ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/libev/ev.c
(Generate patch)

Comparing libev/ev.c (file contents):
Revision 1.354 by root, Fri Oct 22 09:24:11 2010 UTC vs.
Revision 1.495 by root, Mon Jun 24 21:27:57 2019 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010 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,
… …
43# include EV_CONFIG_H 43# include EV_CONFIG_H
44# else 44# else
45# include "config.h" 45# include "config.h"
46# endif 46# endif
47 47
48# if HAVE_FLOOR
49# ifndef EV_USE_FLOOR
50# define EV_USE_FLOOR 1
51# endif
52# endif
53
48# if HAVE_CLOCK_SYSCALL 54# if HAVE_CLOCK_SYSCALL
49# ifndef EV_USE_CLOCK_SYSCALL 55# ifndef EV_USE_CLOCK_SYSCALL
50# define EV_USE_CLOCK_SYSCALL 1 56# define EV_USE_CLOCK_SYSCALL 1
51# ifndef EV_USE_REALTIME 57# ifndef EV_USE_REALTIME
52# define EV_USE_REALTIME 0 58# define EV_USE_REALTIME 0
53# endif 59# endif
54# ifndef EV_USE_MONOTONIC 60# ifndef EV_USE_MONOTONIC
55# define EV_USE_MONOTONIC 1 61# define EV_USE_MONOTONIC 1
56# endif 62# endif
57# endif 63# endif
58# elif !defined(EV_USE_CLOCK_SYSCALL) 64# elif !defined EV_USE_CLOCK_SYSCALL
59# define EV_USE_CLOCK_SYSCALL 0 65# define EV_USE_CLOCK_SYSCALL 0
60# endif 66# endif
61 67
62# if HAVE_CLOCK_GETTIME 68# if HAVE_CLOCK_GETTIME
63# ifndef EV_USE_MONOTONIC 69# ifndef EV_USE_MONOTONIC
… …
107# define EV_USE_EPOLL EV_FEATURE_BACKENDS 113# define EV_USE_EPOLL EV_FEATURE_BACKENDS
108# endif 114# endif
109# else 115# else
110# undef EV_USE_EPOLL 116# undef EV_USE_EPOLL
111# define EV_USE_EPOLL 0 117# define EV_USE_EPOLL 0
118# endif
119
120# if HAVE_LINUX_AIO_ABI_H
121# ifndef EV_USE_LINUXAIO
122# define EV_USE_LINUXAIO EV_FEATURE_BACKENDS
123# endif
124# else
125# undef EV_USE_LINUXAIO
126# define EV_USE_LINUXAIO 0
112# endif 127# endif
113 128
114# if HAVE_KQUEUE && HAVE_SYS_EVENT_H 129# if HAVE_KQUEUE && HAVE_SYS_EVENT_H
115# ifndef EV_USE_KQUEUE 130# ifndef EV_USE_KQUEUE
116# define EV_USE_KQUEUE EV_FEATURE_BACKENDS 131# define EV_USE_KQUEUE EV_FEATURE_BACKENDS
… …
156# define EV_USE_EVENTFD 0 171# define EV_USE_EVENTFD 0
157# endif 172# endif
158 173
159#endif 174#endif
160 175
161#include <math.h> 176/* OS X, in its infinite idiocy, actually HARDCODES
177 * a limit of 1024 into their select. Where people have brains,
178 * OS X engineers apparently have a vacuum. Or maybe they were
179 * ordered to have a vacuum, or they do anything for money.
180 * This might help. Or not.
181 * Note that this must be defined early, as other include files
182 * will rely on this define as well.
183 */
184#define _DARWIN_UNLIMITED_SELECT 1
185
162#include <stdlib.h> 186#include <stdlib.h>
163#include <string.h> 187#include <string.h>
164#include <fcntl.h> 188#include <fcntl.h>
165#include <stddef.h> 189#include <stddef.h>
166 190
… …
178# include EV_H 202# include EV_H
179#else 203#else
180# include "ev.h" 204# include "ev.h"
181#endif 205#endif
182 206
183EV_CPP(extern "C" {) 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
216#endif
184 217
185#ifndef _WIN32 218#ifndef _WIN32
186# include <sys/time.h> 219# include <sys/time.h>
187# include <sys/wait.h> 220# include <sys/wait.h>
188# include <unistd.h> 221# include <unistd.h>
189#else 222#else
190# include <io.h> 223# include <io.h>
191# define WIN32_LEAN_AND_MEAN 224# define WIN32_LEAN_AND_MEAN
225# include <winsock2.h>
192# include <windows.h> 226# include <windows.h>
193# ifndef EV_SELECT_IS_WINSOCKET 227# ifndef EV_SELECT_IS_WINSOCKET
194# define EV_SELECT_IS_WINSOCKET 1 228# define EV_SELECT_IS_WINSOCKET 1
195# endif 229# endif
196# undef EV_AVOID_STDIO 230# undef EV_AVOID_STDIO
197#endif 231#endif
198 232
199/* OS X, in its infinite idiocy, actually HARDCODES
200 * a limit of 1024 into their select. Where people have brains,
201 * OS X engineers apparently have a vacuum. Or maybe they were
202 * ordered to have a vacuum, or they do anything for money.
203 * This might help. Or not.
204 */
205#define _DARWIN_UNLIMITED_SELECT 1
206
207/* this block tries to deduce configuration from header-defined symbols and defaults */ 233/* this block tries to deduce configuration from header-defined symbols and defaults */
208 234
209/* try to deduce the maximum number of signals on this platform */ 235/* try to deduce the maximum number of signals on this platform */
210#if defined (EV_NSIG) 236#if defined EV_NSIG
211/* use what's provided */ 237/* use what's provided */
212#elif defined (NSIG) 238#elif defined NSIG
213# define EV_NSIG (NSIG) 239# define EV_NSIG (NSIG)
214#elif defined(_NSIG) 240#elif defined _NSIG
215# define EV_NSIG (_NSIG) 241# define EV_NSIG (_NSIG)
216#elif defined (SIGMAX) 242#elif defined SIGMAX
217# define EV_NSIG (SIGMAX+1) 243# define EV_NSIG (SIGMAX+1)
218#elif defined (SIG_MAX) 244#elif defined SIG_MAX
219# define EV_NSIG (SIG_MAX+1) 245# define EV_NSIG (SIG_MAX+1)
220#elif defined (_SIG_MAX) 246#elif defined _SIG_MAX
221# define EV_NSIG (_SIG_MAX+1) 247# define EV_NSIG (_SIG_MAX+1)
222#elif defined (MAXSIG) 248#elif defined MAXSIG
223# define EV_NSIG (MAXSIG+1) 249# define EV_NSIG (MAXSIG+1)
224#elif defined (MAX_SIG) 250#elif defined MAX_SIG
225# define EV_NSIG (MAX_SIG+1) 251# define EV_NSIG (MAX_SIG+1)
226#elif defined (SIGARRAYSIZE) 252#elif defined SIGARRAYSIZE
227# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */ 253# define EV_NSIG (SIGARRAYSIZE) /* Assume ary[SIGARRAYSIZE] */
228#elif defined (_sys_nsig) 254#elif defined _sys_nsig
229# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */ 255# define EV_NSIG (_sys_nsig) /* Solaris 2.5 */
230#else 256#else
231# error "unable to find value for NSIG, please report" 257# define EV_NSIG (8 * sizeof (sigset_t) + 1)
232/* to make it compile regardless, just remove the above line, */ 258#endif
233/* but consider reporting it, too! :) */ 259
234# define EV_NSIG 65 260#ifndef EV_USE_FLOOR
261# define EV_USE_FLOOR 0
235#endif 262#endif
236 263
237#ifndef EV_USE_CLOCK_SYSCALL 264#ifndef EV_USE_CLOCK_SYSCALL
238# if __linux && __GLIBC__ >= 2 265# if __linux && __GLIBC__ == 2 && __GLIBC_MINOR__ < 17
239# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS 266# define EV_USE_CLOCK_SYSCALL EV_FEATURE_OS
240# else 267# else
241# define EV_USE_CLOCK_SYSCALL 0 268# define EV_USE_CLOCK_SYSCALL 0
242# endif 269# endif
243#endif 270#endif
244 271
272#if !(_POSIX_TIMERS > 0)
273# ifndef EV_USE_MONOTONIC
274# define EV_USE_MONOTONIC 0
275# endif
276# ifndef EV_USE_REALTIME
277# define EV_USE_REALTIME 0
278# endif
279#endif
280
245#ifndef EV_USE_MONOTONIC 281#ifndef EV_USE_MONOTONIC
246# if defined (_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 282# if defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
247# define EV_USE_MONOTONIC EV_FEATURE_OS 283# define EV_USE_MONOTONIC EV_FEATURE_OS
248# else 284# else
249# define EV_USE_MONOTONIC 0 285# define EV_USE_MONOTONIC 0
250# endif 286# endif
251#endif 287#endif
… …
288 324
289#ifndef EV_USE_PORT 325#ifndef EV_USE_PORT
290# define EV_USE_PORT 0 326# define EV_USE_PORT 0
291#endif 327#endif
292 328
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
293#ifndef EV_USE_INOTIFY 337#ifndef EV_USE_INOTIFY
294# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4)) 338# if __linux && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
295# define EV_USE_INOTIFY EV_FEATURE_OS 339# define EV_USE_INOTIFY EV_FEATURE_OS
296# else 340# else
297# define EV_USE_INOTIFY 0 341# define EV_USE_INOTIFY 0
… …
338 382
339#ifndef EV_HEAP_CACHE_AT 383#ifndef EV_HEAP_CACHE_AT
340# define EV_HEAP_CACHE_AT EV_FEATURE_DATA 384# define EV_HEAP_CACHE_AT EV_FEATURE_DATA
341#endif 385#endif
342 386
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
343/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */ 403/* on linux, we can use a (slow) syscall to avoid a dependency on pthread, */
344/* which makes programs even slower. might work on other unices, too. */ 404/* which makes programs even slower. might work on other unices, too. */
345#if EV_USE_CLOCK_SYSCALL 405#if EV_USE_CLOCK_SYSCALL
346# include <syscall.h> 406# include <sys/syscall.h>
347# ifdef SYS_clock_gettime 407# ifdef SYS_clock_gettime
348# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts)) 408# define clock_gettime(id, ts) syscall (SYS_clock_gettime, (id), (ts))
349# undef EV_USE_MONOTONIC 409# undef EV_USE_MONOTONIC
350# define EV_USE_MONOTONIC 1 410# define EV_USE_MONOTONIC 1
351# else 411# else
… …
354# endif 414# endif
355#endif 415#endif
356 416
357/* this block fixes any misconfiguration where we know we run into trouble otherwise */ 417/* this block fixes any misconfiguration where we know we run into trouble otherwise */
358 418
359#ifdef _AIX
360/* AIX has a completely broken poll.h header */
361# undef EV_USE_POLL
362# define EV_USE_POLL 0
363#endif
364
365#ifndef CLOCK_MONOTONIC 419#ifndef CLOCK_MONOTONIC
366# undef EV_USE_MONOTONIC 420# undef EV_USE_MONOTONIC
367# define EV_USE_MONOTONIC 0 421# define EV_USE_MONOTONIC 0
368#endif 422#endif
369 423
… …
376# undef EV_USE_INOTIFY 430# undef EV_USE_INOTIFY
377# define EV_USE_INOTIFY 0 431# define EV_USE_INOTIFY 0
378#endif 432#endif
379 433
380#if !EV_USE_NANOSLEEP 434#if !EV_USE_NANOSLEEP
381# ifndef _WIN32 435/* hp-ux has it in sys/time.h, which we unconditionally include above */
436# if !defined _WIN32 && !defined __hpux
382# include <sys/select.h> 437# include <sys/select.h>
383# endif 438# endif
384#endif 439#endif
385 440
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
386#if EV_USE_INOTIFY 449#if EV_USE_INOTIFY
387# include <sys/utsname.h>
388# include <sys/statfs.h> 450# include <sys/statfs.h>
389# include <sys/inotify.h> 451# include <sys/inotify.h>
390/* some very old inotify.h headers don't have IN_DONT_FOLLOW */ 452/* some very old inotify.h headers don't have IN_DONT_FOLLOW */
391# ifndef IN_DONT_FOLLOW 453# ifndef IN_DONT_FOLLOW
392# undef EV_USE_INOTIFY 454# undef EV_USE_INOTIFY
393# define EV_USE_INOTIFY 0 455# define EV_USE_INOTIFY 0
394# endif 456# endif
395#endif
396
397#if EV_SELECT_IS_WINSOCKET
398# include <winsock.h>
399#endif 457#endif
400 458
401#if EV_USE_EVENTFD 459#if EV_USE_EVENTFD
402/* our minimum requirement is glibc 2.7 which has the stub, but not the header */ 460/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
403# include <stdint.h> 461# include <stdint.h>
… …
443#else 501#else
444# define EV_FREQUENT_CHECK do { } while (0) 502# define EV_FREQUENT_CHECK do { } while (0)
445#endif 503#endif
446 504
447/* 505/*
448 * This is used to avoid floating point rounding problems. 506 * This is used to work around floating point rounding problems.
449 * It is added to ev_rt_now when scheduling periodics
450 * to ensure progress, time-wise, even when rounding
451 * errors are against us.
452 * This value is good at least till the year 4000. 507 * This value is good at least till the year 4000.
453 * Better solutions welcome.
454 */ 508 */
455#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 */
456 511
457#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) */
458#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) */
459 514
460#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0) 515#define EV_TV_SET(tv,t) do { tv.tv_sec = (long)t; tv.tv_usec = (long)((t - tv.tv_sec) * 1e6); } while (0)
461#define EV_TS_SET(ts,t) do { ts.tv_sec = (long)t; ts.tv_nsec = (long)((t - ts.tv_sec) * 1e9); } 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)
462 517
518/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
519/* ECB.H BEGIN */
520/*
521 * libecb - http://software.schmorp.de/pkg/libecb
522 *
523 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
524 * Copyright (©) 2011 Emanuele Giaquinta
525 * All rights reserved.
526 *
527 * Redistribution and use in source and binary forms, with or without modifica-
528 * tion, are permitted provided that the following conditions are met:
529 *
530 * 1. Redistributions of source code must retain the above copyright notice,
531 * this list of conditions and the following disclaimer.
532 *
533 * 2. Redistributions in binary form must reproduce the above copyright
534 * notice, this list of conditions and the following disclaimer in the
535 * documentation and/or other materials provided with the distribution.
536 *
537 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
538 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
539 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
540 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
541 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
542 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
543 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
544 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
545 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
546 * OF THE POSSIBILITY OF SUCH DAMAGE.
547 *
548 * Alternatively, the contents of this file may be used under the terms of
549 * the GNU General Public License ("GPL") version 2 or any later version,
550 * in which case the provisions of the GPL are applicable instead of
551 * the above. If you wish to allow the use of your version of this file
552 * only under the terms of the GPL and not to allow others to use your
553 * version of this file under the BSD license, indicate your decision
554 * by deleting the provisions above and replace them with the notice
555 * and other provisions required by the GPL. If you do not delete the
556 * provisions above, a recipient may use your version of this file under
557 * either the BSD or the GPL.
558 */
559
560#ifndef ECB_H
561#define ECB_H
562
563/* 16 bits major, 16 bits minor */
564#define ECB_VERSION 0x00010005
565
566#ifdef _WIN32
567 typedef signed char int8_t;
568 typedef unsigned char uint8_t;
569 typedef signed short int16_t;
570 typedef unsigned short uint16_t;
571 typedef signed int int32_t;
572 typedef unsigned int uint32_t;
463#if __GNUC__ >= 4 573 #if __GNUC__
574 typedef signed long long int64_t;
575 typedef unsigned long long uint64_t;
576 #else /* _MSC_VER || __BORLANDC__ */
577 typedef signed __int64 int64_t;
578 typedef unsigned __int64 uint64_t;
579 #endif
580 #ifdef _WIN64
581 #define ECB_PTRSIZE 8
582 typedef uint64_t uintptr_t;
583 typedef int64_t intptr_t;
584 #else
585 #define ECB_PTRSIZE 4
586 typedef uint32_t uintptr_t;
587 typedef int32_t intptr_t;
588 #endif
589#else
590 #include <inttypes.h>
591 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
592 #define ECB_PTRSIZE 8
593 #else
594 #define ECB_PTRSIZE 4
595 #endif
596#endif
597
598#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
599#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
600
601/* work around x32 idiocy by defining proper macros */
602#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
603 #if _ILP32
604 #define ECB_AMD64_X32 1
605 #else
606 #define ECB_AMD64 1
607 #endif
608#endif
609
610/* many compilers define _GNUC_ to some versions but then only implement
611 * what their idiot authors think are the "more important" extensions,
612 * causing enormous grief in return for some better fake benchmark numbers.
613 * or so.
614 * we try to detect these and simply assume they are not gcc - if they have
615 * an issue with that they should have done it right in the first place.
