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Comparing libev/ev.c (file contents):
Revision 1.354 by root, Fri Oct 22 09:24:11 2010 UTC vs.
Revision 1.497 by root, Tue Jun 25 04:52:30 2019 UTC

1/* 1/*
2 * libev event processing core, watcher management 2 * libev event processing core, watcher management
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010 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 0x00010006
565
566#ifdef _WIN32
567 typedef signed char int8_t;
568 typedef unsigned char uint8_t;
569 typedef signed short int16_t;
570 typedef unsigned short uint16_t;
571 typedef signed int int32_t;
572 typedef unsigned int uint32_t;
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 #define ECB_MEMORY_FENCE_RELAXED __asm__ __volatile__ ("" : : : "memory")
689 #if __i386 || __i386__
690 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
691 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
692 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
693 #elif ECB_GCC_AMD64
694 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
695 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
696 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
697 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
698 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
699 #elif defined __ARM_ARCH_2__ \
700 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
701 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
702 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
703 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
704 || defined __ARM_ARCH_5TEJ__
705 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
706 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
707 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
708 || defined __ARM_ARCH_6T2__
709 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
710 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
711 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
712 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
713 #elif __aarch64__
714 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
715 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
716 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
717 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
718 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
719 #elif defined __s390__ || defined __s390x__
720 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
721 #elif defined __mips__
722 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
723 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
724 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
725 #elif defined __alpha__
726 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
727 #elif defined __hppa__
728 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
729 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
730 #elif defined __ia64__
731 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
732 #elif defined __m68k__
733 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
734 #elif defined __m88k__
735 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
736 #elif defined __sh__
737 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
738 #endif
739 #endif
740#endif
741
742#ifndef ECB_MEMORY_FENCE
743 #if ECB_GCC_VERSION(4,7)
744 /* see comment below (stdatomic.h) about the C11 memory model. */
745 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
746 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
747 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
748 #define ECB_MEMORY_FENCE_RELAXED __atomic_thread_fence (__ATOMIC_RELAXED)
749
750 #elif ECB_CLANG_EXTENSION(c_atomic)
751 /* see comment below (stdatomic.h) about the C11 memory model. */
752 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
753 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
754 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
755 #define ECB_MEMORY_FENCE_RELAXED __c11_atomic_thread_fence (__ATOMIC_RELAXED)
756
757 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
758 #define ECB_MEMORY_FENCE __sync_synchronize ()
759 #elif _MSC_VER >= 1500 /* VC++ 2008 */
760 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
761 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
762 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
763 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
764 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
765 #elif _MSC_VER >= 1400 /* VC++ 2005 */
766 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
767 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
768 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
769 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
770 #elif defined _WIN32
771 #include <WinNT.h>
772 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
773 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
774 #include <mbarrier.h>
775 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
776 #define ECB_MEMORY_FENCE_ACQUIRE __machine_acq_barrier ()
777 #define ECB_MEMORY_FENCE_RELEASE __machine_rel_barrier ()
778 #define ECB_MEMORY_FENCE_RELAXED __compiler_barrier ()
779 #elif __xlC__
780 #define ECB_MEMORY_FENCE __sync ()
781 #endif
782#endif
783
784#ifndef ECB_MEMORY_FENCE
785 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
786 /* we assume that these memory fences work on all variables/all memory accesses, */
787 /* not just C11 atomics and atomic accesses */
788 #include <stdatomic.h>
789 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
790 #define ECB_MEMORY_FENCE_ACQUIRE atomic_thread_fence (memory_order_acquire)
791 #define ECB_MEMORY_FENCE_RELEASE atomic_thread_fence (memory_order_release)
792 #endif
793#endif
794
795#ifndef ECB_MEMORY_FENCE
796 #if !ECB_AVOID_PTHREADS
797 /*
798 * if you get undefined symbol references to pthread_mutex_lock,
799 * or failure to find pthread.h, then you should implement
800 * the ECB_MEMORY_FENCE operations for your cpu/compiler
801 * OR provide pthread.h and link against the posix thread library
802 * of your system.
803 */
804 #include <pthread.h>
805 #define ECB_NEEDS_PTHREADS 1
806 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
807
808 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
809 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
810 #endif
811#endif
812
813#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
814 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
815#endif
816
817#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
818 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
819#endif
820
821#if !defined ECB_MEMORY_FENCE_RELAXED && defined ECB_MEMORY_FENCE
822 #define ECB_MEMORY_FENCE_RELAXED ECB_MEMORY_FENCE /* very heavy-handed */
823#endif
824
825/*****************************************************************************/
826
827#if ECB_CPP
828 #define ecb_inline static inline
829#elif ECB_GCC_VERSION(2,5)
830 #define ecb_inline static __inline__
831#elif ECB_C99
832 #define ecb_inline static inline
833#else
834 #define ecb_inline static
835#endif
836
837#if ECB_GCC_VERSION(3,3)
838 #define ecb_restrict __restrict__
839#elif ECB_C99
840 #define ecb_restrict restrict
841#else
842 #define ecb_restrict
843#endif
844
845typedef int ecb_bool;
846
847#define ECB_CONCAT_(a, b) a ## b
848#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
849#define ECB_STRINGIFY_(a) # a
850#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
851#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
852
853#define ecb_function_ ecb_inline
854
855#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
856 #define ecb_attribute(attrlist) __attribute__ (attrlist)
857#else
858 #define ecb_attribute(attrlist)
859#endif
860
861#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
862 #define ecb_is_constant(expr) __builtin_constant_p (expr)
863#else
864 /* possible C11 impl for integral types
865 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
866 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
867
868 #define ecb_is_constant(expr) 0
869#endif
870
871#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
464# define expect(expr,value) __builtin_expect ((expr),(value)) 872 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
465# define noinline __attribute__ ((noinline))
466#else 873#else
467# define expect(expr,value) (expr) 874 #define ecb_expect(expr,value) (expr)
468# define noinline
469# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
470# define inline
471# endif 875#endif
472#endif
473 876
877#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
878 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
879#else
880 #define ecb_prefetch(addr,rw,locality)
881#endif
882
883/* no emulation for ecb_decltype */
884#if ECB_CPP11
885 // older implementations might have problems with decltype(x)::type, work around it
886 template<class T> struct ecb_decltype_t { typedef T type; };
887 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
888#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
889 #define ecb_decltype(x) __typeof__ (x)
890#endif
891
892#if _MSC_VER >= 1300
893 #define ecb_deprecated __declspec (deprecated)
894#else
895 #define ecb_deprecated ecb_attribute ((__deprecated__))
896#endif
897
898#if _MSC_VER >= 1500
899 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
900#elif ECB_GCC_VERSION(4,5)
901 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
902#else
903 #define ecb_deprecated_message(msg) ecb_deprecated
904#endif
905
906#if _MSC_VER >= 1400
907 #define ecb_noinline __declspec (noinline)
908#else
909 #define ecb_noinline ecb_attribute ((__noinline__))
910#endif
911
912#define ecb_unused ecb_attribute ((__unused__))
913#define ecb_const ecb_attribute ((__const__))
914#define ecb_pure ecb_attribute ((__pure__))
915
916#if ECB_C11 || __IBMC_NORETURN
917 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
918 #define ecb_noreturn _Noreturn
919#elif ECB_CPP11
920 #define ecb_noreturn [[noreturn]]
921#elif _MSC_VER >= 1200
922 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
923 #define ecb_noreturn __declspec (noreturn)
924#else
925 #define ecb_noreturn ecb_attribute ((__noreturn__))
926#endif
927
928#if ECB_GCC_VERSION(4,3)
929 #define ecb_artificial ecb_attribute ((__artificial__))
930 #define ecb_hot ecb_attribute ((__hot__))
931 #define ecb_cold ecb_attribute ((__cold__))
932#else
933 #define ecb_artificial
934 #define ecb_hot
935 #define ecb_cold
936#endif
937
938/* put around conditional expressions if you are very sure that the */
939/* expression is mostly true or mostly false. note that these return */
940/* booleans, not the expression. */
474#define expect_false(expr) expect ((expr) != 0, 0) 941#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
475#define expect_true(expr) expect ((expr) != 0, 1) 942#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
943/* for compatibility to the rest of the world */
944#define ecb_likely(expr) ecb_expect_true (expr)
945#define ecb_unlikely(expr) ecb_expect_false (expr)
946
947/* count trailing zero bits and count # of one bits */
948#if ECB_GCC_VERSION(3,4) \
949 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
950 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
951 && ECB_CLANG_BUILTIN(__builtin_popcount))
952 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
953 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
954 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
955 #define ecb_ctz32(x) __builtin_ctz (x)
956 #define ecb_ctz64(x) __builtin_ctzll (x)
957 #define ecb_popcount32(x) __builtin_popcount (x)
958 /* no popcountll */
959#else
960 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
961 ecb_function_ ecb_const int
962 ecb_ctz32 (uint32_t x)
963 {
964#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
965 unsigned long r;
966 _BitScanForward (&r, x);
967 return (int)r;
968#else
969 int r = 0;
970
971 x &= ~x + 1; /* this isolates the lowest bit */
972
973#if ECB_branchless_on_i386
974 r += !!(x & 0xaaaaaaaa) << 0;
975 r += !!(x & 0xcccccccc) << 1;
976 r += !!(x & 0xf0f0f0f0) << 2;
977 r += !!(x & 0xff00ff00) << 3;
978 r += !!(x & 0xffff0000) << 4;
979#else
980 if (x & 0xaaaaaaaa) r += 1;
981 if (x & 0xcccccccc) r += 2;
982 if (x & 0xf0f0f0f0) r += 4;
983 if (x & 0xff00ff00) r += 8;
984 if (x & 0xffff0000) r += 16;
985#endif
986
987 return r;
988#endif
989 }
990
991 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
992 ecb_function_ ecb_const int
993 ecb_ctz64 (uint64_t x)
994 {
995#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
996 unsigned long r;
997 _BitScanForward64 (&r, x);
998 return (int)r;
999#else
1000 int shift = x & 0xffffffff ? 0 : 32;
1001 return ecb_ctz32 (x >> shift) + shift;
1002#endif
1003 }
1004
1005 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
1006 ecb_function_ ecb_const int
1007 ecb_popcount32 (uint32_t x)
1008 {
1009 x -= (x >> 1) & 0x55555555;
1010 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
1011 x = ((x >> 4) + x) & 0x0f0f0f0f;
1012 x *= 0x01010101;
1013
1014 return x >> 24;
1015 }
1016
1017 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
1018 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
1019 {
1020#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1021 unsigned long r;
1022 _BitScanReverse (&r, x);
1023 return (int)r;
1024#else
1025 int r = 0;
1026
1027 if (x >> 16) { x >>= 16; r += 16; }
1028 if (x >> 8) { x >>= 8; r += 8; }
1029 if (x >> 4) { x >>= 4; r += 4; }
1030 if (x >> 2) { x >>= 2; r += 2; }
1031 if (x >> 1) { r += 1; }
1032
1033 return r;
1034#endif
1035 }
1036
1037 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1038 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1039 {
1040#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1041 unsigned long r;
1042 _BitScanReverse64 (&r, x);
1043 return (int)r;
1044#else
1045 int r = 0;
1046
1047 if (x >> 32) { x >>= 32; r += 32; }
1048
1049 return r + ecb_ld32 (x);
1050#endif
1051 }
1052#endif
1053
1054ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1055ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1056ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1057ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1058
1059ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1060ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1061{
1062 return ( (x * 0x0802U & 0x22110U)
1063 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1064}
1065
1066ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1067ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1068{
1069 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1070 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1071 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1072 x = ( x >> 8 ) | ( x << 8);
1073
1074 return x;
1075}
1076
1077ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1078ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1079{
1080 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1081 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1082 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1083 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1084 x = ( x >> 16 ) | ( x << 16);
1085
1086 return x;
1087}
1088
1089/* popcount64 is only available on 64 bit cpus as gcc builtin */
1090/* so for this version we are lazy */
1091ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1092ecb_function_ ecb_const int
1093ecb_popcount64 (uint64_t x)
1094{
1095 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1096}
1097
1098ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1099ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1100ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1101ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1102ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1103ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1104ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1105ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1106
1107ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1108ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1109ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1110ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1111ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1112ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1113ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1114ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1115
1116#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1117 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1118 #define ecb_bswap16(x) __builtin_bswap16 (x)
1119 #else
1120 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1121 #endif
1122 #define ecb_bswap32(x) __builtin_bswap32 (x)
1123 #define ecb_bswap64(x) __builtin_bswap64 (x)
1124#elif _MSC_VER
1125 #include <stdlib.h>
1126 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1127 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1128 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1129#else
1130 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1131 ecb_function_ ecb_const uint16_t
1132 ecb_bswap16 (uint16_t x)
1133 {
1134 return ecb_rotl16 (x, 8);
1135 }
1136
