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Comparing libev/ev.c (file contents):
Revision 1.357 by root, Sat Oct 23 22:25:44 2010 UTC vs.
Revision 1.493 by root, Sun Jun 23 02:02:24 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>
438# endif
439#endif
440
441#if EV_USE_LINUXAIO
442# include <sys/syscall.h>
443# if !SYS_io_getevents || !EV_USE_EPOLL
444# undef EV_USE_LINUXAIO
445# define EV_USE_LINUXAIO 0
383# endif 446# endif
384#endif 447#endif
385 448
386#if EV_USE_INOTIFY 449#if EV_USE_INOTIFY
387# include <sys/statfs.h> 450# include <sys/statfs.h>
… …
389/* 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 */
390# ifndef IN_DONT_FOLLOW 453# ifndef IN_DONT_FOLLOW
391# undef EV_USE_INOTIFY 454# undef EV_USE_INOTIFY
392# define EV_USE_INOTIFY 0 455# define EV_USE_INOTIFY 0
393# endif 456# endif
394#endif
395
396#if EV_SELECT_IS_WINSOCKET
397# include <winsock.h>
398#endif 457#endif
399 458
400#if EV_USE_EVENTFD 459#if EV_USE_EVENTFD
401/* 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 */
402# include <stdint.h> 461# include <stdint.h>
… …
442#else 501#else
443# define EV_FREQUENT_CHECK do { } while (0) 502# define EV_FREQUENT_CHECK do { } while (0)
444#endif 503#endif
445 504
446/* 505/*
447 * This is used to avoid floating point rounding problems. 506 * This is used to work around floating point rounding problems.
448 * It is added to ev_rt_now when scheduling periodics
449 * to ensure progress, time-wise, even when rounding
450 * errors are against us.
451 * This value is good at least till the year 4000. 507 * This value is good at least till the year 4000.
452 * Better solutions welcome.
453 */ 508 */
454#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 */
455 511
456#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) */
457#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) */
458 514
459#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)
460#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)
461 517
518/* the following is ecb.h embedded into libev - use update_ev_c to update from an external copy */
519/* ECB.H BEGIN */
520/*
521 * libecb - http://software.schmorp.de/pkg/libecb
522 *
523 * Copyright (©) 2009-2015 Marc Alexander Lehmann <libecb@schmorp.de>
524 * Copyright (©) 2011 Emanuele Giaquinta
525 * All rights reserved.
526 *
527 * Redistribution and use in source and binary forms, with or without modifica-
528 * tion, are permitted provided that the following conditions are met:
529 *
530 * 1. Redistributions of source code must retain the above copyright notice,
531 * this list of conditions and the following disclaimer.
532 *
533 * 2. Redistributions in binary form must reproduce the above copyright
534 * notice, this list of conditions and the following disclaimer in the
535 * documentation and/or other materials provided with the distribution.
536 *
537 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
538 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
539 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
540 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
541 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
542 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
543 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
544 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
545 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
546 * OF THE POSSIBILITY OF SUCH DAMAGE.
547 *
548 * Alternatively, the contents of this file may be used under the terms of
549 * the GNU General Public License ("GPL") version 2 or any later version,
550 * in which case the provisions of the GPL are applicable instead of
551 * the above. If you wish to allow the use of your version of this file
552 * only under the terms of the GPL and not to allow others to use your
553 * version of this file under the BSD license, indicate your decision
554 * by deleting the provisions above and replace them with the notice
555 * and other provisions required by the GPL. If you do not delete the
556 * provisions above, a recipient may use your version of this file under
557 * either the BSD or the GPL.
558 */
559
560#ifndef ECB_H
561#define ECB_H
562
563/* 16 bits major, 16 bits minor */
564#define ECB_VERSION 0x00010005
565
566#ifdef _WIN32
567 typedef signed char int8_t;
568 typedef unsigned char uint8_t;
569 typedef signed short int16_t;
570 typedef unsigned short uint16_t;
571 typedef signed int int32_t;
572 typedef unsigned int uint32_t;
462#if __GNUC__ >= 4 573 #if __GNUC__
574 typedef signed long long int64_t;
575 typedef unsigned long long uint64_t;
576 #else /* _MSC_VER || __BORLANDC__ */
577 typedef signed __int64 int64_t;
578 typedef unsigned __int64 uint64_t;
579 #endif
580 #ifdef _WIN64
581 #define ECB_PTRSIZE 8
582 typedef uint64_t uintptr_t;
583 typedef int64_t intptr_t;
584 #else
585 #define ECB_PTRSIZE 4
586 typedef uint32_t uintptr_t;
587 typedef int32_t intptr_t;
588 #endif
589#else
590 #include <inttypes.h>
591 #if (defined INTPTR_MAX ? INTPTR_MAX : ULONG_MAX) > 0xffffffffU
592 #define ECB_PTRSIZE 8
593 #else
594 #define ECB_PTRSIZE 4
595 #endif
596#endif
597
598#define ECB_GCC_AMD64 (__amd64 || __amd64__ || __x86_64 || __x86_64__)
599#define ECB_MSVC_AMD64 (_M_AMD64 || _M_X64)
600
601/* work around x32 idiocy by defining proper macros */
602#if ECB_GCC_AMD64 || ECB_MSVC_AMD64
603 #if _ILP32
604 #define ECB_AMD64_X32 1
605 #else
606 #define ECB_AMD64 1
607 #endif
608#endif
609
610/* many compilers define _GNUC_ to some versions but then only implement
611 * what their idiot authors think are the "more important" extensions,
612 * causing enormous grief in return for some better fake benchmark numbers.
613 * or so.
614 * we try to detect these and simply assume they are not gcc - if they have
615 * an issue with that they should have done it right in the first place.
616 */
617#if !defined __GNUC_MINOR__ || defined __INTEL_COMPILER || defined __SUNPRO_C || defined __SUNPRO_CC || defined __llvm__ || defined __clang__
618 #define ECB_GCC_VERSION(major,minor) 0
619#else
620 #define ECB_GCC_VERSION(major,minor) (__GNUC__ > (major) || (__GNUC__ == (major) && __GNUC_MINOR__ >= (minor)))
621#endif
622
623#define ECB_CLANG_VERSION(major,minor) (__clang_major__ > (major) || (__clang_major__ == (major) && __clang_minor__ >= (minor)))
624
625#if __clang__ && defined __has_builtin
626 #define ECB_CLANG_BUILTIN(x) __has_builtin (x)
627#else
628 #define ECB_CLANG_BUILTIN(x) 0
629#endif
630
631#if __clang__ && defined __has_extension
632 #define ECB_CLANG_EXTENSION(x) __has_extension (x)
633#else
634 #define ECB_CLANG_EXTENSION(x) 0
635#endif
636
637#define ECB_CPP (__cplusplus+0)
638#define ECB_CPP11 (__cplusplus >= 201103L)
639#define ECB_CPP14 (__cplusplus >= 201402L)
640#define ECB_CPP17 (__cplusplus >= 201703L)
641
642#if ECB_CPP
643 #define ECB_C 0
644 #define ECB_STDC_VERSION 0
645#else
646 #define ECB_C 1
647 #define ECB_STDC_VERSION __STDC_VERSION__
648#endif
649
650#define ECB_C99 (ECB_STDC_VERSION >= 199901L)
651#define ECB_C11 (ECB_STDC_VERSION >= 201112L)
652#define ECB_C17 (ECB_STDC_VERSION >= 201710L)
653
654#if ECB_CPP
655 #define ECB_EXTERN_C extern "C"
656 #define ECB_EXTERN_C_BEG ECB_EXTERN_C {
657 #define ECB_EXTERN_C_END }
658#else
659 #define ECB_EXTERN_C extern
660 #define ECB_EXTERN_C_BEG
661 #define ECB_EXTERN_C_END
662#endif
663
664/*****************************************************************************/
665
666/* ECB_NO_THREADS - ecb is not used by multiple threads, ever */
667/* ECB_NO_SMP - ecb might be used in multiple threads, but only on a single cpu */
668
669#if ECB_NO_THREADS
670 #define ECB_NO_SMP 1
671#endif
672
673#if ECB_NO_SMP
674 #define ECB_MEMORY_FENCE do { } while (0)
675#endif
676
677/* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/compiler_ref/compiler_builtins.html */
678#if __xlC__ && ECB_CPP
679 #include <builtins.h>
680#endif
681
682#if 1400 <= _MSC_VER
683 #include <intrin.h> /* fence functions _ReadBarrier, also bit search functions _BitScanReverse */
684#endif
685
686#ifndef ECB_MEMORY_FENCE
687 #if ECB_GCC_VERSION(2,5) || defined __INTEL_COMPILER || (__llvm__ && __GNUC__) || __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
688 #if __i386 || __i386__
689 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("lock; orb $0, -1(%%esp)" : : : "memory")
690 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
691 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
692 #elif ECB_GCC_AMD64
693 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mfence" : : : "memory")
694 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("" : : : "memory")
695 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("" : : : "memory")
696 #elif __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__
697 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("sync" : : : "memory")
698 #elif defined __ARM_ARCH_2__ \
699 || defined __ARM_ARCH_3__ || defined __ARM_ARCH_3M__ \
700 || defined __ARM_ARCH_4__ || defined __ARM_ARCH_4T__ \
701 || defined __ARM_ARCH_5__ || defined __ARM_ARCH_5E__ \
702 || defined __ARM_ARCH_5T__ || defined __ARM_ARCH_5TE__ \
703 || defined __ARM_ARCH_5TEJ__
704 /* should not need any, unless running old code on newer cpu - arm doesn't support that */
705 #elif defined __ARM_ARCH_6__ || defined __ARM_ARCH_6J__ \
706 || defined __ARM_ARCH_6K__ || defined __ARM_ARCH_6ZK__ \
707 || defined __ARM_ARCH_6T2__
708 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mcr p15,0,%0,c7,c10,5" : : "r" (0) : "memory")
709 #elif defined __ARM_ARCH_7__ || defined __ARM_ARCH_7A__ \
710 || defined __ARM_ARCH_7R__ || defined __ARM_ARCH_7M__
711 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb" : : : "memory")
712 #elif __aarch64__
713 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("dmb ish" : : : "memory")
714 #elif (__sparc || __sparc__) && !(__sparc_v8__ || defined __sparcv8)
715 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad | #StoreStore | #StoreLoad" : : : "memory")
716 #define ECB_MEMORY_FENCE_ACQUIRE __asm__ __volatile__ ("membar #LoadStore | #LoadLoad" : : : "memory")
717 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("membar #LoadStore | #StoreStore")
718 #elif defined __s390__ || defined __s390x__
719 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("bcr 15,0" : : : "memory")
720 #elif defined __mips__
721 /* GNU/Linux emulates sync on mips1 architectures, so we force its use */
722 /* anybody else who still uses mips1 is supposed to send in their version, with detection code. */
723 #define ECB_MEMORY_FENCE __asm__ __volatile__ (".set mips2; sync; .set mips0" : : : "memory")
724 #elif defined __alpha__
725 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mb" : : : "memory")
726 #elif defined __hppa__
727 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
728 #define ECB_MEMORY_FENCE_RELEASE __asm__ __volatile__ ("")
729 #elif defined __ia64__
730 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("mf" : : : "memory")
731 #elif defined __m68k__
732 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
733 #elif defined __m88k__
734 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("tb1 0,%%r0,128" : : : "memory")
735 #elif defined __sh__
736 #define ECB_MEMORY_FENCE __asm__ __volatile__ ("" : : : "memory")
737 #endif
738 #endif
739#endif
740
741#ifndef ECB_MEMORY_FENCE
742 #if ECB_GCC_VERSION(4,7)
743 /* see comment below (stdatomic.h) about the C11 memory model. */
744 #define ECB_MEMORY_FENCE __atomic_thread_fence (__ATOMIC_SEQ_CST)
745 #define ECB_MEMORY_FENCE_ACQUIRE __atomic_thread_fence (__ATOMIC_ACQUIRE)
746 #define ECB_MEMORY_FENCE_RELEASE __atomic_thread_fence (__ATOMIC_RELEASE)
747
748 #elif ECB_CLANG_EXTENSION(c_atomic)
749 /* see comment below (stdatomic.h) about the C11 memory model. */
750 #define ECB_MEMORY_FENCE __c11_atomic_thread_fence (__ATOMIC_SEQ_CST)
751 #define ECB_MEMORY_FENCE_ACQUIRE __c11_atomic_thread_fence (__ATOMIC_ACQUIRE)
752 #define ECB_MEMORY_FENCE_RELEASE __c11_atomic_thread_fence (__ATOMIC_RELEASE)
753
754 #elif ECB_GCC_VERSION(4,4) || defined __INTEL_COMPILER || defined __clang__
755 #define ECB_MEMORY_FENCE __sync_synchronize ()
756 #elif _MSC_VER >= 1500 /* VC++ 2008 */
757 /* apparently, microsoft broke all the memory barrier stuff in Visual Studio 2008... */
758 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
759 #define ECB_MEMORY_FENCE _ReadWriteBarrier (); MemoryBarrier()
760 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier (); MemoryBarrier() /* according to msdn, _ReadBarrier is not a load fence */
761 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier (); MemoryBarrier()
762 #elif _MSC_VER >= 1400 /* VC++ 2005 */
763 #pragma intrinsic(_ReadBarrier,_WriteBarrier,_ReadWriteBarrier)
764 #define ECB_MEMORY_FENCE _ReadWriteBarrier ()
765 #define ECB_MEMORY_FENCE_ACQUIRE _ReadWriteBarrier () /* according to msdn, _ReadBarrier is not a load fence */
766 #define ECB_MEMORY_FENCE_RELEASE _WriteBarrier ()
767 #elif defined _WIN32
768 #include <WinNT.h>
769 #define ECB_MEMORY_FENCE MemoryBarrier () /* actually just xchg on x86... scary */
770 #elif __SUNPRO_C >= 0x5110 || __SUNPRO_CC >= 0x5110
771 #include <mbarrier.h>
772 #define ECB_MEMORY_FENCE __machine_rw_barrier ()
773 #define ECB_MEMORY_FENCE_ACQUIRE __machine_r_barrier ()
774 #define ECB_MEMORY_FENCE_RELEASE __machine_w_barrier ()
775 #elif __xlC__
776 #define ECB_MEMORY_FENCE __sync ()
777 #endif
778#endif
779
780#ifndef ECB_MEMORY_FENCE
781 #if ECB_C11 && !defined __STDC_NO_ATOMICS__
782 /* we assume that these memory fences work on all variables/all memory accesses, */
783 /* not just C11 atomics and atomic accesses */
784 #include <stdatomic.h>
785 /* Unfortunately, neither gcc 4.7 nor clang 3.1 generate any instructions for */
786 /* any fence other than seq_cst, which isn't very efficient for us. */
787 /* Why that is, we don't know - either the C11 memory model is quite useless */
788 /* for most usages, or gcc and clang have a bug */
789 /* I *currently* lean towards the latter, and inefficiently implement */
790 /* all three of ecb's fences as a seq_cst fence */
791 /* Update, gcc-4.8 generates mfence for all c++ fences, but nothing */
792 /* for all __atomic_thread_fence's except seq_cst */
793 #define ECB_MEMORY_FENCE atomic_thread_fence (memory_order_seq_cst)
794 #endif
795#endif
796
797#ifndef ECB_MEMORY_FENCE
798 #if !ECB_AVOID_PTHREADS
799 /*
800 * if you get undefined symbol references to pthread_mutex_lock,
801 * or failure to find pthread.h, then you should implement
802 * the ECB_MEMORY_FENCE operations for your cpu/compiler
803 * OR provide pthread.h and link against the posix thread library
804 * of your system.