616 */
617#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
618 #define ECB_GCC_VERSION(major,minor) 0
619#else
620 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
621#endif
622
623#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
624
625#if __clang__ && defined __has_builtin
626 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
627#else
628 #define ECB_CLANG_BUILTIN(x) 0
629#endif
630
631#if __clang__ && defined __has_extension
632 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
633#else
634 #define ECB_CLANG_EXTENSION(x) 0
635#endif
636
637#define ECB_CPP (__cplusplus+0)
638#define ECB_CPP11 (__cplusplus >= 201103L)
639#define ECB_CPP14 (__cplusplus >= 201402L)
640#define ECB_CPP17 (__cplusplus >= 201703L)
641
642#if ECB_CPP
643 #define ECB_C 0
644 #define ECB_STDC_VERSION 0
645#else
646 #define ECB_C 1
647 #define ECB_STDC_VERSION __STDC_VERSION__
648#endif
649
650#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
651#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
652#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
653
654#if ECB_CPP
655 #define ECB_EXTERN_C extern "C"
656 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
657 #define ECB_EXTERN_C_END }
658#else
659 #define ECB_EXTERN_C extern
660 #define ECB_EXTERN_C_BEG
661 #define ECB_EXTERN_C_END
662#endif
663
664/*****************************************************************************/
665
666/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
667/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
668
669#if ECB_NO_THREADS
670 #define ECB_NO_SMP 1
671#endif
672
673#if ECB_NO_SMP
674 #define ECB_MEMORY_FENCE do { } while (0)
675#endif
676
677/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
678#if __xlC__ && ECB_CPP
679 #include <builtins.h>
680#endif
681
682#if 1400 <= _MSC_VER
683 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
684#endif
685
686#ifndef ECB_MEMORY_FENCE
687 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
688 #if __i386 || __i386__
689 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
690 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
691 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
692 #elif ECB_GCC_AMD64
693 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
694 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
695 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
696 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
697 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
698 #elif defined __ARM_ARCH_2__ \
699 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
700 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
701 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
702 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
703 || defined __ARM_ARCH_5TEJ__
704 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
705 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
706 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
707 || defined __ARM_ARCH_6T2__
708 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
709 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
710 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
711 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
712 #elif __aarch64__
713 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
714 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
715 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
716 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
717 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
718 #elif defined __s390__ || defined __s390x__
719 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
720 #elif defined __mips__
721 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
722 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
723 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
724 #elif defined __alpha__
725 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
726 #elif defined __hppa__
727 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
728 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
729 #elif defined __ia64__
730 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
731 #elif defined __m68k__
732 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
733 #elif defined __m88k__
734 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
735 #elif defined __sh__
736 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
737 #endif
738 #endif
739#endif
740
741#ifndef ECB_MEMORY_FENCE
742 #if ECB_GCC_VERSION(4,7)
743 /* see comment below (stdatomic.h) about the C11 memory model. */
744 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
745 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
746 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
747
748 #elif ECB_CLANG_EXTENSION(c_atomic)
749 /* see comment below (stdatomic.h) about the C11 memory model. */
750 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
751 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
752 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
753
754 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
755 #define ECB_MEMORY_FENCE __sync_synchronize ()
756 #elif _MSC_VER >= 1500 /* VC++ 2008 */
757 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
758 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
759 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
760 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
761 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
762 #elif _MSC_VER >= 1400 /* VC++ 2005 */
763 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
764 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
765 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
766 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
767 #elif defined _WIN32
768 #include <WinNT.h>
769 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
770 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
771 #include <mbarrier.h>
772 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
773 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
774 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
775 #elif __xlC__
776 #define ECB_MEMORY_FENCE __sync ()
777 #endif
778#endif
779
780#ifndef ECB_MEMORY_FENCE
781 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
782 /* we assume that these memory fences work on all variables/all memory accesses, */
783 /* not just C11 atomics and atomic accesses */
784 #include <stdatomic.h>
785 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
786 /* any fence other than seq_cst, which isn't very efficient for us. */
787 /* Why that is, we don't know - either the C11 memory model is quite useless */
788 /* for most usages, or gcc and clang have a bug */
789 /* I *currently* lean towards the latter, and inefficiently implement */
790 /* all three of ecb's fences as a seq_cst fence */
791 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
792 /* for all __atomic_thread_fence's except seq_cst */
793 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
794 #endif
795#endif
796
797#ifndef ECB_MEMORY_FENCE
798 #if !ECB_AVOID_PTHREADS
799 /*
800 * if you get undefined symbol references to pthread_mutex_lock,
801 * or failure to find pthread.h, then you should implement
802 * the ECB_MEMORY_FENCE operations for your cpu/compiler
803 * OR provide pthread.h and link against the posix thread library
804 * of your system.
805 */
806 #include <pthread.h>
807 #define ECB_NEEDS_PTHREADS 1
808 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
809
810 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
811 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
812 #endif
813#endif
814
815#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
816 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
817#endif
818
819#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
820 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
821#endif
822
823/*****************************************************************************/
824
825#if ECB_CPP
826 #define ecb_inline static inline
827#elif ECB_GCC_VERSION(2,5)
828 #define ecb_inline static __inline__
829#elif ECB_C99
830 #define ecb_inline static inline
831#else
832 #define ecb_inline static
833#endif
834
835#if ECB_GCC_VERSION(3,3)
836 #define ecb_restrict __restrict__
837#elif ECB_C99
838 #define ecb_restrict restrict
839#else
840 #define ecb_restrict
841#endif
842
843typedef int ecb_bool;
844
845#define ECB_CONCAT_(a, b) a ## b
846#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
847#define ECB_STRINGIFY_(a) # a
848#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
849#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
850
851#define ecb_function_ ecb_inline
852
853#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
854 #define ecb_attribute(attrlist) __attribute__ (attrlist)
855#else
856 #define ecb_attribute(attrlist)
857#endif
858
859#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
860 #define ecb_is_constant(expr) __builtin_constant_p (expr)
861#else
862 /* possible C11 impl for integral types
863 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
864 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
865
866 #define ecb_is_constant(expr) 0
867#endif
868
869#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
464# define expect(expr,value) __builtin_expect ((expr),(value)) 870 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
465# define noinline __attribute__ ((noinline))
466#else 871#else
467# define expect(expr,value) (expr) 872 #define ecb_expect(expr,value) (expr)
468# define noinline
469# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
470# define inline
471# endif 873#endif
472#endif
473 874
875#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
876 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
877#else
878 #define ecb_prefetch(addr,rw,locality)
879#endif
880
881/* no emulation for ecb_decltype */
882#if ECB_CPP11
883 // older implementations might have problems with decltype(x)::type, work around it
884 template<class T> struct ecb_decltype_t { typedef T type; };
885 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
886#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
887 #define ecb_decltype(x) __typeof__ (x)
888#endif
889
890#if _MSC_VER >= 1300
891 #define ecb_deprecated __declspec (deprecated)
892#else
893 #define ecb_deprecated ecb_attribute ((__deprecated__))
894#endif
895
896#if _MSC_VER >= 1500
897 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
898#elif ECB_GCC_VERSION(4,5)
899 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
900#else
901 #define ecb_deprecated_message(msg) ecb_deprecated
902#endif
903
904#if _MSC_VER >= 1400
905 #define ecb_noinline __declspec (noinline)
906#else
907 #define ecb_noinline ecb_attribute ((__noinline__))
908#endif
909
910#define ecb_unused ecb_attribute ((__unused__))
911#define ecb_const ecb_attribute ((__const__))
912#define ecb_pure ecb_attribute ((__pure__))
913
914#if ECB_C11 || __IBMC_NORETURN
915 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
916 #define ecb_noreturn _Noreturn
917#elif ECB_CPP11
918 #define ecb_noreturn [[noreturn]]
919#elif _MSC_VER >= 1200
920 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
921 #define ecb_noreturn __declspec (noreturn)
922#else
923 #define ecb_noreturn ecb_attribute ((__noreturn__))
924#endif
925
926#if ECB_GCC_VERSION(4,3)
927 #define ecb_artificial ecb_attribute ((__artificial__))
928 #define ecb_hot ecb_attribute ((__hot__))
929 #define ecb_cold ecb_attribute ((__cold__))
930#else
931 #define ecb_artificial
932 #define ecb_hot
933 #define ecb_cold
934#endif
935
936/* put around conditional expressions if you are very sure that the */
937/* expression is mostly true or mostly false. note that these return */
938/* booleans, not the expression. */
474#define expect_false(expr) expect ((expr) != 0, 0) 939#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475#define expect_true(expr) expect ((expr) != 0, 1) 940#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
941/* for compatibility to the rest of the world */
942#define ecb_likely(expr) ecb_expect_true (expr)
943#define ecb_unlikely(expr) ecb_expect_false (expr)
944
945/* count trailing zero bits and count # of one bits */
946#if ECB_GCC_VERSION(3,4) \
947 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
948 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
949 && ECB_CLANG_BUILTIN(__builtin_popcount))
950 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
951 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
952 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
953 #define ecb_ctz32(x) __builtin_ctz (x)
954 #define ecb_ctz64(x) __builtin_ctzll (x)
955 #define ecb_popcount32(x) __builtin_popcount (x)
956 /* no popcountll */
957#else
958 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
959 ecb_function_ ecb_const int
960 ecb_ctz32 (uint32_t x)
961 {
962#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
963 unsigned long r;
964 _BitScanForward (&r, x);
965 return (int)r;
966#else
967 int r = 0;
968
969 x &= ~x + 1; /* this isolates the lowest bit */
970
971#if ECB_branchless_on_i386
972 r += !!(x & 0xaaaaaaaa) << 0;
973 r += !!(x & 0xcccccccc) << 1;
974 r += !!(x & 0xf0f0f0f0) << 2;
975 r += !!(x & 0xff00ff00) << 3;
976 r += !!(x & 0xffff0000) << 4;
977#else
978 if (x & 0xaaaaaaaa) r += 1;
979 if (x & 0xcccccccc) r += 2;
980 if (x & 0xf0f0f0f0) r += 4;
981 if (x & 0xff00ff00) r += 8;
982 if (x & 0xffff0000) r += 16;
983#endif
984
985 return r;
986#endif
987 }
988
989 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
990 ecb_function_ ecb_const int
991 ecb_ctz64 (uint64_t x)
992 {
993#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
994 unsigned long r;
995 _BitScanForward64 (&r, x);
996 return (int)r;
997#else
998 int shift = x & 0xffffffff ? 0 : 32;
999 return ecb_ctz32 (x >> shift) + shift;
1000#endif
1001 }
1002
1003 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
1004 ecb_function_ ecb_const int
1005 ecb_popcount32 (uint32_t x)
1006 {
1007 x -= (x >> 1) & 0x55555555;
1008 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
1009 x = ((x >> 4) + x) & 0x0f0f0f0f;
1010 x *= 0x01010101;
1011
1012 return x >> 24;
1013 }
1014
1015 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
1016 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
1017 {
1018#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1019 unsigned long r;
1020 _BitScanReverse (&r, x);
1021 return (int)r;
1022#else
1023 int r = 0;
1024
1025 if (x >> 16) { x >>= 16; r += 16; }
1026 if (x >> 8) { x >>= 8; r += 8; }
1027 if (x >> 4) { x >>= 4; r += 4; }
1028 if (x >> 2) { x >>= 2; r += 2; }
1029 if (x >> 1) { r += 1; }
1030
1031 return r;
1032#endif
1033 }
1034
1035 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1036 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1037 {
1038#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1039 unsigned long r;
1040 _BitScanReverse64 (&r, x);
1041 return (int)r;
1042#else
1043 int r = 0;
1044
1045 if (x >> 32) { x >>= 32; r += 32; }
1046
1047 return r + ecb_ld32 (x);
1048#endif
1049 }
1050#endif
1051
1052ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1053ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1054ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1055ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1056
1057ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1058ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1059{
1060 return ( (x * 0x0802U & 0x22110U)
1061 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1062}
1063
1064ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1065ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1066{
1067 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1068 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1069 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1070 x = ( x >> 8 ) | ( x << 8);
1071
1072 return x;
1073}
1074
1075ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1076ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1077{
1078 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1079 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1080 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1081 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1082 x = ( x >> 16 ) | ( x << 16);
1083
1084 return x;
1085}
1086
1087/* popcount64 is only available on 64 bit cpus as gcc builtin */
1088/* so for this version we are lazy */
1089ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1090ecb_function_ ecb_const int
1091ecb_popcount64 (uint64_t x)
1092{
1093 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1094}
1095
1096ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1097ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1098ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1099ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1100ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1101ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1102ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1103ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1104
1105ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1106ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1107ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1108ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1109ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1110ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1111ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1112ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1113
1114#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1115 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1116 #define ecb_bswap16(x) __builtin_bswap16 (x)
1117 #else
1118 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1119 #endif
1120 #define ecb_bswap32(x) __builtin_bswap32 (x)
1121 #define ecb_bswap64(x) __builtin_bswap64 (x)
1122#elif _MSC_VER
1123 #include <stdlib.h>
1124 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1125 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1126 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1127#else
1128 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1129 ecb_function_ ecb_const uint16_t
1130 ecb_bswap16 (uint16_t x)
1131 {
1132 return ecb_rotl16 (x, 8);
1133 }
1134
1135 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1136 ecb_function_ ecb_const uint32_t
1137 ecb_bswap32 (uint32_t x)
1138 {
1139 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1140 }
1141
1142 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1143 ecb_function_ ecb_const uint64_t
1144 ecb_bswap64 (uint64_t x)
1145 {
1146 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1147 }
1148#endif
1149
1150#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1151 #define ecb_unreachable() __builtin_unreachable ()
1152#else
1153 /* this seems to work fine, but gcc always emits a warning for it :/ */
1154 ecb_inline ecb_noreturn void ecb_unreachable (void);
1155 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1156#endif
1157
1158/* try to tell the compiler that some condition is definitely true */
1159#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1160
1161ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1162ecb_inline ecb_const uint32_t
1163ecb_byteorder_helper (void)
1164{
1165 /* the union code still generates code under pressure in gcc, */
1166 /* but less than using pointers, and always seems to */
1167 /* successfully return a constant. */
1168 /* the reason why we have this horrible preprocessor mess */
1169 /* is to avoid it in all cases, at least on common architectures */
1170 /* or when using a recent enough gcc version (>= 4.6) */
