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Comparing libev/ev.c (file contents):
Revision 1.27 by root, Wed Oct 31 22:16:36 2007 UTC vs.
Revision 1.398 by root, Sun Sep 25 21:27:35 2011 UTC

1/* 1/*
2 * libev event processing core, watcher management
3 *
2 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>
3 * All rights reserved. 5 * All rights reserved.
4 * 6 *
5 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
6 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
7 * met:
8 * 9 *
9 * * Redistributions of source code must retain the above copyright 10 * 1. Redistributions of source code must retain the above copyright notice,
10 * notice, this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
11 * 12 *
12 * * Redistributions in binary form must reproduce the above 13 * 2. Redistributions in binary form must reproduce the above copyright
13 * copyright notice, this list of conditions and the following 14 * notice, this list of conditions and the following disclaimer in the
14 * disclaimer in the documentation and/or other materials provided 15 * documentation and/or other materials provided with the distribution.
15 * with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
28 */ 38 */
29 39
30#include <math.h> 40/* this big block deduces configuration from config.h */
41#ifndef EV_STANDALONE
42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H
44# else
45# include "config.h"
46# endif
47
48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined(EV_USE_CLOCK_SYSCALL)
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
67
68# if HAVE_CLOCK_GETTIME
69# ifndef EV_USE_MONOTONIC
70# define EV_USE_MONOTONIC 1
71# endif
72# ifndef EV_USE_REALTIME
73# define EV_USE_REALTIME 0
74# endif
75# else
76# ifndef EV_USE_MONOTONIC
77# define EV_USE_MONOTONIC 0
78# endif
79# ifndef EV_USE_REALTIME
80# define EV_USE_REALTIME 0
81# endif
82# endif
83
84# if HAVE_NANOSLEEP
85# ifndef EV_USE_NANOSLEEP
86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
88# else
89# undef EV_USE_NANOSLEEP
90# define EV_USE_NANOSLEEP 0
91# endif
92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
94# ifndef EV_USE_SELECT
95# define EV_USE_SELECT EV_FEATURE_BACKENDS
96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
100# endif
101
102# if HAVE_POLL && HAVE_POLL_H
103# ifndef EV_USE_POLL
104# define EV_USE_POLL EV_FEATURE_BACKENDS
105# endif
106# else
107# undef EV_USE_POLL
108# define EV_USE_POLL 0
109# endif
110
111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
112# ifndef EV_USE_EPOLL
113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
118# endif
119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
121# ifndef EV_USE_KQUEUE
122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
127# endif
128
129# if HAVE_PORT_H && HAVE_PORT_CREATE
130# ifndef EV_USE_PORT
131# define EV_USE_PORT EV_FEATURE_BACKENDS
132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
136# endif
137
138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
139# ifndef EV_USE_INOTIFY
140# define EV_USE_INOTIFY EV_FEATURE_OS
141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
145# endif
146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
149# define EV_USE_SIGNALFD EV_FEATURE_OS
150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
154# endif
155
156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
163# endif
164
165#endif
166
31#include <stdlib.h> 167#include <stdlib.h>
32#include <unistd.h> 168#include <string.h>
33#include <fcntl.h> 169#include <fcntl.h>
34#include <signal.h>
35#include <stddef.h> 170#include <stddef.h>
36 171
37#include <stdio.h> 172#include <stdio.h>
38 173
39#include <assert.h> 174#include <assert.h>
40#include <errno.h> 175#include <errno.h>
41#include <sys/types.h> 176#include <sys/types.h>
42#include <sys/wait.h>
43#include <sys/time.h>
44#include <time.h> 177#include <time.h>
178#include <limits.h>
45 179
46#ifndef HAVE_MONOTONIC 180#include <signal.h>
47# ifdef CLOCK_MONOTONIC 181
48# define HAVE_MONOTONIC 1 182#ifdef EV_H
183# include EV_H
184#else
185# include "ev.h"
186#endif
187
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
49# endif 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
50#endif 251# endif
252#endif
51 253
52#ifndef HAVE_SELECT 254#ifndef EV_USE_MONOTONIC
53# define HAVE_SELECT 1 255# 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
54#endif 259# endif
260#endif
55 261
56#ifndef HAVE_EPOLL 262#ifndef EV_USE_REALTIME
57# define HAVE_EPOLL 0 263# 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
58#endif 271# endif
272#endif
59 273
60#ifndef HAVE_REALTIME 274#ifndef EV_USE_SELECT
61# define HAVE_REALTIME 1 /* posix requirement, but might be slower */ 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
62#endif 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
374#ifndef CLOCK_MONOTONIC
375# undef EV_USE_MONOTONIC
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>
393# endif
394#endif
395
396#if EV_USE_INOTIFY
397# include <sys/statfs.h>
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
405
406#if EV_SELECT_IS_WINSOCKET
407# include <winsock.h>
408#endif
409
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
425
426#if EV_USE_SIGNALFD
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)];
445};
446#endif
447
448/**/
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 */
63 462
64#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 463#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65#define MAX_BLOCKTIME 60. 464#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
66#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */
67 465
68#include "ev.h" 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)
69 468
70typedef struct ev_watcher *W; 469/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
71typedef struct ev_watcher_list *WL; 470/* ECB.H BEGIN */
72typedef struct ev_watcher_time *WT; 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 */
73 499
74static ev_tstamp now, diff; /* monotonic clock */ 500#ifndef ECB_H
75ev_tstamp ev_now; 501#define ECB_H
76int ev_method;
77 502
78static int have_monotonic; /* runtime */ 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
79 520
80static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 521/* many compilers define _GNUC_ to some versions but then only implement
81static void (*method_modify)(int fd, int oev, int nev); 522 * what their idiot authors think are the "more important" extensions,
82static void (*method_poll)(ev_tstamp timeout); 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
83 535
84/*****************************************************************************/ 536/*****************************************************************************/
85 537
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#endif
544
545#ifndef ECB_MEMORY_FENCE
546 #if ECB_GCC_VERSION(2,5) || defined(__INTEL_COMPILER) || defined(__clang__)
547 #if __i386__
548 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
549 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE /* non-lock xchg might be enough */
550 #define ECB_MEMORY_FENCE_RELEASE do { } while (0) /* unlikely to change in future cpus */
551 #elif __amd64
552 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
553 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("lfence" : : : "memory")
554 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("sfence") /* play safe - not needed in any current cpu */
555 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
556 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
557 #elif defined(__ARM_ARCH_6__ ) || defined(__ARM_ARCH_6J__ ) \
558 || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6ZK__)
559 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
560 #elif defined(__ARM_ARCH_7__ ) || defined(__ARM_ARCH_7A__ ) \
561 || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7R__ )
562 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
563 #endif
564 #endif
565#endif
566
567#ifndef ECB_MEMORY_FENCE
568 #if ECB_GCC_VERSION(4,4) || defined(__INTEL_COMPILER) || defined(__clang__)
569 #define ECB_MEMORY_FENCE __sync_synchronize ()
570 /*#define ECB_MEMORY_FENCE_ACQUIRE ({ char dummy = 0; __sync_lock_test_and_set (&dummy, 1); }) */
571 /*#define ECB_MEMORY_FENCE_RELEASE ({ char dummy = 1; __sync_lock_release (&dummy ); }) */
572 #elif _MSC_VER >= 1400 /* VC++ 2005 */
573 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
574 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
575 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
576 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
577 #elif defined(_WIN32)
578 #include <WinNT.h>
579 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
580 #endif
581#endif
582
583#ifndef ECB_MEMORY_FENCE
584 #if !ECB_AVOID_PTHREADS
585 /*
586 * if you get undefined symbol references to pthread_mutex_lock,
587 * or failure to find pthread.h, then you should implement
588 * the ECB_MEMORY_FENCE operations for your cpu/compiler
589 * OR provide pthread.h and link against the posix thread library
590 * of your system.
591 */
592 #include <pthread.h>
593 #define ECB_NEEDS_PTHREADS 1
594 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
595
596 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
597 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
598 #endif
599#endif
600
601#if !defined(ECB_MEMORY_FENCE_ACQUIRE) && defined(ECB_MEMORY_FENCE)
602 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
603#endif
604
605#if !defined(ECB_MEMORY_FENCE_RELEASE) && defined(ECB_MEMORY_FENCE)
606 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
607#endif
608
609/*****************************************************************************/
610
611#define ECB_C99 (__STDC_VERSION__ >= 199901L)
612
613#if __cplusplus
614 #define ecb_inline static inline
615#elif ECB_GCC_VERSION(2,5)
616 #define ecb_inline static __inline__
617#elif ECB_C99
618 #define ecb_inline static inline
619#else
620 #define ecb_inline static
621#endif
622
623#if ECB_GCC_VERSION(3,3)
624 #define ecb_restrict __restrict__
625#elif ECB_C99
626 #define ecb_restrict restrict
627#else
628 #define ecb_restrict
629#endif
630
631typedef int ecb_bool;
632
633#define ECB_CONCAT_(a, b) a ## b
634#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
635#define ECB_STRINGIFY_(a) # a
636#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
637
638#define ecb_function_ ecb_inline
639
640#if ECB_GCC_VERSION(3,1)
641 #define ecb_attribute(attrlist) __attribute__(attrlist)
642 #define ecb_is_constant(expr) __builtin_constant_p (expr)
643 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
644 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
645#else
646 #define ecb_attribute(attrlist)
647 #define ecb_is_constant(expr) 0
648 #define ecb_expect(expr,value) (expr)
649 #define ecb_prefetch(addr,rw,locality)
650#endif
651
652/* no emulation for ecb_decltype */
653#if ECB_GCC_VERSION(4,5)
654 #define ecb_decltype(x) __decltype(x)
655#elif ECB_GCC_VERSION(3,0)
656 #define ecb_decltype(x) __typeof(x)
657#endif
658
659#define ecb_noinline ecb_attribute ((__noinline__))
660#define ecb_noreturn ecb_attribute ((__noreturn__))
661#define ecb_unused ecb_attribute ((__unused__))
662#define ecb_const ecb_attribute ((__const__))
663#define ecb_pure ecb_attribute ((__pure__))
664
665#if ECB_GCC_VERSION(4,3)
666 #define ecb_artificial ecb_attribute ((__artificial__))
667 #define ecb_hot ecb_attribute ((__hot__))
668 #define ecb_cold ecb_attribute ((__cold__))
669#else
670 #define ecb_artificial
671 #define ecb_hot
672 #define ecb_cold
673#endif
674
675/* put around conditional expressions if you are very sure that the */
676/* expression is mostly true or mostly false. note that these return */
677/* booleans, not the expression. */
678#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
679#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
680/* for compatibility to the rest of the world */
681#define ecb_likely(expr) ecb_expect_true (expr)
682#define ecb_unlikely(expr) ecb_expect_false (expr)
683
684/* count trailing zero bits and count # of one bits */
685#if ECB_GCC_VERSION(3,4)
686 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
687 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
688 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
689 #define ecb_ctz32(x) __builtin_ctz (x)
690 #define ecb_ctz64(x) __builtin_ctzll (x)
691 #define ecb_popcount32(x) __builtin_popcount (x)
692 /* no popcountll */
693#else
694 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
695 ecb_function_ int
696 ecb_ctz32 (uint32_t x)
697 {
698 int r = 0;
699
700 x &= ~x + 1; /* this isolates the lowest bit */
701
702#if ECB_branchless_on_i386
703 r += !!(x & 0xaaaaaaaa) << 0;
704 r += !!(x & 0xcccccccc) << 1;
705 r += !!(x & 0xf0f0f0f0) << 2;
706 r += !!(x & 0xff00ff00) << 3;
707 r += !!(x & 0xffff0000) << 4;
708#else
709 if (x & 0xaaaaaaaa) r += 1;
710 if (x & 0xcccccccc) r += 2;
711 if (x & 0xf0f0f0f0) r += 4;
712 if (x & 0xff00ff00) r += 8;
713 if (x & 0xffff0000) r += 16;
714#endif
715
716 return r;
717 }
718
719 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
720 ecb_function_ int
721 ecb_ctz64 (uint64_t x)
722 {
723 int shift = x & 0xffffffffU ? 0 : 32;
724 return ecb_ctz32 (x >> shift) + shift;
725 }
726
727 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
728 ecb_function_ int
729 ecb_popcount32 (uint32_t x)
730 {
731 x -= (x >> 1) & 0x55555555;
732 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
733 x = ((x >> 4) + x) & 0x0f0f0f0f;
734 x *= 0x01010101;
735
736 return x >> 24;
737 }
738
739 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
740 ecb_function_ int ecb_ld32 (uint32_t x)
741 {
742 int r = 0;
743
744 if (x >> 16) { x >>= 16; r += 16; }
745 if (x >> 8) { x >>= 8; r += 8; }
746 if (x >> 4) { x >>= 4; r += 4; }
747 if (x >> 2) { x >>= 2; r += 2; }
748 if (x >> 1) { r += 1; }
749
750 return r;
751 }
752
753 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
754 ecb_function_ int ecb_ld64 (uint64_t x)
755 {
756 int r = 0;
757
758 if (x >> 32) { x >>= 32; r += 32; }
759
760 return r + ecb_ld32 (x);
761 }
762#endif
763
764/* popcount64 is only available on 64 bit cpus as gcc builtin */
765/* so for this version we are lazy */
766ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
767ecb_function_ int
768ecb_popcount64 (uint64_t x)
769{
770 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
771}
772
773ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
774ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
775ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
776ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
777ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
778ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
779ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
780ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
781
782ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
783ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
784ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
785ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
786ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
787ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
788ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
789ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
790
791#if ECB_GCC_VERSION(4,3)
792 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
793 #define ecb_bswap32(x) __builtin_bswap32 (x)
794 #define ecb_bswap64(x) __builtin_bswap64 (x)
795#else
796 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
797 ecb_function_ uint16_t
798 ecb_bswap16 (uint16_t x)
799 {
800 return ecb_rotl16 (x, 8);
801 }
802
803 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
804 ecb_function_ uint32_t
805 ecb_bswap32 (uint32_t x)
806 {
807 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
808 }
809
810 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
811 ecb_function_ uint64_t
812 ecb_bswap64 (uint64_t x)
813 {
814 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
815 }
816#endif
817
818#if ECB_GCC_VERSION(4,5)
819 #define ecb_unreachable() __builtin_unreachable ()
820#else
821 /* this seems to work fine, but gcc always emits a warning for it :/ */
822 ecb_function_ void ecb_unreachable (void) ecb_noreturn;
823 ecb_function_ void ecb_unreachable (void) { }
824#endif
825
826/* try to tell the compiler that some condition is definitely true */
827#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
828
829ecb_function_ unsigned char ecb_byteorder_helper (void) ecb_const;
830ecb_function_ unsigned char
831ecb_byteorder_helper (void)
832{
833 const uint32_t u = 0x11223344;
834 return *(unsigned char *)&u;
835}
836
837ecb_function_ ecb_bool ecb_big_endian (void) ecb_const;
838ecb_function_ ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
839ecb_function_ ecb_bool ecb_little_endian (void) ecb_const;
840ecb_function_ ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
841
842#if ECB_GCC_VERSION(3,0) || ECB_C99
843 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
844#else
845 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
846#endif
847
848#if __cplusplus
849 template<typename T>
850 static inline T ecb_div_rd (T val, T div)
851 {
852 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
853 }
854 template<typename T>
855 static inline T ecb_div_ru (T val, T div)
856 {
857 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
858 }
859#else
860 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
861 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
862#endif
863
864#if ecb_cplusplus_does_not_suck
865 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
866 template<typename T, int N>
867 static inline int ecb_array_length (const T (&arr)[N])
868 {
869 return N;
870 }
871#else
872 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
873#endif
874
875#endif
876
877/* ECB.H END */
878
879#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
880/* if your architecture doesn't need memory fences, e.g. because it is
881 * single-cpu/core, or if you use libev in a project that doesn't use libev
882 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
883 * libev, in which casess the memory fences become nops.
884 * alternatively, you can remove this #error and link against libpthread,
885 * which will then provide the memory fences.
