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Comparing libev/ev.c (file contents):
Revision 1.205 by root, Sun Jan 20 15:37:03 2008 UTC vs.
Revision 1.497 by root, Tue Jun 25 04:52:30 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__
574 typedef signed long long int64_t;
575 typedef unsigned long long uint64_t;
576 #else /* _MSC_VER || __BORLANDC__ */
577 typedef signed __int64 int64_t;
578 typedef unsigned __int64 uint64_t;
579 #endif
580 #ifdef _WIN64
581 #define ECB_PTRSIZE 8
582 typedef uint64_t uintptr_t;
583 typedef int64_t intptr_t;
584 #else
585 #define ECB_PTRSIZE 4
586 typedef uint32_t uintptr_t;
587 typedef int32_t intptr_t;
588 #endif
589#else
590 #include <inttypes.h>
591 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
592 #define ECB_PTRSIZE 8
593 #else
594 #define ECB_PTRSIZE 4
595 #endif
596#endif
597
598#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
599#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
600
601/* work around x32 idiocy by defining proper macros */
602#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
603 #if _ILP32
604 #define ECB_AMD64_X32 1
605 #else
606 #define ECB_AMD64 1
607 #endif
608#endif
609
610/* many compilers define _GNUC_ to some versions but then only implement
611 * what their idiot authors think are the "more important" extensions,
612 * causing enormous grief in return for some better fake benchmark numbers.
613 * or so.
614 * we try to detect these and simply assume they are not gcc - if they have
615 * an issue with that they should have done it right in the first place.
616 */
617#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
618 #define ECB_GCC_VERSION(major,minor) 0
619#else
620 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
621#endif
622
623#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
624
625#if __clang__ && defined __has_builtin
626 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
627#else
628 #define ECB_CLANG_BUILTIN(x) 0
629#endif
630
631#if __clang__ && defined __has_extension
632 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
633#else
634 #define ECB_CLANG_EXTENSION(x) 0
635#endif
636
637#define ECB_CPP (__cplusplus+0)
638#define ECB_CPP11 (__cplusplus >= 201103L)
639#define ECB_CPP14 (__cplusplus >= 201402L)
640#define ECB_CPP17 (__cplusplus >= 201703L)
641
642#if ECB_CPP
643 #define ECB_C 0
644 #define ECB_STDC_VERSION 0
645#else
646 #define ECB_C 1
647 #define ECB_STDC_VERSION __STDC_VERSION__
648#endif
649
650#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
651#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
652#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
653
654#if ECB_CPP
655 #define ECB_EXTERN_C extern "C"
656 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
657 #define ECB_EXTERN_C_END }
658#else
659 #define ECB_EXTERN_C extern
660 #define ECB_EXTERN_C_BEG
661 #define ECB_EXTERN_C_END
662#endif
663
664/*****************************************************************************/
665
666/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
667/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
668
669#if ECB_NO_THREADS
670 #define ECB_NO_SMP 1
671#endif
672
673#if ECB_NO_SMP
674 #define ECB_MEMORY_FENCE do { } while (0)
675#endif
676
677/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
678#if __xlC__ && ECB_CPP
679 #include <builtins.h>
680#endif
681
682#if 1400 <= _MSC_VER
683 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
684#endif
685
686#ifndef ECB_MEMORY_FENCE
687 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
688 #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)
263# define expect(expr,value) __builtin_expect ((expr),(value)) 872 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
264# define noinline __attribute__ ((noinline))
265#else 873#else
266# define expect(expr,value) (expr) 874 #define ecb_expect(expr,value) (expr)
267# define noinline
268# if __STDC_VERSION__ < 199901L
269# define inline
270# endif 875#endif
271#endif
272 876
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. */
273#define expect_false(expr) expect ((expr) != 0, 0) 941#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
274#define expect_true(expr) expect ((expr) != 0, 1) 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
275#define inline_size static inline 1559#define inline_size ecb_inline
276 1560
277#if EV_MINIMAL 1561#if EV_FEATURE_CODE
278# define inline_speed static noinline
279#else
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
2256/* used to prepare libev internal fd's */
2257/* this is not fork-safe */
2258inline_speed void
2259fd_intern (int fd)
2260{
2261#ifdef _WIN32
2262 unsigned long arg = 1;
2263 ioctlsocket (EV_FD_TO_WIN32_HANDLE (fd), FIONBIO, &arg);
2264#else
2265 fcntl (fd, F_SETFD, FD_CLOEXEC);
2266 fcntl (fd, F_SETFL, O_NONBLOCK);
2267#endif
2268}
2269
705/*****************************************************************************/ 2270/*****************************************************************************/
706 2271
707void inline_speed 2272/*
708upheap (WT *heap, int k) 2273 * the heap functions want a real array index. array index 0 is guaranteed to not
709{ 2274 * be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
710 WT w = heap [k]; 2275 * the branching factor of the d-tree.
2276 */
711 2277
712 while (k) 2278/*
713 { 2279 * at the moment we allow libev the luxury of two heaps,
714 int p = (k - 1) >> 1; 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
715 2285
716 if (heap [p]->at <= w->at) 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
717 break; 2320 break;
718 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
719 heap [k] = heap [p]; 2384 heap [k] = heap [p];
720 ((W)heap [k])->active = k + 1; 2385 ev_active (ANHE_w (heap [k])) = k;
721 k = p; 2386 k = p;
722 } 2387 }
723 2388
724 heap [k] = w; 2389 heap [k] = he;
725 ((W)heap [k])->active = k + 1; 2390 ev_active (ANHE_w (he)) = k;
726} 2391}
727 2392
728void inline_speed 2393/* move an element suitably so it is in a correct place */
729downheap (WT *heap, int N, int k) 2394inline_size void
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) 2395adjustheap (ANHE *heap, int N, int k)
758{ 2396{
2397 if (k > HEAP0 && ANHE_at (heap [k]) <= ANHE_at (heap [HPARENT (k)]))
759 upheap (heap, k); 2398 upheap (heap, k);
2399 else
760 downheap (heap, N, k); 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);
761} 2413}
762 2414
763/*****************************************************************************/ 2415/*****************************************************************************/
764 2416
2417/* associate signal watchers to a signal signal */
765typedef struct 2418typedef struct
766{ 2419{
2420 EV_ATOMIC_T pending;
2421#if EV_MULTIPLICITY
2422 EV_P;
2423#endif
767 WL head; 2424 WL head;
768 sig_atomic_t volatile gotsig;
769} ANSIG; 2425} ANSIG;
770 2426
771static ANSIG *signals; 2427static ANSIG signals [EV_NSIG - 1];
772static int signalmax;
773 2428
774static int sigpipe [2]; 2429/*****************************************************************************/
775static sig_atomic_t volatile gotsig;
776static ev_io sigev;
777 2430
778void inline_size 2431#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
779signals_init (ANSIG *base, int count)
780{
781 while (count--)
782 {
783 base->head = 0;
784 base->gotsig = 0;
785 2432
786 ++base; 2433noinline ecb_cold
787 }
788}
789
790static void 2434static void
791sighandler (int signum) 2435evpipe_init (EV_P)
792{ 2436{
793#if _WIN32 2437 if (!ev_is_active (&pipe_w))
794 signal (signum, sighandler); 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)
795#endif 2448# endif
2449 {
2450 while (pipe (fds))
2451 ev_syserr ("(libev) error creating signal/async pipe");
796 2452
797 signals [signum - 1].gotsig = 1; 2453 fd_intern (fds [0]);
2454 }
798 2455
799 if (!gotsig) 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 */
800 { 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 {
801 int old_errno = errno; 2496 int old_errno;
802 gotsig = 1; 2497
803 write (sigpipe [1], &signum, 1); 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
804 errno = old_errno; 2523 errno = old_errno;
805 } 2524 }
806} 2525}
807 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
808void noinline 2622noinline
2623void
809ev_feed_signal_event (EV_P_ int signum) 2624ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
810{ 2625{
811 WL w; 2626 WL w;
812 2627
2628 if (expect_false (signum <= 0 || signum >= EV_NSIG))
2629 return;
2630
2631 --signum;
2632
813#if EV_MULTIPLICITY 2633#if EV_MULTIPLICITY
814 assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr)); 2634 /* it is permissible to try to feed a signal to the wrong loop */
815#endif 2635 /* or, likely more useful, feeding a signal nobody is waiting for */
816 2636
817 --signum; 2637 if (expect_false (signals [signum].loop != EV_A))
818
819 if (signum < 0 || signum >= signalmax)
820 return; 2638 return;
2639#endif
821 2640
822 signals [signum].gotsig = 0; 2641 signals [signum].pending = 0;
2642 ECB_MEMORY_FENCE_RELEASE;
823 2643
824 for (w = signals [signum].head; w; w = w->next) 2644 for (w = signals [signum].head; w; w = w->next)
825 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2645 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
826} 2646}
827 2647
2648#if EV_USE_SIGNALFD
828static void 2649static void
