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Comparing libev/ev.c (file contents):
Revision 1.228 by root, Fri May 2 08:07:37 2008 UTC vs.
Revision 1.505 by root, Wed Jul 10 14:25:35 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
114# endif
115
116# ifndef EV_USE_INOTIFY
117# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
118# define EV_USE_INOTIFY 1
119# else 133# else
120# define EV_USE_INOTIFY 0 134# undef EV_USE_KQUEUE
121# endif
122# endif
123
124# ifndef EV_USE_EVENTFD
125# if HAVE_EVENTFD
126# define EV_USE_EVENTFD 1
127# else
128# define EV_USE_EVENTFD 0 135# define EV_USE_KQUEUE 0
129# endif
130# endif 136# endif
131 137
138# if HAVE_PORT_H && HAVE_PORT_CREATE
139# ifndef EV_USE_PORT
140# define EV_USE_PORT EV_FEATURE_BACKENDS
141# endif
142# else
143# undef EV_USE_PORT
144# define EV_USE_PORT 0
132#endif 145# endif
133 146
134#include <math.h> 147# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
148# ifndef EV_USE_INOTIFY
149# define EV_USE_INOTIFY EV_FEATURE_OS
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
172# endif
173
174#endif
175
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
223# include <io.h>
159# define WIN32_LEAN_AND_MEAN 224# define WIN32_LEAN_AND_MEAN
225# include <winsock2.h>
160# include <windows.h> 226# include <windows.h>
161# ifndef EV_SELECT_IS_WINSOCKET 227# ifndef EV_SELECT_IS_WINSOCKET
162# define EV_SELECT_IS_WINSOCKET 1 228# define EV_SELECT_IS_WINSOCKET 1
163# endif 229# endif
230# undef EV_AVOID_STDIO
164#endif 231#endif
165 232
166/* 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 */
167 234
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
168#ifndef EV_USE_MONOTONIC 281#ifndef EV_USE_MONOTONIC
282# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
283# define EV_USE_MONOTONIC EV_FEATURE_OS
284# else
169# define EV_USE_MONOTONIC 0 285# define EV_USE_MONOTONIC 0
286# endif
170#endif 287#endif
171 288
172#ifndef EV_USE_REALTIME 289#ifndef EV_USE_REALTIME
173# define EV_USE_REALTIME 0 290# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
174#endif 291#endif
175 292
176#ifndef EV_USE_NANOSLEEP 293#ifndef EV_USE_NANOSLEEP
294# if _POSIX_C_SOURCE >= 199309L
295# define EV_USE_NANOSLEEP EV_FEATURE_OS
296# else
177# define EV_USE_NANOSLEEP 0 297# define EV_USE_NANOSLEEP 0
298# endif
178#endif 299#endif
179 300
180#ifndef EV_USE_SELECT 301#ifndef EV_USE_SELECT
181# define EV_USE_SELECT 1 302# define EV_USE_SELECT EV_FEATURE_BACKENDS
182#endif 303#endif
183 304
184#ifndef EV_USE_POLL 305#ifndef EV_USE_POLL
185# ifdef _WIN32 306# ifdef _WIN32
186# define EV_USE_POLL 0 307# define EV_USE_POLL 0
187# else 308# else
188# define EV_USE_POLL 1 309# define EV_USE_POLL EV_FEATURE_BACKENDS
189# endif 310# endif
190#endif 311#endif
191 312
192#ifndef EV_USE_EPOLL 313#ifndef EV_USE_EPOLL
193# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 314# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
194# define EV_USE_EPOLL 1 315# define EV_USE_EPOLL EV_FEATURE_BACKENDS
195# else 316# else
196# define EV_USE_EPOLL 0 317# define EV_USE_EPOLL 0
197# endif 318# endif
198#endif 319#endif
199 320
… …
203 324
204#ifndef EV_USE_PORT 325#ifndef EV_USE_PORT
205# define EV_USE_PORT 0 326# define EV_USE_PORT 0
206#endif 327#endif
207 328
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
337#ifndef EV_USE_IOURING
338# if __linux
339# define EV_USE_IOURING 0
340# else
341# define EV_USE_IOURING 0
342# endif
343#endif
344
208#ifndef EV_USE_INOTIFY 345#ifndef EV_USE_INOTIFY
209# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 346# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
210# define EV_USE_INOTIFY 1 347# define EV_USE_INOTIFY EV_FEATURE_OS
211# else 348# else
212# define EV_USE_INOTIFY 0 349# define EV_USE_INOTIFY 0
213# endif 350# endif
214#endif 351#endif
215 352
216#ifndef EV_PID_HASHSIZE 353#ifndef EV_PID_HASHSIZE
217# if EV_MINIMAL 354# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
218# define EV_PID_HASHSIZE 1
219# else
220# define EV_PID_HASHSIZE 16
221# endif
222#endif 355#endif
223 356
224#ifndef EV_INOTIFY_HASHSIZE 357#ifndef EV_INOTIFY_HASHSIZE
225# if EV_MINIMAL 358# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
226# define EV_INOTIFY_HASHSIZE 1
227# else
228# define EV_INOTIFY_HASHSIZE 16
229# endif
230#endif 359#endif
231 360
232#ifndef EV_USE_EVENTFD 361#ifndef EV_USE_EVENTFD
233# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7)) 362# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
234# define EV_USE_EVENTFD 1 363# define EV_USE_EVENTFD EV_FEATURE_OS
235# else 364# else
236# define EV_USE_EVENTFD 0 365# define EV_USE_EVENTFD 0
237# endif 366# endif
238#endif 367#endif
239 368
369#ifndef EV_USE_SIGNALFD
370# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
371# define EV_USE_SIGNALFD EV_FEATURE_OS
372# else
373# define EV_USE_SIGNALFD 0
374# endif
375#endif
376
377#if 0 /* debugging */
378# define EV_VERIFY 3
379# define EV_USE_4HEAP 1
380# define EV_HEAP_CACHE_AT 1
381#endif
382
383#ifndef EV_VERIFY
384# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
385#endif
386
387#ifndef EV_USE_4HEAP
388# define EV_USE_4HEAP EV_FEATURE_DATA
389#endif
390
391#ifndef EV_HEAP_CACHE_AT
392# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
393#endif
394
395#ifdef __ANDROID__
396/* supposedly, android doesn't typedef fd_mask */
397# undef EV_USE_SELECT
398# define EV_USE_SELECT 0
399/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
400# undef EV_USE_CLOCK_SYSCALL
401# define EV_USE_CLOCK_SYSCALL 0
402#endif
403
404/* aix's poll.h seems to cause lots of trouble */
405#ifdef _AIX
406/* AIX has a completely broken poll.h header */
407# undef EV_USE_POLL
408# define EV_USE_POLL 0
409#endif
410
411/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
412/* which makes programs even slower. might work on other unices, too. */
413#if EV_USE_CLOCK_SYSCALL
414# include <sys/syscall.h>
415# ifdef SYS_clock_gettime
416# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
417# undef EV_USE_MONOTONIC
418# define EV_USE_MONOTONIC 1
419# define EV_NEED_SYSCALL 1
420# else
421# undef EV_USE_CLOCK_SYSCALL
422# define EV_USE_CLOCK_SYSCALL 0
423# endif
424#endif
425
240/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 426/* this block fixes any misconfiguration where we know we run into trouble otherwise */
241 427
242#ifndef CLOCK_MONOTONIC 428#ifndef CLOCK_MONOTONIC
243# undef EV_USE_MONOTONIC 429# undef EV_USE_MONOTONIC
244# define EV_USE_MONOTONIC 0 430# define EV_USE_MONOTONIC 0
… …
253# undef EV_USE_INOTIFY 439# undef EV_USE_INOTIFY
254# define EV_USE_INOTIFY 0 440# define EV_USE_INOTIFY 0
255#endif 441#endif
256 442
257#if !EV_USE_NANOSLEEP 443#if !EV_USE_NANOSLEEP
258# ifndef _WIN32 444/* hp-ux has it in sys/time.h, which we unconditionally include above */
445# if !defined _WIN32 && !defined __hpux
259# include <sys/select.h> 446# include <sys/select.h>
260# endif 447# endif
261#endif 448#endif
262 449
450#if EV_USE_LINUXAIO
451# include <sys/syscall.h>
452# if SYS_io_getevents && EV_USE_EPOLL /* linuxaio backend requires epoll backend */
453# define EV_NEED_SYSCALL 1
454# else
455# undef EV_USE_LINUXAIO
456# define EV_USE_LINUXAIO 0
457# endif
458#endif
459
460#if EV_USE_IOURING
461# include <sys/syscall.h>
462# if !SYS_io_uring_setup && __linux && !__alpha
463# define SYS_io_uring_setup 425
464# define SYS_io_uring_enter 426
465# define SYS_io_uring_wregister 427
466# endif
467# if SYS_io_uring_setup && EV_USE_EPOLL /* iouring backend requires epoll backend */
468# define EV_NEED_SYSCALL 1
469# else
470# undef EV_USE_IOURING
471# define EV_USE_IOURING 0
472# endif
473#endif
474
263#if EV_USE_INOTIFY 475#if EV_USE_INOTIFY
476# include <sys/statfs.h>
264# include <sys/inotify.h> 477# include <sys/inotify.h>
478/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
479# ifndef IN_DONT_FOLLOW
480# undef EV_USE_INOTIFY
481# define EV_USE_INOTIFY 0
265#endif 482# endif
266
267#if EV_SELECT_IS_WINSOCKET
268# include <winsock.h>
269#endif 483#endif
270 484
271#if EV_USE_EVENTFD 485#if EV_USE_EVENTFD
272/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 486/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
273# include <stdint.h> 487# include <stdint.h>
274# ifdef __cplusplus 488# ifndef EFD_NONBLOCK
275extern "C" { 489# define EFD_NONBLOCK O_NONBLOCK
276# endif 490# endif
277int eventfd (unsigned int initval, int flags); 491# ifndef EFD_CLOEXEC
278# ifdef __cplusplus 492# ifdef O_CLOEXEC
279} 493# define EFD_CLOEXEC O_CLOEXEC
494# else
495# define EFD_CLOEXEC 02000000
496# endif
280# endif 497# endif
498EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
499#endif
500
501#if EV_USE_SIGNALFD
502/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
503# include <stdint.h>
504# ifndef SFD_NONBLOCK
505# define SFD_NONBLOCK O_NONBLOCK
281#endif 506# endif
507# ifndef SFD_CLOEXEC
508# ifdef O_CLOEXEC
509# define SFD_CLOEXEC O_CLOEXEC
510# else
511# define SFD_CLOEXEC 02000000
512# endif
513# endif
514EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
282 515
283/**/ 516struct signalfd_siginfo
517{
518 uint32_t ssi_signo;
519 char pad[128 - sizeof (uint32_t)];
520};
521#endif
522
523/*****************************************************************************/
524
525#if EV_VERIFY >= 3
526# define EV_FREQUENT_CHECK ev_verify (EV_A)
527#else
528# define EV_FREQUENT_CHECK do { } while (0)
529#endif
284 530
285/* 531/*
286 * This is used to avoid floating point rounding problems. 532 * This is used to work around floating point rounding problems.
287 * It is added to ev_rt_now when scheduling periodics
288 * to ensure progress, time-wise, even when rounding
289 * errors are against us.
290 * This value is good at least till the year 4000. 533 * This value is good at least till the year 4000.
291 * Better solutions welcome.
292 */ 534 */
293#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 535#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
536/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
294 537
295#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 538#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
296#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 539#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
297/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
298 540
541/* find a portable timestamp that is "always" in the future but fits into time_t.
542 * this is quite hard, and we are mostly guessing - we handle 32 bit signed/unsigned time_t,
543 * and sizes larger than 32 bit, and maybe the unlikely floating point time_t */
544#define EV_TSTAMP_HUGE \
545 (sizeof (time_t) >= 8 ? 10000000000000. \
546 : 0 < (time_t)4294967295 ? 4294967295. \
547 : 2147483647.) \
548
549#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
550#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
551#define EV_TV_GET(tv) ((tv).tv_sec + (tv).tv_usec * 1e6)
552#define EV_TS_GET(ts) ((ts).tv_sec + (ts).tv_nsec * 1e9)
553
554/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
555/* ECB.H BEGIN */
556/*
557 * libecb - http://software.schmorp.de/pkg/libecb
558 *
559 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
560 * Copyright (©) 2011 Emanuele Giaquinta
561 * All rights reserved.
562 *
563 * Redistribution and use in source and binary forms, with or without modifica-
564 * tion, are permitted provided that the following conditions are met:
565 *
566 * 1. Redistributions of source code must retain the above copyright notice,
567 * this list of conditions and the following disclaimer.
568 *
569 * 2. Redistributions in binary form must reproduce the above copyright
570 * notice, this list of conditions and the following disclaimer in the
571 * documentation and/or other materials provided with the distribution.
572 *
573 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
574 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
575 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
576 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
577 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
578 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
579 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
580 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
581 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
582 * OF THE POSSIBILITY OF SUCH DAMAGE.
583 *
584 * Alternatively, the contents of this file may be used under the terms of
585 * the GNU General Public License ("GPL") version 2 or any later version,
586 * in which case the provisions of the GPL are applicable instead of
587 * the above. If you wish to allow the use of your version of this file
588 * only under the terms of the GPL and not to allow others to use your
589 * version of this file under the BSD license, indicate your decision
590 * by deleting the provisions above and replace them with the notice
591 * and other provisions required by the GPL. If you do not delete the
592 * provisions above, a recipient may use your version of this file under
593 * either the BSD or the GPL.
594 */
595
596#ifndef ECB_H
597#define ECB_H
598
599/* 16 bits major, 16 bits minor */
600#define ECB_VERSION 0x00010006
601
602#ifdef _WIN32
603 typedef signed char int8_t;
604 typedef unsigned char uint8_t;
605 typedef signed short int16_t;
606 typedef unsigned short uint16_t;
607 typedef signed int int32_t;
608 typedef unsigned int uint32_t;
299#if __GNUC__ >= 4 609 #if __GNUC__
300# define expect(expr,value) __builtin_expect ((expr),(value)) 610 typedef signed long long int64_t;
301# define noinline __attribute__ ((noinline)) 611 typedef unsigned long long uint64_t;
612 #else /* _MSC_VER || __BORLANDC__ */
613 typedef signed __int64 int64_t;
614 typedef unsigned __int64 uint64_t;
615 #endif
616 #ifdef _WIN64
617 #define ECB_PTRSIZE 8
618 typedef uint64_t uintptr_t;
619 typedef int64_t intptr_t;
620 #else
621 #define ECB_PTRSIZE 4
622 typedef uint32_t uintptr_t;
623 typedef int32_t intptr_t;
624 #endif
302#else 625#else
303# define expect(expr,value) (expr) 626 #include <inttypes.h>
304# define noinline 627 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
305# if __STDC_VERSION__ < 199901L && __GNUC__ < 2 628 #define ECB_PTRSIZE 8
306# define inline 629 #else
630 #define ECB_PTRSIZE 4
631 #endif
307# endif 632#endif
633
634#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
635#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
636
637/* work around x32 idiocy by defining proper macros */
638#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
639 #if _ILP32
640 #define ECB_AMD64_X32 1
641 #else
642 #define ECB_AMD64 1
308#endif 643 #endif
644#endif
309 645
310#define expect_false(expr) expect ((expr) != 0, 0) 646/* many compilers define _GNUC_ to some versions but then only implement
311#define expect_true(expr) expect ((expr) != 0, 1) 647 * what their idiot authors think are the "more important" extensions,
312#define inline_size static inline 648 * causing enormous grief in return for some better fake benchmark numbers.
313 649 * or so.
314#if EV_MINIMAL 650 * we try to detect these and simply assume they are not gcc - if they have
315# define inline_speed static noinline 651 * an issue with that they should have done it right in the first place.
652 */
653#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
654 #define ECB_GCC_VERSION(major,minor) 0
316#else 655#else
656 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
657#endif
658
659#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
660
661#if __clang__ && defined __has_builtin
662 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
663#else
664 #define ECB_CLANG_BUILTIN(x) 0
665#endif
666
667#if __clang__ && defined __has_extension
668 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
669#else
670 #define ECB_CLANG_EXTENSION(x) 0
671#endif
672
673#define ECB_CPP (__cplusplus+0)
674#define ECB_CPP11 (__cplusplus >= 201103L)
675#define ECB_CPP14 (__cplusplus >= 201402L)
676#define ECB_CPP17 (__cplusplus >= 201703L)
677
678#if ECB_CPP
679 #define ECB_C 0
680 #define ECB_STDC_VERSION 0
681#else
682 #define ECB_C 1
683 #define ECB_STDC_VERSION __STDC_VERSION__
684#endif
685
686#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
687#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
688#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
689
690#if ECB_CPP
691 #define ECB_EXTERN_C extern "C"
692 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
693 #define ECB_EXTERN_C_END }
694#else
695 #define ECB_EXTERN_C extern
696 #define ECB_EXTERN_C_BEG
697 #define ECB_EXTERN_C_END
698#endif
699
700/*****************************************************************************/
701
702/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
703/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
704
705#if ECB_NO_THREADS
706 #define ECB_NO_SMP 1
707#endif
708
709#if ECB_NO_SMP
710 #define ECB_MEMORY_FENCE do { } while (0)
711#endif
712
713/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
714#if __xlC__ && ECB_CPP
715 #include <builtins.h>
716#endif
717
718#if 1400 <= _MSC_VER
719 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
720#endif
721
722#ifndef ECB_MEMORY_FENCE
723 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
724 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
725 #if __i386 || __i386__
726 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
727 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
728 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
729 #elif ECB_GCC_AMD64
730 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
731 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
732 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
733 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
734 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
735 #elif defined __ARM_ARCH_2__ \
736 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
737 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
738 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
739 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
740 || defined __ARM_ARCH_5TEJ__
741 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
742 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
743 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
744 || defined __ARM_ARCH_6T2__
745 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
746 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
747 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
748 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
749 #elif __aarch64__
750 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
751 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
752 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
753 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
754 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
755 #elif defined __s390__ || defined __s390x__
756 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
757 #elif defined __mips__
758 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
759 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
760 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
761 #elif defined __alpha__
762 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
763 #elif defined __hppa__
764 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
765 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
766 #elif defined __ia64__
767 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
768 #elif defined __m68k__
769 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
770 #elif defined __m88k__
771 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
772 #elif defined __sh__
773 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
774 #endif
775 #endif
776#endif
777
778#ifndef ECB_MEMORY_FENCE
779 #if ECB_GCC_VERSION(4,7)
780 /* see comment below (stdatomic.h) about the C11 memory model. */
781 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
782 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
783 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
784 #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
785
786 #elif ECB_CLANG_EXTENSION(c_atomic)
787 /* see comment below (stdatomic.h) about the C11 memory model. */
788 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
789 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
790 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
791 #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
792
793 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
794 #define ECB_MEMORY_FENCE __sync_synchronize ()
795 #elif _MSC_VER >= 1500 /* VC++ 2008 */
796 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
797 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
798 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
799 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
800 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
801 #elif _MSC_VER >= 1400 /* VC++ 2005 */
802 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
803 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
804 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
805 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
806 #elif defined _WIN32
807 #include <WinNT.h>
808 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
809 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
810 #include <mbarrier.h>
811 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
812 #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
813 #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
814 #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
815 #elif __xlC__
816 #define ECB_MEMORY_FENCE __sync ()
817 #endif
818#endif
819
820#ifndef ECB_MEMORY_FENCE
821 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
822 /* we assume that these memory fences work on all variables/all memory accesses, */
823 /* not just C11 atomics and atomic accesses */
824 #include <stdatomic.h>
825 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
826 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
827 #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
828 #endif
829#endif
830
831#ifndef ECB_MEMORY_FENCE
832 #if !ECB_AVOID_PTHREADS
833 /*
834 * if you get undefined symbol references to pthread_mutex_lock,
835 * or failure to find pthread.h, then you should implement
836 * the ECB_MEMORY_FENCE operations for your cpu/compiler
837 * OR provide pthread.h and link against the posix thread library
838 * of your system.