886 */
887# error "memory fences not defined for your architecture, please report"
888#endif
889
890#ifndef ECB_MEMORY_FENCE
891# define ECB_MEMORY_FENCE do { } while (0)
892# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
893# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
894#endif
895
896#define expect_false(cond) ecb_expect_false (cond)
897#define expect_true(cond) ecb_expect_true (cond)
898#define noinline ecb_noinline
899
900#define inline_size ecb_inline
901
902#if EV_FEATURE_CODE
903# define inline_speed ecb_inline
904#else
905# define inline_speed static noinline
906#endif
907
908#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
909
910#if EV_MINPRI == EV_MAXPRI
911# define ABSPRI(w) (((W)w), 0)
912#else
913# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
914#endif
915
916#define EMPTY /* required for microsofts broken pseudo-c compiler */
917#define EMPTY2(a,b) /* used to suppress some warnings */
918
919typedef ev_watcher *W;
920typedef ev_watcher_list *WL;
921typedef ev_watcher_time *WT;
922
923#define ev_active(w) ((W)(w))->active
924#define ev_at(w) ((WT)(w))->at
925
926#if EV_USE_REALTIME
927/* sig_atomic_t is used to avoid per-thread variables or locking but still */
928/* giving it a reasonably high chance of working on typical architectures */
929static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
930#endif
931
932#if EV_USE_MONOTONIC
933static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
934#endif
935
936#ifndef EV_FD_TO_WIN32_HANDLE
937# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
938#endif
939#ifndef EV_WIN32_HANDLE_TO_FD
940# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
941#endif
942#ifndef EV_WIN32_CLOSE_FD
943# define EV_WIN32_CLOSE_FD(fd) close (fd)
944#endif
945
946#ifdef _WIN32
947# include "ev_win32.c"
948#endif
949
950/*****************************************************************************/
951
952/* define a suitable floor function (only used by periodics atm) */
953
954#if EV_USE_FLOOR
955# include <math.h>
956# define ev_floor(v) floor (v)
957#else
958
959#include <float.h>
960
961/* a floor() replacement function, should be independent of ev_tstamp type */
962static ev_tstamp noinline
963ev_floor (ev_tstamp v)
964{
965 /* the choice of shift factor is not terribly important */
966#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
967 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
968#else
969 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
970#endif
971
972 /* argument too large for an unsigned long? */
973 if (expect_false (v >= shift))
974 {
975 ev_tstamp f;
976
977 if (v == v - 1.)
978 return v; /* very large number */
979
980 f = shift * ev_floor (v * (1. / shift));
981 return f + ev_floor (v - f);
982 }
983
984 /* special treatment for negative args? */
985 if (expect_false (v < 0.))
986 {
987 ev_tstamp f = -ev_floor (-v);
988
989 return f - (f == v ? 0 : 1);
990 }
991
992 /* fits into an unsigned long */
993 return (unsigned long)v;
994}
995
996#endif
997
998/*****************************************************************************/
999
1000#ifdef __linux
1001# include <sys/utsname.h>
1002#endif
1003
1004static unsigned int noinline ecb_cold
1005ev_linux_version (void)
1006{
1007#ifdef __linux
1008 unsigned int v = 0;
1009 struct utsname buf;
1010 int i;
1011 char *p = buf.release;
1012
1013 if (uname (&buf))
1014 return 0;
1015
1016 for (i = 3+1; --i; )
1017 {
1018 unsigned int c = 0;
1019
1020 for (;;)
1021 {
1022 if (*p >= '0' && *p <= '9')
1023 c = c * 10 + *p++ - '0';
1024 else
1025 {
1026 p += *p == '.';
1027 break;
1028 }
1029 }
1030
1031 v = (v << 8) | c;
1032 }
1033
1034 return v;
1035#else
1036 return 0;
1037#endif
1038}
1039
1040/*****************************************************************************/
1041
1042#if EV_AVOID_STDIO
1043static void noinline ecb_cold
1044ev_printerr (const char *msg)
1045{
1046 write (STDERR_FILENO, msg, strlen (msg));
1047}
1048#endif
1049
1050static void (*syserr_cb)(const char *msg);
1051
1052void ecb_cold
1053ev_set_syserr_cb (void (*cb)(const char *msg))
1054{
1055 syserr_cb = cb;
1056}
1057
1058static void noinline ecb_cold
1059ev_syserr (const char *msg)
1060{
1061 if (!msg)
1062 msg = "(libev) system error";
1063
1064 if (syserr_cb)
1065 syserr_cb (msg);
1066 else
1067 {
1068#if EV_AVOID_STDIO
1069 ev_printerr (msg);
1070 ev_printerr (": ");
1071 ev_printerr (strerror (errno));
1072 ev_printerr ("\n");
1073#else
1074 perror (msg);
1075#endif
1076 abort ();
1077 }
1078}
1079
1080static void *
1081ev_realloc_emul (void *ptr, long size)
1082{
1083#if __GLIBC__
1084 return realloc (ptr, size);
1085#else
1086 /* some systems, notably openbsd and darwin, fail to properly
1087 * implement realloc (x, 0) (as required by both ansi c-89 and
1088 * the single unix specification, so work around them here.
1089 */
1090
1091 if (size)
1092 return realloc (ptr, size);
1093
1094 free (ptr);
1095 return 0;
1096#endif
1097}
1098
1099static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
1100
1101void ecb_cold
1102ev_set_allocator (void *(*cb)(void *ptr, long size))
1103{
1104 alloc = cb;
1105}
1106
1107inline_speed void *
1108ev_realloc (void *ptr, long size)
1109{
1110 ptr = alloc (ptr, size);
1111
1112 if (!ptr && size)
1113 {
1114#if EV_AVOID_STDIO
1115 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1116#else
1117 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1118#endif
1119 abort ();
1120 }
1121
1122 return ptr;
1123}
1124
1125#define ev_malloc(size) ev_realloc (0, (size))
1126#define ev_free(ptr) ev_realloc ((ptr), 0)
1127
1128/*****************************************************************************/
1129
1130/* set in reify when reification needed */
1131#define EV_ANFD_REIFY 1
1132
1133/* file descriptor info structure */
1134typedef struct
1135{
1136 WL head;
1137 unsigned char events; /* the events watched for */
1138 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1139 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
1140 unsigned char unused;
1141#if EV_USE_EPOLL
1142 unsigned int egen; /* generation counter to counter epoll bugs */
1143#endif
1144#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1145 SOCKET handle;
1146#endif
1147#if EV_USE_IOCP
1148 OVERLAPPED or, ow;
1149#endif
1150} ANFD;
1151
1152/* stores the pending event set for a given watcher */
1153typedef struct
1154{
1155 W w;
1156 int events; /* the pending event set for the given watcher */
1157} ANPENDING;
1158
1159#if EV_USE_INOTIFY
1160/* hash table entry per inotify-id */
1161typedef struct
1162{
1163 WL head;
1164} ANFS;
1165#endif
1166
1167/* Heap Entry */
1168#if EV_HEAP_CACHE_AT
1169 /* a heap element */
1170 typedef struct {
1171 ev_tstamp at;
1172 WT w;
1173 } ANHE;
1174
1175 #define ANHE_w(he) (he).w /* access watcher, read-write */
1176 #define ANHE_at(he) (he).at /* access cached at, read-only */
1177 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1178#else
1179 /* a heap element */
1180 typedef WT ANHE;
1181
1182 #define ANHE_w(he) (he)
1183 #define ANHE_at(he) (he)->at
1184 #define ANHE_at_cache(he)
1185#endif
1186
1187#if EV_MULTIPLICITY
1188
1189 struct ev_loop
1190 {
1191 ev_tstamp ev_rt_now;
1192 #define ev_rt_now ((loop)->ev_rt_now)
1193 #define VAR(name,decl) decl;
1194 #include "ev_vars.h"
1195 #undef VAR
1196 };
1197 #include "ev_wrap.h"
1198
1199 static struct ev_loop default_loop_struct;
1200 struct ev_loop *ev_default_loop_ptr;
1201
1202#else
1203
1204 ev_tstamp ev_rt_now;
1205 #define VAR(name,decl) static decl;
1206 #include "ev_vars.h"
1207 #undef VAR
1208
1209 static int ev_default_loop_ptr;
1210
1211#endif
1212
1213#if EV_FEATURE_API
1214# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1215# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1216# define EV_INVOKE_PENDING invoke_cb (EV_A)
1217#else
1218# define EV_RELEASE_CB (void)0
1219# define EV_ACQUIRE_CB (void)0
1220# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1221#endif
1222
1223#define EVBREAK_RECURSE 0x80
1224
1225/*****************************************************************************/
1226
1227#ifndef EV_HAVE_EV_TIME
86ev_tstamp 1228ev_tstamp
87ev_time (void) 1229ev_time (void)
88{ 1230{
89#if HAVE_REALTIME 1231#if EV_USE_REALTIME
1232 if (expect_true (have_realtime))
1233 {
90 struct timespec ts; 1234 struct timespec ts;
91 clock_gettime (CLOCK_REALTIME, &ts); 1235 clock_gettime (CLOCK_REALTIME, &ts);
92 return ts.tv_sec + ts.tv_nsec * 1e-9; 1236 return ts.tv_sec + ts.tv_nsec * 1e-9;
93#else 1237 }
1238#endif
1239
94 struct timeval tv; 1240 struct timeval tv;
95 gettimeofday (&tv, 0); 1241 gettimeofday (&tv, 0);
96 return tv.tv_sec + tv.tv_usec * 1e-6; 1242 return tv.tv_sec + tv.tv_usec * 1e-6;
97#endif
98} 1243}
1244#endif
99 1245
100static ev_tstamp 1246inline_size ev_tstamp
101get_clock (void) 1247get_clock (void)
102{ 1248{
103#if HAVE_MONOTONIC 1249#if EV_USE_MONOTONIC
104 if (have_monotonic) 1250 if (expect_true (have_monotonic))
105 { 1251 {
106 struct timespec ts; 1252 struct timespec ts;
107 clock_gettime (CLOCK_MONOTONIC, &ts); 1253 clock_gettime (CLOCK_MONOTONIC, &ts);
108 return ts.tv_sec + ts.tv_nsec * 1e-9; 1254 return ts.tv_sec + ts.tv_nsec * 1e-9;
109 } 1255 }
110#endif 1256#endif
111 1257
112 return ev_time (); 1258 return ev_time ();
113} 1259}
114 1260
115#define array_needsize(base,cur,cnt,init) \ 1261#if EV_MULTIPLICITY
116 if ((cnt) > cur) \ 1262ev_tstamp
117 { \ 1263ev_now (EV_P)
118 int newcnt = cur; \ 1264{
119 do \ 1265 return ev_rt_now;
120 { \ 1266}
121 newcnt = (newcnt << 1) | 4 & ~3; \ 1267#endif
122 } \ 1268
123 while ((cnt) > newcnt); \ 1269void
124 \ 1270ev_sleep (ev_tstamp delay)
125 base = realloc (base, sizeof (*base) * (newcnt)); \ 1271{
126 init (base + cur, newcnt - cur); \ 1272 if (delay > 0.)
127 cur = newcnt; \
128 } 1273 {
1274#if EV_USE_NANOSLEEP
1275 struct timespec ts;
1276
1277 EV_TS_SET (ts, delay);
1278 nanosleep (&ts, 0);
1279#elif defined(_WIN32)
1280 Sleep ((unsigned long)(delay * 1e3));
1281#else
1282 struct timeval tv;
1283
1284 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1285 /* something not guaranteed by newer posix versions, but guaranteed */
1286 /* by older ones */
1287 EV_TV_SET (tv, delay);
1288 select (0, 0, 0, 0, &tv);
1289#endif
1290 }
1291}
129 1292
130/*****************************************************************************/ 1293/*****************************************************************************/
131 1294
132typedef struct 1295#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
133{
134 struct ev_io *head;
135 int events;
136} ANFD;
137 1296
138static ANFD *anfds; 1297/* find a suitable new size for the given array, */
139static int anfdmax; 1298/* hopefully by rounding to a nice-to-malloc size */
140 1299inline_size int
141static void 1300array_nextsize (int elem, int cur, int cnt)
142anfds_init (ANFD *base, int count)
143{ 1301{
144 while (count--) 1302 int ncur = cur + 1;
145 { 1303
146 base->head = 0; 1304 do
147 base->events = EV_NONE; 1305 ncur <<= 1;
148 ++base; 1306 while (cnt > ncur);
1307
1308 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
1309 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
149 } 1310 {
150} 1311 ncur *= elem;
151 1312 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
152typedef struct 1313 ncur = ncur - sizeof (void *) * 4;
153{ 1314 ncur /= elem;
154 W w;
155 int events;
156} ANPENDING;
157
158static ANPENDING *pendings;
159static int pendingmax, pendingcnt;
160
161static void
162event (W w, int events)
163{
164 if (w->active)
165 { 1315 }
1316
1317 return ncur;
1318}
1319
1320static void * noinline ecb_cold
1321array_realloc (int elem, void *base, int *cur, int cnt)
1322{
1323 *cur = array_nextsize (elem, *cur, cnt);
1324 return ev_realloc (base, elem * *cur);
1325}
1326
1327#define array_init_zero(base,count) \
1328 memset ((void *)(base), 0, sizeof (*(base)) * (count))
1329
1330#define array_needsize(type,base,cur,cnt,init) \
1331 if (expect_false ((cnt) > (cur))) \
1332 { \
1333 int ecb_unused ocur_ = (cur); \
1334 (base) = (type *)array_realloc \
1335 (sizeof (type), (base), &(cur), (cnt)); \
1336 init ((base) + (ocur_), (cur) - ocur_); \
1337 }
1338
1339#if 0
1340#define array_slim(type,stem) \
1341 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
1342 { \
1343 stem ## max = array_roundsize (stem ## cnt >> 1); \
1344 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
1345 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
1346 }
1347#endif
1348
1349#define array_free(stem, idx) \
1350 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
1351
1352/*****************************************************************************/
1353
1354/* dummy callback for pending events */
1355static void noinline
1356pendingcb (EV_P_ ev_prepare *w, int revents)
1357{
1358}
1359
1360void noinline
1361ev_feed_event (EV_P_ void *w, int revents)
1362{
1363 W w_ = (W)w;
1364 int pri = ABSPRI (w_);
1365
1366 if (expect_false (w_->pending))
1367 pendings [pri][w_->pending - 1].events |= revents;
1368 else
1369 {
166 w->pending = ++pendingcnt; 1370 w_->pending = ++pendingcnt [pri];
167 array_needsize (pendings, pendingmax, pendingcnt, ); 1371 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
168 pendings [pendingcnt - 1].w = w; 1372 pendings [pri][w_->pending - 1].w = w_;
169 pendings [pendingcnt - 1].events = events; 1373 pendings [pri][w_->pending - 1].events = revents;
170 } 1374 }
171} 1375}
172 1376
173static void 1377inline_speed void
1378feed_reverse (EV_P_ W w)
1379{
1380 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1381 rfeeds [rfeedcnt++] = w;
1382}
1383
1384inline_size void
1385feed_reverse_done (EV_P_ int revents)
1386{
1387 do
1388 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1389 while (rfeedcnt);
1390}
1391
1392inline_speed void
174queue_events (W *events, int eventcnt, int type) 1393queue_events (EV_P_ W *events, int eventcnt, int type)
175{ 1394{
176 int i; 1395 int i;
177 1396
178 for (i = 0; i < eventcnt; ++i) 1397 for (i = 0; i < eventcnt; ++i)
179 event (events [i], type); 1398 ev_feed_event (EV_A_ events [i], type);