829sigcb (EV_P_ ev_io *iow, int revents) 2650sigfdcb (EV_P_ ev_io *iow, int revents)
830{ 2651{
831 int signum; 2652 struct signalfd_siginfo si[2], *sip; /* these structs are big */
832 2653
833 read (sigpipe [0], &revents, 1); 2654 for (;;)
834 gotsig = 0; 2655 {
2656 ssize_t res = read (sigfd, si, sizeof (si));
835 2657
836 for (signum = signalmax; signum--; ) 2658 /* not ISO-C, as res might be -1, but works with SuS */
837 if (signals [signum].gotsig) 2659 for (sip = si; (char *)sip < (char *)si + res; ++sip)
838 ev_feed_signal_event (EV_A_ signum + 1); 2660 ev_feed_signal_event (EV_A_ sip->ssi_signo);
839}
840 2661
841void inline_speed 2662 if (res < (ssize_t)sizeof (si))
842fd_intern (int fd) 2663 break;
843{ 2664 }
844#ifdef _WIN32
845 int arg = 1;
846 ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
847#else
848 fcntl (fd, F_SETFD, FD_CLOEXEC);
849 fcntl (fd, F_SETFL, O_NONBLOCK);
850#endif
851} 2665}
2666#endif
852 2667
853static void noinline 2668#endif
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 2669
864/*****************************************************************************/ 2670/*****************************************************************************/
865 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);
1171 sigcb (EV_A_ &sigev, EV_READ); 3142 /* iterate over everything, in case we missed something before */
3143 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1172 } 3144 }
3145#endif
1173 3146
1174 postfork = 0; 3147 postfork = 0;
1175} 3148}
1176 3149
1177#if EV_MULTIPLICITY 3150#if EV_MULTIPLICITY
3151
3152ecb_cold
1178struct ev_loop * 3153struct ev_loop *
1179ev_loop_new (unsigned int flags) 3154ev_loop_new (unsigned int flags) EV_NOEXCEPT
1180{ 3155{
1181 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));
1182 3157
1183 memset (loop, 0, sizeof (struct ev_loop)); 3158 memset (EV_A, 0, sizeof (struct ev_loop));
1184
1185 loop_init (EV_A_ flags); 3159 loop_init (EV_A_ flags);
1186 3160
1187 if (ev_backend (EV_A)) 3161 if (ev_backend (EV_A))
1188 return loop; 3162 return EV_A;
1189 3163
3164 ev_free (EV_A);
1190 return 0; 3165 return 0;
1191} 3166}
1192 3167
1193void 3168#endif /* multiplicity */
1194ev_loop_destroy (EV_P)
1195{
1196 loop_destroy (EV_A);
1197 ev_free (loop);
1198}
1199 3169
1200void 3170#if EV_VERIFY
1201ev_loop_fork (EV_P) 3171noinline ecb_cold
3172static void
3173verify_watcher (EV_P_ W w)
1202{ 3174{
1203 postfork = 1; /* must be in line with ev_default_fork */ 3175 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1204}
1205 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}
1206#endif 3294#endif
1207 3295
1208#if EV_MULTIPLICITY 3296#if EV_MULTIPLICITY
3297ecb_cold
1209struct ev_loop * 3298struct ev_loop *
1210ev_default_loop_init (unsigned int flags)
1211#else 3299#else
1212int 3300int
3301#endif
1213ev_default_loop (unsigned int flags) 3302ev_default_loop (unsigned int flags) EV_NOEXCEPT
1214#endif
1215{ 3303{
1216 if (sigpipe [0] == sigpipe [1])
1217 if (pipe (sigpipe))
1218 return 0;
1219
1220 if (!ev_default_loop_ptr) 3304 if (!ev_default_loop_ptr)
1221 { 3305 {
1222#if EV_MULTIPLICITY 3306#if EV_MULTIPLICITY
1223 struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct; 3307 EV_P = ev_default_loop_ptr = &default_loop_struct;
1224#else 3308#else
1225 ev_default_loop_ptr = 1; 3309 ev_default_loop_ptr = 1;
1226#endif 3310#endif
1227 3311
1228 loop_init (EV_A_ flags); 3312 loop_init (EV_A_ flags);
1229 3313
1230 if (ev_backend (EV_A)) 3314 if (ev_backend (EV_A))
1231 { 3315 {
1232 siginit (EV_A); 3316#if EV_CHILD_ENABLE
1233
1234#ifndef _WIN32
1235 ev_signal_init (&childev, childcb, SIGCHLD); 3317 ev_signal_init (&childev, childcb, SIGCHLD);
1236 ev_set_priority (&childev, EV_MAXPRI); 3318 ev_set_priority (&childev, EV_MAXPRI);
1237 ev_signal_start (EV_A_ &childev); 3319 ev_signal_start (EV_A_ &childev);
1238 ev_unref (EV_A); /* child watcher should not keep loop alive */ 3320 ev_unref (EV_A); /* child watcher should not keep loop alive */
1239#endif 3321#endif
… …
1244 3326
1245 return ev_default_loop_ptr; 3327 return ev_default_loop_ptr;
1246} 3328}
1247 3329
1248void 3330void
1249ev_default_destroy (void) 3331ev_loop_fork (EV_P) EV_NOEXCEPT
1250{ 3332{
1251#if EV_MULTIPLICITY 3333 postfork = 1;
1252 struct ev_loop *loop = ev_default_loop_ptr;
1253#endif
1254
1255#ifndef _WIN32
1256 ev_ref (EV_A); /* child watcher */
1257 ev_signal_stop (EV_A_ &childev);
1258#endif
1259
1260 ev_ref (EV_A); /* signal watcher */
1261 ev_io_stop (EV_A_ &sigev);
1262
1263 close (sigpipe [0]); sigpipe [0] = 0;
1264 close (sigpipe [1]); sigpipe [1] = 0;
1265
1266 loop_destroy (EV_A);
1267}
1268
1269void
1270ev_default_fork (void)
1271{
1272#if EV_MULTIPLICITY
1273 struct ev_loop *loop = ev_default_loop_ptr;
1274#endif
1275
1276 if (backend)
1277 postfork = 1; /* must be in line with ev_loop_fork */
1278} 3334}
1279 3335
1280/*****************************************************************************/ 3336/*****************************************************************************/
1281 3337
1282void 3338void
1283ev_invoke (EV_P_ void *w, int revents) 3339ev_invoke (EV_P_ void *w, int revents)
1284{ 3340{
1285 EV_CB_INVOKE ((W)w, revents); 3341 EV_CB_INVOKE ((W)w, revents);
1286} 3342}
1287 3343
1288void inline_speed 3344unsigned int
1289call_pending (EV_P) 3345ev_pending_count (EV_P) EV_NOEXCEPT
1290{ 3346{
1291 int pri; 3347 int pri;
3348 unsigned int count = 0;
1292 3349
1293 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 */
1294 while (pendingcnt [pri]) 3367 while (pendingcnt [pendingpri])
1295 {
1296 ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1297
1298 if (expect_true (p->w))
1299 {
1300 /*assert (("non-pending watcher on pending list", p->w->pending));*/
1301
1302 p->w->pending = 0;
1303 EV_CB_INVOKE (p->w, p->events);
1304 }
1305 }
1306}
1307
1308void inline_size
1309timers_reify (EV_P)
1310{
1311 while (timercnt && ((WT)timers [0])->at <= mn_now)
1312 {
1313 ev_timer *w = (ev_timer *)timers [0];
1314
1315 /*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1316
1317 /* first reschedule or stop timer */
1318 if (w->repeat)
1319 { 3368 {
1320 assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.)); 3369 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
1321 3370
1322 ((WT)w)->at += w->repeat; 3371 p->w->pending = 0;
1323 if (((WT)w)->at < mn_now) 3372 EV_CB_INVOKE (p->w, p->events);
1324 ((WT)w)->at = mn_now; 3373 EV_FREQUENT_CHECK;
1325
1326 downheap (timers, timercnt, 0);
1327 } 3374 }
1328 else
1329 ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1330
1331 ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1332 }
1333}
1334
1335#if EV_PERIODIC_ENABLE
1336void inline_size
1337periodics_reify (EV_P)
1338{
1339 while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1340 { 3375 }
1341 ev_periodic *w = (ev_periodic *)periodics [0]; 3376 while (pendingpri);
1342
1343 /*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1344
1345 /* first reschedule or stop timer */
1346 if (w->reschedule_cb)
1347 {
1348 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1349 assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1350 downheap (periodics, periodiccnt, 0);
1351 }
1352 else if (w->interval)
1353 {
1354 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1355 if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1356 assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1357 downheap (periodics, periodiccnt, 0);
1358 }
1359 else
1360 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1361
1362 ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1363 }
1364} 3377}
1365
1366static void noinline
1367periodics_reschedule (EV_P)
1368{
1369 int i;
1370
1371 /* adjust periodics after time jump */
1372 for (i = 0; i < periodiccnt; ++i)
1373 {
1374 ev_periodic *w = (ev_periodic *)periodics [i];
1375
1376 if (w->reschedule_cb)
1377 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1378 else if (w->interval)
1379 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1380 }
1381
1382 /* now rebuild the heap */
1383 for (i = periodiccnt >> 1; i--; )
1384 downheap (periodics, periodiccnt, i);
1385}
1386#endif
1387 3378
1388#if EV_IDLE_ENABLE 3379#if EV_IDLE_ENABLE
1389void inline_size 3380/* make idle watchers pending. this handles the "call-idle */
3381/* only when higher priorities are idle" logic */
3382inline_size void
1390idle_reify (EV_P) 3383idle_reify (EV_P)
1391{ 3384{
1392 if (expect_false (idleall)) 3385 if (expect_false (idleall))
1393 { 3386 {
1394 int pri; 3387 int pri;
… …
1406 } 3399 }
1407 } 3400 }
1408} 3401}
1409#endif 3402#endif
1410 3403
1411void 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
1412time_update (EV_P_ ev_tstamp max_block) 3554time_update (EV_P_ ev_tstamp max_block)
1413{ 3555{
1414 int i;
1415
1416#if EV_USE_MONOTONIC 3556#if EV_USE_MONOTONIC
1417 if (expect_true (have_monotonic)) 3557 if (expect_true (have_monotonic))
1418 { 3558 {
3559 int i;
1419 ev_tstamp odiff = rtmn_diff; 3560 ev_tstamp odiff = rtmn_diff;
1420 3561
1421 mn_now = get_clock (); 3562 mn_now = get_clock ();
1422 3563
1423 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */ 3564 /* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
… …
1439 * 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
1440 * in the unlikely event of having been preempted here. 3581 * in the unlikely event of having been preempted here.