1171#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1172 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1173 #define ECB_LITTLE_ENDIAN 1
1174 return 0x44332211;
1175#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1176 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1177 #define ECB_BIG_ENDIAN 1
1178 return 0x11223344;
1179#else
1180 union
1181 {
1182 uint8_t c[4];
1183 uint32_t u;
1184 } u = { 0x11, 0x22, 0x33, 0x44 };
1185 return u.u;
1186#endif
1187}
1188
1189ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1190ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1191ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1192ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1193
1194#if ECB_GCC_VERSION(3,0) || ECB_C99
1195 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1196#else
1197 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1198#endif
1199
1200#if ECB_CPP
1201 template<typename T>
1202 static inline T ecb_div_rd (T val, T div)
1203 {
1204 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1205 }
1206 template<typename T>
1207 static inline T ecb_div_ru (T val, T div)
1208 {
1209 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1210 }
1211#else
1212 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1213 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1214#endif
1215
1216#if ecb_cplusplus_does_not_suck
1217 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1218 template<typename T, int N>
1219 static inline int ecb_array_length (const T (&arr)[N])
1220 {
1221 return N;
1222 }
1223#else
1224 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1225#endif
1226
1227ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1228ecb_function_ ecb_const uint32_t
1229ecb_binary16_to_binary32 (uint32_t x)
1230{
1231 unsigned int s = (x & 0x8000) << (31 - 15);
1232 int e = (x >> 10) & 0x001f;
1233 unsigned int m = x & 0x03ff;
1234
1235 if (ecb_expect_false (e == 31))
1236 /* infinity or NaN */
1237 e = 255 - (127 - 15);
1238 else if (ecb_expect_false (!e))
1239 {
1240 if (ecb_expect_true (!m))
1241 /* zero, handled by code below by forcing e to 0 */
1242 e = 0 - (127 - 15);
1243 else
1244 {
1245 /* subnormal, renormalise */
1246 unsigned int s = 10 - ecb_ld32 (m);
1247
1248 m = (m << s) & 0x3ff; /* mask implicit bit */
1249 e -= s - 1;
1250 }
1251 }
1252
1253 /* e and m now are normalised, or zero, (or inf or nan) */
1254 e += 127 - 15;
1255
1256 return s | (e << 23) | (m << (23 - 10));
1257}
1258
1259ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1260ecb_function_ ecb_const uint16_t
1261ecb_binary32_to_binary16 (uint32_t x)
1262{
1263 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1264 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1265 unsigned int m = x & 0x007fffff;
1266
1267 x &= 0x7fffffff;
1268
1269 /* if it's within range of binary16 normals, use fast path */
1270 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1271 {
1272 /* mantissa round-to-even */
1273 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1274
1275 /* handle overflow */
1276 if (ecb_expect_false (m >= 0x00800000))
1277 {
1278 m >>= 1;
1279 e += 1;
1280 }
1281
1282 return s | (e << 10) | (m >> (23 - 10));
1283 }
1284
1285 /* handle large numbers and infinity */
1286 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1287 return s | 0x7c00;
1288
1289 /* handle zero, subnormals and small numbers */
1290 if (ecb_expect_true (x < 0x38800000))
1291 {
1292 /* zero */
1293 if (ecb_expect_true (!x))
1294 return s;
1295
1296 /* handle subnormals */
1297
1298 /* too small, will be zero */
1299 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1300 return s;
1301
1302 m |= 0x00800000; /* make implicit bit explicit */
1303
1304 /* very tricky - we need to round to the nearest e (+10) bit value */
1305 {
1306 unsigned int bits = 14 - e;
1307 unsigned int half = (1 << (bits - 1)) - 1;
1308 unsigned int even = (m >> bits) & 1;
1309
1310 /* if this overflows, we will end up with a normalised number */
1311 m = (m + half + even) >> bits;
1312 }
1313
1314 return s | m;
1315 }
1316
1317 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1318 m >>= 13;
1319
1320 return s | 0x7c00 | m | !m;
1321}
1322
1323/*******************************************************************************/
1324/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1325
1326/* basically, everything uses "ieee pure-endian" floating point numbers */
1327/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1328#if 0 \
1329 || __i386 || __i386__ \
1330 || ECB_GCC_AMD64 \
1331 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1332 || defined __s390__ || defined __s390x__ \
1333 || defined __mips__ \
1334 || defined __alpha__ \
1335 || defined __hppa__ \
1336 || defined __ia64__ \
1337 || defined __m68k__ \
1338 || defined __m88k__ \
1339 || defined __sh__ \
1340 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1341 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1342 || defined __aarch64__
1343 #define ECB_STDFP 1
1344 #include <string.h> /* for memcpy */
1345#else
1346 #define ECB_STDFP 0
1347#endif
1348
1349#ifndef ECB_NO_LIBM
1350
1351 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1352
1353 /* only the oldest of old doesn't have this one. solaris. */
1354 #ifdef INFINITY
1355 #define ECB_INFINITY INFINITY
1356 #else
1357 #define ECB_INFINITY HUGE_VAL
1358 #endif
1359
1360 #ifdef NAN
1361 #define ECB_NAN NAN
1362 #else
1363 #define ECB_NAN ECB_INFINITY
1364 #endif
1365
1366 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1367 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1368 #define ecb_frexpf(x,e) frexpf ((x), (e))
1369 #else
1370 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1371 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1372 #endif
1373
1374 /* convert a float to ieee single/binary32 */
1375 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1376 ecb_function_ ecb_const uint32_t
1377 ecb_float_to_binary32 (float x)
1378 {
1379 uint32_t r;
1380
1381 #if ECB_STDFP
1382 memcpy (&r, &x, 4);
1383 #else
1384 /* slow emulation, works for anything but -0 */
1385 uint32_t m;
1386 int e;
1387
1388 if (x == 0e0f ) return 0x00000000U;
1389 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1390 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1391 if (x != x ) return 0x7fbfffffU;
1392
1393 m = ecb_frexpf (x, &e) * 0x1000000U;
1394
1395 r = m & 0x80000000U;
1396
1397 if (r)
1398 m = -m;
1399
1400 if (e <= -126)
1401 {
1402 m &= 0xffffffU;
1403 m >>= (-125 - e);
1404 e = -126;
1405 }
1406
1407 r |= (e + 126) << 23;
1408 r |= m & 0x7fffffU;
1409 #endif
1410
1411 return r;
1412 }
1413
1414 /* converts an ieee single/binary32 to a float */
1415 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1416 ecb_function_ ecb_const float
1417 ecb_binary32_to_float (uint32_t x)
1418 {
1419 float r;
1420
1421 #if ECB_STDFP
1422 memcpy (&r, &x, 4);
1423 #else
1424 /* emulation, only works for normals and subnormals and +0 */
1425 int neg = x >> 31;
1426 int e = (x >> 23) & 0xffU;
1427
1428 x &= 0x7fffffU;
1429
1430 if (e)
1431 x |= 0x800000U;
1432 else
1433 e = 1;
1434
1435 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1436 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1437
1438 r = neg ? -r : r;
1439 #endif
1440
1441 return r;
1442 }
1443
1444 /* convert a double to ieee double/binary64 */
1445 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1446 ecb_function_ ecb_const uint64_t
1447 ecb_double_to_binary64 (double x)
1448 {
1449 uint64_t r;
1450
1451 #if ECB_STDFP
1452 memcpy (&r, &x, 8);
1453 #else
1454 /* slow emulation, works for anything but -0 */
1455 uint64_t m;
1456 int e;
1457
1458 if (x == 0e0 ) return 0x0000000000000000U;
1459 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1460 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1461 if (x != x ) return 0X7ff7ffffffffffffU;
1462
1463 m = frexp (x, &e) * 0x20000000000000U;
1464
1465 r = m & 0x8000000000000000;;
1466
1467 if (r)
1468 m = -m;
1469
1470 if (e <= -1022)
1471 {
1472 m &= 0x1fffffffffffffU;
1473 m >>= (-1021 - e);
1474 e = -1022;
1475 }
1476
1477 r |= ((uint64_t)(e + 1022)) << 52;
1478 r |= m & 0xfffffffffffffU;
1479 #endif
1480
1481 return r;
1482 }
1483
1484 /* converts an ieee double/binary64 to a double */
1485 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1486 ecb_function_ ecb_const double
1487 ecb_binary64_to_double (uint64_t x)
1488 {
1489 double r;
1490
1491 #if ECB_STDFP
1492 memcpy (&r, &x, 8);
1493 #else
1494 /* emulation, only works for normals and subnormals and +0 */
1495 int neg = x >> 63;
1496 int e = (x >> 52) & 0x7ffU;
1497
1498 x &= 0xfffffffffffffU;
1499
1500 if (e)
1501 x |= 0x10000000000000U;
1502 else
1503 e = 1;
1504
1505 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1506 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1507
1508 r = neg ? -r : r;
1509 #endif
1510
1511 return r;
1512 }
1513
1514 /* convert a float to ieee half/binary16 */
1515 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1516 ecb_function_ ecb_const uint16_t
1517 ecb_float_to_binary16 (float x)
1518 {
1519 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1520 }
1521
1522 /* convert an ieee half/binary16 to float */
1523 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1524 ecb_function_ ecb_const float
1525 ecb_binary16_to_float (uint16_t x)
1526 {
1527 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1528 }
1529
1530#endif
1531
1532#endif
1533
1534/* ECB.H END */
1535
1536#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1537/* if your architecture doesn't need memory fences, e.g. because it is
1538 * single-cpu/core, or if you use libev in a project that doesn't use libev
1539 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1540 * libev, in which cases the memory fences become nops.
1541 * alternatively, you can remove this #error and link against libpthread,
1542 * which will then provide the memory fences.
1543 */
1544# error "memory fences not defined for your architecture, please report"
1545#endif
1546
1547#ifndef ECB_MEMORY_FENCE
1548# define ECB_MEMORY_FENCE do { } while (0)
1549# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1550# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1551#endif
1552
1553#define expect_false(cond) ecb_expect_false (cond)
1554#define expect_true(cond) ecb_expect_true (cond)
1555#define noinline ecb_noinline
1556
476#define inline_size static inline 1557#define inline_size ecb_inline
477 1558
478#if EV_FEATURE_CODE 1559#if EV_FEATURE_CODE
479# define inline_speed static inline 1560# define inline_speed ecb_inline
480#else 1561#else
481# define inline_speed static noinline 1562# define inline_speed noinline static
482#endif 1563#endif
483 1564
484#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1565#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
485 1566
486#if EV_MINPRI == EV_MAXPRI 1567#if EV_MINPRI == EV_MAXPRI
487# define ABSPRI(w) (((W)w), 0) 1568# define ABSPRI(w) (((W)w), 0)
488#else 1569#else
489# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1570# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
490#endif 1571#endif
491 1572
492#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1573#define EMPTY /* required for microsofts broken pseudo-c compiler */
493#define EMPTY2(a,b) /* used to suppress some warnings */
494 1574
495typedef ev_watcher *W; 1575typedef ev_watcher *W;
496typedef ev_watcher_list *WL; 1576typedef ev_watcher_list *WL;
497typedef ev_watcher_time *WT; 1577typedef ev_watcher_time *WT;
498 1578
… …
523# include "ev_win32.c" 1603# include "ev_win32.c"
524#endif 1604#endif
525 1605
526/*****************************************************************************/ 1606/*****************************************************************************/
527 1607
1608#if EV_USE_LINUXAIO
1609# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
1610#endif
1611
1612/* define a suitable floor function (only used by periodics atm) */
1613
1614#if EV_USE_FLOOR
1615# include <math.h>
1616# define ev_floor(v) floor (v)
1617#else
1618
1619#include <float.h>
1620
1621/* a floor() replacement function, should be independent of ev_tstamp type */
1622noinline
1623static ev_tstamp
1624ev_floor (ev_tstamp v)
1625{
1626 /* the choice of shift factor is not terribly important */
1627#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1628 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1629#else
1630 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1631#endif
1632
1633 /* argument too large for an unsigned long? */
1634 if (expect_false (v >= shift))
1635 {
1636 ev_tstamp f;
1637
1638 if (v == v - 1.)
1639 return v; /* very large number */
1640
1641 f = shift * ev_floor (v * (1. / shift));
1642 return f + ev_floor (v - f);
1643 }
1644
1645 /* special treatment for negative args? */
1646 if (expect_false (v < 0.))
1647 {
1648 ev_tstamp f = -ev_floor (-v);
1649
1650 return f - (f == v ? 0 : 1);
1651 }
1652
1653 /* fits into an unsigned long */
1654 return (unsigned long)v;
1655}
1656
1657#endif
1658
1659/*****************************************************************************/
1660
1661#ifdef __linux
1662# include <sys/utsname.h>
1663#endif
1664
1665noinline ecb_cold
1666static unsigned int
1667ev_linux_version (void)
1668{
1669#ifdef __linux
1670 unsigned int v = 0;
1671 struct utsname buf;
1672 int i;
1673 char *p = buf.release;
1674
1675 if (uname (&buf))
1676 return 0;
1677
1678 for (i = 3+1; --i; )
1679 {
1680 unsigned int c = 0;
1681
1682 for (;;)
1683 {
1684 if (*p >= '0' && *p <= '9')
1685 c = c * 10 + *p++ - '0';
1686 else
1687 {
1688 p += *p == '.';
1689 break;
1690 }
1691 }
1692
1693 v = (v << 8) | c;
1694 }
1695
1696 return v;
1697#else
1698 return 0;
1699#endif
1700}
1701
1702/*****************************************************************************/
1703
528#if EV_AVOID_STDIO 1704#if EV_AVOID_STDIO
529static void noinline 1705noinline ecb_cold
1706static void
530ev_printerr (const char *msg) 1707ev_printerr (const char *msg)
531{ 1708{
532 write (STDERR_FILENO, msg, strlen (msg)); 1709 write (STDERR_FILENO, msg, strlen (msg));
533} 1710}
534#endif 1711#endif
535 1712
536static void (*syserr_cb)(const char *msg); 1713static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
537 1714
1715ecb_cold
538void 1716void
539ev_set_syserr_cb (void (*cb)(const char *msg)) 1717ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
540{ 1718{
541 syserr_cb = cb; 1719 syserr_cb = cb;
542} 1720}
543 1721
544static void noinline 1722noinline ecb_cold
1723static void
545ev_syserr (const char *msg) 1724ev_syserr (const char *msg)
546{ 1725{
547 if (!msg) 1726 if (!msg)
548 msg = "(libev) system error"; 1727 msg = "(libev) system error";
549 1728
550 if (syserr_cb) 1729 if (syserr_cb)
551 syserr_cb (msg); 1730 syserr_cb (msg);
552 else 1731 else
553 { 1732 {
554#if EV_AVOID_STDIO 1733#if EV_AVOID_STDIO
555 const char *err = strerror (errno);
556
557 ev_printerr (msg); 1734 ev_printerr (msg);
558 ev_printerr (": "); 1735 ev_printerr (": ");
559 ev_printerr (err); 1736 ev_printerr (strerror (errno));
560 ev_printerr ("\n"); 1737 ev_printerr ("\n");
561#else 1738#else
562 perror (msg); 1739 perror (msg);
563#endif 1740#endif
564 abort (); 1741 abort ();
565 } 1742 }
566} 1743}
567 1744
568static void * 1745static void *
569ev_realloc_emul (void *ptr, long size) 1746ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
570{ 1747{
571#if __GLIBC__
572 return realloc (ptr, size);
573#else
574 /* some systems, notably openbsd and darwin, fail to properly 1748 /* some systems, notably openbsd and darwin, fail to properly
575 * implement realloc (x, 0) (as required by both ansi c-89 and 1749 * implement realloc (x, 0) (as required by both ansi c-89 and
576 * the single unix specification, so work around them here. 1750 * the single unix specification, so work around them here.
1751 * recently, also (at least) fedora and debian started breaking it,
1752 * despite documenting it otherwise.
577 */ 1753 */
578 1754
579 if (size) 1755 if (size)
580 return realloc (ptr, size); 1756 return realloc (ptr, size);
581 1757
582 free (ptr); 1758 free (ptr);
583 return 0; 1759 return 0;
584#endif
585} 1760}
586 1761
587static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1762static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
588 1763
1764ecb_cold
589void 1765void
590ev_set_allocator (void *(*cb)(void *ptr, long size)) 1766ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
591{ 1767{
592 alloc = cb; 1768 alloc = cb;
593} 1769}
594 1770
595inline_speed void * 1771inline_speed void *
… …
598 ptr = alloc (ptr, size); 1774 ptr = alloc (ptr, size);
599 1775
600 if (!ptr && size) 1776 if (!ptr && size)
601 { 1777 {
602#if EV_AVOID_STDIO 1778#if EV_AVOID_STDIO
603 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1779 ev_printerr ("(libev) memory allocation failed, aborting.\n");
604#else 1780#else
605 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1781 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
606#endif 1782#endif
607 abort (); 1783 abort ();
608 } 1784 }
609 1785
610 return ptr; 1786 return ptr;
… …
622typedef struct 1798typedef struct
623{ 1799{
624 WL head; 1800 WL head;
625 unsigned char events; /* the events watched for */ 1801 unsigned char events; /* the events watched for */
626 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ 1802 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
627 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1803 unsigned char emask; /* some backends store the actual kernel mask in here */
628 unsigned char unused; 1804 unsigned char unused;
629#if EV_USE_EPOLL 1805#if EV_USE_EPOLL
630 unsigned int egen; /* generation counter to counter epoll bugs */ 1806 unsigned int egen; /* generation counter to counter epoll bugs */
631#endif 1807#endif
632#if EV_SELECT_IS_WINSOCKET 1808#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
633 SOCKET handle; 1809 SOCKET handle;
1810#endif
1811#if EV_USE_IOCP
1812 OVERLAPPED or, ow;
634#endif 1813#endif
635} ANFD; 1814} ANFD;
636 1815
637/* stores the pending event set for a given watcher */ 1816/* stores the pending event set for a given watcher */
638typedef struct 1817typedef struct
… …
680 #undef VAR 1859 #undef VAR
681 }; 1860 };
682 #include "ev_wrap.h" 1861 #include "ev_wrap.h"
683 1862
684 static struct ev_loop default_loop_struct; 1863 static struct ev_loop default_loop_struct;
685 struct ev_loop *ev_default_loop_ptr; 1864 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
686 1865
687#else 1866#else
688 1867
689 ev_tstamp ev_rt_now; 1868 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
690 #define VAR(name,decl) static decl; 1869 #define VAR(name,decl) static decl;
691 #include "ev_vars.h" 1870 #include "ev_vars.h"
692 #undef VAR 1871 #undef VAR
693 1872
694 static int ev_default_loop_ptr; 1873 static int ev_default_loop_ptr;
… …
709 1888
710/*****************************************************************************/ 1889/*****************************************************************************/
711 1890
712#ifndef EV_HAVE_EV_TIME 1891#ifndef EV_HAVE_EV_TIME
713ev_tstamp 1892ev_tstamp
714ev_time (void) 1893ev_time (void) EV_NOEXCEPT
715{ 1894{
716#if EV_USE_REALTIME 1895#if EV_USE_REALTIME
717 if (expect_true (have_realtime)) 1896 if (expect_true (have_realtime))
718 { 1897 {
719 struct timespec ts; 1898 struct timespec ts;
… …
743 return ev_time (); 1922 return ev_time ();
744} 1923}
745 1924
746#if EV_MULTIPLICITY 1925#if EV_MULTIPLICITY
747ev_tstamp 1926ev_tstamp
748ev_now (EV_P) 1927ev_now (EV_P) EV_NOEXCEPT
749{ 1928{
750 return ev_rt_now; 1929 return ev_rt_now;
751} 1930}
752#endif 1931#endif
753 1932
754void 1933void
755ev_sleep (ev_tstamp delay) 1934ev_sleep (ev_tstamp delay) EV_NOEXCEPT
756{ 1935{
757 if (delay > 0.) 1936 if (delay > 0.)
