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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 1.494 by root, Sun Jun 23 23:28:45 2019 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) 2007-2019 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
100# ifndef EV_USE_KQUEUE 120# if HAVE_LINUX_AIO_ABI_H
101# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 121# ifndef EV_USE_LINUXAIO
102# define EV_USE_KQUEUE 1 122# define EV_USE_LINUXAIO EV_FEATURE_BACKENDS
103# else
104# define EV_USE_KQUEUE 0
105# endif 123# endif
124# else
125# undef EV_USE_LINUXAIO
126# define EV_USE_LINUXAIO 0
106# endif 127# endif
107 128
108# ifndef EV_USE_PORT 129# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
109# if HAVE_PORT_H && HAVE_PORT_CREATE 130# ifndef EV_USE_KQUEUE
110# define EV_USE_PORT 1 131# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
111# else
112# define EV_USE_PORT 0
113# endif 132# endif
133# else
134# undef EV_USE_KQUEUE
135# define EV_USE_KQUEUE 0
114# endif 136# endif
115 137
138# if HAVE_PORT_H && HAVE_PORT_CREATE
116# ifndef EV_USE_INOTIFY 139# ifndef EV_USE_PORT
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 140# define EV_USE_PORT EV_FEATURE_BACKENDS
118# define EV_USE_INOTIFY 1
119# else
120# define EV_USE_INOTIFY 0
121# endif 141# endif
142# else
143# undef EV_USE_PORT
144# define EV_USE_PORT 0
122# endif 145# endif
123 146
147# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
124# ifndef EV_USE_EVENTFD 148# ifndef EV_USE_INOTIFY
125# if HAVE_EVENTFD 149# define EV_USE_INOTIFY 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_INOTIFY
153# define EV_USE_INOTIFY 0
154# endif
155
156# if HAVE_SIGNALFD && HAVE_SYS_SIGNALFD_H
157# ifndef EV_USE_SIGNALFD
158# define EV_USE_SIGNALFD EV_FEATURE_OS
159# endif
160# else
161# undef EV_USE_SIGNALFD
162# define EV_USE_SIGNALFD 0
163# endif
164
165# if HAVE_EVENTFD
166# ifndef EV_USE_EVENTFD
167# define EV_USE_EVENTFD EV_FEATURE_OS
168# endif
169# else
170# undef EV_USE_EVENTFD
171# define EV_USE_EVENTFD 0
130# endif 172# endif
131 173
132#endif 174#endif
133 175
134#include <math.h> 176/* OS X, in its infinite idiocy, actually HARDCODES
177 * a limit of 1024 into their select. Where people have brains,
178 * OS X engineers apparently have a vacuum. Or maybe they were
179 * ordered to have a vacuum, or they do anything for money.
180 * This might help. Or not.
181 * Note that this must be defined early, as other include files
182 * will rely on this define as well.
183 */
184#define _DARWIN_UNLIMITED_SELECT 1
185
135#include <stdlib.h> 186#include <stdlib.h>
187#include <string.h>
136#include <fcntl.h> 188#include <fcntl.h>
137#include <stddef.h> 189#include <stddef.h>
138 190
139#include <stdio.h> 191#include <stdio.h>
140 192
141#include <assert.h> 193#include <assert.h>
142#include <errno.h> 194#include <errno.h>
143#include <sys/types.h> 195#include <sys/types.h>
144#include <time.h> 196#include <time.h>
197#include <limits.h>
145 198
146#include <signal.h> 199#include <signal.h>
147 200
148#ifdef EV_H 201#ifdef EV_H
149# include EV_H 202# include EV_H
150#else 203#else
151# include "ev.h" 204# include "ev.h"
205#endif
206
207#if EV_NO_THREADS
208# undef EV_NO_SMP
209# define EV_NO_SMP 1
210# undef ECB_NO_THREADS
211# define ECB_NO_THREADS 1
212#endif
213#if EV_NO_SMP
214# undef EV_NO_SMP
215# define ECB_NO_SMP 1
152#endif 216#endif
153 217
154#ifndef _WIN32 218#ifndef _WIN32
155# include <sys/time.h> 219# include <sys/time.h>
156# include <sys/wait.h> 220# include <sys/wait.h>
157# include <unistd.h> 221# include <unistd.h>
158#else 222#else
159# include <io.h> 223# include <io.h>
160# define WIN32_LEAN_AND_MEAN 224# define WIN32_LEAN_AND_MEAN
225# include <winsock2.h>
161# include <windows.h> 226# include <windows.h>
162# ifndef EV_SELECT_IS_WINSOCKET 227# ifndef EV_SELECT_IS_WINSOCKET
163# define EV_SELECT_IS_WINSOCKET 1 228# define EV_SELECT_IS_WINSOCKET 1
164# endif 229# endif
230# undef EV_AVOID_STDIO
165#endif 231#endif
166 232
167/* this block tries to deduce configuration from header-defined symbols and defaults */ 233/* this block tries to deduce configuration from header-defined symbols and defaults */
168 234
235/* try to deduce the maximum number of signals on this platform */
236#if defined EV_NSIG
237/* use what's provided */
238#elif defined NSIG
239# define EV_NSIG (NSIG)
240#elif defined _NSIG
241# define EV_NSIG (_NSIG)
242#elif defined SIGMAX
243# define EV_NSIG (SIGMAX+1)
244#elif defined SIG_MAX
245# define EV_NSIG (SIG_MAX+1)
246#elif defined _SIG_MAX
247# define EV_NSIG (_SIG_MAX+1)
248#elif defined MAXSIG
249# define EV_NSIG (MAXSIG+1)
250#elif defined MAX_SIG
251# define EV_NSIG (MAX_SIG+1)
252#elif defined SIGARRAYSIZE
253# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
254#elif defined _sys_nsig
255# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
256#else
257# define EV_NSIG (8 * sizeof (sigset_t) + 1)
258#endif
259
260#ifndef EV_USE_FLOOR
261# define EV_USE_FLOOR 0
262#endif
263
264#ifndef EV_USE_CLOCK_SYSCALL
265# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
266# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
267# else
268# define EV_USE_CLOCK_SYSCALL 0
269# endif
270#endif
271
272#if !(_POSIX_TIMERS > 0)
273# ifndef EV_USE_MONOTONIC
274# define EV_USE_MONOTONIC 0
275# endif
276# ifndef EV_USE_REALTIME
277# define EV_USE_REALTIME 0
278# endif
279#endif
280
169#ifndef EV_USE_MONOTONIC 281#ifndef EV_USE_MONOTONIC
170# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 282# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
171# define EV_USE_MONOTONIC 1 283# define EV_USE_MONOTONIC EV_FEATURE_OS
172# else 284# else
173# define EV_USE_MONOTONIC 0 285# define EV_USE_MONOTONIC 0
174# endif 286# endif
175#endif 287#endif
176 288
177#ifndef EV_USE_REALTIME 289#ifndef EV_USE_REALTIME
178# define EV_USE_REALTIME 0 290# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
179#endif 291#endif
180 292
181#ifndef EV_USE_NANOSLEEP 293#ifndef EV_USE_NANOSLEEP
182# if _POSIX_C_SOURCE >= 199309L 294# if _POSIX_C_SOURCE >= 199309L
183# define EV_USE_NANOSLEEP 1 295# define EV_USE_NANOSLEEP EV_FEATURE_OS
184# else 296# else
185# define EV_USE_NANOSLEEP 0 297# define EV_USE_NANOSLEEP 0
186# endif 298# endif
187#endif 299#endif
188 300
189#ifndef EV_USE_SELECT 301#ifndef EV_USE_SELECT
190# define EV_USE_SELECT 1 302# define EV_USE_SELECT EV_FEATURE_BACKENDS
191#endif 303#endif
192 304
193#ifndef EV_USE_POLL 305#ifndef EV_USE_POLL
194# ifdef _WIN32 306# ifdef _WIN32
195# define EV_USE_POLL 0 307# define EV_USE_POLL 0
196# else 308# else
197# define EV_USE_POLL 1 309# define EV_USE_POLL EV_FEATURE_BACKENDS
198# endif 310# endif
199#endif 311#endif
200 312
201#ifndef EV_USE_EPOLL 313#ifndef EV_USE_EPOLL
202# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 314# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
203# define EV_USE_EPOLL 1 315# define EV_USE_EPOLL EV_FEATURE_BACKENDS
204# else 316# else
205# define EV_USE_EPOLL 0 317# define EV_USE_EPOLL 0
206# endif 318# endif
207#endif 319#endif
208 320
… …
212 324
213#ifndef EV_USE_PORT 325#ifndef EV_USE_PORT
214# define EV_USE_PORT 0 326# define EV_USE_PORT 0
215#endif 327#endif
216 328
329#ifndef EV_USE_LINUXAIO
330# if __linux /* libev currently assumes linux/aio_abi.h is always available on linux */
331# define EV_USE_LINUXAIO 1
332# else
333# define EV_USE_LINUXAIO 0
334# endif
335#endif
336
217#ifndef EV_USE_INOTIFY 337#ifndef EV_USE_INOTIFY
218# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 338# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
219# define EV_USE_INOTIFY 1 339# define EV_USE_INOTIFY EV_FEATURE_OS
220# else 340# else
221# define EV_USE_INOTIFY 0 341# define EV_USE_INOTIFY 0
222# endif 342# endif
223#endif 343#endif
224 344
225#ifndef EV_PID_HASHSIZE 345#ifndef EV_PID_HASHSIZE
226# if EV_MINIMAL 346# 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 347#endif
232 348
233#ifndef EV_INOTIFY_HASHSIZE 349#ifndef EV_INOTIFY_HASHSIZE
234# if EV_MINIMAL 350# 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 351#endif
240 352
241#ifndef EV_USE_EVENTFD 353#ifndef EV_USE_EVENTFD
242# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 354# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
243# define EV_USE_EVENTFD 1 355# define EV_USE_EVENTFD EV_FEATURE_OS
244# else 356# else
245# define EV_USE_EVENTFD 0 357# define EV_USE_EVENTFD 0
358# endif
359#endif
360
361#ifndef EV_USE_SIGNALFD
362# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
363# define EV_USE_SIGNALFD EV_FEATURE_OS
364# else
365# define EV_USE_SIGNALFD 0
246# endif 366# endif
247#endif 367#endif
248 368
249#if 0 /* debugging */ 369#if 0 /* debugging */
250# define EV_VERIFY 3 370# define EV_VERIFY 3
251# define EV_USE_4HEAP 1 371# define EV_USE_4HEAP 1
252# define EV_HEAP_CACHE_AT 1 372# define EV_HEAP_CACHE_AT 1
253#endif 373#endif
254 374
255#ifndef EV_VERIFY 375#ifndef EV_VERIFY
256# define EV_VERIFY !EV_MINIMAL 376# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
257#endif 377#endif
258 378
259#ifndef EV_USE_4HEAP 379#ifndef EV_USE_4HEAP
260# define EV_USE_4HEAP !EV_MINIMAL 380# define EV_USE_4HEAP EV_FEATURE_DATA
261#endif 381#endif
262 382
263#ifndef EV_HEAP_CACHE_AT 383#ifndef EV_HEAP_CACHE_AT
264# define EV_HEAP_CACHE_AT !EV_MINIMAL 384# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
385#endif
386
387#ifdef __ANDROID__
388/* supposedly, android doesn't typedef fd_mask */
389# undef EV_USE_SELECT
390# define EV_USE_SELECT 0
391/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
392# undef EV_USE_CLOCK_SYSCALL
393# define EV_USE_CLOCK_SYSCALL 0
394#endif
395
396/* aix's poll.h seems to cause lots of trouble */
397#ifdef _AIX
398/* AIX has a completely broken poll.h header */
399# undef EV_USE_POLL
400# define EV_USE_POLL 0
401#endif
402
403/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
404/* which makes programs even slower. might work on other unices, too. */
405#if EV_USE_CLOCK_SYSCALL
406# include <sys/syscall.h>
407# ifdef SYS_clock_gettime
408# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
409# undef EV_USE_MONOTONIC
410# define EV_USE_MONOTONIC 1
411# else
412# undef EV_USE_CLOCK_SYSCALL
413# define EV_USE_CLOCK_SYSCALL 0
414# endif
265#endif 415#endif
266 416
267/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 417/* this block fixes any misconfiguration where we know we run into trouble otherwise */
268 418
269#ifndef CLOCK_MONOTONIC 419#ifndef CLOCK_MONOTONIC
… …
280# undef EV_USE_INOTIFY 430# undef EV_USE_INOTIFY
281# define EV_USE_INOTIFY 0 431# define EV_USE_INOTIFY 0
282#endif 432#endif
283 433
284#if !EV_USE_NANOSLEEP 434#if !EV_USE_NANOSLEEP
285# ifndef _WIN32 435/* hp-ux has it in sys/time.h, which we unconditionally include above */
436# if !defined _WIN32 && !defined __hpux
286# include <sys/select.h> 437# include <sys/select.h>
287# endif 438# endif
288#endif 439#endif
289 440
441#if EV_USE_LINUXAIO
442# include <sys/syscall.h>
443# if !SYS_io_getevents || !EV_USE_EPOLL
444# undef EV_USE_LINUXAIO
445# define EV_USE_LINUXAIO 0
446# endif
447#endif
448
290#if EV_USE_INOTIFY 449#if EV_USE_INOTIFY
450# include <sys/statfs.h>
291# include <sys/inotify.h> 451# include <sys/inotify.h>
452/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
453# ifndef IN_DONT_FOLLOW
454# undef EV_USE_INOTIFY
455# define EV_USE_INOTIFY 0
292#endif 456# endif
293
294#if EV_SELECT_IS_WINSOCKET
295# include <winsock.h>
296#endif 457#endif
297 458
298#if EV_USE_EVENTFD 459#if EV_USE_EVENTFD
299/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 460/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
300# include <stdint.h> 461# include <stdint.h>
301# ifdef __cplusplus 462# ifndef EFD_NONBLOCK
302extern "C" { 463# define EFD_NONBLOCK O_NONBLOCK
303# endif 464# endif
304int eventfd (unsigned int initval, int flags); 465# ifndef EFD_CLOEXEC
305# ifdef __cplusplus 466# ifdef O_CLOEXEC
306} 467# define EFD_CLOEXEC O_CLOEXEC
468# else
469# define EFD_CLOEXEC 02000000
470# endif
307# endif 471# endif
472EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
473#endif
474
475#if EV_USE_SIGNALFD
476/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
477# include <stdint.h>
478# ifndef SFD_NONBLOCK
479# define SFD_NONBLOCK O_NONBLOCK
480# endif
481# ifndef SFD_CLOEXEC
482# ifdef O_CLOEXEC
483# define SFD_CLOEXEC O_CLOEXEC
484# else
485# define SFD_CLOEXEC 02000000
486# endif
487# endif
488EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
489
490struct signalfd_siginfo
491{
492 uint32_t ssi_signo;
493 char pad[128 - sizeof (uint32_t)];
494};
308#endif 495#endif
309 496
310/**/ 497/**/
311 498
312#if EV_VERIFY >= 3 499#if EV_VERIFY >= 3
313# define EV_FREQUENT_CHECK ev_loop_verify (EV_A) 500# define EV_FREQUENT_CHECK ev_verify (EV_A)
314#else 501#else
315# define EV_FREQUENT_CHECK do { } while (0) 502# define EV_FREQUENT_CHECK do { } while (0)
316#endif 503#endif
317 504
318/* 505/*
319 * This is used to avoid floating point rounding problems. 506 * 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. 507 * This value is good at least till the year 4000.
324 * Better solutions welcome.
325 */ 508 */
326#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 509#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
510/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
327 511
328#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 512#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) */ 513#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 */
331 514
515#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
516#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
517
518/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
519/* ECB.H BEGIN */
520/*
521 * libecb - http://software.schmorp.de/pkg/libecb
522 *
523 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
524 * Copyright (©) 2011 Emanuele Giaquinta
525 * All rights reserved.
526 *
527 * Redistribution and use in source and binary forms, with or without modifica-
528 * tion, are permitted provided that the following conditions are met:
529 *
530 * 1. Redistributions of source code must retain the above copyright notice,
531 * this list of conditions and the following disclaimer.
532 *
533 * 2. Redistributions in binary form must reproduce the above copyright
534 * notice, this list of conditions and the following disclaimer in the
535 * documentation and/or other materials provided with the distribution.
536 *
537 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
538 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
539 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
540 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
541 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
542 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
543 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
544 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
545 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
546 * OF THE POSSIBILITY OF SUCH DAMAGE.
547 *
548 * Alternatively, the contents of this file may be used under the terms of
549 * the GNU General Public License ("GPL") version 2 or any later version,
550 * in which case the provisions of the GPL are applicable instead of
551 * the above. If you wish to allow the use of your version of this file
552 * only under the terms of the GPL and not to allow others to use your
553 * version of this file under the BSD license, indicate your decision
554 * by deleting the provisions above and replace them with the notice
555 * and other provisions required by the GPL. If you do not delete the
556 * provisions above, a recipient may use your version of this file under
557 * either the BSD or the GPL.
558 */
559
560#ifndef ECB_H
561#define ECB_H
562
563/* 16 bits major, 16 bits minor */
564#define ECB_VERSION 0x00010005
565
566#ifdef _WIN32
567 typedef signed char int8_t;
568 typedef unsigned char uint8_t;
569 typedef signed short int16_t;
570 typedef unsigned short uint16_t;
571 typedef signed int int32_t;
572 typedef unsigned int uint32_t;
332#if __GNUC__ >= 4 573 #if __GNUC__
574 typedef signed long long int64_t;
575 typedef unsigned long long uint64_t;
576 #else /* _MSC_VER || __BORLANDC__ */
577 typedef signed __int64 int64_t;
578 typedef unsigned __int64 uint64_t;
579 #endif
580 #ifdef _WIN64
581 #define ECB_PTRSIZE 8
582 typedef uint64_t uintptr_t;
583 typedef int64_t intptr_t;
584 #else
585 #define ECB_PTRSIZE 4
586 typedef uint32_t uintptr_t;
587 typedef int32_t intptr_t;
588 #endif
589#else
590 #include <inttypes.h>
591 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
592 #define ECB_PTRSIZE 8
593 #else
594 #define ECB_PTRSIZE 4
595 #endif
596#endif
597
598#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
599#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
600
601/* work around x32 idiocy by defining proper macros */
602#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
603 #if _ILP32
604 #define ECB_AMD64_X32 1
605 #else
606 #define ECB_AMD64 1
607 #endif
608#endif
609
610/* many compilers define _GNUC_ to some versions but then only implement
611 * what their idiot authors think are the "more important" extensions,
612 * causing enormous grief in return for some better fake benchmark numbers.
613 * or so.
614 * we try to detect these and simply assume they are not gcc - if they have
615 * an issue with that they should have done it right in the first place.
616 */
617#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
618 #define ECB_GCC_VERSION(major,minor) 0
619#else
620 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
621#endif
622
623#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
624
625#if __clang__ && defined __has_builtin
626 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
627#else
628 #define ECB_CLANG_BUILTIN(x) 0
629#endif
630
631#if __clang__ && defined __has_extension
632 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
633#else
634 #define ECB_CLANG_EXTENSION(x) 0
635#endif
636
637#define ECB_CPP (__cplusplus+0)
638#define ECB_CPP11 (__cplusplus >= 201103L)
639#define ECB_CPP14 (__cplusplus >= 201402L)
640#define ECB_CPP17 (__cplusplus >= 201703L)
641
642#if ECB_CPP
643 #define ECB_C 0
644 #define ECB_STDC_VERSION 0
645#else
646 #define ECB_C 1
647 #define ECB_STDC_VERSION __STDC_VERSION__
648#endif
649
650#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
651#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
652#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
653
654#if ECB_CPP
655 #define ECB_EXTERN_C extern "C"
656 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
657 #define ECB_EXTERN_C_END }
658#else
659 #define ECB_EXTERN_C extern
660 #define ECB_EXTERN_C_BEG
661 #define ECB_EXTERN_C_END
662#endif
663
664/*****************************************************************************/
665
666/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
667/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
668
669#if ECB_NO_THREADS
670 #define ECB_NO_SMP 1
671#endif
672
673#if ECB_NO_SMP
674 #define ECB_MEMORY_FENCE do { } while (0)
675#endif
676
677/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
678#if __xlC__ && ECB_CPP
679 #include <builtins.h>
680#endif
681
682#if 1400 <= _MSC_VER
683 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
684#endif
685
686#ifndef ECB_MEMORY_FENCE
687 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
688 #if __i386 || __i386__
689 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
690 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
691 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
692 #elif ECB_GCC_AMD64
693 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
694 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
695 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
696 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
697 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
698 #elif defined __ARM_ARCH_2__ \
699 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
700 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
701 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
702 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
703 || defined __ARM_ARCH_5TEJ__
704 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
705 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
706 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
707 || defined __ARM_ARCH_6T2__
708 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
709 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
710 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
711 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
712 #elif __aarch64__
713 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
714 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
715 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
716 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
717 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
718 #elif defined __s390__ || defined __s390x__
719 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
720 #elif defined __mips__
721 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
722 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
723 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
724 #elif defined __alpha__
725 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
726 #elif defined __hppa__
727 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
728 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
729 #elif defined __ia64__
730 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
731 #elif defined __m68k__
732 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
733 #elif defined __m88k__
734 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
735 #elif defined __sh__
736 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
737 #endif
738 #endif
739#endif
740
741#ifndef ECB_MEMORY_FENCE
742 #if ECB_GCC_VERSION(4,7)
743 /* see comment below (stdatomic.h) about the C11 memory model. */
744 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
745 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
746 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
747
748 #elif ECB_CLANG_EXTENSION(c_atomic)
749 /* see comment below (stdatomic.h) about the C11 memory model. */
750 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
751 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
752 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
753
754 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
755 #define ECB_MEMORY_FENCE __sync_synchronize ()
756 #elif _MSC_VER >= 1500 /* VC++ 2008 */
757 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
758 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
759 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
760 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
761 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
762 #elif _MSC_VER >= 1400 /* VC++ 2005 */
763 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
764 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
765 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
766 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
767 #elif defined _WIN32
768 #include <WinNT.h>
769 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
770 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
771 #include <mbarrier.h>
772 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
773 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
774 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
775 #elif __xlC__
776 #define ECB_MEMORY_FENCE __sync ()
777 #endif
778#endif
779
780#ifndef ECB_MEMORY_FENCE
781 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
782 /* we assume that these memory fences work on all variables/all memory accesses, */
783 /* not just C11 atomics and atomic accesses */
784 #include <stdatomic.h>
785 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
786 /* any fence other than seq_cst, which isn't very efficient for us. */
787 /* Why that is, we don't know - either the C11 memory model is quite useless */
788 /* for most usages, or gcc and clang have a bug */
789 /* I *currently* lean towards the latter, and inefficiently implement */
790 /* all three of ecb's fences as a seq_cst fence */
791 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
792 /* for all __atomic_thread_fence's except seq_cst */
793 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
794 #endif
795#endif
796
797#ifndef ECB_MEMORY_FENCE
798 #if !ECB_AVOID_PTHREADS
799 /*
800 * if you get undefined symbol references to pthread_mutex_lock,
801 * or failure to find pthread.h, then you should implement
802 * the ECB_MEMORY_FENCE operations for your cpu/compiler
803 * OR provide pthread.h and link against the posix thread library
804 * of your system.
