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Comparing libev/ev.c (file contents):
Revision 1.43 by root, Fri Nov 2 20:21:33 2007 UTC vs.
Revision 1.379 by root, Sun Jun 19 17:55:13 2011 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met:
10 * 9 *
11 * * Redistributions of source code must retain the above copyright 10 * 1. Redistributions of source code must retain the above copyright notice,
12 * notice, this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
13 * 12 *
14 * * Redistributions in binary form must reproduce the above 13 * 2. Redistributions in binary form must reproduce the above copyright
15 * copyright notice, this list of conditions and the following 14 * notice, this list of conditions and the following disclaimer in the
16 * disclaimer in the documentation and/or other materials provided 15 * documentation and/or other materials provided with the distribution.
17 * with the distribution.
18 * 16 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Alternatively, the contents of this file may be used under the terms of
29 * the GNU General Public License ("GPL") version 2 or any later version,
30 * in which case the provisions of the GPL are applicable instead of
31 * the above. If you wish to allow the use of your version of this file
32 * only under the terms of the GPL and not to allow others to use your
33 * version of this file under the BSD license, indicate your decision
34 * by deleting the provisions above and replace them with the notice
35 * and other provisions required by the GPL. If you do not delete the
36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL.
30 */ 38 */
39
40/* this big block deduces configuration from config.h */
41#ifndef EV_STANDALONE
31#if EV_USE_CONFIG_H 42# ifdef EV_CONFIG_H
43# include EV_CONFIG_H
44# else
32# include "config.h" 45# include "config.h"
33#endif 46# endif
34 47
35#include <math.h> 48#if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52#endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined(EV_USE_CLOCK_SYSCALL)
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
67
68# if HAVE_CLOCK_GETTIME
69# ifndef EV_USE_MONOTONIC
70# define EV_USE_MONOTONIC 1
71# endif
72# ifndef EV_USE_REALTIME
73# define EV_USE_REALTIME 0
74# endif
75# else
76# ifndef EV_USE_MONOTONIC
77# define EV_USE_MONOTONIC 0
78# endif
79# ifndef EV_USE_REALTIME
80# define EV_USE_REALTIME 0
81# endif
82# endif
83
84# if HAVE_NANOSLEEP
85# ifndef EV_USE_NANOSLEEP
86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
88# else
89# undef EV_USE_NANOSLEEP
90# define EV_USE_NANOSLEEP 0
91# endif
92
93# if HAVE_SELECT && HAVE_SYS_SELECT_H
94# ifndef EV_USE_SELECT
95# define EV_USE_SELECT EV_FEATURE_BACKENDS
96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
100# endif
101
102# if HAVE_POLL && HAVE_POLL_H
103# ifndef EV_USE_POLL
104# define EV_USE_POLL EV_FEATURE_BACKENDS
105# endif
106# else
107# undef EV_USE_POLL
108# define EV_USE_POLL 0
109# endif
110
111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
112# ifndef EV_USE_EPOLL
113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
118# endif
119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
121# ifndef EV_USE_KQUEUE
122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
127# endif
128
129# if HAVE_PORT_H && HAVE_PORT_CREATE
130# ifndef EV_USE_PORT
131# define EV_USE_PORT EV_FEATURE_BACKENDS
132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
136# endif
137
138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
139# ifndef EV_USE_INOTIFY
140# define EV_USE_INOTIFY EV_FEATURE_OS
141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
145# endif
146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
148# ifndef EV_USE_SIGNALFD
149# define EV_USE_SIGNALFD EV_FEATURE_OS
150# endif
151# else
152# undef EV_USE_SIGNALFD
153# define EV_USE_SIGNALFD 0
154# endif
155
156# if HAVE_EVENTFD
157# ifndef EV_USE_EVENTFD
158# define EV_USE_EVENTFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_EVENTFD
162# define EV_USE_EVENTFD 0
163# endif
164
165#endif
166
36#include <stdlib.h> 167#include <stdlib.h>
37#include <unistd.h> 168#include <string.h>
38#include <fcntl.h> 169#include <fcntl.h>
39#include <signal.h>
40#include <stddef.h> 170#include <stddef.h>
41 171
42#include <stdio.h> 172#include <stdio.h>
43 173
44#include <assert.h> 174#include <assert.h>
45#include <errno.h> 175#include <errno.h>
46#include <sys/types.h> 176#include <sys/types.h>
47#include <sys/wait.h>
48#include <sys/time.h>
49#include <time.h> 177#include <time.h>
178#include <limits.h>
50 179
51/**/ 180#include <signal.h>
181
182#ifdef EV_H
183# include EV_H
184#else
185# include "ev.h"
186#endif
187
188EV_CPP(extern "C" {)
189
190#ifndef _WIN32
191# include <sys/time.h>
192# include <sys/wait.h>
193# include <unistd.h>
194#else
195# include <io.h>
196# define WIN32_LEAN_AND_MEAN
197# include <windows.h>
198# ifndef EV_SELECT_IS_WINSOCKET
199# define EV_SELECT_IS_WINSOCKET 1
200# endif
201# undef EV_AVOID_STDIO
202#endif
203
204/* OS X, in its infinite idiocy, actually HARDCODES
205 * a limit of 1024 into their select. Where people have brains,
206 * OS X engineers apparently have a vacuum. Or maybe they were
207 * ordered to have a vacuum, or they do anything for money.
208 * This might help. Or not.
209 */
210#define _DARWIN_UNLIMITED_SELECT 1
211
212/* this block tries to deduce configuration from header-defined symbols and defaults */
213
214/* try to deduce the maximum number of signals on this platform */
215#if defined (EV_NSIG)
216/* use what's provided */
217#elif defined (NSIG)
218# define EV_NSIG (NSIG)
219#elif defined(_NSIG)
220# define EV_NSIG (_NSIG)
221#elif defined (SIGMAX)
222# define EV_NSIG (SIGMAX+1)
223#elif defined (SIG_MAX)
224# define EV_NSIG (SIG_MAX+1)
225#elif defined (_SIG_MAX)
226# define EV_NSIG (_SIG_MAX+1)
227#elif defined (MAXSIG)
228# define EV_NSIG (MAXSIG+1)
229#elif defined (MAX_SIG)
230# define EV_NSIG (MAX_SIG+1)
231#elif defined (SIGARRAYSIZE)
232# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
233#elif defined (_sys_nsig)
234# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
235#else
236# error "unable to find value for NSIG, please report"
237/* to make it compile regardless, just remove the above line, */
238/* but consider reporting it, too! :) */
239# define EV_NSIG 65
240#endif
241
242#ifndef EV_USE_FLOOR
243# define EV_USE_FLOOR 0
244#endif
245
246#ifndef EV_USE_CLOCK_SYSCALL
247# if __linux && __GLIBC__ >= 2
248# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
249# else
250# define EV_USE_CLOCK_SYSCALL 0
251# endif
252#endif
52 253
53#ifndef EV_USE_MONOTONIC 254#ifndef EV_USE_MONOTONIC
255# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0
256# define EV_USE_MONOTONIC EV_FEATURE_OS
257# else
54# define EV_USE_MONOTONIC 1 258# define EV_USE_MONOTONIC 0
259# endif
260#endif
261
262#ifndef EV_USE_REALTIME
263# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
264#endif
265
266#ifndef EV_USE_NANOSLEEP
267# if _POSIX_C_SOURCE >= 199309L
268# define EV_USE_NANOSLEEP EV_FEATURE_OS
269# else
270# define EV_USE_NANOSLEEP 0
271# endif
55#endif 272#endif
56 273
57#ifndef EV_USE_SELECT 274#ifndef EV_USE_SELECT
58# define EV_USE_SELECT 1 275# define EV_USE_SELECT EV_FEATURE_BACKENDS
59#endif 276#endif
60 277
61#ifndef EV_USE_POLL 278#ifndef EV_USE_POLL
62# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ 279# ifdef _WIN32
280# define EV_USE_POLL 0
281# else
282# define EV_USE_POLL EV_FEATURE_BACKENDS
283# endif
63#endif 284#endif
64 285
65#ifndef EV_USE_EPOLL 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
66# define EV_USE_EPOLL 0 290# define EV_USE_EPOLL 0
67#endif 291# endif
292#endif
68 293
294#ifndef EV_USE_KQUEUE
295# define EV_USE_KQUEUE 0
296#endif
297
69#ifndef EV_USE_REALTIME 298#ifndef EV_USE_PORT
70# define EV_USE_REALTIME 1 299# 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
71#endif 307# endif
308#endif
72 309
73/**/ 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
74 373
75#ifndef CLOCK_MONOTONIC 374#ifndef CLOCK_MONOTONIC
76# undef EV_USE_MONOTONIC 375# undef EV_USE_MONOTONIC
77# define EV_USE_MONOTONIC 0 376# define EV_USE_MONOTONIC 0
78#endif 377#endif
… …
80#ifndef CLOCK_REALTIME 379#ifndef CLOCK_REALTIME
81# undef EV_USE_REALTIME 380# undef EV_USE_REALTIME
82# define EV_USE_REALTIME 0 381# define EV_USE_REALTIME 0
83#endif 382#endif
84 383
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
85/**/ 448/**/
86 449
450#if EV_VERIFY >= 3
451# define EV_FREQUENT_CHECK ev_verify (EV_A)
452#else
453# define EV_FREQUENT_CHECK do { } while (0)
454#endif
455
456/*
457 * This is used to work around floating point rounding problems.
458 * This value is good at least till the year 4000.
459 */
460#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
461/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
462
87#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) */
88#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 464#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
89#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
90/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
91 465
92#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)
93 468
94#if __GNUC__ >= 3 469/* the following are taken from libecb */
95# define expect(expr,value) __builtin_expect ((expr),(value)) 470/* ecb.h start */
96# define inline inline 471
472/* many compilers define _GNUC_ to some versions but then only implement
473 * what their idiot authors think are the "more important" extensions,
474 * causing enourmous grief in return for some better fake benchmark numbers.
475 * or so.
476 * we try to detect these and simply assume they are not gcc - if they have
477 * an issue with that they should have done it right in the first place.
478 */
479#ifndef ECB_GCC_VERSION
480 #if !defined(__GNUC_MINOR__) || defined(__INTEL_COMPILER) || defined(__SUNPRO_C) || defined(__SUNPRO_CC) || defined(__llvm__) || defined(__clang__)
481 #define ECB_GCC_VERSION(major,minor) 0
482 #else
483 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
484 #endif
485#endif
486
487#if __cplusplus
488 #define ecb_inline static inline
489#elif ECB_GCC_VERSION(2,5)
490 #define ecb_inline static __inline__
491#elif ECB_C99
492 #define ecb_inline static inline
97#else 493#else
494 #define ecb_inline static
495#endif
496
497#if ECB_GCC_VERSION(3,1)
498 #define ecb_attribute(attrlist) __attribute__(attrlist)
499 #define ecb_is_constant(expr) __builtin_constant_p (expr)
500 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
501 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
502#else
503 #define ecb_attribute(attrlist)
504 #define ecb_is_constant(expr) 0
98# define expect(expr,value) (expr) 505 #define ecb_expect(expr,value) (expr)
99# define inline static 506 #define ecb_prefetch(addr,rw,locality)
100#endif 507#endif
101 508
509#define ecb_noinline ecb_attribute ((__noinline__))
510#define ecb_noreturn ecb_attribute ((__noreturn__))
511#define ecb_unused ecb_attribute ((__unused__))
512#define ecb_const ecb_attribute ((__const__))
513#define ecb_pure ecb_attribute ((__pure__))
514
515#if ECB_GCC_VERSION(4,3)
516 #define ecb_artificial ecb_attribute ((__artificial__))
517 #define ecb_hot ecb_attribute ((__hot__))
518 #define ecb_cold ecb_attribute ((__cold__))
519#else
520 #define ecb_artificial
521 #define ecb_hot
522 #define ecb_cold
523#endif
524
525/* put around conditional expressions if you are very sure that the */
526/* expression is mostly true or mostly false. note that these return */
527/* booleans, not the expression. */
102#define expect_false(expr) expect ((expr) != 0, 0) 528#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
103#define expect_true(expr) expect ((expr) != 0, 1) 529#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
530/* ecb.h end */
104 531
532#define expect_false(cond) ecb_expect_false (cond)
533#define expect_true(cond) ecb_expect_true (cond)
534#define noinline ecb_noinline
535
536#define inline_size ecb_inline
537
538#if EV_FEATURE_CODE
539# define inline_speed ecb_inline
540#else
541# define inline_speed static noinline
542#endif
543
105#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 544#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
545
546#if EV_MINPRI == EV_MAXPRI
547# define ABSPRI(w) (((W)w), 0)
548#else
106#define ABSPRI(w) ((w)->priority - EV_MINPRI) 549# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
550#endif
107 551
552#define EMPTY /* required for microsofts broken pseudo-c compiler */
553#define EMPTY2(a,b) /* used to suppress some warnings */
554
108typedef struct ev_watcher *W; 555typedef ev_watcher *W;
109typedef struct ev_watcher_list *WL; 556typedef ev_watcher_list *WL;
110typedef struct ev_watcher_time *WT; 557typedef ev_watcher_time *WT;
111 558
112static ev_tstamp now_floor, now, diff; /* monotonic clock */ 559#define ev_active(w) ((W)(w))->active
113ev_tstamp ev_now; 560#define ev_at(w) ((WT)(w))->at
114int ev_method;
115 561
116static int have_monotonic; /* runtime */ 562#if EV_USE_REALTIME
563/* sig_atomic_t is used to avoid per-thread variables or locking but still */
564/* giving it a reasonably high chance of working on typical architectures */
565static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
566#endif
117 567
118static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */ 568#if EV_USE_MONOTONIC
119static void (*method_modify)(int fd, int oev, int nev); 569static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
120static void (*method_poll)(ev_tstamp timeout); 570#endif
571
572#ifndef EV_FD_TO_WIN32_HANDLE
573# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
574#endif
575#ifndef EV_WIN32_HANDLE_TO_FD
576# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
577#endif
578#ifndef EV_WIN32_CLOSE_FD
579# define EV_WIN32_CLOSE_FD(fd) close (fd)
580#endif
581
582#ifdef _WIN32
583# include "ev_win32.c"
584#endif
121 585
122/*****************************************************************************/ 586/*****************************************************************************/
123 587
588/* define a suitable floor function (only used by periodics atm) */
589
590#if EV_USE_FLOOR
591# include <math.h>
592# define ev_floor(v) floor (v)
593#else
594
595#include <float.h>
596
597/* a floor() replacement function, should be independent of ev_tstamp type */
598static ev_tstamp noinline
599ev_floor (ev_tstamp v)
600{
601 /* the choice of shift factor is not terribly important */
602#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
603 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
604#else
605 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
606#endif
607
608 /* argument too large for an unsigned long? */
609 if (expect_false (v >= shift))
610 {
611 ev_tstamp f;
612
613 if (v == v - 1.)
614 return v; /* very large number */
615
616 f = shift * ev_floor (v * (1. / shift));
617 return f + ev_floor (v - f);
618 }
619
620 /* special treatment for negative args? */
621 if (expect_false (v < 0.))