1441 */ 3582 */
1442 for (i = 4; --i; ) 3583 for (i = 4; --i; )
1443 { 3584 {
3585 ev_tstamp diff;
1444 rtmn_diff = ev_rt_now - mn_now; 3586 rtmn_diff = ev_rt_now - mn_now;
1445 3587
1446 if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP) 3588 diff = odiff - rtmn_diff;
3589
3590 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
1447 return; /* all is well */ 3591 return; /* all is well */
1448 3592
1449 ev_rt_now = ev_time (); 3593 ev_rt_now = ev_time ();
1450 mn_now = get_clock (); 3594 mn_now = get_clock ();
1451 now_floor = mn_now; 3595 now_floor = mn_now;
1452 } 3596 }
1453 3597
3598 /* no timer adjustment, as the monotonic clock doesn't jump */
3599 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1454# if EV_PERIODIC_ENABLE 3600# if EV_PERIODIC_ENABLE
1455 periodics_reschedule (EV_A); 3601 periodics_reschedule (EV_A);
1456# endif 3602# endif
1457 /* no timer adjustment, as the monotonic clock doesn't jump */
1458 /* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1459 } 3603 }
1460 else 3604 else
1461#endif 3605#endif
1462 { 3606 {
1463 ev_rt_now = ev_time (); 3607 ev_rt_now = ev_time ();
1464 3608
1465 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))
1466 { 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);
1467#if EV_PERIODIC_ENABLE 3613#if EV_PERIODIC_ENABLE
1468 periodics_reschedule (EV_A); 3614 periodics_reschedule (EV_A);
1469#endif 3615#endif
1470 /* adjust timers. this is easy, as the offset is the same for all of them */
1471 for (i = 0; i < timercnt; ++i)
1472 ((WT)timers [i])->at += ev_rt_now - mn_now;
1473 } 3616 }
1474 3617
1475 mn_now = ev_rt_now; 3618 mn_now = ev_rt_now;
1476 } 3619 }
1477} 3620}
1478 3621
1479void 3622int
1480ev_ref (EV_P)
1481{
1482 ++activecnt;
1483}
1484
1485void
1486ev_unref (EV_P)
1487{
1488 --activecnt;
1489}
1490
1491static int loop_done;
1492
1493void
1494ev_loop (EV_P_ int flags) 3623ev_run (EV_P_ int flags)
1495{ 3624{
1496 loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) 3625#if EV_FEATURE_API
1497 ? EVUNLOOP_ONE 3626 ++loop_depth;
1498 : EVUNLOOP_CANCEL; 3627#endif
1499 3628
3629 assert (("libev: ev_loop recursion during release detected", loop_done != EVBREAK_RECURSE));
3630
3631 loop_done = EVBREAK_CANCEL;
3632
1500 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 */
1501 3634
1502 do 3635 do
1503 { 3636 {
3637#if EV_VERIFY >= 2
3638 ev_verify (EV_A);
3639#endif
3640
1504#ifndef _WIN32 3641#ifndef _WIN32
1505 if (expect_false (curpid)) /* penalise the forking check even more */ 3642 if (expect_false (curpid)) /* penalise the forking check even more */
1506 if (expect_false (getpid () != curpid)) 3643 if (expect_false (getpid () != curpid))
1507 { 3644 {
1508 curpid = getpid (); 3645 curpid = getpid ();
… …
1514 /* we might have forked, so queue fork handlers */ 3651 /* we might have forked, so queue fork handlers */
1515 if (expect_false (postfork)) 3652 if (expect_false (postfork))
1516 if (forkcnt) 3653 if (forkcnt)
1517 { 3654 {
1518 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK); 3655 queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
1519 call_pending (EV_A); 3656 EV_INVOKE_PENDING;
1520 } 3657 }
1521#endif 3658#endif
1522 3659
3660#if EV_PREPARE_ENABLE
1523 /* queue prepare watchers (and execute them) */ 3661 /* queue prepare watchers (and execute them) */
1524 if (expect_false (preparecnt)) 3662 if (expect_false (preparecnt))
1525 { 3663 {
1526 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE); 3664 queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1527 call_pending (EV_A); 3665 EV_INVOKE_PENDING;
1528 } 3666 }
3667#endif
1529 3668
1530 if (expect_false (!activecnt)) 3669 if (expect_false (loop_done))
1531 break; 3670 break;
1532 3671
1533 /* we might have forked, so reify kernel state if necessary */ 3672 /* we might have forked, so reify kernel state if necessary */
1534 if (expect_false (postfork)) 3673 if (expect_false (postfork))
1535 loop_fork (EV_A); 3674 loop_fork (EV_A);
… …
1540 /* calculate blocking time */ 3679 /* calculate blocking time */
1541 { 3680 {
1542 ev_tstamp waittime = 0.; 3681 ev_tstamp waittime = 0.;
1543 ev_tstamp sleeptime = 0.; 3682 ev_tstamp sleeptime = 0.;
1544 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
1545 if (expect_true (!(flags & EVLOOP_NONBLOCK || idleall || !activecnt))) 3695 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
1546 { 3696 {
1547 /* update time to cancel out callback processing overhead */
1548 time_update (EV_A_ 1e100);
1549
1550 waittime = MAX_BLOCKTIME; 3697 waittime = MAX_BLOCKTIME;
1551 3698
1552 if (timercnt) 3699 if (timercnt)
1553 { 3700 {
1554 ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge; 3701 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
1555 if (waittime > to) waittime = to; 3702 if (waittime > to) waittime = to;
1556 } 3703 }
1557 3704
1558#if EV_PERIODIC_ENABLE 3705#if EV_PERIODIC_ENABLE
1559 if (periodiccnt) 3706 if (periodiccnt)
1560 { 3707 {
1561 ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge; 3708 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
1562 if (waittime > to) waittime = to; 3709 if (waittime > to) waittime = to;
1563 } 3710 }
1564#endif 3711#endif
1565 3712
3713 /* don't let timeouts decrease the waittime below timeout_blocktime */
1566 if (expect_false (waittime < timeout_blocktime)) 3714 if (expect_false (waittime < timeout_blocktime))
1567 waittime = timeout_blocktime; 3715 waittime = timeout_blocktime;
1568 3716
1569 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;
1570 3721
3722 /* extra check because io_blocktime is commonly 0 */
1571 if (expect_true (sleeptime > io_blocktime)) 3723 if (expect_false (io_blocktime))
1572 sleeptime = io_blocktime;
1573
1574 if (sleeptime)
1575 { 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 {
1576 ev_sleep (sleeptime); 3732 ev_sleep (sleeptime);
1577 waittime -= sleeptime; 3733 waittime -= sleeptime;
3734 }
1578 } 3735 }
1579 } 3736 }
1580 3737
3738#if EV_FEATURE_API
1581 ++loop_count; 3739 ++loop_count;
3740#endif
3741 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
1582 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 }
3753
1583 3754
1584 /* update ev_rt_now, do magic */ 3755 /* update ev_rt_now, do magic */
1585 time_update (EV_A_ waittime + sleeptime); 3756 time_update (EV_A_ waittime + sleeptime);
1586 } 3757 }
1587 3758
… …
1594#if EV_IDLE_ENABLE 3765#if EV_IDLE_ENABLE
1595 /* queue idle watchers unless other events are pending */ 3766 /* queue idle watchers unless other events are pending */
1596 idle_reify (EV_A); 3767 idle_reify (EV_A);
1597#endif 3768#endif
1598 3769
3770#if EV_CHECK_ENABLE
1599 /* queue check watchers, to be executed first */ 3771 /* queue check watchers, to be executed first */
1600 if (expect_false (checkcnt)) 3772 if (expect_false (checkcnt))
1601 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK); 3773 queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
3774#endif
1602 3775
1603 call_pending (EV_A); 3776 EV_INVOKE_PENDING;
1604
1605 } 3777 }
1606 while (expect_true (activecnt && !loop_done)); 3778 while (expect_true (
3779 activecnt
3780 && !loop_done
3781 && !(flags & (EVRUN_ONCE | EVRUN_NOWAIT))
3782 ));
1607 3783
1608 if (loop_done == EVUNLOOP_ONE) 3784 if (loop_done == EVBREAK_ONE)
1609 loop_done = EVUNLOOP_CANCEL; 3785 loop_done = EVBREAK_CANCEL;
1610}
1611 3786
3787#if EV_FEATURE_API
3788 --loop_depth;
3789#endif
3790
3791 return activecnt;
3792}
3793
1612void 3794void
1613ev_unloop (EV_P_ int how) 3795ev_break (EV_P_ int how) EV_NOEXCEPT
1614{ 3796{
1615 loop_done = how; 3797 loop_done = how;
1616} 3798}
1617 3799
3800void
3801ev_ref (EV_P) EV_NOEXCEPT
3802{
3803 ++activecnt;
3804}
3805
3806void
3807ev_unref (EV_P) EV_NOEXCEPT
3808{
3809 --activecnt;
3810}
3811
3812void
3813ev_now_update (EV_P) EV_NOEXCEPT
3814{
3815 time_update (EV_A_ 1e100);
3816}
3817
3818void
3819ev_suspend (EV_P) EV_NOEXCEPT
3820{
3821 ev_now_update (EV_A);
3822}
3823
3824void
3825ev_resume (EV_P) EV_NOEXCEPT
3826{
3827 ev_tstamp mn_prev = mn_now;
3828
3829 ev_now_update (EV_A);
3830 timers_reschedule (EV_A_ mn_now - mn_prev);
3831#if EV_PERIODIC_ENABLE
3832 /* TODO: really do this? */
3833 periodics_reschedule (EV_A);
3834#endif
3835}
3836
1618/*****************************************************************************/ 3837/*****************************************************************************/
3838/* singly-linked list management, used when the expected list length is short */
1619 3839
1620void inline_size 3840inline_size void
1621wlist_add (WL *head, WL elem) 3841wlist_add (WL *head, WL elem)
1622{ 3842{
1623 elem->next = *head; 3843 elem->next = *head;
1624 *head = elem; 3844 *head = elem;
1625} 3845}
1626 3846
1627void inline_size 3847inline_size void
1628wlist_del (WL *head, WL elem) 3848wlist_del (WL *head, WL elem)
1629{ 3849{
1630 while (*head) 3850 while (*head)
1631 { 3851 {
1632 if (*head == elem) 3852 if (expect_true (*head == elem))
1633 { 3853 {
1634 *head = elem->next; 3854 *head = elem->next;
1635 return; 3855 break;
1636 } 3856 }
1637 3857
1638 head = &(*head)->next; 3858 head = &(*head)->next;
1639 } 3859 }
1640} 3860}
1641 3861
1642void inline_speed 3862/* internal, faster, version of ev_clear_pending */
3863inline_speed void
1643clear_pending (EV_P_ W w) 3864clear_pending (EV_P_ W w)
1644{ 3865{
1645 if (w->pending) 3866 if (w->pending)
1646 { 3867 {
1647 pendings [ABSPRI (w)][w->pending - 1].w = 0; 3868 pendings [ABSPRI (w)][w->pending - 1].w = (W)&pending_w;
1648 w->pending = 0; 3869 w->pending = 0;
1649 } 3870 }
1650} 3871}
1651 3872
1652int 3873int
