [j]; i--; )
410 return; 4338 cb (EV_A_ EV_IDLE, idles [j][i]);
4339#endif
411 4340
412 if (w->active < timercnt--) 4341#if EV_FORK_ENABLE
413 { 4342 if (types & EV_FORK)
414 timers [w->active - 1] = timers [timercnt]; 4343 for (i = forkcnt; i--; )
415 downheap (w->active - 1); 4344 if (ev_cb (forks [i]) != embed_fork_cb)
416 } 4345 cb (EV_A_ EV_FORK, forks [i]);
4346#endif
417 4347
418 ev_stop ((struct ev_watcher *)w); 4348#if EV_ASYNC_ENABLE
419} 4349 if (types & EV_ASYNC)
4350 for (i = asynccnt; i--; )
4351 cb (EV_A_ EV_ASYNC, asyncs [i]);
4352#endif
420 4353
421void 4354#if EV_PREPARE_ENABLE
422evsignal_start (struct ev_signal *w) 4355 if (types & EV_PREPARE)
423{ 4356 for (i = preparecnt; i--; )
424 if (ev_is_active (w)) 4357# if EV_EMBED_ENABLE
425 return; 4358 if (ev_cb (prepares [i]) != embed_prepare_cb)
426
427 ev_start ((struct ev_watcher *)w, 1);
428 array_needsize (signals, signalmax, w->signum, signals_init);
429 wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);
430}
431
432void
433evsignal_stop (struct ev_signal *w)
434{
435 if (!ev_is_active (w))
436 return;
437
438 wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1], (struct ev_watcher_list *)w);
439 ev_stop ((struct ev_watcher *)w);
440}
441
442/*****************************************************************************/
443#if 1
444
445static void
446sin_cb (struct ev_io *w, int revents)
447{
448 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
449}
450
451static void
452ocb (struct ev_timer *w, int revents)
453{
454 fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
455}
456
457int main (void)
458{
459 struct ev_io sin;
460
461 ev_init (0);
462
463 evw_init (&sin, sin_cb, 55);
464 evio_set (&sin, 0, EV_READ);
465 evio_start (&sin);
466
467 struct ev_timer t[1000];
468
469 int i;
470 for (i = 0; i < 1000; ++i)
471 {
472 struct ev_timer *w = t + i;
473 evw_init (w, ocb, i);
474 evtimer_set_rel (w, drand48 (), 0);
475 evtimer_start (w);
476 if (drand48 () < 0.5)
477 evtimer_stop (w);
478 }
479
480 ev_loop (0);
481
482 return 0;
483}
484
485#endif 4359# endif
4360 cb (EV_A_ EV_PREPARE, prepares [i]);
4361#endif
486 4362
4363#if EV_CHECK_ENABLE
4364 if (types & EV_CHECK)
4365 for (i = checkcnt; i--; )
4366 cb (EV_A_ EV_CHECK, checks [i]);
4367#endif
487 4368
4369#if EV_SIGNAL_ENABLE
4370 if (types & EV_SIGNAL)
4371 for (i = 0; i < EV_NSIG - 1; ++i)
4372 for (wl = signals [i].head; wl; )
4373 {
4374 wn = wl->next;
4375 cb (EV_A_ EV_SIGNAL, wl);
4376 wl = wn;
4377 }
4378#endif
488 4379
4380#if EV_CHILD_ENABLE
4381 if (types & EV_CHILD)
4382 for (i = (EV_PID_HASHSIZE); i--; )
4383 for (wl = childs [i]; wl; )
4384 {
4385 wn = wl->next;
4386 cb (EV_A_ EV_CHILD, wl);
4387 wl = wn;
4388 }
4389#endif
4390/* EV_STAT 0x00001000 /* stat data changed */
4391/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4392}
4393#endif
489 4394
4395#if EV_MULTIPLICITY
4396 #include "ev_wrap.h"
4397#endif
4398
4399EV_CPP(})
4400

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