180} 1399}
181 1400
182static void 1401/*****************************************************************************/
1402
1403inline_speed void
183fd_event (int fd, int events) 1404fd_event_nocheck (EV_P_ int fd, int revents)
184{ 1405{
185 ANFD *anfd = anfds + fd; 1406 ANFD *anfd = anfds + fd;
186 struct ev_io *w; 1407 ev_io *w;
187 1408
188 for (w = anfd->head; w; w = w->next) 1409 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
189 { 1410 {
190 int ev = w->events & events; 1411 int ev = w->events & revents;
191 1412
192 if (ev) 1413 if (ev)
193 event ((W)w, ev); 1414 ev_feed_event (EV_A_ (W)w, ev);
194 } 1415 }
195} 1416}
196 1417
197/*****************************************************************************/ 1418/* do not submit kernel events for fds that have reify set */
1419/* because that means they changed while we were polling for new events */
1420inline_speed void
1421fd_event (EV_P_ int fd, int revents)
1422{
1423 ANFD *anfd = anfds + fd;
198 1424
199static int *fdchanges; 1425 if (expect_true (!anfd->reify))
200static int fdchangemax, fdchangecnt; 1426 fd_event_nocheck (EV_A_ fd, revents);
1427}
201 1428
202static void 1429void
203fd_reify (void) 1430ev_feed_fd_event (EV_P_ int fd, int revents)
1431{
1432 if (fd >= 0 && fd < anfdmax)
1433 fd_event_nocheck (EV_A_ fd, revents);
1434}
1435
1436/* make sure the external fd watch events are in-sync */
1437/* with the kernel/libev internal state */
1438inline_size void
1439fd_reify (EV_P)
204{ 1440{
205 int i; 1441 int i;
206 1442
1443#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
207 for (i = 0; i < fdchangecnt; ++i) 1444 for (i = 0; i < fdchangecnt; ++i)
208 { 1445 {
209 int fd = fdchanges [i]; 1446 int fd = fdchanges [i];
210 ANFD *anfd = anfds + fd; 1447 ANFD *anfd = anfds + fd;
211 struct ev_io *w;
212 1448
213 int events = 0; 1449 if (anfd->reify & EV__IOFDSET && anfd->head)
214
215 for (w = anfd->head; w; w = w->next)
216 events |= w->events;
217
218 anfd->events &= ~EV_REIFY;
219
220 if (anfd->events != events)
221 { 1450 {
1451 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1452
1453 if (handle != anfd->handle)
1454 {
1455 unsigned long arg;
1456
1457 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1458
1459 /* handle changed, but fd didn't - we need to do it in two steps */
222 method_modify (fd, anfd->events, events); 1460 backend_modify (EV_A_ fd, anfd->events, 0);
223 anfd->events = events; 1461 anfd->events = 0;
1462 anfd->handle = handle;
1463 }
224 } 1464 }
225 } 1465 }
1466#endif
1467
1468 for (i = 0; i < fdchangecnt; ++i)
1469 {
1470 int fd = fdchanges [i];
1471 ANFD *anfd = anfds + fd;
1472 ev_io *w;
1473
1474 unsigned char o_events = anfd->events;
1475 unsigned char o_reify = anfd->reify;
1476
1477 anfd->reify = 0;
1478
1479 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1480 {
1481 anfd->events = 0;
1482
1483 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1484 anfd->events |= (unsigned char)w->events;
1485
1486 if (o_events != anfd->events)
1487 o_reify = EV__IOFDSET; /* actually |= */
1488 }
1489
1490 if (o_reify & EV__IOFDSET)
1491 backend_modify (EV_A_ fd, o_events, anfd->events);
1492 }
226 1493
227 fdchangecnt = 0; 1494 fdchangecnt = 0;
228} 1495}
229 1496
230static void 1497/* something about the given fd changed */
231fd_change (int fd) 1498inline_size void
1499fd_change (EV_P_ int fd, int flags)
232{ 1500{
233 if (anfds [fd].events & EV_REIFY) 1501 unsigned char reify = anfds [fd].reify;
234 return; 1502 anfds [fd].reify |= flags;
235 1503
236 anfds [fd].events |= EV_REIFY; 1504 if (expect_true (!reify))
237 1505 {
238 ++fdchangecnt; 1506 ++fdchangecnt;
239 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1507 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
240 fdchanges [fdchangecnt - 1] = fd; 1508 fdchanges [fdchangecnt - 1] = fd;
1509 }
1510}
1511
1512/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1513inline_speed void ecb_cold
1514fd_kill (EV_P_ int fd)
1515{
1516 ev_io *w;
1517
1518 while ((w = (ev_io *)anfds [fd].head))
1519 {
1520 ev_io_stop (EV_A_ w);
1521 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1522 }
1523}
1524
1525/* check whether the given fd is actually valid, for error recovery */
1526inline_size int ecb_cold
1527fd_valid (int fd)
1528{
1529#ifdef _WIN32
1530 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1531#else
1532 return fcntl (fd, F_GETFD) != -1;
1533#endif
241} 1534}
242 1535
243/* called on EBADF to verify fds */ 1536/* called on EBADF to verify fds */
244static void 1537static void noinline ecb_cold
245fd_recheck (void) 1538fd_ebadf (EV_P)
246{ 1539{
247 int fd; 1540 int fd;
248 1541
249 for (fd = 0; fd < anfdmax; ++fd) 1542 for (fd = 0; fd < anfdmax; ++fd)
250 if (anfds [fd].events) 1543 if (anfds [fd].events)
251 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 1544 if (!fd_valid (fd) && errno == EBADF)
252 while (anfds [fd].head) 1545 fd_kill (EV_A_ fd);
1546}
1547
1548/* called on ENOMEM in select/poll to kill some fds and retry */
1549static void noinline ecb_cold
1550fd_enomem (EV_P)
1551{
1552 int fd;
1553
1554 for (fd = anfdmax; fd--; )
1555 if (anfds [fd].events)
1556 {
1557 fd_kill (EV_A_ fd);
1558 break;
1559 }
1560}
1561
1562/* usually called after fork if backend needs to re-arm all fds from scratch */
1563static void noinline
1564fd_rearm_all (EV_P)
1565{
1566 int fd;
1567
1568 for (fd = 0; fd < anfdmax; ++fd)
1569 if (anfds [fd].events)
1570 {
1571 anfds [fd].events = 0;
1572 anfds [fd].emask = 0;
1573 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1574 }
1575}
1576
1577/* used to prepare libev internal fd's */
1578/* this is not fork-safe */
1579inline_speed void
1580fd_intern (int fd)
1581{
1582#ifdef _WIN32
1583 unsigned long arg = 1;
1584 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1585#else
1586 fcntl (fd, F_SETFD, FD_CLOEXEC);
1587 fcntl (fd, F_SETFL, O_NONBLOCK);
1588#endif
1589}
1590
1591/*****************************************************************************/
1592
1593/*
1594 * the heap functions want a real array index. array index 0 is guaranteed to not
1595 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1596 * the branching factor of the d-tree.
1597 */
1598
1599/*
1600 * at the moment we allow libev the luxury of two heaps,
1601 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1602 * which is more cache-efficient.
1603 * the difference is about 5% with 50000+ watchers.
1604 */
1605#if EV_USE_4HEAP
1606
1607#define DHEAP 4
1608#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1609#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1610#define UPHEAP_DONE(p,k) ((p) == (k))
1611
1612/* away from the root */
1613inline_speed void
1614downheap (ANHE *heap, int N, int k)
1615{
1616 ANHE he = heap [k];
1617 ANHE *E = heap + N + HEAP0;
1618
1619 for (;;)
1620 {
1621 ev_tstamp minat;
1622 ANHE *minpos;
1623 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1624
1625 /* find minimum child */
1626 if (expect_true (pos + DHEAP - 1 < E))
1627 {
1628 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1629 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1630 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1631 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1632 }
1633 else if (pos < E)
1634 {
1635 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1636 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1637 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1638 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1639 }
1640 else
1641 break;
1642
1643 if (ANHE_at (he) <= minat)
1644 break;
1645
1646 heap [k] = *minpos;
1647 ev_active (ANHE_w (*minpos)) = k;
1648
1649 k = minpos - heap;
1650 }
1651
1652 heap [k] = he;
1653 ev_active (ANHE_w (he)) = k;
1654}
1655
1656#else /* 4HEAP */
1657
1658#define HEAP0 1
1659#define HPARENT(k) ((k) >> 1)
1660#define UPHEAP_DONE(p,k) (!(p))
1661
1662/* away from the root */
1663inline_speed void
1664downheap (ANHE *heap, int N, int k)
1665{
1666 ANHE he = heap [k];
1667
1668 for (;;)
1669 {
1670 int c = k << 1;
1671
1672 if (c >= N + HEAP0)
1673 break;
1674
1675 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1676 ? 1 : 0;
1677
1678 if (ANHE_at (he) <= ANHE_at (heap [c]))
1679 break;
1680
1681 heap [k] = heap [c];
1682 ev_active (ANHE_w (heap [k])) = k;
1683
1684 k = c;
1685 }
1686
1687 heap [k] = he;
1688 ev_active (ANHE_w (he)) = k;
1689}
1690#endif
1691
1692/* towards the root */
1693inline_speed void
1694upheap (ANHE *heap, int k)
1695{
1696 ANHE he = heap [k];
1697
1698 for (;;)
1699 {
1700 int p = HPARENT (k);
1701
1702 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1703 break;
1704
1705 heap [k] = heap [p];
1706 ev_active (ANHE_w (heap [k])) = k;
1707 k = p;
1708 }
1709
1710 heap [k] = he;
1711 ev_active (ANHE_w (he)) = k;
1712}
1713
1714/* move an element suitably so it is in a correct place */
1715inline_size void
1716adjustheap (ANHE *heap, int N, int k)
1717{
1718 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1719 upheap (heap, k);
1720 else
1721 downheap (heap, N, k);
1722}
1723
1724/* rebuild the heap: this function is used only once and executed rarely */
1725inline_size void
1726reheap (ANHE *heap, int N)
1727{
1728 int i;
1729
1730 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1731 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1732 for (i = 0; i < N; ++i)
1733 upheap (heap, i + HEAP0);
1734}
1735
1736/*****************************************************************************/
1737
1738/* associate signal watchers to a signal signal */
1739typedef struct
1740{
1741 EV_ATOMIC_T pending;
1742#if EV_MULTIPLICITY
1743 EV_P;
1744#endif
1745 WL head;
1746} ANSIG;
1747
1748static ANSIG signals [EV_NSIG - 1];
1749
1750/*****************************************************************************/
1751
1752#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1753
1754static void noinline ecb_cold
1755evpipe_init (EV_P)
1756{
1757 if (!ev_is_active (&pipe_w))
1758 {
1759# if EV_USE_EVENTFD
1760 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1761 if (evfd < 0 && errno == EINVAL)
1762 evfd = eventfd (0, 0);
1763
1764 if (evfd >= 0)
1765 {
1766 evpipe [0] = -1;
1767 fd_intern (evfd); /* doing it twice doesn't hurt */
1768 ev_io_set (&pipe_w, evfd, EV_READ);
1769 }
1770 else
1771# endif
1772 {
1773 while (pipe (evpipe))
1774 ev_syserr ("(libev) error creating signal/async pipe");
1775
1776 fd_intern (evpipe [0]);
1777 fd_intern (evpipe [1]);
1778 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1779 }
1780
1781 ev_io_start (EV_A_ &pipe_w);
1782 ev_unref (EV_A); /* watcher should not keep loop alive */
1783 }
1784}
1785
1786inline_speed void
1787evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1788{
1789 if (expect_true (*flag))
1790 return;
1791
1792 *flag = 1;
1793
1794 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1795
1796 pipe_write_skipped = 1;
1797
1798 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1799
1800 if (pipe_write_wanted)
1801 {
1802 int old_errno;
1803
1804 pipe_write_skipped = 0; /* just an optimisation, no fence needed */
1805
1806 old_errno = errno; /* save errno because write will clobber it */
1807
1808#if EV_USE_EVENTFD
1809 if (evfd >= 0)
1810 {
1811 uint64_t counter = 1;
1812 write (evfd, &counter, sizeof (uint64_t));
1813 }
1814 else
1815#endif
1816 {
1817 /* win32 people keep sending patches that change this write() to send() */
1818 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1819 /* so when you think this write should be a send instead, please find out */
1820 /* where your send() is from - it's definitely not the microsoft send, and */
1821 /* tell me. thank you. */
1822 write (evpipe [1], &(evpipe [1]), 1);
1823 }
1824
1825 errno = old_errno;
1826 }
1827}
1828
1829/* called whenever the libev signal pipe */
1830/* got some events (signal, async) */
1831static void
1832pipecb (EV_P_ ev_io *iow, int revents)
1833{
1834 int i;
1835
1836 if (revents & EV_READ)
1837 {
1838#if EV_USE_EVENTFD
1839 if (evfd >= 0)
1840 {
1841 uint64_t counter;
1842 read (evfd, &counter, sizeof (uint64_t));
1843 }
1844 else
1845#endif
1846 {
1847 char dummy;
1848 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1849 read (evpipe [0], &dummy, 1);
1850 }
1851 }
1852
1853 pipe_write_skipped = 0;
1854
1855#if EV_SIGNAL_ENABLE
1856 if (sig_pending)
1857 {
1858 sig_pending = 0;
1859
1860 for (i = EV_NSIG - 1; i--; )
1861 if (expect_false (signals [i].pending))
1862 ev_feed_signal_event (EV_A_ i + 1);
1863 }
1864#endif
1865
1866#if EV_ASYNC_ENABLE
1867 if (async_pending)
1868 {
1869 async_pending = 0;
1870
1871 for (i = asynccnt; i--; )
1872 if (asyncs [i]->sent)
253 { 1873 {
254 event ((W)anfds [fd].head, EV_ERROR); 1874 asyncs [i]->sent = 0;
255 evio_stop (anfds [fd].head); 1875 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
256 } 1876 }
1877 }
1878#endif
257} 1879}
258 1880
259/*****************************************************************************/ 1881/*****************************************************************************/
260 1882
261static struct ev_timer **timers; 1883void
262static int timermax, timercnt; 1884ev_feed_signal (int signum)
1885{
1886#if EV_MULTIPLICITY
1887 EV_P = signals [signum - 1].loop;
263 1888
264static struct ev_periodic **periodics; 1889 if (!EV_A)
265static int periodicmax, periodiccnt; 1890 return;
1891#endif
1892
1893 if (!ev_active (&pipe_w))
1894 return;
1895
1896 signals [signum - 1].pending = 1;
1897 evpipe_write (EV_A_ &sig_pending);
1898}
266 1899
267static void 1900static void
268upheap (WT *timers, int k) 1901ev_sighandler (int signum)
269{ 1902{
270 WT w = timers [k]; 1903#ifdef _WIN32
1904 signal (signum, ev_sighandler);
1905#endif
271 1906
272 while (k && timers [k >> 1]->at > w->at) 1907 ev_feed_signal (signum);
273 {
274 timers [k] = timers [k >> 1];
275 timers [k]->active = k + 1;
276 k >>= 1;
277 }
278
279 timers [k] = w;
280 timers [k]->active = k + 1;
281
282} 1908}
283 1909
1910void noinline
1911ev_feed_signal_event (EV_P_ int signum)
1912{
1913 WL w;
1914
1915 if (expect_false (signum <= 0 || signum > EV_NSIG))