758 { 1937 {
759#if EV_USE_NANOSLEEP 1938#if EV_USE_NANOSLEEP
760 struct timespec ts; 1939 struct timespec ts;
761 1940
762 EV_TS_SET (ts, delay); 1941 EV_TS_SET (ts, delay);
763 nanosleep (&ts, 0); 1942 nanosleep (&ts, 0);
764#elif defined(_WIN32) 1943#elif defined _WIN32
1944 /* maybe this should round up, as ms is very low resolution */
1945 /* compared to select (µs) or nanosleep (ns) */
765 Sleep ((unsigned long)(delay * 1e3)); 1946 Sleep ((unsigned long)(delay * 1e3));
766#else 1947#else
767 struct timeval tv; 1948 struct timeval tv;
768 1949
769 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1950 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
788 1969
789 do 1970 do
790 ncur <<= 1; 1971 ncur <<= 1;
791 while (cnt > ncur); 1972 while (cnt > ncur);
792 1973
793 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1974 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
794 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1975 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
795 { 1976 {
796 ncur *= elem; 1977 ncur *= elem;
797 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1978 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
798 ncur = ncur - sizeof (void *) * 4; 1979 ncur = ncur - sizeof (void *) * 4;
… …
800 } 1981 }
801 1982
802 return ncur; 1983 return ncur;
803} 1984}
804 1985
805static noinline void * 1986noinline ecb_cold
1987static void *
806array_realloc (int elem, void *base, int *cur, int cnt) 1988array_realloc (int elem, void *base, int *cur, int cnt)
807{ 1989{
808 *cur = array_nextsize (elem, *cur, cnt); 1990 *cur = array_nextsize (elem, *cur, cnt);
809 return ev_realloc (base, elem * *cur); 1991 return ev_realloc (base, elem * *cur);
810} 1992}
811 1993
1994#define array_needsize_noinit(base,offset,count)
1995
812#define array_init_zero(base,count) \ 1996#define array_needsize_zerofill(base,offset,count) \
813 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1997 memset ((void *)(base + offset), 0, sizeof (*(base)) * (count))
814 1998
815#define array_needsize(type,base,cur,cnt,init) \ 1999#define array_needsize(type,base,cur,cnt,init) \
816 if (expect_false ((cnt) > (cur))) \ 2000 if (expect_false ((cnt) > (cur))) \
817 { \ 2001 { \
818 int ocur_ = (cur); \ 2002 ecb_unused int ocur_ = (cur); \
819 (base) = (type *)array_realloc \ 2003 (base) = (type *)array_realloc \
820 (sizeof (type), (base), &(cur), (cnt)); \ 2004 (sizeof (type), (base), &(cur), (cnt)); \
821 init ((base) + (ocur_), (cur) - ocur_); \ 2005 init ((base), ocur_, ((cur) - ocur_)); \
822 } 2006 }
823 2007
824#if 0 2008#if 0
825#define array_slim(type,stem) \ 2009#define array_slim(type,stem) \
826 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 2010 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
… …
835 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 2019 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
836 2020
837/*****************************************************************************/ 2021/*****************************************************************************/
838 2022
839/* dummy callback for pending events */ 2023/* dummy callback for pending events */
840static void noinline 2024noinline
2025static void
841pendingcb (EV_P_ ev_prepare *w, int revents) 2026pendingcb (EV_P_ ev_prepare *w, int revents)
842{ 2027{
843} 2028}
844 2029
845void noinline 2030noinline
2031void
846ev_feed_event (EV_P_ void *w, int revents) 2032ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
847{ 2033{
848 W w_ = (W)w; 2034 W w_ = (W)w;
849 int pri = ABSPRI (w_); 2035 int pri = ABSPRI (w_);
850 2036
851 if (expect_false (w_->pending)) 2037 if (expect_false (w_->pending))
852 pendings [pri][w_->pending - 1].events |= revents; 2038 pendings [pri][w_->pending - 1].events |= revents;
853 else 2039 else
854 { 2040 {
855 w_->pending = ++pendingcnt [pri]; 2041 w_->pending = ++pendingcnt [pri];
856 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2042 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
857 pendings [pri][w_->pending - 1].w = w_; 2043 pendings [pri][w_->pending - 1].w = w_;
858 pendings [pri][w_->pending - 1].events = revents; 2044 pendings [pri][w_->pending - 1].events = revents;
859 } 2045 }
2046
2047 pendingpri = NUMPRI - 1;
860} 2048}
861 2049
862inline_speed void 2050inline_speed void
863feed_reverse (EV_P_ W w) 2051feed_reverse (EV_P_ W w)
864{ 2052{
865 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); 2053 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
866 rfeeds [rfeedcnt++] = w; 2054 rfeeds [rfeedcnt++] = w;
867} 2055}
868 2056
869inline_size void 2057inline_size void
870feed_reverse_done (EV_P_ int revents) 2058feed_reverse_done (EV_P_ int revents)
… …
910 if (expect_true (!anfd->reify)) 2098 if (expect_true (!anfd->reify))
911 fd_event_nocheck (EV_A_ fd, revents); 2099 fd_event_nocheck (EV_A_ fd, revents);
912} 2100}
913 2101
914void 2102void
915ev_feed_fd_event (EV_P_ int fd, int revents) 2103ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
916{ 2104{
917 if (fd >= 0 && fd < anfdmax) 2105 if (fd >= 0 && fd < anfdmax)
918 fd_event_nocheck (EV_A_ fd, revents); 2106 fd_event_nocheck (EV_A_ fd, revents);
919} 2107}
920 2108
… …
923inline_size void 2111inline_size void
924fd_reify (EV_P) 2112fd_reify (EV_P)
925{ 2113{
926 int i; 2114 int i;
927 2115
2116#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2117 for (i = 0; i < fdchangecnt; ++i)
2118 {
2119 int fd = fdchanges [i];
2120 ANFD *anfd = anfds + fd;
2121
2122 if (anfd->reify & EV__IOFDSET && anfd->head)
2123 {
2124 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2125
2126 if (handle != anfd->handle)
2127 {
2128 unsigned long arg;
2129
2130 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2131
2132 /* handle changed, but fd didn't - we need to do it in two steps */
2133 backend_modify (EV_A_ fd, anfd->events, 0);
2134 anfd->events = 0;
2135 anfd->handle = handle;
2136 }
2137 }
2138 }
2139#endif
2140
928 for (i = 0; i < fdchangecnt; ++i) 2141 for (i = 0; i < fdchangecnt; ++i)
929 { 2142 {
930 int fd = fdchanges [i]; 2143 int fd = fdchanges [i];
931 ANFD *anfd = anfds + fd; 2144 ANFD *anfd = anfds + fd;
932 ev_io *w; 2145 ev_io *w;
… …
934 unsigned char o_events = anfd->events; 2147 unsigned char o_events = anfd->events;
935 unsigned char o_reify = anfd->reify; 2148 unsigned char o_reify = anfd->reify;
936 2149
937 anfd->reify = 0; 2150 anfd->reify = 0;
938 2151
939#if EV_SELECT_IS_WINSOCKET
940 if (o_reify & EV__IOFDSET)
941 {
942 unsigned long arg;
943 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
944 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
945 }
946#endif
947
948 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 2152 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
949 { 2153 {
950 anfd->events = 0; 2154 anfd->events = 0;
951 2155
952 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2156 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
962 2166
963 fdchangecnt = 0; 2167 fdchangecnt = 0;
964} 2168}
965 2169
966/* something about the given fd changed */ 2170/* something about the given fd changed */
967inline_size void 2171inline_size
2172void
968fd_change (EV_P_ int fd, int flags) 2173fd_change (EV_P_ int fd, int flags)
969{ 2174{
970 unsigned char reify = anfds [fd].reify; 2175 unsigned char reify = anfds [fd].reify;
971 anfds [fd].reify |= flags; 2176 anfds [fd].reify |= flags;
972 2177
973 if (expect_true (!reify)) 2178 if (expect_true (!reify))
974 { 2179 {
975 ++fdchangecnt; 2180 ++fdchangecnt;
976 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2181 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
977 fdchanges [fdchangecnt - 1] = fd; 2182 fdchanges [fdchangecnt - 1] = fd;
978 } 2183 }
979} 2184}
980 2185
981/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 2186/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
982inline_speed void 2187inline_speed ecb_cold void
983fd_kill (EV_P_ int fd) 2188fd_kill (EV_P_ int fd)
984{ 2189{
985 ev_io *w; 2190 ev_io *w;
986 2191
987 while ((w = (ev_io *)anfds [fd].head)) 2192 while ((w = (ev_io *)anfds [fd].head))
… …
990 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2195 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
991 } 2196 }
992} 2197}
993 2198
994/* check whether the given fd is actually valid, for error recovery */ 2199/* check whether the given fd is actually valid, for error recovery */
995inline_size int 2200inline_size ecb_cold int
996fd_valid (int fd) 2201fd_valid (int fd)
997{ 2202{
998#ifdef _WIN32 2203#ifdef _WIN32
999 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2204 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1000#else 2205#else
1001 return fcntl (fd, F_GETFD) != -1; 2206 return fcntl (fd, F_GETFD) != -1;
1002#endif 2207#endif
1003} 2208}
1004 2209
1005/* called on EBADF to verify fds */ 2210/* called on EBADF to verify fds */
1006static void noinline 2211noinline ecb_cold
2212static void
1007fd_ebadf (EV_P) 2213fd_ebadf (EV_P)
1008{ 2214{
1009 int fd; 2215 int fd;
1010 2216
1011 for (fd = 0; fd < anfdmax; ++fd) 2217 for (fd = 0; fd < anfdmax; ++fd)
… …
1013 if (!fd_valid (fd) && errno == EBADF) 2219 if (!fd_valid (fd) && errno == EBADF)
1014 fd_kill (EV_A_ fd); 2220 fd_kill (EV_A_ fd);
1015} 2221}
1016 2222
1017/* called on ENOMEM in select/poll to kill some fds and retry */ 2223/* called on ENOMEM in select/poll to kill some fds and retry */
1018static void noinline 2224noinline ecb_cold
2225static void
1019fd_enomem (EV_P) 2226fd_enomem (EV_P)
1020{ 2227{
1021 int fd; 2228 int fd;
1022 2229
1023 for (fd = anfdmax; fd--; ) 2230 for (fd = anfdmax; fd--; )
… …
1027 break; 2234 break;
1028 } 2235 }
1029} 2236}
1030 2237
1031/* usually called after fork if backend needs to re-arm all fds from scratch */ 2238/* usually called after fork if backend needs to re-arm all fds from scratch */
1032static void noinline 2239noinline
2240static void
1033fd_rearm_all (EV_P) 2241fd_rearm_all (EV_P)
1034{ 2242{
1035 int fd; 2243 int fd;
1036 2244
1037 for (fd = 0; fd < anfdmax; ++fd) 2245 for (fd = 0; fd < anfdmax; ++fd)
… …
1218 2426
1219/*****************************************************************************/ 2427/*****************************************************************************/
1220 2428
1221#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2429#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1222 2430
1223static void noinline 2431noinline ecb_cold
2432static void
1224evpipe_init (EV_P) 2433evpipe_init (EV_P)
1225{ 2434{
1226 if (!ev_is_active (&pipe_w)) 2435 if (!ev_is_active (&pipe_w))
1227 { 2436 {
2437 int fds [2];
2438
1228# if EV_USE_EVENTFD 2439# if EV_USE_EVENTFD
2440 fds [0] = -1;
1229 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2441 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1230 if (evfd < 0 && errno == EINVAL) 2442 if (fds [1] < 0 && errno == EINVAL)
1231 evfd = eventfd (0, 0); 2443 fds [1] = eventfd (0, 0);
1232 2444
1233 if (evfd >= 0) 2445 if (fds [1] < 0)
2446# endif
1234 { 2447 {
2448 while (pipe (fds))
2449 ev_syserr ("(libev) error creating signal/async pipe");
2450
2451 fd_intern (fds [0]);
2452 }
2453
1235 evpipe [0] = -1; 2454 evpipe [0] = fds [0];
1236 fd_intern (evfd); /* doing it twice doesn't hurt */ 2455
1237 ev_io_set (&pipe_w, evfd, EV_READ); 2456 if (evpipe [1] < 0)
2457 evpipe [1] = fds [1]; /* first call, set write fd */
2458 else
2459 {
2460 /* on subsequent calls, do not change evpipe [1] */
2461 /* so that evpipe_write can always rely on its value. */
2462 /* this branch does not do anything sensible on windows, */
2463 /* so must not be executed on windows */
2464
2465 dup2 (fds [1], evpipe [1]);
2466 close (fds [1]);
2467 }
2468
2469 fd_intern (evpipe [1]);
2470
2471 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2472 ev_io_start (EV_A_ &pipe_w);
2473 ev_unref (EV_A); /* watcher should not keep loop alive */
2474 }
2475}
2476
2477inline_speed void
2478evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2479{
2480 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2481
2482 if (expect_true (*flag))
2483 return;
2484
2485 *flag = 1;
2486 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2487
2488 pipe_write_skipped = 1;
2489
2490 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2491
2492 if (pipe_write_wanted)
2493 {
2494 int old_errno;
2495
2496 pipe_write_skipped = 0;
2497 ECB_MEMORY_FENCE_RELEASE;
2498
2499 old_errno = errno; /* save errno because write will clobber it */
2500
2501#if EV_USE_EVENTFD
2502 if (evpipe [0] < 0)
2503 {
2504 uint64_t counter = 1;
2505 write (evpipe [1], &counter, sizeof (uint64_t));
1238 } 2506 }
1239 else 2507 else
1240# endif 2508#endif
1241 { 2509 {
1242 while (pipe (evpipe)) 2510#ifdef _WIN32
1243 ev_syserr ("(libev) error creating signal/async pipe"); 2511 WSABUF buf;
1244 2512 DWORD sent;
1245 fd_intern (evpipe [0]); 2513 buf.buf = (char *)&buf;
1246 fd_intern (evpipe [1]); 2514 buf.len = 1;
1247 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2515 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2516#else
2517 write (evpipe [1], &(evpipe [1]), 1);
2518#endif
1248 } 2519 }
1249
1250 ev_io_start (EV_A_ &pipe_w);
1251 ev_unref (EV_A); /* watcher should not keep loop alive */
1252 }
1253}
1254
1255inline_size void
1256evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1257{
1258 if (!*flag)
1259 {
1260 int old_errno = errno; /* save errno because write might clobber it */
1261 char dummy;
1262
1263 *flag = 1;
1264
1265#if EV_USE_EVENTFD
1266 if (evfd >= 0)
1267 {
1268 uint64_t counter = 1;
1269 write (evfd, &counter, sizeof (uint64_t));
1270 }
1271 else
1272#endif
1273 /* win32 people keep sending patches that change this write() to send() */
1274 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1275 /* so when you think this write should be a send instead, please find out */
1276 /* where your send() is from - it's definitely not the microsoft send, and */
1277 /* tell me. thank you. */
1278 write (evpipe [1], &dummy, 1);
1279 2520
1280 errno = old_errno; 2521 errno = old_errno;
1281 } 2522 }
1282} 2523}
1283 2524
… …
1286static void 2527static void
1287pipecb (EV_P_ ev_io *iow, int revents) 2528pipecb (EV_P_ ev_io *iow, int revents)
1288{ 2529{
1289 int i; 2530 int i;
1290 2531
2532 if (revents & EV_READ)
2533 {
1291#if EV_USE_EVENTFD 2534#if EV_USE_EVENTFD
1292 if (evfd >= 0) 2535 if (evpipe [0] < 0)
1293 { 2536 {
1294 uint64_t counter; 2537 uint64_t counter;
1295 read (evfd, &counter, sizeof (uint64_t)); 2538 read (evpipe [1], &counter, sizeof (uint64_t));
1296 } 2539 }
1297 else 2540 else
1298#endif 2541#endif
1299 { 2542 {
1300 char dummy; 2543 char dummy[4];
1301 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2544#ifdef _WIN32
2545 WSABUF buf;
2546 DWORD recvd;
2547 DWORD flags = 0;
2548 buf.buf = dummy;
2549 buf.len = sizeof (dummy);
2550 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2551#else
1302 read (evpipe [0], &dummy, 1); 2552 read (evpipe [0], &dummy, sizeof (dummy));
2553#endif
2554 }
1303 } 2555 }
1304 2556
2557 pipe_write_skipped = 0;
2558
2559 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2560
2561#if EV_SIGNAL_ENABLE
1305 if (sig_pending) 2562 if (sig_pending)
1306 { 2563 {
1307 sig_pending = 0; 2564 sig_pending = 0;
2565
2566 ECB_MEMORY_FENCE;
1308 2567
1309 for (i = EV_NSIG - 1; i--; ) 2568 for (i = EV_NSIG - 1; i--; )
1310 if (expect_false (signals [i].pending)) 2569 if (expect_false (signals [i].pending))
1311 ev_feed_signal_event (EV_A_ i + 1); 2570 ev_feed_signal_event (EV_A_ i + 1);
1312 } 2571 }
2572#endif
1313 2573
1314#if EV_ASYNC_ENABLE 2574#if EV_ASYNC_ENABLE
1315 if (async_pending) 2575 if (async_pending)
1316 { 2576 {
1317 async_pending = 0; 2577 async_pending = 0;
2578
2579 ECB_MEMORY_FENCE;
1318 2580
1319 for (i = asynccnt; i--; ) 2581 for (i = asynccnt; i--; )
1320 if (asyncs [i]->sent) 2582 if (asyncs [i]->sent)
1321 { 2583 {
1322 asyncs [i]->sent = 0; 2584 asyncs [i]->sent = 0;
2585 ECB_MEMORY_FENCE_RELEASE;
1323 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2586 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1324 } 2587 }
1325 } 2588 }
1326#endif 2589#endif
1327} 2590}
1328 2591
1329/*****************************************************************************/ 2592/*****************************************************************************/