622 {
623 ev_tstamp f = -ev_floor (-v);
624
625 return f - (f == v ? 0 : 1);
626 }
627
628 /* fits into an unsigned long */
629 return (unsigned long)v;
630}
631
632#endif
633
634/*****************************************************************************/
635
636#ifdef __linux
637# include <sys/utsname.h>
638#endif
639
640static unsigned int noinline ecb_cold
641ev_linux_version (void)
642{
643#ifdef __linux
644 unsigned int v = 0;
645 struct utsname buf;
646 int i;
647 char *p = buf.release;
648
649 if (uname (&buf))
650 return 0;
651
652 for (i = 3+1; --i; )
653 {
654 unsigned int c = 0;
655
656 for (;;)
657 {
658 if (*p >= '0' && *p <= '9')
659 c = c * 10 + *p++ - '0';
660 else
661 {
662 p += *p == '.';
663 break;
664 }
665 }
666
667 v = (v << 8) | c;
668 }
669
670 return v;
671#else
672 return 0;
673#endif
674}
675
676/*****************************************************************************/
677
678#if EV_AVOID_STDIO
679static void noinline ecb_cold
680ev_printerr (const char *msg)
681{
682 write (STDERR_FILENO, msg, strlen (msg));
683}
684#endif
685
686static void (*syserr_cb)(const char *msg);
687
688void ecb_cold
689ev_set_syserr_cb (void (*cb)(const char *msg))
690{
691 syserr_cb = cb;
692}
693
694static void noinline ecb_cold
695ev_syserr (const char *msg)
696{
697 if (!msg)
698 msg = "(libev) system error";
699
700 if (syserr_cb)
701 syserr_cb (msg);
702 else
703 {
704#if EV_AVOID_STDIO
705 ev_printerr (msg);
706 ev_printerr (": ");
707 ev_printerr (strerror (errno));
708 ev_printerr ("\n");
709#else
710 perror (msg);
711#endif
712 abort ();
713 }
714}
715
716static void *
717ev_realloc_emul (void *ptr, long size)
718{
719#if __GLIBC__
720 return realloc (ptr, size);
721#else
722 /* some systems, notably openbsd and darwin, fail to properly
723 * implement realloc (x, 0) (as required by both ansi c-89 and
724 * the single unix specification, so work around them here.
725 */
726
727 if (size)
728 return realloc (ptr, size);
729
730 free (ptr);
731 return 0;
732#endif
733}
734
735static void *(*alloc)(void *ptr, long size) = ev_realloc_emul;
736
737void ecb_cold
738ev_set_allocator (void *(*cb)(void *ptr, long size))
739{
740 alloc = cb;
741}
742
743inline_speed void *
744ev_realloc (void *ptr, long size)
745{
746 ptr = alloc (ptr, size);
747
748 if (!ptr && size)
749 {
750#if EV_AVOID_STDIO
751 ev_printerr ("(libev) memory allocation failed, aborting.\n");
752#else
753 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
754#endif
755 abort ();
756 }
757
758 return ptr;
759}
760
761#define ev_malloc(size) ev_realloc (0, (size))
762#define ev_free(ptr) ev_realloc ((ptr), 0)
763
764/*****************************************************************************/
765
766/* set in reify when reification needed */
767#define EV_ANFD_REIFY 1
768
769/* file descriptor info structure */
770typedef struct
771{
772 WL head;
773 unsigned char events; /* the events watched for */
774 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
775 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
776 unsigned char unused;
777#if EV_USE_EPOLL
778 unsigned int egen; /* generation counter to counter epoll bugs */
779#endif
780#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
781 SOCKET handle;
782#endif
783#if EV_USE_IOCP
784 OVERLAPPED or, ow;
785#endif
786} ANFD;
787
788/* stores the pending event set for a given watcher */
789typedef struct
790{
791 W w;
792 int events; /* the pending event set for the given watcher */
793} ANPENDING;
794
795#if EV_USE_INOTIFY
796/* hash table entry per inotify-id */
797typedef struct
798{
799 WL head;
800} ANFS;
801#endif
802
803/* Heap Entry */
804#if EV_HEAP_CACHE_AT
805 /* a heap element */
806 typedef struct {
807 ev_tstamp at;
808 WT w;
809 } ANHE;
810
811 #define ANHE_w(he) (he).w /* access watcher, read-write */
812 #define ANHE_at(he) (he).at /* access cached at, read-only */
813 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
814#else
815 /* a heap element */
816 typedef WT ANHE;
817
818 #define ANHE_w(he) (he)
819 #define ANHE_at(he) (he)->at
820 #define ANHE_at_cache(he)
821#endif
822
823#if EV_MULTIPLICITY
824
825 struct ev_loop
826 {
827 ev_tstamp ev_rt_now;
828 #define ev_rt_now ((loop)->ev_rt_now)
829 #define VAR(name,decl) decl;
830 #include "ev_vars.h"
831 #undef VAR
832 };
833 #include "ev_wrap.h"
834
835 static struct ev_loop default_loop_struct;
836 struct ev_loop *ev_default_loop_ptr;
837
838#else
839
840 ev_tstamp ev_rt_now;
841 #define VAR(name,decl) static decl;
842 #include "ev_vars.h"
843 #undef VAR
844
845 static int ev_default_loop_ptr;
846
847#endif
848
849#if EV_FEATURE_API
850# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
851# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
852# define EV_INVOKE_PENDING invoke_cb (EV_A)
853#else
854# define EV_RELEASE_CB (void)0
855# define EV_ACQUIRE_CB (void)0
856# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
857#endif
858
859#define EVBREAK_RECURSE 0x80
860
861/*****************************************************************************/
862
863#ifndef EV_HAVE_EV_TIME
124ev_tstamp 864ev_tstamp
125ev_time (void) 865ev_time (void)
126{ 866{
127#if EV_USE_REALTIME 867#if EV_USE_REALTIME
868 if (expect_true (have_realtime))
869 {
128 struct timespec ts; 870 struct timespec ts;
129 clock_gettime (CLOCK_REALTIME, &ts); 871 clock_gettime (CLOCK_REALTIME, &ts);
130 return ts.tv_sec + ts.tv_nsec * 1e-9; 872 return ts.tv_sec + ts.tv_nsec * 1e-9;
131#else 873 }
874#endif
875
132 struct timeval tv; 876 struct timeval tv;
133 gettimeofday (&tv, 0); 877 gettimeofday (&tv, 0);
134 return tv.tv_sec + tv.tv_usec * 1e-6; 878 return tv.tv_sec + tv.tv_usec * 1e-6;
135#endif
136} 879}
880#endif
137 881
138static ev_tstamp 882inline_size ev_tstamp
139get_clock (void) 883get_clock (void)
140{ 884{
141#if EV_USE_MONOTONIC 885#if EV_USE_MONOTONIC
142 if (expect_true (have_monotonic)) 886 if (expect_true (have_monotonic))
143 { 887 {
… …
148#endif 892#endif
149 893
150 return ev_time (); 894 return ev_time ();
151} 895}
152 896
153#define array_roundsize(base,n) ((n) | 4 & ~3) 897#if EV_MULTIPLICITY
898ev_tstamp
899ev_now (EV_P)
900{
901 return ev_rt_now;
902}
903#endif
154 904
155#define array_needsize(base,cur,cnt,init) \ 905void
156 if (expect_false ((cnt) > cur)) \ 906ev_sleep (ev_tstamp delay)
157 { \ 907{
158 int newcnt = cur; \ 908 if (delay > 0.)
159 do \
160 { \
161 newcnt = array_roundsize (base, newcnt << 1); \
162 } \
163 while ((cnt) > newcnt); \
164 \
165 base = realloc (base, sizeof (*base) * (newcnt)); \
166 init (base + cur, newcnt - cur); \
167 cur = newcnt; \
168 } 909 {
910#if EV_USE_NANOSLEEP
911 struct timespec ts;
912
913 EV_TS_SET (ts, delay);
914 nanosleep (&ts, 0);
915#elif defined(_WIN32)
916 Sleep ((unsigned long)(delay * 1e3));
917#else
918 struct timeval tv;
919
920 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
921 /* something not guaranteed by newer posix versions, but guaranteed */
922 /* by older ones */
923 EV_TV_SET (tv, delay);
924 select (0, 0, 0, 0, &tv);
925#endif
926 }
927}
169 928
170/*****************************************************************************/ 929/*****************************************************************************/
171 930
172typedef struct 931#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
173{
174 struct ev_io *head;
175 unsigned char events;
176 unsigned char reify;
177} ANFD;
178 932
179static ANFD *anfds; 933/* find a suitable new size for the given array, */
180static int anfdmax; 934/* hopefully by rounding to a nice-to-malloc size */
181 935inline_size int
182static void 936array_nextsize (int elem, int cur, int cnt)
183anfds_init (ANFD *base, int count)
184{ 937{
185 while (count--) 938 int ncur = cur + 1;
186 {
187 base->head = 0;
188 base->events = EV_NONE;
189 base->reify = 0;
190 939
191 ++base; 940 do
941 ncur <<= 1;
942 while (cnt > ncur);
943
944 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
945 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
192 } 946 {
193} 947 ncur *= elem;
194 948 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
195typedef struct 949 ncur = ncur - sizeof (void *) * 4;
196{ 950 ncur /= elem;
197 W w;
198 int events;
199} ANPENDING;
200
201static ANPENDING *pendings [NUMPRI];
202static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
203
204static void
205event (W w, int events)
206{
207 if (w->pending)
208 { 951 }
952
953 return ncur;
954}
955
956static void * noinline ecb_cold
957array_realloc (int elem, void *base, int *cur, int cnt)
958{
959 *cur = array_nextsize (elem, *cur, cnt);
960 return ev_realloc (base, elem * *cur);
961}
962
963#define array_init_zero(base,count) \
964 memset ((void *)(base), 0, sizeof (*(base)) * (count))
965
966#define array_needsize(type,base,cur,cnt,init) \
967 if (expect_false ((cnt) > (cur))) \
968 { \
969 int ocur_ = (cur); \
970 (base) = (type *)array_realloc \
971 (sizeof (type), (base), &(cur), (cnt)); \
972 init ((base) + (ocur_), (cur) - ocur_); \
973 }
974
975#if 0
976#define array_slim(type,stem) \
977 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
978 { \
979 stem ## max = array_roundsize (stem ## cnt >> 1); \
980 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
981 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
982 }
983#endif
984
985#define array_free(stem, idx) \
986 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
987
988/*****************************************************************************/
989
990/* dummy callback for pending events */
991static void noinline
992pendingcb (EV_P_ ev_prepare *w, int revents)
993{
994}
995
996void noinline
997ev_feed_event (EV_P_ void *w, int revents)
998{
999 W w_ = (W)w;
1000 int pri = ABSPRI (w_);
1001
1002 if (expect_false (w_->pending))
1003 pendings [pri][w_->pending - 1].events |= revents;
1004 else
1005 {
1006 w_->pending = ++pendingcnt [pri];
1007 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1008 pendings [pri][w_->pending - 1].w = w_;
209 pendings [ABSPRI (w)][w->pending - 1].events |= events; 1009 pendings [pri][w_->pending - 1].events = revents;
210 return;
211 } 1010 }
212
213 w->pending = ++pendingcnt [ABSPRI (w)];
214 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
215 pendings [ABSPRI (w)][w->pending - 1].w = w;
216 pendings [ABSPRI (w)][w->pending - 1].events = events;
217} 1011}
218 1012
219static void 1013inline_speed void
1014feed_reverse (EV_P_ W w)
1015{
1016 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1017 rfeeds [rfeedcnt++] = w;
1018}
1019
1020inline_size void
1021feed_reverse_done (EV_P_ int revents)
1022{
1023 do
1024 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1025 while (rfeedcnt);
1026}
1027
1028inline_speed void
220queue_events (W *events, int eventcnt, int type) 1029queue_events (EV_P_ W *events, int eventcnt, int type)
221{ 1030{
222 int i; 1031 int i;
223 1032
224 for (i = 0; i < eventcnt; ++i) 1033 for (i = 0; i < eventcnt; ++i)
225 event (events [i], type); 1034 ev_feed_event (EV_A_ events [i], type);
226} 1035}
227 1036
228static void 1037/*****************************************************************************/
1038
1039inline_speed void
229fd_event (int fd, int events) 1040fd_event_nocheck (EV_P_ int fd, int revents)
230{ 1041{
231 ANFD *anfd = anfds + fd; 1042 ANFD *anfd = anfds + fd;
232 struct ev_io *w; 1043 ev_io *w;
233 1044
234 for (w = anfd->head; w; w = w->next) 1045 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
235 { 1046 {
236 int ev = w->events & events; 1047 int ev = w->events & revents;
237 1048
238 if (ev) 1049 if (ev)
239 event ((W)w, ev); 1050 ev_feed_event (EV_A_ (W)w, ev);
240 } 1051 }
241} 1052}
242 1053
243/*****************************************************************************/ 1054/* do not submit kernel events for fds that have reify set */
1055/* because that means they changed while we were polling for new events */
1056inline_speed void
1057fd_event (EV_P_ int fd, int revents)
1058{
1059 ANFD *anfd = anfds + fd;
244 1060
245static int *fdchanges; 1061 if (expect_true (!anfd->reify))
246static int fdchangemax, fdchangecnt; 1062 fd_event_nocheck (EV_A_ fd, revents);
1063}
247 1064
248static void 1065void
249fd_reify (void) 1066ev_feed_fd_event (EV_P_ int fd, int revents)
1067{
1068 if (fd >= 0 && fd < anfdmax)
1069 fd_event_nocheck (EV_A_ fd, revents);
1070}
1071
1072/* make sure the external fd watch events are in-sync */
1073/* with the kernel/libev internal state */
1074inline_size void
1075fd_reify (EV_P)
250{ 1076{
251 int i; 1077 int i;
252 1078
1079#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
253 for (i = 0; i < fdchangecnt; ++i) 1080 for (i = 0; i < fdchangecnt; ++i)
254 { 1081 {
255 int fd = fdchanges [i]; 1082 int fd = fdchanges [i];
256 ANFD *anfd = anfds + fd; 1083 ANFD *anfd = anfds + fd;
257 struct ev_io *w;
258 1084
259 int events = 0; 1085 if (anfd->reify & EV__IOFDSET && anfd->head)
260
261 for (w = anfd->head; w; w = w->next)
262 events |= w->events;
263
264 anfd->reify = 0;
265
266 if (anfd->events != events)
267 { 1086 {
1087 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1088
1089 if (handle != anfd->handle)
1090 {
1091 unsigned long arg;
1092
1093 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1094
1095 /* handle changed, but fd didn't - we need to do it in two steps */
268 method_modify (fd, anfd->events, events); 1096 backend_modify (EV_A_ fd, anfd->events, 0);
269 anfd->events = events; 1097 anfd->events = 0;
1098 anfd->handle = handle;
1099 }
270 } 1100 }
271 } 1101 }
1102#endif
1103
1104 for (i = 0; i < fdchangecnt; ++i)
1105 {
1106 int fd = fdchanges [i];
1107 ANFD *anfd = anfds + fd;
1108 ev_io *w;
1109
1110 unsigned char o_events = anfd->events;
1111 unsigned char o_reify = anfd->reify;
1112
1113 anfd->reify = 0;
1114
1115 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1116 {
1117 anfd->events = 0;
1118
1119 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1120 anfd->events |= (unsigned char)w->events;
1121
1122 if (o_events != anfd->events)
1123 o_reify = EV__IOFDSET; /* actually |= */
1124 }
1125
1126 if (o_reify & EV__IOFDSET)
1127 backend_modify (EV_A_ fd, o_events, anfd->events);
1128 }
272 1129
273 fdchangecnt = 0; 1130 fdchangecnt = 0;
274} 1131}
275 1132
276static void 1133/* something about the given fd changed */
277fd_change (int fd) 1134inline_size void
1135fd_change (EV_P_ int fd, int flags)
278{ 1136{
279 if (anfds [fd].reify || fdchangecnt < 0) 1137 unsigned char reify = anfds [fd].reify;
280 return;
281
282 anfds [fd].reify = 1; 1138 anfds [fd].reify |= flags;
283 1139
1140 if (expect_true (!reify))
1141 {
284 ++fdchangecnt; 1142 ++fdchangecnt;
285 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1143 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
286 fdchanges [fdchangecnt - 1] = fd; 1144 fdchanges [fdchangecnt - 1] = fd;
1145 }
287} 1146}
288 1147
289static void 1148/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1149inline_speed void ecb_cold
290fd_kill (int fd) 1150fd_kill (EV_P_ int fd)
291{ 1151{
292 struct ev_io *w; 1152 ev_io *w;
293 1153
294 printf ("killing fd %d\n", fd);//D
295 while ((w = anfds [fd].head)) 1154 while ((w = (ev_io *)anfds [fd].head))
296 { 1155 {
297 ev_io_stop (w); 1156 ev_io_stop (EV_A_ w);
298 event ((W)w, EV_ERROR | EV_READ | EV_WRITE); 1157 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
299 } 1158 }
1159}
1160
1161/* check whether the given fd is actually valid, for error recovery */
1162inline_size int ecb_cold
1163fd_valid (int fd)
1164{
1165#ifdef _WIN32
1166 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1167#else
1168 return fcntl (fd, F_GETFD) != -1;
1169#endif
300} 1170}
301 1171
302/* called on EBADF to verify fds */ 1172/* called on EBADF to verify fds */
303static void 1173static void noinline ecb_cold
304fd_ebadf (void) 1174fd_ebadf (EV_P)
305{ 1175{
306 int fd; 1176 int fd;
307 1177
308 for (fd = 0; fd < anfdmax; ++fd) 1178 for (fd = 0; fd < anfdmax; ++fd)
309 if (anfds [fd].events) 1179 if (anfds [fd].events)
310 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 1180 if (!fd_valid (fd) && errno == EBADF)
311 fd_kill (fd); 1181 fd_kill (EV_A_ fd);
312} 1182}
313 1183
314/* called on ENOMEM in select/poll to kill some fds and retry */ 1184/* called on ENOMEM in select/poll to kill some fds and retry */
315static void 1185static void noinline ecb_cold
316fd_enomem (void) 1186fd_enomem (EV_P)
317{ 1187{
318 int fd = anfdmax; 1188 int fd;
319 1189
320 while (fd--) 1190 for (fd = anfdmax; fd--; )
321 if (anfds [fd].events) 1191 if (anfds [fd].events)
322 { 1192 {
323 close (fd);
324 fd_kill (fd); 1193 fd_kill (EV_A_ fd);
325 return; 1194 break;
326 } 1195 }
327} 1196}
328 1197
1198/* usually called after fork if backend needs to re-arm all fds from scratch */
1199static void noinline
1200fd_rearm_all (EV_P)
1201{
1202 int fd;
1203
1204 for (fd = 0; fd < anfdmax; ++fd)
1205 if (anfds [fd].events)
1206 {
1207 anfds [fd].events = 0;
1208 anfds [fd].emask = 0;
1209 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1210 }
1211}
1212
1213/* used to prepare libev internal fd's */
1214/* this is not fork-safe */
1215inline_speed void
1216fd_intern (int fd)
1217{
1218#ifdef _WIN32
1219 unsigned long arg = 1;
1220 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1221#else
1222 fcntl (fd, F_SETFD, FD_CLOEXEC);
1223 fcntl (fd, F_SETFL, O_NONBLOCK);
1224#endif
1225}
1226
329/*****************************************************************************/ 1227/*****************************************************************************/
330 1228
331static struct ev_timer **timers; 1229/*
332static int timermax, timercnt; 1230 * the heap functions want a real array index. array index 0 is guaranteed to not
1231 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1232 * the branching factor of the d-tree.