1916 return;
1917
1918 --signum;
1919
1920#if EV_MULTIPLICITY
1921 /* it is permissible to try to feed a signal to the wrong loop */
1922 /* or, likely more useful, feeding a signal nobody is waiting for */
1923
1924 if (expect_false (signals [signum].loop != EV_A))
1925 return;
1926#endif
1927
1928 signals [signum].pending = 0;
1929
1930 for (w = signals [signum].head; w; w = w->next)
1931 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1932}
1933
1934#if EV_USE_SIGNALFD
284static void 1935static void
285downheap (WT *timers, int N, int k) 1936sigfdcb (EV_P_ ev_io *iow, int revents)
286{ 1937{
287 WT w = timers [k]; 1938 struct signalfd_siginfo si[2], *sip; /* these structs are big */
288 1939
289 while (k < (N >> 1)) 1940 for (;;)
290 { 1941 {
291 int j = k << 1; 1942 ssize_t res = read (sigfd, si, sizeof (si));
292 1943
293 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 1944 /* not ISO-C, as res might be -1, but works with SuS */
294 ++j; 1945 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1946 ev_feed_signal_event (EV_A_ sip->ssi_signo);
295 1947
296 if (w->at <= timers [j]->at) 1948 if (res < (ssize_t)sizeof (si))
297 break; 1949 break;
298
299 timers [k] = timers [j];
300 timers [k]->active = k + 1;
301 k = j;
302 } 1950 }
303
304 timers [k] = w;
305 timers [k]->active = k + 1;
306} 1951}
1952#endif
1953
1954#endif
307 1955
308/*****************************************************************************/ 1956/*****************************************************************************/
309 1957
310typedef struct 1958#if EV_CHILD_ENABLE
311{ 1959static WL childs [EV_PID_HASHSIZE];
312 struct ev_signal *head;
313 sig_atomic_t gotsig;
314} ANSIG;
315 1960
316static ANSIG *signals;
317static int signalmax;
318
319static int sigpipe [2];
320static sig_atomic_t gotsig;
321static struct ev_io sigev;
322
323static void
324signals_init (ANSIG *base, int count)
325{
326 while (count--)
327 {
328 base->head = 0;
329 base->gotsig = 0;
330 ++base;
331 }
332}
333
334static void
335sighandler (int signum)
336{
337 signals [signum - 1].gotsig = 1;
338
339 if (!gotsig)
340 {
341 gotsig = 1;
342 write (sigpipe [1], &gotsig, 1);
343 }
344}
345
346static void
347sigcb (struct ev_io *iow, int revents)
348{
349 struct ev_signal *w;
350 int sig;
351
352 gotsig = 0;
353 read (sigpipe [0], &revents, 1);
354
355 for (sig = signalmax; sig--; )
356 if (signals [sig].gotsig)
357 {
358 signals [sig].gotsig = 0;
359
360 for (w = signals [sig].head; w; w = w->next)
361 event ((W)w, EV_SIGNAL);
362 }
363}
364
365static void
366siginit (void)
367{
368 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
369 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
370
371 /* rather than sort out wether we really need nb, set it */
372 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
373 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
374
375 evio_set (&sigev, sigpipe [0], EV_READ);
376 evio_start (&sigev);
377}
378
379/*****************************************************************************/
380
381static struct ev_idle **idles;
382static int idlemax, idlecnt;
383
384static struct ev_prepare **prepares;
385static int preparemax, preparecnt;
386
387static struct ev_check **checks;
388static int checkmax, checkcnt;
389
390/*****************************************************************************/
391
392static struct ev_child *childs [PID_HASHSIZE];
393static struct ev_signal childev; 1961static ev_signal childev;
1962
1963#ifndef WIFCONTINUED
1964# define WIFCONTINUED(status) 0
1965#endif
1966
1967/* handle a single child status event */
1968inline_speed void
1969child_reap (EV_P_ int chain, int pid, int status)
1970{
1971 ev_child *w;
1972 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1973
1974 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1975 {
1976 if ((w->pid == pid || !w->pid)
1977 && (!traced || (w->flags & 1)))
1978 {
1979 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1980 w->rpid = pid;
1981 w->rstatus = status;
1982 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1983 }
1984 }
1985}
394 1986
395#ifndef WCONTINUED 1987#ifndef WCONTINUED
396# define WCONTINUED 0 1988# define WCONTINUED 0
397#endif 1989#endif
398 1990
1991/* called on sigchld etc., calls waitpid */
399static void 1992static void
400childcb (struct ev_signal *sw, int revents) 1993childcb (EV_P_ ev_signal *sw, int revents)
401{ 1994{
402 struct ev_child *w;
403 int pid, status; 1995 int pid, status;
404 1996
1997 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
405 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1998 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
406 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1999 if (!WCONTINUED
407 if (w->pid == pid || w->pid == -1) 2000 || errno != EINVAL
2001 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
2002 return;
2003
2004 /* make sure we are called again until all children have been reaped */
2005 /* we need to do it this way so that the callback gets called before we continue */
2006 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
2007
2008 child_reap (EV_A_ pid, pid, status);
2009 if ((EV_PID_HASHSIZE) > 1)
2010 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
2011}
2012
2013#endif
2014
2015/*****************************************************************************/
2016
2017#if EV_USE_IOCP
2018# include "ev_iocp.c"
2019#endif
2020#if EV_USE_PORT
2021# include "ev_port.c"
2022#endif
2023#if EV_USE_KQUEUE
2024# include "ev_kqueue.c"
2025#endif
2026#if EV_USE_EPOLL
2027# include "ev_epoll.c"
2028#endif
2029#if EV_USE_POLL
2030# include "ev_poll.c"
2031#endif
2032#if EV_USE_SELECT
2033# include "ev_select.c"
2034#endif
2035
2036int ecb_cold
2037ev_version_major (void)
2038{
2039 return EV_VERSION_MAJOR;
2040}
2041
2042int ecb_cold
2043ev_version_minor (void)
2044{
2045 return EV_VERSION_MINOR;
2046}
2047
2048/* return true if we are running with elevated privileges and should ignore env variables */
2049int inline_size ecb_cold
2050enable_secure (void)
2051{
2052#ifdef _WIN32
2053 return 0;
2054#else
2055 return getuid () != geteuid ()
2056 || getgid () != getegid ();
2057#endif
2058}
2059
2060unsigned int ecb_cold
2061ev_supported_backends (void)
2062{
2063 unsigned int flags = 0;
2064
2065 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2066 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
2067 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2068 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2069 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2070
2071 return flags;
2072}
2073
2074unsigned int ecb_cold
2075ev_recommended_backends (void)
2076{
2077 unsigned int flags = ev_supported_backends ();
2078
2079#ifndef __NetBSD__
2080 /* kqueue is borked on everything but netbsd apparently */
2081 /* it usually doesn't work correctly on anything but sockets and pipes */
2082 flags &= ~EVBACKEND_KQUEUE;
2083#endif
2084#ifdef __APPLE__
2085 /* only select works correctly on that "unix-certified" platform */
2086 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2087 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2088#endif
2089#ifdef __FreeBSD__
2090 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2091#endif
2092
2093 return flags;
2094}
2095
2096unsigned int ecb_cold
2097ev_embeddable_backends (void)
2098{
2099 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2100
2101 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2102 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2103 flags &= ~EVBACKEND_EPOLL;
2104
2105 return flags;
2106}
2107
2108unsigned int
2109ev_backend (EV_P)
2110{
2111 return backend;
2112}
2113
2114#if EV_FEATURE_API
2115unsigned int
2116ev_iteration (EV_P)
2117{
2118 return loop_count;
2119}
2120
2121unsigned int
2122ev_depth (EV_P)
2123{
2124 return loop_depth;
2125}
2126
2127void
2128ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
2129{
2130 io_blocktime = interval;
2131}
2132
2133void
2134ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
2135{
2136 timeout_blocktime = interval;
2137}
2138
2139void
2140ev_set_userdata (EV_P_ void *data)
2141{
2142 userdata = data;
2143}
2144
2145void *
2146ev_userdata (EV_P)
2147{
2148 return userdata;
2149}
2150
2151void
2152ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
2153{
2154 invoke_cb = invoke_pending_cb;
2155}
2156
2157void
2158ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
2159{
2160 release_cb = release;
2161 acquire_cb = acquire;
2162}
2163#endif
2164
2165/* initialise a loop structure, must be zero-initialised */
2166static void noinline ecb_cold
2167loop_init (EV_P_ unsigned int flags)
2168{
2169 if (!backend)
2170 {
2171 origflags = flags;
2172
2173#if EV_USE_REALTIME
2174 if (!have_realtime)
408 { 2175 {
409 w->status = status; 2176 struct timespec ts;
410 event ((W)w, EV_CHILD); 2177
2178 if (!clock_gettime (CLOCK_REALTIME, &ts))
2179 have_realtime = 1;
411 } 2180 }
2181#endif
2182
2183#if EV_USE_MONOTONIC
2184 if (!have_monotonic)
2185 {
2186 struct timespec ts;
2187
2188 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
2189 have_monotonic = 1;
2190 }
2191#endif
2192
2193 /* pid check not overridable via env */
2194#ifndef _WIN32
2195 if (flags & EVFLAG_FORKCHECK)
2196 curpid = getpid ();
2197#endif
2198
2199 if (!(flags & EVFLAG_NOENV)
2200 && !enable_secure ()
2201 && getenv ("LIBEV_FLAGS"))
2202 flags = atoi (getenv ("LIBEV_FLAGS"));
2203
2204 ev_rt_now = ev_time ();
2205 mn_now = get_clock ();
2206 now_floor = mn_now;
2207 rtmn_diff = ev_rt_now - mn_now;
2208#if EV_FEATURE_API
2209 invoke_cb = ev_invoke_pending;
2210#endif
2211
2212 io_blocktime = 0.;
2213 timeout_blocktime = 0.;
2214 backend = 0;
2215 backend_fd = -1;
2216 sig_pending = 0;
2217#if EV_ASYNC_ENABLE
2218 async_pending = 0;
2219#endif
2220 pipe_write_skipped = 0;
2221 pipe_write_wanted = 0;
2222#if EV_USE_INOTIFY
2223 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2224#endif
2225#if EV_USE_SIGNALFD
2226 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2227#endif
2228
2229 if (!(flags & EVBACKEND_MASK))
2230 flags |= ev_recommended_backends ();
2231
2232#if EV_USE_IOCP
2233 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2234#endif
2235#if EV_USE_PORT
2236 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
2237#endif
2238#if EV_USE_KQUEUE
2239 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
2240#endif
2241#if EV_USE_EPOLL
2242 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
2243#endif
2244#if EV_USE_POLL
2245 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
2246#endif
2247#if EV_USE_SELECT
2248 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
2249#endif
2250
2251 ev_prepare_init (&pending_w, pendingcb);
2252
2253#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2254 ev_init (&pipe_w, pipecb);
2255 ev_set_priority (&pipe_w, EV_MAXPRI);
2256#endif
2257 }
2258}
2259
2260/* free up a loop structure */
2261void ecb_cold
2262ev_loop_destroy (EV_P)
2263{
2264 int i;
2265
2266#if EV_MULTIPLICITY
2267 /* mimic free (0) */
2268 if (!EV_A)
2269 return;
2270#endif
2271
2272#if EV_CLEANUP_ENABLE
2273 /* queue cleanup watchers (and execute them) */
2274 if (expect_false (cleanupcnt))
2275 {
2276 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2277 EV_INVOKE_PENDING;
2278 }
2279#endif
2280
2281#if EV_CHILD_ENABLE
2282 if (ev_is_active (&childev))
2283 {
2284 ev_ref (EV_A); /* child watcher */
2285 ev_signal_stop (EV_A_ &childev);
2286 }
2287#endif
2288
2289 if (ev_is_active (&pipe_w))
2290 {
2291 /*ev_ref (EV_A);*/
2292 /*ev_io_stop (EV_A_ &pipe_w);*/
2293
2294#if EV_USE_EVENTFD
2295 if (evfd >= 0)
2296 close (evfd);
2297#endif
2298
2299 if (evpipe [0] >= 0)
2300 {
2301 EV_WIN32_CLOSE_FD (evpipe [0]);
2302 EV_WIN32_CLOSE_FD (evpipe [1]);
2303 }
2304 }
2305
2306#if EV_USE_SIGNALFD
2307 if (ev_is_active (&sigfd_w))
2308 close (sigfd);
2309#endif
2310
2311#if EV_USE_INOTIFY
2312 if (fs_fd >= 0)
2313 close (fs_fd);
2314#endif
2315
2316 if (backend_fd >= 0)
2317 close (backend_fd);
2318
2319#if EV_USE_IOCP
2320 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2321#endif
2322#if EV_USE_PORT
2323 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
2324#endif
2325#if EV_USE_KQUEUE
2326 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
2327#endif
2328#if EV_USE_EPOLL
2329 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
2330#endif
2331#if EV_USE_POLL
2332 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
2333#endif
2334#if EV_USE_SELECT
2335 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
2336#endif
2337
2338 for (i = NUMPRI; i--; )
2339 {
2340 array_free (pending, [i]);
2341#if EV_IDLE_ENABLE
2342 array_free (idle, [i]);
2343#endif
2344 }
2345
2346 ev_free (anfds); anfds = 0; anfdmax = 0;
2347
2348 /* have to use the microsoft-never-gets-it-right macro */
2349 array_free (rfeed, EMPTY);
2350 array_free (fdchange, EMPTY);
2351 array_free (timer, EMPTY);
2352#if EV_PERIODIC_ENABLE
2353 array_free (periodic, EMPTY);
2354#endif
2355#if EV_FORK_ENABLE
2356 array_free (fork, EMPTY);
2357#endif
2358#if EV_CLEANUP_ENABLE
2359 array_free (cleanup, EMPTY);
2360#endif
2361 array_free (prepare, EMPTY);
2362 array_free (check, EMPTY);
2363#if EV_ASYNC_ENABLE
2364 array_free (async, EMPTY);
2365#endif
2366
2367 backend = 0;
2368
2369#if EV_MULTIPLICITY
2370 if (ev_is_default_loop (EV_A))
2371#endif
2372 ev_default_loop_ptr = 0;
2373#if EV_MULTIPLICITY
2374 else
2375 ev_free (EV_A);
2376#endif
2377}
2378
2379#if EV_USE_INOTIFY
2380inline_size void infy_fork (EV_P);
2381#endif
2382
2383inline_size void
2384loop_fork (EV_P)
2385{
2386#if EV_USE_PORT
2387 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2388#endif
2389#if EV_USE_KQUEUE
2390 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
2391#endif
2392#if EV_USE_EPOLL
2393 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
2394#endif
2395#if EV_USE_INOTIFY
2396 infy_fork (EV_A);
2397#endif
2398
2399 if (ev_is_active (&pipe_w))
2400 {
2401 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2402
2403 ev_ref (EV_A);