1137 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1138 ecb_function_ ecb_const uint32_t
1139 ecb_bswap32 (uint32_t x)
1140 {
1141 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1142 }
1143
1144 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1145 ecb_function_ ecb_const uint64_t
1146 ecb_bswap64 (uint64_t x)
1147 {
1148 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1149 }
1150#endif
1151
1152#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1153 #define ecb_unreachable() __builtin_unreachable ()
1154#else
1155 /* this seems to work fine, but gcc always emits a warning for it :/ */
1156 ecb_inline ecb_noreturn void ecb_unreachable (void);
1157 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1158#endif
1159
1160/* try to tell the compiler that some condition is definitely true */
1161#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1162
1163ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1164ecb_inline ecb_const uint32_t
1165ecb_byteorder_helper (void)
1166{
1167 /* the union code still generates code under pressure in gcc, */
1168 /* but less than using pointers, and always seems to */
1169 /* successfully return a constant. */
1170 /* the reason why we have this horrible preprocessor mess */
1171 /* is to avoid it in all cases, at least on common architectures */
1172 /* or when using a recent enough gcc version (>= 4.6) */
1173#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1174 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1175 #define ECB_LITTLE_ENDIAN 1
1176 return 0x44332211;
1177#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1178 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1179 #define ECB_BIG_ENDIAN 1
1180 return 0x11223344;
1181#else
1182 union
1183 {
1184 uint8_t c[4];
1185 uint32_t u;
1186 } u = { 0x11, 0x22, 0x33, 0x44 };
1187 return u.u;
1188#endif
1189}
1190
1191ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1192ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1193ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1194ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1195
1196#if ECB_GCC_VERSION(3,0) || ECB_C99
1197 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1198#else
1199 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1200#endif
1201
1202#if ECB_CPP
1203 template<typename T>
1204 static inline T ecb_div_rd (T val, T div)
1205 {
1206 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1207 }
1208 template<typename T>
1209 static inline T ecb_div_ru (T val, T div)
1210 {
1211 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1212 }
1213#else
1214 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1215 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1216#endif
1217
1218#if ecb_cplusplus_does_not_suck
1219 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1220 template<typename T, int N>
1221 static inline int ecb_array_length (const T (&arr)[N])
1222 {
1223 return N;
1224 }
1225#else
1226 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1227#endif
1228
1229ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1230ecb_function_ ecb_const uint32_t
1231ecb_binary16_to_binary32 (uint32_t x)
1232{
1233 unsigned int s = (x & 0x8000) << (31 - 15);
1234 int e = (x >> 10) & 0x001f;
1235 unsigned int m = x & 0x03ff;
1236
1237 if (ecb_expect_false (e == 31))
1238 /* infinity or NaN */
1239 e = 255 - (127 - 15);
1240 else if (ecb_expect_false (!e))
1241 {
1242 if (ecb_expect_true (!m))
1243 /* zero, handled by code below by forcing e to 0 */
1244 e = 0 - (127 - 15);
1245 else
1246 {
1247 /* subnormal, renormalise */
1248 unsigned int s = 10 - ecb_ld32 (m);
1249
1250 m = (m << s) & 0x3ff; /* mask implicit bit */
1251 e -= s - 1;
1252 }
1253 }
1254
1255 /* e and m now are normalised, or zero, (or inf or nan) */
1256 e += 127 - 15;
1257
1258 return s | (e << 23) | (m << (23 - 10));
1259}
1260
1261ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1262ecb_function_ ecb_const uint16_t
1263ecb_binary32_to_binary16 (uint32_t x)
1264{
1265 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1266 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1267 unsigned int m = x & 0x007fffff;
1268
1269 x &= 0x7fffffff;
1270
1271 /* if it's within range of binary16 normals, use fast path */
1272 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1273 {
1274 /* mantissa round-to-even */
1275 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1276
1277 /* handle overflow */
1278 if (ecb_expect_false (m >= 0x00800000))
1279 {
1280 m >>= 1;
1281 e += 1;
1282 }
1283
1284 return s | (e << 10) | (m >> (23 - 10));
1285 }
1286
1287 /* handle large numbers and infinity */
1288 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1289 return s | 0x7c00;
1290
1291 /* handle zero, subnormals and small numbers */
1292 if (ecb_expect_true (x < 0x38800000))
1293 {
1294 /* zero */
1295 if (ecb_expect_true (!x))
1296 return s;
1297
1298 /* handle subnormals */
1299
1300 /* too small, will be zero */
1301 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1302 return s;
1303
1304 m |= 0x00800000; /* make implicit bit explicit */
1305
1306 /* very tricky - we need to round to the nearest e (+10) bit value */
1307 {
1308 unsigned int bits = 14 - e;
1309 unsigned int half = (1 << (bits - 1)) - 1;
1310 unsigned int even = (m >> bits) & 1;
1311
1312 /* if this overflows, we will end up with a normalised number */
1313 m = (m + half + even) >> bits;
1314 }
1315
1316 return s | m;
1317 }
1318
1319 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1320 m >>= 13;
1321
1322 return s | 0x7c00 | m | !m;
1323}
1324
1325/*******************************************************************************/
1326/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1327
1328/* basically, everything uses "ieee pure-endian" floating point numbers */
1329/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1330#if 0 \
1331 || __i386 || __i386__ \
1332 || ECB_GCC_AMD64 \
1333 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1334 || defined __s390__ || defined __s390x__ \
1335 || defined __mips__ \
1336 || defined __alpha__ \
1337 || defined __hppa__ \
1338 || defined __ia64__ \
1339 || defined __m68k__ \
1340 || defined __m88k__ \
1341 || defined __sh__ \
1342 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1343 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1344 || defined __aarch64__
1345 #define ECB_STDFP 1
1346 #include <string.h> /* for memcpy */
1347#else
1348 #define ECB_STDFP 0
1349#endif
1350
1351#ifndef ECB_NO_LIBM
1352
1353 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1354
1355 /* only the oldest of old doesn't have this one. solaris. */
1356 #ifdef INFINITY
1357 #define ECB_INFINITY INFINITY
1358 #else
1359 #define ECB_INFINITY HUGE_VAL
1360 #endif
1361
1362 #ifdef NAN
1363 #define ECB_NAN NAN
1364 #else
1365 #define ECB_NAN ECB_INFINITY
1366 #endif
1367
1368 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1369 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1370 #define ecb_frexpf(x,e) frexpf ((x), (e))
1371 #else
1372 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1373 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1374 #endif
1375
1376 /* convert a float to ieee single/binary32 */
1377 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1378 ecb_function_ ecb_const uint32_t
1379 ecb_float_to_binary32 (float x)
1380 {
1381 uint32_t r;
1382
1383 #if ECB_STDFP
1384 memcpy (&r, &x, 4);
1385 #else
1386 /* slow emulation, works for anything but -0 */
1387 uint32_t m;
1388 int e;
1389
1390 if (x == 0e0f ) return 0x00000000U;
1391 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1392 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1393 if (x != x ) return 0x7fbfffffU;
1394
1395 m = ecb_frexpf (x, &e) * 0x1000000U;
1396
1397 r = m & 0x80000000U;
1398
1399 if (r)
1400 m = -m;
1401
1402 if (e <= -126)
1403 {
1404 m &= 0xffffffU;
1405 m >>= (-125 - e);
1406 e = -126;
1407 }
1408
1409 r |= (e + 126) << 23;
1410 r |= m & 0x7fffffU;
1411 #endif
1412
1413 return r;
1414 }
1415
1416 /* converts an ieee single/binary32 to a float */
1417 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1418 ecb_function_ ecb_const float
1419 ecb_binary32_to_float (uint32_t x)
1420 {
1421 float r;
1422
1423 #if ECB_STDFP
1424 memcpy (&r, &x, 4);
1425 #else
1426 /* emulation, only works for normals and subnormals and +0 */
1427 int neg = x >> 31;
1428 int e = (x >> 23) & 0xffU;
1429
1430 x &= 0x7fffffU;
1431
1432 if (e)
1433 x |= 0x800000U;
1434 else
1435 e = 1;
1436
1437 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1438 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1439
1440 r = neg ? -r : r;
1441 #endif
1442
1443 return r;
1444 }
1445
1446 /* convert a double to ieee double/binary64 */
1447 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1448 ecb_function_ ecb_const uint64_t
1449 ecb_double_to_binary64 (double x)
1450 {
1451 uint64_t r;
1452
1453 #if ECB_STDFP
1454 memcpy (&r, &x, 8);
1455 #else
1456 /* slow emulation, works for anything but -0 */
1457 uint64_t m;
1458 int e;
1459
1460 if (x == 0e0 ) return 0x0000000000000000U;
1461 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1462 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1463 if (x != x ) return 0X7ff7ffffffffffffU;
1464
1465 m = frexp (x, &e) * 0x20000000000000U;
1466
1467 r = m & 0x8000000000000000;;
1468
1469 if (r)
1470 m = -m;
1471
1472 if (e <= -1022)
1473 {
1474 m &= 0x1fffffffffffffU;
1475 m >>= (-1021 - e);
1476 e = -1022;
1477 }
1478
1479 r |= ((uint64_t)(e + 1022)) << 52;
1480 r |= m & 0xfffffffffffffU;
1481 #endif
1482
1483 return r;
1484 }
1485
1486 /* converts an ieee double/binary64 to a double */
1487 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1488 ecb_function_ ecb_const double
1489 ecb_binary64_to_double (uint64_t x)
1490 {
1491 double r;
1492
1493 #if ECB_STDFP
1494 memcpy (&r, &x, 8);
1495 #else
1496 /* emulation, only works for normals and subnormals and +0 */
1497 int neg = x >> 63;
1498 int e = (x >> 52) & 0x7ffU;
1499
1500 x &= 0xfffffffffffffU;
1501
1502 if (e)
1503 x |= 0x10000000000000U;
1504 else
1505 e = 1;
1506
1507 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1508 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1509
1510 r = neg ? -r : r;
1511 #endif
1512
1513 return r;
1514 }
1515
1516 /* convert a float to ieee half/binary16 */
1517 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1518 ecb_function_ ecb_const uint16_t
1519 ecb_float_to_binary16 (float x)
1520 {
1521 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1522 }
1523
1524 /* convert an ieee half/binary16 to float */
1525 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1526 ecb_function_ ecb_const float
1527 ecb_binary16_to_float (uint16_t x)
1528 {
1529 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1530 }
1531
1532#endif
1533
1534#endif
1535
1536/* ECB.H END */
1537
1538#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1539/* if your architecture doesn't need memory fences, e.g. because it is
1540 * single-cpu/core, or if you use libev in a project that doesn't use libev
1541 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1542 * libev, in which cases the memory fences become nops.
1543 * alternatively, you can remove this #error and link against libpthread,
1544 * which will then provide the memory fences.
1545 */
1546# error "memory fences not defined for your architecture, please report"
1547#endif
1548
1549#ifndef ECB_MEMORY_FENCE
1550# define ECB_MEMORY_FENCE do { } while (0)
1551# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1552# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1553#endif
1554
1555#define expect_false(cond) ecb_expect_false (cond)
1556#define expect_true(cond) ecb_expect_true (cond)
1557#define noinline ecb_noinline
1558
476#define inline_size static inline 1559#define inline_size ecb_inline
477 1560
478#if EV_FEATURE_CODE 1561#if EV_FEATURE_CODE
479# define inline_speed static inline 1562# define inline_speed ecb_inline
480#else 1563#else
481# define inline_speed static noinline 1564# define inline_speed noinline static
482#endif 1565#endif
483 1566
484#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1567#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
485 1568
486#if EV_MINPRI == EV_MAXPRI 1569#if EV_MINPRI == EV_MAXPRI
487# define ABSPRI(w) (((W)w), 0) 1570# define ABSPRI(w) (((W)w), 0)
488#else 1571#else
489# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1572# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
490#endif 1573#endif
491 1574
492#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1575#define EMPTY /* required for microsofts broken pseudo-c compiler */
493#define EMPTY2(a,b) /* used to suppress some warnings */
494 1576
495typedef ev_watcher *W; 1577typedef ev_watcher *W;
496typedef ev_watcher_list *WL; 1578typedef ev_watcher_list *WL;
497typedef ev_watcher_time *WT; 1579typedef ev_watcher_time *WT;
498 1580
… …
523# include "ev_win32.c" 1605# include "ev_win32.c"
524#endif 1606#endif
525 1607
526/*****************************************************************************/ 1608/*****************************************************************************/
527 1609
1610#if EV_USE_LINUXAIO
1611# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
1612#endif
1613
1614/* define a suitable floor function (only used by periodics atm) */
1615
1616#if EV_USE_FLOOR
1617# include <math.h>
1618# define ev_floor(v) floor (v)
1619#else
1620
1621#include <float.h>
1622
1623/* a floor() replacement function, should be independent of ev_tstamp type */
1624noinline
1625static ev_tstamp
1626ev_floor (ev_tstamp v)
1627{
1628 /* the choice of shift factor is not terribly important */
1629#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1630 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1631#else
1632 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1633#endif
1634
1635 /* argument too large for an unsigned long? */
1636 if (expect_false (v >= shift))
1637 {
1638 ev_tstamp f;
1639
1640 if (v == v - 1.)
1641 return v; /* very large number */
1642
1643 f = shift * ev_floor (v * (1. / shift));
1644 return f + ev_floor (v - f);
1645 }
1646
1647 /* special treatment for negative args? */
1648 if (expect_false (v < 0.))
1649 {
1650 ev_tstamp f = -ev_floor (-v);
1651
1652 return f - (f == v ? 0 : 1);
1653 }
1654
1655 /* fits into an unsigned long */
1656 return (unsigned long)v;
1657}
1658
1659#endif
1660
1661/*****************************************************************************/
1662
1663#ifdef __linux
1664# include <sys/utsname.h>
1665#endif
1666
1667noinline ecb_cold
1668static unsigned int
1669ev_linux_version (void)
1670{
1671#ifdef __linux
1672 unsigned int v = 0;
1673 struct utsname buf;
1674 int i;
1675 char *p = buf.release;
1676
1677 if (uname (&buf))
1678 return 0;
1679
1680 for (i = 3+1; --i; )
1681 {
1682 unsigned int c = 0;
1683
1684 for (;;)
1685 {
1686 if (*p >= '0' && *p <= '9')
1687 c = c * 10 + *p++ - '0';
1688 else
1689 {
1690 p += *p == '.';
1691 break;
1692 }
1693 }
1694
1695 v = (v << 8) | c;
1696 }
1697
1698 return v;
1699#else
1700 return 0;
1701#endif
1702}
1703
1704/*****************************************************************************/
1705
528#if EV_AVOID_STDIO 1706#if EV_AVOID_STDIO
529static void noinline 1707noinline ecb_cold
1708static void
530ev_printerr (const char *msg) 1709ev_printerr (const char *msg)
531{ 1710{
532 write (STDERR_FILENO, msg, strlen (msg)); 1711 write (STDERR_FILENO, msg, strlen (msg));
533} 1712}
534#endif 1713#endif
535 1714
536static void (*syserr_cb)(const char *msg); 1715static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
537 1716
1717ecb_cold
538void 1718void
539ev_set_syserr_cb (void (*cb)(const char *msg)) 1719ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
540{ 1720{
541 syserr_cb = cb; 1721 syserr_cb = cb;
542} 1722}
543 1723
544static void noinline 1724noinline ecb_cold
1725static void
545ev_syserr (const char *msg) 1726ev_syserr (const char *msg)
546{ 1727{
547 if (!msg) 1728 if (!msg)
548 msg = "(libev) system error"; 1729 msg = "(libev) system error";
549 1730
550 if (syserr_cb) 1731 if (syserr_cb)
551 syserr_cb (msg); 1732 syserr_cb (msg);
552 else 1733 else
553 { 1734 {
554#if EV_AVOID_STDIO 1735#if EV_AVOID_STDIO
555 const char *err = strerror (errno);
556
557 ev_printerr (msg); 1736 ev_printerr (msg);
558 ev_printerr (": "); 1737 ev_printerr (": ");
559 ev_printerr (err); 1738 ev_printerr (strerror (errno));
560 ev_printerr ("\n"); 1739 ev_printerr ("\n");
561#else 1740#else
562 perror (msg); 1741 perror (msg);
563#endif 1742#endif
564 abort (); 1743 abort ();
565 } 1744 }
566} 1745}
567 1746
568static void * 1747static void *
569ev_realloc_emul (void *ptr, long size) 1748ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
570{ 1749{
571#if __GLIBC__
572 return realloc (ptr, size);
573#else
574 /* some systems, notably openbsd and darwin, fail to properly 1750 /* some systems, notably openbsd and darwin, fail to properly
575 * implement realloc (x, 0) (as required by both ansi c-89 and 1751 * implement realloc (x, 0) (as required by both ansi c-89 and
576 * the single unix specification, so work around them here. 1752 * the single unix specification, so work around them here.
1753 * recently, also (at least) fedora and debian started breaking it,
1754 * despite documenting it otherwise.
577 */ 1755 */
578 1756
579 if (size) 1757 if (size)
580 return realloc (ptr, size); 1758 return realloc (ptr, size);
581 1759
582 free (ptr); 1760 free (ptr);
583 return 0; 1761 return 0;
584#endif
585} 1762}
586 1763
587static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1764static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
588 1765
1766ecb_cold
589void 1767void
590ev_set_allocator (void *(*cb)(void *ptr, long size)) 1768ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
591{ 1769{
592 alloc = cb; 1770 alloc = cb;
593} 1771}
594 1772
595inline_speed void * 1773inline_speed void *
… …
598 ptr = alloc (ptr, size); 1776 ptr = alloc (ptr, size);
599 1777
600 if (!ptr && size) 1778 if (!ptr && size)
601 { 1779 {
602#if EV_AVOID_STDIO 1780#if EV_AVOID_STDIO
603 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1781 ev_printerr ("(libev) memory allocation failed, aborting.\n");
604#else 1782#else
605 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1783 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
606#endif 1784#endif
607 abort (); 1785 abort ();
608 } 1786 }
609 1787
610 return ptr; 1788 return ptr;
… …
622typedef struct 1800typedef struct
623{ 1801{
624 WL head; 1802 WL head;
625 unsigned char events; /* the events watched for */ 1803 unsigned char events; /* the events watched for */
626 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ 1804 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 */ 1805 unsigned char emask; /* some backends store the actual kernel mask in here */
628 unsigned char unused; 1806 unsigned char unused;
629#if EV_USE_EPOLL 1807#if EV_USE_EPOLL
630 unsigned int egen; /* generation counter to counter epoll bugs */ 1808 unsigned int egen; /* generation counter to counter epoll bugs */
631#endif 1809#endif
632#if EV_SELECT_IS_WINSOCKET 1810#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
633 SOCKET handle; 1811 SOCKET handle;
1812#endif
1813#if EV_USE_IOCP
1814 OVERLAPPED or, ow;
634#endif 1815#endif
635} ANFD; 1816} ANFD;
636 1817
637/* stores the pending event set for a given watcher */ 1818/* stores the pending event set for a given watcher */
638typedef struct 1819typedef struct
… …
680 #undef VAR 1861 #undef VAR
681 }; 1862 };
682 #include "ev_wrap.h" 1863 #include "ev_wrap.h"
683 1864
684 static struct ev_loop default_loop_struct; 1865 static struct ev_loop default_loop_struct;
685 struct ev_loop *ev_default_loop_ptr; 1866 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
686 1867
687#else 1868#else
688 1869
689 ev_tstamp ev_rt_now; 1870 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
690 #define VAR(name,decl) static decl; 1871 #define VAR(name,decl) static decl;
691 #include "ev_vars.h" 1872 #include "ev_vars.h"
692 #undef VAR 1873 #undef VAR
693 1874
694 static int ev_default_loop_ptr; 1875 static int ev_default_loop_ptr;
… …
709 1890
710/*****************************************************************************/ 1891/*****************************************************************************/
711 1892
712#ifndef EV_HAVE_EV_TIME 1893#ifndef EV_HAVE_EV_TIME
713ev_tstamp 1894ev_tstamp
714ev_time (void) 1895ev_time (void) EV_NOEXCEPT
715{ 1896{
716#if EV_USE_REALTIME 1897#if EV_USE_REALTIME
717 if (expect_true (have_realtime)) 1898 if (expect_true (have_realtime))
718 { 1899 {
719 struct timespec ts; 1900 struct timespec ts;
… …
743 return ev_time (); 1924 return ev_time ();
744} 1925}
745 1926
746#if EV_MULTIPLICITY 1927#if EV_MULTIPLICITY
747ev_tstamp 1928ev_tstamp
748ev_now (EV_P) 1929ev_now (EV_P) EV_NOEXCEPT
749{ 1930{
750 return ev_rt_now; 1931 return ev_rt_now;
751} 1932}
752#endif 1933#endif
753 1934
754void 1935void
755ev_sleep (ev_tstamp delay) 1936ev_sleep (ev_tstamp delay) EV_NOEXCEPT
756{ 1937{
757 if (delay > 0.) 1938 if (delay > 0.)
758 { 1939 {
759#if EV_USE_NANOSLEEP 1940#if EV_USE_NANOSLEEP
760 struct timespec ts; 1941 struct timespec ts;
761 1942
762 EV_TS_SET (ts, delay); 1943 EV_TS_SET (ts, delay);
763 nanosleep (&ts, 0); 1944 nanosleep (&ts, 0);
764#elif defined(_WIN32) 1945#elif defined _WIN32
1946 /* maybe this should round up, as ms is very low resolution */
1947 /* compared to select (µs) or nanosleep (ns) */
765 Sleep ((unsigned long)(delay * 1e3)); 1948 Sleep ((unsigned long)(delay * 1e3));
766#else 1949#else
767 struct timeval tv; 1950 struct timeval tv;
768 1951
769 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1952 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
788 1971
789 do 1972 do
790 ncur <<= 1; 1973 ncur <<= 1;
791 while (cnt > ncur); 1974 while (cnt > ncur);
792 1975
793 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1976 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
794 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1977 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
795 { 1978 {
796 ncur *= elem; 1979 ncur *= elem;
797 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1980 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
798 ncur = ncur - sizeof (void *) * 4; 1981 ncur = ncur - sizeof (void *) * 4;
… …
800 } 1983 }
801 1984
802 return ncur; 1985 return ncur;
803} 1986}
804 1987
805static noinline void * 1988noinline ecb_cold
1989static void *
806array_realloc (int elem, void *base, int *cur, int cnt) 1990array_realloc (int elem, void *base, int *cur, int cnt)
807{ 1991{
808 *cur = array_nextsize (elem, *cur, cnt); 1992 *cur = array_nextsize (elem, *cur, cnt);
809 return ev_realloc (base, elem * *cur); 1993 return ev_realloc (base, elem * *cur);
810} 1994}
811 1995
1996#define array_needsize_noinit(base,offset,count)
1997
812#define array_init_zero(base,count) \ 1998#define array_needsize_zerofill(base,offset,count) \
813 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1999 memset ((void *)(base + offset), 0, sizeof (*(base)) * (count))
814 2000
815#define array_needsize(type,base,cur,cnt,init) \ 2001#define array_needsize(type,base,cur,cnt,init) \
816 if (expect_false ((cnt) > (cur))) \ 2002 if (expect_false ((cnt) > (cur))) \
817 { \ 2003 { \
818 int ocur_ = (cur); \ 2004 ecb_unused int ocur_ = (cur); \
819 (base) = (type *)array_realloc \ 2005 (base) = (type *)array_realloc \
820 (sizeof (type), (base), &(cur), (cnt)); \ 2006 (sizeof (type), (base), &(cur), (cnt)); \
821 init ((base) + (ocur_), (cur) - ocur_); \ 2007 init ((base), ocur_, ((cur) - ocur_)); \
822 } 2008 }
823 2009
824#if 0 2010#if 0
825#define array_slim(type,stem) \ 2011#define array_slim(type,stem) \
826 if (stem ## max < array_roundsize (stem ## cnt >> 2)) \ 2012 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 2021 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
836 2022
837/*****************************************************************************/ 2023/*****************************************************************************/
838 2024
839/* dummy callback for pending events */ 2025/* dummy callback for pending events */
840static void noinline 2026noinline
2027static void
841pendingcb (EV_P_ ev_prepare *w, int revents) 2028pendingcb (EV_P_ ev_prepare *w, int revents)
842{ 2029{
843} 2030}
844 2031
845void noinline 2032noinline
2033void
846ev_feed_event (EV_P_ void *w, int revents) 2034ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
847{ 2035{
848 W w_ = (W)w; 2036 W w_ = (W)w;
849 int pri = ABSPRI (w_); 2037 int pri = ABSPRI (w_);
850 2038
851 if (expect_false (w_->pending)) 2039 if (expect_false (w_->pending))
852 pendings [pri][w_->pending - 1].events |= revents; 2040 pendings [pri][w_->pending - 1].events |= revents;
853 else 2041 else
854 { 2042 {
855 w_->pending = ++pendingcnt [pri]; 2043 w_->pending = ++pendingcnt [pri];
856 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2044 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
857 pendings [pri][w_->pending - 1].w = w_; 2045 pendings [pri][w_->pending - 1].w = w_;
858 pendings [pri][w_->pending - 1].events = revents; 2046 pendings [pri][w_->pending - 1].events = revents;
859 } 2047 }
2048
2049 pendingpri = NUMPRI - 1;
860} 2050}
861 2051
862inline_speed void 2052inline_speed void
863feed_reverse (EV_P_ W w) 2053feed_reverse (EV_P_ W w)
864{ 2054{
865 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); 2055 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
866 rfeeds [rfeedcnt++] = w; 2056 rfeeds [rfeedcnt++] = w;
867} 2057}
868 2058
869inline_size void 2059inline_size void
870feed_reverse_done (EV_P_ int revents) 2060feed_reverse_done (EV_P_ int revents)
… …
910 if (expect_true (!anfd->reify)) 2100 if (expect_true (!anfd->reify))
911 fd_event_nocheck (EV_A_ fd, revents); 2101 fd_event_nocheck (EV_A_ fd, revents);
912} 2102}
913 2103
914void 2104void
915ev_feed_fd_event (EV_P_ int fd, int revents) 2105ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
916{ 2106{
917 if (fd >= 0 && fd < anfdmax) 2107 if (fd >= 0 && fd < anfdmax)
918 fd_event_nocheck (EV_A_ fd, revents); 2108 fd_event_nocheck (EV_A_ fd, revents);
919} 2109}
920 2110
… …
923inline_size void 2113inline_size void
924fd_reify (EV_P) 2114fd_reify (EV_P)
925{ 2115{
926 int i; 2116 int i;
927 2117
2118#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2119 for (i = 0; i < fdchangecnt; ++i)
2120 {
2121 int fd = fdchanges [i];
2122 ANFD *anfd = anfds + fd;
2123
2124 if (anfd->reify & EV__IOFDSET && anfd->head)
2125 {
2126 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2127
2128 if (handle != anfd->handle)
2129 {
2130 unsigned long arg;
2131
2132 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2133
2134 /* handle changed, but fd didn't - we need to do it in two steps */
2135 backend_modify (EV_A_ fd, anfd->events, 0);
2136 anfd->events = 0;
2137 anfd->handle = handle;
2138 }
2139 }
2140 }
2141#endif
2142
928 for (i = 0; i < fdchangecnt; ++i) 2143 for (i = 0; i < fdchangecnt; ++i)
929 { 2144 {
930 int fd = fdchanges [i]; 2145 int fd = fdchanges [i];
931 ANFD *anfd = anfds + fd; 2146 ANFD *anfd = anfds + fd;
932 ev_io *w; 2147 ev_io *w;
933 2148
934 unsigned char o_events = anfd->events; 2149 unsigned char o_events = anfd->events;
935 unsigned char o_reify = anfd->reify; 2150 unsigned char o_reify = anfd->reify;
936 2151
937 anfd->reify = 0; 2152 anfd->reify = 0;
938
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 2153
948 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 2154 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
949 { 2155 {
950 anfd->events = 0; 2156 anfd->events = 0;
951 2157
… …
962 2168
963 fdchangecnt = 0; 2169 fdchangecnt = 0;
964} 2170}
965 2171
966/* something about the given fd changed */ 2172/* something about the given fd changed */
967inline_size void 2173inline_size
2174void
968fd_change (EV_P_ int fd, int flags) 2175fd_change (EV_P_ int fd, int flags)
969{ 2176{
970 unsigned char reify = anfds [fd].reify; 2177 unsigned char reify = anfds [fd].reify;
971 anfds [fd].reify |= flags; 2178 anfds [fd].reify |= flags;
972 2179
973 if (expect_true (!reify)) 2180 if (expect_true (!reify))
974 { 2181 {
975 ++fdchangecnt; 2182 ++fdchangecnt;
976 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2183 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
977 fdchanges [fdchangecnt - 1] = fd; 2184 fdchanges [fdchangecnt - 1] = fd;
978 } 2185 }
979} 2186}
980 2187
981/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 2188/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
982inline_speed void 2189inline_speed ecb_cold void
983fd_kill (EV_P_ int fd) 2190fd_kill (EV_P_ int fd)
984{ 2191{
985 ev_io *w; 2192 ev_io *w;
986 2193
987 while ((w = (ev_io *)anfds [fd].head)) 2194 while ((w = (ev_io *)anfds [fd].head))
… …
990 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2197 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
991 } 2198 }
992} 2199}
993 2200
994/* check whether the given fd is actually valid, for error recovery */ 2201/* check whether the given fd is actually valid, for error recovery */
995inline_size int 2202inline_size ecb_cold int
996fd_valid (int fd) 2203fd_valid (int fd)
997{ 2204{
998#ifdef _WIN32 2205#ifdef _WIN32
999 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2206 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1000#else 2207#else
1001 return fcntl (fd, F_GETFD) != -1; 2208 return fcntl (fd, F_GETFD) != -1;
1002#endif 2209#endif
1003} 2210}
1004 2211
1005/* called on EBADF to verify fds */ 2212/* called on EBADF to verify fds */
1006static void noinline 2213noinline ecb_cold
2214static void
1007fd_ebadf (EV_P) 2215fd_ebadf (EV_P)
1008{ 2216{
1009 int fd; 2217 int fd;
1010 2218
1011 for (fd = 0; fd < anfdmax; ++fd) 2219 for (fd = 0; fd < anfdmax; ++fd)
… …
1013 if (!fd_valid (fd) && errno == EBADF) 2221 if (!fd_valid (fd) && errno == EBADF)
1014 fd_kill (EV_A_ fd); 2222 fd_kill (EV_A_ fd);
1015} 2223}
1016 2224
1017/* called on ENOMEM in select/poll to kill some fds and retry */ 2225/* called on ENOMEM in select/poll to kill some fds and retry */
1018static void noinline 2226noinline ecb_cold
2227static void
1019fd_enomem (EV_P) 2228fd_enomem (EV_P)
1020{ 2229{
1021 int fd; 2230 int fd;
1022 2231
1023 for (fd = anfdmax; fd--; ) 2232 for (fd = anfdmax; fd--; )
… …
1027 break; 2236 break;
1028 } 2237 }
1029} 2238}
1030 2239
1031/* usually called after fork if backend needs to re-arm all fds from scratch */ 2240/* usually called after fork if backend needs to re-arm all fds from scratch */
1032static void noinline 2241noinline
2242static void
1033fd_rearm_all (EV_P) 2243fd_rearm_all (EV_P)
1034{ 2244{
1035 int fd; 2245 int fd;
1036 2246
1037 for (fd = 0; fd < anfdmax; ++fd) 2247 for (fd = 0; fd < anfdmax; ++fd)
… …
1218 2428
1219/*****************************************************************************/ 2429/*****************************************************************************/
1220 2430
1221#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2431#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1222 2432
1223static void noinline 2433noinline ecb_cold
2434static void
1224evpipe_init (EV_P) 2435evpipe_init (EV_P)
1225{ 2436{
1226 if (!ev_is_active (&pipe_w)) 2437 if (!ev_is_active (&pipe_w))
1227 { 2438 {
2439 int fds [2];
2440
1228# if EV_USE_EVENTFD 2441# if EV_USE_EVENTFD
2442 fds [0] = -1;
1229 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2443 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1230 if (evfd < 0 && errno == EINVAL) 2444 if (fds [1] < 0 && errno == EINVAL)
1231 evfd = eventfd (0, 0); 2445 fds [1] = eventfd (0, 0);
1232 2446
1233 if (evfd >= 0) 2447 if (fds [1] < 0)
2448# endif
1234 { 2449 {
2450 while (pipe (fds))
2451 ev_syserr ("(libev) error creating signal/async pipe");
2452
2453 fd_intern (fds [0]);
2454 }
2455
1235 evpipe [0] = -1; 2456 evpipe [0] = fds [0];
1236 fd_intern (evfd); /* doing it twice doesn't hurt */ 2457
1237 ev_io_set (&pipe_w, evfd, EV_READ); 2458 if (evpipe [1] < 0)
2459 evpipe [1] = fds [1]; /* first call, set write fd */
2460 else
2461 {
2462 /* on subsequent calls, do not change evpipe [1] */
2463 /* so that evpipe_write can always rely on its value. */
2464 /* this branch does not do anything sensible on windows, */
2465 /* so must not be executed on windows */
2466
2467 dup2 (fds [1], evpipe [1]);
2468 close (fds [1]);
2469 }
2470
2471 fd_intern (evpipe [1]);
2472
2473 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2474 ev_io_start (EV_A_ &pipe_w);
2475 ev_unref (EV_A); /* watcher should not keep loop alive */
2476 }
2477}
2478
2479inline_speed void
2480evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2481{
2482 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2483
2484 if (expect_true (*flag))
2485 return;
2486
2487 *flag = 1;
2488 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2489
2490 pipe_write_skipped = 1;
2491
2492 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2493
2494 if (pipe_write_wanted)
2495 {
2496 int old_errno;
2497
2498 pipe_write_skipped = 0;
2499 ECB_MEMORY_FENCE_RELEASE;
2500
2501 old_errno = errno; /* save errno because write will clobber it */
2502
2503#if EV_USE_EVENTFD
2504 if (evpipe [0] < 0)
2505 {
2506 uint64_t counter = 1;
2507 write (evpipe [1], &counter, sizeof (uint64_t));
1238 } 2508 }
1239 else 2509 else
1240# endif 2510#endif
1241 { 2511 {
1242 while (pipe (evpipe)) 2512#ifdef _WIN32
1243 ev_syserr ("(libev) error creating signal/async pipe"); 2513 WSABUF buf;
1244 2514 DWORD sent;
1245 fd_intern (evpipe [0]); 2515 buf.buf = (char *)&buf;
1246 fd_intern (evpipe [1]); 2516 buf.len = 1;
1247 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2517 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2518#else
2519 write (evpipe [1], &(evpipe [1]), 1);
2520#endif
1248 } 2521 }
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 2522
1280 errno = old_errno; 2523 errno = old_errno;
1281 } 2524 }
1282} 2525}
1283 2526
… …
1286static void 2529static void
1287pipecb (EV_P_ ev_io *iow, int revents) 2530pipecb (EV_P_ ev_io *iow, int revents)
1288{ 2531{
1289 int i; 2532 int i;
1290 2533
2534 if (revents & EV_READ)
2535 {
1291#if EV_USE_EVENTFD 2536#if EV_USE_EVENTFD
1292 if (evfd >= 0) 2537 if (evpipe [0] < 0)
1293 { 2538 {
1294 uint64_t counter; 2539 uint64_t counter;
1295 read (evfd, &counter, sizeof (uint64_t)); 2540 read (evpipe [1], &counter, sizeof (uint64_t));
1296 } 2541 }
1297 else 2542 else
1298#endif 2543#endif
1299 { 2544 {
1300 char dummy; 2545 char dummy[4];
1301 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2546#ifdef _WIN32
2547 WSABUF buf;
2548 DWORD recvd;
2549 DWORD flags = 0;
2550 buf.buf = dummy;
2551 buf.len = sizeof (dummy);
2552 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2553#else
1302 read (evpipe [0], &dummy, 1); 2554 read (evpipe [0], &dummy, sizeof (dummy));
2555#endif
2556 }
1303 } 2557 }
1304 2558
2559 pipe_write_skipped = 0;
2560
2561 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2562
2563#if EV_SIGNAL_ENABLE
1305 if (sig_pending) 2564 if (sig_pending)
1306 { 2565 {
1307 sig_pending = 0; 2566 sig_pending = 0;
2567
2568 ECB_MEMORY_FENCE;
1308 2569
1309 for (i = EV_NSIG - 1; i--; ) 2570 for (i = EV_NSIG - 1; i--; )
1310 if (expect_false (signals [i].pending)) 2571 if (expect_false (signals [i].pending))
1311 ev_feed_signal_event (EV_A_ i + 1); 2572 ev_feed_signal_event (EV_A_ i + 1);
1312 } 2573 }
2574#endif
1313 2575
1314#if EV_ASYNC_ENABLE 2576#if EV_ASYNC_ENABLE
1315 if (async_pending) 2577 if (async_pending)
1316 { 2578 {
1317 async_pending = 0; 2579 async_pending = 0;
2580
2581 ECB_MEMORY_FENCE;
1318 2582
1319 for (i = asynccnt; i--; ) 2583 for (i = asynccnt; i--; )
1320 if (asyncs [i]->sent) 2584 if (asyncs [i]->sent)
1321 { 2585 {
1322 asyncs [i]->sent = 0; 2586 asyncs [i]->sent = 0;
2587 ECB_MEMORY_FENCE_RELEASE;
1323 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2588 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1324 } 2589 }
1325 } 2590 }
1326#endif 2591#endif
1327} 2592}
1328 2593
1329/*****************************************************************************/ 2594/*****************************************************************************/
1330 2595
2596void
2597ev_feed_signal (int signum) EV_NOEXCEPT
2598{
2599#if EV_MULTIPLICITY
2600 EV_P;
2601 ECB_MEMORY_FENCE_ACQUIRE;
2602 EV_A = signals [signum - 1].loop;
2603
2604 if (!EV_A)
2605 return;
2606#endif
2607
2608 signals [signum - 1].pending = 1;
2609 evpipe_write (EV_A_ &sig_pending);
2610}
2611
1331static void 2612static void
1332ev_sighandler (int signum) 2613ev_sighandler (int signum)
1333{ 2614{
1334#if EV_MULTIPLICITY
1335 EV_P = signals [signum - 1].loop;
1336#endif
1337
1338#ifdef _WIN32 2615#ifdef _WIN32
1339 signal (signum, ev_sighandler); 2616 signal (signum, ev_sighandler);
1340#endif 2617#endif
1341 2618
1342 signals [signum - 1].pending = 1; 2619 ev_feed_signal (signum);
1343 evpipe_write (EV_A_ &sig_pending);
1344} 2620}
1345 2621
1346void noinline 2622noinline
2623void
1347ev_feed_signal_event (EV_P_ int signum) 2624ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
1348{ 2625{
1349 WL w; 2626 WL w;
1350 2627
1351 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2628 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1352 return; 2629 return;
1353 2630
1354 --signum; 2631 --signum;
1355 2632
1356#if EV_MULTIPLICITY 2633#if EV_MULTIPLICITY
… …
1360 if (expect_false (signals [signum].loop != EV_A)) 2637 if (expect_false (signals [signum].loop != EV_A))
1361 return; 2638 return;
1362#endif 2639#endif
1363 2640
1364 signals [signum].pending = 0; 2641 signals [signum].pending = 0;
2642 ECB_MEMORY_FENCE_RELEASE;
1365 2643
1366 for (w = signals [signum].head; w; w = w->next) 2644 for (w = signals [signum].head; w; w = w->next)
1367 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2645 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1368} 2646}
1369 2647
… …
1448 2726
1449#endif 2727#endif
1450 2728
1451/*****************************************************************************/ 2729/*****************************************************************************/
1452 2730
2731#if EV_USE_IOCP
2732# include "ev_iocp.c"
2733#endif
1453#if EV_USE_PORT 2734#if EV_USE_PORT
1454# include "ev_port.c" 2735# include "ev_port.c"
1455#endif 2736#endif
1456#if EV_USE_KQUEUE 2737#if EV_USE_KQUEUE
1457# include "ev_kqueue.c" 2738# include "ev_kqueue.c"
1458#endif 2739#endif
1459#if EV_USE_EPOLL 2740#if EV_USE_EPOLL
1460# include "ev_epoll.c" 2741# include "ev_epoll.c"
1461#endif 2742#endif
2743#if EV_USE_LINUXAIO
2744# include "ev_linuxaio.c"
2745#endif
1462#if EV_USE_POLL 2746#if EV_USE_POLL
1463# include "ev_poll.c" 2747# include "ev_poll.c"
1464#endif 2748#endif
1465#if EV_USE_SELECT 2749#if EV_USE_SELECT
1466# include "ev_select.c" 2750# include "ev_select.c"
1467#endif 2751#endif
1468 2752
1469int 2753ecb_cold int
1470ev_version_major (void) 2754ev_version_major (void) EV_NOEXCEPT
1471{ 2755{
1472 return EV_VERSION_MAJOR; 2756 return EV_VERSION_MAJOR;
1473} 2757}
1474 2758
1475int 2759ecb_cold int
1476ev_version_minor (void) 2760ev_version_minor (void) EV_NOEXCEPT
1477{ 2761{
1478 return EV_VERSION_MINOR; 2762 return EV_VERSION_MINOR;
1479} 2763}
1480 2764
1481/* return true if we are running with elevated privileges and should ignore env variables */ 2765/* return true if we are running with elevated privileges and should ignore env variables */
1482int inline_size 2766inline_size ecb_cold int
1483enable_secure (void) 2767enable_secure (void)
1484{ 2768{
1485#ifdef _WIN32 2769#ifdef _WIN32
1486 return 0; 2770 return 0;
1487#else 2771#else
1488 return getuid () != geteuid () 2772 return getuid () != geteuid ()
1489 || getgid () != getegid (); 2773 || getgid () != getegid ();
1490#endif 2774#endif
1491} 2775}
1492 2776
2777ecb_cold
1493unsigned int 2778unsigned int
1494ev_supported_backends (void) 2779ev_supported_backends (void) EV_NOEXCEPT
1495{ 2780{
1496 unsigned int flags = 0; 2781 unsigned int flags = 0;
1497 2782
1498 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2783 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1499 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2784 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1500 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 2785 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2786 if (EV_USE_LINUXAIO) flags |= EVBACKEND_LINUXAIO;
1501 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 2787 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1502 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2788 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
1503 2789
1504 return flags; 2790 return flags;
1505} 2791}
1506 2792
2793ecb_cold
1507unsigned int 2794unsigned int
1508ev_recommended_backends (void) 2795ev_recommended_backends (void) EV_NOEXCEPT
1509{ 2796{
1510 unsigned int flags = ev_supported_backends (); 2797 unsigned int flags = ev_supported_backends ();
1511 2798
1512#ifndef __NetBSD__ 2799#ifndef __NetBSD__
1513 /* kqueue is borked on everything but netbsd apparently */ 2800 /* kqueue is borked on everything but netbsd apparently */
… …
1521#endif 2808#endif
1522#ifdef __FreeBSD__ 2809#ifdef __FreeBSD__
1523 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */ 2810 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1524#endif 2811#endif
1525 2812
2813 /* TODO: linuxaio is very experimental */
2814#if !EV_RECOMMEND_LINUXAIO
2815 flags &= ~EVBACKEND_LINUXAIO;
2816#endif
2817
1526 return flags; 2818 return flags;
1527} 2819}
1528 2820
2821ecb_cold
1529unsigned int 2822unsigned int
1530ev_embeddable_backends (void) 2823ev_embeddable_backends (void) EV_NOEXCEPT
1531{ 2824{
1532 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2825 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1533 2826
1534 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2827 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1535 /* please fix it and tell me how to detect the fix */ 2828 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
1536 flags &= ~EVBACKEND_EPOLL; 2829 flags &= ~EVBACKEND_EPOLL;
1537 2830
1538 return flags; 2831 return flags;
1539} 2832}
1540 2833
1541unsigned int 2834unsigned int
1542ev_backend (EV_P) 2835ev_backend (EV_P) EV_NOEXCEPT
1543{ 2836{
1544 return backend; 2837 return backend;
1545} 2838}
1546 2839
1547#if EV_FEATURE_API 2840#if EV_FEATURE_API
1548unsigned int 2841unsigned int
1549ev_iteration (EV_P) 2842ev_iteration (EV_P) EV_NOEXCEPT
1550{ 2843{
1551 return loop_count; 2844 return loop_count;
1552} 2845}
1553 2846
1554unsigned int 2847unsigned int
1555ev_depth (EV_P) 2848ev_depth (EV_P) EV_NOEXCEPT
1556{ 2849{
1557 return loop_depth; 2850 return loop_depth;
1558} 2851}
1559 2852
1560void 2853void
1561ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2854ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1562{ 2855{
1563 io_blocktime = interval; 2856 io_blocktime = interval;
1564} 2857}
1565 2858
1566void 2859void
1567ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2860ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1568{ 2861{
1569 timeout_blocktime = interval; 2862 timeout_blocktime = interval;
1570} 2863}
1571 2864
1572void 2865void
1573ev_set_userdata (EV_P_ void *data) 2866ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
1574{ 2867{
1575 userdata = data; 2868 userdata = data;
1576} 2869}
1577 2870
1578void * 2871void *
1579ev_userdata (EV_P) 2872ev_userdata (EV_P) EV_NOEXCEPT
1580{ 2873{
1581 return userdata; 2874 return userdata;
1582} 2875}
1583 2876
2877void
1584void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2878ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
1585{ 2879{
1586 invoke_cb = invoke_pending_cb; 2880 invoke_cb = invoke_pending_cb;
1587} 2881}
1588 2882
2883void
1589void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2884ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
1590{ 2885{
1591 release_cb = release; 2886 release_cb = release;
1592 acquire_cb = acquire; 2887 acquire_cb = acquire;
1593} 2888}
1594#endif 2889#endif
1595 2890
1596/* initialise a loop structure, must be zero-initialised */ 2891/* initialise a loop structure, must be zero-initialised */
1597static void noinline 2892noinline ecb_cold
2893static void
1598loop_init (EV_P_ unsigned int flags) 2894loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1599{ 2895{
1600 if (!backend) 2896 if (!backend)
1601 { 2897 {
2898 origflags = flags;
2899
1602#if EV_USE_REALTIME 2900#if EV_USE_REALTIME
1603 if (!have_realtime) 2901 if (!have_realtime)
1604 { 2902 {
1605 struct timespec ts; 2903 struct timespec ts;
1606 2904
… …
1628 if (!(flags & EVFLAG_NOENV) 2926 if (!(flags & EVFLAG_NOENV)
1629 && !enable_secure () 2927 && !enable_secure ()
1630 && getenv ("LIBEV_FLAGS")) 2928 && getenv ("LIBEV_FLAGS"))
1631 flags = atoi (getenv ("LIBEV_FLAGS")); 2929 flags = atoi (getenv ("LIBEV_FLAGS"));
1632 2930
1633 ev_rt_now = ev_time (); 2931 ev_rt_now = ev_time ();
1634 mn_now = get_clock (); 2932 mn_now = get_clock ();
1635 now_floor = mn_now; 2933 now_floor = mn_now;
1636 rtmn_diff = ev_rt_now - mn_now; 2934 rtmn_diff = ev_rt_now - mn_now;
1637#if EV_FEATURE_API 2935#if EV_FEATURE_API
1638 invoke_cb = ev_invoke_pending; 2936 invoke_cb = ev_invoke_pending;
1639#endif 2937#endif
1640 2938
1641 io_blocktime = 0.; 2939 io_blocktime = 0.;
1642 timeout_blocktime = 0.; 2940 timeout_blocktime = 0.;
1643 backend = 0; 2941 backend = 0;
1644 backend_fd = -1; 2942 backend_fd = -1;
1645 sig_pending = 0; 2943 sig_pending = 0;
1646#if EV_ASYNC_ENABLE 2944#if EV_ASYNC_ENABLE
1647 async_pending = 0; 2945 async_pending = 0;
1648#endif 2946#endif
2947 pipe_write_skipped = 0;
2948 pipe_write_wanted = 0;
2949 evpipe [0] = -1;
2950 evpipe [1] = -1;
1649#if EV_USE_INOTIFY 2951#if EV_USE_INOTIFY
1650 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2952 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1651#endif 2953#endif
1652#if EV_USE_SIGNALFD 2954#if EV_USE_SIGNALFD
1653 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2955 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1654#endif 2956#endif
1655 2957
1656 if (!(flags & 0x0000ffffU)) 2958 if (!(flags & EVBACKEND_MASK))
1657 flags |= ev_recommended_backends (); 2959 flags |= ev_recommended_backends ();
1658 2960
2961#if EV_USE_IOCP
2962 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
2963#endif
1659#if EV_USE_PORT 2964#if EV_USE_PORT
1660 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2965 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1661#endif 2966#endif
1662#if EV_USE_KQUEUE 2967#if EV_USE_KQUEUE
1663 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2968 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
2969#endif
2970#if EV_USE_LINUXAIO
2971 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
1664#endif 2972#endif
1665#if EV_USE_EPOLL 2973#if EV_USE_EPOLL
1666 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 2974 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1667#endif 2975#endif
1668#if EV_USE_POLL 2976#if EV_USE_POLL
1669 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 2977 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1670#endif 2978#endif
1671#if EV_USE_SELECT 2979#if EV_USE_SELECT
1672 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2980 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1673#endif 2981#endif
1674 2982
1675 ev_prepare_init (&pending_w, pendingcb); 2983 ev_prepare_init (&pending_w, pendingcb);
1676 2984
1677#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2985#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
… …
1680#endif 2988#endif
1681 } 2989 }
1682} 2990}
1683 2991
1684/* free up a loop structure */ 2992/* free up a loop structure */
1685static void noinline 2993ecb_cold
2994void
1686loop_destroy (EV_P) 2995ev_loop_destroy (EV_P)
1687{ 2996{
1688 int i; 2997 int i;
2998
2999#if EV_MULTIPLICITY
3000 /* mimic free (0) */
3001 if (!EV_A)
3002 return;
3003#endif
3004
3005#if EV_CLEANUP_ENABLE
3006 /* queue cleanup watchers (and execute them) */
3007 if (expect_false (cleanupcnt))
3008 {
3009 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
3010 EV_INVOKE_PENDING;
3011 }
3012#endif
3013
3014#if EV_CHILD_ENABLE
3015 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
3016 {
3017 ev_ref (EV_A); /* child watcher */
3018 ev_signal_stop (EV_A_ &childev);
3019 }
3020#endif
1689 3021
1690 if (ev_is_active (&pipe_w)) 3022 if (ev_is_active (&pipe_w))
1691 { 3023 {
1692 /*ev_ref (EV_A);*/ 3024 /*ev_ref (EV_A);*/
1693 /*ev_io_stop (EV_A_ &pipe_w);*/ 3025 /*ev_io_stop (EV_A_ &pipe_w);*/
1694 3026
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]); 3027 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1703 EV_WIN32_CLOSE_FD (evpipe [1]); 3028 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1704 }
1705 } 3029 }
1706 3030
1707#if EV_USE_SIGNALFD 3031#if EV_USE_SIGNALFD
1708 if (ev_is_active (&sigfd_w)) 3032 if (ev_is_active (&sigfd_w))
1709 close (sigfd); 3033 close (sigfd);
… …
1715#endif 3039#endif
1716 3040
1717 if (backend_fd >= 0) 3041 if (backend_fd >= 0)
1718 close (backend_fd); 3042 close (backend_fd);
1719 3043
3044#if EV_USE_IOCP
3045 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
3046#endif
1720#if EV_USE_PORT 3047#if EV_USE_PORT
1721 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3048 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1722#endif 3049#endif
1723#if EV_USE_KQUEUE 3050#if EV_USE_KQUEUE
1724 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3051 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3052#endif
3053#if EV_USE_LINUXAIO
3054 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
1725#endif 3055#endif
1726#if EV_USE_EPOLL 3056#if EV_USE_EPOLL
1727 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3057 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1728#endif 3058#endif
1729#if EV_USE_POLL 3059#if EV_USE_POLL
1730 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3060 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1731#endif 3061#endif
1732#if EV_USE_SELECT 3062#if EV_USE_SELECT
1733 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3063 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1734#endif 3064#endif
1735 3065
1736 for (i = NUMPRI; i--; ) 3066 for (i = NUMPRI; i--; )
1737 { 3067 {
1738 array_free (pending, [i]); 3068 array_free (pending, [i]);
… …
1751 array_free (periodic, EMPTY); 3081 array_free (periodic, EMPTY);
1752#endif 3082#endif
1753#if EV_FORK_ENABLE 3083#if EV_FORK_ENABLE
1754 array_free (fork, EMPTY); 3084 array_free (fork, EMPTY);
1755#endif 3085#endif
3086#if EV_CLEANUP_ENABLE
3087 array_free (cleanup, EMPTY);
3088#endif
1756 array_free (prepare, EMPTY); 3089 array_free (prepare, EMPTY);
1757 array_free (check, EMPTY); 3090 array_free (check, EMPTY);
1758#if EV_ASYNC_ENABLE 3091#if EV_ASYNC_ENABLE
1759 array_free (async, EMPTY); 3092 array_free (async, EMPTY);
1760#endif 3093#endif
1761 3094
1762 backend = 0; 3095 backend = 0;
3096
3097#if EV_MULTIPLICITY
3098 if (ev_is_default_loop (EV_A))
3099#endif
3100 ev_default_loop_ptr = 0;
3101#if EV_MULTIPLICITY
3102 else
3103 ev_free (EV_A);
3104#endif
1763} 3105}
1764 3106
1765#if EV_USE_INOTIFY 3107#if EV_USE_INOTIFY
1766inline_size void infy_fork (EV_P); 3108inline_size void infy_fork (EV_P);
1767#endif 3109#endif
1768 3110
1769inline_size void 3111inline_size void
1770loop_fork (EV_P) 3112loop_fork (EV_P)
1771{ 3113{
1772#if EV_USE_PORT 3114#if EV_USE_PORT
1773 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3115 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1774#endif 3116#endif
1775#if EV_USE_KQUEUE 3117#if EV_USE_KQUEUE
1776 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 3118 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3119#endif
3120#if EV_USE_LINUXAIO
3121 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
1777#endif 3122#endif
1778#if EV_USE_EPOLL 3123#if EV_USE_EPOLL
1779 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3124 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1780#endif 3125#endif
1781#if EV_USE_INOTIFY 3126#if EV_USE_INOTIFY
1782 infy_fork (EV_A); 3127 infy_fork (EV_A);
1783#endif 3128#endif
1784 3129
3130#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1785 if (ev_is_active (&pipe_w)) 3131 if (ev_is_active (&pipe_w) && postfork != 2)
1786 { 3132 {
1787 /* this "locks" the handlers against writing to the pipe */ 3133 /* 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 3134
1794 ev_ref (EV_A); 3135 ev_ref (EV_A);
1795 ev_io_stop (EV_A_ &pipe_w); 3136 ev_io_stop (EV_A_ &pipe_w);
1796 3137
1797#if EV_USE_EVENTFD
1798 if (evfd >= 0)
1799 close (evfd);
1800#endif
1801
1802 if (evpipe [0] >= 0) 3138 if (evpipe [0] >= 0)
1803 {
1804 EV_WIN32_CLOSE_FD (evpipe [0]); 3139 EV_WIN32_CLOSE_FD (evpipe [0]);
1805 EV_WIN32_CLOSE_FD (evpipe [1]);
1806 }
1807 3140
1808#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1809 evpipe_init (EV_A); 3141 evpipe_init (EV_A);
1810 /* now iterate over everything, in case we missed something */ 3142 /* iterate over everything, in case we missed something before */
1811 pipecb (EV_A_ &pipe_w, EV_READ); 3143 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1812#endif
1813 } 3144 }
3145#endif
1814 3146
1815 postfork = 0; 3147 postfork = 0;
1816} 3148}
1817 3149
1818#if EV_MULTIPLICITY 3150#if EV_MULTIPLICITY
1819 3151
3152ecb_cold
1820struct ev_loop * 3153struct ev_loop *
1821ev_loop_new (unsigned int flags) 3154ev_loop_new (unsigned int flags) EV_NOEXCEPT
1822{ 3155{
1823 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3156 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1824 3157
1825 memset (EV_A, 0, sizeof (struct ev_loop)); 3158 memset (EV_A, 0, sizeof (struct ev_loop));
1826 loop_init (EV_A_ flags); 3159 loop_init (EV_A_ flags);
1827 3160
1828 if (ev_backend (EV_A)) 3161 if (ev_backend (EV_A))
1829 return EV_A; 3162 return EV_A;
1830 3163
3164 ev_free (EV_A);
1831 return 0; 3165 return 0;
1832} 3166}
1833 3167
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 */ 3168#endif /* multiplicity */
1847 3169
1848#if EV_VERIFY 3170#if EV_VERIFY
1849static void noinline 3171noinline ecb_cold
3172static void
1850verify_watcher (EV_P_ W w) 3173verify_watcher (EV_P_ W w)
1851{ 3174{
1852 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3175 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1853 3176
1854 if (w->pending) 3177 if (w->pending)
1855 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3178 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1856} 3179}
1857 3180
1858static void noinline 3181noinline ecb_cold
3182static void
1859verify_heap (EV_P_ ANHE *heap, int N) 3183verify_heap (EV_P_ ANHE *heap, int N)
1860{ 3184{
1861 int i; 3185 int i;
1862 3186
1863 for (i = HEAP0; i < N + HEAP0; ++i) 3187 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1868 3192
1869 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3193 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1870 } 3194 }
1871} 3195}
1872 3196
1873static void noinline 3197noinline ecb_cold
3198static void
1874array_verify (EV_P_ W *ws, int cnt) 3199array_verify (EV_P_ W *ws, int cnt)
1875{ 3200{
1876 while (cnt--) 3201 while (cnt--)
1877 { 3202 {
1878 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3203 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1880 } 3205 }
1881} 3206}
1882#endif 3207#endif
1883 3208
1884#if EV_FEATURE_API 3209#if EV_FEATURE_API
1885void 3210void ecb_cold
1886ev_verify (EV_P) 3211ev_verify (EV_P) EV_NOEXCEPT
1887{ 3212{
1888#if EV_VERIFY 3213#if EV_VERIFY
1889 int i; 3214 int i;
1890 WL w; 3215 WL w, w2;
1891 3216
1892 assert (activecnt >= -1); 3217 assert (activecnt >= -1);
1893 3218
1894 assert (fdchangemax >= fdchangecnt); 3219 assert (fdchangemax >= fdchangecnt);
1895 for (i = 0; i < fdchangecnt; ++i) 3220 for (i = 0; i < fdchangecnt; ++i)
1896 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3221 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1897 3222
1898 assert (anfdmax >= 0); 3223 assert (anfdmax >= 0);
1899 for (i = 0; i < anfdmax; ++i) 3224 for (i = 0; i < anfdmax; ++i)
3225 {
3226 int j = 0;
3227
1900 for (w = anfds [i].head; w; w = w->next) 3228 for (w = w2 = anfds [i].head; w; w = w->next)
1901 { 3229 {
1902 verify_watcher (EV_A_ (W)w); 3230 verify_watcher (EV_A_ (W)w);
3231
3232 if (j++ & 1)
3233 {
3234 assert (("libev: io watcher list contains a loop", w != w2));
3235 w2 = w2->next;
3236 }
3237
1903 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3238 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)); 3239 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1905 } 3240 }
3241 }
1906 3242
1907 assert (timermax >= timercnt); 3243 assert (timermax >= timercnt);
1908 verify_heap (EV_A_ timers, timercnt); 3244 verify_heap (EV_A_ timers, timercnt);
1909 3245
1910#if EV_PERIODIC_ENABLE 3246#if EV_PERIODIC_ENABLE
… …
1925#if EV_FORK_ENABLE 3261#if EV_FORK_ENABLE
1926 assert (forkmax >= forkcnt); 3262 assert (forkmax >= forkcnt);
1927 array_verify (EV_A_ (W *)forks, forkcnt); 3263 array_verify (EV_A_ (W *)forks, forkcnt);
1928#endif 3264#endif
1929 3265
3266#if EV_CLEANUP_ENABLE
3267 assert (cleanupmax >= cleanupcnt);
3268 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3269#endif
3270
1930#if EV_ASYNC_ENABLE 3271#if EV_ASYNC_ENABLE
1931 assert (asyncmax >= asynccnt); 3272 assert (asyncmax >= asynccnt);
1932 array_verify (EV_A_ (W *)asyncs, asynccnt); 3273 array_verify (EV_A_ (W *)asyncs, asynccnt);
1933#endif 3274#endif
1934 3275
… …
1951#endif 3292#endif
1952} 3293}
1953#endif 3294#endif
1954 3295
1955#if EV_MULTIPLICITY 3296#if EV_MULTIPLICITY
3297ecb_cold
1956struct ev_loop * 3298struct ev_loop *
1957ev_default_loop_init (unsigned int flags)
1958#else 3299#else
1959int 3300int
3301#endif
1960ev_default_loop (unsigned int flags) 3302ev_default_loop (unsigned int flags) EV_NOEXCEPT
1961#endif
1962{ 3303{
1963 if (!ev_default_loop_ptr) 3304 if (!ev_default_loop_ptr)
1964 { 3305 {
1965#if EV_MULTIPLICITY 3306#if EV_MULTIPLICITY
1966 EV_P = ev_default_loop_ptr = &default_loop_struct; 3307 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
1985 3326
1986 return ev_default_loop_ptr; 3327 return ev_default_loop_ptr;
1987} 3328}
1988 3329
1989void 3330void
1990ev_default_destroy (void) 3331ev_loop_fork (EV_P) EV_NOEXCEPT
1991{ 3332{
1992#if EV_MULTIPLICITY 3333 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} 3334}
2015 3335
2016/*****************************************************************************/ 3336/*****************************************************************************/
2017 3337
2018void 3338void
… …
2020{ 3340{
2021 EV_CB_INVOKE ((W)w, revents); 3341 EV_CB_INVOKE ((W)w, revents);
2022} 3342}
2023 3343
2024unsigned int 3344unsigned int
2025ev_pending_count (EV_P) 3345ev_pending_count (EV_P) EV_NOEXCEPT
2026{ 3346{
2027 int pri; 3347 int pri;
2028 unsigned int count = 0; 3348 unsigned int count = 0;
2029 3349
2030 for (pri = NUMPRI; pri--; ) 3350 for (pri = NUMPRI; pri--; )
2031 count += pendingcnt [pri]; 3351 count += pendingcnt [pri];
2032 3352
2033 return count; 3353 return count;
2034} 3354}
2035 3355
2036void noinline 3356noinline
3357void
2037ev_invoke_pending (EV_P) 3358ev_invoke_pending (EV_P)
2038{ 3359{
2039 int pri; 3360 pendingpri = NUMPRI;
2040 3361
2041 for (pri = NUMPRI; pri--; ) 3362 do
3363 {
3364 --pendingpri;
3365
3366 /* pendingpri possibly gets modified in the inner loop */
2042 while (pendingcnt [pri]) 3367 while (pendingcnt [pendingpri])
2043 { 3368 {
2044 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3369 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2045 3370
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; 3371 p->w->pending = 0;
2050 EV_CB_INVOKE (p->w, p->events); 3372 EV_CB_INVOKE (p->w, p->events);
2051 EV_FREQUENT_CHECK; 3373 EV_FREQUENT_CHECK;
2052 } 3374 }
3375 }
3376 while (pendingpri);
2053} 3377}
2054 3378
2055#if EV_IDLE_ENABLE 3379#if EV_IDLE_ENABLE
2056/* make idle watchers pending. this handles the "call-idle */ 3380/* make idle watchers pending. this handles the "call-idle */
2057/* only when higher priorities are idle" logic */ 3381/* only when higher priorities are idle" logic */
… …
2114 feed_reverse_done (EV_A_ EV_TIMER); 3438 feed_reverse_done (EV_A_ EV_TIMER);
2115 } 3439 }
2116} 3440}
2117 3441
2118#if EV_PERIODIC_ENABLE 3442#if EV_PERIODIC_ENABLE
3443
3444noinline
3445static void
3446periodic_recalc (EV_P_ ev_periodic *w)
3447{
3448 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3449 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3450
3451 /* the above almost always errs on the low side */
3452 while (at <= ev_rt_now)
3453 {
3454 ev_tstamp nat = at + w->interval;
3455
3456 /* when resolution fails us, we use ev_rt_now */
3457 if (expect_false (nat == at))
3458 {
3459 at = ev_rt_now;
3460 break;
3461 }
3462
3463 at = nat;
3464 }
3465
3466 ev_at (w) = at;
3467}
3468
2119/* make periodics pending */ 3469/* make periodics pending */
2120inline_size void 3470inline_size void
2121periodics_reify (EV_P) 3471periodics_reify (EV_P)
2122{ 3472{
2123 EV_FREQUENT_CHECK; 3473 EV_FREQUENT_CHECK;
2124 3474
2125 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3475 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2126 { 3476 {
2127 int feed_count = 0;
2128
2129 do 3477 do
2130 { 3478 {
2131 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3479 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2132 3480
2133 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3481 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2142 ANHE_at_cache (periodics [HEAP0]); 3490 ANHE_at_cache (periodics [HEAP0]);
2143 downheap (periodics, periodiccnt, HEAP0); 3491 downheap (periodics, periodiccnt, HEAP0);
2144 } 3492 }
2145 else if (w->interval) 3493 else if (w->interval)
2146 { 3494 {
2147 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3495 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]); 3496 ANHE_at_cache (periodics [HEAP0]);
2162 downheap (periodics, periodiccnt, HEAP0); 3497 downheap (periodics, periodiccnt, HEAP0);
2163 } 3498 }
2164 else 3499 else
2165 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3500 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2173 } 3508 }
2174} 3509}
2175 3510
2176/* simply recalculate all periodics */ 3511/* simply recalculate all periodics */
2177/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3512/* TODO: maybe ensure that at least one event happens when jumping forward? */
2178static void noinline 3513noinline ecb_cold
3514static void
2179periodics_reschedule (EV_P) 3515periodics_reschedule (EV_P)
2180{ 3516{
2181 int i; 3517 int i;
2182 3518
2183 /* adjust periodics after time jump */ 3519 /* adjust periodics after time jump */
… …
2186 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3522 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2187 3523
2188 if (w->reschedule_cb) 3524 if (w->reschedule_cb)
2189 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3525 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2190 else if (w->interval) 3526 else if (w->interval)
2191 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3527 periodic_recalc (EV_A_ w);
2192 3528
2193 ANHE_at_cache (periodics [i]); 3529 ANHE_at_cache (periodics [i]);
2194 } 3530 }
2195 3531
2196 reheap (periodics, periodiccnt); 3532 reheap (periodics, periodiccnt);
2197} 3533}
2198#endif 3534#endif
2199 3535
2200/* adjust all timers by a given offset */ 3536/* adjust all timers by a given offset */
2201static void noinline 3537noinline ecb_cold
3538static void
2202timers_reschedule (EV_P_ ev_tstamp adjust) 3539timers_reschedule (EV_P_ ev_tstamp adjust)
2203{ 3540{
2204 int i; 3541 int i;
2205 3542
2206 for (i = 0; i < timercnt; ++i) 3543 for (i = 0; i < timercnt; ++i)
… …
2243 * doesn't hurt either as we only do this on time-jumps or 3580 * doesn't hurt either as we only do this on time-jumps or
2244 * in the unlikely event of having been preempted here. 3581 * in the unlikely event of having been preempted here.
2245 */ 3582 */
2246 for (i = 4; --i; ) 3583 for (i = 4; --i; )
2247 { 3584 {
3585 ev_tstamp diff;
2248 rtmn_diff = ev_rt_now - mn_now; 3586 rtmn_diff = ev_rt_now - mn_now;
2249 3587
3588 diff = odiff - rtmn_diff;
3589
2250 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3590 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2251 return; /* all is well */ 3591 return; /* all is well */
2252 3592
2253 ev_rt_now = ev_time (); 3593 ev_rt_now = ev_time ();
2254 mn_now = get_clock (); 3594 mn_now = get_clock ();
2255 now_floor = mn_now; 3595 now_floor = mn_now;
… …
2277 3617
2278 mn_now = ev_rt_now; 3618 mn_now = ev_rt_now;
2279 } 3619 }
2280} 3620}
2281 3621
2282void 3622int
2283ev_run (EV_P_ int flags) 3623ev_run (EV_P_ int flags)
2284{ 3624{
2285#if EV_FEATURE_API 3625#if EV_FEATURE_API
2286 ++loop_depth; 3626 ++loop_depth;
2287#endif 3627#endif
… …
2345 ev_tstamp prev_mn_now = mn_now; 3685 ev_tstamp prev_mn_now = mn_now;
2346 3686
2347 /* update time to cancel out callback processing overhead */ 3687 /* update time to cancel out callback processing overhead */
2348 time_update (EV_A_ 1e100); 3688 time_update (EV_A_ 1e100);
2349 3689
3690 /* from now on, we want a pipe-wake-up */
3691 pipe_write_wanted = 1;
3692
3693 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3694
2350 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3695 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2351 { 3696 {
2352 waittime = MAX_BLOCKTIME; 3697 waittime = MAX_BLOCKTIME;
2353 3698
2354 if (timercnt) 3699 if (timercnt)
2355 { 3700 {
2356 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3701 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2357 if (waittime > to) waittime = to; 3702 if (waittime > to) waittime = to;
2358 } 3703 }
2359 3704
2360#if EV_PERIODIC_ENABLE 3705#if EV_PERIODIC_ENABLE
2361 if (periodiccnt) 3706 if (periodiccnt)
2362 { 3707 {
2363 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3708 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2364 if (waittime > to) waittime = to; 3709 if (waittime > to) waittime = to;
2365 } 3710 }
2366#endif 3711#endif
2367 3712
2368 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3713 /* don't let timeouts decrease the waittime below timeout_blocktime */
2369 if (expect_false (waittime < timeout_blocktime)) 3714 if (expect_false (waittime < timeout_blocktime))
2370 waittime = timeout_blocktime; 3715 waittime = timeout_blocktime;
3716
3717 /* at this point, we NEED to wait, so we have to ensure */
3718 /* to pass a minimum nonzero value to the backend */
3719 if (expect_false (waittime < backend_mintime))
3720 waittime = backend_mintime;
2371 3721
2372 /* extra check because io_blocktime is commonly 0 */ 3722 /* extra check because io_blocktime is commonly 0 */
2373 if (expect_false (io_blocktime)) 3723 if (expect_false (io_blocktime))
2374 { 3724 {
2375 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3725 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2376 3726
2377 if (sleeptime > waittime - backend_fudge) 3727 if (sleeptime > waittime - backend_mintime)
2378 sleeptime = waittime - backend_fudge; 3728 sleeptime = waittime - backend_mintime;
2379 3729
2380 if (expect_true (sleeptime > 0.)) 3730 if (expect_true (sleeptime > 0.))
2381 { 3731 {
2382 ev_sleep (sleeptime); 3732 ev_sleep (sleeptime);
2383 waittime -= sleeptime; 3733 waittime -= sleeptime;
… …
2390#endif 3740#endif
2391 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3741 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2392 backend_poll (EV_A_ waittime); 3742 backend_poll (EV_A_ waittime);
2393 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3743 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2394 3744
3745 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3746
3747 ECB_MEMORY_FENCE_ACQUIRE;
3748 if (pipe_write_skipped)
3749 {
3750 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3751 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3752 }
3753
3754
2395 /* update ev_rt_now, do magic */ 3755 /* update ev_rt_now, do magic */
2396 time_update (EV_A_ waittime + sleeptime); 3756 time_update (EV_A_ waittime + sleeptime);
2397 } 3757 }
2398 3758
2399 /* queue pending timers and reschedule them */ 3759 /* queue pending timers and reschedule them */
… …
2425 loop_done = EVBREAK_CANCEL; 3785 loop_done = EVBREAK_CANCEL;
2426 3786
2427#if EV_FEATURE_API 3787#if EV_FEATURE_API
2428 --loop_depth; 3788 --loop_depth;
2429#endif 3789#endif
2430}
2431 3790
3791 return activecnt;
3792}
3793
2432void 3794void
2433ev_break (EV_P_ int how) 3795ev_break (EV_P_ int how) EV_NOEXCEPT
2434{ 3796{
2435 loop_done = how; 3797 loop_done = how;
2436} 3798}
2437 3799
2438void 3800void
2439ev_ref (EV_P) 3801ev_ref (EV_P) EV_NOEXCEPT
2440{ 3802{
2441 ++activecnt; 3803 ++activecnt;
2442} 3804}
2443 3805
2444void 3806void
2445ev_unref (EV_P) 3807ev_unref (EV_P) EV_NOEXCEPT
2446{ 3808{
2447 --activecnt; 3809 --activecnt;
2448} 3810}
2449 3811
2450void 3812void
2451ev_now_update (EV_P) 3813ev_now_update (EV_P) EV_NOEXCEPT
2452{ 3814{
2453 time_update (EV_A_ 1e100); 3815 time_update (EV_A_ 1e100);
2454} 3816}
2455 3817
2456void 3818void
2457ev_suspend (EV_P) 3819ev_suspend (EV_P) EV_NOEXCEPT
2458{ 3820{
2459 ev_now_update (EV_A); 3821 ev_now_update (EV_A);
2460} 3822}
2461 3823
2462void 3824void
2463ev_resume (EV_P) 3825ev_resume (EV_P) EV_NOEXCEPT
2464{ 3826{
2465 ev_tstamp mn_prev = mn_now; 3827 ev_tstamp mn_prev = mn_now;
2466 3828
2467 ev_now_update (EV_A); 3829 ev_now_update (EV_A);
2468 timers_reschedule (EV_A_ mn_now - mn_prev); 3830 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2507 w->pending = 0; 3869 w->pending = 0;
2508 } 3870 }
2509} 3871}
2510 3872
2511int 3873int
2512ev_clear_pending (EV_P_ void *w) 3874ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2513{ 3875{
2514 W w_ = (W)w; 3876 W w_ = (W)w;
2515 int pending = w_->pending; 3877 int pending = w_->pending;
2516 3878
2517 if (expect_true (pending)) 3879 if (expect_true (pending))
… …
2549 w->active = 0; 3911 w->active = 0;
2550} 3912}
2551 3913
2552/*****************************************************************************/ 3914/*****************************************************************************/
2553 3915
2554void noinline 3916noinline
3917void
2555ev_io_start (EV_P_ ev_io *w) 3918ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2556{ 3919{
2557 int fd = w->fd; 3920 int fd = w->fd;
2558 3921
2559 if (expect_false (ev_is_active (w))) 3922 if (expect_false (ev_is_active (w)))
2560 return; 3923 return;
… …
2563 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 3926 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2564 3927
2565 EV_FREQUENT_CHECK; 3928 EV_FREQUENT_CHECK;
2566 3929
2567 ev_start (EV_A_ (W)w, 1); 3930 ev_start (EV_A_ (W)w, 1);
2568 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3931 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
2569 wlist_add (&anfds[fd].head, (WL)w); 3932 wlist_add (&anfds[fd].head, (WL)w);
3933
3934 /* common bug, apparently */
3935 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
2570 3936
2571 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3937 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2572 w->events &= ~EV__IOFDSET; 3938 w->events &= ~EV__IOFDSET;
2573 3939
2574 EV_FREQUENT_CHECK; 3940 EV_FREQUENT_CHECK;
2575} 3941}
2576 3942
2577void noinline 3943noinline
3944void
2578ev_io_stop (EV_P_ ev_io *w) 3945ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2579{ 3946{
2580 clear_pending (EV_A_ (W)w); 3947 clear_pending (EV_A_ (W)w);
2581 if (expect_false (!ev_is_active (w))) 3948 if (expect_false (!ev_is_active (w)))
2582 return; 3949 return;
2583 3950
… …
2591 fd_change (EV_A_ w->fd, EV_ANFD_REIFY); 3958 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2592 3959
2593 EV_FREQUENT_CHECK; 3960 EV_FREQUENT_CHECK;
2594} 3961}
2595 3962
2596void noinline 3963noinline
3964void
2597ev_timer_start (EV_P_ ev_timer *w) 3965ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2598{ 3966{
2599 if (expect_false (ev_is_active (w))) 3967 if (expect_false (ev_is_active (w)))
2600 return; 3968 return;
2601 3969
2602 ev_at (w) += mn_now; 3970 ev_at (w) += mn_now;
… …
2605 3973
2606 EV_FREQUENT_CHECK; 3974 EV_FREQUENT_CHECK;
2607 3975
2608 ++timercnt; 3976 ++timercnt;
2609 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 3977 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2610 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 3978 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
2611 ANHE_w (timers [ev_active (w)]) = (WT)w; 3979 ANHE_w (timers [ev_active (w)]) = (WT)w;
2612 ANHE_at_cache (timers [ev_active (w)]); 3980 ANHE_at_cache (timers [ev_active (w)]);
2613 upheap (timers, ev_active (w)); 3981 upheap (timers, ev_active (w));
2614 3982
2615 EV_FREQUENT_CHECK; 3983 EV_FREQUENT_CHECK;
2616 3984
2617 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3985 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2618} 3986}
2619 3987
2620void noinline 3988noinline
3989void
2621ev_timer_stop (EV_P_ ev_timer *w) 3990ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2622{ 3991{
2623 clear_pending (EV_A_ (W)w); 3992 clear_pending (EV_A_ (W)w);
2624 if (expect_false (!ev_is_active (w))) 3993 if (expect_false (!ev_is_active (w)))
2625 return; 3994 return;
2626 3995
… …
2645 ev_stop (EV_A_ (W)w); 4014 ev_stop (EV_A_ (W)w);
2646 4015
2647 EV_FREQUENT_CHECK; 4016 EV_FREQUENT_CHECK;
2648} 4017}
2649 4018
2650void noinline 4019noinline
4020void
2651ev_timer_again (EV_P_ ev_timer *w) 4021ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2652{ 4022{
2653 EV_FREQUENT_CHECK; 4023 EV_FREQUENT_CHECK;
4024
4025 clear_pending (EV_A_ (W)w);
2654 4026
2655 if (ev_is_active (w)) 4027 if (ev_is_active (w))
2656 { 4028 {
2657 if (w->repeat) 4029 if (w->repeat)
2658 { 4030 {
… …
2671 4043
2672 EV_FREQUENT_CHECK; 4044 EV_FREQUENT_CHECK;
2673} 4045}
2674 4046
2675ev_tstamp 4047ev_tstamp
2676ev_timer_remaining (EV_P_ ev_timer *w) 4048ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
2677{ 4049{
2678 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 4050 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2679} 4051}
2680 4052
2681#if EV_PERIODIC_ENABLE 4053#if EV_PERIODIC_ENABLE
2682void noinline 4054noinline
4055void
2683ev_periodic_start (EV_P_ ev_periodic *w) 4056ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2684{ 4057{
2685 if (expect_false (ev_is_active (w))) 4058 if (expect_false (ev_is_active (w)))
2686 return; 4059 return;
2687 4060
2688 if (w->reschedule_cb) 4061 if (w->reschedule_cb)
2689 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4062 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2690 else if (w->interval) 4063 else if (w->interval)
2691 { 4064 {
2692 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 4065 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2693 /* this formula differs from the one in periodic_reify because we do not always round up */ 4066 periodic_recalc (EV_A_ w);
2694 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2695 } 4067 }
2696 else 4068 else
2697 ev_at (w) = w->offset; 4069 ev_at (w) = w->offset;
2698 4070
2699 EV_FREQUENT_CHECK; 4071 EV_FREQUENT_CHECK;
2700 4072
2701 ++periodiccnt; 4073 ++periodiccnt;
2702 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); 4074 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2703 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 4075 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
2704 ANHE_w (periodics [ev_active (w)]) = (WT)w; 4076 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2705 ANHE_at_cache (periodics [ev_active (w)]); 4077 ANHE_at_cache (periodics [ev_active (w)]);
2706 upheap (periodics, ev_active (w)); 4078 upheap (periodics, ev_active (w));
2707 4079
2708 EV_FREQUENT_CHECK; 4080 EV_FREQUENT_CHECK;
2709 4081
2710 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4082 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2711} 4083}
2712 4084
2713void noinline 4085noinline
4086void
2714ev_periodic_stop (EV_P_ ev_periodic *w) 4087ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2715{ 4088{
2716 clear_pending (EV_A_ (W)w); 4089 clear_pending (EV_A_ (W)w);
2717 if (expect_false (!ev_is_active (w))) 4090 if (expect_false (!ev_is_active (w)))
2718 return; 4091 return;
2719 4092
… …
2736 ev_stop (EV_A_ (W)w); 4109 ev_stop (EV_A_ (W)w);
2737 4110
2738 EV_FREQUENT_CHECK; 4111 EV_FREQUENT_CHECK;
2739} 4112}
2740 4113
2741void noinline 4114noinline
4115void
2742ev_periodic_again (EV_P_ ev_periodic *w) 4116ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2743{ 4117{
2744 /* TODO: use adjustheap and recalculation */ 4118 /* TODO: use adjustheap and recalculation */
2745 ev_periodic_stop (EV_A_ w); 4119 ev_periodic_stop (EV_A_ w);
2746 ev_periodic_start (EV_A_ w); 4120 ev_periodic_start (EV_A_ w);
2747} 4121}
… …
2751# define SA_RESTART 0 4125# define SA_RESTART 0
2752#endif 4126#endif
2753 4127
2754#if EV_SIGNAL_ENABLE 4128#if EV_SIGNAL_ENABLE
2755 4129
2756void noinline 4130noinline
4131void
2757ev_signal_start (EV_P_ ev_signal *w) 4132ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2758{ 4133{
2759 if (expect_false (ev_is_active (w))) 4134 if (expect_false (ev_is_active (w)))
2760 return; 4135 return;
2761 4136
2762 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 4137 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2764#if EV_MULTIPLICITY 4139#if EV_MULTIPLICITY
2765 assert (("libev: a signal must not be attached to two different loops", 4140 assert (("libev: a signal must not be attached to two different loops",
2766 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4141 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2767 4142
2768 signals [w->signum - 1].loop = EV_A; 4143 signals [w->signum - 1].loop = EV_A;
4144 ECB_MEMORY_FENCE_RELEASE;
2769#endif 4145#endif
2770 4146
2771 EV_FREQUENT_CHECK; 4147 EV_FREQUENT_CHECK;
2772 4148
2773#if EV_USE_SIGNALFD 4149#if EV_USE_SIGNALFD
… …
2820 sa.sa_handler = ev_sighandler; 4196 sa.sa_handler = ev_sighandler;
2821 sigfillset (&sa.sa_mask); 4197 sigfillset (&sa.sa_mask);
2822 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4198 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2823 sigaction (w->signum, &sa, 0); 4199 sigaction (w->signum, &sa, 0);
2824 4200
4201 if (origflags & EVFLAG_NOSIGMASK)
4202 {
2825 sigemptyset (&sa.sa_mask); 4203 sigemptyset (&sa.sa_mask);
2826 sigaddset (&sa.sa_mask, w->signum); 4204 sigaddset (&sa.sa_mask, w->signum);
2827 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 4205 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4206 }
2828#endif 4207#endif
2829 } 4208 }
2830 4209
2831 EV_FREQUENT_CHECK; 4210 EV_FREQUENT_CHECK;
2832} 4211}
2833 4212
2834void noinline 4213noinline
4214void
2835ev_signal_stop (EV_P_ ev_signal *w) 4215ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
2836{ 4216{
2837 clear_pending (EV_A_ (W)w); 4217 clear_pending (EV_A_ (W)w);
2838 if (expect_false (!ev_is_active (w))) 4218 if (expect_false (!ev_is_active (w)))
2839 return; 4219 return;
2840 4220
… …
2871#endif 4251#endif
2872 4252
2873#if EV_CHILD_ENABLE 4253#if EV_CHILD_ENABLE
2874 4254
2875void 4255void
2876ev_child_start (EV_P_ ev_child *w) 4256ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
2877{ 4257{
2878#if EV_MULTIPLICITY 4258#if EV_MULTIPLICITY
2879 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4259 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2880#endif 4260#endif
2881 if (expect_false (ev_is_active (w))) 4261 if (expect_false (ev_is_active (w)))
… …
2888 4268
2889 EV_FREQUENT_CHECK; 4269 EV_FREQUENT_CHECK;
2890} 4270}
2891 4271
2892void 4272void
2893ev_child_stop (EV_P_ ev_child *w) 4273ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
2894{ 4274{
2895 clear_pending (EV_A_ (W)w); 4275 clear_pending (EV_A_ (W)w);
2896 if (expect_false (!ev_is_active (w))) 4276 if (expect_false (!ev_is_active (w)))
2897 return; 4277 return;
2898 4278
… …
2915 4295
2916#define DEF_STAT_INTERVAL 5.0074891 4296#define DEF_STAT_INTERVAL 5.0074891
2917#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4297#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2918#define MIN_STAT_INTERVAL 0.1074891 4298#define MIN_STAT_INTERVAL 0.1074891
2919 4299
2920static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4300noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2921 4301
2922#if EV_USE_INOTIFY 4302#if EV_USE_INOTIFY
2923 4303
2924/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ 4304/* 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) 4305# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2926 4306
2927static void noinline 4307noinline
4308static void
2928infy_add (EV_P_ ev_stat *w) 4309infy_add (EV_P_ ev_stat *w)
2929{ 4310{
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); 4311 w->wd = inotify_add_watch (fs_fd, w->path,
4312 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4313 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4314 | IN_DONT_FOLLOW | IN_MASK_ADD);
2931 4315
2932 if (w->wd >= 0) 4316 if (w->wd >= 0)
2933 { 4317 {
2934 struct statfs sfs; 4318 struct statfs sfs;
2935 4319
… …
2939 4323
2940 if (!fs_2625) 4324 if (!fs_2625)
2941 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4325 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2942 else if (!statfs (w->path, &sfs) 4326 else if (!statfs (w->path, &sfs)
2943 && (sfs.f_type == 0x1373 /* devfs */ 4327 && (sfs.f_type == 0x1373 /* devfs */
4328 || sfs.f_type == 0x4006 /* fat */
4329 || sfs.f_type == 0x4d44 /* msdos */
2944 || sfs.f_type == 0xEF53 /* ext2/3 */ 4330 || sfs.f_type == 0xEF53 /* ext2/3 */
4331 || sfs.f_type == 0x72b6 /* jffs2 */
4332 || sfs.f_type == 0x858458f6 /* ramfs */
4333 || sfs.f_type == 0x5346544e /* ntfs */
2945 || sfs.f_type == 0x3153464a /* jfs */ 4334 || sfs.f_type == 0x3153464a /* jfs */
4335 || sfs.f_type == 0x9123683e /* btrfs */
2946 || sfs.f_type == 0x52654973 /* reiser3 */ 4336 || sfs.f_type == 0x52654973 /* reiser3 */
2947 || sfs.f_type == 0x01021994 /* tempfs */ 4337 || sfs.f_type == 0x01021994 /* tmpfs */
2948 || sfs.f_type == 0x58465342 /* xfs */)) 4338 || sfs.f_type == 0x58465342 /* xfs */))
2949 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4339 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
2950 else 4340 else
2951 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4341 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
2952 } 4342 }
… …
2973 if (!pend || pend == path) 4363 if (!pend || pend == path)
2974 break; 4364 break;
2975 4365
2976 *pend = 0; 4366 *pend = 0;
2977 w->wd = inotify_add_watch (fs_fd, path, mask); 4367 w->wd = inotify_add_watch (fs_fd, path, mask);
2978 } 4368 }
2979 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4369 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
2980 } 4370 }
2981 } 4371 }
2982 4372
2983 if (w->wd >= 0) 4373 if (w->wd >= 0)
… …
2987 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4377 if (ev_is_active (&w->timer)) ev_ref (EV_A);
2988 ev_timer_again (EV_A_ &w->timer); 4378 ev_timer_again (EV_A_ &w->timer);
2989 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4379 if (ev_is_active (&w->timer)) ev_unref (EV_A);
2990} 4380}
2991 4381
2992static void noinline 4382noinline
4383static void
2993infy_del (EV_P_ ev_stat *w) 4384infy_del (EV_P_ ev_stat *w)
2994{ 4385{
2995 int slot; 4386 int slot;
2996 int wd = w->wd; 4387 int wd = w->wd;
2997 4388
… …
3004 4395
3005 /* remove this watcher, if others are watching it, they will rearm */ 4396 /* remove this watcher, if others are watching it, they will rearm */
3006 inotify_rm_watch (fs_fd, wd); 4397 inotify_rm_watch (fs_fd, wd);
3007} 4398}
3008 4399
3009static void noinline 4400noinline
4401static void
3010infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4402infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3011{ 4403{
3012 if (slot < 0) 4404 if (slot < 0)
3013 /* overflow, need to check for all hash slots */ 4405 /* overflow, need to check for all hash slots */
3014 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) 4406 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
… …
3050 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4442 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3051 ofs += sizeof (struct inotify_event) + ev->len; 4443 ofs += sizeof (struct inotify_event) + ev->len;
3052 } 4444 }
3053} 4445}
3054 4446
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 4447inline_size ecb_cold
4448void
3088ev_check_2625 (EV_P) 4449ev_check_2625 (EV_P)
3089{ 4450{
3090 /* kernels < 2.6.25 are borked 4451 /* kernels < 2.6.25 are borked
3091 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4452 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3092 */ 4453 */
… …
3097} 4458}
3098 4459
3099inline_size int 4460inline_size int
3100infy_newfd (void) 4461infy_newfd (void)
3101{ 4462{
3102#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4463#if defined IN_CLOEXEC && defined IN_NONBLOCK
3103 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4464 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3104 if (fd >= 0) 4465 if (fd >= 0)
3105 return fd; 4466 return fd;
3106#endif 4467#endif
3107 return inotify_init (); 4468 return inotify_init ();
… …
3182#else 4543#else
3183# define EV_LSTAT(p,b) lstat (p, b) 4544# define EV_LSTAT(p,b) lstat (p, b)
3184#endif 4545#endif
3185 4546
3186void 4547void
3187ev_stat_stat (EV_P_ ev_stat *w) 4548ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
3188{ 4549{
3189 if (lstat (w->path, &w->attr) < 0) 4550 if (lstat (w->path, &w->attr) < 0)
3190 w->attr.st_nlink = 0; 4551 w->attr.st_nlink = 0;
3191 else if (!w->attr.st_nlink) 4552 else if (!w->attr.st_nlink)
3192 w->attr.st_nlink = 1; 4553 w->attr.st_nlink = 1;
3193} 4554}
3194 4555
3195static void noinline 4556noinline
4557static void
3196stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4558stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3197{ 4559{
3198 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4560 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3199 4561
3200 ev_statdata prev = w->attr; 4562 ev_statdata prev = w->attr;
… …
3231 ev_feed_event (EV_A_ w, EV_STAT); 4593 ev_feed_event (EV_A_ w, EV_STAT);
3232 } 4594 }
3233} 4595}
3234 4596
3235void 4597void
3236ev_stat_start (EV_P_ ev_stat *w) 4598ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
3237{ 4599{
3238 if (expect_false (ev_is_active (w))) 4600 if (expect_false (ev_is_active (w)))
3239 return; 4601 return;
3240 4602
3241 ev_stat_stat (EV_A_ w); 4603 ev_stat_stat (EV_A_ w);
… …
3262 4624
3263 EV_FREQUENT_CHECK; 4625 EV_FREQUENT_CHECK;
3264} 4626}
3265 4627
3266void 4628void
3267ev_stat_stop (EV_P_ ev_stat *w) 4629ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
3268{ 4630{
3269 clear_pending (EV_A_ (W)w); 4631 clear_pending (EV_A_ (W)w);
3270 if (expect_false (!ev_is_active (w))) 4632 if (expect_false (!ev_is_active (w)))
3271 return; 4633 return;
3272 4634
… …
3288} 4650}
3289#endif 4651#endif
3290 4652
3291#if EV_IDLE_ENABLE 4653#if EV_IDLE_ENABLE
3292void 4654void
3293ev_idle_start (EV_P_ ev_idle *w) 4655ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
3294{ 4656{
3295 if (expect_false (ev_is_active (w))) 4657 if (expect_false (ev_is_active (w)))
3296 return; 4658 return;
3297 4659
3298 pri_adjust (EV_A_ (W)w); 4660 pri_adjust (EV_A_ (W)w);
… …
3303 int active = ++idlecnt [ABSPRI (w)]; 4665 int active = ++idlecnt [ABSPRI (w)];
3304 4666
3305 ++idleall; 4667 ++idleall;
3306 ev_start (EV_A_ (W)w, active); 4668 ev_start (EV_A_ (W)w, active);
3307 4669
3308 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4670 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
3309 idles [ABSPRI (w)][active - 1] = w; 4671 idles [ABSPRI (w)][active - 1] = w;
3310 } 4672 }
3311 4673
3312 EV_FREQUENT_CHECK; 4674 EV_FREQUENT_CHECK;
3313} 4675}
3314 4676
3315void 4677void
3316ev_idle_stop (EV_P_ ev_idle *w) 4678ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
3317{ 4679{
3318 clear_pending (EV_A_ (W)w); 4680 clear_pending (EV_A_ (W)w);
3319 if (expect_false (!ev_is_active (w))) 4681 if (expect_false (!ev_is_active (w)))
3320 return; 4682 return;
3321 4683
… …
3335} 4697}
3336#endif 4698#endif
3337 4699
3338#if EV_PREPARE_ENABLE 4700#if EV_PREPARE_ENABLE
3339void 4701void
3340ev_prepare_start (EV_P_ ev_prepare *w) 4702ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3341{ 4703{
3342 if (expect_false (ev_is_active (w))) 4704 if (expect_false (ev_is_active (w)))
3343 return; 4705 return;
3344 4706
3345 EV_FREQUENT_CHECK; 4707 EV_FREQUENT_CHECK;
3346 4708
3347 ev_start (EV_A_ (W)w, ++preparecnt); 4709 ev_start (EV_A_ (W)w, ++preparecnt);
3348 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4710 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
3349 prepares [preparecnt - 1] = w; 4711 prepares [preparecnt - 1] = w;
3350 4712
3351 EV_FREQUENT_CHECK; 4713 EV_FREQUENT_CHECK;
3352} 4714}
3353 4715
3354void 4716void
3355ev_prepare_stop (EV_P_ ev_prepare *w) 4717ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3356{ 4718{
3357 clear_pending (EV_A_ (W)w); 4719 clear_pending (EV_A_ (W)w);
3358 if (expect_false (!ev_is_active (w))) 4720 if (expect_false (!ev_is_active (w)))
3359 return; 4721 return;
3360 4722
… …
3373} 4735}
3374#endif 4736#endif
3375 4737
3376#if EV_CHECK_ENABLE 4738#if EV_CHECK_ENABLE
3377void 4739void
3378ev_check_start (EV_P_ ev_check *w) 4740ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3379{ 4741{
3380 if (expect_false (ev_is_active (w))) 4742 if (expect_false (ev_is_active (w)))
3381 return; 4743 return;
3382 4744
3383 EV_FREQUENT_CHECK; 4745 EV_FREQUENT_CHECK;
3384 4746
3385 ev_start (EV_A_ (W)w, ++checkcnt); 4747 ev_start (EV_A_ (W)w, ++checkcnt);
3386 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4748 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
3387 checks [checkcnt - 1] = w; 4749 checks [checkcnt - 1] = w;
3388 4750
3389 EV_FREQUENT_CHECK; 4751 EV_FREQUENT_CHECK;
3390} 4752}
3391 4753
3392void 4754void
3393ev_check_stop (EV_P_ ev_check *w) 4755ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3394{ 4756{
3395 clear_pending (EV_A_ (W)w); 4757 clear_pending (EV_A_ (W)w);
3396 if (expect_false (!ev_is_active (w))) 4758 if (expect_false (!ev_is_active (w)))
3397 return; 4759 return;
3398 4760
… …
3410 EV_FREQUENT_CHECK; 4772 EV_FREQUENT_CHECK;
3411} 4773}
3412#endif 4774#endif
3413 4775
3414#if EV_EMBED_ENABLE 4776#if EV_EMBED_ENABLE
3415void noinline 4777noinline
4778void
3416ev_embed_sweep (EV_P_ ev_embed *w) 4779ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3417{ 4780{
3418 ev_run (w->other, EVRUN_NOWAIT); 4781 ev_run (w->other, EVRUN_NOWAIT);
3419} 4782}
3420 4783
3421static void 4784static void
… …
3469 ev_idle_stop (EV_A_ idle); 4832 ev_idle_stop (EV_A_ idle);
3470} 4833}
3471#endif 4834#endif
3472 4835
3473void 4836void
3474ev_embed_start (EV_P_ ev_embed *w) 4837ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
3475{ 4838{
3476 if (expect_false (ev_is_active (w))) 4839 if (expect_false (ev_is_active (w)))
3477 return; 4840 return;
3478 4841
3479 { 4842 {
… …
3500 4863
3501 EV_FREQUENT_CHECK; 4864 EV_FREQUENT_CHECK;
3502} 4865}
3503 4866
3504void 4867void
3505ev_embed_stop (EV_P_ ev_embed *w) 4868ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3506{ 4869{
3507 clear_pending (EV_A_ (W)w); 4870 clear_pending (EV_A_ (W)w);
3508 if (expect_false (!ev_is_active (w))) 4871 if (expect_false (!ev_is_active (w)))
3509 return; 4872 return;
3510 4873
… …
3520} 4883}
3521#endif 4884#endif
3522 4885
3523#if EV_FORK_ENABLE 4886#if EV_FORK_ENABLE
3524void 4887void
3525ev_fork_start (EV_P_ ev_fork *w) 4888ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3526{ 4889{
3527 if (expect_false (ev_is_active (w))) 4890 if (expect_false (ev_is_active (w)))
3528 return; 4891 return;
3529 4892
3530 EV_FREQUENT_CHECK; 4893 EV_FREQUENT_CHECK;
3531 4894
3532 ev_start (EV_A_ (W)w, ++forkcnt); 4895 ev_start (EV_A_ (W)w, ++forkcnt);
3533 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4896 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
3534 forks [forkcnt - 1] = w; 4897 forks [forkcnt - 1] = w;
3535 4898
3536 EV_FREQUENT_CHECK; 4899 EV_FREQUENT_CHECK;
3537} 4900}
3538 4901
3539void 4902void
3540ev_fork_stop (EV_P_ ev_fork *w) 4903ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3541{ 4904{
3542 clear_pending (EV_A_ (W)w); 4905 clear_pending (EV_A_ (W)w);
3543 if (expect_false (!ev_is_active (w))) 4906 if (expect_false (!ev_is_active (w)))
3544 return; 4907 return;
3545 4908
… …
3556 4919
3557 EV_FREQUENT_CHECK; 4920 EV_FREQUENT_CHECK;
3558} 4921}
3559#endif 4922#endif
3560 4923
3561#if EV_ASYNC_ENABLE 4924#if EV_CLEANUP_ENABLE
3562void 4925void
3563ev_async_start (EV_P_ ev_async *w) 4926ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3564{ 4927{
3565 if (expect_false (ev_is_active (w))) 4928 if (expect_false (ev_is_active (w)))
3566 return; 4929 return;
3567 4930
3568 w->sent = 0;
3569
3570 evpipe_init (EV_A);
3571
3572 EV_FREQUENT_CHECK; 4931 EV_FREQUENT_CHECK;
3573 4932
3574 ev_start (EV_A_ (W)w, ++asynccnt); 4933 ev_start (EV_A_ (W)w, ++cleanupcnt);
3575 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 4934 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
3576 asyncs [asynccnt - 1] = w; 4935 cleanups [cleanupcnt - 1] = w;
3577 4936
4937 /* cleanup watchers should never keep a refcount on the loop */
4938 ev_unref (EV_A);
3578 EV_FREQUENT_CHECK; 4939 EV_FREQUENT_CHECK;
3579} 4940}
3580 4941
3581void 4942void
3582ev_async_stop (EV_P_ ev_async *w) 4943ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3583{ 4944{
3584 clear_pending (EV_A_ (W)w); 4945 clear_pending (EV_A_ (W)w);
3585 if (expect_false (!ev_is_active (w))) 4946 if (expect_false (!ev_is_active (w)))
3586 return; 4947 return;
3587 4948
3588 EV_FREQUENT_CHECK; 4949 EV_FREQUENT_CHECK;
4950 ev_ref (EV_A);
4951
4952 {
4953 int active = ev_active (w);
4954
4955 cleanups [active - 1] = cleanups [--cleanupcnt];
4956 ev_active (cleanups [active - 1]) = active;
4957 }
4958
4959 ev_stop (EV_A_ (W)w);
4960
4961 EV_FREQUENT_CHECK;
4962}
4963#endif
4964
4965#if EV_ASYNC_ENABLE
4966void
4967ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
4968{
4969 if (expect_false (ev_is_active (w)))
4970 return;
4971
4972 w->sent = 0;
4973
4974 evpipe_init (EV_A);
4975
4976 EV_FREQUENT_CHECK;
4977
4978 ev_start (EV_A_ (W)w, ++asynccnt);
4979 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
4980 asyncs [asynccnt - 1] = w;
4981
4982 EV_FREQUENT_CHECK;
4983}
4984
4985void
4986ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
4987{
4988 clear_pending (EV_A_ (W)w);
4989 if (expect_false (!ev_is_active (w)))
4990 return;
4991
4992 EV_FREQUENT_CHECK;
3589 4993
3590 { 4994 {
3591 int active = ev_active (w); 4995 int active = ev_active (w);
3592 4996
3593 asyncs [active - 1] = asyncs [--asynccnt]; 4997 asyncs [active - 1] = asyncs [--asynccnt];
… …
3598 5002
3599 EV_FREQUENT_CHECK; 5003 EV_FREQUENT_CHECK;
3600} 5004}
3601 5005
3602void 5006void
3603ev_async_send (EV_P_ ev_async *w) 5007ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3604{ 5008{
3605 w->sent = 1; 5009 w->sent = 1;
3606 evpipe_write (EV_A_ &async_pending); 5010 evpipe_write (EV_A_ &async_pending);
3607} 5011}
3608#endif 5012#endif
… …
3645 5049
3646 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 5050 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3647} 5051}
3648 5052
3649void 5053void
3650ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5054ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
3651{ 5055{
3652 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5056 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3653
3654 if (expect_false (!once))
3655 {
3656 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3657 return;
3658 }
3659 5057
3660 once->cb = cb; 5058 once->cb = cb;
3661 once->arg = arg; 5059 once->arg = arg;
3662 5060
3663 ev_init (&once->io, once_cb_io); 5061 ev_init (&once->io, once_cb_io);
… …
3676} 5074}
3677 5075
3678/*****************************************************************************/ 5076/*****************************************************************************/
3679 5077
3680#if EV_WALK_ENABLE 5078#if EV_WALK_ENABLE
5079ecb_cold
3681void 5080void
3682ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 5081ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
3683{ 5082{
3684 int i, j; 5083 int i, j;
3685 ev_watcher_list *wl, *wn; 5084 ev_watcher_list *wl, *wn;
3686 5085
3687 if (types & (EV_IO | EV_EMBED)) 5086 if (types & (EV_IO | EV_EMBED))
… …
3730 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5129 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3731#endif 5130#endif
3732 5131
3733#if EV_IDLE_ENABLE 5132#if EV_IDLE_ENABLE
3734 if (types & EV_IDLE) 5133 if (types & EV_IDLE)
3735 for (j = NUMPRI; i--; ) 5134 for (j = NUMPRI; j--; )
3736 for (i = idlecnt [j]; i--; ) 5135 for (i = idlecnt [j]; i--; )
3737 cb (EV_A_ EV_IDLE, idles [j][i]); 5136 cb (EV_A_ EV_IDLE, idles [j][i]);
3738#endif 5137#endif
3739 5138
3740#if EV_FORK_ENABLE 5139#if EV_FORK_ENABLE
… …
3793 5192
3794#if EV_MULTIPLICITY 5193#if EV_MULTIPLICITY
3795 #include "ev_wrap.h" 5194 #include "ev_wrap.h"
3796#endif 5195#endif
3797 5196
3798EV_CPP(})
3799

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