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Comparing libev/ev.c (file contents):
Revision 1.202 by root, Sat Dec 29 16:19:36 2007 UTC vs.
Revision 1.499 by root, Wed Jun 26 07:50:27 2019 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007-2019 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 40/* this big block deduces configuration from config.h */
41extern "C" {
42#endif
43
44#ifndef EV_STANDALONE 41#ifndef EV_STANDALONE
45# ifdef EV_CONFIG_H 42# ifdef EV_CONFIG_H
46# include EV_CONFIG_H 43# include EV_CONFIG_H
47# else 44# else
48# include "config.h" 45# include "config.h"
49# endif 46# endif
50 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
51# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
52# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
53# define EV_USE_MONOTONIC 1 70# define EV_USE_MONOTONIC 1
54# endif 71# endif
55# ifndef EV_USE_REALTIME 72# ifndef EV_USE_REALTIME
56# define EV_USE_REALTIME 1 73# define EV_USE_REALTIME 0
57# endif 74# endif
58# else 75# else
59# ifndef EV_USE_MONOTONIC 76# ifndef EV_USE_MONOTONIC
60# define EV_USE_MONOTONIC 0 77# define EV_USE_MONOTONIC 0
61# endif 78# endif
62# ifndef EV_USE_REALTIME 79# ifndef EV_USE_REALTIME
63# define EV_USE_REALTIME 0 80# define EV_USE_REALTIME 0
64# endif 81# endif
65# endif 82# endif
66 83
84# if HAVE_NANOSLEEP
67# ifndef EV_USE_NANOSLEEP 85# ifndef EV_USE_NANOSLEEP
68# if HAVE_NANOSLEEP
69# define EV_USE_NANOSLEEP 1 86# define EV_USE_NANOSLEEP EV_FEATURE_OS
87# endif
70# else 88# else
89# undef EV_USE_NANOSLEEP
71# 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
72# endif 96# endif
97# else
98# undef EV_USE_SELECT
99# define EV_USE_SELECT 0
73# endif 100# endif
74 101
102# if HAVE_POLL && HAVE_POLL_H
75# ifndef EV_USE_SELECT 103# ifndef EV_USE_POLL
76# if HAVE_SELECT && HAVE_SYS_SELECT_H 104# define EV_USE_POLL EV_FEATURE_BACKENDS
77# define EV_USE_SELECT 1
78# else
79# define EV_USE_SELECT 0
80# endif 105# endif
81# endif
82
83# ifndef EV_USE_POLL
84# if HAVE_POLL && HAVE_POLL_H
85# define EV_USE_POLL 1
86# else 106# else
107# undef EV_USE_POLL
87# define EV_USE_POLL 0 108# define EV_USE_POLL 0
88# endif
89# endif 109# endif
90 110
91# ifndef EV_USE_EPOLL
92# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H 111# if HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
93# define EV_USE_EPOLL 1 112# ifndef EV_USE_EPOLL
94# else 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
95# define EV_USE_EPOLL 0
96# endif 114# endif
115# else
116# undef EV_USE_EPOLL
117# define EV_USE_EPOLL 0
97# endif 118# endif
98 119
99# ifndef EV_USE_KQUEUE 120# if HAVE_LINUX_AIO_ABI_H
100# if HAVE_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H 121# ifndef EV_USE_LINUXAIO
101# define EV_USE_KQUEUE 1 122# define EV_USE_LINUXAIO EV_FEATURE_BACKENDS
102# else
103# define EV_USE_KQUEUE 0
104# endif 123# endif
124# else
125# undef EV_USE_LINUXAIO
126# define EV_USE_LINUXAIO 0
105# endif 127# endif
106 128
107# ifndef EV_USE_PORT 129# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
108# if HAVE_PORT_H && HAVE_PORT_CREATE 130# ifndef EV_USE_KQUEUE
109# define EV_USE_PORT 1 131# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
110# else
111# define EV_USE_PORT 0
112# endif 132# endif
133# else
134# undef EV_USE_KQUEUE
135# define EV_USE_KQUEUE 0
113# endif 136# endif
114 137
138# if HAVE_PORT_H && HAVE_PORT_CREATE
115# ifndef EV_USE_INOTIFY 139# ifndef EV_USE_PORT
116# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H 140# define EV_USE_PORT EV_FEATURE_BACKENDS
117# define EV_USE_INOTIFY 1
118# else
119# define EV_USE_INOTIFY 0
120# endif 141# endif
142# else
143# undef EV_USE_PORT
144# define EV_USE_PORT 0
121# endif 145# endif
122 146
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
123#endif 154# endif
124 155
125#include <math.h> 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
126#include <stdlib.h> 186#include <stdlib.h>
187#include <string.h>
127#include <fcntl.h> 188#include <fcntl.h>
128#include <stddef.h> 189#include <stddef.h>
129 190
130#include <stdio.h> 191#include <stdio.h>
131 192
132#include <assert.h> 193#include <assert.h>
133#include <errno.h> 194#include <errno.h>
134#include <sys/types.h> 195#include <sys/types.h>
135#include <time.h> 196#include <time.h>
197#include <limits.h>
136 198
137#include <signal.h> 199#include <signal.h>
138 200
139#ifdef EV_H 201#ifdef EV_H
140# include EV_H 202# include EV_H
141#else 203#else
142# 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
143#endif 216#endif
144 217
145#ifndef _WIN32 218#ifndef _WIN32
146# include <sys/time.h> 219# include <sys/time.h>
147# include <sys/wait.h> 220# include <sys/wait.h>
148# include <unistd.h> 221# include <unistd.h>
149#else 222#else
223# include <io.h>
150# define WIN32_LEAN_AND_MEAN 224# define WIN32_LEAN_AND_MEAN
225# include <winsock2.h>
151# include <windows.h> 226# include <windows.h>
152# ifndef EV_SELECT_IS_WINSOCKET 227# ifndef EV_SELECT_IS_WINSOCKET
153# define EV_SELECT_IS_WINSOCKET 1 228# define EV_SELECT_IS_WINSOCKET 1
154# endif 229# endif
230# undef EV_AVOID_STDIO
231#endif
232
233/* this block tries to deduce configuration from header-defined symbols and defaults */
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
155#endif 269# endif
270#endif
156 271
157/**/ 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
158 280
159#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
160# define EV_USE_MONOTONIC 0 285# define EV_USE_MONOTONIC 0
286# endif
161#endif 287#endif
162 288
163#ifndef EV_USE_REALTIME 289#ifndef EV_USE_REALTIME
164# define EV_USE_REALTIME 0 290# define EV_USE_REALTIME !EV_USE_CLOCK_SYSCALL
165#endif 291#endif
166 292
167#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
168# define EV_USE_NANOSLEEP 0 297# define EV_USE_NANOSLEEP 0
298# endif
169#endif 299#endif
170 300
171#ifndef EV_USE_SELECT 301#ifndef EV_USE_SELECT
172# define EV_USE_SELECT 1 302# define EV_USE_SELECT EV_FEATURE_BACKENDS
173#endif 303#endif
174 304
175#ifndef EV_USE_POLL 305#ifndef EV_USE_POLL
176# ifdef _WIN32 306# ifdef _WIN32
177# define EV_USE_POLL 0 307# define EV_USE_POLL 0
178# else 308# else
179# define EV_USE_POLL 1 309# define EV_USE_POLL EV_FEATURE_BACKENDS
180# endif 310# endif
181#endif 311#endif
182 312
183#ifndef EV_USE_EPOLL 313#ifndef EV_USE_EPOLL
314# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
315# define EV_USE_EPOLL EV_FEATURE_BACKENDS
316# else
184# define EV_USE_EPOLL 0 317# define EV_USE_EPOLL 0
318# endif
185#endif 319#endif
186 320
187#ifndef EV_USE_KQUEUE 321#ifndef EV_USE_KQUEUE
188# define EV_USE_KQUEUE 0 322# define EV_USE_KQUEUE 0
189#endif 323#endif
190 324
191#ifndef EV_USE_PORT 325#ifndef EV_USE_PORT
192# define EV_USE_PORT 0 326# define EV_USE_PORT 0
193#endif 327#endif
194 328
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
195#ifndef EV_USE_INOTIFY 337#ifndef EV_USE_INOTIFY
338# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
339# define EV_USE_INOTIFY EV_FEATURE_OS
340# else
196# define EV_USE_INOTIFY 0 341# define EV_USE_INOTIFY 0
342# endif
197#endif 343#endif
198 344
199#ifndef EV_PID_HASHSIZE 345#ifndef EV_PID_HASHSIZE
200# if EV_MINIMAL 346# define EV_PID_HASHSIZE EV_FEATURE_DATA ? 16 : 1
201# define EV_PID_HASHSIZE 1 347#endif
348
349#ifndef EV_INOTIFY_HASHSIZE
350# define EV_INOTIFY_HASHSIZE EV_FEATURE_DATA ? 16 : 1
351#endif
352
353#ifndef EV_USE_EVENTFD
354# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
355# define EV_USE_EVENTFD EV_FEATURE_OS
202# else 356# else
203# define EV_PID_HASHSIZE 16 357# define EV_USE_EVENTFD 0
204# endif 358# endif
205#endif 359#endif
206 360
207#ifndef EV_INOTIFY_HASHSIZE 361#ifndef EV_USE_SIGNALFD
208# if EV_MINIMAL 362# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
209# define EV_INOTIFY_HASHSIZE 1 363# define EV_USE_SIGNALFD EV_FEATURE_OS
210# else 364# else
211# define EV_INOTIFY_HASHSIZE 16 365# define EV_USE_SIGNALFD 0
212# endif 366# endif
213#endif 367#endif
214 368
215/**/ 369#if 0 /* debugging */
370# define EV_VERIFY 3
371# define EV_USE_4HEAP 1
372# define EV_HEAP_CACHE_AT 1
373#endif
374
375#ifndef EV_VERIFY
376# define EV_VERIFY (EV_FEATURE_API ? 1 : 0)
377#endif
378
379#ifndef EV_USE_4HEAP
380# define EV_USE_4HEAP EV_FEATURE_DATA
381#endif
382
383#ifndef EV_HEAP_CACHE_AT
384# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
385#endif
386
387#ifdef __ANDROID__
388/* supposedly, android doesn't typedef fd_mask */
389# undef EV_USE_SELECT
390# define EV_USE_SELECT 0
391/* supposedly, we need to include syscall.h, not sys/syscall.h, so just disable */
392# undef EV_USE_CLOCK_SYSCALL
393# define EV_USE_CLOCK_SYSCALL 0
394#endif
395
396/* aix's poll.h seems to cause lots of trouble */
397#ifdef _AIX
398/* AIX has a completely broken poll.h header */
399# undef EV_USE_POLL
400# define EV_USE_POLL 0
401#endif
402
403/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
404/* which makes programs even slower. might work on other unices, too. */
405#if EV_USE_CLOCK_SYSCALL
406# include <sys/syscall.h>
407# ifdef SYS_clock_gettime
408# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
409# undef EV_USE_MONOTONIC
410# define EV_USE_MONOTONIC 1
411# else
412# undef EV_USE_CLOCK_SYSCALL
413# define EV_USE_CLOCK_SYSCALL 0
414# endif
415#endif
416
417/* this block fixes any misconfiguration where we know we run into trouble otherwise */
216 418
217#ifndef CLOCK_MONOTONIC 419#ifndef CLOCK_MONOTONIC
218# undef EV_USE_MONOTONIC 420# undef EV_USE_MONOTONIC
219# define EV_USE_MONOTONIC 0 421# define EV_USE_MONOTONIC 0
220#endif 422#endif
… …
228# undef EV_USE_INOTIFY 430# undef EV_USE_INOTIFY
229# define EV_USE_INOTIFY 0 431# define EV_USE_INOTIFY 0
230#endif 432#endif
231 433
232#if !EV_USE_NANOSLEEP 434#if !EV_USE_NANOSLEEP
233# ifndef _WIN32 435/* hp-ux has it in sys/time.h, which we unconditionally include above */
436# if !defined _WIN32 && !defined __hpux
234# include <sys/select.h> 437# include <sys/select.h>
235# endif 438# endif
236#endif 439#endif
237 440
441#if EV_USE_LINUXAIO
442# include <sys/syscall.h>
443# if !SYS_io_getevents || !EV_USE_EPOLL /* ev_linxaio uses ev_poll.c:ev_epoll_create */
444# undef EV_USE_LINUXAIO
445# define EV_USE_LINUXAIO 0
446# endif
447#endif
448
238#if EV_USE_INOTIFY 449#if EV_USE_INOTIFY
450# include <sys/statfs.h>
239# include <sys/inotify.h> 451# include <sys/inotify.h>
452/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
453# ifndef IN_DONT_FOLLOW
454# undef EV_USE_INOTIFY
455# define EV_USE_INOTIFY 0
240#endif 456# endif
457#endif
241 458
242#if EV_SELECT_IS_WINSOCKET 459#if EV_USE_EVENTFD
460/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
243# include <winsock.h> 461# include <stdint.h>
462# ifndef EFD_NONBLOCK
463# define EFD_NONBLOCK O_NONBLOCK
464# endif
465# ifndef EFD_CLOEXEC
466# ifdef O_CLOEXEC
467# define EFD_CLOEXEC O_CLOEXEC
468# else
469# define EFD_CLOEXEC 02000000
470# endif
471# endif
472EV_CPP(extern "C") int (eventfd) (unsigned int initval, int flags);
473#endif
474
475#if EV_USE_SIGNALFD
476/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
477# include <stdint.h>
478# ifndef SFD_NONBLOCK
479# define SFD_NONBLOCK O_NONBLOCK
480# endif
481# ifndef SFD_CLOEXEC
482# ifdef O_CLOEXEC
483# define SFD_CLOEXEC O_CLOEXEC
484# else
485# define SFD_CLOEXEC 02000000
486# endif
487# endif
488EV_CPP (extern "C") int signalfd (int fd, const sigset_t *mask, int flags);
489
490struct signalfd_siginfo
491{
492 uint32_t ssi_signo;
493 char pad[128 - sizeof (uint32_t)];
494};
244#endif 495#endif
245 496
246/**/ 497/**/
247 498
499#if EV_VERIFY >= 3
500# define EV_FREQUENT_CHECK ev_verify (EV_A)
501#else
502# define EV_FREQUENT_CHECK do { } while (0)
503#endif
504
248/* 505/*
249 * This is used to avoid floating point rounding problems. 506 * This is used to work around floating point rounding problems.
250 * It is added to ev_rt_now when scheduling periodics
251 * to ensure progress, time-wise, even when rounding
252 * errors are against us.
253 * This value is good at least till the year 4000. 507 * This value is good at least till the year 4000.
254 * Better solutions welcome.
255 */ 508 */
256#define TIME_EPSILON 0.0001220703125 /* 1/8192 */ 509#define MIN_INTERVAL 0.0001220703125 /* 1/2**13, good till 4000 */
510/*#define MIN_INTERVAL 0.00000095367431640625 /* 1/2**20, good till 2200 */
257 511
258#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */ 512#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
259#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */ 513#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
260/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
261 514
515#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
516#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } while (0)
517
518/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
519/* ECB.H BEGIN */
520/*
521 * libecb - http://software.schmorp.de/pkg/libecb
522 *
523 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
524 * Copyright (©) 2011 Emanuele Giaquinta
525 * All rights reserved.
526 *
527 * Redistribution and use in source and binary forms, with or without modifica-
528 * tion, are permitted provided that the following conditions are met:
529 *
530 * 1. Redistributions of source code must retain the above copyright notice,
531 * this list of conditions and the following disclaimer.
532 *
533 * 2. Redistributions in binary form must reproduce the above copyright
534 * notice, this list of conditions and the following disclaimer in the
535 * documentation and/or other materials provided with the distribution.
536 *
537 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
538 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
539 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
540 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
541 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
542 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
543 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
544 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
545 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
546 * OF THE POSSIBILITY OF SUCH DAMAGE.
547 *
548 * Alternatively, the contents of this file may be used under the terms of
549 * the GNU General Public License ("GPL") version 2 or any later version,
550 * in which case the provisions of the GPL are applicable instead of
551 * the above. If you wish to allow the use of your version of this file
552 * only under the terms of the GPL and not to allow others to use your
553 * version of this file under the BSD license, indicate your decision
554 * by deleting the provisions above and replace them with the notice
555 * and other provisions required by the GPL. If you do not delete the
556 * provisions above, a recipient may use your version of this file under
557 * either the BSD or the GPL.
558 */
559
560#ifndef ECB_H
561#define ECB_H
562
563/* 16 bits major, 16 bits minor */
564#define ECB_VERSION 0x00010006
565
566#ifdef _WIN32
567 typedef signed char int8_t;
568 typedef unsigned char uint8_t;
569 typedef signed short int16_t;
570 typedef unsigned short uint16_t;
571 typedef signed int int32_t;
572 typedef unsigned int uint32_t;
262#if __GNUC__ >= 4 573 #if __GNUC__
263# define expect(expr,value) __builtin_expect ((expr),(value)) 574 typedef signed long long int64_t;
264# define noinline __attribute__ ((noinline)) 575 typedef unsigned long long uint64_t;
576 #else /* _MSC_VER || __BORLANDC__ */
577 typedef signed __int64 int64_t;
578 typedef unsigned __int64 uint64_t;
579 #endif
580 #ifdef _WIN64
581 #define ECB_PTRSIZE 8
582 typedef uint64_t uintptr_t;
583 typedef int64_t intptr_t;
584 #else
585 #define ECB_PTRSIZE 4
586 typedef uint32_t uintptr_t;
587 typedef int32_t intptr_t;
588 #endif
265#else 589#else
266# define expect(expr,value) (expr) 590 #include <inttypes.h>
267# define noinline 591 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
268# if __STDC_VERSION__ < 199901L 592 #define ECB_PTRSIZE 8
269# define inline 593 #else
594 #define ECB_PTRSIZE 4
595 #endif
270# endif 596#endif
597
598#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
599#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
600
601/* work around x32 idiocy by defining proper macros */
602#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
603 #if _ILP32
604 #define ECB_AMD64_X32 1
605 #else
606 #define ECB_AMD64 1
271#endif 607 #endif
608#endif
272 609
273#define expect_false(expr) expect ((expr) != 0, 0) 610/* many compilers define _GNUC_ to some versions but then only implement
274#define expect_true(expr) expect ((expr) != 0, 1) 611 * what their idiot authors think are the "more important" extensions,
275#define inline_size static inline 612 * causing enormous grief in return for some better fake benchmark numbers.
276 613 * or so.
277#if EV_MINIMAL 614 * we try to detect these and simply assume they are not gcc - if they have
278# define inline_speed static noinline 615 * an issue with that they should have done it right in the first place.
616 */
617#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
618 #define ECB_GCC_VERSION(major,minor) 0
279#else 619#else
620 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
621#endif
622
623#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
624
625#if __clang__ && defined __has_builtin
626 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
627#else
628 #define ECB_CLANG_BUILTIN(x) 0
629#endif
630
631#if __clang__ && defined __has_extension
632 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
633#else
634 #define ECB_CLANG_EXTENSION(x) 0
635#endif
636
637#define ECB_CPP (__cplusplus+0)
638#define ECB_CPP11 (__cplusplus >= 201103L)
639#define ECB_CPP14 (__cplusplus >= 201402L)
640#define ECB_CPP17 (__cplusplus >= 201703L)
641
642#if ECB_CPP
643 #define ECB_C 0
644 #define ECB_STDC_VERSION 0
645#else
646 #define ECB_C 1
647 #define ECB_STDC_VERSION __STDC_VERSION__
648#endif
649
650#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
651#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
652#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
653
654#if ECB_CPP
655 #define ECB_EXTERN_C extern "C"
656 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
657 #define ECB_EXTERN_C_END }
658#else
659 #define ECB_EXTERN_C extern
660 #define ECB_EXTERN_C_BEG
661 #define ECB_EXTERN_C_END
662#endif
663
664/*****************************************************************************/
665
666/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
667/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
668
669#if ECB_NO_THREADS
670 #define ECB_NO_SMP 1
671#endif
672
673#if ECB_NO_SMP
674 #define ECB_MEMORY_FENCE do { } while (0)
675#endif
676
677/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
678#if __xlC__ && ECB_CPP
679 #include <builtins.h>
680#endif
681
682#if 1400 <= _MSC_VER
683 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
684#endif
685
686#ifndef ECB_MEMORY_FENCE
687 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
688 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
689 #if __i386 || __i386__
690 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
691 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
692 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
693 #elif ECB_GCC_AMD64
694 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
695 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
696 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
697 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
698 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
699 #elif defined __ARM_ARCH_2__ \
700 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
701 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
702 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
703 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
704 || defined __ARM_ARCH_5TEJ__
705 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
706 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
707 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
708 || defined __ARM_ARCH_6T2__
709 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
710 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
711 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
712 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
713 #elif __aarch64__
714 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
715 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
716 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
717 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
718 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
719 #elif defined __s390__ || defined __s390x__
720 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
721 #elif defined __mips__
722 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
723 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
724 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
725 #elif defined __alpha__
726 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
727 #elif defined __hppa__
728 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
729 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
730 #elif defined __ia64__
731 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
732 #elif defined __m68k__
733 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
734 #elif defined __m88k__
735 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
736 #elif defined __sh__
737 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
738 #endif
739 #endif
740#endif
741
742#ifndef ECB_MEMORY_FENCE
743 #if ECB_GCC_VERSION(4,7)
744 /* see comment below (stdatomic.h) about the C11 memory model. */
745 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
746 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
747 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
748 #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
749
750 #elif ECB_CLANG_EXTENSION(c_atomic)
751 /* see comment below (stdatomic.h) about the C11 memory model. */
752 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
753 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
754 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
755 #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
756
757 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
758 #define ECB_MEMORY_FENCE __sync_synchronize ()
759 #elif _MSC_VER >= 1500 /* VC++ 2008 */
760 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
761 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
762 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
763 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
764 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
765 #elif _MSC_VER >= 1400 /* VC++ 2005 */
766 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
767 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
768 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
769 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
770 #elif defined _WIN32
771 #include <WinNT.h>
772 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
773 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
774 #include <mbarrier.h>
775 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
776 #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
777 #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
778 #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
779 #elif __xlC__
780 #define ECB_MEMORY_FENCE __sync ()
781 #endif
782#endif
783
784#ifndef ECB_MEMORY_FENCE
785 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
786 /* we assume that these memory fences work on all variables/all memory accesses, */
787 /* not just C11 atomics and atomic accesses */
788 #include <stdatomic.h>
789 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
790 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
791 #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
792 #endif
793#endif
794
795#ifndef ECB_MEMORY_FENCE
796 #if !ECB_AVOID_PTHREADS
797 /*
798 * if you get undefined symbol references to pthread_mutex_lock,
799 * or failure to find pthread.h, then you should implement
800 * the ECB_MEMORY_FENCE operations for your cpu/compiler
801 * OR provide pthread.h and link against the posix thread library
802 * of your system.
803 */
804 #include <pthread.h>
805 #define ECB_NEEDS_PTHREADS 1
806 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
807
808 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
809 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
810 #endif
811#endif
812
813#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
814 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
815#endif
816
817#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
818 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
819#endif
820
821#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
822 #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
823#endif
824
825/*****************************************************************************/
826
827#if ECB_CPP
828 #define ecb_inline static inline
829#elif ECB_GCC_VERSION(2,5)
830 #define ecb_inline static __inline__
831#elif ECB_C99
832 #define ecb_inline static inline
833#else
834 #define ecb_inline static
835#endif
836
837#if ECB_GCC_VERSION(3,3)
838 #define ecb_restrict __restrict__
839#elif ECB_C99
840 #define ecb_restrict restrict
841#else
842 #define ecb_restrict
843#endif
844
845typedef int ecb_bool;
846
847#define ECB_CONCAT_(a, b) a ## b
848#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
849#define ECB_STRINGIFY_(a) # a
850#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
851#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
852
853#define ecb_function_ ecb_inline
854
855#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
856 #define ecb_attribute(attrlist) __attribute__ (attrlist)
857#else
858 #define ecb_attribute(attrlist)
859#endif
860
861#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
862 #define ecb_is_constant(expr) __builtin_constant_p (expr)
863#else
864 /* possible C11 impl for integral types
865 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
866 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
867
868 #define ecb_is_constant(expr) 0
869#endif
870
871#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
872 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
873#else
874 #define ecb_expect(expr,value) (expr)
875#endif
876
877#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
878 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
879#else
880 #define ecb_prefetch(addr,rw,locality)
881#endif
882
883/* no emulation for ecb_decltype */
884#if ECB_CPP11
885 // older implementations might have problems with decltype(x)::type, work around it
886 template<class T> struct ecb_decltype_t { typedef T type; };
887 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
888#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
889 #define ecb_decltype(x) __typeof__ (x)
890#endif
891
892#if _MSC_VER >= 1300
893 #define ecb_deprecated __declspec (deprecated)
894#else
895 #define ecb_deprecated ecb_attribute ((__deprecated__))
896#endif
897
898#if _MSC_VER >= 1500
899 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
900#elif ECB_GCC_VERSION(4,5)
901 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
902#else
903 #define ecb_deprecated_message(msg) ecb_deprecated
904#endif
905
906#if _MSC_VER >= 1400
907 #define ecb_noinline __declspec (noinline)
908#else
909 #define ecb_noinline ecb_attribute ((__noinline__))
910#endif
911
912#define ecb_unused ecb_attribute ((__unused__))
913#define ecb_const ecb_attribute ((__const__))
914#define ecb_pure ecb_attribute ((__pure__))
915
916#if ECB_C11 || __IBMC_NORETURN
917 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
918 #define ecb_noreturn _Noreturn
919#elif ECB_CPP11
920 #define ecb_noreturn [[noreturn]]
921#elif _MSC_VER >= 1200
922 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
923 #define ecb_noreturn __declspec (noreturn)
924#else
925 #define ecb_noreturn ecb_attribute ((__noreturn__))
926#endif
927
928#if ECB_GCC_VERSION(4,3)
929 #define ecb_artificial ecb_attribute ((__artificial__))
930 #define ecb_hot ecb_attribute ((__hot__))
931 #define ecb_cold ecb_attribute ((__cold__))
932#else
933 #define ecb_artificial
934 #define ecb_hot
935 #define ecb_cold
936#endif
937
938/* put around conditional expressions if you are very sure that the */
939/* expression is mostly true or mostly false. note that these return */
940/* booleans, not the expression. */
941#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
942#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
943/* for compatibility to the rest of the world */
944#define ecb_likely(expr) ecb_expect_true (expr)
945#define ecb_unlikely(expr) ecb_expect_false (expr)
946
947/* count trailing zero bits and count # of one bits */
948#if ECB_GCC_VERSION(3,4) \
949 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
950 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
951 && ECB_CLANG_BUILTIN(__builtin_popcount))
952 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
953 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
954 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
955 #define ecb_ctz32(x) __builtin_ctz (x)
956 #define ecb_ctz64(x) __builtin_ctzll (x)
957 #define ecb_popcount32(x) __builtin_popcount (x)
958 /* no popcountll */
959#else
960 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
961 ecb_function_ ecb_const int
962 ecb_ctz32 (uint32_t x)
963 {
964#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
965 unsigned long r;
966 _BitScanForward (&r, x);
967 return (int)r;
968#else
969 int r = 0;
970
971 x &= ~x + 1; /* this isolates the lowest bit */
972
973#if ECB_branchless_on_i386
974 r += !!(x & 0xaaaaaaaa) << 0;
975 r += !!(x & 0xcccccccc) << 1;
976 r += !!(x & 0xf0f0f0f0) << 2;
977 r += !!(x & 0xff00ff00) << 3;
978 r += !!(x & 0xffff0000) << 4;
979#else
980 if (x & 0xaaaaaaaa) r += 1;
981 if (x & 0xcccccccc) r += 2;
982 if (x & 0xf0f0f0f0) r += 4;
983 if (x & 0xff00ff00) r += 8;
984 if (x & 0xffff0000) r += 16;
985#endif
986
987 return r;
988#endif
989 }
990
991 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
992 ecb_function_ ecb_const int
993 ecb_ctz64 (uint64_t x)
994 {
995#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
996 unsigned long r;
997 _BitScanForward64 (&r, x);
998 return (int)r;
999#else
1000 int shift = x & 0xffffffff ? 0 : 32;
1001 return ecb_ctz32 (x >> shift) + shift;
1002#endif
1003 }
1004
1005 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
1006 ecb_function_ ecb_const int
1007 ecb_popcount32 (uint32_t x)
1008 {
1009 x -= (x >> 1) & 0x55555555;
1010 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
1011 x = ((x >> 4) + x) & 0x0f0f0f0f;
1012 x *= 0x01010101;
1013
1014 return x >> 24;
1015 }
1016
1017 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
1018 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
1019 {
1020#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1021 unsigned long r;
1022 _BitScanReverse (&r, x);
1023 return (int)r;
1024#else
1025 int r = 0;
1026
1027 if (x >> 16) { x >>= 16; r += 16; }
1028 if (x >> 8) { x >>= 8; r += 8; }
1029 if (x >> 4) { x >>= 4; r += 4; }
1030 if (x >> 2) { x >>= 2; r += 2; }
1031 if (x >> 1) { r += 1; }
1032
1033 return r;
1034#endif
1035 }
1036
1037 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1038 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1039 {
1040#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1041 unsigned long r;
1042 _BitScanReverse64 (&r, x);
1043 return (int)r;
1044#else
1045 int r = 0;
1046
1047 if (x >> 32) { x >>= 32; r += 32; }
1048
1049 return r + ecb_ld32 (x);
1050#endif
1051 }
1052#endif
1053
1054ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1055ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1056ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1057ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1058
1059ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1060ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1061{
1062 return ( (x * 0x0802U & 0x22110U)
1063 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1064}
1065
1066ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1067ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1068{
1069 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1070 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1071 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1072 x = ( x >> 8 ) | ( x << 8);
1073
1074 return x;
1075}
1076
1077ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1078ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1079{
1080 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1081 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1082 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1083 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1084 x = ( x >> 16 ) | ( x << 16);
1085
1086 return x;
1087}
1088
1089/* popcount64 is only available on 64 bit cpus as gcc builtin */
1090/* so for this version we are lazy */
1091ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1092ecb_function_ ecb_const int
1093ecb_popcount64 (uint64_t x)
1094{
1095 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1096}
1097
1098ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1099ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1100ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1101ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1102ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1103ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1104ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1105ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1106
1107ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1108ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1109ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1110ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1111ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1112ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1113ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1114ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1115
1116#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1117 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1118 #define ecb_bswap16(x) __builtin_bswap16 (x)
1119 #else
1120 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1121 #endif
1122 #define ecb_bswap32(x) __builtin_bswap32 (x)
1123 #define ecb_bswap64(x) __builtin_bswap64 (x)
1124#elif _MSC_VER
1125 #include <stdlib.h>
1126 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1127 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1128 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1129#else
1130 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1131 ecb_function_ ecb_const uint16_t
1132 ecb_bswap16 (uint16_t x)
1133 {
1134 return ecb_rotl16 (x, 8);
1135 }
1136
1137 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1138 ecb_function_ ecb_const uint32_t
1139 ecb_bswap32 (uint32_t x)
1140 {
1141 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1142 }
1143
1144 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1145 ecb_function_ ecb_const uint64_t
1146 ecb_bswap64 (uint64_t x)
1147 {
1148 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1149 }
1150#endif
1151
1152#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1153 #define ecb_unreachable() __builtin_unreachable ()
1154#else
1155 /* this seems to work fine, but gcc always emits a warning for it :/ */
1156 ecb_inline ecb_noreturn void ecb_unreachable (void);
1157 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1158#endif
1159
1160/* try to tell the compiler that some condition is definitely true */
1161#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1162
1163ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1164ecb_inline ecb_const uint32_t
1165ecb_byteorder_helper (void)
1166{
1167 /* the union code still generates code under pressure in gcc, */
1168 /* but less than using pointers, and always seems to */
1169 /* successfully return a constant. */
1170 /* the reason why we have this horrible preprocessor mess */
1171 /* is to avoid it in all cases, at least on common architectures */
1172 /* or when using a recent enough gcc version (>= 4.6) */
1173#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1174 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1175 #define ECB_LITTLE_ENDIAN 1
1176 return 0x44332211;
1177#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1178 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1179 #define ECB_BIG_ENDIAN 1
1180 return 0x11223344;
1181#else
1182 union
1183 {
1184 uint8_t c[4];
1185 uint32_t u;
1186 } u = { 0x11, 0x22, 0x33, 0x44 };
1187 return u.u;
1188#endif
1189}
1190
1191ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1192ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1193ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1194ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1195
1196#if ECB_GCC_VERSION(3,0) || ECB_C99
1197 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1198#else
1199 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1200#endif
1201
1202#if ECB_CPP
1203 template<typename T>
1204 static inline T ecb_div_rd (T val, T div)
1205 {
1206 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1207 }
1208 template<typename T>
1209 static inline T ecb_div_ru (T val, T div)
1210 {
1211 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1212 }
1213#else
1214 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1215 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1216#endif
1217
1218#if ecb_cplusplus_does_not_suck
1219 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1220 template<typename T, int N>
1221 static inline int ecb_array_length (const T (&arr)[N])
1222 {
1223 return N;
1224 }
1225#else
1226 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1227#endif
1228
1229ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1230ecb_function_ ecb_const uint32_t
1231ecb_binary16_to_binary32 (uint32_t x)
1232{
1233 unsigned int s = (x & 0x8000) << (31 - 15);
1234 int e = (x >> 10) & 0x001f;
1235 unsigned int m = x & 0x03ff;
1236
1237 if (ecb_expect_false (e == 31))
1238 /* infinity or NaN */
1239 e = 255 - (127 - 15);
1240 else if (ecb_expect_false (!e))
1241 {
1242 if (ecb_expect_true (!m))
1243 /* zero, handled by code below by forcing e to 0 */
1244 e = 0 - (127 - 15);
1245 else
1246 {
1247 /* subnormal, renormalise */
1248 unsigned int s = 10 - ecb_ld32 (m);
1249
1250 m = (m << s) & 0x3ff; /* mask implicit bit */
1251 e -= s - 1;
1252 }
1253 }
1254
1255 /* e and m now are normalised, or zero, (or inf or nan) */
1256 e += 127 - 15;
1257
1258 return s | (e << 23) | (m << (23 - 10));
1259}
1260
1261ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1262ecb_function_ ecb_const uint16_t
1263ecb_binary32_to_binary16 (uint32_t x)
1264{
1265 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1266 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1267 unsigned int m = x & 0x007fffff;
1268
1269 x &= 0x7fffffff;
1270
1271 /* if it's within range of binary16 normals, use fast path */
1272 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1273 {
1274 /* mantissa round-to-even */
1275 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1276
1277 /* handle overflow */
1278 if (ecb_expect_false (m >= 0x00800000))
1279 {
1280 m >>= 1;
1281 e += 1;
1282 }
1283
1284 return s | (e << 10) | (m >> (23 - 10));
1285 }
1286
1287 /* handle large numbers and infinity */
1288 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1289 return s | 0x7c00;
1290
1291 /* handle zero, subnormals and small numbers */
1292 if (ecb_expect_true (x < 0x38800000))
1293 {
1294 /* zero */
1295 if (ecb_expect_true (!x))
1296 return s;
1297
1298 /* handle subnormals */
1299
1300 /* too small, will be zero */
1301 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1302 return s;
1303
1304 m |= 0x00800000; /* make implicit bit explicit */
1305
1306 /* very tricky - we need to round to the nearest e (+10) bit value */
1307 {
1308 unsigned int bits = 14 - e;
1309 unsigned int half = (1 << (bits - 1)) - 1;
1310 unsigned int even = (m >> bits) & 1;
1311
1312 /* if this overflows, we will end up with a normalised number */
1313 m = (m + half + even) >> bits;
1314 }
1315
1316 return s | m;
1317 }
1318
1319 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1320 m >>= 13;
1321
1322 return s | 0x7c00 | m | !m;
1323}
1324
1325/*******************************************************************************/
1326/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1327
1328/* basically, everything uses "ieee pure-endian" floating point numbers */
1329/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1330#if 0 \
1331 || __i386 || __i386__ \
1332 || ECB_GCC_AMD64 \
1333 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1334 || defined __s390__ || defined __s390x__ \
1335 || defined __mips__ \
1336 || defined __alpha__ \
1337 || defined __hppa__ \
1338 || defined __ia64__ \
1339 || defined __m68k__ \
1340 || defined __m88k__ \
1341 || defined __sh__ \
1342 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1343 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1344 || defined __aarch64__
1345 #define ECB_STDFP 1
1346 #include <string.h> /* for memcpy */
1347#else
1348 #define ECB_STDFP 0
1349#endif
1350
1351#ifndef ECB_NO_LIBM
1352
1353 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1354
1355 /* only the oldest of old doesn't have this one. solaris. */
1356 #ifdef INFINITY
1357 #define ECB_INFINITY INFINITY
1358 #else
1359 #define ECB_INFINITY HUGE_VAL
1360 #endif
1361
1362 #ifdef NAN
1363 #define ECB_NAN NAN
1364 #else
1365 #define ECB_NAN ECB_INFINITY
1366 #endif
1367
1368 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1369 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1370 #define ecb_frexpf(x,e) frexpf ((x), (e))
1371 #else
1372 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1373 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1374 #endif
1375
1376 /* convert a float to ieee single/binary32 */
1377 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1378 ecb_function_ ecb_const uint32_t
1379 ecb_float_to_binary32 (float x)
1380 {
1381 uint32_t r;
1382
1383 #if ECB_STDFP
1384 memcpy (&r, &x, 4);
1385 #else
1386 /* slow emulation, works for anything but -0 */
1387 uint32_t m;
1388 int e;
1389
1390 if (x == 0e0f ) return 0x00000000U;
1391 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1392 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1393 if (x != x ) return 0x7fbfffffU;
1394
1395 m = ecb_frexpf (x, &e) * 0x1000000U;
1396
1397 r = m & 0x80000000U;
1398
1399 if (r)
1400 m = -m;
1401
1402 if (e <= -126)
1403 {
1404 m &= 0xffffffU;
1405 m >>= (-125 - e);
1406 e = -126;
1407 }
1408
1409 r |= (e + 126) << 23;
1410 r |= m & 0x7fffffU;
1411 #endif
1412
1413 return r;
1414 }
1415
1416 /* converts an ieee single/binary32 to a float */
1417 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1418 ecb_function_ ecb_const float
1419 ecb_binary32_to_float (uint32_t x)
1420 {
1421 float r;
1422
1423 #if ECB_STDFP
1424 memcpy (&r, &x, 4);
1425 #else
1426 /* emulation, only works for normals and subnormals and +0 */
1427 int neg = x >> 31;
1428 int e = (x >> 23) & 0xffU;
1429
1430 x &= 0x7fffffU;
1431
1432 if (e)
1433 x |= 0x800000U;
1434 else
1435 e = 1;
1436
1437 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1438 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1439
1440 r = neg ? -r : r;
1441 #endif
1442
1443 return r;
1444 }
1445
1446 /* convert a double to ieee double/binary64 */
1447 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1448 ecb_function_ ecb_const uint64_t
1449 ecb_double_to_binary64 (double x)
1450 {
1451 uint64_t r;
1452
1453 #if ECB_STDFP
1454 memcpy (&r, &x, 8);
1455 #else
1456 /* slow emulation, works for anything but -0 */
1457 uint64_t m;
1458 int e;
1459
1460 if (x == 0e0 ) return 0x0000000000000000U;
1461 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1462 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1463 if (x != x ) return 0X7ff7ffffffffffffU;
1464
1465 m = frexp (x, &e) * 0x20000000000000U;
1466
1467 r = m & 0x8000000000000000;;
1468
1469 if (r)
1470 m = -m;
1471
1472 if (e <= -1022)
1473 {
1474 m &= 0x1fffffffffffffU;
1475 m >>= (-1021 - e);
1476 e = -1022;
1477 }
1478
1479 r |= ((uint64_t)(e + 1022)) << 52;
1480 r |= m & 0xfffffffffffffU;
1481 #endif
1482
1483 return r;
1484 }
1485
1486 /* converts an ieee double/binary64 to a double */
1487 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1488 ecb_function_ ecb_const double
1489 ecb_binary64_to_double (uint64_t x)
1490 {
1491 double r;
1492
1493 #if ECB_STDFP
1494 memcpy (&r, &x, 8);
1495 #else
1496 /* emulation, only works for normals and subnormals and +0 */
1497 int neg = x >> 63;
1498 int e = (x >> 52) & 0x7ffU;
1499
1500 x &= 0xfffffffffffffU;
1501
1502 if (e)
1503 x |= 0x10000000000000U;
1504 else
1505 e = 1;
1506
1507 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1508 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1509
1510 r = neg ? -r : r;
1511 #endif
1512
1513 return r;
1514 }
1515
1516 /* convert a float to ieee half/binary16 */
1517 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1518 ecb_function_ ecb_const uint16_t
1519 ecb_float_to_binary16 (float x)
1520 {
1521 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1522 }
1523
1524 /* convert an ieee half/binary16 to float */
1525 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1526 ecb_function_ ecb_const float
1527 ecb_binary16_to_float (uint16_t x)
1528 {
1529 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1530 }
1531
1532#endif
1533
1534#endif
1535
1536/* ECB.H END */
1537
1538#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1539/* if your architecture doesn't need memory fences, e.g. because it is
1540 * single-cpu/core, or if you use libev in a project that doesn't use libev
1541 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1542 * libev, in which cases the memory fences become nops.
1543 * alternatively, you can remove this #error and link against libpthread,
1544 * which will then provide the memory fences.
1545 */
1546# error "memory fences not defined for your architecture, please report"
1547#endif
1548
1549#ifndef ECB_MEMORY_FENCE
1550# define ECB_MEMORY_FENCE do { } while (0)
1551# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1552# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1553#endif
1554
1555#define expect_false(cond) ecb_expect_false (cond)
1556#define expect_true(cond) ecb_expect_true (cond)
1557#define noinline ecb_noinline
1558
1559#define inline_size ecb_inline
1560
1561#if EV_FEATURE_CODE
280# define inline_speed static inline 1562# define inline_speed ecb_inline
1563#else
1564# define inline_speed noinline static
281#endif 1565#endif
282 1566
283#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1567#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
1568
1569#if EV_MINPRI == EV_MAXPRI
1570# define ABSPRI(w) (((W)w), 0)
1571#else
284#define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1572# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
1573#endif
285 1574
286#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1575#define EMPTY /* required for microsofts broken pseudo-c compiler */
287#define EMPTY2(a,b) /* used to suppress some warnings */
288 1576
289typedef ev_watcher *W; 1577typedef ev_watcher *W;
290typedef ev_watcher_list *WL; 1578typedef ev_watcher_list *WL;
291typedef ev_watcher_time *WT; 1579typedef ev_watcher_time *WT;
292 1580
1581#define ev_active(w) ((W)(w))->active
1582#define ev_at(w) ((WT)(w))->at
1583
1584#if EV_USE_REALTIME
1585/* sig_atomic_t is used to avoid per-thread variables or locking but still */
1586/* giving it a reasonably high chance of working on typical architectures */
1587static EV_ATOMIC_T have_realtime; /* did clock_gettime (CLOCK_REALTIME) work? */
1588#endif
1589
293#if EV_USE_MONOTONIC 1590#if EV_USE_MONOTONIC
294/* sig_atomic_t is used to avoid per-thread variables or locking but still */
295/* giving it a reasonably high chance of working on typical architetcures */
296static sig_atomic_t have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */ 1591static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
1592#endif
1593
1594#ifndef EV_FD_TO_WIN32_HANDLE
1595# define EV_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd)
1596#endif
1597#ifndef EV_WIN32_HANDLE_TO_FD
1598# define EV_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0)
1599#endif
1600#ifndef EV_WIN32_CLOSE_FD
1601# define EV_WIN32_CLOSE_FD(fd) close (fd)
297#endif 1602#endif
298 1603
299#ifdef _WIN32 1604#ifdef _WIN32
300# include "ev_win32.c" 1605# include "ev_win32.c"
301#endif 1606#endif
302 1607
303/*****************************************************************************/ 1608/*****************************************************************************/
304 1609
1610#if EV_USE_LINUXAIO
1611# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
1612#endif
1613
1614/* define a suitable floor function (only used by periodics atm) */
1615
1616#if EV_USE_FLOOR
1617# include <math.h>
1618# define ev_floor(v) floor (v)
1619#else
1620
1621#include <float.h>
1622
1623/* a floor() replacement function, should be independent of ev_tstamp type */
1624noinline
1625static ev_tstamp
1626ev_floor (ev_tstamp v)
1627{
1628 /* the choice of shift factor is not terribly important */
1629#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1630 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1631#else
1632 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1633#endif
1634
1635 /* argument too large for an unsigned long? */
1636 if (expect_false (v >= shift))
1637 {
1638 ev_tstamp f;
1639
1640 if (v == v - 1.)
1641 return v; /* very large number */
1642
1643 f = shift * ev_floor (v * (1. / shift));
1644 return f + ev_floor (v - f);
1645 }
1646
1647 /* special treatment for negative args? */
1648 if (expect_false (v < 0.))
1649 {
1650 ev_tstamp f = -ev_floor (-v);
1651
1652 return f - (f == v ? 0 : 1);
1653 }
1654
1655 /* fits into an unsigned long */
1656 return (unsigned long)v;
1657}
1658
1659#endif
1660
1661/*****************************************************************************/
1662
1663#ifdef __linux
1664# include <sys/utsname.h>
1665#endif
1666
1667noinline ecb_cold
1668static unsigned int
1669ev_linux_version (void)
1670{
1671#ifdef __linux
1672 unsigned int v = 0;
1673 struct utsname buf;
1674 int i;
1675 char *p = buf.release;
1676
1677 if (uname (&buf))
1678 return 0;
1679
1680 for (i = 3+1; --i; )
1681 {
1682 unsigned int c = 0;
1683
1684 for (;;)
1685 {
1686 if (*p >= '0' && *p <= '9')
1687 c = c * 10 + *p++ - '0';
1688 else
1689 {
1690 p += *p == '.';
1691 break;
1692 }
1693 }
1694
1695 v = (v << 8) | c;
1696 }
1697
1698 return v;
1699#else
1700 return 0;
1701#endif
1702}
1703
1704/*****************************************************************************/
1705
1706#if EV_AVOID_STDIO
1707noinline ecb_cold
1708static void
1709ev_printerr (const char *msg)
1710{
1711 write (STDERR_FILENO, msg, strlen (msg));
1712}
1713#endif
1714
305static void (*syserr_cb)(const char *msg); 1715static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
306 1716
1717ecb_cold
307void 1718void
308ev_set_syserr_cb (void (*cb)(const char *msg)) 1719ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
309{ 1720{
310 syserr_cb = cb; 1721 syserr_cb = cb;
311} 1722}
312 1723
313static void noinline 1724noinline ecb_cold
1725static void
314syserr (const char *msg) 1726ev_syserr (const char *msg)
315{ 1727{
316 if (!msg) 1728 if (!msg)
317 msg = "(libev) system error"; 1729 msg = "(libev) system error";
318 1730
319 if (syserr_cb) 1731 if (syserr_cb)
320 syserr_cb (msg); 1732 syserr_cb (msg);
321 else 1733 else
322 { 1734 {
1735#if EV_AVOID_STDIO
1736 ev_printerr (msg);
1737 ev_printerr (": ");
1738 ev_printerr (strerror (errno));
1739 ev_printerr ("\n");
1740#else
323 perror (msg); 1741 perror (msg);
1742#endif
324 abort (); 1743 abort ();
325 } 1744 }
326} 1745}
327 1746
328static void *(*alloc)(void *ptr, long size); 1747static void *
1748ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
1749{
1750 /* some systems, notably openbsd and darwin, fail to properly
1751 * implement realloc (x, 0) (as required by both ansi c-89 and
1752 * the single unix specification, so work around them here.
1753 * recently, also (at least) fedora and debian started breaking it,
1754 * despite documenting it otherwise.
1755 */
329 1756
1757 if (size)
1758 return realloc (ptr, size);
1759
1760 free (ptr);
1761 return 0;
1762}
1763
1764static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
1765
1766ecb_cold
330void 1767void
331ev_set_allocator (void *(*cb)(void *ptr, long size)) 1768ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
332{ 1769{
333 alloc = cb; 1770 alloc = cb;
334} 1771}
335 1772
336inline_speed void * 1773inline_speed void *
337ev_realloc (void *ptr, long size) 1774ev_realloc (void *ptr, long size)
338{ 1775{
339 ptr = alloc ? alloc (ptr, size) : realloc (ptr, size); 1776 ptr = alloc (ptr, size);
340 1777
341 if (!ptr && size) 1778 if (!ptr && size)
342 { 1779 {
1780#if EV_AVOID_STDIO
1781 ev_printerr ("(libev) memory allocation failed, aborting.\n");
1782#else
343 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1783 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
1784#endif
344 abort (); 1785 abort ();
345 } 1786 }
346 1787
347 return ptr; 1788 return ptr;
348} 1789}
… …
350#define ev_malloc(size) ev_realloc (0, (size)) 1791#define ev_malloc(size) ev_realloc (0, (size))
351#define ev_free(ptr) ev_realloc ((ptr), 0) 1792#define ev_free(ptr) ev_realloc ((ptr), 0)
352 1793
353/*****************************************************************************/ 1794/*****************************************************************************/
354 1795
1796/* set in reify when reification needed */
1797#define EV_ANFD_REIFY 1
1798
1799/* file descriptor info structure */
355typedef struct 1800typedef struct
356{ 1801{
357 WL head; 1802 WL head;
358 unsigned char events; 1803 unsigned char events; /* the events watched for */
1804 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
1805 unsigned char emask; /* some backends store the actual kernel mask in here */
359 unsigned char reify; 1806 unsigned char unused;
1807#if EV_USE_EPOLL
1808 unsigned int egen; /* generation counter to counter epoll bugs */
1809#endif
360#if EV_SELECT_IS_WINSOCKET 1810#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
361 SOCKET handle; 1811 SOCKET handle;
362#endif 1812#endif
1813#if EV_USE_IOCP
1814 OVERLAPPED or, ow;
1815#endif
363} ANFD; 1816} ANFD;
364 1817
1818/* stores the pending event set for a given watcher */
365typedef struct 1819typedef struct
366{ 1820{
367 W w; 1821 W w;
368 int events; 1822 int events; /* the pending event set for the given watcher */
369} ANPENDING; 1823} ANPENDING;
370 1824
371#if EV_USE_INOTIFY 1825#if EV_USE_INOTIFY
1826/* hash table entry per inotify-id */
372typedef struct 1827typedef struct
373{ 1828{
374 WL head; 1829 WL head;
375} ANFS; 1830} ANFS;
1831#endif
1832
1833/* Heap Entry */
1834#if EV_HEAP_CACHE_AT
1835 /* a heap element */
1836 typedef struct {
1837 ev_tstamp at;
1838 WT w;
1839 } ANHE;
1840
1841 #define ANHE_w(he) (he).w /* access watcher, read-write */
1842 #define ANHE_at(he) (he).at /* access cached at, read-only */
1843 #define ANHE_at_cache(he) (he).at = (he).w->at /* update at from watcher */
1844#else
1845 /* a heap element */
1846 typedef WT ANHE;
1847
1848 #define ANHE_w(he) (he)
1849 #define ANHE_at(he) (he)->at
1850 #define ANHE_at_cache(he)
376#endif 1851#endif
377 1852
378#if EV_MULTIPLICITY 1853#if EV_MULTIPLICITY
379 1854
380 struct ev_loop 1855 struct ev_loop
… …
386 #undef VAR 1861 #undef VAR
387 }; 1862 };
388 #include "ev_wrap.h" 1863 #include "ev_wrap.h"
389 1864
390 static struct ev_loop default_loop_struct; 1865 static struct ev_loop default_loop_struct;
391 struct ev_loop *ev_default_loop_ptr; 1866 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
392 1867
393#else 1868#else
394 1869
395 ev_tstamp ev_rt_now; 1870 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
396 #define VAR(name,decl) static decl; 1871 #define VAR(name,decl) static decl;
397 #include "ev_vars.h" 1872 #include "ev_vars.h"
398 #undef VAR 1873 #undef VAR
399 1874
400 static int ev_default_loop_ptr; 1875 static int ev_default_loop_ptr;
401 1876
402#endif 1877#endif
403 1878
1879#if EV_FEATURE_API
1880# define EV_RELEASE_CB if (expect_false (release_cb)) release_cb (EV_A)
1881# define EV_ACQUIRE_CB if (expect_false (acquire_cb)) acquire_cb (EV_A)
1882# define EV_INVOKE_PENDING invoke_cb (EV_A)
1883#else
1884# define EV_RELEASE_CB (void)0
1885# define EV_ACQUIRE_CB (void)0
1886# define EV_INVOKE_PENDING ev_invoke_pending (EV_A)
1887#endif
1888
1889#define EVBREAK_RECURSE 0x80
1890
404/*****************************************************************************/ 1891/*****************************************************************************/
405 1892
1893#ifndef EV_HAVE_EV_TIME
406ev_tstamp 1894ev_tstamp
407ev_time (void) 1895ev_time (void) EV_NOEXCEPT
408{ 1896{
409#if EV_USE_REALTIME 1897#if EV_USE_REALTIME
1898 if (expect_true (have_realtime))
1899 {
410 struct timespec ts; 1900 struct timespec ts;
411 clock_gettime (CLOCK_REALTIME, &ts); 1901 clock_gettime (CLOCK_REALTIME, &ts);
412 return ts.tv_sec + ts.tv_nsec * 1e-9; 1902 return ts.tv_sec + ts.tv_nsec * 1e-9;
413#else 1903 }
1904#endif
1905
414 struct timeval tv; 1906 struct timeval tv;
415 gettimeofday (&tv, 0); 1907 gettimeofday (&tv, 0);
416 return tv.tv_sec + tv.tv_usec * 1e-6; 1908 return tv.tv_sec + tv.tv_usec * 1e-6;
417#endif
418} 1909}
1910#endif
419 1911
420ev_tstamp inline_size 1912inline_size ev_tstamp
421get_clock (void) 1913get_clock (void)
422{ 1914{
423#if EV_USE_MONOTONIC 1915#if EV_USE_MONOTONIC
424 if (expect_true (have_monotonic)) 1916 if (expect_true (have_monotonic))
425 { 1917 {
… …
432 return ev_time (); 1924 return ev_time ();
433} 1925}
434 1926
435#if EV_MULTIPLICITY 1927#if EV_MULTIPLICITY
436ev_tstamp 1928ev_tstamp
437ev_now (EV_P) 1929ev_now (EV_P) EV_NOEXCEPT
438{ 1930{
439 return ev_rt_now; 1931 return ev_rt_now;
440} 1932}
441#endif 1933#endif
442 1934
443void 1935void
444ev_sleep (ev_tstamp delay) 1936ev_sleep (ev_tstamp delay) EV_NOEXCEPT
445{ 1937{
446 if (delay > 0.) 1938 if (delay > 0.)
447 { 1939 {
448#if EV_USE_NANOSLEEP 1940#if EV_USE_NANOSLEEP
449 struct timespec ts; 1941 struct timespec ts;
450 1942
451 ts.tv_sec = (time_t)delay; 1943 EV_TS_SET (ts, delay);
452 ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
453
454 nanosleep (&ts, 0); 1944 nanosleep (&ts, 0);
455#elif defined(_WIN32) 1945#elif defined _WIN32
1946 /* maybe this should round up, as ms is very low resolution */
1947 /* compared to select (µs) or nanosleep (ns) */
456 Sleep (delay * 1e3); 1948 Sleep ((unsigned long)(delay * 1e3));
457#else 1949#else
458 struct timeval tv; 1950 struct timeval tv;
459 1951
460 tv.tv_sec = (time_t)delay; 1952 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
461 tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6); 1953 /* something not guaranteed by newer posix versions, but guaranteed */
462 1954 /* by older ones */
1955 EV_TV_SET (tv, delay);
463 select (0, 0, 0, 0, &tv); 1956 select (0, 0, 0, 0, &tv);
464#endif 1957#endif
465 } 1958 }
466} 1959}
467 1960
468/*****************************************************************************/ 1961/*****************************************************************************/
469 1962
470int inline_size 1963#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2**n and >> 4 longs */
1964
1965/* find a suitable new size for the given array, */
1966/* hopefully by rounding to a nice-to-malloc size */
1967inline_size int
471array_nextsize (int elem, int cur, int cnt) 1968array_nextsize (int elem, int cur, int cnt)
472{ 1969{
473 int ncur = cur + 1; 1970 int ncur = cur + 1;
474 1971
475 do 1972 do
476 ncur <<= 1; 1973 ncur <<= 1;
477 while (cnt > ncur); 1974 while (cnt > ncur);
478 1975
479 /* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */ 1976 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
480 if (elem * ncur > 4096) 1977 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
481 { 1978 {
482 ncur *= elem; 1979 ncur *= elem;
483 ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095; 1980 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
484 ncur = ncur - sizeof (void *) * 4; 1981 ncur = ncur - sizeof (void *) * 4;
485 ncur /= elem; 1982 ncur /= elem;
486 } 1983 }
487 1984
488 return ncur; 1985 return ncur;
489} 1986}
490 1987
491static noinline void * 1988noinline ecb_cold
1989static void *
492array_realloc (int elem, void *base, int *cur, int cnt) 1990array_realloc (int elem, void *base, int *cur, int cnt)
493{ 1991{
494 *cur = array_nextsize (elem, *cur, cnt); 1992 *cur = array_nextsize (elem, *cur, cnt);
495 return ev_realloc (base, elem * *cur); 1993 return ev_realloc (base, elem * *cur);
496} 1994}
1995
1996#define array_needsize_noinit(base,offset,count)
1997
1998#define array_needsize_zerofill(base,offset,count) \
1999 memset ((void *)(base + offset), 0, sizeof (*(base)) * (count))
497 2000
498#define array_needsize(type,base,cur,cnt,init) \ 2001#define array_needsize(type,base,cur,cnt,init) \
499 if (expect_false ((cnt) > (cur))) \ 2002 if (expect_false ((cnt) > (cur))) \
500 { \ 2003 { \
501 int ocur_ = (cur); \ 2004 ecb_unused int ocur_ = (cur); \
502 (base) = (type *)array_realloc \ 2005 (base) = (type *)array_realloc \
503 (sizeof (type), (base), &(cur), (cnt)); \ 2006 (sizeof (type), (base), &(cur), (cnt)); \
504 init ((base) + (ocur_), (cur) - ocur_); \ 2007 init ((base), ocur_, ((cur) - ocur_)); \
505 } 2008 }
506 2009
507#if 0 2010#if 0
508#define array_slim(type,stem) \ 2011#define array_slim(type,stem) \
509 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 2012 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
… …
513 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\ 2016 fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
514 } 2017 }
515#endif 2018#endif
516 2019
517#define array_free(stem, idx) \ 2020#define array_free(stem, idx) \
518 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; 2021 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
519 2022
520/*****************************************************************************/ 2023/*****************************************************************************/
521 2024
2025/* dummy callback for pending events */
522void noinline 2026noinline
2027static void
2028pendingcb (EV_P_ ev_prepare *w, int revents)
2029{
2030}
2031
2032noinline
2033void
523ev_feed_event (EV_P_ void *w, int revents) 2034ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
524{ 2035{
525 W w_ = (W)w; 2036 W w_ = (W)w;
526 int pri = ABSPRI (w_); 2037 int pri = ABSPRI (w_);
527 2038
528 if (expect_false (w_->pending)) 2039 if (expect_false (w_->pending))
529 pendings [pri][w_->pending - 1].events |= revents; 2040 pendings [pri][w_->pending - 1].events |= revents;
530 else 2041 else
531 { 2042 {
532 w_->pending = ++pendingcnt [pri]; 2043 w_->pending = ++pendingcnt [pri];
533 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2044 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
534 pendings [pri][w_->pending - 1].w = w_; 2045 pendings [pri][w_->pending - 1].w = w_;
535 pendings [pri][w_->pending - 1].events = revents; 2046 pendings [pri][w_->pending - 1].events = revents;
536 } 2047 }
537}
538 2048
539void inline_speed 2049 pendingpri = NUMPRI - 1;
2050}
2051
2052inline_speed void
2053feed_reverse (EV_P_ W w)
2054{
2055 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
2056 rfeeds [rfeedcnt++] = w;
2057}
2058
2059inline_size void
2060feed_reverse_done (EV_P_ int revents)
2061{
2062 do
2063 ev_feed_event (EV_A_ rfeeds [--rfeedcnt], revents);
2064 while (rfeedcnt);
2065}
2066
2067inline_speed void
540queue_events (EV_P_ W *events, int eventcnt, int type) 2068queue_events (EV_P_ W *events, int eventcnt, int type)
541{ 2069{
542 int i; 2070 int i;
543 2071
544 for (i = 0; i < eventcnt; ++i) 2072 for (i = 0; i < eventcnt; ++i)
545 ev_feed_event (EV_A_ events [i], type); 2073 ev_feed_event (EV_A_ events [i], type);
546} 2074}
547 2075
548/*****************************************************************************/ 2076/*****************************************************************************/
549 2077
550void inline_size 2078inline_speed void
551anfds_init (ANFD *base, int count)
552{
553 while (count--)
554 {
555 base->head = 0;
556 base->events = EV_NONE;
557 base->reify = 0;
558
559 ++base;
560 }
561}
562
563void inline_speed
564fd_event (EV_P_ int fd, int revents) 2079fd_event_nocheck (EV_P_ int fd, int revents)
565{ 2080{
566 ANFD *anfd = anfds + fd; 2081 ANFD *anfd = anfds + fd;
567 ev_io *w; 2082 ev_io *w;
568 2083
569 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2084 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
573 if (ev) 2088 if (ev)
574 ev_feed_event (EV_A_ (W)w, ev); 2089 ev_feed_event (EV_A_ (W)w, ev);
575 } 2090 }
576} 2091}
577 2092
578void 2093/* do not submit kernel events for fds that have reify set */
2094/* because that means they changed while we were polling for new events */
2095inline_speed void
579ev_feed_fd_event (EV_P_ int fd, int revents) 2096fd_event (EV_P_ int fd, int revents)
2097{
2098 ANFD *anfd = anfds + fd;
2099
2100 if (expect_true (!anfd->reify))
2101 fd_event_nocheck (EV_A_ fd, revents);
2102}
2103
2104void
2105ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
580{ 2106{
581 if (fd >= 0 && fd < anfdmax) 2107 if (fd >= 0 && fd < anfdmax)
582 fd_event (EV_A_ fd, revents); 2108 fd_event_nocheck (EV_A_ fd, revents);
583} 2109}
584 2110
585void inline_size 2111/* make sure the external fd watch events are in-sync */
2112/* with the kernel/libev internal state */
2113inline_size void
586fd_reify (EV_P) 2114fd_reify (EV_P)
587{ 2115{
588 int i; 2116 int i;
2117
2118#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2119 for (i = 0; i < fdchangecnt; ++i)
2120 {
2121 int fd = fdchanges [i];
2122 ANFD *anfd = anfds + fd;
2123
2124 if (anfd->reify & EV__IOFDSET && anfd->head)
2125 {
2126 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2127
2128 if (handle != anfd->handle)
2129 {
2130 unsigned long arg;
2131
2132 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2133
2134 /* handle changed, but fd didn't - we need to do it in two steps */
2135 backend_modify (EV_A_ fd, anfd->events, 0);
2136 anfd->events = 0;
2137 anfd->handle = handle;
2138 }
2139 }
2140 }
2141#endif
589 2142
590 for (i = 0; i < fdchangecnt; ++i) 2143 for (i = 0; i < fdchangecnt; ++i)
591 { 2144 {
592 int fd = fdchanges [i]; 2145 int fd = fdchanges [i];
593 ANFD *anfd = anfds + fd; 2146 ANFD *anfd = anfds + fd;
594 ev_io *w; 2147 ev_io *w;
595 2148
596 unsigned char events = 0; 2149 unsigned char o_events = anfd->events;
2150 unsigned char o_reify = anfd->reify;
597 2151
598 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2152 anfd->reify = 0;
599 events |= (unsigned char)w->events;
600 2153
601#if EV_SELECT_IS_WINSOCKET 2154 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
602 if (events)
603 { 2155 {
604 unsigned long argp; 2156 anfd->events = 0;
605 #ifdef EV_FD_TO_WIN32_HANDLE 2157
606 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd); 2158 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
607 #else 2159 anfd->events |= (unsigned char)w->events;
608 anfd->handle = _get_osfhandle (fd); 2160
609 #endif 2161 if (o_events != anfd->events)
610 assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0)); 2162 o_reify = EV__IOFDSET; /* actually |= */
611 } 2163 }
612#endif
613 2164
614 { 2165 if (o_reify & EV__IOFDSET)
615 unsigned char o_events = anfd->events;
616 unsigned char o_reify = anfd->reify;
617
618 anfd->reify = 0;
619 anfd->events = events;
620
621 if (o_events != events || o_reify & EV_IOFDSET)
622 backend_modify (EV_A_ fd, o_events, events); 2166 backend_modify (EV_A_ fd, o_events, anfd->events);
623 }
624 } 2167 }
625 2168
626 fdchangecnt = 0; 2169 fdchangecnt = 0;
627} 2170}
628 2171
2172/* something about the given fd changed */
629void inline_size 2173inline_size
2174void
630fd_change (EV_P_ int fd, int flags) 2175fd_change (EV_P_ int fd, int flags)
631{ 2176{
632 unsigned char reify = anfds [fd].reify; 2177 unsigned char reify = anfds [fd].reify;
633 anfds [fd].reify |= flags; 2178 anfds [fd].reify |= flags;
634 2179
635 if (expect_true (!reify)) 2180 if (expect_true (!reify))
636 { 2181 {
637 ++fdchangecnt; 2182 ++fdchangecnt;
638 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2183 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
639 fdchanges [fdchangecnt - 1] = fd; 2184 fdchanges [fdchangecnt - 1] = fd;
640 } 2185 }
641} 2186}
642 2187
643void inline_speed 2188/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
2189inline_speed ecb_cold void
644fd_kill (EV_P_ int fd) 2190fd_kill (EV_P_ int fd)
645{ 2191{
646 ev_io *w; 2192 ev_io *w;
647 2193
648 while ((w = (ev_io *)anfds [fd].head)) 2194 while ((w = (ev_io *)anfds [fd].head))
… …
650 ev_io_stop (EV_A_ w); 2196 ev_io_stop (EV_A_ w);
651 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2197 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
652 } 2198 }
653} 2199}
654 2200
655int inline_size 2201/* check whether the given fd is actually valid, for error recovery */
2202inline_size ecb_cold int
656fd_valid (int fd) 2203fd_valid (int fd)
657{ 2204{
658#ifdef _WIN32 2205#ifdef _WIN32
659 return _get_osfhandle (fd) != -1; 2206 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
660#else 2207#else
661 return fcntl (fd, F_GETFD) != -1; 2208 return fcntl (fd, F_GETFD) != -1;
662#endif 2209#endif
663} 2210}
664 2211
665/* called on EBADF to verify fds */ 2212/* called on EBADF to verify fds */
666static void noinline 2213noinline ecb_cold
2214static void
667fd_ebadf (EV_P) 2215fd_ebadf (EV_P)
668{ 2216{
669 int fd; 2217 int fd;
670 2218
671 for (fd = 0; fd < anfdmax; ++fd) 2219 for (fd = 0; fd < anfdmax; ++fd)
672 if (anfds [fd].events) 2220 if (anfds [fd].events)
673 if (!fd_valid (fd) == -1 && errno == EBADF) 2221 if (!fd_valid (fd) && errno == EBADF)
674 fd_kill (EV_A_ fd); 2222 fd_kill (EV_A_ fd);
675} 2223}
676 2224
677/* called on ENOMEM in select/poll to kill some fds and retry */ 2225/* called on ENOMEM in select/poll to kill some fds and retry */
678static void noinline 2226noinline ecb_cold
2227static void
679fd_enomem (EV_P) 2228fd_enomem (EV_P)
680{ 2229{
681 int fd; 2230 int fd;
682 2231
683 for (fd = anfdmax; fd--; ) 2232 for (fd = anfdmax; fd--; )
684 if (anfds [fd].events) 2233 if (anfds [fd].events)
685 { 2234 {
686 fd_kill (EV_A_ fd); 2235 fd_kill (EV_A_ fd);
687 return; 2236 break;
688 } 2237 }
689} 2238}
690 2239
691/* usually called after fork if backend needs to re-arm all fds from scratch */ 2240/* usually called after fork if backend needs to re-arm all fds from scratch */
692static void noinline 2241noinline
2242static void
693fd_rearm_all (EV_P) 2243fd_rearm_all (EV_P)
694{ 2244{
695 int fd; 2245 int fd;
696 2246
697 for (fd = 0; fd < anfdmax; ++fd) 2247 for (fd = 0; fd < anfdmax; ++fd)
698 if (anfds [fd].events) 2248 if (anfds [fd].events)
699 { 2249 {
700 anfds [fd].events = 0; 2250 anfds [fd].events = 0;
2251 anfds [fd].emask = 0;
701 fd_change (EV_A_ fd, EV_IOFDSET | 1); 2252 fd_change (EV_A_ fd, EV__IOFDSET | EV_ANFD_REIFY);
702 } 2253 }
703} 2254}
704 2255
705/*****************************************************************************/ 2256/* used to prepare libev internal fd's */
706 2257/* this is not fork-safe */
707void inline_speed 2258inline_speed void
708upheap (WT *heap, int k)
709{
710 WT w = heap [k];
711
712 while (k)
713 {
714 int p = (k - 1) >> 1;
715
716 if (heap [p]->at <= w->at)
717 break;
718
719 heap [k] = heap [p];
720 ((W)heap [k])->active = k + 1;
721 k = p;
722 }
723
724 heap [k] = w;
725 ((W)heap [k])->active = k + 1;
726}
727
728void inline_speed
729downheap (WT *heap, int N, int k)
730{
731 WT w = heap [k];
732
733 for (;;)
734 {
735 int c = (k << 1) + 1;
736
737 if (c >= N)
738 break;
739
740 c += c + 1 < N && heap [c]->at > heap [c + 1]->at
741 ? 1 : 0;
742
743 if (w->at <= heap [c]->at)
744 break;
745
746 heap [k] = heap [c];
747 ((W)heap [k])->active = k + 1;
748
749 k = c;
750 }
751
752 heap [k] = w;
753 ((W)heap [k])->active = k + 1;
754}
755
756void inline_size
757adjustheap (WT *heap, int N, int k)
758{
759 upheap (heap, k);
760 downheap (heap, N, k);
761}
762
763/*****************************************************************************/
764
765typedef struct
766{
767 WL head;
768 sig_atomic_t volatile gotsig;
769} ANSIG;
770
771static ANSIG *signals;
772static int signalmax;
773
774static int sigpipe [2];
775static sig_atomic_t volatile gotsig;
776static ev_io sigev;
777
778void inline_size
779signals_init (ANSIG *base, int count)
780{
781 while (count--)
782 {
783 base->head = 0;
784 base->gotsig = 0;
785
786 ++base;
787 }
788}
789
790static void
791sighandler (int signum)
792{
793#if _WIN32
794 signal (signum, sighandler);
795#endif
796
797 signals [signum - 1].gotsig = 1;
798
799 if (!gotsig)
800 {
801 int old_errno = errno;
802 gotsig = 1;
803 write (sigpipe [1], &signum, 1);
804 errno = old_errno;
805 }
806}
807
808void noinline
809ev_feed_signal_event (EV_P_ int signum)
810{
811 WL w;
812
813#if EV_MULTIPLICITY
814 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
815#endif
816
817 --signum;
818
819 if (signum < 0 || signum >= signalmax)
820 return;
821
822 signals [signum].gotsig = 0;
823
824 for (w = signals [signum].head; w; w = w->next)
825 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
826}
827
828static void
829sigcb (EV_P_ ev_io *iow, int revents)
830{
831 int signum;
832
833 read (sigpipe [0], &revents, 1);
834 gotsig = 0;
835
836 for (signum = signalmax; signum--; )
837 if (signals [signum].gotsig)
838 ev_feed_signal_event (EV_A_ signum + 1);
839}
840
841void inline_speed
842fd_intern (int fd) 2259fd_intern (int fd)
843{ 2260{
844#ifdef _WIN32 2261#ifdef _WIN32
845 int arg = 1; 2262 unsigned long arg = 1;
846 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg); 2263 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
847#else 2264#else
848 fcntl (fd, F_SETFD, FD_CLOEXEC); 2265 fcntl (fd, F_SETFD, FD_CLOEXEC);
849 fcntl (fd, F_SETFL, O_NONBLOCK); 2266 fcntl (fd, F_SETFL, O_NONBLOCK);
850#endif 2267#endif
851} 2268}
852 2269
853static void noinline
854siginit (EV_P)
855{
856 fd_intern (sigpipe [0]);
857 fd_intern (sigpipe [1]);
858
859 ev_io_set (&sigev, sigpipe [0], EV_READ);
860 ev_io_start (EV_A_ &sigev);
861 ev_unref (EV_A); /* child watcher should not keep loop alive */
862}
863
864/*****************************************************************************/ 2270/*****************************************************************************/
865 2271
2272/*
2273 * the heap functions want a real array index. array index 0 is guaranteed to not
2274 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
2275 * the branching factor of the d-tree.
2276 */
2277
2278/*
2279 * at the moment we allow libev the luxury of two heaps,
2280 * a small-code-size 2-heap one and a ~1.5kb larger 4-heap
2281 * which is more cache-efficient.
2282 * the difference is about 5% with 50000+ watchers.
2283 */
2284#if EV_USE_4HEAP
2285
2286#define DHEAP 4
2287#define HEAP0 (DHEAP - 1) /* index of first element in heap */
2288#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
2289#define UPHEAP_DONE(p,k) ((p) == (k))
2290
2291/* away from the root */
2292inline_speed void
2293downheap (ANHE *heap, int N, int k)
2294{
2295 ANHE he = heap [k];
2296 ANHE *E = heap + N + HEAP0;
2297
2298 for (;;)
2299 {
2300 ev_tstamp minat;
2301 ANHE *minpos;
2302 ANHE *pos = heap + DHEAP * (k - HEAP0) + HEAP0 + 1;
2303
2304 /* find minimum child */
2305 if (expect_true (pos + DHEAP - 1 < E))
2306 {
2307 /* fast path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2308 if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2309 if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2310 if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2311 }
2312 else if (pos < E)
2313 {
2314 /* slow path */ (minpos = pos + 0), (minat = ANHE_at (*minpos));
2315 if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
2316 if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
2317 if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
2318 }
2319 else
2320 break;
2321
2322 if (ANHE_at (he) <= minat)
2323 break;
2324
2325 heap [k] = *minpos;
2326 ev_active (ANHE_w (*minpos)) = k;
2327
2328 k = minpos - heap;
2329 }
2330
2331 heap [k] = he;
2332 ev_active (ANHE_w (he)) = k;
2333}
2334
2335#else /* 4HEAP */
2336
2337#define HEAP0 1
2338#define HPARENT(k) ((k) >> 1)
2339#define UPHEAP_DONE(p,k) (!(p))
2340
2341/* away from the root */
2342inline_speed void
2343downheap (ANHE *heap, int N, int k)
2344{
2345 ANHE he = heap [k];
2346
2347 for (;;)
2348 {
2349 int c = k << 1;
2350
2351 if (c >= N + HEAP0)
2352 break;
2353
2354 c += c + 1 < N + HEAP0 && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
2355 ? 1 : 0;
2356
2357 if (ANHE_at (he) <= ANHE_at (heap [c]))
2358 break;
2359
2360 heap [k] = heap [c];
2361 ev_active (ANHE_w (heap [k])) = k;
2362
2363 k = c;
2364 }
2365
2366 heap [k] = he;
2367 ev_active (ANHE_w (he)) = k;
2368}
2369#endif
2370
2371/* towards the root */
2372inline_speed void
2373upheap (ANHE *heap, int k)
2374{
2375 ANHE he = heap [k];
2376
2377 for (;;)
2378 {
2379 int p = HPARENT (k);
2380
2381 if (UPHEAP_DONE (p, k) || ANHE_at (heap [p]) <= ANHE_at (he))
2382 break;
2383
2384 heap [k] = heap [p];
2385 ev_active (ANHE_w (heap [k])) = k;
2386 k = p;
2387 }
2388
2389 heap [k] = he;
2390 ev_active (ANHE_w (he)) = k;
2391}
2392
2393/* move an element suitably so it is in a correct place */
2394inline_size void
2395adjustheap (ANHE *heap, int N, int k)
2396{
2397 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
2398 upheap (heap, k);
2399 else
2400 downheap (heap, N, k);
2401}
2402
2403/* rebuild the heap: this function is used only once and executed rarely */
2404inline_size void
2405reheap (ANHE *heap, int N)
2406{
2407 int i;
2408
2409 /* we don't use floyds algorithm, upheap is simpler and is more cache-efficient */
2410 /* also, this is easy to implement and correct for both 2-heaps and 4-heaps */
2411 for (i = 0; i < N; ++i)
2412 upheap (heap, i + HEAP0);
2413}
2414
2415/*****************************************************************************/
2416
2417/* associate signal watchers to a signal signal */
2418typedef struct
2419{
2420 EV_ATOMIC_T pending;
2421#if EV_MULTIPLICITY
2422 EV_P;
2423#endif
2424 WL head;
2425} ANSIG;
2426
2427static ANSIG signals [EV_NSIG - 1];
2428
2429/*****************************************************************************/
2430
2431#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
2432
2433noinline ecb_cold
2434static void
2435evpipe_init (EV_P)
2436{
2437 if (!ev_is_active (&pipe_w))
2438 {
2439 int fds [2];
2440
2441# if EV_USE_EVENTFD
2442 fds [0] = -1;
2443 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
2444 if (fds [1] < 0 && errno == EINVAL)
2445 fds [1] = eventfd (0, 0);
2446
2447 if (fds [1] < 0)
2448# endif
2449 {
2450 while (pipe (fds))
2451 ev_syserr ("(libev) error creating signal/async pipe");
2452
2453 fd_intern (fds [0]);
2454 }
2455
2456 evpipe [0] = fds [0];
2457
2458 if (evpipe [1] < 0)
2459 evpipe [1] = fds [1]; /* first call, set write fd */
2460 else
2461 {
2462 /* on subsequent calls, do not change evpipe [1] */
2463 /* so that evpipe_write can always rely on its value. */
2464 /* this branch does not do anything sensible on windows, */
2465 /* so must not be executed on windows */
2466
2467 dup2 (fds [1], evpipe [1]);
2468 close (fds [1]);
2469 }
2470
2471 fd_intern (evpipe [1]);
2472
2473 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2474 ev_io_start (EV_A_ &pipe_w);
2475 ev_unref (EV_A); /* watcher should not keep loop alive */
2476 }
2477}
2478
2479inline_speed void
2480evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2481{
2482 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2483
2484 if (expect_true (*flag))
2485 return;
2486
2487 *flag = 1;
2488 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2489
2490 pipe_write_skipped = 1;
2491
2492 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2493
2494 if (pipe_write_wanted)
2495 {
2496 int old_errno;
2497
2498 pipe_write_skipped = 0;
2499 ECB_MEMORY_FENCE_RELEASE;
2500
2501 old_errno = errno; /* save errno because write will clobber it */
2502
2503#if EV_USE_EVENTFD
2504 if (evpipe [0] < 0)
2505 {
2506 uint64_t counter = 1;
2507 write (evpipe [1], &counter, sizeof (uint64_t));
2508 }
2509 else
2510#endif
2511 {
2512#ifdef _WIN32
2513 WSABUF buf;
2514 DWORD sent;
2515 buf.buf = (char *)&buf;
2516 buf.len = 1;
2517 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2518#else
2519 write (evpipe [1], &(evpipe [1]), 1);
2520#endif
2521 }
2522
2523 errno = old_errno;
2524 }
2525}
2526
2527/* called whenever the libev signal pipe */
2528/* got some events (signal, async) */
2529static void
2530pipecb (EV_P_ ev_io *iow, int revents)
2531{
2532 int i;
2533
2534 if (revents & EV_READ)
2535 {
2536#if EV_USE_EVENTFD
2537 if (evpipe [0] < 0)
2538 {
2539 uint64_t counter;
2540 read (evpipe [1], &counter, sizeof (uint64_t));
2541 }
2542 else
2543#endif
2544 {
2545 char dummy[4];
2546#ifdef _WIN32
2547 WSABUF buf;
2548 DWORD recvd;
2549 DWORD flags = 0;
2550 buf.buf = dummy;
2551 buf.len = sizeof (dummy);
2552 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2553#else
2554 read (evpipe [0], &dummy, sizeof (dummy));
2555#endif
2556 }
2557 }
2558
2559 pipe_write_skipped = 0;
2560
2561 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2562
2563#if EV_SIGNAL_ENABLE
2564 if (sig_pending)
2565 {
2566 sig_pending = 0;
2567
2568 ECB_MEMORY_FENCE;
2569
2570 for (i = EV_NSIG - 1; i--; )
2571 if (expect_false (signals [i].pending))
2572 ev_feed_signal_event (EV_A_ i + 1);
2573 }
2574#endif
2575
2576#if EV_ASYNC_ENABLE
2577 if (async_pending)
2578 {
2579 async_pending = 0;
2580
2581 ECB_MEMORY_FENCE;
2582
2583 for (i = asynccnt; i--; )
2584 if (asyncs [i]->sent)
2585 {
2586 asyncs [i]->sent = 0;
2587 ECB_MEMORY_FENCE_RELEASE;
2588 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
2589 }
2590 }
2591#endif
2592}
2593
2594/*****************************************************************************/
2595
2596void
2597ev_feed_signal (int signum) EV_NOEXCEPT
2598{
2599#if EV_MULTIPLICITY
2600 EV_P;
2601 ECB_MEMORY_FENCE_ACQUIRE;
2602 EV_A = signals [signum - 1].loop;
2603
2604 if (!EV_A)
2605 return;
2606#endif
2607
2608 signals [signum - 1].pending = 1;
2609 evpipe_write (EV_A_ &sig_pending);
2610}
2611
2612static void
2613ev_sighandler (int signum)
2614{
2615#ifdef _WIN32
2616 signal (signum, ev_sighandler);
2617#endif
2618
2619 ev_feed_signal (signum);
2620}
2621
2622noinline
2623void
2624ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
2625{
2626 WL w;
2627
2628 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2629 return;
2630
2631 --signum;
2632
2633#if EV_MULTIPLICITY
2634 /* it is permissible to try to feed a signal to the wrong loop */
2635 /* or, likely more useful, feeding a signal nobody is waiting for */
2636
2637 if (expect_false (signals [signum].loop != EV_A))
2638 return;
2639#endif
2640
2641 signals [signum].pending = 0;
2642 ECB_MEMORY_FENCE_RELEASE;
2643
2644 for (w = signals [signum].head; w; w = w->next)
2645 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
2646}
2647
2648#if EV_USE_SIGNALFD
2649static void
2650sigfdcb (EV_P_ ev_io *iow, int revents)
2651{
2652 struct signalfd_siginfo si[2], *sip; /* these structs are big */
2653
2654 for (;;)
2655 {
2656 ssize_t res = read (sigfd, si, sizeof (si));
2657
2658 /* not ISO-C, as res might be -1, but works with SuS */
2659 for (sip = si; (char *)sip < (char *)si + res; ++sip)
2660 ev_feed_signal_event (EV_A_ sip->ssi_signo);
2661
2662 if (res < (ssize_t)sizeof (si))
2663 break;
2664 }
2665}
2666#endif
2667
2668#endif
2669
2670/*****************************************************************************/
2671
2672#if EV_CHILD_ENABLE
866static WL childs [EV_PID_HASHSIZE]; 2673static WL childs [EV_PID_HASHSIZE];
867 2674
868#ifndef _WIN32
869
870static ev_signal childev; 2675static ev_signal childev;
871 2676
872void inline_speed 2677#ifndef WIFCONTINUED
2678# define WIFCONTINUED(status) 0
2679#endif
2680
2681/* handle a single child status event */
2682inline_speed void
873child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status) 2683child_reap (EV_P_ int chain, int pid, int status)
874{ 2684{
875 ev_child *w; 2685 ev_child *w;
2686 int traced = WIFSTOPPED (status) || WIFCONTINUED (status);
876 2687
877 for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next) 2688 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
2689 {
878 if (w->pid == pid || !w->pid) 2690 if ((w->pid == pid || !w->pid)
2691 && (!traced || (w->flags & 1)))
879 { 2692 {
880 ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */ 2693 ev_set_priority (w, EV_MAXPRI); /* need to do it *now*, this *must* be the same prio as the signal watcher itself */
881 w->rpid = pid; 2694 w->rpid = pid;
882 w->rstatus = status; 2695 w->rstatus = status;
883 ev_feed_event (EV_A_ (W)w, EV_CHILD); 2696 ev_feed_event (EV_A_ (W)w, EV_CHILD);
884 } 2697 }
2698 }
885} 2699}
886 2700
887#ifndef WCONTINUED 2701#ifndef WCONTINUED
888# define WCONTINUED 0 2702# define WCONTINUED 0
889#endif 2703#endif
890 2704
2705/* called on sigchld etc., calls waitpid */
891static void 2706static void
892childcb (EV_P_ ev_signal *sw, int revents) 2707childcb (EV_P_ ev_signal *sw, int revents)
893{ 2708{
894 int pid, status; 2709 int pid, status;
895 2710
… …
898 if (!WCONTINUED 2713 if (!WCONTINUED
899 || errno != EINVAL 2714 || errno != EINVAL
900 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED))) 2715 || 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
901 return; 2716 return;
902 2717
903 /* make sure we are called again until all childs have been reaped */ 2718 /* make sure we are called again until all children have been reaped */
904 /* we need to do it this way so that the callback gets called before we continue */ 2719 /* we need to do it this way so that the callback gets called before we continue */
905 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL); 2720 ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
906 2721
907 child_reap (EV_A_ sw, pid, pid, status); 2722 child_reap (EV_A_ pid, pid, status);
908 if (EV_PID_HASHSIZE > 1) 2723 if ((EV_PID_HASHSIZE) > 1)
909 child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */ 2724 child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
910} 2725}
911 2726
912#endif 2727#endif
913 2728
914/*****************************************************************************/ 2729/*****************************************************************************/
915 2730
2731#if EV_USE_IOCP
2732# include "ev_iocp.c"
2733#endif
916#if EV_USE_PORT 2734#if EV_USE_PORT
917# include "ev_port.c" 2735# include "ev_port.c"
918#endif 2736#endif
919#if EV_USE_KQUEUE 2737#if EV_USE_KQUEUE
920# include "ev_kqueue.c" 2738# include "ev_kqueue.c"
921#endif 2739#endif
922#if EV_USE_EPOLL 2740#if EV_USE_EPOLL
923# include "ev_epoll.c" 2741# include "ev_epoll.c"
924#endif 2742#endif
2743#if EV_USE_LINUXAIO
2744# include "ev_linuxaio.c"
2745#endif
925#if EV_USE_POLL 2746#if EV_USE_POLL
926# include "ev_poll.c" 2747# include "ev_poll.c"
927#endif 2748#endif
928#if EV_USE_SELECT 2749#if EV_USE_SELECT
929# include "ev_select.c" 2750# include "ev_select.c"
930#endif 2751#endif
931 2752
932int 2753ecb_cold int
933ev_version_major (void) 2754ev_version_major (void) EV_NOEXCEPT
934{ 2755{
935 return EV_VERSION_MAJOR; 2756 return EV_VERSION_MAJOR;
936} 2757}
937 2758
938int 2759ecb_cold int
939ev_version_minor (void) 2760ev_version_minor (void) EV_NOEXCEPT
940{ 2761{
941 return EV_VERSION_MINOR; 2762 return EV_VERSION_MINOR;
942} 2763}
943 2764
944/* return true if we are running with elevated privileges and should ignore env variables */ 2765/* return true if we are running with elevated privileges and should ignore env variables */
945int inline_size 2766inline_size ecb_cold int
946enable_secure (void) 2767enable_secure (void)
947{ 2768{
948#ifdef _WIN32 2769#ifdef _WIN32
949 return 0; 2770 return 0;
950#else 2771#else
951 return getuid () != geteuid () 2772 return getuid () != geteuid ()
952 || getgid () != getegid (); 2773 || getgid () != getegid ();
953#endif 2774#endif
954} 2775}
955 2776
2777ecb_cold
956unsigned int 2778unsigned int
957ev_supported_backends (void) 2779ev_supported_backends (void) EV_NOEXCEPT
958{ 2780{
959 unsigned int flags = 0; 2781 unsigned int flags = 0;
960 2782
961 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2783 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
962 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2784 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
963 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 2785 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2786 if (EV_USE_LINUXAIO) flags |= EVBACKEND_LINUXAIO;
964 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 2787 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
965 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2788 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
966 2789
967 return flags; 2790 return flags;
968} 2791}
969 2792
2793ecb_cold
970unsigned int 2794unsigned int
971ev_recommended_backends (void) 2795ev_recommended_backends (void) EV_NOEXCEPT
972{ 2796{
973 unsigned int flags = ev_supported_backends (); 2797 unsigned int flags = ev_supported_backends ();
974 2798
975#ifndef __NetBSD__ 2799#ifndef __NetBSD__
976 /* kqueue is borked on everything but netbsd apparently */ 2800 /* kqueue is borked on everything but netbsd apparently */
977 /* it usually doesn't work correctly on anything but sockets and pipes */ 2801 /* it usually doesn't work correctly on anything but sockets and pipes */
978 flags &= ~EVBACKEND_KQUEUE; 2802 flags &= ~EVBACKEND_KQUEUE;
979#endif 2803#endif
980#ifdef __APPLE__ 2804#ifdef __APPLE__
981 // flags &= ~EVBACKEND_KQUEUE; for documentation 2805 /* only select works correctly on that "unix-certified" platform */
2806 flags &= ~EVBACKEND_KQUEUE; /* horribly broken, even for sockets */
2807 flags &= ~EVBACKEND_POLL; /* poll is based on kqueue from 10.5 onwards */
2808#endif
2809#ifdef __FreeBSD__
2810 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
2811#endif
2812
2813 /* TODO: linuxaio is very experimental */
2814#if !EV_RECOMMEND_LINUXAIO
982 flags &= ~EVBACKEND_POLL; 2815 flags &= ~EVBACKEND_LINUXAIO;
983#endif 2816#endif
984 2817
985 return flags; 2818 return flags;
986} 2819}
987 2820
2821ecb_cold
988unsigned int 2822unsigned int
989ev_embeddable_backends (void) 2823ev_embeddable_backends (void) EV_NOEXCEPT
990{ 2824{
991 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2825 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
992 2826
993 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2827 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
994 /* please fix it and tell me how to detect the fix */ 2828 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
995 flags &= ~EVBACKEND_EPOLL; 2829 flags &= ~EVBACKEND_EPOLL;
996 2830
997 return flags; 2831 return flags;
998} 2832}
999 2833
1000unsigned int 2834unsigned int
1001ev_backend (EV_P) 2835ev_backend (EV_P) EV_NOEXCEPT
1002{ 2836{
1003 return backend; 2837 return backend;
1004} 2838}
1005 2839
2840#if EV_FEATURE_API
1006unsigned int 2841unsigned int
1007ev_loop_count (EV_P) 2842ev_iteration (EV_P) EV_NOEXCEPT
1008{ 2843{
1009 return loop_count; 2844 return loop_count;
1010} 2845}
1011 2846
2847unsigned int
2848ev_depth (EV_P) EV_NOEXCEPT
2849{
2850 return loop_depth;
2851}
2852
1012void 2853void
1013ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2854ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1014{ 2855{
1015 io_blocktime = interval; 2856 io_blocktime = interval;
1016} 2857}
1017 2858
1018void 2859void
1019ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2860ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1020{ 2861{
1021 timeout_blocktime = interval; 2862 timeout_blocktime = interval;
1022} 2863}
1023 2864
1024static void noinline 2865void
2866ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
2867{
2868 userdata = data;
2869}
2870
2871void *
2872ev_userdata (EV_P) EV_NOEXCEPT
2873{
2874 return userdata;
2875}
2876
2877void
2878ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
2879{
2880 invoke_cb = invoke_pending_cb;
2881}
2882
2883void
2884ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
2885{
2886 release_cb = release;
2887 acquire_cb = acquire;
2888}
2889#endif
2890
2891/* initialise a loop structure, must be zero-initialised */
2892noinline ecb_cold
2893static void
1025loop_init (EV_P_ unsigned int flags) 2894loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1026{ 2895{
1027 if (!backend) 2896 if (!backend)
1028 { 2897 {
2898 origflags = flags;
2899
2900#if EV_USE_REALTIME
2901 if (!have_realtime)
2902 {
2903 struct timespec ts;
2904
2905 if (!clock_gettime (CLOCK_REALTIME, &ts))
2906 have_realtime = 1;
2907 }
2908#endif
2909
1029#if EV_USE_MONOTONIC 2910#if EV_USE_MONOTONIC
2911 if (!have_monotonic)
1030 { 2912 {
1031 struct timespec ts; 2913 struct timespec ts;
2914
1032 if (!clock_gettime (CLOCK_MONOTONIC, &ts)) 2915 if (!clock_gettime (CLOCK_MONOTONIC, &ts))
1033 have_monotonic = 1; 2916 have_monotonic = 1;
1034 } 2917 }
1035#endif 2918#endif
1036
1037 ev_rt_now = ev_time ();
1038 mn_now = get_clock ();
1039 now_floor = mn_now;
1040 rtmn_diff = ev_rt_now - mn_now;
1041
1042 io_blocktime = 0.;
1043 timeout_blocktime = 0.;
1044 2919
1045 /* pid check not overridable via env */ 2920 /* pid check not overridable via env */
1046#ifndef _WIN32 2921#ifndef _WIN32
1047 if (flags & EVFLAG_FORKCHECK) 2922 if (flags & EVFLAG_FORKCHECK)
1048 curpid = getpid (); 2923 curpid = getpid ();
… …
1051 if (!(flags & EVFLAG_NOENV) 2926 if (!(flags & EVFLAG_NOENV)
1052 && !enable_secure () 2927 && !enable_secure ()
1053 && getenv ("LIBEV_FLAGS")) 2928 && getenv ("LIBEV_FLAGS"))
1054 flags = atoi (getenv ("LIBEV_FLAGS")); 2929 flags = atoi (getenv ("LIBEV_FLAGS"));
1055 2930
1056 if (!(flags & 0x0000ffffUL)) 2931 ev_rt_now = ev_time ();
2932 mn_now = get_clock ();
2933 now_floor = mn_now;
2934 rtmn_diff = ev_rt_now - mn_now;
2935#if EV_FEATURE_API
2936 invoke_cb = ev_invoke_pending;
2937#endif
2938
2939 io_blocktime = 0.;
2940 timeout_blocktime = 0.;
2941 backend = 0;
2942 backend_fd = -1;
2943 sig_pending = 0;
2944#if EV_ASYNC_ENABLE
2945 async_pending = 0;
2946#endif
2947 pipe_write_skipped = 0;
2948 pipe_write_wanted = 0;
2949 evpipe [0] = -1;
2950 evpipe [1] = -1;
2951#if EV_USE_INOTIFY
2952 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
2953#endif
2954#if EV_USE_SIGNALFD
2955 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
2956#endif
2957
2958 if (!(flags & EVBACKEND_MASK))
1057 flags |= ev_recommended_backends (); 2959 flags |= ev_recommended_backends ();
1058 2960
1059 backend = 0;
1060 backend_fd = -1;
1061#if EV_USE_INOTIFY 2961#if EV_USE_IOCP
1062 fs_fd = -2; 2962 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1063#endif 2963#endif
1064
1065#if EV_USE_PORT 2964#if EV_USE_PORT
1066 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2965 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1067#endif 2966#endif
1068#if EV_USE_KQUEUE 2967#if EV_USE_KQUEUE
1069 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2968 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
2969#endif
2970#if EV_USE_LINUXAIO
2971 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
1070#endif 2972#endif
1071#if EV_USE_EPOLL 2973#if EV_USE_EPOLL
1072 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 2974 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1073#endif 2975#endif
1074#if EV_USE_POLL 2976#if EV_USE_POLL
1075 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 2977 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1076#endif 2978#endif
1077#if EV_USE_SELECT 2979#if EV_USE_SELECT
1078 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2980 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1079#endif 2981#endif
1080 2982
2983 ev_prepare_init (&pending_w, pendingcb);
2984
2985#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1081 ev_init (&sigev, sigcb); 2986 ev_init (&pipe_w, pipecb);
1082 ev_set_priority (&sigev, EV_MAXPRI); 2987 ev_set_priority (&pipe_w, EV_MAXPRI);
2988#endif
1083 } 2989 }
1084} 2990}
1085 2991
1086static void noinline 2992/* free up a loop structure */
2993ecb_cold
2994void
1087loop_destroy (EV_P) 2995ev_loop_destroy (EV_P)
1088{ 2996{
1089 int i; 2997 int i;
2998
2999#if EV_MULTIPLICITY
3000 /* mimic free (0) */
3001 if (!EV_A)
3002 return;
3003#endif
3004
3005#if EV_CLEANUP_ENABLE
3006 /* queue cleanup watchers (and execute them) */
3007 if (expect_false (cleanupcnt))
3008 {
3009 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
3010 EV_INVOKE_PENDING;
3011 }
3012#endif
3013
3014#if EV_CHILD_ENABLE
3015 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
3016 {
3017 ev_ref (EV_A); /* child watcher */
3018 ev_signal_stop (EV_A_ &childev);
3019 }
3020#endif
3021
3022 if (ev_is_active (&pipe_w))
3023 {
3024 /*ev_ref (EV_A);*/
3025 /*ev_io_stop (EV_A_ &pipe_w);*/
3026
3027 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
3028 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
3029 }
3030
3031#if EV_USE_SIGNALFD
3032 if (ev_is_active (&sigfd_w))
3033 close (sigfd);
3034#endif
1090 3035
1091#if EV_USE_INOTIFY 3036#if EV_USE_INOTIFY
1092 if (fs_fd >= 0) 3037 if (fs_fd >= 0)
1093 close (fs_fd); 3038 close (fs_fd);
1094#endif 3039#endif
1095 3040
1096 if (backend_fd >= 0) 3041 if (backend_fd >= 0)
1097 close (backend_fd); 3042 close (backend_fd);
1098 3043
3044#if EV_USE_IOCP
3045 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
3046#endif
1099#if EV_USE_PORT 3047#if EV_USE_PORT
1100 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3048 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1101#endif 3049#endif
1102#if EV_USE_KQUEUE 3050#if EV_USE_KQUEUE
1103 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3051 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3052#endif
3053#if EV_USE_LINUXAIO
3054 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
1104#endif 3055#endif
1105#if EV_USE_EPOLL 3056#if EV_USE_EPOLL
1106 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3057 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1107#endif 3058#endif
1108#if EV_USE_POLL 3059#if EV_USE_POLL
1109 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3060 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1110#endif 3061#endif
1111#if EV_USE_SELECT 3062#if EV_USE_SELECT
1112 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3063 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1113#endif 3064#endif
1114 3065
1115 for (i = NUMPRI; i--; ) 3066 for (i = NUMPRI; i--; )
1116 { 3067 {
1117 array_free (pending, [i]); 3068 array_free (pending, [i]);
1118#if EV_IDLE_ENABLE 3069#if EV_IDLE_ENABLE
1119 array_free (idle, [i]); 3070 array_free (idle, [i]);
1120#endif 3071#endif
1121 } 3072 }
1122 3073
1123 ev_free (anfds); anfdmax = 0; 3074 ev_free (anfds); anfds = 0; anfdmax = 0;
1124 3075
1125 /* have to use the microsoft-never-gets-it-right macro */ 3076 /* have to use the microsoft-never-gets-it-right macro */
3077 array_free (rfeed, EMPTY);
1126 array_free (fdchange, EMPTY); 3078 array_free (fdchange, EMPTY);
1127 array_free (timer, EMPTY); 3079 array_free (timer, EMPTY);
1128#if EV_PERIODIC_ENABLE 3080#if EV_PERIODIC_ENABLE
1129 array_free (periodic, EMPTY); 3081 array_free (periodic, EMPTY);
1130#endif 3082#endif
1131#if EV_FORK_ENABLE 3083#if EV_FORK_ENABLE
1132 array_free (fork, EMPTY); 3084 array_free (fork, EMPTY);
1133#endif 3085#endif
3086#if EV_CLEANUP_ENABLE
3087 array_free (cleanup, EMPTY);
3088#endif
1134 array_free (prepare, EMPTY); 3089 array_free (prepare, EMPTY);
1135 array_free (check, EMPTY); 3090 array_free (check, EMPTY);
3091#if EV_ASYNC_ENABLE
3092 array_free (async, EMPTY);
3093#endif
1136 3094
1137 backend = 0; 3095 backend = 0;
1138}
1139 3096
3097#if EV_MULTIPLICITY
3098 if (ev_is_default_loop (EV_A))
3099#endif
3100 ev_default_loop_ptr = 0;
3101#if EV_MULTIPLICITY
3102 else
3103 ev_free (EV_A);
3104#endif
3105}
3106
3107#if EV_USE_INOTIFY
1140void inline_size infy_fork (EV_P); 3108inline_size void infy_fork (EV_P);
3109#endif
1141 3110
1142void inline_size 3111inline_size void
1143loop_fork (EV_P) 3112loop_fork (EV_P)
1144{ 3113{
1145#if EV_USE_PORT 3114#if EV_USE_PORT
1146 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3115 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1147#endif 3116#endif
1148#if EV_USE_KQUEUE 3117#if EV_USE_KQUEUE
1149 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 3118 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3119#endif
3120#if EV_USE_LINUXAIO
3121 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
1150#endif 3122#endif
1151#if EV_USE_EPOLL 3123#if EV_USE_EPOLL
1152 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3124 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1153#endif 3125#endif
1154#if EV_USE_INOTIFY 3126#if EV_USE_INOTIFY
1155 infy_fork (EV_A); 3127 infy_fork (EV_A);
1156#endif 3128#endif
1157 3129
1158 if (ev_is_active (&sigev)) 3130#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
3131 if (ev_is_active (&pipe_w) && postfork != 2)
1159 { 3132 {
1160 /* default loop */ 3133 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1161 3134
1162 ev_ref (EV_A); 3135 ev_ref (EV_A);
1163 ev_io_stop (EV_A_ &sigev); 3136 ev_io_stop (EV_A_ &pipe_w);
1164 close (sigpipe [0]);
1165 close (sigpipe [1]);
1166 3137
1167 while (pipe (sigpipe)) 3138 if (evpipe [0] >= 0)
1168 syserr ("(libev) error creating pipe"); 3139 EV_WIN32_CLOSE_FD (evpipe [0]);
1169 3140
1170 siginit (EV_A); 3141 evpipe_init (EV_A);
3142 /* iterate over everything, in case we missed something before */
3143 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1171 } 3144 }
3145#endif
1172 3146
1173 postfork = 0; 3147 postfork = 0;
1174} 3148}
1175 3149
1176#if EV_MULTIPLICITY 3150#if EV_MULTIPLICITY
3151
3152ecb_cold
1177struct ev_loop * 3153struct ev_loop *
1178ev_loop_new (unsigned int flags) 3154ev_loop_new (unsigned int flags) EV_NOEXCEPT
1179{ 3155{
1180 struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3156 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1181 3157
1182 memset (loop, 0, sizeof (struct ev_loop)); 3158 memset (EV_A, 0, sizeof (struct ev_loop));
1183
1184 loop_init (EV_A_ flags); 3159 loop_init (EV_A_ flags);
1185 3160
1186 if (ev_backend (EV_A)) 3161 if (ev_backend (EV_A))
1187 return loop; 3162 return EV_A;
1188 3163
3164 ev_free (EV_A);
1189 return 0; 3165 return 0;
1190} 3166}
1191 3167
1192void 3168#endif /* multiplicity */
1193ev_loop_destroy (EV_P)
1194{
1195 loop_destroy (EV_A);
1196 ev_free (loop);
1197}
1198 3169
1199void 3170#if EV_VERIFY
1200ev_loop_fork (EV_P) 3171noinline ecb_cold
3172static void
3173verify_watcher (EV_P_ W w)
1201{ 3174{
1202 postfork = 1; 3175 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1203}
1204 3176
3177 if (w->pending)
3178 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
3179}
3180
3181noinline ecb_cold
3182static void
3183verify_heap (EV_P_ ANHE *heap, int N)
3184{
3185 int i;
3186
3187 for (i = HEAP0; i < N + HEAP0; ++i)
3188 {
3189 assert (("libev: active index mismatch in heap", ev_active (ANHE_w (heap [i])) == i));
3190 assert (("libev: heap condition violated", i == HEAP0 || ANHE_at (heap [HPARENT (i)]) <= ANHE_at (heap [i])));
3191 assert (("libev: heap at cache mismatch", ANHE_at (heap [i]) == ev_at (ANHE_w (heap [i]))));
3192
3193 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
3194 }
3195}
3196
3197noinline ecb_cold
3198static void
3199array_verify (EV_P_ W *ws, int cnt)
3200{
3201 while (cnt--)
3202 {
3203 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
3204 verify_watcher (EV_A_ ws [cnt]);
3205 }
3206}
3207#endif
3208
3209#if EV_FEATURE_API
3210void ecb_cold
3211ev_verify (EV_P) EV_NOEXCEPT
3212{
3213#if EV_VERIFY
3214 int i;
3215 WL w, w2;
3216
3217 assert (activecnt >= -1);
3218
3219 assert (fdchangemax >= fdchangecnt);
3220 for (i = 0; i < fdchangecnt; ++i)
3221 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
3222
3223 assert (anfdmax >= 0);
3224 for (i = 0; i < anfdmax; ++i)
3225 {
3226 int j = 0;
3227
3228 for (w = w2 = anfds [i].head; w; w = w->next)
3229 {
3230 verify_watcher (EV_A_ (W)w);
3231
3232 if (j++ & 1)
3233 {
3234 assert (("libev: io watcher list contains a loop", w != w2));
3235 w2 = w2->next;
3236 }
3237
3238 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
3239 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
3240 }
3241 }
3242
3243 assert (timermax >= timercnt);
3244 verify_heap (EV_A_ timers, timercnt);
3245
3246#if EV_PERIODIC_ENABLE
3247 assert (periodicmax >= periodiccnt);
3248 verify_heap (EV_A_ periodics, periodiccnt);
3249#endif
3250
3251 for (i = NUMPRI; i--; )
3252 {
3253 assert (pendingmax [i] >= pendingcnt [i]);
3254#if EV_IDLE_ENABLE
3255 assert (idleall >= 0);
3256 assert (idlemax [i] >= idlecnt [i]);
3257 array_verify (EV_A_ (W *)idles [i], idlecnt [i]);
3258#endif
3259 }
3260
3261#if EV_FORK_ENABLE
3262 assert (forkmax >= forkcnt);
3263 array_verify (EV_A_ (W *)forks, forkcnt);
3264#endif
3265
3266#if EV_CLEANUP_ENABLE
3267 assert (cleanupmax >= cleanupcnt);
3268 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3269#endif
3270
3271#if EV_ASYNC_ENABLE
3272 assert (asyncmax >= asynccnt);
3273 array_verify (EV_A_ (W *)asyncs, asynccnt);
3274#endif
3275
3276#if EV_PREPARE_ENABLE
3277 assert (preparemax >= preparecnt);
3278 array_verify (EV_A_ (W *)prepares, preparecnt);
3279#endif
3280
3281#if EV_CHECK_ENABLE
3282 assert (checkmax >= checkcnt);
3283 array_verify (EV_A_ (W *)checks, checkcnt);
3284#endif
3285
3286# if 0
3287#if EV_CHILD_ENABLE
3288 for (w = (ev_child *)childs [chain & ((EV_PID_HASHSIZE) - 1)]; w; w = (ev_child *)((WL)w)->next)
3289 for (signum = EV_NSIG; signum--; ) if (signals [signum].pending)
3290#endif
3291# endif
3292#endif
3293}
1205#endif 3294#endif
1206 3295
1207#if EV_MULTIPLICITY 3296#if EV_MULTIPLICITY
3297ecb_cold
1208struct ev_loop * 3298struct ev_loop *
1209ev_default_loop_init (unsigned int flags)
1210#else 3299#else
1211int 3300int
3301#endif
1212ev_default_loop (unsigned int flags) 3302ev_default_loop (unsigned int flags) EV_NOEXCEPT
1213#endif
1214{ 3303{
1215 if (sigpipe [0] == sigpipe [1])
1216 if (pipe (sigpipe))
1217 return 0;
1218
1219 if (!ev_default_loop_ptr) 3304 if (!ev_default_loop_ptr)
1220 { 3305 {
1221#if EV_MULTIPLICITY 3306#if EV_MULTIPLICITY
1222 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 3307 EV_P = ev_default_loop_ptr = &default_loop_struct;
1223#else 3308#else
1224 ev_default_loop_ptr = 1; 3309 ev_default_loop_ptr = 1;
1225#endif 3310#endif
1226 3311
1227 loop_init (EV_A_ flags); 3312 loop_init (EV_A_ flags);
1228 3313
1229 if (ev_backend (EV_A)) 3314 if (ev_backend (EV_A))
1230 { 3315 {
1231 siginit (EV_A); 3316#if EV_CHILD_ENABLE
1232
1233#ifndef _WIN32
1234 ev_signal_init (&childev, childcb, SIGCHLD); 3317 ev_signal_init (&childev, childcb, SIGCHLD);
1235 ev_set_priority (&childev, EV_MAXPRI); 3318 ev_set_priority (&childev, EV_MAXPRI);
1236 ev_signal_start (EV_A_ &childev); 3319 ev_signal_start (EV_A_ &childev);
1237 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3320 ev_unref (EV_A); /* child watcher should not keep loop alive */
1238#endif 3321#endif
… …
1243 3326
1244 return ev_default_loop_ptr; 3327 return ev_default_loop_ptr;
1245} 3328}
1246 3329
1247void 3330void
1248ev_default_destroy (void) 3331ev_loop_fork (EV_P) EV_NOEXCEPT
1249{ 3332{
1250#if EV_MULTIPLICITY
1251 struct ev_loop *loop = ev_default_loop_ptr;
1252#endif
1253
1254#ifndef _WIN32
1255 ev_ref (EV_A); /* child watcher */
1256 ev_signal_stop (EV_A_ &childev);
1257#endif
1258
1259 ev_ref (EV_A); /* signal watcher */
1260 ev_io_stop (EV_A_ &sigev);
1261
1262 close (sigpipe [0]); sigpipe [0] = 0;
1263 close (sigpipe [1]); sigpipe [1] = 0;
1264
1265 loop_destroy (EV_A);
1266}
1267
1268void
1269ev_default_fork (void)
1270{
1271#if EV_MULTIPLICITY
1272 struct ev_loop *loop = ev_default_loop_ptr;
1273#endif
1274
1275 if (backend)
1276 postfork = 1; 3333 postfork = 1;
1277} 3334}
1278 3335
1279/*****************************************************************************/ 3336/*****************************************************************************/
1280 3337
1281void 3338void
1282ev_invoke (EV_P_ void *w, int revents) 3339ev_invoke (EV_P_ void *w, int revents)
1283{ 3340{
1284 EV_CB_INVOKE ((W)w, revents); 3341 EV_CB_INVOKE ((W)w, revents);
1285} 3342}
1286 3343
1287void inline_speed 3344unsigned int
1288call_pending (EV_P) 3345ev_pending_count (EV_P) EV_NOEXCEPT
1289{ 3346{
1290 int pri; 3347 int pri;
3348 unsigned int count = 0;
1291 3349
1292 for (pri = NUMPRI; pri--; ) 3350 for (pri = NUMPRI; pri--; )
3351 count += pendingcnt [pri];
3352
3353 return count;
3354}
3355
3356noinline
3357void
3358ev_invoke_pending (EV_P)
3359{
3360 pendingpri = NUMPRI;
3361
3362 do
3363 {
3364 --pendingpri;
3365
3366 /* pendingpri possibly gets modified in the inner loop */
1293 while (pendingcnt [pri]) 3367 while (pendingcnt [pendingpri])
1294 {
1295 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1296
1297 if (expect_true (p->w))
1298 {
1299 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1300
1301 p->w->pending = 0;
1302 EV_CB_INVOKE (p->w, p->events);
1303 }
1304 }
1305}
1306
1307void inline_size
1308timers_reify (EV_P)
1309{
1310 while (timercnt && ((WT)timers [0])->at <= mn_now)
1311 {
1312 ev_timer *w = (ev_timer *)timers [0];
1313
1314 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1315
1316 /* first reschedule or stop timer */
1317 if (w->repeat)
1318 { 3368 {
1319 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3369 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1320 3370
1321 ((WT)w)->at += w->repeat; 3371 p->w->pending = 0;
1322 if (((WT)w)->at < mn_now) 3372 EV_CB_INVOKE (p->w, p->events);
1323 ((WT)w)->at = mn_now; 3373 EV_FREQUENT_CHECK;
1324
1325 downheap (timers, timercnt, 0);
1326 } 3374 }
1327 else
1328 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1329
1330 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1331 }
1332}
1333
1334#if EV_PERIODIC_ENABLE
1335void inline_size
1336periodics_reify (EV_P)
1337{
1338 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1339 { 3375 }
1340 ev_periodic *w = (ev_periodic *)periodics [0]; 3376 while (pendingpri);
1341
1342 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1343
1344 /* first reschedule or stop timer */
1345 if (w->reschedule_cb)
1346 {
1347 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1348 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1349 downheap (periodics, periodiccnt, 0);
1350 }
1351 else if (w->interval)
1352 {
1353 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1354 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1355 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1356 downheap (periodics, periodiccnt, 0);
1357 }
1358 else
1359 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1360
1361 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1362 }
1363} 3377}
1364
1365static void noinline
1366periodics_reschedule (EV_P)
1367{
1368 int i;
1369
1370 /* adjust periodics after time jump */
1371 for (i = 0; i < periodiccnt; ++i)
1372 {
1373 ev_periodic *w = (ev_periodic *)periodics [i];
1374
1375 if (w->reschedule_cb)
1376 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1377 else if (w->interval)
1378 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1379 }
1380
1381 /* now rebuild the heap */
1382 for (i = periodiccnt >> 1; i--; )
1383 downheap (periodics, periodiccnt, i);
1384}
1385#endif
1386 3378
1387#if EV_IDLE_ENABLE 3379#if EV_IDLE_ENABLE
1388void inline_size 3380/* make idle watchers pending. this handles the "call-idle */
3381/* only when higher priorities are idle" logic */
3382inline_size void
1389idle_reify (EV_P) 3383idle_reify (EV_P)
1390{ 3384{
1391 if (expect_false (idleall)) 3385 if (expect_false (idleall))
1392 { 3386 {
1393 int pri; 3387 int pri;
… …
1405 } 3399 }
1406 } 3400 }
1407} 3401}
1408#endif 3402#endif
1409 3403
1410void inline_speed 3404/* make timers pending */
3405inline_size void
3406timers_reify (EV_P)
3407{
3408 EV_FREQUENT_CHECK;
3409
3410 if (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
3411 {
3412 do
3413 {
3414 ev_timer *w = (ev_timer *)ANHE_w (timers [HEAP0]);
3415
3416 /*assert (("libev: inactive timer on timer heap detected", ev_is_active (w)));*/
3417
3418 /* first reschedule or stop timer */
3419 if (w->repeat)
3420 {
3421 ev_at (w) += w->repeat;
3422 if (ev_at (w) < mn_now)
3423 ev_at (w) = mn_now;
3424
3425 assert (("libev: negative ev_timer repeat value found while processing timers", w->repeat > 0.));
3426
3427 ANHE_at_cache (timers [HEAP0]);
3428 downheap (timers, timercnt, HEAP0);
3429 }
3430 else
3431 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
3432
3433 EV_FREQUENT_CHECK;
3434 feed_reverse (EV_A_ (W)w);
3435 }
3436 while (timercnt && ANHE_at (timers [HEAP0]) < mn_now);
3437
3438 feed_reverse_done (EV_A_ EV_TIMER);
3439 }
3440}
3441
3442#if EV_PERIODIC_ENABLE
3443
3444noinline
3445static void
3446periodic_recalc (EV_P_ ev_periodic *w)
3447{
3448 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3449 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3450
3451 /* the above almost always errs on the low side */
3452 while (at <= ev_rt_now)
3453 {
3454 ev_tstamp nat = at + w->interval;
3455
3456 /* when resolution fails us, we use ev_rt_now */
3457 if (expect_false (nat == at))
3458 {
3459 at = ev_rt_now;
3460 break;
3461 }
3462
3463 at = nat;
3464 }
3465
3466 ev_at (w) = at;
3467}
3468
3469/* make periodics pending */
3470inline_size void
3471periodics_reify (EV_P)
3472{
3473 EV_FREQUENT_CHECK;
3474
3475 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
3476 {
3477 do
3478 {
3479 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
3480
3481 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
3482
3483 /* first reschedule or stop timer */
3484 if (w->reschedule_cb)
3485 {
3486 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3487
3488 assert (("libev: ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
3489
3490 ANHE_at_cache (periodics [HEAP0]);
3491 downheap (periodics, periodiccnt, HEAP0);
3492 }
3493 else if (w->interval)
3494 {
3495 periodic_recalc (EV_A_ w);
3496 ANHE_at_cache (periodics [HEAP0]);
3497 downheap (periodics, periodiccnt, HEAP0);
3498 }
3499 else
3500 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
3501
3502 EV_FREQUENT_CHECK;
3503 feed_reverse (EV_A_ (W)w);
3504 }
3505 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now);
3506
3507 feed_reverse_done (EV_A_ EV_PERIODIC);
3508 }
3509}
3510
3511/* simply recalculate all periodics */
3512/* TODO: maybe ensure that at least one event happens when jumping forward? */
3513noinline ecb_cold
3514static void
3515periodics_reschedule (EV_P)
3516{
3517 int i;
3518
3519 /* adjust periodics after time jump */
3520 for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
3521 {
3522 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
3523
3524 if (w->reschedule_cb)
3525 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
3526 else if (w->interval)
3527 periodic_recalc (EV_A_ w);
3528
3529 ANHE_at_cache (periodics [i]);
3530 }
3531
3532 reheap (periodics, periodiccnt);
3533}
3534#endif
3535
3536/* adjust all timers by a given offset */
3537noinline ecb_cold
3538static void
3539timers_reschedule (EV_P_ ev_tstamp adjust)
3540{
3541 int i;
3542
3543 for (i = 0; i < timercnt; ++i)
3544 {
3545 ANHE *he = timers + i + HEAP0;
3546 ANHE_w (*he)->at += adjust;
3547 ANHE_at_cache (*he);
3548 }
3549}
3550
3551/* fetch new monotonic and realtime times from the kernel */
3552/* also detect if there was a timejump, and act accordingly */
3553inline_speed void
1411time_update (EV_P_ ev_tstamp max_block) 3554time_update (EV_P_ ev_tstamp max_block)
1412{ 3555{
1413 int i;
1414
1415#if EV_USE_MONOTONIC 3556#if EV_USE_MONOTONIC
1416 if (expect_true (have_monotonic)) 3557 if (expect_true (have_monotonic))
1417 { 3558 {
3559 int i;
1418 ev_tstamp odiff = rtmn_diff; 3560 ev_tstamp odiff = rtmn_diff;
1419 3561
1420 mn_now = get_clock (); 3562 mn_now = get_clock ();
1421 3563
1422 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3564 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1438 * doesn't hurt either as we only do this on time-jumps or 3580 * doesn't hurt either as we only do this on time-jumps or
1439 * in the unlikely event of having been preempted here. 3581 * in the unlikely event of having been preempted here.
1440 */ 3582 */
1441 for (i = 4; --i; ) 3583 for (i = 4; --i; )
1442 { 3584 {
3585 ev_tstamp diff;
1443 rtmn_diff = ev_rt_now - mn_now; 3586 rtmn_diff = ev_rt_now - mn_now;
1444 3587
1445 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 3588 diff = odiff - rtmn_diff;
3589
3590 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1446 return; /* all is well */ 3591 return; /* all is well */
1447 3592
1448 ev_rt_now = ev_time (); 3593 ev_rt_now = ev_time ();
1449 mn_now = get_clock (); 3594 mn_now = get_clock ();
1450 now_floor = mn_now; 3595 now_floor = mn_now;
1451 } 3596 }
1452 3597
3598 /* no timer adjustment, as the monotonic clock doesn't jump */
3599 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1453# if EV_PERIODIC_ENABLE 3600# if EV_PERIODIC_ENABLE
1454 periodics_reschedule (EV_A); 3601 periodics_reschedule (EV_A);
1455# endif 3602# endif
1456 /* no timer adjustment, as the monotonic clock doesn't jump */
1457 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1458 } 3603 }
1459 else 3604 else
1460#endif 3605#endif
1461 { 3606 {
1462 ev_rt_now = ev_time (); 3607 ev_rt_now = ev_time ();
1463 3608
1464 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP)) 3609 if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1465 { 3610 {
3611 /* adjust timers. this is easy, as the offset is the same for all of them */
3612 timers_reschedule (EV_A_ ev_rt_now - mn_now);
1466#if EV_PERIODIC_ENABLE 3613#if EV_PERIODIC_ENABLE
1467 periodics_reschedule (EV_A); 3614 periodics_reschedule (EV_A);
1468#endif 3615#endif
1469 /* adjust timers. this is easy, as the offset is the same for all of them */
1470 for (i = 0; i < timercnt; ++i)
1471 ((WT)timers [i])->at += ev_rt_now - mn_now;
1472 } 3616 }
1473 3617
1474 mn_now = ev_rt_now; 3618 mn_now = ev_rt_now;
1475 } 3619 }
1476} 3620}
1477 3621
1478void 3622int
1479ev_ref (EV_P)
1480{
1481 ++activecnt;
1482}
1483
1484void
1485ev_unref (EV_P)
1486{
1487 --activecnt;
1488}
1489
1490static int loop_done;
1491
1492void
1493ev_loop (EV_P_ int flags) 3623ev_run (EV_P_ int flags)
1494{ 3624{
1495 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 3625#if EV_FEATURE_API
1496 ? EVUNLOOP_ONE 3626 ++loop_depth;
1497 : EVUNLOOP_CANCEL; 3627#endif
1498 3628
3629 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3630
3631 loop_done = EVBREAK_CANCEL;
3632
1499 call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */ 3633 EV_INVOKE_PENDING; /* in case we recurse, ensure ordering stays nice and clean */
1500 3634
1501 do 3635 do
1502 { 3636 {
3637#if EV_VERIFY >= 2
3638 ev_verify (EV_A);
3639#endif
3640
1503#ifndef _WIN32 3641#ifndef _WIN32
1504 if (expect_false (curpid)) /* penalise the forking check even more */ 3642 if (expect_false (curpid)) /* penalise the forking check even more */
1505 if (expect_false (getpid () != curpid)) 3643 if (expect_false (getpid () != curpid))
1506 { 3644 {
1507 curpid = getpid (); 3645 curpid = getpid ();
… …
1513 /* we might have forked, so queue fork handlers */ 3651 /* we might have forked, so queue fork handlers */
1514 if (expect_false (postfork)) 3652 if (expect_false (postfork))
1515 if (forkcnt) 3653 if (forkcnt)
1516 { 3654 {
1517 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3655 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1518 call_pending (EV_A); 3656 EV_INVOKE_PENDING;
1519 } 3657 }
1520#endif 3658#endif
1521 3659
3660#if EV_PREPARE_ENABLE
1522 /* queue prepare watchers (and execute them) */ 3661 /* queue prepare watchers (and execute them) */
1523 if (expect_false (preparecnt)) 3662 if (expect_false (preparecnt))
1524 { 3663 {
1525 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3664 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1526 call_pending (EV_A); 3665 EV_INVOKE_PENDING;
1527 } 3666 }
3667#endif
1528 3668
1529 if (expect_false (!activecnt)) 3669 if (expect_false (loop_done))
1530 break; 3670 break;
1531 3671
1532 /* we might have forked, so reify kernel state if necessary */ 3672 /* we might have forked, so reify kernel state if necessary */
1533 if (expect_false (postfork)) 3673 if (expect_false (postfork))
1534 loop_fork (EV_A); 3674 loop_fork (EV_A);
… …
1539 /* calculate blocking time */ 3679 /* calculate blocking time */
1540 { 3680 {
1541 ev_tstamp waittime = 0.; 3681 ev_tstamp waittime = 0.;
1542 ev_tstamp sleeptime = 0.; 3682 ev_tstamp sleeptime = 0.;
1543 3683
3684 /* remember old timestamp for io_blocktime calculation */
3685 ev_tstamp prev_mn_now = mn_now;
3686
3687 /* update time to cancel out callback processing overhead */
3688 time_update (EV_A_ 1e100);
3689
3690 /* from now on, we want a pipe-wake-up */
3691 pipe_write_wanted = 1;
3692
3693 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3694
1544 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3695 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1545 { 3696 {
1546 /* update time to cancel out callback processing overhead */
1547 time_update (EV_A_ 1e100);
1548
1549 waittime = MAX_BLOCKTIME; 3697 waittime = MAX_BLOCKTIME;
1550 3698
1551 if (timercnt) 3699 if (timercnt)
1552 { 3700 {
1553 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 3701 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1554 if (waittime > to) waittime = to; 3702 if (waittime > to) waittime = to;
1555 } 3703 }
1556 3704
1557#if EV_PERIODIC_ENABLE 3705#if EV_PERIODIC_ENABLE
1558 if (periodiccnt) 3706 if (periodiccnt)
1559 { 3707 {
1560 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 3708 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1561 if (waittime > to) waittime = to; 3709 if (waittime > to) waittime = to;
1562 } 3710 }
1563#endif 3711#endif
1564 3712
3713 /* don't let timeouts decrease the waittime below timeout_blocktime */
1565 if (expect_false (waittime < timeout_blocktime)) 3714 if (expect_false (waittime < timeout_blocktime))
1566 waittime = timeout_blocktime; 3715 waittime = timeout_blocktime;
1567 3716
1568 sleeptime = waittime - backend_fudge; 3717 /* at this point, we NEED to wait, so we have to ensure */
3718 /* to pass a minimum nonzero value to the backend */
3719 if (expect_false (waittime < backend_mintime))
3720 waittime = backend_mintime;
1569 3721
3722 /* extra check because io_blocktime is commonly 0 */
1570 if (expect_true (sleeptime > io_blocktime)) 3723 if (expect_false (io_blocktime))
1571 sleeptime = io_blocktime;
1572
1573 if (sleeptime)
1574 { 3724 {
3725 sleeptime = io_blocktime - (mn_now - prev_mn_now);
3726
3727 if (sleeptime > waittime - backend_mintime)
3728 sleeptime = waittime - backend_mintime;
3729
3730 if (expect_true (sleeptime > 0.))
3731 {
1575 ev_sleep (sleeptime); 3732 ev_sleep (sleeptime);
1576 waittime -= sleeptime; 3733 waittime -= sleeptime;
3734 }
1577 } 3735 }
1578 } 3736 }
1579 3737
3738#if EV_FEATURE_API
1580 ++loop_count; 3739 ++loop_count;
3740#endif
3741 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1581 backend_poll (EV_A_ waittime); 3742 backend_poll (EV_A_ waittime);
3743 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
3744
3745 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3746
3747 ECB_MEMORY_FENCE_ACQUIRE;
3748 if (pipe_write_skipped)
3749 {
3750 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3751 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3752 }
1582 3753
1583 /* update ev_rt_now, do magic */ 3754 /* update ev_rt_now, do magic */
1584 time_update (EV_A_ waittime + sleeptime); 3755 time_update (EV_A_ waittime + sleeptime);
1585 } 3756 }
1586 3757
… …
1593#if EV_IDLE_ENABLE 3764#if EV_IDLE_ENABLE
1594 /* queue idle watchers unless other events are pending */ 3765 /* queue idle watchers unless other events are pending */
1595 idle_reify (EV_A); 3766 idle_reify (EV_A);
1596#endif 3767#endif
1597 3768
3769#if EV_CHECK_ENABLE
1598 /* queue check watchers, to be executed first */ 3770 /* queue check watchers, to be executed first */
1599 if (expect_false (checkcnt)) 3771 if (expect_false (checkcnt))
1600 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3772 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3773#endif
1601 3774
1602 call_pending (EV_A); 3775 EV_INVOKE_PENDING;
1603
1604 } 3776 }
1605 while (expect_true (activecnt && !loop_done)); 3777 while (expect_true (
3778 activecnt
3779 && !loop_done
3780 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3781 ));
1606 3782
1607 if (loop_done == EVUNLOOP_ONE) 3783 if (loop_done == EVBREAK_ONE)
1608 loop_done = EVUNLOOP_CANCEL; 3784 loop_done = EVBREAK_CANCEL;
1609}
1610 3785
3786#if EV_FEATURE_API
3787 --loop_depth;
3788#endif
3789
3790 return activecnt;
3791}
3792
1611void 3793void
1612ev_unloop (EV_P_ int how) 3794ev_break (EV_P_ int how) EV_NOEXCEPT
1613{ 3795{
1614 loop_done = how; 3796 loop_done = how;
1615} 3797}
1616 3798
3799void
3800ev_ref (EV_P) EV_NOEXCEPT
3801{
3802 ++activecnt;
3803}
3804
3805void
3806ev_unref (EV_P) EV_NOEXCEPT
3807{
3808 --activecnt;
3809}
3810
3811void
3812ev_now_update (EV_P) EV_NOEXCEPT
3813{
3814 time_update (EV_A_ 1e100);
3815}
3816
3817void
3818ev_suspend (EV_P) EV_NOEXCEPT
3819{
3820 ev_now_update (EV_A);
3821}
3822
3823void
3824ev_resume (EV_P) EV_NOEXCEPT
3825{
3826 ev_tstamp mn_prev = mn_now;
3827
3828 ev_now_update (EV_A);
3829 timers_reschedule (EV_A_ mn_now - mn_prev);
3830#if EV_PERIODIC_ENABLE
3831 /* TODO: really do this? */
3832 periodics_reschedule (EV_A);
3833#endif
3834}
3835
1617/*****************************************************************************/ 3836/*****************************************************************************/
3837/* singly-linked list management, used when the expected list length is short */
1618 3838
1619void inline_size 3839inline_size void
1620wlist_add (WL *head, WL elem) 3840wlist_add (WL *head, WL elem)
1621{ 3841{
1622 elem->next = *head; 3842 elem->next = *head;
1623 *head = elem; 3843 *head = elem;
1624} 3844}
1625 3845
1626void inline_size 3846inline_size void
1627wlist_del (WL *head, WL elem) 3847wlist_del (WL *head, WL elem)
1628{ 3848{
1629 while (*head) 3849 while (*head)
1630 { 3850 {
1631 if (*head == elem) 3851 if (expect_true (*head == elem))
1632 { 3852 {
1633 *head = elem->next; 3853 *head = elem->next;
1634 return; 3854 break;
1635 } 3855 }
1636 3856
1637 head = &(*head)->next; 3857 head = &(*head)->next;
1638 } 3858 }
1639} 3859}
1640 3860
1641void inline_speed 3861/* internal, faster, version of ev_clear_pending */
3862inline_speed void
1642clear_pending (EV_P_ W w) 3863clear_pending (EV_P_ W w)
1643{ 3864{
1644 if (w->pending) 3865 if (w->pending)
1645 { 3866 {
1646 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3867 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1647 w->pending = 0; 3868 w->pending = 0;
1648 } 3869 }
1649} 3870}
1650 3871
1651int 3872int
1652ev_clear_pending (EV_P_ void *w) 3873ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
1653{ 3874{
1654 W w_ = (W)w; 3875 W w_ = (W)w;
1655 int pending = w_->pending; 3876 int pending = w_->pending;
1656 3877
1657 if (expect_true (pending)) 3878 if (expect_true (pending))
1658 { 3879 {
1659 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 3880 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3881 p->w = (W)&pending_w;
1660 w_->pending = 0; 3882 w_->pending = 0;
1661 p->w = 0;
1662 return p->events; 3883 return p->events;
1663 } 3884 }
1664 else 3885 else
1665 return 0; 3886 return 0;
1666} 3887}
1667 3888
1668void inline_size 3889inline_size void
1669pri_adjust (EV_P_ W w) 3890pri_adjust (EV_P_ W w)
1670{ 3891{
1671 int pri = w->priority; 3892 int pri = ev_priority (w);
1672 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3893 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1673 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3894 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1674 w->priority = pri; 3895 ev_set_priority (w, pri);
1675} 3896}
1676 3897
1677void inline_speed 3898inline_speed void
1678ev_start (EV_P_ W w, int active) 3899ev_start (EV_P_ W w, int active)
1679{ 3900{
1680 pri_adjust (EV_A_ w); 3901 pri_adjust (EV_A_ w);
1681 w->active = active; 3902 w->active = active;
1682 ev_ref (EV_A); 3903 ev_ref (EV_A);
1683} 3904}
1684 3905
1685void inline_size 3906inline_size void
1686ev_stop (EV_P_ W w) 3907ev_stop (EV_P_ W w)
1687{ 3908{
1688 ev_unref (EV_A); 3909 ev_unref (EV_A);
1689 w->active = 0; 3910 w->active = 0;
1690} 3911}
1691 3912
1692/*****************************************************************************/ 3913/*****************************************************************************/
1693 3914
1694void noinline 3915noinline
3916void
1695ev_io_start (EV_P_ ev_io *w) 3917ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
1696{ 3918{
1697 int fd = w->fd; 3919 int fd = w->fd;
1698 3920
1699 if (expect_false (ev_is_active (w))) 3921 if (expect_false (ev_is_active (w)))
1700 return; 3922 return;
1701 3923
1702 assert (("ev_io_start called with negative fd", fd >= 0)); 3924 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3925 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3926
3927#if EV_VERIFY >= 2
3928 assert (("libev: ev_io_start called on watcher with invalid fd", fd_valid (fd)));
3929#endif
3930 EV_FREQUENT_CHECK;
1703 3931
1704 ev_start (EV_A_ (W)w, 1); 3932 ev_start (EV_A_ (W)w, 1);
1705 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3933 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
1706 wlist_add (&anfds[fd].head, (WL)w); 3934 wlist_add (&anfds[fd].head, (WL)w);
1707 3935
3936 /* common bug, apparently */
3937 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3938
1708 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 3939 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1709 w->events &= ~EV_IOFDSET; 3940 w->events &= ~EV__IOFDSET;
1710}
1711 3941
3942 EV_FREQUENT_CHECK;
3943}
3944
1712void noinline 3945noinline
3946void
1713ev_io_stop (EV_P_ ev_io *w) 3947ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
1714{ 3948{
1715 clear_pending (EV_A_ (W)w); 3949 clear_pending (EV_A_ (W)w);
1716 if (expect_false (!ev_is_active (w))) 3950 if (expect_false (!ev_is_active (w)))
1717 return; 3951 return;
1718 3952
1719 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3953 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3954
3955#if EV_VERIFY >= 2
3956 assert (("libev: ev_io_stop called on watcher with invalid fd", fd_valid (w->fd)));
3957#endif
3958 EV_FREQUENT_CHECK;
1720 3959
1721 wlist_del (&anfds[w->fd].head, (WL)w); 3960 wlist_del (&anfds[w->fd].head, (WL)w);
1722 ev_stop (EV_A_ (W)w); 3961 ev_stop (EV_A_ (W)w);
1723 3962
1724 fd_change (EV_A_ w->fd, 1); 3963 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1725}
1726 3964
3965 EV_FREQUENT_CHECK;
3966}
3967
1727void noinline 3968noinline
3969void
1728ev_timer_start (EV_P_ ev_timer *w) 3970ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
1729{ 3971{
1730 if (expect_false (ev_is_active (w))) 3972 if (expect_false (ev_is_active (w)))
1731 return; 3973 return;
1732 3974
1733 ((WT)w)->at += mn_now; 3975 ev_at (w) += mn_now;
1734 3976
1735 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3977 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1736 3978
3979 EV_FREQUENT_CHECK;
3980
3981 ++timercnt;
1737 ev_start (EV_A_ (W)w, ++timercnt); 3982 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1738 array_needsize (WT, timers, timermax, timercnt, EMPTY2); 3983 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
1739 timers [timercnt - 1] = (WT)w; 3984 ANHE_w (timers [ev_active (w)]) = (WT)w;
1740 upheap (timers, timercnt - 1); 3985 ANHE_at_cache (timers [ev_active (w)]);
3986 upheap (timers, ev_active (w));
1741 3987
3988 EV_FREQUENT_CHECK;
3989
1742 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 3990 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1743} 3991}
1744 3992
1745void noinline 3993noinline
3994void
1746ev_timer_stop (EV_P_ ev_timer *w) 3995ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
1747{ 3996{
1748 clear_pending (EV_A_ (W)w); 3997 clear_pending (EV_A_ (W)w);
1749 if (expect_false (!ev_is_active (w))) 3998 if (expect_false (!ev_is_active (w)))
1750 return; 3999 return;
1751 4000
1752 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w)); 4001 EV_FREQUENT_CHECK;
1753 4002
1754 { 4003 {
1755 int active = ((W)w)->active; 4004 int active = ev_active (w);
1756 4005
4006 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
4007
4008 --timercnt;
4009
1757 if (expect_true (--active < --timercnt)) 4010 if (expect_true (active < timercnt + HEAP0))
1758 { 4011 {
1759 timers [active] = timers [timercnt]; 4012 timers [active] = timers [timercnt + HEAP0];
1760 adjustheap (timers, timercnt, active); 4013 adjustheap (timers, timercnt, active);
1761 } 4014 }
1762 } 4015 }
1763 4016
1764 ((WT)w)->at -= mn_now; 4017 ev_at (w) -= mn_now;
1765 4018
1766 ev_stop (EV_A_ (W)w); 4019 ev_stop (EV_A_ (W)w);
1767}
1768 4020
4021 EV_FREQUENT_CHECK;
4022}
4023
1769void noinline 4024noinline
4025void
1770ev_timer_again (EV_P_ ev_timer *w) 4026ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
1771{ 4027{
4028 EV_FREQUENT_CHECK;
4029
4030 clear_pending (EV_A_ (W)w);
4031
1772 if (ev_is_active (w)) 4032 if (ev_is_active (w))
1773 { 4033 {
1774 if (w->repeat) 4034 if (w->repeat)
1775 { 4035 {
1776 ((WT)w)->at = mn_now + w->repeat; 4036 ev_at (w) = mn_now + w->repeat;
4037 ANHE_at_cache (timers [ev_active (w)]);
1777 adjustheap (timers, timercnt, ((W)w)->active - 1); 4038 adjustheap (timers, timercnt, ev_active (w));
1778 } 4039 }
1779 else 4040 else
1780 ev_timer_stop (EV_A_ w); 4041 ev_timer_stop (EV_A_ w);
1781 } 4042 }
1782 else if (w->repeat) 4043 else if (w->repeat)
1783 { 4044 {
1784 w->at = w->repeat; 4045 ev_at (w) = w->repeat;
1785 ev_timer_start (EV_A_ w); 4046 ev_timer_start (EV_A_ w);
1786 } 4047 }
4048
4049 EV_FREQUENT_CHECK;
4050}
4051
4052ev_tstamp
4053ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
4054{
4055 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1787} 4056}
1788 4057
1789#if EV_PERIODIC_ENABLE 4058#if EV_PERIODIC_ENABLE
1790void noinline 4059noinline
4060void
1791ev_periodic_start (EV_P_ ev_periodic *w) 4061ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
1792{ 4062{
1793 if (expect_false (ev_is_active (w))) 4063 if (expect_false (ev_is_active (w)))
1794 return; 4064 return;
1795 4065
1796 if (w->reschedule_cb) 4066 if (w->reschedule_cb)
1797 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 4067 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1798 else if (w->interval) 4068 else if (w->interval)
1799 { 4069 {
1800 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 4070 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1801 /* this formula differs from the one in periodic_reify because we do not always round up */ 4071 periodic_recalc (EV_A_ w);
1802 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1803 } 4072 }
1804 else 4073 else
1805 ((WT)w)->at = w->offset; 4074 ev_at (w) = w->offset;
1806 4075
4076 EV_FREQUENT_CHECK;
4077
4078 ++periodiccnt;
1807 ev_start (EV_A_ (W)w, ++periodiccnt); 4079 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1808 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2); 4080 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
1809 periodics [periodiccnt - 1] = (WT)w; 4081 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1810 upheap (periodics, periodiccnt - 1); 4082 ANHE_at_cache (periodics [ev_active (w)]);
4083 upheap (periodics, ev_active (w));
1811 4084
4085 EV_FREQUENT_CHECK;
4086
1812 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 4087 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1813} 4088}
1814 4089
1815void noinline 4090noinline
4091void
1816ev_periodic_stop (EV_P_ ev_periodic *w) 4092ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
1817{ 4093{
1818 clear_pending (EV_A_ (W)w); 4094 clear_pending (EV_A_ (W)w);
1819 if (expect_false (!ev_is_active (w))) 4095 if (expect_false (!ev_is_active (w)))
1820 return; 4096 return;
1821 4097
1822 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w)); 4098 EV_FREQUENT_CHECK;
1823 4099
1824 { 4100 {
1825 int active = ((W)w)->active; 4101 int active = ev_active (w);
1826 4102
4103 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
4104
4105 --periodiccnt;
4106
1827 if (expect_true (--active < --periodiccnt)) 4107 if (expect_true (active < periodiccnt + HEAP0))
1828 { 4108 {
1829 periodics [active] = periodics [periodiccnt]; 4109 periodics [active] = periodics [periodiccnt + HEAP0];
1830 adjustheap (periodics, periodiccnt, active); 4110 adjustheap (periodics, periodiccnt, active);
1831 } 4111 }
1832 } 4112 }
1833 4113
1834 ev_stop (EV_A_ (W)w); 4114 ev_stop (EV_A_ (W)w);
1835}
1836 4115
4116 EV_FREQUENT_CHECK;
4117}
4118
1837void noinline 4119noinline
4120void
1838ev_periodic_again (EV_P_ ev_periodic *w) 4121ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
1839{ 4122{
1840 /* TODO: use adjustheap and recalculation */ 4123 /* TODO: use adjustheap and recalculation */
1841 ev_periodic_stop (EV_A_ w); 4124 ev_periodic_stop (EV_A_ w);
1842 ev_periodic_start (EV_A_ w); 4125 ev_periodic_start (EV_A_ w);
1843} 4126}
… …
1845 4128
1846#ifndef SA_RESTART 4129#ifndef SA_RESTART
1847# define SA_RESTART 0 4130# define SA_RESTART 0
1848#endif 4131#endif
1849 4132
4133#if EV_SIGNAL_ENABLE
4134
1850void noinline 4135noinline
4136void
1851ev_signal_start (EV_P_ ev_signal *w) 4137ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
1852{ 4138{
1853#if EV_MULTIPLICITY
1854 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1855#endif
1856 if (expect_false (ev_is_active (w))) 4139 if (expect_false (ev_is_active (w)))
1857 return; 4140 return;
1858 4141
1859 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 4142 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
1860 4143
4144#if EV_MULTIPLICITY
4145 assert (("libev: a signal must not be attached to two different loops",
4146 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
4147
4148 signals [w->signum - 1].loop = EV_A;
4149 ECB_MEMORY_FENCE_RELEASE;
4150#endif
4151
4152 EV_FREQUENT_CHECK;
4153
4154#if EV_USE_SIGNALFD
4155 if (sigfd == -2)
1861 { 4156 {
1862#ifndef _WIN32 4157 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
1863 sigset_t full, prev; 4158 if (sigfd < 0 && errno == EINVAL)
1864 sigfillset (&full); 4159 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
1865 sigprocmask (SIG_SETMASK, &full, &prev);
1866#endif
1867 4160
1868 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 4161 if (sigfd >= 0)
4162 {
4163 fd_intern (sigfd); /* doing it twice will not hurt */
1869 4164
1870#ifndef _WIN32 4165 sigemptyset (&sigfd_set);
1871 sigprocmask (SIG_SETMASK, &prev, 0); 4166
1872#endif 4167 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
4168 ev_set_priority (&sigfd_w, EV_MAXPRI);
4169 ev_io_start (EV_A_ &sigfd_w);
4170 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
4171 }
1873 } 4172 }
4173
4174 if (sigfd >= 0)
4175 {
4176 /* TODO: check .head */
4177 sigaddset (&sigfd_set, w->signum);
4178 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
4179
4180 signalfd (sigfd, &sigfd_set, 0);
4181 }
4182#endif
1874 4183
1875 ev_start (EV_A_ (W)w, 1); 4184 ev_start (EV_A_ (W)w, 1);
1876 wlist_add (&signals [w->signum - 1].head, (WL)w); 4185 wlist_add (&signals [w->signum - 1].head, (WL)w);
1877 4186
1878 if (!((WL)w)->next) 4187 if (!((WL)w)->next)
4188# if EV_USE_SIGNALFD
4189 if (sigfd < 0) /*TODO*/
4190# endif
1879 { 4191 {
1880#if _WIN32 4192# ifdef _WIN32
4193 evpipe_init (EV_A);
4194
1881 signal (w->signum, sighandler); 4195 signal (w->signum, ev_sighandler);
1882#else 4196# else
1883 struct sigaction sa; 4197 struct sigaction sa;
4198
4199 evpipe_init (EV_A);
4200
1884 sa.sa_handler = sighandler; 4201 sa.sa_handler = ev_sighandler;
1885 sigfillset (&sa.sa_mask); 4202 sigfillset (&sa.sa_mask);
1886 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4203 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1887 sigaction (w->signum, &sa, 0); 4204 sigaction (w->signum, &sa, 0);
4205
4206 if (origflags & EVFLAG_NOSIGMASK)
4207 {
4208 sigemptyset (&sa.sa_mask);
4209 sigaddset (&sa.sa_mask, w->signum);
4210 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4211 }
1888#endif 4212#endif
1889 } 4213 }
1890}
1891 4214
4215 EV_FREQUENT_CHECK;
4216}
4217
1892void noinline 4218noinline
4219void
1893ev_signal_stop (EV_P_ ev_signal *w) 4220ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
1894{ 4221{
1895 clear_pending (EV_A_ (W)w); 4222 clear_pending (EV_A_ (W)w);
1896 if (expect_false (!ev_is_active (w))) 4223 if (expect_false (!ev_is_active (w)))
1897 return; 4224 return;
1898 4225
4226 EV_FREQUENT_CHECK;
4227
1899 wlist_del (&signals [w->signum - 1].head, (WL)w); 4228 wlist_del (&signals [w->signum - 1].head, (WL)w);
1900 ev_stop (EV_A_ (W)w); 4229 ev_stop (EV_A_ (W)w);
1901 4230
1902 if (!signals [w->signum - 1].head) 4231 if (!signals [w->signum - 1].head)
1903 signal (w->signum, SIG_DFL); 4232 {
1904}
1905
1906void
1907ev_child_start (EV_P_ ev_child *w)
1908{
1909#if EV_MULTIPLICITY 4233#if EV_MULTIPLICITY
4234 signals [w->signum - 1].loop = 0; /* unattach from signal */
4235#endif
4236#if EV_USE_SIGNALFD
4237 if (sigfd >= 0)
4238 {
4239 sigset_t ss;
4240
4241 sigemptyset (&ss);
4242 sigaddset (&ss, w->signum);
4243 sigdelset (&sigfd_set, w->signum);
4244
4245 signalfd (sigfd, &sigfd_set, 0);
4246 sigprocmask (SIG_UNBLOCK, &ss, 0);
4247 }
4248 else
4249#endif
4250 signal (w->signum, SIG_DFL);
4251 }
4252
4253 EV_FREQUENT_CHECK;
4254}
4255
4256#endif
4257
4258#if EV_CHILD_ENABLE
4259
4260void
4261ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
4262{
4263#if EV_MULTIPLICITY
1910 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4264 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1911#endif 4265#endif
1912 if (expect_false (ev_is_active (w))) 4266 if (expect_false (ev_is_active (w)))
1913 return; 4267 return;
1914 4268
4269 EV_FREQUENT_CHECK;
4270
1915 ev_start (EV_A_ (W)w, 1); 4271 ev_start (EV_A_ (W)w, 1);
1916 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4272 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1917}
1918 4273
4274 EV_FREQUENT_CHECK;
4275}
4276
1919void 4277void
1920ev_child_stop (EV_P_ ev_child *w) 4278ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
1921{ 4279{
1922 clear_pending (EV_A_ (W)w); 4280 clear_pending (EV_A_ (W)w);
1923 if (expect_false (!ev_is_active (w))) 4281 if (expect_false (!ev_is_active (w)))
1924 return; 4282 return;
1925 4283
4284 EV_FREQUENT_CHECK;
4285
1926 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4286 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1927 ev_stop (EV_A_ (W)w); 4287 ev_stop (EV_A_ (W)w);
4288
4289 EV_FREQUENT_CHECK;
1928} 4290}
4291
4292#endif
1929 4293
1930#if EV_STAT_ENABLE 4294#if EV_STAT_ENABLE
1931 4295
1932# ifdef _WIN32 4296# ifdef _WIN32
1933# undef lstat 4297# undef lstat
1934# define lstat(a,b) _stati64 (a,b) 4298# define lstat(a,b) _stati64 (a,b)
1935# endif 4299# endif
1936 4300
1937#define DEF_STAT_INTERVAL 5.0074891 4301#define DEF_STAT_INTERVAL 5.0074891
4302#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1938#define MIN_STAT_INTERVAL 0.1074891 4303#define MIN_STAT_INTERVAL 0.1074891
1939 4304
1940static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4305noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1941 4306
1942#if EV_USE_INOTIFY 4307#if EV_USE_INOTIFY
1943# define EV_INOTIFY_BUFSIZE 8192
1944 4308
1945static void noinline 4309/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
4310# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
4311
4312noinline
4313static void
1946infy_add (EV_P_ ev_stat *w) 4314infy_add (EV_P_ ev_stat *w)
1947{ 4315{
1948 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); 4316 w->wd = inotify_add_watch (fs_fd, w->path,
4317 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4318 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4319 | IN_DONT_FOLLOW | IN_MASK_ADD);
1949 4320
1950 if (w->wd < 0) 4321 if (w->wd >= 0)
4322 {
4323 struct statfs sfs;
4324
4325 /* now local changes will be tracked by inotify, but remote changes won't */
4326 /* unless the filesystem is known to be local, we therefore still poll */
4327 /* also do poll on <2.6.25, but with normal frequency */
4328
4329 if (!fs_2625)
4330 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4331 else if (!statfs (w->path, &sfs)
4332 && (sfs.f_type == 0x1373 /* devfs */
4333 || sfs.f_type == 0x4006 /* fat */
4334 || sfs.f_type == 0x4d44 /* msdos */
4335 || sfs.f_type == 0xEF53 /* ext2/3 */
4336 || sfs.f_type == 0x72b6 /* jffs2 */
4337 || sfs.f_type == 0x858458f6 /* ramfs */
4338 || sfs.f_type == 0x5346544e /* ntfs */
4339 || sfs.f_type == 0x3153464a /* jfs */
4340 || sfs.f_type == 0x9123683e /* btrfs */
4341 || sfs.f_type == 0x52654973 /* reiser3 */
4342 || sfs.f_type == 0x01021994 /* tmpfs */
4343 || sfs.f_type == 0x58465342 /* xfs */))
4344 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4345 else
4346 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1951 { 4347 }
1952 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 4348 else
4349 {
4350 /* can't use inotify, continue to stat */
4351 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1953 4352
1954 /* monitor some parent directory for speedup hints */ 4353 /* if path is not there, monitor some parent directory for speedup hints */
4354 /* note that exceeding the hardcoded path limit is not a correctness issue, */
4355 /* but an efficiency issue only */
1955 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 4356 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1956 { 4357 {
1957 char path [4096]; 4358 char path [4096];
1958 strcpy (path, w->path); 4359 strcpy (path, w->path);
1959 4360
… …
1962 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 4363 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1963 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 4364 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1964 4365
1965 char *pend = strrchr (path, '/'); 4366 char *pend = strrchr (path, '/');
1966 4367
1967 if (!pend) 4368 if (!pend || pend == path)
1968 break; /* whoops, no '/', complain to your admin */ 4369 break;
1969 4370
1970 *pend = 0; 4371 *pend = 0;
1971 w->wd = inotify_add_watch (fs_fd, path, mask); 4372 w->wd = inotify_add_watch (fs_fd, path, mask);
1972 } 4373 }
1973 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4374 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1974 } 4375 }
1975 } 4376 }
1976 else
1977 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1978 4377
1979 if (w->wd >= 0) 4378 if (w->wd >= 0)
1980 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4379 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
1981}
1982 4380
1983static void noinline 4381 /* now re-arm timer, if required */
4382 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4383 ev_timer_again (EV_A_ &w->timer);
4384 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4385}
4386
4387noinline
4388static void
1984infy_del (EV_P_ ev_stat *w) 4389infy_del (EV_P_ ev_stat *w)
1985{ 4390{
1986 int slot; 4391 int slot;
1987 int wd = w->wd; 4392 int wd = w->wd;
1988 4393
1989 if (wd < 0) 4394 if (wd < 0)
1990 return; 4395 return;
1991 4396
1992 w->wd = -2; 4397 w->wd = -2;
1993 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 4398 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1994 wlist_del (&fs_hash [slot].head, (WL)w); 4399 wlist_del (&fs_hash [slot].head, (WL)w);
1995 4400
1996 /* remove this watcher, if others are watching it, they will rearm */ 4401 /* remove this watcher, if others are watching it, they will rearm */
1997 inotify_rm_watch (fs_fd, wd); 4402 inotify_rm_watch (fs_fd, wd);
1998} 4403}
1999 4404
2000static void noinline 4405noinline
4406static void
2001infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4407infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2002{ 4408{
2003 if (slot < 0) 4409 if (slot < 0)
2004 /* overflow, need to check for all hahs slots */ 4410 /* overflow, need to check for all hash slots */
2005 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4411 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2006 infy_wd (EV_A_ slot, wd, ev); 4412 infy_wd (EV_A_ slot, wd, ev);
2007 else 4413 else
2008 { 4414 {
2009 WL w_; 4415 WL w_;
2010 4416
2011 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 4417 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2012 { 4418 {
2013 ev_stat *w = (ev_stat *)w_; 4419 ev_stat *w = (ev_stat *)w_;
2014 w_ = w_->next; /* lets us remove this watcher and all before it */ 4420 w_ = w_->next; /* lets us remove this watcher and all before it */
2015 4421
2016 if (w->wd == wd || wd == -1) 4422 if (w->wd == wd || wd == -1)
2017 { 4423 {
2018 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 4424 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2019 { 4425 {
4426 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2020 w->wd = -1; 4427 w->wd = -1;
2021 infy_add (EV_A_ w); /* re-add, no matter what */ 4428 infy_add (EV_A_ w); /* re-add, no matter what */
2022 } 4429 }
2023 4430
2024 stat_timer_cb (EV_A_ &w->timer, 0); 4431 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2029 4436
2030static void 4437static void
2031infy_cb (EV_P_ ev_io *w, int revents) 4438infy_cb (EV_P_ ev_io *w, int revents)
2032{ 4439{
2033 char buf [EV_INOTIFY_BUFSIZE]; 4440 char buf [EV_INOTIFY_BUFSIZE];
2034 struct inotify_event *ev = (struct inotify_event *)buf;
2035 int ofs; 4441 int ofs;
2036 int len = read (fs_fd, buf, sizeof (buf)); 4442 int len = read (fs_fd, buf, sizeof (buf));
2037 4443
2038 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 4444 for (ofs = 0; ofs < len; )
4445 {
4446 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2039 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4447 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4448 ofs += sizeof (struct inotify_event) + ev->len;
4449 }
2040} 4450}
2041 4451
2042void inline_size 4452inline_size ecb_cold
4453void
4454ev_check_2625 (EV_P)
4455{
4456 /* kernels < 2.6.25 are borked
4457 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4458 */
4459 if (ev_linux_version () < 0x020619)
4460 return;
4461
4462 fs_2625 = 1;
4463}
4464
4465inline_size int
4466infy_newfd (void)
4467{
4468#if defined IN_CLOEXEC && defined IN_NONBLOCK
4469 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4470 if (fd >= 0)
4471 return fd;
4472#endif
4473 return inotify_init ();
4474}
4475
4476inline_size void
2043infy_init (EV_P) 4477infy_init (EV_P)
2044{ 4478{
2045 if (fs_fd != -2) 4479 if (fs_fd != -2)
2046 return; 4480 return;
2047 4481
4482 fs_fd = -1;
4483
4484 ev_check_2625 (EV_A);
4485
2048 fs_fd = inotify_init (); 4486 fs_fd = infy_newfd ();
2049 4487
2050 if (fs_fd >= 0) 4488 if (fs_fd >= 0)
2051 { 4489 {
4490 fd_intern (fs_fd);
2052 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 4491 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2053 ev_set_priority (&fs_w, EV_MAXPRI); 4492 ev_set_priority (&fs_w, EV_MAXPRI);
2054 ev_io_start (EV_A_ &fs_w); 4493 ev_io_start (EV_A_ &fs_w);
4494 ev_unref (EV_A);
2055 } 4495 }
2056} 4496}
2057 4497
2058void inline_size 4498inline_size void
2059infy_fork (EV_P) 4499infy_fork (EV_P)
2060{ 4500{
2061 int slot; 4501 int slot;
2062 4502
2063 if (fs_fd < 0) 4503 if (fs_fd < 0)
2064 return; 4504 return;
2065 4505
4506 ev_ref (EV_A);
4507 ev_io_stop (EV_A_ &fs_w);
2066 close (fs_fd); 4508 close (fs_fd);
2067 fs_fd = inotify_init (); 4509 fs_fd = infy_newfd ();
2068 4510
4511 if (fs_fd >= 0)
4512 {
4513 fd_intern (fs_fd);
4514 ev_io_set (&fs_w, fs_fd, EV_READ);
4515 ev_io_start (EV_A_ &fs_w);
4516 ev_unref (EV_A);
4517 }
4518
2069 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4519 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2070 { 4520 {
2071 WL w_ = fs_hash [slot].head; 4521 WL w_ = fs_hash [slot].head;
2072 fs_hash [slot].head = 0; 4522 fs_hash [slot].head = 0;
2073 4523
2074 while (w_) 4524 while (w_)
… …
2079 w->wd = -1; 4529 w->wd = -1;
2080 4530
2081 if (fs_fd >= 0) 4531 if (fs_fd >= 0)
2082 infy_add (EV_A_ w); /* re-add, no matter what */ 4532 infy_add (EV_A_ w); /* re-add, no matter what */
2083 else 4533 else
4534 {
4535 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4536 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2084 ev_timer_start (EV_A_ &w->timer); 4537 ev_timer_again (EV_A_ &w->timer);
4538 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4539 }
2085 } 4540 }
2086
2087 } 4541 }
2088} 4542}
2089 4543
2090#endif 4544#endif
2091 4545
4546#ifdef _WIN32
4547# define EV_LSTAT(p,b) _stati64 (p, b)
4548#else
4549# define EV_LSTAT(p,b) lstat (p, b)
4550#endif
4551
2092void 4552void
2093ev_stat_stat (EV_P_ ev_stat *w) 4553ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
2094{ 4554{
2095 if (lstat (w->path, &w->attr) < 0) 4555 if (lstat (w->path, &w->attr) < 0)
2096 w->attr.st_nlink = 0; 4556 w->attr.st_nlink = 0;
2097 else if (!w->attr.st_nlink) 4557 else if (!w->attr.st_nlink)
2098 w->attr.st_nlink = 1; 4558 w->attr.st_nlink = 1;
2099} 4559}
2100 4560
2101static void noinline 4561noinline
4562static void
2102stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4563stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2103{ 4564{
2104 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4565 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2105 4566
2106 /* we copy this here each the time so that */ 4567 ev_statdata prev = w->attr;
2107 /* prev has the old value when the callback gets invoked */
2108 w->prev = w->attr;
2109 ev_stat_stat (EV_A_ w); 4568 ev_stat_stat (EV_A_ w);
2110 4569
2111 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 4570 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2112 if ( 4571 if (
2113 w->prev.st_dev != w->attr.st_dev 4572 prev.st_dev != w->attr.st_dev
2114 || w->prev.st_ino != w->attr.st_ino 4573 || prev.st_ino != w->attr.st_ino
2115 || w->prev.st_mode != w->attr.st_mode 4574 || prev.st_mode != w->attr.st_mode
2116 || w->prev.st_nlink != w->attr.st_nlink 4575 || prev.st_nlink != w->attr.st_nlink
2117 || w->prev.st_uid != w->attr.st_uid 4576 || prev.st_uid != w->attr.st_uid
2118 || w->prev.st_gid != w->attr.st_gid 4577 || prev.st_gid != w->attr.st_gid
2119 || w->prev.st_rdev != w->attr.st_rdev 4578 || prev.st_rdev != w->attr.st_rdev
2120 || w->prev.st_size != w->attr.st_size 4579 || prev.st_size != w->attr.st_size
2121 || w->prev.st_atime != w->attr.st_atime 4580 || prev.st_atime != w->attr.st_atime
2122 || w->prev.st_mtime != w->attr.st_mtime 4581 || prev.st_mtime != w->attr.st_mtime
2123 || w->prev.st_ctime != w->attr.st_ctime 4582 || prev.st_ctime != w->attr.st_ctime
2124 ) { 4583 ) {
4584 /* we only update w->prev on actual differences */
4585 /* in case we test more often than invoke the callback, */
4586 /* to ensure that prev is always different to attr */
4587 w->prev = prev;
4588
2125 #if EV_USE_INOTIFY 4589 #if EV_USE_INOTIFY
4590 if (fs_fd >= 0)
4591 {
2126 infy_del (EV_A_ w); 4592 infy_del (EV_A_ w);
2127 infy_add (EV_A_ w); 4593 infy_add (EV_A_ w);
2128 ev_stat_stat (EV_A_ w); /* avoid race... */ 4594 ev_stat_stat (EV_A_ w); /* avoid race... */
4595 }
2129 #endif 4596 #endif
2130 4597
2131 ev_feed_event (EV_A_ w, EV_STAT); 4598 ev_feed_event (EV_A_ w, EV_STAT);
2132 } 4599 }
2133} 4600}
2134 4601
2135void 4602void
2136ev_stat_start (EV_P_ ev_stat *w) 4603ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
2137{ 4604{
2138 if (expect_false (ev_is_active (w))) 4605 if (expect_false (ev_is_active (w)))
2139 return; 4606 return;
2140 4607
2141 /* since we use memcmp, we need to clear any padding data etc. */
2142 memset (&w->prev, 0, sizeof (ev_statdata));
2143 memset (&w->attr, 0, sizeof (ev_statdata));
2144
2145 ev_stat_stat (EV_A_ w); 4608 ev_stat_stat (EV_A_ w);
2146 4609
4610 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2147 if (w->interval < MIN_STAT_INTERVAL) 4611 w->interval = MIN_STAT_INTERVAL;
2148 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2149 4612
2150 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 4613 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2151 ev_set_priority (&w->timer, ev_priority (w)); 4614 ev_set_priority (&w->timer, ev_priority (w));
2152 4615
2153#if EV_USE_INOTIFY 4616#if EV_USE_INOTIFY
2154 infy_init (EV_A); 4617 infy_init (EV_A);
2155 4618
2156 if (fs_fd >= 0) 4619 if (fs_fd >= 0)
2157 infy_add (EV_A_ w); 4620 infy_add (EV_A_ w);
2158 else 4621 else
2159#endif 4622#endif
4623 {
2160 ev_timer_start (EV_A_ &w->timer); 4624 ev_timer_again (EV_A_ &w->timer);
4625 ev_unref (EV_A);
4626 }
2161 4627
2162 ev_start (EV_A_ (W)w, 1); 4628 ev_start (EV_A_ (W)w, 1);
2163}
2164 4629
4630 EV_FREQUENT_CHECK;
4631}
4632
2165void 4633void
2166ev_stat_stop (EV_P_ ev_stat *w) 4634ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
2167{ 4635{
2168 clear_pending (EV_A_ (W)w); 4636 clear_pending (EV_A_ (W)w);
2169 if (expect_false (!ev_is_active (w))) 4637 if (expect_false (!ev_is_active (w)))
2170 return; 4638 return;
2171 4639
4640 EV_FREQUENT_CHECK;
4641
2172#if EV_USE_INOTIFY 4642#if EV_USE_INOTIFY
2173 infy_del (EV_A_ w); 4643 infy_del (EV_A_ w);
2174#endif 4644#endif
4645
4646 if (ev_is_active (&w->timer))
4647 {
4648 ev_ref (EV_A);
2175 ev_timer_stop (EV_A_ &w->timer); 4649 ev_timer_stop (EV_A_ &w->timer);
4650 }
2176 4651
2177 ev_stop (EV_A_ (W)w); 4652 ev_stop (EV_A_ (W)w);
4653
4654 EV_FREQUENT_CHECK;
2178} 4655}
2179#endif 4656#endif
2180 4657
2181#if EV_IDLE_ENABLE 4658#if EV_IDLE_ENABLE
2182void 4659void
2183ev_idle_start (EV_P_ ev_idle *w) 4660ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
2184{ 4661{
2185 if (expect_false (ev_is_active (w))) 4662 if (expect_false (ev_is_active (w)))
2186 return; 4663 return;
2187 4664
2188 pri_adjust (EV_A_ (W)w); 4665 pri_adjust (EV_A_ (W)w);
2189 4666
4667 EV_FREQUENT_CHECK;
4668
2190 { 4669 {
2191 int active = ++idlecnt [ABSPRI (w)]; 4670 int active = ++idlecnt [ABSPRI (w)];
2192 4671
2193 ++idleall; 4672 ++idleall;
2194 ev_start (EV_A_ (W)w, active); 4673 ev_start (EV_A_ (W)w, active);
2195 4674
2196 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4675 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
2197 idles [ABSPRI (w)][active - 1] = w; 4676 idles [ABSPRI (w)][active - 1] = w;
2198 } 4677 }
2199}
2200 4678
4679 EV_FREQUENT_CHECK;
4680}
4681
2201void 4682void
2202ev_idle_stop (EV_P_ ev_idle *w) 4683ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
2203{ 4684{
2204 clear_pending (EV_A_ (W)w); 4685 clear_pending (EV_A_ (W)w);
2205 if (expect_false (!ev_is_active (w))) 4686 if (expect_false (!ev_is_active (w)))
2206 return; 4687 return;
2207 4688
4689 EV_FREQUENT_CHECK;
4690
2208 { 4691 {
2209 int active = ((W)w)->active; 4692 int active = ev_active (w);
2210 4693
2211 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 4694 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2212 ((W)idles [ABSPRI (w)][active - 1])->active = active; 4695 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2213 4696
2214 ev_stop (EV_A_ (W)w); 4697 ev_stop (EV_A_ (W)w);
2215 --idleall; 4698 --idleall;
2216 } 4699 }
2217}
2218#endif
2219 4700
4701 EV_FREQUENT_CHECK;
4702}
4703#endif
4704
4705#if EV_PREPARE_ENABLE
2220void 4706void
2221ev_prepare_start (EV_P_ ev_prepare *w) 4707ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
2222{ 4708{
2223 if (expect_false (ev_is_active (w))) 4709 if (expect_false (ev_is_active (w)))
2224 return; 4710 return;
2225 4711
4712 EV_FREQUENT_CHECK;
4713
2226 ev_start (EV_A_ (W)w, ++preparecnt); 4714 ev_start (EV_A_ (W)w, ++preparecnt);
2227 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4715 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
2228 prepares [preparecnt - 1] = w; 4716 prepares [preparecnt - 1] = w;
2229}
2230 4717
4718 EV_FREQUENT_CHECK;
4719}
4720
2231void 4721void
2232ev_prepare_stop (EV_P_ ev_prepare *w) 4722ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
2233{ 4723{
2234 clear_pending (EV_A_ (W)w); 4724 clear_pending (EV_A_ (W)w);
2235 if (expect_false (!ev_is_active (w))) 4725 if (expect_false (!ev_is_active (w)))
2236 return; 4726 return;
2237 4727
4728 EV_FREQUENT_CHECK;
4729
2238 { 4730 {
2239 int active = ((W)w)->active; 4731 int active = ev_active (w);
4732
2240 prepares [active - 1] = prepares [--preparecnt]; 4733 prepares [active - 1] = prepares [--preparecnt];
2241 ((W)prepares [active - 1])->active = active; 4734 ev_active (prepares [active - 1]) = active;
2242 } 4735 }
2243 4736
2244 ev_stop (EV_A_ (W)w); 4737 ev_stop (EV_A_ (W)w);
2245}
2246 4738
4739 EV_FREQUENT_CHECK;
4740}
4741#endif
4742
4743#if EV_CHECK_ENABLE
2247void 4744void
2248ev_check_start (EV_P_ ev_check *w) 4745ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
2249{ 4746{
2250 if (expect_false (ev_is_active (w))) 4747 if (expect_false (ev_is_active (w)))
2251 return; 4748 return;
2252 4749
4750 EV_FREQUENT_CHECK;
4751
2253 ev_start (EV_A_ (W)w, ++checkcnt); 4752 ev_start (EV_A_ (W)w, ++checkcnt);
2254 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4753 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
2255 checks [checkcnt - 1] = w; 4754 checks [checkcnt - 1] = w;
2256}
2257 4755
4756 EV_FREQUENT_CHECK;
4757}
4758
2258void 4759void
2259ev_check_stop (EV_P_ ev_check *w) 4760ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
2260{ 4761{
2261 clear_pending (EV_A_ (W)w); 4762 clear_pending (EV_A_ (W)w);
2262 if (expect_false (!ev_is_active (w))) 4763 if (expect_false (!ev_is_active (w)))
2263 return; 4764 return;
2264 4765
4766 EV_FREQUENT_CHECK;
4767
2265 { 4768 {
2266 int active = ((W)w)->active; 4769 int active = ev_active (w);
4770
2267 checks [active - 1] = checks [--checkcnt]; 4771 checks [active - 1] = checks [--checkcnt];
2268 ((W)checks [active - 1])->active = active; 4772 ev_active (checks [active - 1]) = active;
2269 } 4773 }
2270 4774
2271 ev_stop (EV_A_ (W)w); 4775 ev_stop (EV_A_ (W)w);
4776
4777 EV_FREQUENT_CHECK;
2272} 4778}
4779#endif
2273 4780
2274#if EV_EMBED_ENABLE 4781#if EV_EMBED_ENABLE
2275void noinline 4782noinline
4783void
2276ev_embed_sweep (EV_P_ ev_embed *w) 4784ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
2277{ 4785{
2278 ev_loop (w->other, EVLOOP_NONBLOCK); 4786 ev_run (w->other, EVRUN_NOWAIT);
2279} 4787}
2280 4788
2281static void 4789static void
2282embed_io_cb (EV_P_ ev_io *io, int revents) 4790embed_io_cb (EV_P_ ev_io *io, int revents)
2283{ 4791{
2284 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4792 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2285 4793
2286 if (ev_cb (w)) 4794 if (ev_cb (w))
2287 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4795 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2288 else 4796 else
2289 ev_loop (w->other, EVLOOP_NONBLOCK); 4797 ev_run (w->other, EVRUN_NOWAIT);
2290} 4798}
2291 4799
2292static void 4800static void
2293embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4801embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2294{ 4802{
2295 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 4803 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2296 4804
2297 { 4805 {
2298 struct ev_loop *loop = w->other; 4806 EV_P = w->other;
2299 4807
2300 while (fdchangecnt) 4808 while (fdchangecnt)
2301 { 4809 {
2302 fd_reify (EV_A); 4810 fd_reify (EV_A);
2303 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4811 ev_run (EV_A_ EVRUN_NOWAIT);
2304 } 4812 }
2305 } 4813 }
4814}
4815
4816static void
4817embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4818{
4819 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4820
4821 ev_embed_stop (EV_A_ w);
4822
4823 {
4824 EV_P = w->other;
4825
4826 ev_loop_fork (EV_A);
4827 ev_run (EV_A_ EVRUN_NOWAIT);
4828 }
4829
4830 ev_embed_start (EV_A_ w);
2306} 4831}
2307 4832
2308#if 0 4833#if 0
2309static void 4834static void
2310embed_idle_cb (EV_P_ ev_idle *idle, int revents) 4835embed_idle_cb (EV_P_ ev_idle *idle, int revents)
… …
2312 ev_idle_stop (EV_A_ idle); 4837 ev_idle_stop (EV_A_ idle);
2313} 4838}
2314#endif 4839#endif
2315 4840
2316void 4841void
2317ev_embed_start (EV_P_ ev_embed *w) 4842ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
2318{ 4843{
2319 if (expect_false (ev_is_active (w))) 4844 if (expect_false (ev_is_active (w)))
2320 return; 4845 return;
2321 4846
2322 { 4847 {
2323 struct ev_loop *loop = w->other; 4848 EV_P = w->other;
2324 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4849 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2325 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 4850 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2326 } 4851 }
4852
4853 EV_FREQUENT_CHECK;
2327 4854
2328 ev_set_priority (&w->io, ev_priority (w)); 4855 ev_set_priority (&w->io, ev_priority (w));
2329 ev_io_start (EV_A_ &w->io); 4856 ev_io_start (EV_A_ &w->io);
2330 4857
2331 ev_prepare_init (&w->prepare, embed_prepare_cb); 4858 ev_prepare_init (&w->prepare, embed_prepare_cb);
2332 ev_set_priority (&w->prepare, EV_MINPRI); 4859 ev_set_priority (&w->prepare, EV_MINPRI);
2333 ev_prepare_start (EV_A_ &w->prepare); 4860 ev_prepare_start (EV_A_ &w->prepare);
2334 4861
4862 ev_fork_init (&w->fork, embed_fork_cb);
4863 ev_fork_start (EV_A_ &w->fork);
4864
2335 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 4865 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2336 4866
2337 ev_start (EV_A_ (W)w, 1); 4867 ev_start (EV_A_ (W)w, 1);
2338}
2339 4868
4869 EV_FREQUENT_CHECK;
4870}
4871
2340void 4872void
2341ev_embed_stop (EV_P_ ev_embed *w) 4873ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
2342{ 4874{
2343 clear_pending (EV_A_ (W)w); 4875 clear_pending (EV_A_ (W)w);
2344 if (expect_false (!ev_is_active (w))) 4876 if (expect_false (!ev_is_active (w)))
2345 return; 4877 return;
2346 4878
4879 EV_FREQUENT_CHECK;
4880
2347 ev_io_stop (EV_A_ &w->io); 4881 ev_io_stop (EV_A_ &w->io);
2348 ev_prepare_stop (EV_A_ &w->prepare); 4882 ev_prepare_stop (EV_A_ &w->prepare);
4883 ev_fork_stop (EV_A_ &w->fork);
2349 4884
2350 ev_stop (EV_A_ (W)w); 4885 ev_stop (EV_A_ (W)w);
4886
4887 EV_FREQUENT_CHECK;
2351} 4888}
2352#endif 4889#endif
2353 4890
2354#if EV_FORK_ENABLE 4891#if EV_FORK_ENABLE
2355void 4892void
2356ev_fork_start (EV_P_ ev_fork *w) 4893ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
2357{ 4894{
2358 if (expect_false (ev_is_active (w))) 4895 if (expect_false (ev_is_active (w)))
2359 return; 4896 return;
2360 4897
4898 EV_FREQUENT_CHECK;
4899
2361 ev_start (EV_A_ (W)w, ++forkcnt); 4900 ev_start (EV_A_ (W)w, ++forkcnt);
2362 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4901 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
2363 forks [forkcnt - 1] = w; 4902 forks [forkcnt - 1] = w;
2364}
2365 4903
4904 EV_FREQUENT_CHECK;
4905}
4906
2366void 4907void
2367ev_fork_stop (EV_P_ ev_fork *w) 4908ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
2368{ 4909{
2369 clear_pending (EV_A_ (W)w); 4910 clear_pending (EV_A_ (W)w);
2370 if (expect_false (!ev_is_active (w))) 4911 if (expect_false (!ev_is_active (w)))
2371 return; 4912 return;
2372 4913
4914 EV_FREQUENT_CHECK;
4915
2373 { 4916 {
2374 int active = ((W)w)->active; 4917 int active = ev_active (w);
4918
2375 forks [active - 1] = forks [--forkcnt]; 4919 forks [active - 1] = forks [--forkcnt];
2376 ((W)forks [active - 1])->active = active; 4920 ev_active (forks [active - 1]) = active;
2377 } 4921 }
2378 4922
2379 ev_stop (EV_A_ (W)w); 4923 ev_stop (EV_A_ (W)w);
4924
4925 EV_FREQUENT_CHECK;
4926}
4927#endif
4928
4929#if EV_CLEANUP_ENABLE
4930void
4931ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
4932{
4933 if (expect_false (ev_is_active (w)))
4934 return;
4935
4936 EV_FREQUENT_CHECK;
4937
4938 ev_start (EV_A_ (W)w, ++cleanupcnt);
4939 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
4940 cleanups [cleanupcnt - 1] = w;
4941
4942 /* cleanup watchers should never keep a refcount on the loop */
4943 ev_unref (EV_A);
4944 EV_FREQUENT_CHECK;
4945}
4946
4947void
4948ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
4949{
4950 clear_pending (EV_A_ (W)w);
4951 if (expect_false (!ev_is_active (w)))
4952 return;
4953
4954 EV_FREQUENT_CHECK;
4955 ev_ref (EV_A);
4956
4957 {
4958 int active = ev_active (w);
4959
4960 cleanups [active - 1] = cleanups [--cleanupcnt];
4961 ev_active (cleanups [active - 1]) = active;
4962 }
4963
4964 ev_stop (EV_A_ (W)w);
4965
4966 EV_FREQUENT_CHECK;
4967}
4968#endif
4969
4970#if EV_ASYNC_ENABLE
4971void
4972ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
4973{
4974 if (expect_false (ev_is_active (w)))
4975 return;
4976
4977 w->sent = 0;
4978
4979 evpipe_init (EV_A);
4980
4981 EV_FREQUENT_CHECK;
4982
4983 ev_start (EV_A_ (W)w, ++asynccnt);
4984 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
4985 asyncs [asynccnt - 1] = w;
4986
4987 EV_FREQUENT_CHECK;
4988}
4989
4990void
4991ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
4992{
4993 clear_pending (EV_A_ (W)w);
4994 if (expect_false (!ev_is_active (w)))
4995 return;
4996
4997 EV_FREQUENT_CHECK;
4998
4999 {
5000 int active = ev_active (w);
5001
5002 asyncs [active - 1] = asyncs [--asynccnt];
5003 ev_active (asyncs [active - 1]) = active;
5004 }
5005
5006 ev_stop (EV_A_ (W)w);
5007
5008 EV_FREQUENT_CHECK;
5009}
5010
5011void
5012ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
5013{
5014 w->sent = 1;
5015 evpipe_write (EV_A_ &async_pending);
2380} 5016}
2381#endif 5017#endif
2382 5018
2383/*****************************************************************************/ 5019/*****************************************************************************/
2384 5020
… …
2394once_cb (EV_P_ struct ev_once *once, int revents) 5030once_cb (EV_P_ struct ev_once *once, int revents)
2395{ 5031{
2396 void (*cb)(int revents, void *arg) = once->cb; 5032 void (*cb)(int revents, void *arg) = once->cb;
2397 void *arg = once->arg; 5033 void *arg = once->arg;
2398 5034
2399 ev_io_stop (EV_A_ &once->io); 5035 ev_io_stop (EV_A_ &once->io);
2400 ev_timer_stop (EV_A_ &once->to); 5036 ev_timer_stop (EV_A_ &once->to);
2401 ev_free (once); 5037 ev_free (once);
2402 5038
2403 cb (revents, arg); 5039 cb (revents, arg);
2404} 5040}
2405 5041
2406static void 5042static void
2407once_cb_io (EV_P_ ev_io *w, int revents) 5043once_cb_io (EV_P_ ev_io *w, int revents)
2408{ 5044{
2409 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 5045 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
5046
5047 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2410} 5048}
2411 5049
2412static void 5050static void
2413once_cb_to (EV_P_ ev_timer *w, int revents) 5051once_cb_to (EV_P_ ev_timer *w, int revents)
2414{ 5052{
2415 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 5053 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
2416}
2417 5054
5055 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
5056}
5057
2418void 5058void
2419ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5059ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
2420{ 5060{
2421 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5061 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2422
2423 if (expect_false (!once))
2424 {
2425 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
2426 return;
2427 }
2428 5062
2429 once->cb = cb; 5063 once->cb = cb;
2430 once->arg = arg; 5064 once->arg = arg;
2431 5065
2432 ev_init (&once->io, once_cb_io); 5066 ev_init (&once->io, once_cb_io);
… …
2442 ev_timer_set (&once->to, timeout, 0.); 5076 ev_timer_set (&once->to, timeout, 0.);
2443 ev_timer_start (EV_A_ &once->to); 5077 ev_timer_start (EV_A_ &once->to);
2444 } 5078 }
2445} 5079}
2446 5080
5081/*****************************************************************************/
5082
5083#if EV_WALK_ENABLE
5084ecb_cold
5085void
5086ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
5087{
5088 int i, j;
5089 ev_watcher_list *wl, *wn;
5090
5091 if (types & (EV_IO | EV_EMBED))
5092 for (i = 0; i < anfdmax; ++i)
5093 for (wl = anfds [i].head; wl; )
5094 {
5095 wn = wl->next;
5096
5097#if EV_EMBED_ENABLE
5098 if (ev_cb ((ev_io *)wl) == embed_io_cb)
5099 {
5100 if (types & EV_EMBED)
5101 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
5102 }
5103 else
5104#endif
5105#if EV_USE_INOTIFY
5106 if (ev_cb ((ev_io *)wl) == infy_cb)
5107 ;
5108 else
5109#endif
5110 if ((ev_io *)wl != &pipe_w)
5111 if (types & EV_IO)
5112 cb (EV_A_ EV_IO, wl);
5113
5114 wl = wn;
5115 }
5116
5117 if (types & (EV_TIMER | EV_STAT))
5118 for (i = timercnt + HEAP0; i-- > HEAP0; )
5119#if EV_STAT_ENABLE
5120 /*TODO: timer is not always active*/
5121 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
5122 {
5123 if (types & EV_STAT)
5124 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
5125 }
5126 else
5127#endif
5128 if (types & EV_TIMER)
5129 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
5130
5131#if EV_PERIODIC_ENABLE
5132 if (types & EV_PERIODIC)
5133 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
5134 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
5135#endif
5136
5137#if EV_IDLE_ENABLE
5138 if (types & EV_IDLE)
5139 for (j = NUMPRI; j--; )
5140 for (i = idlecnt [j]; i--; )
5141 cb (EV_A_ EV_IDLE, idles [j][i]);
5142#endif
5143
5144#if EV_FORK_ENABLE
5145 if (types & EV_FORK)
5146 for (i = forkcnt; i--; )
5147 if (ev_cb (forks [i]) != embed_fork_cb)
5148 cb (EV_A_ EV_FORK, forks [i]);
5149#endif
5150
5151#if EV_ASYNC_ENABLE
5152 if (types & EV_ASYNC)
5153 for (i = asynccnt; i--; )
5154 cb (EV_A_ EV_ASYNC, asyncs [i]);
5155#endif
5156
5157#if EV_PREPARE_ENABLE
5158 if (types & EV_PREPARE)
5159 for (i = preparecnt; i--; )
5160# if EV_EMBED_ENABLE
5161 if (ev_cb (prepares [i]) != embed_prepare_cb)
5162# endif
5163 cb (EV_A_ EV_PREPARE, prepares [i]);
5164#endif
5165
5166#if EV_CHECK_ENABLE
5167 if (types & EV_CHECK)
5168 for (i = checkcnt; i--; )
5169 cb (EV_A_ EV_CHECK, checks [i]);
5170#endif
5171
5172#if EV_SIGNAL_ENABLE
5173 if (types & EV_SIGNAL)
5174 for (i = 0; i < EV_NSIG - 1; ++i)
5175 for (wl = signals [i].head; wl; )
5176 {
5177 wn = wl->next;
5178 cb (EV_A_ EV_SIGNAL, wl);
5179 wl = wn;
5180 }
5181#endif
5182
5183#if EV_CHILD_ENABLE
5184 if (types & EV_CHILD)
5185 for (i = (EV_PID_HASHSIZE); i--; )
5186 for (wl = childs [i]; wl; )
5187 {
5188 wn = wl->next;
5189 cb (EV_A_ EV_CHILD, wl);
5190 wl = wn;
5191 }
5192#endif
5193/* EV_STAT 0x00001000 /* stat data changed */
5194/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
5195}
5196#endif
5197
2447#if EV_MULTIPLICITY 5198#if EV_MULTIPLICITY
2448 #include "ev_wrap.h" 5199 #include "ev_wrap.h"
2449#endif 5200#endif
2450 5201
2451#ifdef __cplusplus
2452}
2453#endif
2454

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