805 */
806 #include <pthread.h>
807 #define ECB_NEEDS_PTHREADS 1
808 #define ECB_MEMORY_FENCE_NEEDS_PTHREADS 1
809
810 static pthread_mutex_t ecb_mf_lock = PTHREAD_MUTEX_INITIALIZER;
811 #define ECB_MEMORY_FENCE do { pthread_mutex_lock (&ecb_mf_lock); pthread_mutex_unlock (&ecb_mf_lock); } while (0)
812 #endif
813#endif
814
815#if !defined ECB_MEMORY_FENCE_ACQUIRE && defined ECB_MEMORY_FENCE
816 #define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
817#endif
818
819#if !defined ECB_MEMORY_FENCE_RELEASE && defined ECB_MEMORY_FENCE
820 #define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
821#endif
822
823/*****************************************************************************/
824
825#if ECB_CPP
826 #define ecb_inline static inline
827#elif ECB_GCC_VERSION(2,5)
828 #define ecb_inline static __inline__
829#elif ECB_C99
830 #define ecb_inline static inline
831#else
832 #define ecb_inline static
833#endif
834
835#if ECB_GCC_VERSION(3,3)
836 #define ecb_restrict __restrict__
837#elif ECB_C99
838 #define ecb_restrict restrict
839#else
840 #define ecb_restrict
841#endif
842
843typedef int ecb_bool;
844
845#define ECB_CONCAT_(a, b) a ## b
846#define ECB_CONCAT(a, b) ECB_CONCAT_(a, b)
847#define ECB_STRINGIFY_(a) # a
848#define ECB_STRINGIFY(a) ECB_STRINGIFY_(a)
849#define ECB_STRINGIFY_EXPR(expr) ((expr), ECB_STRINGIFY_ (expr))
850
851#define ecb_function_ ecb_inline
852
853#if ECB_GCC_VERSION(3,1) || ECB_CLANG_VERSION(2,8)
854 #define ecb_attribute(attrlist) __attribute__ (attrlist)
855#else
856 #define ecb_attribute(attrlist)
857#endif
858
859#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_constant_p)
860 #define ecb_is_constant(expr) __builtin_constant_p (expr)
861#else
862 /* possible C11 impl for integral types
863 typedef struct ecb_is_constant_struct ecb_is_constant_struct;
864 #define ecb_is_constant(expr) _Generic ((1 ? (struct ecb_is_constant_struct *)0 : (void *)((expr) - (expr)), ecb_is_constant_struct *: 0, default: 1)) */
865
866 #define ecb_is_constant(expr) 0
867#endif
868
869#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_expect)
463# define expect(expr,value) __builtin_expect ((expr),(value)) 870 #define ecb_expect(expr,value) __builtin_expect ((expr),(value))
464# define noinline __attribute__ ((noinline))
465#else 871#else
466# define expect(expr,value) (expr) 872 #define ecb_expect(expr,value) (expr)
467# define noinline
468# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
469# define inline
470# endif 873#endif
471#endif
472 874
875#if ECB_GCC_VERSION(3,1) || ECB_CLANG_BUILTIN(__builtin_prefetch)
876 #define ecb_prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality)
877#else
878 #define ecb_prefetch(addr,rw,locality)
879#endif
880
881/* no emulation for ecb_decltype */
882#if ECB_CPP11
883 // older implementations might have problems with decltype(x)::type, work around it
884 template<class T> struct ecb_decltype_t { typedef T type; };
885 #define ecb_decltype(x) ecb_decltype_t<decltype (x)>::type
886#elif ECB_GCC_VERSION(3,0) || ECB_CLANG_VERSION(2,8)
887 #define ecb_decltype(x) __typeof__ (x)
888#endif
889
890#if _MSC_VER >= 1300
891 #define ecb_deprecated __declspec (deprecated)
892#else
893 #define ecb_deprecated ecb_attribute ((__deprecated__))
894#endif
895
896#if _MSC_VER >= 1500
897 #define ecb_deprecated_message(msg) __declspec (deprecated (msg))
898#elif ECB_GCC_VERSION(4,5)
899 #define ecb_deprecated_message(msg) ecb_attribute ((__deprecated__ (msg))
900#else
901 #define ecb_deprecated_message(msg) ecb_deprecated
902#endif
903
904#if _MSC_VER >= 1400
905 #define ecb_noinline __declspec (noinline)
906#else
907 #define ecb_noinline ecb_attribute ((__noinline__))
908#endif
909
910#define ecb_unused ecb_attribute ((__unused__))
911#define ecb_const ecb_attribute ((__const__))
912#define ecb_pure ecb_attribute ((__pure__))
913
914#if ECB_C11 || __IBMC_NORETURN
915 /* http://www-01.ibm.com/support/knowledgecenter/SSGH3R_13.1.0/com.ibm.xlcpp131.aix.doc/language_ref/noreturn.html */
916 #define ecb_noreturn _Noreturn
917#elif ECB_CPP11
918 #define ecb_noreturn [[noreturn]]
919#elif _MSC_VER >= 1200
920 /* http://msdn.microsoft.com/en-us/library/k6ktzx3s.aspx */
921 #define ecb_noreturn __declspec (noreturn)
922#else
923 #define ecb_noreturn ecb_attribute ((__noreturn__))
924#endif
925
926#if ECB_GCC_VERSION(4,3)
927 #define ecb_artificial ecb_attribute ((__artificial__))
928 #define ecb_hot ecb_attribute ((__hot__))
929 #define ecb_cold ecb_attribute ((__cold__))
930#else
931 #define ecb_artificial
932 #define ecb_hot
933 #define ecb_cold
934#endif
935
936/* put around conditional expressions if you are very sure that the */
937/* expression is mostly true or mostly false. note that these return */
938/* booleans, not the expression. */
473#define expect_false(expr) expect ((expr) != 0, 0) 939#define ecb_expect_false(expr) ecb_expect (!!(expr), 0)
474#define expect_true(expr) expect ((expr) != 0, 1) 940#define ecb_expect_true(expr) ecb_expect (!!(expr), 1)
941/* for compatibility to the rest of the world */
942#define ecb_likely(expr) ecb_expect_true (expr)
943#define ecb_unlikely(expr) ecb_expect_false (expr)
944
945/* count trailing zero bits and count # of one bits */
946#if ECB_GCC_VERSION(3,4) \
947 || (ECB_CLANG_BUILTIN(__builtin_clz) && ECB_CLANG_BUILTIN(__builtin_clzll) \
948 && ECB_CLANG_BUILTIN(__builtin_ctz) && ECB_CLANG_BUILTIN(__builtin_ctzll) \
949 && ECB_CLANG_BUILTIN(__builtin_popcount))
950 /* we assume int == 32 bit, long == 32 or 64 bit and long long == 64 bit */
951 #define ecb_ld32(x) (__builtin_clz (x) ^ 31)
952 #define ecb_ld64(x) (__builtin_clzll (x) ^ 63)
953 #define ecb_ctz32(x) __builtin_ctz (x)
954 #define ecb_ctz64(x) __builtin_ctzll (x)
955 #define ecb_popcount32(x) __builtin_popcount (x)
956 /* no popcountll */
957#else
958 ecb_function_ ecb_const int ecb_ctz32 (uint32_t x);
959 ecb_function_ ecb_const int
960 ecb_ctz32 (uint32_t x)
961 {
962#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
963 unsigned long r;
964 _BitScanForward (&r, x);
965 return (int)r;
966#else
967 int r = 0;
968
969 x &= ~x + 1; /* this isolates the lowest bit */
970
971#if ECB_branchless_on_i386
972 r += !!(x & 0xaaaaaaaa) << 0;
973 r += !!(x & 0xcccccccc) << 1;
974 r += !!(x & 0xf0f0f0f0) << 2;
975 r += !!(x & 0xff00ff00) << 3;
976 r += !!(x & 0xffff0000) << 4;
977#else
978 if (x & 0xaaaaaaaa) r += 1;
979 if (x & 0xcccccccc) r += 2;
980 if (x & 0xf0f0f0f0) r += 4;
981 if (x & 0xff00ff00) r += 8;
982 if (x & 0xffff0000) r += 16;
983#endif
984
985 return r;
986#endif
987 }
988
989 ecb_function_ ecb_const int ecb_ctz64 (uint64_t x);
990 ecb_function_ ecb_const int
991 ecb_ctz64 (uint64_t x)
992 {
993#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
994 unsigned long r;
995 _BitScanForward64 (&r, x);
996 return (int)r;
997#else
998 int shift = x & 0xffffffff ? 0 : 32;
999 return ecb_ctz32 (x >> shift) + shift;
1000#endif
1001 }
1002
1003 ecb_function_ ecb_const int ecb_popcount32 (uint32_t x);
1004 ecb_function_ ecb_const int
1005 ecb_popcount32 (uint32_t x)
1006 {
1007 x -= (x >> 1) & 0x55555555;
1008 x = ((x >> 2) & 0x33333333) + (x & 0x33333333);
1009 x = ((x >> 4) + x) & 0x0f0f0f0f;
1010 x *= 0x01010101;
1011
1012 return x >> 24;
1013 }
1014
1015 ecb_function_ ecb_const int ecb_ld32 (uint32_t x);
1016 ecb_function_ ecb_const int ecb_ld32 (uint32_t x)
1017 {
1018#if 1400 <= _MSC_VER && (_M_IX86 || _M_X64 || _M_IA64 || _M_ARM)
1019 unsigned long r;
1020 _BitScanReverse (&r, x);
1021 return (int)r;
1022#else
1023 int r = 0;
1024
1025 if (x >> 16) { x >>= 16; r += 16; }
1026 if (x >> 8) { x >>= 8; r += 8; }
1027 if (x >> 4) { x >>= 4; r += 4; }
1028 if (x >> 2) { x >>= 2; r += 2; }
1029 if (x >> 1) { r += 1; }
1030
1031 return r;
1032#endif
1033 }
1034
1035 ecb_function_ ecb_const int ecb_ld64 (uint64_t x);
1036 ecb_function_ ecb_const int ecb_ld64 (uint64_t x)
1037 {
1038#if 1400 <= _MSC_VER && (_M_X64 || _M_IA64 || _M_ARM)
1039 unsigned long r;
1040 _BitScanReverse64 (&r, x);
1041 return (int)r;
1042#else
1043 int r = 0;
1044
1045 if (x >> 32) { x >>= 32; r += 32; }
1046
1047 return r + ecb_ld32 (x);
1048#endif
1049 }
1050#endif
1051
1052ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x);
1053ecb_function_ ecb_const ecb_bool ecb_is_pot32 (uint32_t x) { return !(x & (x - 1)); }
1054ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x);
1055ecb_function_ ecb_const ecb_bool ecb_is_pot64 (uint64_t x) { return !(x & (x - 1)); }
1056
1057ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x);
1058ecb_function_ ecb_const uint8_t ecb_bitrev8 (uint8_t x)
1059{
1060 return ( (x * 0x0802U & 0x22110U)
1061 | (x * 0x8020U & 0x88440U)) * 0x10101U >> 16;
1062}
1063
1064ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x);
1065ecb_function_ ecb_const uint16_t ecb_bitrev16 (uint16_t x)
1066{
1067 x = ((x >> 1) & 0x5555) | ((x & 0x5555) << 1);
1068 x = ((x >> 2) & 0x3333) | ((x & 0x3333) << 2);
1069 x = ((x >> 4) & 0x0f0f) | ((x & 0x0f0f) << 4);
1070 x = ( x >> 8 ) | ( x << 8);
1071
1072 return x;
1073}
1074
1075ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x);
1076ecb_function_ ecb_const uint32_t ecb_bitrev32 (uint32_t x)
1077{
1078 x = ((x >> 1) & 0x55555555) | ((x & 0x55555555) << 1);
1079 x = ((x >> 2) & 0x33333333) | ((x & 0x33333333) << 2);
1080 x = ((x >> 4) & 0x0f0f0f0f) | ((x & 0x0f0f0f0f) << 4);
1081 x = ((x >> 8) & 0x00ff00ff) | ((x & 0x00ff00ff) << 8);
1082 x = ( x >> 16 ) | ( x << 16);
1083
1084 return x;
1085}
1086
1087/* popcount64 is only available on 64 bit cpus as gcc builtin */
1088/* so for this version we are lazy */
1089ecb_function_ ecb_const int ecb_popcount64 (uint64_t x);
1090ecb_function_ ecb_const int
1091ecb_popcount64 (uint64_t x)
1092{
1093 return ecb_popcount32 (x) + ecb_popcount32 (x >> 32);
1094}
1095
1096ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count);
1097ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count);
1098ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count);
1099ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count);
1100ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count);
1101ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count);
1102ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count);
1103ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count);
1104
1105ecb_inline ecb_const uint8_t ecb_rotl8 (uint8_t x, unsigned int count) { return (x >> ( 8 - count)) | (x << count); }
1106ecb_inline ecb_const uint8_t ecb_rotr8 (uint8_t x, unsigned int count) { return (x << ( 8 - count)) | (x >> count); }
1107ecb_inline ecb_const uint16_t ecb_rotl16 (uint16_t x, unsigned int count) { return (x >> (16 - count)) | (x << count); }
1108ecb_inline ecb_const uint16_t ecb_rotr16 (uint16_t x, unsigned int count) { return (x << (16 - count)) | (x >> count); }
1109ecb_inline ecb_const uint32_t ecb_rotl32 (uint32_t x, unsigned int count) { return (x >> (32 - count)) | (x << count); }
1110ecb_inline ecb_const uint32_t ecb_rotr32 (uint32_t x, unsigned int count) { return (x << (32 - count)) | (x >> count); }
1111ecb_inline ecb_const uint64_t ecb_rotl64 (uint64_t x, unsigned int count) { return (x >> (64 - count)) | (x << count); }
1112ecb_inline ecb_const uint64_t ecb_rotr64 (uint64_t x, unsigned int count) { return (x << (64 - count)) | (x >> count); }
1113
1114#if ECB_GCC_VERSION(4,3) || (ECB_CLANG_BUILTIN(__builtin_bswap32) && ECB_CLANG_BUILTIN(__builtin_bswap64))
1115 #if ECB_GCC_VERSION(4,8) || ECB_CLANG_BUILTIN(__builtin_bswap16)
1116 #define ecb_bswap16(x) __builtin_bswap16 (x)
1117 #else
1118 #define ecb_bswap16(x) (__builtin_bswap32 (x) >> 16)
1119 #endif
1120 #define ecb_bswap32(x) __builtin_bswap32 (x)
1121 #define ecb_bswap64(x) __builtin_bswap64 (x)
1122#elif _MSC_VER
1123 #include <stdlib.h>
1124 #define ecb_bswap16(x) ((uint16_t)_byteswap_ushort ((uint16_t)(x)))
1125 #define ecb_bswap32(x) ((uint32_t)_byteswap_ulong ((uint32_t)(x)))
1126 #define ecb_bswap64(x) ((uint64_t)_byteswap_uint64 ((uint64_t)(x)))
1127#else
1128 ecb_function_ ecb_const uint16_t ecb_bswap16 (uint16_t x);
1129 ecb_function_ ecb_const uint16_t
1130 ecb_bswap16 (uint16_t x)
1131 {
1132 return ecb_rotl16 (x, 8);
1133 }
1134
1135 ecb_function_ ecb_const uint32_t ecb_bswap32 (uint32_t x);
1136 ecb_function_ ecb_const uint32_t
1137 ecb_bswap32 (uint32_t x)
1138 {
1139 return (((uint32_t)ecb_bswap16 (x)) << 16) | ecb_bswap16 (x >> 16);
1140 }
1141
1142 ecb_function_ ecb_const uint64_t ecb_bswap64 (uint64_t x);
1143 ecb_function_ ecb_const uint64_t
1144 ecb_bswap64 (uint64_t x)
1145 {
1146 return (((uint64_t)ecb_bswap32 (x)) << 32) | ecb_bswap32 (x >> 32);
1147 }
1148#endif
1149
1150#if ECB_GCC_VERSION(4,5) || ECB_CLANG_BUILTIN(__builtin_unreachable)
1151 #define ecb_unreachable() __builtin_unreachable ()
1152#else
1153 /* this seems to work fine, but gcc always emits a warning for it :/ */
1154 ecb_inline ecb_noreturn void ecb_unreachable (void);
1155 ecb_inline ecb_noreturn void ecb_unreachable (void) { }
1156#endif
1157
1158/* try to tell the compiler that some condition is definitely true */
1159#define ecb_assume(cond) if (!(cond)) ecb_unreachable (); else 0
1160
1161ecb_inline ecb_const uint32_t ecb_byteorder_helper (void);
1162ecb_inline ecb_const uint32_t
1163ecb_byteorder_helper (void)
1164{
1165 /* the union code still generates code under pressure in gcc, */
1166 /* but less than using pointers, and always seems to */
1167 /* successfully return a constant. */
1168 /* the reason why we have this horrible preprocessor mess */
1169 /* is to avoid it in all cases, at least on common architectures */
1170 /* or when using a recent enough gcc version (>= 4.6) */
1171#if (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) \
1172 || ((__i386 || __i386__ || _M_IX86 || ECB_GCC_AMD64 || ECB_MSVC_AMD64) && !__VOS__)
1173 #define ECB_LITTLE_ENDIAN 1
1174 return 0x44332211;
1175#elif (defined __BYTE_ORDER__ && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) \
1176 || ((__AARCH64EB__ || __MIPSEB__ || __ARMEB__) && !__VOS__)
1177 #define ECB_BIG_ENDIAN 1
1178 return 0x11223344;
1179#else
1180 union
1181 {
1182 uint8_t c[4];
1183 uint32_t u;
1184 } u = { 0x11, 0x22, 0x33, 0x44 };
1185 return u.u;
1186#endif
1187}
1188
1189ecb_inline ecb_const ecb_bool ecb_big_endian (void);
1190ecb_inline ecb_const ecb_bool ecb_big_endian (void) { return ecb_byteorder_helper () == 0x11223344; }
1191ecb_inline ecb_const ecb_bool ecb_little_endian (void);
1192ecb_inline ecb_const ecb_bool ecb_little_endian (void) { return ecb_byteorder_helper () == 0x44332211; }
1193
1194#if ECB_GCC_VERSION(3,0) || ECB_C99
1195 #define ecb_mod(m,n) ((m) % (n) + ((m) % (n) < 0 ? (n) : 0))
1196#else
1197 #define ecb_mod(m,n) ((m) < 0 ? ((n) - 1 - ((-1 - (m)) % (n))) : ((m) % (n)))
1198#endif
1199
1200#if ECB_CPP
1201 template<typename T>
1202 static inline T ecb_div_rd (T val, T div)
1203 {
1204 return val < 0 ? - ((-val + div - 1) / div) : (val ) / div;
1205 }
1206 template<typename T>
1207 static inline T ecb_div_ru (T val, T div)
1208 {
1209 return val < 0 ? - ((-val ) / div) : (val + div - 1) / div;
1210 }
1211#else
1212 #define ecb_div_rd(val,div) ((val) < 0 ? - ((-(val) + (div) - 1) / (div)) : ((val) ) / (div))
1213 #define ecb_div_ru(val,div) ((val) < 0 ? - ((-(val) ) / (div)) : ((val) + (div) - 1) / (div))
1214#endif
1215
1216#if ecb_cplusplus_does_not_suck
1217 /* does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) */
1218 template<typename T, int N>
1219 static inline int ecb_array_length (const T (&arr)[N])
1220 {
1221 return N;
1222 }
1223#else
1224 #define ecb_array_length(name) (sizeof (name) / sizeof (name [0]))
1225#endif
1226
1227ecb_function_ ecb_const uint32_t ecb_binary16_to_binary32 (uint32_t x);
1228ecb_function_ ecb_const uint32_t
1229ecb_binary16_to_binary32 (uint32_t x)
1230{
1231 unsigned int s = (x & 0x8000) << (31 - 15);
1232 int e = (x >> 10) & 0x001f;
1233 unsigned int m = x & 0x03ff;
1234
1235 if (ecb_expect_false (e == 31))
1236 /* infinity or NaN */
1237 e = 255 - (127 - 15);
1238 else if (ecb_expect_false (!e))
1239 {
1240 if (ecb_expect_true (!m))
1241 /* zero, handled by code below by forcing e to 0 */
1242 e = 0 - (127 - 15);
1243 else
1244 {
1245 /* subnormal, renormalise */
1246 unsigned int s = 10 - ecb_ld32 (m);
1247
1248 m = (m << s) & 0x3ff; /* mask implicit bit */
1249 e -= s - 1;
1250 }
1251 }
1252
1253 /* e and m now are normalised, or zero, (or inf or nan) */
1254 e += 127 - 15;
1255
1256 return s | (e << 23) | (m << (23 - 10));
1257}
1258
1259ecb_function_ ecb_const uint16_t ecb_binary32_to_binary16 (uint32_t x);
1260ecb_function_ ecb_const uint16_t
1261ecb_binary32_to_binary16 (uint32_t x)
1262{
1263 unsigned int s = (x >> 16) & 0x00008000; /* sign bit, the easy part */
1264 unsigned int e = ((x >> 23) & 0x000000ff) - (127 - 15); /* the desired exponent */
1265 unsigned int m = x & 0x007fffff;
1266
1267 x &= 0x7fffffff;
1268
1269 /* if it's within range of binary16 normals, use fast path */
1270 if (ecb_expect_true (0x38800000 <= x && x <= 0x477fefff))
1271 {
1272 /* mantissa round-to-even */
1273 m += 0x00000fff + ((m >> (23 - 10)) & 1);
1274
1275 /* handle overflow */
1276 if (ecb_expect_false (m >= 0x00800000))
1277 {
1278 m >>= 1;
1279 e += 1;
1280 }
1281
1282 return s | (e << 10) | (m >> (23 - 10));
1283 }
1284
1285 /* handle large numbers and infinity */
1286 if (ecb_expect_true (0x477fefff < x && x <= 0x7f800000))
1287 return s | 0x7c00;
1288
1289 /* handle zero, subnormals and small numbers */
1290 if (ecb_expect_true (x < 0x38800000))
1291 {
1292 /* zero */
1293 if (ecb_expect_true (!x))
1294 return s;
1295
1296 /* handle subnormals */
1297
1298 /* too small, will be zero */
1299 if (e < (14 - 24)) /* might not be sharp, but is good enough */
1300 return s;
1301
1302 m |= 0x00800000; /* make implicit bit explicit */
1303
1304 /* very tricky - we need to round to the nearest e (+10) bit value */
1305 {
1306 unsigned int bits = 14 - e;
1307 unsigned int half = (1 << (bits - 1)) - 1;
1308 unsigned int even = (m >> bits) & 1;
1309
1310 /* if this overflows, we will end up with a normalised number */
1311 m = (m + half + even) >> bits;
1312 }
1313
1314 return s | m;
1315 }
1316
1317 /* handle NaNs, preserve leftmost nan bits, but make sure we don't turn them into infinities */
1318 m >>= 13;
1319
1320 return s | 0x7c00 | m | !m;
1321}
1322
1323/*******************************************************************************/
1324/* floating point stuff, can be disabled by defining ECB_NO_LIBM */
1325
1326/* basically, everything uses "ieee pure-endian" floating point numbers */
1327/* the only noteworthy exception is ancient armle, which uses order 43218765 */
1328#if 0 \
1329 || __i386 || __i386__ \
1330 || ECB_GCC_AMD64 \
1331 || __powerpc__ || __ppc__ || __powerpc64__ || __ppc64__ \
1332 || defined __s390__ || defined __s390x__ \
1333 || defined __mips__ \
1334 || defined __alpha__ \
1335 || defined __hppa__ \
1336 || defined __ia64__ \
1337 || defined __m68k__ \
1338 || defined __m88k__ \
1339 || defined __sh__ \
1340 || defined _M_IX86 || defined ECB_MSVC_AMD64 || defined _M_IA64 \
1341 || (defined __arm__ && (defined __ARM_EABI__ || defined __EABI__ || defined __VFP_FP__ || defined _WIN32_WCE || defined __ANDROID__)) \
1342 || defined __aarch64__
1343 #define ECB_STDFP 1
1344 #include <string.h> /* for memcpy */
1345#else
1346 #define ECB_STDFP 0
1347#endif
1348
1349#ifndef ECB_NO_LIBM
1350
1351 #include <math.h> /* for frexp*, ldexp*, INFINITY, NAN */
1352
1353 /* only the oldest of old doesn't have this one. solaris. */
1354 #ifdef INFINITY
1355 #define ECB_INFINITY INFINITY
1356 #else
1357 #define ECB_INFINITY HUGE_VAL
1358 #endif
1359
1360 #ifdef NAN
1361 #define ECB_NAN NAN
1362 #else
1363 #define ECB_NAN ECB_INFINITY
1364 #endif
1365
1366 #if ECB_C99 || _XOPEN_VERSION >= 600 || _POSIX_VERSION >= 200112L
1367 #define ecb_ldexpf(x,e) ldexpf ((x), (e))
1368 #define ecb_frexpf(x,e) frexpf ((x), (e))
1369 #else
1370 #define ecb_ldexpf(x,e) (float) ldexp ((double) (x), (e))
1371 #define ecb_frexpf(x,e) (float) frexp ((double) (x), (e))
1372 #endif
1373
1374 /* convert a float to ieee single/binary32 */
1375 ecb_function_ ecb_const uint32_t ecb_float_to_binary32 (float x);
1376 ecb_function_ ecb_const uint32_t
1377 ecb_float_to_binary32 (float x)
1378 {
1379 uint32_t r;
1380
1381 #if ECB_STDFP
1382 memcpy (&r, &x, 4);
1383 #else
1384 /* slow emulation, works for anything but -0 */
1385 uint32_t m;
1386 int e;
1387
1388 if (x == 0e0f ) return 0x00000000U;
1389 if (x > +3.40282346638528860e+38f) return 0x7f800000U;
1390 if (x < -3.40282346638528860e+38f) return 0xff800000U;
1391 if (x != x ) return 0x7fbfffffU;
1392
1393 m = ecb_frexpf (x, &e) * 0x1000000U;
1394
1395 r = m & 0x80000000U;
1396
1397 if (r)
1398 m = -m;
1399
1400 if (e <= -126)
1401 {
1402 m &= 0xffffffU;
1403 m >>= (-125 - e);
1404 e = -126;
1405 }
1406
1407 r |= (e + 126) << 23;
1408 r |= m & 0x7fffffU;
1409 #endif
1410
1411 return r;
1412 }
1413
1414 /* converts an ieee single/binary32 to a float */
1415 ecb_function_ ecb_const float ecb_binary32_to_float (uint32_t x);
1416 ecb_function_ ecb_const float
1417 ecb_binary32_to_float (uint32_t x)
1418 {
1419 float r;
1420
1421 #if ECB_STDFP
1422 memcpy (&r, &x, 4);
1423 #else
1424 /* emulation, only works for normals and subnormals and +0 */
1425 int neg = x >> 31;
1426 int e = (x >> 23) & 0xffU;
1427
1428 x &= 0x7fffffU;
1429
1430 if (e)
1431 x |= 0x800000U;
1432 else
1433 e = 1;
1434
1435 /* we distrust ldexpf a bit and do the 2**-24 scaling by an extra multiply */
1436 r = ecb_ldexpf (x * (0.5f / 0x800000U), e - 126);
1437
1438 r = neg ? -r : r;
1439 #endif
1440
1441 return r;
1442 }
1443
1444 /* convert a double to ieee double/binary64 */
1445 ecb_function_ ecb_const uint64_t ecb_double_to_binary64 (double x);
1446 ecb_function_ ecb_const uint64_t
1447 ecb_double_to_binary64 (double x)
1448 {
1449 uint64_t r;
1450
1451 #if ECB_STDFP
1452 memcpy (&r, &x, 8);
1453 #else
1454 /* slow emulation, works for anything but -0 */
1455 uint64_t m;
1456 int e;
1457
1458 if (x == 0e0 ) return 0x0000000000000000U;
1459 if (x > +1.79769313486231470e+308) return 0x7ff0000000000000U;
1460 if (x < -1.79769313486231470e+308) return 0xfff0000000000000U;
1461 if (x != x ) return 0X7ff7ffffffffffffU;
1462
1463 m = frexp (x, &e) * 0x20000000000000U;
1464
1465 r = m & 0x8000000000000000;;
1466
1467 if (r)
1468 m = -m;
1469
1470 if (e <= -1022)
1471 {
1472 m &= 0x1fffffffffffffU;
1473 m >>= (-1021 - e);
1474 e = -1022;
1475 }
1476
1477 r |= ((uint64_t)(e + 1022)) << 52;
1478 r |= m & 0xfffffffffffffU;
1479 #endif
1480
1481 return r;
1482 }
1483
1484 /* converts an ieee double/binary64 to a double */
1485 ecb_function_ ecb_const double ecb_binary64_to_double (uint64_t x);
1486 ecb_function_ ecb_const double
1487 ecb_binary64_to_double (uint64_t x)
1488 {
1489 double r;
1490
1491 #if ECB_STDFP
1492 memcpy (&r, &x, 8);
1493 #else
1494 /* emulation, only works for normals and subnormals and +0 */
1495 int neg = x >> 63;
1496 int e = (x >> 52) & 0x7ffU;
1497
1498 x &= 0xfffffffffffffU;
1499
1500 if (e)
1501 x |= 0x10000000000000U;
1502 else
1503 e = 1;
1504
1505 /* we distrust ldexp a bit and do the 2**-53 scaling by an extra multiply */
1506 r = ldexp (x * (0.5 / 0x10000000000000U), e - 1022);
1507
1508 r = neg ? -r : r;
1509 #endif
1510
1511 return r;
1512 }
1513
1514 /* convert a float to ieee half/binary16 */
1515 ecb_function_ ecb_const uint16_t ecb_float_to_binary16 (float x);
1516 ecb_function_ ecb_const uint16_t
1517 ecb_float_to_binary16 (float x)
1518 {
1519 return ecb_binary32_to_binary16 (ecb_float_to_binary32 (x));
1520 }
1521
1522 /* convert an ieee half/binary16 to float */
1523 ecb_function_ ecb_const float ecb_binary16_to_float (uint16_t x);
1524 ecb_function_ ecb_const float
1525 ecb_binary16_to_float (uint16_t x)
1526 {
1527 return ecb_binary32_to_float (ecb_binary16_to_binary32 (x));
1528 }
1529
1530#endif
1531
1532#endif
1533
1534/* ECB.H END */
1535
1536#if ECB_MEMORY_FENCE_NEEDS_PTHREADS
1537/* if your architecture doesn't need memory fences, e.g. because it is
1538 * single-cpu/core, or if you use libev in a project that doesn't use libev
1539 * from multiple threads, then you can define ECB_AVOID_PTHREADS when compiling
1540 * libev, in which cases the memory fences become nops.
1541 * alternatively, you can remove this #error and link against libpthread,
1542 * which will then provide the memory fences.
1543 */
1544# error "memory fences not defined for your architecture, please report"
1545#endif
1546
1547#ifndef ECB_MEMORY_FENCE
1548# define ECB_MEMORY_FENCE do { } while (0)
1549# define ECB_MEMORY_FENCE_ACQUIRE ECB_MEMORY_FENCE
1550# define ECB_MEMORY_FENCE_RELEASE ECB_MEMORY_FENCE
1551#endif
1552
1553#define expect_false(cond) ecb_expect_false (cond)
1554#define expect_true(cond) ecb_expect_true (cond)
1555#define noinline ecb_noinline
1556
475#define inline_size static inline 1557#define inline_size ecb_inline
476 1558
477#if EV_FEATURE_CODE 1559#if EV_FEATURE_CODE
478# define inline_speed static inline 1560# define inline_speed ecb_inline
479#else 1561#else
480# define inline_speed static noinline 1562# define inline_speed noinline static
481#endif 1563#endif
482 1564
483#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1) 1565#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
484 1566
485#if EV_MINPRI == EV_MAXPRI 1567#if EV_MINPRI == EV_MAXPRI
486# define ABSPRI(w) (((W)w), 0) 1568# define ABSPRI(w) (((W)w), 0)
487#else 1569#else
488# define ABSPRI(w) (((W)w)->priority - EV_MINPRI) 1570# define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
489#endif 1571#endif
490 1572
491#define EMPTY /* required for microsofts broken pseudo-c compiler */ 1573#define EMPTY /* required for microsofts broken pseudo-c compiler */
492#define EMPTY2(a,b) /* used to suppress some warnings */
493 1574
494typedef ev_watcher *W; 1575typedef ev_watcher *W;
495typedef ev_watcher_list *WL; 1576typedef ev_watcher_list *WL;
496typedef ev_watcher_time *WT; 1577typedef ev_watcher_time *WT;
497 1578
… …
522# include "ev_win32.c" 1603# include "ev_win32.c"
523#endif 1604#endif
524 1605
525/*****************************************************************************/ 1606/*****************************************************************************/
526 1607
1608#if EV_USE_LINUXAIO
1609# include <linux/aio_abi.h> /* probably only needed for aio_context_t */
1610#endif
1611
1612/* define a suitable floor function (only used by periodics atm) */
1613
1614#if EV_USE_FLOOR
1615# include <math.h>
1616# define ev_floor(v) floor (v)
1617#else
1618
1619#include <float.h>
1620
1621/* a floor() replacement function, should be independent of ev_tstamp type */
1622noinline
1623static ev_tstamp
1624ev_floor (ev_tstamp v)
1625{
1626 /* the choice of shift factor is not terribly important */
1627#if FLT_RADIX != 2 /* assume FLT_RADIX == 10 */
1628 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 10000000000000000000. : 1000000000.;
1629#else
1630 const ev_tstamp shift = sizeof (unsigned long) >= 8 ? 18446744073709551616. : 4294967296.;
1631#endif
1632
1633 /* argument too large for an unsigned long? */
1634 if (expect_false (v >= shift))
1635 {
1636 ev_tstamp f;
1637
1638 if (v == v - 1.)
1639 return v; /* very large number */
1640
1641 f = shift * ev_floor (v * (1. / shift));
1642 return f + ev_floor (v - f);
1643 }
1644
1645 /* special treatment for negative args? */
1646 if (expect_false (v < 0.))
1647 {
1648 ev_tstamp f = -ev_floor (-v);
1649
1650 return f - (f == v ? 0 : 1);
1651 }
1652
1653 /* fits into an unsigned long */
1654 return (unsigned long)v;
1655}
1656
1657#endif
1658
1659/*****************************************************************************/
1660
527#ifdef __linux 1661#ifdef __linux
528# include <sys/utsname.h> 1662# include <sys/utsname.h>
529#endif 1663#endif
530 1664
1665noinline ecb_cold
531static unsigned int noinline 1666static unsigned int
532ev_linux_version (void) 1667ev_linux_version (void)
533{ 1668{
534#ifdef __linux 1669#ifdef __linux
1670 unsigned int v = 0;
535 struct utsname buf; 1671 struct utsname buf;
536 unsigned int v;
537 int i; 1672 int i;
538 char *p = buf.release; 1673 char *p = buf.release;
539 1674
540 if (uname (&buf)) 1675 if (uname (&buf))
541 return 0; 1676 return 0;
… …
565} 1700}
566 1701
567/*****************************************************************************/ 1702/*****************************************************************************/
568 1703
569#if EV_AVOID_STDIO 1704#if EV_AVOID_STDIO
570static void noinline 1705noinline ecb_cold
1706static void
571ev_printerr (const char *msg) 1707ev_printerr (const char *msg)
572{ 1708{
573 write (STDERR_FILENO, msg, strlen (msg)); 1709 write (STDERR_FILENO, msg, strlen (msg));
574} 1710}
575#endif 1711#endif
576 1712
577static void (*syserr_cb)(const char *msg); 1713static void (*syserr_cb)(const char *msg) EV_NOEXCEPT;
578 1714
1715ecb_cold
579void 1716void
580ev_set_syserr_cb (void (*cb)(const char *msg)) 1717ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT
581{ 1718{
582 syserr_cb = cb; 1719 syserr_cb = cb;
583} 1720}
584 1721
585static void noinline 1722noinline ecb_cold
1723static void
586ev_syserr (const char *msg) 1724ev_syserr (const char *msg)
587{ 1725{
588 if (!msg) 1726 if (!msg)
589 msg = "(libev) system error"; 1727 msg = "(libev) system error";
590 1728
591 if (syserr_cb) 1729 if (syserr_cb)
592 syserr_cb (msg); 1730 syserr_cb (msg);
593 else 1731 else
594 { 1732 {
595#if EV_AVOID_STDIO 1733#if EV_AVOID_STDIO
596 const char *err = strerror (errno);
597
598 ev_printerr (msg); 1734 ev_printerr (msg);
599 ev_printerr (": "); 1735 ev_printerr (": ");
600 ev_printerr (err); 1736 ev_printerr (strerror (errno));
601 ev_printerr ("\n"); 1737 ev_printerr ("\n");
602#else 1738#else
603 perror (msg); 1739 perror (msg);
604#endif 1740#endif
605 abort (); 1741 abort ();
606 } 1742 }
607} 1743}
608 1744
609static void * 1745static void *
610ev_realloc_emul (void *ptr, long size) 1746ev_realloc_emul (void *ptr, long size) EV_NOEXCEPT
611{ 1747{
612#if __GLIBC__
613 return realloc (ptr, size);
614#else
615 /* some systems, notably openbsd and darwin, fail to properly 1748 /* some systems, notably openbsd and darwin, fail to properly
616 * implement realloc (x, 0) (as required by both ansi c-89 and 1749 * implement realloc (x, 0) (as required by both ansi c-89 and
617 * the single unix specification, so work around them here. 1750 * the single unix specification, so work around them here.
1751 * recently, also (at least) fedora and debian started breaking it,
1752 * despite documenting it otherwise.
618 */ 1753 */
619 1754
620 if (size) 1755 if (size)
621 return realloc (ptr, size); 1756 return realloc (ptr, size);
622 1757
623 free (ptr); 1758 free (ptr);
624 return 0; 1759 return 0;
625#endif
626} 1760}
627 1761
628static void *(*alloc)(void *ptr, long size) = ev_realloc_emul; 1762static void *(*alloc)(void *ptr, long size) EV_NOEXCEPT = ev_realloc_emul;
629 1763
1764ecb_cold
630void 1765void
631ev_set_allocator (void *(*cb)(void *ptr, long size)) 1766ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT
632{ 1767{
633 alloc = cb; 1768 alloc = cb;
634} 1769}
635 1770
636inline_speed void * 1771inline_speed void *
… …
639 ptr = alloc (ptr, size); 1774 ptr = alloc (ptr, size);
640 1775
641 if (!ptr && size) 1776 if (!ptr && size)
642 { 1777 {
643#if EV_AVOID_STDIO 1778#if EV_AVOID_STDIO
644 ev_printerr ("libev: memory allocation failed, aborting.\n"); 1779 ev_printerr ("(libev) memory allocation failed, aborting.\n");
645#else 1780#else
646 fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size); 1781 fprintf (stderr, "(libev) cannot allocate %ld bytes, aborting.", size);
647#endif 1782#endif
648 abort (); 1783 abort ();
649 } 1784 }
650 1785
651 return ptr; 1786 return ptr;
… …
663typedef struct 1798typedef struct
664{ 1799{
665 WL head; 1800 WL head;
666 unsigned char events; /* the events watched for */ 1801 unsigned char events; /* the events watched for */
667 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */ 1802 unsigned char reify; /* flag set when this ANFD needs reification (EV_ANFD_REIFY, EV__IOFDSET) */
668 unsigned char emask; /* the epoll backend stores the actual kernel mask in here */ 1803 unsigned char emask; /* some backends store the actual kernel mask in here */
669 unsigned char unused; 1804 unsigned char unused;
670#if EV_USE_EPOLL 1805#if EV_USE_EPOLL
671 unsigned int egen; /* generation counter to counter epoll bugs */ 1806 unsigned int egen; /* generation counter to counter epoll bugs */
672#endif 1807#endif
673#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP 1808#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
… …
724 #undef VAR 1859 #undef VAR
725 }; 1860 };
726 #include "ev_wrap.h" 1861 #include "ev_wrap.h"
727 1862
728 static struct ev_loop default_loop_struct; 1863 static struct ev_loop default_loop_struct;
729 struct ev_loop *ev_default_loop_ptr; 1864 EV_API_DECL struct ev_loop *ev_default_loop_ptr = 0; /* needs to be initialised to make it a definition despite extern */
730 1865
731#else 1866#else
732 1867
733 ev_tstamp ev_rt_now; 1868 EV_API_DECL ev_tstamp ev_rt_now = 0; /* needs to be initialised to make it a definition despite extern */
734 #define VAR(name,decl) static decl; 1869 #define VAR(name,decl) static decl;
735 #include "ev_vars.h" 1870 #include "ev_vars.h"
736 #undef VAR 1871 #undef VAR
737 1872
738 static int ev_default_loop_ptr; 1873 static int ev_default_loop_ptr;
… …
753 1888
754/*****************************************************************************/ 1889/*****************************************************************************/
755 1890
756#ifndef EV_HAVE_EV_TIME 1891#ifndef EV_HAVE_EV_TIME
757ev_tstamp 1892ev_tstamp
758ev_time (void) 1893ev_time (void) EV_NOEXCEPT
759{ 1894{
760#if EV_USE_REALTIME 1895#if EV_USE_REALTIME
761 if (expect_true (have_realtime)) 1896 if (expect_true (have_realtime))
762 { 1897 {
763 struct timespec ts; 1898 struct timespec ts;
… …
787 return ev_time (); 1922 return ev_time ();
788} 1923}
789 1924
790#if EV_MULTIPLICITY 1925#if EV_MULTIPLICITY
791ev_tstamp 1926ev_tstamp
792ev_now (EV_P) 1927ev_now (EV_P) EV_NOEXCEPT
793{ 1928{
794 return ev_rt_now; 1929 return ev_rt_now;
795} 1930}
796#endif 1931#endif
797 1932
798void 1933void
799ev_sleep (ev_tstamp delay) 1934ev_sleep (ev_tstamp delay) EV_NOEXCEPT
800{ 1935{
801 if (delay > 0.) 1936 if (delay > 0.)
802 { 1937 {
803#if EV_USE_NANOSLEEP 1938#if EV_USE_NANOSLEEP
804 struct timespec ts; 1939 struct timespec ts;
805 1940
806 EV_TS_SET (ts, delay); 1941 EV_TS_SET (ts, delay);
807 nanosleep (&ts, 0); 1942 nanosleep (&ts, 0);
808#elif defined(_WIN32) 1943#elif defined _WIN32
1944 /* maybe this should round up, as ms is very low resolution */
1945 /* compared to select (µs) or nanosleep (ns) */
809 Sleep ((unsigned long)(delay * 1e3)); 1946 Sleep ((unsigned long)(delay * 1e3));
810#else 1947#else
811 struct timeval tv; 1948 struct timeval tv;
812 1949
813 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */ 1950 /* here we rely on sys/time.h + sys/types.h + unistd.h providing select */
… …
832 1969
833 do 1970 do
834 ncur <<= 1; 1971 ncur <<= 1;
835 while (cnt > ncur); 1972 while (cnt > ncur);
836 1973
837 /* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */ 1974 /* if size is large, round to MALLOC_ROUND - 4 * longs to accommodate malloc overhead */
838 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4) 1975 if (elem * ncur > MALLOC_ROUND - sizeof (void *) * 4)
839 { 1976 {
840 ncur *= elem; 1977 ncur *= elem;
841 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1); 1978 ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void *) * 4) & ~(MALLOC_ROUND - 1);
842 ncur = ncur - sizeof (void *) * 4; 1979 ncur = ncur - sizeof (void *) * 4;
… …
844 } 1981 }
845 1982
846 return ncur; 1983 return ncur;
847} 1984}
848 1985
849static noinline void * 1986noinline ecb_cold
1987static void *
850array_realloc (int elem, void *base, int *cur, int cnt) 1988array_realloc (int elem, void *base, int *cur, int cnt)
851{ 1989{
852 *cur = array_nextsize (elem, *cur, cnt); 1990 *cur = array_nextsize (elem, *cur, cnt);
853 return ev_realloc (base, elem * *cur); 1991 return ev_realloc (base, elem * *cur);
854} 1992}
855 1993
1994#define array_needsize_noinit(base,count)
1995
856#define array_init_zero(base,count) \ 1996#define array_needsize_zerofill(base,count) \
857 memset ((void *)(base), 0, sizeof (*(base)) * (count)) 1997 memset ((void *)(base), 0, sizeof (*(base)) * (count))
858 1998
859#define array_needsize(type,base,cur,cnt,init) \ 1999#define array_needsize(type,base,cur,cnt,init) \
860 if (expect_false ((cnt) > (cur))) \ 2000 if (expect_false ((cnt) > (cur))) \
861 { \ 2001 { \
862 int ocur_ = (cur); \ 2002 ecb_unused int ocur_ = (cur); \
863 (base) = (type *)array_realloc \ 2003 (base) = (type *)array_realloc \
864 (sizeof (type), (base), &(cur), (cnt)); \ 2004 (sizeof (type), (base), &(cur), (cnt)); \
865 init ((base) + (ocur_), (cur) - ocur_); \ 2005 init ((base) + (ocur_), (cur) - ocur_); \
866 } 2006 }
867 2007
… …
879 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0 2019 ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0; stem ## s idx = 0
880 2020
881/*****************************************************************************/ 2021/*****************************************************************************/
882 2022
883/* dummy callback for pending events */ 2023/* dummy callback for pending events */
884static void noinline 2024noinline
2025static void
885pendingcb (EV_P_ ev_prepare *w, int revents) 2026pendingcb (EV_P_ ev_prepare *w, int revents)
886{ 2027{
887} 2028}
888 2029
889void noinline 2030noinline
2031void
890ev_feed_event (EV_P_ void *w, int revents) 2032ev_feed_event (EV_P_ void *w, int revents) EV_NOEXCEPT
891{ 2033{
892 W w_ = (W)w; 2034 W w_ = (W)w;
893 int pri = ABSPRI (w_); 2035 int pri = ABSPRI (w_);
894 2036
895 if (expect_false (w_->pending)) 2037 if (expect_false (w_->pending))
896 pendings [pri][w_->pending - 1].events |= revents; 2038 pendings [pri][w_->pending - 1].events |= revents;
897 else 2039 else
898 { 2040 {
899 w_->pending = ++pendingcnt [pri]; 2041 w_->pending = ++pendingcnt [pri];
900 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2); 2042 array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, array_needsize_noinit);
901 pendings [pri][w_->pending - 1].w = w_; 2043 pendings [pri][w_->pending - 1].w = w_;
902 pendings [pri][w_->pending - 1].events = revents; 2044 pendings [pri][w_->pending - 1].events = revents;
903 } 2045 }
2046
2047 pendingpri = NUMPRI - 1;
904} 2048}
905 2049
906inline_speed void 2050inline_speed void
907feed_reverse (EV_P_ W w) 2051feed_reverse (EV_P_ W w)
908{ 2052{
909 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, EMPTY2); 2053 array_needsize (W, rfeeds, rfeedmax, rfeedcnt + 1, array_needsize_noinit);
910 rfeeds [rfeedcnt++] = w; 2054 rfeeds [rfeedcnt++] = w;
911} 2055}
912 2056
913inline_size void 2057inline_size void
914feed_reverse_done (EV_P_ int revents) 2058feed_reverse_done (EV_P_ int revents)
… …
954 if (expect_true (!anfd->reify)) 2098 if (expect_true (!anfd->reify))
955 fd_event_nocheck (EV_A_ fd, revents); 2099 fd_event_nocheck (EV_A_ fd, revents);
956} 2100}
957 2101
958void 2102void
959ev_feed_fd_event (EV_P_ int fd, int revents) 2103ev_feed_fd_event (EV_P_ int fd, int revents) EV_NOEXCEPT
960{ 2104{
961 if (fd >= 0 && fd < anfdmax) 2105 if (fd >= 0 && fd < anfdmax)
962 fd_event_nocheck (EV_A_ fd, revents); 2106 fd_event_nocheck (EV_A_ fd, revents);
963} 2107}
964 2108
… …
967inline_size void 2111inline_size void
968fd_reify (EV_P) 2112fd_reify (EV_P)
969{ 2113{
970 int i; 2114 int i;
971 2115
2116#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
2117 for (i = 0; i < fdchangecnt; ++i)
2118 {
2119 int fd = fdchanges [i];
2120 ANFD *anfd = anfds + fd;
2121
2122 if (anfd->reify & EV__IOFDSET && anfd->head)
2123 {
2124 SOCKET handle = EV_FD_TO_WIN32_HANDLE (fd);
2125
2126 if (handle != anfd->handle)
2127 {
2128 unsigned long arg;
2129
2130 assert (("libev: only socket fds supported in this configuration", ioctlsocket (handle, FIONREAD, &arg) == 0));
2131
2132 /* handle changed, but fd didn't - we need to do it in two steps */
2133 backend_modify (EV_A_ fd, anfd->events, 0);
2134 anfd->events = 0;
2135 anfd->handle = handle;
2136 }
2137 }
2138 }
2139#endif
2140
972 for (i = 0; i < fdchangecnt; ++i) 2141 for (i = 0; i < fdchangecnt; ++i)
973 { 2142 {
974 int fd = fdchanges [i]; 2143 int fd = fdchanges [i];
975 ANFD *anfd = anfds + fd; 2144 ANFD *anfd = anfds + fd;
976 ev_io *w; 2145 ev_io *w;
… …
978 unsigned char o_events = anfd->events; 2147 unsigned char o_events = anfd->events;
979 unsigned char o_reify = anfd->reify; 2148 unsigned char o_reify = anfd->reify;
980 2149
981 anfd->reify = 0; 2150 anfd->reify = 0;
982 2151
983#if EV_SELECT_IS_WINSOCKET || EV_USE_IOCP
984 if (o_reify & EV__IOFDSET)
985 {
986 unsigned long arg;
987 anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
988 assert (("libev: only socket fds supported in this configuration", ioctlsocket (anfd->handle, FIONREAD, &arg) == 0));
989 printf ("oi %d %x\n", fd, anfd->handle);//D
990 }
991#endif
992
993 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */ 2152 /*if (expect_true (o_reify & EV_ANFD_REIFY)) probably a deoptimisation */
994 { 2153 {
995 anfd->events = 0; 2154 anfd->events = 0;
996 2155
997 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next) 2156 for (w = (ev_io *)anfd->head; w; w = (ev_io *)((WL)w)->next)
… …
1007 2166
1008 fdchangecnt = 0; 2167 fdchangecnt = 0;
1009} 2168}
1010 2169
1011/* something about the given fd changed */ 2170/* something about the given fd changed */
1012inline_size void 2171inline_size
2172void
1013fd_change (EV_P_ int fd, int flags) 2173fd_change (EV_P_ int fd, int flags)
1014{ 2174{
1015 unsigned char reify = anfds [fd].reify; 2175 unsigned char reify = anfds [fd].reify;
1016 anfds [fd].reify |= flags; 2176 anfds [fd].reify |= flags;
1017 2177
1018 if (expect_true (!reify)) 2178 if (expect_true (!reify))
1019 { 2179 {
1020 ++fdchangecnt; 2180 ++fdchangecnt;
1021 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2); 2181 array_needsize (int, fdchanges, fdchangemax, fdchangecnt, array_needsize_noinit);
1022 fdchanges [fdchangecnt - 1] = fd; 2182 fdchanges [fdchangecnt - 1] = fd;
1023 } 2183 }
1024} 2184}
1025 2185
1026/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */ 2186/* the given fd is invalid/unusable, so make sure it doesn't hurt us anymore */
1027inline_speed void 2187inline_speed ecb_cold void
1028fd_kill (EV_P_ int fd) 2188fd_kill (EV_P_ int fd)
1029{ 2189{
1030 ev_io *w; 2190 ev_io *w;
1031 2191
1032 while ((w = (ev_io *)anfds [fd].head)) 2192 while ((w = (ev_io *)anfds [fd].head))
… …
1035 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE); 2195 ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
1036 } 2196 }
1037} 2197}
1038 2198
1039/* check whether the given fd is actually valid, for error recovery */ 2199/* check whether the given fd is actually valid, for error recovery */
1040inline_size int 2200inline_size ecb_cold int
1041fd_valid (int fd) 2201fd_valid (int fd)
1042{ 2202{
1043#ifdef _WIN32 2203#ifdef _WIN32
1044 return EV_FD_TO_WIN32_HANDLE (fd) != -1; 2204 return EV_FD_TO_WIN32_HANDLE (fd) != -1;
1045#else 2205#else
1046 return fcntl (fd, F_GETFD) != -1; 2206 return fcntl (fd, F_GETFD) != -1;
1047#endif 2207#endif
1048} 2208}
1049 2209
1050/* called on EBADF to verify fds */ 2210/* called on EBADF to verify fds */
1051static void noinline 2211noinline ecb_cold
2212static void
1052fd_ebadf (EV_P) 2213fd_ebadf (EV_P)
1053{ 2214{
1054 int fd; 2215 int fd;
1055 2216
1056 for (fd = 0; fd < anfdmax; ++fd) 2217 for (fd = 0; fd < anfdmax; ++fd)
… …
1058 if (!fd_valid (fd) && errno == EBADF) 2219 if (!fd_valid (fd) && errno == EBADF)
1059 fd_kill (EV_A_ fd); 2220 fd_kill (EV_A_ fd);
1060} 2221}
1061 2222
1062/* called on ENOMEM in select/poll to kill some fds and retry */ 2223/* called on ENOMEM in select/poll to kill some fds and retry */
1063static void noinline 2224noinline ecb_cold
2225static void
1064fd_enomem (EV_P) 2226fd_enomem (EV_P)
1065{ 2227{
1066 int fd; 2228 int fd;
1067 2229
1068 for (fd = anfdmax; fd--; ) 2230 for (fd = anfdmax; fd--; )
… …
1072 break; 2234 break;
1073 } 2235 }
1074} 2236}
1075 2237
1076/* usually called after fork if backend needs to re-arm all fds from scratch */ 2238/* usually called after fork if backend needs to re-arm all fds from scratch */
1077static void noinline 2239noinline
2240static void
1078fd_rearm_all (EV_P) 2241fd_rearm_all (EV_P)
1079{ 2242{
1080 int fd; 2243 int fd;
1081 2244
1082 for (fd = 0; fd < anfdmax; ++fd) 2245 for (fd = 0; fd < anfdmax; ++fd)
… …
1263 2426
1264/*****************************************************************************/ 2427/*****************************************************************************/
1265 2428
1266#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2429#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1267 2430
1268static void noinline 2431noinline ecb_cold
2432static void
1269evpipe_init (EV_P) 2433evpipe_init (EV_P)
1270{ 2434{
1271 if (!ev_is_active (&pipe_w)) 2435 if (!ev_is_active (&pipe_w))
1272 { 2436 {
2437 int fds [2];
2438
1273# if EV_USE_EVENTFD 2439# if EV_USE_EVENTFD
2440 fds [0] = -1;
1274 evfd = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC); 2441 fds [1] = eventfd (0, EFD_NONBLOCK | EFD_CLOEXEC);
1275 if (evfd < 0 && errno == EINVAL) 2442 if (fds [1] < 0 && errno == EINVAL)
1276 evfd = eventfd (0, 0); 2443 fds [1] = eventfd (0, 0);
1277 2444
1278 if (evfd >= 0) 2445 if (fds [1] < 0)
2446# endif
1279 { 2447 {
2448 while (pipe (fds))
2449 ev_syserr ("(libev) error creating signal/async pipe");
2450
2451 fd_intern (fds [0]);
2452 }
2453
1280 evpipe [0] = -1; 2454 evpipe [0] = fds [0];
1281 fd_intern (evfd); /* doing it twice doesn't hurt */ 2455
1282 ev_io_set (&pipe_w, evfd, EV_READ); 2456 if (evpipe [1] < 0)
2457 evpipe [1] = fds [1]; /* first call, set write fd */
2458 else
2459 {
2460 /* on subsequent calls, do not change evpipe [1] */
2461 /* so that evpipe_write can always rely on its value. */
2462 /* this branch does not do anything sensible on windows, */
2463 /* so must not be executed on windows */
2464
2465 dup2 (fds [1], evpipe [1]);
2466 close (fds [1]);
2467 }
2468
2469 fd_intern (evpipe [1]);
2470
2471 ev_io_set (&pipe_w, evpipe [0] < 0 ? evpipe [1] : evpipe [0], EV_READ);
2472 ev_io_start (EV_A_ &pipe_w);
2473 ev_unref (EV_A); /* watcher should not keep loop alive */
2474 }
2475}
2476
2477inline_speed void
2478evpipe_write (EV_P_ EV_ATOMIC_T *flag)
2479{
2480 ECB_MEMORY_FENCE; /* push out the write before this function was called, acquire flag */
2481
2482 if (expect_true (*flag))
2483 return;
2484
2485 *flag = 1;
2486 ECB_MEMORY_FENCE_RELEASE; /* make sure flag is visible before the wakeup */
2487
2488 pipe_write_skipped = 1;
2489
2490 ECB_MEMORY_FENCE; /* make sure pipe_write_skipped is visible before we check pipe_write_wanted */
2491
2492 if (pipe_write_wanted)
2493 {
2494 int old_errno;
2495
2496 pipe_write_skipped = 0;
2497 ECB_MEMORY_FENCE_RELEASE;
2498
2499 old_errno = errno; /* save errno because write will clobber it */
2500
2501#if EV_USE_EVENTFD
2502 if (evpipe [0] < 0)
2503 {
2504 uint64_t counter = 1;
2505 write (evpipe [1], &counter, sizeof (uint64_t));
1283 } 2506 }
1284 else 2507 else
1285# endif 2508#endif
1286 { 2509 {
1287 while (pipe (evpipe)) 2510#ifdef _WIN32
1288 ev_syserr ("(libev) error creating signal/async pipe"); 2511 WSABUF buf;
1289 2512 DWORD sent;
1290 fd_intern (evpipe [0]); 2513 buf.buf = (char *)&buf;
1291 fd_intern (evpipe [1]); 2514 buf.len = 1;
1292 ev_io_set (&pipe_w, evpipe [0], EV_READ); 2515 WSASend (EV_FD_TO_WIN32_HANDLE (evpipe [1]), &buf, 1, &sent, 0, 0, 0);
2516#else
2517 write (evpipe [1], &(evpipe [1]), 1);
2518#endif
1293 } 2519 }
1294
1295 ev_io_start (EV_A_ &pipe_w);
1296 ev_unref (EV_A); /* watcher should not keep loop alive */
1297 }
1298}
1299
1300inline_size void
1301evpipe_write (EV_P_ EV_ATOMIC_T *flag)
1302{
1303 if (!*flag)
1304 {
1305 int old_errno = errno; /* save errno because write might clobber it */
1306 char dummy;
1307
1308 *flag = 1;
1309
1310#if EV_USE_EVENTFD
1311 if (evfd >= 0)
1312 {
1313 uint64_t counter = 1;
1314 write (evfd, &counter, sizeof (uint64_t));
1315 }
1316 else
1317#endif
1318 /* win32 people keep sending patches that change this write() to send() */
1319 /* and then run away. but send() is wrong, it wants a socket handle on win32 */
1320 /* so when you think this write should be a send instead, please find out */
1321 /* where your send() is from - it's definitely not the microsoft send, and */
1322 /* tell me. thank you. */
1323 write (evpipe [1], &dummy, 1);
1324 2520
1325 errno = old_errno; 2521 errno = old_errno;
1326 } 2522 }
1327} 2523}
1328 2524
… …
1331static void 2527static void
1332pipecb (EV_P_ ev_io *iow, int revents) 2528pipecb (EV_P_ ev_io *iow, int revents)
1333{ 2529{
1334 int i; 2530 int i;
1335 2531
2532 if (revents & EV_READ)
2533 {
1336#if EV_USE_EVENTFD 2534#if EV_USE_EVENTFD
1337 if (evfd >= 0) 2535 if (evpipe [0] < 0)
1338 { 2536 {
1339 uint64_t counter; 2537 uint64_t counter;
1340 read (evfd, &counter, sizeof (uint64_t)); 2538 read (evpipe [1], &counter, sizeof (uint64_t));
1341 } 2539 }
1342 else 2540 else
1343#endif 2541#endif
1344 { 2542 {
1345 char dummy; 2543 char dummy[4];
1346 /* see discussion in evpipe_write when you think this read should be recv in win32 */ 2544#ifdef _WIN32
2545 WSABUF buf;
2546 DWORD recvd;
2547 DWORD flags = 0;
2548 buf.buf = dummy;
2549 buf.len = sizeof (dummy);
2550 WSARecv (EV_FD_TO_WIN32_HANDLE (evpipe [0]), &buf, 1, &recvd, &flags, 0, 0);
2551#else
1347 read (evpipe [0], &dummy, 1); 2552 read (evpipe [0], &dummy, sizeof (dummy));
2553#endif
2554 }
1348 } 2555 }
1349 2556
2557 pipe_write_skipped = 0;
2558
2559 ECB_MEMORY_FENCE; /* push out skipped, acquire flags */
2560
2561#if EV_SIGNAL_ENABLE
1350 if (sig_pending) 2562 if (sig_pending)
1351 { 2563 {
1352 sig_pending = 0; 2564 sig_pending = 0;
2565
2566 ECB_MEMORY_FENCE;
1353 2567
1354 for (i = EV_NSIG - 1; i--; ) 2568 for (i = EV_NSIG - 1; i--; )
1355 if (expect_false (signals [i].pending)) 2569 if (expect_false (signals [i].pending))
1356 ev_feed_signal_event (EV_A_ i + 1); 2570 ev_feed_signal_event (EV_A_ i + 1);
1357 } 2571 }
2572#endif
1358 2573
1359#if EV_ASYNC_ENABLE 2574#if EV_ASYNC_ENABLE
1360 if (async_pending) 2575 if (async_pending)
1361 { 2576 {
1362 async_pending = 0; 2577 async_pending = 0;
2578
2579 ECB_MEMORY_FENCE;
1363 2580
1364 for (i = asynccnt; i--; ) 2581 for (i = asynccnt; i--; )
1365 if (asyncs [i]->sent) 2582 if (asyncs [i]->sent)
1366 { 2583 {
1367 asyncs [i]->sent = 0; 2584 asyncs [i]->sent = 0;
2585 ECB_MEMORY_FENCE_RELEASE;
1368 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC); 2586 ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
1369 } 2587 }
1370 } 2588 }
1371#endif 2589#endif
1372} 2590}
1373 2591
1374/*****************************************************************************/ 2592/*****************************************************************************/
1375 2593
2594void
2595ev_feed_signal (int signum) EV_NOEXCEPT
2596{
2597#if EV_MULTIPLICITY
2598 EV_P;
2599 ECB_MEMORY_FENCE_ACQUIRE;
2600 EV_A = signals [signum - 1].loop;
2601
2602 if (!EV_A)
2603 return;
2604#endif
2605
2606 signals [signum - 1].pending = 1;
2607 evpipe_write (EV_A_ &sig_pending);
2608}
2609
1376static void 2610static void
1377ev_sighandler (int signum) 2611ev_sighandler (int signum)
1378{ 2612{
1379#if EV_MULTIPLICITY
1380 EV_P = signals [signum - 1].loop;
1381#endif
1382
1383#ifdef _WIN32 2613#ifdef _WIN32
1384 signal (signum, ev_sighandler); 2614 signal (signum, ev_sighandler);
1385#endif 2615#endif
1386 2616
1387 signals [signum - 1].pending = 1; 2617 ev_feed_signal (signum);
1388 evpipe_write (EV_A_ &sig_pending);
1389} 2618}
1390 2619
1391void noinline 2620noinline
2621void
1392ev_feed_signal_event (EV_P_ int signum) 2622ev_feed_signal_event (EV_P_ int signum) EV_NOEXCEPT
1393{ 2623{
1394 WL w; 2624 WL w;
1395 2625
1396 if (expect_false (signum <= 0 || signum > EV_NSIG)) 2626 if (expect_false (signum <= 0 || signum >= EV_NSIG))
1397 return; 2627 return;
1398 2628
1399 --signum; 2629 --signum;
1400 2630
1401#if EV_MULTIPLICITY 2631#if EV_MULTIPLICITY
… …
1405 if (expect_false (signals [signum].loop != EV_A)) 2635 if (expect_false (signals [signum].loop != EV_A))
1406 return; 2636 return;
1407#endif 2637#endif
1408 2638
1409 signals [signum].pending = 0; 2639 signals [signum].pending = 0;
2640 ECB_MEMORY_FENCE_RELEASE;
1410 2641
1411 for (w = signals [signum].head; w; w = w->next) 2642 for (w = signals [signum].head; w; w = w->next)
1412 ev_feed_event (EV_A_ (W)w, EV_SIGNAL); 2643 ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
1413} 2644}
1414 2645
… …
1505# include "ev_kqueue.c" 2736# include "ev_kqueue.c"
1506#endif 2737#endif
1507#if EV_USE_EPOLL 2738#if EV_USE_EPOLL
1508# include "ev_epoll.c" 2739# include "ev_epoll.c"
1509#endif 2740#endif
2741#if EV_USE_LINUXAIO
2742# include "ev_linuxaio.c"
2743#endif
1510#if EV_USE_POLL 2744#if EV_USE_POLL
1511# include "ev_poll.c" 2745# include "ev_poll.c"
1512#endif 2746#endif
1513#if EV_USE_SELECT 2747#if EV_USE_SELECT
1514# include "ev_select.c" 2748# include "ev_select.c"
1515#endif 2749#endif
1516 2750
1517int 2751ecb_cold int
1518ev_version_major (void) 2752ev_version_major (void) EV_NOEXCEPT
1519{ 2753{
1520 return EV_VERSION_MAJOR; 2754 return EV_VERSION_MAJOR;
1521} 2755}
1522 2756
1523int 2757ecb_cold int
1524ev_version_minor (void) 2758ev_version_minor (void) EV_NOEXCEPT
1525{ 2759{
1526 return EV_VERSION_MINOR; 2760 return EV_VERSION_MINOR;
1527} 2761}
1528 2762
1529/* return true if we are running with elevated privileges and should ignore env variables */ 2763/* return true if we are running with elevated privileges and should ignore env variables */
1530int inline_size 2764inline_size ecb_cold int
1531enable_secure (void) 2765enable_secure (void)
1532{ 2766{
1533#ifdef _WIN32 2767#ifdef _WIN32
1534 return 0; 2768 return 0;
1535#else 2769#else
1536 return getuid () != geteuid () 2770 return getuid () != geteuid ()
1537 || getgid () != getegid (); 2771 || getgid () != getegid ();
1538#endif 2772#endif
1539} 2773}
1540 2774
2775ecb_cold
1541unsigned int 2776unsigned int
1542ev_supported_backends (void) 2777ev_supported_backends (void) EV_NOEXCEPT
1543{ 2778{
1544 unsigned int flags = 0; 2779 unsigned int flags = 0;
1545 2780
1546 if (EV_USE_PORT ) flags |= EVBACKEND_PORT; 2781 if (EV_USE_PORT ) flags |= EVBACKEND_PORT;
1547 if (EV_USE_KQUEUE) flags |= EVBACKEND_KQUEUE; 2782 if (EV_USE_KQUEUE ) flags |= EVBACKEND_KQUEUE;
1548 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL; 2783 if (EV_USE_EPOLL ) flags |= EVBACKEND_EPOLL;
2784 if (EV_USE_LINUXAIO) flags |= EVBACKEND_LINUXAIO;
1549 if (EV_USE_POLL ) flags |= EVBACKEND_POLL; 2785 if (EV_USE_POLL ) flags |= EVBACKEND_POLL;
1550 if (EV_USE_SELECT) flags |= EVBACKEND_SELECT; 2786 if (EV_USE_SELECT ) flags |= EVBACKEND_SELECT;
1551 2787
1552 return flags; 2788 return flags;
1553} 2789}
1554 2790
2791ecb_cold
1555unsigned int 2792unsigned int
1556ev_recommended_backends (void) 2793ev_recommended_backends (void) EV_NOEXCEPT
1557{ 2794{
1558 unsigned int flags = ev_supported_backends (); 2795 unsigned int flags = ev_supported_backends ();
1559 2796
1560#ifndef __NetBSD__ 2797#ifndef __NetBSD__
1561 /* kqueue is borked on everything but netbsd apparently */ 2798 /* kqueue is borked on everything but netbsd apparently */
… …
1569#endif 2806#endif
1570#ifdef __FreeBSD__ 2807#ifdef __FreeBSD__
1571 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */ 2808 flags &= ~EVBACKEND_POLL; /* poll return value is unusable (http://forums.freebsd.org/archive/index.php/t-10270.html) */
1572#endif 2809#endif
1573 2810
2811 /* TODO: linuxaio is very experimental */
2812 flags &= ~EVBACKEND_LINUXAIO;
2813
1574 return flags; 2814 return flags;
1575} 2815}
1576 2816
2817ecb_cold
1577unsigned int 2818unsigned int
1578ev_embeddable_backends (void) 2819ev_embeddable_backends (void) EV_NOEXCEPT
1579{ 2820{
1580 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT; 2821 int flags = EVBACKEND_EPOLL | EVBACKEND_KQUEUE | EVBACKEND_PORT;
1581 2822
1582 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */ 2823 /* epoll embeddability broken on all linux versions up to at least 2.6.23 */
1583 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */ 2824 if (ev_linux_version () < 0x020620) /* disable it on linux < 2.6.32 */
… …
1585 2826
1586 return flags; 2827 return flags;
1587} 2828}
1588 2829
1589unsigned int 2830unsigned int
1590ev_backend (EV_P) 2831ev_backend (EV_P) EV_NOEXCEPT
1591{ 2832{
1592 return backend; 2833 return backend;
1593} 2834}
1594 2835
1595#if EV_FEATURE_API 2836#if EV_FEATURE_API
1596unsigned int 2837unsigned int
1597ev_iteration (EV_P) 2838ev_iteration (EV_P) EV_NOEXCEPT
1598{ 2839{
1599 return loop_count; 2840 return loop_count;
1600} 2841}
1601 2842
1602unsigned int 2843unsigned int
1603ev_depth (EV_P) 2844ev_depth (EV_P) EV_NOEXCEPT
1604{ 2845{
1605 return loop_depth; 2846 return loop_depth;
1606} 2847}
1607 2848
1608void 2849void
1609ev_set_io_collect_interval (EV_P_ ev_tstamp interval) 2850ev_set_io_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1610{ 2851{
1611 io_blocktime = interval; 2852 io_blocktime = interval;
1612} 2853}
1613 2854
1614void 2855void
1615ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) 2856ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval) EV_NOEXCEPT
1616{ 2857{
1617 timeout_blocktime = interval; 2858 timeout_blocktime = interval;
1618} 2859}
1619 2860
1620void 2861void
1621ev_set_userdata (EV_P_ void *data) 2862ev_set_userdata (EV_P_ void *data) EV_NOEXCEPT
1622{ 2863{
1623 userdata = data; 2864 userdata = data;
1624} 2865}
1625 2866
1626void * 2867void *
1627ev_userdata (EV_P) 2868ev_userdata (EV_P) EV_NOEXCEPT
1628{ 2869{
1629 return userdata; 2870 return userdata;
1630} 2871}
1631 2872
2873void
1632void ev_set_invoke_pending_cb (EV_P_ void (*invoke_pending_cb)(EV_P)) 2874ev_set_invoke_pending_cb (EV_P_ ev_loop_callback invoke_pending_cb) EV_NOEXCEPT
1633{ 2875{
1634 invoke_cb = invoke_pending_cb; 2876 invoke_cb = invoke_pending_cb;
1635} 2877}
1636 2878
2879void
1637void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P), void (*acquire)(EV_P)) 2880ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT
1638{ 2881{
1639 release_cb = release; 2882 release_cb = release;
1640 acquire_cb = acquire; 2883 acquire_cb = acquire;
1641} 2884}
1642#endif 2885#endif
1643 2886
1644/* initialise a loop structure, must be zero-initialised */ 2887/* initialise a loop structure, must be zero-initialised */
1645static void noinline 2888noinline ecb_cold
2889static void
1646loop_init (EV_P_ unsigned int flags) 2890loop_init (EV_P_ unsigned int flags) EV_NOEXCEPT
1647{ 2891{
1648 if (!backend) 2892 if (!backend)
1649 { 2893 {
2894 origflags = flags;
2895
1650#if EV_USE_REALTIME 2896#if EV_USE_REALTIME
1651 if (!have_realtime) 2897 if (!have_realtime)
1652 { 2898 {
1653 struct timespec ts; 2899 struct timespec ts;
1654 2900
… …
1676 if (!(flags & EVFLAG_NOENV) 2922 if (!(flags & EVFLAG_NOENV)
1677 && !enable_secure () 2923 && !enable_secure ()
1678 && getenv ("LIBEV_FLAGS")) 2924 && getenv ("LIBEV_FLAGS"))
1679 flags = atoi (getenv ("LIBEV_FLAGS")); 2925 flags = atoi (getenv ("LIBEV_FLAGS"));
1680 2926
1681 ev_rt_now = ev_time (); 2927 ev_rt_now = ev_time ();
1682 mn_now = get_clock (); 2928 mn_now = get_clock ();
1683 now_floor = mn_now; 2929 now_floor = mn_now;
1684 rtmn_diff = ev_rt_now - mn_now; 2930 rtmn_diff = ev_rt_now - mn_now;
1685#if EV_FEATURE_API 2931#if EV_FEATURE_API
1686 invoke_cb = ev_invoke_pending; 2932 invoke_cb = ev_invoke_pending;
1687#endif 2933#endif
1688 2934
1689 io_blocktime = 0.; 2935 io_blocktime = 0.;
1690 timeout_blocktime = 0.; 2936 timeout_blocktime = 0.;
1691 backend = 0; 2937 backend = 0;
1692 backend_fd = -1; 2938 backend_fd = -1;
1693 sig_pending = 0; 2939 sig_pending = 0;
1694#if EV_ASYNC_ENABLE 2940#if EV_ASYNC_ENABLE
1695 async_pending = 0; 2941 async_pending = 0;
1696#endif 2942#endif
2943 pipe_write_skipped = 0;
2944 pipe_write_wanted = 0;
2945 evpipe [0] = -1;
2946 evpipe [1] = -1;
1697#if EV_USE_INOTIFY 2947#if EV_USE_INOTIFY
1698 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2; 2948 fs_fd = flags & EVFLAG_NOINOTIFY ? -1 : -2;
1699#endif 2949#endif
1700#if EV_USE_SIGNALFD 2950#if EV_USE_SIGNALFD
1701 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1; 2951 sigfd = flags & EVFLAG_SIGNALFD ? -2 : -1;
1702#endif 2952#endif
1703 2953
1704 if (!(flags & 0x0000ffffU)) 2954 if (!(flags & EVBACKEND_MASK))
1705 flags |= ev_recommended_backends (); 2955 flags |= ev_recommended_backends ();
1706 2956
1707#if EV_USE_IOCP 2957#if EV_USE_IOCP
1708 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags); 2958 if (!backend && (flags & EVBACKEND_IOCP )) backend = iocp_init (EV_A_ flags);
1709#endif 2959#endif
1710#if EV_USE_PORT 2960#if EV_USE_PORT
1711 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags); 2961 if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
1712#endif 2962#endif
1713#if EV_USE_KQUEUE 2963#if EV_USE_KQUEUE
1714 if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags); 2964 if (!backend && (flags & EVBACKEND_KQUEUE )) backend = kqueue_init (EV_A_ flags);
2965#endif
2966#if EV_USE_LINUXAIO
2967 if (!backend && (flags & EVBACKEND_LINUXAIO)) backend = linuxaio_init (EV_A_ flags);
1715#endif 2968#endif
1716#if EV_USE_EPOLL 2969#if EV_USE_EPOLL
1717 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags); 2970 if (!backend && (flags & EVBACKEND_EPOLL )) backend = epoll_init (EV_A_ flags);
1718#endif 2971#endif
1719#if EV_USE_POLL 2972#if EV_USE_POLL
1720 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags); 2973 if (!backend && (flags & EVBACKEND_POLL )) backend = poll_init (EV_A_ flags);
1721#endif 2974#endif
1722#if EV_USE_SELECT 2975#if EV_USE_SELECT
1723 if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags); 2976 if (!backend && (flags & EVBACKEND_SELECT )) backend = select_init (EV_A_ flags);
1724#endif 2977#endif
1725 2978
1726 ev_prepare_init (&pending_w, pendingcb); 2979 ev_prepare_init (&pending_w, pendingcb);
1727 2980
1728#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE 2981#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
… …
1731#endif 2984#endif
1732 } 2985 }
1733} 2986}
1734 2987
1735/* free up a loop structure */ 2988/* free up a loop structure */
1736static void noinline 2989ecb_cold
2990void
1737loop_destroy (EV_P) 2991ev_loop_destroy (EV_P)
1738{ 2992{
1739 int i; 2993 int i;
2994
2995#if EV_MULTIPLICITY
2996 /* mimic free (0) */
2997 if (!EV_A)
2998 return;
2999#endif
3000
3001#if EV_CLEANUP_ENABLE
3002 /* queue cleanup watchers (and execute them) */
3003 if (expect_false (cleanupcnt))
3004 {
3005 queue_events (EV_A_ (W *)cleanups, cleanupcnt, EV_CLEANUP);
3006 EV_INVOKE_PENDING;
3007 }
3008#endif
3009
3010#if EV_CHILD_ENABLE
3011 if (ev_is_default_loop (EV_A) && ev_is_active (&childev))
3012 {
3013 ev_ref (EV_A); /* child watcher */
3014 ev_signal_stop (EV_A_ &childev);
3015 }
3016#endif
1740 3017
1741 if (ev_is_active (&pipe_w)) 3018 if (ev_is_active (&pipe_w))
1742 { 3019 {
1743 /*ev_ref (EV_A);*/ 3020 /*ev_ref (EV_A);*/
1744 /*ev_io_stop (EV_A_ &pipe_w);*/ 3021 /*ev_io_stop (EV_A_ &pipe_w);*/
1745 3022
1746#if EV_USE_EVENTFD
1747 if (evfd >= 0)
1748 close (evfd);
1749#endif
1750
1751 if (evpipe [0] >= 0)
1752 {
1753 EV_WIN32_CLOSE_FD (evpipe [0]); 3023 if (evpipe [0] >= 0) EV_WIN32_CLOSE_FD (evpipe [0]);
1754 EV_WIN32_CLOSE_FD (evpipe [1]); 3024 if (evpipe [1] >= 0) EV_WIN32_CLOSE_FD (evpipe [1]);
1755 }
1756 } 3025 }
1757 3026
1758#if EV_USE_SIGNALFD 3027#if EV_USE_SIGNALFD
1759 if (ev_is_active (&sigfd_w)) 3028 if (ev_is_active (&sigfd_w))
1760 close (sigfd); 3029 close (sigfd);
… …
1767 3036
1768 if (backend_fd >= 0) 3037 if (backend_fd >= 0)
1769 close (backend_fd); 3038 close (backend_fd);
1770 3039
1771#if EV_USE_IOCP 3040#if EV_USE_IOCP
1772 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A); 3041 if (backend == EVBACKEND_IOCP ) iocp_destroy (EV_A);
1773#endif 3042#endif
1774#if EV_USE_PORT 3043#if EV_USE_PORT
1775 if (backend == EVBACKEND_PORT ) port_destroy (EV_A); 3044 if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
1776#endif 3045#endif
1777#if EV_USE_KQUEUE 3046#if EV_USE_KQUEUE
1778 if (backend == EVBACKEND_KQUEUE) kqueue_destroy (EV_A); 3047 if (backend == EVBACKEND_KQUEUE ) kqueue_destroy (EV_A);
3048#endif
3049#if EV_USE_LINUXAIO
3050 if (backend == EVBACKEND_LINUXAIO) linuxaio_destroy (EV_A);
1779#endif 3051#endif
1780#if EV_USE_EPOLL 3052#if EV_USE_EPOLL
1781 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A); 3053 if (backend == EVBACKEND_EPOLL ) epoll_destroy (EV_A);
1782#endif 3054#endif
1783#if EV_USE_POLL 3055#if EV_USE_POLL
1784 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A); 3056 if (backend == EVBACKEND_POLL ) poll_destroy (EV_A);
1785#endif 3057#endif
1786#if EV_USE_SELECT 3058#if EV_USE_SELECT
1787 if (backend == EVBACKEND_SELECT) select_destroy (EV_A); 3059 if (backend == EVBACKEND_SELECT ) select_destroy (EV_A);
1788#endif 3060#endif
1789 3061
1790 for (i = NUMPRI; i--; ) 3062 for (i = NUMPRI; i--; )
1791 { 3063 {
1792 array_free (pending, [i]); 3064 array_free (pending, [i]);
… …
1805 array_free (periodic, EMPTY); 3077 array_free (periodic, EMPTY);
1806#endif 3078#endif
1807#if EV_FORK_ENABLE 3079#if EV_FORK_ENABLE
1808 array_free (fork, EMPTY); 3080 array_free (fork, EMPTY);
1809#endif 3081#endif
3082#if EV_CLEANUP_ENABLE
3083 array_free (cleanup, EMPTY);
3084#endif
1810 array_free (prepare, EMPTY); 3085 array_free (prepare, EMPTY);
1811 array_free (check, EMPTY); 3086 array_free (check, EMPTY);
1812#if EV_ASYNC_ENABLE 3087#if EV_ASYNC_ENABLE
1813 array_free (async, EMPTY); 3088 array_free (async, EMPTY);
1814#endif 3089#endif
1815 3090
1816 backend = 0; 3091 backend = 0;
3092
3093#if EV_MULTIPLICITY
3094 if (ev_is_default_loop (EV_A))
3095#endif
3096 ev_default_loop_ptr = 0;
3097#if EV_MULTIPLICITY
3098 else
3099 ev_free (EV_A);
3100#endif
1817} 3101}
1818 3102
1819#if EV_USE_INOTIFY 3103#if EV_USE_INOTIFY
1820inline_size void infy_fork (EV_P); 3104inline_size void infy_fork (EV_P);
1821#endif 3105#endif
1822 3106
1823inline_size void 3107inline_size void
1824loop_fork (EV_P) 3108loop_fork (EV_P)
1825{ 3109{
1826#if EV_USE_PORT 3110#if EV_USE_PORT
1827 if (backend == EVBACKEND_PORT ) port_fork (EV_A); 3111 if (backend == EVBACKEND_PORT ) port_fork (EV_A);
1828#endif 3112#endif
1829#if EV_USE_KQUEUE 3113#if EV_USE_KQUEUE
1830 if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A); 3114 if (backend == EVBACKEND_KQUEUE ) kqueue_fork (EV_A);
3115#endif
3116#if EV_USE_LINUXAIO
3117 if (backend == EVBACKEND_LINUXAIO) linuxaio_fork (EV_A);
1831#endif 3118#endif
1832#if EV_USE_EPOLL 3119#if EV_USE_EPOLL
1833 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A); 3120 if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
1834#endif 3121#endif
1835#if EV_USE_INOTIFY 3122#if EV_USE_INOTIFY
1836 infy_fork (EV_A); 3123 infy_fork (EV_A);
1837#endif 3124#endif
1838 3125
3126#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1839 if (ev_is_active (&pipe_w)) 3127 if (ev_is_active (&pipe_w) && postfork != 2)
1840 { 3128 {
1841 /* this "locks" the handlers against writing to the pipe */ 3129 /* pipe_write_wanted must be false now, so modifying fd vars should be safe */
1842 /* while we modify the fd vars */
1843 sig_pending = 1;
1844#if EV_ASYNC_ENABLE
1845 async_pending = 1;
1846#endif
1847 3130
1848 ev_ref (EV_A); 3131 ev_ref (EV_A);
1849 ev_io_stop (EV_A_ &pipe_w); 3132 ev_io_stop (EV_A_ &pipe_w);
1850 3133
1851#if EV_USE_EVENTFD
1852 if (evfd >= 0)
1853 close (evfd);
1854#endif
1855
1856 if (evpipe [0] >= 0) 3134 if (evpipe [0] >= 0)
1857 {
1858 EV_WIN32_CLOSE_FD (evpipe [0]); 3135 EV_WIN32_CLOSE_FD (evpipe [0]);
1859 EV_WIN32_CLOSE_FD (evpipe [1]);
1860 }
1861 3136
1862#if EV_SIGNAL_ENABLE || EV_ASYNC_ENABLE
1863 evpipe_init (EV_A); 3137 evpipe_init (EV_A);
1864 /* now iterate over everything, in case we missed something */ 3138 /* iterate over everything, in case we missed something before */
1865 pipecb (EV_A_ &pipe_w, EV_READ); 3139 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
1866#endif
1867 } 3140 }
3141#endif
1868 3142
1869 postfork = 0; 3143 postfork = 0;
1870} 3144}
1871 3145
1872#if EV_MULTIPLICITY 3146#if EV_MULTIPLICITY
1873 3147
3148ecb_cold
1874struct ev_loop * 3149struct ev_loop *
1875ev_loop_new (unsigned int flags) 3150ev_loop_new (unsigned int flags) EV_NOEXCEPT
1876{ 3151{
1877 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop)); 3152 EV_P = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
1878 3153
1879 memset (EV_A, 0, sizeof (struct ev_loop)); 3154 memset (EV_A, 0, sizeof (struct ev_loop));
1880 loop_init (EV_A_ flags); 3155 loop_init (EV_A_ flags);
1881 3156
1882 if (ev_backend (EV_A)) 3157 if (ev_backend (EV_A))
1883 return EV_A; 3158 return EV_A;
1884 3159
3160 ev_free (EV_A);
1885 return 0; 3161 return 0;
1886} 3162}
1887 3163
1888void
1889ev_loop_destroy (EV_P)
1890{
1891 loop_destroy (EV_A);
1892 ev_free (loop);
1893}
1894
1895void
1896ev_loop_fork (EV_P)
1897{
1898 postfork = 1; /* must be in line with ev_default_fork */
1899}
1900#endif /* multiplicity */ 3164#endif /* multiplicity */
1901 3165
1902#if EV_VERIFY 3166#if EV_VERIFY
1903static void noinline 3167noinline ecb_cold
3168static void
1904verify_watcher (EV_P_ W w) 3169verify_watcher (EV_P_ W w)
1905{ 3170{
1906 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI)); 3171 assert (("libev: watcher has invalid priority", ABSPRI (w) >= 0 && ABSPRI (w) < NUMPRI));
1907 3172
1908 if (w->pending) 3173 if (w->pending)
1909 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w)); 3174 assert (("libev: pending watcher not on pending queue", pendings [ABSPRI (w)][w->pending - 1].w == w));
1910} 3175}
1911 3176
1912static void noinline 3177noinline ecb_cold
3178static void
1913verify_heap (EV_P_ ANHE *heap, int N) 3179verify_heap (EV_P_ ANHE *heap, int N)
1914{ 3180{
1915 int i; 3181 int i;
1916 3182
1917 for (i = HEAP0; i < N + HEAP0; ++i) 3183 for (i = HEAP0; i < N + HEAP0; ++i)
… …
1922 3188
1923 verify_watcher (EV_A_ (W)ANHE_w (heap [i])); 3189 verify_watcher (EV_A_ (W)ANHE_w (heap [i]));
1924 } 3190 }
1925} 3191}
1926 3192
1927static void noinline 3193noinline ecb_cold
3194static void
1928array_verify (EV_P_ W *ws, int cnt) 3195array_verify (EV_P_ W *ws, int cnt)
1929{ 3196{
1930 while (cnt--) 3197 while (cnt--)
1931 { 3198 {
1932 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1)); 3199 assert (("libev: active index mismatch", ev_active (ws [cnt]) == cnt + 1));
… …
1934 } 3201 }
1935} 3202}
1936#endif 3203#endif
1937 3204
1938#if EV_FEATURE_API 3205#if EV_FEATURE_API
1939void 3206void ecb_cold
1940ev_verify (EV_P) 3207ev_verify (EV_P) EV_NOEXCEPT
1941{ 3208{
1942#if EV_VERIFY 3209#if EV_VERIFY
1943 int i; 3210 int i;
1944 WL w; 3211 WL w, w2;
1945 3212
1946 assert (activecnt >= -1); 3213 assert (activecnt >= -1);
1947 3214
1948 assert (fdchangemax >= fdchangecnt); 3215 assert (fdchangemax >= fdchangecnt);
1949 for (i = 0; i < fdchangecnt; ++i) 3216 for (i = 0; i < fdchangecnt; ++i)
1950 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0)); 3217 assert (("libev: negative fd in fdchanges", fdchanges [i] >= 0));
1951 3218
1952 assert (anfdmax >= 0); 3219 assert (anfdmax >= 0);
1953 for (i = 0; i < anfdmax; ++i) 3220 for (i = 0; i < anfdmax; ++i)
3221 {
3222 int j = 0;
3223
1954 for (w = anfds [i].head; w; w = w->next) 3224 for (w = w2 = anfds [i].head; w; w = w->next)
1955 { 3225 {
1956 verify_watcher (EV_A_ (W)w); 3226 verify_watcher (EV_A_ (W)w);
3227
3228 if (j++ & 1)
3229 {
3230 assert (("libev: io watcher list contains a loop", w != w2));
3231 w2 = w2->next;
3232 }
3233
1957 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1)); 3234 assert (("libev: inactive fd watcher on anfd list", ev_active (w) == 1));
1958 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i)); 3235 assert (("libev: fd mismatch between watcher and anfd", ((ev_io *)w)->fd == i));
1959 } 3236 }
3237 }
1960 3238
1961 assert (timermax >= timercnt); 3239 assert (timermax >= timercnt);
1962 verify_heap (EV_A_ timers, timercnt); 3240 verify_heap (EV_A_ timers, timercnt);
1963 3241
1964#if EV_PERIODIC_ENABLE 3242#if EV_PERIODIC_ENABLE
… …
1979#if EV_FORK_ENABLE 3257#if EV_FORK_ENABLE
1980 assert (forkmax >= forkcnt); 3258 assert (forkmax >= forkcnt);
1981 array_verify (EV_A_ (W *)forks, forkcnt); 3259 array_verify (EV_A_ (W *)forks, forkcnt);
1982#endif 3260#endif
1983 3261
3262#if EV_CLEANUP_ENABLE
3263 assert (cleanupmax >= cleanupcnt);
3264 array_verify (EV_A_ (W *)cleanups, cleanupcnt);
3265#endif
3266
1984#if EV_ASYNC_ENABLE 3267#if EV_ASYNC_ENABLE
1985 assert (asyncmax >= asynccnt); 3268 assert (asyncmax >= asynccnt);
1986 array_verify (EV_A_ (W *)asyncs, asynccnt); 3269 array_verify (EV_A_ (W *)asyncs, asynccnt);
1987#endif 3270#endif
1988 3271
… …
2005#endif 3288#endif
2006} 3289}
2007#endif 3290#endif
2008 3291
2009#if EV_MULTIPLICITY 3292#if EV_MULTIPLICITY
3293ecb_cold
2010struct ev_loop * 3294struct ev_loop *
2011ev_default_loop_init (unsigned int flags)
2012#else 3295#else
2013int 3296int
3297#endif
2014ev_default_loop (unsigned int flags) 3298ev_default_loop (unsigned int flags) EV_NOEXCEPT
2015#endif
2016{ 3299{
2017 if (!ev_default_loop_ptr) 3300 if (!ev_default_loop_ptr)
2018 { 3301 {
2019#if EV_MULTIPLICITY 3302#if EV_MULTIPLICITY
2020 EV_P = ev_default_loop_ptr = &default_loop_struct; 3303 EV_P = ev_default_loop_ptr = &default_loop_struct;
… …
2039 3322
2040 return ev_default_loop_ptr; 3323 return ev_default_loop_ptr;
2041} 3324}
2042 3325
2043void 3326void
2044ev_default_destroy (void) 3327ev_loop_fork (EV_P) EV_NOEXCEPT
2045{ 3328{
2046#if EV_MULTIPLICITY 3329 postfork = 1;
2047 EV_P = ev_default_loop_ptr;
2048#endif
2049
2050 ev_default_loop_ptr = 0;
2051
2052#if EV_CHILD_ENABLE
2053 ev_ref (EV_A); /* child watcher */
2054 ev_signal_stop (EV_A_ &childev);
2055#endif
2056
2057 loop_destroy (EV_A);
2058}
2059
2060void
2061ev_default_fork (void)
2062{
2063#if EV_MULTIPLICITY
2064 EV_P = ev_default_loop_ptr;
2065#endif
2066
2067 postfork = 1; /* must be in line with ev_loop_fork */
2068} 3330}
2069 3331
2070/*****************************************************************************/ 3332/*****************************************************************************/
2071 3333
2072void 3334void
… …
2074{ 3336{
2075 EV_CB_INVOKE ((W)w, revents); 3337 EV_CB_INVOKE ((W)w, revents);
2076} 3338}
2077 3339
2078unsigned int 3340unsigned int
2079ev_pending_count (EV_P) 3341ev_pending_count (EV_P) EV_NOEXCEPT
2080{ 3342{
2081 int pri; 3343 int pri;
2082 unsigned int count = 0; 3344 unsigned int count = 0;
2083 3345
2084 for (pri = NUMPRI; pri--; ) 3346 for (pri = NUMPRI; pri--; )
2085 count += pendingcnt [pri]; 3347 count += pendingcnt [pri];
2086 3348
2087 return count; 3349 return count;
2088} 3350}
2089 3351
2090void noinline 3352noinline
3353void
2091ev_invoke_pending (EV_P) 3354ev_invoke_pending (EV_P)
2092{ 3355{
2093 int pri; 3356 pendingpri = NUMPRI;
2094 3357
2095 for (pri = NUMPRI; pri--; ) 3358 do
3359 {
3360 --pendingpri;
3361
3362 /* pendingpri possibly gets modified in the inner loop */
2096 while (pendingcnt [pri]) 3363 while (pendingcnt [pendingpri])
2097 { 3364 {
2098 ANPENDING *p = pendings [pri] + --pendingcnt [pri]; 3365 ANPENDING *p = pendings [pendingpri] + --pendingcnt [pendingpri];
2099 3366
2100 /*assert (("libev: non-pending watcher on pending list", p->w->pending));*/
2101 /* ^ this is no longer true, as pending_w could be here */
2102
2103 p->w->pending = 0; 3367 p->w->pending = 0;
2104 EV_CB_INVOKE (p->w, p->events); 3368 EV_CB_INVOKE (p->w, p->events);
2105 EV_FREQUENT_CHECK; 3369 EV_FREQUENT_CHECK;
2106 } 3370 }
3371 }
3372 while (pendingpri);
2107} 3373}
2108 3374
2109#if EV_IDLE_ENABLE 3375#if EV_IDLE_ENABLE
2110/* make idle watchers pending. this handles the "call-idle */ 3376/* make idle watchers pending. this handles the "call-idle */
2111/* only when higher priorities are idle" logic */ 3377/* only when higher priorities are idle" logic */
… …
2168 feed_reverse_done (EV_A_ EV_TIMER); 3434 feed_reverse_done (EV_A_ EV_TIMER);
2169 } 3435 }
2170} 3436}
2171 3437
2172#if EV_PERIODIC_ENABLE 3438#if EV_PERIODIC_ENABLE
3439
3440noinline
3441static void
3442periodic_recalc (EV_P_ ev_periodic *w)
3443{
3444 ev_tstamp interval = w->interval > MIN_INTERVAL ? w->interval : MIN_INTERVAL;
3445 ev_tstamp at = w->offset + interval * ev_floor ((ev_rt_now - w->offset) / interval);
3446
3447 /* the above almost always errs on the low side */
3448 while (at <= ev_rt_now)
3449 {
3450 ev_tstamp nat = at + w->interval;
3451
3452 /* when resolution fails us, we use ev_rt_now */
3453 if (expect_false (nat == at))
3454 {
3455 at = ev_rt_now;
3456 break;
3457 }
3458
3459 at = nat;
3460 }
3461
3462 ev_at (w) = at;
3463}
3464
2173/* make periodics pending */ 3465/* make periodics pending */
2174inline_size void 3466inline_size void
2175periodics_reify (EV_P) 3467periodics_reify (EV_P)
2176{ 3468{
2177 EV_FREQUENT_CHECK; 3469 EV_FREQUENT_CHECK;
2178 3470
2179 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now) 3471 while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
2180 { 3472 {
2181 int feed_count = 0;
2182
2183 do 3473 do
2184 { 3474 {
2185 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]); 3475 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [HEAP0]);
2186 3476
2187 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/ 3477 /*assert (("libev: inactive timer on periodic heap detected", ev_is_active (w)));*/
… …
2196 ANHE_at_cache (periodics [HEAP0]); 3486 ANHE_at_cache (periodics [HEAP0]);
2197 downheap (periodics, periodiccnt, HEAP0); 3487 downheap (periodics, periodiccnt, HEAP0);
2198 } 3488 }
2199 else if (w->interval) 3489 else if (w->interval)
2200 { 3490 {
2201 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3491 periodic_recalc (EV_A_ w);
2202 /* if next trigger time is not sufficiently in the future, put it there */
2203 /* this might happen because of floating point inexactness */
2204 if (ev_at (w) - ev_rt_now < TIME_EPSILON)
2205 {
2206 ev_at (w) += w->interval;
2207
2208 /* if interval is unreasonably low we might still have a time in the past */
2209 /* so correct this. this will make the periodic very inexact, but the user */
2210 /* has effectively asked to get triggered more often than possible */
2211 if (ev_at (w) < ev_rt_now)
2212 ev_at (w) = ev_rt_now;
2213 }
2214
2215 ANHE_at_cache (periodics [HEAP0]); 3492 ANHE_at_cache (periodics [HEAP0]);
2216 downheap (periodics, periodiccnt, HEAP0); 3493 downheap (periodics, periodiccnt, HEAP0);
2217 } 3494 }
2218 else 3495 else
2219 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */ 3496 ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
… …
2227 } 3504 }
2228} 3505}
2229 3506
2230/* simply recalculate all periodics */ 3507/* simply recalculate all periodics */
2231/* TODO: maybe ensure that at least one event happens when jumping forward? */ 3508/* TODO: maybe ensure that at least one event happens when jumping forward? */
2232static void noinline 3509noinline ecb_cold
3510static void
2233periodics_reschedule (EV_P) 3511periodics_reschedule (EV_P)
2234{ 3512{
2235 int i; 3513 int i;
2236 3514
2237 /* adjust periodics after time jump */ 3515 /* adjust periodics after time jump */
… …
2240 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]); 3518 ev_periodic *w = (ev_periodic *)ANHE_w (periodics [i]);
2241 3519
2242 if (w->reschedule_cb) 3520 if (w->reschedule_cb)
2243 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 3521 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2244 else if (w->interval) 3522 else if (w->interval)
2245 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval; 3523 periodic_recalc (EV_A_ w);
2246 3524
2247 ANHE_at_cache (periodics [i]); 3525 ANHE_at_cache (periodics [i]);
2248 } 3526 }
2249 3527
2250 reheap (periodics, periodiccnt); 3528 reheap (periodics, periodiccnt);
2251} 3529}
2252#endif 3530#endif
2253 3531
2254/* adjust all timers by a given offset */ 3532/* adjust all timers by a given offset */
2255static void noinline 3533noinline ecb_cold
3534static void
2256timers_reschedule (EV_P_ ev_tstamp adjust) 3535timers_reschedule (EV_P_ ev_tstamp adjust)
2257{ 3536{
2258 int i; 3537 int i;
2259 3538
2260 for (i = 0; i < timercnt; ++i) 3539 for (i = 0; i < timercnt; ++i)
… …
2297 * doesn't hurt either as we only do this on time-jumps or 3576 * doesn't hurt either as we only do this on time-jumps or
2298 * in the unlikely event of having been preempted here. 3577 * in the unlikely event of having been preempted here.
2299 */ 3578 */
2300 for (i = 4; --i; ) 3579 for (i = 4; --i; )
2301 { 3580 {
3581 ev_tstamp diff;
2302 rtmn_diff = ev_rt_now - mn_now; 3582 rtmn_diff = ev_rt_now - mn_now;
2303 3583
3584 diff = odiff - rtmn_diff;
3585
2304 if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)) 3586 if (expect_true ((diff < 0. ? -diff : diff) < MIN_TIMEJUMP))
2305 return; /* all is well */ 3587 return; /* all is well */
2306 3588
2307 ev_rt_now = ev_time (); 3589 ev_rt_now = ev_time ();
2308 mn_now = get_clock (); 3590 mn_now = get_clock ();
2309 now_floor = mn_now; 3591 now_floor = mn_now;
… …
2331 3613
2332 mn_now = ev_rt_now; 3614 mn_now = ev_rt_now;
2333 } 3615 }
2334} 3616}
2335 3617
2336void 3618int
2337ev_run (EV_P_ int flags) 3619ev_run (EV_P_ int flags)
2338{ 3620{
2339#if EV_FEATURE_API 3621#if EV_FEATURE_API
2340 ++loop_depth; 3622 ++loop_depth;
2341#endif 3623#endif
… …
2399 ev_tstamp prev_mn_now = mn_now; 3681 ev_tstamp prev_mn_now = mn_now;
2400 3682
2401 /* update time to cancel out callback processing overhead */ 3683 /* update time to cancel out callback processing overhead */
2402 time_update (EV_A_ 1e100); 3684 time_update (EV_A_ 1e100);
2403 3685
3686 /* from now on, we want a pipe-wake-up */
3687 pipe_write_wanted = 1;
3688
3689 ECB_MEMORY_FENCE; /* make sure pipe_write_wanted is visible before we check for potential skips */
3690
2404 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt))) 3691 if (expect_true (!(flags & EVRUN_NOWAIT || idleall || !activecnt || pipe_write_skipped)))
2405 { 3692 {
2406 waittime = MAX_BLOCKTIME; 3693 waittime = MAX_BLOCKTIME;
2407 3694
2408 if (timercnt) 3695 if (timercnt)
2409 { 3696 {
2410 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge; 3697 ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now;
2411 if (waittime > to) waittime = to; 3698 if (waittime > to) waittime = to;
2412 } 3699 }
2413 3700
2414#if EV_PERIODIC_ENABLE 3701#if EV_PERIODIC_ENABLE
2415 if (periodiccnt) 3702 if (periodiccnt)
2416 { 3703 {
2417 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge; 3704 ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now;
2418 if (waittime > to) waittime = to; 3705 if (waittime > to) waittime = to;
2419 } 3706 }
2420#endif 3707#endif
2421 3708
2422 /* don't let timeouts decrease the waittime below timeout_blocktime */ 3709 /* don't let timeouts decrease the waittime below timeout_blocktime */
2423 if (expect_false (waittime < timeout_blocktime)) 3710 if (expect_false (waittime < timeout_blocktime))
2424 waittime = timeout_blocktime; 3711 waittime = timeout_blocktime;
3712
3713 /* at this point, we NEED to wait, so we have to ensure */
3714 /* to pass a minimum nonzero value to the backend */
3715 if (expect_false (waittime < backend_mintime))
3716 waittime = backend_mintime;
2425 3717
2426 /* extra check because io_blocktime is commonly 0 */ 3718 /* extra check because io_blocktime is commonly 0 */
2427 if (expect_false (io_blocktime)) 3719 if (expect_false (io_blocktime))
2428 { 3720 {
2429 sleeptime = io_blocktime - (mn_now - prev_mn_now); 3721 sleeptime = io_blocktime - (mn_now - prev_mn_now);
2430 3722
2431 if (sleeptime > waittime - backend_fudge) 3723 if (sleeptime > waittime - backend_mintime)
2432 sleeptime = waittime - backend_fudge; 3724 sleeptime = waittime - backend_mintime;
2433 3725
2434 if (expect_true (sleeptime > 0.)) 3726 if (expect_true (sleeptime > 0.))
2435 { 3727 {
2436 ev_sleep (sleeptime); 3728 ev_sleep (sleeptime);
2437 waittime -= sleeptime; 3729 waittime -= sleeptime;
… …
2444#endif 3736#endif
2445 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */ 3737 assert ((loop_done = EVBREAK_RECURSE, 1)); /* assert for side effect */
2446 backend_poll (EV_A_ waittime); 3738 backend_poll (EV_A_ waittime);
2447 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */ 3739 assert ((loop_done = EVBREAK_CANCEL, 1)); /* assert for side effect */
2448 3740
3741 pipe_write_wanted = 0; /* just an optimisation, no fence needed */
3742
3743 ECB_MEMORY_FENCE_ACQUIRE;
3744 if (pipe_write_skipped)
3745 {
3746 assert (("libev: pipe_w not active, but pipe not written", ev_is_active (&pipe_w)));
3747 ev_feed_event (EV_A_ &pipe_w, EV_CUSTOM);
3748 }
3749
3750
2449 /* update ev_rt_now, do magic */ 3751 /* update ev_rt_now, do magic */
2450 time_update (EV_A_ waittime + sleeptime); 3752 time_update (EV_A_ waittime + sleeptime);
2451 } 3753 }
2452 3754
2453 /* queue pending timers and reschedule them */ 3755 /* queue pending timers and reschedule them */
… …
2479 loop_done = EVBREAK_CANCEL; 3781 loop_done = EVBREAK_CANCEL;
2480 3782
2481#if EV_FEATURE_API 3783#if EV_FEATURE_API
2482 --loop_depth; 3784 --loop_depth;
2483#endif 3785#endif
2484}
2485 3786
3787 return activecnt;
3788}
3789
2486void 3790void
2487ev_break (EV_P_ int how) 3791ev_break (EV_P_ int how) EV_NOEXCEPT
2488{ 3792{
2489 loop_done = how; 3793 loop_done = how;
2490} 3794}
2491 3795
2492void 3796void
2493ev_ref (EV_P) 3797ev_ref (EV_P) EV_NOEXCEPT
2494{ 3798{
2495 ++activecnt; 3799 ++activecnt;
2496} 3800}
2497 3801
2498void 3802void
2499ev_unref (EV_P) 3803ev_unref (EV_P) EV_NOEXCEPT
2500{ 3804{
2501 --activecnt; 3805 --activecnt;
2502} 3806}
2503 3807
2504void 3808void
2505ev_now_update (EV_P) 3809ev_now_update (EV_P) EV_NOEXCEPT
2506{ 3810{
2507 time_update (EV_A_ 1e100); 3811 time_update (EV_A_ 1e100);
2508} 3812}
2509 3813
2510void 3814void
2511ev_suspend (EV_P) 3815ev_suspend (EV_P) EV_NOEXCEPT
2512{ 3816{
2513 ev_now_update (EV_A); 3817 ev_now_update (EV_A);
2514} 3818}
2515 3819
2516void 3820void
2517ev_resume (EV_P) 3821ev_resume (EV_P) EV_NOEXCEPT
2518{ 3822{
2519 ev_tstamp mn_prev = mn_now; 3823 ev_tstamp mn_prev = mn_now;
2520 3824
2521 ev_now_update (EV_A); 3825 ev_now_update (EV_A);
2522 timers_reschedule (EV_A_ mn_now - mn_prev); 3826 timers_reschedule (EV_A_ mn_now - mn_prev);
… …
2561 w->pending = 0; 3865 w->pending = 0;
2562 } 3866 }
2563} 3867}
2564 3868
2565int 3869int
2566ev_clear_pending (EV_P_ void *w) 3870ev_clear_pending (EV_P_ void *w) EV_NOEXCEPT
2567{ 3871{
2568 W w_ = (W)w; 3872 W w_ = (W)w;
2569 int pending = w_->pending; 3873 int pending = w_->pending;
2570 3874
2571 if (expect_true (pending)) 3875 if (expect_true (pending))
… …
2603 w->active = 0; 3907 w->active = 0;
2604} 3908}
2605 3909
2606/*****************************************************************************/ 3910/*****************************************************************************/
2607 3911
2608void noinline 3912noinline
3913void
2609ev_io_start (EV_P_ ev_io *w) 3914ev_io_start (EV_P_ ev_io *w) EV_NOEXCEPT
2610{ 3915{
2611 int fd = w->fd; 3916 int fd = w->fd;
2612 3917
2613 if (expect_false (ev_is_active (w))) 3918 if (expect_false (ev_is_active (w)))
2614 return; 3919 return;
… …
2617 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE)))); 3922 assert (("libev: ev_io_start called with illegal event mask", !(w->events & ~(EV__IOFDSET | EV_READ | EV_WRITE))));
2618 3923
2619 EV_FREQUENT_CHECK; 3924 EV_FREQUENT_CHECK;
2620 3925
2621 ev_start (EV_A_ (W)w, 1); 3926 ev_start (EV_A_ (W)w, 1);
2622 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_init_zero); 3927 array_needsize (ANFD, anfds, anfdmax, fd + 1, array_needsize_zerofill);
2623 wlist_add (&anfds[fd].head, (WL)w); 3928 wlist_add (&anfds[fd].head, (WL)w);
3929
3930 /* common bug, apparently */
3931 assert (("libev: ev_io_start called with corrupted watcher", ((WL)w)->next != (WL)w));
2624 3932
2625 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY); 3933 fd_change (EV_A_ fd, w->events & EV__IOFDSET | EV_ANFD_REIFY);
2626 w->events &= ~EV__IOFDSET; 3934 w->events &= ~EV__IOFDSET;
2627 3935
2628 EV_FREQUENT_CHECK; 3936 EV_FREQUENT_CHECK;
2629} 3937}
2630 3938
2631void noinline 3939noinline
3940void
2632ev_io_stop (EV_P_ ev_io *w) 3941ev_io_stop (EV_P_ ev_io *w) EV_NOEXCEPT
2633{ 3942{
2634 clear_pending (EV_A_ (W)w); 3943 clear_pending (EV_A_ (W)w);
2635 if (expect_false (!ev_is_active (w))) 3944 if (expect_false (!ev_is_active (w)))
2636 return; 3945 return;
2637 3946
… …
2645 fd_change (EV_A_ w->fd, EV_ANFD_REIFY); 3954 fd_change (EV_A_ w->fd, EV_ANFD_REIFY);
2646 3955
2647 EV_FREQUENT_CHECK; 3956 EV_FREQUENT_CHECK;
2648} 3957}
2649 3958
2650void noinline 3959noinline
3960void
2651ev_timer_start (EV_P_ ev_timer *w) 3961ev_timer_start (EV_P_ ev_timer *w) EV_NOEXCEPT
2652{ 3962{
2653 if (expect_false (ev_is_active (w))) 3963 if (expect_false (ev_is_active (w)))
2654 return; 3964 return;
2655 3965
2656 ev_at (w) += mn_now; 3966 ev_at (w) += mn_now;
… …
2659 3969
2660 EV_FREQUENT_CHECK; 3970 EV_FREQUENT_CHECK;
2661 3971
2662 ++timercnt; 3972 ++timercnt;
2663 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1); 3973 ev_start (EV_A_ (W)w, timercnt + HEAP0 - 1);
2664 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2); 3974 array_needsize (ANHE, timers, timermax, ev_active (w) + 1, array_needsize_noinit);
2665 ANHE_w (timers [ev_active (w)]) = (WT)w; 3975 ANHE_w (timers [ev_active (w)]) = (WT)w;
2666 ANHE_at_cache (timers [ev_active (w)]); 3976 ANHE_at_cache (timers [ev_active (w)]);
2667 upheap (timers, ev_active (w)); 3977 upheap (timers, ev_active (w));
2668 3978
2669 EV_FREQUENT_CHECK; 3979 EV_FREQUENT_CHECK;
2670 3980
2671 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/ 3981 /*assert (("libev: internal timer heap corruption", timers [ev_active (w)] == (WT)w));*/
2672} 3982}
2673 3983
2674void noinline 3984noinline
3985void
2675ev_timer_stop (EV_P_ ev_timer *w) 3986ev_timer_stop (EV_P_ ev_timer *w) EV_NOEXCEPT
2676{ 3987{
2677 clear_pending (EV_A_ (W)w); 3988 clear_pending (EV_A_ (W)w);
2678 if (expect_false (!ev_is_active (w))) 3989 if (expect_false (!ev_is_active (w)))
2679 return; 3990 return;
2680 3991
… …
2699 ev_stop (EV_A_ (W)w); 4010 ev_stop (EV_A_ (W)w);
2700 4011
2701 EV_FREQUENT_CHECK; 4012 EV_FREQUENT_CHECK;
2702} 4013}
2703 4014
2704void noinline 4015noinline
4016void
2705ev_timer_again (EV_P_ ev_timer *w) 4017ev_timer_again (EV_P_ ev_timer *w) EV_NOEXCEPT
2706{ 4018{
2707 EV_FREQUENT_CHECK; 4019 EV_FREQUENT_CHECK;
4020
4021 clear_pending (EV_A_ (W)w);
2708 4022
2709 if (ev_is_active (w)) 4023 if (ev_is_active (w))
2710 { 4024 {
2711 if (w->repeat) 4025 if (w->repeat)
2712 { 4026 {
… …
2725 4039
2726 EV_FREQUENT_CHECK; 4040 EV_FREQUENT_CHECK;
2727} 4041}
2728 4042
2729ev_tstamp 4043ev_tstamp
2730ev_timer_remaining (EV_P_ ev_timer *w) 4044ev_timer_remaining (EV_P_ ev_timer *w) EV_NOEXCEPT
2731{ 4045{
2732 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.); 4046 return ev_at (w) - (ev_is_active (w) ? mn_now : 0.);
2733} 4047}
2734 4048
2735#if EV_PERIODIC_ENABLE 4049#if EV_PERIODIC_ENABLE
2736void noinline 4050noinline
4051void
2737ev_periodic_start (EV_P_ ev_periodic *w) 4052ev_periodic_start (EV_P_ ev_periodic *w) EV_NOEXCEPT
2738{ 4053{
2739 if (expect_false (ev_is_active (w))) 4054 if (expect_false (ev_is_active (w)))
2740 return; 4055 return;
2741 4056
2742 if (w->reschedule_cb) 4057 if (w->reschedule_cb)
2743 ev_at (w) = w->reschedule_cb (w, ev_rt_now); 4058 ev_at (w) = w->reschedule_cb (w, ev_rt_now);
2744 else if (w->interval) 4059 else if (w->interval)
2745 { 4060 {
2746 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.)); 4061 assert (("libev: ev_periodic_start called with negative interval value", w->interval >= 0.));
2747 /* this formula differs from the one in periodic_reify because we do not always round up */ 4062 periodic_recalc (EV_A_ w);
2748 ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
2749 } 4063 }
2750 else 4064 else
2751 ev_at (w) = w->offset; 4065 ev_at (w) = w->offset;
2752 4066
2753 EV_FREQUENT_CHECK; 4067 EV_FREQUENT_CHECK;
2754 4068
2755 ++periodiccnt; 4069 ++periodiccnt;
2756 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1); 4070 ev_start (EV_A_ (W)w, periodiccnt + HEAP0 - 1);
2757 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2); 4071 array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, array_needsize_noinit);
2758 ANHE_w (periodics [ev_active (w)]) = (WT)w; 4072 ANHE_w (periodics [ev_active (w)]) = (WT)w;
2759 ANHE_at_cache (periodics [ev_active (w)]); 4073 ANHE_at_cache (periodics [ev_active (w)]);
2760 upheap (periodics, ev_active (w)); 4074 upheap (periodics, ev_active (w));
2761 4075
2762 EV_FREQUENT_CHECK; 4076 EV_FREQUENT_CHECK;
2763 4077
2764 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/ 4078 /*assert (("libev: internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));*/
2765} 4079}
2766 4080
2767void noinline 4081noinline
4082void
2768ev_periodic_stop (EV_P_ ev_periodic *w) 4083ev_periodic_stop (EV_P_ ev_periodic *w) EV_NOEXCEPT
2769{ 4084{
2770 clear_pending (EV_A_ (W)w); 4085 clear_pending (EV_A_ (W)w);
2771 if (expect_false (!ev_is_active (w))) 4086 if (expect_false (!ev_is_active (w)))
2772 return; 4087 return;
2773 4088
… …
2790 ev_stop (EV_A_ (W)w); 4105 ev_stop (EV_A_ (W)w);
2791 4106
2792 EV_FREQUENT_CHECK; 4107 EV_FREQUENT_CHECK;
2793} 4108}
2794 4109
2795void noinline 4110noinline
4111void
2796ev_periodic_again (EV_P_ ev_periodic *w) 4112ev_periodic_again (EV_P_ ev_periodic *w) EV_NOEXCEPT
2797{ 4113{
2798 /* TODO: use adjustheap and recalculation */ 4114 /* TODO: use adjustheap and recalculation */
2799 ev_periodic_stop (EV_A_ w); 4115 ev_periodic_stop (EV_A_ w);
2800 ev_periodic_start (EV_A_ w); 4116 ev_periodic_start (EV_A_ w);
2801} 4117}
… …
2805# define SA_RESTART 0 4121# define SA_RESTART 0
2806#endif 4122#endif
2807 4123
2808#if EV_SIGNAL_ENABLE 4124#if EV_SIGNAL_ENABLE
2809 4125
2810void noinline 4126noinline
4127void
2811ev_signal_start (EV_P_ ev_signal *w) 4128ev_signal_start (EV_P_ ev_signal *w) EV_NOEXCEPT
2812{ 4129{
2813 if (expect_false (ev_is_active (w))) 4130 if (expect_false (ev_is_active (w)))
2814 return; 4131 return;
2815 4132
2816 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG)); 4133 assert (("libev: ev_signal_start called with illegal signal number", w->signum > 0 && w->signum < EV_NSIG));
… …
2818#if EV_MULTIPLICITY 4135#if EV_MULTIPLICITY
2819 assert (("libev: a signal must not be attached to two different loops", 4136 assert (("libev: a signal must not be attached to two different loops",
2820 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop)); 4137 !signals [w->signum - 1].loop || signals [w->signum - 1].loop == loop));
2821 4138
2822 signals [w->signum - 1].loop = EV_A; 4139 signals [w->signum - 1].loop = EV_A;
4140 ECB_MEMORY_FENCE_RELEASE;
2823#endif 4141#endif
2824 4142
2825 EV_FREQUENT_CHECK; 4143 EV_FREQUENT_CHECK;
2826 4144
2827#if EV_USE_SIGNALFD 4145#if EV_USE_SIGNALFD
… …
2874 sa.sa_handler = ev_sighandler; 4192 sa.sa_handler = ev_sighandler;
2875 sigfillset (&sa.sa_mask); 4193 sigfillset (&sa.sa_mask);
2876 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */ 4194 sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
2877 sigaction (w->signum, &sa, 0); 4195 sigaction (w->signum, &sa, 0);
2878 4196
4197 if (origflags & EVFLAG_NOSIGMASK)
4198 {
2879 sigemptyset (&sa.sa_mask); 4199 sigemptyset (&sa.sa_mask);
2880 sigaddset (&sa.sa_mask, w->signum); 4200 sigaddset (&sa.sa_mask, w->signum);
2881 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0); 4201 sigprocmask (SIG_UNBLOCK, &sa.sa_mask, 0);
4202 }
2882#endif 4203#endif
2883 } 4204 }
2884 4205
2885 EV_FREQUENT_CHECK; 4206 EV_FREQUENT_CHECK;
2886} 4207}
2887 4208
2888void noinline 4209noinline
4210void
2889ev_signal_stop (EV_P_ ev_signal *w) 4211ev_signal_stop (EV_P_ ev_signal *w) EV_NOEXCEPT
2890{ 4212{
2891 clear_pending (EV_A_ (W)w); 4213 clear_pending (EV_A_ (W)w);
2892 if (expect_false (!ev_is_active (w))) 4214 if (expect_false (!ev_is_active (w)))
2893 return; 4215 return;
2894 4216
… …
2925#endif 4247#endif
2926 4248
2927#if EV_CHILD_ENABLE 4249#if EV_CHILD_ENABLE
2928 4250
2929void 4251void
2930ev_child_start (EV_P_ ev_child *w) 4252ev_child_start (EV_P_ ev_child *w) EV_NOEXCEPT
2931{ 4253{
2932#if EV_MULTIPLICITY 4254#if EV_MULTIPLICITY
2933 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr)); 4255 assert (("libev: child watchers are only supported in the default loop", loop == ev_default_loop_ptr));
2934#endif 4256#endif
2935 if (expect_false (ev_is_active (w))) 4257 if (expect_false (ev_is_active (w)))
… …
2942 4264
2943 EV_FREQUENT_CHECK; 4265 EV_FREQUENT_CHECK;
2944} 4266}
2945 4267
2946void 4268void
2947ev_child_stop (EV_P_ ev_child *w) 4269ev_child_stop (EV_P_ ev_child *w) EV_NOEXCEPT
2948{ 4270{
2949 clear_pending (EV_A_ (W)w); 4271 clear_pending (EV_A_ (W)w);
2950 if (expect_false (!ev_is_active (w))) 4272 if (expect_false (!ev_is_active (w)))
2951 return; 4273 return;
2952 4274
… …
2969 4291
2970#define DEF_STAT_INTERVAL 5.0074891 4292#define DEF_STAT_INTERVAL 5.0074891
2971#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */ 4293#define NFS_STAT_INTERVAL 30.1074891 /* for filesystems potentially failing inotify */
2972#define MIN_STAT_INTERVAL 0.1074891 4294#define MIN_STAT_INTERVAL 0.1074891
2973 4295
2974static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents); 4296noinline static void stat_timer_cb (EV_P_ ev_timer *w_, int revents);
2975 4297
2976#if EV_USE_INOTIFY 4298#if EV_USE_INOTIFY
2977 4299
2978/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */ 4300/* the * 2 is to allow for alignment padding, which for some reason is >> 8 */
2979# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX) 4301# define EV_INOTIFY_BUFSIZE (sizeof (struct inotify_event) * 2 + NAME_MAX)
2980 4302
2981static void noinline 4303noinline
4304static void
2982infy_add (EV_P_ ev_stat *w) 4305infy_add (EV_P_ ev_stat *w)
2983{ 4306{
2984 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); 4307 w->wd = inotify_add_watch (fs_fd, w->path,
4308 IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY
4309 | IN_CREATE | IN_DELETE | IN_MOVED_FROM | IN_MOVED_TO
4310 | IN_DONT_FOLLOW | IN_MASK_ADD);
2985 4311
2986 if (w->wd >= 0) 4312 if (w->wd >= 0)
2987 { 4313 {
2988 struct statfs sfs; 4314 struct statfs sfs;
2989 4315
… …
2993 4319
2994 if (!fs_2625) 4320 if (!fs_2625)
2995 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL; 4321 w->timer.repeat = w->interval ? w->interval : DEF_STAT_INTERVAL;
2996 else if (!statfs (w->path, &sfs) 4322 else if (!statfs (w->path, &sfs)
2997 && (sfs.f_type == 0x1373 /* devfs */ 4323 && (sfs.f_type == 0x1373 /* devfs */
4324 || sfs.f_type == 0x4006 /* fat */
4325 || sfs.f_type == 0x4d44 /* msdos */
2998 || sfs.f_type == 0xEF53 /* ext2/3 */ 4326 || sfs.f_type == 0xEF53 /* ext2/3 */
4327 || sfs.f_type == 0x72b6 /* jffs2 */
4328 || sfs.f_type == 0x858458f6 /* ramfs */
4329 || sfs.f_type == 0x5346544e /* ntfs */
2999 || sfs.f_type == 0x3153464a /* jfs */ 4330 || sfs.f_type == 0x3153464a /* jfs */
4331 || sfs.f_type == 0x9123683e /* btrfs */
3000 || sfs.f_type == 0x52654973 /* reiser3 */ 4332 || sfs.f_type == 0x52654973 /* reiser3 */
3001 || sfs.f_type == 0x01021994 /* tempfs */ 4333 || sfs.f_type == 0x01021994 /* tmpfs */
3002 || sfs.f_type == 0x58465342 /* xfs */)) 4334 || sfs.f_type == 0x58465342 /* xfs */))
3003 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */ 4335 w->timer.repeat = 0.; /* filesystem is local, kernel new enough */
3004 else 4336 else
3005 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */ 4337 w->timer.repeat = w->interval ? w->interval : NFS_STAT_INTERVAL; /* remote, use reduced frequency */
3006 } 4338 }
… …
3027 if (!pend || pend == path) 4359 if (!pend || pend == path)
3028 break; 4360 break;
3029 4361
3030 *pend = 0; 4362 *pend = 0;
3031 w->wd = inotify_add_watch (fs_fd, path, mask); 4363 w->wd = inotify_add_watch (fs_fd, path, mask);
3032 } 4364 }
3033 while (w->wd < 0 && (errno == ENOENT || errno == EACCES)); 4365 while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
3034 } 4366 }
3035 } 4367 }
3036 4368
3037 if (w->wd >= 0) 4369 if (w->wd >= 0)
… …
3041 if (ev_is_active (&w->timer)) ev_ref (EV_A); 4373 if (ev_is_active (&w->timer)) ev_ref (EV_A);
3042 ev_timer_again (EV_A_ &w->timer); 4374 ev_timer_again (EV_A_ &w->timer);
3043 if (ev_is_active (&w->timer)) ev_unref (EV_A); 4375 if (ev_is_active (&w->timer)) ev_unref (EV_A);
3044} 4376}
3045 4377
3046static void noinline 4378noinline
4379static void
3047infy_del (EV_P_ ev_stat *w) 4380infy_del (EV_P_ ev_stat *w)
3048{ 4381{
3049 int slot; 4382 int slot;
3050 int wd = w->wd; 4383 int wd = w->wd;
3051 4384
… …
3058 4391
3059 /* remove this watcher, if others are watching it, they will rearm */ 4392 /* remove this watcher, if others are watching it, they will rearm */
3060 inotify_rm_watch (fs_fd, wd); 4393 inotify_rm_watch (fs_fd, wd);
3061} 4394}
3062 4395
3063static void noinline 4396noinline
4397static void
3064infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev) 4398infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
3065{ 4399{
3066 if (slot < 0) 4400 if (slot < 0)
3067 /* overflow, need to check for all hash slots */ 4401 /* overflow, need to check for all hash slots */
3068 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot) 4402 for (slot = 0; slot < (EV_INOTIFY_HASHSIZE); ++slot)
… …
3104 infy_wd (EV_A_ ev->wd, ev->wd, ev); 4438 infy_wd (EV_A_ ev->wd, ev->wd, ev);
3105 ofs += sizeof (struct inotify_event) + ev->len; 4439 ofs += sizeof (struct inotify_event) + ev->len;
3106 } 4440 }
3107} 4441}
3108 4442
3109inline_size void 4443inline_size ecb_cold
4444void
3110ev_check_2625 (EV_P) 4445ev_check_2625 (EV_P)
3111{ 4446{
3112 /* kernels < 2.6.25 are borked 4447 /* kernels < 2.6.25 are borked
3113 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html 4448 * http://www.ussg.indiana.edu/hypermail/linux/kernel/0711.3/1208.html
3114 */ 4449 */
… …
3119} 4454}
3120 4455
3121inline_size int 4456inline_size int
3122infy_newfd (void) 4457infy_newfd (void)
3123{ 4458{
3124#if defined (IN_CLOEXEC) && defined (IN_NONBLOCK) 4459#if defined IN_CLOEXEC && defined IN_NONBLOCK
3125 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK); 4460 int fd = inotify_init1 (IN_CLOEXEC | IN_NONBLOCK);
3126 if (fd >= 0) 4461 if (fd >= 0)
3127 return fd; 4462 return fd;
3128#endif 4463#endif
3129 return inotify_init (); 4464 return inotify_init ();
… …
3204#else 4539#else
3205# define EV_LSTAT(p,b) lstat (p, b) 4540# define EV_LSTAT(p,b) lstat (p, b)
3206#endif 4541#endif
3207 4542
3208void 4543void
3209ev_stat_stat (EV_P_ ev_stat *w) 4544ev_stat_stat (EV_P_ ev_stat *w) EV_NOEXCEPT
3210{ 4545{
3211 if (lstat (w->path, &w->attr) < 0) 4546 if (lstat (w->path, &w->attr) < 0)
3212 w->attr.st_nlink = 0; 4547 w->attr.st_nlink = 0;
3213 else if (!w->attr.st_nlink) 4548 else if (!w->attr.st_nlink)
3214 w->attr.st_nlink = 1; 4549 w->attr.st_nlink = 1;
3215} 4550}
3216 4551
3217static void noinline 4552noinline
4553static void
3218stat_timer_cb (EV_P_ ev_timer *w_, int revents) 4554stat_timer_cb (EV_P_ ev_timer *w_, int revents)
3219{ 4555{
3220 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer)); 4556 ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
3221 4557
3222 ev_statdata prev = w->attr; 4558 ev_statdata prev = w->attr;
… …
3253 ev_feed_event (EV_A_ w, EV_STAT); 4589 ev_feed_event (EV_A_ w, EV_STAT);
3254 } 4590 }
3255} 4591}
3256 4592
3257void 4593void
3258ev_stat_start (EV_P_ ev_stat *w) 4594ev_stat_start (EV_P_ ev_stat *w) EV_NOEXCEPT
3259{ 4595{
3260 if (expect_false (ev_is_active (w))) 4596 if (expect_false (ev_is_active (w)))
3261 return; 4597 return;
3262 4598
3263 ev_stat_stat (EV_A_ w); 4599 ev_stat_stat (EV_A_ w);
… …
3284 4620
3285 EV_FREQUENT_CHECK; 4621 EV_FREQUENT_CHECK;
3286} 4622}
3287 4623
3288void 4624void
3289ev_stat_stop (EV_P_ ev_stat *w) 4625ev_stat_stop (EV_P_ ev_stat *w) EV_NOEXCEPT
3290{ 4626{
3291 clear_pending (EV_A_ (W)w); 4627 clear_pending (EV_A_ (W)w);
3292 if (expect_false (!ev_is_active (w))) 4628 if (expect_false (!ev_is_active (w)))
3293 return; 4629 return;
3294 4630
… …
3310} 4646}
3311#endif 4647#endif
3312 4648
3313#if EV_IDLE_ENABLE 4649#if EV_IDLE_ENABLE
3314void 4650void
3315ev_idle_start (EV_P_ ev_idle *w) 4651ev_idle_start (EV_P_ ev_idle *w) EV_NOEXCEPT
3316{ 4652{
3317 if (expect_false (ev_is_active (w))) 4653 if (expect_false (ev_is_active (w)))
3318 return; 4654 return;
3319 4655
3320 pri_adjust (EV_A_ (W)w); 4656 pri_adjust (EV_A_ (W)w);
… …
3325 int active = ++idlecnt [ABSPRI (w)]; 4661 int active = ++idlecnt [ABSPRI (w)];
3326 4662
3327 ++idleall; 4663 ++idleall;
3328 ev_start (EV_A_ (W)w, active); 4664 ev_start (EV_A_ (W)w, active);
3329 4665
3330 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2); 4666 array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, array_needsize_noinit);
3331 idles [ABSPRI (w)][active - 1] = w; 4667 idles [ABSPRI (w)][active - 1] = w;
3332 } 4668 }
3333 4669
3334 EV_FREQUENT_CHECK; 4670 EV_FREQUENT_CHECK;
3335} 4671}
3336 4672
3337void 4673void
3338ev_idle_stop (EV_P_ ev_idle *w) 4674ev_idle_stop (EV_P_ ev_idle *w) EV_NOEXCEPT
3339{ 4675{
3340 clear_pending (EV_A_ (W)w); 4676 clear_pending (EV_A_ (W)w);
3341 if (expect_false (!ev_is_active (w))) 4677 if (expect_false (!ev_is_active (w)))
3342 return; 4678 return;
3343 4679
… …
3357} 4693}
3358#endif 4694#endif
3359 4695
3360#if EV_PREPARE_ENABLE 4696#if EV_PREPARE_ENABLE
3361void 4697void
3362ev_prepare_start (EV_P_ ev_prepare *w) 4698ev_prepare_start (EV_P_ ev_prepare *w) EV_NOEXCEPT
3363{ 4699{
3364 if (expect_false (ev_is_active (w))) 4700 if (expect_false (ev_is_active (w)))
3365 return; 4701 return;
3366 4702
3367 EV_FREQUENT_CHECK; 4703 EV_FREQUENT_CHECK;
3368 4704
3369 ev_start (EV_A_ (W)w, ++preparecnt); 4705 ev_start (EV_A_ (W)w, ++preparecnt);
3370 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2); 4706 array_needsize (ev_prepare *, prepares, preparemax, preparecnt, array_needsize_noinit);
3371 prepares [preparecnt - 1] = w; 4707 prepares [preparecnt - 1] = w;
3372 4708
3373 EV_FREQUENT_CHECK; 4709 EV_FREQUENT_CHECK;
3374} 4710}
3375 4711
3376void 4712void
3377ev_prepare_stop (EV_P_ ev_prepare *w) 4713ev_prepare_stop (EV_P_ ev_prepare *w) EV_NOEXCEPT
3378{ 4714{
3379 clear_pending (EV_A_ (W)w); 4715 clear_pending (EV_A_ (W)w);
3380 if (expect_false (!ev_is_active (w))) 4716 if (expect_false (!ev_is_active (w)))
3381 return; 4717 return;
3382 4718
… …
3395} 4731}
3396#endif 4732#endif
3397 4733
3398#if EV_CHECK_ENABLE 4734#if EV_CHECK_ENABLE
3399void 4735void
3400ev_check_start (EV_P_ ev_check *w) 4736ev_check_start (EV_P_ ev_check *w) EV_NOEXCEPT
3401{ 4737{
3402 if (expect_false (ev_is_active (w))) 4738 if (expect_false (ev_is_active (w)))
3403 return; 4739 return;
3404 4740
3405 EV_FREQUENT_CHECK; 4741 EV_FREQUENT_CHECK;
3406 4742
3407 ev_start (EV_A_ (W)w, ++checkcnt); 4743 ev_start (EV_A_ (W)w, ++checkcnt);
3408 array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2); 4744 array_needsize (ev_check *, checks, checkmax, checkcnt, array_needsize_noinit);
3409 checks [checkcnt - 1] = w; 4745 checks [checkcnt - 1] = w;
3410 4746
3411 EV_FREQUENT_CHECK; 4747 EV_FREQUENT_CHECK;
3412} 4748}
3413 4749
3414void 4750void
3415ev_check_stop (EV_P_ ev_check *w) 4751ev_check_stop (EV_P_ ev_check *w) EV_NOEXCEPT
3416{ 4752{
3417 clear_pending (EV_A_ (W)w); 4753 clear_pending (EV_A_ (W)w);
3418 if (expect_false (!ev_is_active (w))) 4754 if (expect_false (!ev_is_active (w)))
3419 return; 4755 return;
3420 4756
… …
3432 EV_FREQUENT_CHECK; 4768 EV_FREQUENT_CHECK;
3433} 4769}
3434#endif 4770#endif
3435 4771
3436#if EV_EMBED_ENABLE 4772#if EV_EMBED_ENABLE
3437void noinline 4773noinline
4774void
3438ev_embed_sweep (EV_P_ ev_embed *w) 4775ev_embed_sweep (EV_P_ ev_embed *w) EV_NOEXCEPT
3439{ 4776{
3440 ev_run (w->other, EVRUN_NOWAIT); 4777 ev_run (w->other, EVRUN_NOWAIT);
3441} 4778}
3442 4779
3443static void 4780static void
… …
3491 ev_idle_stop (EV_A_ idle); 4828 ev_idle_stop (EV_A_ idle);
3492} 4829}
3493#endif 4830#endif
3494 4831
3495void 4832void
3496ev_embed_start (EV_P_ ev_embed *w) 4833ev_embed_start (EV_P_ ev_embed *w) EV_NOEXCEPT
3497{ 4834{
3498 if (expect_false (ev_is_active (w))) 4835 if (expect_false (ev_is_active (w)))
3499 return; 4836 return;
3500 4837
3501 { 4838 {
… …
3522 4859
3523 EV_FREQUENT_CHECK; 4860 EV_FREQUENT_CHECK;
3524} 4861}
3525 4862
3526void 4863void
3527ev_embed_stop (EV_P_ ev_embed *w) 4864ev_embed_stop (EV_P_ ev_embed *w) EV_NOEXCEPT
3528{ 4865{
3529 clear_pending (EV_A_ (W)w); 4866 clear_pending (EV_A_ (W)w);
3530 if (expect_false (!ev_is_active (w))) 4867 if (expect_false (!ev_is_active (w)))
3531 return; 4868 return;
3532 4869
… …
3542} 4879}
3543#endif 4880#endif
3544 4881
3545#if EV_FORK_ENABLE 4882#if EV_FORK_ENABLE
3546void 4883void
3547ev_fork_start (EV_P_ ev_fork *w) 4884ev_fork_start (EV_P_ ev_fork *w) EV_NOEXCEPT
3548{ 4885{
3549 if (expect_false (ev_is_active (w))) 4886 if (expect_false (ev_is_active (w)))
3550 return; 4887 return;
3551 4888
3552 EV_FREQUENT_CHECK; 4889 EV_FREQUENT_CHECK;
3553 4890
3554 ev_start (EV_A_ (W)w, ++forkcnt); 4891 ev_start (EV_A_ (W)w, ++forkcnt);
3555 array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2); 4892 array_needsize (ev_fork *, forks, forkmax, forkcnt, array_needsize_noinit);
3556 forks [forkcnt - 1] = w; 4893 forks [forkcnt - 1] = w;
3557 4894
3558 EV_FREQUENT_CHECK; 4895 EV_FREQUENT_CHECK;
3559} 4896}
3560 4897
3561void 4898void
3562ev_fork_stop (EV_P_ ev_fork *w) 4899ev_fork_stop (EV_P_ ev_fork *w) EV_NOEXCEPT
3563{ 4900{
3564 clear_pending (EV_A_ (W)w); 4901 clear_pending (EV_A_ (W)w);
3565 if (expect_false (!ev_is_active (w))) 4902 if (expect_false (!ev_is_active (w)))
3566 return; 4903 return;
3567 4904
… …
3578 4915
3579 EV_FREQUENT_CHECK; 4916 EV_FREQUENT_CHECK;
3580} 4917}
3581#endif 4918#endif
3582 4919
3583#if EV_ASYNC_ENABLE 4920#if EV_CLEANUP_ENABLE
3584void 4921void
3585ev_async_start (EV_P_ ev_async *w) 4922ev_cleanup_start (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3586{ 4923{
3587 if (expect_false (ev_is_active (w))) 4924 if (expect_false (ev_is_active (w)))
3588 return; 4925 return;
3589 4926
3590 w->sent = 0;
3591
3592 evpipe_init (EV_A);
3593
3594 EV_FREQUENT_CHECK; 4927 EV_FREQUENT_CHECK;
3595 4928
3596 ev_start (EV_A_ (W)w, ++asynccnt); 4929 ev_start (EV_A_ (W)w, ++cleanupcnt);
3597 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2); 4930 array_needsize (ev_cleanup *, cleanups, cleanupmax, cleanupcnt, array_needsize_noinit);
3598 asyncs [asynccnt - 1] = w; 4931 cleanups [cleanupcnt - 1] = w;
3599 4932
4933 /* cleanup watchers should never keep a refcount on the loop */
4934 ev_unref (EV_A);
3600 EV_FREQUENT_CHECK; 4935 EV_FREQUENT_CHECK;
3601} 4936}
3602 4937
3603void 4938void
3604ev_async_stop (EV_P_ ev_async *w) 4939ev_cleanup_stop (EV_P_ ev_cleanup *w) EV_NOEXCEPT
3605{ 4940{
3606 clear_pending (EV_A_ (W)w); 4941 clear_pending (EV_A_ (W)w);
3607 if (expect_false (!ev_is_active (w))) 4942 if (expect_false (!ev_is_active (w)))
3608 return; 4943 return;
3609 4944
3610 EV_FREQUENT_CHECK; 4945 EV_FREQUENT_CHECK;
4946 ev_ref (EV_A);
4947
4948 {
4949 int active = ev_active (w);
4950
4951 cleanups [active - 1] = cleanups [--cleanupcnt];
4952 ev_active (cleanups [active - 1]) = active;
4953 }
4954
4955 ev_stop (EV_A_ (W)w);
4956
4957 EV_FREQUENT_CHECK;
4958}
4959#endif
4960
4961#if EV_ASYNC_ENABLE
4962void
4963ev_async_start (EV_P_ ev_async *w) EV_NOEXCEPT
4964{
4965 if (expect_false (ev_is_active (w)))
4966 return;
4967
4968 w->sent = 0;
4969
4970 evpipe_init (EV_A);
4971
4972 EV_FREQUENT_CHECK;
4973
4974 ev_start (EV_A_ (W)w, ++asynccnt);
4975 array_needsize (ev_async *, asyncs, asyncmax, asynccnt, array_needsize_noinit);
4976 asyncs [asynccnt - 1] = w;
4977
4978 EV_FREQUENT_CHECK;
4979}
4980
4981void
4982ev_async_stop (EV_P_ ev_async *w) EV_NOEXCEPT
4983{
4984 clear_pending (EV_A_ (W)w);
4985 if (expect_false (!ev_is_active (w)))
4986 return;
4987
4988 EV_FREQUENT_CHECK;
3611 4989
3612 { 4990 {
3613 int active = ev_active (w); 4991 int active = ev_active (w);
3614 4992
3615 asyncs [active - 1] = asyncs [--asynccnt]; 4993 asyncs [active - 1] = asyncs [--asynccnt];
… …
3620 4998
3621 EV_FREQUENT_CHECK; 4999 EV_FREQUENT_CHECK;
3622} 5000}
3623 5001
3624void 5002void
3625ev_async_send (EV_P_ ev_async *w) 5003ev_async_send (EV_P_ ev_async *w) EV_NOEXCEPT
3626{ 5004{
3627 w->sent = 1; 5005 w->sent = 1;
3628 evpipe_write (EV_A_ &async_pending); 5006 evpipe_write (EV_A_ &async_pending);
3629} 5007}
3630#endif 5008#endif
… …
3667 5045
3668 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io)); 5046 once_cb (EV_A_ once, revents | ev_clear_pending (EV_A_ &once->io));
3669} 5047}
3670 5048
3671void 5049void
3672ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) 5050ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg) EV_NOEXCEPT
3673{ 5051{
3674 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once)); 5052 struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
3675
3676 if (expect_false (!once))
3677 {
3678 cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMER, arg);
3679 return;
3680 }
3681 5053
3682 once->cb = cb; 5054 once->cb = cb;
3683 once->arg = arg; 5055 once->arg = arg;
3684 5056
3685 ev_init (&once->io, once_cb_io); 5057 ev_init (&once->io, once_cb_io);
… …
3698} 5070}
3699 5071
3700/*****************************************************************************/ 5072/*****************************************************************************/
3701 5073
3702#if EV_WALK_ENABLE 5074#if EV_WALK_ENABLE
5075ecb_cold
3703void 5076void
3704ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) 5077ev_walk (EV_P_ int types, void (*cb)(EV_P_ int type, void *w)) EV_NOEXCEPT
3705{ 5078{
3706 int i, j; 5079 int i, j;
3707 ev_watcher_list *wl, *wn; 5080 ev_watcher_list *wl, *wn;
3708 5081
3709 if (types & (EV_IO | EV_EMBED)) 5082 if (types & (EV_IO | EV_EMBED))
… …
3752 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i])); 5125 cb (EV_A_ EV_PERIODIC, ANHE_w (periodics [i]));
3753#endif 5126#endif
3754 5127
3755#if EV_IDLE_ENABLE 5128#if EV_IDLE_ENABLE
3756 if (types & EV_IDLE) 5129 if (types & EV_IDLE)
3757 for (j = NUMPRI; i--; ) 5130 for (j = NUMPRI; j--; )
3758 for (i = idlecnt [j]; i--; ) 5131 for (i = idlecnt [j]; i--; )
3759 cb (EV_A_ EV_IDLE, idles [j][i]); 5132 cb (EV_A_ EV_IDLE, idles [j][i]);
3760#endif 5133#endif
3761 5134
3762#if EV_FORK_ENABLE 5135#if EV_FORK_ENABLE
… …
3815 5188
3816#if EV_MULTIPLICITY 5189#if EV_MULTIPLICITY
3817 #include "ev_wrap.h" 5190 #include "ev_wrap.h"
3818#endif 5191#endif
3819 5192
3820EV_CPP(})
3821

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