1653ev_clear_pending (EV_P_ void *w) 3874ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
1654{ 3875{
1655 W w_ = (W)w; 3876 W w_ = (W)w;
1656 int pending = w_->pending; 3877 int pending = w_->pending;
1657 3878
1658 if (expect_true (pending)) 3879 if (expect_true (pending))
1659 { 3880 {
1660 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1; 3881 ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
3882 p->w = (W)&pending_w;
1661 w_->pending = 0; 3883 w_->pending = 0;
1662 p->w = 0;
1663 return p->events; 3884 return p->events;
1664 } 3885 }
1665 else 3886 else
1666 return 0; 3887 return 0;
1667} 3888}
1668 3889
1669void inline_size 3890inline_size void
1670pri_adjust (EV_P_ W w) 3891pri_adjust (EV_P_ W w)
1671{ 3892{
1672 int pri = w->priority; 3893 int pri = ev_priority (w);
1673 pri = pri < EV_MINPRI ? EV_MINPRI : pri; 3894 pri = pri < EV_MINPRI ? EV_MINPRI : pri;
1674 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri; 3895 pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
1675 w->priority = pri; 3896 ev_set_priority (w, pri);
1676} 3897}
1677 3898
1678void inline_speed 3899inline_speed void
1679ev_start (EV_P_ W w, int active) 3900ev_start (EV_P_ W w, int active)
1680{ 3901{
1681 pri_adjust (EV_A_ w); 3902 pri_adjust (EV_A_ w);
1682 w->active = active; 3903 w->active = active;
1683 ev_ref (EV_A); 3904 ev_ref (EV_A);
1684} 3905}
1685 3906
1686void inline_size 3907inline_size void
1687ev_stop (EV_P_ W w) 3908ev_stop (EV_P_ W w)
1688{ 3909{
1689 ev_unref (EV_A); 3910 ev_unref (EV_A);
1690 w->active = 0; 3911 w->active = 0;
1691} 3912}
1692 3913
1693/*****************************************************************************/ 3914/*****************************************************************************/
1694 3915
1695void noinline 3916noinline
3917void
1696ev_io_start (EV_P_ ev_io *w) 3918ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
1697{ 3919{
1698 int fd = w->fd; 3920 int fd = w->fd;
1699 3921
1700 if (expect_false (ev_is_active (w))) 3922 if (expect_false (ev_is_active (w)))
1701 return; 3923 return;
1702 3924
1703 assert (("ev_io_start called with negative fd", fd >= 0)); 3925 assert (("libev: ev_io_start called with negative fd", fd >= 0));
3926 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
3927
3928 EV_FREQUENT_CHECK;
1704 3929
1705 ev_start (EV_A_ (W)w, 1); 3930 ev_start (EV_A_ (W)w, 1);
1706 array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init); 3931 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
1707 wlist_add (&anfds[fd].head, (WL)w); 3932 wlist_add (&anfds[fd].head, (WL)w);
1708 3933
3934 /* common bug, apparently */
3935 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
3936
1709 fd_change (EV_A_ fd, w->events & EV_IOFDSET | 1); 3937 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
1710 w->events &= ~EV_IOFDSET; 3938 w->events &= ~EV__IOFDSET;
1711}
1712 3939
3940 EV_FREQUENT_CHECK;
3941}
3942
1713void noinline 3943noinline
3944void
1714ev_io_stop (EV_P_ ev_io *w) 3945ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
1715{ 3946{
1716 clear_pending (EV_A_ (W)w); 3947 clear_pending (EV_A_ (W)w);
1717 if (expect_false (!ev_is_active (w))) 3948 if (expect_false (!ev_is_active (w)))
1718 return; 3949 return;
1719 3950
1720 assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax)); 3951 assert (("libev: ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
3952
3953 EV_FREQUENT_CHECK;
1721 3954
1722 wlist_del (&anfds[w->fd].head, (WL)w); 3955 wlist_del (&anfds[w->fd].head, (WL)w);
1723 ev_stop (EV_A_ (W)w); 3956 ev_stop (EV_A_ (W)w);
1724 3957
1725 fd_change (EV_A_ w->fd, 1); 3958 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
1726}
1727 3959
3960 EV_FREQUENT_CHECK;
3961}
3962
1728void noinline 3963noinline
3964void
1729ev_timer_start (EV_P_ ev_timer *w) 3965ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
1730{ 3966{
1731 if (expect_false (ev_is_active (w))) 3967 if (expect_false (ev_is_active (w)))
1732 return; 3968 return;
1733 3969
1734 ((WT)w)->at += mn_now; 3970 ev_at (w) += mn_now;
1735 3971
1736 assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.)); 3972 assert (("libev: ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1737 3973
3974 EV_FREQUENT_CHECK;
3975
3976 ++timercnt;
1738 ev_start (EV_A_ (W)w, ++timercnt); 3977 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
1739 array_needsize (WT, timers, timermax, timercnt, EMPTY2); 3978 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
1740 timers [timercnt - 1] = (WT)w; 3979 ANHE_w (timers [ev_active (w)]) = (WT)w;
1741 upheap (timers, timercnt - 1); 3980 ANHE_at_cache (timers [ev_active (w)]);
3981 upheap (timers, ev_active (w));
1742 3982
3983 EV_FREQUENT_CHECK;
3984
1743 /*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/ 3985 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
1744} 3986}
1745 3987
1746void noinline 3988noinline
3989void
1747ev_timer_stop (EV_P_ ev_timer *w) 3990ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
1748{ 3991{
1749 clear_pending (EV_A_ (W)w); 3992 clear_pending (EV_A_ (W)w);
1750 if (expect_false (!ev_is_active (w))) 3993 if (expect_false (!ev_is_active (w)))
1751 return; 3994 return;
1752 3995
1753 assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w)); 3996 EV_FREQUENT_CHECK;
1754 3997
1755 { 3998 {
1756 int active = ((W)w)->active; 3999 int active = ev_active (w);
1757 4000
4001 assert (("libev: internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
4002
4003 --timercnt;
4004
1758 if (expect_true (--active < --timercnt)) 4005 if (expect_true (active < timercnt + HEAP0))
1759 { 4006 {
1760 timers [active] = timers [timercnt]; 4007 timers [active] = timers [timercnt + HEAP0];
1761 adjustheap (timers, timercnt, active); 4008 adjustheap (timers, timercnt, active);
1762 } 4009 }
1763 } 4010 }
1764 4011
1765 ((WT)w)->at -= mn_now; 4012 ev_at (w) -= mn_now;
1766 4013
1767 ev_stop (EV_A_ (W)w); 4014 ev_stop (EV_A_ (W)w);
1768}
1769 4015
4016 EV_FREQUENT_CHECK;
4017}
4018
1770void noinline 4019noinline
4020void
1771ev_timer_again (EV_P_ ev_timer *w) 4021ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
1772{ 4022{
4023 EV_FREQUENT_CHECK;
4024
4025 clear_pending (EV_A_ (W)w);
4026
1773 if (ev_is_active (w)) 4027 if (ev_is_active (w))
1774 { 4028 {
1775 if (w->repeat) 4029 if (w->repeat)
1776 { 4030 {
1777 ((WT)w)->at = mn_now + w->repeat; 4031 ev_at (w) = mn_now + w->repeat;
4032 ANHE_at_cache (timers [ev_active (w)]);
1778 adjustheap (timers, timercnt, ((W)w)->active - 1); 4033 adjustheap (timers, timercnt, ev_active (w));
1779 } 4034 }
1780 else 4035 else
1781 ev_timer_stop (EV_A_ w); 4036 ev_timer_stop (EV_A_ w);
1782 } 4037 }
1783 else if (w->repeat) 4038 else if (w->repeat)
1784 { 4039 {
1785 w->at = w->repeat; 4040 ev_at (w) = w->repeat;
1786 ev_timer_start (EV_A_ w); 4041 ev_timer_start (EV_A_ w);
1787 } 4042 }
4043
4044 EV_FREQUENT_CHECK;
4045}
4046
4047ev_tstamp
4048ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
4049{
4050 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
1788} 4051}
1789 4052
1790#if EV_PERIODIC_ENABLE 4053#if EV_PERIODIC_ENABLE
1791void noinline 4054noinline
4055void
1792ev_periodic_start (EV_P_ ev_periodic *w) 4056ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
1793{ 4057{
1794 if (expect_false (ev_is_active (w))) 4058 if (expect_false (ev_is_active (w)))
1795 return; 4059 return;
1796 4060
1797 if (w->reschedule_cb) 4061 if (w->reschedule_cb)
1798 ((WT)w)->at = w->reschedule_cb (w, ev_rt_now); 4062 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1799 else if (w->interval) 4063 else if (w->interval)
1800 { 4064 {
1801 assert (("ev_periodic_start called with negative interval value", w->interval >= 0.)); 4065 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
1802 /* this formula differs from the one in periodic_reify because we do not always round up */ 4066 periodic_recalc (EV_A_ w);
1803 ((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1804 } 4067 }
1805 else 4068 else
1806 ((WT)w)->at = w->offset; 4069 ev_at (w) = w->offset;
1807 4070
4071 EV_FREQUENT_CHECK;
4072
4073 ++periodiccnt;
1808 ev_start (EV_A_ (W)w, ++periodiccnt); 4074 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
1809 array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2); 4075 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
1810 periodics [periodiccnt - 1] = (WT)w; 4076 ANHE_w (periodics [ev_active (w)]) = (WT)w;
1811 upheap (periodics, periodiccnt - 1); 4077 ANHE_at_cache (periodics [ev_active (w)]);
4078 upheap (periodics, ev_active (w));
1812 4079
4080 EV_FREQUENT_CHECK;
4081
1813 /*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/ 4082 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
1814} 4083}
1815 4084
1816void noinline 4085noinline
4086void
1817ev_periodic_stop (EV_P_ ev_periodic *w) 4087ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
1818{ 4088{
1819 clear_pending (EV_A_ (W)w); 4089 clear_pending (EV_A_ (W)w);
1820 if (expect_false (!ev_is_active (w))) 4090 if (expect_false (!ev_is_active (w)))
1821 return; 4091 return;
1822 4092
1823 assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w)); 4093 EV_FREQUENT_CHECK;
1824 4094
1825 { 4095 {
1826 int active = ((W)w)->active; 4096 int active = ev_active (w);
1827 4097
4098 assert (("libev: internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
4099
4100 --periodiccnt;
4101
1828 if (expect_true (--active < --periodiccnt)) 4102 if (expect_true (active < periodiccnt + HEAP0))
1829 { 4103 {
1830 periodics [active] = periodics [periodiccnt]; 4104 periodics [active] = periodics [periodiccnt + HEAP0];