1330 2593
2594void
2595ev_feed_signal (int signum) EV_NOEXCEPT
2596{
2597#if EV_MULTIPLICITY
2598 EV_P;
2599 ECB_MEMORY_FENCE_ACQUIRE;
2600 EV_A = signals [signum - 1].loop;
2601
2602 if (!EV_A)
2603 return;
2604#endif
2605
2606 signals [signum - 1].pending = 1;
2607 evpipe_write (EV_A_ &sig_pending);
2608}
2609
1331static void 2610static void
1332ev_sighandler (int signum) 2611ev_sighandler (int signum)
1333{ 2612{
1334#if EV_MULTIPLICITY
1335 EV_P = signals [signum - 1].loop;
1336#endif
1337
1338#ifdef _WIN32 2613#ifdef _WIN32
1339 signal (signum, ev_sighandler); 2614 signal (signum, ev_sighandler);
1340#endif 2615#endif
1341 2616
1342 signals [signum - 1].pending = 1; 2617 ev_feed_signal (signum);
1343 evpipe_write (EV_A_ &sig_pending);
1344} 2618}
1345 2619
1346void noinline 2620noinline
2621void
1347ev_feed_signal_event (EV_P_ int signum) 2622ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
1348{ 2623{
1349 WL w; 2624 WL w;
1350 2625
1351 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2626 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1352 return; 2627 return;
1353 2628
1354 --signum; 2629 --signum;
1355 2630
1356#if EV_MULTIPLICITY 2631#if EV_MULTIPLICITY
… …
1360 if (expect_false (signals [signum].loop != EV_A)) 2635 if (expect_false (signals [signum].loop != EV_A))
1361 return; 2636 return;
1362#endif 2637#endif
1363 2638
1364 signals [signum].pending = 0; 2639 signals [signum].pending = 0;
2640 ECB_MEMORY_FENCE_RELEASE;
1365 2641
1366 for (w = signals [signum].head; w; w = w->next) 2642 for (w = signals [signum].head; w; w = w->next)
1367 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2643 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1368} 2644}
1369 2645
… …
1448 2724
1449#endif 2725#endif
1450 2726
1451/*****************************************************************************/ 2727/*****************************************************************************/
1452 2728
2729#if EV_USE_IOCP
2730# include "ev_iocp.c"
2731#endif
1453#if EV_USE_PORT 2732#if EV_USE_PORT
1454# include "ev_port.c" 2733# include "ev_port.c"
1455#endif 2734#endif
1456#if EV_USE_KQUEUE 2735#if EV_USE_KQUEUE
1457# include "ev_kqueue.c" 2736# include "ev_kqueue.c"
1458#endif 2737#endif
1459#if EV_USE_EPOLL 2738#if EV_USE_EPOLL
1460# include "ev_epoll.c" 2739# include "ev_epoll.c"
1461#endif 2740#endif
2741#if EV_USE_LINUXAIO
2742# include "ev_linuxaio.c"
2743#endif
1462#if EV_USE_POLL 2744#if EV_USE_POLL
1463# include "ev_poll.c" 2745# include "ev_poll.c"
1464#endif 2746#endif
1465#if EV_USE_SELECT 2747#if EV_USE_SELECT
1466# include "ev_select.c" 2748# include "ev_select.c"
1467#endif 2749#endif
1468 2750
1469int 2751ecb_cold int
1470ev_version_major (void) 2752ev_version_major (void) EV_NOEXCEPT
1471{ 2753{
1472 return EV_VERSION_MAJOR; 2754 return EV_VERSION_MAJOR;
1473} 2755}
1474 2756
1475int 2757ecb_cold int
1476ev_version_minor (void) 2758ev_version_minor (void) EV_NOEXCEPT
1477{ 2759{
1478 return EV_VERSION_MINOR; 2760 return EV_VERSION_MINOR;
1479} 2761}
1480 2762
1481/* return true if we are running with elevated privileges and should ignore env variables */ 2763/* return true if we are running with elevated privileges and should ignore env variables */
1482int inline_size 2764inline_size ecb_cold int
1483enable_secure (void) 2765enable_secure (void)
1484{ 2766{
1485#ifdef _WIN32 2767#ifdef _WIN32
1486 return 0; 2768 return 0;
1487#else 2769#else
1488 return getuid () != geteuid () 2770 return getuid () != geteuid ()
1489 || getgid () != getegid (); 2771 || getgid () != getegid ();
1490#endif 2772#endif
1491} 2773}
1492 2774
2775ecb_cold
1493unsigned int 2776unsigned int
1494ev_supported_backends (void) 2777ev_supported_backends (void) EV_NOEXCEPT
1495{ 2778{
1496 unsigned int flags = 0; 2779 unsigned int flags = 0;
1497 2780
1498 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2781 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1499 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2782 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1500 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 2783 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2784 if (EV_USE_LINUXAIO) flags |= EVBACKEND_LINUXAIO;
1501 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 2785 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1502 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2786 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
1503 2787
1504 return flags; 2788 return flags;
1505} 2789}
1506 2790
2791ecb_cold
1507unsigned int 2792unsigned int
1508ev_recommended_backends (void) 2793ev_recommended_backends (void) EV_NOEXCEPT
1509{ 2794{
1510 unsigned int flags = ev_supported_backends (); 2795 unsigned int flags = ev_supported_backends ();
1511 2796
1512#ifndef __NetBSD__ 2797#ifndef __NetBSD__
1513 /* kqueue is borked on everything but netbsd apparently */ 2798 /* kqueue is borked on everything but netbsd apparently */
… …
1521#endif 2806#endif
1522#ifdef __FreeBSD__ 2807#ifdef __FreeBSD__
1523 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */ 2808 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1524#endif 2809#endif
1525 2810
2811 /* TODO: linuxaio is very experimental */
2812#if !EV_RECOMMEND_LINUXAIO
2813 flags &= ~EVBACKEND_LINUXAIO;
2814#endif
2815
1526 return flags; 2816 return flags;
1527} 2817}
1528 2818
2819ecb_cold
1529unsigned int 2820unsigned int
1530ev_embeddable_backends (void) 2821ev_embeddable_backends (void) EV_NOEXCEPT
1531{ 2822{
1532 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2823 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1533 2824
1534 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2825 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1535 /* please fix it and tell me how to detect the fix */ 2826 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1536 flags &= ~EVBACKEND_EPOLL; 2827 flags &= ~EVBACKEND_EPOLL;
1537 2828
1538 return flags; 2829 return flags;
1539} 2830}
1540 2831
1541unsigned int 2832unsigned int
1542ev_backend (EV_P) 2833ev_backend (EV_P) EV_NOEXCEPT
1543{ 2834{
1544 return backend; 2835 return backend;
1545} 2836}
1546 2837
1547#if EV_FEATURE_API 2838#if EV_FEATURE_API
1548unsigned int 2839unsigned int
1549ev_iteration (EV_P) 2840ev_iteration (EV_P) EV_NOEXCEPT
1550{ 2841{
1551 return loop_count; 2842 return loop_count;
1552} 2843}
1553 2844
1554unsigned int 2845unsigned int
1555ev_depth (EV_P) 2846ev_depth (EV_P) EV_NOEXCEPT
1556{ 2847{
1557 return loop_depth; 2848 return loop_depth;
1558} 2849}
1559 2850
1560void 2851void
1561ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2852ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1562{ 2853{
1563 io_blocktime = interval; 2854 io_blocktime = interval;
1564} 2855}
1565 2856
1566void 2857void
1567ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2858ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1568{ 2859{
1569 timeout_blocktime = interval; 2860 timeout_blocktime = interval;
1570} 2861}
1571 2862
1572void 2863void
1573ev_set_userdata (EV_P_ void *data) 2864ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
1574{ 2865{
1575 userdata = data; 2866 userdata = data;
1576} 2867}
1577 2868
1578void * 2869void *
1579ev_userdata (EV_P) 2870ev_userdata (EV_P) EV_NOEXCEPT
1580{ 2871{
1581 return userdata; 2872 return userdata;
1582} 2873}
1583 2874
2875void
1584void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2876ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
1585{ 2877{
1586 invoke_cb = invoke_pending_cb; 2878 invoke_cb = invoke_pending_cb;
1587} 2879}
1588 2880
2881void
1589void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2882ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
1590{ 2883{
1591 release_cb = release; 2884 release_cb = release;
1592 acquire_cb = acquire; 2885 acquire_cb = acquire;
1593} 2886}
1594#endif 2887#endif
1595 2888
1596/* initialise a loop structure, must be zero-initialised */ 2889/* initialise a loop structure, must be zero-initialised */
1597static void noinline 2890noinline ecb_cold
2891static void
1598loop_init (EV_P_ unsigned int flags) 2892loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1599{ 2893{
1600 if (!backend) 2894 if (!backend)
1601 { 2895 {
2896 origflags = flags;
2897
1602#if EV_USE_REALTIME 2898#if EV_USE_REALTIME
1603 if (!have_realtime) 2899 if (!have_realtime)
1604 { 2900 {
1605 struct timespec ts; 2901 struct timespec ts;
1606 2902
… …
1628 if (!(flags & EVFLAG_NOENV) 2924 if (!(flags & EVFLAG_NOENV)
1629 && !enable_secure () 2925 && !enable_secure ()
1630 && getenv ("LIBEV_FLAGS")) 2926 && getenv ("LIBEV_FLAGS"))
1631 flags = atoi (getenv ("LIBEV_FLAGS")); 2927 flags = atoi (getenv ("LIBEV_FLAGS"));
1632 2928
1633 ev_rt_now = ev_time (); 2929 ev_rt_now = ev_time ();
1634 mn_now = get_clock (); 2930 mn_now = get_clock ();
1635 now_floor = mn_now; 2931 now_floor = mn_now;
1636 rtmn_diff = ev_rt_now - mn_now; 2932 rtmn_diff = ev_rt_now - mn_now;
1637#if EV_FEATURE_API 2933#if EV_FEATURE_API
1638 invoke_cb = ev_invoke_pending; 2934 invoke_cb = ev_invoke_pending;
1639#endif 2935#endif
1640 2936
1641 io_blocktime = 0.; 2937 io_blocktime = 0.;
1642 timeout_blocktime = 0.; 2938 timeout_blocktime = 0.;
1643 backend = 0; 2939 backend = 0;
1644 backend_fd = -1; 2940 backend_fd = -1;
1645 sig_pending = 0; 2941 sig_pending = 0;
1646#if EV_ASYNC_ENABLE 2942#if EV_ASYNC_ENABLE
1647 async_pending = 0; 2943 async_pending = 0;
1648#endif 2944#endif
2945 pipe_write_skipped = 0;
2946 pipe_write_wanted = 0;
2947 evpipe [0] = -1;
2948 evpipe [1] = -1;
1649#if EV_USE_INOTIFY 2949#if EV_USE_INOTIFY
1650 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2950 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1651#endif 2951#endif
1652#if EV_USE_SIGNALFD 2952#if EV_USE_SIGNALFD
1653 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2953 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1654#endif 2954#endif
1655 2955
1656 if (!(flags & 0x0000ffffU)) 2956 if (!(flags & EVBACKEND_MASK))
1657 flags |= ev_recommended_backends (); 2957 flags |= ev_recommended_backends ();
1658 2958
2959#if EV_USE_IOCP
2960 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2961#endif
1659#if EV_USE_PORT 2962#if EV_USE_PORT
1660 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2963 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1661#endif 2964#endif
1662#if EV_USE_KQUEUE 2965#if EV_USE_KQUEUE
1663 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2966 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
2967#endif
2968#if EV_USE_LINUXAIO
2969 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
1664#endif 2970#endif
1665#if EV_USE_EPOLL 2971#if EV_USE_EPOLL
1666 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 2972 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1667#endif 2973#endif
1668#if EV_USE_POLL 2974#if EV_USE_POLL
1669 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 2975 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1670#endif 2976#endif
1671#if EV_USE_SELECT 2977#if EV_USE_SELECT
1672 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2978 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1673#endif 2979#endif
1674 2980
1675 ev_prepare_init (&pending_w, pendingcb); 2981 ev_prepare_init (&pending_w, pendingcb);
1676 2982
1677#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2983#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
… …
1680#endif 2986#endif
1681 } 2987 }
1682} 2988}
1683 2989
1684/* free up a loop structure */ 2990/* free up a loop structure */
1685static void noinline 2991ecb_cold
2992void
1686loop_destroy (EV_P) 2993ev_loop_destroy (EV_P)
1687{ 2994{
1688 int i; 2995 int i;
2996
2997#if EV_MULTIPLICITY
2998 /* mimic free (0) */
2999 if (!EV_A)
3000 return;
3001#endif
3002
3003#if EV_CLEANUP_ENABLE
3004 /* queue cleanup watchers (and execute them) */
3005 if (expect_false (cleanupcnt))
3006 {
3007 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
3008 EV_INVOKE_PENDING;
3009 }
3010#endif
3011
3012#if EV_CHILD_ENABLE
3013 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
3014 {
3015 ev_ref (EV_A); /* child watcher */
3016 ev_signal_stop (EV_A_ &childev);
3017 }
3018#endif
1689 3019
1690 if (ev_is_active (&pipe_w)) 3020 if (ev_is_active (&pipe_w))
1691 { 3021 {
1692 /*ev_ref (EV_A);*/ 3022 /*ev_ref (EV_A);*/
1693 /*ev_io_stop (EV_A_ &pipe_w);*/ 3023 /*ev_io_stop (EV_A_ &pipe_w);*/
1694 3024
1695#if EV_USE_EVENTFD
1696 if (evfd >= 0)
1697 close (evfd);
1698#endif
1699
1700 if (evpipe [0] >= 0)
1701 {
1702 EV_WIN32_CLOSE_FD (evpipe [0]); 3025 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1703 EV_WIN32_CLOSE_FD (evpipe [1]); 3026 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1704 }
1705 } 3027 }
1706 3028
1707#if EV_USE_SIGNALFD 3029#if EV_USE_SIGNALFD
1708 if (ev_is_active (&sigfd_w)) 3030 if (ev_is_active (&sigfd_w))
1709 close (sigfd); 3031 close (sigfd);
… …
1715#endif 3037#endif
1716 3038
1717 if (backend_fd >= 0) 3039 if (backend_fd >= 0)
1718 close (backend_fd); 3040 close (backend_fd);
1719 3041
3042#if EV_USE_IOCP
3043 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
3044#endif
1720#if EV_USE_PORT 3045#if EV_USE_PORT
1721 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3046 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1722#endif 3047#endif
1723#if EV_USE_KQUEUE 3048#if EV_USE_KQUEUE
1724 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3049 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3050#endif
3051#if EV_USE_LINUXAIO
3052 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
1725#endif 3053#endif
1726#if EV_USE_EPOLL 3054#if EV_USE_EPOLL
1727 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3055 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1728#endif 3056#endif
1729#if EV_USE_POLL 3057#if EV_USE_POLL
1730 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3058 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1731#endif 3059#endif
1732#if EV_USE_SELECT 3060#if EV_USE_SELECT
1733 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3061 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1734#endif 3062#endif
1735 3063
1736 for (i = NUMPRI; i--; ) 3064 for (i = NUMPRI; i--; )
1737 { 3065 {
1738 array_free (pending, [i]); 3066 array_free (pending, [i]);
… …
1751 array_free (periodic, EMPTY); 3079 array_free (periodic, EMPTY);
1752#endif 3080#endif
1753#if EV_FORK_ENABLE 3081#if EV_FORK_ENABLE
1754 array_free (fork, EMPTY); 3082 array_free (fork, EMPTY);
1755#endif 3083#endif
3084#if EV_CLEANUP_ENABLE
3085 array_free (cleanup, EMPTY);
3086#endif
1756 array_free (prepare, EMPTY); 3087 array_free (prepare, EMPTY);
1757 array_free (check, EMPTY); 3088 array_free (check, EMPTY);
1758#if EV_ASYNC_ENABLE 3089#if EV_ASYNC_ENABLE
1759 array_free (async, EMPTY); 3090 array_free (async, EMPTY);
1760#endif 3091#endif
1761 3092
1762 backend = 0; 3093 backend = 0;
3094
3095#if EV_MULTIPLICITY
3096 if (ev_is_default_loop (EV_A))
3097#endif
3098 ev_default_loop_ptr = 0;
3099#if EV_MULTIPLICITY
3100 else
3101 ev_free (EV_A);
3102#endif
1763} 3103}
1764 3104
1765#if EV_USE_INOTIFY 3105#if EV_USE_INOTIFY
1766inline_size void infy_fork (EV_P); 3106inline_size void infy_fork (EV_P);
1767#endif 3107#endif
1768 3108
1769inline_size void 3109inline_size void
1770loop_fork (EV_P) 3110loop_fork (EV_P)
1771{ 3111{
1772#if EV_USE_PORT 3112#if EV_USE_PORT
1773 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3113 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1774#endif 3114#endif
1775#if EV_USE_KQUEUE 3115#if EV_USE_KQUEUE
1776 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 3116 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3117#endif
3118#if EV_USE_LINUXAIO
3119 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
1777#endif 3120#endif
1778#if EV_USE_EPOLL 3121#if EV_USE_EPOLL
1779 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3122 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1780#endif 3123#endif
1781#if EV_USE_INOTIFY 3124#if EV_USE_INOTIFY
1782 infy_fork (EV_A); 3125 infy_fork (EV_A);
1783#endif 3126#endif
1784 3127
3128#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1785 if (ev_is_active (&pipe_w)) 3129 if (ev_is_active (&pipe_w) && postfork != 2)
1786 { 3130 {