805 */
806 #include <pthread.h>
807 #define ECB_NEEDS_PTHREADS 1
808 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
809
810 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
811 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
812 #endif
813#endif
814
815#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
816 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
817#endif
818
819#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
820 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
821#endif
822
823/*****************************************************************************/
824
825#if ECB_CPP
826 #define ecb_inline static inline
827#elif ECB_GCC_VERSION(2,5)
828 #define ecb_inline static __inline__
829#elif ECB_C99
830 #define ecb_inline static inline
831#else
832 #define ecb_inline static
833#endif
834
835#if ECB_GCC_VERSION(3,3)
836 #define ecb_restrict __restrict__
837#elif ECB_C99
838 #define ecb_restrict restrict
839#else
840 #define ecb_restrict
841#endif
842
843typedef int ecb_bool;
844
845#define ECB_CONCAT_(a, b) a ## b
846#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
847#define ECB_STRINGIFY_(a) # a
848#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
849#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
850
851#define ecb_function_ ecb_inline
852
853#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
854 #define ecb_attribute(attrlist) __attribute__ (attrlist)
855#else
856 #define ecb_attribute(attrlist)
857#endif
858
859#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
860 #define ecb_is_constant(expr) __builtin_constant_p (expr)
861#else
862 /* possible C11 impl for integral types
863 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
864 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
865
866 #define ecb_is_constant(expr) 0
867#endif
868
869#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
333# define expect(expr,value) __builtin_expect ((expr),(value)) 870 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
334# define noinline __attribute__ ((noinline))
335#else 871#else
336# define expect(expr,value) (expr) 872 #define ecb_expect(expr,value) (expr)
337# define noinline
338# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
339# define inline
340# endif 873#endif
341#endif
342 874
875#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
876 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
877#else
878 #define ecb_prefetch(addr,rw,locality)
879#endif
880
881/* no emulation for ecb_decltype */
882#if ECB_CPP11
883 // older implementations might have problems with decltype(x)::type, work around it
884 template<class T> struct ecb_decltype_t { typedef T type; };
885 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
886#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
887 #define ecb_decltype(x) __typeof__ (x)
888#endif
889
890#if _MSC_VER >= 1300
891 #define ecb_deprecated __declspec (deprecated)
892#else
893 #define ecb_deprecated ecb_attribute ((__deprecated__))
894#endif
895
896#if _MSC_VER >= 1500
897 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
898#elif ECB_GCC_VERSION(4,5)
899 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
900#else
901 #define ecb_deprecated_message(msg) ecb_deprecated
902#endif
903
904#if _MSC_VER >= 1400
905 #define ecb_noinline __declspec (noinline)
906#else
907 #define ecb_noinline ecb_attribute ((__noinline__))
908#endif
909
910#define ecb_unused ecb_attribute ((__unused__))
911#define ecb_const ecb_attribute ((__const__))
912#define ecb_pure ecb_attribute ((__pure__))
913
914#if ECB_C11 || __IBMC_NORETURN
915 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
916 #define ecb_noreturn _Noreturn
917#elif ECB_CPP11
918 #define ecb_noreturn [[noreturn]]
919#elif _MSC_VER >= 1200
920 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
921 #define ecb_noreturn __declspec (noreturn)
922#else
923 #define ecb_noreturn ecb_attribute ((__noreturn__))
924#endif
925
926#if ECB_GCC_VERSION(4,3)
927 #define ecb_artificial ecb_attribute ((__artificial__))
928 #define ecb_hot ecb_attribute ((__hot__))
929 #define ecb_cold ecb_attribute ((__cold__))
930#else
931 #define ecb_artificial
932 #define ecb_hot
933 #define ecb_cold
934#endif
935
936/* put around conditional expressions if you are very sure that the */
937/* expression is mostly true or mostly false. note that these return */
938/* booleans, not the expression. */
343#define expect_false(expr) expect ((expr) != 0, 0) 939#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
344#define expect_true(expr) expect ((expr) != 0, 1) 940#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
941/* for compatibility to the rest of the world */
942#define ecb_likely(expr) ecb_expect_true (expr)
943#define ecb_unlikely(expr) ecb_expect_false (expr)
944
945/* count trailing zero bits and count # of one bits */
946#if ECB_GCC_VERSION(3,4) \
947 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
948 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
949 && ECB_CLANG_BUILTIN(__builtin_popcount))
950 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
951 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
952 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
953 #define ecb_ctz32(x) __builtin_ctz (x)
954 #define ecb_ctz64(x) __builtin_ctzll (x)
955 #define ecb_popcount32(x) __builtin_popcount (x)
956 /* no popcountll */
957#else
958 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
959 ecb_function_ ecb_const int
960 ecb_ctz32 (uint32_t x)
961 {
962#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
963 unsigned long r;
964 _BitScanForward (&r, x);
965 return (int)r;
966#else
967 int r = 0;
968
969 x &= ~x + 1; /* this isolates the lowest bit */
970
971#if ECB_branchless_on_i386
972 r += !!(x & 0xaaaaaaaa) << 0;
973 r += !!(x & 0xcccccccc) << 1;
974 r += !!(x & 0xf0f0f0f0) << 2;
975 r += !!(x & 0xff00ff00) << 3;
976 r += !!(x & 0xffff0000) << 4;
977#else
978 if (x & 0xaaaaaaaa) r += 1;
979 if (x & 0xcccccccc) r += 2;
980 if (x & 0xf0f0f0f0) r += 4;
981 if (x & 0xff00ff00) r += 8;
982 if (x & 0xffff0000) r += 16;
983#endif
984
985 return r;
986#endif
987 }
988
989 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
990 ecb_function_ ecb_const int
991 ecb_ctz64 (uint64_t x)
992 {
993#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
994 unsigned long r;
995 _BitScanForward64 (&r, x);
996 return (int)r;
997#else
998 int shift = x & 0xffffffff ? 0 : 32;
999 return ecb_ctz32 (x >> shift) + shift;
1000#endif
1001 }
1002
1003 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
1004 ecb_function_ ecb_const int
1005 ecb_popcount32 (uint32_t x)
1006 {
1007 x -= (x >> 1) & 0x55555555;
1008 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
1009 x = ((x >> 4) + x) & 0x0f0f0f0f;
1010 x *= 0x01010101;
1011
1012 return x >> 24;
1013 }
1014
1015 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
1016 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
1017 {
1018#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1019 unsigned long r;
1020 _BitScanReverse (&r, x);
1021 return (int)r;
1022#else
1023 int r = 0;
1024
1025 if (x >> 16) { x >>= 16; r += 16; }
1026 if (x >> 8) { x >>= 8; r += 8; }
1027 if (x >> 4) { x >>= 4; r += 4; }
1028 if (x >> 2) { x >>= 2; r += 2; }
1029 if (x >> 1) { r += 1; }
1030
1031 return r;
1032#endif
1033 }
1034
1035 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1036 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1037 {
1038#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1039 unsigned long r;
1040 _BitScanReverse64 (&r, x);
1041 return (int)r;
1042#else
1043 int r = 0;
1044
1045 if (x >> 32) { x >>= 32; r += 32; }
1046
1047 return r + ecb_ld32 (x);
1048#endif
1049 }
1050#endif
1051
1052ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1053ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1054ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1055ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1056
1057ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1058ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1059{
1060 return ( (x * 0x0802U & 0x22110U)
1061 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1062}
1063
1064ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1065ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1066{
1067 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1068 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1069 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1070 x = ( x >> 8 ) | ( x << 8);
1071
1072 return x;
1073}
1074
1075ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1076ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1077{
1078 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1079 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1080 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1081 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1082 x = ( x >> 16 ) | ( x << 16);
1083
1084 return x;
1085}
1086
1087/* popcount64 is only available on 64 bit cpus as gcc builtin */
1088/* so for this version we are lazy */
1089ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1090ecb_function_ ecb_const int
1091ecb_popcount64 (uint64_t x)
1092{
1093 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1094}
1095
1096ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1097ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1098ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1099ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1100ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1101ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1102ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1103ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1104
1105ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1106ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1107ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1108ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1109ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1110ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1111ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1112ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1113
1114#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1115 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1116 #define ecb_bswap16(x) __builtin_bswap16 (x)
1117 #else
1118 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1119 #endif
1120 #define ecb_bswap32(x) __builtin_bswap32 (x)
1121 #define ecb_bswap64(x) __builtin_bswap64 (x)
1122#elif _MSC_VER
1123 #include <stdlib.h>
1124 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1125 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1126 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1127#else
1128 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1129 ecb_function_ ecb_const uint16_t
1130 ecb_bswap16 (uint16_t x)
1131 {
1132 return ecb_rotl16 (x, 8);
1133 }
1134
1135 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1136 ecb_function_ ecb_const uint32_t
1137 ecb_bswap32 (uint32_t x)
1138 {
1139 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1140 }
1141
1142 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1143 ecb_function_ ecb_const uint64_t
1144 ecb_bswap64 (uint64_t x)
1145 {
1146 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1147 }
1148#endif
1149
1150#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1151 #define ecb_unreachable() __builtin_unreachable ()
1152#else
1153 /* this seems to work fine, but gcc always emits a warning for it :/ */
1154 ecb_inline ecb_noreturn void ecb_unreachable (void);
1155 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1156#endif
1157
1158/* try to tell the compiler that some condition is definitely true */
1159#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1160
1161ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1162ecb_inline ecb_const uint32_t
1163ecb_byteorder_helper (void)
1164{
1165 /* the union code still generates code under pressure in gcc, */
1166 /* but less than using pointers, and always seems to */
1167 /* successfully return a constant. */
1168 /* the reason why we have this horrible preprocessor mess */
1169 /* is to avoid it in all cases, at least on common architectures */
1170 /* or when using a recent enough gcc version (>= 4.6) */
1171#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1172 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1173 #define ECB_LITTLE_ENDIAN 1
1174 return 0x44332211;
1175#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1176 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1177 #define ECB_BIG_ENDIAN 1
1178 return 0x11223344;
1179#else
1180 union
1181 {
1182 uint8_t c[4];
1183 uint32_t u;
1184 } u = { 0x11, 0x22, 0x33, 0x44 };
1185 return u.u;
1186#endif
1187}
1188
1189ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1190ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1191ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1192ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1193
1194#if ECB_GCC_VERSION(3,0) || ECB_C99
1195 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1196#else
1197 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1198#endif
1199
1200#if ECB_CPP
1201 template<typename T>
1202 static inline T ecb_div_rd (T val, T div)
1203 {
1204 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1205 }
1206 template<typename T>
1207 static inline T ecb_div_ru (T val, T div)
1208 {
1209 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1210 }
1211#else
1212 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1213 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1214#endif
1215
1216#if ecb_cplusplus_does_not_suck
1217 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1218 template<typename T, int N>
1219 static inline int ecb_array_length (const T (&arr)[N])
1220 {
1221 return N;
1222 }
1223#else
1224 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1225#endif
1226
1227ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1228ecb_function_ ecb_const uint32_t
1229ecb_binary16_to_binary32 (uint32_t x)
1230{
1231 unsigned int s = (x & 0x8000) << (31 - 15);
1232 int e = (x >> 10) & 0x001f;
1233 unsigned int m = x & 0x03ff;
1234
1235 if (ecb_expect_false (e == 31))
1236 /* infinity or NaN */
1237 e = 255 - (127 - 15);
1238 else if (ecb_expect_false (!e))
1239 {
1240 if (ecb_expect_true (!m))
1241 /* zero, handled by code below by forcing e to 0 */
1242 e = 0 - (127 - 15);
1243 else
1244 {
1245 /* subnormal, renormalise */
1246 unsigned int s = 10 - ecb_ld32 (m);
1247
1248 m = (m << s) & 0x3ff; /* mask implicit bit */
1249 e -= s - 1;
1250 }
1251 }
1252
1253 /* e and m now are normalised, or zero, (or inf or nan) */
1254 e += 127 - 15;
1255
1256 return s | (e << 23) | (m << (23 - 10));
1257}
1258
1259ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1260ecb_function_ ecb_const uint16_t
1261ecb_binary32_to_binary16 (uint32_t x)
1262{
1263 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1264 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1265 unsigned int m = x & 0x007fffff;
1266
1267 x &= 0x7fffffff;
1268
1269 /* if it's within range of binary16 normals, use fast path */
1270 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1271 {
1272 /* mantissa round-to-even */
1273 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1274
1275 /* handle overflow */
1276 if (ecb_expect_false (m >= 0x00800000))
1277 {
1278 m >>= 1;
1279 e += 1;
1280 }
1281
1282 return s | (e << 10) | (m >> (23 - 10));
1283 }
1284
1285 /* handle large numbers and infinity */
1286 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1287 return s | 0x7c00;
1288
1289 /* handle zero, subnormals and small numbers */
1290 if (ecb_expect_true (x < 0x38800000))
1291 {
1292 /* zero */
1293 if (ecb_expect_true (!x))
1294 return s;
1295
1296 /* handle subnormals */
1297
1298 /* too small, will be zero */
1299 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1300 return s;
1301
1302 m |= 0x00800000; /* make implicit bit explicit */
1303
1304 /* very tricky - we need to round to the nearest e (+10) bit value */
1305 {
1306 unsigned int bits = 14 - e;
1307 unsigned int half = (1 << (bits - 1)) - 1;
1308 unsigned int even = (m >> bits) & 1;
1309
1310 /* if this overflows, we will end up with a normalised number */
1311 m = (m + half + even) >> bits;
1312 }
1313
1314 return s | m;
1315 }
1316
1317 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1318 m >>= 13;
1319
1320 return s | 0x7c00 | m | !m;
1321}
1322
1323/*******************************************************************************/
1324/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1325
1326/* basically, everything uses "ieee pure-endian" floating point numbers */
1327/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1328#if 0 \
1329 || __i386 || __i386__ \
1330 || ECB_GCC_AMD64 \
1331 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1332 || defined __s390__ || defined __s390x__ \
1333 || defined __mips__ \
1334 || defined __alpha__ \
1335 || defined __hppa__ \
1336 || defined __ia64__ \
1337 || defined __m68k__ \
1338 || defined __m88k__ \
1339 || defined __sh__ \
1340 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1341 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1342 || defined __aarch64__
1343 #define ECB_STDFP 1
1344 #include <string.h> /* for memcpy */
1345#else
1346 #define ECB_STDFP 0
1347#endif
1348
1349#ifndef ECB_NO_LIBM
1350
1351 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1352
1353 /* only the oldest of old doesn't have this one. solaris. */
1354 #ifdef INFINITY
1355 #define ECB_INFINITY INFINITY
1356 #else
1357 #define ECB_INFINITY HUGE_VAL
1358 #endif
1359
1360 #ifdef NAN
1361 #define ECB_NAN NAN
1362 #else
1363 #define ECB_NAN ECB_INFINITY
1364 #endif
1365
1366 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1367 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1368 #define ecb_frexpf(x,e) frexpf ((x), (e))
1369 #else
1370 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1371 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1372 #endif
1373
1374 /* convert a float to ieee single/binary32 */
1375 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1376 ecb_function_ ecb_const uint32_t
1377 ecb_float_to_binary32 (float x)
1378 {
1379 uint32_t r;
1380
1381 #if ECB_STDFP
1382 memcpy (&r, &x, 4);
1383 #else
1384 /* slow emulation, works for anything but -0 */
1385 uint32_t m;
1386 int e;
1387
1388 if (x == 0e0f ) return 0x00000000U;
1389 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1390 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1391 if (x != x ) return 0x7fbfffffU;
1392
1393 m = ecb_frexpf (x, &e) * 0x1000000U;
1394
1395 r = m & 0x80000000U;
1396
1397 if (r)
1398 m = -m;
1399
1400 if (e <= -126)
1401 {
1402 m &= 0xffffffU;
1403 m >>= (-125 - e);
1404 e = -126;
1405 }
1406
1407 r |= (e + 126) << 23;
1408 r |= m & 0x7fffffU;
1409 #endif
1410
1411 return r;
1412 }
1413
1414 /* converts an ieee single/binary32 to a float */
1415 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1416 ecb_function_ ecb_const float
1417 ecb_binary32_to_float (uint32_t x)
1418 {
1419 float r;
1420
1421 #if ECB_STDFP
1422 memcpy (&r, &x, 4);
1423 #else
1424 /* emulation, only works for normals and subnormals and +0 */
1425 int neg = x >> 31;
1426 int e = (x >> 23) & 0xffU;
1427
1428 x &= 0x7fffffU;
1429
1430 if (e)
1431 x |= 0x800000U;
1432 else
1433 e = 1;
1434
1435 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1436 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1437
1438 r = neg ? -r : r;
1439 #endif
1440
1441 return r;
1442 }
1443
1444 /* convert a double to ieee double/binary64 */
1445 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1446 ecb_function_ ecb_const uint64_t
1447 ecb_double_to_binary64 (double x)
1448 {
1449 uint64_t r;
1450
1451 #if ECB_STDFP
1452 memcpy (&r, &x, 8);
1453 #else
1454 /* slow emulation, works for anything but -0 */
1455 uint64_t m;
1456 int e;
1457
1458 if (x == 0e0 ) return 0x0000000000000000U;
1459 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1460 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1461 if (x != x ) return 0X7ff7ffffffffffffU;
1462
1463 m = frexp (x, &e) * 0x20000000000000U;
1464
1465 r = m & 0x8000000000000000;;
1466
1467 if (r)
1468 m = -m;
1469
1470 if (e <= -1022)
1471 {
1472 m &= 0x1fffffffffffffU;
1473 m >>= (-1021 - e);
1474 e = -1022;
1475 }
1476
1477 r |= ((uint64_t)(e + 1022)) << 52;
1478 r |= m & 0xfffffffffffffU;
1479 #endif
1480
1481 return r;
1482 }
1483
1484 /* converts an ieee double/binary64 to a double */
1485 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1486 ecb_function_ ecb_const double
1487 ecb_binary64_to_double (uint64_t x)
1488 {
1489 double r;
1490
1491 #if ECB_STDFP
1492 memcpy (&r, &x, 8);
1493 #else
1494 /* emulation, only works for normals and subnormals and +0 */
1495 int neg = x >> 63;
1496 int e = (x >> 52) & 0x7ffU;
1497
1498 x &= 0xfffffffffffffU;
1499
1500 if (e)
1501 x |= 0x10000000000000U;
1502 else
1503 e = 1;
1504
1505 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1506 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1507
1508 r = neg ? -r : r;
1509 #endif
1510
1511 return r;
1512 }
1513
1514 /* convert a float to ieee half/binary16 */
1515 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1516 ecb_function_ ecb_const uint16_t
1517 ecb_float_to_binary16 (float x)
1518 {
1519 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1520 }
1521
1522 /* convert an ieee half/binary16 to float */
1523 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1524 ecb_function_ ecb_const float
1525 ecb_binary16_to_float (uint16_t x)
1526 {
1527 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1528 }
1529
1530#endif
1531
1532#endif
1533
1534/* ECB.H END */
1535
1536#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1537/* if your architecture doesn't need memory fences, e.g. because it is
1538 * single-cpu/core, or if you use libev in a project that doesn't use libev
1539 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1540 * libev, in which cases the memory fences become nops.
1541 * alternatively, you can remove this #error and link against libpthread,
1542 * which will then provide the memory fences.
1543 */
1544# error "memory fences not defined for your architecture, please report"
1545#endif
1546
1547#ifndef ECB_MEMORY_FENCE
1548# define ECB_MEMORY_FENCE do { } while (0)
1549# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1550# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1551#endif
1552
1553#define expect_false(cond) ecb_expect_false (cond)
1554#define expect_true(cond) ecb_expect_true (cond)
1555#define noinline ecb_noinline
1556
345#define inline_size static inline 1557#define inline_size ecb_inline
346 1558
347#if EV_MINIMAL 1559#if EV_FEATURE_CODE
348# define inline_speed static noinline
349#else
350# define inline_speed static inline 1560# define inline_speed ecb_inline
1561#else
1562# define inline_speed noinline static
351#endif 1563#endif
352 1564
353#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1565#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1566
1567#if EV_MINPRI == EV_MAXPRI
1568# define ABSPRI(w) (((W)w), 0)
1569#else
354#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1570# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1571#endif
355 1572
356#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1573#define EMPTY /* required for microsofts broken pseudo-c compiler */
357#define EMPTY2(a,b) /* used to suppress some warnings */
358 1574
359typedef ev_watcher *W; 1575typedef ev_watcher *W;
360typedef ev_watcher_list *WL; 1576typedef ev_watcher_list *WL;
361typedef ev_watcher_time *WT; 1577typedef ev_watcher_time *WT;
362 1578
363#define ev_active(w) ((W)(w))->active 1579#define ev_active(w) ((W)(w))->active
364#define ev_at(w) ((WT)(w))->at 1580#define ev_at(w) ((WT)(w))->at
365 1581
1582#if EV_USE_REALTIME
1583/* sig_atomic_t is used to avoid per-thread variables or locking but still */
1584/* giving it a reasonably high chance of working on typical architectures */
1585static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1586#endif
1587
366#if EV_USE_MONOTONIC 1588#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? */ 1589static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1590#endif
1591
1592#ifndef EV_FD_TO_WIN32_HANDLE
1593# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1594#endif
1595#ifndef EV_WIN32_HANDLE_TO_FD
1596# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1597#endif
1598#ifndef EV_WIN32_CLOSE_FD
1599# define EV_WIN32_CLOSE_FD(fd) close (fd)
370#endif 1600#endif
371 1601
372#ifdef _WIN32 1602#ifdef _WIN32
373# include "ev_win32.c" 1603# include "ev_win32.c"
374#endif 1604#endif
375 1605
376/*****************************************************************************/ 1606/*****************************************************************************/
377 1607
1608#if EV_USE_LINUXAIO
1609# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
1610#endif
1611
1612/* define a suitable floor function (only used by periodics atm) */
1613
1614#if EV_USE_FLOOR
1615# include <math.h>
1616# define ev_floor(v) floor (v)
1617#else
1618
1619#include <float.h>
1620
1621/* a floor() replacement function, should be independent of ev_tstamp type */
1622noinline
1623static ev_tstamp
1624ev_floor (ev_tstamp v)
1625{
1626 /* the choice of shift factor is not terribly important */
1627#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1628 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1629#else
1630 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1631#endif
1632
1633 /* argument too large for an unsigned long? */
1634 if (expect_false (v >= shift))
1635 {
1636 ev_tstamp f;
1637
1638 if (v == v - 1.)
1639 return v; /* very large number */
1640
1641 f = shift * ev_floor (v * (1. / shift));
1642 return f + ev_floor (v - f);
1643 }
1644
1645 /* special treatment for negative args? */
1646 if (expect_false (v < 0.))
1647 {
1648 ev_tstamp f = -ev_floor (-v);
1649
1650 return f - (f == v ? 0 : 1);
1651 }
1652
1653 /* fits into an unsigned long */
1654 return (unsigned long)v;
1655}
1656
1657#endif
1658
1659/*****************************************************************************/
1660
1661#ifdef __linux
1662# include <sys/utsname.h>
1663#endif
1664
1665noinline ecb_cold
1666static unsigned int
1667ev_linux_version (void)
1668{
1669#ifdef __linux
1670 unsigned int v = 0;
1671 struct utsname buf;
1672 int i;
1673 char *p = buf.release;
1674
1675 if (uname (&buf))
1676 return 0;
1677
1678 for (i = 3+1; --i; )
1679 {
1680 unsigned int c = 0;
1681
1682 for (;;)
1683 {
1684 if (*p >= '0' && *p <= '9')
1685 c = c * 10 + *p++ - '0';
1686 else
1687 {
1688 p += *p == '.';
1689 break;
1690 }
1691 }
1692
1693 v = (v << 8) | c;
1694 }
1695
1696 return v;
1697#else
1698 return 0;
1699#endif
1700}
1701
1702/*****************************************************************************/
1703
1704#if EV_AVOID_STDIO
1705noinline ecb_cold
1706static void
1707ev_printerr (const char *msg)
1708{
1709 write (STDERR_FILENO, msg, strlen (msg));
1710}
1711#endif
1712
378static void (*syserr_cb)(const char *msg); 1713static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
379 1714
1715ecb_cold
380void 1716void
381ev_set_syserr_cb (void (*cb)(const char *msg)) 1717ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
382{ 1718{
383 syserr_cb = cb; 1719 syserr_cb = cb;
384} 1720}
385 1721
386static void noinline 1722noinline ecb_cold
1723static void
387syserr (const char *msg) 1724ev_syserr (const char *msg)
388{ 1725{
389 if (!msg) 1726 if (!msg)
390 msg = "(libev) system error"; 1727 msg = "(libev) system error";
391 1728
392 if (syserr_cb) 1729 if (syserr_cb)
393 syserr_cb (msg); 1730 syserr_cb (msg);
394 else 1731 else
395 { 1732 {
1733#if EV_AVOID_STDIO
1734 ev_printerr (msg);
1735 ev_printerr (": ");
1736 ev_printerr (strerror (errno));
1737 ev_printerr ("\n");
1738#else
396 perror (msg); 1739 perror (msg);
1740#endif
397 abort (); 1741 abort ();
398 } 1742 }
399} 1743}
400 1744
401static void * 1745static void *
402ev_realloc_emul (void *ptr, long size) 1746ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
403{ 1747{
404 /* some systems, notably openbsd and darwin, fail to properly 1748 /* some systems, notably openbsd and darwin, fail to properly
405 * implement realloc (x, 0) (as required by both ansi c-98 and 1749 * implement realloc (x, 0) (as required by both ansi c-89 and
406 * the single unix specification, so work around them here. 1750 * the single unix specification, so work around them here.
1751 * recently, also (at least) fedora and debian started breaking it,
1752 * despite documenting it otherwise.
407 */ 1753 */
408 1754
409 if (size) 1755 if (size)
410 return realloc (ptr, size); 1756 return realloc (ptr, size);
411 1757
412 free (ptr); 1758 free (ptr);
413 return 0; 1759 return 0;
414} 1760}
415 1761
416static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1762static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
417 1763
1764ecb_cold
418void 1765void
419ev_set_allocator (void *(*cb)(void *ptr, long size)) 1766ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
420{ 1767{
421 alloc = cb; 1768 alloc = cb;
422} 1769}
423 1770
424inline_speed void * 1771inline_speed void *
… …
426{ 1773{
427 ptr = alloc (ptr, size); 1774 ptr = alloc (ptr, size);
428 1775
429 if (!ptr && size) 1776 if (!ptr && size)
430 { 1777 {
1778#if EV_AVOID_STDIO
1779 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1780#else
431 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1781 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1782#endif
432 abort (); 1783 abort ();
433 } 1784 }
434 1785
435 return ptr; 1786 return ptr;
436} 1787}
… …
438#define ev_malloc(size) ev_realloc (0, (size)) 1789#define ev_malloc(size) ev_realloc (0, (size))
439#define ev_free(ptr) ev_realloc ((ptr), 0) 1790#define ev_free(ptr) ev_realloc ((ptr), 0)
440 1791
441/*****************************************************************************/ 1792/*****************************************************************************/
442 1793
1794/* set in reify when reification needed */
1795#define EV_ANFD_REIFY 1
1796
1797/* file descriptor info structure */
443typedef struct 1798typedef struct
444{ 1799{
445 WL head; 1800 WL head;
446 unsigned char events; 1801 unsigned char events; /* the events watched for */
1802 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1803 unsigned char emask; /* some backends store the actual kernel mask in here */
447 unsigned char reify; 1804 unsigned char unused;
1805#if EV_USE_EPOLL
1806 unsigned int egen; /* generation counter to counter epoll bugs */
1807#endif
448#if EV_SELECT_IS_WINSOCKET 1808#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
449 SOCKET handle; 1809 SOCKET handle;
450#endif 1810#endif
1811#if EV_USE_IOCP
1812 OVERLAPPED or, ow;
1813#endif
451} ANFD; 1814} ANFD;
452 1815
1816/* stores the pending event set for a given watcher */
453typedef struct 1817typedef struct
454{ 1818{
455 W w; 1819 W w;
456 int events; 1820 int events; /* the pending event set for the given watcher */
457} ANPENDING; 1821} ANPENDING;
458 1822
459#if EV_USE_INOTIFY 1823#if EV_USE_INOTIFY
460/* hash table entry per inotify-id */ 1824/* hash table entry per inotify-id */
461typedef struct 1825typedef struct
… …
464} ANFS; 1828} ANFS;
465#endif 1829#endif
466 1830
467/* Heap Entry */ 1831/* Heap Entry */
468#if EV_HEAP_CACHE_AT 1832#if EV_HEAP_CACHE_AT
1833 /* a heap element */
469 typedef struct { 1834 typedef struct {
470 ev_tstamp at; 1835 ev_tstamp at;
471 WT w; 1836 WT w;
472 } ANHE; 1837 } ANHE;
473 1838
474 #define ANHE_w(he) (he).w /* access watcher, read-write */ 1839 #define ANHE_w(he) (he).w /* access watcher, read-write */
475 #define ANHE_at(he) (he).at /* access cached at, read-only */ 1840 #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 */ 1841 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
477#else 1842#else
1843 /* a heap element */
478 typedef WT ANHE; 1844 typedef WT ANHE;
479 1845
480 #define ANHE_w(he) (he) 1846 #define ANHE_w(he) (he)
481 #define ANHE_at(he) (he)->at 1847 #define ANHE_at(he) (he)->at
482 #define ANHE_at_cache(he) 1848 #define ANHE_at_cache(he)
… …
493 #undef VAR 1859 #undef VAR
494 }; 1860 };
495 #include "ev_wrap.h" 1861 #include "ev_wrap.h"
496 1862
497 static struct ev_loop default_loop_struct; 1863 static struct ev_loop default_loop_struct;
498 struct ev_loop *ev_default_loop_ptr; 1864 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
499 1865
500#else 1866#else
501 1867
502 ev_tstamp ev_rt_now; 1868 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; 1869 #define VAR(name,decl) static decl;
504 #include "ev_vars.h" 1870 #include "ev_vars.h"
505 #undef VAR 1871 #undef VAR
506 1872
507 static int ev_default_loop_ptr; 1873 static int ev_default_loop_ptr;
508 1874
509#endif 1875#endif
510 1876
1877#if EV_FEATURE_API
1878# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1879# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1880# define EV_INVOKE_PENDING invoke_cb (EV_A)
1881#else
1882# define EV_RELEASE_CB (void)0
1883# define EV_ACQUIRE_CB (void)0
1884# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1885#endif
1886
1887#define EVBREAK_RECURSE 0x80
1888
511/*****************************************************************************/ 1889/*****************************************************************************/
512 1890
1891#ifndef EV_HAVE_EV_TIME
513ev_tstamp 1892ev_tstamp
514ev_time (void) 1893ev_time (void) EV_NOEXCEPT
515{ 1894{
516#if EV_USE_REALTIME 1895#if EV_USE_REALTIME
1896 if (expect_true (have_realtime))
1897 {
517 struct timespec ts; 1898 struct timespec ts;
518 clock_gettime (CLOCK_REALTIME, &ts); 1899 clock_gettime (CLOCK_REALTIME, &ts);
519 return ts.tv_sec + ts.tv_nsec * 1e-9; 1900 return ts.tv_sec + ts.tv_nsec * 1e-9;
520#else 1901 }
1902#endif
1903
521 struct timeval tv; 1904 struct timeval tv;
522 gettimeofday (&tv, 0); 1905 gettimeofday (&tv, 0);
523 return tv.tv_sec + tv.tv_usec * 1e-6; 1906 return tv.tv_sec + tv.tv_usec * 1e-6;
524#endif
525} 1907}
1908#endif
526 1909
527ev_tstamp inline_size 1910inline_size ev_tstamp
528get_clock (void) 1911get_clock (void)
529{ 1912{
530#if EV_USE_MONOTONIC 1913#if EV_USE_MONOTONIC
531 if (expect_true (have_monotonic)) 1914 if (expect_true (have_monotonic))
532 { 1915 {
… …
539 return ev_time (); 1922 return ev_time ();
540} 1923}
541 1924
542#if EV_MULTIPLICITY 1925#if EV_MULTIPLICITY
543ev_tstamp 1926ev_tstamp
544ev_now (EV_P) 1927ev_now (EV_P) EV_NOEXCEPT
545{ 1928{
546 return ev_rt_now; 1929 return ev_rt_now;
547} 1930}
548#endif 1931#endif
549 1932
550void 1933void
551ev_sleep (ev_tstamp delay) 1934ev_sleep (ev_tstamp delay) EV_NOEXCEPT
552{ 1935{
553 if (delay > 0.) 1936 if (delay > 0.)
554 { 1937 {
555#if EV_USE_NANOSLEEP 1938#if EV_USE_NANOSLEEP
556 struct timespec ts; 1939 struct timespec ts;
557 1940
558 ts.tv_sec = (time_t)delay; 1941 EV_TS_SET (ts, delay);
559 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
560
561 nanosleep (&ts, 0); 1942 nanosleep (&ts, 0);
562#elif defined(_WIN32) 1943#elif defined _WIN32
1944 /* maybe this should round up, as ms is very low resolution */
1945 /* compared to select (µs) or nanosleep (ns) */
563 Sleep ((unsigned long)(delay * 1e3)); 1946 Sleep ((unsigned long)(delay * 1e3));
564#else 1947#else
565 struct timeval tv; 1948 struct timeval tv;
566 1949
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 */ 1950 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
571 /* somehting nto guaranteed by newer posix versions, but guaranteed */ 1951 /* something not guaranteed by newer posix versions, but guaranteed */
572 /* by older ones */ 1952 /* by older ones */
1953 EV_TV_SET (tv, delay);
573 select (0, 0, 0, 0, &tv); 1954 select (0, 0, 0, 0, &tv);
574#endif 1955#endif
575 } 1956 }
576} 1957}
577 1958
578/*****************************************************************************/ 1959/*****************************************************************************/
579 1960
580#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */ 1961#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
581 1962
582int inline_size 1963/* find a suitable new size for the given array, */
1964/* hopefully by rounding to a nice-to-malloc size */
1965inline_size int
583array_nextsize (int elem, int cur, int cnt) 1966array_nextsize (int elem, int cur, int cnt)
584{ 1967{
585 int ncur = cur + 1; 1968 int ncur = cur + 1;
586 1969
587 do 1970 do
588 ncur <<= 1; 1971 ncur <<= 1;
589 while (cnt > ncur); 1972 while (cnt > ncur);
590 1973
591 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1974 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
592 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1975 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
593 { 1976 {
594 ncur *= elem; 1977 ncur *= elem;
595 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1978 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
596 ncur = ncur - sizeof (void *) * 4; 1979 ncur = ncur - sizeof (void *) * 4;
… …
598 } 1981 }
599 1982
600 return ncur; 1983 return ncur;
601} 1984}
602 1985
603static noinline void * 1986noinline ecb_cold
1987static void *
604array_realloc (int elem, void *base, int *cur, int cnt) 1988array_realloc (int elem, void *base, int *cur, int cnt)
605{ 1989{
606 *cur = array_nextsize (elem, *cur, cnt); 1990 *cur = array_nextsize (elem, *cur, cnt);
607 return ev_realloc (base, elem * *cur); 1991 return ev_realloc (base, elem * *cur);
608} 1992}
1993
1994#define array_needsize_noinit(base,count)
1995
1996#define array_needsize_zerofill(base,count) \
1997 memset ((void *)(base), 0, sizeof (*(base)) * (count))
609 1998
610#define array_needsize(type,base,cur,cnt,init) \ 1999#define array_needsize(type,base,cur,cnt,init) \
611 if (expect_false ((cnt) > (cur))) \ 2000 if (expect_false ((cnt) > (cur))) \
612 { \ 2001 { \
613 int ocur_ = (cur); \ 2002 ecb_unused int ocur_ = (cur); \
614 (base) = (type *)array_realloc \ 2003 (base) = (type *)array_realloc \
615 (sizeof (type), (base), &(cur), (cnt)); \ 2004 (sizeof (type), (base), &(cur), (cnt)); \
616 init ((base) + (ocur_), (cur) - ocur_); \ 2005 init ((base) + (ocur_), (cur) - ocur_); \
617 } 2006 }
618 2007
… …
625 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 2014 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
626 } 2015 }
627#endif 2016#endif
628 2017
629#define array_free(stem, idx) \ 2018#define array_free(stem, idx) \
630 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 2019 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
631 2020
632/*****************************************************************************/ 2021/*****************************************************************************/
633 2022
2023/* dummy callback for pending events */
634void noinline 2024noinline
2025static void
2026pendingcb (EV_P_ ev_prepare *w, int revents)
2027{
2028}
2029
2030noinline
2031void
635ev_feed_event (EV_P_ void *w, int revents) 2032ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
636{ 2033{
637 W w_ = (W)w; 2034 W w_ = (W)w;
638 int pri = ABSPRI (w_); 2035 int pri = ABSPRI (w_);
639 2036
640 if (expect_false (w_->pending)) 2037 if (expect_false (w_->pending))
641 pendings [pri][w_->pending - 1].events |= revents; 2038 pendings [pri][w_->pending - 1].events |= revents;
642 else 2039 else
643 { 2040 {
644 w_->pending = ++pendingcnt [pri]; 2041 w_->pending = ++pendingcnt [pri];
645 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2042 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
646 pendings [pri][w_->pending - 1].w = w_; 2043 pendings [pri][w_->pending - 1].w = w_;
647 pendings [pri][w_->pending - 1].events = revents; 2044 pendings [pri][w_->pending - 1].events = revents;
648 } 2045 }
649}
650 2046
651void inline_speed 2047 pendingpri = NUMPRI - 1;
2048}
2049
2050inline_speed void
2051feed_reverse (EV_P_ W w)
2052{
2053 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
2054 rfeeds [rfeedcnt++] = w;
2055}
2056
2057inline_size void
2058feed_reverse_done (EV_P_ int revents)
2059{
2060 do
2061 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
2062 while (rfeedcnt);
2063}
2064
2065inline_speed void
652queue_events (EV_P_ W *events, int eventcnt, int type) 2066queue_events (EV_P_ W *events, int eventcnt, int type)
653{ 2067{
654 int i; 2068 int i;
655 2069
656 for (i = 0; i < eventcnt; ++i) 2070 for (i = 0; i < eventcnt; ++i)
657 ev_feed_event (EV_A_ events [i], type); 2071 ev_feed_event (EV_A_ events [i], type);
658} 2072}
659 2073
660/*****************************************************************************/ 2074/*****************************************************************************/
661 2075
662void inline_size 2076inline_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) 2077fd_event_nocheck (EV_P_ int fd, int revents)
677{ 2078{
678 ANFD *anfd = anfds + fd; 2079 ANFD *anfd = anfds + fd;
679 ev_io *w; 2080 ev_io *w;
680 2081
681 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2082 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
685 if (ev) 2086 if (ev)
686 ev_feed_event (EV_A_ (W)w, ev); 2087 ev_feed_event (EV_A_ (W)w, ev);
687 } 2088 }
688} 2089}
689 2090
690void 2091/* do not submit kernel events for fds that have reify set */
2092/* because that means they changed while we were polling for new events */
2093inline_speed void
691ev_feed_fd_event (EV_P_ int fd, int revents) 2094fd_event (EV_P_ int fd, int revents)
2095{
2096 ANFD *anfd = anfds + fd;
2097
2098 if (expect_true (!anfd->reify))
2099 fd_event_nocheck (EV_A_ fd, revents);
2100}
2101
2102void
2103ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
692{ 2104{
693 if (fd >= 0 && fd < anfdmax) 2105 if (fd >= 0 && fd < anfdmax)
694 fd_event (EV_A_ fd, revents); 2106 fd_event_nocheck (EV_A_ fd, revents);
695} 2107}
696 2108
697void inline_size 2109/* make sure the external fd watch events are in-sync */
2110/* with the kernel/libev internal state */
2111inline_size void
698fd_reify (EV_P) 2112fd_reify (EV_P)
699{ 2113{
700 int i; 2114 int i;
2115
2116#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2117 for (i = 0; i < fdchangecnt; ++i)
2118 {
2119 int fd = fdchanges [i];
2120 ANFD *anfd = anfds + fd;
2121
2122 if (anfd->reify & EV__IOFDSET && anfd->head)
2123 {
2124 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2125
2126 if (handle != anfd->handle)
2127 {
2128 unsigned long arg;
2129
2130 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2131
2132 /* handle changed, but fd didn't - we need to do it in two steps */
2133 backend_modify (EV_A_ fd, anfd->events, 0);
2134 anfd->events = 0;
2135 anfd->handle = handle;
2136 }
2137 }
2138 }
2139#endif
701 2140
702 for (i = 0; i < fdchangecnt; ++i) 2141 for (i = 0; i < fdchangecnt; ++i)
703 { 2142 {
704 int fd = fdchanges [i]; 2143 int fd = fdchanges [i];
705 ANFD *anfd = anfds + fd; 2144 ANFD *anfd = anfds + fd;
706 ev_io *w; 2145 ev_io *w;
707 2146
708 unsigned char events = 0; 2147 unsigned char o_events = anfd->events;
2148 unsigned char o_reify = anfd->reify;
709 2149
710 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2150 anfd->reify = 0;
711 events |= (unsigned char)w->events;
712 2151
713#if EV_SELECT_IS_WINSOCKET 2152 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
714 if (events)
715 { 2153 {
716 unsigned long arg; 2154 anfd->events = 0;
717 #ifdef EV_FD_TO_WIN32_HANDLE 2155
718 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 2156 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
719 #else 2157 anfd->events |= (unsigned char)w->events;
720 anfd->handle = _get_osfhandle (fd); 2158
721 #endif 2159 if (o_events != anfd->events)
722 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0)); 2160 o_reify = EV__IOFDSET; /* actually |= */
723 } 2161 }
724#endif
725 2162
726 { 2163 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); 2164 backend_modify (EV_A_ fd, o_events, anfd->events);
735 }
736 } 2165 }
737 2166
738 fdchangecnt = 0; 2167 fdchangecnt = 0;
739} 2168}
740 2169
2170/* something about the given fd changed */
741void inline_size 2171inline_size
2172void
742fd_change (EV_P_ int fd, int flags) 2173fd_change (EV_P_ int fd, int flags)
743{ 2174{
744 unsigned char reify = anfds [fd].reify; 2175 unsigned char reify = anfds [fd].reify;
745 anfds [fd].reify |= flags; 2176 anfds [fd].reify |= flags;
746 2177
747 if (expect_true (!reify)) 2178 if (expect_true (!reify))
748 { 2179 {
749 ++fdchangecnt; 2180 ++fdchangecnt;
750 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2181 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
751 fdchanges [fdchangecnt - 1] = fd; 2182 fdchanges [fdchangecnt - 1] = fd;
752 } 2183 }
753} 2184}
754 2185
755void inline_speed 2186/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
2187inline_speed ecb_cold void
756fd_kill (EV_P_ int fd) 2188fd_kill (EV_P_ int fd)
757{ 2189{
758 ev_io *w; 2190 ev_io *w;
759 2191
760 while ((w = (ev_io *)anfds [fd].head)) 2192 while ((w = (ev_io *)anfds [fd].head))
… …
762 ev_io_stop (EV_A_ w); 2194 ev_io_stop (EV_A_ w);
763 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2195 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
764 } 2196 }
765} 2197}
766 2198
767int inline_size 2199/* check whether the given fd is actually valid, for error recovery */
2200inline_size ecb_cold int
768fd_valid (int fd) 2201fd_valid (int fd)
769{ 2202{
770#ifdef _WIN32 2203#ifdef _WIN32
771 return _get_osfhandle (fd) != -1; 2204 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
772#else 2205#else
773 return fcntl (fd, F_GETFD) != -1; 2206 return fcntl (fd, F_GETFD) != -1;
774#endif 2207#endif
775} 2208}
776 2209
777/* called on EBADF to verify fds */ 2210/* called on EBADF to verify fds */
778static void noinline 2211noinline ecb_cold
2212static void
779fd_ebadf (EV_P) 2213fd_ebadf (EV_P)
780{ 2214{
781 int fd; 2215 int fd;
782 2216
783 for (fd = 0; fd < anfdmax; ++fd) 2217 for (fd = 0; fd < anfdmax; ++fd)
… …
785 if (!fd_valid (fd) && errno == EBADF) 2219 if (!fd_valid (fd) && errno == EBADF)
786 fd_kill (EV_A_ fd); 2220 fd_kill (EV_A_ fd);
787} 2221}
788 2222
789/* called on ENOMEM in select/poll to kill some fds and retry */ 2223/* called on ENOMEM in select/poll to kill some fds and retry */
790static void noinline 2224noinline ecb_cold
2225static void
791fd_enomem (EV_P) 2226fd_enomem (EV_P)
792{ 2227{
793 int fd; 2228 int fd;
794 2229
795 for (fd = anfdmax; fd--; ) 2230 for (fd = anfdmax; fd--; )
796 if (anfds [fd].events) 2231 if (anfds [fd].events)
797 { 2232 {
798 fd_kill (EV_A_ fd); 2233 fd_kill (EV_A_ fd);
799 return; 2234 break;
800 } 2235 }
801} 2236}
802 2237
803/* usually called after fork if backend needs to re-arm all fds from scratch */ 2238/* usually called after fork if backend needs to re-arm all fds from scratch */
804static void noinline 2239noinline
2240static void
805fd_rearm_all (EV_P) 2241fd_rearm_all (EV_P)
806{ 2242{
807 int fd; 2243 int fd;
808 2244
809 for (fd = 0; fd < anfdmax; ++fd) 2245 for (fd = 0; fd < anfdmax; ++fd)
810 if (anfds [fd].events) 2246 if (anfds [fd].events)
811 { 2247 {
812 anfds [fd].events = 0; 2248 anfds [fd].events = 0;
2249 anfds [fd].emask = 0;
813 fd_change (EV_A_ fd, EV_IOFDSET | 1); 2250 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
814 } 2251 }
815} 2252}
816 2253
2254/* used to prepare libev internal fd's */
2255/* this is not fork-safe */
2256inline_speed void
2257fd_intern (int fd)
2258{
2259#ifdef _WIN32
2260 unsigned long arg = 1;
2261 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
2262#else
2263 fcntl (fd, F_SETFD, FD_CLOEXEC);
2264 fcntl (fd, F_SETFL, O_NONBLOCK);
2265#endif
2266}
2267
817/*****************************************************************************/ 2268/*****************************************************************************/
818 2269
819/* 2270/*
820 * the heap functions want a real array index. array index 0 uis guaranteed to not 2271 * 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 2272 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
822 * the branching factor of the d-tree. 2273 * the branching factor of the d-tree.