1233 */
333 1234
334static struct ev_periodic **periodics; 1235/*
335static int periodicmax, periodiccnt; 1236 * at the moment we allow libev the luxury of two heaps,
1237 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1238 * which is more cache-efficient.
1239 * the difference is about 5% with 50000+ watchers.
1240 */
1241#if EV_USE_4HEAP
336 1242
1243#define DHEAP 4
1244#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1245#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1246#define UPHEAP_DONE(p,k) ((p) == (k))
1247
1248/* away from the root */
1249inline_speed void
1250downheap (ANHE *heap, int N, int k)
1251{
1252 ANHE he = heap [k];
1253 ANHE *E = heap + N + HEAP0;
1254
1255 for (;;)
1256 {
1257 ev_tstamp minat;
1258 ANHE *minpos;
1259 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1260
1261 /* find minimum child */
1262 if (expect_true (pos + DHEAP - 1 < E))
1263 {
1264 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1265 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1266 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1267 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1268 }
1269 else if (pos < E)
1270 {
1271 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1272 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1273 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1274 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1275 }
1276 else
1277 break;
1278
1279 if (ANHE_at (he) <= minat)
1280 break;
1281
1282 heap [k] = *minpos;
1283 ev_active (ANHE_w (*minpos)) = k;
1284
1285 k = minpos - heap;
1286 }
1287
1288 heap [k] = he;
1289 ev_active (ANHE_w (he)) = k;
1290}
1291
1292#else /* 4HEAP */
1293
1294#define HEAP0 1
1295#define HPARENT(k) ((k) >> 1)
1296#define UPHEAP_DONE(p,k) (!(p))
1297
1298/* away from the root */
1299inline_speed void
1300downheap (ANHE *heap, int N, int k)
1301{
1302 ANHE he = heap [k];
1303
1304 for (;;)
1305 {
1306 int c = k << 1;
1307
1308 if (c >= N + HEAP0)
1309 break;
1310
1311 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1312 ? 1 : 0;
1313
1314 if (ANHE_at (he) <= ANHE_at (heap [c]))
1315 break;
1316
1317 heap [k] = heap [c];
1318 ev_active (ANHE_w (heap [k])) = k;
1319
1320 k = c;
1321 }
1322
1323 heap [k] = he;
1324 ev_active (ANHE_w (he)) = k;
1325}
1326#endif
1327
1328/* towards the root */
1329inline_speed void
1330upheap (ANHE *heap, int k)
1331{
1332 ANHE he = heap [k];
1333
1334 for (;;)
1335 {
1336 int p = HPARENT (k);
1337
1338 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1339 break;
1340
1341 heap [k] = heap [p];
1342 ev_active (ANHE_w (heap [k])) = k;
1343 k = p;
1344 }
1345
1346 heap [k] = he;
1347 ev_active (ANHE_w (he)) = k;
1348}
1349
1350/* move an element suitably so it is in a correct place */
1351inline_size void
1352adjustheap (ANHE *heap, int N, int k)
1353{
1354 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1355 upheap (heap, k);
1356 else
1357 downheap (heap, N, k);
1358}
1359
1360/* rebuild the heap: this function is used only once and executed rarely */
1361inline_size void
1362reheap (ANHE *heap, int N)
1363{
1364 int i;
1365
1366 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1367 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1368 for (i = 0; i < N; ++i)
1369 upheap (heap, i + HEAP0);
1370}
1371
1372/*****************************************************************************/
1373
1374/* associate signal watchers to a signal signal */
1375typedef struct
1376{
1377 EV_ATOMIC_T pending;
1378#if EV_MULTIPLICITY
1379 EV_P;
1380#endif
1381 WL head;
1382} ANSIG;
1383
1384static ANSIG signals [EV_NSIG - 1];
1385
1386/*****************************************************************************/
1387
1388#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1389
1390static void noinline ecb_cold
1391evpipe_init (EV_P)
1392{
1393 if (!ev_is_active (&pipe_w))
1394 {
1395# if EV_USE_EVENTFD
1396 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1397 if (evfd < 0 && errno == EINVAL)
1398 evfd = eventfd (0, 0);
1399
1400 if (evfd >= 0)
1401 {
1402 evpipe [0] = -1;
1403 fd_intern (evfd); /* doing it twice doesn't hurt */
1404 ev_io_set (&pipe_w, evfd, EV_READ);
1405 }
1406 else
1407# endif
1408 {
1409 while (pipe (evpipe))
1410 ev_syserr ("(libev) error creating signal/async pipe");
1411
1412 fd_intern (evpipe [0]);
1413 fd_intern (evpipe [1]);
1414 ev_io_set (&pipe_w, evpipe [0], EV_READ);
1415 }
1416
1417 ev_io_start (EV_A_ &pipe_w);
1418 ev_unref (EV_A); /* watcher should not keep loop alive */
1419 }
1420}
1421
1422inline_size void
1423evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1424{
1425 if (!*flag)
1426 {
1427 *flag = 1;
1428
1429 pipe_write_skipped = 1;
1430
1431 if (pipe_write_wanted)
1432 {
1433 int old_errno = errno; /* save errno because write will clobber it */
1434 char dummy;
1435
1436 pipe_write_skipped = 0;
1437
1438#if EV_USE_EVENTFD
1439 if (evfd >= 0)
1440 {
1441 uint64_t counter = 1;
1442 write (evfd, &counter, sizeof (uint64_t));
1443 }
1444 else
1445#endif
1446 {
1447 /* win32 people keep sending patches that change this write() to send() */
1448 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1449 /* so when you think this write should be a send instead, please find out */
1450 /* where your send() is from - it's definitely not the microsoft send, and */
1451 /* tell me. thank you. */
1452 write (evpipe [1], &dummy, 1);
1453 }
1454
1455 errno = old_errno;
1456 }
1457 }
1458}
1459
1460/* called whenever the libev signal pipe */
1461/* got some events (signal, async) */
337static void 1462static void
338upheap (WT *timers, int k) 1463pipecb (EV_P_ ev_io *iow, int revents)
339{ 1464{
340 WT w = timers [k]; 1465 int i;
341 1466
342 while (k && timers [k >> 1]->at > w->at) 1467 if (revents & EV_READ)
343 {
344 timers [k] = timers [k >> 1];
345 timers [k]->active = k + 1;
346 k >>= 1;
347 } 1468 {
1469#if EV_USE_EVENTFD
1470 if (evfd >= 0)
1471 {
1472 uint64_t counter;
1473 read (evfd, &counter, sizeof (uint64_t));
1474 }
1475 else
1476#endif
1477 {
1478 char dummy;
1479 /* see discussion in evpipe_write when you think this read should be recv in win32 */
1480 read (evpipe [0], &dummy, 1);
1481 }
1482 }
348 1483
349 timers [k] = w; 1484 pipe_write_skipped = 0;
350 timers [k]->active = k + 1;
351 1485
1486#if EV_SIGNAL_ENABLE
1487 if (sig_pending)
1488 {
1489 sig_pending = 0;
1490
1491 for (i = EV_NSIG - 1; i--; )
1492 if (expect_false (signals [i].pending))
1493 ev_feed_signal_event (EV_A_ i + 1);
1494 }
1495#endif
1496
1497#if EV_ASYNC_ENABLE
1498 if (async_pending)
1499 {
1500 async_pending = 0;
1501
1502 for (i = asynccnt; i--; )
1503 if (asyncs [i]->sent)
1504 {
1505 asyncs [i]->sent = 0;
1506 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1507 }
1508 }
1509#endif
1510}
1511
1512/*****************************************************************************/
1513
1514void
1515ev_feed_signal (int signum)
1516{
1517#if EV_MULTIPLICITY
1518 EV_P = signals [signum - 1].loop;
1519
1520 if (!EV_A)
1521 return;
1522#endif
1523
1524 evpipe_init (EV_A);
1525
1526 signals [signum - 1].pending = 1;
1527 evpipe_write (EV_A_ &sig_pending);
352} 1528}
353 1529
354static void 1530static void
355downheap (WT *timers, int N, int k) 1531ev_sighandler (int signum)
356{ 1532{
357 WT w = timers [k]; 1533#ifdef _WIN32
1534 signal (signum, ev_sighandler);
1535#endif
358 1536
359 while (k < (N >> 1)) 1537 ev_feed_signal (signum);
360 { 1538}
361 int j = k << 1;
362 1539
363 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 1540void noinline
364 ++j; 1541ev_feed_signal_event (EV_P_ int signum)
1542{
1543 WL w;
365 1544
366 if (w->at <= timers [j]->at) 1545 if (expect_false (signum <= 0 || signum > EV_NSIG))
1546 return;
1547
1548 --signum;
1549
1550#if EV_MULTIPLICITY
1551 /* it is permissible to try to feed a signal to the wrong loop */
1552 /* or, likely more useful, feeding a signal nobody is waiting for */
1553
1554 if (expect_false (signals [signum].loop != EV_A))
1555 return;
1556#endif
1557
1558 signals [signum].pending = 0;
1559
1560 for (w = signals [signum].head; w; w = w->next)
1561 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1562}
1563
1564#if EV_USE_SIGNALFD
1565static void
1566sigfdcb (EV_P_ ev_io *iow, int revents)
1567{
1568 struct signalfd_siginfo si[2], *sip; /* these structs are big */
1569
1570 for (;;)
1571 {
1572 ssize_t res = read (sigfd, si, sizeof (si));
1573
1574 /* not ISO-C, as res might be -1, but works with SuS */
1575 for (sip = si; (char *)sip < (char *)si + res; ++sip)
1576 ev_feed_signal_event (EV_A_ sip->ssi_signo);
1577
1578 if (res < (ssize_t)sizeof (si))
367 break; 1579 break;
368
369 timers [k] = timers [j];
370 timers [k]->active = k + 1;
371 k = j;
372 } 1580 }
373
374 timers [k] = w;
375 timers [k]->active = k + 1;
376} 1581}
1582#endif
1583
1584#endif
377 1585
378/*****************************************************************************/ 1586/*****************************************************************************/
379 1587
380typedef struct 1588#if EV_CHILD_ENABLE
381{ 1589static WL childs [EV_PID_HASHSIZE];
382 struct ev_signal *head;
383 sig_atomic_t volatile gotsig;
384} ANSIG;
385 1590
386static ANSIG *signals;
387static int signalmax;
388
389static int sigpipe [2];
390static sig_atomic_t volatile gotsig;
391static struct ev_io sigev;
392
393static void
394signals_init (ANSIG *base, int count)
395{
396 while (count--)
397 {
398 base->head = 0;
399 base->gotsig = 0;
400
401 ++base;
402 }
403}
404
405static void
406sighandler (int signum)
407{
408 signals [signum - 1].gotsig = 1;
409
410 if (!gotsig)
411 {
412 gotsig = 1;
413 write (sigpipe [1], &signum, 1);
414 }
415}
416
417static void
418sigcb (struct ev_io *iow, int revents)
419{
420 struct ev_signal *w;
421 int signum;
422
423 read (sigpipe [0], &revents, 1);
424 gotsig = 0;
425
426 for (signum = signalmax; signum--; )
427 if (signals [signum].gotsig)
428 {
429 signals [signum].gotsig = 0;
430
431 for (w = signals [signum].head; w; w = w->next)
432 event ((W)w, EV_SIGNAL);
433 }
434}
435
436static void
437siginit (void)
438{
439 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
440 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
441
442 /* rather than sort out wether we really need nb, set it */
443 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
444 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
445
446 ev_io_set (&sigev, sigpipe [0], EV_READ);
447 ev_io_start (&sigev);
448}
449
450/*****************************************************************************/
451
452static struct ev_idle **idles;
453static int idlemax, idlecnt;
454
455static struct ev_prepare **prepares;
456static int preparemax, preparecnt;
457
458static struct ev_check **checks;
459static int checkmax, checkcnt;
460
461/*****************************************************************************/
462
463static struct ev_child *childs [PID_HASHSIZE];
464static struct ev_signal childev; 1591static ev_signal childev;
1592
1593#ifndef WIFCONTINUED
1594# define WIFCONTINUED(status) 0
1595#endif
1596
1597/* handle a single child status event */
1598inline_speed void
1599child_reap (EV_P_ int chain, int pid, int status)
1600{
1601 ev_child *w;
1602 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1603
1604 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1605 {
1606 if ((w->pid == pid || !w->pid)
1607 && (!traced || (w->flags & 1)))
1608 {
1609 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
1610 w->rpid = pid;
1611 w->rstatus = status;
1612 ev_feed_event (EV_A_ (W)w, EV_CHILD);
1613 }
1614 }
1615}
465 1616
466#ifndef WCONTINUED 1617#ifndef WCONTINUED
467# define WCONTINUED 0 1618# define WCONTINUED 0
468#endif 1619#endif
469 1620
1621/* called on sigchld etc., calls waitpid */
470static void 1622static void
471childcb (struct ev_signal *sw, int revents) 1623childcb (EV_P_ ev_signal *sw, int revents)
472{ 1624{
473 struct ev_child *w;
474 int pid, status; 1625 int pid, status;
475 1626
1627 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
476 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 1628 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
477 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 1629 if (!WCONTINUED
478 if (w->pid == pid || !w->pid) 1630 || errno != EINVAL
479 { 1631 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
480 w->status = status; 1632 return;
481 event ((W)w, EV_CHILD); 1633
482 } 1634 /* make sure we are called again until all children have been reaped */
1635 /* we need to do it this way so that the callback gets called before we continue */