2404 ev_io_stop (EV_A_ &pipe_w);
2405
2406#if EV_USE_EVENTFD
2407 if (evfd >= 0)
2408 close (evfd);
2409#endif
2410
2411 if (evpipe [0] >= 0)
2412 {
2413 EV_WIN32_CLOSE_FD (evpipe [0]);
2414 EV_WIN32_CLOSE_FD (evpipe [1]);
2415 }
2416
2417#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2418 evpipe_init (EV_A);
2419 /* now iterate over everything, in case we missed something */
2420 pipecb (EV_A_ &pipe_w, EV_READ);
2421#endif
2422 }
2423
2424 postfork = 0;
2425}
2426
2427#if EV_MULTIPLICITY
2428
2429struct ev_loop * ecb_cold
2430ev_loop_new (unsigned int flags)
2431{
2432 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2433
2434 memset (EV_A, 0, sizeof (struct ev_loop));
2435 loop_init (EV_A_ flags);
2436
2437 if (ev_backend (EV_A))
2438 return EV_A;
2439
2440 ev_free (EV_A);
2441 return 0;
2442}
2443
2444#endif /* multiplicity */
2445
2446#if EV_VERIFY
2447static void noinline ecb_cold
2448verify_watcher (EV_P_ W w)
2449{
2450 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2451
2452 if (w->pending)
2453 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2454}
2455
2456static void noinline ecb_cold
2457verify_heap (EV_P_ ANHE *heap, int N)
2458{
2459 int i;
2460
2461 for (i = HEAP0; i < N + HEAP0; ++i)
2462 {
2463 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2464 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2465 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2466
2467 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2468 }
2469}
2470
2471static void noinline ecb_cold
2472array_verify (EV_P_ W *ws, int cnt)
2473{
2474 while (cnt--)
2475 {
2476 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2477 verify_watcher (EV_A_ ws [cnt]);
2478 }
2479}
2480#endif
2481
2482#if EV_FEATURE_API
2483void ecb_cold
2484ev_verify (EV_P)
2485{
2486#if EV_VERIFY
2487 int i;
2488 WL w;
2489
2490 assert (activecnt >= -1);
2491
2492 assert (fdchangemax >= fdchangecnt);
2493 for (i = 0; i < fdchangecnt; ++i)
2494 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2495
2496 assert (anfdmax >= 0);
2497 for (i = 0; i < anfdmax; ++i)
2498 for (w = anfds [i].head; w; w = w->next)
2499 {
2500 verify_watcher (EV_A_ (W)w);
2501 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2502 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2503 }
2504
2505 assert (timermax >= timercnt);
2506 verify_heap (EV_A_ timers, timercnt);
2507
2508#if EV_PERIODIC_ENABLE
2509 assert (periodicmax >= periodiccnt);
2510 verify_heap (EV_A_ periodics, periodiccnt);
2511#endif
2512
2513 for (i = NUMPRI; i--; )
2514 {
2515 assert (pendingmax [i] >= pendingcnt [i]);
2516#if EV_IDLE_ENABLE
2517 assert (idleall >= 0);
2518 assert (idlemax [i] >= idlecnt [i]);
2519 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2520#endif
2521 }
2522
2523#if EV_FORK_ENABLE
2524 assert (forkmax >= forkcnt);
2525 array_verify (EV_A_ (W *)forks, forkcnt);
2526#endif
2527
2528#if EV_CLEANUP_ENABLE
2529 assert (cleanupmax >= cleanupcnt);
2530 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2531#endif
2532
2533#if EV_ASYNC_ENABLE
2534 assert (asyncmax >= asynccnt);
2535 array_verify (EV_A_ (W *)asyncs, asynccnt);
2536#endif
2537
2538#if EV_PREPARE_ENABLE
2539 assert (preparemax >= preparecnt);
2540 array_verify (EV_A_ (W *)prepares, preparecnt);
2541#endif
2542
2543#if EV_CHECK_ENABLE
2544 assert (checkmax >= checkcnt);
2545 array_verify (EV_A_ (W *)checks, checkcnt);
2546#endif
2547
2548# if 0
2549#if EV_CHILD_ENABLE
2550 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2551 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2552#endif
2553# endif
2554#endif
2555}
2556#endif
2557
2558#if EV_MULTIPLICITY
2559struct ev_loop * ecb_cold
2560#else
2561int
2562#endif
2563ev_default_loop (unsigned int flags)
2564{
2565 if (!ev_default_loop_ptr)
2566 {
2567#if EV_MULTIPLICITY
2568 EV_P = ev_default_loop_ptr = &default_loop_struct;
2569#else
2570 ev_default_loop_ptr = 1;
2571#endif
2572
2573 loop_init (EV_A_ flags);
2574
2575 if (ev_backend (EV_A))
2576 {
2577#if EV_CHILD_ENABLE
2578 ev_signal_init (&childev, childcb, SIGCHLD);
2579 ev_set_priority (&childev, EV_MAXPRI);
2580 ev_signal_start (EV_A_ &childev);
2581 ev_unref (EV_A); /* child watcher should not keep loop alive */
2582#endif
2583 }
2584 else
2585 ev_default_loop_ptr = 0;
2586 }
2587
2588 return ev_default_loop_ptr;
2589}
2590
2591void
2592ev_loop_fork (EV_P)
2593{
2594 postfork = 1; /* must be in line with ev_default_fork */
412} 2595}
413 2596
414/*****************************************************************************/ 2597/*****************************************************************************/
415 2598
416#if HAVE_EPOLL 2599void
417# include "ev_epoll.c" 2600ev_invoke (EV_P_ void *w, int revents)
2601{
2602 EV_CB_INVOKE ((W)w, revents);
2603}
2604
2605unsigned int
2606ev_pending_count (EV_P)
2607{
2608 int pri;
2609 unsigned int count = 0;
2610
2611 for (pri = NUMPRI; pri--; )
2612 count += pendingcnt [pri];
2613
2614 return count;
2615}
2616
2617void noinline
2618ev_invoke_pending (EV_P)
2619{
2620 int pri;
2621
2622 for (pri = NUMPRI; pri--; )
2623 while (pendingcnt [pri])
2624 {
2625 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
2626
2627 p->w->pending = 0;
2628 EV_CB_INVOKE (p->w, p->events);
2629 EV_FREQUENT_CHECK;
2630 }
2631}
2632
2633#if EV_IDLE_ENABLE
2634/* make idle watchers pending. this handles the "call-idle */
2635/* only when higher priorities are idle" logic */
2636inline_size void
2637idle_reify (EV_P)
2638{
2639 if (expect_false (idleall))
2640 {
2641 int pri;
2642
2643 for (pri = NUMPRI; pri--; )
2644 {
2645 if (pendingcnt [pri])
2646 break;
2647
2648 if (idlecnt [pri])
2649 {
2650 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2651 break;
2652 }
2653 }
2654 }
2655}
2656#endif
2657
2658/* make timers pending */
2659inline_size void
2660timers_reify (EV_P)
2661{
2662 EV_FREQUENT_CHECK;
2663
2664 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2665 {
2666 do
2667 {
2668 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2669
2670 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2671
2672 /* first reschedule or stop timer */
2673 if (w->repeat)
2674 {
2675 ev_at (w) += w->repeat;
2676 if (ev_at (w) < mn_now)
2677 ev_at (w) = mn_now;
2678
2679 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2680
2681 ANHE_at_cache (timers [HEAP0]);
2682 downheap (timers, timercnt, HEAP0);
2683 }
2684 else
2685 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2686
2687 EV_FREQUENT_CHECK;
2688 feed_reverse (EV_A_ (W)w);
2689 }
2690 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2691
2692 feed_reverse_done (EV_A_ EV_TIMER);
2693 }
2694}
2695
2696#if EV_PERIODIC_ENABLE
2697
2698static void noinline
2699periodic_recalc (EV_P_ ev_periodic *w)
2700{
2701 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2702 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2703
2704 /* the above almost always errs on the low side */
2705 while (at <= ev_rt_now)
2706 {
2707 ev_tstamp nat = at + w->interval;
2708
2709 /* when resolution fails us, we use ev_rt_now */
2710 if (expect_false (nat == at))
2711 {
2712 at = ev_rt_now;
2713 break;
2714 }
2715
2716 at = nat;
2717 }
2718
2719 ev_at (w) = at;
2720}
2721
2722/* make periodics pending */
2723inline_size void
2724periodics_reify (EV_P)
2725{
2726 EV_FREQUENT_CHECK;
2727
2728 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2729 {
2730 int feed_count = 0;
2731
2732 do
2733 {
2734 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2735
2736 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2737
2738 /* first reschedule or stop timer */
2739 if (w->reschedule_cb)
2740 {
2741 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2742
2743 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2744
2745 ANHE_at_cache (periodics [HEAP0]);
2746 downheap (periodics, periodiccnt, HEAP0);
2747 }
2748 else if (w->interval)
2749 {
2750 periodic_recalc (EV_A_ w);
2751 ANHE_at_cache (periodics [HEAP0]);
2752 downheap (periodics, periodiccnt, HEAP0);
2753 }
2754 else
2755 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2756
2757 EV_FREQUENT_CHECK;
2758 feed_reverse (EV_A_ (W)w);
2759 }
2760 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2761
2762 feed_reverse_done (EV_A_ EV_PERIODIC);
2763 }
2764}
2765
2766/* simply recalculate all periodics */
2767/* TODO: maybe ensure that at least one event happens when jumping forward? */
2768static void noinline ecb_cold
2769periodics_reschedule (EV_P)
2770{
2771 int i;
2772
2773 /* adjust periodics after time jump */
2774 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2775 {
2776 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2777
2778 if (w->reschedule_cb)
2779 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2780 else if (w->interval)
2781 periodic_recalc (EV_A_ w);
2782
2783 ANHE_at_cache (periodics [i]);
2784 }
2785
2786 reheap (periodics, periodiccnt);
2787}
2788#endif
2789
2790/* adjust all timers by a given offset */
2791static void noinline ecb_cold
2792timers_reschedule (EV_P_ ev_tstamp adjust)
2793{
2794 int i;
2795
2796 for (i = 0; i < timercnt; ++i)
2797 {
2798 ANHE *he = timers + i + HEAP0;
2799 ANHE_w (*he)->at += adjust;
2800 ANHE_at_cache (*he);
2801 }
2802}
2803
2804/* fetch new monotonic and realtime times from the kernel */
2805/* also detect if there was a timejump, and act accordingly */
2806inline_speed void
2807time_update (EV_P_ ev_tstamp max_block)
2808{
2809#if EV_USE_MONOTONIC
2810 if (expect_true (have_monotonic))
2811 {
2812 int i;
2813 ev_tstamp odiff = rtmn_diff;
2814
2815 mn_now = get_clock ();
2816
2817 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2818 /* interpolate in the meantime */
2819 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2820 {
2821 ev_rt_now = rtmn_diff + mn_now;
2822 return;
2823 }
2824
2825 now_floor = mn_now;
2826 ev_rt_now = ev_time ();
2827
2828 /* loop a few times, before making important decisions.
2829 * on the choice of "4": one iteration isn't enough,
2830 * in case we get preempted during the calls to
2831 * ev_time and get_clock. a second call is almost guaranteed
2832 * to succeed in that case, though. and looping a few more times
2833 * doesn't hurt either as we only do this on time-jumps or
2834 * in the unlikely event of having been preempted here.
2835 */
2836 for (i = 4; --i; )
2837 {
2838 ev_tstamp diff;
2839 rtmn_diff = ev_rt_now - mn_now;
2840
2841 diff = odiff - rtmn_diff;
2842
2843 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2844 return; /* all is well */
2845
2846 ev_rt_now = ev_time ();
2847 mn_now = get_clock ();
2848 now_floor = mn_now;
2849 }
2850
2851 /* no timer adjustment, as the monotonic clock doesn't jump */
2852 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2853# if EV_PERIODIC_ENABLE
2854 periodics_reschedule (EV_A);
418#endif 2855# endif
419#if HAVE_SELECT 2856 }
420# include "ev_select.c" 2857 else
421#endif 2858#endif
2859 {
2860 ev_rt_now = ev_time ();
2861
2862 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2863 {
2864 /* adjust timers. this is easy, as the offset is the same for all of them */
2865 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2866#if EV_PERIODIC_ENABLE
2867 periodics_reschedule (EV_A);
2868#endif
2869 }
2870
2871 mn_now = ev_rt_now;
2872 }
2873}
2874
2875void
2876ev_run (EV_P_ int flags)
2877{
2878#if EV_FEATURE_API
2879 ++loop_depth;
2880#endif
2881
2882 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2883
2884 loop_done = EVBREAK_CANCEL;
2885
2886 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2887
2888 do
2889 {
2890#if EV_VERIFY >= 2
2891 ev_verify (EV_A);
2892#endif
2893
2894#ifndef _WIN32
2895 if (expect_false (curpid)) /* penalise the forking check even more */
2896 if (expect_false (getpid () != curpid))
2897 {
2898 curpid = getpid ();
2899 postfork = 1;
2900 }
2901#endif
2902
2903#if EV_FORK_ENABLE
2904 /* we might have forked, so queue fork handlers */
2905 if (expect_false (postfork))
2906 if (forkcnt)
2907 {
2908 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2909 EV_INVOKE_PENDING;
2910 }
2911#endif
2912
2913#if EV_PREPARE_ENABLE
2914 /* queue prepare watchers (and execute them) */
2915 if (expect_false (preparecnt))
2916 {
2917 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2918 EV_INVOKE_PENDING;
2919 }
2920#endif
2921
2922 if (expect_false (loop_done))
2923 break;
2924
2925 /* we might have forked, so reify kernel state if necessary */
2926 if (expect_false (postfork))
2927 loop_fork (EV_A);
2928
2929 /* update fd-related kernel structures */
2930 fd_reify (EV_A);
2931
2932 /* calculate blocking time */
2933 {
2934 ev_tstamp waittime = 0.;
2935 ev_tstamp sleeptime = 0.;
2936
2937 /* remember old timestamp for io_blocktime calculation */
2938 ev_tstamp prev_mn_now = mn_now;
2939
2940 /* update time to cancel out callback processing overhead */
2941 time_update (EV_A_ 1e100);
2942
2943 /* from now on, we want a pipe-wake-up */
2944 pipe_write_wanted = 1;
2945
2946 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
2947
2948 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2949 {
2950 waittime = MAX_BLOCKTIME;
2951
2952 if (timercnt)
2953 {
2954 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2955 if (waittime > to) waittime = to;
2956 }
2957
2958#if EV_PERIODIC_ENABLE
2959 if (periodiccnt)
2960 {
2961 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2962 if (waittime > to) waittime = to;
2963 }
2964#endif
2965
2966 /* don't let timeouts decrease the waittime below timeout_blocktime */
2967 if (expect_false (waittime < timeout_blocktime))
2968 waittime = timeout_blocktime;
2969
2970 /* at this point, we NEED to wait, so we have to ensure */
2971 /* to pass a minimum nonzero value to the backend */
2972 if (expect_false (waittime < backend_mintime))
2973 waittime = backend_mintime;
2974
2975 /* extra check because io_blocktime is commonly 0 */
2976 if (expect_false (io_blocktime))
2977 {
2978 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2979
2980 if (sleeptime > waittime - backend_mintime)
2981 sleeptime = waittime - backend_mintime;
2982
2983 if (expect_true (sleeptime > 0.))