839 */
840 #include <pthread.h>
841 #define ECB_NEEDS_PTHREADS 1
842 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
843
844 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
845 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
846 #endif
847#endif
848
849#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
850 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
851#endif
852
853#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
854 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
855#endif
856
857#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
858 #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
859#endif
860
861/*****************************************************************************/
862
863#if ECB_CPP
864 #define ecb_inline static inline
865#elif ECB_GCC_VERSION(2,5)
866 #define ecb_inline static __inline__
867#elif ECB_C99
868 #define ecb_inline static inline
869#else
870 #define ecb_inline static
871#endif
872
873#if ECB_GCC_VERSION(3,3)
874 #define ecb_restrict __restrict__
875#elif ECB_C99
876 #define ecb_restrict restrict
877#else
878 #define ecb_restrict
879#endif
880
881typedef int ecb_bool;
882
883#define ECB_CONCAT_(a, b) a ## b
884#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
885#define ECB_STRINGIFY_(a) # a
886#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
887#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
888
889#define ecb_function_ ecb_inline
890
891#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
892 #define ecb_attribute(attrlist) __attribute__ (attrlist)
893#else
894 #define ecb_attribute(attrlist)
895#endif
896
897#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
898 #define ecb_is_constant(expr) __builtin_constant_p (expr)
899#else
900 /* possible C11 impl for integral types
901 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
902 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
903
904 #define ecb_is_constant(expr) 0
905#endif
906
907#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
908 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
909#else
910 #define ecb_expect(expr,value) (expr)
911#endif
912
913#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
914 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
915#else
916 #define ecb_prefetch(addr,rw,locality)
917#endif
918
919/* no emulation for ecb_decltype */
920#if ECB_CPP11
921 // older implementations might have problems with decltype(x)::type, work around it
922 template<class T> struct ecb_decltype_t { typedef T type; };
923 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
924#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
925 #define ecb_decltype(x) __typeof__ (x)
926#endif
927
928#if _MSC_VER >= 1300
929 #define ecb_deprecated __declspec (deprecated)
930#else
931 #define ecb_deprecated ecb_attribute ((__deprecated__))
932#endif
933
934#if _MSC_VER >= 1500
935 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
936#elif ECB_GCC_VERSION(4,5)
937 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
938#else
939 #define ecb_deprecated_message(msg) ecb_deprecated
940#endif
941
942#if _MSC_VER >= 1400
943 #define ecb_noinline __declspec (noinline)
944#else
945 #define ecb_noinline ecb_attribute ((__noinline__))
946#endif
947
948#define ecb_unused ecb_attribute ((__unused__))
949#define ecb_const ecb_attribute ((__const__))
950#define ecb_pure ecb_attribute ((__pure__))
951
952#if ECB_C11 || __IBMC_NORETURN
953 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
954 #define ecb_noreturn _Noreturn
955#elif ECB_CPP11
956 #define ecb_noreturn [[noreturn]]
957#elif _MSC_VER >= 1200
958 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
959 #define ecb_noreturn __declspec (noreturn)
960#else
961 #define ecb_noreturn ecb_attribute ((__noreturn__))
962#endif
963
964#if ECB_GCC_VERSION(4,3)
965 #define ecb_artificial ecb_attribute ((__artificial__))
966 #define ecb_hot ecb_attribute ((__hot__))
967 #define ecb_cold ecb_attribute ((__cold__))
968#else
969 #define ecb_artificial
970 #define ecb_hot
971 #define ecb_cold
972#endif
973
974/* put around conditional expressions if you are very sure that the */
975/* expression is mostly true or mostly false. note that these return */
976/* booleans, not the expression. */
977#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
978#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
979/* for compatibility to the rest of the world */
980#define ecb_likely(expr) ecb_expect_true (expr)
981#define ecb_unlikely(expr) ecb_expect_false (expr)
982
983/* count trailing zero bits and count # of one bits */
984#if ECB_GCC_VERSION(3,4) \
985 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
986 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
987 && ECB_CLANG_BUILTIN(__builtin_popcount))
988 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
989 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
990 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
991 #define ecb_ctz32(x) __builtin_ctz (x)
992 #define ecb_ctz64(x) __builtin_ctzll (x)
993 #define ecb_popcount32(x) __builtin_popcount (x)
994 /* no popcountll */
995#else
996 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
997 ecb_function_ ecb_const int
998 ecb_ctz32 (uint32_t x)
999 {
1000#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1001 unsigned long r;
1002 _BitScanForward (&r, x);
1003 return (int)r;
1004#else
1005 int r = 0;
1006
1007 x &= ~x + 1; /* this isolates the lowest bit */
1008
1009#if ECB_branchless_on_i386
1010 r += !!(x & 0xaaaaaaaa) << 0;
1011 r += !!(x & 0xcccccccc) << 1;
1012 r += !!(x & 0xf0f0f0f0) << 2;
1013 r += !!(x & 0xff00ff00) << 3;
1014 r += !!(x & 0xffff0000) << 4;
1015#else
1016 if (x & 0xaaaaaaaa) r += 1;
1017 if (x & 0xcccccccc) r += 2;
1018 if (x & 0xf0f0f0f0) r += 4;
1019 if (x & 0xff00ff00) r += 8;
1020 if (x & 0xffff0000) r += 16;
1021#endif
1022
1023 return r;
1024#endif
1025 }
1026
1027 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
1028 ecb_function_ ecb_const int
1029 ecb_ctz64 (uint64_t x)
1030 {
1031#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1032 unsigned long r;
1033 _BitScanForward64 (&r, x);
1034 return (int)r;
1035#else
1036 int shift = x & 0xffffffff ? 0 : 32;
1037 return ecb_ctz32 (x >> shift) + shift;
1038#endif
1039 }
1040
1041 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
1042 ecb_function_ ecb_const int
1043 ecb_popcount32 (uint32_t x)
1044 {
1045 x -= (x >> 1) & 0x55555555;
1046 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
1047 x = ((x >> 4) + x) & 0x0f0f0f0f;
1048 x *= 0x01010101;
1049
1050 return x >> 24;
1051 }
1052
1053 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
1054 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
1055 {
1056#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1057 unsigned long r;
1058 _BitScanReverse (&r, x);
1059 return (int)r;
1060#else
1061 int r = 0;
1062
1063 if (x >> 16) { x >>= 16; r += 16; }
1064 if (x >> 8) { x >>= 8; r += 8; }
1065 if (x >> 4) { x >>= 4; r += 4; }
1066 if (x >> 2) { x >>= 2; r += 2; }
1067 if (x >> 1) { r += 1; }
1068
1069 return r;
1070#endif
1071 }
1072
1073 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1074 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1075 {
1076#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1077 unsigned long r;
1078 _BitScanReverse64 (&r, x);
1079 return (int)r;
1080#else
1081 int r = 0;
1082
1083 if (x >> 32) { x >>= 32; r += 32; }
1084
1085 return r + ecb_ld32 (x);
1086#endif
1087 }
1088#endif
1089
1090ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1091ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1092ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1093ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1094
1095ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1096ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1097{
1098 return ( (x * 0x0802U & 0x22110U)
1099 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1100}
1101
1102ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1103ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1104{
1105 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1106 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1107 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1108 x = ( x >> 8 ) | ( x << 8);
1109
1110 return x;
1111}
1112
1113ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1114ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1115{
1116 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1117 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1118 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1119 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1120 x = ( x >> 16 ) | ( x << 16);
1121
1122 return x;
1123}
1124
1125/* popcount64 is only available on 64 bit cpus as gcc builtin */
1126/* so for this version we are lazy */
1127ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1128ecb_function_ ecb_const int
1129ecb_popcount64 (uint64_t x)
1130{
1131 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1132}
1133
1134ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1135ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1136ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1137ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1138ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1139ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1140ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1141ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1142
1143ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1144ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1145ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1146ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1147ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1148ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1149ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1150ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1151
1152#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1153 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1154 #define ecb_bswap16(x) __builtin_bswap16 (x)
1155 #else
1156 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1157 #endif
1158 #define ecb_bswap32(x) __builtin_bswap32 (x)
1159 #define ecb_bswap64(x) __builtin_bswap64 (x)
1160#elif _MSC_VER
1161 #include <stdlib.h>
1162 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1163 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1164 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1165#else
1166 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1167 ecb_function_ ecb_const uint16_t
1168 ecb_bswap16 (uint16_t x)
1169 {
1170 return ecb_rotl16 (x, 8);
1171 }
1172
1173 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1174 ecb_function_ ecb_const uint32_t
1175 ecb_bswap32 (uint32_t x)
1176 {
1177 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1178 }
1179
1180 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1181 ecb_function_ ecb_const uint64_t
1182 ecb_bswap64 (uint64_t x)
1183 {
1184 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1185 }
1186#endif
1187
1188#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1189 #define ecb_unreachable() __builtin_unreachable ()
1190#else
1191 /* this seems to work fine, but gcc always emits a warning for it :/ */
1192 ecb_inline ecb_noreturn void ecb_unreachable (void);
1193 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1194#endif
1195
1196/* try to tell the compiler that some condition is definitely true */
1197#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1198
1199ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1200ecb_inline ecb_const uint32_t
1201ecb_byteorder_helper (void)
1202{
1203 /* the union code still generates code under pressure in gcc, */
1204 /* but less than using pointers, and always seems to */
1205 /* successfully return a constant. */
1206 /* the reason why we have this horrible preprocessor mess */
1207 /* is to avoid it in all cases, at least on common architectures */
1208 /* or when using a recent enough gcc version (>= 4.6) */
1209#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1210 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1211 #define ECB_LITTLE_ENDIAN 1
1212 return 0x44332211;
1213#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1214 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1215 #define ECB_BIG_ENDIAN 1
1216 return 0x11223344;
1217#else
1218 union
1219 {
1220 uint8_t c[4];
1221 uint32_t u;
1222 } u = { 0x11, 0x22, 0x33, 0x44 };
1223 return u.u;
1224#endif
1225}
1226
1227ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1228ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1229ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1230ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1231
1232#if ECB_GCC_VERSION(3,0) || ECB_C99
1233 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1234#else
1235 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1236#endif
1237
1238#if ECB_CPP
1239 template<typename T>
1240 static inline T ecb_div_rd (T val, T div)
1241 {
1242 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1243 }
1244 template<typename T>
1245 static inline T ecb_div_ru (T val, T div)
1246 {
1247 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1248 }
1249#else
1250 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1251 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1252#endif
1253
1254#if ecb_cplusplus_does_not_suck
1255 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1256 template<typename T, int N>
1257 static inline int ecb_array_length (const T (&arr)[N])
1258 {
1259 return N;
1260 }
1261#else
1262 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1263#endif
1264
1265ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1266ecb_function_ ecb_const uint32_t
1267ecb_binary16_to_binary32 (uint32_t x)
1268{
1269 unsigned int s = (x & 0x8000) << (31 - 15);
1270 int e = (x >> 10) & 0x001f;
1271 unsigned int m = x & 0x03ff;
1272
1273 if (ecb_expect_false (e == 31))
1274 /* infinity or NaN */
1275 e = 255 - (127 - 15);
1276 else if (ecb_expect_false (!e))
1277 {
1278 if (ecb_expect_true (!m))
1279 /* zero, handled by code below by forcing e to 0 */
1280 e = 0 - (127 - 15);
1281 else
1282 {
1283 /* subnormal, renormalise */
1284 unsigned int s = 10 - ecb_ld32 (m);
1285
1286 m = (m << s) & 0x3ff; /* mask implicit bit */
1287 e -= s - 1;
1288 }
1289 }
1290
1291 /* e and m now are normalised, or zero, (or inf or nan) */
1292 e += 127 - 15;
1293
1294 return s | (e << 23) | (m << (23 - 10));
1295}
1296
1297ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1298ecb_function_ ecb_const uint16_t
1299ecb_binary32_to_binary16 (uint32_t x)
1300{
1301 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1302 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1303 unsigned int m = x & 0x007fffff;
1304
1305 x &= 0x7fffffff;
1306
1307 /* if it's within range of binary16 normals, use fast path */
1308 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1309 {
1310 /* mantissa round-to-even */
1311 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1312
1313 /* handle overflow */
1314 if (ecb_expect_false (m >= 0x00800000))
1315 {
1316 m >>= 1;
1317 e += 1;
1318 }
1319
1320 return s | (e << 10) | (m >> (23 - 10));
1321 }
1322
1323 /* handle large numbers and infinity */
1324 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1325 return s | 0x7c00;
1326
1327 /* handle zero, subnormals and small numbers */
1328 if (ecb_expect_true (x < 0x38800000))
1329 {
1330 /* zero */
1331 if (ecb_expect_true (!x))
1332 return s;
1333
1334 /* handle subnormals */
1335
1336 /* too small, will be zero */
1337 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1338 return s;
1339
1340 m |= 0x00800000; /* make implicit bit explicit */
1341
1342 /* very tricky - we need to round to the nearest e (+10) bit value */
1343 {
1344 unsigned int bits = 14 - e;
1345 unsigned int half = (1 << (bits - 1)) - 1;
1346 unsigned int even = (m >> bits) & 1;
1347
1348 /* if this overflows, we will end up with a normalised number */
1349 m = (m + half + even) >> bits;
1350 }
1351
1352 return s | m;
1353 }
1354
1355 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1356 m >>= 13;
1357
1358 return s | 0x7c00 | m | !m;
1359}
1360
1361/*******************************************************************************/
1362/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1363
1364/* basically, everything uses "ieee pure-endian" floating point numbers */
1365/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1366#if 0 \
1367 || __i386 || __i386__ \
1368 || ECB_GCC_AMD64 \
1369 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1370 || defined __s390__ || defined __s390x__ \
1371 || defined __mips__ \
1372 || defined __alpha__ \
1373 || defined __hppa__ \
1374 || defined __ia64__ \
1375 || defined __m68k__ \
1376 || defined __m88k__ \
1377 || defined __sh__ \
1378 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1379 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1380 || defined __aarch64__
1381 #define ECB_STDFP 1
1382 #include <string.h> /* for memcpy */
1383#else
1384 #define ECB_STDFP 0
1385#endif
1386
1387#ifndef ECB_NO_LIBM
1388
1389 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1390
1391 /* only the oldest of old doesn't have this one. solaris. */
1392 #ifdef INFINITY
1393 #define ECB_INFINITY INFINITY
1394 #else
1395 #define ECB_INFINITY HUGE_VAL
1396 #endif
1397
1398 #ifdef NAN
1399 #define ECB_NAN NAN
1400 #else
1401 #define ECB_NAN ECB_INFINITY
1402 #endif
1403
1404 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1405 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1406 #define ecb_frexpf(x,e) frexpf ((x), (e))
1407 #else
1408 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1409 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1410 #endif
1411
1412 /* convert a float to ieee single/binary32 */
1413 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1414 ecb_function_ ecb_const uint32_t
1415 ecb_float_to_binary32 (float x)
1416 {
1417 uint32_t r;
1418
1419 #if ECB_STDFP
1420 memcpy (&r, &x, 4);
1421 #else
1422 /* slow emulation, works for anything but -0 */
1423 uint32_t m;
1424 int e;
1425
1426 if (x == 0e0f ) return 0x00000000U;
1427 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1428 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1429 if (x != x ) return 0x7fbfffffU;
1430
1431 m = ecb_frexpf (x, &e) * 0x1000000U;
1432
1433 r = m & 0x80000000U;
1434
1435 if (r)
1436 m = -m;
1437
1438 if (e <= -126)
1439 {
1440 m &= 0xffffffU;
1441 m >>= (-125 - e);
1442 e = -126;
1443 }
1444
1445 r |= (e + 126) << 23;
1446 r |= m & 0x7fffffU;
1447 #endif
1448
1449 return r;
1450 }
1451
1452 /* converts an ieee single/binary32 to a float */
1453 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1454 ecb_function_ ecb_const float
1455 ecb_binary32_to_float (uint32_t x)
1456 {
1457 float r;
1458
1459 #if ECB_STDFP
1460 memcpy (&r, &x, 4);
1461 #else
1462 /* emulation, only works for normals and subnormals and +0 */
1463 int neg = x >> 31;
1464 int e = (x >> 23) & 0xffU;
1465
1466 x &= 0x7fffffU;
1467
1468 if (e)
1469 x |= 0x800000U;
1470 else
1471 e = 1;
1472
1473 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1474 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1475
1476 r = neg ? -r : r;
1477 #endif
1478
1479 return r;
1480 }
1481
1482 /* convert a double to ieee double/binary64 */
1483 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1484 ecb_function_ ecb_const uint64_t
1485 ecb_double_to_binary64 (double x)
1486 {
1487 uint64_t r;
1488
1489 #if ECB_STDFP
1490 memcpy (&r, &x, 8);
1491 #else
1492 /* slow emulation, works for anything but -0 */
1493 uint64_t m;
1494 int e;
1495
1496 if (x == 0e0 ) return 0x0000000000000000U;
1497 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1498 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1499 if (x != x ) return 0X7ff7ffffffffffffU;
1500
1501 m = frexp (x, &e) * 0x20000000000000U;
1502
1503 r = m & 0x8000000000000000;;
1504
1505 if (r)
1506 m = -m;
1507
1508 if (e <= -1022)
1509 {
1510 m &= 0x1fffffffffffffU;
1511 m >>= (-1021 - e);
1512 e = -1022;
1513 }
1514
1515 r |= ((uint64_t)(e + 1022)) << 52;
1516 r |= m & 0xfffffffffffffU;
1517 #endif
1518
1519 return r;
1520 }
1521
1522 /* converts an ieee double/binary64 to a double */
1523 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1524 ecb_function_ ecb_const double
1525 ecb_binary64_to_double (uint64_t x)
1526 {
1527 double r;
1528
1529 #if ECB_STDFP
1530 memcpy (&r, &x, 8);
1531 #else
1532 /* emulation, only works for normals and subnormals and +0 */
1533 int neg = x >> 63;
1534 int e = (x >> 52) & 0x7ffU;
1535
1536 x &= 0xfffffffffffffU;
1537
1538 if (e)
1539 x |= 0x10000000000000U;
1540 else
1541 e = 1;
1542
1543 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1544 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1545
1546 r = neg ? -r : r;
1547 #endif
1548
1549 return r;
1550 }
1551
1552 /* convert a float to ieee half/binary16 */
1553 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1554 ecb_function_ ecb_const uint16_t
1555 ecb_float_to_binary16 (float x)
1556 {
1557 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1558 }
1559
1560 /* convert an ieee half/binary16 to float */
1561 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1562 ecb_function_ ecb_const float
1563 ecb_binary16_to_float (uint16_t x)
1564 {
1565 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1566 }
1567
1568#endif
1569
1570#endif
1571
1572/* ECB.H END */
1573
1574#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1575/* if your architecture doesn't need memory fences, e.g. because it is
1576 * single-cpu/core, or if you use libev in a project that doesn't use libev
1577 * from multiple threads, then you can define ECB_NO_THREADS when compiling
1578 * libev, in which cases the memory fences become nops.
1579 * alternatively, you can remove this #error and link against libpthread,
1580 * which will then provide the memory fences.
1581 */
1582# error "memory fences not defined for your architecture, please report"
1583#endif
1584
1585#ifndef ECB_MEMORY_FENCE
1586# define ECB_MEMORY_FENCE do { } while (0)
1587# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1588# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1589#endif
1590
1591#define inline_size ecb_inline
1592
1593#if EV_FEATURE_CODE
317# define inline_speed static inline 1594# define inline_speed ecb_inline
1595#else
1596# define inline_speed ecb_noinline static
318#endif 1597#endif
319 1598
1599/*****************************************************************************/
1600/* raw syscall wrappers */
1601
1602#if EV_NEED_SYSCALL
1603
1604#include <sys/syscall.h>
1605
1606/*
1607 * define some syscall wrappers for common architectures
1608 * this is mostly for nice looks during debugging, not performance.
1609 * our syscalls return < 0, not == -1, on error. which is good
1610 * enough for linux aio.
1611 * TODO: arm is also common nowadays, maybe even mips and x86
1612 * TODO: after implementing this, it suddenly looks like overkill, but its hard to remove...
1613 */
1614#if __GNUC__ && __linux && ECB_AMD64 && !defined __OPTIMIZE_SIZE__
1615 /* the costly errno access probably kills this for size optimisation */
1616
1617 #define ev_syscall(nr,narg,arg1,arg2,arg3,arg4,arg5,arg6) \
1618 ({ \
1619 long res; \
1620 register unsigned long r6 __asm__ ("r9" ); \
1621 register unsigned long r5 __asm__ ("r8" ); \
1622 register unsigned long r4 __asm__ ("r10"); \
1623 register unsigned long r3 __asm__ ("rdx"); \
1624 register unsigned long r2 __asm__ ("rsi"); \
1625 register unsigned long r1 __asm__ ("rdi"); \
1626 if (narg >= 6) r6 = (unsigned long)(arg6); \
1627 if (narg >= 5) r5 = (unsigned long)(arg5); \
1628 if (narg >= 4) r4 = (unsigned long)(arg4); \
1629 if (narg >= 3) r3 = (unsigned long)(arg3); \
1630 if (narg >= 2) r2 = (unsigned long)(arg2); \
1631 if (narg >= 1) r1 = (unsigned long)(arg1); \
1632 __asm__ __volatile__ ( \
1633 "syscall\n\t" \
1634 : "=a" (res) \
1635 : "0" (nr), "r" (r1), "r" (r2), "r" (r3), "r" (r4), "r" (r5) \
1636 : "cc", "r11", "cx", "memory"); \
1637 errno = -res; \
1638 res; \
1639 })
1640
1641#endif
1642
1643#ifdef ev_syscall
1644 #define ev_syscall0(nr) ev_syscall (nr, 0, 0, 0, 0, 0, 0, 0)
1645 #define ev_syscall1(nr,arg1) ev_syscall (nr, 1, arg1, 0, 0, 0, 0, 0)
1646 #define ev_syscall2(nr,arg1,arg2) ev_syscall (nr, 2, arg1, arg2, 0, 0, 0, 0)
1647 #define ev_syscall3(nr,arg1,arg2,arg3) ev_syscall (nr, 3, arg1, arg2, arg3, 0, 0, 0)
1648 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) ev_syscall (nr, 3, arg1, arg2, arg3, arg4, 0, 0)
1649 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) ev_syscall (nr, 5, arg1, arg2, arg3, arg4, arg5, 0)
1650 #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) ev_syscall (nr, 6, arg1, arg2, arg3, arg4, arg5,arg6)
1651#else
1652 #define ev_syscall0(nr) syscall (nr)
1653 #define ev_syscall1(nr,arg1) syscall (nr, arg1)
1654 #define ev_syscall2(nr,arg1,arg2) syscall (nr, arg1, arg2)
1655 #define ev_syscall3(nr,arg1,arg2,arg3) syscall (nr, arg1, arg2, arg3)
1656 #define ev_syscall4(nr,arg1,arg2,arg3,arg4) syscall (nr, arg1, arg2, arg3, arg4)
1657 #define ev_syscall5(nr,arg1,arg2,arg3,arg4,arg5) syscall (nr, arg1, arg2, arg3, arg4, arg5)
1658 #define ev_syscall6(nr,arg1,arg2,arg3,arg4,arg5,arg6) syscall (nr, arg1, arg2, arg3, arg4, arg5,arg6)
1659#endif
1660
1661#endif
1662
1663/*****************************************************************************/
1664
320#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1665#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1666
1667#if EV_MINPRI == EV_MAXPRI
1668# define ABSPRI(w) (((W)w), 0)
1669#else
321#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1670# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1671#endif
322 1672
323#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1673#define EMPTY /* required for microsofts broken pseudo-c compiler */
324#define EMPTY2(a,b) /* used to suppress some warnings */
325 1674
326typedef ev_watcher *W; 1675typedef ev_watcher *W;
327typedef ev_watcher_list *WL; 1676typedef ev_watcher_list *WL;
328typedef ev_watcher_time *WT; 1677typedef ev_watcher_time *WT;
329 1678
1679#define ev_active(w) ((W)(w))->active
330#define ev_at(w) ((WT)(w))->at 1680#define ev_at(w) ((WT)(w))->at
331 1681
1682#if EV_USE_REALTIME
1683/* sig_atomic_t is used to avoid per-thread variables or locking but still */
1684/* giving it a reasonably high chance of working on typical architectures */
1685static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1686#endif
1687
332#if EV_USE_MONOTONIC 1688#if EV_USE_MONOTONIC
333/* sig_atomic_t is used to avoid per-thread variables or locking but still */
334/* giving it a reasonably high chance of working on typical architetcures */
335static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1689static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1690#endif
1691
1692#ifndef EV_FD_TO_WIN32_HANDLE
1693# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1694#endif
1695#ifndef EV_WIN32_HANDLE_TO_FD
1696# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1697#endif
1698#ifndef EV_WIN32_CLOSE_FD
1699# define EV_WIN32_CLOSE_FD(fd) close (fd)
336#endif 1700#endif
337 1701
338#ifdef _WIN32 1702#ifdef _WIN32
339# include "ev_win32.c" 1703# include "ev_win32.c"
340#endif 1704#endif
341 1705
342/*****************************************************************************/ 1706/*****************************************************************************/
343 1707
1708#if EV_USE_LINUXAIO
1709# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
1710#endif
1711
1712/* define a suitable floor function (only used by periodics atm) */
1713
1714#if EV_USE_FLOOR
1715# include <math.h>
1716# define ev_floor(v) floor (v)
1717#else
1718
1719#include <float.h>
1720
1721/* a floor() replacement function, should be independent of ev_tstamp type */
1722ecb_noinline
1723static ev_tstamp
1724ev_floor (ev_tstamp v)
1725{
1726 /* the choice of shift factor is not terribly important */
1727#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1728 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1729#else
1730 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1731#endif
1732
1733 /* special treatment for negative arguments */
1734 if (ecb_expect_false (v < 0.))
1735 {
1736 ev_tstamp f = -ev_floor (-v);
1737
1738 return f - (f == v ? 0 : 1);
1739 }
1740
1741 /* argument too large for an unsigned long? then reduce it */
1742 if (ecb_expect_false (v >= shift))
1743 {
1744 ev_tstamp f;
1745
1746 if (v == v - 1.)
1747 return v; /* very large numbers are assumed to be integer */
1748
1749 f = shift * ev_floor (v * (1. / shift));
1750 return f + ev_floor (v - f);
1751 }
1752
1753 /* fits into an unsigned long */
1754 return (unsigned long)v;
1755}
1756
1757#endif
1758
1759/*****************************************************************************/
1760
1761#ifdef __linux
1762# include <sys/utsname.h>
1763#endif
1764
1765ecb_noinline ecb_cold
1766static unsigned int
1767ev_linux_version (void)
1768{
1769#ifdef __linux
1770 unsigned int v = 0;
1771 struct utsname buf;
1772 int i;
1773 char *p = buf.release;
1774
1775 if (uname (&buf))
1776 return 0;
1777
1778 for (i = 3+1; --i; )
1779 {
1780 unsigned int c = 0;
1781
1782 for (;;)
1783 {
1784 if (*p >= '0' && *p <= '9')
1785 c = c * 10 + *p++ - '0';
1786 else
1787 {
1788 p += *p == '.';
1789 break;
1790 }
1791 }
1792
1793 v = (v << 8) | c;
1794 }
1795
1796 return v;
1797#else
1798 return 0;
1799#endif
1800}
1801
1802/*****************************************************************************/
1803
1804#if EV_AVOID_STDIO
1805ecb_noinline ecb_cold
1806static void
1807ev_printerr (const char *msg)
1808{
1809 write (STDERR_FILENO, msg, strlen (msg));
1810}
1811#endif
1812
344static void (*syserr_cb)(const char *msg); 1813static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
345 1814
1815ecb_cold
346void 1816void
347ev_set_syserr_cb (void (*cb)(const char *msg)) 1817ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
348{ 1818{
349 syserr_cb = cb; 1819 syserr_cb = cb;
350} 1820}
351 1821
352static void noinline 1822ecb_noinline ecb_cold
1823static void
353syserr (const char *msg) 1824ev_syserr (const char *msg)
354{ 1825{
355 if (!msg) 1826 if (!msg)
356 msg = "(libev) system error"; 1827 msg = "(libev) system error";
357 1828
358 if (syserr_cb) 1829 if (syserr_cb)
359 syserr_cb (msg); 1830 syserr_cb (msg);
360 else 1831 else
361 { 1832 {
1833#if EV_AVOID_STDIO
1834 ev_printerr (msg);
1835 ev_printerr (": ");
1836 ev_printerr (strerror (errno));
1837 ev_printerr ("\n");
1838#else
362 perror (msg); 1839 perror (msg);
1840#endif
363 abort (); 1841 abort ();
364 } 1842 }
365} 1843}
366 1844
367static void * 1845static void *
368ev_realloc_emul (void *ptr, long size) 1846ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
369{ 1847{
370 /* some systems, notably openbsd and darwin, fail to properly 1848 /* some systems, notably openbsd and darwin, fail to properly
371 * implement realloc (x, 0) (as required by both ansi c-98 and 1849 * implement realloc (x, 0) (as required by both ansi c-89 and
372 * the single unix specification, so work around them here. 1850 * the single unix specification, so work around them here.