1636 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1637
1638 child_reap (EV_A_ pid, pid, status);
1639 if ((EV_PID_HASHSIZE) > 1)
1640 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
483} 1641}
1642
1643#endif
484 1644
485/*****************************************************************************/ 1645/*****************************************************************************/
486 1646
1647#if EV_USE_IOCP
1648# include "ev_iocp.c"
1649#endif
1650#if EV_USE_PORT
1651# include "ev_port.c"
1652#endif
1653#if EV_USE_KQUEUE
1654# include "ev_kqueue.c"
1655#endif
487#if EV_USE_EPOLL 1656#if EV_USE_EPOLL
488# include "ev_epoll.c" 1657# include "ev_epoll.c"
489#endif 1658#endif
490#if EV_USE_POLL 1659#if EV_USE_POLL
491# include "ev_poll.c" 1660# include "ev_poll.c"
492#endif 1661#endif
493#if EV_USE_SELECT 1662#if EV_USE_SELECT
494# include "ev_select.c" 1663# include "ev_select.c"
495#endif 1664#endif
496 1665
497int 1666int ecb_cold
498ev_version_major (void) 1667ev_version_major (void)
499{ 1668{
500 return EV_VERSION_MAJOR; 1669 return EV_VERSION_MAJOR;
501} 1670}
502 1671
503int 1672int ecb_cold
504ev_version_minor (void) 1673ev_version_minor (void)
505{ 1674{
506 return EV_VERSION_MINOR; 1675 return EV_VERSION_MINOR;
507} 1676}
508 1677
509/* return true if we are running with elevated privileges and ignore env variables */ 1678/* return true if we are running with elevated privileges and should ignore env variables */
510static int 1679int inline_size ecb_cold
511enable_secure () 1680enable_secure (void)
512{ 1681{
1682#ifdef _WIN32
1683 return 0;
1684#else
513 return getuid () != geteuid () 1685 return getuid () != geteuid ()
514 || getgid () != getegid (); 1686 || getgid () != getegid ();
1687#endif
515} 1688}
516 1689
517int ev_init (int methods) 1690unsigned int ecb_cold
1691ev_supported_backends (void)
518{ 1692{
519 if (!ev_method) 1693 unsigned int flags = 0;
1694
1695 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1696 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
1697 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
1698 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1699 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1700
1701 return flags;
1702}
1703
1704unsigned int ecb_cold
1705ev_recommended_backends (void)
1706{
1707 unsigned int flags = ev_supported_backends ();
1708
1709#ifndef __NetBSD__
1710 /* kqueue is borked on everything but netbsd apparently */
1711 /* it usually doesn't work correctly on anything but sockets and pipes */
1712 flags &= ~EVBACKEND_KQUEUE;
1713#endif
1714#ifdef __APPLE__
1715 /* only select works correctly on that "unix-certified" platform */
1716 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
1717 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
1718#endif
1719#ifdef __FreeBSD__
1720 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1721#endif
1722
1723 return flags;
1724}
1725
1726unsigned int ecb_cold
1727ev_embeddable_backends (void)
1728{
1729 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1730
1731 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1732 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1733 flags &= ~EVBACKEND_EPOLL;
1734
1735 return flags;
1736}
1737
1738unsigned int
1739ev_backend (EV_P)
1740{
1741 return backend;
1742}
1743
1744#if EV_FEATURE_API
1745unsigned int
1746ev_iteration (EV_P)
1747{
1748 return loop_count;
1749}
1750
1751unsigned int
1752ev_depth (EV_P)
1753{
1754 return loop_depth;
1755}
1756
1757void
1758ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
1759{
1760 io_blocktime = interval;
1761}
1762
1763void
1764ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
1765{
1766 timeout_blocktime = interval;
1767}
1768
1769void
1770ev_set_userdata (EV_P_ void *data)
1771{
1772 userdata = data;
1773}
1774
1775void *
1776ev_userdata (EV_P)
1777{
1778 return userdata;
1779}
1780
1781void
1782ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P))
1783{
1784 invoke_cb = invoke_pending_cb;
1785}
1786
1787void
1788ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P))
1789{
1790 release_cb = release;
1791 acquire_cb = acquire;
1792}
1793#endif
1794
1795/* initialise a loop structure, must be zero-initialised */
1796static void noinline ecb_cold
1797loop_init (EV_P_ unsigned int flags)
1798{
1799 if (!backend)
520 { 1800 {
1801 origflags = flags;
1802
1803#if EV_USE_REALTIME
1804 if (!have_realtime)
1805 {
1806 struct timespec ts;
1807
1808 if (!clock_gettime (CLOCK_REALTIME, &ts))
1809 have_realtime = 1;
1810 }
1811#endif
1812
521#if EV_USE_MONOTONIC 1813#if EV_USE_MONOTONIC
1814 if (!have_monotonic)
1815 {
1816 struct timespec ts;
1817
1818 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1819 have_monotonic = 1;
1820 }
1821#endif
1822
1823 /* pid check not overridable via env */
1824#ifndef _WIN32
1825 if (flags & EVFLAG_FORKCHECK)
1826 curpid = getpid ();
1827#endif
1828
1829 if (!(flags & EVFLAG_NOENV)
1830 && !enable_secure ()
1831 && getenv ("LIBEV_FLAGS"))
1832 flags = atoi (getenv ("LIBEV_FLAGS"));
1833
1834 ev_rt_now = ev_time ();
1835 mn_now = get_clock ();
1836 now_floor = mn_now;
1837 rtmn_diff = ev_rt_now - mn_now;
1838#if EV_FEATURE_API
1839 invoke_cb = ev_invoke_pending;
1840#endif
1841
1842 io_blocktime = 0.;
1843 timeout_blocktime = 0.;
1844 backend = 0;
1845 backend_fd = -1;
1846 sig_pending = 0;
1847#if EV_ASYNC_ENABLE
1848 async_pending = 0;
1849#endif
1850 pipe_write_skipped = 0;
1851 pipe_write_wanted = 0;
1852#if EV_USE_INOTIFY
1853 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1854#endif
1855#if EV_USE_SIGNALFD
1856 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1857#endif
1858
1859 if (!(flags & EVBACKEND_MASK))
1860 flags |= ev_recommended_backends ();
1861
1862#if EV_USE_IOCP
1863 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1864#endif
1865#if EV_USE_PORT
1866 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1867#endif
1868#if EV_USE_KQUEUE
1869 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
1870#endif
1871#if EV_USE_EPOLL
1872 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1873#endif
1874#if EV_USE_POLL
1875 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1876#endif
1877#if EV_USE_SELECT
1878 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1879#endif
1880
1881 ev_prepare_init (&pending_w, pendingcb);
1882
1883#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1884 ev_init (&pipe_w, pipecb);
1885 ev_set_priority (&pipe_w, EV_MAXPRI);
1886#endif
1887 }
1888}
1889
1890/* free up a loop structure */
1891void ecb_cold
1892ev_loop_destroy (EV_P)
1893{
1894 int i;
1895
1896#if EV_MULTIPLICITY
1897 /* mimic free (0) */
1898 if (!EV_A)
1899 return;
1900#endif
1901
1902#if EV_CLEANUP_ENABLE
1903 /* queue cleanup watchers (and execute them) */
1904 if (expect_false (cleanupcnt))
1905 {
1906 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
1907 EV_INVOKE_PENDING;
1908 }
1909#endif
1910
1911#if EV_CHILD_ENABLE
1912 if (ev_is_active (&childev))
1913 {
1914 ev_ref (EV_A); /* child watcher */
1915 ev_signal_stop (EV_A_ &childev);
1916 }
1917#endif
1918
1919 if (ev_is_active (&pipe_w))
1920 {
1921 /*ev_ref (EV_A);*/
1922 /*ev_io_stop (EV_A_ &pipe_w);*/
1923
1924#if EV_USE_EVENTFD
1925 if (evfd >= 0)
1926 close (evfd);
1927#endif
1928
1929 if (evpipe [0] >= 0)
1930 {
1931 EV_WIN32_CLOSE_FD (evpipe [0]);
1932 EV_WIN32_CLOSE_FD (evpipe [1]);
1933 }
1934 }
1935
1936#if EV_USE_SIGNALFD
1937 if (ev_is_active (&sigfd_w))
1938 close (sigfd);
1939#endif
1940
1941#if EV_USE_INOTIFY
1942 if (fs_fd >= 0)
1943 close (fs_fd);
1944#endif
1945
1946 if (backend_fd >= 0)
1947 close (backend_fd);
1948
1949#if EV_USE_IOCP
1950 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1951#endif
1952#if EV_USE_PORT
1953 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1954#endif
1955#if EV_USE_KQUEUE
1956 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
1957#endif
1958#if EV_USE_EPOLL
1959 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1960#endif
1961#if EV_USE_POLL
1962 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1963#endif
1964#if EV_USE_SELECT
1965 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
1966#endif
1967
1968 for (i = NUMPRI; i--; )
1969 {
1970 array_free (pending, [i]);
1971#if EV_IDLE_ENABLE
1972 array_free (idle, [i]);
1973#endif
1974 }
1975
1976 ev_free (anfds); anfds = 0; anfdmax = 0;
1977
1978 /* have to use the microsoft-never-gets-it-right macro */
1979 array_free (rfeed, EMPTY);
1980 array_free (fdchange, EMPTY);
1981 array_free (timer, EMPTY);
1982#if EV_PERIODIC_ENABLE
1983 array_free (periodic, EMPTY);
1984#endif
1985#if EV_FORK_ENABLE
1986 array_free (fork, EMPTY);
1987#endif
1988#if EV_CLEANUP_ENABLE
1989 array_free (cleanup, EMPTY);
1990#endif
1991 array_free (prepare, EMPTY);
1992 array_free (check, EMPTY);
1993#if EV_ASYNC_ENABLE
1994 array_free (async, EMPTY);
1995#endif
1996
1997 backend = 0;
1998
1999#if EV_MULTIPLICITY
2000 if (ev_is_default_loop (EV_A))
2001#endif
2002 ev_default_loop_ptr = 0;
2003#if EV_MULTIPLICITY
2004 else
2005 ev_free (EV_A);
2006#endif
2007}
2008
2009#if EV_USE_INOTIFY
2010inline_size void infy_fork (EV_P);
2011#endif
2012
2013inline_size void
2014loop_fork (EV_P)
2015{
2016#if EV_USE_PORT
2017 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2018#endif
2019#if EV_USE_KQUEUE
2020 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
2021#endif
2022#if EV_USE_EPOLL
2023 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
2024#endif
2025#if EV_USE_INOTIFY
2026 infy_fork (EV_A);
2027#endif
2028
2029 if (ev_is_active (&pipe_w))
2030 {
2031 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2032
2033 ev_ref (EV_A);
2034 ev_io_stop (EV_A_ &pipe_w);
2035
2036#if EV_USE_EVENTFD
2037 if (evfd >= 0)
2038 close (evfd);
2039#endif
2040
2041 if (evpipe [0] >= 0)
2042 {
2043 EV_WIN32_CLOSE_FD (evpipe [0]);
2044 EV_WIN32_CLOSE_FD (evpipe [1]);
2045 }
2046
2047#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2048 evpipe_init (EV_A);
2049 /* now iterate over everything, in case we missed something */
2050 pipecb (EV_A_ &pipe_w, EV_READ);
2051#endif
2052 }
2053
2054 postfork = 0;
2055}
2056
2057#if EV_MULTIPLICITY
2058
2059struct ev_loop * ecb_cold
2060ev_loop_new (unsigned int flags)
2061{
2062 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2063
2064 memset (EV_A, 0, sizeof (struct ev_loop));
2065 loop_init (EV_A_ flags);
2066
2067 if (ev_backend (EV_A))
2068 return EV_A;
2069
2070 ev_free (EV_A);
2071 return 0;
2072}
2073
2074#endif /* multiplicity */
2075
2076#if EV_VERIFY
2077static void noinline ecb_cold
2078verify_watcher (EV_P_ W w)
2079{
2080 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2081
2082 if (w->pending)
2083 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2084}
2085
2086static void noinline ecb_cold
2087verify_heap (EV_P_ ANHE *heap, int N)
2088{
2089 int i;
2090
2091 for (i = HEAP0; i < N + HEAP0; ++i)
2092 {
2093 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2094 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2095 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2096
2097 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2098 }
2099}
2100
2101static void noinline ecb_cold
2102array_verify (EV_P_ W *ws, int cnt)
2103{
2104 while (cnt--)
2105 {
2106 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2107 verify_watcher (EV_A_ ws [cnt]);
2108 }
2109}
2110#endif
2111
2112#if EV_FEATURE_API
2113void ecb_cold
2114ev_verify (EV_P)
2115{
2116#if EV_VERIFY
2117 int i;
2118 WL w;
2119
2120 assert (activecnt >= -1);
2121
2122 assert (fdchangemax >= fdchangecnt);
2123 for (i = 0; i < fdchangecnt; ++i)
2124 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2125
2126 assert (anfdmax >= 0);
2127 for (i = 0; i < anfdmax; ++i)
2128 for (w = anfds [i].head; w; w = w->next)
522 { 2129 {
523 struct timespec ts; 2130 verify_watcher (EV_A_ (W)w);
524 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2131 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
525 have_monotonic = 1; 2132 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
526 } 2133 }
2134
2135 assert (timermax >= timercnt);
2136 verify_heap (EV_A_ timers, timercnt);
2137
2138#if EV_PERIODIC_ENABLE
2139 assert (periodicmax >= periodiccnt);
2140 verify_heap (EV_A_ periodics, periodiccnt);
2141#endif
2142
2143 for (i = NUMPRI; i--; )
2144 {
2145 assert (pendingmax [i] >= pendingcnt [i]);
2146#if EV_IDLE_ENABLE
2147 assert (idleall >= 0);
2148 assert (idlemax [i] >= idlecnt [i]);
2149 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2150#endif
2151 }
2152
2153#if EV_FORK_ENABLE
2154 assert (forkmax >= forkcnt);
2155 array_verify (EV_A_ (W *)forks, forkcnt);
2156#endif
2157
2158#if EV_CLEANUP_ENABLE
2159 assert (cleanupmax >= cleanupcnt);
2160 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2161#endif
2162
2163#if EV_ASYNC_ENABLE
2164 assert (asyncmax >= asynccnt);
2165 array_verify (EV_A_ (W *)asyncs, asynccnt);
2166#endif
2167
2168#if EV_PREPARE_ENABLE
2169 assert (preparemax >= preparecnt);
2170 array_verify (EV_A_ (W *)prepares, preparecnt);
2171#endif
2172
2173#if EV_CHECK_ENABLE
2174 assert (checkmax >= checkcnt);
2175 array_verify (EV_A_ (W *)checks, checkcnt);
2176#endif
2177
2178# if 0
2179#if EV_CHILD_ENABLE
2180 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2181 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2182#endif
527#endif 2183# endif
528
529 ev_now = ev_time ();
530 now = get_clock ();
531 now_floor = now;
532 diff = ev_now - now;
533
534 if (pipe (sigpipe))
535 return 0;
536
537 if (methods == EVMETHOD_AUTO)
538 if (!enable_secure () && getenv ("LIBEV_METHODS"))
539 methods = atoi (getenv ("LIBEV_METHODS"));
540 else
541 methods = EVMETHOD_ANY;
542
543 ev_method = 0;
544#if EV_USE_EPOLL
545 if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);
546#endif 2184#endif
547#if EV_USE_POLL 2185}
548 if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);
549#endif 2186#endif
550#if EV_USE_SELECT
551 if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);
552#endif
553 2187
554 if (ev_method) 2188#if EV_MULTIPLICITY
2189struct ev_loop * ecb_cold
2190#else
2191int
2192#endif
2193ev_default_loop (unsigned int flags)
2194{
2195 if (!ev_default_loop_ptr)
2196 {
2197#if EV_MULTIPLICITY
2198 EV_P = ev_default_loop_ptr = &default_loop_struct;
2199#else
2200 ev_default_loop_ptr = 1;
2201#endif
2202
2203 loop_init (EV_A_ flags);
2204
2205 if (ev_backend (EV_A))
555 { 2206 {
556 ev_watcher_init (&sigev, sigcb); 2207#if EV_CHILD_ENABLE
557 siginit ();
558
559 ev_signal_init (&childev, childcb, SIGCHLD); 2208 ev_signal_init (&childev, childcb, SIGCHLD);
2209 ev_set_priority (&childev, EV_MAXPRI);
560 ev_signal_start (&childev); 2210 ev_signal_start (EV_A_ &childev);
2211 ev_unref (EV_A); /* child watcher should not keep loop alive */
2212#endif
561 } 2213 }
2214 else
2215 ev_default_loop_ptr = 0;
562 } 2216 }
563 2217
564 return ev_method; 2218 return ev_default_loop_ptr;
2219}
2220
2221void
2222ev_loop_fork (EV_P)
2223{
2224 postfork = 1; /* must be in line with ev_default_fork */
565} 2225}
566 2226
567/*****************************************************************************/ 2227/*****************************************************************************/
568 2228
569void 2229void
570ev_fork_prepare (void) 2230ev_invoke (EV_P_ void *w, int revents)
571{ 2231{
572 /* nop */ 2232 EV_CB_INVOKE ((W)w, revents);
573} 2233}
574 2234
575void 2235unsigned int
576ev_fork_parent (void) 2236ev_pending_count (EV_P)
577{ 2237{
578 /* nop */ 2238 int pri;
579} 2239 unsigned int count = 0;
580 2240
581void 2241 for (pri = NUMPRI; pri--; )
582ev_fork_child (void) 2242 count += pendingcnt [pri];
583{
584#if EV_USE_EPOLL
585 if (ev_method == EVMETHOD_EPOLL)
586 epoll_postfork_child ();
587#endif
588 2243
589 ev_io_stop (&sigev); 2244 return count;
590 close (sigpipe [0]);
591 close (sigpipe [1]);
592 pipe (sigpipe);
593 siginit ();
594} 2245}
595 2246
596/*****************************************************************************/ 2247void noinline
597 2248ev_invoke_pending (EV_P)
598static void
599call_pending (void)
600{ 2249{
601 int pri; 2250 int pri;
602 2251
603 for (pri = NUMPRI; pri--; ) 2252 for (pri = NUMPRI; pri--; )
604 while (pendingcnt [pri]) 2253 while (pendingcnt [pri])
605 { 2254 {
606 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 2255 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
607 2256
608 if (p->w) 2257 p->w->pending = 0;
2258 EV_CB_INVOKE (p->w, p->events);
2259 EV_FREQUENT_CHECK;
2260 }
2261}
2262
2263#if EV_IDLE_ENABLE
2264/* make idle watchers pending. this handles the "call-idle */
2265/* only when higher priorities are idle" logic */
2266inline_size void
2267idle_reify (EV_P)
2268{
2269 if (expect_false (idleall))
2270 {
2271 int pri;
2272
2273 for (pri = NUMPRI; pri--; )
2274 {
2275 if (pendingcnt [pri])
2276 break;
2277
2278 if (idlecnt [pri])
2279 {
2280 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2281 break;
2282 }
2283 }
2284 }
2285}
2286#endif
2287
2288/* make timers pending */
2289inline_size void
2290timers_reify (EV_P)
2291{
2292 EV_FREQUENT_CHECK;
2293
2294 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2295 {
2296 do
2297 {
2298 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2299
2300 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2301
2302 /* first reschedule or stop timer */
2303 if (w->repeat)
2304 {
2305 ev_at (w) += w->repeat;
2306 if (ev_at (w) < mn_now)
2307 ev_at (w) = mn_now;
2308
2309 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2310
2311 ANHE_at_cache (timers [HEAP0]);
2312 downheap (timers, timercnt, HEAP0);
2313 }
2314 else
2315 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2316
2317 EV_FREQUENT_CHECK;
2318 feed_reverse (EV_A_ (W)w);
2319 }
2320 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2321
2322 feed_reverse_done (EV_A_ EV_TIMER);
2323 }
2324}
2325
2326#if EV_PERIODIC_ENABLE
2327
2328static void noinline
2329periodic_recalc (EV_P_ ev_periodic *w)
2330{
2331 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2332 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2333
2334 /* the above almost always errs on the low side */
2335 while (at <= ev_rt_now)
2336 {
2337 ev_tstamp nat = at + w->interval;
2338
2339 /* when resolution fails us, we use ev_rt_now */
2340 if (expect_false (nat == at))
2341 {
2342 at = ev_rt_now;
2343 break;
2344 }
2345
2346 at = nat;
2347 }
2348
2349 ev_at (w) = at;
2350}
2351
2352/* make periodics pending */
2353inline_size void
2354periodics_reify (EV_P)
2355{
2356 EV_FREQUENT_CHECK;
2357
2358 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2359 {
2360 int feed_count = 0;
2361
2362 do
2363 {
2364 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2365
2366 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2367
2368 /* first reschedule or stop timer */
2369 if (w->reschedule_cb)
2370 {
2371 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2372
2373 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2374
2375 ANHE_at_cache (periodics [HEAP0]);
2376 downheap (periodics, periodiccnt, HEAP0);
2377 }
2378 else if (w->interval)
2379 {
2380 periodic_recalc (EV_A_ w);
2381 ANHE_at_cache (periodics [HEAP0]);
2382 downheap (periodics, periodiccnt, HEAP0);
2383 }
2384 else
2385 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2386
2387 EV_FREQUENT_CHECK;
2388 feed_reverse (EV_A_ (W)w);
2389 }
2390 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2391
2392 feed_reverse_done (EV_A_ EV_PERIODIC);
2393 }
2394}
2395
2396/* simply recalculate all periodics */
2397/* TODO: maybe ensure that at least one event happens when jumping forward? */
2398static void noinline ecb_cold
2399periodics_reschedule (EV_P)
2400{
2401 int i;
2402
2403 /* adjust periodics after time jump */
2404 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2405 {
2406 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2407
2408 if (w->reschedule_cb)
2409 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2410 else if (w->interval)
2411 periodic_recalc (EV_A_ w);
2412
2413 ANHE_at_cache (periodics [i]);
2414 }
2415
2416 reheap (periodics, periodiccnt);
2417}
2418#endif
2419
2420/* adjust all timers by a given offset */
2421static void noinline ecb_cold
2422timers_reschedule (EV_P_ ev_tstamp adjust)
2423{
2424 int i;
2425
2426 for (i = 0; i < timercnt; ++i)
2427 {
2428 ANHE *he = timers + i + HEAP0;
2429 ANHE_w (*he)->at += adjust;
2430 ANHE_at_cache (*he);
2431 }
2432}
2433
2434/* fetch new monotonic and realtime times from the kernel */
2435/* also detect if there was a timejump, and act accordingly */
2436inline_speed void
2437time_update (EV_P_ ev_tstamp max_block)
2438{
2439#if EV_USE_MONOTONIC
2440 if (expect_true (have_monotonic))
2441 {
2442 int i;
2443 ev_tstamp odiff = rtmn_diff;
2444
2445 mn_now = get_clock ();
2446
2447 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2448 /* interpolate in the meantime */
2449 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2450 {
2451 ev_rt_now = rtmn_diff + mn_now;
2452 return;
2453 }
2454
2455 now_floor = mn_now;
2456 ev_rt_now = ev_time ();
2457
2458 /* loop a few times, before making important decisions.
2459 * on the choice of "4": one iteration isn't enough,
2460 * in case we get preempted during the calls to
2461 * ev_time and get_clock. a second call is almost guaranteed
2462 * to succeed in that case, though. and looping a few more times
2463 * doesn't hurt either as we only do this on time-jumps or
2464 * in the unlikely event of having been preempted here.
2465 */
2466 for (i = 4; --i; )
2467 {
2468 ev_tstamp diff;
2469 rtmn_diff = ev_rt_now - mn_now;
2470
2471 diff = odiff - rtmn_diff;
2472
2473 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2474 return; /* all is well */
2475
2476 ev_rt_now = ev_time ();
2477 mn_now = get_clock ();
2478 now_floor = mn_now;
2479 }
2480
2481 /* no timer adjustment, as the monotonic clock doesn't jump */
2482 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2483# if EV_PERIODIC_ENABLE
2484 periodics_reschedule (EV_A);
2485# endif
2486 }
2487 else
2488#endif
2489 {
2490 ev_rt_now = ev_time ();
2491
2492 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
2493 {
2494 /* adjust timers. this is easy, as the offset is the same for all of them */
2495 timers_reschedule (EV_A_ ev_rt_now - mn_now);
2496#if EV_PERIODIC_ENABLE
2497 periodics_reschedule (EV_A);
2498#endif
2499 }
2500
2501 mn_now = ev_rt_now;
2502 }
2503}
2504
2505void
2506ev_run (EV_P_ int flags)
2507{
2508#if EV_FEATURE_API
2509 ++loop_depth;
2510#endif
2511
2512 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
2513
2514 loop_done = EVBREAK_CANCEL;
2515
2516 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
2517
2518 do
2519 {
2520#if EV_VERIFY >= 2
2521 ev_verify (EV_A);
2522#endif
2523
2524#ifndef _WIN32
2525 if (expect_false (curpid)) /* penalise the forking check even more */
2526 if (expect_false (getpid () != curpid))
609 { 2527 {
610 p->w->pending = 0; 2528 curpid = getpid ();
611 p->w->cb (p->w, p->events); 2529 postfork = 1;
612 } 2530 }
2531#endif
2532
2533#if EV_FORK_ENABLE
2534 /* we might have forked, so queue fork handlers */
2535 if (expect_false (postfork))
2536 if (forkcnt)
2537 {
2538 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
2539 EV_INVOKE_PENDING;
2540 }
2541#endif
2542
2543#if EV_PREPARE_ENABLE
2544 /* queue prepare watchers (and execute them) */
2545 if (expect_false (preparecnt))
2546 {
2547 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
2548 EV_INVOKE_PENDING;
2549 }
2550#endif
2551
2552 if (expect_false (loop_done))
2553 break;
2554
2555 /* we might have forked, so reify kernel state if necessary */
2556 if (expect_false (postfork))
2557 loop_fork (EV_A);
2558
2559 /* update fd-related kernel structures */
2560 fd_reify (EV_A);
2561
2562 /* calculate blocking time */
2563 {
2564 ev_tstamp waittime = 0.;
2565 ev_tstamp sleeptime = 0.;
2566
2567 /* remember old timestamp for io_blocktime calculation */
2568 ev_tstamp prev_mn_now = mn_now;
2569
2570 /* update time to cancel out callback processing overhead */
2571 time_update (EV_A_ 1e100);
2572
2573 /* from now on, we want a pipe-wake-up */
2574 pipe_write_wanted = 1;
2575
2576 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2577 {
2578 waittime = MAX_BLOCKTIME;
2579
2580 if (timercnt)
2581 {
2582 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2583 if (waittime > to) waittime = to;
2584 }
2585
2586#if EV_PERIODIC_ENABLE
2587 if (periodiccnt)
2588 {
2589 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2590 if (waittime > to) waittime = to;
2591 }
2592#endif
2593
2594 /* don't let timeouts decrease the waittime below timeout_blocktime */
2595 if (expect_false (waittime < timeout_blocktime))
2596 waittime = timeout_blocktime;
2597
2598 /* at this point, we NEED to wait, so we have to ensure */
2599 /* to pass a minimum nonzero value to the backend */
2600 if (expect_false (waittime < backend_mintime))
2601 waittime = backend_mintime;
2602
2603 /* extra check because io_blocktime is commonly 0 */
2604 if (expect_false (io_blocktime))
2605 {
2606 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2607
2608 if (sleeptime > waittime - backend_mintime)
2609 sleeptime = waittime - backend_mintime;
2610
2611 if (expect_true (sleeptime > 0.))