1787 /* this "locks" the handlers against writing to the pipe */ 3131 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1788 /* while we modify the fd vars */
1789 sig_pending = 1;
1790#if EV_ASYNC_ENABLE
1791 async_pending = 1;
1792#endif
1793 3132
1794 ev_ref (EV_A); 3133 ev_ref (EV_A);
1795 ev_io_stop (EV_A_ &pipe_w); 3134 ev_io_stop (EV_A_ &pipe_w);
1796 3135
1797#if EV_USE_EVENTFD
1798 if (evfd >= 0)
1799 close (evfd);
1800#endif
1801
1802 if (evpipe [0] >= 0) 3136 if (evpipe [0] >= 0)
1803 {
1804 EV_WIN32_CLOSE_FD (evpipe [0]); 3137 EV_WIN32_CLOSE_FD (evpipe [0]);
1805 EV_WIN32_CLOSE_FD (evpipe [1]);
1806 }
1807 3138
1808#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1809 evpipe_init (EV_A); 3139 evpipe_init (EV_A);
1810 /* now iterate over everything, in case we missed something */ 3140 /* iterate over everything, in case we missed something before */
1811 pipecb (EV_A_ &pipe_w, EV_READ); 3141 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1812#endif
1813 } 3142 }
3143#endif
1814 3144
1815 postfork = 0; 3145 postfork = 0;
1816} 3146}
1817 3147
1818#if EV_MULTIPLICITY 3148#if EV_MULTIPLICITY
1819 3149
3150ecb_cold
1820struct ev_loop * 3151struct ev_loop *
1821ev_loop_new (unsigned int flags) 3152ev_loop_new (unsigned int flags) EV_NOEXCEPT
1822{ 3153{
1823 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3154 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1824 3155
1825 memset (EV_A, 0, sizeof (struct ev_loop)); 3156 memset (EV_A, 0, sizeof (struct ev_loop));
1826 loop_init (EV_A_ flags); 3157 loop_init (EV_A_ flags);
1827 3158
1828 if (ev_backend (EV_A)) 3159 if (ev_backend (EV_A))
1829 return EV_A; 3160 return EV_A;
1830 3161
3162 ev_free (EV_A);
1831 return 0; 3163 return 0;
1832} 3164}
1833 3165
1834void
1835ev_loop_destroy (EV_P)
1836{
1837 loop_destroy (EV_A);
1838 ev_free (loop);
1839}
1840
1841void
1842ev_loop_fork (EV_P)
1843{
1844 postfork = 1; /* must be in line with ev_default_fork */
1845}
1846#endif /* multiplicity */ 3166#endif /* multiplicity */
1847 3167
1848#if EV_VERIFY 3168#if EV_VERIFY
1849static void noinline 3169noinline ecb_cold
3170static void
1850verify_watcher (EV_P_ W w) 3171verify_watcher (EV_P_ W w)
1851{ 3172{
1852 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3173 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1853 3174
1854 if (w->pending) 3175 if (w->pending)
1855 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3176 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1856} 3177}
1857 3178
1858static void noinline 3179noinline ecb_cold
3180static void
1859verify_heap (EV_P_ ANHE *heap, int N) 3181verify_heap (EV_P_ ANHE *heap, int N)
1860{ 3182{
1861 int i; 3183 int i;
1862 3184
1863 for (i = HEAP0; i < N + HEAP0; ++i) 3185 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1868 3190
1869 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3191 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1870 } 3192 }
1871} 3193}
1872 3194
1873static void noinline 3195noinline ecb_cold
3196static void
1874array_verify (EV_P_ W *ws, int cnt) 3197array_verify (EV_P_ W *ws, int cnt)
1875{ 3198{
1876 while (cnt--) 3199 while (cnt--)
1877 { 3200 {
1878 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3201 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1880 } 3203 }
1881} 3204}
1882#endif 3205#endif
1883 3206
1884#if EV_FEATURE_API 3207#if EV_FEATURE_API
1885void 3208void ecb_cold
1886ev_verify (EV_P) 3209ev_verify (EV_P) EV_NOEXCEPT
1887{ 3210{
1888#if EV_VERIFY 3211#if EV_VERIFY
1889 int i; 3212 int i;
1890 WL w; 3213 WL w, w2;
1891 3214
1892 assert (activecnt >= -1); 3215 assert (activecnt >= -1);
1893 3216
1894 assert (fdchangemax >= fdchangecnt); 3217 assert (fdchangemax >= fdchangecnt);
1895 for (i = 0; i < fdchangecnt; ++i) 3218 for (i = 0; i < fdchangecnt; ++i)
1896 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3219 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1897 3220
1898 assert (anfdmax >= 0); 3221 assert (anfdmax >= 0);
1899 for (i = 0; i < anfdmax; ++i) 3222 for (i = 0; i < anfdmax; ++i)
3223 {
3224 int j = 0;
3225
1900 for (w = anfds [i].head; w; w = w->next) 3226 for (w = w2 = anfds [i].head; w; w = w->next)
1901 { 3227 {
1902 verify_watcher (EV_A_ (W)w); 3228 verify_watcher (EV_A_ (W)w);
3229
3230 if (j++ & 1)
3231 {
3232 assert (("libev: io watcher list contains a loop", w != w2));
3233 w2 = w2->next;
3234 }
3235
1903 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3236 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1904 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3237 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1905 } 3238 }
3239 }
1906 3240
1907 assert (timermax >= timercnt); 3241 assert (timermax >= timercnt);
1908 verify_heap (EV_A_ timers, timercnt); 3242 verify_heap (EV_A_ timers, timercnt);
1909 3243
1910#if EV_PERIODIC_ENABLE 3244#if EV_PERIODIC_ENABLE
… …
1925#if EV_FORK_ENABLE 3259#if EV_FORK_ENABLE
1926 assert (forkmax >= forkcnt); 3260 assert (forkmax >= forkcnt);
1927 array_verify (EV_A_ (W *)forks, forkcnt); 3261 array_verify (EV_A_ (W *)forks, forkcnt);
1928#endif 3262#endif
1929 3263
3264#if EV_CLEANUP_ENABLE
3265 assert (cleanupmax >= cleanupcnt);
3266 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3267#endif
3268
1930#if EV_ASYNC_ENABLE 3269#if EV_ASYNC_ENABLE
1931 assert (asyncmax >= asynccnt); 3270 assert (asyncmax >= asynccnt);
1932 array_verify (EV_A_ (W *)asyncs, asynccnt); 3271 array_verify (EV_A_ (W *)asyncs, asynccnt);
1933#endif 3272#endif
1934 3273
… …
1951#endif 3290#endif
1952} 3291}
1953#endif 3292#endif
1954 3293
1955#if EV_MULTIPLICITY 3294#if EV_MULTIPLICITY
3295ecb_cold
1956struct ev_loop * 3296struct ev_loop *
1957ev_default_loop_init (unsigned int flags)
1958#else 3297#else
1959int 3298int
3299#endif
1960ev_default_loop (unsigned int flags) 3300ev_default_loop (unsigned int flags) EV_NOEXCEPT
1961#endif
1962{ 3301{
1963 if (!ev_default_loop_ptr) 3302 if (!ev_default_loop_ptr)
1964 { 3303 {
1965#if EV_MULTIPLICITY 3304#if EV_MULTIPLICITY
1966 EV_P = ev_default_loop_ptr = &default_loop_struct; 3305 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1985 3324
1986 return ev_default_loop_ptr; 3325 return ev_default_loop_ptr;
1987} 3326}
1988 3327
1989void 3328void
1990ev_default_destroy (void) 3329ev_loop_fork (EV_P) EV_NOEXCEPT
1991{ 3330{
1992#if EV_MULTIPLICITY 3331 postfork = 1;
1993 EV_P = ev_default_loop_ptr;
1994#endif
1995
1996 ev_default_loop_ptr = 0;
1997
1998#if EV_CHILD_ENABLE
1999 ev_ref (EV_A); /* child watcher */
2000 ev_signal_stop (EV_A_ &childev);
2001#endif
2002
2003 loop_destroy (EV_A);
2004}
2005
2006void
2007ev_default_fork (void)
2008{
2009#if EV_MULTIPLICITY
2010 EV_P = ev_default_loop_ptr;
2011#endif
2012
2013 postfork = 1; /* must be in line with ev_loop_fork */
2014} 3332}
2015 3333
2016/*****************************************************************************/ 3334/*****************************************************************************/
2017 3335
2018void 3336void
… …
2020{ 3338{
2021 EV_CB_INVOKE ((W)w, revents); 3339 EV_CB_INVOKE ((W)w, revents);
2022} 3340}
2023 3341
2024unsigned int 3342unsigned int
2025ev_pending_count (EV_P) 3343ev_pending_count (EV_P) EV_NOEXCEPT
2026{ 3344{
2027 int pri; 3345 int pri;
2028 unsigned int count = 0; 3346 unsigned int count = 0;
2029 3347
2030 for (pri = NUMPRI; pri--; ) 3348 for (pri = NUMPRI; pri--; )
2031 count += pendingcnt [pri]; 3349 count += pendingcnt [pri];
2032 3350
2033 return count; 3351 return count;
2034} 3352}
2035 3353
2036void noinline 3354noinline
3355void
2037ev_invoke_pending (EV_P) 3356ev_invoke_pending (EV_P)
2038{ 3357{
2039 int pri; 3358 pendingpri = NUMPRI;
2040 3359
2041 for (pri = NUMPRI; pri--; ) 3360 do
3361 {
3362 --pendingpri;
3363
3364 /* pendingpri possibly gets modified in the inner loop */
2042 while (pendingcnt [pri]) 3365 while (pendingcnt [pendingpri])
2043 { 3366 {
2044 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3367 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2045 3368
2046 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2047 /* ^ this is no longer true, as pending_w could be here */
2048
2049 p->w->pending = 0; 3369 p->w->pending = 0;
2050 EV_CB_INVOKE (p->w, p->events); 3370 EV_CB_INVOKE (p->w, p->events);
2051 EV_FREQUENT_CHECK; 3371 EV_FREQUENT_CHECK;
2052 } 3372 }
3373 }
3374 while (pendingpri);
2053} 3375}
2054 3376
2055#if EV_IDLE_ENABLE 3377#if EV_IDLE_ENABLE
2056/* make idle watchers pending. this handles the "call-idle */ 3378/* make idle watchers pending. this handles the "call-idle */
2057/* only when higher priorities are idle" logic */ 3379/* only when higher priorities are idle" logic */
… …
2114 feed_reverse_done (EV_A_ EV_TIMER); 3436 feed_reverse_done (EV_A_ EV_TIMER);
2115 } 3437 }
2116} 3438}
2117 3439
2118#if EV_PERIODIC_ENABLE 3440#if EV_PERIODIC_ENABLE
3441
3442noinline
3443static void
3444periodic_recalc (EV_P_ ev_periodic *w)
3445{
3446 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3447 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3448
3449 /* the above almost always errs on the low side */
3450 while (at <= ev_rt_now)
3451 {
3452 ev_tstamp nat = at + w->interval;
3453
3454 /* when resolution fails us, we use ev_rt_now */
3455 if (expect_false (nat == at))
3456 {
3457 at = ev_rt_now;
3458 break;
3459 }
3460
3461 at = nat;
3462 }
3463
3464 ev_at (w) = at;
3465}
3466
2119/* make periodics pending */ 3467/* make periodics pending */
2120inline_size void 3468inline_size void
2121periodics_reify (EV_P) 3469periodics_reify (EV_P)
2122{ 3470{
2123 EV_FREQUENT_CHECK; 3471 EV_FREQUENT_CHECK;
2124 3472
2125 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3473 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2126 { 3474 {
2127 int feed_count = 0;
2128
2129 do 3475 do
2130 { 3476 {
2131 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3477 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2132 3478
2133 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3479 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2142 ANHE_at_cache (periodics [HEAP0]); 3488 ANHE_at_cache (periodics [HEAP0]);
2143 downheap (periodics, periodiccnt, HEAP0); 3489 downheap (periodics, periodiccnt, HEAP0);
2144 } 3490 }
2145 else if (w->interval) 3491 else if (w->interval)
2146 { 3492 {
2147 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3493 periodic_recalc (EV_A_ w);
2148 /* if next trigger time is not sufficiently in the future, put it there */
2149 /* this might happen because of floating point inexactness */
2150 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2151 {
2152 ev_at (w) += w->interval;
2153
2154 /* if interval is unreasonably low we might still have a time in the past */
2155 /* so correct this. this will make the periodic very inexact, but the user */
2156 /* has effectively asked to get triggered more often than possible */
2157 if (ev_at (w) < ev_rt_now)
2158 ev_at (w) = ev_rt_now;
2159 }
2160
2161 ANHE_at_cache (periodics [HEAP0]); 3494 ANHE_at_cache (periodics [HEAP0]);
2162 downheap (periodics, periodiccnt, HEAP0); 3495 downheap (periodics, periodiccnt, HEAP0);
2163 } 3496 }
2164 else 3497 else
2165 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3498 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2173 } 3506 }
2174} 3507}
2175 3508
2176/* simply recalculate all periodics */ 3509/* simply recalculate all periodics */
2177/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3510/* TODO: maybe ensure that at least one event happens when jumping forward? */
2178static void noinline 3511noinline ecb_cold
3512static void
2179periodics_reschedule (EV_P) 3513periodics_reschedule (EV_P)
2180{ 3514{
2181 int i; 3515 int i;
2182 3516
2183 /* adjust periodics after time jump */ 3517 /* adjust periodics after time jump */
… …
2186 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3520 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2187 3521
2188 if (w->reschedule_cb) 3522 if (w->reschedule_cb)
2189 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3523 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2190 else if (w->interval) 3524 else if (w->interval)
2191 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3525 periodic_recalc (EV_A_ w);
2192 3526
2193 ANHE_at_cache (periodics [i]); 3527 ANHE_at_cache (periodics [i]);
2194 } 3528 }
2195 3529
2196 reheap (periodics, periodiccnt); 3530 reheap (periodics, periodiccnt);
2197} 3531}
2198#endif 3532#endif
2199 3533
2200/* adjust all timers by a given offset */ 3534/* adjust all timers by a given offset */
2201static void noinline 3535noinline ecb_cold
3536static void
2202timers_reschedule (EV_P_ ev_tstamp adjust) 3537timers_reschedule (EV_P_ ev_tstamp adjust)
2203{ 3538{
2204 int i; 3539 int i;
2205 3540
2206 for (i = 0; i < timercnt; ++i) 3541 for (i = 0; i < timercnt; ++i)
… …
2243 * doesn't hurt either as we only do this on time-jumps or 3578 * doesn't hurt either as we only do this on time-jumps or
2244 * in the unlikely event of having been preempted here. 3579 * in the unlikely event of having been preempted here.
2245 */ 3580 */
2246 for (i = 4; --i; ) 3581 for (i = 4; --i; )
2247 { 3582 {
3583 ev_tstamp diff;
2248 rtmn_diff = ev_rt_now - mn_now; 3584 rtmn_diff = ev_rt_now - mn_now;
2249 3585
3586 diff = odiff - rtmn_diff;
3587
2250 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3588 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2251 return; /* all is well */ 3589 return; /* all is well */
2252 3590
2253 ev_rt_now = ev_time (); 3591 ev_rt_now = ev_time ();
2254 mn_now = get_clock (); 3592 mn_now = get_clock ();
2255 now_floor = mn_now; 3593 now_floor = mn_now;
… …
2277 3615
2278 mn_now = ev_rt_now; 3616 mn_now = ev_rt_now;
2279 } 3617 }
2280} 3618}
2281 3619
2282void 3620int
2283ev_run (EV_P_ int flags) 3621ev_run (EV_P_ int flags)
2284{ 3622{
2285#if EV_FEATURE_API 3623#if EV_FEATURE_API
2286 ++loop_depth; 3624 ++loop_depth;
2287#endif 3625#endif
… …
2345 ev_tstamp prev_mn_now = mn_now; 3683 ev_tstamp prev_mn_now = mn_now;
2346 3684
2347 /* update time to cancel out callback processing overhead */ 3685 /* update time to cancel out callback processing overhead */
2348 time_update (EV_A_ 1e100); 3686 time_update (EV_A_ 1e100);
2349 3687
3688 /* from now on, we want a pipe-wake-up */
3689 pipe_write_wanted = 1;
3690
3691 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3692
2350 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3693 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2351 { 3694 {
2352 waittime = MAX_BLOCKTIME; 3695 waittime = MAX_BLOCKTIME;
2353 3696
2354 if (timercnt) 3697 if (timercnt)
2355 { 3698 {
2356 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3699 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2357 if (waittime > to) waittime = to; 3700 if (waittime > to) waittime = to;
2358 } 3701 }
2359 3702
2360#if EV_PERIODIC_ENABLE 3703#if EV_PERIODIC_ENABLE
2361 if (periodiccnt) 3704 if (periodiccnt)
2362 { 3705 {
2363 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3706 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2364 if (waittime > to) waittime = to; 3707 if (waittime > to) waittime = to;
2365 } 3708 }
2366#endif 3709#endif
2367 3710
2368 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3711 /* don't let timeouts decrease the waittime below timeout_blocktime */
2369 if (expect_false (waittime < timeout_blocktime)) 3712 if (expect_false (waittime < timeout_blocktime))
2370 waittime = timeout_blocktime; 3713 waittime = timeout_blocktime;
3714
3715 /* at this point, we NEED to wait, so we have to ensure */
3716 /* to pass a minimum nonzero value to the backend */
3717 if (expect_false (waittime < backend_mintime))
3718 waittime = backend_mintime;
2371 3719
2372 /* extra check because io_blocktime is commonly 0 */ 3720 /* extra check because io_blocktime is commonly 0 */
2373 if (expect_false (io_blocktime)) 3721 if (expect_false (io_blocktime))
2374 { 3722 {
2375 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3723 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2376 3724
2377 if (sleeptime > waittime - backend_fudge) 3725 if (sleeptime > waittime - backend_mintime)
2378 sleeptime = waittime - backend_fudge; 3726 sleeptime = waittime - backend_mintime;
2379 3727
2380 if (expect_true (sleeptime > 0.)) 3728 if (expect_true (sleeptime > 0.))