2984 {
2985 ev_sleep (sleeptime);
2986 waittime -= sleeptime;
2987 }
2988 }
2989 }
2990
2991#if EV_FEATURE_API
2992 ++loop_count;
2993#endif
2994 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2995 backend_poll (EV_A_ waittime);
2996 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2997
2998 pipe_write_wanted = 0; /* just an optimsiation, no fence needed */
2999
3000 if (pipe_write_skipped)
3001 {
3002 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3003 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3004 }
3005
3006
3007 /* update ev_rt_now, do magic */
3008 time_update (EV_A_ waittime + sleeptime);
3009 }
3010
3011 /* queue pending timers and reschedule them */
3012 timers_reify (EV_A); /* relative timers called last */
3013#if EV_PERIODIC_ENABLE
3014 periodics_reify (EV_A); /* absolute timers called first */
3015#endif
3016
3017#if EV_IDLE_ENABLE
3018 /* queue idle watchers unless other events are pending */
3019 idle_reify (EV_A);
3020#endif
3021
3022#if EV_CHECK_ENABLE
3023 /* queue check watchers, to be executed first */
3024 if (expect_false (checkcnt))
3025 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3026#endif
3027
3028 EV_INVOKE_PENDING;
3029 }
3030 while (expect_true (
3031 activecnt
3032 && !loop_done
3033 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3034 ));
3035
3036 if (loop_done == EVBREAK_ONE)
3037 loop_done = EVBREAK_CANCEL;
3038
3039#if EV_FEATURE_API
3040 --loop_depth;
3041#endif
3042}
3043
3044void
3045ev_break (EV_P_ int how)
3046{
3047 loop_done = how;
3048}
3049
3050void
3051ev_ref (EV_P)
3052{
3053 ++activecnt;
3054}
3055
3056void
3057ev_unref (EV_P)
3058{
3059 --activecnt;
3060}
3061
3062void
3063ev_now_update (EV_P)
3064{
3065 time_update (EV_A_ 1e100);
3066}
3067
3068void
3069ev_suspend (EV_P)
3070{
3071 ev_now_update (EV_A);
3072}
3073
3074void
3075ev_resume (EV_P)
3076{
3077 ev_tstamp mn_prev = mn_now;
3078
3079 ev_now_update (EV_A);
3080 timers_reschedule (EV_A_ mn_now - mn_prev);
3081#if EV_PERIODIC_ENABLE
3082 /* TODO: really do this? */
3083 periodics_reschedule (EV_A);
3084#endif
3085}
3086
3087/*****************************************************************************/
3088/* singly-linked list management, used when the expected list length is short */
3089
3090inline_size void
3091wlist_add (WL *head, WL elem)
3092{
3093 elem->next = *head;
3094 *head = elem;
3095}
3096
3097inline_size void
3098wlist_del (WL *head, WL elem)
3099{
3100 while (*head)
3101 {
3102 if (expect_true (*head == elem))
3103 {
3104 *head = elem->next;
3105 break;
3106 }
3107
3108 head = &(*head)->next;
3109 }
3110}
3111
3112/* internal, faster, version of ev_clear_pending */
3113inline_speed void
3114clear_pending (EV_P_ W w)
3115{
3116 if (w->pending)
3117 {
3118 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
3119 w->pending = 0;
3120 }
3121}
422 3122
423int 3123int
424ev_version_major (void) 3124ev_clear_pending (EV_P_ void *w)
425{ 3125{
426 return EV_VERSION_MAJOR; 3126 W w_ = (W)w;
427} 3127 int pending = w_->pending;
428 3128
429int 3129 if (expect_true (pending))
430ev_version_minor (void) 3130 {
431{ 3131 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
432 return EV_VERSION_MINOR; 3132 p->w = (W)&pending_w;
433} 3133 w_->pending = 0;
434 3134 return p->events;
435int ev_init (int flags)
436{
437 if (!ev_method)
438 { 3135 }
439#if HAVE_MONOTONIC 3136 else
3137 return 0;
3138}
3139
3140inline_size void
3141pri_adjust (EV_P_ W w)
3142{
3143 int pri = ev_priority (w);
3144 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3145 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3146 ev_set_priority (w, pri);
3147}
3148
3149inline_speed void
3150ev_start (EV_P_ W w, int active)
3151{
3152 pri_adjust (EV_A_ w);
3153 w->active = active;
3154 ev_ref (EV_A);
3155}
3156
3157inline_size void
3158ev_stop (EV_P_ W w)
3159{
3160 ev_unref (EV_A);
3161 w->active = 0;
3162}
3163
3164/*****************************************************************************/
3165
3166void noinline
3167ev_io_start (EV_P_ ev_io *w)
3168{
3169 int fd = w->fd;
3170
3171 if (expect_false (ev_is_active (w)))
3172 return;
3173
3174 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3175 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3176
3177 EV_FREQUENT_CHECK;
3178
3179 ev_start (EV_A_ (W)w, 1);
3180 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
3181 wlist_add (&anfds[fd].head, (WL)w);
3182
3183 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
3184 w->events &= ~EV__IOFDSET;
3185
3186 EV_FREQUENT_CHECK;
3187}
3188
3189void noinline
3190ev_io_stop (EV_P_ ev_io *w)
3191{
3192 clear_pending (EV_A_ (W)w);
3193 if (expect_false (!ev_is_active (w)))
3194 return;
3195
3196 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3197
3198 EV_FREQUENT_CHECK;
3199
3200 wlist_del (&anfds[w->fd].head, (WL)w);
3201 ev_stop (EV_A_ (W)w);
3202
3203 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3204
3205 EV_FREQUENT_CHECK;
3206}
3207
3208void noinline
3209ev_timer_start (EV_P_ ev_timer *w)
3210{
3211 if (expect_false (ev_is_active (w)))
3212 return;
3213
3214 ev_at (w) += mn_now;
3215
3216 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
3217
3218 EV_FREQUENT_CHECK;
3219
3220 ++timercnt;
3221 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
3222 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
3223 ANHE_w (timers [ev_active (w)]) = (WT)w;
3224 ANHE_at_cache (timers [ev_active (w)]);
3225 upheap (timers, ev_active (w));
3226
3227 EV_FREQUENT_CHECK;
3228
3229 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
3230}
3231
3232void noinline
3233ev_timer_stop (EV_P_ ev_timer *w)
3234{
3235 clear_pending (EV_A_ (W)w);
3236 if (expect_false (!ev_is_active (w)))
3237 return;
3238
3239 EV_FREQUENT_CHECK;
3240
3241 {
3242 int active = ev_active (w);
3243
3244 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3245
3246 --timercnt;
3247
3248 if (expect_true (active < timercnt + HEAP0))
440 { 3249 {
441 struct timespec ts; 3250 timers [active] = timers [timercnt + HEAP0];
442 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 3251 adjustheap (timers, timercnt, active);
443 have_monotonic = 1;
444 } 3252 }
445#endif 3253 }
446 3254
447 ev_now = ev_time (); 3255 ev_at (w) -= mn_now;
448 now = get_clock ();
449 diff = ev_now - now;
450 3256
451 if (pipe (sigpipe)) 3257 ev_stop (EV_A_ (W)w);
452 return 0;
453 3258
454 ev_method = EVMETHOD_NONE; 3259 EV_FREQUENT_CHECK;
455#if HAVE_EPOLL 3260}
456 if (ev_method == EVMETHOD_NONE) epoll_init (flags);
457#endif
458#if HAVE_SELECT
459 if (ev_method == EVMETHOD_NONE) select_init (flags);
460#endif
461 3261
462 if (ev_method) 3262void noinline
463 { 3263ev_timer_again (EV_P_ ev_timer *w)
464 evw_init (&sigev, sigcb); 3264{
465 siginit (); 3265 EV_FREQUENT_CHECK;
466 3266
467 evsignal_init (&childev, childcb, SIGCHLD); 3267 if (ev_is_active (w))
468 evsignal_start (&childev);
469 }
470 } 3268 {
471
472 return ev_method;
473}
474
475/*****************************************************************************/
476
477void
478ev_prefork (void)
479{
480 /* nop */
481}
482
483void
484ev_postfork_parent (void)
485{
486 /* nop */
487}
488
489void
490ev_postfork_child (void)
491{
492#if HAVE_EPOLL
493 if (ev_method == EVMETHOD_EPOLL)
494 epoll_postfork_child ();
495#endif
496
497 evio_stop (&sigev);
498 close (sigpipe [0]);
499 close (sigpipe [1]);
500 pipe (sigpipe);
501 siginit ();
502}
503
504/*****************************************************************************/
505
506static void
507call_pending (void)
508{
509 while (pendingcnt)
510 {
511 ANPENDING *p = pendings + --pendingcnt;
512
513 if (p->w)
514 {
515 p->w->pending = 0;
516 p->w->cb (p->w, p->events);
517 }
518 }
519}
520
521static void
522timers_reify (void)
523{
524 while (timercnt && timers [0]->at <= now)
525 {
526 struct ev_timer *w = timers [0];
527
528 event ((W)w, EV_TIMEOUT);
529
530 /* first reschedule or stop timer */
531 if (w->repeat) 3269 if (w->repeat)
532 { 3270 {
533 w->at = now + w->repeat; 3271 ev_at (w) = mn_now + w->repeat;
534 assert (("timer timeout in the past, negative repeat?", w->at > now)); 3272 ANHE_at_cache (timers [ev_active (w)]);
535 downheap ((WT *)timers, timercnt, 0); 3273 adjustheap (timers, timercnt, ev_active (w));
536 } 3274 }
537 else 3275 else
538 evtimer_stop (w); /* nonrepeating: stop timer */ 3276 ev_timer_stop (EV_A_ w);
539 }
540}
541
542static void
543periodics_reify (void)
544{
545 while (periodiccnt && periodics [0]->at <= ev_now)
546 { 3277 }
547 struct ev_periodic *w = periodics [0]; 3278 else if (w->repeat)
3279 {
3280 ev_at (w) = w->repeat;
3281 ev_timer_start (EV_A_ w);
3282 }
548 3283
549 /* first reschedule or stop timer */ 3284 EV_FREQUENT_CHECK;
3285}
3286
3287ev_tstamp
3288ev_timer_remaining (EV_P_ ev_timer *w)
3289{
3290 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3291}
3292
3293#if EV_PERIODIC_ENABLE
3294void noinline
3295ev_periodic_start (EV_P_ ev_periodic *w)
3296{
3297 if (expect_false (ev_is_active (w)))
3298 return;
3299
3300 if (w->reschedule_cb)
3301 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
550 if (w->interval) 3302 else if (w->interval)
3303 {
3304 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
3305 periodic_recalc (EV_A_ w);
3306 }
3307 else
3308 ev_at (w) = w->offset;
3309
3310 EV_FREQUENT_CHECK;
3311
3312 ++periodiccnt;
3313 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
3314 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
3315 ANHE_w (periodics [ev_active (w)]) = (WT)w;
3316 ANHE_at_cache (periodics [ev_active (w)]);
3317 upheap (periodics, ev_active (w));
3318
3319 EV_FREQUENT_CHECK;
3320
3321 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
3322}
3323
3324void noinline
3325ev_periodic_stop (EV_P_ ev_periodic *w)
3326{
3327 clear_pending (EV_A_ (W)w);
3328 if (expect_false (!ev_is_active (w)))
3329 return;
3330
3331 EV_FREQUENT_CHECK;
3332
3333 {
3334 int active = ev_active (w);
3335
3336 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3337
3338 --periodiccnt;
3339
3340 if (expect_true (active < periodiccnt + HEAP0))
3341 {
3342 periodics [active] = periodics [periodiccnt + HEAP0];
3343 adjustheap (periodics, periodiccnt, active);
3344 }
3345 }
3346
3347 ev_stop (EV_A_ (W)w);
3348
3349 EV_FREQUENT_CHECK;
3350}
3351
3352void noinline
3353ev_periodic_again (EV_P_ ev_periodic *w)
3354{
3355 /* TODO: use adjustheap and recalculation */
3356 ev_periodic_stop (EV_A_ w);
3357 ev_periodic_start (EV_A_ w);
3358}
3359#endif
3360
3361#ifndef SA_RESTART
3362# define SA_RESTART 0
3363#endif
3364
3365#if EV_SIGNAL_ENABLE
3366
3367void noinline
3368ev_signal_start (EV_P_ ev_signal *w)
3369{
3370 if (expect_false (ev_is_active (w)))
3371 return;
3372
3373 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3374
3375#if EV_MULTIPLICITY
3376 assert (("libev: a signal must not be attached to two different loops",
3377 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3378
3379 signals [w->signum - 1].loop = EV_A;
3380#endif
3381
3382 EV_FREQUENT_CHECK;
3383
3384#if EV_USE_SIGNALFD
3385 if (sigfd == -2)
3386 {
3387 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3388 if (sigfd < 0 && errno == EINVAL)
3389 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3390
3391 if (sigfd >= 0)
551 { 3392 {
552 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 3393 fd_intern (sigfd); /* doing it twice will not hurt */
553 assert (("periodic timeout in the past, negative interval?", w->at > ev_now)); 3394
554 downheap ((WT *)periodics, periodiccnt, 0); 3395 sigemptyset (&sigfd_set);
3396
3397 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3398 ev_set_priority (&sigfd_w, EV_MAXPRI);
3399 ev_io_start (EV_A_ &sigfd_w);
3400 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3401 }
3402 }
3403
3404 if (sigfd >= 0)
3405 {
3406 /* TODO: check .head */
3407 sigaddset (&sigfd_set, w->signum);
3408 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3409
3410 signalfd (sigfd, &sigfd_set, 0);
3411 }
3412#endif
3413
3414 ev_start (EV_A_ (W)w, 1);
3415 wlist_add (&signals [w->signum - 1].head, (WL)w);
3416
3417 if (!((WL)w)->next)
3418# if EV_USE_SIGNALFD
3419 if (sigfd < 0) /*TODO*/
3420# endif
3421 {
3422# ifdef _WIN32
3423 evpipe_init (EV_A);
3424
3425 signal (w->signum, ev_sighandler);
3426# else
3427 struct sigaction sa;
3428
3429 evpipe_init (EV_A);
3430
3431 sa.sa_handler = ev_sighandler;
3432 sigfillset (&sa.sa_mask);
3433 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3434 sigaction (w->signum, &sa, 0);
3435
3436 if (origflags & EVFLAG_NOSIGMASK)
3437 {
3438 sigemptyset (&sa.sa_mask);
3439 sigaddset (&sa.sa_mask, w->signum);
3440 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3441 }
3442#endif
3443 }
3444
3445 EV_FREQUENT_CHECK;
3446}
3447
3448void noinline
3449ev_signal_stop (EV_P_ ev_signal *w)
3450{
3451 clear_pending (EV_A_ (W)w);
3452 if (expect_false (!ev_is_active (w)))
3453 return;
3454
3455 EV_FREQUENT_CHECK;
3456
3457 wlist_del (&signals [w->signum - 1].head, (WL)w);
3458 ev_stop (EV_A_ (W)w);
3459
3460 if (!signals [w->signum - 1].head)
3461 {
3462#if EV_MULTIPLICITY
3463 signals [w->signum - 1].loop = 0; /* unattach from signal */
3464#endif
3465#if EV_USE_SIGNALFD
3466 if (sigfd >= 0)
3467 {
3468 sigset_t ss;
3469
3470 sigemptyset (&ss);
3471 sigaddset (&ss, w->signum);
3472 sigdelset (&sigfd_set, w->signum);
3473
3474 signalfd (sigfd, &sigfd_set, 0);
3475 sigprocmask (SIG_UNBLOCK, &ss, 0);
555 } 3476 }
556 else 3477 else
557 evperiodic_stop (w); /* nonrepeating: stop timer */ 3478#endif
558 3479 signal (w->signum, SIG_DFL);
559 event ((W)w, EV_TIMEOUT);
560 }
561}
562
563static void
564periodics_reschedule (ev_tstamp diff)
565{
566 int i;
567
568 /* adjust periodics after time jump */
569 for (i = 0; i < periodiccnt; ++i)
570 { 3480 }
571 struct ev_periodic *w = periodics [i];
572 3481
573 if (w->interval) 3482 EV_FREQUENT_CHECK;
3483}
3484
3485#endif
3486
3487#if EV_CHILD_ENABLE
3488
3489void
3490ev_child_start (EV_P_ ev_child *w)
3491{
3492#if EV_MULTIPLICITY
3493 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3494#endif
3495 if (expect_false (ev_is_active (w)))
3496 return;
3497
3498 EV_FREQUENT_CHECK;
3499
3500 ev_start (EV_A_ (W)w, 1);
3501 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3502
3503 EV_FREQUENT_CHECK;
3504}
3505
3506void
3507ev_child_stop (EV_P_ ev_child *w)
3508{
3509 clear_pending (EV_A_ (W)w);
3510 if (expect_false (!ev_is_active (w)))
3511 return;
3512
3513 EV_FREQUENT_CHECK;
3514
3515 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3516 ev_stop (EV_A_ (W)w);
3517
3518 EV_FREQUENT_CHECK;
3519}
3520
3521#endif
3522
3523#if EV_STAT_ENABLE
3524
3525# ifdef _WIN32
3526# undef lstat
3527# define lstat(a,b) _stati64 (a,b)
3528# endif
3529
3530#define DEF_STAT_INTERVAL 5.0074891
3531#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3532#define MIN_STAT_INTERVAL 0.1074891
3533
3534static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3535
3536#if EV_USE_INOTIFY
3537
3538/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3539# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3540
3541static void noinline
3542infy_add (EV_P_ ev_stat *w)
3543{
3544 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);
3545
3546 if (w->wd >= 0)
3547 {
3548 struct statfs sfs;
3549
3550 /* now local changes will be tracked by inotify, but remote changes won't */
3551 /* unless the filesystem is known to be local, we therefore still poll */
3552 /* also do poll on <2.6.25, but with normal frequency */
3553
3554 if (!fs_2625)
3555 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3556 else if (!statfs (w->path, &sfs)
3557 && (sfs.f_type == 0x1373 /* devfs */
3558 || sfs.f_type == 0xEF53 /* ext2/3 */
3559 || sfs.f_type == 0x3153464a /* jfs */
3560 || sfs.f_type == 0x52654973 /* reiser3 */
3561 || sfs.f_type == 0x01021994 /* tempfs */
3562 || sfs.f_type == 0x58465342 /* xfs */))
3563 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3564 else
3565 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3566 }
3567 else
3568 {
3569 /* can't use inotify, continue to stat */
3570 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3571
3572 /* if path is not there, monitor some parent directory for speedup hints */
3573 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3574 /* but an efficiency issue only */
3575 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
574 { 3576 {
575 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 3577 char path [4096];
3578 strcpy (path, w->path);
576 3579
577 if (fabs (diff) >= 1e-4) 3580 do
578 { 3581 {
579 evperiodic_stop (w); 3582 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
580 evperiodic_start (w); 3583 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
581 3584
582 i = 0; /* restart loop, inefficient, but time jumps should be rare */ 3585 char *pend = strrchr (path, '/');
3586
3587 if (!pend || pend == path)
3588 break;
3589
3590 *pend = 0;
3591 w->wd = inotify_add_watch (fs_fd, path, mask);
3592 }
3593 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3594 }
3595 }
3596
3597 if (w->wd >= 0)
3598 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3599
3600 /* now re-arm timer, if required */
3601 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3602 ev_timer_again (EV_A_ &w->timer);
3603 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3604}
3605
3606static void noinline
3607infy_del (EV_P_ ev_stat *w)
3608{
3609 int slot;
3610 int wd = w->wd;
3611
3612 if (wd < 0)
3613 return;
3614
3615 w->wd = -2;
3616 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3617 wlist_del (&fs_hash [slot].head, (WL)w);
3618
3619 /* remove this watcher, if others are watching it, they will rearm */
3620 inotify_rm_watch (fs_fd, wd);
3621}
3622
3623static void noinline
3624infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3625{
3626 if (slot < 0)
3627 /* overflow, need to check for all hash slots */
3628 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3629 infy_wd (EV_A_ slot, wd, ev);
3630 else
3631 {
3632 WL w_;
3633
3634 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3635 {
3636 ev_stat *w = (ev_stat *)w_;
3637 w_ = w_->next; /* lets us remove this watcher and all before it */
3638
3639 if (w->wd == wd || wd == -1)
3640 {
3641 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3642 {
3643 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3644 w->wd = -1;
3645 infy_add (EV_A_ w); /* re-add, no matter what */
3646 }
3647
3648 stat_timer_cb (EV_A_ &w->timer, 0);
583 } 3649 }
584 } 3650 }
585 } 3651 }
586} 3652}
587 3653
588static void 3654static void
589time_update (void) 3655infy_cb (EV_P_ ev_io *w, int revents)
590{ 3656{
3657 char buf [EV_INOTIFY_BUFSIZE];
591 int i; 3658 int ofs;
3659 int len = read (fs_fd, buf, sizeof (buf));
592 3660
593 ev_now = ev_time (); 3661 for (ofs = 0; ofs < len; )
594 3662 {
595 if (have_monotonic) 3663 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3664 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3665 ofs += sizeof (struct inotify_event) + ev->len;
596 { 3666 }
597 ev_tstamp odiff = diff; 3667}
598 3668
599 for (i = 4; --i; ) /* loop a few times, before making important decisions */ 3669inline_size void ecb_cold
3670ev_check_2625 (EV_P)
3671{
3672 /* kernels < 2.6.25 are borked
3673 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3674 */
3675 if (ev_linux_version () < 0x020619)
3676 return;
3677
3678 fs_2625 = 1;
3679}
3680
3681inline_size int
3682infy_newfd (void)
3683{
3684#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3685 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3686 if (fd >= 0)
3687 return fd;
3688#endif
3689 return inotify_init ();
3690}
3691
3692inline_size void
3693infy_init (EV_P)
3694{
3695 if (fs_fd != -2)
3696 return;
3697
3698 fs_fd = -1;
3699
3700 ev_check_2625 (EV_A);
3701
3702 fs_fd = infy_newfd ();
3703
3704 if (fs_fd >= 0)
3705 {
3706 fd_intern (fs_fd);
3707 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3708 ev_set_priority (&fs_w, EV_MAXPRI);
3709 ev_io_start (EV_A_ &fs_w);
3710 ev_unref (EV_A);
3711 }
3712}
3713
3714inline_size void
3715infy_fork (EV_P)
3716{
3717 int slot;
3718
3719 if (fs_fd < 0)
3720 return;
3721
3722 ev_ref (EV_A);
3723 ev_io_stop (EV_A_ &fs_w);
3724 close (fs_fd);
3725 fs_fd = infy_newfd ();
3726
3727 if (fs_fd >= 0)
3728 {
3729 fd_intern (fs_fd);
3730 ev_io_set (&fs_w, fs_fd, EV_READ);
3731 ev_io_start (EV_A_ &fs_w);
3732 ev_unref (EV_A);
3733 }
3734
3735 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3736 {
3737 WL w_ = fs_hash [slot].head;
3738 fs_hash [slot].head = 0;
3739
3740 while (w_)
600 { 3741 {
601 now = get_clock (); 3742 ev_stat *w = (ev_stat *)w_;
602 diff = ev_now - now; 3743 w_ = w_->next; /* lets us add this watcher */
603 3744
604 if (fabs (odiff - diff) < MIN_TIMEJUMP) 3745 w->wd = -1;
605 return; /* all is well */
606 3746
607 ev_now = ev_time (); 3747 if (fs_fd >= 0)
3748 infy_add (EV_A_ w); /* re-add, no matter what */
3749 else
3750 {
3751 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3752 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3753 ev_timer_again (EV_A_ &w->timer);
3754 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3755 }
608 } 3756 }
609
610 periodics_reschedule (diff - odiff);
611 /* no timer adjustment, as the monotonic clock doesn't jump */
612 } 3757 }
3758}
3759
3760#endif
3761
3762#ifdef _WIN32
3763# define EV_LSTAT(p,b) _stati64 (p, b)
3764#else
3765# define EV_LSTAT(p,b) lstat (p, b)
3766#endif
3767
3768void
3769ev_stat_stat (EV_P_ ev_stat *w)
3770{
3771 if (lstat (w->path, &w->attr) < 0)
3772 w->attr.st_nlink = 0;
3773 else if (!w->attr.st_nlink)
3774 w->attr.st_nlink = 1;
3775}
3776
3777static void noinline
3778stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3779{
3780 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3781
3782 ev_statdata prev = w->attr;
3783 ev_stat_stat (EV_A_ w);
3784
3785 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3786 if (
3787 prev.st_dev != w->attr.st_dev
3788 || prev.st_ino != w->attr.st_ino
3789 || prev.st_mode != w->attr.st_mode
3790 || prev.st_nlink != w->attr.st_nlink
3791 || prev.st_uid != w->attr.st_uid
3792 || prev.st_gid != w->attr.st_gid
3793 || prev.st_rdev != w->attr.st_rdev
3794 || prev.st_size != w->attr.st_size
3795 || prev.st_atime != w->attr.st_atime
3796 || prev.st_mtime != w->attr.st_mtime
3797 || prev.st_ctime != w->attr.st_ctime
3798 ) {
3799 /* we only update w->prev on actual differences */
3800 /* in case we test more often than invoke the callback, */
3801 /* to ensure that prev is always different to attr */
3802 w->prev = prev;
3803
3804 #if EV_USE_INOTIFY
3805 if (fs_fd >= 0)
3806 {
3807 infy_del (EV_A_ w);
3808 infy_add (EV_A_ w);
3809 ev_stat_stat (EV_A_ w); /* avoid race... */
3810 }
3811 #endif
3812
3813 ev_feed_event (EV_A_ w, EV_STAT);
3814 }
3815}
3816
3817void
3818ev_stat_start (EV_P_ ev_stat *w)
3819{
3820 if (expect_false (ev_is_active (w)))
3821 return;
3822
3823 ev_stat_stat (EV_A_ w);
3824
3825 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3826 w->interval = MIN_STAT_INTERVAL;
3827
3828 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3829 ev_set_priority (&w->timer, ev_priority (w));
3830
3831#if EV_USE_INOTIFY
3832 infy_init (EV_A);
3833
3834 if (fs_fd >= 0)
3835 infy_add (EV_A_ w);
613 else 3836 else
3837#endif
3838 {
3839 ev_timer_again (EV_A_ &w->timer);
3840 ev_unref (EV_A);
614 { 3841 }
615 if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP) 3842
3843 ev_start (EV_A_ (W)w, 1);
3844
3845 EV_FREQUENT_CHECK;
3846}
3847
3848void
3849ev_stat_stop (EV_P_ ev_stat *w)
3850{
3851 clear_pending (EV_A_ (W)w);
3852 if (expect_false (!ev_is_active (w)))
3853 return;
3854
3855 EV_FREQUENT_CHECK;
3856
3857#if EV_USE_INOTIFY
3858 infy_del (EV_A_ w);
3859#endif
3860
3861 if (ev_is_active (&w->timer))
3862 {
3863 ev_ref (EV_A);
3864 ev_timer_stop (EV_A_ &w->timer);
3865 }
3866
3867 ev_stop (EV_A_ (W)w);
3868
3869 EV_FREQUENT_CHECK;
3870}
3871#endif
3872
3873#if EV_IDLE_ENABLE
3874void
3875ev_idle_start (EV_P_ ev_idle *w)
3876{
3877 if (expect_false (ev_is_active (w)))
3878 return;
3879
3880 pri_adjust (EV_A_ (W)w);
3881
3882 EV_FREQUENT_CHECK;
3883
3884 {
3885 int active = ++idlecnt [ABSPRI (w)];
3886
3887 ++idleall;
3888 ev_start (EV_A_ (W)w, active);
3889
3890 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3891 idles [ABSPRI (w)][active - 1] = w;
3892 }
3893
3894 EV_FREQUENT_CHECK;
3895}
3896
3897void
3898ev_idle_stop (EV_P_ ev_idle *w)
3899{
3900 clear_pending (EV_A_ (W)w);
3901 if (expect_false (!ev_is_active (w)))
3902 return;
3903
3904 EV_FREQUENT_CHECK;
3905
3906 {
3907 int active = ev_active (w);
3908
3909 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3910 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3911
3912 ev_stop (EV_A_ (W)w);
3913 --idleall;
3914 }
3915
3916 EV_FREQUENT_CHECK;
3917}
3918#endif
3919
3920#if EV_PREPARE_ENABLE
3921void
3922ev_prepare_start (EV_P_ ev_prepare *w)
3923{
3924 if (expect_false (ev_is_active (w)))
3925 return;
3926
3927 EV_FREQUENT_CHECK;
3928
3929 ev_start (EV_A_ (W)w, ++preparecnt);
3930 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3931 prepares [preparecnt - 1] = w;
3932
3933 EV_FREQUENT_CHECK;
3934}
3935
3936void
3937ev_prepare_stop (EV_P_ ev_prepare *w)
3938{
3939 clear_pending (EV_A_ (W)w);
3940 if (expect_false (!ev_is_active (w)))
3941 return;
3942
3943 EV_FREQUENT_CHECK;
3944
3945 {
3946 int active = ev_active (w);
3947
3948 prepares [active - 1] = prepares [--preparecnt];
3949 ev_active (prepares [active - 1]) = active;
3950 }
3951
3952 ev_stop (EV_A_ (W)w);
3953
3954 EV_FREQUENT_CHECK;
3955}
3956#endif
3957
3958#if EV_CHECK_ENABLE
3959void
3960ev_check_start (EV_P_ ev_check *w)
3961{
3962 if (expect_false (ev_is_active (w)))
3963 return;
3964
3965 EV_FREQUENT_CHECK;
3966
3967 ev_start (EV_A_ (W)w, ++checkcnt);
3968 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3969 checks [checkcnt - 1] = w;
3970
3971 EV_FREQUENT_CHECK;
3972}
3973
3974void
3975ev_check_stop (EV_P_ ev_check *w)
3976{
3977 clear_pending (EV_A_ (W)w);
3978 if (expect_false (!ev_is_active (w)))
3979 return;
3980
3981 EV_FREQUENT_CHECK;
3982
3983 {
3984 int active = ev_active (w);
3985
3986 checks [active - 1] = checks [--checkcnt];
3987 ev_active (checks [active - 1]) = active;
3988 }
3989
3990 ev_stop (EV_A_ (W)w);
3991
3992 EV_FREQUENT_CHECK;
3993}
3994#endif
3995
3996#if EV_EMBED_ENABLE
3997void noinline
3998ev_embed_sweep (EV_P_ ev_embed *w)
3999{
4000 ev_run (w->other, EVRUN_NOWAIT);
4001}
4002
4003static void
4004embed_io_cb (EV_P_ ev_io *io, int revents)
4005{
4006 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
4007
4008 if (ev_cb (w))
4009 ev_feed_event (EV_A_ (W)w, EV_EMBED);
4010 else
4011 ev_run (w->other, EVRUN_NOWAIT);
4012}
4013
4014static void
4015embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4016{
4017 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4018
4019 {
4020 EV_P = w->other;
4021
4022 while (fdchangecnt)
616 { 4023 {
617 periodics_reschedule (ev_now - now); 4024 fd_reify (EV_A);
618 4025 ev_run (EV_A_ EVRUN_NOWAIT);
619 /* adjust timers. this is easy, as the offset is the same for all */
620 for (i = 0; i < timercnt; ++i)
621 timers [i]->at += diff;
622 } 4026 }
623
624 now = ev_now;
625 } 4027 }
626} 4028}
627 4029
628int ev_loop_done; 4030static void
629 4031embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
630void ev_loop (int flags)
631{ 4032{
632 double block; 4033 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
633 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
634 4034
635 do 4035 ev_embed_stop (EV_A_ w);
4036
636 { 4037 {
637 /* queue check watchers (and execute them) */ 4038 EV_P = w->other;
638 if (preparecnt)
639 {
640 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
641 call_pending ();
642 }
643 4039
644 /* update fd-related kernel structures */ 4040 ev_loop_fork (EV_A);
645 fd_reify (); 4041 ev_run (EV_A_ EVRUN_NOWAIT);
646
647 /* calculate blocking time */
648
649 /* we only need this for !monotonic clockor timers, but as we basically
650 always have timers, we just calculate it always */
651 ev_now = ev_time ();
652
653 if (flags & EVLOOP_NONBLOCK || idlecnt)
654 block = 0.;
655 else
656 {
657 block = MAX_BLOCKTIME;
658
659 if (timercnt)
660 {
661 ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
662 if (block > to) block = to;
663 }
664
665 if (periodiccnt)
666 {
667 ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
668 if (block > to) block = to;
669 }
670
671 if (block < 0.) block = 0.;
672 }
673
674 method_poll (block);
675
676 /* update ev_now, do magic */
677 time_update ();
678
679 /* queue pending timers and reschedule them */
680 timers_reify (); /* relative timers called last */
681 periodics_reify (); /* absolute timers called first */
682
683 /* queue idle watchers unless io or timers are pending */
684 if (!pendingcnt)
685 queue_events ((W *)idles, idlecnt, EV_IDLE);
686
687 /* queue check watchers, to be executed first */
688 if (checkcnt)
689 queue_events ((W *)checks, checkcnt, EV_CHECK);
690
691 call_pending ();
692 } 4042 }
693 while (!ev_loop_done);
694 4043
695 if (ev_loop_done != 2) 4044 ev_embed_start (EV_A_ w);
696 ev_loop_done = 0;
697} 4045}
4046
4047#if 0
4048static void
4049embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4050{
4051 ev_idle_stop (EV_A_ idle);
4052}
4053#endif
4054
4055void
4056ev_embed_start (EV_P_ ev_embed *w)
4057{
4058 if (expect_false (ev_is_active (w)))
4059 return;
4060
4061 {
4062 EV_P = w->other;
4063 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4064 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4065 }
4066
4067 EV_FREQUENT_CHECK;
4068
4069 ev_set_priority (&w->io, ev_priority (w));
4070 ev_io_start (EV_A_ &w->io);
4071
4072 ev_prepare_init (&w->prepare, embed_prepare_cb);
4073 ev_set_priority (&w->prepare, EV_MINPRI);
4074 ev_prepare_start (EV_A_ &w->prepare);
4075
4076 ev_fork_init (&w->fork, embed_fork_cb);
4077 ev_fork_start (EV_A_ &w->fork);
4078
4079 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4080
4081 ev_start (EV_A_ (W)w, 1);
4082
4083 EV_FREQUENT_CHECK;
4084}
4085
4086void
4087ev_embed_stop (EV_P_ ev_embed *w)
4088{
4089 clear_pending (EV_A_ (W)w);
4090 if (expect_false (!ev_is_active (w)))
4091 return;
4092
4093 EV_FREQUENT_CHECK;
4094
4095 ev_io_stop (EV_A_ &w->io);
4096 ev_prepare_stop (EV_A_ &w->prepare);
4097 ev_fork_stop (EV_A_ &w->fork);
4098
4099 ev_stop (EV_A_ (W)w);
4100
4101 EV_FREQUENT_CHECK;
4102}
4103#endif
4104
4105#if EV_FORK_ENABLE
4106void
4107ev_fork_start (EV_P_ ev_fork *w)
4108{