2612 {
2613 ev_sleep (sleeptime);
2614 waittime -= sleeptime;
2615 }
2616 }
2617 }
2618
2619#if EV_FEATURE_API
2620 ++loop_count;
2621#endif
2622 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2623 backend_poll (EV_A_ waittime);
2624 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2625
2626 pipe_write_wanted = 0;
2627
2628 if (pipe_write_skipped)
2629 {
2630 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
2631 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2632 }
2633
2634
2635 /* update ev_rt_now, do magic */
2636 time_update (EV_A_ waittime + sleeptime);
613 } 2637 }
614}
615 2638
616static void 2639 /* queue pending timers and reschedule them */
617timers_reify (void) 2640 timers_reify (EV_A); /* relative timers called last */
2641#if EV_PERIODIC_ENABLE
2642 periodics_reify (EV_A); /* absolute timers called first */
2643#endif
2644
2645#if EV_IDLE_ENABLE
2646 /* queue idle watchers unless other events are pending */
2647 idle_reify (EV_A);
2648#endif
2649
2650#if EV_CHECK_ENABLE
2651 /* queue check watchers, to be executed first */
2652 if (expect_false (checkcnt))
2653 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
2654#endif
2655
2656 EV_INVOKE_PENDING;
2657 }
2658 while (expect_true (
2659 activecnt
2660 && !loop_done
2661 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2662 ));
2663
2664 if (loop_done == EVBREAK_ONE)
2665 loop_done = EVBREAK_CANCEL;
2666
2667#if EV_FEATURE_API
2668 --loop_depth;
2669#endif
2670}
2671
2672void
2673ev_break (EV_P_ int how)
618{ 2674{
619 while (timercnt && timers [0]->at <= now) 2675 loop_done = how;
2676}
2677
2678void
2679ev_ref (EV_P)
2680{
2681 ++activecnt;
2682}
2683
2684void
2685ev_unref (EV_P)
2686{
2687 --activecnt;
2688}
2689
2690void
2691ev_now_update (EV_P)
2692{
2693 time_update (EV_A_ 1e100);
2694}
2695
2696void
2697ev_suspend (EV_P)
2698{
2699 ev_now_update (EV_A);
2700}
2701
2702void
2703ev_resume (EV_P)
2704{
2705 ev_tstamp mn_prev = mn_now;
2706
2707 ev_now_update (EV_A);
2708 timers_reschedule (EV_A_ mn_now - mn_prev);
2709#if EV_PERIODIC_ENABLE
2710 /* TODO: really do this? */
2711 periodics_reschedule (EV_A);
2712#endif
2713}
2714
2715/*****************************************************************************/
2716/* singly-linked list management, used when the expected list length is short */
2717
2718inline_size void
2719wlist_add (WL *head, WL elem)
2720{
2721 elem->next = *head;
2722 *head = elem;
2723}
2724
2725inline_size void
2726wlist_del (WL *head, WL elem)
2727{
2728 while (*head)
2729 {
2730 if (expect_true (*head == elem))
2731 {
2732 *head = elem->next;
2733 break;
2734 }
2735
2736 head = &(*head)->next;
2737 }
2738}
2739
2740/* internal, faster, version of ev_clear_pending */
2741inline_speed void
2742clear_pending (EV_P_ W w)
2743{
2744 if (w->pending)
2745 {
2746 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2747 w->pending = 0;
2748 }
2749}
2750
2751int
2752ev_clear_pending (EV_P_ void *w)
2753{
2754 W w_ = (W)w;
2755 int pending = w_->pending;
2756
2757 if (expect_true (pending))
2758 {
2759 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
2760 p->w = (W)&pending_w;
2761 w_->pending = 0;
2762 return p->events;
2763 }
2764 else
2765 return 0;
2766}
2767
2768inline_size void
2769pri_adjust (EV_P_ W w)
2770{
2771 int pri = ev_priority (w);
2772 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2773 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2774 ev_set_priority (w, pri);
2775}
2776
2777inline_speed void
2778ev_start (EV_P_ W w, int active)
2779{
2780 pri_adjust (EV_A_ w);
2781 w->active = active;
2782 ev_ref (EV_A);
2783}
2784
2785inline_size void
2786ev_stop (EV_P_ W w)
2787{
2788 ev_unref (EV_A);
2789 w->active = 0;
2790}
2791
2792/*****************************************************************************/
2793
2794void noinline
2795ev_io_start (EV_P_ ev_io *w)
2796{
2797 int fd = w->fd;
2798
2799 if (expect_false (ev_is_active (w)))
2800 return;
2801
2802 assert (("libev: ev_io_start called with negative fd", fd >= 0));
2803 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2804
2805 EV_FREQUENT_CHECK;
2806
2807 ev_start (EV_A_ (W)w, 1);
2808 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2809 wlist_add (&anfds[fd].head, (WL)w);
2810
2811 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2812 w->events &= ~EV__IOFDSET;
2813
2814 EV_FREQUENT_CHECK;
2815}
2816
2817void noinline
2818ev_io_stop (EV_P_ ev_io *w)
2819{
2820 clear_pending (EV_A_ (W)w);
2821 if (expect_false (!ev_is_active (w)))
2822 return;
2823
2824 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2825
2826 EV_FREQUENT_CHECK;
2827
2828 wlist_del (&anfds[w->fd].head, (WL)w);
2829 ev_stop (EV_A_ (W)w);
2830
2831 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2832
2833 EV_FREQUENT_CHECK;
2834}
2835
2836void noinline
2837ev_timer_start (EV_P_ ev_timer *w)
2838{
2839 if (expect_false (ev_is_active (w)))
2840 return;
2841
2842 ev_at (w) += mn_now;
2843
2844 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2845
2846 EV_FREQUENT_CHECK;
2847
2848 ++timercnt;
2849 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2850 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
2851 ANHE_w (timers [ev_active (w)]) = (WT)w;
2852 ANHE_at_cache (timers [ev_active (w)]);
2853 upheap (timers, ev_active (w));
2854
2855 EV_FREQUENT_CHECK;
2856
2857 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2858}
2859
2860void noinline
2861ev_timer_stop (EV_P_ ev_timer *w)
2862{
2863 clear_pending (EV_A_ (W)w);
2864 if (expect_false (!ev_is_active (w)))
2865 return;
2866
2867 EV_FREQUENT_CHECK;
2868
2869 {
2870 int active = ev_active (w);
2871
2872 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2873
2874 --timercnt;
2875
2876 if (expect_true (active < timercnt + HEAP0))
620 { 2877 {
621 struct ev_timer *w = timers [0]; 2878 timers [active] = timers [timercnt + HEAP0];
2879 adjustheap (timers, timercnt, active);
2880 }
2881 }
622 2882
623 /* first reschedule or stop timer */ 2883 ev_at (w) -= mn_now;
2884
2885 ev_stop (EV_A_ (W)w);
2886
2887 EV_FREQUENT_CHECK;
2888}
2889
2890void noinline
2891ev_timer_again (EV_P_ ev_timer *w)
2892{
2893 EV_FREQUENT_CHECK;
2894
2895 if (ev_is_active (w))
2896 {
624 if (w->repeat) 2897 if (w->repeat)
625 { 2898 {
626 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
627 w->at = now + w->repeat; 2899 ev_at (w) = mn_now + w->repeat;
628 downheap ((WT *)timers, timercnt, 0); 2900 ANHE_at_cache (timers [ev_active (w)]);
2901 adjustheap (timers, timercnt, ev_active (w));
629 } 2902 }
630 else 2903 else
631 ev_timer_stop (w); /* nonrepeating: stop timer */ 2904 ev_timer_stop (EV_A_ w);
632
633 event ((W)w, EV_TIMEOUT);
634 }
635}
636
637static void
638periodics_reify (void)
639{
640 while (periodiccnt && periodics [0]->at <= ev_now)
641 { 2905 }
642 struct ev_periodic *w = periodics [0]; 2906 else if (w->repeat)
2907 {
2908 ev_at (w) = w->repeat;
2909 ev_timer_start (EV_A_ w);
2910 }
643 2911
644 /* first reschedule or stop timer */ 2912 EV_FREQUENT_CHECK;
2913}
2914
2915ev_tstamp
2916ev_timer_remaining (EV_P_ ev_timer *w)
2917{
2918 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2919}
2920
2921#if EV_PERIODIC_ENABLE
2922void noinline
2923ev_periodic_start (EV_P_ ev_periodic *w)
2924{
2925 if (expect_false (ev_is_active (w)))
2926 return;
2927
2928 if (w->reschedule_cb)
2929 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
645 if (w->interval) 2930 else if (w->interval)
2931 {
2932 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2933 periodic_recalc (EV_A_ w);
2934 }
2935 else
2936 ev_at (w) = w->offset;
2937
2938 EV_FREQUENT_CHECK;
2939
2940 ++periodiccnt;
2941 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2942 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
2943 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2944 ANHE_at_cache (periodics [ev_active (w)]);
2945 upheap (periodics, ev_active (w));
2946
2947 EV_FREQUENT_CHECK;
2948
2949 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2950}
2951
2952void noinline
2953ev_periodic_stop (EV_P_ ev_periodic *w)
2954{
2955 clear_pending (EV_A_ (W)w);
2956 if (expect_false (!ev_is_active (w)))
2957 return;
2958
2959 EV_FREQUENT_CHECK;
2960
2961 {
2962 int active = ev_active (w);
2963
2964 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2965
2966 --periodiccnt;
2967
2968 if (expect_true (active < periodiccnt + HEAP0))
2969 {
2970 periodics [active] = periodics [periodiccnt + HEAP0];
2971 adjustheap (periodics, periodiccnt, active);
2972 }
2973 }
2974
2975 ev_stop (EV_A_ (W)w);
2976
2977 EV_FREQUENT_CHECK;
2978}
2979
2980void noinline
2981ev_periodic_again (EV_P_ ev_periodic *w)
2982{
2983 /* TODO: use adjustheap and recalculation */
2984 ev_periodic_stop (EV_A_ w);
2985 ev_periodic_start (EV_A_ w);
2986}
2987#endif
2988
2989#ifndef SA_RESTART
2990# define SA_RESTART 0
2991#endif
2992
2993#if EV_SIGNAL_ENABLE
2994
2995void noinline
2996ev_signal_start (EV_P_ ev_signal *w)
2997{
2998 if (expect_false (ev_is_active (w)))
2999 return;
3000
3001 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3002
3003#if EV_MULTIPLICITY
3004 assert (("libev: a signal must not be attached to two different loops",
3005 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3006
3007 signals [w->signum - 1].loop = EV_A;
3008#endif
3009
3010 EV_FREQUENT_CHECK;
3011
3012#if EV_USE_SIGNALFD
3013 if (sigfd == -2)
3014 {
3015 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3016 if (sigfd < 0 && errno == EINVAL)
3017 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3018
3019 if (sigfd >= 0)
646 { 3020 {
647 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 3021 fd_intern (sigfd); /* doing it twice will not hurt */
648 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); 3022
649 downheap ((WT *)periodics, periodiccnt, 0); 3023 sigemptyset (&sigfd_set);
3024
3025 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3026 ev_set_priority (&sigfd_w, EV_MAXPRI);
3027 ev_io_start (EV_A_ &sigfd_w);
3028 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3029 }
3030 }
3031
3032 if (sigfd >= 0)
3033 {
3034 /* TODO: check .head */
3035 sigaddset (&sigfd_set, w->signum);
3036 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3037
3038 signalfd (sigfd, &sigfd_set, 0);
3039 }
3040#endif
3041
3042 ev_start (EV_A_ (W)w, 1);
3043 wlist_add (&signals [w->signum - 1].head, (WL)w);
3044
3045 if (!((WL)w)->next)
3046# if EV_USE_SIGNALFD
3047 if (sigfd < 0) /*TODO*/
3048# endif
3049 {
3050# ifdef _WIN32
3051 evpipe_init (EV_A);
3052
3053 signal (w->signum, ev_sighandler);
3054# else
3055 struct sigaction sa;
3056
3057 evpipe_init (EV_A);
3058
3059 sa.sa_handler = ev_sighandler;
3060 sigfillset (&sa.sa_mask);
3061 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3062 sigaction (w->signum, &sa, 0);
3063
3064 if (origflags & EVFLAG_NOSIGMASK)
3065 {
3066 sigemptyset (&sa.sa_mask);
3067 sigaddset (&sa.sa_mask, w->signum);
3068 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3069 }
3070#endif
3071 }
3072
3073 EV_FREQUENT_CHECK;
3074}
3075
3076void noinline
3077ev_signal_stop (EV_P_ ev_signal *w)
3078{
3079 clear_pending (EV_A_ (W)w);
3080 if (expect_false (!ev_is_active (w)))
3081 return;
3082
3083 EV_FREQUENT_CHECK;
3084
3085 wlist_del (&signals [w->signum - 1].head, (WL)w);
3086 ev_stop (EV_A_ (W)w);
3087
3088 if (!signals [w->signum - 1].head)
3089 {
3090#if EV_MULTIPLICITY
3091 signals [w->signum - 1].loop = 0; /* unattach from signal */
3092#endif
3093#if EV_USE_SIGNALFD
3094 if (sigfd >= 0)
3095 {
3096 sigset_t ss;
3097
3098 sigemptyset (&ss);
3099 sigaddset (&ss, w->signum);
3100 sigdelset (&sigfd_set, w->signum);
3101
3102 signalfd (sigfd, &sigfd_set, 0);
3103 sigprocmask (SIG_UNBLOCK, &ss, 0);
650 } 3104 }
651 else 3105 else
652 ev_periodic_stop (w); /* nonrepeating: stop timer */ 3106#endif
653 3107 signal (w->signum, SIG_DFL);
654 event ((W)w, EV_PERIODIC);
655 }
656}
657
658static void
659periodics_reschedule (ev_tstamp diff)
660{
661 int i;
662
663 /* adjust periodics after time jump */
664 for (i = 0; i < periodiccnt; ++i)
665 { 3108 }
666 struct ev_periodic *w = periodics [i];
667 3109
668 if (w->interval) 3110 EV_FREQUENT_CHECK;
3111}
3112
3113#endif
3114
3115#if EV_CHILD_ENABLE
3116
3117void
3118ev_child_start (EV_P_ ev_child *w)
3119{
3120#if EV_MULTIPLICITY
3121 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3122#endif
3123 if (expect_false (ev_is_active (w)))
3124 return;
3125
3126 EV_FREQUENT_CHECK;
3127
3128 ev_start (EV_A_ (W)w, 1);
3129 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3130
3131 EV_FREQUENT_CHECK;
3132}
3133
3134void
3135ev_child_stop (EV_P_ ev_child *w)
3136{
3137 clear_pending (EV_A_ (W)w);
3138 if (expect_false (!ev_is_active (w)))
3139 return;
3140
3141 EV_FREQUENT_CHECK;
3142
3143 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3144 ev_stop (EV_A_ (W)w);
3145
3146 EV_FREQUENT_CHECK;
3147}
3148
3149#endif
3150
3151#if EV_STAT_ENABLE
3152
3153# ifdef _WIN32
3154# undef lstat
3155# define lstat(a,b) _stati64 (a,b)
3156# endif
3157
3158#define DEF_STAT_INTERVAL 5.0074891
3159#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3160#define MIN_STAT_INTERVAL 0.1074891
3161
3162static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3163
3164#if EV_USE_INOTIFY
3165
3166/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3167# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3168
3169static void noinline
3170infy_add (EV_P_ ev_stat *w)
3171{
3172 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);
3173
3174 if (w->wd >= 0)
3175 {
3176 struct statfs sfs;
3177
3178 /* now local changes will be tracked by inotify, but remote changes won't */
3179 /* unless the filesystem is known to be local, we therefore still poll */
3180 /* also do poll on <2.6.25, but with normal frequency */
3181
3182 if (!fs_2625)
3183 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3184 else if (!statfs (w->path, &sfs)
3185 && (sfs.f_type == 0x1373 /* devfs */
3186 || sfs.f_type == 0xEF53 /* ext2/3 */
3187 || sfs.f_type == 0x3153464a /* jfs */
3188 || sfs.f_type == 0x52654973 /* reiser3 */
3189 || sfs.f_type == 0x01021994 /* tempfs */
3190 || sfs.f_type == 0x58465342 /* xfs */))
3191 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3192 else
3193 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3194 }
3195 else
3196 {
3197 /* can't use inotify, continue to stat */
3198 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3199
3200 /* if path is not there, monitor some parent directory for speedup hints */
3201 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3202 /* but an efficiency issue only */
3203 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
669 { 3204 {
670 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 3205 char path [4096];
3206 strcpy (path, w->path);
671 3207
672 if (fabs (diff) >= 1e-4) 3208 do
673 { 3209 {
674 ev_periodic_stop (w); 3210 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
675 ev_periodic_start (w); 3211 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
676 3212
677 i = 0; /* restart loop, inefficient, but time jumps should be rare */ 3213 char *pend = strrchr (path, '/');
3214
3215 if (!pend || pend == path)
3216 break;
3217
3218 *pend = 0;
3219 w->wd = inotify_add_watch (fs_fd, path, mask);
3220 }
3221 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3222 }
3223 }
3224
3225 if (w->wd >= 0)
3226 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3227
3228 /* now re-arm timer, if required */
3229 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3230 ev_timer_again (EV_A_ &w->timer);
3231 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3232}
3233
3234static void noinline
3235infy_del (EV_P_ ev_stat *w)
3236{
3237 int slot;
3238 int wd = w->wd;
3239
3240 if (wd < 0)
3241 return;
3242
3243 w->wd = -2;
3244 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3245 wlist_del (&fs_hash [slot].head, (WL)w);
3246
3247 /* remove this watcher, if others are watching it, they will rearm */
3248 inotify_rm_watch (fs_fd, wd);
3249}
3250
3251static void noinline
3252infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3253{
3254 if (slot < 0)
3255 /* overflow, need to check for all hash slots */
3256 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3257 infy_wd (EV_A_ slot, wd, ev);
3258 else
3259 {
3260 WL w_;
3261
3262 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3263 {
3264 ev_stat *w = (ev_stat *)w_;
3265 w_ = w_->next; /* lets us remove this watcher and all before it */
3266
3267 if (w->wd == wd || wd == -1)
3268 {
3269 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3270 {
3271 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3272 w->wd = -1;
3273 infy_add (EV_A_ w); /* re-add, no matter what */
3274 }
3275
3276 stat_timer_cb (EV_A_ &w->timer, 0);
678 } 3277 }
679 } 3278 }
680 } 3279 }
681} 3280}
682 3281
683static int 3282static void
684time_update_monotonic (void) 3283infy_cb (EV_P_ ev_io *w, int revents)
685{ 3284{
686 now = get_clock (); 3285 char buf [EV_INOTIFY_BUFSIZE];
3286 int ofs;
3287 int len = read (fs_fd, buf, sizeof (buf));
687 3288
688 if (expect_true (now - now_floor < MIN_TIMEJUMP * .5)) 3289 for (ofs = 0; ofs < len; )
3290 {
3291 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3292 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3293 ofs += sizeof (struct inotify_event) + ev->len;
689 { 3294 }
690 ev_now = now + diff; 3295}
3296
3297inline_size void ecb_cold
3298ev_check_2625 (EV_P)
3299{
3300 /* kernels < 2.6.25 are borked
3301 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3302 */
3303 if (ev_linux_version () < 0x020619)
691 return 0; 3304 return;
3305
3306 fs_2625 = 1;
3307}
3308
3309inline_size int
3310infy_newfd (void)
3311{
3312#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK)
3313 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3314 if (fd >= 0)
3315 return fd;
3316#endif
3317 return inotify_init ();
3318}
3319
3320inline_size void
3321infy_init (EV_P)
3322{
3323 if (fs_fd != -2)
3324 return;
3325
3326 fs_fd = -1;
3327
3328 ev_check_2625 (EV_A);
3329
3330 fs_fd = infy_newfd ();
3331
3332 if (fs_fd >= 0)
692 } 3333 {
3334 fd_intern (fs_fd);
3335 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3336 ev_set_priority (&fs_w, EV_MAXPRI);
3337 ev_io_start (EV_A_ &fs_w);
3338 ev_unref (EV_A);
3339 }
3340}
3341
3342inline_size void
3343infy_fork (EV_P)
3344{
3345 int slot;
3346
3347 if (fs_fd < 0)
3348 return;
3349
3350 ev_ref (EV_A);
3351 ev_io_stop (EV_A_ &fs_w);
3352 close (fs_fd);
3353 fs_fd = infy_newfd ();
3354
3355 if (fs_fd >= 0)
3356 {
3357 fd_intern (fs_fd);
3358 ev_io_set (&fs_w, fs_fd, EV_READ);
3359 ev_io_start (EV_A_ &fs_w);
3360 ev_unref (EV_A);
3361 }
3362
3363 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3364 {
3365 WL w_ = fs_hash [slot].head;
3366 fs_hash [slot].head = 0;
3367
3368 while (w_)
3369 {
3370 ev_stat *w = (ev_stat *)w_;
3371 w_ = w_->next; /* lets us add this watcher */
3372
3373 w->wd = -1;
3374
3375 if (fs_fd >= 0)
3376 infy_add (EV_A_ w); /* re-add, no matter what */
3377 else
3378 {
3379 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3380 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3381 ev_timer_again (EV_A_ &w->timer);
3382 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3383 }
3384 }
3385 }
3386}
3387
3388#endif
3389
3390#ifdef _WIN32
3391# define EV_LSTAT(p,b) _stati64 (p, b)
3392#else
3393# define EV_LSTAT(p,b) lstat (p, b)
3394#endif
3395
3396void
3397ev_stat_stat (EV_P_ ev_stat *w)
3398{
3399 if (lstat (w->path, &w->attr) < 0)
3400 w->attr.st_nlink = 0;
3401 else if (!w->attr.st_nlink)
3402 w->attr.st_nlink = 1;
3403}
3404
3405static void noinline
3406stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3407{
3408 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3409
3410 ev_statdata prev = w->attr;
3411 ev_stat_stat (EV_A_ w);
3412
3413 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3414 if (
3415 prev.st_dev != w->attr.st_dev
3416 || prev.st_ino != w->attr.st_ino
3417 || prev.st_mode != w->attr.st_mode
3418 || prev.st_nlink != w->attr.st_nlink
3419 || prev.st_uid != w->attr.st_uid
3420 || prev.st_gid != w->attr.st_gid
3421 || prev.st_rdev != w->attr.st_rdev
3422 || prev.st_size != w->attr.st_size
3423 || prev.st_atime != w->attr.st_atime
3424 || prev.st_mtime != w->attr.st_mtime
3425 || prev.st_ctime != w->attr.st_ctime
3426 ) {
3427 /* we only update w->prev on actual differences */
3428 /* in case we test more often than invoke the callback, */
3429 /* to ensure that prev is always different to attr */
3430 w->prev = prev;
3431
3432 #if EV_USE_INOTIFY
3433 if (fs_fd >= 0)
3434 {
3435 infy_del (EV_A_ w);
3436 infy_add (EV_A_ w);
3437 ev_stat_stat (EV_A_ w); /* avoid race... */
3438 }
3439 #endif
3440
3441 ev_feed_event (EV_A_ w, EV_STAT);
3442 }
3443}
3444
3445void
3446ev_stat_start (EV_P_ ev_stat *w)
3447{
3448 if (expect_false (ev_is_active (w)))
3449 return;
3450
3451 ev_stat_stat (EV_A_ w);
3452
3453 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3454 w->interval = MIN_STAT_INTERVAL;
3455
3456 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3457 ev_set_priority (&w->timer, ev_priority (w));
3458
3459#if EV_USE_INOTIFY
3460 infy_init (EV_A);
3461
3462 if (fs_fd >= 0)
3463 infy_add (EV_A_ w);
693 else 3464 else
3465#endif
3466 {
3467 ev_timer_again (EV_A_ &w->timer);
3468 ev_unref (EV_A);
694 { 3469 }
695 now_floor = now; 3470
696 ev_now = ev_time (); 3471 ev_start (EV_A_ (W)w, 1);
3472
3473 EV_FREQUENT_CHECK;
3474}
3475
3476void
3477ev_stat_stop (EV_P_ ev_stat *w)
3478{
3479 clear_pending (EV_A_ (W)w);
3480 if (expect_false (!ev_is_active (w)))
697 return 1; 3481 return;
3482
3483 EV_FREQUENT_CHECK;
3484
3485#if EV_USE_INOTIFY
3486 infy_del (EV_A_ w);
3487#endif
3488
3489 if (ev_is_active (&w->timer))
698 } 3490 {
3491 ev_ref (EV_A);
3492 ev_timer_stop (EV_A_ &w->timer);
3493 }
3494
3495 ev_stop (EV_A_ (W)w);
3496
3497 EV_FREQUENT_CHECK;
3498}
3499#endif
3500
3501#if EV_IDLE_ENABLE
3502void
3503ev_idle_start (EV_P_ ev_idle *w)
3504{
3505 if (expect_false (ev_is_active (w)))
3506 return;
3507
3508 pri_adjust (EV_A_ (W)w);
3509
3510 EV_FREQUENT_CHECK;
3511
3512 {
3513 int active = ++idlecnt [ABSPRI (w)];
3514
3515 ++idleall;
3516 ev_start (EV_A_ (W)w, active);
3517
3518 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
3519 idles [ABSPRI (w)][active - 1] = w;
3520 }
3521
3522 EV_FREQUENT_CHECK;
3523}
3524
3525void
3526ev_idle_stop (EV_P_ ev_idle *w)
3527{
3528 clear_pending (EV_A_ (W)w);
3529 if (expect_false (!ev_is_active (w)))
3530 return;
3531
3532 EV_FREQUENT_CHECK;
3533
3534 {
3535 int active = ev_active (w);
3536
3537 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
3538 ev_active (idles [ABSPRI (w)][active - 1]) = active;
3539
3540 ev_stop (EV_A_ (W)w);
3541 --idleall;
3542 }
3543
3544 EV_FREQUENT_CHECK;
3545}
3546#endif
3547
3548#if EV_PREPARE_ENABLE
3549void
3550ev_prepare_start (EV_P_ ev_prepare *w)
3551{
3552 if (expect_false (ev_is_active (w)))
3553 return;
3554
3555 EV_FREQUENT_CHECK;
3556
3557 ev_start (EV_A_ (W)w, ++preparecnt);
3558 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
3559 prepares [preparecnt - 1] = w;
3560
3561 EV_FREQUENT_CHECK;
3562}
3563
3564void
3565ev_prepare_stop (EV_P_ ev_prepare *w)
3566{
3567 clear_pending (EV_A_ (W)w);
3568 if (expect_false (!ev_is_active (w)))
3569 return;
3570
3571 EV_FREQUENT_CHECK;
3572
3573 {
3574 int active = ev_active (w);
3575
3576 prepares [active - 1] = prepares [--preparecnt];
3577 ev_active (prepares [active - 1]) = active;
3578 }
3579
3580 ev_stop (EV_A_ (W)w);
3581
3582 EV_FREQUENT_CHECK;
3583}
3584#endif
3585
3586#if EV_CHECK_ENABLE
3587void
3588ev_check_start (EV_P_ ev_check *w)
3589{
3590 if (expect_false (ev_is_active (w)))
3591 return;
3592
3593 EV_FREQUENT_CHECK;
3594
3595 ev_start (EV_A_ (W)w, ++checkcnt);
3596 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
3597 checks [checkcnt - 1] = w;
3598
3599 EV_FREQUENT_CHECK;
3600}
3601
3602void
3603ev_check_stop (EV_P_ ev_check *w)
3604{
3605 clear_pending (EV_A_ (W)w);
3606 if (expect_false (!ev_is_active (w)))
3607 return;
3608
3609 EV_FREQUENT_CHECK;
3610
3611 {
3612 int active = ev_active (w);
3613
3614 checks [active - 1] = checks [--checkcnt];
3615 ev_active (checks [active - 1]) = active;
3616 }
3617
3618 ev_stop (EV_A_ (W)w);
3619
3620 EV_FREQUENT_CHECK;
3621}
3622#endif
3623
3624#if EV_EMBED_ENABLE
3625void noinline
3626ev_embed_sweep (EV_P_ ev_embed *w)
3627{
3628 ev_run (w->other, EVRUN_NOWAIT);
699} 3629}
700 3630
701static void 3631static void
702time_update (void) 3632embed_io_cb (EV_P_ ev_io *io, int revents)
703{ 3633{
704 int i; 3634 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
705 3635
706#if EV_USE_MONOTONIC 3636 if (ev_cb (w))
707 if (expect_true (have_monotonic)) 3637 ev_feed_event (EV_A_ (W)w, EV_EMBED);
708 {
709 if (time_update_monotonic ())
710 {
711 ev_tstamp odiff = diff;
712
713 for (i = 4; --i; ) /* loop a few times, before making important decisions */
714 {
715 diff = ev_now - now;
716
717 if (fabs (odiff - diff) < MIN_TIMEJUMP)
718 return; /* all is well */
719
720 ev_now = ev_time ();
721 now = get_clock ();
722 now_floor = now;
723 }
724
725 periodics_reschedule (diff - odiff);
726 /* no timer adjustment, as the monotonic clock doesn't jump */
727 }
728 }
729 else 3638 else
730#endif 3639 ev_run (w->other, EVRUN_NOWAIT);
3640}
3641
3642static void
3643embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
3644{
3645 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
3646
731 { 3647 {
732 ev_now = ev_time (); 3648 EV_P = w->other;
733 3649
734 if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 3650 while (fdchangecnt)
735 { 3651 {
736 periodics_reschedule (ev_now - now); 3652 fd_reify (EV_A);
737 3653 ev_run (EV_A_ EVRUN_NOWAIT);
738 /* adjust timers. this is easy, as the offset is the same for all */
739 for (i = 0; i < timercnt; ++i)
740 timers [i]->at += diff;
741 } 3654 }
742
743 now = ev_now;
744 } 3655 }
745} 3656}
746 3657
747int ev_loop_done; 3658static void
748 3659embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
749void ev_loop (int flags)
750{ 3660{
751 double block; 3661 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
752 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
753 3662
754 do 3663 ev_embed_stop (EV_A_ w);
3664
755 { 3665 {
756 /* queue check watchers (and execute them) */ 3666 EV_P = w->other;
757 if (expect_false (preparecnt))
758 {
759 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
760 call_pending ();
761 }
762 3667
763 /* update fd-related kernel structures */ 3668 ev_loop_fork (EV_A);
764 fd_reify (); 3669 ev_run (EV_A_ EVRUN_NOWAIT);
765
766 /* calculate blocking time */
767
768 /* we only need this for !monotonic clockor timers, but as we basically
769 always have timers, we just calculate it always */
770#if EV_USE_MONOTONIC
771 if (expect_true (have_monotonic))
772 time_update_monotonic ();
773 else
774#endif
775 {
776 ev_now = ev_time ();
777 now = ev_now;
778 }
779
780 if (flags & EVLOOP_NONBLOCK || idlecnt)
781 block = 0.;
782 else
783 {
784 block = MAX_BLOCKTIME;
785
786 if (timercnt)
787 {
788 ev_tstamp to = timers [0]->at - now + method_fudge;
789 if (block > to) block = to;
790 }
791
792 if (periodiccnt)
793 {
794 ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
795 if (block > to) block = to;
796 }
797
798 if (block < 0.) block = 0.;
799 }
800
801 method_poll (block);
802
803 /* update ev_now, do magic */
804 time_update ();
805
806 /* queue pending timers and reschedule them */
807 timers_reify (); /* relative timers called last */
808 periodics_reify (); /* absolute timers called first */
809
810 /* queue idle watchers unless io or timers are pending */
811 if (!pendingcnt)
812 queue_events ((W *)idles, idlecnt, EV_IDLE);
813
814 /* queue check watchers, to be executed first */
815 if (checkcnt)
816 queue_events ((W *)checks, checkcnt, EV_CHECK);
817
818 call_pending ();
819 } 3670 }
820 while (!ev_loop_done);
821 3671
822 if (ev_loop_done != 2) 3672 ev_embed_start (EV_A_ w);
823 ev_loop_done = 0;
824} 3673}
3674
3675#if 0
3676static void
3677embed_idle_cb (EV_P_ ev_idle *idle, int revents)
3678{
3679 ev_idle_stop (EV_A_ idle);
3680}
3681#endif
3682
3683void
3684ev_embed_start (EV_P_ ev_embed *w)
3685{
3686 if (expect_false (ev_is_active (w)))
3687 return;
3688
3689 {
3690 EV_P = w->other;
3691 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
3692 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
3693 }
3694
3695 EV_FREQUENT_CHECK;
3696
3697 ev_set_priority (&w->io, ev_priority (w));
3698 ev_io_start (EV_A_ &w->io);
3699
3700 ev_prepare_init (&w->prepare, embed_prepare_cb);
3701 ev_set_priority (&w->prepare, EV_MINPRI);
3702 ev_prepare_start (EV_A_ &w->prepare);
3703
3704 ev_fork_init (&w->fork, embed_fork_cb);
3705 ev_fork_start (EV_A_ &w->fork);
3706
3707 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
3708
3709 ev_start (EV_A_ (W)w, 1);
3710
3711 EV_FREQUENT_CHECK;
3712}
3713
3714void
3715ev_embed_stop (EV_P_ ev_embed *w)
3716{
3717 clear_pending (EV_A_ (W)w);
3718 if (expect_false (!ev_is_active (w)))
3719 return;
3720
3721 EV_FREQUENT_CHECK;
3722
3723 ev_io_stop (EV_A_ &w->io);
3724 ev_prepare_stop (EV_A_ &w->prepare);
3725 ev_fork_stop (EV_A_ &w->fork);
3726
3727 ev_stop (EV_A_ (W)w);
3728
3729 EV_FREQUENT_CHECK;
3730}
3731#endif
3732
3733#if EV_FORK_ENABLE
3734void
3735ev_fork_start (EV_P_ ev_fork *w)
3736{
3737 if (expect_false (ev_is_active (w)))
3738 return;
3739
3740 EV_FREQUENT_CHECK;
3741
3742 ev_start (EV_A_ (W)w, ++forkcnt);
3743 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
3744 forks [forkcnt - 1] = w;
3745
3746 EV_FREQUENT_CHECK;
3747}
3748
3749void
3750ev_fork_stop (EV_P_ ev_fork *w)
3751{
3752 clear_pending (EV_A_ (W)w);
3753 if (expect_false (!ev_is_active (w)))
3754 return;
3755
3756 EV_FREQUENT_CHECK;
3757
3758 {
3759 int active = ev_active (w);
3760
3761 forks [active - 1] = forks [--forkcnt];
3762 ev_active (forks [active - 1]) = active;
3763 }
3764
3765 ev_stop (EV_A_ (W)w);
3766
3767 EV_FREQUENT_CHECK;
3768}
3769#endif
3770
3771#if EV_CLEANUP_ENABLE
3772void
3773ev_cleanup_start (EV_P_ ev_cleanup *w)
3774{
3775 if (expect_false (ev_is_active (w)))
3776 return;
3777
3778 EV_FREQUENT_CHECK;
3779
3780 ev_start (EV_A_ (W)w, ++cleanupcnt);
3781 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
3782 cleanups [cleanupcnt - 1] = w;
3783
3784 /* cleanup watchers should never keep a refcount on the loop */
3785 ev_unref (EV_A);
3786 EV_FREQUENT_CHECK;
3787}
3788
3789void
3790ev_cleanup_stop (EV_P_ ev_cleanup *w)
3791{
3792 clear_pending (EV_A_ (W)w);
3793 if (expect_false (!ev_is_active (w)))
3794 return;
3795
3796 EV_FREQUENT_CHECK;
3797 ev_ref (EV_A);
3798
3799 {
3800 int active = ev_active (w);
3801
3802 cleanups [active - 1] = cleanups [--cleanupcnt];
3803 ev_active (cleanups [active - 1]) = active;
3804 }
3805
3806 ev_stop (EV_A_ (W)w);
3807
3808 EV_FREQUENT_CHECK;
3809}
3810#endif
3811
3812#if EV_ASYNC_ENABLE
3813void
3814ev_async_start (EV_P_ ev_async *w)
3815{
3816 if (expect_false (ev_is_active (w)))
3817 return;
3818
3819 w->sent = 0;
3820
3821 evpipe_init (EV_A);
3822
3823 EV_FREQUENT_CHECK;
3824
3825 ev_start (EV_A_ (W)w, ++asynccnt);
3826 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
3827 asyncs [asynccnt - 1] = w;
3828
3829 EV_FREQUENT_CHECK;
3830}
3831
3832void
3833ev_async_stop (EV_P_ ev_async *w)
3834{
3835 clear_pending (EV_A_ (W)w);
3836 if (expect_false (!ev_is_active (w)))
3837 return;
3838
3839 EV_FREQUENT_CHECK;
3840
3841 {
3842 int active = ev_active (w);
3843
3844 asyncs [active - 1] = asyncs [--asynccnt];
3845 ev_active (asyncs [active - 1]) = active;
3846 }
3847
3848 ev_stop (EV_A_ (W)w);
3849
3850 EV_FREQUENT_CHECK;
3851}
3852
3853void
3854ev_async_send (EV_P_ ev_async *w)
3855{
3856 w->sent = 1;
3857 evpipe_write (EV_A_ &async_pending);
3858}
3859#endif
825 3860
826/*****************************************************************************/ 3861/*****************************************************************************/
827 3862
828static void
829wlist_add (WL *head, WL elem)
830{
831 elem->next = *head;
832 *head = elem;
833}
834
835static void
836wlist_del (WL *head, WL elem)
837{
838 while (*head)
839 {
840 if (*head == elem)
841 {
842 *head = elem->next;
843 return;
844 }
845
846 head = &(*head)->next;
847 }
848}
849
850static void
851ev_clear_pending (W w)
852{
853 if (w->pending)
854 {
855 pendings [ABSPRI (w)][w->pending - 1].w = 0;
856 w->pending = 0;
857 }
858}
859
860static void
861ev_start (W w, int active)
862{
863 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
864 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
865
866 w->active = active;
867}
868
869static void
870ev_stop (W w)
871{
872 w->active = 0;
873}
874
875/*****************************************************************************/
876
877void
878ev_io_start (struct ev_io *w)
879{
880 int fd = w->fd;
881
882 if (ev_is_active (w))
883 return;
884
885 assert (("ev_io_start called with negative fd", fd >= 0));
886
887 ev_start ((W)w, 1);
888 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
889 wlist_add ((WL *)&anfds[fd].head, (WL)w);
890
891 fd_change (fd);
892}
893
894void
895ev_io_stop (struct ev_io *w)
896{
897 ev_clear_pending ((W)w);
898 if (!ev_is_active (w))
899 return;
900
901 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
902 ev_stop ((W)w);
903
904 fd_change (w->fd);
905}
906
907void
908ev_timer_start (struct ev_timer *w)
909{
910 if (ev_is_active (w))
911 return;
912
913 w->at += now;
914
915 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
916
917 ev_start ((W)w, ++timercnt);
918 array_needsize (timers, timermax, timercnt, );
919 timers [timercnt - 1] = w;
920 upheap ((WT *)timers, timercnt - 1);
921}
922
923void
924ev_timer_stop (struct ev_timer *w)
925{
926 ev_clear_pending ((W)w);
927 if (!ev_is_active (w))
928 return;
929
930 if (w->active < timercnt--)
931 {
932 timers [w->active - 1] = timers [timercnt];
933 downheap ((WT *)timers, timercnt, w->active - 1);
934 }
935
936 w->at = w->repeat;
937
938 ev_stop ((W)w);
939}
940
941void
942ev_timer_again (struct ev_timer *w)
943{
944 if (ev_is_active (w))
945 {
946 if (w->repeat)
947 {
948 w->at = now + w->repeat;
949 downheap ((WT *)timers, timercnt, w->active - 1);
950 }
951 else
952 ev_timer_stop (w);
953 }
954 else if (w->repeat)
955 ev_timer_start (w);
956}
957
958void
959ev_periodic_start (struct ev_periodic *w)
960{
961 if (ev_is_active (w))
962 return;
963
964 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
965
966 /* this formula differs from the one in periodic_reify because we do not always round up */
967 if (w->interval)
968 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
969
970 ev_start ((W)w, ++periodiccnt);
971 array_needsize (periodics, periodicmax, periodiccnt, );
972 periodics [periodiccnt - 1] = w;
973 upheap ((WT *)periodics, periodiccnt - 1);
974}
975
976void
977ev_periodic_stop (struct ev_periodic *w)
978{
979 ev_clear_pending ((W)w);
980 if (!ev_is_active (w))
981 return;
982
983 if (w->active < periodiccnt--)
984 {
985 periodics [w->active - 1] = periodics [periodiccnt];
986 downheap ((WT *)periodics, periodiccnt, w->active - 1);
987 }
988
989 ev_stop ((W)w);
990}
991
992void
993ev_signal_start (struct ev_signal *w)
994{
995 if (ev_is_active (w))
996 return;
997
998 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
999
1000 ev_start ((W)w, 1);
1001 array_needsize (signals, signalmax, w->signum, signals_init);
1002 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1003
1004 if (!w->next)
1005 {
1006 struct sigaction sa;
1007 sa.sa_handler = sighandler;
1008 sigfillset (&sa.sa_mask);
1009 sa.sa_flags = 0;
1010 sigaction (w->signum, &sa, 0);
1011 }
1012}
1013
1014void
1015ev_signal_stop (struct ev_signal *w)
1016{
1017 ev_clear_pending ((W)w);
1018 if (!ev_is_active (w))
1019 return;
1020
1021 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1022 ev_stop ((W)w);
1023
1024 if (!signals [w->signum - 1].head)
1025 signal (w->signum, SIG_DFL);
1026}
1027
1028void
1029ev_idle_start (struct ev_idle *w)
1030{
1031 if (ev_is_active (w))
1032 return;
1033
1034 ev_start ((W)w, ++idlecnt);
1035 array_needsize (idles, idlemax, idlecnt, );
1036 idles [idlecnt - 1] = w;
1037}
1038
1039void
1040ev_idle_stop (struct ev_idle *w)
1041{
1042 ev_clear_pending ((W)w);
1043 if (ev_is_active (w))
1044 return;
1045
1046 idles [w->active - 1] = idles [--idlecnt];
1047 ev_stop ((W)w);
1048}
1049
1050void
1051ev_prepare_start (struct ev_prepare *w)
1052{
1053 if (ev_is_active (w))
1054 return;
1055
1056 ev_start ((W)w, ++preparecnt);
1057 array_needsize (prepares, preparemax, preparecnt, );
1058 prepares [preparecnt - 1] = w;
1059}
1060
1061void
1062ev_prepare_stop (struct ev_prepare *w)
1063{
1064 ev_clear_pending ((W)w);
1065 if (ev_is_active (w))
1066 return;
1067
1068 prepares [w->active - 1] = prepares [--preparecnt];
1069 ev_stop ((W)w);
1070}
1071
1072void
1073ev_check_start (struct ev_check *w)
1074{
1075 if (ev_is_active (w))
1076 return;
1077
1078 ev_start ((W)w, ++checkcnt);
1079 array_needsize (checks, checkmax, checkcnt, );
1080 checks [checkcnt - 1] = w;
1081}
1082
1083void
1084ev_check_stop (struct ev_check *w)
1085{
1086 ev_clear_pending ((W)w);
1087 if (ev_is_active (w))
1088 return;
1089
1090 checks [w->active - 1] = checks [--checkcnt];
1091 ev_stop ((W)w);
1092}
1093
1094void
1095ev_child_start (struct ev_child *w)
1096{
1097 if (ev_is_active (w))
1098 return;
1099
1100 ev_start ((W)w, 1);
1101 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1102}
1103
1104void
1105ev_child_stop (struct ev_child *w)
1106{
1107 ev_clear_pending ((W)w);
1108 if (ev_is_active (w))
1109 return;
1110
1111 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1112 ev_stop ((W)w);
1113}
1114
1115/*****************************************************************************/
1116
1117struct ev_once 3863struct ev_once
1118{ 3864{
1119 struct ev_io io; 3865 ev_io io;
1120 struct ev_timer to; 3866 ev_timer to;
1121 void (*cb)(int revents, void *arg); 3867 void (*cb)(int revents, void *arg);
1122 void *arg; 3868 void *arg;
1123}; 3869};
1124 3870
1125static void 3871static void
1126once_cb (struct ev_once *once, int revents) 3872once_cb (EV_P_ struct ev_once *once, int revents)
1127{ 3873{
1128 void (*cb)(int revents, void *arg) = once->cb; 3874 void (*cb)(int revents, void *arg) = once->cb;
1129 void *arg = once->arg; 3875 void *arg = once->arg;
1130 3876
1131 ev_io_stop (&once->io); 3877 ev_io_stop (EV_A_ &once->io);
1132 ev_timer_stop (&once->to); 3878 ev_timer_stop (EV_A_ &once->to);
1133 free (once); 3879 ev_free (once);
1134 3880
1135 cb (revents, arg); 3881 cb (revents, arg);
1136} 3882}
1137 3883
1138static void 3884static void
1139once_cb_io (struct ev_io *w, int revents) 3885once_cb_io (EV_P_ ev_io *w, int revents)
1140{ 3886{
1141 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 3887 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
3888
3889 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1142} 3890}
1143 3891
1144static void 3892static void
1145once_cb_to (struct ev_timer *w, int revents) 3893once_cb_to (EV_P_ ev_timer *w, int revents)
1146{ 3894{
1147 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 3895 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3896
3897 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1148} 3898}
1149 3899
1150void 3900void
1151ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 3901ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1152{ 3902{
1153 struct ev_once *once = malloc (sizeof (struct ev_once)); 3903 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1154 3904
1155 if (!once) 3905 if (expect_false (!once))
3906 {
1156 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 3907 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1157 else 3908 return;
1158 { 3909 }
3910
1159 once->cb = cb; 3911 once->cb = cb;
1160 once->arg = arg; 3912 once->arg = arg;
1161 3913
1162 ev_watcher_init (&once->io, once_cb_io); 3914 ev_init (&once->io, once_cb_io);
1163 if (fd >= 0) 3915 if (fd >= 0)
3916 {
3917 ev_io_set (&once->io, fd, events);
3918 ev_io_start (EV_A_ &once->io);
3919 }
3920
3921 ev_init (&once->to, once_cb_to);
3922 if (timeout >= 0.)
3923 {
3924 ev_timer_set (&once->to, timeout, 0.);
3925 ev_timer_start (EV_A_ &once->to);
3926 }
3927}
3928
3929/*****************************************************************************/
3930
3931#if EV_WALK_ENABLE
3932void ecb_cold
3933ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w))
3934{
3935 int i, j;
3936 ev_watcher_list *wl, *wn;
3937
3938 if (types & (EV_IO | EV_EMBED))
3939 for (i = 0; i < anfdmax; ++i)
3940 for (wl = anfds [i].head; wl; )
1164 { 3941 {
1165 ev_io_set (&once->io, fd, events); 3942 wn = wl->next;
1166 ev_io_start (&once->io); 3943
3944#if EV_EMBED_ENABLE
3945 if (ev_cb ((ev_io *)wl) == embed_io_cb)
3946 {
3947 if (types & EV_EMBED)
3948 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
3949 }
3950 else
3951#endif
3952#if EV_USE_INOTIFY
3953 if (ev_cb ((ev_io *)wl) == infy_cb)
3954 ;
3955 else
3956#endif
3957 if ((ev_io *)wl != &pipe_w)
3958 if (types & EV_IO)
3959 cb (EV_A_ EV_IO, wl);
3960
3961 wl = wn;
1167 } 3962 }
1168 3963
1169 ev_watcher_init (&once->to, once_cb_to); 3964 if (types & (EV_TIMER | EV_STAT))
1170 if (timeout >= 0.) 3965 for (i = timercnt + HEAP0; i-- > HEAP0; )
3966#if EV_STAT_ENABLE
3967 /*TODO: timer is not always active*/
3968 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1171 { 3969 {
1172 ev_timer_set (&once->to, timeout, 0.); 3970 if (types & EV_STAT)
1173 ev_timer_start (&once->to); 3971 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1174 } 3972 }
1175 } 3973 else
1176} 3974#endif
3975 if (types & EV_TIMER)
3976 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1177 3977
1178/*****************************************************************************/ 3978#if EV_PERIODIC_ENABLE
3979 if (types & EV_PERIODIC)
3980 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
3981 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3982#endif
1179 3983
1180#if 0 3984#if EV_IDLE_ENABLE
3985 if (types & EV_IDLE)
3986 for (j = NUMPRI; i--; )
3987 for (i = idlecnt [j]; i--; )
3988 cb (EV_A_ EV_IDLE, idles [j][i]);
3989#endif
1181 3990
1182struct ev_io wio; 3991#if EV_FORK_ENABLE
3992 if (types & EV_FORK)
3993 for (i = forkcnt; i--; )
3994 if (ev_cb (forks [i]) != embed_fork_cb)
3995 cb (EV_A_ EV_FORK, forks [i]);
3996#endif
1183 3997
1184static void 3998#if EV_ASYNC_ENABLE
1185sin_cb (struct ev_io *w, int revents) 3999 if (types & EV_ASYNC)
1186{ 4000 for (i = asynccnt; i--; )
1187 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 4001 cb (EV_A_ EV_ASYNC, asyncs [i]);
1188} 4002#endif
1189 4003
1190static void 4004#if EV_PREPARE_ENABLE
1191ocb (struct ev_timer *w, int revents) 4005 if (types & EV_PREPARE)
1192{ 4006 for (i = preparecnt; i--; )
1193 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 4007# if EV_EMBED_ENABLE
1194 ev_timer_stop (w); 4008 if (ev_cb (prepares [i]) != embed_prepare_cb)
1195 ev_timer_start (w);
1196}
1197
1198static void
1199scb (struct ev_signal *w, int revents)
1200{
1201 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1202 ev_io_stop (&wio);
1203 ev_io_start (&wio);
1204}
1205
1206static void
1207gcb (struct ev_signal *w, int revents)
1208{
1209 fprintf (stderr, "generic %x\n", revents);
1210
1211}
1212
1213int main (void)
1214{
1215 ev_init (0);
1216
1217 ev_io_init (&wio, sin_cb, 0, EV_READ);
1218 ev_io_start (&wio);
1219
1220 struct ev_timer t[10000];
1221
1222#if 0
1223 int i;
1224 for (i = 0; i < 10000; ++i)
1225 {
1226 struct ev_timer *w = t + i;
1227 ev_watcher_init (w, ocb, i);
1228 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1229 ev_timer_start (w);
1230 if (drand48 () < 0.5)
1231 ev_timer_stop (w);
1232 }
1233#endif 4009# endif
1234 4010 cb (EV_A_ EV_PREPARE, prepares [i]);
1235 struct ev_timer t1;
1236 ev_timer_init (&t1, ocb, 5, 10);
1237 ev_timer_start (&t1);
1238
1239 struct ev_signal sig;
1240 ev_signal_init (&sig, scb, SIGQUIT);
1241 ev_signal_start (&sig);
1242
1243 struct ev_check cw;
1244 ev_check_init (&cw, gcb);
1245 ev_check_start (&cw);
1246
1247 struct ev_idle iw;
1248 ev_idle_init (&iw, gcb);
1249 ev_idle_start (&iw);
1250
1251 ev_loop (0);
1252
1253 return 0;
1254}
1255
1256#endif 4011#endif
1257 4012
4013#if EV_CHECK_ENABLE
4014 if (types & EV_CHECK)
4015 for (i = checkcnt; i--; )
4016 cb (EV_A_ EV_CHECK, checks [i]);
4017#endif
1258 4018
4019#if EV_SIGNAL_ENABLE
4020 if (types & EV_SIGNAL)
4021 for (i = 0; i < EV_NSIG - 1; ++i)
4022 for (wl = signals [i].head; wl; )
4023 {
4024 wn = wl->next;
4025 cb (EV_A_ EV_SIGNAL, wl);
4026 wl = wn;
4027 }
4028#endif
1259 4029
4030#if EV_CHILD_ENABLE
4031 if (types & EV_CHILD)
4032 for (i = (EV_PID_HASHSIZE); i--; )
4033 for (wl = childs [i]; wl; )
4034 {
4035 wn = wl->next;
4036 cb (EV_A_ EV_CHILD, wl);
4037 wl = wn;
4038 }
4039#endif
4040/* EV_STAT 0x00001000 /* stat data changed */
4041/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4042}
4043#endif
1260 4044
4045#if EV_MULTIPLICITY
4046 #include "ev_wrap.h"
4047#endif
4048
4049EV_CPP(})
4050

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