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Comparing libev/ev.c (file contents):
Revision 1.44 by root, Fri Nov 2 20:59:14 2007 UTC vs.
Revision 1.448 by root, Tue Jul 24 16:28:08 2012 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) 2007,2008,2009,2010,2011,2012 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
188#if EV_NO_THREADS
189# undef EV_NO_SMP
190# define EV_NO_SMP 1
191# undef ECB_NO_THREADS
192# define ECB_NO_THREADS 1
193#endif
194#if EV_NO_SMP
195# undef EV_NO_SMP
196# define ECB_NO_SMP 1
197#endif
198
199#ifndef _WIN32
200# include <sys/time.h>
201# include <sys/wait.h>
202# include <unistd.h>
203#else
204# include <io.h>
205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
207# include <windows.h>
208# ifndef EV_SELECT_IS_WINSOCKET
209# define EV_SELECT_IS_WINSOCKET 1
210# endif
211# undef EV_AVOID_STDIO
212#endif
213
214/* OS X, in its infinite idiocy, actually HARDCODES
215 * a limit of 1024 into their select. Where people have brains,
216 * OS X engineers apparently have a vacuum. Or maybe they were
217 * ordered to have a vacuum, or they do anything for money.
218 * This might help. Or not.
219 */
220#define _DARWIN_UNLIMITED_SELECT 1
221
222/* this block tries to deduce configuration from header-defined symbols and defaults */
223
224/* try to deduce the maximum number of signals on this platform */
225#if defined EV_NSIG
226/* use what's provided */
227#elif defined NSIG
228# define EV_NSIG (NSIG)
229#elif defined _NSIG
230# define EV_NSIG (_NSIG)
231#elif defined SIGMAX
232# define EV_NSIG (SIGMAX+1)
233#elif defined SIG_MAX
234# define EV_NSIG (SIG_MAX+1)
235#elif defined _SIG_MAX
236# define EV_NSIG (_SIG_MAX+1)
237#elif defined MAXSIG
238# define EV_NSIG (MAXSIG+1)
239#elif defined MAX_SIG
240# define EV_NSIG (MAX_SIG+1)
241#elif defined SIGARRAYSIZE
242# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
243#elif defined _sys_nsig
244# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
245#else
246# error "unable to find value for NSIG, please report"
247/* to make it compile regardless, just remove the above line, */
248/* but consider reporting it, too! :) */
249# define EV_NSIG 65
250#endif
251
252#ifndef EV_USE_FLOOR
253# define EV_USE_FLOOR 0
254#endif
255
256#ifndef EV_USE_CLOCK_SYSCALL
257# if __linux && __GLIBC__ >= 2
258# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
259# else
260# define EV_USE_CLOCK_SYSCALL 0
261# endif
262#endif
52 263
53#ifndef EV_USE_MONOTONIC 264#ifndef EV_USE_MONOTONIC
265# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
266# define EV_USE_MONOTONIC EV_FEATURE_OS
267# else
54# define EV_USE_MONOTONIC 1 268# define EV_USE_MONOTONIC 0
269# endif
270#endif
271
272#ifndef EV_USE_REALTIME
273# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
274#endif
275
276#ifndef EV_USE_NANOSLEEP
277# if _POSIX_C_SOURCE >= 199309L
278# define EV_USE_NANOSLEEP EV_FEATURE_OS
279# else
280# define EV_USE_NANOSLEEP 0
281# endif
55#endif 282#endif
56 283
57#ifndef EV_USE_SELECT 284#ifndef EV_USE_SELECT
58# define EV_USE_SELECT 1 285# define EV_USE_SELECT EV_FEATURE_BACKENDS
59#endif 286#endif
60 287
61#ifndef EV_USE_POLL 288#ifndef EV_USE_POLL
62# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */ 289# ifdef _WIN32
290# define EV_USE_POLL 0
291# else
292# define EV_USE_POLL EV_FEATURE_BACKENDS
293# endif
63#endif 294#endif
64 295
65#ifndef EV_USE_EPOLL 296#ifndef EV_USE_EPOLL
297# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
298# define EV_USE_EPOLL EV_FEATURE_BACKENDS
299# else
66# define EV_USE_EPOLL 0 300# define EV_USE_EPOLL 0
301# endif
67#endif 302#endif
68 303
69#ifndef EV_USE_KQUEUE 304#ifndef EV_USE_KQUEUE
70# define EV_USE_KQUEUE 0 305# define EV_USE_KQUEUE 0
71#endif 306#endif
72 307
73#ifndef EV_USE_REALTIME 308#ifndef EV_USE_PORT
74# define EV_USE_REALTIME 1 309# define EV_USE_PORT 0
310#endif
311
312#ifndef EV_USE_INOTIFY
313# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
314# define EV_USE_INOTIFY EV_FEATURE_OS
315# else
316# define EV_USE_INOTIFY 0
75#endif 317# endif
318#endif
76 319
77/**/ 320#ifndef EV_PID_HASHSIZE
321# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
322#endif
323
324#ifndef EV_INOTIFY_HASHSIZE
325# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
326#endif
327
328#ifndef EV_USE_EVENTFD
329# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
330# define EV_USE_EVENTFD EV_FEATURE_OS
331# else
332# define EV_USE_EVENTFD 0
333# endif
334#endif
335
336#ifndef EV_USE_SIGNALFD
337# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
338# define EV_USE_SIGNALFD EV_FEATURE_OS
339# else
340# define EV_USE_SIGNALFD 0
341# endif
342#endif
343
344#if 0 /* debugging */
345# define EV_VERIFY 3
346# define EV_USE_4HEAP 1
347# define EV_HEAP_CACHE_AT 1
348#endif
349
350#ifndef EV_VERIFY
351# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
352#endif
353
354#ifndef EV_USE_4HEAP
355# define EV_USE_4HEAP EV_FEATURE_DATA
356#endif
357
358#ifndef EV_HEAP_CACHE_AT
359# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
360#endif
361
362/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
363/* which makes programs even slower. might work on other unices, too. */
364#if EV_USE_CLOCK_SYSCALL
365# include <sys/syscall.h>
366# ifdef SYS_clock_gettime
367# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
368# undef EV_USE_MONOTONIC
369# define EV_USE_MONOTONIC 1
370# else
371# undef EV_USE_CLOCK_SYSCALL
372# define EV_USE_CLOCK_SYSCALL 0
373# endif
374#endif
375
376/* this block fixes any misconfiguration where we know we run into trouble otherwise */
377
378#ifdef _AIX
379/* AIX has a completely broken poll.h header */
380# undef EV_USE_POLL
381# define EV_USE_POLL 0
382#endif
78 383
79#ifndef CLOCK_MONOTONIC 384#ifndef CLOCK_MONOTONIC
80# undef EV_USE_MONOTONIC 385# undef EV_USE_MONOTONIC
81# define EV_USE_MONOTONIC 0 386# define EV_USE_MONOTONIC 0
82#endif 387#endif
… …
84#ifndef CLOCK_REALTIME 389#ifndef CLOCK_REALTIME
85# undef EV_USE_REALTIME 390# undef EV_USE_REALTIME
86# define EV_USE_REALTIME 0 391# define EV_USE_REALTIME 0
87#endif 392#endif
88 393
394#if !EV_STAT_ENABLE
395# undef EV_USE_INOTIFY
396# define EV_USE_INOTIFY 0
397#endif
398
399#if !EV_USE_NANOSLEEP
400/* hp-ux has it in sys/time.h, which we unconditionally include above */
401# if !defined _WIN32 && !defined __hpux
402# include <sys/select.h>
403# endif
404#endif
405
406#if EV_USE_INOTIFY
407# include <sys/statfs.h>
408# include <sys/inotify.h>
409/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
410# ifndef IN_DONT_FOLLOW
411# undef EV_USE_INOTIFY
412# define EV_USE_INOTIFY 0
413# endif
414#endif
415
416#if EV_USE_EVENTFD
417/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
418# include <stdint.h>
419# ifndef EFD_NONBLOCK
420# define EFD_NONBLOCK O_NONBLOCK
421# endif
422# ifndef EFD_CLOEXEC
423# ifdef O_CLOEXEC
424# define EFD_CLOEXEC O_CLOEXEC
425# else
426# define EFD_CLOEXEC 02000000
427# endif
428# endif
429EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
430#endif
431
432#if EV_USE_SIGNALFD
433/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
434# include <stdint.h>
435# ifndef SFD_NONBLOCK
436# define SFD_NONBLOCK O_NONBLOCK
437# endif
438# ifndef SFD_CLOEXEC
439# ifdef O_CLOEXEC
440# define SFD_CLOEXEC O_CLOEXEC
441# else
442# define SFD_CLOEXEC 02000000
443# endif
444# endif
445EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
446
447struct signalfd_siginfo
448{
449 uint32_t ssi_signo;
450 char pad[128 - sizeof (uint32_t)];
451};
452#endif
453
89/**/ 454/**/
90 455
456#if EV_VERIFY >= 3
457# define EV_FREQUENT_CHECK ev_verify (EV_A)
458#else
459# define EV_FREQUENT_CHECK do { } while (0)
460#endif
461
462/*
463 * This is used to work around floating point rounding problems.
464 * This value is good at least till the year 4000.
465 */
466#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
467/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
468
91#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 469#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
92#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */ 470#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
93#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
94/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
95 471
96#include "ev.h" 472#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
473#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
97 474
475/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
476/* ECB.H BEGIN */
477/*
478 * libecb - http://software.schmorp.de/pkg/libecb
479 *
480 * Copyright (©) 2009-2012 Marc Alexander Lehmann <libecb@schmorp.de>
481 * Copyright (©) 2011 Emanuele Giaquinta
482 * All rights reserved.
483 *
484 * Redistribution and use in source and binary forms, with or without modifica-
485 * tion, are permitted provided that the following conditions are met:
486 *
487 * 1. Redistributions of source code must retain the above copyright notice,
488 * this list of conditions and the following disclaimer.
489 *
490 * 2. Redistributions in binary form must reproduce the above copyright
491 * notice, this list of conditions and the following disclaimer in the
492 * documentation and/or other materials provided with the distribution.
493 *
494 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
495 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
496 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
497 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
498 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
499 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
500 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
501 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
502 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
503 * OF THE POSSIBILITY OF SUCH DAMAGE.
504 */
505
506#ifndef ECB_H
507#define ECB_H
508
509/* 16 bits major, 16 bits minor */
510#define ECB_VERSION 0x00010001
511
512#ifdef _WIN32
513 typedef signed char int8_t;
514 typedef unsigned char uint8_t;
515 typedef signed short int16_t;
516 typedef unsigned short uint16_t;
517 typedef signed int int32_t;
518 typedef unsigned int uint32_t;
98#if __GNUC__ >= 3 519 #if __GNUC__
99# define expect(expr,value) __builtin_expect ((expr),(value)) 520 typedef signed long long int64_t;
100# define inline inline 521 typedef unsigned long long uint64_t;
522 #else /* _MSC_VER || __BORLANDC__ */
523 typedef signed __int64 int64_t;
524 typedef unsigned __int64 uint64_t;
525 #endif
526 #ifdef _WIN64
527 #define ECB_PTRSIZE 8
528 typedef uint64_t uintptr_t;
529 typedef int64_t intptr_t;
530 #else
531 #define ECB_PTRSIZE 4
532 typedef uint32_t uintptr_t;
533 typedef int32_t intptr_t;
534 #endif
535 typedef intptr_t ptrdiff_t;
101#else 536#else
102# define expect(expr,value) (expr) 537 #include <inttypes.h>
103# define inline static 538 #if UINTMAX_MAX > 0xffffffffU
539 #define ECB_PTRSIZE 8
540 #else
541 #define ECB_PTRSIZE 4
104#endif 542 #endif
543#endif
105 544
106#define expect_false(expr) expect ((expr) != 0, 0) 545/* many compilers define _GNUC_ to some versions but then only implement
107#define expect_true(expr) expect ((expr) != 0, 1) 546 * what their idiot authors think are the "more important" extensions,
547 * causing enormous grief in return for some better fake benchmark numbers.
548 * or so.
549 * we try to detect these and simply assume they are not gcc - if they have
550 * an issue with that they should have done it right in the first place.
551 */
552#ifndef ECB_GCC_VERSION
553 #if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
554 #define ECB_GCC_VERSION(major,minor) 0
555 #else
556 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
557 #endif
558#endif
108 559
109#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 560#define ECB_C (__STDC__+0) /* this assumes that __STDC__ is either empty or a number */
110#define ABSPRI(w) ((w)->priority - EV_MINPRI) 561#define ECB_C99 (__STDC_VERSION__ >= 199901L)
111 562#define ECB_C11 (__STDC_VERSION__ >= 201112L)
112typedef struct ev_watcher *W; 563#define ECB_CPP (__cplusplus+0)
113typedef struct ev_watcher_list *WL; 564#define ECB_CPP11 (__cplusplus >= 201103L)
114typedef struct ev_watcher_time *WT;
115
116static ev_tstamp now_floor, now, diff; /* monotonic clock */
117ev_tstamp ev_now;
118int ev_method;
119
120static int have_monotonic; /* runtime */
121
122static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
123static void (*method_modify)(int fd, int oev, int nev);
124static void (*method_poll)(ev_tstamp timeout);
125 565
126/*****************************************************************************/ 566/*****************************************************************************/
127 567
568/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
569/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
570
571#if ECB_NO_THREADS
572 #define ECB_NO_SMP 1
573#endif
574
575#if ECB_NO_SMP
576 #define ECB_MEMORY_FENCE do { } while (0)
577#endif
578
579#ifndef ECB_MEMORY_FENCE
580 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
581 #if __i386 || __i386__
582 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
583 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
584 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
585 #elif __amd64 || __amd64__ || __x86_64 || __x86_64__
586 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
587 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
588 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
589 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
590 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
591 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
592 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
593 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
594 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
595 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
596 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
597 #elif __sparc || __sparc__
598 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
599 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
600 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
601 #elif defined __s390__ || defined __s390x__
602 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
603 #elif defined __mips__
604 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
605 #elif defined __alpha__
606 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
607 #elif defined __hppa__
608 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
609 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
610 #elif defined __ia64__
611 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
612 #endif
613 #endif
614#endif
615
616#ifndef ECB_MEMORY_FENCE
617 #if ECB_GCC_VERSION(4,7)
618 /* see comment below (stdatomic.h) about the C11 memory model. */
619 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
620 #elif defined __clang && __has_feature (cxx_atomic)
621 /* see comment below (stdatomic.h) about the C11 memory model. */
622 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
623 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
624 #define ECB_MEMORY_FENCE __sync_synchronize ()
625 #elif _MSC_VER >= 1400 /* VC++ 2005 */
626 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
627 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
628 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
629 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
630 #elif defined _WIN32
631 #include <WinNT.h>
632 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
633 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
634 #include <mbarrier.h>
635 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
636 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
637 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
638 #elif __xlC__
639 #define ECB_MEMORY_FENCE __sync ()
640 #endif
641#endif
642
643#ifndef ECB_MEMORY_FENCE
644 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
645 /* we assume that these memory fences work on all variables/all memory accesses, */
646 /* not just C11 atomics and atomic accesses */
647 #include <stdatomic.h>
648 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
649 /* any fence other than seq_cst, which isn't very efficient for us. */
650 /* Why that is, we don't know - either the C11 memory model is quite useless */
651 /* for most usages, or gcc and clang have a bug */
652 /* I *currently* lean towards the latter, and inefficiently implement */
653 /* all three of ecb's fences as a seq_cst fence */
654 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
655 #endif
656#endif
657
658#ifndef ECB_MEMORY_FENCE
659 #if !ECB_AVOID_PTHREADS
660 /*
661 * if you get undefined symbol references to pthread_mutex_lock,
662 * or failure to find pthread.h, then you should implement
663 * the ECB_MEMORY_FENCE operations for your cpu/compiler
664 * OR provide pthread.h and link against the posix thread library
665 * of your system.
666 */
667 #include <pthread.h>
668 #define ECB_NEEDS_PTHREADS 1
669 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
670
671 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
672 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
673 #endif
674#endif
675
676#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
677 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
678#endif
679
680#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
681 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
682#endif
683
684/*****************************************************************************/
685
686#if __cplusplus
687 #define ecb_inline static inline
688#elif ECB_GCC_VERSION(2,5)
689 #define ecb_inline static __inline__
690#elif ECB_C99
691 #define ecb_inline static inline
692#else
693 #define ecb_inline static
694#endif
695
696#if ECB_GCC_VERSION(3,3)
697 #define ecb_restrict __restrict__
698#elif ECB_C99
699 #define ecb_restrict restrict
700#else
701 #define ecb_restrict
702#endif
703
704typedef int ecb_bool;
705
706#define ECB_CONCAT_(a, b) a ## b
707#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
708#define ECB_STRINGIFY_(a) # a
709#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
710
711#define ecb_function_ ecb_inline
712
713#if ECB_GCC_VERSION(3,1)
714 #define ecb_attribute(attrlist) __attribute__(attrlist)
715 #define ecb_is_constant(expr) __builtin_constant_p (expr)
716 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
717 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
718#else
719 #define ecb_attribute(attrlist)
720 #define ecb_is_constant(expr) 0
721 #define ecb_expect(expr,value) (expr)
722 #define ecb_prefetch(addr,rw,locality)
723#endif
724
725/* no emulation for ecb_decltype */
726#if ECB_GCC_VERSION(4,5)
727 #define ecb_decltype(x) __decltype(x)
728#elif ECB_GCC_VERSION(3,0)
729 #define ecb_decltype(x) __typeof(x)
730#endif
731
732#define ecb_noinline ecb_attribute ((__noinline__))
733#define ecb_unused ecb_attribute ((__unused__))
734#define ecb_const ecb_attribute ((__const__))
735#define ecb_pure ecb_attribute ((__pure__))
736
737#if ECB_C11
738 #define ecb_noreturn _Noreturn
739#else
740 #define ecb_noreturn ecb_attribute ((__noreturn__))
741#endif
742
743#if ECB_GCC_VERSION(4,3)
744 #define ecb_artificial ecb_attribute ((__artificial__))
745 #define ecb_hot ecb_attribute ((__hot__))
746 #define ecb_cold ecb_attribute ((__cold__))
747#else
748 #define ecb_artificial
749 #define ecb_hot
750 #define ecb_cold
751#endif
752
753/* put around conditional expressions if you are very sure that the */
754/* expression is mostly true or mostly false. note that these return */
755/* booleans, not the expression. */
756#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
757#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
758/* for compatibility to the rest of the world */
759#define ecb_likely(expr) ecb_expect_true (expr)
760#define ecb_unlikely(expr) ecb_expect_false (expr)
761
762/* count trailing zero bits and count # of one bits */
763#if ECB_GCC_VERSION(3,4)
764 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
765 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
766 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
767 #define ecb_ctz32(x) __builtin_ctz (x)
768 #define ecb_ctz64(x) __builtin_ctzll (x)
769 #define ecb_popcount32(x) __builtin_popcount (x)
770 /* no popcountll */
771#else
772 ecb_function_ int ecb_ctz32 (uint32_t x) ecb_const;
773 ecb_function_ int
774 ecb_ctz32 (uint32_t x)
775 {
776 int r = 0;
777
778 x &= ~x + 1; /* this isolates the lowest bit */
779
780#if ECB_branchless_on_i386
781 r += !!(x & 0xaaaaaaaa) << 0;
782 r += !!(x & 0xcccccccc) << 1;
783 r += !!(x & 0xf0f0f0f0) << 2;
784 r += !!(x & 0xff00ff00) << 3;
785 r += !!(x & 0xffff0000) << 4;
786#else
787 if (x & 0xaaaaaaaa) r += 1;
788 if (x & 0xcccccccc) r += 2;
789 if (x & 0xf0f0f0f0) r += 4;
790 if (x & 0xff00ff00) r += 8;
791 if (x & 0xffff0000) r += 16;
792#endif
793
794 return r;
795 }
796
797 ecb_function_ int ecb_ctz64 (uint64_t x) ecb_const;
798 ecb_function_ int
799 ecb_ctz64 (uint64_t x)
800 {
801 int shift = x & 0xffffffffU ? 0 : 32;
802 return ecb_ctz32 (x >> shift) + shift;
803 }
804
805 ecb_function_ int ecb_popcount32 (uint32_t x) ecb_const;
806 ecb_function_ int
807 ecb_popcount32 (uint32_t x)
808 {
809 x -= (x >> 1) & 0x55555555;
810 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
811 x = ((x >> 4) + x) & 0x0f0f0f0f;
812 x *= 0x01010101;
813
814 return x >> 24;
815 }
816
817 ecb_function_ int ecb_ld32 (uint32_t x) ecb_const;
818 ecb_function_ int ecb_ld32 (uint32_t x)
819 {
820 int r = 0;
821
822 if (x >> 16) { x >>= 16; r += 16; }
823 if (x >> 8) { x >>= 8; r += 8; }
824 if (x >> 4) { x >>= 4; r += 4; }
825 if (x >> 2) { x >>= 2; r += 2; }
826 if (x >> 1) { r += 1; }
827
828 return r;
829 }
830
831 ecb_function_ int ecb_ld64 (uint64_t x) ecb_const;
832 ecb_function_ int ecb_ld64 (uint64_t x)
833 {
834 int r = 0;
835
836 if (x >> 32) { x >>= 32; r += 32; }
837
838 return r + ecb_ld32 (x);
839 }
840#endif
841
842ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) ecb_const;
843ecb_function_ ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
844ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) ecb_const;
845ecb_function_ ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
846
847ecb_function_ uint8_t ecb_bitrev8 (uint8_t x) ecb_const;
848ecb_function_ uint8_t ecb_bitrev8 (uint8_t x)
849{
850 return ( (x * 0x0802U & 0x22110U)
851 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
852}
853
854ecb_function_ uint16_t ecb_bitrev16 (uint16_t x) ecb_const;
855ecb_function_ uint16_t ecb_bitrev16 (uint16_t x)
856{
857 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
858 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
859 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
860 x = ( x >> 8 ) | ( x << 8);
861
862 return x;
863}
864
865ecb_function_ uint32_t ecb_bitrev32 (uint32_t x) ecb_const;
866ecb_function_ uint32_t ecb_bitrev32 (uint32_t x)
867{
868 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
869 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
870 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
871 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
872 x = ( x >> 16 ) | ( x << 16);
873
874 return x;
875}
876
877/* popcount64 is only available on 64 bit cpus as gcc builtin */
878/* so for this version we are lazy */
879ecb_function_ int ecb_popcount64 (uint64_t x) ecb_const;
880ecb_function_ int
881ecb_popcount64 (uint64_t x)
882{
883 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
884}
885
886ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) ecb_const;
887ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) ecb_const;
888ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) ecb_const;
889ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) ecb_const;
890ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) ecb_const;
891ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) ecb_const;
892ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) ecb_const;
893ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) ecb_const;
894
895ecb_inline uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
896ecb_inline uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
897ecb_inline uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
898ecb_inline uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
899ecb_inline uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
900ecb_inline uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
901ecb_inline uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
902ecb_inline uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
903
904#if ECB_GCC_VERSION(4,3)
905 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
906 #define ecb_bswap32(x) __builtin_bswap32 (x)
907 #define ecb_bswap64(x) __builtin_bswap64 (x)
908#else
909 ecb_function_ uint16_t ecb_bswap16 (uint16_t x) ecb_const;
910 ecb_function_ uint16_t
911 ecb_bswap16 (uint16_t x)
912 {
913 return ecb_rotl16 (x, 8);
914 }
915
916 ecb_function_ uint32_t ecb_bswap32 (uint32_t x) ecb_const;
917 ecb_function_ uint32_t
918 ecb_bswap32 (uint32_t x)
919 {
920 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
921 }
922
923 ecb_function_ uint64_t ecb_bswap64 (uint64_t x) ecb_const;
924 ecb_function_ uint64_t
925 ecb_bswap64 (uint64_t x)
926 {
927 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
928 }
929#endif
930
931#if ECB_GCC_VERSION(4,5)
932 #define ecb_unreachable() __builtin_unreachable ()
933#else
934 /* this seems to work fine, but gcc always emits a warning for it :/ */
935 ecb_inline void ecb_unreachable (void) ecb_noreturn;
936 ecb_inline void ecb_unreachable (void) { }
937#endif
938
939/* try to tell the compiler that some condition is definitely true */
940#define ecb_assume(cond) do { if (!(cond)) ecb_unreachable (); } while (0)
941
942ecb_inline unsigned char ecb_byteorder_helper (void) ecb_const;
943ecb_inline unsigned char
944ecb_byteorder_helper (void)
945{
946 const uint32_t u = 0x11223344;
947 return *(unsigned char *)&u;
948}
949
950ecb_inline ecb_bool ecb_big_endian (void) ecb_const;
951ecb_inline ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
952ecb_inline ecb_bool ecb_little_endian (void) ecb_const;
953ecb_inline ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
954
955#if ECB_GCC_VERSION(3,0) || ECB_C99
956 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
957#else
958 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
959#endif
960
961#if __cplusplus
962 template<typename T>
963 static inline T ecb_div_rd (T val, T div)
964 {
965 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
966 }
967 template<typename T>
968 static inline T ecb_div_ru (T val, T div)
969 {
970 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
971 }
972#else
973 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
974 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
975#endif
976
977#if ecb_cplusplus_does_not_suck
978 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
979 template<typename T, int N>
980 static inline int ecb_array_length (const T (&arr)[N])
981 {
982 return N;
983 }
984#else
985 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
986#endif
987
988#endif
989
990/* ECB.H END */
991
992#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
993/* if your architecture doesn't need memory fences, e.g. because it is
994 * single-cpu/core, or if you use libev in a project that doesn't use libev
995 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
996 * libev, in which cases the memory fences become nops.
997 * alternatively, you can remove this #error and link against libpthread,
998 * which will then provide the memory fences.
999 */
1000# error "memory fences not defined for your architecture, please report"
1001#endif
1002
1003#ifndef ECB_MEMORY_FENCE
1004# define ECB_MEMORY_FENCE do { } while (0)
1005# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1006# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1007#endif
1008
1009#define expect_false(cond) ecb_expect_false (cond)
1010#define expect_true(cond) ecb_expect_true (cond)
1011#define noinline ecb_noinline
1012
1013#define inline_size ecb_inline
1014
1015#if EV_FEATURE_CODE
1016# define inline_speed ecb_inline
1017#else
1018# define inline_speed static noinline
1019#endif
1020
1021#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1022
1023#if EV_MINPRI == EV_MAXPRI
1024# define ABSPRI(w) (((W)w), 0)
1025#else
1026# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1027#endif
1028
1029#define EMPTY /* required for microsofts broken pseudo-c compiler */
1030#define EMPTY2(a,b) /* used to suppress some warnings */
1031
1032typedef ev_watcher *W;
1033typedef ev_watcher_list *WL;
1034typedef ev_watcher_time *WT;
1035
1036#define ev_active(w) ((W)(w))->active
1037#define ev_at(w) ((WT)(w))->at
1038
1039#if EV_USE_REALTIME
1040/* sig_atomic_t is used to avoid per-thread variables or locking but still */
1041/* giving it a reasonably high chance of working on typical architectures */
1042static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1043#endif
1044
1045#if EV_USE_MONOTONIC
1046static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1047#endif
1048
1049#ifndef EV_FD_TO_WIN32_HANDLE
1050# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1051#endif
1052#ifndef EV_WIN32_HANDLE_TO_FD
1053# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1054#endif
1055#ifndef EV_WIN32_CLOSE_FD
1056# define EV_WIN32_CLOSE_FD(fd) close (fd)
1057#endif
1058
1059#ifdef _WIN32
1060# include "ev_win32.c"
1061#endif
1062
1063/*****************************************************************************/
1064
1065/* define a suitable floor function (only used by periodics atm) */
1066
1067#if EV_USE_FLOOR
1068# include <math.h>
1069# define ev_floor(v) floor (v)
1070#else
1071
1072#include <float.h>
1073
1074/* a floor() replacement function, should be independent of ev_tstamp type */
1075static ev_tstamp noinline
1076ev_floor (ev_tstamp v)
1077{
1078 /* the choice of shift factor is not terribly important */
1079#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1080 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1081#else
1082 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1083#endif
1084
1085 /* argument too large for an unsigned long? */
1086 if (expect_false (v >= shift))
1087 {
1088 ev_tstamp f;
1089
1090 if (v == v - 1.)
1091 return v; /* very large number */
1092
1093 f = shift * ev_floor (v * (1. / shift));
1094 return f + ev_floor (v - f);
1095 }
1096
1097 /* special treatment for negative args? */
1098 if (expect_false (v < 0.))
1099 {
1100 ev_tstamp f = -ev_floor (-v);
1101
1102 return f - (f == v ? 0 : 1);
1103 }
1104
1105 /* fits into an unsigned long */
1106 return (unsigned long)v;
1107}
1108
1109#endif
1110
1111/*****************************************************************************/
1112
1113#ifdef __linux
1114# include <sys/utsname.h>
1115#endif
1116
1117static unsigned int noinline ecb_cold
1118ev_linux_version (void)
1119{
1120#ifdef __linux
1121 unsigned int v = 0;
1122 struct utsname buf;
1123 int i;
1124 char *p = buf.release;
1125
1126 if (uname (&buf))
1127 return 0;
1128
1129 for (i = 3+1; --i; )
1130 {
1131 unsigned int c = 0;
1132
1133 for (;;)
1134 {
1135 if (*p >= '0' && *p <= '9')
1136 c = c * 10 + *p++ - '0';
1137 else
1138 {
1139 p += *p == '.';
1140 break;
1141 }
1142 }
1143
1144 v = (v << 8) | c;
1145 }
1146
1147 return v;
1148#else
1149 return 0;
1150#endif
1151}
1152
1153/*****************************************************************************/
1154
1155#if EV_AVOID_STDIO
1156static void noinline ecb_cold
1157ev_printerr (const char *msg)
1158{
1159 write (STDERR_FILENO, msg, strlen (msg));
1160}
1161#endif
1162
1163static void (*syserr_cb)(const char *msg) EV_THROW;
1164
1165void ecb_cold
1166ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
1167{
1168 syserr_cb = cb;
1169}
1170
1171static void noinline ecb_cold
1172ev_syserr (const char *msg)
1173{
1174 if (!msg)
1175 msg = "(libev) system error";
1176
1177 if (syserr_cb)
1178 syserr_cb (msg);
1179 else
1180 {
1181#if EV_AVOID_STDIO
1182 ev_printerr (msg);
1183 ev_printerr (": ");
1184 ev_printerr (strerror (errno));
1185 ev_printerr ("\n");
1186#else
1187 perror (msg);
1188#endif
1189 abort ();
1190 }
1191}
1192
1193static void *
1194ev_realloc_emul (void *ptr, long size) EV_THROW
1195{
1196 /* some systems, notably openbsd and darwin, fail to properly
1197 * implement realloc (x, 0) (as required by both ansi c-89 and
1198 * the single unix specification, so work around them here.
1199 * recently, also (at least) fedora and debian started breaking it,
1200 * despite documenting it otherwise.
1201 */
1202
1203 if (size)
1204 return realloc (ptr, size);
1205
1206 free (ptr);
1207 return 0;
1208}
1209
1210static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
1211
1212void ecb_cold
1213ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
1214{
1215 alloc = cb;
1216}
1217
1218inline_speed void *
1219ev_realloc (void *ptr, long size)
1220{
1221 ptr = alloc (ptr, size);
1222
1223 if (!ptr && size)
1224 {
1225#if EV_AVOID_STDIO
1226 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1227#else
1228 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1229#endif
1230 abort ();
1231 }
1232
1233 return ptr;
1234}
1235
1236#define ev_malloc(size) ev_realloc (0, (size))
1237#define ev_free(ptr) ev_realloc ((ptr), 0)
1238
1239/*****************************************************************************/
1240
1241/* set in reify when reification needed */
1242#define EV_ANFD_REIFY 1
1243
1244/* file descriptor info structure */
1245typedef struct
1246{
1247 WL head;
1248 unsigned char events; /* the events watched for */
1249 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1250 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
1251 unsigned char unused;
1252#if EV_USE_EPOLL
1253 unsigned int egen; /* generation counter to counter epoll bugs */
1254#endif
1255#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1256 SOCKET handle;
1257#endif
1258#if EV_USE_IOCP
1259 OVERLAPPED or, ow;
1260#endif
1261} ANFD;
1262
1263/* stores the pending event set for a given watcher */
1264typedef struct
1265{
1266 W w;
1267 int events; /* the pending event set for the given watcher */
1268} ANPENDING;
1269
1270#if EV_USE_INOTIFY
1271/* hash table entry per inotify-id */
1272typedef struct
1273{
1274 WL head;
1275} ANFS;
1276#endif
1277
1278/* Heap Entry */
1279#if EV_HEAP_CACHE_AT
1280 /* a heap element */
1281 typedef struct {
1282 ev_tstamp at;
1283 WT w;
1284 } ANHE;
1285
1286 #define ANHE_w(he) (he).w /* access watcher, read-write */
1287 #define ANHE_at(he) (he).at /* access cached at, read-only */
1288 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1289#else
1290 /* a heap element */
1291 typedef WT ANHE;
1292
1293 #define ANHE_w(he) (he)
1294 #define ANHE_at(he) (he)->at
1295 #define ANHE_at_cache(he)
1296#endif
1297
1298#if EV_MULTIPLICITY
1299
1300 struct ev_loop
1301 {
1302 ev_tstamp ev_rt_now;
1303 #define ev_rt_now ((loop)->ev_rt_now)
1304 #define VAR(name,decl) decl;
1305 #include "ev_vars.h"
1306 #undef VAR
1307 };
1308 #include "ev_wrap.h"
1309
1310 static struct ev_loop default_loop_struct;
1311 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
1312
1313#else
1314
1315 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
1316 #define VAR(name,decl) static decl;
1317 #include "ev_vars.h"
1318 #undef VAR
1319
1320 static int ev_default_loop_ptr;
1321
1322#endif
1323
1324#if EV_FEATURE_API
1325# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1326# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1327# define EV_INVOKE_PENDING invoke_cb (EV_A)
1328#else
1329# define EV_RELEASE_CB (void)0
1330# define EV_ACQUIRE_CB (void)0
1331# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1332#endif
1333
1334#define EVBREAK_RECURSE 0x80
1335
1336/*****************************************************************************/
1337
1338#ifndef EV_HAVE_EV_TIME
128ev_tstamp 1339ev_tstamp
129ev_time (void) 1340ev_time (void) EV_THROW
130{ 1341{
131#if EV_USE_REALTIME 1342#if EV_USE_REALTIME
1343 if (expect_true (have_realtime))
1344 {
132 struct timespec ts; 1345 struct timespec ts;
133 clock_gettime (CLOCK_REALTIME, &ts); 1346 clock_gettime (CLOCK_REALTIME, &ts);
134 return ts.tv_sec + ts.tv_nsec * 1e-9; 1347 return ts.tv_sec + ts.tv_nsec * 1e-9;
135#else 1348 }
1349#endif
1350
136 struct timeval tv; 1351 struct timeval tv;
137 gettimeofday (&tv, 0); 1352 gettimeofday (&tv, 0);
138 return tv.tv_sec + tv.tv_usec * 1e-6; 1353 return tv.tv_sec + tv.tv_usec * 1e-6;
139#endif
140} 1354}
1355#endif
141 1356
142static ev_tstamp 1357inline_size ev_tstamp
143get_clock (void) 1358get_clock (void)
144{ 1359{
145#if EV_USE_MONOTONIC 1360#if EV_USE_MONOTONIC
146 if (expect_true (have_monotonic)) 1361 if (expect_true (have_monotonic))
147 { 1362 {
… …
152#endif 1367#endif
153 1368
154 return ev_time (); 1369 return ev_time ();
155} 1370}
156 1371
157#define array_roundsize(base,n) ((n) | 4 & ~3) 1372#if EV_MULTIPLICITY
1373ev_tstamp
1374ev_now (EV_P) EV_THROW
1375{
1376 return ev_rt_now;
1377}
1378#endif
158 1379
159#define array_needsize(base,cur,cnt,init) \ 1380void
160 if (expect_false ((cnt) > cur)) \ 1381ev_sleep (ev_tstamp delay) EV_THROW
161 { \ 1382{
162 int newcnt = cur; \ 1383 if (delay > 0.)
163 do \
164 { \
165 newcnt = array_roundsize (base, newcnt << 1); \
166 } \
167 while ((cnt) > newcnt); \
168 \
169 base = realloc (base, sizeof (*base) * (newcnt)); \
170 init (base + cur, newcnt - cur); \
171 cur = newcnt; \
172 } 1384 {
1385#if EV_USE_NANOSLEEP
1386 struct timespec ts;
1387
1388 EV_TS_SET (ts, delay);
1389 nanosleep (&ts, 0);
1390#elif defined _WIN32
1391 Sleep ((unsigned long)(delay * 1e3));
1392#else
1393 struct timeval tv;
1394
1395 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
1396 /* something not guaranteed by newer posix versions, but guaranteed */
1397 /* by older ones */
1398 EV_TV_SET (tv, delay);
1399 select (0, 0, 0, 0, &tv);
1400#endif
1401 }
1402}
173 1403
174/*****************************************************************************/ 1404/*****************************************************************************/
175 1405
176typedef struct 1406#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
177{
178 struct ev_io *head;
179 unsigned char events;
180 unsigned char reify;
181} ANFD;
182 1407
183static ANFD *anfds; 1408/* find a suitable new size for the given array, */
184static int anfdmax; 1409/* hopefully by rounding to a nice-to-malloc size */
185 1410inline_size int
186static void 1411array_nextsize (int elem, int cur, int cnt)
187anfds_init (ANFD *base, int count)
188{ 1412{
189 while (count--) 1413 int ncur = cur + 1;
190 {
191 base->head = 0;
192 base->events = EV_NONE;
193 base->reify = 0;
194 1414
195 ++base; 1415 do
1416 ncur <<= 1;
1417 while (cnt > ncur);
1418
1419 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
1420 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
196 } 1421 {
197} 1422 ncur *= elem;
198 1423 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
199typedef struct 1424 ncur = ncur - sizeof (void *) * 4;
200{ 1425 ncur /= elem;
201 W w;
202 int events;
203} ANPENDING;
204
205static ANPENDING *pendings [NUMPRI];
206static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
207
208static void
209event (W w, int events)
210{
211 if (w->pending)
212 { 1426 }
1427
1428 return ncur;
1429}
1430
1431static void * noinline ecb_cold
1432array_realloc (int elem, void *base, int *cur, int cnt)
1433{
1434 *cur = array_nextsize (elem, *cur, cnt);
1435 return ev_realloc (base, elem * *cur);
1436}
1437
1438#define array_init_zero(base,count) \
1439 memset ((void *)(base), 0, sizeof (*(base)) * (count))
1440
1441#define array_needsize(type,base,cur,cnt,init) \
1442 if (expect_false ((cnt) > (cur))) \
1443 { \
1444 int ecb_unused ocur_ = (cur); \
1445 (base) = (type *)array_realloc \
1446 (sizeof (type), (base), &(cur), (cnt)); \
1447 init ((base) + (ocur_), (cur) - ocur_); \
1448 }
1449
1450#if 0
1451#define array_slim(type,stem) \
1452 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
1453 { \
1454 stem ## max = array_roundsize (stem ## cnt >> 1); \
1455 base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
1456 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
1457 }
1458#endif
1459
1460#define array_free(stem, idx) \
1461 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
1462
1463/*****************************************************************************/
1464
1465/* dummy callback for pending events */
1466static void noinline
1467pendingcb (EV_P_ ev_prepare *w, int revents)
1468{
1469}
1470
1471void noinline
1472ev_feed_event (EV_P_ void *w, int revents) EV_THROW
1473{
1474 W w_ = (W)w;
1475 int pri = ABSPRI (w_);
1476
1477 if (expect_false (w_->pending))
1478 pendings [pri][w_->pending - 1].events |= revents;
1479 else
1480 {
1481 w_->pending = ++pendingcnt [pri];
1482 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
1483 pendings [pri][w_->pending - 1].w = w_;
213 pendings [ABSPRI (w)][w->pending - 1].events |= events; 1484 pendings [pri][w_->pending - 1].events = revents;
214 return;
215 } 1485 }
216 1486
217 w->pending = ++pendingcnt [ABSPRI (w)]; 1487 pendingpri = NUMPRI - 1;
218 array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
219 pendings [ABSPRI (w)][w->pending - 1].w = w;
220 pendings [ABSPRI (w)][w->pending - 1].events = events;
221} 1488}
222 1489
223static void 1490inline_speed void
1491feed_reverse (EV_P_ W w)
1492{
1493 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1494 rfeeds [rfeedcnt++] = w;
1495}
1496
1497inline_size void
1498feed_reverse_done (EV_P_ int revents)
1499{
1500 do
1501 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1502 while (rfeedcnt);
1503}
1504
1505inline_speed void
224queue_events (W *events, int eventcnt, int type) 1506queue_events (EV_P_ W *events, int eventcnt, int type)
225{ 1507{
226 int i; 1508 int i;
227 1509
228 for (i = 0; i < eventcnt; ++i) 1510 for (i = 0; i < eventcnt; ++i)
229 event (events [i], type); 1511 ev_feed_event (EV_A_ events [i], type);
230} 1512}
231 1513
232static void 1514/*****************************************************************************/
1515
1516inline_speed void
233fd_event (int fd, int events) 1517fd_event_nocheck (EV_P_ int fd, int revents)
234{ 1518{
235 ANFD *anfd = anfds + fd; 1519 ANFD *anfd = anfds + fd;
236 struct ev_io *w; 1520 ev_io *w;
237 1521
238 for (w = anfd->head; w; w = w->next) 1522 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
239 { 1523 {
240 int ev = w->events & events; 1524 int ev = w->events & revents;
241 1525
242 if (ev) 1526 if (ev)
243 event ((W)w, ev); 1527 ev_feed_event (EV_A_ (W)w, ev);
244 } 1528 }
245} 1529}
246 1530
247/*****************************************************************************/ 1531/* do not submit kernel events for fds that have reify set */
1532/* because that means they changed while we were polling for new events */
1533inline_speed void
1534fd_event (EV_P_ int fd, int revents)
1535{
1536 ANFD *anfd = anfds + fd;
248 1537
249static int *fdchanges; 1538 if (expect_true (!anfd->reify))
250static int fdchangemax, fdchangecnt; 1539 fd_event_nocheck (EV_A_ fd, revents);
1540}
251 1541
252static void 1542void
253fd_reify (void) 1543ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
1544{
1545 if (fd >= 0 && fd < anfdmax)
1546 fd_event_nocheck (EV_A_ fd, revents);
1547}
1548
1549/* make sure the external fd watch events are in-sync */
1550/* with the kernel/libev internal state */
1551inline_size void
1552fd_reify (EV_P)
254{ 1553{
255 int i; 1554 int i;
256 1555
1556#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
257 for (i = 0; i < fdchangecnt; ++i) 1557 for (i = 0; i < fdchangecnt; ++i)
258 { 1558 {
259 int fd = fdchanges [i]; 1559 int fd = fdchanges [i];
260 ANFD *anfd = anfds + fd; 1560 ANFD *anfd = anfds + fd;
261 struct ev_io *w;
262 1561
263 int events = 0; 1562 if (anfd->reify & EV__IOFDSET && anfd->head)
264
265 for (w = anfd->head; w; w = w->next)
266 events |= w->events;
267
268 anfd->reify = 0;
269
270 if (anfd->events != events)
271 { 1563 {
1564 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1565
1566 if (handle != anfd->handle)
1567 {
1568 unsigned long arg;
1569
1570 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1571
1572 /* handle changed, but fd didn't - we need to do it in two steps */
272 method_modify (fd, anfd->events, events); 1573 backend_modify (EV_A_ fd, anfd->events, 0);
273 anfd->events = events; 1574 anfd->events = 0;
1575 anfd->handle = handle;
1576 }
274 } 1577 }
275 } 1578 }
1579#endif
1580
1581 for (i = 0; i < fdchangecnt; ++i)
1582 {
1583 int fd = fdchanges [i];
1584 ANFD *anfd = anfds + fd;
1585 ev_io *w;
1586
1587 unsigned char o_events = anfd->events;
1588 unsigned char o_reify = anfd->reify;
1589
1590 anfd->reify = 0;
1591
1592 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
1593 {
1594 anfd->events = 0;
1595
1596 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
1597 anfd->events |= (unsigned char)w->events;
1598
1599 if (o_events != anfd->events)
1600 o_reify = EV__IOFDSET; /* actually |= */
1601 }
1602
1603 if (o_reify & EV__IOFDSET)
1604 backend_modify (EV_A_ fd, o_events, anfd->events);
1605 }
276 1606
277 fdchangecnt = 0; 1607 fdchangecnt = 0;
278} 1608}
279 1609
280static void 1610/* something about the given fd changed */
281fd_change (int fd) 1611inline_size void
1612fd_change (EV_P_ int fd, int flags)
282{ 1613{
283 if (anfds [fd].reify || fdchangecnt < 0) 1614 unsigned char reify = anfds [fd].reify;
284 return;
285
286 anfds [fd].reify = 1; 1615 anfds [fd].reify |= flags;
287 1616
1617 if (expect_true (!reify))
1618 {
288 ++fdchangecnt; 1619 ++fdchangecnt;
289 array_needsize (fdchanges, fdchangemax, fdchangecnt, ); 1620 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
290 fdchanges [fdchangecnt - 1] = fd; 1621 fdchanges [fdchangecnt - 1] = fd;
1622 }
291} 1623}
292 1624
293static void 1625/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1626inline_speed void ecb_cold
294fd_kill (int fd) 1627fd_kill (EV_P_ int fd)
295{ 1628{
296 struct ev_io *w; 1629 ev_io *w;
297 1630
298 printf ("killing fd %d\n", fd);//D
299 while ((w = anfds [fd].head)) 1631 while ((w = (ev_io *)anfds [fd].head))
300 { 1632 {
301 ev_io_stop (w); 1633 ev_io_stop (EV_A_ w);
302 event ((W)w, EV_ERROR | EV_READ | EV_WRITE); 1634 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
303 } 1635 }
1636}
1637
1638/* check whether the given fd is actually valid, for error recovery */
1639inline_size int ecb_cold
1640fd_valid (int fd)
1641{
1642#ifdef _WIN32
1643 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1644#else
1645 return fcntl (fd, F_GETFD) != -1;
1646#endif
304} 1647}
305 1648
306/* called on EBADF to verify fds */ 1649/* called on EBADF to verify fds */
307static void 1650static void noinline ecb_cold
308fd_ebadf (void) 1651fd_ebadf (EV_P)
309{ 1652{
310 int fd; 1653 int fd;
311 1654
312 for (fd = 0; fd < anfdmax; ++fd) 1655 for (fd = 0; fd < anfdmax; ++fd)
313 if (anfds [fd].events) 1656 if (anfds [fd].events)
314 if (fcntl (fd, F_GETFD) == -1 && errno == EBADF) 1657 if (!fd_valid (fd) && errno == EBADF)
315 fd_kill (fd); 1658 fd_kill (EV_A_ fd);
316} 1659}
317 1660
318/* called on ENOMEM in select/poll to kill some fds and retry */ 1661/* called on ENOMEM in select/poll to kill some fds and retry */
319static void 1662static void noinline ecb_cold
320fd_enomem (void) 1663fd_enomem (EV_P)
321{ 1664{
322 int fd = anfdmax; 1665 int fd;
323 1666
324 while (fd--) 1667 for (fd = anfdmax; fd--; )
325 if (anfds [fd].events) 1668 if (anfds [fd].events)
326 { 1669 {
327 close (fd);
328 fd_kill (fd); 1670 fd_kill (EV_A_ fd);
329 return; 1671 break;
330 } 1672 }
331} 1673}
332 1674
1675/* usually called after fork if backend needs to re-arm all fds from scratch */
1676static void noinline
1677fd_rearm_all (EV_P)
1678{
1679 int fd;
1680
1681 for (fd = 0; fd < anfdmax; ++fd)
1682 if (anfds [fd].events)
1683 {
1684 anfds [fd].events = 0;
1685 anfds [fd].emask = 0;
1686 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
1687 }
1688}
1689
1690/* used to prepare libev internal fd's */
1691/* this is not fork-safe */
1692inline_speed void
1693fd_intern (int fd)
1694{
1695#ifdef _WIN32
1696 unsigned long arg = 1;
1697 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
1698#else
1699 fcntl (fd, F_SETFD, FD_CLOEXEC);
1700 fcntl (fd, F_SETFL, O_NONBLOCK);
1701#endif
1702}
1703
333/*****************************************************************************/ 1704/*****************************************************************************/
334 1705
335static struct ev_timer **timers; 1706/*
336static int timermax, timercnt; 1707 * the heap functions want a real array index. array index 0 is guaranteed to not
1708 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
1709 * the branching factor of the d-tree.
1710 */
337 1711
338static struct ev_periodic **periodics; 1712/*
339static int periodicmax, periodiccnt; 1713 * at the moment we allow libev the luxury of two heaps,
1714 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
1715 * which is more cache-efficient.
1716 * the difference is about 5% with 50000+ watchers.
1717 */
1718#if EV_USE_4HEAP
340 1719
1720#define DHEAP 4
1721#define HEAP0 (DHEAP - 1) /* index of first element in heap */
1722#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
1723#define UPHEAP_DONE(p,k) ((p) == (k))
1724
1725/* away from the root */
1726inline_speed void
1727downheap (ANHE *heap, int N, int k)
1728{
1729 ANHE he = heap [k];
1730 ANHE *E = heap + N + HEAP0;
1731
1732 for (;;)
1733 {
1734 ev_tstamp minat;
1735 ANHE *minpos;
1736 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
1737
1738 /* find minimum child */
1739 if (expect_true (pos + DHEAP - 1 < E))
1740 {
1741 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1742 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1743 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1744 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1745 }
1746 else if (pos < E)
1747 {
1748 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
1749 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
1750 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
1751 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
1752 }
1753 else
1754 break;
1755
1756 if (ANHE_at (he) <= minat)
1757 break;
1758
1759 heap [k] = *minpos;
1760 ev_active (ANHE_w (*minpos)) = k;
1761
1762 k = minpos - heap;
1763 }
1764
1765 heap [k] = he;
1766 ev_active (ANHE_w (he)) = k;
1767}
1768
1769#else /* 4HEAP */
1770
1771#define HEAP0 1
1772#define HPARENT(k) ((k) >> 1)
1773#define UPHEAP_DONE(p,k) (!(p))
1774
1775/* away from the root */
1776inline_speed void
1777downheap (ANHE *heap, int N, int k)
1778{
1779 ANHE he = heap [k];
1780
1781 for (;;)
1782 {
1783 int c = k << 1;
1784
1785 if (c >= N + HEAP0)
1786 break;
1787
1788 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
1789 ? 1 : 0;
1790
1791 if (ANHE_at (he) <= ANHE_at (heap [c]))
1792 break;
1793
1794 heap [k] = heap [c];
1795 ev_active (ANHE_w (heap [k])) = k;
1796
1797 k = c;
1798 }
1799
1800 heap [k] = he;
1801 ev_active (ANHE_w (he)) = k;
1802}
1803#endif
1804
1805/* towards the root */
1806inline_speed void
1807upheap (ANHE *heap, int k)
1808{
1809 ANHE he = heap [k];
1810
1811 for (;;)
1812 {
1813 int p = HPARENT (k);
1814
1815 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
1816 break;
1817
1818 heap [k] = heap [p];
1819 ev_active (ANHE_w (heap [k])) = k;
1820 k = p;
1821 }
1822
1823 heap [k] = he;
1824 ev_active (ANHE_w (he)) = k;
1825}
1826
1827/* move an element suitably so it is in a correct place */
1828inline_size void
1829adjustheap (ANHE *heap, int N, int k)
1830{
1831 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
1832 upheap (heap, k);
1833 else
1834 downheap (heap, N, k);
1835}
1836
1837/* rebuild the heap: this function is used only once and executed rarely */
1838inline_size void
1839reheap (ANHE *heap, int N)
1840{
1841 int i;
1842
1843 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
1844 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
1845 for (i = 0; i < N; ++i)
1846 upheap (heap, i + HEAP0);
1847}
1848
1849/*****************************************************************************/
1850
1851/* associate signal watchers to a signal signal */
1852typedef struct
1853{
1854 EV_ATOMIC_T pending;
1855#if EV_MULTIPLICITY
1856 EV_P;
1857#endif
1858 WL head;
1859} ANSIG;
1860
1861static ANSIG signals [EV_NSIG - 1];
1862
1863/*****************************************************************************/
1864
1865#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1866
1867static void noinline ecb_cold
1868evpipe_init (EV_P)
1869{
1870 if (!ev_is_active (&pipe_w))
1871 {
1872 int fds [2];
1873
1874# if EV_USE_EVENTFD
1875 fds [0] = -1;
1876 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1877 if (fds [1] < 0 && errno == EINVAL)
1878 fds [1] = eventfd (0, 0);
1879
1880 if (fds [1] < 0)
1881# endif
1882 {
1883 while (pipe (fds))
1884 ev_syserr ("(libev) error creating signal/async pipe");
1885
1886 fd_intern (fds [0]);
1887 }
1888
1889 fd_intern (fds [1]);
1890
1891 evpipe [0] = fds [0];
1892
1893 if (evpipe [1] < 0)
1894 evpipe [1] = fds [1]; /* first call, set write fd */
1895 else
1896 {
1897 /* on subsequent calls, do not change evpipe [1] */
1898 /* so that evpipe_write can always rely on its value. */
1899 /* this branch does not do anything sensible on windows, */
1900 /* so must not be executed on windows */
1901
1902 dup2 (fds [1], evpipe [1]);
1903 close (fds [1]);
1904 }
1905
1906 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
1907 ev_io_start (EV_A_ &pipe_w);
1908 ev_unref (EV_A); /* watcher should not keep loop alive */
1909 }
1910}
1911
1912inline_speed void
1913evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1914{
1915 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
1916
1917 if (expect_true (*flag))
1918 return;
1919
1920 *flag = 1;
1921 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
1922
1923 pipe_write_skipped = 1;
1924
1925 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
1926
1927 if (pipe_write_wanted)
1928 {
1929 int old_errno;
1930
1931 pipe_write_skipped = 0;
1932 ECB_MEMORY_FENCE_RELEASE;
1933
1934 old_errno = errno; /* save errno because write will clobber it */
1935
1936#if EV_USE_EVENTFD
1937 if (evpipe [0] < 0)
1938 {
1939 uint64_t counter = 1;
1940 write (evpipe [1], &counter, sizeof (uint64_t));
1941 }
1942 else
1943#endif
1944 {
1945#ifdef _WIN32
1946 WSABUF buf;
1947 DWORD sent;
1948 buf.buf = &buf;
1949 buf.len = 1;
1950 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
1951#else
1952 write (evpipe [1], &(evpipe [1]), 1);
1953#endif
1954 }
1955
1956 errno = old_errno;
1957 }
1958}
1959
1960/* called whenever the libev signal pipe */
1961/* got some events (signal, async) */
341static void 1962static void
342upheap (WT *timers, int k) 1963pipecb (EV_P_ ev_io *iow, int revents)
343{ 1964{
344 WT w = timers [k]; 1965 int i;
345 1966
346 while (k && timers [k >> 1]->at > w->at) 1967 if (revents & EV_READ)
347 {
348 timers [k] = timers [k >> 1];
349 timers [k]->active = k + 1;
350 k >>= 1;
351 } 1968 {
1969#if EV_USE_EVENTFD
1970 if (evpipe [0] < 0)
1971 {
1972 uint64_t counter;
1973 read (evpipe [1], &counter, sizeof (uint64_t));
1974 }
1975 else
1976#endif
1977 {
1978 char dummy[4];
1979#ifdef _WIN32
1980 WSABUF buf;
1981 DWORD recvd;
1982 DWORD flags = 0;
1983 buf.buf = dummy;
1984 buf.len = sizeof (dummy);
1985 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
1986#else
1987 read (evpipe [0], &dummy, sizeof (dummy));
1988#endif
1989 }
1990 }
352 1991
353 timers [k] = w; 1992 pipe_write_skipped = 0;
354 timers [k]->active = k + 1;
355 1993
1994 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
1995
1996#if EV_SIGNAL_ENABLE
1997 if (sig_pending)
1998 {
1999 sig_pending = 0;
2000
2001 ECB_MEMORY_FENCE;
2002
2003 for (i = EV_NSIG - 1; i--; )
2004 if (expect_false (signals [i].pending))
2005 ev_feed_signal_event (EV_A_ i + 1);
2006 }
2007#endif
2008
2009#if EV_ASYNC_ENABLE
2010 if (async_pending)
2011 {
2012 async_pending = 0;
2013
2014 ECB_MEMORY_FENCE;
2015
2016 for (i = asynccnt; i--; )
2017 if (asyncs [i]->sent)
2018 {
2019 asyncs [i]->sent = 0;
2020 ECB_MEMORY_FENCE_RELEASE;
2021 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
2022 }
2023 }
2024#endif
2025}
2026
2027/*****************************************************************************/
2028
2029void
2030ev_feed_signal (int signum) EV_THROW
2031{
2032#if EV_MULTIPLICITY
2033 EV_P = signals [signum - 1].loop;
2034
2035 if (!EV_A)
2036 return;
2037#endif
2038
2039 signals [signum - 1].pending = 1;
2040 evpipe_write (EV_A_ &sig_pending);
356} 2041}
357 2042
358static void 2043static void
359downheap (WT *timers, int N, int k) 2044ev_sighandler (int signum)
360{ 2045{
361 WT w = timers [k]; 2046#ifdef _WIN32
2047 signal (signum, ev_sighandler);
2048#endif
362 2049
363 while (k < (N >> 1)) 2050 ev_feed_signal (signum);
364 { 2051}
365 int j = k << 1;
366 2052
367 if (j + 1 < N && timers [j]->at > timers [j + 1]->at) 2053void noinline
368 ++j; 2054ev_feed_signal_event (EV_P_ int signum) EV_THROW
2055{
2056 WL w;
369 2057
370 if (w->at <= timers [j]->at) 2058 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2059 return;
2060
2061 --signum;
2062
2063#if EV_MULTIPLICITY
2064 /* it is permissible to try to feed a signal to the wrong loop */
2065 /* or, likely more useful, feeding a signal nobody is waiting for */
2066
2067 if (expect_false (signals [signum].loop != EV_A))
2068 return;
2069#endif
2070
2071 signals [signum].pending = 0;
2072 ECB_MEMORY_FENCE_RELEASE;
2073
2074 for (w = signals [signum].head; w; w = w->next)
2075 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2076}
2077
2078#if EV_USE_SIGNALFD
2079static void
2080sigfdcb (EV_P_ ev_io *iow, int revents)
2081{
2082 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2083
2084 for (;;)
2085 {
2086 ssize_t res = read (sigfd, si, sizeof (si));
2087
2088 /* not ISO-C, as res might be -1, but works with SuS */
2089 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2090 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2091
2092 if (res < (ssize_t)sizeof (si))
371 break; 2093 break;
372
373 timers [k] = timers [j];
374 timers [k]->active = k + 1;
375 k = j;
376 } 2094 }
377
378 timers [k] = w;
379 timers [k]->active = k + 1;
380} 2095}
2096#endif
2097
2098#endif
381 2099
382/*****************************************************************************/ 2100/*****************************************************************************/
383 2101
384typedef struct 2102#if EV_CHILD_ENABLE
385{ 2103static WL childs [EV_PID_HASHSIZE];
386 struct ev_signal *head;
387 sig_atomic_t volatile gotsig;
388} ANSIG;
389 2104
390static ANSIG *signals;
391static int signalmax;
392
393static int sigpipe [2];
394static sig_atomic_t volatile gotsig;
395static struct ev_io sigev;
396
397static void
398signals_init (ANSIG *base, int count)
399{
400 while (count--)
401 {
402 base->head = 0;
403 base->gotsig = 0;
404
405 ++base;
406 }
407}
408
409static void
410sighandler (int signum)
411{
412 signals [signum - 1].gotsig = 1;
413
414 if (!gotsig)
415 {
416 gotsig = 1;
417 write (sigpipe [1], &signum, 1);
418 }
419}
420
421static void
422sigcb (struct ev_io *iow, int revents)
423{
424 struct ev_signal *w;
425 int signum;
426
427 read (sigpipe [0], &revents, 1);
428 gotsig = 0;
429
430 for (signum = signalmax; signum--; )
431 if (signals [signum].gotsig)
432 {
433 signals [signum].gotsig = 0;
434
435 for (w = signals [signum].head; w; w = w->next)
436 event ((W)w, EV_SIGNAL);
437 }
438}
439
440static void
441siginit (void)
442{
443 fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
444 fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
445
446 /* rather than sort out wether we really need nb, set it */
447 fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
448 fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
449
450 ev_io_set (&sigev, sigpipe [0], EV_READ);
451 ev_io_start (&sigev);
452}
453
454/*****************************************************************************/
455
456static struct ev_idle **idles;
457static int idlemax, idlecnt;
458
459static struct ev_prepare **prepares;
460static int preparemax, preparecnt;
461
462static struct ev_check **checks;
463static int checkmax, checkcnt;
464
465/*****************************************************************************/
466
467static struct ev_child *childs [PID_HASHSIZE];
468static struct ev_signal childev; 2105static ev_signal childev;
2106
2107#ifndef WIFCONTINUED
2108# define WIFCONTINUED(status) 0
2109#endif
2110
2111/* handle a single child status event */
2112inline_speed void
2113child_reap (EV_P_ int chain, int pid, int status)
2114{
2115 ev_child *w;
2116 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
2117
2118 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2119 {
2120 if ((w->pid == pid || !w->pid)
2121 && (!traced || (w->flags & 1)))
2122 {
2123 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
2124 w->rpid = pid;
2125 w->rstatus = status;
2126 ev_feed_event (EV_A_ (W)w, EV_CHILD);
2127 }
2128 }
2129}
469 2130
470#ifndef WCONTINUED 2131#ifndef WCONTINUED
471# define WCONTINUED 0 2132# define WCONTINUED 0
472#endif 2133#endif
473 2134
2135/* called on sigchld etc., calls waitpid */
474static void 2136static void
475childcb (struct ev_signal *sw, int revents) 2137childcb (EV_P_ ev_signal *sw, int revents)
476{ 2138{
477 struct ev_child *w;
478 int pid, status; 2139 int pid, status;
479 2140
2141 /* some systems define WCONTINUED but then fail to support it (linux 2.4) */
480 while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1) 2142 if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
481 for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next) 2143 if (!WCONTINUED
482 if (w->pid == pid || !w->pid) 2144 || errno != EINVAL
483 { 2145 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
484 w->status = status; 2146 return;
485 event ((W)w, EV_CHILD); 2147
486 } 2148 /* make sure we are called again until all children have been reaped */
2149 /* we need to do it this way so that the callback gets called before we continue */
2150 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
2151
2152 child_reap (EV_A_ pid, pid, status);
2153 if ((EV_PID_HASHSIZE) > 1)
2154 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
487} 2155}
2156
2157#endif
488 2158
489/*****************************************************************************/ 2159/*****************************************************************************/
490 2160
2161#if EV_USE_IOCP
2162# include "ev_iocp.c"
2163#endif
2164#if EV_USE_PORT
2165# include "ev_port.c"
2166#endif
491#if EV_USE_KQUEUE 2167#if EV_USE_KQUEUE
492# include "ev_kqueue.c" 2168# include "ev_kqueue.c"
493#endif 2169#endif
494#if EV_USE_EPOLL 2170#if EV_USE_EPOLL
495# include "ev_epoll.c" 2171# include "ev_epoll.c"
… …
499#endif 2175#endif
500#if EV_USE_SELECT 2176#if EV_USE_SELECT
501# include "ev_select.c" 2177# include "ev_select.c"
502#endif 2178#endif
503 2179
504int 2180int ecb_cold
505ev_version_major (void) 2181ev_version_major (void) EV_THROW
506{ 2182{
507 return EV_VERSION_MAJOR; 2183 return EV_VERSION_MAJOR;
508} 2184}
509 2185
510int 2186int ecb_cold
511ev_version_minor (void) 2187ev_version_minor (void) EV_THROW
512{ 2188{
513 return EV_VERSION_MINOR; 2189 return EV_VERSION_MINOR;
514} 2190}
515 2191
516/* return true if we are running with elevated privileges and ignore env variables */ 2192/* return true if we are running with elevated privileges and should ignore env variables */
517static int 2193int inline_size ecb_cold
518enable_secure () 2194enable_secure (void)
519{ 2195{
2196#ifdef _WIN32
2197 return 0;
2198#else
520 return getuid () != geteuid () 2199 return getuid () != geteuid ()
521 || getgid () != getegid (); 2200 || getgid () != getegid ();
2201#endif
522} 2202}
523 2203
524int ev_init (int methods) 2204unsigned int ecb_cold
2205ev_supported_backends (void) EV_THROW
525{ 2206{
526 if (!ev_method) 2207 unsigned int flags = 0;
2208
2209 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
2210 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
2211 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2212 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
2213 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
2214
2215 return flags;
2216}
2217
2218unsigned int ecb_cold
2219ev_recommended_backends (void) EV_THROW
2220{
2221 unsigned int flags = ev_supported_backends ();
2222
2223#ifndef __NetBSD__
2224 /* kqueue is borked on everything but netbsd apparently */
2225 /* it usually doesn't work correctly on anything but sockets and pipes */
2226 flags &= ~EVBACKEND_KQUEUE;
2227#endif
2228#ifdef __APPLE__
2229 /* only select works correctly on that "unix-certified" platform */
2230 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2231 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2232#endif
2233#ifdef __FreeBSD__
2234 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2235#endif
2236
2237 return flags;
2238}
2239
2240unsigned int ecb_cold
2241ev_embeddable_backends (void) EV_THROW
2242{
2243 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2244
2245 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2246 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2247 flags &= ~EVBACKEND_EPOLL;
2248
2249 return flags;
2250}
2251
2252unsigned int
2253ev_backend (EV_P) EV_THROW
2254{
2255 return backend;
2256}
2257
2258#if EV_FEATURE_API
2259unsigned int
2260ev_iteration (EV_P) EV_THROW
2261{
2262 return loop_count;
2263}
2264
2265unsigned int
2266ev_depth (EV_P) EV_THROW
2267{
2268 return loop_depth;
2269}
2270
2271void
2272ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2273{
2274 io_blocktime = interval;
2275}
2276
2277void
2278ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
2279{
2280 timeout_blocktime = interval;
2281}
2282
2283void
2284ev_set_userdata (EV_P_ void *data) EV_THROW
2285{
2286 userdata = data;
2287}
2288
2289void *
2290ev_userdata (EV_P) EV_THROW
2291{
2292 return userdata;
2293}
2294
2295void
2296ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) EV_THROW
2297{
2298 invoke_cb = invoke_pending_cb;
2299}
2300
2301void
2302ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2303{
2304 release_cb = release;
2305 acquire_cb = acquire;
2306}
2307#endif
2308
2309/* initialise a loop structure, must be zero-initialised */
2310static void noinline ecb_cold
2311loop_init (EV_P_ unsigned int flags) EV_THROW
2312{
2313 if (!backend)
527 { 2314 {
2315 origflags = flags;
2316
2317#if EV_USE_REALTIME
2318 if (!have_realtime)
2319 {
2320 struct timespec ts;
2321
2322 if (!clock_gettime (CLOCK_REALTIME, &ts))
2323 have_realtime = 1;
2324 }
2325#endif
2326
528#if EV_USE_MONOTONIC 2327#if EV_USE_MONOTONIC
2328 if (!have_monotonic)
2329 {
2330 struct timespec ts;
2331
2332 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
2333 have_monotonic = 1;
2334 }
2335#endif
2336
2337 /* pid check not overridable via env */
2338#ifndef _WIN32
2339 if (flags & EVFLAG_FORKCHECK)
2340 curpid = getpid ();
2341#endif
2342
2343 if (!(flags & EVFLAG_NOENV)
2344 && !enable_secure ()
2345 && getenv ("LIBEV_FLAGS"))
2346 flags = atoi (getenv ("LIBEV_FLAGS"));
2347
2348 ev_rt_now = ev_time ();
2349 mn_now = get_clock ();
2350 now_floor = mn_now;
2351 rtmn_diff = ev_rt_now - mn_now;
2352#if EV_FEATURE_API
2353 invoke_cb = ev_invoke_pending;
2354#endif
2355
2356 io_blocktime = 0.;
2357 timeout_blocktime = 0.;
2358 backend = 0;
2359 backend_fd = -1;
2360 sig_pending = 0;
2361#if EV_ASYNC_ENABLE
2362 async_pending = 0;
2363#endif
2364 pipe_write_skipped = 0;
2365 pipe_write_wanted = 0;
2366 evpipe [0] = -1;
2367 evpipe [1] = -1;
2368#if EV_USE_INOTIFY
2369 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2370#endif
2371#if EV_USE_SIGNALFD
2372 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2373#endif
2374
2375 if (!(flags & EVBACKEND_MASK))
2376 flags |= ev_recommended_backends ();
2377
2378#if EV_USE_IOCP
2379 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2380#endif
2381#if EV_USE_PORT
2382 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
2383#endif
2384#if EV_USE_KQUEUE
2385 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
2386#endif
2387#if EV_USE_EPOLL
2388 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
2389#endif
2390#if EV_USE_POLL
2391 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
2392#endif
2393#if EV_USE_SELECT
2394 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
2395#endif
2396
2397 ev_prepare_init (&pending_w, pendingcb);
2398
2399#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2400 ev_init (&pipe_w, pipecb);
2401 ev_set_priority (&pipe_w, EV_MAXPRI);
2402#endif
2403 }
2404}
2405
2406/* free up a loop structure */
2407void ecb_cold
2408ev_loop_destroy (EV_P)
2409{
2410 int i;
2411
2412#if EV_MULTIPLICITY
2413 /* mimic free (0) */
2414 if (!EV_A)
2415 return;
2416#endif
2417
2418#if EV_CLEANUP_ENABLE
2419 /* queue cleanup watchers (and execute them) */
2420 if (expect_false (cleanupcnt))
2421 {
2422 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2423 EV_INVOKE_PENDING;
2424 }
2425#endif
2426
2427#if EV_CHILD_ENABLE
2428 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2429 {
2430 ev_ref (EV_A); /* child watcher */
2431 ev_signal_stop (EV_A_ &childev);
2432 }
2433#endif
2434
2435 if (ev_is_active (&pipe_w))
2436 {
2437 /*ev_ref (EV_A);*/
2438 /*ev_io_stop (EV_A_ &pipe_w);*/
2439
2440 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2441 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2442 }
2443
2444#if EV_USE_SIGNALFD
2445 if (ev_is_active (&sigfd_w))
2446 close (sigfd);
2447#endif
2448
2449#if EV_USE_INOTIFY
2450 if (fs_fd >= 0)
2451 close (fs_fd);
2452#endif
2453
2454 if (backend_fd >= 0)
2455 close (backend_fd);
2456
2457#if EV_USE_IOCP
2458 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2459#endif
2460#if EV_USE_PORT
2461 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
2462#endif
2463#if EV_USE_KQUEUE
2464 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
2465#endif
2466#if EV_USE_EPOLL
2467 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
2468#endif
2469#if EV_USE_POLL
2470 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
2471#endif
2472#if EV_USE_SELECT
2473 if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
2474#endif
2475
2476 for (i = NUMPRI; i--; )
2477 {
2478 array_free (pending, [i]);
2479#if EV_IDLE_ENABLE
2480 array_free (idle, [i]);
2481#endif
2482 }
2483
2484 ev_free (anfds); anfds = 0; anfdmax = 0;
2485
2486 /* have to use the microsoft-never-gets-it-right macro */
2487 array_free (rfeed, EMPTY);
2488 array_free (fdchange, EMPTY);
2489 array_free (timer, EMPTY);
2490#if EV_PERIODIC_ENABLE
2491 array_free (periodic, EMPTY);
2492#endif
2493#if EV_FORK_ENABLE
2494 array_free (fork, EMPTY);
2495#endif
2496#if EV_CLEANUP_ENABLE
2497 array_free (cleanup, EMPTY);
2498#endif
2499 array_free (prepare, EMPTY);
2500 array_free (check, EMPTY);
2501#if EV_ASYNC_ENABLE
2502 array_free (async, EMPTY);
2503#endif
2504
2505 backend = 0;
2506
2507#if EV_MULTIPLICITY
2508 if (ev_is_default_loop (EV_A))
2509#endif
2510 ev_default_loop_ptr = 0;
2511#if EV_MULTIPLICITY
2512 else
2513 ev_free (EV_A);
2514#endif
2515}
2516
2517#if EV_USE_INOTIFY
2518inline_size void infy_fork (EV_P);
2519#endif
2520
2521inline_size void
2522loop_fork (EV_P)
2523{
2524#if EV_USE_PORT
2525 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
2526#endif
2527#if EV_USE_KQUEUE
2528 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
2529#endif
2530#if EV_USE_EPOLL
2531 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
2532#endif
2533#if EV_USE_INOTIFY
2534 infy_fork (EV_A);
2535#endif
2536
2537#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2538 if (ev_is_active (&pipe_w))
2539 {
2540 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
2541
2542 ev_ref (EV_A);
2543 ev_io_stop (EV_A_ &pipe_w);
2544
2545 if (evpipe [0] >= 0)
2546 EV_WIN32_CLOSE_FD (evpipe [0]);
2547
2548 evpipe_init (EV_A);
2549 /* iterate over everything, in case we missed something before */
2550 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
2551 }
2552#endif
2553
2554 postfork = 0;
2555}
2556
2557#if EV_MULTIPLICITY
2558
2559struct ev_loop * ecb_cold
2560ev_loop_new (unsigned int flags) EV_THROW
2561{
2562 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
2563
2564 memset (EV_A, 0, sizeof (struct ev_loop));
2565 loop_init (EV_A_ flags);
2566
2567 if (ev_backend (EV_A))
2568 return EV_A;
2569
2570 ev_free (EV_A);
2571 return 0;
2572}
2573
2574#endif /* multiplicity */
2575
2576#if EV_VERIFY
2577static void noinline ecb_cold
2578verify_watcher (EV_P_ W w)
2579{
2580 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
2581
2582 if (w->pending)
2583 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
2584}
2585
2586static void noinline ecb_cold
2587verify_heap (EV_P_ ANHE *heap, int N)
2588{
2589 int i;
2590
2591 for (i = HEAP0; i < N + HEAP0; ++i)
2592 {
2593 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
2594 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
2595 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
2596
2597 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
2598 }
2599}
2600
2601static void noinline ecb_cold
2602array_verify (EV_P_ W *ws, int cnt)
2603{
2604 while (cnt--)
2605 {
2606 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
2607 verify_watcher (EV_A_ ws [cnt]);
2608 }
2609}
2610#endif
2611
2612#if EV_FEATURE_API
2613void ecb_cold
2614ev_verify (EV_P) EV_THROW
2615{
2616#if EV_VERIFY
2617 int i;
2618 WL w, w2;
2619
2620 assert (activecnt >= -1);
2621
2622 assert (fdchangemax >= fdchangecnt);
2623 for (i = 0; i < fdchangecnt; ++i)
2624 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
2625
2626 assert (anfdmax >= 0);
2627 for (i = 0; i < anfdmax; ++i)
2628 {
2629 int j = 0;
2630
2631 for (w = w2 = anfds [i].head; w; w = w->next)
2632 {
2633 verify_watcher (EV_A_ (W)w);
2634
2635 if (j++ & 1)
2636 {
2637 assert (("libev: io watcher list contains a loop", w != w2));
2638 w2 = w2->next;
2639 }
2640
2641 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
2642 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
2643 }
2644 }
2645
2646 assert (timermax >= timercnt);
2647 verify_heap (EV_A_ timers, timercnt);
2648
2649#if EV_PERIODIC_ENABLE
2650 assert (periodicmax >= periodiccnt);
2651 verify_heap (EV_A_ periodics, periodiccnt);
2652#endif
2653
2654 for (i = NUMPRI; i--; )
2655 {
2656 assert (pendingmax [i] >= pendingcnt [i]);
2657#if EV_IDLE_ENABLE
2658 assert (idleall >= 0);
2659 assert (idlemax [i] >= idlecnt [i]);
2660 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
2661#endif
2662 }
2663
2664#if EV_FORK_ENABLE
2665 assert (forkmax >= forkcnt);
2666 array_verify (EV_A_ (W *)forks, forkcnt);
2667#endif
2668
2669#if EV_CLEANUP_ENABLE
2670 assert (cleanupmax >= cleanupcnt);
2671 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
2672#endif
2673
2674#if EV_ASYNC_ENABLE
2675 assert (asyncmax >= asynccnt);
2676 array_verify (EV_A_ (W *)asyncs, asynccnt);
2677#endif
2678
2679#if EV_PREPARE_ENABLE
2680 assert (preparemax >= preparecnt);
2681 array_verify (EV_A_ (W *)prepares, preparecnt);
2682#endif
2683
2684#if EV_CHECK_ENABLE
2685 assert (checkmax >= checkcnt);
2686 array_verify (EV_A_ (W *)checks, checkcnt);
2687#endif
2688
2689# if 0
2690#if EV_CHILD_ENABLE
2691 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2692 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
2693#endif
2694# endif
2695#endif
2696}
2697#endif
2698
2699#if EV_MULTIPLICITY
2700struct ev_loop * ecb_cold
2701#else
2702int
2703#endif
2704ev_default_loop (unsigned int flags) EV_THROW
2705{
2706 if (!ev_default_loop_ptr)
2707 {
2708#if EV_MULTIPLICITY
2709 EV_P = ev_default_loop_ptr = &default_loop_struct;
2710#else
2711 ev_default_loop_ptr = 1;
2712#endif
2713
2714 loop_init (EV_A_ flags);
2715
2716 if (ev_backend (EV_A))
2717 {
2718#if EV_CHILD_ENABLE
2719 ev_signal_init (&childev, childcb, SIGCHLD);
2720 ev_set_priority (&childev, EV_MAXPRI);
2721 ev_signal_start (EV_A_ &childev);
2722 ev_unref (EV_A); /* child watcher should not keep loop alive */
2723#endif
2724 }
2725 else
2726 ev_default_loop_ptr = 0;
2727 }
2728
2729 return ev_default_loop_ptr;
2730}
2731
2732void
2733ev_loop_fork (EV_P) EV_THROW
2734{
2735 postfork = 1;
2736}
2737
2738/*****************************************************************************/
2739
2740void
2741ev_invoke (EV_P_ void *w, int revents)
2742{
2743 EV_CB_INVOKE ((W)w, revents);
2744}
2745
2746unsigned int
2747ev_pending_count (EV_P) EV_THROW
2748{
2749 int pri;
2750 unsigned int count = 0;
2751
2752 for (pri = NUMPRI; pri--; )
2753 count += pendingcnt [pri];
2754
2755 return count;
2756}
2757
2758void noinline
2759ev_invoke_pending (EV_P)
2760{
2761 pendingpri = NUMPRI;
2762
2763 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
2764 {
2765 --pendingpri;
2766
2767 while (pendingcnt [pendingpri])
2768 {
2769 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2770
2771 p->w->pending = 0;
2772 EV_CB_INVOKE (p->w, p->events);
2773 EV_FREQUENT_CHECK;
2774 }
2775 }
2776}
2777
2778#if EV_IDLE_ENABLE
2779/* make idle watchers pending. this handles the "call-idle */
2780/* only when higher priorities are idle" logic */
2781inline_size void
2782idle_reify (EV_P)
2783{
2784 if (expect_false (idleall))
2785 {
2786 int pri;
2787
2788 for (pri = NUMPRI; pri--; )
2789 {
2790 if (pendingcnt [pri])
2791 break;
2792
2793 if (idlecnt [pri])
2794 {
2795 queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
2796 break;
2797 }
2798 }
2799 }
2800}
2801#endif
2802
2803/* make timers pending */
2804inline_size void
2805timers_reify (EV_P)
2806{
2807 EV_FREQUENT_CHECK;
2808
2809 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
2810 {
2811 do
2812 {
2813 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
2814
2815 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
2816
2817 /* first reschedule or stop timer */
2818 if (w->repeat)
2819 {
2820 ev_at (w) += w->repeat;
2821 if (ev_at (w) < mn_now)
2822 ev_at (w) = mn_now;
2823
2824 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
2825
2826 ANHE_at_cache (timers [HEAP0]);
2827 downheap (timers, timercnt, HEAP0);
2828 }
2829 else
2830 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
2831
2832 EV_FREQUENT_CHECK;
2833 feed_reverse (EV_A_ (W)w);
2834 }
2835 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
2836
2837 feed_reverse_done (EV_A_ EV_TIMER);
2838 }
2839}
2840
2841#if EV_PERIODIC_ENABLE
2842
2843static void noinline
2844periodic_recalc (EV_P_ ev_periodic *w)
2845{
2846 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
2847 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
2848
2849 /* the above almost always errs on the low side */
2850 while (at <= ev_rt_now)
2851 {
2852 ev_tstamp nat = at + w->interval;
2853
2854 /* when resolution fails us, we use ev_rt_now */
2855 if (expect_false (nat == at))
2856 {
2857 at = ev_rt_now;
2858 break;
2859 }
2860
2861 at = nat;
2862 }
2863
2864 ev_at (w) = at;
2865}
2866
2867/* make periodics pending */
2868inline_size void
2869periodics_reify (EV_P)
2870{
2871 EV_FREQUENT_CHECK;
2872
2873 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2874 {
2875 do
2876 {
2877 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2878
2879 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
2880
2881 /* first reschedule or stop timer */
2882 if (w->reschedule_cb)
2883 {
2884 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2885
2886 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
2887
2888 ANHE_at_cache (periodics [HEAP0]);
2889 downheap (periodics, periodiccnt, HEAP0);
2890 }
2891 else if (w->interval)
2892 {
2893 periodic_recalc (EV_A_ w);
2894 ANHE_at_cache (periodics [HEAP0]);
2895 downheap (periodics, periodiccnt, HEAP0);
2896 }
2897 else
2898 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
2899
2900 EV_FREQUENT_CHECK;
2901 feed_reverse (EV_A_ (W)w);
2902 }
2903 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
2904
2905 feed_reverse_done (EV_A_ EV_PERIODIC);
2906 }
2907}
2908
2909/* simply recalculate all periodics */
2910/* TODO: maybe ensure that at least one event happens when jumping forward? */
2911static void noinline ecb_cold
2912periodics_reschedule (EV_P)
2913{
2914 int i;
2915
2916 /* adjust periodics after time jump */
2917 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
2918 {
2919 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2920
2921 if (w->reschedule_cb)
2922 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2923 else if (w->interval)
2924 periodic_recalc (EV_A_ w);
2925
2926 ANHE_at_cache (periodics [i]);
2927 }
2928
2929 reheap (periodics, periodiccnt);
2930}
2931#endif
2932
2933/* adjust all timers by a given offset */
2934static void noinline ecb_cold
2935timers_reschedule (EV_P_ ev_tstamp adjust)
2936{
2937 int i;
2938
2939 for (i = 0; i < timercnt; ++i)
2940 {
2941 ANHE *he = timers + i + HEAP0;
2942 ANHE_w (*he)->at += adjust;
2943 ANHE_at_cache (*he);
2944 }
2945}
2946
2947/* fetch new monotonic and realtime times from the kernel */
2948/* also detect if there was a timejump, and act accordingly */
2949inline_speed void
2950time_update (EV_P_ ev_tstamp max_block)
2951{
2952#if EV_USE_MONOTONIC
2953 if (expect_true (have_monotonic))
2954 {
2955 int i;
2956 ev_tstamp odiff = rtmn_diff;
2957
2958 mn_now = get_clock ();
2959
2960 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
2961 /* interpolate in the meantime */
2962 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
2963 {
2964 ev_rt_now = rtmn_diff + mn_now;
2965 return;
2966 }
2967
2968 now_floor = mn_now;
2969 ev_rt_now = ev_time ();
2970
2971 /* loop a few times, before making important decisions.
2972 * on the choice of "4": one iteration isn't enough,
2973 * in case we get preempted during the calls to
2974 * ev_time and get_clock. a second call is almost guaranteed
2975 * to succeed in that case, though. and looping a few more times
2976 * doesn't hurt either as we only do this on time-jumps or
2977 * in the unlikely event of having been preempted here.
2978 */
2979 for (i = 4; --i; )
2980 {
2981 ev_tstamp diff;
2982 rtmn_diff = ev_rt_now - mn_now;
2983
2984 diff = odiff - rtmn_diff;
2985
2986 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2987 return; /* all is well */
2988
2989 ev_rt_now = ev_time ();
2990 mn_now = get_clock ();
2991 now_floor = mn_now;
2992 }
2993
2994 /* no timer adjustment, as the monotonic clock doesn't jump */
2995 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
2996# if EV_PERIODIC_ENABLE
2997 periodics_reschedule (EV_A);
2998# endif
2999 }
3000 else
3001#endif
3002 {
3003 ev_rt_now = ev_time ();
3004
3005 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
3006 {
3007 /* adjust timers. this is easy, as the offset is the same for all of them */
3008 timers_reschedule (EV_A_ ev_rt_now - mn_now);
3009#if EV_PERIODIC_ENABLE
3010 periodics_reschedule (EV_A);
3011#endif
3012 }
3013
3014 mn_now = ev_rt_now;
3015 }
3016}
3017
3018int
3019ev_run (EV_P_ int flags)
3020{
3021#if EV_FEATURE_API
3022 ++loop_depth;
3023#endif
3024
3025 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3026
3027 loop_done = EVBREAK_CANCEL;
3028
3029 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
3030
3031 do
3032 {
3033#if EV_VERIFY >= 2
3034 ev_verify (EV_A);
3035#endif
3036
3037#ifndef _WIN32
3038 if (expect_false (curpid)) /* penalise the forking check even more */
3039 if (expect_false (getpid () != curpid))
3040 {
3041 curpid = getpid ();
3042 postfork = 1;
3043 }
3044#endif
3045
3046#if EV_FORK_ENABLE
3047 /* we might have forked, so queue fork handlers */
3048 if (expect_false (postfork))
3049 if (forkcnt)
3050 {
3051 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
3052 EV_INVOKE_PENDING;
3053 }
3054#endif
3055
3056#if EV_PREPARE_ENABLE
3057 /* queue prepare watchers (and execute them) */
3058 if (expect_false (preparecnt))
3059 {
3060 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
3061 EV_INVOKE_PENDING;
3062 }
3063#endif
3064
3065 if (expect_false (loop_done))
3066 break;
3067
3068 /* we might have forked, so reify kernel state if necessary */
3069 if (expect_false (postfork))
3070 loop_fork (EV_A);
3071
3072 /* update fd-related kernel structures */
3073 fd_reify (EV_A);
3074
3075 /* calculate blocking time */
529 { 3076 {
530 struct timespec ts; 3077 ev_tstamp waittime = 0.;
531 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 3078 ev_tstamp sleeptime = 0.;
532 have_monotonic = 1; 3079
3080 /* remember old timestamp for io_blocktime calculation */
3081 ev_tstamp prev_mn_now = mn_now;
3082
3083 /* update time to cancel out callback processing overhead */
3084 time_update (EV_A_ 1e100);
3085
3086 /* from now on, we want a pipe-wake-up */
3087 pipe_write_wanted = 1;
3088
3089 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3090
3091 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
3092 {
3093 waittime = MAX_BLOCKTIME;
3094
3095 if (timercnt)
3096 {
3097 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
3098 if (waittime > to) waittime = to;
3099 }
3100
3101#if EV_PERIODIC_ENABLE
3102 if (periodiccnt)
3103 {
3104 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
3105 if (waittime > to) waittime = to;
3106 }
3107#endif
3108
3109 /* don't let timeouts decrease the waittime below timeout_blocktime */
3110 if (expect_false (waittime < timeout_blocktime))
3111 waittime = timeout_blocktime;
3112
3113 /* at this point, we NEED to wait, so we have to ensure */
3114 /* to pass a minimum nonzero value to the backend */
3115 if (expect_false (waittime < backend_mintime))
3116 waittime = backend_mintime;
3117
3118 /* extra check because io_blocktime is commonly 0 */
3119 if (expect_false (io_blocktime))
3120 {
3121 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3122
3123 if (sleeptime > waittime - backend_mintime)
3124 sleeptime = waittime - backend_mintime;
3125
3126 if (expect_true (sleeptime > 0.))
3127 {
3128 ev_sleep (sleeptime);
3129 waittime -= sleeptime;
3130 }
3131 }
3132 }
3133
3134#if EV_FEATURE_API
3135 ++loop_count;
3136#endif
3137 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
3138 backend_poll (EV_A_ waittime);
3139 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3140
3141 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3142
3143 ECB_MEMORY_FENCE_ACQUIRE;
3144 if (pipe_write_skipped)
3145 {
3146 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3147 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3148 }
3149
3150
3151 /* update ev_rt_now, do magic */
3152 time_update (EV_A_ waittime + sleeptime);
533 } 3153 }
534#endif
535 3154
536 ev_now = ev_time (); 3155 /* queue pending timers and reschedule them */
537 now = get_clock (); 3156 timers_reify (EV_A); /* relative timers called last */
538 now_floor = now; 3157#if EV_PERIODIC_ENABLE
539 diff = ev_now - now; 3158 periodics_reify (EV_A); /* absolute timers called first */
540
541 if (pipe (sigpipe))
542 return 0;
543
544 if (methods == EVMETHOD_AUTO)
545 if (!enable_secure () && getenv ("LIBEV_METHODS"))
546 methods = atoi (getenv ("LIBEV_METHODS"));
547 else
548 methods = EVMETHOD_ANY;
549
550 ev_method = 0;
551#if EV_USE_KQUEUE
552 if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);
553#endif 3159#endif
554#if EV_USE_EPOLL
555 if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);
556#endif
557#if EV_USE_POLL
558 if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);
559#endif
560#if EV_USE_SELECT
561 if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);
562#endif
563 3160
564 if (ev_method) 3161#if EV_IDLE_ENABLE
3162 /* queue idle watchers unless other events are pending */
3163 idle_reify (EV_A);
3164#endif
3165
3166#if EV_CHECK_ENABLE
3167 /* queue check watchers, to be executed first */
3168 if (expect_false (checkcnt))
3169 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3170#endif
3171
3172 EV_INVOKE_PENDING;
3173 }
3174 while (expect_true (
3175 activecnt
3176 && !loop_done
3177 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3178 ));
3179
3180 if (loop_done == EVBREAK_ONE)
3181 loop_done = EVBREAK_CANCEL;
3182
3183#if EV_FEATURE_API
3184 --loop_depth;
3185#endif
3186
3187 return activecnt;
3188}
3189
3190void
3191ev_break (EV_P_ int how) EV_THROW
3192{
3193 loop_done = how;
3194}
3195
3196void
3197ev_ref (EV_P) EV_THROW
3198{
3199 ++activecnt;
3200}
3201
3202void
3203ev_unref (EV_P) EV_THROW
3204{
3205 --activecnt;
3206}
3207
3208void
3209ev_now_update (EV_P) EV_THROW
3210{
3211 time_update (EV_A_ 1e100);
3212}
3213
3214void
3215ev_suspend (EV_P) EV_THROW
3216{
3217 ev_now_update (EV_A);
3218}
3219
3220void
3221ev_resume (EV_P) EV_THROW
3222{
3223 ev_tstamp mn_prev = mn_now;
3224
3225 ev_now_update (EV_A);
3226 timers_reschedule (EV_A_ mn_now - mn_prev);
3227#if EV_PERIODIC_ENABLE
3228 /* TODO: really do this? */
3229 periodics_reschedule (EV_A);
3230#endif
3231}
3232
3233/*****************************************************************************/
3234/* singly-linked list management, used when the expected list length is short */
3235
3236inline_size void
3237wlist_add (WL *head, WL elem)
3238{
3239 elem->next = *head;
3240 *head = elem;
3241}
3242
3243inline_size void
3244wlist_del (WL *head, WL elem)
3245{
3246 while (*head)
3247 {
3248 if (expect_true (*head == elem))
565 { 3249 {
566 ev_watcher_init (&sigev, sigcb); 3250 *head = elem->next;
567 siginit (); 3251 break;
568
569 ev_signal_init (&childev, childcb, SIGCHLD);
570 ev_signal_start (&childev);
571 } 3252 }
3253
3254 head = &(*head)->next;
3255 }
3256}
3257
3258/* internal, faster, version of ev_clear_pending */
3259inline_speed void
3260clear_pending (EV_P_ W w)
3261{
3262 if (w->pending)
572 } 3263 {
3264 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
3265 w->pending = 0;
3266 }
3267}
573 3268
574 return ev_method; 3269int
3270ev_clear_pending (EV_P_ void *w) EV_THROW
3271{
3272 W w_ = (W)w;
3273 int pending = w_->pending;
3274
3275 if (expect_true (pending))
3276 {
3277 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3278 p->w = (W)&pending_w;
3279 w_->pending = 0;
3280 return p->events;
3281 }
3282 else
3283 return 0;
3284}
3285
3286inline_size void
3287pri_adjust (EV_P_ W w)
3288{
3289 int pri = ev_priority (w);
3290 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
3291 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
3292 ev_set_priority (w, pri);
3293}
3294
3295inline_speed void
3296ev_start (EV_P_ W w, int active)
3297{
3298 pri_adjust (EV_A_ w);
3299 w->active = active;
3300 ev_ref (EV_A);
3301}
3302
3303inline_size void
3304ev_stop (EV_P_ W w)
3305{
3306 ev_unref (EV_A);
3307 w->active = 0;
575} 3308}
576 3309
577/*****************************************************************************/ 3310/*****************************************************************************/
578 3311
579void 3312void noinline
580ev_fork_prepare (void) 3313ev_io_start (EV_P_ ev_io *w) EV_THROW
581{ 3314{
582 /* nop */ 3315 int fd = w->fd;
583}
584 3316
585void 3317 if (expect_false (ev_is_active (w)))
586ev_fork_parent (void) 3318 return;
587{
588 /* nop */
589}
590 3319
591void 3320 assert (("libev: ev_io_start called with negative fd", fd >= 0));
592ev_fork_child (void) 3321 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
593{
594#if EV_USE_EPOLL
595 if (ev_method == EVMETHOD_EPOLL)
596 epoll_postfork_child ();
597#endif
598 3322
599 ev_io_stop (&sigev); 3323 EV_FREQUENT_CHECK;
600 close (sigpipe [0]);
601 close (sigpipe [1]);
602 pipe (sigpipe);
603 siginit ();
604}
605 3324
606/*****************************************************************************/ 3325 ev_start (EV_A_ (W)w, 1);
3326 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
3327 wlist_add (&anfds[fd].head, (WL)w);
607 3328
608static void 3329 /* common bug, apparently */
609call_pending (void) 3330 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
610{
611 int pri;
612 3331
613 for (pri = NUMPRI; pri--; ) 3332 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
614 while (pendingcnt [pri]) 3333 w->events &= ~EV__IOFDSET;
3334
3335 EV_FREQUENT_CHECK;
3336}
3337
3338void noinline
3339ev_io_stop (EV_P_ ev_io *w) EV_THROW
3340{
3341 clear_pending (EV_A_ (W)w);
3342 if (expect_false (!ev_is_active (w)))
3343 return;
3344
3345 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3346
3347 EV_FREQUENT_CHECK;
3348
3349 wlist_del (&anfds[w->fd].head, (WL)w);
3350 ev_stop (EV_A_ (W)w);
3351
3352 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
3353
3354 EV_FREQUENT_CHECK;
3355}
3356
3357void noinline
3358ev_timer_start (EV_P_ ev_timer *w) EV_THROW
3359{
3360 if (expect_false (ev_is_active (w)))
3361 return;
3362
3363 ev_at (w) += mn_now;
3364
3365 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
3366
3367 EV_FREQUENT_CHECK;
3368
3369 ++timercnt;
3370 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
3371 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
3372 ANHE_w (timers [ev_active (w)]) = (WT)w;
3373 ANHE_at_cache (timers [ev_active (w)]);
3374 upheap (timers, ev_active (w));
3375
3376 EV_FREQUENT_CHECK;
3377
3378 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
3379}
3380
3381void noinline
3382ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
3383{
3384 clear_pending (EV_A_ (W)w);
3385 if (expect_false (!ev_is_active (w)))
3386 return;
3387
3388 EV_FREQUENT_CHECK;
3389
3390 {
3391 int active = ev_active (w);
3392
3393 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
3394
3395 --timercnt;
3396
3397 if (expect_true (active < timercnt + HEAP0))
615 { 3398 {
616 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3399 timers [active] = timers [timercnt + HEAP0];
617 3400 adjustheap (timers, timercnt, active);
618 if (p->w)
619 {
620 p->w->pending = 0;
621 p->w->cb (p->w, p->events);
622 }
623 } 3401 }
624} 3402 }
625 3403
626static void 3404 ev_at (w) -= mn_now;
627timers_reify (void)
628{
629 while (timercnt && timers [0]->at <= now)
630 {
631 struct ev_timer *w = timers [0];
632 3405
633 /* first reschedule or stop timer */ 3406 ev_stop (EV_A_ (W)w);
3407
3408 EV_FREQUENT_CHECK;
3409}
3410
3411void noinline
3412ev_timer_again (EV_P_ ev_timer *w) EV_THROW
3413{
3414 EV_FREQUENT_CHECK;
3415
3416 clear_pending (EV_A_ (W)w);
3417
3418 if (ev_is_active (w))
3419 {
634 if (w->repeat) 3420 if (w->repeat)
635 { 3421 {
636 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
637 w->at = now + w->repeat; 3422 ev_at (w) = mn_now + w->repeat;
638 downheap ((WT *)timers, timercnt, 0); 3423 ANHE_at_cache (timers [ev_active (w)]);
3424 adjustheap (timers, timercnt, ev_active (w));
639 } 3425 }
640 else 3426 else
641 ev_timer_stop (w); /* nonrepeating: stop timer */ 3427 ev_timer_stop (EV_A_ w);
642
643 event ((W)w, EV_TIMEOUT);
644 }
645}
646
647static void
648periodics_reify (void)
649{
650 while (periodiccnt && periodics [0]->at <= ev_now)
651 { 3428 }
652 struct ev_periodic *w = periodics [0]; 3429 else if (w->repeat)
3430 {
3431 ev_at (w) = w->repeat;
3432 ev_timer_start (EV_A_ w);
3433 }
653 3434
654 /* first reschedule or stop timer */ 3435 EV_FREQUENT_CHECK;
3436}
3437
3438ev_tstamp
3439ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3440{
3441 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3442}
3443
3444#if EV_PERIODIC_ENABLE
3445void noinline
3446ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
3447{
3448 if (expect_false (ev_is_active (w)))
3449 return;
3450
3451 if (w->reschedule_cb)
3452 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
655 if (w->interval) 3453 else if (w->interval)
3454 {
3455 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
3456 periodic_recalc (EV_A_ w);
3457 }
3458 else
3459 ev_at (w) = w->offset;
3460
3461 EV_FREQUENT_CHECK;
3462
3463 ++periodiccnt;
3464 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
3465 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
3466 ANHE_w (periodics [ev_active (w)]) = (WT)w;
3467 ANHE_at_cache (periodics [ev_active (w)]);
3468 upheap (periodics, ev_active (w));
3469
3470 EV_FREQUENT_CHECK;
3471
3472 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
3473}
3474
3475void noinline
3476ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
3477{
3478 clear_pending (EV_A_ (W)w);
3479 if (expect_false (!ev_is_active (w)))
3480 return;
3481
3482 EV_FREQUENT_CHECK;
3483
3484 {
3485 int active = ev_active (w);
3486
3487 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
3488
3489 --periodiccnt;
3490
3491 if (expect_true (active < periodiccnt + HEAP0))
3492 {
3493 periodics [active] = periodics [periodiccnt + HEAP0];
3494 adjustheap (periodics, periodiccnt, active);
3495 }
3496 }
3497
3498 ev_stop (EV_A_ (W)w);
3499
3500 EV_FREQUENT_CHECK;
3501}
3502
3503void noinline
3504ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
3505{
3506 /* TODO: use adjustheap and recalculation */
3507 ev_periodic_stop (EV_A_ w);
3508 ev_periodic_start (EV_A_ w);
3509}
3510#endif
3511
3512#ifndef SA_RESTART
3513# define SA_RESTART 0
3514#endif
3515
3516#if EV_SIGNAL_ENABLE
3517
3518void noinline
3519ev_signal_start (EV_P_ ev_signal *w) EV_THROW
3520{
3521 if (expect_false (ev_is_active (w)))
3522 return;
3523
3524 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
3525
3526#if EV_MULTIPLICITY
3527 assert (("libev: a signal must not be attached to two different loops",
3528 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
3529
3530 signals [w->signum - 1].loop = EV_A;
3531#endif
3532
3533 EV_FREQUENT_CHECK;
3534
3535#if EV_USE_SIGNALFD
3536 if (sigfd == -2)
3537 {
3538 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
3539 if (sigfd < 0 && errno == EINVAL)
3540 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
3541
3542 if (sigfd >= 0)
656 { 3543 {
657 w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval; 3544 fd_intern (sigfd); /* doing it twice will not hurt */
658 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now)); 3545
659 downheap ((WT *)periodics, periodiccnt, 0); 3546 sigemptyset (&sigfd_set);
3547
3548 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3549 ev_set_priority (&sigfd_w, EV_MAXPRI);
3550 ev_io_start (EV_A_ &sigfd_w);
3551 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3552 }
3553 }
3554
3555 if (sigfd >= 0)
3556 {
3557 /* TODO: check .head */
3558 sigaddset (&sigfd_set, w->signum);
3559 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3560
3561 signalfd (sigfd, &sigfd_set, 0);
3562 }
3563#endif
3564
3565 ev_start (EV_A_ (W)w, 1);
3566 wlist_add (&signals [w->signum - 1].head, (WL)w);
3567
3568 if (!((WL)w)->next)
3569# if EV_USE_SIGNALFD
3570 if (sigfd < 0) /*TODO*/
3571# endif
3572 {
3573# ifdef _WIN32
3574 evpipe_init (EV_A);
3575
3576 signal (w->signum, ev_sighandler);
3577# else
3578 struct sigaction sa;
3579
3580 evpipe_init (EV_A);
3581
3582 sa.sa_handler = ev_sighandler;
3583 sigfillset (&sa.sa_mask);
3584 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
3585 sigaction (w->signum, &sa, 0);
3586
3587 if (origflags & EVFLAG_NOSIGMASK)
3588 {
3589 sigemptyset (&sa.sa_mask);
3590 sigaddset (&sa.sa_mask, w->signum);
3591 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3592 }
3593#endif
3594 }
3595
3596 EV_FREQUENT_CHECK;
3597}
3598
3599void noinline
3600ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
3601{
3602 clear_pending (EV_A_ (W)w);
3603 if (expect_false (!ev_is_active (w)))
3604 return;
3605
3606 EV_FREQUENT_CHECK;
3607
3608 wlist_del (&signals [w->signum - 1].head, (WL)w);
3609 ev_stop (EV_A_ (W)w);
3610
3611 if (!signals [w->signum - 1].head)
3612 {
3613#if EV_MULTIPLICITY
3614 signals [w->signum - 1].loop = 0; /* unattach from signal */
3615#endif
3616#if EV_USE_SIGNALFD
3617 if (sigfd >= 0)
3618 {
3619 sigset_t ss;
3620
3621 sigemptyset (&ss);
3622 sigaddset (&ss, w->signum);
3623 sigdelset (&sigfd_set, w->signum);
3624
3625 signalfd (sigfd, &sigfd_set, 0);
3626 sigprocmask (SIG_UNBLOCK, &ss, 0);
660 } 3627 }
661 else 3628 else
662 ev_periodic_stop (w); /* nonrepeating: stop timer */ 3629#endif
663 3630 signal (w->signum, SIG_DFL);
664 event ((W)w, EV_PERIODIC);
665 }
666}
667
668static void
669periodics_reschedule (ev_tstamp diff)
670{
671 int i;
672
673 /* adjust periodics after time jump */
674 for (i = 0; i < periodiccnt; ++i)
675 { 3631 }
676 struct ev_periodic *w = periodics [i];
677 3632
678 if (w->interval) 3633 EV_FREQUENT_CHECK;
3634}
3635
3636#endif
3637
3638#if EV_CHILD_ENABLE
3639
3640void
3641ev_child_start (EV_P_ ev_child *w) EV_THROW
3642{
3643#if EV_MULTIPLICITY
3644 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
3645#endif
3646 if (expect_false (ev_is_active (w)))
3647 return;
3648
3649 EV_FREQUENT_CHECK;
3650
3651 ev_start (EV_A_ (W)w, 1);
3652 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3653
3654 EV_FREQUENT_CHECK;
3655}
3656
3657void
3658ev_child_stop (EV_P_ ev_child *w) EV_THROW
3659{
3660 clear_pending (EV_A_ (W)w);
3661 if (expect_false (!ev_is_active (w)))
3662 return;
3663
3664 EV_FREQUENT_CHECK;
3665
3666 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
3667 ev_stop (EV_A_ (W)w);
3668
3669 EV_FREQUENT_CHECK;
3670}
3671
3672#endif
3673
3674#if EV_STAT_ENABLE
3675
3676# ifdef _WIN32
3677# undef lstat
3678# define lstat(a,b) _stati64 (a,b)
3679# endif
3680
3681#define DEF_STAT_INTERVAL 5.0074891
3682#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
3683#define MIN_STAT_INTERVAL 0.1074891
3684
3685static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
3686
3687#if EV_USE_INOTIFY
3688
3689/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
3690# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
3691
3692static void noinline
3693infy_add (EV_P_ ev_stat *w)
3694{
3695 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);
3696
3697 if (w->wd >= 0)
3698 {
3699 struct statfs sfs;
3700
3701 /* now local changes will be tracked by inotify, but remote changes won't */
3702 /* unless the filesystem is known to be local, we therefore still poll */
3703 /* also do poll on <2.6.25, but with normal frequency */
3704
3705 if (!fs_2625)
3706 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3707 else if (!statfs (w->path, &sfs)
3708 && (sfs.f_type == 0x1373 /* devfs */
3709 || sfs.f_type == 0xEF53 /* ext2/3 */
3710 || sfs.f_type == 0x3153464a /* jfs */
3711 || sfs.f_type == 0x52654973 /* reiser3 */
3712 || sfs.f_type == 0x01021994 /* tempfs */
3713 || sfs.f_type == 0x58465342 /* xfs */))
3714 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3715 else
3716 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3717 }
3718 else
3719 {
3720 /* can't use inotify, continue to stat */
3721 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3722
3723 /* if path is not there, monitor some parent directory for speedup hints */
3724 /* note that exceeding the hardcoded path limit is not a correctness issue, */
3725 /* but an efficiency issue only */
3726 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
679 { 3727 {
680 ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval; 3728 char path [4096];
3729 strcpy (path, w->path);
681 3730
682 if (fabs (diff) >= 1e-4) 3731 do
683 { 3732 {
684 ev_periodic_stop (w); 3733 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
685 ev_periodic_start (w); 3734 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
686 3735
687 i = 0; /* restart loop, inefficient, but time jumps should be rare */ 3736 char *pend = strrchr (path, '/');
3737
3738 if (!pend || pend == path)
3739 break;
3740
3741 *pend = 0;
3742 w->wd = inotify_add_watch (fs_fd, path, mask);
3743 }
3744 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3745 }
3746 }
3747
3748 if (w->wd >= 0)
3749 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3750
3751 /* now re-arm timer, if required */
3752 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3753 ev_timer_again (EV_A_ &w->timer);
3754 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3755}
3756
3757static void noinline
3758infy_del (EV_P_ ev_stat *w)
3759{
3760 int slot;
3761 int wd = w->wd;
3762
3763 if (wd < 0)
3764 return;
3765
3766 w->wd = -2;
3767 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
3768 wlist_del (&fs_hash [slot].head, (WL)w);
3769
3770 /* remove this watcher, if others are watching it, they will rearm */
3771 inotify_rm_watch (fs_fd, wd);
3772}
3773
3774static void noinline
3775infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3776{
3777 if (slot < 0)
3778 /* overflow, need to check for all hash slots */
3779 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3780 infy_wd (EV_A_ slot, wd, ev);
3781 else
3782 {
3783 WL w_;
3784
3785 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
3786 {
3787 ev_stat *w = (ev_stat *)w_;
3788 w_ = w_->next; /* lets us remove this watcher and all before it */
3789
3790 if (w->wd == wd || wd == -1)
3791 {
3792 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
3793 {
3794 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
3795 w->wd = -1;
3796 infy_add (EV_A_ w); /* re-add, no matter what */
3797 }
3798
3799 stat_timer_cb (EV_A_ &w->timer, 0);
688 } 3800 }
689 } 3801 }
690 } 3802 }
691} 3803}
692 3804
693static int 3805static void
694time_update_monotonic (void) 3806infy_cb (EV_P_ ev_io *w, int revents)
695{ 3807{
696 now = get_clock (); 3808 char buf [EV_INOTIFY_BUFSIZE];
3809 int ofs;
3810 int len = read (fs_fd, buf, sizeof (buf));
697 3811
698 if (expect_true (now - now_floor < MIN_TIMEJUMP * .5)) 3812 for (ofs = 0; ofs < len; )
3813 {
3814 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
3815 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3816 ofs += sizeof (struct inotify_event) + ev->len;
699 { 3817 }
700 ev_now = now + diff; 3818}
3819
3820inline_size void ecb_cold
3821ev_check_2625 (EV_P)
3822{
3823 /* kernels < 2.6.25 are borked
3824 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3825 */
3826 if (ev_linux_version () < 0x020619)
701 return 0; 3827 return;
3828
3829 fs_2625 = 1;
3830}
3831
3832inline_size int
3833infy_newfd (void)
3834{
3835#if defined IN_CLOEXEC && defined IN_NONBLOCK
3836 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3837 if (fd >= 0)
3838 return fd;
3839#endif
3840 return inotify_init ();
3841}
3842
3843inline_size void
3844infy_init (EV_P)
3845{
3846 if (fs_fd != -2)
3847 return;
3848
3849 fs_fd = -1;
3850
3851 ev_check_2625 (EV_A);
3852
3853 fs_fd = infy_newfd ();
3854
3855 if (fs_fd >= 0)
702 } 3856 {
3857 fd_intern (fs_fd);
3858 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
3859 ev_set_priority (&fs_w, EV_MAXPRI);
3860 ev_io_start (EV_A_ &fs_w);
3861 ev_unref (EV_A);
3862 }
3863}
3864
3865inline_size void
3866infy_fork (EV_P)
3867{
3868 int slot;
3869
3870 if (fs_fd < 0)
3871 return;
3872
3873 ev_ref (EV_A);
3874 ev_io_stop (EV_A_ &fs_w);
3875 close (fs_fd);
3876 fs_fd = infy_newfd ();
3877
3878 if (fs_fd >= 0)
3879 {
3880 fd_intern (fs_fd);
3881 ev_io_set (&fs_w, fs_fd, EV_READ);
3882 ev_io_start (EV_A_ &fs_w);
3883 ev_unref (EV_A);
3884 }
3885
3886 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
3887 {
3888 WL w_ = fs_hash [slot].head;
3889 fs_hash [slot].head = 0;
3890
3891 while (w_)
3892 {
3893 ev_stat *w = (ev_stat *)w_;
3894 w_ = w_->next; /* lets us add this watcher */
3895
3896 w->wd = -1;
3897
3898 if (fs_fd >= 0)
3899 infy_add (EV_A_ w); /* re-add, no matter what */
3900 else
3901 {
3902 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
3903 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3904 ev_timer_again (EV_A_ &w->timer);
3905 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3906 }
3907 }
3908 }
3909}
3910
3911#endif
3912
3913#ifdef _WIN32
3914# define EV_LSTAT(p,b) _stati64 (p, b)
3915#else
3916# define EV_LSTAT(p,b) lstat (p, b)
3917#endif
3918
3919void
3920ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
3921{
3922 if (lstat (w->path, &w->attr) < 0)
3923 w->attr.st_nlink = 0;
3924 else if (!w->attr.st_nlink)
3925 w->attr.st_nlink = 1;
3926}
3927
3928static void noinline
3929stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3930{
3931 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3932
3933 ev_statdata prev = w->attr;
3934 ev_stat_stat (EV_A_ w);
3935
3936 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
3937 if (
3938 prev.st_dev != w->attr.st_dev
3939 || prev.st_ino != w->attr.st_ino
3940 || prev.st_mode != w->attr.st_mode
3941 || prev.st_nlink != w->attr.st_nlink
3942 || prev.st_uid != w->attr.st_uid
3943 || prev.st_gid != w->attr.st_gid
3944 || prev.st_rdev != w->attr.st_rdev
3945 || prev.st_size != w->attr.st_size
3946 || prev.st_atime != w->attr.st_atime
3947 || prev.st_mtime != w->attr.st_mtime
3948 || prev.st_ctime != w->attr.st_ctime
3949 ) {
3950 /* we only update w->prev on actual differences */
3951 /* in case we test more often than invoke the callback, */
3952 /* to ensure that prev is always different to attr */
3953 w->prev = prev;
3954
3955 #if EV_USE_INOTIFY
3956 if (fs_fd >= 0)
3957 {
3958 infy_del (EV_A_ w);
3959 infy_add (EV_A_ w);
3960 ev_stat_stat (EV_A_ w); /* avoid race... */
3961 }
3962 #endif
3963
3964 ev_feed_event (EV_A_ w, EV_STAT);
3965 }
3966}
3967
3968void
3969ev_stat_start (EV_P_ ev_stat *w) EV_THROW
3970{
3971 if (expect_false (ev_is_active (w)))
3972 return;
3973
3974 ev_stat_stat (EV_A_ w);
3975
3976 if (w->interval < MIN_STAT_INTERVAL && w->interval)
3977 w->interval = MIN_STAT_INTERVAL;
3978
3979 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
3980 ev_set_priority (&w->timer, ev_priority (w));
3981
3982#if EV_USE_INOTIFY
3983 infy_init (EV_A);
3984
3985 if (fs_fd >= 0)
3986 infy_add (EV_A_ w);
703 else 3987 else
3988#endif
3989 {
3990 ev_timer_again (EV_A_ &w->timer);
3991 ev_unref (EV_A);
704 { 3992 }
705 now_floor = now; 3993
706 ev_now = ev_time (); 3994 ev_start (EV_A_ (W)w, 1);
3995
3996 EV_FREQUENT_CHECK;
3997}
3998
3999void
4000ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
4001{
4002 clear_pending (EV_A_ (W)w);
4003 if (expect_false (!ev_is_active (w)))
707 return 1; 4004 return;
4005
4006 EV_FREQUENT_CHECK;
4007
4008#if EV_USE_INOTIFY
4009 infy_del (EV_A_ w);
4010#endif
4011
4012 if (ev_is_active (&w->timer))
708 } 4013 {
4014 ev_ref (EV_A);
4015 ev_timer_stop (EV_A_ &w->timer);
4016 }
4017
4018 ev_stop (EV_A_ (W)w);
4019
4020 EV_FREQUENT_CHECK;
4021}
4022#endif
4023
4024#if EV_IDLE_ENABLE
4025void
4026ev_idle_start (EV_P_ ev_idle *w) EV_THROW
4027{
4028 if (expect_false (ev_is_active (w)))
4029 return;
4030
4031 pri_adjust (EV_A_ (W)w);
4032
4033 EV_FREQUENT_CHECK;
4034
4035 {
4036 int active = ++idlecnt [ABSPRI (w)];
4037
4038 ++idleall;
4039 ev_start (EV_A_ (W)w, active);
4040
4041 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
4042 idles [ABSPRI (w)][active - 1] = w;
4043 }
4044
4045 EV_FREQUENT_CHECK;
4046}
4047
4048void
4049ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
4050{
4051 clear_pending (EV_A_ (W)w);
4052 if (expect_false (!ev_is_active (w)))
4053 return;
4054
4055 EV_FREQUENT_CHECK;
4056
4057 {
4058 int active = ev_active (w);
4059
4060 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
4061 ev_active (idles [ABSPRI (w)][active - 1]) = active;
4062
4063 ev_stop (EV_A_ (W)w);
4064 --idleall;
4065 }
4066
4067 EV_FREQUENT_CHECK;
4068}
4069#endif
4070
4071#if EV_PREPARE_ENABLE
4072void
4073ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
4074{
4075 if (expect_false (ev_is_active (w)))
4076 return;
4077
4078 EV_FREQUENT_CHECK;
4079
4080 ev_start (EV_A_ (W)w, ++preparecnt);
4081 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
4082 prepares [preparecnt - 1] = w;
4083
4084 EV_FREQUENT_CHECK;
4085}
4086
4087void
4088ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
4089{
4090 clear_pending (EV_A_ (W)w);
4091 if (expect_false (!ev_is_active (w)))
4092 return;
4093
4094 EV_FREQUENT_CHECK;
4095
4096 {
4097 int active = ev_active (w);
4098
4099 prepares [active - 1] = prepares [--preparecnt];
4100 ev_active (prepares [active - 1]) = active;
4101 }
4102
4103 ev_stop (EV_A_ (W)w);
4104
4105 EV_FREQUENT_CHECK;
4106}
4107#endif
4108
4109#if EV_CHECK_ENABLE
4110void
4111ev_check_start (EV_P_ ev_check *w) EV_THROW
4112{
4113 if (expect_false (ev_is_active (w)))
4114 return;
4115
4116 EV_FREQUENT_CHECK;
4117
4118 ev_start (EV_A_ (W)w, ++checkcnt);
4119 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
4120 checks [checkcnt - 1] = w;
4121
4122 EV_FREQUENT_CHECK;
4123}
4124
4125void
4126ev_check_stop (EV_P_ ev_check *w) EV_THROW
4127{
4128 clear_pending (EV_A_ (W)w);
4129 if (expect_false (!ev_is_active (w)))
4130 return;
4131
4132 EV_FREQUENT_CHECK;
4133
4134 {
4135 int active = ev_active (w);
4136
4137 checks [active - 1] = checks [--checkcnt];
4138 ev_active (checks [active - 1]) = active;
4139 }
4140
4141 ev_stop (EV_A_ (W)w);
4142
4143 EV_FREQUENT_CHECK;
4144}
4145#endif
4146
4147#if EV_EMBED_ENABLE
4148void noinline
4149ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
4150{
4151 ev_run (w->other, EVRUN_NOWAIT);
709} 4152}
710 4153
711static void 4154static void
712time_update (void) 4155embed_io_cb (EV_P_ ev_io *io, int revents)
713{ 4156{
714 int i; 4157 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
715 4158
716#if EV_USE_MONOTONIC 4159 if (ev_cb (w))
717 if (expect_true (have_monotonic)) 4160 ev_feed_event (EV_A_ (W)w, EV_EMBED);
718 {
719 if (time_update_monotonic ())
720 {
721 ev_tstamp odiff = diff;
722
723 for (i = 4; --i; ) /* loop a few times, before making important decisions */
724 {
725 diff = ev_now - now;
726
727 if (fabs (odiff - diff) < MIN_TIMEJUMP)
728 return; /* all is well */
729
730 ev_now = ev_time ();
731 now = get_clock ();
732 now_floor = now;
733 }
734
735 periodics_reschedule (diff - odiff);
736 /* no timer adjustment, as the monotonic clock doesn't jump */
737 }
738 }
739 else 4161 else
740#endif 4162 ev_run (w->other, EVRUN_NOWAIT);
4163}
4164
4165static void
4166embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
4167{
4168 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
4169
741 { 4170 {
742 ev_now = ev_time (); 4171 EV_P = w->other;
743 4172
744 if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)) 4173 while (fdchangecnt)
745 { 4174 {
746 periodics_reschedule (ev_now - now); 4175 fd_reify (EV_A);
747 4176 ev_run (EV_A_ EVRUN_NOWAIT);
748 /* adjust timers. this is easy, as the offset is the same for all */
749 for (i = 0; i < timercnt; ++i)
750 timers [i]->at += diff;
751 } 4177 }
752
753 now = ev_now;
754 } 4178 }
755} 4179}
756 4180
757int ev_loop_done; 4181static void
758 4182embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
759void ev_loop (int flags)
760{ 4183{
761 double block; 4184 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
762 ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
763 4185
764 do 4186 ev_embed_stop (EV_A_ w);
4187
765 { 4188 {
766 /* queue check watchers (and execute them) */ 4189 EV_P = w->other;
767 if (expect_false (preparecnt))
768 {
769 queue_events ((W *)prepares, preparecnt, EV_PREPARE);
770 call_pending ();
771 }
772 4190
773 /* update fd-related kernel structures */ 4191 ev_loop_fork (EV_A);
774 fd_reify (); 4192 ev_run (EV_A_ EVRUN_NOWAIT);
775
776 /* calculate blocking time */
777
778 /* we only need this for !monotonic clockor timers, but as we basically
779 always have timers, we just calculate it always */
780#if EV_USE_MONOTONIC
781 if (expect_true (have_monotonic))
782 time_update_monotonic ();
783 else
784#endif
785 {
786 ev_now = ev_time ();
787 now = ev_now;
788 }
789
790 if (flags & EVLOOP_NONBLOCK || idlecnt)
791 block = 0.;
792 else
793 {
794 block = MAX_BLOCKTIME;
795
796 if (timercnt)
797 {
798 ev_tstamp to = timers [0]->at - now + method_fudge;
799 if (block > to) block = to;
800 }
801
802 if (periodiccnt)
803 {
804 ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
805 if (block > to) block = to;
806 }
807
808 if (block < 0.) block = 0.;
809 }
810
811 method_poll (block);
812
813 /* update ev_now, do magic */
814 time_update ();
815
816 /* queue pending timers and reschedule them */
817 timers_reify (); /* relative timers called last */
818 periodics_reify (); /* absolute timers called first */
819
820 /* queue idle watchers unless io or timers are pending */
821 if (!pendingcnt)
822 queue_events ((W *)idles, idlecnt, EV_IDLE);
823
824 /* queue check watchers, to be executed first */
825 if (checkcnt)
826 queue_events ((W *)checks, checkcnt, EV_CHECK);
827
828 call_pending ();
829 } 4193 }
830 while (!ev_loop_done);
831 4194
832 if (ev_loop_done != 2) 4195 ev_embed_start (EV_A_ w);
833 ev_loop_done = 0;
834} 4196}
4197
4198#if 0
4199static void
4200embed_idle_cb (EV_P_ ev_idle *idle, int revents)
4201{
4202 ev_idle_stop (EV_A_ idle);
4203}
4204#endif
4205
4206void
4207ev_embed_start (EV_P_ ev_embed *w) EV_THROW
4208{
4209 if (expect_false (ev_is_active (w)))
4210 return;
4211
4212 {
4213 EV_P = w->other;
4214 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
4215 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
4216 }
4217
4218 EV_FREQUENT_CHECK;
4219
4220 ev_set_priority (&w->io, ev_priority (w));
4221 ev_io_start (EV_A_ &w->io);
4222
4223 ev_prepare_init (&w->prepare, embed_prepare_cb);
4224 ev_set_priority (&w->prepare, EV_MINPRI);
4225 ev_prepare_start (EV_A_ &w->prepare);
4226
4227 ev_fork_init (&w->fork, embed_fork_cb);
4228 ev_fork_start (EV_A_ &w->fork);
4229
4230 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
4231
4232 ev_start (EV_A_ (W)w, 1);
4233
4234 EV_FREQUENT_CHECK;
4235}
4236
4237void
4238ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
4239{
4240 clear_pending (EV_A_ (W)w);
4241 if (expect_false (!ev_is_active (w)))
4242 return;
4243
4244 EV_FREQUENT_CHECK;
4245
4246 ev_io_stop (EV_A_ &w->io);
4247 ev_prepare_stop (EV_A_ &w->prepare);
4248 ev_fork_stop (EV_A_ &w->fork);
4249
4250 ev_stop (EV_A_ (W)w);
4251
4252 EV_FREQUENT_CHECK;
4253}
4254#endif
4255
4256#if EV_FORK_ENABLE
4257void
4258ev_fork_start (EV_P_ ev_fork *w) EV_THROW
4259{
4260 if (expect_false (ev_is_active (w)))
4261 return;
4262
4263 EV_FREQUENT_CHECK;
4264
4265 ev_start (EV_A_ (W)w, ++forkcnt);
4266 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
4267 forks [forkcnt - 1] = w;
4268
4269 EV_FREQUENT_CHECK;
4270}
4271
4272void
4273ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
4274{
4275 clear_pending (EV_A_ (W)w);
4276 if (expect_false (!ev_is_active (w)))
4277 return;
4278
4279 EV_FREQUENT_CHECK;
4280
4281 {
4282 int active = ev_active (w);
4283
4284 forks [active - 1] = forks [--forkcnt];
4285 ev_active (forks [active - 1]) = active;
4286 }
4287
4288 ev_stop (EV_A_ (W)w);
4289
4290 EV_FREQUENT_CHECK;
4291}
4292#endif
4293
4294#if EV_CLEANUP_ENABLE
4295void
4296ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4297{
4298 if (expect_false (ev_is_active (w)))
4299 return;
4300
4301 EV_FREQUENT_CHECK;
4302
4303 ev_start (EV_A_ (W)w, ++cleanupcnt);
4304 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4305 cleanups [cleanupcnt - 1] = w;
4306
4307 /* cleanup watchers should never keep a refcount on the loop */
4308 ev_unref (EV_A);
4309 EV_FREQUENT_CHECK;
4310}
4311
4312void
4313ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4314{
4315 clear_pending (EV_A_ (W)w);
4316 if (expect_false (!ev_is_active (w)))
4317 return;
4318
4319 EV_FREQUENT_CHECK;
4320 ev_ref (EV_A);
4321
4322 {
4323 int active = ev_active (w);
4324
4325 cleanups [active - 1] = cleanups [--cleanupcnt];
4326 ev_active (cleanups [active - 1]) = active;
4327 }
4328
4329 ev_stop (EV_A_ (W)w);
4330
4331 EV_FREQUENT_CHECK;
4332}
4333#endif
4334
4335#if EV_ASYNC_ENABLE
4336void
4337ev_async_start (EV_P_ ev_async *w) EV_THROW
4338{
4339 if (expect_false (ev_is_active (w)))
4340 return;
4341
4342 w->sent = 0;
4343
4344 evpipe_init (EV_A);
4345
4346 EV_FREQUENT_CHECK;
4347
4348 ev_start (EV_A_ (W)w, ++asynccnt);
4349 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
4350 asyncs [asynccnt - 1] = w;
4351
4352 EV_FREQUENT_CHECK;
4353}
4354
4355void
4356ev_async_stop (EV_P_ ev_async *w) EV_THROW
4357{
4358 clear_pending (EV_A_ (W)w);
4359 if (expect_false (!ev_is_active (w)))
4360 return;
4361
4362 EV_FREQUENT_CHECK;
4363
4364 {
4365 int active = ev_active (w);
4366
4367 asyncs [active - 1] = asyncs [--asynccnt];
4368 ev_active (asyncs [active - 1]) = active;
4369 }
4370
4371 ev_stop (EV_A_ (W)w);
4372
4373 EV_FREQUENT_CHECK;
4374}
4375
4376void
4377ev_async_send (EV_P_ ev_async *w) EV_THROW
4378{
4379 w->sent = 1;
4380 evpipe_write (EV_A_ &async_pending);
4381}
4382#endif
835 4383
836/*****************************************************************************/ 4384/*****************************************************************************/
837 4385
838static void
839wlist_add (WL *head, WL elem)
840{
841 elem->next = *head;
842 *head = elem;
843}
844
845static void
846wlist_del (WL *head, WL elem)
847{
848 while (*head)
849 {
850 if (*head == elem)
851 {
852 *head = elem->next;
853 return;
854 }
855
856 head = &(*head)->next;
857 }
858}
859
860static void
861ev_clear_pending (W w)
862{
863 if (w->pending)
864 {
865 pendings [ABSPRI (w)][w->pending - 1].w = 0;
866 w->pending = 0;
867 }
868}
869
870static void
871ev_start (W w, int active)
872{
873 if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
874 if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
875
876 w->active = active;
877}
878
879static void
880ev_stop (W w)
881{
882 w->active = 0;
883}
884
885/*****************************************************************************/
886
887void
888ev_io_start (struct ev_io *w)
889{
890 int fd = w->fd;
891
892 if (ev_is_active (w))
893 return;
894
895 assert (("ev_io_start called with negative fd", fd >= 0));
896
897 ev_start ((W)w, 1);
898 array_needsize (anfds, anfdmax, fd + 1, anfds_init);
899 wlist_add ((WL *)&anfds[fd].head, (WL)w);
900
901 fd_change (fd);
902}
903
904void
905ev_io_stop (struct ev_io *w)
906{
907 ev_clear_pending ((W)w);
908 if (!ev_is_active (w))
909 return;
910
911 wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
912 ev_stop ((W)w);
913
914 fd_change (w->fd);
915}
916
917void
918ev_timer_start (struct ev_timer *w)
919{
920 if (ev_is_active (w))
921 return;
922
923 w->at += now;
924
925 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
926
927 ev_start ((W)w, ++timercnt);
928 array_needsize (timers, timermax, timercnt, );
929 timers [timercnt - 1] = w;
930 upheap ((WT *)timers, timercnt - 1);
931}
932
933void
934ev_timer_stop (struct ev_timer *w)
935{
936 ev_clear_pending ((W)w);
937 if (!ev_is_active (w))
938 return;
939
940 if (w->active < timercnt--)
941 {
942 timers [w->active - 1] = timers [timercnt];
943 downheap ((WT *)timers, timercnt, w->active - 1);
944 }
945
946 w->at = w->repeat;
947
948 ev_stop ((W)w);
949}
950
951void
952ev_timer_again (struct ev_timer *w)
953{
954 if (ev_is_active (w))
955 {
956 if (w->repeat)
957 {
958 w->at = now + w->repeat;
959 downheap ((WT *)timers, timercnt, w->active - 1);
960 }
961 else
962 ev_timer_stop (w);
963 }
964 else if (w->repeat)
965 ev_timer_start (w);
966}
967
968void
969ev_periodic_start (struct ev_periodic *w)
970{
971 if (ev_is_active (w))
972 return;
973
974 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
975
976 /* this formula differs from the one in periodic_reify because we do not always round up */
977 if (w->interval)
978 w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
979
980 ev_start ((W)w, ++periodiccnt);
981 array_needsize (periodics, periodicmax, periodiccnt, );
982 periodics [periodiccnt - 1] = w;
983 upheap ((WT *)periodics, periodiccnt - 1);
984}
985
986void
987ev_periodic_stop (struct ev_periodic *w)
988{
989 ev_clear_pending ((W)w);
990 if (!ev_is_active (w))
991 return;
992
993 if (w->active < periodiccnt--)
994 {
995 periodics [w->active - 1] = periodics [periodiccnt];
996 downheap ((WT *)periodics, periodiccnt, w->active - 1);
997 }
998
999 ev_stop ((W)w);
1000}
1001
1002void
1003ev_signal_start (struct ev_signal *w)
1004{
1005 if (ev_is_active (w))
1006 return;
1007
1008 assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1009
1010 ev_start ((W)w, 1);
1011 array_needsize (signals, signalmax, w->signum, signals_init);
1012 wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1013
1014 if (!w->next)
1015 {
1016 struct sigaction sa;
1017 sa.sa_handler = sighandler;
1018 sigfillset (&sa.sa_mask);
1019 sa.sa_flags = 0;
1020 sigaction (w->signum, &sa, 0);
1021 }
1022}
1023
1024void
1025ev_signal_stop (struct ev_signal *w)
1026{
1027 ev_clear_pending ((W)w);
1028 if (!ev_is_active (w))
1029 return;
1030
1031 wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1032 ev_stop ((W)w);
1033
1034 if (!signals [w->signum - 1].head)
1035 signal (w->signum, SIG_DFL);
1036}
1037
1038void
1039ev_idle_start (struct ev_idle *w)
1040{
1041 if (ev_is_active (w))
1042 return;
1043
1044 ev_start ((W)w, ++idlecnt);
1045 array_needsize (idles, idlemax, idlecnt, );
1046 idles [idlecnt - 1] = w;
1047}
1048
1049void
1050ev_idle_stop (struct ev_idle *w)
1051{
1052 ev_clear_pending ((W)w);
1053 if (ev_is_active (w))
1054 return;
1055
1056 idles [w->active - 1] = idles [--idlecnt];
1057 ev_stop ((W)w);
1058}
1059
1060void
1061ev_prepare_start (struct ev_prepare *w)
1062{
1063 if (ev_is_active (w))
1064 return;
1065
1066 ev_start ((W)w, ++preparecnt);
1067 array_needsize (prepares, preparemax, preparecnt, );
1068 prepares [preparecnt - 1] = w;
1069}
1070
1071void
1072ev_prepare_stop (struct ev_prepare *w)
1073{
1074 ev_clear_pending ((W)w);
1075 if (ev_is_active (w))
1076 return;
1077
1078 prepares [w->active - 1] = prepares [--preparecnt];
1079 ev_stop ((W)w);
1080}
1081
1082void
1083ev_check_start (struct ev_check *w)
1084{
1085 if (ev_is_active (w))
1086 return;
1087
1088 ev_start ((W)w, ++checkcnt);
1089 array_needsize (checks, checkmax, checkcnt, );
1090 checks [checkcnt - 1] = w;
1091}
1092
1093void
1094ev_check_stop (struct ev_check *w)
1095{
1096 ev_clear_pending ((W)w);
1097 if (ev_is_active (w))
1098 return;
1099
1100 checks [w->active - 1] = checks [--checkcnt];
1101 ev_stop ((W)w);
1102}
1103
1104void
1105ev_child_start (struct ev_child *w)
1106{
1107 if (ev_is_active (w))
1108 return;
1109
1110 ev_start ((W)w, 1);
1111 wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1112}
1113
1114void
1115ev_child_stop (struct ev_child *w)
1116{
1117 ev_clear_pending ((W)w);
1118 if (ev_is_active (w))
1119 return;
1120
1121 wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1122 ev_stop ((W)w);
1123}
1124
1125/*****************************************************************************/
1126
1127struct ev_once 4386struct ev_once
1128{ 4387{
1129 struct ev_io io; 4388 ev_io io;
1130 struct ev_timer to; 4389 ev_timer to;
1131 void (*cb)(int revents, void *arg); 4390 void (*cb)(int revents, void *arg);
1132 void *arg; 4391 void *arg;
1133}; 4392};
1134 4393
1135static void 4394static void
1136once_cb (struct ev_once *once, int revents) 4395once_cb (EV_P_ struct ev_once *once, int revents)
1137{ 4396{
1138 void (*cb)(int revents, void *arg) = once->cb; 4397 void (*cb)(int revents, void *arg) = once->cb;
1139 void *arg = once->arg; 4398 void *arg = once->arg;
1140 4399
1141 ev_io_stop (&once->io); 4400 ev_io_stop (EV_A_ &once->io);
1142 ev_timer_stop (&once->to); 4401 ev_timer_stop (EV_A_ &once->to);
1143 free (once); 4402 ev_free (once);
1144 4403
1145 cb (revents, arg); 4404 cb (revents, arg);
1146} 4405}
1147 4406
1148static void 4407static void
1149once_cb_io (struct ev_io *w, int revents) 4408once_cb_io (EV_P_ ev_io *w, int revents)
1150{ 4409{
1151 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4410 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4411
4412 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
1152} 4413}
1153 4414
1154static void 4415static void
1155once_cb_to (struct ev_timer *w, int revents) 4416once_cb_to (EV_P_ ev_timer *w, int revents)
1156{ 4417{
1157 once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4418 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4419
4420 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
1158} 4421}
1159 4422
1160void 4423void
1161ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4424ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
1162{ 4425{
1163 struct ev_once *once = malloc (sizeof (struct ev_once)); 4426 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
1164 4427
1165 if (!once) 4428 if (expect_false (!once))
4429 {
1166 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4430 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
1167 else 4431 return;
1168 { 4432 }
4433
1169 once->cb = cb; 4434 once->cb = cb;
1170 once->arg = arg; 4435 once->arg = arg;
1171 4436
1172 ev_watcher_init (&once->io, once_cb_io); 4437 ev_init (&once->io, once_cb_io);
1173 if (fd >= 0) 4438 if (fd >= 0)
4439 {
4440 ev_io_set (&once->io, fd, events);
4441 ev_io_start (EV_A_ &once->io);
4442 }
4443
4444 ev_init (&once->to, once_cb_to);
4445 if (timeout >= 0.)
4446 {
4447 ev_timer_set (&once->to, timeout, 0.);
4448 ev_timer_start (EV_A_ &once->to);
4449 }
4450}
4451
4452/*****************************************************************************/
4453
4454#if EV_WALK_ENABLE
4455void ecb_cold
4456ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4457{
4458 int i, j;
4459 ev_watcher_list *wl, *wn;
4460
4461 if (types & (EV_IO | EV_EMBED))
4462 for (i = 0; i < anfdmax; ++i)
4463 for (wl = anfds [i].head; wl; )
1174 { 4464 {
1175 ev_io_set (&once->io, fd, events); 4465 wn = wl->next;
1176 ev_io_start (&once->io); 4466
4467#if EV_EMBED_ENABLE
4468 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4469 {
4470 if (types & EV_EMBED)
4471 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4472 }
4473 else
4474#endif
4475#if EV_USE_INOTIFY
4476 if (ev_cb ((ev_io *)wl) == infy_cb)
4477 ;
4478 else
4479#endif
4480 if ((ev_io *)wl != &pipe_w)
4481 if (types & EV_IO)
4482 cb (EV_A_ EV_IO, wl);
4483
4484 wl = wn;
1177 } 4485 }
1178 4486
1179 ev_watcher_init (&once->to, once_cb_to); 4487 if (types & (EV_TIMER | EV_STAT))
1180 if (timeout >= 0.) 4488 for (i = timercnt + HEAP0; i-- > HEAP0; )
4489#if EV_STAT_ENABLE
4490 /*TODO: timer is not always active*/
4491 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
1181 { 4492 {
1182 ev_timer_set (&once->to, timeout, 0.); 4493 if (types & EV_STAT)
1183 ev_timer_start (&once->to); 4494 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
1184 } 4495 }
1185 } 4496 else
1186} 4497#endif
4498 if (types & EV_TIMER)
4499 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
1187 4500
1188/*****************************************************************************/ 4501#if EV_PERIODIC_ENABLE
4502 if (types & EV_PERIODIC)
4503 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4504 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4505#endif
1189 4506
1190#if 0 4507#if EV_IDLE_ENABLE
4508 if (types & EV_IDLE)
4509 for (j = NUMPRI; j--; )
4510 for (i = idlecnt [j]; i--; )
4511 cb (EV_A_ EV_IDLE, idles [j][i]);
4512#endif
1191 4513
1192struct ev_io wio; 4514#if EV_FORK_ENABLE
4515 if (types & EV_FORK)
4516 for (i = forkcnt; i--; )
4517 if (ev_cb (forks [i]) != embed_fork_cb)
4518 cb (EV_A_ EV_FORK, forks [i]);
4519#endif
1193 4520
1194static void 4521#if EV_ASYNC_ENABLE
1195sin_cb (struct ev_io *w, int revents) 4522 if (types & EV_ASYNC)
1196{ 4523 for (i = asynccnt; i--; )
1197 fprintf (stderr, "sin %d, revents %d\n", w->fd, revents); 4524 cb (EV_A_ EV_ASYNC, asyncs [i]);
1198} 4525#endif
1199 4526
1200static void 4527#if EV_PREPARE_ENABLE
1201ocb (struct ev_timer *w, int revents) 4528 if (types & EV_PREPARE)
1202{ 4529 for (i = preparecnt; i--; )
1203 //fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data); 4530# if EV_EMBED_ENABLE
1204 ev_timer_stop (w); 4531 if (ev_cb (prepares [i]) != embed_prepare_cb)
1205 ev_timer_start (w);
1206}
1207
1208static void
1209scb (struct ev_signal *w, int revents)
1210{
1211 fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1212 ev_io_stop (&wio);
1213 ev_io_start (&wio);
1214}
1215
1216static void
1217gcb (struct ev_signal *w, int revents)
1218{
1219 fprintf (stderr, "generic %x\n", revents);
1220
1221}
1222
1223int main (void)
1224{
1225 ev_init (0);
1226
1227 ev_io_init (&wio, sin_cb, 0, EV_READ);
1228 ev_io_start (&wio);
1229
1230 struct ev_timer t[10000];
1231
1232#if 0
1233 int i;
1234 for (i = 0; i < 10000; ++i)
1235 {
1236 struct ev_timer *w = t + i;
1237 ev_watcher_init (w, ocb, i);
1238 ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1239 ev_timer_start (w);
1240 if (drand48 () < 0.5)
1241 ev_timer_stop (w);
1242 }
1243#endif 4532# endif
1244 4533 cb (EV_A_ EV_PREPARE, prepares [i]);
1245 struct ev_timer t1;
1246 ev_timer_init (&t1, ocb, 5, 10);
1247 ev_timer_start (&t1);
1248
1249 struct ev_signal sig;
1250 ev_signal_init (&sig, scb, SIGQUIT);
1251 ev_signal_start (&sig);
1252
1253 struct ev_check cw;
1254 ev_check_init (&cw, gcb);
1255 ev_check_start (&cw);
1256
1257 struct ev_idle iw;
1258 ev_idle_init (&iw, gcb);
1259 ev_idle_start (&iw);
1260
1261 ev_loop (0);
1262
1263 return 0;
1264}
1265
1266#endif 4534#endif
1267 4535
4536#if EV_CHECK_ENABLE
4537 if (types & EV_CHECK)
4538 for (i = checkcnt; i--; )
4539 cb (EV_A_ EV_CHECK, checks [i]);
4540#endif
1268 4541
4542#if EV_SIGNAL_ENABLE
4543 if (types & EV_SIGNAL)
4544 for (i = 0; i < EV_NSIG - 1; ++i)
4545 for (wl = signals [i].head; wl; )
4546 {
4547 wn = wl->next;
4548 cb (EV_A_ EV_SIGNAL, wl);
4549 wl = wn;
4550 }
4551#endif
1269 4552
4553#if EV_CHILD_ENABLE
4554 if (types & EV_CHILD)
4555 for (i = (EV_PID_HASHSIZE); i--; )
4556 for (wl = childs [i]; wl; )
4557 {
4558 wn = wl->next;
4559 cb (EV_A_ EV_CHILD, wl);
4560 wl = wn;
4561 }
4562#endif
4563/* EV_STAT 0x00001000 /* stat data changed */
4564/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4565}
4566#endif
1270 4567
4568#if EV_MULTIPLICITY
4569 #include "ev_wrap.h"
4570#endif
4571

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