4109 if (expect_false (ev_is_active (w)))
4110 return;
4111
4112 EV_FREQUENT_CHECK;
4113
4114 ev_start (EV_A_ (W)w, ++forkcnt);
4115 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4116 forks [forkcnt - 1] = w;
4117
4118 EV_FREQUENT_CHECK;
4119}
4120
4121void
4122ev_fork_stop (EV_P_ ev_fork *w)
4123{
4124 clear_pending (EV_A_ (W)w);
4125 if (expect_false (!ev_is_active (w)))
4126 return;
4127
4128 EV_FREQUENT_CHECK;
4129
4130 {
4131 int active = ev_active (w);
4132
4133 forks [active - 1] = forks [--forkcnt];
4134 ev_active (forks [active - 1]) = active;
4135 }
4136
4137 ev_stop (EV_A_ (W)w);
4138
4139 EV_FREQUENT_CHECK;
4140}
4141#endif
4142
4143#if EV_CLEANUP_ENABLE
4144void
4145ev_cleanup_start (EV_P_ ev_cleanup *w)
4146{
4147 if (expect_false (ev_is_active (w)))
4148 return;
4149
4150 EV_FREQUENT_CHECK;
4151
4152 ev_start (EV_A_ (W)w, ++cleanupcnt);
4153 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4154 cleanups [cleanupcnt - 1] = w;
4155
4156 /* cleanup watchers should never keep a refcount on the loop */
4157 ev_unref (EV_A);
4158 EV_FREQUENT_CHECK;
4159}
4160
4161void
4162ev_cleanup_stop (EV_P_ ev_cleanup *w)
4163{
4164 clear_pending (EV_A_ (W)w);
4165 if (expect_false (!ev_is_active (w)))
4166 return;
4167
4168 EV_FREQUENT_CHECK;
4169 ev_ref (EV_A);
4170
4171 {
4172 int active = ev_active (w);
4173
4174 cleanups [active - 1] = cleanups [--cleanupcnt];
4175 ev_active (cleanups [active - 1]) = active;
4176 }
4177
4178 ev_stop (EV_A_ (W)w);
4179
4180 EV_FREQUENT_CHECK;
4181}
4182#endif
4183
4184#if EV_ASYNC_ENABLE
4185void
4186ev_async_start (EV_P_ ev_async *w)
4187{
4188 if (expect_false (ev_is_active (w)))
4189 return;
4190
4191 w->sent = 0;
4192
4193 evpipe_init (EV_A);
4194
4195 EV_FREQUENT_CHECK;
4196
4197 ev_start (EV_A_ (W)w, ++asynccnt);
4198 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4199 asyncs [asynccnt - 1] = w;
4200
4201 EV_FREQUENT_CHECK;
4202}
4203
4204void
4205ev_async_stop (EV_P_ ev_async *w)
4206{
4207 clear_pending (EV_A_ (W)w);
4208 if (expect_false (!ev_is_active (w)))
4209 return;
4210
4211 EV_FREQUENT_CHECK;
4212
4213 {
4214 int active = ev_active (w);
4215
4216 asyncs [active - 1] = asyncs [--asynccnt];
4217 ev_active (asyncs [active - 1]) = active;
4218 }
4219
4220 ev_stop (EV_A_ (W)w);
4221
4222 EV_FREQUENT_CHECK;
4223}
4224
4225void
4226ev_async_send (EV_P_ ev_async *w)
4227{
4228 w->sent = 1;
4229 evpipe_write (EV_A_ &async_pending);
4230}
4231#endif
698 4232
699/*****************************************************************************/ 4233/*****************************************************************************/
700 4234
701static void
702wlist_add (WL *head, WL elem)
703{
704 elem->next = *head;
705 *head = elem;
706}
707
708static void
709wlist_del (WL *head, WL elem)
710{
711 while (*head)
712 {
713 if (*head == elem)
714 {
715 *head = elem->next;
716 return;
717 }
718
719 head = &(*head)->next;
720 }
721}
722
723static void
724ev_clear (W w)
725{
726 if (w->pending)
727 {
728 pendings [w->pending - 1].w = 0;
729 w->pending = 0;
730 }
731}
732
733static void
734ev_start (W w, int active)
735{
736 w->active = active;
737}
738
739static void
740ev_stop (W w)
741{
742 w->active = 0;
743}
744
745/*****************************************************************************/
746
747void
748evio_start (struct ev_io *w)
749{
750 if (ev_is_active (w))
751 return;
752
753 int fd = w->fd;
754
755 ev_start ((W)w, 1);
756 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
757 wlist_add ((WL *)&anfds[fd].head, (WL)w);
758
759 fd_change (fd);
760}
761
762void
763evio_stop (struct ev_io *w)
764{
765 ev_clear ((W)w);
766 if (!ev_is_active (w))
767 return;
768
769 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
770 ev_stop ((W)w);
771
772 fd_change (w->fd);
773}
774
775void
776evtimer_start (struct ev_timer *w)
777{
778 if (ev_is_active (w))
779 return;
780
781 w->at += now;
782
783 assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));
784
785 ev_start ((W)w, ++timercnt);
786 array_needsize (timers, timermax, timercnt, );
787 timers [timercnt - 1] = w;
788 upheap ((WT *)timers, timercnt - 1);
789}
790
791void
792evtimer_stop (struct ev_timer *w)
793{
794 ev_clear ((W)w);
795 if (!ev_is_active (w))
796 return;
797
798 if (w->active < timercnt--)
799 {
800 timers [w->active - 1] = timers [timercnt];
801 downheap ((WT *)timers, timercnt, w->active - 1);
802 }
803
804 w->at = w->repeat;
805
806 ev_stop ((W)w);
807}
808
809void
810evtimer_again (struct ev_timer *w)
811{
812 if (ev_is_active (w))
813 {
814 if (w->repeat)
815 {
816 w->at = now + w->repeat;
817 downheap ((WT *)timers, timercnt, w->active - 1);
818 }
819 else
820 evtimer_stop (w);
821 }
822 else if (w->repeat)
823 evtimer_start (w);
824}
825
826void
827evperiodic_start (struct ev_periodic *w)
828{
829 if (ev_is_active (w))
830 return;
831
832 assert (("periodic interval value less than zero not allowed", w->interval >= 0.));
833
834 /* this formula differs from the one in periodic_reify because we do not always round up */
835 if (w->interval)
836 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
837
838 ev_start ((W)w, ++periodiccnt);
839 array_needsize (periodics, periodicmax, periodiccnt, );
840 periodics [periodiccnt - 1] = w;
841 upheap ((WT *)periodics, periodiccnt - 1);
842}
843
844void
845evperiodic_stop (struct ev_periodic *w)
846{
847 ev_clear ((W)w);
848 if (!ev_is_active (w))
849 return;
850
851 if (w->active < periodiccnt--)
852 {
853 periodics [w->active - 1] = periodics [periodiccnt];
854 downheap ((WT *)periodics, periodiccnt, w->active - 1);
855 }
856
857 ev_stop ((W)w);
858}
859
860void
861evsignal_start (struct ev_signal *w)
862{
863 if (ev_is_active (w))
864 return;
865
866 ev_start ((W)w, 1);
867 array_needsize (signals, signalmax, w->signum, signals_init);
868 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
869
870 if (!w->next)
871 {
872 struct sigaction sa;
873 sa.sa_handler = sighandler;
874 sigfillset (&sa.sa_mask);
875 sa.sa_flags = 0;
876 sigaction (w->signum, &sa, 0);
877 }
878}
879
880void
881evsignal_stop (struct ev_signal *w)
882{
883 ev_clear ((W)w);
884 if (!ev_is_active (w))
885 return;
886
887 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
888 ev_stop ((W)w);
889
890 if (!signals [w->signum - 1].head)
891 signal (w->signum, SIG_DFL);
892}
893
894void evidle_start (struct ev_idle *w)
895{
896 if (ev_is_active (w))
897 return;
898
899 ev_start ((W)w, ++idlecnt);
900 array_needsize (idles, idlemax, idlecnt, );
901 idles [idlecnt - 1] = w;
902}
903
904void evidle_stop (struct ev_idle *w)
905{
906 ev_clear ((W)w);
907 if (ev_is_active (w))
908 return;
909
910 idles [w->active - 1] = idles [--idlecnt];
911 ev_stop ((W)w);
912}
913
914void evprepare_start (struct ev_prepare *w)
915{
916 if (ev_is_active (w))
917 return;
918
919 ev_start ((W)w, ++preparecnt);
920 array_needsize (prepares, preparemax, preparecnt, );
921 prepares [preparecnt - 1] = w;
922}
923
924void evprepare_stop (struct ev_prepare *w)
925{
926 ev_clear ((W)w);
927 if (ev_is_active (w))
928 return;
929
930 prepares [w->active - 1] = prepares [--preparecnt];
931 ev_stop ((W)w);
932}
933
934void evcheck_start (struct ev_check *w)
935{
936 if (ev_is_active (w))
937 return;
938
939 ev_start ((W)w, ++checkcnt);
940 array_needsize (checks, checkmax, checkcnt, );
941 checks [checkcnt - 1] = w;
942}
943
944void evcheck_stop (struct ev_check *w)
945{
946 ev_clear ((W)w);
947 if (ev_is_active (w))
948 return;
949
950 checks [w->active - 1] = checks [--checkcnt];
951 ev_stop ((W)w);
952}
953
954void evchild_start (struct ev_child *w)
955{
956 if (ev_is_active (w))
957 return;
958
959 ev_start ((W)w, 1);
960 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
961}
962
963void evchild_stop (struct ev_child *w)
964{
965 ev_clear ((W)w);
966 if (ev_is_active (w))
967 return;
968
969 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
970 ev_stop ((W)w);
971}
972
973/*****************************************************************************/
974
975struct ev_once 4235struct ev_once
976{ 4236{
977 struct ev_io io; 4237 ev_io io;
978 struct ev_timer to; 4238 ev_timer to;
979 void (*cb)(int revents, void *arg); 4239 void (*cb)(int revents, void *arg);
980 void *arg; 4240 void *arg;
981}; 4241};
982 4242
983static void 4243static void
984once_cb (struct ev_once *once, int revents) 4244once_cb (EV_P_ struct ev_once *once, int revents)
985{ 4245{
986 void (*cb)(int revents, void *arg) = once->cb; 4246 void (*cb)(int revents, void *arg) = once->cb;
987 void *arg = once->arg; 4247 void *arg = once->arg;
988 4248
989 evio_stop (&once->io); 4249 ev_io_stop (EV_A_ &once->io);
990 evtimer_stop (&once->to); 4250 ev_timer_stop (EV_A_ &once->to);
991 free (once); 4251 ev_free (once);
992 4252
993 cb (revents, arg); 4253 cb (revents, arg);
994} 4254}
995 4255
996static void 4256static void
997once_cb_io (struct ev_io *w, int revents) 4257once_cb_io (EV_P_ ev_io *w, int revents)
998{ 4258{
999 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4259 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4260
4261 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1000} 4262}
1001 4263
1002static void 4264static void
1003once_cb_to (struct ev_timer *w, int revents) 4265once_cb_to (EV_P_ ev_timer *w, int revents)
1004{ 4266{
1005 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4267 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4268
4269 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1006} 4270}
1007 4271
1008void 4272void
1009ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4273ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1010{ 4274{
1011 struct ev_once *once = malloc (sizeof (struct ev_once)); 4275 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1012 4276
1013 if (!once) 4277 if (expect_false (!once))
1014 cb (EV_ERROR, arg); 4278 {
1015 else 4279 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
4280 return;
1016 { 4281 }
4282
1017 once->cb = cb; 4283 once->cb = cb;
1018 once->arg = arg; 4284 once->arg = arg;
1019 4285
1020 evw_init (&once->io, once_cb_io); 4286 ev_init (&once->io, once_cb_io);
1021
1022 if (fd >= 0) 4287 if (fd >= 0)
4288 {
4289 ev_io_set (&once->io, fd, events);
4290 ev_io_start (EV_A_ &once->io);
4291 }
4292
4293 ev_init (&once->to, once_cb_to);
4294 if (timeout >= 0.)
4295 {
4296 ev_timer_set (&once->to, timeout, 0.);
4297 ev_timer_start (EV_A_ &once->to);
4298 }
4299}
4300
4301/*****************************************************************************/
4302
4303#if EV_WALK_ENABLE
4304void ecb_cold
4305ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
4306{
4307 int i, j;
4308 ev_watcher_list *wl, *wn;
4309
4310 if (types & (EV_IO | EV_EMBED))
4311 for (i = 0; i < anfdmax; ++i)
4312 for (wl = anfds [i].head; wl; )
1023 { 4313 {
1024 evio_set (&once->io, fd, events); 4314 wn = wl->next;
1025 evio_start (&once->io); 4315
4316#if EV_EMBED_ENABLE
4317 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4318 {
4319 if (types & EV_EMBED)
4320 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4321 }
4322 else
4323#endif
4324#if EV_USE_INOTIFY
4325 if (ev_cb ((ev_io *)wl) == infy_cb)
4326 ;
4327 else
4328#endif
4329 if ((ev_io *)wl != &pipe_w)
4330 if (types & EV_IO)
4331 cb (EV_A_ EV_IO, wl);
4332
4333 wl = wn;
1026 } 4334 }
1027 4335
1028 evw_init (&once->to, once_cb_to); 4336 if (types & (EV_TIMER | EV_STAT))
1029 4337 for (i = timercnt + HEAP0; i-- > HEAP0; )
1030 if (timeout >= 0.) 4338#if EV_STAT_ENABLE
4339 /*TODO: timer is not always active*/
4340 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1031 { 4341 {
1032 evtimer_set (&once->to, timeout, 0.); 4342 if (types & EV_STAT)
1033 evtimer_start (&once->to); 4343 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1034 } 4344 }
1035 } 4345 else
1036} 4346#endif
4347 if (types & EV_TIMER)
4348 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1037 4349
1038/*****************************************************************************/ 4350#if EV_PERIODIC_ENABLE
4351 if (types & EV_PERIODIC)
4352 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4353 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4354#endif
1039 4355
1040#if 0 4356#if EV_IDLE_ENABLE
4357 if (types & EV_IDLE)
4358 for (j = NUMPRI; j--; )
4359 for (i = idlecnt [j]; i--; )
4360 cb (EV_A_ EV_IDLE, idles [j][i]);
4361#endif
1041 4362
1042struct ev_io wio; 4363#if EV_FORK_ENABLE
4364 if (types & EV_FORK)
4365 for (i = forkcnt; i--; )
4366 if (ev_cb (forks [i]) != embed_fork_cb)
4367 cb (EV_A_ EV_FORK, forks [i]);
4368#endif
1043 4369
1044static void 4370#if EV_ASYNC_ENABLE
1045sin_cb (struct ev_io *w, int revents) 4371 if (types & EV_ASYNC)
1046{ 4372 for (i = asynccnt; i--; )
1047 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 4373 cb (EV_A_ EV_ASYNC, asyncs [i]);
1048} 4374#endif
1049 4375
1050static void 4376#if EV_PREPARE_ENABLE
1051ocb (struct ev_timer *w, int revents) 4377 if (types & EV_PREPARE)
1052{ 4378 for (i = preparecnt; i--; )
1053 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 4379# if EV_EMBED_ENABLE
1054 evtimer_stop (w); 4380 if (ev_cb (prepares [i]) != embed_prepare_cb)
1055 evtimer_start (w);
1056}
1057
1058static void
1059scb (struct ev_signal *w, int revents)
1060{
1061 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1062 evio_stop (&wio);
1063 evio_start (&wio);
1064}
1065
1066static void
1067gcb (struct ev_signal *w, int revents)
1068{
1069 fprintf (stderr, "generic %x\n", revents);
1070
1071}
1072
1073int main (void)
1074{
1075 ev_init (0);
1076
1077 evio_init (&wio, sin_cb, 0, EV_READ);
1078 evio_start (&wio);
1079
1080 struct ev_timer t[10000];
1081
1082#if 0
1083 int i;
1084 for (i = 0; i < 10000; ++i)
1085 {
1086 struct ev_timer *w = t + i;
1087 evw_init (w, ocb, i);
1088 evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1089 evtimer_start (w);
1090 if (drand48 () < 0.5)
1091 evtimer_stop (w);
1092 }
1093#endif 4381# endif
1094 4382 cb (EV_A_ EV_PREPARE, prepares [i]);
1095 struct ev_timer t1;
1096 evtimer_init (&t1, ocb, 5, 10);
1097 evtimer_start (&t1);
1098
1099 struct ev_signal sig;
1100 evsignal_init (&sig, scb, SIGQUIT);
1101 evsignal_start (&sig);
1102
1103 struct ev_check cw;
1104 evcheck_init (&cw, gcb);
1105 evcheck_start (&cw);
1106
1107 struct ev_idle iw;
1108 evidle_init (&iw, gcb);
1109 evidle_start (&iw);
1110
1111 ev_loop (0);
1112
1113 return 0;
1114}
1115
1116#endif 4383#endif
1117 4384
4385#if EV_CHECK_ENABLE
4386 if (types & EV_CHECK)
4387 for (i = checkcnt; i--; )
4388 cb (EV_A_ EV_CHECK, checks [i]);
4389#endif
1118 4390
4391#if EV_SIGNAL_ENABLE
4392 if (types & EV_SIGNAL)
4393 for (i = 0; i < EV_NSIG - 1; ++i)
4394 for (wl = signals [i].head; wl; )
4395 {
4396 wn = wl->next;
4397 cb (EV_A_ EV_SIGNAL, wl);
4398 wl = wn;
4399 }
4400#endif
1119 4401
4402#if EV_CHILD_ENABLE
4403 if (types & EV_CHILD)
4404 for (i = (EV_PID_HASHSIZE); i--; )
4405 for (wl = childs [i]; wl; )
4406 {
4407 wn = wl->next;
4408 cb (EV_A_ EV_CHILD, wl);
4409 wl = wn;
4410 }
4411#endif
4412/* EV_STAT 0x00001000 /* stat data changed */
4413/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4414}
4415#endif
1120 4416
4417#if EV_MULTIPLICITY
4418 #include "ev_wrap.h"
4419#endif
4420
4421EV_CPP(})
4422

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