1831 adjustheap (periodics, periodiccnt, active); 4105 adjustheap (periodics, periodiccnt, active);
1832 } 4106 }
1833 } 4107 }
1834 4108
1835 ev_stop (EV_A_ (W)w); 4109 ev_stop (EV_A_ (W)w);
1836}
1837 4110
4111 EV_FREQUENT_CHECK;
4112}
4113
1838void noinline 4114noinline
4115void
1839ev_periodic_again (EV_P_ ev_periodic *w) 4116ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
1840{ 4117{
1841 /* TODO: use adjustheap and recalculation */ 4118 /* TODO: use adjustheap and recalculation */
1842 ev_periodic_stop (EV_A_ w); 4119 ev_periodic_stop (EV_A_ w);
1843 ev_periodic_start (EV_A_ w); 4120 ev_periodic_start (EV_A_ w);
1844} 4121}
… …
1846 4123
1847#ifndef SA_RESTART 4124#ifndef SA_RESTART
1848# define SA_RESTART 0 4125# define SA_RESTART 0
1849#endif 4126#endif
1850 4127
4128#if EV_SIGNAL_ENABLE
4129
1851void noinline 4130noinline
4131void
1852ev_signal_start (EV_P_ ev_signal *w) 4132ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
1853{ 4133{
1854#if EV_MULTIPLICITY
1855 assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1856#endif
1857 if (expect_false (ev_is_active (w))) 4134 if (expect_false (ev_is_active (w)))
1858 return; 4135 return;
1859 4136
1860 assert (("ev_signal_start called with illegal signal number", w->signum > 0)); 4137 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
1861 4138
4139#if EV_MULTIPLICITY
4140 assert (("libev: a signal must not be attached to two different loops",
4141 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
4142
4143 signals [w->signum - 1].loop = EV_A;
4144 ECB_MEMORY_FENCE_RELEASE;
4145#endif
4146
4147 EV_FREQUENT_CHECK;
4148
4149#if EV_USE_SIGNALFD
4150 if (sigfd == -2)
1862 { 4151 {
1863#ifndef _WIN32 4152 sigfd = signalfd (-1, &sigfd_set, SFD_NONBLOCK | SFD_CLOEXEC);
1864 sigset_t full, prev; 4153 if (sigfd < 0 && errno == EINVAL)
1865 sigfillset (&full); 4154 sigfd = signalfd (-1, &sigfd_set, 0); /* retry without flags */
1866 sigprocmask (SIG_SETMASK, &full, &prev);
1867#endif
1868 4155
1869 array_needsize (ANSIG, signals, signalmax, w->signum, signals_init); 4156 if (sigfd >= 0)
4157 {
4158 fd_intern (sigfd); /* doing it twice will not hurt */
1870 4159
1871#ifndef _WIN32 4160 sigemptyset (&sigfd_set);
1872 sigprocmask (SIG_SETMASK, &prev, 0); 4161
1873#endif 4162 ev_io_init (&sigfd_w, sigfdcb, sigfd, EV_READ);
4163 ev_set_priority (&sigfd_w, EV_MAXPRI);
4164 ev_io_start (EV_A_ &sigfd_w);
4165 ev_unref (EV_A); /* signalfd watcher should not keep loop alive */
4166 }
1874 } 4167 }
4168
4169 if (sigfd >= 0)
4170 {
4171 /* TODO: check .head */
4172 sigaddset (&sigfd_set, w->signum);
4173 sigprocmask (SIG_BLOCK, &sigfd_set, 0);
4174
4175 signalfd (sigfd, &sigfd_set, 0);
4176 }
4177#endif
1875 4178
1876 ev_start (EV_A_ (W)w, 1); 4179 ev_start (EV_A_ (W)w, 1);
1877 wlist_add (&signals [w->signum - 1].head, (WL)w); 4180 wlist_add (&signals [w->signum - 1].head, (WL)w);
1878 4181
1879 if (!((WL)w)->next) 4182 if (!((WL)w)->next)
4183# if EV_USE_SIGNALFD
4184 if (sigfd < 0) /*TODO*/
4185# endif
1880 { 4186 {
1881#if _WIN32 4187# ifdef _WIN32
4188 evpipe_init (EV_A);
4189
1882 signal (w->signum, sighandler); 4190 signal (w->signum, ev_sighandler);
1883#else 4191# else
1884 struct sigaction sa; 4192 struct sigaction sa;
4193
4194 evpipe_init (EV_A);
4195
1885 sa.sa_handler = sighandler; 4196 sa.sa_handler = ev_sighandler;
1886 sigfillset (&sa.sa_mask); 4197 sigfillset (&sa.sa_mask);
1887 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4198 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1888 sigaction (w->signum, &sa, 0); 4199 sigaction (w->signum, &sa, 0);
4200
4201 if (origflags & EVFLAG_NOSIGMASK)
4202 {
4203 sigemptyset (&sa.sa_mask);
4204 sigaddset (&sa.sa_mask, w->signum);
4205 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4206 }
1889#endif 4207#endif
1890 } 4208 }
1891}
1892 4209
4210 EV_FREQUENT_CHECK;
4211}
4212
1893void noinline 4213noinline
4214void
1894ev_signal_stop (EV_P_ ev_signal *w) 4215ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
1895{ 4216{
1896 clear_pending (EV_A_ (W)w); 4217 clear_pending (EV_A_ (W)w);
1897 if (expect_false (!ev_is_active (w))) 4218 if (expect_false (!ev_is_active (w)))
1898 return; 4219 return;
1899 4220
4221 EV_FREQUENT_CHECK;
4222
1900 wlist_del (&signals [w->signum - 1].head, (WL)w); 4223 wlist_del (&signals [w->signum - 1].head, (WL)w);
1901 ev_stop (EV_A_ (W)w); 4224 ev_stop (EV_A_ (W)w);
1902 4225
1903 if (!signals [w->signum - 1].head) 4226 if (!signals [w->signum - 1].head)
1904 signal (w->signum, SIG_DFL); 4227 {
1905}
1906
1907void
1908ev_child_start (EV_P_ ev_child *w)
1909{
1910#if EV_MULTIPLICITY 4228#if EV_MULTIPLICITY
4229 signals [w->signum - 1].loop = 0; /* unattach from signal */
4230#endif
4231#if EV_USE_SIGNALFD
4232 if (sigfd >= 0)
4233 {
4234 sigset_t ss;
4235
4236 sigemptyset (&ss);
4237 sigaddset (&ss, w->signum);
4238 sigdelset (&sigfd_set, w->signum);
4239
4240 signalfd (sigfd, &sigfd_set, 0);
4241 sigprocmask (SIG_UNBLOCK, &ss, 0);
4242 }
4243 else
4244#endif
4245 signal (w->signum, SIG_DFL);
4246 }
4247
4248 EV_FREQUENT_CHECK;
4249}
4250
4251#endif
4252
4253#if EV_CHILD_ENABLE
4254
4255void
4256ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
4257{
4258#if EV_MULTIPLICITY
1911 assert (("child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4259 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1912#endif 4260#endif
1913 if (expect_false (ev_is_active (w))) 4261 if (expect_false (ev_is_active (w)))
1914 return; 4262 return;
1915 4263
4264 EV_FREQUENT_CHECK;
4265
1916 ev_start (EV_A_ (W)w, 1); 4266 ev_start (EV_A_ (W)w, 1);
1917 wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4267 wlist_add (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1918}
1919 4268
4269 EV_FREQUENT_CHECK;
4270}
4271
1920void 4272void
1921ev_child_stop (EV_P_ ev_child *w) 4273ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
1922{ 4274{
1923 clear_pending (EV_A_ (W)w); 4275 clear_pending (EV_A_ (W)w);
1924 if (expect_false (!ev_is_active (w))) 4276 if (expect_false (!ev_is_active (w)))
1925 return; 4277 return;
1926 4278
4279 EV_FREQUENT_CHECK;
4280
1927 wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w); 4281 wlist_del (&childs [w->pid & ((EV_PID_HASHSIZE) - 1)], (WL)w);
1928 ev_stop (EV_A_ (W)w); 4282 ev_stop (EV_A_ (W)w);
4283
4284 EV_FREQUENT_CHECK;
1929} 4285}
4286
4287#endif
1930 4288
1931#if EV_STAT_ENABLE 4289#if EV_STAT_ENABLE
1932 4290
1933# ifdef _WIN32 4291# ifdef _WIN32
1934# undef lstat 4292# undef lstat
1935# define lstat(a,b) _stati64 (a,b) 4293# define lstat(a,b) _stati64 (a,b)
1936# endif 4294# endif
1937 4295
1938#define DEF_STAT_INTERVAL 5.0074891 4296#define DEF_STAT_INTERVAL 5.0074891
4297#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
1939#define MIN_STAT_INTERVAL 0.1074891 4298#define MIN_STAT_INTERVAL 0.1074891
1940 4299
1941static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4300noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
1942 4301
1943#if EV_USE_INOTIFY 4302#if EV_USE_INOTIFY
1944# define EV_INOTIFY_BUFSIZE 8192
1945 4303
1946static void noinline 4304/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
4305# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
4306
4307noinline
4308static void
1947infy_add (EV_P_ ev_stat *w) 4309infy_add (EV_P_ ev_stat *w)
1948{ 4310{
1949 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); 4311 w->wd = inotify_add_watch (fs_fd, w->path,
4312 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4313 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4314 | IN_DONT_FOLLOW | IN_MASK_ADD);
1950 4315
1951 if (w->wd < 0) 4316 if (w->wd >= 0)
4317 {
4318 struct statfs sfs;
4319
4320 /* now local changes will be tracked by inotify, but remote changes won't */
4321 /* unless the filesystem is known to be local, we therefore still poll */
4322 /* also do poll on <2.6.25, but with normal frequency */
4323
4324 if (!fs_2625)
4325 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4326 else if (!statfs (w->path, &sfs)
4327 && (sfs.f_type == 0x1373 /* devfs */
4328 || sfs.f_type == 0x4006 /* fat */
4329 || sfs.f_type == 0x4d44 /* msdos */
4330 || sfs.f_type == 0xEF53 /* ext2/3 */
4331 || sfs.f_type == 0x72b6 /* jffs2 */
4332 || sfs.f_type == 0x858458f6 /* ramfs */
4333 || sfs.f_type == 0x5346544e /* ntfs */
4334 || sfs.f_type == 0x3153464a /* jfs */
4335 || sfs.f_type == 0x9123683e /* btrfs */
4336 || sfs.f_type == 0x52654973 /* reiser3 */
4337 || sfs.f_type == 0x01021994 /* tmpfs */
4338 || sfs.f_type == 0x58465342 /* xfs */))
4339 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
4340 else
4341 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
1952 { 4342 }
1953 ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */ 4343 else
4344 {
4345 /* can't use inotify, continue to stat */
4346 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
1954 4347
1955 /* monitor some parent directory for speedup hints */ 4348 /* if path is not there, monitor some parent directory for speedup hints */
4349 /* note that exceeding the hardcoded path limit is not a correctness issue, */
4350 /* but an efficiency issue only */
1956 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096) 4351 if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
1957 { 4352 {
1958 char path [4096]; 4353 char path [4096];
1959 strcpy (path, w->path); 4354 strcpy (path, w->path);
1960 4355
… …
1963 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF 4358 int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
1964 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO); 4359 | (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
1965 4360
1966 char *pend = strrchr (path, '/'); 4361 char *pend = strrchr (path, '/');
1967 4362
1968 if (!pend) 4363 if (!pend || pend == path)
1969 break; /* whoops, no '/', complain to your admin */ 4364 break;
1970 4365
1971 *pend = 0; 4366 *pend = 0;
1972 w->wd = inotify_add_watch (fs_fd, path, mask); 4367 w->wd = inotify_add_watch (fs_fd, path, mask);
1973 } 4368 }
1974 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4369 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
1975 } 4370 }
1976 } 4371 }
1977 else
1978 ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
1979 4372
1980 if (w->wd >= 0) 4373 if (w->wd >= 0)
1981 wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w); 4374 wlist_add (&fs_hash [w->wd & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
1982}
1983 4375
1984static void noinline 4376 /* now re-arm timer, if required */
4377 if (ev_is_active (&w->timer)) ev_ref (EV_A);
4378 ev_timer_again (EV_A_ &w->timer);
4379 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4380}
4381
4382noinline
4383static void
1985infy_del (EV_P_ ev_stat *w) 4384infy_del (EV_P_ ev_stat *w)
1986{ 4385{
1987 int slot; 4386 int slot;
1988 int wd = w->wd; 4387 int wd = w->wd;
1989 4388
1990 if (wd < 0) 4389 if (wd < 0)
1991 return; 4390 return;
1992 4391
1993 w->wd = -2; 4392 w->wd = -2;
1994 slot = wd & (EV_INOTIFY_HASHSIZE - 1); 4393 slot = wd & ((EV_INOTIFY_HASHSIZE) - 1);
1995 wlist_del (&fs_hash [slot].head, (WL)w); 4394 wlist_del (&fs_hash [slot].head, (WL)w);
1996 4395
1997 /* remove this watcher, if others are watching it, they will rearm */ 4396 /* remove this watcher, if others are watching it, they will rearm */
1998 inotify_rm_watch (fs_fd, wd); 4397 inotify_rm_watch (fs_fd, wd);
1999} 4398}
2000 4399
2001static void noinline 4400noinline
4401static void
2002infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4402infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
2003{ 4403{
2004 if (slot < 0) 4404 if (slot < 0)
2005 /* overflow, need to check for all hahs slots */ 4405 /* overflow, need to check for all hash slots */
2006 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4406 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2007 infy_wd (EV_A_ slot, wd, ev); 4407 infy_wd (EV_A_ slot, wd, ev);
2008 else 4408 else
2009 { 4409 {
2010 WL w_; 4410 WL w_;
2011 4411
2012 for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; ) 4412 for (w_ = fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head; w_; )
2013 { 4413 {
2014 ev_stat *w = (ev_stat *)w_; 4414 ev_stat *w = (ev_stat *)w_;
2015 w_ = w_->next; /* lets us remove this watcher and all before it */ 4415 w_ = w_->next; /* lets us remove this watcher and all before it */
2016 4416
2017 if (w->wd == wd || wd == -1) 4417 if (w->wd == wd || wd == -1)
2018 { 4418 {
2019 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF)) 4419 if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
2020 { 4420 {
4421 wlist_del (&fs_hash [slot & ((EV_INOTIFY_HASHSIZE) - 1)].head, (WL)w);
2021 w->wd = -1; 4422 w->wd = -1;
2022 infy_add (EV_A_ w); /* re-add, no matter what */ 4423 infy_add (EV_A_ w); /* re-add, no matter what */
2023 } 4424 }
2024 4425
2025 stat_timer_cb (EV_A_ &w->timer, 0); 4426 stat_timer_cb (EV_A_ &w->timer, 0);
… …
2030 4431
2031static void 4432static void
2032infy_cb (EV_P_ ev_io *w, int revents) 4433infy_cb (EV_P_ ev_io *w, int revents)
2033{ 4434{
2034 char buf [EV_INOTIFY_BUFSIZE]; 4435 char buf [EV_INOTIFY_BUFSIZE];
2035 struct inotify_event *ev = (struct inotify_event *)buf;
2036 int ofs; 4436 int ofs;
2037 int len = read (fs_fd, buf, sizeof (buf)); 4437 int len = read (fs_fd, buf, sizeof (buf));
2038 4438
2039 for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len) 4439 for (ofs = 0; ofs < len; )
4440 {
4441 struct inotify_event *ev = (struct inotify_event *)(buf + ofs);
2040 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4442 infy_wd (EV_A_ ev->wd, ev->wd, ev);
4443 ofs += sizeof (struct inotify_event) + ev->len;
4444 }
2041} 4445}
2042 4446
2043void inline_size 4447inline_size ecb_cold
4448void
4449ev_check_2625 (EV_P)
4450{
4451 /* kernels < 2.6.25 are borked
4452 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
4453 */
4454 if (ev_linux_version () < 0x020619)
4455 return;
4456
4457 fs_2625 = 1;
4458}
4459
4460inline_size int
4461infy_newfd (void)
4462{
4463#if defined IN_CLOEXEC && defined IN_NONBLOCK
4464 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
4465 if (fd >= 0)
4466 return fd;
4467#endif
4468 return inotify_init ();
4469}
4470
4471inline_size void
2044infy_init (EV_P) 4472infy_init (EV_P)
2045{ 4473{
2046 if (fs_fd != -2) 4474 if (fs_fd != -2)
2047 return; 4475 return;
2048 4476
4477 fs_fd = -1;
4478
4479 ev_check_2625 (EV_A);
4480
2049 fs_fd = inotify_init (); 4481 fs_fd = infy_newfd ();
2050 4482
2051 if (fs_fd >= 0) 4483 if (fs_fd >= 0)
2052 { 4484 {
4485 fd_intern (fs_fd);
2053 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ); 4486 ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
2054 ev_set_priority (&fs_w, EV_MAXPRI); 4487 ev_set_priority (&fs_w, EV_MAXPRI);
2055 ev_io_start (EV_A_ &fs_w); 4488 ev_io_start (EV_A_ &fs_w);
4489 ev_unref (EV_A);
2056 } 4490 }
2057} 4491}
2058 4492
2059void inline_size 4493inline_size void
2060infy_fork (EV_P) 4494infy_fork (EV_P)
2061{ 4495{
2062 int slot; 4496 int slot;
2063 4497
2064 if (fs_fd < 0) 4498 if (fs_fd < 0)
2065 return; 4499 return;
2066 4500
4501 ev_ref (EV_A);
4502 ev_io_stop (EV_A_ &fs_w);
2067 close (fs_fd); 4503 close (fs_fd);
2068 fs_fd = inotify_init (); 4504 fs_fd = infy_newfd ();
2069 4505
4506 if (fs_fd >= 0)
4507 {
4508 fd_intern (fs_fd);
4509 ev_io_set (&fs_w, fs_fd, EV_READ);
4510 ev_io_start (EV_A_ &fs_w);
4511 ev_unref (EV_A);
4512 }
4513
2070 for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot) 4514 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
2071 { 4515 {
2072 WL w_ = fs_hash [slot].head; 4516 WL w_ = fs_hash [slot].head;
2073 fs_hash [slot].head = 0; 4517 fs_hash [slot].head = 0;
2074 4518
2075 while (w_) 4519 while (w_)
… …
2080 w->wd = -1; 4524 w->wd = -1;
2081 4525
2082 if (fs_fd >= 0) 4526 if (fs_fd >= 0)
2083 infy_add (EV_A_ w); /* re-add, no matter what */ 4527 infy_add (EV_A_ w); /* re-add, no matter what */
2084 else 4528 else
4529 {
4530 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
4531 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2085 ev_timer_start (EV_A_ &w->timer); 4532 ev_timer_again (EV_A_ &w->timer);
4533 if (ev_is_active (&w->timer)) ev_unref (EV_A);
4534 }
2086 } 4535 }
2087
2088 } 4536 }
2089} 4537}
2090 4538
2091#endif 4539#endif
2092 4540
4541#ifdef _WIN32
4542# define EV_LSTAT(p,b) _stati64 (p, b)
4543#else
4544# define EV_LSTAT(p,b) lstat (p, b)
4545#endif
4546
2093void 4547void
2094ev_stat_stat (EV_P_ ev_stat *w) 4548ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
2095{ 4549{
2096 if (lstat (w->path, &w->attr) < 0) 4550 if (lstat (w->path, &w->attr) < 0)
2097 w->attr.st_nlink = 0; 4551 w->attr.st_nlink = 0;
2098 else if (!w->attr.st_nlink) 4552 else if (!w->attr.st_nlink)
2099 w->attr.st_nlink = 1; 4553 w->attr.st_nlink = 1;
2100} 4554}
2101 4555
2102static void noinline 4556noinline
4557static void
2103stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4558stat_timer_cb (EV_P_ ev_timer *w_, int revents)
2104{ 4559{
2105 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4560 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
2106 4561
2107 /* we copy this here each the time so that */ 4562 ev_statdata prev = w->attr;
2108 /* prev has the old value when the callback gets invoked */
2109 w->prev = w->attr;
2110 ev_stat_stat (EV_A_ w); 4563 ev_stat_stat (EV_A_ w);
2111 4564
2112 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */ 4565 /* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
2113 if ( 4566 if (
2114 w->prev.st_dev != w->attr.st_dev 4567 prev.st_dev != w->attr.st_dev
2115 || w->prev.st_ino != w->attr.st_ino 4568 || prev.st_ino != w->attr.st_ino
2116 || w->prev.st_mode != w->attr.st_mode 4569 || prev.st_mode != w->attr.st_mode
2117 || w->prev.st_nlink != w->attr.st_nlink 4570 || prev.st_nlink != w->attr.st_nlink
2118 || w->prev.st_uid != w->attr.st_uid 4571 || prev.st_uid != w->attr.st_uid
2119 || w->prev.st_gid != w->attr.st_gid 4572 || prev.st_gid != w->attr.st_gid
2120 || w->prev.st_rdev != w->attr.st_rdev 4573 || prev.st_rdev != w->attr.st_rdev
2121 || w->prev.st_size != w->attr.st_size 4574 || prev.st_size != w->attr.st_size
2122 || w->prev.st_atime != w->attr.st_atime 4575 || prev.st_atime != w->attr.st_atime
2123 || w->prev.st_mtime != w->attr.st_mtime 4576 || prev.st_mtime != w->attr.st_mtime
2124 || w->prev.st_ctime != w->attr.st_ctime 4577 || prev.st_ctime != w->attr.st_ctime
2125 ) { 4578 ) {
4579 /* we only update w->prev on actual differences */
4580 /* in case we test more often than invoke the callback, */
4581 /* to ensure that prev is always different to attr */
4582 w->prev = prev;
4583
2126 #if EV_USE_INOTIFY 4584 #if EV_USE_INOTIFY
4585 if (fs_fd >= 0)
4586 {
2127 infy_del (EV_A_ w); 4587 infy_del (EV_A_ w);
2128 infy_add (EV_A_ w); 4588 infy_add (EV_A_ w);
2129 ev_stat_stat (EV_A_ w); /* avoid race... */ 4589 ev_stat_stat (EV_A_ w); /* avoid race... */
4590 }
2130 #endif 4591 #endif
2131 4592
2132 ev_feed_event (EV_A_ w, EV_STAT); 4593 ev_feed_event (EV_A_ w, EV_STAT);
2133 } 4594 }
2134} 4595}
2135 4596
2136void 4597void
2137ev_stat_start (EV_P_ ev_stat *w) 4598ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
2138{ 4599{
2139 if (expect_false (ev_is_active (w))) 4600 if (expect_false (ev_is_active (w)))
2140 return; 4601 return;
2141 4602
2142 /* since we use memcmp, we need to clear any padding data etc. */
2143 memset (&w->prev, 0, sizeof (ev_statdata));
2144 memset (&w->attr, 0, sizeof (ev_statdata));
2145
2146 ev_stat_stat (EV_A_ w); 4603 ev_stat_stat (EV_A_ w);
2147 4604
4605 if (w->interval < MIN_STAT_INTERVAL && w->interval)
2148 if (w->interval < MIN_STAT_INTERVAL) 4606 w->interval = MIN_STAT_INTERVAL;
2149 w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
2150 4607
2151 ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval); 4608 ev_timer_init (&w->timer, stat_timer_cb, 0., w->interval ? w->interval : DEF_STAT_INTERVAL);
2152 ev_set_priority (&w->timer, ev_priority (w)); 4609 ev_set_priority (&w->timer, ev_priority (w));
2153 4610
2154#if EV_USE_INOTIFY 4611#if EV_USE_INOTIFY
2155 infy_init (EV_A); 4612 infy_init (EV_A);
2156 4613
2157 if (fs_fd >= 0) 4614 if (fs_fd >= 0)
2158 infy_add (EV_A_ w); 4615 infy_add (EV_A_ w);
2159 else 4616 else
2160#endif 4617#endif
4618 {
2161 ev_timer_start (EV_A_ &w->timer); 4619 ev_timer_again (EV_A_ &w->timer);
4620 ev_unref (EV_A);
4621 }
2162 4622
2163 ev_start (EV_A_ (W)w, 1); 4623 ev_start (EV_A_ (W)w, 1);
2164}
2165 4624
4625 EV_FREQUENT_CHECK;
4626}
4627
2166void 4628void
2167ev_stat_stop (EV_P_ ev_stat *w) 4629ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
2168{ 4630{
2169 clear_pending (EV_A_ (W)w); 4631 clear_pending (EV_A_ (W)w);
2170 if (expect_false (!ev_is_active (w))) 4632 if (expect_false (!ev_is_active (w)))
2171 return; 4633 return;
2172 4634
4635 EV_FREQUENT_CHECK;
4636
2173#if EV_USE_INOTIFY 4637#if EV_USE_INOTIFY
2174 infy_del (EV_A_ w); 4638 infy_del (EV_A_ w);
2175#endif 4639#endif
4640
4641 if (ev_is_active (&w->timer))
4642 {
4643 ev_ref (EV_A);
2176 ev_timer_stop (EV_A_ &w->timer); 4644 ev_timer_stop (EV_A_ &w->timer);
4645 }
2177 4646
2178 ev_stop (EV_A_ (W)w); 4647 ev_stop (EV_A_ (W)w);
4648
4649 EV_FREQUENT_CHECK;
2179} 4650}
2180#endif 4651#endif
2181 4652
2182#if EV_IDLE_ENABLE 4653#if EV_IDLE_ENABLE
2183void 4654void
2184ev_idle_start (EV_P_ ev_idle *w) 4655ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
2185{ 4656{
2186 if (expect_false (ev_is_active (w))) 4657 if (expect_false (ev_is_active (w)))
2187 return; 4658 return;
2188 4659
2189 pri_adjust (EV_A_ (W)w); 4660 pri_adjust (EV_A_ (W)w);
2190 4661
4662 EV_FREQUENT_CHECK;
4663
2191 { 4664 {
2192 int active = ++idlecnt [ABSPRI (w)]; 4665 int active = ++idlecnt [ABSPRI (w)];
2193 4666
2194 ++idleall; 4667 ++idleall;
2195 ev_start (EV_A_ (W)w, active); 4668 ev_start (EV_A_ (W)w, active);
2196 4669
2197 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4670 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
2198 idles [ABSPRI (w)][active - 1] = w; 4671 idles [ABSPRI (w)][active - 1] = w;
2199 } 4672 }
2200}
2201 4673
4674 EV_FREQUENT_CHECK;
4675}
4676
2202void 4677void
2203ev_idle_stop (EV_P_ ev_idle *w) 4678ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
2204{ 4679{
2205 clear_pending (EV_A_ (W)w); 4680 clear_pending (EV_A_ (W)w);
2206 if (expect_false (!ev_is_active (w))) 4681 if (expect_false (!ev_is_active (w)))
2207 return; 4682 return;
2208 4683
4684 EV_FREQUENT_CHECK;
4685
2209 { 4686 {
2210 int active = ((W)w)->active; 4687 int active = ev_active (w);
2211 4688
2212 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]]; 4689 idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2213 ((W)idles [ABSPRI (w)][active - 1])->active = active; 4690 ev_active (idles [ABSPRI (w)][active - 1]) = active;
2214 4691
2215 ev_stop (EV_A_ (W)w); 4692 ev_stop (EV_A_ (W)w);
2216 --idleall; 4693 --idleall;
2217 } 4694 }
2218}
2219#endif
2220 4695
4696 EV_FREQUENT_CHECK;
4697}
4698#endif
4699
4700#if EV_PREPARE_ENABLE
2221void 4701void
2222ev_prepare_start (EV_P_ ev_prepare *w) 4702ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
2223{ 4703{
2224 if (expect_false (ev_is_active (w))) 4704 if (expect_false (ev_is_active (w)))
2225 return; 4705 return;
2226 4706
4707 EV_FREQUENT_CHECK;
4708
2227 ev_start (EV_A_ (W)w, ++preparecnt); 4709 ev_start (EV_A_ (W)w, ++preparecnt);
2228 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4710 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
2229 prepares [preparecnt - 1] = w; 4711 prepares [preparecnt - 1] = w;
2230}
2231 4712
4713 EV_FREQUENT_CHECK;
4714}
4715
2232void 4716void
2233ev_prepare_stop (EV_P_ ev_prepare *w) 4717ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
2234{ 4718{
2235 clear_pending (EV_A_ (W)w); 4719 clear_pending (EV_A_ (W)w);
2236 if (expect_false (!ev_is_active (w))) 4720 if (expect_false (!ev_is_active (w)))
2237 return; 4721 return;
2238 4722
4723 EV_FREQUENT_CHECK;
4724
2239 { 4725 {
2240 int active = ((W)w)->active; 4726 int active = ev_active (w);
4727
2241 prepares [active - 1] = prepares [--preparecnt]; 4728 prepares [active - 1] = prepares [--preparecnt];
2242 ((W)prepares [active - 1])->active = active; 4729 ev_active (prepares [active - 1]) = active;
2243 } 4730 }
2244 4731
2245 ev_stop (EV_A_ (W)w); 4732 ev_stop (EV_A_ (W)w);
2246}
2247 4733
4734 EV_FREQUENT_CHECK;
4735}
4736#endif
4737
4738#if EV_CHECK_ENABLE
2248void 4739void
2249ev_check_start (EV_P_ ev_check *w) 4740ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
2250{ 4741{
2251 if (expect_false (ev_is_active (w))) 4742 if (expect_false (ev_is_active (w)))
2252 return; 4743 return;
2253 4744
4745 EV_FREQUENT_CHECK;
4746
2254 ev_start (EV_A_ (W)w, ++checkcnt); 4747 ev_start (EV_A_ (W)w, ++checkcnt);
2255 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4748 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
2256 checks [checkcnt - 1] = w; 4749 checks [checkcnt - 1] = w;
2257}
2258 4750
4751 EV_FREQUENT_CHECK;
4752}
4753
2259void 4754void
2260ev_check_stop (EV_P_ ev_check *w) 4755ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
2261{ 4756{
2262 clear_pending (EV_A_ (W)w); 4757 clear_pending (EV_A_ (W)w);
2263 if (expect_false (!ev_is_active (w))) 4758 if (expect_false (!ev_is_active (w)))
2264 return; 4759 return;
2265 4760
4761 EV_FREQUENT_CHECK;
4762
2266 { 4763 {
2267 int active = ((W)w)->active; 4764 int active = ev_active (w);
4765
2268 checks [active - 1] = checks [--checkcnt]; 4766 checks [active - 1] = checks [--checkcnt];
2269 ((W)checks [active - 1])->active = active; 4767 ev_active (checks [active - 1]) = active;
2270 } 4768 }
2271 4769
2272 ev_stop (EV_A_ (W)w); 4770 ev_stop (EV_A_ (W)w);
4771
4772 EV_FREQUENT_CHECK;
2273} 4773}
4774#endif
2274 4775
2275#if EV_EMBED_ENABLE 4776#if EV_EMBED_ENABLE
2276void noinline 4777noinline
4778void
2277ev_embed_sweep (EV_P_ ev_embed *w) 4779ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
2278{ 4780{
2279 ev_loop (w->other, EVLOOP_NONBLOCK); 4781 ev_run (w->other, EVRUN_NOWAIT);
2280} 4782}
2281 4783
2282static void 4784static void
2283embed_io_cb (EV_P_ ev_io *io, int revents) 4785embed_io_cb (EV_P_ ev_io *io, int revents)
2284{ 4786{
2285 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io)); 4787 ev_embed *w = (ev_embed *)(((char *)io) - offsetof (ev_embed, io));
2286 4788
2287 if (ev_cb (w)) 4789 if (ev_cb (w))
2288 ev_feed_event (EV_A_ (W)w, EV_EMBED); 4790 ev_feed_event (EV_A_ (W)w, EV_EMBED);
2289 else 4791 else
2290 ev_loop (w->other, EVLOOP_NONBLOCK); 4792 ev_run (w->other, EVRUN_NOWAIT);
2291} 4793}
2292 4794
2293static void 4795static void
2294embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents) 4796embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
2295{ 4797{
2296 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare)); 4798 ev_embed *w = (ev_embed *)(((char *)prepare) - offsetof (ev_embed, prepare));
2297 4799
2298 { 4800 {
2299 struct ev_loop *loop = w->other; 4801 EV_P = w->other;
2300 4802
2301 while (fdchangecnt) 4803 while (fdchangecnt)
2302 { 4804 {
2303 fd_reify (EV_A); 4805 fd_reify (EV_A);
2304 ev_loop (EV_A_ EVLOOP_NONBLOCK); 4806 ev_run (EV_A_ EVRUN_NOWAIT);
2305 } 4807 }
2306 } 4808 }
4809}
4810
4811static void
4812embed_fork_cb (EV_P_ ev_fork *fork_w, int revents)
4813{
4814 ev_embed *w = (ev_embed *)(((char *)fork_w) - offsetof (ev_embed, fork));
4815
4816 ev_embed_stop (EV_A_ w);
4817
4818 {
4819 EV_P = w->other;
4820
4821 ev_loop_fork (EV_A);
4822 ev_run (EV_A_ EVRUN_NOWAIT);
4823 }
4824
4825 ev_embed_start (EV_A_ w);
2307} 4826}
2308 4827
2309#if 0 4828#if 0
2310static void 4829static void
2311embed_idle_cb (EV_P_ ev_idle *idle, int revents) 4830embed_idle_cb (EV_P_ ev_idle *idle, int revents)
… …
2313 ev_idle_stop (EV_A_ idle); 4832 ev_idle_stop (EV_A_ idle);
2314} 4833}
2315#endif 4834#endif
2316 4835
2317void 4836void
2318ev_embed_start (EV_P_ ev_embed *w) 4837ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
2319{ 4838{
2320 if (expect_false (ev_is_active (w))) 4839 if (expect_false (ev_is_active (w)))
2321 return; 4840 return;
2322 4841
2323 { 4842 {
2324 struct ev_loop *loop = w->other; 4843 EV_P = w->other;
2325 assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ())); 4844 assert (("libev: loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2326 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ); 4845 ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2327 } 4846 }
4847
4848 EV_FREQUENT_CHECK;
2328 4849
2329 ev_set_priority (&w->io, ev_priority (w)); 4850 ev_set_priority (&w->io, ev_priority (w));
2330 ev_io_start (EV_A_ &w->io); 4851 ev_io_start (EV_A_ &w->io);
2331 4852
2332 ev_prepare_init (&w->prepare, embed_prepare_cb); 4853 ev_prepare_init (&w->prepare, embed_prepare_cb);
2333 ev_set_priority (&w->prepare, EV_MINPRI); 4854 ev_set_priority (&w->prepare, EV_MINPRI);
2334 ev_prepare_start (EV_A_ &w->prepare); 4855 ev_prepare_start (EV_A_ &w->prepare);
2335 4856
4857 ev_fork_init (&w->fork, embed_fork_cb);
4858 ev_fork_start (EV_A_ &w->fork);
4859
2336 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/ 4860 /*ev_idle_init (&w->idle, e,bed_idle_cb);*/
2337 4861
2338 ev_start (EV_A_ (W)w, 1); 4862 ev_start (EV_A_ (W)w, 1);
2339}
2340 4863
4864 EV_FREQUENT_CHECK;
4865}
4866
2341void 4867void
2342ev_embed_stop (EV_P_ ev_embed *w) 4868ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
2343{ 4869{
2344 clear_pending (EV_A_ (W)w); 4870 clear_pending (EV_A_ (W)w);
2345 if (expect_false (!ev_is_active (w))) 4871 if (expect_false (!ev_is_active (w)))
2346 return; 4872 return;
2347 4873
4874 EV_FREQUENT_CHECK;
4875
2348 ev_io_stop (EV_A_ &w->io); 4876 ev_io_stop (EV_A_ &w->io);
2349 ev_prepare_stop (EV_A_ &w->prepare); 4877 ev_prepare_stop (EV_A_ &w->prepare);
4878 ev_fork_stop (EV_A_ &w->fork);
2350 4879
2351 ev_stop (EV_A_ (W)w); 4880 ev_stop (EV_A_ (W)w);
4881
4882 EV_FREQUENT_CHECK;
2352} 4883}
2353#endif 4884#endif
2354 4885
2355#if EV_FORK_ENABLE 4886#if EV_FORK_ENABLE
2356void 4887void
2357ev_fork_start (EV_P_ ev_fork *w) 4888ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
2358{ 4889{
2359 if (expect_false (ev_is_active (w))) 4890 if (expect_false (ev_is_active (w)))
2360 return; 4891 return;
2361 4892
4893 EV_FREQUENT_CHECK;
4894
2362 ev_start (EV_A_ (W)w, ++forkcnt); 4895 ev_start (EV_A_ (W)w, ++forkcnt);
2363 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4896 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
2364 forks [forkcnt - 1] = w; 4897 forks [forkcnt - 1] = w;
2365}
2366 4898
4899 EV_FREQUENT_CHECK;
4900}
4901
2367void 4902void
2368ev_fork_stop (EV_P_ ev_fork *w) 4903ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
2369{ 4904{
2370 clear_pending (EV_A_ (W)w); 4905 clear_pending (EV_A_ (W)w);
2371 if (expect_false (!ev_is_active (w))) 4906 if (expect_false (!ev_is_active (w)))
2372 return; 4907 return;
2373 4908
4909 EV_FREQUENT_CHECK;
4910
2374 { 4911 {
2375 int active = ((W)w)->active; 4912 int active = ev_active (w);
4913
2376 forks [active - 1] = forks [--forkcnt]; 4914 forks [active - 1] = forks [--forkcnt];
2377 ((W)forks [active - 1])->active = active; 4915 ev_active (forks [active - 1]) = active;
2378 } 4916 }
2379 4917
2380 ev_stop (EV_A_ (W)w); 4918 ev_stop (EV_A_ (W)w);
4919
4920 EV_FREQUENT_CHECK;
4921}
4922#endif
4923
4924#if EV_CLEANUP_ENABLE
4925void
4926ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
4927{
4928 if (expect_false (ev_is_active (w)))
4929 return;
4930
4931 EV_FREQUENT_CHECK;
4932
4933 ev_start (EV_A_ (W)w, ++cleanupcnt);
4934 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
4935 cleanups [cleanupcnt - 1] = w;
4936
4937 /* cleanup watchers should never keep a refcount on the loop */
4938 ev_unref (EV_A);
4939 EV_FREQUENT_CHECK;
4940}
4941
4942void
4943ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
4944{
4945 clear_pending (EV_A_ (W)w);
4946 if (expect_false (!ev_is_active (w)))
4947 return;
4948
4949 EV_FREQUENT_CHECK;
4950 ev_ref (EV_A);
4951
4952 {
4953 int active = ev_active (w);
4954
4955 cleanups [active - 1] = cleanups [--cleanupcnt];
4956 ev_active (cleanups [active - 1]) = active;
4957 }
4958
4959 ev_stop (EV_A_ (W)w);
4960
4961 EV_FREQUENT_CHECK;
4962}
4963#endif
4964
4965#if EV_ASYNC_ENABLE
4966void
4967ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
4968{
4969 if (expect_false (ev_is_active (w)))
4970 return;
4971
4972 w->sent = 0;
4973
4974 evpipe_init (EV_A);
4975
4976 EV_FREQUENT_CHECK;
4977
4978 ev_start (EV_A_ (W)w, ++asynccnt);
4979 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
4980 asyncs [asynccnt - 1] = w;
4981
4982 EV_FREQUENT_CHECK;
4983}
4984
4985void
4986ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
4987{
4988 clear_pending (EV_A_ (W)w);
4989 if (expect_false (!ev_is_active (w)))
4990 return;
4991
4992 EV_FREQUENT_CHECK;
4993
4994 {
4995 int active = ev_active (w);
4996
4997 asyncs [active - 1] = asyncs [--asynccnt];
4998 ev_active (asyncs [active - 1]) = active;
4999 }
5000
5001 ev_stop (EV_A_ (W)w);
5002
5003 EV_FREQUENT_CHECK;
5004}
5005
5006void
5007ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
5008{
5009 w->sent = 1;
5010 evpipe_write (EV_A_ &async_pending);
2381} 5011}
2382#endif 5012#endif
2383 5013
2384/*****************************************************************************/ 5014/*****************************************************************************/
2385 5015
… …
2395once_cb (EV_P_ struct ev_once *once, int revents) 5025once_cb (EV_P_ struct ev_once *once, int revents)
2396{ 5026{
2397 void (*cb)(int revents, void *arg) = once->cb; 5027 void (*cb)(int revents, void *arg) = once->cb;
2398 void *arg = once->arg; 5028 void *arg = once->arg;
2399 5029
2400 ev_io_stop (EV_A_ &once->io); 5030 ev_io_stop (EV_A_ &once->io);
2401 ev_timer_stop (EV_A_ &once->to); 5031 ev_timer_stop (EV_A_ &once->to);
2402 ev_free (once); 5032 ev_free (once);
2403 5033
2404 cb (revents, arg); 5034 cb (revents, arg);
2405} 5035}
2406 5036
2407static void 5037static void
2408once_cb_io (EV_P_ ev_io *w, int revents) 5038once_cb_io (EV_P_ ev_io *w, int revents)
2409{ 5039{
2410 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents); 5040 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io));
5041
5042 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->to));
2411} 5043}
2412 5044
2413static void 5045static void
2414once_cb_to (EV_P_ ev_timer *w, int revents) 5046once_cb_to (EV_P_ ev_timer *w, int revents)
2415{ 5047{
2416 once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents); 5048 struct ev_once *once = (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to));
2417}
2418 5049
5050 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
5051}
5052
2419void 5053void
2420ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5054ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
2421{ 5055{
2422 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5056 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
2423
2424 if (expect_false (!once))
2425 {
2426 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
2427 return;
2428 }
2429 5057
2430 once->cb = cb; 5058 once->cb = cb;
2431 once->arg = arg; 5059 once->arg = arg;
2432 5060
2433 ev_init (&once->io, once_cb_io); 5061 ev_init (&once->io, once_cb_io);
… …
2443 ev_timer_set (&once->to, timeout, 0.); 5071 ev_timer_set (&once->to, timeout, 0.);
2444 ev_timer_start (EV_A_ &once->to); 5072 ev_timer_start (EV_A_ &once->to);
2445 } 5073 }
2446} 5074}
2447 5075
5076/*****************************************************************************/
5077
5078#if EV_WALK_ENABLE
5079ecb_cold
5080void
5081ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
5082{
5083 int i, j;
5084 ev_watcher_list *wl, *wn;
5085
5086 if (types & (EV_IO | EV_EMBED))
5087 for (i = 0; i < anfdmax; ++i)
5088 for (wl = anfds [i].head; wl; )
5089 {
5090 wn = wl->next;
5091
5092#if EV_EMBED_ENABLE
5093 if (ev_cb ((ev_io *)wl) == embed_io_cb)
5094 {
5095 if (types & EV_EMBED)
5096 cb (EV_A_ EV_EMBED, ((char *)wl) - offsetof (struct ev_embed, io));
5097 }
5098 else
5099#endif
5100#if EV_USE_INOTIFY
5101 if (ev_cb ((ev_io *)wl) == infy_cb)
5102 ;
5103 else
5104#endif
5105 if ((ev_io *)wl != &pipe_w)
5106 if (types & EV_IO)
5107 cb (EV_A_ EV_IO, wl);
5108
5109 wl = wn;
5110 }
5111
5112 if (types & (EV_TIMER | EV_STAT))
5113 for (i = timercnt + HEAP0; i-- > HEAP0; )
5114#if EV_STAT_ENABLE
5115 /*TODO: timer is not always active*/
5116 if (ev_cb ((ev_timer *)ANHE_w (timers [i])) == stat_timer_cb)
5117 {
5118 if (types & EV_STAT)
5119 cb (EV_A_ EV_STAT, ((char *)ANHE_w (timers [i])) - offsetof (struct ev_stat, timer));
5120 }
5121 else
5122#endif
5123 if (types & EV_TIMER)
5124 cb (EV_A_ EV_TIMER, ANHE_w (timers [i]));
5125
5126#if EV_PERIODIC_ENABLE
5127 if (types & EV_PERIODIC)
5128 for (i = periodiccnt + HEAP0; i-- > HEAP0; )
5129 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
5130#endif
5131
5132#if EV_IDLE_ENABLE
5133 if (types & EV_IDLE)
5134 for (j = NUMPRI; j--; )
5135 for (i = idlecnt [j]; i--; )
5136 cb (EV_A_ EV_IDLE, idles [j][i]);
5137#endif
5138
5139#if EV_FORK_ENABLE
5140 if (types & EV_FORK)
5141 for (i = forkcnt; i--; )
5142 if (ev_cb (forks [i]) != embed_fork_cb)
5143 cb (EV_A_ EV_FORK, forks [i]);
5144#endif
5145
5146#if EV_ASYNC_ENABLE
5147 if (types & EV_ASYNC)
5148 for (i = asynccnt; i--; )
5149 cb (EV_A_ EV_ASYNC, asyncs [i]);
5150#endif
5151
5152#if EV_PREPARE_ENABLE
5153 if (types & EV_PREPARE)
5154 for (i = preparecnt; i--; )
5155# if EV_EMBED_ENABLE
5156 if (ev_cb (prepares [i]) != embed_prepare_cb)
5157# endif
5158 cb (EV_A_ EV_PREPARE, prepares [i]);
5159#endif
5160
5161#if EV_CHECK_ENABLE
5162 if (types & EV_CHECK)
5163 for (i = checkcnt; i--; )
5164 cb (EV_A_ EV_CHECK, checks [i]);
5165#endif
5166
5167#if EV_SIGNAL_ENABLE
5168 if (types & EV_SIGNAL)
5169 for (i = 0; i < EV_NSIG - 1; ++i)
5170 for (wl = signals [i].head; wl; )
5171 {
5172 wn = wl->next;
5173 cb (EV_A_ EV_SIGNAL, wl);
5174 wl = wn;
5175 }
5176#endif
5177
5178#if EV_CHILD_ENABLE
5179 if (types & EV_CHILD)
5180 for (i = (EV_PID_HASHSIZE); i--; )
5181 for (wl = childs [i]; wl; )
5182 {
5183 wn = wl->next;
5184 cb (EV_A_ EV_CHILD, wl);
5185 wl = wn;
5186 }
5187#endif
5188/* EV_STAT 0x00001000 /* stat data changed */
5189/* EV_EMBED 0x00010000 /* embedded event loop needs sweep */
5190}
5191#endif
5192
2448#if EV_MULTIPLICITY 5193#if EV_MULTIPLICITY
2449 #include "ev_wrap.h" 5194 #include "ev_wrap.h"
2450#endif 5195#endif
2451 5196
2452#ifdef __cplusplus
2453}
2454#endif
2455

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