2381 { 3729 {
2382 ev_sleep (sleeptime); 3730 ev_sleep (sleeptime);
2383 waittime -= sleeptime; 3731 waittime -= sleeptime;
… …
2390#endif 3738#endif
2391 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3739 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2392 backend_poll (EV_A_ waittime); 3740 backend_poll (EV_A_ waittime);
2393 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3741 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2394 3742
3743 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3744
3745 ECB_MEMORY_FENCE_ACQUIRE;
3746 if (pipe_write_skipped)
3747 {
3748 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3749 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3750 }
3751
3752
2395 /* update ev_rt_now, do magic */ 3753 /* update ev_rt_now, do magic */
2396 time_update (EV_A_ waittime + sleeptime); 3754 time_update (EV_A_ waittime + sleeptime);
2397 } 3755 }
2398 3756
2399 /* queue pending timers and reschedule them */ 3757 /* queue pending timers and reschedule them */
… …
2425 loop_done = EVBREAK_CANCEL; 3783 loop_done = EVBREAK_CANCEL;
2426 3784
2427#if EV_FEATURE_API 3785#if EV_FEATURE_API
2428 --loop_depth; 3786 --loop_depth;
2429#endif 3787#endif
2430}
2431 3788
3789 return activecnt;
3790}
3791
2432void 3792void
2433ev_break (EV_P_ int how) 3793ev_break (EV_P_ int how) EV_NOEXCEPT
2434{ 3794{
2435 loop_done = how; 3795 loop_done = how;
2436} 3796}
2437 3797
2438void 3798void
2439ev_ref (EV_P) 3799ev_ref (EV_P) EV_NOEXCEPT
2440{ 3800{
2441 ++activecnt; 3801 ++activecnt;
2442} 3802}
2443 3803
2444void 3804void
2445ev_unref (EV_P) 3805ev_unref (EV_P) EV_NOEXCEPT
2446{ 3806{
2447 --activecnt; 3807 --activecnt;
2448} 3808}
2449 3809
2450void 3810void
2451ev_now_update (EV_P) 3811ev_now_update (EV_P) EV_NOEXCEPT
2452{ 3812{
2453 time_update (EV_A_ 1e100); 3813 time_update (EV_A_ 1e100);
2454} 3814}
2455 3815
2456void 3816void
2457ev_suspend (EV_P) 3817ev_suspend (EV_P) EV_NOEXCEPT
2458{ 3818{
2459 ev_now_update (EV_A); 3819 ev_now_update (EV_A);
2460} 3820}
2461 3821
2462void 3822void
2463ev_resume (EV_P) 3823ev_resume (EV_P) EV_NOEXCEPT
2464{ 3824{
2465 ev_tstamp mn_prev = mn_now; 3825 ev_tstamp mn_prev = mn_now;
2466 3826
2467 ev_now_update (EV_A); 3827 ev_now_update (EV_A);
2468 timers_reschedule (EV_A_ mn_now - mn_prev); 3828 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2507 w->pending = 0; 3867 w->pending = 0;
2508 } 3868 }
2509} 3869}
2510 3870
2511int 3871int
2512ev_clear_pending (EV_P_ void *w) 3872ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2513{ 3873{
2514 W w_ = (W)w; 3874 W w_ = (W)w;
2515 int pending = w_->pending; 3875 int pending = w_->pending;
2516 3876
2517 if (expect_true (pending)) 3877 if (expect_true (pending))
… …
2549 w->active = 0; 3909 w->active = 0;
2550} 3910}
2551 3911
2552/*****************************************************************************/ 3912/*****************************************************************************/
2553 3913
2554void noinline 3914noinline
3915void
2555ev_io_start (EV_P_ ev_io *w) 3916ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2556{ 3917{
2557 int fd = w->fd; 3918 int fd = w->fd;
2558 3919
2559 if (expect_false (ev_is_active (w))) 3920 if (expect_false (ev_is_active (w)))
2560 return; 3921 return;
… …
2563 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 3924 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2564 3925
2565 EV_FREQUENT_CHECK; 3926 EV_FREQUENT_CHECK;
2566 3927
2567 ev_start (EV_A_ (W)w, 1); 3928 ev_start (EV_A_ (W)w, 1);
2568 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3929 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
2569 wlist_add (&anfds[fd].head, (WL)w); 3930 wlist_add (&anfds[fd].head, (WL)w);
3931
3932 /* common bug, apparently */
3933 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
2570 3934
2571 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3935 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2572 w->events &= ~EV__IOFDSET; 3936 w->events &= ~EV__IOFDSET;
2573 3937
2574 EV_FREQUENT_CHECK; 3938 EV_FREQUENT_CHECK;
2575} 3939}
2576 3940
2577void noinline 3941noinline
3942void
2578ev_io_stop (EV_P_ ev_io *w) 3943ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2579{ 3944{
2580 clear_pending (EV_A_ (W)w); 3945 clear_pending (EV_A_ (W)w);
2581 if (expect_false (!ev_is_active (w))) 3946 if (expect_false (!ev_is_active (w)))
2582 return; 3947 return;
2583 3948
… …
2591 fd_change (EV_A_ w->fd, EV_ANFD_REIFY); 3956 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2592 3957
2593 EV_FREQUENT_CHECK; 3958 EV_FREQUENT_CHECK;
2594} 3959}
2595 3960
2596void noinline 3961noinline
3962void
2597ev_timer_start (EV_P_ ev_timer *w) 3963ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2598{ 3964{
2599 if (expect_false (ev_is_active (w))) 3965 if (expect_false (ev_is_active (w)))
2600 return; 3966 return;
2601 3967
2602 ev_at (w) += mn_now; 3968 ev_at (w) += mn_now;
… …
2605 3971
2606 EV_FREQUENT_CHECK; 3972 EV_FREQUENT_CHECK;
2607 3973
2608 ++timercnt; 3974 ++timercnt;
2609 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 3975 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2610 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 3976 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
2611 ANHE_w (timers [ev_active (w)]) = (WT)w; 3977 ANHE_w (timers [ev_active (w)]) = (WT)w;
2612 ANHE_at_cache (timers [ev_active (w)]); 3978 ANHE_at_cache (timers [ev_active (w)]);
2613 upheap (timers, ev_active (w)); 3979 upheap (timers, ev_active (w));
2614 3980
2615 EV_FREQUENT_CHECK; 3981 EV_FREQUENT_CHECK;
2616 3982
2617 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3983 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2618} 3984}
2619 3985
2620void noinline 3986noinline
3987void
2621ev_timer_stop (EV_P_ ev_timer *w) 3988ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2622{ 3989{
2623 clear_pending (EV_A_ (W)w); 3990 clear_pending (EV_A_ (W)w);
2624 if (expect_false (!ev_is_active (w))) 3991 if (expect_false (!ev_is_active (w)))
2625 return; 3992 return;
2626 3993
… …
2645 ev_stop (EV_A_ (W)w); 4012 ev_stop (EV_A_ (W)w);
2646 4013
2647 EV_FREQUENT_CHECK; 4014 EV_FREQUENT_CHECK;
2648} 4015}
2649 4016
2650void noinline 4017noinline
4018void
2651ev_timer_again (EV_P_ ev_timer *w) 4019ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2652{ 4020{
2653 EV_FREQUENT_CHECK; 4021 EV_FREQUENT_CHECK;
4022
4023 clear_pending (EV_A_ (W)w);
2654 4024
2655 if (ev_is_active (w)) 4025 if (ev_is_active (w))
2656 { 4026 {
2657 if (w->repeat) 4027 if (w->repeat)
2658 { 4028 {
… …
2671 4041
2672 EV_FREQUENT_CHECK; 4042 EV_FREQUENT_CHECK;
2673} 4043}
2674 4044
2675ev_tstamp 4045ev_tstamp
2676ev_timer_remaining (EV_P_ ev_timer *w) 4046ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
2677{ 4047{
2678 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 4048 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2679} 4049}
2680 4050
2681#if EV_PERIODIC_ENABLE 4051#if EV_PERIODIC_ENABLE
2682void noinline 4052noinline
4053void
2683ev_periodic_start (EV_P_ ev_periodic *w) 4054ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2684{ 4055{
2685 if (expect_false (ev_is_active (w))) 4056 if (expect_false (ev_is_active (w)))
2686 return; 4057 return;
2687 4058
2688 if (w->reschedule_cb) 4059 if (w->reschedule_cb)
2689 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4060 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2690 else if (w->interval) 4061 else if (w->interval)
2691 { 4062 {
2692 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 4063 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2693 /* this formula differs from the one in periodic_reify because we do not always round up */ 4064 periodic_recalc (EV_A_ w);
2694 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2695 } 4065 }
2696 else 4066 else
2697 ev_at (w) = w->offset; 4067 ev_at (w) = w->offset;
2698 4068
2699 EV_FREQUENT_CHECK; 4069 EV_FREQUENT_CHECK;
2700 4070
2701 ++periodiccnt; 4071 ++periodiccnt;
2702 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); 4072 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2703 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 4073 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
2704 ANHE_w (periodics [ev_active (w)]) = (WT)w; 4074 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2705 ANHE_at_cache (periodics [ev_active (w)]); 4075 ANHE_at_cache (periodics [ev_active (w)]);
2706 upheap (periodics, ev_active (w)); 4076 upheap (periodics, ev_active (w));
2707 4077
2708 EV_FREQUENT_CHECK; 4078 EV_FREQUENT_CHECK;
2709 4079
2710 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4080 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2711} 4081}
2712 4082
2713void noinline 4083noinline
4084void
2714ev_periodic_stop (EV_P_ ev_periodic *w) 4085ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2715{ 4086{
2716 clear_pending (EV_A_ (W)w); 4087 clear_pending (EV_A_ (W)w);
2717 if (expect_false (!ev_is_active (w))) 4088 if (expect_false (!ev_is_active (w)))
2718 return; 4089 return;
2719 4090
… …
2736 ev_stop (EV_A_ (W)w); 4107 ev_stop (EV_A_ (W)w);
2737 4108
2738 EV_FREQUENT_CHECK; 4109 EV_FREQUENT_CHECK;
2739} 4110}
2740 4111
2741void noinline 4112noinline
4113void
2742ev_periodic_again (EV_P_ ev_periodic *w) 4114ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2743{ 4115{
2744 /* TODO: use adjustheap and recalculation */ 4116 /* TODO: use adjustheap and recalculation */
2745 ev_periodic_stop (EV_A_ w); 4117 ev_periodic_stop (EV_A_ w);
2746 ev_periodic_start (EV_A_ w); 4118 ev_periodic_start (EV_A_ w);
2747} 4119}
… …
2751# define SA_RESTART 0 4123# define SA_RESTART 0
2752#endif 4124#endif
2753 4125
2754#if EV_SIGNAL_ENABLE 4126#if EV_SIGNAL_ENABLE
2755 4127
2756void noinline 4128noinline
4129void
2757ev_signal_start (EV_P_ ev_signal *w) 4130ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2758{ 4131{
2759 if (expect_false (ev_is_active (w))) 4132 if (expect_false (ev_is_active (w)))
2760 return; 4133 return;
2761 4134
2762 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 4135 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2764#if EV_MULTIPLICITY 4137#if EV_MULTIPLICITY
2765 assert (("libev: a signal must not be attached to two different loops", 4138 assert (("libev: a signal must not be attached to two different loops",
2766 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4139 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2767 4140
2768 signals [w->signum - 1].loop = EV_A; 4141 signals [w->signum - 1].loop = EV_A;
4142 ECB_MEMORY_FENCE_RELEASE;
2769#endif 4143#endif
2770 4144
2771 EV_FREQUENT_CHECK; 4145 EV_FREQUENT_CHECK;
2772 4146
2773#if EV_USE_SIGNALFD 4147#if EV_USE_SIGNALFD
… …
2820 sa.sa_handler = ev_sighandler; 4194 sa.sa_handler = ev_sighandler;
2821 sigfillset (&sa.sa_mask); 4195 sigfillset (&sa.sa_mask);
2822 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4196 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2823 sigaction (w->signum, &sa, 0); 4197 sigaction (w->signum, &sa, 0);
2824 4198
4199 if (origflags & EVFLAG_NOSIGMASK)
4200 {
2825 sigemptyset (&sa.sa_mask); 4201 sigemptyset (&sa.sa_mask);
2826 sigaddset (&sa.sa_mask, w->signum); 4202 sigaddset (&sa.sa_mask, w->signum);
2827 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 4203 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4204 }
2828#endif 4205#endif
2829 } 4206 }
2830 4207
2831 EV_FREQUENT_CHECK; 4208 EV_FREQUENT_CHECK;
2832} 4209}
2833 4210
2834void noinline 4211noinline
4212void
2835ev_signal_stop (EV_P_ ev_signal *w) 4213ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
2836{ 4214{
2837 clear_pending (EV_A_ (W)w); 4215 clear_pending (EV_A_ (W)w);
2838 if (expect_false (!ev_is_active (w))) 4216 if (expect_false (!ev_is_active (w)))
2839 return; 4217 return;
2840 4218
… …
2871#endif 4249#endif
2872 4250
2873#if EV_CHILD_ENABLE 4251#if EV_CHILD_ENABLE
2874 4252
2875void 4253void
2876ev_child_start (EV_P_ ev_child *w) 4254ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
2877{ 4255{
2878#if EV_MULTIPLICITY 4256#if EV_MULTIPLICITY
2879 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4257 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2880#endif 4258#endif
2881 if (expect_false (ev_is_active (w))) 4259 if (expect_false (ev_is_active (w)))
… …
2888 4266
2889 EV_FREQUENT_CHECK; 4267 EV_FREQUENT_CHECK;
2890} 4268}
2891 4269
2892void 4270void
2893ev_child_stop (EV_P_ ev_child *w) 4271ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
2894{ 4272{
2895 clear_pending (EV_A_ (W)w); 4273 clear_pending (EV_A_ (W)w);
2896 if (expect_false (!ev_is_active (w))) 4274 if (expect_false (!ev_is_active (w)))
2897 return; 4275 return;
2898 4276
… …
2915 4293
2916#define DEF_STAT_INTERVAL 5.0074891 4294#define DEF_STAT_INTERVAL 5.0074891
2917#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4295#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2918#define MIN_STAT_INTERVAL 0.1074891 4296#define MIN_STAT_INTERVAL 0.1074891
2919 4297
2920static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4298noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2921 4299
2922#if EV_USE_INOTIFY 4300#if EV_USE_INOTIFY
2923 4301
2924/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ 4302/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2925# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4303# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2926 4304
2927static void noinline 4305noinline
4306static void
2928infy_add (EV_P_ ev_stat *w) 4307infy_add (EV_P_ ev_stat *w)
2929{ 4308{
2930 w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD); 4309 w->wd = inotify_add_watch (fs_fd, w->path,
4310 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4311 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4312 | IN_DONT_FOLLOW | IN_MASK_ADD);
2931 4313
2932 if (w->wd >= 0) 4314 if (w->wd >= 0)
2933 { 4315 {
2934 struct statfs sfs; 4316 struct statfs sfs;
2935 4317
… …
2939 4321
2940 if (!fs_2625) 4322 if (!fs_2625)
2941 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4323 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2942 else if (!statfs (w->path, &sfs) 4324 else if (!statfs (w->path, &sfs)
2943 && (sfs.f_type == 0x1373 /* devfs */ 4325 && (sfs.f_type == 0x1373 /* devfs */
4326 || sfs.f_type == 0x4006 /* fat */
4327 || sfs.f_type == 0x4d44 /* msdos */
2944 || sfs.f_type == 0xEF53 /* ext2/3 */ 4328 || sfs.f_type == 0xEF53 /* ext2/3 */
4329 || sfs.f_type == 0x72b6 /* jffs2 */
4330 || sfs.f_type == 0x858458f6 /* ramfs */
4331 || sfs.f_type == 0x5346544e /* ntfs */
2945 || sfs.f_type == 0x3153464a /* jfs */ 4332 || sfs.f_type == 0x3153464a /* jfs */
4333 || sfs.f_type == 0x9123683e /* btrfs */
2946 || sfs.f_type == 0x52654973 /* reiser3 */ 4334 || sfs.f_type == 0x52654973 /* reiser3 */
2947 || sfs.f_type == 0x01021994 /* tempfs */ 4335 || sfs.f_type == 0x01021994 /* tmpfs */
2948 || sfs.f_type == 0x58465342 /* xfs */)) 4336 || sfs.f_type == 0x58465342 /* xfs */))
2949 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4337 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2950 else 4338 else
2951 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4339 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2952 } 4340 }
… …
2973 if (!pend || pend == path) 4361 if (!pend || pend == path)