1851 * recently, also (at least) fedora and debian started breaking it,
1852 * despite documenting it otherwise.
373 */ 1853 */
374 1854
375 if (size) 1855 if (size)
376 return realloc (ptr, size); 1856 return realloc (ptr, size);
377 1857
378 free (ptr); 1858 free (ptr);
379 return 0; 1859 return 0;
380} 1860}
381 1861
382static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1862static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
383 1863
1864ecb_cold
384void 1865void
385ev_set_allocator (void *(*cb)(void *ptr, long size)) 1866ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
386{ 1867{
387 alloc = cb; 1868 alloc = cb;
388} 1869}
389 1870
390inline_speed void * 1871inline_speed void *
… …
392{ 1873{
393 ptr = alloc (ptr, size); 1874 ptr = alloc (ptr, size);
394 1875
395 if (!ptr && size) 1876 if (!ptr && size)
396 { 1877 {
1878#if EV_AVOID_STDIO
1879 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1880#else
397 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1881 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1882#endif
398 abort (); 1883 abort ();
399 } 1884 }
400 1885
401 return ptr; 1886 return ptr;
402} 1887}
… …
404#define ev_malloc(size) ev_realloc (0, (size)) 1889#define ev_malloc(size) ev_realloc (0, (size))
405#define ev_free(ptr) ev_realloc ((ptr), 0) 1890#define ev_free(ptr) ev_realloc ((ptr), 0)
406 1891
407/*****************************************************************************/ 1892/*****************************************************************************/
408 1893
1894/* set in reify when reification needed */
1895#define EV_ANFD_REIFY 1
1896
1897/* file descriptor info structure */
409typedef struct 1898typedef struct
410{ 1899{
411 WL head; 1900 WL head;
412 unsigned char events; 1901 unsigned char events; /* the events watched for */
413 unsigned char reify; 1902 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1903 unsigned char emask; /* some backends store the actual kernel mask in here */
1904 unsigned char eflags; /* flags field for use by backends */
1905#if EV_USE_EPOLL
1906 unsigned int egen; /* generation counter to counter epoll bugs */
1907#endif
414#if EV_SELECT_IS_WINSOCKET 1908#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
415 SOCKET handle; 1909 SOCKET handle;
416#endif 1910#endif
1911#if EV_USE_IOCP
1912 OVERLAPPED or, ow;
1913#endif
417} ANFD; 1914} ANFD;
418 1915
1916/* stores the pending event set for a given watcher */
419typedef struct 1917typedef struct
420{ 1918{
421 W w; 1919 W w;
422 int events; 1920 int events; /* the pending event set for the given watcher */
423} ANPENDING; 1921} ANPENDING;
424 1922
425#if EV_USE_INOTIFY 1923#if EV_USE_INOTIFY
1924/* hash table entry per inotify-id */
426typedef struct 1925typedef struct
427{ 1926{
428 WL head; 1927 WL head;
429} ANFS; 1928} ANFS;
1929#endif
1930
1931/* Heap Entry */
1932#if EV_HEAP_CACHE_AT
1933 /* a heap element */
1934 typedef struct {
1935 ev_tstamp at;
1936 WT w;
1937 } ANHE;
1938
1939 #define ANHE_w(he) (he).w /* access watcher, read-write */
1940 #define ANHE_at(he) (he).at /* access cached at, read-only */
1941 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1942#else
1943 /* a heap element */
1944 typedef WT ANHE;
1945
1946 #define ANHE_w(he) (he)
1947 #define ANHE_at(he) (he)->at
1948 #define ANHE_at_cache(he)
430#endif 1949#endif
431 1950
432#if EV_MULTIPLICITY 1951#if EV_MULTIPLICITY
433 1952
434 struct ev_loop 1953 struct ev_loop
… …
440 #undef VAR 1959 #undef VAR
441 }; 1960 };
442 #include "ev_wrap.h" 1961 #include "ev_wrap.h"
443 1962
444 static struct ev_loop default_loop_struct; 1963 static struct ev_loop default_loop_struct;
445 struct ev_loop *ev_default_loop_ptr; 1964 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
446 1965
447#else 1966#else
448 1967
449 ev_tstamp ev_rt_now; 1968 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
450 #define VAR(name,decl) static decl; 1969 #define VAR(name,decl) static decl;
451 #include "ev_vars.h" 1970 #include "ev_vars.h"
452 #undef VAR 1971 #undef VAR
453 1972
454 static int ev_default_loop_ptr; 1973 static int ev_default_loop_ptr;
455 1974
456#endif 1975#endif
457 1976
1977#if EV_FEATURE_API
1978# define EV_RELEASE_CB if (ecb_expect_false (release_cb)) release_cb (EV_A)
1979# define EV_ACQUIRE_CB if (ecb_expect_false (acquire_cb)) acquire_cb (EV_A)
1980# define EV_INVOKE_PENDING invoke_cb (EV_A)
1981#else
1982# define EV_RELEASE_CB (void)0
1983# define EV_ACQUIRE_CB (void)0
1984# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1985#endif
1986
1987#define EVBREAK_RECURSE 0x80
1988
458/*****************************************************************************/ 1989/*****************************************************************************/
459 1990
1991#ifndef EV_HAVE_EV_TIME
460ev_tstamp 1992ev_tstamp
461ev_time (void) 1993ev_time (void) EV_NOEXCEPT
462{ 1994{
463#if EV_USE_REALTIME 1995#if EV_USE_REALTIME
1996 if (ecb_expect_true (have_realtime))
1997 {
464 struct timespec ts; 1998 struct timespec ts;
465 clock_gettime (CLOCK_REALTIME, &ts); 1999 clock_gettime (CLOCK_REALTIME, &ts);
466 return ts.tv_sec + ts.tv_nsec * 1e-9; 2000 return EV_TS_GET (ts);
467#else 2001 }
2002#endif
2003
468 struct timeval tv; 2004 struct timeval tv;
469 gettimeofday (&tv, 0); 2005 gettimeofday (&tv, 0);
470 return tv.tv_sec + tv.tv_usec * 1e-6; 2006 return EV_TV_GET (tv);
471#endif
472} 2007}
2008#endif
473 2009
474ev_tstamp inline_size 2010inline_size ev_tstamp
475get_clock (void) 2011get_clock (void)
476{ 2012{
477#if EV_USE_MONOTONIC 2013#if EV_USE_MONOTONIC
478 if (expect_true (have_monotonic)) 2014 if (ecb_expect_true (have_monotonic))
479 { 2015 {
480 struct timespec ts; 2016 struct timespec ts;
481 clock_gettime (CLOCK_MONOTONIC, &ts); 2017 clock_gettime (CLOCK_MONOTONIC, &ts);
482 return ts.tv_sec + ts.tv_nsec * 1e-9; 2018 return EV_TS_GET (ts);
483 } 2019 }
484#endif 2020#endif
485 2021
486 return ev_time (); 2022 return ev_time ();
487} 2023}
488 2024
489#if EV_MULTIPLICITY 2025#if EV_MULTIPLICITY
490ev_tstamp 2026ev_tstamp
491ev_now (EV_P) 2027ev_now (EV_P) EV_NOEXCEPT
492{ 2028{
493 return ev_rt_now; 2029 return ev_rt_now;
494} 2030}
495#endif 2031#endif
496 2032
497void 2033void
498ev_sleep (ev_tstamp delay) 2034ev_sleep (ev_tstamp delay) EV_NOEXCEPT
499{ 2035{
500 if (delay > 0.) 2036 if (delay > 0.)
501 { 2037 {
502#if EV_USE_NANOSLEEP 2038#if EV_USE_NANOSLEEP
503 struct timespec ts; 2039 struct timespec ts;
504 2040
505 ts.tv_sec = (time_t)delay; 2041 EV_TS_SET (ts, delay);
506 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
507
508 nanosleep (&ts, 0); 2042 nanosleep (&ts, 0);
509#elif defined(_WIN32) 2043#elif defined _WIN32
2044 /* maybe this should round up, as ms is very low resolution */
2045 /* compared to select (µs) or nanosleep (ns) */
510 Sleep ((unsigned long)(delay * 1e3)); 2046 Sleep ((unsigned long)(delay * 1e3));
511#else 2047#else
512 struct timeval tv; 2048 struct timeval tv;
513 2049
514 tv.tv_sec = (time_t)delay; 2050 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
515 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 2051 /* something not guaranteed by newer posix versions, but guaranteed */
516 2052 /* by older ones */
2053 EV_TV_SET (tv, delay);
517 select (0, 0, 0, 0, &tv); 2054 select (0, 0, 0, 0, &tv);
518#endif 2055#endif
519 } 2056 }
520} 2057}
521 2058
522/*****************************************************************************/ 2059/*****************************************************************************/
523 2060
524int inline_size 2061#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
2062
2063/* find a suitable new size for the given array, */
2064/* hopefully by rounding to a nice-to-malloc size */
2065inline_size int
525array_nextsize (int elem, int cur, int cnt) 2066array_nextsize (int elem, int cur, int cnt)
526{ 2067{
527 int ncur = cur + 1; 2068 int ncur = cur + 1;
528 2069
529 do 2070 do
530 ncur <<= 1; 2071 ncur <<= 1;
531 while (cnt > ncur); 2072 while (cnt > ncur);
532 2073
533 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 2074 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
534 if (elem * ncur > 4096) 2075 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
535 { 2076 {
536 ncur *= elem; 2077 ncur *= elem;
537 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 2078 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
538 ncur = ncur - sizeof (void *) * 4; 2079 ncur = ncur - sizeof (void *) * 4;
539 ncur /= elem; 2080 ncur /= elem;
540 } 2081 }
541 2082
542 return ncur; 2083 return ncur;
543} 2084}
544 2085
545static noinline void * 2086ecb_noinline ecb_cold
2087static void *
546array_realloc (int elem, void *base, int *cur, int cnt) 2088array_realloc (int elem, void *base, int *cur, int cnt)
547{ 2089{
548 *cur = array_nextsize (elem, *cur, cnt); 2090 *cur = array_nextsize (elem, *cur, cnt);
549 return ev_realloc (base, elem * *cur); 2091 return ev_realloc (base, elem * *cur);
550} 2092}
551 2093
2094#define array_needsize_noinit(base,offset,count)
2095
2096#define array_needsize_zerofill(base,offset,count) \
2097 memset ((void *)(base + offset), 0, sizeof (*(base)) * (count))
2098
552#define array_needsize(type,base,cur,cnt,init) \ 2099#define array_needsize(type,base,cur,cnt,init) \
553 if (expect_false ((cnt) > (cur))) \ 2100 if (ecb_expect_false ((cnt) > (cur))) \
554 { \ 2101 { \
555 int ocur_ = (cur); \ 2102 ecb_unused int ocur_ = (cur); \
556 (base) = (type *)array_realloc \ 2103 (base) = (type *)array_realloc \
557 (sizeof (type), (base), &(cur), (cnt)); \ 2104 (sizeof (type), (base), &(cur), (cnt)); \
558 init ((base) + (ocur_), (cur) - ocur_); \ 2105 init ((base), ocur_, ((cur) - ocur_)); \
559 } 2106 }
560 2107
561#if 0 2108#if 0
562#define array_slim(type,stem) \ 2109#define array_slim(type,stem) \
563 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 2110 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
… …
567 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 2114 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
568 } 2115 }
569#endif 2116#endif
570 2117
571#define array_free(stem, idx) \ 2118#define array_free(stem, idx) \
572 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 2119 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
573 2120
574/*****************************************************************************/ 2121/*****************************************************************************/
575 2122
576void noinline 2123/* dummy callback for pending events */
2124ecb_noinline
2125static void
2126pendingcb (EV_P_ ev_prepare *w, int revents)
2127{
2128}
2129
2130ecb_noinline
2131void
577ev_feed_event (EV_P_ void *w, int revents) 2132ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
578{ 2133{
579 W w_ = (W)w; 2134 W w_ = (W)w;
580 int pri = ABSPRI (w_); 2135 int pri = ABSPRI (w_);
581 2136
582 if (expect_false (w_->pending)) 2137 if (ecb_expect_false (w_->pending))
583 pendings [pri][w_->pending - 1].events |= revents; 2138 pendings [pri][w_->pending - 1].events |= revents;
584 else 2139 else
585 { 2140 {
586 w_->pending = ++pendingcnt [pri]; 2141 w_->pending = ++pendingcnt [pri];
587 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2142 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
588 pendings [pri][w_->pending - 1].w = w_; 2143 pendings [pri][w_->pending - 1].w = w_;
589 pendings [pri][w_->pending - 1].events = revents; 2144 pendings [pri][w_->pending - 1].events = revents;
590 } 2145 }
591}
592 2146
593void inline_speed 2147 pendingpri = NUMPRI - 1;
2148}
2149
2150inline_speed void
2151feed_reverse (EV_P_ W w)
2152{
2153 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
2154 rfeeds [rfeedcnt++] = w;
2155}
2156
2157inline_size void
2158feed_reverse_done (EV_P_ int revents)
2159{
2160 do
2161 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
2162 while (rfeedcnt);
2163}
2164
2165inline_speed void
594queue_events (EV_P_ W *events, int eventcnt, int type) 2166queue_events (EV_P_ W *events, int eventcnt, int type)
595{ 2167{
596 int i; 2168 int i;
597 2169
598 for (i = 0; i < eventcnt; ++i) 2170 for (i = 0; i < eventcnt; ++i)
599 ev_feed_event (EV_A_ events [i], type); 2171 ev_feed_event (EV_A_ events [i], type);
600} 2172}
601 2173
602/*****************************************************************************/ 2174/*****************************************************************************/
603 2175
604void inline_size 2176inline_speed void
605anfds_init (ANFD *base, int count)
606{
607 while (count--)
608 {
609 base->head = 0;
610 base->events = EV_NONE;
611 base->reify = 0;
612
613 ++base;
614 }
615}
616
617void inline_speed
618fd_event (EV_P_ int fd, int revents) 2177fd_event_nocheck (EV_P_ int fd, int revents)
619{ 2178{
620 ANFD *anfd = anfds + fd; 2179 ANFD *anfd = anfds + fd;
621 ev_io *w; 2180 ev_io *w;
622 2181
623 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2182 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
627 if (ev) 2186 if (ev)
628 ev_feed_event (EV_A_ (W)w, ev); 2187 ev_feed_event (EV_A_ (W)w, ev);
629 } 2188 }
630} 2189}
631 2190
632void 2191/* do not submit kernel events for fds that have reify set */
2192/* because that means they changed while we were polling for new events */
2193inline_speed void
633ev_feed_fd_event (EV_P_ int fd, int revents) 2194fd_event (EV_P_ int fd, int revents)
2195{
2196 ANFD *anfd = anfds + fd;
2197
2198 if (ecb_expect_true (!anfd->reify))
2199 fd_event_nocheck (EV_A_ fd, revents);
2200}
2201
2202void
2203ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
634{ 2204{
635 if (fd >= 0 && fd < anfdmax) 2205 if (fd >= 0 && fd < anfdmax)
636 fd_event (EV_A_ fd, revents); 2206 fd_event_nocheck (EV_A_ fd, revents);
637} 2207}
638 2208
639void inline_size 2209/* make sure the external fd watch events are in-sync */
2210/* with the kernel/libev internal state */
2211inline_size void
640fd_reify (EV_P) 2212fd_reify (EV_P)
641{ 2213{
642 int i; 2214 int i;
2215
2216#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2217 for (i = 0; i < fdchangecnt; ++i)
2218 {
2219 int fd = fdchanges [i];
2220 ANFD *anfd = anfds + fd;
2221
2222 if (anfd->reify & EV__IOFDSET && anfd->head)
2223 {
2224 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2225
2226 if (handle != anfd->handle)
2227 {
2228 unsigned long arg;
2229
2230 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2231
2232 /* handle changed, but fd didn't - we need to do it in two steps */
2233 backend_modify (EV_A_ fd, anfd->events, 0);
2234 anfd->events = 0;
2235 anfd->handle = handle;
2236 }
2237 }
2238 }
2239#endif
643 2240
644 for (i = 0; i < fdchangecnt; ++i) 2241 for (i = 0; i < fdchangecnt; ++i)
645 { 2242 {
646 int fd = fdchanges [i]; 2243 int fd = fdchanges [i];
647 ANFD *anfd = anfds + fd; 2244 ANFD *anfd = anfds + fd;
648 ev_io *w; 2245 ev_io *w;
649 2246
650 unsigned char events = 0; 2247 unsigned char o_events = anfd->events;
2248 unsigned char o_reify = anfd->reify;
651 2249
652 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2250 anfd->reify = 0;
653 events |= (unsigned char)w->events;
654 2251
655#if EV_SELECT_IS_WINSOCKET 2252 /*if (ecb_expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
656 if (events)
657 { 2253 {
658 unsigned long argp; 2254 anfd->events = 0;
659 #ifdef EV_FD_TO_WIN32_HANDLE 2255
660 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 2256 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
661 #else 2257 anfd->events |= (unsigned char)w->events;
662 anfd->handle = _get_osfhandle (fd); 2258
663 #endif 2259 if (o_events != anfd->events)
664 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 2260 o_reify = EV__IOFDSET; /* actually |= */
665 } 2261 }
666#endif
667 2262
668 { 2263 if (o_reify & EV__IOFDSET)
669 unsigned char o_events = anfd->events;
670 unsigned char o_reify = anfd->reify;
671
672 anfd->reify = 0;
673 anfd->events = events;
674
675 if (o_events != events || o_reify & EV_IOFDSET)
676 backend_modify (EV_A_ fd, o_events, events); 2264 backend_modify (EV_A_ fd, o_events, anfd->events);
677 }
678 } 2265 }
679 2266
680 fdchangecnt = 0; 2267 fdchangecnt = 0;
681} 2268}
682 2269
2270/* something about the given fd changed */
683void inline_size 2271inline_size
2272void
684fd_change (EV_P_ int fd, int flags) 2273fd_change (EV_P_ int fd, int flags)
685{ 2274{
686 unsigned char reify = anfds [fd].reify; 2275 unsigned char reify = anfds [fd].reify;
687 anfds [fd].reify |= flags; 2276 anfds [fd].reify |= flags;
688 2277
689 if (expect_true (!reify)) 2278 if (ecb_expect_true (!reify))
690 { 2279 {
691 ++fdchangecnt; 2280 ++fdchangecnt;
692 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2281 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
693 fdchanges [fdchangecnt - 1] = fd; 2282 fdchanges [fdchangecnt - 1] = fd;
694 } 2283 }
695} 2284}
696 2285
697void inline_speed 2286/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
2287inline_speed ecb_cold void
698fd_kill (EV_P_ int fd) 2288fd_kill (EV_P_ int fd)
699{ 2289{
700 ev_io *w; 2290 ev_io *w;
701 2291
702 while ((w = (ev_io *)anfds [fd].head)) 2292 while ((w = (ev_io *)anfds [fd].head))
… …
704 ev_io_stop (EV_A_ w); 2294 ev_io_stop (EV_A_ w);
705 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2295 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
706 } 2296 }
707} 2297}
708 2298
709int inline_size 2299/* check whether the given fd is actually valid, for error recovery */
2300inline_size ecb_cold int
710fd_valid (int fd) 2301fd_valid (int fd)
711{ 2302{
712#ifdef _WIN32 2303#ifdef _WIN32
713 return _get_osfhandle (fd) != -1; 2304 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
714#else 2305#else
715 return fcntl (fd, F_GETFD) != -1; 2306 return fcntl (fd, F_GETFD) != -1;
716#endif 2307#endif
717} 2308}
718 2309
719/* called on EBADF to verify fds */ 2310/* called on EBADF to verify fds */
720static void noinline 2311ecb_noinline ecb_cold
2312static void
721fd_ebadf (EV_P) 2313fd_ebadf (EV_P)
722{ 2314{
723 int fd; 2315 int fd;
724 2316
725 for (fd = 0; fd < anfdmax; ++fd) 2317 for (fd = 0; fd < anfdmax; ++fd)
726 if (anfds [fd].events) 2318 if (anfds [fd].events)
727 if (!fd_valid (fd) == -1 && errno == EBADF) 2319 if (!fd_valid (fd) && errno == EBADF)
728 fd_kill (EV_A_ fd); 2320 fd_kill (EV_A_ fd);
729} 2321}
730 2322
731/* called on ENOMEM in select/poll to kill some fds and retry */ 2323/* called on ENOMEM in select/poll to kill some fds and retry */
732static void noinline 2324ecb_noinline ecb_cold
2325static void
733fd_enomem (EV_P) 2326fd_enomem (EV_P)
734{ 2327{
735 int fd; 2328 int fd;
736 2329
737 for (fd = anfdmax; fd--; ) 2330 for (fd = anfdmax; fd--; )
738 if (anfds [fd].events) 2331 if (anfds [fd].events)
739 { 2332 {
740 fd_kill (EV_A_ fd); 2333 fd_kill (EV_A_ fd);
741 return; 2334 break;
742 } 2335 }
743} 2336}
744 2337
745/* usually called after fork if backend needs to re-arm all fds from scratch */ 2338/* usually called after fork if backend needs to re-arm all fds from scratch */
746static void noinline 2339ecb_noinline
2340static void
747fd_rearm_all (EV_P) 2341fd_rearm_all (EV_P)
748{ 2342{
749 int fd; 2343 int fd;
750 2344
751 for (fd = 0; fd < anfdmax; ++fd) 2345 for (fd = 0; fd < anfdmax; ++fd)
752 if (anfds [fd].events) 2346 if (anfds [fd].events)
753 { 2347 {
754 anfds [fd].events = 0; 2348 anfds [fd].events = 0;
2349 anfds [fd].emask = 0;
755 fd_change (EV_A_ fd, EV_IOFDSET | 1); 2350 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
756 } 2351 }
757} 2352}
758 2353
759/*****************************************************************************/ 2354/* used to prepare libev internal fd's */
760 2355/* this is not fork-safe */
761/* towards the root */ 2356inline_speed void
762void inline_speed
763upheap (WT *heap, int k)
764{
765 WT w = heap [k];
766
767 for (;;)
768 {
769 int p = k >> 1;
770
771 /* maybe we could use a dummy element at heap [0]? */
772 if (!p || heap [p]->at <= w->at)
773 break;
774
775 heap [k] = heap [p];
776 ((W)heap [k])->active = k;
777 k = p;
778 }
779
780 heap [k] = w;
781 ((W)heap [k])->active = k;
782}
783
784/* away from the root */
785void inline_speed
786downheap (WT *heap, int N, int k)
787{
788 WT w = heap [k];
789
790 for (;;)
791 {
792 int c = k << 1;
793
794 if (c > N)
795 break;
796
797 c += c < N && heap [c]->at > heap [c + 1]->at
798 ? 1 : 0;
799
800 if (w->at <= heap [c]->at)
801 break;
802
803 heap [k] = heap [c];
804 ((W)heap [k])->active = k;
805
806 k = c;
807 }
808
809 heap [k] = w;
810 ((W)heap [k])->active = k;
811}
812
813void inline_size
814adjustheap (WT *heap, int N, int k)
815{
816 upheap (heap, k);
817 downheap (heap, N, k);
818}
819
820/*****************************************************************************/
821
822typedef struct
823{
824 WL head;
825 EV_ATOMIC_T gotsig;
826} ANSIG;
827
828static ANSIG *signals;
829static int signalmax;
830
831static EV_ATOMIC_T gotsig;
832
833void inline_size
834signals_init (ANSIG *base, int count)
835{
836 while (count--)
837 {
838 base->head = 0;
839 base->gotsig = 0;
840
841 ++base;
842 }
843}
844
845/*****************************************************************************/
846
847void inline_speed
848fd_intern (int fd) 2357fd_intern (int fd)
849{ 2358{
850#ifdef _WIN32 2359#ifdef _WIN32
851 int arg = 1; 2360 unsigned long arg = 1;
852 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 2361 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
853#else 2362#else
854 fcntl (fd, F_SETFD, FD_CLOEXEC); 2363 fcntl (fd, F_SETFD, FD_CLOEXEC);
855 fcntl (fd, F_SETFL, O_NONBLOCK); 2364 fcntl (fd, F_SETFL, O_NONBLOCK);
856#endif 2365#endif
857} 2366}
858 2367
859static void noinline 2368/*****************************************************************************/
860evpipe_init (EV_P) 2369
2370/*
2371 * the heap functions want a real array index. array index 0 is guaranteed to not
2372 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
2373 * the branching factor of the d-tree.
2374 */
2375
2376/*
2377 * at the moment we allow libev the luxury of two heaps,
2378 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
2379 * which is more cache-efficient.
2380 * the difference is about 5% with 50000+ watchers.
2381 */
2382#if EV_USE_4HEAP
2383
2384#define DHEAP 4
2385#define HEAP0 (DHEAP - 1) /* index of first element in heap */
2386#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
2387#define UPHEAP_DONE(p,k) ((p) == (k))
2388
2389/* away from the root */
2390inline_speed void
2391downheap (ANHE *heap, int N, int k)
861{ 2392{
862 if (!ev_is_active (&pipeev)) 2393 ANHE he = heap [k];
2394 ANHE *E = heap + N + HEAP0;
2395
2396 for (;;)
863 { 2397 {
864#if EV_USE_EVENTFD 2398 ev_tstamp minat;
865 if ((evfd = eventfd (0, 0)) >= 0) 2399 ANHE *minpos;
2400 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
2401
2402 /* find minimum child */
2403 if (ecb_expect_true (pos + DHEAP - 1 < E))
866 { 2404 {
867 evpipe [0] = -1; 2405 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
868 fd_intern (evfd); 2406 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
869 ev_io_set (&pipeev, evfd, EV_READ); 2407 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2408 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2409 }
2410 else if (pos < E)
2411 {
2412 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2413 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2414 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2415 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
870 } 2416 }
871 else 2417 else
2418 break;
2419
2420 if (ANHE_at (he) <= minat)
2421 break;
2422
2423 heap [k] = *minpos;
2424 ev_active (ANHE_w (*minpos)) = k;
2425
2426 k = minpos - heap;
2427 }
2428
2429 heap [k] = he;
2430 ev_active (ANHE_w (he)) = k;
2431}
2432
2433#else /* 4HEAP */
2434
2435#define HEAP0 1
2436#define HPARENT(k) ((k) >> 1)
2437#define UPHEAP_DONE(p,k) (!(p))
2438
2439/* away from the root */
2440inline_speed void
2441downheap (ANHE *heap, int N, int k)
2442{
2443 ANHE he = heap [k];
2444
2445 for (;;)
2446 {
2447 int c = k << 1;
2448
2449 if (c >= N + HEAP0)
2450 break;
2451
2452 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
2453 ? 1 : 0;
2454
2455 if (ANHE_at (he) <= ANHE_at (heap [c]))
2456 break;
2457
2458 heap [k] = heap [c];
2459 ev_active (ANHE_w (heap [k])) = k;
2460
2461 k = c;
2462 }
2463
2464 heap [k] = he;
2465 ev_active (ANHE_w (he)) = k;
2466}
2467#endif
2468
2469/* towards the root */
2470inline_speed void
2471upheap (ANHE *heap, int k)
2472{
2473 ANHE he = heap [k];
2474
2475 for (;;)
2476 {
2477 int p = HPARENT (k);
2478
2479 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
2480 break;
2481
2482 heap [k] = heap [p];
2483 ev_active (ANHE_w (heap [k])) = k;
2484 k = p;
2485 }
2486
2487 heap [k] = he;
2488 ev_active (ANHE_w (he)) = k;
2489}
2490
2491/* move an element suitably so it is in a correct place */
2492inline_size void
2493adjustheap (ANHE *heap, int N, int k)
2494{
2495 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
2496 upheap (heap, k);
2497 else
2498 downheap (heap, N, k);
2499}
2500
2501/* rebuild the heap: this function is used only once and executed rarely */
2502inline_size void
2503reheap (ANHE *heap, int N)
2504{
2505 int i;
2506
2507 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
2508 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
2509 for (i = 0; i < N; ++i)
2510 upheap (heap, i + HEAP0);
2511}
2512
2513/*****************************************************************************/
2514
2515/* associate signal watchers to a signal signal */
2516typedef struct
2517{
2518 EV_ATOMIC_T pending;
2519#if EV_MULTIPLICITY
2520 EV_P;
2521#endif
2522 WL head;
2523} ANSIG;
2524
2525static ANSIG signals [EV_NSIG - 1];
2526
2527/*****************************************************************************/
2528
2529#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2530
2531ecb_noinline ecb_cold
2532static void
2533evpipe_init (EV_P)
2534{
2535 if (!ev_is_active (&pipe_w))
2536 {
2537 int fds [2];
2538
2539# if EV_USE_EVENTFD
2540 fds [0] = -1;
2541 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2542 if (fds [1] < 0 && errno == EINVAL)
2543 fds [1] = eventfd (0, 0);
2544
2545 if (fds [1] < 0)
872#endif 2546# endif
873 { 2547 {
874 while (pipe (evpipe)) 2548 while (pipe (fds))
875 syserr ("(libev) error creating signal/async pipe"); 2549 ev_syserr ("(libev) error creating signal/async pipe");
876 2550
877 fd_intern (evpipe [0]); 2551 fd_intern (fds [0]);
878 fd_intern (evpipe [1]);
879 ev_io_set (&pipeev, evpipe [0], EV_READ);
880 } 2552 }
881 2553
2554 evpipe [0] = fds [0];
2555
2556 if (evpipe [1] < 0)
2557 evpipe [1] = fds [1]; /* first call, set write fd */
2558 else
2559 {
2560 /* on subsequent calls, do not change evpipe [1] */
2561 /* so that evpipe_write can always rely on its value. */
2562 /* this branch does not do anything sensible on windows, */
2563 /* so must not be executed on windows */
2564
2565 dup2 (fds [1], evpipe [1]);
2566 close (fds [1]);
2567 }
2568
2569 fd_intern (evpipe [1]);
2570
2571 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
882 ev_io_start (EV_A_ &pipeev); 2572 ev_io_start (EV_A_ &pipe_w);
883 ev_unref (EV_A); /* watcher should not keep loop alive */ 2573 ev_unref (EV_A); /* watcher should not keep loop alive */
884 } 2574 }
885} 2575}
886 2576
887void inline_size 2577inline_speed void
888evpipe_write (EV_P_ EV_ATOMIC_T *flag) 2578evpipe_write (EV_P_ EV_ATOMIC_T *flag)
889{ 2579{
890 if (!*flag) 2580 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2581
2582 if (ecb_expect_true (*flag))
2583 return;
2584
2585 *flag = 1;
2586 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2587
2588 pipe_write_skipped = 1;
2589
2590 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2591
2592 if (pipe_write_wanted)
891 { 2593 {
2594 int old_errno;
2595
2596 pipe_write_skipped = 0;
2597 ECB_MEMORY_FENCE_RELEASE;
2598
892 int old_errno = errno; /* save errno because write might clobber it */ 2599 old_errno = errno; /* save errno because write will clobber it */
893
894 *flag = 1;
895 2600
896#if EV_USE_EVENTFD 2601#if EV_USE_EVENTFD
897 if (evfd >= 0) 2602 if (evpipe [0] < 0)
898 { 2603 {
899 uint64_t counter = 1; 2604 uint64_t counter = 1;
900 write (evfd, &counter, sizeof (uint64_t)); 2605 write (evpipe [1], &counter, sizeof (uint64_t));
901 } 2606 }
902 else 2607 else
903#endif 2608#endif
2609 {
2610#ifdef _WIN32
2611 WSABUF buf;
2612 DWORD sent;
2613 buf.buf = (char *)&buf;
2614 buf.len = 1;
2615 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2616#else
904 write (evpipe [1], &old_errno, 1); 2617 write (evpipe [1], &(evpipe [1]), 1);
2618#endif
2619 }
905 2620
906 errno = old_errno; 2621 errno = old_errno;
907 } 2622 }
908} 2623}
909 2624
2625/* called whenever the libev signal pipe */
2626/* got some events (signal, async) */
910static void 2627static void
911pipecb (EV_P_ ev_io *iow, int revents) 2628pipecb (EV_P_ ev_io *iow, int revents)
912{ 2629{
2630 int i;
2631
2632 if (revents & EV_READ)
2633 {
913#if EV_USE_EVENTFD 2634#if EV_USE_EVENTFD
914 if (evfd >= 0) 2635 if (evpipe [0] < 0)
915 { 2636 {
916 uint64_t counter = 1; 2637 uint64_t counter;
917 read (evfd, &counter, sizeof (uint64_t)); 2638 read (evpipe [1], &counter, sizeof (uint64_t));
918 } 2639 }
919 else 2640 else
920#endif 2641#endif
921 { 2642 {
922 char dummy; 2643 char dummy[4];
2644#ifdef _WIN32
2645 WSABUF buf;
2646 DWORD recvd;
2647 DWORD flags = 0;
2648 buf.buf = dummy;
2649 buf.len = sizeof (dummy);
2650 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2651#else
923 read (evpipe [0], &dummy, 1); 2652 read (evpipe [0], &dummy, sizeof (dummy));
2653#endif
2654 }
2655 }
2656
2657 pipe_write_skipped = 0;
2658
2659 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2660
2661#if EV_SIGNAL_ENABLE
2662 if (sig_pending)
924 } 2663 {
2664 sig_pending = 0;
925 2665
926 if (gotsig && ev_is_default_loop (EV_A)) 2666 ECB_MEMORY_FENCE;
927 {
928 int signum;
929 gotsig = 0;
930 2667
931 for (signum = signalmax; signum--; ) 2668 for (i = EV_NSIG - 1; i--; )
932 if (signals [signum].gotsig) 2669 if (ecb_expect_false (signals [i].pending))
933 ev_feed_signal_event (EV_A_ signum + 1); 2670 ev_feed_signal_event (EV_A_ i + 1);
934 } 2671 }
2672#endif
935 2673
936#if EV_ASYNC_ENABLE 2674#if EV_ASYNC_ENABLE
937 if (gotasync) 2675 if (async_pending)
938 { 2676 {
939 int i; 2677 async_pending = 0;
940 gotasync = 0; 2678
2679 ECB_MEMORY_FENCE;
941 2680
942 for (i = asynccnt; i--; ) 2681 for (i = asynccnt; i--; )
943 if (asyncs [i]->sent) 2682 if (asyncs [i]->sent)
944 { 2683 {
945 asyncs [i]->sent = 0; 2684 asyncs [i]->sent = 0;
2685 ECB_MEMORY_FENCE_RELEASE;
946 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2686 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
947 } 2687 }
948 } 2688 }
949#endif 2689#endif
950} 2690}
951 2691
952/*****************************************************************************/ 2692/*****************************************************************************/
953 2693
2694void
2695ev_feed_signal (int signum) EV_NOEXCEPT
2696{
2697#if EV_MULTIPLICITY
2698 EV_P;
2699 ECB_MEMORY_FENCE_ACQUIRE;
2700 EV_A = signals [signum - 1].loop;
2701
2702 if (!EV_A)
2703 return;
2704#endif
2705
2706 signals [signum - 1].pending = 1;
2707 evpipe_write (EV_A_ &sig_pending);
2708}
2709
954static void 2710static void
955ev_sighandler (int signum) 2711ev_sighandler (int signum)
956{ 2712{
2713#ifdef _WIN32
2714 signal (signum, ev_sighandler);
2715#endif
2716
2717 ev_feed_signal (signum);
2718}
2719
2720ecb_noinline
2721void
2722ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
2723{
2724 WL w;
2725
2726 if (ecb_expect_false (signum <= 0 || signum >= EV_NSIG))
2727 return;
2728
2729 --signum;
2730
957#if EV_MULTIPLICITY 2731#if EV_MULTIPLICITY
958 struct ev_loop *loop = &default_loop_struct; 2732 /* it is permissible to try to feed a signal to the wrong loop */
959#endif 2733 /* or, likely more useful, feeding a signal nobody is waiting for */
960 2734
961#if _WIN32 2735 if (ecb_expect_false (signals [signum].loop != EV_A))
962 signal (signum, ev_sighandler);
963#endif
964
965 signals [signum - 1].gotsig = 1;
966 evpipe_write (EV_A_ &gotsig);
967}
968
969void noinline
970ev_feed_signal_event (EV_P_ int signum)
971{
972 WL w;
973
974#if EV_MULTIPLICITY
975 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
976#endif
977
978 --signum;
979
980 if (signum < 0 || signum >= signalmax)
981 return; 2736 return;
2737#endif
982 2738
983 signals [signum].gotsig = 0; 2739 signals [signum].pending = 0;
2740 ECB_MEMORY_FENCE_RELEASE;
984 2741
985 for (w = signals [signum].head; w; w = w->next) 2742 for (w = signals [signum].head; w; w = w->next)
986 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2743 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
987} 2744}
988 2745
2746#if EV_USE_SIGNALFD
2747static void
2748sigfdcb (EV_P_ ev_io *iow, int revents)
2749{
2750 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2751
2752 for (;;)
2753 {
2754 ssize_t res = read (sigfd, si, sizeof (si));
2755
2756 /* not ISO-C, as res might be -1, but works with SuS */
2757 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2758 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2759
2760 if (res < (ssize_t)sizeof (si))
2761 break;
2762 }
2763}
2764#endif
2765
2766#endif
2767
989/*****************************************************************************/ 2768/*****************************************************************************/
990 2769
2770#if EV_CHILD_ENABLE
991static WL childs [EV_PID_HASHSIZE]; 2771static WL childs [EV_PID_HASHSIZE];
992
993#ifndef _WIN32
994 2772
995static ev_signal childev; 2773static ev_signal childev;
996 2774
997#ifndef WIFCONTINUED 2775#ifndef WIFCONTINUED
998# define WIFCONTINUED(status) 0 2776# define WIFCONTINUED(status) 0
999#endif 2777#endif
1000 2778
1001void inline_speed 2779/* handle a single child status event */
2780inline_speed void
1002child_reap (EV_P_ int chain, int pid, int status) 2781child_reap (EV_P_ int chain, int pid, int status)
1003{ 2782{
1004 ev_child *w; 2783 ev_child *w;
1005 int traced = WIFSTOPPED (status) || WIFCONTINUED (status); 2784 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
1006 2785
1007 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2786 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
1008 { 2787 {
1009 if ((w->pid == pid || !w->pid) 2788 if ((w->pid == pid || !w->pid)
1010 && (!traced || (w->flags & 1))) 2789 && (!traced || (w->flags & 1)))
1011 { 2790 {
1012 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */ 2791 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
… …
1019 2798
1020#ifndef WCONTINUED 2799#ifndef WCONTINUED
1021# define WCONTINUED 0 2800# define WCONTINUED 0
1022#endif 2801#endif
1023 2802
2803/* called on sigchld etc., calls waitpid */
1024static void 2804static void
1025childcb (EV_P_ ev_signal *sw, int revents) 2805childcb (EV_P_ ev_signal *sw, int revents)
1026{ 2806{
1027 int pid, status; 2807 int pid, status;
1028 2808
… …
1036 /* make sure we are called again until all children have been reaped */ 2816 /* make sure we are called again until all children have been reaped */
1037 /* we need to do it this way so that the callback gets called before we continue */ 2817 /* we need to do it this way so that the callback gets called before we continue */
1038 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2818 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
1039 2819
1040 child_reap (EV_A_ pid, pid, status); 2820 child_reap (EV_A_ pid, pid, status);
1041 if (EV_PID_HASHSIZE > 1) 2821 if ((EV_PID_HASHSIZE) > 1)
1042 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2822 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
1043} 2823}
1044 2824
1045#endif 2825#endif
1046 2826
1047/*****************************************************************************/ 2827/*****************************************************************************/
1048 2828
2829#if EV_USE_IOCP
2830# include "ev_iocp.c"
2831#endif
1049#if EV_USE_PORT 2832#if EV_USE_PORT
1050# include "ev_port.c" 2833# include "ev_port.c"
1051#endif 2834#endif
1052#if EV_USE_KQUEUE 2835#if EV_USE_KQUEUE
1053# include "ev_kqueue.c" 2836# include "ev_kqueue.c"
1054#endif 2837#endif
1055#if EV_USE_EPOLL 2838#if EV_USE_EPOLL
1056# include "ev_epoll.c" 2839# include "ev_epoll.c"
1057#endif 2840#endif
2841#if EV_USE_LINUXAIO
2842# include "ev_linuxaio.c"
2843#endif
2844#if EV_USE_IOURING
2845# include "ev_iouring.c"
2846#endif
1058#if EV_USE_POLL 2847#if EV_USE_POLL
1059# include "ev_poll.c" 2848# include "ev_poll.c"
1060#endif 2849#endif
1061#if EV_USE_SELECT 2850#if EV_USE_SELECT
1062# include "ev_select.c" 2851# include "ev_select.c"
1063#endif 2852#endif
1064 2853
1065int 2854ecb_cold int
1066ev_version_major (void) 2855ev_version_major (void) EV_NOEXCEPT
1067{ 2856{
1068 return EV_VERSION_MAJOR; 2857 return EV_VERSION_MAJOR;
1069} 2858}
1070 2859
1071int 2860ecb_cold int
1072ev_version_minor (void) 2861ev_version_minor (void) EV_NOEXCEPT
1073{ 2862{
1074 return EV_VERSION_MINOR; 2863 return EV_VERSION_MINOR;
1075} 2864}
1076 2865
1077/* return true if we are running with elevated privileges and should ignore env variables */ 2866/* return true if we are running with elevated privileges and should ignore env variables */
1078int inline_size 2867inline_size ecb_cold int
1079enable_secure (void) 2868enable_secure (void)
1080{ 2869{
1081#ifdef _WIN32 2870#ifdef _WIN32
1082 return 0; 2871 return 0;
1083#else 2872#else
1084 return getuid () != geteuid () 2873 return getuid () != geteuid ()
1085 || getgid () != getegid (); 2874 || getgid () != getegid ();
1086#endif 2875#endif
1087} 2876}
1088 2877
2878ecb_cold
1089unsigned int 2879unsigned int
1090ev_supported_backends (void) 2880ev_supported_backends (void) EV_NOEXCEPT
1091{ 2881{
1092 unsigned int flags = 0; 2882 unsigned int flags = 0;
1093 2883
1094 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2884 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1095 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2885 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1096 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 2886 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2887 if (EV_USE_LINUXAIO) flags |= EVBACKEND_LINUXAIO;
2888 if (EV_USE_IOURING ) flags |= EVBACKEND_IOURING;
1097 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 2889 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1098 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2890 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
1099 2891
1100 return flags; 2892 return flags;
1101} 2893}
1102 2894
2895ecb_cold
1103unsigned int 2896unsigned int
1104ev_recommended_backends (void) 2897ev_recommended_backends (void) EV_NOEXCEPT
1105{ 2898{
1106 unsigned int flags = ev_supported_backends (); 2899 unsigned int flags = ev_supported_backends ();
1107 2900
1108#ifndef __NetBSD__ 2901#ifndef __NetBSD__
1109 /* kqueue is borked on everything but netbsd apparently */ 2902 /* kqueue is borked on everything but netbsd apparently */
1110 /* it usually doesn't work correctly on anything but sockets and pipes */ 2903 /* it usually doesn't work correctly on anything but sockets and pipes */
1111 flags &= ~EVBACKEND_KQUEUE; 2904 flags &= ~EVBACKEND_KQUEUE;
1112#endif 2905#endif
1113#ifdef __APPLE__ 2906#ifdef __APPLE__
1114 // flags &= ~EVBACKEND_KQUEUE; for documentation 2907 /* only select works correctly on that "unix-certified" platform */
2908 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2909 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2910#endif
2911#ifdef __FreeBSD__
2912 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2913#endif
2914
2915 /* TODO: linuxaio is very experimental */
2916#if !EV_RECOMMEND_LINUXAIO
2917 flags &= ~EVBACKEND_LINUXAIO;
2918#endif
2919 /* TODO: linuxaio is super experimental */
2920#if !EV_RECOMMEND_IOURING
1115 flags &= ~EVBACKEND_POLL; 2921 flags &= ~EVBACKEND_IOURING;
1116#endif 2922#endif
1117 2923
1118 return flags; 2924 return flags;
1119} 2925}
1120 2926
2927ecb_cold
1121unsigned int 2928unsigned int
1122ev_embeddable_backends (void) 2929ev_embeddable_backends (void) EV_NOEXCEPT
1123{ 2930{
1124 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2931 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1125 2932
1126 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2933 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1127 /* please fix it and tell me how to detect the fix */ 2934 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1128 flags &= ~EVBACKEND_EPOLL; 2935 flags &= ~EVBACKEND_EPOLL;
2936
2937 /* EVBACKEND_LINUXAIO is theoretically embeddable, but suffers from a performance overhead */
2938
2939 /* EVBACKEND_IOURING is practically embeddable, but the current implementation is not
2940 * because our backend_fd is the epoll fd we need as fallback.
2941 * if the kernel ever is fixed, this might change...
2942 */
1129 2943
1130 return flags; 2944 return flags;
1131} 2945}
1132 2946
1133unsigned int 2947unsigned int
1134ev_backend (EV_P) 2948ev_backend (EV_P) EV_NOEXCEPT
1135{ 2949{
1136 return backend; 2950 return backend;
1137} 2951}
1138 2952
2953#if EV_FEATURE_API
1139unsigned int 2954unsigned int
1140ev_loop_count (EV_P) 2955ev_iteration (EV_P) EV_NOEXCEPT
1141{ 2956{
1142 return loop_count; 2957 return loop_count;
1143} 2958}
1144 2959
2960unsigned int
2961ev_depth (EV_P) EV_NOEXCEPT
2962{
2963 return loop_depth;
2964}
2965
1145void 2966void
1146ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2967ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1147{ 2968{
1148 io_blocktime = interval; 2969 io_blocktime = interval;
1149} 2970}
1150 2971
1151void 2972void
1152ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2973ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1153{ 2974{
1154 timeout_blocktime = interval; 2975 timeout_blocktime = interval;
1155} 2976}
1156 2977
1157static void noinline 2978void
2979ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
2980{
2981 userdata = data;
2982}
2983
2984void *
2985ev_userdata (EV_P) EV_NOEXCEPT
2986{
2987 return userdata;
2988}
2989
2990void
2991ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
2992{
2993 invoke_cb = invoke_pending_cb;
2994}
2995
2996void
2997ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
2998{
2999 release_cb = release;
3000 acquire_cb = acquire;
3001}
3002#endif
3003
3004/* initialise a loop structure, must be zero-initialised */
3005ecb_noinline ecb_cold
3006static void
1158loop_init (EV_P_ unsigned int flags) 3007loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1159{ 3008{
1160 if (!backend) 3009 if (!backend)
1161 { 3010 {
3011 origflags = flags;
3012
3013#if EV_USE_REALTIME
3014 if (!have_realtime)
3015 {
3016 struct timespec ts;
3017
3018 if (!clock_gettime (CLOCK_REALTIME, &ts))
3019 have_realtime = 1;
3020 }
3021#endif
3022
1162#if EV_USE_MONOTONIC 3023#if EV_USE_MONOTONIC
3024 if (!have_monotonic)
1163 { 3025 {
1164 struct timespec ts; 3026 struct timespec ts;
3027
1165 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 3028 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1166 have_monotonic = 1; 3029 have_monotonic = 1;
1167 } 3030 }
1168#endif
1169
1170 ev_rt_now = ev_time ();
1171 mn_now = get_clock ();
1172 now_floor = mn_now;
1173 rtmn_diff = ev_rt_now - mn_now;
1174
1175 io_blocktime = 0.;
1176 timeout_blocktime = 0.;
1177 backend = 0;
1178 backend_fd = -1;
1179 gotasync = 0;
1180#if EV_USE_INOTIFY
1181 fs_fd = -2;
1182#endif 3031#endif
1183 3032
1184 /* pid check not overridable via env */ 3033 /* pid check not overridable via env */
1185#ifndef _WIN32 3034#ifndef _WIN32
1186 if (flags & EVFLAG_FORKCHECK) 3035 if (flags & EVFLAG_FORKCHECK)
… …
1190 if (!(flags & EVFLAG_NOENV) 3039 if (!(flags & EVFLAG_NOENV)
1191 && !enable_secure () 3040 && !enable_secure ()
1192 && getenv ("LIBEV_FLAGS")) 3041 && getenv ("LIBEV_FLAGS"))
1193 flags = atoi (getenv ("LIBEV_FLAGS")); 3042 flags = atoi (getenv ("LIBEV_FLAGS"));
1194 3043
1195 if (!(flags & 0x0000ffffU)) 3044 ev_rt_now = ev_time ();
3045 mn_now = get_clock ();
3046 now_floor = mn_now;
3047 rtmn_diff = ev_rt_now - mn_now;
3048#if EV_FEATURE_API
3049 invoke_cb = ev_invoke_pending;
3050#endif
3051
3052 io_blocktime = 0.;
3053 timeout_blocktime = 0.;
3054 backend = 0;
3055 backend_fd = -1;
3056 sig_pending = 0;
3057#if EV_ASYNC_ENABLE
3058 async_pending = 0;
3059#endif
3060 pipe_write_skipped = 0;
3061 pipe_write_wanted = 0;
3062 evpipe [0] = -1;
3063 evpipe [1] = -1;
3064#if EV_USE_INOTIFY
3065 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
3066#endif
3067#if EV_USE_SIGNALFD
3068 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
3069#endif
3070
3071 if (!(flags & EVBACKEND_MASK))
1196 flags |= ev_recommended_backends (); 3072 flags |= ev_recommended_backends ();
1197 3073
3074#if EV_USE_IOCP
3075 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
3076#endif
1198#if EV_USE_PORT 3077#if EV_USE_PORT
1199 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 3078 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1200#endif 3079#endif
1201#if EV_USE_KQUEUE 3080#if EV_USE_KQUEUE
1202 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 3081 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
3082#endif
3083#if EV_USE_IOURING
3084 if (!backend && (flags & EVBACKEND_IOURING )) backend = iouring_init (EV_A_ flags);
3085#endif
3086#if EV_USE_LINUXAIO
3087 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
1203#endif 3088#endif
1204#if EV_USE_EPOLL 3089#if EV_USE_EPOLL
1205 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 3090 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1206#endif 3091#endif
1207#if EV_USE_POLL 3092#if EV_USE_POLL
1208 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 3093 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1209#endif 3094#endif
1210#if EV_USE_SELECT 3095#if EV_USE_SELECT
1211 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 3096 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1212#endif 3097#endif
1213 3098
3099 ev_prepare_init (&pending_w, pendingcb);
3100
3101#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1214 ev_init (&pipeev, pipecb); 3102 ev_init (&pipe_w, pipecb);
1215 ev_set_priority (&pipeev, EV_MAXPRI); 3103 ev_set_priority (&pipe_w, EV_MAXPRI);
3104#endif
1216 } 3105 }
1217} 3106}
1218 3107
1219static void noinline 3108/* free up a loop structure */
3109ecb_cold
3110void
1220loop_destroy (EV_P) 3111ev_loop_destroy (EV_P)
1221{ 3112{
1222 int i; 3113 int i;
1223 3114
3115#if EV_MULTIPLICITY
3116 /* mimic free (0) */
3117 if (!EV_A)
3118 return;
3119#endif
3120
3121#if EV_CLEANUP_ENABLE
3122 /* queue cleanup watchers (and execute them) */
3123 if (ecb_expect_false (cleanupcnt))
3124 {
3125 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
3126 EV_INVOKE_PENDING;
3127 }
3128#endif
3129
3130#if EV_CHILD_ENABLE
3131 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
3132 {
3133 ev_ref (EV_A); /* child watcher */
3134 ev_signal_stop (EV_A_ &childev);
3135 }
3136#endif
3137
1224 if (ev_is_active (&pipeev)) 3138 if (ev_is_active (&pipe_w))
1225 { 3139 {
1226 ev_ref (EV_A); /* signal watcher */ 3140 /*ev_ref (EV_A);*/
1227 ev_io_stop (EV_A_ &pipeev); 3141 /*ev_io_stop (EV_A_ &pipe_w);*/
1228 3142
3143 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
3144 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
3145 }
3146
1229#if EV_USE_EVENTFD 3147#if EV_USE_SIGNALFD
1230 if (evfd >= 0) 3148 if (ev_is_active (&sigfd_w))
1231 close (evfd); 3149 close (sigfd);
1232#endif 3150#endif
1233
1234 if (evpipe [0] >= 0)
1235 {
1236 close (evpipe [0]);
1237 close (evpipe [1]);
1238 }
1239 }
1240 3151
1241#if EV_USE_INOTIFY 3152#if EV_USE_INOTIFY
1242 if (fs_fd >= 0) 3153 if (fs_fd >= 0)
1243 close (fs_fd); 3154 close (fs_fd);
1244#endif 3155#endif
1245 3156
1246 if (backend_fd >= 0) 3157 if (backend_fd >= 0)
1247 close (backend_fd); 3158 close (backend_fd);
1248 3159
3160#if EV_USE_IOCP
3161 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
3162#endif
1249#if EV_USE_PORT 3163#if EV_USE_PORT
1250 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3164 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1251#endif 3165#endif
1252#if EV_USE_KQUEUE 3166#if EV_USE_KQUEUE
1253 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3167 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3168#endif
3169#if EV_USE_IOURING
3170 if (backend == EVBACKEND_IOURING ) iouring_destroy (EV_A);
3171#endif
3172#if EV_USE_LINUXAIO
3173 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
1254#endif 3174#endif
1255#if EV_USE_EPOLL 3175#if EV_USE_EPOLL
1256 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3176 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1257#endif 3177#endif
1258#if EV_USE_POLL 3178#if EV_USE_POLL
1259 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3179 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1260#endif 3180#endif
1261#if EV_USE_SELECT 3181#if EV_USE_SELECT
1262 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3182 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1263#endif 3183#endif
1264 3184
1265 for (i = NUMPRI; i--; ) 3185 for (i = NUMPRI; i--; )
1266 { 3186 {
1267 array_free (pending, [i]); 3187 array_free (pending, [i]);
1268#if EV_IDLE_ENABLE 3188#if EV_IDLE_ENABLE
1269 array_free (idle, [i]); 3189 array_free (idle, [i]);
1270#endif 3190#endif
1271 } 3191 }
1272 3192
1273 ev_free (anfds); anfdmax = 0; 3193 ev_free (anfds); anfds = 0; anfdmax = 0;
1274 3194
1275 /* have to use the microsoft-never-gets-it-right macro */ 3195 /* have to use the microsoft-never-gets-it-right macro */
3196 array_free (rfeed, EMPTY);
1276 array_free (fdchange, EMPTY); 3197 array_free (fdchange, EMPTY);
1277 array_free (timer, EMPTY); 3198 array_free (timer, EMPTY);
1278#if EV_PERIODIC_ENABLE 3199#if EV_PERIODIC_ENABLE
1279 array_free (periodic, EMPTY); 3200 array_free (periodic, EMPTY);
1280#endif 3201#endif
1281#if EV_FORK_ENABLE 3202#if EV_FORK_ENABLE
1282 array_free (fork, EMPTY); 3203 array_free (fork, EMPTY);
1283#endif 3204#endif
3205#if EV_CLEANUP_ENABLE
3206 array_free (cleanup, EMPTY);
3207#endif
1284 array_free (prepare, EMPTY); 3208 array_free (prepare, EMPTY);
1285 array_free (check, EMPTY); 3209 array_free (check, EMPTY);
1286#if EV_ASYNC_ENABLE 3210#if EV_ASYNC_ENABLE
1287 array_free (async, EMPTY); 3211 array_free (async, EMPTY);
1288#endif 3212#endif
1289 3213
1290 backend = 0; 3214 backend = 0;
3215
3216#if EV_MULTIPLICITY
3217 if (ev_is_default_loop (EV_A))
3218#endif
3219 ev_default_loop_ptr = 0;
3220#if EV_MULTIPLICITY
3221 else
3222 ev_free (EV_A);
3223#endif
1291} 3224}
1292 3225
1293#if EV_USE_INOTIFY 3226#if EV_USE_INOTIFY
1294void inline_size infy_fork (EV_P); 3227inline_size void infy_fork (EV_P);
1295#endif 3228#endif
1296 3229
1297void inline_size 3230inline_size void
1298loop_fork (EV_P) 3231loop_fork (EV_P)
1299{ 3232{
1300#if EV_USE_PORT 3233#if EV_USE_PORT
1301 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3234 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1302#endif 3235#endif
1303#if EV_USE_KQUEUE 3236#if EV_USE_KQUEUE
1304 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 3237 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3238#endif
3239#if EV_USE_IOURING
3240 if (backend == EVBACKEND_IOURING ) iouring_fork (EV_A);
3241#endif
3242#if EV_USE_LINUXAIO
3243 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
1305#endif 3244#endif
1306#if EV_USE_EPOLL 3245#if EV_USE_EPOLL
1307 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3246 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1308#endif 3247#endif
1309#if EV_USE_INOTIFY 3248#if EV_USE_INOTIFY
1310 infy_fork (EV_A); 3249 infy_fork (EV_A);
1311#endif 3250#endif
1312 3251
1313 if (ev_is_active (&pipeev)) 3252#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
3253 if (ev_is_active (&pipe_w) && postfork != 2)
3254 {
3255 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
3256
3257 ev_ref (EV_A);
3258 ev_io_stop (EV_A_ &pipe_w);
3259
3260 if (evpipe [0] >= 0)
3261 EV_WIN32_CLOSE_FD (evpipe [0]);
3262
3263 evpipe_init (EV_A);
3264 /* iterate over everything, in case we missed something before */
3265 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1314 { 3266 }
1315 /* this "locks" the handlers against writing to the pipe */ 3267#endif
1316 /* while we modify the fd vars */ 3268
1317 gotsig = 1; 3269 postfork = 0;
3270}
3271
3272#if EV_MULTIPLICITY
3273
3274ecb_cold
3275struct ev_loop *
3276ev_loop_new (unsigned int flags) EV_NOEXCEPT
3277{
3278 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
3279
3280 memset (EV_A, 0, sizeof (struct ev_loop));
3281 loop_init (EV_A_ flags);
3282
3283 if (ev_backend (EV_A))
3284 return EV_A;
3285
3286 ev_free (EV_A);
3287 return 0;
3288}
3289
3290#endif /* multiplicity */
3291
3292#if EV_VERIFY
3293ecb_noinline ecb_cold
3294static void
3295verify_watcher (EV_P_ W w)
3296{
3297 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
3298
3299 if (w->pending)
3300 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
3301}
3302
3303ecb_noinline ecb_cold
3304static void
3305verify_heap (EV_P_ ANHE *heap, int N)
3306{
3307 int i;
3308
3309 for (i = HEAP0; i < N + HEAP0; ++i)
3310 {
3311 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
3312 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
3313 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
3314
3315 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
3316 }
3317}
3318
3319ecb_noinline ecb_cold
3320static void
3321array_verify (EV_P_ W *ws, int cnt)
3322{
3323 while (cnt--)
3324 {
3325 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
3326 verify_watcher (EV_A_ ws [cnt]);
3327 }
3328}
3329#endif
3330
3331#if EV_FEATURE_API
3332void ecb_cold
3333ev_verify (EV_P) EV_NOEXCEPT
3334{
3335#if EV_VERIFY
3336 int i;
3337 WL w, w2;
3338
3339 assert (activecnt >= -1);
3340
3341 assert (fdchangemax >= fdchangecnt);
3342 for (i = 0; i < fdchangecnt; ++i)
3343 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
3344
3345 assert (anfdmax >= 0);
3346 for (i = 0; i < anfdmax; ++i)
3347 {
3348 int j = 0;
3349
3350 for (w = w2 = anfds [i].head; w; w = w->next)
3351 {
3352 verify_watcher (EV_A_ (W)w);
3353
3354 if (j++ & 1)
3355 {
3356 assert (("libev: io watcher list contains a loop", w != w2));
3357 w2 = w2->next;
3358 }
3359
3360 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
3361 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
3362 }
3363 }
3364
3365 assert (timermax >= timercnt);
3366 verify_heap (EV_A_ timers, timercnt);
3367
3368#if EV_PERIODIC_ENABLE
3369 assert (periodicmax >= periodiccnt);
3370 verify_heap (EV_A_ periodics, periodiccnt);
3371#endif
3372
3373 for (i = NUMPRI; i--; )
3374 {
3375 assert (pendingmax [i] >= pendingcnt [i]);
3376#if EV_IDLE_ENABLE
3377 assert (idleall >= 0);
3378 assert (idlemax [i] >= idlecnt [i]);
3379 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
3380#endif
3381 }
3382
3383#if EV_FORK_ENABLE
3384 assert (forkmax >= forkcnt);
3385 array_verify (EV_A_ (W *)forks, forkcnt);
3386#endif
3387
3388#if EV_CLEANUP_ENABLE
3389 assert (cleanupmax >= cleanupcnt);
3390 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3391#endif
3392
1318#if EV_ASYNC_ENABLE 3393#if EV_ASYNC_ENABLE
1319 gotasync = 1; 3394 assert (asyncmax >= asynccnt);
3395 array_verify (EV_A_ (W *)asyncs, asynccnt);
3396#endif
3397
3398#if EV_PREPARE_ENABLE
3399 assert (preparemax >= preparecnt);
3400 array_verify (EV_A_ (W *)prepares, preparecnt);
3401#endif
3402
3403#if EV_CHECK_ENABLE
3404 assert (checkmax >= checkcnt);
3405 array_verify (EV_A_ (W *)checks, checkcnt);
3406#endif
3407
3408# if 0
3409#if EV_CHILD_ENABLE
3410 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
3411 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3412#endif
1320#endif 3413# endif
1321
1322 ev_ref (EV_A);
1323 ev_io_stop (EV_A_ &pipeev);
1324
1325#if EV_USE_EVENTFD
1326 if (evfd >= 0)
1327 close (evfd);
1328#endif 3414#endif
1329
1330 if (evpipe [0] >= 0)
1331 {
1332 close (evpipe [0]);
1333 close (evpipe [1]);
1334 }
1335
1336 evpipe_init (EV_A);
1337 /* now iterate over everything, in case we missed something */
1338 pipecb (EV_A_ &pipeev, EV_READ);
1339 }
1340
1341 postfork = 0;
1342} 3415}
3416#endif
1343 3417
1344#if EV_MULTIPLICITY 3418#if EV_MULTIPLICITY
3419ecb_cold
1345struct ev_loop * 3420struct ev_loop *
1346ev_loop_new (unsigned int flags)
1347{
1348 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1349
1350 memset (loop, 0, sizeof (struct ev_loop));
1351
1352 loop_init (EV_A_ flags);
1353
1354 if (ev_backend (EV_A))
1355 return loop;
1356
1357 return 0;
1358}
1359
1360void
1361ev_loop_destroy (EV_P)
1362{
1363 loop_destroy (EV_A);
1364 ev_free (loop);
1365}
1366
1367void
1368ev_loop_fork (EV_P)
1369{
1370 postfork = 1; /* must be in line with ev_default_fork */
1371}
1372
1373#endif
1374
1375#if EV_MULTIPLICITY
1376struct ev_loop *
1377ev_default_loop_init (unsigned int flags)
1378#else 3421#else
1379int 3422int
3423#endif
1380ev_default_loop (unsigned int flags) 3424ev_default_loop (unsigned int flags) EV_NOEXCEPT
1381#endif
1382{ 3425{
1383 if (!ev_default_loop_ptr) 3426 if (!ev_default_loop_ptr)
1384 { 3427 {
1385#if EV_MULTIPLICITY 3428#if EV_MULTIPLICITY
1386 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 3429 EV_P = ev_default_loop_ptr = &default_loop_struct;
1387#else 3430#else
1388 ev_default_loop_ptr = 1; 3431 ev_default_loop_ptr = 1;
1389#endif 3432#endif
1390 3433
1391 loop_init (EV_A_ flags); 3434 loop_init (EV_A_ flags);
1392 3435
1393 if (ev_backend (EV_A)) 3436 if (ev_backend (EV_A))
1394 { 3437 {
1395#ifndef _WIN32 3438#if EV_CHILD_ENABLE
1396 ev_signal_init (&childev, childcb, SIGCHLD); 3439 ev_signal_init (&childev, childcb, SIGCHLD);
1397 ev_set_priority (&childev, EV_MAXPRI); 3440 ev_set_priority (&childev, EV_MAXPRI);
1398 ev_signal_start (EV_A_ &childev); 3441 ev_signal_start (EV_A_ &childev);
1399 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3442 ev_unref (EV_A); /* child watcher should not keep loop alive */
1400#endif 3443#endif
… …
1405 3448
1406 return ev_default_loop_ptr; 3449 return ev_default_loop_ptr;
1407} 3450}
1408 3451
1409void 3452void
1410ev_default_destroy (void) 3453ev_loop_fork (EV_P) EV_NOEXCEPT
1411{ 3454{
1412#if EV_MULTIPLICITY 3455 postfork = 1;
1413 struct ev_loop *loop = ev_default_loop_ptr;
1414#endif
1415
1416#ifndef _WIN32
1417 ev_ref (EV_A); /* child watcher */
1418 ev_signal_stop (EV_A_ &childev);
1419#endif
1420
1421 loop_destroy (EV_A);
1422}
1423
1424void
1425ev_default_fork (void)
1426{
1427#if EV_MULTIPLICITY
1428 struct ev_loop *loop = ev_default_loop_ptr;
1429#endif
1430
1431 if (backend)
1432 postfork = 1; /* must be in line with ev_loop_fork */
1433} 3456}
1434 3457
1435/*****************************************************************************/ 3458/*****************************************************************************/
1436 3459
1437void 3460void
1438ev_invoke (EV_P_ void *w, int revents) 3461ev_invoke (EV_P_ void *w, int revents)
1439{ 3462{
1440 EV_CB_INVOKE ((W)w, revents); 3463 EV_CB_INVOKE ((W)w, revents);
1441} 3464}
1442 3465
1443void inline_speed 3466unsigned int
1444call_pending (EV_P) 3467ev_pending_count (EV_P) EV_NOEXCEPT
1445{ 3468{
1446 int pri; 3469 int pri;
3470 unsigned int count = 0;
1447 3471
1448 for (pri = NUMPRI; pri--; ) 3472 for (pri = NUMPRI; pri--; )
3473 count += pendingcnt [pri];
3474
3475 return count;
3476}
3477
3478ecb_noinline
3479void
3480ev_invoke_pending (EV_P)
3481{
3482 pendingpri = NUMPRI;
3483
3484 do
3485 {
3486 --pendingpri;
3487
3488 /* pendingpri possibly gets modified in the inner loop */
1449 while (pendingcnt [pri]) 3489 while (pendingcnt [pendingpri])
1450 {
1451 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1452
1453 if (expect_true (p->w))
1454 {
1455 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1456
1457 p->w->pending = 0;
1458 EV_CB_INVOKE (p->w, p->events);
1459 }
1460 }
1461}
1462
1463void inline_size
1464timers_reify (EV_P)
1465{
1466 while (timercnt && ev_at (timers [1]) <= mn_now)
1467 {
1468 ev_timer *w = (ev_timer *)timers [1];
1469
1470 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1471
1472 /* first reschedule or stop timer */
1473 if (w->repeat)
1474 { 3490 {
1475 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3491 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1476 3492
1477 ev_at (w) += w->repeat; 3493 p->w->pending = 0;
1478 if (ev_at (w) < mn_now) 3494 EV_CB_INVOKE (p->w, p->events);
1479 ev_at (w) = mn_now; 3495 EV_FREQUENT_CHECK;
1480
1481 downheap (timers, timercnt, 1);
1482 } 3496 }
1483 else
1484 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1485
1486 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1487 }
1488}
1489
1490#if EV_PERIODIC_ENABLE
1491void inline_size
1492periodics_reify (EV_P)
1493{
1494 while (periodiccnt && ev_at (periodics [1]) <= ev_rt_now)
1495 { 3497 }
1496 ev_periodic *w = (ev_periodic *)periodics [1]; 3498 while (pendingpri);
1497
1498 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1499
1500 /* first reschedule or stop timer */
1501 if (w->reschedule_cb)
1502 {
1503 ev_at (w) = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1504 assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) > ev_rt_now));
1505 downheap (periodics, periodiccnt, 1);
1506 }
1507 else if (w->interval)
1508 {
1509 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1510 if (ev_at (w) - ev_rt_now <= TIME_EPSILON) ev_at (w) += w->interval;
1511 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ev_at (w) > ev_rt_now));
1512 downheap (periodics, periodiccnt, 1);
1513 }
1514 else
1515 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1516
1517 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1518 }
1519} 3499}
1520
1521static void noinline
1522periodics_reschedule (EV_P)
1523{
1524 int i;
1525
1526 /* adjust periodics after time jump */
1527 for (i = 0; i < periodiccnt; ++i)
1528 {
1529 ev_periodic *w = (ev_periodic *)periodics [i];
1530
1531 if (w->reschedule_cb)
1532 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1533 else if (w->interval)
1534 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1535 }
1536
1537 /* now rebuild the heap */
1538 for (i = periodiccnt >> 1; i--; )
1539 downheap (periodics, periodiccnt, i);
1540}
1541#endif
1542 3500
1543#if EV_IDLE_ENABLE 3501#if EV_IDLE_ENABLE
1544void inline_size 3502/* make idle watchers pending. this handles the "call-idle */
3503/* only when higher priorities are idle" logic */
3504inline_size void
1545idle_reify (EV_P) 3505idle_reify (EV_P)
1546{ 3506{
1547 if (expect_false (idleall)) 3507 if (ecb_expect_false (idleall))
1548 { 3508 {
1549 int pri; 3509 int pri;
1550 3510
1551 for (pri = NUMPRI; pri--; ) 3511 for (pri = NUMPRI; pri--; )
1552 { 3512 {
… …
1561 } 3521 }
1562 } 3522 }
1563} 3523}
1564#endif 3524#endif
1565 3525
1566void inline_speed 3526/* make timers pending */
3527inline_size void
3528timers_reify (EV_P)
3529{
3530 EV_FREQUENT_CHECK;
3531
3532 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
3533 {
3534 do
3535 {
3536 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
3537
3538 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
3539
3540 /* first reschedule or stop timer */
3541 if (w->repeat)
3542 {
3543 ev_at (w) += w->repeat;
3544 if (ev_at (w) < mn_now)
3545 ev_at (w) = mn_now;
3546
3547 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
3548
3549 ANHE_at_cache (timers [HEAP0]);
3550 downheap (timers, timercnt, HEAP0);
3551 }
3552 else
3553 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
3554
3555 EV_FREQUENT_CHECK;
3556 feed_reverse (EV_A_ (W)w);
3557 }
3558 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
3559
3560 feed_reverse_done (EV_A_ EV_TIMER);
3561 }
3562}
3563
3564#if EV_PERIODIC_ENABLE
3565
3566ecb_noinline
3567static void
3568periodic_recalc (EV_P_ ev_periodic *w)
3569{
3570 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3571 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3572
3573 /* the above almost always errs on the low side */
3574 while (at <= ev_rt_now)
3575 {
3576 ev_tstamp nat = at + w->interval;
3577
3578 /* when resolution fails us, we use ev_rt_now */
3579 if (ecb_expect_false (nat == at))
3580 {
3581 at = ev_rt_now;
3582 break;
3583 }
3584
3585 at = nat;
3586 }
3587
3588 ev_at (w) = at;
3589}
3590
3591/* make periodics pending */
3592inline_size void
3593periodics_reify (EV_P)
3594{
3595 EV_FREQUENT_CHECK;
3596
3597 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
3598 {
3599 do
3600 {
3601 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
3602
3603 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
3604
3605 /* first reschedule or stop timer */
3606 if (w->reschedule_cb)
3607 {
3608 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3609
3610 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
3611
3612 ANHE_at_cache (periodics [HEAP0]);
3613 downheap (periodics, periodiccnt, HEAP0);
3614 }
3615 else if (w->interval)
3616 {
3617 periodic_recalc (EV_A_ w);
3618 ANHE_at_cache (periodics [HEAP0]);
3619 downheap (periodics, periodiccnt, HEAP0);
3620 }
3621 else
3622 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
3623
3624 EV_FREQUENT_CHECK;
3625 feed_reverse (EV_A_ (W)w);
3626 }
3627 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
3628
3629 feed_reverse_done (EV_A_ EV_PERIODIC);
3630 }
3631}
3632
3633/* simply recalculate all periodics */
3634/* TODO: maybe ensure that at least one event happens when jumping forward? */
3635ecb_noinline ecb_cold
3636static void
3637periodics_reschedule (EV_P)
3638{
3639 int i;
3640
3641 /* adjust periodics after time jump */
3642 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
3643 {
3644 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
3645
3646 if (w->reschedule_cb)
3647 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3648 else if (w->interval)
3649 periodic_recalc (EV_A_ w);
3650
3651 ANHE_at_cache (periodics [i]);
3652 }
3653
3654 reheap (periodics, periodiccnt);
3655}
3656#endif
3657
3658/* adjust all timers by a given offset */
3659ecb_noinline ecb_cold
3660static void
3661timers_reschedule (EV_P_ ev_tstamp adjust)
3662{
3663 int i;
3664
3665 for (i = 0; i < timercnt; ++i)
3666 {
3667 ANHE *he = timers + i + HEAP0;
3668 ANHE_w (*he)->at += adjust;
3669 ANHE_at_cache (*he);
3670 }
3671}
3672
3673/* fetch new monotonic and realtime times from the kernel */
3674/* also detect if there was a timejump, and act accordingly */
3675inline_speed void
1567time_update (EV_P_ ev_tstamp max_block) 3676time_update (EV_P_ ev_tstamp max_block)
1568{ 3677{
1569 int i;
1570
1571#if EV_USE_MONOTONIC 3678#if EV_USE_MONOTONIC
1572 if (expect_true (have_monotonic)) 3679 if (ecb_expect_true (have_monotonic))
1573 { 3680 {
3681 int i;
1574 ev_tstamp odiff = rtmn_diff; 3682 ev_tstamp odiff = rtmn_diff;
1575 3683
1576 mn_now = get_clock (); 3684 mn_now = get_clock ();
1577 3685
1578 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3686 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
1579 /* interpolate in the meantime */ 3687 /* interpolate in the meantime */
1580 if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5)) 3688 if (ecb_expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1581 { 3689 {
1582 ev_rt_now = rtmn_diff + mn_now; 3690 ev_rt_now = rtmn_diff + mn_now;
1583 return; 3691 return;
1584 } 3692 }
1585 3693
… …
1594 * doesn't hurt either as we only do this on time-jumps or 3702 * doesn't hurt either as we only do this on time-jumps or
1595 * in the unlikely event of having been preempted here. 3703 * in the unlikely event of having been preempted here.
1596 */ 3704 */
1597 for (i = 4; --i; ) 3705 for (i = 4; --i; )
1598 { 3706 {
3707 ev_tstamp diff;
1599 rtmn_diff = ev_rt_now - mn_now; 3708 rtmn_diff = ev_rt_now - mn_now;
1600 3709
1601 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 3710 diff = odiff - rtmn_diff;
3711
3712 if (ecb_expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1602 return; /* all is well */ 3713 return; /* all is well */
1603 3714
1604 ev_rt_now = ev_time (); 3715 ev_rt_now = ev_time ();
1605 mn_now = get_clock (); 3716 mn_now = get_clock ();
1606 now_floor = mn_now; 3717 now_floor = mn_now;
1607 } 3718 }
1608 3719
3720 /* no timer adjustment, as the monotonic clock doesn't jump */
3721 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1609# if EV_PERIODIC_ENABLE 3722# if EV_PERIODIC_ENABLE
1610 periodics_reschedule (EV_A); 3723 periodics_reschedule (EV_A);
1611# endif 3724# endif
1612 /* no timer adjustment, as the monotonic clock doesn't jump */
1613 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1614 } 3725 }
1615 else 3726 else
1616#endif 3727#endif
1617 { 3728 {
1618 ev_rt_now = ev_time (); 3729 ev_rt_now = ev_time ();
1619 3730
1620 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 3731 if (ecb_expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1621 { 3732 {
3733 /* adjust timers. this is easy, as the offset is the same for all of them */
3734 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1622#if EV_PERIODIC_ENABLE 3735#if EV_PERIODIC_ENABLE
1623 periodics_reschedule (EV_A); 3736 periodics_reschedule (EV_A);
1624#endif 3737#endif
1625 /* adjust timers. this is easy, as the offset is the same for all of them */
1626 for (i = 1; i <= timercnt; ++i)
1627 ev_at (timers [i]) += ev_rt_now - mn_now;
1628 } 3738 }
1629 3739
1630 mn_now = ev_rt_now; 3740 mn_now = ev_rt_now;
1631 } 3741 }
1632} 3742}
1633 3743
1634void 3744int
1635ev_ref (EV_P)
1636{
1637 ++activecnt;
1638}
1639
1640void
1641ev_unref (EV_P)
1642{
1643 --activecnt;
1644}
1645
1646static int loop_done;
1647
1648void
1649ev_loop (EV_P_ int flags) 3745ev_run (EV_P_ int flags)
1650{ 3746{
3747#if EV_FEATURE_API
3748 ++loop_depth;
3749#endif
3750
3751 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3752
1651 loop_done = EVUNLOOP_CANCEL; 3753 loop_done = EVBREAK_CANCEL;
1652 3754
1653 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 3755 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1654 3756
1655 do 3757 do
1656 { 3758 {
3759#if EV_VERIFY >= 2
3760 ev_verify (EV_A);
3761#endif
3762
1657#ifndef _WIN32 3763#ifndef _WIN32
1658 if (expect_false (curpid)) /* penalise the forking check even more */ 3764 if (ecb_expect_false (curpid)) /* penalise the forking check even more */
1659 if (expect_false (getpid () != curpid)) 3765 if (ecb_expect_false (getpid () != curpid))
1660 { 3766 {
1661 curpid = getpid (); 3767 curpid = getpid ();
1662 postfork = 1; 3768 postfork = 1;
1663 } 3769 }
1664#endif 3770#endif
1665 3771
1666#if EV_FORK_ENABLE 3772#if EV_FORK_ENABLE
1667 /* we might have forked, so queue fork handlers */ 3773 /* we might have forked, so queue fork handlers */
1668 if (expect_false (postfork)) 3774 if (ecb_expect_false (postfork))
1669 if (forkcnt) 3775 if (forkcnt)
1670 { 3776 {
1671 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3777 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1672 call_pending (EV_A); 3778 EV_INVOKE_PENDING;
1673 } 3779 }
1674#endif 3780#endif
1675 3781
3782#if EV_PREPARE_ENABLE
1676 /* queue prepare watchers (and execute them) */ 3783 /* queue prepare watchers (and execute them) */
1677 if (expect_false (preparecnt)) 3784 if (ecb_expect_false (preparecnt))
1678 { 3785 {
1679 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3786 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1680 call_pending (EV_A); 3787 EV_INVOKE_PENDING;
1681 } 3788 }
3789#endif
1682 3790
1683 if (expect_false (!activecnt)) 3791 if (ecb_expect_false (loop_done))
1684 break; 3792 break;
1685 3793
1686 /* we might have forked, so reify kernel state if necessary */ 3794 /* we might have forked, so reify kernel state if necessary */
1687 if (expect_false (postfork)) 3795 if (ecb_expect_false (postfork))
1688 loop_fork (EV_A); 3796 loop_fork (EV_A);
1689 3797
1690 /* update fd-related kernel structures */ 3798 /* update fd-related kernel structures */
1691 fd_reify (EV_A); 3799 fd_reify (EV_A);
1692 3800
1693 /* calculate blocking time */ 3801 /* calculate blocking time */
1694 { 3802 {
1695 ev_tstamp waittime = 0.; 3803 ev_tstamp waittime = 0.;
1696 ev_tstamp sleeptime = 0.; 3804 ev_tstamp sleeptime = 0.;
1697 3805
3806 /* remember old timestamp for io_blocktime calculation */
3807 ev_tstamp prev_mn_now = mn_now;
3808
3809 /* update time to cancel out callback processing overhead */
3810 time_update (EV_A_ 1e100);
3811
3812 /* from now on, we want a pipe-wake-up */
3813 pipe_write_wanted = 1;
3814
3815 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3816
1698 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3817 if (ecb_expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1699 { 3818 {
1700 /* update time to cancel out callback processing overhead */
1701 time_update (EV_A_ 1e100);
1702
1703 waittime = MAX_BLOCKTIME; 3819 waittime = MAX_BLOCKTIME;
1704 3820
1705 if (timercnt) 3821 if (timercnt)
1706 { 3822 {
1707 ev_tstamp to = ev_at (timers [1]) - mn_now + backend_fudge; 3823 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1708 if (waittime > to) waittime = to; 3824 if (waittime > to) waittime = to;
1709 } 3825 }
1710 3826
1711#if EV_PERIODIC_ENABLE 3827#if EV_PERIODIC_ENABLE
1712 if (periodiccnt) 3828 if (periodiccnt)
1713 { 3829 {
1714 ev_tstamp to = ev_at (periodics [1]) - ev_rt_now + backend_fudge; 3830 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1715 if (waittime > to) waittime = to; 3831 if (waittime > to) waittime = to;
1716 } 3832 }
1717#endif 3833#endif
1718 3834
3835 /* don't let timeouts decrease the waittime below timeout_blocktime */
1719 if (expect_false (waittime < timeout_blocktime)) 3836 if (ecb_expect_false (waittime < timeout_blocktime))
1720 waittime = timeout_blocktime; 3837 waittime = timeout_blocktime;
1721 3838
1722 sleeptime = waittime - backend_fudge; 3839 /* at this point, we NEED to wait, so we have to ensure */
3840 /* to pass a minimum nonzero value to the backend */
3841 if (ecb_expect_false (waittime < backend_mintime))
3842 waittime = backend_mintime;
1723 3843
3844 /* extra check because io_blocktime is commonly 0 */
1724 if (expect_true (sleeptime > io_blocktime)) 3845 if (ecb_expect_false (io_blocktime))
1725 sleeptime = io_blocktime;
1726
1727 if (sleeptime)
1728 { 3846 {
3847 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3848
3849 if (sleeptime > waittime - backend_mintime)
3850 sleeptime = waittime - backend_mintime;
3851
3852 if (ecb_expect_true (sleeptime > 0.))
3853 {
1729 ev_sleep (sleeptime); 3854 ev_sleep (sleeptime);
1730 waittime -= sleeptime; 3855 waittime -= sleeptime;
3856 }
1731 } 3857 }
1732 } 3858 }
1733 3859
3860#if EV_FEATURE_API
1734 ++loop_count; 3861 ++loop_count;
3862#endif
3863 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1735 backend_poll (EV_A_ waittime); 3864 backend_poll (EV_A_ waittime);
3865 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3866
3867 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3868
3869 ECB_MEMORY_FENCE_ACQUIRE;
3870 if (pipe_write_skipped)
3871 {
3872 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3873 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3874 }
1736 3875
1737 /* update ev_rt_now, do magic */ 3876 /* update ev_rt_now, do magic */
1738 time_update (EV_A_ waittime + sleeptime); 3877 time_update (EV_A_ waittime + sleeptime);
1739 } 3878 }
1740 3879
… …
1747#if EV_IDLE_ENABLE 3886#if EV_IDLE_ENABLE
1748 /* queue idle watchers unless other events are pending */ 3887 /* queue idle watchers unless other events are pending */
1749 idle_reify (EV_A); 3888 idle_reify (EV_A);
1750#endif 3889#endif
1751 3890
3891#if EV_CHECK_ENABLE
1752 /* queue check watchers, to be executed first */ 3892 /* queue check watchers, to be executed first */
1753 if (expect_false (checkcnt)) 3893 if (ecb_expect_false (checkcnt))
1754 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3894 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3895#endif
1755 3896
1756 call_pending (EV_A); 3897 EV_INVOKE_PENDING;
1757 } 3898 }
1758 while (expect_true ( 3899 while (ecb_expect_true (
1759 activecnt 3900 activecnt
1760 && !loop_done 3901 && !loop_done
1761 && !(flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)) 3902 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
1762 )); 3903 ));
1763 3904
1764 if (loop_done == EVUNLOOP_ONE) 3905 if (loop_done == EVBREAK_ONE)
1765 loop_done = EVUNLOOP_CANCEL; 3906 loop_done = EVBREAK_CANCEL;
1766}
1767 3907
3908#if EV_FEATURE_API
3909 --loop_depth;
3910#endif
3911
3912 return activecnt;
3913}
3914
1768void 3915void
1769ev_unloop (EV_P_ int how) 3916ev_break (EV_P_ int how) EV_NOEXCEPT
1770{ 3917{
1771 loop_done = how; 3918 loop_done = how;
1772} 3919}
1773 3920
3921void
3922ev_ref (EV_P) EV_NOEXCEPT
3923{
3924 ++activecnt;
3925}
3926
3927void
3928ev_unref (EV_P) EV_NOEXCEPT
3929{
3930 --activecnt;
3931}
3932
3933void
3934ev_now_update (EV_P) EV_NOEXCEPT
3935{
3936 time_update (EV_A_ 1e100);
3937}
3938
3939void
3940ev_suspend (EV_P) EV_NOEXCEPT
3941{
3942 ev_now_update (EV_A);
3943}
3944
3945void
3946ev_resume (EV_P) EV_NOEXCEPT
3947{
3948 ev_tstamp mn_prev = mn_now;
3949
3950 ev_now_update (EV_A);
3951 timers_reschedule (EV_A_ mn_now - mn_prev);
3952#if EV_PERIODIC_ENABLE
3953 /* TODO: really do this? */
3954 periodics_reschedule (EV_A);
3955#endif
3956}
3957
1774/*****************************************************************************/ 3958/*****************************************************************************/
3959/* singly-linked list management, used when the expected list length is short */
1775 3960
1776void inline_size 3961inline_size void
1777wlist_add (WL *head, WL elem) 3962wlist_add (WL *head, WL elem)
1778{ 3963{
1779 elem->next = *head; 3964 elem->next = *head;
1780 *head = elem; 3965 *head = elem;
1781} 3966}
1782 3967
1783void inline_size 3968inline_size void
1784wlist_del (WL *head, WL elem) 3969wlist_del (WL *head, WL elem)
1785{ 3970{
1786 while (*head) 3971 while (*head)
1787 { 3972 {
1788 if (*head == elem) 3973 if (ecb_expect_true (*head == elem))
1789 { 3974 {
1790 *head = elem->next; 3975 *head = elem->next;
1791 return; 3976 break;
1792 } 3977 }
1793 3978
1794 head = &(*head)->next; 3979 head = &(*head)->next;
1795 } 3980 }
1796} 3981}
1797 3982
1798void inline_speed 3983/* internal, faster, version of ev_clear_pending */
3984inline_speed void
1799clear_pending (EV_P_ W w) 3985clear_pending (EV_P_ W w)
1800{ 3986{
1801 if (w->pending) 3987 if (w->pending)
1802 { 3988 {
1803 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3989 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1804 w->pending = 0; 3990 w->pending = 0;
1805 } 3991 }
1806} 3992}
1807 3993
1808int 3994int
1809ev_clear_pending (EV_P_ void *w) 3995ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
1810{ 3996{
1811 W w_ = (W)w; 3997 W w_ = (W)w;
1812 int pending = w_->pending; 3998 int pending = w_->pending;
1813 3999
1814 if (expect_true (pending)) 4000 if (ecb_expect_true (pending))
1815 { 4001 {
1816 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 4002 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
4003 p->w = (W)&pending_w;
1817 w_->pending = 0; 4004 w_->pending = 0;
1818 p->w = 0;
1819 return p->events; 4005 return p->events;
1820 } 4006 }
1821 else 4007 else
1822 return 0; 4008 return 0;
1823} 4009}
1824 4010
1825void inline_size 4011inline_size void
1826pri_adjust (EV_P_ W w) 4012pri_adjust (EV_P_ W w)
1827{ 4013{
1828 int pri = w->priority; 4014 int pri = ev_priority (w);
1829 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 4015 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1830 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 4016 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1831 w->priority = pri; 4017 ev_set_priority (w, pri);
1832} 4018}
1833 4019
1834void inline_speed 4020inline_speed void
1835ev_start (EV_P_ W w, int active) 4021ev_start (EV_P_ W w, int active)
1836{ 4022{
1837 pri_adjust (EV_A_ w); 4023 pri_adjust (EV_A_ w);
1838 w->active = active; 4024 w->active = active;
1839 ev_ref (EV_A); 4025 ev_ref (EV_A);
1840} 4026}
1841 4027
1842void inline_size 4028inline_size void
1843ev_stop (EV_P_ W w) 4029ev_stop (EV_P_ W w)
1844{ 4030{
1845 ev_unref (EV_A); 4031 ev_unref (EV_A);
1846 w->active = 0; 4032 w->active = 0;
1847} 4033}
1848 4034
1849/*****************************************************************************/ 4035/*****************************************************************************/
1850 4036
1851void noinline 4037ecb_noinline
4038void
1852ev_io_start (EV_P_ ev_io *w) 4039ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
1853{ 4040{
1854 int fd = w->fd; 4041 int fd = w->fd;
1855 4042
1856 if (expect_false (ev_is_active (w))) 4043 if (ecb_expect_false (ev_is_active (w)))
1857 return; 4044 return;
1858 4045
1859 assert (("ev_io_start called with negative fd", fd >= 0)); 4046 assert (("libev: ev_io_start called with negative fd", fd >= 0));
4047 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
4048
4049#if EV_VERIFY >= 2
4050 assert (("libev: ev_io_start called on watcher with invalid fd", fd_valid (fd)));
4051#endif
4052 EV_FREQUENT_CHECK;
1860 4053
1861 ev_start (EV_A_ (W)w, 1); 4054 ev_start (EV_A_ (W)w, 1);
1862 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 4055 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
1863 wlist_add (&anfds[fd].head, (WL)w); 4056 wlist_add (&anfds[fd].head, (WL)w);
1864 4057
4058 /* common bug, apparently */
4059 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
4060
1865 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 4061 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1866 w->events &= ~EV_IOFDSET; 4062 w->events &= ~EV__IOFDSET;
1867}
1868 4063
1869void noinline 4064 EV_FREQUENT_CHECK;
4065}
4066
4067ecb_noinline
4068void
1870ev_io_stop (EV_P_ ev_io *w) 4069ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
1871{ 4070{
1872 clear_pending (EV_A_ (W)w); 4071 clear_pending (EV_A_ (W)w);
1873 if (expect_false (!ev_is_active (w))) 4072 if (ecb_expect_false (!ev_is_active (w)))
1874 return; 4073 return;
1875 4074
1876 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 4075 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
4076
4077#if EV_VERIFY >= 2
4078 assert (("libev: ev_io_stop called on watcher with invalid fd", fd_valid (w->fd)));
4079#endif
4080 EV_FREQUENT_CHECK;
1877 4081
1878 wlist_del (&anfds[w->fd].head, (WL)w); 4082 wlist_del (&anfds[w->fd].head, (WL)w);
1879 ev_stop (EV_A_ (W)w); 4083 ev_stop (EV_A_ (W)w);
1880 4084
1881 fd_change (EV_A_ w->fd, 1); 4085 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1882}
1883 4086
1884void noinline 4087 EV_FREQUENT_CHECK;
4088}
4089
4090ecb_noinline
4091void
1885ev_timer_start (EV_P_ ev_timer *w) 4092ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
1886{ 4093{
1887 if (expect_false (ev_is_active (w))) 4094 if (ecb_expect_false (ev_is_active (w)))
1888 return; 4095 return;
1889 4096
1890 ev_at (w) += mn_now; 4097 ev_at (w) += mn_now;
1891 4098
1892 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 4099 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1893 4100
4101 EV_FREQUENT_CHECK;
4102
4103 ++timercnt;
1894 ev_start (EV_A_ (W)w, ++timercnt); 4104 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1895 array_needsize (WT, timers, timermax, timercnt + 1, EMPTY2); 4105 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
1896 timers [timercnt] = (WT)w; 4106 ANHE_w (timers [ev_active (w)]) = (WT)w;
4107 ANHE_at_cache (timers [ev_active (w)]);
1897 upheap (timers, timercnt); 4108 upheap (timers, ev_active (w));
1898 4109
4110 EV_FREQUENT_CHECK;
4111
1899 /*assert (("internal timer heap corruption", timers [((W)w)->active] == w));*/ 4112 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1900} 4113}
1901 4114
1902void noinline 4115ecb_noinline
4116void
1903ev_timer_stop (EV_P_ ev_timer *w) 4117ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
1904{ 4118{
1905 clear_pending (EV_A_ (W)w); 4119 clear_pending (EV_A_ (W)w);
1906 if (expect_false (!ev_is_active (w))) 4120 if (ecb_expect_false (!ev_is_active (w)))
1907 return; 4121 return;
1908 4122
1909 assert (("internal timer heap corruption", timers [((W)w)->active] == (WT)w)); 4123 EV_FREQUENT_CHECK;
1910 4124
1911 { 4125 {
1912 int active = ((W)w)->active; 4126 int active = ev_active (w);
1913 4127
4128 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
4129
4130 --timercnt;
4131
1914 if (expect_true (active < timercnt)) 4132 if (ecb_expect_true (active < timercnt + HEAP0))
1915 { 4133 {
1916 timers [active] = timers [timercnt]; 4134 timers [active] = timers [timercnt + HEAP0];
1917 adjustheap (timers, timercnt, active); 4135 adjustheap (timers, timercnt, active);
1918 } 4136 }
1919
1920 --timercnt;
1921 } 4137 }
1922 4138
1923 ev_at (w) -= mn_now; 4139 ev_at (w) -= mn_now;
1924 4140
1925 ev_stop (EV_A_ (W)w); 4141 ev_stop (EV_A_ (W)w);
1926}
1927 4142
1928void noinline 4143 EV_FREQUENT_CHECK;
4144}
4145
4146ecb_noinline
4147void
1929ev_timer_again (EV_P_ ev_timer *w) 4148ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
1930{ 4149{
4150 EV_FREQUENT_CHECK;
4151
4152 clear_pending (EV_A_ (W)w);
4153
1931 if (ev_is_active (w)) 4154 if (ev_is_active (w))
1932 { 4155 {
1933 if (w->repeat) 4156 if (w->repeat)
1934 { 4157 {
1935 ev_at (w) = mn_now + w->repeat; 4158 ev_at (w) = mn_now + w->repeat;
4159 ANHE_at_cache (timers [ev_active (w)]);
1936 adjustheap (timers, timercnt, ((W)w)->active); 4160 adjustheap (timers, timercnt, ev_active (w));
1937 } 4161 }
1938 else 4162 else
1939 ev_timer_stop (EV_A_ w); 4163 ev_timer_stop (EV_A_ w);
1940 } 4164 }
1941 else if (w->repeat) 4165 else if (w->repeat)
1942 { 4166 {
1943 w->at = w->repeat; 4167 ev_at (w) = w->repeat;
1944 ev_timer_start (EV_A_ w); 4168 ev_timer_start (EV_A_ w);
1945 } 4169 }
4170
4171 EV_FREQUENT_CHECK;
4172}
4173
4174ev_tstamp
4175ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
4176{
4177 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1946} 4178}
1947 4179
1948#if EV_PERIODIC_ENABLE 4180#if EV_PERIODIC_ENABLE
1949void noinline 4181ecb_noinline
4182void
1950ev_periodic_start (EV_P_ ev_periodic *w) 4183ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
1951{ 4184{
1952 if (expect_false (ev_is_active (w))) 4185 if (ecb_expect_false (ev_is_active (w)))
1953 return; 4186 return;
1954 4187
1955 if (w->reschedule_cb) 4188 if (w->reschedule_cb)
1956 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4189 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1957 else if (w->interval) 4190 else if (w->interval)
1958 { 4191 {
1959 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 4192 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1960 /* this formula differs from the one in periodic_reify because we do not always round up */ 4193 periodic_recalc (EV_A_ w);
1961 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1962 } 4194 }
1963 else 4195 else
1964 ev_at (w) = w->offset; 4196 ev_at (w) = w->offset;
1965 4197
4198 EV_FREQUENT_CHECK;
4199
4200 ++periodiccnt;
1966 ev_start (EV_A_ (W)w, ++periodiccnt); 4201 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1967 array_needsize (WT, periodics, periodicmax, periodiccnt + 1, EMPTY2); 4202 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
1968 periodics [periodiccnt] = (WT)w; 4203 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1969 upheap (periodics, periodiccnt); 4204 ANHE_at_cache (periodics [ev_active (w)]);
4205 upheap (periodics, ev_active (w));
1970 4206
4207 EV_FREQUENT_CHECK;
4208
1971 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 4209 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1972} 4210}
1973 4211
1974void noinline 4212ecb_noinline
4213void
1975ev_periodic_stop (EV_P_ ev_periodic *w) 4214ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
1976{ 4215{
1977 clear_pending (EV_A_ (W)w); 4216 clear_pending (EV_A_ (W)w);
1978 if (expect_false (!ev_is_active (w))) 4217 if (ecb_expect_false (!ev_is_active (w)))
1979 return; 4218 return;
1980 4219
1981 assert (("internal periodic heap corruption", periodics [((W)w)->active] == (WT)w)); 4220 EV_FREQUENT_CHECK;
1982 4221
1983 { 4222 {
1984 int active = ((W)w)->active; 4223 int active = ev_active (w);
1985 4224
4225 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
4226
4227 --periodiccnt;
4228
1986 if (expect_true (active < periodiccnt)) 4229 if (ecb_expect_true (active < periodiccnt + HEAP0))
1987 { 4230 {
1988 periodics [active] = periodics [periodiccnt]; 4231 periodics [active] = periodics [periodiccnt + HEAP0];
1989 adjustheap (periodics, periodiccnt, active); 4232 adjustheap (periodics, periodiccnt, active);
1990 } 4233 }
1991
1992 --periodiccnt;
1993 } 4234 }
1994 4235
1995 ev_stop (EV_A_ (W)w); 4236 ev_stop (EV_A_ (W)w);
1996}
1997 4237
1998void noinline 4238 EV_FREQUENT_CHECK;
4239}
4240
4241ecb_noinline
4242void
1999ev_periodic_again (EV_P_ ev_periodic *w) 4243ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2000{ 4244{
2001 /* TODO: use adjustheap and recalculation */ 4245 /* TODO: use adjustheap and recalculation */
2002 ev_periodic_stop (EV_A_ w); 4246 ev_periodic_stop (EV_A_ w);
2003 ev_periodic_start (EV_A_ w); 4247 ev_periodic_start (EV_A_ w);
2004} 4248}
… …
2006 4250
2007#ifndef SA_RESTART 4251#ifndef SA_RESTART
2008# define SA_RESTART 0 4252# define SA_RESTART 0
2009#endif 4253#endif
2010 4254
2011void noinline 4255#if EV_SIGNAL_ENABLE
4256
4257ecb_noinline
4258void
2012ev_signal_start (EV_P_ ev_signal *w) 4259ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2013{ 4260{
4261 if (ecb_expect_false (ev_is_active (w)))
4262 return;
4263
4264 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
4265
2014#if EV_MULTIPLICITY 4266#if EV_MULTIPLICITY
2015 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4267 assert (("libev: a signal must not be attached to two different loops",
2016#endif 4268 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2017 if (expect_false (ev_is_active (w)))
2018 return;
2019 4269
2020 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 4270 signals [w->signum - 1].loop = EV_A;
4271 ECB_MEMORY_FENCE_RELEASE;
4272#endif
2021 4273
2022 evpipe_init (EV_A); 4274 EV_FREQUENT_CHECK;
2023 4275
4276#if EV_USE_SIGNALFD
4277 if (sigfd == -2)
2024 { 4278 {
2025#ifndef _WIN32 4279 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
2026 sigset_t full, prev; 4280 if (sigfd < 0 && errno == EINVAL)
2027 sigfillset (&full); 4281 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
2028 sigprocmask (SIG_SETMASK, &full, &prev);
2029#endif
2030 4282
2031 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 4283 if (sigfd >= 0)
4284 {
4285 fd_intern (sigfd); /* doing it twice will not hurt */
2032 4286
2033#ifndef _WIN32 4287 sigemptyset (&sigfd_set);
2034 sigprocmask (SIG_SETMASK, &prev, 0); 4288
2035#endif 4289 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
4290 ev_set_priority (&sigfd_w, EV_MAXPRI);
4291 ev_io_start (EV_A_ &sigfd_w);
4292 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
4293 }
2036 } 4294 }
4295
4296 if (sigfd >= 0)
4297 {
4298 /* TODO: check .head */
4299 sigaddset (&sigfd_set, w->signum);
4300 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
4301
4302 signalfd (sigfd, &sigfd_set, 0);
4303 }
4304#endif
2037 4305
2038 ev_start (EV_A_ (W)w, 1); 4306 ev_start (EV_A_ (W)w, 1);
2039 wlist_add (&signals [w->signum - 1].head, (WL)w); 4307 wlist_add (&signals [w->signum - 1].head, (WL)w);
2040 4308
2041 if (!((WL)w)->next) 4309 if (!((WL)w)->next)
4310# if EV_USE_SIGNALFD
4311 if (sigfd < 0) /*TODO*/
4312# endif
2042 { 4313 {
2043#if _WIN32 4314# ifdef _WIN32
4315 evpipe_init (EV_A);
4316
2044 signal (w->signum, ev_sighandler); 4317 signal (w->signum, ev_sighandler);
2045#else 4318# else
2046 struct sigaction sa; 4319 struct sigaction sa;
4320
4321 evpipe_init (EV_A);
4322
2047 sa.sa_handler = ev_sighandler; 4323 sa.sa_handler = ev_sighandler;
2048 sigfillset (&sa.sa_mask); 4324 sigfillset (&sa.sa_mask);
2049 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4325 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2050 sigaction (w->signum, &sa, 0); 4326 sigaction (w->signum, &sa, 0);
4327
4328 if (origflags & EVFLAG_NOSIGMASK)
4329 {
4330 sigemptyset (&sa.sa_mask);
4331 sigaddset (&sa.sa_mask, w->signum);
4332 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4333 }
2051#endif 4334#endif
2052 } 4335 }
2053}
2054 4336
2055void noinline 4337 EV_FREQUENT_CHECK;
4338}
4339
4340ecb_noinline
4341void
2056ev_signal_stop (EV_P_ ev_signal *w) 4342ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
2057{ 4343{
2058 clear_pending (EV_A_ (W)w); 4344 clear_pending (EV_A_ (W)w);
2059 if (expect_false (!ev_is_active (w))) 4345 if (ecb_expect_false (!ev_is_active (w)))
2060 return; 4346 return;
4347
4348 EV_FREQUENT_CHECK;
2061 4349
2062 wlist_del (&signals [w->signum - 1].head, (WL)w); 4350 wlist_del (&signals [w->signum - 1].head, (WL)w);
2063 ev_stop (EV_A_ (W)w); 4351 ev_stop (EV_A_ (W)w);
2064 4352
2065 if (!signals [w->signum - 1].head) 4353 if (!signals [w->signum - 1].head)
2066 signal (w->signum, SIG_DFL); 4354 {
2067}
2068
2069void
2070ev_child_start (EV_P_ ev_child *w)
2071{
2072#if EV_MULTIPLICITY 4355#if EV_MULTIPLICITY
4356 signals [w->signum - 1].loop = 0; /* unattach from signal */
4357#endif
4358#if EV_USE_SIGNALFD
4359 if (sigfd >= 0)
4360 {
4361 sigset_t ss;
4362
4363 sigemptyset (&ss);
4364 sigaddset (&ss, w->signum);
4365 sigdelset (&sigfd_set, w->signum);
4366
4367 signalfd (sigfd, &sigfd_set, 0);
4368 sigprocmask (SIG_UNBLOCK, &ss, 0);
4369 }
4370 else
4371#endif
4372 signal (w->signum, SIG_DFL);
4373 }
4374
4375 EV_FREQUENT_CHECK;
4376}
4377
4378#endif
4379
4380#if EV_CHILD_ENABLE
4381
4382void
4383ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
4384{
4385#if EV_MULTIPLICITY
2073 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4386 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2074#endif 4387#endif
2075 if (expect_false (ev_is_active (w))) 4388 if (ecb_expect_false (ev_is_active (w)))
2076 return; 4389 return;
2077 4390
4391 EV_FREQUENT_CHECK;
4392
2078 ev_start (EV_A_ (W)w, 1); 4393 ev_start (EV_A_ (W)w, 1);
2079 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4394 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2080}
2081 4395
4396 EV_FREQUENT_CHECK;
4397}
4398
2082void 4399void
2083ev_child_stop (EV_P_ ev_child *w) 4400ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
2084{ 4401{
2085 clear_pending (EV_A_ (W)w); 4402 clear_pending (EV_A_ (W)w);
2086 if (expect_false (!ev_is_active (w))) 4403 if (ecb_expect_false (!ev_is_active (w)))
2087 return; 4404 return;
2088 4405
4406 EV_FREQUENT_CHECK;
4407
2089 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4408 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
2090 ev_stop (EV_A_ (W)w); 4409 ev_stop (EV_A_ (W)w);
4410
4411 EV_FREQUENT_CHECK;
2091} 4412}
4413
4414#endif
2092 4415
2093#if EV_STAT_ENABLE 4416#if EV_STAT_ENABLE
2094 4417
2095# ifdef _WIN32 4418# ifdef _WIN32
2096# undef lstat 4419# undef lstat
2097# define lstat(a,b) _stati64 (a,b) 4420# define lstat(a,b) _stati64 (a,b)
2098# endif 4421# endif
2099 4422
2100#define DEF_STAT_INTERVAL 5.0074891 4423#define DEF_STAT_INTERVAL 5.0074891
4424#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2101#define MIN_STAT_INTERVAL 0.1074891 4425#define MIN_STAT_INTERVAL 0.1074891
2102 4426
2103static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4427ecb_noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2104 4428
2105#if EV_USE_INOTIFY 4429#if EV_USE_INOTIFY
2106# define EV_INOTIFY_BUFSIZE 8192
2107 4430
2108static void noinline 4431/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
4432# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
4433
4434ecb_noinline
4435static void
2109infy_add (EV_P_ ev_stat *w) 4436infy_add (EV_P_ ev_stat *w)
2110{ 4437{
2111 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); 4438 w->wd = inotify_add_watch (fs_fd, w->path,
4439 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4440 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4441 | IN_DONT_FOLLOW | IN_MASK_ADD);
2112 4442
2113 if (w->wd < 0) 4443 if (w->wd >= 0)
4444 {
4445 struct statfs sfs;
4446
4447 /* now local changes will be tracked by inotify, but remote changes won't */
4448 /* unless the filesystem is known to be local, we therefore still poll */
4449 /* also do poll on <2.6.25, but with normal frequency */
4450
4451 if (!fs_2625)
4452 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4453 else if (!statfs (w->path, &sfs)
4454 && (sfs.f_type == 0x1373 /* devfs */
4455 || sfs.f_type == 0x4006 /* fat */
4456 || sfs.f_type == 0x4d44 /* msdos */
4457 || sfs.f_type == 0xEF53 /* ext2/3 */
4458 || sfs.f_type == 0x72b6 /* jffs2 */
4459 || sfs.f_type == 0x858458f6 /* ramfs */
4460 || sfs.f_type == 0x5346544e /* ntfs */
4461 || sfs.f_type == 0x3153464a /* jfs */
4462 || sfs.f_type == 0x9123683e /* btrfs */
4463 || sfs.f_type == 0x52654973 /* reiser3 */
4464 || sfs.f_type == 0x01021994 /* tmpfs */
4465 || sfs.f_type == 0x58465342 /* xfs */))
4466 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4467 else
4468 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2114 { 4469 }
2115 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 4470 else
4471 {
4472 /* can't use inotify, continue to stat */
4473 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2116 4474
2117 /* monitor some parent directory for speedup hints */ 4475 /* if path is not there, monitor some parent directory for speedup hints */
4476 /* note that exceeding the hardcoded path limit is not a correctness issue, */
4477 /* but an efficiency issue only */
2118 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 4478 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
2119 { 4479 {
2120 char path [4096]; 4480 char path [4096];
2121 strcpy (path, w->path); 4481 strcpy (path, w->path);
2122 4482
… …
2125 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 4485 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
2126 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 4486 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
2127 4487
2128 char *pend = strrchr (path, '/'); 4488 char *pend = strrchr (path, '/');
2129 4489
2130 if (!pend) 4490 if (!pend || pend == path)
2131 break; /* whoops, no '/', complain to your admin */ 4491 break;
2132 4492
2133 *pend = 0; 4493 *pend = 0;
2134 w->wd = inotify_add_watch (fs_fd, path, mask); 4494 w->wd = inotify_add_watch (fs_fd, path, mask);
2135 } 4495 }
2136 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4496 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2137 } 4497 }
2138 } 4498 }
2139 else
2140 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
2141 4499
2142 if (w->wd >= 0) 4500 if (w->wd >= 0)
2143 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4501 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2144}
2145 4502
2146static void noinline 4503 /* now re-arm timer, if required */
4504 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4505 ev_timer_again (EV_A_ &w->timer);
4506 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4507}
4508
4509ecb_noinline
4510static void
2147infy_del (EV_P_ ev_stat *w) 4511infy_del (EV_P_ ev_stat *w)
2148{ 4512{
2149 int slot; 4513 int slot;
2150 int wd = w->wd; 4514 int wd = w->wd;
2151 4515
2152 if (wd < 0) 4516 if (wd < 0)
2153 return; 4517 return;
2154 4518
2155 w->wd = -2; 4519 w->wd = -2;
2156 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 4520 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
2157 wlist_del (&fs_hash [slot].head, (WL)w); 4521 wlist_del (&fs_hash [slot].head, (WL)w);
2158 4522
2159 /* remove this watcher, if others are watching it, they will rearm */ 4523 /* remove this watcher, if others are watching it, they will rearm */
2160 inotify_rm_watch (fs_fd, wd); 4524 inotify_rm_watch (fs_fd, wd);
2161} 4525}
2162 4526
2163static void noinline 4527ecb_noinline
4528static void
2164infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4529infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2165{ 4530{
2166 if (slot < 0) 4531 if (slot < 0)
2167 /* overflow, need to check for all hahs slots */ 4532 /* overflow, need to check for all hash slots */
2168 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4533 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2169 infy_wd (EV_A_ slot, wd, ev); 4534 infy_wd (EV_A_ slot, wd, ev);
2170 else 4535 else
2171 { 4536 {
2172 WL w_; 4537 WL w_;
2173 4538
2174 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 4539 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2175 { 4540 {
2176 ev_stat *w = (ev_stat *)w_; 4541 ev_stat *w = (ev_stat *)w_;
2177 w_ = w_->next; /* lets us remove this watcher and all before it */ 4542 w_ = w_->next; /* lets us remove this watcher and all before it */
2178 4543
2179 if (w->wd == wd || wd == -1) 4544 if (w->wd == wd || wd == -1)
2180 { 4545 {
2181 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 4546 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2182 { 4547 {
4548 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2183 w->wd = -1; 4549 w->wd = -1;
2184 infy_add (EV_A_ w); /* re-add, no matter what */ 4550 infy_add (EV_A_ w); /* re-add, no matter what */
2185 } 4551 }
2186 4552
2187 stat_timer_cb (EV_A_ &w->timer, 0); 4553 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2192 4558
2193static void 4559static void
2194infy_cb (EV_P_ ev_io *w, int revents) 4560infy_cb (EV_P_ ev_io *w, int revents)
2195{ 4561{
2196 char buf [EV_INOTIFY_BUFSIZE]; 4562 char buf [EV_INOTIFY_BUFSIZE];
2197 struct inotify_event *ev = (struct inotify_event *)buf;
2198 int ofs; 4563 int ofs;
2199 int len = read (fs_fd, buf, sizeof (buf)); 4564 int len = read (fs_fd, buf, sizeof (buf));
2200 4565
2201 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 4566 for (ofs = 0; ofs < len; )
4567 {
4568 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2202 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4569 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4570 ofs += sizeof (struct inotify_event) + ev->len;
4571 }
2203} 4572}
2204 4573
2205void inline_size 4574inline_size ecb_cold
4575void
4576ev_check_2625 (EV_P)
4577{
4578 /* kernels < 2.6.25 are borked
4579 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4580 */
4581 if (ev_linux_version () < 0x020619)
4582 return;
4583
4584 fs_2625 = 1;
4585}
4586
4587inline_size int
4588infy_newfd (void)
4589{
4590#if defined IN_CLOEXEC && defined IN_NONBLOCK
4591 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4592 if (fd >= 0)
4593 return fd;
4594#endif
4595 return inotify_init ();
4596}
4597
4598inline_size void
2206infy_init (EV_P) 4599infy_init (EV_P)
2207{ 4600{
2208 if (fs_fd != -2) 4601 if (fs_fd != -2)
2209 return; 4602 return;
2210 4603
4604 fs_fd = -1;
4605
4606 ev_check_2625 (EV_A);
4607
2211 fs_fd = inotify_init (); 4608 fs_fd = infy_newfd ();
2212 4609
2213 if (fs_fd >= 0) 4610 if (fs_fd >= 0)
2214 { 4611 {
4612 fd_intern (fs_fd);
2215 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 4613 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2216 ev_set_priority (&fs_w, EV_MAXPRI); 4614 ev_set_priority (&fs_w, EV_MAXPRI);
2217 ev_io_start (EV_A_ &fs_w); 4615 ev_io_start (EV_A_ &fs_w);
4616 ev_unref (EV_A);
2218 } 4617 }
2219} 4618}
2220 4619
2221void inline_size 4620inline_size void
2222infy_fork (EV_P) 4621infy_fork (EV_P)
2223{ 4622{
2224 int slot; 4623 int slot;
2225 4624
2226 if (fs_fd < 0) 4625 if (fs_fd < 0)
2227 return; 4626 return;
2228 4627
4628 ev_ref (EV_A);
4629 ev_io_stop (EV_A_ &fs_w);
2229 close (fs_fd); 4630 close (fs_fd);
2230 fs_fd = inotify_init (); 4631 fs_fd = infy_newfd ();
2231 4632
4633 if (fs_fd >= 0)
4634 {
4635 fd_intern (fs_fd);
4636 ev_io_set (&fs_w, fs_fd, EV_READ);
4637 ev_io_start (EV_A_ &fs_w);
4638 ev_unref (EV_A);
4639 }
4640
2232 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4641 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2233 { 4642 {
2234 WL w_ = fs_hash [slot].head; 4643 WL w_ = fs_hash [slot].head;
2235 fs_hash [slot].head = 0; 4644 fs_hash [slot].head = 0;
2236 4645
2237 while (w_) 4646 while (w_)
… …
2242 w->wd = -1; 4651 w->wd = -1;
2243 4652
2244 if (fs_fd >= 0) 4653 if (fs_fd >= 0)
2245 infy_add (EV_A_ w); /* re-add, no matter what */ 4654 infy_add (EV_A_ w); /* re-add, no matter what */
2246 else 4655 else
4656 {
4657 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4658 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2247 ev_timer_start (EV_A_ &w->timer); 4659 ev_timer_again (EV_A_ &w->timer);
4660 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4661 }
2248 } 4662 }
2249
2250 } 4663 }
2251} 4664}
2252 4665
2253#endif 4666#endif
2254 4667
4668#ifdef _WIN32
4669# define EV_LSTAT(p,b) _stati64 (p, b)
4670#else
4671# define EV_LSTAT(p,b) lstat (p, b)
4672#endif
4673
2255void 4674void
2256ev_stat_stat (EV_P_ ev_stat *w) 4675ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
2257{ 4676{
2258 if (lstat (w->path, &w->attr) < 0) 4677 if (lstat (w->path, &w->attr) < 0)
2259 w->attr.st_nlink = 0; 4678 w->attr.st_nlink = 0;
2260 else if (!w->attr.st_nlink) 4679 else if (!w->attr.st_nlink)
2261 w->attr.st_nlink = 1; 4680 w->attr.st_nlink = 1;
2262} 4681}
2263 4682
2264static void noinline 4683ecb_noinline
4684static void
2265stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4685stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2266{ 4686{
2267 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4687 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2268 4688
2269 /* we copy this here each the time so that */ 4689 ev_statdata prev = w->attr;
2270 /* prev has the old value when the callback gets invoked */
2271 w->prev = w->attr;
2272 ev_stat_stat (EV_A_ w); 4690 ev_stat_stat (EV_A_ w);
2273 4691
2274 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 4692 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2275 if ( 4693 if (
2276 w->prev.st_dev != w->attr.st_dev 4694 prev.st_dev != w->attr.st_dev
2277 || w->prev.st_ino != w->attr.st_ino 4695 || prev.st_ino != w->attr.st_ino
2278 || w->prev.st_mode != w->attr.st_mode 4696 || prev.st_mode != w->attr.st_mode
2279 || w->prev.st_nlink != w->attr.st_nlink 4697 || prev.st_nlink != w->attr.st_nlink
2280 || w->prev.st_uid != w->attr.st_uid 4698 || prev.st_uid != w->attr.st_uid
2281 || w->prev.st_gid != w->attr.st_gid 4699 || prev.st_gid != w->attr.st_gid
2282 || w->prev.st_rdev != w->attr.st_rdev 4700 || prev.st_rdev != w->attr.st_rdev
2283 || w->prev.st_size != w->attr.st_size 4701 || prev.st_size != w->attr.st_size
2284 || w->prev.st_atime != w->attr.st_atime 4702 || prev.st_atime != w->attr.st_atime
2285 || w->prev.st_mtime != w->attr.st_mtime 4703 || prev.st_mtime != w->attr.st_mtime
2286 || w->prev.st_ctime != w->attr.st_ctime 4704 || prev.st_ctime != w->attr.st_ctime
2287 ) { 4705 ) {
4706 /* we only update w->prev on actual differences */
4707 /* in case we test more often than invoke the callback, */
4708 /* to ensure that prev is always different to attr */
4709 w->prev = prev;
4710
2288 #if EV_USE_INOTIFY 4711 #if EV_USE_INOTIFY
4712 if (fs_fd >= 0)
4713 {
2289 infy_del (EV_A_ w); 4714 infy_del (EV_A_ w);
2290 infy_add (EV_A_ w); 4715 infy_add (EV_A_ w);
2291 ev_stat_stat (EV_A_ w); /* avoid race... */ 4716 ev_stat_stat (EV_A_ w); /* avoid race... */
4717 }
2292 #endif 4718 #endif
2293 4719
2294 ev_feed_event (EV_A_ w, EV_STAT); 4720 ev_feed_event (EV_A_ w, EV_STAT);
2295 } 4721 }
2296} 4722}
2297 4723
2298void 4724void
2299ev_stat_start (EV_P_ ev_stat *w) 4725ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
2300{ 4726{
2301 if (expect_false (ev_is_active (w))) 4727 if (ecb_expect_false (ev_is_active (w)))
2302 return; 4728 return;
2303 4729
2304 /* since we use memcmp, we need to clear any padding data etc. */
2305 memset (&w->prev, 0, sizeof (ev_statdata));
2306 memset (&w->attr, 0, sizeof (ev_statdata));
2307
2308 ev_stat_stat (EV_A_ w); 4730 ev_stat_stat (EV_A_ w);
2309 4731
4732 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2310 if (w->interval < MIN_STAT_INTERVAL) 4733 w->interval = MIN_STAT_INTERVAL;
2311 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2312 4734
2313 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 4735 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2314 ev_set_priority (&w->timer, ev_priority (w)); 4736 ev_set_priority (&w->timer, ev_priority (w));
2315 4737
2316#if EV_USE_INOTIFY 4738#if EV_USE_INOTIFY
2317 infy_init (EV_A); 4739 infy_init (EV_A);
2318 4740
2319 if (fs_fd >= 0) 4741 if (fs_fd >= 0)
2320 infy_add (EV_A_ w); 4742 infy_add (EV_A_ w);
2321 else 4743 else
2322#endif 4744#endif
4745 {
2323 ev_timer_start (EV_A_ &w->timer); 4746 ev_timer_again (EV_A_ &w->timer);
4747 ev_unref (EV_A);
4748 }
2324 4749
2325 ev_start (EV_A_ (W)w, 1); 4750 ev_start (EV_A_ (W)w, 1);
2326}
2327 4751
4752 EV_FREQUENT_CHECK;
4753}
4754
2328void 4755void
2329ev_stat_stop (EV_P_ ev_stat *w) 4756ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
2330{ 4757{
2331 clear_pending (EV_A_ (W)w); 4758 clear_pending (EV_A_ (W)w);
2332 if (expect_false (!ev_is_active (w))) 4759 if (ecb_expect_false (!ev_is_active (w)))
2333 return; 4760 return;
4761
4762 EV_FREQUENT_CHECK;
2334 4763
2335#if EV_USE_INOTIFY 4764#if EV_USE_INOTIFY
2336 infy_del (EV_A_ w); 4765 infy_del (EV_A_ w);
2337#endif 4766#endif
4767
4768 if (ev_is_active (&w->timer))
4769 {
4770 ev_ref (EV_A);
2338 ev_timer_stop (EV_A_ &w->timer); 4771 ev_timer_stop (EV_A_ &w->timer);
4772 }
2339 4773
2340 ev_stop (EV_A_ (W)w); 4774 ev_stop (EV_A_ (W)w);
4775
4776 EV_FREQUENT_CHECK;
2341} 4777}
2342#endif 4778#endif
2343 4779
2344#if EV_IDLE_ENABLE 4780#if EV_IDLE_ENABLE
2345void 4781void
2346ev_idle_start (EV_P_ ev_idle *w) 4782ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
2347{ 4783{
2348 if (expect_false (ev_is_active (w))) 4784 if (ecb_expect_false (ev_is_active (w)))
2349 return; 4785 return;
2350 4786
2351 pri_adjust (EV_A_ (W)w); 4787 pri_adjust (EV_A_ (W)w);
4788
4789 EV_FREQUENT_CHECK;
2352 4790
2353 { 4791 {
2354 int active = ++idlecnt [ABSPRI (w)]; 4792 int active = ++idlecnt [ABSPRI (w)];
2355 4793
2356 ++idleall; 4794 ++idleall;
2357 ev_start (EV_A_ (W)w, active); 4795 ev_start (EV_A_ (W)w, active);
2358 4796
2359 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4797 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
2360 idles [ABSPRI (w)][active - 1] = w; 4798 idles [ABSPRI (w)][active - 1] = w;
2361 } 4799 }
2362}
2363 4800
4801 EV_FREQUENT_CHECK;
4802}
4803
2364void 4804void
2365ev_idle_stop (EV_P_ ev_idle *w) 4805ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
2366{ 4806{
2367 clear_pending (EV_A_ (W)w); 4807 clear_pending (EV_A_ (W)w);
2368 if (expect_false (!ev_is_active (w))) 4808 if (ecb_expect_false (!ev_is_active (w)))
2369 return; 4809 return;
2370 4810
4811 EV_FREQUENT_CHECK;
4812
2371 { 4813 {
2372 int active = ((W)w)->active; 4814 int active = ev_active (w);
2373 4815
2374 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 4816 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2375 ((W)idles [ABSPRI (w)][active - 1])->active = active; 4817 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2376 4818
2377 ev_stop (EV_A_ (W)w); 4819 ev_stop (EV_A_ (W)w);
2378 --idleall; 4820 --idleall;
2379 } 4821 }
2380}
2381#endif
2382 4822
4823 EV_FREQUENT_CHECK;
4824}
4825#endif
4826
4827#if EV_PREPARE_ENABLE
2383void 4828void
2384ev_prepare_start (EV_P_ ev_prepare *w) 4829ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
2385{ 4830{
2386 if (expect_false (ev_is_active (w))) 4831 if (ecb_expect_false (ev_is_active (w)))
2387 return; 4832 return;
2388 4833
4834 EV_FREQUENT_CHECK;
4835
2389 ev_start (EV_A_ (W)w, ++preparecnt); 4836 ev_start (EV_A_ (W)w, ++preparecnt);
2390 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4837 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
2391 prepares [preparecnt - 1] = w; 4838 prepares [preparecnt - 1] = w;
2392}
2393 4839
4840 EV_FREQUENT_CHECK;
4841}
4842
2394void 4843void
2395ev_prepare_stop (EV_P_ ev_prepare *w) 4844ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
2396{ 4845{
2397 clear_pending (EV_A_ (W)w); 4846 clear_pending (EV_A_ (W)w);
2398 if (expect_false (!ev_is_active (w))) 4847 if (ecb_expect_false (!ev_is_active (w)))
2399 return; 4848 return;
2400 4849
4850 EV_FREQUENT_CHECK;
4851
2401 { 4852 {
2402 int active = ((W)w)->active; 4853 int active = ev_active (w);
4854
2403 prepares [active - 1] = prepares [--preparecnt]; 4855 prepares [active - 1] = prepares [--preparecnt];
2404 ((W)prepares [active - 1])->active = active; 4856 ev_active (prepares [active - 1]) = active;
2405 } 4857 }
2406 4858
2407 ev_stop (EV_A_ (W)w); 4859 ev_stop (EV_A_ (W)w);
2408}
2409 4860
4861 EV_FREQUENT_CHECK;
4862}
4863#endif
4864
4865#if EV_CHECK_ENABLE
2410void 4866void
2411ev_check_start (EV_P_ ev_check *w) 4867ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
2412{ 4868{
2413 if (expect_false (ev_is_active (w))) 4869 if (ecb_expect_false (ev_is_active (w)))
2414 return; 4870 return;
2415 4871
4872 EV_FREQUENT_CHECK;
4873
2416 ev_start (EV_A_ (W)w, ++checkcnt); 4874 ev_start (EV_A_ (W)w, ++checkcnt);
2417 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4875 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
2418 checks [checkcnt - 1] = w; 4876 checks [checkcnt - 1] = w;
2419}
2420 4877
4878 EV_FREQUENT_CHECK;
4879}
4880
2421void 4881void
2422ev_check_stop (EV_P_ ev_check *w) 4882ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
2423{ 4883{
2424 clear_pending (EV_A_ (W)w); 4884 clear_pending (EV_A_ (W)w);
2425 if (expect_false (!ev_is_active (w))) 4885 if (ecb_expect_false (!ev_is_active (w)))
2426 return; 4886 return;
2427 4887
4888 EV_FREQUENT_CHECK;
4889
2428 { 4890 {
2429 int active = ((W)w)->active; 4891 int active = ev_active (w);
4892
2430 checks [active - 1] = checks [--checkcnt]; 4893 checks [active - 1] = checks [--checkcnt];
2431 ((W)checks [active - 1])->active = active; 4894 ev_active (checks [active - 1]) = active;
2432 } 4895 }
2433 4896
2434 ev_stop (EV_A_ (W)w); 4897 ev_stop (EV_A_ (W)w);
4898
4899 EV_FREQUENT_CHECK;
2435} 4900}
4901#endif
2436 4902
2437#if EV_EMBED_ENABLE 4903#if EV_EMBED_ENABLE
2438void noinline 4904ecb_noinline
4905void
2439ev_embed_sweep (EV_P_ ev_embed *w) 4906ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
2440{ 4907{
2441 ev_loop (w->other, EVLOOP_NONBLOCK); 4908 ev_run (w->other, EVRUN_NOWAIT);
2442} 4909}
2443 4910
2444static void 4911static void
2445embed_io_cb (EV_P_ ev_io *io, int revents) 4912embed_io_cb (EV_P_ ev_io *io, int revents)
2446{ 4913{
2447 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4914 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2448 4915
2449 if (ev_cb (w)) 4916 if (ev_cb (w))
2450 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4917 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2451 else 4918 else
2452 ev_loop (w->other, EVLOOP_NONBLOCK); 4919 ev_run (w->other, EVRUN_NOWAIT);
2453} 4920}
2454 4921
2455static void 4922static void
2456embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4923embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2457{ 4924{
2458 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 4925 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2459 4926
2460 { 4927 {
2461 struct ev_loop *loop = w->other; 4928 EV_P = w->other;
2462 4929
2463 while (fdchangecnt) 4930 while (fdchangecnt)
2464 { 4931 {
2465 fd_reify (EV_A); 4932 fd_reify (EV_A);
2466 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4933 ev_run (EV_A_ EVRUN_NOWAIT);
2467 } 4934 }
2468 } 4935 }
4936}
4937
4938static void
4939embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4940{
4941 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4942
4943 ev_embed_stop (EV_A_ w);
4944
4945 {
4946 EV_P = w->other;
4947
4948 ev_loop_fork (EV_A);
4949 ev_run (EV_A_ EVRUN_NOWAIT);
4950 }
4951
4952 ev_embed_start (EV_A_ w);
2469} 4953}
2470 4954
2471#if 0 4955#if 0
2472static void 4956static void
2473embed_idle_cb (EV_P_ ev_idle *idle, int revents) 4957embed_idle_cb (EV_P_ ev_idle *idle, int revents)
… …
2475 ev_idle_stop (EV_A_ idle); 4959 ev_idle_stop (EV_A_ idle);
2476} 4960}
2477#endif 4961#endif
2478 4962
2479void 4963void
2480ev_embed_start (EV_P_ ev_embed *w) 4964ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
2481{ 4965{
2482 if (expect_false (ev_is_active (w))) 4966 if (ecb_expect_false (ev_is_active (w)))
2483 return; 4967 return;
2484 4968
2485 { 4969 {
2486 struct ev_loop *loop = w->other; 4970 EV_P = w->other;
2487 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4971 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2488 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 4972 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2489 } 4973 }
4974
4975 EV_FREQUENT_CHECK;
2490 4976
2491 ev_set_priority (&w->io, ev_priority (w)); 4977 ev_set_priority (&w->io, ev_priority (w));
2492 ev_io_start (EV_A_ &w->io); 4978 ev_io_start (EV_A_ &w->io);
2493 4979
2494 ev_prepare_init (&w->prepare, embed_prepare_cb); 4980 ev_prepare_init (&w->prepare, embed_prepare_cb);
2495 ev_set_priority (&w->prepare, EV_MINPRI); 4981 ev_set_priority (&w->prepare, EV_MINPRI);
2496 ev_prepare_start (EV_A_ &w->prepare); 4982 ev_prepare_start (EV_A_ &w->prepare);
2497 4983
4984 ev_fork_init (&w->fork, embed_fork_cb);
4985 ev_fork_start (EV_A_ &w->fork);
4986
2498 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 4987 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2499 4988
2500 ev_start (EV_A_ (W)w, 1); 4989 ev_start (EV_A_ (W)w, 1);
2501}
2502 4990
4991 EV_FREQUENT_CHECK;
4992}
4993
2503void 4994void
2504ev_embed_stop (EV_P_ ev_embed *w) 4995ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
2505{ 4996{
2506 clear_pending (EV_A_ (W)w); 4997 clear_pending (EV_A_ (W)w);
2507 if (expect_false (!ev_is_active (w))) 4998 if (ecb_expect_false (!ev_is_active (w)))
2508 return; 4999 return;
2509 5000
5001 EV_FREQUENT_CHECK;
5002
2510 ev_io_stop (EV_A_ &w->io); 5003 ev_io_stop (EV_A_ &w->io);
2511 ev_prepare_stop (EV_A_ &w->prepare); 5004 ev_prepare_stop (EV_A_ &w->prepare);
5005 ev_fork_stop (EV_A_ &w->fork);
2512 5006
2513 ev_stop (EV_A_ (W)w); 5007 ev_stop (EV_A_ (W)w);
5008
5009 EV_FREQUENT_CHECK;
2514} 5010}
2515#endif 5011#endif
2516 5012
2517#if EV_FORK_ENABLE 5013#if EV_FORK_ENABLE
2518void 5014void
2519ev_fork_start (EV_P_ ev_fork *w) 5015ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
2520{ 5016{
2521 if (expect_false (ev_is_active (w))) 5017 if (ecb_expect_false (ev_is_active (w)))
2522 return; 5018 return;
2523 5019
5020 EV_FREQUENT_CHECK;
5021
2524 ev_start (EV_A_ (W)w, ++forkcnt); 5022 ev_start (EV_A_ (W)w, ++forkcnt);
2525 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 5023 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
2526 forks [forkcnt - 1] = w; 5024 forks [forkcnt - 1] = w;
2527}
2528 5025
5026 EV_FREQUENT_CHECK;
5027}
5028
2529void 5029void
2530ev_fork_stop (EV_P_ ev_fork *w) 5030ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
2531{ 5031{
2532 clear_pending (EV_A_ (W)w); 5032 clear_pending (EV_A_ (W)w);
2533 if (expect_false (!ev_is_active (w))) 5033 if (ecb_expect_false (!ev_is_active (w)))
2534 return; 5034 return;
2535 5035
5036 EV_FREQUENT_CHECK;
5037
2536 { 5038 {
2537 int active = ((W)w)->active; 5039 int active = ev_active (w);
5040
2538 forks [active - 1] = forks [--forkcnt]; 5041 forks [active - 1] = forks [--forkcnt];
2539 ((W)forks [active - 1])->active = active; 5042 ev_active (forks [active - 1]) = active;
2540 } 5043 }
2541 5044
2542 ev_stop (EV_A_ (W)w); 5045 ev_stop (EV_A_ (W)w);
5046
5047 EV_FREQUENT_CHECK;
5048}
5049#endif
5050
5051#if EV_CLEANUP_ENABLE
5052void
5053ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
5054{
5055 if (ecb_expect_false (ev_is_active (w)))
5056 return;
5057
5058 EV_FREQUENT_CHECK;
5059
5060 ev_start (EV_A_ (W)w, ++cleanupcnt);
5061 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
5062 cleanups [cleanupcnt - 1] = w;
5063
5064 /* cleanup watchers should never keep a refcount on the loop */
5065 ev_unref (EV_A);
5066 EV_FREQUENT_CHECK;
5067}
5068
5069void
5070ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
5071{
5072 clear_pending (EV_A_ (W)w);
5073 if (ecb_expect_false (!ev_is_active (w)))
5074 return;
5075
5076 EV_FREQUENT_CHECK;
5077 ev_ref (EV_A);
5078
5079 {
5080 int active = ev_active (w);
5081
5082 cleanups [active - 1] = cleanups [--cleanupcnt];
5083 ev_active (cleanups [active - 1]) = active;
5084 }
5085
5086 ev_stop (EV_A_ (W)w);
5087
5088 EV_FREQUENT_CHECK;
2543} 5089}
2544#endif 5090#endif
2545 5091
2546#if EV_ASYNC_ENABLE 5092#if EV_ASYNC_ENABLE
2547void 5093void
2548ev_async_start (EV_P_ ev_async *w) 5094ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
2549{ 5095{
2550 if (expect_false (ev_is_active (w))) 5096 if (ecb_expect_false (ev_is_active (w)))
2551 return; 5097 return;
2552 5098
5099 w->sent = 0;
5100
2553 evpipe_init (EV_A); 5101 evpipe_init (EV_A);
2554 5102
5103 EV_FREQUENT_CHECK;
5104
2555 ev_start (EV_A_ (W)w, ++asynccnt); 5105 ev_start (EV_A_ (W)w, ++asynccnt);
2556 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 5106 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
2557 asyncs [asynccnt - 1] = w; 5107 asyncs [asynccnt - 1] = w;
2558}
2559 5108
5109 EV_FREQUENT_CHECK;
5110}
5111
2560void 5112void
2561ev_async_stop (EV_P_ ev_async *w) 5113ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
2562{ 5114{
2563 clear_pending (EV_A_ (W)w); 5115 clear_pending (EV_A_ (W)w);
2564 if (expect_false (!ev_is_active (w))) 5116 if (ecb_expect_false (!ev_is_active (w)))
2565 return; 5117 return;
2566 5118
5119 EV_FREQUENT_CHECK;
5120
2567 { 5121 {
2568 int active = ((W)w)->active; 5122 int active = ev_active (w);
5123
2569 asyncs [active - 1] = asyncs [--asynccnt]; 5124 asyncs [active - 1] = asyncs [--asynccnt];
2570 ((W)asyncs [active - 1])->active = active; 5125 ev_active (asyncs [active - 1]) = active;
2571 } 5126 }
2572 5127
2573 ev_stop (EV_A_ (W)w); 5128 ev_stop (EV_A_ (W)w);
2574}
2575 5129
5130 EV_FREQUENT_CHECK;
5131}
5132
2576void 5133void
2577ev_async_send (EV_P_ ev_async *w) 5134ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
2578{ 5135{
2579 w->sent = 1; 5136 w->sent = 1;
2580 evpipe_write (EV_A_ &gotasync); 5137 evpipe_write (EV_A_ &async_pending);
2581} 5138}
2582#endif 5139#endif
2583 5140
2584/*****************************************************************************/ 5141/*****************************************************************************/
2585 5142
… …
2595once_cb (EV_P_ struct ev_once *once, int revents) 5152once_cb (EV_P_ struct ev_once *once, int revents)
2596{ 5153{
2597 void (*cb)(int revents, void *arg) = once->cb; 5154 void (*cb)(int revents, void *arg) = once->cb;
2598 void *arg = once->arg; 5155 void *arg = once->arg;
2599 5156
2600 ev_io_stop (EV_A_ &once->io); 5157 ev_io_stop (EV_A_ &once->io);
2601 ev_timer_stop (EV_A_ &once->to); 5158 ev_timer_stop (EV_A_ &once->to);
2602 ev_free (once); 5159 ev_free (once);
2603 5160
2604 cb (revents, arg); 5161 cb (revents, arg);
2605} 5162}
2606 5163
2607static void 5164static void
2608once_cb_io (EV_P_ ev_io *w, int revents) 5165once_cb_io (EV_P_ ev_io *w, int revents)
2609{ 5166{
2610 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 5167 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
5168
5169 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2611} 5170}
2612 5171
2613static void 5172static void
2614once_cb_to (EV_P_ ev_timer *w, int revents) 5173once_cb_to (EV_P_ ev_timer *w, int revents)
2615{ 5174{
2616 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 5175 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
2617}
2618 5176
5177 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
5178}
5179
2619void 5180void
2620ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5181ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
2621{ 5182{
2622 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5183 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2623
2624 if (expect_false (!once))
2625 {
2626 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
2627 return;
2628 }
2629 5184
2630 once->cb = cb; 5185 once->cb = cb;
2631 once->arg = arg; 5186 once->arg = arg;
2632 5187
2633 ev_init (&once->io, once_cb_io); 5188 ev_init (&once->io, once_cb_io);
… …
2643 ev_timer_set (&once->to, timeout, 0.); 5198 ev_timer_set (&once->to, timeout, 0.);
2644 ev_timer_start (EV_A_ &once->to); 5199 ev_timer_start (EV_A_ &once->to);
2645 } 5200 }
2646} 5201}
2647 5202
5203/*****************************************************************************/
5204
5205#if EV_WALK_ENABLE
5206ecb_cold
5207void
5208ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
5209{
5210 int i, j;
5211 ev_watcher_list *wl, *wn;
5212
5213 if (types & (EV_IO | EV_EMBED))
5214 for (i = 0; i < anfdmax; ++i)
5215 for (wl = anfds [i].head; wl; )
5216 {
5217 wn = wl->next;
5218
5219#if EV_EMBED_ENABLE
5220 if (ev_cb ((ev_io *)wl) == embed_io_cb)
5221 {
5222 if (types & EV_EMBED)
5223 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
5224 }
5225 else
5226#endif
5227#if EV_USE_INOTIFY
5228 if (ev_cb ((ev_io *)wl) == infy_cb)
5229 ;
5230 else
5231#endif
5232 if ((ev_io *)wl != &pipe_w)
5233 if (types & EV_IO)
5234 cb (EV_A_ EV_IO, wl);
5235
5236 wl = wn;
5237 }
5238
5239 if (types & (EV_TIMER | EV_STAT))
5240 for (i = timercnt + HEAP0; i-- > HEAP0; )
5241#if EV_STAT_ENABLE
5242 /*TODO: timer is not always active*/
5243 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
5244 {
5245 if (types & EV_STAT)
5246 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
5247 }
5248 else
5249#endif
5250 if (types & EV_TIMER)
5251 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
5252
5253#if EV_PERIODIC_ENABLE
5254 if (types & EV_PERIODIC)
5255 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
5256 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
5257#endif
5258
5259#if EV_IDLE_ENABLE
5260 if (types & EV_IDLE)
5261 for (j = NUMPRI; j--; )
5262 for (i = idlecnt [j]; i--; )
5263 cb (EV_A_ EV_IDLE, idles [j][i]);
5264#endif
5265
5266#if EV_FORK_ENABLE
5267 if (types & EV_FORK)
5268 for (i = forkcnt; i--; )
5269 if (ev_cb (forks [i]) != embed_fork_cb)
5270 cb (EV_A_ EV_FORK, forks [i]);
5271#endif
5272
5273#if EV_ASYNC_ENABLE
5274 if (types & EV_ASYNC)
5275 for (i = asynccnt; i--; )
5276 cb (EV_A_ EV_ASYNC, asyncs [i]);
5277#endif
5278
5279#if EV_PREPARE_ENABLE
5280 if (types & EV_PREPARE)
5281 for (i = preparecnt; i--; )
5282# if EV_EMBED_ENABLE
5283 if (ev_cb (prepares [i]) != embed_prepare_cb)
5284# endif
5285 cb (EV_A_ EV_PREPARE, prepares [i]);
5286#endif
5287
5288#if EV_CHECK_ENABLE
5289 if (types & EV_CHECK)
5290 for (i = checkcnt; i--; )
5291 cb (EV_A_ EV_CHECK, checks [i]);
5292#endif
5293
5294#if EV_SIGNAL_ENABLE
5295 if (types & EV_SIGNAL)
5296 for (i = 0; i < EV_NSIG - 1; ++i)
5297 for (wl = signals [i].head; wl; )
5298 {
5299 wn = wl->next;
5300 cb (EV_A_ EV_SIGNAL, wl);
5301 wl = wn;
5302 }
5303#endif
5304
5305#if EV_CHILD_ENABLE
5306 if (types & EV_CHILD)
5307 for (i = (EV_PID_HASHSIZE); i--; )
5308 for (wl = childs [i]; wl; )
5309 {
5310 wn = wl->next;
5311 cb (EV_A_ EV_CHILD, wl);
5312 wl = wn;
5313 }
5314#endif
5315/* EV_STAT 0x00001000 /* stat data changed */
5316/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
5317}
5318#endif
5319
2648#if EV_MULTIPLICITY 5320#if EV_MULTIPLICITY
2649 #include "ev_wrap.h" 5321 #include "ev_wrap.h"
2650#endif 5322#endif
2651 5323
2652#ifdef __cplusplus
2653}
2654#endif
2655

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