823 */ 2274 */
824 2275
825/* 2276/*
… …
834#define HEAP0 (DHEAP - 1) /* index of first element in heap */ 2285#define HEAP0 (DHEAP - 1) /* index of first element in heap */
835#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0) 2286#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
836#define UPHEAP_DONE(p,k) ((p) == (k)) 2287#define UPHEAP_DONE(p,k) ((p) == (k))
837 2288
838/* away from the root */ 2289/* away from the root */
839void inline_speed 2290inline_speed void
840downheap (ANHE *heap, int N, int k) 2291downheap (ANHE *heap, int N, int k)
841{ 2292{
842 ANHE he = heap [k]; 2293 ANHE he = heap [k];
843 ANHE *E = heap + N + HEAP0; 2294 ANHE *E = heap + N + HEAP0;
844 2295
… …
884#define HEAP0 1 2335#define HEAP0 1
885#define HPARENT(k) ((k) >> 1) 2336#define HPARENT(k) ((k) >> 1)
886#define UPHEAP_DONE(p,k) (!(p)) 2337#define UPHEAP_DONE(p,k) (!(p))
887 2338
888/* away from the root */ 2339/* away from the root */
889void inline_speed 2340inline_speed void
890downheap (ANHE *heap, int N, int k) 2341downheap (ANHE *heap, int N, int k)
891{ 2342{
892 ANHE he = heap [k]; 2343 ANHE he = heap [k];
893 2344
894 for (;;) 2345 for (;;)
895 { 2346 {
896 int c = k << 1; 2347 int c = k << 1;
897 2348
898 if (c > N + HEAP0 - 1) 2349 if (c >= N + HEAP0)
899 break; 2350 break;
900 2351
901 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1]) 2352 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
902 ? 1 : 0; 2353 ? 1 : 0;
903 2354
… …
914 ev_active (ANHE_w (he)) = k; 2365 ev_active (ANHE_w (he)) = k;
915} 2366}
916#endif 2367#endif
917 2368
918/* towards the root */ 2369/* towards the root */
919void inline_speed 2370inline_speed void
920upheap (ANHE *heap, int k) 2371upheap (ANHE *heap, int k)
921{ 2372{
922 ANHE he = heap [k]; 2373 ANHE he = heap [k];
923 2374
924 for (;;) 2375 for (;;)
… …
935 2386
936 heap [k] = he; 2387 heap [k] = he;
937 ev_active (ANHE_w (he)) = k; 2388 ev_active (ANHE_w (he)) = k;
938} 2389}
939 2390
940void inline_size 2391/* move an element suitably so it is in a correct place */
2392inline_size void
941adjustheap (ANHE *heap, int N, int k) 2393adjustheap (ANHE *heap, int N, int k)
942{ 2394{
943 if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k])) 2395 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
944 upheap (heap, k); 2396 upheap (heap, k);
945 else 2397 else
946 downheap (heap, N, k); 2398 downheap (heap, N, k);
947} 2399}
948 2400
949/* rebuild the heap: this function is used only once and executed rarely */ 2401/* rebuild the heap: this function is used only once and executed rarely */
950void inline_size 2402inline_size void
951reheap (ANHE *heap, int N) 2403reheap (ANHE *heap, int N)
952{ 2404{
953 int i; 2405 int i;
954 2406
955 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */ 2407 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
… …
958 upheap (heap, i + HEAP0); 2410 upheap (heap, i + HEAP0);
959} 2411}
960 2412
961/*****************************************************************************/ 2413/*****************************************************************************/
962 2414
2415/* associate signal watchers to a signal signal */
963typedef struct 2416typedef struct
964{ 2417{
2418 EV_ATOMIC_T pending;
2419#if EV_MULTIPLICITY
2420 EV_P;
2421#endif
965 WL head; 2422 WL head;
966 EV_ATOMIC_T gotsig;
967} ANSIG; 2423} ANSIG;
968 2424
969static ANSIG *signals; 2425static 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 2426
986/*****************************************************************************/ 2427/*****************************************************************************/
987 2428
988void inline_speed 2429#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 2430
1000static void noinline 2431noinline ecb_cold
2432static void
1001evpipe_init (EV_P) 2433evpipe_init (EV_P)
1002{ 2434{
1003 if (!ev_is_active (&pipeev)) 2435 if (!ev_is_active (&pipe_w))
2436 {
2437 int fds [2];
2438
2439# if EV_USE_EVENTFD
2440 fds [0] = -1;
2441 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2442 if (fds [1] < 0 && errno == EINVAL)
2443 fds [1] = eventfd (0, 0);
2444
2445 if (fds [1] < 0)
2446# endif
2447 {
2448 while (pipe (fds))
2449 ev_syserr ("(libev) error creating signal/async pipe");
2450
2451 fd_intern (fds [0]);
2452 }
2453
2454 evpipe [0] = fds [0];
2455
2456 if (evpipe [1] < 0)
2457 evpipe [1] = fds [1]; /* first call, set write fd */
2458 else
2459 {
2460 /* on subsequent calls, do not change evpipe [1] */
2461 /* so that evpipe_write can always rely on its value. */
2462 /* this branch does not do anything sensible on windows, */
2463 /* so must not be executed on windows */
2464
2465 dup2 (fds [1], evpipe [1]);
2466 close (fds [1]);
2467 }
2468
2469 fd_intern (evpipe [1]);
2470
2471 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2472 ev_io_start (EV_A_ &pipe_w);
2473 ev_unref (EV_A); /* watcher should not keep loop alive */
1004 { 2474 }
2475}
2476
2477inline_speed void
2478evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2479{
2480 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2481
2482 if (expect_true (*flag))
2483 return;
2484
2485 *flag = 1;
2486 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2487
2488 pipe_write_skipped = 1;
2489
2490 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2491
2492 if (pipe_write_wanted)
2493 {
2494 int old_errno;
2495
2496 pipe_write_skipped = 0;
2497 ECB_MEMORY_FENCE_RELEASE;
2498
2499 old_errno = errno; /* save errno because write will clobber it */
2500
1005#if EV_USE_EVENTFD 2501#if EV_USE_EVENTFD
1006 if ((evfd = eventfd (0, 0)) >= 0) 2502 if (evpipe [0] < 0)
1007 { 2503 {
1008 evpipe [0] = -1; 2504 uint64_t counter = 1;
1009 fd_intern (evfd); 2505 write (evpipe [1], &counter, sizeof (uint64_t));
1010 ev_io_set (&pipeev, evfd, EV_READ);
1011 } 2506 }
1012 else 2507 else
1013#endif 2508#endif
1014 { 2509 {
1015 while (pipe (evpipe)) 2510#ifdef _WIN32
1016 syserr ("(libev) error creating signal/async pipe"); 2511 WSABUF buf;
1017 2512 DWORD sent;
1018 fd_intern (evpipe [0]); 2513 buf.buf = (char *)&buf;
1019 fd_intern (evpipe [1]); 2514 buf.len = 1;
1020 ev_io_set (&pipeev, evpipe [0], EV_READ); 2515 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2516#else
2517 write (evpipe [1], &(evpipe [1]), 1);
2518#endif
1021 } 2519 }
1022 2520
1023 ev_io_start (EV_A_ &pipeev); 2521 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 { 2522 }
1033 int old_errno = errno; /* save errno because write might clobber it */ 2523}
1034 2524
1035 *flag = 1; 2525/* called whenever the libev signal pipe */
2526/* got some events (signal, async) */
2527static void
2528pipecb (EV_P_ ev_io *iow, int revents)
2529{
2530 int i;
1036 2531
2532 if (revents & EV_READ)
2533 {
1037#if EV_USE_EVENTFD 2534#if EV_USE_EVENTFD
1038 if (evfd >= 0) 2535 if (evpipe [0] < 0)
1039 { 2536 {
1040 uint64_t counter = 1; 2537 uint64_t counter;
1041 write (evfd, &counter, sizeof (uint64_t)); 2538 read (evpipe [1], &counter, sizeof (uint64_t));
1042 } 2539 }
1043 else 2540 else
1044#endif 2541#endif
1045 write (evpipe [1], &old_errno, 1); 2542 {
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; 2543 char dummy[4];
2544#ifdef _WIN32
2545 WSABUF buf;
2546 DWORD recvd;
2547 DWORD flags = 0;
2548 buf.buf = dummy;
2549 buf.len = sizeof (dummy);
2550 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2551#else
1064 read (evpipe [0], &dummy, 1); 2552 read (evpipe [0], &dummy, sizeof (dummy));
2553#endif
2554 }
2555 }
2556
2557 pipe_write_skipped = 0;
2558
2559 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2560
2561#if EV_SIGNAL_ENABLE
2562 if (sig_pending)
1065 } 2563 {
2564 sig_pending = 0;
1066 2565
1067 if (gotsig && ev_is_default_loop (EV_A)) 2566 ECB_MEMORY_FENCE;
1068 {
1069 int signum;
1070 gotsig = 0;
1071 2567
1072 for (signum = signalmax; signum--; ) 2568 for (i = EV_NSIG - 1; i--; )
1073 if (signals [signum].gotsig) 2569 if (expect_false (signals [i].pending))
1074 ev_feed_signal_event (EV_A_ signum + 1); 2570 ev_feed_signal_event (EV_A_ i + 1);
1075 } 2571 }
2572#endif
1076 2573
1077#if EV_ASYNC_ENABLE 2574#if EV_ASYNC_ENABLE
1078 if (gotasync) 2575 if (async_pending)
1079 { 2576 {
1080 int i; 2577 async_pending = 0;
1081 gotasync = 0; 2578
2579 ECB_MEMORY_FENCE;
1082 2580
1083 for (i = asynccnt; i--; ) 2581 for (i = asynccnt; i--; )
1084 if (asyncs [i]->sent) 2582 if (asyncs [i]->sent)
1085 { 2583 {
1086 asyncs [i]->sent = 0; 2584 asyncs [i]->sent = 0;
2585 ECB_MEMORY_FENCE_RELEASE;
1087 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2586 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1088 } 2587 }
1089 } 2588 }
1090#endif 2589#endif
1091} 2590}
1092 2591
1093/*****************************************************************************/ 2592/*****************************************************************************/
1094 2593
2594void
2595ev_feed_signal (int signum) EV_NOEXCEPT
2596{
2597#if EV_MULTIPLICITY
2598 EV_P;
2599 ECB_MEMORY_FENCE_ACQUIRE;
2600 EV_A = signals [signum - 1].loop;
2601
2602 if (!EV_A)
2603 return;
2604#endif
2605
2606 signals [signum - 1].pending = 1;
2607 evpipe_write (EV_A_ &sig_pending);
2608}
2609
1095static void 2610static void
1096ev_sighandler (int signum) 2611ev_sighandler (int signum)
1097{ 2612{
2613#ifdef _WIN32
2614 signal (signum, ev_sighandler);
2615#endif
2616
2617 ev_feed_signal (signum);
2618}
2619
2620noinline
2621void
2622ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
2623{
2624 WL w;
2625
2626 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2627 return;
2628
2629 --signum;
2630
1098#if EV_MULTIPLICITY 2631#if EV_MULTIPLICITY
1099 struct ev_loop *loop = &default_loop_struct; 2632 /* it is permissible to try to feed a signal to the wrong loop */
1100#endif 2633 /* or, likely more useful, feeding a signal nobody is waiting for */
1101 2634
1102#if _WIN32 2635 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; 2636 return;
2637#endif
1123 2638
1124 signals [signum].gotsig = 0; 2639 signals [signum].pending = 0;
2640 ECB_MEMORY_FENCE_RELEASE;
1125 2641
1126 for (w = signals [signum].head; w; w = w->next) 2642 for (w = signals [signum].head; w; w = w->next)
1127 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2643 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1128} 2644}
1129 2645
2646#if EV_USE_SIGNALFD
2647static void
2648sigfdcb (EV_P_ ev_io *iow, int revents)
2649{
2650 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2651
2652 for (;;)
2653 {
2654 ssize_t res = read (sigfd, si, sizeof (si));
2655
2656 /* not ISO-C, as res might be -1, but works with SuS */
2657 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2658 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2659
2660 if (res < (ssize_t)sizeof (si))
2661 break;
2662 }
2663}
2664#endif
2665
2666#endif
2667
1130/*****************************************************************************/ 2668/*****************************************************************************/
1131 2669
2670#if EV_CHILD_ENABLE
1132static WL childs [EV_PID_HASHSIZE]; 2671static WL childs [EV_PID_HASHSIZE];
1133
1134#ifndef _WIN32
1135 2672
1136static ev_signal childev; 2673static ev_signal childev;
1137 2674
1138#ifndef WIFCONTINUED 2675#ifndef WIFCONTINUED
1139# define WIFCONTINUED(status) 0 2676# define WIFCONTINUED(status) 0
1140#endif 2677#endif
1141 2678
1142void inline_speed 2679/* handle a single child status event */
2680inline_speed void
1143child_reap (EV_P_ int chain, int pid, int status) 2681child_reap (EV_P_ int chain, int pid, int status)
1144{ 2682{
1145 ev_child *w; 2683 ev_child *w;
1146 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 2684 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1147 2685
1148 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2686 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1149 { 2687 {
1150 if ((w->pid == pid || !w->pid) 2688 if ((w->pid == pid || !w->pid)
1151 && (!traced || (w->flags & 1))) 2689 && (!traced || (w->flags & 1)))
1152 { 2690 {
1153 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 2691 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
1160 2698
1161#ifndef WCONTINUED 2699#ifndef WCONTINUED
1162# define WCONTINUED 0 2700# define WCONTINUED 0
1163#endif 2701#endif
1164 2702
2703/* called on sigchld etc., calls waitpid */
1165static void 2704static void
1166childcb (EV_P_ ev_signal *sw, int revents) 2705childcb (EV_P_ ev_signal *sw, int revents)
1167{ 2706{
1168 int pid, status; 2707 int pid, status;
1169 2708
… …
1177 /* make sure we are called again until all children have been reaped */ 2716 /* 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 */ 2717 /* 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); 2718 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1180 2719
1181 child_reap (EV_A_ pid, pid, status); 2720 child_reap (EV_A_ pid, pid, status);
1182 if (EV_PID_HASHSIZE > 1) 2721 if ((EV_PID_HASHSIZE) > 1)
1183 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2722 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1184} 2723}
1185 2724
1186#endif 2725#endif
1187 2726
1188/*****************************************************************************/ 2727/*****************************************************************************/
1189 2728
2729#if EV_USE_IOCP
2730# include "ev_iocp.c"
2731#endif
1190#if EV_USE_PORT 2732#if EV_USE_PORT
1191# include "ev_port.c" 2733# include "ev_port.c"
1192#endif 2734#endif
1193#if EV_USE_KQUEUE 2735#if EV_USE_KQUEUE
1194# include "ev_kqueue.c" 2736# include "ev_kqueue.c"
1195#endif 2737#endif
1196#if EV_USE_EPOLL 2738#if EV_USE_EPOLL
1197# include "ev_epoll.c" 2739# include "ev_epoll.c"
1198#endif 2740#endif
2741#if EV_USE_LINUXAIO
2742# include "ev_linuxaio.c"
2743#endif
1199#if EV_USE_POLL 2744#if EV_USE_POLL
1200# include "ev_poll.c" 2745# include "ev_poll.c"
1201#endif 2746#endif
1202#if EV_USE_SELECT 2747#if EV_USE_SELECT
1203# include "ev_select.c" 2748# include "ev_select.c"
1204#endif 2749#endif
1205 2750
1206int 2751ecb_cold int
1207ev_version_major (void) 2752ev_version_major (void) EV_NOEXCEPT
1208{ 2753{
1209 return EV_VERSION_MAJOR; 2754 return EV_VERSION_MAJOR;
1210} 2755}
1211 2756
1212int 2757ecb_cold int
1213ev_version_minor (void) 2758ev_version_minor (void) EV_NOEXCEPT
1214{ 2759{
1215 return EV_VERSION_MINOR; 2760 return EV_VERSION_MINOR;
1216} 2761}
1217 2762
1218/* return true if we are running with elevated privileges and should ignore env variables */ 2763/* return true if we are running with elevated privileges and should ignore env variables */
1219int inline_size 2764inline_size ecb_cold int
1220enable_secure (void) 2765enable_secure (void)
1221{ 2766{
1222#ifdef _WIN32 2767#ifdef _WIN32
1223 return 0; 2768 return 0;
1224#else 2769#else
1225 return getuid () != geteuid () 2770 return getuid () != geteuid ()
1226 || getgid () != getegid (); 2771 || getgid () != getegid ();
1227#endif 2772#endif
1228} 2773}
1229 2774
2775ecb_cold
1230unsigned int 2776unsigned int
1231ev_supported_backends (void) 2777ev_supported_backends (void) EV_NOEXCEPT
1232{ 2778{
1233 unsigned int flags = 0; 2779 unsigned int flags = 0;
1234 2780
1235 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2781 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1236 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2782 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1237 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 2783 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2784 if (EV_USE_LINUXAIO) flags |= EVBACKEND_LINUXAIO;
1238 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 2785 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1239 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2786 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
1240 2787
1241 return flags; 2788 return flags;
1242} 2789}
1243 2790
2791ecb_cold
1244unsigned int 2792unsigned int
1245ev_recommended_backends (void) 2793ev_recommended_backends (void) EV_NOEXCEPT
1246{ 2794{
1247 unsigned int flags = ev_supported_backends (); 2795 unsigned int flags = ev_supported_backends ();
1248 2796
1249#ifndef __NetBSD__ 2797#ifndef __NetBSD__
1250 /* kqueue is borked on everything but netbsd apparently */ 2798 /* kqueue is borked on everything but netbsd apparently */
1251 /* it usually doesn't work correctly on anything but sockets and pipes */ 2799 /* it usually doesn't work correctly on anything but sockets and pipes */
1252 flags &= ~EVBACKEND_KQUEUE; 2800 flags &= ~EVBACKEND_KQUEUE;
1253#endif 2801#endif
1254#ifdef __APPLE__ 2802#ifdef __APPLE__
1255 // flags &= ~EVBACKEND_KQUEUE; for documentation 2803 /* only select works correctly on that "unix-certified" platform */
2804 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2805 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2806#endif
2807#ifdef __FreeBSD__
2808 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2809#endif
2810
2811 /* TODO: linuxaio is very experimental */
2812#if !EV_RECOMMEND_LINUXAIO
1256 flags &= ~EVBACKEND_POLL; 2813 flags &= ~EVBACKEND_LINUXAIO;
1257#endif 2814#endif
1258 2815
1259 return flags; 2816 return flags;
1260} 2817}
1261 2818
2819ecb_cold
1262unsigned int 2820unsigned int
1263ev_embeddable_backends (void) 2821ev_embeddable_backends (void) EV_NOEXCEPT
1264{ 2822{
1265 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2823 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1266 2824
1267 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2825 /* 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 */ 2826 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1269 flags &= ~EVBACKEND_EPOLL; 2827 flags &= ~EVBACKEND_EPOLL;
1270 2828
1271 return flags; 2829 return flags;
1272} 2830}
1273 2831
1274unsigned int 2832unsigned int
1275ev_backend (EV_P) 2833ev_backend (EV_P) EV_NOEXCEPT
1276{ 2834{
1277 return backend; 2835 return backend;
1278} 2836}
1279 2837
2838#if EV_FEATURE_API
1280unsigned int 2839unsigned int
1281ev_loop_count (EV_P) 2840ev_iteration (EV_P) EV_NOEXCEPT
1282{ 2841{
1283 return loop_count; 2842 return loop_count;
1284} 2843}
1285 2844
2845unsigned int
2846ev_depth (EV_P) EV_NOEXCEPT
2847{
2848 return loop_depth;
2849}
2850
1286void 2851void
1287ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2852ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1288{ 2853{
1289 io_blocktime = interval; 2854 io_blocktime = interval;
1290} 2855}
1291 2856
1292void 2857void
1293ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2858ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1294{ 2859{
1295 timeout_blocktime = interval; 2860 timeout_blocktime = interval;
1296} 2861}
1297 2862
1298static void noinline 2863void
2864ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
2865{
2866 userdata = data;
2867}
2868
2869void *
2870ev_userdata (EV_P) EV_NOEXCEPT
2871{
2872 return userdata;
2873}
2874
2875void
2876ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
2877{
2878 invoke_cb = invoke_pending_cb;
2879}
2880
2881void
2882ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
2883{
2884 release_cb = release;
2885 acquire_cb = acquire;
2886}
2887#endif
2888
2889/* initialise a loop structure, must be zero-initialised */
2890noinline ecb_cold
2891static void
1299loop_init (EV_P_ unsigned int flags) 2892loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1300{ 2893{
1301 if (!backend) 2894 if (!backend)
1302 { 2895 {
2896 origflags = flags;
2897
2898#if EV_USE_REALTIME
2899 if (!have_realtime)
2900 {
2901 struct timespec ts;
2902
2903 if (!clock_gettime (CLOCK_REALTIME, &ts))
2904 have_realtime = 1;
2905 }
2906#endif
2907
1303#if EV_USE_MONOTONIC 2908#if EV_USE_MONOTONIC
2909 if (!have_monotonic)
1304 { 2910 {
1305 struct timespec ts; 2911 struct timespec ts;
2912
1306 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2913 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1307 have_monotonic = 1; 2914 have_monotonic = 1;
1308 } 2915 }
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 2916#endif
1324 2917
1325 /* pid check not overridable via env */ 2918 /* pid check not overridable via env */
1326#ifndef _WIN32 2919#ifndef _WIN32
1327 if (flags & EVFLAG_FORKCHECK) 2920 if (flags & EVFLAG_FORKCHECK)
… …
1331 if (!(flags & EVFLAG_NOENV) 2924 if (!(flags & EVFLAG_NOENV)
1332 && !enable_secure () 2925 && !enable_secure ()
1333 && getenv ("LIBEV_FLAGS")) 2926 && getenv ("LIBEV_FLAGS"))
1334 flags = atoi (getenv ("LIBEV_FLAGS")); 2927 flags = atoi (getenv ("LIBEV_FLAGS"));
1335 2928
1336 if (!(flags & 0x0000ffffU)) 2929 ev_rt_now = ev_time ();
2930 mn_now = get_clock ();
2931 now_floor = mn_now;
2932 rtmn_diff = ev_rt_now - mn_now;
2933#if EV_FEATURE_API
2934 invoke_cb = ev_invoke_pending;
2935#endif
2936
2937 io_blocktime = 0.;
2938 timeout_blocktime = 0.;
2939 backend = 0;
2940 backend_fd = -1;
2941 sig_pending = 0;
2942#if EV_ASYNC_ENABLE
2943 async_pending = 0;
2944#endif
2945 pipe_write_skipped = 0;
2946 pipe_write_wanted = 0;
2947 evpipe [0] = -1;
2948 evpipe [1] = -1;
2949#if EV_USE_INOTIFY
2950 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2951#endif
2952#if EV_USE_SIGNALFD
2953 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2954#endif
2955
2956 if (!(flags & EVBACKEND_MASK))
1337 flags |= ev_recommended_backends (); 2957 flags |= ev_recommended_backends ();
1338 2958
2959#if EV_USE_IOCP
2960 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2961#endif
1339#if EV_USE_PORT 2962#if EV_USE_PORT
1340 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2963 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1341#endif 2964#endif
1342#if EV_USE_KQUEUE 2965#if EV_USE_KQUEUE
1343 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2966 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
2967#endif
2968#if EV_USE_LINUXAIO
2969 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
1344#endif 2970#endif
1345#if EV_USE_EPOLL 2971#if EV_USE_EPOLL
1346 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 2972 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1347#endif 2973#endif
1348#if EV_USE_POLL 2974#if EV_USE_POLL
1349 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 2975 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1350#endif 2976#endif
1351#if EV_USE_SELECT 2977#if EV_USE_SELECT
1352 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2978 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1353#endif 2979#endif
1354 2980
2981 ev_prepare_init (&pending_w, pendingcb);
2982
2983#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1355 ev_init (&pipeev, pipecb); 2984 ev_init (&pipe_w, pipecb);
1356 ev_set_priority (&pipeev, EV_MAXPRI); 2985 ev_set_priority (&pipe_w, EV_MAXPRI);
2986#endif
1357 } 2987 }
1358} 2988}
1359 2989
1360static void noinline 2990/* free up a loop structure */
2991ecb_cold
2992void
1361loop_destroy (EV_P) 2993ev_loop_destroy (EV_P)
1362{ 2994{
1363 int i; 2995 int i;
1364 2996
2997#if EV_MULTIPLICITY
2998 /* mimic free (0) */
2999 if (!EV_A)
3000 return;
3001#endif
3002
3003#if EV_CLEANUP_ENABLE
3004 /* queue cleanup watchers (and execute them) */
3005 if (expect_false (cleanupcnt))
3006 {
3007 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
3008 EV_INVOKE_PENDING;
3009 }
3010#endif
3011
3012#if EV_CHILD_ENABLE
3013 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
3014 {
3015 ev_ref (EV_A); /* child watcher */
3016 ev_signal_stop (EV_A_ &childev);
3017 }
3018#endif
3019
1365 if (ev_is_active (&pipeev)) 3020 if (ev_is_active (&pipe_w))
1366 { 3021 {
1367 ev_ref (EV_A); /* signal watcher */ 3022 /*ev_ref (EV_A);*/
1368 ev_io_stop (EV_A_ &pipeev); 3023 /*ev_io_stop (EV_A_ &pipe_w);*/
1369 3024
3025 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
3026 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
3027 }
3028
1370#if EV_USE_EVENTFD 3029#if EV_USE_SIGNALFD
1371 if (evfd >= 0) 3030 if (ev_is_active (&sigfd_w))
1372 close (evfd); 3031 close (sigfd);
1373#endif 3032#endif
1374
1375 if (evpipe [0] >= 0)
1376 {
1377 close (evpipe [0]);
1378 close (evpipe [1]);
1379 }
1380 }
1381 3033
1382#if EV_USE_INOTIFY 3034#if EV_USE_INOTIFY
1383 if (fs_fd >= 0) 3035 if (fs_fd >= 0)
1384 close (fs_fd); 3036 close (fs_fd);
1385#endif 3037#endif
1386 3038
1387 if (backend_fd >= 0) 3039 if (backend_fd >= 0)
1388 close (backend_fd); 3040 close (backend_fd);
1389 3041
3042#if EV_USE_IOCP
3043 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
3044#endif
1390#if EV_USE_PORT 3045#if EV_USE_PORT
1391 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3046 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1392#endif 3047#endif
1393#if EV_USE_KQUEUE 3048#if EV_USE_KQUEUE
1394 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3049 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3050#endif
3051#if EV_USE_LINUXAIO
3052 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
1395#endif 3053#endif
1396#if EV_USE_EPOLL 3054#if EV_USE_EPOLL
1397 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3055 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1398#endif 3056#endif
1399#if EV_USE_POLL 3057#if EV_USE_POLL
1400 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3058 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1401#endif 3059#endif
1402#if EV_USE_SELECT 3060#if EV_USE_SELECT
1403 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3061 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1404#endif 3062#endif
1405 3063
1406 for (i = NUMPRI; i--; ) 3064 for (i = NUMPRI; i--; )
1407 { 3065 {
1408 array_free (pending, [i]); 3066 array_free (pending, [i]);
1409#if EV_IDLE_ENABLE 3067#if EV_IDLE_ENABLE
1410 array_free (idle, [i]); 3068 array_free (idle, [i]);
1411#endif 3069#endif
1412 } 3070 }
1413 3071
1414 ev_free (anfds); anfdmax = 0; 3072 ev_free (anfds); anfds = 0; anfdmax = 0;
1415 3073
1416 /* have to use the microsoft-never-gets-it-right macro */ 3074 /* have to use the microsoft-never-gets-it-right macro */
3075 array_free (rfeed, EMPTY);
1417 array_free (fdchange, EMPTY); 3076 array_free (fdchange, EMPTY);
1418 array_free (timer, EMPTY); 3077 array_free (timer, EMPTY);
1419#if EV_PERIODIC_ENABLE 3078#if EV_PERIODIC_ENABLE
1420 array_free (periodic, EMPTY); 3079 array_free (periodic, EMPTY);
1421#endif 3080#endif
1422#if EV_FORK_ENABLE 3081#if EV_FORK_ENABLE
1423 array_free (fork, EMPTY); 3082 array_free (fork, EMPTY);
1424#endif 3083#endif
3084#if EV_CLEANUP_ENABLE
3085 array_free (cleanup, EMPTY);
3086#endif
1425 array_free (prepare, EMPTY); 3087 array_free (prepare, EMPTY);
1426 array_free (check, EMPTY); 3088 array_free (check, EMPTY);
1427#if EV_ASYNC_ENABLE 3089#if EV_ASYNC_ENABLE
1428 array_free (async, EMPTY); 3090 array_free (async, EMPTY);
1429#endif 3091#endif
1430 3092
1431 backend = 0; 3093 backend = 0;
3094
3095#if EV_MULTIPLICITY
3096 if (ev_is_default_loop (EV_A))
3097#endif
3098 ev_default_loop_ptr = 0;
3099#if EV_MULTIPLICITY
3100 else
3101 ev_free (EV_A);
3102#endif
1432} 3103}
1433 3104
1434#if EV_USE_INOTIFY 3105#if EV_USE_INOTIFY
1435void inline_size infy_fork (EV_P); 3106inline_size void infy_fork (EV_P);
1436#endif 3107#endif
1437 3108
1438void inline_size 3109inline_size void
1439loop_fork (EV_P) 3110loop_fork (EV_P)
1440{ 3111{
1441#if EV_USE_PORT 3112#if EV_USE_PORT
1442 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3113 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1443#endif 3114#endif
1444#if EV_USE_KQUEUE 3115#if EV_USE_KQUEUE
1445 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 3116 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3117#endif
3118#if EV_USE_LINUXAIO
3119 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
1446#endif 3120#endif
1447#if EV_USE_EPOLL 3121#if EV_USE_EPOLL
1448 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3122 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1449#endif 3123#endif
1450#if EV_USE_INOTIFY 3124#if EV_USE_INOTIFY
1451 infy_fork (EV_A); 3125 infy_fork (EV_A);
1452#endif 3126#endif
1453 3127
1454 if (ev_is_active (&pipeev)) 3128#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
3129 if (ev_is_active (&pipe_w) && postfork != 2)
1455 { 3130 {
1456 /* this "locks" the handlers against writing to the pipe */ 3131 /* 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 3132
1463 ev_ref (EV_A); 3133 ev_ref (EV_A);
1464 ev_io_stop (EV_A_ &pipeev); 3134 ev_io_stop (EV_A_ &pipe_w);
1465
1466#if EV_USE_EVENTFD
1467 if (evfd >= 0)
1468 close (evfd);
1469#endif
1470 3135
1471 if (evpipe [0] >= 0) 3136 if (evpipe [0] >= 0)
1472 { 3137 EV_WIN32_CLOSE_FD (evpipe [0]);
1473 close (evpipe [0]);
1474 close (evpipe [1]);
1475 }
1476 3138
1477 evpipe_init (EV_A); 3139 evpipe_init (EV_A);
1478 /* now iterate over everything, in case we missed something */ 3140 /* iterate over everything, in case we missed something before */
1479 pipecb (EV_A_ &pipeev, EV_READ); 3141 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1480 } 3142 }
3143#endif
1481 3144
1482 postfork = 0; 3145 postfork = 0;
1483} 3146}
1484 3147
1485#if EV_MULTIPLICITY 3148#if EV_MULTIPLICITY
1486 3149
3150ecb_cold
1487struct ev_loop * 3151struct ev_loop *
1488ev_loop_new (unsigned int flags) 3152ev_loop_new (unsigned int flags) EV_NOEXCEPT
1489{ 3153{
1490 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3154 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1491 3155
1492 memset (loop, 0, sizeof (struct ev_loop)); 3156 memset (EV_A, 0, sizeof (struct ev_loop));
1493
1494 loop_init (EV_A_ flags); 3157 loop_init (EV_A_ flags);
1495 3158
1496 if (ev_backend (EV_A)) 3159 if (ev_backend (EV_A))
1497 return loop; 3160 return EV_A;
1498 3161
3162 ev_free (EV_A);
1499 return 0; 3163 return 0;
1500} 3164}
1501 3165
1502void 3166#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 3167
1515#if EV_VERIFY 3168#if EV_VERIFY
1516static void noinline 3169noinline ecb_cold
3170static void
1517verify_watcher (EV_P_ W w) 3171verify_watcher (EV_P_ W w)
1518{ 3172{
1519 assert (("watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3173 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1520 3174
1521 if (w->pending) 3175 if (w->pending)
1522 assert (("pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3176 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1523} 3177}
1524 3178
1525static void noinline 3179noinline ecb_cold
3180static void
1526verify_heap (EV_P_ ANHE *heap, int N) 3181verify_heap (EV_P_ ANHE *heap, int N)
1527{ 3182{
1528 int i; 3183 int i;
1529 3184
1530 for (i = HEAP0; i < N + HEAP0; ++i) 3185 for (i = HEAP0; i < N + HEAP0; ++i)
1531 { 3186 {
1532 assert (("active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i)); 3187 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]))); 3188 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])))); 3189 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
1535 3190
1536 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3191 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1537 } 3192 }
1538} 3193}
1539 3194
1540static void noinline 3195noinline ecb_cold
3196static void
1541array_verify (EV_P_ W *ws, int cnt) 3197array_verify (EV_P_ W *ws, int cnt)
1542{ 3198{
1543 while (cnt--) 3199 while (cnt--)
1544 { 3200 {
1545 assert (("active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3201 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
1546 verify_watcher (EV_A_ ws [cnt]); 3202 verify_watcher (EV_A_ ws [cnt]);
1547 } 3203 }
1548} 3204}
1549#endif 3205#endif
1550 3206
1551void 3207#if EV_FEATURE_API
1552ev_loop_verify (EV_P) 3208void ecb_cold
3209ev_verify (EV_P) EV_NOEXCEPT
1553{ 3210{
1554#if EV_VERIFY 3211#if EV_VERIFY
1555 int i; 3212 int i;
1556 WL w; 3213 WL w, w2;
1557 3214
1558 assert (activecnt >= -1); 3215 assert (activecnt >= -1);
1559 3216
1560 assert (fdchangemax >= fdchangecnt); 3217 assert (fdchangemax >= fdchangecnt);
1561 for (i = 0; i < fdchangecnt; ++i) 3218 for (i = 0; i < fdchangecnt; ++i)
1562 assert (("negative fd in fdchanges", fdchanges [i] >= 0)); 3219 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1563 3220
1564 assert (anfdmax >= 0); 3221 assert (anfdmax >= 0);
1565 for (i = 0; i < anfdmax; ++i) 3222 for (i = 0; i < anfdmax; ++i)
3223 {
3224 int j = 0;
3225
1566 for (w = anfds [i].head; w; w = w->next) 3226 for (w = w2 = anfds [i].head; w; w = w->next)
1567 { 3227 {
1568 verify_watcher (EV_A_ (W)w); 3228 verify_watcher (EV_A_ (W)w);
3229
3230 if (j++ & 1)
3231 {
3232 assert (("libev: io watcher list contains a loop", w != w2));
3233 w2 = w2->next;
3234 }
3235
1569 assert (("inactive fd watcher on anfd list", ev_active (w) == 1)); 3236 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)); 3237 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1571 } 3238 }
3239 }
1572 3240
1573 assert (timermax >= timercnt); 3241 assert (timermax >= timercnt);
1574 verify_heap (EV_A_ timers, timercnt); 3242 verify_heap (EV_A_ timers, timercnt);
1575 3243
1576#if EV_PERIODIC_ENABLE 3244#if EV_PERIODIC_ENABLE
… …
1591#if EV_FORK_ENABLE 3259#if EV_FORK_ENABLE
1592 assert (forkmax >= forkcnt); 3260 assert (forkmax >= forkcnt);
1593 array_verify (EV_A_ (W *)forks, forkcnt); 3261 array_verify (EV_A_ (W *)forks, forkcnt);
1594#endif 3262#endif
1595 3263
3264#if EV_CLEANUP_ENABLE
3265 assert (cleanupmax >= cleanupcnt);
3266 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3267#endif
3268
1596#if EV_ASYNC_ENABLE 3269#if EV_ASYNC_ENABLE
1597 assert (asyncmax >= asynccnt); 3270 assert (asyncmax >= asynccnt);
1598 array_verify (EV_A_ (W *)asyncs, asynccnt); 3271 array_verify (EV_A_ (W *)asyncs, asynccnt);
1599#endif 3272#endif
1600 3273
3274#if EV_PREPARE_ENABLE
1601 assert (preparemax >= preparecnt); 3275 assert (preparemax >= preparecnt);
1602 array_verify (EV_A_ (W *)prepares, preparecnt); 3276 array_verify (EV_A_ (W *)prepares, preparecnt);
3277#endif
1603 3278
3279#if EV_CHECK_ENABLE
1604 assert (checkmax >= checkcnt); 3280 assert (checkmax >= checkcnt);
1605 array_verify (EV_A_ (W *)checks, checkcnt); 3281 array_verify (EV_A_ (W *)checks, checkcnt);
3282#endif
1606 3283
1607# if 0 3284# if 0
3285#if EV_CHILD_ENABLE
1608 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 3286 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) 3287 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3288#endif
1610# endif 3289# endif
1611#endif 3290#endif
1612} 3291}
1613 3292#endif
1614#endif /* multiplicity */
1615 3293
1616#if EV_MULTIPLICITY 3294#if EV_MULTIPLICITY
3295ecb_cold
1617struct ev_loop * 3296struct ev_loop *
1618ev_default_loop_init (unsigned int flags)
1619#else 3297#else
1620int 3298int
3299#endif
1621ev_default_loop (unsigned int flags) 3300ev_default_loop (unsigned int flags) EV_NOEXCEPT
1622#endif
1623{ 3301{
1624 if (!ev_default_loop_ptr) 3302 if (!ev_default_loop_ptr)
1625 { 3303 {
1626#if EV_MULTIPLICITY 3304#if EV_MULTIPLICITY
1627 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 3305 EV_P = ev_default_loop_ptr = &default_loop_struct;
1628#else 3306#else
1629 ev_default_loop_ptr = 1; 3307 ev_default_loop_ptr = 1;
1630#endif 3308#endif
1631 3309
1632 loop_init (EV_A_ flags); 3310 loop_init (EV_A_ flags);
1633 3311
1634 if (ev_backend (EV_A)) 3312 if (ev_backend (EV_A))
1635 { 3313 {
1636#ifndef _WIN32 3314#if EV_CHILD_ENABLE
1637 ev_signal_init (&childev, childcb, SIGCHLD); 3315 ev_signal_init (&childev, childcb, SIGCHLD);
1638 ev_set_priority (&childev, EV_MAXPRI); 3316 ev_set_priority (&childev, EV_MAXPRI);
1639 ev_signal_start (EV_A_ &childev); 3317 ev_signal_start (EV_A_ &childev);
1640 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3318 ev_unref (EV_A); /* child watcher should not keep loop alive */
1641#endif 3319#endif
… …
1646 3324
1647 return ev_default_loop_ptr; 3325 return ev_default_loop_ptr;
1648} 3326}
1649 3327
1650void 3328void
1651ev_default_destroy (void) 3329ev_loop_fork (EV_P) EV_NOEXCEPT
1652{ 3330{
1653#if EV_MULTIPLICITY 3331 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} 3332}
1675 3333
1676/*****************************************************************************/ 3334/*****************************************************************************/
1677 3335
1678void 3336void
1679ev_invoke (EV_P_ void *w, int revents) 3337ev_invoke (EV_P_ void *w, int revents)
1680{ 3338{
1681 EV_CB_INVOKE ((W)w, revents); 3339 EV_CB_INVOKE ((W)w, revents);
1682} 3340}
1683 3341
1684void inline_speed 3342unsigned int
1685call_pending (EV_P) 3343ev_pending_count (EV_P) EV_NOEXCEPT
1686{ 3344{
1687 int pri; 3345 int pri;
3346 unsigned int count = 0;
1688 3347
1689 for (pri = NUMPRI; pri--; ) 3348 for (pri = NUMPRI; pri--; )
3349 count += pendingcnt [pri];
3350
3351 return count;
3352}
3353
3354noinline
3355void
3356ev_invoke_pending (EV_P)
3357{
3358 pendingpri = NUMPRI;
3359
3360 do
3361 {
3362 --pendingpri;
3363
3364 /* pendingpri possibly gets modified in the inner loop */
1690 while (pendingcnt [pri]) 3365 while (pendingcnt [pendingpri])
1691 {
1692 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1693
1694 if (expect_true (p->w))
1695 { 3366 {
1696 /*assert (("non-pending watcher on pending list", p->w->pending));*/ 3367 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1697 3368
1698 p->w->pending = 0; 3369 p->w->pending = 0;
1699 EV_CB_INVOKE (p->w, p->events); 3370 EV_CB_INVOKE (p->w, p->events);
1700 EV_FREQUENT_CHECK; 3371 EV_FREQUENT_CHECK;
1701 } 3372 }
1702 } 3373 }
3374 while (pendingpri);
1703} 3375}
1704 3376
1705#if EV_IDLE_ENABLE 3377#if EV_IDLE_ENABLE
1706void inline_size 3378/* make idle watchers pending. this handles the "call-idle */
3379/* only when higher priorities are idle" logic */
3380inline_size void
1707idle_reify (EV_P) 3381idle_reify (EV_P)
1708{ 3382{
1709 if (expect_false (idleall)) 3383 if (expect_false (idleall))
1710 { 3384 {
1711 int pri; 3385 int pri;
… …
1723 } 3397 }
1724 } 3398 }
1725} 3399}
1726#endif 3400#endif
1727 3401
1728void inline_size 3402/* make timers pending */
3403inline_size void
1729timers_reify (EV_P) 3404timers_reify (EV_P)
1730{ 3405{
1731 EV_FREQUENT_CHECK; 3406 EV_FREQUENT_CHECK;
1732 3407
1733 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now) 3408 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
1734 { 3409 {
1735 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]); 3410 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 { 3411 {
3412 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
3413
3414 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
3415
3416 /* first reschedule or stop timer */
3417 if (w->repeat)
3418 {
1742 ev_at (w) += w->repeat; 3419 ev_at (w) += w->repeat;
1743 if (ev_at (w) < mn_now) 3420 if (ev_at (w) < mn_now)
1744 ev_at (w) = mn_now; 3421 ev_at (w) = mn_now;
1745 3422
1746 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3423 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1747 3424
1748 ANHE_at_cache (timers [HEAP0]); 3425 ANHE_at_cache (timers [HEAP0]);
1749 downheap (timers, timercnt, HEAP0); 3426 downheap (timers, timercnt, HEAP0);
3427 }
3428 else
3429 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
3430
3431 EV_FREQUENT_CHECK;
3432 feed_reverse (EV_A_ (W)w);
1750 } 3433 }
1751 else 3434 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
1752 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1753 3435
1754 EV_FREQUENT_CHECK; 3436 feed_reverse_done (EV_A_ EV_TIMER);
1755 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1756 } 3437 }
1757} 3438}
1758 3439
1759#if EV_PERIODIC_ENABLE 3440#if EV_PERIODIC_ENABLE
1760void inline_size 3441
3442noinline
3443static void
3444periodic_recalc (EV_P_ ev_periodic *w)
3445{
3446 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3447 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3448
3449 /* the above almost always errs on the low side */
3450 while (at <= ev_rt_now)
3451 {
3452 ev_tstamp nat = at + w->interval;
3453
3454 /* when resolution fails us, we use ev_rt_now */
3455 if (expect_false (nat == at))
3456 {
3457 at = ev_rt_now;
3458 break;
3459 }
3460
3461 at = nat;
3462 }
3463
3464 ev_at (w) = at;
3465}
3466
3467/* make periodics pending */
3468inline_size void
1761periodics_reify (EV_P) 3469periodics_reify (EV_P)
1762{ 3470{
1763 EV_FREQUENT_CHECK; 3471 EV_FREQUENT_CHECK;
1764 3472
1765 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3473 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
1766 { 3474 {
1767 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3475 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 { 3476 {
3477 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
3478
3479 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
3480
3481 /* first reschedule or stop timer */
3482 if (w->reschedule_cb)
3483 {
1774 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3484 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1775 3485
1776 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now)); 3486 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
1777 3487
1778 ANHE_at_cache (periodics [HEAP0]); 3488 ANHE_at_cache (periodics [HEAP0]);
1779 downheap (periodics, periodiccnt, HEAP0); 3489 downheap (periodics, periodiccnt, HEAP0);
3490 }
3491 else if (w->interval)
3492 {
3493 periodic_recalc (EV_A_ w);
3494 ANHE_at_cache (periodics [HEAP0]);
3495 downheap (periodics, periodiccnt, HEAP0);
3496 }
3497 else
3498 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
3499
3500 EV_FREQUENT_CHECK;
3501 feed_reverse (EV_A_ (W)w);
1780 } 3502 }
1781 else if (w->interval) 3503 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 3504
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); 3505 feed_reverse_done (EV_A_ EV_PERIODIC);
1805 } 3506 }
1806} 3507}
1807 3508
1808static void noinline 3509/* simply recalculate all periodics */
3510/* TODO: maybe ensure that at least one event happens when jumping forward? */
3511noinline ecb_cold
3512static void
1809periodics_reschedule (EV_P) 3513periodics_reschedule (EV_P)
1810{ 3514{
1811 int i; 3515 int i;
1812 3516
1813 /* adjust periodics after time jump */ 3517 /* adjust periodics after time jump */
… …
1816 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3520 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
1817 3521
1818 if (w->reschedule_cb) 3522 if (w->reschedule_cb)
1819 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3523 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1820 else if (w->interval) 3524 else if (w->interval)
1821 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3525 periodic_recalc (EV_A_ w);
1822 3526
1823 ANHE_at_cache (periodics [i]); 3527 ANHE_at_cache (periodics [i]);
1824 } 3528 }
1825 3529
1826 reheap (periodics, periodiccnt); 3530 reheap (periodics, periodiccnt);
1827} 3531}
1828#endif 3532#endif
1829 3533
1830void inline_speed 3534/* adjust all timers by a given offset */
3535noinline ecb_cold
3536static void
3537timers_reschedule (EV_P_ ev_tstamp adjust)
3538{
3539 int i;
3540
3541 for (i = 0; i < timercnt; ++i)
3542 {
3543 ANHE *he = timers + i + HEAP0;
3544 ANHE_w (*he)->at += adjust;
3545 ANHE_at_cache (*he);
3546 }
3547}
3548
3549/* fetch new monotonic and realtime times from the kernel */
3550/* also detect if there was a timejump, and act accordingly */
3551inline_speed void
1831time_update (EV_P_ ev_tstamp max_block) 3552time_update (EV_P_ ev_tstamp max_block)
1832{ 3553{
1833 int i;
1834
1835#if EV_USE_MONOTONIC 3554#if EV_USE_MONOTONIC
1836 if (expect_true (have_monotonic)) 3555 if (expect_true (have_monotonic))
1837 { 3556 {
3557 int i;
1838 ev_tstamp odiff = rtmn_diff; 3558 ev_tstamp odiff = rtmn_diff;
1839 3559
1840 mn_now = get_clock (); 3560 mn_now = get_clock ();
1841 3561
1842 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3562 /* 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 3578 * doesn't hurt either as we only do this on time-jumps or
1859 * in the unlikely event of having been preempted here. 3579 * in the unlikely event of having been preempted here.
1860 */ 3580 */
1861 for (i = 4; --i; ) 3581 for (i = 4; --i; )
1862 { 3582 {
3583 ev_tstamp diff;
1863 rtmn_diff = ev_rt_now - mn_now; 3584 rtmn_diff = ev_rt_now - mn_now;
1864 3585
3586 diff = odiff - rtmn_diff;
3587
1865 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3588 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1866 return; /* all is well */ 3589 return; /* all is well */
1867 3590
1868 ev_rt_now = ev_time (); 3591 ev_rt_now = ev_time ();
1869 mn_now = get_clock (); 3592 mn_now = get_clock ();
1870 now_floor = mn_now; 3593 now_floor = mn_now;
1871 } 3594 }
1872 3595
3596 /* no timer adjustment, as the monotonic clock doesn't jump */
3597 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1873# if EV_PERIODIC_ENABLE 3598# if EV_PERIODIC_ENABLE
1874 periodics_reschedule (EV_A); 3599 periodics_reschedule (EV_A);
1875# endif 3600# endif
1876 /* no timer adjustment, as the monotonic clock doesn't jump */
1877 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1878 } 3601 }
1879 else 3602 else
1880#endif 3603#endif
1881 { 3604 {
1882 ev_rt_now = ev_time (); 3605 ev_rt_now = ev_time ();
1883 3606
1884 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 3607 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1885 { 3608 {
3609 /* adjust timers. this is easy, as the offset is the same for all of them */
3610 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1886#if EV_PERIODIC_ENABLE 3611#if EV_PERIODIC_ENABLE
1887 periodics_reschedule (EV_A); 3612 periodics_reschedule (EV_A);
1888#endif 3613#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 } 3614 }
1897 3615
1898 mn_now = ev_rt_now; 3616 mn_now = ev_rt_now;
1899 } 3617 }
1900} 3618}
1901 3619
1902void 3620int
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) 3621ev_run (EV_P_ int flags)
1924{ 3622{
3623#if EV_FEATURE_API
3624 ++loop_depth;
3625#endif
3626
3627 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3628
1925 loop_done = EVUNLOOP_CANCEL; 3629 loop_done = EVBREAK_CANCEL;
1926 3630
1927 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 3631 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1928 3632
1929 do 3633 do
1930 { 3634 {
1931#if EV_VERIFY >= 2 3635#if EV_VERIFY >= 2
1932 ev_loop_verify (EV_A); 3636 ev_verify (EV_A);
1933#endif 3637#endif
1934 3638
1935#ifndef _WIN32 3639#ifndef _WIN32
1936 if (expect_false (curpid)) /* penalise the forking check even more */ 3640 if (expect_false (curpid)) /* penalise the forking check even more */
1937 if (expect_false (getpid () != curpid)) 3641 if (expect_false (getpid () != curpid))
… …
1945 /* we might have forked, so queue fork handlers */ 3649 /* we might have forked, so queue fork handlers */
1946 if (expect_false (postfork)) 3650 if (expect_false (postfork))
1947 if (forkcnt) 3651 if (forkcnt)
1948 { 3652 {
1949 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3653 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1950 call_pending (EV_A); 3654 EV_INVOKE_PENDING;
1951 } 3655 }
1952#endif 3656#endif
1953 3657
3658#if EV_PREPARE_ENABLE
1954 /* queue prepare watchers (and execute them) */ 3659 /* queue prepare watchers (and execute them) */
1955 if (expect_false (preparecnt)) 3660 if (expect_false (preparecnt))
1956 { 3661 {
1957 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3662 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1958 call_pending (EV_A); 3663 EV_INVOKE_PENDING;
1959 } 3664 }
3665#endif
1960 3666
1961 if (expect_false (!activecnt)) 3667 if (expect_false (loop_done))
1962 break; 3668 break;
1963 3669
1964 /* we might have forked, so reify kernel state if necessary */ 3670 /* we might have forked, so reify kernel state if necessary */
1965 if (expect_false (postfork)) 3671 if (expect_false (postfork))
1966 loop_fork (EV_A); 3672 loop_fork (EV_A);
… …
1971 /* calculate blocking time */ 3677 /* calculate blocking time */
1972 { 3678 {
1973 ev_tstamp waittime = 0.; 3679 ev_tstamp waittime = 0.;
1974 ev_tstamp sleeptime = 0.; 3680 ev_tstamp sleeptime = 0.;
1975 3681
3682 /* remember old timestamp for io_blocktime calculation */
3683 ev_tstamp prev_mn_now = mn_now;
3684
3685 /* update time to cancel out callback processing overhead */
3686 time_update (EV_A_ 1e100);
3687
3688 /* from now on, we want a pipe-wake-up */
3689 pipe_write_wanted = 1;
3690
3691 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3692
1976 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3693 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1977 { 3694 {
1978 /* update time to cancel out callback processing overhead */
1979 time_update (EV_A_ 1e100);
1980
1981 waittime = MAX_BLOCKTIME; 3695 waittime = MAX_BLOCKTIME;
1982 3696
1983 if (timercnt) 3697 if (timercnt)
1984 { 3698 {
1985 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3699 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1986 if (waittime > to) waittime = to; 3700 if (waittime > to) waittime = to;
1987 } 3701 }
1988 3702
1989#if EV_PERIODIC_ENABLE 3703#if EV_PERIODIC_ENABLE
1990 if (periodiccnt) 3704 if (periodiccnt)
1991 { 3705 {
1992 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3706 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1993 if (waittime > to) waittime = to; 3707 if (waittime > to) waittime = to;
1994 } 3708 }
1995#endif 3709#endif
1996 3710
3711 /* don't let timeouts decrease the waittime below timeout_blocktime */
1997 if (expect_false (waittime < timeout_blocktime)) 3712 if (expect_false (waittime < timeout_blocktime))
1998 waittime = timeout_blocktime; 3713 waittime = timeout_blocktime;
1999 3714
2000 sleeptime = waittime - backend_fudge; 3715 /* at this point, we NEED to wait, so we have to ensure */
3716 /* to pass a minimum nonzero value to the backend */
3717 if (expect_false (waittime < backend_mintime))
3718 waittime = backend_mintime;
2001 3719
3720 /* extra check because io_blocktime is commonly 0 */
2002 if (expect_true (sleeptime > io_blocktime)) 3721 if (expect_false (io_blocktime))
2003 sleeptime = io_blocktime;
2004
2005 if (sleeptime)
2006 { 3722 {
3723 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3724
3725 if (sleeptime > waittime - backend_mintime)
3726 sleeptime = waittime - backend_mintime;
3727
3728 if (expect_true (sleeptime > 0.))
3729 {
2007 ev_sleep (sleeptime); 3730 ev_sleep (sleeptime);
2008 waittime -= sleeptime; 3731 waittime -= sleeptime;
3732 }
2009 } 3733 }
2010 } 3734 }
2011 3735
3736#if EV_FEATURE_API
2012 ++loop_count; 3737 ++loop_count;
3738#endif
3739 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2013 backend_poll (EV_A_ waittime); 3740 backend_poll (EV_A_ waittime);
3741 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3742
3743 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3744
3745 ECB_MEMORY_FENCE_ACQUIRE;
3746 if (pipe_write_skipped)
3747 {
3748 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3749 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3750 }
3751
2014 3752
2015 /* update ev_rt_now, do magic */ 3753 /* update ev_rt_now, do magic */
2016 time_update (EV_A_ waittime + sleeptime); 3754 time_update (EV_A_ waittime + sleeptime);
2017 } 3755 }
2018 3756
… …
2025#if EV_IDLE_ENABLE 3763#if EV_IDLE_ENABLE
2026 /* queue idle watchers unless other events are pending */ 3764 /* queue idle watchers unless other events are pending */
2027 idle_reify (EV_A); 3765 idle_reify (EV_A);
2028#endif 3766#endif
2029 3767
3768#if EV_CHECK_ENABLE
2030 /* queue check watchers, to be executed first */ 3769 /* queue check watchers, to be executed first */
2031 if (expect_false (checkcnt)) 3770 if (expect_false (checkcnt))
2032 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3771 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3772#endif
2033 3773
2034 call_pending (EV_A); 3774 EV_INVOKE_PENDING;
2035 } 3775 }
2036 while (expect_true ( 3776 while (expect_true (
2037 activecnt 3777 activecnt
2038 && !loop_done 3778 && !loop_done
2039 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3779 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
2040 )); 3780 ));
2041 3781
2042 if (loop_done == EVUNLOOP_ONE) 3782 if (loop_done == EVBREAK_ONE)
2043 loop_done = EVUNLOOP_CANCEL; 3783 loop_done = EVBREAK_CANCEL;
2044}
2045 3784
3785#if EV_FEATURE_API
3786 --loop_depth;
3787#endif
3788
3789 return activecnt;
3790}
3791
2046void 3792void
2047ev_unloop (EV_P_ int how) 3793ev_break (EV_P_ int how) EV_NOEXCEPT
2048{ 3794{
2049 loop_done = how; 3795 loop_done = how;
2050} 3796}
2051 3797
3798void
3799ev_ref (EV_P) EV_NOEXCEPT
3800{
3801 ++activecnt;
3802}
3803
3804void
3805ev_unref (EV_P) EV_NOEXCEPT
3806{
3807 --activecnt;
3808}
3809
3810void
3811ev_now_update (EV_P) EV_NOEXCEPT
3812{
3813 time_update (EV_A_ 1e100);
3814}
3815
3816void
3817ev_suspend (EV_P) EV_NOEXCEPT
3818{
3819 ev_now_update (EV_A);
3820}
3821
3822void
3823ev_resume (EV_P) EV_NOEXCEPT
3824{
3825 ev_tstamp mn_prev = mn_now;
3826
3827 ev_now_update (EV_A);
3828 timers_reschedule (EV_A_ mn_now - mn_prev);
3829#if EV_PERIODIC_ENABLE
3830 /* TODO: really do this? */
3831 periodics_reschedule (EV_A);
3832#endif
3833}
3834
2052/*****************************************************************************/ 3835/*****************************************************************************/
3836/* singly-linked list management, used when the expected list length is short */
2053 3837
2054void inline_size 3838inline_size void
2055wlist_add (WL *head, WL elem) 3839wlist_add (WL *head, WL elem)
2056{ 3840{
2057 elem->next = *head; 3841 elem->next = *head;
2058 *head = elem; 3842 *head = elem;
2059} 3843}
2060 3844
2061void inline_size 3845inline_size void
2062wlist_del (WL *head, WL elem) 3846wlist_del (WL *head, WL elem)
2063{ 3847{
2064 while (*head) 3848 while (*head)
2065 { 3849 {
2066 if (*head == elem) 3850 if (expect_true (*head == elem))
2067 { 3851 {
2068 *head = elem->next; 3852 *head = elem->next;
2069 return; 3853 break;
2070 } 3854 }
2071 3855
2072 head = &(*head)->next; 3856 head = &(*head)->next;
2073 } 3857 }
2074} 3858}
2075 3859
2076void inline_speed 3860/* internal, faster, version of ev_clear_pending */
3861inline_speed void
2077clear_pending (EV_P_ W w) 3862clear_pending (EV_P_ W w)
2078{ 3863{
2079 if (w->pending) 3864 if (w->pending)
2080 { 3865 {
2081 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3866 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
2082 w->pending = 0; 3867 w->pending = 0;
2083 } 3868 }
2084} 3869}
2085 3870
2086int 3871int
2087ev_clear_pending (EV_P_ void *w) 3872ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2088{ 3873{
2089 W w_ = (W)w; 3874 W w_ = (W)w;
2090 int pending = w_->pending; 3875 int pending = w_->pending;
2091 3876
2092 if (expect_true (pending)) 3877 if (expect_true (pending))
2093 { 3878 {
2094 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 3879 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3880 p->w = (W)&pending_w;
2095 w_->pending = 0; 3881 w_->pending = 0;
2096 p->w = 0;
2097 return p->events; 3882 return p->events;
2098 } 3883 }
2099 else 3884 else
2100 return 0; 3885 return 0;
2101} 3886}
2102 3887
2103void inline_size 3888inline_size void
2104pri_adjust (EV_P_ W w) 3889pri_adjust (EV_P_ W w)
2105{ 3890{
2106 int pri = w->priority; 3891 int pri = ev_priority (w);
2107 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3892 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
2108 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3893 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
2109 w->priority = pri; 3894 ev_set_priority (w, pri);
2110} 3895}
2111 3896
2112void inline_speed 3897inline_speed void
2113ev_start (EV_P_ W w, int active) 3898ev_start (EV_P_ W w, int active)
2114{ 3899{
2115 pri_adjust (EV_A_ w); 3900 pri_adjust (EV_A_ w);
2116 w->active = active; 3901 w->active = active;
2117 ev_ref (EV_A); 3902 ev_ref (EV_A);
2118} 3903}
2119 3904
2120void inline_size 3905inline_size void
2121ev_stop (EV_P_ W w) 3906ev_stop (EV_P_ W w)
2122{ 3907{
2123 ev_unref (EV_A); 3908 ev_unref (EV_A);
2124 w->active = 0; 3909 w->active = 0;
2125} 3910}
2126 3911
2127/*****************************************************************************/ 3912/*****************************************************************************/
2128 3913
2129void noinline 3914noinline
3915void
2130ev_io_start (EV_P_ ev_io *w) 3916ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2131{ 3917{
2132 int fd = w->fd; 3918 int fd = w->fd;
2133 3919
2134 if (expect_false (ev_is_active (w))) 3920 if (expect_false (ev_is_active (w)))
2135 return; 3921 return;
2136 3922
2137 assert (("ev_io_start called with negative fd", fd >= 0)); 3923 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3924 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2138 3925
2139 EV_FREQUENT_CHECK; 3926 EV_FREQUENT_CHECK;
2140 3927
2141 ev_start (EV_A_ (W)w, 1); 3928 ev_start (EV_A_ (W)w, 1);
2142 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3929 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
2143 wlist_add (&anfds[fd].head, (WL)w); 3930 wlist_add (&anfds[fd].head, (WL)w);
2144 3931
3932 /* common bug, apparently */
3933 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3934
2145 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 3935 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2146 w->events &= ~EV_IOFDSET; 3936 w->events &= ~EV__IOFDSET;
2147 3937
2148 EV_FREQUENT_CHECK; 3938 EV_FREQUENT_CHECK;
2149} 3939}
2150 3940
2151void noinline 3941noinline
3942void
2152ev_io_stop (EV_P_ ev_io *w) 3943ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2153{ 3944{
2154 clear_pending (EV_A_ (W)w); 3945 clear_pending (EV_A_ (W)w);
2155 if (expect_false (!ev_is_active (w))) 3946 if (expect_false (!ev_is_active (w)))
2156 return; 3947 return;
2157 3948
2158 assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3949 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
2159 3950
2160 EV_FREQUENT_CHECK; 3951 EV_FREQUENT_CHECK;
2161 3952
2162 wlist_del (&anfds[w->fd].head, (WL)w); 3953 wlist_del (&anfds[w->fd].head, (WL)w);
2163 ev_stop (EV_A_ (W)w); 3954 ev_stop (EV_A_ (W)w);
2164 3955
2165 fd_change (EV_A_ w->fd, 1); 3956 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2166 3957
2167 EV_FREQUENT_CHECK; 3958 EV_FREQUENT_CHECK;
2168} 3959}
2169 3960
2170void noinline 3961noinline
3962void
2171ev_timer_start (EV_P_ ev_timer *w) 3963ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2172{ 3964{
2173 if (expect_false (ev_is_active (w))) 3965 if (expect_false (ev_is_active (w)))
2174 return; 3966 return;
2175 3967
2176 ev_at (w) += mn_now; 3968 ev_at (w) += mn_now;
2177 3969
2178 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3970 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
2179 3971
2180 EV_FREQUENT_CHECK; 3972 EV_FREQUENT_CHECK;
2181 3973
2182 ++timercnt; 3974 ++timercnt;
2183 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 3975 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2184 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 3976 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
2185 ANHE_w (timers [ev_active (w)]) = (WT)w; 3977 ANHE_w (timers [ev_active (w)]) = (WT)w;
2186 ANHE_at_cache (timers [ev_active (w)]); 3978 ANHE_at_cache (timers [ev_active (w)]);
2187 upheap (timers, ev_active (w)); 3979 upheap (timers, ev_active (w));
2188 3980
2189 EV_FREQUENT_CHECK; 3981 EV_FREQUENT_CHECK;
2190 3982
2191 /*assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3983 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2192} 3984}
2193 3985
2194void noinline 3986noinline
3987void
2195ev_timer_stop (EV_P_ ev_timer *w) 3988ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2196{ 3989{
2197 clear_pending (EV_A_ (W)w); 3990 clear_pending (EV_A_ (W)w);
2198 if (expect_false (!ev_is_active (w))) 3991 if (expect_false (!ev_is_active (w)))
2199 return; 3992 return;
2200 3993
2201 EV_FREQUENT_CHECK; 3994 EV_FREQUENT_CHECK;
2202 3995
2203 { 3996 {
2204 int active = ev_active (w); 3997 int active = ev_active (w);
2205 3998
2206 assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w)); 3999 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
2207 4000
2208 --timercnt; 4001 --timercnt;
2209 4002
2210 if (expect_true (active < timercnt + HEAP0)) 4003 if (expect_true (active < timercnt + HEAP0))
2211 { 4004 {
2212 timers [active] = timers [timercnt + HEAP0]; 4005 timers [active] = timers [timercnt + HEAP0];
2213 adjustheap (timers, timercnt, active); 4006 adjustheap (timers, timercnt, active);
2214 } 4007 }
2215 } 4008 }
2216 4009
2217 EV_FREQUENT_CHECK;
2218
2219 ev_at (w) -= mn_now; 4010 ev_at (w) -= mn_now;
2220 4011
2221 ev_stop (EV_A_ (W)w); 4012 ev_stop (EV_A_ (W)w);
2222}
2223 4013
4014 EV_FREQUENT_CHECK;
4015}
4016
2224void noinline 4017noinline
4018void
2225ev_timer_again (EV_P_ ev_timer *w) 4019ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2226{ 4020{
2227 EV_FREQUENT_CHECK; 4021 EV_FREQUENT_CHECK;
4022
4023 clear_pending (EV_A_ (W)w);
2228 4024
2229 if (ev_is_active (w)) 4025 if (ev_is_active (w))
2230 { 4026 {
2231 if (w->repeat) 4027 if (w->repeat)
2232 { 4028 {
… …
2244 } 4040 }
2245 4041
2246 EV_FREQUENT_CHECK; 4042 EV_FREQUENT_CHECK;
2247} 4043}
2248 4044
4045ev_tstamp
4046ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
4047{
4048 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
4049}
4050
2249#if EV_PERIODIC_ENABLE 4051#if EV_PERIODIC_ENABLE
2250void noinline 4052noinline
4053void
2251ev_periodic_start (EV_P_ ev_periodic *w) 4054ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2252{ 4055{
2253 if (expect_false (ev_is_active (w))) 4056 if (expect_false (ev_is_active (w)))
2254 return; 4057 return;
2255 4058
2256 if (w->reschedule_cb) 4059 if (w->reschedule_cb)
2257 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4060 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2258 else if (w->interval) 4061 else if (w->interval)
2259 { 4062 {
2260 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 4063 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 */ 4064 periodic_recalc (EV_A_ w);
2262 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2263 } 4065 }
2264 else 4066 else
2265 ev_at (w) = w->offset; 4067 ev_at (w) = w->offset;
2266 4068
2267 EV_FREQUENT_CHECK; 4069 EV_FREQUENT_CHECK;
2268 4070
2269 ++periodiccnt; 4071 ++periodiccnt;
2270 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); 4072 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2271 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 4073 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
2272 ANHE_w (periodics [ev_active (w)]) = (WT)w; 4074 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2273 ANHE_at_cache (periodics [ev_active (w)]); 4075 ANHE_at_cache (periodics [ev_active (w)]);
2274 upheap (periodics, ev_active (w)); 4076 upheap (periodics, ev_active (w));
2275 4077
2276 EV_FREQUENT_CHECK; 4078 EV_FREQUENT_CHECK;
2277 4079
2278 /*assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4080 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2279} 4081}
2280 4082
2281void noinline 4083noinline
4084void
2282ev_periodic_stop (EV_P_ ev_periodic *w) 4085ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2283{ 4086{
2284 clear_pending (EV_A_ (W)w); 4087 clear_pending (EV_A_ (W)w);
2285 if (expect_false (!ev_is_active (w))) 4088 if (expect_false (!ev_is_active (w)))
2286 return; 4089 return;
2287 4090
2288 EV_FREQUENT_CHECK; 4091 EV_FREQUENT_CHECK;
2289 4092
2290 { 4093 {
2291 int active = ev_active (w); 4094 int active = ev_active (w);
2292 4095
2293 assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w)); 4096 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
2294 4097
2295 --periodiccnt; 4098 --periodiccnt;
2296 4099
2297 if (expect_true (active < periodiccnt + HEAP0)) 4100 if (expect_true (active < periodiccnt + HEAP0))
2298 { 4101 {
2299 periodics [active] = periodics [periodiccnt + HEAP0]; 4102 periodics [active] = periodics [periodiccnt + HEAP0];
2300 adjustheap (periodics, periodiccnt, active); 4103 adjustheap (periodics, periodiccnt, active);
2301 } 4104 }
2302 } 4105 }
2303 4106
2304 EV_FREQUENT_CHECK;
2305
2306 ev_stop (EV_A_ (W)w); 4107 ev_stop (EV_A_ (W)w);
2307}
2308 4108
4109 EV_FREQUENT_CHECK;
4110}
4111
2309void noinline 4112noinline
4113void
2310ev_periodic_again (EV_P_ ev_periodic *w) 4114ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2311{ 4115{
2312 /* TODO: use adjustheap and recalculation */ 4116 /* TODO: use adjustheap and recalculation */
2313 ev_periodic_stop (EV_A_ w); 4117 ev_periodic_stop (EV_A_ w);
2314 ev_periodic_start (EV_A_ w); 4118 ev_periodic_start (EV_A_ w);
2315} 4119}
… …
2317 4121
2318#ifndef SA_RESTART 4122#ifndef SA_RESTART
2319# define SA_RESTART 0 4123# define SA_RESTART 0
2320#endif 4124#endif
2321 4125
4126#if EV_SIGNAL_ENABLE
4127
2322void noinline 4128noinline
4129void
2323ev_signal_start (EV_P_ ev_signal *w) 4130ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2324{ 4131{
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))) 4132 if (expect_false (ev_is_active (w)))
2329 return; 4133 return;
2330 4134
2331 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 4135 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
2332 4136
2333 evpipe_init (EV_A); 4137#if EV_MULTIPLICITY
4138 assert (("libev: a signal must not be attached to two different loops",
4139 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2334 4140
2335 EV_FREQUENT_CHECK; 4141 signals [w->signum - 1].loop = EV_A;
4142 ECB_MEMORY_FENCE_RELEASE;
4143#endif
2336 4144
4145 EV_FREQUENT_CHECK;
4146
4147#if EV_USE_SIGNALFD
4148 if (sigfd == -2)
2337 { 4149 {
2338#ifndef _WIN32 4150 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2339 sigset_t full, prev; 4151 if (sigfd < 0 && errno == EINVAL)
2340 sigfillset (&full); 4152 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2341 sigprocmask (SIG_SETMASK, &full, &prev);
2342#endif
2343 4153
2344 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 4154 if (sigfd >= 0)
4155 {
4156 fd_intern (sigfd); /* doing it twice will not hurt */
2345 4157
2346#ifndef _WIN32 4158 sigemptyset (&sigfd_set);
2347 sigprocmask (SIG_SETMASK, &prev, 0); 4159
2348#endif 4160 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
4161 ev_set_priority (&sigfd_w, EV_MAXPRI);
4162 ev_io_start (EV_A_ &sigfd_w);
4163 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
4164 }
2349 } 4165 }
4166
4167 if (sigfd >= 0)
4168 {
4169 /* TODO: check .head */
4170 sigaddset (&sigfd_set, w->signum);
4171 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
4172
4173 signalfd (sigfd, &sigfd_set, 0);
4174 }
4175#endif
2350 4176
2351 ev_start (EV_A_ (W)w, 1); 4177 ev_start (EV_A_ (W)w, 1);
2352 wlist_add (&signals [w->signum - 1].head, (WL)w); 4178 wlist_add (&signals [w->signum - 1].head, (WL)w);
2353 4179
2354 if (!((WL)w)->next) 4180 if (!((WL)w)->next)
4181# if EV_USE_SIGNALFD
4182 if (sigfd < 0) /*TODO*/
4183# endif
2355 { 4184 {
2356#if _WIN32 4185# ifdef _WIN32
4186 evpipe_init (EV_A);
4187
2357 signal (w->signum, ev_sighandler); 4188 signal (w->signum, ev_sighandler);
2358#else 4189# else
2359 struct sigaction sa; 4190 struct sigaction sa;
4191
4192 evpipe_init (EV_A);
4193
2360 sa.sa_handler = ev_sighandler; 4194 sa.sa_handler = ev_sighandler;
2361 sigfillset (&sa.sa_mask); 4195 sigfillset (&sa.sa_mask);
2362 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4196 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2363 sigaction (w->signum, &sa, 0); 4197 sigaction (w->signum, &sa, 0);
4198
4199 if (origflags & EVFLAG_NOSIGMASK)
4200 {
4201 sigemptyset (&sa.sa_mask);
4202 sigaddset (&sa.sa_mask, w->signum);
4203 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4204 }
2364#endif 4205#endif
2365 } 4206 }
2366 4207
2367 EV_FREQUENT_CHECK; 4208 EV_FREQUENT_CHECK;
2368} 4209}
2369 4210
2370void noinline 4211noinline
4212void
2371ev_signal_stop (EV_P_ ev_signal *w) 4213ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
2372{ 4214{
2373 clear_pending (EV_A_ (W)w); 4215 clear_pending (EV_A_ (W)w);
2374 if (expect_false (!ev_is_active (w))) 4216 if (expect_false (!ev_is_active (w)))
2375 return; 4217 return;
2376 4218
… …
2378 4220
2379 wlist_del (&signals [w->signum - 1].head, (WL)w); 4221 wlist_del (&signals [w->signum - 1].head, (WL)w);
2380 ev_stop (EV_A_ (W)w); 4222 ev_stop (EV_A_ (W)w);
2381 4223
2382 if (!signals [w->signum - 1].head) 4224 if (!signals [w->signum - 1].head)
2383 signal (w->signum, SIG_DFL); 4225 {
2384
2385 EV_FREQUENT_CHECK;
2386}
2387
2388void
2389ev_child_start (EV_P_ ev_child *w)
2390{
2391#if EV_MULTIPLICITY 4226#if EV_MULTIPLICITY
4227 signals [w->signum - 1].loop = 0; /* unattach from signal */
4228#endif
4229#if EV_USE_SIGNALFD
4230 if (sigfd >= 0)
4231 {
4232 sigset_t ss;
4233
4234 sigemptyset (&ss);
4235 sigaddset (&ss, w->signum);
4236 sigdelset (&sigfd_set, w->signum);
4237
4238 signalfd (sigfd, &sigfd_set, 0);
4239 sigprocmask (SIG_UNBLOCK, &ss, 0);
4240 }
4241 else
4242#endif
4243 signal (w->signum, SIG_DFL);
4244 }
4245
4246 EV_FREQUENT_CHECK;
4247}
4248
4249#endif
4250
4251#if EV_CHILD_ENABLE
4252
4253void
4254ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
4255{
4256#if EV_MULTIPLICITY
2392 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4257 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2393#endif 4258#endif
2394 if (expect_false (ev_is_active (w))) 4259 if (expect_false (ev_is_active (w)))
2395 return; 4260 return;
2396 4261
2397 EV_FREQUENT_CHECK; 4262 EV_FREQUENT_CHECK;
2398 4263
2399 ev_start (EV_A_ (W)w, 1); 4264 ev_start (EV_A_ (W)w, 1);
2400 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4265 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2401 4266
2402 EV_FREQUENT_CHECK; 4267 EV_FREQUENT_CHECK;
2403} 4268}
2404 4269
2405void 4270void
2406ev_child_stop (EV_P_ ev_child *w) 4271ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
2407{ 4272{
2408 clear_pending (EV_A_ (W)w); 4273 clear_pending (EV_A_ (W)w);
2409 if (expect_false (!ev_is_active (w))) 4274 if (expect_false (!ev_is_active (w)))
2410 return; 4275 return;
2411 4276
2412 EV_FREQUENT_CHECK; 4277 EV_FREQUENT_CHECK;
2413 4278
2414 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4279 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2415 ev_stop (EV_A_ (W)w); 4280 ev_stop (EV_A_ (W)w);
2416 4281
2417 EV_FREQUENT_CHECK; 4282 EV_FREQUENT_CHECK;
2418} 4283}
4284
4285#endif
2419 4286
2420#if EV_STAT_ENABLE 4287#if EV_STAT_ENABLE
2421 4288
2422# ifdef _WIN32 4289# ifdef _WIN32
2423# undef lstat 4290# undef lstat
2424# define lstat(a,b) _stati64 (a,b) 4291# define lstat(a,b) _stati64 (a,b)
2425# endif 4292# endif
2426 4293
2427#define DEF_STAT_INTERVAL 5.0074891 4294#define DEF_STAT_INTERVAL 5.0074891
4295#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2428#define MIN_STAT_INTERVAL 0.1074891 4296#define MIN_STAT_INTERVAL 0.1074891
2429 4297
2430static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4298noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2431 4299
2432#if EV_USE_INOTIFY 4300#if EV_USE_INOTIFY
2433# define EV_INOTIFY_BUFSIZE 8192
2434 4301
2435static void noinline 4302/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
4303# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
4304
4305noinline
4306static void
2436infy_add (EV_P_ ev_stat *w) 4307infy_add (EV_P_ ev_stat *w)
2437{ 4308{
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); 4309 w->wd = inotify_add_watch (fs_fd, w->path,
4310 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4311 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4312 | IN_DONT_FOLLOW | IN_MASK_ADD);
2439 4313
2440 if (w->wd < 0) 4314 if (w->wd >= 0)
4315 {
4316 struct statfs sfs;
4317
4318 /* now local changes will be tracked by inotify, but remote changes won't */
4319 /* unless the filesystem is known to be local, we therefore still poll */
4320 /* also do poll on <2.6.25, but with normal frequency */
4321
4322 if (!fs_2625)
4323 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4324 else if (!statfs (w->path, &sfs)
4325 && (sfs.f_type == 0x1373 /* devfs */
4326 || sfs.f_type == 0x4006 /* fat */
4327 || sfs.f_type == 0x4d44 /* msdos */
4328 || sfs.f_type == 0xEF53 /* ext2/3 */
4329 || sfs.f_type == 0x72b6 /* jffs2 */
4330 || sfs.f_type == 0x858458f6 /* ramfs */
4331 || sfs.f_type == 0x5346544e /* ntfs */
4332 || sfs.f_type == 0x3153464a /* jfs */
4333 || sfs.f_type == 0x9123683e /* btrfs */
4334 || sfs.f_type == 0x52654973 /* reiser3 */
4335 || sfs.f_type == 0x01021994 /* tmpfs */
4336 || sfs.f_type == 0x58465342 /* xfs */))
4337 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4338 else
4339 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2441 { 4340 }
2442 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 4341 else
4342 {
4343 /* can't use inotify, continue to stat */
4344 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2443 4345
2444 /* monitor some parent directory for speedup hints */ 4346 /* if path is not there, monitor some parent directory for speedup hints */
2445 /* note that exceeding the hardcoded limit is not a correctness issue, */ 4347 /* note that exceeding the hardcoded path limit is not a correctness issue, */
2446 /* but an efficiency issue only */ 4348 /* but an efficiency issue only */
2447 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 4349 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2448 { 4350 {
2449 char path [4096]; 4351 char path [4096];
2450 strcpy (path, w->path); 4352 strcpy (path, w->path);
… …
2454 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 4356 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2455 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 4357 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2456 4358
2457 char *pend = strrchr (path, '/'); 4359 char *pend = strrchr (path, '/');
2458 4360
2459 if (!pend) 4361 if (!pend || pend == path)
2460 break; /* whoops, no '/', complain to your admin */ 4362 break;
2461 4363
2462 *pend = 0; 4364 *pend = 0;
2463 w->wd = inotify_add_watch (fs_fd, path, mask); 4365 w->wd = inotify_add_watch (fs_fd, path, mask);
2464 } 4366 }
2465 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4367 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2466 } 4368 }
2467 } 4369 }
2468 else
2469 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2470 4370
2471 if (w->wd >= 0) 4371 if (w->wd >= 0)
2472 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4372 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2473}
2474 4373
2475static void noinline 4374 /* now re-arm timer, if required */
4375 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4376 ev_timer_again (EV_A_ &w->timer);
4377 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4378}
4379
4380noinline
4381static void
2476infy_del (EV_P_ ev_stat *w) 4382infy_del (EV_P_ ev_stat *w)
2477{ 4383{
2478 int slot; 4384 int slot;
2479 int wd = w->wd; 4385 int wd = w->wd;
2480 4386
2481 if (wd < 0) 4387 if (wd < 0)
2482 return; 4388 return;
2483 4389
2484 w->wd = -2; 4390 w->wd = -2;
2485 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 4391 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2486 wlist_del (&fs_hash [slot].head, (WL)w); 4392 wlist_del (&fs_hash [slot].head, (WL)w);
2487 4393
2488 /* remove this watcher, if others are watching it, they will rearm */ 4394 /* remove this watcher, if others are watching it, they will rearm */
2489 inotify_rm_watch (fs_fd, wd); 4395 inotify_rm_watch (fs_fd, wd);
2490} 4396}
2491 4397
2492static void noinline 4398noinline
4399static void
2493infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4400infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2494{ 4401{
2495 if (slot < 0) 4402 if (slot < 0)
2496 /* overflow, need to check for all hahs slots */ 4403 /* overflow, need to check for all hash slots */
2497 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4404 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2498 infy_wd (EV_A_ slot, wd, ev); 4405 infy_wd (EV_A_ slot, wd, ev);
2499 else 4406 else
2500 { 4407 {
2501 WL w_; 4408 WL w_;
2502 4409
2503 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 4410 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2504 { 4411 {
2505 ev_stat *w = (ev_stat *)w_; 4412 ev_stat *w = (ev_stat *)w_;
2506 w_ = w_->next; /* lets us remove this watcher and all before it */ 4413 w_ = w_->next; /* lets us remove this watcher and all before it */
2507 4414
2508 if (w->wd == wd || wd == -1) 4415 if (w->wd == wd || wd == -1)
2509 { 4416 {
2510 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 4417 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2511 { 4418 {
4419 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2512 w->wd = -1; 4420 w->wd = -1;
2513 infy_add (EV_A_ w); /* re-add, no matter what */ 4421 infy_add (EV_A_ w); /* re-add, no matter what */
2514 } 4422 }
2515 4423
2516 stat_timer_cb (EV_A_ &w->timer, 0); 4424 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2521 4429
2522static void 4430static void
2523infy_cb (EV_P_ ev_io *w, int revents) 4431infy_cb (EV_P_ ev_io *w, int revents)
2524{ 4432{
2525 char buf [EV_INOTIFY_BUFSIZE]; 4433 char buf [EV_INOTIFY_BUFSIZE];
2526 struct inotify_event *ev = (struct inotify_event *)buf;
2527 int ofs; 4434 int ofs;
2528 int len = read (fs_fd, buf, sizeof (buf)); 4435 int len = read (fs_fd, buf, sizeof (buf));
2529 4436
2530 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 4437 for (ofs = 0; ofs < len; )
4438 {
4439 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2531 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4440 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4441 ofs += sizeof (struct inotify_event) + ev->len;
4442 }
2532} 4443}
2533 4444
2534void inline_size 4445inline_size ecb_cold
4446void
4447ev_check_2625 (EV_P)
4448{
4449 /* kernels < 2.6.25 are borked
4450 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4451 */
4452 if (ev_linux_version () < 0x020619)
4453 return;
4454
4455 fs_2625 = 1;
4456}
4457
4458inline_size int
4459infy_newfd (void)
4460{
4461#if defined IN_CLOEXEC && defined IN_NONBLOCK
4462 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4463 if (fd >= 0)
4464 return fd;
4465#endif
4466 return inotify_init ();
4467}
4468
4469inline_size void
2535infy_init (EV_P) 4470infy_init (EV_P)
2536{ 4471{
2537 if (fs_fd != -2) 4472 if (fs_fd != -2)
2538 return; 4473 return;
2539 4474
4475 fs_fd = -1;
4476
4477 ev_check_2625 (EV_A);
4478
2540 fs_fd = inotify_init (); 4479 fs_fd = infy_newfd ();
2541 4480
2542 if (fs_fd >= 0) 4481 if (fs_fd >= 0)
2543 { 4482 {
4483 fd_intern (fs_fd);
2544 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 4484 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2545 ev_set_priority (&fs_w, EV_MAXPRI); 4485 ev_set_priority (&fs_w, EV_MAXPRI);
2546 ev_io_start (EV_A_ &fs_w); 4486 ev_io_start (EV_A_ &fs_w);
4487 ev_unref (EV_A);
2547 } 4488 }
2548} 4489}
2549 4490
2550void inline_size 4491inline_size void
2551infy_fork (EV_P) 4492infy_fork (EV_P)
2552{ 4493{
2553 int slot; 4494 int slot;
2554 4495
2555 if (fs_fd < 0) 4496 if (fs_fd < 0)
2556 return; 4497 return;
2557 4498
4499 ev_ref (EV_A);
4500 ev_io_stop (EV_A_ &fs_w);
2558 close (fs_fd); 4501 close (fs_fd);
2559 fs_fd = inotify_init (); 4502 fs_fd = infy_newfd ();
2560 4503
4504 if (fs_fd >= 0)
4505 {
4506 fd_intern (fs_fd);
4507 ev_io_set (&fs_w, fs_fd, EV_READ);
4508 ev_io_start (EV_A_ &fs_w);
4509 ev_unref (EV_A);
4510 }
4511
2561 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4512 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2562 { 4513 {
2563 WL w_ = fs_hash [slot].head; 4514 WL w_ = fs_hash [slot].head;
2564 fs_hash [slot].head = 0; 4515 fs_hash [slot].head = 0;
2565 4516
2566 while (w_) 4517 while (w_)
… …
2571 w->wd = -1; 4522 w->wd = -1;
2572 4523
2573 if (fs_fd >= 0) 4524 if (fs_fd >= 0)
2574 infy_add (EV_A_ w); /* re-add, no matter what */ 4525 infy_add (EV_A_ w); /* re-add, no matter what */
2575 else 4526 else
4527 {
4528 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4529 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2576 ev_timer_start (EV_A_ &w->timer); 4530 ev_timer_again (EV_A_ &w->timer);
4531 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4532 }
2577 } 4533 }
2578
2579 } 4534 }
2580} 4535}
2581 4536
2582#endif 4537#endif
2583 4538
… …
2586#else 4541#else
2587# define EV_LSTAT(p,b) lstat (p, b) 4542# define EV_LSTAT(p,b) lstat (p, b)
2588#endif 4543#endif
2589 4544
2590void 4545void
2591ev_stat_stat (EV_P_ ev_stat *w) 4546ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
2592{ 4547{
2593 if (lstat (w->path, &w->attr) < 0) 4548 if (lstat (w->path, &w->attr) < 0)
2594 w->attr.st_nlink = 0; 4549 w->attr.st_nlink = 0;
2595 else if (!w->attr.st_nlink) 4550 else if (!w->attr.st_nlink)
2596 w->attr.st_nlink = 1; 4551 w->attr.st_nlink = 1;
2597} 4552}
2598 4553
2599static void noinline 4554noinline
4555static void
2600stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4556stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2601{ 4557{
2602 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4558 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2603 4559
2604 /* we copy this here each the time so that */ 4560 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); 4561 ev_stat_stat (EV_A_ w);
2608 4562
2609 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 4563 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2610 if ( 4564 if (
2611 w->prev.st_dev != w->attr.st_dev 4565 prev.st_dev != w->attr.st_dev
2612 || w->prev.st_ino != w->attr.st_ino 4566 || prev.st_ino != w->attr.st_ino
2613 || w->prev.st_mode != w->attr.st_mode 4567 || prev.st_mode != w->attr.st_mode
2614 || w->prev.st_nlink != w->attr.st_nlink 4568 || prev.st_nlink != w->attr.st_nlink
2615 || w->prev.st_uid != w->attr.st_uid 4569 || prev.st_uid != w->attr.st_uid
2616 || w->prev.st_gid != w->attr.st_gid 4570 || prev.st_gid != w->attr.st_gid
2617 || w->prev.st_rdev != w->attr.st_rdev 4571 || prev.st_rdev != w->attr.st_rdev
2618 || w->prev.st_size != w->attr.st_size 4572 || prev.st_size != w->attr.st_size
2619 || w->prev.st_atime != w->attr.st_atime 4573 || prev.st_atime != w->attr.st_atime
2620 || w->prev.st_mtime != w->attr.st_mtime 4574 || prev.st_mtime != w->attr.st_mtime
2621 || w->prev.st_ctime != w->attr.st_ctime 4575 || prev.st_ctime != w->attr.st_ctime
2622 ) { 4576 ) {
4577 /* we only update w->prev on actual differences */
4578 /* in case we test more often than invoke the callback, */
4579 /* to ensure that prev is always different to attr */
4580 w->prev = prev;
4581
2623 #if EV_USE_INOTIFY 4582 #if EV_USE_INOTIFY
4583 if (fs_fd >= 0)
4584 {
2624 infy_del (EV_A_ w); 4585 infy_del (EV_A_ w);
2625 infy_add (EV_A_ w); 4586 infy_add (EV_A_ w);
2626 ev_stat_stat (EV_A_ w); /* avoid race... */ 4587 ev_stat_stat (EV_A_ w); /* avoid race... */
4588 }
2627 #endif 4589 #endif
2628 4590
2629 ev_feed_event (EV_A_ w, EV_STAT); 4591 ev_feed_event (EV_A_ w, EV_STAT);
2630 } 4592 }
2631} 4593}
2632 4594
2633void 4595void
2634ev_stat_start (EV_P_ ev_stat *w) 4596ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
2635{ 4597{
2636 if (expect_false (ev_is_active (w))) 4598 if (expect_false (ev_is_active (w)))
2637 return; 4599 return;
2638 4600
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); 4601 ev_stat_stat (EV_A_ w);
2644 4602
4603 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2645 if (w->interval < MIN_STAT_INTERVAL) 4604 w->interval = MIN_STAT_INTERVAL;
2646 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2647 4605
2648 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 4606 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)); 4607 ev_set_priority (&w->timer, ev_priority (w));
2650 4608
2651#if EV_USE_INOTIFY 4609#if EV_USE_INOTIFY
2652 infy_init (EV_A); 4610 infy_init (EV_A);
2653 4611
2654 if (fs_fd >= 0) 4612 if (fs_fd >= 0)
2655 infy_add (EV_A_ w); 4613 infy_add (EV_A_ w);
2656 else 4614 else
2657#endif 4615#endif
4616 {
2658 ev_timer_start (EV_A_ &w->timer); 4617 ev_timer_again (EV_A_ &w->timer);
4618 ev_unref (EV_A);
4619 }
2659 4620
2660 ev_start (EV_A_ (W)w, 1); 4621 ev_start (EV_A_ (W)w, 1);
2661 4622
2662 EV_FREQUENT_CHECK; 4623 EV_FREQUENT_CHECK;
2663} 4624}
2664 4625
2665void 4626void
2666ev_stat_stop (EV_P_ ev_stat *w) 4627ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
2667{ 4628{
2668 clear_pending (EV_A_ (W)w); 4629 clear_pending (EV_A_ (W)w);
2669 if (expect_false (!ev_is_active (w))) 4630 if (expect_false (!ev_is_active (w)))
2670 return; 4631 return;
2671 4632
2672 EV_FREQUENT_CHECK; 4633 EV_FREQUENT_CHECK;
2673 4634
2674#if EV_USE_INOTIFY 4635#if EV_USE_INOTIFY
2675 infy_del (EV_A_ w); 4636 infy_del (EV_A_ w);
2676#endif 4637#endif
4638
4639 if (ev_is_active (&w->timer))
4640 {
4641 ev_ref (EV_A);
2677 ev_timer_stop (EV_A_ &w->timer); 4642 ev_timer_stop (EV_A_ &w->timer);
4643 }
2678 4644
2679 ev_stop (EV_A_ (W)w); 4645 ev_stop (EV_A_ (W)w);
2680 4646
2681 EV_FREQUENT_CHECK; 4647 EV_FREQUENT_CHECK;
2682} 4648}
2683#endif 4649#endif
2684 4650
2685#if EV_IDLE_ENABLE 4651#if EV_IDLE_ENABLE
2686void 4652void
2687ev_idle_start (EV_P_ ev_idle *w) 4653ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
2688{ 4654{
2689 if (expect_false (ev_is_active (w))) 4655 if (expect_false (ev_is_active (w)))
2690 return; 4656 return;
2691 4657
2692 pri_adjust (EV_A_ (W)w); 4658 pri_adjust (EV_A_ (W)w);
… …
2697 int active = ++idlecnt [ABSPRI (w)]; 4663 int active = ++idlecnt [ABSPRI (w)];
2698 4664
2699 ++idleall; 4665 ++idleall;
2700 ev_start (EV_A_ (W)w, active); 4666 ev_start (EV_A_ (W)w, active);
2701 4667
2702 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4668 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
2703 idles [ABSPRI (w)][active - 1] = w; 4669 idles [ABSPRI (w)][active - 1] = w;
2704 } 4670 }
2705 4671
2706 EV_FREQUENT_CHECK; 4672 EV_FREQUENT_CHECK;
2707} 4673}
2708 4674
2709void 4675void
2710ev_idle_stop (EV_P_ ev_idle *w) 4676ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
2711{ 4677{
2712 clear_pending (EV_A_ (W)w); 4678 clear_pending (EV_A_ (W)w);
2713 if (expect_false (!ev_is_active (w))) 4679 if (expect_false (!ev_is_active (w)))
2714 return; 4680 return;
2715 4681
… …
2727 4693
2728 EV_FREQUENT_CHECK; 4694 EV_FREQUENT_CHECK;
2729} 4695}
2730#endif 4696#endif
2731 4697
4698#if EV_PREPARE_ENABLE
2732void 4699void
2733ev_prepare_start (EV_P_ ev_prepare *w) 4700ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
2734{ 4701{
2735 if (expect_false (ev_is_active (w))) 4702 if (expect_false (ev_is_active (w)))
2736 return; 4703 return;
2737 4704
2738 EV_FREQUENT_CHECK; 4705 EV_FREQUENT_CHECK;
2739 4706
2740 ev_start (EV_A_ (W)w, ++preparecnt); 4707 ev_start (EV_A_ (W)w, ++preparecnt);
2741 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4708 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
2742 prepares [preparecnt - 1] = w; 4709 prepares [preparecnt - 1] = w;
2743 4710
2744 EV_FREQUENT_CHECK; 4711 EV_FREQUENT_CHECK;
2745} 4712}
2746 4713
2747void 4714void
2748ev_prepare_stop (EV_P_ ev_prepare *w) 4715ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
2749{ 4716{
2750 clear_pending (EV_A_ (W)w); 4717 clear_pending (EV_A_ (W)w);
2751 if (expect_false (!ev_is_active (w))) 4718 if (expect_false (!ev_is_active (w)))
2752 return; 4719 return;
2753 4720
… …
2762 4729
2763 ev_stop (EV_A_ (W)w); 4730 ev_stop (EV_A_ (W)w);
2764 4731
2765 EV_FREQUENT_CHECK; 4732 EV_FREQUENT_CHECK;
2766} 4733}
4734#endif
2767 4735
4736#if EV_CHECK_ENABLE
2768void 4737void
2769ev_check_start (EV_P_ ev_check *w) 4738ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
2770{ 4739{
2771 if (expect_false (ev_is_active (w))) 4740 if (expect_false (ev_is_active (w)))
2772 return; 4741 return;
2773 4742
2774 EV_FREQUENT_CHECK; 4743 EV_FREQUENT_CHECK;
2775 4744
2776 ev_start (EV_A_ (W)w, ++checkcnt); 4745 ev_start (EV_A_ (W)w, ++checkcnt);
2777 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4746 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
2778 checks [checkcnt - 1] = w; 4747 checks [checkcnt - 1] = w;
2779 4748
2780 EV_FREQUENT_CHECK; 4749 EV_FREQUENT_CHECK;
2781} 4750}
2782 4751
2783void 4752void
2784ev_check_stop (EV_P_ ev_check *w) 4753ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
2785{ 4754{
2786 clear_pending (EV_A_ (W)w); 4755 clear_pending (EV_A_ (W)w);
2787 if (expect_false (!ev_is_active (w))) 4756 if (expect_false (!ev_is_active (w)))
2788 return; 4757 return;
2789 4758
… …
2798 4767
2799 ev_stop (EV_A_ (W)w); 4768 ev_stop (EV_A_ (W)w);
2800 4769
2801 EV_FREQUENT_CHECK; 4770 EV_FREQUENT_CHECK;
2802} 4771}
4772#endif
2803 4773
2804#if EV_EMBED_ENABLE 4774#if EV_EMBED_ENABLE
2805void noinline 4775noinline
4776void
2806ev_embed_sweep (EV_P_ ev_embed *w) 4777ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
2807{ 4778{
2808 ev_loop (w->other, EVLOOP_NONBLOCK); 4779 ev_run (w->other, EVRUN_NOWAIT);
2809} 4780}
2810 4781
2811static void 4782static void
2812embed_io_cb (EV_P_ ev_io *io, int revents) 4783embed_io_cb (EV_P_ ev_io *io, int revents)
2813{ 4784{
2814 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4785 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2815 4786
2816 if (ev_cb (w)) 4787 if (ev_cb (w))
2817 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4788 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2818 else 4789 else
2819 ev_loop (w->other, EVLOOP_NONBLOCK); 4790 ev_run (w->other, EVRUN_NOWAIT);
2820} 4791}
2821 4792
2822static void 4793static void
2823embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4794embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2824{ 4795{
2825 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 4796 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2826 4797
2827 { 4798 {
2828 struct ev_loop *loop = w->other; 4799 EV_P = w->other;
2829 4800
2830 while (fdchangecnt) 4801 while (fdchangecnt)
2831 { 4802 {
2832 fd_reify (EV_A); 4803 fd_reify (EV_A);
2833 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4804 ev_run (EV_A_ EVRUN_NOWAIT);
2834 } 4805 }
2835 } 4806 }
2836} 4807}
2837 4808
2838static void 4809static void
2839embed_fork_cb (EV_P_ ev_fork *fork_w, int revents) 4810embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
2840{ 4811{
2841 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork)); 4812 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
2842 4813
4814 ev_embed_stop (EV_A_ w);
4815
2843 { 4816 {
2844 struct ev_loop *loop = w->other; 4817 EV_P = w->other;
2845 4818
2846 ev_loop_fork (EV_A); 4819 ev_loop_fork (EV_A);
4820 ev_run (EV_A_ EVRUN_NOWAIT);
2847 } 4821 }
4822
4823 ev_embed_start (EV_A_ w);
2848} 4824}
2849 4825
2850#if 0 4826#if 0
2851static void 4827static void
2852embed_idle_cb (EV_P_ ev_idle *idle, int revents) 4828embed_idle_cb (EV_P_ ev_idle *idle, int revents)
… …
2854 ev_idle_stop (EV_A_ idle); 4830 ev_idle_stop (EV_A_ idle);
2855} 4831}
2856#endif 4832#endif
2857 4833
2858void 4834void
2859ev_embed_start (EV_P_ ev_embed *w) 4835ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
2860{ 4836{
2861 if (expect_false (ev_is_active (w))) 4837 if (expect_false (ev_is_active (w)))
2862 return; 4838 return;
2863 4839
2864 { 4840 {
2865 struct ev_loop *loop = w->other; 4841 EV_P = w->other;
2866 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4842 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); 4843 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2868 } 4844 }
2869 4845
2870 EV_FREQUENT_CHECK; 4846 EV_FREQUENT_CHECK;
2871 4847
… …
2885 4861
2886 EV_FREQUENT_CHECK; 4862 EV_FREQUENT_CHECK;
2887} 4863}
2888 4864
2889void 4865void
2890ev_embed_stop (EV_P_ ev_embed *w) 4866ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
2891{ 4867{
2892 clear_pending (EV_A_ (W)w); 4868 clear_pending (EV_A_ (W)w);
2893 if (expect_false (!ev_is_active (w))) 4869 if (expect_false (!ev_is_active (w)))
2894 return; 4870 return;
2895 4871
… …
2897 4873
2898 ev_io_stop (EV_A_ &w->io); 4874 ev_io_stop (EV_A_ &w->io);
2899 ev_prepare_stop (EV_A_ &w->prepare); 4875 ev_prepare_stop (EV_A_ &w->prepare);
2900 ev_fork_stop (EV_A_ &w->fork); 4876 ev_fork_stop (EV_A_ &w->fork);
2901 4877
4878 ev_stop (EV_A_ (W)w);
4879
2902 EV_FREQUENT_CHECK; 4880 EV_FREQUENT_CHECK;
2903} 4881}
2904#endif 4882#endif
2905 4883
2906#if EV_FORK_ENABLE 4884#if EV_FORK_ENABLE
2907void 4885void
2908ev_fork_start (EV_P_ ev_fork *w) 4886ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
2909{ 4887{
2910 if (expect_false (ev_is_active (w))) 4888 if (expect_false (ev_is_active (w)))
2911 return; 4889 return;
2912 4890
2913 EV_FREQUENT_CHECK; 4891 EV_FREQUENT_CHECK;
2914 4892
2915 ev_start (EV_A_ (W)w, ++forkcnt); 4893 ev_start (EV_A_ (W)w, ++forkcnt);
2916 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4894 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
2917 forks [forkcnt - 1] = w; 4895 forks [forkcnt - 1] = w;
2918 4896
2919 EV_FREQUENT_CHECK; 4897 EV_FREQUENT_CHECK;
2920} 4898}
2921 4899
2922void 4900void
2923ev_fork_stop (EV_P_ ev_fork *w) 4901ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
2924{ 4902{
2925 clear_pending (EV_A_ (W)w); 4903 clear_pending (EV_A_ (W)w);
2926 if (expect_false (!ev_is_active (w))) 4904 if (expect_false (!ev_is_active (w)))
2927 return; 4905 return;
2928 4906
… …
2939 4917
2940 EV_FREQUENT_CHECK; 4918 EV_FREQUENT_CHECK;
2941} 4919}
2942#endif 4920#endif
2943 4921
2944#if EV_ASYNC_ENABLE 4922#if EV_CLEANUP_ENABLE
2945void 4923void
2946ev_async_start (EV_P_ ev_async *w) 4924ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
2947{ 4925{
2948 if (expect_false (ev_is_active (w))) 4926 if (expect_false (ev_is_active (w)))
2949 return; 4927 return;
2950 4928
2951 evpipe_init (EV_A);
2952
2953 EV_FREQUENT_CHECK; 4929 EV_FREQUENT_CHECK;
2954 4930
2955 ev_start (EV_A_ (W)w, ++asynccnt); 4931 ev_start (EV_A_ (W)w, ++cleanupcnt);
2956 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 4932 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
2957 asyncs [asynccnt - 1] = w; 4933 cleanups [cleanupcnt - 1] = w;
2958 4934
4935 /* cleanup watchers should never keep a refcount on the loop */
4936 ev_unref (EV_A);
2959 EV_FREQUENT_CHECK; 4937 EV_FREQUENT_CHECK;
2960} 4938}
2961 4939
2962void 4940void
2963ev_async_stop (EV_P_ ev_async *w) 4941ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
2964{ 4942{
2965 clear_pending (EV_A_ (W)w); 4943 clear_pending (EV_A_ (W)w);
2966 if (expect_false (!ev_is_active (w))) 4944 if (expect_false (!ev_is_active (w)))
2967 return; 4945 return;
2968 4946
2969 EV_FREQUENT_CHECK; 4947 EV_FREQUENT_CHECK;
4948 ev_ref (EV_A);
4949
4950 {
4951 int active = ev_active (w);
4952
4953 cleanups [active - 1] = cleanups [--cleanupcnt];
4954 ev_active (cleanups [active - 1]) = active;
4955 }
4956
4957 ev_stop (EV_A_ (W)w);
4958
4959 EV_FREQUENT_CHECK;
4960}
4961#endif
4962
4963#if EV_ASYNC_ENABLE
4964void
4965ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
4966{
4967 if (expect_false (ev_is_active (w)))
4968 return;
4969
4970 w->sent = 0;
4971
4972 evpipe_init (EV_A);
4973
4974 EV_FREQUENT_CHECK;
4975
4976 ev_start (EV_A_ (W)w, ++asynccnt);
4977 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
4978 asyncs [asynccnt - 1] = w;
4979
4980 EV_FREQUENT_CHECK;
4981}
4982
4983void
4984ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
4985{
4986 clear_pending (EV_A_ (W)w);
4987 if (expect_false (!ev_is_active (w)))
4988 return;
4989
4990 EV_FREQUENT_CHECK;
2970 4991
2971 { 4992 {
2972 int active = ev_active (w); 4993 int active = ev_active (w);
2973 4994
2974 asyncs [active - 1] = asyncs [--asynccnt]; 4995 asyncs [active - 1] = asyncs [--asynccnt];
… …
2979 5000
2980 EV_FREQUENT_CHECK; 5001 EV_FREQUENT_CHECK;
2981} 5002}
2982 5003
2983void 5004void
2984ev_async_send (EV_P_ ev_async *w) 5005ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
2985{ 5006{
2986 w->sent = 1; 5007 w->sent = 1;
2987 evpipe_write (EV_A_ &gotasync); 5008 evpipe_write (EV_A_ &async_pending);
2988} 5009}
2989#endif 5010#endif
2990 5011
2991/*****************************************************************************/ 5012/*****************************************************************************/
2992 5013
… …
3012} 5033}
3013 5034
3014static void 5035static void
3015once_cb_io (EV_P_ ev_io *w, int revents) 5036once_cb_io (EV_P_ ev_io *w, int revents)
3016{ 5037{
3017 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 5038 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
5039
5040 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
3018} 5041}
3019 5042
3020static void 5043static void
3021once_cb_to (EV_P_ ev_timer *w, int revents) 5044once_cb_to (EV_P_ ev_timer *w, int revents)
3022{ 5045{
3023 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 5046 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
3024}
3025 5047
5048 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
5049}
5050
3026void 5051void
3027ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5052ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
3028{ 5053{
3029 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5054 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3030
3031 if (expect_false (!once))
3032 {
3033 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
3034 return;
3035 }
3036 5055
3037 once->cb = cb; 5056 once->cb = cb;
3038 once->arg = arg; 5057 once->arg = arg;
3039 5058
3040 ev_init (&once->io, once_cb_io); 5059 ev_init (&once->io, once_cb_io);
… …
3050 ev_timer_set (&once->to, timeout, 0.); 5069 ev_timer_set (&once->to, timeout, 0.);
3051 ev_timer_start (EV_A_ &once->to); 5070 ev_timer_start (EV_A_ &once->to);
3052 } 5071 }
3053} 5072}
3054 5073
5074/*****************************************************************************/
5075
5076#if EV_WALK_ENABLE
5077ecb_cold
5078void
5079ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
5080{
5081 int i, j;
5082 ev_watcher_list *wl, *wn;
5083
5084 if (types & (EV_IO | EV_EMBED))
5085 for (i = 0; i < anfdmax; ++i)
5086 for (wl = anfds [i].head; wl; )
5087 {
5088 wn = wl->next;
5089
5090#if EV_EMBED_ENABLE
5091 if (ev_cb ((ev_io *)wl) == embed_io_cb)
5092 {
5093 if (types & EV_EMBED)
5094 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
5095 }
5096 else
5097#endif
5098#if EV_USE_INOTIFY
5099 if (ev_cb ((ev_io *)wl) == infy_cb)
5100 ;
5101 else
5102#endif
5103 if ((ev_io *)wl != &pipe_w)
5104 if (types & EV_IO)
5105 cb (EV_A_ EV_IO, wl);
5106
5107 wl = wn;
5108 }
5109
5110 if (types & (EV_TIMER | EV_STAT))
5111 for (i = timercnt + HEAP0; i-- > HEAP0; )
5112#if EV_STAT_ENABLE
5113 /*TODO: timer is not always active*/
5114 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
5115 {
5116 if (types & EV_STAT)
5117 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
5118 }
5119 else
5120#endif
5121 if (types & EV_TIMER)
5122 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
5123
5124#if EV_PERIODIC_ENABLE
5125 if (types & EV_PERIODIC)
5126 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
5127 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
5128#endif
5129
5130#if EV_IDLE_ENABLE
5131 if (types & EV_IDLE)
5132 for (j = NUMPRI; j--; )
5133 for (i = idlecnt [j]; i--; )
5134 cb (EV_A_ EV_IDLE, idles [j][i]);
5135#endif
5136
5137#if EV_FORK_ENABLE
5138 if (types & EV_FORK)
5139 for (i = forkcnt; i--; )
5140 if (ev_cb (forks [i]) != embed_fork_cb)
5141 cb (EV_A_ EV_FORK, forks [i]);
5142#endif
5143
5144#if EV_ASYNC_ENABLE
5145 if (types & EV_ASYNC)
5146 for (i = asynccnt; i--; )
5147 cb (EV_A_ EV_ASYNC, asyncs [i]);
5148#endif
5149
5150#if EV_PREPARE_ENABLE
5151 if (types & EV_PREPARE)
5152 for (i = preparecnt; i--; )
5153# if EV_EMBED_ENABLE
5154 if (ev_cb (prepares [i]) != embed_prepare_cb)
5155# endif
5156 cb (EV_A_ EV_PREPARE, prepares [i]);
5157#endif
5158
5159#if EV_CHECK_ENABLE
5160 if (types & EV_CHECK)
5161 for (i = checkcnt; i--; )
5162 cb (EV_A_ EV_CHECK, checks [i]);
5163#endif
5164
5165#if EV_SIGNAL_ENABLE
5166 if (types & EV_SIGNAL)
5167 for (i = 0; i < EV_NSIG - 1; ++i)
5168 for (wl = signals [i].head; wl; )
5169 {
5170 wn = wl->next;
5171 cb (EV_A_ EV_SIGNAL, wl);
5172 wl = wn;
5173 }
5174#endif
5175
5176#if EV_CHILD_ENABLE
5177 if (types & EV_CHILD)
5178 for (i = (EV_PID_HASHSIZE); i--; )
5179 for (wl = childs [i]; wl; )
5180 {
5181 wn = wl->next;
5182 cb (EV_A_ EV_CHILD, wl);
5183 wl = wn;
5184 }
5185#endif
5186/* EV_STAT 0x00001000 /* stat data changed */
5187/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
5188}
5189#endif
5190
3055#if EV_MULTIPLICITY 5191#if EV_MULTIPLICITY
3056 #include "ev_wrap.h" 5192 #include "ev_wrap.h"
3057#endif 5193#endif
3058 5194
3059#ifdef __cplusplus
3060}
3061#endif
3062

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