2974 break; 4362 break;
2975 4363
2976 *pend = 0; 4364 *pend = 0;
2977 w->wd = inotify_add_watch (fs_fd, path, mask); 4365 w->wd = inotify_add_watch (fs_fd, path, mask);
2978 } 4366 }
2979 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4367 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2980 } 4368 }
2981 } 4369 }
2982 4370
2983 if (w->wd >= 0) 4371 if (w->wd >= 0)
… …
2987 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4375 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2988 ev_timer_again (EV_A_ &w->timer); 4376 ev_timer_again (EV_A_ &w->timer);
2989 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4377 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2990} 4378}
2991 4379
2992static void noinline 4380noinline
4381static void
2993infy_del (EV_P_ ev_stat *w) 4382infy_del (EV_P_ ev_stat *w)
2994{ 4383{
2995 int slot; 4384 int slot;
2996 int wd = w->wd; 4385 int wd = w->wd;
2997 4386
… …
3004 4393
3005 /* remove this watcher, if others are watching it, they will rearm */ 4394 /* remove this watcher, if others are watching it, they will rearm */
3006 inotify_rm_watch (fs_fd, wd); 4395 inotify_rm_watch (fs_fd, wd);
3007} 4396}
3008 4397
3009static void noinline 4398noinline
4399static void
3010infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4400infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3011{ 4401{
3012 if (slot < 0) 4402 if (slot < 0)
3013 /* overflow, need to check for all hash slots */ 4403 /* overflow, need to check for all hash slots */
3014 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) 4404 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
… …
3050 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4440 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3051 ofs += sizeof (struct inotify_event) + ev->len; 4441 ofs += sizeof (struct inotify_event) + ev->len;
3052 } 4442 }
3053} 4443}
3054 4444
3055inline_size unsigned int
3056ev_linux_version (void)
3057{
3058 struct utsname buf;
3059 unsigned int v;
3060 int i;
3061 char *p = buf.release;
3062
3063 if (uname (&buf))
3064 return 0;
3065
3066 for (i = 3+1; --i; )
3067 {
3068 unsigned int c = 0;
3069
3070 for (;;)
3071 {
3072 if (*p >= '0' && *p <= '9')
3073 c = c * 10 + *p++ - '0';
3074 else
3075 {
3076 p += *p == '.';
3077 break;
3078 }
3079 }
3080
3081 v = (v << 8) | c;
3082 }
3083
3084 return v;
3085}
3086
3087inline_size void 4445inline_size ecb_cold
4446void
3088ev_check_2625 (EV_P) 4447ev_check_2625 (EV_P)
3089{ 4448{
3090 /* kernels < 2.6.25 are borked 4449 /* kernels < 2.6.25 are borked
3091 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4450 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3092 */ 4451 */
… …
3097} 4456}
3098 4457
3099inline_size int 4458inline_size int
3100infy_newfd (void) 4459infy_newfd (void)
3101{ 4460{
3102#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4461#if defined IN_CLOEXEC && defined IN_NONBLOCK
3103 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4462 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3104 if (fd >= 0) 4463 if (fd >= 0)
3105 return fd; 4464 return fd;
3106#endif 4465#endif
3107 return inotify_init (); 4466 return inotify_init ();
… …
3182#else 4541#else
3183# define EV_LSTAT(p,b) lstat (p, b) 4542# define EV_LSTAT(p,b) lstat (p, b)
3184#endif 4543#endif
3185 4544
3186void 4545void
3187ev_stat_stat (EV_P_ ev_stat *w) 4546ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
3188{ 4547{
3189 if (lstat (w->path, &w->attr) < 0) 4548 if (lstat (w->path, &w->attr) < 0)
3190 w->attr.st_nlink = 0; 4549 w->attr.st_nlink = 0;
3191 else if (!w->attr.st_nlink) 4550 else if (!w->attr.st_nlink)
3192 w->attr.st_nlink = 1; 4551 w->attr.st_nlink = 1;
3193} 4552}
3194 4553
3195static void noinline 4554noinline
4555static void
3196stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4556stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3197{ 4557{
3198 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4558 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3199 4559
3200 ev_statdata prev = w->attr; 4560 ev_statdata prev = w->attr;
… …
3231 ev_feed_event (EV_A_ w, EV_STAT); 4591 ev_feed_event (EV_A_ w, EV_STAT);
3232 } 4592 }
3233} 4593}
3234 4594
3235void 4595void
3236ev_stat_start (EV_P_ ev_stat *w) 4596ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
3237{ 4597{
3238 if (expect_false (ev_is_active (w))) 4598 if (expect_false (ev_is_active (w)))
3239 return; 4599 return;
3240 4600
3241 ev_stat_stat (EV_A_ w); 4601 ev_stat_stat (EV_A_ w);
… …
3262 4622
3263 EV_FREQUENT_CHECK; 4623 EV_FREQUENT_CHECK;
3264} 4624}
3265 4625
3266void 4626void
3267ev_stat_stop (EV_P_ ev_stat *w) 4627ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
3268{ 4628{
3269 clear_pending (EV_A_ (W)w); 4629 clear_pending (EV_A_ (W)w);
3270 if (expect_false (!ev_is_active (w))) 4630 if (expect_false (!ev_is_active (w)))
3271 return; 4631 return;
3272 4632
… …
3288} 4648}
3289#endif 4649#endif
3290 4650
3291#if EV_IDLE_ENABLE 4651#if EV_IDLE_ENABLE
3292void 4652void
3293ev_idle_start (EV_P_ ev_idle *w) 4653ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
3294{ 4654{
3295 if (expect_false (ev_is_active (w))) 4655 if (expect_false (ev_is_active (w)))
3296 return; 4656 return;
3297 4657
3298 pri_adjust (EV_A_ (W)w); 4658 pri_adjust (EV_A_ (W)w);
… …
3303 int active = ++idlecnt [ABSPRI (w)]; 4663 int active = ++idlecnt [ABSPRI (w)];
3304 4664
3305 ++idleall; 4665 ++idleall;
3306 ev_start (EV_A_ (W)w, active); 4666 ev_start (EV_A_ (W)w, active);
3307 4667
3308 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4668 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
3309 idles [ABSPRI (w)][active - 1] = w; 4669 idles [ABSPRI (w)][active - 1] = w;
3310 } 4670 }
3311 4671
3312 EV_FREQUENT_CHECK; 4672 EV_FREQUENT_CHECK;
3313} 4673}
3314 4674
3315void 4675void
3316ev_idle_stop (EV_P_ ev_idle *w) 4676ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
3317{ 4677{
3318 clear_pending (EV_A_ (W)w); 4678 clear_pending (EV_A_ (W)w);
3319 if (expect_false (!ev_is_active (w))) 4679 if (expect_false (!ev_is_active (w)))
3320 return; 4680 return;
3321 4681
… …
3335} 4695}
3336#endif 4696#endif
3337 4697
3338#if EV_PREPARE_ENABLE 4698#if EV_PREPARE_ENABLE
3339void 4699void
3340ev_prepare_start (EV_P_ ev_prepare *w) 4700ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3341{ 4701{
3342 if (expect_false (ev_is_active (w))) 4702 if (expect_false (ev_is_active (w)))
3343 return; 4703 return;
3344 4704
3345 EV_FREQUENT_CHECK; 4705 EV_FREQUENT_CHECK;
3346 4706
3347 ev_start (EV_A_ (W)w, ++preparecnt); 4707 ev_start (EV_A_ (W)w, ++preparecnt);
3348 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4708 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
3349 prepares [preparecnt - 1] = w; 4709 prepares [preparecnt - 1] = w;
3350 4710
3351 EV_FREQUENT_CHECK; 4711 EV_FREQUENT_CHECK;
3352} 4712}
3353 4713
3354void 4714void
3355ev_prepare_stop (EV_P_ ev_prepare *w) 4715ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3356{ 4716{
3357 clear_pending (EV_A_ (W)w); 4717 clear_pending (EV_A_ (W)w);
3358 if (expect_false (!ev_is_active (w))) 4718 if (expect_false (!ev_is_active (w)))
3359 return; 4719 return;
3360 4720
… …
3373} 4733}
3374#endif 4734#endif
3375 4735
3376#if EV_CHECK_ENABLE 4736#if EV_CHECK_ENABLE
3377void 4737void
3378ev_check_start (EV_P_ ev_check *w) 4738ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3379{ 4739{
3380 if (expect_false (ev_is_active (w))) 4740 if (expect_false (ev_is_active (w)))
3381 return; 4741 return;
3382 4742
3383 EV_FREQUENT_CHECK; 4743 EV_FREQUENT_CHECK;
3384 4744
3385 ev_start (EV_A_ (W)w, ++checkcnt); 4745 ev_start (EV_A_ (W)w, ++checkcnt);
3386 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4746 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
3387 checks [checkcnt - 1] = w; 4747 checks [checkcnt - 1] = w;
3388 4748
3389 EV_FREQUENT_CHECK; 4749 EV_FREQUENT_CHECK;
3390} 4750}
3391 4751
3392void 4752void
3393ev_check_stop (EV_P_ ev_check *w) 4753ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3394{ 4754{
3395 clear_pending (EV_A_ (W)w); 4755 clear_pending (EV_A_ (W)w);
3396 if (expect_false (!ev_is_active (w))) 4756 if (expect_false (!ev_is_active (w)))
3397 return; 4757 return;
3398 4758
… …
3410 EV_FREQUENT_CHECK; 4770 EV_FREQUENT_CHECK;
3411} 4771}
3412#endif 4772#endif
3413 4773
3414#if EV_EMBED_ENABLE 4774#if EV_EMBED_ENABLE
3415void noinline 4775noinline
4776void
3416ev_embed_sweep (EV_P_ ev_embed *w) 4777ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3417{ 4778{
3418 ev_run (w->other, EVRUN_NOWAIT); 4779 ev_run (w->other, EVRUN_NOWAIT);
3419} 4780}
3420 4781
3421static void 4782static void
… …
3469 ev_idle_stop (EV_A_ idle); 4830 ev_idle_stop (EV_A_ idle);
3470} 4831}
3471#endif 4832#endif
3472 4833
3473void 4834void
3474ev_embed_start (EV_P_ ev_embed *w) 4835ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
3475{ 4836{
3476 if (expect_false (ev_is_active (w))) 4837 if (expect_false (ev_is_active (w)))
3477 return; 4838 return;
3478 4839
3479 { 4840 {
… …
3500 4861
3501 EV_FREQUENT_CHECK; 4862 EV_FREQUENT_CHECK;
3502} 4863}
3503 4864
3504void 4865void
3505ev_embed_stop (EV_P_ ev_embed *w) 4866ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3506{ 4867{
3507 clear_pending (EV_A_ (W)w); 4868 clear_pending (EV_A_ (W)w);
3508 if (expect_false (!ev_is_active (w))) 4869 if (expect_false (!ev_is_active (w)))
3509 return; 4870 return;
3510 4871
… …
3520} 4881}
3521#endif 4882#endif
3522 4883
3523#if EV_FORK_ENABLE 4884#if EV_FORK_ENABLE
3524void 4885void
3525ev_fork_start (EV_P_ ev_fork *w) 4886ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3526{ 4887{
3527 if (expect_false (ev_is_active (w))) 4888 if (expect_false (ev_is_active (w)))
3528 return; 4889 return;
3529 4890
3530 EV_FREQUENT_CHECK; 4891 EV_FREQUENT_CHECK;
3531 4892
3532 ev_start (EV_A_ (W)w, ++forkcnt); 4893 ev_start (EV_A_ (W)w, ++forkcnt);
3533 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4894 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
3534 forks [forkcnt - 1] = w; 4895 forks [forkcnt - 1] = w;
3535 4896
3536 EV_FREQUENT_CHECK; 4897 EV_FREQUENT_CHECK;
3537} 4898}
3538 4899
3539void 4900void
3540ev_fork_stop (EV_P_ ev_fork *w) 4901ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3541{ 4902{
3542 clear_pending (EV_A_ (W)w); 4903 clear_pending (EV_A_ (W)w);
3543 if (expect_false (!ev_is_active (w))) 4904 if (expect_false (!ev_is_active (w)))
3544 return; 4905 return;
3545 4906
… …
3556 4917
3557 EV_FREQUENT_CHECK; 4918 EV_FREQUENT_CHECK;
3558} 4919}
3559#endif 4920#endif
3560 4921
3561#if EV_ASYNC_ENABLE 4922#if EV_CLEANUP_ENABLE
3562void 4923void
3563ev_async_start (EV_P_ ev_async *w) 4924ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3564{ 4925{
3565 if (expect_false (ev_is_active (w))) 4926 if (expect_false (ev_is_active (w)))
3566 return; 4927 return;
3567 4928
3568 w->sent = 0;
3569
3570 evpipe_init (EV_A);
3571
3572 EV_FREQUENT_CHECK; 4929 EV_FREQUENT_CHECK;
3573 4930
3574 ev_start (EV_A_ (W)w, ++asynccnt); 4931 ev_start (EV_A_ (W)w, ++cleanupcnt);
3575 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 4932 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
3576 asyncs [asynccnt - 1] = w; 4933 cleanups [cleanupcnt - 1] = w;
3577 4934
4935 /* cleanup watchers should never keep a refcount on the loop */
4936 ev_unref (EV_A);
3578 EV_FREQUENT_CHECK; 4937 EV_FREQUENT_CHECK;
3579} 4938}
3580 4939
3581void 4940void
3582ev_async_stop (EV_P_ ev_async *w) 4941ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3583{ 4942{
3584 clear_pending (EV_A_ (W)w); 4943 clear_pending (EV_A_ (W)w);
3585 if (expect_false (!ev_is_active (w))) 4944 if (expect_false (!ev_is_active (w)))
3586 return; 4945 return;
3587 4946
3588 EV_FREQUENT_CHECK; 4947 EV_FREQUENT_CHECK;
4948 ev_ref (EV_A);
4949
4950 {
4951 int active = ev_active (w);
4952
4953 cleanups [active - 1] = cleanups [--cleanupcnt];
4954 ev_active (cleanups [active - 1]) = active;
4955 }
4956
4957 ev_stop (EV_A_ (W)w);
4958
4959 EV_FREQUENT_CHECK;
4960}
4961#endif
4962
4963#if EV_ASYNC_ENABLE
4964void
4965ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
4966{
4967 if (expect_false (ev_is_active (w)))
4968 return;
4969
4970 w->sent = 0;
4971
4972 evpipe_init (EV_A);
4973
4974 EV_FREQUENT_CHECK;
4975
4976 ev_start (EV_A_ (W)w, ++asynccnt);
4977 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
4978 asyncs [asynccnt - 1] = w;
4979
4980 EV_FREQUENT_CHECK;
4981}
4982
4983void
4984ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
4985{
4986 clear_pending (EV_A_ (W)w);
4987 if (expect_false (!ev_is_active (w)))
4988 return;
4989
4990 EV_FREQUENT_CHECK;
3589 4991
3590 { 4992 {
3591 int active = ev_active (w); 4993 int active = ev_active (w);
3592 4994
3593 asyncs [active - 1] = asyncs [--asynccnt]; 4995 asyncs [active - 1] = asyncs [--asynccnt];
… …
3598 5000
3599 EV_FREQUENT_CHECK; 5001 EV_FREQUENT_CHECK;
3600} 5002}
3601 5003
3602void 5004void
3603ev_async_send (EV_P_ ev_async *w) 5005ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3604{ 5006{
3605 w->sent = 1; 5007 w->sent = 1;
3606 evpipe_write (EV_A_ &async_pending); 5008 evpipe_write (EV_A_ &async_pending);
3607} 5009}
3608#endif 5010#endif
… …
3645 5047
3646 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 5048 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3647} 5049}
3648 5050
3649void 5051void
3650ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5052ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
3651{ 5053{
3652 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5054 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3653
3654 if (expect_false (!once))
3655 {
3656 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3657 return;
3658 }
3659 5055
3660 once->cb = cb; 5056 once->cb = cb;
3661 once->arg = arg; 5057 once->arg = arg;
3662 5058
3663 ev_init (&once->io, once_cb_io); 5059 ev_init (&once->io, once_cb_io);
… …
3676} 5072}
3677 5073
3678/*****************************************************************************/ 5074/*****************************************************************************/
3679 5075
3680#if EV_WALK_ENABLE 5076#if EV_WALK_ENABLE
5077ecb_cold
3681void 5078void
3682ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 5079ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
3683{ 5080{
3684 int i, j; 5081 int i, j;
3685 ev_watcher_list *wl, *wn; 5082 ev_watcher_list *wl, *wn;
3686 5083
3687 if (types & (EV_IO | EV_EMBED)) 5084 if (types & (EV_IO | EV_EMBED))
… …
3730 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5127 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3731#endif 5128#endif
3732 5129
3733#if EV_IDLE_ENABLE 5130#if EV_IDLE_ENABLE
3734 if (types & EV_IDLE) 5131 if (types & EV_IDLE)
3735 for (j = NUMPRI; i--; ) 5132 for (j = NUMPRI; j--; )
3736 for (i = idlecnt [j]; i--; ) 5133 for (i = idlecnt [j]; i--; )
3737 cb (EV_A_ EV_IDLE, idles [j][i]); 5134 cb (EV_A_ EV_IDLE, idles [j][i]);
3738#endif 5135#endif
3739 5136
3740#if EV_FORK_ENABLE 5137#if EV_FORK_ENABLE
… …
3793 5190
3794#if EV_MULTIPLICITY 5191#if EV_MULTIPLICITY
3795 #include "ev_wrap.h" 5192 #include "ev_wrap.h"
3796#endif 5193#endif
3797 5194
3798EV_CPP(})
3799

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines