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Comparing libev/ev.c (file contents):
Revision 1.261 by root, Mon Sep 29 03:31:14 2008 UTC vs.
Revision 1.477 by root, Sun Aug 9 00:13:28 2015 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2012,2013 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 modifica- 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * tion, are permitted provided that the following conditions are met: 8 * tion, are permitted provided that the following conditions are met:
9 * 9 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
35 * and other provisions required by the GPL. If you do not delete the 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 36 * provisions above, a recipient may use your version of this file under
37 * either the BSD or the GPL. 37 * either the BSD or the GPL.
38 */ 38 */
39 39
40#ifdef __cplusplus
41extern "C" {
42#endif
43
44/* this big block deduces configuration from config.h */ 40/* this big block deduces configuration from config.h */
45#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
46# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
47# include EV_CONFIG_H 43# include EV_CONFIG_H
48# else 44# else
49# include "config.h" 45# include "config.h"
50# endif 46# endif
51 47
48# if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52# endif
53
54# if HAVE_CLOCK_SYSCALL
55# ifndef EV_USE_CLOCK_SYSCALL
56# define EV_USE_CLOCK_SYSCALL 1
57# ifndef EV_USE_REALTIME
58# define EV_USE_REALTIME 0
59# endif
60# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 1
62# endif
63# endif
64# elif !defined EV_USE_CLOCK_SYSCALL
65# define EV_USE_CLOCK_SYSCALL 0
66# endif
67
52# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
53# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
54# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
55# endif 71# endif
56# ifndef EV_USE_REALTIME 72# ifndef EV_USE_REALTIME
57# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
58# endif 74# endif
59# else 75# else
60# ifndef EV_USE_MONOTONIC 76# ifndef EV_USE_MONOTONIC
61# define EV_USE_MONOTONIC 0 77# define EV_USE_MONOTONIC 0
62# endif 78# endif
63# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
64# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
65# endif 81# endif
66# endif 82# endif
67 83
84# if HAVE_NANOSLEEP
68# ifndef EV_USE_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
69# if HAVE_NANOSLEEP
70# define EV_USE_NANOSLEEP 1 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
71# else 88# else
89# undef EV_USE_NANOSLEEP
72# define EV_USE_NANOSLEEP 0 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
73# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
74# endif 100# endif
75 101
102# if HAVE_POLL && HAVE_POLL_H
76# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
77# if HAVE_SELECT && HAVE_SYS_SELECT_H 104# define EV_USE_POLL EV_FEATURE_BACKENDS
78# define EV_USE_SELECT 1
79# else
80# define EV_USE_SELECT 0
81# endif 105# endif
82# endif
83
84# ifndef EV_USE_POLL
85# if HAVE_POLL && HAVE_POLL_H
86# define EV_USE_POLL 1
87# else 106# else
107# undef EV_USE_POLL
88# define EV_USE_POLL 0 108# define EV_USE_POLL 0
89# endif
90# endif 109# endif
91 110
92# ifndef EV_USE_EPOLL
93# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
94# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
95# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
96# define EV_USE_EPOLL 0
97# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
98# endif 118# endif
99 119
120# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
100# ifndef EV_USE_KQUEUE 121# ifndef EV_USE_KQUEUE
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 122# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
102# define EV_USE_KQUEUE 1
103# else
104# define EV_USE_KQUEUE 0
105# endif 123# endif
124# else
125# undef EV_USE_KQUEUE
126# define EV_USE_KQUEUE 0
106# endif 127# endif
107 128
108# ifndef EV_USE_PORT
109# if HAVE_PORT_H && HAVE_PORT_CREATE 129# if HAVE_PORT_H && HAVE_PORT_CREATE
110# define EV_USE_PORT 1 130# ifndef EV_USE_PORT
111# else 131# define EV_USE_PORT EV_FEATURE_BACKENDS
112# define EV_USE_PORT 0
113# endif 132# endif
133# else
134# undef EV_USE_PORT
135# define EV_USE_PORT 0
114# endif 136# endif
115 137
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 138# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1 139# ifndef EV_USE_INOTIFY
119# else
120# define EV_USE_INOTIFY 0 140# define EV_USE_INOTIFY EV_FEATURE_OS
121# endif 141# endif
142# else
143# undef EV_USE_INOTIFY
144# define EV_USE_INOTIFY 0
122# endif 145# endif
123 146
147# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
124# ifndef EV_USE_EVENTFD 148# ifndef EV_USE_SIGNALFD
125# if HAVE_EVENTFD 149# define EV_USE_SIGNALFD EV_FEATURE_OS
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0
129# endif 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
130# endif 163# endif
131 164
132#endif 165#endif
133 166
134#include <math.h>
135#include <stdlib.h> 167#include <stdlib.h>
168#include <string.h>
136#include <fcntl.h> 169#include <fcntl.h>
137#include <stddef.h> 170#include <stddef.h>
138 171
139#include <stdio.h> 172#include <stdio.h>
140 173
141#include <assert.h> 174#include <assert.h>
142#include <errno.h> 175#include <errno.h>
143#include <sys/types.h> 176#include <sys/types.h>
144#include <time.h> 177#include <time.h>
178#include <limits.h>
145 179
146#include <signal.h> 180#include <signal.h>
147 181
148#ifdef EV_H 182#ifdef EV_H
149# include EV_H 183# include EV_H
150#else 184#else
151# include "ev.h" 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
152#endif 197#endif
153 198
154#ifndef _WIN32 199#ifndef _WIN32
155# include <sys/time.h> 200# include <sys/time.h>
156# include <sys/wait.h> 201# include <sys/wait.h>
157# include <unistd.h> 202# include <unistd.h>
158#else 203#else
159# include <io.h> 204# include <io.h>
160# define WIN32_LEAN_AND_MEAN 205# define WIN32_LEAN_AND_MEAN
206# include <winsock2.h>
161# include <windows.h> 207# include <windows.h>
162# ifndef EV_SELECT_IS_WINSOCKET 208# ifndef EV_SELECT_IS_WINSOCKET
163# define EV_SELECT_IS_WINSOCKET 1 209# define EV_SELECT_IS_WINSOCKET 1
164# endif 210# endif
211# undef EV_AVOID_STDIO
165#endif 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
166 221
167/* this block tries to deduce configuration from header-defined symbols and defaults */ 222/* this block tries to deduce configuration from header-defined symbols and defaults */
168 223
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# define EV_NSIG (8 * sizeof (sigset_t) + 1)
247#endif
248
249#ifndef EV_USE_FLOOR
250# define EV_USE_FLOOR 0
251#endif
252
253#ifndef EV_USE_CLOCK_SYSCALL
254# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
255# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
256# else
257# define EV_USE_CLOCK_SYSCALL 0
258# endif
259#endif
260
261#if !(_POSIX_TIMERS > 0)
262# ifndef EV_USE_MONOTONIC
263# define EV_USE_MONOTONIC 0
264# endif
265# ifndef EV_USE_REALTIME
266# define EV_USE_REALTIME 0
267# endif
268#endif
269
169#ifndef EV_USE_MONOTONIC 270#ifndef EV_USE_MONOTONIC
170# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 271# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
171# define EV_USE_MONOTONIC 1 272# define EV_USE_MONOTONIC EV_FEATURE_OS
172# else 273# else
173# define EV_USE_MONOTONIC 0 274# define EV_USE_MONOTONIC 0
174# endif 275# endif
175#endif 276#endif
176 277
177#ifndef EV_USE_REALTIME 278#ifndef EV_USE_REALTIME
178# define EV_USE_REALTIME 0 279# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
179#endif 280#endif
180 281
181#ifndef EV_USE_NANOSLEEP 282#ifndef EV_USE_NANOSLEEP
182# if _POSIX_C_SOURCE >= 199309L 283# if _POSIX_C_SOURCE >= 199309L
183# define EV_USE_NANOSLEEP 1 284# define EV_USE_NANOSLEEP EV_FEATURE_OS
184# else 285# else
185# define EV_USE_NANOSLEEP 0 286# define EV_USE_NANOSLEEP 0
186# endif 287# endif
187#endif 288#endif
188 289
189#ifndef EV_USE_SELECT 290#ifndef EV_USE_SELECT
190# define EV_USE_SELECT 1 291# define EV_USE_SELECT EV_FEATURE_BACKENDS
191#endif 292#endif
192 293
193#ifndef EV_USE_POLL 294#ifndef EV_USE_POLL
194# ifdef _WIN32 295# ifdef _WIN32
195# define EV_USE_POLL 0 296# define EV_USE_POLL 0
196# else 297# else
197# define EV_USE_POLL 1 298# define EV_USE_POLL EV_FEATURE_BACKENDS
198# endif 299# endif
199#endif 300#endif
200 301
201#ifndef EV_USE_EPOLL 302#ifndef EV_USE_EPOLL
202# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 303# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
203# define EV_USE_EPOLL 1 304# define EV_USE_EPOLL EV_FEATURE_BACKENDS
204# else 305# else
205# define EV_USE_EPOLL 0 306# define EV_USE_EPOLL 0
206# endif 307# endif
207#endif 308#endif
208 309
… …
214# define EV_USE_PORT 0 315# define EV_USE_PORT 0
215#endif 316#endif
216 317
217#ifndef EV_USE_INOTIFY 318#ifndef EV_USE_INOTIFY
218# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 319# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
219# define EV_USE_INOTIFY 1 320# define EV_USE_INOTIFY EV_FEATURE_OS
220# else 321# else
221# define EV_USE_INOTIFY 0 322# define EV_USE_INOTIFY 0
222# endif 323# endif
223#endif 324#endif
224 325
225#ifndef EV_PID_HASHSIZE 326#ifndef EV_PID_HASHSIZE
226# if EV_MINIMAL 327# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
227# define EV_PID_HASHSIZE 1
228# else
229# define EV_PID_HASHSIZE 16
230# endif
231#endif 328#endif
232 329
233#ifndef EV_INOTIFY_HASHSIZE 330#ifndef EV_INOTIFY_HASHSIZE
234# if EV_MINIMAL 331# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
235# define EV_INOTIFY_HASHSIZE 1
236# else
237# define EV_INOTIFY_HASHSIZE 16
238# endif
239#endif 332#endif
240 333
241#ifndef EV_USE_EVENTFD 334#ifndef EV_USE_EVENTFD
242# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 335# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
243# define EV_USE_EVENTFD 1 336# define EV_USE_EVENTFD EV_FEATURE_OS
244# else 337# else
245# define EV_USE_EVENTFD 0 338# define EV_USE_EVENTFD 0
339# endif
340#endif
341
342#ifndef EV_USE_SIGNALFD
343# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
344# define EV_USE_SIGNALFD EV_FEATURE_OS
345# else
346# define EV_USE_SIGNALFD 0
246# endif 347# endif
247#endif 348#endif
248 349
249#if 0 /* debugging */ 350#if 0 /* debugging */
250# define EV_VERIFY 3 351# define EV_VERIFY 3
251# define EV_USE_4HEAP 1 352# define EV_USE_4HEAP 1
252# define EV_HEAP_CACHE_AT 1 353# define EV_HEAP_CACHE_AT 1
253#endif 354#endif
254 355
255#ifndef EV_VERIFY 356#ifndef EV_VERIFY
256# define EV_VERIFY !EV_MINIMAL 357# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
257#endif 358#endif
258 359
259#ifndef EV_USE_4HEAP 360#ifndef EV_USE_4HEAP
260# define EV_USE_4HEAP !EV_MINIMAL 361# define EV_USE_4HEAP EV_FEATURE_DATA
261#endif 362#endif
262 363
263#ifndef EV_HEAP_CACHE_AT 364#ifndef EV_HEAP_CACHE_AT
264# define EV_HEAP_CACHE_AT !EV_MINIMAL 365# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
366#endif
367
368#ifdef ANDROID
369/* supposedly, android doesn't typedef fd_mask */
370# undef EV_USE_SELECT
371# define EV_USE_SELECT 0
372/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
373# undef EV_USE_CLOCK_SYSCALL
374# define EV_USE_CLOCK_SYSCALL 0
375#endif
376
377/* aix's poll.h seems to cause lots of trouble */
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
383
384/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
385/* which makes programs even slower. might work on other unices, too. */
386#if EV_USE_CLOCK_SYSCALL
387# include <sys/syscall.h>
388# ifdef SYS_clock_gettime
389# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
390# undef EV_USE_MONOTONIC
391# define EV_USE_MONOTONIC 1
392# else
393# undef EV_USE_CLOCK_SYSCALL
394# define EV_USE_CLOCK_SYSCALL 0
395# endif
265#endif 396#endif
266 397
267/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 398/* this block fixes any misconfiguration where we know we run into trouble otherwise */
268 399
269#ifndef CLOCK_MONOTONIC 400#ifndef CLOCK_MONOTONIC
… …
280# undef EV_USE_INOTIFY 411# undef EV_USE_INOTIFY
281# define EV_USE_INOTIFY 0 412# define EV_USE_INOTIFY 0
282#endif 413#endif
283 414
284#if !EV_USE_NANOSLEEP 415#if !EV_USE_NANOSLEEP
285# ifndef _WIN32 416/* hp-ux has it in sys/time.h, which we unconditionally include above */
417# if !defined _WIN32 && !defined __hpux
286# include <sys/select.h> 418# include <sys/select.h>
287# endif 419# endif
288#endif 420#endif
289 421
290#if EV_USE_INOTIFY 422#if EV_USE_INOTIFY
423# include <sys/statfs.h>
291# include <sys/inotify.h> 424# include <sys/inotify.h>
425/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
426# ifndef IN_DONT_FOLLOW
427# undef EV_USE_INOTIFY
428# define EV_USE_INOTIFY 0
292#endif 429# endif
293
294#if EV_SELECT_IS_WINSOCKET
295# include <winsock.h>
296#endif 430#endif
297 431
298#if EV_USE_EVENTFD 432#if EV_USE_EVENTFD
299/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 433/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
300# include <stdint.h> 434# include <stdint.h>
301# ifdef __cplusplus 435# ifndef EFD_NONBLOCK
302extern "C" { 436# define EFD_NONBLOCK O_NONBLOCK
303# endif 437# endif
304int eventfd (unsigned int initval, int flags); 438# ifndef EFD_CLOEXEC
305# ifdef __cplusplus 439# ifdef O_CLOEXEC
306} 440# define EFD_CLOEXEC O_CLOEXEC
441# else
442# define EFD_CLOEXEC 02000000
443# endif
307# endif 444# endif
445EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
446#endif
447
448#if EV_USE_SIGNALFD
449/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
450# include <stdint.h>
451# ifndef SFD_NONBLOCK
452# define SFD_NONBLOCK O_NONBLOCK
453# endif
454# ifndef SFD_CLOEXEC
455# ifdef O_CLOEXEC
456# define SFD_CLOEXEC O_CLOEXEC
457# else
458# define SFD_CLOEXEC 02000000
459# endif
460# endif
461EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
462
463struct signalfd_siginfo
464{
465 uint32_t ssi_signo;
466 char pad[128 - sizeof (uint32_t)];
467};
308#endif 468#endif
309 469
310/**/ 470/**/
311 471
312#if EV_VERIFY >= 3 472#if EV_VERIFY >= 3
313# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 473# define EV_FREQUENT_CHECK ev_verify (EV_A)
314#else 474#else
315# define EV_FREQUENT_CHECK do { } while (0) 475# define EV_FREQUENT_CHECK do { } while (0)
316#endif 476#endif
317 477
318/* 478/*
319 * This is used to avoid floating point rounding problems. 479 * This is used to work around floating point rounding problems.
320 * It is added to ev_rt_now when scheduling periodics
321 * to ensure progress, time-wise, even when rounding
322 * errors are against us.
323 * This value is good at least till the year 4000. 480 * This value is good at least till the year 4000.
324 * Better solutions welcome.
325 */ 481 */
326#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 482#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
483/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
327 484
328#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 485#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
329#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 486#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
330/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
331 487
488#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
489#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
490
491/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
492/* ECB.H BEGIN */
493/*
494 * libecb - http://software.schmorp.de/pkg/libecb
495 *
496 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
497 * Copyright (©) 2011 Emanuele Giaquinta
498 * All rights reserved.
499 *
500 * Redistribution and use in source and binary forms, with or without modifica-
501 * tion, are permitted provided that the following conditions are met:
502 *
503 * 1. Redistributions of source code must retain the above copyright notice,
504 * this list of conditions and the following disclaimer.
505 *
506 * 2. Redistributions in binary form must reproduce the above copyright
507 * notice, this list of conditions and the following disclaimer in the
508 * documentation and/or other materials provided with the distribution.
509 *
510 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
511 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
512 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
513 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
514 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
515 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
516 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
517 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
518 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
519 * OF THE POSSIBILITY OF SUCH DAMAGE.
520 *
521 * Alternatively, the contents of this file may be used under the terms of
522 * the GNU General Public License ("GPL") version 2 or any later version,
523 * in which case the provisions of the GPL are applicable instead of
524 * the above. If you wish to allow the use of your version of this file
525 * only under the terms of the GPL and not to allow others to use your
526 * version of this file under the BSD license, indicate your decision
527 * by deleting the provisions above and replace them with the notice
528 * and other provisions required by the GPL. If you do not delete the
529 * provisions above, a recipient may use your version of this file under
530 * either the BSD or the GPL.
531 */
532
533#ifndef ECB_H
534#define ECB_H
535
536/* 16 bits major, 16 bits minor */
537#define ECB_VERSION 0x00010004
538
539#ifdef _WIN32
540 typedef signed char int8_t;
541 typedef unsigned char uint8_t;
542 typedef signed short int16_t;
543 typedef unsigned short uint16_t;
544 typedef signed int int32_t;
545 typedef unsigned int uint32_t;
332#if __GNUC__ >= 4 546 #if __GNUC__
333# define expect(expr,value) __builtin_expect ((expr),(value)) 547 typedef signed long long int64_t;
334# define noinline __attribute__ ((noinline)) 548 typedef unsigned long long uint64_t;
549 #else /* _MSC_VER || __BORLANDC__ */
550 typedef signed __int64 int64_t;
551 typedef unsigned __int64 uint64_t;
552 #endif
553 #ifdef _WIN64
554 #define ECB_PTRSIZE 8
555 typedef uint64_t uintptr_t;
556 typedef int64_t intptr_t;
557 #else
558 #define ECB_PTRSIZE 4
559 typedef uint32_t uintptr_t;
560 typedef int32_t intptr_t;
561 #endif
335#else 562#else
336# define expect(expr,value) (expr) 563 #include <inttypes.h>
337# define noinline 564 #if UINTMAX_MAX > 0xffffffffU
338# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 565 #define ECB_PTRSIZE 8
339# define inline 566 #else
567 #define ECB_PTRSIZE 4
568 #endif
340# endif 569#endif
570
571#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
572#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
573
574/* work around x32 idiocy by defining proper macros */
575#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
576 #if _ILP32
577 #define ECB_AMD64_X32 1
578 #else
579 #define ECB_AMD64 1
341#endif 580 #endif
581#endif
342 582
583/* many compilers define _GNUC_ to some versions but then only implement
584 * what their idiot authors think are the "more important" extensions,
585 * causing enormous grief in return for some better fake benchmark numbers.
586 * or so.
587 * we try to detect these and simply assume they are not gcc - if they have
588 * an issue with that they should have done it right in the first place.
589 */
590#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
591 #define ECB_GCC_VERSION(major,minor) 0
592#else
593 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
594#endif
595
596#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
597
598#if __clang__ && defined __has_builtin
599 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
600#else
601 #define ECB_CLANG_BUILTIN(x) 0
602#endif
603
604#if __clang__ && defined __has_extension
605 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
606#else
607 #define ECB_CLANG_EXTENSION(x) 0
608#endif
609
610#define ECB_CPP (__cplusplus+0)
611#define ECB_CPP11 (__cplusplus >= 201103L)
612
613#if ECB_CPP
614 #define ECB_C 0
615 #define ECB_STDC_VERSION 0
616#else
617 #define ECB_C 1
618 #define ECB_STDC_VERSION __STDC_VERSION__
619#endif
620
621#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
622#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
623
624#if ECB_CPP
625 #define ECB_EXTERN_C extern "C"
626 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
627 #define ECB_EXTERN_C_END }
628#else
629 #define ECB_EXTERN_C extern
630 #define ECB_EXTERN_C_BEG
631 #define ECB_EXTERN_C_END
632#endif
633
634/*****************************************************************************/
635
636/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
637/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
638
639#if ECB_NO_THREADS
640 #define ECB_NO_SMP 1
641#endif
642
643#if ECB_NO_SMP
644 #define ECB_MEMORY_FENCE do { } while (0)
645#endif
646
647/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
648#if __xlC__ && ECB_CPP
649 #include <builtins.h>
650#endif
651
652#ifndef ECB_MEMORY_FENCE
653 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
654 #if __i386 || __i386__
655 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
656 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
657 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
658 #elif ECB_GCC_AMD64
659 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
660 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
661 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
662 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
663 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
664 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
665 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__
666 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
667 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
668 || defined __ARM_ARCH_7M__ || defined __ARM_ARCH_7R__
669 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
670 #elif __aarch64__
671 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
672 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
673 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
674 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
675 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
676 #elif defined __s390__ || defined __s390x__
677 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
678 #elif defined __mips__
679 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
680 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
681 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
682 #elif defined __alpha__
683 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
684 #elif defined __hppa__
685 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
686 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
687 #elif defined __ia64__
688 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
689 #elif defined __m68k__
690 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
691 #elif defined __m88k__
692 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
693 #elif defined __sh__
694 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
695 #endif
696 #endif
697#endif
698
699#ifndef ECB_MEMORY_FENCE
700 #if ECB_GCC_VERSION(4,7)
701 /* see comment below (stdatomic.h) about the C11 memory model. */
702 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
703 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
704 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
705
706 #elif ECB_CLANG_EXTENSION(c_atomic)
707 /* see comment below (stdatomic.h) about the C11 memory model. */
708 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
709 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
710 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
711
712 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
713 #define ECB_MEMORY_FENCE __sync_synchronize ()
714 #elif _MSC_VER >= 1500 /* VC++ 2008 */
715 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
716 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
717 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
718 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
719 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
720 #elif _MSC_VER >= 1400 /* VC++ 2005 */
721 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
722 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
723 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
724 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
725 #elif defined _WIN32
726 #include <WinNT.h>
727 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
728 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
729 #include <mbarrier.h>
730 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
731 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
732 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
733 #elif __xlC__
734 #define ECB_MEMORY_FENCE __sync ()
735 #endif
736#endif
737
738#ifndef ECB_MEMORY_FENCE
739 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
740 /* we assume that these memory fences work on all variables/all memory accesses, */
741 /* not just C11 atomics and atomic accesses */
742 #include <stdatomic.h>
743 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
744 /* any fence other than seq_cst, which isn't very efficient for us. */
745 /* Why that is, we don't know - either the C11 memory model is quite useless */
746 /* for most usages, or gcc and clang have a bug */
747 /* I *currently* lean towards the latter, and inefficiently implement */
748 /* all three of ecb's fences as a seq_cst fence */
749 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
750 /* for all __atomic_thread_fence's except seq_cst */
751 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
752 #endif
753#endif
754
755#ifndef ECB_MEMORY_FENCE
756 #if !ECB_AVOID_PTHREADS
757 /*
758 * if you get undefined symbol references to pthread_mutex_lock,
759 * or failure to find pthread.h, then you should implement
760 * the ECB_MEMORY_FENCE operations for your cpu/compiler
761 * OR provide pthread.h and link against the posix thread library
762 * of your system.
763 */
764 #include <pthread.h>
765 #define ECB_NEEDS_PTHREADS 1
766 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
767
768 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
769 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
770 #endif
771#endif
772
773#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
774 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
775#endif
776
777#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
778 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
779#endif
780
781/*****************************************************************************/
782
783#if ECB_CPP
784 #define ecb_inline static inline
785#elif ECB_GCC_VERSION(2,5)
786 #define ecb_inline static __inline__
787#elif ECB_C99
788 #define ecb_inline static inline
789#else
790 #define ecb_inline static
791#endif
792
793#if ECB_GCC_VERSION(3,3)
794 #define ecb_restrict __restrict__
795#elif ECB_C99
796 #define ecb_restrict restrict
797#else
798 #define ecb_restrict
799#endif
800
801typedef int ecb_bool;
802
803#define ECB_CONCAT_(a, b) a ## b
804#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
805#define ECB_STRINGIFY_(a) # a
806#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
807#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
808
809#define ecb_function_ ecb_inline
810
811#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
812 #define ecb_attribute(attrlist) __attribute__ (attrlist)
813#else
814 #define ecb_attribute(attrlist)
815#endif
816
817#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
818 #define ecb_is_constant(expr) __builtin_constant_p (expr)
819#else
820 /* possible C11 impl for integral types
821 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
822 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
823
824 #define ecb_is_constant(expr) 0
825#endif
826
827#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
828 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
829#else
830 #define ecb_expect(expr,value) (expr)
831#endif
832
833#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
834 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
835#else
836 #define ecb_prefetch(addr,rw,locality)
837#endif
838
839/* no emulation for ecb_decltype */
840#if ECB_CPP11
841 // older implementations might have problems with decltype(x)::type, work around it
842 template<class T> struct ecb_decltype_t { typedef T type; };
843 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
844#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
845 #define ecb_decltype(x) __typeof__ (x)
846#endif
847
848#if _MSC_VER >= 1300
849 #define ecb_deprecated __declspec (deprecated)
850#else
851 #define ecb_deprecated ecb_attribute ((__deprecated__))
852#endif
853
854#if _MSC_VER >= 1500
855 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
856#elif ECB_GCC_VERSION(4,5)
857 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
858#else
859 #define ecb_deprecated_message(msg) ecb_deprecated
860#endif
861
862#if _MSC_VER >= 1400
863 #define ecb_noinline __declspec (noinline)
864#else
865 #define ecb_noinline ecb_attribute ((__noinline__))
866#endif
867
868#define ecb_unused ecb_attribute ((__unused__))
869#define ecb_const ecb_attribute ((__const__))
870#define ecb_pure ecb_attribute ((__pure__))
871
872#if ECB_C11 || __IBMC_NORETURN
873 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
874 #define ecb_noreturn _Noreturn
875#elif ECB_CPP11
876 #define ecb_noreturn [[noreturn]]
877#elif _MSC_VER >= 1200
878 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
879 #define ecb_noreturn __declspec (noreturn)
880#else
881 #define ecb_noreturn ecb_attribute ((__noreturn__))
882#endif
883
884#if ECB_GCC_VERSION(4,3)
885 #define ecb_artificial ecb_attribute ((__artificial__))
886 #define ecb_hot ecb_attribute ((__hot__))
887 #define ecb_cold ecb_attribute ((__cold__))
888#else
889 #define ecb_artificial
890 #define ecb_hot
891 #define ecb_cold
892#endif
893
894/* put around conditional expressions if you are very sure that the */
895/* expression is mostly true or mostly false. note that these return */
896/* booleans, not the expression. */
343#define expect_false(expr) expect ((expr) != 0, 0) 897#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
344#define expect_true(expr) expect ((expr) != 0, 1) 898#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
899/* for compatibility to the rest of the world */
900#define ecb_likely(expr) ecb_expect_true (expr)
901#define ecb_unlikely(expr) ecb_expect_false (expr)
902
903/* count trailing zero bits and count # of one bits */
904#if ECB_GCC_VERSION(3,4) \
905 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
906 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
907 && ECB_CLANG_BUILTIN(__builtin_popcount))
908 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
909 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
910 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
911 #define ecb_ctz32(x) __builtin_ctz (x)
912 #define ecb_ctz64(x) __builtin_ctzll (x)
913 #define ecb_popcount32(x) __builtin_popcount (x)
914 /* no popcountll */
915#else
916 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
917 ecb_function_ ecb_const int
918 ecb_ctz32 (uint32_t x)
919 {
920 int r = 0;
921
922 x &= ~x + 1; /* this isolates the lowest bit */
923
924#if ECB_branchless_on_i386
925 r += !!(x & 0xaaaaaaaa) << 0;
926 r += !!(x & 0xcccccccc) << 1;
927 r += !!(x & 0xf0f0f0f0) << 2;
928 r += !!(x & 0xff00ff00) << 3;
929 r += !!(x & 0xffff0000) << 4;
930#else
931 if (x & 0xaaaaaaaa) r += 1;
932 if (x & 0xcccccccc) r += 2;
933 if (x & 0xf0f0f0f0) r += 4;
934 if (x & 0xff00ff00) r += 8;
935 if (x & 0xffff0000) r += 16;
936#endif
937
938 return r;
939 }
940
941 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
942 ecb_function_ ecb_const int
943 ecb_ctz64 (uint64_t x)
944 {
945 int shift = x & 0xffffffffU ? 0 : 32;
946 return ecb_ctz32 (x >> shift) + shift;
947 }
948
949 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
950 ecb_function_ ecb_const int
951 ecb_popcount32 (uint32_t x)
952 {
953 x -= (x >> 1) & 0x55555555;
954 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
955 x = ((x >> 4) + x) & 0x0f0f0f0f;
956 x *= 0x01010101;
957
958 return x >> 24;
959 }
960
961 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
962 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
963 {
964 int r = 0;
965
966 if (x >> 16) { x >>= 16; r += 16; }
967 if (x >> 8) { x >>= 8; r += 8; }
968 if (x >> 4) { x >>= 4; r += 4; }
969 if (x >> 2) { x >>= 2; r += 2; }
970 if (x >> 1) { r += 1; }
971
972 return r;
973 }
974
975 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
976 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
977 {
978 int r = 0;
979
980 if (x >> 32) { x >>= 32; r += 32; }
981
982 return r + ecb_ld32 (x);
983 }
984#endif
985
986ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
987ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
988ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
989ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
990
991ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
992ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
993{
994 return ( (x * 0x0802U & 0x22110U)
995 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
996}
997
998ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
999ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1000{
1001 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1002 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1003 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1004 x = ( x >> 8 ) | ( x << 8);
1005
1006 return x;
1007}
1008
1009ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1010ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1011{
1012 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1013 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1014 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1015 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1016 x = ( x >> 16 ) | ( x << 16);
1017
1018 return x;
1019}
1020
1021/* popcount64 is only available on 64 bit cpus as gcc builtin */
1022/* so for this version we are lazy */
1023ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1024ecb_function_ ecb_const int
1025ecb_popcount64 (uint64_t x)
1026{
1027 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1028}
1029
1030ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1031ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1032ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1033ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1034ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1035ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1036ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1037ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1038
1039ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1040ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1041ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1042ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1043ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1044ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1045ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1046ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1047
1048#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1049 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1050 #define ecb_bswap16(x) __builtin_bswap16 (x)
1051 #else
1052 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1053 #endif
1054 #define ecb_bswap32(x) __builtin_bswap32 (x)
1055 #define ecb_bswap64(x) __builtin_bswap64 (x)
1056#elif _MSC_VER
1057 #include <stdlib.h>
1058 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1059 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1060 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1061#else
1062 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1063 ecb_function_ ecb_const uint16_t
1064 ecb_bswap16 (uint16_t x)
1065 {
1066 return ecb_rotl16 (x, 8);
1067 }
1068
1069 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1070 ecb_function_ ecb_const uint32_t
1071 ecb_bswap32 (uint32_t x)
1072 {
1073 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1074 }
1075
1076 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1077 ecb_function_ ecb_const uint64_t
1078 ecb_bswap64 (uint64_t x)
1079 {
1080 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1081 }
1082#endif
1083
1084#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1085 #define ecb_unreachable() __builtin_unreachable ()
1086#else
1087 /* this seems to work fine, but gcc always emits a warning for it :/ */
1088 ecb_inline ecb_noreturn void ecb_unreachable (void);
1089 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1090#endif
1091
1092/* try to tell the compiler that some condition is definitely true */
1093#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1094
1095ecb_inline ecb_const unsigned char ecb_byteorder_helper (void);
1096ecb_inline ecb_const unsigned char
1097ecb_byteorder_helper (void)
1098{
1099 /* the union code still generates code under pressure in gcc, */
1100 /* but less than using pointers, and always seems to */
1101 /* successfully return a constant. */
1102 /* the reason why we have this horrible preprocessor mess */
1103 /* is to avoid it in all cases, at least on common architectures */
1104 /* or when using a recent enough gcc version (>= 4.6) */
1105#if ((__i386 || __i386__) && !__VOS__) || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64
1106 return 0x44;
1107#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
1108 return 0x44;
1109#elif __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
1110 return 0x11;
1111#else
1112 union
1113 {
1114 uint32_t i;
1115 uint8_t c;
1116 } u = { 0x11223344 };
1117 return u.c;
1118#endif
1119}
1120
1121ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1122ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11; }
1123ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1124ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44; }
1125
1126#if ECB_GCC_VERSION(3,0) || ECB_C99
1127 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1128#else
1129 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1130#endif
1131
1132#if ECB_CPP
1133 template<typename T>
1134 static inline T ecb_div_rd (T val, T div)
1135 {
1136 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1137 }
1138 template<typename T>
1139 static inline T ecb_div_ru (T val, T div)
1140 {
1141 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1142 }
1143#else
1144 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1145 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1146#endif
1147
1148#if ecb_cplusplus_does_not_suck
1149 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1150 template<typename T, int N>
1151 static inline int ecb_array_length (const T (&arr)[N])
1152 {
1153 return N;
1154 }
1155#else
1156 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1157#endif
1158
1159/*******************************************************************************/
1160/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1161
1162/* basically, everything uses "ieee pure-endian" floating point numbers */
1163/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1164#if 0 \
1165 || __i386 || __i386__ \
1166 || ECB_GCC_AMD64 \
1167 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1168 || defined __s390__ || defined __s390x__ \
1169 || defined __mips__ \
1170 || defined __alpha__ \
1171 || defined __hppa__ \
1172 || defined __ia64__ \
1173 || defined __m68k__ \
1174 || defined __m88k__ \
1175 || defined __sh__ \
1176 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1177 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1178 || defined __aarch64__
1179 #define ECB_STDFP 1
1180 #include <string.h> /* for memcpy */
1181#else
1182 #define ECB_STDFP 0
1183#endif
1184
1185#ifndef ECB_NO_LIBM
1186
1187 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1188
1189 /* only the oldest of old doesn't have this one. solaris. */
1190 #ifdef INFINITY
1191 #define ECB_INFINITY INFINITY
1192 #else
1193 #define ECB_INFINITY HUGE_VAL
1194 #endif
1195
1196 #ifdef NAN
1197 #define ECB_NAN NAN
1198 #else
1199 #define ECB_NAN ECB_INFINITY
1200 #endif
1201
1202 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1203 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1204 #define ecb_frexpf(x,e) frexpf ((x), (e))
1205 #else
1206 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1207 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1208 #endif
1209
1210 /* converts an ieee half/binary16 to a float */
1211 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1212 ecb_function_ ecb_const float
1213 ecb_binary16_to_float (uint16_t x)
1214 {
1215 int e = (x >> 10) & 0x1f;
1216 int m = x & 0x3ff;
1217 float r;
1218
1219 if (!e ) r = ecb_ldexpf (m , -24);
1220 else if (e != 31) r = ecb_ldexpf (m + 0x400, e - 25);
1221 else if (m ) r = ECB_NAN;
1222 else r = ECB_INFINITY;
1223
1224 return x & 0x8000 ? -r : r;
1225 }
1226
1227 /* convert a float to ieee single/binary32 */
1228 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1229 ecb_function_ ecb_const uint32_t
1230 ecb_float_to_binary32 (float x)
1231 {
1232 uint32_t r;
1233
1234 #if ECB_STDFP
1235 memcpy (&r, &x, 4);
1236 #else
1237 /* slow emulation, works for anything but -0 */
1238 uint32_t m;
1239 int e;
1240
1241 if (x == 0e0f ) return 0x00000000U;
1242 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1243 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1244 if (x != x ) return 0x7fbfffffU;
1245
1246 m = ecb_frexpf (x, &e) * 0x1000000U;
1247
1248 r = m & 0x80000000U;
1249
1250 if (r)
1251 m = -m;
1252
1253 if (e <= -126)
1254 {
1255 m &= 0xffffffU;
1256 m >>= (-125 - e);
1257 e = -126;
1258 }
1259
1260 r |= (e + 126) << 23;
1261 r |= m & 0x7fffffU;
1262 #endif
1263
1264 return r;
1265 }
1266
1267 /* converts an ieee single/binary32 to a float */
1268 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1269 ecb_function_ ecb_const float
1270 ecb_binary32_to_float (uint32_t x)
1271 {
1272 float r;
1273
1274 #if ECB_STDFP
1275 memcpy (&r, &x, 4);
1276 #else
1277 /* emulation, only works for normals and subnormals and +0 */
1278 int neg = x >> 31;
1279 int e = (x >> 23) & 0xffU;
1280
1281 x &= 0x7fffffU;
1282
1283 if (e)
1284 x |= 0x800000U;
1285 else
1286 e = 1;
1287
1288 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1289 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1290
1291 r = neg ? -r : r;
1292 #endif
1293
1294 return r;
1295 }
1296
1297 /* convert a double to ieee double/binary64 */
1298 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1299 ecb_function_ ecb_const uint64_t
1300 ecb_double_to_binary64 (double x)
1301 {
1302 uint64_t r;
1303
1304 #if ECB_STDFP
1305 memcpy (&r, &x, 8);
1306 #else
1307 /* slow emulation, works for anything but -0 */
1308 uint64_t m;
1309 int e;
1310
1311 if (x == 0e0 ) return 0x0000000000000000U;
1312 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1313 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1314 if (x != x ) return 0X7ff7ffffffffffffU;
1315
1316 m = frexp (x, &e) * 0x20000000000000U;
1317
1318 r = m & 0x8000000000000000;;
1319
1320 if (r)
1321 m = -m;
1322
1323 if (e <= -1022)
1324 {
1325 m &= 0x1fffffffffffffU;
1326 m >>= (-1021 - e);
1327 e = -1022;
1328 }
1329
1330 r |= ((uint64_t)(e + 1022)) << 52;
1331 r |= m & 0xfffffffffffffU;
1332 #endif
1333
1334 return r;
1335 }
1336
1337 /* converts an ieee double/binary64 to a double */
1338 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1339 ecb_function_ ecb_const double
1340 ecb_binary64_to_double (uint64_t x)
1341 {
1342 double r;
1343
1344 #if ECB_STDFP
1345 memcpy (&r, &x, 8);
1346 #else
1347 /* emulation, only works for normals and subnormals and +0 */
1348 int neg = x >> 63;
1349 int e = (x >> 52) & 0x7ffU;
1350
1351 x &= 0xfffffffffffffU;
1352
1353 if (e)
1354 x |= 0x10000000000000U;
1355 else
1356 e = 1;
1357
1358 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1359 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1360
1361 r = neg ? -r : r;
1362 #endif
1363
1364 return r;
1365 }
1366
1367#endif
1368
1369#endif
1370
1371/* ECB.H END */
1372
1373#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1374/* if your architecture doesn't need memory fences, e.g. because it is
1375 * single-cpu/core, or if you use libev in a project that doesn't use libev
1376 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1377 * libev, in which cases the memory fences become nops.
1378 * alternatively, you can remove this #error and link against libpthread,
1379 * which will then provide the memory fences.
1380 */
1381# error "memory fences not defined for your architecture, please report"
1382#endif
1383
1384#ifndef ECB_MEMORY_FENCE
1385# define ECB_MEMORY_FENCE do { } while (0)
1386# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1387# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1388#endif
1389
1390#define expect_false(cond) ecb_expect_false (cond)
1391#define expect_true(cond) ecb_expect_true (cond)
1392#define noinline ecb_noinline
1393
345#define inline_size static inline 1394#define inline_size ecb_inline
346 1395
347#if EV_MINIMAL 1396#if EV_FEATURE_CODE
1397# define inline_speed ecb_inline
1398#else
348# define inline_speed static noinline 1399# define inline_speed static noinline
1400#endif
1401
1402#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1403
1404#if EV_MINPRI == EV_MAXPRI
1405# define ABSPRI(w) (((W)w), 0)
349#else 1406#else
350# define inline_speed static inline
351#endif
352
353#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
354#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1407# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1408#endif
355 1409
356#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1410#define EMPTY /* required for microsofts broken pseudo-c compiler */
357#define EMPTY2(a,b) /* used to suppress some warnings */ 1411#define EMPTY2(a,b) /* used to suppress some warnings */
358 1412
359typedef ev_watcher *W; 1413typedef ev_watcher *W;
… …
361typedef ev_watcher_time *WT; 1415typedef ev_watcher_time *WT;
362 1416
363#define ev_active(w) ((W)(w))->active 1417#define ev_active(w) ((W)(w))->active
364#define ev_at(w) ((WT)(w))->at 1418#define ev_at(w) ((WT)(w))->at
365 1419
1420#if EV_USE_REALTIME
1421/* sig_atomic_t is used to avoid per-thread variables or locking but still */
1422/* giving it a reasonably high chance of working on typical architectures */
1423static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1424#endif
1425
366#if EV_USE_MONOTONIC 1426#if EV_USE_MONOTONIC
367/* sig_atomic_t is used to avoid per-thread variables or locking but still */
368/* giving it a reasonably high chance of working on typical architetcures */
369static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1427static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1428#endif
1429
1430#ifndef EV_FD_TO_WIN32_HANDLE
1431# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1432#endif
1433#ifndef EV_WIN32_HANDLE_TO_FD
1434# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1435#endif
1436#ifndef EV_WIN32_CLOSE_FD
1437# define EV_WIN32_CLOSE_FD(fd) close (fd)
370#endif 1438#endif
371 1439
372#ifdef _WIN32 1440#ifdef _WIN32
373# include "ev_win32.c" 1441# include "ev_win32.c"
374#endif 1442#endif
375 1443
376/*****************************************************************************/ 1444/*****************************************************************************/
377 1445
1446/* define a suitable floor function (only used by periodics atm) */
1447
1448#if EV_USE_FLOOR
1449# include <math.h>
1450# define ev_floor(v) floor (v)
1451#else
1452
1453#include <float.h>
1454
1455/* a floor() replacement function, should be independent of ev_tstamp type */
1456static ev_tstamp noinline
1457ev_floor (ev_tstamp v)
1458{
1459 /* the choice of shift factor is not terribly important */
1460#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1461 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1462#else
1463 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1464#endif
1465
1466 /* argument too large for an unsigned long? */
1467 if (expect_false (v >= shift))
1468 {
1469 ev_tstamp f;
1470
1471 if (v == v - 1.)
1472 return v; /* very large number */
1473
1474 f = shift * ev_floor (v * (1. / shift));
1475 return f + ev_floor (v - f);
1476 }
1477
1478 /* special treatment for negative args? */
1479 if (expect_false (v < 0.))
1480 {
1481 ev_tstamp f = -ev_floor (-v);
1482
1483 return f - (f == v ? 0 : 1);
1484 }
1485
1486 /* fits into an unsigned long */
1487 return (unsigned long)v;
1488}
1489
1490#endif
1491
1492/*****************************************************************************/
1493
1494#ifdef __linux
1495# include <sys/utsname.h>
1496#endif
1497
1498static unsigned int noinline ecb_cold
1499ev_linux_version (void)
1500{
1501#ifdef __linux
1502 unsigned int v = 0;
1503 struct utsname buf;
1504 int i;
1505 char *p = buf.release;
1506
1507 if (uname (&buf))
1508 return 0;
1509
1510 for (i = 3+1; --i; )
1511 {
1512 unsigned int c = 0;
1513
1514 for (;;)
1515 {
1516 if (*p >= '0' && *p <= '9')
1517 c = c * 10 + *p++ - '0';
1518 else
1519 {
1520 p += *p == '.';
1521 break;
1522 }
1523 }
1524
1525 v = (v << 8) | c;
1526 }
1527
1528 return v;
1529#else
1530 return 0;
1531#endif
1532}
1533
1534/*****************************************************************************/
1535
1536#if EV_AVOID_STDIO
1537static void noinline ecb_cold
1538ev_printerr (const char *msg)
1539{
1540 write (STDERR_FILENO, msg, strlen (msg));
1541}
1542#endif
1543
378static void (*syserr_cb)(const char *msg); 1544static void (*syserr_cb)(const char *msg) EV_THROW;
379 1545
380void 1546void ecb_cold
381ev_set_syserr_cb (void (*cb)(const char *msg)) 1547ev_set_syserr_cb (void (*cb)(const char *msg) EV_THROW) EV_THROW
382{ 1548{
383 syserr_cb = cb; 1549 syserr_cb = cb;
384} 1550}
385 1551
386static void noinline 1552static void noinline ecb_cold
387syserr (const char *msg) 1553ev_syserr (const char *msg)
388{ 1554{
389 if (!msg) 1555 if (!msg)
390 msg = "(libev) system error"; 1556 msg = "(libev) system error";
391 1557
392 if (syserr_cb) 1558 if (syserr_cb)
393 syserr_cb (msg); 1559 syserr_cb (msg);
394 else 1560 else
395 { 1561 {
1562#if EV_AVOID_STDIO
1563 ev_printerr (msg);
1564 ev_printerr (": ");
1565 ev_printerr (strerror (errno));
1566 ev_printerr ("\n");
1567#else
396 perror (msg); 1568 perror (msg);
1569#endif
397 abort (); 1570 abort ();
398 } 1571 }
399} 1572}
400 1573
401static void * 1574static void *
402ev_realloc_emul (void *ptr, long size) 1575ev_realloc_emul (void *ptr, long size) EV_THROW
403{ 1576{
404 /* some systems, notably openbsd and darwin, fail to properly 1577 /* some systems, notably openbsd and darwin, fail to properly
405 * implement realloc (x, 0) (as required by both ansi c-98 and 1578 * implement realloc (x, 0) (as required by both ansi c-89 and
406 * the single unix specification, so work around them here. 1579 * the single unix specification, so work around them here.
1580 * recently, also (at least) fedora and debian started breaking it,
1581 * despite documenting it otherwise.
407 */ 1582 */
408 1583
409 if (size) 1584 if (size)
410 return realloc (ptr, size); 1585 return realloc (ptr, size);
411 1586
412 free (ptr); 1587 free (ptr);
413 return 0; 1588 return 0;
414} 1589}
415 1590
416static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1591static void *(*alloc)(void *ptr, long size) EV_THROW = ev_realloc_emul;
417 1592
418void 1593void ecb_cold
419ev_set_allocator (void *(*cb)(void *ptr, long size)) 1594ev_set_allocator (void *(*cb)(void *ptr, long size) EV_THROW) EV_THROW
420{ 1595{
421 alloc = cb; 1596 alloc = cb;
422} 1597}
423 1598
424inline_speed void * 1599inline_speed void *
… …
426{ 1601{
427 ptr = alloc (ptr, size); 1602 ptr = alloc (ptr, size);
428 1603
429 if (!ptr && size) 1604 if (!ptr && size)
430 { 1605 {
1606#if EV_AVOID_STDIO
1607 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1608#else
431 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1609 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1610#endif
432 abort (); 1611 abort ();
433 } 1612 }
434 1613
435 return ptr; 1614 return ptr;
436} 1615}
… …
438#define ev_malloc(size) ev_realloc (0, (size)) 1617#define ev_malloc(size) ev_realloc (0, (size))
439#define ev_free(ptr) ev_realloc ((ptr), 0) 1618#define ev_free(ptr) ev_realloc ((ptr), 0)
440 1619
441/*****************************************************************************/ 1620/*****************************************************************************/
442 1621
1622/* set in reify when reification needed */
1623#define EV_ANFD_REIFY 1
1624
1625/* file descriptor info structure */
443typedef struct 1626typedef struct
444{ 1627{
445 WL head; 1628 WL head;
446 unsigned char events; 1629 unsigned char events; /* the events watched for */
1630 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1631 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */
447 unsigned char reify; 1632 unsigned char unused;
1633#if EV_USE_EPOLL
1634 unsigned int egen; /* generation counter to counter epoll bugs */
1635#endif
448#if EV_SELECT_IS_WINSOCKET 1636#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
449 SOCKET handle; 1637 SOCKET handle;
450#endif 1638#endif
1639#if EV_USE_IOCP
1640 OVERLAPPED or, ow;
1641#endif
451} ANFD; 1642} ANFD;
452 1643
1644/* stores the pending event set for a given watcher */
453typedef struct 1645typedef struct
454{ 1646{
455 W w; 1647 W w;
456 int events; 1648 int events; /* the pending event set for the given watcher */
457} ANPENDING; 1649} ANPENDING;
458 1650
459#if EV_USE_INOTIFY 1651#if EV_USE_INOTIFY
460/* hash table entry per inotify-id */ 1652/* hash table entry per inotify-id */
461typedef struct 1653typedef struct
… …
464} ANFS; 1656} ANFS;
465#endif 1657#endif
466 1658
467/* Heap Entry */ 1659/* Heap Entry */
468#if EV_HEAP_CACHE_AT 1660#if EV_HEAP_CACHE_AT
1661 /* a heap element */
469 typedef struct { 1662 typedef struct {
470 ev_tstamp at; 1663 ev_tstamp at;
471 WT w; 1664 WT w;
472 } ANHE; 1665 } ANHE;
473 1666
474 #define ANHE_w(he) (he).w /* access watcher, read-write */ 1667 #define ANHE_w(he) (he).w /* access watcher, read-write */
475 #define ANHE_at(he) (he).at /* access cached at, read-only */ 1668 #define ANHE_at(he) (he).at /* access cached at, read-only */
476 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */ 1669 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
477#else 1670#else
1671 /* a heap element */
478 typedef WT ANHE; 1672 typedef WT ANHE;
479 1673
480 #define ANHE_w(he) (he) 1674 #define ANHE_w(he) (he)
481 #define ANHE_at(he) (he)->at 1675 #define ANHE_at(he) (he)->at
482 #define ANHE_at_cache(he) 1676 #define ANHE_at_cache(he)
… …
493 #undef VAR 1687 #undef VAR
494 }; 1688 };
495 #include "ev_wrap.h" 1689 #include "ev_wrap.h"
496 1690
497 static struct ev_loop default_loop_struct; 1691 static struct ev_loop default_loop_struct;
498 struct ev_loop *ev_default_loop_ptr; 1692 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
499 1693
500#else 1694#else
501 1695
502 ev_tstamp ev_rt_now; 1696 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
503 #define VAR(name,decl) static decl; 1697 #define VAR(name,decl) static decl;
504 #include "ev_vars.h" 1698 #include "ev_vars.h"
505 #undef VAR 1699 #undef VAR
506 1700
507 static int ev_default_loop_ptr; 1701 static int ev_default_loop_ptr;
508 1702
509#endif 1703#endif
510 1704
1705#if EV_FEATURE_API
1706# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1707# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1708# define EV_INVOKE_PENDING invoke_cb (EV_A)
1709#else
1710# define EV_RELEASE_CB (void)0
1711# define EV_ACQUIRE_CB (void)0
1712# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1713#endif
1714
1715#define EVBREAK_RECURSE 0x80
1716
511/*****************************************************************************/ 1717/*****************************************************************************/
512 1718
1719#ifndef EV_HAVE_EV_TIME
513ev_tstamp 1720ev_tstamp
514ev_time (void) 1721ev_time (void) EV_THROW
515{ 1722{
516#if EV_USE_REALTIME 1723#if EV_USE_REALTIME
1724 if (expect_true (have_realtime))
1725 {
517 struct timespec ts; 1726 struct timespec ts;
518 clock_gettime (CLOCK_REALTIME, &ts); 1727 clock_gettime (CLOCK_REALTIME, &ts);
519 return ts.tv_sec + ts.tv_nsec * 1e-9; 1728 return ts.tv_sec + ts.tv_nsec * 1e-9;
520#else 1729 }
1730#endif
1731
521 struct timeval tv; 1732 struct timeval tv;
522 gettimeofday (&tv, 0); 1733 gettimeofday (&tv, 0);
523 return tv.tv_sec + tv.tv_usec * 1e-6; 1734 return tv.tv_sec + tv.tv_usec * 1e-6;
524#endif
525} 1735}
1736#endif
526 1737
527ev_tstamp inline_size 1738inline_size ev_tstamp
528get_clock (void) 1739get_clock (void)
529{ 1740{
530#if EV_USE_MONOTONIC 1741#if EV_USE_MONOTONIC
531 if (expect_true (have_monotonic)) 1742 if (expect_true (have_monotonic))
532 { 1743 {
… …
539 return ev_time (); 1750 return ev_time ();
540} 1751}
541 1752
542#if EV_MULTIPLICITY 1753#if EV_MULTIPLICITY
543ev_tstamp 1754ev_tstamp
544ev_now (EV_P) 1755ev_now (EV_P) EV_THROW
545{ 1756{
546 return ev_rt_now; 1757 return ev_rt_now;
547} 1758}
548#endif 1759#endif
549 1760
550void 1761void
551ev_sleep (ev_tstamp delay) 1762ev_sleep (ev_tstamp delay) EV_THROW
552{ 1763{
553 if (delay > 0.) 1764 if (delay > 0.)
554 { 1765 {
555#if EV_USE_NANOSLEEP 1766#if EV_USE_NANOSLEEP
556 struct timespec ts; 1767 struct timespec ts;
557 1768
558 ts.tv_sec = (time_t)delay; 1769 EV_TS_SET (ts, delay);
559 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
560
561 nanosleep (&ts, 0); 1770 nanosleep (&ts, 0);
562#elif defined(_WIN32) 1771#elif defined _WIN32
563 Sleep ((unsigned long)(delay * 1e3)); 1772 Sleep ((unsigned long)(delay * 1e3));
564#else 1773#else
565 struct timeval tv; 1774 struct timeval tv;
566 1775
567 tv.tv_sec = (time_t)delay;
568 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
569
570 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1776 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
571 /* somehting nto guaranteed by newer posix versions, but guaranteed */ 1777 /* something not guaranteed by newer posix versions, but guaranteed */
572 /* by older ones */ 1778 /* by older ones */
1779 EV_TV_SET (tv, delay);
573 select (0, 0, 0, 0, &tv); 1780 select (0, 0, 0, 0, &tv);
574#endif 1781#endif
575 } 1782 }
576} 1783}
577 1784
578/*****************************************************************************/ 1785/*****************************************************************************/
579 1786
580#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1787#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
581 1788
582int inline_size 1789/* find a suitable new size for the given array, */
1790/* hopefully by rounding to a nice-to-malloc size */
1791inline_size int
583array_nextsize (int elem, int cur, int cnt) 1792array_nextsize (int elem, int cur, int cnt)
584{ 1793{
585 int ncur = cur + 1; 1794 int ncur = cur + 1;
586 1795
587 do 1796 do
588 ncur <<= 1; 1797 ncur <<= 1;
589 while (cnt > ncur); 1798 while (cnt > ncur);
590 1799
591 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1800 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
592 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1801 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
593 { 1802 {
594 ncur *= elem; 1803 ncur *= elem;
595 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1804 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
596 ncur = ncur - sizeof (void *) * 4; 1805 ncur = ncur - sizeof (void *) * 4;
… …
598 } 1807 }
599 1808
600 return ncur; 1809 return ncur;
601} 1810}
602 1811
603static noinline void * 1812static void * noinline ecb_cold
604array_realloc (int elem, void *base, int *cur, int cnt) 1813array_realloc (int elem, void *base, int *cur, int cnt)
605{ 1814{
606 *cur = array_nextsize (elem, *cur, cnt); 1815 *cur = array_nextsize (elem, *cur, cnt);
607 return ev_realloc (base, elem * *cur); 1816 return ev_realloc (base, elem * *cur);
608} 1817}
1818
1819#define array_init_zero(base,count) \
1820 memset ((void *)(base), 0, sizeof (*(base)) * (count))
609 1821
610#define array_needsize(type,base,cur,cnt,init) \ 1822#define array_needsize(type,base,cur,cnt,init) \
611 if (expect_false ((cnt) > (cur))) \ 1823 if (expect_false ((cnt) > (cur))) \
612 { \ 1824 { \
613 int ocur_ = (cur); \ 1825 int ecb_unused ocur_ = (cur); \
614 (base) = (type *)array_realloc \ 1826 (base) = (type *)array_realloc \
615 (sizeof (type), (base), &(cur), (cnt)); \ 1827 (sizeof (type), (base), &(cur), (cnt)); \
616 init ((base) + (ocur_), (cur) - ocur_); \ 1828 init ((base) + (ocur_), (cur) - ocur_); \
617 } 1829 }
618 1830
… …
625 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 1837 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
626 } 1838 }
627#endif 1839#endif
628 1840
629#define array_free(stem, idx) \ 1841#define array_free(stem, idx) \
630 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 1842 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
631 1843
632/*****************************************************************************/ 1844/*****************************************************************************/
633 1845
1846/* dummy callback for pending events */
1847static void noinline
1848pendingcb (EV_P_ ev_prepare *w, int revents)
1849{
1850}
1851
634void noinline 1852void noinline
635ev_feed_event (EV_P_ void *w, int revents) 1853ev_feed_event (EV_P_ void *w, int revents) EV_THROW
636{ 1854{
637 W w_ = (W)w; 1855 W w_ = (W)w;
638 int pri = ABSPRI (w_); 1856 int pri = ABSPRI (w_);
639 1857
640 if (expect_false (w_->pending)) 1858 if (expect_false (w_->pending))
… …
644 w_->pending = ++pendingcnt [pri]; 1862 w_->pending = ++pendingcnt [pri];
645 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 1863 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
646 pendings [pri][w_->pending - 1].w = w_; 1864 pendings [pri][w_->pending - 1].w = w_;
647 pendings [pri][w_->pending - 1].events = revents; 1865 pendings [pri][w_->pending - 1].events = revents;
648 } 1866 }
649}
650 1867
651void inline_speed 1868 pendingpri = NUMPRI - 1;
1869}
1870
1871inline_speed void
1872feed_reverse (EV_P_ W w)
1873{
1874 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2);
1875 rfeeds [rfeedcnt++] = w;
1876}
1877
1878inline_size void
1879feed_reverse_done (EV_P_ int revents)
1880{
1881 do
1882 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
1883 while (rfeedcnt);
1884}
1885
1886inline_speed void
652queue_events (EV_P_ W *events, int eventcnt, int type) 1887queue_events (EV_P_ W *events, int eventcnt, int type)
653{ 1888{
654 int i; 1889 int i;
655 1890
656 for (i = 0; i < eventcnt; ++i) 1891 for (i = 0; i < eventcnt; ++i)
657 ev_feed_event (EV_A_ events [i], type); 1892 ev_feed_event (EV_A_ events [i], type);
658} 1893}
659 1894
660/*****************************************************************************/ 1895/*****************************************************************************/
661 1896
662void inline_size 1897inline_speed void
663anfds_init (ANFD *base, int count)
664{
665 while (count--)
666 {
667 base->head = 0;
668 base->events = EV_NONE;
669 base->reify = 0;
670
671 ++base;
672 }
673}
674
675void inline_speed
676fd_event (EV_P_ int fd, int revents) 1898fd_event_nocheck (EV_P_ int fd, int revents)
677{ 1899{
678 ANFD *anfd = anfds + fd; 1900 ANFD *anfd = anfds + fd;
679 ev_io *w; 1901 ev_io *w;
680 1902
681 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1903 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
685 if (ev) 1907 if (ev)
686 ev_feed_event (EV_A_ (W)w, ev); 1908 ev_feed_event (EV_A_ (W)w, ev);
687 } 1909 }
688} 1910}
689 1911
1912/* do not submit kernel events for fds that have reify set */
1913/* because that means they changed while we were polling for new events */
1914inline_speed void
1915fd_event (EV_P_ int fd, int revents)
1916{
1917 ANFD *anfd = anfds + fd;
1918
1919 if (expect_true (!anfd->reify))
1920 fd_event_nocheck (EV_A_ fd, revents);
1921}
1922
690void 1923void
691ev_feed_fd_event (EV_P_ int fd, int revents) 1924ev_feed_fd_event (EV_P_ int fd, int revents) EV_THROW
692{ 1925{
693 if (fd >= 0 && fd < anfdmax) 1926 if (fd >= 0 && fd < anfdmax)
694 fd_event (EV_A_ fd, revents); 1927 fd_event_nocheck (EV_A_ fd, revents);
695} 1928}
696 1929
697void inline_size 1930/* make sure the external fd watch events are in-sync */
1931/* with the kernel/libev internal state */
1932inline_size void
698fd_reify (EV_P) 1933fd_reify (EV_P)
699{ 1934{
700 int i; 1935 int i;
1936
1937#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
1938 for (i = 0; i < fdchangecnt; ++i)
1939 {
1940 int fd = fdchanges [i];
1941 ANFD *anfd = anfds + fd;
1942
1943 if (anfd->reify & EV__IOFDSET && anfd->head)
1944 {
1945 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
1946
1947 if (handle != anfd->handle)
1948 {
1949 unsigned long arg;
1950
1951 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
1952
1953 /* handle changed, but fd didn't - we need to do it in two steps */
1954 backend_modify (EV_A_ fd, anfd->events, 0);
1955 anfd->events = 0;
1956 anfd->handle = handle;
1957 }
1958 }
1959 }
1960#endif
701 1961
702 for (i = 0; i < fdchangecnt; ++i) 1962 for (i = 0; i < fdchangecnt; ++i)
703 { 1963 {
704 int fd = fdchanges [i]; 1964 int fd = fdchanges [i];
705 ANFD *anfd = anfds + fd; 1965 ANFD *anfd = anfds + fd;
706 ev_io *w; 1966 ev_io *w;
707 1967
708 unsigned char events = 0; 1968 unsigned char o_events = anfd->events;
1969 unsigned char o_reify = anfd->reify;
709 1970
710 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 1971 anfd->reify = 0;
711 events |= (unsigned char)w->events;
712 1972
713#if EV_SELECT_IS_WINSOCKET 1973 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
714 if (events)
715 { 1974 {
716 unsigned long arg; 1975 anfd->events = 0;
717 #ifdef EV_FD_TO_WIN32_HANDLE 1976
718 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 1977 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
719 #else 1978 anfd->events |= (unsigned char)w->events;
720 anfd->handle = _get_osfhandle (fd); 1979
721 #endif 1980 if (o_events != anfd->events)
722 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 1981 o_reify = EV__IOFDSET; /* actually |= */
723 } 1982 }
724#endif
725 1983
726 { 1984 if (o_reify & EV__IOFDSET)
727 unsigned char o_events = anfd->events;
728 unsigned char o_reify = anfd->reify;
729
730 anfd->reify = 0;
731 anfd->events = events;
732
733 if (o_events != events || o_reify & EV_IOFDSET)
734 backend_modify (EV_A_ fd, o_events, events); 1985 backend_modify (EV_A_ fd, o_events, anfd->events);
735 }
736 } 1986 }
737 1987
738 fdchangecnt = 0; 1988 fdchangecnt = 0;
739} 1989}
740 1990
741void inline_size 1991/* something about the given fd changed */
1992inline_size void
742fd_change (EV_P_ int fd, int flags) 1993fd_change (EV_P_ int fd, int flags)
743{ 1994{
744 unsigned char reify = anfds [fd].reify; 1995 unsigned char reify = anfds [fd].reify;
745 anfds [fd].reify |= flags; 1996 anfds [fd].reify |= flags;
746 1997
… …
750 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2001 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
751 fdchanges [fdchangecnt - 1] = fd; 2002 fdchanges [fdchangecnt - 1] = fd;
752 } 2003 }
753} 2004}
754 2005
755void inline_speed 2006/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
2007inline_speed void ecb_cold
756fd_kill (EV_P_ int fd) 2008fd_kill (EV_P_ int fd)
757{ 2009{
758 ev_io *w; 2010 ev_io *w;
759 2011
760 while ((w = (ev_io *)anfds [fd].head)) 2012 while ((w = (ev_io *)anfds [fd].head))
… …
762 ev_io_stop (EV_A_ w); 2014 ev_io_stop (EV_A_ w);
763 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2015 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
764 } 2016 }
765} 2017}
766 2018
767int inline_size 2019/* check whether the given fd is actually valid, for error recovery */
2020inline_size int ecb_cold
768fd_valid (int fd) 2021fd_valid (int fd)
769{ 2022{
770#ifdef _WIN32 2023#ifdef _WIN32
771 return _get_osfhandle (fd) != -1; 2024 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
772#else 2025#else
773 return fcntl (fd, F_GETFD) != -1; 2026 return fcntl (fd, F_GETFD) != -1;
774#endif 2027#endif
775} 2028}
776 2029
777/* called on EBADF to verify fds */ 2030/* called on EBADF to verify fds */
778static void noinline 2031static void noinline ecb_cold
779fd_ebadf (EV_P) 2032fd_ebadf (EV_P)
780{ 2033{
781 int fd; 2034 int fd;
782 2035
783 for (fd = 0; fd < anfdmax; ++fd) 2036 for (fd = 0; fd < anfdmax; ++fd)
… …
785 if (!fd_valid (fd) && errno == EBADF) 2038 if (!fd_valid (fd) && errno == EBADF)
786 fd_kill (EV_A_ fd); 2039 fd_kill (EV_A_ fd);
787} 2040}
788 2041
789/* called on ENOMEM in select/poll to kill some fds and retry */ 2042/* called on ENOMEM in select/poll to kill some fds and retry */
790static void noinline 2043static void noinline ecb_cold
791fd_enomem (EV_P) 2044fd_enomem (EV_P)
792{ 2045{
793 int fd; 2046 int fd;
794 2047
795 for (fd = anfdmax; fd--; ) 2048 for (fd = anfdmax; fd--; )
796 if (anfds [fd].events) 2049 if (anfds [fd].events)
797 { 2050 {
798 fd_kill (EV_A_ fd); 2051 fd_kill (EV_A_ fd);
799 return; 2052 break;
800 } 2053 }
801} 2054}
802 2055
803/* usually called after fork if backend needs to re-arm all fds from scratch */ 2056/* usually called after fork if backend needs to re-arm all fds from scratch */
804static void noinline 2057static void noinline
… …
808 2061
809 for (fd = 0; fd < anfdmax; ++fd) 2062 for (fd = 0; fd < anfdmax; ++fd)
810 if (anfds [fd].events) 2063 if (anfds [fd].events)
811 { 2064 {
812 anfds [fd].events = 0; 2065 anfds [fd].events = 0;
2066 anfds [fd].emask = 0;
813 fd_change (EV_A_ fd, EV_IOFDSET | 1); 2067 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
814 } 2068 }
815} 2069}
816 2070
2071/* used to prepare libev internal fd's */
2072/* this is not fork-safe */
2073inline_speed void
2074fd_intern (int fd)
2075{
2076#ifdef _WIN32
2077 unsigned long arg = 1;
2078 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
2079#else
2080 fcntl (fd, F_SETFD, FD_CLOEXEC);
2081 fcntl (fd, F_SETFL, O_NONBLOCK);
2082#endif
2083}
2084
817/*****************************************************************************/ 2085/*****************************************************************************/
818 2086
819/* 2087/*
820 * the heap functions want a real array index. array index 0 uis guaranteed to not 2088 * the heap functions want a real array index. array index 0 is guaranteed to not
821 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives 2089 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
822 * the branching factor of the d-tree. 2090 * the branching factor of the d-tree.
823 */ 2091 */
824 2092
825/* 2093/*
… …
834#define HEAP0 (DHEAP - 1) /* index of first element in heap */ 2102#define HEAP0 (DHEAP - 1) /* index of first element in heap */
835#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0) 2103#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
836#define UPHEAP_DONE(p,k) ((p) == (k)) 2104#define UPHEAP_DONE(p,k) ((p) == (k))
837 2105
838/* away from the root */ 2106/* away from the root */
839void inline_speed 2107inline_speed void
840downheap (ANHE *heap, int N, int k) 2108downheap (ANHE *heap, int N, int k)
841{ 2109{
842 ANHE he = heap [k]; 2110 ANHE he = heap [k];
843 ANHE *E = heap + N + HEAP0; 2111 ANHE *E = heap + N + HEAP0;
844 2112
… …
884#define HEAP0 1 2152#define HEAP0 1
885#define HPARENT(k) ((k) >> 1) 2153#define HPARENT(k) ((k) >> 1)
886#define UPHEAP_DONE(p,k) (!(p)) 2154#define UPHEAP_DONE(p,k) (!(p))
887 2155
888/* away from the root */ 2156/* away from the root */
889void inline_speed 2157inline_speed void
890downheap (ANHE *heap, int N, int k) 2158downheap (ANHE *heap, int N, int k)
891{ 2159{
892 ANHE he = heap [k]; 2160 ANHE he = heap [k];
893 2161
894 for (;;) 2162 for (;;)
895 { 2163 {
896 int c = k << 1; 2164 int c = k << 1;
897 2165
898 if (c > N + HEAP0 - 1) 2166 if (c >= N + HEAP0)
899 break; 2167 break;
900 2168
901 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) 2169 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
902 ? 1 : 0; 2170 ? 1 : 0;
903 2171
… …
914 ev_active (ANHE_w (he)) = k; 2182 ev_active (ANHE_w (he)) = k;
915} 2183}
916#endif 2184#endif
917 2185
918/* towards the root */ 2186/* towards the root */
919void inline_speed 2187inline_speed void
920upheap (ANHE *heap, int k) 2188upheap (ANHE *heap, int k)
921{ 2189{
922 ANHE he = heap [k]; 2190 ANHE he = heap [k];
923 2191
924 for (;;) 2192 for (;;)
… …
935 2203
936 heap [k] = he; 2204 heap [k] = he;
937 ev_active (ANHE_w (he)) = k; 2205 ev_active (ANHE_w (he)) = k;
938} 2206}
939 2207
940void inline_size 2208/* move an element suitably so it is in a correct place */
2209inline_size void
941adjustheap (ANHE *heap, int N, int k) 2210adjustheap (ANHE *heap, int N, int k)
942{ 2211{
943 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k])) 2212 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
944 upheap (heap, k); 2213 upheap (heap, k);
945 else 2214 else
946 downheap (heap, N, k); 2215 downheap (heap, N, k);
947} 2216}
948 2217
949/* rebuild the heap: this function is used only once and executed rarely */ 2218/* rebuild the heap: this function is used only once and executed rarely */
950void inline_size 2219inline_size void
951reheap (ANHE *heap, int N) 2220reheap (ANHE *heap, int N)
952{ 2221{
953 int i; 2222 int i;
954 2223
955 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */ 2224 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
… …
958 upheap (heap, i + HEAP0); 2227 upheap (heap, i + HEAP0);
959} 2228}
960 2229
961/*****************************************************************************/ 2230/*****************************************************************************/
962 2231
2232/* associate signal watchers to a signal signal */
963typedef struct 2233typedef struct
964{ 2234{
2235 EV_ATOMIC_T pending;
2236#if EV_MULTIPLICITY
2237 EV_P;
2238#endif
965 WL head; 2239 WL head;
966 EV_ATOMIC_T gotsig;
967} ANSIG; 2240} ANSIG;
968 2241
969static ANSIG *signals; 2242static ANSIG signals [EV_NSIG - 1];
970static int signalmax;
971
972static EV_ATOMIC_T gotsig;
973
974void inline_size
975signals_init (ANSIG *base, int count)
976{
977 while (count--)
978 {
979 base->head = 0;
980 base->gotsig = 0;
981
982 ++base;
983 }
984}
985 2243
986/*****************************************************************************/ 2244/*****************************************************************************/
987 2245
988void inline_speed 2246#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
989fd_intern (int fd)
990{
991#ifdef _WIN32
992 unsigned long arg = 1;
993 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
994#else
995 fcntl (fd, F_SETFD, FD_CLOEXEC);
996 fcntl (fd, F_SETFL, O_NONBLOCK);
997#endif
998}
999 2247
1000static void noinline 2248static void noinline ecb_cold
1001evpipe_init (EV_P) 2249evpipe_init (EV_P)
1002{ 2250{
1003 if (!ev_is_active (&pipeev)) 2251 if (!ev_is_active (&pipe_w))
2252 {
2253 int fds [2];
2254
2255# if EV_USE_EVENTFD
2256 fds [0] = -1;
2257 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2258 if (fds [1] < 0 && errno == EINVAL)
2259 fds [1] = eventfd (0, 0);
2260
2261 if (fds [1] < 0)
2262# endif
2263 {
2264 while (pipe (fds))
2265 ev_syserr ("(libev) error creating signal/async pipe");
2266
2267 fd_intern (fds [0]);
2268 }
2269
2270 evpipe [0] = fds [0];
2271
2272 if (evpipe [1] < 0)
2273 evpipe [1] = fds [1]; /* first call, set write fd */
2274 else
2275 {
2276 /* on subsequent calls, do not change evpipe [1] */
2277 /* so that evpipe_write can always rely on its value. */
2278 /* this branch does not do anything sensible on windows, */
2279 /* so must not be executed on windows */
2280
2281 dup2 (fds [1], evpipe [1]);
2282 close (fds [1]);
2283 }
2284
2285 fd_intern (evpipe [1]);
2286
2287 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2288 ev_io_start (EV_A_ &pipe_w);
2289 ev_unref (EV_A); /* watcher should not keep loop alive */
1004 { 2290 }
2291}
2292
2293inline_speed void
2294evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2295{
2296 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2297
2298 if (expect_true (*flag))
2299 return;
2300
2301 *flag = 1;
2302 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2303
2304 pipe_write_skipped = 1;
2305
2306 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2307
2308 if (pipe_write_wanted)
2309 {
2310 int old_errno;
2311
2312 pipe_write_skipped = 0;
2313 ECB_MEMORY_FENCE_RELEASE;
2314
2315 old_errno = errno; /* save errno because write will clobber it */
2316
1005#if EV_USE_EVENTFD 2317#if EV_USE_EVENTFD
1006 if ((evfd = eventfd (0, 0)) >= 0) 2318 if (evpipe [0] < 0)
1007 { 2319 {
1008 evpipe [0] = -1; 2320 uint64_t counter = 1;
1009 fd_intern (evfd); 2321 write (evpipe [1], &counter, sizeof (uint64_t));
1010 ev_io_set (&pipeev, evfd, EV_READ);
1011 } 2322 }
1012 else 2323 else
1013#endif 2324#endif
1014 { 2325 {
1015 while (pipe (evpipe)) 2326#ifdef _WIN32
1016 syserr ("(libev) error creating signal/async pipe"); 2327 WSABUF buf;
1017 2328 DWORD sent;
1018 fd_intern (evpipe [0]); 2329 buf.buf = &buf;
1019 fd_intern (evpipe [1]); 2330 buf.len = 1;
1020 ev_io_set (&pipeev, evpipe [0], EV_READ); 2331 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2332#else
2333 write (evpipe [1], &(evpipe [1]), 1);
2334#endif
1021 } 2335 }
1022 2336
1023 ev_io_start (EV_A_ &pipeev); 2337 errno = old_errno;
1024 ev_unref (EV_A); /* watcher should not keep loop alive */
1025 }
1026}
1027
1028void inline_size
1029evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1030{
1031 if (!*flag)
1032 { 2338 }
1033 int old_errno = errno; /* save errno because write might clobber it */ 2339}
1034 2340
1035 *flag = 1; 2341/* called whenever the libev signal pipe */
2342/* got some events (signal, async) */
2343static void
2344pipecb (EV_P_ ev_io *iow, int revents)
2345{
2346 int i;
1036 2347
2348 if (revents & EV_READ)
2349 {
1037#if EV_USE_EVENTFD 2350#if EV_USE_EVENTFD
1038 if (evfd >= 0) 2351 if (evpipe [0] < 0)
1039 { 2352 {
1040 uint64_t counter = 1; 2353 uint64_t counter;
1041 write (evfd, &counter, sizeof (uint64_t)); 2354 read (evpipe [1], &counter, sizeof (uint64_t));
1042 } 2355 }
1043 else 2356 else
1044#endif 2357#endif
1045 write (evpipe [1], &old_errno, 1); 2358 {
1046
1047 errno = old_errno;
1048 }
1049}
1050
1051static void
1052pipecb (EV_P_ ev_io *iow, int revents)
1053{
1054#if EV_USE_EVENTFD
1055 if (evfd >= 0)
1056 {
1057 uint64_t counter;
1058 read (evfd, &counter, sizeof (uint64_t));
1059 }
1060 else
1061#endif
1062 {
1063 char dummy; 2359 char dummy[4];
2360#ifdef _WIN32
2361 WSABUF buf;
2362 DWORD recvd;
2363 DWORD flags = 0;
2364 buf.buf = dummy;
2365 buf.len = sizeof (dummy);
2366 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2367#else
1064 read (evpipe [0], &dummy, 1); 2368 read (evpipe [0], &dummy, sizeof (dummy));
2369#endif
2370 }
2371 }
2372
2373 pipe_write_skipped = 0;
2374
2375 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2376
2377#if EV_SIGNAL_ENABLE
2378 if (sig_pending)
1065 } 2379 {
2380 sig_pending = 0;
1066 2381
1067 if (gotsig && ev_is_default_loop (EV_A)) 2382 ECB_MEMORY_FENCE;
1068 {
1069 int signum;
1070 gotsig = 0;
1071 2383
1072 for (signum = signalmax; signum--; ) 2384 for (i = EV_NSIG - 1; i--; )
1073 if (signals [signum].gotsig) 2385 if (expect_false (signals [i].pending))
1074 ev_feed_signal_event (EV_A_ signum + 1); 2386 ev_feed_signal_event (EV_A_ i + 1);
1075 } 2387 }
2388#endif
1076 2389
1077#if EV_ASYNC_ENABLE 2390#if EV_ASYNC_ENABLE
1078 if (gotasync) 2391 if (async_pending)
1079 { 2392 {
1080 int i; 2393 async_pending = 0;
1081 gotasync = 0; 2394
2395 ECB_MEMORY_FENCE;
1082 2396
1083 for (i = asynccnt; i--; ) 2397 for (i = asynccnt; i--; )
1084 if (asyncs [i]->sent) 2398 if (asyncs [i]->sent)
1085 { 2399 {
1086 asyncs [i]->sent = 0; 2400 asyncs [i]->sent = 0;
2401 ECB_MEMORY_FENCE_RELEASE;
1087 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2402 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1088 } 2403 }
1089 } 2404 }
1090#endif 2405#endif
1091} 2406}
1092 2407
1093/*****************************************************************************/ 2408/*****************************************************************************/
1094 2409
2410void
2411ev_feed_signal (int signum) EV_THROW
2412{
2413#if EV_MULTIPLICITY
2414 EV_P;
2415 ECB_MEMORY_FENCE_ACQUIRE;
2416 EV_A = signals [signum - 1].loop;
2417
2418 if (!EV_A)
2419 return;
2420#endif
2421
2422 signals [signum - 1].pending = 1;
2423 evpipe_write (EV_A_ &sig_pending);
2424}
2425
1095static void 2426static void
1096ev_sighandler (int signum) 2427ev_sighandler (int signum)
1097{ 2428{
2429#ifdef _WIN32
2430 signal (signum, ev_sighandler);
2431#endif
2432
2433 ev_feed_signal (signum);
2434}
2435
2436void noinline
2437ev_feed_signal_event (EV_P_ int signum) EV_THROW
2438{
2439 WL w;
2440
2441 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2442 return;
2443
2444 --signum;
2445
1098#if EV_MULTIPLICITY 2446#if EV_MULTIPLICITY
1099 struct ev_loop *loop = &default_loop_struct; 2447 /* it is permissible to try to feed a signal to the wrong loop */
1100#endif 2448 /* or, likely more useful, feeding a signal nobody is waiting for */
1101 2449
1102#if _WIN32 2450 if (expect_false (signals [signum].loop != EV_A))
1103 signal (signum, ev_sighandler);
1104#endif
1105
1106 signals [signum - 1].gotsig = 1;
1107 evpipe_write (EV_A_ &gotsig);
1108}
1109
1110void noinline
1111ev_feed_signal_event (EV_P_ int signum)
1112{
1113 WL w;
1114
1115#if EV_MULTIPLICITY
1116 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
1117#endif
1118
1119 --signum;
1120
1121 if (signum < 0 || signum >= signalmax)
1122 return; 2451 return;
2452#endif
1123 2453
1124 signals [signum].gotsig = 0; 2454 signals [signum].pending = 0;
2455 ECB_MEMORY_FENCE_RELEASE;
1125 2456
1126 for (w = signals [signum].head; w; w = w->next) 2457 for (w = signals [signum].head; w; w = w->next)
1127 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2458 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1128} 2459}
1129 2460
2461#if EV_USE_SIGNALFD
2462static void
2463sigfdcb (EV_P_ ev_io *iow, int revents)
2464{
2465 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2466
2467 for (;;)
2468 {
2469 ssize_t res = read (sigfd, si, sizeof (si));
2470
2471 /* not ISO-C, as res might be -1, but works with SuS */
2472 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2473 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2474
2475 if (res < (ssize_t)sizeof (si))
2476 break;
2477 }
2478}
2479#endif
2480
2481#endif
2482
1130/*****************************************************************************/ 2483/*****************************************************************************/
1131 2484
2485#if EV_CHILD_ENABLE
1132static WL childs [EV_PID_HASHSIZE]; 2486static WL childs [EV_PID_HASHSIZE];
1133
1134#ifndef _WIN32
1135 2487
1136static ev_signal childev; 2488static ev_signal childev;
1137 2489
1138#ifndef WIFCONTINUED 2490#ifndef WIFCONTINUED
1139# define WIFCONTINUED(status) 0 2491# define WIFCONTINUED(status) 0
1140#endif 2492#endif
1141 2493
1142void inline_speed 2494/* handle a single child status event */
2495inline_speed void
1143child_reap (EV_P_ int chain, int pid, int status) 2496child_reap (EV_P_ int chain, int pid, int status)
1144{ 2497{
1145 ev_child *w; 2498 ev_child *w;
1146 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 2499 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1147 2500
1148 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2501 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1149 { 2502 {
1150 if ((w->pid == pid || !w->pid) 2503 if ((w->pid == pid || !w->pid)
1151 && (!traced || (w->flags & 1))) 2504 && (!traced || (w->flags & 1)))
1152 { 2505 {
1153 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 2506 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
1160 2513
1161#ifndef WCONTINUED 2514#ifndef WCONTINUED
1162# define WCONTINUED 0 2515# define WCONTINUED 0
1163#endif 2516#endif
1164 2517
2518/* called on sigchld etc., calls waitpid */
1165static void 2519static void
1166childcb (EV_P_ ev_signal *sw, int revents) 2520childcb (EV_P_ ev_signal *sw, int revents)
1167{ 2521{
1168 int pid, status; 2522 int pid, status;
1169 2523
… …
1177 /* make sure we are called again until all children have been reaped */ 2531 /* make sure we are called again until all children have been reaped */
1178 /* we need to do it this way so that the callback gets called before we continue */ 2532 /* we need to do it this way so that the callback gets called before we continue */
1179 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2533 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1180 2534
1181 child_reap (EV_A_ pid, pid, status); 2535 child_reap (EV_A_ pid, pid, status);
1182 if (EV_PID_HASHSIZE > 1) 2536 if ((EV_PID_HASHSIZE) > 1)
1183 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2537 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1184} 2538}
1185 2539
1186#endif 2540#endif
1187 2541
1188/*****************************************************************************/ 2542/*****************************************************************************/
1189 2543
2544#if EV_USE_IOCP
2545# include "ev_iocp.c"
2546#endif
1190#if EV_USE_PORT 2547#if EV_USE_PORT
1191# include "ev_port.c" 2548# include "ev_port.c"
1192#endif 2549#endif
1193#if EV_USE_KQUEUE 2550#if EV_USE_KQUEUE
1194# include "ev_kqueue.c" 2551# include "ev_kqueue.c"
… …
1201#endif 2558#endif
1202#if EV_USE_SELECT 2559#if EV_USE_SELECT
1203# include "ev_select.c" 2560# include "ev_select.c"
1204#endif 2561#endif
1205 2562
1206int 2563int ecb_cold
1207ev_version_major (void) 2564ev_version_major (void) EV_THROW
1208{ 2565{
1209 return EV_VERSION_MAJOR; 2566 return EV_VERSION_MAJOR;
1210} 2567}
1211 2568
1212int 2569int ecb_cold
1213ev_version_minor (void) 2570ev_version_minor (void) EV_THROW
1214{ 2571{
1215 return EV_VERSION_MINOR; 2572 return EV_VERSION_MINOR;
1216} 2573}
1217 2574
1218/* return true if we are running with elevated privileges and should ignore env variables */ 2575/* return true if we are running with elevated privileges and should ignore env variables */
1219int inline_size 2576int inline_size ecb_cold
1220enable_secure (void) 2577enable_secure (void)
1221{ 2578{
1222#ifdef _WIN32 2579#ifdef _WIN32
1223 return 0; 2580 return 0;
1224#else 2581#else
1225 return getuid () != geteuid () 2582 return getuid () != geteuid ()
1226 || getgid () != getegid (); 2583 || getgid () != getegid ();
1227#endif 2584#endif
1228} 2585}
1229 2586
1230unsigned int 2587unsigned int ecb_cold
1231ev_supported_backends (void) 2588ev_supported_backends (void) EV_THROW
1232{ 2589{
1233 unsigned int flags = 0; 2590 unsigned int flags = 0;
1234 2591
1235 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2592 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1236 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2593 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE;
… …
1239 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2596 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT;
1240 2597
1241 return flags; 2598 return flags;
1242} 2599}
1243 2600
1244unsigned int 2601unsigned int ecb_cold
1245ev_recommended_backends (void) 2602ev_recommended_backends (void) EV_THROW
1246{ 2603{
1247 unsigned int flags = ev_supported_backends (); 2604 unsigned int flags = ev_supported_backends ();
1248 2605
1249#ifndef __NetBSD__ 2606#ifndef __NetBSD__
1250 /* kqueue is borked on everything but netbsd apparently */ 2607 /* kqueue is borked on everything but netbsd apparently */
1251 /* it usually doesn't work correctly on anything but sockets and pipes */ 2608 /* it usually doesn't work correctly on anything but sockets and pipes */
1252 flags &= ~EVBACKEND_KQUEUE; 2609 flags &= ~EVBACKEND_KQUEUE;
1253#endif 2610#endif
1254#ifdef __APPLE__ 2611#ifdef __APPLE__
1255 // flags &= ~EVBACKEND_KQUEUE; for documentation 2612 /* only select works correctly on that "unix-certified" platform */
1256 flags &= ~EVBACKEND_POLL; 2613 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2614 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2615#endif
2616#ifdef __FreeBSD__
2617 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1257#endif 2618#endif
1258 2619
1259 return flags; 2620 return flags;
1260} 2621}
1261 2622
2623unsigned int ecb_cold
2624ev_embeddable_backends (void) EV_THROW
2625{
2626 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
2627
2628 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
2629 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
2630 flags &= ~EVBACKEND_EPOLL;
2631
2632 return flags;
2633}
2634
1262unsigned int 2635unsigned int
1263ev_embeddable_backends (void) 2636ev_backend (EV_P) EV_THROW
1264{ 2637{
1265 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2638 return backend;
1266
1267 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1268 /* please fix it and tell me how to detect the fix */
1269 flags &= ~EVBACKEND_EPOLL;
1270
1271 return flags;
1272} 2639}
1273 2640
2641#if EV_FEATURE_API
1274unsigned int 2642unsigned int
1275ev_backend (EV_P) 2643ev_iteration (EV_P) EV_THROW
1276{ 2644{
1277 return backend; 2645 return loop_count;
1278} 2646}
1279 2647
1280unsigned int 2648unsigned int
1281ev_loop_count (EV_P) 2649ev_depth (EV_P) EV_THROW
1282{ 2650{
1283 return loop_count; 2651 return loop_depth;
1284} 2652}
1285 2653
1286void 2654void
1287ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2655ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1288{ 2656{
1289 io_blocktime = interval; 2657 io_blocktime = interval;
1290} 2658}
1291 2659
1292void 2660void
1293ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2661ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_THROW
1294{ 2662{
1295 timeout_blocktime = interval; 2663 timeout_blocktime = interval;
1296} 2664}
1297 2665
2666void
2667ev_set_userdata (EV_P_ void *data) EV_THROW
2668{
2669 userdata = data;
2670}
2671
2672void *
2673ev_userdata (EV_P) EV_THROW
2674{
2675 return userdata;
2676}
2677
2678void
2679ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_THROW
2680{
2681 invoke_cb = invoke_pending_cb;
2682}
2683
2684void
2685ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_THROW, void (*acquire)(EV_P) EV_THROW) EV_THROW
2686{
2687 release_cb = release;
2688 acquire_cb = acquire;
2689}
2690#endif
2691
2692/* initialise a loop structure, must be zero-initialised */
1298static void noinline 2693static void noinline ecb_cold
1299loop_init (EV_P_ unsigned int flags) 2694loop_init (EV_P_ unsigned int flags) EV_THROW
1300{ 2695{
1301 if (!backend) 2696 if (!backend)
1302 { 2697 {
2698 origflags = flags;
2699
2700#if EV_USE_REALTIME
2701 if (!have_realtime)
2702 {
2703 struct timespec ts;
2704
2705 if (!clock_gettime (CLOCK_REALTIME, &ts))
2706 have_realtime = 1;
2707 }
2708#endif
2709
1303#if EV_USE_MONOTONIC 2710#if EV_USE_MONOTONIC
2711 if (!have_monotonic)
1304 { 2712 {
1305 struct timespec ts; 2713 struct timespec ts;
2714
1306 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2715 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1307 have_monotonic = 1; 2716 have_monotonic = 1;
1308 } 2717 }
1309#endif
1310
1311 ev_rt_now = ev_time ();
1312 mn_now = get_clock ();
1313 now_floor = mn_now;
1314 rtmn_diff = ev_rt_now - mn_now;
1315
1316 io_blocktime = 0.;
1317 timeout_blocktime = 0.;
1318 backend = 0;
1319 backend_fd = -1;
1320 gotasync = 0;
1321#if EV_USE_INOTIFY
1322 fs_fd = -2;
1323#endif 2718#endif
1324 2719
1325 /* pid check not overridable via env */ 2720 /* pid check not overridable via env */
1326#ifndef _WIN32 2721#ifndef _WIN32
1327 if (flags & EVFLAG_FORKCHECK) 2722 if (flags & EVFLAG_FORKCHECK)
… …
1331 if (!(flags & EVFLAG_NOENV) 2726 if (!(flags & EVFLAG_NOENV)
1332 && !enable_secure () 2727 && !enable_secure ()
1333 && getenv ("LIBEV_FLAGS")) 2728 && getenv ("LIBEV_FLAGS"))
1334 flags = atoi (getenv ("LIBEV_FLAGS")); 2729 flags = atoi (getenv ("LIBEV_FLAGS"));
1335 2730
1336 if (!(flags & 0x0000ffffU)) 2731 ev_rt_now = ev_time ();
2732 mn_now = get_clock ();
2733 now_floor = mn_now;
2734 rtmn_diff = ev_rt_now - mn_now;
2735#if EV_FEATURE_API
2736 invoke_cb = ev_invoke_pending;
2737#endif
2738
2739 io_blocktime = 0.;
2740 timeout_blocktime = 0.;
2741 backend = 0;
2742 backend_fd = -1;
2743 sig_pending = 0;
2744#if EV_ASYNC_ENABLE
2745 async_pending = 0;
2746#endif
2747 pipe_write_skipped = 0;
2748 pipe_write_wanted = 0;
2749 evpipe [0] = -1;
2750 evpipe [1] = -1;
2751#if EV_USE_INOTIFY
2752 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2753#endif
2754#if EV_USE_SIGNALFD
2755 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2756#endif
2757
2758 if (!(flags & EVBACKEND_MASK))
1337 flags |= ev_recommended_backends (); 2759 flags |= ev_recommended_backends ();
1338 2760
2761#if EV_USE_IOCP
2762 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2763#endif
1339#if EV_USE_PORT 2764#if EV_USE_PORT
1340 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2765 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1341#endif 2766#endif
1342#if EV_USE_KQUEUE 2767#if EV_USE_KQUEUE
1343 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2768 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
… …
1350#endif 2775#endif
1351#if EV_USE_SELECT 2776#if EV_USE_SELECT
1352 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2777 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
1353#endif 2778#endif
1354 2779
2780 ev_prepare_init (&pending_w, pendingcb);
2781
2782#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1355 ev_init (&pipeev, pipecb); 2783 ev_init (&pipe_w, pipecb);
1356 ev_set_priority (&pipeev, EV_MAXPRI); 2784 ev_set_priority (&pipe_w, EV_MAXPRI);
2785#endif
1357 } 2786 }
1358} 2787}
1359 2788
1360static void noinline 2789/* free up a loop structure */
2790void ecb_cold
1361loop_destroy (EV_P) 2791ev_loop_destroy (EV_P)
1362{ 2792{
1363 int i; 2793 int i;
1364 2794
2795#if EV_MULTIPLICITY
2796 /* mimic free (0) */
2797 if (!EV_A)
2798 return;
2799#endif
2800
2801#if EV_CLEANUP_ENABLE
2802 /* queue cleanup watchers (and execute them) */
2803 if (expect_false (cleanupcnt))
2804 {
2805 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
2806 EV_INVOKE_PENDING;
2807 }
2808#endif
2809
2810#if EV_CHILD_ENABLE
2811 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
2812 {
2813 ev_ref (EV_A); /* child watcher */
2814 ev_signal_stop (EV_A_ &childev);
2815 }
2816#endif
2817
1365 if (ev_is_active (&pipeev)) 2818 if (ev_is_active (&pipe_w))
1366 { 2819 {
1367 ev_ref (EV_A); /* signal watcher */ 2820 /*ev_ref (EV_A);*/
1368 ev_io_stop (EV_A_ &pipeev); 2821 /*ev_io_stop (EV_A_ &pipe_w);*/
1369 2822
2823 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
2824 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
2825 }
2826
1370#if EV_USE_EVENTFD 2827#if EV_USE_SIGNALFD
1371 if (evfd >= 0) 2828 if (ev_is_active (&sigfd_w))
1372 close (evfd); 2829 close (sigfd);
1373#endif 2830#endif
1374
1375 if (evpipe [0] >= 0)
1376 {
1377 close (evpipe [0]);
1378 close (evpipe [1]);
1379 }
1380 }
1381 2831
1382#if EV_USE_INOTIFY 2832#if EV_USE_INOTIFY
1383 if (fs_fd >= 0) 2833 if (fs_fd >= 0)
1384 close (fs_fd); 2834 close (fs_fd);
1385#endif 2835#endif
1386 2836
1387 if (backend_fd >= 0) 2837 if (backend_fd >= 0)
1388 close (backend_fd); 2838 close (backend_fd);
1389 2839
2840#if EV_USE_IOCP
2841 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
2842#endif
1390#if EV_USE_PORT 2843#if EV_USE_PORT
1391 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 2844 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1392#endif 2845#endif
1393#if EV_USE_KQUEUE 2846#if EV_USE_KQUEUE
1394 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 2847 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A);
… …
1409#if EV_IDLE_ENABLE 2862#if EV_IDLE_ENABLE
1410 array_free (idle, [i]); 2863 array_free (idle, [i]);
1411#endif 2864#endif
1412 } 2865 }
1413 2866
1414 ev_free (anfds); anfdmax = 0; 2867 ev_free (anfds); anfds = 0; anfdmax = 0;
1415 2868
1416 /* have to use the microsoft-never-gets-it-right macro */ 2869 /* have to use the microsoft-never-gets-it-right macro */
2870 array_free (rfeed, EMPTY);
1417 array_free (fdchange, EMPTY); 2871 array_free (fdchange, EMPTY);
1418 array_free (timer, EMPTY); 2872 array_free (timer, EMPTY);
1419#if EV_PERIODIC_ENABLE 2873#if EV_PERIODIC_ENABLE
1420 array_free (periodic, EMPTY); 2874 array_free (periodic, EMPTY);
1421#endif 2875#endif
1422#if EV_FORK_ENABLE 2876#if EV_FORK_ENABLE
1423 array_free (fork, EMPTY); 2877 array_free (fork, EMPTY);
1424#endif 2878#endif
2879#if EV_CLEANUP_ENABLE
2880 array_free (cleanup, EMPTY);
2881#endif
1425 array_free (prepare, EMPTY); 2882 array_free (prepare, EMPTY);
1426 array_free (check, EMPTY); 2883 array_free (check, EMPTY);
1427#if EV_ASYNC_ENABLE 2884#if EV_ASYNC_ENABLE
1428 array_free (async, EMPTY); 2885 array_free (async, EMPTY);
1429#endif 2886#endif
1430 2887
1431 backend = 0; 2888 backend = 0;
2889
2890#if EV_MULTIPLICITY
2891 if (ev_is_default_loop (EV_A))
2892#endif
2893 ev_default_loop_ptr = 0;
2894#if EV_MULTIPLICITY
2895 else
2896 ev_free (EV_A);
2897#endif
1432} 2898}
1433 2899
1434#if EV_USE_INOTIFY 2900#if EV_USE_INOTIFY
1435void inline_size infy_fork (EV_P); 2901inline_size void infy_fork (EV_P);
1436#endif 2902#endif
1437 2903
1438void inline_size 2904inline_size void
1439loop_fork (EV_P) 2905loop_fork (EV_P)
1440{ 2906{
1441#if EV_USE_PORT 2907#if EV_USE_PORT
1442 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 2908 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1443#endif 2909#endif
… …
1449#endif 2915#endif
1450#if EV_USE_INOTIFY 2916#if EV_USE_INOTIFY
1451 infy_fork (EV_A); 2917 infy_fork (EV_A);
1452#endif 2918#endif
1453 2919
2920#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1454 if (ev_is_active (&pipeev)) 2921 if (ev_is_active (&pipe_w))
1455 { 2922 {
1456 /* this "locks" the handlers against writing to the pipe */ 2923 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1457 /* while we modify the fd vars */
1458 gotsig = 1;
1459#if EV_ASYNC_ENABLE
1460 gotasync = 1;
1461#endif
1462 2924
1463 ev_ref (EV_A); 2925 ev_ref (EV_A);
1464 ev_io_stop (EV_A_ &pipeev); 2926 ev_io_stop (EV_A_ &pipe_w);
1465
1466#if EV_USE_EVENTFD
1467 if (evfd >= 0)
1468 close (evfd);
1469#endif
1470 2927
1471 if (evpipe [0] >= 0) 2928 if (evpipe [0] >= 0)
1472 { 2929 EV_WIN32_CLOSE_FD (evpipe [0]);
1473 close (evpipe [0]);
1474 close (evpipe [1]);
1475 }
1476 2930
1477 evpipe_init (EV_A); 2931 evpipe_init (EV_A);
1478 /* now iterate over everything, in case we missed something */ 2932 /* iterate over everything, in case we missed something before */
1479 pipecb (EV_A_ &pipeev, EV_READ); 2933 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1480 } 2934 }
2935#endif
1481 2936
1482 postfork = 0; 2937 postfork = 0;
1483} 2938}
1484 2939
1485#if EV_MULTIPLICITY 2940#if EV_MULTIPLICITY
1486 2941
1487struct ev_loop * 2942struct ev_loop * ecb_cold
1488ev_loop_new (unsigned int flags) 2943ev_loop_new (unsigned int flags) EV_THROW
1489{ 2944{
1490 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 2945 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1491 2946
1492 memset (loop, 0, sizeof (struct ev_loop)); 2947 memset (EV_A, 0, sizeof (struct ev_loop));
1493
1494 loop_init (EV_A_ flags); 2948 loop_init (EV_A_ flags);
1495 2949
1496 if (ev_backend (EV_A)) 2950 if (ev_backend (EV_A))
1497 return loop; 2951 return EV_A;
1498 2952
2953 ev_free (EV_A);
1499 return 0; 2954 return 0;
1500} 2955}
1501 2956
1502void 2957#endif /* multiplicity */
1503ev_loop_destroy (EV_P)
1504{
1505 loop_destroy (EV_A);
1506 ev_free (loop);
1507}
1508
1509void
1510ev_loop_fork (EV_P)
1511{
1512 postfork = 1; /* must be in line with ev_default_fork */
1513}
1514 2958
1515#if EV_VERIFY 2959#if EV_VERIFY
1516static void noinline 2960static void noinline ecb_cold
1517verify_watcher (EV_P_ W w) 2961verify_watcher (EV_P_ W w)
1518{ 2962{
1519 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 2963 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1520 2964
1521 if (w->pending) 2965 if (w->pending)
1522 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 2966 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1523} 2967}
1524 2968
1525static void noinline 2969static void noinline ecb_cold
1526verify_heap (EV_P_ ANHE *heap, int N) 2970verify_heap (EV_P_ ANHE *heap, int N)
1527{ 2971{
1528 int i; 2972 int i;
1529 2973
1530 for (i = HEAP0; i < N + HEAP0; ++i) 2974 for (i = HEAP0; i < N + HEAP0; ++i)
1531 { 2975 {
1532 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i)); 2976 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
1533 assert (("heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i]))); 2977 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
1534 assert (("heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i])))); 2978 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1535 2979
1536 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 2980 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1537 } 2981 }
1538} 2982}
1539 2983
1540static void noinline 2984static void noinline ecb_cold
1541array_verify (EV_P_ W *ws, int cnt) 2985array_verify (EV_P_ W *ws, int cnt)
1542{ 2986{
1543 while (cnt--) 2987 while (cnt--)
1544 { 2988 {
1545 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 2989 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1546 verify_watcher (EV_A_ ws [cnt]); 2990 verify_watcher (EV_A_ ws [cnt]);
1547 } 2991 }
1548} 2992}
1549#endif 2993#endif
1550 2994
1551void 2995#if EV_FEATURE_API
1552ev_loop_verify (EV_P) 2996void ecb_cold
2997ev_verify (EV_P) EV_THROW
1553{ 2998{
1554#if EV_VERIFY 2999#if EV_VERIFY
1555 int i; 3000 int i;
1556 WL w; 3001 WL w, w2;
1557 3002
1558 assert (activecnt >= -1); 3003 assert (activecnt >= -1);
1559 3004
1560 assert (fdchangemax >= fdchangecnt); 3005 assert (fdchangemax >= fdchangecnt);
1561 for (i = 0; i < fdchangecnt; ++i) 3006 for (i = 0; i < fdchangecnt; ++i)
1562 assert (("negative fd in fdchanges", fdchanges [i] >= 0)); 3007 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1563 3008
1564 assert (anfdmax >= 0); 3009 assert (anfdmax >= 0);
1565 for (i = 0; i < anfdmax; ++i) 3010 for (i = 0; i < anfdmax; ++i)
3011 {
3012 int j = 0;
3013
1566 for (w = anfds [i].head; w; w = w->next) 3014 for (w = w2 = anfds [i].head; w; w = w->next)
1567 { 3015 {
1568 verify_watcher (EV_A_ (W)w); 3016 verify_watcher (EV_A_ (W)w);
3017
3018 if (j++ & 1)
3019 {
3020 assert (("libev: io watcher list contains a loop", w != w2));
3021 w2 = w2->next;
3022 }
3023
1569 assert (("inactive fd watcher on anfd list", ev_active (w) == 1)); 3024 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1570 assert (("fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3025 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1571 } 3026 }
3027 }
1572 3028
1573 assert (timermax >= timercnt); 3029 assert (timermax >= timercnt);
1574 verify_heap (EV_A_ timers, timercnt); 3030 verify_heap (EV_A_ timers, timercnt);
1575 3031
1576#if EV_PERIODIC_ENABLE 3032#if EV_PERIODIC_ENABLE
… …
1591#if EV_FORK_ENABLE 3047#if EV_FORK_ENABLE
1592 assert (forkmax >= forkcnt); 3048 assert (forkmax >= forkcnt);
1593 array_verify (EV_A_ (W *)forks, forkcnt); 3049 array_verify (EV_A_ (W *)forks, forkcnt);
1594#endif 3050#endif
1595 3051
3052#if EV_CLEANUP_ENABLE
3053 assert (cleanupmax >= cleanupcnt);
3054 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3055#endif
3056
1596#if EV_ASYNC_ENABLE 3057#if EV_ASYNC_ENABLE
1597 assert (asyncmax >= asynccnt); 3058 assert (asyncmax >= asynccnt);
1598 array_verify (EV_A_ (W *)asyncs, asynccnt); 3059 array_verify (EV_A_ (W *)asyncs, asynccnt);
1599#endif 3060#endif
1600 3061
3062#if EV_PREPARE_ENABLE
1601 assert (preparemax >= preparecnt); 3063 assert (preparemax >= preparecnt);
1602 array_verify (EV_A_ (W *)prepares, preparecnt); 3064 array_verify (EV_A_ (W *)prepares, preparecnt);
3065#endif
1603 3066
3067#if EV_CHECK_ENABLE
1604 assert (checkmax >= checkcnt); 3068 assert (checkmax >= checkcnt);
1605 array_verify (EV_A_ (W *)checks, checkcnt); 3069 array_verify (EV_A_ (W *)checks, checkcnt);
3070#endif
1606 3071
1607# if 0 3072# if 0
3073#if EV_CHILD_ENABLE
1608 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 3074 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1609 for (signum = signalmax; signum--; ) if (signals [signum].gotsig) 3075 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3076#endif
1610# endif 3077# endif
1611#endif 3078#endif
1612} 3079}
1613 3080#endif
1614#endif /* multiplicity */
1615 3081
1616#if EV_MULTIPLICITY 3082#if EV_MULTIPLICITY
1617struct ev_loop * 3083struct ev_loop * ecb_cold
1618ev_default_loop_init (unsigned int flags)
1619#else 3084#else
1620int 3085int
3086#endif
1621ev_default_loop (unsigned int flags) 3087ev_default_loop (unsigned int flags) EV_THROW
1622#endif
1623{ 3088{
1624 if (!ev_default_loop_ptr) 3089 if (!ev_default_loop_ptr)
1625 { 3090 {
1626#if EV_MULTIPLICITY 3091#if EV_MULTIPLICITY
1627 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 3092 EV_P = ev_default_loop_ptr = &default_loop_struct;
1628#else 3093#else
1629 ev_default_loop_ptr = 1; 3094 ev_default_loop_ptr = 1;
1630#endif 3095#endif
1631 3096
1632 loop_init (EV_A_ flags); 3097 loop_init (EV_A_ flags);
1633 3098
1634 if (ev_backend (EV_A)) 3099 if (ev_backend (EV_A))
1635 { 3100 {
1636#ifndef _WIN32 3101#if EV_CHILD_ENABLE
1637 ev_signal_init (&childev, childcb, SIGCHLD); 3102 ev_signal_init (&childev, childcb, SIGCHLD);
1638 ev_set_priority (&childev, EV_MAXPRI); 3103 ev_set_priority (&childev, EV_MAXPRI);
1639 ev_signal_start (EV_A_ &childev); 3104 ev_signal_start (EV_A_ &childev);
1640 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3105 ev_unref (EV_A); /* child watcher should not keep loop alive */
1641#endif 3106#endif
… …
1646 3111
1647 return ev_default_loop_ptr; 3112 return ev_default_loop_ptr;
1648} 3113}
1649 3114
1650void 3115void
1651ev_default_destroy (void) 3116ev_loop_fork (EV_P) EV_THROW
1652{ 3117{
1653#if EV_MULTIPLICITY 3118 postfork = 1;
1654 struct ev_loop *loop = ev_default_loop_ptr;
1655#endif
1656
1657#ifndef _WIN32
1658 ev_ref (EV_A); /* child watcher */
1659 ev_signal_stop (EV_A_ &childev);
1660#endif
1661
1662 loop_destroy (EV_A);
1663}
1664
1665void
1666ev_default_fork (void)
1667{
1668#if EV_MULTIPLICITY
1669 struct ev_loop *loop = ev_default_loop_ptr;
1670#endif
1671
1672 if (backend)
1673 postfork = 1; /* must be in line with ev_loop_fork */
1674} 3119}
1675 3120
1676/*****************************************************************************/ 3121/*****************************************************************************/
1677 3122
1678void 3123void
1679ev_invoke (EV_P_ void *w, int revents) 3124ev_invoke (EV_P_ void *w, int revents)
1680{ 3125{
1681 EV_CB_INVOKE ((W)w, revents); 3126 EV_CB_INVOKE ((W)w, revents);
1682} 3127}
1683 3128
1684void inline_speed 3129unsigned int
1685call_pending (EV_P) 3130ev_pending_count (EV_P) EV_THROW
1686{ 3131{
1687 int pri; 3132 int pri;
3133 unsigned int count = 0;
1688 3134
1689 for (pri = NUMPRI; pri--; ) 3135 for (pri = NUMPRI; pri--; )
3136 count += pendingcnt [pri];
3137
3138 return count;
3139}
3140
3141void noinline
3142ev_invoke_pending (EV_P)
3143{
3144 pendingpri = NUMPRI;
3145
3146 while (pendingpri) /* pendingpri possibly gets modified in the inner loop */
3147 {
3148 --pendingpri;
3149
1690 while (pendingcnt [pri]) 3150 while (pendingcnt [pendingpri])
1691 {
1692 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1693
1694 if (expect_true (p->w))
1695 { 3151 {
1696 /*assert (("non-pending watcher on pending list", p->w->pending));*/ 3152 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1697 3153
1698 p->w->pending = 0; 3154 p->w->pending = 0;
1699 EV_CB_INVOKE (p->w, p->events); 3155 EV_CB_INVOKE (p->w, p->events);
1700 EV_FREQUENT_CHECK; 3156 EV_FREQUENT_CHECK;
1701 } 3157 }
1702 } 3158 }
1703} 3159}
1704 3160
1705#if EV_IDLE_ENABLE 3161#if EV_IDLE_ENABLE
1706void inline_size 3162/* make idle watchers pending. this handles the "call-idle */
3163/* only when higher priorities are idle" logic */
3164inline_size void
1707idle_reify (EV_P) 3165idle_reify (EV_P)
1708{ 3166{
1709 if (expect_false (idleall)) 3167 if (expect_false (idleall))
1710 { 3168 {
1711 int pri; 3169 int pri;
… …
1723 } 3181 }
1724 } 3182 }
1725} 3183}
1726#endif 3184#endif
1727 3185
1728void inline_size 3186/* make timers pending */
3187inline_size void
1729timers_reify (EV_P) 3188timers_reify (EV_P)
1730{ 3189{
1731 EV_FREQUENT_CHECK; 3190 EV_FREQUENT_CHECK;
1732 3191
1733 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now) 3192 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1734 { 3193 {
1735 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]); 3194 do
1736
1737 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1738
1739 /* first reschedule or stop timer */
1740 if (w->repeat)
1741 { 3195 {
3196 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
3197
3198 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
3199
3200 /* first reschedule or stop timer */
3201 if (w->repeat)
3202 {
1742 ev_at (w) += w->repeat; 3203 ev_at (w) += w->repeat;
1743 if (ev_at (w) < mn_now) 3204 if (ev_at (w) < mn_now)
1744 ev_at (w) = mn_now; 3205 ev_at (w) = mn_now;
1745 3206
1746 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3207 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1747 3208
1748 ANHE_at_cache (timers [HEAP0]); 3209 ANHE_at_cache (timers [HEAP0]);
1749 downheap (timers, timercnt, HEAP0); 3210 downheap (timers, timercnt, HEAP0);
3211 }
3212 else
3213 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
3214
3215 EV_FREQUENT_CHECK;
3216 feed_reverse (EV_A_ (W)w);
1750 } 3217 }
1751 else 3218 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1752 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1753 3219
1754 EV_FREQUENT_CHECK; 3220 feed_reverse_done (EV_A_ EV_TIMER);
1755 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1756 } 3221 }
1757} 3222}
1758 3223
1759#if EV_PERIODIC_ENABLE 3224#if EV_PERIODIC_ENABLE
1760void inline_size 3225
3226static void noinline
3227periodic_recalc (EV_P_ ev_periodic *w)
3228{
3229 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3230 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3231
3232 /* the above almost always errs on the low side */
3233 while (at <= ev_rt_now)
3234 {
3235 ev_tstamp nat = at + w->interval;
3236
3237 /* when resolution fails us, we use ev_rt_now */
3238 if (expect_false (nat == at))
3239 {
3240 at = ev_rt_now;
3241 break;
3242 }
3243
3244 at = nat;
3245 }
3246
3247 ev_at (w) = at;
3248}
3249
3250/* make periodics pending */
3251inline_size void
1761periodics_reify (EV_P) 3252periodics_reify (EV_P)
1762{ 3253{
1763 EV_FREQUENT_CHECK; 3254 EV_FREQUENT_CHECK;
1764 3255
1765 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3256 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1766 { 3257 {
1767 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3258 do
1768
1769 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1770
1771 /* first reschedule or stop timer */
1772 if (w->reschedule_cb)
1773 { 3259 {
3260 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
3261
3262 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
3263
3264 /* first reschedule or stop timer */
3265 if (w->reschedule_cb)
3266 {
1774 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3267 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1775 3268
1776 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now)); 3269 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1777 3270
1778 ANHE_at_cache (periodics [HEAP0]); 3271 ANHE_at_cache (periodics [HEAP0]);
1779 downheap (periodics, periodiccnt, HEAP0); 3272 downheap (periodics, periodiccnt, HEAP0);
3273 }
3274 else if (w->interval)
3275 {
3276 periodic_recalc (EV_A_ w);
3277 ANHE_at_cache (periodics [HEAP0]);
3278 downheap (periodics, periodiccnt, HEAP0);
3279 }
3280 else
3281 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
3282
3283 EV_FREQUENT_CHECK;
3284 feed_reverse (EV_A_ (W)w);
1780 } 3285 }
1781 else if (w->interval) 3286 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
1782 {
1783 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1784 /* if next trigger time is not sufficiently in the future, put it there */
1785 /* this might happen because of floating point inexactness */
1786 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
1787 {
1788 ev_at (w) += w->interval;
1789 3287
1790 /* if interval is unreasonably low we might still have a time in the past */
1791 /* so correct this. this will make the periodic very inexact, but the user */
1792 /* has effectively asked to get triggered more often than possible */
1793 if (ev_at (w) < ev_rt_now)
1794 ev_at (w) = ev_rt_now;
1795 }
1796
1797 ANHE_at_cache (periodics [HEAP0]);
1798 downheap (periodics, periodiccnt, HEAP0);
1799 }
1800 else
1801 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1802
1803 EV_FREQUENT_CHECK;
1804 ev_feed_event (EV_A_ (W)w, EV_PERIODIC); 3288 feed_reverse_done (EV_A_ EV_PERIODIC);
1805 } 3289 }
1806} 3290}
1807 3291
3292/* simply recalculate all periodics */
3293/* TODO: maybe ensure that at least one event happens when jumping forward? */
1808static void noinline 3294static void noinline ecb_cold
1809periodics_reschedule (EV_P) 3295periodics_reschedule (EV_P)
1810{ 3296{
1811 int i; 3297 int i;
1812 3298
1813 /* adjust periodics after time jump */ 3299 /* adjust periodics after time jump */
… …
1816 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3302 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1817 3303
1818 if (w->reschedule_cb) 3304 if (w->reschedule_cb)
1819 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3305 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1820 else if (w->interval) 3306 else if (w->interval)
1821 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3307 periodic_recalc (EV_A_ w);
1822 3308
1823 ANHE_at_cache (periodics [i]); 3309 ANHE_at_cache (periodics [i]);
1824 } 3310 }
1825 3311
1826 reheap (periodics, periodiccnt); 3312 reheap (periodics, periodiccnt);
1827} 3313}
1828#endif 3314#endif
1829 3315
1830void inline_speed 3316/* adjust all timers by a given offset */
3317static void noinline ecb_cold
3318timers_reschedule (EV_P_ ev_tstamp adjust)
3319{
3320 int i;
3321
3322 for (i = 0; i < timercnt; ++i)
3323 {
3324 ANHE *he = timers + i + HEAP0;
3325 ANHE_w (*he)->at += adjust;
3326 ANHE_at_cache (*he);
3327 }
3328}
3329
3330/* fetch new monotonic and realtime times from the kernel */
3331/* also detect if there was a timejump, and act accordingly */
3332inline_speed void
1831time_update (EV_P_ ev_tstamp max_block) 3333time_update (EV_P_ ev_tstamp max_block)
1832{ 3334{
1833 int i;
1834
1835#if EV_USE_MONOTONIC 3335#if EV_USE_MONOTONIC
1836 if (expect_true (have_monotonic)) 3336 if (expect_true (have_monotonic))
1837 { 3337 {
3338 int i;
1838 ev_tstamp odiff = rtmn_diff; 3339 ev_tstamp odiff = rtmn_diff;
1839 3340
1840 mn_now = get_clock (); 3341 mn_now = get_clock ();
1841 3342
1842 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3343 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1858 * doesn't hurt either as we only do this on time-jumps or 3359 * doesn't hurt either as we only do this on time-jumps or
1859 * in the unlikely event of having been preempted here. 3360 * in the unlikely event of having been preempted here.
1860 */ 3361 */
1861 for (i = 4; --i; ) 3362 for (i = 4; --i; )
1862 { 3363 {
3364 ev_tstamp diff;
1863 rtmn_diff = ev_rt_now - mn_now; 3365 rtmn_diff = ev_rt_now - mn_now;
1864 3366
3367 diff = odiff - rtmn_diff;
3368
1865 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3369 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1866 return; /* all is well */ 3370 return; /* all is well */
1867 3371
1868 ev_rt_now = ev_time (); 3372 ev_rt_now = ev_time ();
1869 mn_now = get_clock (); 3373 mn_now = get_clock ();
1870 now_floor = mn_now; 3374 now_floor = mn_now;
1871 } 3375 }
1872 3376
3377 /* no timer adjustment, as the monotonic clock doesn't jump */
3378 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1873# if EV_PERIODIC_ENABLE 3379# if EV_PERIODIC_ENABLE
1874 periodics_reschedule (EV_A); 3380 periodics_reschedule (EV_A);
1875# endif 3381# endif
1876 /* no timer adjustment, as the monotonic clock doesn't jump */
1877 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1878 } 3382 }
1879 else 3383 else
1880#endif 3384#endif
1881 { 3385 {
1882 ev_rt_now = ev_time (); 3386 ev_rt_now = ev_time ();
1883 3387
1884 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 3388 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1885 { 3389 {
3390 /* adjust timers. this is easy, as the offset is the same for all of them */
3391 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1886#if EV_PERIODIC_ENABLE 3392#if EV_PERIODIC_ENABLE
1887 periodics_reschedule (EV_A); 3393 periodics_reschedule (EV_A);
1888#endif 3394#endif
1889 /* adjust timers. this is easy, as the offset is the same for all of them */
1890 for (i = 0; i < timercnt; ++i)
1891 {
1892 ANHE *he = timers + i + HEAP0;
1893 ANHE_w (*he)->at += ev_rt_now - mn_now;
1894 ANHE_at_cache (*he);
1895 }
1896 } 3395 }
1897 3396
1898 mn_now = ev_rt_now; 3397 mn_now = ev_rt_now;
1899 } 3398 }
1900} 3399}
1901 3400
1902void 3401int
1903ev_ref (EV_P)
1904{
1905 ++activecnt;
1906}
1907
1908void
1909ev_unref (EV_P)
1910{
1911 --activecnt;
1912}
1913
1914void
1915ev_now_update (EV_P)
1916{
1917 time_update (EV_A_ 1e100);
1918}
1919
1920static int loop_done;
1921
1922void
1923ev_loop (EV_P_ int flags) 3402ev_run (EV_P_ int flags)
1924{ 3403{
3404#if EV_FEATURE_API
3405 ++loop_depth;
3406#endif
3407
3408 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3409
1925 loop_done = EVUNLOOP_CANCEL; 3410 loop_done = EVBREAK_CANCEL;
1926 3411
1927 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 3412 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1928 3413
1929 do 3414 do
1930 { 3415 {
1931#if EV_VERIFY >= 2 3416#if EV_VERIFY >= 2
1932 ev_loop_verify (EV_A); 3417 ev_verify (EV_A);
1933#endif 3418#endif
1934 3419
1935#ifndef _WIN32 3420#ifndef _WIN32
1936 if (expect_false (curpid)) /* penalise the forking check even more */ 3421 if (expect_false (curpid)) /* penalise the forking check even more */
1937 if (expect_false (getpid () != curpid)) 3422 if (expect_false (getpid () != curpid))
… …
1945 /* we might have forked, so queue fork handlers */ 3430 /* we might have forked, so queue fork handlers */
1946 if (expect_false (postfork)) 3431 if (expect_false (postfork))
1947 if (forkcnt) 3432 if (forkcnt)
1948 { 3433 {
1949 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3434 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1950 call_pending (EV_A); 3435 EV_INVOKE_PENDING;
1951 } 3436 }
1952#endif 3437#endif
1953 3438
3439#if EV_PREPARE_ENABLE
1954 /* queue prepare watchers (and execute them) */ 3440 /* queue prepare watchers (and execute them) */
1955 if (expect_false (preparecnt)) 3441 if (expect_false (preparecnt))
1956 { 3442 {
1957 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3443 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1958 call_pending (EV_A); 3444 EV_INVOKE_PENDING;
1959 } 3445 }
3446#endif
1960 3447
1961 if (expect_false (!activecnt)) 3448 if (expect_false (loop_done))
1962 break; 3449 break;
1963 3450
1964 /* we might have forked, so reify kernel state if necessary */ 3451 /* we might have forked, so reify kernel state if necessary */
1965 if (expect_false (postfork)) 3452 if (expect_false (postfork))
1966 loop_fork (EV_A); 3453 loop_fork (EV_A);
… …
1971 /* calculate blocking time */ 3458 /* calculate blocking time */
1972 { 3459 {
1973 ev_tstamp waittime = 0.; 3460 ev_tstamp waittime = 0.;
1974 ev_tstamp sleeptime = 0.; 3461 ev_tstamp sleeptime = 0.;
1975 3462
3463 /* remember old timestamp for io_blocktime calculation */
3464 ev_tstamp prev_mn_now = mn_now;
3465
3466 /* update time to cancel out callback processing overhead */
3467 time_update (EV_A_ 1e100);
3468
3469 /* from now on, we want a pipe-wake-up */
3470 pipe_write_wanted = 1;
3471
3472 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3473
1976 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3474 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1977 { 3475 {
1978 /* update time to cancel out callback processing overhead */
1979 time_update (EV_A_ 1e100);
1980
1981 waittime = MAX_BLOCKTIME; 3476 waittime = MAX_BLOCKTIME;
1982 3477
1983 if (timercnt) 3478 if (timercnt)
1984 { 3479 {
1985 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3480 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1986 if (waittime > to) waittime = to; 3481 if (waittime > to) waittime = to;
1987 } 3482 }
1988 3483
1989#if EV_PERIODIC_ENABLE 3484#if EV_PERIODIC_ENABLE
1990 if (periodiccnt) 3485 if (periodiccnt)
1991 { 3486 {
1992 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3487 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1993 if (waittime > to) waittime = to; 3488 if (waittime > to) waittime = to;
1994 } 3489 }
1995#endif 3490#endif
1996 3491
3492 /* don't let timeouts decrease the waittime below timeout_blocktime */
1997 if (expect_false (waittime < timeout_blocktime)) 3493 if (expect_false (waittime < timeout_blocktime))
1998 waittime = timeout_blocktime; 3494 waittime = timeout_blocktime;
1999 3495
2000 sleeptime = waittime - backend_fudge; 3496 /* at this point, we NEED to wait, so we have to ensure */
3497 /* to pass a minimum nonzero value to the backend */
3498 if (expect_false (waittime < backend_mintime))
3499 waittime = backend_mintime;
2001 3500
3501 /* extra check because io_blocktime is commonly 0 */
2002 if (expect_true (sleeptime > io_blocktime)) 3502 if (expect_false (io_blocktime))
2003 sleeptime = io_blocktime;
2004
2005 if (sleeptime)
2006 { 3503 {
3504 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3505
3506 if (sleeptime > waittime - backend_mintime)
3507 sleeptime = waittime - backend_mintime;
3508
3509 if (expect_true (sleeptime > 0.))
3510 {
2007 ev_sleep (sleeptime); 3511 ev_sleep (sleeptime);
2008 waittime -= sleeptime; 3512 waittime -= sleeptime;
3513 }
2009 } 3514 }
2010 } 3515 }
2011 3516
3517#if EV_FEATURE_API
2012 ++loop_count; 3518 ++loop_count;
3519#endif
3520 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2013 backend_poll (EV_A_ waittime); 3521 backend_poll (EV_A_ waittime);
3522 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3523
3524 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3525
3526 ECB_MEMORY_FENCE_ACQUIRE;
3527 if (pipe_write_skipped)
3528 {
3529 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3530 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3531 }
3532
2014 3533
2015 /* update ev_rt_now, do magic */ 3534 /* update ev_rt_now, do magic */
2016 time_update (EV_A_ waittime + sleeptime); 3535 time_update (EV_A_ waittime + sleeptime);
2017 } 3536 }
2018 3537
… …
2025#if EV_IDLE_ENABLE 3544#if EV_IDLE_ENABLE
2026 /* queue idle watchers unless other events are pending */ 3545 /* queue idle watchers unless other events are pending */
2027 idle_reify (EV_A); 3546 idle_reify (EV_A);
2028#endif 3547#endif
2029 3548
3549#if EV_CHECK_ENABLE
2030 /* queue check watchers, to be executed first */ 3550 /* queue check watchers, to be executed first */
2031 if (expect_false (checkcnt)) 3551 if (expect_false (checkcnt))
2032 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3552 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3553#endif
2033 3554
2034 call_pending (EV_A); 3555 EV_INVOKE_PENDING;
2035 } 3556 }
2036 while (expect_true ( 3557 while (expect_true (
2037 activecnt 3558 activecnt
2038 && !loop_done 3559 && !loop_done
2039 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3560 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2040 )); 3561 ));
2041 3562
2042 if (loop_done == EVUNLOOP_ONE) 3563 if (loop_done == EVBREAK_ONE)
2043 loop_done = EVUNLOOP_CANCEL; 3564 loop_done = EVBREAK_CANCEL;
3565
3566#if EV_FEATURE_API
3567 --loop_depth;
3568#endif
3569
3570 return activecnt;
2044} 3571}
2045 3572
2046void 3573void
2047ev_unloop (EV_P_ int how) 3574ev_break (EV_P_ int how) EV_THROW
2048{ 3575{
2049 loop_done = how; 3576 loop_done = how;
2050} 3577}
2051 3578
3579void
3580ev_ref (EV_P) EV_THROW
3581{
3582 ++activecnt;
3583}
3584
3585void
3586ev_unref (EV_P) EV_THROW
3587{
3588 --activecnt;
3589}
3590
3591void
3592ev_now_update (EV_P) EV_THROW
3593{
3594 time_update (EV_A_ 1e100);
3595}
3596
3597void
3598ev_suspend (EV_P) EV_THROW
3599{
3600 ev_now_update (EV_A);
3601}
3602
3603void
3604ev_resume (EV_P) EV_THROW
3605{
3606 ev_tstamp mn_prev = mn_now;
3607
3608 ev_now_update (EV_A);
3609 timers_reschedule (EV_A_ mn_now - mn_prev);
3610#if EV_PERIODIC_ENABLE
3611 /* TODO: really do this? */
3612 periodics_reschedule (EV_A);
3613#endif
3614}
3615
2052/*****************************************************************************/ 3616/*****************************************************************************/
3617/* singly-linked list management, used when the expected list length is short */
2053 3618
2054void inline_size 3619inline_size void
2055wlist_add (WL *head, WL elem) 3620wlist_add (WL *head, WL elem)
2056{ 3621{
2057 elem->next = *head; 3622 elem->next = *head;
2058 *head = elem; 3623 *head = elem;
2059} 3624}
2060 3625
2061void inline_size 3626inline_size void
2062wlist_del (WL *head, WL elem) 3627wlist_del (WL *head, WL elem)
2063{ 3628{
2064 while (*head) 3629 while (*head)
2065 { 3630 {
2066 if (*head == elem) 3631 if (expect_true (*head == elem))
2067 { 3632 {
2068 *head = elem->next; 3633 *head = elem->next;
2069 return; 3634 break;
2070 } 3635 }
2071 3636
2072 head = &(*head)->next; 3637 head = &(*head)->next;
2073 } 3638 }
2074} 3639}
2075 3640
2076void inline_speed 3641/* internal, faster, version of ev_clear_pending */
3642inline_speed void
2077clear_pending (EV_P_ W w) 3643clear_pending (EV_P_ W w)
2078{ 3644{
2079 if (w->pending) 3645 if (w->pending)
2080 { 3646 {
2081 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3647 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2082 w->pending = 0; 3648 w->pending = 0;
2083 } 3649 }
2084} 3650}
2085 3651
2086int 3652int
2087ev_clear_pending (EV_P_ void *w) 3653ev_clear_pending (EV_P_ void *w) EV_THROW
2088{ 3654{
2089 W w_ = (W)w; 3655 W w_ = (W)w;
2090 int pending = w_->pending; 3656 int pending = w_->pending;
2091 3657
2092 if (expect_true (pending)) 3658 if (expect_true (pending))
2093 { 3659 {
2094 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 3660 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3661 p->w = (W)&pending_w;
2095 w_->pending = 0; 3662 w_->pending = 0;
2096 p->w = 0;
2097 return p->events; 3663 return p->events;
2098 } 3664 }
2099 else 3665 else
2100 return 0; 3666 return 0;
2101} 3667}
2102 3668
2103void inline_size 3669inline_size void
2104pri_adjust (EV_P_ W w) 3670pri_adjust (EV_P_ W w)
2105{ 3671{
2106 int pri = w->priority; 3672 int pri = ev_priority (w);
2107 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3673 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2108 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3674 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2109 w->priority = pri; 3675 ev_set_priority (w, pri);
2110} 3676}
2111 3677
2112void inline_speed 3678inline_speed void
2113ev_start (EV_P_ W w, int active) 3679ev_start (EV_P_ W w, int active)
2114{ 3680{
2115 pri_adjust (EV_A_ w); 3681 pri_adjust (EV_A_ w);
2116 w->active = active; 3682 w->active = active;
2117 ev_ref (EV_A); 3683 ev_ref (EV_A);
2118} 3684}
2119 3685
2120void inline_size 3686inline_size void
2121ev_stop (EV_P_ W w) 3687ev_stop (EV_P_ W w)
2122{ 3688{
2123 ev_unref (EV_A); 3689 ev_unref (EV_A);
2124 w->active = 0; 3690 w->active = 0;
2125} 3691}
2126 3692
2127/*****************************************************************************/ 3693/*****************************************************************************/
2128 3694
2129void noinline 3695void noinline
2130ev_io_start (EV_P_ ev_io *w) 3696ev_io_start (EV_P_ ev_io *w) EV_THROW
2131{ 3697{
2132 int fd = w->fd; 3698 int fd = w->fd;
2133 3699
2134 if (expect_false (ev_is_active (w))) 3700 if (expect_false (ev_is_active (w)))
2135 return; 3701 return;
2136 3702
2137 assert (("ev_io_start called with negative fd", fd >= 0)); 3703 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3704 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2138 3705
2139 EV_FREQUENT_CHECK; 3706 EV_FREQUENT_CHECK;
2140 3707
2141 ev_start (EV_A_ (W)w, 1); 3708 ev_start (EV_A_ (W)w, 1);
2142 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3709 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero);
2143 wlist_add (&anfds[fd].head, (WL)w); 3710 wlist_add (&anfds[fd].head, (WL)w);
2144 3711
3712 /* common bug, apparently */
3713 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3714
2145 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 3715 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2146 w->events &= ~EV_IOFDSET; 3716 w->events &= ~EV__IOFDSET;
2147 3717
2148 EV_FREQUENT_CHECK; 3718 EV_FREQUENT_CHECK;
2149} 3719}
2150 3720
2151void noinline 3721void noinline
2152ev_io_stop (EV_P_ ev_io *w) 3722ev_io_stop (EV_P_ ev_io *w) EV_THROW
2153{ 3723{
2154 clear_pending (EV_A_ (W)w); 3724 clear_pending (EV_A_ (W)w);
2155 if (expect_false (!ev_is_active (w))) 3725 if (expect_false (!ev_is_active (w)))
2156 return; 3726 return;
2157 3727
2158 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3728 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2159 3729
2160 EV_FREQUENT_CHECK; 3730 EV_FREQUENT_CHECK;
2161 3731
2162 wlist_del (&anfds[w->fd].head, (WL)w); 3732 wlist_del (&anfds[w->fd].head, (WL)w);
2163 ev_stop (EV_A_ (W)w); 3733 ev_stop (EV_A_ (W)w);
2164 3734
2165 fd_change (EV_A_ w->fd, 1); 3735 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2166 3736
2167 EV_FREQUENT_CHECK; 3737 EV_FREQUENT_CHECK;
2168} 3738}
2169 3739
2170void noinline 3740void noinline
2171ev_timer_start (EV_P_ ev_timer *w) 3741ev_timer_start (EV_P_ ev_timer *w) EV_THROW
2172{ 3742{
2173 if (expect_false (ev_is_active (w))) 3743 if (expect_false (ev_is_active (w)))
2174 return; 3744 return;
2175 3745
2176 ev_at (w) += mn_now; 3746 ev_at (w) += mn_now;
2177 3747
2178 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3748 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2179 3749
2180 EV_FREQUENT_CHECK; 3750 EV_FREQUENT_CHECK;
2181 3751
2182 ++timercnt; 3752 ++timercnt;
2183 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 3753 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
… …
2186 ANHE_at_cache (timers [ev_active (w)]); 3756 ANHE_at_cache (timers [ev_active (w)]);
2187 upheap (timers, ev_active (w)); 3757 upheap (timers, ev_active (w));
2188 3758
2189 EV_FREQUENT_CHECK; 3759 EV_FREQUENT_CHECK;
2190 3760
2191 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3761 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2192} 3762}
2193 3763
2194void noinline 3764void noinline
2195ev_timer_stop (EV_P_ ev_timer *w) 3765ev_timer_stop (EV_P_ ev_timer *w) EV_THROW
2196{ 3766{
2197 clear_pending (EV_A_ (W)w); 3767 clear_pending (EV_A_ (W)w);
2198 if (expect_false (!ev_is_active (w))) 3768 if (expect_false (!ev_is_active (w)))
2199 return; 3769 return;
2200 3770
2201 EV_FREQUENT_CHECK; 3771 EV_FREQUENT_CHECK;
2202 3772
2203 { 3773 {
2204 int active = ev_active (w); 3774 int active = ev_active (w);
2205 3775
2206 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); 3776 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2207 3777
2208 --timercnt; 3778 --timercnt;
2209 3779
2210 if (expect_true (active < timercnt + HEAP0)) 3780 if (expect_true (active < timercnt + HEAP0))
2211 { 3781 {
2212 timers [active] = timers [timercnt + HEAP0]; 3782 timers [active] = timers [timercnt + HEAP0];
2213 adjustheap (timers, timercnt, active); 3783 adjustheap (timers, timercnt, active);
2214 } 3784 }
2215 } 3785 }
2216 3786
2217 EV_FREQUENT_CHECK;
2218
2219 ev_at (w) -= mn_now; 3787 ev_at (w) -= mn_now;
2220 3788
2221 ev_stop (EV_A_ (W)w); 3789 ev_stop (EV_A_ (W)w);
3790
3791 EV_FREQUENT_CHECK;
2222} 3792}
2223 3793
2224void noinline 3794void noinline
2225ev_timer_again (EV_P_ ev_timer *w) 3795ev_timer_again (EV_P_ ev_timer *w) EV_THROW
2226{ 3796{
2227 EV_FREQUENT_CHECK; 3797 EV_FREQUENT_CHECK;
3798
3799 clear_pending (EV_A_ (W)w);
2228 3800
2229 if (ev_is_active (w)) 3801 if (ev_is_active (w))
2230 { 3802 {
2231 if (w->repeat) 3803 if (w->repeat)
2232 { 3804 {
… …
2244 } 3816 }
2245 3817
2246 EV_FREQUENT_CHECK; 3818 EV_FREQUENT_CHECK;
2247} 3819}
2248 3820
3821ev_tstamp
3822ev_timer_remaining (EV_P_ ev_timer *w) EV_THROW
3823{
3824 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
3825}
3826
2249#if EV_PERIODIC_ENABLE 3827#if EV_PERIODIC_ENABLE
2250void noinline 3828void noinline
2251ev_periodic_start (EV_P_ ev_periodic *w) 3829ev_periodic_start (EV_P_ ev_periodic *w) EV_THROW
2252{ 3830{
2253 if (expect_false (ev_is_active (w))) 3831 if (expect_false (ev_is_active (w)))
2254 return; 3832 return;
2255 3833
2256 if (w->reschedule_cb) 3834 if (w->reschedule_cb)
2257 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3835 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2258 else if (w->interval) 3836 else if (w->interval)
2259 { 3837 {
2260 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 3838 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2261 /* this formula differs from the one in periodic_reify because we do not always round up */ 3839 periodic_recalc (EV_A_ w);
2262 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2263 } 3840 }
2264 else 3841 else
2265 ev_at (w) = w->offset; 3842 ev_at (w) = w->offset;
2266 3843
2267 EV_FREQUENT_CHECK; 3844 EV_FREQUENT_CHECK;
… …
2273 ANHE_at_cache (periodics [ev_active (w)]); 3850 ANHE_at_cache (periodics [ev_active (w)]);
2274 upheap (periodics, ev_active (w)); 3851 upheap (periodics, ev_active (w));
2275 3852
2276 EV_FREQUENT_CHECK; 3853 EV_FREQUENT_CHECK;
2277 3854
2278 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 3855 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2279} 3856}
2280 3857
2281void noinline 3858void noinline
2282ev_periodic_stop (EV_P_ ev_periodic *w) 3859ev_periodic_stop (EV_P_ ev_periodic *w) EV_THROW
2283{ 3860{
2284 clear_pending (EV_A_ (W)w); 3861 clear_pending (EV_A_ (W)w);
2285 if (expect_false (!ev_is_active (w))) 3862 if (expect_false (!ev_is_active (w)))
2286 return; 3863 return;
2287 3864
2288 EV_FREQUENT_CHECK; 3865 EV_FREQUENT_CHECK;
2289 3866
2290 { 3867 {
2291 int active = ev_active (w); 3868 int active = ev_active (w);
2292 3869
2293 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); 3870 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2294 3871
2295 --periodiccnt; 3872 --periodiccnt;
2296 3873
2297 if (expect_true (active < periodiccnt + HEAP0)) 3874 if (expect_true (active < periodiccnt + HEAP0))
2298 { 3875 {
2299 periodics [active] = periodics [periodiccnt + HEAP0]; 3876 periodics [active] = periodics [periodiccnt + HEAP0];
2300 adjustheap (periodics, periodiccnt, active); 3877 adjustheap (periodics, periodiccnt, active);
2301 } 3878 }
2302 } 3879 }
2303 3880
2304 EV_FREQUENT_CHECK;
2305
2306 ev_stop (EV_A_ (W)w); 3881 ev_stop (EV_A_ (W)w);
3882
3883 EV_FREQUENT_CHECK;
2307} 3884}
2308 3885
2309void noinline 3886void noinline
2310ev_periodic_again (EV_P_ ev_periodic *w) 3887ev_periodic_again (EV_P_ ev_periodic *w) EV_THROW
2311{ 3888{
2312 /* TODO: use adjustheap and recalculation */ 3889 /* TODO: use adjustheap and recalculation */
2313 ev_periodic_stop (EV_A_ w); 3890 ev_periodic_stop (EV_A_ w);
2314 ev_periodic_start (EV_A_ w); 3891 ev_periodic_start (EV_A_ w);
2315} 3892}
… …
2317 3894
2318#ifndef SA_RESTART 3895#ifndef SA_RESTART
2319# define SA_RESTART 0 3896# define SA_RESTART 0
2320#endif 3897#endif
2321 3898
3899#if EV_SIGNAL_ENABLE
3900
2322void noinline 3901void noinline
2323ev_signal_start (EV_P_ ev_signal *w) 3902ev_signal_start (EV_P_ ev_signal *w) EV_THROW
2324{ 3903{
2325#if EV_MULTIPLICITY
2326 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2327#endif
2328 if (expect_false (ev_is_active (w))) 3904 if (expect_false (ev_is_active (w)))
2329 return; 3905 return;
2330 3906
2331 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 3907 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2332 3908
2333 evpipe_init (EV_A); 3909#if EV_MULTIPLICITY
3910 assert (("libev: a signal must not be attached to two different loops",
3911 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2334 3912
2335 EV_FREQUENT_CHECK; 3913 signals [w->signum - 1].loop = EV_A;
3914 ECB_MEMORY_FENCE_RELEASE;
3915#endif
2336 3916
3917 EV_FREQUENT_CHECK;
3918
3919#if EV_USE_SIGNALFD
3920 if (sigfd == -2)
2337 { 3921 {
2338#ifndef _WIN32 3922 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2339 sigset_t full, prev; 3923 if (sigfd < 0 && errno == EINVAL)
2340 sigfillset (&full); 3924 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2341 sigprocmask (SIG_SETMASK, &full, &prev);
2342#endif
2343 3925
2344 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 3926 if (sigfd >= 0)
3927 {
3928 fd_intern (sigfd); /* doing it twice will not hurt */
2345 3929
2346#ifndef _WIN32 3930 sigemptyset (&sigfd_set);
2347 sigprocmask (SIG_SETMASK, &prev, 0); 3931
2348#endif 3932 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
3933 ev_set_priority (&sigfd_w, EV_MAXPRI);
3934 ev_io_start (EV_A_ &sigfd_w);
3935 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
3936 }
2349 } 3937 }
3938
3939 if (sigfd >= 0)
3940 {
3941 /* TODO: check .head */
3942 sigaddset (&sigfd_set, w->signum);
3943 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
3944
3945 signalfd (sigfd, &sigfd_set, 0);
3946 }
3947#endif
2350 3948
2351 ev_start (EV_A_ (W)w, 1); 3949 ev_start (EV_A_ (W)w, 1);
2352 wlist_add (&signals [w->signum - 1].head, (WL)w); 3950 wlist_add (&signals [w->signum - 1].head, (WL)w);
2353 3951
2354 if (!((WL)w)->next) 3952 if (!((WL)w)->next)
3953# if EV_USE_SIGNALFD
3954 if (sigfd < 0) /*TODO*/
3955# endif
2355 { 3956 {
2356#if _WIN32 3957# ifdef _WIN32
3958 evpipe_init (EV_A);
3959
2357 signal (w->signum, ev_sighandler); 3960 signal (w->signum, ev_sighandler);
2358#else 3961# else
2359 struct sigaction sa; 3962 struct sigaction sa;
3963
3964 evpipe_init (EV_A);
3965
2360 sa.sa_handler = ev_sighandler; 3966 sa.sa_handler = ev_sighandler;
2361 sigfillset (&sa.sa_mask); 3967 sigfillset (&sa.sa_mask);
2362 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 3968 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2363 sigaction (w->signum, &sa, 0); 3969 sigaction (w->signum, &sa, 0);
3970
3971 if (origflags & EVFLAG_NOSIGMASK)
3972 {
3973 sigemptyset (&sa.sa_mask);
3974 sigaddset (&sa.sa_mask, w->signum);
3975 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
3976 }
2364#endif 3977#endif
2365 } 3978 }
2366 3979
2367 EV_FREQUENT_CHECK; 3980 EV_FREQUENT_CHECK;
2368} 3981}
2369 3982
2370void noinline 3983void noinline
2371ev_signal_stop (EV_P_ ev_signal *w) 3984ev_signal_stop (EV_P_ ev_signal *w) EV_THROW
2372{ 3985{
2373 clear_pending (EV_A_ (W)w); 3986 clear_pending (EV_A_ (W)w);
2374 if (expect_false (!ev_is_active (w))) 3987 if (expect_false (!ev_is_active (w)))
2375 return; 3988 return;
2376 3989
… …
2378 3991
2379 wlist_del (&signals [w->signum - 1].head, (WL)w); 3992 wlist_del (&signals [w->signum - 1].head, (WL)w);
2380 ev_stop (EV_A_ (W)w); 3993 ev_stop (EV_A_ (W)w);
2381 3994
2382 if (!signals [w->signum - 1].head) 3995 if (!signals [w->signum - 1].head)
3996 {
3997#if EV_MULTIPLICITY
3998 signals [w->signum - 1].loop = 0; /* unattach from signal */
3999#endif
4000#if EV_USE_SIGNALFD
4001 if (sigfd >= 0)
4002 {
4003 sigset_t ss;
4004
4005 sigemptyset (&ss);
4006 sigaddset (&ss, w->signum);
4007 sigdelset (&sigfd_set, w->signum);
4008
4009 signalfd (sigfd, &sigfd_set, 0);
4010 sigprocmask (SIG_UNBLOCK, &ss, 0);
4011 }
4012 else
4013#endif
2383 signal (w->signum, SIG_DFL); 4014 signal (w->signum, SIG_DFL);
4015 }
2384 4016
2385 EV_FREQUENT_CHECK; 4017 EV_FREQUENT_CHECK;
2386} 4018}
4019
4020#endif
4021
4022#if EV_CHILD_ENABLE
2387 4023
2388void 4024void
2389ev_child_start (EV_P_ ev_child *w) 4025ev_child_start (EV_P_ ev_child *w) EV_THROW
2390{ 4026{
2391#if EV_MULTIPLICITY 4027#if EV_MULTIPLICITY
2392 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4028 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2393#endif 4029#endif
2394 if (expect_false (ev_is_active (w))) 4030 if (expect_false (ev_is_active (w)))
2395 return; 4031 return;
2396 4032
2397 EV_FREQUENT_CHECK; 4033 EV_FREQUENT_CHECK;
2398 4034
2399 ev_start (EV_A_ (W)w, 1); 4035 ev_start (EV_A_ (W)w, 1);
2400 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4036 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2401 4037
2402 EV_FREQUENT_CHECK; 4038 EV_FREQUENT_CHECK;
2403} 4039}
2404 4040
2405void 4041void
2406ev_child_stop (EV_P_ ev_child *w) 4042ev_child_stop (EV_P_ ev_child *w) EV_THROW
2407{ 4043{
2408 clear_pending (EV_A_ (W)w); 4044 clear_pending (EV_A_ (W)w);
2409 if (expect_false (!ev_is_active (w))) 4045 if (expect_false (!ev_is_active (w)))
2410 return; 4046 return;
2411 4047
2412 EV_FREQUENT_CHECK; 4048 EV_FREQUENT_CHECK;
2413 4049
2414 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4050 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2415 ev_stop (EV_A_ (W)w); 4051 ev_stop (EV_A_ (W)w);
2416 4052
2417 EV_FREQUENT_CHECK; 4053 EV_FREQUENT_CHECK;
2418} 4054}
4055
4056#endif
2419 4057
2420#if EV_STAT_ENABLE 4058#if EV_STAT_ENABLE
2421 4059
2422# ifdef _WIN32 4060# ifdef _WIN32
2423# undef lstat 4061# undef lstat
2424# define lstat(a,b) _stati64 (a,b) 4062# define lstat(a,b) _stati64 (a,b)
2425# endif 4063# endif
2426 4064
2427#define DEF_STAT_INTERVAL 5.0074891 4065#define DEF_STAT_INTERVAL 5.0074891
4066#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2428#define MIN_STAT_INTERVAL 0.1074891 4067#define MIN_STAT_INTERVAL 0.1074891
2429 4068
2430static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4069static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2431 4070
2432#if EV_USE_INOTIFY 4071#if EV_USE_INOTIFY
2433# define EV_INOTIFY_BUFSIZE 8192 4072
4073/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
4074# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2434 4075
2435static void noinline 4076static void noinline
2436infy_add (EV_P_ ev_stat *w) 4077infy_add (EV_P_ ev_stat *w)
2437{ 4078{
2438 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); 4079 w->wd = inotify_add_watch (fs_fd, w->path,
4080 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4081 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4082 | IN_DONT_FOLLOW | IN_MASK_ADD);
2439 4083
2440 if (w->wd < 0) 4084 if (w->wd >= 0)
4085 {
4086 struct statfs sfs;
4087
4088 /* now local changes will be tracked by inotify, but remote changes won't */
4089 /* unless the filesystem is known to be local, we therefore still poll */
4090 /* also do poll on <2.6.25, but with normal frequency */
4091
4092 if (!fs_2625)
4093 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4094 else if (!statfs (w->path, &sfs)
4095 && (sfs.f_type == 0x1373 /* devfs */
4096 || sfs.f_type == 0x4006 /* fat */
4097 || sfs.f_type == 0x4d44 /* msdos */
4098 || sfs.f_type == 0xEF53 /* ext2/3 */
4099 || sfs.f_type == 0x72b6 /* jffs2 */
4100 || sfs.f_type == 0x858458f6 /* ramfs */
4101 || sfs.f_type == 0x5346544e /* ntfs */
4102 || sfs.f_type == 0x3153464a /* jfs */
4103 || sfs.f_type == 0x9123683e /* btrfs */
4104 || sfs.f_type == 0x52654973 /* reiser3 */
4105 || sfs.f_type == 0x01021994 /* tmpfs */
4106 || sfs.f_type == 0x58465342 /* xfs */))
4107 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4108 else
4109 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2441 { 4110 }
2442 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 4111 else
4112 {
4113 /* can't use inotify, continue to stat */
4114 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2443 4115
2444 /* monitor some parent directory for speedup hints */ 4116 /* if path is not there, monitor some parent directory for speedup hints */
2445 /* note that exceeding the hardcoded limit is not a correctness issue, */ 4117 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2446 /* but an efficiency issue only */ 4118 /* but an efficiency issue only */
2447 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 4119 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2448 { 4120 {
2449 char path [4096]; 4121 char path [4096];
2450 strcpy (path, w->path); 4122 strcpy (path, w->path);
… …
2454 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 4126 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2455 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 4127 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2456 4128
2457 char *pend = strrchr (path, '/'); 4129 char *pend = strrchr (path, '/');
2458 4130
2459 if (!pend) 4131 if (!pend || pend == path)
2460 break; /* whoops, no '/', complain to your admin */ 4132 break;
2461 4133
2462 *pend = 0; 4134 *pend = 0;
2463 w->wd = inotify_add_watch (fs_fd, path, mask); 4135 w->wd = inotify_add_watch (fs_fd, path, mask);
2464 } 4136 }
2465 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4137 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2466 } 4138 }
2467 } 4139 }
2468 else
2469 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2470 4140
2471 if (w->wd >= 0) 4141 if (w->wd >= 0)
2472 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4142 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
4143
4144 /* now re-arm timer, if required */
4145 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4146 ev_timer_again (EV_A_ &w->timer);
4147 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2473} 4148}
2474 4149
2475static void noinline 4150static void noinline
2476infy_del (EV_P_ ev_stat *w) 4151infy_del (EV_P_ ev_stat *w)
2477{ 4152{
… …
2480 4155
2481 if (wd < 0) 4156 if (wd < 0)
2482 return; 4157 return;
2483 4158
2484 w->wd = -2; 4159 w->wd = -2;
2485 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 4160 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2486 wlist_del (&fs_hash [slot].head, (WL)w); 4161 wlist_del (&fs_hash [slot].head, (WL)w);
2487 4162
2488 /* remove this watcher, if others are watching it, they will rearm */ 4163 /* remove this watcher, if others are watching it, they will rearm */
2489 inotify_rm_watch (fs_fd, wd); 4164 inotify_rm_watch (fs_fd, wd);
2490} 4165}
2491 4166
2492static void noinline 4167static void noinline
2493infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4168infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2494{ 4169{
2495 if (slot < 0) 4170 if (slot < 0)
2496 /* overflow, need to check for all hahs slots */ 4171 /* overflow, need to check for all hash slots */
2497 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4172 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2498 infy_wd (EV_A_ slot, wd, ev); 4173 infy_wd (EV_A_ slot, wd, ev);
2499 else 4174 else
2500 { 4175 {
2501 WL w_; 4176 WL w_;
2502 4177
2503 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 4178 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2504 { 4179 {
2505 ev_stat *w = (ev_stat *)w_; 4180 ev_stat *w = (ev_stat *)w_;
2506 w_ = w_->next; /* lets us remove this watcher and all before it */ 4181 w_ = w_->next; /* lets us remove this watcher and all before it */
2507 4182
2508 if (w->wd == wd || wd == -1) 4183 if (w->wd == wd || wd == -1)
2509 { 4184 {
2510 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 4185 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2511 { 4186 {
4187 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2512 w->wd = -1; 4188 w->wd = -1;
2513 infy_add (EV_A_ w); /* re-add, no matter what */ 4189 infy_add (EV_A_ w); /* re-add, no matter what */
2514 } 4190 }
2515 4191
2516 stat_timer_cb (EV_A_ &w->timer, 0); 4192 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2521 4197
2522static void 4198static void
2523infy_cb (EV_P_ ev_io *w, int revents) 4199infy_cb (EV_P_ ev_io *w, int revents)
2524{ 4200{
2525 char buf [EV_INOTIFY_BUFSIZE]; 4201 char buf [EV_INOTIFY_BUFSIZE];
2526 struct inotify_event *ev = (struct inotify_event *)buf;
2527 int ofs; 4202 int ofs;
2528 int len = read (fs_fd, buf, sizeof (buf)); 4203 int len = read (fs_fd, buf, sizeof (buf));
2529 4204
2530 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 4205 for (ofs = 0; ofs < len; )
4206 {
4207 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2531 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4208 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4209 ofs += sizeof (struct inotify_event) + ev->len;
4210 }
2532} 4211}
2533 4212
2534void inline_size 4213inline_size void ecb_cold
4214ev_check_2625 (EV_P)
4215{
4216 /* kernels < 2.6.25 are borked
4217 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4218 */
4219 if (ev_linux_version () < 0x020619)
4220 return;
4221
4222 fs_2625 = 1;
4223}
4224
4225inline_size int
4226infy_newfd (void)
4227{
4228#if defined IN_CLOEXEC && defined IN_NONBLOCK
4229 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4230 if (fd >= 0)
4231 return fd;
4232#endif
4233 return inotify_init ();
4234}
4235
4236inline_size void
2535infy_init (EV_P) 4237infy_init (EV_P)
2536{ 4238{
2537 if (fs_fd != -2) 4239 if (fs_fd != -2)
2538 return; 4240 return;
2539 4241
4242 fs_fd = -1;
4243
4244 ev_check_2625 (EV_A);
4245
2540 fs_fd = inotify_init (); 4246 fs_fd = infy_newfd ();
2541 4247
2542 if (fs_fd >= 0) 4248 if (fs_fd >= 0)
2543 { 4249 {
4250 fd_intern (fs_fd);
2544 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 4251 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2545 ev_set_priority (&fs_w, EV_MAXPRI); 4252 ev_set_priority (&fs_w, EV_MAXPRI);
2546 ev_io_start (EV_A_ &fs_w); 4253 ev_io_start (EV_A_ &fs_w);
4254 ev_unref (EV_A);
2547 } 4255 }
2548} 4256}
2549 4257
2550void inline_size 4258inline_size void
2551infy_fork (EV_P) 4259infy_fork (EV_P)
2552{ 4260{
2553 int slot; 4261 int slot;
2554 4262
2555 if (fs_fd < 0) 4263 if (fs_fd < 0)
2556 return; 4264 return;
2557 4265
4266 ev_ref (EV_A);
4267 ev_io_stop (EV_A_ &fs_w);
2558 close (fs_fd); 4268 close (fs_fd);
2559 fs_fd = inotify_init (); 4269 fs_fd = infy_newfd ();
2560 4270
4271 if (fs_fd >= 0)
4272 {
4273 fd_intern (fs_fd);
4274 ev_io_set (&fs_w, fs_fd, EV_READ);
4275 ev_io_start (EV_A_ &fs_w);
4276 ev_unref (EV_A);
4277 }
4278
2561 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4279 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2562 { 4280 {
2563 WL w_ = fs_hash [slot].head; 4281 WL w_ = fs_hash [slot].head;
2564 fs_hash [slot].head = 0; 4282 fs_hash [slot].head = 0;
2565 4283
2566 while (w_) 4284 while (w_)
… …
2571 w->wd = -1; 4289 w->wd = -1;
2572 4290
2573 if (fs_fd >= 0) 4291 if (fs_fd >= 0)
2574 infy_add (EV_A_ w); /* re-add, no matter what */ 4292 infy_add (EV_A_ w); /* re-add, no matter what */
2575 else 4293 else
4294 {
4295 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4296 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2576 ev_timer_start (EV_A_ &w->timer); 4297 ev_timer_again (EV_A_ &w->timer);
4298 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4299 }
2577 } 4300 }
2578
2579 } 4301 }
2580} 4302}
2581 4303
2582#endif 4304#endif
2583 4305
… …
2586#else 4308#else
2587# define EV_LSTAT(p,b) lstat (p, b) 4309# define EV_LSTAT(p,b) lstat (p, b)
2588#endif 4310#endif
2589 4311
2590void 4312void
2591ev_stat_stat (EV_P_ ev_stat *w) 4313ev_stat_stat (EV_P_ ev_stat *w) EV_THROW
2592{ 4314{
2593 if (lstat (w->path, &w->attr) < 0) 4315 if (lstat (w->path, &w->attr) < 0)
2594 w->attr.st_nlink = 0; 4316 w->attr.st_nlink = 0;
2595 else if (!w->attr.st_nlink) 4317 else if (!w->attr.st_nlink)
2596 w->attr.st_nlink = 1; 4318 w->attr.st_nlink = 1;
… …
2599static void noinline 4321static void noinline
2600stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4322stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2601{ 4323{
2602 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4324 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2603 4325
2604 /* we copy this here each the time so that */ 4326 ev_statdata prev = w->attr;
2605 /* prev has the old value when the callback gets invoked */
2606 w->prev = w->attr;
2607 ev_stat_stat (EV_A_ w); 4327 ev_stat_stat (EV_A_ w);
2608 4328
2609 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 4329 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2610 if ( 4330 if (
2611 w->prev.st_dev != w->attr.st_dev 4331 prev.st_dev != w->attr.st_dev
2612 || w->prev.st_ino != w->attr.st_ino 4332 || prev.st_ino != w->attr.st_ino
2613 || w->prev.st_mode != w->attr.st_mode 4333 || prev.st_mode != w->attr.st_mode
2614 || w->prev.st_nlink != w->attr.st_nlink 4334 || prev.st_nlink != w->attr.st_nlink
2615 || w->prev.st_uid != w->attr.st_uid 4335 || prev.st_uid != w->attr.st_uid
2616 || w->prev.st_gid != w->attr.st_gid 4336 || prev.st_gid != w->attr.st_gid
2617 || w->prev.st_rdev != w->attr.st_rdev 4337 || prev.st_rdev != w->attr.st_rdev
2618 || w->prev.st_size != w->attr.st_size 4338 || prev.st_size != w->attr.st_size
2619 || w->prev.st_atime != w->attr.st_atime 4339 || prev.st_atime != w->attr.st_atime
2620 || w->prev.st_mtime != w->attr.st_mtime 4340 || prev.st_mtime != w->attr.st_mtime
2621 || w->prev.st_ctime != w->attr.st_ctime 4341 || prev.st_ctime != w->attr.st_ctime
2622 ) { 4342 ) {
4343 /* we only update w->prev on actual differences */
4344 /* in case we test more often than invoke the callback, */
4345 /* to ensure that prev is always different to attr */
4346 w->prev = prev;
4347
2623 #if EV_USE_INOTIFY 4348 #if EV_USE_INOTIFY
4349 if (fs_fd >= 0)
4350 {
2624 infy_del (EV_A_ w); 4351 infy_del (EV_A_ w);
2625 infy_add (EV_A_ w); 4352 infy_add (EV_A_ w);
2626 ev_stat_stat (EV_A_ w); /* avoid race... */ 4353 ev_stat_stat (EV_A_ w); /* avoid race... */
4354 }
2627 #endif 4355 #endif
2628 4356
2629 ev_feed_event (EV_A_ w, EV_STAT); 4357 ev_feed_event (EV_A_ w, EV_STAT);
2630 } 4358 }
2631} 4359}
2632 4360
2633void 4361void
2634ev_stat_start (EV_P_ ev_stat *w) 4362ev_stat_start (EV_P_ ev_stat *w) EV_THROW
2635{ 4363{
2636 if (expect_false (ev_is_active (w))) 4364 if (expect_false (ev_is_active (w)))
2637 return; 4365 return;
2638 4366
2639 /* since we use memcmp, we need to clear any padding data etc. */
2640 memset (&w->prev, 0, sizeof (ev_statdata));
2641 memset (&w->attr, 0, sizeof (ev_statdata));
2642
2643 ev_stat_stat (EV_A_ w); 4367 ev_stat_stat (EV_A_ w);
2644 4368
4369 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2645 if (w->interval < MIN_STAT_INTERVAL) 4370 w->interval = MIN_STAT_INTERVAL;
2646 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2647 4371
2648 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 4372 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2649 ev_set_priority (&w->timer, ev_priority (w)); 4373 ev_set_priority (&w->timer, ev_priority (w));
2650 4374
2651#if EV_USE_INOTIFY 4375#if EV_USE_INOTIFY
2652 infy_init (EV_A); 4376 infy_init (EV_A);
2653 4377
2654 if (fs_fd >= 0) 4378 if (fs_fd >= 0)
2655 infy_add (EV_A_ w); 4379 infy_add (EV_A_ w);
2656 else 4380 else
2657#endif 4381#endif
4382 {
2658 ev_timer_start (EV_A_ &w->timer); 4383 ev_timer_again (EV_A_ &w->timer);
4384 ev_unref (EV_A);
4385 }
2659 4386
2660 ev_start (EV_A_ (W)w, 1); 4387 ev_start (EV_A_ (W)w, 1);
2661 4388
2662 EV_FREQUENT_CHECK; 4389 EV_FREQUENT_CHECK;
2663} 4390}
2664 4391
2665void 4392void
2666ev_stat_stop (EV_P_ ev_stat *w) 4393ev_stat_stop (EV_P_ ev_stat *w) EV_THROW
2667{ 4394{
2668 clear_pending (EV_A_ (W)w); 4395 clear_pending (EV_A_ (W)w);
2669 if (expect_false (!ev_is_active (w))) 4396 if (expect_false (!ev_is_active (w)))
2670 return; 4397 return;
2671 4398
2672 EV_FREQUENT_CHECK; 4399 EV_FREQUENT_CHECK;
2673 4400
2674#if EV_USE_INOTIFY 4401#if EV_USE_INOTIFY
2675 infy_del (EV_A_ w); 4402 infy_del (EV_A_ w);
2676#endif 4403#endif
4404
4405 if (ev_is_active (&w->timer))
4406 {
4407 ev_ref (EV_A);
2677 ev_timer_stop (EV_A_ &w->timer); 4408 ev_timer_stop (EV_A_ &w->timer);
4409 }
2678 4410
2679 ev_stop (EV_A_ (W)w); 4411 ev_stop (EV_A_ (W)w);
2680 4412
2681 EV_FREQUENT_CHECK; 4413 EV_FREQUENT_CHECK;
2682} 4414}
2683#endif 4415#endif
2684 4416
2685#if EV_IDLE_ENABLE 4417#if EV_IDLE_ENABLE
2686void 4418void
2687ev_idle_start (EV_P_ ev_idle *w) 4419ev_idle_start (EV_P_ ev_idle *w) EV_THROW
2688{ 4420{
2689 if (expect_false (ev_is_active (w))) 4421 if (expect_false (ev_is_active (w)))
2690 return; 4422 return;
2691 4423
2692 pri_adjust (EV_A_ (W)w); 4424 pri_adjust (EV_A_ (W)w);
… …
2705 4437
2706 EV_FREQUENT_CHECK; 4438 EV_FREQUENT_CHECK;
2707} 4439}
2708 4440
2709void 4441void
2710ev_idle_stop (EV_P_ ev_idle *w) 4442ev_idle_stop (EV_P_ ev_idle *w) EV_THROW
2711{ 4443{
2712 clear_pending (EV_A_ (W)w); 4444 clear_pending (EV_A_ (W)w);
2713 if (expect_false (!ev_is_active (w))) 4445 if (expect_false (!ev_is_active (w)))
2714 return; 4446 return;
2715 4447
… …
2727 4459
2728 EV_FREQUENT_CHECK; 4460 EV_FREQUENT_CHECK;
2729} 4461}
2730#endif 4462#endif
2731 4463
4464#if EV_PREPARE_ENABLE
2732void 4465void
2733ev_prepare_start (EV_P_ ev_prepare *w) 4466ev_prepare_start (EV_P_ ev_prepare *w) EV_THROW
2734{ 4467{
2735 if (expect_false (ev_is_active (w))) 4468 if (expect_false (ev_is_active (w)))
2736 return; 4469 return;
2737 4470
2738 EV_FREQUENT_CHECK; 4471 EV_FREQUENT_CHECK;
… …
2743 4476
2744 EV_FREQUENT_CHECK; 4477 EV_FREQUENT_CHECK;
2745} 4478}
2746 4479
2747void 4480void
2748ev_prepare_stop (EV_P_ ev_prepare *w) 4481ev_prepare_stop (EV_P_ ev_prepare *w) EV_THROW
2749{ 4482{
2750 clear_pending (EV_A_ (W)w); 4483 clear_pending (EV_A_ (W)w);
2751 if (expect_false (!ev_is_active (w))) 4484 if (expect_false (!ev_is_active (w)))
2752 return; 4485 return;
2753 4486
… …
2762 4495
2763 ev_stop (EV_A_ (W)w); 4496 ev_stop (EV_A_ (W)w);
2764 4497
2765 EV_FREQUENT_CHECK; 4498 EV_FREQUENT_CHECK;
2766} 4499}
4500#endif
2767 4501
4502#if EV_CHECK_ENABLE
2768void 4503void
2769ev_check_start (EV_P_ ev_check *w) 4504ev_check_start (EV_P_ ev_check *w) EV_THROW
2770{ 4505{
2771 if (expect_false (ev_is_active (w))) 4506 if (expect_false (ev_is_active (w)))
2772 return; 4507 return;
2773 4508
2774 EV_FREQUENT_CHECK; 4509 EV_FREQUENT_CHECK;
… …
2779 4514
2780 EV_FREQUENT_CHECK; 4515 EV_FREQUENT_CHECK;
2781} 4516}
2782 4517
2783void 4518void
2784ev_check_stop (EV_P_ ev_check *w) 4519ev_check_stop (EV_P_ ev_check *w) EV_THROW
2785{ 4520{
2786 clear_pending (EV_A_ (W)w); 4521 clear_pending (EV_A_ (W)w);
2787 if (expect_false (!ev_is_active (w))) 4522 if (expect_false (!ev_is_active (w)))
2788 return; 4523 return;
2789 4524
… …
2798 4533
2799 ev_stop (EV_A_ (W)w); 4534 ev_stop (EV_A_ (W)w);
2800 4535
2801 EV_FREQUENT_CHECK; 4536 EV_FREQUENT_CHECK;
2802} 4537}
4538#endif
2803 4539
2804#if EV_EMBED_ENABLE 4540#if EV_EMBED_ENABLE
2805void noinline 4541void noinline
2806ev_embed_sweep (EV_P_ ev_embed *w) 4542ev_embed_sweep (EV_P_ ev_embed *w) EV_THROW
2807{ 4543{
2808 ev_loop (w->other, EVLOOP_NONBLOCK); 4544 ev_run (w->other, EVRUN_NOWAIT);
2809} 4545}
2810 4546
2811static void 4547static void
2812embed_io_cb (EV_P_ ev_io *io, int revents) 4548embed_io_cb (EV_P_ ev_io *io, int revents)
2813{ 4549{
2814 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4550 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2815 4551
2816 if (ev_cb (w)) 4552 if (ev_cb (w))
2817 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4553 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2818 else 4554 else
2819 ev_loop (w->other, EVLOOP_NONBLOCK); 4555 ev_run (w->other, EVRUN_NOWAIT);
2820} 4556}
2821 4557
2822static void 4558static void
2823embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4559embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2824{ 4560{
2825 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 4561 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2826 4562
2827 { 4563 {
2828 struct ev_loop *loop = w->other; 4564 EV_P = w->other;
2829 4565
2830 while (fdchangecnt) 4566 while (fdchangecnt)
2831 { 4567 {
2832 fd_reify (EV_A); 4568 fd_reify (EV_A);
2833 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4569 ev_run (EV_A_ EVRUN_NOWAIT);
2834 } 4570 }
2835 } 4571 }
2836} 4572}
2837 4573
2838static void 4574static void
2839embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) 4575embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2840{ 4576{
2841 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); 4577 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2842 4578
4579 ev_embed_stop (EV_A_ w);
4580
2843 { 4581 {
2844 struct ev_loop *loop = w->other; 4582 EV_P = w->other;
2845 4583
2846 ev_loop_fork (EV_A); 4584 ev_loop_fork (EV_A);
4585 ev_run (EV_A_ EVRUN_NOWAIT);
2847 } 4586 }
4587
4588 ev_embed_start (EV_A_ w);
2848} 4589}
2849 4590
2850#if 0 4591#if 0
2851static void 4592static void
2852embed_idle_cb (EV_P_ ev_idle *idle, int revents) 4593embed_idle_cb (EV_P_ ev_idle *idle, int revents)
… …
2854 ev_idle_stop (EV_A_ idle); 4595 ev_idle_stop (EV_A_ idle);
2855} 4596}
2856#endif 4597#endif
2857 4598
2858void 4599void
2859ev_embed_start (EV_P_ ev_embed *w) 4600ev_embed_start (EV_P_ ev_embed *w) EV_THROW
2860{ 4601{
2861 if (expect_false (ev_is_active (w))) 4602 if (expect_false (ev_is_active (w)))
2862 return; 4603 return;
2863 4604
2864 { 4605 {
2865 struct ev_loop *loop = w->other; 4606 EV_P = w->other;
2866 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4607 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2867 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 4608 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2868 } 4609 }
2869 4610
2870 EV_FREQUENT_CHECK; 4611 EV_FREQUENT_CHECK;
2871 4612
… …
2885 4626
2886 EV_FREQUENT_CHECK; 4627 EV_FREQUENT_CHECK;
2887} 4628}
2888 4629
2889void 4630void
2890ev_embed_stop (EV_P_ ev_embed *w) 4631ev_embed_stop (EV_P_ ev_embed *w) EV_THROW
2891{ 4632{
2892 clear_pending (EV_A_ (W)w); 4633 clear_pending (EV_A_ (W)w);
2893 if (expect_false (!ev_is_active (w))) 4634 if (expect_false (!ev_is_active (w)))
2894 return; 4635 return;
2895 4636
… …
2897 4638
2898 ev_io_stop (EV_A_ &w->io); 4639 ev_io_stop (EV_A_ &w->io);
2899 ev_prepare_stop (EV_A_ &w->prepare); 4640 ev_prepare_stop (EV_A_ &w->prepare);
2900 ev_fork_stop (EV_A_ &w->fork); 4641 ev_fork_stop (EV_A_ &w->fork);
2901 4642
4643 ev_stop (EV_A_ (W)w);
4644
2902 EV_FREQUENT_CHECK; 4645 EV_FREQUENT_CHECK;
2903} 4646}
2904#endif 4647#endif
2905 4648
2906#if EV_FORK_ENABLE 4649#if EV_FORK_ENABLE
2907void 4650void
2908ev_fork_start (EV_P_ ev_fork *w) 4651ev_fork_start (EV_P_ ev_fork *w) EV_THROW
2909{ 4652{
2910 if (expect_false (ev_is_active (w))) 4653 if (expect_false (ev_is_active (w)))
2911 return; 4654 return;
2912 4655
2913 EV_FREQUENT_CHECK; 4656 EV_FREQUENT_CHECK;
… …
2918 4661
2919 EV_FREQUENT_CHECK; 4662 EV_FREQUENT_CHECK;
2920} 4663}
2921 4664
2922void 4665void
2923ev_fork_stop (EV_P_ ev_fork *w) 4666ev_fork_stop (EV_P_ ev_fork *w) EV_THROW
2924{ 4667{
2925 clear_pending (EV_A_ (W)w); 4668 clear_pending (EV_A_ (W)w);
2926 if (expect_false (!ev_is_active (w))) 4669 if (expect_false (!ev_is_active (w)))
2927 return; 4670 return;
2928 4671
… …
2939 4682
2940 EV_FREQUENT_CHECK; 4683 EV_FREQUENT_CHECK;
2941} 4684}
2942#endif 4685#endif
2943 4686
4687#if EV_CLEANUP_ENABLE
4688void
4689ev_cleanup_start (EV_P_ ev_cleanup *w) EV_THROW
4690{
4691 if (expect_false (ev_is_active (w)))
4692 return;
4693
4694 EV_FREQUENT_CHECK;
4695
4696 ev_start (EV_A_ (W)w, ++cleanupcnt);
4697 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, EMPTY2);
4698 cleanups [cleanupcnt - 1] = w;
4699
4700 /* cleanup watchers should never keep a refcount on the loop */
4701 ev_unref (EV_A);
4702 EV_FREQUENT_CHECK;
4703}
4704
4705void
4706ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_THROW
4707{
4708 clear_pending (EV_A_ (W)w);
4709 if (expect_false (!ev_is_active (w)))
4710 return;
4711
4712 EV_FREQUENT_CHECK;
4713 ev_ref (EV_A);
4714
4715 {
4716 int active = ev_active (w);
4717
4718 cleanups [active - 1] = cleanups [--cleanupcnt];
4719 ev_active (cleanups [active - 1]) = active;
4720 }
4721
4722 ev_stop (EV_A_ (W)w);
4723
4724 EV_FREQUENT_CHECK;
4725}
4726#endif
4727
2944#if EV_ASYNC_ENABLE 4728#if EV_ASYNC_ENABLE
2945void 4729void
2946ev_async_start (EV_P_ ev_async *w) 4730ev_async_start (EV_P_ ev_async *w) EV_THROW
2947{ 4731{
2948 if (expect_false (ev_is_active (w))) 4732 if (expect_false (ev_is_active (w)))
2949 return; 4733 return;
4734
4735 w->sent = 0;
2950 4736
2951 evpipe_init (EV_A); 4737 evpipe_init (EV_A);
2952 4738
2953 EV_FREQUENT_CHECK; 4739 EV_FREQUENT_CHECK;
2954 4740
… …
2958 4744
2959 EV_FREQUENT_CHECK; 4745 EV_FREQUENT_CHECK;
2960} 4746}
2961 4747
2962void 4748void
2963ev_async_stop (EV_P_ ev_async *w) 4749ev_async_stop (EV_P_ ev_async *w) EV_THROW
2964{ 4750{
2965 clear_pending (EV_A_ (W)w); 4751 clear_pending (EV_A_ (W)w);
2966 if (expect_false (!ev_is_active (w))) 4752 if (expect_false (!ev_is_active (w)))
2967 return; 4753 return;
2968 4754
… …
2979 4765
2980 EV_FREQUENT_CHECK; 4766 EV_FREQUENT_CHECK;
2981} 4767}
2982 4768
2983void 4769void
2984ev_async_send (EV_P_ ev_async *w) 4770ev_async_send (EV_P_ ev_async *w) EV_THROW
2985{ 4771{
2986 w->sent = 1; 4772 w->sent = 1;
2987 evpipe_write (EV_A_ &gotasync); 4773 evpipe_write (EV_A_ &async_pending);
2988} 4774}
2989#endif 4775#endif
2990 4776
2991/*****************************************************************************/ 4777/*****************************************************************************/
2992 4778
… …
3012} 4798}
3013 4799
3014static void 4800static void
3015once_cb_io (EV_P_ ev_io *w, int revents) 4801once_cb_io (EV_P_ ev_io *w, int revents)
3016{ 4802{
3017 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 4803 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
4804
4805 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
3018} 4806}
3019 4807
3020static void 4808static void
3021once_cb_to (EV_P_ ev_timer *w, int revents) 4809once_cb_to (EV_P_ ev_timer *w, int revents)
3022{ 4810{
3023 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 4811 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
4812
4813 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3024} 4814}
3025 4815
3026void 4816void
3027ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 4817ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_THROW
3028{ 4818{
3029 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 4819 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3030 4820
3031 if (expect_false (!once)) 4821 if (expect_false (!once))
3032 { 4822 {
3033 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg); 4823 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3034 return; 4824 return;
3035 } 4825 }
3036 4826
3037 once->cb = cb; 4827 once->cb = cb;
3038 once->arg = arg; 4828 once->arg = arg;
… …
3050 ev_timer_set (&once->to, timeout, 0.); 4840 ev_timer_set (&once->to, timeout, 0.);
3051 ev_timer_start (EV_A_ &once->to); 4841 ev_timer_start (EV_A_ &once->to);
3052 } 4842 }
3053} 4843}
3054 4844
4845/*****************************************************************************/
4846
4847#if EV_WALK_ENABLE
4848void ecb_cold
4849ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_THROW
4850{
4851 int i, j;
4852 ev_watcher_list *wl, *wn;
4853
4854 if (types & (EV_IO | EV_EMBED))
4855 for (i = 0; i < anfdmax; ++i)
4856 for (wl = anfds [i].head; wl; )
4857 {
4858 wn = wl->next;
4859
4860#if EV_EMBED_ENABLE
4861 if (ev_cb ((ev_io *)wl) == embed_io_cb)
4862 {
4863 if (types & EV_EMBED)
4864 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
4865 }
4866 else
4867#endif
4868#if EV_USE_INOTIFY
4869 if (ev_cb ((ev_io *)wl) == infy_cb)
4870 ;
4871 else
4872#endif
4873 if ((ev_io *)wl != &pipe_w)
4874 if (types & EV_IO)
4875 cb (EV_A_ EV_IO, wl);
4876
4877 wl = wn;
4878 }
4879
4880 if (types & (EV_TIMER | EV_STAT))
4881 for (i = timercnt + HEAP0; i-- > HEAP0; )
4882#if EV_STAT_ENABLE
4883 /*TODO: timer is not always active*/
4884 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
4885 {
4886 if (types & EV_STAT)
4887 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
4888 }
4889 else
4890#endif
4891 if (types & EV_TIMER)
4892 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
4893
4894#if EV_PERIODIC_ENABLE
4895 if (types & EV_PERIODIC)
4896 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
4897 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
4898#endif
4899
4900#if EV_IDLE_ENABLE
4901 if (types & EV_IDLE)
4902 for (j = NUMPRI; j--; )
4903 for (i = idlecnt [j]; i--; )
4904 cb (EV_A_ EV_IDLE, idles [j][i]);
4905#endif
4906
4907#if EV_FORK_ENABLE
4908 if (types & EV_FORK)
4909 for (i = forkcnt; i--; )
4910 if (ev_cb (forks [i]) != embed_fork_cb)
4911 cb (EV_A_ EV_FORK, forks [i]);
4912#endif
4913
4914#if EV_ASYNC_ENABLE
4915 if (types & EV_ASYNC)
4916 for (i = asynccnt; i--; )
4917 cb (EV_A_ EV_ASYNC, asyncs [i]);
4918#endif
4919
4920#if EV_PREPARE_ENABLE
4921 if (types & EV_PREPARE)
4922 for (i = preparecnt; i--; )
4923# if EV_EMBED_ENABLE
4924 if (ev_cb (prepares [i]) != embed_prepare_cb)
4925# endif
4926 cb (EV_A_ EV_PREPARE, prepares [i]);
4927#endif
4928
4929#if EV_CHECK_ENABLE
4930 if (types & EV_CHECK)
4931 for (i = checkcnt; i--; )
4932 cb (EV_A_ EV_CHECK, checks [i]);
4933#endif
4934
4935#if EV_SIGNAL_ENABLE
4936 if (types & EV_SIGNAL)
4937 for (i = 0; i < EV_NSIG - 1; ++i)
4938 for (wl = signals [i].head; wl; )
4939 {
4940 wn = wl->next;
4941 cb (EV_A_ EV_SIGNAL, wl);
4942 wl = wn;
4943 }
4944#endif
4945
4946#if EV_CHILD_ENABLE
4947 if (types & EV_CHILD)
4948 for (i = (EV_PID_HASHSIZE); i--; )
4949 for (wl = childs [i]; wl; )
4950 {
4951 wn = wl->next;
4952 cb (EV_A_ EV_CHILD, wl);
4953 wl = wn;
4954 }
4955#endif
4956/* EV_STAT 0x00001000 /* stat data changed */
4957/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
4958}
4959#endif
4960
3055#if EV_MULTIPLICITY 4961#if EV_MULTIPLICITY
3056 #include "ev_wrap.h" 4962 #include "ev_wrap.h"
3057#endif 4963#endif
3058 4964
3059#ifdef __cplusplus
3060}
3061#endif
3062

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